1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* 3 * Copyright 2018-2023 Amazon.com, Inc. or its affiliates. All rights reserved. 4 */ 5 6 #include <linux/dma-buf.h> 7 #include <linux/dma-resv.h> 8 #include <linux/vmalloc.h> 9 #include <linux/log2.h> 10 11 #include <rdma/ib_addr.h> 12 #include <rdma/ib_umem.h> 13 #include <rdma/ib_user_verbs.h> 14 #include <rdma/ib_verbs.h> 15 #include <rdma/uverbs_ioctl.h> 16 17 #include "efa.h" 18 #include "efa_io_defs.h" 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_user_mmap_entry { 31 struct rdma_user_mmap_entry rdma_entry; 32 u64 address; 33 u8 mmap_flag; 34 }; 35 36 #define EFA_DEFINE_DEVICE_STATS(op) \ 37 op(EFA_SUBMITTED_CMDS, "submitted_cmds") \ 38 op(EFA_COMPLETED_CMDS, "completed_cmds") \ 39 op(EFA_CMDS_ERR, "cmds_err") \ 40 op(EFA_NO_COMPLETION_CMDS, "no_completion_cmds") \ 41 op(EFA_KEEP_ALIVE_RCVD, "keep_alive_rcvd") \ 42 op(EFA_ALLOC_PD_ERR, "alloc_pd_err") \ 43 op(EFA_CREATE_QP_ERR, "create_qp_err") \ 44 op(EFA_CREATE_CQ_ERR, "create_cq_err") \ 45 op(EFA_REG_MR_ERR, "reg_mr_err") \ 46 op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \ 47 op(EFA_CREATE_AH_ERR, "create_ah_err") \ 48 op(EFA_MMAP_ERR, "mmap_err") 49 50 #define EFA_DEFINE_PORT_STATS(op) \ 51 op(EFA_TX_BYTES, "tx_bytes") \ 52 op(EFA_TX_PKTS, "tx_pkts") \ 53 op(EFA_RX_BYTES, "rx_bytes") \ 54 op(EFA_RX_PKTS, "rx_pkts") \ 55 op(EFA_RX_DROPS, "rx_drops") \ 56 op(EFA_SEND_BYTES, "send_bytes") \ 57 op(EFA_SEND_WRS, "send_wrs") \ 58 op(EFA_RECV_BYTES, "recv_bytes") \ 59 op(EFA_RECV_WRS, "recv_wrs") \ 60 op(EFA_RDMA_READ_WRS, "rdma_read_wrs") \ 61 op(EFA_RDMA_READ_BYTES, "rdma_read_bytes") \ 62 op(EFA_RDMA_READ_WR_ERR, "rdma_read_wr_err") \ 63 op(EFA_RDMA_READ_RESP_BYTES, "rdma_read_resp_bytes") \ 64 65 #define EFA_STATS_ENUM(ename, name) ename, 66 #define EFA_STATS_STR(ename, nam) \ 67 [ename].name = nam, 68 69 enum efa_hw_device_stats { 70 EFA_DEFINE_DEVICE_STATS(EFA_STATS_ENUM) 71 }; 72 73 static const struct rdma_stat_desc efa_device_stats_descs[] = { 74 EFA_DEFINE_DEVICE_STATS(EFA_STATS_STR) 75 }; 76 77 enum efa_hw_port_stats { 78 EFA_DEFINE_PORT_STATS(EFA_STATS_ENUM) 79 }; 80 81 static const struct rdma_stat_desc efa_port_stats_descs[] = { 82 EFA_DEFINE_PORT_STATS(EFA_STATS_STR) 83 }; 84 85 #define EFA_CHUNK_PAYLOAD_SHIFT 12 86 #define EFA_CHUNK_PAYLOAD_SIZE BIT(EFA_CHUNK_PAYLOAD_SHIFT) 87 #define EFA_CHUNK_PAYLOAD_PTR_SIZE 8 88 89 #define EFA_CHUNK_SHIFT 12 90 #define EFA_CHUNK_SIZE BIT(EFA_CHUNK_SHIFT) 91 #define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info) 92 93 #define EFA_PTRS_PER_CHUNK \ 94 ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE) 95 96 #define EFA_CHUNK_USED_SIZE \ 97 ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE) 98 99 struct pbl_chunk { 100 dma_addr_t dma_addr; 101 u64 *buf; 102 u32 length; 103 }; 104 105 struct pbl_chunk_list { 106 struct pbl_chunk *chunks; 107 unsigned int size; 108 }; 109 110 struct pbl_context { 111 union { 112 struct { 113 dma_addr_t dma_addr; 114 } continuous; 115 struct { 116 u32 pbl_buf_size_in_pages; 117 struct scatterlist *sgl; 118 int sg_dma_cnt; 119 struct pbl_chunk_list chunk_list; 120 } indirect; 121 } phys; 122 u64 *pbl_buf; 123 u32 pbl_buf_size_in_bytes; 124 u8 physically_continuous; 125 }; 126 127 static inline struct efa_dev *to_edev(struct ib_device *ibdev) 128 { 129 return container_of(ibdev, struct efa_dev, ibdev); 130 } 131 132 static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext) 133 { 134 return container_of(ibucontext, struct efa_ucontext, ibucontext); 135 } 136 137 static inline struct efa_pd *to_epd(struct ib_pd *ibpd) 138 { 139 return container_of(ibpd, struct efa_pd, ibpd); 140 } 141 142 static inline struct efa_mr *to_emr(struct ib_mr *ibmr) 143 { 144 return container_of(ibmr, struct efa_mr, ibmr); 145 } 146 147 static inline struct efa_qp *to_eqp(struct ib_qp *ibqp) 148 { 149 return container_of(ibqp, struct efa_qp, ibqp); 150 } 151 152 static inline struct efa_cq *to_ecq(struct ib_cq *ibcq) 153 { 154 return container_of(ibcq, struct efa_cq, ibcq); 155 } 156 157 static inline struct efa_ah *to_eah(struct ib_ah *ibah) 158 { 159 return container_of(ibah, struct efa_ah, ibah); 160 } 161 162 static inline struct efa_user_mmap_entry * 163 to_emmap(struct rdma_user_mmap_entry *rdma_entry) 164 { 165 return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry); 166 } 167 168 #define EFA_DEV_CAP(dev, cap) \ 169 ((dev)->dev_attr.device_caps & \ 170 EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_##cap##_MASK) 171 172 #define is_reserved_cleared(reserved) \ 173 !memchr_inv(reserved, 0, sizeof(reserved)) 174 175 static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr, 176 size_t size, enum dma_data_direction dir) 177 { 178 void *addr; 179 180 addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO); 181 if (!addr) 182 return NULL; 183 184 *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir); 185 if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) { 186 ibdev_err(&dev->ibdev, "Failed to map DMA address\n"); 187 free_pages_exact(addr, size); 188 return NULL; 189 } 190 191 return addr; 192 } 193 194 static void efa_free_mapped(struct efa_dev *dev, void *cpu_addr, 195 dma_addr_t dma_addr, 196 size_t size, enum dma_data_direction dir) 197 { 198 dma_unmap_single(&dev->pdev->dev, dma_addr, size, dir); 199 free_pages_exact(cpu_addr, size); 200 } 201 202 int efa_query_device(struct ib_device *ibdev, 203 struct ib_device_attr *props, 204 struct ib_udata *udata) 205 { 206 struct efa_com_get_device_attr_result *dev_attr; 207 struct efa_ibv_ex_query_device_resp resp = {}; 208 struct efa_dev *dev = to_edev(ibdev); 209 int err; 210 211 if (udata && udata->inlen && 212 !ib_is_udata_cleared(udata, 0, udata->inlen)) { 213 ibdev_dbg(ibdev, 214 "Incompatible ABI params, udata not cleared\n"); 215 return -EINVAL; 216 } 217 218 dev_attr = &dev->dev_attr; 219 220 memset(props, 0, sizeof(*props)); 221 props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE; 222 props->page_size_cap = dev_attr->page_size_cap; 223 props->vendor_id = dev->pdev->vendor; 224 props->vendor_part_id = dev->pdev->device; 225 props->hw_ver = dev->pdev->subsystem_device; 226 props->max_qp = dev_attr->max_qp; 227 props->max_cq = dev_attr->max_cq; 228 props->max_pd = dev_attr->max_pd; 229 props->max_mr = dev_attr->max_mr; 230 props->max_ah = dev_attr->max_ah; 231 props->max_cqe = dev_attr->max_cq_depth; 232 props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth, 233 dev_attr->max_rq_depth); 234 props->max_send_sge = dev_attr->max_sq_sge; 235 props->max_recv_sge = dev_attr->max_rq_sge; 236 props->max_sge_rd = dev_attr->max_wr_rdma_sge; 237 props->max_pkeys = 1; 238 239 if (udata && udata->outlen) { 240 resp.max_sq_sge = dev_attr->max_sq_sge; 241 resp.max_rq_sge = dev_attr->max_rq_sge; 242 resp.max_sq_wr = dev_attr->max_sq_depth; 243 resp.max_rq_wr = dev_attr->max_rq_depth; 244 resp.max_rdma_size = dev_attr->max_rdma_size; 245 246 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_WITH_SGID; 247 if (EFA_DEV_CAP(dev, RDMA_READ)) 248 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ; 249 250 if (EFA_DEV_CAP(dev, RNR_RETRY)) 251 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY; 252 253 if (EFA_DEV_CAP(dev, DATA_POLLING_128)) 254 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_DATA_POLLING_128; 255 256 if (EFA_DEV_CAP(dev, RDMA_WRITE)) 257 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_WRITE; 258 259 if (dev->neqs) 260 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS; 261 262 err = ib_copy_to_udata(udata, &resp, 263 min(sizeof(resp), udata->outlen)); 264 if (err) { 265 ibdev_dbg(ibdev, 266 "Failed to copy udata for query_device\n"); 