]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/infiniband/hw/mlx5/qp.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mlx5: Add driver for Mellanox Connect-IB adapters
[mirror_ubuntu-bionic-kernel.git] / drivers / infiniband / hw / mlx5 / qp.c
1 /*
2 * Copyright (c) 2013, Mellanox Technologies inc. 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/module.h>
34 #include <rdma/ib_umem.h>
35 #include "mlx5_ib.h"
36 #include "user.h"
37
38 /* not supported currently */
39 static int wq_signature;
40
41 enum {
42 MLX5_IB_ACK_REQ_FREQ = 8,
43 };
44
45 enum {
46 MLX5_IB_DEFAULT_SCHED_QUEUE = 0x83,
47 MLX5_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
48 MLX5_IB_LINK_TYPE_IB = 0,
49 MLX5_IB_LINK_TYPE_ETH = 1
50 };
51
52 enum {
53 MLX5_IB_SQ_STRIDE = 6,
54 MLX5_IB_CACHE_LINE_SIZE = 64,
55 };
56
57 static const u32 mlx5_ib_opcode[] = {
58 [IB_WR_SEND] = MLX5_OPCODE_SEND,
59 [IB_WR_SEND_WITH_IMM] = MLX5_OPCODE_SEND_IMM,
60 [IB_WR_RDMA_WRITE] = MLX5_OPCODE_RDMA_WRITE,
61 [IB_WR_RDMA_WRITE_WITH_IMM] = MLX5_OPCODE_RDMA_WRITE_IMM,
62 [IB_WR_RDMA_READ] = MLX5_OPCODE_RDMA_READ,
63 [IB_WR_ATOMIC_CMP_AND_SWP] = MLX5_OPCODE_ATOMIC_CS,
64 [IB_WR_ATOMIC_FETCH_AND_ADD] = MLX5_OPCODE_ATOMIC_FA,
65 [IB_WR_SEND_WITH_INV] = MLX5_OPCODE_SEND_INVAL,
66 [IB_WR_LOCAL_INV] = MLX5_OPCODE_UMR,
67 [IB_WR_FAST_REG_MR] = MLX5_OPCODE_UMR,
68 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = MLX5_OPCODE_ATOMIC_MASKED_CS,
69 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = MLX5_OPCODE_ATOMIC_MASKED_FA,
70 [MLX5_IB_WR_UMR] = MLX5_OPCODE_UMR,
71 };
72
73 struct umr_wr {
74 u64 virt_addr;
75 struct ib_pd *pd;
76 unsigned int page_shift;
77 unsigned int npages;
78 u32 length;
79 int access_flags;
80 u32 mkey;
81 };
82
83 static int is_qp0(enum ib_qp_type qp_type)
84 {
85 return qp_type == IB_QPT_SMI;
86 }
87
88 static int is_qp1(enum ib_qp_type qp_type)
89 {
90 return qp_type == IB_QPT_GSI;
91 }
92
93 static int is_sqp(enum ib_qp_type qp_type)
94 {
95 return is_qp0(qp_type) || is_qp1(qp_type);
96 }
97
98 static void *get_wqe(struct mlx5_ib_qp *qp, int offset)
99 {
100 return mlx5_buf_offset(&qp->buf, offset);
101 }
102
103 static void *get_recv_wqe(struct mlx5_ib_qp *qp, int n)
104 {
105 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
106 }
107
108 void *mlx5_get_send_wqe(struct mlx5_ib_qp *qp, int n)
109 {
110 return get_wqe(qp, qp->sq.offset + (n << MLX5_IB_SQ_STRIDE));
111 }
112
113 static void mlx5_ib_qp_event(struct mlx5_core_qp *qp, int type)
114 {
115 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
116 struct ib_event event;
117
118 if (type == MLX5_EVENT_TYPE_PATH_MIG)
119 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
120
121 if (ibqp->event_handler) {
122 event.device = ibqp->device;
123 event.element.qp = ibqp;
124 switch (type) {
125 case MLX5_EVENT_TYPE_PATH_MIG:
126 event.event = IB_EVENT_PATH_MIG;
127 break;
128 case MLX5_EVENT_TYPE_COMM_EST:
129 event.event = IB_EVENT_COMM_EST;
130 break;
131 case MLX5_EVENT_TYPE_SQ_DRAINED:
132 event.event = IB_EVENT_SQ_DRAINED;
133 break;
134 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
135 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
136 break;
137 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
138 event.event = IB_EVENT_QP_FATAL;
139 break;
140 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
141 event.event = IB_EVENT_PATH_MIG_ERR;
142 break;
143 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
144 event.event = IB_EVENT_QP_REQ_ERR;
145 break;
146 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
147 event.event = IB_EVENT_QP_ACCESS_ERR;
148 break;
149 default:
150 pr_warn("mlx5_ib: Unexpected event type %d on QP %06x\n", type, qp->qpn);
151 return;
152 }
153
154 ibqp->event_handler(&event, ibqp->qp_context);
155 }
156 }
157
158 static int set_rq_size(struct mlx5_ib_dev *dev, struct ib_qp_cap *cap,
159 int has_rq, struct mlx5_ib_qp *qp, struct mlx5_ib_create_qp *ucmd)
160 {
161 int wqe_size;
162 int wq_size;
163
164 /* Sanity check RQ size before proceeding */
165 if (cap->max_recv_wr > dev->mdev.caps.max_wqes)
166 return -EINVAL;
167
168 if (!has_rq) {
169 qp->rq.max_gs = 0;
170 qp->rq.wqe_cnt = 0;
171 qp->rq.wqe_shift = 0;
172 } else {
173 if (ucmd) {
174 qp->rq.wqe_cnt = ucmd->rq_wqe_count;
175 qp->rq.wqe_shift = ucmd->rq_wqe_shift;
176 qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig;
177 qp->rq.max_post = qp->rq.wqe_cnt;
178 } else {
179 wqe_size = qp->wq_sig ? sizeof(struct mlx5_wqe_signature_seg) : 0;
180 wqe_size += cap->max_recv_sge * sizeof(struct mlx5_wqe_data_seg);
181 wqe_size = roundup_pow_of_two(wqe_size);
182 wq_size = roundup_pow_of_two(cap->max_recv_wr) * wqe_size;
183 wq_size = max_t(int, wq_size, MLX5_SEND_WQE_BB);
184 qp->rq.wqe_cnt = wq_size / wqe_size;
185 if (wqe_size > dev->mdev.caps.max_rq_desc_sz) {
186 mlx5_ib_dbg(dev, "wqe_size %d, max %d\n",
187 wqe_size,
188 dev->mdev.caps.max_rq_desc_sz);
189 return -EINVAL;
190 }
191 qp->rq.wqe_shift = ilog2(wqe_size);
192 qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig;
193 qp->rq.max_post = qp->rq.wqe_cnt;
194 }
195 }
196
197 return 0;
198 }
199
200 static int sq_overhead(enum ib_qp_type qp_type)
201 {
202 int size;
203
204 switch (qp_type) {
205 case IB_QPT_XRC_INI:
206 size = sizeof(struct mlx5_wqe_xrc_seg);
207 /* fall through */
208 case IB_QPT_RC:
209 size += sizeof(struct mlx5_wqe_ctrl_seg) +
210 sizeof(struct mlx5_wqe_atomic_seg) +
211 sizeof(struct mlx5_wqe_raddr_seg);
212 break;
213
214 case IB_QPT_UC:
215 size = sizeof(struct mlx5_wqe_ctrl_seg) +
216 sizeof(struct mlx5_wqe_raddr_seg);
217 break;
218
219 case IB_QPT_UD:
220 case IB_QPT_SMI:
221 case IB_QPT_GSI:
222 size = sizeof(struct mlx5_wqe_ctrl_seg) +
223 sizeof(struct mlx5_wqe_datagram_seg);
224 break;
225
226 case MLX5_IB_QPT_REG_UMR:
227 size = sizeof(struct mlx5_wqe_ctrl_seg) +
228 sizeof(struct mlx5_wqe_umr_ctrl_seg) +
229 sizeof(struct mlx5_mkey_seg);
230 break;
231
232 default:
233 return -EINVAL;
234 }
235
236 return size;
237 }
238
239 static int calc_send_wqe(struct ib_qp_init_attr *attr)
240 {
241 int inl_size = 0;
242 int size;
243
244 size = sq_overhead(attr->qp_type);
245 if (size < 0)
246 return size;
247
248 if (attr->cap.max_inline_data) {
249 inl_size = size + sizeof(struct mlx5_wqe_inline_seg) +
250 attr->cap.max_inline_data;
251 }
252
253 size += attr->cap.max_send_sge * sizeof(struct mlx5_wqe_data_seg);
254
255 return ALIGN(max_t(int, inl_size, size), MLX5_SEND_WQE_BB);
256 }
257
258 static int calc_sq_size(struct mlx5_ib_dev *dev, struct ib_qp_init_attr *attr,
259 struct mlx5_ib_qp *qp)
260 {
261 int wqe_size;
262 int wq_size;
263
264 if (!attr->cap.max_send_wr)
265 return 0;
266
267 wqe_size = calc_send_wqe(attr);
268 mlx5_ib_dbg(dev, "wqe_size %d\n", wqe_size);
269 if (wqe_size < 0)
270 return wqe_size;
271
272 if (wqe_size > dev->mdev.caps.max_sq_desc_sz) {
273 mlx5_ib_dbg(dev, "\n");
274 return -EINVAL;
275 }
276
277 qp->max_inline_data = wqe_size - sq_overhead(attr->qp_type) -
278 sizeof(struct mlx5_wqe_inline_seg);
279 attr->cap.max_inline_data = qp->max_inline_data;
280
281 wq_size = roundup_pow_of_two(attr->cap.max_send_wr * wqe_size);
282 qp->sq.wqe_cnt = wq_size / MLX5_SEND_WQE_BB;
283 qp->sq.wqe_shift = ilog2(MLX5_SEND_WQE_BB);
284 qp->sq.max_gs = attr->cap.max_send_sge;
285 qp->sq.max_post = 1 << ilog2(wq_size / wqe_size);
286
287 return wq_size;
288 }
289
290 static int set_user_buf_size(struct mlx5_ib_dev *dev,
291 struct mlx5_ib_qp *qp,
292 struct mlx5_ib_create_qp *ucmd)
293 {
294 int desc_sz = 1 << qp->sq.wqe_shift;
295
296 if (desc_sz > dev->mdev.caps.max_sq_desc_sz) {
297 mlx5_ib_warn(dev, "desc_sz %d, max_sq_desc_sz %d\n",
298 desc_sz, dev->mdev.caps.max_sq_desc_sz);
299 return -EINVAL;
300 }
301
302 if (ucmd->sq_wqe_count && ((1 << ilog2(ucmd->sq_wqe_count)) != ucmd->sq_wqe_count)) {
303 mlx5_ib_warn(dev, "sq_wqe_count %d, sq_wqe_count %d\n",
304 ucmd->sq_wqe_count, ucmd->sq_wqe_count);
305 return -EINVAL;
306 }
307
308 qp->sq.wqe_cnt = ucmd->sq_wqe_count;
309
310 if (qp->sq.wqe_cnt > dev->mdev.caps.max_wqes) {
311 mlx5_ib_warn(dev, "wqe_cnt %d, max_wqes %d\n",
312 qp->sq.wqe_cnt, dev->mdev.caps.max_wqes);
313 return -EINVAL;
314 }
315
316 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
317 (qp->sq.wqe_cnt << 6);
318
319 return 0;
320 }
321
322 static int qp_has_rq(struct ib_qp_init_attr *attr)
323 {
324 if (attr->qp_type == IB_QPT_XRC_INI ||
325 attr->qp_type == IB_QPT_XRC_TGT || attr->srq ||
326 attr->qp_type == MLX5_IB_QPT_REG_UMR ||
327 !attr->cap.max_recv_wr)
328 return 0;
329
330 return 1;
331 }
332
333 static int alloc_high_class_uuar(struct mlx5_uuar_info *uuari)
334 {
335 int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE;
336 int start_uuar;
337 int i;
338
339 start_uuar = nuuars - uuari->num_low_latency_uuars;
340 for (i = start_uuar; i < nuuars; i++) {
