1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
3 * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved.
6 #include <linux/vmalloc.h>
8 #include <rdma/ib_addr.h>
9 #include <rdma/ib_umem.h>
10 #include <rdma/ib_user_verbs.h>
11 #include <rdma/ib_verbs.h>
12 #include <rdma/uverbs_ioctl.h>
17 EFA_MMAP_DMA_PAGE = 0,
22 #define EFA_AENQ_ENABLED_GROUPS \
23 (BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
24 BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
26 struct efa_user_mmap_entry {
27 struct rdma_user_mmap_entry rdma_entry;
32 #define EFA_DEFINE_STATS(op) \
33 op(EFA_TX_BYTES, "tx_bytes") \
34 op(EFA_TX_PKTS, "tx_pkts") \
35 op(EFA_RX_BYTES, "rx_bytes") \
36 op(EFA_RX_PKTS, "rx_pkts") \
37 op(EFA_RX_DROPS, "rx_drops") \
38 op(EFA_SUBMITTED_CMDS, "submitted_cmds") \
39 op(EFA_COMPLETED_CMDS, "completed_cmds") \
40 op(EFA_NO_COMPLETION_CMDS, "no_completion_cmds") \
41 op(EFA_KEEP_ALIVE_RCVD, "keep_alive_rcvd") \
42 op(EFA_ALLOC_PD_ERR, "alloc_pd_err") \
43 op(EFA_CREATE_QP_ERR, "create_qp_err") \
44 op(EFA_REG_MR_ERR, "reg_mr_err") \
45 op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \
46 op(EFA_CREATE_AH_ERR, "create_ah_err")
48 #define EFA_STATS_ENUM(ename, name) ename,
49 #define EFA_STATS_STR(ename, name) [ename] = name,
52 EFA_DEFINE_STATS(EFA_STATS_ENUM)
55 static const char *const efa_stats_names[] = {
56 EFA_DEFINE_STATS(EFA_STATS_STR)
59 #define EFA_CHUNK_PAYLOAD_SHIFT 12
60 #define EFA_CHUNK_PAYLOAD_SIZE BIT(EFA_CHUNK_PAYLOAD_SHIFT)
61 #define EFA_CHUNK_PAYLOAD_PTR_SIZE 8
63 #define EFA_CHUNK_SHIFT 12
64 #define EFA_CHUNK_SIZE BIT(EFA_CHUNK_SHIFT)
65 #define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info)
67 #define EFA_PTRS_PER_CHUNK \
68 ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
70 #define EFA_CHUNK_USED_SIZE \
71 ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
79 struct pbl_chunk_list {
80 struct pbl_chunk *chunks;
90 u32 pbl_buf_size_in_pages;
91 struct scatterlist *sgl;
93 struct pbl_chunk_list chunk_list;
97 u32 pbl_buf_size_in_bytes;
98 u8 physically_continuous;
101 static inline struct efa_dev *to_edev(struct ib_device *ibdev)
103 return container_of(ibdev, struct efa_dev, ibdev);
106 static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
108 return container_of(ibucontext, struct efa_ucontext, ibucontext);
111 static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
113 return container_of(ibpd, struct efa_pd, ibpd);
116 static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
118 return container_of(ibmr, struct efa_mr, ibmr);
121 static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
123 return container_of(ibqp, struct efa_qp, ibqp);
126 static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
128 return container_of(ibcq, struct efa_cq, ibcq);
131 static inline struct efa_ah *to_eah(struct ib_ah *ibah)
133 return container_of(ibah, struct efa_ah, ibah);
136 static inline struct efa_user_mmap_entry *
137 to_emmap(struct rdma_user_mmap_entry *rdma_entry)
139 return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry);
142 static inline bool is_rdma_read_cap(struct efa_dev *dev)
144 return dev->dev_attr.device_caps & EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_RDMA_READ_MASK;
147 #define field_avail(x, fld, sz) (offsetof(typeof(x), fld) + \
148 sizeof_field(typeof(x), fld) <= (sz))
150 #define is_reserved_cleared(reserved) \
151 !memchr_inv(reserved, 0, sizeof(reserved))
153 static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
154 size_t size, enum dma_data_direction dir)
158 addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
162 *dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);
163 if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {
164 ibdev_err(&dev->ibdev, "Failed to map DMA address\n");
165 free_pages_exact(addr, size);
172 int efa_query_device(struct ib_device *ibdev,
173 struct ib_device_attr *props,
174 struct ib_udata *udata)
176 struct efa_com_get_device_attr_result *dev_attr;
177 struct efa_ibv_ex_query_device_resp resp = {};
178 struct efa_dev *dev = to_edev(ibdev);
181 if (udata && udata->inlen &&
182 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
184 "Incompatible ABI params, udata not cleared\n");
188 dev_attr = &dev->dev_attr;
190 memset(props, 0, sizeof(*props));
191 props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
192 props->page_size_cap = dev_attr->page_size_cap;
193 props->vendor_id = dev->pdev->vendor;
194 props->vendor_part_id = dev->pdev->device;
195 props->hw_ver = dev->pdev->subsystem_device;
196 props->max_qp = dev_attr->max_qp;
197 props->max_cq = dev_attr->max_cq;
198 props->max_pd = dev_attr->max_pd;
199 props->max_mr = dev_attr->max_mr;
200 props->max_ah = dev_attr->max_ah;
201 props->max_cqe = dev_attr->max_cq_depth;
202 props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
203 dev_attr->max_rq_depth);
204 props->max_send_sge = dev_attr->max_sq_sge;
205 props->max_recv_sge = dev_attr->max_rq_sge;
206 props->max_sge_rd = dev_attr->max_wr_rdma_sge;
208 if (udata && udata->outlen) {
209 resp.max_sq_sge = dev_attr->max_sq_sge;
210 resp.max_rq_sge = dev_attr->max_rq_sge;
