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e126ba97 | 1 | /* |
302bdf68 | 2 | * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. |
e126ba97 EC |
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); | |
4cbdd27c AS |
128 | cmd->token++; |
129 | if (cmd->token == 0) | |
130 | cmd->token++; | |
131 | token = cmd->token; | |
e126ba97 EC |
132 | spin_unlock(&cmd->token_lock); |
133 | ||
134 | return token; | |
135 | } | |
136 | ||
137 | static int alloc_ent(struct mlx5_cmd *cmd) | |
138 | { | |
139 | unsigned long flags; | |
140 | int ret; | |
141 | ||
142 | spin_lock_irqsave(&cmd->alloc_lock, flags); | |
143 | ret = find_first_bit(&cmd->bitmask, cmd->max_reg_cmds); | |
144 | if (ret < cmd->max_reg_cmds) | |
145 | clear_bit(ret, &cmd->bitmask); | |
146 | spin_unlock_irqrestore(&cmd->alloc_lock, flags); | |
147 | ||
148 | return ret < cmd->max_reg_cmds ? ret : -ENOMEM; | |
149 | } | |
150 | ||
151 | static void free_ent(struct mlx5_cmd *cmd, int idx) | |
152 | { | |
153 | unsigned long flags; | |
154 | ||
155 | spin_lock_irqsave(&cmd->alloc_lock, flags); | |
156 | set_bit(idx, &cmd->bitmask); | |
157 | spin_unlock_irqrestore(&cmd->alloc_lock, flags); | |
158 | } | |
159 | ||
160 | static struct mlx5_cmd_layout *get_inst(struct mlx5_cmd *cmd, int idx) | |
161 | { | |
162 | return cmd->cmd_buf + (idx << cmd->log_stride); | |
163 | } | |
164 | ||
165 | static u8 xor8_buf(void *buf, int len) | |
166 | { | |
167 | u8 *ptr = buf; | |
168 | u8 sum = 0; | |
169 | int i; | |
170 | ||
171 | for (i = 0; i < len; i++) | |
172 | sum ^= ptr[i]; | |
173 | ||
174 | return sum; | |
175 | } | |
176 | ||
177 | static int verify_block_sig(struct mlx5_cmd_prot_block *block) | |
178 | { | |
179 | if (xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 1) != 0xff) | |
180 | return -EINVAL; | |
181 | ||
182 | if (xor8_buf(block, sizeof(*block)) != 0xff) | |
183 | return -EINVAL; | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
c1868b82 EC |
188 | static void calc_block_sig(struct mlx5_cmd_prot_block *block, u8 token, |
189 | int csum) | |
e126ba97 EC |
190 | { |
191 | block->token = token; | |
c1868b82 EC |
192 | if (csum) { |
193 | block->ctrl_sig = ~xor8_buf(block->rsvd0, sizeof(*block) - | |
194 | sizeof(block->data) - 2); | |
195 | block->sig = ~xor8_buf(block, sizeof(*block) - 1); | |
196 | } | |
e126ba97 EC |
197 | } |
198 | ||
c1868b82 | 199 | static void calc_chain_sig(struct mlx5_cmd_msg *msg, u8 token, int csum) |
e126ba97 EC |
200 | { |
201 | struct mlx5_cmd_mailbox *next = msg->next; | |
202 | ||
203 | while (next) { | |
c1868b82 | 204 | calc_block_sig(next->buf, token, csum); |
e126ba97 EC |
205 | next = next->next; |
206 | } | |
207 | } | |
208 | ||
c1868b82 | 209 | static void set_signature(struct mlx5_cmd_work_ent *ent, int csum) |
e126ba97 EC |
210 | { |
211 | ent->lay->sig = ~xor8_buf(ent->lay, sizeof(*ent->lay)); | |
c1868b82 EC |
212 | calc_chain_sig(ent->in, ent->token, csum); |
213 | calc_chain_sig(ent->out, ent->token, csum); | |
e126ba97 EC |
214 | } |
215 | ||
216 | static void poll_timeout(struct mlx5_cmd_work_ent *ent) | |
217 | { | |
218 | unsigned long poll_end = jiffies + msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC + 1000); | |
219 | u8 own; | |
220 | ||
221 | do { | |
222 | own = ent->lay->status_own; | |
223 | if (!(own & CMD_OWNER_HW)) { | |
224 | ent->ret = 0; | |
225 | return; | |
226 | } | |
227 | usleep_range(5000, 10000); | |
228 | } while (time_before(jiffies, poll_end)); | |
229 | ||
230 | ent->ret = -ETIMEDOUT; | |
231 | } | |
232 | ||
233 | static void free_cmd(struct mlx5_cmd_work_ent *ent) | |
234 | { | |
235 | kfree(ent); | |
236 | } | |
237 | ||
238 | ||
239 | static int verify_signature(struct mlx5_cmd_work_ent *ent) | |
240 | { | |
241 | struct mlx5_cmd_mailbox *next = ent->out->next; | |
242 | int err; | |
243 | u8 sig; | |
244 | ||
245 | sig = xor8_buf(ent->lay, sizeof(*ent->lay)); | |
246 | if (sig != 0xff) | |
247 | return -EINVAL; | |
248 | ||
249 | while (next) { | |
250 | err = verify_block_sig(next->buf); | |
251 | if (err) | |
252 | return err; | |
253 | ||
254 | next = next->next; | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | static void dump_buf(void *buf, int size, int data_only, int offset) | |
261 | { | |
262 | __be32 *p = buf; | |
263 | int i; | |
264 | ||
265 | for (i = 0; i < size; i += 16) { | |
266 | pr_debug("%03x: %08x %08x %08x %08x\n", offset, be32_to_cpu(p[0]), | |
267 | be32_to_cpu(p[1]), be32_to_cpu(p[2]), | |
268 | be32_to_cpu(p[3])); | |
269 | p += 4; | |
270 | offset += 16; | |
271 | } | |
272 | if (!data_only) | |
273 | pr_debug("\n"); | |
274 | } | |
275 | ||
276 | const char *mlx5_command_str(int command) | |
277 | { | |
278 | switch (command) { | |
279 | case MLX5_CMD_OP_QUERY_HCA_CAP: | |
280 | return "QUERY_HCA_CAP"; | |
281 | ||
282 | case MLX5_CMD_OP_SET_HCA_CAP: | |
283 | return "SET_HCA_CAP"; | |
284 | ||
285 | case MLX5_CMD_OP_QUERY_ADAPTER: | |
286 | return "QUERY_ADAPTER"; | |
287 | ||
288 | case MLX5_CMD_OP_INIT_HCA: | |
289 | return "INIT_HCA"; | |
290 | ||
291 | case MLX5_CMD_OP_TEARDOWN_HCA: | |
292 | return "TEARDOWN_HCA"; | |
293 | ||
cd23b14b EC |
294 | case MLX5_CMD_OP_ENABLE_HCA: |
295 | return "MLX5_CMD_OP_ENABLE_HCA"; | |
296 | ||
297 | case MLX5_CMD_OP_DISABLE_HCA: | |
298 | return "MLX5_CMD_OP_DISABLE_HCA"; | |
299 | ||
e126ba97 EC |
300 | case MLX5_CMD_OP_QUERY_PAGES: |
301 | return "QUERY_PAGES"; | |
302 | ||
303 | case MLX5_CMD_OP_MANAGE_PAGES: | |
304 | return "MANAGE_PAGES"; | |
305 | ||
306 | case MLX5_CMD_OP_CREATE_MKEY: | |
307 | return "CREATE_MKEY"; | |
308 | ||
309 | case MLX5_CMD_OP_QUERY_MKEY: | |
310 | return "QUERY_MKEY"; | |
