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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> | |
35 | #include <linux/init.h> | |
36 | #include <linux/errno.h> | |
37 | #include <linux/pci.h> | |
38 | #include <linux/dma-mapping.h> | |
39 | #include <linux/slab.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/random.h> | |
42 | #include <linux/io-mapping.h> | |
43 | #include <linux/mlx5/driver.h> | |
44 | #include <linux/debugfs.h> | |
45 | ||
46 | #include "mlx5_core.h" | |
47 | ||
48 | enum { | |
49 | CMD_IF_REV = 3, | |
50 | }; | |
51 | ||
52 | enum { | |
53 | CMD_MODE_POLLING, | |
54 | CMD_MODE_EVENTS | |
55 | }; | |
56 | ||
57 | enum { | |
58 | NUM_LONG_LISTS = 2, | |
59 | NUM_MED_LISTS = 64, | |
60 | LONG_LIST_SIZE = (2ULL * 1024 * 1024 * 1024 / PAGE_SIZE) * 8 + 16 + | |
61 | MLX5_CMD_DATA_BLOCK_SIZE, | |
62 | MED_LIST_SIZE = 16 + MLX5_CMD_DATA_BLOCK_SIZE, | |
63 | }; | |
64 | ||
65 | enum { | |
66 | MLX5_CMD_DELIVERY_STAT_OK = 0x0, | |
67 | MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR = 0x1, | |
68 | MLX5_CMD_DELIVERY_STAT_TOK_ERR = 0x2, | |
69 | MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR = 0x3, | |
70 | MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR = 0x4, | |
71 | MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR = 0x5, | |
72 | MLX5_CMD_DELIVERY_STAT_FW_ERR = 0x6, | |
73 | MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR = 0x7, | |
74 | MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR = 0x8, | |
75 | MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR = 0x9, | |
76 | MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR = 0x10, | |
77 | }; | |
78 | ||
79 | enum { | |
80 | MLX5_CMD_STAT_OK = 0x0, | |
81 | MLX5_CMD_STAT_INT_ERR = 0x1, | |
82 | MLX5_CMD_STAT_BAD_OP_ERR = 0x2, | |
83 | MLX5_CMD_STAT_BAD_PARAM_ERR = 0x3, | |
84 | MLX5_CMD_STAT_BAD_SYS_STATE_ERR = 0x4, | |
85 | MLX5_CMD_STAT_BAD_RES_ERR = 0x5, | |
86 | MLX5_CMD_STAT_RES_BUSY = 0x6, | |
87 | MLX5_CMD_STAT_LIM_ERR = 0x8, | |
88 | MLX5_CMD_STAT_BAD_RES_STATE_ERR = 0x9, | |
89 | MLX5_CMD_STAT_IX_ERR = 0xa, | |
90 | MLX5_CMD_STAT_NO_RES_ERR = 0xf, | |
91 | MLX5_CMD_STAT_BAD_INP_LEN_ERR = 0x50, | |
92 | MLX5_CMD_STAT_BAD_OUTP_LEN_ERR = 0x51, | |
93 | MLX5_CMD_STAT_BAD_QP_STATE_ERR = 0x10, | |
94 | MLX5_CMD_STAT_BAD_PKT_ERR = 0x30, | |
95 | MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR = 0x40, | |
96 | }; | |
97 | ||
98 | static struct mlx5_cmd_work_ent *alloc_cmd(struct mlx5_cmd *cmd, | |
99 | struct mlx5_cmd_msg *in, | |
100 | struct mlx5_cmd_msg *out, | |
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; | |
113 | ent->callback = cbk; | |
114 | ent->context = context; | |
115 | ent->cmd = cmd; | |
116 | ent->page_queue = page_queue; | |
117 | ||
118 | return ent; | |
119 | } | |
120 | ||
121 | static u8 alloc_token(struct mlx5_cmd *cmd) | |
122 | { | |
123 | u8 token; | |
124 | ||
125 | spin_lock(&cmd->token_lock); | |
126 | token = cmd->token++ % 255 + 1; | |
127 | spin_unlock(&cmd->token_lock); | |
128 | ||
129 | return token; | |
130 | } | |
131 | ||
132 | static int alloc_ent(struct mlx5_cmd *cmd) | |
133 | { | |
134 | unsigned long flags; | |
135 | int ret; | |
136 | ||
137 | spin_lock_irqsave(&cmd->alloc_lock, flags); | |
138 | ret = find_first_bit(&cmd->bitmask, cmd->max_reg_cmds); | |
139 | if (ret < cmd->max_reg_cmds) | |
140 | clear_bit(ret, &cmd->bitmask); | |
141 | spin_unlock_irqrestore(&cmd->alloc_lock, flags); | |
142 | ||
143 | return ret < cmd->max_reg_cmds ? ret : -ENOMEM; | |
144 | } | |
145 | ||
146 | static void free_ent(struct mlx5_cmd *cmd, int idx) | |
147 | { | |
148 | unsigned long flags; | |
149 | ||
150 | spin_lock_irqsave(&cmd->alloc_lock, flags); | |
151 | set_bit(idx, &cmd->bitmask); | |
152 | spin_unlock_irqrestore(&cmd->alloc_lock, flags); | |
153 | } | |
154 | ||
155 | static struct mlx5_cmd_layout *get_inst(struct mlx5_cmd *cmd, int idx) | |
156 | { | |
157 | return cmd->cmd_buf + (idx << cmd->log_stride); | |
158 | } | |
159 | ||
160 | static u8 xor8_buf(void *buf, int len) | |
161 | { | |
162 | u8 *ptr = buf; | |
163 | u8 sum = 0; | |
164 | int i; | |
165 | ||
166 | for (i = 0; i < len; i++) | |
167 | sum ^= ptr[i]; | |
168 | ||
169 | return sum; | |
170 | } | |
171 | ||
172 | static int verify_block_sig(struct mlx5_cmd_prot_block *block) | |
173 | { | |
174 | if (xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 1) != 0xff) | |
175 | return -EINVAL; | |
176 | ||
177 | if (xor8_buf(block, sizeof(*block)) != 0xff) | |
178 | return -EINVAL; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | static void calc_block_sig(struct mlx5_cmd_prot_block *block, u8 token) | |
184 | { | |
185 | block->token = token; | |
186 | block->ctrl_sig = ~xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 2); | |
187 | block->sig = ~xor8_buf(block, sizeof(*block) - 1); | |
188 | } | |
189 | ||
190 | static void calc_chain_sig(struct mlx5_cmd_msg *msg, u8 token) | |
191 | { | |
192 | struct mlx5_cmd_mailbox *next = msg->next; | |
193 | ||
194 | while (next) { | |
195 | calc_block_sig(next->buf, token); | |
196 | next = next->next; | |
197 | } | |
198 | } | |
199 | ||
200 | static void set_signature(struct mlx5_cmd_work_ent *ent) | |
201 | { | |
202 | ent->lay->sig = ~xor8_buf(ent->lay, sizeof(*ent->lay)); | |
203 | calc_chain_sig(ent->in, ent->token); | |
204 | calc_chain_sig(ent->out, ent->token); | |
205 | } | |
206 | ||
207 | static void poll_timeout(struct mlx5_cmd_work_ent *ent) | |
208 | { | |
209 | unsigned long poll_end = jiffies + msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC + 1000); | |
210 | u8 own; | |
211 | ||
212 | do { | |
213 | own = ent->lay->status_own; | |
214 | if (!(own & CMD_OWNER_HW)) { | |
215 | ent->ret = 0; | |
216 | return; | |
217 | } | |
218 | usleep_range(5000, 10000); | |
219 | } while (time_before(jiffies, poll_end)); | |
