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         kfree(iwpd);
 615 }
 616
 617 /**
 618  * i40iw_add_ref - add refcount for qp
 619  * @ibqp: iqarp qp
 620  */
 621 void i40iw_add_ref(struct ib_qp *ibqp)
 622 {
 623         struct i40iw_qp *iwqp = (struct i40iw_qp *)ibqp;
 624
 625         atomic_inc(&iwqp->refcount);
 626 }
 627
 628 /**
 629  * i40iw_rem_ref - rem refcount for qp and free if 0
 630  * @ibqp: iqarp qp
 631  */
 632 void i40iw_rem_ref(struct ib_qp *ibqp)
 633 {
 634         struct i40iw_qp *iwqp;
 635         enum i40iw_status_code status;
 636         struct i40iw_cqp_request *cqp_request;
 637         struct cqp_commands_info *cqp_info;
 638         struct i40iw_device *iwdev;
 639         u32 qp_num;
 640         unsigned long flags;
 641
 642         iwqp = to_iwqp(ibqp);
 643         iwdev = iwqp->iwdev;
 644         spin_lock_irqsave(&iwdev->qptable_lock, flags);
 645         if (!atomic_dec_and_test(&iwqp->refcount)) {
 646                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 647                 return;
 648         }
 649
 650         qp_num = iwqp->ibqp.qp_num;
 651         iwdev->qp_table[qp_num] = NULL;
 652         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 653         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 654         if (!cqp_request)
 655                 return;
 656
 657         cqp_request->callback_fcn = i40iw_free_qp;
 658         cqp_request->param = (void *)&iwqp->sc_qp;
 659         cqp_info = &cqp_request->info;
 660         cqp_info->cqp_cmd = OP_QP_DESTROY;
 661         cqp_info->post_sq = 1;
 662         cqp_info->in.u.qp_destroy.qp = &iwqp->sc_qp;
 663         cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
 664         cqp_info->in.u.qp_destroy.remove_hash_idx = true;
 665         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 666         if (!status)
 667                 return;
 668
 669         i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
 670         i40iw_free_qp_resources(iwdev, iwqp, qp_num);
 671         i40iw_rem_devusecount(iwdev);
 672 }
 673
 674 /**
 675  * i40iw_get_qp - get qp address
 676  * @device: iwarp device
 677  * @qpn: qp number
 678  */
 679 struct ib_qp *i40iw_get_qp(struct ib_device *device, int qpn)
 680 {
 681         struct i40iw_device *iwdev = to_iwdev(device);
 682
 683         if ((qpn < IW_FIRST_QPN) || (qpn >= iwdev->max_qp))
 684                 return NULL;
 685
 686         return &iwdev->qp_table[qpn]->ibqp;
 687 }
 688
 689 /**
 690  * i40iw_debug_buf - print debug msg and buffer is mask set
 691  * @dev: hardware control device structure
 692  * @mask: mask to compare if to print debug buffer
 693  * @buf: points buffer addr
 694  * @size: saize of buffer to print
 695  */
 696 void i40iw_debug_buf(struct i40iw_sc_dev *dev,
 697                      enum i40iw_debug_flag mask,
 698                      char *desc,
 699                      u64 *buf,
 700                      u32 size)
 701 {
 702         u32 i;
 703
 704         if (!(dev->debug_mask & mask))
 705                 return;
 706         i40iw_debug(dev, mask, "%s\n", desc);
 707         i40iw_debug(dev, mask, "starting address virt=%p phy=%llxh\n", buf,
 708                     (unsigned long long)virt_to_phys(buf));
 709
 710         for (i = 0; i < size; i += 8)
 711                 i40iw_debug(dev, mask, "index %03d val: %016llx\n", i, buf[i / 8]);
 712 }
 713
 714 /**
 715  * i40iw_get_hw_addr - return hw addr
 716  * @par: points to shared dev
 717  */
 718 u8 __iomem *i40iw_get_hw_addr(void *par)
 719 {
 720         struct i40iw_sc_dev *dev = (struct i40iw_sc_dev *)par;
 721
 722         return dev->hw->hw_addr;
 723 }
 724
 725 /**
 726  * i40iw_remove_head - return head entry and remove from list
 727  * @list: list for entry
 728  */
 729 void *i40iw_remove_head(struct list_head *list)
 730 {
 731         struct list_head *entry;
 732
 733         if (list_empty(list))
 734                 return NULL;
 735
 736         entry = (void *)list->next;
 737         list_del(entry);
 738         return (void *)entry;
 739 }
 740
 741 /**
 742  * i40iw_allocate_dma_mem - Memory alloc helper fn
 743  * @hw:   pointer to the HW structure
 744  * @mem:  ptr to mem struct to fill out
 745  * @size: size of memory requested
 746  * @alignment: what to align the allocation to
 747  */
 748 enum i40iw_status_code i40iw_allocate_dma_mem(struct i40iw_hw *hw,
 749                                               struct i40iw_dma_mem *mem,
