1 /*
2 * Copyright (c) 2013-2016, Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #include <linux/highmem.h>
34 #include <linux/module.h>
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/mlx5/eq.h>
44 #include <linux/debugfs.h>
45
46 #include "mlx5_core.h"
47 #include "lib/eq.h"
48
49 enum {
50 CMD_IF_REV = 5,
51 };
52
53 enum {
54 CMD_MODE_POLLING,
55 CMD_MODE_EVENTS
56 };
57
58 enum {
59 MLX5_CMD_DELIVERY_STAT_OK = 0x0,
60 MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR = 0x1,
61 MLX5_CMD_DELIVERY_STAT_TOK_ERR = 0x2,
62 MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR = 0x3,
63 MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR = 0x4,
64 MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR = 0x5,
65 MLX5_CMD_DELIVERY_STAT_FW_ERR = 0x6,
66 MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR = 0x7,
67 MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR = 0x8,
68 MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR = 0x9,
69 MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR = 0x10,
70 };
71
72 static struct mlx5_cmd_work_ent *
cmd_alloc_ent(struct mlx5_cmd * cmd,struct mlx5_cmd_msg * in,struct mlx5_cmd_msg * out,void * uout,int uout_size,mlx5_cmd_cbk_t cbk,void * context,int page_queue)73 cmd_alloc_ent(struct mlx5_cmd *cmd, struct mlx5_cmd_msg *in,
74 struct mlx5_cmd_msg *out, void *uout, int uout_size,
75 mlx5_cmd_cbk_t cbk, void *context, int page_queue)
76 {
77 gfp_t alloc_flags = cbk ? GFP_ATOMIC : GFP_KERNEL;
78 struct mlx5_cmd_work_ent *ent;
79
80 ent = kzalloc(sizeof(*ent), alloc_flags);
81 if (!ent)
82 return ERR_PTR(-ENOMEM);
83
84 ent->idx = -EINVAL;
85 ent->in = in;
86 ent->out = out;
87 ent->uout = uout;
88 ent->uout_size = uout_size;
89 ent->callback = cbk;
90 ent->context = context;
91 ent->cmd = cmd;
92 ent->page_queue = page_queue;
93 refcount_set(&ent->refcnt, 1);
94
95 return ent;
96 }
97
cmd_free_ent(struct mlx5_cmd_work_ent * ent)98 static void cmd_free_ent(struct mlx5_cmd_work_ent *ent)
99 {
100 kfree(ent);
101 }
102
alloc_token(struct mlx5_cmd * cmd)103 static u8 alloc_token(struct mlx5_cmd *cmd)
104 {
105 u8 token;
106
107 spin_lock(&cmd->token_lock);
108 cmd->token++;
109 if (cmd->token == 0)
110 cmd->token++;
111 token = cmd->token;
112 spin_unlock(&cmd->token_lock);
113
114 return token;
115 }
116
cmd_alloc_index(struct mlx5_cmd * cmd)117 static int cmd_alloc_index(struct mlx5_cmd *cmd)
118 {
119 unsigned long flags;
120 int ret;
121
122 spin_lock_irqsave(&cmd->alloc_lock, flags);
123 ret = find_first_bit(&cmd->bitmask, cmd->max_reg_cmds);
124 if (ret < cmd->max_reg_cmds)
125 clear_bit(ret, &cmd->bitmask);
126 spin_unlock_irqrestore(&cmd->alloc_lock, flags);
127
128 return ret < cmd->max_reg_cmds ? ret : -ENOMEM;
129 }
130
cmd_free_index(struct mlx5_cmd * cmd,int idx)131 static void cmd_free_index(struct mlx5_cmd *cmd, int idx)
132 {
133 unsigned long flags;
134
135 spin_lock_irqsave(&cmd->alloc_lock, flags);
136 set_bit(idx, &cmd->bitmask);
137 spin_unlock_irqrestore(&cmd->alloc_lock, flags);
138 }
139
cmd_ent_get(struct mlx5_cmd_work_ent * ent)140 static void cmd_ent_get(struct mlx5_cmd_work_ent *ent)
141 {
142 refcount_inc(&ent->refcnt);
143 }
144
cmd_ent_put(struct mlx5_cmd_work_ent * ent)145 static void cmd_ent_put(struct mlx5_cmd_work_ent *ent)
146 {
147 if (!refcount_dec_and_test(&ent->refcnt))
148 return;
149
150 if (ent->idx >= 0)
151 cmd_free_index(ent->cmd, ent->idx);
152
153 cmd_free_ent(ent);
154 }
155
get_inst(struct mlx5_cmd * cmd,int idx)156 static struct mlx5_cmd_layout *get_inst(struct mlx5_cmd *cmd, int idx)
157 {
158 return cmd->cmd_buf + (idx << cmd->log_stride);
159 }
160
mlx5_calc_cmd_blocks(struct mlx5_cmd_msg * msg)161 static int mlx5_calc_cmd_blocks(struct mlx5_cmd_msg *msg)
162 {
163 int size = msg->len;
164 int blen = size - min_t(int, sizeof(msg->first.data), size);
165
166 return DIV_ROUND_UP(blen, MLX5_CMD_DATA_BLOCK_SIZE);
167 }
168
xor8_buf(void * buf,size_t offset,int len)169 static u8 xor8_buf(void *buf, size_t offset, int len)
170 {
171 u8 *ptr = buf;
172 u8 sum = 0;
173 int i;
174 int end = len + offset;
175
176 for (i = offset; i < end; i++)
177 sum ^= ptr[i];
178
179 return sum;
180 }
181
verify_block_sig(struct mlx5_cmd_prot_block * block)182 static int verify_block_sig(struct mlx5_cmd_prot_block *block)
183 {
184 size_t rsvd0_off = offsetof(struct mlx5_cmd_prot_block, rsvd0);
185 int xor_len = sizeof(*block) - sizeof(block->data) - 1;
186
187 if (xor8_buf(block, rsvd0_off, xor_len) != 0xff)
188 return -EINVAL;
189
190 if (xor8_buf(block, 0, sizeof(*block)) != 0xff)
191 return -EINVAL;
192
193 return 0;
194 }
195
calc_block_sig(struct mlx5_cmd_prot_block * block)196 static void calc_block_sig(struct mlx5_cmd_prot_block *block)
197 {
198 int ctrl_xor_len = sizeof(*block) - sizeof(block->data) - 2;
199 size_t rsvd0_off = offsetof(struct mlx5_cmd_prot_block, rsvd0);
200
201 block->ctrl_sig = ~xor8_buf(block, rsvd0_off, ctrl_xor_len);
202 block->sig = ~xor8_buf(block, 0, sizeof(*block) - 1);
203 }
204
calc_chain_sig(struct mlx5_cmd_msg * msg)205 static void calc_chain_sig(struct mlx5_cmd_msg *msg)
206 {
207 struct mlx5_cmd_mailbox *next = msg->next;
208 int n = mlx5_calc_cmd_blocks(msg);
209 int i = 0;
210
211 for (i = 0; i < n && next; i++) {
212 calc_block_sig(next->buf);
213 next = next->next;
214 }
215 }
216
set_signature(struct mlx5_cmd_work_ent * ent,int csum)217 static void set_signature(struct mlx5_cmd_work_ent *ent, int csum)
218 {
219 ent->lay->sig = ~xor8_buf(ent->lay, 0, sizeof(*ent->lay));
220 if (csum) {
221 calc_chain_sig(ent->in);
222 calc_chain_sig(ent->out);
223 }
224 }
225
poll_timeout(struct mlx5_cmd_work_ent * ent)226 static void poll_timeout(struct mlx5_cmd_work_ent *ent)
227 {
228 unsigned long poll_end = jiffies + msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC + 1000);
229 u8 own;
230
231 do {
232 own = READ_ONCE(ent->lay->status_own);
233 if (!(own & CMD_OWNER_HW)) {
234 ent->ret = 0;
235 return;
236 }
237 cond_resched();
