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