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IB/mlx4: Create mirror flows in port aggregation mode
[deliverable/linux.git] / drivers / infiniband / hw / mlx4 / cq.c
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, GFP_KERNEL);
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, GFP_KERNEL);
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, GFP_KERNEL);
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 if (context)
237 cq->mcq.tasklet_ctx.comp = mlx4_ib_cq_comp;
238 else
239 cq->mcq.comp = mlx4_ib_cq_comp;
240 cq->mcq.event = mlx4_ib_cq_event;
241
242 if (context)
243 if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof (__u32))) {
244 err = -EFAULT;
245 goto err_dbmap;
246 }
247
248 return &cq->ibcq;
249
250 err_dbmap:
251 if (context)
252 mlx4_ib_db_unmap_user(to_mucontext(context), &cq->db);
253
254 err_mtt:
255 mlx4_mtt_cleanup(dev->dev, &cq->buf.mtt);
256
257 if (context)
258 ib_umem_release(cq->umem);
259 else
260 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
261
262 err_db:
263 if (!context)
264 mlx4_db_free(dev->dev, &cq->db);
265
266 err_cq:
267 kfree(cq);
268
269 return ERR_PTR(err);
270 }
271
272 static int mlx4_alloc_resize_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq,
273 int entries)
274 {
275 int err;
276
277 if (cq->resize_buf)
278 return -EBUSY;
279
280 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
281 if (!cq->resize_buf)
282 return -ENOMEM;
283
284 err = mlx4_ib_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
285 if (err) {
286 kfree(cq->resize_buf);
287 cq->resize_buf = NULL;
288 return err;
289 }
290
291 cq->resize_buf->cqe = entries - 1;
292
293 return 0;
294 }
295
296 static int mlx4_alloc_resize_umem(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq,
297 int entries, struct ib_udata *udata)
298 {
299 struct mlx4_ib_resize_cq ucmd;
300 int err;
301
302 if (cq->resize_umem)
303 return -EBUSY;
304
305 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
306 return -EFAULT;
307
308 cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
309 if (!cq->resize_buf)
310 return -ENOMEM;
311
312 err = mlx4_ib_get_cq_umem(dev, cq->umem->context, &cq->resize_buf->buf,
313 &cq->resize_umem, ucmd.buf_addr, entries);
314 if (err) {
315 kfree(cq->resize_buf);
316 cq->resize_buf = NULL;
317 return err;
318 }
319
320 cq->resize_buf->cqe = entries - 1;
321
322 return 0;
323 }
324
325 static int mlx4_ib_get_outstanding_cqes(struct mlx4_ib_cq *cq)
326 {
327 u32 i;
328
329 i = cq->mcq.cons_index;
330 while (get_sw_cqe(cq, i))
331 ++i;
332
333 return i - cq->mcq.cons_index;
334 }
335
336 static void mlx4_ib_cq_resize_copy_cqes(struct mlx4_ib_cq *cq)
337 {
338 struct mlx4_cqe *cqe, *new_cqe;
339 int i;
340 int cqe_size = cq->buf.entry_size;
341 int cqe_inc = cqe_size == 64 ? 1 : 0;
342
343 i = cq->mcq.cons_index;
344 cqe = get_cqe(cq, i & cq->ibcq.cqe);
345 cqe += cqe_inc;
346
347 while ((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) != MLX4_CQE_OPCODE_RESIZE) {
348 new_cqe = get_cqe_from_buf(&cq->resize_buf->buf,
349 (i + 1) & cq->resize_buf->cqe);
350 memcpy(new_cqe, get_cqe(cq, i & cq->ibcq.cqe), cqe_size);
351 new_cqe += cqe_inc;
352
353 new_cqe->owner_sr_opcode = (cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK) |