211 resp.max_sq_wr = dev_attr->max_sq_depth;
212 resp.max_rq_wr = dev_attr->max_rq_depth;
213 resp.max_rdma_size = dev_attr->max_rdma_size;
215 if (is_rdma_read_cap(dev))
216 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ;
218 err = ib_copy_to_udata(udata, &resp,
219 min(sizeof(resp), udata->outlen));
222 "Failed to copy udata for query_device\n");
230 int efa_query_port(struct ib_device *ibdev, u8 port,
231 struct ib_port_attr *props)
233 struct efa_dev *dev = to_edev(ibdev);
237 props->state = IB_PORT_ACTIVE;
238 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
239 props->gid_tbl_len = 1;
240 props->pkey_tbl_len = 1;
241 props->active_speed = IB_SPEED_EDR;
242 props->active_width = IB_WIDTH_4X;
243 props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
244 props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
245 props->max_msg_sz = dev->dev_attr.mtu;
246 props->max_vl_num = 1;
251 int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
253 struct ib_qp_init_attr *qp_init_attr)
255 struct efa_dev *dev = to_edev(ibqp->device);
256 struct efa_com_query_qp_params params = {};
257 struct efa_com_query_qp_result result;
258 struct efa_qp *qp = to_eqp(ibqp);
261 #define EFA_QUERY_QP_SUPP_MASK \
262 (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
263 IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP)
265 if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
266 ibdev_dbg(&dev->ibdev,
267 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
268 qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
272 memset(qp_attr, 0, sizeof(*qp_attr));
273 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
275 params.qp_handle = qp->qp_handle;
276 err = efa_com_query_qp(&dev->edev, ¶ms, &result);
280 qp_attr->qp_state = result.qp_state;
281 qp_attr->qkey = result.qkey;
282 qp_attr->sq_psn = result.sq_psn;
283 qp_attr->sq_draining = result.sq_draining;
284 qp_attr->port_num = 1;
286 qp_attr->cap.max_send_wr = qp->max_send_wr;
287 qp_attr->cap.max_recv_wr = qp->max_recv_wr;
288 qp_attr->cap.max_send_sge = qp->max_send_sge;
289 qp_attr->cap.max_recv_sge = qp->max_recv_sge;
290 qp_attr->cap.max_inline_data = qp->max_inline_data;
292 qp_init_attr->qp_type = ibqp->qp_type;
293 qp_init_attr->recv_cq = ibqp->recv_cq;
294 qp_init_attr->send_cq = ibqp->send_cq;
295 qp_init_attr->qp_context = ibqp->qp_context;
296 qp_init_attr->cap = qp_attr->cap;
301 int efa_query_gid(struct ib_device *ibdev, u8 port, int index,
304 struct efa_dev *dev = to_edev(ibdev);
306 memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr));
311 int efa_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
321 static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
323 struct efa_com_dealloc_pd_params params = {
327 return efa_com_dealloc_pd(&dev->edev, ¶ms);
330 int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
332 struct efa_dev *dev = to_edev(ibpd->device);
333 struct efa_ibv_alloc_pd_resp resp = {};
334 struct efa_com_alloc_pd_result result;
335 struct efa_pd *pd = to_epd(ibpd);
339 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
340 ibdev_dbg(&dev->ibdev,
341 "Incompatible ABI params, udata not cleared\n");
346 err = efa_com_alloc_pd(&dev->edev, &result);
350 pd->pdn = result.pdn;
351 resp.pdn = result.pdn;
354 err = ib_copy_to_udata(udata, &resp,
355 min(sizeof(resp), udata->outlen));
357 ibdev_dbg(&dev->ibdev,
358 "Failed to copy udata for alloc_pd\n");
363 ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
368 efa_pd_dealloc(dev, result.pdn);
370 atomic64_inc(&dev->stats.sw_stats.alloc_pd_err);
374 void efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
376 struct efa_dev *dev = to_edev(ibpd->device);
377 struct efa_pd *pd = to_epd(ibpd);
379 ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
380 efa_pd_dealloc(dev, pd->pdn);
383 static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
385 struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
387 return efa_com_destroy_qp(&dev->edev, ¶ms);
390 static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp)
392 rdma_user_mmap_entry_remove(qp->rq_mmap_entry);
393 rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry);
394 rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry);
395 rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry);
398 int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
400 struct efa_dev *dev = to_edev(ibqp->pd->device);
401 struct efa_qp *qp = to_eqp(ibqp);
404 ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
405 err = efa_destroy_qp_handle(dev, qp->qp_handle);
409 if (qp->rq_cpu_addr) {
410 ibdev_dbg(&dev->ibdev,
411 "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
412 qp->rq_cpu_addr, qp->rq_size,
414 dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
418 efa_qp_user_mmap_entries_remove(qp);
423 static struct rdma_user_mmap_entry*
424 efa_user_mmap_entry_insert(struct ib_ucontext *ucontext,
425 u64 address, size_t length,
426 u8 mmap_flag, u64 *offset)
428 struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
434 entry->address = address;
435 entry->mmap_flag = mmap_flag;
437 err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry,
