drivers/infiniband/hw/i40iw/i40iw_utils.c

   1 /*******************************************************************************
   2 *
   3 * Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the
   9 * OpenFabrics.org BSD license below:
  10 *
  11 *   Redistribution and use in source and binary forms, with or
  12 *   without modification, are permitted provided that the following
  13 *   conditions are met:
  14 *
  15 *    - Redistributions of source code must retain the above
  16 *       copyright notice, this list of conditions and the following
  17 *       disclaimer.
  18 *
  19 *    - Redistributions in binary form must reproduce the above
  20 *       copyright notice, this list of conditions and the following
  21 *       disclaimer in the documentation and/or other materials
  22 *       provided with the distribution.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31 * SOFTWARE.
  32 *
  33 *******************************************************************************/
  34
  35 #include <linux/module.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/ethtool.h>
  40 #include <linux/mii.h>
  41 #include <linux/if_vlan.h>
  42 #include <linux/crc32.h>
  43 #include <linux/in.h>
  44 #include <linux/ip.h>
  45 #include <linux/tcp.h>
  46 #include <linux/init.h>
  47 #include <linux/io.h>
  48 #include <asm/irq.h>
  49 #include <asm/byteorder.h>
  50 #include <net/netevent.h>
  51 #include <net/neighbour.h>
  52 #include "i40iw.h"
  53
  54 /**
  55  * i40iw_arp_table - manage arp table
  56  * @iwdev: iwarp device
  57  * @ip_addr: ip address for device
  58  * @mac_addr: mac address ptr
  59  * @action: modify, delete or add
  60  */
  61 int i40iw_arp_table(struct i40iw_device *iwdev,
  62                     __be32 *ip_addr,
  63                     bool ipv4,
  64                     u8 *mac_addr,
  65                     u32 action)
  66 {
  67         int arp_index;
  68         int err;
  69         u32 ip[4];
  70
  71         if (ipv4) {
  72                 memset(ip, 0, sizeof(ip));
  73                 ip[0] = *ip_addr;
  74         } else {
  75                 memcpy(ip, ip_addr, sizeof(ip));
  76         }
  77
  78         for (arp_index = 0; (u32)arp_index < iwdev->arp_table_size; arp_index++)
  79                 if (memcmp(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip)) == 0)
  80                         break;
  81         switch (action) {
  82         case I40IW_ARP_ADD:
  83                 if (arp_index != iwdev->arp_table_size)
  84                         return -1;
  85
  86                 arp_index = 0;
  87                 err = i40iw_alloc_resource(iwdev, iwdev->allocated_arps,
  88                                            iwdev->arp_table_size,
  89                                            (u32 *)&arp_index,
  90                                            &iwdev->next_arp_index);
  91
  92                 if (err)
  93                         return err;
  94
  95                 memcpy(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip));
  96                 ether_addr_copy(iwdev->arp_table[arp_index].mac_addr, mac_addr);
  97                 break;
  98         case I40IW_ARP_RESOLVE:
  99                 if (arp_index == iwdev->arp_table_size)
 100                         return -1;
 101                 break;
 102         case I40IW_ARP_DELETE:
 103                 if (arp_index == iwdev->arp_table_size)
 104                         return -1;
 105                 memset(iwdev->arp_table[arp_index].ip_addr, 0,
 106                        sizeof(iwdev->arp_table[arp_index].ip_addr));
 107                 eth_zero_addr(iwdev->arp_table[arp_index].mac_addr);
 108                 i40iw_free_resource(iwdev, iwdev->allocated_arps, arp_index);
 109                 break;
 110         default:
 111                 return -1;
 112         }
 113         return arp_index;
 114 }
 115
 116 /**
 117  * i40iw_wr32 - write 32 bits to hw register
 118  * @hw: hardware information including registers
 119  * @reg: register offset
 120  * @value: vvalue to write to register
 121  */
 122 inline void i40iw_wr32(struct i40iw_hw *hw, u32 reg, u32 value)
 123 {
 124         writel(value, hw->hw_addr + reg);
 125 }
 126
 127 /**
 128  * i40iw_rd32 - read a 32 bit hw register
 129  * @hw: hardware information including registers
 130  * @reg: register offset
 131  *
 132  * Return value of register content
 133  */
 134 inline u32 i40iw_rd32(struct i40iw_hw *hw, u32 reg)
 135 {
 136         return readl(hw->hw_addr + reg);
 137 }
 138
 139 /**
 140  * i40iw_inetaddr_event - system notifier for netdev events
 141  * @notfier: not used
 142  * @event: event for notifier
 143  * @ptr: if address
 144  */
 145 int i40iw_inetaddr_event(struct notifier_block *notifier,
 146                          unsigned long event,
 147                          void *ptr)
 148 {
 149         struct in_ifaddr *ifa = ptr;
 150         struct net_device *event_netdev = ifa->ifa_dev->dev;
 151         struct net_device *netdev;
 152         struct net_device *upper_dev;
 153         struct i40iw_device *iwdev;
 154         struct i40iw_handler *hdl;
 155         __be32 local_ipaddr;
 156
 157         hdl = i40iw_find_netdev(event_netdev);
 158         if (!hdl)
 159                 return NOTIFY_DONE;
 160
 161         iwdev = &hdl->device;
 162         netdev = iwdev->ldev->netdev;
 163         upper_dev = netdev_master_upper_dev_get(netdev);
 164         if (netdev != event_netdev)
 165                 return NOTIFY_DONE;
 166
 167         switch (event) {
 168         case NETDEV_DOWN:
 169                 if (upper_dev)
 170                         local_ipaddr =
 171                                 ((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address;
 172                 else
 173                         local_ipaddr = ifa->ifa_address;
 174                 local_ipaddr = ntohl(local_ipaddr);
 175                 i40iw_manage_arp_cache(iwdev,
