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                     u32 *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         u32 local_ipaddr;
 156
 157         hdl = i40iw_find_netdev(event_netdev);
 158         if (!hdl)
 159                 return NOTIFY_DONE;
 160
 161         iwdev = &hdl->device;
 162         if (iwdev->init_state < INET_NOTIFIER)
 163                 return NOTIFY_DONE;
 164
 165         netdev = iwdev->ldev->netdev;
 166         upper_dev = netdev_master_upper_dev_get(netdev);
 167         if (netdev != event_netdev)
 168                 return NOTIFY_DONE;
 169
 170         switch (event) {
 171         case NETDEV_DOWN:
 172                 if (upper_dev)
 173                         local_ipaddr = ntohl(
 174                                 ((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address);
 175                 else
 176                         local_ipaddr = ntohl(ifa->ifa_address);
 177                 i40iw_manage_arp_cache(iwdev,
 178                                        netdev->dev_addr,
 179                                        &local_ipaddr,
 180                                        true,
 181                                        I40IW_ARP_DELETE);
 182                 return NOTIFY_OK;
 183         case NETDEV_UP:
 184                 if (upper_dev)
 185                         local_ipaddr = ntohl(
 186                                 ((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address);
 187                 else
 188                         local_ipaddr = ntohl(ifa->ifa_address);
 189                 i40iw_manage_arp_cache(iwdev,
 190                                        netdev->dev_addr,
 191                                        &local_ipaddr,
 192                                        true,
 193                                        I40IW_ARP_ADD);
 194                 break;
 195         case NETDEV_CHANGEADDR:
 196                 /* Add the address to the IP table */
 197                 if (upper_dev)
 198                         local_ipaddr = ntohl(
 199                                 ((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address);
 200                 else
 201                         local_ipaddr = ntohl(ifa->ifa_address);
 202
 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         u32 local_ipaddr6[4];
 231
 232         hdl = i40iw_find_netdev(event_netdev);
 233         if (!hdl)
 234                 return NOTIFY_DONE;
 235
 236         iwdev = &hdl->device;
 237         if (iwdev->init_state < INET_NOTIFIER)
 238                 return NOTIFY_DONE;
 239
 240         netdev = iwdev->ldev->netdev;
 241         if (netdev != event_netdev)
 242                 return NOTIFY_DONE;
 243
 244         switch (event) {
 245         case NETDEV_DOWN:
 246                 i40iw_copy_ip_ntohl(local_ipaddr6, ifa->addr.in6_u.u6_addr32);
 247                 i40iw_manage_arp_cache(iwdev,
 248                                        netdev->dev_addr,
 249                                        local_ipaddr6,
 250                                        false,
 251                                        I40IW_ARP_DELETE);
 252                 return NOTIFY_OK;
 253         case NETDEV_UP:
 254                 /* Fall through */
 255         case NETDEV_CHANGEADDR:
 256                 i40iw_copy_ip_ntohl(local_ipaddr6, ifa->addr.in6_u.u6_addr32);
 257                 i40iw_manage_arp_cache(iwdev,
 258                                        netdev->dev_addr,
 259                                        local_ipaddr6,
 260                                        false,
 261                                        I40IW_ARP_ADD);
 262                 break;
 263         default:
 264                 break;
 265         }
 266         return NOTIFY_DONE;
 267 }
 268
 269 /**
 270  * i40iw_net_event - system notifier for net events
 271  * @notfier: not used
 272  * @event: event for notifier
 273  * @ptr: neighbor
 274  */
 275 int i40iw_net_event(struct notifier_block *notifier, unsigned long event, void *ptr)
 276 {
 277         struct neighbour *neigh = ptr;
 278         struct i40iw_device *iwdev;
 279         struct i40iw_handler *iwhdl;
 280         __be32 *p;
 281         u32 local_ipaddr[4];
 282
 283         switch (event) {
 284         case NETEVENT_NEIGH_UPDATE:
 285                 iwhdl = i40iw_find_netdev((struct net_device *)neigh->dev);
 286                 if (!iwhdl)
 287                         return NOTIFY_DONE;
 288                 iwdev = &iwhdl->device;
 289                 if (iwdev->init_state < INET_NOTIFIER)
 290                         return NOTIFY_DONE;
 291                 p = (__be32 *)neigh->primary_key;
 292                 i40iw_copy_ip_ntohl(local_ipaddr, p);
 293                 if (neigh->nud_state & NUD_VALID) {
 294                         i40iw_manage_arp_cache(iwdev,
 295                                                neigh->ha,
 296                                                local_ipaddr,
 297                                                false,
 298                                                I40IW_ARP_ADD);
 299
 300                 } else {
 301                         i40iw_manage_arp_cache(iwdev,
 302                                                neigh->ha,
 303                                                local_ipaddr,
