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Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / net / ethernet / mellanox / mlx5 / core / eq.c
blob713ead583347f1002bd8022ed443466b3e1bf11a
1 /*
2 * Copyright (c) 2013-2015, Mellanox Technologies. 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/interrupt.h>
34 #include <linux/module.h>
35 #include <linux/mlx5/driver.h>
36 #include <linux/mlx5/cmd.h>
37 #include "mlx5_core.h"
38
39 enum {
40 MLX5_EQE_SIZE = sizeof(struct mlx5_eqe),
41 MLX5_EQE_OWNER_INIT_VAL = 0x1,
42 };
43
44 enum {
45 MLX5_EQ_STATE_ARMED = 0x9,
46 MLX5_EQ_STATE_FIRED = 0xa,
47 MLX5_EQ_STATE_ALWAYS_ARMED = 0xb,
48 };
49
50 enum {
51 MLX5_NUM_SPARE_EQE = 0x80,
52 MLX5_NUM_ASYNC_EQE = 0x100,
53 MLX5_NUM_CMD_EQE = 32,
54 };
55
56 enum {
57 MLX5_EQ_DOORBEL_OFFSET = 0x40,
58 };
59
60 #define MLX5_ASYNC_EVENT_MASK ((1ull << MLX5_EVENT_TYPE_PATH_MIG) | \
61 (1ull << MLX5_EVENT_TYPE_COMM_EST) | \
62 (1ull << MLX5_EVENT_TYPE_SQ_DRAINED) | \
63 (1ull << MLX5_EVENT_TYPE_CQ_ERROR) | \
64 (1ull << MLX5_EVENT_TYPE_WQ_CATAS_ERROR) | \
65 (1ull << MLX5_EVENT_TYPE_PATH_MIG_FAILED) | \
66 (1ull << MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
67 (1ull << MLX5_EVENT_TYPE_WQ_ACCESS_ERROR) | \
68 (1ull << MLX5_EVENT_TYPE_PORT_CHANGE) | \
69 (1ull << MLX5_EVENT_TYPE_SRQ_CATAS_ERROR) | \
70 (1ull << MLX5_EVENT_TYPE_SRQ_LAST_WQE) | \
71 (1ull << MLX5_EVENT_TYPE_SRQ_RQ_LIMIT))
72
73 struct map_eq_in {
74 u64 mask;
75 u32 reserved;
76 u32 unmap_eqn;
77 };
78
79 struct cre_des_eq {
80 u8 reserved[15];
81 u8 eqn;
82 };
83
84 static int mlx5_cmd_destroy_eq(struct mlx5_core_dev *dev, u8 eqn)
85 {
86 struct mlx5_destroy_eq_mbox_in in;
87 struct mlx5_destroy_eq_mbox_out out;
88 int err;
89
90 memset(&in, 0, sizeof(in));
91 memset(&out, 0, sizeof(out));
92 in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_EQ);
93 in.eqn = eqn;
94 err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
95 if (!err)
96 goto ex;
97
98 if (out.hdr.status)
99 err = mlx5_cmd_status_to_err(&out.hdr);
100
101 ex:
102 return err;
103 }
104
105 static struct mlx5_eqe *get_eqe(struct mlx5_eq *eq, u32 entry)
106 {
107 return mlx5_buf_offset(&eq->buf, entry * MLX5_EQE_SIZE);
108 }
109
110 static struct mlx5_eqe *next_eqe_sw(struct mlx5_eq *eq)
111 {
112 struct mlx5_eqe *eqe = get_eqe(eq, eq->cons_index & (eq->nent - 1));
113
114 return ((eqe->owner & 1) ^ !!(eq->cons_index & eq->nent)) ? NULL : eqe;
115 }
116
117 static const char *eqe_type_str(u8 type)
118 {
119 switch (type) {
120 case MLX5_EVENT_TYPE_COMP:
121 return "MLX5_EVENT_TYPE_COMP";
122 case MLX5_EVENT_TYPE_PATH_MIG:
123 return "MLX5_EVENT_TYPE_PATH_MIG";
124 case MLX5_EVENT_TYPE_COMM_EST:
125 return "MLX5_EVENT_TYPE_COMM_EST";
126 case MLX5_EVENT_TYPE_SQ_DRAINED:
127 return "MLX5_EVENT_TYPE_SQ_DRAINED";
128 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
