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e126ba97 EC |
1 | /* |
2 | * Copyright (c) 2013, Mellanox Technologies 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 <asm-generic/kmap_types.h> | |
34 | #include <linux/module.h> | |
e126ba97 EC |
35 | #include <linux/errno.h> |
36 | #include <linux/pci.h> | |
37 | #include <linux/dma-mapping.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/delay.h> | |
40 | #include <linux/random.h> | |
41 | #include <linux/io-mapping.h> | |
42 | #include <linux/mlx5/driver.h> | |
43 | #include <linux/debugfs.h> | |
44 | ||
45 | #include "mlx5_core.h" | |
46 | ||
47 | enum { | |
0a324f31 | 48 | CMD_IF_REV = 5, |
e126ba97 EC |
49 | }; |
50 | ||
51 | enum { | |
52 | CMD_MODE_POLLING, | |
53 | CMD_MODE_EVENTS | |
54 | }; | |
55 | ||
56 | enum { | |
57 | NUM_LONG_LISTS = 2, | |
58 | NUM_MED_LISTS = 64, | |
59 | LONG_LIST_SIZE = (2ULL * 1024 * 1024 * 1024 / PAGE_SIZE) * 8 + 16 + | |
60 | MLX5_CMD_DATA_BLOCK_SIZE, | |
61 | MED_LIST_SIZE = 16 + MLX5_CMD_DATA_BLOCK_SIZE, | |
62 | }; | |
63 | ||
64 | enum { | |
65 | MLX5_CMD_DELIVERY_STAT_OK = 0x0, | |
66 | MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR = 0x1, | |
67 | MLX5_CMD_DELIVERY_STAT_TOK_ERR = 0x2, | |
68 | MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR = 0x3, | |
69 | MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR = 0x4, | |
70 | MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR = 0x5, | |
71 | MLX5_CMD_DELIVERY_STAT_FW_ERR = 0x6, | |
72 | MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR = 0x7, | |
73 | MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR = 0x8, | |
74 | MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR = 0x9, | |
75 | MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR = 0x10, | |
76 | }; | |
77 | ||
78 | enum { | |
79 | MLX5_CMD_STAT_OK = 0x0, | |
80 | MLX5_CMD_STAT_INT_ERR = 0x1, | |
81 | MLX5_CMD_STAT_BAD_OP_ERR = 0x2, | |
82 | MLX5_CMD_STAT_BAD_PARAM_ERR = 0x3, | |
83 | MLX5_CMD_STAT_BAD_SYS_STATE_ERR = 0x4, | |
84 | MLX5_CMD_STAT_BAD_RES_ERR = 0x5, | |
85 | MLX5_CMD_STAT_RES_BUSY = 0x6, | |
86 | MLX5_CMD_STAT_LIM_ERR = 0x8, | |
87 | MLX5_CMD_STAT_BAD_RES_STATE_ERR = 0x9, | |
88 | MLX5_CMD_STAT_IX_ERR = 0xa, | |
89 | MLX5_CMD_STAT_NO_RES_ERR = 0xf, | |
90 | MLX5_CMD_STAT_BAD_INP_LEN_ERR = 0x50, | |
91 | MLX5_CMD_STAT_BAD_OUTP_LEN_ERR = 0x51, | |
92 | MLX5_CMD_STAT_BAD_QP_STATE_ERR = 0x10, | |
93 | MLX5_CMD_STAT_BAD_PKT_ERR = 0x30, | |
94 | MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR = 0x40, | |
95 | }; | |
96 | ||
97 | static struct mlx5_cmd_work_ent *alloc_cmd(struct mlx5_cmd *cmd, | |
98 | struct mlx5_cmd_msg *in, | |
99 | struct mlx5_cmd_msg *out, | |
746b5583 | 100 | void *uout, int uout_size, |
e126ba97 EC |
101 | mlx5_cmd_cbk_t cbk, |
102 | void *context, int page_queue) | |
103 | { | |
104 | gfp_t alloc_flags = cbk ? GFP_ATOMIC : GFP_KERNEL; | |
105 | struct mlx5_cmd_work_ent *ent; | |
106 | ||
107 | ent = kzalloc(sizeof(*ent), alloc_flags); | |
108 | if (!ent) | |
109 | return ERR_PTR(-ENOMEM); | |
110 | ||
111 | ent->in = in; | |
112 | ent->out = out; | |
746b5583 EC |
113 | ent->uout = uout; |
114 | ent->uout_size = uout_size; | |
e126ba97 EC |
115 | ent->callback = cbk; |
116 | ent->context = context; | |
117 | ent->cmd = cmd; | |
118 | ent->page_queue = page_queue; | |
119 | ||
120 | return ent; | |
121 | } | |
122 | ||
123 | static u8 alloc_token(struct mlx5_cmd *cmd) | |
124 | { | |
125 | u8 token; | |
126 | ||
127 | spin_lock(&cmd->token_lock); | |
128 | token = cmd->token++ % 255 + 1; | |
129 | spin_unlock(&cmd->token_lock); | |
130 | ||
131 | return token; | |
132 | } | |
133 | ||
134 | static int alloc_ent(struct mlx5_cmd *cmd) | |
135 | { | |
136 | unsigned long flags; | |
137 | int ret; | |
138 | ||
139 | spin_lock_irqsave(&cmd->alloc_lock, flags); | |
140 | ret = find_first_bit(&cmd->bitmask, cmd->max_reg_cmds); | |
141 | if (ret < cmd->max_reg_cmds) | |
142 | clear_bit(ret, &cmd->bitmask); | |
143 | spin_unlock_irqrestore(&cmd->alloc_lock, flags); | |
144 | ||
145 | return ret < cmd->max_reg_cmds ? ret : -ENOMEM; | |
146 | } | |
147 | ||
148 | static void free_ent(struct mlx5_cmd *cmd, int idx) | |
149 | { | |
150 | unsigned long flags; | |
151 | ||
152 | spin_lock_irqsave(&cmd->alloc_lock, flags); | |
153 | set_bit(idx, &cmd->bitmask); | |
154 | spin_unlock_irqrestore(&cmd->alloc_lock, flags); | |
155 | } | |
156 | ||
157 | static struct mlx5_cmd_layout *get_inst(struct mlx5_cmd *cmd, int idx) | |
158 | { | |
159 | return cmd->cmd_buf + (idx << cmd->log_stride); | |
160 | } | |
161 | ||
162 | static u8 xor8_buf(void *buf, int len) | |
163 | { | |
164 | u8 *ptr = buf; | |
165 | u8 sum = 0; | |
166 | int i; | |
167 | ||
168 | for (i = 0; i < len; i++) | |
169 | sum ^= ptr[i]; | |
170 | ||
171 | return sum; | |
172 | } | |
173 | ||
174 | static int verify_block_sig(struct mlx5_cmd_prot_block *block) | |
175 | { | |
176 | if (xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 1) != 0xff) | |
177 | return -EINVAL; | |
178 | ||
179 | if (xor8_buf(block, sizeof(*block)) != 0xff) | |
180 | return -EINVAL; | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
c1868b82 EC |
185 | static void calc_block_sig(struct mlx5_cmd_prot_block *block, u8 token, |
186 | int csum) | |
e126ba97 EC |
187 | { |
188 | block->token = token; | |
c1868b82 EC |
189 | if (csum) { |
190 | block->ctrl_sig = ~xor8_buf(block->rsvd0, sizeof(*block) - | |
191 | sizeof(block->data) - 2); | |
192 | block->sig = ~xor8_buf(block, sizeof(*block) - 1); | |
193 | } | |
e126ba97 EC |
194 | } |
195 | ||
c1868b82 | 196 | static void calc_chain_sig(struct mlx5_cmd_msg *msg, u8 token, int csum) |
e126ba97 EC |
197 | { |
198 | struct mlx5_cmd_mailbox *next = msg->next; | |
199 | ||
200 | while (next) { | |
c1868b82 | 201 | calc_block_sig(next->buf, token, csum); |
e126ba97 EC |
202 | next = next->next; |
203 | } | |
204 | } | |
205 | ||
c1868b82 | 206 | static void set_signature(struct mlx5_cmd_work_ent *ent, int csum) |
e126ba97 EC |
207 | { |
208 | ent->lay->sig = ~xor8_buf(ent->lay, sizeof(*ent->lay)); | |
c1868b82 EC |
209 | calc_chain_sig(ent->in, ent->token, csum); |
210 | calc_chain_sig(ent->out, ent->token, csum); | |
e126ba97 EC |
211 | } |
212 | ||