 304                                                false,
 305                                                I40IW_ARP_DELETE);
 306                 }
 307                 break;
 308         default:
 309                 break;
 310         }
 311         return NOTIFY_DONE;
 312 }
 313
 314 /**
 315  * i40iw_get_cqp_request - get cqp struct
 316  * @cqp: device cqp ptr
 317  * @wait: cqp to be used in wait mode
 318  */
 319 struct i40iw_cqp_request *i40iw_get_cqp_request(struct i40iw_cqp *cqp, bool wait)
 320 {
 321         struct i40iw_cqp_request *cqp_request = NULL;
 322         unsigned long flags;
 323
 324         spin_lock_irqsave(&cqp->req_lock, flags);
 325         if (!list_empty(&cqp->cqp_avail_reqs)) {
 326                 cqp_request = list_entry(cqp->cqp_avail_reqs.next,
 327                                          struct i40iw_cqp_request, list);
 328                 list_del_init(&cqp_request->list);
 329         }
 330         spin_unlock_irqrestore(&cqp->req_lock, flags);
 331         if (!cqp_request) {
 332                 cqp_request = kzalloc(sizeof(*cqp_request), GFP_ATOMIC);
 333                 if (cqp_request) {
 334                         cqp_request->dynamic = true;
 335                         INIT_LIST_HEAD(&cqp_request->list);
 336                         init_waitqueue_head(&cqp_request->waitq);
 337                 }
 338         }
 339         if (!cqp_request) {
 340                 i40iw_pr_err("CQP Request Fail: No Memory");
 341                 return NULL;
 342         }
 343
 344         if (wait) {
 345                 atomic_set(&cqp_request->refcount, 2);
 346                 cqp_request->waiting = true;
 347         } else {
 348                 atomic_set(&cqp_request->refcount, 1);
 349         }
 350         return cqp_request;
 351 }
 352
 353 /**
 354  * i40iw_free_cqp_request - free cqp request
 355  * @cqp: cqp ptr
 356  * @cqp_request: to be put back in cqp list
 357  */
 358 void i40iw_free_cqp_request(struct i40iw_cqp *cqp, struct i40iw_cqp_request *cqp_request)
 359 {
 360         unsigned long flags;
 361
 362         if (cqp_request->dynamic) {
 363                 kfree(cqp_request);
 364         } else {
 365                 cqp_request->request_done = false;
 366                 cqp_request->callback_fcn = NULL;
 367                 cqp_request->waiting = false;
 368
 369                 spin_lock_irqsave(&cqp->req_lock, flags);
 370                 list_add_tail(&cqp_request->list, &cqp->cqp_avail_reqs);
 371                 spin_unlock_irqrestore(&cqp->req_lock, flags);
 372         }
 373 }
 374
 375 /**
 376  * i40iw_put_cqp_request - dec ref count and free if 0
 377  * @cqp: cqp ptr
 378  * @cqp_request: to be put back in cqp list
 379  */
 380 void i40iw_put_cqp_request(struct i40iw_cqp *cqp,
 381                            struct i40iw_cqp_request *cqp_request)
 382 {
 383         if (atomic_dec_and_test(&cqp_request->refcount))
 384                 i40iw_free_cqp_request(cqp, cqp_request);
 385 }
 386
 387 /**
 388  * i40iw_free_qp - callback after destroy cqp completes
 389  * @cqp_request: cqp request for destroy qp
 390  * @num: not used
 391  */
 392 static void i40iw_free_qp(struct i40iw_cqp_request *cqp_request, u32 num)
 393 {
 394         struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)cqp_request->param;
 395         struct i40iw_qp *iwqp = (struct i40iw_qp *)qp->back_qp;
 396         struct i40iw_device *iwdev;
 397         u32 qp_num = iwqp->ibqp.qp_num;
 398
 399         iwdev = iwqp->iwdev;
 400
 401         i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
 402         i40iw_free_qp_resources(iwdev, iwqp, qp_num);
 403 }
 404
 405 /**
 406  * i40iw_wait_event - wait for completion
 407  * @iwdev: iwarp device
 408  * @cqp_request: cqp request to wait
 409  */
 410 static int i40iw_wait_event(struct i40iw_device *iwdev,
 411                             struct i40iw_cqp_request *cqp_request)
 412 {
 413         struct cqp_commands_info *info = &cqp_request->info;
 414         struct i40iw_cqp *iwcqp = &iwdev->cqp;
 415         bool cqp_error = false;
 416         int err_code = 0;
 417         int timeout_ret = 0;
 418
 419         timeout_ret = wait_event_timeout(cqp_request->waitq,
 420                                          cqp_request->request_done,
 421                                          I40IW_EVENT_TIMEOUT);
 422         if (!timeout_ret) {
 423                 i40iw_pr_err("error cqp command 0x%x timed out ret = %d\n",
 424                              info->cqp_cmd, timeout_ret);
 425                 err_code = -ETIME;
 426                 i40iw_request_reset(iwdev);
 427                 goto done;
 428         }
 429         cqp_error = cqp_request->compl_info.error;
 430         if (cqp_error) {
 431                 i40iw_pr_err("error cqp command 0x%x completion maj = 0x%x min=0x%x\n",
 432                              info->cqp_cmd, cqp_request->compl_info.maj_err_code,
 433                              cqp_request->compl_info.min_err_code);
 434                 err_code = -EPROTO;
 435                 goto done;
 436         }
 437 done:
 438         i40iw_put_cqp_request(iwcqp, cqp_request);
 439         return err_code;
 440 }
 441
 442 /**
 443  * i40iw_handle_cqp_op - process cqp command
 444  * @iwdev: iwarp device
 445  * @cqp_request: cqp request to process
