linux/drivers/infiniband/hw/i40iw/i40iw_utils.c
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   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 */
  61int 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 */
 122inline 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 */
 134inline 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 */
 145int i40iw_inetaddr_event(struct notifier_block *notifier,
 146                         unsigned long event,
 147                         void *ptr)
 148{
 149        struct in_ifaddr *ifa = ptr;
 150        struct net_device *event_netdev = ifa->ifa_dev->dev;
 151        struct net_device *netdev;
 152        struct net_device *upper_dev;
 153        struct i40iw_device *iwdev;
 154        struct i40iw_handler *hdl;
 155        u32 local_ipaddr;
 156        u32 action = I40IW_ARP_ADD;
 157
 158        hdl = i40iw_find_netdev(event_netdev);
 159        if (!hdl)
 160                return NOTIFY_DONE;
 161
 162        iwdev = &hdl->device;
 163        if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
 164                return NOTIFY_DONE;
 165
 166        netdev = iwdev->ldev->netdev;
 167        upper_dev = netdev_master_upper_dev_get(netdev);
 168        if (netdev != event_netdev)
 169                return NOTIFY_DONE;
 170
 171        if (upper_dev) {
 172                struct in_device *in;
 173
 174                rcu_read_lock();
 175                in = __in_dev_get_rcu(upper_dev);
 176                local_ipaddr = ntohl(in->ifa_list->ifa_address);
 177                rcu_read_unlock();
 178        } else {
 179                local_ipaddr = ntohl(ifa->ifa_address);
 180        }
 181        switch (event) {
 182        case NETDEV_DOWN:
 183                action = I40IW_ARP_DELETE;
 184                /* Fall through */
 185        case NETDEV_UP:
 186                /* Fall through */
 187        case NETDEV_CHANGEADDR:
 188                i40iw_manage_arp_cache(iwdev,
 189                                       netdev->dev_addr,
 190                                       &local_ipaddr,
 191                                       true,
 192                                       action);
 193                i40iw_if_notify(iwdev, netdev, &local_ipaddr, true,
 194                                (action == I40IW_ARP_ADD) ? true : false);
 195                break;
 196        default:
 197                break;
 198        }
 199        return NOTIFY_DONE;
 200}
 201
 202/**
 203 * i40iw_inet6addr_event - system notifier for ipv6 addr events
 204 * @notfier: not used
 205 * @event: event for notifier
 206 * @ptr: if address
 207 */
 208int i40iw_inet6addr_event(struct notifier_block *notifier,
 209                          unsigned long event,
 210                          void *ptr)
 211{
 212        struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 213        struct net_device *event_netdev = ifa->idev->dev;
 214        struct net_device *netdev;
 215        struct i40iw_device *iwdev;
 216        struct i40iw_handler *hdl;
 217        u32 local_ipaddr6[4];
 218        u32 action = I40IW_ARP_ADD;
 219
 220        hdl = i40iw_find_netdev(event_netdev);
 221        if (!hdl)
 222                return NOTIFY_DONE;
 223
 224        iwdev = &hdl->device;
 225        if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
 226                return NOTIFY_DONE;
 227
 228        netdev = iwdev->ldev->netdev;
 229        if (netdev != event_netdev)
 230                return NOTIFY_DONE;
 231
 232        i40iw_copy_ip_ntohl(local_ipaddr6, ifa->addr.in6_u.u6_addr32);
 233        switch (event) {
 234        case NETDEV_DOWN:
 235                action = I40IW_ARP_DELETE;
 236                /* Fall through */
 237        case NETDEV_UP:
 238                /* Fall through */
 239        case NETDEV_CHANGEADDR:
 240                i40iw_manage_arp_cache(iwdev,
 241                                       netdev->dev_addr,
 242                                       local_ipaddr6,
 243                                       false,
 244                                       action);
 245                i40iw_if_notify(iwdev, netdev, local_ipaddr6, false,
 246                                (action == I40IW_ARP_ADD) ? true : false);
 247                break;
 248        default:
 249                break;
 250        }
 251        return NOTIFY_DONE;
 252}
 253
 254/**
 255 * i40iw_net_event - system notifier for netevents
 256 * @notfier: not used
 257 * @event: event for notifier
 258 * @ptr: neighbor
 259 */
 260int i40iw_net_event(struct notifier_block *notifier, unsigned long event, void *ptr)
 261{
 262        struct neighbour *neigh = ptr;
 263        struct i40iw_device *iwdev;
 264        struct i40iw_handler *iwhdl;
 265        __be32 *p;
 266        u32 local_ipaddr[4];
 267
 268        switch (event) {
 269        case NETEVENT_NEIGH_UPDATE:
 270                iwhdl = i40iw_find_netdev((struct net_device *)neigh->dev);
 271                if (!iwhdl)
 272                        return NOTIFY_DONE;
 273                iwdev = &iwhdl->device;
 274                if (iwdev->init_state < IP_ADDR_REGISTERED || iwdev->closing)
 275                        return NOTIFY_DONE;
 276                p = (__be32 *)neigh->primary_key;
 277                i40iw_copy_ip_ntohl(local_ipaddr, p);
 278                if (neigh->nud_state & NUD_VALID) {
 279                        i40iw_manage_arp_cache(iwdev,
 280                                               neigh->ha,
 281                                               local_ipaddr,
 282                                               false,
 283                                               I40IW_ARP_ADD);
 284
 285                } else {
 286                        i40iw_manage_arp_cache(iwdev,
 287                                               neigh->ha,
 288                                               local_ipaddr,
 289                                               false,
 290                                               I40IW_ARP_DELETE);
 291                }
 292                break;
 293        default:
 294                break;
 295        }
 296        return NOTIFY_DONE;
 297}
 298
 299/**
 300 * i40iw_netdevice_event - system notifier for netdev events
 301 * @notfier: not used
 302 * @event: event for notifier
 303 * @ptr: netdev
 304 */
 305int i40iw_netdevice_event(struct notifier_block *notifier,
 306                          unsigned long event,
 307                          void *ptr)
 308{
 309        struct net_device *event_netdev;
