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1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB2/*3 * Copyright 2018-2024 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#define UVERBS_MODULE_NAME efa_ib17#include <rdma/uverbs_named_ioctl.h>18#include <rdma/ib_user_ioctl_cmds.h>19 20#include "efa.h"21#include "efa_io_defs.h"22 23enum {24 EFA_MMAP_DMA_PAGE = 0,25 EFA_MMAP_IO_WC,26 EFA_MMAP_IO_NC,27};28 29struct efa_user_mmap_entry {30 struct rdma_user_mmap_entry rdma_entry;31 u64 address;32 u8 mmap_flag;33};34 35#define EFA_DEFINE_DEVICE_STATS(op) \36 op(EFA_SUBMITTED_CMDS, "submitted_cmds") \37 op(EFA_COMPLETED_CMDS, "completed_cmds") \38 op(EFA_CMDS_ERR, "cmds_err") \39 op(EFA_NO_COMPLETION_CMDS, "no_completion_cmds") \40 op(EFA_KEEP_ALIVE_RCVD, "keep_alive_rcvd") \41 op(EFA_ALLOC_PD_ERR, "alloc_pd_err") \42 op(EFA_CREATE_QP_ERR, "create_qp_err") \43 op(EFA_CREATE_CQ_ERR, "create_cq_err") \44 op(EFA_REG_MR_ERR, "reg_mr_err") \45 op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \46 op(EFA_CREATE_AH_ERR, "create_ah_err") \47 op(EFA_MMAP_ERR, "mmap_err")48 49#define EFA_DEFINE_PORT_STATS(op) \50 op(EFA_TX_BYTES, "tx_bytes") \51 op(EFA_TX_PKTS, "tx_pkts") \52 op(EFA_RX_BYTES, "rx_bytes") \53 op(EFA_RX_PKTS, "rx_pkts") \54 op(EFA_RX_DROPS, "rx_drops") \55 op(EFA_SEND_BYTES, "send_bytes") \56 op(EFA_SEND_WRS, "send_wrs") \57 op(EFA_RECV_BYTES, "recv_bytes") \58 op(EFA_RECV_WRS, "recv_wrs") \59 op(EFA_RDMA_READ_WRS, "rdma_read_wrs") \60 op(EFA_RDMA_READ_BYTES, "rdma_read_bytes") \61 op(EFA_RDMA_READ_WR_ERR, "rdma_read_wr_err") \62 op(EFA_RDMA_READ_RESP_BYTES, "rdma_read_resp_bytes") \63 op(EFA_RDMA_WRITE_WRS, "rdma_write_wrs") \64 op(EFA_RDMA_WRITE_BYTES, "rdma_write_bytes") \65 op(EFA_RDMA_WRITE_WR_ERR, "rdma_write_wr_err") \66 op(EFA_RDMA_WRITE_RECV_BYTES, "rdma_write_recv_bytes") \67 68#define EFA_STATS_ENUM(ename, name) ename,69#define EFA_STATS_STR(ename, nam) \70 [ename].name = nam,71 72enum efa_hw_device_stats {73 EFA_DEFINE_DEVICE_STATS(EFA_STATS_ENUM)74};75 76static const struct rdma_stat_desc efa_device_stats_descs[] = {77 EFA_DEFINE_DEVICE_STATS(EFA_STATS_STR)78};79 80enum efa_hw_port_stats {81 EFA_DEFINE_PORT_STATS(EFA_STATS_ENUM)82};83 84static const struct rdma_stat_desc efa_port_stats_descs[] = {85 EFA_DEFINE_PORT_STATS(EFA_STATS_STR)86};87 88#define EFA_CHUNK_PAYLOAD_SHIFT 1289#define EFA_CHUNK_PAYLOAD_SIZE BIT(EFA_CHUNK_PAYLOAD_SHIFT)90#define EFA_CHUNK_PAYLOAD_PTR_SIZE 891 92#define EFA_CHUNK_SHIFT 1293#define EFA_CHUNK_SIZE BIT(EFA_CHUNK_SHIFT)94#define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info)95 96#define EFA_PTRS_PER_CHUNK \97 ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)98 99#define EFA_CHUNK_USED_SIZE \100 ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)101 102struct pbl_chunk {103 dma_addr_t dma_addr;104 u64 *buf;105 u32 length;106};107 108struct pbl_chunk_list {109 struct pbl_chunk *chunks;110 unsigned int size;111};112 113struct pbl_context {114 union {115 struct {116 dma_addr_t dma_addr;117 } continuous;118 struct {119 u32 pbl_buf_size_in_pages;120 struct scatterlist *sgl;121 int sg_dma_cnt;122 struct pbl_chunk_list chunk_list;123 } indirect;124 } phys;125 u64 *pbl_buf;126 u32 pbl_buf_size_in_bytes;127 u8 physically_continuous;128};129 130static inline struct efa_dev *to_edev(struct ib_device *ibdev)131{132 return container_of(ibdev, struct efa_dev, ibdev);133}134 135static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)136{137 return container_of(ibucontext, struct efa_ucontext, ibucontext);138}139 140static inline struct efa_pd *to_epd(struct ib_pd *ibpd)141{142 return container_of(ibpd, struct efa_pd, ibpd);143}144 145static inline struct efa_mr *to_emr(struct ib_mr *ibmr)146{147 return container_of(ibmr, struct efa_mr, ibmr);148}149 150static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)151{152 return container_of(ibqp, struct efa_qp, ibqp);153}154 155static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)156{157 return container_of(ibcq, struct efa_cq, ibcq);158}159 160static inline struct efa_ah *to_eah(struct ib_ah *ibah)161{162 return container_of(ibah, struct efa_ah, ibah);163}164 165static inline struct efa_user_mmap_entry *166to_emmap(struct rdma_user_mmap_entry *rdma_entry)167{168 return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry);169}170 171#define EFA_DEV_CAP(dev, cap) \172 ((dev)->dev_attr.device_caps & \173 EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_##cap##_MASK)174 175#define is_reserved_cleared(reserved) \176 !memchr_inv(reserved, 0, sizeof(reserved))177 178static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,179 size_t size, enum dma_data_direction dir)180{181 void *addr;182 183 addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);184 if (!addr)185 return NULL;186 187 *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);188 if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {189 ibdev_err(&dev->ibdev, "Failed to map DMA address\n");190 free_pages_exact(addr, size);191 return NULL;192 }193 194 return addr;195}196 197static void efa_free_mapped(struct efa_dev *dev, void *cpu_addr,198 dma_addr_t dma_addr,199 size_t size, enum dma_data_direction dir)200{201 dma_unmap_single(&dev->pdev->dev, dma_addr, size, dir);202 free_pages_exact(cpu_addr, size);203}204 205int efa_query_device(struct ib_device *ibdev,206 struct ib_device_attr *props,207 struct ib_udata *udata)208{209 struct efa_com_get_device_attr_result *dev_attr;210 struct efa_ibv_ex_query_device_resp resp = {};211 struct efa_dev *dev = to_edev(ibdev);212 int err;213 214 if (udata && udata->inlen &&215 !ib_is_udata_cleared(udata, 0, udata->inlen)) {216 ibdev_dbg(ibdev,217 "Incompatible ABI params, udata not cleared\n");218 return -EINVAL;219 }220 221 dev_attr = &dev->dev_attr;222 223 memset(props, 0, sizeof(*props));224 props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;225 props->page_size_cap = dev_attr->page_size_cap;226 props->vendor_id = dev->pdev->vendor;227 props->vendor_part_id = dev->pdev->device;228 props->hw_ver = dev->pdev->subsystem_device;229 props->max_qp = dev_attr->max_qp;230 props->max_cq = dev_attr->max_cq;231 props->max_pd = dev_attr->max_pd;232 props->max_mr = dev_attr->max_mr;233 props->max_ah = dev_attr->max_ah;234 props->max_cqe = dev_attr->max_cq_depth;235 props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,236 dev_attr->max_rq_depth);237 props->max_send_sge = dev_attr->max_sq_sge;238 props->max_recv_sge = dev_attr->max_rq_sge;239 props->max_sge_rd = dev_attr->max_wr_rdma_sge;240 props->max_pkeys = 1;241 242 if (udata && udata->outlen) {243 resp.max_sq_sge = dev_attr->max_sq_sge;244 resp.max_rq_sge = dev_attr->max_rq_sge;245 resp.max_sq_wr = dev_attr->max_sq_depth;246 resp.max_rq_wr = dev_attr->max_rq_depth;247 resp.max_rdma_size = dev_attr->max_rdma_size;248 249 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_WITH_SGID;250 if (EFA_DEV_CAP(dev, RDMA_READ))251 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ;252 253 if (EFA_DEV_CAP(dev, RNR_RETRY))254 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY;255 256 if (EFA_DEV_CAP(dev, DATA_POLLING_128))257 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_DATA_POLLING_128;258 259 if (EFA_DEV_CAP(dev, RDMA_WRITE))260 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_WRITE;261 262 if (EFA_DEV_CAP(dev, UNSOLICITED_WRITE_RECV))263 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_UNSOLICITED_WRITE_RECV;264 265 if (dev->neqs)266 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS;267 268 err = ib_copy_to_udata(udata, &resp,269 min(sizeof(resp), udata->outlen));270 if (err) {271 ibdev_dbg(ibdev,272 "Failed to copy udata for query_device\n");273 return err;274 }275 }276 277 return 0;278}279 280int efa_query_port(struct ib_device *ibdev, u32 port,281 struct ib_port_attr *props)282{283 struct efa_dev *dev = to_edev(ibdev);284 285 props->lmc = 1;286 287 props->state = IB_PORT_ACTIVE;288 