Commit | Line | Data |
---|---|---|
f94b533d TT |
1 | /* |
2 | * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. | |
3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
4 | * Copyright (c) 2005 Cisco Systems, Inc. All rights reserved. | |
5 | * Copyright (c) 2005 Mellanox Technologies. All rights reserved. | |
6 | * Copyright (c) 2004 Voltaire, Inc. All rights reserved. | |
7 | * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved. | |
8 | * | |
9 | * This software is available to you under a choice of one of two | |
10 | * licenses. You may choose to be licensed under the terms of the GNU | |
11 | * General Public License (GPL) Version 2, available from the file | |
12 | * COPYING in the main directory of this source tree, or the | |
13 | * OpenIB.org BSD license below: | |
14 | * | |
15 | * Redistribution and use in source and binary forms, with or | |
16 | * without modification, are permitted provided that the following | |
17 | * conditions are met: | |
18 | * | |
19 | * - Redistributions of source code must retain the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer. | |
22 | * | |
23 | * - Redistributions in binary form must reproduce the above | |
24 | * copyright notice, this list of conditions and the following | |
25 | * disclaimer in the documentation and/or other materials | |
26 | * provided with the distribution. | |
27 | * | |
28 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
29 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
30 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
31 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
32 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
33 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
34 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
35 | * SOFTWARE. | |
36 | * | |
37 | */ | |
38 | #include "c2.h" | |
39 | #include "c2_vq.h" | |
40 | #include "c2_status.h" | |
41 | ||
42 | #define C2_CQ_MSG_SIZE ((sizeof(struct c2wr_ce) + 32-1) & ~(32-1)) | |
43 | ||
44 | static struct c2_cq *c2_cq_get(struct c2_dev *c2dev, int cqn) | |
45 | { | |
46 | struct c2_cq *cq; | |
47 | unsigned long flags; | |
48 | ||
49 | spin_lock_irqsave(&c2dev->lock, flags); | |
50 | cq = c2dev->qptr_array[cqn]; | |
51 | if (!cq) { | |
52 | spin_unlock_irqrestore(&c2dev->lock, flags); | |
53 | return NULL; | |
54 | } | |
55 | atomic_inc(&cq->refcount); | |
56 | spin_unlock_irqrestore(&c2dev->lock, flags); | |
57 | return cq; | |
58 | } | |
59 | ||
60 | static void c2_cq_put(struct c2_cq *cq) | |
61 | { | |
62 | if (atomic_dec_and_test(&cq->refcount)) | |
63 | wake_up(&cq->wait); | |
64 | } | |
65 | ||
66 | void c2_cq_event(struct c2_dev *c2dev, u32 mq_index) | |
67 | { | |
68 | struct c2_cq *cq; | |
69 | ||
70 | cq = c2_cq_get(c2dev, mq_index); | |
71 | if (!cq) { | |
72 | printk("discarding events on destroyed CQN=%d\n", mq_index); | |
73 | return; | |
74 | } | |
75 | ||
76 | (*cq->ibcq.comp_handler) (&cq->ibcq, cq->ibcq.cq_context); | |
77 | c2_cq_put(cq); | |
78 | } | |
79 | ||
80 | void c2_cq_clean(struct c2_dev *c2dev, struct c2_qp *qp, u32 mq_index) | |
81 | { | |
82 | struct c2_cq *cq; | |
83 | struct c2_mq *q; | |
84 | ||
85 | cq = c2_cq_get(c2dev, mq_index); | |
86 | if (!cq) | |
87 | return; | |
88 | ||
89 | spin_lock_irq(&cq->lock); | |
90 | q = &cq->mq; | |
91 | if (q && !c2_mq_empty(q)) { | |
92 | u16 priv = q->priv; | |
93 | struct c2wr_ce *msg; | |
94 | ||
95 | while (priv != be16_to_cpu(*q->shared)) { | |
96 | msg = (struct c2wr_ce *) | |
97 | (q->msg_pool.host + priv * q->msg_size); | |
