drivers/infiniband/hw/efa/efa_verbs.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright 2018-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
   4  */
   5
   6 #include <linux/vmalloc.h>
   7 #include <linux/log2.h>
   8
   9 #include <rdma/ib_addr.h>
  10 #include <rdma/ib_umem.h>
  11 #include <rdma/ib_user_verbs.h>
  12 #include <rdma/ib_verbs.h>
  13 #include <rdma/uverbs_ioctl.h>
  14
  15 #include "efa.h"
  16
  17 enum {
  18         EFA_MMAP_DMA_PAGE = 0,
  19         EFA_MMAP_IO_WC,
  20         EFA_MMAP_IO_NC,
  21 };
  22
  23 #define EFA_AENQ_ENABLED_GROUPS \
  24         (BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
  25          BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
  26
  27 struct efa_user_mmap_entry {
  28         struct rdma_user_mmap_entry rdma_entry;
  29         u64 address;
  30         u8 mmap_flag;
  31 };
  32
  33 #define EFA_DEFINE_STATS(op) \
  34         op(EFA_TX_BYTES, "tx_bytes") \
  35         op(EFA_TX_PKTS, "tx_pkts") \
  36         op(EFA_RX_BYTES, "rx_bytes") \
  37         op(EFA_RX_PKTS, "rx_pkts") \
  38         op(EFA_RX_DROPS, "rx_drops") \
  39         op(EFA_SEND_BYTES, "send_bytes") \
  40         op(EFA_SEND_WRS, "send_wrs") \
  41         op(EFA_RECV_BYTES, "recv_bytes") \
  42         op(EFA_RECV_WRS, "recv_wrs") \
  43         op(EFA_RDMA_READ_WRS, "rdma_read_wrs") \
  44         op(EFA_RDMA_READ_BYTES, "rdma_read_bytes") \
  45         op(EFA_RDMA_READ_WR_ERR, "rdma_read_wr_err") \
  46         op(EFA_RDMA_READ_RESP_BYTES, "rdma_read_resp_bytes") \
  47         op(EFA_SUBMITTED_CMDS, "submitted_cmds") \
  48         op(EFA_COMPLETED_CMDS, "completed_cmds") \
  49         op(EFA_CMDS_ERR, "cmds_err") \
  50         op(EFA_NO_COMPLETION_CMDS, "no_completion_cmds") \
  51         op(EFA_KEEP_ALIVE_RCVD, "keep_alive_rcvd") \
  52         op(EFA_ALLOC_PD_ERR, "alloc_pd_err") \
  53         op(EFA_CREATE_QP_ERR, "create_qp_err") \
  54         op(EFA_CREATE_CQ_ERR, "create_cq_err") \
  55         op(EFA_REG_MR_ERR, "reg_mr_err") \
  56         op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \
  57         op(EFA_CREATE_AH_ERR, "create_ah_err") \
  58         op(EFA_MMAP_ERR, "mmap_err")
  59
  60 #define EFA_STATS_ENUM(ename, name) ename,
  61 #define EFA_STATS_STR(ename, name) [ename] = name,
  62
  63 enum efa_hw_stats {
  64         EFA_DEFINE_STATS(EFA_STATS_ENUM)
  65 };
  66
  67 static const char *const efa_stats_names[] = {
  68         EFA_DEFINE_STATS(EFA_STATS_STR)
  69 };
  70
  71 #define EFA_CHUNK_PAYLOAD_SHIFT       12
  72 #define EFA_CHUNK_PAYLOAD_SIZE        BIT(EFA_CHUNK_PAYLOAD_SHIFT)
  73 #define EFA_CHUNK_PAYLOAD_PTR_SIZE    8
  74
  75 #define EFA_CHUNK_SHIFT               12
  76 #define EFA_CHUNK_SIZE                BIT(EFA_CHUNK_SHIFT)
  77 #define EFA_CHUNK_PTR_SIZE            sizeof(struct efa_com_ctrl_buff_info)
  78
  79 #define EFA_PTRS_PER_CHUNK \
  80         ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
  81
  82 #define EFA_CHUNK_USED_SIZE \
  83         ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
  84
  85 struct pbl_chunk {
  86         dma_addr_t dma_addr;
  87         u64 *buf;
  88         u32 length;
  89 };
  90
  91 struct pbl_chunk_list {
  92         struct pbl_chunk *chunks;
  93         unsigned int size;
  94 };
  95
  96 struct pbl_context {
  97         union {
  98                 struct {
  99                         dma_addr_t dma_addr;
 100                 } continuous;
 101                 struct {
 102                         u32 pbl_buf_size_in_pages;
 103                         struct scatterlist *sgl;
 104                         int sg_dma_cnt;
 105                         struct pbl_chunk_list chunk_list;
 106                 } indirect;
 107         } phys;
 108         u64 *pbl_buf;
 109         u32 pbl_buf_size_in_bytes;
 110         u8 physically_continuous;
 111 };
 112
 113 static inline struct efa_dev *to_edev(struct ib_device *ibdev)
 114 {
 115         return container_of(ibdev, struct efa_dev, ibdev);
 116 }
 117
 118 static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
 119 {
 120         return container_of(ibucontext, struct efa_ucontext, ibucontext);
 121 }
 122
 123 static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
 124 {
 125         return container_of(ibpd, struct efa_pd, ibpd);
 126 }
 127
 128 static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
 129 {
 130         return container_of(ibmr, struct efa_mr, ibmr);
 131 }
 132
 133 static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
 134 {
 135         return container_of(ibqp, struct efa_qp, ibqp);
 136 }
 137
 138 static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
 139 {
 140         return container_of(ibcq, struct efa_cq, ibcq);
 141 }
 142
 143 static inline struct efa_ah *to_eah(struct ib_ah *ibah)
 144 {
 145         return container_of(ibah, struct efa_ah, ibah);
 146 }
 147
 148 static inline struct efa_user_mmap_entry *
 149 to_emmap(struct rdma_user_mmap_entry *rdma_entry)
 150 {
 151         return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry);
 152 }
 153
 154 #define EFA_DEV_CAP(dev, cap) \
 155         ((dev)->dev_attr.device_caps & \
 156          EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_##cap##_MASK)
 157
 158 #define is_reserved_cleared(reserved) \
 159         !memchr_inv(reserved, 0, sizeof(reserved))
 160
 161 static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
 162                                size_t size, enum dma_data_direction dir)
 163 {
 164         void *addr;
 165
 166         addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
 167         if (!addr)
 168                 return NULL;
 169
 170         *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);
 171         if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {
 172                 ibdev_err(&dev->ibdev, "Failed to map DMA address\n");
 173                 free_pages_exact(addr, size);
 174                 return NULL;
 175         }
 176
 177         return addr;
 178 }
 179
 180 static void efa_free_mapped(struct efa_dev *dev, void *cpu_addr,
 181                             dma_addr_t dma_addr,
 182                             size_t size, enum dma_data_direction dir)
 183 {
 184         dma_unmap_single(&dev->pdev->dev, dma_addr, size, dir);
 185         free_pages_exact(cpu_addr, size);
 186 }
 187
 188 int efa_query_device(struct ib_device *ibdev,
 189                      struct ib_device_attr *props,
 190                      struct ib_udata *udata)
 191 {
 192         struct efa_com_get_device_attr_result *dev_attr;
 193         struct efa_ibv_ex_query_device_resp resp = {};
 194         struct efa_dev *dev = to_edev(ibdev);
 195         int err;
 196
 197         if (udata && udata->inlen &&
 198             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 199                 ibdev_dbg(ibdev,
 200                           "Incompatible ABI params, udata not cleared\n");
 201                 return -EINVAL;
 202         }
 203
 204         dev_attr = &dev->dev_attr;
 205
 206         memset(props, 0, sizeof(*props));
 207         props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
 208         props->page_size_cap = dev_attr->page_size_cap;
 209         props->vendor_id = dev->pdev->vendor;
 210         props->vendor_part_id = dev->pdev->device;
 211         props->hw_ver = dev->pdev->subsystem_device;
 212         props->max_qp = dev_attr->max_qp;
 213         props->max_cq = dev_attr->max_cq;
 214         props->max_pd = dev_attr->max_pd;
 215         props->max_mr = dev_attr->max_mr;
 216         props->max_ah = dev_attr->max_ah;
 217         props->max_cqe = dev_attr->max_cq_depth;
 218         props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
 219                                  dev_attr->max_rq_depth);
 220         props->max_send_sge = dev_attr->max_sq_sge;
 221         props->max_recv_sge = dev_attr->max_rq_sge;
 222         props->max_sge_rd = dev_attr->max_wr_rdma_sge;
 223         props->max_pkeys = 1;
 224
 225         if (udata && udata->outlen) {
 226                 resp.max_sq_sge = dev_attr->max_sq_sge;
 227                 resp.max_rq_sge = dev_attr->max_rq_sge;
 228                 resp.max_sq_wr = dev_attr->max_sq_depth;
 229                 resp.max_rq_wr = dev_attr->max_rq_depth;
 230                 resp.max_rdma_size = dev_attr->max_rdma_size;
 231
 232                 if (EFA_DEV_CAP(dev, RDMA_READ))
 233                         resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ;
 234
 235                 if (EFA_DEV_CAP(dev, RNR_RETRY))
 236                         resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY;
 237
 238                 err = ib_copy_to_udata(udata, &resp,
 239                                        min(sizeof(resp), udata->outlen));
 240                 if (err) {
 241                         ibdev_dbg(ibdev,
 242                                   "Failed to copy udata for query_device\n");
 243                         return err;
 244                 }
 245         }
 246
 247         return 0;
 248 }
 249
 250 int efa_query_port(struct ib_device *ibdev, u8 port,
 251                    struct ib_port_attr *props)
 252 {
 253         struct efa_dev *dev = to_edev(ibdev);
