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Merge branches 'for-5.1/upstream-fixes', 'for-5.2/core', 'for-5.2/ish', 'for-5.2...
[mirror_ubuntu-kernels.git] / drivers / infiniband / hw / mlx5 / cq.c
1 /*
2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
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>
35 #include <rdma/ib_user_verbs.h>
36 #include <rdma/ib_cache.h>
37 #include "mlx5_ib.h"
38 #include "srq.h"
39
40 static void mlx5_ib_cq_comp(struct mlx5_core_cq *cq)
41 {
42 struct ib_cq *ibcq = &to_mibcq(cq)->ibcq;
43
44 ibcq->comp_handler(ibcq, ibcq->cq_context);
45 }
46
47 static void mlx5_ib_cq_event(struct mlx5_core_cq *mcq, enum mlx5_event type)
48 {
49 struct mlx5_ib_cq *cq = container_of(mcq, struct mlx5_ib_cq, mcq);
50 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device);
51 struct ib_cq *ibcq = &cq->ibcq;
52 struct ib_event event;
53
54 if (type != MLX5_EVENT_TYPE_CQ_ERROR) {
55 mlx5_ib_warn(dev, "Unexpected event type %d on CQ %06x\n",
56 type, mcq->cqn);
57 return;
58 }
59
60 if (ibcq->event_handler) {
61 event.device = &dev->ib_dev;
62 event.event = IB_EVENT_CQ_ERR;
63 event.element.cq = ibcq;
64 ibcq->event_handler(&event, ibcq->cq_context);
65 }
66 }
67
68 static void *get_cqe(struct mlx5_ib_cq *cq, int n)
69 {
70 return mlx5_frag_buf_get_wqe(&cq->buf.fbc, n);
71 }
72
73 static u8 sw_ownership_bit(int n, int nent)
74 {
75 return (n & nent) ? 1 : 0;
76 }
77
78 static void *get_sw_cqe(struct mlx5_ib_cq *cq, int n)
79 {
80 void *cqe = get_cqe(cq, n & cq->ibcq.cqe);
81 struct mlx5_cqe64 *cqe64;
82
83 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64;
84
85 if (likely(get_cqe_opcode(cqe64) != MLX5_CQE_INVALID) &&
86 !((cqe64->op_own & MLX5_CQE_OWNER_MASK) ^ !!(n & (cq->ibcq.cqe + 1)))) {
87 return cqe;
88 } else {
89 return NULL;
90 }
91 }
92
93 static void *next_cqe_sw(struct mlx5_ib_cq *cq)
94 {
95 return get_sw_cqe(cq, cq->mcq.cons_index);
96 }
97
98 static enum ib_wc_opcode get_umr_comp(struct mlx5_ib_wq *wq, int idx)
99 {
100 switch (wq->wr_data[idx]) {
101 case MLX5_IB_WR_UMR:
102 return 0;
103
104 case IB_WR_LOCAL_INV:
105 return IB_WC_LOCAL_INV;
106
107 case IB_WR_REG_MR:
108 return IB_WC_REG_MR;
109
110 default:
111 pr_warn("unknown completion status\n");
112 return 0;
113 }
114 }
115
116 static void handle_good_req(struct ib_wc *wc, struct mlx5_cqe64 *cqe,
117 struct mlx5_ib_wq *wq, int idx)
118 {
119 wc->wc_flags = 0;
120 switch (be32_to_cpu(cqe->sop_drop_qpn) >> 24) {
121 case MLX5_OPCODE_RDMA_WRITE_IMM:
122 wc->wc_flags |= IB_WC_WITH_IMM;
123 /* fall through */
124 case MLX5_OPCODE_RDMA_WRITE:
125 wc->opcode = IB_WC_RDMA_WRITE;
126 break;
127 case MLX5_OPCODE_SEND_IMM:
128 wc->wc_flags |= IB_WC_WITH_IMM;
129 /* fall through */
130 case MLX5_OPCODE_SEND:
131 case MLX5_OPCODE_SEND_INVAL:
132 wc->opcode = IB_WC_SEND;
133 break;
134 case MLX5_OPCODE_RDMA_READ:
135 wc->opcode = IB_WC_RDMA_READ;
136 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
137 break;
138 case MLX5_OPCODE_ATOMIC_CS:
139 wc->opcode = IB_WC_COMP_SWAP;
140 wc->byte_len = 8;
141 break;
142 case MLX5_OPCODE_ATOMIC_FA:
143 wc->opcode = IB_WC_FETCH_ADD;
144 wc->byte_len = 8;
145 break;
146 case MLX5_OPCODE_ATOMIC_MASKED_CS:
147 wc->opcode = IB_WC_MASKED_COMP_SWAP;
148 wc->byte_len = 8;
149 break;
150 case MLX5_OPCODE_ATOMIC_MASKED_FA:
151 wc->opcode = IB_WC_MASKED_FETCH_ADD;
152 wc->byte_len = 8;
153 break;
154 case MLX5_OPCODE_UMR:
155 wc->opcode = get_umr_comp(wq, idx);
156 break;
157 }
158 }
159
160 enum {
161 MLX5_GRH_IN_BUFFER = 1,
162 MLX5_GRH_IN_CQE = 2,
163 };
164
165 static void handle_responder(struct ib_wc *wc, struct mlx5_cqe64 *cqe,
166 struct mlx5_ib_qp *qp)
167 {
168 enum rdma_link_layer ll = rdma_port_get_link_layer(qp->ibqp.device, 1);
169 struct mlx5_ib_dev *dev = to_mdev(qp->ibqp.device);
170 struct mlx5_ib_srq *srq;
171 struct mlx5_ib_wq *wq;
172 u16 wqe_ctr;
173 u8 roce_packet_type;
174 bool vlan_present;
175 u8 g;
176
177 if (qp->ibqp.srq || qp->ibqp.xrcd) {
178 struct mlx5_core_srq *msrq = NULL;
179
180 if (qp->ibqp.xrcd) {
181 msrq = mlx5_cmd_get_srq(dev, be32_to_cpu(cqe->srqn));
182 srq = to_mibsrq(msrq);
183 } else {
184 srq = to_msrq(qp->ibqp.srq);
185 }
186 if (srq) {
187 wqe_ctr = be16_to_cpu(cqe->wqe_counter);
188 wc->wr_id = srq->wrid[wqe_ctr];
189 mlx5_ib_free_srq_wqe(srq, wqe_ctr);