267 return err; 268 } 269 } 270 271 return 0; 272 } 273 274 int efa_query_port(struct ib_device *ibdev, u32 port, 275 struct ib_port_attr *props) 276 { 277 struct efa_dev *dev = to_edev(ibdev); 278 279 props->lmc = 1; 280 281 props->state = IB_PORT_ACTIVE; 282 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP; 283 props->gid_tbl_len = 1; 284 props->pkey_tbl_len = 1; 285 props->active_speed = IB_SPEED_EDR; 286 props->active_width = IB_WIDTH_4X; 287 props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu); 288 props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu); 289 props->max_msg_sz = dev->dev_attr.mtu; 290 props->max_vl_num = 1; 291 292 return 0; 293 } 294 295 int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, 296 int qp_attr_mask, 297 struct ib_qp_init_attr *qp_init_attr) 298 { 299 struct efa_dev *dev = to_edev(ibqp->device); 300 struct efa_com_query_qp_params params = {}; 301 struct efa_com_query_qp_result result; 302 struct efa_qp *qp = to_eqp(ibqp); 303 int err; 304 305 #define EFA_QUERY_QP_SUPP_MASK \ 306 (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \ 307 IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP | IB_QP_RNR_RETRY) 308 309 if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) { 310 ibdev_dbg(&dev->ibdev, 311 "Unsupported qp_attr_mask[%#x] supported[%#x]\n", 312 qp_attr_mask, EFA_QUERY_QP_SUPP_MASK); 313 return -EOPNOTSUPP; 314 } 315 316 memset(qp_attr, 0, sizeof(*qp_attr)); 317 memset(qp_init_attr, 0, sizeof(*qp_init_attr)); 318 319 params.qp_handle = qp->qp_handle; 320 err = efa_com_query_qp(&dev->edev, ¶ms, &result); 321 if (err) 322 return err; 323 324 qp_attr->qp_state = result.qp_state; 325 qp_attr->qkey = result.qkey; 326 qp_attr->sq_psn = result.sq_psn; 327 qp_attr->sq_draining = result.sq_draining; 328 qp_attr->port_num = 1; 329 qp_attr->rnr_retry = result.rnr_retry; 330 331 qp_attr->cap.max_send_wr = qp->max_send_wr; 332 qp_attr->cap.max_recv_wr = qp->max_recv_wr; 333 qp_attr->cap.max_send_sge = qp->max_send_sge; 334 qp_attr->cap.max_recv_sge = qp->max_recv_sge; 335 qp_attr->cap.max_inline_data = qp->max_inline_data; 336 337 qp_init_attr->qp_type = ibqp->qp_type; 338 qp_init_attr->recv_cq = ibqp->recv_cq; 339 qp_init_attr->send_cq = ibqp->send_cq; 340 qp_init_attr->qp_context = ibqp->qp_context; 341 qp_init_attr->cap = qp_attr->cap; 342 343 return 0; 344 } 345 346 int efa_query_gid(struct ib_device *ibdev, u32 port, int index, 347 union ib_gid *gid) 348 { 349 struct efa_dev *dev = to_edev(ibdev); 350 351 memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr)); 352 353 return 0; 354 } 355 356 int efa_query_pkey(struct ib_device *ibdev, u32 port, u16 index, 357 u16 *pkey) 358 { 359 if (index > 0) 360 return -EINVAL; 361 362 *pkey = 0xffff; 363 return 0; 364 } 365 366 static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn) 367 { 368 struct efa_com_dealloc_pd_params params = { 369 .pdn = pdn, 370 }; 371 372 return efa_com_dealloc_pd(&dev->edev, ¶ms); 373 } 374 375 int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 376 { 377 struct efa_dev *dev = to_edev(ibpd->device); 378 struct efa_ibv_alloc_pd_resp resp = {}; 379 struct efa_com_alloc_pd_result result; 380 struct efa_pd *pd = to_epd(ibpd); 381 int err; 382 383 if (udata->inlen && 384 !ib_is_udata_cleared(udata, 0, udata->inlen)) { 385 ibdev_dbg(&dev->ibdev, 386 "Incompatible ABI params, udata not cleared\n"); 387 err = -EINVAL; 388 goto err_out; 389 } 390 391 err = efa_com_alloc_pd(&dev->edev, &result); 392 if (err) 393 goto err_out; 394 395 pd->pdn = result.pdn; 396 resp.pdn = result.pdn; 397 398 if (udata->outlen) { 399 err = ib_copy_to_udata(udata, &resp, 400 min(sizeof(resp), udata->outlen)); 401 if (err) { 402 ibdev_dbg(&dev->ibdev, 403 "Failed to copy udata for alloc_pd\n"); 404 goto err_dealloc_pd; 405 } 406 } 407 408 ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn); 409 410 return 0; 411 412 err_dealloc_pd: 413 efa_pd_dealloc(dev, result.pdn); 414 err_out: 415 atomic64_inc(&dev->stats.alloc_pd_err); 416 return err; 417 } 418 419 int efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 420 { 421 struct efa_dev *dev = to_edev(ibpd->device); 422 struct efa_pd *pd = to_epd(ibpd); 423 424 ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn); 425 efa_pd_dealloc(dev, pd->pdn); 426 return 0; 427 } 428 429 static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle) 430 { 431 struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle }; 432 433 return efa_com_destroy_qp(&dev->edev, ¶ms); 434 } 435 436 static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp) 437 { 438 rdma_user_mmap_entry_remove(qp->rq_mmap_entry); 439 rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry); 440 rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry); 441 rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry); 442 } 443 444 int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) 445 { 446 struct efa_dev *dev = to_edev(ibqp->pd->device); 447 struct efa_qp *qp = to_eqp(ibqp); 448 int err; 449 450 ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num); 451 452 efa_qp_user_mmap_entries_remove(qp); 453 454 err = efa_destroy_qp_handle(dev, qp->qp_handle); 455 if (err) 456 return err; 457 458 if (qp->rq_cpu_addr) { 459 ibdev_dbg(&dev->ibdev, 460 "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n", 461 qp->rq_cpu_addr, qp->rq_size, 462 &qp->rq_dma_addr); 463 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr, 464 qp->rq_size, DMA_TO_DEVICE); 465 } 466 467 return 0; 468 } 469 470 static struct rdma_user_mmap_entry* 471 efa_user_mmap_entry_insert(struct ib_ucontext *ucontext, 472 u64 address, size_t length, 473 u8 mmap_flag, u64 *offset) 474 { 475 struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL); 476 int err; 477 478 if (!entry) 479 return NULL; 480 481 entry->address = address; 482 entry->mmap_flag = mmap_flag; 483 484 err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry, 485 length); 486 if (err) { 487 kfree(entry); 488 return NULL; 489 } 490 *offset = rdma_user_mmap_get_offset(&entry->rdma_entry); 491 492 return &entry->rdma_entry; 493 } 494 495 static int qp_mmap_entries_setup(struct efa_qp *qp, 496 struct efa_dev *dev, 497 struct efa_ucontext *ucontext, 498 struct efa_com_create_qp_params *params, 499 struct efa_ibv_create_qp_resp *resp) 500 { 501 size_t length; 502 u64 address; 503 504 address = dev->db_bar_addr + resp->sq_db_offset; 505 qp->sq_db_mmap_entry = 506 efa_user_mmap_entry_insert(&ucontext->ibucontext, 507 address, 508 PAGE_SIZE, EFA_MMAP_IO_NC, 509 &resp->sq_db_mmap_key); 510 if (!qp->sq_db_mmap_entry) 511 return -ENOMEM; 512 513 resp->sq_db_offset &= ~PAGE_MASK; 514 515 address = dev->mem_bar_addr + resp->llq_desc_offset; 516 length = PAGE_ALIGN(params->sq_ring_size_in_bytes + 517 (resp->llq_desc_offset & ~PAGE_MASK)); 518 519 qp->llq_desc_mmap_entry = 520 efa_user_mmap_entry_insert(&ucontext->ibucontext, 521 address, length, 522 EFA_MMAP_IO_WC, 523 &resp->llq_desc_mmap_key); 524 if (!qp->llq_desc_mmap_entry) 525 goto err_remove_mmap; 526 527 resp->llq_desc_offset &= ~PAGE_MASK; 528 529 if (qp->rq_size) { 530 address = dev->db_bar_addr + resp->rq_db_offset; 531 532 qp->rq_db_mmap_entry = 533 efa_user_mmap_entry_insert(&ucontext->ibucontext, 534 address, PAGE_SIZE, 535 EFA_MMAP_IO_NC, 536 &resp->rq_db_mmap_key); 537 if (!qp->rq_db_mmap_entry) 538 goto err_remove_mmap; 539 540 resp->rq_db_offset &= ~PAGE_MASK; 541 542 address = virt_to_phys(qp->rq_cpu_addr); 543 qp->rq_mmap_entry = 544 efa_user_mmap_entry_insert(&ucontext->ibucontext, 545 address, qp->rq_size, 546 EFA_MMAP_DMA_PAGE, 547 &resp->rq_mmap_key); 548 if (!qp->rq_mmap_entry) 549 goto err_remove_mmap; 550 551 resp->rq_mmap_size = qp->rq_size; 552 } 553 554 return 0; 555 556 err_remove_mmap: 557 efa_qp_user_mmap_entries_remove(qp); 558 559 return -ENOMEM; 560 } 561 562 static int efa_qp_validate_cap(struct efa_dev *dev, 563 struct ib_qp_init_attr *init_attr) 564 { 565 if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) { 566 ibdev_dbg(&dev->ibdev, 567 "qp: requested send wr[%u] exceeds the max[%u]\n", 568 init_attr->cap.max_send_wr, 569 dev->dev_attr.max_sq_depth); 570 return -EINVAL; 571 } 572 if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) { 573 ibdev_dbg(&dev->ibdev, 574 "qp: requested receive wr[%u] exceeds the max[%u]\n", 575 init_attr->cap.max_recv_wr, 576 dev->dev_attr.max_rq_depth); 577 return -EINVAL; 578 } 579 if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) { 580 ibdev_dbg(&dev->ibdev, 581 "qp: requested sge send[%u] exceeds the max[%u]\n", 582 init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge); 583 return -EINVAL; 584 } 585 if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) { 586 ibdev_dbg(&dev->ibdev, 587 "qp: requested sge recv[%u] exceeds the max[%u]\n", 588 init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge); 589 return -EINVAL; 590 } 591 if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) { 592 ibdev_dbg(&dev->ibdev, 593 "qp: requested inline data[%u] exceeds the max[%u]\n", 594 init_attr->cap.max_inline_data, 595 dev->dev_attr.inline_buf_size); 596 return -EINVAL; 597 } 598 599 return 0; 600 } 601 602 static int efa_qp_validate_attr(struct efa_dev *dev, 603 struct ib_qp_init_attr *init_attr) 604 { 605 if (init_attr->qp_type != IB_QPT_DRIVER && 606 init_attr->qp_type != IB_QPT_UD) { 607 ibdev_dbg(&dev->ibdev, 608 "Unsupported qp type %d\n", init_attr->qp_type); 609 return -EOPNOTSUPP; 610 } 611 612 if (init_attr->srq) { 613 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n"); 614 return -EOPNOTSUPP; 615 } 616 617 if (init_attr->create_flags) { 618 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n"); 619 return -EOPNOTSUPP; 620 } 621 622 return 0; 623 } 624 625 int efa_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr, 626 struct ib_udata *udata) 627 { 628 struct efa_com_create_qp_params create_qp_params = {}; 629 struct efa_com_create_qp_result create_qp_resp; 630 struct efa_dev *dev = to_edev(ibqp->device); 631 struct efa_ibv_create_qp_resp resp = {}; 632 struct efa_ibv_create_qp cmd = {}; 633 struct efa_qp *qp = to_eqp(ibqp); 634 struct efa_ucontext *ucontext; 635 int err; 636 637 ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext, 638 ibucontext); 639 640 err = efa_qp_validate_cap(dev, init_attr); 641 if (err) 642 goto err_out; 643 644 err = efa_qp_validate_attr(dev, init_attr); 645 if (err) 646 goto err_out; 647 648 if (offsetofend(typeof(cmd), driver_qp_type) > udata->inlen) { 649 ibdev_dbg(&dev->ibdev, 650 "Incompatible ABI params, no input udata\n"); 651 err = -EINVAL; 652 goto err_out; 653 } 654 655 if (udata->inlen > sizeof(cmd) && 656 !ib_is_udata_cleared(udata, sizeof(cmd), 657 udata->inlen - sizeof(cmd))) { 658 ibdev_dbg(&dev->ibdev, 659 "Incompatible ABI params, unknown fields in udata\n"); 660 err = -EINVAL; 661 goto err_out; 662 } 663 664 err = ib_copy_from_udata(&cmd, udata, 665 min(sizeof(cmd), udata->inlen)); 666 if (err) { 667 ibdev_dbg(&dev->ibdev, 668 "Cannot copy udata for create_qp\n"); 669 goto err_out; 670 } 671 672 if (cmd.comp_mask) { 673 ibdev_dbg(&dev->ibdev, 674 "Incompatible ABI params, unknown fields in udata\n"); 675 err = -EINVAL; 676 goto err_out; 677 } 678 679 create_qp_params.uarn = ucontext->uarn; 680 create_qp_params.pd = to_epd(ibqp->pd)->pdn; 681 682 if (init_attr->qp_type == IB_QPT_UD) { 683 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD; 684 } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) { 685 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD; 686 } else { 687 ibdev_dbg(&dev->ibdev, 688 "Unsupported qp type %d driver qp type %d\n", 689 init_attr->qp_type, cmd.driver_qp_type); 690 err = -EOPNOTSUPP; 691 goto err_out; 692 } 693 694 ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n", 695 init_attr->qp_type, cmd.driver_qp_type); 696 create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx; 697 create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx; 698 create_qp_params.sq_depth = init_attr->cap.max_send_wr; 699 create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size; 700 701 create_qp_params.rq_depth = init_attr->cap.max_recv_wr; 702 create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size; 703 qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes); 704 if (qp->rq_size) { 705 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr, 706 qp->rq_size, DMA_TO_DEVICE); 707 if (!qp->rq_cpu_addr) { 708 err = -ENOMEM; 709 goto err_out; 710 } 711 712 ibdev_dbg(&dev->ibdev, 713 "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n", 714 qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr); 715 create_qp_params.rq_base_addr = qp->rq_dma_addr; 716 } 717 718 err = efa_com_create_qp(&dev->edev, &create_qp_params, 719 &create_qp_resp); 720 if (err) 721 goto err_free_mapped; 722 723 resp.sq_db_offset = create_qp_resp.sq_db_offset; 724 resp.rq_db_offset = create_qp_resp.rq_db_offset; 725 resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset; 726 resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx; 727 resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx; 728 729 err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params, 730 &resp); 731 if (err) 732 goto err_destroy_qp; 733 734 qp->qp_handle = create_qp_resp.qp_handle; 735 qp->ibqp.qp_num = create_qp_resp.qp_num; 736 qp->max_send_wr = init_attr->cap.max_send_wr; 737 qp->max_recv_wr = init_attr->cap.max_recv_wr; 738 qp->max_send_sge = init_attr->cap.max_send_sge; 739 qp->max_recv_sge = init_attr->cap.max_recv_sge; 740 qp->max_inline_data = init_attr->cap.max_inline_data; 741 742 if (udata->outlen) { 743 err = ib_copy_to_udata(udata, &resp, 744 min(sizeof(resp), udata->outlen)); 745 if (err) { 746 ibdev_dbg(&dev->ibdev, 747 "Failed to copy udata for qp[%u]\n", 748 create_qp_resp.qp_num); 749 goto err_remove_mmap_entries; 750 } 751 } 752 753 ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num); 754 755 return 0; 756 757 err_remove_mmap_entries: 758 efa_qp_user_mmap_entries_remove(qp); 759 err_destroy_qp: 760 efa_destroy_qp_handle(dev, create_qp_resp.qp_handle); 761 err_free_mapped: 762 if (qp->rq_size) 763 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr, 764 qp->rq_size, DMA_TO_DEVICE); 765 err_out: 766 atomic64_inc(&dev->stats.create_qp_err); 767 return err; 768 } 769 770 static const struct { 771 int valid; 772 enum ib_qp_attr_mask req_param; 773 enum ib_qp_attr_mask opt_param; 774 } srd_qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 775 [IB_QPS_RESET] = { 776 [IB_QPS_RESET] = { .valid = 1 }, 777 [IB_QPS_INIT] = { 778 .valid = 1, 779 .req_param = IB_QP_PKEY_INDEX | 780 IB_QP_PORT | 781 IB_QP_QKEY, 782 }, 783 }, 784 [IB_QPS_INIT] = { 785 [IB_QPS_RESET] = { .valid = 1 }, 786 [IB_QPS_ERR] = { .valid = 1 }, 787 [IB_QPS_INIT] = { 788 .valid = 1, 789 .opt_param = IB_QP_PKEY_INDEX | 790 IB_QP_PORT | 791 IB_QP_QKEY, 792 }, 793 [IB_QPS_RTR] = { 794 .valid = 1, 795 .opt_param = IB_QP_PKEY_INDEX | 796 IB_QP_QKEY, 797 }, 798 }, 799 [IB_QPS_RTR] = { 800 [IB_QPS_RESET] = { .valid = 1 }, 801 [IB_QPS_ERR] = { .valid = 1 }, 802 [IB_QPS_RTS] = { 803 .valid = 1, 804 .req_param = IB_QP_SQ_PSN, 805 .opt_param = IB_QP_CUR_STATE | 806 IB_QP_QKEY | 807 IB_QP_RNR_RETRY, 808 809 } 810 }, 811 [IB_QPS_RTS] = { 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_EN_SQD_ASYNC_NOTIFY, 822 }, 823 }, 824 [IB_QPS_SQD] = { 825 [IB_QPS_RESET] = { .valid = 1 }, 