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1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2/*
3 * Copyright 2018-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
4 */
5
6#include <linux/vmalloc.h>
7
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>
13
14#include "efa.h"
15
16enum {
17 EFA_MMAP_DMA_PAGE = 0,
18 EFA_MMAP_IO_WC,
19 EFA_MMAP_IO_NC,
20};
21
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))
25
26struct efa_user_mmap_entry {
27 struct rdma_user_mmap_entry rdma_entry;
28 u64 address;
29 u8 mmap_flag;
30};
31
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_CMDS_ERR, "cmds_err") \
41 op(EFA_NO_COMPLETION_CMDS, "no_completion_cmds") \
42 op(EFA_KEEP_ALIVE_RCVD, "keep_alive_rcvd") \
43 op(EFA_ALLOC_PD_ERR, "alloc_pd_err") \
44 op(EFA_CREATE_QP_ERR, "create_qp_err") \
45 op(EFA_CREATE_CQ_ERR, "create_cq_err") \
46 op(EFA_REG_MR_ERR, "reg_mr_err") \
47 op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \
48 op(EFA_CREATE_AH_ERR, "create_ah_err") \
49 op(EFA_MMAP_ERR, "mmap_err")
50
51#define EFA_STATS_ENUM(ename, name) ename,
52#define EFA_STATS_STR(ename, name) [ename] = name,
53
54enum efa_hw_stats {
55 EFA_DEFINE_STATS(EFA_STATS_ENUM)
56};
57
58static const char *const efa_stats_names[] = {
59 EFA_DEFINE_STATS(EFA_STATS_STR)
60};
61
62#define EFA_CHUNK_PAYLOAD_SHIFT 12
63#define EFA_CHUNK_PAYLOAD_SIZE BIT(EFA_CHUNK_PAYLOAD_SHIFT)
64#define EFA_CHUNK_PAYLOAD_PTR_SIZE 8
65
66#define EFA_CHUNK_SHIFT 12
67#define EFA_CHUNK_SIZE BIT(EFA_CHUNK_SHIFT)
68#define EFA_CHUNK_PTR_SIZE sizeof(struct efa_com_ctrl_buff_info)
69
70#define EFA_PTRS_PER_CHUNK \
71 ((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
72
73#define EFA_CHUNK_USED_SIZE \
74 ((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
75
76struct pbl_chunk {
77 dma_addr_t dma_addr;
78 u64 *buf;
79 u32 length;
80};
81
82struct pbl_chunk_list {
83 struct pbl_chunk *chunks;
84 unsigned int size;
85};
86
87struct pbl_context {
88 union {
89 struct {
90 dma_addr_t dma_addr;
91 } continuous;
92 struct {
93 u32 pbl_buf_size_in_pages;
94 struct scatterlist *sgl;
95 int sg_dma_cnt;
96 struct pbl_chunk_list chunk_list;
97 } indirect;
98 } phys;
99 u64 *pbl_buf;
100 u32 pbl_buf_size_in_bytes;
101 u8 physically_continuous;
102};
103
104static inline struct efa_dev *to_edev(struct ib_device *ibdev)
105{
106 return container_of(ibdev, struct efa_dev, ibdev);
107}
108
109static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
110{
111 return container_of(ibucontext, struct efa_ucontext, ibucontext);
112}
113
114static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
115{
116 return container_of(ibpd, struct efa_pd, ibpd);
117}
118
119static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
120{
121 return container_of(ibmr, struct efa_mr, ibmr);
122}
123
124static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
125{
126 return container_of(ibqp, struct efa_qp, ibqp);
127}
128
129static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
130{
131 return container_of(ibcq, struct efa_cq, ibcq);
132}
133
134static inline struct efa_ah *to_eah(struct ib_ah *ibah)
135{
136 return container_of(ibah, struct efa_ah, ibah);
137}
138
139static inline struct efa_user_mmap_entry *
140to_emmap(struct rdma_user_mmap_entry *rdma_entry)
141{
142 return container_of(rdma_entry, struct efa_user_mmap_entry, rdma_entry);
143}
144
145static inline bool is_rdma_read_cap(struct efa_dev *dev)
146{
147 return dev->dev_attr.device_caps & EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_RDMA_READ_MASK;
148}
149
150#define is_reserved_cleared(reserved) \
151 !memchr_inv(reserved, 0, sizeof(reserved))
152
153static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
154 size_t size, enum dma_data_direction dir)
155{
156 void *addr;
157
158 addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
159 if (!addr)
160 return NULL;
161
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);
166 return NULL;
167 }
168
169 return addr;
170}
171
172static void efa_free_mapped(struct efa_dev *dev, void *cpu_addr,
173 dma_addr_t dma_addr,
174 size_t size, enum dma_data_direction dir)
175{
176 dma_unmap_single(&dev->pdev->dev, dma_addr, size, dir);
177 free_pages_exact(cpu_addr, size);
178}
179
180int efa_query_device(struct ib_device *ibdev,
181 struct ib_device_attr *props,
182 struct ib_udata *udata)
183{
184 struct efa_com_get_device_attr_result *dev_attr;
185 struct efa_ibv_ex_query_device_resp resp = {};
186 struct efa_dev *dev = to_edev(ibdev);
187 int err;
188
189 if (udata && udata->inlen &&
190 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
191 ibdev_dbg(ibdev,
192 "Incompatible ABI params, udata not cleared\n");
193 return -EINVAL;
194 }
195
196 dev_attr = &dev->dev_attr;
197
198 memset(props, 0, sizeof(*props));
199 props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
200 props->page_size_cap = dev_attr->page_size_cap;
201 props->vendor_id = dev->pdev->vendor;
202 props->vendor_part_id = dev->pdev->device;
203 props->hw_ver = dev->pdev->subsystem_device;
204 props->max_qp = dev_attr->max_qp;
205 props->max_cq = dev_attr->max_cq;
206 props->max_pd = dev_attr->max_pd;
207 props->max_mr = dev_attr->max_mr;
208 props->max_ah = dev_attr->max_ah;
209 props->max_cqe = dev_attr->max_cq_depth;
210 props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
211 dev_attr->max_rq_depth);
212 props->max_send_sge = dev_attr->max_sq_sge;
213 props->max_recv_sge = dev_attr->max_rq_sge;
214 props->max_sge_rd = dev_attr->max_wr_rdma_sge;
215 props->max_pkeys = 1;
216
217 if (udata && udata->outlen) {
218 resp.max_sq_sge = dev_attr->max_sq_sge;
219 resp.max_rq_sge = dev_attr->max_rq_sge;
220 resp.max_sq_wr = dev_attr->max_sq_depth;
221 resp.max_rq_wr = dev_attr->max_rq_depth;
222 resp.max_rdma_size = dev_attr->max_rdma_size;
223
224 if (is_rdma_read_cap(dev))
225 resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ;
226
227 err = ib_copy_to_udata(udata, &resp,
228 min(sizeof(resp), udata->outlen));
229 if (err) {
230 ibdev_dbg(ibdev,
231 "Failed to copy udata for query_device\n");
232 return err;
233 }
234 }
235
236 return 0;
237}
238
239int efa_query_port(struct ib_device *ibdev, u8 port,
240 struct ib_port_attr *props)
241{
242 struct efa_dev *dev = to_edev(ibdev);
243
244 props->lmc = 1;
245
246 props->state = IB_PORT_ACTIVE;
247 props->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
248 props->gid_tbl_len = 1;
249 props->pkey_tbl_len = 1;
250 props->active_speed = IB_SPEED_EDR;
251 props->active_width = IB_WIDTH_4X;
252 props->max_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
253 props->active_mtu = ib_mtu_int_to_enum(dev->dev_attr.mtu);
254 props->max_msg_sz = dev->dev_attr.mtu;
