drivers/infiniband/hw/ocrdma/ocrdma_verbs.c

   1 /*******************************************************************
   2  * This file is part of the Emulex RoCE Device Driver for          *
   3  * RoCE (RDMA over Converged Ethernet) adapters.                   *
   4  * Copyright (C) 2008-2012 Emulex. All rights reserved.            *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  *                                                                 *
   8  * This program is free software; you can redistribute it and/or   *
   9  * modify it under the terms of version 2 of the GNU General       *
  10  * Public License as published by the Free Software Foundation.    *
  11  * This program is distributed in the hope that it will be useful. *
  12  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  13  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  14  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  15  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  16  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  17  * more details, a copy of which can be found in the file COPYING  *
  18  * included with this package.                                     *
  19  *
  20  * Contact Information:
  21  * linux-drivers@emulex.com
  22  *
  23  * Emulex
  24  * 3333 Susan Street
  25  * Costa Mesa, CA 92626
  26  *******************************************************************/
  27
  28 #include <linux/dma-mapping.h>
  29 #include <rdma/ib_verbs.h>
  30 #include <rdma/ib_user_verbs.h>
  31 #include <rdma/iw_cm.h>
  32 #include <rdma/ib_umem.h>
  33 #include <rdma/ib_addr.h>
  34
  35 #include "ocrdma.h"
  36 #include "ocrdma_hw.h"
  37 #include "ocrdma_verbs.h"
  38 #include "ocrdma_abi.h"
  39
  40 int ocrdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
  41 {
  42         if (index > 1)
  43                 return -EINVAL;
  44
  45         *pkey = 0xffff;
  46         return 0;
  47 }
  48
  49 int ocrdma_query_gid(struct ib_device *ibdev, u8 port,
  50                      int index, union ib_gid *sgid)
  51 {
  52         struct ocrdma_dev *dev;
  53
  54         dev = get_ocrdma_dev(ibdev);
  55         memset(sgid, 0, sizeof(*sgid));
  56         if (index >= OCRDMA_MAX_SGID)
  57                 return -EINVAL;
  58
  59         memcpy(sgid, &dev->sgid_tbl[index], sizeof(*sgid));
  60
  61         return 0;
  62 }
  63
  64 int ocrdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr)
  65 {
  66         struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
  67
  68         memset(attr, 0, sizeof *attr);
  69         memcpy(&attr->fw_ver, &dev->attr.fw_ver[0],
  70                min(sizeof(dev->attr.fw_ver), sizeof(attr->fw_ver)));
  71         ocrdma_get_guid(dev, (u8 *)&attr->sys_image_guid);
  72         attr->max_mr_size = ~0ull;
  73         attr->page_size_cap = 0xffff000;
  74         attr->vendor_id = dev->nic_info.pdev->vendor;
  75         attr->vendor_part_id = dev->nic_info.pdev->device;
  76         attr->hw_ver = 0;
  77         attr->max_qp = dev->attr.max_qp;
  78         attr->max_ah = OCRDMA_MAX_AH;
  79         attr->max_qp_wr = dev->attr.max_wqe;
  80
  81         attr->device_cap_flags = IB_DEVICE_CURR_QP_STATE_MOD |
  82                                         IB_DEVICE_RC_RNR_NAK_GEN |
  83                                         IB_DEVICE_SHUTDOWN_PORT |
  84                                         IB_DEVICE_SYS_IMAGE_GUID |
  85                                         IB_DEVICE_LOCAL_DMA_LKEY |
  86                                         IB_DEVICE_MEM_MGT_EXTENSIONS;
  87         attr->max_sge = min(dev->attr.max_send_sge, dev->attr.max_srq_sge);
  88         attr->max_sge_rd = 0;
  89         attr->max_cq = dev->attr.max_cq;
  90         attr->max_cqe = dev->attr.max_cqe;
  91         attr->max_mr = dev->attr.max_mr;
  92         attr->max_mw = 0;
  93         attr->max_pd = dev->attr.max_pd;
  94         attr->atomic_cap = 0;
  95         attr->max_fmr = 0;
  96         attr->max_map_per_fmr = 0;
  97         attr->max_qp_rd_atom =
  98             min(dev->attr.max_ord_per_qp, dev->attr.max_ird_per_qp);
  99         attr->max_qp_init_rd_atom = dev->attr.max_ord_per_qp;
 100         attr->max_srq = dev->attr.max_srq;
 101         attr->max_srq_sge = dev->attr.max_srq_sge;
 102         attr->max_srq_wr = dev->attr.max_rqe;
 103         attr->local_ca_ack_delay = dev->attr.local_ca_ack_delay;
 104         attr->max_fast_reg_page_list_len = 0;
 105         attr->max_pkeys = 1;
 106         return 0;
 107 }
 108
 109 static inline void get_link_speed_and_width(struct ocrdma_dev *dev,
 110                                             u8 *ib_speed, u8 *ib_width)
 111 {
 112         int status;
 113         u8 speed;
 114
 115         status = ocrdma_mbx_get_link_speed(dev, &speed);
 116         if (status)
 117                 speed = OCRDMA_PHYS_LINK_SPEED_ZERO;
 118
 119         switch (speed) {
 120         case OCRDMA_PHYS_LINK_SPEED_1GBPS:
 121                 *ib_speed = IB_SPEED_SDR;
 122                 *ib_width = IB_WIDTH_1X;
 123                 break;
 124
 125         case OCRDMA_PHYS_LINK_SPEED_10GBPS:
 126                 *ib_speed = IB_SPEED_QDR;
 127                 *ib_width = IB_WIDTH_1X;
 128                 break;
 129
 130         case OCRDMA_PHYS_LINK_SPEED_20GBPS:
 131                 *ib_speed = IB_SPEED_DDR;
 132                 *ib_width = IB_WIDTH_4X;
 133                 break;
 134
 135         case OCRDMA_PHYS_LINK_SPEED_40GBPS:
 136                 *ib_speed = IB_SPEED_QDR;
 137                 *ib_width = IB_WIDTH_4X;
 138                 break;
 139
 140         default:
 141                 /* Unsupported */
 142                 *ib_speed = IB_SPEED_SDR;
 143                 *ib_width = IB_WIDTH_1X;
 144         };
 145 }
 146
 147
 148 int ocrdma_query_port(struct ib_device *ibdev,
 149                       u8 port, struct ib_port_attr *props)
 150 {
 151         enum ib_port_state port_state;
 152         struct ocrdma_dev *dev;
 153         struct net_device *netdev;
 154
 155         dev = get_ocrdma_dev(ibdev);
 156         if (port > 1) {
 157                 pr_err("%s(%d) invalid_port=0x%x\n", __func__,
 158                        dev->id, port);
 159                 return -EINVAL;
 160         }
 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 = 5;
 165         } else {
 166                 port_state = IB_PORT_DOWN;
 167                 props->phys_state = 3;
 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 =
 177             IB_PORT_CM_SUP |
 178             IB_PORT_REINIT_SUP |
 179             IB_PORT_DEVICE_MGMT_SUP | IB_PORT_VENDOR_CLASS_SUP;
 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 int ocrdma_modify_port(struct ib_device *ibdev, u8 port, int mask,
 192                        struct ib_port_modify *props)
 193 {
 194         struct ocrdma_dev *dev;
 195
 196         dev = get_ocrdma_dev(ibdev);
 197         if (port > 1) {
 198                 pr_err("%s(%d) invalid_port=0x%x\n", __func__, dev->id, port);
 199                 return -EINVAL;
 200         }
 201         return 0;
 202 }
 203
 204 static int ocrdma_add_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
 205                            unsigned long len)
 206 {
 207         struct ocrdma_mm *mm;
 208
 209         mm = kzalloc(sizeof(*mm), GFP_KERNEL);
 210         if (mm == NULL)
 211                 return -ENOMEM;
 212         mm->key.phy_addr = phy_addr;
 213         mm->key.len = len;
 214         INIT_LIST_HEAD(&mm->entry);
 215
 216         mutex_lock(&uctx->mm_list_lock);
 217         list_add_tail(&mm->entry, &uctx->mm_head);
 218         mutex_unlock(&uctx->mm_list_lock);
 219         return 0;
 220 }
 221
 222 static void ocrdma_del_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
 223                             unsigned long len)
 224 {
 225         struct ocrdma_mm *mm, *tmp;
 226
 227         mutex_lock(&uctx->mm_list_lock);
 228         list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
 229                 if (len != mm->key.len && phy_addr != mm->key.phy_addr)
 230                         continue;
 231
 232                 list_del(&mm->entry);
 233                 kfree(mm);
 234                 break;
 235         }
 236         mutex_unlock(&uctx->mm_list_lock);
 237 }
 238
 239 static bool ocrdma_search_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
 240                               unsigned long len)
 241 {
 242         bool found = false;
 243         struct ocrdma_mm *mm;
 244
 245         mutex_lock(&uctx->mm_list_lock);
 246         list_for_each_entry(mm, &uctx->mm_head, entry) {
 247                 if (len != mm->key.len && phy_addr != mm->key.phy_addr)
 248                         continue;
 249
 250                 found = true;
 251                 break;
 252         }
 253         mutex_unlock(&uctx->mm_list_lock);
 254         return found;
 255 }
 256
 257 static struct ocrdma_pd *_ocrdma_alloc_pd(struct ocrdma_dev *dev,
 258                                           struct ocrdma_ucontext *uctx,
 259                                           struct ib_udata *udata)
 260 {
 261         struct ocrdma_pd *pd = NULL;
 262         int status = 0;
 263
 264         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 265         if (!pd)
 266                 return ERR_PTR(-ENOMEM);
 267
 268         if (udata && uctx) {
 269                 pd->dpp_enabled =
 270                         dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY;
 271                 pd->num_dpp_qp =
 272                         pd->dpp_enabled ? OCRDMA_PD_MAX_DPP_ENABLED_QP : 0;
 273         }
 274
 275 retry:
 276         status = ocrdma_mbx_alloc_pd(dev, pd);
 277         if (status) {
 278                 if (pd->dpp_enabled) {
 279                         pd->dpp_enabled = false;
 280                         pd->num_dpp_qp = 0;
 281                         goto retry;
 282                 } else {
 283                         kfree(pd);
 284                         return ERR_PTR(status);
 285                 }
 286         }
 287
 288         return pd;
 289 }
 290
 291 static inline int is_ucontext_pd(struct ocrdma_ucontext *uctx,
 292                                  struct ocrdma_pd *pd)
 293 {
 294         return (uctx->cntxt_pd == pd ? true : false);
 295 }
 296
 297 static int _ocrdma_dealloc_pd(struct ocrdma_dev *dev,
 298                               struct ocrdma_pd *pd)
 299 {
 300         int status = 0;
 301
 302         status = ocrdma_mbx_dealloc_pd(dev, pd);
 303         kfree(pd);
 304         return status;
 305 }
 306
 307 static int ocrdma_alloc_ucontext_pd(struct ocrdma_dev *dev,
 308                                     struct ocrdma_ucontext *uctx,
 309                                     struct ib_udata *udata)
 310 {
 311         int status = 0;
 312
 313         uctx->cntxt_pd = _ocrdma_alloc_pd(dev, uctx, udata);
 314         if (IS_ERR(uctx->cntxt_pd)) {
 315                 status = PTR_ERR(uctx->cntxt_pd);
 316                 uctx->cntxt_pd = NULL;
 317                 goto err;
 318         }
 319
 320         uctx->cntxt_pd->uctx = uctx;
 321         uctx->cntxt_pd->ibpd.device = &dev->ibdev;
 322 err:
 323         return status;
 324 }
 325
 326 static int ocrdma_dealloc_ucontext_pd(struct ocrdma_ucontext *uctx)
 327 {
 328         int status = 0;
 329         struct ocrdma_pd *pd = uctx->cntxt_pd;
 330         struct ocrdma_dev *dev = get_ocrdma_dev(pd->ibpd.device);
 331
 332         BUG_ON(uctx->pd_in_use);
 333         uctx->cntxt_pd = NULL;
 334         status = _ocrdma_dealloc_pd(dev, pd);
 335         return status;
 336 }
 337
 338 static struct ocrdma_pd *ocrdma_get_ucontext_pd(struct ocrdma_ucontext *uctx)
 339 {
 340         struct ocrdma_pd *pd = NULL;
 341
 342         mutex_lock(&uctx->mm_list_lock);
 343         if (!uctx->pd_in_use) {
 344                 uctx->pd_in_use = true;
 345                 pd = uctx->cntxt_pd;
 346         }
 347         mutex_unlock(&uctx->mm_list_lock);
 348
 349         return pd;
 350 }
 351
 352 static void ocrdma_release_ucontext_pd(struct ocrdma_ucontext *uctx)
 353 {
 354         mutex_lock(&uctx->mm_list_lock);
 355         uctx->pd_in_use = false;
 356         mutex_unlock(&uctx->mm_list_lock);
 357 }
 358
 359 struct ib_ucontext *ocrdma_alloc_ucontext(struct ib_device *ibdev,
 360                                           struct ib_udata *udata)
 361 {
 362         int status;
 363         struct ocrdma_ucontext *ctx;
 364         struct ocrdma_alloc_ucontext_resp resp;
 365         struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
 366         struct pci_dev *pdev = dev->nic_info.pdev;
 367         u32 map_len = roundup(sizeof(u32) * 2048, PAGE_SIZE);
 368
 369         if (!udata)
 370                 return ERR_PTR(-EFAULT);
 371         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 372         if (!ctx)
 373                 return ERR_PTR(-ENOMEM);
 374         INIT_LIST_HEAD(&ctx->mm_head);
 375         mutex_init(&ctx->mm_list_lock);
 376
 377         ctx->ah_tbl.va = dma_alloc_coherent(&pdev->dev, map_len,
 378                                             &ctx->ah_tbl.pa, GFP_KERNEL);
 379         if (!ctx->ah_tbl.va) {
 380                 kfree(ctx);
 381                 return ERR_PTR(-ENOMEM);
 382         }
 383         memset(ctx->ah_tbl.va, 0, map_len);
 384         ctx->ah_tbl.len = map_len;
 385
 386         memset(&resp, 0, sizeof(resp));
 387         resp.ah_tbl_len = ctx->ah_tbl.len;
 388         resp.ah_tbl_page = ctx->ah_tbl.pa;
 389
 390         status = ocrdma_add_mmap(ctx, resp.ah_tbl_page, resp.ah_tbl_len);
 391         if (status)
 392                 goto map_err;
 393
 394         status = ocrdma_alloc_ucontext_pd(dev, ctx, udata);
 395         if (status)
 396                 goto pd_err;
 397
 398         resp.dev_id = dev->id;
 399         resp.max_inline_data = dev->attr.max_inline_data;
 400         resp.wqe_size = dev->attr.wqe_size;
 401         resp.rqe_size = dev->attr.rqe_size;
 402         resp.dpp_wqe_size = dev->attr.wqe_size;
 403
 404         memcpy(resp.fw_ver, dev->attr.fw_ver, sizeof(resp.fw_ver));
 405         status = ib_copy_to_udata(udata, &resp, sizeof(resp));
 406         if (status)
 407                 goto cpy_err;