826 [IB_QPS_ERR] = { .valid = 1 }, 827 [IB_QPS_RTS] = { 828 .valid = 1, 829 .opt_param = IB_QP_CUR_STATE | 830 IB_QP_QKEY, 831 }, 832 [IB_QPS_SQD] = { 833 .valid = 1, 834 .opt_param = IB_QP_PKEY_INDEX | 835 IB_QP_QKEY, 836 } 837 }, 838 [IB_QPS_SQE] = { 839 [IB_QPS_RESET] = { .valid = 1 }, 840 [IB_QPS_ERR] = { .valid = 1 }, 841 [IB_QPS_RTS] = { 842 .valid = 1, 843 .opt_param = IB_QP_CUR_STATE | 844 IB_QP_QKEY, 845 } 846 }, 847 [IB_QPS_ERR] = { 848 [IB_QPS_RESET] = { .valid = 1 }, 849 [IB_QPS_ERR] = { .valid = 1 }, 850 } 851 }; 852 853 static bool efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state, 854 enum ib_qp_state next_state, 855 enum ib_qp_attr_mask mask) 856 { 857 enum ib_qp_attr_mask req_param, opt_param; 858 859 if (mask & IB_QP_CUR_STATE && 860 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 861 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 862 return false; 863 864 if (!srd_qp_state_table[cur_state][next_state].valid) 865 return false; 866 867 req_param = srd_qp_state_table[cur_state][next_state].req_param; 868 opt_param = srd_qp_state_table[cur_state][next_state].opt_param; 869 870 if ((mask & req_param) != req_param) 871 return false; 872 873 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 874 return false; 875 876 return true; 877 } 878 879 static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp, 880 struct ib_qp_attr *qp_attr, int qp_attr_mask, 881 enum ib_qp_state cur_state, 882 enum ib_qp_state new_state) 883 { 884 int err; 885 886 #define EFA_MODIFY_QP_SUPP_MASK \ 887 (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \ 888 IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN | \ 889 IB_QP_RNR_RETRY) 890 891 if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) { 892 ibdev_dbg(&dev->ibdev, 893 "Unsupported qp_attr_mask[%#x] supported[%#x]\n", 894 qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK); 895 return -EOPNOTSUPP; 896 } 897 898 if (qp->ibqp.qp_type == IB_QPT_DRIVER) 899 err = !efa_modify_srd_qp_is_ok(cur_state, new_state, 900 qp_attr_mask); 901 else 902 err = !ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD, 903 qp_attr_mask); 904 905 if (err) { 906 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n"); 907 return -EINVAL; 908 } 909 910 if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) { 911 ibdev_dbg(&dev->ibdev, "Can't change port num\n"); 912 return -EOPNOTSUPP; 913 } 914 915 if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) { 916 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n"); 917 return -EOPNOTSUPP; 918 } 919 920 return 0; 921 } 922 923 int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, 924 int qp_attr_mask, struct ib_udata *udata) 925 { 926 struct efa_dev *dev = to_edev(ibqp->device); 927 struct efa_com_modify_qp_params params = {}; 928 struct efa_qp *qp = to_eqp(ibqp); 929 enum ib_qp_state cur_state; 930 enum ib_qp_state new_state; 931 int err; 932 933 if (qp_attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 934 return -EOPNOTSUPP; 935 936 if (udata->inlen && 937 !ib_is_udata_cleared(udata, 0, udata->inlen)) { 938 ibdev_dbg(&dev->ibdev, 939 "Incompatible ABI params, udata not cleared\n"); 940 return -EINVAL; 941 } 942 943 cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state : 944 qp->state; 945 new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state; 946 947 err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state, 948 new_state); 949 if (err) 950 return err; 951 952 params.qp_handle = qp->qp_handle; 953 954 if (qp_attr_mask & IB_QP_STATE) { 955 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QP_STATE, 956 1); 957 EFA_SET(¶ms.modify_mask, 958 EFA_ADMIN_MODIFY_QP_CMD_CUR_QP_STATE, 1); 959 params.cur_qp_state = cur_state; 960 params.qp_state = new_state; 961 } 962 963 if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) { 964 EFA_SET(¶ms.modify_mask, 965 EFA_ADMIN_MODIFY_QP_CMD_SQ_DRAINED_ASYNC_NOTIFY, 1); 966 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify; 967 } 968 969 if (qp_attr_mask & IB_QP_QKEY) { 970 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QKEY, 1); 971 params.qkey = qp_attr->qkey; 972 } 973 974 if (qp_attr_mask & IB_QP_SQ_PSN) { 975 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_SQ_PSN, 1); 976 params.sq_psn = qp_attr->sq_psn; 977 } 978 979 if (qp_attr_mask & IB_QP_RNR_RETRY) { 980 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY, 981 1); 982 params.rnr_retry = qp_attr->rnr_retry; 983 } 984 985 err = efa_com_modify_qp(&dev->edev, ¶ms); 986 if (err) 987 return err; 988 989 qp->state = new_state; 990 991 return 0; 992 } 993 994 static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx) 995 { 996 struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx }; 997 998 return efa_com_destroy_cq(&dev->edev, ¶ms); 999 } 1000 1001 static void efa_cq_user_mmap_entries_remove(struct efa_cq *cq) 1002 { 1003 rdma_user_mmap_entry_remove(cq->db_mmap_entry); 1004 rdma_user_mmap_entry_remove(cq->mmap_entry); 1005 } 1006 1007 int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata) 1008 { 1009 struct efa_dev *dev = to_edev(ibcq->device); 1010 struct efa_cq *cq = to_ecq(ibcq); 1011 1012 ibdev_dbg(&dev->ibdev, 1013 "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n", 1014 cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr); 1015 1016 efa_cq_user_mmap_entries_remove(cq); 1017 efa_destroy_cq_idx(dev, cq->cq_idx); 1018 if (cq->eq) { 1019 xa_erase(&dev->cqs_xa, cq->cq_idx); 1020 synchronize_irq(cq->eq->irq.irqn); 1021 } 1022 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size, 1023 DMA_FROM_DEVICE); 1024 return 0; 1025 } 1026 1027 static struct efa_eq *efa_vec2eq(struct efa_dev *dev, int vec) 1028 { 1029 return &dev->eqs[vec]; 1030 } 1031 1032 static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq, 1033 struct efa_ibv_create_cq_resp *resp, 1034 bool db_valid) 1035 { 1036 resp->q_mmap_size = cq->size; 1037 cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext, 1038 virt_to_phys(cq->cpu_addr), 1039 cq->size, EFA_MMAP_DMA_PAGE, 1040 &resp->q_mmap_key); 1041 if (!cq->mmap_entry) 1042 return -ENOMEM; 1043 1044 if (db_valid) { 1045 cq->db_mmap_entry = 1046 efa_user_mmap_entry_insert(&cq->ucontext->ibucontext, 1047 dev->db_bar_addr + resp->db_off, 1048 PAGE_SIZE, EFA_MMAP_IO_NC, 1049 &resp->db_mmap_key); 1050 if (!cq->db_mmap_entry) { 1051 rdma_user_mmap_entry_remove(cq->mmap_entry); 1052 return -ENOMEM; 1053 } 1054 1055 resp->db_off &= ~PAGE_MASK; 1056 resp->comp_mask |= EFA_CREATE_CQ_RESP_DB_OFF; 1057 } 1058 1059 return 0; 1060 } 1061 1062 int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, 1063 struct ib_udata *udata) 1064 { 1065 struct efa_ucontext *ucontext = rdma_udata_to_drv_context( 1066 udata, struct efa_ucontext, ibucontext); 1067 struct efa_com_create_cq_params params = {}; 1068 struct efa_ibv_create_cq_resp resp = {}; 1069 struct efa_com_create_cq_result result; 1070 struct ib_device *ibdev = ibcq->device; 1071 struct efa_dev *dev = to_edev(ibdev); 1072 struct efa_ibv_create_cq cmd = {}; 1073 struct efa_cq *cq = to_ecq(ibcq); 1074 int entries = attr->cqe; 1075 bool set_src_addr; 1076 int err; 1077 1078 ibdev_dbg(ibdev, "create_cq entries %d\n", entries); 1079 1080 if (attr->flags) 1081 return -EOPNOTSUPP; 1082 1083 if (entries < 1 || entries > dev->dev_attr.max_cq_depth) { 1084 ibdev_dbg(ibdev, 1085 "cq: requested entries[%u] non-positive or greater than max[%u]\n", 1086 entries, dev->dev_attr.max_cq_depth); 1087 err = -EINVAL; 1088 goto err_out; 1089 } 1090 1091 if (offsetofend(typeof(cmd), num_sub_cqs) > udata->inlen) { 1092 ibdev_dbg(ibdev, 1093 "Incompatible ABI params, no input udata\n"); 1094 err = -EINVAL; 1095 goto err_out; 1096 } 1097 1098 if (udata->inlen > sizeof(cmd) && 1099 !ib_is_udata_cleared(udata, sizeof(cmd), 1100 udata->inlen - sizeof(cmd))) { 1101 ibdev_dbg(ibdev, 1102 "Incompatible ABI params, unknown fields in udata\n"); 1103 err = -EINVAL; 1104 goto err_out; 1105 } 1106 1107 err = ib_copy_from_udata(&cmd, udata, 1108 min(sizeof(cmd), udata->inlen)); 1109 if (err) { 1110 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n"); 1111 goto err_out; 1112 } 1113 1114 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_58)) { 1115 ibdev_dbg(ibdev, 1116 "Incompatible ABI params, unknown fields in udata\n"); 1117 err = -EINVAL; 1118 goto err_out; 1119 } 1120 1121 set_src_addr = !!