drivers/infiniband/hw/ehca/ehca_main.c

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  module start stop, hca detection
   5  *
   6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
   7  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
   8  *           Joachim Fenkes <fenkes@de.ibm.com>
   9  *
  10  *  Copyright (c) 2005 IBM Corporation
  11  *
  12  *  All rights reserved.
  13  *
  14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  15  *  BSD.
  16  *
  17  * OpenIB BSD License
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions are met:
  21  *
  22  * Redistributions of source code must retain the above copyright notice, this
  23  * list of conditions and the following disclaimer.
  24  *
  25  * Redistributions in binary form must reproduce the above copyright notice,
  26  * this list of conditions and the following disclaimer in the documentation
  27  * and/or other materials
  28  * provided with the distribution.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  40  * POSSIBILITY OF SUCH DAMAGE.
  41  */
  42
  43 #ifdef CONFIG_PPC_64K_PAGES
  44 #include <linux/slab.h>
  45 #endif
  46
  47 #include "ehca_classes.h"
  48 #include "ehca_iverbs.h"
  49 #include "ehca_mrmw.h"
  50 #include "ehca_tools.h"
  51 #include "hcp_if.h"
  52
  53 #define HCAD_VERSION "0026"
  54
  55 MODULE_LICENSE("Dual BSD/GPL");
  56 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  57 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
  58 MODULE_VERSION(HCAD_VERSION);
  59
  60 static int ehca_open_aqp1     = 0;
  61 static int ehca_hw_level      = 0;
  62 static int ehca_poll_all_eqs  = 1;
  63
  64 int ehca_debug_level   = 0;
  65 int ehca_nr_ports      = 2;
  66 int ehca_use_hp_mr     = 0;
  67 int ehca_port_act_time = 30;
  68 int ehca_static_rate   = -1;
  69 int ehca_scaling_code  = 0;
  70 int ehca_lock_hcalls   = -1;
  71 int ehca_max_cq        = -1;
  72 int ehca_max_qp        = -1;
  73
  74 module_param_named(open_aqp1,     ehca_open_aqp1,     bool, S_IRUGO);
  75 module_param_named(debug_level,   ehca_debug_level,   int,  S_IRUGO);
  76 module_param_named(hw_level,      ehca_hw_level,      int,  S_IRUGO);
  77 module_param_named(nr_ports,      ehca_nr_ports,      int,  S_IRUGO);
  78 module_param_named(use_hp_mr,     ehca_use_hp_mr,     bool, S_IRUGO);
  79 module_param_named(port_act_time, ehca_port_act_time, int,  S_IRUGO);
  80 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  bool, S_IRUGO);
  81 module_param_named(static_rate,   ehca_static_rate,   int,  S_IRUGO);
  82 module_param_named(scaling_code,  ehca_scaling_code,  bool, S_IRUGO);
  83 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bool, S_IRUGO);
  84 module_param_named(number_of_cqs, ehca_max_cq,        int,  S_IRUGO);
  85 module_param_named(number_of_qps, ehca_max_qp,        int,  S_IRUGO);
  86
  87 MODULE_PARM_DESC(open_aqp1,
  88                  "Open AQP1 on startup (default: no)");
  89 MODULE_PARM_DESC(debug_level,
  90                  "Amount of debug output (0: none (default), 1: traces, "
  91                  "2: some dumps, 3: lots)");
  92 MODULE_PARM_DESC(hw_level,
  93                  "Hardware level (0: autosensing (default), "
  94                  "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
  95 MODULE_PARM_DESC(nr_ports,
  96                  "number of connected ports (-1: autodetect, 1: port one only, "
  97                  "2: two ports (default)");
  98 MODULE_PARM_DESC(use_hp_mr,
  99                  "Use high performance MRs (default: no)");
 100 MODULE_PARM_DESC(port_act_time,
 101                  "Time to wait for port activation (default: 30 sec)");
 102 MODULE_PARM_DESC(poll_all_eqs,
 103                  "Poll all event queues periodically (default: yes)");
 104 MODULE_PARM_DESC(static_rate,
 105                  "Set permanent static rate (default: no static rate)");
 106 MODULE_PARM_DESC(scaling_code,
 107                  "Enable scaling code (default: no)");
 108 MODULE_PARM_DESC(lock_hcalls,
 109                  "Serialize all hCalls made by the driver "
 110                  "(default: autodetect)");
 111 MODULE_PARM_DESC(number_of_cqs,
 112                 "Max number of CQs which can be allocated "
 113                 "(default: autodetect)");
 114 MODULE_PARM_DESC(number_of_qps,
 115                 "Max number of QPs which can be allocated "
 116                 "(default: autodetect)");
 117
 118 DEFINE_RWLOCK(ehca_qp_idr_lock);
 119 DEFINE_RWLOCK(ehca_cq_idr_lock);
 120 DEFINE_IDR(ehca_qp_idr);
 121 DEFINE_IDR(ehca_cq_idr);
 122
 123 static LIST_HEAD(shca_list); /* list of all registered ehcas */
 124 static DEFINE_SPINLOCK(shca_list_lock);
 125
 126 static struct timer_list poll_eqs_timer;
 127
 128 #ifdef CONFIG_PPC_64K_PAGES
 129 static struct kmem_cache *ctblk_cache;
 130
 131 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
 132 {
 133         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
 134         if (!ret)
 135                 ehca_gen_err("Out of memory for ctblk");
 136         return ret;
 137 }
 138
 139 void ehca_free_fw_ctrlblock(void *ptr)
 140 {
 141         if (ptr)
 142                 kmem_cache_free(ctblk_cache, ptr);