 176                                        netdev->dev_addr,
 177                                        &local_ipaddr,
 178                                        true,
 179                                        I40IW_ARP_DELETE);
 180                 return NOTIFY_OK;
 181         case NETDEV_UP:
 182                 if (upper_dev)
 183                         local_ipaddr =
 184                                 ((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address;
 185                 else
 186                         local_ipaddr = ifa->ifa_address;
 187                 local_ipaddr = ntohl(local_ipaddr);
 188                 i40iw_manage_arp_cache(iwdev,
 189                                        netdev->dev_addr,
 190                                        &local_ipaddr,
 191                                        true,
 192                                        I40IW_ARP_ADD);
 193                 break;
 194         case NETDEV_CHANGEADDR:
 195                 /* Add the address to the IP table */
 196                 if (upper_dev)
 197                         local_ipaddr =
 198                                 ((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address;
 199                 else
 200                         local_ipaddr = ifa->ifa_address;
 201
 202                 local_ipaddr = ntohl(local_ipaddr);
 203                 i40iw_manage_arp_cache(iwdev,
 204                                        netdev->dev_addr,
 205                                        &local_ipaddr,
 206                                        true,
 207                                        I40IW_ARP_ADD);
 208                 break;
 209         default:
 210                 break;
 211         }
 212         return NOTIFY_DONE;
 213 }
 214
 215 /**
 216  * i40iw_inet6addr_event - system notifier for ipv6 netdev events
 217  * @notfier: not used
 218  * @event: event for notifier
 219  * @ptr: if address
 220  */
 221 int i40iw_inet6addr_event(struct notifier_block *notifier,
 222                           unsigned long event,
 223                           void *ptr)
 224 {
 225         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 226         struct net_device *event_netdev = ifa->idev->dev;
 227         struct net_device *netdev;
 228         struct i40iw_device *iwdev;
 229         struct i40iw_handler *hdl;
 230         __be32 local_ipaddr6[4];
 231
 232         hdl = i40iw_find_netdev(event_netdev);
 233         if (!hdl)
 234                 return NOTIFY_DONE;
 235
 236         iwdev = &hdl->device;
 237         netdev = iwdev->ldev->netdev;
 238         if (netdev != event_netdev)
 239                 return NOTIFY_DONE;
 240
 241         switch (event) {
 242         case NETDEV_DOWN:
 243                 i40iw_copy_ip_ntohl(local_ipaddr6, ifa->addr.in6_u.u6_addr32);
 244                 i40iw_manage_arp_cache(iwdev,
 245                                        netdev->dev_addr,
 246                                        local_ipaddr6,
 247                                        false,
 248                                        I40IW_ARP_DELETE);
 249                 return NOTIFY_OK;
 250         case NETDEV_UP:
 251                 /* Fall through */
 252         case NETDEV_CHANGEADDR:
 253                 i40iw_copy_ip_ntohl(local_ipaddr6, ifa->addr.in6_u.u6_addr32);
 254                 i40iw_manage_arp_cache(iwdev,
 255                                        netdev->dev_addr,
 256                                        local_ipaddr6,
 257                                        false,
 258                                        I40IW_ARP_ADD);
 259                 break;
 260         default:
 261                 break;
 262         }
 263         return NOTIFY_DONE;
 264 }
 265
 266 /**
 267  * i40iw_net_event - system notifier for net events
 268  * @notfier: not used
 269  * @event: event for notifier
 270  * @ptr: neighbor
 271  */
 272 int i40iw_net_event(struct notifier_block *notifier, unsigned long event, void *ptr)
 273 {
 274         struct neighbour *neigh = ptr;
 275         struct i40iw_device *iwdev;
 276         struct i40iw_handler *iwhdl;
 277         __be32 *p;
 278         u32 local_ipaddr[4];
 279
 280         switch (event) {
 281         case NETEVENT_NEIGH_UPDATE:
 282                 iwhdl = i40iw_find_netdev((struct net_device *)neigh->dev);
 283                 if (!iwhdl)
 284                         return NOTIFY_DONE;
 285                 iwdev = &iwhdl->device;
 286                 p = (__be32 *)neigh->primary_key;
 287                 i40iw_copy_ip_ntohl(local_ipaddr, p);
 288                 if (neigh->nud_state & NUD_VALID) {
 289                         i40iw_manage_arp_cache(iwdev,
 290                                                neigh->ha,
 291                                                local_ipaddr,
 292                                                false,
 293                                                I40IW_ARP_ADD);
 294
 295                 } else {
 296                         i40iw_manage_arp_cache(iwdev,
 297                                                neigh->ha,
 298                                                local_ipaddr,
 299                                                false,
 300                                                I40IW_ARP_DELETE);
 301                 }
 302                 break;
 303         default:
 304                 break;
 305         }
 306         return NOTIFY_DONE;
 307 }
 308
 309 /**
 310  * i40iw_get_cqp_request - get cqp struct
 311  * @cqp: device cqp ptr
 312  * @wait: cqp to be used in wait mode
 313  */
 314 struct i40iw_cqp_request *i40iw_get_cqp_request(struct i40iw_cqp *cqp, bool wait)
 315 {
 316         struct i40iw_cqp_request *cqp_request = NULL;
 317         unsigned long flags;
 318
 319         spin_lock_irqsave(&cqp->req_lock, flags);
 320         if (!list_empty(&cqp->cqp_avail_reqs)) {
 321                 cqp_request = list_entry(cqp->cqp_avail_reqs.next,