238 } while (time_before(jiffies, poll_end));
239
240 ent->ret = -ETIMEDOUT;
241 }
242
verify_signature(struct mlx5_cmd_work_ent * ent)243 static int verify_signature(struct mlx5_cmd_work_ent *ent)
244 {
245 struct mlx5_cmd_mailbox *next = ent->out->next;
246 int n = mlx5_calc_cmd_blocks(ent->out);
247 int err;
248 u8 sig;
249 int i = 0;
250
251 sig = xor8_buf(ent->lay, 0, sizeof(*ent->lay));
252 if (sig != 0xff)
253 return -EINVAL;
254
255 for (i = 0; i < n && next; i++) {
256 err = verify_block_sig(next->buf);
257 if (err)
258 return err;
259
260 next = next->next;
261 }
262
263 return 0;
264 }
265
dump_buf(void * buf,int size,int data_only,int offset)266 static void dump_buf(void *buf, int size, int data_only, int offset)
267 {
268 __be32 *p = buf;
269 int i;
270
271 for (i = 0; i < size; i += 16) {
272 pr_debug("%03x: %08x %08x %08x %08x\n", offset, be32_to_cpu(p[0]),
273 be32_to_cpu(p[1]), be32_to_cpu(p[2]),
274 be32_to_cpu(p[3]));
275 p += 4;
276 offset += 16;
277 }
278 if (!data_only)
279 pr_debug("\n");
280 }
281
mlx5_internal_err_ret_value(struct mlx5_core_dev * dev,u16 op,u32 * synd,u8 * status)282 static int mlx5_internal_err_ret_value(struct mlx5_core_dev *dev, u16 op,
283 u32 *synd, u8 *status)
284 {
285 *synd = 0;
286 *status = 0;
287
288 switch (op) {
289 case MLX5_CMD_OP_TEARDOWN_HCA:
290 case MLX5_CMD_OP_DISABLE_HCA:
291 case MLX5_CMD_OP_MANAGE_PAGES:
292 case MLX5_CMD_OP_DESTROY_MKEY:
293 case MLX5_CMD_OP_DESTROY_EQ:
294 case MLX5_CMD_OP_DESTROY_CQ:
295 case MLX5_CMD_OP_DESTROY_QP:
296 case MLX5_CMD_OP_DESTROY_PSV:
297 case MLX5_CMD_OP_DESTROY_SRQ:
298 case MLX5_CMD_OP_DESTROY_XRC_SRQ:
299 case MLX5_CMD_OP_DESTROY_XRQ:
300 case MLX5_CMD_OP_DESTROY_DCT:
301 case MLX5_CMD_OP_DEALLOC_Q_COUNTER:
302 case MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT:
303 case MLX5_CMD_OP_DESTROY_QOS_PARA_VPORT:
304 case MLX5_CMD_OP_DEALLOC_PD:
305 case MLX5_CMD_OP_DEALLOC_UAR:
306 case MLX5_CMD_OP_DETACH_FROM_MCG:
307 case MLX5_CMD_OP_DEALLOC_XRCD:
308 case MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN:
309 case MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT:
310 case MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY:
311 case MLX5_CMD_OP_DESTROY_LAG:
312 case MLX5_CMD_OP_DESTROY_VPORT_LAG:
313 case MLX5_CMD_OP_DESTROY_TIR:
314 case MLX5_CMD_OP_DESTROY_SQ:
315 case MLX5_CMD_OP_DESTROY_RQ:
316 case MLX5_CMD_OP_DESTROY_RMP:
317 case MLX5_CMD_OP_DESTROY_TIS:
318 case MLX5_CMD_OP_DESTROY_RQT:
319 case MLX5_CMD_OP_DESTROY_FLOW_TABLE:
320 case MLX5_CMD_OP_DESTROY_FLOW_GROUP:
321 case MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY:
322 case MLX5_CMD_OP_DEALLOC_FLOW_COUNTER:
323 case MLX5_CMD_OP_2ERR_QP:
324 case MLX5_CMD_OP_2RST_QP:
325 case MLX5_CMD_OP_MODIFY_NIC_VPORT_CONTEXT:
326 case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
327 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
328 case MLX5_CMD_OP_SET_FLOW_TABLE_ROOT:
329 case MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT:
330 case MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT:
331 case MLX5_CMD_OP_FPGA_DESTROY_QP:
332 case MLX5_CMD_OP_DESTROY_GENERAL_OBJECT:
333 case MLX5_CMD_OP_DEALLOC_MEMIC:
334 case MLX5_CMD_OP_PAGE_FAULT_RESUME:
335 case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
336 return MLX5_CMD_STAT_OK;
337
338 case MLX5_CMD_OP_QUERY_HCA_CAP:
339 case MLX5_CMD_OP_QUERY_ADAPTER:
340 case MLX5_CMD_OP_INIT_HCA:
341 case MLX5_CMD_OP_ENABLE_HCA:
342 case MLX5_CMD_OP_QUERY_PAGES:
343 case MLX5_CMD_OP_SET_HCA_CAP:
344 case MLX5_CMD_OP_QUERY_ISSI:
345 case MLX5_CMD_OP_SET_ISSI:
346 case MLX5_CMD_OP_CREATE_MKEY:
347 case MLX5_CMD_OP_QUERY_MKEY:
348 case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS:
349 case MLX5_CMD_OP_CREATE_EQ:
350 case MLX5_CMD_OP_QUERY_EQ:
351 case MLX5_CMD_OP_GEN_EQE:
352 case MLX5_CMD_OP_CREATE_CQ:
353 case MLX5_CMD_OP_QUERY_CQ:
354 case MLX5_CMD_OP_MODIFY_CQ:
355 case MLX5_CMD_OP_CREATE_QP:
356 case MLX5_CMD_OP_RST2INIT_QP:
357 case MLX5_CMD_OP_INIT2RTR_QP:
358 case MLX5_CMD_OP_RTR2RTS_QP:
359 case MLX5_CMD_OP_RTS2RTS_QP:
360 case MLX5_CMD_OP_SQERR2RTS_QP:
361 case MLX5_CMD_OP_QUERY_QP:
362 case MLX5_CMD_OP_SQD_RTS_QP:
363 case MLX5_CMD_OP_INIT2INIT_QP:
364 case MLX5_CMD_OP_CREATE_PSV:
365 case MLX5_CMD_OP_CREATE_SRQ:
366 case MLX5_CMD_OP_QUERY_SRQ:
367 case MLX5_CMD_OP_ARM_RQ:
368 case MLX5_CMD_OP_CREATE_XRC_SRQ:
369 case MLX5_CMD_OP_QUERY_XRC_SRQ:
370 case MLX5_CMD_OP_ARM_XRC_SRQ:
371 case MLX5_CMD_OP_CREATE_XRQ:
372 case MLX5_CMD_OP_QUERY_XRQ:
373 case MLX5_CMD_OP_ARM_XRQ:
374 case MLX5_CMD_OP_CREATE_DCT:
375 case MLX5_CMD_OP_DRAIN_DCT:
376 case MLX5_CMD_OP_QUERY_DCT:
377 case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
378 case MLX5_CMD_OP_QUERY_VPORT_STATE:
379 case MLX5_CMD_OP_MODIFY_VPORT_STATE:
380 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
381 case MLX5_CMD_OP_MODIFY_ESW_VPORT_CONTEXT:
382 case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
383 case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
384 case MLX5_CMD_OP_SET_ROCE_ADDRESS:
385 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
386 case MLX5_CMD_OP_MODIFY_HCA_VPORT_CONTEXT:
387 case MLX5_CMD_OP_QUERY_HCA_VPORT_GID:
388 case MLX5_CMD_OP_QUERY_HCA_VPORT_PKEY:
389 case MLX5_CMD_OP_QUERY_VNIC_ENV:
390 case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
391 case MLX5_CMD_OP_ALLOC_Q_COUNTER:
392 case MLX5_CMD_OP_QUERY_Q_COUNTER:
393 case MLX5_CMD_OP_SET_MONITOR_COUNTER:
394 case MLX5_CMD_OP_ARM_MONITOR_COUNTER:
395 case MLX5_CMD_OP_SET_PP_RATE_LIMIT:
396 case MLX5_CMD_OP_QUERY_RATE_LIMIT:
397 case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
398 case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
399 case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
400 case MLX5_CMD_OP_CREATE_QOS_PARA_VPORT:
401 case MLX5_CMD_OP_ALLOC_PD:
402 case MLX5_CMD_OP_ALLOC_UAR:
403 case MLX5_CMD_OP_CONFIG_INT_MODERATION:
404 case MLX5_CMD_OP_ACCESS_REG:
405 case MLX5_CMD_OP_ATTACH_TO_MCG:
406 case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
