drivers/scsi/megaraid/megaraid_sas_base.c

   1 /*
   2  *  Linux MegaRAID driver for SAS based RAID controllers
   3  *
   4  *  Copyright (c) 2003-2012  LSI Corporation.
   5  *
   6  *  This program is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU General Public License
   8  *  as published by the Free Software Foundation; either version 2
   9  *  of the License, or (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  *  FILE: megaraid_sas_base.c
  21  *  Version : 06.805.06.00-rc1
  22  *
  23  *  Authors: LSI Corporation
  24  *           Sreenivas Bagalkote
  25  *           Sumant Patro
  26  *           Bo Yang
  27  *           Adam Radford <linuxraid@lsi.com>
  28  *
  29  *  Send feedback to: <megaraidlinux@lsi.com>
  30  *
  31  *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
  32  *     ATTN: Linuxraid
  33  */
  34
  35 #include <linux/kernel.h>
  36 #include <linux/types.h>
  37 #include <linux/pci.h>
  38 #include <linux/list.h>
  39 #include <linux/moduleparam.h>
  40 #include <linux/module.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/delay.h>
  44 #include <linux/uio.h>
  45 #include <linux/slab.h>
  46 #include <asm/uaccess.h>
  47 #include <linux/fs.h>
  48 #include <linux/compat.h>
  49 #include <linux/blkdev.h>
  50 #include <linux/mutex.h>
  51 #include <linux/poll.h>
  52
  53 #include <scsi/scsi.h>
  54 #include <scsi/scsi_cmnd.h>
  55 #include <scsi/scsi_device.h>
  56 #include <scsi/scsi_host.h>
  57 #include <scsi/scsi_tcq.h>
  58 #include "megaraid_sas_fusion.h"
  59 #include "megaraid_sas.h"
  60
  61 /*
  62  * Number of sectors per IO command
  63  * Will be set in megasas_init_mfi if user does not provide
  64  */
  65 static unsigned int max_sectors;
  66 module_param_named(max_sectors, max_sectors, int, 0);
  67 MODULE_PARM_DESC(max_sectors,
  68         "Maximum number of sectors per IO command");
  69
  70 static int msix_disable;
  71 module_param(msix_disable, int, S_IRUGO);
  72 MODULE_PARM_DESC(msix_disable, "Disable MSI-X interrupt handling. Default: 0");
  73
  74 static unsigned int msix_vectors;
  75 module_param(msix_vectors, int, S_IRUGO);
  76 MODULE_PARM_DESC(msix_vectors, "MSI-X max vector count. Default: Set by FW");
  77
  78 static int allow_vf_ioctls;
  79 module_param(allow_vf_ioctls, int, S_IRUGO);
  80 MODULE_PARM_DESC(allow_vf_ioctls, "Allow ioctls in SR-IOV VF mode. Default: 0");
  81
  82 static int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH;
  83 module_param(throttlequeuedepth, int, S_IRUGO);
  84 MODULE_PARM_DESC(throttlequeuedepth,
  85         "Adapter queue depth when throttled due to I/O timeout. Default: 16");
  86
  87 int resetwaittime = MEGASAS_RESET_WAIT_TIME;
  88 module_param(resetwaittime, int, S_IRUGO);
  89 MODULE_PARM_DESC(resetwaittime, "Wait time in seconds after I/O timeout "
  90                  "before resetting adapter. Default: 180");
  91
  92 int smp_affinity_enable = 1;
  93 module_param(smp_affinity_enable, int, S_IRUGO);
  94 MODULE_PARM_DESC(smp_affinity_enable, "SMP affinity feature enable/disbale Default: enable(1)");
  95
  96 MODULE_LICENSE("GPL");
  97 MODULE_VERSION(MEGASAS_VERSION);
  98 MODULE_AUTHOR("megaraidlinux@lsi.com");
  99 MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
 100
 101 int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
 102 static int megasas_get_pd_list(struct megasas_instance *instance);
 103 static int megasas_ld_list_query(struct megasas_instance *instance,
 104                                  u8 query_type);
 105 static int megasas_issue_init_mfi(struct megasas_instance *instance);
 106 static int megasas_register_aen(struct megasas_instance *instance,
 107                                 u32 seq_num, u32 class_locale_word);
 108 /*
 109  * PCI ID table for all supported controllers
 110  */
 111 static struct pci_device_id megasas_pci_table[] = {
 112
 113         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
 114         /* xscale IOP */
 115         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
 116         /* ppc IOP */
 117         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
 118         /* ppc IOP */
 119         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
 120         /* gen2*/
 121         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
 122         /* gen2*/
 123         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
 124         /* skinny*/
 125         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
 126         /* skinny*/
 127         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
 128         /* xscale IOP, vega */
 129         {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
 130         /* xscale IOP */
 131         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
 132         /* Fusion */
 133         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_PLASMA)},
 134         /* Plasma */
 135         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_INVADER)},
 136         /* Invader */
 137         {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FURY)},
 138         /* Fury */
 139         {}
 140 };
 141
 142 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
 143
 144 static int megasas_mgmt_majorno;
 145 struct megasas_mgmt_info megasas_mgmt_info;
 146 static struct fasync_struct *megasas_async_queue;
 147 static DEFINE_MUTEX(megasas_async_queue_mutex);
 148
 149 static int megasas_poll_wait_aen;
 150 static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
 151 static u32 support_poll_for_event;
 152 u32 megasas_dbg_lvl;
 153 static u32 support_device_change;
 154
 155 /* define lock for aen poll */
 156 spinlock_t poll_aen_lock;
 157
 158 void
 159 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
 160                      u8 alt_status);
 161 static u32
 162 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs);
 163 static int
 164 megasas_adp_reset_gen2(struct megasas_instance *instance,
 165                        struct megasas_register_set __iomem *reg_set);
 166 static irqreturn_t megasas_isr(int irq, void *devp);
 167 static u32
 168 megasas_init_adapter_mfi(struct megasas_instance *instance);
 169 u32
 170 megasas_build_and_issue_cmd(struct megasas_instance *instance,
 171                             struct scsi_cmnd *scmd);
 172 static void megasas_complete_cmd_dpc(unsigned long instance_addr);
 173 void
 174 megasas_release_fusion(struct megasas_instance *instance);
 175 int
 176 megasas_ioc_init_fusion(struct megasas_instance *instance);
 177 void
 178 megasas_free_cmds_fusion(struct megasas_instance *instance);
 179 u8
 180 megasas_get_map_info(struct megasas_instance *instance);
 181 int
 182 megasas_sync_map_info(struct megasas_instance *instance);
 183 int
 184 wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
 185         int seconds);
 186 void megasas_reset_reply_desc(struct megasas_instance *instance);
 187 int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout);
 188 void megasas_fusion_ocr_wq(struct work_struct *work);
 189 static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
 190                                          int initial);
 191 int megasas_check_mpio_paths(struct megasas_instance *instance,
 192                              struct scsi_cmnd *scmd);
 193
 194 void
 195 megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
 196 {
 197         instance->instancet->fire_cmd(instance,
 198                 cmd->frame_phys_addr, 0, instance->reg_set);
 199 }
 200
 201 /**
 202  * megasas_get_cmd -    Get a command from the free pool
 203  * @instance:           Adapter soft state
 204  *
 205  * Returns a free command from the pool
 206  */
 207 struct megasas_cmd *megasas_get_cmd(struct megasas_instance
 208                                                   *instance)
 209 {
 210         unsigned long flags;
 211         struct megasas_cmd *cmd = NULL;
 212
 213         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
 214
 215         if (!list_empty(&instance->cmd_pool)) {
 216                 cmd = list_entry((&instance->cmd_pool)->next,
 217                                  struct megasas_cmd, list);
 218                 list_del_init(&cmd->list);
 219                 atomic_set(&cmd->mfi_mpt_pthr, MFI_MPT_DETACHED);
 220         } else {
 221                 printk(KERN_ERR "megasas: Command pool empty!\n");
 222         }
 223
 224         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
 225         return cmd;
 226 }
 227
 228 /**
 229  * __megasas_return_cmd -       Return a cmd to free command pool
 230  * @instance:           Adapter soft state
 231  * @cmd:                Command packet to be returned to free command pool
 232  */
 233 inline void
 234 __megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
 235 {
 236         /*
 237          * Don't go ahead and free the MFI frame, if corresponding
 238          * MPT frame is not freed(valid for only fusion adapters).
 239          * In case of MFI adapters, anyways for any allocated MFI
 240          * frame will have cmd->mfi_mpt_mpthr set to MFI_MPT_DETACHED
 241          */
 242         if (atomic_read(&cmd->mfi_mpt_pthr) != MFI_MPT_DETACHED)
 243                 return;
 244
 245         cmd->scmd = NULL;
 246         cmd->frame_count = 0;
 247         cmd->is_wait_event = 0;
 248         cmd->mpt_pthr_cmd_blocked = NULL;
 249
 250         if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
 251             (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
 252             (instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
 253             (reset_devices))
 254                 cmd->frame->hdr.cmd = MFI_CMD_INVALID;
 255
 256         atomic_set(&cmd->mfi_mpt_pthr, MFI_LIST_ADDED);
 257         list_add(&cmd->list, (&instance->cmd_pool)->next);
 258 }
 259
 260 /**
 261  * megasas_return_cmd - Return a cmd to free command pool
 262  * @instance:           Adapter soft state
 263  * @cmd:                Command packet to be returned to free command pool
 264  */
 265 inline void
 266 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
 267 {
 268         unsigned long flags;
 269
 270         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
 271         __megasas_return_cmd(instance, cmd);
 272         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
 273 }
 274
 275
 276 /**
 277 *       The following functions are defined for xscale
 278 *       (deviceid : 1064R, PERC5) controllers
 279 */
 280
 281 /**
 282  * megasas_enable_intr_xscale - Enables interrupts
 283  * @regs:                       MFI register set
 284  */
 285 static inline void
 286 megasas_enable_intr_xscale(struct megasas_instance *instance)
 287 {
 288         struct megasas_register_set __iomem *regs;
 289         regs = instance->reg_set;
 290         writel(0, &(regs)->outbound_intr_mask);
 291
 292         /* Dummy readl to force pci flush */
 293         readl(&regs->outbound_intr_mask);
 294 }
 295
 296 /**
 297  * megasas_disable_intr_xscale -Disables interrupt
 298  * @regs:                       MFI register set
 299  */
 300 static inline void
 301 megasas_disable_intr_xscale(struct megasas_instance *instance)
 302 {
 303         struct megasas_register_set __iomem *regs;
 304         u32 mask = 0x1f;
 305         regs = instance->reg_set;
 306         writel(mask, &regs->outbound_intr_mask);
 307         /* Dummy readl to force pci flush */
 308         readl(&regs->outbound_intr_mask);
 309 }
 310
 311 /**
 312  * megasas_read_fw_status_reg_xscale - returns the current FW status value
 313  * @regs:                       MFI register set
 314  */
 315 static u32
 316 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
 317 {
 318         return readl(&(regs)->outbound_msg_0);
 319 }
 320 /**
 321  * megasas_clear_interrupt_xscale -     Check & clear interrupt
 322  * @regs:                               MFI register set
 323  */
 324 static int
 325 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
 326 {
 327         u32 status;
 328         u32 mfiStatus = 0;
 329         /*
 330          * Check if it is our interrupt
 331          */
 332         status = readl(&regs->outbound_intr_status);
 333
 334         if (status & MFI_OB_INTR_STATUS_MASK)
 335                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
 336         if (status & MFI_XSCALE_OMR0_CHANGE_INTERRUPT)
 337                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
 338
 339         /*
 340          * Clear the interrupt by writing back the same value
 341          */
 342         if (mfiStatus)
 343                 writel(status, &regs->outbound_intr_status);
 344
 345         /* Dummy readl to force pci flush */
 346         readl(&regs->outbound_intr_status);
 347
 348         return mfiStatus;
 349 }
 350
 351 /**
 352  * megasas_fire_cmd_xscale -    Sends command to the FW
 353  * @frame_phys_addr :           Physical address of cmd
 354  * @frame_count :               Number of frames for the command
 355  * @regs :                      MFI register set
 356  */
 357 static inline void
 358 megasas_fire_cmd_xscale(struct megasas_instance *instance,
 359                 dma_addr_t frame_phys_addr,
 360                 u32 frame_count,
 361                 struct megasas_register_set __iomem *regs)
 362 {
 363         unsigned long flags;
 364         spin_lock_irqsave(&instance->hba_lock, flags);
 365         writel((frame_phys_addr >> 3)|(frame_count),
 366                &(regs)->inbound_queue_port);
 367         spin_unlock_irqrestore(&instance->hba_lock, flags);
 368 }
 369
 370 /**
 371  * megasas_adp_reset_xscale -  For controller reset
 372  * @regs:                              MFI register set
 373  */
 374 static int
 375 megasas_adp_reset_xscale(struct megasas_instance *instance,
 376         struct megasas_register_set __iomem *regs)
 377 {
 378         u32 i;
 379         u32 pcidata;
 380         writel(MFI_ADP_RESET, &regs->inbound_doorbell);
 381
 382         for (i = 0; i < 3; i++)
 383                 msleep(1000); /* sleep for 3 secs */
 384         pcidata  = 0;
 385         pci_read_config_dword(instance->pdev, MFI_1068_PCSR_OFFSET, &pcidata);
 386         printk(KERN_NOTICE "pcidata = %x\n", pcidata);
 387         if (pcidata & 0x2) {
 388                 printk(KERN_NOTICE "mfi 1068 offset read=%x\n", pcidata);
 389                 pcidata &= ~0x2;
 390                 pci_write_config_dword(instance->pdev,
 391                                 MFI_1068_PCSR_OFFSET, pcidata);
 392
 393                 for (i = 0; i < 2; i++)
 394                         msleep(1000); /* need to wait 2 secs again */
 395
 396                 pcidata  = 0;
 397                 pci_read_config_dword(instance->pdev,
 398                                 MFI_1068_FW_HANDSHAKE_OFFSET, &pcidata);
 399                 printk(KERN_NOTICE "1068 offset handshake read=%x\n", pcidata);
 400                 if ((pcidata & 0xffff0000) == MFI_1068_FW_READY) {
 401                         printk(KERN_NOTICE "1068 offset pcidt=%x\n", pcidata);
 402                         pcidata = 0;
 403                         pci_write_config_dword(instance->pdev,
 404                                 MFI_1068_FW_HANDSHAKE_OFFSET, pcidata);
 405                 }
 406         }
 407         return 0;
 408 }
 409
 410 /**
 411  * megasas_check_reset_xscale - For controller reset check
 412  * @regs:                               MFI register set
 413  */
 414 static int
 415 megasas_check_reset_xscale(struct megasas_instance *instance,
 416                 struct megasas_register_set __iomem *regs)
 417 {
 418
 419         if ((instance->adprecovery != MEGASAS_HBA_OPERATIONAL) &&
 420             (le32_to_cpu(*instance->consumer) ==
 421                 MEGASAS_ADPRESET_INPROG_SIGN))
 422                 return 1;
 423         return 0;
 424 }
 425
 426 static struct megasas_instance_template megasas_instance_template_xscale = {
 427
 428         .fire_cmd = megasas_fire_cmd_xscale,
 429         .enable_intr = megasas_enable_intr_xscale,
 430         .disable_intr = megasas_disable_intr_xscale,
 431         .clear_intr = megasas_clear_intr_xscale,
 432         .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
 433         .adp_reset = megasas_adp_reset_xscale,
 434         .check_reset = megasas_check_reset_xscale,
 435         .service_isr = megasas_isr,
 436         .tasklet = megasas_complete_cmd_dpc,
 437         .init_adapter = megasas_init_adapter_mfi,
 438         .build_and_issue_cmd = megasas_build_and_issue_cmd,
 439         .issue_dcmd = megasas_issue_dcmd,
 440 };
 441
 442 /**
 443 *       This is the end of set of functions & definitions specific
 444 *       to xscale (deviceid : 1064R, PERC5) controllers
 445 */
 446
 447 /**
 448 *       The following functions are defined for ppc (deviceid : 0x60)
 449 *       controllers
 450 */
 451
 452 /**
 453  * megasas_enable_intr_ppc -    Enables interrupts
 454  * @regs:                       MFI register set
 455  */
 456 static inline void
 457 megasas_enable_intr_ppc(struct megasas_instance *instance)
 458 {
 459         struct megasas_register_set __iomem *regs;
 460         regs = instance->reg_set;
 461         writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
 462
 463         writel(~0x80000000, &(regs)->outbound_intr_mask);
 464
 465         /* Dummy readl to force pci flush */
 466         readl(&regs->outbound_intr_mask);
 467 }
 468
 469 /**
 470  * megasas_disable_intr_ppc -   Disable interrupt
 471  * @regs:                       MFI register set
 472  */
 473 static inline void
 474 megasas_disable_intr_ppc(struct megasas_instance *instance)
 475 {
 476         struct megasas_register_set __iomem *regs;
 477         u32 mask = 0xFFFFFFFF;
 478         regs = instance->reg_set;
 479         writel(mask, &regs->outbound_intr_mask);
 480         /* Dummy readl to force pci flush */
 481         readl(&regs->outbound_intr_mask);
 482 }
 483
 484 /**
 485  * megasas_read_fw_status_reg_ppc - returns the current FW status value
 486  * @regs:                       MFI register set
 487  */
 488 static u32
 489 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
 490 {
 491         return readl(&(regs)->outbound_scratch_pad);
 492 }
 493
 494 /**
 495  * megasas_clear_interrupt_ppc -        Check & clear interrupt
 496  * @regs:                               MFI register set
 497  */
 498 static int
 499 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
 500 {
 501         u32 status, mfiStatus = 0;
 502
 503         /*
 504          * Check if it is our interrupt
 505          */
 506         status = readl(&regs->outbound_intr_status);
 507
 508         if (status & MFI_REPLY_1078_MESSAGE_INTERRUPT)
 509                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
 510
 511         if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT)
 512                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
 513
 514         /*
 515          * Clear the interrupt by writing back the same value
 516          */
 517         writel(status, &regs->outbound_doorbell_clear);
 518
 519         /* Dummy readl to force pci flush */
 520         readl(&regs->outbound_doorbell_clear);
 521
 522         return mfiStatus;
 523 }
 524
 525 /**
 526  * megasas_fire_cmd_ppc -       Sends command to the FW
 527  * @frame_phys_addr :           Physical address of cmd
 528  * @frame_count :               Number of frames for the command
 529  * @regs :                      MFI register set
 530  */
 531 static inline void
 532 megasas_fire_cmd_ppc(struct megasas_instance *instance,
 533                 dma_addr_t frame_phys_addr,
 534                 u32 frame_count,
 535                 struct megasas_register_set __iomem *regs)
 536 {
 537         unsigned long flags;
 538         spin_lock_irqsave(&instance->hba_lock, flags);
 539         writel((frame_phys_addr | (frame_count<<1))|1,
 540                         &(regs)->inbound_queue_port);
 541         spin_unlock_irqrestore(&instance->hba_lock, flags);
 542 }
 543
 544 /**
 545  * megasas_check_reset_ppc -    For controller reset check
 546  * @regs:                               MFI register set
 547  */
 548 static int
 549 megasas_check_reset_ppc(struct megasas_instance *instance,
 550                         struct megasas_register_set __iomem *regs)
 551 {
 552         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
 553                 return 1;
 554
 555         return 0;
 556 }
 557
 558 static struct megasas_instance_template megasas_instance_template_ppc = {
 559
 560         .fire_cmd = megasas_fire_cmd_ppc,
 561         .enable_intr = megasas_enable_intr_ppc,
 562         .disable_intr = megasas_disable_intr_ppc,
 563         .clear_intr = megasas_clear_intr_ppc,
 564         .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
 565         .adp_reset = megasas_adp_reset_xscale,
 566         .check_reset = megasas_check_reset_ppc,
 567         .service_isr = megasas_isr,
 568         .tasklet = megasas_complete_cmd_dpc,
 569         .init_adapter = megasas_init_adapter_mfi,
 570         .build_and_issue_cmd = megasas_build_and_issue_cmd,
 571         .issue_dcmd = megasas_issue_dcmd,
 572 };
 573
 574 /**
 575  * megasas_enable_intr_skinny - Enables interrupts
 576  * @regs:                       MFI register set
 577  */
 578 static inline void
 579 megasas_enable_intr_skinny(struct megasas_instance *instance)
 580 {
 581         struct megasas_register_set __iomem *regs;
 582         regs = instance->reg_set;
 583         writel(0xFFFFFFFF, &(regs)->outbound_intr_mask);
 584
 585         writel(~MFI_SKINNY_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 586
 587         /* Dummy readl to force pci flush */
 588         readl(&regs->outbound_intr_mask);
 589 }
 590
 591 /**
 592  * megasas_disable_intr_skinny -        Disables interrupt
 593  * @regs:                       MFI register set
 594  */
 595 static inline void
 596 megasas_disable_intr_skinny(struct megasas_instance *instance)
 597 {
 598         struct megasas_register_set __iomem *regs;
 599         u32 mask = 0xFFFFFFFF;
 600         regs = instance->reg_set;
 601         writel(mask, &regs->outbound_intr_mask);
 602         /* Dummy readl to force pci flush */
 603         readl(&regs->outbound_intr_mask);
 604 }
 605
 606 /**
 607  * megasas_read_fw_status_reg_skinny - returns the current FW status value
 608  * @regs:                       MFI register set
 609  */
 610 static u32
 611 megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
 612 {
 613         return readl(&(regs)->outbound_scratch_pad);
 614 }
 615
 616 /**
 617  * megasas_clear_interrupt_skinny -     Check & clear interrupt
 618  * @regs:                               MFI register set
 619  */
 620 static int
 621 megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
 622 {
 623         u32 status;
 624         u32 mfiStatus = 0;
 625
 626         /*
 627          * Check if it is our interrupt
 628          */
 629         status = readl(&regs->outbound_intr_status);
 630
 631         if (!(status & MFI_SKINNY_ENABLE_INTERRUPT_MASK)) {
 632                 return 0;
 633         }
 634
 635         /*
 636          * Check if it is our interrupt
 637          */
 638         if ((megasas_read_fw_status_reg_skinny(regs) & MFI_STATE_MASK) ==
 639             MFI_STATE_FAULT) {
 640                 mfiStatus = MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
 641         } else
 642                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
 643
 644         /*
 645          * Clear the interrupt by writing back the same value
 646          */
 647         writel(status, &regs->outbound_intr_status);
 648
 649         /*
 650         * dummy read to flush PCI
 651         */
 652         readl(&regs->outbound_intr_status);
 653
 654         return mfiStatus;
 655 }
 656
 657 /**
 658  * megasas_fire_cmd_skinny -    Sends command to the FW
 659  * @frame_phys_addr :           Physical address of cmd
 660  * @frame_count :               Number of frames for the command
 661  * @regs :                      MFI register set
 662  */
 663 static inline void
 664 megasas_fire_cmd_skinny(struct megasas_instance *instance,
 665                         dma_addr_t frame_phys_addr,
 666                         u32 frame_count,
 667                         struct megasas_register_set __iomem *regs)
 668 {
 669         unsigned long flags;
 670         spin_lock_irqsave(&instance->hba_lock, flags);
 671         writel(upper_32_bits(frame_phys_addr),
 672                &(regs)->inbound_high_queue_port);
 673         writel((lower_32_bits(frame_phys_addr) | (frame_count<<1))|1,
 674                &(regs)->inbound_low_queue_port);
 675         spin_unlock_irqrestore(&instance->hba_lock, flags);
 676 }
 677
 678 /**
 679  * megasas_check_reset_skinny - For controller reset check
 680  * @regs:                               MFI register set
 681  */
 682 static int
 683 megasas_check_reset_skinny(struct megasas_instance *instance,
 684                                 struct megasas_register_set __iomem *regs)
 685 {
 686         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
 687                 return 1;
 688
 689         return 0;
 690 }
 691
 692 static struct megasas_instance_template megasas_instance_template_skinny = {
 693
 694         .fire_cmd = megasas_fire_cmd_skinny,
 695         .enable_intr = megasas_enable_intr_skinny,
 696         .disable_intr = megasas_disable_intr_skinny,
 697         .clear_intr = megasas_clear_intr_skinny,
 698         .read_fw_status_reg = megasas_read_fw_status_reg_skinny,
 699         .adp_reset = megasas_adp_reset_gen2,
 700         .check_reset = megasas_check_reset_skinny,
 701         .service_isr = megasas_isr,
 702         .tasklet = megasas_complete_cmd_dpc,
 703         .init_adapter = megasas_init_adapter_mfi,
 704         .build_and_issue_cmd = megasas_build_and_issue_cmd,
 705         .issue_dcmd = megasas_issue_dcmd,
 706 };
 707
 708
 709 /**
 710 *       The following functions are defined for gen2 (deviceid : 0x78 0x79)
 711 *       controllers
 712 */
 713
 714 /**
 715  * megasas_enable_intr_gen2 -  Enables interrupts
 716  * @regs:                      MFI register set
 717  */
 718 static inline void
 719 megasas_enable_intr_gen2(struct megasas_instance *instance)
 720 {
 721         struct megasas_register_set __iomem *regs;
 722         regs = instance->reg_set;
 723         writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
 724
 725         /* write ~0x00000005 (4 & 1) to the intr mask*/
 726         writel(~MFI_GEN2_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
 727
 728         /* Dummy readl to force pci flush */
 729         readl(&regs->outbound_intr_mask);
 730 }
 731
 732 /**
 733  * megasas_disable_intr_gen2 - Disables interrupt
 734  * @regs:                      MFI register set
 735  */
 736 static inline void
 737 megasas_disable_intr_gen2(struct megasas_instance *instance)
 738 {
 739         struct megasas_register_set __iomem *regs;
 740         u32 mask = 0xFFFFFFFF;
 741         regs = instance->reg_set;
 742         writel(mask, &regs->outbound_intr_mask);
 743         /* Dummy readl to force pci flush */
 744         readl(&regs->outbound_intr_mask);
 745 }
 746
 747 /**
 748  * megasas_read_fw_status_reg_gen2 - returns the current FW status value
 749  * @regs:                      MFI register set
 750  */
 751 static u32
 752 megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
 753 {
 754         return readl(&(regs)->outbound_scratch_pad);
 755 }
 756
 757 /**
 758  * megasas_clear_interrupt_gen2 -      Check & clear interrupt
 759  * @regs:                              MFI register set
 760  */
 761 static int
 762 megasas_clear_intr_gen2(struct megasas_register_set __iomem *regs)
 763 {
 764         u32 status;
 765         u32 mfiStatus = 0;
 766         /*
 767          * Check if it is our interrupt
 768          */
 769         status = readl(&regs->outbound_intr_status);
 770
 771         if (status & MFI_INTR_FLAG_REPLY_MESSAGE) {
 772                 mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
 773         }
 774         if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT) {
 775                 mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
 776         }
 777
 778         /*
 779          * Clear the interrupt by writing back the same value
 780          */
 781         if (mfiStatus)
 782                 writel(status, &regs->outbound_doorbell_clear);
 783
 784         /* Dummy readl to force pci flush */
 785         readl(&regs->outbound_intr_status);
 786
 787         return mfiStatus;
 788 }
 789 /**
 790  * megasas_fire_cmd_gen2 -     Sends command to the FW
 791  * @frame_phys_addr :          Physical address of cmd
 792  * @frame_count :              Number of frames for the command
 793  * @regs :                     MFI register set
 794  */
 795 static inline void
 796 megasas_fire_cmd_gen2(struct megasas_instance *instance,
 797                         dma_addr_t frame_phys_addr,
 798                         u32 frame_count,
 799                         struct megasas_register_set __iomem *regs)
 800 {
 801         unsigned long flags;
 802         spin_lock_irqsave(&instance->hba_lock, flags);
 803         writel((frame_phys_addr | (frame_count<<1))|1,
 804                         &(regs)->inbound_queue_port);
 805         spin_unlock_irqrestore(&instance->hba_lock, flags);
 806 }
 807
 808 /**
 809  * megasas_adp_reset_gen2 -     For controller reset
 810  * @regs:                               MFI register set
 811  */
 812 static int
 813 megasas_adp_reset_gen2(struct megasas_instance *instance,
 814                         struct megasas_register_set __iomem *reg_set)
 815 {
 816         u32                     retry = 0 ;
 817         u32                     HostDiag;
 818         u32                     *seq_offset = &reg_set->seq_offset;
 819         u32                     *hostdiag_offset = &reg_set->host_diag;
 820
 821         if (instance->instancet == &megasas_instance_template_skinny) {
 822                 seq_offset = &reg_set->fusion_seq_offset;
 823                 hostdiag_offset = &reg_set->fusion_host_diag;
 824         }
 825
 826         writel(0, seq_offset);
 827         writel(4, seq_offset);
 828         writel(0xb, seq_offset);
 829         writel(2, seq_offset);
 830         writel(7, seq_offset);
 831         writel(0xd, seq_offset);
 832
 833         msleep(1000);
 834
 835         HostDiag = (u32)readl(hostdiag_offset);
 836
 837         while ( !( HostDiag & DIAG_WRITE_ENABLE) ) {
 838                 msleep(100);
 839                 HostDiag = (u32)readl(hostdiag_offset);
 840                 printk(KERN_NOTICE "RESETGEN2: retry=%x, hostdiag=%x\n",
 841                                         retry, HostDiag);
 842
 843                 if (retry++ >= 100)
 844                         return 1;
 845
 846         }
 847
 848         printk(KERN_NOTICE "ADP_RESET_GEN2: HostDiag=%x\n", HostDiag);
 849
 850         writel((HostDiag | DIAG_RESET_ADAPTER), hostdiag_offset);
 851
 852         ssleep(10);
 853
 854         HostDiag = (u32)readl(hostdiag_offset);
 855         while ( ( HostDiag & DIAG_RESET_ADAPTER) ) {
 856                 msleep(100);
 857                 HostDiag = (u32)readl(hostdiag_offset);
 858                 printk(KERN_NOTICE "RESET_GEN2: retry=%x, hostdiag=%x\n",
 859                                 retry, HostDiag);
 860
 861                 if (retry++ >= 1000)
 862                         return 1;
 863
 864         }
 865         return 0;
 866 }
 867
 868 /**
 869  * megasas_check_reset_gen2 -   For controller reset check
 870  * @regs:                               MFI register set
 871  */
 872 static int
 873 megasas_check_reset_gen2(struct megasas_instance *instance,
 874                 struct megasas_register_set __iomem *regs)
 875 {
 876         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
 877                 return 1;
 878         }
 879
 880         return 0;
 881 }
 882
 883 static struct megasas_instance_template megasas_instance_template_gen2 = {
 884
 885         .fire_cmd = megasas_fire_cmd_gen2,
 886         .enable_intr = megasas_enable_intr_gen2,
 887         .disable_intr = megasas_disable_intr_gen2,
 888         .clear_intr = megasas_clear_intr_gen2,
 889         .read_fw_status_reg = megasas_read_fw_status_reg_gen2,
 890         .adp_reset = megasas_adp_reset_gen2,
 891         .check_reset = megasas_check_reset_gen2,
 892         .service_isr = megasas_isr,
 893         .tasklet = megasas_complete_cmd_dpc,
 894         .init_adapter = megasas_init_adapter_mfi,
 895         .build_and_issue_cmd = megasas_build_and_issue_cmd,
 896         .issue_dcmd = megasas_issue_dcmd,
 897 };
 898
 899 /**
 900 *       This is the end of set of functions & definitions
 901 *       specific to gen2 (deviceid : 0x78, 0x79) controllers
 902 */
 903
 904 /*
 905  * Template added for TB (Fusion)
 906  */
 907 extern struct megasas_instance_template megasas_instance_template_fusion;
 908
 909 /**
 910  * megasas_issue_polled -       Issues a polling command
 911  * @instance:                   Adapter soft state
 912  * @cmd:                        Command packet to be issued
 913  *
 914  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
 915  */
 916 int
 917 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
 918 {
 919         int seconds;
 920
 921         struct megasas_header *frame_hdr = &cmd->frame->hdr;
 922
 923         frame_hdr->cmd_status = MFI_CMD_STATUS_POLL_MODE;
 924         frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
 925
 926         /*
 927          * Issue the frame using inbound queue port
 928          */
 929         instance->instancet->issue_dcmd(instance, cmd);
 930
 931         /*
 932          * Wait for cmd_status to change
 933          */
 934         if (instance->requestorId)
 935                 seconds = MEGASAS_ROUTINE_WAIT_TIME_VF;
 936         else
 937                 seconds = MFI_POLL_TIMEOUT_SECS;
 938         return wait_and_poll(instance, cmd, seconds);
 939 }
 940
 941 /**
 942  * megasas_issue_blocked_cmd -  Synchronous wrapper around regular FW cmds
 943  * @instance:                   Adapter soft state
 944  * @cmd:                        Command to be issued
 945  * @timeout:                    Timeout in seconds
 946  *
 947  * This function waits on an event for the command to be returned from ISR.
