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 ipv4 addr 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         u32 action = I40IW_ARP_ADD;
 157
 158         hdl = i40iw_find_netdev(event_netdev);
 159         if (!hdl)
 160                 return NOTIFY_DONE;
 161
 162         iwdev = &hdl->device;
 163         if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
 164                 return NOTIFY_DONE;
 165
 166         netdev = iwdev->ldev->netdev;
 167         upper_dev = netdev_master_upper_dev_get(netdev);
 168         if (netdev != event_netdev)
 169                 return NOTIFY_DONE;
 170
 171         if (upper_dev) {
 172                 struct in_device *in;
 173
 174                 rcu_read_lock();
 175                 in = __in_dev_get_rcu(upper_dev);
 176
 177                 local_ipaddr = 0;
 178                 if (in) {
 179                         struct in_ifaddr *ifa;
 180
 181                         ifa = rcu_dereference(in->ifa_list);
 182                         if (ifa)
 183                                 local_ipaddr = ntohl(ifa->ifa_address);
 184                 }
 185
 186                 rcu_read_unlock();
 187         } else {
 188                 local_ipaddr = ntohl(ifa->ifa_address);
 189         }
 190         switch (event) {
 191         case NETDEV_DOWN:
 192                 action = I40IW_ARP_DELETE;
 193                 /* Fall through */
 194         case NETDEV_UP:
 195                 /* Fall through */
 196         case NETDEV_CHANGEADDR:
 197
 198                 /* Just skip if no need to handle ARP cache */
 199                 if (!local_ipaddr)
 200                         break;
 201
 202                 i40iw_manage_arp_cache(iwdev,
 203                                        netdev->dev_addr,
 204                                        &local_ipaddr,
 205                                        true,
 206                                        action);
 207                 i40iw_if_notify(iwdev, netdev, &local_ipaddr, true,
 208                                 (action == I40IW_ARP_ADD) ? true : false);
 209                 break;
 210         default:
 211                 break;
 212         }
 213         return NOTIFY_DONE;
 214 }
 215
 216 /**
 217  * i40iw_inet6addr_event - system notifier for ipv6 addr events
 218  * @notfier: not used
 219  * @event: event for notifier
 220  * @ptr: if address
 221  */
 222 int i40iw_inet6addr_event(struct notifier_block *notifier,
 223                           unsigned long event,
 224                           void *ptr)
 225 {
 226         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 227         struct net_device *event_netdev = ifa->idev->dev;
 228         struct net_device *netdev;
 229         struct i40iw_device *iwdev;
 230         struct i40iw_handler *hdl;
 231         u32 local_ipaddr6[4];
 232         u32 action = I40IW_ARP_ADD;
 233
 234         hdl = i40iw_find_netdev(event_netdev);
 235         if (!hdl)
 236                 return NOTIFY_DONE;
 237
 238         iwdev = &hdl->device;
 239         if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
 240                 return NOTIFY_DONE;
 241
 242         netdev = iwdev->ldev->netdev;
 243         if (netdev != event_netdev)
 244                 return NOTIFY_DONE;
 245
 246         i40iw_copy_ip_ntohl(local_ipaddr6, ifa->addr.in6_u.u6_addr32);
 247         switch (event) {
 248         case NETDEV_DOWN:
 249                 action = I40IW_ARP_DELETE;
 250                 /* Fall through */
 251         case NETDEV_UP:
 252                 /* Fall through */
 253         case NETDEV_CHANGEADDR:
 254                 i40iw_manage_arp_cache(iwdev,
 255                                        netdev->dev_addr,
 256                                        local_ipaddr6,
 257                                        false,
 258                                        action);
 259                 i40iw_if_notify(iwdev, netdev, local_ipaddr6, false,
 260                                 (action == I40IW_ARP_ADD) ? true : false);
 261                 break;
 262         default:
 263                 break;
 264         }
 265         return NOTIFY_DONE;
 266 }
 267
 268 /**
 269  * i40iw_net_event - system notifier for netevents
 270  * @notfier: not used
 271  * @event: event for notifier
 272  * @ptr: neighbor
 273  */
 274 int i40iw_net_event(struct notifier_block *notifier, unsigned long event, void *ptr)
 275 {
 276         struct neighbour *neigh = ptr;
 277         struct i40iw_device *iwdev;
 278         struct i40iw_handler *iwhdl;
 279         __be32 *p;
 280         u32 local_ipaddr[4];
 281
 282         switch (event) {
 283         case NETEVENT_NEIGH_UPDATE:
 284                 iwhdl = i40iw_find_netdev((struct net_device *)neigh->dev);
 285                 if (!iwhdl)
 286                         return NOTIFY_DONE;
 287                 iwdev = &iwhdl->device;
 288                 if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
 289                         return NOTIFY_DONE;
 290                 p = (__be32 *)neigh->primary_key;
 291                 i40iw_copy_ip_ntohl(local_ipaddr, p);
 292                 if (neigh->nud_state & NUD_VALID) {
 293                         i40iw_manage_arp_cache(iwdev,
 294                                                neigh->ha,
 295                                                local_ipaddr,
 296                                                false,
 297                                                I40IW_ARP_ADD);
 298
 299                 } else {
 300                         i40iw_manage_arp_cache(iwdev,
 301                                                neigh->ha,
 302                                                local_ipaddr,
 303                                                false,
 304                                                I40IW_ARP_DELETE);
 305                 }
 306                 break;
 307         default:
 308                 break;
 309         }
 310         return NOTIFY_DONE;
 311 }
 312
 313 /**
 314  * i40iw_netdevice_event - system notifier for netdev events
 315  * @notfier: not used
 316  * @event: event for notifier
 317  * @ptr: netdev
 318  */
 319 int i40iw_netdevice_event(struct notifier_block *notifier,
 320                           unsigned long event,
 321                           void *ptr)
 322 {
 323         struct net_device *event_netdev;
 324         struct net_device *netdev;
 325         struct i40iw_device *iwdev;
 326         struct i40iw_handler *hdl;
 327
 328         event_netdev = netdev_notifier_info_to_dev(ptr);
 329
 330         hdl = i40iw_find_netdev(event_netdev);
 331         if (!hdl)