 750                                               u64 size,
 751                                               u32 alignment)
 752 {
 753         struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 754
 755         if (!mem)
 756                 return I40IW_ERR_PARAM;
 757         mem->size = ALIGN(size, alignment);
 758         mem->va = dma_zalloc_coherent(&pcidev->dev, mem->size,
 759                                       (dma_addr_t *)&mem->pa, GFP_KERNEL);
 760         if (!mem->va)
 761                 return I40IW_ERR_NO_MEMORY;
 762         return 0;
 763 }
 764
 765 /**
 766  * i40iw_free_dma_mem - Memory free helper fn
 767  * @hw:   pointer to the HW structure
 768  * @mem:  ptr to mem struct to free
 769  */
 770 void i40iw_free_dma_mem(struct i40iw_hw *hw, struct i40iw_dma_mem *mem)
 771 {
 772         struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 773
 774         if (!mem || !mem->va)
 775                 return;
 776
 777         dma_free_coherent(&pcidev->dev, mem->size,
 778                           mem->va, (dma_addr_t)mem->pa);
 779         mem->va = NULL;
 780 }
 781
 782 /**
 783  * i40iw_allocate_virt_mem - virtual memory alloc helper fn
 784  * @hw:   pointer to the HW structure
 785  * @mem:  ptr to mem struct to fill out
 786  * @size: size of memory requested
 787  */
 788 enum i40iw_status_code i40iw_allocate_virt_mem(struct i40iw_hw *hw,
 789                                                struct i40iw_virt_mem *mem,
 790                                                u32 size)
 791 {
 792         if (!mem)
 793                 return I40IW_ERR_PARAM;
 794
 795         mem->size = size;
 796         mem->va = kzalloc(size, GFP_KERNEL);
 797
 798         if (mem->va)
 799                 return 0;
 800         else
 801                 return I40IW_ERR_NO_MEMORY;
 802 }
 803
 804 /**
 805  * i40iw_free_virt_mem - virtual memory free helper fn
 806  * @hw:   pointer to the HW structure
 807  * @mem:  ptr to mem struct to free
 808  */
 809 enum i40iw_status_code i40iw_free_virt_mem(struct i40iw_hw *hw,
 810                                            struct i40iw_virt_mem *mem)
 811 {
 812         if (!mem)
 813                 return I40IW_ERR_PARAM;
 814         /*
 815          * mem->va points to the parent of mem, so both mem and mem->va
 816          * can not be touched once mem->va is freed
 817          */
 818         kfree(mem->va);
 819         return 0;
 820 }
 821
 822 /**
 823  * i40iw_cqp_sds_cmd - create cqp command for sd
 824  * @dev: hardware control device structure
 825  * @sd_info: information  for sd cqp
 826  *
 827  */
 828 enum i40iw_status_code i40iw_cqp_sds_cmd(struct i40iw_sc_dev *dev,
 829                                          struct i40iw_update_sds_info *sdinfo)
 830 {
 831         enum i40iw_status_code status;
 832         struct i40iw_cqp_request *cqp_request;
 833         struct cqp_commands_info *cqp_info;
 834         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 835
 836         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 837         if (!cqp_request)
 838                 return I40IW_ERR_NO_MEMORY;
 839         cqp_info = &cqp_request->info;
 840         memcpy(&cqp_info->in.u.update_pe_sds.info, sdinfo,
 841                sizeof(cqp_info->in.u.update_pe_sds.info));
 842         cqp_info->cqp_cmd = OP_UPDATE_PE_SDS;
 843         cqp_info->post_sq = 1;
 844         cqp_info->in.u.update_pe_sds.dev = dev;
 845         cqp_info->in.u.update_pe_sds.scratch = (uintptr_t)cqp_request;
 846         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 847         if (status)
 848                 i40iw_pr_err("CQP-OP Update SD's fail");
 849         return status;
 850 }
 851
 852 /**
 853  * i40iw_qp_suspend_resume - cqp command for suspend/resume
 854  * @dev: hardware control device structure
 855  * @qp: hardware control qp
 856  * @suspend: flag if suspend or resume
 857  */
 858 void i40iw_qp_suspend_resume(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp, bool suspend)
 859 {
 860         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 861         struct i40iw_cqp_request *cqp_request;
 862         struct i40iw_sc_cqp *cqp = dev->cqp;
 863         struct cqp_commands_info *cqp_info;
 864         enum i40iw_status_code status;
 865
 866         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 867         if (!cqp_request)
 868                 return;
 869
 870         cqp_info = &cqp_request->info;