 948  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
 949  * Used to issue ioctl commands.
 950  */
 951 int
 952 megasas_issue_blocked_cmd(struct megasas_instance *instance,
 953                           struct megasas_cmd *cmd, int timeout)
 954 {
 955         int ret = 0;
 956         cmd->cmd_status = ENODATA;
 957
 958         cmd->is_wait_event = 1;
 959         instance->instancet->issue_dcmd(instance, cmd);
 960         if (timeout) {
 961                 ret = wait_event_timeout(instance->int_cmd_wait_q,
 962                                 cmd->cmd_status != ENODATA, timeout * HZ);
 963                 if (!ret)
 964                         return 1;
 965         } else
 966                 wait_event(instance->int_cmd_wait_q,
 967                                 cmd->cmd_status != ENODATA);
 968
 969         return 0;
 970 }
 971
 972 /**
 973  * megasas_issue_blocked_abort_cmd -    Aborts previously issued cmd
 974  * @instance:                           Adapter soft state
 975  * @cmd_to_abort:                       Previously issued cmd to be aborted
 976  * @timeout:                            Timeout in seconds
 977  *
 978  * MFI firmware can abort previously issued AEN comamnd (automatic event
 979  * notification). The megasas_issue_blocked_abort_cmd() issues such abort
 980  * cmd and waits for return status.
 981  * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
 982  */
 983 static int
 984 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
 985                                 struct megasas_cmd *cmd_to_abort, int timeout)
 986 {
 987         struct megasas_cmd *cmd;
 988         struct megasas_abort_frame *abort_fr;
 989         int ret = 0;
 990
 991         cmd = megasas_get_cmd(instance);
 992
 993         if (!cmd)
 994                 return -1;
 995
 996         abort_fr = &cmd->frame->abort;
 997
 998         /*
 999          * Prepare and issue the abort frame
1000          */
1001         abort_fr->cmd = MFI_CMD_ABORT;
1002         abort_fr->cmd_status = 0xFF;
1003         abort_fr->flags = cpu_to_le16(0);
1004         abort_fr->abort_context = cpu_to_le32(cmd_to_abort->index);
1005         abort_fr->abort_mfi_phys_addr_lo =
1006                 cpu_to_le32(lower_32_bits(cmd_to_abort->frame_phys_addr));
1007         abort_fr->abort_mfi_phys_addr_hi =
1008                 cpu_to_le32(upper_32_bits(cmd_to_abort->frame_phys_addr));
1009
1010         cmd->sync_cmd = 1;
1011         cmd->cmd_status = 0xFF;
1012
1013         instance->instancet->issue_dcmd(instance, cmd);
1014
1015         if (timeout) {
1016                 ret = wait_event_timeout(instance->abort_cmd_wait_q,
1017                                 cmd->cmd_status != ENODATA, timeout * HZ);
1018                 if (!ret) {
1019                         dev_err(&instance->pdev->dev, "Command timedout"
1020                                 "from %s\n", __func__);
1021                         return 1;
1022                 }
1023         } else
1024                 wait_event(instance->abort_cmd_wait_q,
1025                                 cmd->cmd_status != ENODATA);
1026
1027         cmd->sync_cmd = 0;
1028
1029         megasas_return_cmd(instance, cmd);
1030         return 0;
1031 }
1032
1033 /**
1034  * megasas_make_sgl32 - Prepares 32-bit SGL
1035  * @instance:           Adapter soft state
1036  * @scp:                SCSI command from the mid-layer
1037  * @mfi_sgl:            SGL to be filled in
1038  *
1039  * If successful, this function returns the number of SG elements. Otherwise,
1040  * it returnes -1.
1041  */
1042 static int
1043 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
1044                    union megasas_sgl *mfi_sgl)
1045 {
1046         int i;
1047         int sge_count;
1048         struct scatterlist *os_sgl;
1049
1050         sge_count = scsi_dma_map(scp);
1051         BUG_ON(sge_count < 0);
1052
1053         if (sge_count) {
1054                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1055                         mfi_sgl->sge32[i].length = cpu_to_le32(sg_dma_len(os_sgl));
1056                         mfi_sgl->sge32[i].phys_addr = cpu_to_le32(sg_dma_address(os_sgl));
1057                 }
1058         }
1059         return sge_count;
1060 }
1061
1062 /**
1063  * megasas_make_sgl64 - Prepares 64-bit SGL
1064  * @instance:           Adapter soft state
1065  * @scp:                SCSI command from the mid-layer
1066  * @mfi_sgl:            SGL to be filled in
1067  *
1068  * If successful, this function returns the number of SG elements. Otherwise,
1069  * it returnes -1.
1070  */
1071 static int
1072 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
1073                    union megasas_sgl *mfi_sgl)
1074 {
1075         int i;
1076         int sge_count;
1077         struct scatterlist *os_sgl;
1078
1079         sge_count = scsi_dma_map(scp);
1080         BUG_ON(sge_count < 0);
1081
1082         if (sge_count) {
1083                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1084                         mfi_sgl->sge64[i].length = cpu_to_le32(sg_dma_len(os_sgl));
1085                         mfi_sgl->sge64[i].phys_addr = cpu_to_le64(sg_dma_address(os_sgl));
1086                 }
1087         }
1088         return sge_count;
1089 }
1090
1091 /**
1092  * megasas_make_sgl_skinny - Prepares IEEE SGL
1093  * @instance:           Adapter soft state
1094  * @scp:                SCSI command from the mid-layer
1095  * @mfi_sgl:            SGL to be filled in
1096  *
1097  * If successful, this function returns the number of SG elements. Otherwise,
1098  * it returnes -1.
1099  */
1100 static int
1101 megasas_make_sgl_skinny(struct megasas_instance *instance,
1102                 struct scsi_cmnd *scp, union megasas_sgl *mfi_sgl)
1103 {
1104         int i;
1105         int sge_count;
1106         struct scatterlist *os_sgl;
1107
1108         sge_count = scsi_dma_map(scp);
1109
1110         if (sge_count) {
1111                 scsi_for_each_sg(scp, os_sgl, sge_count, i) {
1112                         mfi_sgl->sge_skinny[i].length =
1113                                 cpu_to_le32(sg_dma_len(os_sgl));
1114                         mfi_sgl->sge_skinny[i].phys_addr =
1115                                 cpu_to_le64(sg_dma_address(os_sgl));
1116                         mfi_sgl->sge_skinny[i].flag = cpu_to_le32(0);
1117                 }
1118         }
1119         return sge_count;
1120 }
1121
1122  /**
1123  * megasas_get_frame_count - Computes the number of frames
1124  * @frame_type          : type of frame- io or pthru frame
1125  * @sge_count           : number of sg elements
1126  *
1127  * Returns the number of frames required for numnber of sge's (sge_count)
1128  */
1129
1130 static u32 megasas_get_frame_count(struct megasas_instance *instance,
1131                         u8 sge_count, u8 frame_type)
1132 {
1133         int num_cnt;
1134         int sge_bytes;
1135         u32 sge_sz;
1136         u32 frame_count=0;
1137
1138         sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1139             sizeof(struct megasas_sge32);
1140
1141         if (instance->flag_ieee) {
1142                 sge_sz = sizeof(struct megasas_sge_skinny);
1143         }
1144
1145         /*
1146          * Main frame can contain 2 SGEs for 64-bit SGLs and
1147          * 3 SGEs for 32-bit SGLs for ldio &
1148          * 1 SGEs for 64-bit SGLs and
1149          * 2 SGEs for 32-bit SGLs for pthru frame
1150          */
1151         if (unlikely(frame_type == PTHRU_FRAME)) {
1152                 if (instance->flag_ieee == 1) {
1153                         num_cnt = sge_count - 1;
1154                 } else if (IS_DMA64)
1155                         num_cnt = sge_count - 1;
1156                 else
1157                         num_cnt = sge_count - 2;
1158         } else {
1159                 if (instance->flag_ieee == 1) {
1160                         num_cnt = sge_count - 1;
1161                 } else if (IS_DMA64)
1162                         num_cnt = sge_count - 2;
1163                 else
1164                         num_cnt = sge_count - 3;
1165         }
1166
1167         if(num_cnt>0){
1168                 sge_bytes = sge_sz * num_cnt;
1169
1170                 frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
1171                     ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
1172         }
1173         /* Main frame */
1174         frame_count +=1;
1175
1176         if (frame_count > 7)
1177                 frame_count = 8;
1178         return frame_count;
1179 }
1180
1181 /**
1182  * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
1183  * @instance:           Adapter soft state
1184  * @scp:                SCSI command
1185  * @cmd:                Command to be prepared in
1186  *
1187  * This function prepares CDB commands. These are typcially pass-through
1188  * commands to the devices.
1189  */
1190 static int
1191 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
1192                    struct megasas_cmd *cmd)
1193 {
1194         u32 is_logical;
1195         u32 device_id;
1196         u16 flags = 0;
1197         struct megasas_pthru_frame *pthru;
1198
1199         is_logical = MEGASAS_IS_LOGICAL(scp);
1200         device_id = MEGASAS_DEV_INDEX(instance, scp);
1201         pthru = (struct megasas_pthru_frame *)cmd->frame;
1202
1203         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1204                 flags = MFI_FRAME_DIR_WRITE;
1205         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1206                 flags = MFI_FRAME_DIR_READ;
1207         else if (scp->sc_data_direction == PCI_DMA_NONE)
1208                 flags = MFI_FRAME_DIR_NONE;
1209
1210         if (instance->flag_ieee == 1) {
1211                 flags |= MFI_FRAME_IEEE;
1212         }
1213
1214         /*
1215          * Prepare the DCDB frame
1216          */
1217         pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
1218         pthru->cmd_status = 0x0;
1219         pthru->scsi_status = 0x0;
1220         pthru->target_id = device_id;
1221         pthru->lun = scp->device->lun;
1222         pthru->cdb_len = scp->cmd_len;
1223         pthru->timeout = 0;
1224         pthru->pad_0 = 0;
1225         pthru->flags = cpu_to_le16(flags);
1226         pthru->data_xfer_len = cpu_to_le32(scsi_bufflen(scp));
1227
1228         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1229
1230         /*
1231         * If the command is for the tape device, set the
1232         * pthru timeout to the os layer timeout value.
1233         */
1234         if (scp->device->type == TYPE_TAPE) {
1235                 if ((scp->request->timeout / HZ) > 0xFFFF)
1236                         pthru->timeout = 0xFFFF;
1237                 else
1238                         pthru->timeout = cpu_to_le16(scp->request->timeout / HZ);
1239         }
1240
1241         /*
1242          * Construct SGL
1243          */
1244         if (instance->flag_ieee == 1) {
1245                 pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1246                 pthru->sge_count = megasas_make_sgl_skinny(instance, scp,
1247                                                       &pthru->sgl);
1248         } else if (IS_DMA64) {
1249                 pthru->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1250                 pthru->sge_count = megasas_make_sgl64(instance, scp,
1251                                                       &pthru->sgl);
1252         } else
1253                 pthru->sge_count = megasas_make_sgl32(instance, scp,
1254                                                       &pthru->sgl);
1255
1256         if (pthru->sge_count > instance->max_num_sge) {
1257                 printk(KERN_ERR "megasas: DCDB two many SGE NUM=%x\n",
1258                         pthru->sge_count);
1259                 return 0;
1260         }
1261
1262         /*
1263          * Sense info specific
1264          */
1265         pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
1266         pthru->sense_buf_phys_addr_hi =
1267                 cpu_to_le32(upper_32_bits(cmd->sense_phys_addr));
1268         pthru->sense_buf_phys_addr_lo =
1269                 cpu_to_le32(lower_32_bits(cmd->sense_phys_addr));
1270
1271         /*
1272          * Compute the total number of frames this command consumes. FW uses
1273          * this number to pull sufficient number of frames from host memory.
1274          */
1275         cmd->frame_count = megasas_get_frame_count(instance, pthru->sge_count,
1276                                                         PTHRU_FRAME);
1277
1278         return cmd->frame_count;
1279 }
1280
1281 /**
1282  * megasas_build_ldio - Prepares IOs to logical devices
1283  * @instance:           Adapter soft state
1284  * @scp:                SCSI command
1285  * @cmd:                Command to be prepared
1286  *
1287  * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
1288  */
1289 static int
1290 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
1291                    struct megasas_cmd *cmd)
1292 {
1293         u32 device_id;
1294         u8 sc = scp->cmnd[0];
1295         u16 flags = 0;
1296         struct megasas_io_frame *ldio;
1297
1298         device_id = MEGASAS_DEV_INDEX(instance, scp);
1299         ldio = (struct megasas_io_frame *)cmd->frame;
1300
1301         if (scp->sc_data_direction == PCI_DMA_TODEVICE)
1302                 flags = MFI_FRAME_DIR_WRITE;
1303         else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
1304                 flags = MFI_FRAME_DIR_READ;
1305
1306         if (instance->flag_ieee == 1) {
1307                 flags |= MFI_FRAME_IEEE;
1308         }
1309
1310         /*
1311          * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
1312          */
1313         ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
1314         ldio->cmd_status = 0x0;
1315         ldio->scsi_status = 0x0;
1316         ldio->target_id = device_id;
1317         ldio->timeout = 0;
1318         ldio->reserved_0 = 0;
1319         ldio->pad_0 = 0;
1320         ldio->flags = cpu_to_le16(flags);
1321         ldio->start_lba_hi = 0;
1322         ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
1323
1324         /*
1325          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1326          */
1327         if (scp->cmd_len == 6) {
1328                 ldio->lba_count = cpu_to_le32((u32) scp->cmnd[4]);
1329                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[1] << 16) |
1330                                                  ((u32) scp->cmnd[2] << 8) |
1331                                                  (u32) scp->cmnd[3]);
1332
1333                 ldio->start_lba_lo &= cpu_to_le32(0x1FFFFF);
1334         }
1335
1336         /*
1337          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1338          */
1339         else if (scp->cmd_len == 10) {
1340                 ldio->lba_count = cpu_to_le32((u32) scp->cmnd[8] |
1341                                               ((u32) scp->cmnd[7] << 8));
1342                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1343                                                  ((u32) scp->cmnd[3] << 16) |
1344                                                  ((u32) scp->cmnd[4] << 8) |
1345                                                  (u32) scp->cmnd[5]);
1346         }
1347
1348         /*
1349          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1350          */
1351         else if (scp->cmd_len == 12) {
1352                 ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
1353                                               ((u32) scp->cmnd[7] << 16) |
1354                                               ((u32) scp->cmnd[8] << 8) |
1355                                               (u32) scp->cmnd[9]);
1356
1357                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1358                                                  ((u32) scp->cmnd[3] << 16) |
1359                                                  ((u32) scp->cmnd[4] << 8) |
1360                                                  (u32) scp->cmnd[5]);
1361         }
1362
1363         /*
1364          * 16-byte READ(0x88) or WRITE(0x8A) cdb
1365          */
1366         else if (scp->cmd_len == 16) {
1367                 ldio->lba_count = cpu_to_le32(((u32) scp->cmnd[10] << 24) |
1368                                               ((u32) scp->cmnd[11] << 16) |
1369                                               ((u32) scp->cmnd[12] << 8) |
1370                                               (u32) scp->cmnd[13]);
1371
1372                 ldio->start_lba_lo = cpu_to_le32(((u32) scp->cmnd[6] << 24) |
1373                                                  ((u32) scp->cmnd[7] << 16) |
1374                                                  ((u32) scp->cmnd[8] << 8) |
1375                                                  (u32) scp->cmnd[9]);
1376
1377                 ldio->start_lba_hi = cpu_to_le32(((u32) scp->cmnd[2] << 24) |
1378                                                  ((u32) scp->cmnd[3] << 16) |
1379                                                  ((u32) scp->cmnd[4] << 8) |
1380                                                  (u32) scp->cmnd[5]);
1381
1382         }
1383
1384         /*
1385          * Construct SGL
1386          */
1387         if (instance->flag_ieee) {
1388                 ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1389                 ldio->sge_count = megasas_make_sgl_skinny(instance, scp,
1390                                               &ldio->sgl);
1391         } else if (IS_DMA64) {
1392                 ldio->flags |= cpu_to_le16(MFI_FRAME_SGL64);
1393                 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
1394         } else
1395                 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
1396
1397         if (ldio->sge_count > instance->max_num_sge) {
1398                 printk(KERN_ERR "megasas: build_ld_io: sge_count = %x\n",
1399                         ldio->sge_count);
1400                 return 0;
1401         }
1402
1403         /*
1404          * Sense info specific
1405          */
1406         ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
1407         ldio->sense_buf_phys_addr_hi = 0;
1408         ldio->sense_buf_phys_addr_lo = cpu_to_le32(cmd->sense_phys_addr);
1409
1410         /*
1411          * Compute the total number of frames this command consumes. FW uses
1412          * this number to pull sufficient number of frames from host memory.
1413          */
1414         cmd->frame_count = megasas_get_frame_count(instance,
1415                         ldio->sge_count, IO_FRAME);
1416
1417         return cmd->frame_count;
1418 }
1419
1420 /**
1421  * megasas_is_ldio -            Checks if the cmd is for logical drive
1422  * @scmd:                       SCSI command
1423  *
1424  * Called by megasas_queue_command to find out if the command to be queued
1425  * is a logical drive command
1426  */
1427 inline int megasas_is_ldio(struct scsi_cmnd *cmd)
1428 {
1429         if (!MEGASAS_IS_LOGICAL(cmd))
1430                 return 0;
1431         switch (cmd->cmnd[0]) {
1432         case READ_10:
1433         case WRITE_10:
1434         case READ_12:
1435         case WRITE_12:
1436         case READ_6:
1437         case WRITE_6:
1438         case READ_16:
1439         case WRITE_16:
1440                 return 1;
1441         default:
1442                 return 0;
1443         }
1444 }
1445
1446  /**
1447  * megasas_dump_pending_frames -        Dumps the frame address of all pending cmds
1448  *                                      in FW
1449  * @instance:                           Adapter soft state
1450  */
1451 static inline void
1452 megasas_dump_pending_frames(struct megasas_instance *instance)
1453 {
1454         struct megasas_cmd *cmd;
1455         int i,n;
1456         union megasas_sgl *mfi_sgl;
1457         struct megasas_io_frame *ldio;
1458         struct megasas_pthru_frame *pthru;
1459         u32 sgcount;
1460         u32 max_cmd = instance->max_fw_cmds;
1461
1462         printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
1463         printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
1464         if (IS_DMA64)
1465                 printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
1466         else
1467                 printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
1468
1469         printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
1470         for (i = 0; i < max_cmd; i++) {
1471                 cmd = instance->cmd_list[i];
1472                 if(!cmd->scmd)
1473                         continue;
1474                 printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
1475                 if (megasas_is_ldio(cmd->scmd)){
1476                         ldio = (struct megasas_io_frame *)cmd->frame;
1477                         mfi_sgl = &ldio->sgl;
1478                         sgcount = ldio->sge_count;
1479                         printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x,"
1480                         " lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
1481                         instance->host->host_no, cmd->frame_count, ldio->cmd, ldio->target_id,
1482                         le32_to_cpu(ldio->start_lba_lo), le32_to_cpu(ldio->start_lba_hi),
1483                         le32_to_cpu(ldio->sense_buf_phys_addr_lo), sgcount);
1484                 }
1485                 else {
1486                         pthru = (struct megasas_pthru_frame *) cmd->frame;
1487                         mfi_sgl = &pthru->sgl;
1488                         sgcount = pthru->sge_count;
1489                         printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, "
1490                         "lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",
1491                         instance->host->host_no, cmd->frame_count, pthru->cmd, pthru->target_id,
1492                         pthru->lun, pthru->cdb_len, le32_to_cpu(pthru->data_xfer_len),
1493                         le32_to_cpu(pthru->sense_buf_phys_addr_lo), sgcount);
1494                 }
1495         if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
1496                 for (n = 0; n < sgcount; n++){
1497                         if (IS_DMA64)
1498                                 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%llx ",
1499                                         le32_to_cpu(mfi_sgl->sge64[n].length),
1500                                         le64_to_cpu(mfi_sgl->sge64[n].phys_addr));
1501                         else
1502                                 printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",
1503                                         le32_to_cpu(mfi_sgl->sge32[n].length),
1504                                         le32_to_cpu(mfi_sgl->sge32[n].phys_addr));
1505                         }
1506                 }
1507                 printk(KERN_ERR "\n");
1508         } /*for max_cmd*/
1509         printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
1510         for (i = 0; i < max_cmd; i++) {
1511
1512                 cmd = instance->cmd_list[i];
1513
1514                 if(cmd->sync_cmd == 1){
1515                         printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
1516                 }
1517         }
1518         printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
1519 }
1520
1521 u32
1522 megasas_build_and_issue_cmd(struct megasas_instance *instance,
1523                             struct scsi_cmnd *scmd)
1524 {
1525         struct megasas_cmd *cmd;
1526         u32 frame_count;
1527
1528         cmd = megasas_get_cmd(instance);
1529         if (!cmd)
1530                 return SCSI_MLQUEUE_HOST_BUSY;
1531
1532         /*
1533          * Logical drive command
1534          */
1535         if (megasas_is_ldio(scmd))
1536                 frame_count = megasas_build_ldio(instance, scmd, cmd);
1537         else
1538                 frame_count = megasas_build_dcdb(instance, scmd, cmd);
1539
1540         if (!frame_count)
1541                 goto out_return_cmd;
1542
1543         cmd->scmd = scmd;
1544         scmd->SCp.ptr = (char *)cmd;
1545
1546         /*
1547          * Issue the command to the FW
1548          */
1549         atomic_inc(&instance->fw_outstanding);
1550
1551         instance->instancet->fire_cmd(instance, cmd->frame_phys_addr,
1552                                 cmd->frame_count-1, instance->reg_set);
1553
1554         return 0;
1555 out_return_cmd:
1556         megasas_return_cmd(instance, cmd);
1557         return 1;
1558 }
1559
1560
1561 /**
1562  * megasas_queue_command -      Queue entry point
1563  * @scmd:                       SCSI command to be queued
1564  * @done:                       Callback entry point
1565  */
1566 static int
1567 megasas_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
1568 {
1569         struct megasas_instance *instance;
1570         unsigned long flags;
1571
1572         instance = (struct megasas_instance *)
1573             scmd->device->host->hostdata;
1574
1575         if (instance->issuepend_done == 0)
1576                 return SCSI_MLQUEUE_HOST_BUSY;
1577
1578         spin_lock_irqsave(&instance->hba_lock, flags);
1579
1580         /* Check for an mpio path and adjust behavior */
1581         if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
1582                 if (megasas_check_mpio_paths(instance, scmd) ==
1583                     (DID_RESET << 16)) {
1584                         spin_unlock_irqrestore(&instance->hba_lock, flags);
1585                         return SCSI_MLQUEUE_HOST_BUSY;
1586                 } else {
1587                         spin_unlock_irqrestore(&instance->hba_lock, flags);
1588                         scmd->result = DID_NO_CONNECT << 16;
1589                         scmd->scsi_done(scmd);
1590                         return 0;
1591                 }
1592         }
1593
1594         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
1595                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1596                 scmd->result = DID_NO_CONNECT << 16;
1597                 scmd->scsi_done(scmd);
1598                 return 0;
1599         }
1600
1601         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
1602                 spin_unlock_irqrestore(&instance->hba_lock, flags);
1603                 return SCSI_MLQUEUE_HOST_BUSY;
1604         }
1605
1606         spin_unlock_irqrestore(&instance->hba_lock, flags);
1607
1608         scmd->result = 0;
1609
1610         if (MEGASAS_IS_LOGICAL(scmd) &&
1611             (scmd->device->id >= instance->fw_supported_vd_count ||
1612                 scmd->device->lun)) {
1613                 scmd->result = DID_BAD_TARGET << 16;
1614                 goto out_done;
1615         }
1616
1617         switch (scmd->cmnd[0]) {
1618         case SYNCHRONIZE_CACHE:
1619                 /*
1620                  * FW takes care of flush cache on its own
1621                  * No need to send it down
1622                  */
1623                 scmd->result = DID_OK << 16;
1624                 goto out_done;
1625         default:
1626                 break;
1627         }
1628
1629         if (instance->instancet->build_and_issue_cmd(instance, scmd)) {
1630                 printk(KERN_ERR "megasas: Err returned from build_and_issue_cmd\n");
1631                 return SCSI_MLQUEUE_HOST_BUSY;
1632         }
1633
1634         return 0;
1635
1636  out_done:
1637         scmd->scsi_done(scmd);
1638         return 0;
1639 }
1640
1641 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
1642 {
1643         int i;
1644
1645         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
1646
1647                 if ((megasas_mgmt_info.instance[i]) &&
1648                     (megasas_mgmt_info.instance[i]->host->host_no == host_no))
1649                         return megasas_mgmt_info.instance[i];
1650         }
1651
1652         return NULL;
1653 }
1654
1655 static int megasas_slave_configure(struct scsi_device *sdev)
1656 {
1657         /*
1658         * The RAID firmware may require extended timeouts.