407 case MLX5_CMD_OP_MAD_IFC:
408 case MLX5_CMD_OP_QUERY_MAD_DEMUX:
409 case MLX5_CMD_OP_SET_MAD_DEMUX:
410 case MLX5_CMD_OP_NOP:
411 case MLX5_CMD_OP_ALLOC_XRCD:
412 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
413 case MLX5_CMD_OP_QUERY_CONG_STATUS:
414 case MLX5_CMD_OP_MODIFY_CONG_STATUS:
415 case MLX5_CMD_OP_QUERY_CONG_PARAMS:
416 case MLX5_CMD_OP_MODIFY_CONG_PARAMS:
417 case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
418 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
419 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
420 case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
421 case MLX5_CMD_OP_CREATE_LAG:
422 case MLX5_CMD_OP_MODIFY_LAG:
423 case MLX5_CMD_OP_QUERY_LAG:
424 case MLX5_CMD_OP_CREATE_VPORT_LAG:
425 case MLX5_CMD_OP_CREATE_TIR:
426 case MLX5_CMD_OP_MODIFY_TIR:
427 case MLX5_CMD_OP_QUERY_TIR:
428 case MLX5_CMD_OP_CREATE_SQ:
429 case MLX5_CMD_OP_MODIFY_SQ:
430 case MLX5_CMD_OP_QUERY_SQ:
431 case MLX5_CMD_OP_CREATE_RQ:
432 case MLX5_CMD_OP_MODIFY_RQ:
433 case MLX5_CMD_OP_QUERY_RQ:
434 case MLX5_CMD_OP_CREATE_RMP:
435 case MLX5_CMD_OP_MODIFY_RMP:
436 case MLX5_CMD_OP_QUERY_RMP:
437 case MLX5_CMD_OP_CREATE_TIS:
438 case MLX5_CMD_OP_MODIFY_TIS:
439 case MLX5_CMD_OP_QUERY_TIS:
440 case MLX5_CMD_OP_CREATE_RQT:
441 case MLX5_CMD_OP_MODIFY_RQT:
442 case MLX5_CMD_OP_QUERY_RQT:
443
444 case MLX5_CMD_OP_CREATE_FLOW_TABLE:
445 case MLX5_CMD_OP_QUERY_FLOW_TABLE:
446 case MLX5_CMD_OP_CREATE_FLOW_GROUP:
447 case MLX5_CMD_OP_QUERY_FLOW_GROUP:
448 case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
449 case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
450 case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
451 case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
452 case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
453 case MLX5_CMD_OP_FPGA_CREATE_QP:
454 case MLX5_CMD_OP_FPGA_MODIFY_QP:
455 case MLX5_CMD_OP_FPGA_QUERY_QP:
456 case MLX5_CMD_OP_FPGA_QUERY_QP_COUNTERS:
457 case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
458 case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
459 case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
460 case MLX5_CMD_OP_CREATE_UCTX:
461 case MLX5_CMD_OP_DESTROY_UCTX:
462 case MLX5_CMD_OP_CREATE_UMEM:
463 case MLX5_CMD_OP_DESTROY_UMEM:
464 case MLX5_CMD_OP_ALLOC_MEMIC:
465 case MLX5_CMD_OP_MODIFY_XRQ:
466 case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
467 *status = MLX5_DRIVER_STATUS_ABORTED;
468 *synd = MLX5_DRIVER_SYND;
469 return -EIO;
470 default:
471 mlx5_core_err(dev, "Unknown FW command (%d)\n", op);
472 return -EINVAL;
473 }
474 }
475
mlx5_command_str(int command)476 const char *mlx5_command_str(int command)
477 {
478 #define MLX5_COMMAND_STR_CASE(__cmd) case MLX5_CMD_OP_ ## __cmd: return #__cmd
479
480 switch (command) {
481 MLX5_COMMAND_STR_CASE(QUERY_HCA_CAP);
482 MLX5_COMMAND_STR_CASE(QUERY_ADAPTER);
483 MLX5_COMMAND_STR_CASE(INIT_HCA);
484 MLX5_COMMAND_STR_CASE(TEARDOWN_HCA);
485 MLX5_COMMAND_STR_CASE(ENABLE_HCA);
486 MLX5_COMMAND_STR_CASE(DISABLE_HCA);
487 MLX5_COMMAND_STR_CASE(QUERY_PAGES);
488 MLX5_COMMAND_STR_CASE(MANAGE_PAGES);
489 MLX5_COMMAND_STR_CASE(SET_HCA_CAP);
490 MLX5_COMMAND_STR_CASE(QUERY_ISSI);
491 MLX5_COMMAND_STR_CASE(SET_ISSI);
492 MLX5_COMMAND_STR_CASE(SET_DRIVER_VERSION);
493 MLX5_COMMAND_STR_CASE(CREATE_MKEY);
494 MLX5_COMMAND_STR_CASE(QUERY_MKEY);
495 MLX5_COMMAND_STR_CASE(DESTROY_MKEY);
496 MLX5_COMMAND_STR_CASE(QUERY_SPECIAL_CONTEXTS);
497 MLX5_COMMAND_STR_CASE(PAGE_FAULT_RESUME);
498 MLX5_COMMAND_STR_CASE(CREATE_EQ);
499 MLX5_COMMAND_STR_CASE(DESTROY_EQ);
500 MLX5_COMMAND_STR_CASE(QUERY_EQ);
501 MLX5_COMMAND_STR_CASE(GEN_EQE);
502 MLX5_COMMAND_STR_CASE(CREATE_CQ);
503 MLX5_COMMAND_STR_CASE(DESTROY_CQ);
504 MLX5_COMMAND_STR_CASE(QUERY_CQ);
505 MLX5_COMMAND_STR_CASE(MODIFY_CQ);
506 MLX5_COMMAND_STR_CASE(CREATE_QP);
507 MLX5_COMMAND_STR_CASE(DESTROY_QP);
508 MLX5_COMMAND_STR_CASE(RST2INIT_QP);
509 MLX5_COMMAND_STR_CASE(INIT2RTR_QP);
510 MLX5_COMMAND_STR_CASE(RTR2RTS_QP);
511 MLX5_COMMAND_STR_CASE(RTS2RTS_QP);
512 MLX5_COMMAND_STR_CASE(SQERR2RTS_QP);
513 MLX5_COMMAND_STR_CASE(2ERR_QP);
514 MLX5_COMMAND_STR_CASE(2RST_QP);
515 MLX5_COMMAND_STR_CASE(QUERY_QP);
516 MLX5_COMMAND_STR_CASE(SQD_RTS_QP);
517 MLX5_COMMAND_STR_CASE(INIT2INIT_QP);
518 MLX5_COMMAND_STR_CASE(CREATE_PSV);
519 MLX5_COMMAND_STR_CASE(DESTROY_PSV);
520 MLX5_COMMAND_STR_CASE(CREATE_SRQ);
521 MLX5_COMMAND_STR_CASE(DESTROY_SRQ);
522 MLX5_COMMAND_STR_CASE(QUERY_SRQ);
523 MLX5_COMMAND_STR_CASE(ARM_RQ);
524 MLX5_COMMAND_STR_CASE(CREATE_XRC_SRQ);
525 MLX5_COMMAND_STR_CASE(DESTROY_XRC_SRQ);
526 MLX5_COMMAND_STR_CASE(QUERY_XRC_SRQ);
527 MLX5_COMMAND_STR_CASE(ARM_XRC_SRQ);
528 MLX5_COMMAND_STR_CASE(CREATE_DCT);
529 MLX5_COMMAND_STR_CASE(DESTROY_DCT);
530 MLX5_COMMAND_STR_CASE(DRAIN_DCT);
531 MLX5_COMMAND_STR_CASE(QUERY_DCT);
532 MLX5_COMMAND_STR_CASE(ARM_DCT_FOR_KEY_VIOLATION);
533 MLX5_COMMAND_STR_CASE(QUERY_VPORT_STATE);
534 MLX5_COMMAND_STR_CASE(MODIFY_VPORT_STATE);
535 MLX5_COMMAND_STR_CASE(QUERY_ESW_VPORT_CONTEXT);
536 MLX5_COMMAND_STR_CASE(MODIFY_ESW_VPORT_CONTEXT);
537 MLX5_COMMAND_STR_CASE(QUERY_NIC_VPORT_CONTEXT);
538 MLX5_COMMAND_STR_CASE(MODIFY_NIC_VPORT_CONTEXT);
539 MLX5_COMMAND_STR_CASE(QUERY_ROCE_ADDRESS);
540 MLX5_COMMAND_STR_CASE(SET_ROCE_ADDRESS);
541 MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_CONTEXT);
542 MLX5_COMMAND_STR_CASE(MODIFY_HCA_VPORT_CONTEXT);
543 MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_GID);
544 MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_PKEY);
545 MLX5_COMMAND_STR_CASE(QUERY_VNIC_ENV);
546 MLX5_COMMAND_STR_CASE(QUERY_VPORT_COUNTER);
547 MLX5_COMMAND_STR_CASE(ALLOC_Q_COUNTER);
548 MLX5_COMMAND_STR_CASE(DEALLOC_Q_COUNTER);
549 MLX5_COMMAND_STR_CASE(QUERY_Q_COUNTER);
550 MLX5_COMMAND_STR_CASE(SET_MONITOR_COUNTER);
551 MLX5_COMMAND_STR_CASE(ARM_MONITOR_COUNTER);
552 MLX5_COMMAND_STR_CASE(SET_PP_RATE_LIMIT);
553 MLX5_COMMAND_STR_CASE(QUERY_RATE_LIMIT);
554 MLX5_COMMAND_STR_CASE(CREATE_SCHEDULING_ELEMENT);