354 (((i + 1) & (cq->resize_buf->cqe + 1)) ? MLX4_CQE_OWNER_MASK : 0);
355 cqe = get_cqe(cq, ++i & cq->ibcq.cqe);
356 cqe += cqe_inc;
357 }
358 ++cq->mcq.cons_index;
359 }
360
361 int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
362 {
363 struct mlx4_ib_dev *dev = to_mdev(ibcq->device);
364 struct mlx4_ib_cq *cq = to_mcq(ibcq);
365 struct mlx4_mtt mtt;
366 int outst_cqe;
367 int err;
368
369 mutex_lock(&cq->resize_mutex);
370
371 if (entries < 1) {
372 err = -EINVAL;
373 goto out;
374 }
375
376 entries = roundup_pow_of_two(entries + 1);
377 if (entries == ibcq->cqe + 1) {
378 err = 0;
379 goto out;
380 }
381
382 if (entries > dev->dev->caps.max_cqes) {
383 err = -EINVAL;
384 goto out;
385 }
386
387 if (ibcq->uobject) {
388 err = mlx4_alloc_resize_umem(dev, cq, entries, udata);
389 if (err)
390 goto out;
391 } else {
392 /* Can't be smaller than the number of outstanding CQEs */
393 outst_cqe = mlx4_ib_get_outstanding_cqes(cq);
394 if (entries < outst_cqe + 1) {
395 err = 0;
396 goto out;
397 }
398
399 err = mlx4_alloc_resize_buf(dev, cq, entries);
400 if (err)
401 goto out;
402 }
403
404 mtt = cq->buf.mtt;
405
406 err = mlx4_cq_resize(dev->dev, &cq->mcq, entries, &cq->resize_buf->buf.mtt);
407 if (err)
408 goto err_buf;
409
410 mlx4_mtt_cleanup(dev->dev, &mtt);
411 if (ibcq->uobject) {
412 cq->buf = cq->resize_buf->buf;
413 cq->ibcq.cqe = cq->resize_buf->cqe;
414 ib_umem_release(cq->umem);
415 cq->umem = cq->resize_umem;
416
417 kfree(cq->resize_buf);
418 cq->resize_buf = NULL;
419 cq->resize_umem = NULL;
420 } else {
421 struct mlx4_ib_cq_buf tmp_buf;
422 int tmp_cqe = 0;
423
424 spin_lock_irq(&cq->lock);
425 if (cq->resize_buf) {
426 mlx4_ib_cq_resize_copy_cqes(cq);
427 tmp_buf = cq->buf;
428 tmp_cqe = cq->ibcq.cqe;
429 cq->buf = cq->resize_buf->buf;
430 cq->ibcq.cqe = cq->resize_buf->cqe;
431
432 kfree(cq->resize_buf);
433 cq->resize_buf = NULL;
434 }
435 spin_unlock_irq(&cq->lock);
436
437 if (tmp_cqe)
438 mlx4_ib_free_cq_buf(dev, &tmp_buf, tmp_cqe);
439 }
440
441 goto out;
442
443 err_buf:
444 mlx4_mtt_cleanup(dev->dev, &cq->resize_buf->buf.mtt);
445 if (!ibcq->uobject)
446 mlx4_ib_free_cq_buf(dev, &cq->resize_buf->buf,
447 cq->resize_buf->cqe);
448
449 kfree(cq->resize_buf);
450 cq->resize_buf = NULL;
451
452 if (cq->resize_umem) {
453 ib_umem_release(cq->resize_umem);
454 cq->resize_umem = NULL;
455 }
456
457 out:
458 mutex_unlock(&cq->resize_mutex);
459
460 return err;
461 }
462
463 int mlx4_ib_destroy_cq(struct ib_cq *cq)
464 {
465 struct mlx4_ib_dev *dev = to_mdev(cq->device);
466 struct mlx4_ib_cq *mcq = to_mcq(cq);
467
468 mlx4_cq_free(dev->dev, &mcq->mcq);
469 mlx4_mtt_cleanup(dev->dev, &mcq->buf.mtt);
470
471 if (cq->uobject) {
472 mlx4_ib_db_unmap_user(to_mucontext(cq->uobject->context), &mcq->db);
473 ib_umem_release(mcq->umem);
474 } else {
475 mlx4_ib_free_cq_buf(dev, &mcq->buf, cq->cqe);
476 mlx4_db_free(dev->dev, &mcq->db);
477 }
478
479 kfree(mcq);
480
481 return 0;
482 }
483
484 static void dump_cqe(void *cqe)
485 {
486 __be32 *buf = cqe;
487
488 pr_debug("CQE contents %08x %08x %08x %08x %08x %08x %08x %08x\n",
489 be32_to_cpu(buf[0]), be32_to_cpu(buf[1]), be32_to_cpu(buf[2]),
490 be32_to_cpu(buf[3]), be32_to_cpu(buf[4]), be32_to_cpu(buf[5]),
491 be32_to_cpu(buf[6]), be32_to_cpu(buf[7]));
492 }
493