1659         */
1660         blk_queue_rq_timeout(sdev->request_queue,
1661                 MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
1662
1663         return 0;
1664 }
1665
1666 static int megasas_slave_alloc(struct scsi_device *sdev)
1667 {
1668         u16             pd_index = 0;
1669         struct megasas_instance *instance ;
1670         instance = megasas_lookup_instance(sdev->host->host_no);
1671         if (sdev->channel < MEGASAS_MAX_PD_CHANNELS) {
1672                 /*
1673                  * Open the OS scan to the SYSTEM PD
1674                  */
1675                 pd_index =
1676                         (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
1677                         sdev->id;
1678                 if (instance->pd_list[pd_index].driveState ==
1679                                         MR_PD_STATE_SYSTEM) {
1680                         return 0;
1681                 }
1682                 return -ENXIO;
1683         }
1684         return 0;
1685 }
1686
1687 void megaraid_sas_kill_hba(struct megasas_instance *instance)
1688 {
1689         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
1690             (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
1691             (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
1692             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
1693             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
1694             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
1695                 writel(MFI_STOP_ADP, &instance->reg_set->doorbell);
1696                 /* Flush */
1697                 readl(&instance->reg_set->doorbell);
1698                 if (instance->mpio && instance->requestorId)
1699                         memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
1700         } else {
1701                 writel(MFI_STOP_ADP, &instance->reg_set->inbound_doorbell);
1702         }
1703 }
1704
1705  /**
1706   * megasas_check_and_restore_queue_depth - Check if queue depth needs to be
1707   *                                     restored to max value
1708   * @instance:                  Adapter soft state
1709   *
1710   */
1711 void
1712 megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
1713 {
1714         unsigned long flags;
1715         if (instance->flag & MEGASAS_FW_BUSY
1716             && time_after(jiffies, instance->last_time + 5 * HZ)
1717             && atomic_read(&instance->fw_outstanding) <
1718             instance->throttlequeuedepth + 1) {
1719
1720                 spin_lock_irqsave(instance->host->host_lock, flags);
1721                 instance->flag &= ~MEGASAS_FW_BUSY;
1722                 if (instance->is_imr) {
1723                         instance->host->can_queue =
1724                                 instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
1725                 } else
1726                         instance->host->can_queue =
1727                                 instance->max_fw_cmds - MEGASAS_INT_CMDS;
1728
1729                 spin_unlock_irqrestore(instance->host->host_lock, flags);
1730         }
1731 }
1732
1733 /**
1734  * megasas_complete_cmd_dpc      -      Returns FW's controller structure
1735  * @instance_addr:                      Address of adapter soft state
1736  *
1737  * Tasklet to complete cmds
1738  */
1739 static void megasas_complete_cmd_dpc(unsigned long instance_addr)
1740 {
1741         u32 producer;
1742         u32 consumer;
1743         u32 context;
1744         struct megasas_cmd *cmd;
1745         struct megasas_instance *instance =
1746                                 (struct megasas_instance *)instance_addr;
1747         unsigned long flags;
1748
1749         /* If we have already declared adapter dead, donot complete cmds */
1750         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR )
1751                 return;
1752
1753         spin_lock_irqsave(&instance->completion_lock, flags);
1754
1755         producer = le32_to_cpu(*instance->producer);
1756         consumer = le32_to_cpu(*instance->consumer);
1757
1758         while (consumer != producer) {
1759                 context = le32_to_cpu(instance->reply_queue[consumer]);
1760                 if (context >= instance->max_fw_cmds) {
1761                         printk(KERN_ERR "Unexpected context value %x\n",
1762                                 context);
1763                         BUG();
1764                 }
1765
1766                 cmd = instance->cmd_list[context];
1767
1768                 megasas_complete_cmd(instance, cmd, DID_OK);
1769
1770                 consumer++;
1771                 if (consumer == (instance->max_fw_cmds + 1)) {
1772                         consumer = 0;
1773                 }
1774         }
1775
1776         *instance->consumer = cpu_to_le32(producer);
1777
1778         spin_unlock_irqrestore(&instance->completion_lock, flags);
1779
1780         /*
1781          * Check if we can restore can_queue
1782          */
1783         megasas_check_and_restore_queue_depth(instance);
1784 }
1785
1786 /**
1787  * megasas_start_timer - Initializes a timer object
1788  * @instance:           Adapter soft state
1789  * @timer:              timer object to be initialized
1790  * @fn:                 timer function
1791  * @interval:           time interval between timer function call
1792  *
1793  */
1794 void megasas_start_timer(struct megasas_instance *instance,
1795                         struct timer_list *timer,
1796                         void *fn, unsigned long interval)
1797 {
1798         init_timer(timer);
1799         timer->expires = jiffies + interval;
1800         timer->data = (unsigned long)instance;
1801         timer->function = fn;
1802         add_timer(timer);
1803 }
1804
1805 static void
1806 megasas_internal_reset_defer_cmds(struct megasas_instance *instance);
1807
1808 static void
1809 process_fw_state_change_wq(struct work_struct *work);
1810
1811 void megasas_do_ocr(struct megasas_instance *instance)
1812 {
1813         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
1814         (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
1815         (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
1816                 *instance->consumer = cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
1817         }
1818         instance->instancet->disable_intr(instance);
1819         instance->adprecovery   = MEGASAS_ADPRESET_SM_INFAULT;
1820         instance->issuepend_done = 0;
1821
1822         atomic_set(&instance->fw_outstanding, 0);
1823         megasas_internal_reset_defer_cmds(instance);
1824         process_fw_state_change_wq(&instance->work_init);
1825 }
1826
1827 static int megasas_get_ld_vf_affiliation_111(struct megasas_instance *instance,
1828                                             int initial)
1829 {
1830         struct megasas_cmd *cmd;
1831         struct megasas_dcmd_frame *dcmd;
1832         struct MR_LD_VF_AFFILIATION_111 *new_affiliation_111 = NULL;
1833         dma_addr_t new_affiliation_111_h;
1834         int ld, retval = 0;
1835         u8 thisVf;
1836
1837         cmd = megasas_get_cmd(instance);
1838
1839         if (!cmd) {
1840                 printk(KERN_DEBUG "megasas: megasas_get_ld_vf_affiliation_111:"
1841                        "Failed to get cmd for scsi%d.\n",
1842                         instance->host->host_no);
1843                 return -ENOMEM;
1844         }
1845
1846         dcmd = &cmd->frame->dcmd;
1847
1848         if (!instance->vf_affiliation_111) {
1849                 printk(KERN_WARNING "megasas: SR-IOV: Couldn't get LD/VF "
1850                        "affiliation for scsi%d.\n", instance->host->host_no);
1851                 megasas_return_cmd(instance, cmd);
1852                 return -ENOMEM;
1853         }
1854
1855         if (initial)
1856                         memset(instance->vf_affiliation_111, 0,
1857                                sizeof(struct MR_LD_VF_AFFILIATION_111));
1858         else {
1859                 new_affiliation_111 =
1860                         pci_alloc_consistent(instance->pdev,
1861                                              sizeof(struct MR_LD_VF_AFFILIATION_111),
1862                                              &new_affiliation_111_h);
1863                 if (!new_affiliation_111) {
1864                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate "
1865                                "memory for new affiliation for scsi%d.\n",
1866                                instance->host->host_no);
1867                         megasas_return_cmd(instance, cmd);
1868                         return -ENOMEM;
1869                 }
1870                 memset(new_affiliation_111, 0,
1871                        sizeof(struct MR_LD_VF_AFFILIATION_111));
1872         }
1873
1874         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1875
1876         dcmd->cmd = MFI_CMD_DCMD;
1877         dcmd->cmd_status = 0xFF;
1878         dcmd->sge_count = 1;
1879         dcmd->flags = MFI_FRAME_DIR_BOTH;
1880         dcmd->timeout = 0;
1881         dcmd->pad_0 = 0;
1882         dcmd->data_xfer_len = sizeof(struct MR_LD_VF_AFFILIATION_111);
1883         dcmd->opcode = MR_DCMD_LD_VF_MAP_GET_ALL_LDS_111;
1884
1885         if (initial)
1886                 dcmd->sgl.sge32[0].phys_addr =
1887                         instance->vf_affiliation_111_h;
1888         else
1889                 dcmd->sgl.sge32[0].phys_addr = new_affiliation_111_h;
1890
1891         dcmd->sgl.sge32[0].length =
1892                 sizeof(struct MR_LD_VF_AFFILIATION_111);
1893
1894         printk(KERN_WARNING "megasas: SR-IOV: Getting LD/VF affiliation for "
1895                "scsi%d\n", instance->host->host_no);
1896
1897         megasas_issue_blocked_cmd(instance, cmd, 0);
1898
1899         if (dcmd->cmd_status) {
1900                 printk(KERN_WARNING "megasas: SR-IOV: LD/VF affiliation DCMD"
1901                        " failed with status 0x%x for scsi%d.\n",
1902                        dcmd->cmd_status, instance->host->host_no);
1903                 retval = 1; /* Do a scan if we couldn't get affiliation */
1904                 goto out;
1905         }
1906
1907         if (!initial) {
1908                 thisVf = new_affiliation_111->thisVf;
1909                 for (ld = 0 ; ld < new_affiliation_111->vdCount; ld++)
1910                         if (instance->vf_affiliation_111->map[ld].policy[thisVf] !=
1911                             new_affiliation_111->map[ld].policy[thisVf]) {
1912                                 printk(KERN_WARNING "megasas: SR-IOV: "
1913                                        "Got new LD/VF affiliation "
1914                                        "for scsi%d.\n",
1915                                        instance->host->host_no);
1916                                 memcpy(instance->vf_affiliation_111,
1917                                        new_affiliation_111,
1918                                        sizeof(struct MR_LD_VF_AFFILIATION_111));
1919                                 retval = 1;
1920                                 goto out;
1921                         }
1922         }
1923 out:
1924         if (new_affiliation_111) {
1925                 pci_free_consistent(instance->pdev,
1926                                     sizeof(struct MR_LD_VF_AFFILIATION_111),
1927                                     new_affiliation_111,
1928                                     new_affiliation_111_h);
1929         }
1930
1931         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
1932                 megasas_return_mfi_mpt_pthr(instance, cmd,
1933                         cmd->mpt_pthr_cmd_blocked);
1934         else
1935                 megasas_return_cmd(instance, cmd);
1936
1937         return retval;
1938 }
1939
1940 static int megasas_get_ld_vf_affiliation_12(struct megasas_instance *instance,
1941                                             int initial)
1942 {
1943         struct megasas_cmd *cmd;
1944         struct megasas_dcmd_frame *dcmd;
1945         struct MR_LD_VF_AFFILIATION *new_affiliation = NULL;
1946         struct MR_LD_VF_MAP *newmap = NULL, *savedmap = NULL;
1947         dma_addr_t new_affiliation_h;
1948         int i, j, retval = 0, found = 0, doscan = 0;
1949         u8 thisVf;
1950
1951         cmd = megasas_get_cmd(instance);
1952
1953         if (!cmd) {
1954                 printk(KERN_DEBUG "megasas: megasas_get_ld_vf_affiliation12: "
1955                        "Failed to get cmd for scsi%d.\n",
1956                        instance->host->host_no);
1957                 return -ENOMEM;
1958         }
1959
1960         dcmd = &cmd->frame->dcmd;
1961
1962         if (!instance->vf_affiliation) {
1963                 printk(KERN_WARNING "megasas: SR-IOV: Couldn't get LD/VF "
1964                        "affiliation for scsi%d.\n", instance->host->host_no);
1965                 megasas_return_cmd(instance, cmd);
1966                 return -ENOMEM;
1967         }
1968
1969         if (initial)
1970                 memset(instance->vf_affiliation, 0, (MAX_LOGICAL_DRIVES + 1) *
1971                        sizeof(struct MR_LD_VF_AFFILIATION));
1972         else {
1973                 new_affiliation =
1974                         pci_alloc_consistent(instance->pdev,
1975                                              (MAX_LOGICAL_DRIVES + 1) *
1976                                              sizeof(struct MR_LD_VF_AFFILIATION),
1977                                              &new_affiliation_h);
1978                 if (!new_affiliation) {
1979                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate "
1980                                "memory for new affiliation for scsi%d.\n",
1981                                instance->host->host_no);
1982                         megasas_return_cmd(instance, cmd);
1983                         return -ENOMEM;
1984                 }
1985                 memset(new_affiliation, 0, (MAX_LOGICAL_DRIVES + 1) *
1986                        sizeof(struct MR_LD_VF_AFFILIATION));
1987         }
1988
1989         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1990
1991         dcmd->cmd = MFI_CMD_DCMD;
1992         dcmd->cmd_status = 0xFF;
1993         dcmd->sge_count = 1;
1994         dcmd->flags = MFI_FRAME_DIR_BOTH;
1995         dcmd->timeout = 0;
1996         dcmd->pad_0 = 0;
1997         dcmd->data_xfer_len = (MAX_LOGICAL_DRIVES + 1) *
1998                 sizeof(struct MR_LD_VF_AFFILIATION);
1999         dcmd->opcode = MR_DCMD_LD_VF_MAP_GET_ALL_LDS;
2000
2001         if (initial)
2002                 dcmd->sgl.sge32[0].phys_addr = instance->vf_affiliation_h;
2003         else
2004                 dcmd->sgl.sge32[0].phys_addr = new_affiliation_h;
2005
2006         dcmd->sgl.sge32[0].length = (MAX_LOGICAL_DRIVES + 1) *
2007                 sizeof(struct MR_LD_VF_AFFILIATION);
2008
2009         printk(KERN_WARNING "megasas: SR-IOV: Getting LD/VF affiliation for "
2010                "scsi%d\n", instance->host->host_no);
2011
2012         megasas_issue_blocked_cmd(instance, cmd, 0);
2013
2014         if (dcmd->cmd_status) {
2015                 printk(KERN_WARNING "megasas: SR-IOV: LD/VF affiliation DCMD"
2016                        " failed with status 0x%x for scsi%d.\n",
2017                        dcmd->cmd_status, instance->host->host_no);
2018                 retval = 1; /* Do a scan if we couldn't get affiliation */
2019                 goto out;
2020         }
2021
2022         if (!initial) {
2023                 if (!new_affiliation->ldCount) {
2024                         printk(KERN_WARNING "megasas: SR-IOV: Got new LD/VF "
2025                                "affiliation for passive path for scsi%d.\n",
2026                                instance->host->host_no);
2027                         retval = 1;
2028                         goto out;
2029                 }
2030                 newmap = new_affiliation->map;
2031                 savedmap = instance->vf_affiliation->map;
2032                 thisVf = new_affiliation->thisVf;
2033                 for (i = 0 ; i < new_affiliation->ldCount; i++) {
2034                         found = 0;
2035                         for (j = 0; j < instance->vf_affiliation->ldCount;
2036                              j++) {
2037                                 if (newmap->ref.targetId ==
2038                                     savedmap->ref.targetId) {
2039                                         found = 1;
2040                                         if (newmap->policy[thisVf] !=
2041                                             savedmap->policy[thisVf]) {
2042                                                 doscan = 1;
2043                                                 goto out;
2044                                         }
2045                                 }
2046                                 savedmap = (struct MR_LD_VF_MAP *)
2047                                         ((unsigned char *)savedmap +
2048                                          savedmap->size);
2049                         }
2050                         if (!found && newmap->policy[thisVf] !=
2051                             MR_LD_ACCESS_HIDDEN) {
2052                                 doscan = 1;
2053                                 goto out;
2054                         }
2055                         newmap = (struct MR_LD_VF_MAP *)
2056                                 ((unsigned char *)newmap + newmap->size);
2057                 }
2058
2059                 newmap = new_affiliation->map;
2060                 savedmap = instance->vf_affiliation->map;
2061
2062                 for (i = 0 ; i < instance->vf_affiliation->ldCount; i++) {
2063                         found = 0;
2064                         for (j = 0 ; j < new_affiliation->ldCount; j++) {
2065                                 if (savedmap->ref.targetId ==
2066                                     newmap->ref.targetId) {
2067                                         found = 1;
2068                                         if (savedmap->policy[thisVf] !=
2069                                             newmap->policy[thisVf]) {
2070                                                 doscan = 1;
2071                                                 goto out;
2072                                         }
2073                                 }
2074                                 newmap = (struct MR_LD_VF_MAP *)
2075                                         ((unsigned char *)newmap +
2076                                          newmap->size);
2077                         }
2078                         if (!found && savedmap->policy[thisVf] !=
2079                             MR_LD_ACCESS_HIDDEN) {
2080                                 doscan = 1;
2081                                 goto out;
2082                         }
2083                         savedmap = (struct MR_LD_VF_MAP *)
2084                                 ((unsigned char *)savedmap +
2085                                  savedmap->size);
2086                 }
2087         }
2088 out:
2089         if (doscan) {
2090                 printk(KERN_WARNING "megasas: SR-IOV: Got new LD/VF "
2091                        "affiliation for scsi%d.\n", instance->host->host_no);
2092                 memcpy(instance->vf_affiliation, new_affiliation,
2093                        new_affiliation->size);
2094                 retval = 1;
2095         }
2096
2097         if (new_affiliation)
2098                 pci_free_consistent(instance->pdev,
2099                                     (MAX_LOGICAL_DRIVES + 1) *
2100                                     sizeof(struct MR_LD_VF_AFFILIATION),
2101                                     new_affiliation, new_affiliation_h);
2102         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
2103                 megasas_return_mfi_mpt_pthr(instance, cmd,
2104                         cmd->mpt_pthr_cmd_blocked);
2105         else
2106                 megasas_return_cmd(instance, cmd);
2107
2108         return retval;
2109 }
2110
2111 /* This function will get the current SR-IOV LD/VF affiliation */
2112 static int megasas_get_ld_vf_affiliation(struct megasas_instance *instance,
2113         int initial)
2114 {
2115         int retval;
2116
2117         if (instance->PlasmaFW111)
2118                 retval = megasas_get_ld_vf_affiliation_111(instance, initial);
2119         else
2120                 retval = megasas_get_ld_vf_affiliation_12(instance, initial);
2121         return retval;
2122 }
2123
2124 /* This function will tell FW to start the SR-IOV heartbeat */
2125 int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
2126                                          int initial)
2127 {
2128         struct megasas_cmd *cmd;
2129         struct megasas_dcmd_frame *dcmd;
2130         int retval = 0;
2131
2132         cmd = megasas_get_cmd(instance);
2133
2134         if (!cmd) {
2135                 printk(KERN_DEBUG "megasas: megasas_sriov_start_heartbeat: "
2136                        "Failed to get cmd for scsi%d.\n",
2137                        instance->host->host_no);
2138                 return -ENOMEM;
2139         }
2140
2141         dcmd = &cmd->frame->dcmd;
2142
2143         if (initial) {
2144                 instance->hb_host_mem =
2145                         pci_zalloc_consistent(instance->pdev,
2146                                               sizeof(struct MR_CTRL_HB_HOST_MEM),
2147                                               &instance->hb_host_mem_h);
2148                 if (!instance->hb_host_mem) {
2149                         printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate"
2150                                " memory for heartbeat host memory for "
2151                                "scsi%d.\n", instance->host->host_no);
2152                         retval = -ENOMEM;
2153                         goto out;
2154                 }
2155         }
2156
2157         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2158
2159         dcmd->mbox.s[0] = sizeof(struct MR_CTRL_HB_HOST_MEM);
2160         dcmd->cmd = MFI_CMD_DCMD;
2161         dcmd->cmd_status = 0xFF;
2162         dcmd->sge_count = 1;
2163         dcmd->flags = MFI_FRAME_DIR_BOTH;
2164         dcmd->timeout = 0;
2165         dcmd->pad_0 = 0;
2166         dcmd->data_xfer_len = sizeof(struct MR_CTRL_HB_HOST_MEM);
2167         dcmd->opcode = MR_DCMD_CTRL_SHARED_HOST_MEM_ALLOC;
2168         dcmd->sgl.sge32[0].phys_addr = instance->hb_host_mem_h;
2169         dcmd->sgl.sge32[0].length = sizeof(struct MR_CTRL_HB_HOST_MEM);
2170
2171         printk(KERN_WARNING "megasas: SR-IOV: Starting heartbeat for scsi%d\n",
2172                instance->host->host_no);
2173
2174         if (!megasas_issue_polled(instance, cmd)) {
2175                 retval = 0;
2176         } else {
2177                 printk(KERN_WARNING "megasas: SR-IOV: MR_DCMD_CTRL_SHARED_HOST"
2178                        "_MEM_ALLOC DCMD timed out for scsi%d\n",
2179                        instance->host->host_no);
2180                 retval = 1;
2181                 goto out;
2182         }
2183
2184
2185         if (dcmd->cmd_status) {
2186                 printk(KERN_WARNING "megasas: SR-IOV: MR_DCMD_CTRL_SHARED_HOST"
2187                        "_MEM_ALLOC DCMD failed with status 0x%x for scsi%d\n",
2188                        dcmd->cmd_status,
2189                        instance->host->host_no);
2190                 retval = 1;
2191                 goto out;
2192         }
2193
2194 out:
2195         megasas_return_cmd(instance, cmd);
2196
2197         return retval;
2198 }
2199
2200 /* Handler for SR-IOV heartbeat */
2201 void megasas_sriov_heartbeat_handler(unsigned long instance_addr)
2202 {
2203         struct megasas_instance *instance =
2204                 (struct megasas_instance *)instance_addr;
2205
2206         if (instance->hb_host_mem->HB.fwCounter !=
2207             instance->hb_host_mem->HB.driverCounter) {
2208                 instance->hb_host_mem->HB.driverCounter =
2209                         instance->hb_host_mem->HB.fwCounter;
2210                 mod_timer(&instance->sriov_heartbeat_timer,
2211                           jiffies + MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
2212         } else {
2213                 printk(KERN_WARNING "megasas: SR-IOV: Heartbeat never "
2214                        "completed for scsi%d\n", instance->host->host_no);
2215                 schedule_work(&instance->work_init);
2216         }
2217 }
2218
2219 /**
2220  * megasas_wait_for_outstanding -       Wait for all outstanding cmds
2221  * @instance:                           Adapter soft state
2222  *
2223  * This function waits for up to MEGASAS_RESET_WAIT_TIME seconds for FW to
2224  * complete all its outstanding commands. Returns error if one or more IOs
2225  * are pending after this time period. It also marks the controller dead.
2226  */
2227 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
2228 {
2229         int i;
2230         u32 reset_index;
2231         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
2232         u8 adprecovery;
2233         unsigned long flags;
2234         struct list_head clist_local;
2235         struct megasas_cmd *reset_cmd;
2236         u32 fw_state;
2237         u8 kill_adapter_flag;
2238
2239         spin_lock_irqsave(&instance->hba_lock, flags);
2240         adprecovery = instance->adprecovery;
2241         spin_unlock_irqrestore(&instance->hba_lock, flags);
2242
2243         if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
2244
2245                 INIT_LIST_HEAD(&clist_local);
2246                 spin_lock_irqsave(&instance->hba_lock, flags);
2247                 list_splice_init(&instance->internal_reset_pending_q,
2248                                 &clist_local);
2249                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2250
2251                 printk(KERN_NOTICE "megasas: HBA reset wait ...\n");
2252                 for (i = 0; i < wait_time; i++) {
2253                         msleep(1000);
2254                         spin_lock_irqsave(&instance->hba_lock, flags);
2255                         adprecovery = instance->adprecovery;
2256                         spin_unlock_irqrestore(&instance->hba_lock, flags);
2257                         if (adprecovery == MEGASAS_HBA_OPERATIONAL)
2258                                 break;
2259                 }
2260
2261                 if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
2262                         printk(KERN_NOTICE "megasas: reset: Stopping HBA.\n");
2263                         spin_lock_irqsave(&instance->hba_lock, flags);
2264                         instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
2265                         spin_unlock_irqrestore(&instance->hba_lock, flags);
2266                         return FAILED;
2267                 }
2268
2269                 reset_index     = 0;
2270                 while (!list_empty(&clist_local)) {
2271                         reset_cmd       = list_entry((&clist_local)->next,
2272                                                 struct megasas_cmd, list);
2273                         list_del_init(&reset_cmd->list);
2274                         if (reset_cmd->scmd) {
2275                                 reset_cmd->scmd->result = DID_RESET << 16;
2276                                 printk(KERN_NOTICE "%d:%p reset [%02x]\n",
2277                                         reset_index, reset_cmd,
2278                                         reset_cmd->scmd->cmnd[0]);
2279
2280                                 reset_cmd->scmd->scsi_done(reset_cmd->scmd);
2281                                 megasas_return_cmd(instance, reset_cmd);
2282                         } else if (reset_cmd->sync_cmd) {
2283                                 printk(KERN_NOTICE "megasas:%p synch cmds"
2284                                                 "reset queue\n",
2285                                                 reset_cmd);
2286
2287                                 reset_cmd->cmd_status = ENODATA;
2288                                 instance->instancet->fire_cmd(instance,
2289                                                 reset_cmd->frame_phys_addr,
2290                                                 0, instance->reg_set);
2291                         } else {
2292                                 printk(KERN_NOTICE "megasas: %p unexpected"
2293                                         "cmds lst\n",
2294                                         reset_cmd);
2295                         }
2296                         reset_index++;
2297                 }
2298
2299                 return SUCCESS;
2300         }
2301
2302         for (i = 0; i < resetwaittime; i++) {
2303
2304                 int outstanding = atomic_read(&instance->fw_outstanding);
2305
2306                 if (!outstanding)
2307                         break;
2308
2309                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
2310                         printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
2311                                "commands to complete\n",i,outstanding);
2312                         /*
2313                          * Call cmd completion routine. Cmd to be
2314                          * be completed directly without depending on isr.
2315                          */
2316                         megasas_complete_cmd_dpc((unsigned long)instance);
2317                 }
2318
2319                 msleep(1000);
2320         }
2321
2322         i = 0;
2323         kill_adapter_flag = 0;
2324         do {
2325                 fw_state = instance->instancet->read_fw_status_reg(
2326                                         instance->reg_set) & MFI_STATE_MASK;
2327                 if ((fw_state == MFI_STATE_FAULT) &&
2328                         (instance->disableOnlineCtrlReset == 0)) {
2329                         if (i == 3) {
2330                                 kill_adapter_flag = 2;
2331                                 break;
2332                         }
2333                         megasas_do_ocr(instance);
2334                         kill_adapter_flag = 1;
2335
2336                         /* wait for 1 secs to let FW finish the pending cmds */
2337                         msleep(1000);
2338                 }
2339                 i++;
2340         } while (i <= 3);
2341
2342         if (atomic_read(&instance->fw_outstanding) &&
2343                                         !kill_adapter_flag) {
2344                 if (instance->disableOnlineCtrlReset == 0) {
2345
2346                         megasas_do_ocr(instance);
2347
2348                         /* wait for 5 secs to let FW finish the pending cmds */
2349                         for (i = 0; i < wait_time; i++) {
2350                                 int outstanding =
2351                                         atomic_read(&instance->fw_outstanding);
2352                                 if (!outstanding)
2353                                         return SUCCESS;
2354                                 msleep(1000);
2355                         }
2356                 }
2357         }
2358
2359         if (atomic_read(&instance->fw_outstanding) ||
2360                                         (kill_adapter_flag == 2)) {
2361                 printk(KERN_NOTICE "megaraid_sas: pending cmds after reset\n");
2362                 /*
2363                 * Send signal to FW to stop processing any pending cmds.
2364                 * The controller will be taken offline by the OS now.
2365                 */
2366                 if ((instance->pdev->device ==
2367                         PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
2368                         (instance->pdev->device ==
2369                         PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
2370                         writel(MFI_STOP_ADP,
2371                                 &instance->reg_set->doorbell);
2372                 } else {
2373                         writel(MFI_STOP_ADP,
2374                                 &instance->reg_set->inbound_doorbell);
2375                 }
2376                 megasas_dump_pending_frames(instance);
2377                 spin_lock_irqsave(&instance->hba_lock, flags);
2378                 instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
2379                 spin_unlock_irqrestore(&instance->hba_lock, flags);
2380                 return FAILED;
2381         }
2382
2383         printk(KERN_NOTICE "megaraid_sas: no pending cmds after reset\n");
2384
2385         return SUCCESS;
2386 }
2387
2388 /**
2389  * megasas_generic_reset -      Generic reset routine
2390  * @scmd:                       Mid-layer SCSI command
2391  *
2392  * This routine implements a generic reset handler for device, bus and host
2393  * reset requests. Device, bus and host specific reset handlers can use this
2394  * function after they do their specific tasks.
2395  */
2396 static int megasas_generic_reset(struct scsi_cmnd *scmd)
2397 {
2398         int ret_val;
2399         struct megasas_instance *instance;
2400
2401         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2402
2403         scmd_printk(KERN_NOTICE, scmd, "megasas: RESET cmd=%x retries=%x\n",
2404                  scmd->cmnd[0], scmd->retries);
2405
2406         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
2407                 printk(KERN_ERR "megasas: cannot recover from previous reset "
2408                        "failures\n");
2409                 return FAILED;
2410         }
2411
2412         ret_val = megasas_wait_for_outstanding(instance);
2413         if (ret_val == SUCCESS)
2414                 printk(KERN_NOTICE "megasas: reset successful \n");
2415         else
2416                 printk(KERN_ERR "megasas: failed to do reset\n");
2417
2418         return ret_val;
2419 }
2420
2421 /**
2422  * megasas_reset_timer - quiesce the adapter if required
2423  * @scmd:               scsi cmnd
2424  *
2425  * Sets the FW busy flag and reduces the host->can_queue if the
2426  * cmd has not been completed within the timeout period.
2427  */
2428 static enum
2429 blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
2430 {
2431         struct megasas_instance *instance;
2432         unsigned long flags;
2433
2434         if (time_after(jiffies, scmd->jiffies_at_alloc +
2435                                 (MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
2436                 return BLK_EH_NOT_HANDLED;
2437         }
2438
2439         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2440         if (!(instance->flag & MEGASAS_FW_BUSY)) {
2441                 /* FW is busy, throttle IO */
2442                 spin_lock_irqsave(instance->host->host_lock, flags);
2443
2444                 instance->host->can_queue = instance->throttlequeuedepth;
2445                 instance->last_time = jiffies;
2446                 instance->flag |= MEGASAS_FW_BUSY;
2447
2448                 spin_unlock_irqrestore(instance->host->host_lock, flags);
2449         }
2450         return BLK_EH_RESET_TIMER;
2451 }
2452
2453 /**
2454  * megasas_reset_device -       Device reset handler entry point
2455  */
2456 static int megasas_reset_device(struct scsi_cmnd *scmd)
2457 {
2458         int ret;
2459
2460         /*
2461          * First wait for all commands to complete
2462          */
2463         ret = megasas_generic_reset(scmd);
2464
2465         return ret;
2466 }
2467
2468 /**
2469  * megasas_reset_bus_host -     Bus & host reset handler entry point
2470  */
2471 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
2472 {
2473         int ret;
2474         struct megasas_instance *instance;
2475         instance = (struct megasas_instance *)scmd->device->host->hostdata;
2476
2477         /*
2478          * First wait for all commands to complete
2479          */
2480         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
2481             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
2482             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
2483             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
2484                 ret = megasas_reset_fusion(scmd->device->host, 1);
2485         else
2486                 ret = megasas_generic_reset(scmd);
2487
2488         return ret;
2489 }
2490
2491 /**
2492  * megasas_bios_param - Returns disk geometry for a disk
2493  * @sdev:               device handle
2494  * @bdev:               block device
2495  * @capacity:           drive capacity
2496  * @geom:               geometry parameters
2497  */
2498 static int
2499 megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
2500                  sector_t capacity, int geom[])
2501 {
2502         int heads;
2503         int sectors;
2504         sector_t cylinders;
2505         unsigned long tmp;
2506         /* Default heads (64) & sectors (32) */
2507         heads = 64;
2508         sectors = 32;
2509
2510         tmp = heads * sectors;
2511         cylinders = capacity;
2512
2513         sector_div(cylinders, tmp);
2514
2515         /*
2516          * Handle extended translation size for logical drives > 1Gb
2517          */
2518
2519         if (capacity >= 0x200000) {
2520                 heads = 255;
2521                 sectors = 63;
2522                 tmp = heads*sectors;
2523                 cylinders = capacity;
2524                 sector_div(cylinders, tmp);
2525         }
2526
2527         geom[0] = heads;
2528         geom[1] = sectors;
2529         geom[2] = cylinders;
2530
2531         return 0;
2532 }
2533
2534 static void megasas_aen_polling(struct work_struct *work);
2535
2536 /**
2537  * megasas_service_aen -        Processes an event notification
2538  * @instance:                   Adapter soft state
2539  * @cmd:                        AEN command completed by the ISR
2540  *
2541  * For AEN, driver sends a command down to FW that is held by the FW till an
2542  * event occurs. When an event of interest occurs, FW completes the command
2543  * that it was previously holding.
2544  *
2545  * This routines sends SIGIO signal to processes that have registered with the
2546  * driver for AEN.