 408         return &ctx->ibucontext;
 409
 410 cpy_err:
 411 pd_err:
 412         ocrdma_del_mmap(ctx, ctx->ah_tbl.pa, ctx->ah_tbl.len);
 413 map_err:
 414         dma_free_coherent(&pdev->dev, ctx->ah_tbl.len, ctx->ah_tbl.va,
 415                           ctx->ah_tbl.pa);
 416         kfree(ctx);
 417         return ERR_PTR(status);
 418 }
 419
 420 int ocrdma_dealloc_ucontext(struct ib_ucontext *ibctx)
 421 {
 422         int status = 0;
 423         struct ocrdma_mm *mm, *tmp;
 424         struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ibctx);
 425         struct ocrdma_dev *dev = get_ocrdma_dev(ibctx->device);
 426         struct pci_dev *pdev = dev->nic_info.pdev;
 427
 428         status = ocrdma_dealloc_ucontext_pd(uctx);
 429
 430         ocrdma_del_mmap(uctx, uctx->ah_tbl.pa, uctx->ah_tbl.len);
 431         dma_free_coherent(&pdev->dev, uctx->ah_tbl.len, uctx->ah_tbl.va,
 432                           uctx->ah_tbl.pa);
 433
 434         list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
 435                 list_del(&mm->entry);
 436                 kfree(mm);
 437         }
 438         kfree(uctx);
 439         return status;
 440 }
 441
 442 int ocrdma_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
 443 {
 444         struct ocrdma_ucontext *ucontext = get_ocrdma_ucontext(context);
 445         struct ocrdma_dev *dev = get_ocrdma_dev(context->device);
 446         unsigned long vm_page = vma->vm_pgoff << PAGE_SHIFT;
 447         u64 unmapped_db = (u64) dev->nic_info.unmapped_db;
 448         unsigned long len = (vma->vm_end - vma->vm_start);
 449         int status = 0;
 450         bool found;
 451
 452         if (vma->vm_start & (PAGE_SIZE - 1))
 453                 return -EINVAL;
 454         found = ocrdma_search_mmap(ucontext, vma->vm_pgoff << PAGE_SHIFT, len);
 455         if (!found)
 456                 return -EINVAL;
 457
 458         if ((vm_page >= unmapped_db) && (vm_page <= (unmapped_db +
 459                 dev->nic_info.db_total_size)) &&
 460                 (len <= dev->nic_info.db_page_size)) {
 461                 if (vma->vm_flags & VM_READ)
 462                         return -EPERM;
 463
 464                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 465                 status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
 466                                             len, vma->vm_page_prot);
 467         } else if (dev->nic_info.dpp_unmapped_len &&
 468                 (vm_page >= (u64) dev->nic_info.dpp_unmapped_addr) &&
 469                 (vm_page <= (u64) (dev->nic_info.dpp_unmapped_addr +
 470                         dev->nic_info.dpp_unmapped_len)) &&
 471                 (len <= dev->nic_info.dpp_unmapped_len)) {
 472                 if (vma->vm_flags & VM_READ)
 473                         return -EPERM;
 474
 475                 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
 476                 status = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
 477                                             len, vma->vm_page_prot);
 478         } else {
 479                 status = remap_pfn_range(vma, vma->vm_start,
 480                                          vma->vm_pgoff, len, vma->vm_page_prot);
 481         }
 482         return status;
 483 }
 484
 485 static int ocrdma_copy_pd_uresp(struct ocrdma_dev *dev, struct ocrdma_pd *pd,
 486                                 struct ib_ucontext *ib_ctx,
 487                                 struct ib_udata *udata)
 488 {
 489         int status;
 490         u64 db_page_addr;
 491         u64 dpp_page_addr = 0;
 492         u32 db_page_size;
 493         struct ocrdma_alloc_pd_uresp rsp;
 494         struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ib_ctx);
 495
 496         memset(&rsp, 0, sizeof(rsp));
 497         rsp.id = pd->id;
 498         rsp.dpp_enabled = pd->dpp_enabled;
 499         db_page_addr = ocrdma_get_db_addr(dev, pd->id);
 500         db_page_size = dev->nic_info.db_page_size;
 501
 502         status = ocrdma_add_mmap(uctx, db_page_addr, db_page_size);
 503         if (status)
 504                 return status;
 505
 506         if (pd->dpp_enabled) {
 507                 dpp_page_addr = dev->nic_info.dpp_unmapped_addr +
 508                                 (pd->id * PAGE_SIZE);
 509                 status = ocrdma_add_mmap(uctx, dpp_page_addr,
 510                                  PAGE_SIZE);
 511                 if (status)
 512                         goto dpp_map_err;
 513                 rsp.dpp_page_addr_hi = upper_32_bits(dpp_page_addr);
 514                 rsp.dpp_page_addr_lo = dpp_page_addr;
 515         }
 516
 517         status = ib_copy_to_udata(udata, &rsp, sizeof(rsp));
 518         if (status)
 519                 goto ucopy_err;
 520
 521         pd->uctx = uctx;
 522         return 0;
 523
 524 ucopy_err:
 525         if (pd->dpp_enabled)
 526                 ocrdma_del_mmap(pd->uctx, dpp_page_addr, PAGE_SIZE);
 527 dpp_map_err:
 528         ocrdma_del_mmap(pd->uctx, db_page_addr, db_page_size);
 529         return status;
 530 }
 531
 532 struct ib_pd *ocrdma_alloc_pd(struct ib_device *ibdev,
 533                               struct ib_ucontext *context,
 534                               struct ib_udata *udata)
 535 {
 536         struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
 537         struct ocrdma_pd *pd;
 538         struct ocrdma_ucontext *uctx = NULL;
 539         int status;
 540         u8 is_uctx_pd = false;
 541
 542         if (udata && context) {
 543                 uctx = get_ocrdma_ucontext(context);
 544                 pd = ocrdma_get_ucontext_pd(uctx);
 545                 if (pd) {
 546                         is_uctx_pd = true;
 547                         goto pd_mapping;
 548                 }
 549         }
 550
 551         pd = _ocrdma_alloc_pd(dev, uctx, udata);
 552         if (IS_ERR(pd)) {
 553                 status = PTR_ERR(pd);
 554                 goto exit;
 555         }
 556
 557 pd_mapping:
 558         if (udata && context) {
 559                 status = ocrdma_copy_pd_uresp(dev, pd, context, udata);
 560                 if (status)
 561                         goto err;
 562         }
 563         return &pd->ibpd;
 564
 565 err:
 566         if (is_uctx_pd) {
 567                 ocrdma_release_ucontext_pd(uctx);
 568         } else {
 569                 status = ocrdma_mbx_dealloc_pd(dev, pd);
 570                 kfree(pd);
 571         }
 572 exit:
 573         return ERR_PTR(status);
 574 }
 575
 576 int ocrdma_dealloc_pd(struct ib_pd *ibpd)
 577 {
 578         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
 579         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
 580         struct ocrdma_ucontext *uctx = NULL;
 581         int status = 0;
 582         u64 usr_db;
 583
 584         uctx = pd->uctx;
 585         if (uctx) {
 586                 u64 dpp_db = dev->nic_info.dpp_unmapped_addr +
 587                         (pd->id * PAGE_SIZE);
 588                 if (pd->dpp_enabled)
 589                         ocrdma_del_mmap(pd->uctx, dpp_db, PAGE_SIZE);
 590                 usr_db = ocrdma_get_db_addr(dev, pd->id);
 591                 ocrdma_del_mmap(pd->uctx, usr_db, dev->nic_info.db_page_size);
 592
 593                 if (is_ucontext_pd(uctx, pd)) {
 594                         ocrdma_release_ucontext_pd(uctx);
 595                         return status;
 596                 }
 597         }
 598         status = _ocrdma_dealloc_pd(dev, pd);
 599         return status;
 600 }
 601
 602 static int ocrdma_alloc_lkey(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
 603                             u32 pdid, int acc, u32 num_pbls, u32 addr_check)
 604 {
 605         int status;
 606
 607         mr->hwmr.fr_mr = 0;
 608         mr->hwmr.local_rd = 1;
 609         mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
 610         mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
 611         mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
 612         mr->hwmr.mw_bind = (acc & IB_ACCESS_MW_BIND) ? 1 : 0;
 613         mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
 614         mr->hwmr.num_pbls = num_pbls;
 615
 616         status = ocrdma_mbx_alloc_lkey(dev, &mr->hwmr, pdid, addr_check);
 617         if (status)
 618                 return status;
 619
 620         mr->ibmr.lkey = mr->hwmr.lkey;
 621         if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
 622                 mr->ibmr.rkey = mr->hwmr.lkey;
 623         return 0;
 624 }
 625
 626 struct ib_mr *ocrdma_get_dma_mr(struct ib_pd *ibpd, int acc)
 627 {
 628         int status;
 629         struct ocrdma_mr *mr;
 630         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
 631         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
 632
 633         if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE)) {
 634                 pr_err("%s err, invalid access rights\n", __func__);
 635                 return ERR_PTR(-EINVAL);
 636         }
 637
 638         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 639         if (!mr)
 640                 return ERR_PTR(-ENOMEM);
 641
 642         status = ocrdma_alloc_lkey(dev, mr, pd->id, acc, 0,
 643                                    OCRDMA_ADDR_CHECK_DISABLE);
 644         if (status) {
 645                 kfree(mr);
 646                 return ERR_PTR(status);
 647         }
 648
 649         return &mr->ibmr;
 650 }
 651
 652 static void ocrdma_free_mr_pbl_tbl(struct ocrdma_dev *dev,
 653                                    struct ocrdma_hw_mr *mr)
 654 {
 655         struct pci_dev *pdev = dev->nic_info.pdev;
 656         int i = 0;
 657
 658         if (mr->pbl_table) {
 659                 for (i = 0; i < mr->num_pbls; i++) {
 660                         if (!mr->pbl_table[i].va)
 661                                 continue;
 662                         dma_free_coherent(&pdev->dev, mr->pbl_size,
 663                                           mr->pbl_table[i].va,
 664                                           mr->pbl_table[i].pa);
 665                 }
 666                 kfree(mr->pbl_table);
 667                 mr->pbl_table = NULL;
 668         }
 669 }
 670
 671 static int ocrdma_get_pbl_info(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
 672                               u32 num_pbes)
 673 {
 674         u32 num_pbls = 0;
 675         u32 idx = 0;
 676         int status = 0;
 677         u32 pbl_size;
 678
 679         do {
 680                 pbl_size = OCRDMA_MIN_HPAGE_SIZE * (1 << idx);
 681                 if (pbl_size > MAX_OCRDMA_PBL_SIZE) {
 682                         status = -EFAULT;
 683                         break;
 684                 }
 685                 num_pbls = roundup(num_pbes, (pbl_size / sizeof(u64)));
 686                 num_pbls = num_pbls / (pbl_size / sizeof(u64));
 687                 idx++;
 688         } while (num_pbls >= dev->attr.max_num_mr_pbl);
 689
 690         mr->hwmr.num_pbes = num_pbes;
 691         mr->hwmr.num_pbls = num_pbls;
 692         mr->hwmr.pbl_size = pbl_size;
 693         return status;
 694 }
 695
 696 static int ocrdma_build_pbl_tbl(struct ocrdma_dev *dev, struct ocrdma_hw_mr *mr)
 697 {
 698         int status = 0;
 699         int i;
 700         u32 dma_len = mr->pbl_size;
 701         struct pci_dev *pdev = dev->nic_info.pdev;
 702         void *va;
 703         dma_addr_t pa;
 704
 705         mr->pbl_table = kzalloc(sizeof(struct ocrdma_pbl) *
 706                                 mr->num_pbls, GFP_KERNEL);
 707
 708         if (!mr->pbl_table)
 709                 return -ENOMEM;
 710
 711         for (i = 0; i < mr->num_pbls; i++) {
 712                 va = dma_alloc_coherent(&pdev->dev, dma_len, &pa, GFP_KERNEL);
 713                 if (!va) {
 714                         ocrdma_free_mr_pbl_tbl(dev, mr);
 715                         status = -ENOMEM;
 716                         break;
 717                 }
 718                 memset(va, 0, dma_len);
 719                 mr->pbl_table[i].va = va;
 720                 mr->pbl_table[i].pa = pa;
 721         }
 722         return status;
 723 }
 724
 725 static void build_user_pbes(struct ocrdma_dev *dev, struct ocrdma_mr *mr,
 726                             u32 num_pbes)
 727 {
 728         struct ocrdma_pbe *pbe;
 729         struct ib_umem_chunk *chunk;
 730         struct ocrdma_pbl *pbl_tbl = mr->hwmr.pbl_table;
 731         struct ib_umem *umem = mr->umem;
 732         int i, shift, pg_cnt, pages, pbe_cnt, total_num_pbes = 0;
 733
 734         if (!mr->hwmr.num_pbes)
 735                 return;
 736
 737         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
 738         pbe_cnt = 0;
 739
 740         shift = ilog2(umem->page_size);
 741
 742         list_for_each_entry(chunk, &umem->chunk_list, list) {
 743                 /* get all the dma regions from the chunk. */
 744                 for (i = 0; i < chunk->nmap; i++) {
 745                         pages = sg_dma_len(&chunk->page_list[i]) >> shift;
 746                         for (pg_cnt = 0; pg_cnt < pages; pg_cnt++) {
 747                                 /* store the page address in pbe */
 748                                 pbe->pa_lo =
 749                                     cpu_to_le32(sg_dma_address
 750                                                 (&chunk->page_list[i]) +
 751                                                 (umem->page_size * pg_cnt));
 752                                 pbe->pa_hi =
 753                                     cpu_to_le32(upper_32_bits
 754                                                 ((sg_dma_address
 755                                                   (&chunk->page_list[i]) +
 756                                                   umem->page_size * pg_cnt)));
 757                                 pbe_cnt += 1;
 758                                 total_num_pbes += 1;
 759                                 pbe++;
 760
 761                                 /* if done building pbes, issue the mbx cmd. */
 762                                 if (total_num_pbes == num_pbes)
 763                                         return;
 764
 765                                 /* if the given pbl is full storing the pbes,
 766                                  * move to next pbl.
