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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / infiniband / hw / mlx4 / qp.c
blob9d08aa99f3cb064bc55e467f2f1bfa7c2413698b
1 /*
2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include <linux/log2.h>
35 #include <linux/etherdevice.h>
36 #include <net/ip.h>
37 #include <linux/slab.h>
38 #include <linux/netdevice.h>
39
40 #include <rdma/ib_cache.h>
41 #include <rdma/ib_pack.h>
42 #include <rdma/ib_addr.h>
43 #include <rdma/ib_mad.h>
44 #include <rdma/uverbs_ioctl.h>
45
46 #include <linux/mlx4/driver.h>
47 #include <linux/mlx4/qp.h>
48
49 #include "mlx4_ib.h"
50 #include <rdma/mlx4-abi.h>
51
52 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq,
53 struct mlx4_ib_cq *recv_cq);
54 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq,
55 struct mlx4_ib_cq *recv_cq);
56 static int _mlx4_ib_modify_wq(struct ib_wq *ibwq, enum ib_wq_state new_state,
57 struct ib_udata *udata);
58
59 enum {
60 MLX4_IB_ACK_REQ_FREQ = 8,
61 };
62
63 enum {
64 MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
65 MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
66 MLX4_IB_LINK_TYPE_IB = 0,
67 MLX4_IB_LINK_TYPE_ETH = 1
68 };
69
70 enum {
71 MLX4_IB_MIN_SQ_STRIDE = 6,
72 MLX4_IB_CACHE_LINE_SIZE = 64,
73 };
74
75 enum {
76 MLX4_RAW_QP_MTU = 7,
77 MLX4_RAW_QP_MSGMAX = 31,
78 };
79
80 #ifndef ETH_ALEN
81 #define ETH_ALEN 6
82 #endif
83
84 static const __be32 mlx4_ib_opcode[] = {
85 [IB_WR_SEND] = cpu_to_be32(MLX4_OPCODE_SEND),
86 [IB_WR_LSO] = cpu_to_be32(MLX4_OPCODE_LSO),
87 [IB_WR_SEND_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_SEND_IMM),
88 [IB_WR_RDMA_WRITE] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
89 [IB_WR_RDMA_WRITE_WITH_IMM] = cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
90 [IB_WR_RDMA_READ] = cpu_to_be32(MLX4_OPCODE_RDMA_READ),
91 [IB_WR_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
92 [IB_WR_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
93 [IB_WR_SEND_WITH_INV] = cpu_to_be32(MLX4_OPCODE_SEND_INVAL),
94 [IB_WR_LOCAL_INV] = cpu_to_be32(MLX4_OPCODE_LOCAL_INVAL),
95 [IB_WR_REG_MR] = cpu_to_be32(MLX4_OPCODE_FMR),
96 [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_CS),
97 [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = cpu_to_be32(MLX4_OPCODE_MASKED_ATOMIC_FA),
98 };
99
100 enum mlx4_ib_source_type {
101 MLX4_IB_QP_SRC = 0,
102 MLX4_IB_RWQ_SRC = 1,
103 };
104
105 struct mlx4_ib_qp_event_work {
106 struct work_struct work;
107 struct mlx4_qp *qp;
108 enum mlx4_event type;
109 };
110
111 static struct workqueue_struct *mlx4_ib_qp_event_wq;
112
113 static int is_tunnel_qp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
114 {
115 if (!mlx4_is_master(dev->dev))
116 return 0;
117
118 return qp->mqp.qpn >= dev->dev->phys_caps.base_tunnel_sqpn &&
119 qp->mqp.qpn < dev->dev->phys_caps.base_tunnel_sqpn +
120 8 * MLX4_MFUNC_MAX;
121 }
122
123 static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
124 {
125 int proxy_sqp = 0;
126 int real_sqp = 0;
127 int i;
128 /* PPF or Native -- real SQP */
129 real_sqp = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
130 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
131 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 3);
132 if (real_sqp)
133 return 1;
134 /* VF or PF -- proxy SQP */
135 if (mlx4_is_mfunc(dev->dev)) {
136 for (i = 0; i < dev->dev->caps.num_ports; i++) {
137 if (qp->mqp.qpn == dev->dev->caps.spec_qps[i].qp0_proxy ||
138 qp->mqp.qpn == dev->dev->caps.spec_qps[i].qp1_proxy) {
139 proxy_sqp = 1;
140 break;
141 }
142 }
143 }
144 if (proxy_sqp)
145 return 1;
146
147 return !!(qp->flags & MLX4_IB_ROCE_V2_GSI_QP);
148 }
149
150 /* used for INIT/CLOSE port logic */
151 static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
152 {
153 int proxy_qp0 = 0;
154 int real_qp0 = 0;
155 int i;
156 /* PPF or Native -- real QP0 */
157 real_qp0 = ((mlx4_is_master(dev->dev) || !mlx4_is_mfunc(dev->dev)) &&
158 qp->mqp.qpn >= dev->dev->phys_caps.base_sqpn &&
159 qp->mqp.qpn <= dev->dev->phys_caps.base_sqpn + 1);
160 if (real_qp0)
161 return 1;
162 /* VF or PF -- proxy QP0 */
163 if (mlx4_is_mfunc(dev->dev)) {
164 for (i = 0; i < dev->dev->caps.num_ports; i++) {
165 if (qp->mqp.qpn == dev->dev->caps.spec_qps[i].qp0_proxy) {
166 proxy_qp0 = 1;
167 break;
168 }
169 }
170 }
171 return proxy_qp0;
172 }
173
174 static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
175 {
176 return mlx4_buf_offset(&qp->buf, offset);
177 }
178
179 static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
180 {
181 return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
182 }
183
184 static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
185 {
186 return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
187 }
188
189 /*
190 * Stamp a SQ WQE so that it is invalid if prefetched by marking the
191 * first four bytes of every 64 byte chunk with 0xffffffff, except for
192 * the very first chunk of the WQE.
193 */
194 static void stamp_send_wqe(struct mlx4_ib_qp *qp, int n)
195 {
196 __be32 *wqe;
197 int i;
198 int s;
199 void *buf;
200 struct mlx4_wqe_ctrl_seg *ctrl;
201
202 buf = get_send_wqe(qp, n & (qp->sq.wqe_cnt - 1));
203 ctrl = (struct mlx4_wqe_ctrl_seg *)buf;
204 s = (ctrl->qpn_vlan.fence_size & 0x3f) << 4;
205 for (i = 64; i < s; i += 64) {
206 wqe = buf + i;
207 *wqe = cpu_to_be32(0xffffffff);
208 }
209 }
210
211 static void mlx4_ib_handle_qp_event(struct work_struct *_work)
212 {
213 struct mlx4_ib_qp_event_work *qpe_work =
214 container_of(_work, struct mlx4_ib_qp_event_work, work);
215 struct ib_qp *ibqp = &to_mibqp(qpe_work->qp)->ibqp;
216 struct ib_event event = {};
217
218 event.device = ibqp->device;
219 event.element.qp = ibqp;
220
221 switch (qpe_work->type) {
222 case MLX4_EVENT_TYPE_PATH_MIG:
223 event.event = IB_EVENT_PATH_MIG;
224 break;
225 case MLX4_EVENT_TYPE_COMM_EST:
226 event.event = IB_EVENT_COMM_EST;
227 break;
228 case MLX4_EVENT_TYPE_SQ_DRAINED:
229 event.event = IB_EVENT_SQ_DRAINED;
230 break;
231 case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
232 event.event = IB_EVENT_QP_LAST_WQE_REACHED;
233 break;
234 case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
235 event.event = IB_EVENT_QP_FATAL;
236 break;
237 case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
238 event.event = IB_EVENT_PATH_MIG_ERR;
239 break;
240 case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
241 event.event = IB_EVENT_QP_REQ_ERR;
242 break;
243 case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
244 event.event = IB_EVENT_QP_ACCESS_ERR;
245 break;
246 default:
247 pr_warn("Unexpected event type %d on QP %06x\n",
248 qpe_work->type, qpe_work->qp->qpn);
249 goto out;
250 }
251
252 ibqp->event_handler(&event, ibqp->qp_context);
253
254 out:
255 mlx4_put_qp(qpe_work->qp);
256 kfree(qpe_work);
257 }
258
259 static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
260 {
261 struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
262 struct mlx4_ib_qp_event_work *qpe_work;
263
264 if (type == MLX4_EVENT_TYPE_PATH_MIG)
265 to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
266
267 if (!ibqp->event_handler)
268 goto out_no_handler;
269
270 qpe_work = kzalloc(sizeof(*qpe_work), GFP_ATOMIC);
271 if (!qpe_work)
272 goto out_no_handler;
273
274 qpe_work->qp = qp;
275 qpe_work->type = type;
276 INIT_WORK(&qpe_work->work, mlx4_ib_handle_qp_event);
277 queue_work(mlx4_ib_qp_event_wq, &qpe_work->work);
278 return;
279
280 out_no_handler:
281 mlx4_put_qp(qp);
282 }
283
284 static void mlx4_ib_wq_event(struct mlx4_qp *qp, enum mlx4_event type)
285 {
286 pr_warn_ratelimited("Unexpected event type %d on WQ 0x%06x. Events are not supported for WQs\n",
287 type, qp->qpn);
288 }
289
290 static int send_wqe_overhead(enum mlx4_ib_qp_type type, u32 flags)
291 {
292 /*
293 * UD WQEs must have a datagram segment.
294 * RC and UC WQEs might have a remote address segment.
295 * MLX WQEs need two extra inline data segments (for the UD
296 * header and space for the ICRC).
297 */
298 switch (type) {
299 case MLX4_IB_QPT_UD:
300 return sizeof (struct mlx4_wqe_ctrl_seg) +
301 sizeof (struct mlx4_wqe_datagram_seg) +
302 ((flags & MLX4_IB_QP_LSO) ? MLX4_IB_LSO_HEADER_SPARE : 0);
303 case MLX4_IB_QPT_PROXY_SMI_OWNER:
304 case MLX4_IB_QPT_PROXY_SMI:
305 case MLX4_IB_QPT_PROXY_GSI:
306 return sizeof (struct mlx4_wqe_ctrl_seg) +
307 sizeof (struct mlx4_wqe_datagram_seg) + 64;
308 case MLX4_IB_QPT_TUN_SMI_OWNER:
309 case MLX4_IB_QPT_TUN_GSI:
310 return sizeof (struct mlx4_wqe_ctrl_seg) +
311 sizeof (struct mlx4_wqe_datagram_seg);
312
313 case MLX4_IB_QPT_UC:
314 return sizeof (struct mlx4_wqe_ctrl_seg) +
315 sizeof (struct mlx4_wqe_raddr_seg);
316 case MLX4_IB_QPT_RC:
317 return sizeof (struct mlx4_wqe_ctrl_seg) +
318 sizeof (struct mlx4_wqe_masked_atomic_seg) +
319 sizeof (struct mlx4_wqe_raddr_seg);
320 case MLX4_IB_QPT_SMI:
321 case MLX4_IB_QPT_GSI:
322 return sizeof (struct mlx4_wqe_ctrl_seg) +
323 ALIGN(MLX4_IB_UD_HEADER_SIZE +
324 DIV_ROUND_UP(MLX4_IB_UD_HEADER_SIZE,
325 MLX4_INLINE_ALIGN) *
326 sizeof (struct mlx4_wqe_inline_seg),
327 sizeof (struct mlx4_wqe_data_seg)) +
328 ALIGN(4 +
329 sizeof (struct mlx4_wqe_inline_seg),
330 sizeof (struct mlx4_wqe_data_seg));
331 default:
332 return sizeof (struct mlx4_wqe_ctrl_seg);
333 }
334 }
335
336 static int set_rq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
337 bool is_user, bool has_rq, struct mlx4_ib_qp *qp,
338 u32 inl_recv_sz)
339 {
340 /* Sanity check RQ size before proceeding */
341 if (cap->max_recv_wr > dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE ||
342 cap->max_recv_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg))
343 return -EINVAL;
344
345 if (!has_rq) {
346 if (cap->max_recv_wr || inl_recv_sz)
347 return -EINVAL;
348
349 qp->rq.wqe_cnt = qp->rq.max_gs = 0;
350 } else {
351 u32 max_inl_recv_sz = dev->dev->caps.max_rq_sg *
352 sizeof(struct mlx4_wqe_data_seg);
353 u32 wqe_size;
354
355 /* HW requires >= 1 RQ entry with >= 1 gather entry */
356 if (is_user && (!cap->max_recv_wr || !cap->max_recv_sge ||
357 inl_recv_sz > max_inl_recv_sz))
358 return -EINVAL;
359
360 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, cap->max_recv_wr));
361 qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
362 wqe_size = qp->rq.max_gs * sizeof(struct mlx4_wqe_data_seg);
363 qp->rq.wqe_shift = ilog2(max_t(u32, wqe_size, inl_recv_sz));
364 }
365
366 /* leave userspace return values as they were, so as not to break ABI */
367 if (is_user) {
368 cap->max_recv_wr = qp->rq.max_post = qp->rq.wqe_cnt;
369 cap->max_recv_sge = qp->rq.max_gs;
370 } else {
371 cap->max_recv_wr = qp->rq.max_post =
372 min(dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE, qp->rq.wqe_cnt);
373 cap->max_recv_sge = min(qp->rq.max_gs,
374 min(dev->dev->caps.max_sq_sg,
375 dev->dev->caps.max_rq_sg));
376 }
377
378 return 0;
379 }
380
381 static int set_kernel_sq_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
382 enum mlx4_ib_qp_type type, struct mlx4_ib_qp *qp)
383 {
384 int s;
385
386 /* Sanity check SQ size before proceeding */
387 if (cap->max_send_wr > (dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE) ||
388 cap->max_send_sge > min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg) ||
389 cap->max_inline_data + send_wqe_overhead(type, qp->flags) +
390 sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
391 return -EINVAL;
392
393 /*
394 * For MLX transport we need 2 extra S/G entries:
395 * one for the header and one for the checksum at the end
396 */
397 if ((type == MLX4_IB_QPT_SMI || type == MLX4_IB_QPT_GSI ||
398 type & (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) &&
399 cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
400 return -EINVAL;
401
402 s = max(cap->max_send_sge * sizeof (struct mlx4_wqe_data_seg),
403 cap->max_inline_data + sizeof (struct mlx4_wqe_inline_seg)) +
404 send_wqe_overhead(type, qp->flags);
405
406 if (s > dev->dev->caps.max_sq_desc_sz)
407 return -EINVAL;
408
409 qp->sq.wqe_shift = ilog2(roundup_pow_of_two(s));
410
411 /*
412 * We need to leave 2 KB + 1 WR of headroom in the SQ to
413 * allow HW to prefetch.
414 */
415 qp->sq_spare_wqes = MLX4_IB_SQ_HEADROOM(qp->sq.wqe_shift);
416 qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr +
417 qp->sq_spare_wqes);
418
419 qp->sq.max_gs =
420 (min(dev->dev->caps.max_sq_desc_sz,
421 (1 << qp->sq.wqe_shift)) -
422 send_wqe_overhead(type, qp->flags)) /
423 sizeof (struct mlx4_wqe_data_seg);
424
425 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
426 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
427 if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
428 qp->rq.offset = 0;
429 qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
430 } else {
431 qp->rq.offset = qp->sq.wqe_cnt << qp->sq.wqe_shift;
432 qp->sq.offset = 0;
433 }
434
435 cap->max_send_wr = qp->sq.max_post =
436 qp->sq.wqe_cnt - qp->sq_spare_wqes;
437 cap->max_send_sge = min(qp->sq.max_gs,
438 min(dev->dev->caps.max_sq_sg,
439 dev->dev->caps.max_rq_sg));
440 /* We don't support inline sends for kernel QPs (yet) */
441 cap->max_inline_data = 0;
442
443 return 0;
444 }
445
446 static int set_user_sq_size(struct mlx4_ib_dev *dev,
447 struct mlx4_ib_qp *qp,
448 struct mlx4_ib_create_qp *ucmd)
449 {
450 u32 cnt;
451
452 /* Sanity check SQ size before proceeding */
453 if (check_shl_overflow(1, ucmd->log_sq_bb_count, &cnt) ||
454 cnt > dev->dev->caps.max_wqes)
455 return -EINVAL;
456 if (ucmd->log_sq_stride >
457 ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) ||
458 ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE)
459 return -EINVAL;
460
461 qp->sq.wqe_cnt = 1 << ucmd->log_sq_bb_count;
462 qp->sq.wqe_shift = ucmd->log_sq_stride;
463
464 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
465 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
466
467 return 0;
468 }
469
470 static int alloc_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
471 {
472 int i;
473
474 qp->sqp_proxy_rcv =
475 kmalloc_array(qp->rq.wqe_cnt, sizeof(struct mlx4_ib_buf),
476 GFP_KERNEL);
477 if (!qp->sqp_proxy_rcv)
478 return -ENOMEM;
479 for (i = 0; i < qp->rq.wqe_cnt; i++) {
480 qp->sqp_proxy_rcv[i].addr =
481 kmalloc(sizeof (struct mlx4_ib_proxy_sqp_hdr),
482 GFP_KERNEL);
483 if (!qp->sqp_proxy_rcv[i].addr)
484 goto err;
485 qp->sqp_proxy_rcv[i].map =
486 ib_dma_map_single(dev, qp->sqp_proxy_rcv[i].addr,
487 sizeof (struct mlx4_ib_proxy_sqp_hdr),
488 DMA_FROM_DEVICE);
489 if (ib_dma_mapping_error(dev, qp->sqp_proxy_rcv[i].map)) {
490 kfree(qp->sqp_proxy_rcv[i].addr);
491 goto err;
492 }
493 }
494 return 0;
495
496 err:
497 while (i > 0) {
498 --i;
499 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
500 sizeof (struct mlx4_ib_proxy_sqp_hdr),
501 DMA_FROM_DEVICE);
502 kfree(qp->sqp_proxy_rcv[i].addr);
503 }
504 kfree(qp->sqp_proxy_rcv);
505 qp->sqp_proxy_rcv = NULL;
506 return -ENOMEM;
507 }
508
509 static void free_proxy_bufs(struct ib_device *dev, struct mlx4_ib_qp *qp)
510 {
511 int i;
512
513 for (i = 0; i < qp->rq.wqe_cnt; i++) {
514 ib_dma_unmap_single(dev, qp->sqp_proxy_rcv[i].map,
515 sizeof (struct mlx4_ib_proxy_sqp_hdr),
516 DMA_FROM_DEVICE);
517 kfree(qp->sqp_proxy_rcv[i].addr);
518 }
519 kfree(qp->sqp_proxy_rcv);
520 }
521
522 static bool qp_has_rq(struct ib_qp_init_attr *attr)
523 {
524 if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT)
525 return false;
526
527 return !attr->srq;
528 }
529
530 static int qp0_enabled_vf(struct mlx4_dev *dev, int qpn)
531 {
532 int i;
533 for (i = 0; i < dev->caps.num_ports; i++) {
534 if (qpn == dev->caps.spec_qps[i].qp0_proxy)
535 return !!dev->caps.spec_qps[i].qp0_qkey;
536 }
537 return 0;
538 }
539
540 static void mlx4_ib_free_qp_counter(struct mlx4_ib_dev *dev,
541 struct mlx4_ib_qp *qp)
542 {
543 mutex_lock(&dev->counters_table[qp->port - 1].mutex);
544 mlx4_counter_free(dev->dev, qp->counter_index->index);
545 list_del(&qp->counter_index->list);
546 mutex_unlock(&dev->counters_table[qp->port - 1].mutex);
547
548 kfree(qp->counter_index);
549 qp->counter_index = NULL;
550 }
551
552 static int set_qp_rss(struct mlx4_ib_dev *dev, struct mlx4_ib_rss *rss_ctx,
553 struct ib_qp_init_attr *init_attr,
554 struct mlx4_ib_create_qp_rss *ucmd)
555 {
556 rss_ctx->base_qpn_tbl_sz = init_attr->rwq_ind_tbl->ind_tbl[0]->wq_num |
557 (init_attr->rwq_ind_tbl->log_ind_tbl_size << 24);
558
559 if ((ucmd->rx_hash_function == MLX4_IB_RX_HASH_FUNC_TOEPLITZ) &&
560 (dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS_TOP)) {
561 memcpy(rss_ctx->rss_key, ucmd->rx_hash_key,
562 MLX4_EN_RSS_KEY_SIZE);
563 } else {
564 pr_debug("RX Hash function is not supported\n");
565 return (-EOPNOTSUPP);
566 }
567
568 if (ucmd->rx_hash_fields_mask & ~(u64)(MLX4_IB_RX_HASH_SRC_IPV4 |
569 MLX4_IB_RX_HASH_DST_IPV4 |
570 MLX4_IB_RX_HASH_SRC_IPV6 |
571 MLX4_IB_RX_HASH_DST_IPV6 |
572 MLX4_IB_RX_HASH_SRC_PORT_TCP |
573 MLX4_IB_RX_HASH_DST_PORT_TCP |
574 MLX4_IB_RX_HASH_SRC_PORT_UDP |
575 MLX4_IB_RX_HASH_DST_PORT_UDP |
576 MLX4_IB_RX_HASH_INNER)) {
577 pr_debug("RX Hash fields_mask has unsupported mask (0x%llx)\n",
578 ucmd->rx_hash_fields_mask);
579 return (-EOPNOTSUPP);
580 }
581
582 if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_IPV4) &&
583 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_IPV4)) {
584 rss_ctx->flags = MLX4_RSS_IPV4;
585 } else if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_IPV4) ||
586 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_IPV4)) {
587 pr_debug("RX Hash fields_mask is not supported - both IPv4 SRC and DST must be set\n");
588 return (-EOPNOTSUPP);
589 }
590
591 if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_IPV6) &&
592 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_IPV6)) {
593 rss_ctx->flags |= MLX4_RSS_IPV6;
594 } else if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_IPV6) ||
595 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_IPV6)) {
596 pr_debug("RX Hash fields_mask is not supported - both IPv6 SRC and DST must be set\n");
597 return (-EOPNOTSUPP);
598 }
599
600 if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_PORT_UDP) &&
601 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_PORT_UDP)) {
602 if (!(dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
603 pr_debug("RX Hash fields_mask for UDP is not supported\n");
604 return (-EOPNOTSUPP);
605 }
606
607 if (rss_ctx->flags & MLX4_RSS_IPV4)
608 rss_ctx->flags |= MLX4_RSS_UDP_IPV4;
609 if (rss_ctx->flags & MLX4_RSS_IPV6)
610 rss_ctx->flags |= MLX4_RSS_UDP_IPV6;
611 if (!(rss_ctx->flags & (MLX4_RSS_IPV6 | MLX4_RSS_IPV4))) {
612 pr_debug("RX Hash fields_mask is not supported - UDP must be set with IPv4 or IPv6\n");
613 return (-EOPNOTSUPP);
614 }
615 } else if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_PORT_UDP) ||
616 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_PORT_UDP)) {
617 pr_debug("RX Hash fields_mask is not supported - both UDP SRC and DST must be set\n");
618 return (-EOPNOTSUPP);
619 }
620
621 if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_PORT_TCP) &&
622 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_PORT_TCP)) {
623 if (rss_ctx->flags & MLX4_RSS_IPV4)
624 rss_ctx->flags |= MLX4_RSS_TCP_IPV4;
625 if (rss_ctx->flags & MLX4_RSS_IPV6)
626 rss_ctx->flags |= MLX4_RSS_TCP_IPV6;
627 if (!(rss_ctx->flags & (MLX4_RSS_IPV6 | MLX4_RSS_IPV4))) {
628 pr_debug("RX Hash fields_mask is not supported - TCP must be set with IPv4 or IPv6\n");
629 return (-EOPNOTSUPP);
630 }
631 } else if ((ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_SRC_PORT_TCP) ||
632 (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_DST_PORT_TCP)) {
633 pr_debug("RX Hash fields_mask is not supported - both TCP SRC and DST must be set\n");
634 return (-EOPNOTSUPP);
635 }
636
637 if (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_INNER) {
638 if (dev->dev->caps.tunnel_offload_mode ==
639 MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
640 /*
641 * Hash according to inner headers if exist, otherwise
642 * according to outer headers.