 446  */
 447 enum i40iw_status_code i40iw_handle_cqp_op(struct i40iw_device *iwdev,
 448                                            struct i40iw_cqp_request
 449                                            *cqp_request)
 450 {
 451         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 452         enum i40iw_status_code status;
 453         struct cqp_commands_info *info = &cqp_request->info;
 454         int err_code = 0;
 455
 456         status = i40iw_process_cqp_cmd(dev, info);
 457         if (status) {
 458                 i40iw_pr_err("error cqp command 0x%x failed\n", info->cqp_cmd);
 459                 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
 460                 return status;
 461         }
 462         if (cqp_request->waiting)
 463                 err_code = i40iw_wait_event(iwdev, cqp_request);
 464         if (err_code)
 465                 status = I40IW_ERR_CQP_COMPL_ERROR;
 466         return status;
 467 }
 468
 469 /**
 470  * i40iw_add_pdusecount - add pd refcount
 471  * @iwpd: pd for refcount
 472  */
 473 void i40iw_add_pdusecount(struct i40iw_pd *iwpd)
 474 {
 475         atomic_inc(&iwpd->usecount);
 476 }
 477
 478 /**
 479  * i40iw_rem_pdusecount - decrement refcount for pd and free if 0
 480  * @iwpd: pd for refcount
 481  * @iwdev: iwarp device
 482  */
 483 void i40iw_rem_pdusecount(struct i40iw_pd *iwpd, struct i40iw_device *iwdev)
 484 {
 485         if (!atomic_dec_and_test(&iwpd->usecount))
 486                 return;
 487         i40iw_free_resource(iwdev, iwdev->allocated_pds, iwpd->sc_pd.pd_id);
 488         kfree(iwpd);
 489 }
 490
 491 /**
 492  * i40iw_add_ref - add refcount for qp
 493  * @ibqp: iqarp qp
 494  */
 495 void i40iw_add_ref(struct ib_qp *ibqp)
 496 {
 497         struct i40iw_qp *iwqp = (struct i40iw_qp *)ibqp;
 498
 499         atomic_inc(&iwqp->refcount);
 500 }
 501
 502 /**
 503  * i40iw_rem_ref - rem refcount for qp and free if 0
 504  * @ibqp: iqarp qp
 505  */
 506 void i40iw_rem_ref(struct ib_qp *ibqp)
 507 {
 508         struct i40iw_qp *iwqp;
 509         enum i40iw_status_code status;
 510         struct i40iw_cqp_request *cqp_request;
 511         struct cqp_commands_info *cqp_info;
 512         struct i40iw_device *iwdev;
 513         u32 qp_num;
 514         unsigned long flags;
 515
 516         iwqp = to_iwqp(ibqp);
 517         iwdev = iwqp->iwdev;
 518         spin_lock_irqsave(&iwdev->qptable_lock, flags);
 519         if (!atomic_dec_and_test(&iwqp->refcount)) {
 520                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 521                 return;
 522         }
 523
 524         qp_num = iwqp->ibqp.qp_num;
 525         iwdev->qp_table[qp_num] = NULL;
 526         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 527         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 528         if (!cqp_request)
 529                 return;
 530
 531         cqp_request->callback_fcn = i40iw_free_qp;
 532         cqp_request->param = (void *)&iwqp->sc_qp;
 533         cqp_info = &cqp_request->info;
 534         cqp_info->cqp_cmd = OP_QP_DESTROY;
 535         cqp_info->post_sq = 1;
 536         cqp_info->in.u.qp_destroy.qp = &iwqp->sc_qp;
 537         cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
 538         cqp_info->in.u.qp_destroy.remove_hash_idx = true;
 539         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 540         if (status)
 541                 i40iw_pr_err("CQP-OP Destroy QP fail");
 542 }
 543
 544 /**
 545  * i40iw_get_qp - get qp address
 546  * @device: iwarp device
 547  * @qpn: qp number
 548  */
 549 struct ib_qp *i40iw_get_qp(struct ib_device *device, int qpn)
 550 {
 551         struct i40iw_device *iwdev = to_iwdev(device);
 552
 553         if ((qpn < IW_FIRST_QPN) || (qpn >= iwdev->max_qp))
 554                 return NULL;
 555
 556         return &iwdev->qp_table[qpn]->ibqp;
 557 }
 558
 559 /**
 560  * i40iw_debug_buf - print debug msg and buffer is mask set
 561  * @dev: hardware control device structure
 562  * @mask: mask to compare if to print debug buffer
 563  * @buf: points buffer addr
 564  * @size: saize of buffer to print
 565  */
 566 void i40iw_debug_buf(struct i40iw_sc_dev *dev,
 567                      enum i40iw_debug_flag mask,
 568                      char *desc,
 569                      u64 *buf,
 570                      u32 size)
 571 {
 572         u32 i;
 573
 574         if (!(dev->debug_mask & mask))
 575                 return;
 576         i40iw_debug(dev, mask, "%s\n", desc);
 577         i40iw_debug(dev, mask, "starting address virt=%p phy=%llxh\n", buf,
 578                     (unsigned long long)virt_to_phys(buf));
 579
 580         for (i = 0; i < size; i += 8)
 581                 i40iw_debug(dev, mask, "index %03d val: %016llx\n", i, buf[i / 8]);
 582 }
 583
 584 /**
 585  * i40iw_get_hw_addr - return hw addr
 586  * @par: points to shared dev
 587  */
 588 u8 __iomem *i40iw_get_hw_addr(void *par)
 589 {
 590         struct i40iw_sc_dev *dev = (struct i40iw_sc_dev *)par;
 591
 592         return dev->hw->hw_addr;
 593 }
 594
 595 /**
 596  * i40iw_remove_head - return head entry and remove from list
 597  * @list: list for entry
 598  */
 599 void *i40iw_remove_head(struct list_head *list)
 600 {
 601         struct list_head *entry;
 602
 603         if (list_empty(list))
 604                 return NULL;
