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