2547  */
2548 static void
2549 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
2550 {
2551         unsigned long flags;
2552         /*
2553          * Don't signal app if it is just an aborted previously registered aen
2554          */
2555         if ((!cmd->abort_aen) && (instance->unload == 0)) {
2556                 spin_lock_irqsave(&poll_aen_lock, flags);
2557                 megasas_poll_wait_aen = 1;
2558                 spin_unlock_irqrestore(&poll_aen_lock, flags);
2559                 wake_up(&megasas_poll_wait);
2560                 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
2561         }
2562         else
2563                 cmd->abort_aen = 0;
2564
2565         instance->aen_cmd = NULL;
2566
2567         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
2568                 megasas_return_mfi_mpt_pthr(instance, cmd,
2569                         cmd->mpt_pthr_cmd_blocked);
2570         else
2571                 megasas_return_cmd(instance, cmd);
2572
2573         if ((instance->unload == 0) &&
2574                 ((instance->issuepend_done == 1))) {
2575                 struct megasas_aen_event *ev;
2576                 ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
2577                 if (!ev) {
2578                         printk(KERN_ERR "megasas_service_aen: out of memory\n");
2579                 } else {
2580                         ev->instance = instance;
2581                         instance->ev = ev;
2582                         INIT_DELAYED_WORK(&ev->hotplug_work,
2583                                           megasas_aen_polling);
2584                         schedule_delayed_work(&ev->hotplug_work, 0);
2585                 }
2586         }
2587 }
2588
2589 static int megasas_change_queue_depth(struct scsi_device *sdev,
2590                                       int queue_depth, int reason)
2591 {
2592         if (reason != SCSI_QDEPTH_DEFAULT)
2593                 return -EOPNOTSUPP;
2594
2595         if (queue_depth > sdev->host->can_queue)
2596                 queue_depth = sdev->host->can_queue;
2597         scsi_adjust_queue_depth(sdev, queue_depth);
2598
2599         return queue_depth;
2600 }
2601
2602 static ssize_t
2603 megasas_fw_crash_buffer_store(struct device *cdev,
2604         struct device_attribute *attr, const char *buf, size_t count)
2605 {
2606         struct Scsi_Host *shost = class_to_shost(cdev);
2607         struct megasas_instance *instance =
2608                 (struct megasas_instance *) shost->hostdata;
2609         int val = 0;
2610         unsigned long flags;
2611
2612         if (kstrtoint(buf, 0, &val) != 0)
2613                 return -EINVAL;
2614
2615         spin_lock_irqsave(&instance->crashdump_lock, flags);
2616         instance->fw_crash_buffer_offset = val;
2617         spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2618         return strlen(buf);
2619 }
2620
2621 static ssize_t
2622 megasas_fw_crash_buffer_show(struct device *cdev,
2623         struct device_attribute *attr, char *buf)
2624 {
2625         struct Scsi_Host *shost = class_to_shost(cdev);
2626         struct megasas_instance *instance =
2627                 (struct megasas_instance *) shost->hostdata;
2628         u32 size;
2629         unsigned long buff_addr;
2630         unsigned long dmachunk = CRASH_DMA_BUF_SIZE;
2631         unsigned long src_addr;
2632         unsigned long flags;
2633         u32 buff_offset;
2634
2635         spin_lock_irqsave(&instance->crashdump_lock, flags);
2636         buff_offset = instance->fw_crash_buffer_offset;
2637         if (!instance->crash_dump_buf &&
2638                 !((instance->fw_crash_state == AVAILABLE) ||
2639                 (instance->fw_crash_state == COPYING))) {
2640                 dev_err(&instance->pdev->dev,
2641                         "Firmware crash dump is not available\n");
2642                 spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2643                 return -EINVAL;
2644         }
2645
2646         buff_addr = (unsigned long) buf;
2647
2648         if (buff_offset >
2649                 (instance->fw_crash_buffer_size * dmachunk)) {
2650                 dev_err(&instance->pdev->dev,
2651                         "Firmware crash dump offset is out of range\n");
2652                 spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2653                 return 0;
2654         }
2655
2656         size = (instance->fw_crash_buffer_size * dmachunk) - buff_offset;
2657         size = (size >= PAGE_SIZE) ? (PAGE_SIZE - 1) : size;
2658
2659         src_addr = (unsigned long)instance->crash_buf[buff_offset / dmachunk] +
2660                 (buff_offset % dmachunk);
2661         memcpy(buf, (void *)src_addr,  size);
2662         spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2663
2664         return size;
2665 }
2666
2667 static ssize_t
2668 megasas_fw_crash_buffer_size_show(struct device *cdev,
2669         struct device_attribute *attr, char *buf)
2670 {
2671         struct Scsi_Host *shost = class_to_shost(cdev);
2672         struct megasas_instance *instance =
2673                 (struct megasas_instance *) shost->hostdata;
2674
2675         return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)
2676                 ((instance->fw_crash_buffer_size) * 1024 * 1024)/PAGE_SIZE);
2677 }
2678
2679 static ssize_t
2680 megasas_fw_crash_state_store(struct device *cdev,
2681         struct device_attribute *attr, const char *buf, size_t count)
2682 {
2683         struct Scsi_Host *shost = class_to_shost(cdev);
2684         struct megasas_instance *instance =
2685                 (struct megasas_instance *) shost->hostdata;
2686         int val = 0;
2687         unsigned long flags;
2688
2689         if (kstrtoint(buf, 0, &val) != 0)
2690                 return -EINVAL;
2691
2692         if ((val <= AVAILABLE || val > COPY_ERROR)) {
2693                 dev_err(&instance->pdev->dev, "application updates invalid "
2694                         "firmware crash state\n");
2695                 return -EINVAL;
2696         }
2697
2698         instance->fw_crash_state = val;
2699
2700         if ((val == COPIED) || (val == COPY_ERROR)) {
2701                 spin_lock_irqsave(&instance->crashdump_lock, flags);
2702                 megasas_free_host_crash_buffer(instance);
2703                 spin_unlock_irqrestore(&instance->crashdump_lock, flags);
2704                 if (val == COPY_ERROR)
2705                         dev_info(&instance->pdev->dev, "application failed to "
2706                                 "copy Firmware crash dump\n");
2707                 else
2708                         dev_info(&instance->pdev->dev, "Firmware crash dump "
2709                                 "copied successfully\n");
2710         }
2711         return strlen(buf);
2712 }
2713
2714 static ssize_t
2715 megasas_fw_crash_state_show(struct device *cdev,
2716         struct device_attribute *attr, char *buf)
2717 {
2718         struct Scsi_Host *shost = class_to_shost(cdev);
2719         struct megasas_instance *instance =
2720                 (struct megasas_instance *) shost->hostdata;
2721         return snprintf(buf, PAGE_SIZE, "%d\n", instance->fw_crash_state);
2722 }
2723
2724 static ssize_t
2725 megasas_page_size_show(struct device *cdev,
2726         struct device_attribute *attr, char *buf)
2727 {
2728         return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)PAGE_SIZE - 1);
2729 }
2730
2731 static DEVICE_ATTR(fw_crash_buffer, S_IRUGO | S_IWUSR,
2732         megasas_fw_crash_buffer_show, megasas_fw_crash_buffer_store);
2733 static DEVICE_ATTR(fw_crash_buffer_size, S_IRUGO,
2734         megasas_fw_crash_buffer_size_show, NULL);
2735 static DEVICE_ATTR(fw_crash_state, S_IRUGO | S_IWUSR,
2736         megasas_fw_crash_state_show, megasas_fw_crash_state_store);
2737 static DEVICE_ATTR(page_size, S_IRUGO,
2738         megasas_page_size_show, NULL);
2739
2740 struct device_attribute *megaraid_host_attrs[] = {
2741         &dev_attr_fw_crash_buffer_size,
2742         &dev_attr_fw_crash_buffer,
2743         &dev_attr_fw_crash_state,
2744         &dev_attr_page_size,
2745         NULL,
2746 };
2747
2748 /*
2749  * Scsi host template for megaraid_sas driver
2750  */
2751 static struct scsi_host_template megasas_template = {
2752
2753         .module = THIS_MODULE,
2754         .name = "LSI SAS based MegaRAID driver",
2755         .proc_name = "megaraid_sas",
2756         .slave_configure = megasas_slave_configure,
2757         .slave_alloc = megasas_slave_alloc,
2758         .queuecommand = megasas_queue_command,
2759         .eh_device_reset_handler = megasas_reset_device,
2760         .eh_bus_reset_handler = megasas_reset_bus_host,
2761         .eh_host_reset_handler = megasas_reset_bus_host,
2762         .eh_timed_out = megasas_reset_timer,
2763         .shost_attrs = megaraid_host_attrs,
2764         .bios_param = megasas_bios_param,
2765         .use_clustering = ENABLE_CLUSTERING,
2766         .change_queue_depth = megasas_change_queue_depth,
2767         .no_write_same = 1,
2768 };
2769
2770 /**
2771  * megasas_complete_int_cmd -   Completes an internal command
2772  * @instance:                   Adapter soft state
2773  * @cmd:                        Command to be completed
2774  *
2775  * The megasas_issue_blocked_cmd() function waits for a command to complete
2776  * after it issues a command. This function wakes up that waiting routine by
2777  * calling wake_up() on the wait queue.
2778  */
2779 static void
2780 megasas_complete_int_cmd(struct megasas_instance *instance,
2781                          struct megasas_cmd *cmd)
2782 {
2783         cmd->cmd_status = cmd->frame->io.cmd_status;
2784
2785         if (cmd->cmd_status == ENODATA) {
2786                 cmd->cmd_status = 0;
2787         }
2788         wake_up(&instance->int_cmd_wait_q);
2789 }
2790
2791 /**
2792  * megasas_complete_abort -     Completes aborting a command
2793  * @instance:                   Adapter soft state
2794  * @cmd:                        Cmd that was issued to abort another cmd
2795  *
2796  * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
2797  * after it issues an abort on a previously issued command. This function
2798  * wakes up all functions waiting on the same wait queue.
2799  */
2800 static void
2801 megasas_complete_abort(struct megasas_instance *instance,
2802                        struct megasas_cmd *cmd)
2803 {
2804         if (cmd->sync_cmd) {
2805                 cmd->sync_cmd = 0;
2806                 cmd->cmd_status = 0;
2807                 wake_up(&instance->abort_cmd_wait_q);
2808         }
2809
2810         return;
2811 }
2812
2813 /**
2814  * megasas_complete_cmd -       Completes a command
2815  * @instance:                   Adapter soft state
2816  * @cmd:                        Command to be completed
2817  * @alt_status:                 If non-zero, use this value as status to
2818  *                              SCSI mid-layer instead of the value returned
2819  *                              by the FW. This should be used if caller wants
2820  *                              an alternate status (as in the case of aborted
2821  *                              commands)
2822  */
2823 void
2824 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
2825                      u8 alt_status)
2826 {
2827         int exception = 0;
2828         struct megasas_header *hdr = &cmd->frame->hdr;
2829         unsigned long flags;
2830         struct fusion_context *fusion = instance->ctrl_context;
2831         u32 opcode;
2832
2833         /* flag for the retry reset */
2834         cmd->retry_for_fw_reset = 0;
2835
2836         if (cmd->scmd)
2837                 cmd->scmd->SCp.ptr = NULL;
2838
2839         switch (hdr->cmd) {
2840         case MFI_CMD_INVALID:
2841                 /* Some older 1068 controller FW may keep a pended
2842                    MR_DCMD_CTRL_EVENT_GET_INFO left over from the main kernel
2843                    when booting the kdump kernel.  Ignore this command to
2844                    prevent a kernel panic on shutdown of the kdump kernel. */
2845                 printk(KERN_WARNING "megaraid_sas: MFI_CMD_INVALID command "
2846                        "completed.\n");
2847                 printk(KERN_WARNING "megaraid_sas: If you have a controller "
2848                        "other than PERC5, please upgrade your firmware.\n");
2849                 break;
2850         case MFI_CMD_PD_SCSI_IO:
2851         case MFI_CMD_LD_SCSI_IO:
2852
2853                 /*
2854                  * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
2855                  * issued either through an IO path or an IOCTL path. If it
2856                  * was via IOCTL, we will send it to internal completion.
2857                  */
2858                 if (cmd->sync_cmd) {
2859                         cmd->sync_cmd = 0;
2860                         megasas_complete_int_cmd(instance, cmd);
2861                         break;
2862                 }
2863
2864         case MFI_CMD_LD_READ:
2865         case MFI_CMD_LD_WRITE:
2866
2867                 if (alt_status) {
2868                         cmd->scmd->result = alt_status << 16;
2869                         exception = 1;
2870                 }
2871
2872                 if (exception) {
2873
2874                         atomic_dec(&instance->fw_outstanding);
2875
2876                         scsi_dma_unmap(cmd->scmd);
2877                         cmd->scmd->scsi_done(cmd->scmd);
2878                         megasas_return_cmd(instance, cmd);
2879
2880                         break;
2881                 }
2882
2883                 switch (hdr->cmd_status) {
2884
2885                 case MFI_STAT_OK:
2886                         cmd->scmd->result = DID_OK << 16;
2887                         break;
2888
2889                 case MFI_STAT_SCSI_IO_FAILED:
2890                 case MFI_STAT_LD_INIT_IN_PROGRESS:
2891                         cmd->scmd->result =
2892                             (DID_ERROR << 16) | hdr->scsi_status;
2893                         break;
2894
2895                 case MFI_STAT_SCSI_DONE_WITH_ERROR:
2896
2897                         cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
2898
2899                         if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
2900                                 memset(cmd->scmd->sense_buffer, 0,
2901                                        SCSI_SENSE_BUFFERSIZE);
2902                                 memcpy(cmd->scmd->sense_buffer, cmd->sense,
2903                                        hdr->sense_len);
2904
2905                                 cmd->scmd->result |= DRIVER_SENSE << 24;
2906                         }
2907
2908                         break;
2909
2910                 case MFI_STAT_LD_OFFLINE:
2911                 case MFI_STAT_DEVICE_NOT_FOUND:
2912                         cmd->scmd->result = DID_BAD_TARGET << 16;
2913                         break;
2914
2915                 default:
2916                         printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
2917                                hdr->cmd_status);
2918                         cmd->scmd->result = DID_ERROR << 16;
2919                         break;
2920                 }
2921
2922                 atomic_dec(&instance->fw_outstanding);
2923
2924                 scsi_dma_unmap(cmd->scmd);
2925                 cmd->scmd->scsi_done(cmd->scmd);
2926                 megasas_return_cmd(instance, cmd);
2927
2928                 break;
2929
2930         case MFI_CMD_SMP:
2931         case MFI_CMD_STP:
2932         case MFI_CMD_DCMD:
2933                 opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
2934                 /* Check for LD map update */
2935                 if ((opcode == MR_DCMD_LD_MAP_GET_INFO)
2936                         && (cmd->frame->dcmd.mbox.b[1] == 1)) {
2937                         fusion->fast_path_io = 0;
2938                         spin_lock_irqsave(instance->host->host_lock, flags);
2939                         if (cmd->frame->hdr.cmd_status != 0) {
2940                                 if (cmd->frame->hdr.cmd_status !=
2941                                     MFI_STAT_NOT_FOUND)
2942                                         printk(KERN_WARNING "megasas: map sync"
2943                                                "failed, status = 0x%x.\n",
2944                                                cmd->frame->hdr.cmd_status);
2945                                 else {
2946                                         megasas_return_mfi_mpt_pthr(instance,
2947                                                 cmd, cmd->mpt_pthr_cmd_blocked);
2948                                         spin_unlock_irqrestore(
2949                                                 instance->host->host_lock,
2950                                                 flags);
2951                                         break;
2952                                 }
2953                         } else
2954                                 instance->map_id++;
2955                         megasas_return_mfi_mpt_pthr(instance, cmd,
2956                                 cmd->mpt_pthr_cmd_blocked);
2957
2958                         /*
2959                          * Set fast path IO to ZERO.
2960                          * Validate Map will set proper value.
2961                          * Meanwhile all IOs will go as LD IO.
2962                          */
2963                         if (MR_ValidateMapInfo(instance))
2964                                 fusion->fast_path_io = 1;
2965                         else
2966                                 fusion->fast_path_io = 0;
2967                         megasas_sync_map_info(instance);
2968                         spin_unlock_irqrestore(instance->host->host_lock,
2969                                                flags);
2970                         break;
2971                 }
2972                 if (opcode == MR_DCMD_CTRL_EVENT_GET_INFO ||
2973                     opcode == MR_DCMD_CTRL_EVENT_GET) {
2974                         spin_lock_irqsave(&poll_aen_lock, flags);
2975                         megasas_poll_wait_aen = 0;
2976                         spin_unlock_irqrestore(&poll_aen_lock, flags);
2977                 }
2978
2979                 /*
2980                  * See if got an event notification
2981                  */
2982                 if (opcode == MR_DCMD_CTRL_EVENT_WAIT)
2983                         megasas_service_aen(instance, cmd);
2984                 else
2985                         megasas_complete_int_cmd(instance, cmd);
2986
2987                 break;
2988
2989         case MFI_CMD_ABORT:
2990                 /*
2991                  * Cmd issued to abort another cmd returned
2992                  */
2993                 megasas_complete_abort(instance, cmd);
2994                 break;
2995
2996         default:
2997                 printk("megasas: Unknown command completed! [0x%X]\n",
2998                        hdr->cmd);
2999                 break;
3000         }
3001 }
3002
3003 /**
3004  * megasas_issue_pending_cmds_again -   issue all pending cmds
3005  *                                      in FW again because of the fw reset
3006  * @instance:                           Adapter soft state
3007  */
3008 static inline void
3009 megasas_issue_pending_cmds_again(struct megasas_instance *instance)
3010 {
3011         struct megasas_cmd *cmd;
3012         struct list_head clist_local;
3013         union megasas_evt_class_locale class_locale;
3014         unsigned long flags;
3015         u32 seq_num;
3016
3017         INIT_LIST_HEAD(&clist_local);
3018         spin_lock_irqsave(&instance->hba_lock, flags);
3019         list_splice_init(&instance->internal_reset_pending_q, &clist_local);
3020         spin_unlock_irqrestore(&instance->hba_lock, flags);
3021
3022         while (!list_empty(&clist_local)) {
3023                 cmd     = list_entry((&clist_local)->next,
3024                                         struct megasas_cmd, list);
3025                 list_del_init(&cmd->list);
3026
3027                 if (cmd->sync_cmd || cmd->scmd) {
3028                         printk(KERN_NOTICE "megaraid_sas: command %p, %p:%d"
3029                                 "detected to be pending while HBA reset.\n",
3030                                         cmd, cmd->scmd, cmd->sync_cmd);
3031
3032                         cmd->retry_for_fw_reset++;
3033
3034                         if (cmd->retry_for_fw_reset == 3) {
3035                                 printk(KERN_NOTICE "megaraid_sas: cmd %p, %p:%d"
3036                                         "was tried multiple times during reset."
3037                                         "Shutting down the HBA\n",
3038                                         cmd, cmd->scmd, cmd->sync_cmd);
3039                                 megaraid_sas_kill_hba(instance);
3040
3041                                 instance->adprecovery =
3042                                                 MEGASAS_HW_CRITICAL_ERROR;
3043                                 return;
3044                         }
3045                 }
3046
3047                 if (cmd->sync_cmd == 1) {
3048                         if (cmd->scmd) {
3049                                 printk(KERN_NOTICE "megaraid_sas: unexpected"
3050                                         "cmd attached to internal command!\n");
3051                         }
3052                         printk(KERN_NOTICE "megasas: %p synchronous cmd"
3053                                                 "on the internal reset queue,"
3054                                                 "issue it again.\n", cmd);
3055                         cmd->cmd_status = ENODATA;
3056                         instance->instancet->fire_cmd(instance,
3057                                                         cmd->frame_phys_addr ,
3058                                                         0, instance->reg_set);
3059                 } else if (cmd->scmd) {
3060                         printk(KERN_NOTICE "megasas: %p scsi cmd [%02x]"
3061                         "detected on the internal queue, issue again.\n",
3062                         cmd, cmd->scmd->cmnd[0]);
3063
3064                         atomic_inc(&instance->fw_outstanding);
3065                         instance->instancet->fire_cmd(instance,
3066                                         cmd->frame_phys_addr,
3067                                         cmd->frame_count-1, instance->reg_set);
3068                 } else {
3069                         printk(KERN_NOTICE "megasas: %p unexpected cmd on the"
3070                                 "internal reset defer list while re-issue!!\n",
3071                                 cmd);
3072                 }
3073         }
3074
3075         if (instance->aen_cmd) {
3076                 printk(KERN_NOTICE "megaraid_sas: aen_cmd in def process\n");
3077                 megasas_return_cmd(instance, instance->aen_cmd);
3078
3079                 instance->aen_cmd       = NULL;
3080         }
3081
3082         /*
3083         * Initiate AEN (Asynchronous Event Notification)
3084         */
3085         seq_num = instance->last_seq_num;
3086         class_locale.members.reserved = 0;
3087         class_locale.members.locale = MR_EVT_LOCALE_ALL;
3088         class_locale.members.class = MR_EVT_CLASS_DEBUG;
3089
3090         megasas_register_aen(instance, seq_num, class_locale.word);
3091 }
3092
3093 /**
3094  * Move the internal reset pending commands to a deferred queue.
3095  *
3096  * We move the commands pending at internal reset time to a
3097  * pending queue. This queue would be flushed after successful
3098  * completion of the internal reset sequence. if the internal reset
3099  * did not complete in time, the kernel reset handler would flush
3100  * these commands.
3101  **/
3102 static void
3103 megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
3104 {
3105         struct megasas_cmd *cmd;
3106         int i;
3107         u32 max_cmd = instance->max_fw_cmds;
3108         u32 defer_index;
3109         unsigned long flags;
3110
3111         defer_index     = 0;
3112         spin_lock_irqsave(&instance->mfi_pool_lock, flags);
3113         for (i = 0; i < max_cmd; i++) {
3114                 cmd = instance->cmd_list[i];
3115                 if (cmd->sync_cmd == 1 || cmd->scmd) {
3116                         printk(KERN_NOTICE "megasas: moving cmd[%d]:%p:%d:%p"
3117                                         "on the defer queue as internal\n",
3118                                 defer_index, cmd, cmd->sync_cmd, cmd->scmd);
3119
3120                         if (!list_empty(&cmd->list)) {
3121                                 printk(KERN_NOTICE "megaraid_sas: ERROR while"
3122                                         " moving this cmd:%p, %d %p, it was"
3123                                         "discovered on some list?\n",
3124                                         cmd, cmd->sync_cmd, cmd->scmd);
3125
3126                                 list_del_init(&cmd->list);
3127                         }
3128                         defer_index++;
3129                         list_add_tail(&cmd->list,
3130                                 &instance->internal_reset_pending_q);
3131                 }
3132         }
3133         spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
3134 }
3135
3136
3137 static void
3138 process_fw_state_change_wq(struct work_struct *work)
3139 {
3140         struct megasas_instance *instance =
3141                 container_of(work, struct megasas_instance, work_init);
3142         u32 wait;
3143         unsigned long flags;
3144
3145         if (instance->adprecovery != MEGASAS_ADPRESET_SM_INFAULT) {
3146                 printk(KERN_NOTICE "megaraid_sas: error, recovery st %x \n",
3147                                 instance->adprecovery);
3148                 return ;
3149         }
3150
3151         if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
3152                 printk(KERN_NOTICE "megaraid_sas: FW detected to be in fault"
3153                                         "state, restarting it...\n");
3154
3155                 instance->instancet->disable_intr(instance);
3156                 atomic_set(&instance->fw_outstanding, 0);
3157
3158                 atomic_set(&instance->fw_reset_no_pci_access, 1);
3159                 instance->instancet->adp_reset(instance, instance->reg_set);
3160                 atomic_set(&instance->fw_reset_no_pci_access, 0 );
3161
3162                 printk(KERN_NOTICE "megaraid_sas: FW restarted successfully,"
3163                                         "initiating next stage...\n");
3164
3165                 printk(KERN_NOTICE "megaraid_sas: HBA recovery state machine,"
3166                                         "state 2 starting...\n");
3167
3168                 /*waitting for about 20 second before start the second init*/
3169                 for (wait = 0; wait < 30; wait++) {
3170                         msleep(1000);
3171                 }
3172
3173                 if (megasas_transition_to_ready(instance, 1)) {
3174                         printk(KERN_NOTICE "megaraid_sas:adapter not ready\n");
3175
3176                         megaraid_sas_kill_hba(instance);
3177                         instance->adprecovery   = MEGASAS_HW_CRITICAL_ERROR;
3178                         return ;
3179                 }
3180
3181                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
3182                         (instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
3183                         (instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)
3184                         ) {
3185                         *instance->consumer = *instance->producer;
3186                 } else {
3187                         *instance->consumer = 0;
3188                         *instance->producer = 0;
3189                 }
3190
3191                 megasas_issue_init_mfi(instance);
3192
3193                 spin_lock_irqsave(&instance->hba_lock, flags);
3194                 instance->adprecovery   = MEGASAS_HBA_OPERATIONAL;
3195                 spin_unlock_irqrestore(&instance->hba_lock, flags);
3196                 instance->instancet->enable_intr(instance);
3197
3198                 megasas_issue_pending_cmds_again(instance);
3199                 instance->issuepend_done = 1;
3200         }
3201         return ;
3202 }
3203
3204 /**
3205  * megasas_deplete_reply_queue -        Processes all completed commands
3206  * @instance:                           Adapter soft state
3207  * @alt_status:                         Alternate status to be returned to
3208  *                                      SCSI mid-layer instead of the status
3209  *                                      returned by the FW
3210  * Note: this must be called with hba lock held
3211  */
3212 static int
3213 megasas_deplete_reply_queue(struct megasas_instance *instance,
3214                                         u8 alt_status)
3215 {
3216         u32 mfiStatus;
3217         u32 fw_state;
3218
3219         if ((mfiStatus = instance->instancet->check_reset(instance,
3220                                         instance->reg_set)) == 1) {
3221                 return IRQ_HANDLED;
3222         }
3223
3224         if ((mfiStatus = instance->instancet->clear_intr(
3225                                                 instance->reg_set)
3226                                                 ) == 0) {
3227                 /* Hardware may not set outbound_intr_status in MSI-X mode */
3228                 if (!instance->msix_vectors)
3229                         return IRQ_NONE;
3230         }
3231
3232         instance->mfiStatus = mfiStatus;
3233
3234         if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
3235                 fw_state = instance->instancet->read_fw_status_reg(
3236                                 instance->reg_set) & MFI_STATE_MASK;
3237
3238                 if (fw_state != MFI_STATE_FAULT) {
3239                         printk(KERN_NOTICE "megaraid_sas: fw state:%x\n",
3240                                                 fw_state);
3241                 }
3242
3243                 if ((fw_state == MFI_STATE_FAULT) &&
3244                                 (instance->disableOnlineCtrlReset == 0)) {
3245                         printk(KERN_NOTICE "megaraid_sas: wait adp restart\n");
3246
3247                         if ((instance->pdev->device ==
3248                                         PCI_DEVICE_ID_LSI_SAS1064R) ||
3249                                 (instance->pdev->device ==
3250                                         PCI_DEVICE_ID_DELL_PERC5) ||
3251                                 (instance->pdev->device ==
3252                                         PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
3253
3254                                 *instance->consumer =
3255                                         cpu_to_le32(MEGASAS_ADPRESET_INPROG_SIGN);
3256                         }
3257
3258
3259                         instance->instancet->disable_intr(instance);
3260                         instance->adprecovery   = MEGASAS_ADPRESET_SM_INFAULT;
3261                         instance->issuepend_done = 0;
3262
3263                         atomic_set(&instance->fw_outstanding, 0);
3264                         megasas_internal_reset_defer_cmds(instance);
3265
3266                         printk(KERN_NOTICE "megasas: fwState=%x, stage:%d\n",
3267                                         fw_state, instance->adprecovery);
3268
3269                         schedule_work(&instance->work_init);
3270                         return IRQ_HANDLED;
3271
3272                 } else {
3273                         printk(KERN_NOTICE "megasas: fwstate:%x, dis_OCR=%x\n",
3274                                 fw_state, instance->disableOnlineCtrlReset);
3275                 }
3276         }
3277
3278         tasklet_schedule(&instance->isr_tasklet);
3279         return IRQ_HANDLED;
3280 }
3281 /**
3282  * megasas_isr - isr entry point
3283  */
3284 static irqreturn_t megasas_isr(int irq, void *devp)
3285 {
3286         struct megasas_irq_context *irq_context = devp;
3287         struct megasas_instance *instance = irq_context->instance;
3288         unsigned long flags;
3289         irqreturn_t     rc;
3290
3291         if (atomic_read(&instance->fw_reset_no_pci_access))
3292                 return IRQ_HANDLED;
3293
3294         spin_lock_irqsave(&instance->hba_lock, flags);
3295         rc =  megasas_deplete_reply_queue(instance, DID_OK);
3296         spin_unlock_irqrestore(&instance->hba_lock, flags);
3297
3298         return rc;
3299 }
3300
3301 /**
3302  * megasas_transition_to_ready -        Move the FW to READY state
3303  * @instance:                           Adapter soft state
3304  *
3305  * During the initialization, FW passes can potentially be in any one of
3306  * several possible states. If the FW in operational, waiting-for-handshake
3307  * states, driver must take steps to bring it to ready state. Otherwise, it
3308  * has to wait for the ready state.