443 *offset = rdma_user_mmap_get_offset(&entry->rdma_entry);
445 return &entry->rdma_entry;
448 static int qp_mmap_entries_setup(struct efa_qp *qp,
450 struct efa_ucontext *ucontext,
451 struct efa_com_create_qp_params *params,
452 struct efa_ibv_create_qp_resp *resp)
457 address = dev->db_bar_addr + resp->sq_db_offset;
458 qp->sq_db_mmap_entry =
459 efa_user_mmap_entry_insert(&ucontext->ibucontext,
461 PAGE_SIZE, EFA_MMAP_IO_NC,
462 &resp->sq_db_mmap_key);
463 if (!qp->sq_db_mmap_entry)
466 resp->sq_db_offset &= ~PAGE_MASK;
468 address = dev->mem_bar_addr + resp->llq_desc_offset;
469 length = PAGE_ALIGN(params->sq_ring_size_in_bytes +
470 (resp->llq_desc_offset & ~PAGE_MASK));
472 qp->llq_desc_mmap_entry =
473 efa_user_mmap_entry_insert(&ucontext->ibucontext,
476 &resp->llq_desc_mmap_key);
477 if (!qp->llq_desc_mmap_entry)
478 goto err_remove_mmap;
480 resp->llq_desc_offset &= ~PAGE_MASK;
483 address = dev->db_bar_addr + resp->rq_db_offset;
485 qp->rq_db_mmap_entry =
486 efa_user_mmap_entry_insert(&ucontext->ibucontext,
489 &resp->rq_db_mmap_key);
490 if (!qp->rq_db_mmap_entry)
491 goto err_remove_mmap;
493 resp->rq_db_offset &= ~PAGE_MASK;
495 address = virt_to_phys(qp->rq_cpu_addr);
497 efa_user_mmap_entry_insert(&ucontext->ibucontext,
498 address, qp->rq_size,
501 if (!qp->rq_mmap_entry)
502 goto err_remove_mmap;
504 resp->rq_mmap_size = qp->rq_size;
510 efa_qp_user_mmap_entries_remove(qp);
515 static int efa_qp_validate_cap(struct efa_dev *dev,
516 struct ib_qp_init_attr *init_attr)
518 if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {
519 ibdev_dbg(&dev->ibdev,
520 "qp: requested send wr[%u] exceeds the max[%u]\n",
521 init_attr->cap.max_send_wr,
522 dev->dev_attr.max_sq_depth);
525 if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {
526 ibdev_dbg(&dev->ibdev,
527 "qp: requested receive wr[%u] exceeds the max[%u]\n",
528 init_attr->cap.max_recv_wr,
529 dev->dev_attr.max_rq_depth);
532 if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {
533 ibdev_dbg(&dev->ibdev,
534 "qp: requested sge send[%u] exceeds the max[%u]\n",
535 init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);
538 if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {
539 ibdev_dbg(&dev->ibdev,
540 "qp: requested sge recv[%u] exceeds the max[%u]\n",
541 init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);
544 if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {
545 ibdev_dbg(&dev->ibdev,
546 "qp: requested inline data[%u] exceeds the max[%u]\n",
547 init_attr->cap.max_inline_data,
548 dev->dev_attr.inline_buf_size);
555 static int efa_qp_validate_attr(struct efa_dev *dev,
556 struct ib_qp_init_attr *init_attr)
558 if (init_attr->qp_type != IB_QPT_DRIVER &&
559 init_attr->qp_type != IB_QPT_UD) {
560 ibdev_dbg(&dev->ibdev,
561 "Unsupported qp type %d\n", init_attr->qp_type);
565 if (init_attr->srq) {
566 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");
570 if (init_attr->create_flags) {
571 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");
578 struct ib_qp *efa_create_qp(struct ib_pd *ibpd,
579 struct ib_qp_init_attr *init_attr,
580 struct ib_udata *udata)
582 struct efa_com_create_qp_params create_qp_params = {};
583 struct efa_com_create_qp_result create_qp_resp;
584 struct efa_dev *dev = to_edev(ibpd->device);
585 struct efa_ibv_create_qp_resp resp = {};
586 struct efa_ibv_create_qp cmd = {};
587 struct efa_ucontext *ucontext;
591 ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
594 err = efa_qp_validate_cap(dev, init_attr);
598 err = efa_qp_validate_attr(dev, init_attr);
602 if (!field_avail(cmd, driver_qp_type, udata->inlen)) {
603 ibdev_dbg(&dev->ibdev,
604 "Incompatible ABI params, no input udata\n");
609 if (udata->inlen > sizeof(cmd) &&
610 !ib_is_udata_cleared(udata, sizeof(cmd),
611 udata->inlen - sizeof(cmd))) {
612 ibdev_dbg(&dev->ibdev,
613 "Incompatible ABI params, unknown fields in udata\n");
618 err = ib_copy_from_udata(&cmd, udata,
619 min(sizeof(cmd), udata->inlen));
621 ibdev_dbg(&dev->ibdev,
622 "Cannot copy udata for create_qp\n");
627 ibdev_dbg(&dev->ibdev,
628 "Incompatible ABI params, unknown fields in udata\n");
633 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
639 create_qp_params.uarn = ucontext->uarn;
640 create_qp_params.pd = to_epd(ibpd)->pdn;
642 if (init_attr->qp_type == IB_QPT_UD) {
643 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
644 } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
645 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
647 ibdev_dbg(&dev->ibdev,
648 "Unsupported qp type %d driver qp type %d\n",
649 init_attr->qp_type, cmd.driver_qp_type);
654 ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
655 init_attr->qp_type, cmd.driver_qp_type);
656 create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
657 create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
658 create_qp_params.sq_depth = init_attr->cap.max_send_wr;
659 create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
661 create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
662 create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
663 qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