 310        struct net_device *netdev;
 311        struct i40iw_device *iwdev;
 312        struct i40iw_handler *hdl;
 313
 314        event_netdev = netdev_notifier_info_to_dev(ptr);
 315
 316        hdl = i40iw_find_netdev(event_netdev);
 317        if (!hdl)
 318                return NOTIFY_DONE;
 319
 320        iwdev = &hdl->device;
 321        if (iwdev->init_state < RDMA_DEV_REGISTERED || iwdev->closing)
 322                return NOTIFY_DONE;
 323
 324        netdev = iwdev->ldev->netdev;
 325        if (netdev != event_netdev)
 326                return NOTIFY_DONE;
 327
 328        iwdev->iw_status = 1;
 329
 330        switch (event) {
 331        case NETDEV_DOWN:
 332                iwdev->iw_status = 0;
 333                /* Fall through */
 334        case NETDEV_UP:
 335                i40iw_port_ibevent(iwdev);
 336                break;
 337        default:
 338                break;
 339        }
 340        return NOTIFY_DONE;
 341}
 342
 343/**
 344 * i40iw_get_cqp_request - get cqp struct
 345 * @cqp: device cqp ptr
 346 * @wait: cqp to be used in wait mode
 347 */
 348struct i40iw_cqp_request *i40iw_get_cqp_request(struct i40iw_cqp *cqp, bool wait)
 349{
 350        struct i40iw_cqp_request *cqp_request = NULL;
 351        unsigned long flags;
 352
 353        spin_lock_irqsave(&cqp->req_lock, flags);
 354        if (!list_empty(&cqp->cqp_avail_reqs)) {
 355                cqp_request = list_entry(cqp->cqp_avail_reqs.next,
 356                                         struct i40iw_cqp_request, list);
 357                list_del_init(&cqp_request->list);
 358        }
 359        spin_unlock_irqrestore(&cqp->req_lock, flags);
 360        if (!cqp_request) {
 361                cqp_request = kzalloc(sizeof(*cqp_request), GFP_ATOMIC);
 362                if (cqp_request) {
 363                        cqp_request->dynamic = true;
 364                        INIT_LIST_HEAD(&cqp_request->list);
 365                        init_waitqueue_head(&cqp_request->waitq);
 366                }
 367        }
 368        if (!cqp_request) {
 369                i40iw_pr_err("CQP Request Fail: No Memory");
 370                return NULL;
 371        }
 372
 373        if (wait) {
 374                atomic_set(&cqp_request->refcount, 2);
 375                cqp_request->waiting = true;
 376        } else {
 377                atomic_set(&cqp_request->refcount, 1);
 378        }
 379        return cqp_request;
 380}
 381
 382/**
 383 * i40iw_free_cqp_request - free cqp request
 384 * @cqp: cqp ptr
 385 * @cqp_request: to be put back in cqp list
 386 */
 387void i40iw_free_cqp_request(struct i40iw_cqp *cqp, struct i40iw_cqp_request *cqp_request)
 388{
 389        struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
 390        unsigned long flags;
 391
 392        if (cqp_request->dynamic) {
 393                kfree(cqp_request);
 394        } else {
 395                cqp_request->request_done = false;
 396                cqp_request->callback_fcn = NULL;
 397                cqp_request->waiting = false;
 398
 399                spin_lock_irqsave(&cqp->req_lock, flags);
 400                list_add_tail(&cqp_request->list, &cqp->cqp_avail_reqs);
 401                spin_unlock_irqrestore(&cqp->req_lock, flags);
 402        }
 403        wake_up(&iwdev->close_wq);
 404}
 405
 406/**
 407 * i40iw_put_cqp_request - dec ref count and free if 0
 408 * @cqp: cqp ptr
 409 * @cqp_request: to be put back in cqp list
 410 */
 411void i40iw_put_cqp_request(struct i40iw_cqp *cqp,
 412                           struct i40iw_cqp_request *cqp_request)
 413{
 414        if (atomic_dec_and_test(&cqp_request->refcount))
 415                i40iw_free_cqp_request(cqp, cqp_request);
 416}
 417
 418/**
 419 * i40iw_free_pending_cqp_request -free pending cqp request objs
 420 * @cqp: cqp ptr
 421 * @cqp_request: to be put back in cqp list
 422 */
 423static void i40iw_free_pending_cqp_request(struct i40iw_cqp *cqp,
 424                                           struct i40iw_cqp_request *cqp_request)
 425{
 426        struct i40iw_device *iwdev = container_of(cqp, struct i40iw_device, cqp);
 427
 428        if (cqp_request->waiting) {
 429                cqp_request->compl_info.error = true;
 430                cqp_request->request_done = true;
 431                wake_up(&cqp_request->waitq);
 432        }
 433        i40iw_put_cqp_request(cqp, cqp_request);
 434        wait_event_timeout(iwdev->close_wq,
 435                           !atomic_read(&cqp_request->refcount),
 436                           1000);
 437}
 438
 439/**
 440 * i40iw_cleanup_pending_cqp_op - clean-up cqp with no completions
 441 * @iwdev: iwarp device
 442 */
 443void i40iw_cleanup_pending_cqp_op(struct i40iw_device *iwdev)
 444{
 445        struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 446        struct i40iw_cqp *cqp = &iwdev->cqp;
 447        struct i40iw_cqp_request *cqp_request = NULL;
 448        struct cqp_commands_info *pcmdinfo = NULL;
 449        u32 i, pending_work, wqe_idx;
 450
 451        pending_work = I40IW_RING_WORK_AVAILABLE(cqp->sc_cqp.sq_ring);
 452        wqe_idx = I40IW_RING_GETCURRENT_TAIL(cqp->sc_cqp.sq_ring);
 453        for (i = 0; i < pending_work; i++) {
 454                cqp_request = (struct i40iw_cqp_request *)(unsigned long)cqp->scratch_array[wqe_idx];
 455                if (cqp_request)
 456                        i40iw_free_pending_cqp_request(cqp, cqp_request);
 457                wqe_idx = (wqe_idx + 1) % I40IW_RING_GETSIZE(cqp->sc_cqp.sq_ring);
 458        }
 459
 460        while (!list_empty(&dev->cqp_cmd_head)) {
 461                pcmdinfo = (struct cqp_commands_info *)i40iw_remove_head(&dev->cqp_cmd_head);
 462                cqp_request = container_of(pcmdinfo, struct i40iw_cqp_request, info);
 463                if (cqp_request)
 464                        i40iw_free_pending_cqp_request(cqp, cqp_request);
 465        }
 466}
 467
 468/**
 469 * i40iw_free_qp - callback after destroy cqp completes
 470 * @cqp_request: cqp request for destroy qp
 471 * @num: not used
 472 */
 473static void i40iw_free_qp(struct i40iw_cqp_request *cqp_request, u32 num)
 474{
 475        struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)cqp_request->param;
 476        struct i40iw_qp *iwqp = (struct i40iw_qp *)qp->back_qp;
 477        struct i40iw_device *iwdev;
 478        u32 qp_num = iwqp->ibqp.qp_num;
 479
 480        iwdev = iwqp->iwdev;
 481
 482        i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
 483        i40iw_free_qp_resources(iwdev, iwqp, qp_num);