255 props->max_vl_num = 1;
256
257 return 0;
258}
259
260int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
261 int qp_attr_mask,
262 struct ib_qp_init_attr *qp_init_attr)
263{
264 struct efa_dev *dev = to_edev(ibqp->device);
265 struct efa_com_query_qp_params params = {};
266 struct efa_com_query_qp_result result;
267 struct efa_qp *qp = to_eqp(ibqp);
268 int err;
269
270#define EFA_QUERY_QP_SUPP_MASK \
271 (IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
272 IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP)
273
274 if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
275 ibdev_dbg(&dev->ibdev,
276 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
277 qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
278 return -EOPNOTSUPP;
279 }
280
281 memset(qp_attr, 0, sizeof(*qp_attr));
282 memset(qp_init_attr, 0, sizeof(*qp_init_attr));
283
284 params.qp_handle = qp->qp_handle;
285 err = efa_com_query_qp(&dev->edev, ¶ms, &result);
286 if (err)
287 return err;
288
289 qp_attr->qp_state = result.qp_state;
290 qp_attr->qkey = result.qkey;
291 qp_attr->sq_psn = result.sq_psn;
292 qp_attr->sq_draining = result.sq_draining;
293 qp_attr->port_num = 1;
294
295 qp_attr->cap.max_send_wr = qp->max_send_wr;
296 qp_attr->cap.max_recv_wr = qp->max_recv_wr;
297 qp_attr->cap.max_send_sge = qp->max_send_sge;
298 qp_attr->cap.max_recv_sge = qp->max_recv_sge;
299 qp_attr->cap.max_inline_data = qp->max_inline_data;
300
301 qp_init_attr->qp_type = ibqp->qp_type;
302 qp_init_attr->recv_cq = ibqp->recv_cq;
303 qp_init_attr->send_cq = ibqp->send_cq;
304 qp_init_attr->qp_context = ibqp->qp_context;
305 qp_init_attr->cap = qp_attr->cap;
306
307 return 0;
308}
309
310int efa_query_gid(struct ib_device *ibdev, u8 port, int index,
311 union ib_gid *gid)
312{
313 struct efa_dev *dev = to_edev(ibdev);
314
315 memcpy(gid->raw, dev->dev_attr.addr, sizeof(dev->dev_attr.addr));
316
317 return 0;
318}
319
320int efa_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
321 u16 *pkey)
322{
323 if (index > 0)
324 return -EINVAL;
325
326 *pkey = 0xffff;
327 return 0;
328}
329
330static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
331{
332 struct efa_com_dealloc_pd_params params = {
333 .pdn = pdn,
334 };
335
336 return efa_com_dealloc_pd(&dev->edev, ¶ms);
337}
338
339int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
340{
341 struct efa_dev *dev = to_edev(ibpd->device);
342 struct efa_ibv_alloc_pd_resp resp = {};
343 struct efa_com_alloc_pd_result result;
344 struct efa_pd *pd = to_epd(ibpd);
345 int err;
346
347 if (udata->inlen &&
348 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
349 ibdev_dbg(&dev->ibdev,
350 "Incompatible ABI params, udata not cleared\n");
351 err = -EINVAL;
352 goto err_out;
353 }
354
355 err = efa_com_alloc_pd(&dev->edev, &result);
356 if (err)
357 goto err_out;
358
359 pd->pdn = result.pdn;
360 resp.pdn = result.pdn;
361
362 if (udata->outlen) {
363 err = ib_copy_to_udata(udata, &resp,
364 min(sizeof(resp), udata->outlen));
365 if (err) {
366 ibdev_dbg(&dev->ibdev,
367 "Failed to copy udata for alloc_pd\n");
368 goto err_dealloc_pd;
369 }
370 }
371
372 ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
373
374 return 0;
375
376err_dealloc_pd:
377 efa_pd_dealloc(dev, result.pdn);
378err_out:
379 atomic64_inc(&dev->stats.sw_stats.alloc_pd_err);
380 return err;
381}
382
383void efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
384{
385 struct efa_dev *dev = to_edev(ibpd->device);
386 struct efa_pd *pd = to_epd(ibpd);
387
388 ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
389 efa_pd_dealloc(dev, pd->pdn);
390}
391
392static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
393{
394 struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
395
396 return efa_com_destroy_qp(&dev->edev, ¶ms);
397}
398
399static void efa_qp_user_mmap_entries_remove(struct efa_qp *qp)
400{
401 rdma_user_mmap_entry_remove(qp->rq_mmap_entry);
402 rdma_user_mmap_entry_remove(qp->rq_db_mmap_entry);
403 rdma_user_mmap_entry_remove(qp->llq_desc_mmap_entry);
404 rdma_user_mmap_entry_remove(qp->sq_db_mmap_entry);
405}
406
407int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
408{
409 struct efa_dev *dev = to_edev(ibqp->pd->device);
410 struct efa_qp *qp = to_eqp(ibqp);
411 int err;
412
413 ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
414
415 efa_qp_user_mmap_entries_remove(qp);
416
417 err = efa_destroy_qp_handle(dev, qp->qp_handle);
418 if (err)
419 return err;
420
421 if (qp->rq_cpu_addr) {
422 ibdev_dbg(&dev->ibdev,
423 "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
424 qp->rq_cpu_addr, qp->rq_size,
425 &qp->rq_dma_addr);
426 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
427 qp->rq_size, DMA_TO_DEVICE);
428 }
429
430 kfree(qp);
431 return 0;
432}
433
434static struct rdma_user_mmap_entry*
435efa_user_mmap_entry_insert(struct ib_ucontext *ucontext,
436 u64 address, size_t length,
437 u8 mmap_flag, u64 *offset)
438{
439 struct efa_user_mmap_entry *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
440 int err;
441
442 if (!entry)
443 return NULL;
444
445 entry->address = address;
446 entry->mmap_flag = mmap_flag;
447
448 err = rdma_user_mmap_entry_insert(ucontext, &entry->rdma_entry,
449 length);
450 if (err) {
451 kfree(entry);
452 return NULL;
453 }
454 *offset = rdma_user_mmap_get_offset(&entry->rdma_entry);
455
456 return &entry->rdma_entry;
457}
458
459static int qp_mmap_entries_setup(struct efa_qp *qp,
460 struct efa_dev *dev,
461 struct efa_ucontext *ucontext,
462 struct efa_com_create_qp_params *params,
463 struct efa_ibv_create_qp_resp *resp)
464{
465 size_t length;
466 u64 address;
467
468 address = dev->db_bar_addr + resp->sq_db_offset;
469 qp->sq_db_mmap_entry =
470 efa_user_mmap_entry_insert(&ucontext->ibucontext,
471 address,
472 PAGE_SIZE, EFA_MMAP_IO_NC,
473 &resp->sq_db_mmap_key);
474 if (!qp->sq_db_mmap_entry)
475 return -ENOMEM;
476
477 resp->sq_db_offset &= ~PAGE_MASK;
478
479 address = dev->mem_bar_addr + resp->llq_desc_offset;
480 length = PAGE_ALIGN(params->sq_ring_size_in_bytes +
481 (resp->llq_desc_offset & ~PAGE_MASK));
482
483 qp->llq_desc_mmap_entry =
484 efa_user_mmap_entry_insert(&ucontext->ibucontext,
485 address, length,
486 EFA_MMAP_IO_WC,
487 &resp->llq_desc_mmap_key);
488 if (!qp->llq_desc_mmap_entry)
489 goto err_remove_mmap;
490
491 resp->llq_desc_offset &= ~PAGE_MASK;
492
493 if (qp->rq_size) {
494 address = dev->db_bar_addr + resp->rq_db_offset;
495
496 qp->rq_db_mmap_entry =
497 efa_user_mmap_entry_insert(&ucontext->ibucontext,
498 address, PAGE_SIZE,
499 EFA_MMAP_IO_NC,
500 &resp->rq_db_mmap_key);
501 if (!qp->rq_db_mmap_entry)
502 goto err_remove_mmap;
503
504 resp->rq_db_offset &= ~PAGE_MASK;
