drivers/infiniband/hw/ocrdma/ocrdma_verbs.c

   1 /* This file is part of the Emulex RoCE Device Driver for
   2  * RoCE (RDMA over Converged Ethernet) adapters.
   3  * Copyright (C) 2012-2015 Emulex. All rights reserved.
   4  * EMULEX and SLI are trademarks of Emulex.
   5  * www.emulex.com
   6  *
   7  * This software is available to you under a choice of one of two licenses.
   8  * You may choose to be licensed under the terms of the GNU General Public
   9  * License (GPL) Version 2, available from the file COPYING in the main
  10  * directory of this source tree, or the BSD license below:
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  *
  16  * - Redistributions of source code must retain the above copyright notice,
  17  *   this list of conditions and the following disclaimer.
  18  *
  19  * - Redistributions in binary form must reproduce the above copyright
  20  *   notice, this list of conditions and the following disclaimer in
  21  *   the documentation and/or other materials provided with the distribution.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  30  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  31  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  32  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  33  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  * Contact Information:
  36  * linux-drivers@emulex.com
  37  *
  38  * Emulex
  39  * 3333 Susan Street
  40  * Costa Mesa, CA 92626
  41  */
  42
  43 #include <linux/dma-mapping.h>
  44 #include <rdma/ib_verbs.h>
  45 #include <rdma/ib_user_verbs.h>
  46 #include <rdma/iw_cm.h>
  47 #include <rdma/ib_umem.h>
  48 #include <rdma/ib_addr.h>
  49 #include <rdma/ib_cache.h>
  50
  51 #include "ocrdma.h"
  52 #include "ocrdma_hw.h"
  53 #include "ocrdma_verbs.h"
  54 #include <rdma/ocrdma-abi.h>
  55
  56 int ocrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
  57 {
  58         if (index > 1)
  59                 return -EINVAL;
  60
  61         *pkey = 0xffff;
  62         return 0;
  63 }
  64
  65 int ocrdma_query_gid(struct ib_device *ibdev, u8 port,
  66                      int index, union ib_gid *sgid)
  67 {
  68         int ret;
  69         struct ocrdma_dev *dev;
  70
  71         dev = get_ocrdma_dev(ibdev);
  72         memset(sgid, 0, sizeof(*sgid));
  73         if (index >= OCRDMA_MAX_SGID)
  74                 return -EINVAL;
  75
  76         ret = ib_get_cached_gid(ibdev, port, index, sgid, NULL);
  77         if (ret == -EAGAIN) {
  78                 memcpy(sgid, &zgid, sizeof(*sgid));
  79                 return 0;
  80         }
  81
  82         return ret;
  83 }
  84
  85 int ocrdma_add_gid(struct ib_device *device,
  86                    u8 port_num,
  87                    unsigned int index,
  88                    const union ib_gid *gid,
  89                    const struct ib_gid_attr *attr,
  90                    void **context) {
  91         return  0;
  92 }
  93
  94 int  ocrdma_del_gid(struct ib_device *device,
  95                     u8 port_num,
  96                     unsigned int index,
  97                     void **context) {
  98         return 0;
  99 }
 100
 101 int ocrdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr,
 102                         struct ib_udata *uhw)
 103 {
 104         struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
 105
 106         if (uhw->inlen || uhw->outlen)
 107                 return -EINVAL;
 108
 109         memset(attr, 0, sizeof *attr);
 110         memcpy(&attr->fw_ver, &dev->attr.fw_ver[0],
 111                min(sizeof(dev->attr.fw_ver), sizeof(attr->fw_ver)));
 112         ocrdma_get_guid(dev, (u8 *)&attr->sys_image_guid);
 113         attr->max_mr_size = dev->attr.max_mr_size;
 114         attr->page_size_cap = 0xffff000;
 115         attr->vendor_id = dev->nic_info.pdev->vendor;
 116         attr->vendor_part_id = dev->nic_info.pdev->device;
 117         attr->hw_ver = dev->asic_id;
 118         attr->max_qp = dev->attr.max_qp;
 119         attr->max_ah = OCRDMA_MAX_AH;
 120         attr->max_qp_wr = dev->attr.max_wqe;
 121
 122         attr->device_cap_flags = IB_DEVICE_CURR_QP_STATE_MOD |
 123                                         IB_DEVICE_RC_RNR_NAK_GEN |
 124                                         IB_DEVICE_SHUTDOWN_PORT |
 125                                         IB_DEVICE_SYS_IMAGE_GUID |
 126                                         IB_DEVICE_LOCAL_DMA_LKEY |
 127                                         IB_DEVICE_MEM_MGT_EXTENSIONS;
 128         attr->max_sge = min(dev->attr.max_send_sge, dev->attr.max_recv_sge);
 129         attr->max_sge_rd = dev->attr.max_rdma_sge;
 130         attr->max_cq = dev->attr.max_cq;
 131         attr->max_cqe = dev->attr.max_cqe;
 132         attr->max_mr = dev->attr.max_mr;
 133         attr->max_mw = dev->attr.max_mw;
 134         attr->max_pd = dev->attr.max_pd;
 135         attr->atomic_cap = 0;
 136         attr->max_fmr = 0;
 137         attr->max_map_per_fmr = 0;
 138         attr->max_qp_rd_atom =
 139             min(dev->attr.max_ord_per_qp, dev->attr.max_ird_per_qp);
 140         attr->max_qp_init_rd_atom = dev->attr.max_ord_per_qp;
 141         attr->max_srq = dev->attr.max_srq;
 142         attr->max_srq_sge = dev->attr.max_srq_sge;
 143         attr->max_srq_wr = dev->attr.max_rqe;
 144         attr->local_ca_ack_delay = dev->attr.local_ca_ack_delay;
 145         attr->max_fast_reg_page_list_len = dev->attr.max_pages_per_frmr;
 146         attr->max_pkeys = 1;
 147         return 0;
 148 }
 149
 150 struct net_device *ocrdma_get_netdev(struct ib_device *ibdev, u8 port_num)
 151 {
 152         struct ocrdma_dev *dev;
 153         struct net_device *ndev = NULL;
 154
 155         rcu_read_lock();
 156
 157         dev = get_ocrdma_dev(ibdev);
 158         if (dev)
 159                 ndev = dev->nic_info.netdev;
 160         if (ndev)
 161                 dev_hold(ndev);
 162
 163         rcu_read_unlock();
 164
 165         return ndev;
 166 }
 167
 168 static inline void get_link_speed_and_width(struct ocrdma_dev *dev,
 169                                             u8 *ib_speed, u8 *ib_width)
 170 {
 171         int status;
 172         u8 speed;
 173
 174         status = ocrdma_mbx_get_link_speed(dev, &speed, NULL);
 175         if (status)
 176                 speed = OCRDMA_PHYS_LINK_SPEED_ZERO;
 177
 178         switch (speed) {
 179         case OCRDMA_PHYS_LINK_SPEED_1GBPS:
 180                 *ib_speed = IB_SPEED_SDR;
 181                 *ib_width = IB_WIDTH_1X;
 182                 break;
 183
 184         case OCRDMA_PHYS_LINK_SPEED_10GBPS:
 185                 *ib_speed = IB_SPEED_QDR;
 186                 *ib_width = IB_WIDTH_1X;
 187                 break;
 188
 189         case OCRDMA_PHYS_LINK_SPEED_20GBPS:
 190                 *ib_speed = IB_SPEED_DDR;
 191                 *ib_width = IB_WIDTH_4X;
 192                 break;
 193
 194         case OCRDMA_PHYS_LINK_SPEED_40GBPS:
 195                 *ib_speed = IB_SPEED_QDR;
 196                 *ib_width = IB_WIDTH_4X;
 197                 break;
 198
 199         default:
 200                 /* Unsupported */
 201                 *ib_speed = IB_SPEED_SDR;
 202                 *ib_width = IB_WIDTH_1X;
 203         }
 204 }
 205
 206 int ocrdma_query_port(struct ib_device *ibdev,
 207                       u8 port, struct ib_port_attr *props)
 208 {
 209         enum ib_port_state port_state;
 210         struct ocrdma_dev *dev;
 211         struct net_device *netdev;
 212
 213         /* props being zeroed by the caller, avoid zeroing it here */
 214         dev = get_ocrdma_dev(ibdev);
 215         if (port > 1) {
 216                 pr_err("%s(%d) invalid_port=0x%x\n", __func__,
 217                        dev->id, port);
 218                 return -EINVAL;
 219         }
 220         netdev = dev->nic_info.netdev;
 221         if (netif_running(netdev) && netif_oper_up(netdev)) {
 222                 port_state = IB_PORT_ACTIVE;
 223                 props->phys_state = 5;
 224         } else {
 225                 port_state = IB_PORT_DOWN;
 226                 props->phys_state = 3;
 227         }
 228         props->max_mtu = IB_MTU_4096;
 229         props->active_mtu = iboe_get_mtu(netdev->mtu);
 230         props->lid = 0;
 231         props->lmc = 0;
 232         props->sm_lid = 0;
 233         props->sm_sl = 0;
 234         props->state = port_state;
 235         props->port_cap_flags =
 236             IB_PORT_CM_SUP |
 237             IB_PORT_REINIT_SUP |
 238             IB_PORT_DEVICE_MGMT_SUP | IB_PORT_VENDOR_CLASS_SUP |
 239             IB_PORT_IP_BASED_GIDS;
 240         props->gid_tbl_len = OCRDMA_MAX_SGID;
 241         props->pkey_tbl_len = 1;
 242         props->bad_pkey_cntr = 0;
 243         props->qkey_viol_cntr = 0;
 244         get_link_speed_and_width(dev, &props->active_speed,
 245                                  &props->active_width);
 246         props->max_msg_sz = 0x80000000;
 247         props->max_vl_num = 4;
 248         return 0;
 249 }
 250
 251 int ocrdma_modify_port(struct ib_device *ibdev, u8 port, int mask,
 252                        struct ib_port_modify *props)
 253 {
 254         struct ocrdma_dev *dev;
 255
 256         dev = get_ocrdma_dev(ibdev);
 257         if (port > 1) {
 258                 pr_err("%s(%d) invalid_port=0x%x\n", __func__, dev->id, port);
 259                 return -EINVAL;
 260         }
 261         return 0;
 262 }
 263
 264 static int ocrdma_add_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
 265                            unsigned long len)
 266 {
 267         struct ocrdma_mm *mm;
 268
 269         mm = kzalloc(sizeof(*mm), GFP_KERNEL);
 270         if (mm == NULL)
 271                 return -ENOMEM;
 272         mm->key.phy_addr = phy_addr;
 273         mm->key.len = len;
 274         INIT_LIST_HEAD(&mm->entry);
 275
 276         mutex_lock(&uctx->mm_list_lock);
 277         list_add_tail(&mm->entry, &uctx->mm_head);
 278         mutex_unlock(&uctx->mm_list_lock);
 279         return 0;
 280 }
 281
 282 static void ocrdma_del_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
 283                             unsigned long len)
 284 {
 285         struct ocrdma_mm *mm, *tmp;
 286
 287         mutex_lock(&uctx->mm_list_lock);
 288         list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
 289                 if (len != mm->key.len && phy_addr != mm->key.phy_addr)
 290                         continue;
 291
 292                 list_del(&mm->entry);
 293                 kfree(mm);
 294                 break;
 295         }
 296         mutex_unlock(&uctx->mm_list_lock);
 297 }
 298
 299 static bool ocrdma_search_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
 300                               unsigned long len)
 301 {
 302         bool found = false;
 303         struct ocrdma_mm *mm;
 304
 305         mutex_lock(&uctx->mm_list_lock);
 306         list_for_each_entry(mm, &uctx->mm_head, entry) {
 307                 if (len != mm->key.len && phy_addr != mm->key.phy_addr)
 308                         continue;
 309
 310                 found = true;
 311                 break;
 312         }
 313         mutex_unlock(&uctx->mm_list_lock);
 314         return found;
 315 }
 316
 317
 318 static u16 _ocrdma_pd_mgr_get_bitmap(struct ocrdma_dev *dev, bool dpp_pool)
 319 {
 320         u16 pd_bitmap_idx = 0;
 321         const unsigned long *pd_bitmap;
 322
 323         if (dpp_pool) {
 324                 pd_bitmap = dev->pd_mgr->pd_dpp_bitmap;
 325                 pd_bitmap_idx = find_first_zero_bit(pd_bitmap,
 326                                                     dev->pd_mgr->max_dpp_pd);
 327                 __set_bit(pd_bitmap_idx, dev->pd_mgr->pd_dpp_bitmap);
 328                 dev->pd_mgr->pd_dpp_count++;
 329                 if (dev->pd_mgr->pd_dpp_count > dev->pd_mgr->pd_dpp_thrsh)
 330                         dev->pd_mgr->pd_dpp_thrsh = dev->pd_mgr->pd_dpp_count;
 331         } else {
 332                 pd_bitmap = dev->pd_mgr->pd_norm_bitmap;
 333                 pd_bitmap_idx = find_first_zero_bit(pd_bitmap,
 334                                                     dev->pd_mgr->max_normal_pd);
 335                 __set_bit(pd_bitmap_idx, dev->pd_mgr->pd_norm_bitmap);
 336                 dev->pd_mgr->pd_norm_count++;
 337                 if (dev->pd_mgr->pd_norm_count > dev->pd_mgr->pd_norm_thrsh)
 338                         dev->pd_mgr->pd_norm_thrsh = dev->pd_mgr->pd_norm_count;
 339         }
 340         return pd_bitmap_idx;
 341 }
 342
 343 static int _ocrdma_pd_mgr_put_bitmap(struct ocrdma_dev *dev, u16 pd_id,
 344                                         bool dpp_pool)
 345 {
 346         u16 pd_count;
 347         u16 pd_bit_index;
 348
 349         pd_count = dpp_pool ? dev->pd_mgr->pd_dpp_count :
 350                               dev->pd_mgr->pd_norm_count;
 351         if (pd_count == 0)
 352                 return -EINVAL;
 353
 354         if (dpp_pool) {
 355                 pd_bit_index = pd_id - dev->pd_mgr->pd_dpp_start;
 356                 if (pd_bit_index >= dev->pd_mgr->max_dpp_pd) {
 357                         return -EINVAL;
 358                 } else {
 359                         __clear_bit(pd_bit_index, dev->pd_mgr->pd_dpp_bitmap);
 360                         dev->pd_mgr->pd_dpp_count--;
 361                 }
 362         } else {
 363                 pd_bit_index = pd_id - dev->pd_mgr->pd_norm_start;
 364                 if (pd_bit_index >= dev->pd_mgr->max_normal_pd) {
 365                         return -EINVAL;
 366                 } else {
 367                         __clear_bit(pd_bit_index, dev->pd_mgr->pd_norm_bitmap);
 368                         dev->pd_mgr->pd_norm_count--;
 369                 }
 370         }
 371
 372         return 0;
 373 }
 374
 375 static int ocrdma_put_pd_num(struct ocrdma_dev *dev, u16 pd_id,
 376                                    bool dpp_pool)
 377 {
 378         int status;
 379
 380         mutex_lock(&dev->dev_lock);
 381         status = _ocrdma_pd_mgr_put_bitmap(dev, pd_id, dpp_pool);
 382         mutex_unlock(&dev->dev_lock);
 383         return status;
 384 }
 385
 386 static int ocrdma_get_pd_num(struct ocrdma_dev *dev, struct ocrdma_pd *pd)
 387 {
 388         u16 pd_idx = 0;
 389         int status = 0;
 390
 391         mutex_lock(&dev->dev_lock);
 392         if (pd->dpp_enabled) {
 393                 /* try allocating DPP PD, if not available then normal PD */
