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 = dev->attr.max_mw;
  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 int ocrdma_query_port(struct ib_device *ibdev,
 148                       u8 port, struct ib_port_attr *props)
 149 {
 150         enum ib_port_state port_state;
 151         struct ocrdma_dev *dev;
 152         struct net_device *netdev;
 153
 154         dev = get_ocrdma_dev(ibdev);
 155         if (port > 1) {
 156                 pr_err("%s(%d) invalid_port=0x%x\n", __func__,
 157                        dev->id, port);
 158                 return -EINVAL;
 159         }
 160         netdev = dev->nic_info.netdev;
 161         if (netif_running(netdev) && netif_oper_up(netdev)) {
 162                 port_state = IB_PORT_ACTIVE;
 163                 props->phys_state = 5;
 164         } else {
 165                 port_state = IB_PORT_DOWN;
 166                 props->phys_state = 3;
 167         }
 168         props->max_mtu = IB_MTU_4096;
 169         props->active_mtu = iboe_get_mtu(netdev->mtu);
 170         props->lid = 0;
 171         props->lmc = 0;
 172         props->sm_lid = 0;
 173         props->sm_sl = 0;
 174         props->state = port_state;
 175         props->port_cap_flags =
 176             IB_PORT_CM_SUP |
 177             IB_PORT_REINIT_SUP |
 178             IB_PORT_DEVICE_MGMT_SUP | IB_PORT_VENDOR_CLASS_SUP | IB_PORT_IP_BASED_GIDS;
 179         props->gid_tbl_len = OCRDMA_MAX_SGID;
 180         props->pkey_tbl_len = 1;
 181         props->bad_pkey_cntr = 0;
 182         props->qkey_viol_cntr = 0;
 183         get_link_speed_and_width(dev, &props->active_speed,
 184                                  &props->active_width);
 185         props->max_msg_sz = 0x80000000;
 186         props->max_vl_num = 4;
 187         return 0;
 188 }
 189
 190 int ocrdma_modify_port(struct ib_device *ibdev, u8 port, int mask,
 191                        struct ib_port_modify *props)
 192 {
 193         struct ocrdma_dev *dev;
 194
 195         dev = get_ocrdma_dev(ibdev);
 196         if (port > 1) {
 197                 pr_err("%s(%d) invalid_port=0x%x\n", __func__, dev->id, port);
 198                 return -EINVAL;
 199         }
 200         return 0;
 201 }
 202
 203 static int ocrdma_add_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
 204                            unsigned long len)
 205 {
 206         struct ocrdma_mm *mm;
 207
 208         mm = kzalloc(sizeof(*mm), GFP_KERNEL);
 209         if (mm == NULL)
 210                 return -ENOMEM;
 211         mm->key.phy_addr = phy_addr;
 212         mm->key.len = len;
 213         INIT_LIST_HEAD(&mm->entry);
 214
 215         mutex_lock(&uctx->mm_list_lock);
 216         list_add_tail(&mm->entry, &uctx->mm_head);
 217         mutex_unlock(&uctx->mm_list_lock);
 218         return 0;
 219 }
 220
 221 static void ocrdma_del_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
 222                             unsigned long len)
 223 {
 224         struct ocrdma_mm *mm, *tmp;
 225
 226         mutex_lock(&uctx->mm_list_lock);
 227         list_for_each_entry_safe(mm, tmp, &uctx->mm_head, entry) {
 228                 if (len != mm->key.len && phy_addr != mm->key.phy_addr)
 229                         continue;
 230
 231                 list_del(&mm->entry);
 232                 kfree(mm);
 233                 break;
 234         }
 235         mutex_unlock(&uctx->mm_list_lock);
 236 }
 237
 238 static bool ocrdma_search_mmap(struct ocrdma_ucontext *uctx, u64 phy_addr,
 239                               unsigned long len)
 240 {
 241         bool found = false;
 242         struct ocrdma_mm *mm;
 243
 244         mutex_lock(&uctx->mm_list_lock);
 245         list_for_each_entry(mm, &uctx->mm_head, entry) {
 246                 if (len != mm->key.len && phy_addr != mm->key.phy_addr)
 247                         continue;
 248
 249                 found = true;
 250                 break;
 251         }
 252         mutex_unlock(&uctx->mm_list_lock);
 253         return found;
 254 }
 255
 256 static struct ocrdma_pd *_ocrdma_alloc_pd(struct ocrdma_dev *dev,
 257                                           struct ocrdma_ucontext *uctx,
 258                                           struct ib_udata *udata)
 259 {
 260         struct ocrdma_pd *pd = NULL;
 261         int status = 0;
 262
 263         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 264         if (!pd)
 265                 return ERR_PTR(-ENOMEM);
 266
 267         if (udata && uctx) {
 268                 pd->dpp_enabled =
 269                         ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R;
 270                 pd->num_dpp_qp =
 271                         pd->dpp_enabled ? (dev->nic_info.db_page_size /
 272                                            dev->attr.wqe_size) : 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 scatterlist *sg;
 730         struct ocrdma_pbl *pbl_tbl = mr->hwmr.pbl_table;
 731         struct ib_umem *umem = mr->umem;
 732         int shift, pg_cnt, pages, pbe_cnt, entry, 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         for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
 743                 pages = sg_dma_len(sg) >> shift;
 744                 for (pg_cnt = 0; pg_cnt < pages; pg_cnt++) {
 745                         /* store the page address in pbe */
 746                         pbe->pa_lo =
 747                             cpu_to_le32(sg_dma_address
 748                                         (sg) +
 749                                         (umem->page_size * pg_cnt));
 750                         pbe->pa_hi =
 751                             cpu_to_le32(upper_32_bits
 752                                         ((sg_dma_address
 753                                           (sg) +
 754                                           umem->page_size * pg_cnt)));
 755                         pbe_cnt += 1;
 756                         total_num_pbes += 1;
 757                         pbe++;
 758
 759                         /* if done building pbes, issue the mbx cmd. */
 760                         if (total_num_pbes == num_pbes)
 761                                 return;
 762
 763                         /* if the given pbl is full storing the pbes,
 764                          * move to next pbl.
 765                          */
 766                         if (pbe_cnt ==
 767                                 (mr->hwmr.pbl_size / sizeof(u64))) {
 768                                 pbl_tbl++;
 769                                 pbe = (struct ocrdma_pbe *)pbl_tbl->va;
 770                                 pbe_cnt = 0;
 771                         }
 772
 773                 }
 774         }
 775 }
 776
 777 struct ib_mr *ocrdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
 778                                  u64 usr_addr, int acc, struct ib_udata *udata)
 779 {
 780         int status = -ENOMEM;
 781         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
 782         struct ocrdma_mr *mr;
 783         struct ocrdma_pd *pd;
 784         u32 num_pbes;
 785
 786         pd = get_ocrdma_pd(ibpd);
 787
 788         if (acc & IB_ACCESS_REMOTE_WRITE && !(acc & IB_ACCESS_LOCAL_WRITE))
 789                 return ERR_PTR(-EINVAL);
 790
 791         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
 792         if (!mr)
 793                 return ERR_PTR(status);
 794         mr->umem = ib_umem_get(ibpd->uobject->context, start, len, acc, 0);
 795         if (IS_ERR(mr->umem)) {
 796                 status = -EFAULT;
 797                 goto umem_err;
 798         }
 799         num_pbes = ib_umem_page_count(mr->umem);
 800         status = ocrdma_get_pbl_info(dev, mr, num_pbes);
 801         if (status)
 802                 goto umem_err;
 803
 804         mr->hwmr.pbe_size = mr->umem->page_size;
 805         mr->hwmr.fbo = mr->umem->offset;
 806         mr->hwmr.va = usr_addr;
 807         mr->hwmr.len = len;
 808         mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
 809         mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
 810         mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
 811         mr->hwmr.local_rd = 1;
 812         mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
 813         status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
 814         if (status)
 815                 goto umem_err;
 816         build_user_pbes(dev, mr, num_pbes);
 817         status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, acc);
 818         if (status)
 819                 goto mbx_err;
 820         mr->ibmr.lkey = mr->hwmr.lkey;
 821         if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
 822                 mr->ibmr.rkey = mr->hwmr.lkey;
 823
 824         return &mr->ibmr;
 825
 826 mbx_err:
 827         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
 828 umem_err:
 829         kfree(mr);
 830         return ERR_PTR(status);
 831 }
 832
 833 int ocrdma_dereg_mr(struct ib_mr *ib_mr)
 834 {
 835         struct ocrdma_mr *mr = get_ocrdma_mr(ib_mr);
 836         struct ocrdma_dev *dev = get_ocrdma_dev(ib_mr->device);
 837         int status;
 838
 839         status = ocrdma_mbx_dealloc_lkey(dev, mr->hwmr.fr_mr, mr->hwmr.lkey);
 840
 841         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
 842
 843         /* it could be user registered memory. */
 844         if (mr->umem)
 845                 ib_umem_release(mr->umem);
 846         kfree(mr);
 847         return status;
 848 }
 849
 850 static int ocrdma_copy_cq_uresp(struct ocrdma_dev *dev, struct ocrdma_cq *cq,
 851                                 struct ib_udata *udata,
 852                                 struct ib_ucontext *ib_ctx)
 853 {
 854         int status;
 855         struct ocrdma_ucontext *uctx = get_ocrdma_ucontext(ib_ctx);
 856         struct ocrdma_create_cq_uresp uresp;
 857
 858         memset(&uresp, 0, sizeof(uresp));
 859         uresp.cq_id = cq->id;
 860         uresp.page_size = PAGE_ALIGN(cq->len);
 861         uresp.num_pages = 1;
 862         uresp.max_hw_cqe = cq->max_hw_cqe;
 863         uresp.page_addr[0] = cq->pa;
 864         uresp.db_page_addr =  ocrdma_get_db_addr(dev, uctx->cntxt_pd->id);
 865         uresp.db_page_size = dev->nic_info.db_page_size;
 866         uresp.phase_change = cq->phase_change ? 1 : 0;
 867         status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
 868         if (status) {
 869                 pr_err("%s(%d) copy error cqid=0x%x.\n",
 870                        __func__, dev->id, cq->id);
 871                 goto err;
 872         }
 873         status = ocrdma_add_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
 874         if (status)
 875                 goto err;
 876         status = ocrdma_add_mmap(uctx, uresp.page_addr[0], uresp.page_size);
 877         if (status) {
 878                 ocrdma_del_mmap(uctx, uresp.db_page_addr, uresp.db_page_size);
 879                 goto err;
 880         }
 881         cq->ucontext = uctx;
 882 err:
 883         return status;
 884 }
 885
 886 struct ib_cq *ocrdma_create_cq(struct ib_device *ibdev, int entries, int vector,
 887                                struct ib_ucontext *ib_ctx,
 888                                struct ib_udata *udata)
 889 {
 890         struct ocrdma_cq *cq;
 891         struct ocrdma_dev *dev = get_ocrdma_dev(ibdev);
 892         struct ocrdma_ucontext *uctx = NULL;
 893         u16 pd_id = 0;
 894         int status;
 895         struct ocrdma_create_cq_ureq ureq;
 896
 897         if (udata) {
 898                 if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
 899                         return ERR_PTR(-EFAULT);
 900         } else
 901                 ureq.dpp_cq = 0;
 902         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 903         if (!cq)
 904                 return ERR_PTR(-ENOMEM);
 905
 906         spin_lock_init(&cq->cq_lock);
 907         spin_lock_init(&cq->comp_handler_lock);
 908         INIT_LIST_HEAD(&cq->sq_head);
 909         INIT_LIST_HEAD(&cq->rq_head);
 910         cq->first_arm = true;
 911
 912         if (ib_ctx) {
 913                 uctx = get_ocrdma_ucontext(ib_ctx);
 914                 pd_id = uctx->cntxt_pd->id;
 915         }
 916
 917         status = ocrdma_mbx_create_cq(dev, cq, entries, ureq.dpp_cq, pd_id);
 918         if (status) {
 919                 kfree(cq);
 920                 return ERR_PTR(status);
 921         }
 922         if (ib_ctx) {
 923                 status = ocrdma_copy_cq_uresp(dev, cq, udata, ib_ctx);
 924                 if (status)
 925                         goto ctx_err;
 926         }
 927         cq->phase = OCRDMA_CQE_VALID;
 928         dev->cq_tbl[cq->id] = cq;
 929         return &cq->ibcq;
 930
 931 ctx_err:
 932         ocrdma_mbx_destroy_cq(dev, cq);
 933         kfree(cq);
 934         return ERR_PTR(status);
 935 }
 936
 937 int ocrdma_resize_cq(struct ib_cq *ibcq, int new_cnt,
 938                      struct ib_udata *udata)
 939 {
 940         int status = 0;
 941         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
 942
 943         if (new_cnt < 1 || new_cnt > cq->max_hw_cqe) {
 944                 status = -EINVAL;
 945                 return status;
 946         }
 947         ibcq->cqe = new_cnt;
 948         return status;
 949 }
 950
 951 static void ocrdma_flush_cq(struct ocrdma_cq *cq)
 952 {
 953         int cqe_cnt;
 954         int valid_count = 0;
 955         unsigned long flags;
 956
 957         struct ocrdma_dev *dev = get_ocrdma_dev(cq->ibcq.device);
 958         struct ocrdma_cqe *cqe = NULL;
 959
 960         cqe = cq->va;
 961         cqe_cnt = cq->cqe_cnt;
 962
 963         /* Last irq might have scheduled a polling thread
 964          * sync-up with it before hard flushing.