643 */
644 rss_ctx->flags |= MLX4_RSS_BY_INNER_HEADERS_IPONLY;
645 } else {
646 pr_debug("RSS Hash for inner headers isn't supported\n");
647 return (-EOPNOTSUPP);
648 }
649 }
650
651 return 0;
652 }
653
654 static int create_qp_rss(struct mlx4_ib_dev *dev,
655 struct ib_qp_init_attr *init_attr,
656 struct mlx4_ib_create_qp_rss *ucmd,
657 struct mlx4_ib_qp *qp)
658 {
659 int qpn;
660 int err;
661
662 qp->mqp.usage = MLX4_RES_USAGE_USER_VERBS;
663
664 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn, 0, qp->mqp.usage);
665 if (err)
666 return err;
667
668 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp);
669 if (err)
670 goto err_qpn;
671
672 INIT_LIST_HEAD(&qp->gid_list);
673 INIT_LIST_HEAD(&qp->steering_rules);
674
675 qp->mlx4_ib_qp_type = MLX4_IB_QPT_RAW_PACKET;
676 qp->state = IB_QPS_RESET;
677
678 /* Set dummy send resources to be compatible with HV and PRM */
679 qp->sq_no_prefetch = 1;
680 qp->sq.wqe_cnt = 1;
681 qp->sq.wqe_shift = MLX4_IB_MIN_SQ_STRIDE;
682 qp->buf_size = qp->sq.wqe_cnt << MLX4_IB_MIN_SQ_STRIDE;
683 qp->mtt = (to_mqp(
684 (struct ib_qp *)init_attr->rwq_ind_tbl->ind_tbl[0]))->mtt;
685
686 qp->rss_ctx = kzalloc(sizeof(*qp->rss_ctx), GFP_KERNEL);
687 if (!qp->rss_ctx) {
688 err = -ENOMEM;
689 goto err_qp_alloc;
690 }
691
692 err = set_qp_rss(dev, qp->rss_ctx, init_attr, ucmd);
693 if (err)
694 goto err;
695
696 return 0;
697
698 err:
699 kfree(qp->rss_ctx);
700
701 err_qp_alloc:
702 mlx4_qp_remove(dev->dev, &qp->mqp);
703 mlx4_qp_free(dev->dev, &qp->mqp);
704
705 err_qpn:
706 mlx4_qp_release_range(dev->dev, qpn, 1);
707 return err;
708 }
709
710 static int _mlx4_ib_create_qp_rss(struct ib_pd *pd, struct mlx4_ib_qp *qp,
711 struct ib_qp_init_attr *init_attr,
712 struct ib_udata *udata)
713 {
714 struct mlx4_ib_create_qp_rss ucmd = {};
715 size_t required_cmd_sz;
716 int err;
717
718 if (!udata) {
719 pr_debug("RSS QP with NULL udata\n");
720 return -EINVAL;
721 }
722
723 if (udata->outlen)
724 return -EOPNOTSUPP;
725
726 required_cmd_sz = offsetof(typeof(ucmd), reserved1) +
727 sizeof(ucmd.reserved1);
728 if (udata->inlen < required_cmd_sz) {
729 pr_debug("invalid inlen\n");
730 return -EINVAL;
731 }
732
733 if (ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen))) {
734 pr_debug("copy failed\n");
735 return -EFAULT;
736 }
737
738 if (memchr_inv(ucmd.reserved, 0, sizeof(ucmd.reserved)))
739 return -EOPNOTSUPP;
740
741 if (ucmd.comp_mask || ucmd.reserved1)
742 return -EOPNOTSUPP;
743
744 if (udata->inlen > sizeof(ucmd) &&
745 !ib_is_udata_cleared(udata, sizeof(ucmd),
746 udata->inlen - sizeof(ucmd))) {
747 pr_debug("inlen is not supported\n");
748 return -EOPNOTSUPP;
749 }
750
751 if (init_attr->qp_type != IB_QPT_RAW_PACKET) {
752 pr_debug("RSS QP with unsupported QP type %d\n",
753 init_attr->qp_type);
754 return -EOPNOTSUPP;
755 }
756
757 if (init_attr->create_flags) {
758 pr_debug("RSS QP doesn't support create flags\n");
759 return -EOPNOTSUPP;
760 }
761
762 if (init_attr->send_cq || init_attr->cap.max_send_wr) {
763 pr_debug("RSS QP with unsupported send attributes\n");
764 return -EOPNOTSUPP;
765 }
766
767 qp->pri.vid = 0xFFFF;
768 qp->alt.vid = 0xFFFF;
769
770 err = create_qp_rss(to_mdev(pd->device), init_attr, &ucmd, qp);
771 if (err)
772 return err;
773
774 qp->ibqp.qp_num = qp->mqp.qpn;
775 return 0;
776 }
777
778 /*
779 * This function allocates a WQN from a range which is consecutive and aligned
780 * to its size. In case the range is full, then it creates a new range and
781 * allocates WQN from it. The new range will be used for following allocations.
782 */
783 static int mlx4_ib_alloc_wqn(struct mlx4_ib_ucontext *context,
784 struct mlx4_ib_qp *qp, int range_size, int *wqn)
785 {
786 struct mlx4_ib_dev *dev = to_mdev(context->ibucontext.device);
787 struct mlx4_wqn_range *range;
788 int err = 0;
789
790 mutex_lock(&context->wqn_ranges_mutex);
791
792 range = list_first_entry_or_null(&context->wqn_ranges_list,
793 struct mlx4_wqn_range, list);
794
795 if (!range || (range->refcount == range->size) || range->dirty) {
796 range = kzalloc(sizeof(*range), GFP_KERNEL);
797 if (!range) {
798 err = -ENOMEM;
799 goto out;
800 }
801
802 err = mlx4_qp_reserve_range(dev->dev, range_size,
803 range_size, &range->base_wqn, 0,
804 qp->mqp.usage);
805 if (err) {
806 kfree(range);
807 goto out;
808 }
809
810 range->size = range_size;
811 list_add(&range->list, &context->wqn_ranges_list);
812 } else if (range_size != 1) {
813 /*
814 * Requesting a new range (>1) when last range is still open, is
815 * not valid.
816 */
817 err = -EINVAL;
818 goto out;
819 }
820
821 qp->wqn_range = range;
822
823 *wqn = range->base_wqn + range->refcount;
824
825 range->refcount++;
826
827 out:
828 mutex_unlock(&context->wqn_ranges_mutex);
829
830 return err;
831 }
832
833 static void mlx4_ib_release_wqn(struct mlx4_ib_ucontext *context,
834 struct mlx4_ib_qp *qp, bool dirty_release)
835 {
836 struct mlx4_ib_dev *dev = to_mdev(context->ibucontext.device);
837 struct mlx4_wqn_range *range;
838
839 mutex_lock(&context->wqn_ranges_mutex);
840
841 range = qp->wqn_range;
842
843 range->refcount--;
844 if (!range->refcount) {
845 mlx4_qp_release_range(dev->dev, range->base_wqn,
846 range->size);
847 list_del(&range->list);
848 kfree(range);
849 } else if (dirty_release) {
850 /*
851 * A range which one of its WQNs is destroyed, won't be able to be
852 * reused for further WQN allocations.
853 * The next created WQ will allocate a new range.
854 */
855 range->dirty = true;
856 }
857
858 mutex_unlock(&context->wqn_ranges_mutex);
859 }
860
861 static int create_rq(struct ib_pd *pd, struct ib_qp_init_attr *init_attr,
862 struct ib_udata *udata, struct mlx4_ib_qp *qp)
863 {
864 struct mlx4_ib_dev *dev = to_mdev(pd->device);
865 int qpn;
866 int err;
867 struct mlx4_ib_ucontext *context = rdma_udata_to_drv_context(
868 udata, struct mlx4_ib_ucontext, ibucontext);
869 struct mlx4_ib_cq *mcq;
870 unsigned long flags;
871 int range_size;
872 struct mlx4_ib_create_wq wq;
873 size_t copy_len;
874 int shift;
875 int n;
876
877 qp->mlx4_ib_qp_type = MLX4_IB_QPT_RAW_PACKET;
878
879 spin_lock_init(&qp->sq.lock);
880 spin_lock_init(&qp->rq.lock);
881 INIT_LIST_HEAD(&qp->gid_list);
882 INIT_LIST_HEAD(&qp->steering_rules);
883
884 qp->state = IB_QPS_RESET;
885
886 copy_len = min(sizeof(struct mlx4_ib_create_wq), udata->inlen);
887
888 if (ib_copy_from_udata(&wq, udata, copy_len)) {
889 err = -EFAULT;
890 goto err;
891 }
892
893 if (wq.comp_mask || wq.reserved[0] || wq.reserved[1] ||
894 wq.reserved[2]) {
895 pr_debug("user command isn't supported\n");
896 err = -EOPNOTSUPP;
897 goto err;
898 }
899
900 if (wq.log_range_size > ilog2(dev->dev->caps.max_rss_tbl_sz)) {
901 pr_debug("WQN range size must be equal or smaller than %d\n",
902 dev->dev->caps.max_rss_tbl_sz);
903 err = -EOPNOTSUPP;
904 goto err;
905 }
906 range_size = 1 << wq.log_range_size;
907
908 if (init_attr->create_flags & IB_QP_CREATE_SCATTER_FCS)
909 qp->flags |= MLX4_IB_QP_SCATTER_FCS;
910
911 err = set_rq_size(dev, &init_attr->cap, true, true, qp, qp->inl_recv_sz);
912 if (err)
913 goto err;
914
915 qp->sq_no_prefetch = 1;
916 qp->sq.wqe_cnt = 1;
917 qp->sq.wqe_shift = MLX4_IB_MIN_SQ_STRIDE;
918 qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) +
919 (qp->sq.wqe_cnt << qp->sq.wqe_shift);
920
921 qp->umem = ib_umem_get(pd->device, wq.buf_addr, qp->buf_size, 0);
922 if (IS_ERR(qp->umem)) {
923 err = PTR_ERR(qp->umem);
924 goto err;
925 }
926
927 shift = mlx4_ib_umem_calc_optimal_mtt_size(qp->umem, 0, &n);
928 err = mlx4_mtt_init(dev->dev, n, shift, &qp->mtt);
929
930 if (err)
931 goto err_buf;
932
933 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
934 if (err)
935 goto err_mtt;
936
937 err = mlx4_ib_db_map_user(udata, wq.db_addr, &qp->db);
938 if (err)
939 goto err_mtt;
940 qp->mqp.usage = MLX4_RES_USAGE_USER_VERBS;
941
942 err = mlx4_ib_alloc_wqn(context, qp, range_size, &qpn);
943 if (err)
944 goto err_wrid;
945
946 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp);
947 if (err)
948 goto err_qpn;
949
950 /*
951 * Hardware wants QPN written in big-endian order (after
952 * shifting) for send doorbell. Precompute this value to save
953 * a little bit when posting sends.
954 */
955 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
956
957 qp->mqp.event = mlx4_ib_wq_event;
958
959 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags);
960 mlx4_ib_lock_cqs(to_mcq(init_attr->send_cq),
961 to_mcq(init_attr->recv_cq));
962 /* Maintain device to QPs access, needed for further handling
963 * via reset flow
964 */
965 list_add_tail(&qp->qps_list, &dev->qp_list);
966 /* Maintain CQ to QPs access, needed for further handling
967 * via reset flow
968 */
969 mcq = to_mcq(init_attr->send_cq);
970 list_add_tail(&qp->cq_send_list, &mcq->send_qp_list);
971 mcq = to_mcq(init_attr->recv_cq);
972 list_add_tail(&qp->cq_recv_list, &mcq->recv_qp_list);
973 mlx4_ib_unlock_cqs(to_mcq(init_attr->send_cq),
974 to_mcq(init_attr->recv_cq));
975 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags);
976 return 0;
977
978 err_qpn:
979 mlx4_ib_release_wqn(context, qp, 0);
980 err_wrid:
981 mlx4_ib_db_unmap_user(context, &qp->db);
982
983 err_mtt:
984 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
985 err_buf:
986 ib_umem_release(qp->umem);
987 err:
988 return err;
989 }
990
991 static int create_qp_common(struct ib_pd *pd, struct ib_qp_init_attr *init_attr,
992 struct ib_udata *udata, int sqpn,
993 struct mlx4_ib_qp *qp)
994 {
995 struct mlx4_ib_dev *dev = to_mdev(pd->device);
996 int qpn;
997 int err;
998 struct mlx4_ib_ucontext *context = rdma_udata_to_drv_context(
999 udata, struct mlx4_ib_ucontext, ibucontext);
1000 enum mlx4_ib_qp_type qp_type = (enum mlx4_ib_qp_type) init_attr->qp_type;
1001 struct mlx4_ib_cq *mcq;
1002 unsigned long flags;
1003
1004 /* When tunneling special qps, we use a plain UD qp */
1005 if (sqpn) {
1006 if (mlx4_is_mfunc(dev->dev) &&
1007 (!mlx4_is_master(dev->dev) ||
1008 !(init_attr->create_flags & MLX4_IB_SRIOV_SQP))) {
1009 if (init_attr->qp_type == IB_QPT_GSI)
1010 qp_type = MLX4_IB_QPT_PROXY_GSI;
1011 else {
1012 if (mlx4_is_master(dev->dev) ||
1013 qp0_enabled_vf(dev->dev, sqpn))
1014 qp_type = MLX4_IB_QPT_PROXY_SMI_OWNER;
1015 else
1016 qp_type = MLX4_IB_QPT_PROXY_SMI;
1017 }
1018 }
1019 qpn = sqpn;
1020 /* add extra sg entry for tunneling */
1021 init_attr->cap.max_recv_sge++;
1022 } else if (init_attr->create_flags & MLX4_IB_SRIOV_TUNNEL_QP) {
1023 struct mlx4_ib_qp_tunnel_init_attr *tnl_init =
1024 container_of(init_attr,
1025 struct mlx4_ib_qp_tunnel_init_attr, init_attr);
1026 if ((tnl_init->proxy_qp_type != IB_QPT_SMI &&
1027 tnl_init->proxy_qp_type != IB_QPT_GSI) ||
1028 !mlx4_is_master(dev->dev))
1029 return -EINVAL;
1030 if (tnl_init->proxy_qp_type == IB_QPT_GSI)
1031 qp_type = MLX4_IB_QPT_TUN_GSI;
1032 else if (tnl_init->slave == mlx4_master_func_num(dev->dev) ||
1033 mlx4_vf_smi_enabled(dev->dev, tnl_init->slave,
1034 tnl_init->port))
1035 qp_type = MLX4_IB_QPT_TUN_SMI_OWNER;
1036 else
1037 qp_type = MLX4_IB_QPT_TUN_SMI;
1038 /* we are definitely in the PPF here, since we are creating
1039 * tunnel QPs. base_tunnel_sqpn is therefore valid. */
1040 qpn = dev->dev->phys_caps.base_tunnel_sqpn + 8 * tnl_init->slave
1041 + tnl_init->proxy_qp_type * 2 + tnl_init->port - 1;
1042 sqpn = qpn;
1043 }
1044
1045 if (init_attr->qp_type == IB_QPT_SMI ||
1046 init_attr->qp_type == IB_QPT_GSI || qp_type == MLX4_IB_QPT_SMI ||
1047 qp_type == MLX4_IB_QPT_GSI ||
1048 (qp_type & (MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_SMI_OWNER |
1049 MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER))) {
1050 qp->sqp = kzalloc(sizeof(struct mlx4_ib_sqp), GFP_KERNEL);
1051 if (!qp->sqp)
1052 return -ENOMEM;
1053 }
1054
1055 qp->mlx4_ib_qp_type = qp_type;
1056
1057 spin_lock_init(&qp->sq.lock);
1058 spin_lock_init(&qp->rq.lock);
1059 INIT_LIST_HEAD(&qp->gid_list);
1060 INIT_LIST_HEAD(&qp->steering_rules);
1061
1062 qp->state = IB_QPS_RESET;
1063 if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
1064 qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
1065
1066 if (udata) {
1067 struct mlx4_ib_create_qp ucmd;
1068 size_t copy_len;
1069 int shift;
1070 int n;
1071
1072 copy_len = sizeof(struct mlx4_ib_create_qp);
1073
1074 if (ib_copy_from_udata(&ucmd, udata, copy_len)) {
1075 err = -EFAULT;
1076 goto err;
1077 }
1078
1079 qp->inl_recv_sz = ucmd.inl_recv_sz;
1080
1081 if (init_attr->create_flags & IB_QP_CREATE_SCATTER_FCS) {
1082 if (!(dev->dev->caps.flags &
1083 MLX4_DEV_CAP_FLAG_FCS_KEEP)) {
1084 pr_debug("scatter FCS is unsupported\n");
1085 err = -EOPNOTSUPP;
1086 goto err;
1087 }
1088
1089 qp->flags |= MLX4_IB_QP_SCATTER_FCS;
1090 }
1091
1092 err = set_rq_size(dev, &init_attr->cap, udata,
1093 qp_has_rq(init_attr), qp, qp->inl_recv_sz);
1094 if (err)
1095 goto err;
1096
1097 qp->sq_no_prefetch = ucmd.sq_no_prefetch;
1098
1099 err = set_user_sq_size(dev, qp, &ucmd);
1100 if (err)
1101 goto err;
1102
1103 qp->umem =
1104 ib_umem_get(pd->device, ucmd.buf_addr, qp->buf_size, 0);
1105 if (IS_ERR(qp->umem)) {
1106 err = PTR_ERR(qp->umem);
1107 goto err;
1108 }
1109
1110 shift = mlx4_ib_umem_calc_optimal_mtt_size(qp->umem, 0, &n);
1111 err = mlx4_mtt_init(dev->dev, n, shift, &qp->mtt);
1112
1113 if (err)
1114 goto err_buf;
1115
1116 err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
1117 if (err)
1118 goto err_mtt;
1119
1120 if (qp_has_rq(init_attr)) {
1121 err = mlx4_ib_db_map_user(udata, ucmd.db_addr, &qp->db);
1122 if (err)
1123 goto err_mtt;
1124 }
1125 qp->mqp.usage = MLX4_RES_USAGE_USER_VERBS;
1126 } else {
1127 err = set_rq_size(dev, &init_attr->cap, udata,
1128 qp_has_rq(init_attr), qp, 0);
1129 if (err)
1130 goto err;
1131
1132 qp->sq_no_prefetch = 0;
1133
1134 if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
1135 qp->flags |= MLX4_IB_QP_LSO;
1136
1137 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
1138 if (dev->steering_support ==
1139 MLX4_STEERING_MODE_DEVICE_MANAGED)
1140 qp->flags |= MLX4_IB_QP_NETIF;
1141 else {
1142 err = -EINVAL;
1143 goto err;
1144 }
1145 }
1146
1147 err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
1148 if (err)
1149 goto err;
1150
1151 if (qp_has_rq(init_attr)) {
1152 err = mlx4_db_alloc(dev->dev, &qp->db, 0);
1153 if (err)
1154 goto err;
1155
1156 *qp->db.db = 0;
1157 }
1158
1159 if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2,
1160 &qp->buf)) {
1161 err = -ENOMEM;
1162 goto err_db;
1163 }
1164
1165 err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
1166 &qp->mtt);
1167 if (err)
1168 goto err_buf;
1169
1170 err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf);
1171 if (err)
1172 goto err_mtt;
1173
1174 qp->sq.wrid = kvmalloc_array(qp->sq.wqe_cnt,
1175 sizeof(u64), GFP_KERNEL);
1176 qp->rq.wrid = kvmalloc_array(qp->rq.wqe_cnt,
1177 sizeof(u64), GFP_KERNEL);
1178 if (!qp->sq.wrid || !qp->rq.wrid) {
1179 err = -ENOMEM;
1180 goto err_wrid;
1181 }
1182 qp->mqp.usage = MLX4_RES_USAGE_DRIVER;
1183 }
1184
1185 if (sqpn) {
1186 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
1187 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
1188 if (alloc_proxy_bufs(pd->device, qp)) {
1189 err = -ENOMEM;
1190 goto err_wrid;
1191 }
1192 }
1193 } else {
1194 /* Raw packet QPNs may not have bits 6,7 set in their qp_num;
1195 * otherwise, the WQE BlueFlame setup flow wrongly causes
1196 * VLAN insertion. */
1197 if (init_attr->qp_type == IB_QPT_RAW_PACKET)
1198 err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn,
1199 (init_attr->cap.max_send_wr ?