(cmd.flags & EFA_CREATE_CQ_WITH_SGID); 1122 if ((cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc_ex)) && 1123 (set_src_addr || 1124 cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc))) { 1125 ibdev_dbg(ibdev, 1126 "Invalid entry size [%u]\n", cmd.cq_entry_size); 1127 err = -EINVAL; 1128 goto err_out; 1129 } 1130 1131 if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) { 1132 ibdev_dbg(ibdev, 1133 "Invalid number of sub cqs[%u] expected[%u]\n", 1134 cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq); 1135 err = -EINVAL; 1136 goto err_out; 1137 } 1138 1139 cq->ucontext = ucontext; 1140 cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs); 1141 cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size, 1142 DMA_FROM_DEVICE); 1143 if (!cq->cpu_addr) { 1144 err = -ENOMEM; 1145 goto err_out; 1146 } 1147 1148 params.uarn = cq->ucontext->uarn; 1149 params.cq_depth = entries; 1150 params.dma_addr = cq->dma_addr; 1151 params.entry_size_in_bytes = cmd.cq_entry_size; 1152 params.num_sub_cqs = cmd.num_sub_cqs; 1153 params.set_src_addr = set_src_addr; 1154 if (cmd.flags & EFA_CREATE_CQ_WITH_COMPLETION_CHANNEL) { 1155 cq->eq = efa_vec2eq(dev, attr->comp_vector); 1156 params.eqn = cq->eq->eeq.eqn; 1157 params.interrupt_mode_enabled = true; 1158 } 1159 1160 err = efa_com_create_cq(&dev->edev, ¶ms, &result); 1161 if (err) 1162 goto err_free_mapped; 1163 1164 resp.db_off = result.db_off; 1165 resp.cq_idx = result.cq_idx; 1166 cq->cq_idx = result.cq_idx; 1167 cq->ibcq.cqe = result.actual_depth; 1168 WARN_ON_ONCE(entries != result.actual_depth); 1169 1170 err = cq_mmap_entries_setup(dev, cq, &resp, result.db_valid); 1171 if (err) { 1172 ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n", 1173 cq->cq_idx); 1174 goto err_destroy_cq; 1175 } 1176 1177 if (cq->eq) { 1178 err = xa_err(xa_store(&dev->cqs_xa, cq->cq_idx, cq, GFP_KERNEL)); 1179 if (err) { 1180 ibdev_dbg(ibdev, "Failed to store cq[%u] in xarray\n", 1181 cq->cq_idx); 1182 goto err_remove_mmap; 1183 } 1184 } 1185 1186 if (udata->outlen) { 1187 err = ib_copy_to_udata(udata, &resp, 1188 min(sizeof(resp), udata->outlen)); 1189 if (err) { 1190 ibdev_dbg(ibdev, 1191 "Failed to copy udata for create_cq\n"); 1192 goto err_xa_erase; 1193 } 1194 } 1195 1196 ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n", 1197 cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr); 1198 1199 return 0; 1200 1201 err_xa_erase: 1202 if (cq->eq) 1203 xa_erase(&dev->cqs_xa, cq->cq_idx); 1204 err_remove_mmap: 1205 efa_cq_user_mmap_entries_remove(cq); 1206 err_destroy_cq: 1207 efa_destroy_cq_idx(dev, cq->cq_idx); 1208 err_free_mapped: 1209 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size, 1210 DMA_FROM_DEVICE); 1211 1212 err_out: 1213 atomic64_inc(&dev->stats.create_cq_err); 1214 return err; 1215 } 1216 1217 static int umem_to_page_list(struct efa_dev *dev, 1218 struct ib_umem *umem, 1219 u64 *page_list, 1220 u32 hp_cnt, 1221 u8 hp_shift) 1222 { 1223 u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT); 1224 struct ib_block_iter biter; 1225 unsigned int hp_idx = 0; 1226 1227 ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n", 1228 hp_cnt, pages_in_hp); 1229 1230 rdma_umem_for_each_dma_block(umem, &biter, BIT(hp_shift)) 1231 page_list[hp_idx++] = rdma_block_iter_dma_address(&biter); 1232 1233 return 0; 1234 } 1235 1236 static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt) 1237 { 1238 struct scatterlist *sglist; 1239 struct page *pg; 1240 int i; 1241 1242 sglist = kmalloc_array(page_cnt, sizeof(*sglist), GFP_KERNEL); 1243 if (!sglist) 1244 return NULL; 1245 sg_init_table(sglist, page_cnt); 1246 for (i = 0; i < page_cnt; i++) { 1247 pg = vmalloc_to_page(buf); 1248 if (!pg) 1249 goto err; 1250 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0); 1251 buf += PAGE_SIZE / sizeof(*buf); 1252 } 1253 return sglist; 1254 1255 err: 1256 kfree(sglist); 1257 return NULL; 1258 } 1259 1260 /* 1261 * create a chunk list of physical pages dma addresses from the supplied 1262 * scatter gather list 1263 */ 1264 static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl) 1265 { 1266 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list; 1267 int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages; 1268 struct scatterlist *pages_sgl = pbl->phys.indirect.sgl; 1269 unsigned int chunk_list_size, chunk_idx, payload_idx; 1270 int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt; 1271 struct efa_com_ctrl_buff_info *ctrl_buf; 1272 u64 *cur_chunk_buf, *prev_chunk_buf; 1273 struct ib_block_iter biter; 1274 dma_addr_t dma_addr; 1275 int i; 1276 1277 /* allocate a chunk list that consists of 4KB chunks */ 1278 chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK); 1279 1280 chunk_list->size = chunk_list_size; 1281 chunk_list->chunks = kcalloc(chunk_list_size, 1282 sizeof(*chunk_list->chunks), 1283 GFP_KERNEL); 1284 if (!chunk_list->chunks) 1285 return -ENOMEM; 1286 1287 ibdev_dbg(&dev->ibdev, 1288 "chunk_list_size[%u] - pages[%u]\n", chunk_list_size, 1289 page_cnt); 1290 1291 /* allocate chunk buffers: */ 1292 for (i = 0; i < chunk_list_size; i++) { 1293 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL); 1294 if (!chunk_list->chunks[i].buf) 1295 goto chunk_list_dealloc; 1296 1297 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE; 1298 } 1299 chunk_list->chunks[chunk_list_size - 1].length = 1300 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) + 1301 EFA_CHUNK_PTR_SIZE; 1302 1303 /* fill the dma addresses of sg list pages to chunks: */ 1304 chunk_idx = 0; 1305 payload_idx = 0; 1306 cur_chunk_buf = chunk_list->chunks[0].buf; 1307 rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt, 1308 EFA_CHUNK_PAYLOAD_SIZE) { 1309 cur_chunk_buf[payload_idx++] = 1310 rdma_block_iter_dma_address(&biter); 1311 1312 if (payload_idx == EFA_PTRS_PER_CHUNK) { 1313 chunk_idx++; 1314 cur_chunk_buf = chunk_list->chunks[chunk_idx].buf; 1315 payload_idx = 0; 1316 } 1317 } 1318 1319 /* map chunks to dma and fill chunks next ptrs */ 1320 for (i = chunk_list_size - 1; i >= 0; i--) { 1321 dma_addr = dma_map_single(&dev->pdev->dev, 1322 chunk_list->chunks[i].buf, 1323 chunk_list->chunks[i].length, 1324 DMA_TO_DEVICE); 1325 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) { 1326 ibdev_err(&dev->ibdev, 1327 "chunk[%u] dma_map_failed\n", i); 1328 goto chunk_list_unmap; 1329 } 1330 1331 chunk_list->chunks[i].dma_addr = dma_addr; 1332 ibdev_dbg(&dev->ibdev, 1333 "chunk[%u] mapped at [%pad]\n", i, &dma_addr); 1334 1335 if (!i) 1336 break; 1337 1338 prev_chunk_buf = chunk_list->chunks[i - 1].buf; 1339 1340 ctrl_buf = (struct efa_com_ctrl_buff_info *) 1341 &prev_chunk_buf[EFA_PTRS_PER_CHUNK]; 1342 ctrl_buf->length = chunk_list->chunks[i].length; 1343 1344 efa_com_set_dma_addr(dma_addr, 1345 &ctrl_buf->address.mem_addr_high, 1346 &ctrl_buf->address.mem_addr_low); 1347 } 1348 1349 return 0; 1350 1351 chunk_list_unmap: 1352 for (; i < chunk_list_size; i++) { 1353 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr, 1354 chunk_list->chunks[i].length, DMA_TO_DEVICE); 