 332                 return NOTIFY_DONE;
 333
 334         iwdev = &hdl->device;
 335         if (iwdev->init_state < RDMA_DEV_REGISTERED || iwdev->closing)
 336                 return NOTIFY_DONE;
 337
 338         netdev = iwdev->ldev->netdev;
 339         if (netdev != event_netdev)
 340                 return NOTIFY_DONE;
 341
 342         iwdev->iw_status = 1;
 343
 344         switch (event) {
 345         case NETDEV_DOWN:
 346                 iwdev->iw_status = 0;
 347                 /* Fall through */
 348         case NETDEV_UP:
 349                 i40iw_port_ibevent(iwdev);
 350                 break;
 351         default:
 352                 break;
 353         }
 354         return NOTIFY_DONE;
 355 }
 356
 357 /**
 358  * i40iw_get_cqp_request - get cqp struct
 359  * @cqp: device cqp ptr
 360  * @wait: cqp to be used in wait mode
 361  */
 362 struct i40iw_cqp_request *i40iw_get_cqp_request(struct i40iw_cqp *cqp, bool wait)
 363 {
 364         struct i40iw_cqp_request *cqp_request = NULL;
 365         unsigned long flags;
 366
 367         spin_lock_irqsave(&cqp->req_lock, flags);
 368         if (!list_empty(&cqp->cqp_avail_reqs)) {
 369                 cqp_request = list_entry(cqp->cqp_avail_reqs.next,
 370                                          struct i40iw_cqp_request, list);
 371                 list_del_init(&cqp_request->list);
 372         }
 373         spin_unlock_irqrestore(&cqp->req_lock, flags);
 374         if (!cqp_request) {
 375                 cqp_request = kzalloc(sizeof(*cqp_request), GFP_ATOMIC);
 376                 if (cqp_request) {
 377                         cqp_request->dynamic = true;
 378                         INIT_LIST_HEAD(&cqp_request->list);
 379                         init_waitqueue_head(&cqp_request->waitq);
 380                 }
 381         }
 382         if (!cqp_request) {
 383                 i40iw_pr_err("CQP Request Fail: No Memory");
 384                 return NULL;
 385         }
 386
 387         if (wait) {
 388                 atomic_set(&cqp_request->refcount, 2);
 389                 cqp_request->waiting = true;
 390         } else {
 391                 atomic_set(&cqp_request->refcount, 1);
 392         }
 393         return cqp_request;
 394 }
 395
 396 /**
 397  * i40iw_free_cqp_request - free cqp request
 398  * @cqp: cqp ptr
 399  * @cqp_request: to be put back in cqp list
 400  */
 401 void i40iw_free_cqp_request(struct i40iw_cqp *cqp, struct i40iw_cqp_request *cqp_request)
 402 {
 403         struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
 404         unsigned long flags;
 405
 406         if (cqp_request->dynamic) {
 407                 kfree(cqp_request);
 408         } else {
 409                 cqp_request->request_done = false;
 410                 cqp_request->callback_fcn = NULL;
 411                 cqp_request->waiting = false;
 412
 413                 spin_lock_irqsave(&cqp->req_lock, flags);
 414                 list_add_tail(&cqp_request->list, &cqp->cqp_avail_reqs);
 415                 spin_unlock_irqrestore(&cqp->req_lock, flags);
 416         }
 417         wake_up(&iwdev->close_wq);
 418 }
 419
 420 /**
 421  * i40iw_put_cqp_request - dec ref count and free if 0
 422  * @cqp: cqp ptr
 423  * @cqp_request: to be put back in cqp list
 424  */
 425 void i40iw_put_cqp_request(struct i40iw_cqp *cqp,
 426                            struct i40iw_cqp_request *cqp_request)
 427 {
 428         if (atomic_dec_and_test(&cqp_request->refcount))
 429                 i40iw_free_cqp_request(cqp, cqp_request);
 430 }
 431
 432 /**
 433  * i40iw_free_pending_cqp_request -free pending cqp request objs
 434  * @cqp: cqp ptr
 435  * @cqp_request: to be put back in cqp list
 436  */
 437 static void i40iw_free_pending_cqp_request(struct i40iw_cqp *cqp,
 438                                            struct i40iw_cqp_request *cqp_request)
 439 {
 440         struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
 441
 442         if (cqp_request->waiting) {
 443                 cqp_request->compl_info.error = true;
 444                 cqp_request->request_done = true;
 445                 wake_up(&cqp_request->waitq);
 446         }
 447         i40iw_put_cqp_request(cqp, cqp_request);
 448         wait_event_timeout(iwdev->close_wq,
 449                            !atomic_read(&cqp_request->refcount),
 450                            1000);
 451 }
 452
 453 /**
 454  * i40iw_cleanup_pending_cqp_op - clean-up cqp with no completions
 455  * @iwdev: iwarp device
 456  */
 457 void i40iw_cleanup_pending_cqp_op(struct i40iw_device *iwdev)
 458 {
 459         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 460         struct i40iw_cqp *cqp = &iwdev->cqp;
 461         struct i40iw_cqp_request *cqp_request = NULL;
 462         struct cqp_commands_info *pcmdinfo = NULL;
 463         u32 i, pending_work, wqe_idx;
 464
 465         pending_work = I40IW_RING_WORK_AVAILABLE(cqp->sc_cqp.sq_ring);
 466         wqe_idx = I40IW_RING_GETCURRENT_TAIL(cqp->sc_cqp.sq_ring);
 467         for (i = 0; i < pending_work; i++) {
 468                 cqp_request = (struct i40iw_cqp_request *)(unsigned long)cqp->scratch_array[wqe_idx];
 469                 if (cqp_request)
 470                         i40iw_free_pending_cqp_request(cqp, cqp_request);
 471                 wqe_idx = (wqe_idx + 1) % I40IW_RING_GETSIZE(cqp->sc_cqp.sq_ring);
 472         }
 473
 474         while (!list_empty(&dev->cqp_cmd_head)) {
 475                 pcmdinfo = (struct cqp_commands_info *)i40iw_remove_head(&dev->cqp_cmd_head);
 476                 cqp_request = container_of(pcmdinfo, struct i40iw_cqp_request, info);
 477                 if (cqp_request)
 478                         i40iw_free_pending_cqp_request(cqp, cqp_request);
 479         }
 480 }
 481
 482 /**
 483  * i40iw_free_qp - callback after destroy cqp completes
 484  * @cqp_request: cqp request for destroy qp
 485  * @num: not used
 486  */
 487 static void i40iw_free_qp(struct i40iw_cqp_request *cqp_request, u32 num)
 488 {
 489         struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)cqp_request->param;
 490         struct i40iw_qp *iwqp = (struct i40iw_qp *)qp->back_qp;
 491         struct i40iw_device *iwdev;
 492         u32 qp_num = iwqp->ibqp.qp_num;
 493
 494         iwdev = iwqp->iwdev;
 495
 496         i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
 497         i40iw_free_qp_resources(iwdev, iwqp, qp_num);
 498         i40iw_rem_devusecount(iwdev);
 499 }
 500
 501 /**
 502  * i40iw_wait_event - wait for completion
 503  * @iwdev: iwarp device
 504  * @cqp_request: cqp request to wait
 505  */
 506 static int i40iw_wait_event(struct i40iw_device *iwdev,
