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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / infiniband / hw / mlx4 / cq.c
blob4521319b14067c22d576044c35bea72bcb2e3720
1 /*
2 * Copyright (c) 2007 Cisco Systems, 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/mlx4/cq.h>
34 #include <linux/mlx4/qp.h>
35
36 #include "mlx4_ib.h"
37 #include "user.h"
38
39 static void mlx4_ib_cq_comp(struct mlx4_cq *cq)
40 {
41 struct ib_cq *ibcq = &to_mibcq(cq)->ibcq;
42 ibcq->comp_handler(ibcq, ibcq->cq_context);
43 }
44
45 static void mlx4_ib_cq_event(struct mlx4_cq *cq, enum mlx4_event type)
46 {
47 struct ib_event event;
48 struct ib_cq *ibcq;
49
50 if (type != MLX4_EVENT_TYPE_CQ_ERROR) {
51 printk(KERN_WARNING "mlx4_ib: Unexpected event type %d "
52 "on CQ %06x\n", type, cq->cqn);
53 return;
54 }
55
56 ibcq = &to_mibcq(cq)->ibcq;
57 if (ibcq->event_handler) {
58 event.device = ibcq->device;
59 event.event = IB_EVENT_CQ_ERR;
60 event.element.cq = ibcq;
61 ibcq->event_handler(&event, ibcq->cq_context);
62 }
63 }
64
65 static void *get_cqe_from_buf(struct mlx4_ib_cq_buf *buf, int n)
66 {
67 return mlx4_buf_offset(&buf->buf, n * sizeof (struct mlx4_cqe));
68 }
69
70 static void *get_cqe(struct mlx4_ib_cq *cq, int n)
71 {
72 return get_cqe_from_buf(&cq->buf, n);
73 }
74
75 static void *get_sw_cqe(struct mlx4_ib_cq *cq, int n)
76 {
77 struct mlx4_cqe *cqe = get_cqe(cq, n & cq->ibcq.cqe);
78
79 return (!!(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK) ^
80 !!(n & (cq->ibcq.cqe + 1))) ? NULL : cqe;
81 }
82
83 static struct mlx4_cqe *next_cqe_sw(struct mlx4_ib_cq *cq)
84 {
85 return get_sw_cqe(cq, cq->mcq.cons_index);
86 }
87
88 int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
89 {
90 struct mlx4_ib_cq *mcq = to_mcq(cq);
91 struct mlx4_ib_dev *dev = to_mdev(cq->device);
92
93 return mlx4_cq_modify(dev->dev, &mcq->mcq, cq_count, cq_period);
94 }
95
96 static int mlx4_ib_alloc_cq_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq_buf *buf, int nent)
97 {
98 int err;
99
100 err = mlx4_buf_alloc(dev->dev, nent * sizeof(struct mlx4_cqe),
101 PAGE_SIZE * 2, &buf->buf);
102
103 if (err)
104 goto out;
105
106 err = mlx4_mtt_init(dev->dev, buf->buf.npages, buf->buf.page_shift,
107 &buf->mtt);
108 if (err)
109 goto err_buf;
110
111 err = mlx4_buf_write_mtt(dev->dev, &buf->mtt, &buf->buf);
112 if (err)
113 goto err_mtt;
114
115 return 0;
116
117 err_mtt:
118 mlx4_mtt_cleanup(dev->dev, &buf->mtt);
119
120 err_buf:
121 mlx4_buf_free(dev->dev, nent * sizeof(struct mlx4_cqe),
122 &buf->buf);
123
124 out:
125 return err;
126 }
127
128 static void mlx4_ib_free_cq_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq_buf *buf, int cqe)
129 {
130 mlx4_buf_free(dev->dev, (cqe + 1) * sizeof(struct mlx4_cqe), &buf->buf);
131 }
132
133 static int mlx4_ib_get_cq_umem(struct mlx4_ib_dev *dev, struct ib_ucontext *context,
134 struct mlx4_ib_cq_buf *buf, struct ib_umem **umem,
135 u64 buf_addr, int cqe)
136 {
137 int err;
138
139 *umem = ib_umem_get(context, buf_addr, cqe * sizeof (struct mlx4_cqe),
140 IB_ACCESS_LOCAL_WRITE, 1);
141 if (IS_ERR(*umem))
142 return PTR_ERR(*umem);
143
144 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(*umem),
145 ilog2((*umem)->page_size), &buf->mtt);
146 if (err)
147 goto err_buf;
148
149 err = mlx4_ib_umem_write_mtt(dev, &buf->mtt, *umem);
150 if (err)
151 goto err_mtt;
152
153 return 0;