 605
 606         entry = (void *)list->next;
 607         list_del(entry);
 608         return (void *)entry;
 609 }
 610
 611 /**
 612  * i40iw_allocate_dma_mem - Memory alloc helper fn
 613  * @hw:   pointer to the HW structure
 614  * @mem:  ptr to mem struct to fill out
 615  * @size: size of memory requested
 616  * @alignment: what to align the allocation to
 617  */
 618 enum i40iw_status_code i40iw_allocate_dma_mem(struct i40iw_hw *hw,
 619                                               struct i40iw_dma_mem *mem,
 620                                               u64 size,
 621                                               u32 alignment)
 622 {
 623         struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 624
 625         if (!mem)
 626                 return I40IW_ERR_PARAM;
 627         mem->size = ALIGN(size, alignment);
 628         mem->va = dma_zalloc_coherent(&pcidev->dev, mem->size,
 629                                       (dma_addr_t *)&mem->pa, GFP_KERNEL);
 630         if (!mem->va)
 631                 return I40IW_ERR_NO_MEMORY;
 632         return 0;
 633 }
 634
 635 /**
 636  * i40iw_free_dma_mem - Memory free helper fn
 637  * @hw:   pointer to the HW structure
 638  * @mem:  ptr to mem struct to free
 639  */
 640 void i40iw_free_dma_mem(struct i40iw_hw *hw, struct i40iw_dma_mem *mem)
 641 {
 642         struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 643
 644         if (!mem || !mem->va)
 645                 return;
 646
 647         dma_free_coherent(&pcidev->dev, mem->size,
 648                           mem->va, (dma_addr_t)mem->pa);
 649         mem->va = NULL;
 650 }
 651
 652 /**
 653  * i40iw_allocate_virt_mem - virtual memory alloc helper fn
 654  * @hw:   pointer to the HW structure
 655  * @mem:  ptr to mem struct to fill out
 656  * @size: size of memory requested
 657  */
 658 enum i40iw_status_code i40iw_allocate_virt_mem(struct i40iw_hw *hw,
 659                                                struct i40iw_virt_mem *mem,
 660                                                u32 size)
 661 {
 662         if (!mem)
 663                 return I40IW_ERR_PARAM;
 664
 665         mem->size = size;
 666         mem->va = kzalloc(size, GFP_KERNEL);
 667
 668         if (mem->va)
 669                 return 0;
 670         else
 671                 return I40IW_ERR_NO_MEMORY;
 672 }
 673
 674 /**
 675  * i40iw_free_virt_mem - virtual memory free helper fn
 676  * @hw:   pointer to the HW structure
 677  * @mem:  ptr to mem struct to free
 678  */
 679 enum i40iw_status_code i40iw_free_virt_mem(struct i40iw_hw *hw,
 680                                            struct i40iw_virt_mem *mem)
 681 {
 682         if (!mem)
 683                 return I40IW_ERR_PARAM;
 684         /*
 685          * mem->va points to the parent of mem, so both mem and mem->va
 686          * can not be touched once mem->va is freed
 687          */
 688         kfree(mem->va);
 689         return 0;
 690 }
 691
 692 /**
 693  * i40iw_cqp_sds_cmd - create cqp command for sd
 694  * @dev: hardware control device structure
 695  * @sd_info: information  for sd cqp
 696  *
 697  */
 698 enum i40iw_status_code i40iw_cqp_sds_cmd(struct i40iw_sc_dev *dev,
 699                                          struct i40iw_update_sds_info *sdinfo)
 700 {
 701         enum i40iw_status_code status;
 702         struct i40iw_cqp_request *cqp_request;
 703         struct cqp_commands_info *cqp_info;
 704         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 705
 706         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 707         if (!cqp_request)
 708                 return I40IW_ERR_NO_MEMORY;
 709         cqp_info = &cqp_request->info;
 710         memcpy(&cqp_info->in.u.update_pe_sds.info, sdinfo,
 711                sizeof(cqp_info->in.u.update_pe_sds.info));
 712         cqp_info->cqp_cmd = OP_UPDATE_PE_SDS;
 713         cqp_info->post_sq = 1;
 714         cqp_info->in.u.update_pe_sds.dev = dev;
 715         cqp_info->in.u.update_pe_sds.scratch = (uintptr_t)cqp_request;
 716         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 717         if (status)
 718                 i40iw_pr_err("CQP-OP Update SD's fail");
 719         return status;
 720 }
 721
 722 /**
 723  * i40iw_term_modify_qp - modify qp for term message
 724  * @qp: hardware control qp
 725  * @next_state: qp's next state
 726  * @term: terminate code
 727  * @term_len: length
 728  */
 729 void i40iw_term_modify_qp(struct i40iw_sc_qp *qp, u8 next_state, u8 term, u8 term_len)
 730 {
 731         struct i40iw_qp *iwqp;
 732
 733         iwqp = (struct i40iw_qp *)qp->back_qp;
 734         i40iw_next_iw_state(iwqp, next_state, 0, term, term_len);
 735 };
 736
 737 /**
 738  * i40iw_terminate_done - after terminate is completed
 739  * @qp: hardware control qp
 740  * @timeout_occurred: indicates if terminate timer expired
 741  */
 742 void i40iw_terminate_done(struct i40iw_sc_qp *qp, int timeout_occurred)
 743 {
 744         struct i40iw_qp *iwqp;
 745         u32 next_iwarp_state = I40IW_QP_STATE_ERROR;
 746         u8 hte = 0;
 747         bool first_time;
 748         unsigned long flags;
 749
 750         iwqp = (struct i40iw_qp *)qp->back_qp;
 751         spin_lock_irqsave(&iwqp->lock, flags);
 752         if (iwqp->hte_added) {
 753                 iwqp->hte_added = 0;