505
506 address = virt_to_phys(qp->rq_cpu_addr);
507 qp->rq_mmap_entry =
508 efa_user_mmap_entry_insert(&ucontext->ibucontext,
509 address, qp->rq_size,
510 EFA_MMAP_DMA_PAGE,
511 &resp->rq_mmap_key);
512 if (!qp->rq_mmap_entry)
513 goto err_remove_mmap;
514
515 resp->rq_mmap_size = qp->rq_size;
516 }
517
518 return 0;
519
520err_remove_mmap:
521 efa_qp_user_mmap_entries_remove(qp);
522
523 return -ENOMEM;
524}
525
526static int efa_qp_validate_cap(struct efa_dev *dev,
527 struct ib_qp_init_attr *init_attr)
528{
529 if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {
530 ibdev_dbg(&dev->ibdev,
531 "qp: requested send wr[%u] exceeds the max[%u]\n",
532 init_attr->cap.max_send_wr,
533 dev->dev_attr.max_sq_depth);
534 return -EINVAL;
535 }
536 if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {
537 ibdev_dbg(&dev->ibdev,
538 "qp: requested receive wr[%u] exceeds the max[%u]\n",
539 init_attr->cap.max_recv_wr,
540 dev->dev_attr.max_rq_depth);
541 return -EINVAL;
542 }
543 if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {
544 ibdev_dbg(&dev->ibdev,
545 "qp: requested sge send[%u] exceeds the max[%u]\n",
546 init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);
547 return -EINVAL;
548 }
549 if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {
550 ibdev_dbg(&dev->ibdev,
551 "qp: requested sge recv[%u] exceeds the max[%u]\n",
552 init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);
553 return -EINVAL;
554 }
555 if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {
556 ibdev_dbg(&dev->ibdev,
557 "qp: requested inline data[%u] exceeds the max[%u]\n",
558 init_attr->cap.max_inline_data,
559 dev->dev_attr.inline_buf_size);
560 return -EINVAL;
561 }
562
563 return 0;
564}
565
566static int efa_qp_validate_attr(struct efa_dev *dev,
567 struct ib_qp_init_attr *init_attr)
568{
569 if (init_attr->qp_type != IB_QPT_DRIVER &&
570 init_attr->qp_type != IB_QPT_UD) {
571 ibdev_dbg(&dev->ibdev,
572 "Unsupported qp type %d\n", init_attr->qp_type);
573 return -EOPNOTSUPP;
574 }
575
576 if (init_attr->srq) {
577 ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");
578 return -EOPNOTSUPP;
579 }
580
581 if (init_attr->create_flags) {
582 ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");
583 return -EOPNOTSUPP;
584 }
585
586 return 0;
587}
588
589struct ib_qp *efa_create_qp(struct ib_pd *ibpd,
590 struct ib_qp_init_attr *init_attr,
591 struct ib_udata *udata)
592{
593 struct efa_com_create_qp_params create_qp_params = {};
594 struct efa_com_create_qp_result create_qp_resp;
595 struct efa_dev *dev = to_edev(ibpd->device);
596 struct efa_ibv_create_qp_resp resp = {};
597 struct efa_ibv_create_qp cmd = {};
598 struct efa_ucontext *ucontext;
599 struct efa_qp *qp;
600 int err;
601
602 ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
603 ibucontext);
604
605 err = efa_qp_validate_cap(dev, init_attr);
606 if (err)
607 goto err_out;
608
609 err = efa_qp_validate_attr(dev, init_attr);
610 if (err)
611 goto err_out;
612
613 if (offsetofend(typeof(cmd), driver_qp_type) > udata->inlen) {
614 ibdev_dbg(&dev->ibdev,
615 "Incompatible ABI params, no input udata\n");
616 err = -EINVAL;
617 goto err_out;
618 }
619
620 if (udata->inlen > sizeof(cmd) &&
621 !ib_is_udata_cleared(udata, sizeof(cmd),
622 udata->inlen - sizeof(cmd))) {
623 ibdev_dbg(&dev->ibdev,
624 "Incompatible ABI params, unknown fields in udata\n");
625 err = -EINVAL;
626 goto err_out;
627 }
628
629 err = ib_copy_from_udata(&cmd, udata,
630 min(sizeof(cmd), udata->inlen));
631 if (err) {
632 ibdev_dbg(&dev->ibdev,
633 "Cannot copy udata for create_qp\n");
634 goto err_out;
635 }
636
637 if (cmd.comp_mask) {
638 ibdev_dbg(&dev->ibdev,
639 "Incompatible ABI params, unknown fields in udata\n");
640 err = -EINVAL;
641 goto err_out;
642 }
643
644 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
645 if (!qp) {
646 err = -ENOMEM;
647 goto err_out;
648 }
649
650 create_qp_params.uarn = ucontext->uarn;
651 create_qp_params.pd = to_epd(ibpd)->pdn;
652
653 if (init_attr->qp_type == IB_QPT_UD) {
654 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
655 } else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
656 create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
657 } else {
658 ibdev_dbg(&dev->ibdev,
659 "Unsupported qp type %d driver qp type %d\n",
660 init_attr->qp_type, cmd.driver_qp_type);
661 err = -EOPNOTSUPP;
662 goto err_free_qp;
663 }
664
665 ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
666 init_attr->qp_type, cmd.driver_qp_type);
667 create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
668 create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
669 create_qp_params.sq_depth = init_attr->cap.max_send_wr;
670 create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
671
672 create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
673 create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
674 qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
675 if (qp->rq_size) {
676 qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
677 qp->rq_size, DMA_TO_DEVICE);
678 if (!qp->rq_cpu_addr) {
679 err = -ENOMEM;
680 goto err_free_qp;
681 }
682
683 ibdev_dbg(&dev->ibdev,
684 "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
685 qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
686 create_qp_params.rq_base_addr = qp->rq_dma_addr;
687 }
688
689 err = efa_com_create_qp(&dev->edev, &create_qp_params,
690 &create_qp_resp);
691 if (err)
692 goto err_free_mapped;
693
694 resp.sq_db_offset = create_qp_resp.sq_db_offset;
695 resp.rq_db_offset = create_qp_resp.rq_db_offset;
696 resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
697 resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
698 resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
699
700 err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
701 &resp);
702 if (err)
703 goto err_destroy_qp;
704
705 qp->qp_handle = create_qp_resp.qp_handle;
706 qp->ibqp.qp_num = create_qp_resp.qp_num;
707 qp->ibqp.qp_type = init_attr->qp_type;
708 qp->max_send_wr = init_attr->cap.max_send_wr;
709 qp->max_recv_wr = init_attr->cap.max_recv_wr;
710 qp->max_send_sge = init_attr->cap.max_send_sge;
711 qp->max_recv_sge = init_attr->cap.max_recv_sge;
712 qp->max_inline_data = init_attr->cap.max_inline_data;
713
714 if (udata->outlen) {
715 err = ib_copy_to_udata(udata, &resp,
716 min(sizeof(resp), udata->outlen));
717 if (err) {
718 ibdev_dbg(&dev->ibdev,
719 "Failed to copy udata for qp[%u]\n",
720 create_qp_resp.qp_num);
721 goto err_remove_mmap_entries;
722 }
723 }
724
725 ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
726
727 return &qp->ibqp;
728
729err_remove_mmap_entries:
730 efa_qp_user_mmap_entries_remove(qp);
731err_destroy_qp:
732 efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
733err_free_mapped:
734 if (qp->rq_size)
735 efa_free_mapped(dev, qp->rq_cpu_addr, qp->rq_dma_addr,
736 qp->rq_size, DMA_TO_DEVICE);
737err_free_qp:
738 kfree(qp);
739err_out:
740 atomic64_inc(&dev->stats.sw_stats.create_qp_err);
741 return ERR_PTR(err);
742}
743
744static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
745 struct ib_qp_attr *qp_attr, int qp_attr_mask,
746 enum ib_qp_state cur_state,
747 enum ib_qp_state new_state)
748{
749#define EFA_MODIFY_QP_SUPP_MASK \
750 (IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
751 IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN)
752
753 if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
754 ibdev_dbg(&dev->ibdev,
755 "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
756 qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
757 return -EOPNOTSUPP;
758 }
759
760 if (!ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
761 qp_attr_mask)) {
762 ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
763 return -EINVAL;
764 }
765
766 if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
767 ibdev_dbg(&dev->ibdev, "Can't change port num\n");
768 return -EOPNOTSUPP;
769 }
770
771 if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
772 ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
773 return -EOPNOTSUPP;
774 }
775
776 return 0;
777}
778
779int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
780 int qp_attr_mask, struct ib_udata *udata)
781{
782 struct efa_dev *dev = to_edev(ibqp->device);
783 struct efa_com_modify_qp_params params = {};
784 struct efa_qp *qp = to_eqp(ibqp);
785 enum ib_qp_state cur_state;
786 enum ib_qp_state new_state;
787 int err;
788
789 if (udata->inlen &&
790 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
791 ibdev_dbg(&dev->ibdev,
792 "Incompatible ABI params, udata not cleared\n");
793 return -EINVAL;
794 }
795
796 cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
797 qp->state;
798 new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
799
800 err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
801 new_state);
802 if (err)
803 return err;
804
805 params.qp_handle = qp->qp_handle;
806
807 if (qp_attr_mask & IB_QP_STATE) {
808 params.modify_mask |= BIT(EFA_ADMIN_QP_STATE_BIT) |
809 BIT(EFA_ADMIN_CUR_QP_STATE_BIT);
810 params.cur_qp_state = qp_attr->cur_qp_state;
811 params.qp_state = qp_attr->qp_state;
812 }
813
814 if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
815 params.modify_mask |=
816 BIT(EFA_ADMIN_SQ_DRAINED_ASYNC_NOTIFY_BIT);
817 params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
818 }
819
820 if (qp_attr_mask & IB_QP_QKEY) {
821 params.modify_mask |= BIT(EFA_ADMIN_QKEY_BIT);
822 params.qkey = qp_attr->qkey;
823 }
824
825 if (qp_attr_mask & IB_QP_SQ_PSN) {
826 params.modify_mask |= BIT(EFA_ADMIN_SQ_PSN_BIT);
827 params.sq_psn = qp_attr->sq_psn;
828 }
829
830 err = efa_com_modify_qp(&dev->edev, ¶ms);
831 if (err)
832 return err;
833
834 qp->state = new_state;
835
836 return 0;
837}
838
839static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
840{
841 struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
842
843 return efa_com_destroy_cq(&dev->edev, ¶ms);
844}
845
846void efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
847{
848 struct efa_dev *dev = to_edev(ibcq->device);
849 struct efa_cq *cq = to_ecq(ibcq);
850
851 ibdev_dbg(&dev->ibdev,
852 "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
853 cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
854
855 rdma_user_mmap_entry_remove(cq->mmap_entry);
856 efa_destroy_cq_idx(dev, cq->cq_idx);
857 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
858 DMA_FROM_DEVICE);
859}
860
861static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
862 struct efa_ibv_create_cq_resp *resp)
863{
864 resp->q_mmap_size = cq->size;
865 cq->mmap_entry = efa_user_mmap_entry_insert(&cq->ucontext->ibucontext,
866 virt_to_phys(cq->cpu_addr),
867 cq->size, EFA_MMAP_DMA_PAGE,
868 &resp->q_mmap_key);
869 if (!cq->mmap_entry)
870 return -ENOMEM;
871
872 return 0;
873}
874
875int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
876 struct ib_udata *udata)
877{
878 struct efa_ucontext *ucontext = rdma_udata_to_drv_context(
879 udata, struct efa_ucontext, ibucontext);
880 struct efa_ibv_create_cq_resp resp = {};
881 struct efa_com_create_cq_params params;
882 struct efa_com_create_cq_result result;
883 struct ib_device *ibdev = ibcq->device;
884 struct efa_dev *dev = to_edev(ibdev);
885 struct efa_ibv_create_cq cmd = {};
886 struct efa_cq *cq = to_ecq(ibcq);
887 int entries = attr->cqe;
888 int err;
889
890 ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
891
892 if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
893 ibdev_dbg(ibdev,
894 "cq: requested entries[%u] non-positive or greater than max[%u]\n",
895 entries, dev->dev_attr.max_cq_depth);
896 err = -EINVAL;
897 goto err_out;
898 }
899
900 if (offsetofend(typeof(cmd), num_sub_cqs) > udata->inlen) {
901 ibdev_dbg(ibdev,
902 "Incompatible ABI params, no input udata\n");
903 err = -EINVAL;
904 goto err_out;
905 }
906
907 if (udata->inlen > sizeof(cmd) &&
908 !ib_is_udata_cleared(udata, sizeof(cmd),
909 udata->inlen - sizeof(cmd))) {
910 ibdev_dbg(ibdev,
911 "Incompatible ABI params, unknown fields in udata\n");
912 err = -EINVAL;
913 goto err_out;
914 }
915
916 err = ib_copy_from_udata(&cmd, udata,
917 min(sizeof(cmd), udata->inlen));
918 if (err) {
919 ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
920 goto err_out;
921 }
922
923 if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_50)) {
924 ibdev_dbg(ibdev,
925 "Incompatible ABI params, unknown fields in udata\n");
926 err = -EINVAL;
927 goto err_out;
928 }
929
930 if (!cmd.cq_entry_size) {
931 ibdev_dbg(ibdev,
932 "Invalid entry size [%u]\n", cmd.cq_entry_size);
933 err = -EINVAL;
934 goto err_out;
935 }
936
937 if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
938 ibdev_dbg(ibdev,
939 "Invalid number of sub cqs[%u] expected[%u]\n",
940 cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
941 err = -EINVAL;
942 goto err_out;
943 }
944
945 cq->ucontext = ucontext;
946 cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
947 cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
948 DMA_FROM_DEVICE);
949 if (!cq->cpu_addr) {
950 err = -ENOMEM;
951 goto err_out;
952 }
953
954 params.uarn = cq->ucontext->uarn;
955 params.cq_depth = entries;
956 params.dma_addr = cq->dma_addr;
957 params.entry_size_in_bytes = cmd.cq_entry_size;
958 params.num_sub_cqs = cmd.num_sub_cqs;
959 err = efa_com_create_cq(&dev->edev, ¶ms, &result);
960 if (err)