220 | ||
221 | ent->ret = -ETIMEDOUT; | |
222 | } | |
223 | ||
224 | static void free_cmd(struct mlx5_cmd_work_ent *ent) | |
225 | { | |
226 | kfree(ent); | |
227 | } | |
228 | ||
229 | ||
230 | static int verify_signature(struct mlx5_cmd_work_ent *ent) | |
231 | { | |
232 | struct mlx5_cmd_mailbox *next = ent->out->next; | |
233 | int err; | |
234 | u8 sig; | |
235 | ||
236 | sig = xor8_buf(ent->lay, sizeof(*ent->lay)); | |
237 | if (sig != 0xff) | |
238 | return -EINVAL; | |
239 | ||
240 | while (next) { | |
241 | err = verify_block_sig(next->buf); | |
242 | if (err) | |
243 | return err; | |
244 | ||
245 | next = next->next; | |
246 | } | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | static void dump_buf(void *buf, int size, int data_only, int offset) | |
252 | { | |
253 | __be32 *p = buf; | |
254 | int i; | |
255 | ||
256 | for (i = 0; i < size; i += 16) { | |
257 | pr_debug("%03x: %08x %08x %08x %08x\n", offset, be32_to_cpu(p[0]), | |
258 | be32_to_cpu(p[1]), be32_to_cpu(p[2]), | |
259 | be32_to_cpu(p[3])); | |
260 | p += 4; | |
261 | offset += 16; | |
262 | } | |
263 | if (!data_only) | |
264 | pr_debug("\n"); | |
265 | } | |
266 | ||
267 | const char *mlx5_command_str(int command) | |
268 | { | |
269 | switch (command) { | |
270 | case MLX5_CMD_OP_QUERY_HCA_CAP: | |
271 | return "QUERY_HCA_CAP"; | |
272 | ||
273 | case MLX5_CMD_OP_SET_HCA_CAP: | |
274 | return "SET_HCA_CAP"; | |
275 | ||
276 | case MLX5_CMD_OP_QUERY_ADAPTER: | |
277 | return "QUERY_ADAPTER"; | |
278 | ||
279 | case MLX5_CMD_OP_INIT_HCA: | |
280 | return "INIT_HCA"; | |
281 | ||
282 | case MLX5_CMD_OP_TEARDOWN_HCA: | |
283 | return "TEARDOWN_HCA"; | |
284 | ||
285 | case MLX5_CMD_OP_QUERY_PAGES: | |
286 | return "QUERY_PAGES"; | |
287 | ||
288 | case MLX5_CMD_OP_MANAGE_PAGES: | |
289 | return "MANAGE_PAGES"; | |
290 | ||
291 | case MLX5_CMD_OP_CREATE_MKEY: | |
292 | return "CREATE_MKEY"; | |
293 | ||
294 | case MLX5_CMD_OP_QUERY_MKEY: | |
295 | return "QUERY_MKEY"; | |
296 | ||
297 | case MLX5_CMD_OP_DESTROY_MKEY: | |
298 | return "DESTROY_MKEY"; | |
299 | ||
300 | case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS: | |
301 | return "QUERY_SPECIAL_CONTEXTS"; | |
302 | ||
303 | case MLX5_CMD_OP_CREATE_EQ: | |
304 | return "CREATE_EQ"; | |
305 | ||
306 | case MLX5_CMD_OP_DESTROY_EQ: | |
307 | return "DESTROY_EQ"; | |
308 | ||
309 | case MLX5_CMD_OP_QUERY_EQ: | |
310 | return "QUERY_EQ"; | |
311 | ||
312 | case MLX5_CMD_OP_CREATE_CQ: | |
313 | return "CREATE_CQ"; | |
314 | ||
315 | case MLX5_CMD_OP_DESTROY_CQ: | |
316 | return "DESTROY_CQ"; | |
317 | ||
318 | case MLX5_CMD_OP_QUERY_CQ: | |
319 | return "QUERY_CQ"; | |
320 | ||
321 | case MLX5_CMD_OP_MODIFY_CQ: | |
322 | return "MODIFY_CQ"; | |
323 | ||
324 | case MLX5_CMD_OP_CREATE_QP: | |
325 | return "CREATE_QP"; | |
326 | ||
327 | case MLX5_CMD_OP_DESTROY_QP: | |
328 | return "DESTROY_QP"; | |
329 | ||
330 | case MLX5_CMD_OP_RST2INIT_QP: | |
331 | return "RST2INIT_QP"; | |
332 | ||
333 | case MLX5_CMD_OP_INIT2RTR_QP: | |
334 | return "INIT2RTR_QP"; | |
335 | ||
336 | case MLX5_CMD_OP_RTR2RTS_QP: | |
337 | return "RTR2RTS_QP"; | |
338 | ||
339 | case MLX5_CMD_OP_RTS2RTS_QP: | |
340 | return "RTS2RTS_QP"; | |
341 | ||
342 | case MLX5_CMD_OP_SQERR2RTS_QP: | |
343 | return "SQERR2RTS_QP"; | |
344 | ||
345 | case MLX5_CMD_OP_2ERR_QP: | |
346 | return "2ERR_QP"; | |
347 | ||
348 | case MLX5_CMD_OP_RTS2SQD_QP: | |
349 | return "RTS2SQD_QP"; | |
350 | ||
351 | case MLX5_CMD_OP_SQD2RTS_QP: | |
352 | return "SQD2RTS_QP"; | |
353 | ||
354 | case MLX5_CMD_OP_2RST_QP: | |
355 | return "2RST_QP"; | |
356 | ||
357 | case MLX5_CMD_OP_QUERY_QP: | |
358 | return "QUERY_QP"; | |
359 | ||
360 | case MLX5_CMD_OP_CONF_SQP: | |
361 | return "CONF_SQP"; | |
362 | ||
363 | case MLX5_CMD_OP_MAD_IFC: | |
364 | return "MAD_IFC"; | |
365 | ||
366 | case MLX5_CMD_OP_INIT2INIT_QP: | |
367 | return "INIT2INIT_QP"; | |
368 | ||
369 | case MLX5_CMD_OP_SUSPEND_QP: | |
370 | return "SUSPEND_QP"; | |
371 | ||
372 | case MLX5_CMD_OP_UNSUSPEND_QP: | |
373 | return "UNSUSPEND_QP"; | |
374 | ||
375 | case MLX5_CMD_OP_SQD2SQD_QP: | |
376 | return "SQD2SQD_QP"; | |
377 | ||
378 | case MLX5_CMD_OP_ALLOC_QP_COUNTER_SET: | |
379 | return "ALLOC_QP_COUNTER_SET"; | |
380 | ||
381 | case MLX5_CMD_OP_DEALLOC_QP_COUNTER_SET: | |
382 | return "DEALLOC_QP_COUNTER_SET"; | |
383 | ||
384 | case MLX5_CMD_OP_QUERY_QP_COUNTER_SET: | |
385 | return "QUERY_QP_COUNTER_SET"; | |
386 | ||
387 | case MLX5_CMD_OP_CREATE_PSV: | |
388 | return "CREATE_PSV"; | |
389 | ||
390 | case MLX5_CMD_OP_DESTROY_PSV: | |
391 | return "DESTROY_PSV"; | |
392 | ||
393 | case MLX5_CMD_OP_QUERY_PSV: | |
394 | return "QUERY_PSV"; | |
395 | ||
396 | case MLX5_CMD_OP_QUERY_SIG_RULE_TABLE: | |
397 | return "QUERY_SIG_RULE_TABLE"; | |
398 | ||
399 | case MLX5_CMD_OP_QUERY_BLOCK_SIZE_TABLE: | |
400 | return "QUERY_BLOCK_SIZE_TABLE"; | |
401 | ||
402 | case MLX5_CMD_OP_CREATE_SRQ: | |
403 | return "CREATE_SRQ"; | |
404 | ||
405 | case MLX5_CMD_OP_DESTROY_SRQ: | |
406 | return "DESTROY_SRQ"; | |
407 | ||
408 | case MLX5_CMD_OP_QUERY_SRQ: | |
409 | return "QUERY_SRQ"; | |
410 | ||
411 | case MLX5_CMD_OP_ARM_RQ: | |
412 | return "ARM_RQ"; | |
413 | ||
414 | case MLX5_CMD_OP_RESIZE_SRQ: | |
415 | return "RESIZE_SRQ"; | |
416 | ||
417 | case MLX5_CMD_OP_ALLOC_PD: | |
418 | return "ALLOC_PD"; | |
419 | ||
420 | case MLX5_CMD_OP_DEALLOC_PD: | |
421 | return "DEALLOC_PD"; | |
422 | ||
423 | case MLX5_CMD_OP_ALLOC_UAR: | |
424 | return "ALLOC_UAR"; | |
425 | ||
426 | case MLX5_CMD_OP_DEALLOC_UAR: | |
427 | return "DEALLOC_UAR"; | |
428 | ||
429 | case MLX5_CMD_OP_ATTACH_TO_MCG: | |
430 | return "ATTACH_TO_MCG"; | |
431 | ||
432 | case MLX5_CMD_OP_DETACH_FROM_MCG: | |
433 | return "DETACH_FROM_MCG"; | |
434 | ||
435 | case MLX5_CMD_OP_ALLOC_XRCD: | |