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;289 props->gid_tbl_len = 1;290 props->pkey_tbl_len = 1;291 props->active_speed = IB_SPEED_EDR;292 props->active_width = IB_WIDTH_4X;293 props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);294 props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);295 props->max_msg_sz = dev->dev_attr.mtu;296 props->max_vl_num = 1;297 298 return 0;299}300 301int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,302 int qp_attr_mask,303 struct ib_qp_init_attr *qp_init_attr)304{305 struct efa_dev *dev = to_edev(ibqp->device);306 struct efa_com_query_qp_params params = {};307 struct efa_com_query_qp_result result;308 struct efa_qp *qp = to_eqp(ibqp);309 int err;310 311#define EFA_QUERY_QP_SUPP_MASK \312 (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \313 IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP | IB_QP_RNR_RETRY)314 315 if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {316 ibdev_dbg(&dev->ibdev,317 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",318 qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);319 return -EOPNOTSUPP;320 }321 322 memset(qp_attr, 0, sizeof(*qp_attr));323 memset(qp_init_attr, 0, sizeof(*qp_init_attr));324 325 params.qp_handle = qp->qp_handle;326 err = efa_com_query_qp(&dev->edev, ¶ms, &result);327 if (err)328 return err;329 330 qp_attr->qp_state = result.qp_state;331 qp_attr->qkey = result.qkey;332 qp_attr->sq_psn = result.sq_psn;333 qp_attr->sq_draining = result.sq_draining;334 qp_attr->port_num = 1;335 qp_attr->rnr_retry = result.rnr_retry;336 337 qp_attr->cap.max_send_wr = qp->max_send_wr;338 qp_attr->cap.max_recv_wr = qp->max_recv_wr;339 qp_attr->cap.max_send_sge = qp->max_send_sge;340 qp_attr->cap.max_recv_sge = qp->max_recv_sge;341 qp_attr->cap.max_inline_data = qp->max_inline_data;342 343 qp_init_attr->qp_type = ibqp->qp_type;344 qp_init_attr->recv_cq = ibqp->recv_cq;345 qp_init_attr->send_cq = ibqp->send_cq;346 qp_init_attr->qp_context = ibqp->qp_context;347 qp_init_attr->cap = qp_attr->cap;348 349 return 0;350}351 352int efa_query_gid(struct ib_device *ibdev, u32 port, int index,353 union ib_gid *gid)354{355 struct efa_dev *dev = to_edev(ibdev);356 357 memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr));358 359 return 0;360}361 362int efa_query_pkey(struct ib_device *ibdev, u32 port, u16 index,363 u16 *pkey)364{365 if (index > 0)366 return -EINVAL;367 368 *pkey = 0xffff;369 return 0;370}371 372static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)373{374 struct efa_com_dealloc_pd_params params = {375 .pdn = pdn,376 };377 378 return efa_com_dealloc_pd(&dev->edev, ¶ms);379}380 381int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)382{383 struct efa_dev *dev = to_edev(ibpd->device);384 struct efa_ibv_alloc_pd_resp resp = {};385 struct efa_com_alloc_pd_result result;386 struct efa_pd *pd = to_epd(ibpd);387 int err;388 389 if (udata->inlen &&390 !ib_is_udata_cleared(udata, 0, udata->inlen)) {391 ibdev_dbg(&dev->ibdev,392 "Incompatible ABI params, udata not cleared\n");393 err = -EINVAL;394 goto err_out;395 }396 397 err = efa_com_alloc_pd(&dev->edev, &result);398 if (err)399 goto err_out;400 401 pd->pdn = result.pdn;402 resp.pdn = result.pdn;403 404 if (udata->outlen) {405 err = ib_copy_to_udata(udata, &resp,406 min(sizeof(resp), udata->outlen));407 if (err) {408 ibdev_dbg(&dev->ibdev,409 "Failed to copy udata for alloc_pd\n");410 goto err_dealloc_pd;411 }412 }413 414 ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);415 416 return 0;417 418err_dealloc_pd:419 efa_pd_dealloc(dev, result.pdn);420err_out:421 atomic64_inc(&dev->stats.alloc_pd_err);422 return err;423}424 425int efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)426{427 struct efa_dev *dev = to_edev(ibpd->device);428 struct efa_pd *pd = to_epd(ibpd);429 430 ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);431 efa_pd_dealloc(dev, pd->pdn);432 return 0;433}434 435static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)436{437 struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };438 439 return efa_com_destroy_qp(&dev->edev, ¶ms);440}441 442static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp)443{444 rdma_user_mmap_entry_remove(qp->rq_mmap_entry);445 rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry);446 rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry);447 rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry);448}449 450int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)451{452 struct efa_dev *dev = to_edev(ibqp->pd->device);453 struct efa_qp *qp = to_eqp(ibqp);454 int err;455 456 ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);457 458 err = efa_destroy_qp_handle(dev, qp->qp_handle);459 if (err)460 return err;461 462 efa_qp_user_mmap_entries_remove(qp);463 464 if (qp->rq_cpu_addr) {465 ibdev_dbg(&dev->ibdev,466 "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",467 qp->rq_cpu_addr, qp->rq_size,468 &qp->rq_dma_addr);469 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,470 qp->rq_size, DMA_TO_DEVICE);471 }472 473 return 0;474}475 476static struct rdma_user_mmap_entry*477efa_user_mmap_entry_insert(struct ib_ucontext *ucontext,478 u64 address, size_t length,479 u8 mmap_flag, u64 *offset)480{481 struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);482 int err;483 484 if (!entry)485 return NULL;486 487 entry->address = address;488 entry->mmap_flag = mmap_flag;489 490 err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry,491 length);492 if (err) {493 kfree(entry);494 return NULL;495 }496 *offset = rdma_user_mmap_get_offset(&entry->rdma_entry);497 498 return &entry->rdma_entry;499}500 501static int qp_mmap_entries_setup(struct efa_qp *qp,502 struct efa_dev *dev,503 struct efa_ucontext *ucontext,504 struct efa_com_create_qp_params *params,505 struct efa_ibv_create_qp_resp *resp)506{507 size_t length;508 u64 address;509 510 address = dev->db_bar_addr + resp->sq_db_offset;511 qp->sq_db_mmap_entry =512 efa_user_mmap_entry_insert(&ucontext->ibucontext,513 address,514 PAGE_SIZE, EFA_MMAP_IO_NC,515 &resp->sq_db_mmap_key);516 if (!qp->sq_db_mmap_entry)517 return -ENOMEM;518 519 resp->sq_db_offset &= ~PAGE_MASK;520 521 address = dev->mem_bar_addr + resp->llq_desc_offset;522 length = PAGE_ALIGN(params->sq_ring_size_in_bytes +523 offset_in_page(resp->llq_desc_offset));524 525 qp->llq_desc_mmap_entry =526 efa_user_mmap_entry_insert(&ucontext->ibucontext,527 address, length,528 EFA_MMAP_IO_WC,529 &resp->llq_desc_mmap_key);530 if (!qp->llq_desc_mmap_entry)531 goto err_remove_mmap;532 533 resp->llq_desc_offset &= ~PAGE_MASK;534 535 if (qp->rq_size) {536 address = dev->db_bar_addr + resp->rq_db_offset;537 538 qp->rq_db_mmap_entry =539 efa_user_mmap_entry_insert(&ucontext->ibucontext,540 address, PAGE_SIZE,541 EFA_MMAP_IO_NC,542 &resp->rq_db_mmap_key);543 if (!qp->rq_db_mmap_entry)544 goto err_remove_mmap;545 546 resp->rq_db_offset &= ~PAGE_MASK;547 548 address = virt_to_phys(qp->rq_cpu_addr);549 qp->rq_mmap_entry =550 efa_user_mmap_entry_insert(&ucontext->ibucontext,551 address, qp->rq_size,552 EFA_MMAP_DMA_PAGE,553 &resp->rq_mmap_key);554 if (!qp->rq_mmap_entry)555 goto err_remove_mmap;556 557 resp->rq_mmap_size = qp->rq_size;558 }559 560 return 0;561 562err_remove_mmap:563 efa_qp_user_mmap_entries_remove(qp);564 565 return -ENOMEM;566}567 568static int efa_qp_validate_cap(struct efa_dev *dev,569 struct ib_qp_init_attr *init_attr)570{571 if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {572 ibdev_dbg(&dev->ibdev,573 "qp: requested send wr[%u] exceeds the max[%u]\n",574 init_attr->cap.max_send_wr,575 dev->dev_attr.max_sq_depth);576 return -EINVAL;577 }578 if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {579 ibdev_dbg(&dev->ibdev,580 "qp: requested receive wr[%u] exceeds the max[%u]\n",581 init_attr->cap.max_recv_wr,582 dev->dev_attr.max_rq_depth);583 return -EINVAL;584 }585 if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {586 