1355 } 1356 chunk_list_dealloc: 1357 for (i = 0; i < chunk_list_size; i++) 1358 kfree(chunk_list->chunks[i].buf); 1359 1360 kfree(chunk_list->chunks); 1361 return -ENOMEM; 1362 } 1363 1364 static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl) 1365 { 1366 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list; 1367 int i; 1368 1369 for (i = 0; i < chunk_list->size; i++) { 1370 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr, 1371 chunk_list->chunks[i].length, DMA_TO_DEVICE); 1372 kfree(chunk_list->chunks[i].buf); 1373 } 1374 1375 kfree(chunk_list->chunks); 1376 } 1377 1378 /* initialize pbl continuous mode: map pbl buffer to a dma address. */ 1379 static int pbl_continuous_initialize(struct efa_dev *dev, 1380 struct pbl_context *pbl) 1381 { 1382 dma_addr_t dma_addr; 1383 1384 dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf, 1385 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE); 1386 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) { 1387 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n"); 1388 return -ENOMEM; 1389 } 1390 1391 pbl->phys.continuous.dma_addr = dma_addr; 1392 ibdev_dbg(&dev->ibdev, 1393 "pbl continuous - dma_addr = %pad, size[%u]\n", 1394 &dma_addr, pbl->pbl_buf_size_in_bytes); 1395 1396 return 0; 1397 } 1398 1399 /* 1400 * initialize pbl indirect mode: 1401 * create a chunk list out of the dma addresses of the physical pages of 1402 * pbl buffer. 1403 */ 1404 static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl) 1405 { 1406 u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, EFA_CHUNK_PAYLOAD_SIZE); 1407 struct scatterlist *sgl; 1408 int sg_dma_cnt, err; 1409 1410 BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE); 1411 sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages); 1412 if (!sgl) 1413 return -ENOMEM; 1414 1415 sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE); 1416 if (!sg_dma_cnt) { 1417 err = -EINVAL; 1418 goto err_map; 1419 } 1420 1421 pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages; 1422 pbl->phys.indirect.sgl = sgl; 1423 pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt; 1424 err = pbl_chunk_list_create(dev, pbl); 1425 if (err) { 1426 ibdev_dbg(&dev->ibdev, 1427 "chunk_list creation failed[%d]\n", err); 1428 goto err_chunk; 1429 } 1430 1431 ibdev_dbg(&dev->ibdev, 1432 "pbl indirect - size[%u], chunks[%u]\n", 1433 pbl->pbl_buf_size_in_bytes, 1434 pbl->phys.indirect.chunk_list.size); 1435 1436 return 0; 1437 1438 err_chunk: 1439 dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE); 1440 err_map: 1441 kfree(sgl); 1442 return err; 1443 } 1444 1445 static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl) 1446 { 1447 pbl_chunk_list_destroy(dev, pbl); 1448 dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl, 1449 pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE); 1450 kfree(pbl->phys.indirect.sgl); 1451 } 1452 1453 /* create a page buffer list from a mapped user memory region */ 1454 static int pbl_create(struct efa_dev *dev, 1455 struct pbl_context *pbl, 1456 struct ib_umem *umem, 1457 int hp_cnt, 1458 u8 hp_shift) 1459 { 1460 int err; 1461 1462 pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE; 1463 pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL); 1464 if (!pbl->pbl_buf) 1465 return -ENOMEM; 1466 1467 if (is_vmalloc_addr(pbl->pbl_buf)) { 1468 pbl->physically_continuous = 0; 1469 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt, 1470 hp_shift); 1471 if (err) 1472 goto err_free; 1473 1474 err = pbl_indirect_initialize(dev, pbl); 1475 if (err) 1476 goto err_free; 1477 } else { 1478 pbl->physically_continuous = 1; 1479 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt, 1480 hp_shift); 1481 if (err) 1482 goto err_free; 1483 1484 err = pbl_continuous_initialize(dev, pbl); 1485 if (err) 1486 goto err_free; 1487 } 1488 1489 ibdev_dbg(&dev->ibdev, 1490 "user_pbl_created: user_pages[%u], continuous[%u]\n", 1491 hp_cnt, pbl->physically_continuous); 1492 1493 return 0; 1494 1495 err_free: 1496 kvfree(pbl->pbl_buf); 1497 return err; 1498 } 1499 1500 static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl) 1501 { 1502 if (pbl->physically_continuous) 1503 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr, 1504 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE); 1505 else 1506 pbl_indirect_terminate(dev, pbl); 1507 1508 kvfree(pbl->pbl_buf); 1509 } 1510 1511 static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr, 1512 struct efa_com_reg_mr_params *params) 1513 { 1514 int err; 1515 1516 params->inline_pbl = 1; 1517 err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array, 1518 params->page_num, params->page_shift); 1519 if (err) 1520 return err; 1521 1522 ibdev_dbg(&dev->ibdev, 1523 "inline_pbl_array - pages[%u]\n", params->page_num); 1524 1525 return 0; 1526 } 1527 1528 static int efa_create_pbl(struct efa_dev *dev, 1529 struct pbl_context *pbl, 1530 struct efa_mr *mr, 1531 struct efa_com_reg_mr_params *params) 1532 { 1533 int err; 1534 1535 err = pbl_create(dev, pbl, mr->umem, params->page_num, 1536 params->page_shift); 1537 if (err) { 1538 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err); 1539 return err; 1540 } 1541 1542 params->inline_pbl = 0; 1543 params->indirect = !pbl->physically_continuous; 1544 if (pbl->physically_continuous) { 1545 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes; 1546 1547 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr, 1548 ¶ms->pbl.pbl.address.mem_addr_high, 1549 ¶ms->pbl.pbl.address.mem_addr_low); 1550 } else { 1551 params->pbl.pbl.length = 1552 pbl->phys.indirect.chunk_list.chunks[0].length; 1553 1554 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr, 1555 ¶ms->pbl.pbl.address.mem_addr_high, 1556 ¶ms->pbl.pbl.address.mem_addr_low); 1557 } 1558 1559 return 0; 1560 } 1561 1562 static struct efa_mr *efa_alloc_mr(struct ib_pd *ibpd, int access_flags, 1563 struct ib_udata *udata) 1564 { 1565 struct efa_dev *dev = to_edev(ibpd->device); 1566 int supp_access_flags; 1567 struct efa_mr *mr; 1568 1569 if (udata && udata->inlen && 1570 !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) { 1571 ibdev_dbg(&dev->ibdev, 1572 "Incompatible ABI params, udata not cleared\n"); 1573 return ERR_PTR(-EINVAL); 1574 } 1575 1576 supp_access_flags = 1577 IB_ACCESS_LOCAL_WRITE | 1578 (EFA_DEV_CAP(dev, RDMA_READ) ? IB_ACCESS_REMOTE_READ : 0) | 1579 (EFA_DEV_CAP(dev, RDMA_WRITE) ? IB_ACCESS_REMOTE_WRITE : 0); 1580 1581 access_flags &= ~IB_ACCESS_OPTIONAL; 1582 if (access_flags & ~supp_access_flags) { 1583 ibdev_dbg(&dev->ibdev, 1584 "Unsupported access flags[%#x], supported[%#x]\n", 1585 access_flags, supp_access_flags); 1586 return ERR_PTR(-EOPNOTSUPP); 1587 } 1588 1589 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 1590 if (!mr) 1591 return ERR_PTR(-ENOMEM); 1592 1593 return mr; 1594 } 1595 1596 static int efa_register_mr(struct ib_pd *ibpd, struct efa_mr *mr, u64 start, 1597 u64 length, u64 virt_addr, int access_flags) 1598 { 1599 struct efa_dev *dev = to_edev(ibpd->device); 1600 struct efa_com_reg_mr_params params = {}; 1601 struct efa_com_reg_mr_result result = {}; 1602 struct pbl_context pbl; 1603 unsigned int pg_sz; 1604 int inline_size; 1605 int err; 1606 1607 params.pd = to_epd(ibpd)->pdn; 1608 params.iova = virt_addr; 1609 params.mr_length_in_bytes = length; 1610 params.permissions = access_flags; 1611 1612 pg_sz = ib_umem_find_best_pgsz(mr->umem, 1613 dev->dev_attr.page_size_cap, 1614 virt_addr); 1615 if (!pg_sz) { 1616 ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n", 1617 dev->dev_attr.page_size_cap); 1618 return -EOPNOTSUPP; 1619 } 1620 1621 params.page_shift = order_base_2(pg_sz); 1622 params.page_num = ib_umem_num_dma_blocks(mr->umem, pg_sz); 