drivers/infiniband/hw/efa/efa_verbs.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved.
   4  */
   5
   6 #include <linux/vmalloc.h>
   7
   8 #include <rdma/ib_addr.h>
   9 #include <rdma/ib_umem.h>
  10 #include <rdma/ib_user_verbs.h>
  11 #include <rdma/ib_verbs.h>
  12 #include <rdma/uverbs_ioctl.h>
  13
  14 #include "efa.h"
  15
  16 #define EFA_MMAP_FLAG_SHIFT 56
  17 #define EFA_MMAP_PAGE_MASK GENMASK(EFA_MMAP_FLAG_SHIFT - 1, 0)
  18 #define EFA_MMAP_INVALID U64_MAX
  19
  20 enum {
  21         EFA_MMAP_DMA_PAGE = 0,
  22         EFA_MMAP_IO_WC,
  23         EFA_MMAP_IO_NC,
  24 };
  25
  26 #define EFA_AENQ_ENABLED_GROUPS \
  27         (BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
  28          BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
  29
  30 struct efa_mmap_entry {
  31         void  *obj;
  32         u64 address;
  33         u64 length;
  34         u32 mmap_page;
  35         u8 mmap_flag;
  36 };
  37
  38 static inline u64 get_mmap_key(const struct efa_mmap_entry *efa)
  39 {
  40         return ((u64)efa->mmap_flag << EFA_MMAP_FLAG_SHIFT) |
  41                ((u64)efa->mmap_page << PAGE_SHIFT);
  42 }
  43
  44 #define EFA_CHUNK_PAYLOAD_SHIFT       12
  45 #define EFA_CHUNK_PAYLOAD_SIZE        BIT(EFA_CHUNK_PAYLOAD_SHIFT)
  46 #define EFA_CHUNK_PAYLOAD_PTR_SIZE    8
  47
  48 #define EFA_CHUNK_SHIFT               12
  49 #define EFA_CHUNK_SIZE                BIT(EFA_CHUNK_SHIFT)
  50 #define EFA_CHUNK_PTR_SIZE            sizeof(struct efa_com_ctrl_buff_info)
  51
  52 #define EFA_PTRS_PER_CHUNK \
  53         ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
  54
  55 #define EFA_CHUNK_USED_SIZE \
  56         ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
  57
  58 #define EFA_SUPPORTED_ACCESS_FLAGS IB_ACCESS_LOCAL_WRITE
  59
  60 struct pbl_chunk {
  61         dma_addr_t dma_addr;
  62         u64 *buf;
  63         u32 length;
  64 };
  65
  66 struct pbl_chunk_list {
  67         struct pbl_chunk *chunks;
  68         unsigned int size;
  69 };
  70
  71 struct pbl_context {
  72         union {
  73                 struct {
  74                         dma_addr_t dma_addr;
  75                 } continuous;
  76                 struct {
  77                         u32 pbl_buf_size_in_pages;
  78                         struct scatterlist *sgl;
  79                         int sg_dma_cnt;
  80                         struct pbl_chunk_list chunk_list;
  81                 } indirect;
  82         } phys;
  83         u64 *pbl_buf;
  84         u32 pbl_buf_size_in_bytes;
  85         u8 physically_continuous;
  86 };
  87
  88 static inline struct efa_dev *to_edev(struct ib_device *ibdev)
  89 {
  90         return container_of(ibdev, struct efa_dev, ibdev);
  91 }
  92
  93 static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
  94 {
  95         return container_of(ibucontext, struct efa_ucontext, ibucontext);
  96 }
  97
  98 static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
  99 {
 100         return container_of(ibpd, struct efa_pd, ibpd);
 101 }
 102
 103 static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
 104 {
 105         return container_of(ibmr, struct efa_mr, ibmr);
 106 }
 107
 108 static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
 109 {
 110         return container_of(ibqp, struct efa_qp, ibqp);
 111 }
 112
 113 static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
 114 {
 115         return container_of(ibcq, struct efa_cq, ibcq);
 116 }
 117
 118 static inline struct efa_ah *to_eah(struct ib_ah *ibah)
 119 {
 120         return container_of(ibah, struct efa_ah, ibah);
 121 }
 122
 123 #define field_avail(x, fld, sz) (offsetof(typeof(x), fld) + \
 124                                  sizeof(((typeof(x) *)0)->fld) <= (sz))
 125
 126 #define is_reserved_cleared(reserved) \
 127         !memchr_inv(reserved, 0, sizeof(reserved))
 128
 129 static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
 130                                size_t size, enum dma_data_direction dir)
 131 {
 132         void *addr;
 133
 134         addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
 135         if (!addr)
 136                 return NULL;
 137
 138         *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);
 139         if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {
 140                 ibdev_err(&dev->ibdev, "Failed to map DMA address\n");
 141                 free_pages_exact(addr, size);
 142                 return NULL;
 143         }
 144
 145         return addr;
 146 }
 147
 148 /*
 149  * This is only called when the ucontext is destroyed and there can be no
 150  * concurrent query via mmap or allocate on the xarray, thus we can be sure no
 151  * other thread is using the entry pointer. We also know that all the BAR
 152  * pages have either been zap'd or munmaped at this point.  Normal pages are
 153  * refcounted and will be freed at the proper time.
 154  */
 155 static void mmap_entries_remove_free(struct efa_dev *dev,
 156                                      struct efa_ucontext *ucontext)
 157 {
 158         struct efa_mmap_entry *entry;
 159         unsigned long mmap_page;
 160
 161         xa_for_each(&ucontext->mmap_xa, mmap_page, entry) {
 162                 xa_erase(&ucontext->mmap_xa, mmap_page);
 163
 164                 ibdev_dbg(
 165                         &dev->ibdev,
 166                         "mmap: obj[0x%p] key[%#llx] addr[%#llx] len[%#llx] removed\n",
 167                         entry->obj, get_mmap_key(entry), entry->address,
 168                         entry->length);
 169                 if (entry->mmap_flag == EFA_MMAP_DMA_PAGE)
 170                         /* DMA mapping is already gone, now free the pages */
 171                         free_pages_exact(phys_to_virt(entry->address),
 172                                          entry->length);
 173                 kfree(entry);
 174         }
 175 }
 176
 177 static struct efa_mmap_entry *mmap_entry_get(struct efa_dev *dev,
 178                                              struct efa_ucontext *ucontext,
 179                                              u64 key, u64 len)
 180 {
 181         struct efa_mmap_entry *entry;
 182         u64 mmap_page;
 183
 184         mmap_page = (key & EFA_MMAP_PAGE_MASK) >> PAGE_SHIFT;
 185         if (mmap_page > U32_MAX)
 186                 return NULL;
 187
 188         entry = xa_load(&ucontext->mmap_xa, mmap_page);
 189         if (!entry || get_mmap_key(entry) != key || entry->length != len)
 190                 return NULL;
 191
 192         ibdev_dbg(&dev->ibdev,
 193                   "mmap: obj[0x%p] key[%#llx] addr[%#llx] len[%#llx] removed\n",
 194                   entry->obj, key, entry->address, entry->length);
 195
 196         return entry;
 197 }
 198
 199 /*
 200  * Note this locking scheme cannot support removal of entries, except during
 201  * ucontext destruction when the core code guarentees no concurrency.