ibdev_dbg(&dev->ibdev,587 "qp: requested sge send[%u] exceeds the max[%u]\n",588 init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);589 return -EINVAL;590 }591 if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {592 ibdev_dbg(&dev->ibdev,593 "qp: requested sge recv[%u] exceeds the max[%u]\n",594 init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);595 return -EINVAL;596 }597 if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {598 ibdev_dbg(&dev->ibdev,599 "qp: requested inline data[%u] exceeds the max[%u]\n",600 init_attr->cap.max_inline_data,601 dev->dev_attr.inline_buf_size);602 return -EINVAL;603 }604 605 return 0;606}607 608static int efa_qp_validate_attr(struct efa_dev *dev,609 struct ib_qp_init_attr *init_attr)610{611 if (init_attr->qp_type != IB_QPT_DRIVER &&612 init_attr->qp_type != IB_QPT_UD) {613 ibdev_dbg(&dev->ibdev,614 "Unsupported qp type %d\n", init_attr->qp_type);615 return -EOPNOTSUPP;616 }617 618 if (init_attr->srq) {619 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");620 return -EOPNOTSUPP;621 }622 623 if (init_attr->create_flags) {624 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");625 return -EOPNOTSUPP;626 }627 628 return 0;629}630 631int efa_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,632 struct ib_udata *udata)633{634 struct efa_com_create_qp_params create_qp_params = {};635 struct efa_com_create_qp_result create_qp_resp;636 struct efa_dev *dev = to_edev(ibqp->device);637 struct efa_ibv_create_qp_resp resp = {};638 struct efa_ibv_create_qp cmd = {};639 struct efa_qp *qp = to_eqp(ibqp);640 struct efa_ucontext *ucontext;641 u16 supported_efa_flags = 0;642 int err;643 644 ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,645 ibucontext);646 647 err = efa_qp_validate_cap(dev, init_attr);648 if (err)649 goto err_out;650 651 err = efa_qp_validate_attr(dev, init_attr);652 if (err)653 goto err_out;654 655 if (offsetofend(typeof(cmd), driver_qp_type) > udata->inlen) {656 ibdev_dbg(&dev->ibdev,657 "Incompatible ABI params, no input udata\n");658 err = -EINVAL;659 goto err_out;660 }661 662 if (udata->inlen > sizeof(cmd) &&663 !ib_is_udata_cleared(udata, sizeof(cmd),664 udata->inlen - sizeof(cmd))) {665 ibdev_dbg(&dev->ibdev,666 "Incompatible ABI params, unknown fields in udata\n");667 err = -EINVAL;668 goto err_out;669 }670 671 err = ib_copy_from_udata(&cmd, udata,672 min(sizeof(cmd), udata->inlen));673 if (err) {674 ibdev_dbg(&dev->ibdev,675 "Cannot copy udata for create_qp\n");676 goto err_out;677 }678 679 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_90)) {680 ibdev_dbg(&dev->ibdev,681 "Incompatible ABI params, unknown fields in udata\n");682 err = -EINVAL;683 goto err_out;684 }685 686 if (EFA_DEV_CAP(dev, UNSOLICITED_WRITE_RECV))687 supported_efa_flags |= EFA_CREATE_QP_WITH_UNSOLICITED_WRITE_RECV;688 689 if (cmd.flags & ~supported_efa_flags) {690 ibdev_dbg(&dev->ibdev, "Unsupported EFA QP create flags[%#x], supported[%#x]\n",691 cmd.flags, supported_efa_flags);692 err = -EOPNOTSUPP;693 goto err_out;694 }695 696 create_qp_params.uarn = ucontext->uarn;697 create_qp_params.pd = to_epd(ibqp->pd)->pdn;698 699 if (init_attr->qp_type == IB_QPT_UD) {700 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;701 } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {702 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;703 } else {704 ibdev_dbg(&dev->ibdev,705 "Unsupported qp type %d driver qp type %d\n",706 init_attr->qp_type, cmd.driver_qp_type);707 err = -EOPNOTSUPP;708 goto err_out;709 }710 711 ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",712 init_attr->qp_type, cmd.driver_qp_type);713 create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;714 create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;715 create_qp_params.sq_depth = init_attr->cap.max_send_wr;716 create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;717 718 create_qp_params.rq_depth = init_attr->cap.max_recv_wr;719 create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;720 qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);721 if (qp->rq_size) {722 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,723 qp->rq_size, DMA_TO_DEVICE);724 if (!qp->rq_cpu_addr) {725 err = -ENOMEM;726 goto err_out;727 }728 729 ibdev_dbg(&dev->ibdev,730 "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",731 qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);732 create_qp_params.rq_base_addr = qp->rq_dma_addr;733 }734 735 if (cmd.flags & EFA_CREATE_QP_WITH_UNSOLICITED_WRITE_RECV)736 create_qp_params.unsolicited_write_recv = true;737 738 err = efa_com_create_qp(&dev->edev, &create_qp_params,739 &create_qp_resp);740 if (err)741 goto err_free_mapped;742 743 resp.sq_db_offset = create_qp_resp.sq_db_offset;744 resp.rq_db_offset = create_qp_resp.rq_db_offset;745 resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;746 resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;747 resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;748 749 err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,750 &resp);751 if (err)752 goto err_destroy_qp;753 754 qp->qp_handle = create_qp_resp.qp_handle;755 qp->ibqp.qp_num = create_qp_resp.qp_num;756 qp->max_send_wr = init_attr->cap.max_send_wr;757 qp->max_recv_wr = init_attr->cap.max_recv_wr;758 qp->max_send_sge = init_attr->cap.max_send_sge;759 qp->max_recv_sge = init_attr->cap.max_recv_sge;760 qp->max_inline_data = init_attr->cap.max_inline_data;761 762 if (udata->outlen) {763 err = ib_copy_to_udata(udata, &resp,764 min(sizeof(resp), udata->outlen));765 if (err) {766 ibdev_dbg(&dev->ibdev,767 "Failed to copy udata for qp[%u]\n",768 create_qp_resp.qp_num);769 goto err_remove_mmap_entries;770 }771 }772 773 ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);774 775 return 0;776 777err_remove_mmap_entries:778 efa_qp_user_mmap_entries_remove(qp);779err_destroy_qp:780 efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);781err_free_mapped:782 if (qp->rq_size)783 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,784 qp->rq_size, DMA_TO_DEVICE);785err_out:786 atomic64_inc(&dev->stats.create_qp_err);787 return err;788}789 790static const struct {791 int valid;792 enum ib_qp_attr_mask req_param;793 enum ib_qp_attr_mask opt_param;794} srd_qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {795 [IB_QPS_RESET] = {796 [IB_QPS_RESET] = { .valid = 1 },797 [IB_QPS_INIT] = {798 .valid = 1,799 .req_param = IB_QP_PKEY_INDEX |800 IB_QP_PORT |801 IB_QP_QKEY,802 },803 },804 [IB_QPS_INIT] = {805 [IB_QPS_RESET] = { .valid = 1 },806 [IB_QPS_ERR] = { .valid = 1 },807 [IB_QPS_INIT] = {808 .valid = 1,809 .opt_param = IB_QP_PKEY_INDEX |810 IB_QP_PORT |811 IB_QP_QKEY,812 },813 [IB_QPS_RTR] = {814 .valid = 1,815 .opt_param = IB_QP_PKEY_INDEX |816 IB_QP_QKEY,817 },818 },819 [IB_QPS_RTR] = {820 [IB_QPS_RESET] = { .valid = 1 },821 [IB_QPS_ERR] = { .valid = 1 },822 [IB_QPS_RTS] = {823 .valid = 1,824 .req_param = IB_QP_SQ_PSN,825 .opt_param = IB_QP_CUR_STATE |826 IB_QP_QKEY |827 IB_QP_RNR_RETRY,828 829 }830 },831 [IB_QPS_RTS] = {832 [IB_QPS_RESET] = { .valid = 1 },833 [IB_QPS_ERR] = { .valid = 1 },834 [IB_QPS_RTS] = {835 .valid = 1,836 .opt_param = IB_QP_CUR_STATE |837 IB_QP_QKEY,838 },839 [IB_QPS_SQD] = {840 .valid = 1,841 .opt_param = IB_QP_EN_SQD_ASYNC_NOTIFY,842 },843 },844 [IB_QPS_SQD] = {845 [IB_QPS_RESET] = { .valid = 1 },846 [IB_QPS_ERR] = { .valid = 1 },847 [IB_QPS_RTS] = {848 .valid = 1,849 .opt_param = IB_QP_CUR_STATE |850 IB_QP_QKEY,851 },852 [IB_QPS_SQD] = {853 .valid = 1,854 .opt_param = IB_QP_PKEY_INDEX |855 IB_QP_QKEY,856 }857 },858 [IB_QPS_SQE] = {859 [IB_QPS_RESET] = { .valid = 1 },860 [IB_QPS_ERR] = { .valid = 1 },861 [IB_QPS_RTS] = {862 .valid = 1,863 .opt_param = IB_QP_CUR_STATE |864 IB_QP_QKEY,865 }866 },867 [IB_QPS_ERR] = {868 [IB_QPS_RESET] = { .valid = 1 },869 [IB_QPS_ERR] = { .valid = 1 },870 }871};872 873static bool efa_modify_srd_qp_is_ok(enum ib_qp_state cur_state,874 