341 if (!test_bit(i, uuari->bitmap)) {
342 set_bit(i, uuari->bitmap);
343 uuari->count[i]++;
344 return i;
345 }
346 }
347
348 return -ENOMEM;
349 }
350
351 static int alloc_med_class_uuar(struct mlx5_uuar_info *uuari)
352 {
353 int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE;
354 int minidx = 1;
355 int uuarn;
356 int end;
357 int i;
358
359 end = nuuars - uuari->num_low_latency_uuars;
360
361 for (i = 1; i < end; i++) {
362 uuarn = i & 3;
363 if (uuarn == 2 || uuarn == 3)
364 continue;
365
366 if (uuari->count[i] < uuari->count[minidx])
367 minidx = i;
368 }
369
370 uuari->count[minidx]++;
371 return minidx;
372 }
373
374 static int alloc_uuar(struct mlx5_uuar_info *uuari,
375 enum mlx5_ib_latency_class lat)
376 {
377 int uuarn = -EINVAL;
378
379 mutex_lock(&uuari->lock);
380 switch (lat) {
381 case MLX5_IB_LATENCY_CLASS_LOW:
382 uuarn = 0;
383 uuari->count[uuarn]++;
384 break;
385
386 case MLX5_IB_LATENCY_CLASS_MEDIUM:
387 uuarn = alloc_med_class_uuar(uuari);
388 break;
389
390 case MLX5_IB_LATENCY_CLASS_HIGH:
391 uuarn = alloc_high_class_uuar(uuari);
392 break;
393
394 case MLX5_IB_LATENCY_CLASS_FAST_PATH:
395 uuarn = 2;
396 break;
397 }
398 mutex_unlock(&uuari->lock);
399
400 return uuarn;
401 }
402
403 static void free_med_class_uuar(struct mlx5_uuar_info *uuari, int uuarn)
404 {
405 clear_bit(uuarn, uuari->bitmap);
406 --uuari->count[uuarn];
407 }
408
409 static void free_high_class_uuar(struct mlx5_uuar_info *uuari, int uuarn)
410 {
411 clear_bit(uuarn, uuari->bitmap);
412 --uuari->count[uuarn];
413 }
414
415 static void free_uuar(struct mlx5_uuar_info *uuari, int uuarn)
416 {
417 int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE;
418 int high_uuar = nuuars - uuari->num_low_latency_uuars;
419
420 mutex_lock(&uuari->lock);
421 if (uuarn == 0) {
422 --uuari->count[uuarn];
423 goto out;
424 }
425
426 if (uuarn < high_uuar) {
427 free_med_class_uuar(uuari, uuarn);
428 goto out;
429 }
430
431 free_high_class_uuar(uuari, uuarn);
432
433 out:
434 mutex_unlock(&uuari->lock);
435 }
436
437 static enum mlx5_qp_state to_mlx5_state(enum ib_qp_state state)
438 {
439 switch (state) {
440 case IB_QPS_RESET: return MLX5_QP_STATE_RST;
441 case IB_QPS_INIT: return MLX5_QP_STATE_INIT;
442 case IB_QPS_RTR: return MLX5_QP_STATE_RTR;
443 case IB_QPS_RTS: return MLX5_QP_STATE_RTS;
444 case IB_QPS_SQD: return MLX5_QP_STATE_SQD;
445 case IB_QPS_SQE: return MLX5_QP_STATE_SQER;
446 case IB_QPS_ERR: return MLX5_QP_STATE_ERR;
447 default: return -1;
448 }
449 }
450
451 static int to_mlx5_st(enum ib_qp_type type)
452 {
453 switch (type) {
454 case IB_QPT_RC: return MLX5_QP_ST_RC;
455 case IB_QPT_UC: return MLX5_QP_ST_UC;
456 case IB_QPT_UD: return MLX5_QP_ST_UD;
457 case MLX5_IB_QPT_REG_UMR: return MLX5_QP_ST_REG_UMR;
458 case IB_QPT_XRC_INI:
459 case IB_QPT_XRC_TGT: return MLX5_QP_ST_XRC;
460 case IB_QPT_SMI: return MLX5_QP_ST_QP0;
461 case IB_QPT_GSI: return MLX5_QP_ST_QP1;
462 case IB_QPT_RAW_IPV6: return MLX5_QP_ST_RAW_IPV6;
463 case IB_QPT_RAW_ETHERTYPE: return MLX5_QP_ST_RAW_ETHERTYPE;
464 case IB_QPT_RAW_PACKET:
465 case IB_QPT_MAX:
466 default: return -EINVAL;
467 }
468 }
469
470 static int uuarn_to_uar_index(struct mlx5_uuar_info *uuari, int uuarn)
471 {
472 return uuari->uars[uuarn / MLX5_BF_REGS_PER_PAGE].index;
473 }
474
475 static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
476 struct mlx5_ib_qp *qp, struct ib_udata *udata,
477 struct mlx5_create_qp_mbox_in **in,
478 struct mlx5_ib_create_qp_resp *resp, int *inlen)
479 {
480 struct mlx5_ib_ucontext *context;
481 struct mlx5_ib_create_qp ucmd;
482 int page_shift;
483 int uar_index;
484 int npages;
485 u32 offset;
486 int uuarn;
487 int ncont;
488 int err;
489
490 err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
491 if (err) {
492 mlx5_ib_dbg(dev, "copy failed\n");
493 return err;
494 }
495
496 context = to_mucontext(pd->uobject->context);
497 /*
498 * TBD: should come from the verbs when we have the API
499 */
500 uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_HIGH);
501 if (uuarn < 0) {
502 mlx5_ib_dbg(dev, "failed to allocate low latency UUAR\n");
503 mlx5_ib_dbg(dev, "reverting to high latency\n");
504 uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_LOW);
505 if (uuarn < 0) {
506 mlx5_ib_dbg(dev, "uuar allocation failed\n");
507 return uuarn;
508 }
509 }
510
511 uar_index = uuarn_to_uar_index(&context->uuari, uuarn);
512 mlx5_ib_dbg(dev, "uuarn 0x%x, uar_index 0x%x\n", uuarn, uar_index);
513
514 err = set_user_buf_size(dev, qp, &ucmd);
515 if (err)
516 goto err_uuar;
517
518 qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
519 qp->buf_size, 0, 0);
520 if (IS_ERR(qp->umem)) {
521 mlx5_ib_dbg(dev, "umem_get failed\n");
522 err = PTR_ERR(qp->umem);
523 goto err_uuar;
524 }
525
526 mlx5_ib_cont_pages(qp->umem, ucmd.buf_addr, &npages, &page_shift,
527 &ncont, NULL);
528 err = mlx5_ib_get_buf_offset(ucmd.buf_addr, page_shift, &offset);
529 if (err) {
530 mlx5_ib_warn(dev, "bad offset\n");
531 goto err_umem;
532 }
533 mlx5_ib_dbg(dev, "addr 0x%llx, size %d, npages %d, page_shift %d, ncont %d, offset %d\n",
534 ucmd.buf_addr, qp->buf_size, npages, page_shift, ncont, offset);
535
536 *inlen = sizeof(**in) + sizeof(*(*in)->pas) * ncont;
537 *in = mlx5_vzalloc(*inlen);
538 if (!*in) {
539 err = -ENOMEM;
540 goto err_umem;
541 }
542 mlx5_ib_populate_pas(dev, qp->umem, page_shift, (*in)->pas, 0);
543 (*in)->ctx.log_pg_sz_remote_qpn =
544 cpu_to_be32((page_shift - PAGE_SHIFT) << 24);
545 (*in)->ctx.params2 = cpu_to_be32(offset << 6);
546
547 (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index);
548 resp->uuar_index = uuarn;
549 qp->uuarn = uuarn;
550
551 err = mlx5_ib_db_map_user(context, ucmd.db_addr, &qp->db);
552 if (err) {
553 mlx5_ib_dbg(dev, "map failed\n");
554 goto err_free;
555 }
556
557 err = ib_copy_to_udata(udata, resp, sizeof(*resp));
558 if (err) {
559 mlx5_ib_dbg(dev, "copy failed\n");
560 goto err_unmap;
561 }
562 qp->create_type = MLX5_QP_USER;
563
564 return 0;
565
566 err_unmap:
567 mlx5_ib_db_unmap_user(context, &qp->db);
568
569 err_free:
570 mlx5_vfree(*in);
571
572 err_umem:
573 ib_umem_release(qp->umem);
574
575 err_uuar:
576 free_uuar(&context->uuari, uuarn);
577 return err;
578 }
579
580 static void destroy_qp_user(struct ib_pd *pd, struct mlx5_ib_qp *qp)
581 {
582 struct mlx5_ib_ucontext *context;
583
584 context = to_mucontext(pd->uobject->context);
585 mlx5_ib_db_unmap_user(context, &qp->db);
586 ib_umem_release(qp->umem);
587 free_uuar(&context->uuari, qp->uuarn);
588 }
589
590 static int create_kernel_qp(struct mlx5_ib_dev *dev,
591 struct ib_qp_init_attr *init_attr,
592 struct mlx5_ib_qp *qp,
593 struct mlx5_create_qp_mbox_in **in, int *inlen)
594 {
595 enum mlx5_ib_latency_class lc = MLX5_IB_LATENCY_CLASS_LOW;
596 struct mlx5_uuar_info *uuari;
597 int uar_index;
598 int uuarn;
599 int err;
600
601 uuari = &dev->mdev.priv.uuari;
602 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
603 qp->flags |= MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK;
604
605 if (init_attr->qp_type == MLX5_IB_QPT_REG_UMR)
606 lc = MLX5_IB_LATENCY_CLASS_FAST_PATH;
607
608 uuarn = alloc_uuar(uuari, lc);
609 if (uuarn < 0) {
610 mlx5_ib_dbg(dev, "\n");
611 return -ENOMEM;
612 }
613
614 qp->bf = &uuari->bfs[uuarn];
615 uar_index = qp->bf->uar->index;
616
617 err = calc_sq_size(dev, init_attr, qp);
618 if (err < 0) {
619 mlx5_ib_dbg(dev, "err %d\n", err);
620 goto err_uuar;
621 }
622
623 qp->rq.offset = 0;
624 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
625 qp->buf_size = err + (qp->rq.wqe_cnt << qp->rq.wqe_shift);
626
627 err = mlx5_buf_alloc(&dev->mdev, qp->buf_size, PAGE_SIZE * 2, &qp->buf);
628 if (err) {
629 mlx5_ib_dbg(dev, "err %d\n", err);
630 goto err_uuar;
631 }
632
633 qp->sq.qend = mlx5_get_send_wqe(qp, qp->sq.wqe_cnt);
634 *inlen = sizeof(**in) + sizeof(*(*in)->pas) * qp->buf.npages;
635 *in = mlx5_vzalloc(*inlen);
636 if (!*in) {
637 err = -ENOMEM;
638 goto err_buf;
639 }
640 (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index);
641 (*in)->ctx.log_pg_sz_remote_qpn = cpu_to_be32((qp->buf.page_shift - PAGE_SHIFT) << 24);
642 /* Set "fast registration enabled" for all kernel QPs */
643 (*in)->ctx.params1 |= cpu_to_be32(1 << 11);
644 (*in)->ctx.sq_crq_size |= cpu_to_be16(1 << 4);
645
646 mlx5_fill_page_array(&qp->buf, (*in)->pas);
647
648 err = mlx5_db_alloc(&dev->mdev, &qp->db);
649 if (err) {
650 mlx5_ib_dbg(dev, "err %d\n", err);
651 goto err_free;
652 }
653
654 qp->db.db[0] = 0;
655 qp->db.db[1] = 0;
656
657 qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wrid), GFP_KERNEL);
658 qp->sq.wr_data = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wr_data), GFP_KERNEL);
659 qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof(*qp->rq.wrid), GFP_KERNEL);
660 qp->sq.w_list = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.w_list), GFP_KERNEL);