555 MLX5_COMMAND_STR_CASE(DESTROY_SCHEDULING_ELEMENT);
556 MLX5_COMMAND_STR_CASE(QUERY_SCHEDULING_ELEMENT);
557 MLX5_COMMAND_STR_CASE(MODIFY_SCHEDULING_ELEMENT);
558 MLX5_COMMAND_STR_CASE(CREATE_QOS_PARA_VPORT);
559 MLX5_COMMAND_STR_CASE(DESTROY_QOS_PARA_VPORT);
560 MLX5_COMMAND_STR_CASE(ALLOC_PD);
561 MLX5_COMMAND_STR_CASE(DEALLOC_PD);
562 MLX5_COMMAND_STR_CASE(ALLOC_UAR);
563 MLX5_COMMAND_STR_CASE(DEALLOC_UAR);
564 MLX5_COMMAND_STR_CASE(CONFIG_INT_MODERATION);
565 MLX5_COMMAND_STR_CASE(ACCESS_REG);
566 MLX5_COMMAND_STR_CASE(ATTACH_TO_MCG);
567 MLX5_COMMAND_STR_CASE(DETACH_FROM_MCG);
568 MLX5_COMMAND_STR_CASE(GET_DROPPED_PACKET_LOG);
569 MLX5_COMMAND_STR_CASE(MAD_IFC);
570 MLX5_COMMAND_STR_CASE(QUERY_MAD_DEMUX);
571 MLX5_COMMAND_STR_CASE(SET_MAD_DEMUX);
572 MLX5_COMMAND_STR_CASE(NOP);
573 MLX5_COMMAND_STR_CASE(ALLOC_XRCD);
574 MLX5_COMMAND_STR_CASE(DEALLOC_XRCD);
575 MLX5_COMMAND_STR_CASE(ALLOC_TRANSPORT_DOMAIN);
576 MLX5_COMMAND_STR_CASE(DEALLOC_TRANSPORT_DOMAIN);
577 MLX5_COMMAND_STR_CASE(QUERY_CONG_STATUS);
578 MLX5_COMMAND_STR_CASE(MODIFY_CONG_STATUS);
579 MLX5_COMMAND_STR_CASE(QUERY_CONG_PARAMS);
580 MLX5_COMMAND_STR_CASE(MODIFY_CONG_PARAMS);
581 MLX5_COMMAND_STR_CASE(QUERY_CONG_STATISTICS);
582 MLX5_COMMAND_STR_CASE(ADD_VXLAN_UDP_DPORT);
583 MLX5_COMMAND_STR_CASE(DELETE_VXLAN_UDP_DPORT);
584 MLX5_COMMAND_STR_CASE(SET_L2_TABLE_ENTRY);
585 MLX5_COMMAND_STR_CASE(QUERY_L2_TABLE_ENTRY);
586 MLX5_COMMAND_STR_CASE(DELETE_L2_TABLE_ENTRY);
587 MLX5_COMMAND_STR_CASE(SET_WOL_ROL);
588 MLX5_COMMAND_STR_CASE(QUERY_WOL_ROL);
589 MLX5_COMMAND_STR_CASE(CREATE_LAG);
590 MLX5_COMMAND_STR_CASE(MODIFY_LAG);
591 MLX5_COMMAND_STR_CASE(QUERY_LAG);
592 MLX5_COMMAND_STR_CASE(DESTROY_LAG);
593 MLX5_COMMAND_STR_CASE(CREATE_VPORT_LAG);
594 MLX5_COMMAND_STR_CASE(DESTROY_VPORT_LAG);
595 MLX5_COMMAND_STR_CASE(CREATE_TIR);
596 MLX5_COMMAND_STR_CASE(MODIFY_TIR);
597 MLX5_COMMAND_STR_CASE(DESTROY_TIR);
598 MLX5_COMMAND_STR_CASE(QUERY_TIR);
599 MLX5_COMMAND_STR_CASE(CREATE_SQ);
600 MLX5_COMMAND_STR_CASE(MODIFY_SQ);
601 MLX5_COMMAND_STR_CASE(DESTROY_SQ);
602 MLX5_COMMAND_STR_CASE(QUERY_SQ);
603 MLX5_COMMAND_STR_CASE(CREATE_RQ);
604 MLX5_COMMAND_STR_CASE(MODIFY_RQ);
605 MLX5_COMMAND_STR_CASE(DESTROY_RQ);
606 MLX5_COMMAND_STR_CASE(QUERY_RQ);
607 MLX5_COMMAND_STR_CASE(CREATE_RMP);
608 MLX5_COMMAND_STR_CASE(MODIFY_RMP);
609 MLX5_COMMAND_STR_CASE(DESTROY_RMP);
610 MLX5_COMMAND_STR_CASE(QUERY_RMP);
611 MLX5_COMMAND_STR_CASE(CREATE_TIS);
612 MLX5_COMMAND_STR_CASE(MODIFY_TIS);
613 MLX5_COMMAND_STR_CASE(DESTROY_TIS);
614 MLX5_COMMAND_STR_CASE(QUERY_TIS);
615 MLX5_COMMAND_STR_CASE(CREATE_RQT);
616 MLX5_COMMAND_STR_CASE(MODIFY_RQT);
617 MLX5_COMMAND_STR_CASE(DESTROY_RQT);
618 MLX5_COMMAND_STR_CASE(QUERY_RQT);
619 MLX5_COMMAND_STR_CASE(SET_FLOW_TABLE_ROOT);
620 MLX5_COMMAND_STR_CASE(CREATE_FLOW_TABLE);
621 MLX5_COMMAND_STR_CASE(DESTROY_FLOW_TABLE);
622 MLX5_COMMAND_STR_CASE(QUERY_FLOW_TABLE);
623 MLX5_COMMAND_STR_CASE(CREATE_FLOW_GROUP);
624 MLX5_COMMAND_STR_CASE(DESTROY_FLOW_GROUP);
625 MLX5_COMMAND_STR_CASE(QUERY_FLOW_GROUP);
626 MLX5_COMMAND_STR_CASE(SET_FLOW_TABLE_ENTRY);
627 MLX5_COMMAND_STR_CASE(QUERY_FLOW_TABLE_ENTRY);
628 MLX5_COMMAND_STR_CASE(DELETE_FLOW_TABLE_ENTRY);
629 MLX5_COMMAND_STR_CASE(ALLOC_FLOW_COUNTER);
630 MLX5_COMMAND_STR_CASE(DEALLOC_FLOW_COUNTER);
631 MLX5_COMMAND_STR_CASE(QUERY_FLOW_COUNTER);
632 MLX5_COMMAND_STR_CASE(MODIFY_FLOW_TABLE);
633 MLX5_COMMAND_STR_CASE(ALLOC_PACKET_REFORMAT_CONTEXT);
634 MLX5_COMMAND_STR_CASE(DEALLOC_PACKET_REFORMAT_CONTEXT);
635 MLX5_COMMAND_STR_CASE(ALLOC_MODIFY_HEADER_CONTEXT);
636 MLX5_COMMAND_STR_CASE(DEALLOC_MODIFY_HEADER_CONTEXT);
637 MLX5_COMMAND_STR_CASE(FPGA_CREATE_QP);
638 MLX5_COMMAND_STR_CASE(FPGA_MODIFY_QP);
639 MLX5_COMMAND_STR_CASE(FPGA_QUERY_QP);
640 MLX5_COMMAND_STR_CASE(FPGA_QUERY_QP_COUNTERS);
641 MLX5_COMMAND_STR_CASE(FPGA_DESTROY_QP);
642 MLX5_COMMAND_STR_CASE(CREATE_XRQ);
643 MLX5_COMMAND_STR_CASE(DESTROY_XRQ);
644 MLX5_COMMAND_STR_CASE(QUERY_XRQ);
645 MLX5_COMMAND_STR_CASE(ARM_XRQ);
646 MLX5_COMMAND_STR_CASE(CREATE_GENERAL_OBJECT);
647 MLX5_COMMAND_STR_CASE(DESTROY_GENERAL_OBJECT);
648 MLX5_COMMAND_STR_CASE(MODIFY_GENERAL_OBJECT);
649 MLX5_COMMAND_STR_CASE(QUERY_GENERAL_OBJECT);
650 MLX5_COMMAND_STR_CASE(QUERY_MODIFY_HEADER_CONTEXT);
651 MLX5_COMMAND_STR_CASE(ALLOC_MEMIC);
652 MLX5_COMMAND_STR_CASE(DEALLOC_MEMIC);
653 MLX5_COMMAND_STR_CASE(QUERY_ESW_FUNCTIONS);
654 MLX5_COMMAND_STR_CASE(CREATE_UCTX);
655 MLX5_COMMAND_STR_CASE(DESTROY_UCTX);
656 MLX5_COMMAND_STR_CASE(CREATE_UMEM);
657 MLX5_COMMAND_STR_CASE(DESTROY_UMEM);
658 MLX5_COMMAND_STR_CASE(RELEASE_XRQ_ERROR);
659 MLX5_COMMAND_STR_CASE(MODIFY_XRQ);
660 default: return "unknown command opcode";
661 }
662 }
663
cmd_status_str(u8 status)664 static const char *cmd_status_str(u8 status)
665 {
666 switch (status) {
667 case MLX5_CMD_STAT_OK:
668 return "OK";
669 case MLX5_CMD_STAT_INT_ERR:
670 return "internal error";
671 case MLX5_CMD_STAT_BAD_OP_ERR:
672 return "bad operation";
673 case MLX5_CMD_STAT_BAD_PARAM_ERR:
674 return "bad parameter";
675 case MLX5_CMD_STAT_BAD_SYS_STATE_ERR:
676 return "bad system state";
677 case MLX5_CMD_STAT_BAD_RES_ERR:
678 return "bad resource";
679 case MLX5_CMD_STAT_RES_BUSY:
680 return "resource busy";
681 case MLX5_CMD_STAT_LIM_ERR:
682 return "limits exceeded";
683 case MLX5_CMD_STAT_BAD_RES_STATE_ERR:
684 return "bad resource state";
685 case MLX5_CMD_STAT_IX_ERR:
686 return "bad index";
687 case MLX5_CMD_STAT_NO_RES_ERR:
688 return "no resources";
689 case MLX5_CMD_STAT_BAD_INP_LEN_ERR:
690 return "bad input length";
691 case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR:
692 return "bad output length";
693 case MLX5_CMD_STAT_BAD_QP_STATE_ERR:
694 return "bad QP state";
695 case MLX5_CMD_STAT_BAD_PKT_ERR:
696 return "bad packet (discarded)";
697 case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR:
698 return "bad size too many outstanding CQEs";
699 default:
700 return "unknown status";
701 }
702 }
703