 871         cqp_info->cqp_cmd = (suspend) ? OP_SUSPEND : OP_RESUME;
 872         cqp_info->in.u.suspend_resume.cqp = cqp;
 873         cqp_info->in.u.suspend_resume.qp = qp;
 874         cqp_info->in.u.suspend_resume.scratch = (uintptr_t)cqp_request;
 875         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 876         if (status)
 877                 i40iw_pr_err("CQP-OP QP Suspend/Resume fail");
 878 }
 879
 880 /**
 881  * i40iw_term_modify_qp - modify qp for term message
 882  * @qp: hardware control qp
 883  * @next_state: qp's next state
 884  * @term: terminate code
 885  * @term_len: length
 886  */
 887 void i40iw_term_modify_qp(struct i40iw_sc_qp *qp, u8 next_state, u8 term, u8 term_len)
 888 {
 889         struct i40iw_qp *iwqp;
 890
 891         iwqp = (struct i40iw_qp *)qp->back_qp;
 892         i40iw_next_iw_state(iwqp, next_state, 0, term, term_len);
 893 };
 894
 895 /**
 896  * i40iw_terminate_done - after terminate is completed
 897  * @qp: hardware control qp
 898  * @timeout_occurred: indicates if terminate timer expired
 899  */
 900 void i40iw_terminate_done(struct i40iw_sc_qp *qp, int timeout_occurred)
 901 {
 902         struct i40iw_qp *iwqp;
 903         u32 next_iwarp_state = I40IW_QP_STATE_ERROR;
 904         u8 hte = 0;
 905         bool first_time;
 906         unsigned long flags;
 907
 908         iwqp = (struct i40iw_qp *)qp->back_qp;
 909         spin_lock_irqsave(&iwqp->lock, flags);
 910         if (iwqp->hte_added) {
 911                 iwqp->hte_added = 0;
 912                 hte = 1;
 913         }
 914         first_time = !(qp->term_flags & I40IW_TERM_DONE);
 915         qp->term_flags |= I40IW_TERM_DONE;
 916         spin_unlock_irqrestore(&iwqp->lock, flags);
 917         if (first_time) {
 918                 if (!timeout_occurred)
 919                         i40iw_terminate_del_timer(qp);
 920                 else
 921                         next_iwarp_state = I40IW_QP_STATE_CLOSING;
 922
 923                 i40iw_next_iw_state(iwqp, next_iwarp_state, hte, 0, 0);
 924                 i40iw_cm_disconn(iwqp);
 925         }
 926 }
 927
 928 /**
 929  * i40iw_terminate_imeout - timeout happened
 930  * @context: points to iwarp qp
 931  */
 932 static void i40iw_terminate_timeout(struct timer_list *t)
 933 {
 934         struct i40iw_qp *iwqp = from_timer(iwqp, t, terminate_timer);
 935         struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)&iwqp->sc_qp;
 936
 937         i40iw_terminate_done(qp, 1);
 938         i40iw_rem_ref(&iwqp->ibqp);
 939 }
 940
 941 /**
 942  * i40iw_terminate_start_timer - start terminate timeout
 943  * @qp: hardware control qp
 944  */
 945 void i40iw_terminate_start_timer(struct i40iw_sc_qp *qp)
 946 {
 947         struct i40iw_qp *iwqp;
 948
 949         iwqp = (struct i40iw_qp *)qp->back_qp;
 950         i40iw_add_ref(&iwqp->ibqp);
 951         timer_setup(&iwqp->terminate_timer, i40iw_terminate_timeout, 0);
 952         iwqp->terminate_timer.expires = jiffies + HZ;
 953         add_timer(&iwqp->terminate_timer);
 954 }
 955
 956 /**
 957  * i40iw_terminate_del_timer - delete terminate timeout
 958  * @qp: hardware control qp
 959  */
 960 void i40iw_terminate_del_timer(struct i40iw_sc_qp *qp)
 961 {
 962         struct i40iw_qp *iwqp;
 963
 964         iwqp = (struct i40iw_qp *)qp->back_qp;
 965         if (del_timer(&iwqp->terminate_timer))
 966                 i40iw_rem_ref(&iwqp->ibqp);
 967 }
 968
 969 /**
 970  * i40iw_cqp_generic_worker - generic worker for cqp
 971  * @work: work pointer
 972  */
 973 static void i40iw_cqp_generic_worker(struct work_struct *work)
 974 {
 975         struct i40iw_virtchnl_work_info *work_info =
 976             &((struct virtchnl_work *)work)->work_info;
 977
 978         if (work_info->worker_vf_dev)
 979                 work_info->callback_fcn(work_info->worker_vf_dev);
 980 }
 981
 982 /**
 983  * i40iw_cqp_spawn_worker - spawn worket thread
 984  * @iwdev: device struct pointer
 985  * @work_info: work request info
 986  * @iw_vf_idx: virtual function index
 987  */
 988 void i40iw_cqp_spawn_worker(struct i40iw_sc_dev *dev,
 989                             struct i40iw_virtchnl_work_info *work_info,
 990                             u32 iw_vf_idx)
 991 {
 992         struct virtchnl_work *work;
 993         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 994
 995         work = &iwdev->virtchnl_w[iw_vf_idx];
 996         memcpy(&work->work_info, work_info, sizeof(*work_info));