 202  */
 203 static u64 mmap_entry_insert(struct efa_dev *dev, struct efa_ucontext *ucontext,
 204                              void *obj, u64 address, u64 length, u8 mmap_flag)
 205 {
 206         struct efa_mmap_entry *entry;
 207         int err;
 208
 209         entry = kmalloc(sizeof(*entry), GFP_KERNEL);
 210         if (!entry)
 211                 return EFA_MMAP_INVALID;
 212
 213         entry->obj = obj;
 214         entry->address = address;
 215         entry->length = length;
 216         entry->mmap_flag = mmap_flag;
 217
 218         xa_lock(&ucontext->mmap_xa);
 219         entry->mmap_page = ucontext->mmap_xa_page;
 220         ucontext->mmap_xa_page += DIV_ROUND_UP(length, PAGE_SIZE);
 221         err = __xa_insert(&ucontext->mmap_xa, entry->mmap_page, entry,
 222                           GFP_KERNEL);
 223         xa_unlock(&ucontext->mmap_xa);
 224         if (err){
 225                 kfree(entry);
 226                 return EFA_MMAP_INVALID;
 227         }
 228
 229         ibdev_dbg(
 230                 &dev->ibdev,
 231                 "mmap: obj[0x%p] addr[%#llx], len[%#llx], key[%#llx] inserted\n",
 232                 entry->obj, entry->address, entry->length, get_mmap_key(entry));
 233
 234         return get_mmap_key(entry);
 235 }
 236
 237 int efa_query_device(struct ib_device *ibdev,
 238                      struct ib_device_attr *props,
 239                      struct ib_udata *udata)
 240 {
 241         struct efa_com_get_device_attr_result *dev_attr;
 242         struct efa_ibv_ex_query_device_resp resp = {};
 243         struct efa_dev *dev = to_edev(ibdev);
 244         int err;
 245
 246         if (udata && udata->inlen &&
 247             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 248                 ibdev_dbg(ibdev,
 249                           "Incompatible ABI params, udata not cleared\n");
 250                 return -EINVAL;
 251         }
 252
 253         dev_attr = &dev->dev_attr;
 254
 255         memset(props, 0, sizeof(*props));
 256         props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
 257         props->page_size_cap = dev_attr->page_size_cap;
 258         props->vendor_id = dev->pdev->vendor;
 259         props->vendor_part_id = dev->pdev->device;
 260         props->hw_ver = dev->pdev->subsystem_device;
 261         props->max_qp = dev_attr->max_qp;
 262         props->max_cq = dev_attr->max_cq;
 263         props->max_pd = dev_attr->max_pd;
 264         props->max_mr = dev_attr->max_mr;
 265         props->max_ah = dev_attr->max_ah;
 266         props->max_cqe = dev_attr->max_cq_depth;
 267         props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
 268                                  dev_attr->max_rq_depth);
 269         props->max_send_sge = dev_attr->max_sq_sge;
 270         props->max_recv_sge = dev_attr->max_rq_sge;
 271
 272         if (udata && udata->outlen) {
 273                 resp.max_sq_sge = dev_attr->max_sq_sge;
 274                 resp.max_rq_sge = dev_attr->max_rq_sge;
 275                 resp.max_sq_wr = dev_attr->max_sq_depth;
 276                 resp.max_rq_wr = dev_attr->max_rq_depth;
 277
 278                 err = ib_copy_to_udata(udata, &resp,
 279                                        min(sizeof(resp), udata->outlen));
 280                 if (err) {
 281                         ibdev_dbg(ibdev,
 282                                   "Failed to copy udata for query_device\n");
 283                         return err;
 284                 }
 285         }
 286
 287         return 0;
 288 }
 289
 290 int efa_query_port(struct ib_device *ibdev, u8 port,
 291                    struct ib_port_attr *props)
 292 {
 293         struct efa_dev *dev = to_edev(ibdev);
 294
 295         props->lmc = 1;
 296
 297         props->state = IB_PORT_ACTIVE;
 298         props->phys_state = 5;
 299         props->gid_tbl_len = 1;
 300         props->pkey_tbl_len = 1;
 301         props->active_speed = IB_SPEED_EDR;
 302         props->active_width = IB_WIDTH_4X;
 303         props->max_mtu = ib_mtu_int_to_enum(dev->mtu);
 304         props->active_mtu = ib_mtu_int_to_enum(dev->mtu);
 305         props->max_msg_sz = dev->mtu;
 306         props->max_vl_num = 1;
 307
 308         return 0;
 309 }
 310
 311 int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 312                  int qp_attr_mask,
 313                  struct ib_qp_init_attr *qp_init_attr)
 314 {
 315         struct efa_dev *dev = to_edev(ibqp->device);
 316         struct efa_com_query_qp_params params = {};
 317         struct efa_com_query_qp_result result;
 318         struct efa_qp *qp = to_eqp(ibqp);
 319         int err;
 320
 321 #define EFA_QUERY_QP_SUPP_MASK \
 322         (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
 323          IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP)
 324
 325         if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
 326                 ibdev_dbg(&dev->ibdev,
 327                           "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
 328                           qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
 329                 return -EOPNOTSUPP;
 330         }
 331
 332         memset(qp_attr, 0, sizeof(*qp_attr));
 333         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 334
 335         params.qp_handle = qp->qp_handle;
 336         err = efa_com_query_qp(&dev->edev, &params, &result);
 337         if (err)
 338                 return err;
 339
 340         qp_attr->qp_state = result.qp_state;
 341         qp_attr->qkey = result.qkey;
 342         qp_attr->sq_psn = result.sq_psn;
 343         qp_attr->sq_draining = result.sq_draining;
 344         qp_attr->port_num = 1;
 345
 346         qp_attr->cap.max_send_wr = qp->max_send_wr;
 347         qp_attr->cap.max_recv_wr = qp->max_recv_wr;
 348         qp_attr->cap.max_send_sge = qp->max_send_sge;
 349         qp_attr->cap.max_recv_sge = qp->max_recv_sge;
 350         qp_attr->cap.max_inline_data = qp->max_inline_data;
 351
 352         qp_init_attr->qp_type = ibqp->qp_type;
 353         qp_init_attr->recv_cq = ibqp->recv_cq;
 354         qp_init_attr->send_cq = ibqp->send_cq;
 355         qp_init_attr->qp_context = ibqp->qp_context;
 356         qp_init_attr->cap = qp_attr->cap;
 357
 358         return 0;
 359 }
 360
 361 int efa_query_gid(struct ib_device *ibdev, u8 port, int index,
 362                   union ib_gid *gid)
 363 {
 364         struct efa_dev *dev = to_edev(ibdev);
 365
 366         memcpy(gid->raw, dev->addr, sizeof(dev->addr));
 367
 368         return 0;
 369 }
 370
 371 int efa_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 372                    u16 *pkey)
 373 {
 374         if (index > 0)
 375                 return -EINVAL;
 376
 377         *pkey = 0xffff;
 378         return 0;
 379 }
 380
 381 static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
 382 {
 383         struct efa_com_dealloc_pd_params params = {
 384                 .pdn = pdn,
 385         };
 386
 387         return efa_com_dealloc_pd(&dev->edev, &params);
 388 }
 389
 390 int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 391 {
 392         struct efa_dev *dev = to_edev(ibpd->device);
 393         struct efa_ibv_alloc_pd_resp resp = {};
 394         struct efa_com_alloc_pd_result result;
 395         struct efa_pd *pd = to_epd(ibpd);
 396         int err;
 397
 398         if (udata->inlen &&
 399             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 400                 ibdev_dbg(&dev->ibdev,
 401                           "Incompatible ABI params, udata not cleared\n");
 402                 err = -EINVAL;
 403                 goto err_out;
 404         }
 405
 406         err = efa_com_alloc_pd(&dev->edev, &result);
 407         if (err)
 408                 goto err_out;
 409
 410         pd->pdn = result.pdn;
 411         resp.pdn = result.pdn;
 412
 413         if (udata->outlen) {
 414                 err = ib_copy_to_udata(udata, &resp,
 415                                        min(sizeof(resp), udata->outlen));
 416                 if (err) {
 417                         ibdev_dbg(&dev->ibdev,
 418                                   "Failed to copy udata for alloc_pd\n");
 419                         goto err_dealloc_pd;
 420                 }
 421         }
 422
 423         ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
 424
 425         return 0;
 426
 427 err_dealloc_pd:
 428         efa_pd_dealloc(dev, result.pdn);
 429 err_out:
 430         atomic64_inc(&dev->stats.sw_stats.alloc_pd_err);
 431         return err;
 432 }
 433
 434 void efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 435 {
 436         struct efa_dev *dev = to_edev(ibpd->device);
 437         struct efa_pd *pd = to_epd(ibpd);
 438
 439         if (udata->inlen &&
 440             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 441                 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
 442                 return;
 443         }
 444
 445         ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
 446         efa_pd_dealloc(dev, pd->pdn);
 447 }
 448
 449 static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
 450 {
 451         struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
 452
 453         return efa_com_destroy_qp(&dev->edev, &params);
 454 }
 455
 456 int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
 457 {
 458         struct efa_dev *dev = to_edev(ibqp->pd->device);
 459         struct efa_qp *qp = to_eqp(ibqp);
 460         int err;
 461
 462         if (udata->inlen &&
 463             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 464                 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
 465                 return -EINVAL;
 466         }
 467
 468         ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
 469         err = efa_destroy_qp_handle(dev, qp->qp_handle);
 470         if (err)
 471                 return err;
 472
 473         if (qp->rq_cpu_addr) {
 474                 ibdev_dbg(&dev->ibdev,
 475                           "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
 476                           qp->rq_cpu_addr, qp->rq_size,
 477                           &qp->rq_dma_addr);
 478                 dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
 479                                  DMA_TO_DEVICE);
 480         }
 481
 482         kfree(qp);
 483         return 0;
 484 }
 485
 486 static int qp_mmap_entries_setup(struct efa_qp *qp,
 487                                  struct efa_dev *dev,
 488                                  struct efa_ucontext *ucontext,
 489                                  struct efa_com_create_qp_params *params,
 490                                  struct efa_ibv_create_qp_resp *resp)
 491 {
 492         /*
 493          * Once an entry is inserted it might be mmapped, hence cannot be
 494          * cleaned up until dealloc_ucontext.