 965          */
 966         spin_lock_irqsave(&cq->cq_lock, flags);
 967         while (cqe_cnt) {
 968                 if (is_cqe_valid(cq, cqe))
 969                         valid_count++;
 970                 cqe++;
 971                 cqe_cnt--;
 972         }
 973         ocrdma_ring_cq_db(dev, cq->id, false, false, valid_count);
 974         spin_unlock_irqrestore(&cq->cq_lock, flags);
 975 }
 976
 977 int ocrdma_destroy_cq(struct ib_cq *ibcq)
 978 {
 979         int status;
 980         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
 981         struct ocrdma_eq *eq = NULL;
 982         struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
 983         int pdid = 0;
 984         u32 irq, indx;
 985
 986         dev->cq_tbl[cq->id] = NULL;
 987         indx = ocrdma_get_eq_table_index(dev, cq->eqn);
 988         if (indx == -EINVAL)
 989                 BUG();
 990
 991         eq = &dev->eq_tbl[indx];
 992         irq = ocrdma_get_irq(dev, eq);
 993         synchronize_irq(irq);
 994         ocrdma_flush_cq(cq);
 995
 996         status = ocrdma_mbx_destroy_cq(dev, cq);
 997         if (cq->ucontext) {
 998                 pdid = cq->ucontext->cntxt_pd->id;
 999                 ocrdma_del_mmap(cq->ucontext, (u64) cq->pa,
1000                                 PAGE_ALIGN(cq->len));
1001                 ocrdma_del_mmap(cq->ucontext,
1002                                 ocrdma_get_db_addr(dev, pdid),
1003                                 dev->nic_info.db_page_size);
1004         }
1005
1006         kfree(cq);
1007         return status;
1008 }
1009
1010 static int ocrdma_add_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
1011 {
1012         int status = -EINVAL;
1013
1014         if (qp->id < OCRDMA_MAX_QP && dev->qp_tbl[qp->id] == NULL) {
1015                 dev->qp_tbl[qp->id] = qp;
1016                 status = 0;
1017         }
1018         return status;
1019 }
1020
1021 static void ocrdma_del_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
1022 {
1023         dev->qp_tbl[qp->id] = NULL;
1024 }
1025
1026 static int ocrdma_check_qp_params(struct ib_pd *ibpd, struct ocrdma_dev *dev,
1027                                   struct ib_qp_init_attr *attrs)
1028 {
1029         if ((attrs->qp_type != IB_QPT_GSI) &&
1030             (attrs->qp_type != IB_QPT_RC) &&
1031             (attrs->qp_type != IB_QPT_UC) &&
1032             (attrs->qp_type != IB_QPT_UD)) {
1033                 pr_err("%s(%d) unsupported qp type=0x%x requested\n",
1034                        __func__, dev->id, attrs->qp_type);
1035                 return -EINVAL;
1036         }
1037         /* Skip the check for QP1 to support CM size of 128 */
1038         if ((attrs->qp_type != IB_QPT_GSI) &&
1039             (attrs->cap.max_send_wr > dev->attr.max_wqe)) {
1040                 pr_err("%s(%d) unsupported send_wr=0x%x requested\n",
1041                        __func__, dev->id, attrs->cap.max_send_wr);
1042                 pr_err("%s(%d) supported send_wr=0x%x\n",
1043                        __func__, dev->id, dev->attr.max_wqe);
1044                 return -EINVAL;
1045         }
1046         if (!attrs->srq && (attrs->cap.max_recv_wr > dev->attr.max_rqe)) {
1047                 pr_err("%s(%d) unsupported recv_wr=0x%x requested\n",
1048                        __func__, dev->id, attrs->cap.max_recv_wr);
1049                 pr_err("%s(%d) supported recv_wr=0x%x\n",
1050                        __func__, dev->id, dev->attr.max_rqe);
1051                 return -EINVAL;
1052         }
1053         if (attrs->cap.max_inline_data > dev->attr.max_inline_data) {
1054                 pr_err("%s(%d) unsupported inline data size=0x%x requested\n",
1055                        __func__, dev->id, attrs->cap.max_inline_data);
1056                 pr_err("%s(%d) supported inline data size=0x%x\n",
1057                        __func__, dev->id, dev->attr.max_inline_data);
1058                 return -EINVAL;
1059         }
1060         if (attrs->cap.max_send_sge > dev->attr.max_send_sge) {
1061                 pr_err("%s(%d) unsupported send_sge=0x%x requested\n",
1062                        __func__, dev->id, attrs->cap.max_send_sge);
1063                 pr_err("%s(%d) supported send_sge=0x%x\n",
1064                        __func__, dev->id, dev->attr.max_send_sge);
1065                 return -EINVAL;
1066         }
1067         if (attrs->cap.max_recv_sge > dev->attr.max_recv_sge) {
1068                 pr_err("%s(%d) unsupported recv_sge=0x%x requested\n",
1069                        __func__, dev->id, attrs->cap.max_recv_sge);
1070                 pr_err("%s(%d) supported recv_sge=0x%x\n",
1071                        __func__, dev->id, dev->attr.max_recv_sge);
1072                 return -EINVAL;
1073         }
1074         /* unprivileged user space cannot create special QP */
1075         if (ibpd->uobject && attrs->qp_type == IB_QPT_GSI) {
1076                 pr_err
1077                     ("%s(%d) Userspace can't create special QPs of type=0x%x\n",
1078                      __func__, dev->id, attrs->qp_type);
1079                 return -EINVAL;
1080         }
1081         /* allow creating only one GSI type of QP */
1082         if (attrs->qp_type == IB_QPT_GSI && dev->gsi_qp_created) {
1083                 pr_err("%s(%d) GSI special QPs already created.\n",
1084                        __func__, dev->id);
1085                 return -EINVAL;
1086         }
1087         /* verify consumer QPs are not trying to use GSI QP's CQ */
1088         if ((attrs->qp_type != IB_QPT_GSI) && (dev->gsi_qp_created)) {
1089                 if ((dev->gsi_sqcq == get_ocrdma_cq(attrs->send_cq)) ||
1090                         (dev->gsi_rqcq == get_ocrdma_cq(attrs->recv_cq))) {
1091                         pr_err("%s(%d) Consumer QP cannot use GSI CQs.\n",
1092                                 __func__, dev->id);
1093                         return -EINVAL;
1094                 }
1095         }
1096         return 0;
1097 }
1098
1099 static int ocrdma_copy_qp_uresp(struct ocrdma_qp *qp,
1100                                 struct ib_udata *udata, int dpp_offset,
1101                                 int dpp_credit_lmt, int srq)
1102 {
1103         int status = 0;
1104         u64 usr_db;
1105         struct ocrdma_create_qp_uresp uresp;
1106         struct ocrdma_dev *dev = qp->dev;
1107         struct ocrdma_pd *pd = qp->pd;
1108
1109         memset(&uresp, 0, sizeof(uresp));
1110         usr_db = dev->nic_info.unmapped_db +
1111                         (pd->id * dev->nic_info.db_page_size);
1112         uresp.qp_id = qp->id;
1113         uresp.sq_dbid = qp->sq.dbid;
1114         uresp.num_sq_pages = 1;
1115         uresp.sq_page_size = PAGE_ALIGN(qp->sq.len);
1116         uresp.sq_page_addr[0] = qp->sq.pa;
1117         uresp.num_wqe_allocated = qp->sq.max_cnt;
1118         if (!srq) {
1119                 uresp.rq_dbid = qp->rq.dbid;
1120                 uresp.num_rq_pages = 1;
1121                 uresp.rq_page_size = PAGE_ALIGN(qp->rq.len);
1122                 uresp.rq_page_addr[0] = qp->rq.pa;
1123                 uresp.num_rqe_allocated = qp->rq.max_cnt;
1124         }
1125         uresp.db_page_addr = usr_db;
1126         uresp.db_page_size = dev->nic_info.db_page_size;
1127         uresp.db_sq_offset = OCRDMA_DB_GEN2_SQ_OFFSET;
1128         uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
1129         uresp.db_shift = OCRDMA_DB_RQ_SHIFT;
1130
1131         if (qp->dpp_enabled) {
1132                 uresp.dpp_credit = dpp_credit_lmt;
1133                 uresp.dpp_offset = dpp_offset;
1134         }
1135         status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
1136         if (status) {
1137                 pr_err("%s(%d) user copy error.\n", __func__, dev->id);
1138                 goto err;
1139         }
1140         status = ocrdma_add_mmap(pd->uctx, uresp.sq_page_addr[0],
1141                                  uresp.sq_page_size);
1142         if (status)
1143                 goto err;
1144
1145         if (!srq) {
1146                 status = ocrdma_add_mmap(pd->uctx, uresp.rq_page_addr[0],
1147                                          uresp.rq_page_size);
1148                 if (status)
1149                         goto rq_map_err;
1150         }
1151         return status;
1152 rq_map_err:
1153         ocrdma_del_mmap(pd->uctx, uresp.sq_page_addr[0], uresp.sq_page_size);
1154 err:
1155         return status;
1156 }
1157
1158 static void ocrdma_set_qp_db(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
1159                              struct ocrdma_pd *pd)
1160 {
1161         if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
1162                 qp->sq_db = dev->nic_info.db +
1163                         (pd->id * dev->nic_info.db_page_size) +
1164                         OCRDMA_DB_GEN2_SQ_OFFSET;
1165                 qp->rq_db = dev->nic_info.db +
1166                         (pd->id * dev->nic_info.db_page_size) +
1167                         OCRDMA_DB_GEN2_RQ_OFFSET;
1168         } else {
1169                 qp->sq_db = dev->nic_info.db +
1170                         (pd->id * dev->nic_info.db_page_size) +
1171                         OCRDMA_DB_SQ_OFFSET;
1172                 qp->rq_db = dev->nic_info.db +
1173                         (pd->id * dev->nic_info.db_page_size) +
1174                         OCRDMA_DB_RQ_OFFSET;
1175         }
1176 }
1177
1178 static int ocrdma_alloc_wr_id_tbl(struct ocrdma_qp *qp)
1179 {
1180         qp->wqe_wr_id_tbl =
1181             kzalloc(sizeof(*(qp->wqe_wr_id_tbl)) * qp->sq.max_cnt,
1182                     GFP_KERNEL);
1183         if (qp->wqe_wr_id_tbl == NULL)
1184                 return -ENOMEM;
1185         qp->rqe_wr_id_tbl =
1186             kzalloc(sizeof(u64) * qp->rq.max_cnt, GFP_KERNEL);
1187         if (qp->rqe_wr_id_tbl == NULL)
1188                 return -ENOMEM;
1189
1190         return 0;
1191 }
1192
1193 static void ocrdma_set_qp_init_params(struct ocrdma_qp *qp,
1194                                       struct ocrdma_pd *pd,
1195                                       struct ib_qp_init_attr *attrs)
1196 {
1197         qp->pd = pd;
1198         spin_lock_init(&qp->q_lock);
1199         INIT_LIST_HEAD(&qp->sq_entry);
1200         INIT_LIST_HEAD(&qp->rq_entry);
1201
1202         qp->qp_type = attrs->qp_type;
1203         qp->cap_flags = OCRDMA_QP_INB_RD | OCRDMA_QP_INB_WR;
1204         qp->max_inline_data = attrs->cap.max_inline_data;
1205         qp->sq.max_sges = attrs->cap.max_send_sge;
1206         qp->rq.max_sges = attrs->cap.max_recv_sge;
1207         qp->state = OCRDMA_QPS_RST;
1208         qp->signaled = (attrs->sq_sig_type == IB_SIGNAL_ALL_WR) ? true : false;
1209 }
1210
1211 static void ocrdma_store_gsi_qp_cq(struct ocrdma_dev *dev,
1212                                    struct ib_qp_init_attr *attrs)
1213 {
1214         if (attrs->qp_type == IB_QPT_GSI) {
1215                 dev->gsi_qp_created = 1;
1216                 dev->gsi_sqcq = get_ocrdma_cq(attrs->send_cq);
1217                 dev->gsi_rqcq = get_ocrdma_cq(attrs->recv_cq);
1218         }
1219 }
1220
1221 struct ib_qp *ocrdma_create_qp(struct ib_pd *ibpd,
1222                                struct ib_qp_init_attr *attrs,
1223                                struct ib_udata *udata)
1224 {
1225         int status;
1226         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
1227         struct ocrdma_qp *qp;
1228         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
1229         struct ocrdma_create_qp_ureq ureq;
1230         u16 dpp_credit_lmt, dpp_offset;
1231
1232         status = ocrdma_check_qp_params(ibpd, dev, attrs);
1233         if (status)
1234                 goto gen_err;
1235
1236         memset(&ureq, 0, sizeof(ureq));
1237         if (udata) {
1238                 if (ib_copy_from_udata(&ureq, udata, sizeof(ureq)))
1239                         return ERR_PTR(-EFAULT);
1240         }
1241         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
1242         if (!qp) {
1243                 status = -ENOMEM;
1244                 goto gen_err;
1245         }
1246         qp->dev = dev;
1247         ocrdma_set_qp_init_params(qp, pd, attrs);
1248         if (udata == NULL)
1249                 qp->cap_flags |= (OCRDMA_QP_MW_BIND | OCRDMA_QP_LKEY0 |
1250                                         OCRDMA_QP_FAST_REG);
1251
1252         mutex_lock(&dev->dev_lock);
1253         status = ocrdma_mbx_create_qp(qp, attrs, ureq.enable_dpp_cq,
1254                                         ureq.dpp_cq_id,
1255                                         &dpp_offset, &dpp_credit_lmt);
1256         if (status)
1257                 goto mbx_err;
1258
1259         /* user space QP's wr_id table are managed in library */
1260         if (udata == NULL) {
1261                 status = ocrdma_alloc_wr_id_tbl(qp);
1262                 if (status)
1263                         goto map_err;
1264         }
1265
1266         status = ocrdma_add_qpn_map(dev, qp);
1267         if (status)
1268                 goto map_err;
1269         ocrdma_set_qp_db(dev, qp, pd);
1270         if (udata) {
1271                 status = ocrdma_copy_qp_uresp(qp, udata, dpp_offset,
1272                                               dpp_credit_lmt,
1273                                               (attrs->srq != NULL));
1274                 if (status)
1275                         goto cpy_err;
1276         }
1277         ocrdma_store_gsi_qp_cq(dev, attrs);
1278         qp->ibqp.qp_num = qp->id;
1279         mutex_unlock(&dev->dev_lock);
1280         return &qp->ibqp;
1281
1282 cpy_err:
1283         ocrdma_del_qpn_map(dev, qp);
1284 map_err:
1285         ocrdma_mbx_destroy_qp(dev, qp);
1286 mbx_err:
1287         mutex_unlock(&dev->dev_lock);
1288         kfree(qp->wqe_wr_id_tbl);
1289         kfree(qp->rqe_wr_id_tbl);
1290         kfree(qp);
1291         pr_err("%s(%d) error=%d\n", __func__, dev->id, status);
1292 gen_err:
1293         return ERR_PTR(status);
1294 }
1295
1296 int _ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1297                       int attr_mask)
1298 {
1299         int status = 0;
1300         struct ocrdma_qp *qp;
1301         struct ocrdma_dev *dev;
1302         enum ib_qp_state old_qps;
1303
1304         qp = get_ocrdma_qp(ibqp);
1305         dev = qp->dev;
1306         if (attr_mask & IB_QP_STATE)
1307                 status = ocrdma_qp_state_change(qp, attr->qp_state, &old_qps);
1308         /* if new and previous states are same hw doesn't need to
1309          * know about it.