 767                                  */
 768                                 if (pbe_cnt ==
 769                                         (mr->hwmr.pbl_size / sizeof(u64))) {
 770                                         pbl_tbl++;
 771                                         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
 772                                         pbe_cnt = 0;
 773                                 }
 774                         }
 775                 }
 776         }
 777 }
 778
 779 struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
 780                                  u64 usr_addr, int acc, struct ib_udata *udata)
 781 {
 782         int status = -ENOMEM;
 783         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
 784         struct ocrdma_mr *mr;
 785         struct ocrdma_pd *pd;
 786         u32 num_pbes;
 787
 788         pd = get_ocrdma_pd(ibpd);
 789
 790         if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE))
 791                 return ERR_PTR(-EINVAL);
 792
 793         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 794         if (!mr)
 795                 return ERR_PTR(status);
 796         mr->umem = ib_umem_get(ibpd->uobject->context, start, len, acc, 0);
 797         if (IS_ERR(mr->umem)) {
 798                 status = -EFAULT;
 799                 goto umem_err;
 800         }
 801         num_pbes = ib_umem_page_count(mr->umem);
 802         status = ocrdma_get_pbl_info(dev, mr, num_pbes);
 803         if (status)
 804                 goto umem_err;
 805
 806         mr->hwmr.pbe_size = mr->umem->page_size;
 807         mr->hwmr.fbo = mr->umem->offset;
 808         mr->hwmr.va = usr_addr;
 809         mr->hwmr.len = len;
 810         mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
 811         mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
 812         mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
 813         mr->hwmr.local_rd = 1;
 814         mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
 815         status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
 816         if (status)
 817                 goto umem_err;
 818         build_user_pbes(dev, mr, num_pbes);
 819         status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, acc);
 820         if (status)
 821                 goto mbx_err;
 822         mr->ibmr.lkey = mr->hwmr.lkey;
 823         if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
 824                 mr->ibmr.rkey = mr->hwmr.lkey;
 825
 826         return &mr->ibmr;
 827
 828 mbx_err:
 829         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
 830 umem_err:
 831         kfree(mr);
 832         return ERR_PTR(status);
 833 }
 834
 835 int ocrdma_dereg_mr(struct ib_mr *ib_mr)
 836 {
 837         struct ocrdma_mr *mr = get_ocrdma_mr(ib_mr);
 838         struct ocrdma_dev *dev = get_ocrdma_dev(ib_mr->device);
 839         int status;
 840
 841         status = ocrdma_mbx_dealloc_lkey(dev, mr->hwmr.fr_mr, mr->hwmr.lkey);
 842
 843         if (mr->hwmr.fr_mr == 0)
 844                 ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
 845
 846         /* it could be user registered memory. */
 847         if (mr->umem)
 848                 ib_umem_release(mr->umem);
 849         kfree(mr);
 850         return status;
 851 }
 852
 853 static int ocrdma_copy_cq_uresp(struct ocrdma_dev *dev, struct ocrdma_cq *cq,
 854                                 struct ib_udata *udata,
 855                                 struct ib_ucontext *ib_ctx)
 856 {
 857         int status;
 858         struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ib_ctx);
 859         struct ocrdma_create_cq_uresp uresp;
 860
 861         memset(&uresp, 0, sizeof(uresp));
 862         uresp.cq_id = cq->id;
 863         uresp.page_size = PAGE_ALIGN(cq->len);
 864         uresp.num_pages = 1;
 865         uresp.max_hw_cqe = cq->max_hw_cqe;
 866         uresp.page_addr[0] = cq->pa;
 867         uresp.db_page_addr =  ocrdma_get_db_addr(dev, uctx->cntxt_pd->id);
 868         uresp.db_page_size = dev->nic_info.db_page_size;
 869         uresp.phase_change = cq->phase_change ? 1 : 0;
 870         status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
 871         if (status) {
 872                 pr_err("%s(%d) copy error cqid=0x%x.\n",
 873                        __func__, dev->id, cq->id);
 874                 goto err;
 875         }
 876         status = ocrdma_add_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
 877         if (status)
 878                 goto err;
 879         status = ocrdma_add_mmap(uctx, uresp.page_addr[0], uresp.page_size);
 880         if (status) {
 881                 ocrdma_del_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
 882                 goto err;
 883         }
 884         cq->ucontext = uctx;
 885 err:
 886         return status;
 887 }
 888
 889 struct ib_cq *ocrdma_create_cq(struct ib_device *ibdev, int entries, int vector,
 890                                struct ib_ucontext *ib_ctx,
 891                                struct ib_udata *udata)
 892 {
 893         struct ocrdma_cq *cq;
 894         struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
 895         struct ocrdma_ucontext *uctx = NULL;
 896         u16 pd_id = 0;
 897         int status;
 898         struct ocrdma_create_cq_ureq ureq;
 899
 900         if (udata) {
 901                 if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
 902                         return ERR_PTR(-EFAULT);
 903         } else
 904                 ureq.dpp_cq = 0;
 905         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 906         if (!cq)
 907                 return ERR_PTR(-ENOMEM);
 908
 909         spin_lock_init(&cq->cq_lock);
 910         spin_lock_init(&cq->comp_handler_lock);
 911         INIT_LIST_HEAD(&cq->sq_head);
 912         INIT_LIST_HEAD(&cq->rq_head);
 913
 914         if (ib_ctx) {
 915                 uctx = get_ocrdma_ucontext(ib_ctx);
 916                 pd_id = uctx->cntxt_pd->id;
 917         }
 918
 919         status = ocrdma_mbx_create_cq(dev, cq, entries, ureq.dpp_cq, pd_id);
 920         if (status) {
 921                 kfree(cq);
 922                 return ERR_PTR(status);
 923         }
 924         if (ib_ctx) {
 925                 status = ocrdma_copy_cq_uresp(dev, cq, udata, ib_ctx);
 926                 if (status)
 927                         goto ctx_err;
 928         }
 929         cq->phase = OCRDMA_CQE_VALID;
 930         cq->arm_needed = true;
 931         dev->cq_tbl[cq->id] = cq;
 932
 933         return &cq->ibcq;
 934
 935 ctx_err:
 936         ocrdma_mbx_destroy_cq(dev, cq);
 937         kfree(cq);
 938         return ERR_PTR(status);
 939 }
 940
 941 int ocrdma_resize_cq(struct ib_cq *ibcq, int new_cnt,
 942                      struct ib_udata *udata)
 943 {
 944         int status = 0;
 945         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
 946
 947         if (new_cnt < 1 || new_cnt > cq->max_hw_cqe) {
 948                 status = -EINVAL;
 949                 return status;
 950         }
 951         ibcq->cqe = new_cnt;
 952         return status;
 953 }
 954
 955 int ocrdma_destroy_cq(struct ib_cq *ibcq)
 956 {
 957         int status;
 958         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
 959         struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
 960         int pdid = 0;
 961
 962         status = ocrdma_mbx_destroy_cq(dev, cq);
 963
 964         if (cq->ucontext) {
 965                 pdid = cq->ucontext->cntxt_pd->id;
 966                 ocrdma_del_mmap(cq->ucontext, (u64) cq->pa,
 967                                 PAGE_ALIGN(cq->len));
 968                 ocrdma_del_mmap(cq->ucontext,
 969                                 ocrdma_get_db_addr(dev, pdid),
 970                                 dev->nic_info.db_page_size);
 971         }
 972         dev->cq_tbl[cq->id] = NULL;
 973
 974         kfree(cq);
 975         return status;
 976 }
 977
 978 static int ocrdma_add_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
 979 {
 980         int status = -EINVAL;
 981
 982         if (qp->id < OCRDMA_MAX_QP && dev->qp_tbl[qp->id] == NULL) {
 983                 dev->qp_tbl[qp->id] = qp;
 984                 status = 0;
 985         }
 986         return status;
 987 }
 988
 989 static void ocrdma_del_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
 990 {
 991         dev->qp_tbl[qp->id] = NULL;
 992 }
 993
 994 static int ocrdma_check_qp_params(struct ib_pd *ibpd, struct ocrdma_dev *dev,
 995                                   struct ib_qp_init_attr *attrs)
 996 {
 997         if ((attrs->qp_type != IB_QPT_GSI) &&
 998             (attrs->qp_type != IB_QPT_RC) &&
 999             (attrs->qp_type != IB_QPT_UC) &&
1000             (attrs->qp_type != IB_QPT_UD)) {
1001                 pr_err("%s(%d) unsupported qp type=0x%x requested\n",
1002                        __func__, dev->id, attrs->qp_type);
1003                 return -EINVAL;
1004         }
1005         /* Skip the check for QP1 to support CM size of 128 */
1006         if ((attrs->qp_type != IB_QPT_GSI) &&
1007             (attrs->cap.max_send_wr > dev->attr.max_wqe)) {
1008                 pr_err("%s(%d) unsupported send_wr=0x%x requested\n",
1009                        __func__, dev->id, attrs->cap.max_send_wr);
1010                 pr_err("%s(%d) supported send_wr=0x%x\n",
1011                        __func__, dev->id, dev->attr.max_wqe);
1012                 return -EINVAL;
1013         }
1014         if (!attrs->srq && (attrs->cap.max_recv_wr > dev->attr.max_rqe)) {
1015                 pr_err("%s(%d) unsupported recv_wr=0x%x requested\n",
1016                        __func__, dev->id, attrs->cap.max_recv_wr);
1017                 pr_err("%s(%d) supported recv_wr=0x%x\n",
1018                        __func__, dev->id, dev->attr.max_rqe);
1019                 return -EINVAL;
1020         }
1021         if (attrs->cap.max_inline_data > dev->attr.max_inline_data) {
1022                 pr_err("%s(%d) unsupported inline data size=0x%x requested\n",
1023                        __func__, dev->id, attrs->cap.max_inline_data);
1024                 pr_err("%s(%d) supported inline data size=0x%x\n",
1025                        __func__, dev->id, dev->attr.max_inline_data);
1026                 return -EINVAL;
1027         }
1028         if (attrs->cap.max_send_sge > dev->attr.max_send_sge) {
1029                 pr_err("%s(%d) unsupported send_sge=0x%x requested\n",
1030                        __func__, dev->id, attrs->cap.max_send_sge);
1031                 pr_err("%s(%d) supported send_sge=0x%x\n",
1032                        __func__, dev->id, dev->attr.max_send_sge);
1033                 return -EINVAL;
1034         }
1035         if (attrs->cap.max_recv_sge > dev->attr.max_recv_sge) {
1036                 pr_err("%s(%d) unsupported recv_sge=0x%x requested\n",
1037                        __func__, dev->id, attrs->cap.max_recv_sge);
1038                 pr_err("%s(%d) supported recv_sge=0x%x\n",
1039                        __func__, dev->id, dev->attr.max_recv_sge);
1040                 return -EINVAL;
1041         }
1042         /* unprivileged user space cannot create special QP */
1043         if (ibpd->uobject && attrs->qp_type == IB_QPT_GSI) {
1044                 pr_err
1045                     ("%s(%d) Userspace can't create special QPs of type=0x%x\n",
1046                      __func__, dev->id, attrs->qp_type);
1047                 return -EINVAL;
1048         }
1049         /* allow creating only one GSI type of QP */
1050         if (attrs->qp_type == IB_QPT_GSI && dev->gsi_qp_created) {
1051                 pr_err("%s(%d) GSI special QPs already created.\n",
1052                        __func__, dev->id);
1053                 return -EINVAL;
1054         }
1055         /* verify consumer QPs are not trying to use GSI QP's CQ */
1056         if ((attrs->qp_type != IB_QPT_GSI) && (dev->gsi_qp_created)) {
1057                 if ((dev->gsi_sqcq == get_ocrdma_cq(attrs->send_cq)) ||
1058                         (dev->gsi_rqcq == get_ocrdma_cq(attrs->recv_cq))) {
1059                         pr_err("%s(%d) Consumer QP cannot use GSI CQs.\n",
1060                                 __func__, dev->id);
1061                         return -EINVAL;
1062                 }
1063         }
1064         return 0;
1065 }
1066
1067 static int ocrdma_copy_qp_uresp(struct ocrdma_qp *qp,
1068                                 struct ib_udata *udata, int dpp_offset,
1069                                 int dpp_credit_lmt, int srq)
1070 {
1071         int status = 0;
1072         u64 usr_db;
1073         struct ocrdma_create_qp_uresp uresp;
1074         struct ocrdma_dev *dev = qp->dev;
1075         struct ocrdma_pd *pd = qp->pd;
1076
1077         memset(&uresp, 0, sizeof(uresp));
1078         usr_db = dev->nic_info.unmapped_db +
1079                         (pd->id * dev->nic_info.db_page_size);
1080         uresp.qp_id = qp->id;
1081         uresp.sq_dbid = qp->sq.dbid;
1082         uresp.num_sq_pages = 1;
1083         uresp.sq_page_size = PAGE_ALIGN(qp->sq.len);
1084         uresp.sq_page_addr[0] = qp->sq.pa;
1085         uresp.num_wqe_allocated = qp->sq.max_cnt;
1086         if (!srq) {
1087                 uresp.rq_dbid = qp->rq.dbid;
1088                 uresp.num_rq_pages = 1;
1089                 uresp.rq_page_size = PAGE_ALIGN(qp->rq.len);
1090                 uresp.rq_page_addr[0] = qp->rq.pa;
1091                 uresp.num_rqe_allocated = qp->rq.max_cnt;
1092         }
1093         uresp.db_page_addr = usr_db;
1094         uresp.db_page_size = dev->nic_info.db_page_size;
1095         if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
1096                 uresp.db_sq_offset = OCRDMA_DB_GEN2_SQ_OFFSET;
1097                 uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
1098                 uresp.db_shift = 24;
1099         } else {
1100                 uresp.db_sq_offset = OCRDMA_DB_SQ_OFFSET;
1101                 uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET;
1102                 uresp.db_shift = 16;
1103         }
1104
1105         if (qp->dpp_enabled) {
1106                 uresp.dpp_credit = dpp_credit_lmt;
1107                 uresp.dpp_offset = dpp_offset;
1108         }
1109         status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
1110         if (status) {
1111                 pr_err("%s(%d) user copy error.\n", __func__, dev->id);
1112                 goto err;
1113         }
1114         status = ocrdma_add_mmap(pd->uctx, uresp.sq_page_addr[0],
1115                                  uresp.sq_page_size);
1116         if (status)
1117                 goto err;
1118
1119         if (!srq) {
1120                 status = ocrdma_add_mmap(pd->uctx, uresp.rq_page_addr[0],
1121                                          uresp.rq_page_size);
1122                 if (status)
1123                         goto rq_map_err;
1124         }
1125         return status;
1126 rq_map_err:
1127         ocrdma_del_mmap(pd->uctx, uresp.sq_page_addr[0], uresp.sq_page_size);
1128 err:
1129         return status;
1130 }
1131
1132 static void ocrdma_set_qp_db(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
1133                              struct ocrdma_pd *pd)
1134 {
1135         if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
1136                 qp->sq_db = dev->nic_info.db +
1137                         (pd->id * dev->nic_info.db_page_size) +
1138                         OCRDMA_DB_GEN2_SQ_OFFSET;
1139                 qp->rq_db = dev->nic_info.db +
1140                         (pd->id * dev->nic_info.db_page_size) +
1141                         OCRDMA_DB_GEN2_RQ_OFFSET;
1142         } else {
1143                 qp->sq_db = dev->nic_info.db +
1144                         (pd->id * dev->nic_info.db_page_size) +
1145                         OCRDMA_DB_SQ_OFFSET;
1146                 qp->rq_db = dev->nic_info.db +
1147                         (pd->id * dev->nic_info.db_page_size) +
1148                         OCRDMA_DB_RQ_OFFSET;
1149         }
1150 }
1151
1152 static int ocrdma_alloc_wr_id_tbl(struct ocrdma_qp *qp)
1153 {
1154         qp->wqe_wr_id_tbl =
1155             kzalloc(sizeof(*(qp->wqe_wr_id_tbl)) * qp->sq.max_cnt,
1156                     GFP_KERNEL);
1157         if (qp->wqe_wr_id_tbl == NULL)
1158                 return -ENOMEM;
1159         qp->rqe_wr_id_tbl =
1160             kzalloc(sizeof(u64) * qp->rq.max_cnt, GFP_KERNEL);
1161         if (qp->rqe_wr_id_tbl == NULL)
1162                 return -ENOMEM;
1163
1164         return 0;
1165 }
1166
1167 static void ocrdma_set_qp_init_params(struct ocrdma_qp *qp,
1168                                       struct ocrdma_pd *pd,
1169                                       struct ib_qp_init_attr *attrs)
1170 {
1171         qp->pd = pd;
1172         spin_lock_init(&qp->q_lock);
1173         INIT_LIST_HEAD(&qp->sq_entry);
1174         INIT_LIST_HEAD(&qp->rq_entry);
1175
1176         qp->qp_type = attrs->qp_type;
1177         qp->cap_flags = OCRDMA_QP_INB_RD | OCRDMA_QP_INB_WR;
1178         qp->max_inline_data = attrs->cap.max_inline_data;
1179         qp->sq.max_sges = attrs->cap.max_send_sge;
1180         qp->rq.max_sges = attrs->cap.max_recv_sge;
1181         qp->state = OCRDMA_QPS_RST;
1182         qp->signaled = (attrs->sq_sig_type == IB_SIGNAL_ALL_WR) ? true : false;
1183 }
1184
1185
1186 static void ocrdma_store_gsi_qp_cq(struct ocrdma_dev *dev,
1187                                    struct ib_qp_init_attr *attrs)
1188 {
1189         if (attrs->qp_type == IB_QPT_GSI) {
1190                 dev->gsi_qp_created = 1;
1191                 dev->gsi_sqcq = get_ocrdma_cq(attrs->send_cq);
1192                 dev->gsi_rqcq = get_ocrdma_cq(attrs->recv_cq);
1193         }
1194 }
1195
1196 struct ib_qp *ocrdma_create_qp(struct ib_pd *ibpd,
1197                                struct ib_qp_init_attr *attrs,
1198                                struct ib_udata *udata)
1199 {
1200         int status;
1201         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
1202         struct ocrdma_qp *qp;
1203         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
1204         struct ocrdma_create_qp_ureq ureq;
1205         u16 dpp_credit_lmt, dpp_offset;
1206
1207         status = ocrdma_check_qp_params(ibpd, dev, attrs);
1208         if (status)
1209                 goto gen_err;
1210
1211         memset(&ureq, 0, sizeof(ureq));
1212         if (udata) {
1213                 if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
1214                         return ERR_PTR(-EFAULT);
1215         }
1216         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
1217         if (!qp) {
1218                 status = -ENOMEM;
1219                 goto gen_err;
1220         }
1221         qp->dev = dev;
1222         ocrdma_set_qp_init_params(qp, pd, attrs);
1223         if (udata == NULL)
1224                 qp->cap_flags |= (OCRDMA_QP_MW_BIND | OCRDMA_QP_LKEY0 |
1225                                         OCRDMA_QP_FAST_REG);
1226
1227         mutex_lock(&dev->dev_lock);
1228         status = ocrdma_mbx_create_qp(qp, attrs, ureq.enable_dpp_cq,
1229                                         ureq.dpp_cq_id,
1230                                         &dpp_offset, &dpp_credit_lmt);
1231         if (status)
1232                 goto mbx_err;
1233
1234         /* user space QP's wr_id table are managed in library */
1235         if (udata == NULL) {
1236                 status = ocrdma_alloc_wr_id_tbl(qp);
1237                 if (status)
1238                         goto map_err;
1239         }
1240
1241         status = ocrdma_add_qpn_map(dev, qp);
1242         if (status)
1243                 goto map_err;
1244         ocrdma_set_qp_db(dev, qp, pd);
1245         if (udata) {
1246                 status = ocrdma_copy_qp_uresp(qp, udata, dpp_offset,
1247                                               dpp_credit_lmt,
1248                                               (attrs->srq != NULL));
1249                 if (status)
1250                         goto cpy_err;
1251         }
1252         ocrdma_store_gsi_qp_cq(dev, attrs);
1253         qp->ibqp.qp_num = qp->id;
1254         mutex_unlock(&dev->dev_lock);
1255         return &qp->ibqp;
1256
1257 cpy_err:
1258         ocrdma_del_qpn_map(dev, qp);
1259 map_err:
1260         ocrdma_mbx_destroy_qp(dev, qp);
1261 mbx_err:
1262         mutex_unlock(&dev->dev_lock);
1263         kfree(qp->wqe_wr_id_tbl);
1264         kfree(qp->rqe_wr_id_tbl);
1265         kfree(qp);
1266         pr_err("%s(%d) error=%d\n", __func__, dev->id, status);
1267 gen_err:
1268         return ERR_PTR(status);
1269 }
1270
1271
1272 static void ocrdma_flush_rq_db(struct ocrdma_qp *qp)
1273 {
1274         if (qp->db_cache) {
1275                 u32 val = qp->rq.dbid | (qp->db_cache <<
1276                                 ocrdma_get_num_posted_shift(qp));
1277                 iowrite32(val, qp->rq_db);
1278                 qp->db_cache = 0;
1279         }
1280 }
1281
1282 int _ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1283                       int attr_mask)
1284 {
1285         int status = 0;
1286         struct ocrdma_qp *qp;
1287         struct ocrdma_dev *dev;
1288         enum ib_qp_state old_qps;
1289
1290         qp = get_ocrdma_qp(ibqp);
1291         dev = qp->dev;
1292         if (attr_mask & IB_QP_STATE)
1293                 status = ocrdma_qp_state_change(qp, attr->qp_state, &old_qps);
1294         /* if new and previous states are same hw doesn't need to
1295          * know about it.