 495          */
 496         resp->sq_db_mmap_key =
 497                 mmap_entry_insert(dev, ucontext, qp,
 498                                   dev->db_bar_addr + resp->sq_db_offset,
 499                                   PAGE_SIZE, EFA_MMAP_IO_NC);
 500         if (resp->sq_db_mmap_key == EFA_MMAP_INVALID)
 501                 return -ENOMEM;
 502
 503         resp->sq_db_offset &= ~PAGE_MASK;
 504
 505         resp->llq_desc_mmap_key =
 506                 mmap_entry_insert(dev, ucontext, qp,
 507                                   dev->mem_bar_addr + resp->llq_desc_offset,
 508                                   PAGE_ALIGN(params->sq_ring_size_in_bytes +
 509                                              (resp->llq_desc_offset & ~PAGE_MASK)),
 510                                   EFA_MMAP_IO_WC);
 511         if (resp->llq_desc_mmap_key == EFA_MMAP_INVALID)
 512                 return -ENOMEM;
 513
 514         resp->llq_desc_offset &= ~PAGE_MASK;
 515
 516         if (qp->rq_size) {
 517                 resp->rq_db_mmap_key =
 518                         mmap_entry_insert(dev, ucontext, qp,
 519                                           dev->db_bar_addr + resp->rq_db_offset,
 520                                           PAGE_SIZE, EFA_MMAP_IO_NC);
 521                 if (resp->rq_db_mmap_key == EFA_MMAP_INVALID)
 522                         return -ENOMEM;
 523
 524                 resp->rq_db_offset &= ~PAGE_MASK;
 525
 526                 resp->rq_mmap_key =
 527                         mmap_entry_insert(dev, ucontext, qp,
 528                                           virt_to_phys(qp->rq_cpu_addr),
 529                                           qp->rq_size, EFA_MMAP_DMA_PAGE);
 530                 if (resp->rq_mmap_key == EFA_MMAP_INVALID)
 531                         return -ENOMEM;
 532
 533                 resp->rq_mmap_size = qp->rq_size;
 534         }
 535
 536         return 0;
 537 }
 538
 539 static int efa_qp_validate_cap(struct efa_dev *dev,
 540                                struct ib_qp_init_attr *init_attr)
 541 {
 542         if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {
 543                 ibdev_dbg(&dev->ibdev,
 544                           "qp: requested send wr[%u] exceeds the max[%u]\n",
 545                           init_attr->cap.max_send_wr,
 546                           dev->dev_attr.max_sq_depth);
 547                 return -EINVAL;
 548         }
 549         if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {
 550                 ibdev_dbg(&dev->ibdev,
 551                           "qp: requested receive wr[%u] exceeds the max[%u]\n",
 552                           init_attr->cap.max_recv_wr,
 553                           dev->dev_attr.max_rq_depth);
 554                 return -EINVAL;
 555         }
 556         if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {
 557                 ibdev_dbg(&dev->ibdev,
 558                           "qp: requested sge send[%u] exceeds the max[%u]\n",
 559                           init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);
 560                 return -EINVAL;
 561         }
 562         if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {
 563                 ibdev_dbg(&dev->ibdev,
 564                           "qp: requested sge recv[%u] exceeds the max[%u]\n",
 565                           init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);
 566                 return -EINVAL;
 567         }
 568         if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {
 569                 ibdev_dbg(&dev->ibdev,
 570                           "qp: requested inline data[%u] exceeds the max[%u]\n",
 571                           init_attr->cap.max_inline_data,
 572                           dev->dev_attr.inline_buf_size);
 573                 return -EINVAL;
 574         }
 575
 576         return 0;
 577 }
 578
 579 static int efa_qp_validate_attr(struct efa_dev *dev,
 580                                 struct ib_qp_init_attr *init_attr)
 581 {
 582         if (init_attr->qp_type != IB_QPT_DRIVER &&
 583             init_attr->qp_type != IB_QPT_UD) {
 584                 ibdev_dbg(&dev->ibdev,
 585                           "Unsupported qp type %d\n", init_attr->qp_type);
 586                 return -EOPNOTSUPP;
 587         }
 588
 589         if (init_attr->srq) {
 590                 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");
 591                 return -EOPNOTSUPP;
 592         }
 593
 594         if (init_attr->create_flags) {
 595                 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");
 596                 return -EOPNOTSUPP;
 597         }
 598
 599         return 0;
 600 }
 601
 602 struct ib_qp *efa_create_qp(struct ib_pd *ibpd,
 603                             struct ib_qp_init_attr *init_attr,
 604                             struct ib_udata *udata)
 605 {
 606         struct efa_com_create_qp_params create_qp_params = {};
 607         struct efa_com_create_qp_result create_qp_resp;
 608         struct efa_dev *dev = to_edev(ibpd->device);
 609         struct efa_ibv_create_qp_resp resp = {};
 610         struct efa_ibv_create_qp cmd = {};
 611         bool rq_entry_inserted = false;
 612         struct efa_ucontext *ucontext;
 613         struct efa_qp *qp;
 614         int err;
 615
 616         ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
 617                                              ibucontext);
 618
 619         err = efa_qp_validate_cap(dev, init_attr);
 620         if (err)
 621                 goto err_out;
 622
 623         err = efa_qp_validate_attr(dev, init_attr);
 624         if (err)
 625                 goto err_out;
 626
 627         if (!field_avail(cmd, driver_qp_type, udata->inlen)) {
 628                 ibdev_dbg(&dev->ibdev,
 629                           "Incompatible ABI params, no input udata\n");
 630                 err = -EINVAL;
 631                 goto err_out;
 632         }
 633
 634         if (udata->inlen > sizeof(cmd) &&
 635             !ib_is_udata_cleared(udata, sizeof(cmd),
 636                                  udata->inlen - sizeof(cmd))) {
 637                 ibdev_dbg(&dev->ibdev,
 638                           "Incompatible ABI params, unknown fields in udata\n");
 639                 err = -EINVAL;
 640                 goto err_out;
 641         }
 642
 643         err = ib_copy_from_udata(&cmd, udata,
 644                                  min(sizeof(cmd), udata->inlen));
 645         if (err) {
 646                 ibdev_dbg(&dev->ibdev,
 647                           "Cannot copy udata for create_qp\n");
 648                 goto err_out;
 649         }
 650
 651         if (cmd.comp_mask) {
 652                 ibdev_dbg(&dev->ibdev,
 653                           "Incompatible ABI params, unknown fields in udata\n");
 654                 err = -EINVAL;
 655                 goto err_out;
 656         }
 657
 658         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
 659         if (!qp) {
 660                 err = -ENOMEM;
 661                 goto err_out;
 662         }
 663
 664         create_qp_params.uarn = ucontext->uarn;
 665         create_qp_params.pd = to_epd(ibpd)->pdn;
 666
 667         if (init_attr->qp_type == IB_QPT_UD) {
 668                 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
 669         } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
 670                 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
 671         } else {
 672                 ibdev_dbg(&dev->ibdev,
 673                           "Unsupported qp type %d driver qp type %d\n",
 674                           init_attr->qp_type, cmd.driver_qp_type);
 675                 err = -EOPNOTSUPP;
 676                 goto err_free_qp;
 677         }
 678
 679         ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
 680                   init_attr->qp_type, cmd.driver_qp_type);
 681         create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
 682         create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
 683         create_qp_params.sq_depth = init_attr->cap.max_send_wr;
 684         create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
 685
 686         create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
 687         create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
 688         qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
 689         if (qp->rq_size) {
 690                 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
 691                                                     qp->rq_size, DMA_TO_DEVICE);
 692                 if (!qp->rq_cpu_addr) {
 693                         err = -ENOMEM;
 694                         goto err_free_qp;
 695                 }
 696
 697                 ibdev_dbg(&dev->ibdev,
 698                           "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
 699                           qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