154
155 err_mtt:
156 mlx4_mtt_cleanup(dev->dev, &buf->mtt);
157
158 err_buf:
159 ib_umem_release(*umem);
160
161 return err;
162 }
163
164 struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector,
165 struct ib_ucontext *context,
166 struct ib_udata *udata)
167 {
168 struct mlx4_ib_dev *dev = to_mdev(ibdev);
169 struct mlx4_ib_cq *cq;
170 struct mlx4_uar *uar;
171 int err;
172
173 if (entries < 1 || entries > dev->dev->caps.max_cqes)
174 return ERR_PTR(-EINVAL);
175
176 cq = kmalloc(sizeof *cq, GFP_KERNEL);
177 if (!cq)
178 return ERR_PTR(-ENOMEM);
179
180 entries = roundup_pow_of_two(entries + 1);
181 cq->ibcq.cqe = entries - 1;
182 mutex_init(&cq->resize_mutex);
183 spin_lock_init(&cq->lock);
184 cq->resize_buf = NULL;
185 cq->resize_umem = NULL;
186
187 if (context) {
188 struct mlx4_ib_create_cq ucmd;
189
190 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
191 err = -EFAULT;
192 goto err_cq;
193 }
194
195 err = mlx4_ib_get_cq_umem(dev, context, &cq->buf, &cq->umem,
196 ucmd.buf_addr, entries);
197 if (err)
198 goto err_cq;
199
200 err = mlx4_ib_db_map_user(to_mucontext(context), ucmd.db_addr,
201 &cq->db);
202 if (err)
203 goto err_mtt;
204
205 uar = &to_mucontext(context)->uar;
206 } else {
207 err = mlx4_db_alloc(dev->dev, &cq->db, 1);
208 if (err)
209 goto err_cq;
210
211 cq->mcq.set_ci_db = cq->db.db;
212 cq->mcq.arm_db = cq->db.db + 1;
213 *cq->mcq.set_ci_db = 0;
214 *cq->mcq.arm_db = 0;
215
216 err = mlx4_ib_alloc_cq_buf(dev, &cq->buf, entries);
217 if (err)
218 goto err_db;
219
220 uar = &dev->priv_uar;
221 }
222
223 err = mlx4_cq_alloc(dev->dev, entries, &cq->buf.mtt, uar,
224 cq->db.dma, &cq->mcq, 0);
225 if (err)
226 goto err_dbmap;
227
228 cq->mcq.comp = mlx4_ib_cq_comp;
229 cq->mcq.event = mlx4_ib_cq_event;
230
231 if (context)
232 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof (__u32))) {
233 err = -EFAULT;
234 goto err_dbmap;
235 }
236
237 return &cq->ibcq;
238
239 err_dbmap:
240 if (context)
241 mlx4_ib_db_unmap_user(to_mucontext(context), &cq->db);
242
243 err_mtt:
244 mlx4_mtt_cleanup(dev->dev, &cq->buf.mtt);
245
246 if (context)
247 ib_umem_release(cq->umem);
248 else
249 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
250
251 err_db:
252 if (!context)
253 mlx4_db_free(dev->dev, &cq->db);
254
255 err_cq:
256 kfree(cq);
257
258 return ERR_PTR(err);
259 }
260
261 static int mlx4_alloc_resize_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq,
262 int entries)
263 {
264 int err;
265
266 if (cq->resize_buf)
267 return -EBUSY;
268
269 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
270 if (!cq->resize_buf)
271 return -ENOMEM;
272
273 err = mlx4_ib_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
274 if (err) {
275 kfree(cq->resize_buf);
276 cq->resize_buf = NULL;
277 return err;
278 }
279
280 cq->resize_buf->cqe = entries - 1;
281
282 return 0;
283 }
284
285 static int mlx4_alloc_resize_umem(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq,
286 int entries, struct ib_udata *udata)
287 {
288 struct mlx4_ib_resize_cq ucmd;
289 int err;
290
291 if (cq->resize_umem)
292 return -EBUSY;
293
294 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
295 return -EFAULT;
296
297 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
298 if (!cq->resize_buf)
299 return -ENOMEM;
300
301 err = mlx4_ib_get_cq_umem(dev, cq->umem->context, &cq->resize_buf->buf,