 143
 144 }
 145 #endif
 146
 147 int ehca2ib_return_code(u64 ehca_rc)
 148 {
 149         switch (ehca_rc) {
 150         case H_SUCCESS:
 151                 return 0;
 152         case H_RESOURCE:             /* Resource in use */
 153         case H_BUSY:
 154                 return -EBUSY;
 155         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
 156         case H_CONSTRAINED:          /* resource constraint */
 157         case H_NO_MEM:
 158                 return -ENOMEM;
 159         default:
 160                 return -EINVAL;
 161         }
 162 }
 163
 164 static int ehca_create_slab_caches(void)
 165 {
 166         int ret;
 167
 168         ret = ehca_init_pd_cache();
 169         if (ret) {
 170                 ehca_gen_err("Cannot create PD SLAB cache.");
 171                 return ret;
 172         }
 173
 174         ret = ehca_init_cq_cache();
 175         if (ret) {
 176                 ehca_gen_err("Cannot create CQ SLAB cache.");
 177                 goto create_slab_caches2;
 178         }
 179
 180         ret = ehca_init_qp_cache();
 181         if (ret) {
 182                 ehca_gen_err("Cannot create QP SLAB cache.");
 183                 goto create_slab_caches3;
 184         }
 185
 186         ret = ehca_init_av_cache();
 187         if (ret) {
 188                 ehca_gen_err("Cannot create AV SLAB cache.");
 189                 goto create_slab_caches4;
 190         }
 191
 192         ret = ehca_init_mrmw_cache();
 193         if (ret) {
 194                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
 195                 goto create_slab_caches5;
 196         }
 197
 198         ret = ehca_init_small_qp_cache();
 199         if (ret) {
 200                 ehca_gen_err("Cannot create small queue SLAB cache.");
 201                 goto create_slab_caches6;
 202         }
 203
 204 #ifdef CONFIG_PPC_64K_PAGES
 205         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
 206                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
 207                                         SLAB_HWCACHE_ALIGN,
 208                                         NULL);
 209         if (!ctblk_cache) {
 210                 ehca_gen_err("Cannot create ctblk SLAB cache.");
 211                 ehca_cleanup_small_qp_cache();
 212                 goto create_slab_caches6;
 213         }
 214 #endif
 215         return 0;
 216
 217 create_slab_caches6:
 218         ehca_cleanup_mrmw_cache();
 219
 220 create_slab_caches5:
 221         ehca_cleanup_av_cache();
 222
 223 create_slab_caches4:
 224         ehca_cleanup_qp_cache();
 225
 226 create_slab_caches3:
 227         ehca_cleanup_cq_cache();
 228
 229 create_slab_caches2:
 230         ehca_cleanup_pd_cache();
 231
 232         return ret;
 233 }
 234
 235 static void ehca_destroy_slab_caches(void)
 236 {
 237         ehca_cleanup_small_qp_cache();
 238         ehca_cleanup_mrmw_cache();
 239         ehca_cleanup_av_cache();
 240         ehca_cleanup_qp_cache();
 241         ehca_cleanup_cq_cache();
 242         ehca_cleanup_pd_cache();
 243 #ifdef CONFIG_PPC_64K_PAGES
 244         if (ctblk_cache)
 245                 kmem_cache_destroy(ctblk_cache);
 246 #endif
 247 }
 248
 249 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
 250 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
 251
 252 static struct cap_descr {
 253         u64 mask;
 254         char *descr;
 255 } hca_cap_descr[] = {
 256         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
 257         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
 258         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
 259         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
 260         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
 261         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
 262         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
 263         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
 264         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
 265         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
 266         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
 267         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
 268         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
 269         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
 270         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
 271         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
 272         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
 273         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
 274 };
 275
 276 static int ehca_sense_attributes(struct ehca_shca *shca)
 277 {
 278         int i, ret = 0;
 279         u64 h_ret;
 280         struct hipz_query_hca *rblock;
 281         struct hipz_query_port *port;
 282         const char *loc_code;
 283
 284         static const u32 pgsize_map[] = {
 285                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
 286                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
 287                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