1296          */
1297         if (status < 0)
1298                 return status;
1299         status = ocrdma_mbx_modify_qp(dev, qp, attr, attr_mask, old_qps);
1300         if (!status && attr_mask & IB_QP_STATE && attr->qp_state == IB_QPS_RTR)
1301                 ocrdma_flush_rq_db(qp);
1302
1303         return status;
1304 }
1305
1306 int ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1307                      int attr_mask, struct ib_udata *udata)
1308 {
1309         unsigned long flags;
1310         int status = -EINVAL;
1311         struct ocrdma_qp *qp;
1312         struct ocrdma_dev *dev;
1313         enum ib_qp_state old_qps, new_qps;
1314
1315         qp = get_ocrdma_qp(ibqp);
1316         dev = qp->dev;
1317
1318         /* syncronize with multiple context trying to change, retrive qps */
1319         mutex_lock(&dev->dev_lock);
1320         /* syncronize with wqe, rqe posting and cqe processing contexts */
1321         spin_lock_irqsave(&qp->q_lock, flags);
1322         old_qps = get_ibqp_state(qp->state);
1323         if (attr_mask & IB_QP_STATE)
1324                 new_qps = attr->qp_state;
1325         else
1326                 new_qps = old_qps;
1327         spin_unlock_irqrestore(&qp->q_lock, flags);
1328
1329         if (!ib_modify_qp_is_ok(old_qps, new_qps, ibqp->qp_type, attr_mask)) {
1330                 pr_err("%s(%d) invalid attribute mask=0x%x specified for\n"
1331                        "qpn=0x%x of type=0x%x old_qps=0x%x, new_qps=0x%x\n",
1332                        __func__, dev->id, attr_mask, qp->id, ibqp->qp_type,
1333                        old_qps, new_qps);
1334                 goto param_err;
1335         }
1336
1337         status = _ocrdma_modify_qp(ibqp, attr, attr_mask);
1338         if (status > 0)
1339                 status = 0;
1340 param_err:
1341         mutex_unlock(&dev->dev_lock);
1342         return status;
1343 }
1344
1345 static enum ib_mtu ocrdma_mtu_int_to_enum(u16 mtu)
1346 {
1347         switch (mtu) {
1348         case 256:
1349                 return IB_MTU_256;
1350         case 512:
1351                 return IB_MTU_512;
1352         case 1024:
1353                 return IB_MTU_1024;
1354         case 2048:
1355                 return IB_MTU_2048;
1356         case 4096:
1357                 return IB_MTU_4096;
1358         default:
1359                 return IB_MTU_1024;
1360         }
1361 }
1362
1363 static int ocrdma_to_ib_qp_acc_flags(int qp_cap_flags)
1364 {
1365         int ib_qp_acc_flags = 0;
1366
1367         if (qp_cap_flags & OCRDMA_QP_INB_WR)
1368                 ib_qp_acc_flags |= IB_ACCESS_REMOTE_WRITE;
1369         if (qp_cap_flags & OCRDMA_QP_INB_RD)
1370                 ib_qp_acc_flags |= IB_ACCESS_LOCAL_WRITE;
1371         return ib_qp_acc_flags;
1372 }
1373
1374 int ocrdma_query_qp(struct ib_qp *ibqp,
1375                     struct ib_qp_attr *qp_attr,
1376                     int attr_mask, struct ib_qp_init_attr *qp_init_attr)
1377 {
1378         int status;
1379         u32 qp_state;
1380         struct ocrdma_qp_params params;
1381         struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
1382         struct ocrdma_dev *dev = qp->dev;
1383
1384         memset(&params, 0, sizeof(params));
1385         mutex_lock(&dev->dev_lock);
1386         status = ocrdma_mbx_query_qp(dev, qp, &params);
1387         mutex_unlock(&dev->dev_lock);
1388         if (status)
1389                 goto mbx_err;
1390         qp_attr->qp_state = get_ibqp_state(IB_QPS_INIT);
1391         qp_attr->cur_qp_state = get_ibqp_state(IB_QPS_INIT);
1392         qp_attr->path_mtu =
1393                 ocrdma_mtu_int_to_enum(params.path_mtu_pkey_indx &
1394                                 OCRDMA_QP_PARAMS_PATH_MTU_MASK) >>
1395                                 OCRDMA_QP_PARAMS_PATH_MTU_SHIFT;
1396         qp_attr->path_mig_state = IB_MIG_MIGRATED;
1397         qp_attr->rq_psn = params.hop_lmt_rq_psn & OCRDMA_QP_PARAMS_RQ_PSN_MASK;
1398         qp_attr->sq_psn = params.tclass_sq_psn & OCRDMA_QP_PARAMS_SQ_PSN_MASK;
1399         qp_attr->dest_qp_num =
1400             params.ack_to_rnr_rtc_dest_qpn & OCRDMA_QP_PARAMS_DEST_QPN_MASK;
1401
1402         qp_attr->qp_access_flags = ocrdma_to_ib_qp_acc_flags(qp->cap_flags);
1403         qp_attr->cap.max_send_wr = qp->sq.max_cnt - 1;
1404         qp_attr->cap.max_recv_wr = qp->rq.max_cnt - 1;
1405         qp_attr->cap.max_send_sge = qp->sq.max_sges;
1406         qp_attr->cap.max_recv_sge = qp->rq.max_sges;
1407         qp_attr->cap.max_inline_data = qp->max_inline_data;
1408         qp_init_attr->cap = qp_attr->cap;
1409         memcpy(&qp_attr->ah_attr.grh.dgid, &params.dgid[0],
1410                sizeof(params.dgid));
1411         qp_attr->ah_attr.grh.flow_label = params.rnt_rc_sl_fl &
1412             OCRDMA_QP_PARAMS_FLOW_LABEL_MASK;
1413         qp_attr->ah_attr.grh.sgid_index = qp->sgid_idx;
1414         qp_attr->ah_attr.grh.hop_limit = (params.hop_lmt_rq_psn &
1415                                           OCRDMA_QP_PARAMS_HOP_LMT_MASK) >>
1416                                                 OCRDMA_QP_PARAMS_HOP_LMT_SHIFT;
1417         qp_attr->ah_attr.grh.traffic_class = (params.tclass_sq_psn &
1418                                               OCRDMA_QP_PARAMS_SQ_PSN_MASK) >>
1419                                                 OCRDMA_QP_PARAMS_TCLASS_SHIFT;
1420
1421         qp_attr->ah_attr.ah_flags = IB_AH_GRH;
1422         qp_attr->ah_attr.port_num = 1;
1423         qp_attr->ah_attr.sl = (params.rnt_rc_sl_fl &
1424                                OCRDMA_QP_PARAMS_SL_MASK) >>
1425                                 OCRDMA_QP_PARAMS_SL_SHIFT;
1426         qp_attr->timeout = (params.ack_to_rnr_rtc_dest_qpn &
1427                             OCRDMA_QP_PARAMS_ACK_TIMEOUT_MASK) >>
1428                                 OCRDMA_QP_PARAMS_ACK_TIMEOUT_SHIFT;
1429         qp_attr->rnr_retry = (params.ack_to_rnr_rtc_dest_qpn &
1430                               OCRDMA_QP_PARAMS_RNR_RETRY_CNT_MASK) >>
1431                                 OCRDMA_QP_PARAMS_RNR_RETRY_CNT_SHIFT;
1432         qp_attr->retry_cnt =
1433             (params.rnt_rc_sl_fl & OCRDMA_QP_PARAMS_RETRY_CNT_MASK) >>
1434                 OCRDMA_QP_PARAMS_RETRY_CNT_SHIFT;
1435         qp_attr->min_rnr_timer = 0;
1436         qp_attr->pkey_index = 0;
1437         qp_attr->port_num = 1;
1438         qp_attr->ah_attr.src_path_bits = 0;
1439         qp_attr->ah_attr.static_rate = 0;
1440         qp_attr->alt_pkey_index = 0;
1441         qp_attr->alt_port_num = 0;
1442         qp_attr->alt_timeout = 0;
1443         memset(&qp_attr->alt_ah_attr, 0, sizeof(qp_attr->alt_ah_attr));
1444         qp_state = (params.max_sge_recv_flags & OCRDMA_QP_PARAMS_STATE_MASK) >>
1445                     OCRDMA_QP_PARAMS_STATE_SHIFT;
1446         qp_attr->sq_draining = (qp_state == OCRDMA_QPS_SQ_DRAINING) ? 1 : 0;
1447         qp_attr->max_dest_rd_atomic =
1448             params.max_ord_ird >> OCRDMA_QP_PARAMS_MAX_ORD_SHIFT;
1449         qp_attr->max_rd_atomic =
1450             params.max_ord_ird & OCRDMA_QP_PARAMS_MAX_IRD_MASK;
1451         qp_attr->en_sqd_async_notify = (params.max_sge_recv_flags &
1452                                 OCRDMA_QP_PARAMS_FLAGS_SQD_ASYNC) ? 1 : 0;
1453 mbx_err:
1454         return status;
1455 }
1456
1457 static void ocrdma_srq_toggle_bit(struct ocrdma_srq *srq, int idx)
1458 {
1459         int i = idx / 32;
1460         unsigned int mask = (1 << (idx % 32));
1461
1462         if (srq->idx_bit_fields[i] & mask)
1463                 srq->idx_bit_fields[i] &= ~mask;
1464         else
1465                 srq->idx_bit_fields[i] |= mask;
1466 }
1467
1468 static int ocrdma_hwq_free_cnt(struct ocrdma_qp_hwq_info *q)
1469 {
1470         return ((q->max_wqe_idx - q->head) + q->tail) % q->max_cnt;
1471 }
1472
1473 static int is_hw_sq_empty(struct ocrdma_qp *qp)
1474 {
1475         return (qp->sq.tail == qp->sq.head);
1476 }
1477
1478 static int is_hw_rq_empty(struct ocrdma_qp *qp)
1479 {
1480         return (qp->rq.tail == qp->rq.head);
1481 }
1482
1483 static void *ocrdma_hwq_head(struct ocrdma_qp_hwq_info *q)
1484 {
1485         return q->va + (q->head * q->entry_size);
1486 }
1487
1488 static void *ocrdma_hwq_head_from_idx(struct ocrdma_qp_hwq_info *q,
1489                                       u32 idx)
1490 {
1491         return q->va + (idx * q->entry_size);
1492 }
1493
1494 static void ocrdma_hwq_inc_head(struct ocrdma_qp_hwq_info *q)
1495 {
1496         q->head = (q->head + 1) & q->max_wqe_idx;
1497 }
1498
1499 static void ocrdma_hwq_inc_tail(struct ocrdma_qp_hwq_info *q)
1500 {
1501         q->tail = (q->tail + 1) & q->max_wqe_idx;
1502 }
1503
1504 /* discard the cqe for a given QP */
1505 static void ocrdma_discard_cqes(struct ocrdma_qp *qp, struct ocrdma_cq *cq)
1506 {
1507         unsigned long cq_flags;
1508         unsigned long flags;
1509         int discard_cnt = 0;
1510         u32 cur_getp, stop_getp;
1511         struct ocrdma_cqe *cqe;
1512         u32 qpn = 0;
1513
1514         spin_lock_irqsave(&cq->cq_lock, cq_flags);
1515
1516         /* traverse through the CQEs in the hw CQ,
1517          * find the matching CQE for a given qp,
1518          * mark the matching one discarded by clearing qpn.
1519          * ring the doorbell in the poll_cq() as
1520          * we don't complete out of order cqe.