213 | static void poll_timeout(struct mlx5_cmd_work_ent *ent) | |
214 | { | |
215 | unsigned long poll_end = jiffies + msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC + 1000); | |
216 | u8 own; | |
217 | ||
218 | do { | |
219 | own = ent->lay->status_own; | |
220 | if (!(own & CMD_OWNER_HW)) { | |
221 | ent->ret = 0; | |
222 | return; | |
223 | } | |
224 | usleep_range(5000, 10000); | |
225 | } while (time_before(jiffies, poll_end)); | |
226 | ||
227 | ent->ret = -ETIMEDOUT; | |
228 | } | |
229 | ||
230 | static void free_cmd(struct mlx5_cmd_work_ent *ent) | |
231 | { | |
232 | kfree(ent); | |
233 | } | |
234 | ||
235 | ||
236 | static int verify_signature(struct mlx5_cmd_work_ent *ent) | |
237 | { | |
238 | struct mlx5_cmd_mailbox *next = ent->out->next; | |
239 | int err; | |
240 | u8 sig; | |
241 | ||
242 | sig = xor8_buf(ent->lay, sizeof(*ent->lay)); | |
243 | if (sig != 0xff) | |
244 | return -EINVAL; | |
245 | ||
246 | while (next) { | |
247 | err = verify_block_sig(next->buf); | |
248 | if (err) | |
249 | return err; | |
250 | ||
251 | next = next->next; | |
252 | } | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | static void dump_buf(void *buf, int size, int data_only, int offset) | |
258 | { | |
259 | __be32 *p = buf; | |
260 | int i; | |
261 | ||
262 | for (i = 0; i < size; i += 16) { | |
263 | pr_debug("%03x: %08x %08x %08x %08x\n", offset, be32_to_cpu(p[0]), | |
264 | be32_to_cpu(p[1]), be32_to_cpu(p[2]), | |
265 | be32_to_cpu(p[3])); | |
266 | p += 4; | |
267 | offset += 16; | |
268 | } | |
269 | if (!data_only) | |
270 | pr_debug("\n"); | |
271 | } | |
272 | ||
273 | const char *mlx5_command_str(int command) | |
274 | { | |
275 | switch (command) { | |
276 | case MLX5_CMD_OP_QUERY_HCA_CAP: | |
277 | return "QUERY_HCA_CAP"; | |
278 | ||
279 | case MLX5_CMD_OP_SET_HCA_CAP: | |
280 | return "SET_HCA_CAP"; | |
281 | ||
282 | case MLX5_CMD_OP_QUERY_ADAPTER: | |
283 | return "QUERY_ADAPTER"; | |
284 | ||
285 | case MLX5_CMD_OP_INIT_HCA: | |
286 | return "INIT_HCA"; | |
287 | ||
288 | case MLX5_CMD_OP_TEARDOWN_HCA: | |
289 | return "TEARDOWN_HCA"; | |
290 | ||
cd23b14b EC |
291 | case MLX5_CMD_OP_ENABLE_HCA: |
292 | return "MLX5_CMD_OP_ENABLE_HCA"; | |
293 | ||
294 | case MLX5_CMD_OP_DISABLE_HCA: | |
295 | return "MLX5_CMD_OP_DISABLE_HCA"; | |
296 | ||
e126ba97 EC |
297 | case MLX5_CMD_OP_QUERY_PAGES: |
298 | return "QUERY_PAGES"; | |
299 | ||
300 | case MLX5_CMD_OP_MANAGE_PAGES: | |
301 | return "MANAGE_PAGES"; | |
302 | ||
303 | case MLX5_CMD_OP_CREATE_MKEY: | |
304 | return "CREATE_MKEY"; | |
305 | ||
306 | case MLX5_CMD_OP_QUERY_MKEY: | |
307 | return "QUERY_MKEY"; | |
308 | ||
309 | case MLX5_CMD_OP_DESTROY_MKEY: | |
310 | return "DESTROY_MKEY"; | |
311 | ||
312 | case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS: | |
313 | return "QUERY_SPECIAL_CONTEXTS"; | |
314 | ||
315 | case MLX5_CMD_OP_CREATE_EQ: | |
316 | return "CREATE_EQ"; | |
317 | ||
318 | case MLX5_CMD_OP_DESTROY_EQ: | |
319 | return "DESTROY_EQ"; | |
320 | ||
321 | case MLX5_CMD_OP_QUERY_EQ: | |
322 | return "QUERY_EQ"; | |
323 | ||
324 | case MLX5_CMD_OP_CREATE_CQ: | |
325 | return "CREATE_CQ"; | |
326 | ||
327 | case MLX5_CMD_OP_DESTROY_CQ: | |
328 | return "DESTROY_CQ"; | |
329 | ||
330 | case MLX5_CMD_OP_QUERY_CQ: | |
331 | return "QUERY_CQ"; | |
332 | ||
333 | case MLX5_CMD_OP_MODIFY_CQ: | |
334 | return "MODIFY_CQ"; | |
335 | ||
336 | case MLX5_CMD_OP_CREATE_QP: | |
337 | return "CREATE_QP"; | |
338 | ||
339 | case MLX5_CMD_OP_DESTROY_QP: | |
340 | return "DESTROY_QP"; | |
341 | ||
342 | case MLX5_CMD_OP_RST2INIT_QP: | |
343 | return "RST2INIT_QP"; | |
344 | ||
345 | case MLX5_CMD_OP_INIT2RTR_QP: | |
346 | return "INIT2RTR_QP"; | |
347 | ||
348 | case MLX5_CMD_OP_RTR2RTS_QP: | |
349 | return "RTR2RTS_QP"; | |
350 | ||
351 | case MLX5_CMD_OP_RTS2RTS_QP: | |
352 | return "RTS2RTS_QP"; | |
353 | ||
354 | case MLX5_CMD_OP_SQERR2RTS_QP: | |
355 | return "SQERR2RTS_QP"; | |
356 | ||
357 | case MLX5_CMD_OP_2ERR_QP: | |
358 | return "2ERR_QP"; | |
359 | ||
360 | case MLX5_CMD_OP_RTS2SQD_QP: | |
361 | return "RTS2SQD_QP"; | |
362 | ||
363 | case MLX5_CMD_OP_SQD2RTS_QP: | |
364 | return "SQD2RTS_QP"; | |
365 | ||
366 | case MLX5_CMD_OP_2RST_QP: | |
367 | return "2RST_QP"; | |
368 | ||
369 | case MLX5_CMD_OP_QUERY_QP: | |
370 | return "QUERY_QP"; | |
371 | ||
372 | case MLX5_CMD_OP_CONF_SQP: | |
373 | return "CONF_SQP"; | |
374 | ||
375 | case MLX5_CMD_OP_MAD_IFC: | |
376 | return "MAD_IFC"; | |
377 | ||
378 | case MLX5_CMD_OP_INIT2INIT_QP: | |
379 | return "INIT2INIT_QP"; | |
380 | ||
381 | case MLX5_CMD_OP_SUSPEND_QP: | |
382 | return "SUSPEND_QP"; | |
383 | ||
384 | case MLX5_CMD_OP_UNSUSPEND_QP: | |
385 | return "UNSUSPEND_QP"; | |
386 | ||
387 | case MLX5_CMD_OP_SQD2SQD_QP: | |
388 | return "SQD2SQD_QP"; | |
389 | ||
390 | case MLX5_CMD_OP_ALLOC_QP_COUNTER_SET: | |
391 | return "ALLOC_QP_COUNTER_SET"; | |
392 | ||
393 | case MLX5_CMD_OP_DEALLOC_QP_COUNTER_SET: | |
394 | return "DEALLOC_QP_COUNTER_SET"; | |
395 | ||
396 | case MLX5_CMD_OP_QUERY_QP_COUNTER_SET: | |
397 | return "QUERY_QP_COUNTER_SET"; | |
398 | ||
399 | case MLX5_CMD_OP_CREATE_PSV: | |
400 | return "CREATE_PSV"; | |
401 | ||
402 | case MLX5_CMD_OP_DESTROY_PSV: | |
403 | return "DESTROY_PSV"; | |
404 | ||
405 | case MLX5_CMD_OP_QUERY_PSV: | |
406 | return "QUERY_PSV"; | |
407 | ||
408 | case MLX5_CMD_OP_QUERY_SIG_RULE_TABLE: | |
409 | return "QUERY_SIG_RULE_TABLE"; | |
410 | ||
411 | case MLX5_CMD_OP_QUERY_BLOCK_SIZE_TABLE: | |
412 | return "QUERY_BLOCK_SIZE_TABLE"; | |
413 | ||
414 | case MLX5_CMD_OP_CREATE_SRQ: | |
415 | return "CREATE_SRQ"; | |
416 | ||
417 | case MLX5_CMD_OP_DESTROY_SRQ: | |
418 | return "DESTROY_SRQ"; | |
419 | ||
420 | case MLX5_CMD_OP_QUERY_SRQ: | |
421 | return "QUERY_SRQ"; | |
422 | ||
423 | case MLX5_CMD_OP_ARM_RQ: | |
424 | return "ARM_RQ"; | |
425 | ||
426 | case MLX5_CMD_OP_RESIZE_SRQ: | |
427 | return "RESIZE_SRQ"; | |
428 | ||
429 | case MLX5_CMD_OP_ALLOC_PD: | |
430 | return "ALLOC_PD"; | |
431 | ||
432 | case MLX5_CMD_OP_DEALLOC_PD: | |
433 | return "DEALLOC_PD"; | |
434 | ||
435 | case MLX5_CMD_OP_ALLOC_UAR: | |
436 | return "ALLOC_UAR"; | |
437 | ||
438 | case MLX5_CMD_OP_DEALLOC_UAR: | |
439 | return "DEALLOC_UAR"; | |
440 | ||
441 | case MLX5_CMD_OP_ATTACH_TO_MCG: | |