 254
 255         props->lmc = 1;
 256
 257         props->state = IB_PORT_ACTIVE;
 258         props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
 259         props->gid_tbl_len = 1;
 260         props->pkey_tbl_len = 1;
 261         props->active_speed = IB_SPEED_EDR;
 262         props->active_width = IB_WIDTH_4X;
 263         props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
 264         props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
 265         props->max_msg_sz = dev->dev_attr.mtu;
 266         props->max_vl_num = 1;
 267
 268         return 0;
 269 }
 270
 271 int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 272                  int qp_attr_mask,
 273                  struct ib_qp_init_attr *qp_init_attr)
 274 {
 275         struct efa_dev *dev = to_edev(ibqp->device);
 276         struct efa_com_query_qp_params params = {};
 277         struct efa_com_query_qp_result result;
 278         struct efa_qp *qp = to_eqp(ibqp);
 279         int err;
 280
 281 #define EFA_QUERY_QP_SUPP_MASK \
 282         (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
 283          IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP | IB_QP_RNR_RETRY)
 284
 285         if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
 286                 ibdev_dbg(&dev->ibdev,
 287                           "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
 288                           qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
 289                 return -EOPNOTSUPP;
 290         }
 291
 292         memset(qp_attr, 0, sizeof(*qp_attr));
 293         memset(qp_init_attr, 0, sizeof(*qp_init_attr));
 294
 295         params.qp_handle = qp->qp_handle;
 296         err = efa_com_query_qp(&dev->edev, &params, &result);
 297         if (err)
 298                 return err;
 299
 300         qp_attr->qp_state = result.qp_state;
 301         qp_attr->qkey = result.qkey;
 302         qp_attr->sq_psn = result.sq_psn;
 303         qp_attr->sq_draining = result.sq_draining;
 304         qp_attr->port_num = 1;
 305         qp_attr->rnr_retry = result.rnr_retry;
 306
 307         qp_attr->cap.max_send_wr = qp->max_send_wr;
 308         qp_attr->cap.max_recv_wr = qp->max_recv_wr;
 309         qp_attr->cap.max_send_sge = qp->max_send_sge;
 310         qp_attr->cap.max_recv_sge = qp->max_recv_sge;
 311         qp_attr->cap.max_inline_data = qp->max_inline_data;
 312
 313         qp_init_attr->qp_type = ibqp->qp_type;
 314         qp_init_attr->recv_cq = ibqp->recv_cq;
 315         qp_init_attr->send_cq = ibqp->send_cq;
 316         qp_init_attr->qp_context = ibqp->qp_context;
 317         qp_init_attr->cap = qp_attr->cap;
 318
 319         return 0;
 320 }
 321
 322 int efa_query_gid(struct ib_device *ibdev, u8 port, int index,
 323                   union ib_gid *gid)
 324 {
 325         struct efa_dev *dev = to_edev(ibdev);
 326
 327         memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr));
 328
 329         return 0;
 330 }
 331
 332 int efa_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 333                    u16 *pkey)
 334 {
 335         if (index > 0)
 336                 return -EINVAL;
 337
 338         *pkey = 0xffff;
 339         return 0;
 340 }
 341
 342 static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
 343 {
 344         struct efa_com_dealloc_pd_params params = {
 345                 .pdn = pdn,
 346         };
 347
 348         return efa_com_dealloc_pd(&dev->edev, &params);
 349 }
 350
 351 int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 352 {
 353         struct efa_dev *dev = to_edev(ibpd->device);
 354         struct efa_ibv_alloc_pd_resp resp = {};
 355         struct efa_com_alloc_pd_result result;
 356         struct efa_pd *pd = to_epd(ibpd);
 357         int err;
 358
 359         if (udata->inlen &&
 360             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 361                 ibdev_dbg(&dev->ibdev,
 362                           "Incompatible ABI params, udata not cleared\n");
 363                 err = -EINVAL;
 364                 goto err_out;
 365         }
 366
 367         err = efa_com_alloc_pd(&dev->edev, &result);
 368         if (err)
 369                 goto err_out;
 370
 371         pd->pdn = result.pdn;
 372         resp.pdn = result.pdn;
 373
 374         if (udata->outlen) {
 375                 err = ib_copy_to_udata(udata, &resp,
 376                                        min(sizeof(resp), udata->outlen));
 377                 if (err) {
 378                         ibdev_dbg(&dev->ibdev,
 379                                   "Failed to copy udata for alloc_pd\n");
 380                         goto err_dealloc_pd;
 381                 }
 382         }
 383
 384         ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
 385
 386         return 0;
 387
 388 err_dealloc_pd:
 389         efa_pd_dealloc(dev, result.pdn);
 390 err_out:
 391         atomic64_inc(&dev->stats.alloc_pd_err);
 392         return err;
 393 }
 394
 395 int efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 396 {
 397         struct efa_dev *dev = to_edev(ibpd->device);
 398         struct efa_pd *pd = to_epd(ibpd);
 399
 400         ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
 401         efa_pd_dealloc(dev, pd->pdn);
 402         return 0;
 403 }
 404
 405 static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
 406 {
 407         struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
 408
 409         return efa_com_destroy_qp(&dev->edev, &params);
 410 }
 411
 412 static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp)
 413 {
 414         rdma_user_mmap_entry_remove(qp->rq_mmap_entry);
 415         rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry);
 416         rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry);
 417         rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry);
 418 }
 419
 420 int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
 421 {
 422         struct efa_dev *dev = to_edev(ibqp->pd->device);
 423         struct efa_qp *qp = to_eqp(ibqp);
 424         int err;
 425
 426         ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
 427
 428         efa_qp_user_mmap_entries_remove(qp);
 429
 430         err = efa_destroy_qp_handle(dev, qp->qp_handle);
 431         if (err)
 432                 return err;
 433
 434         if (qp->rq_cpu_addr) {
 435                 ibdev_dbg(&dev->ibdev,
 436                           "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
 437                           qp->rq_cpu_addr, qp->rq_size,
 438                           &qp->rq_dma_addr);
 439                 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
 440                                 qp->rq_size, DMA_TO_DEVICE);
 441         }
 442
 443         kfree(qp);
 444         return 0;
 445 }
 446
 447 static struct rdma_user_mmap_entry*
 448 efa_user_mmap_entry_insert(struct ib_ucontext *ucontext,
 449                            u64 address, size_t length,
 450                            u8 mmap_flag, u64 *offset)
 451 {
 452         struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 453         int err;
 454
 455         if (!entry)
 456                 return NULL;
 457
 458         entry->address = address;
 459         entry->mmap_flag = mmap_flag;
 460
 461         err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry,
 462                                           length);
 463         if (err) {
 464                 kfree(entry);
 465                 return NULL;
 466         }
 467         *offset = rdma_user_mmap_get_offset(&entry->rdma_entry);
 468
 469         return &entry->rdma_entry;
 470 }
 471
 472 static int qp_mmap_entries_setup(struct efa_qp *qp,
 473                                  struct efa_dev *dev,
 474                                  struct efa_ucontext *ucontext,
 475                                  struct efa_com_create_qp_params *params,
 476                                  struct efa_ibv_create_qp_resp *resp)
 477 {
 478         size_t length;
 479         u64 address;
 480
 481         address = dev->db_bar_addr + resp->sq_db_offset;
 482         qp->sq_db_mmap_entry =
 483                 efa_user_mmap_entry_insert(&ucontext->ibucontext,
 484                                            address,
 485                                            PAGE_SIZE, EFA_MMAP_IO_NC,
 486                                            &resp->sq_db_mmap_key);
 487         if (!qp->sq_db_mmap_entry)
 488                 return -ENOMEM;
 489
 490         resp->sq_db_offset &= ~PAGE_MASK;
 491
 492         address = dev->mem_bar_addr + resp->llq_desc_offset;
 493         length = PAGE_ALIGN(params->sq_ring_size_in_bytes +
 494                             (resp->llq_desc_offset & ~PAGE_MASK));
 495
 496         qp->llq_desc_mmap_entry =
 497                 efa_user_mmap_entry_insert(&ucontext->ibucontext,
 498                                            address, length,
 499                                            EFA_MMAP_IO_WC,
 500                                            &resp->llq_desc_mmap_key);
 501         if (!qp->llq_desc_mmap_entry)
 502                 goto err_remove_mmap;
 503
 504         resp->llq_desc_offset &= ~PAGE_MASK;
 505
 506         if (qp->rq_size) {