311 | ||
312 | case MLX5_CMD_OP_DESTROY_MKEY: | |
313 | return "DESTROY_MKEY"; | |
314 | ||
315 | case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS: | |
316 | return "QUERY_SPECIAL_CONTEXTS"; | |
317 | ||
318 | case MLX5_CMD_OP_CREATE_EQ: | |
319 | return "CREATE_EQ"; | |
320 | ||
321 | case MLX5_CMD_OP_DESTROY_EQ: | |
322 | return "DESTROY_EQ"; | |
323 | ||
324 | case MLX5_CMD_OP_QUERY_EQ: | |
325 | return "QUERY_EQ"; | |
326 | ||
327 | case MLX5_CMD_OP_CREATE_CQ: | |
328 | return "CREATE_CQ"; | |
329 | ||
330 | case MLX5_CMD_OP_DESTROY_CQ: | |
331 | return "DESTROY_CQ"; | |
332 | ||
333 | case MLX5_CMD_OP_QUERY_CQ: | |
334 | return "QUERY_CQ"; | |
335 | ||
336 | case MLX5_CMD_OP_MODIFY_CQ: | |
337 | return "MODIFY_CQ"; | |
338 | ||
339 | case MLX5_CMD_OP_CREATE_QP: | |
340 | return "CREATE_QP"; | |
341 | ||
342 | case MLX5_CMD_OP_DESTROY_QP: | |
343 | return "DESTROY_QP"; | |
344 | ||
345 | case MLX5_CMD_OP_RST2INIT_QP: | |
346 | return "RST2INIT_QP"; | |
347 | ||
348 | case MLX5_CMD_OP_INIT2RTR_QP: | |
349 | return "INIT2RTR_QP"; | |
350 | ||
351 | case MLX5_CMD_OP_RTR2RTS_QP: | |
352 | return "RTR2RTS_QP"; | |
353 | ||
354 | case MLX5_CMD_OP_RTS2RTS_QP: | |
355 | return "RTS2RTS_QP"; | |
356 | ||
357 | case MLX5_CMD_OP_SQERR2RTS_QP: | |
358 | return "SQERR2RTS_QP"; | |
359 | ||
360 | case MLX5_CMD_OP_2ERR_QP: | |
361 | return "2ERR_QP"; | |
362 | ||
e126ba97 EC |
363 | case MLX5_CMD_OP_2RST_QP: |
364 | return "2RST_QP"; | |
365 | ||
366 | case MLX5_CMD_OP_QUERY_QP: | |
367 | return "QUERY_QP"; | |
368 | ||
e126ba97 EC |
369 | case MLX5_CMD_OP_MAD_IFC: |
370 | return "MAD_IFC"; | |
371 | ||
372 | case MLX5_CMD_OP_INIT2INIT_QP: | |
373 | return "INIT2INIT_QP"; | |
374 | ||
e126ba97 EC |
375 | case MLX5_CMD_OP_CREATE_PSV: |
376 | return "CREATE_PSV"; | |
377 | ||
378 | case MLX5_CMD_OP_DESTROY_PSV: | |
379 | return "DESTROY_PSV"; | |
380 | ||
e126ba97 EC |
381 | case MLX5_CMD_OP_CREATE_SRQ: |
382 | return "CREATE_SRQ"; | |
383 | ||
384 | case MLX5_CMD_OP_DESTROY_SRQ: | |
385 | return "DESTROY_SRQ"; | |
386 | ||
387 | case MLX5_CMD_OP_QUERY_SRQ: | |
388 | return "QUERY_SRQ"; | |
389 | ||
390 | case MLX5_CMD_OP_ARM_RQ: | |
391 | return "ARM_RQ"; | |
392 | ||
393 | case MLX5_CMD_OP_RESIZE_SRQ: | |
394 | return "RESIZE_SRQ"; | |
395 | ||
396 | case MLX5_CMD_OP_ALLOC_PD: | |
397 | return "ALLOC_PD"; | |
398 | ||
399 | case MLX5_CMD_OP_DEALLOC_PD: | |
400 | return "DEALLOC_PD"; | |
401 | ||
402 | case MLX5_CMD_OP_ALLOC_UAR: | |
403 | return "ALLOC_UAR"; | |
404 | ||
405 | case MLX5_CMD_OP_DEALLOC_UAR: | |
406 | return "DEALLOC_UAR"; | |
407 | ||
408 | case MLX5_CMD_OP_ATTACH_TO_MCG: | |
409 | return "ATTACH_TO_MCG"; | |
410 | ||
411 | case MLX5_CMD_OP_DETACH_FROM_MCG: | |
412 | return "DETACH_FROM_MCG"; | |
413 | ||
414 | case MLX5_CMD_OP_ALLOC_XRCD: | |
415 | return "ALLOC_XRCD"; | |
416 | ||
417 | case MLX5_CMD_OP_DEALLOC_XRCD: | |
418 | return "DEALLOC_XRCD"; | |
419 | ||
420 | case MLX5_CMD_OP_ACCESS_REG: | |
421 | return "MLX5_CMD_OP_ACCESS_REG"; | |
422 | ||
423 | default: return "unknown command opcode"; | |
424 | } | |
425 | } | |
426 | ||
427 | static void dump_command(struct mlx5_core_dev *dev, | |
428 | struct mlx5_cmd_work_ent *ent, int input) | |
429 | { | |
430 | u16 op = be16_to_cpu(((struct mlx5_inbox_hdr *)(ent->lay->in))->opcode); | |
431 | struct mlx5_cmd_msg *msg = input ? ent->in : ent->out; | |
432 | struct mlx5_cmd_mailbox *next = msg->next; | |
433 | int data_only; | |
f241e749 | 434 | u32 offset = 0; |
e126ba97 EC |
435 | int dump_len; |
436 | ||
437 | data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA)); | |
438 | ||
439 | if (data_only) | |
440 | mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA, | |
441 | "dump command data %s(0x%x) %s\n", | |
442 | mlx5_command_str(op), op, | |
443 | input ? "INPUT" : "OUTPUT"); | |
444 | else | |
445 | mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n", | |
446 | mlx5_command_str(op), op, | |
447 | input ? "INPUT" : "OUTPUT"); | |
448 | ||
449 | if (data_only) { | |
450 | if (input) { | |
451 | dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset); | |
452 | offset += sizeof(ent->lay->in); | |
453 | } else { | |
454 | dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset); | |
455 | offset += sizeof(ent->lay->out); | |
456 | } | |
457 | } else { | |
458 | dump_buf(ent->lay, sizeof(*ent->lay), 0, offset); | |
459 | offset += sizeof(*ent->lay); | |
460 | } | |
461 | ||
462 | while (next && offset < msg->len) { | |
463 | if (data_only) { | |
464 | dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset); | |
465 | dump_buf(next->buf, dump_len, 1, offset); | |
466 | offset += MLX5_CMD_DATA_BLOCK_SIZE; | |
467 | } else { | |
468 | mlx5_core_dbg(dev, "command block:\n"); | |
469 | dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset); | |
470 | offset += sizeof(struct mlx5_cmd_prot_block); | |
471 | } | |
472 | next = next->next; | |
473 | } | |
474 | ||
475 | if (data_only) | |
476 | pr_debug("\n"); | |
477 | } | |
478 | ||
479 | static void cmd_work_handler(struct work_struct *work) | |
480 | { | |
481 | struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work); | |
482 | struct mlx5_cmd *cmd = ent->cmd; | |
483 | struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev, cmd); | |
484 | struct mlx5_cmd_layout *lay; | |
485 | struct semaphore *sem; | |
486 | ||
487 | sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem; | |
488 | down(sem); | |
489 | if (!ent->page_queue) { | |
490 | ent->idx = alloc_ent(cmd); | |
491 | if (ent->idx < 0) { | |
492 | mlx5_core_err(dev, "failed to allocate command entry\n"); | |
493 | up(sem); | |
