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225c7b1f RD |
1 | /* |
2 | * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. | |
51a379d0 | 3 | * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. |
225c7b1f RD |
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/mlx4/qp.h> | |
35 | #include <linux/mlx4/srq.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
225c7b1f RD |
37 | |
38 | #include "mlx4_ib.h" | |
9ce28a20 | 39 | #include <rdma/mlx4-abi.h> |
89944450 | 40 | #include <rdma/uverbs_ioctl.h> |
225c7b1f RD |
41 | |
42 | static void *get_wqe(struct mlx4_ib_srq *srq, int n) | |
43 | { | |
1c69fc2a | 44 | return mlx4_buf_offset(&srq->buf, n << srq->msrq.wqe_shift); |
225c7b1f RD |
45 | } |
46 | ||
47 | static void mlx4_ib_srq_event(struct mlx4_srq *srq, enum mlx4_event type) | |
48 | { | |
49 | struct ib_event event; | |
50 | struct ib_srq *ibsrq = &to_mibsrq(srq)->ibsrq; | |
51 | ||
52 | if (ibsrq->event_handler) { | |
53 | event.device = ibsrq->device; | |
54 | event.element.srq = ibsrq; | |
55 | switch (type) { | |
56 | case MLX4_EVENT_TYPE_SRQ_LIMIT: | |
57 | event.event = IB_EVENT_SRQ_LIMIT_REACHED; | |
58 | break; | |
59 | case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR: | |
60 | event.event = IB_EVENT_SRQ_ERR; | |
61 | break; | |
62 | default: | |
987c8f8f | 63 | pr_warn("Unexpected event type %d " |
225c7b1f RD |
64 | "on SRQ %06x\n", type, srq->srqn); |
65 | return; | |
66 | } | |
67 | ||
68 | ibsrq->event_handler(&event, ibsrq->srq_context); | |
69 | } | |
70 | } | |
71 | ||
72 | struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd, | |
73 | struct ib_srq_init_attr *init_attr, | |
74 | struct ib_udata *udata) | |
75 | { | |
76 | struct mlx4_ib_dev *dev = to_mdev(pd->device); | |
89944450 SR |
77 | struct mlx4_ib_ucontext *ucontext = rdma_udata_to_drv_context( |
78 | udata, struct mlx4_ib_ucontext, ibucontext); | |
225c7b1f RD |
79 | struct mlx4_ib_srq *srq; |
80 | struct mlx4_wqe_srq_next_seg *next; | |
4c425588 | 81 | struct mlx4_wqe_data_seg *scatter; |
18abd5ea SH |
82 | u32 cqn; |
83 | u16 xrcdn; | |
225c7b1f RD |
84 | int desc_size; |
85 | int buf_size; | |
86 | int err; | |
87 | int i; | |
88 | ||
89 | /* Sanity check SRQ size before proceeding */ | |
90 | if (init_attr->attr.max_wr >= dev->dev->caps.max_srq_wqes || | |
91 | init_attr->attr.max_sge > dev->dev->caps.max_srq_sge) | |
92 | return ERR_PTR(-EINVAL); | |
93 | ||
94 | srq = kmalloc(sizeof *srq, GFP_KERNEL); | |
95 | if (!srq) | |
96 | return ERR_PTR(-ENOMEM); | |
97 | ||
98 | mutex_init(&srq->mutex); | |
99 | spin_lock_init(&srq->lock); | |
100 | srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1); | |
101 | srq->msrq.max_gs = init_attr->attr.max_sge; | |
102 | ||
103 | desc_size = max(32UL, | |
104 | roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) + | |
105 | srq->msrq.max_gs * | |
106 | sizeof (struct mlx4_wqe_data_seg))); | |