1521          */
1522
1523         cur_getp = cq->getp;
1524         /* find upto when do we reap the cq. */
1525         stop_getp = cur_getp;
1526         do {
1527                 if (is_hw_sq_empty(qp) && (!qp->srq && is_hw_rq_empty(qp)))
1528                         break;
1529
1530                 cqe = cq->va + cur_getp;
1531                 /* if (a) done reaping whole hw cq, or
1532                  *    (b) qp_xq becomes empty.
1533                  * then exit
1534                  */
1535                 qpn = cqe->cmn.qpn & OCRDMA_CQE_QPN_MASK;
1536                 /* if previously discarded cqe found, skip that too. */
1537                 /* check for matching qp */
1538                 if (qpn == 0 || qpn != qp->id)
1539                         goto skip_cqe;
1540
1541                 /* mark cqe discarded so that it is not picked up later
1542                  * in the poll_cq().
1543                  */
1544                 discard_cnt += 1;
1545                 cqe->cmn.qpn = 0;
1546                 if (is_cqe_for_sq(cqe)) {
1547                         ocrdma_hwq_inc_tail(&qp->sq);
1548                 } else {
1549                         if (qp->srq) {
1550                                 spin_lock_irqsave(&qp->srq->q_lock, flags);
1551                                 ocrdma_hwq_inc_tail(&qp->srq->rq);
1552                                 ocrdma_srq_toggle_bit(qp->srq, cur_getp);
1553                                 spin_unlock_irqrestore(&qp->srq->q_lock, flags);
1554
1555                         } else {
1556                                 ocrdma_hwq_inc_tail(&qp->rq);
1557                         }
1558                 }
1559 skip_cqe:
1560                 cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
1561         } while (cur_getp != stop_getp);
1562         spin_unlock_irqrestore(&cq->cq_lock, cq_flags);
1563 }
1564
1565 void ocrdma_del_flush_qp(struct ocrdma_qp *qp)
1566 {
1567         int found = false;
1568         unsigned long flags;
1569         struct ocrdma_dev *dev = qp->dev;
1570         /* sync with any active CQ poll */
1571
1572         spin_lock_irqsave(&dev->flush_q_lock, flags);
1573         found = ocrdma_is_qp_in_sq_flushlist(qp->sq_cq, qp);
1574         if (found)
1575                 list_del(&qp->sq_entry);
1576         if (!qp->srq) {
1577                 found = ocrdma_is_qp_in_rq_flushlist(qp->rq_cq, qp);
1578                 if (found)
1579                         list_del(&qp->rq_entry);
1580         }
1581         spin_unlock_irqrestore(&dev->flush_q_lock, flags);
1582 }
1583
1584 int ocrdma_destroy_qp(struct ib_qp *ibqp)
1585 {
1586         int status;
1587         struct ocrdma_pd *pd;
1588         struct ocrdma_qp *qp;
1589         struct ocrdma_dev *dev;
1590         struct ib_qp_attr attrs;
1591         int attr_mask = IB_QP_STATE;
1592         unsigned long flags;
1593
1594         qp = get_ocrdma_qp(ibqp);
1595         dev = qp->dev;
1596
1597         attrs.qp_state = IB_QPS_ERR;
1598         pd = qp->pd;
1599
1600         /* change the QP state to ERROR */
1601         _ocrdma_modify_qp(ibqp, &attrs, attr_mask);
1602
1603         /* ensure that CQEs for newly created QP (whose id may be same with
1604          * one which just getting destroyed are same), dont get
1605          * discarded until the old CQEs are discarded.
1606          */
1607         mutex_lock(&dev->dev_lock);
1608         status = ocrdma_mbx_destroy_qp(dev, qp);
1609
1610         /*
1611          * acquire CQ lock while destroy is in progress, in order to
1612          * protect against proessing in-flight CQEs for this QP.
1613          */
1614         spin_lock_irqsave(&qp->sq_cq->cq_lock, flags);
1615         if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
1616                 spin_lock(&qp->rq_cq->cq_lock);
1617
1618         ocrdma_del_qpn_map(dev, qp);
1619
1620         if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
1621                 spin_unlock(&qp->rq_cq->cq_lock);
1622         spin_unlock_irqrestore(&qp->sq_cq->cq_lock, flags);
1623
1624         if (!pd->uctx) {
1625                 ocrdma_discard_cqes(qp, qp->sq_cq);
1626                 ocrdma_discard_cqes(qp, qp->rq_cq);
1627         }
1628         mutex_unlock(&dev->dev_lock);
1629
1630         if (pd->uctx) {
1631                 ocrdma_del_mmap(pd->uctx, (u64) qp->sq.pa,
1632                                 PAGE_ALIGN(qp->sq.len));
1633                 if (!qp->srq)
1634                         ocrdma_del_mmap(pd->uctx, (u64) qp->rq.pa,
1635                                         PAGE_ALIGN(qp->rq.len));
1636         }
1637
1638         ocrdma_del_flush_qp(qp);
1639
1640         kfree(qp->wqe_wr_id_tbl);
1641         kfree(qp->rqe_wr_id_tbl);
1642         kfree(qp);
1643         return status;
1644 }
1645
1646 static int ocrdma_copy_srq_uresp(struct ocrdma_dev *dev, struct ocrdma_srq *srq,
1647                                 struct ib_udata *udata)
1648 {
1649         int status;
1650         struct ocrdma_create_srq_uresp uresp;
1651
1652         memset(&uresp, 0, sizeof(uresp));
1653         uresp.rq_dbid = srq->rq.dbid;
1654         uresp.num_rq_pages = 1;
1655         uresp.rq_page_addr[0] = srq->rq.pa;
1656         uresp.rq_page_size = srq->rq.len;
1657         uresp.db_page_addr = dev->nic_info.unmapped_db +
1658             (srq->pd->id * dev->nic_info.db_page_size);
1659         uresp.db_page_size = dev->nic_info.db_page_size;
1660         uresp.num_rqe_allocated = srq->rq.max_cnt;
1661         if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
1662                 uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
1663                 uresp.db_shift = 24;
1664         } else {
1665                 uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET;
1666                 uresp.db_shift = 16;
1667         }
1668
1669         status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
1670         if (status)
1671                 return status;
1672         status = ocrdma_add_mmap(srq->pd->uctx, uresp.rq_page_addr[0],
1673                                  uresp.rq_page_size);
1674         if (status)
1675                 return status;
1676         return status;
1677 }
1678
1679 struct ib_srq *ocrdma_create_srq(struct ib_pd *ibpd,
1680                                  struct ib_srq_init_attr *init_attr,
1681                                  struct ib_udata *udata)
1682 {
1683         int status = -ENOMEM;
1684         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
1685         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
1686         struct ocrdma_srq *srq;
1687
1688         if (init_attr->attr.max_sge > dev->attr.max_recv_sge)
1689                 return ERR_PTR(-EINVAL);
1690         if (init_attr->attr.max_wr > dev->attr.max_rqe)
1691                 return ERR_PTR(-EINVAL);
1692
1693         srq = kzalloc(sizeof(*srq), GFP_KERNEL);
1694         if (!srq)
1695                 return ERR_PTR(status);
1696
1697         spin_lock_init(&srq->q_lock);
1698         srq->pd = pd;
1699         srq->db = dev->nic_info.db + (pd->id * dev->nic_info.db_page_size);
1700         status = ocrdma_mbx_create_srq(dev, srq, init_attr, pd);
1701         if (status)
1702                 goto err;
1703
1704         if (udata == NULL) {
1705                 srq->rqe_wr_id_tbl = kzalloc(sizeof(u64) * srq->rq.max_cnt,
1706                             GFP_KERNEL);
1707                 if (srq->rqe_wr_id_tbl == NULL)
1708                         goto arm_err;
1709
1710                 srq->bit_fields_len = (srq->rq.max_cnt / 32) +
1711                     (srq->rq.max_cnt % 32 ? 1 : 0);
1712                 srq->idx_bit_fields =
1713                     kmalloc(srq->bit_fields_len * sizeof(u32), GFP_KERNEL);
1714                 if (srq->idx_bit_fields == NULL)
1715                         goto arm_err;
1716                 memset(srq->idx_bit_fields, 0xff,
1717                        srq->bit_fields_len * sizeof(u32));
1718         }
1719
1720         if (init_attr->attr.srq_limit) {
1721                 status = ocrdma_mbx_modify_srq(srq, &init_attr->attr);
1722                 if (status)
1723                         goto arm_err;
1724         }
1725
1726         if (udata) {
1727                 status = ocrdma_copy_srq_uresp(dev, srq, udata);
1728                 if (status)
1729                         goto arm_err;
1730         }
1731
1732         return &srq->ibsrq;
1733
1734 arm_err:
1735         ocrdma_mbx_destroy_srq(dev, srq);
1736 err:
1737         kfree(srq->rqe_wr_id_tbl);
1738         kfree(srq->idx_bit_fields);
1739         kfree(srq);
1740         return ERR_PTR(status);
1741 }
1742
1743 int ocrdma_modify_srq(struct ib_srq *ibsrq,
1744                       struct ib_srq_attr *srq_attr,
1745                       enum ib_srq_attr_mask srq_attr_mask,
1746                       struct ib_udata *udata)
1747 {
1748         int status = 0;
1749         struct ocrdma_srq *srq;
1750
1751         srq = get_ocrdma_srq(ibsrq);
1752         if (srq_attr_mask & IB_SRQ_MAX_WR)
1753                 status = -EINVAL;
1754         else
1755                 status = ocrdma_mbx_modify_srq(srq, srq_attr);
1756         return status;
1757 }
1758
1759 int ocrdma_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
1760 {
1761         int status;
1762         struct ocrdma_srq *srq;
1763
1764         srq = get_ocrdma_srq(ibsrq);
1765         status = ocrdma_mbx_query_srq(srq, srq_attr);
1766         return status;
1767 }
1768
1769 int ocrdma_destroy_srq(struct ib_srq *ibsrq)
1770 {
1771         int status;
1772         struct ocrdma_srq *srq;
1773         struct ocrdma_dev *dev = get_ocrdma_dev(ibsrq->device);
1774
1775         srq = get_ocrdma_srq(ibsrq);
1776
1777         status = ocrdma_mbx_destroy_srq(dev, srq);
1778
1779         if (srq->pd->uctx)
1780                 ocrdma_del_mmap(srq->pd->uctx, (u64) srq->rq.pa,
1781                                 PAGE_ALIGN(srq->rq.len));
1782
1783         kfree(srq->idx_bit_fields);
1784         kfree(srq->rqe_wr_id_tbl);
1785         kfree(srq);
1786         return status;
1787 }
1788
1789 /* unprivileged verbs and their support functions. */
1790 static void ocrdma_build_ud_hdr(struct ocrdma_qp *qp,
1791                                 struct ocrdma_hdr_wqe *hdr,
1792                                 struct ib_send_wr *wr)
1793 {
1794         struct ocrdma_ewqe_ud_hdr *ud_hdr =
1795                 (struct ocrdma_ewqe_ud_hdr *)(hdr + 1);
1796         struct ocrdma_ah *ah = get_ocrdma_ah(wr->wr.ud.ah);
1797
1798         ud_hdr->rsvd_dest_qpn = wr->wr.ud.remote_qpn;
1799         if (qp->qp_type == IB_QPT_GSI)
1800                 ud_hdr->qkey = qp->qkey;
1801         else
1802                 ud_hdr->qkey = wr->wr.ud.remote_qkey;
1803         ud_hdr->rsvd_ahid = ah->id;
1804 }
1805
1806 static void ocrdma_build_sges(struct ocrdma_hdr_wqe *hdr,
1807                               struct ocrdma_sge *sge, int num_sge,
1808                               struct ib_sge *sg_list)
1809 {
1810         int i;
1811
1812         for (i = 0; i < num_sge; i++) {
1813                 sge[i].lrkey = sg_list[i].lkey;
1814                 sge[i].addr_lo = sg_list[i].addr;
1815                 sge[i].addr_hi = upper_32_bits(sg_list[i].addr);
1816                 sge[i].len = sg_list[i].length;
1817                 hdr->total_len += sg_list[i].length;
1818         }
1819         if (num_sge == 0)
1820                 memset(sge, 0, sizeof(*sge));
1821 }
1822
1823 static inline uint32_t ocrdma_sglist_len(struct ib_sge *sg_list, int num_sge)
1824 {
1825         uint32_t total_len = 0, i;
1826
1827         for (i = 0; i < num_sge; i++)
1828                 total_len += sg_list[i].length;
1829         return total_len;
1830 }
1831
1832
1833 static int ocrdma_build_inline_sges(struct ocrdma_qp *qp,
1834                                     struct ocrdma_hdr_wqe *hdr,
1835                                     struct ocrdma_sge *sge,
1836                                     struct ib_send_wr *wr, u32 wqe_size)
1837 {
1838         int i;
1839         char *dpp_addr;
1840
1841         if (wr->send_flags & IB_SEND_INLINE && qp->qp_type != IB_QPT_UD) {
1842                 hdr->total_len = ocrdma_sglist_len(wr->sg_list, wr->num_sge);
1843                 if (unlikely(hdr->total_len > qp->max_inline_data)) {
1844                         pr_err("%s() supported_len=0x%x,\n"
1845                                " unspported len req=0x%x\n", __func__,
1846                                 qp->max_inline_data, hdr->total_len);
1847                         return -EINVAL;
1848                 }
1849                 dpp_addr = (char *)sge;
1850                 for (i = 0; i < wr->num_sge; i++) {
1851                         memcpy(dpp_addr,
1852                                (void *)(unsigned long)wr->sg_list[i].addr,
1853                                wr->sg_list[i].length);
1854                         dpp_addr += wr->sg_list[i].length;
1855                 }
1856
1857                 wqe_size += roundup(hdr->total_len, OCRDMA_WQE_ALIGN_BYTES);
1858                 if (0 == hdr->total_len)
1859                         wqe_size += sizeof(struct ocrdma_sge);
1860                 hdr->cw |= (OCRDMA_TYPE_INLINE << OCRDMA_WQE_TYPE_SHIFT);
1861         } else {
1862                 ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
1863                 if (wr->num_sge)
1864                         wqe_size += (wr->num_sge * sizeof(struct ocrdma_sge));
1865                 else
1866                         wqe_size += sizeof(struct ocrdma_sge);
1867                 hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
1868         }
1869         hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
1870         return 0;
1871 }
1872
1873 static int ocrdma_build_send(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
1874                              struct ib_send_wr *wr)
1875 {
1876         int status;
1877         struct ocrdma_sge *sge;
1878         u32 wqe_size = sizeof(*hdr);
1879
1880         if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
1881                 ocrdma_build_ud_hdr(qp, hdr, wr);
1882                 sge = (struct ocrdma_sge *)(hdr + 2);
1883                 wqe_size += sizeof(struct ocrdma_ewqe_ud_hdr);
1884         } else {
1885                 sge = (struct ocrdma_sge *)(hdr + 1);
1886         }
1887
1888         status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
1889         return status;
1890 }
1891
1892 static int ocrdma_build_write(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
1893                               struct ib_send_wr *wr)
1894 {
1895         int status;
1896         struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
1897         struct ocrdma_sge *sge = ext_rw + 1;
1898         u32 wqe_size = sizeof(*hdr) + sizeof(*ext_rw);
1899
1900         status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
1901         if (status)
1902                 return status;
1903         ext_rw->addr_lo = wr->wr.rdma.remote_addr;
1904         ext_rw->addr_hi = upper_32_bits(wr->wr.rdma.remote_addr);
1905         ext_rw->lrkey = wr->wr.rdma.rkey;
1906         ext_rw->len = hdr->total_len;
1907         return 0;
1908 }
1909
1910 static void ocrdma_build_read(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
1911                               struct ib_send_wr *wr)
1912 {
1913         struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
1914         struct ocrdma_sge *sge = ext_rw + 1;
1915         u32 wqe_size = ((wr->num_sge + 1) * sizeof(struct ocrdma_sge)) +
1916             sizeof(struct ocrdma_hdr_wqe);
1917
1918         ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
1919         hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
1920         hdr->cw |= (OCRDMA_READ << OCRDMA_WQE_OPCODE_SHIFT);
1921         hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
1922
1923         ext_rw->addr_lo = wr->wr.rdma.remote_addr;
1924         ext_rw->addr_hi = upper_32_bits(wr->wr.rdma.remote_addr);
1925         ext_rw->lrkey = wr->wr.rdma.rkey;
1926         ext_rw->len = hdr->total_len;
1927 }
1928
1929 static void build_frmr_pbes(struct ib_send_wr *wr, struct ocrdma_pbl *pbl_tbl,
1930                             struct ocrdma_hw_mr *hwmr)
1931 {
1932         int i;
1933         u64 buf_addr = 0;
1934         int num_pbes;
1935         struct ocrdma_pbe *pbe;
1936
1937         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
1938         num_pbes = 0;
1939
1940         /* go through the OS phy regions & fill hw pbe entries into pbls. */
1941         for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) {
1942                 /* number of pbes can be more for one OS buf, when
1943                  * buffers are of different sizes.