 394                 if (dev->pd_mgr->pd_dpp_count < dev->pd_mgr->max_dpp_pd) {
 395                         pd_idx = _ocrdma_pd_mgr_get_bitmap(dev, true);
 396                         pd->id = dev->pd_mgr->pd_dpp_start + pd_idx;
 397                         pd->dpp_page = dev->pd_mgr->dpp_page_index + pd_idx;
 398                 } else if (dev->pd_mgr->pd_norm_count <
 399                            dev->pd_mgr->max_normal_pd) {
 400                         pd_idx = _ocrdma_pd_mgr_get_bitmap(dev, false);
 401                         pd->id = dev->pd_mgr->pd_norm_start + pd_idx;
 402                         pd->dpp_enabled = false;
 403                 } else {
 404                         status = -EINVAL;
 405                 }
 406         } else {
 407                 if (dev->pd_mgr->pd_norm_count < dev->pd_mgr->max_normal_pd) {
 408                         pd_idx = _ocrdma_pd_mgr_get_bitmap(dev, false);
 409                         pd->id = dev->pd_mgr->pd_norm_start + pd_idx;
 410                 } else {
 411                         status = -EINVAL;
 412                 }
 413         }
 414         mutex_unlock(&dev->dev_lock);
 415         return status;
 416 }
 417
 418 static struct ocrdma_pd *_ocrdma_alloc_pd(struct ocrdma_dev *dev,
 419                                           struct ocrdma_ucontext *uctx,
 420                                           struct ib_udata *udata)
 421 {
 422         struct ocrdma_pd *pd = NULL;
 423         int status;
 424
 425         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 426         if (!pd)
 427                 return ERR_PTR(-ENOMEM);
 428
 429         if (udata && uctx && dev->attr.max_dpp_pds) {
 430                 pd->dpp_enabled =
 431                         ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R;
 432                 pd->num_dpp_qp =
 433                         pd->dpp_enabled ? (dev->nic_info.db_page_size /
 434                                            dev->attr.wqe_size) : 0;
 435         }
 436
 437         if (dev->pd_mgr->pd_prealloc_valid) {
 438                 status = ocrdma_get_pd_num(dev, pd);
 439                 if (status == 0) {
 440                         return pd;
 441                 } else {
 442                         kfree(pd);
 443                         return ERR_PTR(status);
 444                 }
 445         }
 446
 447 retry:
 448         status = ocrdma_mbx_alloc_pd(dev, pd);
 449         if (status) {
 450                 if (pd->dpp_enabled) {
 451                         pd->dpp_enabled = false;
 452                         pd->num_dpp_qp = 0;
 453                         goto retry;
 454                 } else {
 455                         kfree(pd);
 456                         return ERR_PTR(status);
 457                 }
 458         }
 459
 460         return pd;
 461 }
 462
 463 static inline int is_ucontext_pd(struct ocrdma_ucontext *uctx,
 464                                  struct ocrdma_pd *pd)
 465 {
 466         return (uctx->cntxt_pd == pd ? true : false);
 467 }
 468
 469 static int _ocrdma_dealloc_pd(struct ocrdma_dev *dev,
 470                               struct ocrdma_pd *pd)
 471 {
 472         int status;
 473
 474         if (dev->pd_mgr->pd_prealloc_valid)
 475                 status = ocrdma_put_pd_num(dev, pd->id, pd->dpp_enabled);
 476         else
 477                 status = ocrdma_mbx_dealloc_pd(dev, pd);
 478
 479         kfree(pd);
 480         return status;
 481 }
 482
 483 static int ocrdma_alloc_ucontext_pd(struct ocrdma_dev *dev,
 484                                     struct ocrdma_ucontext *uctx,
 485                                     struct ib_udata *udata)
 486 {
 487         int status = 0;
 488
 489         uctx->cntxt_pd = _ocrdma_alloc_pd(dev, uctx, udata);
 490         if (IS_ERR(uctx->cntxt_pd)) {
 491                 status = PTR_ERR(uctx->cntxt_pd);
 492                 uctx->cntxt_pd = NULL;
 493                 goto err;
 494         }
 495
 496         uctx->cntxt_pd->uctx = uctx;
 497         uctx->cntxt_pd->ibpd.device = &dev->ibdev;
 498 err:
 499         return status;
 500 }
 501
 502 static int ocrdma_dealloc_ucontext_pd(struct ocrdma_ucontext *uctx)
 503 {
 504         struct ocrdma_pd *pd = uctx->cntxt_pd;
 505         struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
 506
 507         if (uctx->pd_in_use) {
 508                 pr_err("%s(%d) Freeing in use pdid=0x%x.\n",
 509                        __func__, dev->id, pd->id);
 510         }
 511         uctx->cntxt_pd = NULL;
 512         (void)_ocrdma_dealloc_pd(dev, pd);
 513         return 0;
 514 }
 515
 516 static struct ocrdma_pd *ocrdma_get_ucontext_pd(struct ocrdma_ucontext *uctx)
 517 {
 518         struct ocrdma_pd *pd = NULL;
 519
 520         mutex_lock(&uctx->mm_list_lock);
 521         if (!uctx->pd_in_use) {
 522                 uctx->pd_in_use = true;
 523                 pd = uctx->cntxt_pd;
 524         }
 525         mutex_unlock(&uctx->mm_list_lock);
 526
 527         return pd;
 528 }
 529
 530 static void ocrdma_release_ucontext_pd(struct ocrdma_ucontext *uctx)
 531 {
 532         mutex_lock(&uctx->mm_list_lock);
 533         uctx->pd_in_use = false;
 534         mutex_unlock(&uctx->mm_list_lock);
 535 }
 536
 537 struct ib_ucontext *ocrdma_alloc_ucontext(struct ib_device *ibdev,
 538                                           struct ib_udata *udata)
 539 {
 540         int status;
 541         struct ocrdma_ucontext *ctx;
 542         struct ocrdma_alloc_ucontext_resp resp;
 543         struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
 544         struct pci_dev *pdev = dev->nic_info.pdev;
 545         u32 map_len = roundup(sizeof(u32) * 2048, PAGE_SIZE);
 546
 547         if (!udata)
 548                 return ERR_PTR(-EFAULT);
 549         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 550         if (!ctx)
 551                 return ERR_PTR(-ENOMEM);
 552         INIT_LIST_HEAD(&ctx->mm_head);
 553         mutex_init(&ctx->mm_list_lock);
 554
 555         ctx->ah_tbl.va = dma_alloc_coherent(&pdev->dev, map_len,
 556                                             &ctx->ah_tbl.pa, GFP_KERNEL);
 557         if (!ctx->ah_tbl.va) {
 558                 kfree(ctx);
 559                 return ERR_PTR(-ENOMEM);
 560         }
 561         memset(ctx->ah_tbl.va, 0, map_len);
 562         ctx->ah_tbl.len = map_len;
 563
 564         memset(&resp, 0, sizeof(resp));
 565         resp.ah_tbl_len = ctx->ah_tbl.len;
 566         resp.ah_tbl_page = virt_to_phys(ctx->ah_tbl.va);
 567
 568         status = ocrdma_add_mmap(ctx, resp.ah_tbl_page, resp.ah_tbl_len);
 569         if (status)
 570                 goto map_err;
 571
 572         status = ocrdma_alloc_ucontext_pd(dev, ctx, udata);
 573         if (status)
 574                 goto pd_err;
 575
 576         resp.dev_id = dev->id;
 577         resp.max_inline_data = dev->attr.max_inline_data;
 578         resp.wqe_size = dev->attr.wqe_size;
 579         resp.rqe_size = dev->attr.rqe_size;
 580         resp.dpp_wqe_size = dev->attr.wqe_size;
 581
 582         memcpy(resp.fw_ver, dev->attr.fw_ver, sizeof(resp.fw_ver));
 583         status = ib_copy_to_udata(udata, &resp, sizeof(resp));
 584         if (status)
 585                 goto cpy_err;
 586         return &ctx->ibucontext;
 587
 588 cpy_err:
 589 pd_err:
 590         ocrdma_del_mmap(ctx, ctx->ah_tbl.pa, ctx->ah_tbl.len);
 591 map_err:
 592         dma_free_coherent(&pdev->dev, ctx->ah_tbl.len, ctx->ah_tbl.va,
 593                           ctx->ah_tbl.pa);
 594         kfree(ctx);
 595         return ERR_PTR(status);
 596 }
 597
 598 int ocrdma_dealloc_ucontext(struct ib_ucontext *ibctx)
 599 {
 600         int status;
 601         struct ocrdma_mm *mm, *tmp;
 602         struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ibctx);
 603         struct ocrdma_dev *dev = get_ocrdma_dev(ibctx->device);
 604         struct pci_dev *pdev = dev->nic_info.pdev;
 605
 606         status = ocrdma_dealloc_ucontext_pd(uctx);
 607
 608         ocrdma_del_mmap(uctx, uctx->ah_tbl.pa, uctx->ah_tbl.len);
 609         dma_free_coherent(&pdev->dev, uctx->ah_tbl.len, uctx->ah_tbl.va,
 610                           uctx->ah_tbl.pa);
 611
 612         list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
 613                 list_del(&mm->entry);
 614                 kfree(mm);
 615         }
 616         kfree(uctx);
 617         return status;
 618 }
 619
 620 int ocrdma_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 621 {
 622         struct ocrdma_ucontext *ucontext = get_ocrdma_ucontext(context);
 623         struct ocrdma_dev *dev = get_ocrdma_dev(context->device);
 624         unsigned long vm_page = vma->vm_pgoff << PAGE_SHIFT;
 625         u64 unmapped_db = (u64) dev->nic_info.unmapped_db;
 626         unsigned long len = (vma->vm_end - vma->vm_start);
 627         int status;
 628         bool found;
 629
 630         if (vma->vm_start & (PAGE_SIZE - 1))
 631                 return -EINVAL;
 632         found = ocrdma_search_mmap(ucontext, vma->vm_pgoff << PAGE_SHIFT, len);
 633         if (!found)
 634                 return -EINVAL;
 635
 636         if ((vm_page >= unmapped_db) && (vm_page <= (unmapped_db +
 637                 dev->nic_info.db_total_size)) &&
 638                 (len <= dev->nic_info.db_page_size)) {
 639                 if (vma->vm_flags & VM_READ)
 640                         return -EPERM;
 641
 642                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 643                 status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
 644                                             len, vma->vm_page_prot);
 645         } else if (dev->nic_info.dpp_unmapped_len &&
 646                 (vm_page >= (u64) dev->nic_info.dpp_unmapped_addr) &&
 647                 (vm_page <= (u64) (dev->nic_info.dpp_unmapped_addr +
 648                         dev->nic_info.dpp_unmapped_len)) &&
 649                 (len <= dev->nic_info.dpp_unmapped_len)) {
 650                 if (vma->vm_flags & VM_READ)
 651                         return -EPERM;
 652
 653                 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
 654                 status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
 655                                             len, vma->vm_page_prot);
 656         } else {
 657                 status = remap_pfn_range(vma, vma->vm_start,
 658                                          vma->vm_pgoff, len, vma->vm_page_prot);
 659         }
 660         return status;
 661 }
 662
 663 static int ocrdma_copy_pd_uresp(struct ocrdma_dev *dev, struct ocrdma_pd *pd,
 664                                 struct ib_ucontext *ib_ctx,
 665                                 struct ib_udata *udata)
 666 {
 667         int status;
 668         u64 db_page_addr;
 669         u64 dpp_page_addr = 0;
 670         u32 db_page_size;
 671         struct ocrdma_alloc_pd_uresp rsp;
 672         struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ib_ctx);
 673
 674         memset(&rsp, 0, sizeof(rsp));
 675         rsp.id = pd->id;
 676         rsp.dpp_enabled = pd->dpp_enabled;
 677         db_page_addr = ocrdma_get_db_addr(dev, pd->id);
 678         db_page_size = dev->nic_info.db_page_size;
 679
 680         status = ocrdma_add_mmap(uctx, db_page_addr, db_page_size);
 681         if (status)
 682                 return status;
 683
 684         if (pd->dpp_enabled) {
 685                 dpp_page_addr = dev->nic_info.dpp_unmapped_addr +
 686                                 (pd->id * PAGE_SIZE);
 687                 status = ocrdma_add_mmap(uctx, dpp_page_addr,
 688                                  PAGE_SIZE);
 689                 if (status)
 690                         goto dpp_map_err;
 691                 rsp.dpp_page_addr_hi = upper_32_bits(dpp_page_addr);
 692                 rsp.dpp_page_addr_lo = dpp_page_addr;
 693         }
 694
 695         status = ib_copy_to_udata(udata, &rsp, sizeof(rsp));
 696         if (status)
 697                 goto ucopy_err;
 698
 699         pd->uctx = uctx;
 700         return 0;
 701
 702 ucopy_err:
 703         if (pd->dpp_enabled)
 704                 ocrdma_del_mmap(pd->uctx, dpp_page_addr, PAGE_SIZE);
 705 dpp_map_err:
 706         ocrdma_del_mmap(pd->uctx, db_page_addr, db_page_size);
 707         return status;
 708 }
 709
 710 struct ib_pd *ocrdma_alloc_pd(struct ib_device *ibdev,
 711                               struct ib_ucontext *context,
 712                               struct ib_udata *udata)
 713 {
 714         struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
 715         struct ocrdma_pd *pd;
 716         struct ocrdma_ucontext *uctx = NULL;
 717         int status;
 718         u8 is_uctx_pd = false;
 719
 720         if (udata && context) {
 721                 uctx = get_ocrdma_ucontext(context);
 722                 pd = ocrdma_get_ucontext_pd(uctx);
 723                 if (pd) {
 724                         is_uctx_pd = true;
 725                         goto pd_mapping;
 726                 }
 727         }
 728
 729         pd = _ocrdma_alloc_pd(dev, uctx, udata);
 730         if (IS_ERR(pd)) {
 731                 status = PTR_ERR(pd);
 732                 goto exit;
 733         }
 734
 735 pd_mapping:
 736         if (udata && context) {
 737                 status = ocrdma_copy_pd_uresp(dev, pd, context, udata);
 738                 if (status)
 739                         goto err;
 740         }
 741         return &pd->ibpd;
 742
 743 err:
 744         if (is_uctx_pd) {
 745                 ocrdma_release_ucontext_pd(uctx);
 746         } else {
 747                 status = _ocrdma_dealloc_pd(dev, pd);
 748         }
 749 exit:
 750         return ERR_PTR(status);
 751 }
 752
 753 int ocrdma_dealloc_pd(struct ib_pd *ibpd)
 754 {
 755         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
 756         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
 757         struct ocrdma_ucontext *uctx = NULL;
 758         int status = 0;
 759         u64 usr_db;
 760
 761         uctx = pd->uctx;
 762         if (uctx) {
 763                 u64 dpp_db = dev->nic_info.dpp_unmapped_addr +
 764                         (pd->id * PAGE_SIZE);
 765                 if (pd->dpp_enabled)
 766                         ocrdma_del_mmap(pd->uctx, dpp_db, PAGE_SIZE);
 767                 usr_db = ocrdma_get_db_addr(dev, pd->id);
 768                 ocrdma_del_mmap(pd->uctx, usr_db, dev->nic_info.db_page_size);
 769
 770                 if (is_ucontext_pd(uctx, pd)) {