 288                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
 289         };
 290
 291         ehca_gen_dbg("Probing adapter %s...",
 292                      shca->ofdev->node->full_name);
 293         loc_code = of_get_property(shca->ofdev->node, "ibm,loc-code", NULL);
 294         if (loc_code)
 295                 ehca_gen_dbg(" ... location lode=%s", loc_code);
 296
 297         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 298         if (!rblock) {
 299                 ehca_gen_err("Cannot allocate rblock memory.");
 300                 return -ENOMEM;
 301         }
 302
 303         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
 304         if (h_ret != H_SUCCESS) {
 305                 ehca_gen_err("Cannot query device properties. h_ret=%li",
 306                              h_ret);
 307                 ret = -EPERM;
 308                 goto sense_attributes1;
 309         }
 310
 311         if (ehca_nr_ports == 1)
 312                 shca->num_ports = 1;
 313         else
 314                 shca->num_ports = (u8)rblock->num_ports;
 315
 316         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
 317
 318         if (ehca_hw_level == 0) {
 319                 u32 hcaaver;
 320                 u32 revid;
 321
 322                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
 323                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
 324
 325                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
 326
 327                 if (hcaaver == 1) {
 328                         if (revid <= 3)
 329                                 shca->hw_level = 0x10 | (revid + 1);
 330                         else
 331                                 shca->hw_level = 0x14;
 332                 } else if (hcaaver == 2) {
 333                         if (revid == 0)
 334                                 shca->hw_level = 0x21;
 335                         else if (revid == 0x10)
 336                                 shca->hw_level = 0x22;
 337                         else if (revid == 0x20 || revid == 0x21)
 338                                 shca->hw_level = 0x23;
 339                 }
 340
 341                 if (!shca->hw_level) {
 342                         ehca_gen_warn("unknown hardware version"
 343                                       " - assuming default level");
 344                         shca->hw_level = 0x22;
 345                 }
 346         } else
 347                 shca->hw_level = ehca_hw_level;
 348         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
 349
 350         shca->hca_cap = rblock->hca_cap_indicators;
 351         ehca_gen_dbg(" ... HCA capabilities:");
 352         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
 353                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
 354                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
 355
 356         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
 357          * a firmware property, so it's valid across all adapters
 358          */
 359         if (ehca_lock_hcalls == -1)
 360                 ehca_lock_hcalls = !(shca->hca_cap & HCA_CAP_H_ALLOC_RES_SYNC);
 361
 362         /* translate supported MR page sizes; always support 4K */
 363         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
 364         for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
 365                 if (rblock->memory_page_size_supported & pgsize_map[i])
 366                         shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
 367
 368         /* Set maximum number of CQs and QPs to calculate EQ size */
 369         if (shca->max_num_qps == -1)
 370                 shca->max_num_qps = min_t(int, rblock->max_qp,
 371                                           EHCA_MAX_NUM_QUEUES);
 372         else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
 373                 ehca_gen_warn("The requested number of QPs is out of range "
 374                               "(1 - %i) specified by HW. Value is set to %i",
 375                               rblock->max_qp, rblock->max_qp);
 376                 shca->max_num_qps = rblock->max_qp;
 377         }
 378
 379         if (shca->max_num_cqs == -1)
 380                 shca->max_num_cqs = min_t(int, rblock->max_cq,
 381                                           EHCA_MAX_NUM_QUEUES);
 382         else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
 383                 ehca_gen_warn("The requested number of CQs is out of range "
 384                               "(1 - %i) specified by HW. Value is set to %i",
 385                               rblock->max_cq, rblock->max_cq);
 386         }
 387
 388         /* query max MTU from first port -- it's the same for all ports */
 389         port = (struct hipz_query_port *)rblock;
 390         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
 391         if (h_ret != H_SUCCESS) {
 392                 ehca_gen_err("Cannot query port properties. h_ret=%li",
 393                              h_ret);
 394                 ret = -EPERM;
 395                 goto sense_attributes1;
 396         }
 397
 398         shca->max_mtu = port->max_mtu;
 399
 400 sense_attributes1:
 401         ehca_free_fw_ctrlblock(rblock);
 402         return ret;
 403 }
 404
 405 static int init_node_guid(struct ehca_shca *shca)
 406 {
 407         int ret = 0;
 408         struct hipz_query_hca *rblock;
 409
 410         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 411         if (!rblock) {
 412                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
 413                 return -ENOMEM;
 414         }
 415
 416         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
 417                 ehca_err(&shca->ib_device, "Can't query device properties");
 418                 ret = -EINVAL;
 419                 goto init_node_guid1;
 420         }
 421
 422         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
 423
 424 init_node_guid1:
 425         ehca_free_fw_ctrlblock(rblock);
 426         return ret;
 427 }
 428
 429 static int ehca_init_device(struct ehca_shca *shca)
 430 {
 431         int ret;
 432
 433         ret = init_node_guid(shca);
 434         if (ret)
 435                 return ret;
 436
 437         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
 438         shca->ib_device.owner               = THIS_MODULE;
 439
 440         shca->ib_device.uverbs_abi_ver      = 8;
 441         shca->ib_device.uverbs_cmd_mask     =
 442                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 443                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 444                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 445                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 446                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 447                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 448                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 449                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 450                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 451                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 452                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 453                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 454                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 455                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 456                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 457                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
 458
 459         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
 460         shca->ib_device.phys_port_cnt       = shca->num_ports;
 461         shca->ib_device.num_comp_vectors    = 1;
 462         shca->ib_device.dma_device          = &shca->ofdev->dev;
 463         shca->ib_device.query_device        = ehca_query_device;
 464         shca->ib_device.query_port          = ehca_query_port;
 465         shca->ib_device.query_gid           = ehca_query_gid;
 466         shca->ib_device.query_pkey          = ehca_query_pkey;
 467         /* shca->in_device.modify_device    = ehca_modify_device    */
 468         shca->ib_device.modify_port         = ehca_modify_port;
 469         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
 470         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
 471         shca->ib_device.alloc_pd            = ehca_alloc_pd;
 472         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
 473         shca->ib_device.create_ah           = ehca_create_ah;
 474         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
 475         shca->ib_device.query_ah            = ehca_query_ah;
 476         shca->ib_device.destroy_ah          = ehca_destroy_ah;
 477         shca->ib_device.create_qp           = ehca_create_qp;
 478         shca->ib_device.modify_qp           = ehca_modify_qp;
 479         shca->ib_device.query_qp            = ehca_query_qp;
 480         shca->ib_device.destroy_qp          = ehca_destroy_qp;
 481         shca->ib_device.post_send           = ehca_post_send;
 482         shca->ib_device.post_recv           = ehca_post_recv;
 483         shca->ib_device.create_cq           = ehca_create_cq;
 484         shca->ib_device.destroy_cq          = ehca_destroy_cq;
 485         shca->ib_device.resize_cq           = ehca_resize_cq;
 486         shca->ib_device.poll_cq             = ehca_poll_cq;
 487         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
 488         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
 489         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
 490         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
 491         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
 492         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
 493         shca->ib_device.query_mr            = ehca_query_mr;
 494         shca->ib_device.dereg_mr            = ehca_dereg_mr;
 495         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
 496         shca->ib_device.alloc_mw            = ehca_alloc_mw;
 497         shca->ib_device.bind_mw             = ehca_bind_mw;
 498         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
 499         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