661 qp->sq.wqe_head = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wqe_head), GFP_KERNEL);
662
663 if (!qp->sq.wrid || !qp->sq.wr_data || !qp->rq.wrid ||
664 !qp->sq.w_list || !qp->sq.wqe_head) {
665 err = -ENOMEM;
666 goto err_wrid;
667 }
668 qp->create_type = MLX5_QP_KERNEL;
669
670 return 0;
671
672 err_wrid:
673 mlx5_db_free(&dev->mdev, &qp->db);
674 kfree(qp->sq.wqe_head);
675 kfree(qp->sq.w_list);
676 kfree(qp->sq.wrid);
677 kfree(qp->sq.wr_data);
678 kfree(qp->rq.wrid);
679
680 err_free:
681 mlx5_vfree(*in);
682
683 err_buf:
684 mlx5_buf_free(&dev->mdev, &qp->buf);
685
686 err_uuar:
687 free_uuar(&dev->mdev.priv.uuari, uuarn);
688 return err;
689 }
690
691 static void destroy_qp_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp)
692 {
693 mlx5_db_free(&dev->mdev, &qp->db);
694 kfree(qp->sq.wqe_head);
695 kfree(qp->sq.w_list);
696 kfree(qp->sq.wrid);
697 kfree(qp->sq.wr_data);
698 kfree(qp->rq.wrid);
699 mlx5_buf_free(&dev->mdev, &qp->buf);
700 free_uuar(&dev->mdev.priv.uuari, qp->bf->uuarn);
701 }
702
703 static __be32 get_rx_type(struct mlx5_ib_qp *qp, struct ib_qp_init_attr *attr)
704 {
705 if (attr->srq || (attr->qp_type == IB_QPT_XRC_TGT) ||
706 (attr->qp_type == IB_QPT_XRC_INI))
707 return cpu_to_be32(MLX5_SRQ_RQ);
708 else if (!qp->has_rq)
709 return cpu_to_be32(MLX5_ZERO_LEN_RQ);
710 else
711 return cpu_to_be32(MLX5_NON_ZERO_RQ);
712 }
713
714 static int is_connected(enum ib_qp_type qp_type)
715 {
716 if (qp_type == IB_QPT_RC || qp_type == IB_QPT_UC)
717 return 1;
718
719 return 0;
720 }
721
722 static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
723 struct ib_qp_init_attr *init_attr,
724 struct ib_udata *udata, struct mlx5_ib_qp *qp)
725 {
726 struct mlx5_ib_resources *devr = &dev->devr;
727 struct mlx5_ib_create_qp_resp resp;
728 struct mlx5_create_qp_mbox_in *in;
729 struct mlx5_ib_create_qp ucmd;
730 int inlen = sizeof(*in);
731 int err;
732
733 mutex_init(&qp->mutex);
734 spin_lock_init(&qp->sq.lock);
735 spin_lock_init(&qp->rq.lock);
736
737 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
738 qp->sq_signal_bits = MLX5_WQE_CTRL_CQ_UPDATE;
739
740 if (pd && pd->uobject) {
741 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
742 mlx5_ib_dbg(dev, "copy failed\n");
743 return -EFAULT;
744 }
745
746 qp->wq_sig = !!(ucmd.flags & MLX5_QP_FLAG_SIGNATURE);
747 qp->scat_cqe = !!(ucmd.flags & MLX5_QP_FLAG_SCATTER_CQE);
748 } else {
749 qp->wq_sig = !!wq_signature;
750 }
751
752 qp->has_rq = qp_has_rq(init_attr);
753 err = set_rq_size(dev, &init_attr->cap, qp->has_rq,
754 qp, (pd && pd->uobject) ? &ucmd : NULL);
755 if (err) {
756 mlx5_ib_dbg(dev, "err %d\n", err);
757 return err;
758 }
759
760 if (pd) {
761 if (pd->uobject) {
762 mlx5_ib_dbg(dev, "requested sq_wqe_count (%d)\n", ucmd.sq_wqe_count);
763 if (ucmd.rq_wqe_shift != qp->rq.wqe_shift ||
764 ucmd.rq_wqe_count != qp->rq.wqe_cnt) {
765 mlx5_ib_dbg(dev, "invalid rq params\n");
766 return -EINVAL;
767 }
768 if (ucmd.sq_wqe_count > dev->mdev.caps.max_wqes) {
769 mlx5_ib_dbg(dev, "requested sq_wqe_count (%d) > max allowed (%d)\n",
770 ucmd.sq_wqe_count, dev->mdev.caps.max_wqes);
771 return -EINVAL;
772 }
773 err = create_user_qp(dev, pd, qp, udata, &in, &resp, &inlen);
774 if (err)
775 mlx5_ib_dbg(dev, "err %d\n", err);
776 } else {
777 err = create_kernel_qp(dev, init_attr, qp, &in, &inlen);
778 if (err)
779 mlx5_ib_dbg(dev, "err %d\n", err);
780 else
781 qp->pa_lkey = to_mpd(pd)->pa_lkey;
782 }
783
784 if (err)
785 return err;
786 } else {
787 in = mlx5_vzalloc(sizeof(*in));
788 if (!in)
789 return -ENOMEM;
790
791 qp->create_type = MLX5_QP_EMPTY;
792 }
793
794 if (is_sqp(init_attr->qp_type))
795 qp->port = init_attr->port_num;
796
797 in->ctx.flags = cpu_to_be32(to_mlx5_st(init_attr->qp_type) << 16 |
798 MLX5_QP_PM_MIGRATED << 11);
799
800 if (init_attr->qp_type != MLX5_IB_QPT_REG_UMR)
801 in->ctx.flags_pd = cpu_to_be32(to_mpd(pd ? pd : devr->p0)->pdn);
802 else
803 in->ctx.flags_pd = cpu_to_be32(MLX5_QP_LAT_SENSITIVE);
804
805 if (qp->wq_sig)
806 in->ctx.flags_pd |= cpu_to_be32(MLX5_QP_ENABLE_SIG);
807
808 if (qp->scat_cqe && is_connected(init_attr->qp_type)) {
809 int rcqe_sz;
810 int scqe_sz;
811
812 rcqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->recv_cq);
813 scqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->send_cq);
814
815 if (rcqe_sz == 128)
816 in->ctx.cs_res = MLX5_RES_SCAT_DATA64_CQE;
817 else
818 in->ctx.cs_res = MLX5_RES_SCAT_DATA32_CQE;
819
820 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) {
821 if (scqe_sz == 128)
822 in->ctx.cs_req = MLX5_REQ_SCAT_DATA64_CQE;
823 else
824 in->ctx.cs_req = MLX5_REQ_SCAT_DATA32_CQE;
825 }
826 }
827
828 if (qp->rq.wqe_cnt) {
829 in->ctx.rq_size_stride = (qp->rq.wqe_shift - 4);
830 in->ctx.rq_size_stride |= ilog2(qp->rq.wqe_cnt) << 3;
831 }
832
833 in->ctx.rq_type_srqn = get_rx_type(qp, init_attr);
834
835 if (qp->sq.wqe_cnt)
836 in->ctx.sq_crq_size |= cpu_to_be16(ilog2(qp->sq.wqe_cnt) << 11);
837 else
838 in->ctx.sq_crq_size |= cpu_to_be16(0x8000);
839
840 /* Set default resources */
841 switch (init_attr->qp_type) {
842 case IB_QPT_XRC_TGT:
843 in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn);
844 in->ctx.cqn_send = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn);
845 in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn);
846 in->ctx.xrcd = cpu_to_be32(to_mxrcd(init_attr->xrcd)->xrcdn);
847 break;
848 case IB_QPT_XRC_INI:
849 in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn);
850 in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn);
851 in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn);
852 break;
853 default:
854 if (init_attr->srq) {
855 in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x0)->xrcdn);
856 in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(init_attr->srq)->msrq.srqn);
857 } else {
858 in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn);
859 in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn);
860 }
861 }
862
863 if (init_attr->send_cq)
864 in->ctx.cqn_send = cpu_to_be32(to_mcq(init_attr->send_cq)->mcq.cqn);
865
866 if (init_attr->recv_cq)
867 in->ctx.cqn_recv = cpu_to_be32(to_mcq(init_attr->recv_cq)->mcq.cqn);
868
869 in->ctx.db_rec_addr = cpu_to_be64(qp->db.dma);
870
871 err = mlx5_core_create_qp(&dev->mdev, &qp->mqp, in, inlen);
872 if (err) {
873 mlx5_ib_dbg(dev, "create qp failed\n");
874 goto err_create;
875 }
876
877 mlx5_vfree(in);
878 /* Hardware wants QPN written in big-endian order (after
879 * shifting) for send doorbell. Precompute this value to save
880 * a little bit when posting sends.
881 */
882 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
883
884 qp->mqp.event = mlx5_ib_qp_event;
885
886 return 0;
887
888 err_create:
889 if (qp->create_type == MLX5_QP_USER)
890 destroy_qp_user(pd, qp);
891 else if (qp->create_type == MLX5_QP_KERNEL)
892 destroy_qp_kernel(dev, qp);
893
894 mlx5_vfree(in);
895 return err;
896 }
897
898 static void mlx5_ib_lock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq)
899 __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
900 {
901 if (send_cq) {
902 if (recv_cq) {
903 if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
904 spin_lock_irq(&send_cq->lock);
905 spin_lock_nested(&recv_cq->lock,
906 SINGLE_DEPTH_NESTING);
907 } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) {
908 spin_lock_irq(&send_cq->lock);
909 __acquire(&recv_cq->lock);
910 } else {
911 spin_lock_irq(&recv_cq->lock);
912 spin_lock_nested(&send_cq->lock,
913 SINGLE_DEPTH_NESTING);
914 }
915 } else {
916 spin_lock_irq(&send_cq->lock);
917 }
918 } else if (recv_cq) {
919 spin_lock_irq(&recv_cq->lock);
920 }
921 }
922
923 static void mlx5_ib_unlock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq)
924 __releases(&send_cq->lock) __releases(&recv_cq->lock)
925 {
926 if (send_cq) {
927 if (recv_cq) {
928 if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
929 spin_unlock(&recv_cq->lock);
930 spin_unlock_irq(&send_cq->lock);
931 } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) {
932 __release(&recv_cq->lock);
933 spin_unlock_irq(&send_cq->lock);
934 } else {
935 spin_unlock(&send_cq->lock);
936 spin_unlock_irq(&recv_cq->lock);
937 }
938 } else {
939 spin_unlock_irq(&send_cq->lock);
940 }
941 } else if (recv_cq) {
942 spin_unlock_irq(&recv_cq->lock);
943 }
944 }
945
946 static struct mlx5_ib_pd *get_pd(struct mlx5_ib_qp *qp)
947 {
948 return to_mpd(qp->ibqp.pd);
949 }
950
951 static void get_cqs(struct mlx5_ib_qp *qp,
952 struct mlx5_ib_cq **send_cq, struct mlx5_ib_cq **recv_cq)
953 {
954 switch (qp->ibqp.qp_type) {
955 case IB_QPT_XRC_TGT:
956 *send_cq = NULL;
957 *recv_cq = NULL;
958 break;
959 case MLX5_IB_QPT_REG_UMR:
960 case IB_QPT_XRC_INI:
961 *send_cq = to_mcq(qp->ibqp.send_cq);
962 *recv_cq = NULL;
963 break;
964
965 case IB_QPT_SMI:
966 case IB_QPT_GSI:
967 case IB_QPT_RC:
968 case IB_QPT_UC:
969 case IB_QPT_UD:
970 case IB_QPT_RAW_IPV6:
971 case IB_QPT_RAW_ETHERTYPE:
972 *send_cq = to_mcq(qp->ibqp.send_cq);
973 *recv_cq = to_mcq(qp->ibqp.recv_cq);
974 break;
975
976 case IB_QPT_RAW_PACKET:
977 case IB_QPT_MAX:
978 default:
979 *send_cq = NULL;
980 *recv_cq = NULL;
981 break;
982 }
983 }
984
985 static void destroy_qp_common(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp)
986 {
987 struct mlx5_ib_cq *send_cq, *recv_cq;
988 struct mlx5_modify_qp_mbox_in *in;
989 int err;
990
991 in = kzalloc(sizeof(*in), GFP_KERNEL);
992 if (!in)
993 return;
994 if (qp->state != IB_QPS_RESET)
995 if (mlx5_core_qp_modify(&dev->mdev, to_mlx5_state(qp->state),
996 MLX5_QP_STATE_RST, in, sizeof(*in), &qp->mqp))
997 mlx5_ib_warn(dev, "mlx5_ib: modify QP %06x to RESET failed\n",
998 qp->mqp.qpn);
999
1000 get_cqs(qp, &send_cq, &recv_cq);
1001
1002 if (qp->create_type == MLX5_QP_KERNEL) {
1003 mlx5_ib_lock_cqs(send_cq, recv_cq);
1004 __mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn,
1005 qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL);
1006 if (send_cq != recv_cq)
1007 __mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1008 mlx5_ib_unlock_cqs(send_cq, recv_cq);
1009 }
1010
1011 err = mlx5_core_destroy_qp(&dev->mdev, &qp->mqp);
1012 if (err)
1013 mlx5_ib_warn(dev, "failed to destroy QP 0x%x\n", qp->mqp.qpn);
1014 kfree(in);
1015
1016
1017 if (qp->create_type == MLX5_QP_KERNEL)
1018 destroy_qp_kernel(dev, qp);
1019 else if (qp->create_type == MLX5_QP_USER)
1020 destroy_qp_user(&get_pd(qp)->ibpd, qp);
1021 }
1022
1023 static const char *ib_qp_type_str(enum ib_qp_type type)
1024 {
1025 switch (type) {
1026 case IB_QPT_SMI:
1027 return "IB_QPT_SMI";
1028 case IB_QPT_GSI:
1029 return "IB_QPT_GSI";
1030 case IB_QPT_RC:
1031 return "IB_QPT_RC";
1032 case IB_QPT_UC:
1033 return "IB_QPT_UC";
1034 case IB_QPT_UD:
1035 return "IB_QPT_UD";
1036 case IB_QPT_RAW_IPV6:
1037 return "IB_QPT_RAW_IPV6";
1038 case IB_QPT_RAW_ETHERTYPE:
1039 return "IB_QPT_RAW_ETHERTYPE";
1040 case IB_QPT_XRC_INI:
1041 return "IB_QPT_XRC_INI";
1042 case IB_QPT_XRC_TGT:
1043 return "IB_QPT_XRC_TGT";
1044 case IB_QPT_RAW_PACKET:
1045 return "IB_QPT_RAW_PACKET";
1046 case MLX5_IB_QPT_REG_UMR:
1047 return "MLX5_IB_QPT_REG_UMR";
1048 case IB_QPT_MAX:
1049 default:
1050 return "Invalid QP type";
1051 }
1052 }
1053
1054 struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd,
1055 struct ib_qp_init_attr *init_attr,
1056 struct ib_udata *udata)
1057 {
1058 struct mlx5_ib_dev *dev;
1059 struct mlx5_ib_qp *qp;
1060 u16 xrcdn = 0;
1061 int err;
1062
1063 if (pd) {
1064 dev = to_mdev(pd->device);
1065 } else {
1066 /* being cautious here */
1067 if (init_attr->qp_type != IB_QPT_XRC_TGT &&
1068 init_attr->qp_type != MLX5_IB_QPT_REG_UMR) {
1069 pr_warn("%s: no PD for transport %s\n", __func__,
1070 ib_qp_type_str(init_attr->qp_type));
1071 return ERR_PTR(-EINVAL);
1072 }
1073 dev = to_mdev(to_mxrcd(init_attr->xrcd)->ibxrcd.device);
1074 }
1075
1076 switch (init_attr->qp_type) {
1077 case IB_QPT_XRC_TGT:
1078 case IB_QPT_XRC_INI:
1079 if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_XRC)) {
1080 mlx5_ib_dbg(dev, "XRC not supported\n");
1081 return ERR_PTR(-ENOSYS);
1082 }
1083 init_attr->recv_cq = NULL;
1084 if (init_attr->qp_type == IB_QPT_XRC_TGT) {
1085 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1086 init_attr->send_cq = NULL;
1087 }
1088
1089 /* fall through */
1090 case IB_QPT_RC:
1091 case IB_QPT_UC:
1092 case IB_QPT_UD:
1093 case IB_QPT_SMI:
1094 case IB_QPT_GSI:
1095 case MLX5_IB_QPT_REG_UMR:
1096 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
1097 if (!qp)
1098 return ERR_PTR(-ENOMEM);
1099
1100 err = create_qp_common(dev, pd, init_attr, udata, qp);
1101 if (err) {
1102 mlx5_ib_dbg(dev, "create_qp_common failed\n");
1103 kfree(qp);
1104 return ERR_PTR(err);
1105 }
1106
1107 if (is_qp0(init_attr->qp_type))
1108 qp->ibqp.qp_num = 0;
1109 else if (is_qp1(init_attr->qp_type))
1110 qp->ibqp.qp_num = 1;
1111 else
1112 qp->ibqp.qp_num = qp->mqp.qpn;
1113
1114 mlx5_ib_dbg(dev, "ib qpnum 0x%x, mlx qpn 0x%x, rcqn 0x%x, scqn 0x%x\n",
1115 qp->ibqp.qp_num, qp->mqp.qpn, to_mcq(init_attr->recv_cq)->mcq.cqn,
1116 to_mcq(init_attr->send_cq)->mcq.cqn);
1117
1118 qp->xrcdn = xrcdn;
1119
1120 break;
1121
1122 case IB_QPT_RAW_IPV6:
1123 case IB_QPT_RAW_ETHERTYPE:
1124 case IB_QPT_RAW_PACKET:
1125 case IB_QPT_MAX:
1126 default:
1127 mlx5_ib_dbg(dev, "unsupported qp type %d\n",
1128 init_attr->qp_type);
1129 /* Don't support raw QPs */
1130 return ERR_PTR(-EINVAL);
1131 }
1132
1133 return &qp->ibqp;
1134 }
1135
1136 int mlx5_ib_destroy_qp(struct ib_qp *qp)
1137 {
1138 struct mlx5_ib_dev *dev = to_mdev(qp->device);
1139 struct mlx5_ib_qp *mqp = to_mqp(qp);
1140
1141 destroy_qp_common(dev, mqp);
1142
1143 kfree(mqp);
1144
1145 return 0;
1146 }
1147
1148 static __be32 to_mlx5_access_flags(struct mlx5_ib_qp *qp, const struct ib_qp_attr *attr,
1149 int attr_mask)
1150 {
1151 u32 hw_access_flags = 0;
1152 u8 dest_rd_atomic;
1153 u32 access_flags;
1154
1155 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1156 dest_rd_atomic = attr->max_dest_rd_atomic;
1157 else
1158 dest_rd_atomic = qp->resp_depth;
1159
1160 if (attr_mask & IB_QP_ACCESS_FLAGS)
1161 access_flags = attr->qp_access_flags;
1162 else
1163 access_flags = qp->atomic_rd_en;
1164
1165 if (!dest_rd_atomic)
1166 access_flags &= IB_ACCESS_REMOTE_WRITE;
1167
1168 if (access_flags & IB_ACCESS_REMOTE_READ)
1169 hw_access_flags |= MLX5_QP_BIT_RRE;
1170 if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1171 hw_access_flags |= (MLX5_QP_BIT_RAE | MLX5_ATOMIC_MODE_CX);
1172 if (access_flags & IB_ACCESS_REMOTE_WRITE)
1173 hw_access_flags |= MLX5_QP_BIT_RWE;
1174
1175 return cpu_to_be32(hw_access_flags);
1176 }
1177
1178 enum {
1179 MLX5_PATH_FLAG_FL = 1 << 0,
1180 MLX5_PATH_FLAG_FREE_AR = 1 << 1,
1181 MLX5_PATH_FLAG_COUNTER = 1 << 2,
1182 };
1183
1184 static int ib_rate_to_mlx5(struct mlx5_ib_dev *dev, u8 rate)
1185 {
1186 if (rate == IB_RATE_PORT_CURRENT) {
1187 return 0;
1188 } else if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_300_GBPS) {
1189 return -EINVAL;
1190 } else {
1191 while (rate != IB_RATE_2_5_GBPS &&
1192 !(1 << (rate + MLX5_STAT_RATE_OFFSET) &
1193 dev->mdev.caps.stat_rate_support))
1194 --rate;
1195 }
1196
1197 return rate + MLX5_STAT_RATE_OFFSET;
1198 }
1199
1200 static int mlx5_set_path(struct mlx5_ib_dev *dev, const struct ib_ah_attr *ah,
1201 struct mlx5_qp_path *path, u8 port, int attr_mask,
1202 u32 path_flags, const struct ib_qp_attr *attr)
1203 {
1204 int err;
1205
1206 path->fl = (path_flags & MLX5_PATH_FLAG_FL) ? 0x80 : 0;
1207 path->free_ar = (path_flags & MLX5_PATH_FLAG_FREE_AR) ? 0x80 : 0;
1208
1209 if (attr_mask & IB_QP_PKEY_INDEX)
1210 path->pkey_index = attr->pkey_index;
1211
1212 path->grh_mlid = ah->src_path_bits & 0x7f;
1213 path->rlid = cpu_to_be16(ah->dlid);
1214
1215 if (ah->ah_flags & IB_AH_GRH) {
1216 path->grh_mlid |= 1 << 7;
1217 path->mgid_index = ah->grh.sgid_index;
1218 path->hop_limit = ah->grh.hop_limit;
1219 path->tclass_flowlabel =
1220 cpu_to_be32((ah->grh.traffic_class << 20) |
1221 (ah->grh.flow_label));
1222 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1223 }
1224
1225 err = ib_rate_to_mlx5(dev, ah->static_rate);
1226 if (err < 0)
1227 return err;
1228 path->static_rate = err;
1229 path->port = port;
1230
1231 if (ah->ah_flags & IB_AH_GRH) {
1232 if (ah->grh.sgid_index >= dev->mdev.caps.port[port - 1].gid_table_len) {
1233 pr_err(KERN_ERR "sgid_index (%u) too large. max is %d\n",
1234 ah->grh.sgid_index, dev->mdev.caps.port[port - 1].gid_table_len);
1235 return -EINVAL;
1236 }
1237
1238 path->grh_mlid |= 1 << 7;
1239 path->mgid_index = ah->grh.sgid_index;
1240 path->hop_limit = ah->grh.hop_limit;
1241 path->tclass_flowlabel =
1242 cpu_to_be32((ah->grh.traffic_class << 20) |
1243 (ah->grh.flow_label));
1244 memcpy(path->rgid, ah->grh.dgid.raw, 16);
1245 }
1246
1247 if (attr_mask & IB_QP_TIMEOUT)
1248 path->ackto_lt = attr->timeout << 3;
1249
1250 path->sl = ah->sl & 0xf;
1251
1252 return 0;
1253 }
1254
1255 static enum mlx5_qp_optpar opt_mask[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE][MLX5_QP_ST_MAX] = {
1256 [MLX5_QP_STATE_INIT] = {
1257 [MLX5_QP_STATE_INIT] = {
1258 [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE |
1259 MLX5_QP_OPTPAR_RAE |
1260 MLX5_QP_OPTPAR_RWE |
1261 MLX5_QP_OPTPAR_PKEY_INDEX |
1262 MLX5_QP_OPTPAR_PRI_PORT,
1263 [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE |
1264 MLX5_QP_OPTPAR_PKEY_INDEX |
1265 MLX5_QP_OPTPAR_PRI_PORT,
1266 [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX |
1267 MLX5_QP_OPTPAR_Q_KEY |
1268 MLX5_QP_OPTPAR_PRI_PORT,
1269 },
1270 [MLX5_QP_STATE_RTR] = {
1271 [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH |
1272 MLX5_QP_OPTPAR_RRE |
1273 MLX5_QP_OPTPAR_RAE |
1274 MLX5_QP_OPTPAR_RWE |
1275 MLX5_QP_OPTPAR_PKEY_INDEX,