 997         INIT_WORK(&work->work, i40iw_cqp_generic_worker);
 998         queue_work(iwdev->virtchnl_wq, &work->work);
 999 }
1000
1001 /**
1002  * i40iw_cqp_manage_hmc_fcn_worker -
1003  * @work: work pointer for hmc info
1004  */
1005 static void i40iw_cqp_manage_hmc_fcn_worker(struct work_struct *work)
1006 {
1007         struct i40iw_cqp_request *cqp_request =
1008             ((struct virtchnl_work *)work)->cqp_request;
1009         struct i40iw_ccq_cqe_info ccq_cqe_info;
1010         struct i40iw_hmc_fcn_info *hmcfcninfo =
1011                         &cqp_request->info.in.u.manage_hmc_pm.info;
1012         struct i40iw_device *iwdev =
1013             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->back_dev;
1014
1015         ccq_cqe_info.cqp = NULL;
1016         ccq_cqe_info.maj_err_code = cqp_request->compl_info.maj_err_code;
1017         ccq_cqe_info.min_err_code = cqp_request->compl_info.min_err_code;
1018         ccq_cqe_info.op_code = cqp_request->compl_info.op_code;
1019         ccq_cqe_info.op_ret_val = cqp_request->compl_info.op_ret_val;
1020         ccq_cqe_info.scratch = 0;
1021         ccq_cqe_info.error = cqp_request->compl_info.error;
1022         hmcfcninfo->callback_fcn(cqp_request->info.in.u.manage_hmc_pm.dev,
1023                                  hmcfcninfo->cqp_callback_param, &ccq_cqe_info);
1024         i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
1025 }
1026
1027 /**
1028  * i40iw_cqp_manage_hmc_fcn_callback - called function after cqp completion
1029  * @cqp_request: cqp request info struct for hmc fun
1030  * @unused: unused param of callback
1031  */
1032 static void i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request *cqp_request,
1033                                               u32 unused)
1034 {
1035         struct virtchnl_work *work;
1036         struct i40iw_hmc_fcn_info *hmcfcninfo =
1037             &cqp_request->info.in.u.manage_hmc_pm.info;
1038         struct i40iw_device *iwdev =
1039             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->
1040             back_dev;
1041
1042         if (hmcfcninfo && hmcfcninfo->callback_fcn) {
1043                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s1\n", __func__);
1044                 atomic_inc(&cqp_request->refcount);
1045                 work = &iwdev->virtchnl_w[hmcfcninfo->iw_vf_idx];
1046                 work->cqp_request = cqp_request;
1047                 INIT_WORK(&work->work, i40iw_cqp_manage_hmc_fcn_worker);
1048                 queue_work(iwdev->virtchnl_wq, &work->work);
1049                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s2\n", __func__);
1050         } else {
1051                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s: Something wrong\n", __func__);
1052         }
1053 }
1054
1055 /**
1056  * i40iw_cqp_manage_hmc_fcn_cmd - issue cqp command to manage hmc
1057  * @dev: hardware control device structure
1058  * @hmcfcninfo: info for hmc
1059  */
1060 enum i40iw_status_code i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev *dev,
1061                                                     struct i40iw_hmc_fcn_info *hmcfcninfo)
1062 {
1063         enum i40iw_status_code status;
1064         struct i40iw_cqp_request *cqp_request;
1065         struct cqp_commands_info *cqp_info;
1066         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1067
1068         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s\n", __func__);
1069         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
1070         if (!cqp_request)
1071                 return I40IW_ERR_NO_MEMORY;
1072         cqp_info = &cqp_request->info;
1073         cqp_request->callback_fcn = i40iw_cqp_manage_hmc_fcn_callback;
1074         cqp_request->param = hmcfcninfo;
1075         memcpy(&cqp_info->in.u.manage_hmc_pm.info, hmcfcninfo,
1076                sizeof(*hmcfcninfo));
1077         cqp_info->in.u.manage_hmc_pm.dev = dev;
1078         cqp_info->cqp_cmd = OP_MANAGE_HMC_PM_FUNC_TABLE;
1079         cqp_info->post_sq = 1;
1080         cqp_info->in.u.manage_hmc_pm.scratch = (uintptr_t)cqp_request;
1081         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1082         if (status)
1083                 i40iw_pr_err("CQP-OP Manage HMC fail");
1084         return status;
1085 }
1086
1087 /**
1088  * i40iw_cqp_query_fpm_values_cmd - send cqp command for fpm
1089  * @iwdev: function device struct
1090  * @values_mem: buffer for fpm
1091  * @hmc_fn_id: function id for fpm
1092  */
