Commit | Line | Data |
---|---|---|
e126ba97 EC |
1 | /* |
2 | * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include <linux/module.h> | |
34 | #include <linux/mlx5/qp.h> | |
35 | #include <linux/mlx5/srq.h> | |
36 | #include <linux/slab.h> | |
37 | #include <rdma/ib_umem.h> | |
43bc8893 | 38 | #include <rdma/ib_user_verbs.h> |
e126ba97 EC |
39 | |
40 | #include "mlx5_ib.h" | |
41 | #include "user.h" | |
42 | ||
43 | /* not supported currently */ | |
44 | static int srq_signature; | |
45 | ||
46 | static void *get_wqe(struct mlx5_ib_srq *srq, int n) | |
47 | { | |
48 | return mlx5_buf_offset(&srq->buf, n << srq->msrq.wqe_shift); | |
49 | } | |
50 | ||
51 | static void mlx5_ib_srq_event(struct mlx5_core_srq *srq, enum mlx5_event type) | |
52 | { | |
53 | struct ib_event event; | |
54 | struct ib_srq *ibsrq = &to_mibsrq(srq)->ibsrq; | |
55 | ||
56 | if (ibsrq->event_handler) { | |
57 | event.device = ibsrq->device; | |
58 | event.element.srq = ibsrq; | |
59 | switch (type) { | |
60 | case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT: | |
61 | event.event = IB_EVENT_SRQ_LIMIT_REACHED; | |
62 | break; | |
63 | case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR: | |
64 | event.event = IB_EVENT_SRQ_ERR; | |
65 | break; | |
66 | default: | |
67 | pr_warn("mlx5_ib: Unexpected event type %d on SRQ %06x\n", | |
68 | type, srq->srqn); | |
69 | return; | |
70 | } | |
71 | ||
72 | ibsrq->event_handler(&event, ibsrq->srq_context); | |
73 | } | |
74 | } | |
75 | ||
76 | static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq, | |
77 | struct mlx5_create_srq_mbox_in **in, | |
78 | struct ib_udata *udata, int buf_size, int *inlen) | |
79 | { | |
80 | struct mlx5_ib_dev *dev = to_mdev(pd->device); | |
81 | struct mlx5_ib_create_srq ucmd; | |
43bc8893 | 82 | size_t ucmdlen; |
e126ba97 EC |
83 | int err; |
84 | int npages; | |
85 | int page_shift; | |
86 | int ncont; | |
87 | u32 offset; | |
88 | ||
43bc8893 YD |
89 | ucmdlen = |
90 | (udata->inlen - sizeof(struct ib_uverbs_cmd_hdr) < | |
91 | sizeof(ucmd)) ? (sizeof(ucmd) - | |
92 | sizeof(ucmd.reserved)) : sizeof(ucmd); | |
93 | ||
94 | if (ib_copy_from_udata(&ucmd, udata, ucmdlen)) { | |
e126ba97 EC |
95 | mlx5_ib_dbg(dev, "failed copy udata\n"); |
96 | return -EFAULT; | |
97 | } | |
43bc8893 YD |
98 | |
99 | if (ucmdlen == sizeof(ucmd) && | |
100 | ucmd.reserved != 0) | |
101 | return -EINVAL; | |
102 | ||
e126ba97 EC |
103 | srq->wq_sig = !!(ucmd.flags & MLX5_SRQ_FLAG_SIGNATURE); |
104 | ||
105 | srq->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, buf_size, | |
106 | 0, 0); | |
107 | if (IS_ERR(srq->umem)) { | |
108 | mlx5_ib_dbg(dev, "failed umem get, size %d\n", buf_size); | |
109 | err = PTR_ERR(srq->umem); | |
110 | return err; | |
111 | } | |
112 | ||
113 | mlx5_ib_cont_pages(srq->umem, ucmd.buf_addr, &npages, | |
114 | &page_shift, &ncont, NULL); | |
115 | err = mlx5_ib_get_buf_offset(ucmd.buf_addr, page_shift, | |
116 | &offset); | |
117 | if (err) { | |
118 | mlx5_ib_warn(dev, "bad offset\n"); | |
119 | goto err_umem; | |
120 | } | |