1276 [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH |
1277 MLX5_QP_OPTPAR_RWE |
1278 MLX5_QP_OPTPAR_PKEY_INDEX,
1279 [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX |
1280 MLX5_QP_OPTPAR_Q_KEY,
1281 [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_PKEY_INDEX |
1282 MLX5_QP_OPTPAR_Q_KEY,
1283 },
1284 },
1285 [MLX5_QP_STATE_RTR] = {
1286 [MLX5_QP_STATE_RTS] = {
1287 [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH |
1288 MLX5_QP_OPTPAR_RRE |
1289 MLX5_QP_OPTPAR_RAE |
1290 MLX5_QP_OPTPAR_RWE |
1291 MLX5_QP_OPTPAR_PM_STATE |
1292 MLX5_QP_OPTPAR_RNR_TIMEOUT,
1293 [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH |
1294 MLX5_QP_OPTPAR_RWE |
1295 MLX5_QP_OPTPAR_PM_STATE,
1296 [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY,
1297 },
1298 },
1299 [MLX5_QP_STATE_RTS] = {
1300 [MLX5_QP_STATE_RTS] = {
1301 [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE |
1302 MLX5_QP_OPTPAR_RAE |
1303 MLX5_QP_OPTPAR_RWE |
1304 MLX5_QP_OPTPAR_RNR_TIMEOUT |
1305 MLX5_QP_OPTPAR_PM_STATE,
1306 [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE |
1307 MLX5_QP_OPTPAR_PM_STATE,
1308 [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY |
1309 MLX5_QP_OPTPAR_SRQN |
1310 MLX5_QP_OPTPAR_CQN_RCV,
1311 },
1312 },
1313 [MLX5_QP_STATE_SQER] = {
1314 [MLX5_QP_STATE_RTS] = {
1315 [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY,
1316 [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_Q_KEY,
1317 },
1318 },
1319 };
1320
1321 static int ib_nr_to_mlx5_nr(int ib_mask)
1322 {
1323 switch (ib_mask) {
1324 case IB_QP_STATE:
1325 return 0;
1326 case IB_QP_CUR_STATE:
1327 return 0;
1328 case IB_QP_EN_SQD_ASYNC_NOTIFY:
1329 return 0;
1330 case IB_QP_ACCESS_FLAGS:
1331 return MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_RRE |
1332 MLX5_QP_OPTPAR_RAE;
1333 case IB_QP_PKEY_INDEX:
1334 return MLX5_QP_OPTPAR_PKEY_INDEX;
1335 case IB_QP_PORT:
1336 return MLX5_QP_OPTPAR_PRI_PORT;
1337 case IB_QP_QKEY:
1338 return MLX5_QP_OPTPAR_Q_KEY;
1339 case IB_QP_AV:
1340 return MLX5_QP_OPTPAR_PRIMARY_ADDR_PATH |
1341 MLX5_QP_OPTPAR_PRI_PORT;
1342 case IB_QP_PATH_MTU:
1343 return 0;
1344 case IB_QP_TIMEOUT:
1345 return MLX5_QP_OPTPAR_ACK_TIMEOUT;
1346 case IB_QP_RETRY_CNT:
1347 return MLX5_QP_OPTPAR_RETRY_COUNT;
1348 case IB_QP_RNR_RETRY:
1349 return MLX5_QP_OPTPAR_RNR_RETRY;
1350 case IB_QP_RQ_PSN:
1351 return 0;
1352 case IB_QP_MAX_QP_RD_ATOMIC:
1353 return MLX5_QP_OPTPAR_SRA_MAX;
1354 case IB_QP_ALT_PATH:
1355 return MLX5_QP_OPTPAR_ALT_ADDR_PATH;
1356 case IB_QP_MIN_RNR_TIMER:
1357 return MLX5_QP_OPTPAR_RNR_TIMEOUT;
1358 case IB_QP_SQ_PSN:
1359 return 0;
1360 case IB_QP_MAX_DEST_RD_ATOMIC:
1361 return MLX5_QP_OPTPAR_RRA_MAX | MLX5_QP_OPTPAR_RWE |
1362 MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE;
1363 case IB_QP_PATH_MIG_STATE:
1364 return MLX5_QP_OPTPAR_PM_STATE;
1365 case IB_QP_CAP:
1366 return 0;
1367 case IB_QP_DEST_QPN:
1368 return 0;
1369 }
1370 return 0;
1371 }
1372
1373 static int ib_mask_to_mlx5_opt(int ib_mask)
1374 {
1375 int result = 0;
1376 int i;
1377
1378 for (i = 0; i < 8 * sizeof(int); i++) {
1379 if ((1 << i) & ib_mask)
1380 result |= ib_nr_to_mlx5_nr(1 << i);
1381 }
1382
1383 return result;
1384 }
1385
1386 static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
1387 const struct ib_qp_attr *attr, int attr_mask,
1388 enum ib_qp_state cur_state, enum ib_qp_state new_state)
1389 {
1390 struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
1391 struct mlx5_ib_qp *qp = to_mqp(ibqp);
1392 struct mlx5_ib_cq *send_cq, *recv_cq;
1393 struct mlx5_qp_context *context;
1394 struct mlx5_modify_qp_mbox_in *in;
1395 struct mlx5_ib_pd *pd;
1396 enum mlx5_qp_state mlx5_cur, mlx5_new;
1397 enum mlx5_qp_optpar optpar;
1398 int sqd_event;
1399 int mlx5_st;
1400 int err;
1401
1402 in = kzalloc(sizeof(*in), GFP_KERNEL);
1403 if (!in)
1404 return -ENOMEM;
1405
1406 context = &in->ctx;
1407 err = to_mlx5_st(ibqp->qp_type);
1408 if (err < 0)
1409 goto out;
1410
1411 context->flags = cpu_to_be32(err << 16);
1412
1413 if (!(attr_mask & IB_QP_PATH_MIG_STATE)) {
1414 context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
1415 } else {
1416 switch (attr->path_mig_state) {
1417 case IB_MIG_MIGRATED:
1418 context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
1419 break;
1420 case IB_MIG_REARM:
1421 context->flags |= cpu_to_be32(MLX5_QP_PM_REARM << 11);
1422 break;
1423 case IB_MIG_ARMED:
1424 context->flags |= cpu_to_be32(MLX5_QP_PM_ARMED << 11);
1425 break;
1426 }
1427 }
1428
1429 if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) {
1430 context->mtu_msgmax = (IB_MTU_256 << 5) | 8;
1431 } else if (ibqp->qp_type == IB_QPT_UD ||
1432 ibqp->qp_type == MLX5_IB_QPT_REG_UMR) {
1433 context->mtu_msgmax = (IB_MTU_4096 << 5) | 12;
1434 } else if (attr_mask & IB_QP_PATH_MTU) {
1435 if (attr->path_mtu < IB_MTU_256 ||
1436 attr->path_mtu > IB_MTU_4096) {
1437 mlx5_ib_warn(dev, "invalid mtu %d\n", attr->path_mtu);
1438 err = -EINVAL;
1439 goto out;
1440 }
1441 context->mtu_msgmax = (attr->path_mtu << 5) | dev->mdev.caps.log_max_msg;
1442 }
1443
1444 if (attr_mask & IB_QP_DEST_QPN)
1445 context->log_pg_sz_remote_qpn = cpu_to_be32(attr->dest_qp_num);
1446
1447 if (attr_mask & IB_QP_PKEY_INDEX)
1448 context->pri_path.pkey_index = attr->pkey_index;
1449
1450 /* todo implement counter_index functionality */
1451
1452 if (is_sqp(ibqp->qp_type))
1453 context->pri_path.port = qp->port;
1454
1455 if (attr_mask & IB_QP_PORT)
1456 context->pri_path.port = attr->port_num;
1457
1458 if (attr_mask & IB_QP_AV) {
1459 err = mlx5_set_path(dev, &attr->ah_attr, &context->pri_path,
1460 attr_mask & IB_QP_PORT ? attr->port_num : qp->port,
1461 attr_mask, 0, attr);
1462 if (err)
1463 goto out;
1464 }
1465
1466 if (attr_mask & IB_QP_TIMEOUT)
1467 context->pri_path.ackto_lt |= attr->timeout << 3;
1468
1469 if (attr_mask & IB_QP_ALT_PATH) {
1470 err = mlx5_set_path(dev, &attr->alt_ah_attr, &context->alt_path,
1471 attr->alt_port_num, attr_mask, 0, attr);
1472 if (err)
1473 goto out;
1474 }
1475
1476 pd = get_pd(qp);
1477 get_cqs(qp, &send_cq, &recv_cq);
1478
1479 context->flags_pd = cpu_to_be32(pd ? pd->pdn : to_mpd(dev->devr.p0)->pdn);
1480 context->cqn_send = send_cq ? cpu_to_be32(send_cq->mcq.cqn) : 0;
1481 context->cqn_recv = recv_cq ? cpu_to_be32(recv_cq->mcq.cqn) : 0;
1482 context->params1 = cpu_to_be32(MLX5_IB_ACK_REQ_FREQ << 28);
1483
1484 if (attr_mask & IB_QP_RNR_RETRY)
1485 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
1486
1487 if (attr_mask & IB_QP_RETRY_CNT)
1488 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
1489
1490 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1491 if (attr->max_rd_atomic)
1492 context->params1 |=
1493 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
1494 }
1495
1496 if (attr_mask & IB_QP_SQ_PSN)
1497 context->next_send_psn = cpu_to_be32(attr->sq_psn);
1498
1499 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1500 if (attr->max_dest_rd_atomic)
1501 context->params2 |=
1502 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
1503 }
1504
1505 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC))
1506 context->params2 |= to_mlx5_access_flags(qp, attr, attr_mask);
1507
1508 if (attr_mask & IB_QP_MIN_RNR_TIMER)
1509 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
1510
1511 if (attr_mask & IB_QP_RQ_PSN)
1512 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
1513
1514 if (attr_mask & IB_QP_QKEY)
1515 context->qkey = cpu_to_be32(attr->qkey);
1516
1517 if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1518 context->db_rec_addr = cpu_to_be64(qp->db.dma);
1519
1520 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
1521 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
1522 sqd_event = 1;
1523 else
1524 sqd_event = 0;
1525
1526 if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
1527 context->sq_crq_size |= cpu_to_be16(1 << 4);
1528
1529
1530 mlx5_cur = to_mlx5_state(cur_state);
1531 mlx5_new = to_mlx5_state(new_state);
1532 mlx5_st = to_mlx5_st(ibqp->qp_type);
1533 if (mlx5_cur < 0 || mlx5_new < 0 || mlx5_st < 0)
1534 goto out;
1535
1536 optpar = ib_mask_to_mlx5_opt(attr_mask);
1537 optpar &= opt_mask[mlx5_cur][mlx5_new][mlx5_st];
1538 in->optparam = cpu_to_be32(optpar);
1539 err = mlx5_core_qp_modify(&dev->mdev, to_mlx5_state(cur_state),
1540 to_mlx5_state(new_state), in, sqd_event,
1541 &qp->mqp);
1542 if (err)
1543 goto out;
1544
1545 qp->state = new_state;
1546
1547 if (attr_mask & IB_QP_ACCESS_FLAGS)
1548 qp->atomic_rd_en = attr->qp_access_flags;
1549 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1550 qp->resp_depth = attr->max_dest_rd_atomic;
1551 if (attr_mask & IB_QP_PORT)
1552 qp->port = attr->port_num;
1553 if (attr_mask & IB_QP_ALT_PATH)
1554 qp->alt_port = attr->alt_port_num;
1555
1556 /*
1557 * If we moved a kernel QP to RESET, clean up all old CQ
1558 * entries and reinitialize the QP.
