1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* 3 * Copyright 2018-2021 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_DEVICE_STATS(op) \ 34 op(EFA_SUBMITTED_CMDS, "submitted_cmds") \ 35 op(EFA_COMPLETED_CMDS, "completed_cmds") \ 36 op(EFA_CMDS_ERR, "cmds_err") \ 37 op(EFA_NO_COMPLETION_CMDS, "no_completion_cmds") \ 38 op(EFA_KEEP_ALIVE_RCVD, "keep_alive_rcvd") \ 39 op(EFA_ALLOC_PD_ERR, "alloc_pd_err") \ 40 op(EFA_CREATE_QP_ERR, "create_qp_err") \ 41 op(EFA_CREATE_CQ_ERR, "create_cq_err") \ 42 op(EFA_REG_MR_ERR, "reg_mr_err") \ 43 op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \ 44 op(EFA_CREATE_AH_ERR, "create_ah_err") \ 45 op(EFA_MMAP_ERR, "mmap_err") 46 47 #define EFA_DEFINE_PORT_STATS(op) \ 48 op(EFA_TX_BYTES, "tx_bytes") \ 49 op(EFA_TX_PKTS, "tx_pkts") \ 50 op(EFA_RX_BYTES, "rx_bytes") \ 51 op(EFA_RX_PKTS, "rx_pkts") \ 52 op(EFA_RX_DROPS, "rx_drops") \ 53 op(EFA_SEND_BYTES, "send_bytes") \ 54 op(EFA_SEND_WRS, "send_wrs") \ 55 op(EFA_RECV_BYTES, "recv_bytes") \ 56 op(EFA_RECV_WRS, "recv_wrs") \ 57 op(EFA_RDMA_READ_WRS, "rdma_read_wrs") \ 58 op(EFA_RDMA_READ_BYTES, "rdma_read_bytes") \ 59 op(EFA_RDMA_READ_WR_ERR, "rdma_read_wr_err") \ 60 op(EFA_RDMA_READ_RESP_BYTES, "rdma_read_resp_bytes") \ 61 62 #define EFA_STATS_ENUM(ename, name) ename, 63 #define EFA_STATS_STR(ename, name) [ename] = name, 64 65 enum efa_hw_device_stats { 66 EFA_DEFINE_DEVICE_STATS(EFA_STATS_ENUM) 67 }; 68 69 static const char *const efa_device_stats_names[] = { 70 EFA_DEFINE_DEVICE_STATS(EFA_STATS_STR) 71 }; 72 73 enum efa_hw_port_stats { 74 EFA_DEFINE_PORT_STATS(EFA_STATS_ENUM) 75 }; 76 77 static const char *const efa_port_stats_names[] = { 78 EFA_DEFINE_PORT_STATS(EFA_STATS_STR) 79 }; 80 81 #define EFA_CHUNK_PAYLOAD_SHIFT 12 82 #define EFA_CHUNK_PAYLOAD_SIZE BIT(EFA_CHUNK_PAYLOAD_SHIFT) 83 #define EFA_CHUNK_PAYLOAD_PTR_SIZE 8 84 85 #define EFA_CHUNK_SHIFT 12 86 #define EFA_CHUNK_SIZE BIT(EFA_CHUNK_SHIFT) 87 #define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info) 88 89 #define EFA_PTRS_PER_CHUNK \ 90 ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE) 91 92 #define EFA_CHUNK_USED_SIZE \ 93 ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE) 94 95 struct pbl_chunk { 96 dma_addr_t dma_addr; 97 u64 *buf; 98 u32 length; 99 }; 100 101 struct pbl_chunk_list { 102 struct pbl_chunk *chunks; 103 unsigned int size; 104 }; 105 106 struct pbl_context { 107 union { 108 struct { 109 dma_addr_t dma_addr; 110 } continuous; 111 struct { 112 u32 pbl_buf_size_in_pages; 113 struct scatterlist *sgl; 114 int sg_dma_cnt; 115 struct pbl_chunk_list chunk_list; 116 } indirect; 117 } phys; 118 u64 *pbl_buf; 119 u32 pbl_buf_size_in_bytes; 120 u8 physically_continuous; 121 }; 122 123 static inline struct efa_dev *to_edev(struct ib_device *ibdev) 124 { 125 return container_of(ibdev, struct efa_dev, ibdev); 126 } 127 128 static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext) 129 { 130 return container_of(ibucontext, struct efa_ucontext, ibucontext); 131 } 132 133 static inline struct efa_pd *to_epd(struct ib_pd *ibpd) 134 { 135 return container_of(ibpd, struct efa_pd, ibpd); 136 } 137 138 static inline struct efa_mr *to_emr(struct ib_mr *ibmr) 139 { 140 return container_of(ibmr, struct efa_mr, ibmr); 141 } 142 143 static inline struct efa_qp *to_eqp(struct ib_qp *ibqp) 144 { 145 return container_of(ibqp, struct efa_qp, ibqp); 146 } 147 148 static inline struct efa_cq *to_ecq(struct ib_cq *ibcq) 149 { 150 return container_of(ibcq, struct efa_cq, ibcq); 151 } 152 153 static inline struct efa_ah *to_eah(struct ib_ah *ibah) 154 { 155 return container_of(ibah, struct efa_ah, ibah); 156 } 157 158 static inline struct efa_user_mmap_entry * 159 to_emmap(struct rdma_user_mmap_entry *rdma_entry) 160 { 161 return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry); 162 } 163 164 #define EFA_DEV_CAP(dev, cap) \ 165 ((dev)->dev_attr.device_caps & \ 166 EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_##cap##_MASK) 167 168 #define is_reserved_cleared(reserved) \ 169 !memchr_inv(reserved, 0, sizeof(reserved)) 170 171 static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr, 172 size_t size, enum dma_data_direction dir) 173 { 174 void *addr; 175 176 addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO); 177 if (!addr) 178 return NULL; 179 180 *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir); 181 if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) { 182 ibdev_err(&dev->ibdev, "Failed to map DMA address\n"); 183 free_pages_exact(addr, size); 184 return NULL; 185 } 186 187 return addr; 188 } 189 190 static void efa_free_mapped(struct efa_dev *dev, void *cpu_addr, 191 dma_addr_t dma_addr, 192 size_t size, enum dma_data_direction dir) 193 { 194 dma_unmap_single(&dev->pdev->dev, dma_addr, size, dir); 195 free_pages_exact(cpu_addr, size); 196 } 197 198 int efa_query_device(struct ib_device *ibdev, 199 struct ib_device_attr *props, 200 struct ib_udata *udata) 201 { 202 struct efa_com_get_device_attr_result *dev_attr; 203 struct efa_ibv_ex_query_device_resp resp = {}; 204 struct efa_dev *dev = to_edev(ibdev); 205 int err; 206 207 if (udata && udata->inlen && 208 !ib_is_udata_cleared(udata, 0, udata->inlen)) { 209 ibdev_dbg(ibdev, 210 "Incompatible ABI params, udata not cleared\n"); 211 return -EINVAL; 212 } 213 214 dev_attr = &dev->dev_attr; 215 216 memset(props, 0, sizeof(*props)); 217 props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE; 218 props->page_size_cap = dev_attr->page_size_cap; 219 props->vendor_id = dev->pdev->vendor; 220 props->vendor_part_id = dev->pdev->device; 221 props->hw_ver = dev->pdev->subsystem_device; 222 props->max_qp = dev_attr->max_qp; 223 props->max_cq = dev_attr->max_cq; 224 props->max_pd = dev_attr->max_pd; 225 props->max_mr = dev_attr->max_mr; 226 props->max_ah = dev_attr->max_ah; 227 props->max_cqe = dev_attr->max_cq_depth; 228 props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth, 229 dev_attr->max_rq_depth); 230 props->max_send_sge = dev_attr->max_sq_sge; 231 props->max_recv_sge = dev_attr->max_rq_sge; 232 props->max_sge_rd = dev_attr->max_wr_rdma_sge; 233 props->max_pkeys = 1; 234 235 if (udata && udata->outlen) { 236 resp.max_sq_sge = dev_attr->max_sq_sge; 237 resp.max_rq_sge = dev_attr->max_rq_sge; 238 resp.max_sq_wr = dev_attr->max_sq_depth; 239 resp.max_rq_wr = dev_attr->max_rq_depth; 240 resp.max_rdma_size = dev_attr->max_rdma_size; 241 242 if (EFA_DEV_CAP(dev, RDMA_READ)) 243 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ; 244 245 if (EFA_DEV_CAP(dev, RNR_RETRY)) 246 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY; 247 248 err = ib_copy_to_udata(udata, &resp, 249 min(sizeof(resp), udata->outlen)); 250 if (err) { 251 ibdev_dbg(ibdev, 252 "Failed to copy udata for query_device\n"); 253 return err; 254 } 255 } 256 257 return 0; 258 } 259 260 int efa_query_port(struct ib_device *ibdev, u32 port, 261 struct ib_port_attr *props) 262 { 263 struct efa_dev *dev = to_edev(ibdev); 264 265 props->lmc = 1; 266 267 props->state = IB_PORT_ACTIVE; 268 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP; 269 props->gid_tbl_len = 1; 270 props->pkey_tbl_len = 1; 271 props->active_speed = IB_SPEED_EDR; 272 props->active_width = IB_WIDTH_4X; 273 props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu); 274 props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu); 275 props->max_msg_sz = dev->dev_attr.mtu; 276 props->max_vl_num = 1; 277 278 return 0; 279 } 280 281 int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, 282 int qp_attr_mask, 283 struct ib_qp_init_attr *qp_init_attr) 284 { 285 struct efa_dev *dev = to_edev(ibqp->device); 286 struct efa_com_query_qp_params params = {}; 287 struct efa_com_query_qp_result result; 288 struct efa_qp *qp = to_eqp(ibqp); 289 int err; 290 291 #define EFA_QUERY_QP_SUPP_MASK \ 292 (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \ 293 IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP | IB_QP_RNR_RETRY) 294 295 if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) { 296 ibdev_dbg(&dev->ibdev, 297 "Unsupported qp_attr_mask[%#x] supported[%#x]\n", 298 qp_attr_mask, EFA_QUERY_QP_SUPP_MASK); 299 return -EOPNOTSUPP; 300 } 301 302 memset(qp_attr, 0, sizeof(*qp_attr)); 303 memset(qp_init_attr, 0, sizeof(*qp_init_attr)); 304 305 params.qp_handle = qp->qp_handle; 306 err = efa_com_query_qp(&dev->edev, ¶ms, &result); 307 if (err) 308 return err; 309 310 qp_attr->qp_state = result.qp_state; 311 qp_attr->qkey = result.qkey; 312 qp_attr->sq_psn = result.sq_psn; 313 qp_attr->sq_draining = result.sq_draining; 314 qp_attr->port_num = 1; 315 qp_attr->rnr_retry = result.rnr_retry; 316 317 qp_attr->cap.max_send_wr = qp->max_send_wr; 318 qp_attr->cap.max_recv_wr = qp->max_recv_wr; 319 qp_attr->cap.max_send_sge = qp->max_send_sge; 320 qp_attr->cap.max_recv_sge = qp->max_recv_sge; 321 qp_attr->cap.max_inline_data = qp->max_inline_data; 322 323 qp_init_attr->qp_type = ibqp->qp_type; 324 qp_init_attr->recv_cq = ibqp->recv_cq; 325 qp_init_attr->send_cq = ibqp->send_cq; 326 qp_init_attr->qp_context = ibqp->qp_context; 327 qp_init_attr->cap = qp_attr->cap; 328 329 return 0; 330 } 331 332 int efa_query_gid(struct ib_device *ibdev, u32 port, int index, 333 union ib_gid *gid) 334 { 335 struct efa_dev *dev = to_edev(ibdev); 336 337 memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr)); 338 339 return 0; 340 } 341 342 int efa_query_pkey(struct ib_device *ibdev, u32 port, u16 index, 343 u16 *pkey) 344 { 345 if (index > 0) 346 return -EINVAL; 347 348 *pkey = 0xffff; 349 return 0; 350 } 351 352 static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn) 353 { 354 struct efa_com_dealloc_pd_params params = { 355 .pdn = pdn, 356 }; 357 358 return efa_com_dealloc_pd(&dev->edev, ¶ms); 359 } 360 361 int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 362 { 363 struct efa_dev *dev = to_edev(ibpd->device); 364 struct efa_ibv_alloc_pd_resp resp = {}; 365 struct efa_com_alloc_pd_result result; 366 struct efa_pd *pd = to_epd(ibpd); 367 int err; 368 369 if (udata->inlen && 370 !ib_is_udata_cleared(udata, 0, udata->inlen)) { 371 ibdev_dbg(&dev->ibdev, 372 "Incompatible ABI params, udata not cleared\n"); 373 err = -EINVAL; 374 goto err_out; 375 } 376 377 err = efa_com_alloc_pd(&dev->edev, &result); 378 if (err) 379 goto err_out; 380 381 pd->pdn = result.pdn; 382 resp.pdn = result.pdn; 383 384 if (udata->outlen) { 385 err = ib_copy_to_udata(udata, &resp, 386 min(sizeof(resp), udata->outlen)); 387 if (err) { 388 ibdev_dbg(&dev->ibdev, 389 "Failed to copy udata for alloc_pd\n"); 390 goto err_dealloc_pd; 391 } 392 } 393 394 ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn); 395 396 return 0; 397 398 err_dealloc_pd: 399 efa_pd_dealloc(dev, result.pdn); 400 err_out: 401 atomic64_inc(&dev->stats.alloc_pd_err); 402 return err; 403 } 404 405 int efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) 406 { 407 struct efa_dev *dev = to_edev(ibpd->device); 408 struct efa_pd *pd = to_epd(ibpd); 409 410 ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn); 411 efa_pd_dealloc(dev, pd->pdn); 412 return 0; 413 } 414 415 static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle) 416 { 417 struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle }; 418 419 return efa_com_destroy_qp(&dev->edev, ¶ms); 420 } 421 422 static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp) 423 { 424 rdma_user_mmap_entry_remove(qp->rq_mmap_entry); 425 rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry); 426 rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry); 427 rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry); 428 } 429 430 int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) 431 { 432 struct efa_dev *dev = to_edev(ibqp->pd->device); 433 struct efa_qp *qp = to_eqp(ibqp); 434 int err; 435 436 ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num); 437 438 efa_qp_user_mmap_entries_remove(qp); 439 440 err = efa_destroy_qp_handle(dev, qp->qp_handle); 441 if (err) 442 return err; 443 444 if (qp->rq_cpu_addr) { 445 ibdev_dbg(&dev->ibdev, 446 "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n", 447 qp->rq_cpu_addr, qp->rq_size, 448 &qp->rq_dma_addr); 449 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr, 450 qp->rq_size, DMA_TO_DEVICE); 451 } 452 453 return 0; 454 } 455 456 static struct rdma_user_mmap_entry* 457 efa_user_mmap_entry_insert(struct ib_ucontext *ucontext, 458 u64 address, size_t length, 459 u8 mmap_flag, u64 *offset) 460 { 461 struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL); 462 int err; 463 464 if (!entry) 465 return NULL; 466 467 entry->address = address; 468 entry->mmap_flag = mmap_flag; 469 470 err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry, 471 length); 472 if (err) { 473 kfree(entry); 474 return NULL; 475 } 476 *offset = rdma_user_mmap_get_offset(&entry->rdma_entry); 477 478 return &entry->rdma_entry; 479 } 480 481 static int qp_mmap_entries_setup(struct efa_qp *qp, 482 struct efa_dev *dev, 483 struct efa_ucontext *ucontext, 484 struct efa_com_create_qp_params *params, 485 struct efa_ibv_create_qp_resp *resp) 486 { 487 size_t length; 488 u64 address; 489 490 address = dev->db_bar_addr + resp->sq_db_offset; 491 qp->sq_db_mmap_entry = 492 efa_user_mmap_entry_insert(&ucontext->ibucontext, 493 address, 494 PAGE_SIZE, EFA_MMAP_IO_NC, 495 &resp->sq_db_mmap_key); 496 if (!qp->sq_db_mmap_entry) 497 return -ENOMEM; 498 499 resp->sq_db_offset &= ~PAGE_MASK; 500 501 address = dev->mem_bar_addr + resp->llq_desc_offset; 502 length = PAGE_ALIGN(params->sq_ring_size_in_bytes + 503 (resp->llq_desc_offset & ~PAGE_MASK)); 504 505 qp->llq_desc_mmap_entry = 506 efa_user_mmap_entry_insert(&ucontext->ibucontext, 507 address, length, 508 EFA_MMAP_IO_WC, 509 &resp->llq_desc_mmap_key); 510 if (!qp->llq_desc_mmap_entry) 511 goto err_remove_mmap; 512 513 resp->llq_desc_offset &= ~PAGE_MASK; 514 515 if (qp->rq_size) { 516 address = dev->db_bar_addr + resp->rq_db_offset; 517 518 qp->rq_db_mmap_entry = 519 efa_user_mmap_entry_insert(&ucontext->ibucontext, 520 address, PAGE_SIZE, 521 EFA_MMAP_IO_NC, 522 &resp->rq_db_mmap_key); 523 if (!qp->rq_db_mmap_entry) 524 goto err_remove_mmap; 525 526 resp->rq_db_offset &= ~PAGE_MASK; 527 528 address = virt_to_phys(qp->rq_cpu_addr); 529 qp->rq_mmap_entry = 530 efa_user_mmap_entry_insert(&ucontext->ibucontext, 531 