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net/mlx5_core: Move completion eqs from mlx5_ib to mlx5_core
[deliverable/linux.git] / drivers / infiniband / hw / mlx5 / cq.c
CommitLineData
e126ba97 1/*
6cf0a15f 2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
e126ba97
EC		 3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#include <linux/kref.h>
34#include <rdma/ib_umem.h>
a8237b32 35#include <rdma/ib_user_verbs.h>
e126ba97
EC		 36#include "mlx5_ib.h"
37#include "user.h"
38
39static void mlx5_ib_cq_comp(struct mlx5_core_cq *cq)
40{
41 struct ib_cq *ibcq = &to_mibcq(cq)->ibcq;
42
43 ibcq->comp_handler(ibcq, ibcq->cq_context);
44}
45
46static void mlx5_ib_cq_event(struct mlx5_core_cq *mcq, enum mlx5_event type)
47{
48 struct mlx5_ib_cq *cq = container_of(mcq, struct mlx5_ib_cq, mcq);
49 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device);
50 struct ib_cq *ibcq = &cq->ibcq;
51 struct ib_event event;
52
53 if (type != MLX5_EVENT_TYPE_CQ_ERROR) {
54 mlx5_ib_warn(dev, "Unexpected event type %d on CQ %06x\n",
55 type, mcq->cqn);
56 return;
57 }
58
59 if (ibcq->event_handler) {
60 event.device = &dev->ib_dev;
61 event.event = IB_EVENT_CQ_ERR;
62 event.element.cq = ibcq;
63 ibcq->event_handler(&event, ibcq->cq_context);
64 }
65}
66
67static void *get_cqe_from_buf(struct mlx5_ib_cq_buf *buf, int n, int size)
68{
69 return mlx5_buf_offset(&buf->buf, n * size);
70}
71
72static void *get_cqe(struct mlx5_ib_cq *cq, int n)
73{
74 return get_cqe_from_buf(&cq->buf, n, cq->mcq.cqe_sz);
75}
76
bde51583
EC		 77static u8 sw_ownership_bit(int n, int nent)
78{
79 return (n & nent) ? 1 : 0;
80}
81
e126ba97
EC		 82static void *get_sw_cqe(struct mlx5_ib_cq *cq, int n)
83{
84 void *cqe = get_cqe(cq, n & cq->ibcq.cqe);
85 struct mlx5_cqe64 *cqe64;
86
87 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64;
bde51583
EC		 88
89 if (likely((cqe64->op_own) >> 4 != MLX5_CQE_INVALID) &&
90 !((cqe64->op_own & MLX5_CQE_OWNER_MASK) ^ !!(n & (cq->ibcq.cqe + 1)))) {
91 return cqe;
92 } else {
93 return NULL;
94 }
e126ba97
EC		 95}
96
97static void *next_cqe_sw(struct mlx5_ib_cq *cq)
98{
99 return get_sw_cqe(cq, cq->mcq.cons_index);
100}
101
102static enum ib_wc_opcode get_umr_comp(struct mlx5_ib_wq *wq, int idx)
103{
104 switch (wq->wr_data[idx]) {
105 case MLX5_IB_WR_UMR:
106 return 0;
107
108 case IB_WR_LOCAL_INV:
109 return IB_WC_LOCAL_INV;
110
111 case IB_WR_FAST_REG_MR:
112 return IB_WC_FAST_REG_MR;
113
114 default:
115 pr_warn("unknown completion status\n");
116 return 0;
117 }
118}
119
120static void handle_good_req(struct ib_wc *wc, struct mlx5_cqe64 *cqe,
121 struct mlx5_ib_wq *wq, int idx)
122{
123 wc->wc_flags = 0;
124 switch (be32_to_cpu(cqe->sop_drop_qpn) >> 24) {
125 case MLX5_OPCODE_RDMA_WRITE_IMM:
126 wc->wc_flags |= IB_WC_WITH_IMM;
127 case MLX5_OPCODE_RDMA_WRITE:
128 wc->opcode = IB_WC_RDMA_WRITE;
129 break;
130 case MLX5_OPCODE_SEND_IMM:
131 wc->wc_flags |= IB_WC_WITH_IMM;
132 case MLX5_OPCODE_SEND:
133 case MLX5_OPCODE_SEND_INVAL:
134 wc->opcode = IB_WC_SEND;
135 break;
136 case MLX5_OPCODE_RDMA_READ:
137 wc->opcode = IB_WC_RDMA_READ;
138 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
139 break;
140 case MLX5_OPCODE_ATOMIC_CS:
141 wc->opcode = IB_WC_COMP_SWAP;
142 wc->byte_len = 8;
143 break;
144 case MLX5_OPCODE_ATOMIC_FA:
145 wc->opcode = IB_WC_FETCH_ADD;
146 wc->byte_len = 8;
147 break;
148 case MLX5_OPCODE_ATOMIC_MASKED_CS:
149 wc->opcode = IB_WC_MASKED_COMP_SWAP;
150 wc->byte_len = 8;
151 break;
152 case MLX5_OPCODE_ATOMIC_MASKED_FA:
153 wc->opcode = IB_WC_MASKED_FETCH_ADD;
154 wc->byte_len = 8;
155 break;
156 case MLX5_OPCODE_BIND_MW:
157 wc->opcode = IB_WC_BIND_MW;
158 break;
159 case MLX5_OPCODE_UMR:
160 wc->opcode = get_umr_comp(wq, idx);
161 break;
162 }
163}
164
165enum {
166 MLX5_GRH_IN_BUFFER = 1,
167 MLX5_GRH_IN_CQE = 2,
168};
169
170static void handle_responder(struct ib_wc *wc, struct mlx5_cqe64 *cqe,
171 struct mlx5_ib_qp *qp)
172{
173 struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.device);
