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225c7b1f RD |
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 | { | |
1c69fc2a | 67 | return mlx4_buf_offset(&buf->buf, n * sizeof (struct mlx4_cqe)); |
225c7b1f RD |
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 | ||
3fdcb97f EC |
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 | ||
bbf8eed1 VS |
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), | |
cb9fbc5c | 140 | IB_ACCESS_LOCAL_WRITE, 1); |
bbf8eed1 VS |
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 | ||
225c7b1f RD |
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; | |
225c7b1f RD |
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; | |
bbf8eed1 | 182 | mutex_init(&cq->resize_mutex); |
225c7b1f | 183 | spin_lock_init(&cq->lock); |
bbf8eed1 VS |
184 | cq->resize_buf = NULL; |
185 | cq->resize_umem = NULL; | |
225c7b1f RD |
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 | ||
bbf8eed1 VS |
195 | err = mlx4_ib_get_cq_umem(dev, context, &cq->buf, &cq->umem, |
196 | ucmd.buf_addr, entries); | |
225c7b1f | 197 | if (err) |
bbf8eed1 | 198 | goto err_cq; |
225c7b1f RD |
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 { | |
6296883c | 207 | err = mlx4_db_alloc(dev->dev, &cq->db, 1); |
225c7b1f RD |
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 | ||
bbf8eed1 | 216 | err = mlx4_ib_alloc_cq_buf(dev, &cq->buf, entries); |
225c7b1f | 217 | if (err) |
bbf8eed1 | 218 | goto err_db; |
225c7b1f RD |
219 | |
220 | uar = &dev->priv_uar; | |
221 | } | |
222 | ||
223 | err = mlx4_cq_alloc(dev->dev, entries, &cq->buf.mtt, uar, | |
e463c7b1 | 224 | cq->db.dma, &cq->mcq, 0); |
225c7b1f RD |
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 | ||
225c7b1f RD |
246 | if (context) |
247 | ib_umem_release(cq->umem); | |
248 | else | |
bbf8eed1 | 249 | mlx4_ib_free_cq_buf(dev, &cq->buf, entries); |
225c7b1f RD |
250 | |
251 | err_db: | |
252 | if (!context) | |
6296883c | 253 | mlx4_db_free(dev->dev, &cq->db); |
225c7b1f RD |
254 | |
255 | err_cq: | |
256 | kfree(cq); | |
257 | ||
258 | return ERR_PTR(err); | |
259 | } | |
260 | ||
bbf8eed1 VS |
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 | ||
225c7b1f RD |
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 { | |
bbf8eed1 | 437 | mlx4_ib_free_cq_buf(dev, &mcq->buf, cq->cqe + 1); |
6296883c | 438 | mlx4_db_free(dev->dev, &mcq->db); |
225c7b1f RD |
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 | ||
8ff095ec EC |
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 | ||
225c7b1f RD |
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; | |
b3226184 | 541 | u32 g_mlpath_rqpn; |
225c7b1f RD |
542 | u16 wqe_ctr; |
543 | ||
bbf8eed1 | 544 | repoll: |
225c7b1f RD |
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 | ||
ea54b10c JM |
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 | ||
bbf8eed1 VS |
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 | ||
225c7b1f RD |
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; | |
ea54b10c JM |
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 | } | |
0e6e7416 | 609 | wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; |
225c7b1f RD |
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; | |
0e6e7416 | 618 | wc->wr_id = wq->wrid[wq->tail & (wq->wqe_cnt - 1)]; |
225c7b1f RD |
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: | |
19891915 | 643 | wc->opcode = IB_WC_RDMA_READ; |
225c7b1f RD |
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; | |
b832be1e EC |
657 | case MLX4_OPCODE_LSO: |
658 | wc->opcode = IB_WC_LSO; | |
659 | break; | |
225c7b1f RD |
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; | |
b3226184 RD |
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; | |
e1bb7843 | 687 | wc->pkey_index = be32_to_cpu(cqe->immed_rss_invalid) & 0x7f; |
8ff095ec EC |
688 | wc->csum_ok = mlx4_ib_ipoib_csum_ok(cqe->ipoib_status, |
689 | cqe->checksum); | |
225c7b1f RD |
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; | |
082dee32 JM |
737 | struct mlx4_cqe *cqe, *dest; |
738 | u8 owner_bit; | |
225c7b1f RD |
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; | |
082dee32 JM |
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 | } | |
225c7b1f RD |
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 | } |