1944                  * split the ib_buf to one or more pbes.
1945                  */
1946                 buf_addr = wr->wr.fast_reg.page_list->page_list[i];
1947                 pbe->pa_lo = cpu_to_le32((u32) (buf_addr & PAGE_MASK));
1948                 pbe->pa_hi = cpu_to_le32((u32) upper_32_bits(buf_addr));
1949                 num_pbes += 1;
1950                 pbe++;
1951
1952                 /* if the pbl is full storing the pbes,
1953                  * move to next pbl.
1954                 */
1955                 if (num_pbes == (hwmr->pbl_size/sizeof(u64))) {
1956                         pbl_tbl++;
1957                         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
1958                 }
1959         }
1960         return;
1961 }
1962
1963 static int get_encoded_page_size(int pg_sz)
1964 {
1965         /* Max size is 256M 4096 << 16 */
1966         int i = 0;
1967         for (; i < 17; i++)
1968                 if (pg_sz == (4096 << i))
1969                         break;
1970         return i;
1971 }
1972
1973
1974 static int ocrdma_build_fr(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
1975                            struct ib_send_wr *wr)
1976 {
1977         u64 fbo;
1978         struct ocrdma_ewqe_fr *fast_reg = (struct ocrdma_ewqe_fr *)(hdr + 1);
1979         struct ocrdma_mr *mr;
1980         u32 wqe_size = sizeof(*fast_reg) + sizeof(*hdr);
1981
1982         wqe_size = roundup(wqe_size, OCRDMA_WQE_ALIGN_BYTES);
1983
1984         if ((wr->wr.fast_reg.page_list_len >
1985                 qp->dev->attr.max_pages_per_frmr) ||
1986                 (wr->wr.fast_reg.length > 0xffffffffULL))
1987                 return -EINVAL;
1988
1989         hdr->cw |= (OCRDMA_FR_MR << OCRDMA_WQE_OPCODE_SHIFT);
1990         hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
1991
1992         if (wr->wr.fast_reg.page_list_len == 0)
1993                 BUG();
1994         if (wr->wr.fast_reg.access_flags & IB_ACCESS_LOCAL_WRITE)
1995                 hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_LOCAL_WR;
1996         if (wr->wr.fast_reg.access_flags & IB_ACCESS_REMOTE_WRITE)
1997                 hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_WR;
1998         if (wr->wr.fast_reg.access_flags & IB_ACCESS_REMOTE_READ)
1999                 hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_RD;
2000         hdr->lkey = wr->wr.fast_reg.rkey;
2001         hdr->total_len = wr->wr.fast_reg.length;
2002
2003         fbo = wr->wr.fast_reg.iova_start -
2004             (wr->wr.fast_reg.page_list->page_list[0] & PAGE_MASK);
2005
2006         fast_reg->va_hi = upper_32_bits(wr->wr.fast_reg.iova_start);
2007         fast_reg->va_lo = (u32) (wr->wr.fast_reg.iova_start & 0xffffffff);
2008         fast_reg->fbo_hi = upper_32_bits(fbo);
2009         fast_reg->fbo_lo = (u32) fbo & 0xffffffff;
2010         fast_reg->num_sges = wr->wr.fast_reg.page_list_len;
2011         fast_reg->size_sge =
2012                 get_encoded_page_size(1 << wr->wr.fast_reg.page_shift);
2013         mr = (struct ocrdma_mr *) (unsigned long) qp->dev->stag_arr[(hdr->lkey >> 8) &
2014                 (OCRDMA_MAX_STAG - 1)];
2015         build_frmr_pbes(wr, mr->hwmr.pbl_table, &mr->hwmr);
2016         return 0;
2017 }
2018
2019 static void ocrdma_ring_sq_db(struct ocrdma_qp *qp)
2020 {
2021         u32 val = qp->sq.dbid | (1 << 16);
2022
2023         iowrite32(val, qp->sq_db);
2024 }
2025
2026 int ocrdma_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2027                      struct ib_send_wr **bad_wr)
2028 {
2029         int status = 0;
2030         struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
2031         struct ocrdma_hdr_wqe *hdr;
2032         unsigned long flags;
2033
2034         spin_lock_irqsave(&qp->q_lock, flags);
2035         if (qp->state != OCRDMA_QPS_RTS && qp->state != OCRDMA_QPS_SQD) {
2036                 spin_unlock_irqrestore(&qp->q_lock, flags);
2037                 *bad_wr = wr;
2038                 return -EINVAL;
2039         }
2040
2041         while (wr) {
2042                 if (ocrdma_hwq_free_cnt(&qp->sq) == 0 ||
2043                     wr->num_sge > qp->sq.max_sges) {
2044                         *bad_wr = wr;
2045                         status = -ENOMEM;
2046                         break;
2047                 }
2048                 hdr = ocrdma_hwq_head(&qp->sq);
2049                 hdr->cw = 0;
2050                 if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled)
2051                         hdr->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
2052                 if (wr->send_flags & IB_SEND_FENCE)
2053                         hdr->cw |=
2054                             (OCRDMA_FLAG_FENCE_L << OCRDMA_WQE_FLAGS_SHIFT);
2055                 if (wr->send_flags & IB_SEND_SOLICITED)
2056                         hdr->cw |=
2057                             (OCRDMA_FLAG_SOLICIT << OCRDMA_WQE_FLAGS_SHIFT);
2058                 hdr->total_len = 0;
2059                 switch (wr->opcode) {
2060                 case IB_WR_SEND_WITH_IMM:
2061                         hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
2062                         hdr->immdt = ntohl(wr->ex.imm_data);
2063                 case IB_WR_SEND:
2064                         hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
2065                         ocrdma_build_send(qp, hdr, wr);
2066                         break;
2067                 case IB_WR_SEND_WITH_INV:
2068                         hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT);
2069                         hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
2070                         hdr->lkey = wr->ex.invalidate_rkey;
2071                         status = ocrdma_build_send(qp, hdr, wr);
2072                         break;
2073                 case IB_WR_RDMA_WRITE_WITH_IMM:
2074                         hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
2075                         hdr->immdt = ntohl(wr->ex.imm_data);
2076                 case IB_WR_RDMA_WRITE:
2077                         hdr->cw |= (OCRDMA_WRITE << OCRDMA_WQE_OPCODE_SHIFT);
2078                         status = ocrdma_build_write(qp, hdr, wr);
2079                         break;
2080                 case IB_WR_RDMA_READ_WITH_INV:
2081                         hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT);
2082                 case IB_WR_RDMA_READ:
2083                         ocrdma_build_read(qp, hdr, wr);
2084                         break;
2085                 case IB_WR_LOCAL_INV:
2086                         hdr->cw |=
2087                             (OCRDMA_LKEY_INV << OCRDMA_WQE_OPCODE_SHIFT);
2088                         hdr->cw |= ((sizeof(struct ocrdma_hdr_wqe) +
2089                                         sizeof(struct ocrdma_sge)) /
2090                                 OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT;
2091                         hdr->lkey = wr->ex.invalidate_rkey;
2092                         break;
2093                 case IB_WR_FAST_REG_MR:
2094                         status = ocrdma_build_fr(qp, hdr, wr);
2095                         break;
2096                 default:
2097                         status = -EINVAL;
2098                         break;
2099                 }
2100                 if (status) {
2101                         *bad_wr = wr;
2102                         break;
2103                 }
2104                 if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled)
2105                         qp->wqe_wr_id_tbl[qp->sq.head].signaled = 1;
2106                 else
2107                         qp->wqe_wr_id_tbl[qp->sq.head].signaled = 0;
2108                 qp->wqe_wr_id_tbl[qp->sq.head].wrid = wr->wr_id;
2109                 ocrdma_cpu_to_le32(hdr, ((hdr->cw >> OCRDMA_WQE_SIZE_SHIFT) &
2110                                    OCRDMA_WQE_SIZE_MASK) * OCRDMA_WQE_STRIDE);
2111                 /* make sure wqe is written before adapter can access it */
2112                 wmb();
2113                 /* inform hw to start processing it */
2114                 ocrdma_ring_sq_db(qp);
2115
2116                 /* update pointer, counter for next wr */
2117                 ocrdma_hwq_inc_head(&qp->sq);
2118                 wr = wr->next;
2119         }
2120         spin_unlock_irqrestore(&qp->q_lock, flags);
2121         return status;
2122 }
2123
2124 static void ocrdma_ring_rq_db(struct ocrdma_qp *qp)
2125 {
2126         u32 val = qp->rq.dbid | (1 << ocrdma_get_num_posted_shift(qp));
2127
2128         if (qp->state != OCRDMA_QPS_INIT)
2129                 iowrite32(val, qp->rq_db);
2130         else
2131                 qp->db_cache++;
2132 }
2133
2134 static void ocrdma_build_rqe(struct ocrdma_hdr_wqe *rqe, struct ib_recv_wr *wr,
2135                              u16 tag)
2136 {
2137         u32 wqe_size = 0;
2138         struct ocrdma_sge *sge;
2139         if (wr->num_sge)
2140                 wqe_size = (wr->num_sge * sizeof(*sge)) + sizeof(*rqe);
2141         else
2142                 wqe_size = sizeof(*sge) + sizeof(*rqe);
2143
2144         rqe->cw = ((wqe_size / OCRDMA_WQE_STRIDE) <<
2145                                 OCRDMA_WQE_SIZE_SHIFT);
2146         rqe->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
2147         rqe->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
2148         rqe->total_len = 0;
2149         rqe->rsvd_tag = tag;
2150         sge = (struct ocrdma_sge *)(rqe + 1);
2151         ocrdma_build_sges(rqe, sge, wr->num_sge, wr->sg_list);
2152         ocrdma_cpu_to_le32(rqe, wqe_size);
2153 }
2154
2155 int ocrdma_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2156                      struct ib_recv_wr **bad_wr)
2157 {
2158         int status = 0;
2159         unsigned long flags;
2160         struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
2161         struct ocrdma_hdr_wqe *rqe;
2162
2163         spin_lock_irqsave(&qp->q_lock, flags);
2164         if (qp->state == OCRDMA_QPS_RST || qp->state == OCRDMA_QPS_ERR) {
2165                 spin_unlock_irqrestore(&qp->q_lock, flags);
2166                 *bad_wr = wr;
2167                 return -EINVAL;
2168         }
2169         while (wr) {
2170                 if (ocrdma_hwq_free_cnt(&qp->rq) == 0 ||
2171                     wr->num_sge > qp->rq.max_sges) {
2172                         *bad_wr = wr;
2173                         status = -ENOMEM;
2174                         break;
2175                 }
2176                 rqe = ocrdma_hwq_head(&qp->rq);
2177                 ocrdma_build_rqe(rqe, wr, 0);
2178
2179                 qp->rqe_wr_id_tbl[qp->rq.head] = wr->wr_id;
2180                 /* make sure rqe is written before adapter can access it */
2181                 wmb();
2182
2183                 /* inform hw to start processing it */
2184                 ocrdma_ring_rq_db(qp);
2185
2186                 /* update pointer, counter for next wr */
2187                 ocrdma_hwq_inc_head(&qp->rq);
2188                 wr = wr->next;
2189         }
2190         spin_unlock_irqrestore(&qp->q_lock, flags);
2191         return status;
2192 }
2193
2194 /* cqe for srq's rqe can potentially arrive out of order.
2195  * index gives the entry in the shadow table where to store
2196  * the wr_id. tag/index is returned in cqe to reference back
2197  * for a given rqe.