3309  */
3310 int
3311 megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
3312 {
3313         int i;
3314         u8 max_wait;
3315         u32 fw_state;
3316         u32 cur_state;
3317         u32 abs_state, curr_abs_state;
3318
3319         abs_state = instance->instancet->read_fw_status_reg(instance->reg_set);
3320         fw_state = abs_state & MFI_STATE_MASK;
3321
3322         if (fw_state != MFI_STATE_READY)
3323                 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
3324                        " state\n");
3325
3326         while (fw_state != MFI_STATE_READY) {
3327
3328                 switch (fw_state) {
3329
3330                 case MFI_STATE_FAULT:
3331                         printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
3332                         if (ocr) {
3333                                 max_wait = MEGASAS_RESET_WAIT_TIME;
3334                                 cur_state = MFI_STATE_FAULT;
3335                                 break;
3336                         } else
3337                                 return -ENODEV;
3338
3339                 case MFI_STATE_WAIT_HANDSHAKE:
3340                         /*
3341                          * Set the CLR bit in inbound doorbell
3342                          */
3343                         if ((instance->pdev->device ==
3344                                 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3345                                 (instance->pdev->device ==
3346                                  PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
3347                                 (instance->pdev->device ==
3348                                 PCI_DEVICE_ID_LSI_FUSION) ||
3349                                 (instance->pdev->device ==
3350                                 PCI_DEVICE_ID_LSI_PLASMA) ||
3351                                 (instance->pdev->device ==
3352                                 PCI_DEVICE_ID_LSI_INVADER) ||
3353                                 (instance->pdev->device ==
3354                                 PCI_DEVICE_ID_LSI_FURY)) {
3355                                 writel(
3356                                   MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
3357                                   &instance->reg_set->doorbell);
3358                         } else {
3359                                 writel(
3360                                     MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
3361                                         &instance->reg_set->inbound_doorbell);
3362                         }
3363
3364                         max_wait = MEGASAS_RESET_WAIT_TIME;
3365                         cur_state = MFI_STATE_WAIT_HANDSHAKE;
3366                         break;
3367
3368                 case MFI_STATE_BOOT_MESSAGE_PENDING:
3369                         if ((instance->pdev->device ==
3370                              PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3371                                 (instance->pdev->device ==
3372                                  PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
3373                             (instance->pdev->device ==
3374                              PCI_DEVICE_ID_LSI_FUSION) ||
3375                             (instance->pdev->device ==
3376                              PCI_DEVICE_ID_LSI_PLASMA) ||
3377                             (instance->pdev->device ==
3378                              PCI_DEVICE_ID_LSI_INVADER) ||
3379                             (instance->pdev->device ==
3380                              PCI_DEVICE_ID_LSI_FURY)) {
3381                                 writel(MFI_INIT_HOTPLUG,
3382                                        &instance->reg_set->doorbell);
3383                         } else
3384                                 writel(MFI_INIT_HOTPLUG,
3385                                         &instance->reg_set->inbound_doorbell);
3386
3387                         max_wait = MEGASAS_RESET_WAIT_TIME;
3388                         cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
3389                         break;
3390
3391                 case MFI_STATE_OPERATIONAL:
3392                         /*
3393                          * Bring it to READY state; assuming max wait 10 secs
3394                          */
3395                         instance->instancet->disable_intr(instance);
3396                         if ((instance->pdev->device ==
3397                                 PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
3398                                 (instance->pdev->device ==
3399                                 PCI_DEVICE_ID_LSI_SAS0071SKINNY)  ||
3400                                 (instance->pdev->device
3401                                         == PCI_DEVICE_ID_LSI_FUSION) ||
3402                                 (instance->pdev->device
3403                                         == PCI_DEVICE_ID_LSI_PLASMA) ||
3404                                 (instance->pdev->device
3405                                         == PCI_DEVICE_ID_LSI_INVADER) ||
3406                                 (instance->pdev->device
3407                                         == PCI_DEVICE_ID_LSI_FURY)) {
3408                                 writel(MFI_RESET_FLAGS,
3409                                         &instance->reg_set->doorbell);
3410                                 if ((instance->pdev->device ==
3411                                         PCI_DEVICE_ID_LSI_FUSION) ||
3412                                         (instance->pdev->device ==
3413                                         PCI_DEVICE_ID_LSI_PLASMA) ||
3414                                         (instance->pdev->device ==
3415                                         PCI_DEVICE_ID_LSI_INVADER) ||
3416                                         (instance->pdev->device ==
3417                                         PCI_DEVICE_ID_LSI_FURY)) {
3418                                         for (i = 0; i < (10 * 1000); i += 20) {
3419                                                 if (readl(
3420                                                             &instance->
3421                                                             reg_set->
3422                                                             doorbell) & 1)
3423                                                         msleep(20);
3424                                                 else
3425                                                         break;
3426                                         }
3427                                 }
3428                         } else
3429                                 writel(MFI_RESET_FLAGS,
3430                                         &instance->reg_set->inbound_doorbell);
3431
3432                         max_wait = MEGASAS_RESET_WAIT_TIME;
3433                         cur_state = MFI_STATE_OPERATIONAL;
3434                         break;
3435
3436                 case MFI_STATE_UNDEFINED:
3437                         /*
3438                          * This state should not last for more than 2 seconds
3439                          */
3440                         max_wait = MEGASAS_RESET_WAIT_TIME;
3441                         cur_state = MFI_STATE_UNDEFINED;
3442                         break;
3443
3444                 case MFI_STATE_BB_INIT:
3445                         max_wait = MEGASAS_RESET_WAIT_TIME;
3446                         cur_state = MFI_STATE_BB_INIT;
3447                         break;
3448
3449                 case MFI_STATE_FW_INIT:
3450                         max_wait = MEGASAS_RESET_WAIT_TIME;
3451                         cur_state = MFI_STATE_FW_INIT;
3452                         break;
3453
3454                 case MFI_STATE_FW_INIT_2:
3455                         max_wait = MEGASAS_RESET_WAIT_TIME;
3456                         cur_state = MFI_STATE_FW_INIT_2;
3457                         break;
3458
3459                 case MFI_STATE_DEVICE_SCAN:
3460                         max_wait = MEGASAS_RESET_WAIT_TIME;
3461                         cur_state = MFI_STATE_DEVICE_SCAN;
3462                         break;
3463
3464                 case MFI_STATE_FLUSH_CACHE:
3465                         max_wait = MEGASAS_RESET_WAIT_TIME;
3466                         cur_state = MFI_STATE_FLUSH_CACHE;
3467                         break;
3468
3469                 default:
3470                         printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
3471                                fw_state);
3472                         return -ENODEV;
3473                 }
3474
3475                 /*
3476                  * The cur_state should not last for more than max_wait secs
3477                  */
3478                 for (i = 0; i < (max_wait * 1000); i++) {
3479                         curr_abs_state = instance->instancet->
3480                                 read_fw_status_reg(instance->reg_set);
3481
3482                         if (abs_state == curr_abs_state) {
3483                                 msleep(1);
3484                         } else
3485                                 break;
3486                 }
3487
3488                 /*
3489                  * Return error if fw_state hasn't changed after max_wait
3490                  */
3491                 if (curr_abs_state == abs_state) {
3492                         printk(KERN_DEBUG "FW state [%d] hasn't changed "
3493                                "in %d secs\n", fw_state, max_wait);
3494                         return -ENODEV;
3495                 }
3496
3497                 abs_state = curr_abs_state;
3498                 fw_state = curr_abs_state & MFI_STATE_MASK;
3499         }
3500         printk(KERN_INFO "megasas: FW now in Ready state\n");
3501
3502         return 0;
3503 }
3504
3505 /**
3506  * megasas_teardown_frame_pool -        Destroy the cmd frame DMA pool
3507  * @instance:                           Adapter soft state
3508  */
3509 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
3510 {
3511         int i;
3512         u32 max_cmd = instance->max_mfi_cmds;
3513         struct megasas_cmd *cmd;
3514
3515         if (!instance->frame_dma_pool)
3516                 return;
3517
3518         /*
3519          * Return all frames to pool
3520          */
3521         for (i = 0; i < max_cmd; i++) {
3522
3523                 cmd = instance->cmd_list[i];
3524
3525                 if (cmd->frame)
3526                         pci_pool_free(instance->frame_dma_pool, cmd->frame,
3527                                       cmd->frame_phys_addr);
3528
3529                 if (cmd->sense)
3530                         pci_pool_free(instance->sense_dma_pool, cmd->sense,
3531                                       cmd->sense_phys_addr);
3532         }
3533
3534         /*
3535          * Now destroy the pool itself
3536          */
3537         pci_pool_destroy(instance->frame_dma_pool);
3538         pci_pool_destroy(instance->sense_dma_pool);
3539
3540         instance->frame_dma_pool = NULL;
3541         instance->sense_dma_pool = NULL;
3542 }
3543
3544 /**
3545  * megasas_create_frame_pool -  Creates DMA pool for cmd frames
3546  * @instance:                   Adapter soft state
3547  *
3548  * Each command packet has an embedded DMA memory buffer that is used for
3549  * filling MFI frame and the SG list that immediately follows the frame. This
3550  * function creates those DMA memory buffers for each command packet by using
3551  * PCI pool facility.
3552  */
3553 static int megasas_create_frame_pool(struct megasas_instance *instance)
3554 {
3555         int i;
3556         u32 max_cmd;
3557         u32 sge_sz;
3558         u32 sgl_sz;
3559         u32 total_sz;
3560         u32 frame_count;
3561         struct megasas_cmd *cmd;
3562
3563         max_cmd = instance->max_mfi_cmds;
3564
3565         /*
3566          * Size of our frame is 64 bytes for MFI frame, followed by max SG
3567          * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
3568          */
3569         sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
3570             sizeof(struct megasas_sge32);
3571
3572         if (instance->flag_ieee) {
3573                 sge_sz = sizeof(struct megasas_sge_skinny);
3574         }
3575
3576         /*
3577          * Calculated the number of 64byte frames required for SGL
3578          */
3579         sgl_sz = sge_sz * instance->max_num_sge;
3580         frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
3581         frame_count = 15;
3582
3583         /*
3584          * We need one extra frame for the MFI command
3585          */
3586         frame_count++;
3587
3588         total_sz = MEGAMFI_FRAME_SIZE * frame_count;
3589         /*
3590          * Use DMA pool facility provided by PCI layer
3591          */
3592         instance->frame_dma_pool = pci_pool_create("megasas frame pool",
3593                                                    instance->pdev, total_sz, 64,
3594                                                    0);
3595
3596         if (!instance->frame_dma_pool) {
3597                 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
3598                 return -ENOMEM;
3599         }
3600
3601         instance->sense_dma_pool = pci_pool_create("megasas sense pool",
3602                                                    instance->pdev, 128, 4, 0);
3603
3604         if (!instance->sense_dma_pool) {
3605                 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
3606
3607                 pci_pool_destroy(instance->frame_dma_pool);
3608                 instance->frame_dma_pool = NULL;
3609
3610                 return -ENOMEM;
3611         }
3612
3613         /*
3614          * Allocate and attach a frame to each of the commands in cmd_list.
3615          * By making cmd->index as the context instead of the &cmd, we can
3616          * always use 32bit context regardless of the architecture
3617          */
3618         for (i = 0; i < max_cmd; i++) {
3619
3620                 cmd = instance->cmd_list[i];
3621
3622                 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
3623                                             GFP_KERNEL, &cmd->frame_phys_addr);
3624
3625                 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
3626                                             GFP_KERNEL, &cmd->sense_phys_addr);
3627
3628                 /*
3629                  * megasas_teardown_frame_pool() takes care of freeing
3630                  * whatever has been allocated
3631                  */
3632                 if (!cmd->frame || !cmd->sense) {
3633                         printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
3634                         megasas_teardown_frame_pool(instance);
3635                         return -ENOMEM;
3636                 }
3637
3638                 memset(cmd->frame, 0, total_sz);
3639                 cmd->frame->io.context = cpu_to_le32(cmd->index);
3640                 cmd->frame->io.pad_0 = 0;
3641                 if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
3642                     (instance->pdev->device != PCI_DEVICE_ID_LSI_PLASMA) &&
3643                     (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
3644                         (instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
3645                     (reset_devices))
3646                         cmd->frame->hdr.cmd = MFI_CMD_INVALID;
3647         }
3648
3649         return 0;
3650 }
3651
3652 /**
3653  * megasas_free_cmds -  Free all the cmds in the free cmd pool
3654  * @instance:           Adapter soft state
3655  */
3656 void megasas_free_cmds(struct megasas_instance *instance)
3657 {
3658         int i;
3659         /* First free the MFI frame pool */
3660         megasas_teardown_frame_pool(instance);
3661
3662         /* Free all the commands in the cmd_list */
3663         for (i = 0; i < instance->max_mfi_cmds; i++)
3664
3665                 kfree(instance->cmd_list[i]);
3666
3667         /* Free the cmd_list buffer itself */
3668         kfree(instance->cmd_list);
3669         instance->cmd_list = NULL;
3670
3671         INIT_LIST_HEAD(&instance->cmd_pool);
3672 }
3673
3674 /**
3675  * megasas_alloc_cmds - Allocates the command packets
3676  * @instance:           Adapter soft state
3677  *
3678  * Each command that is issued to the FW, whether IO commands from the OS or
3679  * internal commands like IOCTLs, are wrapped in local data structure called
3680  * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
3681  * the FW.
3682  *
3683  * Each frame has a 32-bit field called context (tag). This context is used
3684  * to get back the megasas_cmd from the frame when a frame gets completed in
3685  * the ISR. Typically the address of the megasas_cmd itself would be used as
3686  * the context. But we wanted to keep the differences between 32 and 64 bit
3687  * systems to the mininum. We always use 32 bit integers for the context. In
3688  * this driver, the 32 bit values are the indices into an array cmd_list.
3689  * This array is used only to look up the megasas_cmd given the context. The
3690  * free commands themselves are maintained in a linked list called cmd_pool.
3691  */
3692 int megasas_alloc_cmds(struct megasas_instance *instance)
3693 {
3694         int i;
3695         int j;
3696         u32 max_cmd;
3697         struct megasas_cmd *cmd;
3698         struct fusion_context *fusion;
3699
3700         fusion = instance->ctrl_context;
3701         max_cmd = instance->max_mfi_cmds;
3702
3703         /*
3704          * instance->cmd_list is an array of struct megasas_cmd pointers.
3705          * Allocate the dynamic array first and then allocate individual
3706          * commands.
3707          */
3708         instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL);
3709
3710         if (!instance->cmd_list) {
3711                 printk(KERN_DEBUG "megasas: out of memory\n");
3712                 return -ENOMEM;
3713         }
3714
3715         memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);
3716
3717         for (i = 0; i < max_cmd; i++) {
3718                 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
3719                                                 GFP_KERNEL);
3720
3721                 if (!instance->cmd_list[i]) {
3722
3723                         for (j = 0; j < i; j++)
3724                                 kfree(instance->cmd_list[j]);
3725
3726                         kfree(instance->cmd_list);
3727                         instance->cmd_list = NULL;
3728
3729                         return -ENOMEM;
3730                 }
3731         }
3732
3733         for (i = 0; i < max_cmd; i++) {
3734                 cmd = instance->cmd_list[i];
3735                 memset(cmd, 0, sizeof(struct megasas_cmd));
3736                 cmd->index = i;
3737                 atomic_set(&cmd->mfi_mpt_pthr, MFI_LIST_ADDED);
3738                 cmd->scmd = NULL;
3739                 cmd->instance = instance;
3740
3741                 list_add_tail(&cmd->list, &instance->cmd_pool);
3742         }
3743
3744         /*
3745          * Create a frame pool and assign one frame to each cmd
3746          */
3747         if (megasas_create_frame_pool(instance)) {
3748                 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
3749                 megasas_free_cmds(instance);
3750         }
3751
3752         return 0;
3753 }
3754
3755 /*
3756  * megasas_get_pd_list_info -   Returns FW's pd_list structure
3757  * @instance:                           Adapter soft state
3758  * @pd_list:                            pd_list structure
3759  *
3760  * Issues an internal command (DCMD) to get the FW's controller PD
3761  * list structure.  This information is mainly used to find out SYSTEM
3762  * supported by the FW.
3763  */
3764 static int
3765 megasas_get_pd_list(struct megasas_instance *instance)
3766 {
3767         int ret = 0, pd_index = 0;
3768         struct megasas_cmd *cmd;
3769         struct megasas_dcmd_frame *dcmd;
3770         struct MR_PD_LIST *ci;
3771         struct MR_PD_ADDRESS *pd_addr;
3772         dma_addr_t ci_h = 0;
3773
3774         cmd = megasas_get_cmd(instance);
3775
3776         if (!cmd) {
3777                 printk(KERN_DEBUG "megasas (get_pd_list): Failed to get cmd\n");
3778                 return -ENOMEM;
3779         }
3780
3781         dcmd = &cmd->frame->dcmd;
3782
3783         ci = pci_alloc_consistent(instance->pdev,
3784                   MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST), &ci_h);
3785
3786         if (!ci) {
3787                 printk(KERN_DEBUG "Failed to alloc mem for pd_list\n");
3788                 megasas_return_cmd(instance, cmd);
3789                 return -ENOMEM;
3790         }
3791
3792         memset(ci, 0, sizeof(*ci));
3793         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3794
3795         dcmd->mbox.b[0] = MR_PD_QUERY_TYPE_EXPOSED_TO_HOST;
3796         dcmd->mbox.b[1] = 0;
3797         dcmd->cmd = MFI_CMD_DCMD;
3798         dcmd->cmd_status = 0xFF;
3799         dcmd->sge_count = 1;
3800         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3801         dcmd->timeout = 0;
3802         dcmd->pad_0 = 0;
3803         dcmd->data_xfer_len = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
3804         dcmd->opcode = cpu_to_le32(MR_DCMD_PD_LIST_QUERY);
3805         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3806         dcmd->sgl.sge32[0].length = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
3807
3808         if (instance->ctrl_context && !instance->mask_interrupts)
3809                 ret = megasas_issue_blocked_cmd(instance, cmd,
3810                         MEGASAS_BLOCKED_CMD_TIMEOUT);
3811         else
3812                 ret = megasas_issue_polled(instance, cmd);
3813
3814         /*
3815         * the following function will get the instance PD LIST.
3816         */
3817
3818         pd_addr = ci->addr;
3819
3820         if ( ret == 0 &&
3821              (le32_to_cpu(ci->count) <
3822                   (MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL))) {
3823
3824                 memset(instance->local_pd_list, 0,
3825                         MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));
3826
3827                 for (pd_index = 0; pd_index < le32_to_cpu(ci->count); pd_index++) {
3828
3829                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].tid     =
3830                                 le16_to_cpu(pd_addr->deviceId);
3831                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveType       =
3832                                                         pd_addr->scsiDevType;
3833                         instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveState      =
3834                                                         MR_PD_STATE_SYSTEM;
3835                         pd_addr++;
3836                 }
3837                 memcpy(instance->pd_list, instance->local_pd_list,
3838                         sizeof(instance->pd_list));
3839         }
3840
3841         pci_free_consistent(instance->pdev,
3842                                 MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
3843                                 ci, ci_h);
3844
3845         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
3846                 megasas_return_mfi_mpt_pthr(instance, cmd,
3847                         cmd->mpt_pthr_cmd_blocked);
3848         else
3849                 megasas_return_cmd(instance, cmd);
3850
3851         return ret;
3852 }
3853
3854 /*
3855  * megasas_get_ld_list_info -   Returns FW's ld_list structure
3856  * @instance:                           Adapter soft state
3857  * @ld_list:                            ld_list structure
3858  *
3859  * Issues an internal command (DCMD) to get the FW's controller PD
3860  * list structure.  This information is mainly used to find out SYSTEM
3861  * supported by the FW.
3862  */
3863 static int
3864 megasas_get_ld_list(struct megasas_instance *instance)
3865 {
3866         int ret = 0, ld_index = 0, ids = 0;
3867         struct megasas_cmd *cmd;
3868         struct megasas_dcmd_frame *dcmd;
3869         struct MR_LD_LIST *ci;
3870         dma_addr_t ci_h = 0;
3871         u32 ld_count;
3872
3873         cmd = megasas_get_cmd(instance);
3874
3875         if (!cmd) {
3876                 printk(KERN_DEBUG "megasas_get_ld_list: Failed to get cmd\n");
3877                 return -ENOMEM;
3878         }
3879
3880         dcmd = &cmd->frame->dcmd;
3881
3882         ci = pci_alloc_consistent(instance->pdev,
3883                                 sizeof(struct MR_LD_LIST),
3884                                 &ci_h);
3885
3886         if (!ci) {
3887                 printk(KERN_DEBUG "Failed to alloc mem in get_ld_list\n");
3888                 megasas_return_cmd(instance, cmd);
3889                 return -ENOMEM;
3890         }
3891
3892         memset(ci, 0, sizeof(*ci));
3893         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3894
3895         if (instance->supportmax256vd)
3896                 dcmd->mbox.b[0] = 1;
3897         dcmd->cmd = MFI_CMD_DCMD;
3898         dcmd->cmd_status = 0xFF;
3899         dcmd->sge_count = 1;
3900         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3901         dcmd->timeout = 0;
3902         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_LIST));
3903         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_GET_LIST);
3904         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3905         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_LIST));
3906         dcmd->pad_0  = 0;
3907
3908         if (instance->ctrl_context && !instance->mask_interrupts)
3909                 ret = megasas_issue_blocked_cmd(instance, cmd,
3910                         MEGASAS_BLOCKED_CMD_TIMEOUT);
3911         else
3912                 ret = megasas_issue_polled(instance, cmd);
3913
3914
3915         ld_count = le32_to_cpu(ci->ldCount);
3916
3917         /* the following function will get the instance PD LIST */
3918
3919         if ((ret == 0) && (ld_count <= instance->fw_supported_vd_count)) {
3920                 memset(instance->ld_ids, 0xff, MAX_LOGICAL_DRIVES_EXT);
3921
3922                 for (ld_index = 0; ld_index < ld_count; ld_index++) {
3923                         if (ci->ldList[ld_index].state != 0) {
3924                                 ids = ci->ldList[ld_index].ref.targetId;
3925                                 instance->ld_ids[ids] =
3926                                         ci->ldList[ld_index].ref.targetId;
3927                         }
3928                 }
3929         }
3930
3931         pci_free_consistent(instance->pdev,
3932                                 sizeof(struct MR_LD_LIST),
3933                                 ci,
3934                                 ci_h);
3935
3936         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
3937                 megasas_return_mfi_mpt_pthr(instance, cmd,
3938                         cmd->mpt_pthr_cmd_blocked);
3939         else
3940                 megasas_return_cmd(instance, cmd);
3941         return ret;
3942 }
3943
3944 /**
3945  * megasas_ld_list_query -      Returns FW's ld_list structure
3946  * @instance:                           Adapter soft state
3947  * @ld_list:                            ld_list structure
3948  *
3949  * Issues an internal command (DCMD) to get the FW's controller PD
3950  * list structure.  This information is mainly used to find out SYSTEM
3951  * supported by the FW.
3952  */
3953 static int
3954 megasas_ld_list_query(struct megasas_instance *instance, u8 query_type)
3955 {
3956         int ret = 0, ld_index = 0, ids = 0;
3957         struct megasas_cmd *cmd;
3958         struct megasas_dcmd_frame *dcmd;
3959         struct MR_LD_TARGETID_LIST *ci;
3960         dma_addr_t ci_h = 0;
3961         u32 tgtid_count;
3962
3963         cmd = megasas_get_cmd(instance);
3964
3965         if (!cmd) {
3966                 printk(KERN_WARNING
3967                        "megasas:(megasas_ld_list_query): Failed to get cmd\n");
3968                 return -ENOMEM;
3969         }
3970
3971         dcmd = &cmd->frame->dcmd;
3972
3973         ci = pci_alloc_consistent(instance->pdev,
3974                                   sizeof(struct MR_LD_TARGETID_LIST), &ci_h);
3975
3976         if (!ci) {
3977                 printk(KERN_WARNING
3978                        "megasas: Failed to alloc mem for ld_list_query\n");
3979                 megasas_return_cmd(instance, cmd);
3980                 return -ENOMEM;
3981         }
3982
3983         memset(ci, 0, sizeof(*ci));
3984         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
3985
3986         dcmd->mbox.b[0] = query_type;
3987         if (instance->supportmax256vd)
3988                 dcmd->mbox.b[2] = 1;
3989
3990         dcmd->cmd = MFI_CMD_DCMD;
3991         dcmd->cmd_status = 0xFF;
3992         dcmd->sge_count = 1;
3993         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
3994         dcmd->timeout = 0;
3995         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
3996         dcmd->opcode = cpu_to_le32(MR_DCMD_LD_LIST_QUERY);
3997         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
3998         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
3999         dcmd->pad_0  = 0;
4000
4001         if (instance->ctrl_context && !instance->mask_interrupts)
4002                 ret = megasas_issue_blocked_cmd(instance, cmd,
4003                         MEGASAS_BLOCKED_CMD_TIMEOUT);
4004         else
4005                 ret = megasas_issue_polled(instance, cmd);
4006
4007         tgtid_count = le32_to_cpu(ci->count);
4008
4009         if ((ret == 0) && (tgtid_count <= (instance->fw_supported_vd_count))) {
4010                 memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
4011                 for (ld_index = 0; ld_index < tgtid_count; ld_index++) {
4012                         ids = ci->targetId[ld_index];
4013                         instance->ld_ids[ids] = ci->targetId[ld_index];
4014                 }
4015
4016         }
4017
4018         pci_free_consistent(instance->pdev, sizeof(struct MR_LD_TARGETID_LIST),
4019                             ci, ci_h);
4020
4021         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4022                 megasas_return_mfi_mpt_pthr(instance, cmd,
4023                         cmd->mpt_pthr_cmd_blocked);
4024         else
4025                 megasas_return_cmd(instance, cmd);
4026
4027         return ret;
4028 }
4029
4030 /**
4031  * megasas_get_controller_info -        Returns FW's controller structure
4032  * @instance:                           Adapter soft state
4033  * @ctrl_info:                          Controller information structure
4034  *
4035  * Issues an internal command (DCMD) to get the FW's controller structure.
4036  * This information is mainly used to find out the maximum IO transfer per
4037  * command supported by the FW.
4038  */
4039 int
4040 megasas_get_ctrl_info(struct megasas_instance *instance,
4041                       struct megasas_ctrl_info *ctrl_info)
4042 {
4043         int ret = 0;
4044         struct megasas_cmd *cmd;
4045         struct megasas_dcmd_frame *dcmd;
4046         struct megasas_ctrl_info *ci;
4047         dma_addr_t ci_h = 0;
4048
4049         cmd = megasas_get_cmd(instance);
4050
4051         if (!cmd) {
4052                 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
4053                 return -ENOMEM;
4054         }
4055
4056         dcmd = &cmd->frame->dcmd;
4057
4058         ci = pci_alloc_consistent(instance->pdev,
4059                                   sizeof(struct megasas_ctrl_info), &ci_h);
4060
4061         if (!ci) {
4062                 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
4063                 megasas_return_cmd(instance, cmd);
4064                 return -ENOMEM;
4065         }
4066
4067         memset(ci, 0, sizeof(*ci));
4068         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4069
4070         dcmd->cmd = MFI_CMD_DCMD;
4071         dcmd->cmd_status = 0xFF;
4072         dcmd->sge_count = 1;
4073         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4074         dcmd->timeout = 0;
4075         dcmd->pad_0 = 0;
4076         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_ctrl_info));
4077         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_GET_INFO);
4078         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
4079         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_ctrl_info));
4080         dcmd->mbox.b[0] = 1;
4081
4082         if (instance->ctrl_context && !instance->mask_interrupts)
4083                 ret = megasas_issue_blocked_cmd(instance, cmd,
4084                         MEGASAS_BLOCKED_CMD_TIMEOUT);
4085         else
4086                 ret = megasas_issue_polled(instance, cmd);
4087
4088         if (!ret)
4089                 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
4090
4091         pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
4092                             ci, ci_h);
4093
4094         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4095                 megasas_return_mfi_mpt_pthr(instance, cmd,
4096                         cmd->mpt_pthr_cmd_blocked);
4097         else
4098                 megasas_return_cmd(instance, cmd);
4099         return ret;
4100 }
4101
4102 /*
4103  * megasas_set_crash_dump_params -      Sends address of crash dump DMA buffer
4104  *                                      to firmware
4105  *
4106  * @instance:                           Adapter soft state
4107  * @crash_buf_state             -       tell FW to turn ON/OFF crash dump feature
4108                                         MR_CRASH_BUF_TURN_OFF = 0
4109                                         MR_CRASH_BUF_TURN_ON = 1
4110  * @return 0 on success non-zero on failure.
4111  * Issues an internal command (DCMD) to set parameters for crash dump feature.
4112  * Driver will send address of crash dump DMA buffer and set mbox to tell FW
4113  * that driver supports crash dump feature. This DCMD will be sent only if
4114  * crash dump feature is supported by the FW.
4115  *
4116  */
4117 int megasas_set_crash_dump_params(struct megasas_instance *instance,
4118         u8 crash_buf_state)
4119 {
4120         int ret = 0;
4121         struct megasas_cmd *cmd;
4122         struct megasas_dcmd_frame *dcmd;
4123
4124         cmd = megasas_get_cmd(instance);
4125
4126         if (!cmd) {
4127                 dev_err(&instance->pdev->dev, "Failed to get a free cmd\n");
4128                 return -ENOMEM;
4129         }
4130
4131
4132         dcmd = &cmd->frame->dcmd;
4133
4134         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4135         dcmd->mbox.b[0] = crash_buf_state;
4136         dcmd->cmd = MFI_CMD_DCMD;
4137         dcmd->cmd_status = 0xFF;
4138         dcmd->sge_count = 1;
4139         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
4140         dcmd->timeout = 0;
4141         dcmd->pad_0 = 0;
4142         dcmd->data_xfer_len = cpu_to_le32(CRASH_DMA_BUF_SIZE);
4143         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_SET_CRASH_DUMP_PARAMS);
4144         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(instance->crash_dump_h);
4145         dcmd->sgl.sge32[0].length = cpu_to_le32(CRASH_DMA_BUF_SIZE);
4146
4147         if (instance->ctrl_context && !instance->mask_interrupts)
4148                 ret = megasas_issue_blocked_cmd(instance, cmd,
4149                         MEGASAS_BLOCKED_CMD_TIMEOUT);
4150         else
4151                 ret = megasas_issue_polled(instance, cmd);
4152
4153         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4154                 megasas_return_mfi_mpt_pthr(instance, cmd,
4155                         cmd->mpt_pthr_cmd_blocked);
4156         else
4157                 megasas_return_cmd(instance, cmd);
4158         return ret;
4159 }
4160
4161 /**
4162  * megasas_issue_init_mfi -     Initializes the FW
4163  * @instance:           Adapter soft state
4164  *
4165  * Issues the INIT MFI cmd
4166  */
4167 static int
4168 megasas_issue_init_mfi(struct megasas_instance *instance)
4169 {
4170         u32 context;
4171
4172         struct megasas_cmd *cmd;
4173
4174         struct megasas_init_frame *init_frame;
4175         struct megasas_init_queue_info *initq_info;
4176         dma_addr_t init_frame_h;
4177         dma_addr_t initq_info_h;
4178
4179         /*
4180          * Prepare a init frame. Note the init frame points to queue info
4181          * structure. Each frame has SGL allocated after first 64 bytes. For
4182          * this frame - since we don't need any SGL - we use SGL's space as
4183          * queue info structure
4184          *
4185          * We will not get a NULL command below. We just created the pool.