442 | return "ATTACH_TO_MCG"; | |
443 | ||
444 | case MLX5_CMD_OP_DETACH_FROM_MCG: | |
445 | return "DETACH_FROM_MCG"; | |
446 | ||
447 | case MLX5_CMD_OP_ALLOC_XRCD: | |
448 | return "ALLOC_XRCD"; | |
449 | ||
450 | case MLX5_CMD_OP_DEALLOC_XRCD: | |
451 | return "DEALLOC_XRCD"; | |
452 | ||
453 | case MLX5_CMD_OP_ACCESS_REG: | |
454 | return "MLX5_CMD_OP_ACCESS_REG"; | |
455 | ||
456 | default: return "unknown command opcode"; | |
457 | } | |
458 | } | |
459 | ||
460 | static void dump_command(struct mlx5_core_dev *dev, | |
461 | struct mlx5_cmd_work_ent *ent, int input) | |
462 | { | |
463 | u16 op = be16_to_cpu(((struct mlx5_inbox_hdr *)(ent->lay->in))->opcode); | |
464 | struct mlx5_cmd_msg *msg = input ? ent->in : ent->out; | |
465 | struct mlx5_cmd_mailbox *next = msg->next; | |
466 | int data_only; | |
f241e749 | 467 | u32 offset = 0; |
e126ba97 EC |
468 | int dump_len; |
469 | ||
470 | data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA)); | |
471 | ||
472 | if (data_only) | |
473 | mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA, | |
474 | "dump command data %s(0x%x) %s\n", | |
475 | mlx5_command_str(op), op, | |
476 | input ? "INPUT" : "OUTPUT"); | |
477 | else | |
478 | mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n", | |
479 | mlx5_command_str(op), op, | |
480 | input ? "INPUT" : "OUTPUT"); | |
481 | ||
482 | if (data_only) { | |
483 | if (input) { | |
484 | dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset); | |
485 | offset += sizeof(ent->lay->in); | |
486 | } else { | |
487 | dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset); | |
488 | offset += sizeof(ent->lay->out); | |
489 | } | |
490 | } else { | |
491 | dump_buf(ent->lay, sizeof(*ent->lay), 0, offset); | |
492 | offset += sizeof(*ent->lay); | |
493 | } | |
494 | ||
495 | while (next && offset < msg->len) { | |
496 | if (data_only) { | |
497 | dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset); | |
498 | dump_buf(next->buf, dump_len, 1, offset); | |
499 | offset += MLX5_CMD_DATA_BLOCK_SIZE; | |
500 | } else { | |
501 | mlx5_core_dbg(dev, "command block:\n"); | |
502 | dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset); | |
503 | offset += sizeof(struct mlx5_cmd_prot_block); | |
504 | } | |
505 | next = next->next; | |
506 | } | |
507 | ||
508 | if (data_only) | |
509 | pr_debug("\n"); | |
510 | } | |
511 | ||
512 | static void cmd_work_handler(struct work_struct *work) | |
513 | { | |
514 | struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work); | |
515 | struct mlx5_cmd *cmd = ent->cmd; | |
516 | struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev, cmd); | |
517 | struct mlx5_cmd_layout *lay; | |
518 | struct semaphore *sem; | |
519 | ||
520 | sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem; | |
521 | down(sem); | |
522 | if (!ent->page_queue) { | |
523 | ent->idx = alloc_ent(cmd); | |
524 | if (ent->idx < 0) { | |
525 | mlx5_core_err(dev, "failed to allocate command entry\n"); | |
526 | up(sem); | |
527 | return; | |
528 | } | |
529 | } else { | |
530 | ent->idx = cmd->max_reg_cmds; | |
531 | } | |
532 | ||
533 | ent->token = alloc_token(cmd); | |
534 | cmd->ent_arr[ent->idx] = ent; | |
535 | lay = get_inst(cmd, ent->idx); | |
536 | ent->lay = lay; | |
537 | memset(lay, 0, sizeof(*lay)); | |
538 | memcpy(lay->in, ent->in->first.data, sizeof(lay->in)); | |
746b5583 | 539 | ent->op = be32_to_cpu(lay->in[0]) >> 16; |
e126ba97 EC |
540 | if (ent->in->next) |
541 | lay->in_ptr = cpu_to_be64(ent->in->next->dma); | |
542 | lay->inlen = cpu_to_be32(ent->in->len); | |
543 | if (ent->out->next) | |
544 | lay->out_ptr = cpu_to_be64(ent->out->next->dma); | |
545 | lay->outlen = cpu_to_be32(ent->out->len); | |
546 | lay->type = MLX5_PCI_CMD_XPORT; | |
547 | lay->token = ent->token; | |
548 | lay->status_own = CMD_OWNER_HW; | |
c1868b82 | 549 | set_signature(ent, !cmd->checksum_disabled); |
e126ba97 | 550 | dump_command(dev, ent, 1); |
14a70046 | 551 | ent->ts1 = ktime_get_ns(); |
e126ba97 EC |
552 | |
553 | /* ring doorbell after the descriptor is valid */ | |
554 | wmb(); | |
555 | iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell); | |
556 | mlx5_core_dbg(dev, "write 0x%x to command doorbell\n", 1 << ent->idx); | |
557 | mmiowb(); | |
558 | if (cmd->mode == CMD_MODE_POLLING) { | |
559 | poll_timeout(ent); | |
560 | /* make sure we read the descriptor after ownership is SW */ | |
561 | rmb(); | |
562 | mlx5_cmd_comp_handler(dev, 1UL << ent->idx); | |
563 | } | |
564 | } | |
565 | ||
566 | static const char *deliv_status_to_str(u8 status) | |
567 | { | |
568 | switch (status) { | |
569 | case MLX5_CMD_DELIVERY_STAT_OK: | |
570 | return "no errors"; | |
571 | case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR: | |
572 | return "signature error"; | |
573 | case MLX5_CMD_DELIVERY_STAT_TOK_ERR: | |
574 | return "token error"; | |
575 | case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR: | |
576 | return "bad block number"; | |
577 | case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR: | |
578 | return "output pointer not aligned to block size"; | |
579 | case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR: | |
580 | return "input pointer not aligned to block size"; | |
581 | case MLX5_CMD_DELIVERY_STAT_FW_ERR: | |
582 | return "firmware internal error"; | |
583 | case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR: | |
584 | return "command input length error"; | |
585 | case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR: | |
586 | return "command ouput length error"; | |
587 | case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR: | |
588 | return "reserved fields not cleared"; | |
589 | case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR: | |
590 | return "bad command descriptor type"; | |
591 | default: | |
592 | return "unknown status code"; | |
593 | } | |
594 | } | |
595 | ||
596 | static u16 msg_to_opcode(struct mlx5_cmd_msg *in) | |
597 | { | |
598 | struct mlx5_inbox_hdr *hdr = (struct mlx5_inbox_hdr *)(in->first.data); | |
599 | ||
600 | return be16_to_cpu(hdr->opcode); | |
601 | } | |
602 | ||
603 | static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent) | |
604 | { | |