1093 enum i40iw_status_code i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev *dev,
1094                                                       struct i40iw_dma_mem *values_mem,
1095                                                       u8 hmc_fn_id)
1096 {
1097         enum i40iw_status_code status;
1098         struct i40iw_cqp_request *cqp_request;
1099         struct cqp_commands_info *cqp_info;
1100         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1101
1102         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1103         if (!cqp_request)
1104                 return I40IW_ERR_NO_MEMORY;
1105         cqp_info = &cqp_request->info;
1106         cqp_request->param = NULL;
1107         cqp_info->in.u.query_fpm_values.cqp = dev->cqp;
1108         cqp_info->in.u.query_fpm_values.fpm_values_pa = values_mem->pa;
1109         cqp_info->in.u.query_fpm_values.fpm_values_va = values_mem->va;
1110         cqp_info->in.u.query_fpm_values.hmc_fn_id = hmc_fn_id;
1111         cqp_info->cqp_cmd = OP_QUERY_FPM_VALUES;
1112         cqp_info->post_sq = 1;
1113         cqp_info->in.u.query_fpm_values.scratch = (uintptr_t)cqp_request;
1114         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1115         if (status)
1116                 i40iw_pr_err("CQP-OP Query FPM fail");
1117         return status;
1118 }
1119
1120 /**
1121  * i40iw_cqp_commit_fpm_values_cmd - commit fpm values in hw
1122  * @dev: hardware control device structure
1123  * @values_mem: buffer with fpm values
1124  * @hmc_fn_id: function id for fpm
1125  */
1126 enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
1127                                                        struct i40iw_dma_mem *values_mem,
1128                                                        u8 hmc_fn_id)
1129 {
1130         enum i40iw_status_code status;
1131         struct i40iw_cqp_request *cqp_request;
1132         struct cqp_commands_info *cqp_info;
1133         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1134
1135         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1136         if (!cqp_request)
1137                 return I40IW_ERR_NO_MEMORY;
1138         cqp_info = &cqp_request->info;
1139         cqp_request->param = NULL;
1140         cqp_info->in.u.commit_fpm_values.cqp = dev->cqp;
1141         cqp_info->in.u.commit_fpm_values.fpm_values_pa = values_mem->pa;
1142         cqp_info->in.u.commit_fpm_values.fpm_values_va = values_mem->va;
1143         cqp_info->in.u.commit_fpm_values.hmc_fn_id = hmc_fn_id;
1144         cqp_info->cqp_cmd = OP_COMMIT_FPM_VALUES;
1145         cqp_info->post_sq = 1;
1146         cqp_info->in.u.commit_fpm_values.scratch = (uintptr_t)cqp_request;
1147         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1148         if (status)
1149                 i40iw_pr_err("CQP-OP Commit FPM fail");
1150         return status;
1151 }
1152
1153 /**
1154  * i40iw_vf_wait_vchnl_resp - wait for channel msg
1155  * @iwdev: function's device struct
1156  */
1157 enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
1158 {
1159         struct i40iw_device *iwdev = dev->back_dev;
1160         int timeout_ret;
1161
1162         i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
1163                     __func__, __LINE__, dev, iwdev);
1164
1165         atomic_set(&iwdev->vchnl_msgs, 2);
1166         timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
1167                                          (atomic_read(&iwdev->vchnl_msgs) == 1),
1168                                          I40IW_VCHNL_EVENT_TIMEOUT);
1169         atomic_dec(&iwdev->vchnl_msgs);
1170         if (!timeout_ret) {
1171                 i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
1172                 atomic_set(&iwdev->vchnl_msgs, 0);
1173                 dev->vchnl_up = false;
1174                 return I40IW_ERR_TIMEOUT;
1175         }
1176         wake_up(&dev->vf_reqs);
1177         return 0;
1178 }
1179
1180 /**
1181  * i40iw_cqp_cq_create_cmd - create a cq for the cqp
1182  * @dev: device pointer
1183  * @cq: pointer to created cq
1184  */
1185 enum i40iw_status_code i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev *dev,
1186                                                struct i40iw_sc_cq *cq)
1187 {
1188         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1189         struct i40iw_cqp *iwcqp = &iwdev->cqp;
1190         struct i40iw_cqp_request *cqp_request;
1191         struct cqp_commands_info *cqp_info;