302 &cq->resize_umem, ucmd.buf_addr, entries);
303 if (err) {
304 kfree(cq->resize_buf);
305 cq->resize_buf = NULL;
306 return err;
307 }
308
309 cq->resize_buf->cqe = entries - 1;
310
311 return 0;
312 }
313
314 static int mlx4_ib_get_outstanding_cqes(struct mlx4_ib_cq *cq)
315 {
316 u32 i;
317
318 i = cq->mcq.cons_index;
319 while (get_sw_cqe(cq, i & cq->ibcq.cqe))
320 ++i;
321
322 return i - cq->mcq.cons_index;
323 }
324
325 static void mlx4_ib_cq_resize_copy_cqes(struct mlx4_ib_cq *cq)
326 {
327 struct mlx4_cqe *cqe;
328 int i;
329
330 i = cq->mcq.cons_index;
331 cqe = get_cqe(cq, i & cq->ibcq.cqe);
332 while ((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) != MLX4_CQE_OPCODE_RESIZE) {
333 memcpy(get_cqe_from_buf(&cq->resize_buf->buf,
334 (i + 1) & cq->resize_buf->cqe),
335 get_cqe(cq, i & cq->ibcq.cqe), sizeof(struct mlx4_cqe));
336 cqe = get_cqe(cq, ++i & cq->ibcq.cqe);
337 }
338 ++cq->mcq.cons_index;
339 }
340
341 int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
342 {
343 struct mlx4_ib_dev *dev = to_mdev(ibcq->device);
344 struct mlx4_ib_cq *cq = to_mcq(ibcq);
345 int outst_cqe;
346 int err;
347
348 mutex_lock(&cq->resize_mutex);
349
350 if (entries < 1 || entries > dev->dev->caps.max_cqes) {
351 err = -EINVAL;
352 goto out;
353 }
354
355 entries = roundup_pow_of_two(entries + 1);
356 if (entries == ibcq->cqe + 1) {
357 err = 0;
358 goto out;
359 }
360
361 if (ibcq->uobject) {
362 err = mlx4_alloc_resize_umem(dev, cq, entries, udata);
363 if (err)
364 goto out;
365 } else {
366 /* Can't be smaller then the number of outstanding CQEs */
367 outst_cqe = mlx4_ib_get_outstanding_cqes(cq);
368 if (entries < outst_cqe + 1) {
369 err = 0;
370 goto out;
371 }
372
373 err = mlx4_alloc_resize_buf(dev, cq, entries);
374 if (err)
375 goto out;
376 }
377
378 err = mlx4_cq_resize(dev->dev, &cq->mcq, entries, &cq->resize_buf->buf.mtt);
379 if (err)
380 goto err_buf;
381
382 if (ibcq->uobject) {
383 cq->buf = cq->resize_buf->buf;
384 cq->ibcq.cqe = cq->resize_buf->cqe;
385 ib_umem_release(cq->umem);
386 cq->umem = cq->resize_umem;
387
388 kfree(cq->resize_buf);
389 cq->resize_buf = NULL;
390 cq->resize_umem = NULL;
391 } else {
392 spin_lock_irq(&cq->lock);
393 if (cq->resize_buf) {
394 mlx4_ib_cq_resize_copy_cqes(cq);
395 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
396 cq->buf = cq->resize_buf->buf;
397 cq->ibcq.cqe = cq->resize_buf->cqe;
398
399 kfree(cq->resize_buf);
400 cq->resize_buf = NULL;
401 }
402 spin_unlock_irq(&cq->lock);
403 }
404
405 goto out;
406
407 err_buf:
408 if (!ibcq->uobject)
409 mlx4_ib_free_cq_buf(dev, &cq->resize_buf->buf,
410 cq->resize_buf->cqe);
411
412 kfree(cq->resize_buf);
413 cq->resize_buf = NULL;
414
415 if (cq->resize_umem) {
416 ib_umem_release(cq->resize_umem);
417 cq->resize_umem = NULL;
418 }
419
420 out:
421 mutex_unlock(&cq->resize_mutex);
422 return err;
423 }
424
425 int mlx4_ib_destroy_cq(struct ib_cq *cq)
426 {
427 struct mlx4_ib_dev *dev = to_mdev(cq->device);
428 struct mlx4_ib_cq *mcq = to_mcq(cq);
429
430 mlx4_cq_free(dev->dev, &mcq->mcq);
431 mlx4_mtt_cleanup(dev->dev, &mcq->buf.mtt);
432
433 if (cq->uobject) {
434 mlx4_ib_db_unmap_user(to_mucontext(cq->uobject->context), &mcq->db);
435 ib_umem_release(mcq->umem);
436 } else {
437 mlx4_ib_free_cq_buf(dev, &mcq->buf, cq->cqe);
438 mlx4_db_free(dev->dev, &mcq->db);
439 }
440
441 kfree(mcq);
442