190 if (msrq)
191 mlx5_core_res_put(&msrq->common);
192 }
193 } else {
194 wq = &qp->rq;
195 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
196 ++wq->tail;
197 }
198 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
199
200 switch (get_cqe_opcode(cqe)) {
201 case MLX5_CQE_RESP_WR_IMM:
202 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
203 wc->wc_flags = IB_WC_WITH_IMM;
204 wc->ex.imm_data = cqe->imm_inval_pkey;
205 break;
206 case MLX5_CQE_RESP_SEND:
207 wc->opcode = IB_WC_RECV;
208 wc->wc_flags = IB_WC_IP_CSUM_OK;
209 if (unlikely(!((cqe->hds_ip_ext & CQE_L3_OK) &&
210 (cqe->hds_ip_ext & CQE_L4_OK))))
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->src_qp = be32_to_cpu(cqe->flags_rqpn) & 0xffffff;
225 wc->dlid_path_bits = cqe->ml_path;
226 g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3;
227 wc->wc_flags |= g ? IB_WC_GRH : 0;
228 if (unlikely(is_qp1(qp->ibqp.qp_type))) {
229 u16 pkey = be32_to_cpu(cqe->imm_inval_pkey) & 0xffff;
230
231 ib_find_cached_pkey(&dev->ib_dev, qp->port, pkey,
232 &wc->pkey_index);
233 } else {
234 wc->pkey_index = 0;
235 }
236
237 if (ll != IB_LINK_LAYER_ETHERNET) {
238 wc->slid = be16_to_cpu(cqe->slid);
239 wc->sl = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0xf;
240 return;
241 }
242
243 wc->slid = 0;
244 vlan_present = cqe->l4_l3_hdr_type & 0x1;
245 roce_packet_type = (be32_to_cpu(cqe->flags_rqpn) >> 24) & 0x3;
246 if (vlan_present) {
247 wc->vlan_id = (be16_to_cpu(cqe->vlan_info)) & 0xfff;
248 wc->sl = (be16_to_cpu(cqe->vlan_info) >> 13) & 0x7;
249 wc->wc_flags |= IB_WC_WITH_VLAN;
250 } else {
251 wc->sl = 0;
252 }
253
254 switch (roce_packet_type) {
255 case MLX5_CQE_ROCE_L3_HEADER_TYPE_GRH:
256 wc->network_hdr_type = RDMA_NETWORK_IB;
257 break;
258 case MLX5_CQE_ROCE_L3_HEADER_TYPE_IPV6:
259 wc->network_hdr_type = RDMA_NETWORK_IPV6;
260 break;
261 case MLX5_CQE_ROCE_L3_HEADER_TYPE_IPV4:
262 wc->network_hdr_type = RDMA_NETWORK_IPV4;
263 break;
264 }
265 wc->wc_flags |= IB_WC_WITH_NETWORK_HDR_TYPE;
266 }
267
268 static void dump_cqe(struct mlx5_ib_dev *dev, struct mlx5_err_cqe *cqe)
269 {
270 mlx5_ib_warn(dev, "dump error cqe\n");
271 mlx5_dump_err_cqe(dev->mdev, cqe);
272 }
273
274 static void mlx5_handle_error_cqe(struct mlx5_ib_dev *dev,
275 struct mlx5_err_cqe *cqe,
276 struct ib_wc *wc)
277 {
278 int dump = 1;
279
280 switch (cqe->syndrome) {
281 case MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR:
282 wc->status = IB_WC_LOC_LEN_ERR;
283 break;
284 case MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR:
285 wc->status = IB_WC_LOC_QP_OP_ERR;
286 break;
287 case MLX5_CQE_SYNDROME_LOCAL_PROT_ERR:
288 wc->status = IB_WC_LOC_PROT_ERR;
289 break;
290 case MLX5_CQE_SYNDROME_WR_FLUSH_ERR:
291 dump = 0;
292 wc->status = IB_WC_WR_FLUSH_ERR;
293 break;
294 case MLX5_CQE_SYNDROME_MW_BIND_ERR:
295 wc->status = IB_WC_MW_BIND_ERR;
296 break;
297 case MLX5_CQE_SYNDROME_BAD_RESP_ERR:
298 wc->status = IB_WC_BAD_RESP_ERR;
299 break;
300 case MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR:
301 wc->status = IB_WC_LOC_ACCESS_ERR;
302 break;
303 case MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR:
304 wc->status = IB_WC_REM_INV_REQ_ERR;
305 break;
306 case MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR:
307 wc->status = IB_WC_REM_ACCESS_ERR;
308 break;
309 case MLX5_CQE_SYNDROME_REMOTE_OP_ERR:
310 wc->status = IB_WC_REM_OP_ERR;
311 break;
312 case MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR:
313 wc->status = IB_WC_RETRY_EXC_ERR;
314 dump = 0;
315 break;
316 case MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR:
317 wc->status = IB_WC_RNR_RETRY_EXC_ERR;
318 dump = 0;
319 break;
320 case MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR:
321 wc->status = IB_WC_REM_ABORT_ERR;
322 break;
323 default:
324 wc->status = IB_WC_GENERAL_ERR;
325 break;
326 }
327
328 wc->vendor_err = cqe->vendor_err_synd;
329 if (dump)
330 dump_cqe(dev, cqe);
331 }
332
333 static void free_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf)
334 {
335 mlx5_frag_buf_free(dev->mdev, &buf->frag_buf);
336 }
337
338 static void get_sig_err_item(struct mlx5_sig_err_cqe *cqe,
339 struct ib_sig_err *item)
340 {
341 u16 syndrome = be16_to_cpu(cqe->syndrome);
342
343 #define GUARD_ERR (1 << 13)
344 #define APPTAG_ERR (1 << 12)
345 #define REFTAG_ERR (1 << 11)