enum ib_qp_state next_state,875 enum ib_qp_attr_mask mask)876{877 enum ib_qp_attr_mask req_param, opt_param;878 879 if (mask & IB_QP_CUR_STATE &&880 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&881 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)882 return false;883 884 if (!srd_qp_state_table[cur_state][next_state].valid)885 return false;886 887 req_param = srd_qp_state_table[cur_state][next_state].req_param;888 opt_param = srd_qp_state_table[cur_state][next_state].opt_param;889 890 if ((mask & req_param) != req_param)891 return false;892 893 if (mask & ~(req_param | opt_param | IB_QP_STATE))894 return false;895 896 return true;897}898 899static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,900 struct ib_qp_attr *qp_attr, int qp_attr_mask,901 enum ib_qp_state cur_state,902 enum ib_qp_state new_state)903{904 int err;905 906#define EFA_MODIFY_QP_SUPP_MASK \907 (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \908 IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN | \909 IB_QP_RNR_RETRY)910 911 if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {912 ibdev_dbg(&dev->ibdev,913 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",914 qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);915 return -EOPNOTSUPP;916 }917 918 if (qp->ibqp.qp_type == IB_QPT_DRIVER)919 err = !efa_modify_srd_qp_is_ok(cur_state, new_state,920 qp_attr_mask);921 else922 err = !ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,923 qp_attr_mask);924 925 if (err) {926 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");927 return -EINVAL;928 }929 930 if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {931 ibdev_dbg(&dev->ibdev, "Can't change port num\n");932 return -EOPNOTSUPP;933 }934 935 if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {936 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");937 return -EOPNOTSUPP;938 }939 940 return 0;941}942 943int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,944 int qp_attr_mask, struct ib_udata *udata)945{946 struct efa_dev *dev = to_edev(ibqp->device);947 struct efa_com_modify_qp_params params = {};948 struct efa_qp *qp = to_eqp(ibqp);949 enum ib_qp_state cur_state;950 enum ib_qp_state new_state;951 int err;952 953 if (qp_attr_mask & ~IB_QP_ATTR_STANDARD_BITS)954 return -EOPNOTSUPP;955 956 if (udata->inlen &&957 !ib_is_udata_cleared(udata, 0, udata->inlen)) {958 ibdev_dbg(&dev->ibdev,959 "Incompatible ABI params, udata not cleared\n");960 return -EINVAL;961 }962 963 cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :964 qp->state;965 new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;966 967 err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,968 new_state);969 if (err)970 return err;971 972 params.qp_handle = qp->qp_handle;973 974 if (qp_attr_mask & IB_QP_STATE) {975 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QP_STATE,976 1);977 EFA_SET(¶ms.modify_mask,978 EFA_ADMIN_MODIFY_QP_CMD_CUR_QP_STATE, 1);979 params.cur_qp_state = cur_state;980 params.qp_state = new_state;981 }982 983 if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {984 EFA_SET(¶ms.modify_mask,985 EFA_ADMIN_MODIFY_QP_CMD_SQ_DRAINED_ASYNC_NOTIFY, 1);986 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;987 }988 989 if (qp_attr_mask & IB_QP_QKEY) {990 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_QKEY, 1);991 params.qkey = qp_attr->qkey;992 }993 994 if (qp_attr_mask & IB_QP_SQ_PSN) {995 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_SQ_PSN, 1);996 params.sq_psn = qp_attr->sq_psn;997 }998 999 if (qp_attr_mask & IB_QP_RNR_RETRY) {1000 EFA_SET(¶ms.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY,1001 1);1002 params.rnr_retry = qp_attr->rnr_retry;1003 }1004 1005 err = efa_com_modify_qp(&dev->edev, ¶ms);1006 if (err)1007 return err;1008 1009 qp->state = new_state;1010 1011 return 0;1012}1013 1014static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)1015{1016 struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };1017 1018 return efa_com_destroy_cq(&dev->edev, ¶ms);1019}1020 1021static void efa_cq_user_mmap_entries_remove(struct efa_cq *cq)1022{1023 rdma_user_mmap_entry_remove(cq->db_mmap_entry);1024 rdma_user_mmap_entry_remove(cq->mmap_entry);1025}1026 1027int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)1028{1029 struct efa_dev *dev = to_edev(ibcq->device);1030 struct efa_cq *cq = to_ecq(ibcq);1031 1032 ibdev_dbg(&dev->ibdev,1033 "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",1034 cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);1035 1036 efa_destroy_cq_idx(dev, cq->cq_idx);1037 efa_cq_user_mmap_entries_remove(cq);1038 if (cq->eq) {1039 xa_erase(&dev->cqs_xa, cq->cq_idx);1040 synchronize_irq(cq->eq->irq.irqn);1041 }1042 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,1043 DMA_FROM_DEVICE);1044 return 0;1045}1046 1047static struct efa_eq *efa_vec2eq(struct efa_dev *dev, int vec)1048{1049 return &dev->eqs[vec];1050}1051 1052static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,1053 struct efa_ibv_create_cq_resp *resp,1054 bool db_valid)1055{1056 resp->q_mmap_size = cq->size;1057 cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,1058 virt_to_phys(cq->cpu_addr),1059 cq->size, EFA_MMAP_DMA_PAGE,1060 &resp->q_mmap_key);1061 if (!cq->mmap_entry)1062 return -ENOMEM;1063 1064 if (db_valid) {1065 cq->db_mmap_entry =1066 efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,1067 dev->db_bar_addr + resp->db_off,1068 PAGE_SIZE, EFA_MMAP_IO_NC,1069 &resp->db_mmap_key);1070 if (!cq->db_mmap_entry) {1071 rdma_user_mmap_entry_remove(cq->mmap_entry);1072 return -ENOMEM;1073 }1074 1075 resp->db_off &= ~PAGE_MASK;1076 resp->comp_mask |= EFA_CREATE_CQ_RESP_DB_OFF;1077 }1078 1079 return 0;1080}1081 1082int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,1083 struct uverbs_attr_bundle *attrs)1084{1085 struct ib_udata *udata = &attrs->driver_udata;1086 struct efa_ucontext *ucontext = rdma_udata_to_drv_context(1087 udata, struct efa_ucontext, ibucontext);1088 struct efa_com_create_cq_params params = {};1089 struct efa_ibv_create_cq_resp resp = {};1090 struct efa_com_create_cq_result result;1091 struct ib_device *ibdev = ibcq->device;1092 struct efa_dev *dev = to_edev(ibdev);1093 struct efa_ibv_create_cq cmd = {};1094 struct efa_cq *cq = to_ecq(ibcq);1095 int entries = attr->cqe;1096 bool set_src_addr;1097 int err;1098 1099 ibdev_dbg(ibdev, "create_cq entries %d\n", entries);1100 1101 if (attr->flags)1102 return -EOPNOTSUPP;1103 1104 if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {1105 ibdev_dbg(ibdev,1106 "cq: requested entries[%u] non-positive or greater than max[%u]\n",1107 entries, dev->dev_attr.max_cq_depth);1108 err = -EINVAL;1109 goto err_out;1110 }1111 1112 if (offsetofend(typeof(cmd), num_sub_cqs) > udata->inlen) {1113 ibdev_dbg(ibdev,1114 "Incompatible ABI params, no input udata\n");1115 err = -EINVAL;1116 goto err_out;1117 }1118 1119 if (udata->inlen > sizeof(cmd) &&1120 !ib_is_udata_cleared(udata, sizeof(cmd),1121 udata->inlen - sizeof(cmd))) {1122 ibdev_dbg(ibdev,1123 "Incompatible ABI params, unknown fields in udata\n");1124 err = -EINVAL;1125 goto err_out;1126 }1127 1128 err = ib_copy_from_udata(&cmd, udata,1129 min(sizeof(cmd), udata->inlen));1130 if (err) {1131 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");1132 goto err_out;1133 }1134 1135 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_58)) {1136 ibdev_dbg(ibdev,1137 "Incompatible ABI params, unknown fields in udata\n");1138 err = -EINVAL;1139 goto err_out;1140 }1141 1142 set_src_addr = !!