605 | unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC); | |
606 | struct mlx5_cmd *cmd = &dev->cmd; | |
607 | int err; | |
608 | ||
609 | if (cmd->mode == CMD_MODE_POLLING) { | |
610 | wait_for_completion(&ent->done); | |
611 | err = ent->ret; | |
612 | } else { | |
613 | if (!wait_for_completion_timeout(&ent->done, timeout)) | |
614 | err = -ETIMEDOUT; | |
615 | else | |
616 | err = 0; | |
617 | } | |
618 | if (err == -ETIMEDOUT) { | |
619 | mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n", | |
620 | mlx5_command_str(msg_to_opcode(ent->in)), | |
621 | msg_to_opcode(ent->in)); | |
622 | } | |
1a91de28 JP |
623 | mlx5_core_dbg(dev, "err %d, delivery status %s(%d)\n", |
624 | err, deliv_status_to_str(ent->status), ent->status); | |
e126ba97 EC |
625 | |
626 | return err; | |
627 | } | |
628 | ||
629 | /* Notes: | |
630 | * 1. Callback functions may not sleep | |
631 | * 2. page queue commands do not support asynchrous completion | |
632 | */ | |
633 | static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in, | |
746b5583 EC |
634 | struct mlx5_cmd_msg *out, void *uout, int uout_size, |
635 | mlx5_cmd_cbk_t callback, | |
e126ba97 EC |
636 | void *context, int page_queue, u8 *status) |
637 | { | |
638 | struct mlx5_cmd *cmd = &dev->cmd; | |
639 | struct mlx5_cmd_work_ent *ent; | |
e126ba97 EC |
640 | struct mlx5_cmd_stats *stats; |
641 | int err = 0; | |
642 | s64 ds; | |
643 | u16 op; | |
644 | ||
645 | if (callback && page_queue) | |
646 | return -EINVAL; | |
647 | ||
746b5583 EC |
648 | ent = alloc_cmd(cmd, in, out, uout, uout_size, callback, context, |
649 | page_queue); | |
e126ba97 EC |
650 | if (IS_ERR(ent)) |
651 | return PTR_ERR(ent); | |
652 | ||
653 | if (!callback) | |
654 | init_completion(&ent->done); | |
655 | ||
656 | INIT_WORK(&ent->work, cmd_work_handler); | |
657 | if (page_queue) { | |
658 | cmd_work_handler(&ent->work); | |
659 | } else if (!queue_work(cmd->wq, &ent->work)) { | |
660 | mlx5_core_warn(dev, "failed to queue work\n"); | |
661 | err = -ENOMEM; | |
662 | goto out_free; | |
663 | } | |
664 | ||
665 | if (!callback) { | |
666 | err = wait_func(dev, ent); | |
667 | if (err == -ETIMEDOUT) | |
668 | goto out; | |
669 | ||
14a70046 | 670 | ds = ent->ts2 - ent->ts1; |
e126ba97 EC |
671 | op = be16_to_cpu(((struct mlx5_inbox_hdr *)in->first.data)->opcode); |
672 | if (op < ARRAY_SIZE(cmd->stats)) { | |
673 | stats = &cmd->stats[op]; | |
746b5583 | 674 | spin_lock_irq(&stats->lock); |
e126ba97 EC |
675 | stats->sum += ds; |
676 | ++stats->n; | |
746b5583 | 677 | spin_unlock_irq(&stats->lock); |
e126ba97 EC |
678 | } |
679 | mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME, | |
680 | "fw exec time for %s is %lld nsec\n", | |
681 | mlx5_command_str(op), ds); | |
682 | *status = ent->status; | |
683 | free_cmd(ent); | |
684 | } | |
685 | ||
686 | return err; | |
687 | ||
688 | out_free: | |
689 | free_cmd(ent); | |
690 | out: | |
691 | return err; | |
692 | } | |
693 | ||
694 | static ssize_t dbg_write(struct file *filp, const char __user *buf, | |
695 | size_t count, loff_t *pos) | |
696 | { | |
697 | struct mlx5_core_dev *dev = filp->private_data; | |
698 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
699 | char lbuf[3]; | |
700 | int err; | |
701 | ||
702 | if (!dbg->in_msg || !dbg->out_msg) | |
703 | return -ENOMEM; | |
704 | ||
705 | if (copy_from_user(lbuf, buf, sizeof(lbuf))) | |
5e631a03 | 706 | return -EFAULT; |
e126ba97 EC |
707 | |
708 | lbuf[sizeof(lbuf) - 1] = 0; | |
709 | ||
710 | if (strcmp(lbuf, "go")) | |
711 | return -EINVAL; | |
712 | ||
713 | err = mlx5_cmd_exec(dev, dbg->in_msg, dbg->inlen, dbg->out_msg, dbg->outlen); | |
714 | ||
715 | return err ? err : count; | |
716 | } | |
717 | ||
718 | ||
719 | static const struct file_operations fops = { | |
720 | .owner = THIS_MODULE, | |
721 | .open = simple_open, | |
722 | .write = dbg_write, | |
723 | }; | |
724 | ||
725 | static int mlx5_copy_to_msg(struct mlx5_cmd_msg *to, void *from, int size) | |
726 | { | |
727 | struct mlx5_cmd_prot_block *block; | |
728 | struct mlx5_cmd_mailbox *next; | |
729 | int copy; | |
730 | ||
731 | if (!to || !from) | |
732 | return -ENOMEM; | |
733 | ||
734 | copy = min_t(int, size, sizeof(to->first.data)); | |
735 | memcpy(to->first.data, from, copy); | |
736 | size -= copy; | |
737 | from += copy; | |
738 | ||
739 | next = to->next; | |
740 | while (size) { | |
741 | if (!next) { | |
742 | /* this is a BUG */ | |
743 | return -ENOMEM; | |
744 | } | |
745 | ||
746 | copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); | |
747 | block = next->buf; | |
748 | memcpy(block->data, from, copy); | |
749 | from += copy; | |
750 | size -= copy; | |
751 | next = next->next; | |
752 | } | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
757 | static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size) | |
758 | { | |
759 | struct mlx5_cmd_prot_block *block; | |
760 | struct mlx5_cmd_mailbox *next; | |
761 | int copy; | |
762 | ||
763 | if (!to || !from) | |
764 | return -ENOMEM; | |
765 | ||
766 | copy = min_t(int, size, sizeof(from->first.data)); | |
767 | memcpy(to, from->first.data, copy); | |
768 | size -= copy; | |
769 | to += copy; | |
770 | ||
771 | next = from->next; | |
772 | while (size) { | |
773 | if (!next) { | |
774 | /* this is a BUG */ | |
775 | return -ENOMEM; | |
776 | } | |
777 | ||
778 | copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); | |
779 | block = next->buf; | |
e126ba97 EC |
780 | |
781 | memcpy(to, block->data, copy); | |
782 | to += copy; | |
783 | size -= copy; | |
784 | next = next->next; | |
785 | } | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
790 | static struct mlx5_cmd_mailbox *alloc_cmd_box(struct mlx5_core_dev *dev, | |
791 | gfp_t flags) | |
792 | { | |
793 | struct mlx5_cmd_mailbox *mailbox; | |
794 | ||
795 | mailbox = kmalloc(sizeof(*mailbox), flags); | |
796 | if (!mailbox) | |
797 | return ERR_PTR(-ENOMEM); | |
798 | ||
799 | mailbox->buf = pci_pool_alloc(dev->cmd.pool, flags, | |
800 | &mailbox->dma); | |
801 | if (!mailbox->buf) { | |
802 | mlx5_core_dbg(dev, "failed allocation\n"); | |
803 | kfree(mailbox); | |
804 | return ERR_PTR(-ENOMEM); | |
805 | } | |
806 | memset(mailbox->buf, 0, sizeof(struct mlx5_cmd_prot_block)); | |
807 | mailbox->next = NULL; | |