494 | return; | |
495 | } | |
496 | } else { | |
497 | ent->idx = cmd->max_reg_cmds; | |
498 | } | |
499 | ||
500 | ent->token = alloc_token(cmd); | |
501 | cmd->ent_arr[ent->idx] = ent; | |
502 | lay = get_inst(cmd, ent->idx); | |
503 | ent->lay = lay; | |
504 | memset(lay, 0, sizeof(*lay)); | |
505 | memcpy(lay->in, ent->in->first.data, sizeof(lay->in)); | |
746b5583 | 506 | ent->op = be32_to_cpu(lay->in[0]) >> 16; |
e126ba97 EC |
507 | if (ent->in->next) |
508 | lay->in_ptr = cpu_to_be64(ent->in->next->dma); | |
509 | lay->inlen = cpu_to_be32(ent->in->len); | |
510 | if (ent->out->next) | |
511 | lay->out_ptr = cpu_to_be64(ent->out->next->dma); | |
512 | lay->outlen = cpu_to_be32(ent->out->len); | |
513 | lay->type = MLX5_PCI_CMD_XPORT; | |
514 | lay->token = ent->token; | |
515 | lay->status_own = CMD_OWNER_HW; | |
c1868b82 | 516 | set_signature(ent, !cmd->checksum_disabled); |
e126ba97 | 517 | dump_command(dev, ent, 1); |
14a70046 | 518 | ent->ts1 = ktime_get_ns(); |
e126ba97 EC |
519 | |
520 | /* ring doorbell after the descriptor is valid */ | |
21db5074 | 521 | mlx5_core_dbg(dev, "writing 0x%x to command doorbell\n", 1 << ent->idx); |
e126ba97 EC |
522 | wmb(); |
523 | iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell); | |
e126ba97 | 524 | mmiowb(); |
21db5074 | 525 | /* if not in polling don't use ent after this point */ |
e126ba97 EC |
526 | if (cmd->mode == CMD_MODE_POLLING) { |
527 | poll_timeout(ent); | |
528 | /* make sure we read the descriptor after ownership is SW */ | |
529 | rmb(); | |
530 | mlx5_cmd_comp_handler(dev, 1UL << ent->idx); | |
531 | } | |
532 | } | |
533 | ||
534 | static const char *deliv_status_to_str(u8 status) | |
535 | { | |
536 | switch (status) { | |
537 | case MLX5_CMD_DELIVERY_STAT_OK: | |
538 | return "no errors"; | |
539 | case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR: | |
540 | return "signature error"; | |
541 | case MLX5_CMD_DELIVERY_STAT_TOK_ERR: | |
542 | return "token error"; | |
543 | case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR: | |
544 | return "bad block number"; | |
545 | case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR: | |
546 | return "output pointer not aligned to block size"; | |
547 | case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR: | |
548 | return "input pointer not aligned to block size"; | |
549 | case MLX5_CMD_DELIVERY_STAT_FW_ERR: | |
550 | return "firmware internal error"; | |
551 | case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR: | |
552 | return "command input length error"; | |
553 | case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR: | |
554 | return "command ouput length error"; | |
555 | case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR: | |
556 | return "reserved fields not cleared"; | |
557 | case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR: | |
558 | return "bad command descriptor type"; | |
559 | default: | |
560 | return "unknown status code"; | |
561 | } | |
562 | } | |
563 | ||
564 | static u16 msg_to_opcode(struct mlx5_cmd_msg *in) | |
565 | { | |
566 | struct mlx5_inbox_hdr *hdr = (struct mlx5_inbox_hdr *)(in->first.data); | |
567 | ||
568 | return be16_to_cpu(hdr->opcode); | |
569 | } | |
570 | ||
571 | static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent) | |
572 | { | |
573 | unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC); | |
574 | struct mlx5_cmd *cmd = &dev->cmd; | |
575 | int err; | |
576 | ||
577 | if (cmd->mode == CMD_MODE_POLLING) { | |
578 | wait_for_completion(&ent->done); | |
579 | err = ent->ret; | |
580 | } else { | |
581 | if (!wait_for_completion_timeout(&ent->done, timeout)) | |
582 | err = -ETIMEDOUT; | |
583 | else | |
584 | err = 0; | |
585 | } | |
586 | if (err == -ETIMEDOUT) { | |
587 | mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n", | |
588 | mlx5_command_str(msg_to_opcode(ent->in)), | |
589 | msg_to_opcode(ent->in)); | |
590 | } | |
1a91de28 JP |
591 | mlx5_core_dbg(dev, "err %d, delivery status %s(%d)\n", |
592 | err, deliv_status_to_str(ent->status), ent->status); | |
e126ba97 EC |
593 | |
594 | return err; | |
595 | } | |
596 | ||
597 | /* Notes: | |
598 | * 1. Callback functions may not sleep | |
599 | * 2. page queue commands do not support asynchrous completion | |
600 | */ | |
601 | static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in, | |
746b5583 EC |
602 | struct mlx5_cmd_msg *out, void *uout, int uout_size, |
603 | mlx5_cmd_cbk_t callback, | |
e126ba97 EC |
604 | void *context, int page_queue, u8 *status) |
605 | { | |
606 | struct mlx5_cmd *cmd = &dev->cmd; | |
607 | struct mlx5_cmd_work_ent *ent; | |
e126ba97 EC |
608 | struct mlx5_cmd_stats *stats; |
609 | int err = 0; | |
610 | s64 ds; | |
611 | u16 op; | |
612 | ||
613 | if (callback && page_queue) | |
614 | return -EINVAL; | |
615 | ||
746b5583 EC |
616 | ent = alloc_cmd(cmd, in, out, uout, uout_size, callback, context, |
617 | page_queue); | |
e126ba97 EC |
618 | if (IS_ERR(ent)) |
619 | return PTR_ERR(ent); | |
620 | ||
621 | if (!callback) | |
622 | init_completion(&ent->done); | |
623 | ||
624 | INIT_WORK(&ent->work, cmd_work_handler); | |
625 | if (page_queue) { | |
626 | cmd_work_handler(&ent->work); | |
627 | } else if (!queue_work(cmd->wq, &ent->work)) { | |
628 | mlx5_core_warn(dev, "failed to queue work\n"); | |
629 | err = -ENOMEM; | |
630 | goto out_free; | |
631 | } | |
632 | ||
633 | if (!callback) { | |
634 | err = wait_func(dev, ent); | |
635 | if (err == -ETIMEDOUT) | |
636 | goto out; | |
637 | ||
14a70046 | 638 | ds = ent->ts2 - ent->ts1; |
e126ba97 EC |
639 | op = be16_to_cpu(((struct mlx5_inbox_hdr *)in->first.data)->opcode); |