 507                 address = dev->db_bar_addr + resp->rq_db_offset;
 508
 509                 qp->rq_db_mmap_entry =
 510                         efa_user_mmap_entry_insert(&ucontext->ibucontext,
 511                                                    address, PAGE_SIZE,
 512                                                    EFA_MMAP_IO_NC,
 513                                                    &resp->rq_db_mmap_key);
 514                 if (!qp->rq_db_mmap_entry)
 515                         goto err_remove_mmap;
 516
 517                 resp->rq_db_offset &= ~PAGE_MASK;
 518
 519                 address = virt_to_phys(qp->rq_cpu_addr);
 520                 qp->rq_mmap_entry =
 521                         efa_user_mmap_entry_insert(&ucontext->ibucontext,
 522                                                    address, qp->rq_size,
 523                                                    EFA_MMAP_DMA_PAGE,
 524                                                    &resp->rq_mmap_key);
 525                 if (!qp->rq_mmap_entry)
 526                         goto err_remove_mmap;
 527
 528                 resp->rq_mmap_size = qp->rq_size;
 529         }
 530
 531         return 0;
 532
 533 err_remove_mmap:
 534         efa_qp_user_mmap_entries_remove(qp);
 535
 536         return -ENOMEM;
 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         struct efa_ucontext *ucontext;
 612         struct efa_qp *qp;
 613         int err;
 614
 615         ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
 616                                              ibucontext);
 617
 618         err = efa_qp_validate_cap(dev, init_attr);
 619         if (err)
 620                 goto err_out;
 621
 622         err = efa_qp_validate_attr(dev, init_attr);
 623         if (err)
 624                 goto err_out;
 625
 626         if (offsetofend(typeof(cmd), driver_qp_type) > udata->inlen) {
 627                 ibdev_dbg(&dev->ibdev,
 628                           "Incompatible ABI params, no input udata\n");
 629                 err = -EINVAL;
 630                 goto err_out;
 631         }
 632
 633         if (udata->inlen > sizeof(cmd) &&
 634             !ib_is_udata_cleared(udata, sizeof(cmd),
 635                                  udata->inlen - sizeof(cmd))) {
 636                 ibdev_dbg(&dev->ibdev,
 637                           "Incompatible ABI params, unknown fields in udata\n");
 638                 err = -EINVAL;
 639                 goto err_out;
 640         }
 641
 642         err = ib_copy_from_udata(&cmd, udata,
 643                                  min(sizeof(cmd), udata->inlen));
 644         if (err) {
 645                 ibdev_dbg(&dev->ibdev,
 646                           "Cannot copy udata for create_qp\n");
 647                 goto err_out;
 648         }
 649
 650         if (cmd.comp_mask) {
 651                 ibdev_dbg(&dev->ibdev,
 652                           "Incompatible ABI params, unknown fields in udata\n");
 653                 err = -EINVAL;
 654                 goto err_out;
 655         }
 656
 657         qp = kzalloc(sizeof(*qp), GFP_KERNEL);
 658         if (!qp) {
 659                 err = -ENOMEM;
 660                 goto err_out;
 661         }
 662
 663         create_qp_params.uarn = ucontext->uarn;
 664         create_qp_params.pd = to_epd(ibpd)->pdn;
 665
 666         if (init_attr->qp_type == IB_QPT_UD) {
 667                 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
 668         } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
 669                 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
 670         } else {
 671                 ibdev_dbg(&dev->ibdev,
 672                           "Unsupported qp type %d driver qp type %d\n",
 673                           init_attr->qp_type, cmd.driver_qp_type);
 674                 err = -EOPNOTSUPP;
 675                 goto err_free_qp;
 676         }
 677
 678         ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
 679                   init_attr->qp_type, cmd.driver_qp_type);
 680         create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
 681         create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
 682         create_qp_params.sq_depth = init_attr->cap.max_send_wr;
 683         create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
 684
 685         create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
 686         create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
 687         qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
 688         if (qp->rq_size) {
 689                 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
 690                                                     qp->rq_size, DMA_TO_DEVICE);
 691                 if (!qp->rq_cpu_addr) {
 692                         err = -ENOMEM;
 693                         goto err_free_qp;
 694                 }
 695
 696                 ibdev_dbg(&dev->ibdev,
 697                           "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
 698                           qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
 699                 create_qp_params.rq_base_addr = qp->rq_dma_addr;
 700         }
 701
 702         err = efa_com_create_qp(&dev->edev, &create_qp_params,
 703                                 &create_qp_resp);
 704         if (err)
 705                 goto err_free_mapped;
 706
 707         resp.sq_db_offset = create_qp_resp.sq_db_offset;
 708         resp.rq_db_offset = create_qp_resp.rq_db_offset;
 709         resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
 710         resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
 711         resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
 712
 713         err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
 714                                     &resp);
 715         if (err)
 716                 goto err_destroy_qp;
 717
 718         qp->qp_handle = create_qp_resp.qp_handle;
 719         qp->ibqp.qp_num = create_qp_resp.qp_num;
 720         qp->ibqp.qp_type = init_attr->qp_type;
 721         qp->max_send_wr = init_attr->cap.max_send_wr;
 722         qp->max_recv_wr = init_attr->cap.max_recv_wr;
 723         qp->max_send_sge = init_attr->cap.max_send_sge;
 724         qp->max_recv_sge = init_attr->cap.max_recv_sge;
 725         qp->max_inline_data = init_attr->cap.max_inline_data;
 726
 727         if (udata->outlen) {
 728                 err = ib_copy_to_udata(udata, &resp,
 729                                        min(sizeof(resp), udata->outlen));
 730                 if (err) {
 731                         ibdev_dbg(&dev->ibdev,
 732                                   "Failed to copy udata for qp[%u]\n",
 733                                   create_qp_resp.qp_num);
 734                         goto err_remove_mmap_entries;
 735                 }
 736         }
 737
 738         ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
 739
 740         return &qp->ibqp;
 741
 742 err_remove_mmap_entries:
 743         efa_qp_user_mmap_entries_remove(qp);
 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                 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
 749                                 qp->rq_size, DMA_TO_DEVICE);
 750 err_free_qp:
 751         kfree(qp);
 752 err_out:
 753         atomic64_inc(&dev->stats.create_qp_err);
 754         return ERR_PTR(err);
 755 }
 756
 757 static const struct {
 758         int                     valid;
 759         enum ib_qp_attr_mask    req_param;
 760         enum ib_qp_attr_mask    opt_param;
 761 } srd_qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
 762         [IB_QPS_RESET] = {
 763                 [IB_QPS_RESET] = { .valid = 1 },
 764                 [IB_QPS_INIT]  = {
 765                         .valid = 1,
 766                         .req_param = IB_QP_PKEY_INDEX |
 767                                      IB_QP_PORT |
 768                                      IB_QP_QKEY,
 769                 },
 770         },
 771         [IB_QPS_INIT] = {
 772                 [IB_QPS_RESET] = { .valid = 1 },
 773                 [IB_QPS_ERR]   = { .valid = 1 },
 774                 [IB_QPS_INIT]  = {
 775                         .valid = 1,
 776                         .opt_param = IB_QP_PKEY_INDEX |
 777                                      IB_QP_PORT |
 778                                      IB_QP_QKEY,
 779                 },
 780                 [IB_QPS_RTR]   = {
 781                         .valid = 1,
 782                         .opt_param = IB_QP_PKEY_INDEX |
 783                                      IB_QP_QKEY,
 784                 },
 785         },
 786         [IB_QPS_RTR] = {
 787                 [IB_QPS_RESET] = { .valid = 1 },
 788                 [IB_QPS_ERR]   = { .valid = 1 },
 789                 [IB_QPS_RTS]   = {
 790                         .valid = 1,
 791                         .req_param = IB_QP_SQ_PSN,
 792                         .opt_param = IB_QP_CUR_STATE |
 793                                      IB_QP_QKEY |
 794                                      IB_QP_RNR_RETRY,
 795
 796                 }
 797         },
 798         [IB_QPS_RTS] = {
 799                 [IB_QPS_RESET] = { .valid = 1 },