 771                         ocrdma_release_ucontext_pd(uctx);
 772                         return status;
 773                 }
 774         }
 775         status = _ocrdma_dealloc_pd(dev, pd);
 776         return status;
 777 }
 778
 779 static int ocrdma_alloc_lkey(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
 780                             u32 pdid, int acc, u32 num_pbls, u32 addr_check)
 781 {
 782         int status;
 783
 784         mr->hwmr.fr_mr = 0;
 785         mr->hwmr.local_rd = 1;
 786         mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
 787         mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
 788         mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
 789         mr->hwmr.mw_bind = (acc & IB_ACCESS_MW_BIND) ? 1 : 0;
 790         mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
 791         mr->hwmr.num_pbls = num_pbls;
 792
 793         status = ocrdma_mbx_alloc_lkey(dev, &mr->hwmr, pdid, addr_check);
 794         if (status)
 795                 return status;
 796
 797         mr->ibmr.lkey = mr->hwmr.lkey;
 798         if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
 799                 mr->ibmr.rkey = mr->hwmr.lkey;
 800         return 0;
 801 }
 802
 803 struct ib_mr *ocrdma_get_dma_mr(struct ib_pd *ibpd, int acc)
 804 {
 805         int status;
 806         struct ocrdma_mr *mr;
 807         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
 808         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
 809
 810         if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE)) {
 811                 pr_err("%s err, invalid access rights\n", __func__);
 812                 return ERR_PTR(-EINVAL);
 813         }
 814
 815         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 816         if (!mr)
 817                 return ERR_PTR(-ENOMEM);
 818
 819         status = ocrdma_alloc_lkey(dev, mr, pd->id, acc, 0,
 820                                    OCRDMA_ADDR_CHECK_DISABLE);
 821         if (status) {
 822                 kfree(mr);
 823                 return ERR_PTR(status);
 824         }
 825
 826         return &mr->ibmr;
 827 }
 828
 829 static void ocrdma_free_mr_pbl_tbl(struct ocrdma_dev *dev,
 830                                    struct ocrdma_hw_mr *mr)
 831 {
 832         struct pci_dev *pdev = dev->nic_info.pdev;
 833         int i = 0;
 834
 835         if (mr->pbl_table) {
 836                 for (i = 0; i < mr->num_pbls; i++) {
 837                         if (!mr->pbl_table[i].va)
 838                                 continue;
 839                         dma_free_coherent(&pdev->dev, mr->pbl_size,
 840                                           mr->pbl_table[i].va,
 841                                           mr->pbl_table[i].pa);
 842                 }
 843                 kfree(mr->pbl_table);
 844                 mr->pbl_table = NULL;
 845         }
 846 }
 847
 848 static int ocrdma_get_pbl_info(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
 849                               u32 num_pbes)
 850 {
 851         u32 num_pbls = 0;
 852         u32 idx = 0;
 853         int status = 0;
 854         u32 pbl_size;
 855
 856         do {
 857                 pbl_size = OCRDMA_MIN_HPAGE_SIZE * (1 << idx);
 858                 if (pbl_size > MAX_OCRDMA_PBL_SIZE) {
 859                         status = -EFAULT;
 860                         break;
 861                 }
 862                 num_pbls = roundup(num_pbes, (pbl_size / sizeof(u64)));
 863                 num_pbls = num_pbls / (pbl_size / sizeof(u64));
 864                 idx++;
 865         } while (num_pbls >= dev->attr.max_num_mr_pbl);
 866
 867         mr->hwmr.num_pbes = num_pbes;
 868         mr->hwmr.num_pbls = num_pbls;
 869         mr->hwmr.pbl_size = pbl_size;
 870         return status;
 871 }
 872
 873 static int ocrdma_build_pbl_tbl(struct ocrdma_dev *dev, struct ocrdma_hw_mr *mr)
 874 {
 875         int status = 0;
 876         int i;
 877         u32 dma_len = mr->pbl_size;
 878         struct pci_dev *pdev = dev->nic_info.pdev;
 879         void *va;
 880         dma_addr_t pa;
 881
 882         mr->pbl_table = kzalloc(sizeof(struct ocrdma_pbl) *
 883                                 mr->num_pbls, GFP_KERNEL);
 884
 885         if (!mr->pbl_table)
 886                 return -ENOMEM;
 887
 888         for (i = 0; i < mr->num_pbls; i++) {
 889                 va = dma_alloc_coherent(&pdev->dev, dma_len, &pa, GFP_KERNEL);
 890                 if (!va) {
 891                         ocrdma_free_mr_pbl_tbl(dev, mr);
 892                         status = -ENOMEM;
 893                         break;
 894                 }
 895                 memset(va, 0, dma_len);
 896                 mr->pbl_table[i].va = va;
 897                 mr->pbl_table[i].pa = pa;
 898         }
 899         return status;
 900 }
 901
 902 static void build_user_pbes(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
 903                             u32 num_pbes)
 904 {
 905         struct ocrdma_pbe *pbe;
 906         struct scatterlist *sg;
 907         struct ocrdma_pbl *pbl_tbl = mr->hwmr.pbl_table;
 908         struct ib_umem *umem = mr->umem;
 909         int shift, pg_cnt, pages, pbe_cnt, entry, total_num_pbes = 0;
 910
 911         if (!mr->hwmr.num_pbes)
 912                 return;
 913
 914         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
 915         pbe_cnt = 0;
 916
 917         shift = ilog2(umem->page_size);
 918
 919         for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
 920                 pages = sg_dma_len(sg) >> shift;
 921                 for (pg_cnt = 0; pg_cnt < pages; pg_cnt++) {
 922                         /* store the page address in pbe */
 923                         pbe->pa_lo =
 924                             cpu_to_le32(sg_dma_address
 925                                         (sg) +
 926                                         (umem->page_size * pg_cnt));
 927                         pbe->pa_hi =
 928                             cpu_to_le32(upper_32_bits
 929                                         ((sg_dma_address
 930                                           (sg) +
 931                                           umem->page_size * pg_cnt)));
 932                         pbe_cnt += 1;
 933                         total_num_pbes += 1;
 934                         pbe++;
 935
 936                         /* if done building pbes, issue the mbx cmd. */
 937                         if (total_num_pbes == num_pbes)
 938                                 return;
 939
 940                         /* if the given pbl is full storing the pbes,
 941                          * move to next pbl.
 942                          */
 943                         if (pbe_cnt ==
 944                                 (mr->hwmr.pbl_size / sizeof(u64))) {
 945                                 pbl_tbl++;
 946                                 pbe = (struct ocrdma_pbe *)pbl_tbl->va;
 947                                 pbe_cnt = 0;
 948                         }
 949
 950                 }
 951         }
 952 }
 953
 954 struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
 955                                  u64 usr_addr, int acc, struct ib_udata *udata)
 956 {
 957         int status = -ENOMEM;
 958         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
 959         struct ocrdma_mr *mr;
 960         struct ocrdma_pd *pd;
 961         u32 num_pbes;
 962
 963         pd = get_ocrdma_pd(ibpd);
 964
 965         if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE))
 966                 return ERR_PTR(-EINVAL);
 967
 968         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 969         if (!mr)
 970                 return ERR_PTR(status);
 971         mr->umem = ib_umem_get(ibpd->uobject->context, start, len, acc, 0);
 972         if (IS_ERR(mr->umem)) {
 973                 status = -EFAULT;
 974                 goto umem_err;
 975         }
 976         num_pbes = ib_umem_page_count(mr->umem);
 977         status = ocrdma_get_pbl_info(dev, mr, num_pbes);
 978         if (status)
 979                 goto umem_err;
 980
 981         mr->hwmr.pbe_size = mr->umem->page_size;
 982         mr->hwmr.fbo = ib_umem_offset(mr->umem);
 983         mr->hwmr.va = usr_addr;
 984         mr->hwmr.len = len;
 985         mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
 986         mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
 987         mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
 988         mr->hwmr.local_rd = 1;
 989         mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
 990         status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
 991         if (status)
 992                 goto umem_err;
 993         build_user_pbes(dev, mr, num_pbes);
 994         status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, acc);
 995         if (status)
 996                 goto mbx_err;
 997         mr->ibmr.lkey = mr->hwmr.lkey;
 998         if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
 999                 mr->ibmr.rkey = mr->hwmr.lkey;
1000
1001         return &mr->ibmr;
1002
1003 mbx_err:
1004         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
1005 umem_err:
1006         kfree(mr);
1007         return ERR_PTR(status);
1008 }
1009
1010 int ocrdma_dereg_mr(struct ib_mr *ib_mr)
1011 {
1012         struct ocrdma_mr *mr = get_ocrdma_mr(ib_mr);
1013         struct ocrdma_dev *dev = get_ocrdma_dev(ib_mr->device);
1014
1015         (void) ocrdma_mbx_dealloc_lkey(dev, mr->hwmr.fr_mr, mr->hwmr.lkey);
1016
1017         kfree(mr->pages);
1018         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
1019
1020         /* it could be user registered memory. */
1021         if (mr->umem)
1022                 ib_umem_release(mr->umem);
1023         kfree(mr);
1024
1025         /* Don't stop cleanup, in case FW is unresponsive */
1026         if (dev->mqe_ctx.fw_error_state) {
1027                 pr_err("%s(%d) fw not responding.\n",
1028                        __func__, dev->id);
1029         }
1030         return 0;
1031 }
1032
1033 static int ocrdma_copy_cq_uresp(struct ocrdma_dev *dev, struct ocrdma_cq *cq,
1034                                 struct ib_udata *udata,
1035                                 struct ib_ucontext *ib_ctx)
1036 {
1037         int status;
1038         struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ib_ctx);
1039         struct ocrdma_create_cq_uresp uresp;
1040
1041         memset(&uresp, 0, sizeof(uresp));
1042         uresp.cq_id = cq->id;
1043         uresp.page_size = PAGE_ALIGN(cq->len);
1044         uresp.num_pages = 1;
1045         uresp.max_hw_cqe = cq->max_hw_cqe;
1046         uresp.page_addr[0] = virt_to_phys(cq->va);
1047         uresp.db_page_addr =  ocrdma_get_db_addr(dev, uctx->cntxt_pd->id);
1048         uresp.db_page_size = dev->nic_info.db_page_size;
1049         uresp.phase_change = cq->phase_change ? 1 : 0;
1050         status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
1051         if (status) {
1052                 pr_err("%s(%d) copy error cqid=0x%x.\n",
1053                        __func__, dev->id, cq->id);
1054                 goto err;
1055         }
1056         status = ocrdma_add_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
1057         if (status)
1058                 goto err;
1059         status = ocrdma_add_mmap(uctx, uresp.page_addr[0], uresp.page_size);
1060         if (status) {
1061                 ocrdma_del_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
1062                 goto err;
1063         }
1064         cq->ucontext = uctx;
1065 err:
1066         return status;
1067 }
1068
1069 struct ib_cq *ocrdma_create_cq(struct ib_device *ibdev,
1070                                const struct ib_cq_init_attr *attr,
1071                                struct ib_ucontext *ib_ctx,
1072                                struct ib_udata *udata)
1073 {
1074         int entries = attr->cqe;
1075         struct ocrdma_cq *cq;
1076         struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
1077         struct ocrdma_ucontext *uctx = NULL;
1078         u16 pd_id = 0;
1079         int status;
1080         struct ocrdma_create_cq_ureq ureq;
1081
1082         if (attr->flags)
1083                 return ERR_PTR(-EINVAL);
1084
1085         if (udata) {
1086                 if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
1087                         return ERR_PTR(-EFAULT);
1088         } else
1089                 ureq.dpp_cq = 0;
1090         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
1091         if (!cq)
1092                 return ERR_PTR(-ENOMEM);
1093
1094         spin_lock_init(&cq->cq_lock);
1095         spin_lock_init(&cq->comp_handler_lock);
1096         INIT_LIST_HEAD(&cq->sq_head);
1097         INIT_LIST_HEAD(&cq->rq_head);
1098
1099         if (ib_ctx) {
1100                 uctx = get_ocrdma_ucontext(ib_ctx);
1101                 pd_id = uctx->cntxt_pd->id;
1102         }
1103
1104         status = ocrdma_mbx_create_cq(dev, cq, entries, ureq.dpp_cq, pd_id);
1105         if (status) {
1106                 kfree(cq);
1107                 return ERR_PTR(status);
1108         }
1109         if (ib_ctx) {
1110                 status = ocrdma_copy_cq_uresp(dev, cq, udata, ib_ctx);
1111                 if (status)
1112                         goto ctx_err;
1113         }
1114         cq->phase = OCRDMA_CQE_VALID;
1115         dev->cq_tbl[cq->id] = cq;
1116         return &cq->ibcq;
1117
1118 ctx_err:
1119         ocrdma_mbx_destroy_cq(dev, cq);
1120         kfree(cq);
1121         return ERR_PTR(status);
1122 }
1123
1124 int ocrdma_resize_cq(struct ib_cq *ibcq, int new_cnt,
1125                      struct ib_udata *udata)
1126 {
1127         int status = 0;
1128         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
1129
1130         if (new_cnt < 1 || new_cnt > cq->max_hw_cqe) {
1131                 status = -EINVAL;
1132                 return status;
1133         }
1134         ibcq->cqe = new_cnt;
1135         return status;
1136 }
1137
1138 static void ocrdma_flush_cq(struct ocrdma_cq *cq)
1139 {
1140         int cqe_cnt;
1141         int valid_count = 0;
1142         unsigned long flags;
1143
1144         struct ocrdma_dev *dev = get_ocrdma_dev(cq->ibcq.device);
1145         struct ocrdma_cqe *cqe = NULL;
1146
1147         cqe = cq->va;
1148         cqe_cnt = cq->cqe_cnt;
1149
1150         /* Last irq might have scheduled a polling thread
1151          * sync-up with it before hard flushing.
