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fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / infiniband / hw / mlx4 / cq.c
blobcc40f08ca8f1d353faafde91015ab13c247bad4b
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/mlx4/cq.h>
35 #include <linux/mlx4/qp.h>
36 #include <linux/mlx4/srq.h>
37 #include <linux/slab.h>
38
39 #include "mlx4_ib.h"
40 #include "user.h"
41
42 static void mlx4_ib_cq_comp(struct mlx4_cq *cq)
43 {
44 struct ib_cq *ibcq = &to_mibcq(cq)->ibcq;
45 ibcq->comp_handler(ibcq, ibcq->cq_context);
46 }
47
48 static void mlx4_ib_cq_event(struct mlx4_cq *cq, enum mlx4_event type)
49 {
50 struct ib_event event;
51 struct ib_cq *ibcq;
52
53 if (type != MLX4_EVENT_TYPE_CQ_ERROR) {
54 pr_warn("Unexpected event type %d "
55 "on CQ %06x\n", type, cq->cqn);
56 return;
57 }
58
59 ibcq = &to_mibcq(cq)->ibcq;
60 if (ibcq->event_handler) {
61 event.device = ibcq->device;
62 event.event = IB_EVENT_CQ_ERR;
63 event.element.cq = ibcq;
64 ibcq->event_handler(&event, ibcq->cq_context);
65 }
66 }
67
68 static void *get_cqe_from_buf(struct mlx4_ib_cq_buf *buf, int n)
69 {
70 return mlx4_buf_offset(&buf->buf, n * buf->entry_size);
71 }
72
73 static void *get_cqe(struct mlx4_ib_cq *cq, int n)
74 {
75 return get_cqe_from_buf(&cq->buf, n);
76 }
77
78 static void *get_sw_cqe(struct mlx4_ib_cq *cq, int n)
79 {
80 struct mlx4_cqe *cqe = get_cqe(cq, n & cq->ibcq.cqe);
81 struct mlx4_cqe *tcqe = ((cq->buf.entry_size == 64) ? (cqe + 1) : cqe);
82
83 return (!!(tcqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK) ^
84 !!(n & (cq->ibcq.cqe + 1))) ? NULL : cqe;
85 }
86
87 static struct mlx4_cqe *next_cqe_sw(struct mlx4_ib_cq *cq)
88 {
89 return get_sw_cqe(cq, cq->mcq.cons_index);
90 }
91
92 int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
93 {
94 struct mlx4_ib_cq *mcq = to_mcq(cq);
95 struct mlx4_ib_dev *dev = to_mdev(cq->device);
96
97 return mlx4_cq_modify(dev->dev, &mcq->mcq, cq_count, cq_period);
98 }
99
100 static int mlx4_ib_alloc_cq_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq_buf *buf, int nent)
101 {
102 int err;
103
104 err = mlx4_buf_alloc(dev->dev, nent * dev->dev->caps.cqe_size,
105 PAGE_SIZE * 2, &buf->buf);
106
107 if (err)
108 goto out;
109
110 buf->entry_size = dev->dev->caps.cqe_size;
111 err = mlx4_mtt_init(dev->dev, buf->buf.npages, buf->buf.page_shift,
112 &buf->mtt);
113 if (err)
114 goto err_buf;
115
116 err = mlx4_buf_write_mtt(dev->dev, &buf->mtt, &buf->buf);
117 if (err)
118 goto err_mtt;
119
120 return 0;
121
122 err_mtt:
123 mlx4_mtt_cleanup(dev->dev, &buf->mtt);
124
125 err_buf:
126 mlx4_buf_free(dev->dev, nent * buf->entry_size, &buf->buf);
127
128 out:
129 return err;
130 }
131
132 static void mlx4_ib_free_cq_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq_buf *buf, int cqe)
133 {
134 mlx4_buf_free(dev->dev, (cqe + 1) * buf->entry_size, &buf->buf);
135 }
136
137 static int mlx4_ib_get_cq_umem(struct mlx4_ib_dev *dev, struct ib_ucontext *context,
138 struct mlx4_ib_cq_buf *buf, struct ib_umem **umem,
139 u64 buf_addr, int cqe)