 500         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
 501         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
 502         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
 503         shca->ib_device.attach_mcast        = ehca_attach_mcast;
 504         shca->ib_device.detach_mcast        = ehca_detach_mcast;
 505         shca->ib_device.process_mad         = ehca_process_mad;
 506         shca->ib_device.mmap                = ehca_mmap;
 507
 508         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
 509                 shca->ib_device.uverbs_cmd_mask |=
 510                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
 511                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
 512                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
 513                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
 514
 515                 shca->ib_device.create_srq          = ehca_create_srq;
 516                 shca->ib_device.modify_srq          = ehca_modify_srq;
 517                 shca->ib_device.query_srq           = ehca_query_srq;
 518                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
 519                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
 520         }
 521
 522         return ret;
 523 }
 524
 525 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
 526 {
 527         struct ehca_sport *sport = &shca->sport[port - 1];
 528         struct ib_cq *ibcq;
 529         struct ib_qp *ibqp;
 530         struct ib_qp_init_attr qp_init_attr;
 531         int ret;
 532
 533         if (sport->ibcq_aqp1) {
 534                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
 535                 return -EPERM;
 536         }
 537
 538         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1), 10, 0);
 539         if (IS_ERR(ibcq)) {
 540                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
 541                 return PTR_ERR(ibcq);
 542         }
 543         sport->ibcq_aqp1 = ibcq;
 544
 545         if (sport->ibqp_sqp[IB_QPT_GSI]) {
 546                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
 547                 ret = -EPERM;
 548                 goto create_aqp1;
 549         }
 550
 551         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
 552         qp_init_attr.send_cq          = ibcq;
 553         qp_init_attr.recv_cq          = ibcq;
 554         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
 555         qp_init_attr.cap.max_send_wr  = 100;
 556         qp_init_attr.cap.max_recv_wr  = 100;
 557         qp_init_attr.cap.max_send_sge = 2;
 558         qp_init_attr.cap.max_recv_sge = 1;
 559         qp_init_attr.qp_type          = IB_QPT_GSI;
 560         qp_init_attr.port_num         = port;
 561         qp_init_attr.qp_context       = NULL;
 562         qp_init_attr.event_handler    = NULL;
 563         qp_init_attr.srq              = NULL;
 564
 565         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
 566         if (IS_ERR(ibqp)) {
 567                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
 568                 ret = PTR_ERR(ibqp);
 569                 goto create_aqp1;
 570         }
 571         sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
 572
 573         return 0;
 574
 575 create_aqp1:
 576         ib_destroy_cq(sport->ibcq_aqp1);
 577         return ret;
 578 }
 579
 580 static int ehca_destroy_aqp1(struct ehca_sport *sport)
 581 {
 582         int ret;
 583
 584         ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
 585         if (ret) {
 586                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
 587                 return ret;
 588         }
 589
 590         ret = ib_destroy_cq(sport->ibcq_aqp1);
 591         if (ret)
 592                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
 593
 594         return ret;
 595 }
 596
 597 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
 598 {
 599         return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
 600 }
 601
 602 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
 603                                       const char *buf, size_t count)
 604 {
 605         int value = (*buf) - '0';
 606         if (value >= 0 && value <= 9)
 607                 ehca_debug_level = value;
 608         return 1;
 609 }
 610
 611 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 612                    ehca_show_debug_level, ehca_store_debug_level);
 613
 614 static struct attribute *ehca_drv_attrs[] = {
 615         &driver_attr_debug_level.attr,
 616         NULL
 617 };
 618
 619 static struct attribute_group ehca_drv_attr_grp = {
 620         .attrs = ehca_drv_attrs
 621 };
 622
 623 static struct attribute_group *ehca_drv_attr_groups[] = {
 624         &ehca_drv_attr_grp,
 625         NULL,
 626 };
 627
 628 #define EHCA_RESOURCE_ATTR(name)                                           \
 629 static ssize_t  ehca_show_##name(struct device *dev,                       \
 630                                  struct device_attribute *attr,            \
 631                                  char *buf)                                \