 700                 create_qp_params.rq_base_addr = qp->rq_dma_addr;
 701         }
 702
 703         err = efa_com_create_qp(&dev->edev, &create_qp_params,
 704                                 &create_qp_resp);
 705         if (err)
 706                 goto err_free_mapped;
 707
 708         resp.sq_db_offset = create_qp_resp.sq_db_offset;
 709         resp.rq_db_offset = create_qp_resp.rq_db_offset;
 710         resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
 711         resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
 712         resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
 713
 714         err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
 715                                     &resp);
 716         if (err)
 717                 goto err_destroy_qp;
 718
 719         rq_entry_inserted = true;
 720         qp->qp_handle = create_qp_resp.qp_handle;
 721         qp->ibqp.qp_num = create_qp_resp.qp_num;
 722         qp->ibqp.qp_type = init_attr->qp_type;
 723         qp->max_send_wr = init_attr->cap.max_send_wr;
 724         qp->max_recv_wr = init_attr->cap.max_recv_wr;
 725         qp->max_send_sge = init_attr->cap.max_send_sge;
 726         qp->max_recv_sge = init_attr->cap.max_recv_sge;
 727         qp->max_inline_data = init_attr->cap.max_inline_data;
 728
 729         if (udata->outlen) {
 730                 err = ib_copy_to_udata(udata, &resp,
 731                                        min(sizeof(resp), udata->outlen));
 732                 if (err) {
 733                         ibdev_dbg(&dev->ibdev,
 734                                   "Failed to copy udata for qp[%u]\n",
 735                                   create_qp_resp.qp_num);
 736                         goto err_destroy_qp;
 737                 }
 738         }
 739
 740         ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
 741
 742         return &qp->ibqp;
 743
 744 err_destroy_qp:
 745         efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
 746 err_free_mapped:
 747         if (qp->rq_size) {
 748                 dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
 749                                  DMA_TO_DEVICE);
 750                 if (!rq_entry_inserted)
 751                         free_pages_exact(qp->rq_cpu_addr, qp->rq_size);
 752         }
 753 err_free_qp:
 754         kfree(qp);
 755 err_out:
 756         atomic64_inc(&dev->stats.sw_stats.create_qp_err);
 757         return ERR_PTR(err);
 758 }
 759
 760 static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
 761                                   struct ib_qp_attr *qp_attr, int qp_attr_mask,
 762                                   enum ib_qp_state cur_state,
 763                                   enum ib_qp_state new_state)
 764 {
 765 #define EFA_MODIFY_QP_SUPP_MASK \
 766         (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
 767          IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN)
 768
 769         if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
 770                 ibdev_dbg(&dev->ibdev,
 771                           "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
 772                           qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
 773                 return -EOPNOTSUPP;
 774         }
 775
 776         if (!ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
 777                                 qp_attr_mask)) {
 778                 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
 779                 return -EINVAL;
 780         }
 781
 782         if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
 783                 ibdev_dbg(&dev->ibdev, "Can't change port num\n");
 784                 return -EOPNOTSUPP;
 785         }
 786
 787         if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
 788                 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
 789                 return -EOPNOTSUPP;
 790         }
 791
 792         return 0;
 793 }
 794
 795 int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 796                   int qp_attr_mask, struct ib_udata *udata)
 797 {
 798         struct efa_dev *dev = to_edev(ibqp->device);
 799         struct efa_com_modify_qp_params params = {};
 800         struct efa_qp *qp = to_eqp(ibqp);
 801         enum ib_qp_state cur_state;
 802         enum ib_qp_state new_state;
 803         int err;
 804
 805         if (udata->inlen &&
 806             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 807                 ibdev_dbg(&dev->ibdev,
 808                           "Incompatible ABI params, udata not cleared\n");
 809                 return -EINVAL;
 810         }
 811
 812         cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
 813                                                      qp->state;
 814         new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
 815
 816         err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
 817                                      new_state);
 818         if (err)
 819                 return err;
 820
 821         params.qp_handle = qp->qp_handle;
 822
 823         if (qp_attr_mask & IB_QP_STATE) {
 824                 params.modify_mask |= BIT(EFA_ADMIN_QP_STATE_BIT) |
 825                                       BIT(EFA_ADMIN_CUR_QP_STATE_BIT);
 826                 params.cur_qp_state = qp_attr->cur_qp_state;
 827                 params.qp_state = qp_attr->qp_state;
 828         }
 829
 830         if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
 831                 params.modify_mask |=
 832                         BIT(EFA_ADMIN_SQ_DRAINED_ASYNC_NOTIFY_BIT);
 833                 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
 834         }
 835
 836         if (qp_attr_mask & IB_QP_QKEY) {
 837                 params.modify_mask |= BIT(EFA_ADMIN_QKEY_BIT);
 838                 params.qkey = qp_attr->qkey;
 839         }
 840
 841         if (qp_attr_mask & IB_QP_SQ_PSN) {
 842                 params.modify_mask |= BIT(EFA_ADMIN_SQ_PSN_BIT);
 843                 params.sq_psn = qp_attr->sq_psn;
 844         }
 845
 846         err = efa_com_modify_qp(&dev->edev, &params);
 847         if (err)
 848                 return err;
 849
 850         qp->state = new_state;
 851
 852         return 0;
 853 }
 854
 855 static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
 856 {
 857         struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
 858
 859         return efa_com_destroy_cq(&dev->edev, &params);
 860 }
 861
 862 int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 863 {
 864         struct efa_dev *dev = to_edev(ibcq->device);
 865         struct efa_cq *cq = to_ecq(ibcq);
 866         int err;
 867
 868         if (udata->inlen &&
 869             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 870                 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
 871                 return -EINVAL;
 872         }
 873
 874         ibdev_dbg(&dev->ibdev,
 875                   "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
 876                   cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
 877
 878         err = efa_destroy_cq_idx(dev, cq->cq_idx);
 879         if (err)
 880                 return err;
 881
 882         dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
 883                          DMA_FROM_DEVICE);
 884
 885         kfree(cq);
 886         return 0;
 887 }
 888
 889 static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
 890                                  struct efa_ibv_create_cq_resp *resp)
 891 {
 892         resp->q_mmap_size = cq->size;
 893         resp->q_mmap_key = mmap_entry_insert(dev, cq->ucontext, cq,
 894                                              virt_to_phys(cq->cpu_addr),
 895                                              cq->size, EFA_MMAP_DMA_PAGE);
 896         if (resp->q_mmap_key == EFA_MMAP_INVALID)
 897                 return -ENOMEM;
 898
 899         return 0;
 900 }
 901
 902 static struct ib_cq *do_create_cq(struct ib_device *ibdev, int entries,
 903                                   int vector, struct ib_ucontext *ibucontext,
 904                                   struct ib_udata *udata)
 905 {
 906         struct efa_ibv_create_cq_resp resp = {};
 907         struct efa_com_create_cq_params params;
 908         struct efa_com_create_cq_result result;
 909         struct efa_dev *dev = to_edev(ibdev);
 910         struct efa_ibv_create_cq cmd = {};
 911         bool cq_entry_inserted = false;
 912         struct efa_cq *cq;
 913         int err;
 914
 915         ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
 916
 917         if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
 918                 ibdev_dbg(ibdev,
 919                           "cq: requested entries[%u] non-positive or greater than max[%u]\n",
 920                           entries, dev->dev_attr.max_cq_depth);