494 static void mlx4_ib_handle_error_cqe(struct mlx4_err_cqe *cqe,
495 struct ib_wc *wc)
496 {
497 if (cqe->syndrome == MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR) {
498 pr_debug("local QP operation err "
499 "(QPN %06x, WQE index %x, vendor syndrome %02x, "
500 "opcode = %02x)\n",
501 be32_to_cpu(cqe->my_qpn), be16_to_cpu(cqe->wqe_index),
502 cqe->vendor_err_syndrome,
503 cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
504 dump_cqe(cqe);
505 }
506
507 switch (cqe->syndrome) {
508 case MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR:
509 wc->status = IB_WC_LOC_LEN_ERR;
510 break;
511 case MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR:
512 wc->status = IB_WC_LOC_QP_OP_ERR;
513 break;
514 case MLX4_CQE_SYNDROME_LOCAL_PROT_ERR:
515 wc->status = IB_WC_LOC_PROT_ERR;
516 break;
517 case MLX4_CQE_SYNDROME_WR_FLUSH_ERR:
518 wc->status = IB_WC_WR_FLUSH_ERR;
519 break;
520 case MLX4_CQE_SYNDROME_MW_BIND_ERR:
521 wc->status = IB_WC_MW_BIND_ERR;
522 break;
523 case MLX4_CQE_SYNDROME_BAD_RESP_ERR:
524 wc->status = IB_WC_BAD_RESP_ERR;
525 break;
526 case MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR:
527 wc->status = IB_WC_LOC_ACCESS_ERR;
528 break;
529 case MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR:
530 wc->status = IB_WC_REM_INV_REQ_ERR;
531 break;
532 case MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR:
533 wc->status = IB_WC_REM_ACCESS_ERR;
534 break;
535 case MLX4_CQE_SYNDROME_REMOTE_OP_ERR:
536 wc->status = IB_WC_REM_OP_ERR;
537 break;
538 case MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR:
539 wc->status = IB_WC_RETRY_EXC_ERR;
540 break;
541 case MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR:
542 wc->status = IB_WC_RNR_RETRY_EXC_ERR;
543 break;
544 case MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR:
545 wc->status = IB_WC_REM_ABORT_ERR;
546 break;
547 default:
548 wc->status = IB_WC_GENERAL_ERR;
549 break;
550 }
551
552 wc->vendor_err = cqe->vendor_err_syndrome;
553 }
554
555 static int mlx4_ib_ipoib_csum_ok(__be16 status, __be16 checksum)
556 {
557 return ((status & cpu_to_be16(MLX4_CQE_STATUS_IPV4 |
558 MLX4_CQE_STATUS_IPV4F |
559 MLX4_CQE_STATUS_IPV4OPT |
560 MLX4_CQE_STATUS_IPV6 |
561 MLX4_CQE_STATUS_IPOK)) ==
562 cpu_to_be16(MLX4_CQE_STATUS_IPV4 |
563 MLX4_CQE_STATUS_IPOK)) &&
564 (status & cpu_to_be16(MLX4_CQE_STATUS_UDP |
565 MLX4_CQE_STATUS_TCP)) &&
566 checksum == cpu_to_be16(0xffff);
567 }
568
569 static int use_tunnel_data(struct mlx4_ib_qp *qp, struct mlx4_ib_cq *cq, struct ib_wc *wc,
570 unsigned tail, struct mlx4_cqe *cqe, int is_eth)
571 {
572 struct mlx4_ib_proxy_sqp_hdr *hdr;
573
574 ib_dma_sync_single_for_cpu(qp->ibqp.device,
575 qp->sqp_proxy_rcv[tail].map,
576 sizeof (struct mlx4_ib_proxy_sqp_hdr),
577 DMA_FROM_DEVICE);
578 hdr = (struct mlx4_ib_proxy_sqp_hdr *) (qp->sqp_proxy_rcv[tail].addr);
579 wc->pkey_index = be16_to_cpu(hdr->tun.pkey_index);
580 wc->src_qp = be32_to_cpu(hdr->tun.flags_src_qp) & 0xFFFFFF;
581 wc->wc_flags |= (hdr->tun.g_ml_path & 0x80) ? (IB_WC_GRH) : 0;
582 wc->dlid_path_bits = 0;
583
584 if (is_eth) {
585 wc->vlan_id = be16_to_cpu(hdr->tun.sl_vid);
586 memcpy(&(wc->smac[0]), (char *)&hdr->tun.mac_31_0, 4);
587 memcpy(&(wc->smac[4]), (char *)&hdr->tun.slid_mac_47_32, 2);