 632 {                                                                          \
 633         struct ehca_shca *shca;                                            \
 634         struct hipz_query_hca *rblock;                                     \
 635         int data;                                                          \
 636                                                                            \
 637         shca = dev->driver_data;                                           \
 638                                                                            \
 639         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
 640         if (!rblock) {                                                     \
 641                 dev_err(dev, "Can't allocate rblock memory.\n");           \
 642                 return 0;                                                  \
 643         }                                                                  \
 644                                                                            \
 645         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
 646                 dev_err(dev, "Can't query device properties\n");           \
 647                 ehca_free_fw_ctrlblock(rblock);                            \
 648                 return 0;                                                  \
 649         }                                                                  \
 650                                                                            \
 651         data = rblock->name;                                               \
 652         ehca_free_fw_ctrlblock(rblock);                                    \
 653                                                                            \
 654         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
 655                 return snprintf(buf, 256, "1\n");                          \
 656         else                                                               \
 657                 return snprintf(buf, 256, "%d\n", data);                   \
 658                                                                            \
 659 }                                                                          \
 660 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
 661
 662 EHCA_RESOURCE_ATTR(num_ports);
 663 EHCA_RESOURCE_ATTR(hw_ver);
 664 EHCA_RESOURCE_ATTR(max_eq);
 665 EHCA_RESOURCE_ATTR(cur_eq);
 666 EHCA_RESOURCE_ATTR(max_cq);
 667 EHCA_RESOURCE_ATTR(cur_cq);
 668 EHCA_RESOURCE_ATTR(max_qp);
 669 EHCA_RESOURCE_ATTR(cur_qp);
 670 EHCA_RESOURCE_ATTR(max_mr);
 671 EHCA_RESOURCE_ATTR(cur_mr);
 672 EHCA_RESOURCE_ATTR(max_mw);
 673 EHCA_RESOURCE_ATTR(cur_mw);
 674 EHCA_RESOURCE_ATTR(max_pd);
 675 EHCA_RESOURCE_ATTR(max_ah);
 676
 677 static ssize_t ehca_show_adapter_handle(struct device *dev,
 678                                         struct device_attribute *attr,
 679                                         char *buf)
 680 {
 681         struct ehca_shca *shca = dev->driver_data;
 682
 683         return sprintf(buf, "%lx\n", shca->ipz_hca_handle.handle);
 684
 685 }
 686 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 687
 688 static struct attribute *ehca_dev_attrs[] = {
 689         &dev_attr_adapter_handle.attr,
 690         &dev_attr_num_ports.attr,
 691         &dev_attr_hw_ver.attr,
 692         &dev_attr_max_eq.attr,
 693         &dev_attr_cur_eq.attr,
 694         &dev_attr_max_cq.attr,
 695         &dev_attr_cur_cq.attr,
 696         &dev_attr_max_qp.attr,
 697         &dev_attr_cur_qp.attr,
 698         &dev_attr_max_mr.attr,
 699         &dev_attr_cur_mr.attr,
 700         &dev_attr_max_mw.attr,
 701         &dev_attr_cur_mw.attr,
 702         &dev_attr_max_pd.attr,
 703         &dev_attr_max_ah.attr,
 704         NULL
 705 };
 706
 707 static struct attribute_group ehca_dev_attr_grp = {
 708         .attrs = ehca_dev_attrs
 709 };
 710
 711 static int __devinit ehca_probe(struct of_device *dev,
 712                                 const struct of_device_id *id)
 713 {
 714         struct ehca_shca *shca;
 715         const u64 *handle;
 716         struct ib_pd *ibpd;
 717         int ret, i, eq_size;
 718
 719         handle = of_get_property(dev->node, "ibm,hca-handle", NULL);
 720         if (!handle) {
 721                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
 722                              dev->node->full_name);
 723                 return -ENODEV;
 724         }
 725
 726         if (!(*handle)) {
 727                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
 728                              dev->node->full_name);
 729                 return -ENODEV;
 730         }
 731
 732         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
 733         if (!shca) {
 734                 ehca_gen_err("Cannot allocate shca memory.");
 735                 return -ENOMEM;
 736         }
 737
 738         mutex_init(&shca->modify_mutex);
 739         atomic_set(&shca->num_cqs, 0);
 740         atomic_set(&shca->num_qps, 0);
 741         shca->max_num_qps = ehca_max_qp;
 742         shca->max_num_cqs = ehca_max_cq;
 743
 744         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