 921                 err = -EINVAL;
 922                 goto err_out;
 923         }
 924
 925         if (!field_avail(cmd, num_sub_cqs, udata->inlen)) {
 926                 ibdev_dbg(ibdev,
 927                           "Incompatible ABI params, no input udata\n");
 928                 err = -EINVAL;
 929                 goto err_out;
 930         }
 931
 932         if (udata->inlen > sizeof(cmd) &&
 933             !ib_is_udata_cleared(udata, sizeof(cmd),
 934                                  udata->inlen - sizeof(cmd))) {
 935                 ibdev_dbg(ibdev,
 936                           "Incompatible ABI params, unknown fields in udata\n");
 937                 err = -EINVAL;
 938                 goto err_out;
 939         }
 940
 941         err = ib_copy_from_udata(&cmd, udata,
 942                                  min(sizeof(cmd), udata->inlen));
 943         if (err) {
 944                 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
 945                 goto err_out;
 946         }
 947
 948         if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_50)) {
 949                 ibdev_dbg(ibdev,
 950                           "Incompatible ABI params, unknown fields in udata\n");
 951                 err = -EINVAL;
 952                 goto err_out;
 953         }
 954
 955         if (!cmd.cq_entry_size) {
 956                 ibdev_dbg(ibdev,
 957                           "Invalid entry size [%u]\n", cmd.cq_entry_size);
 958                 err = -EINVAL;
 959                 goto err_out;
 960         }
 961
 962         if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
 963                 ibdev_dbg(ibdev,
 964                           "Invalid number of sub cqs[%u] expected[%u]\n",
 965                           cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
 966                 err = -EINVAL;
 967                 goto err_out;
 968         }
 969
 970         cq = kzalloc(sizeof(*cq), GFP_KERNEL);
 971         if (!cq) {
 972                 err = -ENOMEM;
 973                 goto err_out;
 974         }
 975
 976         cq->ucontext = to_eucontext(ibucontext);
 977         cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
 978         cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
 979                                          DMA_FROM_DEVICE);
 980         if (!cq->cpu_addr) {
 981                 err = -ENOMEM;
 982                 goto err_free_cq;
 983         }
 984
 985         params.uarn = cq->ucontext->uarn;
 986         params.cq_depth = entries;
 987         params.dma_addr = cq->dma_addr;
 988         params.entry_size_in_bytes = cmd.cq_entry_size;
 989         params.num_sub_cqs = cmd.num_sub_cqs;
 990         err = efa_com_create_cq(&dev->edev, &params, &result);
 991         if (err)
 992                 goto err_free_mapped;
 993
 994         resp.cq_idx = result.cq_idx;
 995         cq->cq_idx = result.cq_idx;
 996         cq->ibcq.cqe = result.actual_depth;
 997         WARN_ON_ONCE(entries != result.actual_depth);
 998
 999         err = cq_mmap_entries_setup(dev, cq, &resp);
1000         if (err) {
1001                 ibdev_dbg(ibdev,
1002                           "Could not setup cq[%u] mmap entries\n", cq->cq_idx);
1003                 goto err_destroy_cq;
1004         }
1005
1006         cq_entry_inserted = true;
1007
1008         if (udata->outlen) {
1009                 err = ib_copy_to_udata(udata, &resp,
1010                                        min(sizeof(resp), udata->outlen));
1011                 if (err) {
1012                         ibdev_dbg(ibdev,
1013                                   "Failed to copy udata for create_cq\n");
1014                         goto err_destroy_cq;
1015                 }
1016         }
1017
1018         ibdev_dbg(ibdev,
1019                   "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
1020                   cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
1021
1022         return &cq->ibcq;
1023
1024 err_destroy_cq:
1025         efa_destroy_cq_idx(dev, cq->cq_idx);
1026 err_free_mapped:
1027         dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
1028                          DMA_FROM_DEVICE);
1029         if (!cq_entry_inserted)
1030                 free_pages_exact(cq->cpu_addr, cq->size);
1031 err_free_cq:
1032         kfree(cq);
1033 err_out:
1034         atomic64_inc(&dev->stats.sw_stats.create_cq_err);
1035         return ERR_PTR(err);
1036 }
1037
1038 struct ib_cq *efa_create_cq(struct ib_device *ibdev,
1039                             const struct ib_cq_init_attr *attr,
1040                             struct ib_udata *udata)
1041 {
1042         struct efa_ucontext *ucontext = rdma_udata_to_drv_context(udata,
1043                                                                   struct efa_ucontext,
1044                                                                   ibucontext);
1045
1046         return do_create_cq(ibdev, attr->cqe, attr->comp_vector,
1047                             &ucontext->ibucontext, udata);
1048 }
1049
1050 static int umem_to_page_list(struct efa_dev *dev,
1051                              struct ib_umem *umem,
1052                              u64 *page_list,
1053                              u32 hp_cnt,
1054                              u8 hp_shift)
1055 {
1056         u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
1057         struct sg_dma_page_iter sg_iter;
1058         unsigned int page_idx = 0;
1059         unsigned int hp_idx = 0;
1060
1061         ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
1062                   hp_cnt, pages_in_hp);
1063
1064         for_each_sg_dma_page(umem->sg_head.sgl, &sg_iter, umem->nmap, 0) {
1065                 if (page_idx % pages_in_hp == 0) {
1066                         page_list[hp_idx] = sg_page_iter_dma_address(&sg_iter);
1067                         hp_idx++;
1068                 }
1069
1070                 page_idx++;
1071         }
1072
1073         return 0;
1074 }
1075
1076 static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
1077 {
1078         struct scatterlist *sglist;
1079         struct page *pg;
1080         int i;
1081
1082         sglist = kcalloc(page_cnt, sizeof(*sglist), GFP_KERNEL);
1083         if (!sglist)
1084                 return NULL;
1085         sg_init_table(sglist, page_cnt);
1086         for (i = 0; i < page_cnt; i++) {
1087                 pg = vmalloc_to_page(buf);
1088                 if (!pg)
1089                         goto err;
1090                 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
1091                 buf += PAGE_SIZE / sizeof(*buf);
1092         }
1093         return sglist;
1094
1095 err:
1096         kfree(sglist);
1097         return NULL;
1098 }
1099
1100 /*
1101  * create a chunk list of physical pages dma addresses from the supplied
1102  * scatter gather list
1103  */
1104 static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
1105 {
1106         unsigned int entry, payloads_in_sg, chunk_list_size, chunk_idx, payload_idx;
1107         struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1108         int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
1109         struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
1110         int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
1111         struct efa_com_ctrl_buff_info *ctrl_buf;
1112         u64 *cur_chunk_buf, *prev_chunk_buf;
1113         struct scatterlist *sg;
1114         dma_addr_t dma_addr;
1115         int i;
1116
1117         /* allocate a chunk list that consists of 4KB chunks */
1118         chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
1119
1120         chunk_list->size = chunk_list_size;
1121         chunk_list->chunks = kcalloc(chunk_list_size,
1122                                      sizeof(*chunk_list->chunks),
1123                                      GFP_KERNEL);
1124         if (!chunk_list->chunks)
1125                 return -ENOMEM;
1126
1127         ibdev_dbg(&dev->ibdev,
1128                   "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
1129                   page_cnt);
1130
1131         /* allocate chunk buffers: */
1132         for (i = 0; i < chunk_list_size; i++) {
1133                 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
1134                 if (!chunk_list->chunks[i].buf)
1135                         goto chunk_list_dealloc;
1136
1137                 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
1138         }
1139         chunk_list->chunks[chunk_list_size - 1].length =
1140                 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
1141                         EFA_CHUNK_PTR_SIZE;
1142
1143         /* fill the dma addresses of sg list pages to chunks: */
1144         chunk_idx = 0;
1145         payload_idx = 0;
1146         cur_chunk_buf = chunk_list->chunks[0].buf;
1147         for_each_sg(pages_sgl, sg, sg_dma_cnt, entry) {
1148                 payloads_in_sg = sg_dma_len(sg) >> EFA_CHUNK_PAYLOAD_SHIFT;