436 | return "ALLOC_XRCD"; | |
437 | ||
438 | case MLX5_CMD_OP_DEALLOC_XRCD: | |
439 | return "DEALLOC_XRCD"; | |
440 | ||
441 | case MLX5_CMD_OP_ACCESS_REG: | |
442 | return "MLX5_CMD_OP_ACCESS_REG"; | |
443 | ||
444 | default: return "unknown command opcode"; | |
445 | } | |
446 | } | |
447 | ||
448 | static void dump_command(struct mlx5_core_dev *dev, | |
449 | struct mlx5_cmd_work_ent *ent, int input) | |
450 | { | |
451 | u16 op = be16_to_cpu(((struct mlx5_inbox_hdr *)(ent->lay->in))->opcode); | |
452 | struct mlx5_cmd_msg *msg = input ? ent->in : ent->out; | |
453 | struct mlx5_cmd_mailbox *next = msg->next; | |
454 | int data_only; | |
455 | int offset = 0; | |
456 | int dump_len; | |
457 | ||
458 | data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA)); | |
459 | ||
460 | if (data_only) | |
461 | mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA, | |
462 | "dump command data %s(0x%x) %s\n", | |
463 | mlx5_command_str(op), op, | |
464 | input ? "INPUT" : "OUTPUT"); | |
465 | else | |
466 | mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n", | |
467 | mlx5_command_str(op), op, | |
468 | input ? "INPUT" : "OUTPUT"); | |
469 | ||
470 | if (data_only) { | |
471 | if (input) { | |
472 | dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset); | |
473 | offset += sizeof(ent->lay->in); | |
474 | } else { | |
475 | dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset); | |
476 | offset += sizeof(ent->lay->out); | |
477 | } | |
478 | } else { | |
479 | dump_buf(ent->lay, sizeof(*ent->lay), 0, offset); | |
480 | offset += sizeof(*ent->lay); | |
481 | } | |
482 | ||
483 | while (next && offset < msg->len) { | |
484 | if (data_only) { | |
485 | dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset); | |
486 | dump_buf(next->buf, dump_len, 1, offset); | |
487 | offset += MLX5_CMD_DATA_BLOCK_SIZE; | |
488 | } else { | |
489 | mlx5_core_dbg(dev, "command block:\n"); | |
490 | dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset); | |
491 | offset += sizeof(struct mlx5_cmd_prot_block); | |
492 | } | |
493 | next = next->next; | |
494 | } | |
495 | ||
496 | if (data_only) | |
497 | pr_debug("\n"); | |
498 | } | |
499 | ||
500 | static void cmd_work_handler(struct work_struct *work) | |
501 | { | |
502 | struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work); | |
503 | struct mlx5_cmd *cmd = ent->cmd; | |
504 | struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev, cmd); | |
505 | struct mlx5_cmd_layout *lay; | |
506 | struct semaphore *sem; | |
507 | ||
508 | sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem; | |
509 | down(sem); | |
510 | if (!ent->page_queue) { | |
511 | ent->idx = alloc_ent(cmd); | |
512 | if (ent->idx < 0) { | |
513 | mlx5_core_err(dev, "failed to allocate command entry\n"); | |
514 | up(sem); | |
515 | return; | |
516 | } | |
517 | } else { | |
518 | ent->idx = cmd->max_reg_cmds; | |
519 | } | |
520 | ||
521 | ent->token = alloc_token(cmd); | |
522 | cmd->ent_arr[ent->idx] = ent; | |
523 | lay = get_inst(cmd, ent->idx); | |
524 | ent->lay = lay; | |
525 | memset(lay, 0, sizeof(*lay)); | |
526 | memcpy(lay->in, ent->in->first.data, sizeof(lay->in)); | |
527 | if (ent->in->next) | |
528 | lay->in_ptr = cpu_to_be64(ent->in->next->dma); | |
529 | lay->inlen = cpu_to_be32(ent->in->len); | |
530 | if (ent->out->next) | |
531 | lay->out_ptr = cpu_to_be64(ent->out->next->dma); | |
532 | lay->outlen = cpu_to_be32(ent->out->len); | |
533 | lay->type = MLX5_PCI_CMD_XPORT; | |
534 | lay->token = ent->token; | |
535 | lay->status_own = CMD_OWNER_HW; | |
536 | if (!cmd->checksum_disabled) | |
537 | set_signature(ent); | |
538 | dump_command(dev, ent, 1); | |
539 | ktime_get_ts(&ent->ts1); | |
540 | ||
541 | /* ring doorbell after the descriptor is valid */ | |
542 | wmb(); | |
543 | iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell); | |
544 | mlx5_core_dbg(dev, "write 0x%x to command doorbell\n", 1 << ent->idx); | |
545 | mmiowb(); | |
546 | if (cmd->mode == CMD_MODE_POLLING) { | |
547 | poll_timeout(ent); | |
548 | /* make sure we read the descriptor after ownership is SW */ | |
549 | rmb(); | |
550 | mlx5_cmd_comp_handler(dev, 1UL << ent->idx); | |
551 | } | |
552 | } | |
553 | ||
554 | static const char *deliv_status_to_str(u8 status) | |
555 | { | |
556 | switch (status) { | |
557 | case MLX5_CMD_DELIVERY_STAT_OK: | |
558 | return "no errors"; | |
559 | case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR: | |
560 | return "signature error"; | |
561 | case MLX5_CMD_DELIVERY_STAT_TOK_ERR: | |
562 | return "token error"; | |
563 | case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR: | |
564 | return "bad block number"; | |
565 | case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR: | |
566 | return "output pointer not aligned to block size"; | |
567 | case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR: | |
568 | return "input pointer not aligned to block size"; | |
569 | case MLX5_CMD_DELIVERY_STAT_FW_ERR: | |
570 | return "firmware internal error"; | |
571 | case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR: | |
572 | return "command input length error"; | |
573 | case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR: | |
574 | return "command ouput length error"; | |
575 | case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR: | |
576 | return "reserved fields not cleared"; | |
577 | case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR: | |
578 | return "bad command descriptor type"; | |
579 | default: | |
580 | return "unknown status code"; | |
581 | } | |
582 | } | |
583 | ||
584 | static u16 msg_to_opcode(struct mlx5_cmd_msg *in) | |
585 | { | |
586 | struct mlx5_inbox_hdr *hdr = (struct mlx5_inbox_hdr *)(in->first.data); | |
587 | ||
588 | return be16_to_cpu(hdr->opcode); | |
589 | } | |
590 | ||