346
347 if (syndrome & GUARD_ERR) {
348 item->err_type = IB_SIG_BAD_GUARD;
349 item->expected = be32_to_cpu(cqe->expected_trans_sig) >> 16;
350 item->actual = be32_to_cpu(cqe->actual_trans_sig) >> 16;
351 } else
352 if (syndrome & REFTAG_ERR) {
353 item->err_type = IB_SIG_BAD_REFTAG;
354 item->expected = be32_to_cpu(cqe->expected_reftag);
355 item->actual = be32_to_cpu(cqe->actual_reftag);
356 } else
357 if (syndrome & APPTAG_ERR) {
358 item->err_type = IB_SIG_BAD_APPTAG;
359 item->expected = be32_to_cpu(cqe->expected_trans_sig) & 0xffff;
360 item->actual = be32_to_cpu(cqe->actual_trans_sig) & 0xffff;
361 } else {
362 pr_err("Got signature completion error with bad syndrome %04x\n",
363 syndrome);
364 }
365
366 item->sig_err_offset = be64_to_cpu(cqe->err_offset);
367 item->key = be32_to_cpu(cqe->mkey);
368 }
369
370 static void sw_comp(struct mlx5_ib_qp *qp, int num_entries, struct ib_wc *wc,
371 int *npolled, int is_send)
372 {
373 struct mlx5_ib_wq *wq;
374 unsigned int cur;
375 int np;
376 int i;
377
378 wq = (is_send) ? &qp->sq : &qp->rq;
379 cur = wq->head - wq->tail;
380 np = *npolled;
381
382 if (cur == 0)
383 return;
384
385 for (i = 0; i < cur && np < num_entries; i++) {
386 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
387 wc->status = IB_WC_WR_FLUSH_ERR;
388 wc->vendor_err = MLX5_CQE_SYNDROME_WR_FLUSH_ERR;
389 wq->tail++;
390 np++;
391 wc->qp = &qp->ibqp;
392 wc++;
393 }
394 *npolled = np;
395 }
396
397 static void mlx5_ib_poll_sw_comp(struct mlx5_ib_cq *cq, int num_entries,
398 struct ib_wc *wc, int *npolled)
399 {
400 struct mlx5_ib_qp *qp;
401
402 *npolled = 0;
403 /* Find uncompleted WQEs belonging to that cq and return mmics ones */
404 list_for_each_entry(qp, &cq->list_send_qp, cq_send_list) {
405 sw_comp(qp, num_entries, wc + *npolled, npolled, true);
406 if (*npolled >= num_entries)
407 return;
408 }
409
410 list_for_each_entry(qp, &cq->list_recv_qp, cq_recv_list) {
411 sw_comp(qp, num_entries, wc + *npolled, npolled, false);
412 if (*npolled >= num_entries)
413 return;
414 }
415 }
416
417 static int mlx5_poll_one(struct mlx5_ib_cq *cq,
418 struct mlx5_ib_qp **cur_qp,
419 struct ib_wc *wc)
420 {
421 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device);
422 struct mlx5_err_cqe *err_cqe;
423 struct mlx5_cqe64 *cqe64;
424 struct mlx5_core_qp *mqp;
425 struct mlx5_ib_wq *wq;
426 struct mlx5_sig_err_cqe *sig_err_cqe;
427 struct mlx5_core_mkey *mmkey;
428 struct mlx5_ib_mr *mr;
429 uint8_t opcode;
430 uint32_t qpn;
431 u16 wqe_ctr;
432 void *cqe;
433 int idx;
434
435 repoll:
436 cqe = next_cqe_sw(cq);
437 if (!cqe)
438 return -EAGAIN;
439
440 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64;
441
442 ++cq->mcq.cons_index;
443
444 /* Make sure we read CQ entry contents after we've checked the
445 * ownership bit.
446 */
447 rmb();
448
449 opcode = get_cqe_opcode(cqe64);
450 if (unlikely(opcode == MLX5_CQE_RESIZE_CQ)) {
451 if (likely(cq->resize_buf)) {
452 free_cq_buf(dev, &cq->buf);
453 cq->buf = *cq->resize_buf;
454 kfree(cq->resize_buf);
455 cq->resize_buf = NULL;
456 goto repoll;
457 } else {
458 mlx5_ib_warn(dev, "unexpected resize cqe\n");
459 }
460 }
461
462 qpn = ntohl(cqe64->sop_drop_qpn) & 0xffffff;
463 if (!*cur_qp || (qpn != (*cur_qp)->ibqp.qp_num)) {
464 /* We do not have to take the QP table lock here,
465 * because CQs will be locked while QPs are removed
466 * from the table.
467 */
468 mqp = __mlx5_qp_lookup(dev->mdev, qpn);
469 *cur_qp = to_mibqp(mqp);
470 }
471
472 wc->qp = &(*cur_qp)->ibqp;
473 switch (opcode) {
474 case MLX5_CQE_REQ:
475 wq = &(*cur_qp)->sq;
476 wqe_ctr = be16_to_cpu(cqe64->wqe_counter);
477 idx = wqe_ctr & (wq->wqe_cnt - 1);
478 handle_good_req(wc, cqe64, wq, idx);
479 wc->wr_id = wq->wrid[idx];
480 wq->tail = wq->wqe_head[idx] + 1;
481 wc->status = IB_WC_SUCCESS;
482 break;
483 case MLX5_CQE_RESP_WR_IMM:
484 case MLX5_CQE_RESP_SEND:
485 case MLX5_CQE_RESP_SEND_IMM:
486 case MLX5_CQE_RESP_SEND_INV:
487 handle_responder(wc, cqe64, *cur_qp);
488 wc->status = IB_WC_SUCCESS;
489 break;
490 case MLX5_CQE_RESIZE_CQ:
491 break;
492 case MLX5_CQE_REQ_ERR:
493 case MLX5_CQE_RESP_ERR:
494 err_cqe = (struct mlx5_err_cqe *)cqe64;
495 mlx5_handle_error_cqe(dev, err_cqe, wc);
496 mlx5_ib_dbg(dev, "%s error cqe on cqn 0x%x:\n",
497 opcode == MLX5_CQE_REQ_ERR ?