98 | if (msg->qp_user_context == (u64) (unsigned long) qp) { | |
99 | msg->qp_user_context = (u64) 0; | |
100 | } | |
101 | priv = (priv + 1) % q->q_size; | |
102 | } | |
103 | } | |
104 | spin_unlock_irq(&cq->lock); | |
105 | c2_cq_put(cq); | |
106 | } | |
107 | ||
108 | static inline enum ib_wc_status c2_cqe_status_to_openib(u8 status) | |
109 | { | |
110 | switch (status) { | |
111 | case C2_OK: | |
112 | return IB_WC_SUCCESS; | |
113 | case CCERR_FLUSHED: | |
114 | return IB_WC_WR_FLUSH_ERR; | |
115 | case CCERR_BASE_AND_BOUNDS_VIOLATION: | |
116 | return IB_WC_LOC_PROT_ERR; | |
117 | case CCERR_ACCESS_VIOLATION: | |
118 | return IB_WC_LOC_ACCESS_ERR; | |
119 | case CCERR_TOTAL_LENGTH_TOO_BIG: | |
120 | return IB_WC_LOC_LEN_ERR; | |
121 | case CCERR_INVALID_WINDOW: | |
122 | return IB_WC_MW_BIND_ERR; | |
123 | default: | |
124 | return IB_WC_GENERAL_ERR; | |
125 | } | |
126 | } | |
127 | ||
128 | ||
129 | static inline int c2_poll_one(struct c2_dev *c2dev, | |
130 | struct c2_cq *cq, struct ib_wc *entry) | |
131 | { | |
132 | struct c2wr_ce *ce; | |
133 | struct c2_qp *qp; | |
134 | int is_recv = 0; | |
135 | ||
5b891a93 | 136 | ce = c2_mq_consume(&cq->mq); |
f94b533d TT |
137 | if (!ce) { |
138 | return -EAGAIN; | |
139 | } | |
140 | ||
141 | /* | |
142 | * if the qp returned is null then this qp has already | |
143 | * been freed and we are unable process the completion. | |
144 | * try pulling the next message | |
145 | */ | |
146 | while ((qp = | |
147 | (struct c2_qp *) (unsigned long) ce->qp_user_context) == NULL) { | |
148 | c2_mq_free(&cq->mq); | |
5b891a93 | 149 | ce = c2_mq_consume(&cq->mq); |
f94b533d TT |
150 | if (!ce) |
151 | return -EAGAIN; | |
152 | } | |
153 | ||
154 | entry->status = c2_cqe_status_to_openib(c2_wr_get_result(ce)); | |
155 | entry->wr_id = ce->hdr.context; | |
062dbb69 | 156 | entry->qp = &qp->ibqp; |
f94b533d TT |
157 | entry->wc_flags = 0; |
158 | entry->slid = 0; | |
159 | entry->sl = 0; | |
160 | entry->src_qp = 0; | |
161 | entry->dlid_path_bits = 0; | |
162 | entry->pkey_index = 0; | |
163 | ||
164 | switch (c2_wr_get_id(ce)) { | |
165 | case C2_WR_TYPE_SEND: | |
166 | entry->opcode = IB_WC_SEND; | |
167 | break; | |
168 | case C2_WR_TYPE_RDMA_WRITE: | |
169 | entry->opcode = IB_WC_RDMA_WRITE; | |
170 | break; | |
171 | case C2_WR_TYPE_RDMA_READ: | |
172 | entry->opcode = IB_WC_RDMA_READ; | |
173 | break; | |
174 | case C2_WR_TYPE_BIND_MW: | |
175 | entry->opcode = IB_WC_BIND_MW; | |
176 | break; | |
177 | case C2_WR_TYPE_RECV: | |
178 | entry->byte_len = be32_to_cpu(ce->bytes_rcvd); | |
179 | entry->opcode = IB_WC_RECV; | |
180 | is_recv = 1; | |
181 | break; | |
182 | default: | |
183 | break; | |
184 | } | |
185 | ||
186 | /* consume the WQEs */ | |
187 | if (is_recv) | |
188 | c2_mq_lconsume(&qp->rq_mq, 1); | |
189 | else | |
190 | c2_mq_lconsume(&qp->sq_mq, | |
191 | be32_to_cpu(c2_wr_get_wqe_count(ce)) + 1); | |
192 | ||
193 | /* free the message */ | |
194 | c2_mq_free(&cq->mq); | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | int c2_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry) | |
200 | { | |
201 | struct c2_dev *c2dev = to_c2dev(ibcq->device); | |
202 | struct c2_cq *cq = to_c2cq(ibcq); | |
203 | unsigned long flags; | |
204 | int npolled, err; | |
205 | ||
206 | spin_lock_irqsave(&cq->lock, flags); | |
207 | ||
208 | for (npolled = 0; npolled < num_entries; ++npolled) { | |
209 | ||
210 | err = c2_poll_one(c2dev, cq, entry + npolled); | |
211 | if (err) | |
212 | break; | |