107 | srq->msrq.wqe_shift = ilog2(desc_size); | |
108 | ||
109 | buf_size = srq->msrq.max * desc_size; | |
110 | ||
e00b64f7 | 111 | if (udata) { |
225c7b1f RD |
112 | struct mlx4_ib_create_srq ucmd; |
113 | ||
114 | if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { | |
115 | err = -EFAULT; | |
116 | goto err_srq; | |
117 | } | |
118 | ||
b0ea0fa5 | 119 | srq->umem = ib_umem_get(udata, ucmd.buf_addr, buf_size, 0, 0); |
225c7b1f RD |
120 | if (IS_ERR(srq->umem)) { |
121 | err = PTR_ERR(srq->umem); | |
122 | goto err_srq; | |
123 | } | |
124 | ||
125 | err = mlx4_mtt_init(dev->dev, ib_umem_page_count(srq->umem), | |
3e7e1193 | 126 | srq->umem->page_shift, &srq->mtt); |
225c7b1f RD |
127 | if (err) |
128 | goto err_buf; | |
129 | ||
130 | err = mlx4_ib_umem_write_mtt(dev, &srq->mtt, srq->umem); | |
131 | if (err) | |
132 | goto err_mtt; | |
133 | ||
89944450 SR |
134 | err = mlx4_ib_db_map_user(ucontext, udata, ucmd.db_addr, |
135 | &srq->db); | |
225c7b1f RD |
136 | if (err) |
137 | goto err_mtt; | |
138 | } else { | |
8900b894 | 139 | err = mlx4_db_alloc(dev->dev, &srq->db, 0); |
225c7b1f RD |
140 | if (err) |
141 | goto err_srq; | |
142 | ||
143 | *srq->db.db = 0; | |
144 | ||
8900b894 LR |
145 | if (mlx4_buf_alloc(dev->dev, buf_size, PAGE_SIZE * 2, |
146 | &srq->buf)) { | |
225c7b1f RD |
147 | err = -ENOMEM; |
148 | goto err_db; | |
149 | } | |
150 | ||
151 | srq->head = 0; | |
152 | srq->tail = srq->msrq.max - 1; | |
153 | srq->wqe_ctr = 0; | |
154 | ||
155 | for (i = 0; i < srq->msrq.max; ++i) { | |
156 | next = get_wqe(srq, i); | |
157 | next->next_wqe_index = | |
158 | cpu_to_be16((i + 1) & (srq->msrq.max - 1)); | |
4c425588 JM |
159 | |
160 | for (scatter = (void *) (next + 1); | |
161 | (void *) scatter < (void *) next + desc_size; | |
162 | ++scatter) | |
163 | scatter->lkey = cpu_to_be32(MLX4_INVALID_LKEY); | |
225c7b1f RD |
164 | } |
165 | ||
166 | err = mlx4_mtt_init(dev->dev, srq->buf.npages, srq->buf.page_shift, | |
167 | &srq->mtt); | |
168 | if (err) | |
169 | goto err_buf; | |
170 | ||
8900b894 | 171 | err = mlx4_buf_write_mtt(dev->dev, &srq->mtt, &srq->buf); |
225c7b1f RD |
172 | if (err) |
173 | goto err_mtt; | |
174 | ||
e9105cde LD |
175 | srq->wrid = kvmalloc_array(srq->msrq.max, |
176 | sizeof(u64), GFP_KERNEL); | |
225c7b1f | 177 | if (!srq->wrid) { |
e9105cde LD |
178 | err = -ENOMEM; |
179 | goto err_mtt; | |
225c7b1f RD |
180 | } |
181 | } | |
182 | ||
1a56ff6d AK |
183 | cqn = ib_srq_has_cq(init_attr->srq_type) ? |
184 | to_mcq(init_attr->ext.cq)->mcq.cqn : 0; | |
18abd5ea SH |
185 | xrcdn = (init_attr->srq_type == IB_SRQT_XRC) ? |
186 | to_mxrcd(init_attr->ext.xrc.xrcd)->xrcdn : | |
187 | (u16) dev->dev->caps.reserved_xrcds; | |
188 | err = mlx4_srq_alloc(dev->dev, to_mpd(pd)->pdn, cqn, xrcdn, &srq->mtt, | |
225c7b1f RD |
189 | srq->db.dma, &srq->msrq); |
190 | if (err) | |
191 | goto err_wrid; | |
192 | ||
193 | srq->msrq.event = mlx4_ib_srq_event; | |