808 | ||
809 | return mailbox; | |
810 | } | |
811 | ||
812 | static void free_cmd_box(struct mlx5_core_dev *dev, | |
813 | struct mlx5_cmd_mailbox *mailbox) | |
814 | { | |
815 | pci_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma); | |
816 | kfree(mailbox); | |
817 | } | |
818 | ||
819 | static struct mlx5_cmd_msg *mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev, | |
820 | gfp_t flags, int size) | |
821 | { | |
822 | struct mlx5_cmd_mailbox *tmp, *head = NULL; | |
823 | struct mlx5_cmd_prot_block *block; | |
824 | struct mlx5_cmd_msg *msg; | |
825 | int blen; | |
826 | int err; | |
827 | int n; | |
828 | int i; | |
829 | ||
746b5583 | 830 | msg = kzalloc(sizeof(*msg), flags); |
e126ba97 EC |
831 | if (!msg) |
832 | return ERR_PTR(-ENOMEM); | |
833 | ||
834 | blen = size - min_t(int, sizeof(msg->first.data), size); | |
835 | n = (blen + MLX5_CMD_DATA_BLOCK_SIZE - 1) / MLX5_CMD_DATA_BLOCK_SIZE; | |
836 | ||
837 | for (i = 0; i < n; i++) { | |
838 | tmp = alloc_cmd_box(dev, flags); | |
839 | if (IS_ERR(tmp)) { | |
840 | mlx5_core_warn(dev, "failed allocating block\n"); | |
841 | err = PTR_ERR(tmp); | |
842 | goto err_alloc; | |
843 | } | |
844 | ||
845 | block = tmp->buf; | |
846 | tmp->next = head; | |
847 | block->next = cpu_to_be64(tmp->next ? tmp->next->dma : 0); | |
848 | block->block_num = cpu_to_be32(n - i - 1); | |
849 | head = tmp; | |
850 | } | |
851 | msg->next = head; | |
852 | msg->len = size; | |
853 | return msg; | |
854 | ||
855 | err_alloc: | |
856 | while (head) { | |
857 | tmp = head->next; | |
858 | free_cmd_box(dev, head); | |
859 | head = tmp; | |
860 | } | |
861 | kfree(msg); | |
862 | ||
863 | return ERR_PTR(err); | |
864 | } | |
865 | ||
866 | static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev, | |
867 | struct mlx5_cmd_msg *msg) | |
868 | { | |
869 | struct mlx5_cmd_mailbox *head = msg->next; | |
870 | struct mlx5_cmd_mailbox *next; | |
871 | ||
872 | while (head) { | |
873 | next = head->next; | |
874 | free_cmd_box(dev, head); | |
875 | head = next; | |
876 | } | |
877 | kfree(msg); | |
878 | } | |
879 | ||
880 | static ssize_t data_write(struct file *filp, const char __user *buf, | |
881 | size_t count, loff_t *pos) | |
882 | { | |
883 | struct mlx5_core_dev *dev = filp->private_data; | |
884 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
885 | void *ptr; | |
886 | int err; | |
887 | ||
888 | if (*pos != 0) | |
889 | return -EINVAL; | |
890 | ||
891 | kfree(dbg->in_msg); | |
892 | dbg->in_msg = NULL; | |
893 | dbg->inlen = 0; | |
894 | ||
895 | ptr = kzalloc(count, GFP_KERNEL); | |
896 | if (!ptr) | |
897 | return -ENOMEM; | |
898 | ||
899 | if (copy_from_user(ptr, buf, count)) { | |
5e631a03 | 900 | err = -EFAULT; |
e126ba97 EC |
901 | goto out; |
902 | } | |
903 | dbg->in_msg = ptr; | |
904 | dbg->inlen = count; | |
905 | ||
906 | *pos = count; | |
907 | ||
908 | return count; | |
909 | ||
910 | out: | |
911 | kfree(ptr); | |
912 | return err; | |
913 | } | |
914 | ||
915 | static ssize_t data_read(struct file *filp, char __user *buf, size_t count, | |
916 | loff_t *pos) | |
917 | { | |
918 | struct mlx5_core_dev *dev = filp->private_data; | |
919 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
920 | int copy; | |
921 | ||
922 | if (*pos) | |
923 | return 0; | |
924 | ||
925 | if (!dbg->out_msg) | |
926 | return -ENOMEM; | |
927 | ||
928 | copy = min_t(int, count, dbg->outlen); | |
929 | if (copy_to_user(buf, dbg->out_msg, copy)) | |
5e631a03 | 930 | return -EFAULT; |
e126ba97 EC |
931 | |
932 | *pos += copy; | |
933 | ||
934 | return copy; | |
935 | } | |
936 | ||
937 | static const struct file_operations dfops = { | |
938 | .owner = THIS_MODULE, | |
939 | .open = simple_open, | |
940 | .write = data_write, | |
941 | .read = data_read, | |
942 | }; | |
943 | ||
944 | static ssize_t outlen_read(struct file *filp, char __user *buf, size_t count, | |
945 | loff_t *pos) | |
946 | { | |
947 | struct mlx5_core_dev *dev = filp->private_data; | |
948 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
949 | char outlen[8]; | |
950 | int err; | |
951 | ||
952 | if (*pos) | |
953 | return 0; | |
954 | ||
955 | err = snprintf(outlen, sizeof(outlen), "%d", dbg->outlen); | |
956 | if (err < 0) | |
957 | return err; | |
958 | ||
959 | if (copy_to_user(buf, &outlen, err)) | |
5e631a03 | 960 | return -EFAULT; |
e126ba97 EC |
961 | |
962 | *pos += err; | |
963 | ||
964 | return err; | |
965 | } | |
966 | ||
967 | static ssize_t outlen_write(struct file *filp, const char __user *buf, | |
968 | size_t count, loff_t *pos) | |
969 | { | |
970 | struct mlx5_core_dev *dev = filp->private_data; | |
971 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
972 | char outlen_str[8]; | |
973 | int outlen; | |
974 | void *ptr; | |
975 | int err; | |
976 | ||
977 | if (*pos != 0 || count > 6) | |
978 | return -EINVAL; | |
979 | ||
980 | kfree(dbg->out_msg); | |
981 | dbg->out_msg = NULL; | |
982 | dbg->outlen = 0; | |
983 | ||
984 | if (copy_from_user(outlen_str, buf, count)) | |
5e631a03 | 985 | return -EFAULT; |
e126ba97 EC |
986 | |
987 | outlen_str[7] = 0; | |
988 | ||
989 | err = sscanf(outlen_str, "%d", &outlen); | |
990 | if (err < 0) | |
991 | return err; | |
992 | ||
993 | ptr = kzalloc(outlen, GFP_KERNEL); | |
994 | if (!ptr) | |
995 | return -ENOMEM; | |
996 | ||
997 | dbg->out_msg = ptr; | |
998 | dbg->outlen = outlen; | |
999 | ||
1000 | *pos = count; | |
1001 | ||
1002 | return count; | |
1003 | } | |
1004 | ||
1005 | static const struct file_operations olfops = { | |
1006 | .owner = THIS_MODULE, | |
1007 | .open = simple_open, | |
1008 | .write = outlen_write, | |
1009 | .read = outlen_read, | |
1010 | }; | |
1011 | ||
1012 | static void set_wqname(struct mlx5_core_dev *dev) | |
1013 | { | |
1014 | struct mlx5_cmd *cmd = &dev->cmd; | |
1015 | ||
1016 | snprintf(cmd->wq_name, sizeof(cmd->wq_name), "mlx5_cmd_%s", | |
1017 | dev_name(&dev->pdev->dev)); | |
1018 | } | |
1019 | ||
1020 | static void clean_debug_files(struct mlx5_core_dev *dev) | |
1021 | { | |
1022 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
1023 | ||
1024 | if (!mlx5_debugfs_root) | |
1025 | return; | |
1026 | ||
1027 | mlx5_cmdif_debugfs_cleanup(dev); | |
1028 | debugfs_remove_recursive(dbg->dbg_root); | |