1559 */
1560 if (new_state == IB_QPS_RESET && !ibqp->uobject) {
1561 mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn,
1562 ibqp->srq ? to_msrq(ibqp->srq) : NULL);
1563 if (send_cq != recv_cq)
1564 mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1565
1566 qp->rq.head = 0;
1567 qp->rq.tail = 0;
1568 qp->sq.head = 0;
1569 qp->sq.tail = 0;
1570 qp->sq.cur_post = 0;
1571 qp->sq.last_poll = 0;
1572 qp->db.db[MLX5_RCV_DBR] = 0;
1573 qp->db.db[MLX5_SND_DBR] = 0;
1574 }
1575
1576 out:
1577 kfree(in);
1578 return err;
1579 }
1580
1581 int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
1582 int attr_mask, struct ib_udata *udata)
1583 {
1584 struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
1585 struct mlx5_ib_qp *qp = to_mqp(ibqp);
1586 enum ib_qp_state cur_state, new_state;
1587 int err = -EINVAL;
1588 int port;
1589
1590 mutex_lock(&qp->mutex);
1591
1592 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
1593 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
1594
1595 if (ibqp->qp_type != MLX5_IB_QPT_REG_UMR &&
1596 !ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask))
1597 goto out;
1598
1599 if ((attr_mask & IB_QP_PORT) &&
1600 (attr->port_num == 0 || attr->port_num > dev->mdev.caps.num_ports))
1601 goto out;
1602
1603 if (attr_mask & IB_QP_PKEY_INDEX) {
1604 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1605 if (attr->pkey_index >= dev->mdev.caps.port[port - 1].pkey_table_len)
1606 goto out;
1607 }
1608
1609 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
1610 attr->max_rd_atomic > dev->mdev.caps.max_ra_res_qp)
1611 goto out;
1612
1613 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
1614 attr->max_dest_rd_atomic > dev->mdev.caps.max_ra_req_qp)
1615 goto out;
1616
1617 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
1618 err = 0;
1619 goto out;
1620 }
1621
1622 err = __mlx5_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state);
1623
1624 out:
1625 mutex_unlock(&qp->mutex);
1626 return err;
1627 }
1628
1629 static int mlx5_wq_overflow(struct mlx5_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
1630 {
1631 struct mlx5_ib_cq *cq;
1632 unsigned cur;
1633
1634 cur = wq->head - wq->tail;
1635 if (likely(cur + nreq < wq->max_post))
1636 return 0;
1637
1638 cq = to_mcq(ib_cq);
1639 spin_lock(&cq->lock);
1640 cur = wq->head - wq->tail;
1641 spin_unlock(&cq->lock);
1642
1643 return cur + nreq >= wq->max_post;
1644 }
1645
1646 static __always_inline void set_raddr_seg(struct mlx5_wqe_raddr_seg *rseg,
1647 u64 remote_addr, u32 rkey)
1648 {
1649 rseg->raddr = cpu_to_be64(remote_addr);
1650 rseg->rkey = cpu_to_be32(rkey);
1651 rseg->reserved = 0;
1652 }
1653
1654 static void set_atomic_seg(struct mlx5_wqe_atomic_seg *aseg, struct ib_send_wr *wr)
1655 {
1656 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
1657 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
1658 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
1659 } else if (wr->opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
1660 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
1661 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add_mask);
1662 } else {
1663 aseg->swap_add = cpu_to_be64(wr->wr.atomic.compare_add);
1664 aseg->compare = 0;
1665 }
1666 }
1667
1668 static void set_masked_atomic_seg(struct mlx5_wqe_masked_atomic_seg *aseg,
1669 struct ib_send_wr *wr)
1670 {
1671 aseg->swap_add = cpu_to_be64(wr->wr.atomic.swap);
1672 aseg->swap_add_mask = cpu_to_be64(wr->wr.atomic.swap_mask);
1673 aseg->compare = cpu_to_be64(wr->wr.atomic.compare_add);
1674 aseg->compare_mask = cpu_to_be64(wr->wr.atomic.compare_add_mask);
1675 }
1676
1677 static void set_datagram_seg(struct mlx5_wqe_datagram_seg *dseg,
1678 struct ib_send_wr *wr)
1679 {
1680 memcpy(&dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof(struct mlx5_av));
1681 dseg->av.dqp_dct = cpu_to_be32(wr->wr.ud.remote_qpn | MLX5_EXTENDED_UD_AV);
1682 dseg->av.key.qkey.qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
1683 }
1684
1685 static void set_data_ptr_seg(struct mlx5_wqe_data_seg *dseg, struct ib_sge *sg)
1686 {
1687 dseg->byte_count = cpu_to_be32(sg->length);
1688 dseg->lkey = cpu_to_be32(sg->lkey);
1689 dseg->addr = cpu_to_be64(sg->addr);
1690 }
1691
1692 static __be16 get_klm_octo(int npages)
1693 {
1694 return cpu_to_be16(ALIGN(npages, 8) / 2);
1695 }
1696
1697 static __be64 frwr_mkey_mask(void)
1698 {
1699 u64 result;
1700
1701 result = MLX5_MKEY_MASK_LEN |
1702 MLX5_MKEY_MASK_PAGE_SIZE |
1703 MLX5_MKEY_MASK_START_ADDR |
1704 MLX5_MKEY_MASK_EN_RINVAL |
1705 MLX5_MKEY_MASK_KEY |
1706 MLX5_MKEY_MASK_LR |
1707 MLX5_MKEY_MASK_LW |
1708 MLX5_MKEY_MASK_RR |
1709 MLX5_MKEY_MASK_RW |
1710 MLX5_MKEY_MASK_A |
1711 MLX5_MKEY_MASK_SMALL_FENCE |
1712 MLX5_MKEY_MASK_FREE;
1713
1714 return cpu_to_be64(result);
1715 }
1716
1717 static void set_frwr_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr,
1718 struct ib_send_wr *wr, int li)
1719 {
1720 memset(umr, 0, sizeof(*umr));
1721
1722 if (li) {
1723 umr->mkey_mask = cpu_to_be64(MLX5_MKEY_MASK_FREE);
1724 umr->flags = 1 << 7;
1725 return;
1726 }
1727
1728 umr->flags = (1 << 5); /* fail if not free */
1729 umr->klm_octowords = get_klm_octo(wr->wr.fast_reg.page_list_len);
1730 umr->mkey_mask = frwr_mkey_mask();
1731 }
1732
1733 static void set_reg_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr,
1734 struct ib_send_wr *wr)
1735 {
1736 struct umr_wr *umrwr = (struct umr_wr *)&wr->wr.fast_reg;
1737 u64 mask;
1738
1739 memset(umr, 0, sizeof(*umr));
1740
1741 if (!(wr->send_flags & MLX5_IB_SEND_UMR_UNREG)) {
1742 umr->flags = 1 << 5; /* fail if not free */
1743 umr->klm_octowords = get_klm_octo(umrwr->npages);
1744 mask = MLX5_MKEY_MASK_LEN |
1745 MLX5_MKEY_MASK_PAGE_SIZE |
1746 MLX5_MKEY_MASK_START_ADDR |
1747 MLX5_MKEY_MASK_PD |
1748 MLX5_MKEY_MASK_LR |
1749 MLX5_MKEY_MASK_LW |
1750 MLX5_MKEY_MASK_RR |
1751 MLX5_MKEY_MASK_RW |
1752 MLX5_MKEY_MASK_A |
1753 MLX5_MKEY_MASK_FREE;
1754 umr->mkey_mask = cpu_to_be64(mask);
1755 } else {
1756 umr->flags = 2 << 5; /* fail if free */
1757 mask = MLX5_MKEY_MASK_FREE;
1758 umr->mkey_mask = cpu_to_be64(mask);
1759 }
1760
1761 if (!wr->num_sge)
1762 umr->flags |= (1 << 7); /* inline */
1763 }
1764
1765 static u8 get_umr_flags(int acc)
1766 {
1767 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX5_PERM_ATOMIC : 0) |
1768 (acc & IB_ACCESS_REMOTE_WRITE ? MLX5_PERM_REMOTE_WRITE : 0) |
1769 (acc & IB_ACCESS_REMOTE_READ ? MLX5_PERM_REMOTE_READ : 0) |
1770 (acc & IB_ACCESS_LOCAL_WRITE ? MLX5_PERM_LOCAL_WRITE : 0) |
1771 MLX5_PERM_LOCAL_READ | MLX5_PERM_UMR_EN | MLX5_ACCESS_MODE_MTT;
1772 }
1773
1774 static void set_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr,
1775 int li, int *writ)
1776 {
1777 memset(seg, 0, sizeof(*seg));
1778 if (li) {
1779 seg->status = 1 << 6;
1780 return;
1781 }
1782
1783 seg->flags = get_umr_flags(wr->wr.fast_reg.access_flags);
1784 *writ = seg->flags & (MLX5_PERM_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE);
1785 seg->qpn_mkey7_0 = cpu_to_be32((wr->wr.fast_reg.rkey & 0xff) | 0xffffff00);
1786 seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL);
1787 seg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
1788 seg->len = cpu_to_be64(wr->wr.fast_reg.length);
1789 seg->xlt_oct_size = cpu_to_be32((wr->wr.fast_reg.page_list_len + 1) / 2);
1790 seg->log2_page_size = wr->wr.fast_reg.page_shift;
1791 }
1792
1793 static void set_reg_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr)
1794 {
1795 memset(seg, 0, sizeof(*seg));
1796 if (wr->send_flags & MLX5_IB_SEND_UMR_UNREG) {
1797 seg->status = 1 << 6;
1798 return;
1799 }
1800
1801 seg->flags = convert_access(wr->wr.fast_reg.access_flags);
1802 seg->flags_pd = cpu_to_be32(to_mpd((struct ib_pd *)wr->wr.fast_reg.page_list)->pdn);
1803 seg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start);
1804 seg->len = cpu_to_be64(wr->wr.fast_reg.length);
1805 seg->log2_page_size = wr->wr.fast_reg.page_shift;
1806 seg->qpn_mkey7_0 = cpu_to_be32(0xffffff << 8);
1807 }
1808
1809 static void set_frwr_pages(struct mlx5_wqe_data_seg *dseg,
1810 struct ib_send_wr *wr,
1811 struct mlx5_core_dev *mdev,
1812 struct mlx5_ib_pd *pd,
1813 int writ)
1814 {
1815 struct mlx5_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list);
1816 u64 *page_list = wr->wr.fast_reg.page_list->page_list;
1817 u64 perm = MLX5_EN_RD | (writ ? MLX5_EN_WR : 0);
1818 int i;
1819
1820 for (i = 0; i < wr->wr.fast_reg.page_list_len; i++)
1821 mfrpl->mapped_page_list[i] = cpu_to_be64(page_list[i] | perm);
1822 dseg->addr = cpu_to_be64(mfrpl->map);
1823 dseg->byte_count = cpu_to_be32(ALIGN(sizeof(u64) * wr->wr.fast_reg.page_list_len, 64));
1824 dseg->lkey = cpu_to_be32(pd->pa_lkey);
1825 }
1826
1827 static __be32 send_ieth(struct ib_send_wr *wr)
1828 {
1829 switch (wr->opcode) {
1830 case IB_WR_SEND_WITH_IMM:
1831 case IB_WR_RDMA_WRITE_WITH_IMM:
1832 return wr->ex.imm_data;
1833
1834 case IB_WR_SEND_WITH_INV:
1835 return cpu_to_be32(wr->ex.invalidate_rkey);
1836
1837 default:
1838 return 0;
1839 }
1840 }
1841
1842 static u8 calc_sig(void *wqe, int size)
1843 {
1844 u8 *p = wqe;
1845 u8 res = 0;
1846 int i;
1847
1848 for (i = 0; i < size; i++)
1849 res ^= p[i];
1850
1851 return ~res;
1852 }
1853
1854 static u8 wq_sig(void *wqe)
1855 {
1856 return calc_sig(wqe, (*((u8 *)wqe + 8) & 0x3f) << 4);
1857 }
1858
1859 static int set_data_inl_seg(struct mlx5_ib_qp *qp, struct ib_send_wr *wr,
1860 void *wqe, int *sz)
1861 {
1862 struct mlx5_wqe_inline_seg *seg;
1863 void *qend = qp->sq.qend;
1864 void *addr;
1865 int inl = 0;
1866 int copy;
1867 int len;
1868 int i;
1869
1870 seg = wqe;
1871 wqe += sizeof(*seg);
1872 for (i = 0; i < wr->num_sge; i++) {
1873 addr = (void *)(unsigned long)(wr->sg_list[i].addr);
1874 len = wr->sg_list[i].length;
1875 inl += len;
1876
1877 if (unlikely(inl > qp->max_inline_data))
1878 return -ENOMEM;
1879
1880 if (unlikely(wqe + len > qend)) {
1881 copy = qend - wqe;
1882 memcpy(wqe, addr, copy);
1883 addr += copy;
1884 len -= copy;
1885 wqe = mlx5_get_send_wqe(qp, 0);
1886 }
1887 memcpy(wqe, addr, len);
1888 wqe += len;
1889 }
1890