 754                 hte = 1;
 755         }
 756         first_time = !(qp->term_flags & I40IW_TERM_DONE);
 757         qp->term_flags |= I40IW_TERM_DONE;
 758         spin_unlock_irqrestore(&iwqp->lock, flags);
 759         if (first_time) {
 760                 if (!timeout_occurred)
 761                         i40iw_terminate_del_timer(qp);
 762                 else
 763                         next_iwarp_state = I40IW_QP_STATE_CLOSING;
 764
 765                 i40iw_next_iw_state(iwqp, next_iwarp_state, hte, 0, 0);
 766                 i40iw_cm_disconn(iwqp);
 767         }
 768 }
 769
 770 /**
 771  * i40iw_terminate_imeout - timeout happened
 772  * @context: points to iwarp qp
 773  */
 774 static void i40iw_terminate_timeout(unsigned long context)
 775 {
 776         struct i40iw_qp *iwqp = (struct i40iw_qp *)context;
 777         struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)&iwqp->sc_qp;
 778
 779         i40iw_terminate_done(qp, 1);
 780 }
 781
 782 /**
 783  * i40iw_terminate_start_timer - start terminate timeout
 784  * @qp: hardware control qp
 785  */
 786 void i40iw_terminate_start_timer(struct i40iw_sc_qp *qp)
 787 {
 788         struct i40iw_qp *iwqp;
 789
 790         iwqp = (struct i40iw_qp *)qp->back_qp;
 791         init_timer(&iwqp->terminate_timer);
 792         iwqp->terminate_timer.function = i40iw_terminate_timeout;
 793         iwqp->terminate_timer.expires = jiffies + HZ;
 794         iwqp->terminate_timer.data = (unsigned long)iwqp;
 795         add_timer(&iwqp->terminate_timer);
 796 }
 797
 798 /**
 799  * i40iw_terminate_del_timer - delete terminate timeout
 800  * @qp: hardware control qp
 801  */
 802 void i40iw_terminate_del_timer(struct i40iw_sc_qp *qp)
 803 {
 804         struct i40iw_qp *iwqp;
 805
 806         iwqp = (struct i40iw_qp *)qp->back_qp;
 807         del_timer(&iwqp->terminate_timer);
 808 }
 809
 810 /**
 811  * i40iw_cqp_generic_worker - generic worker for cqp
 812  * @work: work pointer
 813  */
 814 static void i40iw_cqp_generic_worker(struct work_struct *work)
 815 {
 816         struct i40iw_virtchnl_work_info *work_info =
 817             &((struct virtchnl_work *)work)->work_info;
 818
 819         if (work_info->worker_vf_dev)
 820                 work_info->callback_fcn(work_info->worker_vf_dev);
 821 }
 822
 823 /**
 824  * i40iw_cqp_spawn_worker - spawn worket thread
 825  * @iwdev: device struct pointer
 826  * @work_info: work request info
 827  * @iw_vf_idx: virtual function index
 828  */
 829 void i40iw_cqp_spawn_worker(struct i40iw_sc_dev *dev,
 830                             struct i40iw_virtchnl_work_info *work_info,
 831                             u32 iw_vf_idx)
 832 {
 833         struct virtchnl_work *work;
 834         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 835
 836         work = &iwdev->virtchnl_w[iw_vf_idx];
 837         memcpy(&work->work_info, work_info, sizeof(*work_info));
 838         INIT_WORK(&work->work, i40iw_cqp_generic_worker);
 839         queue_work(iwdev->virtchnl_wq, &work->work);
 840 }
 841
 842 /**
 843  * i40iw_cqp_manage_hmc_fcn_worker -
 844  * @work: work pointer for hmc info
 845  */
 846 static void i40iw_cqp_manage_hmc_fcn_worker(struct work_struct *work)
 847 {
 848         struct i40iw_cqp_request *cqp_request =
 849             ((struct virtchnl_work *)work)->cqp_request;
 850         struct i40iw_ccq_cqe_info ccq_cqe_info;
 851         struct i40iw_hmc_fcn_info *hmcfcninfo =
 852                         &cqp_request->info.in.u.manage_hmc_pm.info;
 853         struct i40iw_device *iwdev =
 854             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->back_dev;
 855
 856         ccq_cqe_info.cqp = NULL;
 857         ccq_cqe_info.maj_err_code = cqp_request->compl_info.maj_err_code;
 858         ccq_cqe_info.min_err_code = cqp_request->compl_info.min_err_code;
 859         ccq_cqe_info.op_code = cqp_request->compl_info.op_code;
 860         ccq_cqe_info.op_ret_val = cqp_request->compl_info.op_ret_val;
 861         ccq_cqe_info.scratch = 0;
 862         ccq_cqe_info.error = cqp_request->compl_info.error;
 863         hmcfcninfo->callback_fcn(cqp_request->info.in.u.manage_hmc_pm.dev,
 864                                  hmcfcninfo->cqp_callback_param, &ccq_cqe_info);
 865         i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
 866 }
 867
 868 /**
 869  * i40iw_cqp_manage_hmc_fcn_callback - called function after cqp completion
 870  * @cqp_request: cqp request info struct for hmc fun
 871  * @unused: unused param of callback
 872  */
 873 static void i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request *cqp_request,
 874                                               u32 unused)
 875 {
 876         struct virtchnl_work *work;
 877         struct i40iw_hmc_fcn_info *hmcfcninfo =
 878             &cqp_request->info.in.u.manage_hmc_pm.info;
 879         struct i40iw_device *iwdev =
 880             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->
 881             back_dev;
 882
 883         if (hmcfcninfo && hmcfcninfo->callback_fcn) {
 884                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s1\n", __func__);
 885                 atomic_inc(&cqp_request->refcount);
 886                 work = &iwdev->virtchnl_w[hmcfcninfo->iw_vf_idx];
 887                 work->cqp_request = cqp_request;
