drivers/infiniband/hw/i40iw/i40iw_utils.c

   1 /*******************************************************************************
   2 *
   3 * Copyright (c) 2015-2016 Intel Corporation.  All rights reserved.
   4 *
   5 * This software is available to you under a choice of one of two
   6 * licenses.  You may choose to be licensed under the terms of the GNU
   7 * General Public License (GPL) Version 2, available from the file
   8 * COPYING in the main directory of this source tree, or the
   9 * OpenFabrics.org BSD license below:
  10 *
  11 *   Redistribution and use in source and binary forms, with or
  12 *   without modification, are permitted provided that the following
  13 *   conditions are met:
  14 *
  15 *    - Redistributions of source code must retain the above
  16 *       copyright notice, this list of conditions and the following
  17 *       disclaimer.
  18 *
  19 *    - Redistributions in binary form must reproduce the above
  20 *       copyright notice, this list of conditions and the following
  21 *       disclaimer in the documentation and/or other materials
  22 *       provided with the distribution.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31 * SOFTWARE.
  32 *
  33 *******************************************************************************/
  34
  35 #include <linux/module.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/ethtool.h>
  40 #include <linux/mii.h>
  41 #include <linux/if_vlan.h>
  42 #include <linux/crc32.h>
  43 #include <linux/in.h>
  44 #include <linux/ip.h>
  45 #include <linux/tcp.h>
  46 #include <linux/init.h>
  47 #include <linux/io.h>
  48 #include <asm/irq.h>
  49 #include <asm/byteorder.h>
  50 #include <net/netevent.h>
  51 #include <net/neighbour.h>
  52 #include "i40iw.h"
  53
  54 /**
  55  * i40iw_arp_table - manage arp table
  56  * @iwdev: iwarp device
  57  * @ip_addr: ip address for device
  58  * @mac_addr: mac address ptr
  59  * @action: modify, delete or add
  60  */
  61 int i40iw_arp_table(struct i40iw_device *iwdev,
  62                     u32 *ip_addr,
  63                     bool ipv4,
  64                     u8 *mac_addr,
  65                     u32 action)
  66 {
  67         int arp_index;
  68         int err;
  69         u32 ip[4];
  70
  71         if (ipv4) {
  72                 memset(ip, 0, sizeof(ip));
  73                 ip[0] = *ip_addr;
  74         } else {
  75                 memcpy(ip, ip_addr, sizeof(ip));
  76         }
  77
  78         for (arp_index = 0; (u32)arp_index < iwdev->arp_table_size; arp_index++)
  79                 if (memcmp(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip)) == 0)
  80                         break;
  81         switch (action) {
  82         case I40IW_ARP_ADD:
  83                 if (arp_index != iwdev->arp_table_size)
  84                         return -1;
  85
  86                 arp_index = 0;
  87                 err = i40iw_alloc_resource(iwdev, iwdev->allocated_arps,
  88                                            iwdev->arp_table_size,
  89                                            (u32 *)&arp_index,
  90                                            &iwdev->next_arp_index);
  91
  92                 if (err)
  93                         return err;
  94
  95                 memcpy(iwdev->arp_table[arp_index].ip_addr, ip, sizeof(ip));
  96                 ether_addr_copy(iwdev->arp_table[arp_index].mac_addr, mac_addr);
  97                 break;
  98         case I40IW_ARP_RESOLVE:
  99                 if (arp_index == iwdev->arp_table_size)
 100                         return -1;
 101                 break;
 102         case I40IW_ARP_DELETE:
 103                 if (arp_index == iwdev->arp_table_size)
 104                         return -1;
 105                 memset(iwdev->arp_table[arp_index].ip_addr, 0,
 106                        sizeof(iwdev->arp_table[arp_index].ip_addr));
 107                 eth_zero_addr(iwdev->arp_table[arp_index].mac_addr);
 108                 i40iw_free_resource(iwdev, iwdev->allocated_arps, arp_index);
 109                 break;
 110         default:
 111                 return -1;
 112         }
 113         return arp_index;
 114 }
 115
 116 /**
 117  * i40iw_wr32 - write 32 bits to hw register
 118  * @hw: hardware information including registers
 119  * @reg: register offset
 120  * @value: vvalue to write to register
 121  */
 122 inline void i40iw_wr32(struct i40iw_hw *hw, u32 reg, u32 value)
 123 {
 124         writel(value, hw->hw_addr + reg);
 125 }
 126
 127 /**
 128  * i40iw_rd32 - read a 32 bit hw register
 129  * @hw: hardware information including registers
 130  * @reg: register offset
 131  *
 132  * Return value of register content
 133  */
 134 inline u32 i40iw_rd32(struct i40iw_hw *hw, u32 reg)
 135 {
 136         return readl(hw->hw_addr + reg);
 137 }
 138
 139 /**
 140  * i40iw_inetaddr_event - system notifier for ipv4 addr events
 141  * @notfier: not used
 142  * @event: event for notifier
 143  * @ptr: if address
 144  */
 145 int i40iw_inetaddr_event(struct notifier_block *notifier,
 146                          unsigned long event,
 147                          void *ptr)
 148 {
 149         struct in_ifaddr *ifa = ptr;
 150         struct net_device *event_netdev = ifa->ifa_dev->dev;
 151         struct net_device *netdev;
 152         struct net_device *upper_dev;
 153         struct i40iw_device *iwdev;
 154         struct i40iw_handler *hdl;
 155         u32 local_ipaddr;
 156         u32 action = I40IW_ARP_ADD;
 157
 158         hdl = i40iw_find_netdev(event_netdev);
 159         if (!hdl)
 160                 return NOTIFY_DONE;
 161
 162         iwdev = &hdl->device;
 163         if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
 164                 return NOTIFY_DONE;
 165
 166         netdev = iwdev->ldev->netdev;
 167         upper_dev = netdev_master_upper_dev_get(netdev);
 168         if (netdev != event_netdev)
 169                 return NOTIFY_DONE;
 170
 171         if (upper_dev) {
 172                 struct in_device *in;
 173
 174                 rcu_read_lock();
 175                 in = __in_dev_get_rcu(upper_dev);
 176
 177                 local_ipaddr = 0;
 178                 if (in) {
 179                         struct in_ifaddr *ifa;
 180
 181                         ifa = rcu_dereference(in->ifa_list);
 182                         if (ifa)
 183                                 local_ipaddr = ntohl(ifa->ifa_address);
 184                 }
 185
 186                 rcu_read_unlock();
 187         } else {
 188                 local_ipaddr = ntohl(ifa->ifa_address);
 189         }
 190         switch (event) {
 191         case NETDEV_DOWN:
 192                 action = I40IW_ARP_DELETE;
 193                 fallthrough;
 194         case NETDEV_UP:
 195         case NETDEV_CHANGEADDR:
 196
 197                 /* Just skip if no need to handle ARP cache */
 198                 if (!local_ipaddr)
 199                         break;
 200
 201                 i40iw_manage_arp_cache(iwdev,
 202                                        netdev->dev_addr,