1310          */
1311         if (status < 0)
1312                 return status;
1313         status = ocrdma_mbx_modify_qp(dev, qp, attr, attr_mask);
1314
1315         return status;
1316 }
1317
1318 int ocrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1319                      int attr_mask, struct ib_udata *udata)
1320 {
1321         unsigned long flags;
1322         int status = -EINVAL;
1323         struct ocrdma_qp *qp;
1324         struct ocrdma_dev *dev;
1325         enum ib_qp_state old_qps, new_qps;
1326
1327         qp = get_ocrdma_qp(ibqp);
1328         dev = qp->dev;
1329
1330         /* syncronize with multiple context trying to change, retrive qps */
1331         mutex_lock(&dev->dev_lock);
1332         /* syncronize with wqe, rqe posting and cqe processing contexts */
1333         spin_lock_irqsave(&qp->q_lock, flags);
1334         old_qps = get_ibqp_state(qp->state);
1335         if (attr_mask & IB_QP_STATE)
1336                 new_qps = attr->qp_state;
1337         else
1338                 new_qps = old_qps;
1339         spin_unlock_irqrestore(&qp->q_lock, flags);
1340
1341         if (!ib_modify_qp_is_ok(old_qps, new_qps, ibqp->qp_type, attr_mask,
1342                                 IB_LINK_LAYER_ETHERNET)) {
1343                 pr_err("%s(%d) invalid attribute mask=0x%x specified for\n"
1344                        "qpn=0x%x of type=0x%x old_qps=0x%x, new_qps=0x%x\n",
1345                        __func__, dev->id, attr_mask, qp->id, ibqp->qp_type,
1346                        old_qps, new_qps);
1347                 goto param_err;
1348         }
1349
1350         status = _ocrdma_modify_qp(ibqp, attr, attr_mask);
1351         if (status > 0)
1352                 status = 0;
1353 param_err:
1354         mutex_unlock(&dev->dev_lock);
1355         return status;
1356 }
1357
1358 static enum ib_mtu ocrdma_mtu_int_to_enum(u16 mtu)
1359 {
1360         switch (mtu) {
1361         case 256:
1362                 return IB_MTU_256;
1363         case 512:
1364                 return IB_MTU_512;
1365         case 1024:
1366                 return IB_MTU_1024;
1367         case 2048:
1368                 return IB_MTU_2048;
1369         case 4096:
1370                 return IB_MTU_4096;
1371         default:
1372                 return IB_MTU_1024;
1373         }
1374 }
1375
1376 static int ocrdma_to_ib_qp_acc_flags(int qp_cap_flags)
1377 {
1378         int ib_qp_acc_flags = 0;
1379
1380         if (qp_cap_flags & OCRDMA_QP_INB_WR)
1381                 ib_qp_acc_flags |= IB_ACCESS_REMOTE_WRITE;
1382         if (qp_cap_flags & OCRDMA_QP_INB_RD)
1383                 ib_qp_acc_flags |= IB_ACCESS_LOCAL_WRITE;
1384         return ib_qp_acc_flags;
1385 }
1386
1387 int ocrdma_query_qp(struct ib_qp *ibqp,
1388                     struct ib_qp_attr *qp_attr,
1389                     int attr_mask, struct ib_qp_init_attr *qp_init_attr)
1390 {
1391         int status;
1392         u32 qp_state;
1393         struct ocrdma_qp_params params;
1394         struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
1395         struct ocrdma_dev *dev = qp->dev;
1396
1397         memset(&params, 0, sizeof(params));
1398         mutex_lock(&dev->dev_lock);
1399         status = ocrdma_mbx_query_qp(dev, qp, &params);
1400         mutex_unlock(&dev->dev_lock);
1401         if (status)
1402                 goto mbx_err;
1403         qp_attr->qp_state = get_ibqp_state(IB_QPS_INIT);
1404         qp_attr->cur_qp_state = get_ibqp_state(IB_QPS_INIT);
1405         qp_attr->path_mtu =
1406                 ocrdma_mtu_int_to_enum(params.path_mtu_pkey_indx &
1407                                 OCRDMA_QP_PARAMS_PATH_MTU_MASK) >>
1408                                 OCRDMA_QP_PARAMS_PATH_MTU_SHIFT;
1409         qp_attr->path_mig_state = IB_MIG_MIGRATED;
1410         qp_attr->rq_psn = params.hop_lmt_rq_psn & OCRDMA_QP_PARAMS_RQ_PSN_MASK;
1411         qp_attr->sq_psn = params.tclass_sq_psn & OCRDMA_QP_PARAMS_SQ_PSN_MASK;
1412         qp_attr->dest_qp_num =
1413             params.ack_to_rnr_rtc_dest_qpn & OCRDMA_QP_PARAMS_DEST_QPN_MASK;
1414
1415         qp_attr->qp_access_flags = ocrdma_to_ib_qp_acc_flags(qp->cap_flags);
1416         qp_attr->cap.max_send_wr = qp->sq.max_cnt - 1;
1417         qp_attr->cap.max_recv_wr = qp->rq.max_cnt - 1;
1418         qp_attr->cap.max_send_sge = qp->sq.max_sges;
1419         qp_attr->cap.max_recv_sge = qp->rq.max_sges;
1420         qp_attr->cap.max_inline_data = qp->max_inline_data;
1421         qp_init_attr->cap = qp_attr->cap;
1422         memcpy(&qp_attr->ah_attr.grh.dgid, &params.dgid[0],
1423                sizeof(params.dgid));
1424         qp_attr->ah_attr.grh.flow_label = params.rnt_rc_sl_fl &
1425             OCRDMA_QP_PARAMS_FLOW_LABEL_MASK;
1426         qp_attr->ah_attr.grh.sgid_index = qp->sgid_idx;
1427         qp_attr->ah_attr.grh.hop_limit = (params.hop_lmt_rq_psn &
1428                                           OCRDMA_QP_PARAMS_HOP_LMT_MASK) >>
1429                                                 OCRDMA_QP_PARAMS_HOP_LMT_SHIFT;
1430         qp_attr->ah_attr.grh.traffic_class = (params.tclass_sq_psn &
1431                                               OCRDMA_QP_PARAMS_TCLASS_MASK) >>
1432                                                 OCRDMA_QP_PARAMS_TCLASS_SHIFT;
1433
1434         qp_attr->ah_attr.ah_flags = IB_AH_GRH;
1435         qp_attr->ah_attr.port_num = 1;
1436         qp_attr->ah_attr.sl = (params.rnt_rc_sl_fl &
1437                                OCRDMA_QP_PARAMS_SL_MASK) >>
1438                                 OCRDMA_QP_PARAMS_SL_SHIFT;
1439         qp_attr->timeout = (params.ack_to_rnr_rtc_dest_qpn &
1440                             OCRDMA_QP_PARAMS_ACK_TIMEOUT_MASK) >>
1441                                 OCRDMA_QP_PARAMS_ACK_TIMEOUT_SHIFT;
1442         qp_attr->rnr_retry = (params.ack_to_rnr_rtc_dest_qpn &
1443                               OCRDMA_QP_PARAMS_RNR_RETRY_CNT_MASK) >>
1444                                 OCRDMA_QP_PARAMS_RNR_RETRY_CNT_SHIFT;
1445         qp_attr->retry_cnt =
1446             (params.rnt_rc_sl_fl & OCRDMA_QP_PARAMS_RETRY_CNT_MASK) >>
1447                 OCRDMA_QP_PARAMS_RETRY_CNT_SHIFT;
1448         qp_attr->min_rnr_timer = 0;
1449         qp_attr->pkey_index = 0;
1450         qp_attr->port_num = 1;
1451         qp_attr->ah_attr.src_path_bits = 0;
1452         qp_attr->ah_attr.static_rate = 0;
1453         qp_attr->alt_pkey_index = 0;
1454         qp_attr->alt_port_num = 0;
1455         qp_attr->alt_timeout = 0;
1456         memset(&qp_attr->alt_ah_attr, 0, sizeof(qp_attr->alt_ah_attr));
1457         qp_state = (params.max_sge_recv_flags & OCRDMA_QP_PARAMS_STATE_MASK) >>
1458                     OCRDMA_QP_PARAMS_STATE_SHIFT;
1459         qp_attr->sq_draining = (qp_state == OCRDMA_QPS_SQ_DRAINING) ? 1 : 0;
1460         qp_attr->max_dest_rd_atomic =
1461             params.max_ord_ird >> OCRDMA_QP_PARAMS_MAX_ORD_SHIFT;
1462         qp_attr->max_rd_atomic =
1463             params.max_ord_ird & OCRDMA_QP_PARAMS_MAX_IRD_MASK;
1464         qp_attr->en_sqd_async_notify = (params.max_sge_recv_flags &
1465                                 OCRDMA_QP_PARAMS_FLAGS_SQD_ASYNC) ? 1 : 0;
1466 mbx_err:
1467         return status;
1468 }
1469
1470 static void ocrdma_srq_toggle_bit(struct ocrdma_srq *srq, int idx)
1471 {
1472         int i = idx / 32;
1473         unsigned int mask = (1 << (idx % 32));
1474
1475         if (srq->idx_bit_fields[i] & mask)
1476                 srq->idx_bit_fields[i] &= ~mask;
1477         else
1478                 srq->idx_bit_fields[i] |= mask;
1479 }
1480
1481 static int ocrdma_hwq_free_cnt(struct ocrdma_qp_hwq_info *q)
1482 {
1483         return ((q->max_wqe_idx - q->head) + q->tail) % q->max_cnt;
1484 }
1485
1486 static int is_hw_sq_empty(struct ocrdma_qp *qp)
1487 {
1488         return (qp->sq.tail == qp->sq.head);
1489 }
1490
1491 static int is_hw_rq_empty(struct ocrdma_qp *qp)
1492 {
1493         return (qp->rq.tail == qp->rq.head);
1494 }
1495
1496 static void *ocrdma_hwq_head(struct ocrdma_qp_hwq_info *q)
1497 {
1498         return q->va + (q->head * q->entry_size);
1499 }
1500
1501 static void *ocrdma_hwq_head_from_idx(struct ocrdma_qp_hwq_info *q,
1502                                       u32 idx)
1503 {
1504         return q->va + (idx * q->entry_size);
1505 }
1506
1507 static void ocrdma_hwq_inc_head(struct ocrdma_qp_hwq_info *q)
1508 {
1509         q->head = (q->head + 1) & q->max_wqe_idx;
1510 }
1511
1512 static void ocrdma_hwq_inc_tail(struct ocrdma_qp_hwq_info *q)
1513 {
1514         q->tail = (q->tail + 1) & q->max_wqe_idx;
1515 }
1516
1517 /* discard the cqe for a given QP */
1518 static void ocrdma_discard_cqes(struct ocrdma_qp *qp, struct ocrdma_cq *cq)
1519 {
1520         unsigned long cq_flags;
1521         unsigned long flags;
1522         int discard_cnt = 0;
1523         u32 cur_getp, stop_getp;
1524         struct ocrdma_cqe *cqe;
1525         u32 qpn = 0, wqe_idx = 0;
1526
1527         spin_lock_irqsave(&cq->cq_lock, cq_flags);
1528
1529         /* traverse through the CQEs in the hw CQ,
1530          * find the matching CQE for a given qp,
1531          * mark the matching one discarded by clearing qpn.