18abd5ea | 194 | srq->ibsrq.ext.xrc.srq_num = srq->msrq.srqn; |
225c7b1f | 195 | |
e00b64f7 | 196 | if (udata) |
225c7b1f RD |
197 | if (ib_copy_to_udata(udata, &srq->msrq.srqn, sizeof (__u32))) { |
198 | err = -EFAULT; | |
199 | goto err_wrid; | |
200 | } | |
201 | ||
202 | init_attr->attr.max_wr = srq->msrq.max - 1; | |
203 | ||
204 | return &srq->ibsrq; | |
205 | ||
206 | err_wrid: | |
e00b64f7 | 207 | if (udata) |
89944450 | 208 | mlx4_ib_db_unmap_user(ucontext, &srq->db); |
225c7b1f | 209 | else |
0ef2f05c | 210 | kvfree(srq->wrid); |
225c7b1f RD |
211 | |
212 | err_mtt: | |
213 | mlx4_mtt_cleanup(dev->dev, &srq->mtt); | |
214 | ||
215 | err_buf: | |
e00b64f7 | 216 | if (srq->umem) |
225c7b1f RD |
217 | ib_umem_release(srq->umem); |
218 | else | |
219 | mlx4_buf_free(dev->dev, buf_size, &srq->buf); | |
220 | ||
221 | err_db: | |
e00b64f7 | 222 | if (!udata) |
6296883c | 223 | mlx4_db_free(dev->dev, &srq->db); |
225c7b1f RD |
224 | |
225 | err_srq: | |
226 | kfree(srq); | |
227 | ||
228 | return ERR_PTR(err); | |
229 | } | |
230 | ||
231 | int mlx4_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, | |
232 | enum ib_srq_attr_mask attr_mask, struct ib_udata *udata) | |
233 | { | |
234 | struct mlx4_ib_dev *dev = to_mdev(ibsrq->device); | |
235 | struct mlx4_ib_srq *srq = to_msrq(ibsrq); | |
236 | int ret; | |
237 | ||
238 | /* We don't support resizing SRQs (yet?) */ | |
239 | if (attr_mask & IB_SRQ_MAX_WR) | |
240 | return -EINVAL; | |
241 | ||
242 | if (attr_mask & IB_SRQ_LIMIT) { | |
243 | if (attr->srq_limit >= srq->msrq.max) | |
244 | return -EINVAL; | |
245 | ||
246 | mutex_lock(&srq->mutex); | |
247 | ret = mlx4_srq_arm(dev->dev, &srq->msrq, attr->srq_limit); | |
248 | mutex_unlock(&srq->mutex); | |
249 | ||
250 | if (ret) | |
251 | return ret; | |
252 | } | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
65541cb7 JM |
257 | int mlx4_ib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr) |
258 | { | |
259 | struct mlx4_ib_dev *dev = to_mdev(ibsrq->device); | |
260 | struct mlx4_ib_srq *srq = to_msrq(ibsrq); | |
261 | int ret; | |
262 | int limit_watermark; | |
263 | ||
264 | ret = mlx4_srq_query(dev->dev, &srq->msrq, &limit_watermark); | |
265 | if (ret) | |
266 | return ret; | |
267 | ||
d7dc3ccb | 268 | srq_attr->srq_limit = limit_watermark; |
65541cb7 JM |
269 | srq_attr->max_wr = srq->msrq.max - 1; |
270 | srq_attr->max_sge = srq->msrq.max_gs; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
225c7b1f RD |
275 | int mlx4_ib_destroy_srq(struct ib_srq *srq) |
276 | { | |
277 | struct mlx4_ib_dev *dev = to_mdev(srq->device); | |
278 | struct mlx4_ib_srq *msrq = to_msrq(srq); | |
279 | ||
280 | mlx4_srq_free(dev->dev, &msrq->msrq); | |
281 | mlx4_mtt_cleanup(dev->dev, &msrq->mtt); | |
282 | ||
283 | if (srq->uobject) { | |
284 | mlx4_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db); | |
285 | ib_umem_release(msrq->umem); | |
286 | } else { | |