 507                             struct i40iw_cqp_request *cqp_request)
 508 {
 509         struct cqp_commands_info *info = &cqp_request->info;
 510         struct i40iw_cqp *iwcqp = &iwdev->cqp;
 511         struct i40iw_cqp_timeout cqp_timeout;
 512         bool cqp_error = false;
 513         int err_code = 0;
 514         memset(&cqp_timeout, 0, sizeof(cqp_timeout));
 515         cqp_timeout.compl_cqp_cmds = iwdev->sc_dev.cqp_cmd_stats[OP_COMPLETED_COMMANDS];
 516         do {
 517                 if (wait_event_timeout(cqp_request->waitq,
 518                                        cqp_request->request_done, CQP_COMPL_WAIT_TIME))
 519                         break;
 520
 521                 i40iw_check_cqp_progress(&cqp_timeout, &iwdev->sc_dev);
 522
 523                 if (cqp_timeout.count < CQP_TIMEOUT_THRESHOLD)
 524                         continue;
 525
 526                 i40iw_pr_err("error cqp command 0x%x timed out", info->cqp_cmd);
 527                 err_code = -ETIME;
 528                 if (!iwdev->reset) {
 529                         iwdev->reset = true;
 530                         i40iw_request_reset(iwdev);
 531                 }
 532                 goto done;
 533         } while (1);
 534         cqp_error = cqp_request->compl_info.error;
 535         if (cqp_error) {
 536                 i40iw_pr_err("error cqp command 0x%x completion maj = 0x%x min=0x%x\n",
 537                              info->cqp_cmd, cqp_request->compl_info.maj_err_code,
 538                              cqp_request->compl_info.min_err_code);
 539                 err_code = -EPROTO;
 540                 goto done;
 541         }
 542 done:
 543         i40iw_put_cqp_request(iwcqp, cqp_request);
 544         return err_code;
 545 }
 546
 547 /**
 548  * i40iw_handle_cqp_op - process cqp command
 549  * @iwdev: iwarp device
 550  * @cqp_request: cqp request to process
 551  */
 552 enum i40iw_status_code i40iw_handle_cqp_op(struct i40iw_device *iwdev,
 553                                            struct i40iw_cqp_request
 554                                            *cqp_request)
 555 {
 556         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 557         enum i40iw_status_code status;
 558         struct cqp_commands_info *info = &cqp_request->info;
 559         int err_code = 0;
 560
 561         if (iwdev->reset) {
 562                 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
 563                 return I40IW_ERR_CQP_COMPL_ERROR;
 564         }
 565
 566         status = i40iw_process_cqp_cmd(dev, info);
 567         if (status) {
 568                 i40iw_pr_err("error cqp command 0x%x failed\n", info->cqp_cmd);
 569                 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
 570                 return status;
 571         }
 572         if (cqp_request->waiting)
 573                 err_code = i40iw_wait_event(iwdev, cqp_request);
 574         if (err_code)
 575                 status = I40IW_ERR_CQP_COMPL_ERROR;
 576         return status;
 577 }
 578
 579 /**
 580  * i40iw_add_devusecount - add dev refcount
 581  * @iwdev: dev for refcount
 582  */
 583 void i40iw_add_devusecount(struct i40iw_device *iwdev)
 584 {
 585         atomic64_inc(&iwdev->use_count);
 586 }
 587
 588 /**
 589  * i40iw_rem_devusecount - decrement refcount for dev
 590  * @iwdev: device
 591  */
 592 void i40iw_rem_devusecount(struct i40iw_device *iwdev)
 593 {
 594         if (!atomic64_dec_and_test(&iwdev->use_count))
 595                 return;
 596         wake_up(&iwdev->close_wq);
 597 }
 598
 599 /**
 600  * i40iw_add_pdusecount - add pd refcount
 601  * @iwpd: pd for refcount
 602  */
 603 void i40iw_add_pdusecount(struct i40iw_pd *iwpd)
 604 {
 605         atomic_inc(&iwpd->usecount);
 606 }
 607
 608 /**
 609  * i40iw_rem_pdusecount - decrement refcount for pd and free if 0
 610  * @iwpd: pd for refcount
 611  * @iwdev: iwarp device
 612  */
 613 void i40iw_rem_pdusecount(struct i40iw_pd *iwpd, struct i40iw_device *iwdev)
 614 {
 615         if (!atomic_dec_and_test(&iwpd->usecount))
 616                 return;
 617         i40iw_free_resource(iwdev, iwdev->allocated_pds, iwpd->sc_pd.pd_id);
 618 }
 619
 620 /**
 621  * i40iw_add_ref - add refcount for qp
 622  * @ibqp: iqarp qp
 623  */
 624 void i40iw_add_ref(struct ib_qp *ibqp)
 625 {
 626         struct i40iw_qp *iwqp = (struct i40iw_qp *)ibqp;
 627
 628         atomic_inc(&iwqp->refcount);
 629 }
 630
 631 /**
 632  * i40iw_rem_ref - rem refcount for qp and free if 0
 633  * @ibqp: iqarp qp
 634  */
 635 void i40iw_rem_ref(struct ib_qp *ibqp)
 636 {
 637         struct i40iw_qp *iwqp;
 638         enum i40iw_status_code status;
 639         struct i40iw_cqp_request *cqp_request;
 640         struct cqp_commands_info *cqp_info;
 641         struct i40iw_device *iwdev;
 642         u32 qp_num;
 643         unsigned long flags;
 644
 645         iwqp = to_iwqp(ibqp);
 646         iwdev = iwqp->iwdev;
 647         spin_lock_irqsave(&iwdev->qptable_lock, flags);
 648         if (!atomic_dec_and_test(&iwqp->refcount)) {
 649                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 650                 return;
 651         }
 652
 653         qp_num = iwqp->ibqp.qp_num;
 654         iwdev->qp_table[qp_num] = NULL;
 655         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 656         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 657         if (!cqp_request)
 658                 return;
 659
 660         cqp_request->callback_fcn = i40iw_free_qp;
 661         cqp_request->param = (void *)&iwqp->sc_qp;
 662         cqp_info = &cqp_request->info;
 663         cqp_info->cqp_cmd = OP_QP_DESTROY;
 664         cqp_info->post_sq = 1;
 665         cqp_info->in.u.qp_destroy.qp = &iwqp->sc_qp;
 666         cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
 667         cqp_info->in.u.qp_destroy.remove_hash_idx = true;
 668         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 669         if (!status)
 670                 return;
 671
 672         i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
 673         i40iw_free_qp_resources(iwdev, iwqp, qp_num);
 674         i40iw_rem_devusecount(iwdev);
 675 }
 676
 677 /**
 678  * i40iw_get_qp - get qp address
 679  * @device: iwarp device
 680  * @qpn: qp number
 681  */
 682 struct ib_qp *i40iw_get_qp(struct ib_device *device, int qpn)
 683 {
 684         struct i40iw_device *iwdev = to_iwdev(device);
 685
 686         if ((qpn < IW_FIRST_QPN) || (qpn >= iwdev->max_qp))
 687                 return NULL;
 688
 689         return &iwdev->qp_table[qpn]->ibqp;
 690 }
 691
 692 /**
 693  * i40iw_debug_buf - print debug msg and buffer is mask set