591 | static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent) | |
592 | { | |
593 | unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC); | |
594 | struct mlx5_cmd *cmd = &dev->cmd; | |
595 | int err; | |
596 | ||
597 | if (cmd->mode == CMD_MODE_POLLING) { | |
598 | wait_for_completion(&ent->done); | |
599 | err = ent->ret; | |
600 | } else { | |
601 | if (!wait_for_completion_timeout(&ent->done, timeout)) | |
602 | err = -ETIMEDOUT; | |
603 | else | |
604 | err = 0; | |
605 | } | |
606 | if (err == -ETIMEDOUT) { | |
607 | mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n", | |
608 | mlx5_command_str(msg_to_opcode(ent->in)), | |
609 | msg_to_opcode(ent->in)); | |
610 | } | |
611 | mlx5_core_dbg(dev, "err %d, delivery status %s(%d)\n", err, | |
612 | deliv_status_to_str(ent->status), ent->status); | |
613 | ||
614 | return err; | |
615 | } | |
616 | ||
617 | /* Notes: | |
618 | * 1. Callback functions may not sleep | |
619 | * 2. page queue commands do not support asynchrous completion | |
620 | */ | |
621 | static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in, | |
622 | struct mlx5_cmd_msg *out, mlx5_cmd_cbk_t callback, | |
623 | void *context, int page_queue, u8 *status) | |
624 | { | |
625 | struct mlx5_cmd *cmd = &dev->cmd; | |
626 | struct mlx5_cmd_work_ent *ent; | |
627 | ktime_t t1, t2, delta; | |
628 | struct mlx5_cmd_stats *stats; | |
629 | int err = 0; | |
630 | s64 ds; | |
631 | u16 op; | |
632 | ||
633 | if (callback && page_queue) | |
634 | return -EINVAL; | |
635 | ||
636 | ent = alloc_cmd(cmd, in, out, callback, context, page_queue); | |
637 | if (IS_ERR(ent)) | |
638 | return PTR_ERR(ent); | |
639 | ||
640 | if (!callback) | |
641 | init_completion(&ent->done); | |
642 | ||
643 | INIT_WORK(&ent->work, cmd_work_handler); | |
644 | if (page_queue) { | |
645 | cmd_work_handler(&ent->work); | |
646 | } else if (!queue_work(cmd->wq, &ent->work)) { | |
647 | mlx5_core_warn(dev, "failed to queue work\n"); | |
648 | err = -ENOMEM; | |
649 | goto out_free; | |
650 | } | |
651 | ||
652 | if (!callback) { | |
653 | err = wait_func(dev, ent); | |
654 | if (err == -ETIMEDOUT) | |
655 | goto out; | |
656 | ||
657 | t1 = timespec_to_ktime(ent->ts1); | |
658 | t2 = timespec_to_ktime(ent->ts2); | |
659 | delta = ktime_sub(t2, t1); | |
660 | ds = ktime_to_ns(delta); | |
661 | op = be16_to_cpu(((struct mlx5_inbox_hdr *)in->first.data)->opcode); | |
662 | if (op < ARRAY_SIZE(cmd->stats)) { | |
663 | stats = &cmd->stats[op]; | |
664 | spin_lock(&stats->lock); | |
665 | stats->sum += ds; | |
666 | ++stats->n; | |
667 | spin_unlock(&stats->lock); | |
668 | } | |
669 | mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME, | |
670 | "fw exec time for %s is %lld nsec\n", | |
671 | mlx5_command_str(op), ds); | |
672 | *status = ent->status; | |
673 | free_cmd(ent); | |
674 | } | |
675 | ||
676 | return err; | |
677 | ||
678 | out_free: | |
679 | free_cmd(ent); | |
680 | out: | |
681 | return err; | |
682 | } | |
683 | ||
684 | static ssize_t dbg_write(struct file *filp, const char __user *buf, | |
685 | size_t count, loff_t *pos) | |
686 | { | |
687 | struct mlx5_core_dev *dev = filp->private_data; | |
688 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
689 | char lbuf[3]; | |
690 | int err; | |
691 | ||
692 | if (!dbg->in_msg || !dbg->out_msg) | |
693 | return -ENOMEM; | |
694 | ||
695 | if (copy_from_user(lbuf, buf, sizeof(lbuf))) | |
696 | return -EPERM; | |
697 | ||
698 | lbuf[sizeof(lbuf) - 1] = 0; | |
699 | ||
700 | if (strcmp(lbuf, "go")) | |
701 | return -EINVAL; | |
702 | ||
703 | err = mlx5_cmd_exec(dev, dbg->in_msg, dbg->inlen, dbg->out_msg, dbg->outlen); | |
704 | ||
705 | return err ? err : count; | |
706 | } | |
707 | ||
708 | ||
709 | static const struct file_operations fops = { | |
710 | .owner = THIS_MODULE, | |
711 | .open = simple_open, | |
712 | .write = dbg_write, | |
713 | }; | |
714 | ||
715 | static int mlx5_copy_to_msg(struct mlx5_cmd_msg *to, void *from, int size) | |
716 | { | |
717 | struct mlx5_cmd_prot_block *block; | |
718 | struct mlx5_cmd_mailbox *next; | |
719 | int copy; | |
720 | ||
721 | if (!to || !from) | |
722 | return -ENOMEM; | |
723 | ||
724 | copy = min_t(int, size, sizeof(to->first.data)); | |
725 | memcpy(to->first.data, from, copy); | |
726 | size -= copy; | |
727 | from += copy; | |
728 | ||
729 | next = to->next; | |
730 | while (size) { | |
731 | if (!next) { | |
732 | /* this is a BUG */ | |
733 | return -ENOMEM; | |
734 | } | |
735 | ||
736 | copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); | |
737 | block = next->buf; | |
738 | memcpy(block->data, from, copy); | |
739 | from += copy; | |
740 | size -= copy; | |
741 | next = next->next; | |
742 | } | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
747 | static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size) | |
748 | { | |
749 | struct mlx5_cmd_prot_block *block; | |
750 | struct mlx5_cmd_mailbox *next; | |
751 | int copy; | |
752 | ||
753 | if (!to || !from) | |
754 | return -ENOMEM; | |
755 | ||
756 | copy = min_t(int, size, sizeof(from->first.data)); | |
757 | memcpy(to, from->first.data, copy); | |
758 | size -= copy; | |
759 | to += copy; | |
760 | ||
761 | next = from->next; | |
762 | while (size) { | |
763 | if (!next) { | |
764 | /* this is a BUG */ | |
765 | return -ENOMEM; | |
766 | } | |
767 | ||
768 | copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); | |
769 | block = next->buf; | |
770 | if (xor8_buf(block, sizeof(*block)) != 0xff) | |
771 | return -EINVAL; | |
772 | ||
773 | memcpy(to, block->data, copy); | |
774 | to += copy; | |
775 | size -= copy; | |
776 | next = next->next; | |
777 | } | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
782 | static struct mlx5_cmd_mailbox *alloc_cmd_box(struct mlx5_core_dev *dev, | |
783 | gfp_t flags) | |
784 | { | |