129 return "MLX5_EVENT_TYPE_SRQ_LAST_WQE";
130 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
131 return "MLX5_EVENT_TYPE_SRQ_RQ_LIMIT";
132 case MLX5_EVENT_TYPE_CQ_ERROR:
133 return "MLX5_EVENT_TYPE_CQ_ERROR";
134 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
135 return "MLX5_EVENT_TYPE_WQ_CATAS_ERROR";
136 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
137 return "MLX5_EVENT_TYPE_PATH_MIG_FAILED";
138 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
139 return "MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR";
140 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
141 return "MLX5_EVENT_TYPE_WQ_ACCESS_ERROR";
142 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
143 return "MLX5_EVENT_TYPE_SRQ_CATAS_ERROR";
144 case MLX5_EVENT_TYPE_INTERNAL_ERROR:
145 return "MLX5_EVENT_TYPE_INTERNAL_ERROR";
146 case MLX5_EVENT_TYPE_PORT_CHANGE:
147 return "MLX5_EVENT_TYPE_PORT_CHANGE";
148 case MLX5_EVENT_TYPE_GPIO_EVENT:
149 return "MLX5_EVENT_TYPE_GPIO_EVENT";
150 case MLX5_EVENT_TYPE_REMOTE_CONFIG:
151 return "MLX5_EVENT_TYPE_REMOTE_CONFIG";
152 case MLX5_EVENT_TYPE_DB_BF_CONGESTION:
153 return "MLX5_EVENT_TYPE_DB_BF_CONGESTION";
154 case MLX5_EVENT_TYPE_STALL_EVENT:
155 return "MLX5_EVENT_TYPE_STALL_EVENT";
156 case MLX5_EVENT_TYPE_CMD:
157 return "MLX5_EVENT_TYPE_CMD";
158 case MLX5_EVENT_TYPE_PAGE_REQUEST:
159 return "MLX5_EVENT_TYPE_PAGE_REQUEST";
160 case MLX5_EVENT_TYPE_PAGE_FAULT:
161 return "MLX5_EVENT_TYPE_PAGE_FAULT";
162 default:
163 return "Unrecognized event";
164 }
165 }
166
167 static enum mlx5_dev_event port_subtype_event(u8 subtype)
168 {
169 switch (subtype) {
170 case MLX5_PORT_CHANGE_SUBTYPE_DOWN:
171 return MLX5_DEV_EVENT_PORT_DOWN;
172 case MLX5_PORT_CHANGE_SUBTYPE_ACTIVE:
173 return MLX5_DEV_EVENT_PORT_UP;
174 case MLX5_PORT_CHANGE_SUBTYPE_INITIALIZED:
175 return MLX5_DEV_EVENT_PORT_INITIALIZED;
176 case MLX5_PORT_CHANGE_SUBTYPE_LID:
177 return MLX5_DEV_EVENT_LID_CHANGE;
178 case MLX5_PORT_CHANGE_SUBTYPE_PKEY:
179 return MLX5_DEV_EVENT_PKEY_CHANGE;
180 case MLX5_PORT_CHANGE_SUBTYPE_GUID:
181 return MLX5_DEV_EVENT_GUID_CHANGE;
182 case MLX5_PORT_CHANGE_SUBTYPE_CLIENT_REREG:
183 return MLX5_DEV_EVENT_CLIENT_REREG;
184 }
185 return -1;
186 }
187
188 static void eq_update_ci(struct mlx5_eq *eq, int arm)
189 {
190 __be32 __iomem *addr = eq->doorbell + (arm ? 0 : 2);
191 u32 val = (eq->cons_index & 0xffffff) | (eq->eqn << 24);
192 __raw_writel((__force u32) cpu_to_be32(val), addr);
193 /* We still want ordering, just not swabbing, so add a barrier */
194 mb();
195 }
196
197 static int mlx5_eq_int(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
198 {
199 struct mlx5_eqe *eqe;
200 int eqes_found = 0;
201 int set_ci = 0;
202 u32 cqn;
203 u32 rsn;
204 u8 port;
205
206 while ((eqe = next_eqe_sw(eq))) {
207 /*
208 * Make sure we read EQ entry contents after we've
209 * checked the ownership bit.