640 | if (op < ARRAY_SIZE(cmd->stats)) { | |
641 | stats = &cmd->stats[op]; | |
746b5583 | 642 | spin_lock_irq(&stats->lock); |
e126ba97 EC |
643 | stats->sum += ds; |
644 | ++stats->n; | |
746b5583 | 645 | spin_unlock_irq(&stats->lock); |
e126ba97 EC |
646 | } |
647 | mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME, | |
648 | "fw exec time for %s is %lld nsec\n", | |
649 | mlx5_command_str(op), ds); | |
650 | *status = ent->status; | |
651 | free_cmd(ent); | |
652 | } | |
653 | ||
654 | return err; | |
655 | ||
656 | out_free: | |
657 | free_cmd(ent); | |
658 | out: | |
659 | return err; | |
660 | } | |
661 | ||
662 | static ssize_t dbg_write(struct file *filp, const char __user *buf, | |
663 | size_t count, loff_t *pos) | |
664 | { | |
665 | struct mlx5_core_dev *dev = filp->private_data; | |
666 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
667 | char lbuf[3]; | |
668 | int err; | |
669 | ||
670 | if (!dbg->in_msg || !dbg->out_msg) | |
671 | return -ENOMEM; | |
672 | ||
673 | if (copy_from_user(lbuf, buf, sizeof(lbuf))) | |
5e631a03 | 674 | return -EFAULT; |
e126ba97 EC |
675 | |
676 | lbuf[sizeof(lbuf) - 1] = 0; | |
677 | ||
678 | if (strcmp(lbuf, "go")) | |
679 | return -EINVAL; | |
680 | ||
681 | err = mlx5_cmd_exec(dev, dbg->in_msg, dbg->inlen, dbg->out_msg, dbg->outlen); | |
682 | ||
683 | return err ? err : count; | |
684 | } | |
685 | ||
686 | ||
687 | static const struct file_operations fops = { | |
688 | .owner = THIS_MODULE, | |
689 | .open = simple_open, | |
690 | .write = dbg_write, | |
691 | }; | |
692 | ||
693 | static int mlx5_copy_to_msg(struct mlx5_cmd_msg *to, void *from, int size) | |
694 | { | |
695 | struct mlx5_cmd_prot_block *block; | |
696 | struct mlx5_cmd_mailbox *next; | |
697 | int copy; | |
698 | ||
699 | if (!to || !from) | |
700 | return -ENOMEM; | |
701 | ||
702 | copy = min_t(int, size, sizeof(to->first.data)); | |
703 | memcpy(to->first.data, from, copy); | |
704 | size -= copy; | |
705 | from += copy; | |
706 | ||
707 | next = to->next; | |
708 | while (size) { | |
709 | if (!next) { | |
710 | /* this is a BUG */ | |
711 | return -ENOMEM; | |
712 | } | |
713 | ||
714 | copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); | |
715 | block = next->buf; | |
716 | memcpy(block->data, from, copy); | |
717 | from += copy; | |
718 | size -= copy; | |
719 | next = next->next; | |
720 | } | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *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(from->first.data)); | |
735 | memcpy(to, from->first.data, copy); | |
736 | size -= copy; | |
737 | to += copy; | |
738 | ||
739 | next = from->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; | |
e126ba97 EC |
748 | |
749 | memcpy(to, block->data, copy); | |
750 | to += copy; | |
751 | size -= copy; | |
752 | next = next->next; | |
753 | } | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
758 | static struct mlx5_cmd_mailbox *alloc_cmd_box(struct mlx5_core_dev *dev, | |
759 | gfp_t flags) | |
760 | { | |
761 | struct mlx5_cmd_mailbox *mailbox; | |
762 | ||
763 | mailbox = kmalloc(sizeof(*mailbox), flags); | |
764 | if (!mailbox) | |
765 | return ERR_PTR(-ENOMEM); | |
766 | ||
767 | mailbox->buf = pci_pool_alloc(dev->cmd.pool, flags, | |
768 | &mailbox->dma); | |
769 | if (!mailbox->buf) { | |
770 | mlx5_core_dbg(dev, "failed allocation\n"); | |
771 | kfree(mailbox); | |
772 | return ERR_PTR(-ENOMEM); | |
773 | } | |
774 | memset(mailbox->buf, 0, sizeof(struct mlx5_cmd_prot_block)); | |
775 | mailbox->next = NULL; | |
776 | ||
777 | return mailbox; | |
778 | } | |
779 | ||
780 | static void free_cmd_box(struct mlx5_core_dev *dev, | |
781 | struct mlx5_cmd_mailbox *mailbox) | |
782 | { | |
783 | pci_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma); | |
784 | kfree(mailbox); | |
785 | } | |
786 | ||
787 | static struct mlx5_cmd_msg *mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev, | |
788 | gfp_t flags, int size) | |
789 | { | |
790 | struct mlx5_cmd_mailbox *tmp, *head = NULL; | |
791 | struct mlx5_cmd_prot_block *block; | |
792 | struct mlx5_cmd_msg *msg; | |
793 | int blen; | |
794 | int err; | |
795 | int n; | |
796 | int i; | |
797 | ||
746b5583 | 798 | msg = kzalloc(sizeof(*msg), flags); |
e126ba97 EC |
799 | if (!msg) |
800 | return ERR_PTR(-ENOMEM); | |
801 | ||
802 | blen = size - min_t(int, sizeof(msg->first.data), size); | |
803 | n = (blen + MLX5_CMD_DATA_BLOCK_SIZE - 1) / MLX5_CMD_DATA_BLOCK_SIZE; | |
804 | ||
805 | for (i = 0; i < n; i++) { | |
806 | tmp = alloc_cmd_box(dev, flags); | |
807 | if (IS_ERR(tmp)) { | |
808 | mlx5_core_warn(dev, "failed allocating block\n"); | |
809 | err = PTR_ERR(tmp); | |
810 | goto err_alloc; | |
811 | } | |
812 | ||
813 | block = tmp->buf; | |
814 | tmp->next = head; | |
815 | block->next = cpu_to_be64(tmp->next ? tmp->next->dma : 0); | |
816 | block->block_num = cpu_to_be32(n - i - 1); | |
817 | head = tmp; | |
818 | } | |
819 | msg->next = head; | |
820 | msg->len = size; | |
821 | return msg; | |
822 | ||
823 | err_alloc: | |
824 | while (head) { | |
825 | tmp = head->next; | |
826 | free_cmd_box(dev, head); | |
827 | head = tmp; | |
828 | } | |
829 | kfree(msg); | |
830 | ||
831 | return ERR_PTR(err); | |
832 | } | |
833 | ||
834 | static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev, | |
835 | struct mlx5_cmd_msg *msg) | |
836 | { | |
837 | struct mlx5_cmd_mailbox *head = msg->next; | |
838 | struct mlx5_cmd_mailbox *next; | |
839 | ||
840 | while (head) { | |
841 | next = head->next; | |
842 | free_cmd_box(dev, head); | |
843 | head = next; | |
844 | } | |
845 | kfree(msg); | |
846 | } | |
847 | ||