 203                                        &local_ipaddr,
 204                                        true,
 205                                        action);
 206                 i40iw_if_notify(iwdev, netdev, &local_ipaddr, true,
 207                                 (action == I40IW_ARP_ADD) ? true : false);
 208                 break;
 209         default:
 210                 break;
 211         }
 212         return NOTIFY_DONE;
 213 }
 214
 215 /**
 216  * i40iw_inet6addr_event - system notifier for ipv6 addr events
 217  * @notfier: not used
 218  * @event: event for notifier
 219  * @ptr: if address
 220  */
 221 int i40iw_inet6addr_event(struct notifier_block *notifier,
 222                           unsigned long event,
 223                           void *ptr)
 224 {
 225         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 226         struct net_device *event_netdev = ifa->idev->dev;
 227         struct net_device *netdev;
 228         struct i40iw_device *iwdev;
 229         struct i40iw_handler *hdl;
 230         u32 local_ipaddr6[4];
 231         u32 action = I40IW_ARP_ADD;
 232
 233         hdl = i40iw_find_netdev(event_netdev);
 234         if (!hdl)
 235                 return NOTIFY_DONE;
 236
 237         iwdev = &hdl->device;
 238         if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
 239                 return NOTIFY_DONE;
 240
 241         netdev = iwdev->ldev->netdev;
 242         if (netdev != event_netdev)
 243                 return NOTIFY_DONE;
 244
 245         i40iw_copy_ip_ntohl(local_ipaddr6, ifa->addr.in6_u.u6_addr32);
 246         switch (event) {
 247         case NETDEV_DOWN:
 248                 action = I40IW_ARP_DELETE;
 249                 fallthrough;
 250         case NETDEV_UP:
 251         case NETDEV_CHANGEADDR:
 252                 i40iw_manage_arp_cache(iwdev,
 253                                        netdev->dev_addr,
 254                                        local_ipaddr6,
 255                                        false,
 256                                        action);
 257                 i40iw_if_notify(iwdev, netdev, local_ipaddr6, false,
 258                                 (action == I40IW_ARP_ADD) ? true : false);
 259                 break;
 260         default:
 261                 break;
 262         }
 263         return NOTIFY_DONE;
 264 }
 265
 266 /**
 267  * i40iw_net_event - system notifier for netevents
 268  * @notfier: not used
 269  * @event: event for notifier
 270  * @ptr: neighbor
 271  */
 272 int i40iw_net_event(struct notifier_block *notifier, unsigned long event, void *ptr)
 273 {
 274         struct neighbour *neigh = ptr;
 275         struct i40iw_device *iwdev;
 276         struct i40iw_handler *iwhdl;
 277         __be32 *p;
 278         u32 local_ipaddr[4];
 279
 280         switch (event) {
 281         case NETEVENT_NEIGH_UPDATE:
 282                 iwhdl = i40iw_find_netdev((struct net_device *)neigh->dev);
 283                 if (!iwhdl)
 284                         return NOTIFY_DONE;
 285                 iwdev = &iwhdl->device;
 286                 if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
 287                         return NOTIFY_DONE;
 288                 p = (__be32 *)neigh->primary_key;
 289                 i40iw_copy_ip_ntohl(local_ipaddr, p);
 290                 if (neigh->nud_state & NUD_VALID) {
 291                         i40iw_manage_arp_cache(iwdev,
 292                                                neigh->ha,
 293                                                local_ipaddr,
 294                                                false,
 295                                                I40IW_ARP_ADD);
 296
 297                 } else {
 298                         i40iw_manage_arp_cache(iwdev,
 299                                                neigh->ha,
 300                                                local_ipaddr,
 301                                                false,
 302                                                I40IW_ARP_DELETE);
 303                 }
 304                 break;
 305         default:
 306                 break;
 307         }
 308         return NOTIFY_DONE;
 309 }
 310
 311 /**
 312  * i40iw_netdevice_event - system notifier for netdev events
 313  * @notfier: not used
 314  * @event: event for notifier
 315  * @ptr: netdev
 316  */
 317 int i40iw_netdevice_event(struct notifier_block *notifier,
 318                           unsigned long event,
 319                           void *ptr)
 320 {
 321         struct net_device *event_netdev;
 322         struct net_device *netdev;
 323         struct i40iw_device *iwdev;
 324         struct i40iw_handler *hdl;
 325
 326         event_netdev = netdev_notifier_info_to_dev(ptr);
 327
 328         hdl = i40iw_find_netdev(event_netdev);
 329         if (!hdl)
 330                 return NOTIFY_DONE;
 331
 332         iwdev = &hdl->device;
 333         if (iwdev->init_state < RDMA_DEV_REGISTERED || iwdev->closing)
 334                 return NOTIFY_DONE;
 335
 336         netdev = iwdev->ldev->netdev;
 337         if (netdev != event_netdev)
 338                 return NOTIFY_DONE;
 339
 340         iwdev->iw_status = 1;
 341
 342         switch (event) {
 343         case NETDEV_DOWN:
 344                 iwdev->iw_status = 0;
 345                 fallthrough;
 346         case NETDEV_UP:
 347                 i40iw_port_ibevent(iwdev);
 348                 break;
 349         default:
 350                 break;
 351         }
 352         return NOTIFY_DONE;
 353 }
 354
 355 /**
 356  * i40iw_get_cqp_request - get cqp struct
 357  * @cqp: device cqp ptr
 358  * @wait: cqp to be used in wait mode
 359  */
 360 struct i40iw_cqp_request *i40iw_get_cqp_request(struct i40iw_cqp *cqp, bool wait)
 361 {
 362         struct i40iw_cqp_request *cqp_request = NULL;
 363         unsigned long flags;
 364
 365         spin_lock_irqsave(&cqp->req_lock, flags);
 366         if (!list_empty(&cqp->cqp_avail_reqs)) {
 367                 cqp_request = list_entry(cqp->cqp_avail_reqs.next,
 368                                          struct i40iw_cqp_request, list);
 369                 list_del_init(&cqp_request->list);
 370         }
 371         spin_unlock_irqrestore(&cqp->req_lock, flags);
 372         if (!cqp_request) {
 373                 cqp_request = kzalloc(sizeof(*cqp_request), GFP_ATOMIC);
 374                 if (cqp_request) {
 375                         cqp_request->dynamic = true;
 376                         INIT_LIST_HEAD(&cqp_request->list);
 377                         init_waitqueue_head(&cqp_request->waitq);
 378                 }
 379         }
 380         if (!cqp_request) {
 381                 i40iw_pr_err("CQP Request Fail: No Memory");
 382                 return NULL;
 383         }
 384
 385         if (wait) {
 386                 atomic_set(&cqp_request->refcount, 2);
 387                 cqp_request->waiting = true;
 388         } else {
 389                 atomic_set(&cqp_request->refcount, 1);
 390         }
 391         return cqp_request;
 392 }
 393
 394 /**
 395  * i40iw_free_cqp_request - free cqp request