 694  * @dev: hardware control device structure
 695  * @mask: mask to compare if to print debug buffer
 696  * @buf: points buffer addr
 697  * @size: saize of buffer to print
 698  */
 699 void i40iw_debug_buf(struct i40iw_sc_dev *dev,
 700                      enum i40iw_debug_flag mask,
 701                      char *desc,
 702                      u64 *buf,
 703                      u32 size)
 704 {
 705         u32 i;
 706
 707         if (!(dev->debug_mask & mask))
 708                 return;
 709         i40iw_debug(dev, mask, "%s\n", desc);
 710         i40iw_debug(dev, mask, "starting address virt=%p phy=%llxh\n", buf,
 711                     (unsigned long long)virt_to_phys(buf));
 712
 713         for (i = 0; i < size; i += 8)
 714                 i40iw_debug(dev, mask, "index %03d val: %016llx\n", i, buf[i / 8]);
 715 }
 716
 717 /**
 718  * i40iw_get_hw_addr - return hw addr
 719  * @par: points to shared dev
 720  */
 721 u8 __iomem *i40iw_get_hw_addr(void *par)
 722 {
 723         struct i40iw_sc_dev *dev = (struct i40iw_sc_dev *)par;
 724
 725         return dev->hw->hw_addr;
 726 }
 727
 728 /**
 729  * i40iw_remove_head - return head entry and remove from list
 730  * @list: list for entry
 731  */
 732 void *i40iw_remove_head(struct list_head *list)
 733 {
 734         struct list_head *entry;
 735
 736         if (list_empty(list))
 737                 return NULL;
 738
 739         entry = (void *)list->next;
 740         list_del(entry);
 741         return (void *)entry;
 742 }
 743
 744 /**
 745  * i40iw_allocate_dma_mem - Memory alloc helper fn
 746  * @hw:   pointer to the HW structure
 747  * @mem:  ptr to mem struct to fill out
 748  * @size: size of memory requested
 749  * @alignment: what to align the allocation to
 750  */
 751 enum i40iw_status_code i40iw_allocate_dma_mem(struct i40iw_hw *hw,
 752                                               struct i40iw_dma_mem *mem,
 753                                               u64 size,
 754                                               u32 alignment)
 755 {
 756         struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 757
 758         if (!mem)
 759                 return I40IW_ERR_PARAM;
 760         mem->size = ALIGN(size, alignment);
 761         mem->va = dma_alloc_coherent(&pcidev->dev, mem->size,
 762                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
 763         if (!mem->va)
 764                 return I40IW_ERR_NO_MEMORY;
 765         return 0;
 766 }
 767
 768 /**
 769  * i40iw_free_dma_mem - Memory free helper fn
 770  * @hw:   pointer to the HW structure
 771  * @mem:  ptr to mem struct to free
 772  */
 773 void i40iw_free_dma_mem(struct i40iw_hw *hw, struct i40iw_dma_mem *mem)
 774 {
 775         struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 776
 777         if (!mem || !mem->va)
 778                 return;
 779
 780         dma_free_coherent(&pcidev->dev, mem->size,
 781                           mem->va, (dma_addr_t)mem->pa);
 782         mem->va = NULL;
 783 }
 784
 785 /**
 786  * i40iw_allocate_virt_mem - virtual memory alloc helper fn
 787  * @hw:   pointer to the HW structure
 788  * @mem:  ptr to mem struct to fill out
 789  * @size: size of memory requested
 790  */
 791 enum i40iw_status_code i40iw_allocate_virt_mem(struct i40iw_hw *hw,
 792                                                struct i40iw_virt_mem *mem,
 793                                                u32 size)
 794 {
 795         if (!mem)
 796                 return I40IW_ERR_PARAM;
 797
 798         mem->size = size;
 799         mem->va = kzalloc(size, GFP_KERNEL);
 800
 801         if (mem->va)
 802                 return 0;
 803         else
 804                 return I40IW_ERR_NO_MEMORY;
 805 }
 806
 807 /**
 808  * i40iw_free_virt_mem - virtual memory free helper fn
 809  * @hw:   pointer to the HW structure
 810  * @mem:  ptr to mem struct to free
 811  */
 812 enum i40iw_status_code i40iw_free_virt_mem(struct i40iw_hw *hw,
 813                                            struct i40iw_virt_mem *mem)
 814 {
 815         if (!mem)
 816                 return I40IW_ERR_PARAM;
 817         /*
 818          * mem->va points to the parent of mem, so both mem and mem->va
 819          * can not be touched once mem->va is freed
 820          */
 821         kfree(mem->va);
 822         return 0;
 823 }
 824
 825 /**
 826  * i40iw_cqp_sds_cmd - create cqp command for sd
 827  * @dev: hardware control device structure
 828  * @sd_info: information  for sd cqp
 829  *
 830  */
 831 enum i40iw_status_code i40iw_cqp_sds_cmd(struct i40iw_sc_dev *dev,
 832                                          struct i40iw_update_sds_info *sdinfo)
 833 {
 834         enum i40iw_status_code status;
 835         struct i40iw_cqp_request *cqp_request;
 836         struct cqp_commands_info *cqp_info;
 837         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 838
 839         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 840         if (!cqp_request)
 841                 return I40IW_ERR_NO_MEMORY;
 842         cqp_info = &cqp_request->info;
 843         memcpy(&cqp_info->in.u.update_pe_sds.info, sdinfo,
 844                sizeof(cqp_info->in.u.update_pe_sds.info));
 845         cqp_info->cqp_cmd = OP_UPDATE_PE_SDS;
 846         cqp_info->post_sq = 1;
 847         cqp_info->in.u.update_pe_sds.dev = dev;
 848         cqp_info->in.u.update_pe_sds.scratch = (uintptr_t)cqp_request;
 849         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 850         if (status)
 851                 i40iw_pr_err("CQP-OP Update SD's fail");
 852         return status;
 853 }
 854
 855 /**
 856  * i40iw_qp_suspend_resume - cqp command for suspend/resume
 857  * @dev: hardware control device structure
 858  * @qp: hardware control qp
 859  * @suspend: flag if suspend or resume
 860  */
 861 void i40iw_qp_suspend_resume(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp, bool suspend)
 862 {
 863         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 864         struct i40iw_cqp_request *cqp_request;
 865         struct i40iw_sc_cqp *cqp = dev->cqp;
 866         struct cqp_commands_info *cqp_info;
 867         enum i40iw_status_code status;
 868
 869         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 870         if (!cqp_request)
 871                 return;
 872
 873         cqp_info = &cqp_request->info;
 874         cqp_info->cqp_cmd = (suspend) ? OP_SUSPEND : OP_RESUME;
 875         cqp_info->in.u.suspend_resume.cqp = cqp;
 876         cqp_info->in.u.suspend_resume.qp = qp;
 877         cqp_info->in.u.suspend_resume.scratch = (uintptr_t)cqp_request;