 484        i40iw_rem_devusecount(iwdev);
 485}
 486
 487/**
 488 * i40iw_wait_event - wait for completion
 489 * @iwdev: iwarp device
 490 * @cqp_request: cqp request to wait
 491 */
 492static int i40iw_wait_event(struct i40iw_device *iwdev,
 493                            struct i40iw_cqp_request *cqp_request)
 494{
 495        struct cqp_commands_info *info = &cqp_request->info;
 496        struct i40iw_cqp *iwcqp = &iwdev->cqp;
 497        struct i40iw_cqp_timeout cqp_timeout;
 498        bool cqp_error = false;
 499        int err_code = 0;
 500        memset(&cqp_timeout, 0, sizeof(cqp_timeout));
 501        cqp_timeout.compl_cqp_cmds = iwdev->sc_dev.cqp_cmd_stats[OP_COMPLETED_COMMANDS];
 502        do {
 503                if (wait_event_timeout(cqp_request->waitq,
 504                                       cqp_request->request_done, CQP_COMPL_WAIT_TIME))
 505                        break;
 506
 507                i40iw_check_cqp_progress(&cqp_timeout, &iwdev->sc_dev);
 508
 509                if (cqp_timeout.count < CQP_TIMEOUT_THRESHOLD)
 510                        continue;
 511
 512                i40iw_pr_err("error cqp command 0x%x timed out", info->cqp_cmd);
 513                err_code = -ETIME;
 514                if (!iwdev->reset) {
 515                        iwdev->reset = true;
 516                        i40iw_request_reset(iwdev);
 517                }
 518                goto done;
 519        } while (1);
 520        cqp_error = cqp_request->compl_info.error;
 521        if (cqp_error) {
 522                i40iw_pr_err("error cqp command 0x%x completion maj = 0x%x min=0x%x\n",
 523                             info->cqp_cmd, cqp_request->compl_info.maj_err_code,
 524                             cqp_request->compl_info.min_err_code);
 525                err_code = -EPROTO;
 526                goto done;
 527        }
 528done:
 529        i40iw_put_cqp_request(iwcqp, cqp_request);
 530        return err_code;
 531}
 532
 533/**
 534 * i40iw_handle_cqp_op - process cqp command
 535 * @iwdev: iwarp device
 536 * @cqp_request: cqp request to process
 537 */
 538enum i40iw_status_code i40iw_handle_cqp_op(struct i40iw_device *iwdev,
 539                                           struct i40iw_cqp_request
 540                                           *cqp_request)
 541{
 542        struct i40iw_sc_dev *dev = &iwdev->sc_dev;
 543        enum i40iw_status_code status;
 544        struct cqp_commands_info *info = &cqp_request->info;
 545        int err_code = 0;
 546
 547        if (iwdev->reset) {
 548                i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
 549                return I40IW_ERR_CQP_COMPL_ERROR;
 550        }
 551
 552        status = i40iw_process_cqp_cmd(dev, info);
 553        if (status) {
 554                i40iw_pr_err("error cqp command 0x%x failed\n", info->cqp_cmd);
 555                i40iw_free_cqp_request(&iwdev->cqp, cqp_request);
 556                return status;
 557        }
 558        if (cqp_request->waiting)
 559                err_code = i40iw_wait_event(iwdev, cqp_request);
 560        if (err_code)
 561                status = I40IW_ERR_CQP_COMPL_ERROR;
 562        return status;
 563}
 564
 565/**
 566 * i40iw_add_devusecount - add dev refcount
 567 * @iwdev: dev for refcount
 568 */
 569void i40iw_add_devusecount(struct i40iw_device *iwdev)
 570{
 571        atomic64_inc(&iwdev->use_count);
 572}
 573
 574/**
 575 * i40iw_rem_devusecount - decrement refcount for dev
 576 * @iwdev: device
 577 */
 578void i40iw_rem_devusecount(struct i40iw_device *iwdev)
 579{
 580        if (!atomic64_dec_and_test(&iwdev->use_count))
 581                return;
 582        wake_up(&iwdev->close_wq);
 583}
 584
 585/**
 586 * i40iw_add_pdusecount - add pd refcount
 587 * @iwpd: pd for refcount
 588 */
 589void i40iw_add_pdusecount(struct i40iw_pd *iwpd)
 590{
 591        atomic_inc(&iwpd->usecount);
 592}
 593
 594/**
 595 * i40iw_rem_pdusecount - decrement refcount for pd and free if 0
 596 * @iwpd: pd for refcount
 597 * @iwdev: iwarp device
 598 */
 599void i40iw_rem_pdusecount(struct i40iw_pd *iwpd, struct i40iw_device *iwdev)
 600{
 601        if (!atomic_dec_and_test(&iwpd->usecount))
 602                return;
 603        i40iw_free_resource(iwdev, iwdev->allocated_pds, iwpd->sc_pd.pd_id);
 604        kfree(iwpd);
 605}
 606
 607/**
 608 * i40iw_add_ref - add refcount for qp
 609 * @ibqp: iqarp qp
 610 */
 611void i40iw_add_ref(struct ib_qp *ibqp)
 612{
 613        struct i40iw_qp *iwqp = (struct i40iw_qp *)ibqp;
 614
 615        atomic_inc(&iwqp->refcount);
 616}
 617
 618/**
 619 * i40iw_rem_ref - rem refcount for qp and free if 0
 620 * @ibqp: iqarp qp
 621 */
 622void i40iw_rem_ref(struct ib_qp *ibqp)
 623{
 624        struct i40iw_qp *iwqp;
 625        enum i40iw_status_code status;
 626        struct i40iw_cqp_request *cqp_request;
 627        struct cqp_commands_info *cqp_info;
 628        struct i40iw_device *iwdev;
 629        u32 qp_num;
 630        unsigned long flags;
 631
 632        iwqp = to_iwqp(ibqp);
 633        iwdev = iwqp->iwdev;
 634        spin_lock_irqsave(&iwdev->qptable_lock, flags);
 635        if (!atomic_dec_and_test(&iwqp->refcount)) {
 636                spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 637                return;
 638        }
 639
 640        qp_num = iwqp->ibqp.qp_num;
 641        iwdev->qp_table[qp_num] = NULL;
 642        spin_unlock_irqrestore(&iwdev->qptable_lock, flags);
 643        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 644        if (!cqp_request)
 645                return;
 646
 647        cqp_request->callback_fcn = i40iw_free_qp;
 648        cqp_request->param = (void *)&iwqp->sc_qp;
 649        cqp_info = &cqp_request->info;
 650        cqp_info->cqp_cmd = OP_QP_DESTROY;
 651        cqp_info->post_sq = 1;
 652        cqp_info->in.u.qp_destroy.qp = &iwqp->sc_qp;
 653        cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
 654        cqp_info->in.u.qp_destroy.remove_hash_idx = true;
 655        status = i40iw_handle_cqp_op(iwdev, cqp_request);
 656        if (!status)
 657                return;
 658
 659        i40iw_rem_pdusecount(iwqp->iwpd, iwdev);
 660        i40iw_free_qp_resources(iwdev, iwqp, qp_num);
 661        i40iw_rem_devusecount(iwdev);
 662}
 663
 664/**
 665 * i40iw_get_qp - get qp address
 666 * @device: iwarp device
 667 * @qpn: qp number
 668 */
 669struct ib_qp *i40iw_get_qp(struct ib_device *device, int qpn)
 670{
 671        struct i40iw_device *iwdev = to_iwdev(device);
 672
 673        if ((qpn < IW_FIRST_QPN) || (qpn >= iwdev->max_qp))