1149                 for (i = 0; i < payloads_in_sg; i++) {
1150                         cur_chunk_buf[payload_idx++] =
1151                                 (sg_dma_address(sg) & ~(EFA_CHUNK_PAYLOAD_SIZE - 1)) +
1152                                 (EFA_CHUNK_PAYLOAD_SIZE * i);
1153
1154                         if (payload_idx == EFA_PTRS_PER_CHUNK) {
1155                                 chunk_idx++;
1156                                 cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
1157                                 payload_idx = 0;
1158                         }
1159                 }
1160         }
1161
1162         /* map chunks to dma and fill chunks next ptrs */
1163         for (i = chunk_list_size - 1; i >= 0; i--) {
1164                 dma_addr = dma_map_single(&dev->pdev->dev,
1165                                           chunk_list->chunks[i].buf,
1166                                           chunk_list->chunks[i].length,
1167                                           DMA_TO_DEVICE);
1168                 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1169                         ibdev_err(&dev->ibdev,
1170                                   "chunk[%u] dma_map_failed\n", i);
1171                         goto chunk_list_unmap;
1172                 }
1173
1174                 chunk_list->chunks[i].dma_addr = dma_addr;
1175                 ibdev_dbg(&dev->ibdev,
1176                           "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
1177
1178                 if (!i)
1179                         break;
1180
1181                 prev_chunk_buf = chunk_list->chunks[i - 1].buf;
1182
1183                 ctrl_buf = (struct efa_com_ctrl_buff_info *)
1184                                 &prev_chunk_buf[EFA_PTRS_PER_CHUNK];
1185                 ctrl_buf->length = chunk_list->chunks[i].length;
1186
1187                 efa_com_set_dma_addr(dma_addr,
1188                                      &ctrl_buf->address.mem_addr_high,
1189                                      &ctrl_buf->address.mem_addr_low);
1190         }
1191
1192         return 0;
1193
1194 chunk_list_unmap:
1195         for (; i < chunk_list_size; i++) {
1196                 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1197                                  chunk_list->chunks[i].length, DMA_TO_DEVICE);
1198         }
1199 chunk_list_dealloc:
1200         for (i = 0; i < chunk_list_size; i++)
1201                 kfree(chunk_list->chunks[i].buf);
1202
1203         kfree(chunk_list->chunks);
1204         return -ENOMEM;
1205 }
1206
1207 static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1208 {
1209         struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1210         int i;
1211
1212         for (i = 0; i < chunk_list->size; i++) {
1213                 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1214                                  chunk_list->chunks[i].length, DMA_TO_DEVICE);
1215                 kfree(chunk_list->chunks[i].buf);
1216         }
1217
1218         kfree(chunk_list->chunks);
1219 }
1220
1221 /* initialize pbl continuous mode: map pbl buffer to a dma address. */
1222 static int pbl_continuous_initialize(struct efa_dev *dev,
1223                                      struct pbl_context *pbl)
1224 {
1225         dma_addr_t dma_addr;
1226
1227         dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
1228                                   pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1229         if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1230                 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
1231                 return -ENOMEM;
1232         }
1233
1234         pbl->phys.continuous.dma_addr = dma_addr;
1235         ibdev_dbg(&dev->ibdev,
1236                   "pbl continuous - dma_addr = %pad, size[%u]\n",
1237                   &dma_addr, pbl->pbl_buf_size_in_bytes);
1238
1239         return 0;
1240 }
1241
1242 /*
1243  * initialize pbl indirect mode:
1244  * create a chunk list out of the dma addresses of the physical pages of
1245  * pbl buffer.
1246  */
1247 static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
1248 {
1249         u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, PAGE_SIZE);
1250         struct scatterlist *sgl;
1251         int sg_dma_cnt, err;
1252
1253         BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
1254         sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
1255         if (!sgl)
1256                 return -ENOMEM;
1257
1258         sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1259         if (!sg_dma_cnt) {
1260                 err = -EINVAL;
1261                 goto err_map;
1262         }
1263
1264         pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
1265         pbl->phys.indirect.sgl = sgl;
1266         pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
1267         err = pbl_chunk_list_create(dev, pbl);
1268         if (err) {
1269                 ibdev_dbg(&dev->ibdev,
1270                           "chunk_list creation failed[%d]\n", err);
1271                 goto err_chunk;
1272         }
1273
1274         ibdev_dbg(&dev->ibdev,
1275                   "pbl indirect - size[%u], chunks[%u]\n",
1276                   pbl->pbl_buf_size_in_bytes,
1277                   pbl->phys.indirect.chunk_list.size);
1278
1279         return 0;
1280
1281 err_chunk:
1282         dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1283 err_map:
1284         kfree(sgl);
1285         return err;
1286 }
1287
1288 static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
1289 {
1290         pbl_chunk_list_destroy(dev, pbl);
1291         dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
1292                      pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
1293         kfree(pbl->phys.indirect.sgl);
1294 }
1295
1296 /* create a page buffer list from a mapped user memory region */
1297 static int pbl_create(struct efa_dev *dev,
1298                       struct pbl_context *pbl,
1299                       struct ib_umem *umem,
1300                       int hp_cnt,
1301                       u8 hp_shift)
1302 {
1303         int err;
1304
1305         pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
1306         pbl->pbl_buf = kzalloc(pbl->pbl_buf_size_in_bytes,
1307                                GFP_KERNEL | __GFP_NOWARN);
1308         if (pbl->pbl_buf) {
1309                 pbl->physically_continuous = 1;
1310                 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1311                                         hp_shift);
1312                 if (err)
1313                         goto err_continuous;
1314                 err = pbl_continuous_initialize(dev, pbl);
1315                 if (err)
1316                         goto err_continuous;
1317         } else {
1318                 pbl->physically_continuous = 0;
1319                 pbl->pbl_buf = vzalloc(pbl->pbl_buf_size_in_bytes);
1320                 if (!pbl->pbl_buf)
1321                         return -ENOMEM;
1322
1323                 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1324                                         hp_shift);
1325                 if (err)
1326                         goto err_indirect;
1327                 err = pbl_indirect_initialize(dev, pbl);
1328                 if (err)
1329                         goto err_indirect;
1330         }
1331
1332         ibdev_dbg(&dev->ibdev,
1333                   "user_pbl_created: user_pages[%u], continuous[%u]\n",
1334                   hp_cnt, pbl->physically_continuous);
1335
1336         return 0;
1337
1338 err_continuous:
1339         kfree(pbl->pbl_buf);
1340         return err;
1341 err_indirect:
1342         vfree(pbl->pbl_buf);
1343         return err;
1344 }
1345
1346 static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1347 {
1348         if (pbl->physically_continuous) {
1349                 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
1350                                  pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1351                 kfree(pbl->pbl_buf);
1352         } else {
1353                 pbl_indirect_terminate(dev, pbl);
1354                 vfree(pbl->pbl_buf);
1355         }
1356 }
1357
1358 static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
1359                                  struct efa_com_reg_mr_params *params)
1360 {
1361         int err;
1362
1363         params->inline_pbl = 1;
1364         err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
1365                                 params->page_num, params->page_shift);
1366         if (err)
1367                 return err;
1368
1369         ibdev_dbg(&dev->ibdev,
1370                   "inline_pbl_array - pages[%u]\n", params->page_num);
1371
1372         return 0;
1373 }
1374
1375 static int efa_create_pbl(struct efa_dev *dev,
1376                           struct pbl_context *pbl,