1532          * ring the doorbell in the poll_cq() as
1533          * we don't complete out of order cqe.
1534          */
1535
1536         cur_getp = cq->getp;
1537         /* find upto when do we reap the cq. */
1538         stop_getp = cur_getp;
1539         do {
1540                 if (is_hw_sq_empty(qp) && (!qp->srq && is_hw_rq_empty(qp)))
1541                         break;
1542
1543                 cqe = cq->va + cur_getp;
1544                 /* if (a) done reaping whole hw cq, or
1545                  *    (b) qp_xq becomes empty.
1546                  * then exit
1547                  */
1548                 qpn = cqe->cmn.qpn & OCRDMA_CQE_QPN_MASK;
1549                 /* if previously discarded cqe found, skip that too. */
1550                 /* check for matching qp */
1551                 if (qpn == 0 || qpn != qp->id)
1552                         goto skip_cqe;
1553
1554                 if (is_cqe_for_sq(cqe)) {
1555                         ocrdma_hwq_inc_tail(&qp->sq);
1556                 } else {
1557                         if (qp->srq) {
1558                                 wqe_idx = (le32_to_cpu(cqe->rq.buftag_qpn) >>
1559                                         OCRDMA_CQE_BUFTAG_SHIFT) &
1560                                         qp->srq->rq.max_wqe_idx;
1561                                 if (wqe_idx < 1)
1562                                         BUG();
1563                                 spin_lock_irqsave(&qp->srq->q_lock, flags);
1564                                 ocrdma_hwq_inc_tail(&qp->srq->rq);
1565                                 ocrdma_srq_toggle_bit(qp->srq, wqe_idx - 1);
1566                                 spin_unlock_irqrestore(&qp->srq->q_lock, flags);
1567
1568                         } else {
1569                                 ocrdma_hwq_inc_tail(&qp->rq);
1570                         }
1571                 }
1572                 /* mark cqe discarded so that it is not picked up later
1573                  * in the poll_cq().
1574                  */
1575                 discard_cnt += 1;
1576                 cqe->cmn.qpn = 0;
1577 skip_cqe:
1578                 cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
1579         } while (cur_getp != stop_getp);
1580         spin_unlock_irqrestore(&cq->cq_lock, cq_flags);
1581 }
1582
1583 void ocrdma_del_flush_qp(struct ocrdma_qp *qp)
1584 {
1585         int found = false;
1586         unsigned long flags;
1587         struct ocrdma_dev *dev = qp->dev;
1588         /* sync with any active CQ poll */
1589
1590         spin_lock_irqsave(&dev->flush_q_lock, flags);
1591         found = ocrdma_is_qp_in_sq_flushlist(qp->sq_cq, qp);
1592         if (found)
1593                 list_del(&qp->sq_entry);
1594         if (!qp->srq) {
1595                 found = ocrdma_is_qp_in_rq_flushlist(qp->rq_cq, qp);
1596                 if (found)
1597                         list_del(&qp->rq_entry);
1598         }
1599         spin_unlock_irqrestore(&dev->flush_q_lock, flags);
1600 }
1601
1602 int ocrdma_destroy_qp(struct ib_qp *ibqp)
1603 {
1604         int status;
1605         struct ocrdma_pd *pd;
1606         struct ocrdma_qp *qp;
1607         struct ocrdma_dev *dev;
1608         struct ib_qp_attr attrs;
1609         int attr_mask = IB_QP_STATE;
1610         unsigned long flags;
1611
1612         qp = get_ocrdma_qp(ibqp);
1613         dev = qp->dev;
1614
1615         attrs.qp_state = IB_QPS_ERR;
1616         pd = qp->pd;
1617
1618         /* change the QP state to ERROR */
1619         _ocrdma_modify_qp(ibqp, &attrs, attr_mask);
1620
1621         /* ensure that CQEs for newly created QP (whose id may be same with
1622          * one which just getting destroyed are same), dont get
1623          * discarded until the old CQEs are discarded.
1624          */
1625         mutex_lock(&dev->dev_lock);
1626         status = ocrdma_mbx_destroy_qp(dev, qp);
1627
1628         /*
1629          * acquire CQ lock while destroy is in progress, in order to
1630          * protect against proessing in-flight CQEs for this QP.
1631          */
1632         spin_lock_irqsave(&qp->sq_cq->cq_lock, flags);
1633         if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
1634                 spin_lock(&qp->rq_cq->cq_lock);
1635
1636         ocrdma_del_qpn_map(dev, qp);
1637
1638         if (qp->rq_cq && (qp->rq_cq != qp->sq_cq))
1639                 spin_unlock(&qp->rq_cq->cq_lock);
1640         spin_unlock_irqrestore(&qp->sq_cq->cq_lock, flags);
1641
1642         if (!pd->uctx) {
1643                 ocrdma_discard_cqes(qp, qp->sq_cq);
1644                 ocrdma_discard_cqes(qp, qp->rq_cq);
1645         }
1646         mutex_unlock(&dev->dev_lock);
1647
1648         if (pd->uctx) {
1649                 ocrdma_del_mmap(pd->uctx, (u64) qp->sq.pa,
1650                                 PAGE_ALIGN(qp->sq.len));
1651                 if (!qp->srq)
1652                         ocrdma_del_mmap(pd->uctx, (u64) qp->rq.pa,
1653                                         PAGE_ALIGN(qp->rq.len));
1654         }
1655
1656         ocrdma_del_flush_qp(qp);
1657
1658         kfree(qp->wqe_wr_id_tbl);
1659         kfree(qp->rqe_wr_id_tbl);
1660         kfree(qp);
1661         return status;
1662 }
1663
1664 static int ocrdma_copy_srq_uresp(struct ocrdma_dev *dev, struct ocrdma_srq *srq,
1665                                 struct ib_udata *udata)
1666 {
1667         int status;
1668         struct ocrdma_create_srq_uresp uresp;
1669
1670         memset(&uresp, 0, sizeof(uresp));
1671         uresp.rq_dbid = srq->rq.dbid;
1672         uresp.num_rq_pages = 1;
1673         uresp.rq_page_addr[0] = srq->rq.pa;
1674         uresp.rq_page_size = srq->rq.len;
1675         uresp.db_page_addr = dev->nic_info.unmapped_db +
1676             (srq->pd->id * dev->nic_info.db_page_size);
1677         uresp.db_page_size = dev->nic_info.db_page_size;
1678         uresp.num_rqe_allocated = srq->rq.max_cnt;
1679         if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
1680                 uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
1681                 uresp.db_shift = 24;
1682         } else {
1683                 uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET;
1684                 uresp.db_shift = 16;
1685         }
1686
1687         status = ib_copy_to_udata(udata, &uresp, sizeof(uresp));
1688         if (status)
1689                 return status;
1690         status = ocrdma_add_mmap(srq->pd->uctx, uresp.rq_page_addr[0],
1691                                  uresp.rq_page_size);
1692         if (status)
1693                 return status;
1694         return status;
1695 }
1696
1697 struct ib_srq *ocrdma_create_srq(struct ib_pd *ibpd,
1698                                  struct ib_srq_init_attr *init_attr,
1699                                  struct ib_udata *udata)
1700 {
1701         int status = -ENOMEM;
1702         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
1703         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
1704         struct ocrdma_srq *srq;
1705
1706         if (init_attr->attr.max_sge > dev->attr.max_recv_sge)
1707                 return ERR_PTR(-EINVAL);
1708         if (init_attr->attr.max_wr > dev->attr.max_rqe)
1709                 return ERR_PTR(-EINVAL);
1710
1711         srq = kzalloc(sizeof(*srq), GFP_KERNEL);
1712         if (!srq)
1713                 return ERR_PTR(status);
1714
1715         spin_lock_init(&srq->q_lock);
1716         srq->pd = pd;
1717         srq->db = dev->nic_info.db + (pd->id * dev->nic_info.db_page_size);
1718         status = ocrdma_mbx_create_srq(dev, srq, init_attr, pd);
1719         if (status)
1720                 goto err;
1721
1722         if (udata == NULL) {
1723                 srq->rqe_wr_id_tbl = kzalloc(sizeof(u64) * srq->rq.max_cnt,
1724                             GFP_KERNEL);
1725                 if (srq->rqe_wr_id_tbl == NULL)
1726                         goto arm_err;
1727
1728                 srq->bit_fields_len = (srq->rq.max_cnt / 32) +
1729                     (srq->rq.max_cnt % 32 ? 1 : 0);
1730                 srq->idx_bit_fields =
1731                     kmalloc(srq->bit_fields_len * sizeof(u32), GFP_KERNEL);
1732                 if (srq->idx_bit_fields == NULL)
1733                         goto arm_err;
1734                 memset(srq->idx_bit_fields, 0xff,
1735                        srq->bit_fields_len * sizeof(u32));
1736         }
1737
1738         if (init_attr->attr.srq_limit) {
1739                 status = ocrdma_mbx_modify_srq(srq, &init_attr->attr);
1740                 if (status)
1741                         goto arm_err;
1742         }
1743
1744         if (udata) {
1745                 status = ocrdma_copy_srq_uresp(dev, srq, udata);
1746                 if (status)
1747                         goto arm_err;
1748         }
1749
1750         return &srq->ibsrq;
1751
1752 arm_err:
1753         ocrdma_mbx_destroy_srq(dev, srq);
1754 err:
1755         kfree(srq->rqe_wr_id_tbl);
1756         kfree(srq->idx_bit_fields);
1757         kfree(srq);
1758         return ERR_PTR(status);
1759 }
1760
1761 int ocrdma_modify_srq(struct ib_srq *ibsrq,
1762                       struct ib_srq_attr *srq_attr,
1763                       enum ib_srq_attr_mask srq_attr_mask,
1764                       struct ib_udata *udata)
1765 {
1766         int status = 0;
1767         struct ocrdma_srq *srq;
1768
1769         srq = get_ocrdma_srq(ibsrq);
1770         if (srq_attr_mask & IB_SRQ_MAX_WR)
1771                 status = -EINVAL;
1772         else
1773                 status = ocrdma_mbx_modify_srq(srq, srq_attr);
1774         return status;
1775 }
1776
1777 int ocrdma_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
1778 {
1779         int status;
1780         struct ocrdma_srq *srq;
1781
1782         srq = get_ocrdma_srq(ibsrq);
1783         status = ocrdma_mbx_query_srq(srq, srq_attr);
1784         return status;
1785 }
1786
1787 int ocrdma_destroy_srq(struct ib_srq *ibsrq)
1788 {
1789         int status;
1790         struct ocrdma_srq *srq;
1791         struct ocrdma_dev *dev = get_ocrdma_dev(ibsrq->device);
1792
1793         srq = get_ocrdma_srq(ibsrq);
1794
1795         status = ocrdma_mbx_destroy_srq(dev, srq);
1796
1797         if (srq->pd->uctx)
1798                 ocrdma_del_mmap(srq->pd->uctx, (u64) srq->rq.pa,
1799                                 PAGE_ALIGN(srq->rq.len));
1800
1801         kfree(srq->idx_bit_fields);
1802         kfree(srq->rqe_wr_id_tbl);
1803         kfree(srq);
1804         return status;
1805 }
1806
1807 /* unprivileged verbs and their support functions. */
1808 static void ocrdma_build_ud_hdr(struct ocrdma_qp *qp,
1809                                 struct ocrdma_hdr_wqe *hdr,
1810                                 struct ib_send_wr *wr)
1811 {
1812         struct ocrdma_ewqe_ud_hdr *ud_hdr =
1813                 (struct ocrdma_ewqe_ud_hdr *)(hdr + 1);
1814         struct ocrdma_ah *ah = get_ocrdma_ah(wr->wr.ud.ah);
1815
1816         ud_hdr->rsvd_dest_qpn = wr->wr.ud.remote_qpn;
1817         if (qp->qp_type == IB_QPT_GSI)
1818                 ud_hdr->qkey = qp->qkey;
1819         else
1820                 ud_hdr->qkey = wr->wr.ud.remote_qkey;
1821         ud_hdr->rsvd_ahid = ah->id;
1822 }
1823
1824 static void ocrdma_build_sges(struct ocrdma_hdr_wqe *hdr,
1825                               struct ocrdma_sge *sge, int num_sge,
1826                               struct ib_sge *sg_list)
1827 {
1828         int i;
1829
1830         for (i = 0; i < num_sge; i++) {
1831                 sge[i].lrkey = sg_list[i].lkey;
1832                 sge[i].addr_lo = sg_list[i].addr;
1833                 sge[i].addr_hi = upper_32_bits(sg_list[i].addr);
1834                 sge[i].len = sg_list[i].length;
1835                 hdr->total_len += sg_list[i].length;
1836         }
1837         if (num_sge == 0)
1838                 memset(sge, 0, sizeof(*sge));
1839 }
1840
1841 static inline uint32_t ocrdma_sglist_len(struct ib_sge *sg_list, int num_sge)
1842 {
1843         uint32_t total_len = 0, i;
1844
1845         for (i = 0; i < num_sge; i++)
1846                 total_len += sg_list[i].length;
1847         return total_len;
1848 }
1849
1850
1851 static int ocrdma_build_inline_sges(struct ocrdma_qp *qp,
1852                                     struct ocrdma_hdr_wqe *hdr,
1853                                     struct ocrdma_sge *sge,
1854                                     struct ib_send_wr *wr, u32 wqe_size)
1855 {
1856         int i;
1857         char *dpp_addr;
1858
1859         if (wr->send_flags & IB_SEND_INLINE && qp->qp_type != IB_QPT_UD) {
1860                 hdr->total_len = ocrdma_sglist_len(wr->sg_list, wr->num_sge);
1861                 if (unlikely(hdr->total_len > qp->max_inline_data)) {
1862                         pr_err("%s() supported_len=0x%x,\n"
1863                                " unspported len req=0x%x\n", __func__,
1864                                 qp->max_inline_data, hdr->total_len);
1865                         return -EINVAL;
1866                 }
1867                 dpp_addr = (char *)sge;
1868                 for (i = 0; i < wr->num_sge; i++) {
1869                         memcpy(dpp_addr,
1870                                (void *)(unsigned long)wr->sg_list[i].addr,
1871                                wr->sg_list[i].length);
1872                         dpp_addr += wr->sg_list[i].length;
1873                 }
1874
1875                 wqe_size += roundup(hdr->total_len, OCRDMA_WQE_ALIGN_BYTES);
1876                 if (0 == hdr->total_len)
1877                         wqe_size += sizeof(struct ocrdma_sge);
1878                 hdr->cw |= (OCRDMA_TYPE_INLINE << OCRDMA_WQE_TYPE_SHIFT);
1879         } else {
1880                 ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
1881                 if (wr->num_sge)
1882                         wqe_size += (wr->num_sge * sizeof(struct ocrdma_sge));
1883                 else
1884                         wqe_size += sizeof(struct ocrdma_sge);
1885                 hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
1886         }
1887         hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
1888         return 0;
1889 }
1890
1891 static int ocrdma_build_send(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