 888                 INIT_WORK(&work->work, i40iw_cqp_manage_hmc_fcn_worker);
 889                 queue_work(iwdev->virtchnl_wq, &work->work);
 890                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s2\n", __func__);
 891         } else {
 892                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s: Something wrong\n", __func__);
 893         }
 894 }
 895
 896 /**
 897  * i40iw_cqp_manage_hmc_fcn_cmd - issue cqp command to manage hmc
 898  * @dev: hardware control device structure
 899  * @hmcfcninfo: info for hmc
 900  */
 901 enum i40iw_status_code i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev *dev,
 902                                                     struct i40iw_hmc_fcn_info *hmcfcninfo)
 903 {
 904         enum i40iw_status_code status;
 905         struct i40iw_cqp_request *cqp_request;
 906         struct cqp_commands_info *cqp_info;
 907         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 908
 909         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s\n", __func__);
 910         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 911         if (!cqp_request)
 912                 return I40IW_ERR_NO_MEMORY;
 913         cqp_info = &cqp_request->info;
 914         cqp_request->callback_fcn = i40iw_cqp_manage_hmc_fcn_callback;
 915         cqp_request->param = hmcfcninfo;
 916         memcpy(&cqp_info->in.u.manage_hmc_pm.info, hmcfcninfo,
 917                sizeof(*hmcfcninfo));
 918         cqp_info->in.u.manage_hmc_pm.dev = dev;
 919         cqp_info->cqp_cmd = OP_MANAGE_HMC_PM_FUNC_TABLE;
 920         cqp_info->post_sq = 1;
 921         cqp_info->in.u.manage_hmc_pm.scratch = (uintptr_t)cqp_request;
 922         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 923         if (status)
 924                 i40iw_pr_err("CQP-OP Manage HMC fail");
 925         return status;
 926 }
 927
 928 /**
 929  * i40iw_cqp_query_fpm_values_cmd - send cqp command for fpm
 930  * @iwdev: function device struct
 931  * @values_mem: buffer for fpm
 932  * @hmc_fn_id: function id for fpm
 933  */
 934 enum i40iw_status_code i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev *dev,
 935                                                       struct i40iw_dma_mem *values_mem,
 936                                                       u8 hmc_fn_id)
 937 {
 938         enum i40iw_status_code status;
 939         struct i40iw_cqp_request *cqp_request;
 940         struct cqp_commands_info *cqp_info;
 941         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 942
 943         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 944         if (!cqp_request)
 945                 return I40IW_ERR_NO_MEMORY;
 946         cqp_info = &cqp_request->info;
 947         cqp_request->param = NULL;
 948         cqp_info->in.u.query_fpm_values.cqp = dev->cqp;
 949         cqp_info->in.u.query_fpm_values.fpm_values_pa = values_mem->pa;
 950         cqp_info->in.u.query_fpm_values.fpm_values_va = values_mem->va;
 951         cqp_info->in.u.query_fpm_values.hmc_fn_id = hmc_fn_id;
 952         cqp_info->cqp_cmd = OP_QUERY_FPM_VALUES;
 953         cqp_info->post_sq = 1;
 954         cqp_info->in.u.query_fpm_values.scratch = (uintptr_t)cqp_request;
 955         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 956         if (status)
 957                 i40iw_pr_err("CQP-OP Query FPM fail");
 958         return status;
 959 }
 960
 961 /**
 962  * i40iw_cqp_commit_fpm_values_cmd - commit fpm values in hw
 963  * @dev: hardware control device structure
 964  * @values_mem: buffer with fpm values
 965  * @hmc_fn_id: function id for fpm
 966  */
 967 enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
 968                                                        struct i40iw_dma_mem *values_mem,
 969                                                        u8 hmc_fn_id)
 970 {
 971         enum i40iw_status_code status;
 972         struct i40iw_cqp_request *cqp_request;
 973         struct cqp_commands_info *cqp_info;
 974         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 975
 976         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 977         if (!cqp_request)
 978                 return I40IW_ERR_NO_MEMORY;
 979         cqp_info = &cqp_request->info;
 980         cqp_request->param = NULL;
 981         cqp_info->in.u.commit_fpm_values.cqp = dev->cqp;
 982         cqp_info->in.u.commit_fpm_values.fpm_values_pa = values_mem->pa;
 983         cqp_info->in.u.commit_fpm_values.fpm_values_va = values_mem->va;
 984         cqp_info->in.u.commit_fpm_values.hmc_fn_id = hmc_fn_id;
 985         cqp_info->cqp_cmd = OP_COMMIT_FPM_VALUES;
 986         cqp_info->post_sq = 1;
 987         cqp_info->in.u.commit_fpm_values.scratch = (uintptr_t)cqp_request;
 988         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 989         if (status)
 990                 i40iw_pr_err("CQP-OP Commit FPM fail");
 991         return status;
 992 }
 993
 994 /**
 995  * i40iw_vf_wait_vchnl_resp - wait for channel msg
 996  * @iwdev: function's device struct
 997  */
 998 enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
 999 {
1000         struct i40iw_device *iwdev = dev->back_dev;
1001         int timeout_ret;
1002
1003         i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
1004                     __func__, __LINE__, dev, iwdev);
1005