213 | } | |
214 | ||
215 | spin_unlock_irqrestore(&cq->lock, flags); | |
216 | ||
217 | return npolled; | |
218 | } | |
219 | ||
ed23a727 | 220 | int c2_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags) |
f94b533d TT |
221 | { |
222 | struct c2_mq_shared __iomem *shared; | |
223 | struct c2_cq *cq; | |
ed23a727 RD |
224 | unsigned long flags; |
225 | int ret = 0; | |
f94b533d TT |
226 | |
227 | cq = to_c2cq(ibcq); | |
228 | shared = cq->mq.peer; | |
229 | ||
ed23a727 | 230 | if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP) |
f94b533d | 231 | writeb(C2_CQ_NOTIFICATION_TYPE_NEXT, &shared->notification_type); |
ed23a727 | 232 | else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED) |
f94b533d TT |
233 | writeb(C2_CQ_NOTIFICATION_TYPE_NEXT_SE, &shared->notification_type); |
234 | else | |
235 | return -EINVAL; | |
236 | ||
237 | writeb(CQ_WAIT_FOR_DMA | CQ_ARMED, &shared->armed); | |
238 | ||
239 | /* | |
240 | * Now read back shared->armed to make the PCI | |
241 | * write synchronous. This is necessary for | |
242 | * correct cq notification semantics. | |
243 | */ | |
244 | readb(&shared->armed); | |
245 | ||
ed23a727 RD |
246 | if (notify_flags & IB_CQ_REPORT_MISSED_EVENTS) { |
247 | spin_lock_irqsave(&cq->lock, flags); | |
248 | ret = !c2_mq_empty(&cq->mq); | |
249 | spin_unlock_irqrestore(&cq->lock, flags); | |
250 | } | |
251 | ||
252 | return ret; | |
f94b533d TT |
253 | } |
254 | ||
255 | static void c2_free_cq_buf(struct c2_dev *c2dev, struct c2_mq *mq) | |
256 | { | |
8de94ce1 SW |
257 | dma_free_coherent(&c2dev->pcidev->dev, mq->q_size * mq->msg_size, |
258 | mq->msg_pool.host, pci_unmap_addr(mq, mapping)); | |
f94b533d TT |
259 | } |
260 | ||
261 | static int c2_alloc_cq_buf(struct c2_dev *c2dev, struct c2_mq *mq, int q_size, | |
262 | int msg_size) | |
263 | { | |
8de94ce1 | 264 | u8 *pool_start; |
f94b533d | 265 | |
8de94ce1 SW |
266 | pool_start = dma_alloc_coherent(&c2dev->pcidev->dev, q_size * msg_size, |
267 | &mq->host_dma, GFP_KERNEL); | |
f94b533d TT |
268 | if (!pool_start) |
269 | return -ENOMEM; | |
270 | ||
271 | c2_mq_rep_init(mq, | |
272 | 0, /* index (currently unknown) */ | |
273 | q_size, | |
274 | msg_size, | |
8de94ce1 | 275 | pool_start, |
f94b533d TT |
276 | NULL, /* peer (currently unknown) */ |
277 | C2_MQ_HOST_TARGET); | |
278 | ||
f94b533d TT |
279 | pci_unmap_addr_set(mq, mapping, mq->host_dma); |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | int c2_init_cq(struct c2_dev *c2dev, int entries, | |
285 | struct c2_ucontext *ctx, struct c2_cq *cq) | |
286 | { | |
287 | struct c2wr_cq_create_req wr; | |
288 | struct c2wr_cq_create_rep *reply; | |
289 | unsigned long peer_pa; | |
290 | struct c2_vq_req *vq_req; | |
291 | int err; | |
292 | ||
293 | might_sleep(); | |
294 | ||
295 | cq->ibcq.cqe = entries - 1; | |
296 | cq->is_kernel = !ctx; | |
297 | ||
298 | /* Allocate a shared pointer */ | |
299 | cq->mq.shared = c2_alloc_mqsp(c2dev, c2dev->kern_mqsp_pool, | |
300 | &cq->mq.shared_dma, GFP_KERNEL); | |
301 | if (!cq->mq.shared) | |
302 | return -ENOMEM; | |
303 | ||
304 | /* Allocate pages for the message pool */ | |
305 | err = c2_alloc_cq_buf(c2dev, &cq->mq, entries + 1, C2_CQ_MSG_SIZE); | |
306 | if (err) | |
307 | goto bail0; | |
308 | ||
309 | vq_req = vq_req_alloc(c2dev); | |
310 | if (!vq_req) { | |
311 | err = -ENOMEM; | |
312 | goto bail1; | |
313 | } | |
314 | ||
315 | memset(&wr, 0, sizeof(wr)); | |
316 | c2_wr_set_id(&wr, CCWR_CQ_CREATE); | |
317 | wr.hdr.context = (unsigned long) vq_req; | |