 674                return NULL;
 675
 676        return &iwdev->qp_table[qpn]->ibqp;
 677}
 678
 679/**
 680 * i40iw_debug_buf - print debug msg and buffer is mask set
 681 * @dev: hardware control device structure
 682 * @mask: mask to compare if to print debug buffer
 683 * @buf: points buffer addr
 684 * @size: saize of buffer to print
 685 */
 686void i40iw_debug_buf(struct i40iw_sc_dev *dev,
 687                     enum i40iw_debug_flag mask,
 688                     char *desc,
 689                     u64 *buf,
 690                     u32 size)
 691{
 692        u32 i;
 693
 694        if (!(dev->debug_mask & mask))
 695                return;
 696        i40iw_debug(dev, mask, "%s\n", desc);
 697        i40iw_debug(dev, mask, "starting address virt=%p phy=%llxh\n", buf,
 698                    (unsigned long long)virt_to_phys(buf));
 699
 700        for (i = 0; i < size; i += 8)
 701                i40iw_debug(dev, mask, "index %03d val: %016llx\n", i, buf[i / 8]);
 702}
 703
 704/**
 705 * i40iw_get_hw_addr - return hw addr
 706 * @par: points to shared dev
 707 */
 708u8 __iomem *i40iw_get_hw_addr(void *par)
 709{
 710        struct i40iw_sc_dev *dev = (struct i40iw_sc_dev *)par;
 711
 712        return dev->hw->hw_addr;
 713}
 714
 715/**
 716 * i40iw_remove_head - return head entry and remove from list
 717 * @list: list for entry
 718 */
 719void *i40iw_remove_head(struct list_head *list)
 720{
 721        struct list_head *entry;
 722
 723        if (list_empty(list))
 724                return NULL;
 725
 726        entry = (void *)list->next;
 727        list_del(entry);
 728        return (void *)entry;
 729}
 730
 731/**
 732 * i40iw_allocate_dma_mem - Memory alloc helper fn
 733 * @hw:   pointer to the HW structure
 734 * @mem:  ptr to mem struct to fill out
 735 * @size: size of memory requested
 736 * @alignment: what to align the allocation to
 737 */
 738enum i40iw_status_code i40iw_allocate_dma_mem(struct i40iw_hw *hw,
 739                                              struct i40iw_dma_mem *mem,
 740                                              u64 size,
 741                                              u32 alignment)
 742{
 743        struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 744
 745        if (!mem)
 746                return I40IW_ERR_PARAM;
 747        mem->size = ALIGN(size, alignment);
 748        mem->va = dma_alloc_coherent(&pcidev->dev, mem->size,
 749                                     (dma_addr_t *)&mem->pa, GFP_KERNEL);
 750        if (!mem->va)
 751                return I40IW_ERR_NO_MEMORY;
 752        return 0;
 753}
 754
 755/**
 756 * i40iw_free_dma_mem - Memory free helper fn
 757 * @hw:   pointer to the HW structure
 758 * @mem:  ptr to mem struct to free
 759 */
 760void i40iw_free_dma_mem(struct i40iw_hw *hw, struct i40iw_dma_mem *mem)
 761{
 762        struct pci_dev *pcidev = (struct pci_dev *)hw->dev_context;
 763
 764        if (!mem || !mem->va)
 765                return;
 766
 767        dma_free_coherent(&pcidev->dev, mem->size,
 768                          mem->va, (dma_addr_t)mem->pa);
 769        mem->va = NULL;
 770}
 771
 772/**
 773 * i40iw_allocate_virt_mem - virtual memory alloc helper fn
 774 * @hw:   pointer to the HW structure
 775 * @mem:  ptr to mem struct to fill out
 776 * @size: size of memory requested
 777 */
 778enum i40iw_status_code i40iw_allocate_virt_mem(struct i40iw_hw *hw,
 779                                               struct i40iw_virt_mem *mem,
 780                                               u32 size)
 781{
 782        if (!mem)
 783                return I40IW_ERR_PARAM;
 784
 785        mem->size = size;
 786        mem->va = kzalloc(size, GFP_KERNEL);
 787
 788        if (mem->va)
 789                return 0;
 790        else
 791                return I40IW_ERR_NO_MEMORY;
 792}
 793
 794/**
 795 * i40iw_free_virt_mem - virtual memory free helper fn
 796 * @hw:   pointer to the HW structure
 797 * @mem:  ptr to mem struct to free
 798 */
 799enum i40iw_status_code i40iw_free_virt_mem(struct i40iw_hw *hw,
 800                                           struct i40iw_virt_mem *mem)
 801{
 802        if (!mem)
 803                return I40IW_ERR_PARAM;
 804        /*
 805         * mem->va points to the parent of mem, so both mem and mem->va
 806         * can not be touched once mem->va is freed
 807         */
 808        kfree(mem->va);
 809        return 0;
 810}
 811
 812/**
 813 * i40iw_cqp_sds_cmd - create cqp command for sd
 814 * @dev: hardware control device structure
 815 * @sd_info: information  for sd cqp
 816 *
 817 */
 818enum i40iw_status_code i40iw_cqp_sds_cmd(struct i40iw_sc_dev *dev,
 819                                         struct i40iw_update_sds_info *sdinfo)
 820{
 821        enum i40iw_status_code status;
 822        struct i40iw_cqp_request *cqp_request;
 823        struct cqp_commands_info *cqp_info;
 824        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 825
 826        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
 827        if (!cqp_request)
 828                return I40IW_ERR_NO_MEMORY;
 829        cqp_info = &cqp_request->info;
 830        memcpy(&cqp_info->in.u.update_pe_sds.info, sdinfo,
 831               sizeof(cqp_info->in.u.update_pe_sds.info));
 832        cqp_info->cqp_cmd = OP_UPDATE_PE_SDS;
 833        cqp_info->post_sq = 1;
 834        cqp_info->in.u.update_pe_sds.dev = dev;
 835        cqp_info->in.u.update_pe_sds.scratch = (uintptr_t)cqp_request;
 836        status = i40iw_handle_cqp_op(iwdev, cqp_request);
 837        if (status)
 838                i40iw_pr_err("CQP-OP Update SD's fail");
 839        return status;
 840}
 841
 842/**
 843 * i40iw_qp_suspend_resume - cqp command for suspend/resume
 844 * @dev: hardware control device structure
 845 * @qp: hardware control qp
 846 * @suspend: flag if suspend or resume
 847 */
 848void i40iw_qp_suspend_resume(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp, bool suspend)
 849{
 850        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 851        struct i40iw_cqp_request *cqp_request;
 852        struct i40iw_sc_cqp *cqp = dev->cqp;
 853        struct cqp_commands_info *cqp_info;
 854        enum i40iw_status_code status;
 855
 856        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
 857        if (!cqp_request)
 858                return;
 859
 860        cqp_info = &cqp_request->info;
 861        cqp_info->cqp_cmd = (suspend) ? OP_SUSPEND : OP_RESUME;
 862        cqp_info->in.u.suspend_resume.cqp = cqp;
 863        cqp_info->in.u.suspend_resume.qp = qp;