140 {
141 int err;
142 int cqe_size = dev->dev->caps.cqe_size;
143
144 *umem = ib_umem_get(context, buf_addr, cqe * cqe_size,
145 IB_ACCESS_LOCAL_WRITE, 1);
146 if (IS_ERR(*umem))
147 return PTR_ERR(*umem);
148
149 err = mlx4_mtt_init(dev->dev, ib_umem_page_count(*umem),
150 ilog2((*umem)->page_size), &buf->mtt);
151 if (err)
152 goto err_buf;
153
154 err = mlx4_ib_umem_write_mtt(dev, &buf->mtt, *umem);
155 if (err)
156 goto err_mtt;
157
158 return 0;
159
160 err_mtt:
161 mlx4_mtt_cleanup(dev->dev, &buf->mtt);
162
163 err_buf:
164 ib_umem_release(*umem);
165
166 return err;
167 }
168
169 struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector,
170 struct ib_ucontext *context,
171 struct ib_udata *udata)
172 {
173 struct mlx4_ib_dev *dev = to_mdev(ibdev);
174 struct mlx4_ib_cq *cq;
175 struct mlx4_uar *uar;
176 int err;
177
178 if (entries < 1 || entries > dev->dev->caps.max_cqes)
179 return ERR_PTR(-EINVAL);
180
181 cq = kmalloc(sizeof *cq, GFP_KERNEL);
182 if (!cq)
183 return ERR_PTR(-ENOMEM);
184
185 entries = roundup_pow_of_two(entries + 1);
186 cq->ibcq.cqe = entries - 1;
187 mutex_init(&cq->resize_mutex);
188 spin_lock_init(&cq->lock);
189 cq->resize_buf = NULL;
190 cq->resize_umem = NULL;
191
192 if (context) {
193 struct mlx4_ib_create_cq ucmd;
194
195 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
196 err = -EFAULT;
197 goto err_cq;
198 }
199
200 err = mlx4_ib_get_cq_umem(dev, context, &cq->buf, &cq->umem,
201 ucmd.buf_addr, entries);
202 if (err)
203 goto err_cq;
204
205 err = mlx4_ib_db_map_user(to_mucontext(context), ucmd.db_addr,
206 &cq->db);
207 if (err)
208 goto err_mtt;
209
210 uar = &to_mucontext(context)->uar;
211 } else {
212 err = mlx4_db_alloc(dev->dev, &cq->db, 1);
213 if (err)
214 goto err_cq;
215
216 cq->mcq.set_ci_db = cq->db.db;
217 cq->mcq.arm_db = cq->db.db + 1;
218 *cq->mcq.set_ci_db = 0;
219 *cq->mcq.arm_db = 0;
220
221 err = mlx4_ib_alloc_cq_buf(dev, &cq->buf, entries);
222 if (err)
223 goto err_db;
224
225 uar = &dev->priv_uar;
226 }
227
228 if (dev->eq_table)
229 vector = dev->eq_table[vector % ibdev->num_comp_vectors];
230
231 err = mlx4_cq_alloc(dev->dev, entries, &cq->buf.mtt, uar,
232 cq->db.dma, &cq->mcq, vector, 0, 0);
233 if (err)
234 goto err_dbmap;
235
236 cq->mcq.comp = mlx4_ib_cq_comp;
237 cq->mcq.event = mlx4_ib_cq_event;
238
239 if (context)
240 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof (__u32))) {
241 err = -EFAULT;
242 goto err_dbmap;
243 }
244
245 return &cq->ibcq;
246
247 err_dbmap:
248 if (context)
249 mlx4_ib_db_unmap_user(to_mucontext(context), &cq->db);
250
251 err_mtt:
252 mlx4_mtt_cleanup(dev->dev, &cq->buf.mtt);
253
254 if (context)
255 ib_umem_release(cq->umem);
256 else
257 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
258
259 err_db:
260 if (!context)
261 mlx4_db_free(dev->dev, &cq->db);
262
263 err_cq:
264 kfree(cq);
265
266 return ERR_PTR(err);
267 }
268
269 static int mlx4_alloc_resize_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq,
270 int entries)
271 {