df417667 | 287 | kvfree(msrq->wrid); |
225c7b1f RD |
288 | mlx4_buf_free(dev->dev, msrq->msrq.max << msrq->msrq.wqe_shift, |
289 | &msrq->buf); | |
6296883c | 290 | mlx4_db_free(dev->dev, &msrq->db); |
225c7b1f RD |
291 | } |
292 | ||
293 | kfree(msrq); | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
298 | void mlx4_ib_free_srq_wqe(struct mlx4_ib_srq *srq, int wqe_index) | |
299 | { | |
300 | struct mlx4_wqe_srq_next_seg *next; | |
301 | ||
302 | /* always called with interrupts disabled. */ | |
303 | spin_lock(&srq->lock); | |
304 | ||
305 | next = get_wqe(srq, srq->tail); | |
306 | next->next_wqe_index = cpu_to_be16(wqe_index); | |
307 | srq->tail = wqe_index; | |
308 | ||
309 | spin_unlock(&srq->lock); | |
310 | } | |
311 | ||
d34ac5cd BVA |
312 | int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, |
313 | const struct ib_recv_wr **bad_wr) | |
225c7b1f RD |
314 | { |
315 | struct mlx4_ib_srq *srq = to_msrq(ibsrq); | |
316 | struct mlx4_wqe_srq_next_seg *next; | |
317 | struct mlx4_wqe_data_seg *scat; | |
318 | unsigned long flags; | |
319 | int err = 0; | |
320 | int nreq; | |
321 | int i; | |
35f05dab | 322 | struct mlx4_ib_dev *mdev = to_mdev(ibsrq->device); |
225c7b1f RD |
323 | |
324 | spin_lock_irqsave(&srq->lock, flags); | |
35f05dab YH |
325 | if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) { |
326 | err = -EIO; | |
327 | *bad_wr = wr; | |
328 | nreq = 0; | |
329 | goto out; | |
330 | } | |
225c7b1f RD |
331 | |
332 | for (nreq = 0; wr; ++nreq, wr = wr->next) { | |
333 | if (unlikely(wr->num_sge > srq->msrq.max_gs)) { | |
334 | err = -EINVAL; | |
335 | *bad_wr = wr; | |
336 | break; | |
337 | } | |
338 | ||
56a8c8b6 RD |
339 | if (unlikely(srq->head == srq->tail)) { |
340 | err = -ENOMEM; | |
341 | *bad_wr = wr; | |
342 | break; | |
343 | } | |
344 | ||
225c7b1f RD |
345 | srq->wrid[srq->head] = wr->wr_id; |
346 | ||
347 | next = get_wqe(srq, srq->head); | |
348 | srq->head = be16_to_cpu(next->next_wqe_index); | |
349 | scat = (struct mlx4_wqe_data_seg *) (next + 1); | |
350 | ||
351 | for (i = 0; i < wr->num_sge; ++i) { | |
352 | scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length); | |
353 | scat[i].lkey = cpu_to_be32(wr->sg_list[i].lkey); | |
354 | scat[i].addr = cpu_to_be64(wr->sg_list[i].addr); | |
355 | } | |
356 | ||
357 | if (i < srq->msrq.max_gs) { | |
358 | scat[i].byte_count = 0; | |
359 | scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY); | |
360 | scat[i].addr = 0; | |
361 | } | |
362 | } | |
363 | ||
364 | if (likely(nreq)) { | |
365 | srq->wqe_ctr += nreq; | |
366 | ||
367 | /* | |
368 | * Make sure that descriptors are written before | |
369 | * doorbell record. | |
370 | */ | |
371 | wmb(); | |
372 | ||
373 | *srq->db.db = cpu_to_be32(srq->wqe_ctr); | |
374 | } | |
35f05dab | 375 | out: |
225c7b1f RD |
376 | |
377 | spin_unlock_irqrestore(&srq->lock, flags); | |
378 | ||
379 | return err; | |
380 | } |