1152          */
1153         spin_lock_irqsave(&cq->cq_lock, flags);
1154         while (cqe_cnt) {
1155                 if (is_cqe_valid(cq, cqe))
1156                         valid_count++;
1157                 cqe++;
1158                 cqe_cnt--;
1159         }
1160         ocrdma_ring_cq_db(dev, cq->id, false, false, valid_count);
1161         spin_unlock_irqrestore(&cq->cq_lock, flags);
1162 }
1163
1164 int ocrdma_destroy_cq(struct ib_cq *ibcq)
1165 {
1166         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
1167         struct ocrdma_eq *eq = NULL;
1168         struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
1169         int pdid = 0;
1170         u32 irq, indx;
1171
1172         dev->cq_tbl[cq->id] = NULL;
1173         indx = ocrdma_get_eq_table_index(dev, cq->eqn);
1174         BUG_ON(indx == -EINVAL);
1175
1176         eq = &dev->eq_tbl[indx];
1177         irq = ocrdma_get_irq(dev, eq);
1178         synchronize_irq(irq);
1179         ocrdma_flush_cq(cq);
1180
1181         (void)ocrdma_mbx_destroy_cq(dev, cq);
1182         if (cq->ucontext) {
1183                 pdid = cq->ucontext->cntxt_pd->id;
1184                 ocrdma_del_mmap(cq->ucontext, (u64) cq->pa,
1185                                 PAGE_ALIGN(cq->len));
1186                 ocrdma_del_mmap(cq->ucontext,
1187                                 ocrdma_get_db_addr(dev, pdid),
1188                                 dev->nic_info.db_page_size);
1189         }
1190
1191         kfree(cq);
1192         return 0;
1193 }
1194
1195 static int ocrdma_add_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
1196 {
1197         int status = -EINVAL;
1198
1199         if (qp->id < OCRDMA_MAX_QP && dev->qp_tbl[qp->id] == NULL) {
1200                 dev->qp_tbl[qp->id] = qp;
1201                 status = 0;
1202         }
1203         return status;
1204 }
1205
1206 static void ocrdma_del_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
1207 {
1208         dev->qp_tbl[qp->id] = NULL;
1209 }
1210
1211 static int ocrdma_check_qp_params(struct ib_pd *ibpd, struct ocrdma_dev *dev,
1212                                   struct ib_qp_init_attr *attrs)
1213 {
1214         if ((attrs->qp_type != IB_QPT_GSI) &&
1215             (attrs->qp_type != IB_QPT_RC) &&
1216             (attrs->qp_type != IB_QPT_UC) &&
1217             (attrs->qp_type != IB_QPT_UD)) {
1218                 pr_err("%s(%d) unsupported qp type=0x%x requested\n",
1219                        __func__, dev->id, attrs->qp_type);
1220                 return -EINVAL;
1221         }
1222         /* Skip the check for QP1 to support CM size of 128 */
1223         if ((attrs->qp_type != IB_QPT_GSI) &&
1224             (attrs->cap.max_send_wr > dev->attr.max_wqe)) {
1225                 pr_err("%s(%d) unsupported send_wr=0x%x requested\n",
1226                        __func__, dev->id, attrs->cap.max_send_wr);
1227                 pr_err("%s(%d) supported send_wr=0x%x\n",
1228                        __func__, dev->id, dev->attr.max_wqe);
1229                 return -EINVAL;
1230         }
1231         if (!attrs->srq && (attrs->cap.max_recv_wr > dev->attr.max_rqe)) {
1232                 pr_err("%s(%d) unsupported recv_wr=0x%x requested\n",
1233                        __func__, dev->id, attrs->cap.max_recv_wr);
1234                 pr_err("%s(%d) supported recv_wr=0x%x\n",
1235                        __func__, dev->id, dev->attr.max_rqe);
1236                 return -EINVAL;
1237         }
1238         if (attrs->cap.max_inline_data > dev->attr.max_inline_data) {
1239                 pr_err("%s(%d) unsupported inline data size=0x%x requested\n",
1240                        __func__, dev->id, attrs->cap.max_inline_data);
1241                 pr_err("%s(%d) supported inline data size=0x%x\n",
1242                        __func__, dev->id, dev->attr.max_inline_data);
1243                 return -EINVAL;
1244         }
1245         if (attrs->cap.max_send_sge > dev->attr.max_send_sge) {
1246                 pr_err("%s(%d) unsupported send_sge=0x%x requested\n",
1247                        __func__, dev->id, attrs->cap.max_send_sge);
1248                 pr_err("%s(%d) supported send_sge=0x%x\n",
1249                        __func__, dev->id, dev->attr.max_send_sge);
1250                 return -EINVAL;
1251         }
1252         if (attrs->cap.max_recv_sge > dev->attr.max_recv_sge) {
1253                 pr_err("%s(%d) unsupported recv_sge=0x%x requested\n",
1254                        __func__, dev->id, attrs->cap.max_recv_sge);
1255                 pr_err("%s(%d) supported recv_sge=0x%x\n",
1256                        __func__, dev->id, dev->attr.max_recv_sge);
1257                 return -EINVAL;
1258         }
1259         /* unprivileged user space cannot create special QP */
1260         if (ibpd->uobject && attrs->qp_type == IB_QPT_GSI) {
1261                 pr_err
1262                     ("%s(%d) Userspace can't create special QPs of type=0x%x\n",
1263                      __func__, dev->id, attrs->qp_type);
1264                 return -EINVAL;
1265         }
1266         /* allow creating only one GSI type of QP */
1267         if (attrs->qp_type == IB_QPT_GSI && dev->gsi_qp_created) {
1268                 pr_err("%s(%d) GSI special QPs already created.\n",
1269                        __func__, dev->id);
1270                 return -EINVAL;
1271         }
1272         /* verify consumer QPs are not trying to use GSI QP's CQ */
1273         if ((attrs->qp_type != IB_QPT_GSI) && (dev->gsi_qp_created)) {
1274                 if ((dev->gsi_sqcq == get_ocrdma_cq(attrs->send_cq)) ||
1275                         (dev->gsi_rqcq == get_ocrdma_cq(attrs->recv_cq))) {
1276                         pr_err("%s(%d) Consumer QP cannot use GSI CQs.\n",
1277                                 __func__, dev->id);
1278                         return -EINVAL;
1279                 }
1280         }
1281         return 0;
1282 }
1283
1284 static int ocrdma_copy_qp_uresp(struct ocrdma_qp *qp,
1285                                 struct ib_udata *udata, int dpp_offset,
1286                                 int dpp_credit_lmt, int srq)
1287 {
1288         int status;
1289         u64 usr_db;
1290         struct ocrdma_create_qp_uresp uresp;
1291         struct ocrdma_pd *pd = qp->pd;
1292         struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
1293
1294         memset(&uresp, 0, sizeof(uresp));
1295         usr_db = dev->nic_info.unmapped_db +
1296                         (pd->id * dev->nic_info.db_page_size);
1297         uresp.qp_id = qp->id;
1298         uresp.sq_dbid = qp->sq.dbid;
1299         uresp.num_sq_pages = 1;
1300         uresp.sq_page_size = PAGE_ALIGN(qp->sq.len);
1301         uresp.sq_page_addr[0] = virt_to_phys(qp->sq.va);
1302         uresp.num_wqe_allocated = qp->sq.max_cnt;
1303         if (!srq) {
1304                 uresp.rq_dbid = qp->rq.dbid;
1305                 uresp.num_rq_pages = 1;
1306                 uresp.rq_page_size = PAGE_ALIGN(qp->rq.len);
1307                 uresp.rq_page_addr[0] = virt_to_phys(qp->rq.va);
1308                 uresp.num_rqe_allocated = qp->rq.max_cnt;
1309         }
1310         uresp.db_page_addr = usr_db;
1311         uresp.db_page_size = dev->nic_info.db_page_size;
1312         uresp.db_sq_offset = OCRDMA_DB_GEN2_SQ_OFFSET;
1313         uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
1314         uresp.db_shift = OCRDMA_DB_RQ_SHIFT;
1315
1316         if (qp->dpp_enabled) {
1317                 uresp.dpp_credit = dpp_credit_lmt;
1318                 uresp.dpp_offset = dpp_offset;
1319         }
1320         status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
1321         if (status) {
1322                 pr_err("%s(%d) user copy error.\n", __func__, dev->id);
1323                 goto err;
1324         }
1325         status = ocrdma_add_mmap(pd->uctx, uresp.sq_page_addr[0],
1326                                  uresp.sq_page_size);
1327         if (status)
1328                 goto err;
1329
1330         if (!srq) {
1331                 status = ocrdma_add_mmap(pd->uctx, uresp.rq_page_addr[0],
1332                                          uresp.rq_page_size);
1333                 if (status)
1334                         goto rq_map_err;
1335         }
1336         return status;
1337 rq_map_err:
1338         ocrdma_del_mmap(pd->uctx, uresp.sq_page_addr[0], uresp.sq_page_size);
1339 err:
1340         return status;
1341 }
1342
1343 static void ocrdma_set_qp_db(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
1344                              struct ocrdma_pd *pd)
1345 {
1346         if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
1347                 qp->sq_db = dev->nic_info.db +
1348                         (pd->id * dev->nic_info.db_page_size) +
1349                         OCRDMA_DB_GEN2_SQ_OFFSET;
1350                 qp->rq_db = dev->nic_info.db +
1351                         (pd->id * dev->nic_info.db_page_size) +
1352                         OCRDMA_DB_GEN2_RQ_OFFSET;
1353         } else {
1354                 qp->sq_db = dev->nic_info.db +
1355                         (pd->id * dev->nic_info.db_page_size) +
1356                         OCRDMA_DB_SQ_OFFSET;
1357                 qp->rq_db = dev->nic_info.db +
1358                         (pd->id * dev->nic_info.db_page_size) +
1359                         OCRDMA_DB_RQ_OFFSET;
1360         }
1361 }
1362
1363 static int ocrdma_alloc_wr_id_tbl(struct ocrdma_qp *qp)
1364 {
1365         qp->wqe_wr_id_tbl =
1366             kzalloc(sizeof(*(qp->wqe_wr_id_tbl)) * qp->sq.max_cnt,
1367                     GFP_KERNEL);
1368         if (qp->wqe_wr_id_tbl == NULL)
1369                 return -ENOMEM;
1370         qp->rqe_wr_id_tbl =
1371             kzalloc(sizeof(u64) * qp->rq.max_cnt, GFP_KERNEL);
1372         if (qp->rqe_wr_id_tbl == NULL)
1373                 return -ENOMEM;
1374
1375         return 0;
1376 }
1377
1378 static void ocrdma_set_qp_init_params(struct ocrdma_qp *qp,
1379                                       struct ocrdma_pd *pd,
1380                                       struct ib_qp_init_attr *attrs)
1381 {
1382         qp->pd = pd;
1383         spin_lock_init(&qp->q_lock);
1384         INIT_LIST_HEAD(&qp->sq_entry);
1385         INIT_LIST_HEAD(&qp->rq_entry);
1386
1387         qp->qp_type = attrs->qp_type;
1388         qp->cap_flags = OCRDMA_QP_INB_RD | OCRDMA_QP_INB_WR;
1389         qp->max_inline_data = attrs->cap.max_inline_data;
1390         qp->sq.max_sges = attrs->cap.max_send_sge;
1391         qp->rq.max_sges = attrs->cap.max_recv_sge;
1392         qp->state = OCRDMA_QPS_RST;
1393         qp->signaled = (attrs->sq_sig_type == IB_SIGNAL_ALL_WR) ? true : false;
1394 }
1395
1396 static void ocrdma_store_gsi_qp_cq(struct ocrdma_dev *dev,
1397                                    struct ib_qp_init_attr *attrs)
1398 {
1399         if (attrs->qp_type == IB_QPT_GSI) {
1400                 dev->gsi_qp_created = 1;
1401                 dev->gsi_sqcq = get_ocrdma_cq(attrs->send_cq);
1402                 dev->gsi_rqcq = get_ocrdma_cq(attrs->recv_cq);
1403         }
1404 }
1405
1406 struct ib_qp *ocrdma_create_qp(struct ib_pd *ibpd,
1407                                struct ib_qp_init_attr *attrs,
1408                                struct ib_udata *udata)
1409 {
1410         int status;
1411         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
1412         struct ocrdma_qp *qp;
1413         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
1414         struct ocrdma_create_qp_ureq ureq;
1415         u16 dpp_credit_lmt, dpp_offset;
1416
1417         status = ocrdma_check_qp_params(ibpd, dev, attrs);
1418         if (status)
1419                 goto gen_err;
1420
1421         memset(&ureq, 0, sizeof(ureq));
1422         if (udata) {
1423                 if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
1424                         return ERR_PTR(-EFAULT);
1425         }
1426         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
1427         if (!qp) {
1428                 status = -ENOMEM;
1429                 goto gen_err;
1430         }
1431         ocrdma_set_qp_init_params(qp, pd, attrs);
1432         if (udata == NULL)
1433                 qp->cap_flags |= (OCRDMA_QP_MW_BIND | OCRDMA_QP_LKEY0 |
1434                                         OCRDMA_QP_FAST_REG);
1435
1436         mutex_lock(&dev->dev_lock);
1437         status = ocrdma_mbx_create_qp(qp, attrs, ureq.enable_dpp_cq,
1438                                         ureq.dpp_cq_id,
1439                                         &dpp_offset, &dpp_credit_lmt);
1440         if (status)
1441                 goto mbx_err;
1442
1443         /* user space QP's wr_id table are managed in library */
1444         if (udata == NULL) {
1445                 status = ocrdma_alloc_wr_id_tbl(qp);
1446                 if (status)
1447                         goto map_err;
1448         }
1449
1450         status = ocrdma_add_qpn_map(dev, qp);
1451         if (status)
1452                 goto map_err;
1453         ocrdma_set_qp_db(dev, qp, pd);
1454         if (udata) {
1455                 status = ocrdma_copy_qp_uresp(qp, udata, dpp_offset,
1456                                               dpp_credit_lmt,
1457                                               (attrs->srq != NULL));
1458                 if (status)
1459                         goto cpy_err;
1460         }
1461         ocrdma_store_gsi_qp_cq(dev, attrs);
1462         qp->ibqp.qp_num = qp->id;
1463         mutex_unlock(&dev->dev_lock);
1464         return &qp->ibqp;
1465
1466 cpy_err:
1467         ocrdma_del_qpn_map(dev, qp);
1468 map_err:
1469         ocrdma_mbx_destroy_qp(dev, qp);
1470 mbx_err:
1471         mutex_unlock(&dev->dev_lock);
1472         kfree(qp->wqe_wr_id_tbl);
1473         kfree(qp->rqe_wr_id_tbl);
1474         kfree(qp);
1475         pr_err("%s(%d) error=%d\n", __func__, dev->id, status);
1476 gen_err:
1477         return ERR_PTR(status);
1478 }
1479
1480 int _ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1481                       int attr_mask)
1482 {
1483         int status = 0;
1484         struct ocrdma_qp *qp;
1485         struct ocrdma_dev *dev;
1486         enum ib_qp_state old_qps;
1487
1488         qp = get_ocrdma_qp(ibqp);
1489         dev = get_ocrdma_dev(ibqp->device);
1490         if (attr_mask & IB_QP_STATE)
1491                 status = ocrdma_qp_state_change(qp, attr->qp_state, &old_qps);
1492         /* if new and previous states are same hw doesn't need to
1493          * know about it.