443 return 0;
444 }
445
446 static void dump_cqe(void *cqe)
447 {
448 __be32 *buf = cqe;
449
450 printk(KERN_DEBUG "CQE contents %08x %08x %08x %08x %08x %08x %08x %08x\n",
451 be32_to_cpu(buf[0]), be32_to_cpu(buf[1]), be32_to_cpu(buf[2]),
452 be32_to_cpu(buf[3]), be32_to_cpu(buf[4]), be32_to_cpu(buf[5]),
453 be32_to_cpu(buf[6]), be32_to_cpu(buf[7]));
454 }
455
456 static void mlx4_ib_handle_error_cqe(struct mlx4_err_cqe *cqe,
457 struct ib_wc *wc)
458 {
459 if (cqe->syndrome == MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR) {
460 printk(KERN_DEBUG "local QP operation err "
461 "(QPN %06x, WQE index %x, vendor syndrome %02x, "
462 "opcode = %02x)\n",
463 be32_to_cpu(cqe->my_qpn), be16_to_cpu(cqe->wqe_index),
464 cqe->vendor_err_syndrome,
465 cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
466 dump_cqe(cqe);
467 }
468
469 switch (cqe->syndrome) {
470 case MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR:
471 wc->status = IB_WC_LOC_LEN_ERR;
472 break;
473 case MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR:
474 wc->status = IB_WC_LOC_QP_OP_ERR;
475 break;
476 case MLX4_CQE_SYNDROME_LOCAL_PROT_ERR:
477 wc->status = IB_WC_LOC_PROT_ERR;
478 break;
479 case MLX4_CQE_SYNDROME_WR_FLUSH_ERR:
480 wc->status = IB_WC_WR_FLUSH_ERR;
481 break;
482 case MLX4_CQE_SYNDROME_MW_BIND_ERR:
483 wc->status = IB_WC_MW_BIND_ERR;
484 break;
485 case MLX4_CQE_SYNDROME_BAD_RESP_ERR:
486 wc->status = IB_WC_BAD_RESP_ERR;
487 break;
488 case MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR:
489 wc->status = IB_WC_LOC_ACCESS_ERR;
490 break;
491 case MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR:
492 wc->status = IB_WC_REM_INV_REQ_ERR;
493 break;
494 case MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR:
495 wc->status = IB_WC_REM_ACCESS_ERR;
496 break;
497 case MLX4_CQE_SYNDROME_REMOTE_OP_ERR:
498 wc->status = IB_WC_REM_OP_ERR;
499 break;
500 case MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR:
501 wc->status = IB_WC_RETRY_EXC_ERR;
502 break;
503 case MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR:
504 wc->status = IB_WC_RNR_RETRY_EXC_ERR;
505 break;
506 case MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR:
507 wc->status = IB_WC_REM_ABORT_ERR;
508 break;
509 default:
510 wc->status = IB_WC_GENERAL_ERR;
511 break;
512 }
513
514 wc->vendor_err = cqe->vendor_err_syndrome;
515 }
516
517 static int mlx4_ib_ipoib_csum_ok(__be32 status, __be16 checksum)
518 {
519 return ((status & cpu_to_be32(MLX4_CQE_IPOIB_STATUS_IPV4 |
520 MLX4_CQE_IPOIB_STATUS_IPV4F |
521 MLX4_CQE_IPOIB_STATUS_IPV4OPT |
522 MLX4_CQE_IPOIB_STATUS_IPV6 |
523 MLX4_CQE_IPOIB_STATUS_IPOK)) ==
524 cpu_to_be32(MLX4_CQE_IPOIB_STATUS_IPV4 |
525 MLX4_CQE_IPOIB_STATUS_IPOK)) &&
526 (status & cpu_to_be32(MLX4_CQE_IPOIB_STATUS_UDP |
527 MLX4_CQE_IPOIB_STATUS_TCP)) &&
528 checksum == cpu_to_be16(0xffff);
529 }
530
531 static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
532 struct mlx4_ib_qp **cur_qp,
533 struct ib_wc *wc)
534 {
535 struct mlx4_cqe *cqe;
536 struct mlx4_qp *mqp;
537 struct mlx4_ib_wq *wq;
538 struct mlx4_ib_srq *srq;
539 int is_send;
540 int is_error;
541 u32 g_mlpath_rqpn;
542 u16 wqe_ctr;
543
544 repoll:
545 cqe = next_cqe_sw(cq);
546 if (!cqe)
547 return -EAGAIN;
548
549 ++cq->mcq.cons_index;
550
551 /*
552 * Make sure we read CQ entry contents after we've checked the
553 * ownership bit.