 322                                          struct i40iw_cqp_request, list);
 323                 list_del_init(&cqp_request->list);
 324         }
 325         spin_unlock_irqrestore(&cqp->req_lock, flags);
 326         if (!cqp_request) {
 327                 cqp_request = kzalloc(sizeof(*cqp_request), GFP_ATOMIC);
 328                 if (cqp_request) {
 329                         cqp_request->dynamic = true;
 330                         INIT_LIST_HEAD(&cqp_request->list);
 331                         init_waitqueue_head(&cqp_request->waitq);
 332                 }
 333         }
 334         if (!cqp_request) {
 335                 i40iw_pr_err("CQP Request Fail: No Memory");
 336                 return NULL;
 337         }
 338
 339         if (wait) {
 340                 atomic_set(&cqp_request->refcount, 2);
 341                 cqp_request->waiting = true;
 342         } else {
 343                 atomic_set(&cqp_request->refcount, 1);
 344         }
 345         return cqp_request;
 346 }
 347
 348 /**
 349  * i40iw_free_cqp_request - free cqp request
 350  * @cqp: cqp ptr
 351  * @cqp_request: to be put back in cqp list
 352  */
 353 void i40iw_free_cqp_request(struct i40iw_cqp *cqp, struct i40iw_cqp_request *cqp_request)
 354 {
 355         unsigned long flags;
 356
 357         if (cqp_request->dynamic) {
 358                 kfree(cqp_request);
 359         } else {
 360                 cqp_request->request_done = false;
 361                 cqp_request->callback_fcn = NULL;
 362                 cqp_request->waiting = false;
 363
 364                 spin_lock_irqsave(&cqp->req_lock, flags);
 365                 list_add_tail(&cqp_request->list, &cqp->cqp_avail_reqs);
 366                 spin_unlock_irqrestore(&cqp->req_lock, flags);
 367         }
 368 }
 369
 370 /**
 371  * i40iw_put_cqp_request - dec ref count and free if 0
 372  * @cqp: cqp ptr
 373  * @cqp_request: to be put back in cqp list
 374  */
 375 void i40iw_put_cqp_request(struct i40iw_cqp *cqp,
 376                            struct i40iw_cqp_request *cqp_request)
 377 {
 378         if (atomic_dec_and_test(&cqp_request->refcount))
 379                 i40iw_free_cqp_request(cqp, cqp_request);
 380 }
 381
 382 /**
 383  * i40iw_free_qp - callback after destroy cqp completes
 384  * @cqp_request: cqp request for destroy qp
 385  * @num: not used
 386  */
 387 static void i40iw_free_qp(struct i40iw_cqp_request *cqp_request, u32 num)
 388 {
 389         struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)cqp_request->param;
 390         struct i40iw_qp *iwqp = (struct i40iw_qp *)qp->back_qp;
 391         struct i40iw_device *iwdev;
 392         u32 qp_num = iwqp->ibqp.qp_num;
 393
 394         iwdev = iwqp->iwdev;
 395
 396         i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
 397         i40iw_free_qp_resources(iwdev, iwqp, qp_num);
 398 }
 399
 400 /**
 401  * i40iw_wait_event - wait for completion
 402  * @iwdev: iwarp device
 403  * @cqp_request: cqp request to wait
 404  */
 405 static int i40iw_wait_event(struct i40iw_device *iwdev,
 406                             struct i40iw_cqp_request *cqp_request)
 407 {
 408         struct cqp_commands_info *info = &cqp_request->info;
 409         struct i40iw_cqp *iwcqp = &iwdev->cqp;
 410         bool cqp_error = false;
 411         int err_code = 0;
 412         int timeout_ret = 0;
 413
 414         timeout_ret = wait_event_timeout(cqp_request->waitq,
 415                                          cqp_request->request_done,
 416                                          I40IW_EVENT_TIMEOUT);
 417         if (!timeout_ret) {
 418                 i40iw_pr_err("error cqp command 0x%x timed out ret = %d\n",
 419                              info->cqp_cmd, timeout_ret);
 420                 err_code = -ETIME;
 421                 i40iw_request_reset(iwdev);
 422                 goto done;
 423         }
 424         cqp_error = cqp_request->compl_info.error;
 425         if (cqp_error) {
 426                 i40iw_pr_err("error cqp command 0x%x completion maj = 0x%x min=0x%x\n",
 427                              info->cqp_cmd, cqp_request->compl_info.maj_err_code,
 428                              cqp_request->compl_info.min_err_code);
 429                 err_code = -EPROTO;
 430                 goto done;
 431         }
 432 done:
 433         i40iw_put_cqp_request(iwcqp, cqp_request);
 434         return err_code;
 435 }
 436
 437 /**
 438  * i40iw_handle_cqp_op - process cqp command
 439  * @iwdev: iwarp device
 440  * @cqp_request: cqp request to process
 441  */
 442 enum i40iw_status_code i40iw_handle_cqp_op(struct i40iw_device *iwdev,
 443                                            struct i40iw_cqp_request
 444                                            *cqp_request)
 445 {
 446         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 447         enum i40iw_status_code status;
 448         struct cqp_commands_info *info = &cqp_request->info;
 449         int err_code = 0;
 450
 451         status = i40iw_process_cqp_cmd(dev, info);
 452         if (status) {
 453                 i40iw_pr_err("error cqp command 0x%x failed\n", info->cqp_cmd);
 454                 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
 455                 return status;
 456         }
 457         if (cqp_request->waiting)
 458                 err_code = i40iw_wait_event(iwdev, cqp_request);
 459         if (err_code)
 460                 status = I40IW_ERR_CQP_COMPL_ERROR;
 461         return status;
 462 }
 463
 464 /**
 465  * i40iw_add_pdusecount - add pd refcount
 466  * @iwpd: pd for refcount
 467  */
 468 void i40iw_add_pdusecount(struct i40iw_pd *iwpd)
 469 {
 470         atomic_inc(&iwpd->usecount);
 471 }
 472
 473 /**
 474  * i40iw_rem_pdusecount - decrement refcount for pd and free if 0
 475  * @iwpd: pd for refcount
 476  * @iwdev: iwarp device
 477  */
 478 void i40iw_rem_pdusecount(struct i40iw_pd *iwpd, struct i40iw_device *iwdev)
 479 {