1623 1624 ibdev_dbg(&dev->ibdev, 1625 "start %#llx length %#llx params.page_shift %u params.page_num %u\n", 1626 start, length, params.page_shift, params.page_num); 1627 1628 inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array); 1629 if (params.page_num <= inline_size) { 1630 err = efa_create_inline_pbl(dev, mr, ¶ms); 1631 if (err) 1632 return err; 1633 1634 err = efa_com_register_mr(&dev->edev, ¶ms, &result); 1635 if (err) 1636 return err; 1637 } else { 1638 err = efa_create_pbl(dev, &pbl, mr, ¶ms); 1639 if (err) 1640 return err; 1641 1642 err = efa_com_register_mr(&dev->edev, ¶ms, &result); 1643 pbl_destroy(dev, &pbl); 1644 1645 if (err) 1646 return err; 1647 } 1648 1649 mr->ibmr.lkey = result.l_key; 1650 mr->ibmr.rkey = result.r_key; 1651 mr->ibmr.length = length; 1652 ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey); 1653 1654 return 0; 1655 } 1656 1657 struct ib_mr *efa_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start, 1658 u64 length, u64 virt_addr, 1659 int fd, int access_flags, 1660 struct ib_udata *udata) 1661 { 1662 struct efa_dev *dev = to_edev(ibpd->device); 1663 struct ib_umem_dmabuf *umem_dmabuf; 1664 struct efa_mr *mr; 1665 int err; 1666 1667 mr = efa_alloc_mr(ibpd, access_flags, udata); 1668 if (IS_ERR(mr)) { 1669 err = PTR_ERR(mr); 1670 goto err_out; 1671 } 1672 1673 umem_dmabuf = ib_umem_dmabuf_get_pinned(ibpd->device, start, length, fd, 1674 access_flags); 1675 if (IS_ERR(umem_dmabuf)) { 1676 err = PTR_ERR(umem_dmabuf); 1677 ibdev_dbg(&dev->ibdev, "Failed to get dmabuf umem[%d]\n", err); 1678 goto err_free; 1679 } 1680 1681 mr->umem = &umem_dmabuf->umem; 1682 err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags); 1683 if (err) 1684 goto err_release; 1685 1686 return &mr->ibmr; 1687 1688 err_release: 1689 ib_umem_release(mr->umem); 1690 err_free: 1691 kfree(mr); 1692 err_out: 1693 atomic64_inc(&dev->stats.reg_mr_err); 1694 return ERR_PTR(err); 1695 } 1696 1697 struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length, 1698 u64 virt_addr, int access_flags, 1699 struct ib_udata *udata) 1700 { 1701 struct efa_dev *dev = to_edev(ibpd->device); 1702 struct efa_mr *mr; 1703 int err; 1704 1705 mr = efa_alloc_mr(ibpd, access_flags, udata); 1706 if (IS_ERR(mr)) { 1707 err = PTR_ERR(mr); 1708 goto err_out; 1709 } 1710 1711 mr->umem = ib_umem_get(ibpd->device, start, length, access_flags); 1712 if (IS_ERR(mr->umem)) { 1713 err = PTR_ERR(mr->umem); 1714 ibdev_dbg(&dev->ibdev, 1715 "Failed to pin and map user space memory[%d]\n", err); 1716 goto err_free; 1717 } 1718 1719 err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags); 1720 if (err) 1721 goto err_release; 1722 1723 return &mr->ibmr; 1724 1725 err_release: 1726 ib_umem_release(mr->umem); 1727 err_free: 1728 kfree(mr); 1729 err_out: 1730 atomic64_inc(&dev->stats.reg_mr_err); 1731 return ERR_PTR(err); 1732 } 1733 1734 int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) 1735 { 1736 struct efa_dev *dev = to_edev(ibmr->device); 1737 struct efa_com_dereg_mr_params params; 1738 struct efa_mr *mr = to_emr(ibmr); 1739 int err; 1740 1741 ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey); 1742 1743 params.l_key = mr->ibmr.lkey; 1744 err = efa_com_dereg_mr(&dev->edev, ¶ms); 1745 if (err) 1746 return err; 1747 1748 ib_umem_release(mr->umem); 1749 kfree(mr); 1750 1751 return 0; 1752 } 1753 1754 int efa_get_port_immutable(struct ib_device *ibdev, u32 port_num, 1755 struct ib_port_immutable *immutable) 1756 { 1757 struct ib_port_attr attr; 1758 int err; 1759 1760 err = ib_query_port(ibdev, port_num, &attr); 1761 if (err) { 1762 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err); 1763 return err; 1764 } 1765 1766 immutable->pkey_tbl_len = attr.pkey_tbl_len; 1767 immutable->gid_tbl_len = attr.gid_tbl_len; 1768 1769 return 0; 1770 } 1771 1772 static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn) 1773 { 1774 struct efa_com_dealloc_uar_params params = { 1775 .uarn = uarn, 1776 }; 1777 1778 return efa_com_dealloc_uar(&dev->edev, ¶ms); 1779 } 1780 1781 #define EFA_CHECK_USER_COMP(_dev, _comp_mask, _attr, _mask, _attr_str) \ 1782 (_attr_str = (!(_dev)->dev_attr._attr || ((_comp_mask) & (_mask))) ? \ 1783 NULL : #_attr) 1784 1785 static int efa_user_comp_handshake(const struct ib_ucontext *ibucontext, 1786 const struct efa_ibv_alloc_ucontext_cmd *cmd) 1787 { 1788 struct efa_dev *dev = to_edev(ibucontext->device); 1789 char *attr_str; 1790 1791 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, max_tx_batch, 1792 EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH, attr_str)) 1793 goto err; 1794 1795 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, min_sq_depth, 1796 EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR, 1797 attr_str)) 1798 goto err; 1799 1800 return 0; 1801 1802 err: 1803 ibdev_dbg(&dev->ibdev, "Userspace handshake failed for %s attribute\n", 1804 attr_str); 1805 return -EOPNOTSUPP; 1806 } 1807 1808 int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata) 1809 { 1810 struct efa_ucontext *ucontext = to_eucontext(ibucontext); 1811 struct efa_dev *dev = to_edev(ibucontext->device); 1812 struct efa_ibv_alloc_ucontext_resp resp = {}; 1813 struct efa_ibv_alloc_ucontext_cmd cmd = {}; 1814 struct efa_com_alloc_uar_result result; 1815 int err; 1816 1817 /* 1818 * it's fine if the driver does not know all request fields, 1819 * we will ack input fields in our response. 1820 */ 1821 1822 err = ib_copy_from_udata(&cmd, udata, 1823 min(sizeof(cmd), udata->inlen)); 1824 if (err) { 1825 ibdev_dbg(&dev->ibdev, 1826 "Cannot copy udata for alloc_ucontext\n"); 1827 goto err_out; 1828 } 1829 1830 err = efa_user_comp_handshake(ibucontext, &cmd); 1831 if (err) 1832 goto err_out; 1833 1834 err = efa_com_alloc_uar(&dev->edev, &result); 1835 if (err) 1836 goto err_out; 1837 1838 ucontext->uarn = result.uarn; 1839 1840 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE; 1841 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH; 1842 resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq; 1843 resp.inline_buf_size = dev->dev_attr.inline_buf_size; 1844 resp.max_llq_size = dev->dev_attr.max_llq_size; 1845 resp.max_tx_batch = dev->dev_attr.max_tx_batch; 1846 resp.min_sq_wr = dev->dev_attr.min_sq_depth; 1847 1848 err = ib_copy_to_udata(udata, &resp, 1849 min(sizeof(resp), udata->outlen)); 1850 if (err) 1851 goto err_dealloc_uar; 1852 1853 return 0; 1854 1855 err_dealloc_uar: 1856 efa_dealloc_uar(dev, result.uarn); 1857 err_out: 1858 atomic64_inc(&dev->stats.alloc_ucontext_err); 1859 return err; 1860 } 1861 1862 void efa_dealloc_ucontext(struct ib_ucontext *ibucontext) 1863 { 1864 struct efa_ucontext *ucontext = to_eucontext(ibucontext); 1865 struct efa_dev *dev = to_edev(ibucontext->device); 1866 1867 efa_dealloc_uar(dev, ucontext->uarn); 1868 } 1869 1870 void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry) 1871 { 1872 struct efa_user_mmap_entry *entry = to_emmap(rdma_entry); 1873 1874 kfree(entry); 1875 } 1876 1877 static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext, 1878 struct vm_area_struct *vma) 1879 { 1880 struct rdma_user_mmap_entry *rdma_entry; 1881 struct efa_user_mmap_entry *entry; 1882 unsigned long va; 1883 int err = 0; 1884 u64 pfn; 1885 1886 rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma); 1887 if (!rdma_entry) { 1888 ibdev_dbg(&dev->ibdev, 1889 "pgoff[%#lx] does not have valid entry\n", 1890 vma->vm_pgoff); 1891 atomic64_inc(&dev->stats.mmap_err); 1892 return -EINVAL; 1893 } 1894 entry = to_emmap(rdma_entry); 1895 1896 ibdev_dbg(&dev->ibdev, 1897 "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n", 1898 entry->address, rdma_entry->npages * PAGE_SIZE, 1899 entry->mmap_flag); 