1494          */
1495         if (status < 0)
1496                 return status;
1497         return ocrdma_mbx_modify_qp(dev, qp, attr, attr_mask);
1498 }
1499
1500 int ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1501                      int attr_mask, struct ib_udata *udata)
1502 {
1503         unsigned long flags;
1504         int status = -EINVAL;
1505         struct ocrdma_qp *qp;
1506         struct ocrdma_dev *dev;
1507         enum ib_qp_state old_qps, new_qps;
1508
1509         qp = get_ocrdma_qp(ibqp);
1510         dev = get_ocrdma_dev(ibqp->device);
1511
1512         /* syncronize with multiple context trying to change, retrive qps */
1513         mutex_lock(&dev->dev_lock);
1514         /* syncronize with wqe, rqe posting and cqe processing contexts */
1515         spin_lock_irqsave(&qp->q_lock, flags);
1516         old_qps = get_ibqp_state(qp->state);
1517         if (attr_mask & IB_QP_STATE)
1518                 new_qps = attr->qp_state;
1519         else
1520                 new_qps = old_qps;
1521         spin_unlock_irqrestore(&qp->q_lock, flags);
1522
1523         if (!ib_modify_qp_is_ok(old_qps, new_qps, ibqp->qp_type, attr_mask,
1524                                 IB_LINK_LAYER_ETHERNET)) {
1525                 pr_err("%s(%d) invalid attribute mask=0x%x specified for\n"
1526                        "qpn=0x%x of type=0x%x old_qps=0x%x, new_qps=0x%x\n",
1527                        __func__, dev->id, attr_mask, qp->id, ibqp->qp_type,
1528                        old_qps, new_qps);
1529                 goto param_err;
1530         }
1531
1532         status = _ocrdma_modify_qp(ibqp, attr, attr_mask);
1533         if (status > 0)
1534                 status = 0;
1535 param_err:
1536         mutex_unlock(&dev->dev_lock);
1537         return status;
1538 }
1539
1540 static enum ib_mtu ocrdma_mtu_int_to_enum(u16 mtu)
1541 {
1542         switch (mtu) {
1543         case 256:
1544                 return IB_MTU_256;
1545         case 512:
1546                 return IB_MTU_512;
1547         case 1024:
1548                 return IB_MTU_1024;
1549         case 2048:
1550                 return IB_MTU_2048;
1551         case 4096:
1552                 return IB_MTU_4096;
1553         default:
1554                 return IB_MTU_1024;
1555         }
1556 }
1557
1558 static int ocrdma_to_ib_qp_acc_flags(int qp_cap_flags)
1559 {
1560         int ib_qp_acc_flags = 0;
1561
1562         if (qp_cap_flags & OCRDMA_QP_INB_WR)
1563                 ib_qp_acc_flags |= IB_ACCESS_REMOTE_WRITE;
1564         if (qp_cap_flags & OCRDMA_QP_INB_RD)
1565                 ib_qp_acc_flags |= IB_ACCESS_LOCAL_WRITE;
1566         return ib_qp_acc_flags;
1567 }
1568
1569 int ocrdma_query_qp(struct ib_qp *ibqp,
1570                     struct ib_qp_attr *qp_attr,
1571                     int attr_mask, struct ib_qp_init_attr *qp_init_attr)
1572 {
1573         int status;
1574         u32 qp_state;
1575         struct ocrdma_qp_params params;
1576         struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
1577         struct ocrdma_dev *dev = get_ocrdma_dev(ibqp->device);
1578
1579         memset(&params, 0, sizeof(params));
1580         mutex_lock(&dev->dev_lock);
1581         status = ocrdma_mbx_query_qp(dev, qp, &params);
1582         mutex_unlock(&dev->dev_lock);
1583         if (status)
1584                 goto mbx_err;
1585         if (qp->qp_type == IB_QPT_UD)
1586                 qp_attr->qkey = params.qkey;
1587         qp_attr->path_mtu =
1588                 ocrdma_mtu_int_to_enum(params.path_mtu_pkey_indx &
1589                                 OCRDMA_QP_PARAMS_PATH_MTU_MASK) >>
1590                                 OCRDMA_QP_PARAMS_PATH_MTU_SHIFT;
1591         qp_attr->path_mig_state = IB_MIG_MIGRATED;
1592         qp_attr->rq_psn = params.hop_lmt_rq_psn & OCRDMA_QP_PARAMS_RQ_PSN_MASK;
1593         qp_attr->sq_psn = params.tclass_sq_psn & OCRDMA_QP_PARAMS_SQ_PSN_MASK;
1594         qp_attr->dest_qp_num =
1595             params.ack_to_rnr_rtc_dest_qpn & OCRDMA_QP_PARAMS_DEST_QPN_MASK;
1596
1597         qp_attr->qp_access_flags = ocrdma_to_ib_qp_acc_flags(qp->cap_flags);
1598         qp_attr->cap.max_send_wr = qp->sq.max_cnt - 1;
1599         qp_attr->cap.max_recv_wr = qp->rq.max_cnt - 1;
1600         qp_attr->cap.max_send_sge = qp->sq.max_sges;
1601         qp_attr->cap.max_recv_sge = qp->rq.max_sges;
1602         qp_attr->cap.max_inline_data = qp->max_inline_data;
1603         qp_init_attr->cap = qp_attr->cap;
1604         memcpy(&qp_attr->ah_attr.grh.dgid, &params.dgid[0],
1605                sizeof(params.dgid));
1606         qp_attr->ah_attr.grh.flow_label = params.rnt_rc_sl_fl &
1607             OCRDMA_QP_PARAMS_FLOW_LABEL_MASK;
1608         qp_attr->ah_attr.grh.sgid_index = qp->sgid_idx;
1609         qp_attr->ah_attr.grh.hop_limit = (params.hop_lmt_rq_psn &
1610                                           OCRDMA_QP_PARAMS_HOP_LMT_MASK) >>
1611                                                 OCRDMA_QP_PARAMS_HOP_LMT_SHIFT;
1612         qp_attr->ah_attr.grh.traffic_class = (params.tclass_sq_psn &
1613                                               OCRDMA_QP_PARAMS_TCLASS_MASK) >>
1614                                                 OCRDMA_QP_PARAMS_TCLASS_SHIFT;
1615
1616         qp_attr->ah_attr.ah_flags = IB_AH_GRH;
1617         qp_attr->ah_attr.port_num = 1;
1618         qp_attr->ah_attr.sl = (params.rnt_rc_sl_fl &
1619                                OCRDMA_QP_PARAMS_SL_MASK) >>
1620                                 OCRDMA_QP_PARAMS_SL_SHIFT;
1621         qp_attr->timeout = (params.ack_to_rnr_rtc_dest_qpn &
1622                             OCRDMA_QP_PARAMS_ACK_TIMEOUT_MASK) >>
1623                                 OCRDMA_QP_PARAMS_ACK_TIMEOUT_SHIFT;
1624         qp_attr->rnr_retry = (params.ack_to_rnr_rtc_dest_qpn &
1625                               OCRDMA_QP_PARAMS_RNR_RETRY_CNT_MASK) >>
1626                                 OCRDMA_QP_PARAMS_RNR_RETRY_CNT_SHIFT;
1627         qp_attr->retry_cnt =
1628             (params.rnt_rc_sl_fl & OCRDMA_QP_PARAMS_RETRY_CNT_MASK) >>
1629                 OCRDMA_QP_PARAMS_RETRY_CNT_SHIFT;
1630         qp_attr->min_rnr_timer = 0;
1631         qp_attr->pkey_index = 0;
1632         qp_attr->port_num = 1;
1633         qp_attr->ah_attr.src_path_bits = 0;
1634         qp_attr->ah_attr.static_rate = 0;
1635         qp_attr->alt_pkey_index = 0;
1636         qp_attr->alt_port_num = 0;
1637         qp_attr->alt_timeout = 0;
1638         memset(&qp_attr->alt_ah_attr, 0, sizeof(qp_attr->alt_ah_attr));
1639         qp_state = (params.max_sge_recv_flags & OCRDMA_QP_PARAMS_STATE_MASK) >>
1640                     OCRDMA_QP_PARAMS_STATE_SHIFT;
1641         qp_attr->qp_state = get_ibqp_state(qp_state);
1642         qp_attr->cur_qp_state = qp_attr->qp_state;
1643         qp_attr->sq_draining = (qp_state == OCRDMA_QPS_SQ_DRAINING) ? 1 : 0;
1644         qp_attr->max_dest_rd_atomic =
1645             params.max_ord_ird >> OCRDMA_QP_PARAMS_MAX_ORD_SHIFT;
1646         qp_attr->max_rd_atomic =
1647             params.max_ord_ird & OCRDMA_QP_PARAMS_MAX_IRD_MASK;
1648         qp_attr->en_sqd_async_notify = (params.max_sge_recv_flags &
1649                                 OCRDMA_QP_PARAMS_FLAGS_SQD_ASYNC) ? 1 : 0;
1650         /* Sync driver QP state with FW */
1651         ocrdma_qp_state_change(qp, qp_attr->qp_state, NULL);
1652 mbx_err:
1653         return status;
1654 }
1655
1656 static void ocrdma_srq_toggle_bit(struct ocrdma_srq *srq, unsigned int idx)
1657 {
1658         unsigned int i = idx / 32;
1659         u32 mask = (1U << (idx % 32));
1660
1661         srq->idx_bit_fields[i] ^= mask;
1662 }
1663
1664 static int ocrdma_hwq_free_cnt(struct ocrdma_qp_hwq_info *q)
1665 {
1666         return ((q->max_wqe_idx - q->head) + q->tail) % q->max_cnt;
1667 }
1668
1669 static int is_hw_sq_empty(struct ocrdma_qp *qp)
1670 {
1671         return (qp->sq.tail == qp->sq.head);
1672 }
1673
1674 static int is_hw_rq_empty(struct ocrdma_qp *qp)
1675 {
1676         return (qp->rq.tail == qp->rq.head);
1677 }
1678
1679 static void *ocrdma_hwq_head(struct ocrdma_qp_hwq_info *q)
1680 {
1681         return q->va + (q->head * q->entry_size);
1682 }
1683
1684 static void *ocrdma_hwq_head_from_idx(struct ocrdma_qp_hwq_info *q,
1685                                       u32 idx)
1686 {
1687         return q->va + (idx * q->entry_size);
1688 }
1689
1690 static void ocrdma_hwq_inc_head(struct ocrdma_qp_hwq_info *q)
1691 {
1692         q->head = (q->head + 1) & q->max_wqe_idx;
1693 }
1694
1695 static void ocrdma_hwq_inc_tail(struct ocrdma_qp_hwq_info *q)
1696 {
1697         q->tail = (q->tail + 1) & q->max_wqe_idx;
1698 }
1699
1700 /* discard the cqe for a given QP */
1701 static void ocrdma_discard_cqes(struct ocrdma_qp *qp, struct ocrdma_cq *cq)
1702 {
1703         unsigned long cq_flags;
1704         unsigned long flags;
1705         int discard_cnt = 0;
1706         u32 cur_getp, stop_getp;
1707         struct ocrdma_cqe *cqe;
1708         u32 qpn = 0, wqe_idx = 0;
1709
1710         spin_lock_irqsave(&cq->cq_lock, cq_flags);
1711
1712         /* traverse through the CQEs in the hw CQ,
1713          * find the matching CQE for a given qp,
1714          * mark the matching one discarded by clearing qpn.
1715          * ring the doorbell in the poll_cq() as
1716          * we don't complete out of order cqe.
1717          */
1718
1719         cur_getp = cq->getp;
1720         /* find upto when do we reap the cq. */
1721         stop_getp = cur_getp;
1722         do {
1723                 if (is_hw_sq_empty(qp) && (!qp->srq && is_hw_rq_empty(qp)))
1724                         break;
1725
1726                 cqe = cq->va + cur_getp;
1727                 /* if (a) done reaping whole hw cq, or
1728                  *    (b) qp_xq becomes empty.
1729                  * then exit
1730                  */
1731                 qpn = cqe->cmn.qpn & OCRDMA_CQE_QPN_MASK;
1732                 /* if previously discarded cqe found, skip that too. */
1733                 /* check for matching qp */
1734                 if (qpn == 0 || qpn != qp->id)
1735                         goto skip_cqe;
1736
1737                 if (is_cqe_for_sq(cqe)) {
1738                         ocrdma_hwq_inc_tail(&qp->sq);
1739                 } else {
1740                         if (qp->srq) {
1741                                 wqe_idx = (le32_to_cpu(cqe->rq.buftag_qpn) >>
1742                                         OCRDMA_CQE_BUFTAG_SHIFT) &
1743                                         qp->srq->rq.max_wqe_idx;
1744                                 BUG_ON(wqe_idx < 1);
1745                                 spin_lock_irqsave(&qp->srq->q_lock, flags);
1746                                 ocrdma_hwq_inc_tail(&qp->srq->rq);
1747                                 ocrdma_srq_toggle_bit(qp->srq, wqe_idx - 1);
1748                                 spin_unlock_irqrestore(&qp->srq->q_lock, flags);
1749
1750                         } else {
1751                                 ocrdma_hwq_inc_tail(&qp->rq);
1752                         }
1753                 }
1754                 /* mark cqe discarded so that it is not picked up later
1755                  * in the poll_cq().
1756                  */
1757                 discard_cnt += 1;
1758                 cqe->cmn.qpn = 0;
1759 skip_cqe:
1760                 cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
1761         } while (cur_getp != stop_getp);
1762         spin_unlock_irqrestore(&cq->cq_lock, cq_flags);
1763 }
1764
1765 void ocrdma_del_flush_qp(struct ocrdma_qp *qp)
1766 {
1767         int found = false;
1768         unsigned long flags;
1769         struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);
1770         /* sync with any active CQ poll */
1771
1772         spin_lock_irqsave(&dev->flush_q_lock, flags);
1773         found = ocrdma_is_qp_in_sq_flushlist(qp->sq_cq, qp);
1774         if (found)
1775                 list_del(&qp->sq_entry);
1776         if (!qp->srq) {
1777                 found = ocrdma_is_qp_in_rq_flushlist(qp->rq_cq, qp);
1778                 if (found)
1779                         list_del(&qp->rq_entry);
1780         }
1781         spin_unlock_irqrestore(&dev->flush_q_lock, flags);
1782 }
1783
1784 int ocrdma_destroy_qp(struct ib_qp *ibqp)
1785 {
1786         struct ocrdma_pd *pd;
1787         struct ocrdma_qp *qp;
1788         struct ocrdma_dev *dev;
1789         struct ib_qp_attr attrs;
1790         int attr_mask;
1791         unsigned long flags;
1792
1793         qp = get_ocrdma_qp(ibqp);
1794         dev = get_ocrdma_dev(ibqp->device);
1795
1796         pd = qp->pd;
1797
1798         /* change the QP state to ERROR */
1799         if (qp->state != OCRDMA_QPS_RST) {
1800                 attrs.qp_state = IB_QPS_ERR;
1801                 attr_mask = IB_QP_STATE;
1802                 _ocrdma_modify_qp(ibqp, &attrs, attr_mask);
1803         }
1804         /* ensure that CQEs for newly created QP (whose id may be same with
1805          * one which just getting destroyed are same), dont get
1806          * discarded until the old CQEs are discarded.
1807          */
1808         mutex_lock(&dev->dev_lock);
1809         (void) ocrdma_mbx_destroy_qp(dev, qp);
1810
1811         /*
1812          * acquire CQ lock while destroy is in progress, in order to
1813          * protect against proessing in-flight CQEs for this QP.