 878         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 879         if (status)
 880                 i40iw_pr_err("CQP-OP QP Suspend/Resume fail");
 881 }
 882
 883 /**
 884  * i40iw_term_modify_qp - modify qp for term message
 885  * @qp: hardware control qp
 886  * @next_state: qp's next state
 887  * @term: terminate code
 888  * @term_len: length
 889  */
 890 void i40iw_term_modify_qp(struct i40iw_sc_qp *qp, u8 next_state, u8 term, u8 term_len)
 891 {
 892         struct i40iw_qp *iwqp;
 893
 894         iwqp = (struct i40iw_qp *)qp->back_qp;
 895         i40iw_next_iw_state(iwqp, next_state, 0, term, term_len);
 896 };
 897
 898 /**
 899  * i40iw_terminate_done - after terminate is completed
 900  * @qp: hardware control qp
 901  * @timeout_occurred: indicates if terminate timer expired
 902  */
 903 void i40iw_terminate_done(struct i40iw_sc_qp *qp, int timeout_occurred)
 904 {
 905         struct i40iw_qp *iwqp;
 906         u32 next_iwarp_state = I40IW_QP_STATE_ERROR;
 907         u8 hte = 0;
 908         bool first_time;
 909         unsigned long flags;
 910
 911         iwqp = (struct i40iw_qp *)qp->back_qp;
 912         spin_lock_irqsave(&iwqp->lock, flags);
 913         if (iwqp->hte_added) {
 914                 iwqp->hte_added = 0;
 915                 hte = 1;
 916         }
 917         first_time = !(qp->term_flags & I40IW_TERM_DONE);
 918         qp->term_flags |= I40IW_TERM_DONE;
 919         spin_unlock_irqrestore(&iwqp->lock, flags);
 920         if (first_time) {
 921                 if (!timeout_occurred)
 922                         i40iw_terminate_del_timer(qp);
 923                 else
 924                         next_iwarp_state = I40IW_QP_STATE_CLOSING;
 925
 926                 i40iw_next_iw_state(iwqp, next_iwarp_state, hte, 0, 0);
 927                 i40iw_cm_disconn(iwqp);
 928         }
 929 }
 930
 931 /**
 932  * i40iw_terminate_imeout - timeout happened
 933  * @context: points to iwarp qp
 934  */
 935 static void i40iw_terminate_timeout(struct timer_list *t)
 936 {
 937         struct i40iw_qp *iwqp = from_timer(iwqp, t, terminate_timer);
 938         struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)&iwqp->sc_qp;
 939
 940         i40iw_terminate_done(qp, 1);
 941         i40iw_rem_ref(&iwqp->ibqp);
 942 }
 943
 944 /**
 945  * i40iw_terminate_start_timer - start terminate timeout
 946  * @qp: hardware control qp
 947  */
 948 void i40iw_terminate_start_timer(struct i40iw_sc_qp *qp)
 949 {
 950         struct i40iw_qp *iwqp;
 951
 952         iwqp = (struct i40iw_qp *)qp->back_qp;
 953         i40iw_add_ref(&iwqp->ibqp);
 954         timer_setup(&iwqp->terminate_timer, i40iw_terminate_timeout, 0);
 955         iwqp->terminate_timer.expires = jiffies + HZ;
 956         add_timer(&iwqp->terminate_timer);
 957 }
 958
 959 /**
 960  * i40iw_terminate_del_timer - delete terminate timeout
 961  * @qp: hardware control qp
 962  */
 963 void i40iw_terminate_del_timer(struct i40iw_sc_qp *qp)
 964 {
 965         struct i40iw_qp *iwqp;
 966
 967         iwqp = (struct i40iw_qp *)qp->back_qp;
 968         if (del_timer(&iwqp->terminate_timer))
 969                 i40iw_rem_ref(&iwqp->ibqp);
 970 }
 971
 972 /**
 973  * i40iw_cqp_generic_worker - generic worker for cqp
 974  * @work: work pointer
 975  */
 976 static void i40iw_cqp_generic_worker(struct work_struct *work)
 977 {
 978         struct i40iw_virtchnl_work_info *work_info =
 979             &((struct virtchnl_work *)work)->work_info;
 980
 981         if (work_info->worker_vf_dev)
 982                 work_info->callback_fcn(work_info->worker_vf_dev);
 983 }
 984
 985 /**
 986  * i40iw_cqp_spawn_worker - spawn worket thread
 987  * @iwdev: device struct pointer
 988  * @work_info: work request info
 989  * @iw_vf_idx: virtual function index
 990  */
 991 void i40iw_cqp_spawn_worker(struct i40iw_sc_dev *dev,
 992                             struct i40iw_virtchnl_work_info *work_info,
 993                             u32 iw_vf_idx)
 994 {
 995         struct virtchnl_work *work;
 996         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 997
 998         work = &iwdev->virtchnl_w[iw_vf_idx];
 999         memcpy(&work->work_info, work_info, sizeof(*work_info));
1000         INIT_WORK(&work->work, i40iw_cqp_generic_worker);
1001         queue_work(iwdev->virtchnl_wq, &work->work);
1002 }
1003
1004 /**
1005  * i40iw_cqp_manage_hmc_fcn_worker -
1006  * @work: work pointer for hmc info
1007  */
1008 static void i40iw_cqp_manage_hmc_fcn_worker(struct work_struct *work)
1009 {
1010         struct i40iw_cqp_request *cqp_request =
1011             ((struct virtchnl_work *)work)->cqp_request;
1012         struct i40iw_ccq_cqe_info ccq_cqe_info;
1013         struct i40iw_hmc_fcn_info *hmcfcninfo =
1014                         &cqp_request->info.in.u.manage_hmc_pm.info;
1015         struct i40iw_device *iwdev =
1016             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->back_dev;
1017
1018         ccq_cqe_info.cqp = NULL;
1019         ccq_cqe_info.maj_err_code = cqp_request->compl_info.maj_err_code;
1020         ccq_cqe_info.min_err_code = cqp_request->compl_info.min_err_code;
1021         ccq_cqe_info.op_code = cqp_request->compl_info.op_code;
1022         ccq_cqe_info.op_ret_val = cqp_request->compl_info.op_ret_val;
1023         ccq_cqe_info.scratch = 0;
1024         ccq_cqe_info.error = cqp_request->compl_info.error;
1025         hmcfcninfo->callback_fcn(cqp_request->info.in.u.manage_hmc_pm.dev,
1026                                  hmcfcninfo->cqp_callback_param, &ccq_cqe_info);
1027         i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
1028 }
1029
1030 /**
1031  * i40iw_cqp_manage_hmc_fcn_callback - called function after cqp completion
1032  * @cqp_request: cqp request info struct for hmc fun
1033  * @unused: unused param of callback
1034  */
1035 static void i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request *cqp_request,
1036                                               u32 unused)
1037 {
1038         struct virtchnl_work *work;
1039         struct i40iw_hmc_fcn_info *hmcfcninfo =
1040             &cqp_request->info.in.u.manage_hmc_pm.info;
1041         struct i40iw_device *iwdev =
1042             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->
1043             back_dev;
1044
1045         if (hmcfcninfo && hmcfcninfo->callback_fcn) {
1046                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s1\n", __func__);
1047                 atomic_inc(&cqp_request->refcount);
1048                 work = &iwdev->virtchnl_w[hmcfcninfo->iw_vf_idx];
1049                 work->cqp_request = cqp_request;