785 | struct mlx5_cmd_mailbox *mailbox; | |
786 | ||
787 | mailbox = kmalloc(sizeof(*mailbox), flags); | |
788 | if (!mailbox) | |
789 | return ERR_PTR(-ENOMEM); | |
790 | ||
791 | mailbox->buf = pci_pool_alloc(dev->cmd.pool, flags, | |
792 | &mailbox->dma); | |
793 | if (!mailbox->buf) { | |
794 | mlx5_core_dbg(dev, "failed allocation\n"); | |
795 | kfree(mailbox); | |
796 | return ERR_PTR(-ENOMEM); | |
797 | } | |
798 | memset(mailbox->buf, 0, sizeof(struct mlx5_cmd_prot_block)); | |
799 | mailbox->next = NULL; | |
800 | ||
801 | return mailbox; | |
802 | } | |
803 | ||
804 | static void free_cmd_box(struct mlx5_core_dev *dev, | |
805 | struct mlx5_cmd_mailbox *mailbox) | |
806 | { | |
807 | pci_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma); | |
808 | kfree(mailbox); | |
809 | } | |
810 | ||
811 | static struct mlx5_cmd_msg *mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev, | |
812 | gfp_t flags, int size) | |
813 | { | |
814 | struct mlx5_cmd_mailbox *tmp, *head = NULL; | |
815 | struct mlx5_cmd_prot_block *block; | |
816 | struct mlx5_cmd_msg *msg; | |
817 | int blen; | |
818 | int err; | |
819 | int n; | |
820 | int i; | |
821 | ||
822 | msg = kzalloc(sizeof(*msg), GFP_KERNEL); | |
823 | if (!msg) | |
824 | return ERR_PTR(-ENOMEM); | |
825 | ||
826 | blen = size - min_t(int, sizeof(msg->first.data), size); | |
827 | n = (blen + MLX5_CMD_DATA_BLOCK_SIZE - 1) / MLX5_CMD_DATA_BLOCK_SIZE; | |
828 | ||
829 | for (i = 0; i < n; i++) { | |
830 | tmp = alloc_cmd_box(dev, flags); | |
831 | if (IS_ERR(tmp)) { | |
832 | mlx5_core_warn(dev, "failed allocating block\n"); | |
833 | err = PTR_ERR(tmp); | |
834 | goto err_alloc; | |
835 | } | |
836 | ||
837 | block = tmp->buf; | |
838 | tmp->next = head; | |
839 | block->next = cpu_to_be64(tmp->next ? tmp->next->dma : 0); | |
840 | block->block_num = cpu_to_be32(n - i - 1); | |
841 | head = tmp; | |
842 | } | |
843 | msg->next = head; | |
844 | msg->len = size; | |
845 | return msg; | |
846 | ||
847 | err_alloc: | |
848 | while (head) { | |
849 | tmp = head->next; | |
850 | free_cmd_box(dev, head); | |
851 | head = tmp; | |
852 | } | |
853 | kfree(msg); | |
854 | ||
855 | return ERR_PTR(err); | |
856 | } | |
857 | ||
858 | static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev, | |
859 | struct mlx5_cmd_msg *msg) | |
860 | { | |
861 | struct mlx5_cmd_mailbox *head = msg->next; | |
862 | struct mlx5_cmd_mailbox *next; | |
863 | ||
864 | while (head) { | |
865 | next = head->next; | |
866 | free_cmd_box(dev, head); | |
867 | head = next; | |
868 | } | |
869 | kfree(msg); | |
870 | } | |
871 | ||
872 | static ssize_t data_write(struct file *filp, const char __user *buf, | |
873 | size_t count, loff_t *pos) | |
874 | { | |
875 | struct mlx5_core_dev *dev = filp->private_data; | |
876 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
877 | void *ptr; | |
878 | int err; | |
879 | ||
880 | if (*pos != 0) | |
881 | return -EINVAL; | |
882 | ||
883 | kfree(dbg->in_msg); | |
884 | dbg->in_msg = NULL; | |
885 | dbg->inlen = 0; | |
886 | ||
887 | ptr = kzalloc(count, GFP_KERNEL); | |
888 | if (!ptr) | |
889 | return -ENOMEM; | |
890 | ||
891 | if (copy_from_user(ptr, buf, count)) { | |
892 | err = -EPERM; | |
893 | goto out; | |
894 | } | |
895 | dbg->in_msg = ptr; | |
896 | dbg->inlen = count; | |
897 | ||
898 | *pos = count; | |
899 | ||
900 | return count; | |
901 | ||
902 | out: | |
903 | kfree(ptr); | |
904 | return err; | |
905 | } | |
906 | ||
907 | static ssize_t data_read(struct file *filp, char __user *buf, size_t count, | |
908 | loff_t *pos) | |
909 | { | |
910 | struct mlx5_core_dev *dev = filp->private_data; | |
911 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
912 | int copy; | |
913 | ||
914 | if (*pos) | |
915 | return 0; | |
916 | ||
917 | if (!dbg->out_msg) | |
918 | return -ENOMEM; | |
919 | ||
920 | copy = min_t(int, count, dbg->outlen); | |
921 | if (copy_to_user(buf, dbg->out_msg, copy)) | |
922 | return -EPERM; | |
923 | ||
924 | *pos += copy; | |
925 | ||
926 | return copy; | |
927 | } | |
928 | ||
929 | static const struct file_operations dfops = { | |
930 | .owner = THIS_MODULE, | |
931 | .open = simple_open, | |
932 | .write = data_write, | |
933 | .read = data_read, | |
934 | }; | |
935 | ||
936 | static ssize_t outlen_read(struct file *filp, char __user *buf, size_t count, | |
937 | loff_t *pos) | |
938 | { | |
939 | struct mlx5_core_dev *dev = filp->private_data; | |
940 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
941 | char outlen[8]; | |
942 | int err; | |
943 | ||
944 | if (*pos) | |
945 | return 0; | |
946 | ||
947 | err = snprintf(outlen, sizeof(outlen), "%d", dbg->outlen); | |
948 | if (err < 0) | |
949 | return err; | |
950 | ||
951 | if (copy_to_user(buf, &outlen, err)) | |
952 | return -EPERM; | |
953 | ||
954 | *pos += err; | |
955 | ||
956 | return err; | |
957 | } | |
958 | ||
959 | static ssize_t outlen_write(struct file *filp, const char __user *buf, | |
960 | size_t count, loff_t *pos) | |
961 | { | |
962 | struct mlx5_core_dev *dev = filp->private_data; | |
963 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
964 | char outlen_str[8]; | |
965 | int outlen; | |
966 | void *ptr; | |
967 | int err; | |
968 | ||
969 | if (*pos != 0 || count > 6) | |
970 | return -EINVAL; | |
971 | ||
972 | kfree(dbg->out_msg); | |
973 | dbg->out_msg = NULL; | |
974 | dbg->outlen = 0; | |
975 | ||
976 | if (copy_from_user(outlen_str, buf, count)) | |
977 | return -EPERM; | |
978 | ||
979 | outlen_str[7] = 0; | |
980 | ||
981 | err = sscanf(outlen_str, "%d", &outlen); | |
982 | if (err < 0) | |
983 | return err; | |
984 | ||
985 | ptr = kzalloc(outlen, GFP_KERNEL); | |
986 | if (!ptr) | |
987 | return -ENOMEM; | |
988 | ||
989 | dbg->out_msg = ptr; | |
990 | dbg->outlen = outlen; | |
991 | ||
992 | *pos = count; | |
993 | ||