 864        cqp_info->in.u.suspend_resume.scratch = (uintptr_t)cqp_request;
 865        status = i40iw_handle_cqp_op(iwdev, cqp_request);
 866        if (status)
 867                i40iw_pr_err("CQP-OP QP Suspend/Resume fail");
 868}
 869
 870/**
 871 * i40iw_term_modify_qp - modify qp for term message
 872 * @qp: hardware control qp
 873 * @next_state: qp's next state
 874 * @term: terminate code
 875 * @term_len: length
 876 */
 877void i40iw_term_modify_qp(struct i40iw_sc_qp *qp, u8 next_state, u8 term, u8 term_len)
 878{
 879        struct i40iw_qp *iwqp;
 880
 881        iwqp = (struct i40iw_qp *)qp->back_qp;
 882        i40iw_next_iw_state(iwqp, next_state, 0, term, term_len);
 883};
 884
 885/**
 886 * i40iw_terminate_done - after terminate is completed
 887 * @qp: hardware control qp
 888 * @timeout_occurred: indicates if terminate timer expired
 889 */
 890void i40iw_terminate_done(struct i40iw_sc_qp *qp, int timeout_occurred)
 891{
 892        struct i40iw_qp *iwqp;
 893        u32 next_iwarp_state = I40IW_QP_STATE_ERROR;
 894        u8 hte = 0;
 895        bool first_time;
 896        unsigned long flags;
 897
 898        iwqp = (struct i40iw_qp *)qp->back_qp;
 899        spin_lock_irqsave(&iwqp->lock, flags);
 900        if (iwqp->hte_added) {
 901                iwqp->hte_added = 0;
 902                hte = 1;
 903        }
 904        first_time = !(qp->term_flags & I40IW_TERM_DONE);
 905        qp->term_flags |= I40IW_TERM_DONE;
 906        spin_unlock_irqrestore(&iwqp->lock, flags);
 907        if (first_time) {
 908                if (!timeout_occurred)
 909                        i40iw_terminate_del_timer(qp);
 910                else
 911                        next_iwarp_state = I40IW_QP_STATE_CLOSING;
 912
 913                i40iw_next_iw_state(iwqp, next_iwarp_state, hte, 0, 0);
 914                i40iw_cm_disconn(iwqp);
 915        }
 916}
 917
 918/**
 919 * i40iw_terminate_imeout - timeout happened
 920 * @context: points to iwarp qp
 921 */
 922static void i40iw_terminate_timeout(struct timer_list *t)
 923{
 924        struct i40iw_qp *iwqp = from_timer(iwqp, t, terminate_timer);
 925        struct i40iw_sc_qp *qp = (struct i40iw_sc_qp *)&iwqp->sc_qp;
 926
 927        i40iw_terminate_done(qp, 1);
 928        i40iw_rem_ref(&iwqp->ibqp);
 929}
 930
 931/**
 932 * i40iw_terminate_start_timer - start terminate timeout
 933 * @qp: hardware control qp
 934 */
 935void i40iw_terminate_start_timer(struct i40iw_sc_qp *qp)
 936{
 937        struct i40iw_qp *iwqp;
 938
 939        iwqp = (struct i40iw_qp *)qp->back_qp;
 940        i40iw_add_ref(&iwqp->ibqp);
 941        timer_setup(&iwqp->terminate_timer, i40iw_terminate_timeout, 0);
 942        iwqp->terminate_timer.expires = jiffies + HZ;
 943        add_timer(&iwqp->terminate_timer);
 944}
 945
 946/**
 947 * i40iw_terminate_del_timer - delete terminate timeout
 948 * @qp: hardware control qp
 949 */
 950void i40iw_terminate_del_timer(struct i40iw_sc_qp *qp)
 951{
 952        struct i40iw_qp *iwqp;
 953
 954        iwqp = (struct i40iw_qp *)qp->back_qp;
 955        if (del_timer(&iwqp->terminate_timer))
 956                i40iw_rem_ref(&iwqp->ibqp);
 957}
 958
 959/**
 960 * i40iw_cqp_generic_worker - generic worker for cqp
 961 * @work: work pointer
 962 */
 963static void i40iw_cqp_generic_worker(struct work_struct *work)
 964{
 965        struct i40iw_virtchnl_work_info *work_info =
 966            &((struct virtchnl_work *)work)->work_info;
 967
 968        if (work_info->worker_vf_dev)
 969                work_info->callback_fcn(work_info->worker_vf_dev);
 970}
 971
 972/**
 973 * i40iw_cqp_spawn_worker - spawn worket thread
 974 * @iwdev: device struct pointer
 975 * @work_info: work request info
 976 * @iw_vf_idx: virtual function index
 977 */
 978void i40iw_cqp_spawn_worker(struct i40iw_sc_dev *dev,
 979                            struct i40iw_virtchnl_work_info *work_info,
 980                            u32 iw_vf_idx)
 981{
 982        struct virtchnl_work *work;
 983        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
 984
 985        work = &iwdev->virtchnl_w[iw_vf_idx];
 986        memcpy(&work->work_info, work_info, sizeof(*work_info));
 987        INIT_WORK(&work->work, i40iw_cqp_generic_worker);
 988        queue_work(iwdev->virtchnl_wq, &work->work);
 989}
 990
 991/**
 992 * i40iw_cqp_manage_hmc_fcn_worker -
 993 * @work: work pointer for hmc info
 994 */
 995static void i40iw_cqp_manage_hmc_fcn_worker(struct work_struct *work)
 996{
 997        struct i40iw_cqp_request *cqp_request =
 998            ((struct virtchnl_work *)work)->cqp_request;
 999        struct i40iw_ccq_cqe_info ccq_cqe_info;
1000        struct i40iw_hmc_fcn_info *hmcfcninfo =
1001                        &cqp_request->info.in.u.manage_hmc_pm.info;
1002        struct i40iw_device *iwdev =
1003            (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->back_dev;
1004
1005        ccq_cqe_info.cqp = NULL;
1006        ccq_cqe_info.maj_err_code = cqp_request->compl_info.maj_err_code;
1007        ccq_cqe_info.min_err_code = cqp_request->compl_info.min_err_code;
1008        ccq_cqe_info.op_code = cqp_request->compl_info.op_code;
1009        ccq_cqe_info.op_ret_val = cqp_request->compl_info.op_ret_val;
1010        ccq_cqe_info.scratch = 0;
1011        ccq_cqe_info.error = cqp_request->compl_info.error;
1012        hmcfcninfo->callback_fcn(cqp_request->info.in.u.manage_hmc_pm.dev,
1013                                 hmcfcninfo->cqp_callback_param, &ccq_cqe_info);
1014        i40iw_put_cqp_request(&iwdev->cqp, cqp_request);
1015}
1016
1017/**
1018 * i40iw_cqp_manage_hmc_fcn_callback - called function after cqp completion
1019 * @cqp_request: cqp request info struct for hmc fun
1020 * @unused: unused param of callback
1021 */
1022static void i40iw_cqp_manage_hmc_fcn_callback(struct i40iw_cqp_request *cqp_request,
1023                                              u32 unused)
1024{
1025        struct virtchnl_work *work;
1026        struct i40iw_hmc_fcn_info *hmcfcninfo =
1027            &cqp_request->info.in.u.manage_hmc_pm.info;
1028        struct i40iw_device *iwdev =
1029            (struct i40iw_device *)cqp_request->info.in.u.manage_hmc_pm.dev->
1030            back_dev;
1031
1032        if (hmcfcninfo && hmcfcninfo->callback_fcn) {
1033                i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s1\n", __func__);
1034                atomic_inc(&cqp_request->refcount);
1035                work = &iwdev->virtchnl_w[hmcfcninfo->iw_vf_idx];
1036                work->cqp_request = cqp_request;