 745                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
 746
 747         shca->ofdev = dev;
 748         shca->ipz_hca_handle.handle = *handle;
 749         dev->dev.driver_data = shca;
 750
 751         ret = ehca_sense_attributes(shca);
 752         if (ret < 0) {
 753                 ehca_gen_err("Cannot sense eHCA attributes.");
 754                 goto probe1;
 755         }
 756
 757         ret = ehca_init_device(shca);
 758         if (ret) {
 759                 ehca_gen_err("Cannot init ehca  device struct");
 760                 goto probe1;
 761         }
 762
 763         eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
 764         /* create event queues */
 765         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
 766         if (ret) {
 767                 ehca_err(&shca->ib_device, "Cannot create EQ.");
 768                 goto probe1;
 769         }
 770
 771         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
 772         if (ret) {
 773                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
 774                 goto probe3;
 775         }
 776
 777         /* create internal protection domain */
 778         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
 779         if (IS_ERR(ibpd)) {
 780                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
 781                 ret = PTR_ERR(ibpd);
 782                 goto probe4;
 783         }
 784
 785         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
 786         shca->pd->ib_pd.device = &shca->ib_device;
 787
 788         /* create internal max MR */
 789         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
 790
 791         if (ret) {
 792                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
 793                          ret);
 794                 goto probe5;
 795         }
 796
 797         ret = ib_register_device(&shca->ib_device);
 798         if (ret) {
 799                 ehca_err(&shca->ib_device,
 800                          "ib_register_device() failed ret=%i", ret);
 801                 goto probe6;
 802         }
 803
 804         /* create AQP1 for port 1 */
 805         if (ehca_open_aqp1 == 1) {
 806                 shca->sport[0].port_state = IB_PORT_DOWN;
 807                 ret = ehca_create_aqp1(shca, 1);
 808                 if (ret) {
 809                         ehca_err(&shca->ib_device,
 810                                  "Cannot create AQP1 for port 1.");
 811                         goto probe7;
 812                 }
 813         }
 814
 815         /* create AQP1 for port 2 */
 816         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
 817                 shca->sport[1].port_state = IB_PORT_DOWN;
 818                 ret = ehca_create_aqp1(shca, 2);
 819                 if (ret) {
 820                         ehca_err(&shca->ib_device,
 821                                  "Cannot create AQP1 for port 2.");
 822                         goto probe8;
 823                 }
 824         }
 825
 826         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 827         if (ret) /* only complain; we can live without attributes */
 828                 ehca_err(&shca->ib_device,
 829                          "Cannot create device attributes  ret=%d", ret);
 830
 831         spin_lock(&shca_list_lock);
 832         list_add(&shca->shca_list, &shca_list);
 833         spin_unlock(&shca_list_lock);
 834
 835         return 0;
 836
 837 probe8:
 838         ret = ehca_destroy_aqp1(&shca->sport[0]);
 839         if (ret)
 840                 ehca_err(&shca->ib_device,
 841                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
 842
 843 probe7:
 844         ib_unregister_device(&shca->ib_device);
 845
 846 probe6:
 847         ret = ehca_dereg_internal_maxmr(shca);
 848         if (ret)
 849                 ehca_err(&shca->ib_device,
 850                          "Cannot destroy internal MR. ret=%x", ret);
 851
 852 probe5:
 853         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 854         if (ret)
 855                 ehca_err(&shca->ib_device,
 856                          "Cannot destroy internal PD. ret=%x", ret);
 857
 858 probe4:
 859         ret = ehca_destroy_eq(shca, &shca->neq);
 860         if (ret)
 861                 ehca_err(&shca->ib_device,
 862                          "Cannot destroy NEQ. ret=%x", ret);
 863
 864 probe3:
 865         ret = ehca_destroy_eq(shca, &shca->eq);
 866         if (ret)
 867                 ehca_err(&shca->ib_device,
 868                          "Cannot destroy EQ. ret=%x", ret);
 869
 870 probe1:
 871         ib_dealloc_device(&shca->ib_device);
 872
 873         return -EINVAL;
 874 }
 875
 876 static int __devexit ehca_remove(struct of_device *dev)
 877 {
 878         struct ehca_shca *shca = dev->dev.driver_data;
 879         int ret;
 880
 881         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
 882
 883         if (ehca_open_aqp1 == 1) {
 884                 int i;
 885                 for (i = 0; i < shca->num_ports; i++) {
 886                         ret = ehca_destroy_aqp1(&shca->sport[i]);