588 wc->wc_flags |= (IB_WC_WITH_VLAN | IB_WC_WITH_SMAC);
589 } else {
590 wc->slid = be16_to_cpu(hdr->tun.slid_mac_47_32);
591 wc->sl = (u8) (be16_to_cpu(hdr->tun.sl_vid) >> 12);
592 }
593
594 return 0;
595 }
596
597 static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
598 struct mlx4_ib_qp **cur_qp,
599 struct ib_wc *wc)
600 {
601 struct mlx4_cqe *cqe;
602 struct mlx4_qp *mqp;
603 struct mlx4_ib_wq *wq;
604 struct mlx4_ib_srq *srq;
605 struct mlx4_srq *msrq = NULL;
606 int is_send;
607 int is_error;
608 int is_eth;
609 u32 g_mlpath_rqpn;
610 u16 wqe_ctr;
611 unsigned tail = 0;
612
613 repoll:
614 cqe = next_cqe_sw(cq);
615 if (!cqe)
616 return -EAGAIN;
617
618 if (cq->buf.entry_size == 64)
619 cqe++;
620
621 ++cq->mcq.cons_index;
622
623 /*
624 * Make sure we read CQ entry contents after we've checked the
625 * ownership bit.
626 */
627 rmb();
628
629 is_send = cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK;
630 is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
631 MLX4_CQE_OPCODE_ERROR;
632
633 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_OPCODE_NOP &&
634 is_send)) {
635 pr_warn("Completion for NOP opcode detected!\n");
636 return -EINVAL;
637 }
638
639 /* Resize CQ in progress */
640 if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_CQE_OPCODE_RESIZE)) {
641 if (cq->resize_buf) {
642 struct mlx4_ib_dev *dev = to_mdev(cq->ibcq.device);
643
644 mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
645 cq->buf = cq->resize_buf->buf;
646 cq->ibcq.cqe = cq->resize_buf->cqe;
647
648 kfree(cq->resize_buf);
649 cq->resize_buf = NULL;
650 }
651
652 goto repoll;
653 }
654
655 if (!*cur_qp ||
656 (be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK) != (*cur_qp)->mqp.qpn) {
657 /*
658 * We do not have to take the QP table lock here,
659 * because CQs will be locked while QPs are removed
660 * from the table.
661 */
662 mqp = __mlx4_qp_lookup(to_mdev(cq->ibcq.device)->dev,
663 be32_to_cpu(cqe->vlan_my_qpn));
664 if (unlikely(!mqp)) {
665 pr_warn("CQ %06x with entry for unknown QPN %06x\n",
666 cq->mcq.cqn, be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK);
667 return -EINVAL;
668 }
669
670 *cur_qp = to_mibqp(mqp);
671 }
672
673 wc->qp = &(*cur_qp)->ibqp;
674
675 if (wc->qp->qp_type == IB_QPT_XRC_TGT) {
676 u32 srq_num;
677 g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn);
678 srq_num = g_mlpath_rqpn & 0xffffff;
679 /* SRQ is also in the radix tree */
680 msrq = mlx4_srq_lookup(to_mdev(cq->ibcq.device)->dev,
681 srq_num);
682 if (unlikely(!msrq)) {
683 pr_warn("CQ %06x with entry for unknown SRQN %06x\n",
684 cq->mcq.cqn, srq_num);
685 return -EINVAL;
686 }
687 }
688
689 if (is_send) {
690 wq = &(*cur_qp)->sq;
691 if (!(*cur_qp)->sq_signal_bits) {
692 wqe_ctr = be16_to_cpu(cqe->wqe_index);
693 wq->tail += (u16) (wqe_ctr - (u16) wq->tail);
694 }
695 wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)];
696 ++wq->tail;
697 } else if ((*cur_qp)->ibqp.srq) {
698 srq = to_msrq((*cur_qp)->ibqp.srq);
699 wqe_ctr = be16_to_cpu(cqe->wqe_index);
700 wc->wr_id = srq->wrid[wqe_ctr];
701 mlx4_ib_free_srq_wqe(srq, wqe_ctr);
702 } else if (msrq) {
703 srq = to_mibsrq(msrq);
704 wqe_ctr = be16_to_cpu(cqe->wqe_index);
705 wc->wr_id = srq->wrid[wqe_ctr];
706 mlx4_ib_free_srq_wqe(srq, wqe_ctr);