961 goto err_free_mapped;
962
963 resp.cq_idx = result.cq_idx;
964 cq->cq_idx = result.cq_idx;
965 cq->ibcq.cqe = result.actual_depth;
966 WARN_ON_ONCE(entries != result.actual_depth);
967
968 err = cq_mmap_entries_setup(dev, cq, &resp);
969 if (err) {
970 ibdev_dbg(ibdev, "Could not setup cq[%u] mmap entries\n",
971 cq->cq_idx);
972 goto err_destroy_cq;
973 }
974
975 if (udata->outlen) {
976 err = ib_copy_to_udata(udata, &resp,
977 min(sizeof(resp), udata->outlen));
978 if (err) {
979 ibdev_dbg(ibdev,
980 "Failed to copy udata for create_cq\n");
981 goto err_remove_mmap;
982 }
983 }
984
985 ibdev_dbg(ibdev, "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
986 cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
987
988 return 0;
989
990err_remove_mmap:
991 rdma_user_mmap_entry_remove(cq->mmap_entry);
992err_destroy_cq:
993 efa_destroy_cq_idx(dev, cq->cq_idx);
994err_free_mapped:
995 efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
996 DMA_FROM_DEVICE);
997
998err_out:
999 atomic64_inc(&dev->stats.sw_stats.create_cq_err);
1000 return err;
1001}
1002
1003static int umem_to_page_list(struct efa_dev *dev,
1004 struct ib_umem *umem,
1005 u64 *page_list,
1006 u32 hp_cnt,
1007 u8 hp_shift)
1008{
1009 u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
1010 struct ib_block_iter biter;
1011 unsigned int hp_idx = 0;
1012
1013 ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
1014 hp_cnt, pages_in_hp);
1015
1016 rdma_for_each_block(umem->sg_head.sgl, &biter, umem->nmap,
1017 BIT(hp_shift))
1018 page_list[hp_idx++] = rdma_block_iter_dma_address(&biter);
1019
1020 return 0;
1021}
1022
1023static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
1024{
1025 struct scatterlist *sglist;
1026 struct page *pg;
1027 int i;
1028
1029 sglist = kcalloc(page_cnt, sizeof(*sglist), GFP_KERNEL);
1030 if (!sglist)
1031 return NULL;
1032 sg_init_table(sglist, page_cnt);
1033 for (i = 0; i < page_cnt; i++) {
1034 pg = vmalloc_to_page(buf);
1035 if (!pg)
1036 goto err;
1037 sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
1038 buf += PAGE_SIZE / sizeof(*buf);
1039 }
1040 return sglist;
1041
1042err:
1043 kfree(sglist);
1044 return NULL;
1045}
1046
1047/*
1048 * create a chunk list of physical pages dma addresses from the supplied
1049 * scatter gather list
1050 */
1051static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
1052{
1053 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1054 int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
1055 struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
1056 unsigned int chunk_list_size, chunk_idx, payload_idx;
1057 int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
1058 struct efa_com_ctrl_buff_info *ctrl_buf;
1059 u64 *cur_chunk_buf, *prev_chunk_buf;
1060 struct ib_block_iter biter;
1061 dma_addr_t dma_addr;
1062 int i;
1063
1064 /* allocate a chunk list that consists of 4KB chunks */
1065 chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
1066
1067 chunk_list->size = chunk_list_size;
1068 chunk_list->chunks = kcalloc(chunk_list_size,
1069 sizeof(*chunk_list->chunks),
1070 GFP_KERNEL);
1071 if (!chunk_list->chunks)
1072 return -ENOMEM;
1073
1074 ibdev_dbg(&dev->ibdev,
1075 "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
1076 page_cnt);
1077
1078 /* allocate chunk buffers: */
1079 for (i = 0; i < chunk_list_size; i++) {
1080 chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
1081 if (!chunk_list->chunks[i].buf)
1082 goto chunk_list_dealloc;
1083
1084 chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
1085 }
1086 chunk_list->chunks[chunk_list_size - 1].length =
1087 ((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
1088 EFA_CHUNK_PTR_SIZE;
1089
1090 /* fill the dma addresses of sg list pages to chunks: */
1091 chunk_idx = 0;
1092 payload_idx = 0;
1093 cur_chunk_buf = chunk_list->chunks[0].buf;
1094 rdma_for_each_block(pages_sgl, &biter, sg_dma_cnt,
1095 EFA_CHUNK_PAYLOAD_SIZE) {
1096 cur_chunk_buf[payload_idx++] =
1097 rdma_block_iter_dma_address(&biter);
1098
1099 if (payload_idx == EFA_PTRS_PER_CHUNK) {
1100 chunk_idx++;
1101 cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
1102 payload_idx = 0;
1103 }
1104 }
1105
1106 /* map chunks to dma and fill chunks next ptrs */
1107 for (i = chunk_list_size - 1; i >= 0; i--) {
1108 dma_addr = dma_map_single(&dev->pdev->dev,
1109 chunk_list->chunks[i].buf,
1110 chunk_list->chunks[i].length,
1111 DMA_TO_DEVICE);
1112 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1113 ibdev_err(&dev->ibdev,
1114 "chunk[%u] dma_map_failed\n", i);
1115 goto chunk_list_unmap;
1116 }
1117
1118 chunk_list->chunks[i].dma_addr = dma_addr;
1119 ibdev_dbg(&dev->ibdev,
1120 "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
1121
1122 if (!i)
1123 break;
1124
1125 prev_chunk_buf = chunk_list->chunks[i - 1].buf;
1126
1127 ctrl_buf = (struct efa_com_ctrl_buff_info *)
1128 &prev_chunk_buf[EFA_PTRS_PER_CHUNK];
1129 ctrl_buf->length = chunk_list->chunks[i].length;
1130
1131 efa_com_set_dma_addr(dma_addr,
1132 &ctrl_buf->address.mem_addr_high,
1133 &ctrl_buf->address.mem_addr_low);
1134 }
1135
1136 return 0;
1137
1138chunk_list_unmap:
1139 for (; i < chunk_list_size; i++) {
1140 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1141 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1142 }
1143chunk_list_dealloc:
1144 for (i = 0; i < chunk_list_size; i++)
1145 kfree(chunk_list->chunks[i].buf);
1146
1147 kfree(chunk_list->chunks);
1148 return -ENOMEM;
1149}
1150
1151static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1152{
1153 struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
1154 int i;
1155
1156 for (i = 0; i < chunk_list->size; i++) {
1157 dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
1158 chunk_list->chunks[i].length, DMA_TO_DEVICE);
1159 kfree(chunk_list->chunks[i].buf);
1160 }
1161
1162 kfree(chunk_list->chunks);
1163}
1164
1165/* initialize pbl continuous mode: map pbl buffer to a dma address. */
1166static int pbl_continuous_initialize(struct efa_dev *dev,
1167 struct pbl_context *pbl)
1168{
1169 dma_addr_t dma_addr;
1170
1171 dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
1172 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1173 if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
1174 ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
1175 return -ENOMEM;
1176 }
1177
1178 pbl->phys.continuous.dma_addr = dma_addr;
1179 ibdev_dbg(&dev->ibdev,
1180 "pbl continuous - dma_addr = %pad, size[%u]\n",
1181 &dma_addr, pbl->pbl_buf_size_in_bytes);
1182
1183 return 0;
1184}
1185
1186/*
1187 * initialize pbl indirect mode:
1188 * create a chunk list out of the dma addresses of the physical pages of
1189 * pbl buffer.