1037                INIT_WORK(&work->work, i40iw_cqp_manage_hmc_fcn_worker);
1038                queue_work(iwdev->virtchnl_wq, &work->work);
1039                i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s2\n", __func__);
1040        } else {
1041                i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s: Something wrong\n", __func__);
1042        }
1043}
1044
1045/**
1046 * i40iw_cqp_manage_hmc_fcn_cmd - issue cqp command to manage hmc
1047 * @dev: hardware control device structure
1048 * @hmcfcninfo: info for hmc
1049 */
1050enum i40iw_status_code i40iw_cqp_manage_hmc_fcn_cmd(struct i40iw_sc_dev *dev,
1051                                                    struct i40iw_hmc_fcn_info *hmcfcninfo)
1052{
1053        enum i40iw_status_code status;
1054        struct i40iw_cqp_request *cqp_request;
1055        struct cqp_commands_info *cqp_info;
1056        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1057
1058        i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_HMC, "%s\n", __func__);
1059        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, false);
1060        if (!cqp_request)
1061                return I40IW_ERR_NO_MEMORY;
1062        cqp_info = &cqp_request->info;
1063        cqp_request->callback_fcn = i40iw_cqp_manage_hmc_fcn_callback;
1064        cqp_request->param = hmcfcninfo;
1065        memcpy(&cqp_info->in.u.manage_hmc_pm.info, hmcfcninfo,
1066               sizeof(*hmcfcninfo));
1067        cqp_info->in.u.manage_hmc_pm.dev = dev;
1068        cqp_info->cqp_cmd = OP_MANAGE_HMC_PM_FUNC_TABLE;
1069        cqp_info->post_sq = 1;
1070        cqp_info->in.u.manage_hmc_pm.scratch = (uintptr_t)cqp_request;
1071        status = i40iw_handle_cqp_op(iwdev, cqp_request);
1072        if (status)
1073                i40iw_pr_err("CQP-OP Manage HMC fail");
1074        return status;
1075}
1076
1077/**
1078 * i40iw_cqp_query_fpm_values_cmd - send cqp command for fpm
1079 * @iwdev: function device struct
1080 * @values_mem: buffer for fpm
1081 * @hmc_fn_id: function id for fpm
1082 */
1083enum i40iw_status_code i40iw_cqp_query_fpm_values_cmd(struct i40iw_sc_dev *dev,
1084                                                      struct i40iw_dma_mem *values_mem,
1085                                                      u8 hmc_fn_id)
1086{
1087        enum i40iw_status_code status;
1088        struct i40iw_cqp_request *cqp_request;
1089        struct cqp_commands_info *cqp_info;
1090        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1091
1092        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1093        if (!cqp_request)
1094                return I40IW_ERR_NO_MEMORY;
1095        cqp_info = &cqp_request->info;
1096        cqp_request->param = NULL;
1097        cqp_info->in.u.query_fpm_values.cqp = dev->cqp;
1098        cqp_info->in.u.query_fpm_values.fpm_values_pa = values_mem->pa;
1099        cqp_info->in.u.query_fpm_values.fpm_values_va = values_mem->va;
1100        cqp_info->in.u.query_fpm_values.hmc_fn_id = hmc_fn_id;
1101        cqp_info->cqp_cmd = OP_QUERY_FPM_VALUES;
1102        cqp_info->post_sq = 1;
1103        cqp_info->in.u.query_fpm_values.scratch = (uintptr_t)cqp_request;
1104        status = i40iw_handle_cqp_op(iwdev, cqp_request);
1105        if (status)
1106                i40iw_pr_err("CQP-OP Query FPM fail");
1107        return status;
1108}
1109
1110/**
1111 * i40iw_cqp_commit_fpm_values_cmd - commit fpm values in hw
1112 * @dev: hardware control device structure
1113 * @values_mem: buffer with fpm values
1114 * @hmc_fn_id: function id for fpm
1115 */
1116enum i40iw_status_code i40iw_cqp_commit_fpm_values_cmd(struct i40iw_sc_dev *dev,
1117                                                       struct i40iw_dma_mem *values_mem,
1118                                                       u8 hmc_fn_id)
1119{
1120        enum i40iw_status_code status;
1121        struct i40iw_cqp_request *cqp_request;
1122        struct cqp_commands_info *cqp_info;
1123        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1124
1125        cqp_request = i40iw_get_cqp_request(&iwdev->cqp, true);
1126        if (!cqp_request)
1127                return I40IW_ERR_NO_MEMORY;
1128        cqp_info = &cqp_request->info;
1129        cqp_request->param = NULL;
1130        cqp_info->in.u.commit_fpm_values.cqp = dev->cqp;
1131        cqp_info->in.u.commit_fpm_values.fpm_values_pa = values_mem->pa;
1132        cqp_info->in.u.commit_fpm_values.fpm_values_va = values_mem->va;
1133        cqp_info->in.u.commit_fpm_values.hmc_fn_id = hmc_fn_id;
1134        cqp_info->cqp_cmd = OP_COMMIT_FPM_VALUES;
1135        cqp_info->post_sq = 1;
1136        cqp_info->in.u.commit_fpm_values.scratch = (uintptr_t)cqp_request;
1137        status = i40iw_handle_cqp_op(iwdev, cqp_request);
1138        if (status)
1139                i40iw_pr_err("CQP-OP Commit FPM fail");
1140        return status;
1141}
1142
1143/**
1144 * i40iw_vf_wait_vchnl_resp - wait for channel msg
1145 * @iwdev: function's device struct
1146 */
1147enum i40iw_status_code i40iw_vf_wait_vchnl_resp(struct i40iw_sc_dev *dev)
1148{
1149        struct i40iw_device *iwdev = dev->back_dev;
1150        int timeout_ret;
1151
1152        i40iw_debug(dev, I40IW_DEBUG_VIRT, "%s[%u] dev %p, iwdev %p\n",
1153                    __func__, __LINE__, dev, iwdev);
1154
1155        atomic_set(&iwdev->vchnl_msgs, 2);
1156        timeout_ret = wait_event_timeout(iwdev->vchnl_waitq,
1157                                         (atomic_read(&iwdev->vchnl_msgs) == 1),
1158                                         I40IW_VCHNL_EVENT_TIMEOUT);
1159        atomic_dec(&iwdev->vchnl_msgs);
1160        if (!timeout_ret) {
1161                i40iw_pr_err("virt channel completion timeout = 0x%x\n", timeout_ret);
1162                atomic_set(&iwdev->vchnl_msgs, 0);
1163                dev->vchnl_up = false;
1164                return I40IW_ERR_TIMEOUT;
1165        }
1166        wake_up(&dev->vf_reqs);
1167        return 0;
1168}
1169
1170/**
1171 * i40iw_cqp_cq_create_cmd - create a cq for the cqp
1172 * @dev: device pointer
1173 * @cq: pointer to created cq
1174 */
1175enum i40iw_status_code i40iw_cqp_cq_create_cmd(struct i40iw_sc_dev *dev,
1176                                               struct i40iw_sc_cq *cq)
1177{
1178        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1179        struct i40iw_cqp *iwcqp = &iwdev->cqp;
1180        struct i40iw_cqp_request *cqp_request;
1181        struct cqp_commands_info *cqp_info;
1182        enum i40iw_status_code status;
1183
1184        cqp_request = i40iw_get_cqp_request(iwcqp, true);