1814          */
1815         spin_lock_irqsave(&qp->sq_cq->cq_lock, flags);
1816         if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
1817                 spin_lock(&qp->rq_cq->cq_lock);
1818
1819         ocrdma_del_qpn_map(dev, qp);
1820
1821         if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
1822                 spin_unlock(&qp->rq_cq->cq_lock);
1823         spin_unlock_irqrestore(&qp->sq_cq->cq_lock, flags);
1824
1825         if (!pd->uctx) {
1826                 ocrdma_discard_cqes(qp, qp->sq_cq);
1827                 ocrdma_discard_cqes(qp, qp->rq_cq);
1828         }
1829         mutex_unlock(&dev->dev_lock);
1830
1831         if (pd->uctx) {
1832                 ocrdma_del_mmap(pd->uctx, (u64) qp->sq.pa,
1833                                 PAGE_ALIGN(qp->sq.len));
1834                 if (!qp->srq)
1835                         ocrdma_del_mmap(pd->uctx, (u64) qp->rq.pa,
1836                                         PAGE_ALIGN(qp->rq.len));
1837         }
1838
1839         ocrdma_del_flush_qp(qp);
1840
1841         kfree(qp->wqe_wr_id_tbl);
1842         kfree(qp->rqe_wr_id_tbl);
1843         kfree(qp);
1844         return 0;
1845 }
1846
1847 static int ocrdma_copy_srq_uresp(struct ocrdma_dev *dev, struct ocrdma_srq *srq,
1848                                 struct ib_udata *udata)
1849 {
1850         int status;
1851         struct ocrdma_create_srq_uresp uresp;
1852
1853         memset(&uresp, 0, sizeof(uresp));
1854         uresp.rq_dbid = srq->rq.dbid;
1855         uresp.num_rq_pages = 1;
1856         uresp.rq_page_addr[0] = virt_to_phys(srq->rq.va);
1857         uresp.rq_page_size = srq->rq.len;
1858         uresp.db_page_addr = dev->nic_info.unmapped_db +
1859             (srq->pd->id * dev->nic_info.db_page_size);
1860         uresp.db_page_size = dev->nic_info.db_page_size;
1861         uresp.num_rqe_allocated = srq->rq.max_cnt;
1862         if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
1863                 uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
1864                 uresp.db_shift = 24;
1865         } else {
1866                 uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET;
1867                 uresp.db_shift = 16;
1868         }
1869
1870         status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
1871         if (status)
1872                 return status;
1873         status = ocrdma_add_mmap(srq->pd->uctx, uresp.rq_page_addr[0],
1874                                  uresp.rq_page_size);
1875         if (status)
1876                 return status;
1877         return status;
1878 }
1879
1880 struct ib_srq *ocrdma_create_srq(struct ib_pd *ibpd,
1881                                  struct ib_srq_init_attr *init_attr,
1882                                  struct ib_udata *udata)
1883 {
1884         int status = -ENOMEM;
1885         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
1886         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
1887         struct ocrdma_srq *srq;
1888
1889         if (init_attr->attr.max_sge > dev->attr.max_recv_sge)
1890                 return ERR_PTR(-EINVAL);
1891         if (init_attr->attr.max_wr > dev->attr.max_rqe)
1892                 return ERR_PTR(-EINVAL);
1893
1894         srq = kzalloc(sizeof(*srq), GFP_KERNEL);
1895         if (!srq)
1896                 return ERR_PTR(status);
1897
1898         spin_lock_init(&srq->q_lock);
1899         srq->pd = pd;
1900         srq->db = dev->nic_info.db + (pd->id * dev->nic_info.db_page_size);
1901         status = ocrdma_mbx_create_srq(dev, srq, init_attr, pd);
1902         if (status)
1903                 goto err;
1904
1905         if (udata == NULL) {
1906                 srq->rqe_wr_id_tbl = kzalloc(sizeof(u64) * srq->rq.max_cnt,
1907                             GFP_KERNEL);
1908                 if (srq->rqe_wr_id_tbl == NULL)
1909                         goto arm_err;
1910
1911                 srq->bit_fields_len = (srq->rq.max_cnt / 32) +
1912                     (srq->rq.max_cnt % 32 ? 1 : 0);
1913                 srq->idx_bit_fields =
1914                     kmalloc(srq->bit_fields_len * sizeof(u32), GFP_KERNEL);
1915                 if (srq->idx_bit_fields == NULL)
1916                         goto arm_err;
1917                 memset(srq->idx_bit_fields, 0xff,
1918                        srq->bit_fields_len * sizeof(u32));
1919         }
1920
1921         if (init_attr->attr.srq_limit) {
1922                 status = ocrdma_mbx_modify_srq(srq, &init_attr->attr);
1923                 if (status)
1924                         goto arm_err;
1925         }
1926
1927         if (udata) {
1928                 status = ocrdma_copy_srq_uresp(dev, srq, udata);
1929                 if (status)
1930                         goto arm_err;
1931         }
1932
1933         return &srq->ibsrq;
1934
1935 arm_err:
1936         ocrdma_mbx_destroy_srq(dev, srq);
1937 err:
1938         kfree(srq->rqe_wr_id_tbl);
1939         kfree(srq->idx_bit_fields);
1940         kfree(srq);
1941         return ERR_PTR(status);
1942 }
1943
1944 int ocrdma_modify_srq(struct ib_srq *ibsrq,
1945                       struct ib_srq_attr *srq_attr,
1946                       enum ib_srq_attr_mask srq_attr_mask,
1947                       struct ib_udata *udata)
1948 {
1949         int status;
1950         struct ocrdma_srq *srq;
1951
1952         srq = get_ocrdma_srq(ibsrq);
1953         if (srq_attr_mask & IB_SRQ_MAX_WR)
1954                 status = -EINVAL;
1955         else
1956                 status = ocrdma_mbx_modify_srq(srq, srq_attr);
1957         return status;
1958 }
1959
1960 int ocrdma_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
1961 {
1962         int status;
1963         struct ocrdma_srq *srq;
1964
1965         srq = get_ocrdma_srq(ibsrq);
1966         status = ocrdma_mbx_query_srq(srq, srq_attr);
1967         return status;
1968 }
1969
1970 int ocrdma_destroy_srq(struct ib_srq *ibsrq)
1971 {
1972         int status;
1973         struct ocrdma_srq *srq;
1974         struct ocrdma_dev *dev = get_ocrdma_dev(ibsrq->device);
1975
1976         srq = get_ocrdma_srq(ibsrq);
1977
1978         status = ocrdma_mbx_destroy_srq(dev, srq);
1979
1980         if (srq->pd->uctx)
1981                 ocrdma_del_mmap(srq->pd->uctx, (u64) srq->rq.pa,
1982                                 PAGE_ALIGN(srq->rq.len));
1983
1984         kfree(srq->idx_bit_fields);
1985         kfree(srq->rqe_wr_id_tbl);
1986         kfree(srq);
1987         return status;
1988 }
1989
1990 /* unprivileged verbs and their support functions. */
1991 static void ocrdma_build_ud_hdr(struct ocrdma_qp *qp,
1992                                 struct ocrdma_hdr_wqe *hdr,
1993                                 struct ib_send_wr *wr)
1994 {
1995         struct ocrdma_ewqe_ud_hdr *ud_hdr =
1996                 (struct ocrdma_ewqe_ud_hdr *)(hdr + 1);
1997         struct ocrdma_ah *ah = get_ocrdma_ah(ud_wr(wr)->ah);
1998
1999         ud_hdr->rsvd_dest_qpn = ud_wr(wr)->remote_qpn;
2000         if (qp->qp_type == IB_QPT_GSI)
2001                 ud_hdr->qkey = qp->qkey;
2002         else
2003                 ud_hdr->qkey = ud_wr(wr)->remote_qkey;
2004         ud_hdr->rsvd_ahid = ah->id;
2005         ud_hdr->hdr_type = ah->hdr_type;
2006         if (ah->av->valid & OCRDMA_AV_VLAN_VALID)
2007                 hdr->cw |= (OCRDMA_FLAG_AH_VLAN_PR << OCRDMA_WQE_FLAGS_SHIFT);
2008 }
2009
2010 static void ocrdma_build_sges(struct ocrdma_hdr_wqe *hdr,
2011                               struct ocrdma_sge *sge, int num_sge,
2012                               struct ib_sge *sg_list)
2013 {
2014         int i;
2015
2016         for (i = 0; i < num_sge; i++) {
2017                 sge[i].lrkey = sg_list[i].lkey;
2018                 sge[i].addr_lo = sg_list[i].addr;
2019                 sge[i].addr_hi = upper_32_bits(sg_list[i].addr);
2020                 sge[i].len = sg_list[i].length;
2021                 hdr->total_len += sg_list[i].length;
2022         }
2023         if (num_sge == 0)
2024                 memset(sge, 0, sizeof(*sge));
2025 }
2026
2027 static inline uint32_t ocrdma_sglist_len(struct ib_sge *sg_list, int num_sge)
2028 {
2029         uint32_t total_len = 0, i;
2030
2031         for (i = 0; i < num_sge; i++)
2032                 total_len += sg_list[i].length;
2033         return total_len;
2034 }
2035
2036
2037 static int ocrdma_build_inline_sges(struct ocrdma_qp *qp,
2038                                     struct ocrdma_hdr_wqe *hdr,
2039                                     struct ocrdma_sge *sge,
2040                                     struct ib_send_wr *wr, u32 wqe_size)
2041 {
2042         int i;
2043         char *dpp_addr;
2044
2045         if (wr->send_flags & IB_SEND_INLINE && qp->qp_type != IB_QPT_UD) {
2046                 hdr->total_len = ocrdma_sglist_len(wr->sg_list, wr->num_sge);
2047                 if (unlikely(hdr->total_len > qp->max_inline_data)) {
2048                         pr_err("%s() supported_len=0x%x,\n"
2049                                " unsupported len req=0x%x\n", __func__,
2050                                 qp->max_inline_data, hdr->total_len);
2051                         return -EINVAL;
2052                 }
2053                 dpp_addr = (char *)sge;
2054                 for (i = 0; i < wr->num_sge; i++) {
2055                         memcpy(dpp_addr,
2056                                (void *)(unsigned long)wr->sg_list[i].addr,
2057                                wr->sg_list[i].length);
2058                         dpp_addr += wr->sg_list[i].length;
2059                 }
2060
2061                 wqe_size += roundup(hdr->total_len, OCRDMA_WQE_ALIGN_BYTES);
2062                 if (0 == hdr->total_len)
2063                         wqe_size += sizeof(struct ocrdma_sge);
2064                 hdr->cw |= (OCRDMA_TYPE_INLINE << OCRDMA_WQE_TYPE_SHIFT);
2065         } else {
2066                 ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
2067                 if (wr->num_sge)
2068                         wqe_size += (wr->num_sge * sizeof(struct ocrdma_sge));
2069                 else
2070                         wqe_size += sizeof(struct ocrdma_sge);
2071                 hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
2072         }
2073         hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
2074         return 0;
2075 }
2076
2077 static int ocrdma_build_send(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
2078                              struct ib_send_wr *wr)
2079 {
2080         int status;
2081         struct ocrdma_sge *sge;
2082         u32 wqe_size = sizeof(*hdr);
2083
2084         if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
2085                 ocrdma_build_ud_hdr(qp, hdr, wr);
2086                 sge = (struct ocrdma_sge *)(hdr + 2);
2087                 wqe_size += sizeof(struct ocrdma_ewqe_ud_hdr);
2088         } else {
2089                 sge = (struct ocrdma_sge *)(hdr + 1);
2090         }
2091
2092         status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
2093         return status;
2094 }
2095
2096 static int ocrdma_build_write(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
2097                               struct ib_send_wr *wr)
2098 {
2099         int status;
2100         struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
2101         struct ocrdma_sge *sge = ext_rw + 1;
2102         u32 wqe_size = sizeof(*hdr) + sizeof(*ext_rw);
2103
2104         status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
2105         if (status)
2106                 return status;
2107         ext_rw->addr_lo = rdma_wr(wr)->remote_addr;
2108         ext_rw->addr_hi = upper_32_bits(rdma_wr(wr)->remote_addr);
2109         ext_rw->lrkey = rdma_wr(wr)->rkey;
2110         ext_rw->len = hdr->total_len;
2111         return 0;
2112 }
2113
2114 static void ocrdma_build_read(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
2115                               struct ib_send_wr *wr)
2116 {
2117         struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
2118         struct ocrdma_sge *sge = ext_rw + 1;
2119         u32 wqe_size = ((wr->num_sge + 1) * sizeof(struct ocrdma_sge)) +
2120             sizeof(struct ocrdma_hdr_wqe);
2121
2122         ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
2123         hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
2124         hdr->cw |= (OCRDMA_READ << OCRDMA_WQE_OPCODE_SHIFT);
2125         hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
2126
2127         ext_rw->addr_lo = rdma_wr(wr)->remote_addr;
2128         ext_rw->addr_hi = upper_32_bits(rdma_wr(wr)->remote_addr);
2129         ext_rw->lrkey = rdma_wr(wr)->rkey;
2130         ext_rw->len = hdr->total_len;
2131 }
2132
2133 static int get_encoded_page_size(int pg_sz)
2134 {
2135         /* Max size is 256M 4096 << 16 */
2136         int i = 0;
2137         for (; i < 17; i++)
2138                 if (pg_sz == (4096 << i))
2139                         break;
2140         return i;
2141 }
2142
2143 static int ocrdma_build_reg(struct ocrdma_qp *qp,
2144                             struct ocrdma_hdr_wqe *hdr,
2145                             struct ib_reg_wr *wr)
2146 {
2147         u64 fbo;
2148         struct ocrdma_ewqe_fr *fast_reg = (struct ocrdma_ewqe_fr *)(hdr + 1);
2149         struct ocrdma_mr *mr = get_ocrdma_mr(wr->mr);
2150         struct ocrdma_pbl *pbl_tbl = mr->hwmr.pbl_table;
2151         struct ocrdma_pbe *pbe;
2152         u32 wqe_size = sizeof(*fast_reg) + sizeof(*hdr);
2153         int num_pbes = 0, i;
2154
2155         wqe_size = roundup(wqe_size, OCRDMA_WQE_ALIGN_BYTES);
2156
2157         hdr->cw |= (OCRDMA_FR_MR << OCRDMA_WQE_OPCODE_SHIFT);
2158         hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
2159
2160         if (wr->access & IB_ACCESS_LOCAL_WRITE)
2161                 hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_LOCAL_WR;
2162         if (wr->access & IB_ACCESS_REMOTE_WRITE)
2163                 hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_WR;
2164         if (wr->access & IB_ACCESS_REMOTE_READ)
2165                 hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_RD;
2166         hdr->lkey = wr->key;
2167         hdr->total_len = mr->ibmr.length;
2168
2169         fbo = mr->ibmr.iova - mr->pages[0];
2170
2171         fast_reg->va_hi = upper_32_bits(mr->ibmr.iova);
2172         fast_reg->va_lo = (u32) (mr->ibmr.iova & 0xffffffff);
2173         fast_reg->fbo_hi = upper_32_bits(fbo);
2174         fast_reg->fbo_lo = (u32) fbo & 0xffffffff;
2175         fast_reg->num_sges = mr->npages;
2176         fast_reg->size_sge = get_encoded_page_size(mr->ibmr.page_size);
2177
2178         pbe = pbl_tbl->va;
2179         for (i = 0; i < mr->npages; i++) {
2180                 u64 buf_addr = mr->pages[i];
2181
2182                 pbe->pa_lo = cpu_to_le32((u32) (buf_addr & PAGE_MASK));
2183                 pbe->pa_hi = cpu_to_le32((u32) upper_32_bits(buf_addr));
2184                 num_pbes += 1;
2185                 pbe++;
2186
2187                 /* if the pbl is full storing the pbes,
2188                  * move to next pbl.
2189                 */
2190                 if (num_pbes == (mr->hwmr.pbl_size/sizeof(u64))) {
2191                         pbl_tbl++;
2192                         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
2193                 }
2194         }
2195
2196         return 0;
2197 }
2198
2199 static void ocrdma_ring_sq_db(struct ocrdma_qp *qp)
2200 {
2201         u32 val = qp->sq.dbid | (1 << OCRDMA_DB_SQ_SHIFT);
2202
2203         iowrite32(val, qp->sq_db);
2204 }
2205
2206 int ocrdma_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2207                      struct ib_send_wr **bad_wr)
2208 {
2209         int status = 0;
2210         struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
2211         struct ocrdma_hdr_wqe *hdr;
2212         unsigned long flags;
2213
2214         spin_lock_irqsave(&qp->q_lock, flags);
2215         if (qp->state != OCRDMA_QPS_RTS && qp->state != OCRDMA_QPS_SQD) {
2216                 spin_unlock_irqrestore(&qp->q_lock, flags);
2217                 *bad_wr = wr;
2218                 return -EINVAL;
2219         }
2220
2221         while (wr) {
2222                 if (qp->qp_type == IB_QPT_UD &&
2223                     (wr->opcode != IB_WR_SEND &&
2224                      wr->opcode != IB_WR_SEND_WITH_IMM)) {
2225                         *bad_wr = wr;
2226                         status = -EINVAL;
2227                         break;
2228                 }
2229                 if (ocrdma_hwq_free_cnt(&qp->sq) == 0 ||
2230                     wr->num_sge > qp->sq.max_sges) {
2231                         *bad_wr = wr;
2232                         status = -ENOMEM;
2233                         break;
2234                 }
2235                 hdr = ocrdma_hwq_head(&qp->sq);
2236                 hdr->cw = 0;
2237                 if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled)
2238                         hdr->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
2239                 if (wr->send_flags & IB_SEND_FENCE)
2240                         hdr->cw |=
2241                             (OCRDMA_FLAG_FENCE_L << OCRDMA_WQE_FLAGS_SHIFT);
2242                 if (wr->send_flags & IB_SEND_SOLICITED)
2243                         hdr->cw |=
2244                             (OCRDMA_FLAG_SOLICIT << OCRDMA_WQE_FLAGS_SHIFT);
2245                 hdr->total_len = 0;
2246                 switch (wr->opcode) {
2247                 case IB_WR_SEND_WITH_IMM:
2248                         hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
2249                         hdr->immdt = ntohl(wr->ex.imm_data);
2250                 case IB_WR_SEND:
2251                         hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
2252                         ocrdma_build_send(qp, hdr, wr);
2253                         break;
2254                 case IB_WR_SEND_WITH_INV:
2255                         hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT);
2256                         hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
2257                         hdr->lkey = wr->ex.invalidate_rkey;
2258                         status = ocrdma_build_send(qp, hdr, wr);
2259                         break;
2260                 case IB_WR_RDMA_WRITE_WITH_IMM:
2261                         hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
2262                         hdr->immdt = ntohl(wr->ex.imm_data);
2263                 case IB_WR_RDMA_WRITE:
2264                         hdr->cw |= (OCRDMA_WRITE << OCRDMA_WQE_OPCODE_SHIFT);
2265                         status = ocrdma_build_write(qp, hdr, wr);
2266                         break;
2267                 case IB_WR_RDMA_READ:
2268                         ocrdma_build_read(qp, hdr, wr);
2269                         break;
2270                 case IB_WR_LOCAL_INV:
2271                         hdr->cw |=
2272                             (OCRDMA_LKEY_INV << OCRDMA_WQE_OPCODE_SHIFT);
2273                         hdr->cw |= ((sizeof(struct ocrdma_hdr_wqe) +
2274                                         sizeof(struct ocrdma_sge)) /
2275                                 OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT;
2276                         hdr->lkey = wr->ex.invalidate_rkey;
2277                         break;
2278                 case IB_WR_REG_MR:
2279                         status = ocrdma_build_reg(qp, hdr, reg_wr(wr));
2280                         break;
2281                 default:
2282                         status = -EINVAL;
2283                         break;
2284                 }
2285                 if (status) {
2286                         *bad_wr = wr;
2287                         break;
2288                 }
2289                 if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled)
2290                         qp->wqe_wr_id_tbl[qp->sq.head].signaled = 1;
2291                 else
2292                         qp->wqe_wr_id_tbl[qp->sq.head].signaled = 0;
2293                 qp->wqe_wr_id_tbl[qp->sq.head].wrid = wr->wr_id;
2294                 ocrdma_cpu_to_le32(hdr, ((hdr->cw >> OCRDMA_WQE_SIZE_SHIFT) &
2295                                    OCRDMA_WQE_SIZE_MASK) * OCRDMA_WQE_STRIDE);
2296                 /* make sure wqe is written before adapter can access it */
2297                 wmb();
2298                 /* inform hw to start processing it */
2299                 ocrdma_ring_sq_db(qp);
2300
2301                 /* update pointer, counter for next wr */
2302                 ocrdma_hwq_inc_head(&qp->sq);
2303                 wr = wr->next;
2304         }
2305         spin_unlock_irqrestore(&qp->q_lock, flags);
2306         return status;
2307 }
2308
2309 static void ocrdma_ring_rq_db(struct ocrdma_qp *qp)
2310 {
2311         u32 val = qp->rq.dbid | (1 << OCRDMA_DB_RQ_SHIFT);
2312
2313         iowrite32(val, qp->rq_db);
2314 }
2315
2316 static void ocrdma_build_rqe(struct ocrdma_hdr_wqe *rqe, struct ib_recv_wr *wr,
2317                              u16 tag)
2318 {
2319         u32 wqe_size = 0;
2320         struct ocrdma_sge *sge;
2321         if (wr->num_sge)
2322                 wqe_size = (wr->num_sge * sizeof(*sge)) + sizeof(*rqe);
2323         else
2324                 wqe_size = sizeof(*sge) + sizeof(*rqe);
2325
2326         rqe->cw = ((wqe_size / OCRDMA_WQE_STRIDE) <<
2327                                 OCRDMA_WQE_SIZE_SHIFT);
2328         rqe->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
2329         rqe->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
2330         rqe->total_len = 0;
2331         rqe->rsvd_tag = tag;
2332         sge = (struct ocrdma_sge *)(rqe + 1);
2333         ocrdma_build_sges(rqe, sge, wr->num_sge, wr->sg_list);
2334         ocrdma_cpu_to_le32(rqe, wqe_size);
2335 }
2336
2337 int ocrdma_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2338                      struct ib_recv_wr **bad_wr)
2339 {
2340         int status = 0;
2341         unsigned long flags;
2342         struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
2343         struct ocrdma_hdr_wqe *rqe;
2344
2345         spin_lock_irqsave(&qp->q_lock, flags);
2346         if (qp->state == OCRDMA_QPS_RST || qp->state == OCRDMA_QPS_ERR) {
2347                 spin_unlock_irqrestore(&qp->q_lock, flags);
2348                 *bad_wr = wr;
2349                 return -EINVAL;
2350         }
2351         while (wr) {
2352                 if (ocrdma_hwq_free_cnt(&qp->rq) == 0 ||
2353                     wr->num_sge > qp->rq.max_sges) {
2354                         *bad_wr = wr;
2355                         status = -ENOMEM;
2356                         break;
2357                 }
2358                 rqe = ocrdma_hwq_head(&qp->rq);
2359                 ocrdma_build_rqe(rqe, wr, 0);
2360
2361                 qp->rqe_wr_id_tbl[qp->rq.head] = wr->wr_id;
2362                 /* make sure rqe is written before adapter can access it */
2363                 wmb();
2364
2365                 /* inform hw to start processing it */
2366                 ocrdma_ring_rq_db(qp);
2367
2368                 /* update pointer, counter for next wr */
2369                 ocrdma_hwq_inc_head(&qp->rq);
2370                 wr = wr->next;
2371         }
2372         spin_unlock_irqrestore(&qp->q_lock, flags);
2373         return status;
2374 }
2375
2376 /* cqe for srq's rqe can potentially arrive out of order.