cmd_status_to_err(u8 status)704 static int cmd_status_to_err(u8 status)
705 {
706 switch (status) {
707 case MLX5_CMD_STAT_OK: return 0;
708 case MLX5_CMD_STAT_INT_ERR: return -EIO;
709 case MLX5_CMD_STAT_BAD_OP_ERR: return -EINVAL;
710 case MLX5_CMD_STAT_BAD_PARAM_ERR: return -EINVAL;
711 case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: return -EIO;
712 case MLX5_CMD_STAT_BAD_RES_ERR: return -EINVAL;
713 case MLX5_CMD_STAT_RES_BUSY: return -EBUSY;
714 case MLX5_CMD_STAT_LIM_ERR: return -ENOMEM;
715 case MLX5_CMD_STAT_BAD_RES_STATE_ERR: return -EINVAL;
716 case MLX5_CMD_STAT_IX_ERR: return -EINVAL;
717 case MLX5_CMD_STAT_NO_RES_ERR: return -EAGAIN;
718 case MLX5_CMD_STAT_BAD_INP_LEN_ERR: return -EIO;
719 case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: return -EIO;
720 case MLX5_CMD_STAT_BAD_QP_STATE_ERR: return -EINVAL;
721 case MLX5_CMD_STAT_BAD_PKT_ERR: return -EINVAL;
722 case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: return -EINVAL;
723 default: return -EIO;
724 }
725 }
726
727 struct mlx5_ifc_mbox_out_bits {
728 u8 status[0x8];
729 u8 reserved_at_8[0x18];
730
731 u8 syndrome[0x20];
732
733 u8 reserved_at_40[0x40];
734 };
735
736 struct mlx5_ifc_mbox_in_bits {
737 u8 opcode[0x10];
738 u8 uid[0x10];
739
740 u8 reserved_at_20[0x10];
741 u8 op_mod[0x10];
742
743 u8 reserved_at_40[0x40];
744 };
745
mlx5_cmd_mbox_status(void * out,u8 * status,u32 * syndrome)746 void mlx5_cmd_mbox_status(void *out, u8 *status, u32 *syndrome)
747 {
748 *status = MLX5_GET(mbox_out, out, status);
749 *syndrome = MLX5_GET(mbox_out, out, syndrome);
750 }
751
mlx5_cmd_check(struct mlx5_core_dev * dev,void * in,void * out)752 static int mlx5_cmd_check(struct mlx5_core_dev *dev, void *in, void *out)
753 {
754 u32 syndrome;
755 u8 status;
756 u16 opcode;
757 u16 op_mod;
758 u16 uid;
759
760 mlx5_cmd_mbox_status(out, &status, &syndrome);
761 if (!status)
762 return 0;
763
764 opcode = MLX5_GET(mbox_in, in, opcode);
765 op_mod = MLX5_GET(mbox_in, in, op_mod);
766 uid = MLX5_GET(mbox_in, in, uid);
767
768 if (!uid && opcode != MLX5_CMD_OP_DESTROY_MKEY)
769 mlx5_core_err_rl(dev,
770 "%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x)\n",
771 mlx5_command_str(opcode), opcode, op_mod,
772 cmd_status_str(status), status, syndrome);
773 else
774 mlx5_core_dbg(dev,
775 "%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x)\n",
776 mlx5_command_str(opcode),
777 opcode, op_mod,
778 cmd_status_str(status),
779 status,
780 syndrome);
781
782 return cmd_status_to_err(status);
783 }
784
dump_command(struct mlx5_core_dev * dev,struct mlx5_cmd_work_ent * ent,int input)785 static void dump_command(struct mlx5_core_dev *dev,
786 struct mlx5_cmd_work_ent *ent, int input)
787 {
788 struct mlx5_cmd_msg *msg = input ? ent->in : ent->out;
789 u16 op = MLX5_GET(mbox_in, ent->lay->in, opcode);
790 struct mlx5_cmd_mailbox *next = msg->next;
791 int n = mlx5_calc_cmd_blocks(msg);
792 int data_only;
793 u32 offset = 0;
794 int dump_len;
795 int i;
796
797 data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA));
798
799 if (data_only)
800 mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA,
801 "dump command data %s(0x%x) %s\n",
802 mlx5_command_str(op), op,
803 input ? "INPUT" : "OUTPUT");
804 else
805 mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n",
806 mlx5_command_str(op), op,
807 input ? "INPUT" : "OUTPUT");
808
809 if (data_only) {
810 if (input) {
811 dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset);
812 offset += sizeof(ent->lay->in);
813 } else {
814 dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset);
815 offset += sizeof(ent->lay->out);
816 }
817 } else {
818 dump_buf(ent->lay, sizeof(*ent->lay), 0, offset);
819 offset += sizeof(*ent->lay);
820 }
821
822 for (i = 0; i < n && next; i++) {
823 if (data_only) {
824 dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset);
825 dump_buf(next->buf, dump_len, 1, offset);
826 offset += MLX5_CMD_DATA_BLOCK_SIZE;
827 } else {
828 mlx5_core_dbg(dev, "command block:\n");
829 dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset);
830 offset += sizeof(struct mlx5_cmd_prot_block);
831 }
832 next = next->next;
833 }
834
835 if (data_only)
836 pr_debug("\n");
837 }
838
msg_to_opcode(struct mlx5_cmd_msg * in)839 static u16 msg_to_opcode(struct mlx5_cmd_msg *in)
840 {
841 return MLX5_GET(mbox_in, in->first.data, opcode);
842 }
843
844 static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool forced);
845
cb_timeout_handler(struct work_struct * work)846 static void cb_timeout_handler(struct work_struct *work)
847 {
848 struct delayed_work *dwork = container_of(work, struct delayed_work,
849 work);
850 struct mlx5_cmd_work_ent *ent = container_of(dwork,
851 struct mlx5_cmd_work_ent,
852 cb_timeout_work);
853 struct mlx5_core_dev *dev = container_of(ent->cmd, struct mlx5_core_dev,
854 cmd);
855
856 mlx5_cmd_eq_recover(dev);
857
858 /* Maybe got handled by eq recover ? */
859 if (!test_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state)) {
860 mlx5_core_warn(dev, "cmd[%d]: %s(0x%x) Async, recovered after timeout\n", ent->idx,
861 mlx5_command_str(msg_to_opcode(ent->in)), msg_to_opcode(ent->in));
862 goto out; /* phew, already handled */
863 }
864
865 ent->ret = -ETIMEDOUT;
866 mlx5_core_warn(dev, "cmd[%d]: %s(0x%x) Async, timeout. Will cause a leak of a command resource\n",
867 ent->idx, mlx5_command_str(msg_to_opcode(ent->in)), msg_to_opcode(ent->in));
868 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, true);
869
870 out:
871 cmd_ent_put(ent); /* for the cmd_ent_get() took on schedule delayed work */
872 }
873
874 static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg);
875 static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev,
876 struct mlx5_cmd_msg *msg);
877
opcode_allowed(struct mlx5_cmd * cmd,u16 opcode)878 static bool opcode_allowed(struct mlx5_cmd *cmd, u16 opcode)
879 {
880 if (cmd->allowed_opcode == CMD_ALLOWED_OPCODE_ALL)
881 return true;
882
883 return cmd->allowed_opcode == opcode;
884 }
885