1200 MLX4_RESERVE_ETH_BF_QP : 0) |
1201 (init_attr->cap.max_recv_wr ?
1202 MLX4_RESERVE_A0_QP : 0),
1203 qp->mqp.usage);
1204 else
1205 if (qp->flags & MLX4_IB_QP_NETIF)
1206 err = mlx4_ib_steer_qp_alloc(dev, 1, &qpn);
1207 else
1208 err = mlx4_qp_reserve_range(dev->dev, 1, 1,
1209 &qpn, 0, qp->mqp.usage);
1210 if (err)
1211 goto err_proxy;
1212 }
1213
1214 if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)
1215 qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
1216
1217 err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp);
1218 if (err)
1219 goto err_qpn;
1220
1221 if (init_attr->qp_type == IB_QPT_XRC_TGT)
1222 qp->mqp.qpn |= (1 << 23);
1223
1224 /*
1225 * Hardware wants QPN written in big-endian order (after
1226 * shifting) for send doorbell. Precompute this value to save
1227 * a little bit when posting sends.
1228 */
1229 qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
1230
1231 qp->mqp.event = mlx4_ib_qp_event;
1232
1233 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags);
1234 mlx4_ib_lock_cqs(to_mcq(init_attr->send_cq),
1235 to_mcq(init_attr->recv_cq));
1236 /* Maintain device to QPs access, needed for further handling
1237 * via reset flow
1238 */
1239 list_add_tail(&qp->qps_list, &dev->qp_list);
1240 /* Maintain CQ to QPs access, needed for further handling
1241 * via reset flow
1242 */
1243 mcq = to_mcq(init_attr->send_cq);
1244 list_add_tail(&qp->cq_send_list, &mcq->send_qp_list);
1245 mcq = to_mcq(init_attr->recv_cq);
1246 list_add_tail(&qp->cq_recv_list, &mcq->recv_qp_list);
1247 mlx4_ib_unlock_cqs(to_mcq(init_attr->send_cq),
1248 to_mcq(init_attr->recv_cq));
1249 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags);
1250 return 0;
1251
1252 err_qpn:
1253 if (!sqpn) {
1254 if (qp->flags & MLX4_IB_QP_NETIF)
1255 mlx4_ib_steer_qp_free(dev, qpn, 1);
1256 else
1257 mlx4_qp_release_range(dev->dev, qpn, 1);
1258 }
1259 err_proxy:
1260 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
1261 free_proxy_bufs(pd->device, qp);
1262 err_wrid:
1263 if (udata) {
1264 if (qp_has_rq(init_attr))
1265 mlx4_ib_db_unmap_user(context, &qp->db);
1266 } else {
1267 kvfree(qp->sq.wrid);
1268 kvfree(qp->rq.wrid);
1269 }
1270
1271 err_mtt:
1272 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
1273
1274 err_buf:
1275 if (!qp->umem)
1276 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
1277 ib_umem_release(qp->umem);
1278
1279 err_db:
1280 if (!udata && qp_has_rq(init_attr))
1281 mlx4_db_free(dev->dev, &qp->db);
1282
1283 err:
1284 kfree(qp->sqp);
1285 return err;
1286 }
1287
1288 static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
1289 {
1290 switch (state) {
1291 case IB_QPS_RESET: return MLX4_QP_STATE_RST;
1292 case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
1293 case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
1294 case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
1295 case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
1296 case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
1297 case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
1298 default: return -1;
1299 }
1300 }
1301
1302 static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
1303 __acquires(&send_cq->lock) __acquires(&recv_cq->lock)
1304 {
1305 if (send_cq == recv_cq) {
1306 spin_lock(&send_cq->lock);
1307 __acquire(&recv_cq->lock);
1308 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
1309 spin_lock(&send_cq->lock);
1310 spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
1311 } else {
1312 spin_lock(&recv_cq->lock);
1313 spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
1314 }
1315 }
1316
1317 static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
1318 __releases(&send_cq->lock) __releases(&recv_cq->lock)
1319 {
1320 if (send_cq == recv_cq) {
1321 __release(&recv_cq->lock);
1322 spin_unlock(&send_cq->lock);
1323 } else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
1324 spin_unlock(&recv_cq->lock);
1325 spin_unlock(&send_cq->lock);
1326 } else {
1327 spin_unlock(&send_cq->lock);
1328 spin_unlock(&recv_cq->lock);
1329 }
1330 }
1331
1332 static void del_gid_entries(struct mlx4_ib_qp *qp)
1333 {
1334 struct mlx4_ib_gid_entry *ge, *tmp;
1335
1336 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
1337 list_del(&ge->list);
1338 kfree(ge);
1339 }
1340 }
1341
1342 static struct mlx4_ib_pd *get_pd(struct mlx4_ib_qp *qp)
1343 {
1344 if (qp->ibqp.qp_type == IB_QPT_XRC_TGT)
1345 return to_mpd(to_mxrcd(qp->ibqp.xrcd)->pd);
1346 else
1347 return to_mpd(qp->ibqp.pd);
1348 }
1349
1350 static void get_cqs(struct mlx4_ib_qp *qp, enum mlx4_ib_source_type src,
1351 struct mlx4_ib_cq **send_cq, struct mlx4_ib_cq **recv_cq)
1352 {
1353 switch (qp->ibqp.qp_type) {
1354 case IB_QPT_XRC_TGT:
1355 *send_cq = to_mcq(to_mxrcd(qp->ibqp.xrcd)->cq);
1356 *recv_cq = *send_cq;
1357 break;
1358 case IB_QPT_XRC_INI:
1359 *send_cq = to_mcq(qp->ibqp.send_cq);
1360 *recv_cq = *send_cq;
1361 break;
1362 default:
1363 *recv_cq = (src == MLX4_IB_QP_SRC) ? to_mcq(qp->ibqp.recv_cq) :
1364 to_mcq(qp->ibwq.cq);
1365 *send_cq = (src == MLX4_IB_QP_SRC) ? to_mcq(qp->ibqp.send_cq) :
1366 *recv_cq;
1367 break;
1368 }
1369 }
1370
1371 static void destroy_qp_rss(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1372 {
1373 if (qp->state != IB_QPS_RESET) {
1374 int i;
1375
1376 for (i = 0; i < (1 << qp->ibqp.rwq_ind_tbl->log_ind_tbl_size);
1377 i++) {
1378 struct ib_wq *ibwq = qp->ibqp.rwq_ind_tbl->ind_tbl[i];
1379 struct mlx4_ib_qp *wq = to_mqp((struct ib_qp *)ibwq);
1380
1381 mutex_lock(&wq->mutex);
1382
1383 wq->rss_usecnt--;
1384
1385 mutex_unlock(&wq->mutex);
1386 }
1387
1388 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
1389 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
1390 pr_warn("modify QP %06x to RESET failed.\n",
1391 qp->mqp.qpn);
1392 }
1393
1394 mlx4_qp_remove(dev->dev, &qp->mqp);
1395 mlx4_qp_free(dev->dev, &qp->mqp);
1396 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
1397 del_gid_entries(qp);
1398 }
1399
1400 static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
1401 enum mlx4_ib_source_type src,
1402 struct ib_udata *udata)
1403 {
1404 struct mlx4_ib_cq *send_cq, *recv_cq;
1405 unsigned long flags;
1406
1407 if (qp->state != IB_QPS_RESET) {
1408 if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
1409 MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
1410 pr_warn("modify QP %06x to RESET failed.\n",
1411 qp->mqp.qpn);
1412 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
1413 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
1414 qp->pri.smac = 0;
1415 qp->pri.smac_port = 0;
1416 }
1417 if (qp->alt.smac) {
1418 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
1419 qp->alt.smac = 0;
1420 }
1421 if (qp->pri.vid < 0x1000) {
1422 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
1423 qp->pri.vid = 0xFFFF;
1424 qp->pri.candidate_vid = 0xFFFF;
1425 qp->pri.update_vid = 0;
1426 }
1427 if (qp->alt.vid < 0x1000) {
1428 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
1429 qp->alt.vid = 0xFFFF;
1430 qp->alt.candidate_vid = 0xFFFF;
1431 qp->alt.update_vid = 0;
1432 }
1433 }
1434
1435 get_cqs(qp, src, &send_cq, &recv_cq);
1436
1437 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags);
1438 mlx4_ib_lock_cqs(send_cq, recv_cq);
1439
1440 /* del from lists under both locks above to protect reset flow paths */
1441 list_del(&qp->qps_list);
1442 list_del(&qp->cq_send_list);
1443 list_del(&qp->cq_recv_list);
1444 if (!udata) {
1445 __mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
1446 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
1447 if (send_cq != recv_cq)
1448 __mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
1449 }
1450
1451 mlx4_qp_remove(dev->dev, &qp->mqp);
1452
1453 mlx4_ib_unlock_cqs(send_cq, recv_cq);
1454 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags);
1455
1456 mlx4_qp_free(dev->dev, &qp->mqp);
1457
1458 if (!is_sqp(dev, qp) && !is_tunnel_qp(dev, qp)) {
1459 if (qp->flags & MLX4_IB_QP_NETIF)
1460 mlx4_ib_steer_qp_free(dev, qp->mqp.qpn, 1);
1461 else if (src == MLX4_IB_RWQ_SRC)
1462 mlx4_ib_release_wqn(
1463 rdma_udata_to_drv_context(
1464 udata,
1465 struct mlx4_ib_ucontext,
1466 ibucontext),
1467 qp, 1);
1468 else
1469 mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
1470 }
1471
1472 mlx4_mtt_cleanup(dev->dev, &qp->mtt);
1473
1474 if (udata) {
1475 if (qp->rq.wqe_cnt) {
1476 struct mlx4_ib_ucontext *mcontext =
1477 rdma_udata_to_drv_context(
1478 udata,
1479 struct mlx4_ib_ucontext,
1480 ibucontext);
1481
1482 mlx4_ib_db_unmap_user(mcontext, &qp->db);
1483 }
1484 } else {
1485 kvfree(qp->sq.wrid);
1486 kvfree(qp->rq.wrid);
1487 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
1488 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
1489 free_proxy_bufs(&dev->ib_dev, qp);
1490 mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
1491 if (qp->rq.wqe_cnt)
1492 mlx4_db_free(dev->dev, &qp->db);
1493 }
1494 ib_umem_release(qp->umem);
1495
1496 del_gid_entries(qp);
1497 }
1498
1499 static u32 get_sqp_num(struct mlx4_ib_dev *dev, struct ib_qp_init_attr *attr)
1500 {
1501 /* Native or PPF */
1502 if (!mlx4_is_mfunc(dev->dev) ||
1503 (mlx4_is_master(dev->dev) &&
1504 attr->create_flags & MLX4_IB_SRIOV_SQP)) {
1505 return dev->dev->phys_caps.base_sqpn +
1506 (attr->qp_type == IB_QPT_SMI ? 0 : 2) +
1507 attr->port_num - 1;
1508 }
1509 /* PF or VF -- creating proxies */
1510 if (attr->qp_type == IB_QPT_SMI)
1511 return dev->dev->caps.spec_qps[attr->port_num - 1].qp0_proxy;
1512 else
1513 return dev->dev->caps.spec_qps[attr->port_num - 1].qp1_proxy;
1514 }
1515
1516 static int _mlx4_ib_create_qp(struct ib_pd *pd, struct mlx4_ib_qp *qp,
1517 struct ib_qp_init_attr *init_attr,
1518 struct ib_udata *udata)
1519 {
1520 int err;
1521 int sup_u_create_flags = MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK;
1522 u16 xrcdn = 0;
1523
1524 if (init_attr->rwq_ind_tbl)
1525 return _mlx4_ib_create_qp_rss(pd, qp, init_attr, udata);
1526
1527 /*
1528 * We only support LSO, vendor flag1, and multicast loopback blocking,
1529 * and only for kernel UD QPs.
1530 */
1531 if (init_attr->create_flags & ~(MLX4_IB_QP_LSO |
1532 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK |
1533 MLX4_IB_SRIOV_TUNNEL_QP |
1534 MLX4_IB_SRIOV_SQP |
1535 MLX4_IB_QP_NETIF |
1536 MLX4_IB_QP_CREATE_ROCE_V2_GSI))
1537 return -EOPNOTSUPP;
1538
1539 if (init_attr->create_flags & IB_QP_CREATE_NETIF_QP) {
1540 if (init_attr->qp_type != IB_QPT_UD)
1541 return -EINVAL;
1542 }
1543
1544 if (init_attr->create_flags) {
1545 if (udata && init_attr->create_flags & ~(sup_u_create_flags))
1546 return -EINVAL;
1547
1548 if ((init_attr->create_flags & ~(MLX4_IB_SRIOV_SQP |
1549 MLX4_IB_QP_CREATE_ROCE_V2_GSI |
1550 MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) &&
1551 init_attr->qp_type != IB_QPT_UD) ||
1552 (init_attr->create_flags & MLX4_IB_SRIOV_SQP &&
1553 init_attr->qp_type > IB_QPT_GSI) ||
1554 (init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI &&
1555 init_attr->qp_type != IB_QPT_GSI))
1556 return -EINVAL;
1557 }
1558
1559 switch (init_attr->qp_type) {
1560 case IB_QPT_XRC_TGT:
1561 pd = to_mxrcd(init_attr->xrcd)->pd;
1562 xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
1563 init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
1564 fallthrough;
1565 case IB_QPT_XRC_INI:
1566 if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
1567 return -ENOSYS;
1568 init_attr->recv_cq = init_attr->send_cq;
1569 fallthrough;
1570 case IB_QPT_RC:
1571 case IB_QPT_UC:
1572 case IB_QPT_RAW_PACKET:
1573 case IB_QPT_UD:
1574 qp->pri.vid = 0xFFFF;
1575 qp->alt.vid = 0xFFFF;
1576 err = create_qp_common(pd, init_attr, udata, 0, qp);
1577 if (err)
1578 return err;
1579
1580 qp->ibqp.qp_num = qp->mqp.qpn;
1581 qp->xrcdn = xrcdn;
1582 break;
1583 case IB_QPT_SMI:
1584 case IB_QPT_GSI:
1585 {
1586 int sqpn;
1587
1588 if (init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI) {
1589 int res = mlx4_qp_reserve_range(to_mdev(pd->device)->dev,
1590 1, 1, &sqpn, 0,
1591 MLX4_RES_USAGE_DRIVER);
1592
1593 if (res)
1594 return res;
1595 } else {
1596 sqpn = get_sqp_num(to_mdev(pd->device), init_attr);
1597 }
1598
1599 qp->pri.vid = 0xFFFF;
1600 qp->alt.vid = 0xFFFF;
1601 err = create_qp_common(pd, init_attr, udata, sqpn, qp);
1602 if (err)
1603 return err;
1604
1605 if (init_attr->create_flags &
1606 (MLX4_IB_SRIOV_SQP | MLX4_IB_SRIOV_TUNNEL_QP))
1607 /* Internal QP created with ib_create_qp */
1608 rdma_restrack_no_track(&qp->ibqp.res);
1609
1610 qp->port = init_attr->port_num;
1611 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 :
1612 init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI ? sqpn : 1;
1613 break;
1614 }
1615 default:
1616 /* Don't support raw QPs */
1617 return -EOPNOTSUPP;
1618 }
1619 return 0;
1620 }
1621
1622 int mlx4_ib_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
1623 struct ib_udata *udata)
1624 {
1625 struct ib_device *device = ibqp->device;
1626 struct mlx4_ib_dev *dev = to_mdev(device);
1627 struct mlx4_ib_qp *qp = to_mqp(ibqp);
1628 struct ib_pd *pd = ibqp->pd;
1629 int ret;
1630
1631 mutex_init(&qp->mutex);
1632 ret = _mlx4_ib_create_qp(pd, qp, init_attr, udata);
1633 if (ret)
1634 return ret;
1635
1636 if (init_attr->qp_type == IB_QPT_GSI &&
1637 !(init_attr->create_flags & MLX4_IB_QP_CREATE_ROCE_V2_GSI)) {
1638 struct mlx4_ib_sqp *sqp = qp->sqp;
1639 int is_eth = rdma_cap_eth_ah(&dev->ib_dev, init_attr->port_num);
1640
1641 if (is_eth &&
1642 dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2) {
1643 init_attr->create_flags |= MLX4_IB_QP_CREATE_ROCE_V2_GSI;
1644 sqp->roce_v2_gsi = ib_create_qp(pd, init_attr);
1645
1646 if (IS_ERR(sqp->roce_v2_gsi)) {
1647 pr_err("Failed to create GSI QP for RoCEv2 (%ld)\n", PTR_ERR(sqp->roce_v2_gsi));
1648 sqp->roce_v2_gsi = NULL;
1649 } else {
1650 to_mqp(sqp->roce_v2_gsi)->flags |=
1651 MLX4_IB_ROCE_V2_GSI_QP;
1652 }
1653
1654 init_attr->create_flags &= ~MLX4_IB_QP_CREATE_ROCE_V2_GSI;
1655 }
1656 }
1657 return 0;
1658 }
1659
1660 static int _mlx4_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
1661 {
1662 struct mlx4_ib_dev *dev = to_mdev(qp->device);
1663 struct mlx4_ib_qp *mqp = to_mqp(qp);
1664
1665 if (is_qp0(dev, mqp))
1666 mlx4_CLOSE_PORT(dev->dev, mqp->port);
1667
1668 if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI &&
1669 dev->qp1_proxy[mqp->port - 1] == mqp) {
1670 mutex_lock(&dev->qp1_proxy_lock[mqp->port - 1]);
1671 dev->qp1_proxy[mqp->port - 1] = NULL;
1672 mutex_unlock(&dev->qp1_proxy_lock[mqp->port - 1]);
1673 }
1674
1675 if (mqp->counter_index)
1676 mlx4_ib_free_qp_counter(dev, mqp);
1677
1678 if (qp->rwq_ind_tbl) {
1679 destroy_qp_rss(dev, mqp);
1680 } else {
1681 destroy_qp_common(dev, mqp, MLX4_IB_QP_SRC, udata);
1682 }
1683
1684 kfree(mqp->sqp);
1685 return 0;
1686 }
1687
1688 int mlx4_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
1689 {
1690 struct mlx4_ib_qp *mqp = to_mqp(qp);
1691
1692 if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) {
1693 struct mlx4_ib_sqp *sqp = mqp->sqp;
1694
1695 if (sqp->roce_v2_gsi)
1696 ib_destroy_qp(sqp->roce_v2_gsi);
1697 }
1698
1699 return _mlx4_ib_destroy_qp(qp, udata);
1700 }
1701
1702 static int to_mlx4_st(struct mlx4_ib_dev *dev, enum mlx4_ib_qp_type type)
1703 {
1704 switch (type) {
1705 case MLX4_IB_QPT_RC: return MLX4_QP_ST_RC;
1706 case MLX4_IB_QPT_UC: return MLX4_QP_ST_UC;
1707 case MLX4_IB_QPT_UD: return MLX4_QP_ST_UD;
1708 case MLX4_IB_QPT_XRC_INI:
1709 case MLX4_IB_QPT_XRC_TGT: return MLX4_QP_ST_XRC;
1710 case MLX4_IB_QPT_SMI:
1711 case MLX4_IB_QPT_GSI:
1712 case MLX4_IB_QPT_RAW_PACKET: return MLX4_QP_ST_MLX;
1713
1714 case MLX4_IB_QPT_PROXY_SMI_OWNER:
1715 case MLX4_IB_QPT_TUN_SMI_OWNER: return (mlx4_is_mfunc(dev->dev) ?
1716 MLX4_QP_ST_MLX : -1);
1717 case MLX4_IB_QPT_PROXY_SMI:
1718 case MLX4_IB_QPT_TUN_SMI:
1719 case MLX4_IB_QPT_PROXY_GSI:
1720 case MLX4_IB_QPT_TUN_GSI: return (mlx4_is_mfunc(dev->dev) ?