1891 seg->byte_count = cpu_to_be32(inl | MLX5_INLINE_SEG);
1892
1893 *sz = ALIGN(inl + sizeof(seg->byte_count), 16) / 16;
1894
1895 return 0;
1896 }
1897
1898 static int set_frwr_li_wr(void **seg, struct ib_send_wr *wr, int *size,
1899 struct mlx5_core_dev *mdev, struct mlx5_ib_pd *pd, struct mlx5_ib_qp *qp)
1900 {
1901 int writ = 0;
1902 int li;
1903
1904 li = wr->opcode == IB_WR_LOCAL_INV ? 1 : 0;
1905 if (unlikely(wr->send_flags & IB_SEND_INLINE))
1906 return -EINVAL;
1907
1908 set_frwr_umr_segment(*seg, wr, li);
1909 *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
1910 *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
1911 if (unlikely((*seg == qp->sq.qend)))
1912 *seg = mlx5_get_send_wqe(qp, 0);
1913 set_mkey_segment(*seg, wr, li, &writ);
1914 *seg += sizeof(struct mlx5_mkey_seg);
1915 *size += sizeof(struct mlx5_mkey_seg) / 16;
1916 if (unlikely((*seg == qp->sq.qend)))
1917 *seg = mlx5_get_send_wqe(qp, 0);
1918 if (!li) {
1919 set_frwr_pages(*seg, wr, mdev, pd, writ);
1920 *seg += sizeof(struct mlx5_wqe_data_seg);
1921 *size += (sizeof(struct mlx5_wqe_data_seg) / 16);
1922 }
1923 return 0;
1924 }
1925
1926 static void dump_wqe(struct mlx5_ib_qp *qp, int idx, int size_16)
1927 {
1928 __be32 *p = NULL;
1929 int tidx = idx;
1930 int i, j;
1931
1932 pr_debug("dump wqe at %p\n", mlx5_get_send_wqe(qp, tidx));
1933 for (i = 0, j = 0; i < size_16 * 4; i += 4, j += 4) {
1934 if ((i & 0xf) == 0) {
1935 void *buf = mlx5_get_send_wqe(qp, tidx);
1936 tidx = (tidx + 1) & (qp->sq.wqe_cnt - 1);
1937 p = buf;
1938 j = 0;
1939 }
1940 pr_debug("%08x %08x %08x %08x\n", be32_to_cpu(p[j]),
1941 be32_to_cpu(p[j + 1]), be32_to_cpu(p[j + 2]),
1942 be32_to_cpu(p[j + 3]));
1943 }
1944 }
1945
1946 static void mlx5_bf_copy(u64 __iomem *dst, u64 *src,
1947 unsigned bytecnt, struct mlx5_ib_qp *qp)
1948 {
1949 while (bytecnt > 0) {
1950 __iowrite64_copy(dst++, src++, 8);
1951 __iowrite64_copy(dst++, src++, 8);
1952 __iowrite64_copy(dst++, src++, 8);
1953 __iowrite64_copy(dst++, src++, 8);
1954 __iowrite64_copy(dst++, src++, 8);
1955 __iowrite64_copy(dst++, src++, 8);
1956 __iowrite64_copy(dst++, src++, 8);
1957 __iowrite64_copy(dst++, src++, 8);
1958 bytecnt -= 64;
1959 if (unlikely(src == qp->sq.qend))
1960 src = mlx5_get_send_wqe(qp, 0);
1961 }
1962 }
1963
1964 static u8 get_fence(u8 fence, struct ib_send_wr *wr)
1965 {
1966 if (unlikely(wr->opcode == IB_WR_LOCAL_INV &&
1967 wr->send_flags & IB_SEND_FENCE))
1968 return MLX5_FENCE_MODE_STRONG_ORDERING;
1969
1970 if (unlikely(fence)) {
1971 if (wr->send_flags & IB_SEND_FENCE)
1972 return MLX5_FENCE_MODE_SMALL_AND_FENCE;
1973 else
1974 return fence;
1975
1976 } else {
1977 return 0;
1978 }
1979 }
1980
1981 int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
1982 struct ib_send_wr **bad_wr)
1983 {
1984 struct mlx5_wqe_ctrl_seg *ctrl = NULL; /* compiler warning */
1985 struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
1986 struct mlx5_core_dev *mdev = &dev->mdev;
1987 struct mlx5_ib_qp *qp = to_mqp(ibqp);
1988 struct mlx5_wqe_data_seg *dpseg;
1989 struct mlx5_wqe_xrc_seg *xrc;
1990 struct mlx5_bf *bf = qp->bf;
1991 int uninitialized_var(size);
1992 void *qend = qp->sq.qend;
1993 unsigned long flags;
1994 u32 mlx5_opcode;
1995 unsigned idx;
1996 int err = 0;
1997 int inl = 0;
1998 int num_sge;
1999 void *seg;
2000 int nreq;
2001 int i;
2002 u8 next_fence = 0;
2003 u8 opmod = 0;
2004 u8 fence;
2005
2006 spin_lock_irqsave(&qp->sq.lock, flags);
2007
2008 for (nreq = 0; wr; nreq++, wr = wr->next) {
2009 if (unlikely(wr->opcode >= sizeof(mlx5_ib_opcode) / sizeof(mlx5_ib_opcode[0]))) {
2010 mlx5_ib_warn(dev, "\n");
2011 err = -EINVAL;
2012 *bad_wr = wr;
2013 goto out;
2014 }
2015
2016 if (unlikely(mlx5_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq))) {
2017 mlx5_ib_warn(dev, "\n");
2018 err = -ENOMEM;
2019 *bad_wr = wr;
2020 goto out;
2021 }
2022
2023 fence = qp->fm_cache;
2024 num_sge = wr->num_sge;
2025 if (unlikely(num_sge > qp->sq.max_gs)) {
2026 mlx5_ib_warn(dev, "\n");
2027 err = -ENOMEM;
2028 *bad_wr = wr;
2029 goto out;
2030 }
2031
2032 idx = qp->sq.cur_post & (qp->sq.wqe_cnt - 1);
2033 seg = mlx5_get_send_wqe(qp, idx);
2034 ctrl = seg;
2035 *(uint32_t *)(seg + 8) = 0;
2036 ctrl->imm = send_ieth(wr);
2037 ctrl->fm_ce_se = qp->sq_signal_bits |
2038 (wr->send_flags & IB_SEND_SIGNALED ?
2039 MLX5_WQE_CTRL_CQ_UPDATE : 0) |
2040 (wr->send_flags & IB_SEND_SOLICITED ?
2041 MLX5_WQE_CTRL_SOLICITED : 0);
2042
2043 seg += sizeof(*ctrl);
2044 size = sizeof(*ctrl) / 16;
2045
2046 switch (ibqp->qp_type) {
2047 case IB_QPT_XRC_INI:
2048 xrc = seg;
2049 xrc->xrc_srqn = htonl(wr->xrc_remote_srq_num);
2050 seg += sizeof(*xrc);
2051 size += sizeof(*xrc) / 16;
2052 /* fall through */
2053 case IB_QPT_RC:
2054 switch (wr->opcode) {
2055 case IB_WR_RDMA_READ:
2056 case IB_WR_RDMA_WRITE:
2057 case IB_WR_RDMA_WRITE_WITH_IMM:
2058 set_raddr_seg(seg, wr->wr.rdma.remote_addr,
2059 wr->wr.rdma.rkey);
2060 seg += sizeof(struct mlx5_wqe_raddr_seg);
2061 size += sizeof(struct mlx5_wqe_raddr_seg) / 16;
2062 break;
2063
2064 case IB_WR_ATOMIC_CMP_AND_SWP:
2065 case IB_WR_ATOMIC_FETCH_AND_ADD:
2066 set_raddr_seg(seg, wr->wr.atomic.remote_addr,
2067 wr->wr.atomic.rkey);
2068 seg += sizeof(struct mlx5_wqe_raddr_seg);
2069
2070 set_atomic_seg(seg, wr);
2071 seg += sizeof(struct mlx5_wqe_atomic_seg);
2072
2073 size += (sizeof(struct mlx5_wqe_raddr_seg) +
2074 sizeof(struct mlx5_wqe_atomic_seg)) / 16;
2075 break;
2076
2077 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
2078 set_raddr_seg(seg, wr->wr.atomic.remote_addr,
2079 wr->wr.atomic.rkey);
2080 seg += sizeof(struct mlx5_wqe_raddr_seg);
2081
2082 set_masked_atomic_seg(seg, wr);
2083 seg += sizeof(struct mlx5_wqe_masked_atomic_seg);
2084
2085 size += (sizeof(struct mlx5_wqe_raddr_seg) +
2086 sizeof(struct mlx5_wqe_masked_atomic_seg)) / 16;
2087 break;
2088
2089 case IB_WR_LOCAL_INV:
2090 next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL;
2091 qp->sq.wr_data[idx] = IB_WR_LOCAL_INV;
2092 ctrl->imm = cpu_to_be32(wr->ex.invalidate_rkey);
2093 err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp);
2094 if (err) {
2095 mlx5_ib_warn(dev, "\n");
2096 *bad_wr = wr;
2097 goto out;
2098 }
2099 num_sge = 0;
2100 break;
2101
2102 case IB_WR_FAST_REG_MR:
2103 next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL;
2104 qp->sq.wr_data[idx] = IB_WR_FAST_REG_MR;
2105 ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey);
2106 err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp);
2107 if (err) {
2108 mlx5_ib_warn(dev, "\n");
2109 *bad_wr = wr;
2110 goto out;
2111 }
2112 num_sge = 0;
2113 break;
2114
2115 default:
2116 break;
2117 }
2118 break;
2119
2120 case IB_QPT_UC:
2121 switch (wr->opcode) {
2122 case IB_WR_RDMA_WRITE:
2123 case IB_WR_RDMA_WRITE_WITH_IMM:
2124 set_raddr_seg(seg, wr->wr.rdma.remote_addr,
2125 wr->wr.rdma.rkey);
2126 seg += sizeof(struct mlx5_wqe_raddr_seg);
2127 size += sizeof(struct mlx5_wqe_raddr_seg) / 16;
2128 break;
2129
2130 default:
2131 break;
2132 }
2133 break;
2134
2135 case IB_QPT_UD:
2136 case IB_QPT_SMI:
2137 case IB_QPT_GSI:
2138 set_datagram_seg(seg, wr);
2139 seg += sizeof(struct mlx5_wqe_datagram_seg);
2140 size += sizeof(struct mlx5_wqe_datagram_seg) / 16;
2141 if (unlikely((seg == qend)))
2142 seg = mlx5_get_send_wqe(qp, 0);
2143 break;
2144
2145 case MLX5_IB_QPT_REG_UMR:
2146 if (wr->opcode != MLX5_IB_WR_UMR) {
2147 err = -EINVAL;
2148 mlx5_ib_warn(dev, "bad opcode\n");
2149 goto out;
2150 }
2151 qp->sq.wr_data[idx] = MLX5_IB_WR_UMR;
2152 ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey);
2153 set_reg_umr_segment(seg, wr);
2154 seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
2155 size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
2156 if (unlikely((seg == qend)))
2157 seg = mlx5_get_send_wqe(qp, 0);
2158 set_reg_mkey_segment(seg, wr);
2159 seg += sizeof(struct mlx5_mkey_seg);
2160 size += sizeof(struct mlx5_mkey_seg) / 16;
2161 if (unlikely((seg == qend)))
2162 seg = mlx5_get_send_wqe(qp, 0);
2163 break;
2164
2165 default:
2166 break;
2167 }
2168
2169 if (wr->send_flags & IB_SEND_INLINE && num_sge) {
2170 int uninitialized_var(sz);
2171
2172 err = set_data_inl_seg(qp, wr, seg, &sz);
2173 if (unlikely(err)) {
2174 mlx5_ib_warn(dev, "\n");
2175 *bad_wr = wr;
2176 goto out;
2177 }
2178 inl = 1;
2179 size += sz;
2180 } else {
2181 dpseg = seg;
2182 for (i = 0; i < num_sge; i++) {
2183 if (unlikely(dpseg == qend)) {
2184 seg = mlx5_get_send_wqe(qp, 0);
2185 dpseg = seg;
2186 }
2187 if (likely(wr->sg_list[i].length)) {
2188 set_data_ptr_seg(dpseg, wr->sg_list + i);
2189 size += sizeof(struct mlx5_wqe_data_seg) / 16;
2190 dpseg++;
2191 }
2192 }
2193 }
2194
2195 mlx5_opcode = mlx5_ib_opcode[wr->opcode];
2196 ctrl->opmod_idx_opcode = cpu_to_be32(((u32)(qp->sq.cur_post) << 8) |
2197 mlx5_opcode |
2198 ((u32)opmod << 24));
2199 ctrl->qpn_ds = cpu_to_be32(size | (qp->mqp.qpn << 8));
2200 ctrl->fm_ce_se |= get_fence(fence, wr);
2201 qp->fm_cache = next_fence;
2202 if (unlikely(qp->wq_sig))
2203 ctrl->signature = wq_sig(ctrl);
2204
2205 qp->sq.wrid[idx] = wr->wr_id;
2206 qp->sq.w_list[idx].opcode = mlx5_opcode;
2207 qp->sq.wqe_head[idx] = qp->sq.head + nreq;
2208 qp->sq.cur_post += DIV_ROUND_UP(size * 16, MLX5_SEND_WQE_BB);
2209 qp->sq.w_list[idx].next = qp->sq.cur_post;
2210
2211 if (0)
2212 dump_wqe(qp, idx, size);
2213 }
2214
2215 out:
2216 if (likely(nreq)) {
2217 qp->sq.head += nreq;
2218
2219 /* Make sure that descriptors are written before
2220 * updating doorbell record and ringing the doorbell
2221 */
2222 wmb();
2223
2224 qp->db.db[MLX5_SND_DBR] = cpu_to_be32(qp->sq.cur_post);
2225
2226 if (bf->need_lock)
2227 spin_lock(&bf->lock);
2228
2229 /* TBD enable WC */
2230 if (0 && nreq == 1 && bf->uuarn && inl && size > 1 && size <= bf->buf_size / 16) {
2231 mlx5_bf_copy(bf->reg + bf->offset, (u64 *)ctrl, ALIGN(size * 16, 64), qp);
2232 /* wc_wmb(); */
2233 } else {
2234 mlx5_write64((__be32 *)ctrl, bf->regreg + bf->offset,
2235 MLX5_GET_DOORBELL_LOCK(&bf->lock32));
2236 /* Make sure doorbells don't leak out of SQ spinlock
2237 * and reach the HCA out of order.