1892                              struct ib_send_wr *wr)
1893 {
1894         int status;
1895         struct ocrdma_sge *sge;
1896         u32 wqe_size = sizeof(*hdr);
1897
1898         if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
1899                 ocrdma_build_ud_hdr(qp, hdr, wr);
1900                 sge = (struct ocrdma_sge *)(hdr + 2);
1901                 wqe_size += sizeof(struct ocrdma_ewqe_ud_hdr);
1902         } else {
1903                 sge = (struct ocrdma_sge *)(hdr + 1);
1904         }
1905
1906         status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
1907         return status;
1908 }
1909
1910 static int ocrdma_build_write(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
1911                               struct ib_send_wr *wr)
1912 {
1913         int status;
1914         struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
1915         struct ocrdma_sge *sge = ext_rw + 1;
1916         u32 wqe_size = sizeof(*hdr) + sizeof(*ext_rw);
1917
1918         status = ocrdma_build_inline_sges(qp, hdr, sge, wr, wqe_size);
1919         if (status)
1920                 return status;
1921         ext_rw->addr_lo = wr->wr.rdma.remote_addr;
1922         ext_rw->addr_hi = upper_32_bits(wr->wr.rdma.remote_addr);
1923         ext_rw->lrkey = wr->wr.rdma.rkey;
1924         ext_rw->len = hdr->total_len;
1925         return 0;
1926 }
1927
1928 static void ocrdma_build_read(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
1929                               struct ib_send_wr *wr)
1930 {
1931         struct ocrdma_sge *ext_rw = (struct ocrdma_sge *)(hdr + 1);
1932         struct ocrdma_sge *sge = ext_rw + 1;
1933         u32 wqe_size = ((wr->num_sge + 1) * sizeof(struct ocrdma_sge)) +
1934             sizeof(struct ocrdma_hdr_wqe);
1935
1936         ocrdma_build_sges(hdr, sge, wr->num_sge, wr->sg_list);
1937         hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
1938         hdr->cw |= (OCRDMA_READ << OCRDMA_WQE_OPCODE_SHIFT);
1939         hdr->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
1940
1941         ext_rw->addr_lo = wr->wr.rdma.remote_addr;
1942         ext_rw->addr_hi = upper_32_bits(wr->wr.rdma.remote_addr);
1943         ext_rw->lrkey = wr->wr.rdma.rkey;
1944         ext_rw->len = hdr->total_len;
1945 }
1946
1947 static void build_frmr_pbes(struct ib_send_wr *wr, struct ocrdma_pbl *pbl_tbl,
1948                             struct ocrdma_hw_mr *hwmr)
1949 {
1950         int i;
1951         u64 buf_addr = 0;
1952         int num_pbes;
1953         struct ocrdma_pbe *pbe;
1954
1955         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
1956         num_pbes = 0;
1957
1958         /* go through the OS phy regions & fill hw pbe entries into pbls. */
1959         for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) {
1960                 /* number of pbes can be more for one OS buf, when
1961                  * buffers are of different sizes.
1962                  * split the ib_buf to one or more pbes.
1963                  */
1964                 buf_addr = wr->wr.fast_reg.page_list->page_list[i];
1965                 pbe->pa_lo = cpu_to_le32((u32) (buf_addr & PAGE_MASK));
1966                 pbe->pa_hi = cpu_to_le32((u32) upper_32_bits(buf_addr));
1967                 num_pbes += 1;
1968                 pbe++;
1969
1970                 /* if the pbl is full storing the pbes,
1971                  * move to next pbl.
1972                 */
1973                 if (num_pbes == (hwmr->pbl_size/sizeof(u64))) {
1974                         pbl_tbl++;
1975                         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
1976                 }
1977         }
1978         return;
1979 }
1980
1981 static int get_encoded_page_size(int pg_sz)
1982 {
1983         /* Max size is 256M 4096 << 16 */
1984         int i = 0;
1985         for (; i < 17; i++)
1986                 if (pg_sz == (4096 << i))
1987                         break;
1988         return i;
1989 }
1990
1991
1992 static int ocrdma_build_fr(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe *hdr,
1993                            struct ib_send_wr *wr)
1994 {
1995         u64 fbo;
1996         struct ocrdma_ewqe_fr *fast_reg = (struct ocrdma_ewqe_fr *)(hdr + 1);
1997         struct ocrdma_mr *mr;
1998         u32 wqe_size = sizeof(*fast_reg) + sizeof(*hdr);
1999
2000         wqe_size = roundup(wqe_size, OCRDMA_WQE_ALIGN_BYTES);
2001
2002         if (wr->wr.fast_reg.page_list_len > qp->dev->attr.max_pages_per_frmr)
2003                 return -EINVAL;
2004
2005         hdr->cw |= (OCRDMA_FR_MR << OCRDMA_WQE_OPCODE_SHIFT);
2006         hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT);
2007
2008         if (wr->wr.fast_reg.page_list_len == 0)
2009                 BUG();
2010         if (wr->wr.fast_reg.access_flags & IB_ACCESS_LOCAL_WRITE)
2011                 hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_LOCAL_WR;
2012         if (wr->wr.fast_reg.access_flags & IB_ACCESS_REMOTE_WRITE)
2013                 hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_WR;
2014         if (wr->wr.fast_reg.access_flags & IB_ACCESS_REMOTE_READ)
2015                 hdr->rsvd_lkey_flags |= OCRDMA_LKEY_FLAG_REMOTE_RD;
2016         hdr->lkey = wr->wr.fast_reg.rkey;
2017         hdr->total_len = wr->wr.fast_reg.length;
2018
2019         fbo = wr->wr.fast_reg.iova_start -
2020             (wr->wr.fast_reg.page_list->page_list[0] & PAGE_MASK);
2021
2022         fast_reg->va_hi = upper_32_bits(wr->wr.fast_reg.iova_start);
2023         fast_reg->va_lo = (u32) (wr->wr.fast_reg.iova_start & 0xffffffff);
2024         fast_reg->fbo_hi = upper_32_bits(fbo);
2025         fast_reg->fbo_lo = (u32) fbo & 0xffffffff;
2026         fast_reg->num_sges = wr->wr.fast_reg.page_list_len;
2027         fast_reg->size_sge =
2028                 get_encoded_page_size(1 << wr->wr.fast_reg.page_shift);
2029         mr = (struct ocrdma_mr *) (unsigned long)
2030                 qp->dev->stag_arr[(hdr->lkey >> 8) & (OCRDMA_MAX_STAG - 1)];
2031         build_frmr_pbes(wr, mr->hwmr.pbl_table, &mr->hwmr);
2032         return 0;
2033 }
2034
2035 static void ocrdma_ring_sq_db(struct ocrdma_qp *qp)
2036 {
2037         u32 val = qp->sq.dbid | (1 << OCRDMA_DB_SQ_SHIFT);
2038
2039         iowrite32(val, qp->sq_db);
2040 }
2041
2042 int ocrdma_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
2043                      struct ib_send_wr **bad_wr)
2044 {
2045         int status = 0;
2046         struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
2047         struct ocrdma_hdr_wqe *hdr;
2048         unsigned long flags;
2049
2050         spin_lock_irqsave(&qp->q_lock, flags);
2051         if (qp->state != OCRDMA_QPS_RTS && qp->state != OCRDMA_QPS_SQD) {
2052                 spin_unlock_irqrestore(&qp->q_lock, flags);
2053                 *bad_wr = wr;
2054                 return -EINVAL;
2055         }
2056
2057         while (wr) {
2058                 if (qp->qp_type == IB_QPT_UD &&
2059                     (wr->opcode != IB_WR_SEND &&
2060                      wr->opcode != IB_WR_SEND_WITH_IMM)) {
2061                         *bad_wr = wr;
2062                         status = -EINVAL;
2063                         break;
2064                 }
2065                 if (ocrdma_hwq_free_cnt(&qp->sq) == 0 ||
2066                     wr->num_sge > qp->sq.max_sges) {
2067                         *bad_wr = wr;
2068                         status = -ENOMEM;
2069                         break;
2070                 }
2071                 hdr = ocrdma_hwq_head(&qp->sq);
2072                 hdr->cw = 0;
2073                 if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled)
2074                         hdr->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
2075                 if (wr->send_flags & IB_SEND_FENCE)
2076                         hdr->cw |=
2077                             (OCRDMA_FLAG_FENCE_L << OCRDMA_WQE_FLAGS_SHIFT);
2078                 if (wr->send_flags & IB_SEND_SOLICITED)
2079                         hdr->cw |=
2080                             (OCRDMA_FLAG_SOLICIT << OCRDMA_WQE_FLAGS_SHIFT);
2081                 hdr->total_len = 0;
2082                 switch (wr->opcode) {
2083                 case IB_WR_SEND_WITH_IMM:
2084                         hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
2085                         hdr->immdt = ntohl(wr->ex.imm_data);
2086                 case IB_WR_SEND:
2087                         hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
2088                         ocrdma_build_send(qp, hdr, wr);
2089                         break;
2090                 case IB_WR_SEND_WITH_INV:
2091                         hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT);
2092                         hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
2093                         hdr->lkey = wr->ex.invalidate_rkey;
2094                         status = ocrdma_build_send(qp, hdr, wr);
2095                         break;
2096                 case IB_WR_RDMA_WRITE_WITH_IMM:
2097                         hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
2098                         hdr->immdt = ntohl(wr->ex.imm_data);
2099                 case IB_WR_RDMA_WRITE:
2100                         hdr->cw |= (OCRDMA_WRITE << OCRDMA_WQE_OPCODE_SHIFT);
2101                         status = ocrdma_build_write(qp, hdr, wr);
2102                         break;
2103                 case IB_WR_RDMA_READ_WITH_INV:
2104                         hdr->cw |= (OCRDMA_FLAG_INV << OCRDMA_WQE_FLAGS_SHIFT);
2105                 case IB_WR_RDMA_READ:
2106                         ocrdma_build_read(qp, hdr, wr);
2107                         break;
2108                 case IB_WR_LOCAL_INV:
2109                         hdr->cw |=
2110                             (OCRDMA_LKEY_INV << OCRDMA_WQE_OPCODE_SHIFT);
2111                         hdr->cw |= ((sizeof(struct ocrdma_hdr_wqe) +
2112                                         sizeof(struct ocrdma_sge)) /
2113                                 OCRDMA_WQE_STRIDE) << OCRDMA_WQE_SIZE_SHIFT;
2114                         hdr->lkey = wr->ex.invalidate_rkey;
2115                         break;
2116                 case IB_WR_FAST_REG_MR:
2117                         status = ocrdma_build_fr(qp, hdr, wr);
2118                         break;
2119                 default:
2120                         status = -EINVAL;
2121                         break;
2122                 }
2123                 if (status) {
2124                         *bad_wr = wr;
2125                         break;
2126                 }
2127                 if (wr->send_flags & IB_SEND_SIGNALED || qp->signaled)
2128                         qp->wqe_wr_id_tbl[qp->sq.head].signaled = 1;
2129                 else
2130                         qp->wqe_wr_id_tbl[qp->sq.head].signaled = 0;
2131                 qp->wqe_wr_id_tbl[qp->sq.head].wrid = wr->wr_id;
2132                 ocrdma_cpu_to_le32(hdr, ((hdr->cw >> OCRDMA_WQE_SIZE_SHIFT) &
2133                                    OCRDMA_WQE_SIZE_MASK) * OCRDMA_WQE_STRIDE);
2134                 /* make sure wqe is written before adapter can access it */
2135                 wmb();
2136                 /* inform hw to start processing it */
2137                 ocrdma_ring_sq_db(qp);
2138
2139                 /* update pointer, counter for next wr */
2140                 ocrdma_hwq_inc_head(&qp->sq);
2141                 wr = wr->next;
2142         }
2143         spin_unlock_irqrestore(&qp->q_lock, flags);
2144         return status;
2145 }
2146
2147 static void ocrdma_ring_rq_db(struct ocrdma_qp *qp)
2148 {
2149         u32 val = qp->rq.dbid | (1 << OCRDMA_DB_RQ_SHIFT);
2150
2151         iowrite32(val, qp->rq_db);
2152 }
2153
2154 static void ocrdma_build_rqe(struct ocrdma_hdr_wqe *rqe, struct ib_recv_wr *wr,
2155                              u16 tag)
2156 {
2157         u32 wqe_size = 0;
2158         struct ocrdma_sge *sge;
2159         if (wr->num_sge)
2160                 wqe_size = (wr->num_sge * sizeof(*sge)) + sizeof(*rqe);
2161         else
2162                 wqe_size = sizeof(*sge) + sizeof(*rqe);
2163
2164         rqe->cw = ((wqe_size / OCRDMA_WQE_STRIDE) <<
2165                                 OCRDMA_WQE_SIZE_SHIFT);
2166         rqe->cw |= (OCRDMA_FLAG_SIG << OCRDMA_WQE_FLAGS_SHIFT);
2167         rqe->cw |= (OCRDMA_TYPE_LKEY << OCRDMA_WQE_TYPE_SHIFT);
2168         rqe->total_len = 0;
2169         rqe->rsvd_tag = tag;
2170         sge = (struct ocrdma_sge *)(rqe + 1);
2171         ocrdma_build_sges(rqe, sge, wr->num_sge, wr->sg_list);
2172         ocrdma_cpu_to_le32(rqe, wqe_size);
2173 }
2174
2175 int ocrdma_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2176                      struct ib_recv_wr **bad_wr)
2177 {
2178         int status = 0;
2179         unsigned long flags;
2180         struct ocrdma_qp *qp = get_ocrdma_qp(ibqp);
2181         struct ocrdma_hdr_wqe *rqe;
2182
2183         spin_lock_irqsave(&qp->q_lock, flags);
2184         if (qp->state == OCRDMA_QPS_RST || qp->state == OCRDMA_QPS_ERR) {
2185                 spin_unlock_irqrestore(&qp->q_lock, flags);
2186                 *bad_wr = wr;
2187                 return -EINVAL;
2188         }
2189         while (wr) {
2190                 if (ocrdma_hwq_free_cnt(&qp->rq) == 0 ||
2191                     wr->num_sge > qp->rq.max_sges) {
2192                         *bad_wr = wr;
2193                         status = -ENOMEM;
2194                         break;
2195                 }
2196                 rqe = ocrdma_hwq_head(&qp->rq);
2197                 ocrdma_build_rqe(rqe, wr, 0);
2198
2199                 qp->rqe_wr_id_tbl[qp->rq.head] = wr->wr_id;
2200                 /* make sure rqe is written before adapter can access it */
2201                 wmb();
2202
2203                 /* inform hw to start processing it */
2204                 ocrdma_ring_rq_db(qp);
2205
2206                 /* update pointer, counter for next wr */
2207                 ocrdma_hwq_inc_head(&qp->rq);
2208                 wr = wr->next;
2209         }
2210         spin_unlock_irqrestore(&qp->q_lock, flags);
2211         return status;
2212 }
2213
2214 /* cqe for srq's rqe can potentially arrive out of order.