1721 MLX4_QP_ST_UD : -1);
1722 default: return -1;
1723 }
1724 }
1725
1726 static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
1727 int attr_mask)
1728 {
1729 u8 dest_rd_atomic;
1730 u32 access_flags;
1731 u32 hw_access_flags = 0;
1732
1733 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1734 dest_rd_atomic = attr->max_dest_rd_atomic;
1735 else
1736 dest_rd_atomic = qp->resp_depth;
1737
1738 if (attr_mask & IB_QP_ACCESS_FLAGS)
1739 access_flags = attr->qp_access_flags;
1740 else
1741 access_flags = qp->atomic_rd_en;
1742
1743 if (!dest_rd_atomic)
1744 access_flags &= IB_ACCESS_REMOTE_WRITE;
1745
1746 if (access_flags & IB_ACCESS_REMOTE_READ)
1747 hw_access_flags |= MLX4_QP_BIT_RRE;
1748 if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
1749 hw_access_flags |= MLX4_QP_BIT_RAE;
1750 if (access_flags & IB_ACCESS_REMOTE_WRITE)
1751 hw_access_flags |= MLX4_QP_BIT_RWE;
1752
1753 return cpu_to_be32(hw_access_flags);
1754 }
1755
1756 static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, const struct ib_qp_attr *attr,
1757 int attr_mask)
1758 {
1759 if (attr_mask & IB_QP_PKEY_INDEX)
1760 sqp->pkey_index = attr->pkey_index;
1761 if (attr_mask & IB_QP_QKEY)
1762 sqp->qkey = attr->qkey;
1763 if (attr_mask & IB_QP_SQ_PSN)
1764 sqp->send_psn = attr->sq_psn;
1765 }
1766
1767 static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
1768 {
1769 path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
1770 }
1771
1772 static int _mlx4_set_path(struct mlx4_ib_dev *dev,
1773 const struct rdma_ah_attr *ah,
1774 u64 smac, u16 vlan_tag, struct mlx4_qp_path *path,
1775 struct mlx4_roce_smac_vlan_info *smac_info, u8 port)
1776 {
1777 int vidx;
1778 int smac_index;
1779 int err;
1780
1781 path->grh_mylmc = rdma_ah_get_path_bits(ah) & 0x7f;
1782 path->rlid = cpu_to_be16(rdma_ah_get_dlid(ah));
1783 if (rdma_ah_get_static_rate(ah)) {
1784 path->static_rate = rdma_ah_get_static_rate(ah) +
1785 MLX4_STAT_RATE_OFFSET;
1786 while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
1787 !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
1788 --path->static_rate;
1789 } else
1790 path->static_rate = 0;
1791
1792 if (rdma_ah_get_ah_flags(ah) & IB_AH_GRH) {
1793 const struct ib_global_route *grh = rdma_ah_read_grh(ah);
1794 int real_sgid_index =
1795 mlx4_ib_gid_index_to_real_index(dev, grh->sgid_attr);
1796
1797 if (real_sgid_index < 0)
1798 return real_sgid_index;
1799 if (real_sgid_index >= dev->dev->caps.gid_table_len[port]) {
1800 pr_err("sgid_index (%u) too large. max is %d\n",
1801 real_sgid_index, dev->dev->caps.gid_table_len[port] - 1);
1802 return -1;
1803 }
1804
1805 path->grh_mylmc |= 1 << 7;
1806 path->mgid_index = real_sgid_index;
1807 path->hop_limit = grh->hop_limit;
1808 path->tclass_flowlabel =
1809 cpu_to_be32((grh->traffic_class << 20) |
1810 (grh->flow_label));
1811 memcpy(path->rgid, grh->dgid.raw, 16);
1812 }
1813
1814 if (ah->type == RDMA_AH_ATTR_TYPE_ROCE) {
1815 if (!(rdma_ah_get_ah_flags(ah) & IB_AH_GRH))
1816 return -1;
1817
1818 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1819 ((port - 1) << 6) | ((rdma_ah_get_sl(ah) & 7) << 3);
1820
1821 path->feup |= MLX4_FEUP_FORCE_ETH_UP;
1822 if (vlan_tag < 0x1000) {
1823 if (smac_info->vid < 0x1000) {
1824 /* both valid vlan ids */
1825 if (smac_info->vid != vlan_tag) {
1826 /* different VIDs. unreg old and reg new */
1827 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1828 if (err)
1829 return err;
1830 smac_info->candidate_vid = vlan_tag;
1831 smac_info->candidate_vlan_index = vidx;
1832 smac_info->candidate_vlan_port = port;
1833 smac_info->update_vid = 1;
1834 path->vlan_index = vidx;
1835 } else {
1836 path->vlan_index = smac_info->vlan_index;
1837 }
1838 } else {
1839 /* no current vlan tag in qp */
1840 err = mlx4_register_vlan(dev->dev, port, vlan_tag, &vidx);
1841 if (err)
1842 return err;
1843 smac_info->candidate_vid = vlan_tag;
1844 smac_info->candidate_vlan_index = vidx;
1845 smac_info->candidate_vlan_port = port;
1846 smac_info->update_vid = 1;
1847 path->vlan_index = vidx;
1848 }
1849 path->feup |= MLX4_FVL_FORCE_ETH_VLAN;
1850 path->fl = 1 << 6;
1851 } else {
1852 /* have current vlan tag. unregister it at modify-qp success */
1853 if (smac_info->vid < 0x1000) {
1854 smac_info->candidate_vid = 0xFFFF;
1855 smac_info->update_vid = 1;
1856 }
1857 }
1858
1859 /* get smac_index for RoCE use.
1860 * If no smac was yet assigned, register one.
1861 * If one was already assigned, but the new mac differs,
1862 * unregister the old one and register the new one.
1863 */
1864 if ((!smac_info->smac && !smac_info->smac_port) ||
1865 smac_info->smac != smac) {
1866 /* register candidate now, unreg if needed, after success */
1867 smac_index = mlx4_register_mac(dev->dev, port, smac);
1868 if (smac_index >= 0) {
1869 smac_info->candidate_smac_index = smac_index;
1870 smac_info->candidate_smac = smac;
1871 smac_info->candidate_smac_port = port;
1872 } else {
1873 return -EINVAL;
1874 }
1875 } else {
1876 smac_index = smac_info->smac_index;
1877 }
1878 memcpy(path->dmac, ah->roce.dmac, 6);
1879 path->ackto = MLX4_IB_LINK_TYPE_ETH;
1880 /* put MAC table smac index for IBoE */
1881 path->grh_mylmc = (u8) (smac_index) | 0x80;
1882 } else {
1883 path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
1884 ((port - 1) << 6) | ((rdma_ah_get_sl(ah) & 0xf) << 2);
1885 }
1886
1887 return 0;
1888 }
1889
1890 static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_qp_attr *qp,
1891 enum ib_qp_attr_mask qp_attr_mask,
1892 struct mlx4_ib_qp *mqp,
1893 struct mlx4_qp_path *path, u8 port,
1894 u16 vlan_id, u8 *smac)
1895 {
1896 return _mlx4_set_path(dev, &qp->ah_attr,
1897 ether_addr_to_u64(smac),
1898 vlan_id,
1899 path, &mqp->pri, port);
1900 }
1901
1902 static int mlx4_set_alt_path(struct mlx4_ib_dev *dev,
1903 const struct ib_qp_attr *qp,
1904 enum ib_qp_attr_mask qp_attr_mask,
1905 struct mlx4_ib_qp *mqp,
1906 struct mlx4_qp_path *path, u8 port)
1907 {
1908 return _mlx4_set_path(dev, &qp->alt_ah_attr,
1909 0,
1910 0xffff,
1911 path, &mqp->alt, port);
1912 }
1913
1914 static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1915 {
1916 struct mlx4_ib_gid_entry *ge, *tmp;
1917
1918 list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
1919 if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
1920 ge->added = 1;
1921 ge->port = qp->port;
1922 }
1923 }
1924 }
1925
1926 static int handle_eth_ud_smac_index(struct mlx4_ib_dev *dev,
1927 struct mlx4_ib_qp *qp,
1928 struct mlx4_qp_context *context)
1929 {
1930 u64 u64_mac;
1931 int smac_index;
1932
1933 u64_mac = atomic64_read(&dev->iboe.mac[qp->port - 1]);
1934
1935 context->pri_path.sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE | ((qp->port - 1) << 6);
1936 if (!qp->pri.smac && !qp->pri.smac_port) {
1937 smac_index = mlx4_register_mac(dev->dev, qp->port, u64_mac);
1938 if (smac_index >= 0) {
1939 qp->pri.candidate_smac_index = smac_index;
1940 qp->pri.candidate_smac = u64_mac;
1941 qp->pri.candidate_smac_port = qp->port;
1942 context->pri_path.grh_mylmc = 0x80 | (u8) smac_index;
1943 } else {
1944 return -ENOENT;
1945 }
1946 }
1947 return 0;
1948 }
1949
1950 static int create_qp_lb_counter(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
1951 {
1952 struct counter_index *new_counter_index;
1953 int err;
1954 u32 tmp_idx;
1955
1956 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) !=
1957 IB_LINK_LAYER_ETHERNET ||
1958 !(qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) ||
1959 !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_LB_SRC_CHK))
1960 return 0;
1961
1962 err = mlx4_counter_alloc(dev->dev, &tmp_idx, MLX4_RES_USAGE_DRIVER);
1963 if (err)
1964 return err;
1965
1966 new_counter_index = kmalloc(sizeof(*new_counter_index), GFP_KERNEL);
1967 if (!new_counter_index) {
1968 mlx4_counter_free(dev->dev, tmp_idx);
1969 return -ENOMEM;
1970 }
1971
1972 new_counter_index->index = tmp_idx;
1973 new_counter_index->allocated = 1;
1974 qp->counter_index = new_counter_index;
1975
1976 mutex_lock(&dev->counters_table[qp->port - 1].mutex);
1977 list_add_tail(&new_counter_index->list,
1978 &dev->counters_table[qp->port - 1].counters_list);
1979 mutex_unlock(&dev->counters_table[qp->port - 1].mutex);
1980
1981 return 0;
1982 }
1983
1984 enum {
1985 MLX4_QPC_ROCE_MODE_1 = 0,
1986 MLX4_QPC_ROCE_MODE_2 = 2,
1987 MLX4_QPC_ROCE_MODE_UNDEFINED = 0xff
1988 };
1989
1990 static u8 gid_type_to_qpc(enum ib_gid_type gid_type)
1991 {
1992 switch (gid_type) {
1993 case IB_GID_TYPE_ROCE:
1994 return MLX4_QPC_ROCE_MODE_1;
1995 case IB_GID_TYPE_ROCE_UDP_ENCAP:
1996 return MLX4_QPC_ROCE_MODE_2;
1997 default:
1998 return MLX4_QPC_ROCE_MODE_UNDEFINED;
1999 }
2000 }
2001
2002 /*
2003 * Go over all RSS QP's childes (WQs) and apply their HW state according to
2004 * their logic state if the RSS QP is the first RSS QP associated for the WQ.
2005 */
2006 static int bringup_rss_rwqs(struct ib_rwq_ind_table *ind_tbl, u8 port_num,
2007 struct ib_udata *udata)
2008 {
2009 int err = 0;
2010 int i;
2011
2012 for (i = 0; i < (1 << ind_tbl->log_ind_tbl_size); i++) {
2013 struct ib_wq *ibwq = ind_tbl->ind_tbl[i];
2014 struct mlx4_ib_qp *wq = to_mqp((struct ib_qp *)ibwq);
2015
2016 mutex_lock(&wq->mutex);
2017
2018 /* Mlx4_ib restrictions:
2019 * WQ's is associated to a port according to the RSS QP it is
2020 * associates to.
2021 * In case the WQ is associated to a different port by another
2022 * RSS QP, return a failure.
2023 */
2024 if ((wq->rss_usecnt > 0) && (wq->port != port_num)) {
2025 err = -EINVAL;
2026 mutex_unlock(&wq->mutex);
2027 break;
2028 }
2029 wq->port = port_num;
2030 if ((wq->rss_usecnt == 0) && (ibwq->state == IB_WQS_RDY)) {
2031 err = _mlx4_ib_modify_wq(ibwq, IB_WQS_RDY, udata);
2032 if (err) {
2033 mutex_unlock(&wq->mutex);
2034 break;
2035 }
2036 }
2037 wq->rss_usecnt++;
2038
2039 mutex_unlock(&wq->mutex);
2040 }
2041
2042 if (i && err) {
2043 int j;
2044
2045 for (j = (i - 1); j >= 0; j--) {
2046 struct ib_wq *ibwq = ind_tbl->ind_tbl[j];
2047 struct mlx4_ib_qp *wq = to_mqp((struct ib_qp *)ibwq);
2048
2049 mutex_lock(&wq->mutex);
2050
2051 if ((wq->rss_usecnt == 1) &&
2052 (ibwq->state == IB_WQS_RDY))
2053 if (_mlx4_ib_modify_wq(ibwq, IB_WQS_RESET,
2054 udata))
2055 pr_warn("failed to reverse WQN=0x%06x\n",
2056 ibwq->wq_num);
2057 wq->rss_usecnt--;
2058
2059 mutex_unlock(&wq->mutex);
2060 }
2061 }
2062
2063 return err;
2064 }
2065
2066 static void bring_down_rss_rwqs(struct ib_rwq_ind_table *ind_tbl,
2067 struct ib_udata *udata)
2068 {
2069 int i;
2070
2071 for (i = 0; i < (1 << ind_tbl->log_ind_tbl_size); i++) {
2072 struct ib_wq *ibwq = ind_tbl->ind_tbl[i];
2073 struct mlx4_ib_qp *wq = to_mqp((struct ib_qp *)ibwq);
2074
2075 mutex_lock(&wq->mutex);
2076
2077 if ((wq->rss_usecnt == 1) && (ibwq->state == IB_WQS_RDY))
2078 if (_mlx4_ib_modify_wq(ibwq, IB_WQS_RESET, udata))
2079 pr_warn("failed to reverse WQN=%x\n",
2080 ibwq->wq_num);
2081 wq->rss_usecnt--;
2082
2083 mutex_unlock(&wq->mutex);
2084 }
2085 }
2086
2087 static void fill_qp_rss_context(struct mlx4_qp_context *context,
2088 struct mlx4_ib_qp *qp)
2089 {
2090 struct mlx4_rss_context *rss_context;
2091
2092 rss_context = (void *)context + offsetof(struct mlx4_qp_context,
2093 pri_path) + MLX4_RSS_OFFSET_IN_QPC_PRI_PATH;
2094
2095 rss_context->base_qpn = cpu_to_be32(qp->rss_ctx->base_qpn_tbl_sz);
2096 rss_context->default_qpn =
2097 cpu_to_be32(qp->rss_ctx->base_qpn_tbl_sz & 0xffffff);
2098 if (qp->rss_ctx->flags & (MLX4_RSS_UDP_IPV4 | MLX4_RSS_UDP_IPV6))
2099 rss_context->base_qpn_udp = rss_context->default_qpn;
2100 rss_context->flags = qp->rss_ctx->flags;
2101 /* Currently support just toeplitz */
2102 rss_context->hash_fn = MLX4_RSS_HASH_TOP;
2103
2104 memcpy(rss_context->rss_key, qp->rss_ctx->rss_key,
2105 MLX4_EN_RSS_KEY_SIZE);
2106 }
2107
2108 static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type,
2109 const struct ib_qp_attr *attr, int attr_mask,
2110 enum ib_qp_state cur_state,
2111 enum ib_qp_state new_state,
2112 struct ib_udata *udata)
2113 {
2114 struct ib_srq *ibsrq;
2115 const struct ib_gid_attr *gid_attr = NULL;
2116 struct ib_rwq_ind_table *rwq_ind_tbl;
2117 enum ib_qp_type qp_type;
2118 struct mlx4_ib_dev *dev;
2119 struct mlx4_ib_qp *qp;
2120 struct mlx4_ib_pd *pd;
2121 struct mlx4_ib_cq *send_cq, *recv_cq;
2122 struct mlx4_ib_ucontext *ucontext = rdma_udata_to_drv_context(
2123 udata, struct mlx4_ib_ucontext, ibucontext);
2124 struct mlx4_qp_context *context;
2125 enum mlx4_qp_optpar optpar = 0;
2126 int sqd_event;
2127 int steer_qp = 0;
2128 int err = -EINVAL;
2129 int counter_index;
2130
2131 if (src_type == MLX4_IB_RWQ_SRC) {
2132 struct ib_wq *ibwq;
2133
2134 ibwq = (struct ib_wq *)src;
2135 ibsrq = NULL;
2136 rwq_ind_tbl = NULL;
2137 qp_type = IB_QPT_RAW_PACKET;
2138 qp = to_mqp((struct ib_qp *)ibwq);
2139 dev = to_mdev(ibwq->device);
2140 pd = to_mpd(ibwq->pd);
2141 } else {
2142 struct ib_qp *ibqp;
2143
2144 ibqp = (struct ib_qp *)src;
2145 ibsrq = ibqp->srq;
2146 rwq_ind_tbl = ibqp->rwq_ind_tbl;
2147 qp_type = ibqp->qp_type;
2148 qp = to_mqp(ibqp);
2149 dev = to_mdev(ibqp->device);
2150 pd = get_pd(qp);
2151 }
2152
2153 /* APM is not supported under RoCE */
2154 if (attr_mask & IB_QP_ALT_PATH &&
2155 rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
2156 IB_LINK_LAYER_ETHERNET)
2157 return -ENOTSUPP;
2158
2159 context = kzalloc(sizeof *context, GFP_KERNEL);
2160 if (!context)
2161 return -ENOMEM;
2162
2163 context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
2164 (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
2165
2166 if (!(attr_mask & IB_QP_PATH_MIG_STATE))
2167 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
2168 else {
2169 optpar |= MLX4_QP_OPTPAR_PM_STATE;
2170 switch (attr->path_mig_state) {
2171 case IB_MIG_MIGRATED:
2172 context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
2173 break;
2174 case IB_MIG_REARM:
2175 context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
2176 break;
2177 case IB_MIG_ARMED:
2178 context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
2179 break;
2180 }
2181 }
2182
2183 if (qp->inl_recv_sz)
2184 context->param3 |= cpu_to_be32(1 << 25);
2185
2186 if (qp->flags & MLX4_IB_QP_SCATTER_FCS)
2187 context->param3 |= cpu_to_be32(1 << 29);
2188
2189 if (qp_type == IB_QPT_GSI || qp_type == IB_QPT_SMI)
2190 context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
2191 else if (qp_type == IB_QPT_RAW_PACKET)
2192 context->mtu_msgmax = (MLX4_RAW_QP_MTU << 5) | MLX4_RAW_QP_MSGMAX;
2193 else if (qp_type == IB_QPT_UD) {
2194 if (qp->flags & MLX4_IB_QP_LSO)
2195 context->mtu_msgmax = (IB_MTU_4096 << 5) |
2196 ilog2(dev->dev->caps.max_gso_sz);
2197 else
2198 context->mtu_msgmax = (IB_MTU_4096 << 5) | 13;
2199 } else if (attr_mask & IB_QP_PATH_MTU) {
2200 if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
2201 pr_err("path MTU (%u) is invalid\n",
2202 attr->path_mtu);
2203 goto out;
2204 }
2205 context->mtu_msgmax = (attr->path_mtu << 5) |
2206 ilog2(dev->dev->caps.max_msg_sz);
2207 }
2208
2209 if (!rwq_ind_tbl) { /* PRM RSS receive side should be left zeros */
2210 if (qp->rq.wqe_cnt)
2211 context->rq_size_stride = ilog2(qp->rq.wqe_cnt) << 3;
2212 context->rq_size_stride |= qp->rq.wqe_shift - 4;
2213 }
2214
2215 if (qp->sq.wqe_cnt)
2216 context->sq_size_stride = ilog2(qp->sq.wqe_cnt) << 3;
2217 context->sq_size_stride |= qp->sq.wqe_shift - 4;
2218
2219 if (new_state == IB_QPS_RESET && qp->counter_index)
2220 mlx4_ib_free_qp_counter(dev, qp);
2221
2222 if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) {
2223 context->sq_size_stride |= !!qp->sq_no_prefetch << 7;
2224 context->xrcd = cpu_to_be32((u32) qp->xrcdn);
2225 if (qp_type == IB_QPT_RAW_PACKET)
2226 context->param3 |= cpu_to_be32(1 << 30);
2227 }
2228
2229 if (ucontext)
2230 context->usr_page = cpu_to_be32(
2231 mlx4_to_hw_uar_index(dev->dev, ucontext->uar.index));
2232 else
2233 context->usr_page = cpu_to_be32(
2234 mlx4_to_hw_uar_index(dev->dev, dev->priv_uar.index));
2235
2236 if (attr_mask & IB_QP_DEST_QPN)
2237 context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
2238
2239 if (attr_mask & IB_QP_PORT) {
2240 if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
2241 !(attr_mask & IB_QP_AV)) {
2242 mlx4_set_sched(&context->pri_path, attr->port_num);
2243 optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
2244 }
2245 }
2246
2247 if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
2248 err = create_qp_lb_counter(dev, qp);
2249 if (err)
2250 goto out;
2251
2252 counter_index =
2253 dev->counters_table[qp->port - 1].default_counter;
2254 if (qp->counter_index)
2255 counter_index = qp->counter_index->index;
2256
2257 if (counter_index != -1) {
2258 context->pri_path.counter_index = counter_index;
2259 optpar |= MLX4_QP_OPTPAR_COUNTER_INDEX;
2260 if (qp->counter_index) {
2261 context->pri_path.fl |=
2262 MLX4_FL_ETH_SRC_CHECK_MC_LB;
2263 context->pri_path.vlan_control |=
2264 MLX4_CTRL_ETH_SRC_CHECK_IF_COUNTER;
2265 }
2266 } else
2267 context->pri_path.counter_index =
2268 MLX4_SINK_COUNTER_INDEX(dev->dev);
2269
2270 if (qp->flags & MLX4_IB_QP_NETIF) {
2271 mlx4_ib_steer_qp_reg(dev, qp, 1);
2272 steer_qp = 1;
2273 }
2274
2275 if (qp_type == IB_QPT_GSI) {
2276 enum ib_gid_type gid_type = qp->flags & MLX4_IB_ROCE_V2_GSI_QP ?