121 | ||
122 | *inlen = sizeof(**in) + sizeof(*(*in)->pas) * ncont; | |
123 | *in = mlx5_vzalloc(*inlen); | |
124 | if (!(*in)) { | |
125 | err = -ENOMEM; | |
126 | goto err_umem; | |
127 | } | |
128 | ||
129 | mlx5_ib_populate_pas(dev, srq->umem, page_shift, (*in)->pas, 0); | |
130 | ||
131 | err = mlx5_ib_db_map_user(to_mucontext(pd->uobject->context), | |
132 | ucmd.db_addr, &srq->db); | |
133 | if (err) { | |
134 | mlx5_ib_dbg(dev, "map doorbell failed\n"); | |
135 | goto err_in; | |
136 | } | |
137 | ||
1b77d2bd | 138 | (*in)->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT; |
e126ba97 EC |
139 | (*in)->ctx.pgoff_cqn = cpu_to_be32(offset << 26); |
140 | ||
141 | return 0; | |
142 | ||
143 | err_in: | |
144 | mlx5_vfree(*in); | |
145 | ||
146 | err_umem: | |
147 | ib_umem_release(srq->umem); | |
148 | ||
149 | return err; | |
150 | } | |
151 | ||
152 | static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq, | |
153 | struct mlx5_create_srq_mbox_in **in, int buf_size, | |
154 | int *inlen) | |
155 | { | |
156 | int err; | |
157 | int i; | |
158 | struct mlx5_wqe_srq_next_seg *next; | |
159 | int page_shift; | |
160 | int npages; | |
161 | ||
9603b61d | 162 | err = mlx5_db_alloc(dev->mdev, &srq->db); |
e126ba97 EC |
163 | if (err) { |
164 | mlx5_ib_warn(dev, "alloc dbell rec failed\n"); | |
165 | return err; | |
166 | } | |
167 | ||
168 | *srq->db.db = 0; | |
169 | ||
9603b61d | 170 | if (mlx5_buf_alloc(dev->mdev, buf_size, PAGE_SIZE * 2, &srq->buf)) { |
e126ba97 EC |
171 | mlx5_ib_dbg(dev, "buf alloc failed\n"); |
172 | err = -ENOMEM; | |
173 | goto err_db; | |
174 | } | |
175 | page_shift = srq->buf.page_shift; | |
176 | ||
177 | srq->head = 0; | |
178 | srq->tail = srq->msrq.max - 1; | |
179 | srq->wqe_ctr = 0; | |
180 | ||
181 | for (i = 0; i < srq->msrq.max; i++) { | |
182 | next = get_wqe(srq, i); | |
183 | next->next_wqe_index = | |
184 | cpu_to_be16((i + 1) & (srq->msrq.max - 1)); | |
185 | } | |
186 | ||
187 | npages = DIV_ROUND_UP(srq->buf.npages, 1 << (page_shift - PAGE_SHIFT)); | |
188 | mlx5_ib_dbg(dev, "buf_size %d, page_shift %d, npages %d, calc npages %d\n", | |
189 | buf_size, page_shift, srq->buf.npages, npages); | |
190 | *inlen = sizeof(**in) + sizeof(*(*in)->pas) * npages; | |
191 | *in = mlx5_vzalloc(*inlen); | |
192 | if (!*in) { | |
193 | err = -ENOMEM; | |
194 | goto err_buf; | |
195 | } | |
196 | mlx5_fill_page_array(&srq->buf, (*in)->pas); | |
197 | ||
198 | srq->wrid = kmalloc(srq->msrq.max * sizeof(u64), GFP_KERNEL); | |
199 | if (!srq->wrid) { | |
200 | mlx5_ib_dbg(dev, "kmalloc failed %lu\n", | |
201 | (unsigned long)(srq->msrq.max * sizeof(u64))); | |
202 | err = -ENOMEM; | |
203 | goto err_in; | |
204 | } | |
205 | srq->wq_sig = !!srq_signature; | |
206 | ||
1b77d2bd | 207 | (*in)->ctx.log_pg_sz = page_shift - MLX5_ADAPTER_PAGE_SHIFT; |
e126ba97 EC |
208 | |
209 | return 0; | |
210 | ||
211 | err_in: | |
212 | mlx5_vfree(*in); | |
213 | ||
214 | err_buf: | |
9603b61d | 215 | mlx5_buf_free(dev->mdev, &srq->buf); |
e126ba97 EC |
216 | |
217 | err_db: | |