 887                         if (ret)
 888                                 ehca_err(&shca->ib_device,
 889                                          "Cannot destroy AQP1 for port %x "
 890                                          "ret=%i", ret, i);
 891                 }
 892         }
 893
 894         ib_unregister_device(&shca->ib_device);
 895
 896         ret = ehca_dereg_internal_maxmr(shca);
 897         if (ret)
 898                 ehca_err(&shca->ib_device,
 899                          "Cannot destroy internal MR. ret=%i", ret);
 900
 901         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
 902         if (ret)
 903                 ehca_err(&shca->ib_device,
 904                          "Cannot destroy internal PD. ret=%i", ret);
 905
 906         ret = ehca_destroy_eq(shca, &shca->eq);
 907         if (ret)
 908                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
 909
 910         ret = ehca_destroy_eq(shca, &shca->neq);
 911         if (ret)
 912                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
 913
 914         ib_dealloc_device(&shca->ib_device);
 915
 916         spin_lock(&shca_list_lock);
 917         list_del(&shca->shca_list);
 918         spin_unlock(&shca_list_lock);
 919
 920         return ret;
 921 }
 922
 923 static struct of_device_id ehca_device_table[] =
 924 {
 925         {
 926                 .name       = "lhca",
 927                 .compatible = "IBM,lhca",
 928         },
 929         {},
 930 };
 931 MODULE_DEVICE_TABLE(of, ehca_device_table);
 932
 933 static struct of_platform_driver ehca_driver = {
 934         .name        = "ehca",
 935         .match_table = ehca_device_table,
 936         .probe       = ehca_probe,
 937         .remove      = ehca_remove,
 938         .driver      = {
 939                 .groups = ehca_drv_attr_groups,
 940         },
 941 };
 942
 943 void ehca_poll_eqs(unsigned long data)
 944 {
 945         struct ehca_shca *shca;
 946
 947         spin_lock(&shca_list_lock);
 948         list_for_each_entry(shca, &shca_list, shca_list) {
 949                 if (shca->eq.is_initialized) {
 950                         /* call deadman proc only if eq ptr does not change */
 951                         struct ehca_eq *eq = &shca->eq;
 952                         int max = 3;
 953                         volatile u64 q_ofs, q_ofs2;
 954                         u64 flags;
 955                         spin_lock_irqsave(&eq->spinlock, flags);
 956                         q_ofs = eq->ipz_queue.current_q_offset;
 957                         spin_unlock_irqrestore(&eq->spinlock, flags);
 958                         do {
 959                                 spin_lock_irqsave(&eq->spinlock, flags);
 960                                 q_ofs2 = eq->ipz_queue.current_q_offset;
 961                                 spin_unlock_irqrestore(&eq->spinlock, flags);
 962                                 max--;
 963                         } while (q_ofs == q_ofs2 && max > 0);
 964                         if (q_ofs == q_ofs2)
 965                                 ehca_process_eq(shca, 0);
 966                 }
 967         }
 968         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
 969         spin_unlock(&shca_list_lock);
 970 }
 971
 972 static int __init ehca_module_init(void)
 973 {
 974         int ret;
 975
 976         printk(KERN_INFO "eHCA Infiniband Device Driver "
 977                "(Version " HCAD_VERSION ")\n");
 978
 979         ret = ehca_create_comp_pool();
 980         if (ret) {
 981                 ehca_gen_err("Cannot create comp pool.");
 982                 return ret;
 983         }
 984
 985         ret = ehca_create_slab_caches();
 986         if (ret) {
 987                 ehca_gen_err("Cannot create SLAB caches");
 988                 ret = -ENOMEM;
 989                 goto module_init1;
 990         }
 991
 992         ret = ibmebus_register_driver(&ehca_driver);
 993         if (ret) {
 994                 ehca_gen_err("Cannot register eHCA device driver");
 995                 ret = -EINVAL;
 996                 goto module_init2;
 997         }
 998
 999         if (ehca_poll_all_eqs != 1) {
1000                 ehca_gen_err("WARNING!!!");
1001                 ehca_gen_err("It is possible to lose interrupts.");
1002         } else {
1003                 init_timer(&poll_eqs_timer);
1004                 poll_eqs_timer.function = ehca_poll_eqs;
1005                 poll_eqs_timer.expires = jiffies + HZ;
1006                 add_timer(&poll_eqs_timer);
1007         }
1008
1009         return 0;
1010
1011 module_init2:
1012         ehca_destroy_slab_caches();
1013
1014 module_init1:
1015         ehca_destroy_comp_pool();
1016         return ret;
1017 };
1018
1019 static void __exit ehca_module_exit(void)
1020 {
1021         if (ehca_poll_all_eqs == 1)
1022                 del_timer_sync(&poll_eqs_timer);
1023
1024         ibmebus_unregister_driver(&ehca_driver);
1025
1026         ehca_destroy_slab_caches();
1027
1028         ehca_destroy_comp_pool();
1029
1030         idr_destroy(&ehca_cq_idr);
1031         idr_destroy(&ehca_qp_idr);
1032 };
1033
1034 module_init(ehca_module_init);
1035 module_exit(ehca_module_exit);