address, qp->rq_size, 532 EFA_MMAP_DMA_PAGE, 533 &resp->rq_mmap_key); 534 if (!qp->rq_mmap_entry) 535 goto err_remove_mmap; 536 537 resp->rq_mmap_size = qp->rq_size; 538 } 539 540 return 0; 541 542 err_remove_mmap: 543 efa_qp_user_mmap_entries_remove(qp); 544 545 return -ENOMEM; 546 } 547 548 static int efa_qp_validate_cap(struct efa_dev *dev, 549 struct ib_qp_init_attr *init_attr) 550 { 551 if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) { 552 ibdev_dbg(&dev->ibdev, 553 "qp: requested send wr[%u] exceeds the max[%u]\n", 554 init_attr->cap.max_send_wr, 555 dev->dev_attr.max_sq_depth); 556 return -EINVAL; 557 } 558 if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) { 559 ibdev_dbg(&dev->ibdev, 560 "qp: requested receive wr[%u] exceeds the max[%u]\n", 561 init_attr->cap.max_recv_wr, 562 dev->dev_attr.max_rq_depth); 563 return -EINVAL; 564 } 565 if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) { 566 ibdev_dbg(&dev->ibdev, 567 "qp: requested sge send[%u] exceeds the max[%u]\n", 568 init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge); 569 return -EINVAL; 570 } 571 if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) { 572 ibdev_dbg(&dev->ibdev, 573 "qp: requested sge recv[%u] exceeds the max[%u]\n", 574 init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge); 575 return -EINVAL; 576 } 577 if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) { 578 ibdev_dbg(&dev->ibdev, 579 "qp: requested inline data[%u] exceeds the max[%u]\n", 580 init_attr->cap.max_inline_data, 581 dev->dev_attr.inline_buf_size); 582 return -EINVAL; 583 } 584 585 return 0; 586 } 587 588 static int efa_qp_validate_attr(struct efa_dev *dev, 589 struct ib_qp_init_attr *init_attr) 590 { 591 if (init_attr->qp_type != IB_QPT_DRIVER && 592 init_attr->qp_type != IB_QPT_UD) { 593 ibdev_dbg(&dev->ibdev, 594 "Unsupported qp type %d\n", init_attr->qp_type); 595 return -EOPNOTSUPP; 596 } 597 598 if (init_attr->srq) { 599 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n"); 600 return -EOPNOTSUPP; 601 } 602 603 if (init_attr->create_flags) { 604 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n"); 605 return -EOPNOTSUPP; 606 } 607 608 return 0; 609 } 610 611 int efa_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr, 612 struct ib_udata *udata) 613 { 614 struct efa_com_create_qp_params create_qp_params = {}; 615 struct efa_com_create_qp_result create_qp_resp; 616 struct efa_dev *dev = to_edev(ibqp->device); 617 struct efa_ibv_create_qp_resp resp = {}; 618 struct efa_ibv_create_qp cmd = {}; 619 struct efa_qp *qp = to_eqp(ibqp); 620 struct efa_ucontext *ucontext; 621 int err; 622 623 ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext, 624 ibucontext); 625 626 err = efa_qp_validate_cap(dev, init_attr); 627 if (err) 628 goto err_out; 629 630 err = efa_qp_validate_attr(dev, init_attr); 631 if (err) 632 goto err_out; 633 634 if (offsetofend(typeof(cmd), driver_qp_type) > udata->inlen) { 635 ibdev_dbg(&dev->ibdev, 636 "Incompatible ABI params, no input udata\n"); 637 err = -EINVAL; 638 goto err_out; 639 } 640 641 if (udata->inlen > sizeof(cmd) && 642 !ib_is_udata_cleared(udata, sizeof(cmd), 643 udata->inlen - sizeof(cmd))) { 644 ibdev_dbg(&dev->ibdev, 645 "Incompatible ABI params, unknown fields in udata\n"); 646 err = -EINVAL; 647 goto err_out; 648 } 649 650 err = ib_copy_from_udata(&cmd, udata, 651 min(sizeof(cmd), udata->inlen)); 652 if (err) { 653 ibdev_dbg(&dev->ibdev, 654 "Cannot copy udata for create_qp\n"); 655 goto err_out; 656 } 657 658 if (cmd.comp_mask) { 659 ibdev_dbg(&dev->ibdev, 660 "Incompatible ABI params, unknown fields in udata\n"); 661 err = -EINVAL; 662 goto err_out; 663 } 664 665 create_qp_params.uarn = ucontext->uarn; 666 create_qp_params.pd = to_epd(ibqp->pd)->pdn; 667 668 if (init_attr->qp_type == IB_QPT_UD) { 669 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD; 670 } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) { 671 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD; 672 } else { 673 ibdev_dbg(&dev->ibdev, 674 "Unsupported qp type %d driver qp type %d\n", 675 init_attr->qp_type, cmd.driver_qp_type); 676 err = -EOPNOTSUPP; 677 goto err_out; 678 } 679 680 ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n", 681 init_attr->qp_type, cmd.driver_qp_type); 682 create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx; 683 create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx; 684 create_qp_params.sq_depth = init_attr->cap.max_send_wr; 685 create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size; 686 687 create_qp_params.rq_depth = init_attr->cap.max_recv_wr; 688 create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size; 689 qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes); 690 if (qp->rq_size) { 691 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr, 692 qp->rq_size, DMA_TO_DEVICE); 693 if (!qp->rq_cpu_addr) { 694 err = -ENOMEM; 695 goto err_out; 696 } 697 698 ibdev_dbg(&dev->ibdev, 699 "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n", 700 qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr); 701 create_qp_params.rq_base_addr = qp->rq_dma_addr; 702 } 703 704 err = efa_com_create_qp(&dev->edev, &create_qp_params, 705 &create_qp_resp); 706 if (err) 707 goto err_free_mapped; 708 709 resp.sq_db_offset = create_qp_resp.sq_db_offset; 710 resp.rq_db_offset = create_qp_resp.rq_db_offset; 711 resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset; 712 resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx; 713 resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx; 714 715 err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params, 716 &resp); 717 if (err) 718 goto err_destroy_qp; 719 720 qp->qp_handle = create_qp_resp.qp_handle; 721 qp->ibqp.qp_num = create_qp_resp.qp_num; 722 qp->max_send_wr = init_attr->cap.max_send_wr; 723 qp->max_recv_wr = init_attr->cap.max_recv_wr; 724 qp->max_send_sge = init_attr->cap.max_send_sge; 725 qp->max_recv_sge = init_attr->cap.max_recv_sge; 726 qp->max_inline_data = init_attr->cap.max_inline_data; 727 728 if (udata->outlen) { 729 err = ib_copy_to_udata(udata, &resp, 730 min(sizeof(resp), udata->outlen)); 731 if (err) { 732 ibdev_dbg(&dev->ibdev, 733 "Failed to copy udata for qp[%u]\n", 734 create_qp_resp.qp_num); 735 goto err_remove_mmap_entries; 736 } 737 } 738 739 ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num); 740 741 return 0; 742 743 err_remove_mmap_entries: 744 efa_qp_user_mmap_entries_remove(qp); 745 err_destroy_qp: 746 efa_destroy_qp_handle(dev, create_qp_resp.qp_handle); 747 err_free_mapped: 748 if (qp->rq_size) 749 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr, 750 qp->rq_size, DMA_TO_DEVICE); 751 err_out: 752 atomic64_inc(&dev->stats.create_qp_err); 753 return err; 754 } 755 756 static const struct { 757 int valid; 758 enum ib_qp_attr_mask req_param; 759 enum ib_qp_attr_mask opt_param; 760 } srd_qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = { 761 [IB_QPS_RESET] = { 762 [IB_QPS_RESET] = { .valid = 1 }, 763 [IB_QPS_INIT] = { 764 .valid = 1, 765 .req_param = IB_QP_PKEY_INDEX | 766 IB_QP_PORT | 767 IB_QP_QKEY, 768 }, 769 }, 770 [IB_QPS_INIT] = { 771 [IB_QPS_RESET] = { .valid = 1 }, 772 [IB_QPS_ERR] = { .valid = 1 }, 773 [IB_QPS_INIT] = { 774 .valid = 1, 775 .opt_param = IB_QP_PKEY_INDEX | 776 IB_QP_PORT | 777 IB_QP_QKEY, 778 }, 779 [IB_QPS_RTR] = { 780 .valid = 1, 781 .opt_param = IB_QP_PKEY_INDEX | 782 IB_QP_QKEY, 783 }, 784 }, 785 [IB_QPS_RTR] = { 786 [IB_QPS_RESET] = { .valid = 1 }, 787 [IB_QPS_ERR] = { .valid = 1 }, 788 [IB_QPS_RTS] = { 789 .valid = 1, 790 .req_param = IB_QP_SQ_PSN, 791 .opt_param = IB_QP_CUR_STATE | 792 IB_QP_QKEY | 793 IB_QP_RNR_RETRY, 794 795 } 796 }, 797 [IB_QPS_RTS] = { 798 [IB_QPS_RESET] = { .valid = 1 }, 799 [IB_QPS_ERR] = { .valid = 1 }, 800 [IB_QPS_RTS] = { 801 .valid = 1, 802 .opt_param = IB_QP_CUR_STATE | 803 IB_QP_QKEY, 804 }, 805 [IB_QPS_SQD] = { 806 .valid = 1, 807 .opt_param = IB_QP_EN_SQD_ASYNC_NOTIFY, 808 }, 809 }, 810 [IB_QPS_SQD] = { 811 [IB_QPS_RESET] = { .valid = 1 }, 812 [IB_QPS_ERR] = { .valid = 1 }, 813 [IB_QPS_RTS] = { 814 .valid = 1, 815 .opt_param = IB_QP_CUR_STATE | 816 IB_QP_QKEY, 817 }, 818 [IB_QPS_SQD] = { 819 .valid = 1, 820 .opt_param = IB_QP_PKEY_INDEX | 821 IB_QP_QKEY, 822 } 823 }, 824 [IB_QPS_SQE] = { 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 }, 833 [IB_QPS_ERR] = { 834 [IB_QPS_RESET] = { .valid = 1 }, 835 [IB_QPS_ERR] = { .valid = 1 }, 836 } 837 }; 838 839 static bool efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state, 840 enum ib_qp_state next_state, 841 enum ib_qp_attr_mask mask) 842 { 843 enum ib_qp_attr_mask req_param, opt_param; 844 845 if (mask & IB_QP_CUR_STATE && 846 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS && 847 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE) 848 return false; 849 850 if (!srd_qp_state_table[cur_state][next_state].valid) 851 return false; 852 853 req_param = srd_qp_state_table[cur_state][next_state].req_param; 854 opt_param = srd_qp_state_table[cur_state][next_state].opt_param; 855 856 if ((mask & req_param) != req_param) 857 return false; 858 859 if (mask & ~(req_param | opt_param | IB_QP_STATE)) 860 return false; 861 862 return true; 863 } 864 865 static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp, 866 struct ib_qp_attr *qp_attr, int qp_attr_mask, 867 enum ib_qp_state cur_state, 868 enum ib_qp_state new_state) 869 { 870 int err; 871 872 #define EFA_MODIFY_QP_SUPP_MASK \ 873 (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \ 874 IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN | \ 875 IB_QP_RNR_RETRY) 876 877 if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) { 878 ibdev_dbg(&dev->ibdev, 879 "Unsupported qp_attr_mask[%#x] supported[%#x]\n", 880 qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK); 881 return -EOPNOTSUPP; 882 } 883 884 if (qp->ibqp.qp_type == IB_QPT_DRIVER) 885 err = !efa_modify_srd_qp_is_ok(cur_state, new_state, 886 qp_attr_mask); 887 else 888 err = !ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD, 889 qp_attr_mask); 890 891 if (err) { 892 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n"); 893 return -EINVAL; 894 } 895 896 if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) { 897 ibdev_dbg(&dev->ibdev, "Can't change port num\n"); 898 return -EOPNOTSUPP; 899 } 900 901 if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) { 902 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n"); 903 return -EOPNOTSUPP; 904 } 905 906 return 0; 907 } 908 909 int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, 910 int qp_attr_mask, struct ib_udata *udata) 911 { 912 struct efa_dev *dev = to_edev(ibqp->device); 913 struct efa_com_modify_qp_params params = {}; 914 struct efa_qp *qp = to_eqp(ibqp); 915 enum ib_qp_state cur_state; 916 enum ib_qp_state new_state; 917 int err; 918 919 if (qp_attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 920 return -EOPNOTSUPP; 921 922 if (udata->inlen && 923 !ib_is_udata_cleared(udata, 0, udata->inlen)) { 924 ibdev_dbg(&dev->ibdev, 925 "Incompatible ABI params, udata not cleared\n"); 926 return -EINVAL; 927 } 928 929 cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state : 930 qp->state; 931 new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state; 932 933 err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state, 934 new_state); 935 if (err) 936 return err; 937 938 params.qp_handle = qp->qp_handle; 939 940 if (qp_attr_mask & IB_QP_STATE) { 941 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QP_STATE, 942 1); 943 EFA_SET(¶ms.modify_mask, 944 EFA_ADMIN_MODIFY_QP_CMD_CUR_QP_STATE, 1); 945 params.cur_qp_state = cur_state; 946 params.qp_state = new_state; 947 } 948 949 if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) { 950 EFA_SET(¶ms.modify_mask, 951 EFA_ADMIN_MODIFY_QP_CMD_SQ_DRAINED_ASYNC_NOTIFY, 1); 952 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify; 953 } 954 955 if (qp_attr_mask & IB_QP_QKEY) { 956 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QKEY, 1); 957 params.qkey = qp_attr->qkey; 958 } 959 960 if (qp_attr_mask & IB_QP_SQ_PSN) { 961 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_SQ_PSN, 1); 962 params.sq_psn = qp_attr->sq_psn; 963 } 964 965 if (qp_attr_mask & IB_QP_RNR_RETRY) { 966 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY, 967 1); 968 params.rnr_retry = qp_attr->rnr_retry; 969 } 970 971 err = efa_com_modify_qp(&dev->edev, ¶ms); 972 if (err) 973 return err; 974 975 qp->state = new_state; 976 977 return 0; 978 } 979 980 static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx) 981 { 982 struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx }; 983 984 return efa_com_destroy_cq(&dev->edev, ¶ms); 985 } 986 987 int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata) 988 { 989 struct efa_dev *dev = to_edev(ibcq->device); 990 struct efa_cq *cq = to_ecq(ibcq); 991 992 ibdev_dbg(&dev->ibdev, 993 "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n", 994 cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr); 995 996 rdma_user_mmap_entry_remove(cq->mmap_entry); 997 efa_destroy_cq_idx(dev, cq->cq_idx); 998 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size, 999 DMA_FROM_DEVICE); 1000 return 0; 1001 } 1002 1003 static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq, 1004 struct efa_ibv_create_cq_resp *resp) 1005 { 1006 resp->q_mmap_size = cq->size; 1007 cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext, 1008 virt_to_phys(cq->cpu_addr), 1009 cq->size, EFA_MMAP_DMA_PAGE, 1010 &resp->q_mmap_key); 1011 if (!cq->mmap_entry) 1012 return -ENOMEM; 1013 1014 return 0; 1015 } 1016 1017 int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, 1018 struct ib_udata *udata) 1019 { 1020 struct efa_ucontext *ucontext = rdma_udata_to_drv_context( 1021 udata, struct efa_ucontext, ibucontext); 1022 struct efa_ibv_create_cq_resp resp = {}; 1023 struct efa_com_create_cq_params params; 1024 struct efa_com_create_cq_result result; 1025 struct ib_device *ibdev = ibcq->device; 1026 struct efa_dev *dev = to_edev(ibdev); 1027 struct efa_ibv_create_cq cmd = {}; 1028 struct efa_cq *cq = to_ecq(ibcq); 1029 int entries = attr->cqe; 1030 int err; 1031 1032 ibdev_dbg(ibdev, "create_cq entries %d\n", entries); 1033 1034 if (attr->flags) 1035 return -EOPNOTSUPP; 1036 1037 if (entries < 1 || entries > dev->dev_attr.max_cq_depth) { 1038 ibdev_dbg(ibdev, 1039 "cq: requested entries[%u] non-positive or greater than max[%u]\n", 1040 entries, dev->dev_attr.max_cq_depth); 1041 err = -EINVAL; 1042 goto err_out; 1043 } 1044 1045 if (offsetofend(typeof(cmd), num_sub_cqs) > udata->inlen) { 1046 ibdev_dbg(ibdev, 1047 "Incompatible ABI params, no input udata\n"); 1048 err = -EINVAL; 1049 goto err_out; 1050 } 1051 1052 if (udata->inlen > sizeof(cmd) && 1053 !ib_is_udata_cleared(udata, sizeof(cmd), 1054 udata->inlen - sizeof(cmd))) { 1055 ibdev_dbg(ibdev, 1056 "Incompatible ABI params, unknown fields in udata\n"); 1057 err = -EINVAL; 1058 goto err_out; 1059 } 1060 1061 err = ib_copy_from_udata(&cmd, udata, 1062 min(sizeof(cmd), udata->inlen)); 1063 if (err) { 1064 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n"); 1065 goto err_out; 1066 } 1067 1068 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_50)) { 1069 ibdev_dbg(ibdev, 1070 "Incompatible ABI params, unknown fields in udata\n"); 1071 err = -EINVAL; 1072 goto err_out; 1073 } 1074 1075 if (!cmd.cq_entry_size) { 1076 ibdev_dbg(ibdev, 1077 "Invalid entry size [%u]\n", cmd.cq_entry_size); 1078 err = -EINVAL; 1079 goto err_out; 1080 } 1081 1082 if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) { 1083 ibdev_dbg(ibdev, 1084 "Invalid number of sub cqs[%u] expected[%u]\n", 1085 cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq); 1086 err = -EINVAL; 1087 goto err_out; 1088 } 1089 1090 cq->ucontext = ucontext; 1091 cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs); 1092 cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size, 1093 DMA_FROM_DEVICE); 1094 if (!cq->cpu_addr) { 1095 err = -ENOMEM; 1096 goto err_out; 1097 } 1098 1099 params.uarn = cq->ucontext->uarn; 1100 params.cq_depth = entries; 1101 params.dma_addr = cq->dma_addr; 1102 params.entry_size_in_bytes = cmd.cq_entry_size; 1103 params.num_sub_cqs = cmd.num_sub_cqs; 1104 err = efa_com_create_cq(&dev->edev, ¶ms, &result); 1105 if (err) 1106 goto err_free_mapped; 1107 1108 resp.cq_idx = result.cq_idx; 1109 cq->cq_idx = result.cq_idx; 1110 cq->ibcq.cqe = result.actual_depth; 1111 WARN_ON_ONCE(entries != result.actual_depth); 1112 1113 err = cq_mmap_entries_setup(dev, cq, &resp); 1114 if (err) { 1115 ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n", 1116 cq->cq_idx); 1117 goto err_destroy_cq; 1118 } 1119 1120 if (udata->outlen) { 1121 err = ib_copy_to_udata(udata, &resp, 1122 min(sizeof(resp), udata->outlen)); 1123 if (err) { 1124 ibdev_dbg(ibdev, 1125 "Failed to copy udata for create_cq\n"); 1126 goto err_remove_mmap; 1127 } 1128 } 1129 1130 ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n", 1131 cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr); 1132 1133 return 0; 1134 1135 err_remove_mmap: 1136 rdma_user_mmap_entry_remove(cq->mmap_entry); 1137 err_destroy_cq: 1138 efa_destroy_cq_idx(dev, cq->cq_idx); 1139 err_free_mapped: 1140 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size, 1141 DMA_FROM_DEVICE); 1142 1143 err_out: 1144 atomic64_inc(&dev->stats.create_cq_err); 1145 return err; 1146 } 1147 1148 static int umem_to_page_list(struct efa_dev *dev, 1149 struct ib_umem *umem, 1150 u64 *page_list, 1151 u32 hp_cnt, 1152 u8 hp_shift) 1153 { 1154 u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT); 1155 struct ib_block_iter biter; 1156 unsigned int hp_idx = 0; 1157 1158 ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n", 1159 hp_cnt, pages_in_hp); 1160 1161 rdma_umem_for_each_dma_block(umem, &biter, BIT(hp_shift)) 1162 page_list[hp_idx++] = rdma_block_iter_dma_address(&biter); 1163 1164 return 0; 1165 } 1166 1167 static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt) 1168 { 1169 struct scatterlist *sglist; 1170 struct page *pg; 1171 int i; 1172 1173 sglist = kmalloc_array(page_cnt, sizeof(*sglist), GFP_KERNEL); 1174 if (!sglist) 1175 return NULL; 1176 sg_init_table(sglist, page_cnt); 1177 for (i = 0; i < page_cnt; i++) { 1178 pg = vmalloc_to_page(buf); 1179 if (!pg) 1180 goto err; 1181 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0); 1182 buf += PAGE_SIZE / sizeof(*buf); 1183 } 1184 return sglist; 1185 1186 err: 1187 kfree(sglist); 1188 return NULL; 1189 } 1190 1191 /* 1192 * create a chunk list of physical pages dma addresses from the supplied 1193 * scatter gather list 1194 */ 1195 static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl) 1196 { 1197 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list; 1198 int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages; 1199 struct scatterlist *pages_sgl = pbl->phys.indirect.sgl; 1200 unsigned int chunk_list_size, chunk_idx, payload_idx; 1201 int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt; 1202 struct efa_com_ctrl_buff_info *ctrl_buf; 1203 u64 *cur_chunk_buf, *prev_chunk_buf; 1204 struct ib_block_iter biter; 1205 dma_addr_t dma_addr; 1206 int i; 1207 1208 /* allocate a chunk list that consists of 4KB chunks */ 1209 chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK); 1210 1211 chunk_list->size = chunk_list_size; 1212 chunk_list->chunks = kcalloc(chunk_list_size, 1213 sizeof(*chunk_list->chunks), 1214 GFP_KERNEL); 1215 if (!chunk_list->chunks) 1216 return -ENOMEM; 1217 1218 ibdev_dbg(&dev->ibdev, 1219 "chunk_list_size[%u] - pages[%u]\n", chunk_list_size, 1220 page_cnt); 1221 1222 /* allocate chunk buffers: */ 1223 for (i = 0; i < chunk_list_size; i++) { 1224 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL); 1225 if (!chunk_list->chunks[i].buf) 1226 goto chunk_list_dealloc; 1227 1228 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE; 1229 } 1230 chunk_list->chunks[chunk_list_size - 1].length = 1231 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) + 1232 EFA_CHUNK_PTR_SIZE; 1233 1234 /* fill the dma addresses of sg list pages to chunks: */ 1235 chunk_idx = 0; 1236 payload_idx = 0; 1237 cur_chunk_buf = chunk_list->chunks[0].buf; 1238 rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt, 1239 EFA_CHUNK_PAYLOAD_SIZE) { 1240 cur_chunk_buf[payload_idx++] = 1241 rdma_block_iter_dma_address(&biter); 1242 1243 if (payload_idx == EFA_PTRS_PER_CHUNK) { 1244 chunk_idx++; 1245 cur_chunk_buf = chunk_list->chunks[chunk_idx].buf; 1246 payload_idx = 0; 1247 } 1248 } 1249 1250 /* map chunks to dma and fill chunks next ptrs */ 1251 for (i = chunk_list_size - 1; i >= 0; i--) { 1252 dma_addr = dma_map_single(&dev->pdev->dev, 1253 chunk_list->chunks[i].buf, 1254 chunk_list->chunks[i].length, 1255 DMA_TO_DEVICE); 1256 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) { 1257 ibdev_err(&dev->ibdev, 1258 "chunk[%u] dma_map_failed\n", i); 1259 goto chunk_list_unmap; 1260 } 1261 1262 chunk_list->chunks[i].dma_addr = dma_addr; 1263 ibdev_dbg(&dev->ibdev, 1264 "chunk[%u] mapped at [%pad]\n", i, &dma_addr); 1265 1266 if (!i) 1267 break; 1268 1269 prev_chunk_buf = chunk_list->chunks[i - 1].buf; 1270 1271 ctrl_buf = (struct efa_com_ctrl_buff_info *) 1272 &prev_chunk_buf[EFA_PTRS_PER_CHUNK]; 1273 ctrl_buf->length = chunk_list->chunks[i].length; 1274 1275 efa_com_set_dma_addr(dma_addr, 1276 &ctrl_buf->address.mem_addr_high, 1277 &ctrl_buf->address.mem_addr_low); 1278 } 1279 1280 return 0; 1281 1282 chunk_list_unmap: 