1192         enum i40iw_status_code status;
1193
1194         cqp_request = i40iw_get_cqp_request(iwcqp, true);
1195         if (!cqp_request)
1196                 return I40IW_ERR_NO_MEMORY;
1197
1198         cqp_info = &cqp_request->info;
1199         cqp_info->cqp_cmd = OP_CQ_CREATE;
1200         cqp_info->post_sq = 1;
1201         cqp_info->in.u.cq_create.cq = cq;
1202         cqp_info->in.u.cq_create.scratch = (uintptr_t)cqp_request;
1203         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1204         if (status)
1205                 i40iw_pr_err("CQP-OP Create QP fail");
1206
1207         return status;
1208 }
1209
1210 /**
1211  * i40iw_cqp_qp_create_cmd - create a qp for the cqp
1212  * @dev: device pointer
1213  * @qp: pointer to created qp
1214  */
1215 enum i40iw_status_code i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev *dev,
1216                                                struct i40iw_sc_qp *qp)
1217 {
1218         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1219         struct i40iw_cqp *iwcqp = &iwdev->cqp;
1220         struct i40iw_cqp_request *cqp_request;
1221         struct cqp_commands_info *cqp_info;
1222         struct i40iw_create_qp_info *qp_info;
1223         enum i40iw_status_code status;
1224
1225         cqp_request = i40iw_get_cqp_request(iwcqp, true);
1226         if (!cqp_request)
1227                 return I40IW_ERR_NO_MEMORY;
1228
1229         cqp_info = &cqp_request->info;
1230         qp_info = &cqp_request->info.in.u.qp_create.info;
1231
1232         memset(qp_info, 0, sizeof(*qp_info));
1233
1234         qp_info->cq_num_valid = true;
1235         qp_info->next_iwarp_state = I40IW_QP_STATE_RTS;
1236
1237         cqp_info->cqp_cmd = OP_QP_CREATE;
1238         cqp_info->post_sq = 1;
1239         cqp_info->in.u.qp_create.qp = qp;
1240         cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
1241         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1242         if (status)
1243                 i40iw_pr_err("CQP-OP QP create fail");
1244         return status;
1245 }
1246
1247 /**
1248  * i40iw_cqp_cq_destroy_cmd - destroy the cqp cq
1249  * @dev: device pointer
1250  * @cq: pointer to cq
1251  */
1252 void i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_cq *cq)
1253 {
1254         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1255
1256         i40iw_cq_wq_destroy(iwdev, cq);
1257 }
1258
1259 /**
1260  * i40iw_cqp_qp_destroy_cmd - destroy the cqp
1261  * @dev: device pointer
1262  * @qp: pointer to qp
1263  */
1264 void i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1265 {
1266         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1267         struct i40iw_cqp *iwcqp = &iwdev->cqp;
1268         struct i40iw_cqp_request *cqp_request;
1269         struct cqp_commands_info *cqp_info;
1270         enum i40iw_status_code status;
1271
1272         cqp_request = i40iw_get_cqp_request(iwcqp, true);
1273         if (!cqp_request)
1274                 return;
1275
1276         cqp_info = &cqp_request->info;
1277         memset(cqp_info, 0, sizeof(*cqp_info));
1278
1279         cqp_info->cqp_cmd = OP_QP_DESTROY;
1280         cqp_info->post_sq = 1;
1281         cqp_info->in.u.qp_destroy.qp = qp;
1282         cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
1283         cqp_info->in.u.qp_destroy.remove_hash_idx = true;
1284         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1285         if (status)
1286                 i40iw_pr_err("CQP QP_DESTROY fail");
1287 }
1288
1289
1290 /**
1291  * i40iw_ieq_mpa_crc_ae - generate AE for crc error
1292  * @dev: hardware control device structure
1293  * @qp: hardware control qp
1294  */
1295 void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1296 {
1297         struct i40iw_gen_ae_info info;
1298         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1299
1300         i40iw_debug(dev, I40IW_DEBUG_AEQ, "%s entered\n", __func__);
1301         info.ae_code = I40IW_AE_LLP_RECEIVED_MPA_CRC_ERROR;
1302         info.ae_source = I40IW_AE_SOURCE_RQ;
1303         i40iw_gen_ae(iwdev, qp, &info, false);
1304 }
1305
1306 /**
1307  * i40iw_init_hash_desc - initialize hash for crc calculation
1308  * @desc: cryption type
1309  */
1310 enum i40iw_status_code i40iw_init_hash_desc(struct shash_desc **desc)
1311 {
1312         struct crypto_shash *tfm;
1313         struct shash_desc *tdesc;
1314
1315         tfm = crypto_alloc_shash("crc32c", 0, 0);
1316         if (IS_ERR(tfm))