665 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
666 qp->rq_size, DMA_TO_DEVICE);
667 if (!qp->rq_cpu_addr) {
672 ibdev_dbg(&dev->ibdev,
673 "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
674 qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
675 create_qp_params.rq_base_addr = qp->rq_dma_addr;
678 err = efa_com_create_qp(&dev->edev, &create_qp_params,
681 goto err_free_mapped;
683 resp.sq_db_offset = create_qp_resp.sq_db_offset;
684 resp.rq_db_offset = create_qp_resp.rq_db_offset;
685 resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
686 resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
687 resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
689 err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
694 qp->qp_handle = create_qp_resp.qp_handle;
695 qp->ibqp.qp_num = create_qp_resp.qp_num;
696 qp->ibqp.qp_type = init_attr->qp_type;
697 qp->max_send_wr = init_attr->cap.max_send_wr;
698 qp->max_recv_wr = init_attr->cap.max_recv_wr;
699 qp->max_send_sge = init_attr->cap.max_send_sge;
700 qp->max_recv_sge = init_attr->cap.max_recv_sge;
701 qp->max_inline_data = init_attr->cap.max_inline_data;
704 err = ib_copy_to_udata(udata, &resp,
705 min(sizeof(resp), udata->outlen));
707 ibdev_dbg(&dev->ibdev,
708 "Failed to copy udata for qp[%u]\n",
709 create_qp_resp.qp_num);
710 goto err_remove_mmap_entries;
714 ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
718 err_remove_mmap_entries:
719 efa_qp_user_mmap_entries_remove(qp);
721 efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
724 dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
727 if (!qp->rq_mmap_entry)
728 free_pages_exact(qp->rq_cpu_addr, qp->rq_size);
733 atomic64_inc(&dev->stats.sw_stats.create_qp_err);
737 static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
738 struct ib_qp_attr *qp_attr, int qp_attr_mask,
739 enum ib_qp_state cur_state,
740 enum ib_qp_state new_state)
742 #define EFA_MODIFY_QP_SUPP_MASK \
743 (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
744 IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN)
746 if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
747 ibdev_dbg(&dev->ibdev,
748 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
749 qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
753 if (!ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
755 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
759 if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
760 ibdev_dbg(&dev->ibdev, "Can't change port num\n");
764 if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
765 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
772 int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
773 int qp_attr_mask, struct ib_udata *udata)
775 struct efa_dev *dev = to_edev(ibqp->device);
776 struct efa_com_modify_qp_params params = {};
777 struct efa_qp *qp = to_eqp(ibqp);
778 enum ib_qp_state cur_state;
779 enum ib_qp_state new_state;
783 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
784 ibdev_dbg(&dev->ibdev,
785 "Incompatible ABI params, udata not cleared\n");
789 cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
791 new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
793 err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
798 params.qp_handle = qp->qp_handle;
800 if (qp_attr_mask & IB_QP_STATE) {
801 params.modify_mask |= BIT(EFA_ADMIN_QP_STATE_BIT) |
802 BIT(EFA_ADMIN_CUR_QP_STATE_BIT);
803 params.cur_qp_state = qp_attr->cur_qp_state;
804 params.qp_state = qp_attr->qp_state;
807 if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
808 params.modify_mask |=
809 BIT(EFA_ADMIN_SQ_DRAINED_ASYNC_NOTIFY_BIT);
810 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
813 if (qp_attr_mask & IB_QP_QKEY) {
814 params.modify_mask |= BIT(EFA_ADMIN_QKEY_BIT);
815 params.qkey = qp_attr->qkey;
818 if (qp_attr_mask & IB_QP_SQ_PSN) {
819 params.modify_mask |= BIT(EFA_ADMIN_SQ_PSN_BIT);
820 params.sq_psn = qp_attr->sq_psn;
823 err = efa_com_modify_qp(&dev->edev, ¶ms);
827 qp->state = new_state;
832 static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
834 struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
836 return efa_com_destroy_cq(&dev->edev, ¶ms);
839 void efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
841 struct efa_dev *dev = to_edev(ibcq->device);
842 struct efa_cq *cq = to_ecq(ibcq);
844 ibdev_dbg(&dev->ibdev,
845 "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
846 cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
848 efa_destroy_cq_idx(dev, cq->cq_idx);
849 dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
851 rdma_user_mmap_entry_remove(cq->mmap_entry);
854 static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
855 struct efa_ibv_create_cq_resp *resp)
857 resp->q_mmap_size = cq->size;
858 cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
859 virt_to_phys(cq->cpu_addr),
860 cq->size, EFA_MMAP_DMA_PAGE,
868 int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
869 struct ib_udata *udata)
871 struct efa_ucontext *ucontext = rdma_udata_to_drv_context(
872 udata, struct efa_ucontext, ibucontext);
873 struct efa_ibv_create_cq_resp resp = {};
874 struct efa_com_create_cq_params params;