994 | return count; | |
995 | } | |
996 | ||
997 | static const struct file_operations olfops = { | |
998 | .owner = THIS_MODULE, | |
999 | .open = simple_open, | |
1000 | .write = outlen_write, | |
1001 | .read = outlen_read, | |
1002 | }; | |
1003 | ||
1004 | static void set_wqname(struct mlx5_core_dev *dev) | |
1005 | { | |
1006 | struct mlx5_cmd *cmd = &dev->cmd; | |
1007 | ||
1008 | snprintf(cmd->wq_name, sizeof(cmd->wq_name), "mlx5_cmd_%s", | |
1009 | dev_name(&dev->pdev->dev)); | |
1010 | } | |
1011 | ||
1012 | static void clean_debug_files(struct mlx5_core_dev *dev) | |
1013 | { | |
1014 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
1015 | ||
1016 | if (!mlx5_debugfs_root) | |
1017 | return; | |
1018 | ||
1019 | mlx5_cmdif_debugfs_cleanup(dev); | |
1020 | debugfs_remove_recursive(dbg->dbg_root); | |
1021 | } | |
1022 | ||
1023 | static int create_debugfs_files(struct mlx5_core_dev *dev) | |
1024 | { | |
1025 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
1026 | int err = -ENOMEM; | |
1027 | ||
1028 | if (!mlx5_debugfs_root) | |
1029 | return 0; | |
1030 | ||
1031 | dbg->dbg_root = debugfs_create_dir("cmd", dev->priv.dbg_root); | |
1032 | if (!dbg->dbg_root) | |
1033 | return err; | |
1034 | ||
1035 | dbg->dbg_in = debugfs_create_file("in", 0400, dbg->dbg_root, | |
1036 | dev, &dfops); | |
1037 | if (!dbg->dbg_in) | |
1038 | goto err_dbg; | |
1039 | ||
1040 | dbg->dbg_out = debugfs_create_file("out", 0200, dbg->dbg_root, | |
1041 | dev, &dfops); | |
1042 | if (!dbg->dbg_out) | |
1043 | goto err_dbg; | |
1044 | ||
1045 | dbg->dbg_outlen = debugfs_create_file("out_len", 0600, dbg->dbg_root, | |
1046 | dev, &olfops); | |
1047 | if (!dbg->dbg_outlen) | |
1048 | goto err_dbg; | |
1049 | ||
1050 | dbg->dbg_status = debugfs_create_u8("status", 0600, dbg->dbg_root, | |
1051 | &dbg->status); | |
1052 | if (!dbg->dbg_status) | |
1053 | goto err_dbg; | |
1054 | ||
1055 | dbg->dbg_run = debugfs_create_file("run", 0200, dbg->dbg_root, dev, &fops); | |
1056 | if (!dbg->dbg_run) | |
1057 | goto err_dbg; | |
1058 | ||
1059 | mlx5_cmdif_debugfs_init(dev); | |
1060 | ||
1061 | return 0; | |
1062 | ||
1063 | err_dbg: | |
1064 | clean_debug_files(dev); | |
1065 | return err; | |
1066 | } | |
1067 | ||
1068 | void mlx5_cmd_use_events(struct mlx5_core_dev *dev) | |
1069 | { | |
1070 | struct mlx5_cmd *cmd = &dev->cmd; | |
1071 | int i; | |
1072 | ||
1073 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1074 | down(&cmd->sem); | |
1075 | ||
1076 | down(&cmd->pages_sem); | |
1077 | ||
1078 | flush_workqueue(cmd->wq); | |
1079 | ||
1080 | cmd->mode = CMD_MODE_EVENTS; | |
1081 | ||
1082 | up(&cmd->pages_sem); | |
1083 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1084 | up(&cmd->sem); | |
1085 | } | |
1086 | ||
1087 | void mlx5_cmd_use_polling(struct mlx5_core_dev *dev) | |
1088 | { | |
1089 | struct mlx5_cmd *cmd = &dev->cmd; | |
1090 | int i; | |
1091 | ||
1092 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1093 | down(&cmd->sem); | |
1094 | ||
1095 | down(&cmd->pages_sem); | |
1096 | ||
1097 | flush_workqueue(cmd->wq); | |
1098 | cmd->mode = CMD_MODE_POLLING; | |
1099 | ||
1100 | up(&cmd->pages_sem); | |
1101 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1102 | up(&cmd->sem); | |
1103 | } | |
1104 | ||
1105 | void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, unsigned long vector) | |
1106 | { | |
1107 | struct mlx5_cmd *cmd = &dev->cmd; | |
1108 | struct mlx5_cmd_work_ent *ent; | |
1109 | mlx5_cmd_cbk_t callback; | |
1110 | void *context; | |
1111 | int err; | |
1112 | int i; | |
1113 | ||
1114 | for (i = 0; i < (1 << cmd->log_sz); i++) { | |
1115 | if (test_bit(i, &vector)) { | |
1116 | ent = cmd->ent_arr[i]; | |
1117 | ktime_get_ts(&ent->ts2); | |
1118 | memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out)); | |
1119 | dump_command(dev, ent, 0); | |
1120 | if (!ent->ret) { | |
1121 | if (!cmd->checksum_disabled) | |
1122 | ent->ret = verify_signature(ent); | |
1123 | else | |
1124 | ent->ret = 0; | |
1125 | ent->status = ent->lay->status_own >> 1; | |
1126 | mlx5_core_dbg(dev, "command completed. ret 0x%x, delivery status %s(0x%x)\n", | |
1127 | ent->ret, deliv_status_to_str(ent->status), ent->status); | |
1128 | } | |
1129 | free_ent(cmd, ent->idx); | |
1130 | if (ent->callback) { | |
1131 | callback = ent->callback; | |
1132 | context = ent->context; | |
1133 | err = ent->ret; | |
1134 | free_cmd(ent); | |
1135 | callback(err, context); | |
1136 | } else { | |
1137 | complete(&ent->done); | |
1138 | } | |
1139 | if (ent->page_queue) | |
1140 | up(&cmd->pages_sem); | |
1141 | else | |
1142 | up(&cmd->sem); | |
1143 | } | |
1144 | } | |
1145 | } | |
1146 | EXPORT_SYMBOL(mlx5_cmd_comp_handler); | |
1147 | ||
1148 | static int status_to_err(u8 status) | |
1149 | { | |
1150 | return status ? -1 : 0; /* TBD more meaningful codes */ | |
1151 | } | |
1152 | ||
1153 | static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size) | |
1154 | { | |
1155 | struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM); | |
1156 | struct mlx5_cmd *cmd = &dev->cmd; | |
1157 | struct cache_ent *ent = NULL; | |
1158 | ||
1159 | if (in_size > MED_LIST_SIZE && in_size <= LONG_LIST_SIZE) | |
1160 | ent = &cmd->cache.large; | |
1161 | else if (in_size > 16 && in_size <= MED_LIST_SIZE) | |
1162 | ent = &cmd->cache.med; | |
1163 | ||
1164 | if (ent) { | |
1165 | spin_lock(&ent->lock); | |
1166 | if (!list_empty(&ent->head)) { | |
1167 | msg = list_entry(ent->head.next, typeof(*msg), list); | |
1168 | /* For cached lists, we must explicitly state what is | |
1169 | * the real size | |
1170 | */ | |
1171 | msg->len = in_size; | |
1172 | list_del(&msg->list); | |
1173 | } | |
1174 | spin_unlock(&ent->lock); | |
1175 | } | |
1176 | ||
1177 | if (IS_ERR(msg)) | |
1178 | msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, in_size); | |