848 | static ssize_t data_write(struct file *filp, const char __user *buf, | |
849 | size_t count, loff_t *pos) | |
850 | { | |
851 | struct mlx5_core_dev *dev = filp->private_data; | |
852 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
853 | void *ptr; | |
854 | int err; | |
855 | ||
856 | if (*pos != 0) | |
857 | return -EINVAL; | |
858 | ||
859 | kfree(dbg->in_msg); | |
860 | dbg->in_msg = NULL; | |
861 | dbg->inlen = 0; | |
862 | ||
863 | ptr = kzalloc(count, GFP_KERNEL); | |
864 | if (!ptr) | |
865 | return -ENOMEM; | |
866 | ||
867 | if (copy_from_user(ptr, buf, count)) { | |
5e631a03 | 868 | err = -EFAULT; |
e126ba97 EC |
869 | goto out; |
870 | } | |
871 | dbg->in_msg = ptr; | |
872 | dbg->inlen = count; | |
873 | ||
874 | *pos = count; | |
875 | ||
876 | return count; | |
877 | ||
878 | out: | |
879 | kfree(ptr); | |
880 | return err; | |
881 | } | |
882 | ||
883 | static ssize_t data_read(struct file *filp, char __user *buf, size_t count, | |
884 | loff_t *pos) | |
885 | { | |
886 | struct mlx5_core_dev *dev = filp->private_data; | |
887 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
888 | int copy; | |
889 | ||
890 | if (*pos) | |
891 | return 0; | |
892 | ||
893 | if (!dbg->out_msg) | |
894 | return -ENOMEM; | |
895 | ||
896 | copy = min_t(int, count, dbg->outlen); | |
897 | if (copy_to_user(buf, dbg->out_msg, copy)) | |
5e631a03 | 898 | return -EFAULT; |
e126ba97 EC |
899 | |
900 | *pos += copy; | |
901 | ||
902 | return copy; | |
903 | } | |
904 | ||
905 | static const struct file_operations dfops = { | |
906 | .owner = THIS_MODULE, | |
907 | .open = simple_open, | |
908 | .write = data_write, | |
909 | .read = data_read, | |
910 | }; | |
911 | ||
912 | static ssize_t outlen_read(struct file *filp, char __user *buf, size_t count, | |
913 | loff_t *pos) | |
914 | { | |
915 | struct mlx5_core_dev *dev = filp->private_data; | |
916 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
917 | char outlen[8]; | |
918 | int err; | |
919 | ||
920 | if (*pos) | |
921 | return 0; | |
922 | ||
923 | err = snprintf(outlen, sizeof(outlen), "%d", dbg->outlen); | |
924 | if (err < 0) | |
925 | return err; | |
926 | ||
927 | if (copy_to_user(buf, &outlen, err)) | |
5e631a03 | 928 | return -EFAULT; |
e126ba97 EC |
929 | |
930 | *pos += err; | |
931 | ||
932 | return err; | |
933 | } | |
934 | ||
935 | static ssize_t outlen_write(struct file *filp, const char __user *buf, | |
936 | size_t count, loff_t *pos) | |
937 | { | |
938 | struct mlx5_core_dev *dev = filp->private_data; | |
939 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
940 | char outlen_str[8]; | |
941 | int outlen; | |
942 | void *ptr; | |
943 | int err; | |
944 | ||
945 | if (*pos != 0 || count > 6) | |
946 | return -EINVAL; | |
947 | ||
948 | kfree(dbg->out_msg); | |
949 | dbg->out_msg = NULL; | |
950 | dbg->outlen = 0; | |
951 | ||
952 | if (copy_from_user(outlen_str, buf, count)) | |
5e631a03 | 953 | return -EFAULT; |
e126ba97 EC |
954 | |
955 | outlen_str[7] = 0; | |
956 | ||
957 | err = sscanf(outlen_str, "%d", &outlen); | |
958 | if (err < 0) | |
959 | return err; | |
960 | ||
961 | ptr = kzalloc(outlen, GFP_KERNEL); | |
962 | if (!ptr) | |
963 | return -ENOMEM; | |
964 | ||
965 | dbg->out_msg = ptr; | |
966 | dbg->outlen = outlen; | |
967 | ||
968 | *pos = count; | |
969 | ||
970 | return count; | |
971 | } | |
972 | ||
973 | static const struct file_operations olfops = { | |
974 | .owner = THIS_MODULE, | |
975 | .open = simple_open, | |
976 | .write = outlen_write, | |
977 | .read = outlen_read, | |
978 | }; | |
979 | ||
980 | static void set_wqname(struct mlx5_core_dev *dev) | |
981 | { | |
982 | struct mlx5_cmd *cmd = &dev->cmd; | |
983 | ||
984 | snprintf(cmd->wq_name, sizeof(cmd->wq_name), "mlx5_cmd_%s", | |
985 | dev_name(&dev->pdev->dev)); | |
986 | } | |
987 | ||
988 | static void clean_debug_files(struct mlx5_core_dev *dev) | |
989 | { | |
990 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
991 | ||
992 | if (!mlx5_debugfs_root) | |
993 | return; | |
994 | ||
995 | mlx5_cmdif_debugfs_cleanup(dev); | |
996 | debugfs_remove_recursive(dbg->dbg_root); | |
997 | } | |
998 | ||
999 | static int create_debugfs_files(struct mlx5_core_dev *dev) | |
1000 | { | |
1001 | struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; | |
1002 | int err = -ENOMEM; | |
1003 | ||
1004 | if (!mlx5_debugfs_root) | |
1005 | return 0; | |
1006 | ||
1007 | dbg->dbg_root = debugfs_create_dir("cmd", dev->priv.dbg_root); | |
1008 | if (!dbg->dbg_root) | |
1009 | return err; | |
1010 | ||
1011 | dbg->dbg_in = debugfs_create_file("in", 0400, dbg->dbg_root, | |
1012 | dev, &dfops); | |
1013 | if (!dbg->dbg_in) | |
1014 | goto err_dbg; | |
1015 | ||
1016 | dbg->dbg_out = debugfs_create_file("out", 0200, dbg->dbg_root, | |
1017 | dev, &dfops); | |
1018 | if (!dbg->dbg_out) | |
1019 | goto err_dbg; | |
1020 | ||
1021 | dbg->dbg_outlen = debugfs_create_file("out_len", 0600, dbg->dbg_root, | |
1022 | dev, &olfops); | |
1023 | if (!dbg->dbg_outlen) | |
1024 | goto err_dbg; | |
1025 | ||
1026 | dbg->dbg_status = debugfs_create_u8("status", 0600, dbg->dbg_root, | |
1027 | &dbg->status); | |
1028 | if (!dbg->dbg_status) | |
1029 | goto err_dbg; | |
1030 | ||
1031 | dbg->dbg_run = debugfs_create_file("run", 0200, dbg->dbg_root, dev, &fops); | |
1032 | if (!dbg->dbg_run) | |
1033 | goto err_dbg; | |
1034 | ||
1035 | mlx5_cmdif_debugfs_init(dev); | |
1036 | ||
1037 | return 0; | |
1038 | ||
1039 | err_dbg: | |
1040 | clean_debug_files(dev); | |
1041 | return err; | |
1042 | } | |
1043 | ||
1044 | void mlx5_cmd_use_events(struct mlx5_core_dev *dev) | |
1045 | { | |
1046 | struct mlx5_cmd *cmd = &dev->cmd; | |
1047 | int i; | |
