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