1190 */
1191static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
1192{
1193 u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, PAGE_SIZE);
1194 struct scatterlist *sgl;
1195 int sg_dma_cnt, err;
1196
1197 BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
1198 sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
1199 if (!sgl)
1200 return -ENOMEM;
1201
1202 sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1203 if (!sg_dma_cnt) {
1204 err = -EINVAL;
1205 goto err_map;
1206 }
1207
1208 pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
1209 pbl->phys.indirect.sgl = sgl;
1210 pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
1211 err = pbl_chunk_list_create(dev, pbl);
1212 if (err) {
1213 ibdev_dbg(&dev->ibdev,
1214 "chunk_list creation failed[%d]\n", err);
1215 goto err_chunk;
1216 }
1217
1218 ibdev_dbg(&dev->ibdev,
1219 "pbl indirect - size[%u], chunks[%u]\n",
1220 pbl->pbl_buf_size_in_bytes,
1221 pbl->phys.indirect.chunk_list.size);
1222
1223 return 0;
1224
1225err_chunk:
1226 dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
1227err_map:
1228 kfree(sgl);
1229 return err;
1230}
1231
1232static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
1233{
1234 pbl_chunk_list_destroy(dev, pbl);
1235 dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
1236 pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
1237 kfree(pbl->phys.indirect.sgl);
1238}
1239
1240/* create a page buffer list from a mapped user memory region */
1241static int pbl_create(struct efa_dev *dev,
1242 struct pbl_context *pbl,
1243 struct ib_umem *umem,
1244 int hp_cnt,
1245 u8 hp_shift)
1246{
1247 int err;
1248
1249 pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
1250 pbl->pbl_buf = kvzalloc(pbl->pbl_buf_size_in_bytes, GFP_KERNEL);
1251 if (!pbl->pbl_buf)
1252 return -ENOMEM;
1253
1254 if (is_vmalloc_addr(pbl->pbl_buf)) {
1255 pbl->physically_continuous = 0;
1256 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1257 hp_shift);
1258 if (err)
1259 goto err_free;
1260
1261 err = pbl_indirect_initialize(dev, pbl);
1262 if (err)
1263 goto err_free;
1264 } else {
1265 pbl->physically_continuous = 1;
1266 err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
1267 hp_shift);
1268 if (err)
1269 goto err_free;
1270
1271 err = pbl_continuous_initialize(dev, pbl);
1272 if (err)
1273 goto err_free;
1274 }
1275
1276 ibdev_dbg(&dev->ibdev,
1277 "user_pbl_created: user_pages[%u], continuous[%u]\n",
1278 hp_cnt, pbl->physically_continuous);
1279
1280 return 0;
1281
1282err_free:
1283 kvfree(pbl->pbl_buf);
1284 return err;
1285}
1286
1287static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
1288{
1289 if (pbl->physically_continuous)
1290 dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
1291 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
1292 else
1293 pbl_indirect_terminate(dev, pbl);
1294
1295 kvfree(pbl->pbl_buf);
1296}
1297
1298static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
1299 struct efa_com_reg_mr_params *params)
1300{
1301 int err;
1302
1303 params->inline_pbl = 1;
1304 err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
1305 params->page_num, params->page_shift);
1306 if (err)
1307 return err;
1308
1309 ibdev_dbg(&dev->ibdev,
1310 "inline_pbl_array - pages[%u]\n", params->page_num);
1311
1312 return 0;
1313}
1314
1315static int efa_create_pbl(struct efa_dev *dev,
1316 struct pbl_context *pbl,
1317 struct efa_mr *mr,
1318 struct efa_com_reg_mr_params *params)
1319{
1320 int err;
1321
1322 err = pbl_create(dev, pbl, mr->umem, params->page_num,
1323 params->page_shift);
1324 if (err) {
1325 ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
1326 return err;
1327 }
1328
1329 params->inline_pbl = 0;
1330 params->indirect = !pbl->physically_continuous;
1331 if (pbl->physically_continuous) {
1332 params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
1333
1334 efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
1335 ¶ms->pbl.pbl.address.mem_addr_high,
1336 ¶ms->pbl.pbl.address.mem_addr_low);
1337 } else {
1338 params->pbl.pbl.length =
1339 pbl->phys.indirect.chunk_list.chunks[0].length;
1340
1341 efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
1342 ¶ms->pbl.pbl.address.mem_addr_high,
1343 ¶ms->pbl.pbl.address.mem_addr_low);
1344 }
1345
1346 return 0;
1347}
1348
1349struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
1350 u64 virt_addr, int access_flags,
1351 struct ib_udata *udata)
1352{
1353 struct efa_dev *dev = to_edev(ibpd->device);
1354 struct efa_com_reg_mr_params params = {};
1355 struct efa_com_reg_mr_result result = {};
1356 struct pbl_context pbl;
1357 int supp_access_flags;
1358 unsigned int pg_sz;
1359 struct efa_mr *mr;
1360 int inline_size;
1361 int err;
1362
1363 if (udata && udata->inlen &&
1364 !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
1365 ibdev_dbg(&dev->ibdev,
1366 "Incompatible ABI params, udata not cleared\n");
1367 err = -EINVAL;
1368 goto err_out;
1369 }
1370
1371 supp_access_flags =
1372 IB_ACCESS_LOCAL_WRITE |
1373 (is_rdma_read_cap(dev) ? IB_ACCESS_REMOTE_READ : 0);
1374
1375 access_flags &= ~IB_ACCESS_OPTIONAL;
1376 if (access_flags & ~supp_access_flags) {
1377 ibdev_dbg(&dev->ibdev,
1378 "Unsupported access flags[%#x], supported[%#x]\n",
1379 access_flags, supp_access_flags);
1380 err = -EOPNOTSUPP;
1381 goto err_out;
1382 }
1383
1384 mr = kzalloc(sizeof(*mr), GFP_KERNEL);
1385 if (!mr) {
1386 err = -ENOMEM;
1387 goto err_out;
1388 }
1389
1390 mr->umem = ib_umem_get(ibpd->device, start, length, access_flags);
1391 if (IS_ERR(mr->umem)) {
1392 err = PTR_ERR(mr->umem);
1393 ibdev_dbg(&dev->ibdev,
1394 "Failed to pin and map user space memory[%d]\n", err);
1395 goto err_free;
1396 }
1397
1398 params.pd = to_epd(ibpd)->pdn;
1399 params.iova = virt_addr;
1400 params.mr_length_in_bytes = length;
1401 params.permissions = access_flags;
1402
1403 pg_sz = ib_umem_find_best_pgsz(mr->umem,
1404 dev->dev_attr.page_size_cap,
1405 virt_addr);
1406 if (!pg_sz) {
1407 err = -EOPNOTSUPP;
1408 ibdev_dbg(&dev->ibdev, "Failed to find a suitable page size in page_size_cap %#llx\n",
1409 dev->dev_attr.page_size_cap);