4186          */
4187         cmd = megasas_get_cmd(instance);
4188
4189         init_frame = (struct megasas_init_frame *)cmd->frame;
4190         initq_info = (struct megasas_init_queue_info *)
4191                 ((unsigned long)init_frame + 64);
4192
4193         init_frame_h = cmd->frame_phys_addr;
4194         initq_info_h = init_frame_h + 64;
4195
4196         context = init_frame->context;
4197         memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
4198         memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
4199         init_frame->context = context;
4200
4201         initq_info->reply_queue_entries = cpu_to_le32(instance->max_fw_cmds + 1);
4202         initq_info->reply_queue_start_phys_addr_lo = cpu_to_le32(instance->reply_queue_h);
4203
4204         initq_info->producer_index_phys_addr_lo = cpu_to_le32(instance->producer_h);
4205         initq_info->consumer_index_phys_addr_lo = cpu_to_le32(instance->consumer_h);
4206
4207         init_frame->cmd = MFI_CMD_INIT;
4208         init_frame->cmd_status = 0xFF;
4209         init_frame->queue_info_new_phys_addr_lo =
4210                 cpu_to_le32(lower_32_bits(initq_info_h));
4211         init_frame->queue_info_new_phys_addr_hi =
4212                 cpu_to_le32(upper_32_bits(initq_info_h));
4213
4214         init_frame->data_xfer_len = cpu_to_le32(sizeof(struct megasas_init_queue_info));
4215
4216         /*
4217          * disable the intr before firing the init frame to FW
4218          */
4219         instance->instancet->disable_intr(instance);
4220
4221         /*
4222          * Issue the init frame in polled mode
4223          */
4224
4225         if (megasas_issue_polled(instance, cmd)) {
4226                 printk(KERN_ERR "megasas: Failed to init firmware\n");
4227                 megasas_return_cmd(instance, cmd);
4228                 goto fail_fw_init;
4229         }
4230
4231         megasas_return_cmd(instance, cmd);
4232
4233         return 0;
4234
4235 fail_fw_init:
4236         return -EINVAL;
4237 }
4238
4239 static u32
4240 megasas_init_adapter_mfi(struct megasas_instance *instance)
4241 {
4242         struct megasas_register_set __iomem *reg_set;
4243         u32 context_sz;
4244         u32 reply_q_sz;
4245
4246         reg_set = instance->reg_set;
4247
4248         /*
4249          * Get various operational parameters from status register
4250          */
4251         instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
4252         /*
4253          * Reduce the max supported cmds by 1. This is to ensure that the
4254          * reply_q_sz (1 more than the max cmd that driver may send)
4255          * does not exceed max cmds that the FW can support
4256          */
4257         instance->max_fw_cmds = instance->max_fw_cmds-1;
4258         instance->max_mfi_cmds = instance->max_fw_cmds;
4259         instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
4260                                         0x10;
4261         /*
4262          * Create a pool of commands
4263          */
4264         if (megasas_alloc_cmds(instance))
4265                 goto fail_alloc_cmds;
4266
4267         /*
4268          * Allocate memory for reply queue. Length of reply queue should
4269          * be _one_ more than the maximum commands handled by the firmware.
4270          *
4271          * Note: When FW completes commands, it places corresponding contex
4272          * values in this circular reply queue. This circular queue is a fairly
4273          * typical producer-consumer queue. FW is the producer (of completed
4274          * commands) and the driver is the consumer.
4275          */
4276         context_sz = sizeof(u32);
4277         reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
4278
4279         instance->reply_queue = pci_alloc_consistent(instance->pdev,
4280                                                      reply_q_sz,
4281                                                      &instance->reply_queue_h);
4282
4283         if (!instance->reply_queue) {
4284                 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
4285                 goto fail_reply_queue;
4286         }
4287
4288         if (megasas_issue_init_mfi(instance))
4289                 goto fail_fw_init;
4290
4291         if (megasas_get_ctrl_info(instance, instance->ctrl_info)) {
4292                 dev_err(&instance->pdev->dev, "(%d): Could get controller info "
4293                         "Fail from %s %d\n", instance->unique_id,
4294                         __func__, __LINE__);
4295                 goto fail_fw_init;
4296         }
4297
4298         instance->fw_support_ieee = 0;
4299         instance->fw_support_ieee =
4300                 (instance->instancet->read_fw_status_reg(reg_set) &
4301                 0x04000000);
4302
4303         printk(KERN_NOTICE "megasas_init_mfi: fw_support_ieee=%d",
4304                         instance->fw_support_ieee);
4305
4306         if (instance->fw_support_ieee)
4307                 instance->flag_ieee = 1;
4308
4309         return 0;
4310
4311 fail_fw_init:
4312
4313         pci_free_consistent(instance->pdev, reply_q_sz,
4314                             instance->reply_queue, instance->reply_queue_h);
4315 fail_reply_queue:
4316         megasas_free_cmds(instance);
4317
4318 fail_alloc_cmds:
4319         return 1;
4320 }
4321
4322 /**
4323  * megasas_init_fw -    Initializes the FW
4324  * @instance:           Adapter soft state
4325  *
4326  * This is the main function for initializing firmware
4327  */
4328
4329 static int megasas_init_fw(struct megasas_instance *instance)
4330 {
4331         u32 max_sectors_1;
4332         u32 max_sectors_2;
4333         u32 tmp_sectors, msix_enable, scratch_pad_2;
4334         resource_size_t base_addr;
4335         struct megasas_register_set __iomem *reg_set;
4336         struct megasas_ctrl_info *ctrl_info = NULL;
4337         unsigned long bar_list;
4338         int i, loop, fw_msix_count = 0;
4339         struct IOV_111 *iovPtr;
4340
4341         /* Find first memory bar */
4342         bar_list = pci_select_bars(instance->pdev, IORESOURCE_MEM);
4343         instance->bar = find_first_bit(&bar_list, sizeof(unsigned long));
4344         if (pci_request_selected_regions(instance->pdev, instance->bar,
4345                                          "megasas: LSI")) {
4346                 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
4347                 return -EBUSY;
4348         }
4349
4350         base_addr = pci_resource_start(instance->pdev, instance->bar);
4351         instance->reg_set = ioremap_nocache(base_addr, 8192);
4352
4353         if (!instance->reg_set) {
4354                 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
4355                 goto fail_ioremap;
4356         }
4357
4358         reg_set = instance->reg_set;
4359
4360         switch (instance->pdev->device) {
4361         case PCI_DEVICE_ID_LSI_FUSION:
4362         case PCI_DEVICE_ID_LSI_PLASMA:
4363         case PCI_DEVICE_ID_LSI_INVADER:
4364         case PCI_DEVICE_ID_LSI_FURY:
4365                 instance->instancet = &megasas_instance_template_fusion;
4366                 break;
4367         case PCI_DEVICE_ID_LSI_SAS1078R:
4368         case PCI_DEVICE_ID_LSI_SAS1078DE:
4369                 instance->instancet = &megasas_instance_template_ppc;
4370                 break;
4371         case PCI_DEVICE_ID_LSI_SAS1078GEN2:
4372         case PCI_DEVICE_ID_LSI_SAS0079GEN2:
4373                 instance->instancet = &megasas_instance_template_gen2;
4374                 break;
4375         case PCI_DEVICE_ID_LSI_SAS0073SKINNY:
4376         case PCI_DEVICE_ID_LSI_SAS0071SKINNY:
4377                 instance->instancet = &megasas_instance_template_skinny;
4378                 break;
4379         case PCI_DEVICE_ID_LSI_SAS1064R:
4380         case PCI_DEVICE_ID_DELL_PERC5:
4381         default:
4382                 instance->instancet = &megasas_instance_template_xscale;
4383                 break;
4384         }
4385
4386         if (megasas_transition_to_ready(instance, 0)) {
4387                 atomic_set(&instance->fw_reset_no_pci_access, 1);
4388                 instance->instancet->adp_reset
4389                         (instance, instance->reg_set);
4390                 atomic_set(&instance->fw_reset_no_pci_access, 0);
4391                 dev_info(&instance->pdev->dev,
4392                         "megasas: FW restarted successfully from %s!\n",
4393                         __func__);
4394
4395                 /*waitting for about 30 second before retry*/
4396                 ssleep(30);
4397
4398                 if (megasas_transition_to_ready(instance, 0))
4399                         goto fail_ready_state;
4400         }
4401
4402         /*
4403          * MSI-X host index 0 is common for all adapter.
4404          * It is used for all MPT based Adapters.
4405          */
4406         instance->reply_post_host_index_addr[0] =
4407                 (u32 *)((u8 *)instance->reg_set +
4408                 MPI2_REPLY_POST_HOST_INDEX_OFFSET);
4409
4410         /* Check if MSI-X is supported while in ready state */
4411         msix_enable = (instance->instancet->read_fw_status_reg(reg_set) &
4412                        0x4000000) >> 0x1a;
4413         if (msix_enable && !msix_disable) {
4414                 scratch_pad_2 = readl
4415                         (&instance->reg_set->outbound_scratch_pad_2);
4416                 /* Check max MSI-X vectors */
4417                 if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
4418                     (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA)) {
4419                         instance->msix_vectors = (scratch_pad_2
4420                                 & MR_MAX_REPLY_QUEUES_OFFSET) + 1;
4421                         fw_msix_count = instance->msix_vectors;
4422                         if (msix_vectors)
4423                                 instance->msix_vectors =
4424                                         min(msix_vectors,
4425                                             instance->msix_vectors);
4426                 } else if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER)
4427                         || (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
4428                         /* Invader/Fury supports more than 8 MSI-X */
4429                         instance->msix_vectors = ((scratch_pad_2
4430                                 & MR_MAX_REPLY_QUEUES_EXT_OFFSET)
4431                                 >> MR_MAX_REPLY_QUEUES_EXT_OFFSET_SHIFT) + 1;
4432                         fw_msix_count = instance->msix_vectors;
4433                         /* Save 1-15 reply post index address to local memory
4434                          * Index 0 is already saved from reg offset
4435                          * MPI2_REPLY_POST_HOST_INDEX_OFFSET
4436                          */
4437                         for (loop = 1; loop < MR_MAX_MSIX_REG_ARRAY; loop++) {
4438                                 instance->reply_post_host_index_addr[loop] =
4439                                         (u32 *)((u8 *)instance->reg_set +
4440                                         MPI2_SUP_REPLY_POST_HOST_INDEX_OFFSET
4441                                         + (loop * 0x10));
4442                         }
4443                         if (msix_vectors)
4444                                 instance->msix_vectors = min(msix_vectors,
4445                                         instance->msix_vectors);
4446                 } else
4447                         instance->msix_vectors = 1;
4448                 /* Don't bother allocating more MSI-X vectors than cpus */
4449                 instance->msix_vectors = min(instance->msix_vectors,
4450                                              (unsigned int)num_online_cpus());
4451                 for (i = 0; i < instance->msix_vectors; i++)
4452                         instance->msixentry[i].entry = i;
4453                 i = pci_enable_msix_range(instance->pdev, instance->msixentry,
4454                                           1, instance->msix_vectors);
4455                 if (i > 0)
4456                         instance->msix_vectors = i;
4457                 else
4458                         instance->msix_vectors = 0;
4459
4460                 dev_info(&instance->pdev->dev, "[scsi%d]: FW supports"
4461                         "<%d> MSIX vector,Online CPUs: <%d>,"
4462                         "Current MSIX <%d>\n", instance->host->host_no,
4463                         fw_msix_count, (unsigned int)num_online_cpus(),
4464                         instance->msix_vectors);
4465         }
4466
4467         instance->ctrl_info = kzalloc(sizeof(struct megasas_ctrl_info),
4468                                 GFP_KERNEL);
4469         if (instance->ctrl_info == NULL)
4470                 goto fail_init_adapter;
4471
4472         /*
4473          * Below are default value for legacy Firmware.
4474          * non-fusion based controllers
4475          */
4476         instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES;
4477         instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
4478         /* Get operational params, sge flags, send init cmd to controller */
4479         if (instance->instancet->init_adapter(instance))
4480                 goto fail_init_adapter;
4481
4482         printk(KERN_ERR "megasas: INIT adapter done\n");
4483
4484         /** for passthrough
4485         * the following function will get the PD LIST.
4486         */
4487
4488         memset(instance->pd_list, 0 ,
4489                 (MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)));
4490         if (megasas_get_pd_list(instance) < 0) {
4491                 printk(KERN_ERR "megasas: failed to get PD list\n");
4492                 goto fail_init_adapter;
4493         }
4494
4495         memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
4496         if (megasas_ld_list_query(instance,
4497                                   MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
4498                 megasas_get_ld_list(instance);
4499
4500         /*
4501          * Compute the max allowed sectors per IO: The controller info has two
4502          * limits on max sectors. Driver should use the minimum of these two.
4503          *
4504          * 1 << stripe_sz_ops.min = max sectors per strip
4505          *
4506          * Note that older firmwares ( < FW ver 30) didn't report information
4507          * to calculate max_sectors_1. So the number ended up as zero always.
4508          */
4509         tmp_sectors = 0;
4510         ctrl_info = instance->ctrl_info;
4511
4512         max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
4513                 le16_to_cpu(ctrl_info->max_strips_per_io);
4514         max_sectors_2 = le32_to_cpu(ctrl_info->max_request_size);
4515
4516         tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2);
4517
4518         /*Check whether controller is iMR or MR */
4519         if (ctrl_info->memory_size) {
4520                 instance->is_imr = 0;
4521                 dev_info(&instance->pdev->dev, "Controller type: MR,"
4522                         "Memory size is: %dMB\n",
4523                         le16_to_cpu(ctrl_info->memory_size));
4524         } else {
4525                 instance->is_imr = 1;
4526                 dev_info(&instance->pdev->dev,
4527                         "Controller type: iMR\n");
4528         }
4529         /* OnOffProperties are converted into CPU arch*/
4530         le32_to_cpus((u32 *)&ctrl_info->properties.OnOffProperties);
4531         instance->disableOnlineCtrlReset =
4532         ctrl_info->properties.OnOffProperties.disableOnlineCtrlReset;
4533         /* adapterOperations2 are converted into CPU arch*/
4534         le32_to_cpus((u32 *)&ctrl_info->adapterOperations2);
4535         instance->mpio = ctrl_info->adapterOperations2.mpio;
4536         instance->UnevenSpanSupport =
4537                 ctrl_info->adapterOperations2.supportUnevenSpans;
4538         if (instance->UnevenSpanSupport) {
4539                 struct fusion_context *fusion = instance->ctrl_context;
4540
4541                 dev_info(&instance->pdev->dev, "FW supports: "
4542                 "UnevenSpanSupport=%x\n", instance->UnevenSpanSupport);
4543                 if (MR_ValidateMapInfo(instance))
4544                         fusion->fast_path_io = 1;
4545                 else
4546                         fusion->fast_path_io = 0;
4547
4548         }
4549         if (ctrl_info->host_interface.SRIOV) {
4550                 if (!ctrl_info->adapterOperations2.activePassive)
4551                         instance->PlasmaFW111 = 1;
4552
4553                 if (!instance->PlasmaFW111)
4554                         instance->requestorId =
4555                                 ctrl_info->iov.requestorId;
4556                 else {
4557                         iovPtr = (struct IOV_111 *)((unsigned char *)ctrl_info + IOV_111_OFFSET);
4558                         instance->requestorId = iovPtr->requestorId;
4559                 }
4560                 dev_warn(&instance->pdev->dev, "I am VF "
4561                        "requestorId %d\n", instance->requestorId);
4562         }
4563
4564         le32_to_cpus((u32 *)&ctrl_info->adapterOperations3);
4565         instance->crash_dump_fw_support =
4566                 ctrl_info->adapterOperations3.supportCrashDump;
4567         instance->crash_dump_drv_support =
4568                 (instance->crash_dump_fw_support &&
4569                 instance->crash_dump_buf);
4570         if (instance->crash_dump_drv_support) {
4571                 dev_info(&instance->pdev->dev, "Firmware Crash dump "
4572                         "feature is supported\n");
4573                 megasas_set_crash_dump_params(instance,
4574                         MR_CRASH_BUF_TURN_OFF);
4575
4576         } else {
4577                 if (instance->crash_dump_buf)
4578                         pci_free_consistent(instance->pdev,
4579                                 CRASH_DMA_BUF_SIZE,
4580                                 instance->crash_dump_buf,
4581                                 instance->crash_dump_h);
4582                 instance->crash_dump_buf = NULL;
4583         }
4584         instance->max_sectors_per_req = instance->max_num_sge *
4585                                                 PAGE_SIZE / 512;
4586         if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
4587                 instance->max_sectors_per_req = tmp_sectors;
4588
4589         kfree(ctrl_info);
4590
4591         /* Check for valid throttlequeuedepth module parameter */
4592         if (instance->is_imr) {
4593                 if (throttlequeuedepth > (instance->max_fw_cmds -
4594                                           MEGASAS_SKINNY_INT_CMDS))
4595                         instance->throttlequeuedepth =
4596                                 MEGASAS_THROTTLE_QUEUE_DEPTH;
4597                 else
4598                         instance->throttlequeuedepth = throttlequeuedepth;
4599         } else {
4600                 if (throttlequeuedepth > (instance->max_fw_cmds -
4601                                           MEGASAS_INT_CMDS))
4602                         instance->throttlequeuedepth =
4603                                 MEGASAS_THROTTLE_QUEUE_DEPTH;
4604                 else
4605                         instance->throttlequeuedepth = throttlequeuedepth;
4606         }
4607
4608         /*
4609         * Setup tasklet for cmd completion
4610         */
4611
4612         tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
4613                 (unsigned long)instance);
4614
4615         /* Launch SR-IOV heartbeat timer */
4616         if (instance->requestorId) {
4617                 if (!megasas_sriov_start_heartbeat(instance, 1))
4618                         megasas_start_timer(instance,
4619                                             &instance->sriov_heartbeat_timer,
4620                                             megasas_sriov_heartbeat_handler,
4621                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
4622                 else
4623                         instance->skip_heartbeat_timer_del = 1;
4624         }
4625
4626         return 0;
4627
4628 fail_init_adapter:
4629 fail_ready_state:
4630         kfree(instance->ctrl_info);
4631         instance->ctrl_info = NULL;
4632         iounmap(instance->reg_set);
4633
4634       fail_ioremap:
4635         pci_release_selected_regions(instance->pdev, instance->bar);
4636
4637         return -EINVAL;
4638 }
4639
4640 /**
4641  * megasas_release_mfi -        Reverses the FW initialization
4642  * @intance:                    Adapter soft state
4643  */
4644 static void megasas_release_mfi(struct megasas_instance *instance)
4645 {
4646         u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);
4647
4648         if (instance->reply_queue)
4649                 pci_free_consistent(instance->pdev, reply_q_sz,
4650                             instance->reply_queue, instance->reply_queue_h);
4651
4652         megasas_free_cmds(instance);
4653
4654         iounmap(instance->reg_set);
4655
4656         pci_release_selected_regions(instance->pdev, instance->bar);
4657 }
4658
4659 /**
4660  * megasas_get_seq_num -        Gets latest event sequence numbers
4661  * @instance:                   Adapter soft state
4662  * @eli:                        FW event log sequence numbers information
4663  *
4664  * FW maintains a log of all events in a non-volatile area. Upper layers would
4665  * usually find out the latest sequence number of the events, the seq number at
4666  * the boot etc. They would "read" all the events below the latest seq number
4667  * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
4668  * number), they would subsribe to AEN (asynchronous event notification) and
4669  * wait for the events to happen.
4670  */
4671 static int
4672 megasas_get_seq_num(struct megasas_instance *instance,
4673                     struct megasas_evt_log_info *eli)
4674 {
4675         struct megasas_cmd *cmd;
4676         struct megasas_dcmd_frame *dcmd;
4677         struct megasas_evt_log_info *el_info;
4678         dma_addr_t el_info_h = 0;
4679
4680         cmd = megasas_get_cmd(instance);
4681
4682         if (!cmd) {
4683                 return -ENOMEM;
4684         }
4685
4686         dcmd = &cmd->frame->dcmd;
4687         el_info = pci_alloc_consistent(instance->pdev,
4688                                        sizeof(struct megasas_evt_log_info),
4689                                        &el_info_h);
4690
4691         if (!el_info) {
4692                 megasas_return_cmd(instance, cmd);
4693                 return -ENOMEM;
4694         }
4695
4696         memset(el_info, 0, sizeof(*el_info));
4697         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4698
4699         dcmd->cmd = MFI_CMD_DCMD;
4700         dcmd->cmd_status = 0x0;
4701         dcmd->sge_count = 1;
4702         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4703         dcmd->timeout = 0;
4704         dcmd->pad_0 = 0;
4705         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_log_info));
4706         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_GET_INFO);
4707         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(el_info_h);
4708         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_evt_log_info));
4709
4710         if (megasas_issue_blocked_cmd(instance, cmd, 30))
4711                 dev_err(&instance->pdev->dev, "Command timedout"
4712                         "from %s\n", __func__);
4713         else {
4714                 /*
4715                  * Copy the data back into callers buffer
4716                  */
4717                 eli->newest_seq_num = le32_to_cpu(el_info->newest_seq_num);
4718                 eli->oldest_seq_num = le32_to_cpu(el_info->oldest_seq_num);
4719                 eli->clear_seq_num = le32_to_cpu(el_info->clear_seq_num);
4720                 eli->shutdown_seq_num = le32_to_cpu(el_info->shutdown_seq_num);
4721                 eli->boot_seq_num = le32_to_cpu(el_info->boot_seq_num);
4722         }
4723
4724         pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
4725                             el_info, el_info_h);
4726
4727         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
4728                 megasas_return_mfi_mpt_pthr(instance, cmd,
4729                         cmd->mpt_pthr_cmd_blocked);
4730         else
4731                 megasas_return_cmd(instance, cmd);
4732
4733         return 0;
4734 }
4735
4736 /**
4737  * megasas_register_aen -       Registers for asynchronous event notification
4738  * @instance:                   Adapter soft state
4739  * @seq_num:                    The starting sequence number
4740  * @class_locale:               Class of the event
4741  *
4742  * This function subscribes for AEN for events beyond the @seq_num. It requests
4743  * to be notified if and only if the event is of type @class_locale
4744  */
4745 static int
4746 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
4747                      u32 class_locale_word)
4748 {
4749         int ret_val;
4750         struct megasas_cmd *cmd;
4751         struct megasas_dcmd_frame *dcmd;
4752         union megasas_evt_class_locale curr_aen;
4753         union megasas_evt_class_locale prev_aen;
4754
4755         /*
4756          * If there an AEN pending already (aen_cmd), check if the
4757          * class_locale of that pending AEN is inclusive of the new
4758          * AEN request we currently have. If it is, then we don't have
4759          * to do anything. In other words, whichever events the current
4760          * AEN request is subscribing to, have already been subscribed
4761          * to.
4762          *
4763          * If the old_cmd is _not_ inclusive, then we have to abort
4764          * that command, form a class_locale that is superset of both
4765          * old and current and re-issue to the FW
4766          */
4767
4768         curr_aen.word = class_locale_word;
4769
4770         if (instance->aen_cmd) {
4771
4772                 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
4773                 prev_aen.members.locale = le16_to_cpu(prev_aen.members.locale);
4774
4775                 /*
4776                  * A class whose enum value is smaller is inclusive of all
4777                  * higher values. If a PROGRESS (= -1) was previously
4778                  * registered, then a new registration requests for higher
4779                  * classes need not be sent to FW. They are automatically
4780                  * included.
4781                  *
4782                  * Locale numbers don't have such hierarchy. They are bitmap
4783                  * values
4784                  */
4785                 if ((prev_aen.members.class <= curr_aen.members.class) &&
4786                     !((prev_aen.members.locale & curr_aen.members.locale) ^
4787                       curr_aen.members.locale)) {
4788                         /*
4789                          * Previously issued event registration includes
4790                          * current request. Nothing to do.
4791                          */
4792                         return 0;
4793                 } else {
4794                         curr_aen.members.locale |= prev_aen.members.locale;
4795
4796                         if (prev_aen.members.class < curr_aen.members.class)
4797                                 curr_aen.members.class = prev_aen.members.class;
4798
4799                         instance->aen_cmd->abort_aen = 1;
4800                         ret_val = megasas_issue_blocked_abort_cmd(instance,
4801                                                                   instance->
4802                                                                   aen_cmd, 30);
4803
4804                         if (ret_val) {
4805                                 printk(KERN_DEBUG "megasas: Failed to abort "
4806                                        "previous AEN command\n");
4807                                 return ret_val;
4808                         }
4809                 }
4810         }
4811
4812         cmd = megasas_get_cmd(instance);
4813
4814         if (!cmd)
4815                 return -ENOMEM;
4816
4817         dcmd = &cmd->frame->dcmd;
4818
4819         memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
4820
4821         /*
4822          * Prepare DCMD for aen registration
4823          */
4824         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
4825
4826         dcmd->cmd = MFI_CMD_DCMD;
4827         dcmd->cmd_status = 0x0;
4828         dcmd->sge_count = 1;
4829         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
4830         dcmd->timeout = 0;
4831         dcmd->pad_0 = 0;
4832         dcmd->data_xfer_len = cpu_to_le32(sizeof(struct megasas_evt_detail));
4833         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_EVENT_WAIT);
4834         dcmd->mbox.w[0] = cpu_to_le32(seq_num);
4835         instance->last_seq_num = seq_num;
4836         dcmd->mbox.w[1] = cpu_to_le32(curr_aen.word);
4837         dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(instance->evt_detail_h);
4838         dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_evt_detail));
4839
4840         if (instance->aen_cmd != NULL) {
4841                 megasas_return_cmd(instance, cmd);
4842                 return 0;
4843         }
4844
4845         /*
4846          * Store reference to the cmd used to register for AEN. When an
4847          * application wants us to register for AEN, we have to abort this
4848          * cmd and re-register with a new EVENT LOCALE supplied by that app
4849          */
4850         instance->aen_cmd = cmd;
4851
4852         /*
4853          * Issue the aen registration frame
4854          */
4855         instance->instancet->issue_dcmd(instance, cmd);
4856
4857         return 0;
4858 }
4859
4860 /**
4861  * megasas_start_aen -  Subscribes to AEN during driver load time
4862  * @instance:           Adapter soft state
4863  */
4864 static int megasas_start_aen(struct megasas_instance *instance)
4865 {
4866         struct megasas_evt_log_info eli;
4867         union megasas_evt_class_locale class_locale;
4868
4869         /*
4870          * Get the latest sequence number from FW
4871          */
4872         memset(&eli, 0, sizeof(eli));
4873
4874         if (megasas_get_seq_num(instance, &eli))
4875                 return -1;
4876
4877         /*
4878          * Register AEN with FW for latest sequence number plus 1
4879          */
4880         class_locale.members.reserved = 0;
4881         class_locale.members.locale = MR_EVT_LOCALE_ALL;
4882         class_locale.members.class = MR_EVT_CLASS_DEBUG;
4883
4884         return megasas_register_aen(instance,
4885                         eli.newest_seq_num + 1,
4886                         class_locale.word);
4887 }
4888
4889 /**
4890  * megasas_io_attach -  Attaches this driver to SCSI mid-layer
4891  * @instance:           Adapter soft state
4892  */
4893 static int megasas_io_attach(struct megasas_instance *instance)
4894 {
4895         struct Scsi_Host *host = instance->host;
4896
4897         /*
4898          * Export parameters required by SCSI mid-layer
4899          */
4900         host->irq = instance->pdev->irq;
4901         host->unique_id = instance->unique_id;
4902         if (instance->is_imr) {
4903                 host->can_queue =
4904                         instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
4905         } else
4906                 host->can_queue =
4907                         instance->max_fw_cmds - MEGASAS_INT_CMDS;
4908         host->this_id = instance->init_id;
4909         host->sg_tablesize = instance->max_num_sge;
4910
4911         if (instance->fw_support_ieee)
4912                 instance->max_sectors_per_req = MEGASAS_MAX_SECTORS_IEEE;
4913
4914         /*
4915          * Check if the module parameter value for max_sectors can be used
4916          */
4917         if (max_sectors && max_sectors < instance->max_sectors_per_req)
4918                 instance->max_sectors_per_req = max_sectors;
4919         else {
4920                 if (max_sectors) {
4921                         if (((instance->pdev->device ==
4922                                 PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
4923                                 (instance->pdev->device ==
4924                                 PCI_DEVICE_ID_LSI_SAS0079GEN2)) &&
4925                                 (max_sectors <= MEGASAS_MAX_SECTORS)) {
4926                                 instance->max_sectors_per_req = max_sectors;
4927                         } else {
4928                         printk(KERN_INFO "megasas: max_sectors should be > 0"
4929                                 "and <= %d (or < 1MB for GEN2 controller)\n",
4930                                 instance->max_sectors_per_req);
4931                         }
4932                 }
4933         }
4934
4935         host->max_sectors = instance->max_sectors_per_req;
4936         host->cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
4937         host->max_channel = MEGASAS_MAX_CHANNELS - 1;
4938         host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
4939         host->max_lun = MEGASAS_MAX_LUN;
4940         host->max_cmd_len = 16;
4941
4942         /* Fusion only supports host reset */
4943         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
4944             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
4945             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
4946             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
4947                 host->hostt->eh_device_reset_handler = NULL;
4948                 host->hostt->eh_bus_reset_handler = NULL;
4949         }
4950
4951         /*
4952          * Notify the mid-layer about the new controller
4953          */
4954         if (scsi_add_host(host, &instance->pdev->dev)) {
4955                 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
4956                 return -ENODEV;
4957         }
4958
4959         /*
4960          * Trigger SCSI to scan our drives
4961          */
4962         scsi_scan_host(host);
4963         return 0;
4964 }
4965
4966 static int
4967 megasas_set_dma_mask(struct pci_dev *pdev)
4968 {
4969         /*
4970          * All our contollers are capable of performing 64-bit DMA
4971          */
4972         if (IS_DMA64) {
4973                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
4974
4975                         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
4976                                 goto fail_set_dma_mask;
4977                 }
4978         } else {
4979                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
4980                         goto fail_set_dma_mask;
4981         }
4982         /*
4983          * Ensure that all data structures are allocated in 32-bit
4984          * memory.