554 */
555 rmb();
556
557 is_send = cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK;
558 is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
559 MLX4_CQE_OPCODE_ERROR;
560
561 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_OPCODE_NOP &&
562 is_send)) {
563 printk(KERN_WARNING "Completion for NOP opcode detected!\n");
564 return -EINVAL;
565 }
566
567 /* Resize CQ in progress */
568 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_CQE_OPCODE_RESIZE)) {
569 if (cq->resize_buf) {
570 struct mlx4_ib_dev *dev = to_mdev(cq->ibcq.device);
571
572 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
573 cq->buf = cq->resize_buf->buf;
574 cq->ibcq.cqe = cq->resize_buf->cqe;
575
576 kfree(cq->resize_buf);
577 cq->resize_buf = NULL;
578 }
579
580 goto repoll;
581 }
582
583 if (!*cur_qp ||
584 (be32_to_cpu(cqe->my_qpn) & 0xffffff) != (*cur_qp)->mqp.qpn) {
585 /*
586 * We do not have to take the QP table lock here,
587 * because CQs will be locked while QPs are removed
588 * from the table.
589 */
590 mqp = __mlx4_qp_lookup(to_mdev(cq->ibcq.device)->dev,
591 be32_to_cpu(cqe->my_qpn));
592 if (unlikely(!mqp)) {
593 printk(KERN_WARNING "CQ %06x with entry for unknown QPN %06x\n",
594 cq->mcq.cqn, be32_to_cpu(cqe->my_qpn) & 0xffffff);
595 return -EINVAL;
596 }
597
598 *cur_qp = to_mibqp(mqp);
599 }
600
601 wc->qp = &(*cur_qp)->ibqp;
602
603 if (is_send) {
604 wq = &(*cur_qp)->sq;
605 if (!(*cur_qp)->sq_signal_bits) {
606 wqe_ctr = be16_to_cpu(cqe->wqe_index);
607 wq->tail += (u16) (wqe_ctr - (u16) wq->tail);
608 }
609 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
610 ++wq->tail;
611 } else if ((*cur_qp)->ibqp.srq) {
612 srq = to_msrq((*cur_qp)->ibqp.srq);
613 wqe_ctr = be16_to_cpu(cqe->wqe_index);
614 wc->wr_id = srq->wrid[wqe_ctr];
615 mlx4_ib_free_srq_wqe(srq, wqe_ctr);
616 } else {
617 wq = &(*cur_qp)->rq;
618 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
619 ++wq->tail;
620 }
621
622 if (unlikely(is_error)) {
623 mlx4_ib_handle_error_cqe((struct mlx4_err_cqe *) cqe, wc);
624 return 0;
625 }
626
627 wc->status = IB_WC_SUCCESS;
628
629 if (is_send) {
630 wc->wc_flags = 0;
631 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
632 case MLX4_OPCODE_RDMA_WRITE_IMM:
633 wc->wc_flags |= IB_WC_WITH_IMM;
634 case MLX4_OPCODE_RDMA_WRITE:
635 wc->opcode = IB_WC_RDMA_WRITE;
636 break;
637 case MLX4_OPCODE_SEND_IMM:
638 wc->wc_flags |= IB_WC_WITH_IMM;
639 case MLX4_OPCODE_SEND:
640 wc->opcode = IB_WC_SEND;
641 break;
642 case MLX4_OPCODE_RDMA_READ:
643 wc->opcode = IB_WC_RDMA_READ;
644 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
645 break;
646 case MLX4_OPCODE_ATOMIC_CS:
647 wc->opcode = IB_WC_COMP_SWAP;
648 wc->byte_len = 8;
649 break;
650 case MLX4_OPCODE_ATOMIC_FA:
651 wc->opcode = IB_WC_FETCH_ADD;
652 wc->byte_len = 8;
653 break;
654 case MLX4_OPCODE_BIND_MW:
655 wc->opcode = IB_WC_BIND_MW;
656 break;
657 case MLX4_OPCODE_LSO:
658 wc->opcode = IB_WC_LSO;
659 break;
660 }
661 } else {
662 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
663
664 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
665 case MLX4_RECV_OPCODE_RDMA_WRITE_IMM:
666 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
667 wc->wc_flags = IB_WC_WITH_IMM;
668 wc->imm_data = cqe->immed_rss_invalid;
669 break;
670 case MLX4_RECV_OPCODE_SEND:
671 wc->opcode = IB_WC_RECV;
672 wc->wc_flags = 0;
673 break;
674 case MLX4_RECV_OPCODE_SEND_IMM:
675 wc->opcode = IB_WC_RECV;
676 wc->wc_flags = IB_WC_WITH_IMM;
677 wc->imm_data = cqe->immed_rss_invalid;
678 break;
679 }
680
681 wc->slid = be16_to_cpu(cqe->rlid);
682 wc->sl = cqe->sl >> 4;
683 g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn);
684 wc->src_qp = g_mlpath_rqpn & 0xffffff;
685 wc->dlid_path_bits = (g_mlpath_rqpn >> 24) & 0x7f;
686 wc->wc_flags |= g_mlpath_rqpn & 0x80000000 ? IB_WC_GRH : 0;
687 wc->pkey_index = be32_to_cpu(cqe->immed_rss_invalid) & 0x7f;
688 wc->csum_ok = mlx4_ib_ipoib_csum_ok(cqe->ipoib_status,
689 cqe->checksum);
690 }
691
692 return 0;
693 }
694
695 int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
696 {
697 struct mlx4_ib_cq *cq = to_mcq(ibcq);
698 struct mlx4_ib_qp *cur_qp = NULL;
699 unsigned long flags;
700 int npolled;
701 int err = 0;
702
703 spin_lock_irqsave(&cq->lock, flags);
704
705 for (npolled = 0; npolled < num_entries; ++npolled) {
706 err = mlx4_ib_poll_one(cq, &cur_qp, wc + npolled);
707 if (err)
708 break;
709 }
710
711 if (npolled)
712 mlx4_cq_set_ci(&cq->mcq);
713
714 spin_unlock_irqrestore(&cq->lock, flags);
715
716 if (err == 0 || err == -EAGAIN)
717 return npolled;
718 else
719 return err;
720 }
721
722 int mlx4_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
723 {
724 mlx4_cq_arm(&to_mcq(ibcq)->mcq,
725 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
726 MLX4_CQ_DB_REQ_NOT_SOL : MLX4_CQ_DB_REQ_NOT,
727 to_mdev(ibcq->device)->uar_map,
728 MLX4_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->uar_lock));
729
730 return 0;
731 }
732
733 void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
734 {
735 u32 prod_index;
736 int nfreed = 0;
737 struct mlx4_cqe *cqe, *dest;
738 u8 owner_bit;
739
740 /*
741 * First we need to find the current producer index, so we
742 * know where to start cleaning from. It doesn't matter if HW
743 * adds new entries after this loop -- the QP we're worried
744 * about is already in RESET, so the new entries won't come
745 * from our QP and therefore don't need to be checked.
746 */
747 for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); ++prod_index)
748 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe)
749 break;
750
751 /*
752 * Now sweep backwards through the CQ, removing CQ entries
753 * that match our QP by copying older entries on top of them.
754 */
755 while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) {
756 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe);
757 if ((be32_to_cpu(cqe->my_qpn) & 0xffffff) == qpn) {
758 if (srq && !(cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK))
759 mlx4_ib_free_srq_wqe(srq, be16_to_cpu(cqe->wqe_index));
760 ++nfreed;
761 } else if (nfreed) {
762 dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe);
763 owner_bit = dest->owner_sr_opcode & MLX4_CQE_OWNER_MASK;
764 memcpy(dest, cqe, sizeof *cqe);
765 dest->owner_sr_opcode = owner_bit |
766 (dest->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
767 }
768 }
769
770 if (nfreed) {
771 cq->mcq.cons_index += nfreed;
772 /*
773 * Make sure update of buffer contents is done before
774 * updating consumer index.
775 */
776 wmb();
777 mlx4_cq_set_ci(&cq->mcq);
778 }
779 }
780
781 void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
782 {
783 spin_lock_irq(&cq->lock);
784 __mlx4_ib_cq_clean(cq, qpn, srq);
785 spin_unlock_irq(&cq->lock);
786 }
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