1050                 INIT_WORK(&work->work, i40iw_cqp_manage_hmc_fcn_worker);
1051                 queue_work(iwdev->virtchnl_wq, &work->work);
1052                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s2\n", __func__);
1053         } else {
1054                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s: Something wrong\n", __func__);
1055         }
1056 }
1057
1058 /**
1059  * i40iw_cqp_manage_hmc_fcn_cmd - issue cqp command to manage hmc
1060  * @dev: hardware control device structure
1061  * @hmcfcninfo: info for hmc
1062  */
1063 enum i40iw_status_code i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev *dev,
1064                                                     struct i40iw_hmc_fcn_info *hmcfcninfo)
1065 {
1066         enum i40iw_status_code status;
1067         struct i40iw_cqp_request *cqp_request;
1068         struct cqp_commands_info *cqp_info;
1069         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1070
1071         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s\n", __func__);
1072         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
1073         if (!cqp_request)
1074                 return I40IW_ERR_NO_MEMORY;
1075         cqp_info = &cqp_request->info;
1076         cqp_request->callback_fcn = i40iw_cqp_manage_hmc_fcn_callback;
1077         cqp_request->param = hmcfcninfo;
1078         memcpy(&cqp_info->in.u.manage_hmc_pm.info, hmcfcninfo,
1079                sizeof(*hmcfcninfo));
1080         cqp_info->in.u.manage_hmc_pm.dev = dev;
1081         cqp_info->cqp_cmd = OP_MANAGE_HMC_PM_FUNC_TABLE;
1082         cqp_info->post_sq = 1;
1083         cqp_info->in.u.manage_hmc_pm.scratch = (uintptr_t)cqp_request;
1084         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1085         if (status)
1086                 i40iw_pr_err("CQP-OP Manage HMC fail");
1087         return status;
1088 }
1089
1090 /**
1091  * i40iw_cqp_query_fpm_values_cmd - send cqp command for fpm
1092  * @iwdev: function device struct
1093  * @values_mem: buffer for fpm
1094  * @hmc_fn_id: function id for fpm
1095  */
1096 enum i40iw_status_code i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev *dev,
1097                                                       struct i40iw_dma_mem *values_mem,
1098                                                       u8 hmc_fn_id)
1099 {
1100         enum i40iw_status_code status;
1101         struct i40iw_cqp_request *cqp_request;
1102         struct cqp_commands_info *cqp_info;
1103         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1104
1105         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1106         if (!cqp_request)
1107                 return I40IW_ERR_NO_MEMORY;
1108         cqp_info = &cqp_request->info;
1109         cqp_request->param = NULL;
1110         cqp_info->in.u.query_fpm_values.cqp = dev->cqp;
1111         cqp_info->in.u.query_fpm_values.fpm_values_pa = values_mem->pa;
1112         cqp_info->in.u.query_fpm_values.fpm_values_va = values_mem->va;
1113         cqp_info->in.u.query_fpm_values.hmc_fn_id = hmc_fn_id;
1114         cqp_info->cqp_cmd = OP_QUERY_FPM_VALUES;
1115         cqp_info->post_sq = 1;
1116         cqp_info->in.u.query_fpm_values.scratch = (uintptr_t)cqp_request;
1117         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1118         if (status)
1119                 i40iw_pr_err("CQP-OP Query FPM fail");
1120         return status;
1121 }
1122
1123 /**
1124  * i40iw_cqp_commit_fpm_values_cmd - commit fpm values in hw
1125  * @dev: hardware control device structure
1126  * @values_mem: buffer with fpm values
1127  * @hmc_fn_id: function id for fpm
1128  */
1129 enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
1130                                                        struct i40iw_dma_mem *values_mem,
1131                                                        u8 hmc_fn_id)
1132 {
1133         enum i40iw_status_code status;
1134         struct i40iw_cqp_request *cqp_request;
1135         struct cqp_commands_info *cqp_info;
1136         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1137
1138         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1139         if (!cqp_request)
1140                 return I40IW_ERR_NO_MEMORY;
1141         cqp_info = &cqp_request->info;
1142         cqp_request->param = NULL;
1143         cqp_info->in.u.commit_fpm_values.cqp = dev->cqp;
1144         cqp_info->in.u.commit_fpm_values.fpm_values_pa = values_mem->pa;
1145         cqp_info->in.u.commit_fpm_values.fpm_values_va = values_mem->va;
1146         cqp_info->in.u.commit_fpm_values.hmc_fn_id = hmc_fn_id;
1147         cqp_info->cqp_cmd = OP_COMMIT_FPM_VALUES;
1148         cqp_info->post_sq = 1;
1149         cqp_info->in.u.commit_fpm_values.scratch = (uintptr_t)cqp_request;
1150         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1151         if (status)
1152                 i40iw_pr_err("CQP-OP Commit FPM fail");
1153         return status;
1154 }
1155
1156 /**
1157  * i40iw_vf_wait_vchnl_resp - wait for channel msg
1158  * @iwdev: function's device struct
1159  */
1160 enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
1161 {
1162         struct i40iw_device *iwdev = dev->back_dev;
1163         int timeout_ret;
1164
1165         i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
1166                     __func__, __LINE__, dev, iwdev);
1167
1168         atomic_set(&iwdev->vchnl_msgs, 2);
1169         timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
1170                                          (atomic_read(&iwdev->vchnl_msgs) == 1),
1171                                          I40IW_VCHNL_EVENT_TIMEOUT);
1172         atomic_dec(&iwdev->vchnl_msgs);
1173         if (!timeout_ret) {
1174                 i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
1175                 atomic_set(&iwdev->vchnl_msgs, 0);
1176                 dev->vchnl_up = false;
1177                 return I40IW_ERR_TIMEOUT;
1178         }
1179         wake_up(&dev->vf_reqs);
1180         return 0;
1181 }
1182
1183 /**
1184  * i40iw_cqp_cq_create_cmd - create a cq for the cqp
1185  * @dev: device pointer
1186  * @cq: pointer to created cq
1187  */
1188 enum i40iw_status_code i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev *dev,
1189                                                struct i40iw_sc_cq *cq)
1190 {
1191         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1192         struct i40iw_cqp *iwcqp = &iwdev->cqp;
1193         struct i40iw_cqp_request *cqp_request;
1194         struct cqp_commands_info *cqp_info;
1195         enum i40iw_status_code status;
1196
1197         cqp_request = i40iw_get_cqp_request(iwcqp, true);
1198         if (!cqp_request)