875 struct efa_com_create_cq_result result;
876 struct ib_device *ibdev = ibcq->device;
877 struct efa_dev *dev = to_edev(ibdev);
878 struct efa_ibv_create_cq cmd = {};
879 struct efa_cq *cq = to_ecq(ibcq);
880 int entries = attr->cqe;
883 ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
885 if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
887 "cq: requested entries[%u] non-positive or greater than max[%u]\n",
888 entries, dev->dev_attr.max_cq_depth);
893 if (!field_avail(cmd, num_sub_cqs, udata->inlen)) {
895 "Incompatible ABI params, no input udata\n");
900 if (udata->inlen > sizeof(cmd) &&
901 !ib_is_udata_cleared(udata, sizeof(cmd),
902 udata->inlen - sizeof(cmd))) {
904 "Incompatible ABI params, unknown fields in udata\n");
909 err = ib_copy_from_udata(&cmd, udata,
910 min(sizeof(cmd), udata->inlen));
912 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
916 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_50)) {
918 "Incompatible ABI params, unknown fields in udata\n");
923 if (!cmd.cq_entry_size) {
925 "Invalid entry size [%u]\n", cmd.cq_entry_size);
930 if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
932 "Invalid number of sub cqs[%u] expected[%u]\n",
933 cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
938 cq->ucontext = ucontext;
939 cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
940 cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
947 params.uarn = cq->ucontext->uarn;
948 params.cq_depth = entries;
949 params.dma_addr = cq->dma_addr;
950 params.entry_size_in_bytes = cmd.cq_entry_size;
951 params.num_sub_cqs = cmd.num_sub_cqs;
952 err = efa_com_create_cq(&dev->edev, ¶ms, &result);
954 goto err_free_mapped;
956 resp.cq_idx = result.cq_idx;
957 cq->cq_idx = result.cq_idx;
958 cq->ibcq.cqe = result.actual_depth;
959 WARN_ON_ONCE(entries != result.actual_depth);
961 err = cq_mmap_entries_setup(dev, cq, &resp);
963 ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n",
969 err = ib_copy_to_udata(udata, &resp,
970 min(sizeof(resp), udata->outlen));
973 "Failed to copy udata for create_cq\n");
974 goto err_remove_mmap;
978 ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
979 cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
984 rdma_user_mmap_entry_remove(cq->mmap_entry);
986 efa_destroy_cq_idx(dev, cq->cq_idx);
988 dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
991 free_pages_exact(cq->cpu_addr, cq->size);
994 atomic64_inc(&dev->stats.sw_stats.create_cq_err);
998 static int umem_to_page_list(struct efa_dev *dev,
999 struct ib_umem *umem,
1004 u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
1005 struct ib_block_iter biter;
1006 unsigned int hp_idx = 0;
1008 ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
1009 hp_cnt, pages_in_hp);
1011 rdma_for_each_block(umem->sg_head.sgl, &biter, umem->nmap,
1013 page_list[hp_idx++] = rdma_block_iter_dma_address(&biter);
1018 static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
1020 struct scatterlist *sglist;
1024 sglist = kcalloc(page_cnt, sizeof(*sglist), GFP_KERNEL);
1027 sg_init_table(sglist, page_cnt);
1028 for (i = 0; i < page_cnt; i++) {
1029 pg = vmalloc_to_page(buf);
1032 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
1033 buf += PAGE_SIZE / sizeof(*buf);
1043 * create a chunk list of physical pages dma addresses from the supplied
1044 * scatter gather list
1046 static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
1048 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1049 int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
1050 struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
1051 unsigned int chunk_list_size, chunk_idx, payload_idx;
1052 int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
1053 struct efa_com_ctrl_buff_info *ctrl_buf;
1054 u64 *cur_chunk_buf, *prev_chunk_buf;
1055 struct ib_block_iter biter;
1056 dma_addr_t dma_addr;
1059 /* allocate a chunk list that consists of 4KB chunks */
1060 chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
1062 chunk_list->size = chunk_list_size;
1063 chunk_list->chunks = kcalloc(chunk_list_size,
1064 sizeof(*chunk_list->chunks),
1066 if (!chunk_list->chunks)
1069 ibdev_dbg(&dev->ibdev,
1070 "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
1073 /* allocate chunk buffers: */
1074 for (i = 0; i < chunk_list_size; i++) {
1075 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
1076 if (!chunk_list->chunks[i].buf)
1077 goto chunk_list_dealloc;
1079 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
1081 chunk_list->chunks[chunk_list_size - 1].length =
1082 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
1085 /* fill the dma addresses of sg list pages to chunks: */
1088 cur_chunk_buf = chunk_list->chunks[0].buf;
1089 rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt,
1090 EFA_CHUNK_PAYLOAD_SIZE) {
1091 cur_chunk_buf[payload_idx++] =
1092 rdma_block_iter_dma_address(&biter);
1094 if (payload_idx == EFA_PTRS_PER_CHUNK) {
1096 cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
1101 /* map chunks to dma and fill chunks next ptrs */
1102 for (i = chunk_list_size - 1; i >= 0; i--) {
1103 dma_addr = dma_map_single(&dev->pdev->dev,