9603b61d | 218 | mlx5_db_free(dev->mdev, &srq->db); |
e126ba97 EC |
219 | return err; |
220 | } | |
221 | ||
222 | static void destroy_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq) | |
223 | { | |
224 | mlx5_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db); | |
225 | ib_umem_release(srq->umem); | |
226 | } | |
227 | ||
228 | ||
229 | static void destroy_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq) | |
230 | { | |
231 | kfree(srq->wrid); | |
9603b61d JM |
232 | mlx5_buf_free(dev->mdev, &srq->buf); |
233 | mlx5_db_free(dev->mdev, &srq->db); | |
e126ba97 EC |
234 | } |
235 | ||
236 | struct ib_srq *mlx5_ib_create_srq(struct ib_pd *pd, | |
237 | struct ib_srq_init_attr *init_attr, | |
238 | struct ib_udata *udata) | |
239 | { | |
240 | struct mlx5_ib_dev *dev = to_mdev(pd->device); | |
241 | struct mlx5_ib_srq *srq; | |
242 | int desc_size; | |
243 | int buf_size; | |
244 | int err; | |
245 | struct mlx5_create_srq_mbox_in *uninitialized_var(in); | |
246 | int uninitialized_var(inlen); | |
247 | int is_xrc; | |
248 | u32 flgs, xrcdn; | |
249 | ||
250 | /* Sanity check SRQ size before proceeding */ | |
9603b61d | 251 | if (init_attr->attr.max_wr >= dev->mdev->caps.max_srq_wqes) { |
e126ba97 EC |
252 | mlx5_ib_dbg(dev, "max_wr %d, cap %d\n", |
253 | init_attr->attr.max_wr, | |
9603b61d | 254 | dev->mdev->caps.max_srq_wqes); |
e126ba97 EC |
255 | return ERR_PTR(-EINVAL); |
256 | } | |
257 | ||
258 | srq = kmalloc(sizeof(*srq), GFP_KERNEL); | |
259 | if (!srq) | |
260 | return ERR_PTR(-ENOMEM); | |
261 | ||
262 | mutex_init(&srq->mutex); | |
263 | spin_lock_init(&srq->lock); | |
264 | srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1); | |
265 | srq->msrq.max_gs = init_attr->attr.max_sge; | |
266 | ||
267 | desc_size = sizeof(struct mlx5_wqe_srq_next_seg) + | |
268 | srq->msrq.max_gs * sizeof(struct mlx5_wqe_data_seg); | |
269 | desc_size = roundup_pow_of_two(desc_size); | |
270 | desc_size = max_t(int, 32, desc_size); | |
271 | srq->msrq.max_avail_gather = (desc_size - sizeof(struct mlx5_wqe_srq_next_seg)) / | |
272 | sizeof(struct mlx5_wqe_data_seg); | |
273 | srq->msrq.wqe_shift = ilog2(desc_size); | |
274 | buf_size = srq->msrq.max * desc_size; | |
275 | mlx5_ib_dbg(dev, "desc_size 0x%x, req wr 0x%x, srq size 0x%x, max_gs 0x%x, max_avail_gather 0x%x\n", | |
276 | desc_size, init_attr->attr.max_wr, srq->msrq.max, srq->msrq.max_gs, | |
277 | srq->msrq.max_avail_gather); | |
278 | ||
279 | if (pd->uobject) | |
280 | err = create_srq_user(pd, srq, &in, udata, buf_size, &inlen); | |
281 | else | |
282 | err = create_srq_kernel(dev, srq, &in, buf_size, &inlen); | |
283 | ||
284 | if (err) { | |
285 | mlx5_ib_warn(dev, "create srq %s failed, err %d\n", | |
286 | pd->uobject ? "user" : "kernel", err); | |
287 | goto err_srq; | |
288 | } | |
289 | ||
290 | is_xrc = (init_attr->srq_type == IB_SRQT_XRC); | |
291 | in->ctx.state_log_sz = ilog2(srq->msrq.max); | |
292 | flgs = ((srq->msrq.wqe_shift - 4) | (is_xrc << 5) | (srq->wq_sig << 7)) << 24; | |
293 | xrcdn = 0; | |
294 | if (is_xrc) { | |