cmd_alloc_index_retry(struct mlx5_cmd * cmd)886 static int cmd_alloc_index_retry(struct mlx5_cmd *cmd)
887 {
888 unsigned long alloc_end = jiffies + msecs_to_jiffies(1000);
889 int idx;
890
891 retry:
892 idx = cmd_alloc_index(cmd);
893 if (idx < 0 && time_before(jiffies, alloc_end)) {
894 /* Index allocation can fail on heavy load of commands. This is a temporary
895 * situation as the current command already holds the semaphore, meaning that
896 * another command completion is being handled and it is expected to release
897 * the entry index soon.
898 */
899 cpu_relax();
900 goto retry;
901 }
902 return idx;
903 }
904
mlx5_cmd_is_down(struct mlx5_core_dev * dev)905 bool mlx5_cmd_is_down(struct mlx5_core_dev *dev)
906 {
907 return pci_channel_offline(dev->pdev) ||
908 dev->cmd.state != MLX5_CMDIF_STATE_UP ||
909 dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR;
910 }
911
cmd_work_handler(struct work_struct * work)912 static void cmd_work_handler(struct work_struct *work)
913 {
914 struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work);
915 struct mlx5_cmd *cmd = ent->cmd;
916 struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev, cmd);
917 unsigned long cb_timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC);
918 struct mlx5_cmd_layout *lay;
919 struct semaphore *sem;
920 unsigned long flags;
921 bool poll_cmd = ent->polling;
922 int alloc_ret;
923 int cmd_mode;
924
925 complete(&ent->handling);
926 sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem;
927 down(sem);
928 if (!ent->page_queue) {
929 alloc_ret = cmd_alloc_index_retry(cmd);
930 if (alloc_ret < 0) {
931 mlx5_core_err_rl(dev, "failed to allocate command entry\n");
932 if (ent->callback) {
933 ent->callback(-EAGAIN, ent->context);
934 mlx5_free_cmd_msg(dev, ent->out);
935 free_msg(dev, ent->in);
936 cmd_ent_put(ent);
937 } else {
938 ent->ret = -EAGAIN;
939 complete(&ent->done);
940 }
941 up(sem);
942 return;
943 }
944 ent->idx = alloc_ret;
945 } else {
946 ent->idx = cmd->max_reg_cmds;
947 spin_lock_irqsave(&cmd->alloc_lock, flags);
948 clear_bit(ent->idx, &cmd->bitmask);
949 spin_unlock_irqrestore(&cmd->alloc_lock, flags);
950 }
951
952 cmd->ent_arr[ent->idx] = ent;
953 lay = get_inst(cmd, ent->idx);
954 ent->lay = lay;
955 memset(lay, 0, sizeof(*lay));
956 memcpy(lay->in, ent->in->first.data, sizeof(lay->in));
957 ent->op = be32_to_cpu(lay->in[0]) >> 16;
958 if (ent->in->next)
959 lay->in_ptr = cpu_to_be64(ent->in->next->dma);
960 lay->inlen = cpu_to_be32(ent->in->len);
961 if (ent->out->next)
962 lay->out_ptr = cpu_to_be64(ent->out->next->dma);
963 lay->outlen = cpu_to_be32(ent->out->len);
964 lay->type = MLX5_PCI_CMD_XPORT;
965 lay->token = ent->token;
966 lay->status_own = CMD_OWNER_HW;
967 set_signature(ent, !cmd->checksum_disabled);
968 dump_command(dev, ent, 1);
969 ent->ts1 = ktime_get_ns();
970 cmd_mode = cmd->mode;
971
972 if (ent->callback && schedule_delayed_work(&ent->cb_timeout_work, cb_timeout))
973 cmd_ent_get(ent);
974 set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state);
975
976 /* Skip sending command to fw if internal error */
977 if (mlx5_cmd_is_down(dev) || !opcode_allowed(&dev->cmd, ent->op)) {
978 u8 status = 0;
979 u32 drv_synd;
980
981 ent->ret = mlx5_internal_err_ret_value(dev, msg_to_opcode(ent->in), &drv_synd, &status);
982 MLX5_SET(mbox_out, ent->out, status, status);
983 MLX5_SET(mbox_out, ent->out, syndrome, drv_synd);
984
985 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, true);
986 return;
987 }
988
989 cmd_ent_get(ent); /* for the _real_ FW event on completion */
990 /* ring doorbell after the descriptor is valid */
991 mlx5_core_dbg(dev, "writing 0x%x to command doorbell\n", 1 << ent->idx);
992 wmb();
993 iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell);
994 /* if not in polling don't use ent after this point */
995 if (cmd_mode == CMD_MODE_POLLING || poll_cmd) {
996 poll_timeout(ent);
997 /* make sure we read the descriptor after ownership is SW */
998 rmb();
999 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, (ent->ret == -ETIMEDOUT));
1000 }
1001 }
1002
deliv_status_to_str(u8 status)1003 static const char *deliv_status_to_str(u8 status)
1004 {
1005 switch (status) {
1006 case MLX5_CMD_DELIVERY_STAT_OK:
1007 return "no errors";
1008 case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR:
1009 return "signature error";
1010 case MLX5_CMD_DELIVERY_STAT_TOK_ERR:
1011 return "token error";
1012 case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR:
1013 return "bad block number";
1014 case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR:
1015 return "output pointer not aligned to block size";
1016 case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR:
1017 return "input pointer not aligned to block size";
1018 case MLX5_CMD_DELIVERY_STAT_FW_ERR:
1019 return "firmware internal error";
1020 case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR:
1021 return "command input length error";
1022 case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR:
1023 return "command output length error";
1024 case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR:
1025 return "reserved fields not cleared";
1026 case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR:
1027 return "bad command descriptor type";
1028 default:
1029 return "unknown status code";
1030 }
1031 }
1032
1033 enum {
1034 MLX5_CMD_TIMEOUT_RECOVER_MSEC = 5 * 1000,
1035 };
1036
wait_func_handle_exec_timeout(struct mlx5_core_dev * dev,struct mlx5_cmd_work_ent * ent)1037 static void wait_func_handle_exec_timeout(struct mlx5_core_dev *dev,
1038 struct mlx5_cmd_work_ent *ent)
1039 {
1040 unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_RECOVER_MSEC);
1041
1042 mlx5_cmd_eq_recover(dev);
1043
1044 /* Re-wait on the ent->done after executing the recovery flow. If the
1045 * recovery flow (or any other recovery flow running simultaneously)
1046 * has recovered an EQE, it should cause the entry to be completed by
1047 * the command interface.