272 int err;
273
274 if (cq->resize_buf)
275 return -EBUSY;
276
277 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
278 if (!cq->resize_buf)
279 return -ENOMEM;
280
281 err = mlx4_ib_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
282 if (err) {
283 kfree(cq->resize_buf);
284 cq->resize_buf = NULL;
285 return err;
286 }
287
288 cq->resize_buf->cqe = entries - 1;
289
290 return 0;
291 }
292
293 static int mlx4_alloc_resize_umem(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq,
294 int entries, struct ib_udata *udata)
295 {
296 struct mlx4_ib_resize_cq ucmd;
297 int err;
298
299 if (cq->resize_umem)
300 return -EBUSY;
301
302 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
303 return -EFAULT;
304
305 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
306 if (!cq->resize_buf)
307 return -ENOMEM;
308
309 err = mlx4_ib_get_cq_umem(dev, cq->umem->context, &cq->resize_buf->buf,
310 &cq->resize_umem, ucmd.buf_addr, entries);
311 if (err) {
312 kfree(cq->resize_buf);
313 cq->resize_buf = NULL;
314 return err;
315 }
316
317 cq->resize_buf->cqe = entries - 1;
318
319 return 0;
320 }
321
322 static int mlx4_ib_get_outstanding_cqes(struct mlx4_ib_cq *cq)
323 {
324 u32 i;
325
326 i = cq->mcq.cons_index;
327 while (get_sw_cqe(cq, i))
328 ++i;
329
330 return i - cq->mcq.cons_index;
331 }
332
333 static void mlx4_ib_cq_resize_copy_cqes(struct mlx4_ib_cq *cq)
334 {
335 struct mlx4_cqe *cqe, *new_cqe;
336 int i;
337 int cqe_size = cq->buf.entry_size;
338 int cqe_inc = cqe_size == 64 ? 1 : 0;
339
340 i = cq->mcq.cons_index;
341 cqe = get_cqe(cq, i & cq->ibcq.cqe);
342 cqe += cqe_inc;
343
344 while ((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) != MLX4_CQE_OPCODE_RESIZE) {
345 new_cqe = get_cqe_from_buf(&cq->resize_buf->buf,
346 (i + 1) & cq->resize_buf->cqe);
347 memcpy(new_cqe, get_cqe(cq, i & cq->ibcq.cqe), cqe_size);
348 new_cqe += cqe_inc;
349
350 new_cqe->owner_sr_opcode = (cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK) |
351 (((i + 1) & (cq->resize_buf->cqe + 1)) ? MLX4_CQE_OWNER_MASK : 0);
352 cqe = get_cqe(cq, ++i & cq->ibcq.cqe);
353 cqe += cqe_inc;
354 }
355 ++cq->mcq.cons_index;
356 }
357
358 int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
359 {
360 struct mlx4_ib_dev *dev = to_mdev(ibcq->device);
361 struct mlx4_ib_cq *cq = to_mcq(ibcq);
362 struct mlx4_mtt mtt;
363 int outst_cqe;
364 int err;
365
366 mutex_lock(&cq->resize_mutex);
367
368 if (entries < 1) {
369 err = -EINVAL;
370 goto out;
371 }
372
373 entries = roundup_pow_of_two(entries + 1);
374 if (entries == ibcq->cqe + 1) {
375 err = 0;
376 goto out;
377 }
378
379 if (entries > dev->dev->caps.max_cqes) {
380 err = -EINVAL;
381 goto out;
382 }
383
384 if (ibcq->uobject) {
385 err = mlx4_alloc_resize_umem(dev, cq, entries, udata);
386 if (err)
387 goto out;
388 } else {
389 /* Can't be smaller than the number of outstanding CQEs */
390 outst_cqe = mlx4_ib_get_outstanding_cqes(cq);
391 if (entries < outst_cqe + 1) {
392 err = 0;
393 goto out;
394 }
395