498 "Requestor" : "Responder", cq->mcq.cqn);
499 mlx5_ib_dbg(dev, "syndrome 0x%x, vendor syndrome 0x%x\n",
500 err_cqe->syndrome, err_cqe->vendor_err_synd);
501 if (opcode == MLX5_CQE_REQ_ERR) {
502 wq = &(*cur_qp)->sq;
503 wqe_ctr = be16_to_cpu(cqe64->wqe_counter);
504 idx = wqe_ctr & (wq->wqe_cnt - 1);
505 wc->wr_id = wq->wrid[idx];
506 wq->tail = wq->wqe_head[idx] + 1;
507 } else {
508 struct mlx5_ib_srq *srq;
509
510 if ((*cur_qp)->ibqp.srq) {
511 srq = to_msrq((*cur_qp)->ibqp.srq);
512 wqe_ctr = be16_to_cpu(cqe64->wqe_counter);
513 wc->wr_id = srq->wrid[wqe_ctr];
514 mlx5_ib_free_srq_wqe(srq, wqe_ctr);
515 } else {
516 wq = &(*cur_qp)->rq;
517 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
518 ++wq->tail;
519 }
520 }
521 break;
522 case MLX5_CQE_SIG_ERR:
523 sig_err_cqe = (struct mlx5_sig_err_cqe *)cqe64;
524
525 read_lock(&dev->mdev->priv.mkey_table.lock);
526 mmkey = __mlx5_mr_lookup(dev->mdev,
527 mlx5_base_mkey(be32_to_cpu(sig_err_cqe->mkey)));
528 mr = to_mibmr(mmkey);
529 get_sig_err_item(sig_err_cqe, &mr->sig->err_item);
530 mr->sig->sig_err_exists = true;
531 mr->sig->sigerr_count++;
532
533 mlx5_ib_warn(dev, "CQN: 0x%x Got SIGERR on key: 0x%x err_type %x err_offset %llx expected %x actual %x\n",
534 cq->mcq.cqn, mr->sig->err_item.key,
535 mr->sig->err_item.err_type,
536 mr->sig->err_item.sig_err_offset,
537 mr->sig->err_item.expected,
538 mr->sig->err_item.actual);
539
540 read_unlock(&dev->mdev->priv.mkey_table.lock);
541 goto repoll;
542 }
543
544 return 0;
545 }
546
547 static int poll_soft_wc(struct mlx5_ib_cq *cq, int num_entries,
548 struct ib_wc *wc, bool is_fatal_err)
549 {
550 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device);
551 struct mlx5_ib_wc *soft_wc, *next;
552 int npolled = 0;
553
554 list_for_each_entry_safe(soft_wc, next, &cq->wc_list, list) {
555 if (npolled >= num_entries)
556 break;
557
558 mlx5_ib_dbg(dev, "polled software generated completion on CQ 0x%x\n",
559 cq->mcq.cqn);
560
561 if (unlikely(is_fatal_err)) {
562 soft_wc->wc.status = IB_WC_WR_FLUSH_ERR;
563 soft_wc->wc.vendor_err = MLX5_CQE_SYNDROME_WR_FLUSH_ERR;
564 }
565 wc[npolled++] = soft_wc->wc;
566 list_del(&soft_wc->list);
567 kfree(soft_wc);
568 }
569
570 return npolled;
571 }
572
573 int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
574 {
575 struct mlx5_ib_cq *cq = to_mcq(ibcq);
576 struct mlx5_ib_qp *cur_qp = NULL;
577 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device);
578 struct mlx5_core_dev *mdev = dev->mdev;
579 unsigned long flags;
580 int soft_polled = 0;
581 int npolled;
582
583 spin_lock_irqsave(&cq->lock, flags);
584 if (mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {
585 /* make sure no soft wqe's are waiting */
586 if (unlikely(!list_empty(&cq->wc_list)))
587 soft_polled = poll_soft_wc(cq, num_entries, wc, true);
588
589 mlx5_ib_poll_sw_comp(cq, num_entries - soft_polled,
590 wc + soft_polled, &npolled);
591 goto out;
592 }
593
594 if (unlikely(!list_empty(&cq->wc_list)))
595 soft_polled = poll_soft_wc(cq, num_entries, wc, false);
596
597 for (npolled = 0; npolled < num_entries - soft_polled; npolled++) {
598 if (mlx5_poll_one(cq, &cur_qp, wc + soft_polled + npolled))
599 break;
600 }
601
602 if (npolled)
603 mlx5_cq_set_ci(&cq->mcq);
604 out:
605 spin_unlock_irqrestore(&cq->lock, flags);
606
607 return soft_polled + npolled;
608 }
609
610 int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
611 {
612 struct mlx5_core_dev *mdev = to_mdev(ibcq->device)->mdev;
613 struct mlx5_ib_cq *cq = to_mcq(ibcq);
614 void __iomem *uar_page = mdev->priv.uar->map;
615 unsigned long irq_flags;
616 int ret = 0;
617
618 spin_lock_irqsave(&cq->lock, irq_flags);
619 if (cq->notify_flags != IB_CQ_NEXT_COMP)
620 cq->notify_flags = flags & IB_CQ_SOLICITED_MASK;
621
622 if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !list_empty(&cq->wc_list))
623 ret = 1;
624 spin_unlock_irqrestore(&cq->lock, irq_flags);
625
626 mlx5_cq_arm(&cq->mcq,
627 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
628 MLX5_CQ_DB_REQ_NOT_SOL : MLX5_CQ_DB_REQ_NOT,
629 uar_page, to_mcq(ibcq)->mcq.cons_index);
630
631 return ret;
632 }
633
634 static int alloc_cq_frag_buf(struct mlx5_ib_dev *dev,
635 struct mlx5_ib_cq_buf *buf,
636 int nent,
637 int cqe_size)
638 {
639 struct mlx5_frag_buf *frag_buf = &buf->frag_buf;
640 u8 log_wq_stride = 6 + (cqe_size == 128 ? 1 : 0);
641 u8 log_wq_sz = ilog2(cqe_size);
642 int err;
643
644 err = mlx5_frag_buf_alloc_node(dev->mdev,
645 nent * cqe_size,
646 frag_buf,
647 dev->mdev->priv.numa_node);
648 if (err)
649 return err;
650
651 mlx5_init_fbc(frag_buf->frags, log_wq_stride, log_wq_sz, &buf->fbc);
652
653 buf->cqe_size = cqe_size;
654 buf->nent = nent;
655
656 return 0;
657 }
658
659 enum {
660 MLX5_CQE_RES_FORMAT_HASH = 0,
661 MLX5_CQE_RES_FORMAT_CSUM = 1,
662 MLX5_CQE_RES_FORMAT_CSUM_STRIDX = 3,
663 };
664
665 static int mini_cqe_res_format_to_hw(struct mlx5_ib_dev *dev, u8 format)
666 {
667 switch (format) {
668 case MLX5_IB_CQE_RES_FORMAT_HASH:
669 return MLX5_CQE_RES_FORMAT_HASH;
670 case MLX5_IB_CQE_RES_FORMAT_CSUM:
671 return MLX5_CQE_RES_FORMAT_CSUM;
672 case MLX5_IB_CQE_RES_FORMAT_CSUM_STRIDX:
673 if (MLX5_CAP_GEN(dev->mdev, mini_cqe_resp_stride_index))
674 return MLX5_CQE_RES_FORMAT_CSUM_STRIDX;
675 return -EOPNOTSUPP;
676 default:
677 return -EINVAL;
678 }
679 }
680
681 static int create_cq_user(struct mlx5_ib_dev *dev, struct ib_udata *udata,
682 struct ib_ucontext *context, struct mlx5_ib_cq *cq,
683 int entries, u32 **cqb,
684 int *cqe_size, int *index, int *inlen)
685 {
686 struct mlx5_ib_create_cq ucmd = {};
687 size_t ucmdlen;
688 int page_shift;
689 __be64 *pas;
690 int npages;
691 int ncont;
692 void *cqc;
693 int err;
694
695 ucmdlen = udata->inlen < sizeof(ucmd) ?