1199                 return I40IW_ERR_NO_MEMORY;
1200
1201         cqp_info = &cqp_request->info;
1202         cqp_info->cqp_cmd = OP_CQ_CREATE;
1203         cqp_info->post_sq = 1;
1204         cqp_info->in.u.cq_create.cq = cq;
1205         cqp_info->in.u.cq_create.scratch = (uintptr_t)cqp_request;
1206         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1207         if (status)
1208                 i40iw_pr_err("CQP-OP Create QP fail");
1209
1210         return status;
1211 }
1212
1213 /**
1214  * i40iw_cqp_qp_create_cmd - create a qp for the cqp
1215  * @dev: device pointer
1216  * @qp: pointer to created qp
1217  */
1218 enum i40iw_status_code i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev *dev,
1219                                                struct i40iw_sc_qp *qp)
1220 {
1221         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1222         struct i40iw_cqp *iwcqp = &iwdev->cqp;
1223         struct i40iw_cqp_request *cqp_request;
1224         struct cqp_commands_info *cqp_info;
1225         struct i40iw_create_qp_info *qp_info;
1226         enum i40iw_status_code status;
1227
1228         cqp_request = i40iw_get_cqp_request(iwcqp, true);
1229         if (!cqp_request)
1230                 return I40IW_ERR_NO_MEMORY;
1231
1232         cqp_info = &cqp_request->info;
1233         qp_info = &cqp_request->info.in.u.qp_create.info;
1234
1235         memset(qp_info, 0, sizeof(*qp_info));
1236
1237         qp_info->cq_num_valid = true;
1238         qp_info->next_iwarp_state = I40IW_QP_STATE_RTS;
1239
1240         cqp_info->cqp_cmd = OP_QP_CREATE;
1241         cqp_info->post_sq = 1;
1242         cqp_info->in.u.qp_create.qp = qp;
1243         cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
1244         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1245         if (status)
1246                 i40iw_pr_err("CQP-OP QP create fail");
1247         return status;
1248 }
1249
1250 /**
1251  * i40iw_cqp_cq_destroy_cmd - destroy the cqp cq
1252  * @dev: device pointer
1253  * @cq: pointer to cq
1254  */
1255 void i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_cq *cq)
1256 {
1257         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1258
1259         i40iw_cq_wq_destroy(iwdev, cq);
1260 }
1261
1262 /**
1263  * i40iw_cqp_qp_destroy_cmd - destroy the cqp
1264  * @dev: device pointer
1265  * @qp: pointer to qp
1266  */
1267 void i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1268 {
1269         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1270         struct i40iw_cqp *iwcqp = &iwdev->cqp;
1271         struct i40iw_cqp_request *cqp_request;
1272         struct cqp_commands_info *cqp_info;
1273         enum i40iw_status_code status;
1274
1275         cqp_request = i40iw_get_cqp_request(iwcqp, true);
1276         if (!cqp_request)
1277                 return;
1278
1279         cqp_info = &cqp_request->info;
1280         memset(cqp_info, 0, sizeof(*cqp_info));
1281
1282         cqp_info->cqp_cmd = OP_QP_DESTROY;
1283         cqp_info->post_sq = 1;
1284         cqp_info->in.u.qp_destroy.qp = qp;
1285         cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
1286         cqp_info->in.u.qp_destroy.remove_hash_idx = true;
1287         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1288         if (status)
1289                 i40iw_pr_err("CQP QP_DESTROY fail");
1290 }
1291
1292
1293 /**
1294  * i40iw_ieq_mpa_crc_ae - generate AE for crc error
1295  * @dev: hardware control device structure
1296  * @qp: hardware control qp
1297  */
1298 void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1299 {
1300         struct i40iw_gen_ae_info info;
1301         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1302
1303         i40iw_debug(dev, I40IW_DEBUG_AEQ, "%s entered\n", __func__);
1304         info.ae_code = I40IW_AE_LLP_RECEIVED_MPA_CRC_ERROR;
1305         info.ae_source = I40IW_AE_SOURCE_RQ;
1306         i40iw_gen_ae(iwdev, qp, &info, false);
1307 }
1308
1309 /**
1310  * i40iw_init_hash_desc - initialize hash for crc calculation
1311  * @desc: cryption type
1312  */
1313 enum i40iw_status_code i40iw_init_hash_desc(struct shash_desc **desc)
1314 {
1315         struct crypto_shash *tfm;
1316         struct shash_desc *tdesc;
1317
1318         tfm = crypto_alloc_shash("crc32c", 0, 0);
1319         if (IS_ERR(tfm))
1320                 return I40IW_ERR_MPA_CRC;
1321
1322         tdesc = kzalloc(sizeof(*tdesc) + crypto_shash_descsize(tfm),
1323                         GFP_KERNEL);
1324         if (!tdesc) {
1325                 crypto_free_shash(tfm);
1326                 return I40IW_ERR_MPA_CRC;
1327         }
1328         tdesc->tfm = tfm;
1329         *desc = tdesc;
1330
1331         return 0;
1332 }
1333
1334 /**
1335  * i40iw_free_hash_desc - free hash desc
1336  * @desc: to be freed
1337  */
1338 void i40iw_free_hash_desc(struct shash_desc *desc)
1339 {
1340         if (desc) {
1341                 crypto_free_shash(desc->tfm);
1342                 kfree(desc);
1343         }
1344 }
1345
1346 /**
1347  * i40iw_alloc_query_fpm_buf - allocate buffer for fpm
1348  * @dev: hardware control device structure
1349  * @mem: buffer ptr for fpm to be allocated
1350  * @return: memory allocation status
1351  */
1352 enum i40iw_status_code i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev *dev,
1353                                                  struct i40iw_dma_mem *mem)
1354 {
1355         enum i40iw_status_code status;
1356         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1357
1358         status = i40iw_obj_aligned_mem(iwdev, mem, I40IW_QUERY_FPM_BUF_SIZE,
1359                                        I40IW_FPM_QUERY_BUF_ALIGNMENT_MASK);
1360         return status;
1361 }
1362
1363 /**
1364  * i40iw_ieq_check_mpacrc - check if mpa crc is OK
1365  * @desc: desc for hash
1366  * @addr: address of buffer for crc
1367  * @length: length of buffer
1368  * @value: value to be compared
1369  */
1370 enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc,
1371                                               void *addr,
1372                                               u32 length,
1373                                               u32 value)
1374 {
1375         u32 crc = 0;
1376         int ret;
1377         enum i40iw_status_code ret_code = 0;
1378
1379         crypto_shash_init(desc);
1380         ret = crypto_shash_update(desc, addr, length);
1381         if (!ret)
1382                 crypto_shash_final(desc, (u8 *)&crc);
1383         if (crc != value) {
1384                 i40iw_pr_err("mpa crc check fail\n");
1385                 ret_code = I40IW_ERR_MPA_CRC;
1386         }
1387         return ret_code;