2198  */
2199 static int ocrdma_srq_get_idx(struct ocrdma_srq *srq)
2200 {
2201         int row = 0;
2202         int indx = 0;
2203
2204         for (row = 0; row < srq->bit_fields_len; row++) {
2205                 if (srq->idx_bit_fields[row]) {
2206                         indx = ffs(srq->idx_bit_fields[row]);
2207                         indx = (row * 32) + (indx - 1);
2208                         if (indx >= srq->rq.max_cnt)
2209                                 BUG();
2210                         ocrdma_srq_toggle_bit(srq, indx);
2211                         break;
2212                 }
2213         }
2214
2215         if (row == srq->bit_fields_len)
2216                 BUG();
2217         return indx;
2218 }
2219
2220 static void ocrdma_ring_srq_db(struct ocrdma_srq *srq)
2221 {
2222         u32 val = srq->rq.dbid | (1 << 16);
2223
2224         iowrite32(val, srq->db + OCRDMA_DB_GEN2_SRQ_OFFSET);
2225 }
2226
2227 int ocrdma_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
2228                          struct ib_recv_wr **bad_wr)
2229 {
2230         int status = 0;
2231         unsigned long flags;
2232         struct ocrdma_srq *srq;
2233         struct ocrdma_hdr_wqe *rqe;
2234         u16 tag;
2235
2236         srq = get_ocrdma_srq(ibsrq);
2237
2238         spin_lock_irqsave(&srq->q_lock, flags);
2239         while (wr) {
2240                 if (ocrdma_hwq_free_cnt(&srq->rq) == 0 ||
2241                     wr->num_sge > srq->rq.max_sges) {
2242                         status = -ENOMEM;
2243                         *bad_wr = wr;
2244                         break;
2245                 }
2246                 tag = ocrdma_srq_get_idx(srq);
2247                 rqe = ocrdma_hwq_head(&srq->rq);
2248                 ocrdma_build_rqe(rqe, wr, tag);
2249
2250                 srq->rqe_wr_id_tbl[tag] = wr->wr_id;
2251                 /* make sure rqe is written before adapter can perform DMA */
2252                 wmb();
2253                 /* inform hw to start processing it */
2254                 ocrdma_ring_srq_db(srq);
2255                 /* update pointer, counter for next wr */
2256                 ocrdma_hwq_inc_head(&srq->rq);
2257                 wr = wr->next;
2258         }
2259         spin_unlock_irqrestore(&srq->q_lock, flags);
2260         return status;
2261 }
2262
2263 static enum ib_wc_status ocrdma_to_ibwc_err(u16 status)
2264 {
2265         enum ib_wc_status ibwc_status;
2266
2267         switch (status) {
2268         case OCRDMA_CQE_GENERAL_ERR:
2269                 ibwc_status = IB_WC_GENERAL_ERR;
2270                 break;
2271         case OCRDMA_CQE_LOC_LEN_ERR:
2272                 ibwc_status = IB_WC_LOC_LEN_ERR;
2273                 break;
2274         case OCRDMA_CQE_LOC_QP_OP_ERR:
2275                 ibwc_status = IB_WC_LOC_QP_OP_ERR;
2276                 break;
2277         case OCRDMA_CQE_LOC_EEC_OP_ERR:
2278                 ibwc_status = IB_WC_LOC_EEC_OP_ERR;
2279                 break;
2280         case OCRDMA_CQE_LOC_PROT_ERR:
2281                 ibwc_status = IB_WC_LOC_PROT_ERR;
2282                 break;
2283         case OCRDMA_CQE_WR_FLUSH_ERR:
2284                 ibwc_status = IB_WC_WR_FLUSH_ERR;
2285                 break;
2286         case OCRDMA_CQE_MW_BIND_ERR:
2287                 ibwc_status = IB_WC_MW_BIND_ERR;
2288                 break;
2289         case OCRDMA_CQE_BAD_RESP_ERR:
2290                 ibwc_status = IB_WC_BAD_RESP_ERR;
2291                 break;
2292         case OCRDMA_CQE_LOC_ACCESS_ERR:
2293                 ibwc_status = IB_WC_LOC_ACCESS_ERR;
2294                 break;
2295         case OCRDMA_CQE_REM_INV_REQ_ERR:
2296                 ibwc_status = IB_WC_REM_INV_REQ_ERR;
2297                 break;
2298         case OCRDMA_CQE_REM_ACCESS_ERR:
2299                 ibwc_status = IB_WC_REM_ACCESS_ERR;
2300                 break;
2301         case OCRDMA_CQE_REM_OP_ERR:
2302                 ibwc_status = IB_WC_REM_OP_ERR;
2303                 break;
2304         case OCRDMA_CQE_RETRY_EXC_ERR:
2305                 ibwc_status = IB_WC_RETRY_EXC_ERR;
2306                 break;
2307         case OCRDMA_CQE_RNR_RETRY_EXC_ERR:
2308                 ibwc_status = IB_WC_RNR_RETRY_EXC_ERR;
2309                 break;
2310         case OCRDMA_CQE_LOC_RDD_VIOL_ERR:
2311                 ibwc_status = IB_WC_LOC_RDD_VIOL_ERR;
2312                 break;
2313         case OCRDMA_CQE_REM_INV_RD_REQ_ERR:
2314                 ibwc_status = IB_WC_REM_INV_RD_REQ_ERR;
2315                 break;
2316         case OCRDMA_CQE_REM_ABORT_ERR:
2317                 ibwc_status = IB_WC_REM_ABORT_ERR;
2318                 break;
2319         case OCRDMA_CQE_INV_EECN_ERR:
2320                 ibwc_status = IB_WC_INV_EECN_ERR;
2321                 break;
2322         case OCRDMA_CQE_INV_EEC_STATE_ERR:
2323                 ibwc_status = IB_WC_INV_EEC_STATE_ERR;
2324                 break;
2325         case OCRDMA_CQE_FATAL_ERR:
2326                 ibwc_status = IB_WC_FATAL_ERR;
2327                 break;
2328         case OCRDMA_CQE_RESP_TIMEOUT_ERR:
2329                 ibwc_status = IB_WC_RESP_TIMEOUT_ERR;
2330                 break;
2331         default:
2332                 ibwc_status = IB_WC_GENERAL_ERR;
2333                 break;
2334         };
2335         return ibwc_status;
2336 }
2337
2338 static void ocrdma_update_wc(struct ocrdma_qp *qp, struct ib_wc *ibwc,
2339                       u32 wqe_idx)
2340 {
2341         struct ocrdma_hdr_wqe *hdr;
2342         struct ocrdma_sge *rw;
2343         int opcode;
2344
2345         hdr = ocrdma_hwq_head_from_idx(&qp->sq, wqe_idx);
2346
2347         ibwc->wr_id = qp->wqe_wr_id_tbl[wqe_idx].wrid;
2348         /* Undo the hdr->cw swap */
2349         opcode = le32_to_cpu(hdr->cw) & OCRDMA_WQE_OPCODE_MASK;
2350         switch (opcode) {
2351         case OCRDMA_WRITE:
2352                 ibwc->opcode = IB_WC_RDMA_WRITE;
2353                 break;
2354         case OCRDMA_READ:
2355                 rw = (struct ocrdma_sge *)(hdr + 1);
2356                 ibwc->opcode = IB_WC_RDMA_READ;
2357                 ibwc->byte_len = rw->len;
2358                 break;
2359         case OCRDMA_SEND:
2360                 ibwc->opcode = IB_WC_SEND;
2361                 break;
2362         case OCRDMA_FR_MR:
2363                 ibwc->opcode = IB_WC_FAST_REG_MR;
2364                 break;
2365         case OCRDMA_LKEY_INV:
2366                 ibwc->opcode = IB_WC_LOCAL_INV;
2367                 break;
2368         default:
2369                 ibwc->status = IB_WC_GENERAL_ERR;
2370                 pr_err("%s() invalid opcode received = 0x%x\n",
2371                        __func__, hdr->cw & OCRDMA_WQE_OPCODE_MASK);
2372                 break;
2373         };
2374 }
2375
2376 static void ocrdma_set_cqe_status_flushed(struct ocrdma_qp *qp,
2377                                                 struct ocrdma_cqe *cqe)
2378 {
2379         if (is_cqe_for_sq(cqe)) {
2380                 cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2381                                 cqe->flags_status_srcqpn) &
2382                                         ~OCRDMA_CQE_STATUS_MASK);
2383                 cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2384                                 cqe->flags_status_srcqpn) |
2385                                 (OCRDMA_CQE_WR_FLUSH_ERR <<
2386                                         OCRDMA_CQE_STATUS_SHIFT));
2387         } else {
2388                 if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
2389                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2390                                         cqe->flags_status_srcqpn) &
2391                                                 ~OCRDMA_CQE_UD_STATUS_MASK);
2392                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2393                                         cqe->flags_status_srcqpn) |
2394                                         (OCRDMA_CQE_WR_FLUSH_ERR <<
2395                                                 OCRDMA_CQE_UD_STATUS_SHIFT));
2396                 } else {
2397                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2398                                         cqe->flags_status_srcqpn) &
2399                                                 ~OCRDMA_CQE_STATUS_MASK);
2400                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2401                                         cqe->flags_status_srcqpn) |
2402                                         (OCRDMA_CQE_WR_FLUSH_ERR <<
2403                                                 OCRDMA_CQE_STATUS_SHIFT));
2404                 }
2405         }
2406 }
2407
2408 static bool ocrdma_update_err_cqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
2409                                   struct ocrdma_qp *qp, int status)
2410 {
2411         bool expand = false;
2412
2413         ibwc->byte_len = 0;
2414         ibwc->qp = &qp->ibqp;
2415         ibwc->status = ocrdma_to_ibwc_err(status);
2416
2417         ocrdma_flush_qp(qp);
2418         ocrdma_qp_state_change(qp, IB_QPS_ERR, NULL);
2419
2420         /* if wqe/rqe pending for which cqe needs to be returned,
2421          * trigger inflating it.
2422          */
2423         if (!is_hw_rq_empty(qp) || !is_hw_sq_empty(qp)) {
2424                 expand = true;
2425                 ocrdma_set_cqe_status_flushed(qp, cqe);
2426         }
2427         return expand;
2428 }
2429
2430 static int ocrdma_update_err_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
2431                                   struct ocrdma_qp *qp, int status)
2432 {
2433         ibwc->opcode = IB_WC_RECV;
2434         ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
2435         ocrdma_hwq_inc_tail(&qp->rq);
2436
2437         return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
2438 }
2439
2440 static int ocrdma_update_err_scqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
2441                                   struct ocrdma_qp *qp, int status)
2442 {
2443         ocrdma_update_wc(qp, ibwc, qp->sq.tail);
2444         ocrdma_hwq_inc_tail(&qp->sq);
2445
2446         return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
2447 }
2448
2449
2450 static bool ocrdma_poll_err_scqe(struct ocrdma_qp *qp,
2451                                  struct ocrdma_cqe *cqe, struct ib_wc *ibwc,
2452                                  bool *polled, bool *stop)
2453 {
2454         bool expand;
2455         int status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2456                 OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
2457
2458         /* when hw sq is empty, but rq is not empty, so we continue
2459          * to keep the cqe in order to get the cq event again.
2460          */
2461         if (is_hw_sq_empty(qp) && !is_hw_rq_empty(qp)) {
2462                 /* when cq for rq and sq is same, it is safe to return
2463                  * flush cqe for RQEs.
2464                  */
2465                 if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
2466                         *polled = true;
2467                         status = OCRDMA_CQE_WR_FLUSH_ERR;
2468                         expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
2469                 } else {
2470                         /* stop processing further cqe as this cqe is used for
2471                          * triggering cq event on buddy cq of RQ.
2472                          * When QP is destroyed, this cqe will be removed
2473                          * from the cq's hardware q.
2474                          */
2475                         *polled = false;
2476                         *stop = true;
2477                         expand = false;
2478                 }
2479         } else {
2480                 *polled = true;
2481                 expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
2482         }
2483         return expand;
2484 }
2485
2486 static bool ocrdma_poll_success_scqe(struct ocrdma_qp *qp,
2487                                      struct ocrdma_cqe *cqe,
2488                                      struct ib_wc *ibwc, bool *polled)
2489 {
2490         bool expand = false;
2491         int tail = qp->sq.tail;
2492         u32 wqe_idx;
2493
2494         if (!qp->wqe_wr_id_tbl[tail].signaled) {
2495                 *polled = false;    /* WC cannot be consumed yet */
2496         } else {
2497                 ibwc->status = IB_WC_SUCCESS;
2498                 ibwc->wc_flags = 0;
2499                 ibwc->qp = &qp->ibqp;
2500                 ocrdma_update_wc(qp, ibwc, tail);
2501                 *polled = true;
2502         }
2503         wqe_idx = (le32_to_cpu(cqe->wq.wqeidx) &
2504                         OCRDMA_CQE_WQEIDX_MASK) & qp->sq.max_wqe_idx;
2505         if (tail != wqe_idx)
2506                 expand = true; /* Coalesced CQE can't be consumed yet */
2507
2508         ocrdma_hwq_inc_tail(&qp->sq);
2509         return expand;
2510 }
2511
2512 static bool ocrdma_poll_scqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
2513                              struct ib_wc *ibwc, bool *polled, bool *stop)
2514 {
2515         int status;
2516         bool expand;
2517
2518         status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2519                 OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
2520
2521         if (status == OCRDMA_CQE_SUCCESS)
2522                 expand = ocrdma_poll_success_scqe(qp, cqe, ibwc, polled);
2523         else
2524                 expand = ocrdma_poll_err_scqe(qp, cqe, ibwc, polled, stop);
2525         return expand;
2526 }
2527
2528 static int ocrdma_update_ud_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe)
2529 {
2530         int status;
2531
2532         status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2533                 OCRDMA_CQE_UD_STATUS_MASK) >> OCRDMA_CQE_UD_STATUS_SHIFT;
2534         ibwc->src_qp = le32_to_cpu(cqe->flags_status_srcqpn) &
2535                                                 OCRDMA_CQE_SRCQP_MASK;
2536         ibwc->pkey_index = le32_to_cpu(cqe->ud.rxlen_pkey) &
2537                                                 OCRDMA_CQE_PKEY_MASK;
2538         ibwc->wc_flags = IB_WC_GRH;
2539         ibwc->byte_len = (le32_to_cpu(cqe->ud.rxlen_pkey) >>
2540                                         OCRDMA_CQE_UD_XFER_LEN_SHIFT);
2541         return status;
2542 }
2543
2544 static void ocrdma_update_free_srq_cqe(struct ib_wc *ibwc,
2545                                        struct ocrdma_cqe *cqe,
2546                                        struct ocrdma_qp *qp)
2547 {
2548         unsigned long flags;
2549         struct ocrdma_srq *srq;
2550         u32 wqe_idx;
2551
2552         srq = get_ocrdma_srq(qp->ibqp.srq);
2553         wqe_idx = (le32_to_cpu(cqe->rq.buftag_qpn) >>
2554                         OCRDMA_CQE_BUFTAG_SHIFT) & srq->rq.max_wqe_idx;
2555         ibwc->wr_id = srq->rqe_wr_id_tbl[wqe_idx];
2556         spin_lock_irqsave(&srq->q_lock, flags);
2557         ocrdma_srq_toggle_bit(srq, wqe_idx);
2558         spin_unlock_irqrestore(&srq->q_lock, flags);
2559         ocrdma_hwq_inc_tail(&srq->rq);
2560 }
2561
2562 static bool ocrdma_poll_err_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
2563                                 struct ib_wc *ibwc, bool *polled, bool *stop,
2564                                 int status)
2565 {
2566         bool expand;
2567
2568         /* when hw_rq is empty, but wq is not empty, so continue
2569          * to keep the cqe to get the cq event again.