4985          */
4986         if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
4987                 /* Try 32bit DMA mask and 32 bit Consistent dma mask */
4988                 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
4989                         && !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
4990                         dev_info(&pdev->dev, "set 32bit DMA mask"
4991                                 "and 32 bit consistent mask\n");
4992                 else
4993                         goto fail_set_dma_mask;
4994         }
4995
4996         return 0;
4997
4998 fail_set_dma_mask:
4999         return 1;
5000 }
5001
5002 /**
5003  * megasas_probe_one -  PCI hotplug entry point
5004  * @pdev:               PCI device structure
5005  * @id:                 PCI ids of supported hotplugged adapter
5006  */
5007 static int megasas_probe_one(struct pci_dev *pdev,
5008                              const struct pci_device_id *id)
5009 {
5010         int rval, pos, i, j, cpu;
5011         struct Scsi_Host *host;
5012         struct megasas_instance *instance;
5013         u16 control = 0;
5014         struct fusion_context *fusion = NULL;
5015
5016         /* Reset MSI-X in the kdump kernel */
5017         if (reset_devices) {
5018                 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
5019                 if (pos) {
5020                         pci_read_config_word(pdev, pos + PCI_MSIX_FLAGS,
5021                                              &control);
5022                         if (control & PCI_MSIX_FLAGS_ENABLE) {
5023                                 dev_info(&pdev->dev, "resetting MSI-X\n");
5024                                 pci_write_config_word(pdev,
5025                                                       pos + PCI_MSIX_FLAGS,
5026                                                       control &
5027                                                       ~PCI_MSIX_FLAGS_ENABLE);
5028                         }
5029                 }
5030         }
5031
5032         /*
5033          * Announce PCI information
5034          */
5035         printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
5036                pdev->vendor, pdev->device, pdev->subsystem_vendor,
5037                pdev->subsystem_device);
5038
5039         printk("bus %d:slot %d:func %d\n",
5040                pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
5041
5042         /*
5043          * PCI prepping: enable device set bus mastering and dma mask
5044          */
5045         rval = pci_enable_device_mem(pdev);
5046
5047         if (rval) {
5048                 return rval;
5049         }
5050
5051         pci_set_master(pdev);
5052
5053         if (megasas_set_dma_mask(pdev))
5054                 goto fail_set_dma_mask;
5055
5056         host = scsi_host_alloc(&megasas_template,
5057                                sizeof(struct megasas_instance));
5058
5059         if (!host) {
5060                 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
5061                 goto fail_alloc_instance;
5062         }
5063
5064         instance = (struct megasas_instance *)host->hostdata;
5065         memset(instance, 0, sizeof(*instance));
5066         atomic_set( &instance->fw_reset_no_pci_access, 0 );
5067         instance->pdev = pdev;
5068
5069         switch (instance->pdev->device) {
5070         case PCI_DEVICE_ID_LSI_FUSION:
5071         case PCI_DEVICE_ID_LSI_PLASMA:
5072         case PCI_DEVICE_ID_LSI_INVADER:
5073         case PCI_DEVICE_ID_LSI_FURY:
5074         {
5075                 instance->ctrl_context_pages =
5076                         get_order(sizeof(struct fusion_context));
5077                 instance->ctrl_context = (void *)__get_free_pages(GFP_KERNEL,
5078                                 instance->ctrl_context_pages);
5079                 if (!instance->ctrl_context) {
5080                         printk(KERN_DEBUG "megasas: Failed to allocate "
5081                                "memory for Fusion context info\n");
5082                         goto fail_alloc_dma_buf;
5083                 }
5084                 fusion = instance->ctrl_context;
5085                 INIT_LIST_HEAD(&fusion->cmd_pool);
5086                 spin_lock_init(&fusion->mpt_pool_lock);
5087                 memset(fusion->load_balance_info, 0,
5088                         sizeof(struct LD_LOAD_BALANCE_INFO) * MAX_LOGICAL_DRIVES_EXT);
5089         }
5090         break;
5091         default: /* For all other supported controllers */
5092
5093                 instance->producer =
5094                         pci_alloc_consistent(pdev, sizeof(u32),
5095                                              &instance->producer_h);
5096                 instance->consumer =
5097                         pci_alloc_consistent(pdev, sizeof(u32),
5098                                              &instance->consumer_h);
5099
5100                 if (!instance->producer || !instance->consumer) {
5101                         printk(KERN_DEBUG "megasas: Failed to allocate"
5102                                "memory for producer, consumer\n");
5103                         goto fail_alloc_dma_buf;
5104                 }
5105
5106                 *instance->producer = 0;
5107                 *instance->consumer = 0;
5108                 break;
5109         }
5110
5111         /* Crash dump feature related initialisation*/
5112         instance->drv_buf_index = 0;
5113         instance->drv_buf_alloc = 0;
5114         instance->crash_dump_fw_support = 0;
5115         instance->crash_dump_app_support = 0;
5116         instance->fw_crash_state = UNAVAILABLE;
5117         spin_lock_init(&instance->crashdump_lock);
5118         instance->crash_dump_buf = NULL;
5119
5120         if (!reset_devices)
5121                 instance->crash_dump_buf = pci_alloc_consistent(pdev,
5122                                                 CRASH_DMA_BUF_SIZE,
5123                                                 &instance->crash_dump_h);
5124         if (!instance->crash_dump_buf)
5125                 dev_err(&instance->pdev->dev, "Can't allocate Firmware "
5126                         "crash dump DMA buffer\n");
5127
5128         megasas_poll_wait_aen = 0;
5129         instance->flag_ieee = 0;
5130         instance->ev = NULL;
5131         instance->issuepend_done = 1;
5132         instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
5133         instance->is_imr = 0;
5134
5135         instance->evt_detail = pci_alloc_consistent(pdev,
5136                                                     sizeof(struct
5137                                                            megasas_evt_detail),
5138                                                     &instance->evt_detail_h);
5139
5140         if (!instance->evt_detail) {
5141                 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
5142                        "event detail structure\n");
5143                 goto fail_alloc_dma_buf;
5144         }
5145
5146         /*
5147          * Initialize locks and queues
5148          */
5149         INIT_LIST_HEAD(&instance->cmd_pool);
5150         INIT_LIST_HEAD(&instance->internal_reset_pending_q);
5151
5152         atomic_set(&instance->fw_outstanding,0);
5153
5154         init_waitqueue_head(&instance->int_cmd_wait_q);
5155         init_waitqueue_head(&instance->abort_cmd_wait_q);
5156
5157         spin_lock_init(&instance->mfi_pool_lock);
5158         spin_lock_init(&instance->hba_lock);
5159         spin_lock_init(&instance->completion_lock);
5160
5161         mutex_init(&instance->aen_mutex);
5162         mutex_init(&instance->reset_mutex);
5163
5164         /*
5165          * Initialize PCI related and misc parameters
5166          */
5167         instance->host = host;
5168         instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
5169         instance->init_id = MEGASAS_DEFAULT_INIT_ID;
5170         instance->ctrl_info = NULL;
5171
5172         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
5173                 (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
5174                 instance->flag_ieee = 1;
5175                 sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
5176         } else
5177                 sema_init(&instance->ioctl_sem, (MEGASAS_INT_CMDS - 5));
5178
5179         megasas_dbg_lvl = 0;
5180         instance->flag = 0;
5181         instance->unload = 1;
5182         instance->last_time = 0;
5183         instance->disableOnlineCtrlReset = 1;
5184         instance->UnevenSpanSupport = 0;
5185
5186         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
5187             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
5188             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
5189             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
5190                 INIT_WORK(&instance->work_init, megasas_fusion_ocr_wq);
5191                 INIT_WORK(&instance->crash_init, megasas_fusion_crash_dump_wq);
5192         } else
5193                 INIT_WORK(&instance->work_init, process_fw_state_change_wq);
5194
5195         /*
5196          * Initialize MFI Firmware
5197          */
5198         if (megasas_init_fw(instance))
5199                 goto fail_init_mfi;
5200
5201         if (instance->requestorId) {
5202                 if (instance->PlasmaFW111) {
5203                         instance->vf_affiliation_111 =
5204                                 pci_alloc_consistent(pdev, sizeof(struct MR_LD_VF_AFFILIATION_111),
5205                                                      &instance->vf_affiliation_111_h);
5206                         if (!instance->vf_affiliation_111)
5207                                 printk(KERN_WARNING "megasas: Can't allocate "
5208                                        "memory for VF affiliation buffer\n");
5209                 } else {
5210                         instance->vf_affiliation =
5211                                 pci_alloc_consistent(pdev,
5212                                                      (MAX_LOGICAL_DRIVES + 1) *
5213                                                      sizeof(struct MR_LD_VF_AFFILIATION),
5214                                                      &instance->vf_affiliation_h);
5215                         if (!instance->vf_affiliation)
5216                                 printk(KERN_WARNING "megasas: Can't allocate "
5217                                        "memory for VF affiliation buffer\n");
5218                 }
5219         }
5220
5221 retry_irq_register:
5222         /*
5223          * Register IRQ
5224          */
5225         if (instance->msix_vectors) {
5226                 cpu = cpumask_first(cpu_online_mask);
5227                 for (i = 0; i < instance->msix_vectors; i++) {
5228                         instance->irq_context[i].instance = instance;
5229                         instance->irq_context[i].MSIxIndex = i;
5230                         if (request_irq(instance->msixentry[i].vector,
5231                                         instance->instancet->service_isr, 0,
5232                                         "megasas",
5233                                         &instance->irq_context[i])) {
5234                                 printk(KERN_DEBUG "megasas: Failed to "
5235                                        "register IRQ for vector %d.\n", i);
5236                                 for (j = 0; j < i; j++) {
5237                                         if (smp_affinity_enable)
5238                                                 irq_set_affinity_hint(
5239                                                         instance->msixentry[j].vector, NULL);
5240                                         free_irq(
5241                                                 instance->msixentry[j].vector,
5242                                                 &instance->irq_context[j]);
5243                                 }
5244                                 /* Retry irq register for IO_APIC */
5245                                 instance->msix_vectors = 0;
5246                                 goto retry_irq_register;
5247                         }
5248                         if (smp_affinity_enable) {
5249                                 if (irq_set_affinity_hint(instance->msixentry[i].vector,
5250                                         get_cpu_mask(cpu)))
5251                                         dev_err(&instance->pdev->dev,
5252                                                 "Error setting affinity hint "
5253                                                 "for cpu %d\n", cpu);
5254                                 cpu = cpumask_next(cpu, cpu_online_mask);
5255                         }
5256                 }
5257         } else {
5258                 instance->irq_context[0].instance = instance;
5259                 instance->irq_context[0].MSIxIndex = 0;
5260                 if (request_irq(pdev->irq, instance->instancet->service_isr,
5261                                 IRQF_SHARED, "megasas",
5262                                 &instance->irq_context[0])) {
5263                         printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
5264                         goto fail_irq;
5265                 }
5266         }
5267
5268         instance->instancet->enable_intr(instance);
5269
5270         /*
5271          * Store instance in PCI softstate
5272          */
5273         pci_set_drvdata(pdev, instance);
5274
5275         /*
5276          * Add this controller to megasas_mgmt_info structure so that it
5277          * can be exported to management applications
5278          */
5279         megasas_mgmt_info.count++;
5280         megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
5281         megasas_mgmt_info.max_index++;
5282
5283         /*
5284          * Register with SCSI mid-layer
5285          */
5286         if (megasas_io_attach(instance))
5287                 goto fail_io_attach;
5288
5289         instance->unload = 0;
5290
5291         /*
5292          * Initiate AEN (Asynchronous Event Notification)
5293          */
5294         if (megasas_start_aen(instance)) {
5295                 printk(KERN_DEBUG "megasas: start aen failed\n");
5296                 goto fail_start_aen;
5297         }
5298
5299         /* Get current SR-IOV LD/VF affiliation */
5300         if (instance->requestorId)
5301                 megasas_get_ld_vf_affiliation(instance, 1);
5302
5303         return 0;
5304
5305       fail_start_aen:
5306       fail_io_attach:
5307         megasas_mgmt_info.count--;
5308         megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
5309         megasas_mgmt_info.max_index--;
5310
5311         instance->instancet->disable_intr(instance);
5312         if (instance->msix_vectors)
5313                 for (i = 0; i < instance->msix_vectors; i++) {
5314                         if (smp_affinity_enable)
5315                                 irq_set_affinity_hint(
5316                                         instance->msixentry[i].vector, NULL);
5317                         free_irq(instance->msixentry[i].vector,
5318                                  &instance->irq_context[i]);
5319                 }
5320         else
5321                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5322 fail_irq:
5323         if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
5324             (instance->pdev->device == PCI_DEVICE_ID_LSI_PLASMA) ||
5325             (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
5326             (instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
5327                 megasas_release_fusion(instance);
5328         else
5329                 megasas_release_mfi(instance);
5330       fail_init_mfi:
5331         if (instance->msix_vectors)
5332                 pci_disable_msix(instance->pdev);
5333       fail_alloc_dma_buf:
5334         if (instance->evt_detail)
5335                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5336                                     instance->evt_detail,
5337                                     instance->evt_detail_h);
5338
5339         if (instance->producer)
5340                 pci_free_consistent(pdev, sizeof(u32), instance->producer,
5341                                     instance->producer_h);
5342         if (instance->consumer)
5343                 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
5344                                     instance->consumer_h);
5345         scsi_host_put(host);
5346
5347       fail_alloc_instance:
5348       fail_set_dma_mask:
5349         pci_disable_device(pdev);
5350
5351         return -ENODEV;
5352 }
5353
5354 /**
5355  * megasas_flush_cache -        Requests FW to flush all its caches
5356  * @instance:                   Adapter soft state
5357  */
5358 static void megasas_flush_cache(struct megasas_instance *instance)
5359 {
5360         struct megasas_cmd *cmd;
5361         struct megasas_dcmd_frame *dcmd;
5362
5363         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
5364                 return;
5365
5366         cmd = megasas_get_cmd(instance);
5367
5368         if (!cmd)
5369                 return;
5370
5371         dcmd = &cmd->frame->dcmd;
5372
5373         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
5374
5375         dcmd->cmd = MFI_CMD_DCMD;
5376         dcmd->cmd_status = 0x0;
5377         dcmd->sge_count = 0;
5378         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
5379         dcmd->timeout = 0;
5380         dcmd->pad_0 = 0;
5381         dcmd->data_xfer_len = 0;
5382         dcmd->opcode = cpu_to_le32(MR_DCMD_CTRL_CACHE_FLUSH);
5383         dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
5384
5385         if (megasas_issue_blocked_cmd(instance, cmd, 30))
5386                 dev_err(&instance->pdev->dev, "Command timedout"
5387                         " from %s\n", __func__);
5388
5389         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
5390                 megasas_return_mfi_mpt_pthr(instance, cmd,
5391                         cmd->mpt_pthr_cmd_blocked);
5392         else
5393                 megasas_return_cmd(instance, cmd);
5394
5395         return;
5396 }
5397
5398 /**
5399  * megasas_shutdown_controller -        Instructs FW to shutdown the controller
5400  * @instance:                           Adapter soft state
5401  * @opcode:                             Shutdown/Hibernate
5402  */
5403 static void megasas_shutdown_controller(struct megasas_instance *instance,
5404                                         u32 opcode)
5405 {
5406         struct megasas_cmd *cmd;
5407         struct megasas_dcmd_frame *dcmd;
5408
5409         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
5410                 return;
5411
5412         cmd = megasas_get_cmd(instance);
5413
5414         if (!cmd)
5415                 return;
5416
5417         if (instance->aen_cmd)
5418                 megasas_issue_blocked_abort_cmd(instance,
5419                         instance->aen_cmd, 30);
5420         if (instance->map_update_cmd)
5421                 megasas_issue_blocked_abort_cmd(instance,
5422                         instance->map_update_cmd, 30);
5423         dcmd = &cmd->frame->dcmd;
5424
5425         memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
5426
5427         dcmd->cmd = MFI_CMD_DCMD;
5428         dcmd->cmd_status = 0x0;
5429         dcmd->sge_count = 0;
5430         dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_NONE);
5431         dcmd->timeout = 0;
5432         dcmd->pad_0 = 0;
5433         dcmd->data_xfer_len = 0;
5434         dcmd->opcode = cpu_to_le32(opcode);
5435
5436         if (megasas_issue_blocked_cmd(instance, cmd, 30))
5437                 dev_err(&instance->pdev->dev, "Command timedout"
5438                         "from %s\n", __func__);
5439
5440         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
5441                 megasas_return_mfi_mpt_pthr(instance, cmd,
5442                         cmd->mpt_pthr_cmd_blocked);
5443         else
5444                 megasas_return_cmd(instance, cmd);
5445
5446         return;
5447 }
5448
5449 #ifdef CONFIG_PM
5450 /**
5451  * megasas_suspend -    driver suspend entry point
5452  * @pdev:               PCI device structure
5453  * @state:              PCI power state to suspend routine
5454  */
5455 static int
5456 megasas_suspend(struct pci_dev *pdev, pm_message_t state)
5457 {
5458         struct Scsi_Host *host;
5459         struct megasas_instance *instance;
5460         int i;
5461
5462         instance = pci_get_drvdata(pdev);
5463         host = instance->host;
5464         instance->unload = 1;
5465
5466         /* Shutdown SR-IOV heartbeat timer */
5467         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
5468                 del_timer_sync(&instance->sriov_heartbeat_timer);
5469
5470         megasas_flush_cache(instance);
5471         megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
5472
5473         /* cancel the delayed work if this work still in queue */
5474         if (instance->ev != NULL) {
5475                 struct megasas_aen_event *ev = instance->ev;
5476                 cancel_delayed_work_sync(&ev->hotplug_work);
5477                 instance->ev = NULL;
5478         }
5479
5480         tasklet_kill(&instance->isr_tasklet);
5481
5482         pci_set_drvdata(instance->pdev, instance);
5483         instance->instancet->disable_intr(instance);
5484
5485         if (instance->msix_vectors)
5486                 for (i = 0; i < instance->msix_vectors; i++) {
5487                         if (smp_affinity_enable)
5488                                 irq_set_affinity_hint(
5489                                         instance->msixentry[i].vector, NULL);
5490                         free_irq(instance->msixentry[i].vector,
5491                                  &instance->irq_context[i]);
5492                 }
5493         else
5494                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5495         if (instance->msix_vectors)
5496                 pci_disable_msix(instance->pdev);
5497
5498         pci_save_state(pdev);
5499         pci_disable_device(pdev);
5500
5501         pci_set_power_state(pdev, pci_choose_state(pdev, state));
5502
5503         return 0;
5504 }
5505
5506 /**
5507  * megasas_resume-      driver resume entry point
5508  * @pdev:               PCI device structure
5509  */
5510 static int
5511 megasas_resume(struct pci_dev *pdev)
5512 {
5513         int rval, i, j, cpu;
5514         struct Scsi_Host *host;
5515         struct megasas_instance *instance;
5516
5517         instance = pci_get_drvdata(pdev);
5518         host = instance->host;
5519         pci_set_power_state(pdev, PCI_D0);
5520         pci_enable_wake(pdev, PCI_D0, 0);
5521         pci_restore_state(pdev);
5522
5523         /*
5524          * PCI prepping: enable device set bus mastering and dma mask
5525          */
5526         rval = pci_enable_device_mem(pdev);
5527
5528         if (rval) {
5529                 printk(KERN_ERR "megasas: Enable device failed\n");
5530                 return rval;
5531         }
5532
5533         pci_set_master(pdev);
5534
5535         if (megasas_set_dma_mask(pdev))
5536                 goto fail_set_dma_mask;
5537
5538         /*
5539          * Initialize MFI Firmware
5540          */
5541
5542         atomic_set(&instance->fw_outstanding, 0);
5543
5544         /*
5545          * We expect the FW state to be READY
5546          */
5547         if (megasas_transition_to_ready(instance, 0))
5548                 goto fail_ready_state;
5549
5550         /* Now re-enable MSI-X */
5551         if (instance->msix_vectors &&
5552             pci_enable_msix_exact(instance->pdev, instance->msixentry,
5553                                   instance->msix_vectors))
5554                 goto fail_reenable_msix;
5555
5556         switch (instance->pdev->device) {
5557         case PCI_DEVICE_ID_LSI_FUSION:
5558         case PCI_DEVICE_ID_LSI_PLASMA:
5559         case PCI_DEVICE_ID_LSI_INVADER:
5560         case PCI_DEVICE_ID_LSI_FURY:
5561         {
5562                 megasas_reset_reply_desc(instance);
5563                 if (megasas_ioc_init_fusion(instance)) {
5564                         megasas_free_cmds(instance);
5565                         megasas_free_cmds_fusion(instance);
5566                         goto fail_init_mfi;
5567                 }
5568                 if (!megasas_get_map_info(instance))
5569                         megasas_sync_map_info(instance);
5570         }
5571         break;
5572         default:
5573                 *instance->producer = 0;
5574                 *instance->consumer = 0;
5575                 if (megasas_issue_init_mfi(instance))
5576                         goto fail_init_mfi;
5577                 break;
5578         }
5579
5580         tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
5581                      (unsigned long)instance);
5582
5583         /*
5584          * Register IRQ
5585          */
5586         if (instance->msix_vectors) {
5587                 cpu = cpumask_first(cpu_online_mask);
5588                 for (i = 0 ; i < instance->msix_vectors; i++) {
5589                         instance->irq_context[i].instance = instance;
5590                         instance->irq_context[i].MSIxIndex = i;
5591                         if (request_irq(instance->msixentry[i].vector,
5592                                         instance->instancet->service_isr, 0,
5593                                         "megasas",
5594                                         &instance->irq_context[i])) {
5595                                 printk(KERN_DEBUG "megasas: Failed to "
5596                                        "register IRQ for vector %d.\n", i);
5597                                 for (j = 0; j < i; j++) {
5598                                         if (smp_affinity_enable)
5599                                                 irq_set_affinity_hint(
5600                                                         instance->msixentry[j].vector, NULL);
5601                                         free_irq(
5602                                                 instance->msixentry[j].vector,
5603                                                 &instance->irq_context[j]);
5604                                 }
5605                                 goto fail_irq;
5606                         }
5607
5608                         if (smp_affinity_enable) {
5609                                 if (irq_set_affinity_hint(instance->msixentry[i].vector,
5610                                         get_cpu_mask(cpu)))
5611                                         dev_err(&instance->pdev->dev, "Error "
5612                                                 "setting affinity hint for cpu "
5613                                                 "%d\n", cpu);
5614                                 cpu = cpumask_next(cpu, cpu_online_mask);
5615                         }
5616                 }
5617         } else {
5618                 instance->irq_context[0].instance = instance;
5619                 instance->irq_context[0].MSIxIndex = 0;
5620                 if (request_irq(pdev->irq, instance->instancet->service_isr,
5621                                 IRQF_SHARED, "megasas",
5622                                 &instance->irq_context[0])) {
5623                         printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
5624                         goto fail_irq;
5625                 }
5626         }
5627
5628         /* Re-launch SR-IOV heartbeat timer */
5629         if (instance->requestorId) {
5630                 if (!megasas_sriov_start_heartbeat(instance, 0))
5631                         megasas_start_timer(instance,
5632                                             &instance->sriov_heartbeat_timer,
5633                                             megasas_sriov_heartbeat_handler,
5634                                             MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
5635                 else
5636                         instance->skip_heartbeat_timer_del = 1;
5637         }
5638
5639         instance->instancet->enable_intr(instance);
5640         instance->unload = 0;
5641
5642         /*
5643          * Initiate AEN (Asynchronous Event Notification)
5644          */
5645         if (megasas_start_aen(instance))
5646                 printk(KERN_ERR "megasas: Start AEN failed\n");
5647
5648         return 0;
5649
5650 fail_irq:
5651 fail_init_mfi:
5652         if (instance->evt_detail)
5653                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5654                                 instance->evt_detail,
5655                                 instance->evt_detail_h);
5656
5657         if (instance->producer)
5658                 pci_free_consistent(pdev, sizeof(u32), instance->producer,
5659                                 instance->producer_h);
5660         if (instance->consumer)
5661                 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
5662                                 instance->consumer_h);
5663         scsi_host_put(host);
5664
5665 fail_set_dma_mask:
5666 fail_ready_state:
5667 fail_reenable_msix:
5668
5669         pci_disable_device(pdev);
5670
5671         return -ENODEV;
5672 }
5673 #else
5674 #define megasas_suspend NULL
5675 #define megasas_resume  NULL
5676 #endif
5677
5678 /**
5679  * megasas_detach_one - PCI hot"un"plug entry point
5680  * @pdev:               PCI device structure
5681  */
5682 static void megasas_detach_one(struct pci_dev *pdev)
5683 {
5684         int i;
5685         struct Scsi_Host *host;
5686         struct megasas_instance *instance;
5687         struct fusion_context *fusion;
5688
5689         instance = pci_get_drvdata(pdev);
5690         instance->unload = 1;
5691         host = instance->host;
5692         fusion = instance->ctrl_context;
5693
5694         /* Shutdown SR-IOV heartbeat timer */
5695         if (instance->requestorId && !instance->skip_heartbeat_timer_del)
5696                 del_timer_sync(&instance->sriov_heartbeat_timer);
5697
5698         if (instance->fw_crash_state != UNAVAILABLE)
5699                 megasas_free_host_crash_buffer(instance);
5700         scsi_remove_host(instance->host);
5701         megasas_flush_cache(instance);
5702         megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
5703
5704         /* cancel the delayed work if this work still in queue*/
5705         if (instance->ev != NULL) {
5706                 struct megasas_aen_event *ev = instance->ev;
5707                 cancel_delayed_work_sync(&ev->hotplug_work);
5708                 instance->ev = NULL;
5709         }
5710
5711         /* cancel all wait events */
5712         wake_up_all(&instance->int_cmd_wait_q);
5713
5714         tasklet_kill(&instance->isr_tasklet);
5715
5716         /*
5717          * Take the instance off the instance array. Note that we will not
5718          * decrement the max_index. We let this array be sparse array
5719          */
5720         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5721                 if (megasas_mgmt_info.instance[i] == instance) {
5722                         megasas_mgmt_info.count--;
5723                         megasas_mgmt_info.instance[i] = NULL;
5724
5725                         break;
5726                 }
5727         }
5728
5729         instance->instancet->disable_intr(instance);
5730
5731         if (instance->msix_vectors)
5732                 for (i = 0; i < instance->msix_vectors; i++) {
5733                         if (smp_affinity_enable)
5734                                 irq_set_affinity_hint(
5735                                         instance->msixentry[i].vector, NULL);
5736                         free_irq(instance->msixentry[i].vector,
5737                                  &instance->irq_context[i]);
5738                 }
5739         else
5740                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5741         if (instance->msix_vectors)
5742                 pci_disable_msix(instance->pdev);
5743
5744         switch (instance->pdev->device) {
5745         case PCI_DEVICE_ID_LSI_FUSION:
5746         case PCI_DEVICE_ID_LSI_PLASMA:
5747         case PCI_DEVICE_ID_LSI_INVADER:
5748         case PCI_DEVICE_ID_LSI_FURY:
5749                 megasas_release_fusion(instance);
5750                 for (i = 0; i < 2 ; i++) {
5751                         if (fusion->ld_map[i])
5752                                 dma_free_coherent(&instance->pdev->dev,
5753                                                   fusion->max_map_sz,
5754                                                   fusion->ld_map[i],
5755                                                   fusion->ld_map_phys[i]);
5756                         if (fusion->ld_drv_map[i])
5757                                 free_pages((ulong)fusion->ld_drv_map[i],
5758                                         fusion->drv_map_pages);
5759                 }
5760                 free_pages((ulong)instance->ctrl_context,
5761                         instance->ctrl_context_pages);
5762                 break;
5763         default:
5764                 megasas_release_mfi(instance);
5765                 pci_free_consistent(pdev, sizeof(u32),
5766                                     instance->producer,
5767                                     instance->producer_h);
5768                 pci_free_consistent(pdev, sizeof(u32),
5769                                     instance->consumer,
5770                                     instance->consumer_h);
5771                 break;
5772         }
5773
5774         kfree(instance->ctrl_info);
5775
5776         if (instance->evt_detail)
5777                 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
5778                                 instance->evt_detail, instance->evt_detail_h);
5779
5780         if (instance->vf_affiliation)
5781                 pci_free_consistent(pdev, (MAX_LOGICAL_DRIVES + 1) *
5782                                     sizeof(struct MR_LD_VF_AFFILIATION),
5783                                     instance->vf_affiliation,
5784                                     instance->vf_affiliation_h);
5785
5786         if (instance->vf_affiliation_111)
5787                 pci_free_consistent(pdev,
5788                                     sizeof(struct MR_LD_VF_AFFILIATION_111),
5789                                     instance->vf_affiliation_111,
5790                                     instance->vf_affiliation_111_h);
5791
5792         if (instance->hb_host_mem)
5793                 pci_free_consistent(pdev, sizeof(struct MR_CTRL_HB_HOST_MEM),
5794                                     instance->hb_host_mem,
5795                                     instance->hb_host_mem_h);
5796
5797         if (instance->crash_dump_buf)
5798                 pci_free_consistent(pdev, CRASH_DMA_BUF_SIZE,
5799                             instance->crash_dump_buf, instance->crash_dump_h);
5800
5801         scsi_host_put(host);
5802
5803         pci_disable_device(pdev);
5804
5805         return;
5806 }
5807
5808 /**
5809  * megasas_shutdown -   Shutdown entry point
5810  * @device:             Generic device structure
5811  */
5812 static void megasas_shutdown(struct pci_dev *pdev)
5813 {
5814         int i;
5815         struct megasas_instance *instance = pci_get_drvdata(pdev);
5816
5817         instance->unload = 1;
5818         megasas_flush_cache(instance);
5819         megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
5820         instance->instancet->disable_intr(instance);
5821         if (instance->msix_vectors)
5822                 for (i = 0; i < instance->msix_vectors; i++) {
5823                         if (smp_affinity_enable)
5824                                 irq_set_affinity_hint(
5825                                         instance->msixentry[i].vector, NULL);
5826                         free_irq(instance->msixentry[i].vector,
5827                                  &instance->irq_context[i]);
5828                 }
5829         else
5830                 free_irq(instance->pdev->irq, &instance->irq_context[0]);
5831         if (instance->msix_vectors)
5832                 pci_disable_msix(instance->pdev);
5833 }
5834
5835 /**
5836  * megasas_mgmt_open -  char node "open" entry point
5837  */
5838 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
5839 {
5840         /*
5841          * Allow only those users with admin rights
5842          */
5843         if (!capable(CAP_SYS_ADMIN))
5844                 return -EACCES;
5845
5846         return 0;
5847 }
5848
5849 /**
5850  * megasas_mgmt_fasync -        Async notifier registration from applications
5851  *
5852  * This function adds the calling process to a driver global queue. When an
5853  * event occurs, SIGIO will be sent to all processes in this queue.