2215  * index gives the entry in the shadow table where to store
2216  * the wr_id. tag/index is returned in cqe to reference back
2217  * for a given rqe.
2218  */
2219 static int ocrdma_srq_get_idx(struct ocrdma_srq *srq)
2220 {
2221         int row = 0;
2222         int indx = 0;
2223
2224         for (row = 0; row < srq->bit_fields_len; row++) {
2225                 if (srq->idx_bit_fields[row]) {
2226                         indx = ffs(srq->idx_bit_fields[row]);
2227                         indx = (row * 32) + (indx - 1);
2228                         if (indx >= srq->rq.max_cnt)
2229                                 BUG();
2230                         ocrdma_srq_toggle_bit(srq, indx);
2231                         break;
2232                 }
2233         }
2234
2235         if (row == srq->bit_fields_len)
2236                 BUG();
2237         return indx + 1; /* Use from index 1 */
2238 }
2239
2240 static void ocrdma_ring_srq_db(struct ocrdma_srq *srq)
2241 {
2242         u32 val = srq->rq.dbid | (1 << 16);
2243
2244         iowrite32(val, srq->db + OCRDMA_DB_GEN2_SRQ_OFFSET);
2245 }
2246
2247 int ocrdma_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
2248                          struct ib_recv_wr **bad_wr)
2249 {
2250         int status = 0;
2251         unsigned long flags;
2252         struct ocrdma_srq *srq;
2253         struct ocrdma_hdr_wqe *rqe;
2254         u16 tag;
2255
2256         srq = get_ocrdma_srq(ibsrq);
2257
2258         spin_lock_irqsave(&srq->q_lock, flags);
2259         while (wr) {
2260                 if (ocrdma_hwq_free_cnt(&srq->rq) == 0 ||
2261                     wr->num_sge > srq->rq.max_sges) {
2262                         status = -ENOMEM;
2263                         *bad_wr = wr;
2264                         break;
2265                 }
2266                 tag = ocrdma_srq_get_idx(srq);
2267                 rqe = ocrdma_hwq_head(&srq->rq);
2268                 ocrdma_build_rqe(rqe, wr, tag);
2269
2270                 srq->rqe_wr_id_tbl[tag] = wr->wr_id;
2271                 /* make sure rqe is written before adapter can perform DMA */
2272                 wmb();
2273                 /* inform hw to start processing it */
2274                 ocrdma_ring_srq_db(srq);
2275                 /* update pointer, counter for next wr */
2276                 ocrdma_hwq_inc_head(&srq->rq);
2277                 wr = wr->next;
2278         }
2279         spin_unlock_irqrestore(&srq->q_lock, flags);
2280         return status;
2281 }
2282
2283 static enum ib_wc_status ocrdma_to_ibwc_err(u16 status)
2284 {
2285         enum ib_wc_status ibwc_status;
2286
2287         switch (status) {
2288         case OCRDMA_CQE_GENERAL_ERR:
2289                 ibwc_status = IB_WC_GENERAL_ERR;
2290                 break;
2291         case OCRDMA_CQE_LOC_LEN_ERR:
2292                 ibwc_status = IB_WC_LOC_LEN_ERR;
2293                 break;
2294         case OCRDMA_CQE_LOC_QP_OP_ERR:
2295                 ibwc_status = IB_WC_LOC_QP_OP_ERR;
2296                 break;
2297         case OCRDMA_CQE_LOC_EEC_OP_ERR:
2298                 ibwc_status = IB_WC_LOC_EEC_OP_ERR;
2299                 break;
2300         case OCRDMA_CQE_LOC_PROT_ERR:
2301                 ibwc_status = IB_WC_LOC_PROT_ERR;
2302                 break;
2303         case OCRDMA_CQE_WR_FLUSH_ERR:
2304                 ibwc_status = IB_WC_WR_FLUSH_ERR;
2305                 break;
2306         case OCRDMA_CQE_MW_BIND_ERR:
2307                 ibwc_status = IB_WC_MW_BIND_ERR;
2308                 break;
2309         case OCRDMA_CQE_BAD_RESP_ERR:
2310                 ibwc_status = IB_WC_BAD_RESP_ERR;
2311                 break;
2312         case OCRDMA_CQE_LOC_ACCESS_ERR:
2313                 ibwc_status = IB_WC_LOC_ACCESS_ERR;
2314                 break;
2315         case OCRDMA_CQE_REM_INV_REQ_ERR:
2316                 ibwc_status = IB_WC_REM_INV_REQ_ERR;
2317                 break;
2318         case OCRDMA_CQE_REM_ACCESS_ERR:
2319                 ibwc_status = IB_WC_REM_ACCESS_ERR;
2320                 break;
2321         case OCRDMA_CQE_REM_OP_ERR:
2322                 ibwc_status = IB_WC_REM_OP_ERR;
2323                 break;
2324         case OCRDMA_CQE_RETRY_EXC_ERR:
2325                 ibwc_status = IB_WC_RETRY_EXC_ERR;
2326                 break;
2327         case OCRDMA_CQE_RNR_RETRY_EXC_ERR:
2328                 ibwc_status = IB_WC_RNR_RETRY_EXC_ERR;
2329                 break;
2330         case OCRDMA_CQE_LOC_RDD_VIOL_ERR:
2331                 ibwc_status = IB_WC_LOC_RDD_VIOL_ERR;
2332                 break;
2333         case OCRDMA_CQE_REM_INV_RD_REQ_ERR:
2334                 ibwc_status = IB_WC_REM_INV_RD_REQ_ERR;
2335                 break;
2336         case OCRDMA_CQE_REM_ABORT_ERR:
2337                 ibwc_status = IB_WC_REM_ABORT_ERR;
2338                 break;
2339         case OCRDMA_CQE_INV_EECN_ERR:
2340                 ibwc_status = IB_WC_INV_EECN_ERR;
2341                 break;
2342         case OCRDMA_CQE_INV_EEC_STATE_ERR:
2343                 ibwc_status = IB_WC_INV_EEC_STATE_ERR;
2344                 break;
2345         case OCRDMA_CQE_FATAL_ERR:
2346                 ibwc_status = IB_WC_FATAL_ERR;
2347                 break;
2348         case OCRDMA_CQE_RESP_TIMEOUT_ERR:
2349                 ibwc_status = IB_WC_RESP_TIMEOUT_ERR;
2350                 break;
2351         default:
2352                 ibwc_status = IB_WC_GENERAL_ERR;
2353                 break;
2354         }
2355         return ibwc_status;
2356 }
2357
2358 static void ocrdma_update_wc(struct ocrdma_qp *qp, struct ib_wc *ibwc,
2359                       u32 wqe_idx)
2360 {
2361         struct ocrdma_hdr_wqe *hdr;
2362         struct ocrdma_sge *rw;
2363         int opcode;
2364
2365         hdr = ocrdma_hwq_head_from_idx(&qp->sq, wqe_idx);
2366
2367         ibwc->wr_id = qp->wqe_wr_id_tbl[wqe_idx].wrid;
2368         /* Undo the hdr->cw swap */
2369         opcode = le32_to_cpu(hdr->cw) & OCRDMA_WQE_OPCODE_MASK;
2370         switch (opcode) {
2371         case OCRDMA_WRITE:
2372                 ibwc->opcode = IB_WC_RDMA_WRITE;
2373                 break;
2374         case OCRDMA_READ:
2375                 rw = (struct ocrdma_sge *)(hdr + 1);
2376                 ibwc->opcode = IB_WC_RDMA_READ;
2377                 ibwc->byte_len = rw->len;
2378                 break;
2379         case OCRDMA_SEND:
2380                 ibwc->opcode = IB_WC_SEND;
2381                 break;
2382         case OCRDMA_FR_MR:
2383                 ibwc->opcode = IB_WC_FAST_REG_MR;
2384                 break;
2385         case OCRDMA_LKEY_INV:
2386                 ibwc->opcode = IB_WC_LOCAL_INV;
2387                 break;
2388         default:
2389                 ibwc->status = IB_WC_GENERAL_ERR;
2390                 pr_err("%s() invalid opcode received = 0x%x\n",
2391                        __func__, hdr->cw & OCRDMA_WQE_OPCODE_MASK);
2392                 break;
2393         }
2394 }
2395
2396 static void ocrdma_set_cqe_status_flushed(struct ocrdma_qp *qp,
2397                                                 struct ocrdma_cqe *cqe)
2398 {
2399         if (is_cqe_for_sq(cqe)) {
2400                 cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2401                                 cqe->flags_status_srcqpn) &
2402                                         ~OCRDMA_CQE_STATUS_MASK);
2403                 cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2404                                 cqe->flags_status_srcqpn) |
2405                                 (OCRDMA_CQE_WR_FLUSH_ERR <<
2406                                         OCRDMA_CQE_STATUS_SHIFT));
2407         } else {
2408                 if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
2409                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2410                                         cqe->flags_status_srcqpn) &
2411                                                 ~OCRDMA_CQE_UD_STATUS_MASK);
2412                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2413                                         cqe->flags_status_srcqpn) |
2414                                         (OCRDMA_CQE_WR_FLUSH_ERR <<
2415                                                 OCRDMA_CQE_UD_STATUS_SHIFT));
2416                 } else {
2417                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2418                                         cqe->flags_status_srcqpn) &
2419                                                 ~OCRDMA_CQE_STATUS_MASK);
2420                         cqe->flags_status_srcqpn = cpu_to_le32(le32_to_cpu(
2421                                         cqe->flags_status_srcqpn) |
2422                                         (OCRDMA_CQE_WR_FLUSH_ERR <<
2423                                                 OCRDMA_CQE_STATUS_SHIFT));
2424                 }
2425         }
2426 }
2427
2428 static bool ocrdma_update_err_cqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
2429                                   struct ocrdma_qp *qp, int status)
2430 {
2431         bool expand = false;
2432
2433         ibwc->byte_len = 0;
2434         ibwc->qp = &qp->ibqp;
2435         ibwc->status = ocrdma_to_ibwc_err(status);
2436
2437         ocrdma_flush_qp(qp);
2438         ocrdma_qp_state_change(qp, IB_QPS_ERR, NULL);
2439
2440         /* if wqe/rqe pending for which cqe needs to be returned,
2441          * trigger inflating it.