174 struct mlx5_ib_srq *srq;
175 struct mlx5_ib_wq *wq;
176 u16 wqe_ctr;
177 u8 g;
178
179 if (qp->ibqp.srq || qp->ibqp.xrcd) {
180 struct mlx5_core_srq *msrq = NULL;
181
182 if (qp->ibqp.xrcd) {
9603b61d 183 msrq = mlx5_core_get_srq(dev->mdev,
e126ba97
EC		 184 be32_to_cpu(cqe->srqn));
185 srq = to_mibsrq(msrq);
186 } else {
187 srq = to_msrq(qp->ibqp.srq);
188 }
189 if (srq) {
190 wqe_ctr = be16_to_cpu(cqe->wqe_counter);
191 wc->wr_id = srq->wrid[wqe_ctr];
192 mlx5_ib_free_srq_wqe(srq, wqe_ctr);
193 if (msrq && atomic_dec_and_test(&msrq->refcount))
194 complete(&msrq->free);
195 }
196 } else {
197 wq = &qp->rq;
198 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
199 ++wq->tail;
200 }
201 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
202
203 switch (cqe->op_own >> 4) {
204 case MLX5_CQE_RESP_WR_IMM:
205 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
206 wc->wc_flags = IB_WC_WITH_IMM;
207 wc->ex.imm_data = cqe->imm_inval_pkey;
208 break;
209 case MLX5_CQE_RESP_SEND:
210 wc->opcode = IB_WC_RECV;
211 wc->wc_flags = 0;
212 break;
213 case MLX5_CQE_RESP_SEND_IMM:
214 wc->opcode = IB_WC_RECV;
215 wc->wc_flags = IB_WC_WITH_IMM;
216 wc->ex.imm_data = cqe->imm_inval_pkey;
217 break;
218 case MLX5_CQE_RESP_SEND_INV:
219 wc->opcode = IB_WC_RECV;
220 wc->wc_flags = IB_WC_WITH_INVALIDATE;
221 wc->ex.invalidate_rkey = be32_to_cpu(cqe->imm_inval_pkey);
222 break;
223 }
224 wc->slid = be16_to_cpu(cqe->slid);
225 wc->sl = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0xf;
226 wc->src_qp = be32_to_cpu(cqe->flags_rqpn) & 0xffffff;
227 wc->dlid_path_bits = cqe->ml_path;
228 g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3;
229 wc->wc_flags |= g ? IB_WC_GRH : 0;
230 wc->pkey_index = be32_to_cpu(cqe->imm_inval_pkey) & 0xffff;
231}
232
233static void dump_cqe(struct mlx5_ib_dev *dev, struct mlx5_err_cqe *cqe)
234{
235 __be32 *p = (__be32 *)cqe;
236 int i;
237
238 mlx5_ib_warn(dev, "dump error cqe\n");
239 for (i = 0; i < sizeof(*cqe) / 16; i++, p += 4)
240 pr_info("%08x %08x %08x %08x\n", be32_to_cpu(p[0]),
241 be32_to_cpu(p[1]), be32_to_cpu(p[2]),
242 be32_to_cpu(p[3]));
243}
244
245static void mlx5_handle_error_cqe(struct mlx5_ib_dev *dev,
246 struct mlx5_err_cqe *cqe,
247 struct ib_wc *wc)
248{
249 int dump = 1;
250
251 switch (cqe->syndrome) {
252 case MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR:
253 wc->status = IB_WC_LOC_LEN_ERR;
254 break;
255 case MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR:
256 wc->status = IB_WC_LOC_QP_OP_ERR;
257 break;
258 case MLX5_CQE_SYNDROME_LOCAL_PROT_ERR:
259 wc->status = IB_WC_LOC_PROT_ERR;
260 break;
261 case MLX5_CQE_SYNDROME_WR_FLUSH_ERR:
262 dump = 0;
263 wc->status = IB_WC_WR_FLUSH_ERR;
264 break;
265 case MLX5_CQE_SYNDROME_MW_BIND_ERR:
266 wc->status = IB_WC_MW_BIND_ERR;
267 break;
268 case MLX5_CQE_SYNDROME_BAD_RESP_ERR:
269 wc->status = IB_WC_BAD_RESP_ERR;
270 break;
271 case MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR:
272 wc->status = IB_WC_LOC_ACCESS_ERR;
273 break;
274 case MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR:
275 wc->status = IB_WC_REM_INV_REQ_ERR;
276 break;
277 case MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR:
278 wc->status = IB_WC_REM_ACCESS_ERR;
279 break;
280 case MLX5_CQE_SYNDROME_REMOTE_OP_ERR:
281 wc->status = IB_WC_REM_OP_ERR;
282 break;
283 case MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR:
284 wc->status = IB_WC_RETRY_EXC_ERR;
285 dump = 0;
286 break;
287 case MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR:
288 wc->status = IB_WC_RNR_RETRY_EXC_ERR;
289 dump = 0;
290 break;
291 case MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR:
292 wc->status = IB_WC_REM_ABORT_ERR;
293 break;
294 default:
295 wc->status = IB_WC_GENERAL_ERR;
296 break;
297 }
298
299 wc->vendor_err = cqe->vendor_err_synd;
300 if (dump)
301 dump_cqe(dev, cqe);
302}
303
304static int is_atomic_response(struct mlx5_ib_qp *qp, uint16_t idx)
305{
306 /* TBD: waiting decision
307 */
308 return 0;