1317                 return I40IW_ERR_MPA_CRC;
1318
1319         tdesc = kzalloc(sizeof(*tdesc) + crypto_shash_descsize(tfm),
1320                         GFP_KERNEL);
1321         if (!tdesc) {
1322                 crypto_free_shash(tfm);
1323                 return I40IW_ERR_MPA_CRC;
1324         }
1325         tdesc->tfm = tfm;
1326         *desc = tdesc;
1327
1328         return 0;
1329 }
1330
1331 /**
1332  * i40iw_free_hash_desc - free hash desc
1333  * @desc: to be freed
1334  */
1335 void i40iw_free_hash_desc(struct shash_desc *desc)
1336 {
1337         if (desc) {
1338                 crypto_free_shash(desc->tfm);
1339                 kfree(desc);
1340         }
1341 }
1342
1343 /**
1344  * i40iw_alloc_query_fpm_buf - allocate buffer for fpm
1345  * @dev: hardware control device structure
1346  * @mem: buffer ptr for fpm to be allocated
1347  * @return: memory allocation status
1348  */
1349 enum i40iw_status_code i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev *dev,
1350                                                  struct i40iw_dma_mem *mem)
1351 {
1352         enum i40iw_status_code status;
1353         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1354
1355         status = i40iw_obj_aligned_mem(iwdev, mem, I40IW_QUERY_FPM_BUF_SIZE,
1356                                        I40IW_FPM_QUERY_BUF_ALIGNMENT_MASK);
1357         return status;
1358 }
1359
1360 /**
1361  * i40iw_ieq_check_mpacrc - check if mpa crc is OK
1362  * @desc: desc for hash
1363  * @addr: address of buffer for crc
1364  * @length: length of buffer
1365  * @value: value to be compared
1366  */
1367 enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc,
1368                                               void *addr,
1369                                               u32 length,
1370                                               u32 value)
1371 {
1372         u32 crc = 0;
1373         int ret;
1374         enum i40iw_status_code ret_code = 0;
1375
1376         crypto_shash_init(desc);
1377         ret = crypto_shash_update(desc, addr, length);
1378         if (!ret)
1379                 crypto_shash_final(desc, (u8 *)&crc);
1380         if (crc != value) {
1381                 i40iw_pr_err("mpa crc check fail\n");
1382                 ret_code = I40IW_ERR_MPA_CRC;
1383         }
1384         return ret_code;
1385 }
1386
1387 /**
1388  * i40iw_ieq_get_qp - get qp based on quad in puda buffer
1389  * @dev: hardware control device structure
1390  * @buf: receive puda buffer on exception q
1391  */
1392 struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev,
1393                                      struct i40iw_puda_buf *buf)
1394 {
1395         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1396         struct i40iw_qp *iwqp;
1397         struct i40iw_cm_node *cm_node;
1398         u32 loc_addr[4], rem_addr[4];
1399         u16 loc_port, rem_port;
1400         struct ipv6hdr *ip6h;
1401         struct iphdr *iph = (struct iphdr *)buf->iph;
1402         struct tcphdr *tcph = (struct tcphdr *)buf->tcph;
1403
1404         if (iph->version == 4) {
1405                 memset(loc_addr, 0, sizeof(loc_addr));
1406                 loc_addr[0] = ntohl(iph->daddr);
1407                 memset(rem_addr, 0, sizeof(rem_addr));
1408                 rem_addr[0] = ntohl(iph->saddr);
1409         } else {
1410                 ip6h = (struct ipv6hdr *)buf->iph;
1411                 i40iw_copy_ip_ntohl(loc_addr, ip6h->daddr.in6_u.u6_addr32);
1412                 i40iw_copy_ip_ntohl(rem_addr, ip6h->saddr.in6_u.u6_addr32);
1413         }
1414         loc_port = ntohs(tcph->dest);
1415         rem_port = ntohs(tcph->source);
1416
1417         cm_node = i40iw_find_node(&iwdev->cm_core, rem_port, rem_addr, loc_port,
1418                                   loc_addr, false, true);
1419         if (!cm_node)
1420                 return NULL;
1421         iwqp = cm_node->iwqp;
1422         return &iwqp->sc_qp;
1423 }
1424
1425 /**
1426  * i40iw_ieq_update_tcpip_info - update tcpip in the buffer
1427  * @buf: puda to update
1428  * @length: length of buffer
1429  * @seqnum: seq number for tcp
1430  */
1431 void i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf *buf, u16 length, u32 seqnum)
1432 {
1433         struct tcphdr *tcph;
1434         struct iphdr *iph;
1435         u16 iphlen;
1436         u16 packetsize;
1437         u8 *addr = (u8 *)buf->mem.va;
1438
1439         iphlen = (buf->ipv4) ? 20 : 40;
1440         iph = (struct iphdr *)(addr + buf->maclen);