396 err = mlx4_alloc_resize_buf(dev, cq, entries);
397 if (err)
398 goto out;
399 }
400
401 mtt = cq->buf.mtt;
402
403 err = mlx4_cq_resize(dev->dev, &cq->mcq, entries, &cq->resize_buf->buf.mtt);
404 if (err)
405 goto err_buf;
406
407 mlx4_mtt_cleanup(dev->dev, &mtt);
408 if (ibcq->uobject) {
409 cq->buf = cq->resize_buf->buf;
410 cq->ibcq.cqe = cq->resize_buf->cqe;
411 ib_umem_release(cq->umem);
412 cq->umem = cq->resize_umem;
413
414 kfree(cq->resize_buf);
415 cq->resize_buf = NULL;
416 cq->resize_umem = NULL;
417 } else {
418 struct mlx4_ib_cq_buf tmp_buf;
419 int tmp_cqe = 0;
420
421 spin_lock_irq(&cq->lock);
422 if (cq->resize_buf) {
423 mlx4_ib_cq_resize_copy_cqes(cq);
424 tmp_buf = cq->buf;
425 tmp_cqe = cq->ibcq.cqe;
426 cq->buf = cq->resize_buf->buf;
427 cq->ibcq.cqe = cq->resize_buf->cqe;
428
429 kfree(cq->resize_buf);
430 cq->resize_buf = NULL;
431 }
432 spin_unlock_irq(&cq->lock);
433
434 if (tmp_cqe)
435 mlx4_ib_free_cq_buf(dev, &tmp_buf, tmp_cqe);
436 }
437
438 goto out;
439
440 err_buf:
441 mlx4_mtt_cleanup(dev->dev, &cq->resize_buf->buf.mtt);
442 if (!ibcq->uobject)
443 mlx4_ib_free_cq_buf(dev, &cq->resize_buf->buf,
444 cq->resize_buf->cqe);
445
446 kfree(cq->resize_buf);
447 cq->resize_buf = NULL;
448
449 if (cq->resize_umem) {
450 ib_umem_release(cq->resize_umem);
451 cq->resize_umem = NULL;
452 }
453
454 out:
455 mutex_unlock(&cq->resize_mutex);
456
457 return err;
458 }
459
460 int mlx4_ib_destroy_cq(struct ib_cq *cq)
461 {
462 struct mlx4_ib_dev *dev = to_mdev(cq->device);
463 struct mlx4_ib_cq *mcq = to_mcq(cq);
464
465 mlx4_cq_free(dev->dev, &mcq->mcq);
466 mlx4_mtt_cleanup(dev->dev, &mcq->buf.mtt);
467
468 if (cq->uobject) {
469 mlx4_ib_db_unmap_user(to_mucontext(cq->uobject->context), &mcq->db);
470 ib_umem_release(mcq->umem);
471 } else {
472 mlx4_ib_free_cq_buf(dev, &mcq->buf, cq->cqe);
473 mlx4_db_free(dev->dev, &mcq->db);
474 }
475
476 kfree(mcq);
477
478 return 0;
479 }
480
481 static void dump_cqe(void *cqe)
482 {
483 __be32 *buf = cqe;
484
485 pr_debug("CQE contents %08x %08x %08x %08x %08x %08x %08x %08x\n",
486 be32_to_cpu(buf[0]), be32_to_cpu(buf[1]), be32_to_cpu(buf[2]),
487 be32_to_cpu(buf[3]), be32_to_cpu(buf[4]), be32_to_cpu(buf[5]),
488 be32_to_cpu(buf[6]), be32_to_cpu(buf[7]));
489 }
490
491 static void mlx4_ib_handle_error_cqe(struct mlx4_err_cqe *cqe,
492 struct ib_wc *wc)
493 {
494 if (cqe->syndrome == MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR) {
495 pr_debug("local QP operation err "
496 "(QPN %06x, WQE index %x, vendor syndrome %02x, "
497 "opcode = %02x)\n",
498 be32_to_cpu(cqe->my_qpn), be16_to_cpu(cqe->wqe_index),
499 cqe->vendor_err_syndrome,
500 cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
501 dump_cqe(cqe);
502 }
503
504 switch (cqe->syndrome) {
505 case MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR:
506 wc->status = IB_WC_LOC_LEN_ERR;
507 break;
508 case MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR:
509 wc->status = IB_WC_LOC_QP_OP_ERR;
510 break;
511 case MLX4_CQE_SYNDROME_LOCAL_PROT_ERR:
512 wc->status = IB_WC_LOC_PROT_ERR;
513 break;
514 case MLX4_CQE_SYNDROME_WR_FLUSH_ERR:
515 wc->status = IB_WC_WR_FLUSH_ERR;
516 break;
517 case MLX4_CQE_SYNDROME_MW_BIND_ERR:
518 wc->status = IB_WC_MW_BIND_ERR;
519 break;
520 case MLX4_CQE_SYNDROME_BAD_RESP_ERR:
521 wc->status = IB_WC_BAD_RESP_ERR;
522 break;
523 case MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR:
524 wc->status = IB_WC_LOC_ACCESS_ERR;
525 break;
526 case MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR:
527 wc->status = IB_WC_REM_INV_REQ_ERR;
528 break;
529 case MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR:
530 wc->status = IB_WC_REM_ACCESS_ERR;
531 break;
532 case MLX4_CQE_SYNDROME_REMOTE_OP_ERR:
533 wc->status = IB_WC_REM_OP_ERR;
534 break;
535 case MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR:
536 wc->status = IB_WC_RETRY_EXC_ERR;
537 break;
538 case MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR:
539 wc->status = IB_WC_RNR_RETRY_EXC_ERR;
540 break;
541 case MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR:
542 wc->status = IB_WC_REM_ABORT_ERR;
543 break;
544 default:
545 wc->status = IB_WC_GENERAL_ERR;
546 break;
547 }
548
549 wc->vendor_err = cqe->vendor_err_syndrome;
550 }
551
552 static int mlx4_ib_ipoib_csum_ok(__be16 status, __be16 checksum)
553 {
554 return ((status & cpu_to_be16(MLX4_CQE_STATUS_IPV4 |
555 MLX4_CQE_STATUS_IPV4F |
556 MLX4_CQE_STATUS_IPV4OPT |
557 MLX4_CQE_STATUS_IPV6 |
558 MLX4_CQE_STATUS_IPOK)) ==
559 cpu_to_be16(MLX4_CQE_STATUS_IPV4 |
560 MLX4_CQE_STATUS_IPOK)) &&
561 (status & cpu_to_be16(MLX4_CQE_STATUS_UDP |
562 MLX4_CQE_STATUS_TCP)) &&
563 checksum == cpu_to_be16(0xffff);
564 }
565
566 static int use_tunnel_data(struct mlx4_ib_qp *qp, struct mlx4_ib_cq *cq, struct ib_wc *wc,
567 unsigned tail, struct mlx4_cqe *cqe)
568 {
569 struct mlx4_ib_proxy_sqp_hdr *hdr;
570
571 ib_dma_sync_single_for_cpu(qp->ibqp.device,
572 qp->sqp_proxy_rcv[tail].map,
573 sizeof (struct mlx4_ib_proxy_sqp_hdr),
574 DMA_FROM_DEVICE);
575 hdr = (struct mlx4_ib_proxy_sqp_hdr *) (qp->sqp_proxy_rcv[tail].addr);
576 wc->pkey_index = be16_to_cpu(hdr->tun.pkey_index);
577 wc->slid = be16_to_cpu(hdr->tun.slid_mac_47_32);
578 wc->sl = (u8) (be16_to_cpu(hdr->tun.sl_vid) >> 12);
579 wc->src_qp = be32_to_cpu(hdr->tun.flags_src_qp) & 0xFFFFFF;
580 wc->wc_flags |= (hdr->tun.g_ml_path & 0x80) ? (IB_WC_GRH) : 0;
581 wc->dlid_path_bits = 0;
582
583 return 0;
584 }
585
586 static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
587 struct mlx4_ib_qp **cur_qp,
588 struct ib_wc *wc)
589 {
590 struct mlx4_cqe *cqe;
591 struct mlx4_qp *mqp;
592 struct mlx4_ib_wq *wq;
593 struct mlx4_ib_srq *srq;
594 struct mlx4_srq *msrq = NULL;
595 int is_send;
596 int is_error;
597 u32 g_mlpath_rqpn;
598 u16 wqe_ctr;
599 unsigned tail = 0;
600
601 repoll:
602 cqe = next_cqe_sw(cq);
603 if (!cqe)
604 return -EAGAIN;
605
606 if (cq->buf.entry_size == 64)
607 cqe++;
608
609 ++cq->mcq.cons_index;
610
611 /*
612 * Make sure we read CQ entry contents after we've checked the
613 * ownership bit.