309}
310
311static void *mlx5_get_atomic_laddr(struct mlx5_ib_qp *qp, uint16_t idx)
312{
313 struct mlx5_wqe_data_seg *dpseg;
314 void *addr;
315
316 dpseg = mlx5_get_send_wqe(qp, idx) + sizeof(struct mlx5_wqe_ctrl_seg) +
317 sizeof(struct mlx5_wqe_raddr_seg) +
318 sizeof(struct mlx5_wqe_atomic_seg);
319 addr = (void *)(unsigned long)be64_to_cpu(dpseg->addr);
320 return addr;
321}
322
323static void handle_atomic(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64,
324 uint16_t idx)
325{
326 void *addr;
327 int byte_count;
328 int i;
329
330 if (!is_atomic_response(qp, idx))
331 return;
332
333 byte_count = be32_to_cpu(cqe64->byte_cnt);
334 addr = mlx5_get_atomic_laddr(qp, idx);
335
336 if (byte_count == 4) {
337 *(uint32_t *)addr = be32_to_cpu(*((__be32 *)addr));
338 } else {
339 for (i = 0; i < byte_count; i += 8) {
340 *(uint64_t *)addr = be64_to_cpu(*((__be64 *)addr));
341 addr += 8;
342 }
343 }
344
345 return;
346}
347
348static void handle_atomics(struct mlx5_ib_qp *qp, struct mlx5_cqe64 *cqe64,
349 u16 tail, u16 head)
350{
f241e749 351 u16 idx;
e126ba97
EC		 352
353 do {
354 idx = tail & (qp->sq.wqe_cnt - 1);
355 handle_atomic(qp, cqe64, idx);
356 if (idx == head)
357 break;
358
359 tail = qp->sq.w_list[idx].next;
360 } while (1);
361 tail = qp->sq.w_list[idx].next;
362 qp->sq.last_poll = tail;
363}
364
bde51583
EC		 365static void free_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf)
366{
9603b61d 367 mlx5_buf_free(dev->mdev, &buf->buf);
bde51583
EC		 368}
369
d5436ba0
SG		 370static void get_sig_err_item(struct mlx5_sig_err_cqe *cqe,
371 struct ib_sig_err *item)
372{
373 u16 syndrome = be16_to_cpu(cqe->syndrome);
374
375#define GUARD_ERR (1 << 13)
376#define APPTAG_ERR (1 << 12)
377#define REFTAG_ERR (1 << 11)
378
379 if (syndrome & GUARD_ERR) {
380 item->err_type = IB_SIG_BAD_GUARD;
381 item->expected = be32_to_cpu(cqe->expected_trans_sig) >> 16;
382 item->actual = be32_to_cpu(cqe->actual_trans_sig) >> 16;
383 } else
384 if (syndrome & REFTAG_ERR) {
385 item->err_type = IB_SIG_BAD_REFTAG;
386 item->expected = be32_to_cpu(cqe->expected_reftag);
387 item->actual = be32_to_cpu(cqe->actual_reftag);
388 } else
389 if (syndrome & APPTAG_ERR) {
390 item->err_type = IB_SIG_BAD_APPTAG;
391 item->expected = be32_to_cpu(cqe->expected_trans_sig) & 0xffff;
392 item->actual = be32_to_cpu(cqe->actual_trans_sig) & 0xffff;
393 } else {
394 pr_err("Got signature completion error with bad syndrome %04x\n",
395 syndrome);
396 }
397
398 item->sig_err_offset = be64_to_cpu(cqe->err_offset);
399 item->key = be32_to_cpu(cqe->mkey);
400}
401
e126ba97
EC		 402static int mlx5_poll_one(struct mlx5_ib_cq *cq,
403 struct mlx5_ib_qp **cur_qp,
404 struct ib_wc *wc)
405{
406 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device);
407 struct mlx5_err_cqe *err_cqe;
408 struct mlx5_cqe64 *cqe64;
409 struct mlx5_core_qp *mqp;
410 struct mlx5_ib_wq *wq;
d5436ba0
SG		 411 struct mlx5_sig_err_cqe *sig_err_cqe;
412 struct mlx5_core_mr *mmr;
413 struct mlx5_ib_mr *mr;
e126ba97
EC		 414 uint8_t opcode;
415 uint32_t qpn;
416 u16 wqe_ctr;
417 void *cqe;
418 int idx;
419
bde51583 420repoll:
e126ba97
EC		 421 cqe = next_cqe_sw(cq);
422 if (!cqe)
423 return -EAGAIN;
424
425 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64;
426
427 ++cq->mcq.cons_index;
428
429 /* Make sure we read CQ entry contents after we've checked the
430 * ownership bit.
431 */
432 rmb();
433
bde51583
EC		 434 opcode = cqe64->op_own >> 4;
435 if (unlikely(opcode == MLX5_CQE_RESIZE_CQ)) {
436 if (likely(cq->resize_buf)) {
437 free_cq_buf(dev, &cq->buf);
438 cq->buf = *cq->resize_buf;
439 kfree(cq->resize_buf);
440 cq->resize_buf = NULL;
441 goto repoll;
442 } else {
443 mlx5_ib_warn(dev, "unexpected resize cqe\n");
444 }
445 }
e126ba97
EC		 446
447 qpn = ntohl(cqe64->sop_drop_qpn) & 0xffffff;
448 if (!*cur_qp || (qpn != (*cur_qp)->ibqp.qp_num)) {
449 /* We do not have to take the QP table lock here,
450 * because CQs will be locked while QPs are removed
451 * from the table.