 396  * @cqp: cqp ptr
 397  * @cqp_request: to be put back in cqp list
 398  */
 399 void i40iw_free_cqp_request(struct i40iw_cqp *cqp, struct i40iw_cqp_request *cqp_request)
 400 {
 401         struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
 402         unsigned long flags;
 403
 404         if (cqp_request->dynamic) {
 405                 kfree(cqp_request);
 406         } else {
 407                 cqp_request->request_done = false;
 408                 cqp_request->callback_fcn = NULL;
 409                 cqp_request->waiting = false;
 410
 411                 spin_lock_irqsave(&cqp->req_lock, flags);
 412                 list_add_tail(&cqp_request->list, &cqp->cqp_avail_reqs);
 413                 spin_unlock_irqrestore(&cqp->req_lock, flags);
 414         }
 415         wake_up(&iwdev->close_wq);
 416 }
 417
 418 /**
 419  * i40iw_put_cqp_request - dec ref count and free if 0
 420  * @cqp: cqp ptr
 421  * @cqp_request: to be put back in cqp list
 422  */
 423 void i40iw_put_cqp_request(struct i40iw_cqp *cqp,
 424                            struct i40iw_cqp_request *cqp_request)
 425 {
 426         if (atomic_dec_and_test(&cqp_request->refcount))
 427                 i40iw_free_cqp_request(cqp, cqp_request);
 428 }
 429
 430 /**
 431  * i40iw_free_pending_cqp_request -free pending cqp request objs
 432  * @cqp: cqp ptr
 433  * @cqp_request: to be put back in cqp list
 434  */
 435 static void i40iw_free_pending_cqp_request(struct i40iw_cqp *cqp,
 436                                            struct i40iw_cqp_request *cqp_request)
 437 {
 438         struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
 439
 440         if (cqp_request->waiting) {
 441                 cqp_request->compl_info.error = true;
 442                 cqp_request->request_done = true;
 443                 wake_up(&cqp_request->waitq);
 444         }
 445         i40iw_put_cqp_request(cqp, cqp_request);
 446         wait_event_timeout(iwdev->close_wq,
 447                            !atomic_read(&cqp_request->refcount),
 448                            1000);
 449 }
 450
 451 /**
 452  * i40iw_cleanup_pending_cqp_op - clean-up cqp with no completions
 453  * @iwdev: iwarp device
 454  */
 455 void i40iw_cleanup_pending_cqp_op(struct i40iw_device *iwdev)
 456 {
 457         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 458         struct i40iw_cqp *cqp = &iwdev->cqp;
 459         struct i40iw_cqp_request *cqp_request = NULL;
 460         struct cqp_commands_info *pcmdinfo = NULL;
 461         u32 i, pending_work, wqe_idx;
 462
 463         pending_work = I40IW_RING_WORK_AVAILABLE(cqp->sc_cqp.sq_ring);
 464         wqe_idx = I40IW_RING_GETCURRENT_TAIL(cqp->sc_cqp.sq_ring);
 465         for (i = 0; i < pending_work; i++) {
 466                 cqp_request = (struct i40iw_cqp_request *)(unsigned long)cqp->scratch_array[wqe_idx];
 467                 if (cqp_request)
 468                         i40iw_free_pending_cqp_request(cqp, cqp_request);
 469                 wqe_idx = (wqe_idx + 1) % I40IW_RING_GETSIZE(cqp->sc_cqp.sq_ring);
 470         }
 471
 472         while (!list_empty(&dev->cqp_cmd_head)) {
 473                 pcmdinfo = (struct cqp_commands_info *)i40iw_remove_head(&dev->cqp_cmd_head);
 474                 cqp_request = container_of(pcmdinfo, struct i40iw_cqp_request, info);
 475                 if (cqp_request)
 476                         i40iw_free_pending_cqp_request(cqp, cqp_request);
 477         }
 478 }
 479
 480 /**
 481  * i40iw_wait_event - wait for completion
 482  * @iwdev: iwarp device
 483  * @cqp_request: cqp request to wait
 484  */
 485 static int i40iw_wait_event(struct i40iw_device *iwdev,
 486                             struct i40iw_cqp_request *cqp_request)
 487 {
 488         struct cqp_commands_info *info = &cqp_request->info;
 489         struct i40iw_cqp *iwcqp = &iwdev->cqp;
 490         struct i40iw_cqp_timeout cqp_timeout;
 491         bool cqp_error = false;
 492         int err_code = 0;
 493         memset(&cqp_timeout, 0, sizeof(cqp_timeout));
 494         cqp_timeout.compl_cqp_cmds = iwdev->sc_dev.cqp_cmd_stats[OP_COMPLETED_COMMANDS];
 495         do {
 496                 if (wait_event_timeout(cqp_request->waitq,
 497                                        cqp_request->request_done, CQP_COMPL_WAIT_TIME))
 498                         break;
 499
 500                 i40iw_check_cqp_progress(&cqp_timeout, &iwdev->sc_dev);
 501
 502                 if (cqp_timeout.count < CQP_TIMEOUT_THRESHOLD)
 503                         continue;
 504
 505                 i40iw_pr_err("error cqp command 0x%x timed out", info->cqp_cmd);
 506                 err_code = -ETIME;
 507                 if (!iwdev->reset) {
 508                         iwdev->reset = true;
 509                         i40iw_request_reset(iwdev);
 510                 }
 511                 goto done;
 512         } while (1);
 513         cqp_error = cqp_request->compl_info.error;
 514         if (cqp_error) {
 515                 i40iw_pr_err("error cqp command 0x%x completion maj = 0x%x min=0x%x\n",
 516                              info->cqp_cmd, cqp_request->compl_info.maj_err_code,
 517                              cqp_request->compl_info.min_err_code);
 518                 err_code = -EPROTO;
 519                 goto done;
 520         }
 521 done:
 522         i40iw_put_cqp_request(iwcqp, cqp_request);
 523         return err_code;
 524 }
 525
 526 /**
 527  * i40iw_handle_cqp_op - process cqp command
 528  * @iwdev: iwarp device
 529  * @cqp_request: cqp request to process
 530  */
 531 enum i40iw_status_code i40iw_handle_cqp_op(struct i40iw_device *iwdev,
 532                                            struct i40iw_cqp_request
 533                                            *cqp_request)
 534 {
 535         struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 536         enum i40iw_status_code status;
 537         struct cqp_commands_info *info = &cqp_request->info;
 538         int err_code = 0;
 539
 540         if (iwdev->reset) {
 541                 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
 542                 return I40IW_ERR_CQP_COMPL_ERROR;
 543         }
 544
 545         status = i40iw_process_cqp_cmd(dev, info);
 546         if (status) {
 547                 i40iw_pr_err("error cqp command 0x%x failed\n", info->cqp_cmd);
 548                 i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
 549                 return status;
 550         }
 551         if (cqp_request->waiting)
 552                 err_code = i40iw_wait_event(iwdev, cqp_request);
 553         if (err_code)
 554                 status = I40IW_ERR_CQP_COMPL_ERROR;
 555         return status;
 556 }
 557
 558 /**
 559  * i40iw_add_devusecount - add dev refcount
 560  * @iwdev: dev for refcount
 561  */
 562 void i40iw_add_devusecount(struct i40iw_device *iwdev)
 563 {
 564         atomic64_inc(&iwdev->use_count);
 565 }
 566
 567 /**
 568  * i40iw_rem_devusecount - decrement refcount for dev
 569  * @iwdev: device
 570  */
 571 void i40iw_rem_devusecount(struct i40iw_device *iwdev)
 572 {