(cmd.flags & EFA_CREATE_CQ_WITH_SGID);1143 if ((cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc_ex)) &&1144 (set_src_addr ||1145 cmd.cq_entry_size != sizeof(struct efa_io_rx_cdesc))) {1146 ibdev_dbg(ibdev,1147 "Invalid entry size [%u]\n", cmd.cq_entry_size);1148 err = -EINVAL;1149 goto err_out;1150 }1151 1152 if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {1153 ibdev_dbg(ibdev,1154 "Invalid number of sub cqs[%u] expected[%u]\n",1155 cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);1156 err = -EINVAL;1157 goto err_out;1158 }1159 1160 cq->ucontext = ucontext;1161 cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);1162 cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,1163 DMA_FROM_DEVICE);1164 if (!cq->cpu_addr) {1165 err = -ENOMEM;1166 goto err_out;1167 }1168 1169 params.uarn = cq->ucontext->uarn;1170 params.cq_depth = entries;1171 params.dma_addr = cq->dma_addr;1172 params.entry_size_in_bytes = cmd.cq_entry_size;1173 params.num_sub_cqs = cmd.num_sub_cqs;1174 params.set_src_addr = set_src_addr;1175 if (cmd.flags & EFA_CREATE_CQ_WITH_COMPLETION_CHANNEL) {1176 cq->eq = efa_vec2eq(dev, attr->comp_vector);1177 params.eqn = cq->eq->eeq.eqn;1178 params.interrupt_mode_enabled = true;1179 }1180 1181 err = efa_com_create_cq(&dev->edev, ¶ms, &result);1182 if (err)1183 goto err_free_mapped;1184 1185 resp.db_off = result.db_off;1186 resp.cq_idx = result.cq_idx;1187 cq->cq_idx = result.cq_idx;1188 cq->ibcq.cqe = result.actual_depth;1189 WARN_ON_ONCE(entries != result.actual_depth);1190 1191 err = cq_mmap_entries_setup(dev, cq, &resp, result.db_valid);1192 if (err) {1193 ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n",1194 cq->cq_idx);1195 goto err_destroy_cq;1196 }1197 1198 if (cq->eq) {1199 err = xa_err(xa_store(&dev->cqs_xa, cq->cq_idx, cq, GFP_KERNEL));1200 if (err) {1201 ibdev_dbg(ibdev, "Failed to store cq[%u] in xarray\n",1202 cq->cq_idx);1203 goto err_remove_mmap;1204 }1205 }1206 1207 if (udata->outlen) {1208 err = ib_copy_to_udata(udata, &resp,1209 min(sizeof(resp), udata->outlen));1210 if (err) {1211 ibdev_dbg(ibdev,1212 "Failed to copy udata for create_cq\n");1213 goto err_xa_erase;1214 }1215 }1216 1217 ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",1218 cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);1219 1220 return 0;1221 1222err_xa_erase:1223 if (cq->eq)1224 xa_erase(&dev->cqs_xa, cq->cq_idx);1225err_remove_mmap:1226 efa_cq_user_mmap_entries_remove(cq);1227err_destroy_cq:1228 efa_destroy_cq_idx(dev, cq->cq_idx);1229err_free_mapped:1230 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,1231 DMA_FROM_DEVICE);1232 1233err_out:1234 atomic64_inc(&dev->stats.create_cq_err);1235 return err;1236}1237 1238static int umem_to_page_list(struct efa_dev *dev,1239 struct ib_umem *umem,1240 u64 *page_list,1241 u32 hp_cnt,1242 u8 hp_shift)1243{1244 u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);1245 struct ib_block_iter biter;1246 unsigned int hp_idx = 0;1247 1248 ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",1249 hp_cnt, pages_in_hp);1250 1251 rdma_umem_for_each_dma_block(umem, &biter, BIT(hp_shift))1252 page_list[hp_idx++] = rdma_block_iter_dma_address(&biter);1253 1254 return 0;1255}1256 1257static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)1258{1259 struct scatterlist *sglist;1260 struct page *pg;1261 int i;1262 1263 sglist = kmalloc_array(page_cnt, sizeof(*sglist), GFP_KERNEL);1264 if (!sglist)1265 return NULL;1266 sg_init_table(sglist, page_cnt);1267 for (i = 0; i < page_cnt; i++) {1268 pg = vmalloc_to_page(buf);1269 if (!pg)1270 goto err;1271 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);1272 buf += PAGE_SIZE / sizeof(*buf);1273 }1274 return sglist;1275 1276err:1277 kfree(sglist);1278 return NULL;1279}1280 1281/*1282 * create a chunk list of physical pages dma addresses from the supplied1283 * scatter gather list1284 */1285static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)1286{1287 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;1288 int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;1289 struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;1290 unsigned int chunk_list_size, chunk_idx, payload_idx;1291 int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;1292 struct efa_com_ctrl_buff_info *ctrl_buf;1293 u64 *cur_chunk_buf, *prev_chunk_buf;1294 struct ib_block_iter biter;1295 dma_addr_t dma_addr;1296 int i;1297 1298 /* allocate a chunk list that consists of 4KB chunks */1299 chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);1300 1301 chunk_list->size = chunk_list_size;1302 chunk_list->chunks = kcalloc(chunk_list_size,1303 sizeof(*chunk_list->chunks),1304 GFP_KERNEL);1305 if (!chunk_list->chunks)1306 return -ENOMEM;1307 1308 ibdev_dbg(&dev->ibdev,1309 "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,1310 page_cnt);1311 1312 /* allocate chunk buffers: */1313 for (i = 0; i < chunk_list_size; i++) {1314 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);1315 if (!chunk_list->chunks[i].buf)1316 goto chunk_list_dealloc;1317 1318 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;1319 }1320 chunk_list->chunks[chunk_list_size - 1].length =1321 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +1322 EFA_CHUNK_PTR_SIZE;1323 1324 /* fill the dma addresses of sg list pages to chunks: */1325 chunk_idx = 0;1326 payload_idx = 0;1327 cur_chunk_buf = chunk_list->chunks[0].buf;1328 rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt,1329 EFA_CHUNK_PAYLOAD_SIZE) {1330 cur_chunk_buf[payload_idx++] =1331 rdma_block_iter_dma_address(&biter);1332 1333 if (payload_idx == EFA_PTRS_PER_CHUNK) {1334 chunk_idx++;1335 cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;1336 payload_idx = 0;1337 }1338 }1339 1340 /* map chunks to dma and fill chunks next ptrs */1341 for (i = chunk_list_size - 1; i >= 0; i--) {1342 dma_addr = dma_map_single(&dev->pdev->dev,1343 chunk_list->chunks[i].buf,1344 chunk_list->chunks[i].length,1345 DMA_TO_DEVICE);1346 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {1347 ibdev_err(&dev->ibdev,1348 "chunk[%u] dma_map_failed\n", i);1349 goto chunk_list_unmap;1350 }1351 1352 chunk_list->chunks[i].dma_addr = dma_addr;1353 ibdev_dbg(&dev->ibdev,1354 "chunk[%u] mapped at [%pad]\n", i, &dma_addr);1355 1356 if (!i)1357 break;1358 1359 prev_chunk_buf = chunk_list->chunks[i - 1].buf;1360 1361 ctrl_buf = (struct efa_com_ctrl_buff_info *)1362 &prev_chunk_buf[EFA_PTRS_PER_CHUNK];1363 ctrl_buf->length = chunk_list->chunks[i].length;1364 1365 efa_com_set_dma_addr(dma_addr,1366 &ctrl_buf->address.mem_addr_high,1367 &ctrl_buf->address.mem_addr_low);1368 }1369 1370 return 0;1371 1372chunk_list_unmap:1373 for (; i < chunk_list_size; i++) {1374 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,1375 chunk_list->chunks[i].length, DMA_TO_DEVICE);1376 }1377chunk_list_dealloc:1378 for (i = 0; i < chunk_list_size; i++)1379 kfree(chunk_list->chunks[i].buf);1380 1381 kfree(chunk_list->chunks);1382 return -ENOMEM;1383}1384 1385static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)1386{1387 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;1388 int i;1389 1390 for (i = 0; i < chunk_list->size; i++) {1391 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,1392 chunk_list->chunks[i].length, DMA_TO_DEVICE);1393 kfree(chunk_list->chunks[i].buf);1394 }1395 1396 kfree(chunk_list->chunks);1397}1398 1399/* initialize pbl continuous mode: map pbl buffer to a dma address. */1400static int pbl_continuous_initialize(struct efa_dev *dev,1401 struct pbl_context *pbl)1402{1403 dma_addr_t dma_addr;1404 1405 dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,1406 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);1407 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {1408 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");1409 return -ENOMEM;1410 }1411 1412 pbl->phys.continuous.dma_addr = dma_addr;1413 ibdev_dbg(&dev->ibdev,1414 "pbl continuous - dma_addr = %pad, size[%u]\n",1415 &dma_addr, pbl->pbl_buf_size_in_bytes);1416 1417 return 0;1418}1419 1420/*1421 * initialize pbl indirect mode:1422 * create a chunk list out of the dma addresses of the physical pages of1423 * pbl buffer.1424 */1425static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)1426{1427 u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, EFA_CHUNK_PAYLOAD_SIZE);1428 struct