1048 */
1049 if (wait_for_completion_timeout(&ent->done, timeout)) {
1050 mlx5_core_warn(dev, "cmd[%d]: %s(0x%x) recovered after timeout\n", ent->idx,
1051 mlx5_command_str(msg_to_opcode(ent->in)), msg_to_opcode(ent->in));
1052 return;
1053 }
1054
1055 mlx5_core_warn(dev, "cmd[%d]: %s(0x%x) No done completion\n", ent->idx,
1056 mlx5_command_str(msg_to_opcode(ent->in)), msg_to_opcode(ent->in));
1057
1058 ent->ret = -ETIMEDOUT;
1059 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, true);
1060 }
1061
wait_func(struct mlx5_core_dev * dev,struct mlx5_cmd_work_ent * ent)1062 static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent)
1063 {
1064 unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC);
1065 struct mlx5_cmd *cmd = &dev->cmd;
1066 int err;
1067
1068 if (!wait_for_completion_timeout(&ent->handling, timeout) &&
1069 cancel_work_sync(&ent->work)) {
1070 ent->ret = -ECANCELED;
1071 goto out_err;
1072 }
1073 if (cmd->mode == CMD_MODE_POLLING || ent->polling)
1074 wait_for_completion(&ent->done);
1075 else if (!wait_for_completion_timeout(&ent->done, timeout))
1076 wait_func_handle_exec_timeout(dev, ent);
1077
1078 out_err:
1079 err = ent->ret;
1080
1081 if (err == -ETIMEDOUT) {
1082 mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n",
1083 mlx5_command_str(msg_to_opcode(ent->in)),
1084 msg_to_opcode(ent->in));
1085 } else if (err == -ECANCELED) {
1086 mlx5_core_warn(dev, "%s(0x%x) canceled on out of queue timeout.\n",
1087 mlx5_command_str(msg_to_opcode(ent->in)),
1088 msg_to_opcode(ent->in));
1089 }
1090 mlx5_core_dbg(dev, "err %d, delivery status %s(%d)\n",
1091 err, deliv_status_to_str(ent->status), ent->status);
1092
1093 return err;
1094 }
1095
1096 /* Notes:
1097 * 1. Callback functions may not sleep
1098 * 2. page queue commands do not support asynchrous completion
1099 */
mlx5_cmd_invoke(struct mlx5_core_dev * dev,struct mlx5_cmd_msg * in,struct mlx5_cmd_msg * out,void * uout,int uout_size,mlx5_cmd_cbk_t callback,void * context,int page_queue,u8 * status,u8 token,bool force_polling)1100 static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in,
1101 struct mlx5_cmd_msg *out, void *uout, int uout_size,
1102 mlx5_cmd_cbk_t callback,
1103 void *context, int page_queue, u8 *status,
1104 u8 token, bool force_polling)
1105 {
1106 struct mlx5_cmd *cmd = &dev->cmd;
1107 struct mlx5_cmd_work_ent *ent;
1108 struct mlx5_cmd_stats *stats;
1109 int err = 0;
1110 s64 ds;
1111 u16 op;
1112
1113 if (callback && page_queue)
1114 return -EINVAL;
1115
1116 ent = cmd_alloc_ent(cmd, in, out, uout, uout_size,
1117 callback, context, page_queue);
1118 if (IS_ERR(ent))
1119 return PTR_ERR(ent);
1120
1121 /* put for this ent is when consumed, depending on the use case
1122 * 1) (!callback) blocking flow: by caller after wait_func completes
1123 * 2) (callback) flow: by mlx5_cmd_comp_handler() when ent is handled
1124 */
1125
1126 ent->token = token;
1127 ent->polling = force_polling;
1128
1129 init_completion(&ent->handling);
1130 if (!callback)
1131 init_completion(&ent->done);
1132
1133 INIT_DELAYED_WORK(&ent->cb_timeout_work, cb_timeout_handler);
1134 INIT_WORK(&ent->work, cmd_work_handler);
1135 if (page_queue) {
1136 cmd_work_handler(&ent->work);
1137 } else if (!queue_work(cmd->wq, &ent->work)) {
1138 mlx5_core_warn(dev, "failed to queue work\n");
1139 err = -ENOMEM;
1140 goto out_free;
1141 }
1142
1143 if (callback)
1144 goto out; /* mlx5_cmd_comp_handler() will put(ent) */
1145
1146 err = wait_func(dev, ent);
1147 if (err == -ETIMEDOUT || err == -ECANCELED)
1148 goto out_free;
1149
1150 ds = ent->ts2 - ent->ts1;
1151 op = MLX5_GET(mbox_in, in->first.data, opcode);
1152 if (op < MLX5_CMD_OP_MAX) {
1153 stats = &cmd->stats[op];
1154 spin_lock_irq(&stats->lock);
1155 stats->sum += ds;
1156 ++stats->n;
1157 spin_unlock_irq(&stats->lock);
1158 }
1159 mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME,
1160 "fw exec time for %s is %lld nsec\n",
1161 mlx5_command_str(op), ds);
1162 *status = ent->status;
1163
1164 out_free:
1165 cmd_ent_put(ent);
1166 out:
1167 return err;
1168 }
1169
dbg_write(struct file * filp,const char __user * buf,size_t count,loff_t * pos)1170 static ssize_t dbg_write(struct file *filp, const char __user *buf,
1171 size_t count, loff_t *pos)
1172 {
1173 struct mlx5_core_dev *dev = filp->private_data;
1174 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1175 char lbuf[3];
1176 int err;
1177
1178 if (!dbg->in_msg || !dbg->out_msg)
1179 return -ENOMEM;
1180
1181 if (count < sizeof(lbuf) - 1)
1182 return -EINVAL;
1183
1184 if (copy_from_user(lbuf, buf, sizeof(lbuf) - 1))
1185 return -EFAULT;
1186
1187 lbuf[sizeof(lbuf) - 1] = 0;
1188
1189 if (strcmp(lbuf, "go"))
1190 return -EINVAL;
1191
1192 err = mlx5_cmd_exec(dev, dbg->in_msg, dbg->inlen, dbg->out_msg, dbg->outlen);
1193
1194 return err ? err : count;
1195 }
1196
1197 static const struct file_operations fops = {
1198 .owner = THIS_MODULE,
1199 .open = simple_open,
1200 .write = dbg_write,
1201 };
1202
mlx5_copy_to_msg(struct mlx5_cmd_msg * to,void * from,int size,u8 token)1203 static int mlx5_copy_to_msg(struct mlx5_cmd_msg *to, void *from, int size,
1204 u8 token)
1205 {
1206 struct mlx5_cmd_prot_block *block;
1207 struct mlx5_cmd_mailbox *next;
1208 int copy;
1209
1210 if (!to || !from)
1211 return -ENOMEM;
1212
1213 copy = min_t(int, size, sizeof(to->first.data));
1214 memcpy(to->first.data, from, copy);
1215 size -= copy;
1216 from += copy;
1217
1218 next = to->next;
1219 while (size) {
1220 if (!next) {
1221 /* this is a BUG */
1222 return -ENOMEM;
1223 }
1224
1225 copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE);
1226 block = next->buf;
1227 memcpy(block->data, from, copy);
1228 from += copy;
1229 size -= copy;
1230 block->token = token;
1231 next = next->next;
1232 }
1233
1234 return 0;
1235 }
1236
mlx5_copy_from_msg(void * to,struct mlx5_cmd_msg * from,int size)1237 static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size)
1238 {
1239 struct mlx5_cmd_prot_block *block;
1240 struct mlx5_cmd_mailbox *next;
1241 int copy;
1242
1243 if (!to || !from)
1244 return -ENOMEM;
1245
1246 copy = min_t(int, size, sizeof(from->first.data));
1247 memcpy(to, from->first.data, copy);
1248 size -= copy;
1249 to += copy;
1250
1251 next = from->next;
1252 while (size) {
1253 if (!next) {
1254 /* this is a BUG */
1255 return -ENOMEM;
1256 }
1257
1258 copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE);