1029 | } | |
1030 | ||
1031 | static int create_debugfs_files(struct mlx5_core_dev *dev) | |
1032 | { | |
1033 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
1034 | int err = -ENOMEM; | |
1035 | ||
1036 | if (!mlx5_debugfs_root) | |
1037 | return 0; | |
1038 | ||
1039 | dbg->dbg_root = debugfs_create_dir("cmd", dev->priv.dbg_root); | |
1040 | if (!dbg->dbg_root) | |
1041 | return err; | |
1042 | ||
1043 | dbg->dbg_in = debugfs_create_file("in", 0400, dbg->dbg_root, | |
1044 | dev, &dfops); | |
1045 | if (!dbg->dbg_in) | |
1046 | goto err_dbg; | |
1047 | ||
1048 | dbg->dbg_out = debugfs_create_file("out", 0200, dbg->dbg_root, | |
1049 | dev, &dfops); | |
1050 | if (!dbg->dbg_out) | |
1051 | goto err_dbg; | |
1052 | ||
1053 | dbg->dbg_outlen = debugfs_create_file("out_len", 0600, dbg->dbg_root, | |
1054 | dev, &olfops); | |
1055 | if (!dbg->dbg_outlen) | |
1056 | goto err_dbg; | |
1057 | ||
1058 | dbg->dbg_status = debugfs_create_u8("status", 0600, dbg->dbg_root, | |
1059 | &dbg->status); | |
1060 | if (!dbg->dbg_status) | |
1061 | goto err_dbg; | |
1062 | ||
1063 | dbg->dbg_run = debugfs_create_file("run", 0200, dbg->dbg_root, dev, &fops); | |
1064 | if (!dbg->dbg_run) | |
1065 | goto err_dbg; | |
1066 | ||
1067 | mlx5_cmdif_debugfs_init(dev); | |
1068 | ||
1069 | return 0; | |
1070 | ||
1071 | err_dbg: | |
1072 | clean_debug_files(dev); | |
1073 | return err; | |
1074 | } | |
1075 | ||
1076 | void mlx5_cmd_use_events(struct mlx5_core_dev *dev) | |
1077 | { | |
1078 | struct mlx5_cmd *cmd = &dev->cmd; | |
1079 | int i; | |
1080 | ||
1081 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1082 | down(&cmd->sem); | |
1083 | ||
1084 | down(&cmd->pages_sem); | |
1085 | ||
1086 | flush_workqueue(cmd->wq); | |
1087 | ||
1088 | cmd->mode = CMD_MODE_EVENTS; | |
1089 | ||
1090 | up(&cmd->pages_sem); | |
1091 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1092 | up(&cmd->sem); | |
1093 | } | |
1094 | ||
1095 | void mlx5_cmd_use_polling(struct mlx5_core_dev *dev) | |
1096 | { | |
1097 | struct mlx5_cmd *cmd = &dev->cmd; | |
1098 | int i; | |
1099 | ||
1100 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1101 | down(&cmd->sem); | |
1102 | ||
1103 | down(&cmd->pages_sem); | |
1104 | ||
1105 | flush_workqueue(cmd->wq); | |
1106 | cmd->mode = CMD_MODE_POLLING; | |
1107 | ||
1108 | up(&cmd->pages_sem); | |
1109 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1110 | up(&cmd->sem); | |
1111 | } | |
1112 | ||
746b5583 EC |
1113 | static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg) |
1114 | { | |
1115 | unsigned long flags; | |
1116 | ||
1117 | if (msg->cache) { | |
1118 | spin_lock_irqsave(&msg->cache->lock, flags); | |
1119 | list_add_tail(&msg->list, &msg->cache->head); | |
1120 | spin_unlock_irqrestore(&msg->cache->lock, flags); | |
1121 | } else { | |
1122 | mlx5_free_cmd_msg(dev, msg); | |
1123 | } | |
1124 | } | |
1125 | ||
e126ba97 EC |
1126 | void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, unsigned long vector) |
1127 | { | |
1128 | struct mlx5_cmd *cmd = &dev->cmd; | |
1129 | struct mlx5_cmd_work_ent *ent; | |
1130 | mlx5_cmd_cbk_t callback; | |
1131 | void *context; | |
1132 | int err; | |
1133 | int i; | |
746b5583 EC |
1134 | s64 ds; |
1135 | struct mlx5_cmd_stats *stats; | |
1136 | unsigned long flags; | |
e126ba97 EC |
1137 | |
1138 | for (i = 0; i < (1 << cmd->log_sz); i++) { | |
1139 | if (test_bit(i, &vector)) { | |
11940c87 DC |
1140 | struct semaphore *sem; |
1141 | ||
e126ba97 | 1142 | ent = cmd->ent_arr[i]; |
11940c87 DC |
1143 | if (ent->page_queue) |
1144 | sem = &cmd->pages_sem; | |
1145 | else | |
1146 | sem = &cmd->sem; | |
14a70046 | 1147 | ent->ts2 = ktime_get_ns(); |
e126ba97 EC |
1148 | memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out)); |
1149 | dump_command(dev, ent, 0); | |
1150 | if (!ent->ret) { | |
1151 | if (!cmd->checksum_disabled) | |
1152 | ent->ret = verify_signature(ent); | |
1153 | else | |
1154 | ent->ret = 0; | |
1155 | ent->status = ent->lay->status_own >> 1; | |
1156 | mlx5_core_dbg(dev, "command completed. ret 0x%x, delivery status %s(0x%x)\n", | |
1157 | ent->ret, deliv_status_to_str(ent->status), ent->status); | |
1158 | } | |
1159 | free_ent(cmd, ent->idx); | |
1160 | if (ent->callback) { | |
14a70046 | 1161 | ds = ent->ts2 - ent->ts1; |
746b5583 EC |
1162 | if (ent->op < ARRAY_SIZE(cmd->stats)) { |
1163 | stats = &cmd->stats[ent->op]; | |
1164 | spin_lock_irqsave(&stats->lock, flags); | |
1165 | stats->sum += ds; | |
1166 | ++stats->n; | |
1167 | spin_unlock_irqrestore(&stats->lock, flags); | |
1168 | } | |
1169 | ||
e126ba97 EC |
1170 | callback = ent->callback; |
1171 | context = ent->context; | |
1172 | err = ent->ret; | |
746b5583 EC |
1173 | if (!err) |
1174 | err = mlx5_copy_from_msg(ent->uout, | |
1175 | ent->out, | |
1176 | ent->uout_size); | |
1177 | ||
1178 | mlx5_free_cmd_msg(dev, ent->out); | |
1179 | free_msg(dev, ent->in); | |
1180 | ||
e126ba97 EC |
1181 | free_cmd(ent); |
1182 | callback(err, context); | |
1183 | } else { | |
1184 | complete(&ent->done); | |
1185 | } | |
11940c87 | 1186 | up(sem); |
e126ba97 EC |
1187 | } |
1188 | } | |
1189 | } | |
1190 | EXPORT_SYMBOL(mlx5_cmd_comp_handler); | |
1191 | ||
1192 | static int status_to_err(u8 status) | |
1193 | { | |
1194 | return status ? -1 : 0; /* TBD more meaningful codes */ | |
1195 | } | |
1196 | ||
746b5583 EC |
1197 | static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size, |
1198 | gfp_t gfp) | |
e126ba97 EC |
1199 | { |
1200 | struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM); | |
1201 | struct mlx5_cmd *cmd = &dev->cmd; | |
1202 | struct cache_ent *ent = NULL; | |
1203 | ||
1204 | if (in_size > MED_LIST_SIZE && in_size <= LONG_LIST_SIZE) | |
1205 | ent = &cmd->cache.large; | |
1206 | else if (in_size > 16 && in_size <= MED_LIST_SIZE) | |
1207 | ent = &cmd->cache.med; | |
1208 | ||
1209 | if (ent) { | |
746b5583 | 1210 | spin_lock_irq(&ent->lock); |
e126ba97 EC |
1211 | if (!list_empty(&ent->head)) { |
1212 | msg = list_entry(ent->head.next, typeof(*msg), list); | |
1213 | /* For cached lists, we must explicitly state what is | |
1214 | * the real size | |
1215 | */ | |
1216 | msg->len = in_size; | |
1217 | list_del(&msg->list); | |