1441         tcph = (struct tcphdr *)(addr + buf->maclen + iphlen);
1442         packetsize = length + buf->tcphlen + iphlen;
1443
1444         iph->tot_len = htons(packetsize);
1445         tcph->seq = htonl(seqnum);
1446 }
1447
1448 /**
1449  * i40iw_puda_get_tcpip_info - get tcpip info from puda buffer
1450  * @info: to get information
1451  * @buf: puda buffer
1452  */
1453 enum i40iw_status_code i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info *info,
1454                                                  struct i40iw_puda_buf *buf)
1455 {
1456         struct iphdr *iph;
1457         struct ipv6hdr *ip6h;
1458         struct tcphdr *tcph;
1459         u16 iphlen;
1460         u16 pkt_len;
1461         u8 *mem = (u8 *)buf->mem.va;
1462         struct ethhdr *ethh = (struct ethhdr *)buf->mem.va;
1463
1464         if (ethh->h_proto == htons(0x8100)) {
1465                 info->vlan_valid = true;
1466                 buf->vlan_id = ntohs(((struct vlan_ethhdr *)ethh)->h_vlan_TCI) & VLAN_VID_MASK;
1467         }
1468         buf->maclen = (info->vlan_valid) ? 18 : 14;
1469         iphlen = (info->l3proto) ? 40 : 20;
1470         buf->ipv4 = (info->l3proto) ? false : true;
1471         buf->iph = mem + buf->maclen;
1472         iph = (struct iphdr *)buf->iph;
1473
1474         buf->tcph = buf->iph + iphlen;
1475         tcph = (struct tcphdr *)buf->tcph;
1476
1477         if (buf->ipv4) {
1478                 pkt_len = ntohs(iph->tot_len);
1479         } else {
1480                 ip6h = (struct ipv6hdr *)buf->iph;
1481                 pkt_len = ntohs(ip6h->payload_len) + iphlen;
1482         }
1483
1484         buf->totallen = pkt_len + buf->maclen;
1485
1486         if (info->payload_len < buf->totallen) {
1487                 i40iw_pr_err("payload_len = 0x%x totallen expected0x%x\n",
1488                              info->payload_len, buf->totallen);
1489                 return I40IW_ERR_INVALID_SIZE;
1490         }
1491
1492         buf->tcphlen = (tcph->doff) << 2;
1493         buf->datalen = pkt_len - iphlen - buf->tcphlen;
1494         buf->data = (buf->datalen) ? buf->tcph + buf->tcphlen : NULL;
1495         buf->hdrlen = buf->maclen + iphlen + buf->tcphlen;
1496         buf->seqnum = ntohl(tcph->seq);
1497         return 0;
1498 }
1499
1500 /**
1501  * i40iw_hw_stats_timeout - Stats timer-handler which updates all HW stats
1502  * @vsi: pointer to the vsi structure
1503  */
1504 static void i40iw_hw_stats_timeout(struct timer_list *t)
1505 {
1506         struct i40iw_vsi_pestat *pf_devstat = from_timer(pf_devstat, t,
1507                                                        stats_timer);
1508         struct i40iw_sc_vsi *sc_vsi = pf_devstat->vsi;
1509         struct i40iw_sc_dev *pf_dev = sc_vsi->dev;
1510         struct i40iw_vsi_pestat *vf_devstat = NULL;
1511         u16 iw_vf_idx;
1512         unsigned long flags;
1513
1514         /*PF*/
1515         i40iw_hw_stats_read_all(pf_devstat, &pf_devstat->hw_stats);
1516
1517         for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
1518                 spin_lock_irqsave(&pf_devstat->lock, flags);
1519                 if (pf_dev->vf_dev[iw_vf_idx]) {
1520                         if (pf_dev->vf_dev[iw_vf_idx]->stats_initialized) {
1521                                 vf_devstat = &pf_dev->vf_dev[iw_vf_idx]->pestat;
1522                                 i40iw_hw_stats_read_all(vf_devstat, &vf_devstat->hw_stats);
1523                         }
1524                 }
1525                 spin_unlock_irqrestore(&pf_devstat->lock, flags);
1526         }
1527
1528         mod_timer(&pf_devstat->stats_timer,
1529                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1530 }
1531
1532 /**
1533  * i40iw_hw_stats_start_timer - Start periodic stats timer
1534  * @vsi: pointer to the vsi structure
1535  */
1536 void i40iw_hw_stats_start_timer(struct i40iw_sc_vsi *vsi)
1537 {
1538         struct i40iw_vsi_pestat *devstat = vsi->pestat;
1539
1540         timer_setup(&devstat->stats_timer, i40iw_hw_stats_timeout, 0);
1541         mod_timer(&devstat->stats_timer,
1542                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1543 }
1544
1545 /**
1546  * i40iw_hw_stats_stop_timer - Delete periodic stats timer
1547  * @vsi: pointer to the vsi structure
1548  */
1549 void i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi *vsi)
1550 {
1551         struct i40iw_vsi_pestat *devstat = vsi->pestat;
1552
1553         del_timer_sync(&devstat->stats_timer);
1554 }