 800                 [IB_QPS_ERR]   = { .valid = 1 },
 801                 [IB_QPS_RTS]   = {
 802                         .valid = 1,
 803                         .opt_param = IB_QP_CUR_STATE |
 804                                      IB_QP_QKEY,
 805                 },
 806                 [IB_QPS_SQD] = {
 807                         .valid = 1,
 808                         .opt_param = IB_QP_EN_SQD_ASYNC_NOTIFY,
 809                 },
 810         },
 811         [IB_QPS_SQD] = {
 812                 [IB_QPS_RESET] = { .valid = 1 },
 813                 [IB_QPS_ERR]   = { .valid = 1 },
 814                 [IB_QPS_RTS]   = {
 815                         .valid = 1,
 816                         .opt_param = IB_QP_CUR_STATE |
 817                                      IB_QP_QKEY,
 818                 },
 819                 [IB_QPS_SQD] = {
 820                         .valid = 1,
 821                         .opt_param = IB_QP_PKEY_INDEX |
 822                                      IB_QP_QKEY,
 823                 }
 824         },
 825         [IB_QPS_SQE] = {
 826                 [IB_QPS_RESET] = { .valid = 1 },
 827                 [IB_QPS_ERR]   = { .valid = 1 },
 828                 [IB_QPS_RTS]   = {
 829                         .valid = 1,
 830                         .opt_param = IB_QP_CUR_STATE |
 831                                      IB_QP_QKEY,
 832                 }
 833         },
 834         [IB_QPS_ERR] = {
 835                 [IB_QPS_RESET] = { .valid = 1 },
 836                 [IB_QPS_ERR]   = { .valid = 1 },
 837         }
 838 };
 839
 840 static bool efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state,
 841                                     enum ib_qp_state next_state,
 842                                     enum ib_qp_attr_mask mask)
 843 {
 844         enum ib_qp_attr_mask req_param, opt_param;
 845
 846         if (mask & IB_QP_CUR_STATE  &&
 847             cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
 848             cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
 849                 return false;
 850
 851         if (!srd_qp_state_table[cur_state][next_state].valid)
 852                 return false;
 853
 854         req_param = srd_qp_state_table[cur_state][next_state].req_param;
 855         opt_param = srd_qp_state_table[cur_state][next_state].opt_param;
 856
 857         if ((mask & req_param) != req_param)
 858                 return false;
 859
 860         if (mask & ~(req_param | opt_param | IB_QP_STATE))
 861                 return false;
 862
 863         return true;
 864 }
 865
 866 static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
 867                                   struct ib_qp_attr *qp_attr, int qp_attr_mask,
 868                                   enum ib_qp_state cur_state,
 869                                   enum ib_qp_state new_state)
 870 {
 871         int err;
 872
 873 #define EFA_MODIFY_QP_SUPP_MASK \
 874         (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
 875          IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN | \
 876          IB_QP_RNR_RETRY)
 877
 878         if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
 879                 ibdev_dbg(&dev->ibdev,
 880                           "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
 881                           qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
 882                 return -EOPNOTSUPP;
 883         }
 884
 885         if (qp->ibqp.qp_type == IB_QPT_DRIVER)
 886                 err = !efa_modify_srd_qp_is_ok(cur_state, new_state,
 887                                                qp_attr_mask);
 888         else
 889                 err = !ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
 890                                           qp_attr_mask);
 891
 892         if (err) {
 893                 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
 894                 return -EINVAL;
 895         }
 896
 897         if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
 898                 ibdev_dbg(&dev->ibdev, "Can't change port num\n");
 899                 return -EOPNOTSUPP;
 900         }
 901
 902         if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
 903                 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
 904                 return -EOPNOTSUPP;
 905         }
 906
 907         return 0;
 908 }
 909
 910 int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 911                   int qp_attr_mask, struct ib_udata *udata)
 912 {
 913         struct efa_dev *dev = to_edev(ibqp->device);
 914         struct efa_com_modify_qp_params params = {};
 915         struct efa_qp *qp = to_eqp(ibqp);
 916         enum ib_qp_state cur_state;
 917         enum ib_qp_state new_state;
 918         int err;
 919
 920         if (udata->inlen &&
 921             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
 922                 ibdev_dbg(&dev->ibdev,
 923                           "Incompatible ABI params, udata not cleared\n");
 924                 return -EINVAL;
 925         }
 926
 927         cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
 928                                                      qp->state;
 929         new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
 930
 931         err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
 932                                      new_state);
 933         if (err)
 934                 return err;
 935
 936         params.qp_handle = qp->qp_handle;
 937
 938         if (qp_attr_mask & IB_QP_STATE) {
 939                 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QP_STATE,
 940                         1);
 941                 EFA_SET(&params.modify_mask,
 942                         EFA_ADMIN_MODIFY_QP_CMD_CUR_QP_STATE, 1);
 943                 params.cur_qp_state = cur_state;
 944                 params.qp_state = new_state;
 945         }
 946
 947         if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
 948                 EFA_SET(&params.modify_mask,
 949                         EFA_ADMIN_MODIFY_QP_CMD_SQ_DRAINED_ASYNC_NOTIFY, 1);
 950                 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
 951         }
 952
 953         if (qp_attr_mask & IB_QP_QKEY) {
 954                 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QKEY, 1);
 955                 params.qkey = qp_attr->qkey;
 956         }
 957
 958         if (qp_attr_mask & IB_QP_SQ_PSN) {
 959                 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_SQ_PSN, 1);
 960                 params.sq_psn = qp_attr->sq_psn;
 961         }
 962
 963         if (qp_attr_mask & IB_QP_RNR_RETRY) {
 964                 EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY,
 965                         1);
 966                 params.rnr_retry = qp_attr->rnr_retry;
 967         }
 968
 969         err = efa_com_modify_qp(&dev->edev, &params);
 970         if (err)
 971                 return err;
 972
 973         qp->state = new_state;
 974
 975         return 0;
 976 }
 977
 978 static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
 979 {
 980         struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
 981
 982         return efa_com_destroy_cq(&dev->edev, &params);
 983 }
 984
 985 int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 986 {
 987         struct efa_dev *dev = to_edev(ibcq->device);
 988         struct efa_cq *cq = to_ecq(ibcq);
 989
 990         ibdev_dbg(&dev->ibdev,
 991                   "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
 992                   cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
 993
 994         rdma_user_mmap_entry_remove(cq->mmap_entry);
 995         efa_destroy_cq_idx(dev, cq->cq_idx);
 996         efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
 997                         DMA_FROM_DEVICE);
 998         return 0;
 999 }
1000
1001 static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
1002                                  struct efa_ibv_create_cq_resp *resp)
1003 {
1004         resp->q_mmap_size = cq->size;
1005         cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
1006                                                     virt_to_phys(cq->cpu_addr),
1007                                                     cq->size, EFA_MMAP_DMA_PAGE,
1008                                                     &resp->q_mmap_key);
1009         if (!cq->mmap_entry)
1010                 return -ENOMEM;
1011
1012         return 0;
1013 }
1014
1015 int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
1016                   struct ib_udata *udata)
1017 {
1018         struct efa_ucontext *ucontext = rdma_udata_to_drv_context(
1019                 udata, struct efa_ucontext, ibucontext);
1020         struct efa_ibv_create_cq_resp resp = {};
1021         struct efa_com_create_cq_params params;
1022         struct efa_com_create_cq_result result;
1023         struct ib_device *ibdev = ibcq->device;
1024         struct efa_dev *dev = to_edev(ibdev);
1025         struct efa_ibv_create_cq cmd = {};
1026         struct efa_cq *cq = to_ecq(ibcq);
1027         int entries = attr->cqe;
1028         int err;
1029
1030         ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
1031