1104 chunk_list->chunks[i].buf,
1105 chunk_list->chunks[i].length,
1107 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1108 ibdev_err(&dev->ibdev,
1109 "chunk[%u] dma_map_failed\n", i);
1110 goto chunk_list_unmap;
1113 chunk_list->chunks[i].dma_addr = dma_addr;
1114 ibdev_dbg(&dev->ibdev,
1115 "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
1120 prev_chunk_buf = chunk_list->chunks[i - 1].buf;
1122 ctrl_buf = (struct efa_com_ctrl_buff_info *)
1123 &prev_chunk_buf[EFA_PTRS_PER_CHUNK];
1124 ctrl_buf->length = chunk_list->chunks[i].length;
1126 efa_com_set_dma_addr(dma_addr,
1127 &ctrl_buf->address.mem_addr_high,
1128 &ctrl_buf->address.mem_addr_low);
1134 for (; i < chunk_list_size; i++) {
1135 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1136 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1139 for (i = 0; i < chunk_list_size; i++)
1140 kfree(chunk_list->chunks[i].buf);
1142 kfree(chunk_list->chunks);
1146 static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1148 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1151 for (i = 0; i < chunk_list->size; i++) {
1152 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1153 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1154 kfree(chunk_list->chunks[i].buf);
1157 kfree(chunk_list->chunks);
1160 /* initialize pbl continuous mode: map pbl buffer to a dma address. */
1161 static int pbl_continuous_initialize(struct efa_dev *dev,
1162 struct pbl_context *pbl)
1164 dma_addr_t dma_addr;
1166 dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
1167 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1168 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1169 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
1173 pbl->phys.continuous.dma_addr = dma_addr;
1174 ibdev_dbg(&dev->ibdev,
1175 "pbl continuous - dma_addr = %pad, size[%u]\n",
1176 &dma_addr, pbl->pbl_buf_size_in_bytes);
1182 * initialize pbl indirect mode:
1183 * create a chunk list out of the dma addresses of the physical pages of
1186 static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
1188 u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, PAGE_SIZE);
1189 struct scatterlist *sgl;
1190 int sg_dma_cnt, err;
1192 BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
1193 sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
1197 sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1203 pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
1204 pbl->phys.indirect.sgl = sgl;
1205 pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
1206 err = pbl_chunk_list_create(dev, pbl);
1208 ibdev_dbg(&dev->ibdev,
1209 "chunk_list creation failed[%d]\n", err);
1213 ibdev_dbg(&dev->ibdev,
1214 "pbl indirect - size[%u], chunks[%u]\n",
1215 pbl->pbl_buf_size_in_bytes,
1216 pbl->phys.indirect.chunk_list.size);
1221 dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1227 static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
1229 pbl_chunk_list_destroy(dev, pbl);
1230 dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
1231 pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
1232 kfree(pbl->phys.indirect.sgl);
1235 /* create a page buffer list from a mapped user memory region */
1236 static int pbl_create(struct efa_dev *dev,
1237 struct pbl_context *pbl,
1238 struct ib_umem *umem,
1244 pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
1245 pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL);
1249 if (is_vmalloc_addr(pbl->pbl_buf)) {
1250 pbl->physically_continuous = 0;
1251 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1256 err = pbl_indirect_initialize(dev, pbl);
1260 pbl->physically_continuous = 1;
1261 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1266 err = pbl_continuous_initialize(dev, pbl);
1271 ibdev_dbg(&dev->ibdev,
1272 "user_pbl_created: user_pages[%u], continuous[%u]\n",
1273 hp_cnt, pbl->physically_continuous);
1278 kvfree(pbl->pbl_buf);
1282 static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1284 if (pbl->physically_continuous)
1285 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
1286 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1288 pbl_indirect_terminate(dev, pbl);
1290 kvfree(pbl->pbl_buf);
1293 static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
1294 struct efa_com_reg_mr_params *params)
1298 params->inline_pbl = 1;
1299 err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
1300 params->page_num, params->page_shift);
1304 ibdev_dbg(&dev->ibdev,
1305 "inline_pbl_array - pages[%u]\n", params->page_num);
1310 static int efa_create_pbl(struct efa_dev *dev,
1311 struct pbl_context *pbl,
1313 struct efa_com_reg_mr_params *params)
1317 err = pbl_create(dev, pbl, mr->umem, params->page_num,
1318 params->page_shift);
1320 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
1324 params->inline_pbl = 0;
1325 params->indirect = !pbl->physically_continuous;
1326 if (pbl->physically_continuous) {
1327 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
1329 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
1330 ¶ms->pbl.pbl.address.mem_addr_high,
1331 ¶ms->pbl.pbl.address.mem_addr_low);
1333 params->pbl.pbl.length =