696 (sizeof(ucmd) - sizeof(ucmd.flags)) : sizeof(ucmd);
697
698 if (ib_copy_from_udata(&ucmd, udata, ucmdlen))
699 return -EFAULT;
700
701 if (ucmdlen == sizeof(ucmd) &&
702 (ucmd.flags & ~(MLX5_IB_CREATE_CQ_FLAGS_CQE_128B_PAD)))
703 return -EINVAL;
704
705 if (ucmd.cqe_size != 64 && ucmd.cqe_size != 128)
706 return -EINVAL;
707
708 *cqe_size = ucmd.cqe_size;
709
710 cq->buf.umem =
711 ib_umem_get(udata, ucmd.buf_addr, entries * ucmd.cqe_size,
712 IB_ACCESS_LOCAL_WRITE, 1);
713 if (IS_ERR(cq->buf.umem)) {
714 err = PTR_ERR(cq->buf.umem);
715 return err;
716 }
717
718 err = mlx5_ib_db_map_user(to_mucontext(context), udata, ucmd.db_addr,
719 &cq->db);
720 if (err)
721 goto err_umem;
722
723 mlx5_ib_cont_pages(cq->buf.umem, ucmd.buf_addr, 0, &npages, &page_shift,
724 &ncont, NULL);
725 mlx5_ib_dbg(dev, "addr 0x%llx, size %u, npages %d, page_shift %d, ncont %d\n",
726 ucmd.buf_addr, entries * ucmd.cqe_size, npages, page_shift, ncont);
727
728 *inlen = MLX5_ST_SZ_BYTES(create_cq_in) +
729 MLX5_FLD_SZ_BYTES(create_cq_in, pas[0]) * ncont;
730 *cqb = kvzalloc(*inlen, GFP_KERNEL);
731 if (!*cqb) {
732 err = -ENOMEM;
733 goto err_db;
734 }
735
736 pas = (__be64 *)MLX5_ADDR_OF(create_cq_in, *cqb, pas);
737 mlx5_ib_populate_pas(dev, cq->buf.umem, page_shift, pas, 0);
738
739 cqc = MLX5_ADDR_OF(create_cq_in, *cqb, cq_context);
740 MLX5_SET(cqc, cqc, log_page_size,
741 page_shift - MLX5_ADAPTER_PAGE_SHIFT);
742
743 *index = to_mucontext(context)->bfregi.sys_pages[0];
744
745 if (ucmd.cqe_comp_en == 1) {
746 int mini_cqe_format;
747
748 if (!((*cqe_size == 128 &&
749 MLX5_CAP_GEN(dev->mdev, cqe_compression_128)) ||
750 (*cqe_size == 64 &&
751 MLX5_CAP_GEN(dev->mdev, cqe_compression)))) {
752 err = -EOPNOTSUPP;
753 mlx5_ib_warn(dev, "CQE compression is not supported for size %d!\n",
754 *cqe_size);
755 goto err_cqb;
756 }
757
758 mini_cqe_format =
759 mini_cqe_res_format_to_hw(dev,
760 ucmd.cqe_comp_res_format);
761 if (mini_cqe_format < 0) {
762 err = mini_cqe_format;
763 mlx5_ib_dbg(dev, "CQE compression res format %d error: %d\n",
764 ucmd.cqe_comp_res_format, err);
765 goto err_cqb;
766 }
767
768 MLX5_SET(cqc, cqc, cqe_comp_en, 1);
769 MLX5_SET(cqc, cqc, mini_cqe_res_format, mini_cqe_format);
770 }
771
772 if (ucmd.flags & MLX5_IB_CREATE_CQ_FLAGS_CQE_128B_PAD) {
773 if (*cqe_size != 128 ||
774 !MLX5_CAP_GEN(dev->mdev, cqe_128_always)) {
775 err = -EOPNOTSUPP;
776 mlx5_ib_warn(dev,
777 "CQE padding is not supported for CQE size of %dB!\n",
778 *cqe_size);
779 goto err_cqb;
780 }
781
782 cq->private_flags |= MLX5_IB_CQ_PR_FLAGS_CQE_128_PAD;
783 }
784
785 MLX5_SET(create_cq_in, *cqb, uid, to_mucontext(context)->devx_uid);
786 return 0;
787
788 err_cqb:
789 kvfree(*cqb);
790
791 err_db:
792 mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db);
793
794 err_umem:
795 ib_umem_release(cq->buf.umem);
796 return err;
797 }
798
799 static void destroy_cq_user(struct mlx5_ib_cq *cq, struct ib_ucontext *context)
800 {
801 mlx5_ib_db_unmap_user(to_mucontext(context), &cq->db);
802 ib_umem_release(cq->buf.umem);
803 }
804
805 static void init_cq_frag_buf(struct mlx5_ib_cq *cq,
806 struct mlx5_ib_cq_buf *buf)
807 {
808 int i;
809 void *cqe;
810 struct mlx5_cqe64 *cqe64;
811
812 for (i = 0; i < buf->nent; i++) {
813 cqe = get_cqe(cq, i);
814 cqe64 = buf->cqe_size == 64 ? cqe : cqe + 64;
815 cqe64->op_own = MLX5_CQE_INVALID << 4;
816 }
817 }
818
819 static int create_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq,
820 int entries, int cqe_size,
821 u32 **cqb, int *index, int *inlen)
822 {
823 __be64 *pas;
824 void *cqc;
825 int err;
826
827 err = mlx5_db_alloc(dev->mdev, &cq->db);
828 if (err)
829 return err;
830
831 cq->mcq.set_ci_db = cq->db.db;
832 cq->mcq.arm_db = cq->db.db + 1;
833 cq->mcq.cqe_sz = cqe_size;
834
835 err = alloc_cq_frag_buf(dev, &cq->buf, entries, cqe_size);
836 if (err)
837 goto err_db;
838
839 init_cq_frag_buf(cq, &cq->buf);
840
841 *inlen = MLX5_ST_SZ_BYTES(create_cq_in) +
842 MLX5_FLD_SZ_BYTES(create_cq_in, pas[0]) *
843 cq->buf.frag_buf.npages;
844 *cqb = kvzalloc(*inlen, GFP_KERNEL);
845 if (!*cqb) {
846 err = -ENOMEM;
847 goto err_buf;
848 }
849
850 pas = (__be64 *)MLX5_ADDR_OF(create_cq_in, *cqb, pas);
851 mlx5_fill_page_frag_array(&cq->buf.frag_buf, pas);
852
853 cqc = MLX5_ADDR_OF(create_cq_in, *cqb, cq_context);
854 MLX5_SET(cqc, cqc, log_page_size,
855 cq->buf.frag_buf.page_shift -
856 MLX5_ADAPTER_PAGE_SHIFT);
857
858 *index = dev->mdev->priv.uar->index;
859
860 return 0;
861
862 err_buf:
863 free_cq_buf(dev, &cq->buf);
864
865 err_db:
866 mlx5_db_free(dev->mdev, &cq->db);
867 return err;
868 }
869
870 static void destroy_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq)
871 {
872 free_cq_buf(dev, &cq->buf);