 480         if (!atomic_dec_and_test(&iwpd->usecount))
 481                 return;
 482         i40iw_free_resource(iwdev, iwdev->allocated_pds, iwpd->sc_pd.pd_id);
 483         kfree(iwpd);
 484 }
 485
 486 /**
 487  * i40iw_add_ref - add refcount for qp
 488  * @ibqp: iqarp qp
 489  */
 490 void i40iw_add_ref(struct ib_qp *ibqp)
 491 {
 492         struct i40iw_qp *iwqp = (struct i40iw_qp *)ibqp;
 493
 494         atomic_inc(&iwqp->refcount);
 495 }
 496
 497 /**
 498  * i40iw_rem_ref - rem refcount for qp and free if 0
 499  * @ibqp: iqarp qp
 500  */
 501 void i40iw_rem_ref(struct ib_qp *ibqp)
 502 {
 503         struct i40iw_qp *iwqp;
 504         enum i40iw_status_code status;
 505         struct i40iw_cqp_request *cqp_request;
 506         struct cqp_commands_info *cqp_info;
 507         struct i40iw_device *iwdev;
 508         u32 qp_num;
 509
 510         iwqp = to_iwqp(ibqp);
 511         if (!atomic_dec_and_test(&iwqp->refcount))
 512                 return;
 513
 514         iwdev = iwqp->iwdev;
 515         qp_num = iwqp->ibqp.qp_num;
 516         iwdev->qp_table[qp_num] = NULL;
 517         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 518         if (!cqp_request)
 519                 return;
 520
 521         cqp_request->callback_fcn = i40iw_free_qp;
 522         cqp_request->param = (void *)&iwqp->sc_qp;
 523         cqp_info = &cqp_request->info;
 524         cqp_info->cqp_cmd = OP_QP_DESTROY;
 525         cqp_info->post_sq = 1;
 526         cqp_info->in.u.qp_destroy.qp = &iwqp->sc_qp;
 527         cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
 528         cqp_info->in.u.qp_destroy.remove_hash_idx = true;
 529         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 530         if (status)
 531                 i40iw_pr_err("CQP-OP Destroy QP fail");
 532 }
 533
 534 /**
 535  * i40iw_get_qp - get qp address
 536  * @device: iwarp device
 537  * @qpn: qp number
 538  */
 539 struct ib_qp *i40iw_get_qp(struct ib_device *device, int qpn)
 540 {
 541         struct i40iw_device *iwdev = to_iwdev(device);
 542
 543         if ((qpn < IW_FIRST_QPN) || (qpn >= iwdev->max_qp))
 544                 return NULL;
 545
 546         return &iwdev->qp_table[qpn]->ibqp;
 547 }
 548
 549 /**
 550  * i40iw_debug_buf - print debug msg and buffer is mask set
 551  * @dev: hardware control device structure
 552  * @mask: mask to compare if to print debug buffer
 553  * @buf: points buffer addr
 554  * @size: saize of buffer to print
 555  */
 556 void i40iw_debug_buf(struct i40iw_sc_dev *dev,
 557                      enum i40iw_debug_flag mask,
 558                      char *desc,
 559                      u64 *buf,
 560                      u32 size)
 561 {
 562         u32 i;
 563
 564         if (!(dev->debug_mask & mask))
 565                 return;
 566         i40iw_debug(dev, mask, "%s\n", desc);
 567         i40iw_debug(dev, mask, "starting address virt=%p phy=%llxh\n", buf,
 568                     (unsigned long long)virt_to_phys(buf));
 569
 570         for (i = 0; i < size; i += 8)
 571                 i40iw_debug(dev, mask, "index %03d val: %016llx\n", i, buf[i / 8]);
 572 }
 573
 574 /**
 575  * i40iw_get_hw_addr - return hw addr
 576  * @par: points to shared dev
 577  */
 578 u8 __iomem *i40iw_get_hw_addr(void *par)
 579 {
 580         struct i40iw_sc_dev *dev = (struct i40iw_sc_dev *)par;
 581
 582         return dev->hw->hw_addr;
 583 }
 584
 585 /**
 586  * i40iw_remove_head - return head entry and remove from list
 587  * @list: list for entry
 588  */
 589 void *i40iw_remove_head(struct list_head *list)
 590 {
 591         struct list_head *entry;
 592
 593         if (list_empty(list))
 594                 return NULL;
 595
 596         entry = (void *)list->next;
 597         list_del(entry);
 598         return (void *)entry;
 599 }
 600
 601 /**
 602  * i40iw_allocate_dma_mem - Memory alloc helper fn
 603  * @hw:   pointer to the HW structure
 604  * @mem:  ptr to mem struct to fill out
 605  * @size: size of memory requested
 606  * @alignment: what to align the allocation to
 607  */
 608 enum i40iw_status_code i40iw_allocate_dma_mem(struct i40iw_hw *hw,
 609                                               struct i40iw_dma_mem *mem,
 610                                               u64 size,
 611                                               u32 alignment)
 612 {
 613         struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 614
 615         if (!mem)
 616                 return I40IW_ERR_PARAM;
 617         mem->size = ALIGN(size, alignment);
 618         mem->va = dma_zalloc_coherent(&pcidev->dev, mem->size,
 619                                       (dma_addr_t *)&mem->pa, GFP_KERNEL);
 620         if (!mem->va)
 621                 return I40IW_ERR_NO_MEMORY;
 622         return 0;
 623 }
 624
 625 /**
 626  * i40iw_free_dma_mem - Memory free helper fn
 627  * @hw:   pointer to the HW structure
 628  * @mem:  ptr to mem struct to free
 629  */
 630 void i40iw_free_dma_mem(struct i40iw_hw *hw, struct i40iw_dma_mem *mem)
 631 {
 632         struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 633
 634         if (!mem || !mem->va)
 635                 return;
 636
 637         dma_free_coherent(&pcidev->dev, mem->size,
 638                           mem->va, (dma_addr_t)mem->pa);
 639         mem->va = NULL;
 640 }
 641
 642 /**
 643  * i40iw_allocate_virt_mem - virtual memory alloc helper fn
 644  * @hw:   pointer to the HW structure
 645  * @mem:  ptr to mem struct to fill out
 646  * @size: size of memory requested
 647  */
 648 enum i40iw_status_code i40iw_allocate_virt_mem(struct i40iw_hw *hw,
 649                                                struct i40iw_virt_mem *mem,
 650                                                u32 size)
 651 {
 652         if (!mem)
 653                 return I40IW_ERR_PARAM;
 654
 655         mem->size = size;
 656         mem->va = kzalloc(size, GFP_KERNEL);
 657
 658         if (mem->va)