452 */
9603b61d 453 mqp = __mlx5_qp_lookup(dev->mdev, qpn);
e126ba97
EC		 454 if (unlikely(!mqp)) {
455 mlx5_ib_warn(dev, "CQE@CQ %06x for unknown QPN %6x\n",
456 cq->mcq.cqn, qpn);
457 return -EINVAL;
458 }
459
460 *cur_qp = to_mibqp(mqp);
461 }
462
463 wc->qp = &(*cur_qp)->ibqp;
e126ba97
EC		 464 switch (opcode) {
465 case MLX5_CQE_REQ:
466 wq = &(*cur_qp)->sq;
467 wqe_ctr = be16_to_cpu(cqe64->wqe_counter);
468 idx = wqe_ctr & (wq->wqe_cnt - 1);
469 handle_good_req(wc, cqe64, wq, idx);
470 handle_atomics(*cur_qp, cqe64, wq->last_poll, idx);
471 wc->wr_id = wq->wrid[idx];
472 wq->tail = wq->wqe_head[idx] + 1;
473 wc->status = IB_WC_SUCCESS;
474 break;
475 case MLX5_CQE_RESP_WR_IMM:
476 case MLX5_CQE_RESP_SEND:
477 case MLX5_CQE_RESP_SEND_IMM:
478 case MLX5_CQE_RESP_SEND_INV:
479 handle_responder(wc, cqe64, *cur_qp);
480 wc->status = IB_WC_SUCCESS;
481 break;
482 case MLX5_CQE_RESIZE_CQ:
483 break;
484 case MLX5_CQE_REQ_ERR:
485 case MLX5_CQE_RESP_ERR:
486 err_cqe = (struct mlx5_err_cqe *)cqe64;
487 mlx5_handle_error_cqe(dev, err_cqe, wc);
488 mlx5_ib_dbg(dev, "%s error cqe on cqn 0x%x:\n",
489 opcode == MLX5_CQE_REQ_ERR ?
490 "Requestor" : "Responder", cq->mcq.cqn);
491 mlx5_ib_dbg(dev, "syndrome 0x%x, vendor syndrome 0x%x\n",
492 err_cqe->syndrome, err_cqe->vendor_err_synd);
493 if (opcode == MLX5_CQE_REQ_ERR) {
494 wq = &(*cur_qp)->sq;
495 wqe_ctr = be16_to_cpu(cqe64->wqe_counter);
496 idx = wqe_ctr & (wq->wqe_cnt - 1);
497 wc->wr_id = wq->wrid[idx];
498 wq->tail = wq->wqe_head[idx] + 1;
499 } else {
500 struct mlx5_ib_srq *srq;
501
502 if ((*cur_qp)->ibqp.srq) {
503 srq = to_msrq((*cur_qp)->ibqp.srq);
504 wqe_ctr = be16_to_cpu(cqe64->wqe_counter);
505 wc->wr_id = srq->wrid[wqe_ctr];
506 mlx5_ib_free_srq_wqe(srq, wqe_ctr);
507 } else {
508 wq = &(*cur_qp)->rq;
509 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
510 ++wq->tail;
511 }
512 }
513 break;
d5436ba0
SG		 514 case MLX5_CQE_SIG_ERR:
515 sig_err_cqe = (struct mlx5_sig_err_cqe *)cqe64;
516
9603b61d
JM		 517 read_lock(&dev->mdev->priv.mr_table.lock);
518 mmr = __mlx5_mr_lookup(dev->mdev,
d5436ba0
SG		 519 mlx5_base_mkey(be32_to_cpu(sig_err_cqe->mkey)));
520 if (unlikely(!mmr)) {
9603b61d 521 read_unlock(&dev->mdev->priv.mr_table.lock);
d5436ba0
SG		 522 mlx5_ib_warn(dev, "CQE@CQ %06x for unknown MR %6x\n",
523 cq->mcq.cqn, be32_to_cpu(sig_err_cqe->mkey));
524 return -EINVAL;
525 }
526
527 mr = to_mibmr(mmr);
528 get_sig_err_item(sig_err_cqe, &mr->sig->err_item);
529 mr->sig->sig_err_exists = true;
530 mr->sig->sigerr_count++;
531
532 mlx5_ib_warn(dev, "CQN: 0x%x Got SIGERR on key: 0x%x err_type %x err_offset %llx expected %x actual %x\n",
533 cq->mcq.cqn, mr->sig->err_item.key,
534 mr->sig->err_item.err_type,
535 mr->sig->err_item.sig_err_offset,
536 mr->sig->err_item.expected,
537 mr->sig->err_item.actual);
538
9603b61d 539 read_unlock(&dev->mdev->priv.mr_table.lock);
d5436ba0 540 goto repoll;
e126ba97
EC		 541 }
542
543 return 0;
544}
545
546int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
547{
548 struct mlx5_ib_cq *cq = to_mcq(ibcq);
549 struct mlx5_ib_qp *cur_qp = NULL;
550 unsigned long flags;
551 int npolled;
552 int err = 0;
553
554 spin_lock_irqsave(&cq->lock, flags);
555
556 for (npolled = 0; npolled < num_entries; npolled++) {
557 err = mlx5_poll_one(cq, &cur_qp, wc + npolled);
558 if (err)
559 break;
560 }
561
562 if (npolled)
563 mlx5_cq_set_ci(&cq->mcq);
564
565 spin_unlock_irqrestore(&cq->lock, flags);
566
567 if (err == 0 || err == -EAGAIN)
568 return npolled;
569 else
570 return err;
571}
572
573int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
574{
575 mlx5_cq_arm(&to_mcq(ibcq)->mcq,
576 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
577 MLX5_CQ_DB_REQ_NOT_SOL : MLX5_CQ_DB_REQ_NOT,
9603b61d
JM		 578 to_mdev(ibcq->device)->mdev->priv.uuari.uars[0].map,
579 MLX5_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->mdev->priv.cq_uar_lock));
e126ba97
EC		 580
581 return 0;
582}
583
584static int alloc_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf,
585 int nent, int cqe_size)
586{
587 int err;
588
9603b61d 589 err = mlx5_buf_alloc(dev->mdev, nent * cqe_size,
e126ba97
EC		 590 PAGE_SIZE * 2, &buf->buf);
591 if (err)
592 return err;
593
594 buf->cqe_size = cqe_size;
bde51583 595 buf->nent = nent;
e126ba97
EC		 596
597 return 0;
598}
599
e126ba97