1032         if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
1033                 ibdev_dbg(ibdev,
1034                           "cq: requested entries[%u] non-positive or greater than max[%u]\n",
1035                           entries, dev->dev_attr.max_cq_depth);
1036                 err = -EINVAL;
1037                 goto err_out;
1038         }
1039
1040         if (offsetofend(typeof(cmd), num_sub_cqs) > udata->inlen) {
1041                 ibdev_dbg(ibdev,
1042                           "Incompatible ABI params, no input udata\n");
1043                 err = -EINVAL;
1044                 goto err_out;
1045         }
1046
1047         if (udata->inlen > sizeof(cmd) &&
1048             !ib_is_udata_cleared(udata, sizeof(cmd),
1049                                  udata->inlen - sizeof(cmd))) {
1050                 ibdev_dbg(ibdev,
1051                           "Incompatible ABI params, unknown fields in udata\n");
1052                 err = -EINVAL;
1053                 goto err_out;
1054         }
1055
1056         err = ib_copy_from_udata(&cmd, udata,
1057                                  min(sizeof(cmd), udata->inlen));
1058         if (err) {
1059                 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
1060                 goto err_out;
1061         }
1062
1063         if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_50)) {
1064                 ibdev_dbg(ibdev,
1065                           "Incompatible ABI params, unknown fields in udata\n");
1066                 err = -EINVAL;
1067                 goto err_out;
1068         }
1069
1070         if (!cmd.cq_entry_size) {
1071                 ibdev_dbg(ibdev,
1072                           "Invalid entry size [%u]\n", cmd.cq_entry_size);
1073                 err = -EINVAL;
1074                 goto err_out;
1075         }
1076
1077         if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
1078                 ibdev_dbg(ibdev,
1079                           "Invalid number of sub cqs[%u] expected[%u]\n",
1080                           cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
1081                 err = -EINVAL;
1082                 goto err_out;
1083         }
1084
1085         cq->ucontext = ucontext;
1086         cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
1087         cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
1088                                          DMA_FROM_DEVICE);
1089         if (!cq->cpu_addr) {
1090                 err = -ENOMEM;
1091                 goto err_out;
1092         }
1093
1094         params.uarn = cq->ucontext->uarn;
1095         params.cq_depth = entries;
1096         params.dma_addr = cq->dma_addr;
1097         params.entry_size_in_bytes = cmd.cq_entry_size;
1098         params.num_sub_cqs = cmd.num_sub_cqs;
1099         err = efa_com_create_cq(&dev->edev, &params, &result);
1100         if (err)
1101                 goto err_free_mapped;
1102
1103         resp.cq_idx = result.cq_idx;
1104         cq->cq_idx = result.cq_idx;
1105         cq->ibcq.cqe = result.actual_depth;
1106         WARN_ON_ONCE(entries != result.actual_depth);
1107
1108         err = cq_mmap_entries_setup(dev, cq, &resp);
1109         if (err) {
1110                 ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n",
1111                           cq->cq_idx);
1112                 goto err_destroy_cq;
1113         }
1114
1115         if (udata->outlen) {
1116                 err = ib_copy_to_udata(udata, &resp,
1117                                        min(sizeof(resp), udata->outlen));
1118                 if (err) {
1119                         ibdev_dbg(ibdev,
1120                                   "Failed to copy udata for create_cq\n");
1121                         goto err_remove_mmap;
1122                 }
1123         }
1124
1125         ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
1126                   cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
1127
1128         return 0;
1129
1130 err_remove_mmap:
1131         rdma_user_mmap_entry_remove(cq->mmap_entry);
1132 err_destroy_cq:
1133         efa_destroy_cq_idx(dev, cq->cq_idx);
1134 err_free_mapped:
1135         efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
1136                         DMA_FROM_DEVICE);
1137
1138 err_out:
1139         atomic64_inc(&dev->stats.create_cq_err);
1140         return err;
1141 }
1142
1143 static int umem_to_page_list(struct efa_dev *dev,
1144                              struct ib_umem *umem,
1145                              u64 *page_list,
1146                              u32 hp_cnt,
1147                              u8 hp_shift)
1148 {
1149         u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
1150         struct ib_block_iter biter;
1151         unsigned int hp_idx = 0;
1152
1153         ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
1154                   hp_cnt, pages_in_hp);
1155
1156         rdma_umem_for_each_dma_block(umem, &biter, BIT(hp_shift))
1157                 page_list[hp_idx++] = rdma_block_iter_dma_address(&biter);
1158
1159         return 0;
1160 }
1161
1162 static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
1163 {
1164         struct scatterlist *sglist;
1165         struct page *pg;
1166         int i;
1167
1168         sglist = kmalloc_array(page_cnt, sizeof(*sglist), GFP_KERNEL);
1169         if (!sglist)
1170                 return NULL;
1171         sg_init_table(sglist, page_cnt);
1172         for (i = 0; i < page_cnt; i++) {
1173                 pg = vmalloc_to_page(buf);
1174                 if (!pg)
1175                         goto err;
1176                 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
1177                 buf += PAGE_SIZE / sizeof(*buf);
1178         }
1179         return sglist;
1180
1181 err:
1182         kfree(sglist);
1183         return NULL;
1184 }
1185
1186 /*
1187  * create a chunk list of physical pages dma addresses from the supplied
1188  * scatter gather list
1189  */
1190 static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
1191 {
1192         struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1193         int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
1194         struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
1195         unsigned int chunk_list_size, chunk_idx, payload_idx;
1196         int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
1197         struct efa_com_ctrl_buff_info *ctrl_buf;
1198         u64 *cur_chunk_buf, *prev_chunk_buf;
1199         struct ib_block_iter biter;
1200         dma_addr_t dma_addr;
1201         int i;
1202
1203         /* allocate a chunk list that consists of 4KB chunks */
1204         chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
1205
1206         chunk_list->size = chunk_list_size;
1207         chunk_list->chunks = kcalloc(chunk_list_size,
1208                                      sizeof(*chunk_list->chunks),
1209                                      GFP_KERNEL);
1210         if (!chunk_list->chunks)
1211                 return -ENOMEM;
1212
1213         ibdev_dbg(&dev->ibdev,
1214                   "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
1215                   page_cnt);
1216
1217         /* allocate chunk buffers: */
1218         for (i = 0; i < chunk_list_size; i++) {
1219                 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
1220                 if (!chunk_list->chunks[i].buf)
1221                         goto chunk_list_dealloc;
1222
1223                 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
1224         }
1225         chunk_list->chunks[chunk_list_size - 1].length =
1226                 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
1227                         EFA_CHUNK_PTR_SIZE;
1228
1229         /* fill the dma addresses of sg list pages to chunks: */
1230         chunk_idx = 0;
1231         payload_idx = 0;
1232         cur_chunk_buf = chunk_list->chunks[0].buf;
1233         rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt,
1234                             EFA_CHUNK_PAYLOAD_SIZE) {
1235                 cur_chunk_buf[payload_idx++] =
1236                         rdma_block_iter_dma_address(&biter);
1237
1238                 if (payload_idx == EFA_PTRS_PER_CHUNK) {
1239                         chunk_idx++;
1240                         cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
1241                         payload_idx = 0;
1242                 }
1243         }
1244
1245         /* map chunks to dma and fill chunks next ptrs */
1246         for (i = chunk_list_size - 1; i >= 0; i--) {
1247                 dma_addr = dma_map_single(&dev->pdev->dev,
1248                                           chunk_list->chunks[i].buf,
1249                                           chunk_list->chunks[i].length,
1250                                           DMA_TO_DEVICE);
1251                 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1252                         ibdev_err(&dev->ibdev,
1253                                   "chunk[%u] dma_map_failed\n", i);
1254                         goto chunk_list_unmap;
1255                 }
1256
1257                 chunk_list->chunks[i].dma_addr = dma_addr;
1258                 ibdev_dbg(&dev->ibdev,