 573         if (!atomic64_dec_and_test(&iwdev->use_count))
 574                 return;
 575         wake_up(&iwdev->close_wq);
 576 }
 577
 578 /**
 579  * i40iw_add_pdusecount - add pd refcount
 580  * @iwpd: pd for refcount
 581  */
 582 void i40iw_add_pdusecount(struct i40iw_pd *iwpd)
 583 {
 584         atomic_inc(&iwpd->usecount);
 585 }
 586
 587 /**
 588  * i40iw_rem_pdusecount - decrement refcount for pd and free if 0
 589  * @iwpd: pd for refcount
 590  * @iwdev: iwarp device
 591  */
 592 void i40iw_rem_pdusecount(struct i40iw_pd *iwpd, struct i40iw_device *iwdev)
 593 {
 594         if (!atomic_dec_and_test(&iwpd->usecount))
 595                 return;
 596         i40iw_free_resource(iwdev, iwdev->allocated_pds, iwpd->sc_pd.pd_id);
 597 }
 598
 599 /**
 600  * i40iw_qp_add_ref - add refcount for qp
 601  * @ibqp: iqarp qp
 602  */
 603 void i40iw_qp_add_ref(struct ib_qp *ibqp)
 604 {
 605         struct i40iw_qp *iwqp = (struct i40iw_qp *)ibqp;
 606
 607         refcount_inc(&iwqp->refcount);
 608 }
 609
 610 /**
 611  * i40iw_qp_rem_ref - rem refcount for qp and free if 0
 612  * @ibqp: iqarp qp
 613  */
 614 void i40iw_qp_rem_ref(struct ib_qp *ibqp)
 615 {
 616         struct i40iw_qp *iwqp;
 617         struct i40iw_device *iwdev;
 618         u32 qp_num;
 619         unsigned long flags;
 620
 621         iwqp = to_iwqp(ibqp);
 622         iwdev = iwqp->iwdev;
 623         spin_lock_irqsave(&iwdev->qptable_lock, flags);
 624         if (!refcount_dec_and_test(&iwqp->refcount)) {
 625                 spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 626                 return;
 627         }
 628
 629         qp_num = iwqp->ibqp.qp_num;
 630         iwdev->qp_table[qp_num] = NULL;
 631         spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 632         complete(&iwqp->free_qp);
 633
 634 }
 635
 636 /**
 637  * i40iw_get_qp - get qp address
 638  * @device: iwarp device
 639  * @qpn: qp number
 640  */
 641 struct ib_qp *i40iw_get_qp(struct ib_device *device, int qpn)
 642 {
 643         struct i40iw_device *iwdev = to_iwdev(device);
 644
 645         if ((qpn < IW_FIRST_QPN) || (qpn >= iwdev->max_qp))
 646                 return NULL;
 647
 648         return &iwdev->qp_table[qpn]->ibqp;
 649 }
 650
 651 /**
 652  * i40iw_debug_buf - print debug msg and buffer is mask set
 653  * @dev: hardware control device structure
 654  * @mask: mask to compare if to print debug buffer
 655  * @buf: points buffer addr
 656  * @size: saize of buffer to print
 657  */
 658 void i40iw_debug_buf(struct i40iw_sc_dev *dev,
 659                      enum i40iw_debug_flag mask,
 660                      char *desc,
 661                      u64 *buf,
 662                      u32 size)
 663 {
 664         u32 i;
 665
 666         if (!(dev->debug_mask & mask))
 667                 return;
 668         i40iw_debug(dev, mask, "%s\n", desc);
 669         i40iw_debug(dev, mask, "starting address virt=%p phy=%llxh\n", buf,
 670                     (unsigned long long)virt_to_phys(buf));
 671
 672         for (i = 0; i < size; i += 8)
 673                 i40iw_debug(dev, mask, "index %03d val: %016llx\n", i, buf[i / 8]);
 674 }
 675
 676 /**
 677  * i40iw_get_hw_addr - return hw addr
 678  * @par: points to shared dev
 679  */
 680 u8 __iomem *i40iw_get_hw_addr(void *par)
 681 {
 682         struct i40iw_sc_dev *dev = (struct i40iw_sc_dev *)par;
 683
 684         return dev->hw->hw_addr;
 685 }
 686
 687 /**
 688  * i40iw_remove_head - return head entry and remove from list
 689  * @list: list for entry
 690  */
 691 void *i40iw_remove_head(struct list_head *list)
 692 {
 693         struct list_head *entry;
 694
 695         if (list_empty(list))
 696                 return NULL;
 697
 698         entry = (void *)list->next;
 699         list_del(entry);
 700         return (void *)entry;
 701 }
 702
 703 /**
 704  * i40iw_allocate_dma_mem - Memory alloc helper fn
 705  * @hw:   pointer to the HW structure
 706  * @mem:  ptr to mem struct to fill out
 707  * @size: size of memory requested
 708  * @alignment: what to align the allocation to
 709  */
 710 enum i40iw_status_code i40iw_allocate_dma_mem(struct i40iw_hw *hw,
 711                                               struct i40iw_dma_mem *mem,
 712                                               u64 size,
 713                                               u32 alignment)
 714 {
 715         struct pci_dev *pcidev = hw->pcidev;
 716
 717         if (!mem)
 718                 return I40IW_ERR_PARAM;
 719         mem->size = ALIGN(size, alignment);
 720         mem->va = dma_alloc_coherent(&pcidev->dev, mem->size,
 721                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
 722         if (!mem->va)
 723                 return I40IW_ERR_NO_MEMORY;
 724         return 0;
 725 }
 726
 727 /**
 728  * i40iw_free_dma_mem - Memory free helper fn
 729  * @hw:   pointer to the HW structure
 730  * @mem:  ptr to mem struct to free
 731  */
 732 void i40iw_free_dma_mem(struct i40iw_hw *hw, struct i40iw_dma_mem *mem)
 733 {
 734         struct pci_dev *pcidev = hw->pcidev;
 735
 736         if (!mem || !mem->va)
 737                 return;
 738
 739         dma_free_coherent(&pcidev->dev, mem->size,
 740                           mem->va, (dma_addr_t)mem->pa);
 741         mem->va = NULL;
 742 }
 743
 744 /**
 745  * i40iw_allocate_virt_mem - virtual memory alloc helper fn
 746  * @hw:   pointer to the HW structure
 747  * @mem:  ptr to mem struct to fill out
 748  * @size: size of memory requested
 749  */
 750 enum i40iw_status_code i40iw_allocate_virt_mem(struct i40iw_hw *hw,
 751                                                struct i40iw_virt_mem *mem,
 752                                                u32 size)
 753 {
 754         if (!mem)
 755                 return I40IW_ERR_PARAM;
 756
 757         mem->size = size;
 758         mem->va = kzalloc(size, GFP_KERNEL);
 759
 760         if (mem->va)
 761                 return 0;
 762         else
 763                 return I40IW_ERR_NO_MEMORY;
 764 }
 765
 766 /**
 767  * i40iw_free_virt_mem - virtual memory free helper fn
 768  * @hw:   pointer to the HW structure
 769  * @mem:  ptr to mem struct to free
 770  */
 771 enum i40iw_status_code i40iw_free_virt_mem(struct i40iw_hw *hw,
 772                                            struct i40iw_virt_mem *mem)
 773 {
 774         if (!mem)
 775                 return I40IW_ERR_PARAM;
 776         /*
 777          * mem->va points to the parent of mem, so both mem and mem->va
 778          * can not be touched once mem->va is freed
 779          */
 780         kfree(mem->va);
 781         return 0;
 782 }
 783
 784 /**
 785  * i40iw_cqp_sds_cmd - create cqp command for sd
 786  * @dev: hardware control device structure
 787  * @sd_info: information  for sd cqp
 788  *
 789  */
 790 enum i40iw_status_code i40iw_cqp_sds_cmd(struct i40iw_sc_dev *dev,
 791                                          struct i40iw_update_sds_info *sdinfo)
 792 {
 793         enum i40iw_status_code status;
 794         struct i40iw_cqp_request *cqp_request;
 795         struct cqp_commands_info *cqp_info;