1334 pbl->phys.indirect.chunk_list.chunks[0].length;
1336 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
1337 ¶ms->pbl.pbl.address.mem_addr_high,
1338 ¶ms->pbl.pbl.address.mem_addr_low);
1344 struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
1345 u64 virt_addr, int access_flags,
1346 struct ib_udata *udata)
1348 struct efa_dev *dev = to_edev(ibpd->device);
1349 struct efa_com_reg_mr_params params = {};
1350 struct efa_com_reg_mr_result result = {};
1351 struct pbl_context pbl;
1352 int supp_access_flags;
1358 if (udata && udata->inlen &&
1359 !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
1360 ibdev_dbg(&dev->ibdev,
1361 "Incompatible ABI params, udata not cleared\n");
1367 IB_ACCESS_LOCAL_WRITE |
1368 (is_rdma_read_cap(dev) ? IB_ACCESS_REMOTE_READ : 0);
1370 access_flags &= ~IB_ACCESS_OPTIONAL;
1371 if (access_flags & ~supp_access_flags) {
1372 ibdev_dbg(&dev->ibdev,
1373 "Unsupported access flags[%#x], supported[%#x]\n",
1374 access_flags, supp_access_flags);
1379 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1385 mr->umem = ib_umem_get(ibpd->device, start, length, access_flags);
1386 if (IS_ERR(mr->umem)) {
1387 err = PTR_ERR(mr->umem);
1388 ibdev_dbg(&dev->ibdev,
1389 "Failed to pin and map user space memory[%d]\n", err);
1393 params.pd = to_epd(ibpd)->pdn;
1394 params.iova = virt_addr;
1395 params.mr_length_in_bytes = length;
1396 params.permissions = access_flags;
1398 pg_sz = ib_umem_find_best_pgsz(mr->umem,
1399 dev->dev_attr.page_size_cap,
1403 ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n",
1404 dev->dev_attr.page_size_cap);
1408 params.page_shift = __ffs(pg_sz);
1409 params.page_num = DIV_ROUND_UP(length + (start & (pg_sz - 1)),
1412 ibdev_dbg(&dev->ibdev,
1413 "start %#llx length %#llx params.page_shift %u params.page_num %u\n",
1414 start, length, params.page_shift, params.page_num);
1416 inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
1417 if (params.page_num <= inline_size) {
1418 err = efa_create_inline_pbl(dev, mr, ¶ms);
1422 err = efa_com_register_mr(&dev->edev, ¶ms, &result);
1426 err = efa_create_pbl(dev, &pbl, mr, ¶ms);
1430 err = efa_com_register_mr(&dev->edev, ¶ms, &result);
1431 pbl_destroy(dev, &pbl);
1437 mr->ibmr.lkey = result.l_key;
1438 mr->ibmr.rkey = result.r_key;
1439 mr->ibmr.length = length;
1440 ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
1445 ib_umem_release(mr->umem);
1449 atomic64_inc(&dev->stats.sw_stats.reg_mr_err);
1450 return ERR_PTR(err);
1453 int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
1455 struct efa_dev *dev = to_edev(ibmr->device);
1456 struct efa_com_dereg_mr_params params;
1457 struct efa_mr *mr = to_emr(ibmr);
1460 ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
1462 params.l_key = mr->ibmr.lkey;
1463 err = efa_com_dereg_mr(&dev->edev, ¶ms);
1467 ib_umem_release(mr->umem);
1473 int efa_get_port_immutable(struct ib_device *ibdev, u8 port_num,
1474 struct ib_port_immutable *immutable)
1476 struct ib_port_attr attr;
1479 err = ib_query_port(ibdev, port_num, &attr);
1481 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
1485 immutable->pkey_tbl_len = attr.pkey_tbl_len;
1486 immutable->gid_tbl_len = attr.gid_tbl_len;
1491 static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
1493 struct efa_com_dealloc_uar_params params = {
1497 return efa_com_dealloc_uar(&dev->edev, ¶ms);
1500 int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
1502 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1503 struct efa_dev *dev = to_edev(ibucontext->device);
1504 struct efa_ibv_alloc_ucontext_resp resp = {};
1505 struct efa_com_alloc_uar_result result;
1509 * it's fine if the driver does not know all request fields,
1510 * we will ack input fields in our response.
1513 err = efa_com_alloc_uar(&dev->edev, &result);
1517 ucontext->uarn = result.uarn;
1519 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
1520 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
1521 resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
1522 resp.inline_buf_size = dev->dev_attr.inline_buf_size;
1523 resp.max_llq_size = dev->dev_attr.max_llq_size;
1525 if (udata && udata->outlen) {
1526 err = ib_copy_to_udata(udata, &resp,
1527 min(sizeof(resp), udata->outlen));
1529 goto err_dealloc_uar;
1535 efa_dealloc_uar(dev, result.uarn);
1537 atomic64_inc(&dev->stats.sw_stats.alloc_ucontext_err);
1541 void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
1543 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1544 struct efa_dev *dev = to_edev(ibucontext->device);
1546 efa_dealloc_uar(dev, ucontext->uarn);
1549 void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
1551 struct efa_user_mmap_entry *entry = to_emmap(rdma_entry);
1553 /* DMA mapping is already gone, now free the pages */
1554 if (entry->mmap_flag == EFA_MMAP_DMA_PAGE)
1555 free_pages_exact(phys_to_virt(entry->address),
1556 entry->rdma_entry.npages * PAGE_SIZE);
1560 static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
1561 struct vm_area_struct *vma)
1563 struct rdma_user_mmap_entry *rdma_entry;
1564 struct efa_user_mmap_entry *entry;
1569 rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma);