614 */
615 rmb();
616
617 is_send = cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK;
618 is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
619 MLX4_CQE_OPCODE_ERROR;
620
621 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_OPCODE_NOP &&
622 is_send)) {
623 pr_warn("Completion for NOP opcode detected!\n");
624 return -EINVAL;
625 }
626
627 /* Resize CQ in progress */
628 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_CQE_OPCODE_RESIZE)) {
629 if (cq->resize_buf) {
630 struct mlx4_ib_dev *dev = to_mdev(cq->ibcq.device);
631
632 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
633 cq->buf = cq->resize_buf->buf;
634 cq->ibcq.cqe = cq->resize_buf->cqe;
635
636 kfree(cq->resize_buf);
637 cq->resize_buf = NULL;
638 }
639
640 goto repoll;
641 }
642
643 if (!*cur_qp ||
644 (be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK) != (*cur_qp)->mqp.qpn) {
645 /*
646 * We do not have to take the QP table lock here,
647 * because CQs will be locked while QPs are removed
648 * from the table.
649 */
650 mqp = __mlx4_qp_lookup(to_mdev(cq->ibcq.device)->dev,
651 be32_to_cpu(cqe->vlan_my_qpn));
652 if (unlikely(!mqp)) {
653 pr_warn("CQ %06x with entry for unknown QPN %06x\n",
654 cq->mcq.cqn, be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK);
655 return -EINVAL;
656 }
657
658 *cur_qp = to_mibqp(mqp);
659 }
660
661 wc->qp = &(*cur_qp)->ibqp;
662
663 if (wc->qp->qp_type == IB_QPT_XRC_TGT) {
664 u32 srq_num;
665 g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn);
666 srq_num = g_mlpath_rqpn & 0xffffff;
667 /* SRQ is also in the radix tree */
668 msrq = mlx4_srq_lookup(to_mdev(cq->ibcq.device)->dev,
669 srq_num);
670 if (unlikely(!msrq)) {
671 pr_warn("CQ %06x with entry for unknown SRQN %06x\n",
672 cq->mcq.cqn, srq_num);
673 return -EINVAL;
674 }
675 }
676
677 if (is_send) {
678 wq = &(*cur_qp)->sq;
679 if (!(*cur_qp)->sq_signal_bits) {
680 wqe_ctr = be16_to_cpu(cqe->wqe_index);
681 wq->tail += (u16) (wqe_ctr - (u16) wq->tail);
682 }
683 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
684 ++wq->tail;
685 } else if ((*cur_qp)->ibqp.srq) {
686 srq = to_msrq((*cur_qp)->ibqp.srq);
687 wqe_ctr = be16_to_cpu(cqe->wqe_index);
688 wc->wr_id = srq->wrid[wqe_ctr];
689 mlx4_ib_free_srq_wqe(srq, wqe_ctr);
690 } else if (msrq) {
691 srq = to_mibsrq(msrq);
692 wqe_ctr = be16_to_cpu(cqe->wqe_index);
693 wc->wr_id = srq->wrid[wqe_ctr];
694 mlx4_ib_free_srq_wqe(srq, wqe_ctr);
695 } else {
696 wq = &(*cur_qp)->rq;
697 tail = wq->tail & (wq->wqe_cnt - 1);
698 wc->wr_id = wq->wrid[tail];
699 ++wq->tail;
700 }
701
702 if (unlikely(is_error)) {
703 mlx4_ib_handle_error_cqe((struct mlx4_err_cqe *) cqe, wc);
704 return 0;
705 }
706
707 wc->status = IB_WC_SUCCESS;
708
709 if (is_send) {
710 wc->wc_flags = 0;
711 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
712 case MLX4_OPCODE_RDMA_WRITE_IMM:
713 wc->wc_flags |= IB_WC_WITH_IMM;
714 case MLX4_OPCODE_RDMA_WRITE:
715 wc->opcode = IB_WC_RDMA_WRITE;