 796         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 797
 798         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 799         if (!cqp_request)
 800                 return I40IW_ERR_NO_MEMORY;
 801         cqp_info = &cqp_request->info;
 802         memcpy(&cqp_info->in.u.update_pe_sds.info, sdinfo,
 803                sizeof(cqp_info->in.u.update_pe_sds.info));
 804         cqp_info->cqp_cmd = OP_UPDATE_PE_SDS;
 805         cqp_info->post_sq = 1;
 806         cqp_info->in.u.update_pe_sds.dev = dev;
 807         cqp_info->in.u.update_pe_sds.scratch = (uintptr_t)cqp_request;
 808         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 809         if (status)
 810                 i40iw_pr_err("CQP-OP Update SD's fail");
 811         return status;
 812 }
 813
 814 /**
 815  * i40iw_qp_suspend_resume - cqp command for suspend/resume
 816  * @dev: hardware control device structure
 817  * @qp: hardware control qp
 818  * @suspend: flag if suspend or resume
 819  */
 820 void i40iw_qp_suspend_resume(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp, bool suspend)
 821 {
 822         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 823         struct i40iw_cqp_request *cqp_request;
 824         struct i40iw_sc_cqp *cqp = dev->cqp;
 825         struct cqp_commands_info *cqp_info;
 826         enum i40iw_status_code status;
 827
 828         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 829         if (!cqp_request)
 830                 return;
 831
 832         cqp_info = &cqp_request->info;
 833         cqp_info->cqp_cmd = (suspend) ? OP_SUSPEND : OP_RESUME;
 834         cqp_info->in.u.suspend_resume.cqp = cqp;
 835         cqp_info->in.u.suspend_resume.qp = qp;
 836         cqp_info->in.u.suspend_resume.scratch = (uintptr_t)cqp_request;
 837         status = i40iw_handle_cqp_op(iwdev, cqp_request);
 838         if (status)
 839                 i40iw_pr_err("CQP-OP QP Suspend/Resume fail");
 840 }
 841
 842 /**
 843  * i40iw_term_modify_qp - modify qp for term message
 844  * @qp: hardware control qp
 845  * @next_state: qp's next state
 846  * @term: terminate code
 847  * @term_len: length
 848  */
 849 void i40iw_term_modify_qp(struct i40iw_sc_qp *qp, u8 next_state, u8 term, u8 term_len)
 850 {
 851         struct i40iw_qp *iwqp;
 852
 853         iwqp = (struct i40iw_qp *)qp->back_qp;
 854         i40iw_next_iw_state(iwqp, next_state, 0, term, term_len);
 855 };
 856
 857 /**
 858  * i40iw_terminate_done - after terminate is completed
 859  * @qp: hardware control qp
 860  * @timeout_occurred: indicates if terminate timer expired
 861  */
 862 void i40iw_terminate_done(struct i40iw_sc_qp *qp, int timeout_occurred)
 863 {
 864         struct i40iw_qp *iwqp;
 865         u32 next_iwarp_state = I40IW_QP_STATE_ERROR;
 866         u8 hte = 0;
 867         bool first_time;
 868         unsigned long flags;
 869
 870         iwqp = (struct i40iw_qp *)qp->back_qp;
 871         spin_lock_irqsave(&iwqp->lock, flags);
 872         if (iwqp->hte_added) {
 873                 iwqp->hte_added = 0;
 874                 hte = 1;
 875         }
 876         first_time = !(qp->term_flags & I40IW_TERM_DONE);
 877         qp->term_flags |= I40IW_TERM_DONE;
 878         spin_unlock_irqrestore(&iwqp->lock, flags);
 879         if (first_time) {
 880                 if (!timeout_occurred)
 881                         i40iw_terminate_del_timer(qp);
 882                 else
 883                         next_iwarp_state = I40IW_QP_STATE_CLOSING;
 884
 885                 i40iw_next_iw_state(iwqp, next_iwarp_state, hte, 0, 0);
 886                 i40iw_cm_disconn(iwqp);
 887         }
 888 }
 889
 890 /**
 891  * i40iw_terminate_imeout - timeout happened
 892  * @context: points to iwarp qp
 893  */
 894 static void i40iw_terminate_timeout(struct timer_list *t)
 895 {
 896         struct i40iw_qp *iwqp = from_timer(iwqp, t, terminate_timer);
 897         struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)&iwqp->sc_qp;
 898
 899         i40iw_terminate_done(qp, 1);
 900         i40iw_qp_rem_ref(&iwqp->ibqp);
 901 }
 902
 903 /**
 904  * i40iw_terminate_start_timer - start terminate timeout
 905  * @qp: hardware control qp
 906  */
 907 void i40iw_terminate_start_timer(struct i40iw_sc_qp *qp)
 908 {
 909         struct i40iw_qp *iwqp;
 910
 911         iwqp = (struct i40iw_qp *)qp->back_qp;
 912         i40iw_qp_add_ref(&iwqp->ibqp);
 913         timer_setup(&iwqp->terminate_timer, i40iw_terminate_timeout, 0);
 914         iwqp->terminate_timer.expires = jiffies + HZ;
 915         add_timer(&iwqp->terminate_timer);
 916 }
 917
 918 /**
 919  * i40iw_terminate_del_timer - delete terminate timeout
 920  * @qp: hardware control qp
 921  */
 922 void i40iw_terminate_del_timer(struct i40iw_sc_qp *qp)
 923 {
 924         struct i40iw_qp *iwqp;
 925
 926         iwqp = (struct i40iw_qp *)qp->back_qp;
 927         if (del_timer(&iwqp->terminate_timer))
 928                 i40iw_qp_rem_ref(&iwqp->ibqp);
 929 }
 930
 931 /**
 932  * i40iw_cqp_generic_worker - generic worker for cqp
 933  * @work: work pointer
 934  */
 935 static void i40iw_cqp_generic_worker(struct work_struct *work)
 936 {
 937         struct i40iw_virtchnl_work_info *work_info =
 938             &((struct virtchnl_work *)work)->work_info;
 939
 940         if (work_info->worker_vf_dev)
 941                 work_info->callback_fcn(work_info->worker_vf_dev);
 942 }
 943
 944 /**
 945  * i40iw_cqp_spawn_worker - spawn worket thread
 946  * @iwdev: device struct pointer
 947  * @work_info: work request info
 948  * @iw_vf_idx: virtual function index
 949  */
 950 void i40iw_cqp_spawn_worker(struct i40iw_sc_dev *dev,
 951                             struct i40iw_virtchnl_work_info *work_info,
 952                             u32 iw_vf_idx)
 953 {
 954         struct virtchnl_work *work;
 955         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 956
 957         work = &iwdev->virtchnl_w[iw_vf_idx];
 958         memcpy(&work->work_info, work_info, sizeof(*work_info));
 959         INIT_WORK(&work->work, i40iw_cqp_generic_worker);
 960         queue_work(iwdev->virtchnl_wq, &work->work);
 961 }
 962
 963 /**
 964  * i40iw_cqp_manage_hmc_fcn_worker -
 965  * @work: work pointer for hmc info
 966  */
 967 static void i40iw_cqp_manage_hmc_fcn_worker(struct work_struct *work)
 968 {
 969         struct i40iw_cqp_request *cqp_request =
 970             ((struct virtchnl_work *)work)->cqp_request;
 971         struct i40iw_ccq_cqe_info ccq_cqe_info;
 972         struct i40iw_hmc_fcn_info *hmcfcninfo =
 973                         &cqp_request->info.in.u.manage_hmc_pm.info;
 974         struct i40iw_device *iwdev =
 975             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->back_dev;
 976
 977         ccq_cqe_info.cqp = NULL;
 978         ccq_cqe_info.maj_err_code = cqp_request->compl_info.maj_err_code;
 979         ccq_cqe_info.min_err_code = cqp_request->compl_info.min_err_code;
 980         ccq_cqe_info.op_code = cqp_request->compl_info.op_code;
 981         ccq_cqe_info.op_ret_val = cqp_request->compl_info.op_ret_val;