1377                           struct efa_mr *mr,
1378                           struct efa_com_reg_mr_params *params)
1379 {
1380         int err;
1381
1382         err = pbl_create(dev, pbl, mr->umem, params->page_num,
1383                          params->page_shift);
1384         if (err) {
1385                 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
1386                 return err;
1387         }
1388
1389         params->inline_pbl = 0;
1390         params->indirect = !pbl->physically_continuous;
1391         if (pbl->physically_continuous) {
1392                 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
1393
1394                 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
1395                                      &params->pbl.pbl.address.mem_addr_high,
1396                                      &params->pbl.pbl.address.mem_addr_low);
1397         } else {
1398                 params->pbl.pbl.length =
1399                         pbl->phys.indirect.chunk_list.chunks[0].length;
1400
1401                 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
1402                                      &params->pbl.pbl.address.mem_addr_high,
1403                                      &params->pbl.pbl.address.mem_addr_low);
1404         }
1405
1406         return 0;
1407 }
1408
1409 static void efa_cont_pages(struct ib_umem *umem, u64 addr,
1410                            unsigned long max_page_shift,
1411                            int *count, u8 *shift, u32 *ncont)
1412 {
1413         struct scatterlist *sg;
1414         u64 base = ~0, p = 0;
1415         unsigned long tmp;
1416         unsigned long m;
1417         u64 len, pfn;
1418         int i = 0;
1419         int entry;
1420
1421         addr = addr >> PAGE_SHIFT;
1422         tmp = (unsigned long)addr;
1423         m = find_first_bit(&tmp, BITS_PER_LONG);
1424         if (max_page_shift)
1425                 m = min_t(unsigned long, max_page_shift - PAGE_SHIFT, m);
1426
1427         for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
1428                 len = DIV_ROUND_UP(sg_dma_len(sg), PAGE_SIZE);
1429                 pfn = sg_dma_address(sg) >> PAGE_SHIFT;
1430                 if (base + p != pfn) {
1431                         /*
1432                          * If either the offset or the new
1433                          * base are unaligned update m
1434                          */
1435                         tmp = (unsigned long)(pfn | p);
1436                         if (!IS_ALIGNED(tmp, 1 << m))
1437                                 m = find_first_bit(&tmp, BITS_PER_LONG);
1438
1439                         base = pfn;
1440                         p = 0;
1441                 }
1442
1443                 p += len;
1444                 i += len;
1445         }
1446
1447         if (i) {
1448                 m = min_t(unsigned long, ilog2(roundup_pow_of_two(i)), m);
1449                 *ncont = DIV_ROUND_UP(i, (1 << m));
1450         } else {
1451                 m = 0;
1452                 *ncont = 0;
1453         }
1454
1455         *shift = PAGE_SHIFT + m;
1456         *count = i;
1457 }
1458
1459 struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
1460                          u64 virt_addr, int access_flags,
1461                          struct ib_udata *udata)
1462 {
1463         struct efa_dev *dev = to_edev(ibpd->device);
1464         struct efa_com_reg_mr_params params = {};
1465         struct efa_com_reg_mr_result result = {};
1466         unsigned long max_page_shift;
1467         struct pbl_context pbl;
1468         struct efa_mr *mr;
1469         int inline_size;
1470         int npages;
1471         int err;
1472
1473         if (udata->inlen &&
1474             !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
1475                 ibdev_dbg(&dev->ibdev,
1476                           "Incompatible ABI params, udata not cleared\n");
1477                 err = -EINVAL;
1478                 goto err_out;
1479         }
1480
1481         if (access_flags & ~EFA_SUPPORTED_ACCESS_FLAGS) {
1482                 ibdev_dbg(&dev->ibdev,
1483                           "Unsupported access flags[%#x], supported[%#x]\n",
1484                           access_flags, EFA_SUPPORTED_ACCESS_FLAGS);
1485                 err = -EOPNOTSUPP;
1486                 goto err_out;
1487         }
1488
1489         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1490         if (!mr) {
1491                 err = -ENOMEM;
1492                 goto err_out;
1493         }
1494
1495         mr->umem = ib_umem_get(udata, start, length, access_flags, 0);
1496         if (IS_ERR(mr->umem)) {
1497                 err = PTR_ERR(mr->umem);
1498                 ibdev_dbg(&dev->ibdev,
1499                           "Failed to pin and map user space memory[%d]\n", err);
1500                 goto err_free;
1501         }
1502
1503         params.pd = to_epd(ibpd)->pdn;
1504         params.iova = virt_addr;
1505         params.mr_length_in_bytes = length;
1506         params.permissions = access_flags & 0x1;
1507         max_page_shift = fls64(dev->dev_attr.page_size_cap);
1508
1509         efa_cont_pages(mr->umem, start, max_page_shift, &npages,
1510                        &params.page_shift, &params.page_num);
1511         ibdev_dbg(&dev->ibdev,
1512                   "start %#llx length %#llx npages %d params.page_shift %u params.page_num %u\n",
1513                   start, length, npages, params.page_shift, params.page_num);
1514
1515         inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
1516         if (params.page_num <= inline_size) {
1517                 err = efa_create_inline_pbl(dev, mr, &params);
1518                 if (err)
1519                         goto err_unmap;
1520
1521                 err = efa_com_register_mr(&dev->edev, &params, &result);
1522                 if (err)
1523                         goto err_unmap;
1524         } else {
1525                 err = efa_create_pbl(dev, &pbl, mr, &params);
1526                 if (err)
1527                         goto err_unmap;
1528
1529                 err = efa_com_register_mr(&dev->edev, &params, &result);
1530                 pbl_destroy(dev, &pbl);
1531
1532                 if (err)
1533                         goto err_unmap;
1534         }
1535
1536         mr->ibmr.lkey = result.l_key;
1537         mr->ibmr.rkey = result.r_key;
1538         mr->ibmr.length = length;
1539         ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
1540
1541         return &mr->ibmr;
1542
1543 err_unmap:
1544         ib_umem_release(mr->umem);
1545 err_free:
1546         kfree(mr);
1547 err_out:
1548         atomic64_inc(&dev->stats.sw_stats.reg_mr_err);
1549         return ERR_PTR(err);
1550 }
1551
1552 int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
1553 {
1554         struct efa_dev *dev = to_edev(ibmr->device);
1555         struct efa_com_dereg_mr_params params;
1556         struct efa_mr *mr = to_emr(ibmr);
1557         int err;
1558
1559         if (udata->inlen &&
1560             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1561                 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
1562                 return -EINVAL;
1563         }
1564
1565         ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
1566
1567         if (mr->umem) {
1568                 params.l_key = mr->ibmr.lkey;
1569                 err = efa_com_dereg_mr(&dev->edev, &params);
1570                 if (err)
1571                         return err;
1572                 ib_umem_release(mr->umem);
1573         }
1574
1575         kfree(mr);
1576
1577         return 0;
1578 }
1579
1580 int efa_get_port_immutable(struct ib_device *ibdev, u8 port_num,
1581                            struct ib_port_immutable *immutable)
1582 {
1583         struct ib_port_attr attr;
1584         int err;
1585
1586         err = ib_query_port(ibdev, port_num, &attr);
1587         if (err) {
1588                 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
1589                 return err;
1590         }
1591
1592         immutable->pkey_tbl_len = attr.pkey_tbl_len;
1593         immutable->gid_tbl_len = attr.gid_tbl_len;
1594
1595         return 0;
1596 }
1597
1598 static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
1599 {
1600         struct efa_com_dealloc_uar_params params = {
1601                 .uarn = uarn,
1602         };
1603
1604         return efa_com_dealloc_uar(&dev->edev, &params);
1605 }
1606
1607 int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
1608 {
1609         struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1610         struct efa_dev *dev = to_edev(ibucontext->device);
1611         struct efa_ibv_alloc_ucontext_resp resp = {};
1612         struct efa_com_alloc_uar_result result;
1613         int err;
1614
1615         /*
1616          * it's fine if the driver does not know all request fields,
1617          * we will ack input fields in our response.