EC		 600static int create_cq_user(struct mlx5_ib_dev *dev, struct ib_udata *udata,
601 struct ib_ucontext *context, struct mlx5_ib_cq *cq,
602 int entries, struct mlx5_create_cq_mbox_in **cqb,
603 int *cqe_size, int *index, int *inlen)
604{
605 struct mlx5_ib_create_cq ucmd;
a8237b32 606 size_t ucmdlen;
e126ba97
EC		 607 int page_shift;
608 int npages;
609 int ncont;
610 int err;
611
a8237b32
YD		 612 ucmdlen =
613 (udata->inlen - sizeof(struct ib_uverbs_cmd_hdr) <
614 sizeof(ucmd)) ? (sizeof(ucmd) -
615 sizeof(ucmd.reserved)) : sizeof(ucmd);
616
617 if (ib_copy_from_udata(&ucmd, udata, ucmdlen))
e126ba97
EC		 618 return -EFAULT;
619
a8237b32
YD		 620 if (ucmdlen == sizeof(ucmd) &&
621 ucmd.reserved != 0)
622 return -EINVAL;
623
e126ba97
EC		 624 if (ucmd.cqe_size != 64 && ucmd.cqe_size != 128)
625 return -EINVAL;
626
627 *cqe_size = ucmd.cqe_size;
628
629 cq->buf.umem = ib_umem_get(context, ucmd.buf_addr,
630 entries * ucmd.cqe_size,
631 IB_ACCESS_LOCAL_WRITE, 1);
632 if (IS_ERR(cq->buf.umem)) {
633 err = PTR_ERR(cq->buf.umem);
634 return err;
635 }
636
637 err = mlx5_ib_db_map_user(to_mucontext(context), ucmd.db_addr,
638 &cq->db);
639 if (err)
640 goto err_umem;
641
642 mlx5_ib_cont_pages(cq->buf.umem, ucmd.buf_addr, &npages, &page_shift,
643 &ncont, NULL);
644 mlx5_ib_dbg(dev, "addr 0x%llx, size %u, npages %d, page_shift %d, ncont %d\n",
645 ucmd.buf_addr, entries * ucmd.cqe_size, npages, page_shift, ncont);
646
647 *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * ncont;
648 *cqb = mlx5_vzalloc(*inlen);
649 if (!*cqb) {
650 err = -ENOMEM;
651 goto err_db;
652 }
653 mlx5_ib_populate_pas(dev, cq->buf.umem, page_shift, (*cqb)->pas, 0);
cf1c5e1f 654 (*cqb)->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT;
e126ba97
EC		 655
656 *index = to_mucontext(context)->uuari.uars[0].index;
657
658 return 0;
659
660err_db:
661 mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db);
662
663err_umem:
664 ib_umem_release(cq->buf.umem);
665 return err;
666}
667
668static void destroy_cq_user(struct mlx5_ib_cq *cq, struct ib_ucontext *context)
669{
670 mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db);
671 ib_umem_release(cq->buf.umem);
672}
673
bde51583 674static void init_cq_buf(struct mlx5_ib_cq *cq, struct mlx5_ib_cq_buf *buf)
e126ba97
EC		 675{
676 int i;
677 void *cqe;
678 struct mlx5_cqe64 *cqe64;
679
bde51583
EC		 680 for (i = 0; i < buf->nent; i++) {
681 cqe = get_cqe_from_buf(buf, i, buf->cqe_size);
682 cqe64 = buf->cqe_size == 64 ? cqe : cqe + 64;
683 cqe64->op_own = MLX5_CQE_INVALID << 4;
e126ba97
EC		 684 }
685}
686
687static int create_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq,
688 int entries, int cqe_size,
689 struct mlx5_create_cq_mbox_in **cqb,
690 int *index, int *inlen)
691{
692 int err;
693
9603b61d 694 err = mlx5_db_alloc(dev->mdev, &cq->db);
e126ba97
EC		 695 if (err)
696 return err;
697
698 cq->mcq.set_ci_db = cq->db.db;
699 cq->mcq.arm_db = cq->db.db + 1;
e126ba97
EC		 700 cq->mcq.cqe_sz = cqe_size;
701
702 err = alloc_cq_buf(dev, &cq->buf, entries, cqe_size);
703 if (err)
704 goto err_db;
705
bde51583 706 init_cq_buf(cq, &cq->buf);
e126ba97
EC		 707
708 *inlen = sizeof(**cqb) + sizeof(*(*cqb)->pas) * cq->buf.buf.npages;
709 *cqb = mlx5_vzalloc(*inlen);
710 if (!*cqb) {
711 err = -ENOMEM;
712 goto err_buf;
713 }
714 mlx5_fill_page_array(&cq->buf.buf, (*cqb)->pas);
715
1b77d2bd 716 (*cqb)->ctx.log_pg_sz = cq->buf.buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT;
9603b61d 717 *index = dev->mdev->priv.uuari.uars[0].index;
e126ba97
EC		 718
719 return 0;
720
721err_buf:
722 free_cq_buf(dev, &cq->buf);
723
724err_db:
9603b61d 725 mlx5_db_free(dev->mdev, &cq->db);
e126ba97
EC		 726 return err;
727}
728
729static void destroy_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq)
730{
731 free_cq_buf(dev, &cq->buf);
9603b61d 732 mlx5_db_free(dev->mdev, &cq->db);
e126ba97
EC		 733}
734
735struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev, int entries,
736 int vector, struct ib_ucontext *context,
737 struct ib_udata *udata)
738{
739 struct mlx5_create_cq_mbox_in *cqb = NULL;
740 struct mlx5_ib_dev *dev = to_mdev(ibdev);
741 struct mlx5_ib_cq *cq;
742 int uninitialized_var(index);
743 int uninitialized_var(inlen);
744 int cqe_size;
745 int irqn;
746 int eqn;
747 int err;
748
51ee86a4
EC		 749 if (entries < 0)