1179 | ||
1180 | return msg; | |
1181 | } | |
1182 | ||
1183 | static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg) | |
1184 | { | |
1185 | if (msg->cache) { | |
1186 | spin_lock(&msg->cache->lock); | |
1187 | list_add_tail(&msg->list, &msg->cache->head); | |
1188 | spin_unlock(&msg->cache->lock); | |
1189 | } else { | |
1190 | mlx5_free_cmd_msg(dev, msg); | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | static int is_manage_pages(struct mlx5_inbox_hdr *in) | |
1195 | { | |
1196 | return be16_to_cpu(in->opcode) == MLX5_CMD_OP_MANAGE_PAGES; | |
1197 | } | |
1198 | ||
1199 | int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out, | |
1200 | int out_size) | |
1201 | { | |
1202 | struct mlx5_cmd_msg *inb; | |
1203 | struct mlx5_cmd_msg *outb; | |
1204 | int pages_queue; | |
1205 | int err; | |
1206 | u8 status = 0; | |
1207 | ||
1208 | pages_queue = is_manage_pages(in); | |
1209 | ||
1210 | inb = alloc_msg(dev, in_size); | |
1211 | if (IS_ERR(inb)) { | |
1212 | err = PTR_ERR(inb); | |
1213 | return err; | |
1214 | } | |
1215 | ||
1216 | err = mlx5_copy_to_msg(inb, in, in_size); | |
1217 | if (err) { | |
1218 | mlx5_core_warn(dev, "err %d\n", err); | |
1219 | goto out_in; | |
1220 | } | |
1221 | ||
1222 | outb = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, out_size); | |
1223 | if (IS_ERR(outb)) { | |
1224 | err = PTR_ERR(outb); | |
1225 | goto out_in; | |
1226 | } | |
1227 | ||
1228 | err = mlx5_cmd_invoke(dev, inb, outb, NULL, NULL, pages_queue, &status); | |
1229 | if (err) | |
1230 | goto out_out; | |
1231 | ||
1232 | mlx5_core_dbg(dev, "err %d, status %d\n", err, status); | |
1233 | if (status) { | |
1234 | err = status_to_err(status); | |
1235 | goto out_out; | |
1236 | } | |
1237 | ||
1238 | err = mlx5_copy_from_msg(out, outb, out_size); | |
1239 | ||
1240 | out_out: | |
1241 | mlx5_free_cmd_msg(dev, outb); | |
1242 | ||
1243 | out_in: | |
1244 | free_msg(dev, inb); | |
1245 | return err; | |
1246 | } | |
1247 | EXPORT_SYMBOL(mlx5_cmd_exec); | |
1248 | ||
1249 | static void destroy_msg_cache(struct mlx5_core_dev *dev) | |
1250 | { | |
1251 | struct mlx5_cmd *cmd = &dev->cmd; | |
1252 | struct mlx5_cmd_msg *msg; | |
1253 | struct mlx5_cmd_msg *n; | |
1254 | ||
1255 | list_for_each_entry_safe(msg, n, &cmd->cache.large.head, list) { | |
1256 | list_del(&msg->list); | |
1257 | mlx5_free_cmd_msg(dev, msg); | |
1258 | } | |
1259 | ||
1260 | list_for_each_entry_safe(msg, n, &cmd->cache.med.head, list) { | |
1261 | list_del(&msg->list); | |
1262 | mlx5_free_cmd_msg(dev, msg); | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | static int create_msg_cache(struct mlx5_core_dev *dev) | |
1267 | { | |
1268 | struct mlx5_cmd *cmd = &dev->cmd; | |
1269 | struct mlx5_cmd_msg *msg; | |
1270 | int err; | |
1271 | int i; | |
1272 | ||
1273 | spin_lock_init(&cmd->cache.large.lock); | |
1274 | INIT_LIST_HEAD(&cmd->cache.large.head); | |
1275 | spin_lock_init(&cmd->cache.med.lock); | |
1276 | INIT_LIST_HEAD(&cmd->cache.med.head); | |
1277 | ||
1278 | for (i = 0; i < NUM_LONG_LISTS; i++) { | |
1279 | msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, LONG_LIST_SIZE); | |
1280 | if (IS_ERR(msg)) { | |
1281 | err = PTR_ERR(msg); | |
1282 | goto ex_err; | |
1283 | } | |
1284 | msg->cache = &cmd->cache.large; | |
1285 | list_add_tail(&msg->list, &cmd->cache.large.head); | |
1286 | } | |
1287 | ||
1288 | for (i = 0; i < NUM_MED_LISTS; i++) { | |
1289 | msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, MED_LIST_SIZE); | |
1290 | if (IS_ERR(msg)) { | |
1291 | err = PTR_ERR(msg); | |
1292 | goto ex_err; | |
1293 | } | |
1294 | msg->cache = &cmd->cache.med; | |
1295 | list_add_tail(&msg->list, &cmd->cache.med.head); | |
1296 | } | |
1297 | ||
1298 | return 0; | |
1299 | ||
1300 | ex_err: | |
1301 | destroy_msg_cache(dev); | |
1302 | return err; | |
1303 | } | |
1304 | ||
1305 | int mlx5_cmd_init(struct mlx5_core_dev *dev) | |
1306 | { | |
1307 | int size = sizeof(struct mlx5_cmd_prot_block); | |
1308 | int align = roundup_pow_of_two(size); | |
1309 | struct mlx5_cmd *cmd = &dev->cmd; | |
1310 | u32 cmd_h, cmd_l; | |
1311 | u16 cmd_if_rev; | |
1312 | int err; | |
1313 | int i; | |
1314 | ||
1315 | cmd_if_rev = cmdif_rev(dev); | |
1316 | if (cmd_if_rev != CMD_IF_REV) { | |
1317 | dev_err(&dev->pdev->dev, | |
1318 | "Driver cmdif rev(%d) differs from firmware's(%d)\n", | |
1319 | CMD_IF_REV, cmd_if_rev); | |
1320 | return -EINVAL; | |
1321 | } | |
1322 | ||
1323 | cmd->pool = pci_pool_create("mlx5_cmd", dev->pdev, size, align, 0); | |
1324 | if (!cmd->pool) | |
1325 | return -ENOMEM; | |
1326 | ||
1327 | cmd->cmd_buf = (void *)__get_free_pages(GFP_ATOMIC, 0); | |
1328 | if (!cmd->cmd_buf) { | |
1329 | err = -ENOMEM; | |
1330 | goto err_free_pool; | |
1331 | } | |
1332 | cmd->dma = dma_map_single(&dev->pdev->dev, cmd->cmd_buf, PAGE_SIZE, | |
1333 | DMA_BIDIRECTIONAL); | |
1334 | if (dma_mapping_error(&dev->pdev->dev, cmd->dma)) { | |
1335 | err = -ENOMEM; | |
1336 | goto err_free; | |
1337 | } | |
1338 | ||
1339 | cmd_l = ioread32be(&dev->iseg->cmdq_addr_l_sz) & 0xff; | |
1340 | cmd->log_sz = cmd_l >> 4 & 0xf; | |
1341 | cmd->log_stride = cmd_l & 0xf; | |
1342 | if (1 << cmd->log_sz > MLX5_MAX_COMMANDS) { | |
1343 | dev_err(&dev->pdev->dev, "firmware reports too many outstanding commands %d\n", | |
1344 | 1 << cmd->log_sz); | |
1345 | err = -EINVAL; | |
1346 | goto err_map; | |
1347 | } | |
1348 | ||
1349 | if (cmd->log_sz + cmd->log_stride > PAGE_SHIFT) { | |
1350 | dev_err(&dev->pdev->dev, "command queue size overflow\n"); | |
1351 | err = -EINVAL; | |
1352 | goto err_map; | |
1353 | } | |
1354 | ||
1355 | cmd->max_reg_cmds = (1 << cmd->log_sz) - 1; | |
1356 | cmd->bitmask = (1 << cmd->max_reg_cmds) - 1; | |
1357 | ||
1358 | cmd->cmdif_rev = ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16; | |