707 } else {
708 wq = &(*cur_qp)->rq;
709 tail = wq->tail & (wq->wqe_cnt - 1);
710 wc->wr_id = wq->wrid[tail];
711 ++wq->tail;
712 }
713
714 if (unlikely(is_error)) {
715 mlx4_ib_handle_error_cqe((struct mlx4_err_cqe *) cqe, wc);
716 return 0;
717 }
718
719 wc->status = IB_WC_SUCCESS;
720
721 if (is_send) {
722 wc->wc_flags = 0;
723 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
724 case MLX4_OPCODE_RDMA_WRITE_IMM:
725 wc->wc_flags |= IB_WC_WITH_IMM;
726 case MLX4_OPCODE_RDMA_WRITE:
727 wc->opcode = IB_WC_RDMA_WRITE;
728 break;
729 case MLX4_OPCODE_SEND_IMM:
730 wc->wc_flags |= IB_WC_WITH_IMM;
731 case MLX4_OPCODE_SEND:
732 case MLX4_OPCODE_SEND_INVAL:
733 wc->opcode = IB_WC_SEND;
734 break;
735 case MLX4_OPCODE_RDMA_READ:
736 wc->opcode = IB_WC_RDMA_READ;
737 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
738 break;
739 case MLX4_OPCODE_ATOMIC_CS:
740 wc->opcode = IB_WC_COMP_SWAP;
741 wc->byte_len = 8;
742 break;
743 case MLX4_OPCODE_ATOMIC_FA:
744 wc->opcode = IB_WC_FETCH_ADD;
745 wc->byte_len = 8;
746 break;
747 case MLX4_OPCODE_MASKED_ATOMIC_CS:
748 wc->opcode = IB_WC_MASKED_COMP_SWAP;
749 wc->byte_len = 8;
750 break;
751 case MLX4_OPCODE_MASKED_ATOMIC_FA:
752 wc->opcode = IB_WC_MASKED_FETCH_ADD;
753 wc->byte_len = 8;
754 break;
755 case MLX4_OPCODE_BIND_MW:
756 wc->opcode = IB_WC_BIND_MW;
757 break;
758 case MLX4_OPCODE_LSO:
759 wc->opcode = IB_WC_LSO;
760 break;
761 case MLX4_OPCODE_FMR:
762 wc->opcode = IB_WC_FAST_REG_MR;
763 break;
764 case MLX4_OPCODE_LOCAL_INVAL:
765 wc->opcode = IB_WC_LOCAL_INV;
766 break;
767 }
768 } else {
769 wc->byte_len = be32_to_cpu(cqe->byte_cnt);
770
771 switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
772 case MLX4_RECV_OPCODE_RDMA_WRITE_IMM:
773 wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
774 wc->wc_flags = IB_WC_WITH_IMM;
775 wc->ex.imm_data = cqe->immed_rss_invalid;
776 break;
777 case MLX4_RECV_OPCODE_SEND_INVAL:
778 wc->opcode = IB_WC_RECV;
779 wc->wc_flags = IB_WC_WITH_INVALIDATE;
780 wc->ex.invalidate_rkey = be32_to_cpu(cqe->immed_rss_invalid);
781 break;
782 case MLX4_RECV_OPCODE_SEND:
783 wc->opcode = IB_WC_RECV;
784 wc->wc_flags = 0;
785 break;
786 case MLX4_RECV_OPCODE_SEND_IMM:
787 wc->opcode = IB_WC_RECV;
788 wc->wc_flags = IB_WC_WITH_IMM;
789 wc->ex.imm_data = cqe->immed_rss_invalid;
790 break;
791 }
792
793 is_eth = (rdma_port_get_link_layer(wc->qp->device,
794 (*cur_qp)->port) ==
795 IB_LINK_LAYER_ETHERNET);
796 if (mlx4_is_mfunc(to_mdev(cq->ibcq.device)->dev)) {
797 if ((*cur_qp)->mlx4_ib_qp_type &
798 (MLX4_IB_QPT_PROXY_SMI_OWNER |
799 MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
800 return use_tunnel_data(*cur_qp, cq, wc, tail,
801 cqe, is_eth);
802 }
803
804 wc->slid = be16_to_cpu(cqe->rlid);
805 g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn);
806 wc->src_qp = g_mlpath_rqpn & 0xffffff;
807 wc->dlid_path_bits = (g_mlpath_rqpn >> 24) & 0x7f;
808 wc->wc_flags |= g_mlpath_rqpn & 0x80000000 ? IB_WC_GRH : 0;
809 wc->pkey_index = be32_to_cpu(cqe->immed_rss_invalid) & 0x7f;
810 wc->wc_flags |= mlx4_ib_ipoib_csum_ok(cqe->status,
811 cqe->checksum) ? IB_WC_IP_CSUM_OK : 0;
812 if (is_eth) {
813 wc->sl = be16_to_cpu(cqe->sl_vid) >> 13;
814 if (be32_to_cpu(cqe->vlan_my_qpn) &
815 MLX4_CQE_VLAN_PRESENT_MASK) {