750 return ERR_PTR(-EINVAL);
751
e126ba97 752 entries = roundup_pow_of_two(entries + 1);
c7a08ac7 753 if (entries > dev->mdev->caps.gen.max_cqes)
e126ba97
EC		 754 return ERR_PTR(-EINVAL);
755
756 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
757 if (!cq)
758 return ERR_PTR(-ENOMEM);
759
760 cq->ibcq.cqe = entries - 1;
761 mutex_init(&cq->resize_mutex);
762 spin_lock_init(&cq->lock);
763 cq->resize_buf = NULL;
764 cq->resize_umem = NULL;
765
766 if (context) {
767 err = create_cq_user(dev, udata, context, cq, entries,
768 &cqb, &cqe_size, &index, &inlen);
769 if (err)
770 goto err_create;
771 } else {
772 /* for now choose 64 bytes till we have a proper interface */
773 cqe_size = 64;
774 err = create_cq_kernel(dev, cq, entries, cqe_size, &cqb,
775 &index, &inlen);
776 if (err)
777 goto err_create;
778 }
779
780 cq->cqe_size = cqe_size;
781 cqb->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5;
782 cqb->ctx.log_sz_usr_page = cpu_to_be32((ilog2(entries) << 24) | index);
233d05d2 783 err = mlx5_vector2eqn(dev->mdev, vector, &eqn, &irqn);
e126ba97
EC		 784 if (err)
785 goto err_cqb;
786
787 cqb->ctx.c_eqn = cpu_to_be16(eqn);
788 cqb->ctx.db_record_addr = cpu_to_be64(cq->db.dma);
789
9603b61d 790 err = mlx5_core_create_cq(dev->mdev, &cq->mcq, cqb, inlen);
e126ba97
EC		 791 if (err)
792 goto err_cqb;
793
794 mlx5_ib_dbg(dev, "cqn 0x%x\n", cq->mcq.cqn);
795 cq->mcq.irqn = irqn;
796 cq->mcq.comp = mlx5_ib_cq_comp;
797 cq->mcq.event = mlx5_ib_cq_event;
798
799 if (context)
800 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof(__u32))) {
801 err = -EFAULT;
802 goto err_cmd;
803 }
804
805
479163f4 806 kvfree(cqb);
e126ba97
EC		 807 return &cq->ibcq;
808
809err_cmd:
9603b61d 810 mlx5_core_destroy_cq(dev->mdev, &cq->mcq);
e126ba97
EC		 811
812err_cqb:
479163f4 813 kvfree(cqb);
e126ba97
EC		 814 if (context)
815 destroy_cq_user(cq, context);
816 else
817 destroy_cq_kernel(dev, cq);
818
819err_create:
820 kfree(cq);
821
822 return ERR_PTR(err);
823}
824
825
826int mlx5_ib_destroy_cq(struct ib_cq *cq)
827{
828 struct mlx5_ib_dev *dev = to_mdev(cq->device);
829 struct mlx5_ib_cq *mcq = to_mcq(cq);
830 struct ib_ucontext *context = NULL;
831
832 if (cq->uobject)
833 context = cq->uobject->context;
834
9603b61d 835 mlx5_core_destroy_cq(dev->mdev, &mcq->mcq);
e126ba97
EC		 836 if (context)
837 destroy_cq_user(mcq, context);
838 else
839 destroy_cq_kernel(dev, mcq);
840
841 kfree(mcq);
842
843 return 0;
844}
845
cfd8f1d4 846static int is_equal_rsn(struct mlx5_cqe64 *cqe64, u32 rsn)
e126ba97 847{
cfd8f1d4 848 return rsn == (ntohl(cqe64->sop_drop_qpn) & 0xffffff);
e126ba97
EC		 849}
850
851void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 rsn, struct mlx5_ib_srq *srq)
852{
853 struct mlx5_cqe64 *cqe64, *dest64;
854 void *cqe, *dest;
855 u32 prod_index;
856 int nfreed = 0;
857 u8 owner_bit;
858
859 if (!cq)
860 return;
861
862 /* First we need to find the current producer index, so we
863 * know where to start cleaning from. It doesn't matter if HW
864 * adds new entries after this loop -- the QP we're worried
865 * about is already in RESET, so the new entries won't come
866 * from our QP and therefore don't need to be checked.
867 */
868 for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); prod_index++)
869 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe)
870 break;
871
872 /* Now sweep backwards through the CQ, removing CQ entries
873 * that match our QP by copying older entries on top of them.
874 */
875 while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) {
876 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe);
877 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64;
cfd8f1d4
ML		 878 if (is_equal_rsn(cqe64, rsn)) {
879 if (srq && (ntohl(cqe64->srqn) & 0xffffff))
e126ba97
EC		 880 mlx5_ib_free_srq_wqe(srq, be16_to_cpu(cqe64->wqe_counter));
881 ++nfreed;
882 } else if (nfreed) {
883 dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe);
884 dest64 = (cq->mcq.cqe_sz == 64) ? dest : dest + 64;
885 owner_bit = dest64->op_own & MLX5_CQE_OWNER_MASK;
886 memcpy(dest, cqe, cq->mcq.cqe_sz);
887 dest64->op_own = owner_bit |
888 (dest64->op_own & ~MLX5_CQE_OWNER_MASK);
889 }
890 }
891
892 if (nfreed) {
893 cq->mcq.cons_index += nfreed;
894 /* Make sure update of buffer contents is done before
895 * updating consumer index.