1006         atomic_set(&iwdev->vchnl_msgs, 2);
1007         timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
1008                                          (atomic_read(&iwdev->vchnl_msgs) == 1),
1009                                          I40IW_VCHNL_EVENT_TIMEOUT);
1010         atomic_dec(&iwdev->vchnl_msgs);
1011         if (!timeout_ret) {
1012                 i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
1013                 atomic_set(&iwdev->vchnl_msgs, 0);
1014                 dev->vchnl_up = false;
1015                 return I40IW_ERR_TIMEOUT;
1016         }
1017         wake_up(&dev->vf_reqs);
1018         return 0;
1019 }
1020
1021 /**
1022  * i40iw_ieq_mpa_crc_ae - generate AE for crc error
1023  * @dev: hardware control device structure
1024  * @qp: hardware control qp
1025  */
1026 void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1027 {
1028         struct i40iw_qp_flush_info info;
1029         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1030
1031         i40iw_debug(dev, I40IW_DEBUG_AEQ, "%s entered\n", __func__);
1032         memset(&info, 0, sizeof(info));
1033         info.ae_code = I40IW_AE_LLP_RECEIVED_MPA_CRC_ERROR;
1034         info.generate_ae = true;
1035         info.ae_source = 0x3;
1036         (void)i40iw_hw_flush_wqes(iwdev, qp, &info, false);
1037 }
1038
1039 /**
1040  * i40iw_init_hash_desc - initialize hash for crc calculation
1041  * @desc: cryption type
1042  */
1043 enum i40iw_status_code i40iw_init_hash_desc(struct shash_desc **desc)
1044 {
1045         struct crypto_shash *tfm;
1046         struct shash_desc *tdesc;
1047
1048         tfm = crypto_alloc_shash("crc32c", 0, 0);
1049         if (IS_ERR(tfm))
1050                 return I40IW_ERR_MPA_CRC;
1051
1052         tdesc = kzalloc(sizeof(*tdesc) + crypto_shash_descsize(tfm),
1053                         GFP_KERNEL);
1054         if (!tdesc) {
1055                 crypto_free_shash(tfm);
1056                 return I40IW_ERR_MPA_CRC;
1057         }
1058         tdesc->tfm = tfm;
1059         *desc = tdesc;
1060
1061         return 0;
1062 }
1063
1064 /**
1065  * i40iw_free_hash_desc - free hash desc
1066  * @desc: to be freed
1067  */
1068 void i40iw_free_hash_desc(struct shash_desc *desc)
1069 {
1070         if (desc) {
1071                 crypto_free_shash(desc->tfm);
1072                 kfree(desc);
1073         }
1074 }
1075
1076 /**
1077  * i40iw_alloc_query_fpm_buf - allocate buffer for fpm
1078  * @dev: hardware control device structure
1079  * @mem: buffer ptr for fpm to be allocated
1080  * @return: memory allocation status
1081  */
1082 enum i40iw_status_code i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev *dev,
1083                                                  struct i40iw_dma_mem *mem)
1084 {
1085         enum i40iw_status_code status;
1086         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1087
1088         status = i40iw_obj_aligned_mem(iwdev, mem, I40IW_QUERY_FPM_BUF_SIZE,
1089                                        I40IW_FPM_QUERY_BUF_ALIGNMENT_MASK);
1090         return status;
1091 }
1092
1093 /**
1094  * i40iw_ieq_check_mpacrc - check if mpa crc is OK
1095  * @desc: desc for hash
1096  * @addr: address of buffer for crc
1097  * @length: length of buffer
1098  * @value: value to be compared
1099  */
1100 enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc,
1101                                               void *addr,
1102                                               u32 length,
1103                                               u32 value)
1104 {
1105         u32 crc = 0;
1106         int ret;
1107         enum i40iw_status_code ret_code = 0;
1108
1109         crypto_shash_init(desc);
1110         ret = crypto_shash_update(desc, addr, length);
1111         if (!ret)
1112                 crypto_shash_final(desc, (u8 *)&crc);
1113         if (crc != value) {
1114                 i40iw_pr_err("mpa crc check fail\n");
1115                 ret_code = I40IW_ERR_MPA_CRC;
1116         }
1117         return ret_code;
1118 }
1119
1120 /**
1121  * i40iw_ieq_get_qp - get qp based on quad in puda buffer
1122  * @dev: hardware control device structure
1123  * @buf: receive puda buffer on exception q
1124  */
1125 struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev,
1126                                      struct i40iw_puda_buf *buf)
1127 {
1128         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1129         struct i40iw_qp *iwqp;
1130         struct i40iw_cm_node *cm_node;
1131         u32 loc_addr[4], rem_addr[4];
1132         u16 loc_port, rem_port;
1133         struct ipv6hdr *ip6h;
1134         struct iphdr *iph = (struct iphdr *)buf->iph;
1135         struct tcphdr *tcph = (struct tcphdr *)buf->tcph;
1136
1137         if (iph->version == 4) {
1138                 memset(loc_addr, 0, sizeof(loc_addr));
1139                 loc_addr[0] = ntohl(iph->daddr);
1140                 memset(rem_addr, 0, sizeof(rem_addr));
1141                 rem_addr[0] = ntohl(iph->saddr);
1142         } else {
1143                 ip6h = (struct ipv6hdr *)buf->iph;
1144                 i40iw_copy_ip_ntohl(loc_addr, ip6h->daddr.in6_u.u6_addr32);
1145                 i40iw_copy_ip_ntohl(rem_addr, ip6h->saddr.in6_u.u6_addr32);
1146         }
1147         loc_port = ntohs(tcph->dest);
1148         rem_port = ntohs(tcph->source);
1149