295 | xrcdn = to_mxrcd(init_attr->ext.xrc.xrcd)->xrcdn; | |
296 | in->ctx.pgoff_cqn |= cpu_to_be32(to_mcq(init_attr->ext.xrc.cq)->mcq.cqn); | |
297 | } else if (init_attr->srq_type == IB_SRQT_BASIC) { | |
298 | xrcdn = to_mxrcd(dev->devr.x0)->xrcdn; | |
299 | in->ctx.pgoff_cqn |= cpu_to_be32(to_mcq(dev->devr.c0)->mcq.cqn); | |
300 | } | |
301 | ||
302 | in->ctx.flags_xrcd = cpu_to_be32((flgs & 0xFF000000) | (xrcdn & 0xFFFFFF)); | |
303 | ||
304 | in->ctx.pd = cpu_to_be32(to_mpd(pd)->pdn); | |
305 | in->ctx.db_record = cpu_to_be64(srq->db.dma); | |
9603b61d | 306 | err = mlx5_core_create_srq(dev->mdev, &srq->msrq, in, inlen); |
e126ba97 EC |
307 | mlx5_vfree(in); |
308 | if (err) { | |
309 | mlx5_ib_dbg(dev, "create SRQ failed, err %d\n", err); | |
56e1ab0f | 310 | goto err_usr_kern_srq; |
e126ba97 EC |
311 | } |
312 | ||
313 | mlx5_ib_dbg(dev, "create SRQ with srqn 0x%x\n", srq->msrq.srqn); | |
314 | ||
315 | srq->msrq.event = mlx5_ib_srq_event; | |
316 | srq->ibsrq.ext.xrc.srq_num = srq->msrq.srqn; | |
317 | ||
318 | if (pd->uobject) | |
319 | if (ib_copy_to_udata(udata, &srq->msrq.srqn, sizeof(__u32))) { | |
320 | mlx5_ib_dbg(dev, "copy to user failed\n"); | |
321 | err = -EFAULT; | |
322 | goto err_core; | |
323 | } | |
324 | ||
325 | init_attr->attr.max_wr = srq->msrq.max - 1; | |
326 | ||
327 | return &srq->ibsrq; | |
328 | ||
329 | err_core: | |
9603b61d | 330 | mlx5_core_destroy_srq(dev->mdev, &srq->msrq); |
56e1ab0f ML |
331 | |
332 | err_usr_kern_srq: | |
e126ba97 EC |
333 | if (pd->uobject) |
334 | destroy_srq_user(pd, srq); | |
335 | else | |
336 | destroy_srq_kernel(dev, srq); | |
337 | ||
338 | err_srq: | |
339 | kfree(srq); | |
340 | ||
341 | return ERR_PTR(err); | |
342 | } | |
343 | ||
344 | int mlx5_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, | |
345 | enum ib_srq_attr_mask attr_mask, struct ib_udata *udata) | |
346 | { | |
347 | struct mlx5_ib_dev *dev = to_mdev(ibsrq->device); | |
348 | struct mlx5_ib_srq *srq = to_msrq(ibsrq); | |
349 | int ret; | |
350 | ||
351 | /* We don't support resizing SRQs yet */ | |
352 | if (attr_mask & IB_SRQ_MAX_WR) | |
353 | return -EINVAL; | |
354 | ||
355 | if (attr_mask & IB_SRQ_LIMIT) { | |
356 | if (attr->srq_limit >= srq->msrq.max) | |
357 | return -EINVAL; | |
358 | ||
359 | mutex_lock(&srq->mutex); | |
9603b61d | 360 | ret = mlx5_core_arm_srq(dev->mdev, &srq->msrq, attr->srq_limit, 1); |
e126ba97 EC |
361 | mutex_unlock(&srq->mutex); |
362 | ||
363 | if (ret) | |
364 | return ret; | |
365 | } | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | int mlx5_ib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr) | |
371 | { | |
372 | struct mlx5_ib_dev *dev = to_mdev(ibsrq->device); | |
373 | struct mlx5_ib_srq *srq = to_msrq(ibsrq); | |
374 | int ret; | |
375 | struct mlx5_query_srq_mbox_out *out; | |
376 | ||
377 | out = kzalloc(sizeof(*out), GFP_KERNEL); | |
378 | if (!out) | |
379 | return -ENOMEM; | |
380 | ||
9603b61d | 381 | ret = mlx5_core_query_srq(dev->mdev, &srq->msrq, out); |
e126ba97 EC |
382 | if (ret) |
383 | goto out_box; | |
384 | ||