896 */
897 wmb();
898 mlx5_cq_set_ci(&cq->mcq);
899 }
900}
901
902void mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 qpn, struct mlx5_ib_srq *srq)
903{
904 if (!cq)
905 return;
906
907 spin_lock_irq(&cq->lock);
908 __mlx5_ib_cq_clean(cq, qpn, srq);
909 spin_unlock_irq(&cq->lock);
910}
911
912int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
913{
3bdb31f6
EC		 914 struct mlx5_modify_cq_mbox_in *in;
915 struct mlx5_ib_dev *dev = to_mdev(cq->device);
916 struct mlx5_ib_cq *mcq = to_mcq(cq);
917 int err;
918 u32 fsel;
919
c7a08ac7 920 if (!(dev->mdev->caps.gen.flags & MLX5_DEV_CAP_FLAG_CQ_MODER))
3bdb31f6
EC		 921 return -ENOSYS;
922
923 in = kzalloc(sizeof(*in), GFP_KERNEL);
924 if (!in)
925 return -ENOMEM;
926
927 in->cqn = cpu_to_be32(mcq->mcq.cqn);
928 fsel = (MLX5_CQ_MODIFY_PERIOD | MLX5_CQ_MODIFY_COUNT);
929 in->ctx.cq_period = cpu_to_be16(cq_period);
930 in->ctx.cq_max_count = cpu_to_be16(cq_count);
931 in->field_select = cpu_to_be32(fsel);
9603b61d 932 err = mlx5_core_modify_cq(dev->mdev, &mcq->mcq, in, sizeof(*in));
3bdb31f6
EC		 933 kfree(in);
934
935 if (err)
936 mlx5_ib_warn(dev, "modify cq 0x%x failed\n", mcq->mcq.cqn);
937
938 return err;
e126ba97
EC		 939}
940
bde51583
EC		 941static int resize_user(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq,
942 int entries, struct ib_udata *udata, int *npas,
943 int *page_shift, int *cqe_size)
944{
945 struct mlx5_ib_resize_cq ucmd;
946 struct ib_umem *umem;
947 int err;
948 int npages;
949 struct ib_ucontext *context = cq->buf.umem->context;
950
57761d8d
EC		 951 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
952 if (err)
953 return err;
954
955 if (ucmd.reserved0 || ucmd.reserved1)
956 return -EINVAL;
bde51583
EC		 957
958 umem = ib_umem_get(context, ucmd.buf_addr, entries * ucmd.cqe_size,
959 IB_ACCESS_LOCAL_WRITE, 1);
960 if (IS_ERR(umem)) {
961 err = PTR_ERR(umem);
962 return err;
963 }
964
965 mlx5_ib_cont_pages(umem, ucmd.buf_addr, &npages, page_shift,
966 npas, NULL);
967
968 cq->resize_umem = umem;
969 *cqe_size = ucmd.cqe_size;
970
971 return 0;
972}
973
974static void un_resize_user(struct mlx5_ib_cq *cq)
975{
976 ib_umem_release(cq->resize_umem);
977}
978
979static int resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq,
980 int entries, int cqe_size)
981{
982 int err;
983
984 cq->resize_buf = kzalloc(sizeof(*cq->resize_buf), GFP_KERNEL);
985 if (!cq->resize_buf)
986 return -ENOMEM;
987
988 err = alloc_cq_buf(dev, cq->resize_buf, entries, cqe_size);
989 if (err)
990 goto ex;
991
992 init_cq_buf(cq, cq->resize_buf);
993
994 return 0;
995
996ex:
997 kfree(cq->resize_buf);
998 return err;
999}
1000
1001static void un_resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq)
1002{
1003 free_cq_buf(dev, cq->resize_buf);
1004 cq->resize_buf = NULL;
1005}
1006
1007static int copy_resize_cqes(struct mlx5_ib_cq *cq)
1008{
1009 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device);
1010 struct mlx5_cqe64 *scqe64;
1011 struct mlx5_cqe64 *dcqe64;
1012 void *start_cqe;
1013 void *scqe;
1014 void *dcqe;
1015 int ssize;
1016 int dsize;
1017 int i;
1018 u8 sw_own;
1019
1020 ssize = cq->buf.cqe_size;
1021 dsize = cq->resize_buf->cqe_size;
1022 if (ssize != dsize) {
1023 mlx5_ib_warn(dev, "resize from different cqe size is not supported\n");
1024 return -EINVAL;
1025 }
1026
1027 i = cq->mcq.cons_index;
1028 scqe = get_sw_cqe(cq, i);
1029 scqe64 = ssize == 64 ? scqe : scqe + 64;
1030 start_cqe = scqe;
1031 if (!scqe) {
1032 mlx5_ib_warn(dev, "expected cqe in sw ownership\n");
1033 return -EINVAL;
1034 }
1035
1036 while ((scqe64->op_own >> 4) != MLX5_CQE_RESIZE_CQ) {
1037 dcqe = get_cqe_from_buf(cq->resize_buf,
1038 (i + 1) & (cq->resize_buf->nent),
1039 dsize);
1040 dcqe64 = dsize == 64 ? dcqe : dcqe + 64;
1041 sw_own = sw_ownership_bit(i + 1, cq->resize_buf->nent);
1042 memcpy(dcqe, scqe, dsize);