2377  * index gives the entry in the shadow table where to store
2378  * the wr_id. tag/index is returned in cqe to reference back
2379  * for a given rqe.
2380  */
2381 static int ocrdma_srq_get_idx(struct ocrdma_srq *srq)
2382 {
2383         int row = 0;
2384         int indx = 0;
2385
2386         for (row = 0; row < srq->bit_fields_len; row++) {
2387                 if (srq->idx_bit_fields[row]) {
2388                         indx = ffs(srq->idx_bit_fields[row]);
2389                         indx = (row * 32) + (indx - 1);
2390                         BUG_ON(indx >= srq->rq.max_cnt);
2391                         ocrdma_srq_toggle_bit(srq, indx);
2392                         break;
2393                 }
2394         }
2395
2396         BUG_ON(row == srq->bit_fields_len);
2397         return indx + 1; /* Use from index 1 */
2398 }
2399
2400 static void ocrdma_ring_srq_db(struct ocrdma_srq *srq)
2401 {
2402         u32 val = srq->rq.dbid | (1 << 16);
2403
2404         iowrite32(val, srq->db + OCRDMA_DB_GEN2_SRQ_OFFSET);
2405 }
2406
2407 int ocrdma_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
2408                          struct ib_recv_wr **bad_wr)
2409 {
2410         int status = 0;
2411         unsigned long flags;
2412         struct ocrdma_srq *srq;
2413         struct ocrdma_hdr_wqe *rqe;
2414         u16 tag;
2415
2416         srq = get_ocrdma_srq(ibsrq);
2417
2418         spin_lock_irqsave(&srq->q_lock, flags);
2419         while (wr) {
2420                 if (ocrdma_hwq_free_cnt(&srq->rq) == 0 ||
2421                     wr->num_sge > srq->rq.max_sges) {
2422                         status = -ENOMEM;
2423                         *bad_wr = wr;
2424                         break;
2425                 }
2426                 tag = ocrdma_srq_get_idx(srq);
2427                 rqe = ocrdma_hwq_head(&srq->rq);
2428                 ocrdma_build_rqe(rqe, wr, tag);
2429
2430                 srq->rqe_wr_id_tbl[tag] = wr->wr_id;
2431                 /* make sure rqe is written before adapter can perform DMA */
2432                 wmb();
2433                 /* inform hw to start processing it */
2434                 ocrdma_ring_srq_db(srq);
2435                 /* update pointer, counter for next wr */
2436                 ocrdma_hwq_inc_head(&srq->rq);
2437                 wr = wr->next;
2438         }
2439         spin_unlock_irqrestore(&srq->q_lock, flags);
2440         return status;
2441 }
2442
2443 static enum ib_wc_status ocrdma_to_ibwc_err(u16 status)
2444 {
2445         enum ib_wc_status ibwc_status;
2446
2447         switch (status) {
2448         case OCRDMA_CQE_GENERAL_ERR:
2449                 ibwc_status = IB_WC_GENERAL_ERR;
2450                 break;
2451         case OCRDMA_CQE_LOC_LEN_ERR:
2452                 ibwc_status = IB_WC_LOC_LEN_ERR;
2453                 break;
2454         case OCRDMA_CQE_LOC_QP_OP_ERR:
2455                 ibwc_status = IB_WC_LOC_QP_OP_ERR;
2456                 break;
2457         case OCRDMA_CQE_LOC_EEC_OP_ERR:
2458                 ibwc_status = IB_WC_LOC_EEC_OP_ERR;
2459                 break;
2460         case OCRDMA_CQE_LOC_PROT_ERR:
2461                 ibwc_status = IB_WC_LOC_PROT_ERR;
2462                 break;
2463         case OCRDMA_CQE_WR_FLUSH_ERR:
2464                 ibwc_status = IB_WC_WR_FLUSH_ERR;
2465                 break;
2466         case OCRDMA_CQE_MW_BIND_ERR:
2467                 ibwc_status = IB_WC_MW_BIND_ERR;
2468                 break;
2469         case OCRDMA_CQE_BAD_RESP_ERR:
2470                 ibwc_status = IB_WC_BAD_RESP_ERR;
2471                 break;
2472         case OCRDMA_CQE_LOC_ACCESS_ERR:
2473                 ibwc_status = IB_WC_LOC_ACCESS_ERR;
2474                 break;
2475         case OCRDMA_CQE_REM_INV_REQ_ERR:
2476                 ibwc_status = IB_WC_REM_INV_REQ_ERR;
2477                 break;
2478         case OCRDMA_CQE_REM_ACCESS_ERR:
2479                 ibwc_status = IB_WC_REM_ACCESS_ERR;
2480                 break;
2481         case OCRDMA_CQE_REM_OP_ERR:
2482                 ibwc_status = IB_WC_REM_OP_ERR;
2483                 break;
2484         case OCRDMA_CQE_RETRY_EXC_ERR:
2485                 ibwc_status = IB_WC_RETRY_EXC_ERR;
2486                 break;
2487         case OCRDMA_CQE_RNR_RETRY_EXC_ERR:
2488                 ibwc_status = IB_WC_RNR_RETRY_EXC_ERR;
2489                 break;
2490         case OCRDMA_CQE_LOC_RDD_VIOL_ERR:
2491                 ibwc_status = IB_WC_LOC_RDD_VIOL_ERR;
2492                 break;
2493         case OCRDMA_CQE_REM_INV_RD_REQ_ERR:
2494                 ibwc_status = IB_WC_REM_INV_RD_REQ_ERR;
2495                 break;
2496         case OCRDMA_CQE_REM_ABORT_ERR:
2497                 ibwc_status = IB_WC_REM_ABORT_ERR;
2498                 break;
2499         case OCRDMA_CQE_INV_EECN_ERR:
2500                 ibwc_status = IB_WC_INV_EECN_ERR;
2501                 break;
2502         case OCRDMA_CQE_INV_EEC_STATE_ERR:
2503                 ibwc_status = IB_WC_INV_EEC_STATE_ERR;
2504                 break;
2505         case OCRDMA_CQE_FATAL_ERR:
2506                 ibwc_status = IB_WC_FATAL_ERR;
2507                 break;
2508         case OCRDMA_CQE_RESP_TIMEOUT_ERR:
2509                 ibwc_status = IB_WC_RESP_TIMEOUT_ERR;
2510                 break;
2511         default:
2512                 ibwc_status = IB_WC_GENERAL_ERR;
2513                 break;
2514         }
2515         return ibwc_status;
2516 }
2517
2518 static void ocrdma_update_wc(struct ocrdma_qp *qp, struct ib_wc *ibwc,
2519                       u32 wqe_idx)
2520 {
2521         struct ocrdma_hdr_wqe *hdr;
2522         struct ocrdma_sge *rw;
2523         int opcode;
2524
2525         hdr = ocrdma_hwq_head_from_idx(&qp->sq, wqe_idx);
2526
2527         ibwc->wr_id = qp->wqe_wr_id_tbl[wqe_idx].wrid;
2528         /* Undo the hdr->cw swap */
2529         opcode = le32_to_cpu(hdr->cw) & OCRDMA_WQE_OPCODE_MASK;
2530         switch (opcode) {
2531         case OCRDMA_WRITE:
2532                 ibwc->opcode = IB_WC_RDMA_WRITE;
2533                 break;
2534         case OCRDMA_READ:
2535                 rw = (struct ocrdma_sge *)(hdr + 1);
2536                 ibwc->opcode = IB_WC_RDMA_READ;
2537                 ibwc->byte_len = rw->len;
2538                 break;
2539         case OCRDMA_SEND:
2540                 ibwc->opcode = IB_WC_SEND;
2541                 break;
2542         case OCRDMA_FR_MR:
2543                 ibwc->opcode = IB_WC_REG_MR;
2544                 break;
2545         case OCRDMA_LKEY_INV:
2546                 ibwc->opcode = IB_WC_LOCAL_INV;
2547                 break;
2548         default:
2549                 ibwc->status = IB_WC_GENERAL_ERR;
2550                 pr_err("%s() invalid opcode received = 0x%x\n",
2551                        __func__, hdr->cw & OCRDMA_WQE_OPCODE_MASK);
2552                 break;
2553         }
2554 }
2555
2556 static void ocrdma_set_cqe_status_flushed(struct ocrdma_qp *qp,
2557                                                 struct ocrdma_cqe *cqe)
2558 {
2559         if (is_cqe_for_sq(cqe)) {
2560                 cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2561                                 cqe->flags_status_srcqpn) &
2562                                         ~OCRDMA_CQE_STATUS_MASK);
2563                 cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2564                                 cqe->flags_status_srcqpn) |
2565                                 (OCRDMA_CQE_WR_FLUSH_ERR <<
2566                                         OCRDMA_CQE_STATUS_SHIFT));
2567         } else {
2568                 if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
2569                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2570                                         cqe->flags_status_srcqpn) &
2571                                                 ~OCRDMA_CQE_UD_STATUS_MASK);
2572                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2573                                         cqe->flags_status_srcqpn) |
2574                                         (OCRDMA_CQE_WR_FLUSH_ERR <<
2575                                                 OCRDMA_CQE_UD_STATUS_SHIFT));
2576                 } else {
2577                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2578                                         cqe->flags_status_srcqpn) &
2579                                                 ~OCRDMA_CQE_STATUS_MASK);
2580                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2581                                         cqe->flags_status_srcqpn) |
2582                                         (OCRDMA_CQE_WR_FLUSH_ERR <<
2583                                                 OCRDMA_CQE_STATUS_SHIFT));
2584                 }
2585         }
2586 }
2587
2588 static bool ocrdma_update_err_cqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
2589                                   struct ocrdma_qp *qp, int status)
2590 {
2591         bool expand = false;
2592
2593         ibwc->byte_len = 0;
2594         ibwc->qp = &qp->ibqp;
2595         ibwc->status = ocrdma_to_ibwc_err(status);
2596
2597         ocrdma_flush_qp(qp);
2598         ocrdma_qp_state_change(qp, IB_QPS_ERR, NULL);
2599
2600         /* if wqe/rqe pending for which cqe needs to be returned,
2601          * trigger inflating it.
2602          */
2603         if (!is_hw_rq_empty(qp) || !is_hw_sq_empty(qp)) {
2604                 expand = true;
2605                 ocrdma_set_cqe_status_flushed(qp, cqe);
2606         }
2607         return expand;
2608 }
2609
2610 static int ocrdma_update_err_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
2611                                   struct ocrdma_qp *qp, int status)
2612 {
2613         ibwc->opcode = IB_WC_RECV;
2614         ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
2615         ocrdma_hwq_inc_tail(&qp->rq);
2616
2617         return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
2618 }
2619
2620 static int ocrdma_update_err_scqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
2621                                   struct ocrdma_qp *qp, int status)
2622 {
2623         ocrdma_update_wc(qp, ibwc, qp->sq.tail);
2624         ocrdma_hwq_inc_tail(&qp->sq);
2625
2626         return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
2627 }
2628
2629
2630 static bool ocrdma_poll_err_scqe(struct ocrdma_qp *qp,
2631                                  struct ocrdma_cqe *cqe, struct ib_wc *ibwc,
2632                                  bool *polled, bool *stop)
2633 {
2634         bool expand;
2635         struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);
2636         int status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2637                 OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
2638         if (status < OCRDMA_MAX_CQE_ERR)
2639                 atomic_inc(&dev->cqe_err_stats[status]);
2640
2641         /* when hw sq is empty, but rq is not empty, so we continue
2642          * to keep the cqe in order to get the cq event again.
2643          */
2644         if (is_hw_sq_empty(qp) && !is_hw_rq_empty(qp)) {
2645                 /* when cq for rq and sq is same, it is safe to return
2646                  * flush cqe for RQEs.
2647                  */
2648                 if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
2649                         *polled = true;
2650                         status = OCRDMA_CQE_WR_FLUSH_ERR;
2651                         expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
2652                 } else {
2653                         /* stop processing further cqe as this cqe is used for
2654                          * triggering cq event on buddy cq of RQ.
2655                          * When QP is destroyed, this cqe will be removed
2656                          * from the cq's hardware q.