1410 goto err_unmap;
1411 }
1412
1413 params.page_shift = __ffs(pg_sz);
1414 params.page_num = DIV_ROUND_UP(length + (start & (pg_sz - 1)),
1415 pg_sz);
1416
1417 ibdev_dbg(&dev->ibdev,
1418 "start %#llx length %#llx params.page_shift %u params.page_num %u\n",
1419 start, length, params.page_shift, params.page_num);
1420
1421 inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
1422 if (params.page_num <= inline_size) {
1423 err = efa_create_inline_pbl(dev, mr, ¶ms);
1424 if (err)
1425 goto err_unmap;
1426
1427 err = efa_com_register_mr(&dev->edev, ¶ms, &result);
1428 if (err)
1429 goto err_unmap;
1430 } else {
1431 err = efa_create_pbl(dev, &pbl, mr, ¶ms);
1432 if (err)
1433 goto err_unmap;
1434
1435 err = efa_com_register_mr(&dev->edev, ¶ms, &result);
1436 pbl_destroy(dev, &pbl);
1437
1438 if (err)
1439 goto err_unmap;
1440 }
1441
1442 mr->ibmr.lkey = result.l_key;
1443 mr->ibmr.rkey = result.r_key;
1444 mr->ibmr.length = length;
1445 ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
1446
1447 return &mr->ibmr;
1448
1449err_unmap:
1450 ib_umem_release(mr->umem);
1451err_free:
1452 kfree(mr);
1453err_out:
1454 atomic64_inc(&dev->stats.sw_stats.reg_mr_err);
1455 return ERR_PTR(err);
1456}
1457
1458int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
1459{
1460 struct efa_dev *dev = to_edev(ibmr->device);
1461 struct efa_com_dereg_mr_params params;
1462 struct efa_mr *mr = to_emr(ibmr);
1463 int err;
1464
1465 ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
1466
1467 params.l_key = mr->ibmr.lkey;
1468 err = efa_com_dereg_mr(&dev->edev, ¶ms);
1469 if (err)
1470 return err;
1471
1472 ib_umem_release(mr->umem);
1473 kfree(mr);
1474
1475 return 0;
1476}
1477
1478int efa_get_port_immutable(struct ib_device *ibdev, u8 port_num,
1479 struct ib_port_immutable *immutable)
1480{
1481 struct ib_port_attr attr;
1482 int err;
1483
1484 err = ib_query_port(ibdev, port_num, &attr);
1485 if (err) {
1486 ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
1487 return err;
1488 }
1489
1490 immutable->pkey_tbl_len = attr.pkey_tbl_len;
1491 immutable->gid_tbl_len = attr.gid_tbl_len;
1492
1493 return 0;
1494}
1495
1496static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
1497{
1498 struct efa_com_dealloc_uar_params params = {
1499 .uarn = uarn,
1500 };
1501
1502 return efa_com_dealloc_uar(&dev->edev, ¶ms);
1503}
1504
1505#define EFA_CHECK_USER_COMP(_dev, _comp_mask, _attr, _mask, _attr_str) \
1506 (_attr_str = (!(_dev)->dev_attr._attr || ((_comp_mask) & (_mask))) ? \
1507 NULL : #_attr)
1508
1509static int efa_user_comp_handshake(const struct ib_ucontext *ibucontext,
1510 const struct efa_ibv_alloc_ucontext_cmd *cmd)
1511{
1512 struct efa_dev *dev = to_edev(ibucontext->device);
1513 char *attr_str;
1514
1515 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, max_tx_batch,
1516 EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH, attr_str))
1517 goto err;
1518
1519 if (EFA_CHECK_USER_COMP(dev, cmd->comp_mask, min_sq_depth,
1520 EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR,
1521 attr_str))
1522 goto err;
1523
1524 return 0;
1525
1526err:
1527 ibdev_dbg(&dev->ibdev, "Userspace handshake failed for %s attribute\n",
1528 attr_str);
1529 return -EOPNOTSUPP;
1530}
1531
1532int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
1533{
1534 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1535 struct efa_dev *dev = to_edev(ibucontext->device);
1536 struct efa_ibv_alloc_ucontext_resp resp = {};
1537 struct efa_ibv_alloc_ucontext_cmd cmd = {};
1538 struct efa_com_alloc_uar_result result;
1539 int err;
1540
1541 /*
1542 * it's fine if the driver does not know all request fields,
1543 * we will ack input fields in our response.
1544 */
1545
1546 err = ib_copy_from_udata(&cmd, udata,
1547 min(sizeof(cmd), udata->inlen));
1548 if (err) {
1549 ibdev_dbg(&dev->ibdev,
1550 "Cannot copy udata for alloc_ucontext\n");
1551 goto err_out;
1552 }
1553
1554 err = efa_user_comp_handshake(ibucontext, &cmd);
1555 if (err)
1556 goto err_out;
1557
1558 err = efa_com_alloc_uar(&dev->edev, &result);
1559 if (err)
1560 goto err_out;
1561
1562 ucontext->uarn = result.uarn;
1563
1564 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
1565 resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
1566 resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
1567 resp.inline_buf_size = dev->dev_attr.inline_buf_size;
1568 resp.max_llq_size = dev->dev_attr.max_llq_size;
1569 resp.max_tx_batch = dev->dev_attr.max_tx_batch;
1570 resp.min_sq_wr = dev->dev_attr.min_sq_depth;
1571
1572 if (udata && udata->outlen) {
1573 err = ib_copy_to_udata(udata, &resp,
1574 min(sizeof(resp), udata->outlen));
1575 if (err)
1576 goto err_dealloc_uar;
1577 }
1578
1579 return 0;
1580
1581err_dealloc_uar:
1582 efa_dealloc_uar(dev, result.uarn);
1583err_out:
1584 atomic64_inc(&dev->stats.sw_stats.alloc_ucontext_err);
1585 return err;
1586}
1587
1588void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
1589{
1590 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1591 struct efa_dev *dev = to_edev(ibucontext->device);
1592
1593 efa_dealloc_uar(dev, ucontext->uarn);
1594}
1595
1596void efa_mmap_free(struct rdma_user_mmap_entry *rdma_entry)
1597{
1598 struct efa_user_mmap_entry *entry = to_emmap(rdma_entry);
1599
1600 kfree(entry);
1601}
1602
1603static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
1604 struct vm_area_struct *vma)
1605{
1606 struct rdma_user_mmap_entry *rdma_entry;
1607 struct efa_user_mmap_entry *entry;
1608 unsigned long va;
1609 int err = 0;
1610 u64 pfn;
1611
1612 rdma_entry = rdma_user_mmap_entry_get(&ucontext->ibucontext, vma);
1613 if (!rdma_entry) {
1614 ibdev_dbg(&dev->ibdev,
1615 "pgoff[%#lx] does not have valid entry\n",
1616 vma->vm_pgoff);
1617 atomic64_inc(&dev->stats.sw_stats.mmap_err);
1618 return -EINVAL;
1619 }
1620 entry = to_emmap(rdma_entry);
1621
1622 ibdev_dbg(&dev->ibdev,
1623 "Mapping address[%#llx], length[%#zx], mmap_flag[%d]\n",
1624 entry->address, rdma_entry->npages * PAGE_SIZE,
1625 entry->mmap_flag);
1626
1627 pfn = entry->address >> PAGE_SHIFT;