1359 | if (cmd->cmdif_rev > CMD_IF_REV) { | |
1360 | dev_err(&dev->pdev->dev, "driver does not support command interface version. driver %d, firmware %d\n", | |
1361 | CMD_IF_REV, cmd->cmdif_rev); | |
1362 | err = -ENOTSUPP; | |
1363 | goto err_map; | |
1364 | } | |
1365 | ||
1366 | spin_lock_init(&cmd->alloc_lock); | |
1367 | spin_lock_init(&cmd->token_lock); | |
1368 | for (i = 0; i < ARRAY_SIZE(cmd->stats); i++) | |
1369 | spin_lock_init(&cmd->stats[i].lock); | |
1370 | ||
1371 | sema_init(&cmd->sem, cmd->max_reg_cmds); | |
1372 | sema_init(&cmd->pages_sem, 1); | |
1373 | ||
1374 | cmd_h = (u32)((u64)(cmd->dma) >> 32); | |
1375 | cmd_l = (u32)(cmd->dma); | |
1376 | if (cmd_l & 0xfff) { | |
1377 | dev_err(&dev->pdev->dev, "invalid command queue address\n"); | |
1378 | err = -ENOMEM; | |
1379 | goto err_map; | |
1380 | } | |
1381 | ||
1382 | iowrite32be(cmd_h, &dev->iseg->cmdq_addr_h); | |
1383 | iowrite32be(cmd_l, &dev->iseg->cmdq_addr_l_sz); | |
1384 | ||
1385 | /* Make sure firmware sees the complete address before we proceed */ | |
1386 | wmb(); | |
1387 | ||
1388 | mlx5_core_dbg(dev, "descriptor at dma 0x%llx\n", (unsigned long long)(cmd->dma)); | |
1389 | ||
1390 | cmd->mode = CMD_MODE_POLLING; | |
1391 | ||
1392 | err = create_msg_cache(dev); | |
1393 | if (err) { | |
1394 | dev_err(&dev->pdev->dev, "failed to create command cache\n"); | |
1395 | goto err_map; | |
1396 | } | |
1397 | ||
1398 | set_wqname(dev); | |
1399 | cmd->wq = create_singlethread_workqueue(cmd->wq_name); | |
1400 | if (!cmd->wq) { | |
1401 | dev_err(&dev->pdev->dev, "failed to create command workqueue\n"); | |
1402 | err = -ENOMEM; | |
1403 | goto err_cache; | |
1404 | } | |
1405 | ||
1406 | err = create_debugfs_files(dev); | |
1407 | if (err) { | |
1408 | err = -ENOMEM; | |
1409 | goto err_wq; | |
1410 | } | |
1411 | ||
1412 | return 0; | |
1413 | ||
1414 | err_wq: | |
1415 | destroy_workqueue(cmd->wq); | |
1416 | ||
1417 | err_cache: | |
1418 | destroy_msg_cache(dev); | |
1419 | ||
1420 | err_map: | |
1421 | dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, | |
1422 | DMA_BIDIRECTIONAL); | |
1423 | err_free: | |
1424 | free_pages((unsigned long)cmd->cmd_buf, 0); | |
1425 | ||
1426 | err_free_pool: | |
1427 | pci_pool_destroy(cmd->pool); | |
1428 | ||
1429 | return err; | |
1430 | } | |
1431 | EXPORT_SYMBOL(mlx5_cmd_init); | |
1432 | ||
1433 | void mlx5_cmd_cleanup(struct mlx5_core_dev *dev) | |
1434 | { | |
1435 | struct mlx5_cmd *cmd = &dev->cmd; | |
1436 | ||
1437 | clean_debug_files(dev); | |
1438 | destroy_workqueue(cmd->wq); | |
1439 | destroy_msg_cache(dev); | |
1440 | dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, | |
1441 | DMA_BIDIRECTIONAL); | |
1442 | free_pages((unsigned long)cmd->cmd_buf, 0); | |
1443 | pci_pool_destroy(cmd->pool); | |
1444 | } | |
1445 | EXPORT_SYMBOL(mlx5_cmd_cleanup); | |
1446 | ||
1447 | static const char *cmd_status_str(u8 status) | |
1448 | { | |
1449 | switch (status) { | |
1450 | case MLX5_CMD_STAT_OK: | |
1451 | return "OK"; | |
1452 | case MLX5_CMD_STAT_INT_ERR: | |
1453 | return "internal error"; | |
1454 | case MLX5_CMD_STAT_BAD_OP_ERR: | |
1455 | return "bad operation"; | |
1456 | case MLX5_CMD_STAT_BAD_PARAM_ERR: | |
1457 | return "bad parameter"; | |
1458 | case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: | |
1459 | return "bad system state"; | |
1460 | case MLX5_CMD_STAT_BAD_RES_ERR: | |
1461 | return "bad resource"; | |
1462 | case MLX5_CMD_STAT_RES_BUSY: | |
1463 | return "resource busy"; | |
1464 | case MLX5_CMD_STAT_LIM_ERR: | |
1465 | return "limits exceeded"; | |
1466 | case MLX5_CMD_STAT_BAD_RES_STATE_ERR: | |
1467 | return "bad resource state"; | |
1468 | case MLX5_CMD_STAT_IX_ERR: | |
1469 | return "bad index"; | |
1470 | case MLX5_CMD_STAT_NO_RES_ERR: | |
1471 | return "no resources"; | |
1472 | case MLX5_CMD_STAT_BAD_INP_LEN_ERR: | |
1473 | return "bad input length"; | |
1474 | case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: | |
1475 | return "bad output length"; | |
1476 | case MLX5_CMD_STAT_BAD_QP_STATE_ERR: | |
1477 | return "bad QP state"; | |
1478 | case MLX5_CMD_STAT_BAD_PKT_ERR: | |
1479 | return "bad packet (discarded)"; | |
1480 | case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: | |
1481 | return "bad size too many outstanding CQEs"; | |
1482 | default: | |
1483 | return "unknown status"; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | int mlx5_cmd_status_to_err(struct mlx5_outbox_hdr *hdr) | |
1488 | { | |
1489 | if (!hdr->status) | |
1490 | return 0; | |
1491 | ||
1492 | pr_warn("command failed, status %s(0x%x), syndrome 0x%x\n", | |
1493 | cmd_status_str(hdr->status), hdr->status, | |
1494 | be32_to_cpu(hdr->syndrome)); | |
1495 | ||
1496 | switch (hdr->status) { | |
1497 | case MLX5_CMD_STAT_OK: return 0; | |
1498 | case MLX5_CMD_STAT_INT_ERR: return -EIO; | |
1499 | case MLX5_CMD_STAT_BAD_OP_ERR: return -EINVAL; | |
1500 | case MLX5_CMD_STAT_BAD_PARAM_ERR: return -EINVAL; | |
1501 | case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: return -EIO; | |
1502 | case MLX5_CMD_STAT_BAD_RES_ERR: return -EINVAL; | |
1503 | case MLX5_CMD_STAT_RES_BUSY: return -EBUSY; | |
1504 | case MLX5_CMD_STAT_LIM_ERR: return -EINVAL; | |
1505 | case MLX5_CMD_STAT_BAD_RES_STATE_ERR: return -EINVAL; | |
1506 | case MLX5_CMD_STAT_IX_ERR: return -EINVAL; | |
1507 | case MLX5_CMD_STAT_NO_RES_ERR: return -EAGAIN; | |
1508 | case MLX5_CMD_STAT_BAD_INP_LEN_ERR: return -EIO; | |
1509 | case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: return -EIO; | |
1510 | case MLX5_CMD_STAT_BAD_QP_STATE_ERR: return -EINVAL; | |
1511 | case MLX5_CMD_STAT_BAD_PKT_ERR: return -EINVAL; | |
1512 | case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: return -EINVAL; | |
1513 | default: return -EIO; | |
1514 | } | |
1515 | } |