210 */
211 dma_rmb();
212
213 mlx5_core_dbg(eq->dev, "eqn %d, eqe type %s\n",
214 eq->eqn, eqe_type_str(eqe->type));
215 switch (eqe->type) {
216 case MLX5_EVENT_TYPE_COMP:
217 cqn = be32_to_cpu(eqe->data.comp.cqn) & 0xffffff;
218 mlx5_cq_completion(dev, cqn);
219 break;
220
221 case MLX5_EVENT_TYPE_PATH_MIG:
222 case MLX5_EVENT_TYPE_COMM_EST:
223 case MLX5_EVENT_TYPE_SQ_DRAINED:
224 case MLX5_EVENT_TYPE_SRQ_LAST_WQE:
225 case MLX5_EVENT_TYPE_WQ_CATAS_ERROR:
226 case MLX5_EVENT_TYPE_PATH_MIG_FAILED:
227 case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
228 case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR:
229 rsn = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
230 mlx5_core_dbg(dev, "event %s(%d) arrived on resource 0x%x\n",
231 eqe_type_str(eqe->type), eqe->type, rsn);
232 mlx5_rsc_event(dev, rsn, eqe->type);
233 break;
234
235 case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
236 case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
237 rsn = be32_to_cpu(eqe->data.qp_srq.qp_srq_n) & 0xffffff;
238 mlx5_core_dbg(dev, "SRQ event %s(%d): srqn 0x%x\n",
239 eqe_type_str(eqe->type), eqe->type, rsn);
240 mlx5_srq_event(dev, rsn, eqe->type);
241 break;
242
243 case MLX5_EVENT_TYPE_CMD:
244 mlx5_cmd_comp_handler(dev, be32_to_cpu(eqe->data.cmd.vector));
245 break;
246
247 case MLX5_EVENT_TYPE_PORT_CHANGE:
248 port = (eqe->data.port.port >> 4) & 0xf;
249 switch (eqe->sub_type) {
250 case MLX5_PORT_CHANGE_SUBTYPE_DOWN:
251 case MLX5_PORT_CHANGE_SUBTYPE_ACTIVE:
252 case MLX5_PORT_CHANGE_SUBTYPE_LID:
253 case MLX5_PORT_CHANGE_SUBTYPE_PKEY:
254 case MLX5_PORT_CHANGE_SUBTYPE_GUID:
255 case MLX5_PORT_CHANGE_SUBTYPE_CLIENT_REREG:
256 case MLX5_PORT_CHANGE_SUBTYPE_INITIALIZED:
257 if (dev->event)
258 dev->event(dev, port_subtype_event(eqe->sub_type),
259 (unsigned long)port);
260 break;
261 default:
262 mlx5_core_warn(dev, "Port event with unrecognized subtype: port %d, sub_type %d\n",
263 port, eqe->sub_type);
264 }
265 break;
266 case MLX5_EVENT_TYPE_CQ_ERROR:
267 cqn = be32_to_cpu(eqe->data.cq_err.cqn) & 0xffffff;
268 mlx5_core_warn(dev, "CQ error on CQN 0x%x, syndrom 0x%x\n",
269 cqn, eqe->data.cq_err.syndrome);
270 mlx5_cq_event(dev, cqn, eqe->type);
271 break;
272
273 case MLX5_EVENT_TYPE_PAGE_REQUEST:
274 {
275 u16 func_id = be16_to_cpu(eqe->data.req_pages.func_id);
276 s32 npages = be32_to_cpu(eqe->data.req_pages.num_pages);
277
278 mlx5_core_dbg(dev, "page request for func 0x%x, npages %d\n",
279 func_id, npages);
280 mlx5_core_req_pages_handler(dev, func_id, npages);
281 }
282 break;
283
284 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
285 case MLX5_EVENT_TYPE_PAGE_FAULT:
286 mlx5_eq_pagefault(dev, eqe);
287 break;
288 #endif
289
290 default:
291 mlx5_core_warn(dev, "Unhandled event 0x%x on EQ 0x%x\n",
292 eqe->type, eq->eqn);
293 break;
294 }
295
296 ++eq->cons_index;
297 eqes_found = 1;
298 ++set_ci;
299
300 /* The HCA will think the queue has overflowed if we
301 * don't tell it we've been processing events. We
302 * create our EQs with MLX5_NUM_SPARE_EQE extra
303 * entries, so we must update our consumer index at
304 * least that often.