 982         ccq_cqe_info.scratch = 0;
 983         ccq_cqe_info.error = cqp_request->compl_info.error;
 984         hmcfcninfo->callback_fcn(cqp_request->info.in.u.manage_hmc_pm.dev,
 985                                  hmcfcninfo->cqp_callback_param, &ccq_cqe_info);
 986         i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
 987 }
 988
 989 /**
 990  * i40iw_cqp_manage_hmc_fcn_callback - called function after cqp completion
 991  * @cqp_request: cqp request info struct for hmc fun
 992  * @unused: unused param of callback
 993  */
 994 static void i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request *cqp_request,
 995                                               u32 unused)
 996 {
 997         struct virtchnl_work *work;
 998         struct i40iw_hmc_fcn_info *hmcfcninfo =
 999             &cqp_request->info.in.u.manage_hmc_pm.info;
1000         struct i40iw_device *iwdev =
1001             (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->
1002             back_dev;
1003
1004         if (hmcfcninfo && hmcfcninfo->callback_fcn) {
1005                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s1\n", __func__);
1006                 atomic_inc(&cqp_request->refcount);
1007                 work = &iwdev->virtchnl_w[hmcfcninfo->iw_vf_idx];
1008                 work->cqp_request = cqp_request;
1009                 INIT_WORK(&work->work, i40iw_cqp_manage_hmc_fcn_worker);
1010                 queue_work(iwdev->virtchnl_wq, &work->work);
1011                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s2\n", __func__);
1012         } else {
1013                 i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s: Something wrong\n", __func__);
1014         }
1015 }
1016
1017 /**
1018  * i40iw_cqp_manage_hmc_fcn_cmd - issue cqp command to manage hmc
1019  * @dev: hardware control device structure
1020  * @hmcfcninfo: info for hmc
1021  */
1022 enum i40iw_status_code i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev *dev,
1023                                                     struct i40iw_hmc_fcn_info *hmcfcninfo)
1024 {
1025         enum i40iw_status_code status;
1026         struct i40iw_cqp_request *cqp_request;
1027         struct cqp_commands_info *cqp_info;
1028         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1029
1030         i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s\n", __func__);
1031         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
1032         if (!cqp_request)
1033                 return I40IW_ERR_NO_MEMORY;
1034         cqp_info = &cqp_request->info;
1035         cqp_request->callback_fcn = i40iw_cqp_manage_hmc_fcn_callback;
1036         cqp_request->param = hmcfcninfo;
1037         memcpy(&cqp_info->in.u.manage_hmc_pm.info, hmcfcninfo,
1038                sizeof(*hmcfcninfo));
1039         cqp_info->in.u.manage_hmc_pm.dev = dev;
1040         cqp_info->cqp_cmd = OP_MANAGE_HMC_PM_FUNC_TABLE;
1041         cqp_info->post_sq = 1;
1042         cqp_info->in.u.manage_hmc_pm.scratch = (uintptr_t)cqp_request;
1043         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1044         if (status)
1045                 i40iw_pr_err("CQP-OP Manage HMC fail");
1046         return status;
1047 }
1048
1049 /**
1050  * i40iw_cqp_query_fpm_values_cmd - send cqp command for fpm
1051  * @iwdev: function device struct
1052  * @values_mem: buffer for fpm
1053  * @hmc_fn_id: function id for fpm
1054  */
1055 enum i40iw_status_code i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev *dev,
1056                                                       struct i40iw_dma_mem *values_mem,
1057                                                       u8 hmc_fn_id)
1058 {
1059         enum i40iw_status_code status;
1060         struct i40iw_cqp_request *cqp_request;
1061         struct cqp_commands_info *cqp_info;
1062         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1063
1064         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1065         if (!cqp_request)
1066                 return I40IW_ERR_NO_MEMORY;
1067         cqp_info = &cqp_request->info;
1068         cqp_request->param = NULL;
1069         cqp_info->in.u.query_fpm_values.cqp = dev->cqp;
1070         cqp_info->in.u.query_fpm_values.fpm_values_pa = values_mem->pa;
1071         cqp_info->in.u.query_fpm_values.fpm_values_va = values_mem->va;
1072         cqp_info->in.u.query_fpm_values.hmc_fn_id = hmc_fn_id;
1073         cqp_info->cqp_cmd = OP_QUERY_FPM_VALUES;
1074         cqp_info->post_sq = 1;
1075         cqp_info->in.u.query_fpm_values.scratch = (uintptr_t)cqp_request;
1076         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1077         if (status)
1078                 i40iw_pr_err("CQP-OP Query FPM fail");
1079         return status;
1080 }
1081
1082 /**
1083  * i40iw_cqp_commit_fpm_values_cmd - commit fpm values in hw
1084  * @dev: hardware control device structure
1085  * @values_mem: buffer with fpm values
1086  * @hmc_fn_id: function id for fpm
1087  */
1088 enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
1089                                                        struct i40iw_dma_mem *values_mem,
1090                                                        u8 hmc_fn_id)
1091 {
1092         enum i40iw_status_code status;
1093         struct i40iw_cqp_request *cqp_request;
1094         struct cqp_commands_info *cqp_info;
1095         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1096
1097         cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1098         if (!cqp_request)
1099                 return I40IW_ERR_NO_MEMORY;
1100         cqp_info = &cqp_request->info;
1101         cqp_request->param = NULL;
1102         cqp_info->in.u.commit_fpm_values.cqp = dev->cqp;
1103         cqp_info->in.u.commit_fpm_values.fpm_values_pa = values_mem->pa;
1104         cqp_info->in.u.commit_fpm_values.fpm_values_va = values_mem->va;
1105         cqp_info->in.u.commit_fpm_values.hmc_fn_id = hmc_fn_id;
1106         cqp_info->cqp_cmd = OP_COMMIT_FPM_VALUES;
1107         cqp_info->post_sq = 1;
1108         cqp_info->in.u.commit_fpm_values.scratch = (uintptr_t)cqp_request;
1109         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1110         if (status)
1111                 i40iw_pr_err("CQP-OP Commit FPM fail");
1112         return status;
1113 }
1114
1115 /**
1116  * i40iw_vf_wait_vchnl_resp - wait for channel msg
1117  * @iwdev: function's device struct
1118  */
1119 enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
1120 {
1121         struct i40iw_device *iwdev = dev->back_dev;
1122         int timeout_ret;
1123
1124         i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
1125                     __func__, __LINE__, dev, iwdev);
1126
1127         atomic_set(&iwdev->vchnl_msgs, 2);
1128         timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
1129                                          (atomic_read(&iwdev->vchnl_msgs) == 1),
1130                                          I40IW_VCHNL_EVENT_TIMEOUT);
1131         atomic_dec(&iwdev->vchnl_msgs);
1132         if (!timeout_ret) {
1133                 i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