1628 switch (entry->mmap_flag) {
1629 case EFA_MMAP_IO_NC:
1630 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
1631 entry->rdma_entry.npages * PAGE_SIZE,
1632 pgprot_noncached(vma->vm_page_prot),
1633 rdma_entry);
1634 break;
1635 case EFA_MMAP_IO_WC:
1636 err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn,
1637 entry->rdma_entry.npages * PAGE_SIZE,
1638 pgprot_writecombine(vma->vm_page_prot),
1639 rdma_entry);
1640 break;
1641 case EFA_MMAP_DMA_PAGE:
1642 for (va = vma->vm_start; va < vma->vm_end;
1643 va += PAGE_SIZE, pfn++) {
1644 err = vm_insert_page(vma, va, pfn_to_page(pfn));
1645 if (err)
1646 break;
1647 }
1648 break;
1649 default:
1650 err = -EINVAL;
1651 }
1652
1653 if (err) {
1654 ibdev_dbg(
1655 &dev->ibdev,
1656 "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n",
1657 entry->address, rdma_entry->npages * PAGE_SIZE,
1658 entry->mmap_flag, err);
1659 atomic64_inc(&dev->stats.sw_stats.mmap_err);
1660 }
1661
1662 rdma_user_mmap_entry_put(rdma_entry);
1663 return err;
1664}
1665
1666int efa_mmap(struct ib_ucontext *ibucontext,
1667 struct vm_area_struct *vma)
1668{
1669 struct efa_ucontext *ucontext = to_eucontext(ibucontext);
1670 struct efa_dev *dev = to_edev(ibucontext->device);
1671 size_t length = vma->vm_end - vma->vm_start;
1672
1673 ibdev_dbg(&dev->ibdev,
1674 "start %#lx, end %#lx, length = %#zx, pgoff = %#lx\n",
1675 vma->vm_start, vma->vm_end, length, vma->vm_pgoff);
1676
1677 return __efa_mmap(dev, ucontext, vma);
1678}
1679
1680static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
1681{
1682 struct efa_com_destroy_ah_params params = {
1683 .ah = ah->ah,
1684 .pdn = to_epd(ah->ibah.pd)->pdn,
1685 };
1686
1687 return efa_com_destroy_ah(&dev->edev, ¶ms);
1688}
1689
1690int efa_create_ah(struct ib_ah *ibah,
1691 struct rdma_ah_init_attr *init_attr,
1692 struct ib_udata *udata)
1693{
1694 struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
1695 struct efa_dev *dev = to_edev(ibah->device);
1696 struct efa_com_create_ah_params params = {};
1697 struct efa_ibv_create_ah_resp resp = {};
1698 struct efa_com_create_ah_result result;
1699 struct efa_ah *ah = to_eah(ibah);
1700 int err;
1701
1702 if (!(init_attr->flags & RDMA_CREATE_AH_SLEEPABLE)) {
1703 ibdev_dbg(&dev->ibdev,
1704 "Create address handle is not supported in atomic context\n");
1705 err = -EOPNOTSUPP;
1706 goto err_out;
1707 }
1708
1709 if (udata->inlen &&
1710 !ib_is_udata_cleared(udata, 0, udata->inlen)) {
1711 ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
1712 err = -EINVAL;
1713 goto err_out;
1714 }
1715
1716 memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
1717 sizeof(params.dest_addr));
1718 params.pdn = to_epd(ibah->pd)->pdn;
1719 err = efa_com_create_ah(&dev->edev, ¶ms, &result);
1720 if (err)
1721 goto err_out;
1722
1723 memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
1724 ah->ah = result.ah;
1725
1726 resp.efa_address_handle = result.ah;
1727
1728 if (udata->outlen) {
1729 err = ib_copy_to_udata(udata, &resp,
1730 min(sizeof(resp), udata->outlen));
1731 if (err) {
1732 ibdev_dbg(&dev->ibdev,
1733 "Failed to copy udata for create_ah response\n");
1734 goto err_destroy_ah;
1735 }
1736 }
1737 ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
1738
1739 return 0;
1740
1741err_destroy_ah:
1742 efa_ah_destroy(dev, ah);
1743err_out:
1744 atomic64_inc(&dev->stats.sw_stats.create_ah_err);
1745 return err;
1746}
1747
1748void efa_destroy_ah(struct ib_ah *ibah, u32 flags)
1749{
1750 struct efa_dev *dev = to_edev(ibah->pd->device);
1751 struct efa_ah *ah = to_eah(ibah);
1752
1753 ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
1754
1755 if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
1756 ibdev_dbg(&dev->ibdev,
1757 "Destroy address handle is not supported in atomic context\n");
1758 return;
1759 }
1760
1761 efa_ah_destroy(dev, ah);
1762}
1763
1764struct rdma_hw_stats *efa_alloc_hw_stats(struct ib_device *ibdev, u8 port_num)
1765{
1766 return rdma_alloc_hw_stats_struct(efa_stats_names,
1767 ARRAY_SIZE(efa_stats_names),
1768 RDMA_HW_STATS_DEFAULT_LIFESPAN);
1769}
1770
1771int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats,
1772 u8 port_num, int index)
1773{
1774 struct efa_com_get_stats_params params = {};
1775 union efa_com_get_stats_result result;
1776 struct efa_dev *dev = to_edev(ibdev);
1777 struct efa_com_basic_stats *bs;
1778 struct efa_com_stats_admin *as;
1779 struct efa_stats *s;
1780 int err;
1781
1782 params.type = EFA_ADMIN_GET_STATS_TYPE_BASIC;
1783 params.scope = EFA_ADMIN_GET_STATS_SCOPE_ALL;
1784
1785 err = efa_com_get_stats(&dev->edev, ¶ms, &result);
1786 if (err)
1787 return err;
1788
1789 bs = &result.basic_stats;
1790 stats->value[EFA_TX_BYTES] = bs->tx_bytes;
1791 stats->value[EFA_TX_PKTS] = bs->tx_pkts;
1792 stats->value[EFA_RX_BYTES] = bs->rx_bytes;
1793 stats->value[EFA_RX_PKTS] = bs->rx_pkts;
1794 stats->value[EFA_RX_DROPS] = bs->rx_drops;
1795
1796 as = &dev->edev.aq.stats;
1797 stats->value[EFA_SUBMITTED_CMDS] = atomic64_read(&as->submitted_cmd);
1798 stats->value[EFA_COMPLETED_CMDS] = atomic64_read(&as->completed_cmd);
1799 stats->value[EFA_CMDS_ERR] = atomic64_read(&as->cmd_err);
1800 stats->value[EFA_NO_COMPLETION_CMDS] = atomic64_read(&as->no_completion);
1801
1802 s = &dev->stats;
1803 stats->value[EFA_KEEP_ALIVE_RCVD] = atomic64_read(&s->keep_alive_rcvd);
1804 stats->value[EFA_ALLOC_PD_ERR] = atomic64_read(&s->sw_stats.alloc_pd_err);
1805 stats->value[EFA_CREATE_QP_ERR] = atomic64_read(&s->sw_stats.create_qp_err);
1806 stats->value[EFA_CREATE_CQ_ERR] = atomic64_read(&s->sw_stats.create_cq_err);
1807 stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->sw_stats.reg_mr_err);
1808 stats->value[EFA_ALLOC_UCONTEXT_ERR] = atomic64_read(&s->sw_stats.alloc_ucontext_err);
1809 stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->sw_stats.create_ah_err);
1810 stats->value[EFA_MMAP_ERR] = atomic64_read(&s->sw_stats.mmap_err);
1811
1812 return ARRAY_SIZE(efa_stats_names);
1813}
1814
1815enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
1816 u8 port_num)
1817{
1818 return IB_LINK_LAYER_UNSPECIFIED;
1819}
1820