2442          */
2443         if (!is_hw_rq_empty(qp) || !is_hw_sq_empty(qp)) {
2444                 expand = true;
2445                 ocrdma_set_cqe_status_flushed(qp, cqe);
2446         }
2447         return expand;
2448 }
2449
2450 static int ocrdma_update_err_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
2451                                   struct ocrdma_qp *qp, int status)
2452 {
2453         ibwc->opcode = IB_WC_RECV;
2454         ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
2455         ocrdma_hwq_inc_tail(&qp->rq);
2456
2457         return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
2458 }
2459
2460 static int ocrdma_update_err_scqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe,
2461                                   struct ocrdma_qp *qp, int status)
2462 {
2463         ocrdma_update_wc(qp, ibwc, qp->sq.tail);
2464         ocrdma_hwq_inc_tail(&qp->sq);
2465
2466         return ocrdma_update_err_cqe(ibwc, cqe, qp, status);
2467 }
2468
2469
2470 static bool ocrdma_poll_err_scqe(struct ocrdma_qp *qp,
2471                                  struct ocrdma_cqe *cqe, struct ib_wc *ibwc,
2472                                  bool *polled, bool *stop)
2473 {
2474         bool expand;
2475         int status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2476                 OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
2477
2478         /* when hw sq is empty, but rq is not empty, so we continue
2479          * to keep the cqe in order to get the cq event again.
2480          */
2481         if (is_hw_sq_empty(qp) && !is_hw_rq_empty(qp)) {
2482                 /* when cq for rq and sq is same, it is safe to return
2483                  * flush cqe for RQEs.
2484                  */
2485                 if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
2486                         *polled = true;
2487                         status = OCRDMA_CQE_WR_FLUSH_ERR;
2488                         expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
2489                 } else {
2490                         /* stop processing further cqe as this cqe is used for
2491                          * triggering cq event on buddy cq of RQ.
2492                          * When QP is destroyed, this cqe will be removed
2493                          * from the cq's hardware q.
2494                          */
2495                         *polled = false;
2496                         *stop = true;
2497                         expand = false;
2498                 }
2499         } else if (is_hw_sq_empty(qp)) {
2500                 /* Do nothing */
2501                 expand = false;
2502                 *polled = false;
2503                 *stop = false;
2504         } else {
2505                 *polled = true;
2506                 expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
2507         }
2508         return expand;
2509 }
2510
2511 static bool ocrdma_poll_success_scqe(struct ocrdma_qp *qp,
2512                                      struct ocrdma_cqe *cqe,
2513                                      struct ib_wc *ibwc, bool *polled)
2514 {
2515         bool expand = false;
2516         int tail = qp->sq.tail;
2517         u32 wqe_idx;
2518
2519         if (!qp->wqe_wr_id_tbl[tail].signaled) {
2520                 *polled = false;    /* WC cannot be consumed yet */
2521         } else {
2522                 ibwc->status = IB_WC_SUCCESS;
2523                 ibwc->wc_flags = 0;
2524                 ibwc->qp = &qp->ibqp;
2525                 ocrdma_update_wc(qp, ibwc, tail);
2526                 *polled = true;
2527         }
2528         wqe_idx = (le32_to_cpu(cqe->wq.wqeidx) &
2529                         OCRDMA_CQE_WQEIDX_MASK) & qp->sq.max_wqe_idx;
2530         if (tail != wqe_idx)
2531                 expand = true; /* Coalesced CQE can't be consumed yet */
2532
2533         ocrdma_hwq_inc_tail(&qp->sq);
2534         return expand;
2535 }
2536
2537 static bool ocrdma_poll_scqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
2538                              struct ib_wc *ibwc, bool *polled, bool *stop)
2539 {
2540         int status;
2541         bool expand;
2542
2543         status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2544                 OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
2545
2546         if (status == OCRDMA_CQE_SUCCESS)
2547                 expand = ocrdma_poll_success_scqe(qp, cqe, ibwc, polled);
2548         else
2549                 expand = ocrdma_poll_err_scqe(qp, cqe, ibwc, polled, stop);
2550         return expand;
2551 }
2552
2553 static int ocrdma_update_ud_rcqe(struct ib_wc *ibwc, struct ocrdma_cqe *cqe)
2554 {
2555         int status;
2556
2557         status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2558                 OCRDMA_CQE_UD_STATUS_MASK) >> OCRDMA_CQE_UD_STATUS_SHIFT;
2559         ibwc->src_qp = le32_to_cpu(cqe->flags_status_srcqpn) &
2560                                                 OCRDMA_CQE_SRCQP_MASK;
2561         ibwc->pkey_index = le32_to_cpu(cqe->ud.rxlen_pkey) &
2562                                                 OCRDMA_CQE_PKEY_MASK;
2563         ibwc->wc_flags = IB_WC_GRH;
2564         ibwc->byte_len = (le32_to_cpu(cqe->ud.rxlen_pkey) >>
2565                                         OCRDMA_CQE_UD_XFER_LEN_SHIFT);
2566         return status;
2567 }
2568
2569 static void ocrdma_update_free_srq_cqe(struct ib_wc *ibwc,
2570                                        struct ocrdma_cqe *cqe,
2571                                        struct ocrdma_qp *qp)
2572 {
2573         unsigned long flags;
2574         struct ocrdma_srq *srq;
2575         u32 wqe_idx;
2576
2577         srq = get_ocrdma_srq(qp->ibqp.srq);
2578         wqe_idx = (le32_to_cpu(cqe->rq.buftag_qpn) >>
2579                 OCRDMA_CQE_BUFTAG_SHIFT) & srq->rq.max_wqe_idx;
2580         if (wqe_idx < 1)
2581                 BUG();
2582
2583         ibwc->wr_id = srq->rqe_wr_id_tbl[wqe_idx];
2584         spin_lock_irqsave(&srq->q_lock, flags);
2585         ocrdma_srq_toggle_bit(srq, wqe_idx - 1);
2586         spin_unlock_irqrestore(&srq->q_lock, flags);
2587         ocrdma_hwq_inc_tail(&srq->rq);
2588 }
2589
2590 static bool ocrdma_poll_err_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
2591                                 struct ib_wc *ibwc, bool *polled, bool *stop,
2592                                 int status)
2593 {
2594         bool expand;
2595
2596         /* when hw_rq is empty, but wq is not empty, so continue
2597          * to keep the cqe to get the cq event again.
2598          */
2599         if (is_hw_rq_empty(qp) && !is_hw_sq_empty(qp)) {
2600                 if (!qp->srq && (qp->sq_cq == qp->rq_cq)) {
2601                         *polled = true;
2602                         status = OCRDMA_CQE_WR_FLUSH_ERR;
2603                         expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status);
2604                 } else {
2605                         *polled = false;
2606                         *stop = true;
2607                         expand = false;
2608                 }
2609         } else if (is_hw_rq_empty(qp)) {
2610                 /* Do nothing */
2611                 expand = false;
2612                 *polled = false;
2613                 *stop = false;
2614         } else {
2615                 *polled = true;
2616                 expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);
2617         }
2618         return expand;
2619 }
2620
2621 static void ocrdma_poll_success_rcqe(struct ocrdma_qp *qp,
2622                                      struct ocrdma_cqe *cqe, struct ib_wc *ibwc)
2623 {
2624         ibwc->opcode = IB_WC_RECV;
2625         ibwc->qp = &qp->ibqp;
2626         ibwc->status = IB_WC_SUCCESS;
2627
2628         if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI)
2629                 ocrdma_update_ud_rcqe(ibwc, cqe);
2630         else
2631                 ibwc->byte_len = le32_to_cpu(cqe->rq.rxlen);
2632
2633         if (is_cqe_imm(cqe)) {
2634                 ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
2635                 ibwc->wc_flags |= IB_WC_WITH_IMM;
2636         } else if (is_cqe_wr_imm(cqe)) {
2637                 ibwc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
2638                 ibwc->ex.imm_data = htonl(le32_to_cpu(cqe->rq.lkey_immdt));
2639                 ibwc->wc_flags |= IB_WC_WITH_IMM;
2640         } else if (is_cqe_invalidated(cqe)) {
2641                 ibwc->ex.invalidate_rkey = le32_to_cpu(cqe->rq.lkey_immdt);
2642                 ibwc->wc_flags |= IB_WC_WITH_INVALIDATE;
2643         }
2644         if (qp->ibqp.srq) {
2645                 ocrdma_update_free_srq_cqe(ibwc, cqe, qp);
2646         } else {
2647                 ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
2648                 ocrdma_hwq_inc_tail(&qp->rq);
2649         }
2650 }
2651
2652 static bool ocrdma_poll_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe,
2653                              struct ib_wc *ibwc, bool *polled, bool *stop)
2654 {
2655         int status;
2656         bool expand = false;
2657
2658         ibwc->wc_flags = 0;
2659         if (qp->qp_type == IB_QPT_UD || qp->qp_type == IB_QPT_GSI) {
2660                 status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2661                                         OCRDMA_CQE_UD_STATUS_MASK) >>
2662                                         OCRDMA_CQE_UD_STATUS_SHIFT;
2663         } else {
2664                 status = (le32_to_cpu(cqe->flags_status_srcqpn) &
2665                              OCRDMA_CQE_STATUS_MASK) >> OCRDMA_CQE_STATUS_SHIFT;
2666         }
2667
2668         if (status == OCRDMA_CQE_SUCCESS) {
2669                 *polled = true;
2670                 ocrdma_poll_success_rcqe(qp, cqe, ibwc);
2671         } else {
2672                 expand = ocrdma_poll_err_rcqe(qp, cqe, ibwc, polled, stop,
2673                                               status);
2674         }
2675         return expand;
2676 }
2677
2678 static void ocrdma_change_cq_phase(struct ocrdma_cq *cq, struct ocrdma_cqe *cqe,
2679                                    u16 cur_getp)
2680 {
2681         if (cq->phase_change) {
2682                 if (cur_getp == 0)
2683                         cq->phase = (~cq->phase & OCRDMA_CQE_VALID);
2684         } else {
2685                 /* clear valid bit */
2686                 cqe->flags_status_srcqpn = 0;
2687         }
2688 }
2689
2690 static int ocrdma_poll_hwcq(struct ocrdma_cq *cq, int num_entries,
2691                             struct ib_wc *ibwc)
2692 {
2693         u16 qpn = 0;
2694         int i = 0;
2695         bool expand = false;
2696         int polled_hw_cqes = 0;
2697         struct ocrdma_qp *qp = NULL;
2698         struct ocrdma_dev *dev = get_ocrdma_dev(cq->ibcq.device);
2699         struct ocrdma_cqe *cqe;
2700         u16 cur_getp; bool polled = false; bool stop = false;
2701
2702         cur_getp = cq->getp;
2703         while (num_entries) {
2704                 cqe = cq->va + cur_getp;
2705                 /* check whether valid cqe or not */
2706                 if (!is_cqe_valid(cq, cqe))
2707                         break;
2708                 qpn = (le32_to_cpu(cqe->cmn.qpn) & OCRDMA_CQE_QPN_MASK);
2709                 /* ignore discarded cqe */
2710                 if (qpn == 0)
2711                         goto skip_cqe;
2712                 qp = dev->qp_tbl[qpn];
2713                 BUG_ON(qp == NULL);
2714
2715                 if (is_cqe_for_sq(cqe)) {
2716                         expand = ocrdma_poll_scqe(qp, cqe, ibwc, &polled,
2717                                                   &stop);
2718                 } else {
2719                         expand = ocrdma_poll_rcqe(qp, cqe, ibwc, &polled,
2720                                                   &stop);
2721                 }
2722                 if (expand)
2723                         goto expand_cqe;
2724                 if (stop)
2725                         goto stop_cqe;
2726                 /* clear qpn to avoid duplicate processing by discard_cqe() */
2727                 cqe->cmn.qpn = 0;
2728 skip_cqe:
2729                 polled_hw_cqes += 1;
2730                 cur_getp = (cur_getp + 1) % cq->max_hw_cqe;
2731                 ocrdma_change_cq_phase(cq, cqe, cur_getp);
2732 expand_cqe:
2733                 if (polled) {
2734                         num_entries -= 1;
2735                         i += 1;
2736                         ibwc = ibwc + 1;
2737                         polled = false;
2738                 }
2739         }
2740 stop_cqe:
2741         cq->getp = cur_getp;
2742         if (cq->deferred_arm) {
2743                 ocrdma_ring_cq_db(dev, cq->id, true, cq->deferred_sol,
2744                                   polled_hw_cqes);
2745                 cq->deferred_arm = false;
2746                 cq->deferred_sol = false;
2747         } else {
2748                 /* We need to pop the CQE. No need to arm */
2749                 ocrdma_ring_cq_db(dev, cq->id, false, cq->deferred_sol,
2750                                   polled_hw_cqes);
2751                 cq->deferred_sol = false;
2752         }
2753
2754         return i;
2755 }
2756
2757 /* insert error cqe if the QP's SQ or RQ's CQ matches the CQ under poll. */
2758 static int ocrdma_add_err_cqe(struct ocrdma_cq *cq, int num_entries,
2759                               struct ocrdma_qp *qp, struct ib_wc *ibwc)
2760 {
2761         int err_cqes = 0;
2762
2763         while (num_entries) {
2764                 if (is_hw_sq_empty(qp) && is_hw_rq_empty(qp))
2765                         break;
2766                 if (!is_hw_sq_empty(qp) && qp->sq_cq == cq) {
2767                         ocrdma_update_wc(qp, ibwc, qp->sq.tail);
2768                         ocrdma_hwq_inc_tail(&qp->sq);
2769                 } else if (!is_hw_rq_empty(qp) && qp->rq_cq == cq) {
2770                         ibwc->wr_id = qp->rqe_wr_id_tbl[qp->rq.tail];
2771                         ocrdma_hwq_inc_tail(&qp->rq);
2772                 } else {
2773                         return err_cqes;
2774                 }
2775                 ibwc->byte_len = 0;
2776                 ibwc->status = IB_WC_WR_FLUSH_ERR;
2777                 ibwc = ibwc + 1;
2778                 err_cqes += 1;
2779                 num_entries -= 1;
2780         }
2781         return err_cqes;
2782 }
2783
2784 int ocrdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
2785 {
2786         int cqes_to_poll = num_entries;
2787         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
2788         struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
2789         int num_os_cqe = 0, err_cqes = 0;
2790         struct ocrdma_qp *qp;
2791         unsigned long flags;
2792
2793         /* poll cqes from adapter CQ */
2794         spin_lock_irqsave(&cq->cq_lock, flags);
2795         num_os_cqe = ocrdma_poll_hwcq(cq, cqes_to_poll, wc);
2796         spin_unlock_irqrestore(&cq->cq_lock, flags);
2797         cqes_to_poll -= num_os_cqe;
2798
2799         if (cqes_to_poll) {
2800                 wc = wc + num_os_cqe;
2801                 /* adapter returns single error cqe when qp moves to
2802                  * error state. So insert error cqes with wc_status as
2803                  * FLUSHED for pending WQEs and RQEs of QP's SQ and RQ
2804                  * respectively which uses this CQ.