873 mlx5_db_free(dev->mdev, &cq->db);
874 }
875
876 static void notify_soft_wc_handler(struct work_struct *work)
877 {
878 struct mlx5_ib_cq *cq = container_of(work, struct mlx5_ib_cq,
879 notify_work);
880
881 cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
882 }
883
884 struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev,
885 const struct ib_cq_init_attr *attr,
886 struct ib_ucontext *context,
887 struct ib_udata *udata)
888 {
889 int entries = attr->cqe;
890 int vector = attr->comp_vector;
891 struct mlx5_ib_dev *dev = to_mdev(ibdev);
892 struct mlx5_ib_cq *cq;
893 int uninitialized_var(index);
894 int uninitialized_var(inlen);
895 u32 *cqb = NULL;
896 void *cqc;
897 int cqe_size;
898 unsigned int irqn;
899 int eqn;
900 int err;
901
902 if (entries < 0 ||
903 (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz))))
904 return ERR_PTR(-EINVAL);
905
906 if (check_cq_create_flags(attr->flags))
907 return ERR_PTR(-EOPNOTSUPP);
908
909 entries = roundup_pow_of_two(entries + 1);
910 if (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz)))
911 return ERR_PTR(-EINVAL);
912
913 cq = kzalloc(sizeof(*cq), GFP_KERNEL);
914 if (!cq)
915 return ERR_PTR(-ENOMEM);
916
917 cq->ibcq.cqe = entries - 1;
918 mutex_init(&cq->resize_mutex);
919 spin_lock_init(&cq->lock);
920 cq->resize_buf = NULL;
921 cq->resize_umem = NULL;
922 cq->create_flags = attr->flags;
923 INIT_LIST_HEAD(&cq->list_send_qp);
924 INIT_LIST_HEAD(&cq->list_recv_qp);
925
926 if (context) {
927 err = create_cq_user(dev, udata, context, cq, entries,
928 &cqb, &cqe_size, &index, &inlen);
929 if (err)
930 goto err_create;
931 } else {
932 cqe_size = cache_line_size() == 128 ? 128 : 64;
933 err = create_cq_kernel(dev, cq, entries, cqe_size, &cqb,
934 &index, &inlen);
935 if (err)
936 goto err_create;
937
938 INIT_WORK(&cq->notify_work, notify_soft_wc_handler);
939 }
940
941 err = mlx5_vector2eqn(dev->mdev, vector, &eqn, &irqn);
942 if (err)
943 goto err_cqb;
944
945 cq->cqe_size = cqe_size;
946
947 cqc = MLX5_ADDR_OF(create_cq_in, cqb, cq_context);
948 MLX5_SET(cqc, cqc, cqe_sz,
949 cqe_sz_to_mlx_sz(cqe_size,
950 cq->private_flags &
951 MLX5_IB_CQ_PR_FLAGS_CQE_128_PAD));
952 MLX5_SET(cqc, cqc, log_cq_size, ilog2(entries));
953 MLX5_SET(cqc, cqc, uar_page, index);
954 MLX5_SET(cqc, cqc, c_eqn, eqn);
955 MLX5_SET64(cqc, cqc, dbr_addr, cq->db.dma);
956 if (cq->create_flags & IB_UVERBS_CQ_FLAGS_IGNORE_OVERRUN)
957 MLX5_SET(cqc, cqc, oi, 1);
958
959 err = mlx5_core_create_cq(dev->mdev, &cq->mcq, cqb, inlen);
960 if (err)
961 goto err_cqb;
962
963 mlx5_ib_dbg(dev, "cqn 0x%x\n", cq->mcq.cqn);
964 cq->mcq.irqn = irqn;
965 if (context)
966 cq->mcq.tasklet_ctx.comp = mlx5_ib_cq_comp;
967 else
968 cq->mcq.comp = mlx5_ib_cq_comp;
969 cq->mcq.event = mlx5_ib_cq_event;
970
971 INIT_LIST_HEAD(&cq->wc_list);
972
973 if (context)
974 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof(__u32))) {
975 err = -EFAULT;
976 goto err_cmd;
977 }
978
979
980 kvfree(cqb);
981 return &cq->ibcq;
982
983 err_cmd:
984 mlx5_core_destroy_cq(dev->mdev, &cq->mcq);
985
986 err_cqb:
987 kvfree(cqb);
988 if (context)
989 destroy_cq_user(cq, context);
990 else
991 destroy_cq_kernel(dev, cq);
992
993 err_create:
994 kfree(cq);
995
996 return ERR_PTR(err);
997 }
998
999
1000 int mlx5_ib_destroy_cq(struct ib_cq *cq)
1001 {
1002 struct mlx5_ib_dev *dev = to_mdev(cq->device);
1003 struct mlx5_ib_cq *mcq = to_mcq(cq);
1004 struct ib_ucontext *context = NULL;
1005
1006 if (cq->uobject)
1007 context = cq->uobject->context;
1008
1009 mlx5_core_destroy_cq(dev->mdev, &mcq->mcq);
1010 if (context)
1011 destroy_cq_user(mcq, context);
1012 else
1013 destroy_cq_kernel(dev, mcq);
1014
1015 kfree(mcq);
1016
1017 return 0;
1018 }
1019
1020 static int is_equal_rsn(struct mlx5_cqe64 *cqe64, u32 rsn)
1021 {
1022 return rsn == (ntohl(cqe64->sop_drop_qpn) & 0xffffff);
1023 }
1024
1025 void __mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 rsn, struct mlx5_ib_srq *srq)
1026 {
1027 struct mlx5_cqe64 *cqe64, *dest64;
1028 void *cqe, *dest;
1029 u32 prod_index;
1030 int nfreed = 0;
1031 u8 owner_bit;
1032
1033 if (!cq)
1034 return;
1035
1036 /* First we need to find the current producer index, so we
1037 * know where to start cleaning from. It doesn't matter if HW
1038 * adds new entries after this loop -- the QP we're worried
1039 * about is already in RESET, so the new entries won't come
1040 * from our QP and therefore don't need to be checked.
1041 */
1042 for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); prod_index++)
1043 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe)
1044 break;
1045
1046 /* Now sweep backwards through the CQ, removing CQ entries
1047 * that match our QP by copying older entries on top of them.