scatterlist *sgl;1429 int sg_dma_cnt, err;1430 1431 BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);1432 sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);1433 if (!sgl)1434 return -ENOMEM;1435 1436 sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);1437 if (!sg_dma_cnt) {1438 err = -EINVAL;1439 goto err_map;1440 }1441 1442 pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;1443 pbl->phys.indirect.sgl = sgl;1444 pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;1445 err = pbl_chunk_list_create(dev, pbl);1446 if (err) {1447 ibdev_dbg(&dev->ibdev,1448 "chunk_list creation failed[%d]\n", err);1449 goto err_chunk;1450 }1451 1452 ibdev_dbg(&dev->ibdev,1453 "pbl indirect - size[%u], chunks[%u]\n",1454 pbl->pbl_buf_size_in_bytes,1455 pbl->phys.indirect.chunk_list.size);1456 1457 return 0;1458 1459err_chunk:1460 dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);1461err_map:1462 kfree(sgl);1463 return err;1464}1465 1466static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)1467{1468 pbl_chunk_list_destroy(dev, pbl);1469 dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,1470 pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);1471 kfree(pbl->phys.indirect.sgl);1472}1473 1474/* create a page buffer list from a mapped user memory region */1475static int pbl_create(struct efa_dev *dev,1476 struct pbl_context *pbl,1477 struct ib_umem *umem,1478 int hp_cnt,1479 u8 hp_shift)1480{1481 int err;1482 1483 pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;1484 pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL);1485 if (!pbl->pbl_buf)1486 return -ENOMEM;1487 1488 if (is_vmalloc_addr(pbl->pbl_buf)) {1489 pbl->physically_continuous = 0;1490 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,1491 hp_shift);1492 if (err)1493 goto err_free;1494 1495 err = pbl_indirect_initialize(dev, pbl);1496 if (err)1497 goto err_free;1498 } else {1499 pbl->physically_continuous = 1;1500 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,1501 hp_shift);1502 if (err)1503 goto err_free;1504 1505 err = pbl_continuous_initialize(dev, pbl);1506 if (err)1507 goto err_free;1508 }1509 1510 ibdev_dbg(&dev->ibdev,1511 "user_pbl_created: user_pages[%u], continuous[%u]\n",1512 hp_cnt, pbl->physically_continuous);1513 1514 return 0;1515 1516err_free:1517 kvfree(pbl->pbl_buf);1518 return err;1519}1520 1521static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)1522{1523 if (pbl->physically_continuous)1524 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,1525 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);1526 else1527 pbl_indirect_terminate(dev, pbl);1528 1529 kvfree(pbl->pbl_buf);1530}1531 1532static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,1533 struct efa_com_reg_mr_params *params)1534{1535 int err;1536 1537 params->inline_pbl = 1;1538 err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,1539 params->page_num, params->page_shift);1540 if (err)1541 return err;1542 1543 ibdev_dbg(&dev->ibdev,1544 "inline_pbl_array - pages[%u]\n", params->page_num);1545 1546 return 0;1547}1548 1549static int efa_create_pbl(struct efa_dev *dev,1550 struct pbl_context *pbl,1551 struct efa_mr *mr,1552 struct efa_com_reg_mr_params *params)1553{1554 int err;1555 1556 err = pbl_create(dev, pbl, mr->umem, params->page_num,1557 params->page_shift);1558 if (err) {1559 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);1560 return err;1561 }1562 1563 params->inline_pbl = 0;1564 params->indirect = !pbl->physically_continuous;1565 if (pbl->physically_continuous) {1566 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;1567 1568 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,1569 ¶ms->pbl.pbl.address.mem_addr_high,1570 ¶ms->pbl.pbl.address.mem_addr_low);1571 } else {1572 params->pbl.pbl.length =1573 pbl->phys.indirect.chunk_list.chunks[0].length;1574 1575 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,1576 ¶ms->pbl.pbl.address.mem_addr_high,1577 ¶ms->pbl.pbl.address.mem_addr_low);1578 }1579 1580 return 0;1581}1582 1583static struct efa_mr *efa_alloc_mr(struct ib_pd *ibpd, int access_flags,1584 struct ib_udata *udata)1585{1586 struct efa_dev *dev = to_edev(ibpd->device);1587 int supp_access_flags;1588 struct efa_mr *mr;1589 1590 if (udata && udata->inlen &&1591 !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {1592 ibdev_dbg(&dev->ibdev,1593 "Incompatible ABI params, udata not cleared\n");1594 return ERR_PTR(-EINVAL);1595 }1596 1597 supp_access_flags =1598 IB_ACCESS_LOCAL_WRITE |1599 (EFA_DEV_CAP(dev, RDMA_READ) ? IB_ACCESS_REMOTE_READ : 0) |1600 (EFA_DEV_CAP(dev, RDMA_WRITE) ? IB_ACCESS_REMOTE_WRITE : 0);1601 1602 access_flags &= ~IB_ACCESS_OPTIONAL;1603 if (access_flags & ~supp_access_flags) {1604 ibdev_dbg(&dev->ibdev,1605 "Unsupported access flags[%#x], supported[%#x]\n",1606 access_flags, supp_access_flags);1607 return ERR_PTR(-EOPNOTSUPP);1608 }1609 1610 mr = kzalloc(sizeof(*mr), GFP_KERNEL);1611 if (!mr)1612 return ERR_PTR(-ENOMEM);1613 1614 return mr;1615}1616 1617static int efa_register_mr(struct ib_pd *ibpd, struct efa_mr *mr, u64 start,1618 u64 length, u64 virt_addr, int access_flags)1619{1620 struct efa_dev *dev = to_edev(ibpd->device);1621 struct efa_com_reg_mr_params params = {};1622 struct efa_com_reg_mr_result result = {};1623 struct pbl_context pbl;1624 unsigned int pg_sz;1625 int inline_size;1626 int err;1627 1628 params.pd = to_epd(ibpd)->pdn;1629 params.iova = virt_addr;1630 params.mr_length_in_bytes = length;1631 params.permissions = access_flags;1632 1633 pg_sz = ib_umem_find_best_pgsz(mr->umem,1634 dev->dev_attr.page_size_cap,1635 virt_addr);1636 if (!pg_sz) {1637 ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n",1638 dev->dev_attr.page_size_cap);1639 return -EOPNOTSUPP;1640 }1641 1642 params.page_shift = order_base_2(pg_sz);1643 params.page_num = ib_umem_num_dma_blocks(mr->umem, pg_sz);1644 1645 ibdev_dbg(&dev->ibdev,1646 "start %#llx length %#llx params.page_shift %u params.page_num %u\n",1647 start, length, params.page_shift, params.page_num);1648 1649 inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);1650 if (params.page_num <= inline_size) {1651 err = efa_create_inline_pbl(dev, mr, ¶ms);1652 if (err)1653 return err;1654 1655 err = efa_com_register_mr(&dev->edev, ¶ms, &result);1656 if (err)1657 return err;1658 } else {1659 err = efa_create_pbl(dev, &pbl, mr, ¶ms);1660 if (err)1661 return err;1662 1663 err = efa_com_register_mr(&dev->edev, ¶ms, &result);1664 pbl_destroy(dev, &pbl);1665 1666 if (err)1667 return err;1668 }1669 1670 mr->ibmr.lkey = result.l_key;1671 mr->ibmr.rkey = result.r_key;1672 mr->ibmr.length = length;1673 mr->ic_info.recv_ic_id = result.ic_info.recv_ic_id;1674 mr->ic_info.rdma_read_ic_id = result.ic_info.rdma_read_ic_id;1675 mr->ic_info.rdma_recv_ic_id = result.ic_info.rdma_recv_ic_id;1676 mr->ic_info.recv_ic_id_valid = result.ic_info.recv_ic_id_valid;1677 mr->ic_info.rdma_read_ic_id_valid = result.ic_info.rdma_read_ic_id_valid;1678 mr->ic_info.rdma_recv_ic_id_valid = result.ic_info.rdma_recv_ic_id_valid;1679 ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);1680 1681 return 0;1682}1683 1684struct ib_mr *efa_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start,1685 u64 length, u64 virt_addr,1686 int fd, int access_flags,1687 struct uverbs_attr_bundle *attrs)1688{1689 struct efa_dev *dev = to_edev(ibpd->device);1690 struct ib_umem_dmabuf *umem_dmabuf;1691 struct efa_mr *mr;1692 int err;1693 1694 mr = efa_alloc_mr(ibpd, access_flags, &attrs->driver_udata);1695 if (IS_ERR(mr)) {1696 err = PTR_ERR(mr);1697 goto err_out;1698 }1699 1700 umem_dmabuf = ib_umem_dmabuf_get_pinned(ibpd->device, start, length, fd,1701 access_flags);1702 if (IS_ERR(umem_dmabuf)) {1703 err = PTR_ERR(umem_dmabuf);1704 ibdev_dbg(&dev->ibdev, "Failed to get dmabuf umem[%d]\n", err);1705 goto err_free;1706 }1707 1708 mr->umem = &umem_dmabuf->umem;1709 err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);1710 