385 | srq_attr->srq_limit = be16_to_cpu(out->ctx.lwm); | |
386 | srq_attr->max_wr = srq->msrq.max - 1; | |
387 | srq_attr->max_sge = srq->msrq.max_gs; | |
388 | ||
389 | out_box: | |
390 | kfree(out); | |
391 | return ret; | |
392 | } | |
393 | ||
394 | int mlx5_ib_destroy_srq(struct ib_srq *srq) | |
395 | { | |
396 | struct mlx5_ib_dev *dev = to_mdev(srq->device); | |
397 | struct mlx5_ib_srq *msrq = to_msrq(srq); | |
398 | ||
9603b61d | 399 | mlx5_core_destroy_srq(dev->mdev, &msrq->msrq); |
e126ba97 EC |
400 | |
401 | if (srq->uobject) { | |
402 | mlx5_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db); | |
403 | ib_umem_release(msrq->umem); | |
404 | } else { | |
1faacf82 | 405 | destroy_srq_kernel(dev, msrq); |
e126ba97 EC |
406 | } |
407 | ||
408 | kfree(srq); | |
409 | return 0; | |
410 | } | |
411 | ||
412 | void mlx5_ib_free_srq_wqe(struct mlx5_ib_srq *srq, int wqe_index) | |
413 | { | |
414 | struct mlx5_wqe_srq_next_seg *next; | |
415 | ||
416 | /* always called with interrupts disabled. */ | |
417 | spin_lock(&srq->lock); | |
418 | ||
419 | next = get_wqe(srq, srq->tail); | |
420 | next->next_wqe_index = cpu_to_be16(wqe_index); | |
421 | srq->tail = wqe_index; | |
422 | ||
423 | spin_unlock(&srq->lock); | |
424 | } | |
425 | ||
426 | int mlx5_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, | |
427 | struct ib_recv_wr **bad_wr) | |
428 | { | |
429 | struct mlx5_ib_srq *srq = to_msrq(ibsrq); | |
430 | struct mlx5_wqe_srq_next_seg *next; | |
431 | struct mlx5_wqe_data_seg *scat; | |
432 | unsigned long flags; | |
433 | int err = 0; | |
434 | int nreq; | |
435 | int i; | |
436 | ||
437 | spin_lock_irqsave(&srq->lock, flags); | |
438 | ||
439 | for (nreq = 0; wr; nreq++, wr = wr->next) { | |
440 | if (unlikely(wr->num_sge > srq->msrq.max_gs)) { | |
441 | err = -EINVAL; | |
442 | *bad_wr = wr; | |
443 | break; | |
444 | } | |
445 | ||
446 | if (unlikely(srq->head == srq->tail)) { | |
447 | err = -ENOMEM; | |
448 | *bad_wr = wr; | |
449 | break; | |
450 | } | |
451 | ||
452 | srq->wrid[srq->head] = wr->wr_id; | |
453 | ||
454 | next = get_wqe(srq, srq->head); | |
455 | srq->head = be16_to_cpu(next->next_wqe_index); | |
456 | scat = (struct mlx5_wqe_data_seg *)(next + 1); | |
457 | ||
458 | for (i = 0; i < wr->num_sge; i++) { | |
459 | scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length); | |
460 | scat[i].lkey = cpu_to_be32(wr->sg_list[i].lkey); | |
461 | scat[i].addr = cpu_to_be64(wr->sg_list[i].addr); | |
462 | } | |
463 | ||
464 | if (i < srq->msrq.max_avail_gather) { | |
465 | scat[i].byte_count = 0; | |
466 | scat[i].lkey = cpu_to_be32(MLX5_INVALID_LKEY); | |
467 | scat[i].addr = 0; | |
468 | } | |
469 | } | |
470 | ||
471 | if (likely(nreq)) { | |
472 | srq->wqe_ctr += nreq; | |
473 | ||
474 | /* Make sure that descriptors are written before | |
475 | * doorbell record. | |
476 | */ | |
477 | wmb(); | |
478 | ||
479 | *srq->db.db = cpu_to_be32(srq->wqe_ctr); | |
480 | } | |
481 | ||
482 | spin_unlock_irqrestore(&srq->lock, flags); | |
483 | ||
484 | return err; | |
485 | } |