 659                 return 0;
 660         else
 661                 return I40IW_ERR_NO_MEMORY;
 662 }
 663
 664 /**
 665  * i40iw_free_virt_mem - virtual memory free helper fn
 666  * @hw:   pointer to the HW structure
 667  * @mem:  ptr to mem struct to free
 668  */
 669 enum i40iw_status_code i40iw_free_virt_mem(struct i40iw_hw *hw,
 670                                            struct i40iw_virt_mem *mem)
 671 {
 672         if (!mem)
 673                 return I40IW_ERR_PARAM;
 674         kfree(mem->va);
 675         mem->va = NULL;
 676         return 0;
 677 }
 678
 679 /**
 680  * i40iw_cqp_sds_cmd - create cqp command for sd
 681  * @dev: hardware control device structure
 682  * @sd_info: information  for sd cqp
 683  *
 684  */
 685 enum i40iw_status_code i40iw_cqp_sds_cmd(struct i40iw_sc_dev *dev,
 686                                          struct i40iw_update_sds_info *sdinfo)
 687 {
 688         enum i40iw_status_code status;
 689         struct i40iw_cqp_request *cqp_request;
 690         struct cqp_commands_info *cqp_info;
 691         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 692
 693         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 694         if (!cqp_request)
 695                 return I40IW_ERR_NO_MEMORY;
 696         cqp_info = &cqp_request->info;
 697         memcpy(&cqp_info->in.u.update_pe_sds.info, sdinfo,
 698                sizeof(cqp_info->in.u.update_pe_sds.info));
 699         cqp_info->cqp_cmd = OP_UPDATE_PE_SDS;
 700         cqp_info->post_sq = 1;
 701         cqp_info->in.u.update_pe_sds.dev = dev;
 702         cqp_info->in.u.update_pe_sds.scratch = (uintptr_t)cqp_request;
 703         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 704         if (status)
 705                 i40iw_pr_err("CQP-OP Update SD's fail");
 706         return status;
 707 }
 708
 709 /**
 710  * i40iw_term_modify_qp - modify qp for term message
 711  * @qp: hardware control qp
 712  * @next_state: qp's next state
 713  * @term: terminate code
 714  * @term_len: length
 715  */
 716 void i40iw_term_modify_qp(struct i40iw_sc_qp *qp, u8 next_state, u8 term, u8 term_len)
 717 {
 718         struct i40iw_qp *iwqp;
 719
 720         iwqp = (struct i40iw_qp *)qp->back_qp;
 721         i40iw_next_iw_state(iwqp, next_state, 0, term, term_len);
 722 };
 723
 724 /**
 725  * i40iw_terminate_done - after terminate is completed
 726  * @qp: hardware control qp
 727  * @timeout_occurred: indicates if terminate timer expired
 728  */
 729 void i40iw_terminate_done(struct i40iw_sc_qp *qp, int timeout_occurred)
 730 {
 731         struct i40iw_qp *iwqp;
 732         u32 next_iwarp_state = I40IW_QP_STATE_ERROR;
 733         u8 hte = 0;
 734         bool first_time;
 735         unsigned long flags;
 736
 737         iwqp = (struct i40iw_qp *)qp->back_qp;
 738         spin_lock_irqsave(&iwqp->lock, flags);
 739         if (iwqp->hte_added) {
 740                 iwqp->hte_added = 0;
 741                 hte = 1;
 742         }
 743         first_time = !(qp->term_flags & I40IW_TERM_DONE);
 744         qp->term_flags |= I40IW_TERM_DONE;
 745         spin_unlock_irqrestore(&iwqp->lock, flags);
 746         if (first_time) {
 747                 if (!timeout_occurred)
 748                         i40iw_terminate_del_timer(qp);
 749                 else
 750                         next_iwarp_state = I40IW_QP_STATE_CLOSING;
 751
 752                 i40iw_next_iw_state(iwqp, next_iwarp_state, hte, 0, 0);
 753                 i40iw_cm_disconn(iwqp);
 754         }
 755 }
 756
 757 /**
 758  * i40iw_terminate_imeout - timeout happened
 759  * @context: points to iwarp qp
 760  */
 761 static void i40iw_terminate_timeout(unsigned long context)
 762 {
 763         struct i40iw_qp *iwqp = (struct i40iw_qp *)context;
 764         struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)&iwqp->sc_qp;
 765
 766         i40iw_terminate_done(qp, 1);
 767 }
 768
 769 /**
 770  * i40iw_terminate_start_timer - start terminate timeout
 771  * @qp: hardware control qp
 772  */
 773 void i40iw_terminate_start_timer(struct i40iw_sc_qp *qp)
 774 {
 775         struct i40iw_qp *iwqp;
 776
 777         iwqp = (struct i40iw_qp *)qp->back_qp;
 778         init_timer(&iwqp->terminate_timer);
 779         iwqp->terminate_timer.function = i40iw_terminate_timeout;
 780         iwqp->terminate_timer.expires = jiffies + HZ;
 781         iwqp->terminate_timer.data = (unsigned long)iwqp;
 782         add_timer(&iwqp->terminate_timer);
 783 }
 784
 785 /**
 786  * i40iw_terminate_del_timer - delete terminate timeout
 787  * @qp: hardware control qp
 788  */
 789 void i40iw_terminate_del_timer(struct i40iw_sc_qp *qp)
 790 {
 791         struct i40iw_qp *iwqp;
 792
 793         iwqp = (struct i40iw_qp *)qp->back_qp;
 794         del_timer(&iwqp->terminate_timer);
 795 }
 796
 797 /**
 798  * i40iw_cqp_generic_worker - generic worker for cqp
 799  * @work: work pointer
 800  */
 801 static void i40iw_cqp_generic_worker(struct work_struct *work)
 802 {
 803         struct i40iw_virtchnl_work_info *work_info =
 804             &((struct virtchnl_work *)work)->work_info;
 805
 806         if (work_info->worker_vf_dev)
 807                 work_info->callback_fcn(work_info->worker_vf_dev);
 808 }
 809
 810 /**
 811  * i40iw_cqp_spawn_worker - spawn worket thread
 812  * @iwdev: device struct pointer
 813  * @work_info: work request info
 814  * @iw_vf_idx: virtual function index
 815  */
 816 void i40iw_cqp_spawn_worker(struct i40iw_sc_dev *dev,
 817                             struct i40iw_virtchnl_work_info *work_info,
 818                             u32 iw_vf_idx)
 819 {
 820         struct virtchnl_work *work;
 821         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 822
 823         work = &iwdev->virtchnl_w[iw_vf_idx];
 824         memcpy(&work->work_info, work_info, sizeof(*work_info));
 825         INIT_WORK(&work->work, i40iw_cqp_generic_worker);
 826         queue_work(iwdev->virtchnl_wq, &work->work);