305 */
306 if (unlikely(set_ci >= MLX5_NUM_SPARE_EQE)) {
307 eq_update_ci(eq, 0);
308 set_ci = 0;
309 }
310 }
311
312 eq_update_ci(eq, 1);
313
314 return eqes_found;
315 }
316
317 static irqreturn_t mlx5_msix_handler(int irq, void *eq_ptr)
318 {
319 struct mlx5_eq *eq = eq_ptr;
320 struct mlx5_core_dev *dev = eq->dev;
321
322 mlx5_eq_int(dev, eq);
323
324 /* MSI-X vectors always belong to us */
325 return IRQ_HANDLED;
326 }
327
328 static void init_eq_buf(struct mlx5_eq *eq)
329 {
330 struct mlx5_eqe *eqe;
331 int i;
332
333 for (i = 0; i < eq->nent; i++) {
334 eqe = get_eqe(eq, i);
335 eqe->owner = MLX5_EQE_OWNER_INIT_VAL;
336 }
337 }
338
339 int mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
340 int nent, u64 mask, const char *name, struct mlx5_uar *uar)
341 {
342 struct mlx5_priv *priv = &dev->priv;
343 struct mlx5_create_eq_mbox_in *in;
344 struct mlx5_create_eq_mbox_out out;
345 int err;
346 int inlen;
347
348 eq->nent = roundup_pow_of_two(nent + MLX5_NUM_SPARE_EQE);
349 eq->cons_index = 0;
350 err = mlx5_buf_alloc(dev, eq->nent * MLX5_EQE_SIZE, &eq->buf);
351 if (err)
352 return err;
353
354 init_eq_buf(eq);
355
356 inlen = sizeof(*in) + sizeof(in->pas[0]) * eq->buf.npages;
357 in = mlx5_vzalloc(inlen);
358 if (!in) {
359 err = -ENOMEM;
360 goto err_buf;
361 }
362 memset(&out, 0, sizeof(out));
363
364 mlx5_fill_page_array(&eq->buf, in->pas);
365
366 in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_EQ);
367 in->ctx.log_sz_usr_page = cpu_to_be32(ilog2(eq->nent) << 24 | uar->index);
368 in->ctx.intr = vecidx;
369 in->ctx.log_page_size = eq->buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT;
370 in->events_mask = cpu_to_be64(mask);
371
372 err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out));
373 if (err)
374 goto err_in;
375
376 if (out.hdr.status) {
377 err = mlx5_cmd_status_to_err(&out.hdr);
378 goto err_in;
379 }
380
381 snprintf(priv->irq_info[vecidx].name, MLX5_MAX_IRQ_NAME, "%s@pci:%s",
382 name, pci_name(dev->pdev));
383
384 eq->eqn = out.eq_number;
385 eq->irqn = priv->msix_arr[vecidx].vector;
386 eq->dev = dev;
387 eq->doorbell = uar->map + MLX5_EQ_DOORBEL_OFFSET;
388 err = request_irq(eq->irqn, mlx5_msix_handler, 0,
389 priv->irq_info[vecidx].name, eq);
390 if (err)
391 goto err_eq;
392
393 err = mlx5_debug_eq_add(dev, eq);
394 if (err)
395 goto err_irq;
396
397 /* EQs are created in ARMED state
398 */
399 eq_update_ci(eq, 1);
400
401 kvfree(in);
402 return 0;
403
404 err_irq:
405 free_irq(priv->msix_arr[vecidx].vector, eq);
406
407 err_eq:
408 mlx5_cmd_destroy_eq(dev, eq->eqn);
409
410 err_in:
411 kvfree(in);
412
413 err_buf:
414 mlx5_buf_free(dev, &eq->buf);
415 return err;
416 }
417 EXPORT_SYMBOL_GPL(mlx5_create_map_eq);
418
419 int mlx5_destroy_unmap_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq)
420 {
421 int err;
422
423 mlx5_debug_eq_remove(dev, eq);
424 free_irq(eq->irqn, eq);
425 err = mlx5_cmd_destroy_eq(dev, eq->eqn);