2657                          */
2658                         *polled = false;
2659                         *stop = true;
2660                         expand = false;
2661                 }
2662         } else if (is_hw_sq_empty(qp)) {
2663                 /* Do nothing */
2664                 expand = false;
2665                 *polled = false;
2666                 *stop = false;
2667         } else {
2668                 *polled = true;
2669                 expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
2670         }
2671         return expand;
2672 }
2673
2674 static bool ocrdma_poll_success_scqe(struct ocrdma_qp *qp,
2675                                      struct ocrdma_cqe *cqe,
2676                                      struct ib_wc *ibwc, bool *polled)
2677 {
2678         bool expand = false;
2679         int tail = qp->sq.tail;
2680         u32 wqe_idx;
2681
2682         if (!qp->wqe_wr_id_tbl[tail].signaled) {
2683                 *polled = false;    /* WC cannot be consumed yet */
2684         } else {
2685                 ibwc->status = IB_WC_SUCCESS;
2686                 ibwc->wc_flags = 0;
2687                 ibwc->qp = &qp->ibqp;
2688                 ocrdma_update_wc(qp, ibwc, tail);
2689                 *polled = true;
2690         }
2691         wqe_idx = (le32_to_cpu(cqe->wq.wqeidx) &
2692                         OCRDMA_CQE_WQEIDX_MASK) & qp->sq.max_wqe_idx;
2693         if (tail != wqe_idx)
2694                 expand = true; /* Coalesced CQE can't be consumed yet */
2695
2696         ocrdma_hwq_inc_tail(&qp->sq);
2697         return expand;
2698 }
2699
2700 static bool ocrdma_poll_scqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
2701                              struct ib_wc *ibwc, bool *polled, bool *stop)
2702 {
2703         int status;
2704         bool expand;
2705
2706         status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2707                 OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
2708
2709         if (status == OCRDMA_CQE_SUCCESS)
2710                 expand = ocrdma_poll_success_scqe(qp, cqe, ibwc, polled);
2711         else
2712                 expand = ocrdma_poll_err_scqe(qp, cqe, ibwc, polled, stop);
2713         return expand;
2714 }
2715
2716 static int ocrdma_update_ud_rcqe(struct ocrdma_dev *dev, struct ib_wc *ibwc,
2717                                  struct ocrdma_cqe *cqe)
2718 {
2719         int status;
2720         u16 hdr_type = 0;
2721
2722         status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2723                 OCRDMA_CQE_UD_STATUS_MASK) >> OCRDMA_CQE_UD_STATUS_SHIFT;
2724         ibwc->src_qp = le32_to_cpu(cqe->flags_status_srcqpn) &
2725                                                 OCRDMA_CQE_SRCQP_MASK;
2726         ibwc->pkey_index = 0;
2727         ibwc->wc_flags = IB_WC_GRH;
2728         ibwc->byte_len = (le32_to_cpu(cqe->ud.rxlen_pkey) >>
2729                           OCRDMA_CQE_UD_XFER_LEN_SHIFT) &
2730                           OCRDMA_CQE_UD_XFER_LEN_MASK;
2731
2732         if (ocrdma_is_udp_encap_supported(dev)) {
2733                 hdr_type = (le32_to_cpu(cqe->ud.rxlen_pkey) >>
2734                             OCRDMA_CQE_UD_L3TYPE_SHIFT) &
2735                             OCRDMA_CQE_UD_L3TYPE_MASK;
2736                 ibwc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE;
2737                 ibwc->network_hdr_type = hdr_type;
2738         }
2739
2740         return status;
2741 }
2742
2743 static void ocrdma_update_free_srq_cqe(struct ib_wc *ibwc,
2744                                        struct ocrdma_cqe *cqe,
2745                                        struct ocrdma_qp *qp)
2746 {
2747         unsigned long flags;
2748         struct ocrdma_srq *srq;
2749         u32 wqe_idx;
2750
2751         srq = get_ocrdma_srq(qp->ibqp.srq);
2752         wqe_idx = (le32_to_cpu(cqe->rq.buftag_qpn) >>
2753                 OCRDMA_CQE_BUFTAG_SHIFT) & srq->rq.max_wqe_idx;
2754         BUG_ON(wqe_idx < 1);
2755
2756         ibwc->wr_id = srq->rqe_wr_id_tbl[wqe_idx];
2757         spin_lock_irqsave(&srq->q_lock, flags);
2758         ocrdma_srq_toggle_bit(srq, wqe_idx - 1);
2759         spin_unlock_irqrestore(&srq->q_lock, flags);
2760         ocrdma_hwq_inc_tail(&srq->rq);
2761 }
2762
2763 static bool ocrdma_poll_err_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
2764                                 struct ib_wc *ibwc, bool *polled, bool *stop,
2765                                 int status)
2766 {
2767         bool expand;
2768         struct ocrdma_dev *dev = get_ocrdma_dev(qp->ibqp.device);
2769
2770         if (status < OCRDMA_MAX_CQE_ERR)
2771                 atomic_inc(&dev->cqe_err_stats[status]);
2772
2773         /* when hw_rq is empty, but wq is not empty, so continue
2774          * to keep the cqe to get the cq event again.
2775          */
2776         if (is_hw_rq_empty(qp) && !is_hw_sq_empty(qp)) {
2777                 if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
2778                         *polled = true;
2779                         status = OCRDMA_CQE_WR_FLUSH_ERR;
2780                         expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
2781                 } else {
2782                         *polled = false;
2783                         *stop = true;
2784                         expand = false;
2785                 }
2786         } else if (is_hw_rq_empty(qp)) {
2787                 /* Do nothing */
2788                 expand = false;
2789                 *polled = false;
2790                 *stop = false;
2791         } else {
2792                 *polled = true;
2793                 expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
2794         }
2795         return expand;
2796 }
2797
2798 static void ocrdma_poll_success_rcqe(struct ocrdma_qp *qp,
2799                                      struct ocrdma_cqe *cqe, struct ib_wc *ibwc)
2800 {
2801         struct ocrdma_dev *dev;
2802
2803         dev = get_ocrdma_dev(qp->ibqp.device);
2804         ibwc->opcode = IB_WC_RECV;
2805         ibwc->qp = &qp->ibqp;
2806         ibwc->status = IB_WC_SUCCESS;
2807
2808         if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI)
2809                 ocrdma_update_ud_rcqe(dev, ibwc, cqe);
2810         else
2811                 ibwc->byte_len = le32_to_cpu(cqe->rq.rxlen);
2812
2813         if (is_cqe_imm(cqe)) {
2814                 ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
2815                 ibwc->wc_flags |= IB_WC_WITH_IMM;
2816         } else if (is_cqe_wr_imm(cqe)) {
2817                 ibwc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
2818                 ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
2819                 ibwc->wc_flags |= IB_WC_WITH_IMM;
2820         } else if (is_cqe_invalidated(cqe)) {
2821                 ibwc->ex.invalidate_rkey = le32_to_cpu(cqe->rq.lkey_immdt);
2822                 ibwc->wc_flags |= IB_WC_WITH_INVALIDATE;
2823         }
2824         if (qp->ibqp.srq) {
2825                 ocrdma_update_free_srq_cqe(ibwc, cqe, qp);
2826         } else {
2827                 ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
2828                 ocrdma_hwq_inc_tail(&qp->rq);
2829         }
2830 }
2831
2832 static bool ocrdma_poll_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
2833                              struct ib_wc *ibwc, bool *polled, bool *stop)
2834 {
2835         int status;
2836         bool expand = false;
2837
2838         ibwc->wc_flags = 0;
2839         if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
2840                 status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2841                                         OCRDMA_CQE_UD_STATUS_MASK) >>
2842                                         OCRDMA_CQE_UD_STATUS_SHIFT;
2843         } else {
2844                 status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2845                              OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
2846         }
2847
2848         if (status == OCRDMA_CQE_SUCCESS) {
2849                 *polled = true;
2850                 ocrdma_poll_success_rcqe(qp, cqe, ibwc);
2851         } else {
2852                 expand = ocrdma_poll_err_rcqe(qp, cqe, ibwc, polled, stop,
2853                                               status);
2854         }
2855         return expand;
2856 }
2857
2858 static void ocrdma_change_cq_phase(struct ocrdma_cq *cq, struct ocrdma_cqe *cqe,
2859                                    u16 cur_getp)
2860 {
2861         if (cq->phase_change) {
2862                 if (cur_getp == 0)
2863                         cq->phase = (~cq->phase & OCRDMA_CQE_VALID);
2864         } else {
2865                 /* clear valid bit */
2866                 cqe->flags_status_srcqpn = 0;
2867         }
2868 }
2869
2870 static int ocrdma_poll_hwcq(struct ocrdma_cq *cq, int num_entries,
2871                             struct ib_wc *ibwc)
2872 {
2873         u16 qpn = 0;
2874         int i = 0;
2875         bool expand = false;
2876         int polled_hw_cqes = 0;
2877         struct ocrdma_qp *qp = NULL;
2878         struct ocrdma_dev *dev = get_ocrdma_dev(cq->ibcq.device);
2879         struct ocrdma_cqe *cqe;
2880         u16 cur_getp; bool polled = false; bool stop = false;
2881
2882         cur_getp = cq->getp;
2883         while (num_entries) {
2884                 cqe = cq->va + cur_getp;
2885                 /* check whether valid cqe or not */
2886                 if (!is_cqe_valid(cq, cqe))
2887                         break;
2888                 qpn = (le32_to_cpu(cqe->cmn.qpn) & OCRDMA_CQE_QPN_MASK);
2889                 /* ignore discarded cqe */
2890                 if (qpn == 0)
2891                         goto skip_cqe;
2892                 qp = dev->qp_tbl[qpn];
2893                 BUG_ON(qp == NULL);
2894
2895                 if (is_cqe_for_sq(cqe)) {
2896                         expand = ocrdma_poll_scqe(qp, cqe, ibwc, &polled,
2897                                                   &stop);
2898                 } else {
2899                         expand = ocrdma_poll_rcqe(qp, cqe, ibwc, &polled,
2900                                                   &stop);
2901                 }
2902                 if (expand)
2903                         goto expand_cqe;
2904                 if (stop)
2905                         goto stop_cqe;
2906                 /* clear qpn to avoid duplicate processing by discard_cqe() */
2907                 cqe->cmn.qpn = 0;
2908 skip_cqe:
2909                 polled_hw_cqes += 1;
2910                 cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
2911                 ocrdma_change_cq_phase(cq, cqe, cur_getp);
2912 expand_cqe:
2913                 if (polled) {
2914                         num_entries -= 1;
2915                         i += 1;
2916                         ibwc = ibwc + 1;
2917                         polled = false;
2918                 }
2919         }
2920 stop_cqe:
2921         cq->getp = cur_getp;
2922
2923         if (polled_hw_cqes)
2924                 ocrdma_ring_cq_db(dev, cq->id, false, false, polled_hw_cqes);
2925
2926         return i;
2927 }
2928
2929 /* insert error cqe if the QP's SQ or RQ's CQ matches the CQ under poll. */
2930 static int ocrdma_add_err_cqe(struct ocrdma_cq *cq, int num_entries,
2931                               struct ocrdma_qp *qp, struct ib_wc *ibwc)
2932 {
2933         int err_cqes = 0;
2934
2935         while (num_entries) {
2936                 if (is_hw_sq_empty(qp) && is_hw_rq_empty(qp))
2937                         break;
2938                 if (!is_hw_sq_empty(qp) && qp->sq_cq == cq) {
2939                         ocrdma_update_wc(qp, ibwc, qp->sq.tail);
2940                         ocrdma_hwq_inc_tail(&qp->sq);
2941                 } else if (!is_hw_rq_empty(qp) && qp->rq_cq == cq) {
2942                         ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
2943                         ocrdma_hwq_inc_tail(&qp->rq);
2944                 } else {
2945                         return err_cqes;
2946                 }
2947                 ibwc->byte_len = 0;
2948                 ibwc->status = IB_WC_WR_FLUSH_ERR;
2949                 ibwc = ibwc + 1;
2950                 err_cqes += 1;
2951                 num_entries -= 1;
2952         }
2953         return err_cqes;
2954 }
2955
2956 int ocrdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
2957 {
2958         int cqes_to_poll = num_entries;
2959         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
2960         struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
2961         int num_os_cqe = 0, err_cqes = 0;
2962         struct ocrdma_qp *qp;
2963         unsigned long flags;
2964
2965         /* poll cqes from adapter CQ */
2966         spin_lock_irqsave(&cq->cq_lock, flags);
2967         num_os_cqe = ocrdma_poll_hwcq(cq, cqes_to_poll, wc);
2968         spin_unlock_irqrestore(&cq->cq_lock, flags);
2969         cqes_to_poll -= num_os_cqe;
2970
2971         if (cqes_to_poll) {
2972                 wc = wc + num_os_cqe;
2973                 /* adapter returns single error cqe when qp moves to
2974                  * error state. So insert error cqes with wc_status as
2975                  * FLUSHED for pending WQEs and RQEs of QP's SQ and RQ
2976                  * respectively which uses this CQ.
2977                  */
2978                 spin_lock_irqsave(&dev->flush_q_lock, flags);
2979                 list_for_each_entry(qp, &cq->sq_head, sq_entry) {
2980                         if (cqes_to_poll == 0)
2981                                 break;
2982                         err_cqes = ocrdma_add_err_cqe(cq, cqes_to_poll, qp, wc);
2983                         cqes_to_poll -= err_cqes;
2984                         num_os_cqe += err_cqes;
2985                         wc = wc + err_cqes;
2986                 }
2987                 spin_unlock_irqrestore(&dev->flush_q_lock, flags);
2988         }
2989         return num_os_cqe;
2990 }
2991
2992 int ocrdma_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags cq_flags)
2993 {
2994         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
2995         struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
2996         u16 cq_id;
2997         unsigned long flags;
2998         bool arm_needed = false, sol_needed = false;
2999
3000         cq_id = cq->id;
3001
3002         spin_lock_irqsave(&cq->cq_lock, flags);
3003         if (cq_flags & IB_CQ_NEXT_COMP || cq_flags & IB_CQ_SOLICITED)
3004                 arm_needed = true;
3005         if (cq_flags & IB_CQ_SOLICITED)
3006                 sol_needed = true;
3007
3008         ocrdma_ring_cq_db(dev, cq_id, arm_needed, sol_needed, 0);
3009         spin_unlock_irqrestore(&cq->cq_lock, flags);
3010
3011         return 0;
3012 }
3013
3014 struct ib_mr *ocrdma_alloc_mr(struct ib_pd *ibpd,
3015                               enum ib_mr_type mr_type,
3016                               u32 max_num_sg)
3017 {
3018         int status;
3019         struct ocrdma_mr *mr;
3020         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
3021         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
3022
3023         if (mr_type != IB_MR_TYPE_MEM_REG)
3024                 return ERR_PTR(-EINVAL);
3025
3026         if (max_num_sg > dev->attr.max_pages_per_frmr)
3027                 return ERR_PTR(-EINVAL);
3028
3029         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
3030         if (!mr)
3031                 return ERR_PTR(-ENOMEM);
3032
3033         mr->pages = kcalloc(max_num_sg, sizeof(u64), GFP_KERNEL);
3034         if (!mr->pages) {
3035                 status = -ENOMEM;
3036                 goto pl_err;
3037         }
3038
3039         status = ocrdma_get_pbl_info(dev, mr, max_num_sg);
3040         if (status)
3041                 goto pbl_err;
3042         mr->hwmr.fr_mr = 1;
3043         mr->hwmr.remote_rd = 0;
3044         mr->hwmr.remote_wr = 0;
3045         mr->hwmr.local_rd = 0;
3046         mr->hwmr.local_wr = 0;
3047         mr->hwmr.mw_bind = 0;
3048         status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
3049         if (status)
3050                 goto pbl_err;
3051         status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, 0);
3052         if (status)
3053                 goto mbx_err;
3054         mr->ibmr.rkey = mr->hwmr.lkey;
3055         mr->ibmr.lkey = mr->hwmr.lkey;
3056         dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] =
3057                 (unsigned long) mr;
3058         return &mr->ibmr;
3059 mbx_err:
3060         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
3061 pbl_err:
3062         kfree(mr->pages);
3063 pl_err:
3064         kfree(mr);
3065         return ERR_PTR(-ENOMEM);
3066 }
3067
3068 static int ocrdma_set_page(struct ib_mr *ibmr, u64 addr)
3069 {
3070         struct ocrdma_mr *mr = get_ocrdma_mr(ibmr);
3071
3072         if (unlikely(mr->npages == mr->hwmr.num_pbes))
3073                 return -ENOMEM;
3074
3075         mr->pages[mr->npages++] = addr;
3076
3077         return 0;
3078 }
3079
3080 int ocrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
3081                      unsigned int *sg_offset)
3082 {
3083         struct ocrdma_mr *mr = get_ocrdma_mr(ibmr);
3084
3085         mr->npages = 0;
3086
3087         return ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, ocrdma_set_page);
3088 }