1259                           "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
1260
1261                 if (!i)
1262                         break;
1263
1264                 prev_chunk_buf = chunk_list->chunks[i - 1].buf;
1265
1266                 ctrl_buf = (struct efa_com_ctrl_buff_info *)
1267                                 &prev_chunk_buf[EFA_PTRS_PER_CHUNK];
1268                 ctrl_buf->length = chunk_list->chunks[i].length;
1269
1270                 efa_com_set_dma_addr(dma_addr,
1271                                      &ctrl_buf->address.mem_addr_high,
1272                                      &ctrl_buf->address.mem_addr_low);
1273         }
1274
1275         return 0;
1276
1277 chunk_list_unmap:
1278         for (; i < chunk_list_size; i++) {
1279                 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1280                                  chunk_list->chunks[i].length, DMA_TO_DEVICE);
1281         }
1282 chunk_list_dealloc:
1283         for (i = 0; i < chunk_list_size; i++)
1284                 kfree(chunk_list->chunks[i].buf);
1285
1286         kfree(chunk_list->chunks);
1287         return -ENOMEM;
1288 }
1289
1290 static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1291 {
1292         struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1293         int i;
1294
1295         for (i = 0; i < chunk_list->size; i++) {
1296                 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1297                                  chunk_list->chunks[i].length, DMA_TO_DEVICE);
1298                 kfree(chunk_list->chunks[i].buf);
1299         }
1300
1301         kfree(chunk_list->chunks);
1302 }
1303
1304 /* initialize pbl continuous mode: map pbl buffer to a dma address. */
1305 static int pbl_continuous_initialize(struct efa_dev *dev,
1306                                      struct pbl_context *pbl)
1307 {
1308         dma_addr_t dma_addr;
1309
1310         dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
1311                                   pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1312         if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1313                 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
1314                 return -ENOMEM;
1315         }
1316
1317         pbl->phys.continuous.dma_addr = dma_addr;
1318         ibdev_dbg(&dev->ibdev,
1319                   "pbl continuous - dma_addr = %pad, size[%u]\n",
1320                   &dma_addr, pbl->pbl_buf_size_in_bytes);
1321
1322         return 0;
1323 }
1324
1325 /*
1326  * initialize pbl indirect mode:
1327  * create a chunk list out of the dma addresses of the physical pages of
1328  * pbl buffer.
1329  */
1330 static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
1331 {
1332         u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, PAGE_SIZE);
1333         struct scatterlist *sgl;
1334         int sg_dma_cnt, err;
1335
1336         BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
1337         sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
1338         if (!sgl)
1339                 return -ENOMEM;
1340
1341         sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1342         if (!sg_dma_cnt) {
1343                 err = -EINVAL;
1344                 goto err_map;
1345         }
1346
1347         pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
1348         pbl->phys.indirect.sgl = sgl;
1349         pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
1350         err = pbl_chunk_list_create(dev, pbl);
1351         if (err) {
1352                 ibdev_dbg(&dev->ibdev,
1353                           "chunk_list creation failed[%d]\n", err);
1354                 goto err_chunk;
1355         }
1356
1357         ibdev_dbg(&dev->ibdev,
1358                   "pbl indirect - size[%u], chunks[%u]\n",
1359                   pbl->pbl_buf_size_in_bytes,
1360                   pbl->phys.indirect.chunk_list.size);
1361
1362         return 0;
1363
1364 err_chunk:
1365         dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1366 err_map:
1367         kfree(sgl);
1368         return err;
1369 }
1370
1371 static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
1372 {
1373         pbl_chunk_list_destroy(dev, pbl);
1374         dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
1375                      pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
1376         kfree(pbl->phys.indirect.sgl);
1377 }
1378
1379 /* create a page buffer list from a mapped user memory region */
1380 static int pbl_create(struct efa_dev *dev,
1381                       struct pbl_context *pbl,
1382                       struct ib_umem *umem,
1383                       int hp_cnt,
1384                       u8 hp_shift)
1385 {
1386         int err;
1387
1388         pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
1389         pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL);
1390         if (!pbl->pbl_buf)
1391                 return -ENOMEM;
1392
1393         if (is_vmalloc_addr(pbl->pbl_buf)) {
1394                 pbl->physically_continuous = 0;
1395                 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1396                                         hp_shift);
1397                 if (err)
1398                         goto err_free;
1399
1400                 err = pbl_indirect_initialize(dev, pbl);
1401                 if (err)
1402                         goto err_free;
1403         } else {
1404                 pbl->physically_continuous = 1;
1405                 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1406                                         hp_shift);
1407                 if (err)
1408                         goto err_free;
1409
1410                 err = pbl_continuous_initialize(dev, pbl);
1411                 if (err)
1412                         goto err_free;
1413         }
1414
1415         ibdev_dbg(&dev->ibdev,
1416                   "user_pbl_created: user_pages[%u], continuous[%u]\n",
1417                   hp_cnt, pbl->physically_continuous);
1418
1419         return 0;
1420
1421 err_free:
1422         kvfree(pbl->pbl_buf);
1423         return err;
1424 }
1425
1426 static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1427 {
1428         if (pbl->physically_continuous)
1429                 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
1430                                  pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1431         else
1432                 pbl_indirect_terminate(dev, pbl);
1433
1434         kvfree(pbl->pbl_buf);
1435 }
1436
1437 static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
1438                                  struct efa_com_reg_mr_params *params)
1439 {
1440         int err;
1441
1442         params->inline_pbl = 1;
1443         err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
1444                                 params->page_num, params->page_shift);
1445         if (err)
1446                 return err;
1447
1448         ibdev_dbg(&dev->ibdev,
1449                   "inline_pbl_array - pages[%u]\n", params->page_num);
1450
1451         return 0;
1452 }
1453
1454 static int efa_create_pbl(struct efa_dev *dev,
1455                           struct pbl_context *pbl,
1456                           struct efa_mr *mr,
1457                           struct efa_com_reg_mr_params *params)
1458 {
1459         int err;
1460
1461         err = pbl_create(dev, pbl, mr->umem, params->page_num,
1462                          params->page_shift);
1463         if (err) {
1464                 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
1465                 return err;
1466         }
1467
1468         params->inline_pbl = 0;
1469         params->indirect = !pbl->physically_continuous;
1470         if (pbl->physically_continuous) {
1471                 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
1472
1473                 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
1474                                      &params->pbl.pbl.address.mem_addr_high,
1475                                      &params->pbl.pbl.address.mem_addr_low);
1476         } else {
1477                 params->pbl.pbl.length =
1478                         pbl->phys.indirect.chunk_list.chunks[0].length;
1479
1480                 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
1481                                      &params->pbl.pbl.address.mem_addr_high,
1482                                      &params->pbl.pbl.address.mem_addr_low);
1483         }
1484
1485         return 0;
1486 }
1487
1488 struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
1489                          u64 virt_addr, int access_flags,
1490                          struct ib_udata *udata)
1491 {
1492         struct efa_dev *dev = to_edev(ibpd->device);
1493         struct efa_com_reg_mr_params params = {};
1494         struct efa_com_reg_mr_result result = {};
1495         struct pbl_context pbl;
1496         int supp_access_flags;
1497         unsigned int pg_sz;
1498         struct efa_mr *mr;
1499         int inline_size;
1500         int err;
1501
1502         if (udata && udata->inlen &&
1503             !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
1504                 ibdev_dbg(&dev->ibdev,
1505                           "Incompatible ABI params, udata not cleared\n");