716 break;
717 case MLX4_OPCODE_SEND_IMM:
718 wc->wc_flags |= IB_WC_WITH_IMM;
719 case MLX4_OPCODE_SEND:
720 case MLX4_OPCODE_SEND_INVAL:
721 wc->opcode = IB_WC_SEND;
722 break;
723 case MLX4_OPCODE_RDMA_READ:
724 wc->opcode = IB_WC_RDMA_READ;
725 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
726 break;
727 case MLX4_OPCODE_ATOMIC_CS:
728 wc->opcode = IB_WC_COMP_SWAP;
729 wc->byte_len = 8;
730 break;
731 case MLX4_OPCODE_ATOMIC_FA:
732 wc->opcode = IB_WC_FETCH_ADD;
733 wc->byte_len = 8;
734 break;
735 case MLX4_OPCODE_MASKED_ATOMIC_CS:
736 wc->opcode = IB_WC_MASKED_COMP_SWAP;
737 wc->byte_len = 8;
738 break;
739 case MLX4_OPCODE_MASKED_ATOMIC_FA:
740 wc->opcode = IB_WC_MASKED_FETCH_ADD;
741 wc->byte_len = 8;
742 break;
743 case MLX4_OPCODE_BIND_MW:
744 wc->opcode = IB_WC_BIND_MW;
745 break;
746 case MLX4_OPCODE_LSO:
747 wc->opcode = IB_WC_LSO;
748 break;
749 case MLX4_OPCODE_FMR:
750 wc->opcode = IB_WC_FAST_REG_MR;
751 break;
752 case MLX4_OPCODE_LOCAL_INVAL:
753 wc->opcode = IB_WC_LOCAL_INV;
754 break;
755 }
756 } else {
757 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
758
759 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
760 case MLX4_RECV_OPCODE_RDMA_WRITE_IMM:
761 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
762 wc->wc_flags = IB_WC_WITH_IMM;
763 wc->ex.imm_data = cqe->immed_rss_invalid;
764 break;
765 case MLX4_RECV_OPCODE_SEND_INVAL:
766 wc->opcode = IB_WC_RECV;
767 wc->wc_flags = IB_WC_WITH_INVALIDATE;
768 wc->ex.invalidate_rkey = be32_to_cpu(cqe->immed_rss_invalid);
769 break;
770 case MLX4_RECV_OPCODE_SEND:
771 wc->opcode = IB_WC_RECV;
772 wc->wc_flags = 0;
773 break;
774 case MLX4_RECV_OPCODE_SEND_IMM:
775 wc->opcode = IB_WC_RECV;
776 wc->wc_flags = IB_WC_WITH_IMM;
777 wc->ex.imm_data = cqe->immed_rss_invalid;
778 break;
779 }
780
781 if (mlx4_is_mfunc(to_mdev(cq->ibcq.device)->dev)) {
782 if ((*cur_qp)->mlx4_ib_qp_type &
783 (MLX4_IB_QPT_PROXY_SMI_OWNER |
784 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
785 return use_tunnel_data(*cur_qp, cq, wc, tail, cqe);
786 }
787
788 wc->slid = be16_to_cpu(cqe->rlid);
789 g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn);
790 wc->src_qp = g_mlpath_rqpn & 0xffffff;
791 wc->dlid_path_bits = (g_mlpath_rqpn >> 24) & 0x7f;
792 wc->wc_flags |= g_mlpath_rqpn & 0x80000000 ? IB_WC_GRH : 0;
793 wc->pkey_index = be32_to_cpu(cqe->immed_rss_invalid) & 0x7f;
794 wc->wc_flags |= mlx4_ib_ipoib_csum_ok(cqe->status,
795 cqe->checksum) ? IB_WC_IP_CSUM_OK : 0;
796 if (rdma_port_get_link_layer(wc->qp->device,
797 (*cur_qp)->port) == IB_LINK_LAYER_ETHERNET)
798 wc->sl = be16_to_cpu(cqe->sl_vid) >> 13;
799 else
800 wc->sl = be16_to_cpu(cqe->sl_vid) >> 12;
801 if (be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_VLAN_PRESENT_MASK) {
802 wc->vlan_id = be16_to_cpu(cqe->sl_vid) &
803 MLX4_CQE_VID_MASK;
804 } else {
805 wc->vlan_id = 0xffff;
806 }
807 wc->wc_flags |= IB_WC_WITH_VLAN;
808 memcpy(wc->smac, cqe->smac, ETH_ALEN);