1185        if (!cqp_request)
1186                return I40IW_ERR_NO_MEMORY;
1187
1188        cqp_info = &cqp_request->info;
1189        cqp_info->cqp_cmd = OP_CQ_CREATE;
1190        cqp_info->post_sq = 1;
1191        cqp_info->in.u.cq_create.cq = cq;
1192        cqp_info->in.u.cq_create.scratch = (uintptr_t)cqp_request;
1193        status = i40iw_handle_cqp_op(iwdev, cqp_request);
1194        if (status)
1195                i40iw_pr_err("CQP-OP Create QP fail");
1196
1197        return status;
1198}
1199
1200/**
1201 * i40iw_cqp_qp_create_cmd - create a qp for the cqp
1202 * @dev: device pointer
1203 * @qp: pointer to created qp
1204 */
1205enum i40iw_status_code i40iw_cqp_qp_create_cmd(struct i40iw_sc_dev *dev,
1206                                               struct i40iw_sc_qp *qp)
1207{
1208        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1209        struct i40iw_cqp *iwcqp = &iwdev->cqp;
1210        struct i40iw_cqp_request *cqp_request;
1211        struct cqp_commands_info *cqp_info;
1212        struct i40iw_create_qp_info *qp_info;
1213        enum i40iw_status_code status;
1214
1215        cqp_request = i40iw_get_cqp_request(iwcqp, true);
1216        if (!cqp_request)
1217                return I40IW_ERR_NO_MEMORY;
1218
1219        cqp_info = &cqp_request->info;
1220        qp_info = &cqp_request->info.in.u.qp_create.info;
1221
1222        memset(qp_info, 0, sizeof(*qp_info));
1223
1224        qp_info->cq_num_valid = true;
1225        qp_info->next_iwarp_state = I40IW_QP_STATE_RTS;
1226
1227        cqp_info->cqp_cmd = OP_QP_CREATE;
1228        cqp_info->post_sq = 1;
1229        cqp_info->in.u.qp_create.qp = qp;
1230        cqp_info->in.u.qp_create.scratch = (uintptr_t)cqp_request;
1231        status = i40iw_handle_cqp_op(iwdev, cqp_request);
1232        if (status)
1233                i40iw_pr_err("CQP-OP QP create fail");
1234        return status;
1235}
1236
1237/**
1238 * i40iw_cqp_cq_destroy_cmd - destroy the cqp cq
1239 * @dev: device pointer
1240 * @cq: pointer to cq
1241 */
1242void i40iw_cqp_cq_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_cq *cq)
1243{
1244        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1245
1246        i40iw_cq_wq_destroy(iwdev, cq);
1247}
1248
1249/**
1250 * i40iw_cqp_qp_destroy_cmd - destroy the cqp
1251 * @dev: device pointer
1252 * @qp: pointer to qp
1253 */
1254void i40iw_cqp_qp_destroy_cmd(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1255{
1256        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1257        struct i40iw_cqp *iwcqp = &iwdev->cqp;
1258        struct i40iw_cqp_request *cqp_request;
1259        struct cqp_commands_info *cqp_info;
1260        enum i40iw_status_code status;
1261
1262        cqp_request = i40iw_get_cqp_request(iwcqp, true);
1263        if (!cqp_request)
1264                return;
1265
1266        cqp_info = &cqp_request->info;
1267        memset(cqp_info, 0, sizeof(*cqp_info));
1268
1269        cqp_info->cqp_cmd = OP_QP_DESTROY;
1270        cqp_info->post_sq = 1;
1271        cqp_info->in.u.qp_destroy.qp = qp;
1272        cqp_info->in.u.qp_destroy.scratch = (uintptr_t)cqp_request;
1273        cqp_info->in.u.qp_destroy.remove_hash_idx = true;
1274        status = i40iw_handle_cqp_op(iwdev, cqp_request);
1275        if (status)
1276                i40iw_pr_err("CQP QP_DESTROY fail");
1277}
1278
1279
1280/**
1281 * i40iw_ieq_mpa_crc_ae - generate AE for crc error
1282 * @dev: hardware control device structure
1283 * @qp: hardware control qp
1284 */
1285void i40iw_ieq_mpa_crc_ae(struct i40iw_sc_dev *dev, struct i40iw_sc_qp *qp)
1286{
1287        struct i40iw_gen_ae_info info;
1288        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1289
1290        i40iw_debug(dev, I40IW_DEBUG_AEQ, "%s entered\n", __func__);
1291        info.ae_code = I40IW_AE_LLP_RECEIVED_MPA_CRC_ERROR;
1292        info.ae_source = I40IW_AE_SOURCE_RQ;
1293        i40iw_gen_ae(iwdev, qp, &info, false);
1294}
1295
1296/**
1297 * i40iw_init_hash_desc - initialize hash for crc calculation
1298 * @desc: cryption type
1299 */
1300enum i40iw_status_code i40iw_init_hash_desc(struct shash_desc **desc)
1301{
1302        struct crypto_shash *tfm;
1303        struct shash_desc *tdesc;
1304
1305        tfm = crypto_alloc_shash("crc32c", 0, 0);
1306        if (IS_ERR(tfm))
1307                return I40IW_ERR_MPA_CRC;
1308
1309        tdesc = kzalloc(sizeof(*tdesc) + crypto_shash_descsize(tfm),
1310                        GFP_KERNEL);
1311        if (!tdesc) {
1312                crypto_free_shash(tfm);
1313                return I40IW_ERR_MPA_CRC;
1314        }
1315        tdesc->tfm = tfm;
1316        *desc = tdesc;
1317
1318        return 0;
1319}
1320
1321/**
1322 * i40iw_free_hash_desc - free hash desc
1323 * @desc: to be freed
1324 */
1325void i40iw_free_hash_desc(struct shash_desc *desc)
1326{
1327        if (desc) {
1328                crypto_free_shash(desc->tfm);
1329                kfree(desc);
1330        }
1331}
1332
1333/**
1334 * i40iw_alloc_query_fpm_buf - allocate buffer for fpm
1335 * @dev: hardware control device structure
1336 * @mem: buffer ptr for fpm to be allocated
1337 * @return: memory allocation status
1338 */
1339enum i40iw_status_code i40iw_alloc_query_fpm_buf(struct i40iw_sc_dev *dev,
1340                                                 struct i40iw_dma_mem *mem)
1341{
1342        enum i40iw_status_code status;
1343        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1344
1345        status = i40iw_obj_aligned_mem(iwdev, mem, I40IW_QUERY_FPM_BUF_SIZE,
1346                                       I40IW_FPM_QUERY_BUF_ALIGNMENT_MASK);
1347        return status;
1348}
1349
1350/**
1351 * i40iw_ieq_check_mpacrc - check if mpa crc is OK
1352 * @desc: desc for hash
1353 * @addr: address of buffer for crc
1354 * @length: length of buffer
1355 * @value: value to be compared
1356 */
1357enum i40iw_status_code i40iw_ieq_check_mpacrc(struct shash_desc *desc,
1358                                              void *addr,
1359                                              u32 length,
1360                                              u32 value)
1361{
1362        u32 crc = 0;
1363        int ret;
1364        enum i40iw_status_code ret_code = 0;
1365
1366        crypto_shash_init(desc);
1367        ret = crypto_shash_update(desc, addr, length);
1368        if (!ret)
1369                crypto_shash_final(desc, (u8 *)&crc);
1370        if (crc != value) {
1371                i40iw_pr_err("mpa crc check fail\n");
1372                ret_code = I40IW_ERR_MPA_CRC;
1373        }