1048 */
1049 while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) {
1050 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe);
1051 cqe64 = (cq->mcq.cqe_sz == 64) ? cqe : cqe + 64;
1052 if (is_equal_rsn(cqe64, rsn)) {
1053 if (srq && (ntohl(cqe64->srqn) & 0xffffff))
1054 mlx5_ib_free_srq_wqe(srq, be16_to_cpu(cqe64->wqe_counter));
1055 ++nfreed;
1056 } else if (nfreed) {
1057 dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe);
1058 dest64 = (cq->mcq.cqe_sz == 64) ? dest : dest + 64;
1059 owner_bit = dest64->op_own & MLX5_CQE_OWNER_MASK;
1060 memcpy(dest, cqe, cq->mcq.cqe_sz);
1061 dest64->op_own = owner_bit |
1062 (dest64->op_own & ~MLX5_CQE_OWNER_MASK);
1063 }
1064 }
1065
1066 if (nfreed) {
1067 cq->mcq.cons_index += nfreed;
1068 /* Make sure update of buffer contents is done before
1069 * updating consumer index.
1070 */
1071 wmb();
1072 mlx5_cq_set_ci(&cq->mcq);
1073 }
1074 }
1075
1076 void mlx5_ib_cq_clean(struct mlx5_ib_cq *cq, u32 qpn, struct mlx5_ib_srq *srq)
1077 {
1078 if (!cq)
1079 return;
1080
1081 spin_lock_irq(&cq->lock);
1082 __mlx5_ib_cq_clean(cq, qpn, srq);
1083 spin_unlock_irq(&cq->lock);
1084 }
1085
1086 int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1087 {
1088 struct mlx5_ib_dev *dev = to_mdev(cq->device);
1089 struct mlx5_ib_cq *mcq = to_mcq(cq);
1090 int err;
1091
1092 if (!MLX5_CAP_GEN(dev->mdev, cq_moderation))
1093 return -EOPNOTSUPP;
1094
1095 if (cq_period > MLX5_MAX_CQ_PERIOD)
1096 return -EINVAL;
1097
1098 err = mlx5_core_modify_cq_moderation(dev->mdev, &mcq->mcq,
1099 cq_period, cq_count);
1100 if (err)
1101 mlx5_ib_warn(dev, "modify cq 0x%x failed\n", mcq->mcq.cqn);
1102
1103 return err;
1104 }
1105
1106 static int resize_user(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq,
1107 int entries, struct ib_udata *udata, int *npas,
1108 int *page_shift, int *cqe_size)
1109 {
1110 struct mlx5_ib_resize_cq ucmd;
1111 struct ib_umem *umem;
1112 int err;
1113 int npages;
1114
1115 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
1116 if (err)
1117 return err;
1118
1119 if (ucmd.reserved0 || ucmd.reserved1)
1120 return -EINVAL;
1121
1122 /* check multiplication overflow */
1123 if (ucmd.cqe_size && SIZE_MAX / ucmd.cqe_size <= entries - 1)
1124 return -EINVAL;
1125
1126 umem = ib_umem_get(udata, ucmd.buf_addr,
1127 (size_t)ucmd.cqe_size * entries,
1128 IB_ACCESS_LOCAL_WRITE, 1);
1129 if (IS_ERR(umem)) {
1130 err = PTR_ERR(umem);
1131 return err;
1132 }
1133
1134 mlx5_ib_cont_pages(umem, ucmd.buf_addr, 0, &npages, page_shift,
1135 npas, NULL);
1136
1137 cq->resize_umem = umem;
1138 *cqe_size = ucmd.cqe_size;
1139
1140 return 0;
1141 }
1142
1143 static void un_resize_user(struct mlx5_ib_cq *cq)
1144 {
1145 ib_umem_release(cq->resize_umem);
1146 }
1147
1148 static int resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq,
1149 int entries, int cqe_size)
1150 {
1151 int err;
1152
1153 cq->resize_buf = kzalloc(sizeof(*cq->resize_buf), GFP_KERNEL);
1154 if (!cq->resize_buf)
1155 return -ENOMEM;
1156
1157 err = alloc_cq_frag_buf(dev, cq->resize_buf, entries, cqe_size);
1158 if (err)
1159 goto ex;
1160
1161 init_cq_frag_buf(cq, cq->resize_buf);
1162
1163 return 0;
1164
1165 ex:
1166 kfree(cq->resize_buf);
1167 return err;
1168 }
1169
1170 static void un_resize_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq)
1171 {
1172 free_cq_buf(dev, cq->resize_buf);
1173 cq->resize_buf = NULL;
1174 }
1175
1176 static int copy_resize_cqes(struct mlx5_ib_cq *cq)
1177 {
1178 struct mlx5_ib_dev *dev = to_mdev(cq->ibcq.device);
1179 struct mlx5_cqe64 *scqe64;
1180 struct mlx5_cqe64 *dcqe64;
1181 void *start_cqe;
1182 void *scqe;
1183 void *dcqe;
1184 int ssize;
1185 int dsize;
1186 int i;
1187 u8 sw_own;
1188
1189 ssize = cq->buf.cqe_size;
1190 dsize = cq->resize_buf->cqe_size;
1191 if (ssize != dsize) {
1192 mlx5_ib_warn(dev, "resize from different cqe size is not supported\n");
1193 return -EINVAL;
1194 }
1195
1196 i = cq->mcq.cons_index;
1197 scqe = get_sw_cqe(cq, i);
1198 scqe64 = ssize == 64 ? scqe : scqe + 64;
1199 start_cqe = scqe;
1200 if (!scqe) {
1201 mlx5_ib_warn(dev, "expected cqe in sw ownership\n");
1202 return -EINVAL;
1203 }
1204
1205 while (get_cqe_opcode(scqe64) != MLX5_CQE_RESIZE_CQ) {
1206 dcqe = mlx5_frag_buf_get_wqe(&cq->resize_buf->fbc,
1207 (i + 1) & cq->resize_buf->nent);
1208 dcqe64 = dsize == 64 ? dcqe : dcqe + 64;
1209 sw_own = sw_ownership_bit(i + 1, cq->resize_buf->nent);
1210 memcpy(dcqe, scqe, dsize);
1211 dcqe64->op_own = (dcqe64->op_own & ~MLX5_CQE_OWNER_MASK) | sw_own;
1212
1213 ++i;
1214 scqe = get_sw_cqe(cq, i);
1215 scqe64 = ssize == 64 ? scqe : scqe + 64;
1216 if (!scqe) {
1217 mlx5_ib_warn(dev, "expected cqe in sw ownership\n");