1506                 err = -EINVAL;
1507                 goto err_out;
1508         }
1509
1510         supp_access_flags =
1511                 IB_ACCESS_LOCAL_WRITE |
1512                 (EFA_DEV_CAP(dev, RDMA_READ) ? IB_ACCESS_REMOTE_READ : 0);
1513
1514         access_flags &= ~IB_ACCESS_OPTIONAL;
1515         if (access_flags & ~supp_access_flags) {
1516                 ibdev_dbg(&dev->ibdev,
1517                           "Unsupported access flags[%#x], supported[%#x]\n",
1518                           access_flags, supp_access_flags);
1519                 err = -EOPNOTSUPP;
1520                 goto err_out;
1521         }
1522
1523         mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1524         if (!mr) {
1525                 err = -ENOMEM;
1526                 goto err_out;
1527         }
1528
1529         mr->umem = ib_umem_get(ibpd->device, start, length, access_flags);
1530         if (IS_ERR(mr->umem)) {
1531                 err = PTR_ERR(mr->umem);
1532                 ibdev_dbg(&dev->ibdev,
1533                           "Failed to pin and map user space memory[%d]\n", err);
1534                 goto err_free;
1535         }
1536
1537         params.pd = to_epd(ibpd)->pdn;
1538         params.iova = virt_addr;
1539         params.mr_length_in_bytes = length;
1540         params.permissions = access_flags;
1541
1542         pg_sz = ib_umem_find_best_pgsz(mr->umem,
1543                                        dev->dev_attr.page_size_cap,
1544                                        virt_addr);
1545         if (!pg_sz) {
1546                 err = -EOPNOTSUPP;
1547                 ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n",
1548                           dev->dev_attr.page_size_cap);
1549                 goto err_unmap;
1550         }
1551
1552         params.page_shift = order_base_2(pg_sz);
1553         params.page_num = ib_umem_num_dma_blocks(mr->umem, pg_sz);
1554
1555         ibdev_dbg(&dev->ibdev,
1556                   "start %#llx length %#llx params.page_shift %u params.page_num %u\n",
1557                   start, length, params.page_shift, params.page_num);
1558
1559         inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
1560         if (params.page_num <= inline_size) {
1561                 err = efa_create_inline_pbl(dev, mr, &params);
1562                 if (err)
1563                         goto err_unmap;
1564
1565                 err = efa_com_register_mr(&dev->edev, &params, &result);
1566                 if (err)
1567                         goto err_unmap;
1568         } else {
1569                 err = efa_create_pbl(dev, &pbl, mr, &params);
1570                 if (err)
1571                         goto err_unmap;
1572
1573                 err = efa_com_register_mr(&dev->edev, &params, &result);
1574                 pbl_destroy(dev, &pbl);
1575
1576                 if (err)
1577                         goto err_unmap;
1578         }
1579
1580         mr->ibmr.lkey = result.l_key;
1581         mr->ibmr.rkey = result.r_key;
1582         mr->ibmr.length = length;
1583         ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
1584
1585         return &mr->ibmr;
1586
1587 err_unmap:
1588         ib_umem_release(mr->umem);
1589 err_free:
1590         kfree(mr);
1591 err_out:
1592         atomic64_inc(&dev->stats.reg_mr_err);
1593         return ERR_PTR(err);
1594 }
1595
1596 int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
1597 {
1598         struct efa_dev *dev = to_edev(ibmr->device);
1599         struct efa_com_dereg_mr_params params;
1600         struct efa_mr *mr = to_emr(ibmr);
1601         int err;
1602
1603         ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
1604
1605         params.l_key = mr->ibmr.lkey;
1606         err = efa_com_dereg_mr(&dev->edev, &params);
1607         if (err)
1608                 return err;
1609
1610         ib_umem_release(mr->umem);
1611         kfree(mr);
1612
1613         return 0;
1614 }
1615
1616 int efa_get_port_immutable(struct ib_device *ibdev, u8 port_num,
1617                            struct ib_port_immutable *immutable)
1618 {
1619         struct ib_port_attr attr;
1620         int err;
1621
1622         err = ib_query_port(ibdev, port_num, &attr);
1623         if (err) {
1624                 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
1625                 return err;
1626         }
1627
1628         immutable->pkey_tbl_len = attr.pkey_tbl_len;
1629         immutable->gid_tbl_len = attr.gid_tbl_len;
1630
1631         return 0;
1632 }
1633
1634 static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
1635 {
1636         struct efa_com_dealloc_uar_params params = {
1637                 .uarn = uarn,
1638         };
1639
1640         return efa_com_dealloc_uar(&dev->edev, &params);
1641 }
1642
1643 #define EFA_CHECK_USER_COMP(_dev, _comp_mask, _attr, _mask, _attr_str) \
1644         (_attr_str = (!(_dev)->dev_attr._attr || ((_comp_mask) & (_mask))) ? \
1645                      NULL : #_attr)
1646
1647 static int efa_user_comp_handshake(const struct ib_ucontext *ibucontext,
1648                                    const struct efa_ibv_alloc_ucontext_cmd *cmd)
1649 {
1650         struct efa_dev *dev = to_edev(ibucontext->device);
1651         char *attr_str;
1652
1653         if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, max_tx_batch,
1654                                 EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH, attr_str))
1655                 goto err;
1656
1657         if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, min_sq_depth,
1658                                 EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR,
1659                                 attr_str))
1660                 goto err;
1661
1662         return 0;
1663
1664 err:
1665         ibdev_dbg(&dev->ibdev, "Userspace handshake failed for %s attribute\n",
1666                   attr_str);
1667         return -EOPNOTSUPP;
1668 }
1669
1670 int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
1671 {
1672         struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1673         struct efa_dev *dev = to_edev(ibucontext->device);
1674         struct efa_ibv_alloc_ucontext_resp resp = {};
1675         struct efa_ibv_alloc_ucontext_cmd cmd = {};
1676         struct efa_com_alloc_uar_result result;
1677         int err;
1678
1679         /*
1680          * it's fine if the driver does not know all request fields,
1681          * we will ack input fields in our response.
1682          */
1683
1684         err = ib_copy_from_udata(&cmd, udata,
1685                                  min(sizeof(cmd), udata->inlen));
1686         if (err) {
1687                 ibdev_dbg(&dev->ibdev,
1688                           "Cannot copy udata for alloc_ucontext\n");
1689                 goto err_out;
1690         }
1691
1692         err = efa_user_comp_handshake(ibucontext, &cmd);
1693         if (err)
1694                 goto err_out;
1695
1696         err = efa_com_alloc_uar(&dev->edev, &result);
1697         if (err)
1698                 goto err_out;
1699
1700         ucontext->uarn = result.uarn;
1701
1702         resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
1703         resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
1704         resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
1705         resp.inline_buf_size = dev->dev_attr.inline_buf_size;
1706         resp.max_llq_size = dev->dev_attr.max_llq_size;
1707         resp.max_tx_batch = dev->dev_attr.max_tx_batch;
1708         resp.min_sq_wr = dev->dev_attr.min_sq_depth;
1709
1710         err = ib_copy_to_udata(udata, &resp,
1711                                min(sizeof(resp), udata->outlen));
1712         if (err)
1713                 goto err_dealloc_uar;
1714
1715         return 0;
1716
1717 err_dealloc_uar:
1718         efa_dealloc_uar(dev, result.uarn);
1719 err_out:
1720         atomic64_inc(&dev->stats.alloc_ucontext_err);
1721         return err;
1722 }
1723
1724 void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
1725 {
1726         struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1727         struct efa_dev *dev = to_edev(ibucontext->device);
1728
1729         efa_dealloc_uar(dev, ucontext->uarn);
1730 }
1731
1732 void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
1733 {
1734         struct efa_user_mmap_entry *entry = to_emmap(rdma_entry);
1735
1736         kfree(entry);
1737 }
1738
1739 static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
1740                       struct vm_area_struct *vma)
1741 {
1742         struct rdma_user_mmap_entry *rdma_entry;
1743         struct efa_user_mmap_entry *entry;
1744         unsigned long va;
1745         int err = 0;
1746         u64 pfn;
1747
1748         rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma);
1749         if (!rdma_entry) {
1750                 ibdev_dbg(&dev->ibdev,
1751                           "pgoff[%#lx] does not have valid entry\n",
1752                           vma->vm_pgoff);
1753                 atomic64_inc(&dev->stats.mmap_err);
1754                 return -EINVAL;
1755         }
1756         entry = to_emmap(rdma_entry);
1757
1758         ibdev_dbg(&dev->ibdev,
1759                   "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n",