1134                 atomic_set(&iwdev->vchnl_msgs, 0);
1135                 dev->vchnl_up = false;
1136                 return I40IW_ERR_TIMEOUT;
1137         }
1138         wake_up(&dev->vf_reqs);
1139         return 0;
1140 }
1141
1142 /**
1143  * i40iw_cqp_cq_create_cmd - create a cq for the cqp
1144  * @dev: device pointer
1145  * @cq: pointer to created cq
1146  */
1147 enum i40iw_status_code i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev *dev,
1148                                                struct i40iw_sc_cq *cq)
1149 {
1150         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1151         struct i40iw_cqp *iwcqp = &iwdev->cqp;
1152         struct i40iw_cqp_request *cqp_request;
1153         struct cqp_commands_info *cqp_info;
1154         enum i40iw_status_code status;
1155
1156         cqp_request = i40iw_get_cqp_request(iwcqp, true);
1157         if (!cqp_request)
1158                 return I40IW_ERR_NO_MEMORY;
1159
1160         cqp_info = &cqp_request->info;
1161         cqp_info->cqp_cmd = OP_CQ_CREATE;
1162         cqp_info->post_sq = 1;
1163         cqp_info->in.u.cq_create.cq = cq;
1164         cqp_info->in.u.cq_create.scratch = (uintptr_t)cqp_request;
1165         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1166         if (status)
1167                 i40iw_pr_err("CQP-OP Create QP fail");
1168
1169         return status;
1170 }
1171
1172 /**
1173  * i40iw_cqp_qp_create_cmd - create a qp for the cqp
1174  * @dev: device pointer
1175  * @qp: pointer to created qp
1176  */
1177 enum i40iw_status_code i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev *dev,
1178                                                struct i40iw_sc_qp *qp)
1179 {
1180         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1181         struct i40iw_cqp *iwcqp = &iwdev->cqp;
1182         struct i40iw_cqp_request *cqp_request;
1183         struct cqp_commands_info *cqp_info;
1184         struct i40iw_create_qp_info *qp_info;
1185         enum i40iw_status_code status;
1186
1187         cqp_request = i40iw_get_cqp_request(iwcqp, true);
1188         if (!cqp_request)
1189                 return I40IW_ERR_NO_MEMORY;
1190
1191         cqp_info = &cqp_request->info;
1192         qp_info = &cqp_request->info.in.u.qp_create.info;
1193
1194         memset(qp_info, 0, sizeof(*qp_info));
1195
1196         qp_info->cq_num_valid = true;
1197         qp_info->next_iwarp_state = I40IW_QP_STATE_RTS;
1198
1199         cqp_info->cqp_cmd = OP_QP_CREATE;
1200         cqp_info->post_sq = 1;
1201         cqp_info->in.u.qp_create.qp = qp;
1202         cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
1203         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1204         if (status)
1205                 i40iw_pr_err("CQP-OP QP create fail");
1206         return status;
1207 }
1208
1209 /**
1210  * i40iw_cqp_cq_destroy_cmd - destroy the cqp cq
1211  * @dev: device pointer
1212  * @cq: pointer to cq
1213  */
1214 void i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_cq *cq)
1215 {
1216         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1217
1218         i40iw_cq_wq_destroy(iwdev, cq);
1219 }
1220
1221 /**
1222  * i40iw_cqp_qp_destroy_cmd - destroy the cqp
1223  * @dev: device pointer
1224  * @qp: pointer to qp
1225  */
1226 void i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1227 {
1228         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1229         struct i40iw_cqp *iwcqp = &iwdev->cqp;
1230         struct i40iw_cqp_request *cqp_request;
1231         struct cqp_commands_info *cqp_info;
1232         enum i40iw_status_code status;
1233
1234         cqp_request = i40iw_get_cqp_request(iwcqp, true);
1235         if (!cqp_request)
1236                 return;
1237
1238         cqp_info = &cqp_request->info;
1239         memset(cqp_info, 0, sizeof(*cqp_info));
1240
1241         cqp_info->cqp_cmd = OP_QP_DESTROY;
1242         cqp_info->post_sq = 1;
1243         cqp_info->in.u.qp_destroy.qp = qp;
1244         cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
1245         cqp_info->in.u.qp_destroy.remove_hash_idx = true;
1246         status = i40iw_handle_cqp_op(iwdev, cqp_request);
1247         if (status)
1248                 i40iw_pr_err("CQP QP_DESTROY fail");
1249 }
1250
1251
1252 /**
1253  * i40iw_ieq_mpa_crc_ae - generate AE for crc error
1254  * @dev: hardware control device structure
1255  * @qp: hardware control qp
1256  */
1257 void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1258 {
1259         struct i40iw_gen_ae_info info;
1260         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1261
1262         i40iw_debug(dev, I40IW_DEBUG_AEQ, "%s entered\n", __func__);
1263         info.ae_code = I40IW_AE_LLP_RECEIVED_MPA_CRC_ERROR;
1264         info.ae_source = I40IW_AE_SOURCE_RQ;
1265         i40iw_gen_ae(iwdev, qp, &info, false);
1266 }
1267
1268 /**
1269  * i40iw_init_hash_desc - initialize hash for crc calculation
1270  * @desc: cryption type
1271  */
1272 enum i40iw_status_code i40iw_init_hash_desc(struct shash_desc **desc)
1273 {
1274         struct crypto_shash *tfm;
1275         struct shash_desc *tdesc;
1276
1277         tfm = crypto_alloc_shash("crc32c", 0, 0);
1278         if (IS_ERR(tfm))
1279                 return I40IW_ERR_MPA_CRC;
1280
1281         tdesc = kzalloc(sizeof(*tdesc) + crypto_shash_descsize(tfm),
1282                         GFP_KERNEL);
1283         if (!tdesc) {
1284                 crypto_free_shash(tfm);
1285                 return I40IW_ERR_MPA_CRC;
1286         }
1287         tdesc->tfm = tfm;
1288         *desc = tdesc;
1289
1290         return 0;
1291 }
1292
1293 /**
1294  * i40iw_free_hash_desc - free hash desc
1295  * @desc: to be freed
1296  */
1297 void i40iw_free_hash_desc(struct shash_desc *desc)
1298 {
1299         if (desc) {
1300                 crypto_free_shash(desc->tfm);
1301                 kfree(desc);
1302         }
1303 }
1304
1305 /**
1306  * i40iw_alloc_query_fpm_buf - allocate buffer for fpm
1307  * @dev: hardware control device structure
1308  * @mem: buffer ptr for fpm to be allocated
1309  * @return: memory allocation status
1310  */
1311 enum i40iw_status_code i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev *dev,
1312                                                  struct i40iw_dma_mem *mem)
1313 {
1314         enum i40iw_status_code status;
1315         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1316
1317         status = i40iw_obj_aligned_mem(iwdev, mem, I40IW_QUERY_FPM_BUF_SIZE,
1318                                        I40IW_FPM_QUERY_BUF_ALIGNMENT_MASK);
1319         return status;
1320 }
1321
1322 /**
1323  * i40iw_ieq_check_mpacrc - check if mpa crc is OK
1324  * @desc: desc for hash
1325  * @addr: address of buffer for crc
1326  * @length: length of buffer
1327  * @value: value to be compared
1328  */
1329 enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc,
1330                                               void *addr,
1331                                               u32 length,
1332                                               u32 value)
1333 {
1334         u32 crc = 0;