1218 | } | |
746b5583 | 1219 | spin_unlock_irq(&ent->lock); |
e126ba97 EC |
1220 | } |
1221 | ||
1222 | if (IS_ERR(msg)) | |
746b5583 | 1223 | msg = mlx5_alloc_cmd_msg(dev, gfp, in_size); |
e126ba97 EC |
1224 | |
1225 | return msg; | |
1226 | } | |
1227 | ||
e126ba97 EC |
1228 | static int is_manage_pages(struct mlx5_inbox_hdr *in) |
1229 | { | |
1230 | return be16_to_cpu(in->opcode) == MLX5_CMD_OP_MANAGE_PAGES; | |
1231 | } | |
1232 | ||
746b5583 EC |
1233 | static int cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out, |
1234 | int out_size, mlx5_cmd_cbk_t callback, void *context) | |
e126ba97 EC |
1235 | { |
1236 | struct mlx5_cmd_msg *inb; | |
1237 | struct mlx5_cmd_msg *outb; | |
1238 | int pages_queue; | |
746b5583 | 1239 | gfp_t gfp; |
e126ba97 EC |
1240 | int err; |
1241 | u8 status = 0; | |
1242 | ||
1243 | pages_queue = is_manage_pages(in); | |
746b5583 | 1244 | gfp = callback ? GFP_ATOMIC : GFP_KERNEL; |
e126ba97 | 1245 | |
746b5583 | 1246 | inb = alloc_msg(dev, in_size, gfp); |
e126ba97 EC |
1247 | if (IS_ERR(inb)) { |
1248 | err = PTR_ERR(inb); | |
1249 | return err; | |
1250 | } | |
1251 | ||
1252 | err = mlx5_copy_to_msg(inb, in, in_size); | |
1253 | if (err) { | |
1254 | mlx5_core_warn(dev, "err %d\n", err); | |
1255 | goto out_in; | |
1256 | } | |
1257 | ||
746b5583 | 1258 | outb = mlx5_alloc_cmd_msg(dev, gfp, out_size); |
e126ba97 EC |
1259 | if (IS_ERR(outb)) { |
1260 | err = PTR_ERR(outb); | |
1261 | goto out_in; | |
1262 | } | |
1263 | ||
746b5583 EC |
1264 | err = mlx5_cmd_invoke(dev, inb, outb, out, out_size, callback, context, |
1265 | pages_queue, &status); | |
e126ba97 EC |
1266 | if (err) |
1267 | goto out_out; | |
1268 | ||
1269 | mlx5_core_dbg(dev, "err %d, status %d\n", err, status); | |
1270 | if (status) { | |
1271 | err = status_to_err(status); | |
1272 | goto out_out; | |
1273 | } | |
1274 | ||
1275 | err = mlx5_copy_from_msg(out, outb, out_size); | |
1276 | ||
1277 | out_out: | |
746b5583 EC |
1278 | if (!callback) |
1279 | mlx5_free_cmd_msg(dev, outb); | |
e126ba97 EC |
1280 | |
1281 | out_in: | |
746b5583 EC |
1282 | if (!callback) |
1283 | free_msg(dev, inb); | |
e126ba97 EC |
1284 | return err; |
1285 | } | |
746b5583 EC |
1286 | |
1287 | int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out, | |
1288 | int out_size) | |
1289 | { | |
1290 | return cmd_exec(dev, in, in_size, out, out_size, NULL, NULL); | |
1291 | } | |
e126ba97 EC |
1292 | EXPORT_SYMBOL(mlx5_cmd_exec); |
1293 | ||
746b5583 EC |
1294 | int mlx5_cmd_exec_cb(struct mlx5_core_dev *dev, void *in, int in_size, |
1295 | void *out, int out_size, mlx5_cmd_cbk_t callback, | |
1296 | void *context) | |
1297 | { | |
1298 | return cmd_exec(dev, in, in_size, out, out_size, callback, context); | |
1299 | } | |
1300 | EXPORT_SYMBOL(mlx5_cmd_exec_cb); | |
1301 | ||
e126ba97 EC |
1302 | static void destroy_msg_cache(struct mlx5_core_dev *dev) |
1303 | { | |
1304 | struct mlx5_cmd *cmd = &dev->cmd; | |
1305 | struct mlx5_cmd_msg *msg; | |
1306 | struct mlx5_cmd_msg *n; | |
1307 | ||
1308 | list_for_each_entry_safe(msg, n, &cmd->cache.large.head, list) { | |
1309 | list_del(&msg->list); | |
1310 | mlx5_free_cmd_msg(dev, msg); | |
1311 | } | |
1312 | ||
1313 | list_for_each_entry_safe(msg, n, &cmd->cache.med.head, list) { | |
1314 | list_del(&msg->list); | |
1315 | mlx5_free_cmd_msg(dev, msg); | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | static int create_msg_cache(struct mlx5_core_dev *dev) | |
1320 | { | |
1321 | struct mlx5_cmd *cmd = &dev->cmd; | |
1322 | struct mlx5_cmd_msg *msg; | |
1323 | int err; | |
1324 | int i; | |
1325 | ||
1326 | spin_lock_init(&cmd->cache.large.lock); | |
1327 | INIT_LIST_HEAD(&cmd->cache.large.head); | |
1328 | spin_lock_init(&cmd->cache.med.lock); | |
1329 | INIT_LIST_HEAD(&cmd->cache.med.head); | |
1330 | ||
1331 | for (i = 0; i < NUM_LONG_LISTS; i++) { | |
1332 | msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, LONG_LIST_SIZE); | |
1333 | if (IS_ERR(msg)) { | |
1334 | err = PTR_ERR(msg); | |
1335 | goto ex_err; | |
1336 | } | |
1337 | msg->cache = &cmd->cache.large; | |
1338 | list_add_tail(&msg->list, &cmd->cache.large.head); | |
1339 | } | |
1340 | ||
1341 | for (i = 0; i < NUM_MED_LISTS; i++) { | |
1342 | msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, MED_LIST_SIZE); | |
1343 | if (IS_ERR(msg)) { | |
1344 | err = PTR_ERR(msg); | |
1345 | goto ex_err; | |
1346 | } | |
1347 | msg->cache = &cmd->cache.med; | |
1348 | list_add_tail(&msg->list, &cmd->cache.med.head); | |
1349 | } | |
1350 | ||
1351 | return 0; | |
1352 | ||
1353 | ex_err: | |
1354 | destroy_msg_cache(dev); | |
1355 | return err; | |
1356 | } | |
1357 | ||
1358 | int mlx5_cmd_init(struct mlx5_core_dev *dev) | |
1359 | { | |
1360 | int size = sizeof(struct mlx5_cmd_prot_block); | |
1361 | int align = roundup_pow_of_two(size); | |
1362 | struct mlx5_cmd *cmd = &dev->cmd; | |
1363 | u32 cmd_h, cmd_l; | |
1364 | u16 cmd_if_rev; | |
1365 | int err; | |
1366 | int i; | |
1367 | ||
1368 | cmd_if_rev = cmdif_rev(dev); | |
1369 | if (cmd_if_rev != CMD_IF_REV) { | |
1370 | dev_err(&dev->pdev->dev, | |
1371 | "Driver cmdif rev(%d) differs from firmware's(%d)\n", | |
1372 | CMD_IF_REV, cmd_if_rev); | |
1373 | return -EINVAL; | |
1374 | } | |
1375 | ||
1376 | cmd->pool = pci_pool_create("mlx5_cmd", dev->pdev, size, align, 0); | |
1377 | if (!cmd->pool) | |
1378 | return -ENOMEM; | |
1379 | ||
1380 | cmd->cmd_buf = (void *)__get_free_pages(GFP_ATOMIC, 0); | |
1381 | if (!cmd->cmd_buf) { | |
1382 | err = -ENOMEM; | |
1383 | goto err_free_pool; | |
1384 | } | |
1385 | cmd->dma = dma_map_single(&dev->pdev->dev, cmd->cmd_buf, PAGE_SIZE, | |
1386 | DMA_BIDIRECTIONAL); | |
1387 | if (dma_mapping_error(&dev->pdev->dev, cmd->dma)) { | |
1388 | err = -ENOMEM; | |
1389 | goto err_free; | |
1390 | } | |
1391 | ||
1392 | cmd_l = ioread32be(&dev->iseg->cmdq_addr_l_sz) & 0xff; | |
1393 | cmd->log_sz = cmd_l >> 4 & 0xf; | |
1394 | cmd->log_stride = cmd_l & 0xf; | |
1395 | if (1 << cmd->log_sz > MLX5_MAX_COMMANDS) { | |
1396 | dev_err(&dev->pdev->dev, "firmware reports too many outstanding commands %d\n", | |
1397 | 1 << cmd->log_sz); | |
1398 | err = -EINVAL; | |
1399 | goto err_map; | |
1400 | } | |
1401 | ||
1402 | if (cmd->log_sz + cmd->log_stride > PAGE_SHIFT) { | |