1760                   entry->address, rdma_entry->npages * PAGE_SIZE,
1761                   entry->mmap_flag);
1762
1763         pfn = entry->address >> PAGE_SHIFT;
1764         switch (entry->mmap_flag) {
1765         case EFA_MMAP_IO_NC:
1766                 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
1767                                         entry->rdma_entry.npages * PAGE_SIZE,
1768                                         pgprot_noncached(vma->vm_page_prot),
1769                                         rdma_entry);
1770                 break;
1771         case EFA_MMAP_IO_WC:
1772                 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
1773                                         entry->rdma_entry.npages * PAGE_SIZE,
1774                                         pgprot_writecombine(vma->vm_page_prot),
1775                                         rdma_entry);
1776                 break;
1777         case EFA_MMAP_DMA_PAGE:
1778                 for (va = vma->vm_start; va < vma->vm_end;
1779                      va += PAGE_SIZE, pfn++) {
1780                         err = vm_insert_page(vma, va, pfn_to_page(pfn));
1781                         if (err)
1782                                 break;
1783                 }
1784                 break;
1785         default:
1786                 err = -EINVAL;
1787         }
1788
1789         if (err) {
1790                 ibdev_dbg(
1791                         &dev->ibdev,
1792                         "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n",
1793                         entry->address, rdma_entry->npages * PAGE_SIZE,
1794                         entry->mmap_flag, err);
1795                 atomic64_inc(&dev->stats.mmap_err);
1796         }
1797
1798         rdma_user_mmap_entry_put(rdma_entry);
1799         return err;
1800 }
1801
1802 int efa_mmap(struct ib_ucontext *ibucontext,
1803              struct vm_area_struct *vma)
1804 {
1805         struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1806         struct efa_dev *dev = to_edev(ibucontext->device);
1807         size_t length = vma->vm_end - vma->vm_start;
1808
1809         ibdev_dbg(&dev->ibdev,
1810                   "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n",
1811                   vma->vm_start, vma->vm_end, length, vma->vm_pgoff);
1812
1813         return __efa_mmap(dev, ucontext, vma);
1814 }
1815
1816 static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
1817 {
1818         struct efa_com_destroy_ah_params params = {
1819                 .ah = ah->ah,
1820                 .pdn = to_epd(ah->ibah.pd)->pdn,
1821         };
1822
1823         return efa_com_destroy_ah(&dev->edev, &params);
1824 }
1825
1826 int efa_create_ah(struct ib_ah *ibah,
1827                   struct rdma_ah_init_attr *init_attr,
1828                   struct ib_udata *udata)
1829 {
1830         struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
1831         struct efa_dev *dev = to_edev(ibah->device);
1832         struct efa_com_create_ah_params params = {};
1833         struct efa_ibv_create_ah_resp resp = {};
1834         struct efa_com_create_ah_result result;
1835         struct efa_ah *ah = to_eah(ibah);
1836         int err;
1837
1838         if (!(init_attr->flags & RDMA_CREATE_AH_SLEEPABLE)) {
1839                 ibdev_dbg(&dev->ibdev,
1840                           "Create address handle is not supported in atomic context\n");
1841                 err = -EOPNOTSUPP;
1842                 goto err_out;
1843         }
1844
1845         if (udata->inlen &&
1846             !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1847                 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
1848                 err = -EINVAL;
1849                 goto err_out;
1850         }
1851
1852         memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
1853                sizeof(params.dest_addr));
1854         params.pdn = to_epd(ibah->pd)->pdn;
1855         err = efa_com_create_ah(&dev->edev, &params, &result);
1856         if (err)
1857                 goto err_out;
1858
1859         memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
1860         ah->ah = result.ah;
1861
1862         resp.efa_address_handle = result.ah;
1863
1864         if (udata->outlen) {
1865                 err = ib_copy_to_udata(udata, &resp,
1866                                        min(sizeof(resp), udata->outlen));
1867                 if (err) {
1868                         ibdev_dbg(&dev->ibdev,
1869                                   "Failed to copy udata for create_ah response\n");
1870                         goto err_destroy_ah;
1871                 }
1872         }
1873         ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
1874
1875         return 0;
1876
1877 err_destroy_ah:
1878         efa_ah_destroy(dev, ah);
1879 err_out:
1880         atomic64_inc(&dev->stats.create_ah_err);
1881         return err;
1882 }
1883
1884 int efa_destroy_ah(struct ib_ah *ibah, u32 flags)
1885 {
1886         struct efa_dev *dev = to_edev(ibah->pd->device);
1887         struct efa_ah *ah = to_eah(ibah);
1888
1889         ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
1890
1891         if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
1892                 ibdev_dbg(&dev->ibdev,
1893                           "Destroy address handle is not supported in atomic context\n");
1894                 return -EOPNOTSUPP;
1895         }
1896
1897         efa_ah_destroy(dev, ah);
1898         return 0;
1899 }
1900
1901 struct rdma_hw_stats *efa_alloc_hw_stats(struct ib_device *ibdev, u8 port_num)
1902 {
1903         return rdma_alloc_hw_stats_struct(efa_stats_names,
1904                                           ARRAY_SIZE(efa_stats_names),
1905                                           RDMA_HW_STATS_DEFAULT_LIFESPAN);
1906 }
1907
1908 int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
1909                      u8 port_num, int index)
1910 {
1911         struct efa_com_get_stats_params params = {};
1912         union efa_com_get_stats_result result;
1913         struct efa_dev *dev = to_edev(ibdev);
1914         struct efa_com_rdma_read_stats *rrs;
1915         struct efa_com_messages_stats *ms;
1916         struct efa_com_basic_stats *bs;
1917         struct efa_com_stats_admin *as;
1918         struct efa_stats *s;
1919         int err;
1920
1921         params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL;
1922         params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC;
1923
1924         err = efa_com_get_stats(&dev->edev, &params, &result);
1925         if (err)
1926                 return err;
1927
1928         bs = &result.basic_stats;
1929         stats->value[EFA_TX_BYTES] = bs->tx_bytes;
1930         stats->value[EFA_TX_PKTS] = bs->tx_pkts;
1931         stats->value[EFA_RX_BYTES] = bs->rx_bytes;
1932         stats->value[EFA_RX_PKTS] = bs->rx_pkts;
1933         stats->value[EFA_RX_DROPS] = bs->rx_drops;
1934
1935         params.type = EFA_ADMIN_GET_STATS_TYPE_MESSAGES;
1936         err = efa_com_get_stats(&dev->edev, &params, &result);
1937         if (err)
1938                 return err;
1939
1940         ms = &result.messages_stats;
1941         stats->value[EFA_SEND_BYTES] = ms->send_bytes;
1942         stats->value[EFA_SEND_WRS] = ms->send_wrs;
1943         stats->value[EFA_RECV_BYTES] = ms->recv_bytes;
1944         stats->value[EFA_RECV_WRS] = ms->recv_wrs;
1945
1946         params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_READ;
1947         err = efa_com_get_stats(&dev->edev, &params, &result);
1948         if (err)
1949                 return err;
1950
1951         rrs = &result.rdma_read_stats;
1952         stats->value[EFA_RDMA_READ_WRS] = rrs->read_wrs;
1953         stats->value[EFA_RDMA_READ_BYTES] = rrs->read_bytes;
1954         stats->value[EFA_RDMA_READ_WR_ERR] = rrs->read_wr_err;
1955         stats->value[EFA_RDMA_READ_RESP_BYTES] = rrs->read_resp_bytes;
1956
1957         as = &dev->edev.aq.stats;
1958         stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd);
1959         stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd);
1960         stats->value[EFA_CMDS_ERR] = atomic64_read(&as->cmd_err);
1961         stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion);
1962
1963         s = &dev->stats;
1964         stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd);
1965         stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->alloc_pd_err);
1966         stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->create_qp_err);
1967         stats->value[EFA_CREATE_CQ_ERR] = atomic64_read(&s->create_cq_err);
1968         stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->reg_mr_err);
1969         stats->value[EFA_ALLOC_UCONTEXT_ERR] =
1970                 atomic64_read(&s->alloc_ucontext_err);
1971         stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->create_ah_err);
1972         stats->value[EFA_MMAP_ERR] = atomic64_read(&s->mmap_err);
1973
1974         return ARRAY_SIZE(efa_stats_names);
1975 }
1976
1977 enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
1978                                          u8 port_num)
1979 {
1980         return IB_LINK_LAYER_UNSPECIFIED;
1981 }
1982