809 wc->wc_flags |= IB_WC_WITH_SMAC;
810 }
811
812 return 0;
813 }
814
815 int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
816 {
817 struct mlx4_ib_cq *cq = to_mcq(ibcq);
818 struct mlx4_ib_qp *cur_qp = NULL;
819 unsigned long flags;
820 int npolled;
821 int err = 0;
822
823 spin_lock_irqsave(&cq->lock, flags);
824
825 for (npolled = 0; npolled < num_entries; ++npolled) {
826 err = mlx4_ib_poll_one(cq, &cur_qp, wc + npolled);
827 if (err)
828 break;
829 }
830
831 mlx4_cq_set_ci(&cq->mcq);
832
833 spin_unlock_irqrestore(&cq->lock, flags);
834
835 if (err == 0 || err == -EAGAIN)
836 return npolled;
837 else
838 return err;
839 }
840
841 int mlx4_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
842 {
843 mlx4_cq_arm(&to_mcq(ibcq)->mcq,
844 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
845 MLX4_CQ_DB_REQ_NOT_SOL : MLX4_CQ_DB_REQ_NOT,
846 to_mdev(ibcq->device)->uar_map,
847 MLX4_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->uar_lock));
848
849 return 0;
850 }
851
852 void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
853 {
854 u32 prod_index;
855 int nfreed = 0;
856 struct mlx4_cqe *cqe, *dest;
857 u8 owner_bit;
858 int cqe_inc = cq->buf.entry_size == 64 ? 1 : 0;
859
860 /*
861 * First we need to find the current producer index, so we
862 * know where to start cleaning from. It doesn't matter if HW
863 * adds new entries after this loop -- the QP we're worried
864 * about is already in RESET, so the new entries won't come
865 * from our QP and therefore don't need to be checked.
866 */
867 for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); ++prod_index)
868 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe)
869 break;
870
871 /*
872 * Now sweep backwards through the CQ, removing CQ entries
873 * that match our QP by copying older entries on top of them.
874 */
875 while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) {
876 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe);
877 cqe += cqe_inc;
878
879 if ((be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK) == qpn) {
880 if (srq && !(cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK))
881 mlx4_ib_free_srq_wqe(srq, be16_to_cpu(cqe->wqe_index));
882 ++nfreed;
883 } else if (nfreed) {
884 dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe);
885 dest += cqe_inc;
886
887 owner_bit = dest->owner_sr_opcode & MLX4_CQE_OWNER_MASK;
888 memcpy(dest, cqe, sizeof *cqe);
889 dest->owner_sr_opcode = owner_bit |
890 (dest->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
891 }
892 }
893
894 if (nfreed) {
895 cq->mcq.cons_index += nfreed;
896 /*
897 * Make sure update of buffer contents is done before
898 * updating consumer index.
899 */
900 wmb();
901 mlx4_cq_set_ci(&cq->mcq);
902 }
903 }
904
905 void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
906 {
907 spin_lock_irq(&cq->lock);
908 __mlx4_ib_cq_clean(cq, qpn, srq);
909 spin_unlock_irq(&cq->lock);
910 }
Linux with added FPC-III support