2277 IB_GID_TYPE_ROCE_UDP_ENCAP : IB_GID_TYPE_ROCE;
2278 u8 qpc_roce_mode = gid_type_to_qpc(gid_type);
2279
2280 context->rlkey_roce_mode |= (qpc_roce_mode << 6);
2281 }
2282 }
2283
2284 if (attr_mask & IB_QP_PKEY_INDEX) {
2285 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
2286 context->pri_path.disable_pkey_check = 0x40;
2287 context->pri_path.pkey_index = attr->pkey_index;
2288 optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
2289 }
2290
2291 if (attr_mask & IB_QP_AV) {
2292 u8 port_num = mlx4_is_bonded(dev->dev) ? 1 :
2293 attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
2294 u16 vlan = 0xffff;
2295 u8 smac[ETH_ALEN];
2296 int is_eth =
2297 rdma_cap_eth_ah(&dev->ib_dev, port_num) &&
2298 rdma_ah_get_ah_flags(&attr->ah_attr) & IB_AH_GRH;
2299
2300 if (is_eth) {
2301 gid_attr = attr->ah_attr.grh.sgid_attr;
2302 err = rdma_read_gid_l2_fields(gid_attr, &vlan,
2303 &smac[0]);
2304 if (err)
2305 goto out;
2306 }
2307
2308 if (mlx4_set_path(dev, attr, attr_mask, qp, &context->pri_path,
2309 port_num, vlan, smac))
2310 goto out;
2311
2312 optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
2313 MLX4_QP_OPTPAR_SCHED_QUEUE);
2314
2315 if (is_eth &&
2316 (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR)) {
2317 u8 qpc_roce_mode = gid_type_to_qpc(gid_attr->gid_type);
2318
2319 if (qpc_roce_mode == MLX4_QPC_ROCE_MODE_UNDEFINED) {
2320 err = -EINVAL;
2321 goto out;
2322 }
2323 context->rlkey_roce_mode |= (qpc_roce_mode << 6);
2324 }
2325
2326 }
2327
2328 if (attr_mask & IB_QP_TIMEOUT) {
2329 context->pri_path.ackto |= attr->timeout << 3;
2330 optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
2331 }
2332
2333 if (attr_mask & IB_QP_ALT_PATH) {
2334 if (attr->alt_port_num == 0 ||
2335 attr->alt_port_num > dev->dev->caps.num_ports)
2336 goto out;
2337
2338 if (attr->alt_pkey_index >=
2339 dev->dev->caps.pkey_table_len[attr->alt_port_num])
2340 goto out;
2341
2342 if (mlx4_set_alt_path(dev, attr, attr_mask, qp,
2343 &context->alt_path,
2344 attr->alt_port_num))
2345 goto out;
2346
2347 context->alt_path.pkey_index = attr->alt_pkey_index;
2348 context->alt_path.ackto = attr->alt_timeout << 3;
2349 optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
2350 }
2351
2352 context->pd = cpu_to_be32(pd->pdn);
2353
2354 if (!rwq_ind_tbl) {
2355 context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
2356 get_cqs(qp, src_type, &send_cq, &recv_cq);
2357 } else { /* Set dummy CQs to be compatible with HV and PRM */
2358 send_cq = to_mcq(rwq_ind_tbl->ind_tbl[0]->cq);
2359 recv_cq = send_cq;
2360 }
2361 context->cqn_send = cpu_to_be32(send_cq->mcq.cqn);
2362 context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn);
2363
2364 /* Set "fast registration enabled" for all kernel QPs */
2365 if (!ucontext)
2366 context->params1 |= cpu_to_be32(1 << 11);
2367
2368 if (attr_mask & IB_QP_RNR_RETRY) {
2369 context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
2370 optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
2371 }
2372
2373 if (attr_mask & IB_QP_RETRY_CNT) {
2374 context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
2375 optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
2376 }
2377
2378 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
2379 if (attr->max_rd_atomic)
2380 context->params1 |=
2381 cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
2382 optpar |= MLX4_QP_OPTPAR_SRA_MAX;
2383 }
2384
2385 if (attr_mask & IB_QP_SQ_PSN)
2386 context->next_send_psn = cpu_to_be32(attr->sq_psn);
2387
2388 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
2389 if (attr->max_dest_rd_atomic)
2390 context->params2 |=
2391 cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
2392 optpar |= MLX4_QP_OPTPAR_RRA_MAX;
2393 }
2394
2395 if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
2396 context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
2397 optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
2398 }
2399
2400 if (ibsrq)
2401 context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
2402
2403 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
2404 context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
2405 optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
2406 }
2407 if (attr_mask & IB_QP_RQ_PSN)
2408 context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
2409
2410 /* proxy and tunnel qp qkeys will be changed in modify-qp wrappers */
2411 if (attr_mask & IB_QP_QKEY) {
2412 if (qp->mlx4_ib_qp_type &
2413 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))
2414 context->qkey = cpu_to_be32(IB_QP_SET_QKEY);
2415 else {
2416 if (mlx4_is_mfunc(dev->dev) &&
2417 !(qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV) &&
2418 (attr->qkey & MLX4_RESERVED_QKEY_MASK) ==
2419 MLX4_RESERVED_QKEY_BASE) {
2420 pr_err("Cannot use reserved QKEY"
2421 " 0x%x (range 0xffff0000..0xffffffff"
2422 " is reserved)\n", attr->qkey);
2423 err = -EINVAL;
2424 goto out;
2425 }
2426 context->qkey = cpu_to_be32(attr->qkey);
2427 }
2428 optpar |= MLX4_QP_OPTPAR_Q_KEY;
2429 }
2430
2431 if (ibsrq)
2432 context->srqn = cpu_to_be32(1 << 24 |
2433 to_msrq(ibsrq)->msrq.srqn);
2434
2435 if (qp->rq.wqe_cnt &&
2436 cur_state == IB_QPS_RESET &&
2437 new_state == IB_QPS_INIT)
2438 context->db_rec_addr = cpu_to_be64(qp->db.dma);
2439
2440 if (cur_state == IB_QPS_INIT &&
2441 new_state == IB_QPS_RTR &&
2442 (qp_type == IB_QPT_GSI || qp_type == IB_QPT_SMI ||
2443 qp_type == IB_QPT_UD || qp_type == IB_QPT_RAW_PACKET)) {
2444 context->pri_path.sched_queue = (qp->port - 1) << 6;
2445 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
2446 qp->mlx4_ib_qp_type &
2447 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER)) {
2448 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
2449 if (qp->mlx4_ib_qp_type != MLX4_IB_QPT_SMI)
2450 context->pri_path.fl = 0x80;
2451 } else {
2452 if (qp->mlx4_ib_qp_type & MLX4_IB_QPT_ANY_SRIOV)
2453 context->pri_path.fl = 0x80;
2454 context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
2455 }
2456 if (rdma_port_get_link_layer(&dev->ib_dev, qp->port) ==
2457 IB_LINK_LAYER_ETHERNET) {
2458 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI ||
2459 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI)
2460 context->pri_path.feup = 1 << 7; /* don't fsm */
2461 /* handle smac_index */
2462 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_UD ||
2463 qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI ||
2464 qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_GSI) {
2465 err = handle_eth_ud_smac_index(dev, qp, context);
2466 if (err) {
2467 err = -EINVAL;
2468 goto out;
2469 }
2470 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_GSI)
2471 dev->qp1_proxy[qp->port - 1] = qp;
2472 }
2473 }
2474 }
2475
2476 if (qp_type == IB_QPT_RAW_PACKET) {
2477 context->pri_path.ackto = (context->pri_path.ackto & 0xf8) |
2478 MLX4_IB_LINK_TYPE_ETH;
2479 if (dev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
2480 /* set QP to receive both tunneled & non-tunneled packets */
2481 if (!rwq_ind_tbl)
2482 context->srqn = cpu_to_be32(7 << 28);
2483 }
2484 }
2485
2486 if (qp_type == IB_QPT_UD && (new_state == IB_QPS_RTR)) {
2487 int is_eth = rdma_port_get_link_layer(
2488 &dev->ib_dev, qp->port) ==
2489 IB_LINK_LAYER_ETHERNET;
2490 if (is_eth) {
2491 context->pri_path.ackto = MLX4_IB_LINK_TYPE_ETH;
2492 optpar |= MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH;
2493 }
2494 }
2495
2496 if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
2497 attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
2498 sqd_event = 1;
2499 else
2500 sqd_event = 0;
2501
2502 if (!ucontext &&
2503 cur_state == IB_QPS_RESET &&
2504 new_state == IB_QPS_INIT)
2505 context->rlkey_roce_mode |= (1 << 4);
2506
2507 /*
2508 * Before passing a kernel QP to the HW, make sure that the
2509 * ownership bits of the send queue are set and the SQ
2510 * headroom is stamped so that the hardware doesn't start
2511 * processing stale work requests.
2512 */
2513 if (!ucontext &&
2514 cur_state == IB_QPS_RESET &&
2515 new_state == IB_QPS_INIT) {
2516 struct mlx4_wqe_ctrl_seg *ctrl;
2517 int i;
2518
2519 for (i = 0; i < qp->sq.wqe_cnt; ++i) {
2520 ctrl = get_send_wqe(qp, i);
2521 ctrl->owner_opcode = cpu_to_be32(1 << 31);
2522 ctrl->qpn_vlan.fence_size =
2523 1 << (qp->sq.wqe_shift - 4);
2524 stamp_send_wqe(qp, i);
2525 }
2526 }
2527
2528 if (rwq_ind_tbl &&
2529 cur_state == IB_QPS_RESET &&
2530 new_state == IB_QPS_INIT) {
2531 fill_qp_rss_context(context, qp);
2532 context->flags |= cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET);
2533 }
2534
2535 err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
2536 to_mlx4_state(new_state), context, optpar,
2537 sqd_event, &qp->mqp);
2538 if (err)
2539 goto out;
2540
2541 qp->state = new_state;
2542
2543 if (attr_mask & IB_QP_ACCESS_FLAGS)
2544 qp->atomic_rd_en = attr->qp_access_flags;
2545 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
2546 qp->resp_depth = attr->max_dest_rd_atomic;
2547 if (attr_mask & IB_QP_PORT) {
2548 qp->port = attr->port_num;
2549 update_mcg_macs(dev, qp);
2550 }
2551 if (attr_mask & IB_QP_ALT_PATH)
2552 qp->alt_port = attr->alt_port_num;
2553
2554 if (is_sqp(dev, qp))
2555 store_sqp_attrs(qp->sqp, attr, attr_mask);
2556
2557 /*
2558 * If we moved QP0 to RTR, bring the IB link up; if we moved
2559 * QP0 to RESET or ERROR, bring the link back down.
2560 */
2561 if (is_qp0(dev, qp)) {
2562 if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
2563 if (mlx4_INIT_PORT(dev->dev, qp->port))
2564 pr_warn("INIT_PORT failed for port %d\n",
2565 qp->port);
2566
2567 if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
2568 (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
2569 mlx4_CLOSE_PORT(dev->dev, qp->port);
2570 }
2571
2572 /*
2573 * If we moved a kernel QP to RESET, clean up all old CQ
2574 * entries and reinitialize the QP.
2575 */
2576 if (new_state == IB_QPS_RESET) {
2577 if (!ucontext) {
2578 mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
2579 ibsrq ? to_msrq(ibsrq) : NULL);
2580 if (send_cq != recv_cq)
2581 mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
2582
2583 qp->rq.head = 0;
2584 qp->rq.tail = 0;
2585 qp->sq.head = 0;
2586 qp->sq.tail = 0;
2587 qp->sq_next_wqe = 0;
2588 if (qp->rq.wqe_cnt)
2589 *qp->db.db = 0;
2590
2591 if (qp->flags & MLX4_IB_QP_NETIF)
2592 mlx4_ib_steer_qp_reg(dev, qp, 0);
2593 }
2594 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port)) {
2595 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
2596 qp->pri.smac = 0;
2597 qp->pri.smac_port = 0;
2598 }
2599 if (qp->alt.smac) {
2600 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
2601 qp->alt.smac = 0;
2602 }
2603 if (qp->pri.vid < 0x1000) {
2604 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port, qp->pri.vid);
2605 qp->pri.vid = 0xFFFF;
2606 qp->pri.candidate_vid = 0xFFFF;
2607 qp->pri.update_vid = 0;
2608 }
2609
2610 if (qp->alt.vid < 0x1000) {
2611 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port, qp->alt.vid);
2612 qp->alt.vid = 0xFFFF;
2613 qp->alt.candidate_vid = 0xFFFF;
2614 qp->alt.update_vid = 0;
2615 }
2616 }
2617 out:
2618 if (err && qp->counter_index)
2619 mlx4_ib_free_qp_counter(dev, qp);
2620 if (err && steer_qp)
2621 mlx4_ib_steer_qp_reg(dev, qp, 0);
2622 kfree(context);
2623 if (qp->pri.candidate_smac ||
2624 (!qp->pri.candidate_smac && qp->pri.candidate_smac_port)) {
2625 if (err) {
2626 mlx4_unregister_mac(dev->dev, qp->pri.candidate_smac_port, qp->pri.candidate_smac);
2627 } else {
2628 if (qp->pri.smac || (!qp->pri.smac && qp->pri.smac_port))
2629 mlx4_unregister_mac(dev->dev, qp->pri.smac_port, qp->pri.smac);
2630 qp->pri.smac = qp->pri.candidate_smac;
2631 qp->pri.smac_index = qp->pri.candidate_smac_index;
2632 qp->pri.smac_port = qp->pri.candidate_smac_port;
2633 }
2634 qp->pri.candidate_smac = 0;
2635 qp->pri.candidate_smac_index = 0;
2636 qp->pri.candidate_smac_port = 0;
2637 }
2638 if (qp->alt.candidate_smac) {
2639 if (err) {
2640 mlx4_unregister_mac(dev->dev, qp->alt.candidate_smac_port, qp->alt.candidate_smac);
2641 } else {
2642 if (qp->alt.smac)
2643 mlx4_unregister_mac(dev->dev, qp->alt.smac_port, qp->alt.smac);
2644 qp->alt.smac = qp->alt.candidate_smac;
2645 qp->alt.smac_index = qp->alt.candidate_smac_index;
2646 qp->alt.smac_port = qp->alt.candidate_smac_port;
2647 }
2648 qp->alt.candidate_smac = 0;
2649 qp->alt.candidate_smac_index = 0;
2650 qp->alt.candidate_smac_port = 0;
2651 }
2652
2653 if (qp->pri.update_vid) {
2654 if (err) {
2655 if (qp->pri.candidate_vid < 0x1000)
2656 mlx4_unregister_vlan(dev->dev, qp->pri.candidate_vlan_port,
2657 qp->pri.candidate_vid);
2658 } else {
2659 if (qp->pri.vid < 0x1000)
2660 mlx4_unregister_vlan(dev->dev, qp->pri.vlan_port,
2661 qp->pri.vid);
2662 qp->pri.vid = qp->pri.candidate_vid;
2663 qp->pri.vlan_port = qp->pri.candidate_vlan_port;
2664 qp->pri.vlan_index = qp->pri.candidate_vlan_index;
2665 }
2666 qp->pri.candidate_vid = 0xFFFF;
2667 qp->pri.update_vid = 0;
2668 }
2669
2670 if (qp->alt.update_vid) {
2671 if (err) {
2672 if (qp->alt.candidate_vid < 0x1000)
2673 mlx4_unregister_vlan(dev->dev, qp->alt.candidate_vlan_port,
2674 qp->alt.candidate_vid);
2675 } else {
2676 if (qp->alt.vid < 0x1000)
2677 mlx4_unregister_vlan(dev->dev, qp->alt.vlan_port,
2678 qp->alt.vid);
2679 qp->alt.vid = qp->alt.candidate_vid;
2680 qp->alt.vlan_port = qp->alt.candidate_vlan_port;
2681 qp->alt.vlan_index = qp->alt.candidate_vlan_index;
2682 }
2683 qp->alt.candidate_vid = 0xFFFF;
2684 qp->alt.update_vid = 0;
2685 }
2686
2687 return err;
2688 }
2689
2690 enum {
2691 MLX4_IB_MODIFY_QP_RSS_SUP_ATTR_MSK = (IB_QP_STATE |
2692 IB_QP_PORT),
2693 };
2694
2695 static int _mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2696 int attr_mask, struct ib_udata *udata)
2697 {
2698 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
2699 struct mlx4_ib_qp *qp = to_mqp(ibqp);
2700 enum ib_qp_state cur_state, new_state;
2701 int err = -EINVAL;
2702 mutex_lock(&qp->mutex);
2703
2704 cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
2705 new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
2706
2707 if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
2708 attr_mask)) {
2709 pr_debug("qpn 0x%x: invalid attribute mask specified "
2710 "for transition %d to %d. qp_type %d,"
2711 " attr_mask 0x%x\n",
2712 ibqp->qp_num, cur_state, new_state,
2713 ibqp->qp_type, attr_mask);
2714 goto out;
2715 }
2716
2717 if (ibqp->rwq_ind_tbl) {
2718 if (!(((cur_state == IB_QPS_RESET) &&
2719 (new_state == IB_QPS_INIT)) ||
2720 ((cur_state == IB_QPS_INIT) &&
2721 (new_state == IB_QPS_RTR)))) {
2722 pr_debug("qpn 0x%x: RSS QP unsupported transition %d to %d\n",
2723 ibqp->qp_num, cur_state, new_state);
2724
2725 err = -EOPNOTSUPP;
2726 goto out;
2727 }
2728
2729 if (attr_mask & ~MLX4_IB_MODIFY_QP_RSS_SUP_ATTR_MSK) {
2730 pr_debug("qpn 0x%x: RSS QP unsupported attribute mask 0x%x for transition %d to %d\n",
2731 ibqp->qp_num, attr_mask, cur_state, new_state);
2732
2733 err = -EOPNOTSUPP;
2734 goto out;
2735 }
2736 }
2737
2738 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT)) {
2739 if ((cur_state == IB_QPS_RESET) && (new_state == IB_QPS_INIT)) {
2740 if ((ibqp->qp_type == IB_QPT_RC) ||
2741 (ibqp->qp_type == IB_QPT_UD) ||
2742 (ibqp->qp_type == IB_QPT_UC) ||
2743 (ibqp->qp_type == IB_QPT_RAW_PACKET) ||
2744 (ibqp->qp_type == IB_QPT_XRC_INI)) {
2745 attr->port_num = mlx4_ib_bond_next_port(dev);
2746 }
2747 } else {
2748 /* no sense in changing port_num
2749 * when ports are bonded */
2750 attr_mask &= ~IB_QP_PORT;
2751 }
2752 }
2753
2754 if ((attr_mask & IB_QP_PORT) &&
2755 (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
2756 pr_debug("qpn 0x%x: invalid port number (%d) specified "
2757 "for transition %d to %d. qp_type %d\n",
2758 ibqp->qp_num, attr->port_num, cur_state,
2759 new_state, ibqp->qp_type);
2760 goto out;
2761 }
2762
2763 if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_PACKET) &&
2764 (rdma_port_get_link_layer(&dev->ib_dev, attr->port_num) !=
2765 IB_LINK_LAYER_ETHERNET))
2766 goto out;
2767
2768 if (attr_mask & IB_QP_PKEY_INDEX) {
2769 int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
2770 if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
2771 pr_debug("qpn 0x%x: invalid pkey index (%d) specified "
2772 "for transition %d to %d. qp_type %d\n",
2773 ibqp->qp_num, attr->pkey_index, cur_state,
2774 new_state, ibqp->qp_type);
2775 goto out;
2776 }
2777 }
2778
2779 if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
2780 attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
2781 pr_debug("qpn 0x%x: max_rd_atomic (%d) too large. "
2782 "Transition %d to %d. qp_type %d\n",
2783 ibqp->qp_num, attr->max_rd_atomic, cur_state,
2784 new_state, ibqp->qp_type);
2785 goto out;
2786 }
2787
2788 if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
2789 attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
2790 pr_debug("qpn 0x%x: max_dest_rd_atomic (%d) too large. "
2791 "Transition %d to %d. qp_type %d\n",
2792 ibqp->qp_num, attr->max_dest_rd_atomic, cur_state,
2793 new_state, ibqp->qp_type);
2794 goto out;
2795 }
2796
2797 if (cur_state == new_state && cur_state == IB_QPS_RESET) {
2798 err = 0;
2799 goto out;
2800 }
2801
2802 if (ibqp->rwq_ind_tbl && (new_state == IB_QPS_INIT)) {
2803 err = bringup_rss_rwqs(ibqp->rwq_ind_tbl, attr->port_num,
2804 udata);
2805 if (err)
2806 goto out;
2807 }
2808
2809 err = __mlx4_ib_modify_qp(ibqp, MLX4_IB_QP_SRC, attr, attr_mask,
2810 cur_state, new_state, udata);
2811
2812 if (ibqp->rwq_ind_tbl && err)
2813 bring_down_rss_rwqs(ibqp->rwq_ind_tbl, udata);
2814
2815 if (mlx4_is_bonded(dev->dev) && (attr_mask & IB_QP_PORT))
2816 attr->port_num = 1;
2817
2818 out:
2819 mutex_unlock(&qp->mutex);
2820 return err;
2821 }
2822
2823 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
2824 int attr_mask, struct ib_udata *udata)
2825 {
2826 struct mlx4_ib_qp *mqp = to_mqp(ibqp);
2827 int ret;
2828
2829 if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
2830 return -EOPNOTSUPP;
2831
2832 ret = _mlx4_ib_modify_qp(ibqp, attr, attr_mask, udata);
2833
2834 if (mqp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) {
2835 struct mlx4_ib_sqp *sqp = mqp->sqp;
2836 int err = 0;
2837
2838 if (sqp->roce_v2_gsi)
2839 err = ib_modify_qp(sqp->roce_v2_gsi, attr, attr_mask);
2840 if (err)
2841 pr_err("Failed to modify GSI QP for RoCEv2 (%d)\n",
2842 err);
2843 }
2844 return ret;
2845 }
2846
2847 static int vf_get_qp0_qkey(struct mlx4_dev *dev, int qpn, u32 *qkey)
2848 {
2849 int i;
2850 for (i = 0; i < dev->caps.num_ports; i++) {
2851 if (qpn == dev->caps.spec_qps[i].qp0_proxy ||
2852 qpn == dev->caps.spec_qps[i].qp0_tunnel) {
2853 *qkey = dev->caps.spec_qps[i].qp0_qkey;
2854 return 0;
2855 }
2856 }
2857 return -EINVAL;
2858 }
2859
2860 static int build_sriov_qp0_header(struct mlx4_ib_qp *qp,
2861 const struct ib_ud_wr *wr,
2862 void *wqe, unsigned *mlx_seg_len)
2863 {
2864 struct mlx4_ib_dev *mdev = to_mdev(qp->ibqp.device);
2865 struct mlx4_ib_sqp *sqp = qp->sqp;
2866 struct ib_device *ib_dev = qp->ibqp.device;
2867 struct mlx4_wqe_mlx_seg *mlx = wqe;
2868 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
2869 struct mlx4_ib_ah *ah = to_mah(wr->ah);
2870 u16 pkey;
2871 u32 qkey;
2872 int send_size;
2873 int header_size;
2874 int spc;
2875 int err;
2876 int i;
2877
2878 if (wr->wr.opcode != IB_WR_SEND)
2879 return -EINVAL;
2880
2881 send_size = 0;
2882
2883 for (i = 0; i < wr->wr.num_sge; ++i)
2884 send_size += wr->wr.sg_list[i].length;
2885
2886 /* for proxy-qp0 sends, need to add in size of tunnel header */
2887 /* for tunnel-qp0 sends, tunnel header is already in s/g list */
2888 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER)
2889 send_size += sizeof (struct mlx4_ib_tunnel_header);
2890
2891 ib_ud_header_init(send_size, 1, 0, 0, 0, 0, 0, 0, &sqp->ud_header);
2892
2893 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_PROXY_SMI_OWNER) {
2894 sqp->ud_header.lrh.service_level =
2895 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
2896 sqp->ud_header.lrh.destination_lid =
2897 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2898 sqp->ud_header.lrh.source_lid =
2899 cpu_to_be16(ah->av.ib.g_slid & 0x7f);
2900 }
2901
2902 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
2903
2904 /* force loopback */
2905 mlx->flags |= cpu_to_be32(MLX4_WQE_MLX_VL15 | 0x1 | MLX4_WQE_MLX_SLR);
2906 mlx->rlid = sqp->ud_header.lrh.destination_lid;
2907
2908 sqp->ud_header.lrh.virtual_lane = 0;
2909 sqp->ud_header.bth.solicited_event = !!(wr->wr.send_flags & IB_SEND_SOLICITED);
2910 err = ib_get_cached_pkey(ib_dev, qp->port, 0, &pkey);
2911 if (err)
2912 return err;
2913 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
2914 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_TUN_SMI_OWNER)
2915 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->remote_qpn);
2916 else
2917 sqp->ud_header.bth.destination_qpn =
2918 cpu_to_be32(mdev->dev->caps.spec_qps[qp->port - 1].qp0_tunnel);
2919
2920 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
2921 if (mlx4_is_master(mdev->dev)) {
2922 if (mlx4_get_parav_qkey(mdev->dev, qp->mqp.qpn, &qkey))
2923 return -EINVAL;
2924 } else {
2925 if (vf_get_qp0_qkey(mdev->dev, qp->mqp.qpn, &qkey))
2926 return -EINVAL;
2927 }
2928 sqp->ud_header.deth.qkey = cpu_to_be32(qkey);
2929 sqp->ud_header.deth.source_qpn = cpu_to_be32(qp->mqp.qpn);
2930
2931 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
2932 sqp->ud_header.immediate_present = 0;
2933
2934 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
2935
2936 /*
2937 * Inline data segments may not cross a 64 byte boundary. If
2938 * our UD header is bigger than the space available up to the
2939 * next 64 byte boundary in the WQE, use two inline data
2940 * segments to hold the UD header.