if (err)1711 goto err_release;1712 1713 return &mr->ibmr;1714 1715err_release:1716 ib_umem_release(mr->umem);1717err_free:1718 kfree(mr);1719err_out:1720 atomic64_inc(&dev->stats.reg_mr_err);1721 return ERR_PTR(err);1722}1723 1724struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,1725 u64 virt_addr, int access_flags,1726 struct ib_udata *udata)1727{1728 struct efa_dev *dev = to_edev(ibpd->device);1729 struct efa_mr *mr;1730 int err;1731 1732 mr = efa_alloc_mr(ibpd, access_flags, udata);1733 if (IS_ERR(mr)) {1734 err = PTR_ERR(mr);1735 goto err_out;1736 }1737 1738 mr->umem = ib_umem_get(ibpd->device, start, length, access_flags);1739 if (IS_ERR(mr->umem)) {1740 err = PTR_ERR(mr->umem);1741 ibdev_dbg(&dev->ibdev,1742 "Failed to pin and map user space memory[%d]\n", err);1743 goto err_free;1744 }1745 1746 err = efa_register_mr(ibpd, mr, start, length, virt_addr, access_flags);1747 if (err)1748 goto err_release;1749 1750 return &mr->ibmr;1751 1752err_release:1753 ib_umem_release(mr->umem);1754err_free:1755 kfree(mr);1756err_out:1757 atomic64_inc(&dev->stats.reg_mr_err);1758 return ERR_PTR(err);1759}1760 1761static int UVERBS_HANDLER(EFA_IB_METHOD_MR_QUERY)(struct uverbs_attr_bundle *attrs)1762{1763 struct ib_mr *ibmr = uverbs_attr_get_obj(attrs, EFA_IB_ATTR_QUERY_MR_HANDLE);1764 struct efa_mr *mr = to_emr(ibmr);1765 u16 ic_id_validity = 0;1766 int ret;1767 1768 ret = uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_RECV_IC_ID,1769 &mr->ic_info.recv_ic_id, sizeof(mr->ic_info.recv_ic_id));1770 if (ret)1771 return ret;1772 1773 ret = uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_RDMA_READ_IC_ID,1774 &mr->ic_info.rdma_read_ic_id, sizeof(mr->ic_info.rdma_read_ic_id));1775 if (ret)1776 return ret;1777 1778 ret = uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_RDMA_RECV_IC_ID,1779 &mr->ic_info.rdma_recv_ic_id, sizeof(mr->ic_info.rdma_recv_ic_id));1780 if (ret)1781 return ret;1782 1783 if (mr->ic_info.recv_ic_id_valid)1784 ic_id_validity |= EFA_QUERY_MR_VALIDITY_RECV_IC_ID;1785 if (mr->ic_info.rdma_read_ic_id_valid)1786 ic_id_validity |= EFA_QUERY_MR_VALIDITY_RDMA_READ_IC_ID;1787 if (mr->ic_info.rdma_recv_ic_id_valid)1788 ic_id_validity |= EFA_QUERY_MR_VALIDITY_RDMA_RECV_IC_ID;1789 1790 return uverbs_copy_to(attrs, EFA_IB_ATTR_QUERY_MR_RESP_IC_ID_VALIDITY,1791 &ic_id_validity, sizeof(ic_id_validity));1792}1793 1794int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)1795{1796 struct efa_dev *dev = to_edev(ibmr->device);1797 struct efa_com_dereg_mr_params params;1798 struct efa_mr *mr = to_emr(ibmr);1799 int err;1800 1801 ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);1802 1803 params.l_key = mr->ibmr.lkey;1804 err = efa_com_dereg_mr(&dev->edev, ¶ms);1805 if (err)1806 return err;1807 1808 ib_umem_release(mr->umem);1809 kfree(mr);1810 1811 return 0;1812}1813 1814int efa_get_port_immutable(struct ib_device *ibdev, u32 port_num,1815 struct ib_port_immutable *immutable)1816{1817 struct ib_port_attr attr;1818 int err;1819 1820 err = ib_query_port(ibdev, port_num, &attr);1821 if (err) {1822 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);1823 return err;1824 }1825 1826 immutable->pkey_tbl_len = attr.pkey_tbl_len;1827 immutable->gid_tbl_len = attr.gid_tbl_len;1828 1829 return 0;1830}1831 1832static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)1833{1834 struct efa_com_dealloc_uar_params params = {1835 .uarn = uarn,1836 };1837 1838 return efa_com_dealloc_uar(&dev->edev, ¶ms);1839}1840 1841#define EFA_CHECK_USER_COMP(_dev, _comp_mask, _attr, _mask, _attr_str) \1842 (_attr_str = (!(_dev)->dev_attr._attr || ((_comp_mask) & (_mask))) ? \1843 NULL : #_attr)1844 1845static int efa_user_comp_handshake(const struct ib_ucontext *ibucontext,1846 const struct efa_ibv_alloc_ucontext_cmd *cmd)1847{1848 struct efa_dev *dev = to_edev(ibucontext->device);1849 char *attr_str;1850 1851 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, max_tx_batch,1852 EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH, attr_str))1853 goto err;1854 1855 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, min_sq_depth,1856 EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR,1857 attr_str))1858 goto err;1859 1860 return 0;1861 1862err:1863 ibdev_dbg(&dev->ibdev, "Userspace handshake failed for %s attribute\n",1864 attr_str);1865 return -EOPNOTSUPP;1866}1867 1868int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)1869{1870 struct efa_ucontext *ucontext = to_eucontext(ibucontext);1871 struct efa_dev *dev = to_edev(ibucontext->device);1872 struct efa_ibv_alloc_ucontext_resp resp = {};1873 struct efa_ibv_alloc_ucontext_cmd cmd = {};1874 struct efa_com_alloc_uar_result result;1875 int err;1876 1877 /*1878 * it's fine if the driver does not know all request fields,1879 * we will ack input fields in our response.1880 */1881 1882 err = ib_copy_from_udata(&cmd, udata,1883 min(sizeof(cmd), udata->inlen));1884 if (err) {1885 ibdev_dbg(&dev->ibdev,1886 "Cannot copy udata for alloc_ucontext\n");1887 goto err_out;1888 }1889 1890 err = efa_user_comp_handshake(ibucontext, &cmd);1891 if (err)1892 goto err_out;1893 1894 err = efa_com_alloc_uar(&dev->edev, &result);1895 if (err)1896 goto err_out;1897 1898 ucontext->uarn = result.uarn;1899 1900 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;1901 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;1902 resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;1903 resp.inline_buf_size = dev->dev_attr.inline_buf_size;1904 resp.max_llq_size = dev->dev_attr.max_llq_size;1905 resp.max_tx_batch = dev->dev_attr.max_tx_batch;1906 resp.min_sq_wr = dev->dev_attr.min_sq_depth;1907 1908 err = ib_copy_to_udata(udata, &resp,1909 min(sizeof(resp), udata->outlen));1910 if (err)1911 goto err_dealloc_uar;1912 1913 return 0;1914 1915err_dealloc_uar:1916 efa_dealloc_uar(dev, result.uarn);1917err_out:1918 atomic64_inc(&dev->stats.alloc_ucontext_err);1919 return err;1920}1921 1922void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)1923{1924 struct efa_ucontext *ucontext = to_eucontext(ibucontext);1925 struct efa_dev *dev = to_edev(ibucontext->device);1926 1927 efa_dealloc_uar(dev, ucontext->uarn);1928}1929 1930void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry)1931{1932 struct efa_user_mmap_entry *entry = to_emmap(rdma_entry);1933 1934 kfree(entry);1935}1936 1937static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,1938 struct vm_area_struct *vma)1939{1940 struct rdma_user_mmap_entry *rdma_entry;1941 struct efa_user_mmap_entry *entry;1942 unsigned long va;1943 int err = 0;1944 u64 pfn;1945 1946 rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma);1947 if (!rdma_entry) {1948 ibdev_dbg(&dev->ibdev,1949 "pgoff[%#lx] does not have valid entry\n",1950 vma->vm_pgoff);1951 atomic64_inc(&dev->stats.mmap_err);1952 return -EINVAL;1953 }1954 entry = to_emmap(rdma_entry);1955 1956 ibdev_dbg(&dev->ibdev,1957 "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n",1958 entry->address, rdma_entry->npages * PAGE_SIZE,1959 entry->mmap_flag);1960 1961 pfn = entry->address >> PAGE_SHIFT;1962 switch (entry->mmap_flag) {1963 case EFA_MMAP_IO_NC:1964 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,1965 entry->rdma_entry.npages * PAGE_SIZE,1966 pgprot_noncached(vma->vm_page_prot),1967 rdma_entry);1968 break;1969 case EFA_MMAP_IO_WC:1970 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,1971 entry->rdma_entry.npages * PAGE_SIZE,1972 pgprot_writecombine(vma->vm_page_prot),1973 rdma_entry);1974 break;1975 case EFA_MMAP_DMA_PAGE:1976 for (va = vma->vm_start; va < vma->vm_end;1977 va += PAGE_SIZE, pfn++) {1978 err = vm_insert_page(vma, va, pfn_to_page(pfn));1979 if (err)1980 break;1981 }1982 break;1983 default:1984 err = -EINVAL;1985 }1986 1987 if (err) {1988 ibdev_dbg(1989 &dev->ibdev,1990 "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n",1991 entry->address, rdma_entry->npages * PAGE_SIZE,1992 entry->mmap_flag, err);1993 