2238 */
2239 mmiowb();
2240 }
2241 bf->offset ^= bf->buf_size;
2242 if (bf->need_lock)
2243 spin_unlock(&bf->lock);
2244 }
2245
2246 spin_unlock_irqrestore(&qp->sq.lock, flags);
2247
2248 return err;
2249 }
2250
2251 static void set_sig_seg(struct mlx5_rwqe_sig *sig, int size)
2252 {
2253 sig->signature = calc_sig(sig, size);
2254 }
2255
2256 int mlx5_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
2257 struct ib_recv_wr **bad_wr)
2258 {
2259 struct mlx5_ib_qp *qp = to_mqp(ibqp);
2260 struct mlx5_wqe_data_seg *scat;
2261 struct mlx5_rwqe_sig *sig;
2262 unsigned long flags;
2263 int err = 0;
2264 int nreq;
2265 int ind;
2266 int i;
2267
2268 spin_lock_irqsave(&qp->rq.lock, flags);
2269
2270 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
2271
2272 for (nreq = 0; wr; nreq++, wr = wr->next) {
2273 if (mlx5_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
2274 err = -ENOMEM;
2275 *bad_wr = wr;
2276 goto out;
2277 }
2278
2279 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
2280 err = -EINVAL;
2281 *bad_wr = wr;
2282 goto out;
2283 }
2284
2285 scat = get_recv_wqe(qp, ind);
2286 if (qp->wq_sig)
2287 scat++;
2288
2289 for (i = 0; i < wr->num_sge; i++)
2290 set_data_ptr_seg(scat + i, wr->sg_list + i);
2291
2292 if (i < qp->rq.max_gs) {
2293 scat[i].byte_count = 0;
2294 scat[i].lkey = cpu_to_be32(MLX5_INVALID_LKEY);
2295 scat[i].addr = 0;
2296 }
2297
2298 if (qp->wq_sig) {
2299 sig = (struct mlx5_rwqe_sig *)scat;
2300 set_sig_seg(sig, (qp->rq.max_gs + 1) << 2);
2301 }
2302
2303 qp->rq.wrid[ind] = wr->wr_id;
2304
2305 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
2306 }
2307
2308 out:
2309 if (likely(nreq)) {
2310 qp->rq.head += nreq;
2311
2312 /* Make sure that descriptors are written before
2313 * doorbell record.
2314 */
2315 wmb();
2316
2317 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
2318 }
2319
2320 spin_unlock_irqrestore(&qp->rq.lock, flags);
2321
2322 return err;
2323 }
2324
2325 static inline enum ib_qp_state to_ib_qp_state(enum mlx5_qp_state mlx5_state)
2326 {
2327 switch (mlx5_state) {
2328 case MLX5_QP_STATE_RST: return IB_QPS_RESET;
2329 case MLX5_QP_STATE_INIT: return IB_QPS_INIT;
2330 case MLX5_QP_STATE_RTR: return IB_QPS_RTR;
2331 case MLX5_QP_STATE_RTS: return IB_QPS_RTS;
2332 case MLX5_QP_STATE_SQ_DRAINING:
2333 case MLX5_QP_STATE_SQD: return IB_QPS_SQD;
2334 case MLX5_QP_STATE_SQER: return IB_QPS_SQE;
2335 case MLX5_QP_STATE_ERR: return IB_QPS_ERR;
2336 default: return -1;
2337 }
2338 }
2339
2340 static inline enum ib_mig_state to_ib_mig_state(int mlx5_mig_state)
2341 {
2342 switch (mlx5_mig_state) {
2343 case MLX5_QP_PM_ARMED: return IB_MIG_ARMED;
2344 case MLX5_QP_PM_REARM: return IB_MIG_REARM;
2345 case MLX5_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
2346 default: return -1;
2347 }
2348 }
2349
2350 static int to_ib_qp_access_flags(int mlx5_flags)
2351 {
2352 int ib_flags = 0;
2353
2354 if (mlx5_flags & MLX5_QP_BIT_RRE)
2355 ib_flags |= IB_ACCESS_REMOTE_READ;
2356 if (mlx5_flags & MLX5_QP_BIT_RWE)
2357 ib_flags |= IB_ACCESS_REMOTE_WRITE;
2358 if (mlx5_flags & MLX5_QP_BIT_RAE)
2359 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
2360
2361 return ib_flags;
2362 }
2363
2364 static void to_ib_ah_attr(struct mlx5_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr,
2365 struct mlx5_qp_path *path)
2366 {
2367 struct mlx5_core_dev *dev = &ibdev->mdev;
2368
2369 memset(ib_ah_attr, 0, sizeof(*ib_ah_attr));
2370 ib_ah_attr->port_num = path->port;
2371
2372 if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports)
2373 return;
2374
2375 ib_ah_attr->sl = path->sl & 0xf;
2376
2377 ib_ah_attr->dlid = be16_to_cpu(path->rlid);
2378 ib_ah_attr->src_path_bits = path->grh_mlid & 0x7f;
2379 ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0;
2380 ib_ah_attr->ah_flags = (path->grh_mlid & (1 << 7)) ? IB_AH_GRH : 0;
2381 if (ib_ah_attr->ah_flags) {
2382 ib_ah_attr->grh.sgid_index = path->mgid_index;
2383 ib_ah_attr->grh.hop_limit = path->hop_limit;
2384 ib_ah_attr->grh.traffic_class =
2385 (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff;
2386 ib_ah_attr->grh.flow_label =
2387 be32_to_cpu(path->tclass_flowlabel) & 0xfffff;
2388 memcpy(ib_ah_attr->grh.dgid.raw,
2389 path->rgid, sizeof(ib_ah_attr->grh.dgid.raw));
2390 }
2391 }
2392
2393 int mlx5_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
2394 struct ib_qp_init_attr *qp_init_attr)
2395 {
2396 struct mlx5_ib_dev *dev = to_mdev(ibqp->device);
2397 struct mlx5_ib_qp *qp = to_mqp(ibqp);
2398 struct mlx5_query_qp_mbox_out *outb;
2399 struct mlx5_qp_context *context;
2400 int mlx5_state;
2401 int err = 0;
2402
2403 mutex_lock(&qp->mutex);
2404 outb = kzalloc(sizeof(*outb), GFP_KERNEL);
2405 if (!outb) {
2406 err = -ENOMEM;
2407 goto out;
2408 }
2409 context = &outb->ctx;
2410 err = mlx5_core_qp_query(&dev->mdev, &qp->mqp, outb, sizeof(*outb));
2411 if (err)
2412 goto out_free;
2413
2414 mlx5_state = be32_to_cpu(context->flags) >> 28;
2415
2416 qp->state = to_ib_qp_state(mlx5_state);
2417 qp_attr->qp_state = qp->state;
2418 qp_attr->path_mtu = context->mtu_msgmax >> 5;
2419 qp_attr->path_mig_state =
2420 to_ib_mig_state((be32_to_cpu(context->flags) >> 11) & 0x3);
2421 qp_attr->qkey = be32_to_cpu(context->qkey);
2422 qp_attr->rq_psn = be32_to_cpu(context->rnr_nextrecvpsn) & 0xffffff;
2423 qp_attr->sq_psn = be32_to_cpu(context->next_send_psn) & 0xffffff;
2424 qp_attr->dest_qp_num = be32_to_cpu(context->log_pg_sz_remote_qpn) & 0xffffff;
2425 qp_attr->qp_access_flags =
2426 to_ib_qp_access_flags(be32_to_cpu(context->params2));
2427
2428 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
2429 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path);
2430 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path);
2431 qp_attr->alt_pkey_index = context->alt_path.pkey_index & 0x7f;
2432 qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num;
2433 }
2434
2435 qp_attr->pkey_index = context->pri_path.pkey_index & 0x7f;
2436 qp_attr->port_num = context->pri_path.port;
2437
2438 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
2439 qp_attr->sq_draining = mlx5_state == MLX5_QP_STATE_SQ_DRAINING;
2440
2441 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context->params1) >> 21) & 0x7);
2442
2443 qp_attr->max_dest_rd_atomic =
2444 1 << ((be32_to_cpu(context->params2) >> 21) & 0x7);
2445 qp_attr->min_rnr_timer =
2446 (be32_to_cpu(context->rnr_nextrecvpsn) >> 24) & 0x1f;
2447 qp_attr->timeout = context->pri_path.ackto_lt >> 3;
2448 qp_attr->retry_cnt = (be32_to_cpu(context->params1) >> 16) & 0x7;
2449 qp_attr->rnr_retry = (be32_to_cpu(context->params1) >> 13) & 0x7;
2450 qp_attr->alt_timeout = context->alt_path.ackto_lt >> 3;
2451 qp_attr->cur_qp_state = qp_attr->qp_state;
2452 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
2453 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
2454
2455 if (!ibqp->uobject) {
2456 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
2457 qp_attr->cap.max_send_sge = qp->sq.max_gs;
2458 } else {
2459 qp_attr->cap.max_send_wr = 0;
2460 qp_attr->cap.max_send_sge = 0;
2461 }
2462
2463 /* We don't support inline sends for kernel QPs (yet), and we
2464 * don't know what userspace's value should be.
2465 */
2466 qp_attr->cap.max_inline_data = 0;
2467
2468 qp_init_attr->cap = qp_attr->cap;
2469
2470 qp_init_attr->create_flags = 0;
2471 if (qp->flags & MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK)
2472 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
2473
2474 qp_init_attr->sq_sig_type = qp->sq_signal_bits & MLX5_WQE_CTRL_CQ_UPDATE ?
2475 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
2476
2477 out_free:
2478 kfree(outb);
2479
2480 out:
2481 mutex_unlock(&qp->mutex);
2482 return err;
2483 }
2484
2485 struct ib_xrcd *mlx5_ib_alloc_xrcd(struct ib_device *ibdev,
2486 struct ib_ucontext *context,
2487 struct ib_udata *udata)
2488 {
2489 struct mlx5_ib_dev *dev = to_mdev(ibdev);
2490 struct mlx5_ib_xrcd *xrcd;
2491 int err;
2492
2493 if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_XRC))
2494 return ERR_PTR(-ENOSYS);
2495
2496 xrcd = kmalloc(sizeof(*xrcd), GFP_KERNEL);
2497 if (!xrcd)
2498 return ERR_PTR(-ENOMEM);
2499
2500 err = mlx5_core_xrcd_alloc(&dev->mdev, &xrcd->xrcdn);
2501 if (err) {
2502 kfree(xrcd);
2503 return ERR_PTR(-ENOMEM);
2504 }
2505
2506 return &xrcd->ibxrcd;
2507 }
2508
2509 int mlx5_ib_dealloc_xrcd(struct ib_xrcd *xrcd)
2510 {
2511 struct mlx5_ib_dev *dev = to_mdev(xrcd->device);
2512 u32 xrcdn = to_mxrcd(xrcd)->xrcdn;
2513 int err;
2514
2515 err = mlx5_core_xrcd_dealloc(&dev->mdev, xrcdn);
2516 if (err) {
2517 mlx5_ib_warn(dev, "failed to dealloc xrcdn 0x%x\n", xrcdn);
2518 return err;
2519 }
2520
2521 kfree(xrcd);
2522
2523 return 0;
2524 }
ubuntu-bionic-kernel mirror