2941 */
2942 spc = MLX4_INLINE_ALIGN -
2943 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
2944 if (header_size <= spc) {
2945 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
2946 memcpy(inl + 1, sqp->header_buf, header_size);
2947 i = 1;
2948 } else {
2949 inl->byte_count = cpu_to_be32(1 << 31 | spc);
2950 memcpy(inl + 1, sqp->header_buf, spc);
2951
2952 inl = (void *) (inl + 1) + spc;
2953 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
2954 /*
2955 * Need a barrier here to make sure all the data is
2956 * visible before the byte_count field is set.
2957 * Otherwise the HCA prefetcher could grab the 64-byte
2958 * chunk with this inline segment and get a valid (!=
2959 * 0xffffffff) byte count but stale data, and end up
2960 * generating a packet with bad headers.
2961 *
2962 * The first inline segment's byte_count field doesn't
2963 * need a barrier, because it comes after a
2964 * control/MLX segment and therefore is at an offset
2965 * of 16 mod 64.
2966 */
2967 wmb();
2968 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
2969 i = 2;
2970 }
2971
2972 *mlx_seg_len =
2973 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
2974 return 0;
2975 }
2976
2977 static u8 sl_to_vl(struct mlx4_ib_dev *dev, u8 sl, int port_num)
2978 {
2979 union sl2vl_tbl_to_u64 tmp_vltab;
2980 u8 vl;
2981
2982 if (sl > 15)
2983 return 0xf;
2984 tmp_vltab.sl64 = atomic64_read(&dev->sl2vl[port_num - 1]);
2985 vl = tmp_vltab.sl8[sl >> 1];
2986 if (sl & 1)
2987 vl &= 0x0f;
2988 else
2989 vl >>= 4;
2990 return vl;
2991 }
2992
2993 static int fill_gid_by_hw_index(struct mlx4_ib_dev *ibdev, u8 port_num,
2994 int index, union ib_gid *gid,
2995 enum ib_gid_type *gid_type)
2996 {
2997 struct mlx4_ib_iboe *iboe = &ibdev->iboe;
2998 struct mlx4_port_gid_table *port_gid_table;
2999 unsigned long flags;
3000
3001 port_gid_table = &iboe->gids[port_num - 1];
3002 spin_lock_irqsave(&iboe->lock, flags);
3003 memcpy(gid, &port_gid_table->gids[index].gid, sizeof(*gid));
3004 *gid_type = port_gid_table->gids[index].gid_type;
3005 spin_unlock_irqrestore(&iboe->lock, flags);
3006 if (rdma_is_zero_gid(gid))
3007 return -ENOENT;
3008
3009 return 0;
3010 }
3011
3012 #define MLX4_ROCEV2_QP1_SPORT 0xC000
3013 static int build_mlx_header(struct mlx4_ib_qp *qp, const struct ib_ud_wr *wr,
3014 void *wqe, unsigned *mlx_seg_len)
3015 {
3016 struct mlx4_ib_sqp *sqp = qp->sqp;
3017 struct ib_device *ib_dev = qp->ibqp.device;
3018 struct mlx4_ib_dev *ibdev = to_mdev(ib_dev);
3019 struct mlx4_wqe_mlx_seg *mlx = wqe;
3020 struct mlx4_wqe_ctrl_seg *ctrl = wqe;
3021 struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
3022 struct mlx4_ib_ah *ah = to_mah(wr->ah);
3023 union ib_gid sgid;
3024 u16 pkey;
3025 int send_size;
3026 int header_size;
3027 int spc;
3028 int i;
3029 int err = 0;
3030 u16 vlan = 0xffff;
3031 bool is_eth;
3032 bool is_vlan = false;
3033 bool is_grh;
3034 bool is_udp = false;
3035 int ip_version = 0;
3036
3037 send_size = 0;
3038 for (i = 0; i < wr->wr.num_sge; ++i)
3039 send_size += wr->wr.sg_list[i].length;
3040
3041 is_eth = rdma_port_get_link_layer(qp->ibqp.device, qp->port) == IB_LINK_LAYER_ETHERNET;
3042 is_grh = mlx4_ib_ah_grh_present(ah);
3043 if (is_eth) {
3044 enum ib_gid_type gid_type;
3045 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
3046 /* When multi-function is enabled, the ib_core gid
3047 * indexes don't necessarily match the hw ones, so
3048 * we must use our own cache */
3049 err = mlx4_get_roce_gid_from_slave(to_mdev(ib_dev)->dev,
3050 be32_to_cpu(ah->av.ib.port_pd) >> 24,
3051 ah->av.ib.gid_index, &sgid.raw[0]);
3052 if (err)
3053 return err;
3054 } else {
3055 err = fill_gid_by_hw_index(ibdev, qp->port,
3056 ah->av.ib.gid_index, &sgid,
3057 &gid_type);
3058 if (!err) {
3059 is_udp = gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP;
3060 if (is_udp) {
3061 if (ipv6_addr_v4mapped((struct in6_addr *)&sgid))
3062 ip_version = 4;
3063 else
3064 ip_version = 6;
3065 is_grh = false;
3066 }
3067 } else {
3068 return err;
3069 }
3070 }
3071 if (ah->av.eth.vlan != cpu_to_be16(0xffff)) {
3072 vlan = be16_to_cpu(ah->av.eth.vlan) & 0x0fff;
3073 is_vlan = true;
3074 }
3075 }
3076 err = ib_ud_header_init(send_size, !is_eth, is_eth, is_vlan, is_grh,
3077 ip_version, is_udp, 0, &sqp->ud_header);
3078 if (err)
3079 return err;
3080
3081 if (!is_eth) {
3082 sqp->ud_header.lrh.service_level =
3083 be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
3084 sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
3085 sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
3086 }
3087
3088 if (is_grh || (ip_version == 6)) {
3089 sqp->ud_header.grh.traffic_class =
3090 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
3091 sqp->ud_header.grh.flow_label =
3092 ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
3093 sqp->ud_header.grh.hop_limit = ah->av.ib.hop_limit;
3094 if (is_eth) {
3095 memcpy(sqp->ud_header.grh.source_gid.raw, sgid.raw, 16);
3096 } else {
3097 if (mlx4_is_mfunc(to_mdev(ib_dev)->dev)) {
3098 /* When multi-function is enabled, the ib_core gid
3099 * indexes don't necessarily match the hw ones, so
3100 * we must use our own cache
3101 */
3102 sqp->ud_header.grh.source_gid.global
3103 .subnet_prefix =
3104 cpu_to_be64(atomic64_read(
3105 &(to_mdev(ib_dev)
3106 ->sriov
3107 .demux[qp->port - 1]
3108 .subnet_prefix)));
3109 sqp->ud_header.grh.source_gid.global
3110 .interface_id =
3111 to_mdev(ib_dev)
3112 ->sriov.demux[qp->port - 1]
3113 .guid_cache[ah->av.ib.gid_index];
3114 } else {
3115 sqp->ud_header.grh.source_gid =
3116 ah->ibah.sgid_attr->gid;
3117 }
3118 }
3119 memcpy(sqp->ud_header.grh.destination_gid.raw,
3120 ah->av.ib.dgid, 16);
3121 }
3122
3123 if (ip_version == 4) {
3124 sqp->ud_header.ip4.tos =
3125 (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
3126 sqp->ud_header.ip4.id = 0;
3127 sqp->ud_header.ip4.frag_off = htons(IP_DF);
3128 sqp->ud_header.ip4.ttl = ah->av.eth.hop_limit;
3129
3130 memcpy(&sqp->ud_header.ip4.saddr,
3131 sgid.raw + 12, 4);
3132 memcpy(&sqp->ud_header.ip4.daddr, ah->av.ib.dgid + 12, 4);
3133 sqp->ud_header.ip4.check = ib_ud_ip4_csum(&sqp->ud_header);
3134 }
3135
3136 if (is_udp) {
3137 sqp->ud_header.udp.dport = htons(ROCE_V2_UDP_DPORT);
3138 sqp->ud_header.udp.sport = htons(MLX4_ROCEV2_QP1_SPORT);
3139 sqp->ud_header.udp.csum = 0;
3140 }
3141
3142 mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
3143
3144 if (!is_eth) {
3145 mlx->flags |=
3146 cpu_to_be32((!qp->ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
3147 (sqp->ud_header.lrh.destination_lid ==
3148 IB_LID_PERMISSIVE ?
3149 MLX4_WQE_MLX_SLR :
3150 0) |
3151 (sqp->ud_header.lrh.service_level << 8));
3152 if (ah->av.ib.port_pd & cpu_to_be32(0x80000000))
3153 mlx->flags |= cpu_to_be32(0x1); /* force loopback */
3154 mlx->rlid = sqp->ud_header.lrh.destination_lid;
3155 }
3156
3157 switch (wr->wr.opcode) {
3158 case IB_WR_SEND:
3159 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
3160 sqp->ud_header.immediate_present = 0;
3161 break;
3162 case IB_WR_SEND_WITH_IMM:
3163 sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
3164 sqp->ud_header.immediate_present = 1;
3165 sqp->ud_header.immediate_data = wr->wr.ex.imm_data;
3166 break;
3167 default:
3168 return -EINVAL;
3169 }
3170
3171 if (is_eth) {
3172 u16 ether_type;
3173 u16 pcp = (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 29) << 13;
3174
3175 ether_type = (!is_udp) ? ETH_P_IBOE:
3176 (ip_version == 4 ? ETH_P_IP : ETH_P_IPV6);
3177
3178 mlx->sched_prio = cpu_to_be16(pcp);
3179
3180 ether_addr_copy(sqp->ud_header.eth.smac_h, ah->av.eth.s_mac);
3181 ether_addr_copy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac);
3182 memcpy(&ctrl->srcrb_flags16[0], ah->av.eth.mac, 2);
3183 memcpy(&ctrl->imm, ah->av.eth.mac + 2, 4);
3184
3185 if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
3186 mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
3187 if (!is_vlan) {
3188 sqp->ud_header.eth.type = cpu_to_be16(ether_type);
3189 } else {
3190 sqp->ud_header.vlan.type = cpu_to_be16(ether_type);
3191 sqp->ud_header.vlan.tag = cpu_to_be16(vlan | pcp);
3192 }
3193 } else {
3194 sqp->ud_header.lrh.virtual_lane =
3195 !qp->ibqp.qp_num ?
3196 15 :
3197 sl_to_vl(to_mdev(ib_dev),
3198 sqp->ud_header.lrh.service_level,
3199 qp->port);
3200 if (qp->ibqp.qp_num && sqp->ud_header.lrh.virtual_lane == 15)
3201 return -EINVAL;
3202 if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
3203 sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
3204 }
3205 sqp->ud_header.bth.solicited_event = !!(wr->wr.send_flags & IB_SEND_SOLICITED);
3206 if (!qp->ibqp.qp_num)
3207 err = ib_get_cached_pkey(ib_dev, qp->port, sqp->pkey_index,
3208 &pkey);
3209 else
3210 err = ib_get_cached_pkey(ib_dev, qp->port, wr->pkey_index,
3211 &pkey);
3212 if (err)
3213 return err;
3214
3215 sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
3216 sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->remote_qpn);
3217 sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
3218 sqp->ud_header.deth.qkey = cpu_to_be32(wr->remote_qkey & 0x80000000 ?
3219 sqp->qkey : wr->remote_qkey);
3220 sqp->ud_header.deth.source_qpn = cpu_to_be32(qp->ibqp.qp_num);
3221
3222 header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
3223
3224 if (0) {
3225 pr_err("built UD header of size %d:\n", header_size);
3226 for (i = 0; i < header_size / 4; ++i) {
3227 if (i % 8 == 0)
3228 pr_err(" [%02x] ", i * 4);
3229 pr_cont(" %08x",
3230 be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
3231 if ((i + 1) % 8 == 0)
3232 pr_cont("\n");
3233 }
3234 pr_err("\n");
3235 }
3236
3237 /*
3238 * Inline data segments may not cross a 64 byte boundary. If
3239 * our UD header is bigger than the space available up to the
3240 * next 64 byte boundary in the WQE, use two inline data
3241 * segments to hold the UD header.
3242 */
3243 spc = MLX4_INLINE_ALIGN -
3244 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
3245 if (header_size <= spc) {
3246 inl->byte_count = cpu_to_be32(1 << 31 | header_size);
3247 memcpy(inl + 1, sqp->header_buf, header_size);
3248 i = 1;
3249 } else {
3250 inl->byte_count = cpu_to_be32(1 << 31 | spc);
3251 memcpy(inl + 1, sqp->header_buf, spc);
3252
3253 inl = (void *) (inl + 1) + spc;
3254 memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
3255 /*
3256 * Need a barrier here to make sure all the data is
3257 * visible before the byte_count field is set.
3258 * Otherwise the HCA prefetcher could grab the 64-byte
3259 * chunk with this inline segment and get a valid (!=
3260 * 0xffffffff) byte count but stale data, and end up
3261 * generating a packet with bad headers.
3262 *
3263 * The first inline segment's byte_count field doesn't
3264 * need a barrier, because it comes after a
3265 * control/MLX segment and therefore is at an offset
3266 * of 16 mod 64.
3267 */
3268 wmb();
3269 inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
3270 i = 2;
3271 }
3272
3273 *mlx_seg_len =
3274 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
3275 return 0;
3276 }
3277
3278 static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
3279 {
3280 unsigned cur;
3281 struct mlx4_ib_cq *cq;
3282
3283 cur = wq->head - wq->tail;
3284 if (likely(cur + nreq < wq->max_post))
3285 return 0;
3286
3287 cq = to_mcq(ib_cq);
3288 spin_lock(&cq->lock);
3289 cur = wq->head - wq->tail;
3290 spin_unlock(&cq->lock);
3291
3292 return cur + nreq >= wq->max_post;
3293 }
3294
3295 static __be32 convert_access(int acc)
3296 {
3297 return (acc & IB_ACCESS_REMOTE_ATOMIC ?
3298 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_ATOMIC) : 0) |
3299 (acc & IB_ACCESS_REMOTE_WRITE ?
3300 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_WRITE) : 0) |
3301 (acc & IB_ACCESS_REMOTE_READ ?
3302 cpu_to_be32(MLX4_WQE_FMR_AND_BIND_PERM_REMOTE_READ) : 0) |
3303 (acc & IB_ACCESS_LOCAL_WRITE ? cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_WRITE) : 0) |
3304 cpu_to_be32(MLX4_WQE_FMR_PERM_LOCAL_READ);
3305 }
3306
3307 static void set_reg_seg(struct mlx4_wqe_fmr_seg *fseg,
3308 const struct ib_reg_wr *wr)
3309 {
3310 struct mlx4_ib_mr *mr = to_mmr(wr->mr);
3311
3312 fseg->flags = convert_access(wr->access);
3313 fseg->mem_key = cpu_to_be32(wr->key);
3314 fseg->buf_list = cpu_to_be64(mr->page_map);
3315 fseg->start_addr = cpu_to_be64(mr->ibmr.iova);
3316 fseg->reg_len = cpu_to_be64(mr->ibmr.length);
3317 fseg->offset = 0; /* XXX -- is this just for ZBVA? */
3318 fseg->page_size = cpu_to_be32(ilog2(mr->ibmr.page_size));
3319 fseg->reserved[0] = 0;
3320 fseg->reserved[1] = 0;
3321 }
3322
3323 static void set_local_inv_seg(struct mlx4_wqe_local_inval_seg *iseg, u32 rkey)
3324 {
3325 memset(iseg, 0, sizeof(*iseg));
3326 iseg->mem_key = cpu_to_be32(rkey);
3327 }
3328
3329 static __always_inline void set_raddr_seg(struct mlx4_wqe_raddr_seg *rseg,
3330 u64 remote_addr, u32 rkey)
3331 {
3332 rseg->raddr = cpu_to_be64(remote_addr);
3333 rseg->rkey = cpu_to_be32(rkey);
3334 rseg->reserved = 0;
3335 }
3336
3337 static void set_atomic_seg(struct mlx4_wqe_atomic_seg *aseg,
3338 const struct ib_atomic_wr *wr)
3339 {
3340 if (wr->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
3341 aseg->swap_add = cpu_to_be64(wr->swap);
3342 aseg->compare = cpu_to_be64(wr->compare_add);
3343 } else if (wr->wr.opcode == IB_WR_MASKED_ATOMIC_FETCH_AND_ADD) {
3344 aseg->swap_add = cpu_to_be64(wr->compare_add);
3345 aseg->compare = cpu_to_be64(wr->compare_add_mask);
3346 } else {
3347 aseg->swap_add = cpu_to_be64(wr->compare_add);
3348 aseg->compare = 0;
3349 }
3350
3351 }
3352
3353 static void set_masked_atomic_seg(struct mlx4_wqe_masked_atomic_seg *aseg,
3354 const struct ib_atomic_wr *wr)
3355 {
3356 aseg->swap_add = cpu_to_be64(wr->swap);
3357 aseg->swap_add_mask = cpu_to_be64(wr->swap_mask);
3358 aseg->compare = cpu_to_be64(wr->compare_add);
3359 aseg->compare_mask = cpu_to_be64(wr->compare_add_mask);
3360 }
3361
3362 static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
3363 const struct ib_ud_wr *wr)
3364 {
3365 memcpy(dseg->av, &to_mah(wr->ah)->av, sizeof (struct mlx4_av));
3366 dseg->dqpn = cpu_to_be32(wr->remote_qpn);
3367 dseg->qkey = cpu_to_be32(wr->remote_qkey);
3368 dseg->vlan = to_mah(wr->ah)->av.eth.vlan;
3369 memcpy(dseg->mac, to_mah(wr->ah)->av.eth.mac, 6);
3370 }
3371
3372 static void set_tunnel_datagram_seg(struct mlx4_ib_dev *dev,
3373 struct mlx4_wqe_datagram_seg *dseg,
3374 const struct ib_ud_wr *wr,
3375 enum mlx4_ib_qp_type qpt)
3376 {
3377 union mlx4_ext_av *av = &to_mah(wr->ah)->av;
3378 struct mlx4_av sqp_av = {0};
3379 int port = *((u8 *) &av->ib.port_pd) & 0x3;
3380
3381 /* force loopback */
3382 sqp_av.port_pd = av->ib.port_pd | cpu_to_be32(0x80000000);
3383 sqp_av.g_slid = av->ib.g_slid & 0x7f; /* no GRH */
3384 sqp_av.sl_tclass_flowlabel = av->ib.sl_tclass_flowlabel &
3385 cpu_to_be32(0xf0000000);
3386
3387 memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
3388 if (qpt == MLX4_IB_QPT_PROXY_GSI)
3389 dseg->dqpn = cpu_to_be32(dev->dev->caps.spec_qps[port - 1].qp1_tunnel);
3390 else
3391 dseg->dqpn = cpu_to_be32(dev->dev->caps.spec_qps[port - 1].qp0_tunnel);
3392 /* Use QKEY from the QP context, which is set by master */
3393 dseg->qkey = cpu_to_be32(IB_QP_SET_QKEY);
3394 }
3395
3396 static void build_tunnel_header(const struct ib_ud_wr *wr, void *wqe,
3397 unsigned *mlx_seg_len)
3398 {
3399 struct mlx4_wqe_inline_seg *inl = wqe;
3400 struct mlx4_ib_tunnel_header hdr;
3401 struct mlx4_ib_ah *ah = to_mah(wr->ah);
3402 int spc;
3403 int i;
3404
3405 memcpy(&hdr.av, &ah->av, sizeof hdr.av);
3406 hdr.remote_qpn = cpu_to_be32(wr->remote_qpn);
3407 hdr.pkey_index = cpu_to_be16(wr->pkey_index);
3408 hdr.qkey = cpu_to_be32(wr->remote_qkey);
3409 memcpy(hdr.mac, ah->av.eth.mac, 6);
3410 hdr.vlan = ah->av.eth.vlan;
3411
3412 spc = MLX4_INLINE_ALIGN -
3413 ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
3414 if (sizeof (hdr) <= spc) {
3415 memcpy(inl + 1, &hdr, sizeof (hdr));
3416 wmb();
3417 inl->byte_count = cpu_to_be32(1 << 31 | sizeof (hdr));
3418 i = 1;
3419 } else {
3420 memcpy(inl + 1, &hdr, spc);
3421 wmb();
3422 inl->byte_count = cpu_to_be32(1 << 31 | spc);
3423
3424 inl = (void *) (inl + 1) + spc;
3425 memcpy(inl + 1, (void *) &hdr + spc, sizeof (hdr) - spc);
3426 wmb();
3427 inl->byte_count = cpu_to_be32(1 << 31 | (sizeof (hdr) - spc));
3428 i = 2;
3429 }
3430
3431 *mlx_seg_len =
3432 ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + sizeof (hdr), 16);
3433 }
3434
3435 static void set_mlx_icrc_seg(void *dseg)
3436 {
3437 u32 *t = dseg;
3438 struct mlx4_wqe_inline_seg *iseg = dseg;
3439
3440 t[1] = 0;
3441
3442 /*
3443 * Need a barrier here before writing the byte_count field to
3444 * make sure that all the data is visible before the
3445 * byte_count field is set. Otherwise, if the segment begins
3446 * a new cacheline, the HCA prefetcher could grab the 64-byte
3447 * chunk and get a valid (!= * 0xffffffff) byte count but
3448 * stale data, and end up sending the wrong data.