1043 dcqe64->op_own = (dcqe64->op_own & ~MLX5_CQE_OWNER_MASK) | sw_own;
1044
1045 ++i;
1046 scqe = get_sw_cqe(cq, i);
1047 scqe64 = ssize == 64 ? scqe : scqe + 64;
1048 if (!scqe) {
1049 mlx5_ib_warn(dev, "expected cqe in sw ownership\n");
1050 return -EINVAL;
1051 }
1052
1053 if (scqe == start_cqe) {
1054 pr_warn("resize CQ failed to get resize CQE, CQN 0x%x\n",
1055 cq->mcq.cqn);
1056 return -ENOMEM;
1057 }
1058 }
1059 ++cq->mcq.cons_index;
1060 return 0;
1061}
1062
e126ba97
EC		 1063int mlx5_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
1064{
bde51583
EC		 1065 struct mlx5_ib_dev *dev = to_mdev(ibcq->device);
1066 struct mlx5_ib_cq *cq = to_mcq(ibcq);
1067 struct mlx5_modify_cq_mbox_in *in;
1068 int err;
1069 int npas;
1070 int page_shift;
1071 int inlen;
1072 int uninitialized_var(cqe_size);
1073 unsigned long flags;
1074
c7a08ac7 1075 if (!(dev->mdev->caps.gen.flags & MLX5_DEV_CAP_FLAG_RESIZE_CQ)) {
bde51583
EC		 1076 pr_info("Firmware does not support resize CQ\n");
1077 return -ENOSYS;
1078 }
1079
1080 if (entries < 1)
1081 return -EINVAL;
1082
1083 entries = roundup_pow_of_two(entries + 1);
c7a08ac7 1084 if (entries > dev->mdev->caps.gen.max_cqes + 1)
bde51583
EC		 1085 return -EINVAL;
1086
1087 if (entries == ibcq->cqe + 1)
1088 return 0;
1089
1090 mutex_lock(&cq->resize_mutex);
1091 if (udata) {
1092 err = resize_user(dev, cq, entries, udata, &npas, &page_shift,
1093 &cqe_size);
1094 } else {
1095 cqe_size = 64;
1096 err = resize_kernel(dev, cq, entries, cqe_size);
1097 if (!err) {
1098 npas = cq->resize_buf->buf.npages;
1099 page_shift = cq->resize_buf->buf.page_shift;
1100 }
1101 }
1102
1103 if (err)
1104 goto ex;
1105
1106 inlen = sizeof(*in) + npas * sizeof(in->pas[0]);
1107 in = mlx5_vzalloc(inlen);
1108 if (!in) {
1109 err = -ENOMEM;
1110 goto ex_resize;
1111 }
1112
1113 if (udata)
1114 mlx5_ib_populate_pas(dev, cq->resize_umem, page_shift,
1115 in->pas, 0);
1116 else
1117 mlx5_fill_page_array(&cq->resize_buf->buf, in->pas);
1118
1119 in->field_select = cpu_to_be32(MLX5_MODIFY_CQ_MASK_LOG_SIZE |
1120 MLX5_MODIFY_CQ_MASK_PG_OFFSET |
1121 MLX5_MODIFY_CQ_MASK_PG_SIZE);
1122 in->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT;
1123 in->ctx.cqe_sz_flags = cqe_sz_to_mlx_sz(cqe_size) << 5;
1124 in->ctx.page_offset = 0;
1125 in->ctx.log_sz_usr_page = cpu_to_be32(ilog2(entries) << 24);
1126 in->hdr.opmod = cpu_to_be16(MLX5_CQ_OPMOD_RESIZE);
1127 in->cqn = cpu_to_be32(cq->mcq.cqn);
1128
9603b61d 1129 err = mlx5_core_modify_cq(dev->mdev, &cq->mcq, in, inlen);
bde51583
EC		 1130 if (err)
1131 goto ex_alloc;
1132
1133 if (udata) {
1134 cq->ibcq.cqe = entries - 1;
1135 ib_umem_release(cq->buf.umem);
1136 cq->buf.umem = cq->resize_umem;
1137 cq->resize_umem = NULL;
1138 } else {
1139 struct mlx5_ib_cq_buf tbuf;
1140 int resized = 0;
1141
1142 spin_lock_irqsave(&cq->lock, flags);
1143 if (cq->resize_buf) {
1144 err = copy_resize_cqes(cq);
1145 if (!err) {
1146 tbuf = cq->buf;
1147 cq->buf = *cq->resize_buf;
1148 kfree(cq->resize_buf);
1149 cq->resize_buf = NULL;
1150 resized = 1;
1151 }
1152 }
1153 cq->ibcq.cqe = entries - 1;
1154 spin_unlock_irqrestore(&cq->lock, flags);
1155 if (resized)
1156 free_cq_buf(dev, &tbuf);
1157 }
1158 mutex_unlock(&cq->resize_mutex);
1159
479163f4 1160 kvfree(in);
bde51583
EC		 1161 return 0;
1162
1163ex_alloc:
479163f4 1164 kvfree(in);
bde51583
EC		 1165
1166ex_resize:
1167 if (udata)
1168 un_resize_user(cq);
1169 else
1170 un_resize_kernel(dev, cq);
1171ex:
1172 mutex_unlock(&cq->resize_mutex);
1173 return err;
e126ba97
EC		 1174}
1175
1176int mlx5_ib_get_cqe_size(struct mlx5_ib_dev *dev, struct ib_cq *ibcq)
1177{
1178 struct mlx5_ib_cq *cq;
1179
1180 if (!ibcq)
1181 return 128;
1182
1183 cq = to_mcq(ibcq);
1184 return cq->cqe_size;
1185}
Linux kernel - Deliverables
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