 827 }
 828
 829 /**
 830  * i40iw_cqp_manage_hmc_fcn_worker -
 831  * @work: work pointer for hmc info
 832  */
 833 static void i40iw_cqp_manage_hmc_fcn_worker(struct work_struct *work)
 834 {
 835         struct i40iw_cqp_request *cqp_request =
 836             ((struct virtchnl_work *)work)->cqp_request;
 837         struct i40iw_ccq_cqe_info ccq_cqe_info;
 838         struct i40iw_hmc_fcn_info *hmcfcninfo =
 839                         &cqp_request->info.in.u.manage_hmc_pm.info;
 840         struct i40iw_device *iwdev =
 841             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->back_dev;
 842
 843         ccq_cqe_info.cqp = NULL;
 844         ccq_cqe_info.maj_err_code = cqp_request->compl_info.maj_err_code;
 845         ccq_cqe_info.min_err_code = cqp_request->compl_info.min_err_code;
 846         ccq_cqe_info.op_code = cqp_request->compl_info.op_code;
 847         ccq_cqe_info.op_ret_val = cqp_request->compl_info.op_ret_val;
 848         ccq_cqe_info.scratch = 0;
 849         ccq_cqe_info.error = cqp_request->compl_info.error;
 850         hmcfcninfo->callback_fcn(cqp_request->info.in.u.manage_hmc_pm.dev,
 851                                  hmcfcninfo->cqp_callback_param, &ccq_cqe_info);
 852         i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
 853 }
 854
 855 /**
 856  * i40iw_cqp_manage_hmc_fcn_callback - called function after cqp completion
 857  * @cqp_request: cqp request info struct for hmc fun
 858  * @unused: unused param of callback
 859  */
 860 static void i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request *cqp_request,
 861                                               u32 unused)
 862 {
 863         struct virtchnl_work *work;
 864         struct i40iw_hmc_fcn_info *hmcfcninfo =
 865             &cqp_request->info.in.u.manage_hmc_pm.info;
 866         struct i40iw_device *iwdev =
 867             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->
 868             back_dev;
 869
 870         if (hmcfcninfo && hmcfcninfo->callback_fcn) {
 871                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s1\n", __func__);
 872                 atomic_inc(&cqp_request->refcount);
 873                 work = &iwdev->virtchnl_w[hmcfcninfo->iw_vf_idx];
 874                 work->cqp_request = cqp_request;
 875                 INIT_WORK(&work->work, i40iw_cqp_manage_hmc_fcn_worker);
 876                 queue_work(iwdev->virtchnl_wq, &work->work);
 877                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s2\n", __func__);
 878         } else {
 879                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s: Something wrong\n", __func__);
 880         }
 881 }
 882
 883 /**
 884  * i40iw_cqp_manage_hmc_fcn_cmd - issue cqp command to manage hmc
 885  * @dev: hardware control device structure
 886  * @hmcfcninfo: info for hmc
 887  */
 888 enum i40iw_status_code i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev *dev,
 889                                                     struct i40iw_hmc_fcn_info *hmcfcninfo)
 890 {
 891         enum i40iw_status_code status;
 892         struct i40iw_cqp_request *cqp_request;
 893         struct cqp_commands_info *cqp_info;
 894         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 895
 896         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s\n", __func__);
 897         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 898         if (!cqp_request)
 899                 return I40IW_ERR_NO_MEMORY;
 900         cqp_info = &cqp_request->info;
 901         cqp_request->callback_fcn = i40iw_cqp_manage_hmc_fcn_callback;
 902         cqp_request->param = hmcfcninfo;
 903         memcpy(&cqp_info->in.u.manage_hmc_pm.info, hmcfcninfo,
 904                sizeof(*hmcfcninfo));
 905         cqp_info->in.u.manage_hmc_pm.dev = dev;
 906         cqp_info->cqp_cmd = OP_MANAGE_HMC_PM_FUNC_TABLE;
 907         cqp_info->post_sq = 1;
 908         cqp_info->in.u.manage_hmc_pm.scratch = (uintptr_t)cqp_request;
 909         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 910         if (status)
 911                 i40iw_pr_err("CQP-OP Manage HMC fail");
 912         return status;
 913 }
 914
 915 /**
 916  * i40iw_cqp_query_fpm_values_cmd - send cqp command for fpm
 917  * @iwdev: function device struct
 918  * @values_mem: buffer for fpm
 919  * @hmc_fn_id: function id for fpm
 920  */
 921 enum i40iw_status_code i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev *dev,
 922                                                       struct i40iw_dma_mem *values_mem,
 923                                                       u8 hmc_fn_id)
 924 {
 925         enum i40iw_status_code status;
 926         struct i40iw_cqp_request *cqp_request;
 927         struct cqp_commands_info *cqp_info;
 928         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 929
 930         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 931         if (!cqp_request)
 932                 return I40IW_ERR_NO_MEMORY;
 933         cqp_info = &cqp_request->info;
 934         cqp_request->param = NULL;
 935         cqp_info->in.u.query_fpm_values.cqp = dev->cqp;
 936         cqp_info->in.u.query_fpm_values.fpm_values_pa = values_mem->pa;
 937         cqp_info->in.u.query_fpm_values.fpm_values_va = values_mem->va;
 938         cqp_info->in.u.query_fpm_values.hmc_fn_id = hmc_fn_id;
 939         cqp_info->cqp_cmd = OP_QUERY_FPM_VALUES;
 940         cqp_info->post_sq = 1;
 941         cqp_info->in.u.query_fpm_values.scratch = (uintptr_t)cqp_request;
 942         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 943         if (status)
 944                 i40iw_pr_err("CQP-OP Query FPM fail");
 945         return status;
 946 }
 947
 948 /**
 949  * i40iw_cqp_commit_fpm_values_cmd - commit fpm values in hw
 950  * @dev: hardware control device structure
 951  * @values_mem: buffer with fpm values
 952  * @hmc_fn_id: function id for fpm
 953  */
 954 enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