3449 */
3450 wmb();
3451
3452 iseg->byte_count = cpu_to_be32((1 << 31) | 4);
3453 }
3454
3455 static void set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
3456 {
3457 dseg->lkey = cpu_to_be32(sg->lkey);
3458 dseg->addr = cpu_to_be64(sg->addr);
3459
3460 /*
3461 * Need a barrier here before writing the byte_count field to
3462 * make sure that all the data is visible before the
3463 * byte_count field is set. Otherwise, if the segment begins
3464 * a new cacheline, the HCA prefetcher could grab the 64-byte
3465 * chunk and get a valid (!= * 0xffffffff) byte count but
3466 * stale data, and end up sending the wrong data.
3467 */
3468 wmb();
3469
3470 dseg->byte_count = cpu_to_be32(sg->length);
3471 }
3472
3473 static void __set_data_seg(struct mlx4_wqe_data_seg *dseg, struct ib_sge *sg)
3474 {
3475 dseg->byte_count = cpu_to_be32(sg->length);
3476 dseg->lkey = cpu_to_be32(sg->lkey);
3477 dseg->addr = cpu_to_be64(sg->addr);
3478 }
3479
3480 static int build_lso_seg(struct mlx4_wqe_lso_seg *wqe,
3481 const struct ib_ud_wr *wr, struct mlx4_ib_qp *qp,
3482 unsigned *lso_seg_len, __be32 *lso_hdr_sz, __be32 *blh)
3483 {
3484 unsigned halign = ALIGN(sizeof *wqe + wr->hlen, 16);
3485
3486 if (unlikely(halign > MLX4_IB_CACHE_LINE_SIZE))
3487 *blh = cpu_to_be32(1 << 6);
3488
3489 if (unlikely(!(qp->flags & MLX4_IB_QP_LSO) &&
3490 wr->wr.num_sge > qp->sq.max_gs - (halign >> 4)))
3491 return -EINVAL;
3492
3493 memcpy(wqe->header, wr->header, wr->hlen);
3494
3495 *lso_hdr_sz = cpu_to_be32(wr->mss << 16 | wr->hlen);
3496 *lso_seg_len = halign;
3497 return 0;
3498 }
3499
3500 static __be32 send_ieth(const struct ib_send_wr *wr)
3501 {
3502 switch (wr->opcode) {
3503 case IB_WR_SEND_WITH_IMM:
3504 case IB_WR_RDMA_WRITE_WITH_IMM:
3505 return wr->ex.imm_data;
3506
3507 case IB_WR_SEND_WITH_INV:
3508 return cpu_to_be32(wr->ex.invalidate_rkey);
3509
3510 default:
3511 return 0;
3512 }
3513 }
3514
3515 static void add_zero_len_inline(void *wqe)
3516 {
3517 struct mlx4_wqe_inline_seg *inl = wqe;
3518 memset(wqe, 0, 16);
3519 inl->byte_count = cpu_to_be32(1 << 31);
3520 }
3521
3522 static int _mlx4_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
3523 const struct ib_send_wr **bad_wr, bool drain)
3524 {
3525 struct mlx4_ib_qp *qp = to_mqp(ibqp);
3526 void *wqe;
3527 struct mlx4_wqe_ctrl_seg *ctrl;
3528 struct mlx4_wqe_data_seg *dseg;
3529 unsigned long flags;
3530 int nreq;
3531 int err = 0;
3532 unsigned ind;
3533 int size;
3534 unsigned seglen;
3535 __be32 dummy;
3536 __be32 *lso_wqe;
3537 __be32 lso_hdr_sz;
3538 __be32 blh;
3539 int i;
3540 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
3541
3542 if (qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI) {
3543 struct mlx4_ib_sqp *sqp = qp->sqp;
3544
3545 if (sqp->roce_v2_gsi) {
3546 struct mlx4_ib_ah *ah = to_mah(ud_wr(wr)->ah);
3547 enum ib_gid_type gid_type;
3548 union ib_gid gid;
3549
3550 if (!fill_gid_by_hw_index(mdev, qp->port,
3551 ah->av.ib.gid_index,
3552 &gid, &gid_type))
3553 qp = (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ?
3554 to_mqp(sqp->roce_v2_gsi) : qp;
3555 else
3556 pr_err("Failed to get gid at index %d. RoCEv2 will not work properly\n",
3557 ah->av.ib.gid_index);
3558 }
3559 }
3560
3561 spin_lock_irqsave(&qp->sq.lock, flags);
3562 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR &&
3563 !drain) {
3564 err = -EIO;
3565 *bad_wr = wr;
3566 nreq = 0;
3567 goto out;
3568 }
3569
3570 ind = qp->sq_next_wqe;
3571
3572 for (nreq = 0; wr; ++nreq, wr = wr->next) {
3573 lso_wqe = &dummy;
3574 blh = 0;
3575
3576 if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
3577 err = -ENOMEM;
3578 *bad_wr = wr;
3579 goto out;
3580 }
3581
3582 if (unlikely(wr->num_sge > qp->sq.max_gs)) {
3583 err = -EINVAL;
3584 *bad_wr = wr;
3585 goto out;
3586 }
3587
3588 ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.wqe_cnt - 1));
3589 qp->sq.wrid[(qp->sq.head + nreq) & (qp->sq.wqe_cnt - 1)] = wr->wr_id;
3590
3591 ctrl->srcrb_flags =
3592 (wr->send_flags & IB_SEND_SIGNALED ?
3593 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
3594 (wr->send_flags & IB_SEND_SOLICITED ?
3595 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
3596 ((wr->send_flags & IB_SEND_IP_CSUM) ?
3597 cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
3598 MLX4_WQE_CTRL_TCP_UDP_CSUM) : 0) |
3599 qp->sq_signal_bits;
3600
3601 ctrl->imm = send_ieth(wr);
3602
3603 wqe += sizeof *ctrl;
3604 size = sizeof *ctrl / 16;
3605
3606 switch (qp->mlx4_ib_qp_type) {
3607 case MLX4_IB_QPT_RC:
3608 case MLX4_IB_QPT_UC:
3609 switch (wr->opcode) {
3610 case IB_WR_ATOMIC_CMP_AND_SWP:
3611 case IB_WR_ATOMIC_FETCH_AND_ADD:
3612 case IB_WR_MASKED_ATOMIC_FETCH_AND_ADD:
3613 set_raddr_seg(wqe, atomic_wr(wr)->remote_addr,
3614 atomic_wr(wr)->rkey);
3615 wqe += sizeof (struct mlx4_wqe_raddr_seg);
3616
3617 set_atomic_seg(wqe, atomic_wr(wr));
3618 wqe += sizeof (struct mlx4_wqe_atomic_seg);
3619
3620 size += (sizeof (struct mlx4_wqe_raddr_seg) +
3621 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
3622
3623 break;
3624
3625 case IB_WR_MASKED_ATOMIC_CMP_AND_SWP:
3626 set_raddr_seg(wqe, atomic_wr(wr)->remote_addr,
3627 atomic_wr(wr)->rkey);
3628 wqe += sizeof (struct mlx4_wqe_raddr_seg);
3629
3630 set_masked_atomic_seg(wqe, atomic_wr(wr));
3631 wqe += sizeof (struct mlx4_wqe_masked_atomic_seg);
3632
3633 size += (sizeof (struct mlx4_wqe_raddr_seg) +
3634 sizeof (struct mlx4_wqe_masked_atomic_seg)) / 16;
3635
3636 break;
3637
3638 case IB_WR_RDMA_READ:
3639 case IB_WR_RDMA_WRITE:
3640 case IB_WR_RDMA_WRITE_WITH_IMM:
3641 set_raddr_seg(wqe, rdma_wr(wr)->remote_addr,
3642 rdma_wr(wr)->rkey);
3643 wqe += sizeof (struct mlx4_wqe_raddr_seg);
3644 size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
3645 break;
3646
3647 case IB_WR_LOCAL_INV:
3648 ctrl->srcrb_flags |=
3649 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
3650 set_local_inv_seg(wqe, wr->ex.invalidate_rkey);
3651 wqe += sizeof (struct mlx4_wqe_local_inval_seg);
3652 size += sizeof (struct mlx4_wqe_local_inval_seg) / 16;
3653 break;
3654
3655 case IB_WR_REG_MR:
3656 ctrl->srcrb_flags |=
3657 cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER);
3658 set_reg_seg(wqe, reg_wr(wr));
3659 wqe += sizeof(struct mlx4_wqe_fmr_seg);
3660 size += sizeof(struct mlx4_wqe_fmr_seg) / 16;
3661 break;
3662
3663 default:
3664 /* No extra segments required for sends */
3665 break;
3666 }
3667 break;
3668
3669 case MLX4_IB_QPT_TUN_SMI_OWNER:
3670 err = build_sriov_qp0_header(qp, ud_wr(wr), ctrl,
3671 &seglen);
3672 if (unlikely(err)) {
3673 *bad_wr = wr;
3674 goto out;
3675 }
3676 wqe += seglen;
3677 size += seglen / 16;
3678 break;
3679 case MLX4_IB_QPT_TUN_SMI:
3680 case MLX4_IB_QPT_TUN_GSI:
3681 /* this is a UD qp used in MAD responses to slaves. */
3682 set_datagram_seg(wqe, ud_wr(wr));
3683 /* set the forced-loopback bit in the data seg av */
3684 *(__be32 *) wqe |= cpu_to_be32(0x80000000);
3685 wqe += sizeof (struct mlx4_wqe_datagram_seg);
3686 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
3687 break;
3688 case MLX4_IB_QPT_UD:
3689 set_datagram_seg(wqe, ud_wr(wr));
3690 wqe += sizeof (struct mlx4_wqe_datagram_seg);
3691 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
3692
3693 if (wr->opcode == IB_WR_LSO) {
3694 err = build_lso_seg(wqe, ud_wr(wr), qp, &seglen,
3695 &lso_hdr_sz, &blh);
3696 if (unlikely(err)) {
3697 *bad_wr = wr;
3698 goto out;
3699 }
3700 lso_wqe = (__be32 *) wqe;
3701 wqe += seglen;
3702 size += seglen / 16;
3703 }
3704 break;
3705
3706 case MLX4_IB_QPT_PROXY_SMI_OWNER:
3707 err = build_sriov_qp0_header(qp, ud_wr(wr), ctrl,
3708 &seglen);
3709 if (unlikely(err)) {
3710 *bad_wr = wr;
3711 goto out;
3712 }
3713 wqe += seglen;
3714 size += seglen / 16;
3715 /* to start tunnel header on a cache-line boundary */
3716 add_zero_len_inline(wqe);
3717 wqe += 16;
3718 size++;
3719 build_tunnel_header(ud_wr(wr), wqe, &seglen);
3720 wqe += seglen;
3721 size += seglen / 16;
3722 break;
3723 case MLX4_IB_QPT_PROXY_SMI:
3724 case MLX4_IB_QPT_PROXY_GSI:
3725 /* If we are tunneling special qps, this is a UD qp.
3726 * In this case we first add a UD segment targeting
3727 * the tunnel qp, and then add a header with address
3728 * information */
3729 set_tunnel_datagram_seg(to_mdev(ibqp->device), wqe,
3730 ud_wr(wr),
3731 qp->mlx4_ib_qp_type);
3732 wqe += sizeof (struct mlx4_wqe_datagram_seg);
3733 size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
3734 build_tunnel_header(ud_wr(wr), wqe, &seglen);
3735 wqe += seglen;
3736 size += seglen / 16;
3737 break;
3738
3739 case MLX4_IB_QPT_SMI:
3740 case MLX4_IB_QPT_GSI:
3741 err = build_mlx_header(qp, ud_wr(wr), ctrl, &seglen);
3742 if (unlikely(err)) {
3743 *bad_wr = wr;
3744 goto out;
3745 }
3746 wqe += seglen;
3747 size += seglen / 16;
3748 break;
3749
3750 default:
3751 break;
3752 }
3753
3754 /*
3755 * Write data segments in reverse order, so as to
3756 * overwrite cacheline stamp last within each
3757 * cacheline. This avoids issues with WQE
3758 * prefetching.
3759 */
3760
3761 dseg = wqe;
3762 dseg += wr->num_sge - 1;
3763 size += wr->num_sge * (sizeof (struct mlx4_wqe_data_seg) / 16);
3764
3765 /* Add one more inline data segment for ICRC for MLX sends */
3766 if (unlikely(qp->mlx4_ib_qp_type == MLX4_IB_QPT_SMI ||
3767 qp->mlx4_ib_qp_type == MLX4_IB_QPT_GSI ||
3768 qp->mlx4_ib_qp_type &
3769 (MLX4_IB_QPT_PROXY_SMI_OWNER | MLX4_IB_QPT_TUN_SMI_OWNER))) {
3770 set_mlx_icrc_seg(dseg + 1);
3771 size += sizeof (struct mlx4_wqe_data_seg) / 16;
3772 }
3773
3774 for (i = wr->num_sge - 1; i >= 0; --i, --dseg)
3775 set_data_seg(dseg, wr->sg_list + i);
3776
3777 /*
3778 * Possibly overwrite stamping in cacheline with LSO
3779 * segment only after making sure all data segments
3780 * are written.
3781 */
3782 wmb();
3783 *lso_wqe = lso_hdr_sz;
3784
3785 ctrl->qpn_vlan.fence_size = (wr->send_flags & IB_SEND_FENCE ?
3786 MLX4_WQE_CTRL_FENCE : 0) | size;
3787
3788 /*
3789 * Make sure descriptor is fully written before
3790 * setting ownership bit (because HW can start
3791 * executing as soon as we do).
3792 */
3793 wmb();
3794
3795 if (wr->opcode < 0 || wr->opcode >= ARRAY_SIZE(mlx4_ib_opcode)) {
3796 *bad_wr = wr;
3797 err = -EINVAL;
3798 goto out;
3799 }
3800
3801 ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
3802 (ind & qp->sq.wqe_cnt ? cpu_to_be32(1 << 31) : 0) | blh;
3803
3804 /*
3805 * We can improve latency by not stamping the last
3806 * send queue WQE until after ringing the doorbell, so
3807 * only stamp here if there are still more WQEs to post.
3808 */
3809 if (wr->next)
3810 stamp_send_wqe(qp, ind + qp->sq_spare_wqes);
3811 ind++;
3812 }
3813
3814 out:
3815 if (likely(nreq)) {
3816 qp->sq.head += nreq;
3817
3818 /*
3819 * Make sure that descriptors are written before
3820 * doorbell record.
3821 */
3822 wmb();
3823
3824 writel_relaxed(qp->doorbell_qpn,
3825 to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
3826
3827 stamp_send_wqe(qp, ind + qp->sq_spare_wqes - 1);
3828
3829 qp->sq_next_wqe = ind;
3830 }
3831
3832 spin_unlock_irqrestore(&qp->sq.lock, flags);
3833
3834 return err;
3835 }
3836
3837 int mlx4_ib_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
3838 const struct ib_send_wr **bad_wr)
3839 {
3840 return _mlx4_ib_post_send(ibqp, wr, bad_wr, false);
3841 }
3842
3843 static int _mlx4_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
3844 const struct ib_recv_wr **bad_wr, bool drain)
3845 {
3846 struct mlx4_ib_qp *qp = to_mqp(ibqp);
3847 struct mlx4_wqe_data_seg *scat;
3848 unsigned long flags;
3849 int err = 0;
3850 int nreq;
3851 int ind;
3852 int max_gs;
3853 int i;
3854 struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
3855
3856 max_gs = qp->rq.max_gs;
3857 spin_lock_irqsave(&qp->rq.lock, flags);
3858
3859 if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR &&
3860 !drain) {
3861 err = -EIO;
3862 *bad_wr = wr;
3863 nreq = 0;
3864 goto out;
3865 }
3866
3867 ind = qp->rq.head & (qp->rq.wqe_cnt - 1);
3868
3869 for (nreq = 0; wr; ++nreq, wr = wr->next) {
3870 if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) {
3871 err = -ENOMEM;
3872 *bad_wr = wr;
3873 goto out;
3874 }
3875
3876 if (unlikely(wr->num_sge > qp->rq.max_gs)) {
3877 err = -EINVAL;
3878 *bad_wr = wr;
3879 goto out;
3880 }
3881
3882 scat = get_recv_wqe(qp, ind);
3883
3884 if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
3885 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI)) {
3886 ib_dma_sync_single_for_device(ibqp->device,
3887 qp->sqp_proxy_rcv[ind].map,
3888 sizeof (struct mlx4_ib_proxy_sqp_hdr),
3889 DMA_FROM_DEVICE);
3890 scat->byte_count =
3891 cpu_to_be32(sizeof (struct mlx4_ib_proxy_sqp_hdr));
3892 /* use dma lkey from upper layer entry */
3893 scat->lkey = cpu_to_be32(wr->sg_list->lkey);
3894 scat->addr = cpu_to_be64(qp->sqp_proxy_rcv[ind].map);
3895 scat++;
3896 max_gs--;
3897 }
3898
3899 for (i = 0; i < wr->num_sge; ++i)
3900 __set_data_seg(scat + i, wr->sg_list + i);
3901
3902 if (i < max_gs) {
3903 scat[i].byte_count = 0;
3904 scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
3905 scat[i].addr = 0;
3906 }
3907
3908 qp->rq.wrid[ind] = wr->wr_id;
3909
3910 ind = (ind + 1) & (qp->rq.wqe_cnt - 1);
3911 }
3912
3913 out:
3914 if (likely(nreq)) {
3915 qp->rq.head += nreq;
3916
3917 /*
3918 * Make sure that descriptors are written before
3919 * doorbell record.