1403 | dev_err(&dev->pdev->dev, "command queue size overflow\n"); | |
1404 | err = -EINVAL; | |
1405 | goto err_map; | |
1406 | } | |
1407 | ||
c1868b82 | 1408 | cmd->checksum_disabled = 1; |
e126ba97 EC |
1409 | cmd->max_reg_cmds = (1 << cmd->log_sz) - 1; |
1410 | cmd->bitmask = (1 << cmd->max_reg_cmds) - 1; | |
1411 | ||
1412 | cmd->cmdif_rev = ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16; | |
1413 | if (cmd->cmdif_rev > CMD_IF_REV) { | |
1414 | dev_err(&dev->pdev->dev, "driver does not support command interface version. driver %d, firmware %d\n", | |
1415 | CMD_IF_REV, cmd->cmdif_rev); | |
1416 | err = -ENOTSUPP; | |
1417 | goto err_map; | |
1418 | } | |
1419 | ||
1420 | spin_lock_init(&cmd->alloc_lock); | |
1421 | spin_lock_init(&cmd->token_lock); | |
1422 | for (i = 0; i < ARRAY_SIZE(cmd->stats); i++) | |
1423 | spin_lock_init(&cmd->stats[i].lock); | |
1424 | ||
1425 | sema_init(&cmd->sem, cmd->max_reg_cmds); | |
1426 | sema_init(&cmd->pages_sem, 1); | |
1427 | ||
1428 | cmd_h = (u32)((u64)(cmd->dma) >> 32); | |
1429 | cmd_l = (u32)(cmd->dma); | |
1430 | if (cmd_l & 0xfff) { | |
1431 | dev_err(&dev->pdev->dev, "invalid command queue address\n"); | |
1432 | err = -ENOMEM; | |
1433 | goto err_map; | |
1434 | } | |
1435 | ||
1436 | iowrite32be(cmd_h, &dev->iseg->cmdq_addr_h); | |
1437 | iowrite32be(cmd_l, &dev->iseg->cmdq_addr_l_sz); | |
1438 | ||
1439 | /* Make sure firmware sees the complete address before we proceed */ | |
1440 | wmb(); | |
1441 | ||
1442 | mlx5_core_dbg(dev, "descriptor at dma 0x%llx\n", (unsigned long long)(cmd->dma)); | |
1443 | ||
1444 | cmd->mode = CMD_MODE_POLLING; | |
1445 | ||
1446 | err = create_msg_cache(dev); | |
1447 | if (err) { | |
1448 | dev_err(&dev->pdev->dev, "failed to create command cache\n"); | |
1449 | goto err_map; | |
1450 | } | |
1451 | ||
1452 | set_wqname(dev); | |
1453 | cmd->wq = create_singlethread_workqueue(cmd->wq_name); | |
1454 | if (!cmd->wq) { | |
1455 | dev_err(&dev->pdev->dev, "failed to create command workqueue\n"); | |
1456 | err = -ENOMEM; | |
1457 | goto err_cache; | |
1458 | } | |
1459 | ||
1460 | err = create_debugfs_files(dev); | |
1461 | if (err) { | |
1462 | err = -ENOMEM; | |
1463 | goto err_wq; | |
1464 | } | |
1465 | ||
1466 | return 0; | |
1467 | ||
1468 | err_wq: | |
1469 | destroy_workqueue(cmd->wq); | |
1470 | ||
1471 | err_cache: | |
1472 | destroy_msg_cache(dev); | |
1473 | ||
1474 | err_map: | |
1475 | dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, | |
1476 | DMA_BIDIRECTIONAL); | |
1477 | err_free: | |
1478 | free_pages((unsigned long)cmd->cmd_buf, 0); | |
1479 | ||
1480 | err_free_pool: | |
1481 | pci_pool_destroy(cmd->pool); | |
1482 | ||
1483 | return err; | |
1484 | } | |
1485 | EXPORT_SYMBOL(mlx5_cmd_init); | |
1486 | ||
1487 | void mlx5_cmd_cleanup(struct mlx5_core_dev *dev) | |
1488 | { | |
1489 | struct mlx5_cmd *cmd = &dev->cmd; | |
1490 | ||
1491 | clean_debug_files(dev); | |
1492 | destroy_workqueue(cmd->wq); | |
1493 | destroy_msg_cache(dev); | |
1494 | dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, | |
1495 | DMA_BIDIRECTIONAL); | |
1496 | free_pages((unsigned long)cmd->cmd_buf, 0); | |
1497 | pci_pool_destroy(cmd->pool); | |
1498 | } | |
1499 | EXPORT_SYMBOL(mlx5_cmd_cleanup); | |
1500 | ||
1501 | static const char *cmd_status_str(u8 status) | |
1502 | { | |
1503 | switch (status) { | |
1504 | case MLX5_CMD_STAT_OK: | |
1505 | return "OK"; | |
1506 | case MLX5_CMD_STAT_INT_ERR: | |
1507 | return "internal error"; | |
1508 | case MLX5_CMD_STAT_BAD_OP_ERR: | |
1509 | return "bad operation"; | |
1510 | case MLX5_CMD_STAT_BAD_PARAM_ERR: | |
1511 | return "bad parameter"; | |
1512 | case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: | |
1513 | return "bad system state"; | |
1514 | case MLX5_CMD_STAT_BAD_RES_ERR: | |
1515 | return "bad resource"; | |
1516 | case MLX5_CMD_STAT_RES_BUSY: | |
1517 | return "resource busy"; | |
1518 | case MLX5_CMD_STAT_LIM_ERR: | |
1519 | return "limits exceeded"; | |
1520 | case MLX5_CMD_STAT_BAD_RES_STATE_ERR: | |
1521 | return "bad resource state"; | |
1522 | case MLX5_CMD_STAT_IX_ERR: | |
1523 | return "bad index"; | |
1524 | case MLX5_CMD_STAT_NO_RES_ERR: | |
1525 | return "no resources"; | |
1526 | case MLX5_CMD_STAT_BAD_INP_LEN_ERR: | |
1527 | return "bad input length"; | |
1528 | case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: | |
1529 | return "bad output length"; | |
1530 | case MLX5_CMD_STAT_BAD_QP_STATE_ERR: | |
1531 | return "bad QP state"; | |
1532 | case MLX5_CMD_STAT_BAD_PKT_ERR: | |
1533 | return "bad packet (discarded)"; | |
1534 | case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: | |
1535 | return "bad size too many outstanding CQEs"; | |
1536 | default: | |
1537 | return "unknown status"; | |
1538 | } | |
1539 | } | |
1540 | ||
1541 | int mlx5_cmd_status_to_err(struct mlx5_outbox_hdr *hdr) | |
1542 | { | |
1543 | if (!hdr->status) | |
1544 | return 0; | |
1545 | ||
1546 | pr_warn("command failed, status %s(0x%x), syndrome 0x%x\n", | |
1547 | cmd_status_str(hdr->status), hdr->status, | |
1548 | be32_to_cpu(hdr->syndrome)); | |
1549 | ||
1550 | switch (hdr->status) { | |
1551 | case MLX5_CMD_STAT_OK: return 0; | |
1552 | case MLX5_CMD_STAT_INT_ERR: return -EIO; | |
1553 | case MLX5_CMD_STAT_BAD_OP_ERR: return -EINVAL; | |
1554 | case MLX5_CMD_STAT_BAD_PARAM_ERR: return -EINVAL; | |
1555 | case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: return -EIO; | |
1556 | case MLX5_CMD_STAT_BAD_RES_ERR: return -EINVAL; | |
1557 | case MLX5_CMD_STAT_RES_BUSY: return -EBUSY; | |
9c865131 | 1558 | case MLX5_CMD_STAT_LIM_ERR: return -ENOMEM; |
e126ba97 EC |
1559 | case MLX5_CMD_STAT_BAD_RES_STATE_ERR: return -EINVAL; |
1560 | case MLX5_CMD_STAT_IX_ERR: return -EINVAL; | |
1561 | case MLX5_CMD_STAT_NO_RES_ERR: return -EAGAIN; | |
1562 | case MLX5_CMD_STAT_BAD_INP_LEN_ERR: return -EIO; | |
1563 | case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: return -EIO; | |
1564 | case MLX5_CMD_STAT_BAD_QP_STATE_ERR: return -EINVAL; | |
1565 | case MLX5_CMD_STAT_BAD_PKT_ERR: return -EINVAL; | |
1566 | case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: return -EINVAL; | |
1567 | default: return -EIO; | |
1568 | } | |
1569 | } |