1283 for (; i < chunk_list_size; i++) { 1284 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr, 1285 chunk_list->chunks[i].length, DMA_TO_DEVICE); 1286 } 1287 chunk_list_dealloc: 1288 for (i = 0; i < chunk_list_size; i++) 1289 kfree(chunk_list->chunks[i].buf); 1290 1291 kfree(chunk_list->chunks); 1292 return -ENOMEM; 1293 } 1294 1295 static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl) 1296 { 1297 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list; 1298 int i; 1299 1300 for (i = 0; i < chunk_list->size; i++) { 1301 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr, 1302 chunk_list->chunks[i].length, DMA_TO_DEVICE); 1303 kfree(chunk_list->chunks[i].buf); 1304 } 1305 1306 kfree(chunk_list->chunks); 1307 } 1308 1309 /* initialize pbl continuous mode: map pbl buffer to a dma address. */ 1310 static int pbl_continuous_initialize(struct efa_dev *dev, 1311 struct pbl_context *pbl) 1312 { 1313 dma_addr_t dma_addr; 1314 1315 dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf, 1316 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE); 1317 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) { 1318 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n"); 1319 return -ENOMEM; 1320 } 1321 1322 pbl->phys.continuous.dma_addr = dma_addr; 1323 ibdev_dbg(&dev->ibdev, 1324 "pbl continuous - dma_addr = %pad, size[%u]\n", 1325 &dma_addr, pbl->pbl_buf_size_in_bytes); 1326 1327 return 0; 1328 } 1329 1330 /* 1331 * initialize pbl indirect mode: 1332 * create a chunk list out of the dma addresses of the physical pages of 1333 * pbl buffer. 1334 */ 1335 static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl) 1336 { 1337 u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, PAGE_SIZE); 1338 struct scatterlist *sgl; 1339 int sg_dma_cnt, err; 1340 1341 BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE); 1342 sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages); 1343 if (!sgl) 1344 return -ENOMEM; 1345 1346 sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE); 1347 if (!sg_dma_cnt) { 1348 err = -EINVAL; 1349 goto err_map; 1350 } 1351 1352 pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages; 1353 pbl->phys.indirect.sgl = sgl; 1354 pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt; 1355 err = pbl_chunk_list_create(dev, pbl); 1356 if (err) { 1357 ibdev_dbg(&dev->ibdev, 1358 "chunk_list creation failed[%d]\n", err); 1359 goto err_chunk; 1360 } 1361 1362 ibdev_dbg(&dev->ibdev, 1363 "pbl indirect - size[%u], chunks[%u]\n", 1364 pbl->pbl_buf_size_in_bytes, 1365 pbl->phys.indirect.chunk_list.size); 1366 1367 return 0; 1368 1369 err_chunk: 1370 dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE); 1371 err_map: 1372 kfree(sgl); 1373 return err; 1374 } 1375 1376 static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl) 1377 { 1378 pbl_chunk_list_destroy(dev, pbl); 1379 dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl, 1380 pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE); 1381 kfree(pbl->phys.indirect.sgl); 1382 } 1383 1384 /* create a page buffer list from a mapped user memory region */ 1385 static int pbl_create(struct efa_dev *dev, 1386 struct pbl_context *pbl, 1387 struct ib_umem *umem, 1388 int hp_cnt, 1389 u8 hp_shift) 1390 { 1391 int err; 1392 1393 pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE; 1394 pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL); 1395 if (!pbl->pbl_buf) 1396 return -ENOMEM; 1397 1398 if (is_vmalloc_addr(pbl->pbl_buf)) { 1399 pbl->physically_continuous = 0; 1400 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt, 1401 hp_shift); 1402 if (err) 1403 goto err_free; 1404 1405 err = pbl_indirect_initialize(dev, pbl); 1406 if (err) 1407 goto err_free; 1408 } else { 1409 pbl->physically_continuous = 1; 1410 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt, 1411 hp_shift); 1412 if (err) 1413 goto err_free; 1414 1415 err = pbl_continuous_initialize(dev, pbl); 1416 if (err) 1417 goto err_free; 1418 } 1419 1420 ibdev_dbg(&dev->ibdev, 1421 "user_pbl_created: user_pages[%u], continuous[%u]\n", 1422 hp_cnt, pbl->physically_continuous); 1423 1424 return 0; 1425 1426 err_free: 1427 kvfree(pbl->pbl_buf); 1428 return err; 1429 } 1430 1431 static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl) 1432 { 1433 if (pbl->physically_continuous) 1434 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr, 1435 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE); 1436 else 1437 pbl_indirect_terminate(dev, pbl); 1438 1439 kvfree(pbl->pbl_buf); 1440 } 1441 1442 static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr, 1443 struct efa_com_reg_mr_params *params) 1444 { 1445 int err; 1446 1447 params->inline_pbl = 1; 1448 err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array, 1449 params->page_num, params->page_shift); 1450 if (err) 1451 return err; 1452 1453 ibdev_dbg(&dev->ibdev, 1454 "inline_pbl_array - pages[%u]\n", params->page_num); 1455 1456 return 0; 1457 } 1458 1459 static int efa_create_pbl(struct efa_dev *dev, 1460 struct pbl_context *pbl, 1461 struct efa_mr *mr, 1462 struct efa_com_reg_mr_params *params) 1463 { 1464 int err; 1465 1466 err = pbl_create(dev, pbl, mr->umem, params->page_num, 1467 params->page_shift); 1468 if (err) { 1469 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err); 1470 return err; 1471 } 1472 1473 params->inline_pbl = 0; 1474 params->indirect = !pbl->physically_continuous; 1475 if (pbl->physically_continuous) { 1476 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes; 1477 1478 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr, 1479 ¶ms->pbl.pbl.address.mem_addr_high, 1480 ¶ms->pbl.pbl.address.mem_addr_low); 1481 } else { 1482 params->pbl.pbl.length = 1483 pbl->phys.indirect.chunk_list.chunks[0].length; 1484 1485 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr, 1486 ¶ms->pbl.pbl.address.mem_addr_high, 1487 ¶ms->pbl.pbl.address.mem_addr_low); 1488 } 1489 1490 return 0; 1491 } 1492 1493 struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length, 1494 u64 virt_addr, int access_flags, 1495 struct ib_udata *udata) 1496 { 1497 struct efa_dev *dev = to_edev(ibpd->device); 1498 struct efa_com_reg_mr_params params = {}; 1499 struct efa_com_reg_mr_result result = {}; 1500 struct pbl_context pbl; 1501 int supp_access_flags; 1502 unsigned int pg_sz; 1503 struct efa_mr *mr; 1504 int inline_size; 1505 int err; 1506 1507 if (udata && udata->inlen && 1508 !