1048 | ||
1049 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1050 | down(&cmd->sem); | |
1051 | ||
1052 | down(&cmd->pages_sem); | |
1053 | ||
1054 | flush_workqueue(cmd->wq); | |
1055 | ||
1056 | cmd->mode = CMD_MODE_EVENTS; | |
1057 | ||
1058 | up(&cmd->pages_sem); | |
1059 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1060 | up(&cmd->sem); | |
1061 | } | |
1062 | ||
1063 | void mlx5_cmd_use_polling(struct mlx5_core_dev *dev) | |
1064 | { | |
1065 | struct mlx5_cmd *cmd = &dev->cmd; | |
1066 | int i; | |
1067 | ||
1068 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1069 | down(&cmd->sem); | |
1070 | ||
1071 | down(&cmd->pages_sem); | |
1072 | ||
1073 | flush_workqueue(cmd->wq); | |
1074 | cmd->mode = CMD_MODE_POLLING; | |
1075 | ||
1076 | up(&cmd->pages_sem); | |
1077 | for (i = 0; i < cmd->max_reg_cmds; i++) | |
1078 | up(&cmd->sem); | |
1079 | } | |
1080 | ||
746b5583 EC |
1081 | static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg) |
1082 | { | |
1083 | unsigned long flags; | |
1084 | ||
1085 | if (msg->cache) { | |
1086 | spin_lock_irqsave(&msg->cache->lock, flags); | |
1087 | list_add_tail(&msg->list, &msg->cache->head); | |
1088 | spin_unlock_irqrestore(&msg->cache->lock, flags); | |
1089 | } else { | |
1090 | mlx5_free_cmd_msg(dev, msg); | |
1091 | } | |
1092 | } | |
1093 | ||
e126ba97 EC |
1094 | void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, unsigned long vector) |
1095 | { | |
1096 | struct mlx5_cmd *cmd = &dev->cmd; | |
1097 | struct mlx5_cmd_work_ent *ent; | |
1098 | mlx5_cmd_cbk_t callback; | |
1099 | void *context; | |
1100 | int err; | |
1101 | int i; | |
746b5583 EC |
1102 | s64 ds; |
1103 | struct mlx5_cmd_stats *stats; | |
1104 | unsigned long flags; | |
e126ba97 EC |
1105 | |
1106 | for (i = 0; i < (1 << cmd->log_sz); i++) { | |
1107 | if (test_bit(i, &vector)) { | |
11940c87 DC |
1108 | struct semaphore *sem; |
1109 | ||
e126ba97 | 1110 | ent = cmd->ent_arr[i]; |
11940c87 DC |
1111 | if (ent->page_queue) |
1112 | sem = &cmd->pages_sem; | |
1113 | else | |
1114 | sem = &cmd->sem; | |
14a70046 | 1115 | ent->ts2 = ktime_get_ns(); |
e126ba97 EC |
1116 | memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out)); |
1117 | dump_command(dev, ent, 0); | |
1118 | if (!ent->ret) { | |
1119 | if (!cmd->checksum_disabled) | |
1120 | ent->ret = verify_signature(ent); | |
1121 | else | |
1122 | ent->ret = 0; | |
1123 | ent->status = ent->lay->status_own >> 1; | |
1124 | mlx5_core_dbg(dev, "command completed. ret 0x%x, delivery status %s(0x%x)\n", | |
1125 | ent->ret, deliv_status_to_str(ent->status), ent->status); | |
1126 | } | |
1127 | free_ent(cmd, ent->idx); | |
1128 | if (ent->callback) { | |
14a70046 | 1129 | ds = ent->ts2 - ent->ts1; |
746b5583 EC |
1130 | if (ent->op < ARRAY_SIZE(cmd->stats)) { |
1131 | stats = &cmd->stats[ent->op]; | |
1132 | spin_lock_irqsave(&stats->lock, flags); | |
1133 | stats->sum += ds; | |
1134 | ++stats->n; | |
1135 | spin_unlock_irqrestore(&stats->lock, flags); | |
1136 | } | |
1137 | ||
e126ba97 EC |
1138 | callback = ent->callback; |
1139 | context = ent->context; | |
1140 | err = ent->ret; | |
746b5583 EC |
1141 | if (!err) |
1142 | err = mlx5_copy_from_msg(ent->uout, | |
1143 | ent->out, | |
1144 | ent->uout_size); | |
1145 | ||
1146 | mlx5_free_cmd_msg(dev, ent->out); | |
1147 | free_msg(dev, ent->in); | |
1148 | ||
e126ba97 EC |
1149 | free_cmd(ent); |
1150 | callback(err, context); | |
1151 | } else { | |
1152 | complete(&ent->done); | |
1153 | } | |
11940c87 | 1154 | up(sem); |
e126ba97 EC |
1155 | } |
1156 | } | |
1157 | } | |
1158 | EXPORT_SYMBOL(mlx5_cmd_comp_handler); | |
1159 | ||
1160 | static int status_to_err(u8 status) | |
1161 | { | |
1162 | return status ? -1 : 0; /* TBD more meaningful codes */ | |
1163 | } | |
1164 | ||
746b5583 EC |
1165 | static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size, |
1166 | gfp_t gfp) | |
e126ba97 EC |
1167 | { |
1168 | struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM); | |
1169 | struct mlx5_cmd *cmd = &dev->cmd; | |
1170 | struct cache_ent *ent = NULL; | |
1171 | ||
1172 | if (in_size > MED_LIST_SIZE && in_size <= LONG_LIST_SIZE) | |
1173 | ent = &cmd->cache.large; | |
1174 | else if (in_size > 16 && in_size <= MED_LIST_SIZE) | |
1175 | ent = &cmd->cache.med; | |
1176 | ||
1177 | if (ent) { | |
746b5583 | 1178 | spin_lock_irq(&ent->lock); |
e126ba97 EC |
1179 | if (!list_empty(&ent->head)) { |
1180 | msg = list_entry(ent->head.next, typeof(*msg), list); | |
1181 | /* For cached lists, we must explicitly state what is | |
1182 | * the real size | |
1183 | */ | |
1184 | msg->len = in_size; | |
1185 | list_del(&msg->list); | |
1186 | } | |
746b5583 | 1187 | spin_unlock_irq(&ent->lock); |
e126ba97 EC |
1188 | } |
1189 | ||
1190 | if (IS_ERR(msg)) | |
746b5583 | 1191 | msg = mlx5_alloc_cmd_msg(dev, gfp, in_size); |
e126ba97 EC |
1192 | |
1193 | return msg; | |
1194 | } | |
1195 | ||
e126ba97 EC |
1196 | static int is_manage_pages(struct mlx5_inbox_hdr *in) |
1197 | { | |
1198 | return be16_to_cpu(in->opcode) == MLX5_CMD_OP_MANAGE_PAGES; | |
1199 | } | |
1200 | ||
746b5583 EC |
1201 | static int cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out, |
1202 | int out_size, mlx5_cmd_cbk_t callback, void *context) | |
e126ba97 EC |
1203 | { |
1204 | struct mlx5_cmd_msg *inb; | |
1205 | struct mlx5_cmd_msg *outb; | |
1206 | int pages_queue; | |
746b5583 | 1207 | gfp_t gfp; |
e126ba97 EC |
1208 | int err; |
1209 | u8 status = 0; | |
1210 | ||
1211 | pages_queue = is_manage_pages(in); | |
746b5583 | 1212 | gfp = callback ? GFP_ATOMIC : GFP_KERNEL; |
e126ba97 | 1213 | |