1335         int ret;
1336         enum i40iw_status_code ret_code = 0;
1337
1338         crypto_shash_init(desc);
1339         ret = crypto_shash_update(desc, addr, length);
1340         if (!ret)
1341                 crypto_shash_final(desc, (u8 *)&crc);
1342         if (crc != value) {
1343                 i40iw_pr_err("mpa crc check fail\n");
1344                 ret_code = I40IW_ERR_MPA_CRC;
1345         }
1346         return ret_code;
1347 }
1348
1349 /**
1350  * i40iw_ieq_get_qp - get qp based on quad in puda buffer
1351  * @dev: hardware control device structure
1352  * @buf: receive puda buffer on exception q
1353  */
1354 struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev,
1355                                      struct i40iw_puda_buf *buf)
1356 {
1357         struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1358         struct i40iw_qp *iwqp;
1359         struct i40iw_cm_node *cm_node;
1360         u32 loc_addr[4], rem_addr[4];
1361         u16 loc_port, rem_port;
1362         struct ipv6hdr *ip6h;
1363         struct iphdr *iph = (struct iphdr *)buf->iph;
1364         struct tcphdr *tcph = (struct tcphdr *)buf->tcph;
1365
1366         if (iph->version == 4) {
1367                 memset(loc_addr, 0, sizeof(loc_addr));
1368                 loc_addr[0] = ntohl(iph->daddr);
1369                 memset(rem_addr, 0, sizeof(rem_addr));
1370                 rem_addr[0] = ntohl(iph->saddr);
1371         } else {
1372                 ip6h = (struct ipv6hdr *)buf->iph;
1373                 i40iw_copy_ip_ntohl(loc_addr, ip6h->daddr.in6_u.u6_addr32);
1374                 i40iw_copy_ip_ntohl(rem_addr, ip6h->saddr.in6_u.u6_addr32);
1375         }
1376         loc_port = ntohs(tcph->dest);
1377         rem_port = ntohs(tcph->source);
1378
1379         cm_node = i40iw_find_node(&iwdev->cm_core, rem_port, rem_addr, loc_port,
1380                                   loc_addr, false, true);
1381         if (!cm_node)
1382                 return NULL;
1383         iwqp = cm_node->iwqp;
1384         return &iwqp->sc_qp;
1385 }
1386
1387 /**
1388  * i40iw_ieq_update_tcpip_info - update tcpip in the buffer
1389  * @buf: puda to update
1390  * @length: length of buffer
1391  * @seqnum: seq number for tcp
1392  */
1393 void i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf *buf, u16 length, u32 seqnum)
1394 {
1395         struct tcphdr *tcph;
1396         struct iphdr *iph;
1397         u16 iphlen;
1398         u16 packetsize;
1399         u8 *addr = (u8 *)buf->mem.va;
1400
1401         iphlen = (buf->ipv4) ? 20 : 40;
1402         iph = (struct iphdr *)(addr + buf->maclen);
1403         tcph = (struct tcphdr *)(addr + buf->maclen + iphlen);
1404         packetsize = length + buf->tcphlen + iphlen;
1405
1406         iph->tot_len = htons(packetsize);
1407         tcph->seq = htonl(seqnum);
1408 }
1409
1410 /**
1411  * i40iw_puda_get_tcpip_info - get tcpip info from puda buffer
1412  * @info: to get information
1413  * @buf: puda buffer
1414  */
1415 enum i40iw_status_code i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info *info,
1416                                                  struct i40iw_puda_buf *buf)
1417 {
1418         struct iphdr *iph;
1419         struct ipv6hdr *ip6h;
1420         struct tcphdr *tcph;
1421         u16 iphlen;
1422         u16 pkt_len;
1423         u8 *mem = (u8 *)buf->mem.va;
1424         struct ethhdr *ethh = (struct ethhdr *)buf->mem.va;
1425
1426         if (ethh->h_proto == htons(0x8100)) {
1427                 info->vlan_valid = true;
1428                 buf->vlan_id = ntohs(((struct vlan_ethhdr *)ethh)->h_vlan_TCI) & VLAN_VID_MASK;
1429         }
1430         buf->maclen = (info->vlan_valid) ? 18 : 14;
1431         iphlen = (info->l3proto) ? 40 : 20;
1432         buf->ipv4 = (info->l3proto) ? false : true;
1433         buf->iph = mem + buf->maclen;
1434         iph = (struct iphdr *)buf->iph;
1435
1436         buf->tcph = buf->iph + iphlen;
1437         tcph = (struct tcphdr *)buf->tcph;
1438
1439         if (buf->ipv4) {
1440                 pkt_len = ntohs(iph->tot_len);
1441         } else {
1442                 ip6h = (struct ipv6hdr *)buf->iph;
1443                 pkt_len = ntohs(ip6h->payload_len) + iphlen;
1444         }
1445
1446         buf->totallen = pkt_len + buf->maclen;
1447
1448         if (info->payload_len < buf->totallen) {
1449                 i40iw_pr_err("payload_len = 0x%x totallen expected0x%x\n",
1450                              info->payload_len, buf->totallen);
1451                 return I40IW_ERR_INVALID_SIZE;
1452         }
1453
1454         buf->tcphlen = (tcph->doff) << 2;
1455         buf->datalen = pkt_len - iphlen - buf->tcphlen;
1456         buf->data = (buf->datalen) ? buf->tcph + buf->tcphlen : NULL;
1457         buf->hdrlen = buf->maclen + iphlen + buf->tcphlen;
1458         buf->seqnum = ntohl(tcph->seq);
1459         return 0;
1460 }
1461
1462 /**
1463  * i40iw_hw_stats_timeout - Stats timer-handler which updates all HW stats
1464  * @vsi: pointer to the vsi structure
1465  */
1466 static void i40iw_hw_stats_timeout(struct timer_list *t)
1467 {
1468         struct i40iw_vsi_pestat *pf_devstat = from_timer(pf_devstat, t,
1469                                                        stats_timer);
1470         struct i40iw_sc_vsi *sc_vsi = pf_devstat->vsi;
1471         struct i40iw_sc_dev *pf_dev = sc_vsi->dev;
1472         struct i40iw_vsi_pestat *vf_devstat = NULL;
1473         u16 iw_vf_idx;
1474         unsigned long flags;
1475
1476         /*PF*/
1477         i40iw_hw_stats_read_all(pf_devstat, &pf_devstat->hw_stats);
1478
1479         for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
1480                 spin_lock_irqsave(&pf_devstat->lock, flags);
1481                 if (pf_dev->vf_dev[iw_vf_idx]) {
1482                         if (pf_dev->vf_dev[iw_vf_idx]->stats_initialized) {
1483                                 vf_devstat = &pf_dev->vf_dev[iw_vf_idx]->pestat;
1484                                 i40iw_hw_stats_read_all(vf_devstat, &vf_devstat->hw_stats);
1485                         }
1486                 }
1487                 spin_unlock_irqrestore(&pf_devstat->lock, flags);
1488         }
1489
1490         mod_timer(&pf_devstat->stats_timer,
1491                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1492 }
1493
1494 /**
1495  * i40iw_hw_stats_start_timer - Start periodic stats timer
1496  * @vsi: pointer to the vsi structure
1497  */
1498 void i40iw_hw_stats_start_timer(struct i40iw_sc_vsi *vsi)
1499 {
1500         struct i40iw_vsi_pestat *devstat = vsi->pestat;
1501
1502         timer_setup(&devstat->stats_timer, i40iw_hw_stats_timeout, 0);
1503         mod_timer(&devstat->stats_timer,
1504                   jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1505 }
1506
1507 /**
1508  * i40iw_hw_stats_stop_timer - Delete periodic stats timer
1509  * @vsi: pointer to the vsi structure
1510  */
1511 void i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi *vsi)
1512 {
1513         struct i40iw_vsi_pestat *devstat = vsi->pestat;
1514
1515         del_timer_sync(&devstat->stats_timer);
1516 }