1900 1901 pfn = entry->address >> PAGE_SHIFT; 1902 switch (entry->mmap_flag) { 1903 case EFA_MMAP_IO_NC: 1904 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, 1905 entry->rdma_entry.npages * PAGE_SIZE, 1906 pgprot_noncached(vma->vm_page_prot), 1907 rdma_entry); 1908 break; 1909 case EFA_MMAP_IO_WC: 1910 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, 1911 entry->rdma_entry.npages * PAGE_SIZE, 1912 pgprot_writecombine(vma->vm_page_prot), 1913 rdma_entry); 1914 break; 1915 case EFA_MMAP_DMA_PAGE: 1916 for (va = vma->vm_start; va < vma->vm_end; 1917 va += PAGE_SIZE, pfn++) { 1918 err = vm_insert_page(vma, va, pfn_to_page(pfn)); 1919 if (err) 1920 break; 1921 } 1922 break; 1923 default: 1924 err = -EINVAL; 1925 } 1926 1927 if (err) { 1928 ibdev_dbg( 1929 &dev->ibdev, 1930 "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n", 1931 entry->address, rdma_entry->npages * PAGE_SIZE, 1932 entry->mmap_flag, err); 1933 atomic64_inc(&dev->stats.mmap_err); 1934 } 1935 1936 rdma_user_mmap_entry_put(rdma_entry); 1937 return err; 1938 } 1939 1940 int efa_mmap(struct ib_ucontext *ibucontext, 1941 struct vm_area_struct *vma) 1942 { 1943 struct efa_ucontext *ucontext = to_eucontext(ibucontext); 1944 struct efa_dev *dev = to_edev(ibucontext->device); 1945 size_t length = vma->vm_end - vma->vm_start; 1946 1947 ibdev_dbg(&dev->ibdev, 1948 "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n", 1949 vma->vm_start, vma->vm_end, length, vma->vm_pgoff); 1950 1951 return __efa_mmap(dev, ucontext, vma); 1952 } 1953 1954 static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah) 1955 { 1956 struct efa_com_destroy_ah_params params = { 1957 .ah = ah->ah, 1958 .pdn = to_epd(ah->ibah.pd)->pdn, 1959 }; 1960 1961 return efa_com_destroy_ah(&dev->edev, ¶ms); 1962 } 1963 1964 int efa_create_ah(struct ib_ah *ibah, 1965 struct rdma_ah_init_attr *init_attr, 1966 struct ib_udata *udata) 1967 { 1968 struct rdma_ah_attr *ah_attr = init_attr->ah_attr; 1969 struct efa_dev *dev = to_edev(ibah->device); 1970 struct efa_com_create_ah_params params = {}; 1971 struct efa_ibv_create_ah_resp resp = {}; 1972 struct efa_com_create_ah_result result; 1973 struct efa_ah *ah = to_eah(ibah); 1974 int err; 1975 1976 if (!(init_attr->flags & RDMA_CREATE_AH_SLEEPABLE)) { 1977 ibdev_dbg(&dev->ibdev, 1978 "Create address handle is not supported in atomic context\n"); 1979 err = -EOPNOTSUPP; 1980 goto err_out; 1981 } 1982 1983 if (udata->inlen && 1984 !ib_is_udata_cleared(udata, 0, udata->inlen)) { 1985 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n"); 1986 err = -EINVAL; 1987 goto err_out; 1988 } 1989 1990 memcpy(params.dest_addr, ah_attr->grh.dgid.raw, 1991 sizeof(params.dest_addr)); 1992 params.pdn = to_epd(ibah->pd)->pdn; 1993 err = efa_com_create_ah(&dev->edev, ¶ms, &result); 1994 if (err) 1995 goto err_out; 1996 1997 memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id)); 1998 ah->ah = result.ah; 1999 2000 resp.efa_address_handle = result.ah; 2001 2002 if (udata->outlen) { 2003 err = ib_copy_to_udata(udata, &resp, 2004 min(sizeof(resp), udata->outlen)); 2005 if (err) { 2006 ibdev_dbg(&dev->ibdev, 2007 "Failed to copy udata for create_ah response\n"); 2008 goto err_destroy_ah; 2009 } 2010 } 2011 ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah); 2012 2013 return 0; 2014 2015 err_destroy_ah: 2016 efa_ah_destroy(dev, ah); 2017 err_out: 2018 atomic64_inc(&dev->stats.create_ah_err); 2019 return err; 2020 } 2021 2022 int efa_destroy_ah(struct ib_ah *ibah, u32 flags) 2023 { 2024 struct efa_dev *dev = to_edev(ibah->pd->device); 2025 struct efa_ah *ah = to_eah(ibah); 2026 2027 ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah); 2028 2029 if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) { 2030 ibdev_dbg(&dev->ibdev, 2031 "Destroy address handle is not supported in atomic context\n"); 2032 return -EOPNOTSUPP; 2033 } 2034 2035 efa_ah_destroy(dev, ah); 2036 return 0; 2037 } 2038 2039 struct rdma_hw_stats *efa_alloc_hw_port_stats(struct ib_device *ibdev, 2040 u32 port_num) 2041 { 2042 return rdma_alloc_hw_stats_struct(efa_port_stats_descs, 2043 ARRAY_SIZE(efa_port_stats_descs), 2044 RDMA_HW_STATS_DEFAULT_LIFESPAN); 2045 } 2046 2047 struct rdma_hw_stats *efa_alloc_hw_device_stats(struct ib_device *ibdev) 2048 { 2049 return rdma_alloc_hw_stats_struct(efa_device_stats_descs, 2050 ARRAY_SIZE(efa_device_stats_descs), 2051 RDMA_HW_STATS_DEFAULT_LIFESPAN); 2052 } 2053 2054 static int efa_fill_device_stats(struct efa_dev *dev, 2055 struct rdma_hw_stats *stats) 2056 { 2057 struct efa_com_stats_admin *as = &dev->edev.aq.stats; 2058 struct efa_stats *s = &dev->stats; 2059 2060 stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd); 2061 stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd); 2062 stats->value[EFA_CMDS_ERR] = atomic64_read(&as->cmd_err); 2063 stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion); 2064 2065 stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd); 2066 stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->alloc_pd_err); 2067 stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->create_qp_err); 2068 stats->value[EFA_CREATE_CQ_ERR] = atomic64_read(&s->create_cq_err); 2069 stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->reg_mr_err); 2070 stats->value[EFA_ALLOC_UCONTEXT_ERR] = 2071 atomic64_read(&s->alloc_ucontext_err); 2072 stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->create_ah_err); 2073 stats->value[EFA_MMAP_ERR] = atomic64_read(&s->mmap_err); 2074 2075 return ARRAY_SIZE(efa_device_stats_descs); 2076 } 2077 2078 static int efa_fill_port_stats(struct efa_dev *dev, struct rdma_hw_stats *stats, 2079 u32 port_num) 2080 { 2081 struct efa_com_get_stats_params params = {}; 2082 union efa_com_get_stats_result result; 2083 struct efa_com_rdma_read_stats *rrs; 2084 struct efa_com_messages_stats *ms; 2085 struct efa_com_basic_stats *bs; 2086 int err; 2087 2088 params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL; 2089 params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC; 2090 2091 err = efa_com_get_stats(&dev->edev, ¶ms, &result); 2092 if (err) 2093 return err; 2094 2095 bs = &result.basic_stats; 2096 stats->value[EFA_TX_BYTES] = bs->tx_bytes; 2097 stats->value[EFA_TX_PKTS] = bs->tx_pkts; 2098 stats->value[EFA_RX_BYTES] = bs->rx_bytes; 2099 stats->value[EFA_RX_PKTS] = bs->rx_pkts; 2100 stats->value[EFA_RX_DROPS] = bs->rx_drops; 2101 2102 params.type = EFA_ADMIN_GET_STATS_TYPE_MESSAGES; 2103 err = efa_com_get_stats(&dev->edev, ¶ms, &result); 2104 if (err) 2105 return err; 2106 2107 ms = &result.messages_stats; 2108 stats->value[EFA_SEND_BYTES] = ms->send_bytes; 2109 stats->value[EFA_SEND_WRS] = ms->send_wrs; 2110 stats->value[EFA_RECV_BYTES] = ms->recv_bytes; 2111 stats->value[EFA_RECV_WRS] = ms->recv_wrs; 2112 2113 params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_READ; 2114 err = efa_com_get_stats(&dev->edev, ¶ms, &result); 2115 if (err) 2116 return err; 2117 2118 rrs = &result.rdma_read_stats; 2119 stats->value[EFA_RDMA_READ_WRS] = rrs->read_wrs; 2120 stats->value[EFA_RDMA_READ_BYTES] = rrs->read_bytes; 2121 stats->value[EFA_RDMA_READ_WR_ERR] = rrs->read_wr_err; 2122 stats->value[EFA_RDMA_READ_RESP_BYTES] = rrs->read_resp_bytes; 2123 2124 return ARRAY_SIZE(efa_port_stats_descs); 2125 } 2126 2127 int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats, 2128 u32 port_num, int index) 2129 { 2130 if (port_num) 2131 return efa_fill_port_stats(to_edev(ibdev), stats, port_num); 2132 else 2133 return efa_fill_device_stats(to_edev(ibdev), stats); 2134 } 2135 2136 enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev, 2137 u32 port_num) 2138 { 2139 return IB_LINK_LAYER_UNSPECIFIED; 2140 } 2141 2142