2570          */
2571         if (is_hw_rq_empty(qp) && !is_hw_sq_empty(qp)) {
2572                 if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
2573                         *polled = true;
2574                         status = OCRDMA_CQE_WR_FLUSH_ERR;
2575                         expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
2576                 } else {
2577                         *polled = false;
2578                         *stop = true;
2579                         expand = false;
2580                 }
2581         } else {
2582                 *polled = true;
2583                 expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
2584         }
2585         return expand;
2586 }
2587
2588 static void ocrdma_poll_success_rcqe(struct ocrdma_qp *qp,
2589                                      struct ocrdma_cqe *cqe, struct ib_wc *ibwc)
2590 {
2591         ibwc->opcode = IB_WC_RECV;
2592         ibwc->qp = &qp->ibqp;
2593         ibwc->status = IB_WC_SUCCESS;
2594
2595         if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI)
2596                 ocrdma_update_ud_rcqe(ibwc, cqe);
2597         else
2598                 ibwc->byte_len = le32_to_cpu(cqe->rq.rxlen);
2599
2600         if (is_cqe_imm(cqe)) {
2601                 ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
2602                 ibwc->wc_flags |= IB_WC_WITH_IMM;
2603         } else if (is_cqe_wr_imm(cqe)) {
2604                 ibwc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
2605                 ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
2606                 ibwc->wc_flags |= IB_WC_WITH_IMM;
2607         } else if (is_cqe_invalidated(cqe)) {
2608                 ibwc->ex.invalidate_rkey = le32_to_cpu(cqe->rq.lkey_immdt);
2609                 ibwc->wc_flags |= IB_WC_WITH_INVALIDATE;
2610         }
2611         if (qp->ibqp.srq) {
2612                 ocrdma_update_free_srq_cqe(ibwc, cqe, qp);
2613         } else {
2614                 ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
2615                 ocrdma_hwq_inc_tail(&qp->rq);
2616         }
2617 }
2618
2619 static bool ocrdma_poll_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
2620                              struct ib_wc *ibwc, bool *polled, bool *stop)
2621 {
2622         int status;
2623         bool expand = false;
2624
2625         ibwc->wc_flags = 0;
2626         if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
2627                 status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2628                                         OCRDMA_CQE_UD_STATUS_MASK) >>
2629                                         OCRDMA_CQE_UD_STATUS_SHIFT;
2630         } else {
2631                 status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2632                              OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
2633         }
2634
2635         if (status == OCRDMA_CQE_SUCCESS) {
2636                 *polled = true;
2637                 ocrdma_poll_success_rcqe(qp, cqe, ibwc);
2638         } else {
2639                 expand = ocrdma_poll_err_rcqe(qp, cqe, ibwc, polled, stop,
2640                                               status);
2641         }
2642         return expand;
2643 }
2644
2645 static void ocrdma_change_cq_phase(struct ocrdma_cq *cq, struct ocrdma_cqe *cqe,
2646                                    u16 cur_getp)
2647 {
2648         if (cq->phase_change) {
2649                 if (cur_getp == 0)
2650                         cq->phase = (~cq->phase & OCRDMA_CQE_VALID);
2651         } else {
2652                 /* clear valid bit */
2653                 cqe->flags_status_srcqpn = 0;
2654         }
2655 }
2656
2657 static int ocrdma_poll_hwcq(struct ocrdma_cq *cq, int num_entries,
2658                             struct ib_wc *ibwc)
2659 {
2660         u16 qpn = 0;
2661         int i = 0;
2662         bool expand = false;
2663         int polled_hw_cqes = 0;
2664         struct ocrdma_qp *qp = NULL;
2665         struct ocrdma_dev *dev = get_ocrdma_dev(cq->ibcq.device);
2666         struct ocrdma_cqe *cqe;
2667         u16 cur_getp; bool polled = false; bool stop = false;
2668
2669         cur_getp = cq->getp;
2670         while (num_entries) {
2671                 cqe = cq->va + cur_getp;
2672                 /* check whether valid cqe or not */
2673                 if (!is_cqe_valid(cq, cqe))
2674                         break;
2675                 qpn = (le32_to_cpu(cqe->cmn.qpn) & OCRDMA_CQE_QPN_MASK);
2676                 /* ignore discarded cqe */
2677                 if (qpn == 0)
2678                         goto skip_cqe;
2679                 qp = dev->qp_tbl[qpn];
2680                 BUG_ON(qp == NULL);
2681
2682                 if (is_cqe_for_sq(cqe)) {
2683                         expand = ocrdma_poll_scqe(qp, cqe, ibwc, &polled,
2684                                                   &stop);
2685                 } else {
2686                         expand = ocrdma_poll_rcqe(qp, cqe, ibwc, &polled,
2687                                                   &stop);
2688                 }
2689                 if (expand)
2690                         goto expand_cqe;
2691                 if (stop)
2692                         goto stop_cqe;
2693                 /* clear qpn to avoid duplicate processing by discard_cqe() */
2694                 cqe->cmn.qpn = 0;
2695 skip_cqe:
2696                 polled_hw_cqes += 1;
2697                 cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
2698                 ocrdma_change_cq_phase(cq, cqe, cur_getp);
2699 expand_cqe:
2700                 if (polled) {
2701                         num_entries -= 1;
2702                         i += 1;
2703                         ibwc = ibwc + 1;
2704                         polled = false;
2705                 }
2706         }
2707 stop_cqe:
2708         cq->getp = cur_getp;
2709         if (polled_hw_cqes || expand || stop) {
2710                 ocrdma_ring_cq_db(dev, cq->id, cq->armed, cq->solicited,
2711                                   polled_hw_cqes);
2712         }
2713         return i;
2714 }
2715
2716 /* insert error cqe if the QP's SQ or RQ's CQ matches the CQ under poll. */
2717 static int ocrdma_add_err_cqe(struct ocrdma_cq *cq, int num_entries,
2718                               struct ocrdma_qp *qp, struct ib_wc *ibwc)
2719 {
2720         int err_cqes = 0;
2721
2722         while (num_entries) {
2723                 if (is_hw_sq_empty(qp) && is_hw_rq_empty(qp))
2724                         break;
2725                 if (!is_hw_sq_empty(qp) && qp->sq_cq == cq) {
2726                         ocrdma_update_wc(qp, ibwc, qp->sq.tail);
2727                         ocrdma_hwq_inc_tail(&qp->sq);
2728                 } else if (!is_hw_rq_empty(qp) && qp->rq_cq == cq) {
2729                         ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
2730                         ocrdma_hwq_inc_tail(&qp->rq);
2731                 } else {
2732                         return err_cqes;
2733                 }
2734                 ibwc->byte_len = 0;
2735                 ibwc->status = IB_WC_WR_FLUSH_ERR;
2736                 ibwc = ibwc + 1;
2737                 err_cqes += 1;
2738                 num_entries -= 1;
2739         }
2740         return err_cqes;
2741 }
2742
2743 int ocrdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
2744 {
2745         int cqes_to_poll = num_entries;
2746         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
2747         struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
2748         int num_os_cqe = 0, err_cqes = 0;
2749         struct ocrdma_qp *qp;
2750         unsigned long flags;
2751
2752         /* poll cqes from adapter CQ */
2753         spin_lock_irqsave(&cq->cq_lock, flags);
2754         num_os_cqe = ocrdma_poll_hwcq(cq, cqes_to_poll, wc);
2755         spin_unlock_irqrestore(&cq->cq_lock, flags);
2756         cqes_to_poll -= num_os_cqe;
2757
2758         if (cqes_to_poll) {
2759                 wc = wc + num_os_cqe;
2760                 /* adapter returns single error cqe when qp moves to
2761                  * error state. So insert error cqes with wc_status as
2762                  * FLUSHED for pending WQEs and RQEs of QP's SQ and RQ
2763                  * respectively which uses this CQ.
2764                  */
2765                 spin_lock_irqsave(&dev->flush_q_lock, flags);
2766                 list_for_each_entry(qp, &cq->sq_head, sq_entry) {
2767                         if (cqes_to_poll == 0)
2768                                 break;
2769                         err_cqes = ocrdma_add_err_cqe(cq, cqes_to_poll, qp, wc);
2770                         cqes_to_poll -= err_cqes;
2771                         num_os_cqe += err_cqes;
2772                         wc = wc + err_cqes;
2773                 }
2774                 spin_unlock_irqrestore(&dev->flush_q_lock, flags);
2775         }
2776         return num_os_cqe;
2777 }
2778
2779 int ocrdma_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags cq_flags)
2780 {
2781         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
2782         struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
2783         u16 cq_id;
2784         u16 cur_getp;
2785         struct ocrdma_cqe *cqe;
2786         unsigned long flags;
2787
2788         cq_id = cq->id;
2789
2790         spin_lock_irqsave(&cq->cq_lock, flags);
2791         if (cq_flags & IB_CQ_NEXT_COMP || cq_flags & IB_CQ_SOLICITED)
2792                 cq->armed = true;
2793         if (cq_flags & IB_CQ_SOLICITED)
2794                 cq->solicited = true;
2795
2796         cur_getp = cq->getp;
2797         cqe = cq->va + cur_getp;
2798
2799         /* check whether any valid cqe exist or not, if not then safe to
2800          * arm. If cqe is not yet consumed, then let it get consumed and then
2801          * we arm it to avoid false interrupts.
2802          */
2803         if (!is_cqe_valid(cq, cqe) || cq->arm_needed) {
2804                 cq->arm_needed = false;
2805                 ocrdma_ring_cq_db(dev, cq_id, cq->armed, cq->solicited, 0);
2806         }
2807         spin_unlock_irqrestore(&cq->cq_lock, flags);
2808         return 0;
2809 }
2810
2811 struct ib_mr *ocrdma_alloc_frmr(struct ib_pd *ibpd, int max_page_list_len)
2812 {
2813         int status;
2814         struct ocrdma_mr *mr;
2815         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
2816         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
2817
2818         if (max_page_list_len > dev->attr.max_pages_per_frmr)
2819                 return ERR_PTR(-EINVAL);
2820
2821         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
2822         if (!mr)
2823                 return ERR_PTR(-ENOMEM);
2824
2825         status = ocrdma_get_pbl_info(dev, mr, max_page_list_len);
2826         if (status)
2827                 goto pbl_err;
2828         mr->hwmr.fr_mr = 1;
2829         mr->hwmr.remote_rd = 0;
2830         mr->hwmr.remote_wr = 0;
2831         mr->hwmr.local_rd = 0;
2832         mr->hwmr.local_wr = 0;
2833         mr->hwmr.mw_bind = 0;
2834         status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
2835         if (status)
2836                 goto pbl_err;
2837         status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, 0);
2838         if (status)
2839                 goto mbx_err;
2840         mr->ibmr.rkey = mr->hwmr.lkey;
2841         mr->ibmr.lkey = mr->hwmr.lkey;
2842         dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] = (unsigned long) mr;
2843         return &mr->ibmr;
2844 mbx_err:
2845         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
2846 pbl_err:
2847         kfree(mr);
2848         return ERR_PTR(-ENOMEM);
2849 }
2850
2851 struct ib_fast_reg_page_list *ocrdma_alloc_frmr_page_list(struct ib_device
2852                                                           *ibdev,
2853                                                           int page_list_len)
2854 {
2855         struct ib_fast_reg_page_list *frmr_list;
2856         int size;
2857
2858         size = sizeof(*frmr_list) + (page_list_len * sizeof(u64));
2859         frmr_list = kzalloc(size, GFP_KERNEL);
2860         if (!frmr_list)
2861                 return ERR_PTR(-ENOMEM);
2862         frmr_list->page_list = (u64 *)(frmr_list + 1);
2863         return frmr_list;
2864 }
2865
2866 void ocrdma_free_frmr_page_list(struct ib_fast_reg_page_list *page_list)
2867 {
2868         kfree(page_list);
2869 }
2870
2871 #define MAX_KERNEL_PBE_SIZE 65536
2872 static inline int count_kernel_pbes(struct ib_phys_buf *buf_list,
2873                                     int buf_cnt, u32 *pbe_size)
2874 {
2875         u64 total_size = 0;
2876         u64 buf_size = 0;
2877         int i;
2878         *pbe_size = roundup(buf_list[0].size, PAGE_SIZE);
2879         *pbe_size = roundup_pow_of_two(*pbe_size);
2880
2881         /* find the smallest PBE size that we can have */
2882         for (i = 0; i < buf_cnt; i++) {
2883                 /* first addr may not be page aligned, so ignore checking */
2884                 if ((i != 0) && ((buf_list[i].addr & ~PAGE_MASK) ||
2885                                  (buf_list[i].size & ~PAGE_MASK))) {
2886                         return 0;
2887                 }
2888
2889                 /* if configured PBE size is greater then the chosen one,
2890                  * reduce the PBE size.
2891                  */
2892                 buf_size = roundup(buf_list[i].size, PAGE_SIZE);
2893                 /* pbe_size has to be even multiple of 4K 1,2,4,8...*/
2894                 buf_size = roundup_pow_of_two(buf_size);
2895                 if (*pbe_size > buf_size)
2896                         *pbe_size = buf_size;
2897
2898                 total_size += buf_size;
2899         }
2900         *pbe_size = *pbe_size > MAX_KERNEL_PBE_SIZE ?
2901             (MAX_KERNEL_PBE_SIZE) : (*pbe_size);
2902
2903         /* num_pbes = total_size / (*pbe_size);  this is implemented below. */
2904
2905         return total_size >> ilog2(*pbe_size);
2906 }
2907
2908 static void build_kernel_pbes(struct ib_phys_buf *buf_list, int ib_buf_cnt,
2909                               u32 pbe_size, struct ocrdma_pbl *pbl_tbl,
2910                               struct ocrdma_hw_mr *hwmr)
2911 {
2912         int i;
2913         int idx;
2914         int pbes_per_buf = 0;
2915         u64 buf_addr = 0;
2916         int num_pbes;
2917         struct ocrdma_pbe *pbe;
2918         int total_num_pbes = 0;
2919
2920         if (!hwmr->num_pbes)
2921                 return;
2922
2923         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
2924         num_pbes = 0;
2925
2926         /* go through the OS phy regions & fill hw pbe entries into pbls. */
2927         for (i = 0; i < ib_buf_cnt; i++) {
2928                 buf_addr = buf_list[i].addr;
2929                 pbes_per_buf =
2930                     roundup_pow_of_two(roundup(buf_list[i].size, PAGE_SIZE)) /
2931                     pbe_size;
2932                 hwmr->len += buf_list[i].size;
2933                 /* number of pbes can be more for one OS buf, when
2934                  * buffers are of different sizes.
2935                  * split the ib_buf to one or more pbes.
2936                  */
2937                 for (idx = 0; idx < pbes_per_buf; idx++) {
2938                         /* we program always page aligned addresses,
2939                          * first unaligned address is taken care by fbo.
2940                          */
2941                         if (i == 0) {
2942                                 /* for non zero fbo, assign the
2943                                  * start of the page.
2944                                  */
2945                                 pbe->pa_lo =
2946                                     cpu_to_le32((u32) (buf_addr & PAGE_MASK));
2947                                 pbe->pa_hi =
2948                                     cpu_to_le32((u32) upper_32_bits(buf_addr));
2949                         } else {
2950                                 pbe->pa_lo =
2951                                     cpu_to_le32((u32) (buf_addr & 0xffffffff));
2952                                 pbe->pa_hi =
2953                                     cpu_to_le32((u32) upper_32_bits(buf_addr));
2954                         }
2955                         buf_addr += pbe_size;
2956                         num_pbes += 1;
2957                         total_num_pbes += 1;
2958                         pbe++;
2959
2960                         if (total_num_pbes == hwmr->num_pbes)
2961                                 goto mr_tbl_done;
2962                         /* if the pbl is full storing the pbes,
2963                          * move to next pbl.
2964                          */
2965                         if (num_pbes == (hwmr->pbl_size/sizeof(u64))) {
2966                                 pbl_tbl++;
2967                                 pbe = (struct ocrdma_pbe *)pbl_tbl->va;
2968                                 num_pbes = 0;
2969                         }
2970                 }
2971         }
2972 mr_tbl_done:
2973         return;
2974 }
2975
2976 struct ib_mr *ocrdma_reg_kernel_mr(struct ib_pd *ibpd,
2977                                    struct ib_phys_buf *buf_list,
2978                                    int buf_cnt, int acc, u64 *iova_start)
2979 {
2980         int status = -ENOMEM;
2981         struct ocrdma_mr *mr;
2982         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
2983         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
2984         u32 num_pbes;
2985         u32 pbe_size = 0;
2986
2987         if ((acc & IB_ACCESS_REMOTE_WRITE) && !(acc & IB_ACCESS_LOCAL_WRITE))
2988                 return ERR_PTR(-EINVAL);
2989
2990         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
2991         if (!mr)
2992                 return ERR_PTR(status);
2993
2994         num_pbes = count_kernel_pbes(buf_list, buf_cnt, &pbe_size);
2995         if (num_pbes == 0) {
2996                 status = -EINVAL;
2997                 goto pbl_err;
2998         }
2999         status = ocrdma_get_pbl_info(dev, mr, num_pbes);
3000         if (status)
3001                 goto pbl_err;
3002
3003         mr->hwmr.pbe_size = pbe_size;
3004         mr->hwmr.fbo = *iova_start - (buf_list[0].addr & PAGE_MASK);
3005         mr->hwmr.va = *iova_start;
3006         mr->hwmr.local_rd = 1;
3007         mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
3008         mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
3009         mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
3010         mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
3011         mr->hwmr.mw_bind = (acc & IB_ACCESS_MW_BIND) ? 1 : 0;
3012
3013         status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
3014         if (status)
3015                 goto pbl_err;
3016         build_kernel_pbes(buf_list, buf_cnt, pbe_size, mr->hwmr.pbl_table,
3017                           &mr->hwmr);
3018         status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, acc);
3019         if (status)
3020                 goto mbx_err;
3021
3022         mr->ibmr.lkey = mr->hwmr.lkey;
3023         if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
3024                 mr->ibmr.rkey = mr->hwmr.lkey;
3025         return &mr->ibmr;
3026
3027 mbx_err:
3028         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
3029 pbl_err:
3030         kfree(mr);
3031         return ERR_PTR(status);
3032 }