746b5583 | 1214 | inb = alloc_msg(dev, in_size, gfp); |
e126ba97 EC |
1215 | if (IS_ERR(inb)) { |
1216 | err = PTR_ERR(inb); | |
1217 | return err; | |
1218 | } | |
1219 | ||
1220 | err = mlx5_copy_to_msg(inb, in, in_size); | |
1221 | if (err) { | |
1222 | mlx5_core_warn(dev, "err %d\n", err); | |
1223 | goto out_in; | |
1224 | } | |
1225 | ||
746b5583 | 1226 | outb = mlx5_alloc_cmd_msg(dev, gfp, out_size); |
e126ba97 EC |
1227 | if (IS_ERR(outb)) { |
1228 | err = PTR_ERR(outb); | |
1229 | goto out_in; | |
1230 | } | |
1231 | ||
746b5583 EC |
1232 | err = mlx5_cmd_invoke(dev, inb, outb, out, out_size, callback, context, |
1233 | pages_queue, &status); | |
e126ba97 EC |
1234 | if (err) |
1235 | goto out_out; | |
1236 | ||
1237 | mlx5_core_dbg(dev, "err %d, status %d\n", err, status); | |
1238 | if (status) { | |
1239 | err = status_to_err(status); | |
1240 | goto out_out; | |
1241 | } | |
1242 | ||
05e4ecd1 EC |
1243 | if (!callback) |
1244 | err = mlx5_copy_from_msg(out, outb, out_size); | |
e126ba97 EC |
1245 | |
1246 | out_out: | |
746b5583 EC |
1247 | if (!callback) |
1248 | mlx5_free_cmd_msg(dev, outb); | |
e126ba97 EC |
1249 | |
1250 | out_in: | |
746b5583 EC |
1251 | if (!callback) |
1252 | free_msg(dev, inb); | |
e126ba97 EC |
1253 | return err; |
1254 | } | |
746b5583 EC |
1255 | |
1256 | int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out, | |
1257 | int out_size) | |
1258 | { | |
1259 | return cmd_exec(dev, in, in_size, out, out_size, NULL, NULL); | |
1260 | } | |
e126ba97 EC |
1261 | EXPORT_SYMBOL(mlx5_cmd_exec); |
1262 | ||
746b5583 EC |
1263 | int mlx5_cmd_exec_cb(struct mlx5_core_dev *dev, void *in, int in_size, |
1264 | void *out, int out_size, mlx5_cmd_cbk_t callback, | |
1265 | void *context) | |
1266 | { | |
1267 | return cmd_exec(dev, in, in_size, out, out_size, callback, context); | |
1268 | } | |
1269 | EXPORT_SYMBOL(mlx5_cmd_exec_cb); | |
1270 | ||
e126ba97 EC |
1271 | static void destroy_msg_cache(struct mlx5_core_dev *dev) |
1272 | { | |
1273 | struct mlx5_cmd *cmd = &dev->cmd; | |
1274 | struct mlx5_cmd_msg *msg; | |
1275 | struct mlx5_cmd_msg *n; | |
1276 | ||
1277 | list_for_each_entry_safe(msg, n, &cmd->cache.large.head, list) { | |
1278 | list_del(&msg->list); | |
1279 | mlx5_free_cmd_msg(dev, msg); | |
1280 | } | |
1281 | ||
1282 | list_for_each_entry_safe(msg, n, &cmd->cache.med.head, list) { | |
1283 | list_del(&msg->list); | |
1284 | mlx5_free_cmd_msg(dev, msg); | |
1285 | } | |
1286 | } | |
1287 | ||
1288 | static int create_msg_cache(struct mlx5_core_dev *dev) | |
1289 | { | |
1290 | struct mlx5_cmd *cmd = &dev->cmd; | |
1291 | struct mlx5_cmd_msg *msg; | |
1292 | int err; | |
1293 | int i; | |
1294 | ||
1295 | spin_lock_init(&cmd->cache.large.lock); | |
1296 | INIT_LIST_HEAD(&cmd->cache.large.head); | |
1297 | spin_lock_init(&cmd->cache.med.lock); | |
1298 | INIT_LIST_HEAD(&cmd->cache.med.head); | |
1299 | ||
1300 | for (i = 0; i < NUM_LONG_LISTS; i++) { | |
1301 | msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, LONG_LIST_SIZE); | |
1302 | if (IS_ERR(msg)) { | |
1303 | err = PTR_ERR(msg); | |
1304 | goto ex_err; | |
1305 | } | |
1306 | msg->cache = &cmd->cache.large; | |
1307 | list_add_tail(&msg->list, &cmd->cache.large.head); | |
1308 | } | |
1309 | ||
1310 | for (i = 0; i < NUM_MED_LISTS; i++) { | |
1311 | msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, MED_LIST_SIZE); | |
1312 | if (IS_ERR(msg)) { | |
1313 | err = PTR_ERR(msg); | |
1314 | goto ex_err; | |
1315 | } | |
1316 | msg->cache = &cmd->cache.med; | |
1317 | list_add_tail(&msg->list, &cmd->cache.med.head); | |
1318 | } | |
1319 | ||
1320 | return 0; | |
1321 | ||
1322 | ex_err: | |
1323 | destroy_msg_cache(dev); | |
1324 | return err; | |
1325 | } | |
1326 | ||
64599cca EC |
1327 | static int alloc_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd) |
1328 | { | |
1329 | struct device *ddev = &dev->pdev->dev; | |
1330 | ||
1331 | cmd->cmd_alloc_buf = dma_zalloc_coherent(ddev, MLX5_ADAPTER_PAGE_SIZE, | |
1332 | &cmd->alloc_dma, GFP_KERNEL); | |
1333 | if (!cmd->cmd_alloc_buf) | |
1334 | return -ENOMEM; | |
1335 | ||
1336 | /* make sure it is aligned to 4K */ | |
1337 | if (!((uintptr_t)cmd->cmd_alloc_buf & (MLX5_ADAPTER_PAGE_SIZE - 1))) { | |
1338 | cmd->cmd_buf = cmd->cmd_alloc_buf; | |
1339 | cmd->dma = cmd->alloc_dma; | |
1340 | cmd->alloc_size = MLX5_ADAPTER_PAGE_SIZE; | |
1341 | return 0; | |
1342 | } | |
1343 | ||
1344 | dma_free_coherent(ddev, MLX5_ADAPTER_PAGE_SIZE, cmd->cmd_alloc_buf, | |
1345 | cmd->alloc_dma); | |
1346 | cmd->cmd_alloc_buf = dma_zalloc_coherent(ddev, | |
1347 | 2 * MLX5_ADAPTER_PAGE_SIZE - 1, | |
1348 | &cmd->alloc_dma, GFP_KERNEL); | |
1349 | if (!cmd->cmd_alloc_buf) | |
1350 | return -ENOMEM; | |
1351 | ||
1352 | cmd->cmd_buf = PTR_ALIGN(cmd->cmd_alloc_buf, MLX5_ADAPTER_PAGE_SIZE); | |
1353 | cmd->dma = ALIGN(cmd->alloc_dma, MLX5_ADAPTER_PAGE_SIZE); | |
1354 | cmd->alloc_size = 2 * MLX5_ADAPTER_PAGE_SIZE - 1; | |
1355 | return 0; | |
1356 | } | |
1357 | ||
1358 | static void free_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd) | |
1359 | { | |
1360 | struct device *ddev = &dev->pdev->dev; | |
1361 | ||
1362 | dma_free_coherent(ddev, cmd->alloc_size, cmd->cmd_alloc_buf, | |
1363 | cmd->alloc_dma); | |
1364 | } | |
1365 | ||
e126ba97 EC |
1366 | int mlx5_cmd_init(struct mlx5_core_dev *dev) |
1367 | { | |
1368 | int size = sizeof(struct mlx5_cmd_prot_block); | |
1369 | int align = roundup_pow_of_two(size); | |
1370 | struct mlx5_cmd *cmd = &dev->cmd; | |
1371 | u32 cmd_h, cmd_l; | |
1372 | u16 cmd_if_rev; | |
1373 | int err; | |
1374 | int i; | |
1375 | ||
1376 | cmd_if_rev = cmdif_rev(dev); | |
1377 | if (cmd_if_rev != CMD_IF_REV) { | |