atomic64_inc(&dev->stats.mmap_err);1994 }1995 1996 rdma_user_mmap_entry_put(rdma_entry);1997 return err;1998}1999 2000int efa_mmap(struct ib_ucontext *ibucontext,2001 struct vm_area_struct *vma)2002{2003 struct efa_ucontext *ucontext = to_eucontext(ibucontext);2004 struct efa_dev *dev = to_edev(ibucontext->device);2005 size_t length = vma->vm_end - vma->vm_start;2006 2007 ibdev_dbg(&dev->ibdev,2008 "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n",2009 vma->vm_start, vma->vm_end, length, vma->vm_pgoff);2010 2011 return __efa_mmap(dev, ucontext, vma);2012}2013 2014static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)2015{2016 struct efa_com_destroy_ah_params params = {2017 .ah = ah->ah,2018 .pdn = to_epd(ah->ibah.pd)->pdn,2019 };2020 2021 return efa_com_destroy_ah(&dev->edev, ¶ms);2022}2023 2024int efa_create_ah(struct ib_ah *ibah,2025 struct rdma_ah_init_attr *init_attr,2026 struct ib_udata *udata)2027{2028 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;2029 struct efa_dev *dev = to_edev(ibah->device);2030 struct efa_com_create_ah_params params = {};2031 struct efa_ibv_create_ah_resp resp = {};2032 struct efa_com_create_ah_result result;2033 struct efa_ah *ah = to_eah(ibah);2034 int err;2035 2036 if (!(init_attr->flags & RDMA_CREATE_AH_SLEEPABLE)) {2037 ibdev_dbg(&dev->ibdev,2038 "Create address handle is not supported in atomic context\n");2039 err = -EOPNOTSUPP;2040 goto err_out;2041 }2042 2043 if (udata->inlen &&2044 !ib_is_udata_cleared(udata, 0, udata->inlen)) {2045 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");2046 err = -EINVAL;2047 goto err_out;2048 }2049 2050 memcpy(params.dest_addr, ah_attr->grh.dgid.raw,2051 sizeof(params.dest_addr));2052 params.pdn = to_epd(ibah->pd)->pdn;2053 err = efa_com_create_ah(&dev->edev, ¶ms, &result);2054 if (err)2055 goto err_out;2056 2057 memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));2058 ah->ah = result.ah;2059 2060 resp.efa_address_handle = result.ah;2061 2062 if (udata->outlen) {2063 err = ib_copy_to_udata(udata, &resp,2064 min(sizeof(resp), udata->outlen));2065 if (err) {2066 ibdev_dbg(&dev->ibdev,2067 "Failed to copy udata for create_ah response\n");2068 goto err_destroy_ah;2069 }2070 }2071 ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);2072 2073 return 0;2074 2075err_destroy_ah:2076 efa_ah_destroy(dev, ah);2077err_out:2078 atomic64_inc(&dev->stats.create_ah_err);2079 return err;2080}2081 2082int efa_destroy_ah(struct ib_ah *ibah, u32 flags)2083{2084 struct efa_dev *dev = to_edev(ibah->pd->device);2085 struct efa_ah *ah = to_eah(ibah);2086 2087 ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);2088 2089 if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {2090 ibdev_dbg(&dev->ibdev,2091 "Destroy address handle is not supported in atomic context\n");2092 return -EOPNOTSUPP;2093 }2094 2095 efa_ah_destroy(dev, ah);2096 return 0;2097}2098 2099struct rdma_hw_stats *efa_alloc_hw_port_stats(struct ib_device *ibdev,2100 u32 port_num)2101{2102 return rdma_alloc_hw_stats_struct(efa_port_stats_descs,2103 ARRAY_SIZE(efa_port_stats_descs),2104 RDMA_HW_STATS_DEFAULT_LIFESPAN);2105}2106 2107struct rdma_hw_stats *efa_alloc_hw_device_stats(struct ib_device *ibdev)2108{2109 return rdma_alloc_hw_stats_struct(efa_device_stats_descs,2110 ARRAY_SIZE(efa_device_stats_descs),2111 RDMA_HW_STATS_DEFAULT_LIFESPAN);2112}2113 2114static int efa_fill_device_stats(struct efa_dev *dev,2115 struct rdma_hw_stats *stats)2116{2117 struct efa_com_stats_admin *as = &dev->edev.aq.stats;2118 struct efa_stats *s = &dev->stats;2119 2120 stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd);2121 stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd);2122 stats->value[EFA_CMDS_ERR] = atomic64_read(&as->cmd_err);2123 stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion);2124 2125 stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd);2126 stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->alloc_pd_err);2127 stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->create_qp_err);2128 stats->value[EFA_CREATE_CQ_ERR] = atomic64_read(&s->create_cq_err);2129 stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->reg_mr_err);2130 stats->value[EFA_ALLOC_UCONTEXT_ERR] =2131 atomic64_read(&s->alloc_ucontext_err);2132 stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->create_ah_err);2133 stats->value[EFA_MMAP_ERR] = atomic64_read(&s->mmap_err);2134 2135 return ARRAY_SIZE(efa_device_stats_descs);2136}2137 2138static int efa_fill_port_stats(struct efa_dev *dev, struct rdma_hw_stats *stats,2139 u32 port_num)2140{2141 struct efa_com_get_stats_params params = {};2142 union efa_com_get_stats_result result;2143 struct efa_com_rdma_write_stats *rws;2144 struct efa_com_rdma_read_stats *rrs;2145 struct efa_com_messages_stats *ms;2146 struct efa_com_basic_stats *bs;2147 int err;2148 2149 params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL;2150 params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC;2151 2152 err = efa_com_get_stats(&dev->edev, ¶ms, &result);2153 if (err)2154 return err;2155 2156 bs = &result.basic_stats;2157 stats->value[EFA_TX_BYTES] = bs->tx_bytes;2158 stats->value[EFA_TX_PKTS] = bs->tx_pkts;2159 stats->value[EFA_RX_BYTES] = bs->rx_bytes;2160 stats->value[EFA_RX_PKTS] = bs->rx_pkts;2161 stats->value[EFA_RX_DROPS] = bs->rx_drops;2162 2163 params.type = EFA_ADMIN_GET_STATS_TYPE_MESSAGES;2164 err = efa_com_get_stats(&dev->edev, ¶ms, &result);2165 if (err)2166 return err;2167 2168 ms = &result.messages_stats;2169 stats->value[EFA_SEND_BYTES] = ms->send_bytes;2170 stats->value[EFA_SEND_WRS] = ms->send_wrs;2171 stats->value[EFA_RECV_BYTES] = ms->recv_bytes;2172 stats->value[EFA_RECV_WRS] = ms->recv_wrs;2173 2174 params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_READ;2175 err = efa_com_get_stats(&dev->edev, ¶ms, &result);2176 if (err)2177 return err;2178 2179 rrs = &result.rdma_read_stats;2180 stats->value[EFA_RDMA_READ_WRS] = rrs->read_wrs;2181 stats->value[EFA_RDMA_READ_BYTES] = rrs->read_bytes;2182 stats->value[EFA_RDMA_READ_WR_ERR] = rrs->read_wr_err;2183 stats->value[EFA_RDMA_READ_RESP_BYTES] = rrs->read_resp_bytes;2184 2185 if (EFA_DEV_CAP(dev, RDMA_WRITE)) {2186 params.type = EFA_ADMIN_GET_STATS_TYPE_RDMA_WRITE;2187 err = efa_com_get_stats(&dev->edev, ¶ms, &result);2188 if (err)2189 return err;2190 2191 rws = &result.rdma_write_stats;2192 stats->value[EFA_RDMA_WRITE_WRS] = rws->write_wrs;2193 stats->value[EFA_RDMA_WRITE_BYTES] = rws->write_bytes;2194 stats->value[EFA_RDMA_WRITE_WR_ERR] = rws->write_wr_err;2195 stats->value[EFA_RDMA_WRITE_RECV_BYTES] = rws->write_recv_bytes;2196 }2197 2198 return ARRAY_SIZE(efa_port_stats_descs);2199}2200 2201int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,2202 u32 port_num, int index)2203{2204 if (port_num)2205 return efa_fill_port_stats(to_edev(ibdev), stats, port_num);2206 else2207 return efa_fill_device_stats(to_edev(ibdev), stats);2208}2209 2210enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,2211 u32 port_num)2212{2213 return IB_LINK_LAYER_UNSPECIFIED;2214}2215 2216DECLARE_UVERBS_NAMED_METHOD(EFA_IB_METHOD_MR_QUERY,2217 UVERBS_ATTR_IDR(EFA_IB_ATTR_QUERY_MR_HANDLE,2218 UVERBS_OBJECT_MR,2219 UVERBS_ACCESS_READ,2220 UA_MANDATORY),2221 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_IC_ID_VALIDITY,2222 UVERBS_ATTR_TYPE(u16),2223 UA_MANDATORY),2224 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_RECV_IC_ID,2225 UVERBS_ATTR_TYPE(u16),2226 UA_MANDATORY),2227 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_RDMA_READ_IC_ID,2228 UVERBS_ATTR_TYPE(u16),2229 UA_MANDATORY),2230 UVERBS_ATTR_PTR_OUT(EFA_IB_ATTR_QUERY_MR_RESP_RDMA_RECV_IC_ID,2231 UVERBS_ATTR_TYPE(u16),2232 UA_MANDATORY));2233 2234ADD_UVERBS_METHODS(efa_mr,2235 UVERBS_OBJECT_MR,2236 &UVERBS_METHOD(EFA_IB_METHOD_MR_QUERY));2237 2238const struct uapi_definition efa_uapi_defs[] = {2239 UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_MR,2240 &efa_mr),2241 {},2242};2243