 955                                                        struct i40iw_dma_mem *values_mem,
 956                                                        u8 hmc_fn_id)
 957 {
 958         enum i40iw_status_code status;
 959         struct i40iw_cqp_request *cqp_request;
 960         struct cqp_commands_info *cqp_info;
 961         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 962
 963         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 964         if (!cqp_request)
 965                 return I40IW_ERR_NO_MEMORY;
 966         cqp_info = &cqp_request->info;
 967         cqp_request->param = NULL;
 968         cqp_info->in.u.commit_fpm_values.cqp = dev->cqp;
 969         cqp_info->in.u.commit_fpm_values.fpm_values_pa = values_mem->pa;
 970         cqp_info->in.u.commit_fpm_values.fpm_values_va = values_mem->va;
 971         cqp_info->in.u.commit_fpm_values.hmc_fn_id = hmc_fn_id;
 972         cqp_info->cqp_cmd = OP_COMMIT_FPM_VALUES;
 973         cqp_info->post_sq = 1;
 974         cqp_info->in.u.commit_fpm_values.scratch = (uintptr_t)cqp_request;
 975         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 976         if (status)
 977                 i40iw_pr_err("CQP-OP Commit FPM fail");
 978         return status;
 979 }
 980
 981 /**
 982  * i40iw_vf_wait_vchnl_resp - wait for channel msg
 983  * @iwdev: function's device struct
 984  */
 985 enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
 986 {
 987         struct i40iw_device *iwdev = dev->back_dev;
 988         enum i40iw_status_code err_code = 0;
 989         int timeout_ret;
 990
 991         i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
 992                     __func__, __LINE__, dev, iwdev);
 993         atomic_add(2, &iwdev->vchnl_msgs);
 994         timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
 995                                          (atomic_read(&iwdev->vchnl_msgs) == 1),
 996                                          I40IW_VCHNL_EVENT_TIMEOUT);
 997         atomic_dec(&iwdev->vchnl_msgs);
 998         if (!timeout_ret) {
 999                 i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
1000                 err_code = I40IW_ERR_TIMEOUT;
1001         }
1002         return err_code;
1003 }
1004
1005 /**
1006  * i40iw_ieq_mpa_crc_ae - generate AE for crc error
1007  * @dev: hardware control device structure
1008  * @qp: hardware control qp
1009  */
1010 void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1011 {
1012         struct i40iw_qp_flush_info info;
1013         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1014
1015         i40iw_debug(dev, I40IW_DEBUG_AEQ, "%s entered\n", __func__);
1016         memset(&info, 0, sizeof(info));
1017         info.ae_code = I40IW_AE_LLP_RECEIVED_MPA_CRC_ERROR;
1018         info.generate_ae = true;
1019         info.ae_source = 0x3;
1020         (void)i40iw_hw_flush_wqes(iwdev, qp, &info, false);
1021 }
1022
1023 /**
1024  * i40iw_init_hash_desc - initialize hash for crc calculation
1025  * @desc: cryption type
1026  */
1027 enum i40iw_status_code i40iw_init_hash_desc(struct hash_desc *desc)
1028 {
1029         desc->tfm = crypto_alloc_hash("crc32c", 0, CRYPTO_ALG_ASYNC);
1030         if (IS_ERR(desc->tfm))
1031                 return I40IW_ERR_MPA_CRC;
1032         return 0;
1033 }
1034
1035 /**
1036  * i40iw_free_hash_desc - free hash desc
1037  * @desc: to be freed
1038  */
1039 void i40iw_free_hash_desc(struct hash_desc *desc)
1040 {
1041         crypto_free_hash(desc->tfm);
1042 }
1043
1044 /**
1045  * i40iw_alloc_query_fpm_buf - allocate buffer for fpm
1046  * @dev: hardware control device structure
1047  * @mem: buffer ptr for fpm to be allocated
1048  * @return: memory allocation status
1049  */
1050 enum i40iw_status_code i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev *dev,
1051                                                  struct i40iw_dma_mem *mem)
1052 {
1053         enum i40iw_status_code status;
1054         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1055
1056         status = i40iw_obj_aligned_mem(iwdev, mem, I40IW_QUERY_FPM_BUF_SIZE,
1057                                        I40IW_FPM_QUERY_BUF_ALIGNMENT_MASK);
1058         return status;
1059 }
1060
1061 /**
1062  * i40iw_ieq_check_mpacrc - check if mpa crc is OK
1063  * @desc: desc for hash
1064  * @addr: address of buffer for crc
1065  * @length: length of buffer
1066  * @value: value to be compared
1067  */
1068 enum i40iw_status_code i40iw_ieq_check_mpacrc(struct hash_desc *desc,
1069                                               void *addr,
1070                                               u32 length,
1071                                               u32 value)
1072 {
1073         struct scatterlist sg;
1074         u32 crc = 0;
1075         int ret;
1076         enum i40iw_status_code ret_code = 0;
1077
1078         crypto_hash_init(desc);
1079         sg_init_one(&sg, addr, length);
1080         ret = crypto_hash_update(desc, &sg, length);
1081         if (!ret)
1082                 crypto_hash_final(desc, (u8 *)&crc);
1083         if (crc != value) {
1084                 i40iw_pr_err("mpa crc check fail\n");
1085                 ret_code = I40IW_ERR_MPA_CRC;
1086         }
1087         return ret_code;
1088 }
1089
1090 /**
1091  * i40iw_ieq_get_qp - get qp based on quad in puda buffer
1092  * @dev: hardware control device structure
1093  * @buf: receive puda buffer on exception q
1094  */
1095 struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev,
1096                                      struct i40iw_puda_buf *buf)
1097 {
1098         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1099         struct i40iw_qp *iwqp;
1100         struct i40iw_cm_node *cm_node;
1101         u32 loc_addr[4], rem_addr[4];
1102         u16 loc_port, rem_port;
1103         struct ipv6hdr *ip6h;
1104         struct iphdr *iph = (struct iphdr *)buf->iph;
1105         struct tcphdr *tcph = (struct tcphdr *)buf->tcph;