318 | wr.rnic_handle = c2dev->adapter_handle; | |
319 | wr.msg_size = cpu_to_be32(cq->mq.msg_size); | |
320 | wr.depth = cpu_to_be32(cq->mq.q_size); | |
321 | wr.shared_ht = cpu_to_be64(cq->mq.shared_dma); | |
322 | wr.msg_pool = cpu_to_be64(cq->mq.host_dma); | |
323 | wr.user_context = (u64) (unsigned long) (cq); | |
324 | ||
325 | vq_req_get(c2dev, vq_req); | |
326 | ||
327 | err = vq_send_wr(c2dev, (union c2wr *) & wr); | |
328 | if (err) { | |
329 | vq_req_put(c2dev, vq_req); | |
330 | goto bail2; | |
331 | } | |
332 | ||
333 | err = vq_wait_for_reply(c2dev, vq_req); | |
334 | if (err) | |
335 | goto bail2; | |
336 | ||
337 | reply = (struct c2wr_cq_create_rep *) (unsigned long) (vq_req->reply_msg); | |
338 | if (!reply) { | |
339 | err = -ENOMEM; | |
340 | goto bail2; | |
341 | } | |
342 | ||
343 | if ((err = c2_errno(reply)) != 0) | |
344 | goto bail3; | |
345 | ||
346 | cq->adapter_handle = reply->cq_handle; | |
347 | cq->mq.index = be32_to_cpu(reply->mq_index); | |
348 | ||
349 | peer_pa = c2dev->pa + be32_to_cpu(reply->adapter_shared); | |
350 | cq->mq.peer = ioremap_nocache(peer_pa, PAGE_SIZE); | |
351 | if (!cq->mq.peer) { | |
352 | err = -ENOMEM; | |
353 | goto bail3; | |
354 | } | |
355 | ||
356 | vq_repbuf_free(c2dev, reply); | |
357 | vq_req_free(c2dev, vq_req); | |
358 | ||
359 | spin_lock_init(&cq->lock); | |
360 | atomic_set(&cq->refcount, 1); | |
361 | init_waitqueue_head(&cq->wait); | |
362 | ||
363 | /* | |
364 | * Use the MQ index allocated by the adapter to | |
365 | * store the CQ in the qptr_array | |
366 | */ | |
367 | cq->cqn = cq->mq.index; | |
368 | c2dev->qptr_array[cq->cqn] = cq; | |
369 | ||
370 | return 0; | |
371 | ||
372 | bail3: | |
373 | vq_repbuf_free(c2dev, reply); | |
374 | bail2: | |
375 | vq_req_free(c2dev, vq_req); | |
376 | bail1: | |
377 | c2_free_cq_buf(c2dev, &cq->mq); | |
378 | bail0: | |
379 | c2_free_mqsp(cq->mq.shared); | |
380 | ||
381 | return err; | |
382 | } | |
383 | ||
384 | void c2_free_cq(struct c2_dev *c2dev, struct c2_cq *cq) | |
385 | { | |
386 | int err; | |
387 | struct c2_vq_req *vq_req; | |
388 | struct c2wr_cq_destroy_req wr; | |
389 | struct c2wr_cq_destroy_rep *reply; | |
390 | ||
391 | might_sleep(); | |
392 | ||
393 | /* Clear CQ from the qptr array */ | |
394 | spin_lock_irq(&c2dev->lock); | |
395 | c2dev->qptr_array[cq->mq.index] = NULL; | |
396 | atomic_dec(&cq->refcount); | |
397 | spin_unlock_irq(&c2dev->lock); | |
398 | ||
399 | wait_event(cq->wait, !atomic_read(&cq->refcount)); | |
400 | ||
401 | vq_req = vq_req_alloc(c2dev); | |
402 | if (!vq_req) { | |
403 | goto bail0; | |
404 | } | |
405 | ||
406 | memset(&wr, 0, sizeof(wr)); | |
407 | c2_wr_set_id(&wr, CCWR_CQ_DESTROY); | |
408 | wr.hdr.context = (unsigned long) vq_req; | |
409 | wr.rnic_handle = c2dev->adapter_handle; | |
410 | wr.cq_handle = cq->adapter_handle; | |
411 | ||
412 | vq_req_get(c2dev, vq_req); | |
413 | ||
414 | err = vq_send_wr(c2dev, (union c2wr *) & wr); | |
415 | if (err) { | |
416 | vq_req_put(c2dev, vq_req); | |
417 | goto bail1; | |
418 | } | |
419 | ||
420 | err = vq_wait_for_reply(c2dev, vq_req); | |
421 | if (err) | |
422 | goto bail1; | |
423 | ||
424 | reply = (struct c2wr_cq_destroy_rep *) (unsigned long) (vq_req->reply_msg); | |
9285faa1 TT |
425 | if (reply) |
426 | vq_repbuf_free(c2dev, reply); | |
f94b533d TT |
427 | bail1: |
428 | vq_req_free(c2dev, vq_req); | |
429 | bail0: | |
430 | if (cq->is_kernel) { | |
431 | c2_free_cq_buf(c2dev, &cq->mq); | |
432 | } | |
433 | ||
434 | return; | |
435 | } |