1150         cm_node = i40iw_find_node(&iwdev->cm_core, rem_port, rem_addr, loc_port,
1151                                   loc_addr, false);
1152         if (!cm_node)
1153                 return NULL;
1154         iwqp = cm_node->iwqp;
1155         return &iwqp->sc_qp;
1156 }
1157
1158 /**
1159  * i40iw_ieq_update_tcpip_info - update tcpip in the buffer
1160  * @buf: puda to update
1161  * @length: length of buffer
1162  * @seqnum: seq number for tcp
1163  */
1164 void i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf *buf, u16 length, u32 seqnum)
1165 {
1166         struct tcphdr *tcph;
1167         struct iphdr *iph;
1168         u16 iphlen;
1169         u16 packetsize;
1170         u8 *addr = (u8 *)buf->mem.va;
1171
1172         iphlen = (buf->ipv4) ? 20 : 40;
1173         iph = (struct iphdr *)(addr + buf->maclen);
1174         tcph = (struct tcphdr *)(addr + buf->maclen + iphlen);
1175         packetsize = length + buf->tcphlen + iphlen;
1176
1177         iph->tot_len = htons(packetsize);
1178         tcph->seq = htonl(seqnum);
1179 }
1180
1181 /**
1182  * i40iw_puda_get_tcpip_info - get tcpip info from puda buffer
1183  * @info: to get information
1184  * @buf: puda buffer
1185  */
1186 enum i40iw_status_code i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info *info,
1187                                                  struct i40iw_puda_buf *buf)
1188 {
1189         struct iphdr *iph;
1190         struct ipv6hdr *ip6h;
1191         struct tcphdr *tcph;
1192         u16 iphlen;
1193         u16 pkt_len;
1194         u8 *mem = (u8 *)buf->mem.va;
1195         struct ethhdr *ethh = (struct ethhdr *)buf->mem.va;
1196
1197         if (ethh->h_proto == htons(0x8100)) {
1198                 info->vlan_valid = true;
1199                 buf->vlan_id = ntohs(((struct vlan_ethhdr *)ethh)->h_vlan_TCI) & VLAN_VID_MASK;
1200         }
1201         buf->maclen = (info->vlan_valid) ? 18 : 14;
1202         iphlen = (info->l3proto) ? 40 : 20;
1203         buf->ipv4 = (info->l3proto) ? false : true;
1204         buf->iph = mem + buf->maclen;
1205         iph = (struct iphdr *)buf->iph;
1206
1207         buf->tcph = buf->iph + iphlen;
1208         tcph = (struct tcphdr *)buf->tcph;
1209
1210         if (buf->ipv4) {
1211                 pkt_len = ntohs(iph->tot_len);
1212         } else {
1213                 ip6h = (struct ipv6hdr *)buf->iph;
1214                 pkt_len = ntohs(ip6h->payload_len) + iphlen;
1215         }
1216
1217         buf->totallen = pkt_len + buf->maclen;
1218
1219         if (info->payload_len < buf->totallen - 4) {
1220                 i40iw_pr_err("payload_len = 0x%x totallen expected0x%x\n",
1221                              info->payload_len, buf->totallen);
1222                 return I40IW_ERR_INVALID_SIZE;
1223         }
1224
1225         buf->tcphlen = (tcph->doff) << 2;
1226         buf->datalen = pkt_len - iphlen - buf->tcphlen;
1227         buf->data = (buf->datalen) ? buf->tcph + buf->tcphlen : NULL;
1228         buf->hdrlen = buf->maclen + iphlen + buf->tcphlen;
1229         buf->seqnum = ntohl(tcph->seq);
1230         return 0;
1231 }
1232
1233 /**
1234  * i40iw_hw_stats_timeout - Stats timer-handler which updates all HW stats
1235  * @dev: hardware control device structure
1236  */
1237 static void i40iw_hw_stats_timeout(unsigned long dev)
1238 {
1239         struct i40iw_sc_dev *pf_dev = (struct i40iw_sc_dev *)dev;
1240         struct i40iw_dev_pestat *pf_devstat = &pf_dev->dev_pestat;
1241         struct i40iw_dev_pestat *vf_devstat = NULL;
1242         u16 iw_vf_idx;
1243         unsigned long flags;
1244
1245         /*PF*/
1246         pf_devstat->ops.iw_hw_stat_read_all(pf_devstat, &pf_devstat->hw_stats);
1247         for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
1248                 spin_lock_irqsave(&pf_devstat->stats_lock, flags);
1249                 if (pf_dev->vf_dev[iw_vf_idx]) {
1250                         if (pf_dev->vf_dev[iw_vf_idx]->stats_initialized) {
1251                                 vf_devstat = &pf_dev->vf_dev[iw_vf_idx]->dev_pestat;
1252                                 vf_devstat->ops.iw_hw_stat_read_all(vf_devstat, &vf_devstat->hw_stats);
1253                         }
1254                 }
1255                 spin_unlock_irqrestore(&pf_devstat->stats_lock, flags);
1256         }
1257
1258         mod_timer(&pf_devstat->stats_timer,
1259                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1260 }
1261
1262 /**
1263  * i40iw_hw_stats_start_timer - Start periodic stats timer
1264  * @dev: hardware control device structure
1265  */
1266 void i40iw_hw_stats_start_timer(struct i40iw_sc_dev *dev)
1267 {
1268         struct i40iw_dev_pestat *devstat = &dev->dev_pestat;
1269
1270         init_timer(&devstat->stats_timer);
1271         devstat->stats_timer.function = i40iw_hw_stats_timeout;
1272         devstat->stats_timer.data = (unsigned long)dev;
1273         mod_timer(&devstat->stats_timer,
1274                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1275 }
1276
1277 /**
1278  * i40iw_hw_stats_del_timer - Delete periodic stats timer
1279  * @dev: hardware control device structure
1280  */
1281 void i40iw_hw_stats_del_timer(struct i40iw_sc_dev *dev)
1282 {
1283         struct i40iw_dev_pestat *devstat = &dev->dev_pestat;
1284
1285         del_timer_sync(&devstat->stats_timer);
1286 }