1571 ibdev_dbg(&dev->ibdev,
1572 "pgoff[%#lx] does not have valid entry\n",
1576 entry = to_emmap(rdma_entry);
1578 ibdev_dbg(&dev->ibdev,
1579 "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n",
1580 entry->address, rdma_entry->npages * PAGE_SIZE,
1583 pfn = entry->address >> PAGE_SHIFT;
1584 switch (entry->mmap_flag) {
1585 case EFA_MMAP_IO_NC:
1586 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
1587 entry->rdma_entry.npages * PAGE_SIZE,
1588 pgprot_noncached(vma->vm_page_prot),
1591 case EFA_MMAP_IO_WC:
1592 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
1593 entry->rdma_entry.npages * PAGE_SIZE,
1594 pgprot_writecombine(vma->vm_page_prot),
1597 case EFA_MMAP_DMA_PAGE:
1598 for (va = vma->vm_start; va < vma->vm_end;
1599 va += PAGE_SIZE, pfn++) {
1600 err = vm_insert_page(vma, va, pfn_to_page(pfn));
1612 "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n",
1613 entry->address, rdma_entry->npages * PAGE_SIZE,
1614 entry->mmap_flag, err);
1616 rdma_user_mmap_entry_put(rdma_entry);
1620 int efa_mmap(struct ib_ucontext *ibucontext,
1621 struct vm_area_struct *vma)
1623 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1624 struct efa_dev *dev = to_edev(ibucontext->device);
1625 size_t length = vma->vm_end - vma->vm_start;
1627 ibdev_dbg(&dev->ibdev,
1628 "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n",
1629 vma->vm_start, vma->vm_end, length, vma->vm_pgoff);
1631 return __efa_mmap(dev, ucontext, vma);
1634 static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
1636 struct efa_com_destroy_ah_params params = {
1638 .pdn = to_epd(ah->ibah.pd)->pdn,
1641 return efa_com_destroy_ah(&dev->edev, ¶ms);
1644 int efa_create_ah(struct ib_ah *ibah,
1645 struct rdma_ah_attr *ah_attr,
1647 struct ib_udata *udata)
1649 struct efa_dev *dev = to_edev(ibah->device);
1650 struct efa_com_create_ah_params params = {};
1651 struct efa_ibv_create_ah_resp resp = {};
1652 struct efa_com_create_ah_result result;
1653 struct efa_ah *ah = to_eah(ibah);
1656 if (!(flags & RDMA_CREATE_AH_SLEEPABLE)) {
1657 ibdev_dbg(&dev->ibdev,
1658 "Create address handle is not supported in atomic context\n");
1664 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1665 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
1670 memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
1671 sizeof(params.dest_addr));
1672 params.pdn = to_epd(ibah->pd)->pdn;
1673 err = efa_com_create_ah(&dev->edev, ¶ms, &result);
1677 memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
1680 resp.efa_address_handle = result.ah;
1682 if (udata->outlen) {
1683 err = ib_copy_to_udata(udata, &resp,
1684 min(sizeof(resp), udata->outlen));
1686 ibdev_dbg(&dev->ibdev,
1687 "Failed to copy udata for create_ah response\n");
1688 goto err_destroy_ah;
1691 ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
1696 efa_ah_destroy(dev, ah);
1698 atomic64_inc(&dev->stats.sw_stats.create_ah_err);
1702 void efa_destroy_ah(struct ib_ah *ibah, u32 flags)
1704 struct efa_dev *dev = to_edev(ibah->pd->device);
1705 struct efa_ah *ah = to_eah(ibah);
1707 ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
1709 if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
1710 ibdev_dbg(&dev->ibdev,
1711 "Destroy address handle is not supported in atomic context\n");
1715 efa_ah_destroy(dev, ah);
1718 struct rdma_hw_stats *efa_alloc_hw_stats(struct ib_device *ibdev, u8 port_num)
1720 return rdma_alloc_hw_stats_struct(efa_stats_names,
1721 ARRAY_SIZE(efa_stats_names),
1722 RDMA_HW_STATS_DEFAULT_LIFESPAN);
1725 int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
1726 u8 port_num, int index)
1728 struct efa_com_get_stats_params params = {};
1729 union efa_com_get_stats_result result;
1730 struct efa_dev *dev = to_edev(ibdev);
1731 struct efa_com_basic_stats *bs;
1732 struct efa_com_stats_admin *as;
1733 struct efa_stats *s;
1736 params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC;
1737 params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL;
1739 err = efa_com_get_stats(&dev->edev, ¶ms, &result);
1743 bs = &result.basic_stats;
1744 stats->value[EFA_TX_BYTES] = bs->tx_bytes;
1745 stats->value[EFA_TX_PKTS] = bs->tx_pkts;
1746 stats->value[EFA_RX_BYTES] = bs->rx_bytes;
1747 stats->value[EFA_RX_PKTS] = bs->rx_pkts;
1748 stats->value[EFA_RX_DROPS] = bs->rx_drops;
1750 as = &dev->edev.aq.stats;
1751 stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd);
1752 stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd);
1753 stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion);
1756 stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd);
1757 stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->sw_stats.alloc_pd_err);
1758 stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->sw_stats.create_qp_err);
1759 stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->sw_stats.reg_mr_err);
1760 stats->value[EFA_ALLOC_UCONTEXT_ERR] = atomic64_read(&s->sw_stats.alloc_ucontext_err);
1761 stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->sw_stats.create_ah_err);
1763 return ARRAY_SIZE(efa_stats_names);
1766 enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
1769 return IB_LINK_LAYER_UNSPECIFIED;