5854  */
5855 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
5856 {
5857         int rc;
5858
5859         mutex_lock(&megasas_async_queue_mutex);
5860
5861         rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
5862
5863         mutex_unlock(&megasas_async_queue_mutex);
5864
5865         if (rc >= 0) {
5866                 /* For sanity check when we get ioctl */
5867                 filep->private_data = filep;
5868                 return 0;
5869         }
5870
5871         printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
5872
5873         return rc;
5874 }
5875
5876 /**
5877  * megasas_mgmt_poll -  char node "poll" entry point
5878  * */
5879 static unsigned int megasas_mgmt_poll(struct file *file, poll_table *wait)
5880 {
5881         unsigned int mask;
5882         unsigned long flags;
5883         poll_wait(file, &megasas_poll_wait, wait);
5884         spin_lock_irqsave(&poll_aen_lock, flags);
5885         if (megasas_poll_wait_aen)
5886                 mask =   (POLLIN | POLLRDNORM);
5887
5888         else
5889                 mask = 0;
5890         megasas_poll_wait_aen = 0;
5891         spin_unlock_irqrestore(&poll_aen_lock, flags);
5892         return mask;
5893 }
5894
5895 /*
5896  * megasas_set_crash_dump_params_ioctl:
5897  *              Send CRASH_DUMP_MODE DCMD to all controllers
5898  * @cmd:        MFI command frame
5899  */
5900
5901 static int megasas_set_crash_dump_params_ioctl(
5902         struct megasas_cmd *cmd)
5903 {
5904         struct megasas_instance *local_instance;
5905         int i, error = 0;
5906         int crash_support;
5907
5908         crash_support = cmd->frame->dcmd.mbox.w[0];
5909
5910         for (i = 0; i < megasas_mgmt_info.max_index; i++) {
5911                 local_instance = megasas_mgmt_info.instance[i];
5912                 if (local_instance && local_instance->crash_dump_drv_support) {
5913                         if ((local_instance->adprecovery ==
5914                                 MEGASAS_HBA_OPERATIONAL) &&
5915                                 !megasas_set_crash_dump_params(local_instance,
5916                                         crash_support)) {
5917                                 local_instance->crash_dump_app_support =
5918                                         crash_support;
5919                                 dev_info(&local_instance->pdev->dev,
5920                                         "Application firmware crash "
5921                                         "dump mode set success\n");
5922                                 error = 0;
5923                         } else {
5924                                 dev_info(&local_instance->pdev->dev,
5925                                         "Application firmware crash "
5926                                         "dump mode set failed\n");
5927                                 error = -1;
5928                         }
5929                 }
5930         }
5931         return error;
5932 }
5933
5934 /**
5935  * megasas_mgmt_fw_ioctl -      Issues management ioctls to FW
5936  * @instance:                   Adapter soft state
5937  * @argp:                       User's ioctl packet
5938  */
5939 static int
5940 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
5941                       struct megasas_iocpacket __user * user_ioc,
5942                       struct megasas_iocpacket *ioc)
5943 {
5944         struct megasas_sge32 *kern_sge32;
5945         struct megasas_cmd *cmd;
5946         void *kbuff_arr[MAX_IOCTL_SGE];
5947         dma_addr_t buf_handle = 0;
5948         int error = 0, i;
5949         void *sense = NULL;
5950         dma_addr_t sense_handle;
5951         unsigned long *sense_ptr;
5952
5953         memset(kbuff_arr, 0, sizeof(kbuff_arr));
5954
5955         if (ioc->sge_count > MAX_IOCTL_SGE) {
5956                 printk(KERN_DEBUG "megasas: SGE count [%d] >  max limit [%d]\n",
5957                        ioc->sge_count, MAX_IOCTL_SGE);
5958                 return -EINVAL;
5959         }
5960
5961         cmd = megasas_get_cmd(instance);
5962         if (!cmd) {
5963                 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
5964                 return -ENOMEM;
5965         }
5966
5967         /*
5968          * User's IOCTL packet has 2 frames (maximum). Copy those two
5969          * frames into our cmd's frames. cmd->frame's context will get
5970          * overwritten when we copy from user's frames. So set that value
5971          * alone separately
5972          */
5973         memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
5974         cmd->frame->hdr.context = cpu_to_le32(cmd->index);
5975         cmd->frame->hdr.pad_0 = 0;
5976         cmd->frame->hdr.flags &= cpu_to_le16(~(MFI_FRAME_IEEE |
5977                                                MFI_FRAME_SGL64 |
5978                                                MFI_FRAME_SENSE64));
5979
5980         if (cmd->frame->dcmd.opcode == MR_DRIVER_SET_APP_CRASHDUMP_MODE) {
5981                 error = megasas_set_crash_dump_params_ioctl(cmd);
5982                 megasas_return_cmd(instance, cmd);
5983                 return error;
5984         }
5985
5986         /*
5987          * The management interface between applications and the fw uses
5988          * MFI frames. E.g, RAID configuration changes, LD property changes
5989          * etc are accomplishes through different kinds of MFI frames. The
5990          * driver needs to care only about substituting user buffers with
5991          * kernel buffers in SGLs. The location of SGL is embedded in the
5992          * struct iocpacket itself.
5993          */
5994         kern_sge32 = (struct megasas_sge32 *)
5995             ((unsigned long)cmd->frame + ioc->sgl_off);
5996
5997         /*
5998          * For each user buffer, create a mirror buffer and copy in
5999          */
6000         for (i = 0; i < ioc->sge_count; i++) {
6001                 if (!ioc->sgl[i].iov_len)
6002                         continue;
6003
6004                 kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
6005                                                     ioc->sgl[i].iov_len,
6006                                                     &buf_handle, GFP_KERNEL);
6007                 if (!kbuff_arr[i]) {
6008                         printk(KERN_DEBUG "megasas: Failed to alloc "
6009                                "kernel SGL buffer for IOCTL \n");
6010                         error = -ENOMEM;
6011                         goto out;
6012                 }
6013
6014                 /*
6015                  * We don't change the dma_coherent_mask, so
6016                  * pci_alloc_consistent only returns 32bit addresses
6017                  */
6018                 kern_sge32[i].phys_addr = cpu_to_le32(buf_handle);
6019                 kern_sge32[i].length = cpu_to_le32(ioc->sgl[i].iov_len);
6020
6021                 /*
6022                  * We created a kernel buffer corresponding to the
6023                  * user buffer. Now copy in from the user buffer
6024                  */
6025                 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
6026                                    (u32) (ioc->sgl[i].iov_len))) {
6027                         error = -EFAULT;
6028                         goto out;
6029                 }
6030         }
6031
6032         if (ioc->sense_len) {
6033                 sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
6034                                              &sense_handle, GFP_KERNEL);
6035                 if (!sense) {
6036                         error = -ENOMEM;
6037                         goto out;
6038                 }
6039
6040                 sense_ptr =
6041                 (unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
6042                 *sense_ptr = cpu_to_le32(sense_handle);
6043         }
6044
6045         /*
6046          * Set the sync_cmd flag so that the ISR knows not to complete this
6047          * cmd to the SCSI mid-layer
6048          */
6049         cmd->sync_cmd = 1;
6050         megasas_issue_blocked_cmd(instance, cmd, 0);
6051         cmd->sync_cmd = 0;
6052
6053         /*
6054          * copy out the kernel buffers to user buffers
6055          */
6056         for (i = 0; i < ioc->sge_count; i++) {
6057                 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
6058                                  ioc->sgl[i].iov_len)) {
6059                         error = -EFAULT;
6060                         goto out;
6061                 }
6062         }
6063
6064         /*
6065          * copy out the sense
6066          */
6067         if (ioc->sense_len) {
6068                 /*
6069                  * sense_ptr points to the location that has the user
6070                  * sense buffer address
6071                  */
6072                 sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
6073                                 ioc->sense_off);
6074
6075                 if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
6076                                  sense, ioc->sense_len)) {
6077                         printk(KERN_ERR "megasas: Failed to copy out to user "
6078                                         "sense data\n");
6079                         error = -EFAULT;
6080                         goto out;
6081                 }
6082         }
6083
6084         /*
6085          * copy the status codes returned by the fw
6086          */
6087         if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
6088                          &cmd->frame->hdr.cmd_status, sizeof(u8))) {
6089                 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
6090                 error = -EFAULT;
6091         }
6092
6093       out:
6094         if (sense) {
6095                 dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
6096                                     sense, sense_handle);
6097         }
6098
6099         for (i = 0; i < ioc->sge_count; i++) {
6100                 if (kbuff_arr[i])
6101                         dma_free_coherent(&instance->pdev->dev,
6102                                           le32_to_cpu(kern_sge32[i].length),
6103                                           kbuff_arr[i],
6104                                           le32_to_cpu(kern_sge32[i].phys_addr));
6105                         kbuff_arr[i] = NULL;
6106         }
6107
6108         if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
6109                 megasas_return_mfi_mpt_pthr(instance, cmd,
6110                         cmd->mpt_pthr_cmd_blocked);
6111         else
6112                 megasas_return_cmd(instance, cmd);
6113         return error;
6114 }
6115
6116 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
6117 {
6118         struct megasas_iocpacket __user *user_ioc =
6119             (struct megasas_iocpacket __user *)arg;
6120         struct megasas_iocpacket *ioc;
6121         struct megasas_instance *instance;
6122         int error;
6123         int i;
6124         unsigned long flags;
6125         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
6126
6127         ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
6128         if (!ioc)
6129                 return -ENOMEM;
6130
6131         if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
6132                 error = -EFAULT;
6133                 goto out_kfree_ioc;
6134         }
6135
6136         instance = megasas_lookup_instance(ioc->host_no);
6137         if (!instance) {
6138                 error = -ENODEV;
6139                 goto out_kfree_ioc;
6140         }
6141
6142         /* Adjust ioctl wait time for VF mode */
6143         if (instance->requestorId)
6144                 wait_time = MEGASAS_ROUTINE_WAIT_TIME_VF;
6145
6146         /* Block ioctls in VF mode */
6147         if (instance->requestorId && !allow_vf_ioctls) {
6148                 error = -ENODEV;
6149                 goto out_kfree_ioc;
6150         }
6151
6152         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
6153                 printk(KERN_ERR "Controller in crit error\n");
6154                 error = -ENODEV;
6155                 goto out_kfree_ioc;
6156         }
6157
6158         if (instance->unload == 1) {
6159                 error = -ENODEV;
6160                 goto out_kfree_ioc;
6161         }
6162
6163         /*
6164          * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
6165          */
6166         if (down_interruptible(&instance->ioctl_sem)) {
6167                 error = -ERESTARTSYS;
6168                 goto out_kfree_ioc;
6169         }
6170
6171         for (i = 0; i < wait_time; i++) {
6172
6173                 spin_lock_irqsave(&instance->hba_lock, flags);
6174                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
6175                         spin_unlock_irqrestore(&instance->hba_lock, flags);
6176                         break;
6177                 }
6178                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6179
6180                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
6181                         printk(KERN_NOTICE "megasas: waiting"
6182                                 "for controller reset to finish\n");
6183                 }
6184
6185                 msleep(1000);
6186         }
6187
6188         spin_lock_irqsave(&instance->hba_lock, flags);
6189         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
6190                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6191
6192                 printk(KERN_ERR "megaraid_sas: timed out while"
6193                         "waiting for HBA to recover\n");
6194                 error = -ENODEV;
6195                 goto out_up;
6196         }
6197         spin_unlock_irqrestore(&instance->hba_lock, flags);
6198
6199         error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
6200       out_up:
6201         up(&instance->ioctl_sem);
6202
6203       out_kfree_ioc:
6204         kfree(ioc);
6205         return error;
6206 }
6207
6208 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
6209 {
6210         struct megasas_instance *instance;
6211         struct megasas_aen aen;
6212         int error;
6213         int i;
6214         unsigned long flags;
6215         u32 wait_time = MEGASAS_RESET_WAIT_TIME;
6216
6217         if (file->private_data != file) {
6218                 printk(KERN_DEBUG "megasas: fasync_helper was not "
6219                        "called first\n");
6220                 return -EINVAL;
6221         }
6222
6223         if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
6224                 return -EFAULT;
6225
6226         instance = megasas_lookup_instance(aen.host_no);
6227
6228         if (!instance)
6229                 return -ENODEV;
6230
6231         if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
6232                 return -ENODEV;
6233         }
6234
6235         if (instance->unload == 1) {
6236                 return -ENODEV;
6237         }
6238
6239         for (i = 0; i < wait_time; i++) {
6240
6241                 spin_lock_irqsave(&instance->hba_lock, flags);
6242                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
6243                         spin_unlock_irqrestore(&instance->hba_lock,
6244                                                 flags);
6245                         break;
6246                 }
6247
6248                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6249
6250                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
6251                         printk(KERN_NOTICE "megasas: waiting for"
6252                                 "controller reset to finish\n");
6253                 }
6254
6255                 msleep(1000);
6256         }
6257
6258         spin_lock_irqsave(&instance->hba_lock, flags);
6259         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
6260                 spin_unlock_irqrestore(&instance->hba_lock, flags);
6261                 printk(KERN_ERR "megaraid_sas: timed out while waiting"
6262                                 "for HBA to recover.\n");
6263                 return -ENODEV;
6264         }
6265         spin_unlock_irqrestore(&instance->hba_lock, flags);
6266
6267         mutex_lock(&instance->aen_mutex);
6268         error = megasas_register_aen(instance, aen.seq_num,
6269                                      aen.class_locale_word);
6270         mutex_unlock(&instance->aen_mutex);
6271         return error;
6272 }
6273
6274 /**
6275  * megasas_mgmt_ioctl - char node ioctl entry point
6276  */
6277 static long
6278 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
6279 {
6280         switch (cmd) {
6281         case MEGASAS_IOC_FIRMWARE:
6282                 return megasas_mgmt_ioctl_fw(file, arg);
6283
6284         case MEGASAS_IOC_GET_AEN:
6285                 return megasas_mgmt_ioctl_aen(file, arg);
6286         }
6287
6288         return -ENOTTY;
6289 }
6290
6291 #ifdef CONFIG_COMPAT
6292 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
6293 {
6294         struct compat_megasas_iocpacket __user *cioc =
6295             (struct compat_megasas_iocpacket __user *)arg;
6296         struct megasas_iocpacket __user *ioc =
6297             compat_alloc_user_space(sizeof(struct megasas_iocpacket));
6298         int i;
6299         int error = 0;
6300         compat_uptr_t ptr;
6301
6302         if (clear_user(ioc, sizeof(*ioc)))
6303                 return -EFAULT;
6304
6305         if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
6306             copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
6307             copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
6308             copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
6309             copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
6310             copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
6311                 return -EFAULT;
6312
6313         /*
6314          * The sense_ptr is used in megasas_mgmt_fw_ioctl only when
6315          * sense_len is not null, so prepare the 64bit value under
6316          * the same condition.
6317          */
6318         if (ioc->sense_len) {
6319                 void __user **sense_ioc_ptr =
6320                         (void __user **)(ioc->frame.raw + ioc->sense_off);
6321                 compat_uptr_t *sense_cioc_ptr =
6322                         (compat_uptr_t *)(cioc->frame.raw + cioc->sense_off);
6323                 if (get_user(ptr, sense_cioc_ptr) ||
6324                     put_user(compat_ptr(ptr), sense_ioc_ptr))
6325                         return -EFAULT;
6326         }
6327
6328         for (i = 0; i < MAX_IOCTL_SGE; i++) {
6329                 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
6330                     put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
6331                     copy_in_user(&ioc->sgl[i].iov_len,
6332                                  &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
6333                         return -EFAULT;
6334         }
6335
6336         error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
6337
6338         if (copy_in_user(&cioc->frame.hdr.cmd_status,
6339                          &ioc->frame.hdr.cmd_status, sizeof(u8))) {
6340                 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
6341                 return -EFAULT;
6342         }
6343         return error;
6344 }
6345
6346 static long
6347 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
6348                           unsigned long arg)
6349 {
6350         switch (cmd) {
6351         case MEGASAS_IOC_FIRMWARE32:
6352                 return megasas_mgmt_compat_ioctl_fw(file, arg);
6353         case MEGASAS_IOC_GET_AEN:
6354                 return megasas_mgmt_ioctl_aen(file, arg);
6355         }
6356
6357         return -ENOTTY;
6358 }
6359 #endif
6360
6361 /*
6362  * File operations structure for management interface
6363  */
6364 static const struct file_operations megasas_mgmt_fops = {
6365         .owner = THIS_MODULE,
6366         .open = megasas_mgmt_open,
6367         .fasync = megasas_mgmt_fasync,
6368         .unlocked_ioctl = megasas_mgmt_ioctl,
6369         .poll = megasas_mgmt_poll,
6370 #ifdef CONFIG_COMPAT
6371         .compat_ioctl = megasas_mgmt_compat_ioctl,
6372 #endif
6373         .llseek = noop_llseek,
6374 };
6375
6376 /*
6377  * PCI hotplug support registration structure
6378  */
6379 static struct pci_driver megasas_pci_driver = {
6380
6381         .name = "megaraid_sas",
6382         .id_table = megasas_pci_table,
6383         .probe = megasas_probe_one,
6384         .remove = megasas_detach_one,
6385         .suspend = megasas_suspend,
6386         .resume = megasas_resume,
6387         .shutdown = megasas_shutdown,
6388 };
6389
6390 /*
6391  * Sysfs driver attributes
6392  */
6393 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
6394 {
6395         return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
6396                         MEGASAS_VERSION);
6397 }
6398
6399 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
6400
6401 static ssize_t
6402 megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
6403 {
6404         return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
6405                         MEGASAS_RELDATE);
6406 }
6407
6408 static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
6409                    NULL);
6410
6411 static ssize_t
6412 megasas_sysfs_show_support_poll_for_event(struct device_driver *dd, char *buf)
6413 {
6414         return sprintf(buf, "%u\n", support_poll_for_event);
6415 }
6416
6417 static DRIVER_ATTR(support_poll_for_event, S_IRUGO,
6418                         megasas_sysfs_show_support_poll_for_event, NULL);
6419
6420  static ssize_t
6421 megasas_sysfs_show_support_device_change(struct device_driver *dd, char *buf)
6422 {
6423         return sprintf(buf, "%u\n", support_device_change);
6424 }
6425
6426 static DRIVER_ATTR(support_device_change, S_IRUGO,
6427                         megasas_sysfs_show_support_device_change, NULL);
6428
6429 static ssize_t
6430 megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
6431 {
6432         return sprintf(buf, "%u\n", megasas_dbg_lvl);
6433 }
6434
6435 static ssize_t
6436 megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count)
6437 {
6438         int retval = count;
6439         if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){
6440                 printk(KERN_ERR "megasas: could not set dbg_lvl\n");
6441                 retval = -EINVAL;
6442         }
6443         return retval;
6444 }
6445
6446 static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUSR, megasas_sysfs_show_dbg_lvl,
6447                 megasas_sysfs_set_dbg_lvl);
6448
6449 static void
6450 megasas_aen_polling(struct work_struct *work)
6451 {
6452         struct megasas_aen_event *ev =
6453                 container_of(work, struct megasas_aen_event, hotplug_work.work);
6454         struct megasas_instance *instance = ev->instance;
6455         union megasas_evt_class_locale class_locale;
6456         struct  Scsi_Host *host;
6457         struct  scsi_device *sdev1;
6458         u16     pd_index = 0;
6459         u16     ld_index = 0;
6460         int     i, j, doscan = 0;
6461         u32 seq_num, wait_time = MEGASAS_RESET_WAIT_TIME;
6462         int error;
6463
6464         if (!instance) {
6465                 printk(KERN_ERR "invalid instance!\n");
6466                 kfree(ev);
6467                 return;
6468         }
6469
6470         /* Adjust event workqueue thread wait time for VF mode */
6471         if (instance->requestorId)
6472                 wait_time = MEGASAS_ROUTINE_WAIT_TIME_VF;
6473
6474         /* Don't run the event workqueue thread if OCR is running */
6475         for (i = 0; i < wait_time; i++) {
6476                 if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL)
6477                         break;
6478                 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
6479                         printk(KERN_NOTICE "megasas: %s waiting for "
6480                                "controller reset to finish for scsi%d\n",
6481                                __func__, instance->host->host_no);
6482                 }
6483                 msleep(1000);
6484         }
6485
6486         instance->ev = NULL;
6487         host = instance->host;
6488         if (instance->evt_detail) {
6489
6490                 switch (le32_to_cpu(instance->evt_detail->code)) {
6491                 case MR_EVT_PD_INSERTED:
6492                         if (megasas_get_pd_list(instance) == 0) {
6493                         for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
6494                                 for (j = 0;
6495                                 j < MEGASAS_MAX_DEV_PER_CHANNEL;
6496                                 j++) {
6497
6498                                 pd_index =
6499                                 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6500
6501                                 sdev1 =
6502                                 scsi_device_lookup(host, i, j, 0);
6503
6504                                 if (instance->pd_list[pd_index].driveState
6505                                                 == MR_PD_STATE_SYSTEM) {
6506                                                 if (!sdev1) {
6507                                                 scsi_add_device(host, i, j, 0);
6508                                                 }
6509
6510                                         if (sdev1)
6511                                                 scsi_device_put(sdev1);
6512                                         }
6513                                 }
6514                         }
6515                         }
6516                         doscan = 0;
6517                         break;
6518
6519                 case MR_EVT_PD_REMOVED:
6520                         if (megasas_get_pd_list(instance) == 0) {
6521                         for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
6522                                 for (j = 0;
6523                                 j < MEGASAS_MAX_DEV_PER_CHANNEL;
6524                                 j++) {
6525
6526                                 pd_index =
6527                                 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6528
6529                                 sdev1 =
6530                                 scsi_device_lookup(host, i, j, 0);
6531
6532                                 if (instance->pd_list[pd_index].driveState
6533                                         == MR_PD_STATE_SYSTEM) {
6534                                         if (sdev1) {
6535                                                 scsi_device_put(sdev1);
6536                                         }
6537                                 } else {
6538                                         if (sdev1) {
6539                                                 scsi_remove_device(sdev1);
6540                                                 scsi_device_put(sdev1);
6541                                         }
6542                                 }
6543                                 }
6544                         }
6545                         }
6546                         doscan = 0;
6547                         break;
6548
6549                 case MR_EVT_LD_OFFLINE:
6550                 case MR_EVT_CFG_CLEARED:
6551                 case MR_EVT_LD_DELETED:
6552                         if (!instance->requestorId ||
6553                             (instance->requestorId &&
6554                              megasas_get_ld_vf_affiliation(instance, 0))) {
6555                                 if (megasas_ld_list_query(instance,
6556                                                           MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
6557                                         megasas_get_ld_list(instance);
6558                                 for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
6559                                         for (j = 0;
6560                                              j < MEGASAS_MAX_DEV_PER_CHANNEL;
6561                                              j++) {
6562
6563                                                 ld_index =
6564                                                         (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6565
6566                                                 sdev1 = scsi_device_lookup(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6567
6568                                                 if (instance->ld_ids[ld_index]
6569                                                     != 0xff) {
6570                                                         if (sdev1)
6571                                                                 scsi_device_put(sdev1);
6572                                                 } else {
6573                                                         if (sdev1) {
6574                                                                 scsi_remove_device(sdev1);
6575                                                                 scsi_device_put(sdev1);
6576                                                         }
6577                                                 }
6578                                         }
6579                                 }
6580                                 doscan = 0;
6581                         }
6582                         break;
6583                 case MR_EVT_LD_CREATED:
6584                         if (!instance->requestorId ||
6585                             (instance->requestorId &&
6586                              megasas_get_ld_vf_affiliation(instance, 0))) {
6587                                 if (megasas_ld_list_query(instance,
6588                                                           MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
6589                                         megasas_get_ld_list(instance);
6590                                 for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
6591                                         for (j = 0;
6592                                              j < MEGASAS_MAX_DEV_PER_CHANNEL;
6593                                              j++) {
6594                                                 ld_index =
6595                                                         (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6596
6597                                                 sdev1 = scsi_device_lookup(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6598
6599                                                 if (instance->ld_ids[ld_index]
6600                                                     != 0xff) {
6601                                                         if (!sdev1)
6602                                                                 scsi_add_device(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6603                                                 }
6604                                                 if (sdev1)
6605                                                         scsi_device_put(sdev1);
6606                                         }
6607                                 }
6608                                 doscan = 0;
6609                         }
6610                         break;
6611                 case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
6612                 case MR_EVT_FOREIGN_CFG_IMPORTED:
6613                 case MR_EVT_LD_STATE_CHANGE:
6614                         doscan = 1;
6615                         break;
6616                 default:
6617                         doscan = 0;
6618                         break;
6619                 }
6620         } else {
6621                 printk(KERN_ERR "invalid evt_detail!\n");
6622                 kfree(ev);
6623                 return;
6624         }
6625
6626         if (doscan) {
6627                 printk(KERN_INFO "megaraid_sas: scanning for scsi%d...\n",
6628                        instance->host->host_no);
6629                 if (megasas_get_pd_list(instance) == 0) {
6630                         for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
6631                                 for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
6632                                         pd_index = i*MEGASAS_MAX_DEV_PER_CHANNEL + j;
6633                                         sdev1 = scsi_device_lookup(host, i, j, 0);
6634                                         if (instance->pd_list[pd_index].driveState ==
6635                                             MR_PD_STATE_SYSTEM) {
6636                                                 if (!sdev1) {
6637                                                         scsi_add_device(host, i, j, 0);
6638                                                 }
6639                                                 if (sdev1)
6640                                                         scsi_device_put(sdev1);
6641                                         } else {
6642                                                 if (sdev1) {
6643                                                         scsi_remove_device(sdev1);
6644                                                         scsi_device_put(sdev1);
6645                                                 }
6646                                         }
6647                                 }
6648                         }
6649                 }
6650
6651                 if (!instance->requestorId ||
6652                     (instance->requestorId &&
6653                      megasas_get_ld_vf_affiliation(instance, 0))) {
6654                         if (megasas_ld_list_query(instance,
6655                                                   MR_LD_QUERY_TYPE_EXPOSED_TO_HOST))
6656                                 megasas_get_ld_list(instance);
6657                         for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
6658                                 for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL;
6659                                      j++) {
6660                                         ld_index =
6661                                                 (i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
6662
6663                                         sdev1 = scsi_device_lookup(host,
6664                                                                    MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6665                                         if (instance->ld_ids[ld_index]
6666                                             != 0xff) {
6667                                                 if (!sdev1)
6668                                                         scsi_add_device(host, MEGASAS_MAX_PD_CHANNELS + i, j, 0);
6669                                                 else
6670                                                         scsi_device_put(sdev1);
6671                                         } else {
6672                                                 if (sdev1) {
6673                                                         scsi_remove_device(sdev1);
6674                                                         scsi_device_put(sdev1);
6675                                                 }
6676                                         }
6677                                 }
6678                         }
6679                 }
6680         }
6681
6682         if ( instance->aen_cmd != NULL ) {
6683                 kfree(ev);
6684                 return ;
6685         }
6686
6687         seq_num = le32_to_cpu(instance->evt_detail->seq_num) + 1;
6688
6689         /* Register AEN with FW for latest sequence number plus 1 */
6690         class_locale.members.reserved = 0;
6691         class_locale.members.locale = MR_EVT_LOCALE_ALL;
6692         class_locale.members.class = MR_EVT_CLASS_DEBUG;
6693         mutex_lock(&instance->aen_mutex);
6694         error = megasas_register_aen(instance, seq_num,
6695                                         class_locale.word);
6696         mutex_unlock(&instance->aen_mutex);
6697
6698         if (error)
6699                 printk(KERN_ERR "register aen failed error %x\n", error);
6700
6701         kfree(ev);
6702 }
6703
6704 /**
6705  * megasas_init - Driver load entry point
6706  */
6707 static int __init megasas_init(void)
6708 {
6709         int rval;
6710
6711         /*
6712          * Announce driver version and other information
6713          */
6714         printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
6715                MEGASAS_EXT_VERSION);
6716
6717         spin_lock_init(&poll_aen_lock);
6718
6719         support_poll_for_event = 2;
6720         support_device_change = 1;
6721
6722         memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
6723
6724         /*
6725          * Register character device node
6726          */
6727         rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
6728
6729         if (rval < 0) {
6730                 printk(KERN_DEBUG "megasas: failed to open device node\n");
6731                 return rval;
6732         }
6733
6734         megasas_mgmt_majorno = rval;
6735
6736         /*
6737          * Register ourselves as PCI hotplug module
6738          */
6739         rval = pci_register_driver(&megasas_pci_driver);
6740
6741         if (rval) {
6742                 printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
6743                 goto err_pcidrv;
6744         }
6745
6746         rval = driver_create_file(&megasas_pci_driver.driver,
6747                                   &driver_attr_version);
6748         if (rval)
6749                 goto err_dcf_attr_ver;
6750         rval = driver_create_file(&megasas_pci_driver.driver,
6751                                   &driver_attr_release_date);
6752         if (rval)
6753                 goto err_dcf_rel_date;
6754
6755         rval = driver_create_file(&megasas_pci_driver.driver,
6756                                 &driver_attr_support_poll_for_event);
6757         if (rval)
6758                 goto err_dcf_support_poll_for_event;
6759
6760         rval = driver_create_file(&megasas_pci_driver.driver,
6761                                   &driver_attr_dbg_lvl);
6762         if (rval)
6763                 goto err_dcf_dbg_lvl;
6764         rval = driver_create_file(&megasas_pci_driver.driver,
6765                                 &driver_attr_support_device_change);
6766         if (rval)
6767                 goto err_dcf_support_device_change;
6768
6769         return rval;
6770
6771 err_dcf_support_device_change:
6772         driver_remove_file(&megasas_pci_driver.driver,
6773                            &driver_attr_dbg_lvl);
6774 err_dcf_dbg_lvl:
6775         driver_remove_file(&megasas_pci_driver.driver,
6776                         &driver_attr_support_poll_for_event);
6777
6778 err_dcf_support_poll_for_event:
6779         driver_remove_file(&megasas_pci_driver.driver,
6780                            &driver_attr_release_date);
6781
6782 err_dcf_rel_date:
6783         driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
6784 err_dcf_attr_ver:
6785         pci_unregister_driver(&megasas_pci_driver);
6786 err_pcidrv:
6787         unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
6788         return rval;
6789 }
6790
6791 /**
6792  * megasas_exit - Driver unload entry point
6793  */
6794 static void __exit megasas_exit(void)
6795 {
6796         driver_remove_file(&megasas_pci_driver.driver,
6797                            &driver_attr_dbg_lvl);
6798         driver_remove_file(&megasas_pci_driver.driver,
6799                         &driver_attr_support_poll_for_event);
6800         driver_remove_file(&megasas_pci_driver.driver,
6801                         &driver_attr_support_device_change);
6802         driver_remove_file(&megasas_pci_driver.driver,
6803                            &driver_attr_release_date);
6804         driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
6805
6806         pci_unregister_driver(&megasas_pci_driver);
6807         unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
6808 }
6809
6810 module_init(megasas_init);
6811 module_exit(megasas_exit);