1618          */
1619
1620         err = efa_com_alloc_uar(&dev->edev, &result);
1621         if (err)
1622                 goto err_out;
1623
1624         ucontext->uarn = result.uarn;
1625         xa_init(&ucontext->mmap_xa);
1626
1627         resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
1628         resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
1629         resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
1630         resp.inline_buf_size = dev->dev_attr.inline_buf_size;
1631         resp.max_llq_size = dev->dev_attr.max_llq_size;
1632
1633         if (udata && udata->outlen) {
1634                 err = ib_copy_to_udata(udata, &resp,
1635                                        min(sizeof(resp), udata->outlen));
1636                 if (err)
1637                         goto err_dealloc_uar;
1638         }
1639
1640         return 0;
1641
1642 err_dealloc_uar:
1643         efa_dealloc_uar(dev, result.uarn);
1644 err_out:
1645         atomic64_inc(&dev->stats.sw_stats.alloc_ucontext_err);
1646         return err;
1647 }
1648
1649 void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
1650 {
1651         struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1652         struct efa_dev *dev = to_edev(ibucontext->device);
1653
1654         mmap_entries_remove_free(dev, ucontext);
1655         efa_dealloc_uar(dev, ucontext->uarn);
1656 }
1657
1658 static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
1659                       struct vm_area_struct *vma, u64 key, u64 length)
1660 {
1661         struct efa_mmap_entry *entry;
1662         unsigned long va;
1663         u64 pfn;
1664         int err;
1665
1666         entry = mmap_entry_get(dev, ucontext, key, length);
1667         if (!entry) {
1668                 ibdev_dbg(&dev->ibdev, "key[%#llx] does not have valid entry\n",
1669                           key);
1670                 return -EINVAL;
1671         }
1672
1673         ibdev_dbg(&dev->ibdev,
1674                   "Mapping address[%#llx], length[%#llx], mmap_flag[%d]\n",
1675                   entry->address, length, entry->mmap_flag);
1676
1677         pfn = entry->address >> PAGE_SHIFT;
1678         switch (entry->mmap_flag) {
1679         case EFA_MMAP_IO_NC:
1680                 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, length,
1681                                         pgprot_noncached(vma->vm_page_prot));
1682                 break;
1683         case EFA_MMAP_IO_WC:
1684                 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, length,
1685                                         pgprot_writecombine(vma->vm_page_prot));
1686                 break;
1687         case EFA_MMAP_DMA_PAGE:
1688                 for (va = vma->vm_start; va < vma->vm_end;
1689                      va += PAGE_SIZE, pfn++) {
1690                         err = vm_insert_page(vma, va, pfn_to_page(pfn));
1691                         if (err)
1692                                 break;
1693                 }
1694                 break;
1695         default:
1696                 err = -EINVAL;
1697         }
1698
1699         if (err)
1700                 ibdev_dbg(
1701                         &dev->ibdev,
1702                         "Couldn't mmap address[%#llx] length[%#llx] mmap_flag[%d] err[%d]\n",
1703                         entry->address, length, entry->mmap_flag, err);
1704
1705         return err;
1706 }
1707
1708 int efa_mmap(struct ib_ucontext *ibucontext,
1709              struct vm_area_struct *vma)
1710 {
1711         struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1712         struct efa_dev *dev = to_edev(ibucontext->device);
1713         u64 length = vma->vm_end - vma->vm_start;
1714         u64 key = vma->vm_pgoff << PAGE_SHIFT;
1715
1716         ibdev_dbg(&dev->ibdev,
1717                   "start %#lx, end %#lx, length = %#llx, key = %#llx\n",
1718                   vma->vm_start, vma->vm_end, length, key);
1719
1720         if (length % PAGE_SIZE != 0 || !(vma->vm_flags & VM_SHARED)) {
1721                 ibdev_dbg(&dev->ibdev,
1722                           "length[%#llx] is not page size aligned[%#lx] or VM_SHARED is not set [%#lx]\n",
1723                           length, PAGE_SIZE, vma->vm_flags);
1724                 return -EINVAL;
1725         }
1726
1727         if (vma->vm_flags & VM_EXEC) {
1728                 ibdev_dbg(&dev->ibdev, "Mapping executable pages is not permitted\n");
1729                 return -EPERM;
1730         }
1731         vma->vm_flags &= ~VM_MAYEXEC;
1732
1733         return __efa_mmap(dev, ucontext, vma, key, length);
1734 }
1735
1736 static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
1737 {
1738         struct efa_com_destroy_ah_params params = {
1739                 .ah = ah->ah,
1740                 .pdn = to_epd(ah->ibah.pd)->pdn,
1741         };
1742
1743         return efa_com_destroy_ah(&dev->edev, &params);
1744 }
1745
1746 int efa_create_ah(struct ib_ah *ibah,
1747                   struct rdma_ah_attr *ah_attr,
1748                   u32 flags,
1749                   struct ib_udata *udata)
1750 {
1751         struct efa_dev *dev = to_edev(ibah->device);
1752         struct efa_com_create_ah_params params = {};
1753         struct efa_ibv_create_ah_resp resp = {};
1754         struct efa_com_create_ah_result result;
1755         struct efa_ah *ah = to_eah(ibah);
1756         int err;
1757
1758         if (!(flags & RDMA_CREATE_AH_SLEEPABLE)) {
1759                 ibdev_dbg(&dev->ibdev,
1760                           "Create address handle is not supported in atomic context\n");
1761                 err = -EOPNOTSUPP;
1762                 goto err_out;
1763         }
1764
1765         if (udata->inlen &&
1766             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1767                 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
1768                 err = -EINVAL;
1769                 goto err_out;
1770         }
1771
1772         memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
1773                sizeof(params.dest_addr));
1774         params.pdn = to_epd(ibah->pd)->pdn;
1775         err = efa_com_create_ah(&dev->edev, &params, &result);
1776         if (err)
1777                 goto err_out;
1778
1779         memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
1780         ah->ah = result.ah;
1781
1782         resp.efa_address_handle = result.ah;
1783
1784         if (udata->outlen) {
1785                 err = ib_copy_to_udata(udata, &resp,
1786                                        min(sizeof(resp), udata->outlen));
1787                 if (err) {
1788                         ibdev_dbg(&dev->ibdev,
1789                                   "Failed to copy udata for create_ah response\n");
1790                         goto err_destroy_ah;
1791                 }
1792         }
1793         ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
1794
1795         return 0;
1796
1797 err_destroy_ah:
1798         efa_ah_destroy(dev, ah);
1799 err_out:
1800         atomic64_inc(&dev->stats.sw_stats.create_ah_err);
1801         return err;
1802 }
1803
1804 void efa_destroy_ah(struct ib_ah *ibah, u32 flags)
1805 {
1806         struct efa_dev *dev = to_edev(ibah->pd->device);
1807         struct efa_ah *ah = to_eah(ibah);
1808
1809         ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
1810
1811         if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
1812                 ibdev_dbg(&dev->ibdev,
1813                           "Destroy address handle is not supported in atomic context\n");
1814                 return;
1815         }
1816
1817         efa_ah_destroy(dev, ah);
1818 }
1819
1820 enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
1821                                          u8 port_num)
1822 {
1823         return IB_LINK_LAYER_UNSPECIFIED;
1824 }
1825