1106
1107         if (iph->version == 4) {
1108                 memset(loc_addr, 0, sizeof(loc_addr));
1109                 loc_addr[0] = ntohl(iph->daddr);
1110                 memset(rem_addr, 0, sizeof(rem_addr));
1111                 rem_addr[0] = ntohl(iph->saddr);
1112         } else {
1113                 ip6h = (struct ipv6hdr *)buf->iph;
1114                 i40iw_copy_ip_ntohl(loc_addr, ip6h->daddr.in6_u.u6_addr32);
1115                 i40iw_copy_ip_ntohl(rem_addr, ip6h->saddr.in6_u.u6_addr32);
1116         }
1117         loc_port = ntohs(tcph->dest);
1118         rem_port = ntohs(tcph->source);
1119
1120         cm_node = i40iw_find_node(&iwdev->cm_core, rem_port, rem_addr, loc_port,
1121                                   loc_addr, false);
1122         if (!cm_node)
1123                 return NULL;
1124         iwqp = cm_node->iwqp;
1125         return &iwqp->sc_qp;
1126 }
1127
1128 /**
1129  * i40iw_ieq_update_tcpip_info - update tcpip in the buffer
1130  * @buf: puda to update
1131  * @length: length of buffer
1132  * @seqnum: seq number for tcp
1133  */
1134 void i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf *buf, u16 length, u32 seqnum)
1135 {
1136         struct tcphdr *tcph;
1137         struct iphdr *iph;
1138         u16 iphlen;
1139         u16 packetsize;
1140         u8 *addr = (u8 *)buf->mem.va;
1141
1142         iphlen = (buf->ipv4) ? 20 : 40;
1143         iph = (struct iphdr *)(addr + buf->maclen);
1144         tcph = (struct tcphdr *)(addr + buf->maclen + iphlen);
1145         packetsize = length + buf->tcphlen + iphlen;
1146
1147         iph->tot_len = htons(packetsize);
1148         tcph->seq = htonl(seqnum);
1149 }
1150
1151 /**
1152  * i40iw_puda_get_tcpip_info - get tcpip info from puda buffer
1153  * @info: to get information
1154  * @buf: puda buffer
1155  */
1156 enum i40iw_status_code i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info *info,
1157                                                  struct i40iw_puda_buf *buf)
1158 {
1159         struct iphdr *iph;
1160         struct ipv6hdr *ip6h;
1161         struct tcphdr *tcph;
1162         u16 iphlen;
1163         u16 pkt_len;
1164         u8 *mem = (u8 *)buf->mem.va;
1165         struct ethhdr *ethh = (struct ethhdr *)buf->mem.va;
1166
1167         if (ethh->h_proto == htons(0x8100)) {
1168                 info->vlan_valid = true;
1169                 buf->vlan_id = ntohs(((struct vlan_ethhdr *)ethh)->h_vlan_TCI) & VLAN_VID_MASK;
1170         }
1171         buf->maclen = (info->vlan_valid) ? 18 : 14;
1172         iphlen = (info->l3proto) ? 40 : 20;
1173         buf->ipv4 = (info->l3proto) ? false : true;
1174         buf->iph = mem + buf->maclen;
1175         iph = (struct iphdr *)buf->iph;
1176
1177         buf->tcph = buf->iph + iphlen;
1178         tcph = (struct tcphdr *)buf->tcph;
1179
1180         if (buf->ipv4) {
1181                 pkt_len = ntohs(iph->tot_len);
1182         } else {
1183                 ip6h = (struct ipv6hdr *)buf->iph;
1184                 pkt_len = ntohs(ip6h->payload_len) + iphlen;
1185         }
1186
1187         buf->totallen = pkt_len + buf->maclen;
1188
1189         if (info->payload_len < buf->totallen - 4) {
1190                 i40iw_pr_err("payload_len = 0x%x totallen expected0x%x\n",
1191                              info->payload_len, buf->totallen);
1192                 return I40IW_ERR_INVALID_SIZE;
1193         }
1194
1195         buf->tcphlen = (tcph->doff) << 2;
1196         buf->datalen = pkt_len - iphlen - buf->tcphlen;
1197         buf->data = (buf->datalen) ? buf->tcph + buf->tcphlen : NULL;
1198         buf->hdrlen = buf->maclen + iphlen + buf->tcphlen;
1199         buf->seqnum = ntohl(tcph->seq);
1200         return 0;
1201 }
1202
1203 /**
1204  * i40iw_hw_stats_timeout - Stats timer-handler which updates all HW stats
1205  * @dev: hardware control device structure
1206  */
1207 static void i40iw_hw_stats_timeout(unsigned long dev)
1208 {
1209         struct i40iw_sc_dev *pf_dev = (struct i40iw_sc_dev *)dev;
1210         struct i40iw_dev_pestat *pf_devstat = &pf_dev->dev_pestat;
1211         struct i40iw_dev_pestat *vf_devstat = NULL;
1212         u16 iw_vf_idx;
1213         unsigned long flags;
1214
1215         /*PF*/
1216         pf_devstat->ops.iw_hw_stat_read_all(pf_devstat, &pf_devstat->hw_stats);
1217         for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
1218                 spin_lock_irqsave(&pf_devstat->stats_lock, flags);
1219                 if (pf_dev->vf_dev[iw_vf_idx]) {
1220                         if (pf_dev->vf_dev[iw_vf_idx]->stats_initialized) {
1221                                 vf_devstat = &pf_dev->vf_dev[iw_vf_idx]->dev_pestat;
1222                                 vf_devstat->ops.iw_hw_stat_read_all(vf_devstat, &vf_devstat->hw_stats);
1223                         }
1224                 }
1225                 spin_unlock_irqrestore(&pf_devstat->stats_lock, flags);
1226         }
1227
1228         mod_timer(&pf_devstat->stats_timer,
1229                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1230 }
1231
1232 /**
1233  * i40iw_hw_stats_start_timer - Start periodic stats timer
1234  * @dev: hardware control device structure
1235  */
1236 void i40iw_hw_stats_start_timer(struct i40iw_sc_dev *dev)
1237 {
1238         struct i40iw_dev_pestat *devstat = &dev->dev_pestat;
1239
1240         init_timer(&devstat->stats_timer);
1241         devstat->stats_timer.function = i40iw_hw_stats_timeout;
1242         devstat->stats_timer.data = (unsigned long)dev;
1243         mod_timer(&devstat->stats_timer,
1244                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1245 }
1246
1247 /**
1248  * i40iw_hw_stats_del_timer - Delete periodic stats timer
1249  * @dev: hardware control device structure
1250  */
1251 void i40iw_hw_stats_del_timer(struct i40iw_sc_dev *dev)
1252 {
1253         struct i40iw_dev_pestat *devstat = &dev->dev_pestat;
1254
1255         del_timer_sync(&devstat->stats_timer);
1256 }