1218 return -EINVAL;
1219 }
1220
1221 if (scqe == start_cqe) {
1222 pr_warn("resize CQ failed to get resize CQE, CQN 0x%x\n",
1223 cq->mcq.cqn);
1224 return -ENOMEM;
1225 }
1226 }
1227 ++cq->mcq.cons_index;
1228 return 0;
1229 }
1230
1231 int mlx5_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
1232 {
1233 struct mlx5_ib_dev *dev = to_mdev(ibcq->device);
1234 struct mlx5_ib_cq *cq = to_mcq(ibcq);
1235 void *cqc;
1236 u32 *in;
1237 int err;
1238 int npas;
1239 __be64 *pas;
1240 int page_shift;
1241 int inlen;
1242 int uninitialized_var(cqe_size);
1243 unsigned long flags;
1244
1245 if (!MLX5_CAP_GEN(dev->mdev, cq_resize)) {
1246 pr_info("Firmware does not support resize CQ\n");
1247 return -ENOSYS;
1248 }
1249
1250 if (entries < 1 ||
1251 entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz))) {
1252 mlx5_ib_warn(dev, "wrong entries number %d, max %d\n",
1253 entries,
1254 1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz));
1255 return -EINVAL;
1256 }
1257
1258 entries = roundup_pow_of_two(entries + 1);
1259 if (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz)) + 1)
1260 return -EINVAL;
1261
1262 if (entries == ibcq->cqe + 1)
1263 return 0;
1264
1265 mutex_lock(&cq->resize_mutex);
1266 if (udata) {
1267 err = resize_user(dev, cq, entries, udata, &npas, &page_shift,
1268 &cqe_size);
1269 } else {
1270 cqe_size = 64;
1271 err = resize_kernel(dev, cq, entries, cqe_size);
1272 if (!err) {
1273 struct mlx5_frag_buf *frag_buf = &cq->resize_buf->frag_buf;
1274
1275 npas = frag_buf->npages;
1276 page_shift = frag_buf->page_shift;
1277 }
1278 }
1279
1280 if (err)
1281 goto ex;
1282
1283 inlen = MLX5_ST_SZ_BYTES(modify_cq_in) +
1284 MLX5_FLD_SZ_BYTES(modify_cq_in, pas[0]) * npas;
1285
1286 in = kvzalloc(inlen, GFP_KERNEL);
1287 if (!in) {
1288 err = -ENOMEM;
1289 goto ex_resize;
1290 }
1291
1292 pas = (__be64 *)MLX5_ADDR_OF(modify_cq_in, in, pas);
1293 if (udata)
1294 mlx5_ib_populate_pas(dev, cq->resize_umem, page_shift,
1295 pas, 0);
1296 else
1297 mlx5_fill_page_frag_array(&cq->resize_buf->frag_buf, pas);
1298
1299 MLX5_SET(modify_cq_in, in,
1300 modify_field_select_resize_field_select.resize_field_select.resize_field_select,
1301 MLX5_MODIFY_CQ_MASK_LOG_SIZE |
1302 MLX5_MODIFY_CQ_MASK_PG_OFFSET |
1303 MLX5_MODIFY_CQ_MASK_PG_SIZE);
1304
1305 cqc = MLX5_ADDR_OF(modify_cq_in, in, cq_context);
1306
1307 MLX5_SET(cqc, cqc, log_page_size,
1308 page_shift - MLX5_ADAPTER_PAGE_SHIFT);
1309 MLX5_SET(cqc, cqc, cqe_sz,
1310 cqe_sz_to_mlx_sz(cqe_size,
1311 cq->private_flags &
1312 MLX5_IB_CQ_PR_FLAGS_CQE_128_PAD));
1313 MLX5_SET(cqc, cqc, log_cq_size, ilog2(entries));
1314
1315 MLX5_SET(modify_cq_in, in, op_mod, MLX5_CQ_OPMOD_RESIZE);
1316 MLX5_SET(modify_cq_in, in, cqn, cq->mcq.cqn);
1317
1318 err = mlx5_core_modify_cq(dev->mdev, &cq->mcq, in, inlen);
1319 if (err)
1320 goto ex_alloc;
1321
1322 if (udata) {
1323 cq->ibcq.cqe = entries - 1;
1324 ib_umem_release(cq->buf.umem);
1325 cq->buf.umem = cq->resize_umem;
1326 cq->resize_umem = NULL;
1327 } else {
1328 struct mlx5_ib_cq_buf tbuf;
1329 int resized = 0;
1330
1331 spin_lock_irqsave(&cq->lock, flags);
1332 if (cq->resize_buf) {
1333 err = copy_resize_cqes(cq);
1334 if (!err) {
1335 tbuf = cq->buf;
1336 cq->buf = *cq->resize_buf;
1337 kfree(cq->resize_buf);
1338 cq->resize_buf = NULL;
1339 resized = 1;
1340 }
1341 }
1342 cq->ibcq.cqe = entries - 1;
1343 spin_unlock_irqrestore(&cq->lock, flags);
1344 if (resized)
1345 free_cq_buf(dev, &tbuf);
1346 }
1347 mutex_unlock(&cq->resize_mutex);
1348
1349 kvfree(in);
1350 return 0;
1351
1352 ex_alloc:
1353 kvfree(in);
1354
1355 ex_resize:
1356 if (udata)
1357 un_resize_user(cq);
1358 else
1359 un_resize_kernel(dev, cq);
1360 ex:
1361 mutex_unlock(&cq->resize_mutex);
1362 return err;
1363 }
1364
1365 int mlx5_ib_get_cqe_size(struct ib_cq *ibcq)
1366 {
1367 struct mlx5_ib_cq *cq;
1368
1369 if (!ibcq)
1370 return 128;
1371
1372 cq = to_mcq(ibcq);
1373 return cq->cqe_size;
1374 }
1375
1376 /* Called from atomic context */
1377 int mlx5_ib_generate_wc(struct ib_cq *ibcq, struct ib_wc *wc)
1378 {
1379 struct mlx5_ib_wc *soft_wc;
1380 struct mlx5_ib_cq *cq = to_mcq(ibcq);
1381 unsigned long flags;
1382
1383 soft_wc = kmalloc(sizeof(*soft_wc), GFP_ATOMIC);
1384 if (!soft_wc)
1385 return -ENOMEM;
1386
1387 soft_wc->wc = *wc;
1388 spin_lock_irqsave(&cq->lock, flags);
1389 list_add_tail(&soft_wc->list, &cq->wc_list);
1390 if (cq->notify_flags == IB_CQ_NEXT_COMP ||
1391 wc->status != IB_WC_SUCCESS) {
1392 cq->notify_flags = 0;
1393 schedule_work(&cq->notify_work);
1394 }
1395 spin_unlock_irqrestore(&cq->lock, flags);
1396
1397 return 0;
1398 }
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