426 if (err)
427 mlx5_core_warn(dev, "failed to destroy a previously created eq: eqn %d\n",
428 eq->eqn);
429 synchronize_irq(eq->irqn);
430 mlx5_buf_free(dev, &eq->buf);
431
432 return err;
433 }
434 EXPORT_SYMBOL_GPL(mlx5_destroy_unmap_eq);
435
436 int mlx5_eq_init(struct mlx5_core_dev *dev)
437 {
438 int err;
439
440 spin_lock_init(&dev->priv.eq_table.lock);
441
442 err = mlx5_eq_debugfs_init(dev);
443
444 return err;
445 }
446
447
448 void mlx5_eq_cleanup(struct mlx5_core_dev *dev)
449 {
450 mlx5_eq_debugfs_cleanup(dev);
451 }
452
453 int mlx5_start_eqs(struct mlx5_core_dev *dev)
454 {
455 struct mlx5_eq_table *table = &dev->priv.eq_table;
456 u32 async_event_mask = MLX5_ASYNC_EVENT_MASK;
457 int err;
458
459 if (MLX5_CAP_GEN(dev, pg))
460 async_event_mask |= (1ull << MLX5_EVENT_TYPE_PAGE_FAULT);
461
462 err = mlx5_create_map_eq(dev, &table->cmd_eq, MLX5_EQ_VEC_CMD,
463 MLX5_NUM_CMD_EQE, 1ull << MLX5_EVENT_TYPE_CMD,
464 "mlx5_cmd_eq", &dev->priv.uuari.uars[0]);
465 if (err) {
466 mlx5_core_warn(dev, "failed to create cmd EQ %d\n", err);
467 return err;
468 }
469
470 mlx5_cmd_use_events(dev);
471
472 err = mlx5_create_map_eq(dev, &table->async_eq, MLX5_EQ_VEC_ASYNC,
473 MLX5_NUM_ASYNC_EQE, async_event_mask,
474 "mlx5_async_eq", &dev->priv.uuari.uars[0]);
475 if (err) {
476 mlx5_core_warn(dev, "failed to create async EQ %d\n", err);
477 goto err1;
478 }
479
480 err = mlx5_create_map_eq(dev, &table->pages_eq,
481 MLX5_EQ_VEC_PAGES,
482 /* TODO: sriov max_vf + */ 1,
483 1 << MLX5_EVENT_TYPE_PAGE_REQUEST, "mlx5_pages_eq",
484 &dev->priv.uuari.uars[0]);
485 if (err) {
486 mlx5_core_warn(dev, "failed to create pages EQ %d\n", err);
487 goto err2;
488 }
489
490 return err;
491
492 err2:
493 mlx5_destroy_unmap_eq(dev, &table->async_eq);
494
495 err1:
496 mlx5_cmd_use_polling(dev);
497 mlx5_destroy_unmap_eq(dev, &table->cmd_eq);
498 return err;
499 }
500
501 int mlx5_stop_eqs(struct mlx5_core_dev *dev)
502 {
503 struct mlx5_eq_table *table = &dev->priv.eq_table;
504 int err;
505
506 err = mlx5_destroy_unmap_eq(dev, &table->pages_eq);
507 if (err)
508 return err;
509
510 mlx5_destroy_unmap_eq(dev, &table->async_eq);
511 mlx5_cmd_use_polling(dev);
512
513 err = mlx5_destroy_unmap_eq(dev, &table->cmd_eq);
514 if (err)
515 mlx5_cmd_use_events(dev);
516
517 return err;
518 }
519
520 int mlx5_core_eq_query(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
521 struct mlx5_query_eq_mbox_out *out, int outlen)
522 {
523 struct mlx5_query_eq_mbox_in in;
524 int err;
525
526 memset(&in, 0, sizeof(in));
527 memset(out, 0, outlen);
528 in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_EQ);
529 in.eqn = eq->eqn;
530 err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen);
531 if (err)
532 return err;
533
534 if (out->hdr.status)
535 err = mlx5_cmd_status_to_err(&out->hdr);
536
537 return err;
538 }
539 EXPORT_SYMBOL_GPL(mlx5_core_eq_query);
Linux with added FPC-III support