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) { 1509 ibdev_dbg(&dev->ibdev, 1510 "Incompatible ABI params, udata not cleared\n"); 1511 err = -EINVAL; 1512 goto err_out; 1513 } 1514 1515 supp_access_flags = 1516 IB_ACCESS_LOCAL_WRITE | 1517 (EFA_DEV_CAP(dev, RDMA_READ) ? IB_ACCESS_REMOTE_READ : 0); 1518 1519 access_flags &= ~IB_ACCESS_OPTIONAL; 1520 if (access_flags & ~supp_access_flags) { 1521 ibdev_dbg(&dev->ibdev, 1522 "Unsupported access flags[%#x], supported[%#x]\n", 1523 access_flags, supp_access_flags); 1524 err = -EOPNOTSUPP; 1525 goto err_out; 1526 } 1527 1528 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 1529 if (!mr) { 1530 err = -ENOMEM; 1531 goto err_out; 1532 } 1533 1534 mr->umem = ib_umem_get(ibpd->device, start, length, access_flags); 1535 if (IS_ERR(mr->umem)) { 1536 err = PTR_ERR(mr->umem); 1537 ibdev_dbg(&dev->ibdev, 1538 "Failed to pin and map user space memory[%d]\n", err); 1539 goto err_free; 1540 } 1541 1542 params.pd = to_epd(ibpd)->pdn; 1543 params.iova = virt_addr; 1544 params.mr_length_in_bytes = length; 1545 params.permissions = access_flags; 1546 1547 pg_sz = ib_umem_find_best_pgsz(mr->umem, 1548 dev->dev_attr.page_size_cap, 1549 virt_addr); 1550 if (!pg_sz) { 1551 err = -EOPNOTSUPP; 1552 ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n", 1553 dev->dev_attr.page_size_cap); 1554 goto err_unmap; 1555 } 1556 1557 params.page_shift = order_base_2(pg_sz); 1558 params.page_num = ib_umem_num_dma_blocks(mr->umem, pg_sz); 1559 1560 ibdev_dbg(&dev->ibdev, 1561 "start %#llx length %#llx params.page_shift %u params.page_num %u\n", 1562 start, length, params.page_shift, params.page_num); 1563 1564 inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array); 1565 if (params.page_num <= inline_size) { 1566 err = efa_create_inline_pbl(dev, mr, ¶ms); 1567 if (err) 1568 goto err_unmap; 1569 1570 err = efa_com_register_mr(&dev->edev, ¶ms, &result); 1571 if (err) 1572 goto err_unmap; 1573 } else { 1574 err = efa_create_pbl(dev, &pbl, mr, ¶ms); 1575 if (err) 1576 goto err_unmap; 1577 1578 err = efa_com_register_mr(&dev->edev, ¶ms, &result); 1579 pbl_destroy(dev, &pbl); 1580 1581 if (err) 1582 goto err_unmap; 1583 } 1584 1585 mr->ibmr.lkey = result.l_key; 1586 mr->ibmr.rkey = result.r_key; 1587 mr->ibmr.length = length; 1588 ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey); 1589 1590 return &mr->ibmr; 1591 1592 err_unmap: 1593 ib_umem_release(mr->umem); 1594 err_free: 1595 kfree(mr); 1596 err_out: 1597 atomic64_inc(&dev->stats.reg_mr_err); 1598 return ERR_PTR(err); 1599 } 1600 1601 int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) 1602 { 1603 struct efa_dev *dev = to_edev(ibmr->device); 1604 struct efa_com_dereg_mr_params params; 1605 struct efa_mr *mr = to_emr(ibmr); 1606 int err; 1607 1608 ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey); 1609 1610 params.l_key = mr->ibmr.lkey; 1611 err = efa_com_dereg_mr(&dev->edev, ¶ms); 1612 if (err) 1613 return err; 1614 1615 ib_umem_release(mr->umem); 1616 kfree(mr); 1617 1618 return 0; 1619 } 1620 1621 int efa_get_port_immutable(struct ib_device *ibdev, u32 port_num, 1622 struct ib_port_immutable *immutable) 1623 { 1624 struct ib_port_attr attr; 1625 int err; 1626 1627 err = ib_query_port(ibdev, port_num, &attr); 1628 if (err) { 1629 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err); 1630 return err; 1631 } 1632 1633 immutable->pkey_tbl_len = attr.pkey_tbl_len; 1634 immutable->gid_tbl_len = attr.gid_tbl_len; 1635 1636 return 0; 1637 } 1638 1639 static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn) 1640 { 1641 struct efa_com_dealloc_uar_params params = { 1642 .uarn = uarn, 1643 }; 1644 1645 return efa_com_dealloc_uar(&dev->edev, ¶ms); 1646 } 1647 1648 #define EFA_CHECK_USER_COMP(_dev, _comp_mask, _attr, _mask, _attr_str) \ 1649 (_attr_str = (!(_dev)->dev_attr._attr || ((_comp_mask) & (_mask))) ? \ 1650 NULL : #_attr) 1651 1652 static int efa_user_comp_handshake(const struct ib_ucontext *ibucontext, 1653 const struct efa_ibv_alloc_ucontext_cmd *cmd) 1654 { 1655 struct efa_dev *dev = to_edev(ibucontext->device); 1656 char *attr_str; 1657 1658 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, max_tx_batch, 1659 EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH, attr_str)) 1660 goto err; 1661 1662 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, min_sq_depth, 1663 EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR, 1664 attr_str)) 1665 goto err; 1666 1667 return 0; 1668 1669 err: 1670 ibdev_dbg(&dev->ibdev, "Userspace handshake failed for %s attribute\n", 1671 attr_str); 1672 return -EOPNOTSUPP; 1673 } 1674 1675 int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata) 1676 { 1677 struct efa_ucontext *ucontext = to_eucontext(ibucontext); 1678 struct efa_dev *dev = to_edev(ibucontext->device); 1679 struct efa_ibv_alloc_ucontext_resp resp = {}; 1680 struct efa_ibv_alloc_ucontext_cmd cmd = {}; 1681 struct efa_com_alloc_uar_result result; 1682 int err; 1683 1684 /* 1685 * it's fine if the driver does not know all request fields, 1686 * we will ack input fields in our response. 1687 */ 1688 1689 err = ib_copy_from_udata(&cmd, udata, 1690 min(sizeof(cmd), udata->inlen)); 1691 if (err) { 1692 ibdev_dbg(&dev->ibdev, 1693 "Cannot copy udata for alloc_ucontext\n"); 1694 goto err_out; 1695 } 1696 1697 err = efa_user_comp_handshake(ibucontext, &cmd); 1698 if (err) 1699 goto err_out; 1700 1701 err = efa_com_alloc_uar(&dev->edev, &result); 1702 if (err) 1703 goto err_out; 1704 1705 ucontext->uarn = result.uarn; 1706 1707 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE; 1708 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH; 1709 resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq; 1710 resp.inline_buf_size = dev->dev_attr.inline_buf_size; 1711 resp.max_llq_size = dev->dev_attr.max_llq_size; 1712 resp.max_tx_batch = dev->dev_attr.max_tx_batch; 1713 resp.min_sq_wr = dev->dev_attr.min_sq_depth; 1714 1715 err = ib_copy_to_udata(udata, &resp, 1716 min(sizeof(resp), udata->outlen)); 1717 if (err) 1718 goto err_dealloc_uar; 1719 1720 return 0; 1721 1722 err_dealloc_uar: 1723 efa_dealloc_uar(dev, result.uarn); 1724 err_out: 1725 atomic64_inc(&dev->stats.alloc_ucontext_err); 1726 return err; 1727 } 1728 1729 void efa_dealloc_ucontext(struct ib_ucontext *ibucontext) 1730 { 1731 struct efa_ucontext *ucontext = to_eucontext(ibucontext); 1732 struct efa_dev *dev = to_edev(ibucontext->device); 1733 1734 efa_dealloc_uar(dev, ucontext->uarn); 1735 } 1736 1737 void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry) 1738 { 1739 struct efa_user_mmap_entry *entry = to_emmap(rdma_entry); 1740 1741 kfree(entry); 1742 } 1743 1744 static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext, 1745 struct vm_area_struct *vma) 1746 { 1747 struct rdma_user_mmap_entry *rdma_entry; 1748 struct efa_user_mmap_entry *entry; 1749 unsigned long va; 1750 int err = 0; 1751 u64 pfn; 1752 1753 rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma); 1754 if (!rdma_entry) { 1755 ibdev_dbg(&dev->ibdev, 1756 "pgoff[%#lx] does not have valid entry\n", 1757 vma->vm_pgoff); 1758 atomic64_inc(&dev->stats.mmap_err); 1759 return -EINVAL; 1760 } 1761 entry = to_emmap(rdma_entry); 1762 1763 ibdev_dbg(&dev->ibdev, 1764 "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n", 1765 entry->address, rdma_entry->npages * PAGE_SIZE, 1766 entry->mmap_flag); 1767 1768 pfn = entry->address >> PAGE_SHIFT; 1769 switch (entry->mmap_flag) { 1770 case EFA_MMAP_IO_NC: 1771 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, 1772 entry->rdma_entry.npages * PAGE_SIZE, 1773 pgprot_noncached(vma->vm_page_prot), 1774 rdma_entry); 1775 break; 1776 case EFA_MMAP_IO_WC: 1777 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, 1778 entry->rdma_entry.npages * PAGE_SIZE, 1779 pgprot_writecombine(vma->vm_page_prot), 1780 rdma_entry); 1781 break; 1782 case EFA_MMAP_DMA_PAGE: 1783 for (va = vma->vm_start; va < vma->vm_end; 1784 va += PAGE_SIZE, pfn++) { 1785 err = vm_insert_page(vma, va, pfn_to_page(pfn)); 1786 if (err) 1787 break; 1788 } 1789 break; 1790 default: 1791 err = -EINVAL; 1792 } 1793 1794 if (err) { 1795 ibdev_dbg( 1796 &dev->ibdev, 1797 "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n", 1798 entry->address, rdma_entry->npages * PAGE_SIZE, 1799 entry->mmap_flag, err); 1800 atomic64_inc(&dev->stats.mmap_err); 1801 } 1802 1803 rdma_user_mmap_entry_put(rdma_entry); 1804 return err; 1805 } 1806 1807 int efa_mmap(struct ib_ucontext *ibucontext, 1808 struct vm_area_struct *vma) 1809 { 1810 struct efa_ucontext *ucontext = to_eucontext(ibucontext); 1811 struct efa_dev *dev = to_edev(ibucontext->device); 1812 size_t length = vma->vm_end - vma->vm_start; 1813 1814 ibdev_dbg(&dev->ibdev, 1815 "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n", 1816 vma->vm_start, vma->vm_end, length, vma->vm_pgoff); 1817 1818 return __efa_mmap(dev, ucontext, vma); 1819 } 1820 1821 static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah) 1822 { 1823 struct efa_com_destroy_ah_params params = { 1824 .ah = ah->ah, 1825 .pdn = to_epd(ah->ibah.pd)->pdn, 1826 }; 1827 1828 return efa_com_destroy_ah(&dev->edev, ¶ms); 1829 } 1830 1831 int efa_create_ah(struct ib_ah *ibah, 1832 struct rdma_ah_init_attr *init_attr, 1833 struct ib_udata *udata) 1834 { 1835 struct rdma_ah_attr *ah_attr = init_attr->ah_attr; 1836 struct efa_dev *dev = to_edev(ibah->device); 1837 struct efa_com_create_ah_params params = {}; 1838 struct efa_ibv_create_ah_resp resp = {}; 1839 struct efa_com_create_ah_result result; 1840 struct efa_ah *ah = to_eah(ibah); 1841 int err; 1842 1843 if (!(init_attr->flags & RDMA_CREATE_AH_SLEEPABLE)) { 1844 ibdev_dbg(&dev->ibdev, 1845 "Create address handle is not supported in atomic context\n"); 1846 err = -EOPNOTSUPP; 1847 goto err_out; 1848 } 1849 1850 if (udata->inlen && 1851 !ib_is_udata_cleared(udata, 0, udata->inlen)) { 1852 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n"); 1853 err = -EINVAL; 1854 goto err_out; 1855 } 1856 1857 memcpy(params.dest_addr, ah_attr->grh.dgid.raw, 1858 sizeof(params.dest_addr)); 1859 params.pdn = to_epd(ibah->pd)->pdn; 1860 err = efa_com_create_ah(&dev->edev, ¶ms, &result); 1861 if (err) 1862 goto err_out; 1863 1864 memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id)); 1865 ah->ah = result.ah; 1866 1867 resp.efa_address_handle = result.ah; 1868 1869 if (udata->outlen) { 1870 err = ib_copy_to_udata(udata, &resp, 1871 min(sizeof(resp), udata->outlen)); 1872 if (err) { 1873 ibdev_dbg(&dev->ibdev, 1874 "Failed to copy udata for create_ah response\n"); 1875 goto err_destroy_ah; 1876 } 1877 } 1878 ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah); 1879 1880 return 0; 1881 1882 err_destroy_ah: 1883 efa_ah_destroy(dev, ah); 1884 err_out: 1885 atomic64_inc(&dev->stats.create_ah_err); 1886 return err; 1887 } 1888 1889 int efa_destroy_ah(struct ib_ah *ibah, u32 flags) 1890 { 1891 struct efa_dev *dev = to_edev(ibah->pd->device); 1892 struct efa_ah *ah = to_eah(ibah); 1893 1894 ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah); 1895 1896 if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) { 1897 ibdev_dbg(&dev->ibdev, 1898 "Destroy address handle is not supported in atomic context\n"); 1899 return -EOPNOTSUPP; 1900 } 1901 1902 efa_ah_destroy(dev, ah); 1903 return 0; 1904 } 1905 1906 struct rdma_hw_stats *efa_alloc_hw_port_stats(struct ib_device *ibdev, 1907 u32 port_num) 1908 { 1909 return rdma_alloc_hw_stats_struct(efa_port_stats_names, 1910 ARRAY_SIZE(efa_port_stats_names), 1911 RDMA_HW_STATS_DEFAULT_LIFESPAN); 1912 } 1913 1914 struct rdma_hw_stats *efa_alloc_hw_device_stats(struct ib_device *ibdev) 1915 { 1916 return rdma_alloc_hw_stats_struct(efa_device_stats_names, 1917 ARRAY_SIZE(efa_device_stats_names), 1918 RDMA_HW_STATS_DEFAULT_LIFESPAN); 1919 } 1920 1921 static int efa_fill_device_stats(struct efa_dev *dev, 1922 struct rdma_hw_stats *stats) 1923 { 1924 struct efa_com_stats_admin *as = &dev->edev.aq.stats; 1925 struct efa_stats *s = &dev->stats; 1926 1927 stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd); 1928 stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd); 1929 stats->value[EFA_CMDS_ERR] = atomic64_read(&as->cmd_err); 1930 stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion); 1931 1932 stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd); 1933 stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->alloc_pd_err); 1934 stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->create_qp_err); 1935 stats->value[EFA_CREATE_CQ_ERR] = atomic64_read(&s->create_cq_err); 1936 stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->reg_mr_err); 1937 stats->value[EFA_ALLOC_UCONTEXT_ERR] = 1938 atomic64_read(&s->alloc_ucontext_err); 1939 stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->create_ah_err); 1940 stats->value[EFA_MMAP_ERR] = atomic64_read(&s->mmap_err); 1941 1942 return ARRAY_SIZE(efa_device_stats_names); 1943 } 1944 1945 static int efa_fill_port_stats(struct efa_dev *dev, struct rdma_hw_stats *stats, 1946 u32 port_num) 1947 { 1948 struct efa_com_get_stats_params params = {}; 1949 union efa_com_get_stats_result result; 1950 struct efa_com_rdma_read_stats *rrs; 1951 struct efa_com_messages_stats *ms; 1952 struct efa_com_basic_stats *bs; 1953 int err; 1954 1955 params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL; 1956 params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC; 1957 1958 err = efa_com_get_stats(&dev->edev, ¶ms, &result); 1959 if (err) 1960 return err; 1961 1962 bs = &result.basic_stats; 1963 stats->value[EFA_TX_BYTES] = bs->tx_bytes; 1964 stats->value[EFA_TX_PKTS] = bs->tx_pkts; 1965 stats->value[EFA_RX_BYTES] = bs->rx_bytes; 1966 stats->value[EFA_RX_PKTS] = bs->rx_pkts; 1967 stats->value[EFA_RX_DROPS] = bs->rx_drops; 1968 1969 params.type = EFA_ADMIN_GET_STATS_TYPE_MESSAGES; 1970 err = efa_com_get_stats(&dev->edev, ¶ms, &result); 1971 if (err) 1972 return err; 1973 1974 ms = &result.messages_stats; 1975 stats->value[EFA_SEND_BYTES] = ms->send_bytes; 1976 stats->value[EFA_SEND_WRS] = ms->send_wrs; 1977 stats->value[EFA_RECV_BYTES] = ms->recv_bytes; 1978 stats->value[EFA_RECV_WRS] = ms->recv_wrs; 1979 1980 params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_READ; 1981 err = efa_com_get_stats(&dev->edev, ¶ms, &result); 1982 if (err) 1983 return err; 1984 1985 rrs = &result.rdma_read_stats; 1986 stats->value[EFA_RDMA_READ_WRS] = rrs->read_wrs; 1987 stats->value[EFA_RDMA_READ_BYTES] = rrs->read_bytes; 1988 stats->value[EFA_RDMA_READ_WR_ERR] = rrs->read_wr_err; 1989 stats->value[EFA_RDMA_READ_RESP_BYTES] = rrs->read_resp_bytes; 1990 1991 return ARRAY_SIZE(efa_port_stats_names); 1992 } 1993 1994 int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats, 1995 u32 port_num, int index) 1996 { 1997 if (port_num) 1998 return efa_fill_port_stats(to_edev(ibdev), stats, port_num); 1999 else 2000 return efa_fill_device_stats(to_edev(ibdev), stats); 2001 } 2002 2003 enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev, 2004 u32 port_num) 2005 { 2006 return IB_LINK_LAYER_UNSPECIFIED; 2007 } 2008 2009