1374        return ret_code;
1375}
1376
1377/**
1378 * i40iw_ieq_get_qp - get qp based on quad in puda buffer
1379 * @dev: hardware control device structure
1380 * @buf: receive puda buffer on exception q
1381 */
1382struct i40iw_sc_qp *i40iw_ieq_get_qp(struct i40iw_sc_dev *dev,
1383                                     struct i40iw_puda_buf *buf)
1384{
1385        struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev;
1386        struct i40iw_qp *iwqp;
1387        struct i40iw_cm_node *cm_node;
1388        u32 loc_addr[4], rem_addr[4];
1389        u16 loc_port, rem_port;
1390        struct ipv6hdr *ip6h;
1391        struct iphdr *iph = (struct iphdr *)buf->iph;
1392        struct tcphdr *tcph = (struct tcphdr *)buf->tcph;
1393
1394        if (iph->version == 4) {
1395                memset(loc_addr, 0, sizeof(loc_addr));
1396                loc_addr[0] = ntohl(iph->daddr);
1397                memset(rem_addr, 0, sizeof(rem_addr));
1398                rem_addr[0] = ntohl(iph->saddr);
1399        } else {
1400                ip6h = (struct ipv6hdr *)buf->iph;
1401                i40iw_copy_ip_ntohl(loc_addr, ip6h->daddr.in6_u.u6_addr32);
1402                i40iw_copy_ip_ntohl(rem_addr, ip6h->saddr.in6_u.u6_addr32);
1403        }
1404        loc_port = ntohs(tcph->dest);
1405        rem_port = ntohs(tcph->source);
1406
1407        cm_node = i40iw_find_node(&iwdev->cm_core, rem_port, rem_addr, loc_port,
1408                                  loc_addr, false, true);
1409        if (!cm_node)
1410                return NULL;
1411        iwqp = cm_node->iwqp;
1412        return &iwqp->sc_qp;
1413}
1414
1415/**
1416 * i40iw_ieq_update_tcpip_info - update tcpip in the buffer
1417 * @buf: puda to update
1418 * @length: length of buffer
1419 * @seqnum: seq number for tcp
1420 */
1421void i40iw_ieq_update_tcpip_info(struct i40iw_puda_buf *buf, u16 length, u32 seqnum)
1422{
1423        struct tcphdr *tcph;
1424        struct iphdr *iph;
1425        u16 iphlen;
1426        u16 packetsize;
1427        u8 *addr = (u8 *)buf->mem.va;
1428
1429        iphlen = (buf->ipv4) ? 20 : 40;
1430        iph = (struct iphdr *)(addr + buf->maclen);
1431        tcph = (struct tcphdr *)(addr + buf->maclen + iphlen);
1432        packetsize = length + buf->tcphlen + iphlen;
1433
1434        iph->tot_len = htons(packetsize);
1435        tcph->seq = htonl(seqnum);
1436}
1437
1438/**
1439 * i40iw_puda_get_tcpip_info - get tcpip info from puda buffer
1440 * @info: to get information
1441 * @buf: puda buffer
1442 */
1443enum i40iw_status_code i40iw_puda_get_tcpip_info(struct i40iw_puda_completion_info *info,
1444                                                 struct i40iw_puda_buf *buf)
1445{
1446        struct iphdr *iph;
1447        struct ipv6hdr *ip6h;
1448        struct tcphdr *tcph;
1449        u16 iphlen;
1450        u16 pkt_len;
1451        u8 *mem = (u8 *)buf->mem.va;
1452        struct ethhdr *ethh = (struct ethhdr *)buf->mem.va;
1453
1454        if (ethh->h_proto == htons(0x8100)) {
1455                info->vlan_valid = true;
1456                buf->vlan_id = ntohs(((struct vlan_ethhdr *)ethh)->h_vlan_TCI) & VLAN_VID_MASK;
1457        }
1458        buf->maclen = (info->vlan_valid) ? 18 : 14;
1459        iphlen = (info->l3proto) ? 40 : 20;
1460        buf->ipv4 = (info->l3proto) ? false : true;
1461        buf->iph = mem + buf->maclen;
1462        iph = (struct iphdr *)buf->iph;
1463
1464        buf->tcph = buf->iph + iphlen;
1465        tcph = (struct tcphdr *)buf->tcph;
1466
1467        if (buf->ipv4) {
1468                pkt_len = ntohs(iph->tot_len);
1469        } else {
1470                ip6h = (struct ipv6hdr *)buf->iph;
1471                pkt_len = ntohs(ip6h->payload_len) + iphlen;
1472        }
1473
1474        buf->totallen = pkt_len + buf->maclen;
1475
1476        if (info->payload_len < buf->totallen) {
1477                i40iw_pr_err("payload_len = 0x%x totallen expected0x%x\n",
1478                             info->payload_len, buf->totallen);
1479                return I40IW_ERR_INVALID_SIZE;
1480        }
1481
1482        buf->tcphlen = (tcph->doff) << 2;
1483        buf->datalen = pkt_len - iphlen - buf->tcphlen;
1484        buf->data = (buf->datalen) ? buf->tcph + buf->tcphlen : NULL;
1485        buf->hdrlen = buf->maclen + iphlen + buf->tcphlen;
1486        buf->seqnum = ntohl(tcph->seq);
1487        return 0;
1488}
1489
1490/**
1491 * i40iw_hw_stats_timeout - Stats timer-handler which updates all HW stats
1492 * @vsi: pointer to the vsi structure
1493 */
1494static void i40iw_hw_stats_timeout(struct timer_list *t)
1495{
1496        struct i40iw_vsi_pestat *pf_devstat = from_timer(pf_devstat, t,
1497                                                       stats_timer);
1498        struct i40iw_sc_vsi *sc_vsi = pf_devstat->vsi;
1499        struct i40iw_sc_dev *pf_dev = sc_vsi->dev;
1500        struct i40iw_vsi_pestat *vf_devstat = NULL;
1501        u16 iw_vf_idx;
1502        unsigned long flags;
1503
1504        /*PF*/
1505        i40iw_hw_stats_read_all(pf_devstat, &pf_devstat->hw_stats);
1506
1507        for (iw_vf_idx = 0; iw_vf_idx < I40IW_MAX_PE_ENABLED_VF_COUNT; iw_vf_idx++) {
1508                spin_lock_irqsave(&pf_devstat->lock, flags);
1509                if (pf_dev->vf_dev[iw_vf_idx]) {
1510                        if (pf_dev->vf_dev[iw_vf_idx]->stats_initialized) {
1511                                vf_devstat = &pf_dev->vf_dev[iw_vf_idx]->pestat;
1512                                i40iw_hw_stats_read_all(vf_devstat, &vf_devstat->hw_stats);
1513                        }
1514                }
1515                spin_unlock_irqrestore(&pf_devstat->lock, flags);
1516        }
1517
1518        mod_timer(&pf_devstat->stats_timer,
1519                  jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1520}
1521
1522/**
1523 * i40iw_hw_stats_start_timer - Start periodic stats timer
1524 * @vsi: pointer to the vsi structure
1525 */
1526void i40iw_hw_stats_start_timer(struct i40iw_sc_vsi *vsi)
1527{
1528        struct i40iw_vsi_pestat *devstat = vsi->pestat;
1529
1530        timer_setup(&devstat->stats_timer, i40iw_hw_stats_timeout, 0);
1531        mod_timer(&devstat->stats_timer,
1532                  jiffies + msecs_to_jiffies(STATS_TIMER_DELAY));
1533}
1534
1535/**
1536 * i40iw_hw_stats_stop_timer - Delete periodic stats timer
1537 * @vsi: pointer to the vsi structure
1538 */
1539void i40iw_hw_stats_stop_timer(struct i40iw_sc_vsi *vsi)
1540{
1541        struct i40iw_vsi_pestat *devstat = vsi->pestat;
1542
1543        del_timer_sync(&devstat->stats_timer);
1544}
1545