1378 | dev_err(&dev->pdev->dev, | |
1379 | "Driver cmdif rev(%d) differs from firmware's(%d)\n", | |
1380 | CMD_IF_REV, cmd_if_rev); | |
1381 | return -EINVAL; | |
1382 | } | |
1383 | ||
1384 | cmd->pool = pci_pool_create("mlx5_cmd", dev->pdev, size, align, 0); | |
1385 | if (!cmd->pool) | |
1386 | return -ENOMEM; | |
1387 | ||
64599cca EC |
1388 | err = alloc_cmd_page(dev, cmd); |
1389 | if (err) | |
e126ba97 | 1390 | goto err_free_pool; |
e126ba97 EC |
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; | |
64599cca | 1399 | goto err_free_page; |
e126ba97 EC |
1400 | } |
1401 | ||
2d446d18 | 1402 | if (cmd->log_sz + cmd->log_stride > MLX5_ADAPTER_PAGE_SHIFT) { |
e126ba97 EC |
1403 | dev_err(&dev->pdev->dev, "command queue size overflow\n"); |
1404 | err = -EINVAL; | |
64599cca | 1405 | goto err_free_page; |
e126ba97 EC |
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; | |
64599cca | 1417 | goto err_free_page; |
e126ba97 EC |
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; | |
64599cca | 1433 | goto err_free_page; |
e126ba97 EC |
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"); | |
64599cca | 1449 | goto err_free_page; |
e126ba97 EC |
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 | ||
64599cca EC |
1474 | err_free_page: |
1475 | free_cmd_page(dev, cmd); | |
e126ba97 EC |
1476 | |
1477 | err_free_pool: | |
1478 | pci_pool_destroy(cmd->pool); | |
1479 | ||
1480 | return err; | |
1481 | } | |
1482 | EXPORT_SYMBOL(mlx5_cmd_init); | |
1483 | ||
1484 | void mlx5_cmd_cleanup(struct mlx5_core_dev *dev) | |
1485 | { | |
1486 | struct mlx5_cmd *cmd = &dev->cmd; | |
1487 | ||
1488 | clean_debug_files(dev); | |
1489 | destroy_workqueue(cmd->wq); | |
1490 | destroy_msg_cache(dev); | |
64599cca | 1491 | free_cmd_page(dev, cmd); |
e126ba97 EC |
1492 | pci_pool_destroy(cmd->pool); |
1493 | } | |
1494 | EXPORT_SYMBOL(mlx5_cmd_cleanup); | |
1495 | ||
1496 | static const char *cmd_status_str(u8 status) | |
1497 | { | |
1498 | switch (status) { | |
1499 | case MLX5_CMD_STAT_OK: | |
1500 | return "OK"; | |
1501 | case MLX5_CMD_STAT_INT_ERR: | |
1502 | return "internal error"; | |
1503 | case MLX5_CMD_STAT_BAD_OP_ERR: | |
1504 | return "bad operation"; | |
1505 | case MLX5_CMD_STAT_BAD_PARAM_ERR: | |
1506 | return "bad parameter"; | |
1507 | case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: | |
1508 | return "bad system state"; | |
1509 | case MLX5_CMD_STAT_BAD_RES_ERR: | |
1510 | return "bad resource"; | |
1511 | case MLX5_CMD_STAT_RES_BUSY: | |
1512 | return "resource busy"; | |
1513 | case MLX5_CMD_STAT_LIM_ERR: | |
1514 | return "limits exceeded"; | |
1515 | case MLX5_CMD_STAT_BAD_RES_STATE_ERR: | |
1516 | return "bad resource state"; | |
1517 | case MLX5_CMD_STAT_IX_ERR: | |
1518 | return "bad index"; | |
1519 | case MLX5_CMD_STAT_NO_RES_ERR: | |
1520 | return "no resources"; | |
1521 | case MLX5_CMD_STAT_BAD_INP_LEN_ERR: | |
1522 | return "bad input length"; | |
1523 | case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: | |
1524 | return "bad output length"; | |
1525 | case MLX5_CMD_STAT_BAD_QP_STATE_ERR: | |
1526 | return "bad QP state"; | |
1527 | case MLX5_CMD_STAT_BAD_PKT_ERR: | |
1528 | return "bad packet (discarded)"; | |
1529 | case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: | |
1530 | return "bad size too many outstanding CQEs"; | |
1531 | default: | |
1532 | return "unknown status"; | |
1533 | } | |
1534 | } | |
1535 | ||
c7a08ac7 | 1536 | static int cmd_status_to_err(u8 status) |
e126ba97 | 1537 | { |
c7a08ac7 | 1538 | switch (status) { |
e126ba97 EC |
1539 | case MLX5_CMD_STAT_OK: return 0; |
1540 | case MLX5_CMD_STAT_INT_ERR: return -EIO; | |
1541 | case MLX5_CMD_STAT_BAD_OP_ERR: return -EINVAL; | |
1542 | case MLX5_CMD_STAT_BAD_PARAM_ERR: return -EINVAL; | |
1543 | case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: return -EIO; | |
1544 | case MLX5_CMD_STAT_BAD_RES_ERR: return -EINVAL; | |
1545 | case MLX5_CMD_STAT_RES_BUSY: return -EBUSY; | |
9c865131 | 1546 | case MLX5_CMD_STAT_LIM_ERR: return -ENOMEM; |
e126ba97 EC |
1547 | case MLX5_CMD_STAT_BAD_RES_STATE_ERR: return -EINVAL; |
1548 | case MLX5_CMD_STAT_IX_ERR: return -EINVAL; | |
1549 | case MLX5_CMD_STAT_NO_RES_ERR: return -EAGAIN; | |
1550 | case MLX5_CMD_STAT_BAD_INP_LEN_ERR: return -EIO; | |
1551 | case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: return -EIO; | |
1552 | case MLX5_CMD_STAT_BAD_QP_STATE_ERR: return -EINVAL; | |
1553 | case MLX5_CMD_STAT_BAD_PKT_ERR: return -EINVAL; | |
1554 | case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: return -EINVAL; | |
1555 | default: return -EIO; | |
1556 | } | |
1557 | } | |
c7a08ac7 EC |
1558 | |
1559 | /* this will be available till all the commands use set/get macros */ | |
1560 | int mlx5_cmd_status_to_err(struct mlx5_outbox_hdr *hdr) | |
1561 | { | |
1562 | if (!hdr->status) | |
1563 | return 0; | |
1564 | ||
1565 | pr_warn("command failed, status %s(0x%x), syndrome 0x%x\n", | |
1566 | cmd_status_str(hdr->status), hdr->status, | |
1567 | be32_to_cpu(hdr->syndrome)); | |
1568 | ||
1569 | return cmd_status_to_err(hdr->status); | |
1570 | } | |
b775516b EC |
1571 | |
1572 | int mlx5_cmd_status_to_err_v2(void *ptr) | |
1573 | { | |
1574 | u32 syndrome; | |
1575 | u8 status; | |
1576 | ||
1577 | status = be32_to_cpu(*(__be32 *)ptr) >> 24; | |
1578 | if (!status) | |
1579 | return 0; | |
1580 | ||
1581 | syndrome = be32_to_cpu(*(__be32 *)(ptr + 4)); | |
1582 | ||
1583 | pr_warn("command failed, status %s(0x%x), syndrome 0x%x\n", | |
1584 | cmd_status_str(status), status, syndrome); | |
1585 | ||
1586 | return cmd_status_to_err(status); | |
1587 | } |