1388 }
1389
1390 /**
1391  * i40iw_ieq_get_qp - get qp based on quad in puda buffer
1392  * @dev: hardware control device structure
1393  * @buf: receive puda buffer on exception q
1394  */
1395 struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev,
1396                                      struct i40iw_puda_buf *buf)
1397 {
1398         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1399         struct i40iw_qp *iwqp;
1400         struct i40iw_cm_node *cm_node;
1401         u32 loc_addr[4], rem_addr[4];
1402         u16 loc_port, rem_port;
1403         struct ipv6hdr *ip6h;
1404         struct iphdr *iph = (struct iphdr *)buf->iph;
1405         struct tcphdr *tcph = (struct tcphdr *)buf->tcph;
1406
1407         if (iph->version == 4) {
1408                 memset(loc_addr, 0, sizeof(loc_addr));
1409                 loc_addr[0] = ntohl(iph->daddr);
1410                 memset(rem_addr, 0, sizeof(rem_addr));
1411                 rem_addr[0] = ntohl(iph->saddr);
1412         } else {
1413                 ip6h = (struct ipv6hdr *)buf->iph;
1414                 i40iw_copy_ip_ntohl(loc_addr, ip6h->daddr.in6_u.u6_addr32);
1415                 i40iw_copy_ip_ntohl(rem_addr, ip6h->saddr.in6_u.u6_addr32);
1416         }
1417         loc_port = ntohs(tcph->dest);
1418         rem_port = ntohs(tcph->source);
1419
1420         cm_node = i40iw_find_node(&iwdev->cm_core, rem_port, rem_addr, loc_port,
1421                                   loc_addr, false, true);
1422         if (!cm_node)
1423                 return NULL;
1424         iwqp = cm_node->iwqp;
1425         return &iwqp->sc_qp;
1426 }
1427
1428 /**
1429  * i40iw_ieq_update_tcpip_info - update tcpip in the buffer
1430  * @buf: puda to update
1431  * @length: length of buffer
1432  * @seqnum: seq number for tcp
1433  */
1434 void i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf *buf, u16 length, u32 seqnum)
1435 {
1436         struct tcphdr *tcph;
1437         struct iphdr *iph;
1438         u16 iphlen;
1439         u16 packetsize;
1440         u8 *addr = (u8 *)buf->mem.va;
1441
1442         iphlen = (buf->ipv4) ? 20 : 40;
1443         iph = (struct iphdr *)(addr + buf->maclen);
1444         tcph = (struct tcphdr *)(addr + buf->maclen + iphlen);
1445         packetsize = length + buf->tcphlen + iphlen;
1446
1447         iph->tot_len = htons(packetsize);
1448         tcph->seq = htonl(seqnum);
1449 }
1450
1451 /**
1452  * i40iw_puda_get_tcpip_info - get tcpip info from puda buffer
1453  * @info: to get information
1454  * @buf: puda buffer
1455  */
1456 enum i40iw_status_code i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info *info,
1457                                                  struct i40iw_puda_buf *buf)
1458 {
1459         struct iphdr *iph;
1460         struct ipv6hdr *ip6h;
1461         struct tcphdr *tcph;
1462         u16 iphlen;
1463         u16 pkt_len;
1464         u8 *mem = (u8 *)buf->mem.va;
1465         struct ethhdr *ethh = (struct ethhdr *)buf->mem.va;
1466
1467         if (ethh->h_proto == htons(0x8100)) {
1468                 info->vlan_valid = true;
1469                 buf->vlan_id = ntohs(((struct vlan_ethhdr *)ethh)->h_vlan_TCI) & VLAN_VID_MASK;
1470         }
1471         buf->maclen = (info->vlan_valid) ? 18 : 14;
1472         iphlen = (info->l3proto) ? 40 : 20;
1473         buf->ipv4 = (info->l3proto) ? false : true;
1474         buf->iph = mem + buf->maclen;
1475         iph = (struct iphdr *)buf->iph;
1476
1477         buf->tcph = buf->iph + iphlen;
1478         tcph = (struct tcphdr *)buf->tcph;
1479
1480         if (buf->ipv4) {
1481                 pkt_len = ntohs(iph->tot_len);
1482         } else {
1483                 ip6h = (struct ipv6hdr *)buf->iph;
1484                 pkt_len = ntohs(ip6h->payload_len) + iphlen;
1485         }
1486
1487         buf->totallen = pkt_len + buf->maclen;
1488
1489         if (info->payload_len < buf->totallen) {
1490                 i40iw_pr_err("payload_len = 0x%x totallen expected0x%x\n",
1491                              info->payload_len, buf->totallen);
1492                 return I40IW_ERR_INVALID_SIZE;
1493         }
1494
1495         buf->tcphlen = (tcph->doff) << 2;
1496         buf->datalen = pkt_len - iphlen - buf->tcphlen;
1497         buf->data = (buf->datalen) ? buf->tcph + buf->tcphlen : NULL;
1498         buf->hdrlen = buf->maclen + iphlen + buf->tcphlen;
1499         buf->seqnum = ntohl(tcph->seq);
1500         return 0;
1501 }
1502
1503 /**
1504  * i40iw_hw_stats_timeout - Stats timer-handler which updates all HW stats
1505  * @vsi: pointer to the vsi structure
1506  */
1507 static void i40iw_hw_stats_timeout(struct timer_list *t)
1508 {
1509         struct i40iw_vsi_pestat *pf_devstat = from_timer(pf_devstat, t,
1510                                                        stats_timer);
1511         struct i40iw_sc_vsi *sc_vsi = pf_devstat->vsi;
1512         struct i40iw_sc_dev *pf_dev = sc_vsi->dev;
1513         struct i40iw_vsi_pestat *vf_devstat = NULL;
1514         u16 iw_vf_idx;
1515         unsigned long flags;
1516
1517         /*PF*/
1518         i40iw_hw_stats_read_all(pf_devstat, &pf_devstat->hw_stats);
1519
1520         for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
1521                 spin_lock_irqsave(&pf_devstat->lock, flags);
1522                 if (pf_dev->vf_dev[iw_vf_idx]) {
1523                         if (pf_dev->vf_dev[iw_vf_idx]->stats_initialized) {
1524                                 vf_devstat = &pf_dev->vf_dev[iw_vf_idx]->pestat;
1525                                 i40iw_hw_stats_read_all(vf_devstat, &vf_devstat->hw_stats);
1526                         }
1527                 }
1528                 spin_unlock_irqrestore(&pf_devstat->lock, flags);
1529         }
1530
1531         mod_timer(&pf_devstat->stats_timer,
1532                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1533 }
1534
1535 /**
1536  * i40iw_hw_stats_start_timer - Start periodic stats timer
1537  * @vsi: pointer to the vsi structure
1538  */
1539 void i40iw_hw_stats_start_timer(struct i40iw_sc_vsi *vsi)
1540 {
1541         struct i40iw_vsi_pestat *devstat = vsi->pestat;
1542
1543         timer_setup(&devstat->stats_timer, i40iw_hw_stats_timeout, 0);
1544         mod_timer(&devstat->stats_timer,
1545                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1546 }
1547
1548 /**
1549  * i40iw_hw_stats_stop_timer - Delete periodic stats timer
1550  * @vsi: pointer to the vsi structure
1551  */
1552 void i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi *vsi)
1553 {
1554         struct i40iw_vsi_pestat *devstat = vsi->pestat;
1555
1556         del_timer_sync(&devstat->stats_timer);
1557 }