816 wc->vlan_id = be16_to_cpu(cqe->sl_vid) &
817 MLX4_CQE_VID_MASK;
818 } else {
819 wc->vlan_id = 0xffff;
820 }
821 memcpy(wc->smac, cqe->smac, ETH_ALEN);
822 wc->wc_flags |= (IB_WC_WITH_VLAN | IB_WC_WITH_SMAC);
823 } else {
824 wc->sl = be16_to_cpu(cqe->sl_vid) >> 12;
825 wc->vlan_id = 0xffff;
826 }
827 }
828
829 return 0;
830 }
831
832 int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
833 {
834 struct mlx4_ib_cq *cq = to_mcq(ibcq);
835 struct mlx4_ib_qp *cur_qp = NULL;
836 unsigned long flags;
837 int npolled;
838 int err = 0;
839
840 spin_lock_irqsave(&cq->lock, flags);
841
842 for (npolled = 0; npolled < num_entries; ++npolled) {
843 err = mlx4_ib_poll_one(cq, &cur_qp, wc + npolled);
844 if (err)
845 break;
846 }
847
848 mlx4_cq_set_ci(&cq->mcq);
849
850 spin_unlock_irqrestore(&cq->lock, flags);
851
852 if (err == 0 || err == -EAGAIN)
853 return npolled;
854 else
855 return err;
856 }
857
858 int mlx4_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
859 {
860 mlx4_cq_arm(&to_mcq(ibcq)->mcq,
861 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
862 MLX4_CQ_DB_REQ_NOT_SOL : MLX4_CQ_DB_REQ_NOT,
863 to_mdev(ibcq->device)->uar_map,
864 MLX4_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->uar_lock));
865
866 return 0;
867 }
868
869 void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
870 {
871 u32 prod_index;
872 int nfreed = 0;
873 struct mlx4_cqe *cqe, *dest;
874 u8 owner_bit;
875 int cqe_inc = cq->buf.entry_size == 64 ? 1 : 0;
876
877 /*
878 * First we need to find the current producer index, so we
879 * know where to start cleaning from. It doesn't matter if HW
880 * adds new entries after this loop -- the QP we're worried
881 * about is already in RESET, so the new entries won't come
882 * from our QP and therefore don't need to be checked.
883 */
884 for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); ++prod_index)
885 if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe)
886 break;
887
888 /*
889 * Now sweep backwards through the CQ, removing CQ entries
890 * that match our QP by copying older entries on top of them.
891 */
892 while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) {
893 cqe = get_cqe(cq, prod_index & cq->ibcq.cqe);
894 cqe += cqe_inc;
895
896 if ((be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK) == qpn) {
897 if (srq && !(cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK))
898 mlx4_ib_free_srq_wqe(srq, be16_to_cpu(cqe->wqe_index));
899 ++nfreed;
900 } else if (nfreed) {
901 dest = get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe);
902 dest += cqe_inc;
903
904 owner_bit = dest->owner_sr_opcode & MLX4_CQE_OWNER_MASK;
905 memcpy(dest, cqe, sizeof *cqe);
906 dest->owner_sr_opcode = owner_bit |
907 (dest->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
908 }
909 }
910
911 if (nfreed) {
912 cq->mcq.cons_index += nfreed;
913 /*
914 * Make sure update of buffer contents is done before
915 * updating consumer index.
916 */
917 wmb();
918 mlx4_cq_set_ci(&cq->mcq);
919 }
920 }
921
922 void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
923 {
924 spin_lock_irq(&cq->lock);
925 __mlx4_ib_cq_clean(cq, qpn, srq);
926 spin_unlock_irq(&cq->lock);
927 }
Linux kernel - Deliverables
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