3920 */
3921 wmb();
3922
3923 *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
3924 }
3925
3926 spin_unlock_irqrestore(&qp->rq.lock, flags);
3927
3928 return err;
3929 }
3930
3931 int mlx4_ib_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
3932 const struct ib_recv_wr **bad_wr)
3933 {
3934 return _mlx4_ib_post_recv(ibqp, wr, bad_wr, false);
3935 }
3936
3937 static inline enum ib_qp_state to_ib_qp_state(enum mlx4_qp_state mlx4_state)
3938 {
3939 switch (mlx4_state) {
3940 case MLX4_QP_STATE_RST: return IB_QPS_RESET;
3941 case MLX4_QP_STATE_INIT: return IB_QPS_INIT;
3942 case MLX4_QP_STATE_RTR: return IB_QPS_RTR;
3943 case MLX4_QP_STATE_RTS: return IB_QPS_RTS;
3944 case MLX4_QP_STATE_SQ_DRAINING:
3945 case MLX4_QP_STATE_SQD: return IB_QPS_SQD;
3946 case MLX4_QP_STATE_SQER: return IB_QPS_SQE;
3947 case MLX4_QP_STATE_ERR: return IB_QPS_ERR;
3948 default: return -1;
3949 }
3950 }
3951
3952 static inline enum ib_mig_state to_ib_mig_state(int mlx4_mig_state)
3953 {
3954 switch (mlx4_mig_state) {
3955 case MLX4_QP_PM_ARMED: return IB_MIG_ARMED;
3956 case MLX4_QP_PM_REARM: return IB_MIG_REARM;
3957 case MLX4_QP_PM_MIGRATED: return IB_MIG_MIGRATED;
3958 default: return -1;
3959 }
3960 }
3961
3962 static int to_ib_qp_access_flags(int mlx4_flags)
3963 {
3964 int ib_flags = 0;
3965
3966 if (mlx4_flags & MLX4_QP_BIT_RRE)
3967 ib_flags |= IB_ACCESS_REMOTE_READ;
3968 if (mlx4_flags & MLX4_QP_BIT_RWE)
3969 ib_flags |= IB_ACCESS_REMOTE_WRITE;
3970 if (mlx4_flags & MLX4_QP_BIT_RAE)
3971 ib_flags |= IB_ACCESS_REMOTE_ATOMIC;
3972
3973 return ib_flags;
3974 }
3975
3976 static void to_rdma_ah_attr(struct mlx4_ib_dev *ibdev,
3977 struct rdma_ah_attr *ah_attr,
3978 struct mlx4_qp_path *path)
3979 {
3980 struct mlx4_dev *dev = ibdev->dev;
3981 u8 port_num = path->sched_queue & 0x40 ? 2 : 1;
3982
3983 memset(ah_attr, 0, sizeof(*ah_attr));
3984 if (port_num == 0 || port_num > dev->caps.num_ports)
3985 return;
3986 ah_attr->type = rdma_ah_find_type(&ibdev->ib_dev, port_num);
3987
3988 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE)
3989 rdma_ah_set_sl(ah_attr, ((path->sched_queue >> 3) & 0x7) |
3990 ((path->sched_queue & 4) << 1));
3991 else
3992 rdma_ah_set_sl(ah_attr, (path->sched_queue >> 2) & 0xf);
3993 rdma_ah_set_port_num(ah_attr, port_num);
3994
3995 rdma_ah_set_dlid(ah_attr, be16_to_cpu(path->rlid));
3996 rdma_ah_set_path_bits(ah_attr, path->grh_mylmc & 0x7f);
3997 rdma_ah_set_static_rate(ah_attr,
3998 path->static_rate ? path->static_rate - 5 : 0);
3999 if (path->grh_mylmc & (1 << 7)) {
4000 rdma_ah_set_grh(ah_attr, NULL,
4001 be32_to_cpu(path->tclass_flowlabel) & 0xfffff,
4002 path->mgid_index,
4003 path->hop_limit,
4004 (be32_to_cpu(path->tclass_flowlabel)
4005 >> 20) & 0xff);
4006 rdma_ah_set_dgid_raw(ah_attr, path->rgid);
4007 }
4008 }
4009
4010 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
4011 struct ib_qp_init_attr *qp_init_attr)
4012 {
4013 struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
4014 struct mlx4_ib_qp *qp = to_mqp(ibqp);
4015 struct mlx4_qp_context context;
4016 int mlx4_state;
4017 int err = 0;
4018
4019 if (ibqp->rwq_ind_tbl)
4020 return -EOPNOTSUPP;
4021
4022 mutex_lock(&qp->mutex);
4023
4024 if (qp->state == IB_QPS_RESET) {
4025 qp_attr->qp_state = IB_QPS_RESET;
4026 goto done;
4027 }
4028
4029 err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
4030 if (err) {
4031 err = -EINVAL;
4032 goto out;
4033 }
4034
4035 mlx4_state = be32_to_cpu(context.flags) >> 28;
4036
4037 qp->state = to_ib_qp_state(mlx4_state);
4038 qp_attr->qp_state = qp->state;
4039 qp_attr->path_mtu = context.mtu_msgmax >> 5;
4040 qp_attr->path_mig_state =
4041 to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
4042 qp_attr->qkey = be32_to_cpu(context.qkey);
4043 qp_attr->rq_psn = be32_to_cpu(context.rnr_nextrecvpsn) & 0xffffff;
4044 qp_attr->sq_psn = be32_to_cpu(context.next_send_psn) & 0xffffff;
4045 qp_attr->dest_qp_num = be32_to_cpu(context.remote_qpn) & 0xffffff;
4046 qp_attr->qp_access_flags =
4047 to_ib_qp_access_flags(be32_to_cpu(context.params2));
4048
4049 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC ||
4050 qp->ibqp.qp_type == IB_QPT_XRC_INI ||
4051 qp->ibqp.qp_type == IB_QPT_XRC_TGT) {
4052 to_rdma_ah_attr(dev, &qp_attr->ah_attr, &context.pri_path);
4053 to_rdma_ah_attr(dev, &qp_attr->alt_ah_attr, &context.alt_path);
4054 qp_attr->alt_pkey_index = context.alt_path.pkey_index & 0x7f;
4055 qp_attr->alt_port_num =
4056 rdma_ah_get_port_num(&qp_attr->alt_ah_attr);
4057 }
4058
4059 qp_attr->pkey_index = context.pri_path.pkey_index & 0x7f;
4060 if (qp_attr->qp_state == IB_QPS_INIT)
4061 qp_attr->port_num = qp->port;
4062 else
4063 qp_attr->port_num = context.pri_path.sched_queue & 0x40 ? 2 : 1;
4064
4065 /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
4066 qp_attr->sq_draining = mlx4_state == MLX4_QP_STATE_SQ_DRAINING;
4067
4068 qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context.params1) >> 21) & 0x7);
4069
4070 qp_attr->max_dest_rd_atomic =
4071 1 << ((be32_to_cpu(context.params2) >> 21) & 0x7);
4072 qp_attr->min_rnr_timer =
4073 (be32_to_cpu(context.rnr_nextrecvpsn) >> 24) & 0x1f;
4074 qp_attr->timeout = context.pri_path.ackto >> 3;
4075 qp_attr->retry_cnt = (be32_to_cpu(context.params1) >> 16) & 0x7;
4076 qp_attr->rnr_retry = (be32_to_cpu(context.params1) >> 13) & 0x7;
4077 qp_attr->alt_timeout = context.alt_path.ackto >> 3;
4078
4079 done:
4080 qp_attr->cur_qp_state = qp_attr->qp_state;
4081 qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt;
4082 qp_attr->cap.max_recv_sge = qp->rq.max_gs;
4083
4084 if (!ibqp->uobject) {
4085 qp_attr->cap.max_send_wr = qp->sq.wqe_cnt;
4086 qp_attr->cap.max_send_sge = qp->sq.max_gs;
4087 } else {
4088 qp_attr->cap.max_send_wr = 0;
4089 qp_attr->cap.max_send_sge = 0;
4090 }
4091
4092 /*
4093 * We don't support inline sends for kernel QPs (yet), and we
4094 * don't know what userspace's value should be.
4095 */
4096 qp_attr->cap.max_inline_data = 0;
4097
4098 qp_init_attr->cap = qp_attr->cap;
4099
4100 qp_init_attr->create_flags = 0;
4101 if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)
4102 qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK;
4103
4104 if (qp->flags & MLX4_IB_QP_LSO)
4105 qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO;
4106
4107 if (qp->flags & MLX4_IB_QP_NETIF)
4108 qp_init_attr->create_flags |= IB_QP_CREATE_NETIF_QP;
4109
4110 qp_init_attr->sq_sig_type =
4111 qp->sq_signal_bits == cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) ?
4112 IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
4113
4114 out:
4115 mutex_unlock(&qp->mutex);
4116 return err;
4117 }
4118
4119 struct ib_wq *mlx4_ib_create_wq(struct ib_pd *pd,
4120 struct ib_wq_init_attr *init_attr,
4121 struct ib_udata *udata)
4122 {
4123 struct mlx4_dev *dev = to_mdev(pd->device)->dev;
4124 struct ib_qp_init_attr ib_qp_init_attr = {};
4125 struct mlx4_ib_qp *qp;
4126 struct mlx4_ib_create_wq ucmd;
4127 int err, required_cmd_sz;
4128
4129 if (!udata)
4130 return ERR_PTR(-EINVAL);
4131
4132 required_cmd_sz = offsetof(typeof(ucmd), comp_mask) +
4133 sizeof(ucmd.comp_mask);
4134 if (udata->inlen < required_cmd_sz) {
4135 pr_debug("invalid inlen\n");
4136 return ERR_PTR(-EINVAL);
4137 }
4138
4139 if (udata->inlen > sizeof(ucmd) &&
4140 !ib_is_udata_cleared(udata, sizeof(ucmd),
4141 udata->inlen - sizeof(ucmd))) {
4142 pr_debug("inlen is not supported\n");
4143 return ERR_PTR(-EOPNOTSUPP);
4144 }
4145
4146 if (udata->outlen)
4147 return ERR_PTR(-EOPNOTSUPP);
4148
4149 if (init_attr->wq_type != IB_WQT_RQ) {
4150 pr_debug("unsupported wq type %d\n", init_attr->wq_type);
4151 return ERR_PTR(-EOPNOTSUPP);
4152 }
4153
4154 if (init_attr->create_flags & ~IB_WQ_FLAGS_SCATTER_FCS ||
4155 !(dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)) {
4156 pr_debug("unsupported create_flags %u\n",
4157 init_attr->create_flags);
4158 return ERR_PTR(-EOPNOTSUPP);
4159 }
4160
4161 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
4162 if (!qp)
4163 return ERR_PTR(-ENOMEM);
4164
4165 mutex_init(&qp->mutex);
4166 qp->pri.vid = 0xFFFF;
4167 qp->alt.vid = 0xFFFF;
4168
4169 ib_qp_init_attr.qp_context = init_attr->wq_context;
4170 ib_qp_init_attr.qp_type = IB_QPT_RAW_PACKET;
4171 ib_qp_init_attr.cap.max_recv_wr = init_attr->max_wr;
4172 ib_qp_init_attr.cap.max_recv_sge = init_attr->max_sge;
4173 ib_qp_init_attr.recv_cq = init_attr->cq;
4174 ib_qp_init_attr.send_cq = ib_qp_init_attr.recv_cq; /* Dummy CQ */
4175
4176 if (init_attr->create_flags & IB_WQ_FLAGS_SCATTER_FCS)
4177 ib_qp_init_attr.create_flags |= IB_QP_CREATE_SCATTER_FCS;
4178
4179 err = create_rq(pd, &ib_qp_init_attr, udata, qp);
4180 if (err) {
4181 kfree(qp);
4182 return ERR_PTR(err);
4183 }
4184
4185 qp->ibwq.event_handler = init_attr->event_handler;
4186 qp->ibwq.wq_num = qp->mqp.qpn;
4187 qp->ibwq.state = IB_WQS_RESET;
4188
4189 return &qp->ibwq;
4190 }
4191
4192 static int ib_wq2qp_state(enum ib_wq_state state)
4193 {
4194 switch (state) {
4195 case IB_WQS_RESET:
4196 return IB_QPS_RESET;
4197 case IB_WQS_RDY:
4198 return IB_QPS_RTR;
4199 default:
4200 return IB_QPS_ERR;
4201 }
4202 }
4203
4204 static int _mlx4_ib_modify_wq(struct ib_wq *ibwq, enum ib_wq_state new_state,
4205 struct ib_udata *udata)
4206 {
4207 struct mlx4_ib_qp *qp = to_mqp((struct ib_qp *)ibwq);
4208 enum ib_qp_state qp_cur_state;
4209 enum ib_qp_state qp_new_state;
4210 int attr_mask;
4211 int err;
4212
4213 /* ib_qp.state represents the WQ HW state while ib_wq.state represents
4214 * the WQ logic state.
4215 */
4216 qp_cur_state = qp->state;
4217 qp_new_state = ib_wq2qp_state(new_state);
4218
4219 if (ib_wq2qp_state(new_state) == qp_cur_state)
4220 return 0;
4221
4222 if (new_state == IB_WQS_RDY) {
4223 struct ib_qp_attr attr = {};
4224
4225 attr.port_num = qp->port;
4226 attr_mask = IB_QP_PORT;
4227
4228 err = __mlx4_ib_modify_qp(ibwq, MLX4_IB_RWQ_SRC, &attr,
4229 attr_mask, IB_QPS_RESET, IB_QPS_INIT,
4230 udata);
4231 if (err) {
4232 pr_debug("WQN=0x%06x failed to apply RST->INIT on the HW QP\n",
4233 ibwq->wq_num);
4234 return err;
4235 }
4236
4237 qp_cur_state = IB_QPS_INIT;
4238 }
4239
4240 attr_mask = 0;
4241 err = __mlx4_ib_modify_qp(ibwq, MLX4_IB_RWQ_SRC, NULL, attr_mask,
4242 qp_cur_state, qp_new_state, udata);
4243
4244 if (err && (qp_cur_state == IB_QPS_INIT)) {
4245 qp_new_state = IB_QPS_RESET;
4246 if (__mlx4_ib_modify_qp(ibwq, MLX4_IB_RWQ_SRC, NULL,
4247 attr_mask, IB_QPS_INIT, IB_QPS_RESET,
4248 udata)) {
4249 pr_warn("WQN=0x%06x failed with reverting HW's resources failure\n",
4250 ibwq->wq_num);
4251 qp_new_state = IB_QPS_INIT;
4252 }
4253 }
4254
4255 qp->state = qp_new_state;
4256
4257 return err;
4258 }
4259
4260 int mlx4_ib_modify_wq(struct ib_wq *ibwq, struct ib_wq_attr *wq_attr,
4261 u32 wq_attr_mask, struct ib_udata *udata)
4262 {
4263 struct mlx4_ib_qp *qp = to_mqp((struct ib_qp *)ibwq);
4264 struct mlx4_ib_modify_wq ucmd = {};
4265 size_t required_cmd_sz;
4266 enum ib_wq_state cur_state, new_state;
4267 int err = 0;
4268
4269 required_cmd_sz = offsetof(typeof(ucmd), reserved) +
4270 sizeof(ucmd.reserved);
4271 if (udata->inlen < required_cmd_sz)
4272 return -EINVAL;
4273
4274 if (udata->inlen > sizeof(ucmd) &&
4275 !ib_is_udata_cleared(udata, sizeof(ucmd),
4276 udata->inlen - sizeof(ucmd)))
4277 return -EOPNOTSUPP;
4278
4279 if (ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen)))
4280 return -EFAULT;
4281
4282 if (ucmd.comp_mask || ucmd.reserved)
4283 return -EOPNOTSUPP;
4284
4285 if (wq_attr_mask & IB_WQ_FLAGS)
4286 return -EOPNOTSUPP;
4287
4288 cur_state = wq_attr->curr_wq_state;
4289 new_state = wq_attr->wq_state;
4290
4291 if ((new_state == IB_WQS_RDY) && (cur_state == IB_WQS_ERR))
4292 return -EINVAL;
4293
4294 if ((new_state == IB_WQS_ERR) && (cur_state == IB_WQS_RESET))
4295 return -EINVAL;
4296
4297 /* Need to protect against the parent RSS which also may modify WQ
4298 * state.
4299 */
4300 mutex_lock(&qp->mutex);
4301
4302 /* Can update HW state only if a RSS QP has already associated to this
4303 * WQ, so we can apply its port on the WQ.
4304 */
4305 if (qp->rss_usecnt)
4306 err = _mlx4_ib_modify_wq(ibwq, new_state, udata);
4307
4308 if (!err)
4309 ibwq->state = new_state;
4310
4311 mutex_unlock(&qp->mutex);
4312
4313 return err;
4314 }
4315
4316 int mlx4_ib_destroy_wq(struct ib_wq *ibwq, struct ib_udata *udata)
4317 {
4318 struct mlx4_ib_dev *dev = to_mdev(ibwq->device);
4319 struct mlx4_ib_qp *qp = to_mqp((struct ib_qp *)ibwq);
4320
4321 if (qp->counter_index)
4322 mlx4_ib_free_qp_counter(dev, qp);
4323
4324 destroy_qp_common(dev, qp, MLX4_IB_RWQ_SRC, udata);
4325
4326 kfree(qp);
4327 return 0;
4328 }
4329
4330 int mlx4_ib_create_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table,
4331 struct ib_rwq_ind_table_init_attr *init_attr,
4332 struct ib_udata *udata)
4333 {
4334 struct mlx4_ib_create_rwq_ind_tbl_resp resp = {};
4335 unsigned int ind_tbl_size = 1 << init_attr->log_ind_tbl_size;
4336 struct ib_device *device = rwq_ind_table->device;
4337 unsigned int base_wqn;
4338 size_t min_resp_len;
4339 int i, err = 0;
4340
4341 if (udata->inlen > 0 &&
4342 !ib_is_udata_cleared(udata, 0,
4343 udata->inlen))
4344 return -EOPNOTSUPP;
4345
4346 min_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
4347 if (udata->outlen && udata->outlen < min_resp_len)
4348 return -EINVAL;
4349
4350 if (ind_tbl_size >
4351 device->attrs.rss_caps.max_rwq_indirection_table_size) {
4352 pr_debug("log_ind_tbl_size = %d is bigger than supported = %d\n",
4353 ind_tbl_size,
4354 device->attrs.rss_caps.max_rwq_indirection_table_size);
4355 return -EINVAL;
4356 }
4357
4358 base_wqn = init_attr->ind_tbl[0]->wq_num;
4359
4360 if (base_wqn % ind_tbl_size) {
4361 pr_debug("WQN=0x%x isn't aligned with indirection table size\n",
4362 base_wqn);
4363 return -EINVAL;
4364 }
4365
4366 for (i = 1; i < ind_tbl_size; i++) {
4367 if (++base_wqn != init_attr->ind_tbl[i]->wq_num) {
4368 pr_debug("indirection table's WQNs aren't consecutive\n");
4369 return -EINVAL;
4370 }
4371 }
4372
4373 if (udata->outlen) {
4374 resp.response_length = offsetof(typeof(resp), response_length) +
4375 sizeof(resp.response_length);
4376 err = ib_copy_to_udata(udata, &resp, resp.response_length);
4377 }
4378
4379 return err;
4380 }
4381
4382 struct mlx4_ib_drain_cqe {
4383 struct ib_cqe cqe;
4384 struct completion done;
4385 };
4386
4387 static void mlx4_ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)
4388 {
4389 struct mlx4_ib_drain_cqe *cqe = container_of(wc->wr_cqe,
4390 struct mlx4_ib_drain_cqe,
4391 cqe);
4392
4393 complete(&cqe->done);
4394 }
4395
4396 /* This function returns only once the drained WR was completed */
4397 static void handle_drain_completion(struct ib_cq *cq,
4398 struct mlx4_ib_drain_cqe *sdrain,
4399 struct mlx4_ib_dev *dev)
4400 {
4401 struct mlx4_dev *mdev = dev->dev;
4402
4403 if (cq->poll_ctx == IB_POLL_DIRECT) {
4404 while (wait_for_completion_timeout(&sdrain->done, HZ / 10) <= 0)
4405 ib_process_cq_direct(cq, -1);
4406 return;
4407 }
4408
4409 if (mdev->persist->state == MLX4_DEVICE_STATE_INTERNAL_ERROR) {
4410 struct mlx4_ib_cq *mcq = to_mcq(cq);
4411 bool triggered = false;
4412 unsigned long flags;
4413
4414 spin_lock_irqsave(&dev->reset_flow_resource_lock, flags);
4415 /* Make sure that the CQ handler won't run if wasn't run yet */
4416 if (!mcq->mcq.reset_notify_added)
4417 mcq->mcq.reset_notify_added = 1;
4418 else
4419 triggered = true;
4420 spin_unlock_irqrestore(&dev->reset_flow_resource_lock, flags);
4421
4422 if (triggered) {
4423 /* Wait for any scheduled/running task to be ended */
4424 switch (cq->poll_ctx) {
4425 case IB_POLL_SOFTIRQ:
4426 irq_poll_disable(&cq->iop);
4427 irq_poll_enable(&cq->iop);
4428 break;
4429 case IB_POLL_WORKQUEUE:
4430 cancel_work_sync(&cq->work);
4431 break;
4432 default:
4433 WARN_ON_ONCE(1);
4434 }
4435 }
4436
4437 /* Run the CQ handler - this makes sure that the drain WR will
4438 * be processed if wasn't processed yet.
4439 */
4440 mcq->mcq.comp(&mcq->mcq);
4441 }
4442
4443 wait_for_completion(&sdrain->done);
4444 }
4445
4446 void mlx4_ib_drain_sq(struct ib_qp *qp)
4447 {
4448 struct ib_cq *cq = qp->send_cq;
4449 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
4450 struct mlx4_ib_drain_cqe sdrain;
4451 const struct ib_send_wr *bad_swr;
4452 struct ib_rdma_wr swr = {
4453 .wr = {
4454 .next = NULL,
4455 { .wr_cqe = &sdrain.cqe, },
4456 .opcode = IB_WR_RDMA_WRITE,
4457 },
4458 };
4459 int ret;
4460 struct mlx4_ib_dev *dev = to_mdev(qp->device);
4461 struct mlx4_dev *mdev = dev->dev;
4462
4463 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
4464 if (ret && mdev->persist->state != MLX4_DEVICE_STATE_INTERNAL_ERROR) {
4465 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
4466 return;
4467 }
4468
4469 sdrain.cqe.done = mlx4_ib_drain_qp_done;
4470 init_completion(&sdrain.done);
4471
4472 ret = _mlx4_ib_post_send(qp, &swr.wr, &bad_swr, true);
4473 if (ret) {
4474 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
4475 return;
4476 }
4477
4478 handle_drain_completion(cq, &sdrain, dev);
4479 }
4480
4481 void mlx4_ib_drain_rq(struct ib_qp *qp)
4482 {
4483 struct ib_cq *cq = qp->recv_cq;
4484 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
4485 struct mlx4_ib_drain_cqe rdrain;
4486 struct ib_recv_wr rwr = {};
4487 const struct ib_recv_wr *bad_rwr;
4488 int ret;
4489 struct mlx4_ib_dev *dev = to_mdev(qp->device);
4490 struct mlx4_dev *mdev = dev->dev;
4491
4492 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
4493 if (ret && mdev->persist->state != MLX4_DEVICE_STATE_INTERNAL_ERROR) {
4494 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
4495 return;
4496 }
4497
4498 rwr.wr_cqe = &rdrain.cqe;
4499 rdrain.cqe.done = mlx4_ib_drain_qp_done;
4500 init_completion(&rdrain.done);
4501
4502 ret = _mlx4_ib_post_recv(qp, &rwr, &bad_rwr, true);
4503 if (ret) {
4504 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
4505 return;
4506 }
4507
4508 handle_drain_completion(cq, &rdrain, dev);
4509 }
4510
4511 int mlx4_ib_qp_event_init(void)
4512 {
4513 mlx4_ib_qp_event_wq = alloc_ordered_workqueue("mlx4_ib_qp_event_wq", 0);
4514 if (!mlx4_ib_qp_event_wq)
4515 return -ENOMEM;
4516
4517 return 0;
4518 }
4519
4520 void mlx4_ib_qp_event_cleanup(void)
4521 {
4522 destroy_workqueue(mlx4_ib_qp_event_wq);
4523 }
Kernel DRM miscellaneous fixes and cross-tree changes