2805                  */
2806                 spin_lock_irqsave(&dev->flush_q_lock, flags);
2807                 list_for_each_entry(qp, &cq->sq_head, sq_entry) {
2808                         if (cqes_to_poll == 0)
2809                                 break;
2810                         err_cqes = ocrdma_add_err_cqe(cq, cqes_to_poll, qp, wc);
2811                         cqes_to_poll -= err_cqes;
2812                         num_os_cqe += err_cqes;
2813                         wc = wc + err_cqes;
2814                 }
2815                 spin_unlock_irqrestore(&dev->flush_q_lock, flags);
2816         }
2817         return num_os_cqe;
2818 }
2819
2820 int ocrdma_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags cq_flags)
2821 {
2822         struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
2823         struct ocrdma_dev *dev = get_ocrdma_dev(ibcq->device);
2824         u16 cq_id;
2825         unsigned long flags;
2826         bool arm_needed = false, sol_needed = false;
2827
2828         cq_id = cq->id;
2829
2830         spin_lock_irqsave(&cq->cq_lock, flags);
2831         if (cq_flags & IB_CQ_NEXT_COMP || cq_flags & IB_CQ_SOLICITED)
2832                 arm_needed = true;
2833         if (cq_flags & IB_CQ_SOLICITED)
2834                 sol_needed = true;
2835
2836         if (cq->first_arm) {
2837                 ocrdma_ring_cq_db(dev, cq_id, arm_needed, sol_needed, 0);
2838                 cq->first_arm = false;
2839                 goto skip_defer;
2840         }
2841         cq->deferred_arm = true;
2842
2843 skip_defer:
2844         cq->deferred_sol = sol_needed;
2845         spin_unlock_irqrestore(&cq->cq_lock, flags);
2846
2847         return 0;
2848 }
2849
2850 struct ib_mr *ocrdma_alloc_frmr(struct ib_pd *ibpd, int max_page_list_len)
2851 {
2852         int status;
2853         struct ocrdma_mr *mr;
2854         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
2855         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
2856
2857         if (max_page_list_len > dev->attr.max_pages_per_frmr)
2858                 return ERR_PTR(-EINVAL);
2859
2860         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
2861         if (!mr)
2862                 return ERR_PTR(-ENOMEM);
2863
2864         status = ocrdma_get_pbl_info(dev, mr, max_page_list_len);
2865         if (status)
2866                 goto pbl_err;
2867         mr->hwmr.fr_mr = 1;
2868         mr->hwmr.remote_rd = 0;
2869         mr->hwmr.remote_wr = 0;
2870         mr->hwmr.local_rd = 0;
2871         mr->hwmr.local_wr = 0;
2872         mr->hwmr.mw_bind = 0;
2873         status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
2874         if (status)
2875                 goto pbl_err;
2876         status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, 0);
2877         if (status)
2878                 goto mbx_err;
2879         mr->ibmr.rkey = mr->hwmr.lkey;
2880         mr->ibmr.lkey = mr->hwmr.lkey;
2881         dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] =
2882                 (unsigned long) mr;
2883         return &mr->ibmr;
2884 mbx_err:
2885         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
2886 pbl_err:
2887         kfree(mr);
2888         return ERR_PTR(-ENOMEM);
2889 }
2890
2891 struct ib_fast_reg_page_list *ocrdma_alloc_frmr_page_list(struct ib_device
2892                                                           *ibdev,
2893                                                           int page_list_len)
2894 {
2895         struct ib_fast_reg_page_list *frmr_list;
2896         int size;
2897
2898         size = sizeof(*frmr_list) + (page_list_len * sizeof(u64));
2899         frmr_list = kzalloc(size, GFP_KERNEL);
2900         if (!frmr_list)
2901                 return ERR_PTR(-ENOMEM);
2902         frmr_list->page_list = (u64 *)(frmr_list + 1);
2903         return frmr_list;
2904 }
2905
2906 void ocrdma_free_frmr_page_list(struct ib_fast_reg_page_list *page_list)
2907 {
2908         kfree(page_list);
2909 }
2910
2911 #define MAX_KERNEL_PBE_SIZE 65536
2912 static inline int count_kernel_pbes(struct ib_phys_buf *buf_list,
2913                                     int buf_cnt, u32 *pbe_size)
2914 {
2915         u64 total_size = 0;
2916         u64 buf_size = 0;
2917         int i;
2918         *pbe_size = roundup(buf_list[0].size, PAGE_SIZE);
2919         *pbe_size = roundup_pow_of_two(*pbe_size);
2920
2921         /* find the smallest PBE size that we can have */
2922         for (i = 0; i < buf_cnt; i++) {
2923                 /* first addr may not be page aligned, so ignore checking */
2924                 if ((i != 0) && ((buf_list[i].addr & ~PAGE_MASK) ||
2925                                  (buf_list[i].size & ~PAGE_MASK))) {
2926                         return 0;
2927                 }
2928
2929                 /* if configured PBE size is greater then the chosen one,
2930                  * reduce the PBE size.
2931                  */
2932                 buf_size = roundup(buf_list[i].size, PAGE_SIZE);
2933                 /* pbe_size has to be even multiple of 4K 1,2,4,8...*/
2934                 buf_size = roundup_pow_of_two(buf_size);
2935                 if (*pbe_size > buf_size)
2936                         *pbe_size = buf_size;
2937
2938                 total_size += buf_size;
2939         }
2940         *pbe_size = *pbe_size > MAX_KERNEL_PBE_SIZE ?
2941             (MAX_KERNEL_PBE_SIZE) : (*pbe_size);
2942
2943         /* num_pbes = total_size / (*pbe_size);  this is implemented below. */
2944
2945         return total_size >> ilog2(*pbe_size);
2946 }
2947
2948 static void build_kernel_pbes(struct ib_phys_buf *buf_list, int ib_buf_cnt,
2949                               u32 pbe_size, struct ocrdma_pbl *pbl_tbl,
2950                               struct ocrdma_hw_mr *hwmr)
2951 {
2952         int i;
2953         int idx;
2954         int pbes_per_buf = 0;
2955         u64 buf_addr = 0;
2956         int num_pbes;
2957         struct ocrdma_pbe *pbe;
2958         int total_num_pbes = 0;
2959
2960         if (!hwmr->num_pbes)
2961                 return;
2962
2963         pbe = (struct ocrdma_pbe *)pbl_tbl->va;
2964         num_pbes = 0;
2965
2966         /* go through the OS phy regions & fill hw pbe entries into pbls. */
2967         for (i = 0; i < ib_buf_cnt; i++) {
2968                 buf_addr = buf_list[i].addr;
2969                 pbes_per_buf =
2970                     roundup_pow_of_two(roundup(buf_list[i].size, PAGE_SIZE)) /
2971                     pbe_size;
2972                 hwmr->len += buf_list[i].size;
2973                 /* number of pbes can be more for one OS buf, when
2974                  * buffers are of different sizes.
2975                  * split the ib_buf to one or more pbes.
2976                  */
2977                 for (idx = 0; idx < pbes_per_buf; idx++) {
2978                         /* we program always page aligned addresses,
2979                          * first unaligned address is taken care by fbo.
2980                          */
2981                         if (i == 0) {
2982                                 /* for non zero fbo, assign the
2983                                  * start of the page.
2984                                  */
2985                                 pbe->pa_lo =
2986                                     cpu_to_le32((u32) (buf_addr & PAGE_MASK));
2987                                 pbe->pa_hi =
2988                                     cpu_to_le32((u32) upper_32_bits(buf_addr));
2989                         } else {
2990                                 pbe->pa_lo =
2991                                     cpu_to_le32((u32) (buf_addr & 0xffffffff));
2992                                 pbe->pa_hi =
2993                                     cpu_to_le32((u32) upper_32_bits(buf_addr));
2994                         }
2995                         buf_addr += pbe_size;
2996                         num_pbes += 1;
2997                         total_num_pbes += 1;
2998                         pbe++;
2999
3000                         if (total_num_pbes == hwmr->num_pbes)
3001                                 goto mr_tbl_done;
3002                         /* if the pbl is full storing the pbes,
3003                          * move to next pbl.
3004                          */
3005                         if (num_pbes == (hwmr->pbl_size/sizeof(u64))) {
3006                                 pbl_tbl++;
3007                                 pbe = (struct ocrdma_pbe *)pbl_tbl->va;
3008                                 num_pbes = 0;
3009                         }
3010                 }
3011         }
3012 mr_tbl_done:
3013         return;
3014 }
3015
3016 struct ib_mr *ocrdma_reg_kernel_mr(struct ib_pd *ibpd,
3017                                    struct ib_phys_buf *buf_list,
3018                                    int buf_cnt, int acc, u64 *iova_start)
3019 {
3020         int status = -ENOMEM;
3021         struct ocrdma_mr *mr;
3022         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
3023         struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
3024         u32 num_pbes;
3025         u32 pbe_size = 0;
3026
3027         if ((acc & IB_ACCESS_REMOTE_WRITE) && !(acc & IB_ACCESS_LOCAL_WRITE))
3028                 return ERR_PTR(-EINVAL);
3029
3030         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
3031         if (!mr)
3032                 return ERR_PTR(status);
3033
3034         num_pbes = count_kernel_pbes(buf_list, buf_cnt, &pbe_size);
3035         if (num_pbes == 0) {
3036                 status = -EINVAL;
3037                 goto pbl_err;
3038         }
3039         status = ocrdma_get_pbl_info(dev, mr, num_pbes);
3040         if (status)
3041                 goto pbl_err;
3042
3043         mr->hwmr.pbe_size = pbe_size;
3044         mr->hwmr.fbo = *iova_start - (buf_list[0].addr & PAGE_MASK);
3045         mr->hwmr.va = *iova_start;
3046         mr->hwmr.local_rd = 1;
3047         mr->hwmr.remote_wr = (acc & IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
3048         mr->hwmr.remote_rd = (acc & IB_ACCESS_REMOTE_READ) ? 1 : 0;
3049         mr->hwmr.local_wr = (acc & IB_ACCESS_LOCAL_WRITE) ? 1 : 0;
3050         mr->hwmr.remote_atomic = (acc & IB_ACCESS_REMOTE_ATOMIC) ? 1 : 0;
3051         mr->hwmr.mw_bind = (acc & IB_ACCESS_MW_BIND) ? 1 : 0;
3052
3053         status = ocrdma_build_pbl_tbl(dev, &mr->hwmr);
3054         if (status)
3055                 goto pbl_err;
3056         build_kernel_pbes(buf_list, buf_cnt, pbe_size, mr->hwmr.pbl_table,
3057                           &mr->hwmr);
3058         status = ocrdma_reg_mr(dev, &mr->hwmr, pd->id, acc);
3059         if (status)
3060                 goto mbx_err;
3061
3062         mr->ibmr.lkey = mr->hwmr.lkey;
3063         if (mr->hwmr.remote_wr || mr->hwmr.remote_rd)
3064                 mr->ibmr.rkey = mr->hwmr.lkey;
3065         return &mr->ibmr;
3066
3067 mbx_err:
3068         ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);
3069 pbl_err:
3070         kfree(mr);
3071         return ERR_PTR(status);
3072 }