1259 block = next->buf;
1260
1261 memcpy(to, block->data, copy);
1262 to += copy;
1263 size -= copy;
1264 next = next->next;
1265 }
1266
1267 return 0;
1268 }
1269
alloc_cmd_box(struct mlx5_core_dev * dev,gfp_t flags)1270 static struct mlx5_cmd_mailbox *alloc_cmd_box(struct mlx5_core_dev *dev,
1271 gfp_t flags)
1272 {
1273 struct mlx5_cmd_mailbox *mailbox;
1274
1275 mailbox = kmalloc(sizeof(*mailbox), flags);
1276 if (!mailbox)
1277 return ERR_PTR(-ENOMEM);
1278
1279 mailbox->buf = dma_pool_zalloc(dev->cmd.pool, flags,
1280 &mailbox->dma);
1281 if (!mailbox->buf) {
1282 mlx5_core_dbg(dev, "failed allocation\n");
1283 kfree(mailbox);
1284 return ERR_PTR(-ENOMEM);
1285 }
1286 mailbox->next = NULL;
1287
1288 return mailbox;
1289 }
1290
free_cmd_box(struct mlx5_core_dev * dev,struct mlx5_cmd_mailbox * mailbox)1291 static void free_cmd_box(struct mlx5_core_dev *dev,
1292 struct mlx5_cmd_mailbox *mailbox)
1293 {
1294 dma_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma);
1295 kfree(mailbox);
1296 }
1297
mlx5_alloc_cmd_msg(struct mlx5_core_dev * dev,gfp_t flags,int size,u8 token)1298 static struct mlx5_cmd_msg *mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev,
1299 gfp_t flags, int size,
1300 u8 token)
1301 {
1302 struct mlx5_cmd_mailbox *tmp, *head = NULL;
1303 struct mlx5_cmd_prot_block *block;
1304 struct mlx5_cmd_msg *msg;
1305 int err;
1306 int n;
1307 int i;
1308
1309 msg = kzalloc(sizeof(*msg), flags);
1310 if (!msg)
1311 return ERR_PTR(-ENOMEM);
1312
1313 msg->len = size;
1314 n = mlx5_calc_cmd_blocks(msg);
1315
1316 for (i = 0; i < n; i++) {
1317 tmp = alloc_cmd_box(dev, flags);
1318 if (IS_ERR(tmp)) {
1319 mlx5_core_warn(dev, "failed allocating block\n");
1320 err = PTR_ERR(tmp);
1321 goto err_alloc;
1322 }
1323
1324 block = tmp->buf;
1325 tmp->next = head;
1326 block->next = cpu_to_be64(tmp->next ? tmp->next->dma : 0);
1327 block->block_num = cpu_to_be32(n - i - 1);
1328 block->token = token;
1329 head = tmp;
1330 }
1331 msg->next = head;
1332 return msg;
1333
1334 err_alloc:
1335 while (head) {
1336 tmp = head->next;
1337 free_cmd_box(dev, head);
1338 head = tmp;
1339 }
1340 kfree(msg);
1341
1342 return ERR_PTR(err);
1343 }
1344
mlx5_free_cmd_msg(struct mlx5_core_dev * dev,struct mlx5_cmd_msg * msg)1345 static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev,
1346 struct mlx5_cmd_msg *msg)
1347 {
1348 struct mlx5_cmd_mailbox *head = msg->next;
1349 struct mlx5_cmd_mailbox *next;
1350
1351 while (head) {
1352 next = head->next;
1353 free_cmd_box(dev, head);
1354 head = next;
1355 }
1356 kfree(msg);
1357 }
1358
data_write(struct file * filp,const char __user * buf,size_t count,loff_t * pos)1359 static ssize_t data_write(struct file *filp, const char __user *buf,
1360 size_t count, loff_t *pos)
1361 {
1362 struct mlx5_core_dev *dev = filp->private_data;
1363 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1364 void *ptr;
1365
1366 if (*pos != 0)
1367 return -EINVAL;
1368
1369 kfree(dbg->in_msg);
1370 dbg->in_msg = NULL;
1371 dbg->inlen = 0;
1372 ptr = memdup_user(buf, count);
1373 if (IS_ERR(ptr))
1374 return PTR_ERR(ptr);
1375 dbg->in_msg = ptr;
1376 dbg->inlen = count;
1377
1378 *pos = count;
1379
1380 return count;
1381 }
1382
data_read(struct file * filp,char __user * buf,size_t count,loff_t * pos)1383 static ssize_t data_read(struct file *filp, char __user *buf, size_t count,
1384 loff_t *pos)
1385 {
1386 struct mlx5_core_dev *dev = filp->private_data;
1387 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1388
1389 if (!dbg->out_msg)
1390 return -ENOMEM;
1391
1392 return simple_read_from_buffer(buf, count, pos, dbg->out_msg,
1393 dbg->outlen);
1394 }
1395
1396 static const struct file_operations dfops = {
1397 .owner = THIS_MODULE,
1398 .open = simple_open,
1399 .write = data_write,
1400 .read = data_read,
1401 };
1402
outlen_read(struct file * filp,char __user * buf,size_t count,loff_t * pos)1403 static ssize_t outlen_read(struct file *filp, char __user *buf, size_t count,
1404 loff_t *pos)
1405 {
1406 struct mlx5_core_dev *dev = filp->private_data;
1407 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1408 char outlen[8];
1409 int err;
1410
1411 err = snprintf(outlen, sizeof(outlen), "%d", dbg->outlen);
1412 if (err < 0)
1413 return err;
1414
1415 return simple_read_from_buffer(buf, count, pos, outlen, err);
1416 }
1417
outlen_write(struct file * filp,const char __user * buf,size_t count,loff_t * pos)1418 static ssize_t outlen_write(struct file *filp, const char __user *buf,
1419 size_t count, loff_t *pos)
1420 {
1421 struct mlx5_core_dev *dev = filp->private_data;
1422 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1423 char outlen_str[8] = {0};
1424 int outlen;
1425 void *ptr;
1426 int err;
1427
1428 if (*pos != 0 || count > 6)
1429 return -EINVAL;
1430
1431 kfree(dbg->out_msg);
1432 dbg->out_msg = NULL;
1433 dbg->outlen = 0;
1434
1435 if (copy_from_user(outlen_str, buf, count))
1436 return -EFAULT;
1437
1438 err = sscanf(outlen_str, "%d", &outlen);
1439 if (err < 0)
1440 return err;
1441
1442 ptr = kzalloc(outlen, GFP_KERNEL);
1443 if (!ptr)
1444 return -ENOMEM;
1445
1446 dbg->out_msg = ptr;
1447 dbg->outlen = outlen;
1448
1449 *pos = count;
1450
1451 return count;
1452 }
1453
1454 static const struct file_operations olfops = {
1455 .owner = THIS_MODULE,
1456 .open = simple_open,
1457 .write = outlen_write,
1458 .read = outlen_read,
1459 };
1460
set_wqname(struct mlx5_core_dev * dev)1461 static void set_wqname(struct mlx5_core_dev *dev)
1462 {
1463 struct mlx5_cmd *cmd = &dev->cmd;
1464
1465 snprintf(cmd->wq_name, sizeof(cmd->wq_name), "mlx5_cmd_%s",
1466 dev_name(dev->device));
1467 }
1468
clean_debug_files(struct mlx5_core_dev * dev)1469 static void clean_debug_files(struct mlx5_core_dev *dev)
1470 {
1471 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1472
1473 if (!mlx5_debugfs_root)
1474 return;
1475
1476 mlx5_cmdif_debugfs_cleanup(dev);
1477 debugfs_remove_recursive(dbg->dbg_root);
1478 }
1479
create_debugfs_files(struct mlx5_core_dev * dev)1480 static void create_debugfs_files(struct mlx5_core_dev *dev)
1481 {
1482 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1483
1484 dbg->dbg_root = debugfs_create_dir("cmd", dev->priv.dbg_root);
1485
1486 debugfs_create_file("in", 0400, dbg->dbg_root, dev, &dfops);
1487 debugfs_create_file("out", 0200, dbg->dbg_root, dev, &dfops);
1488 debugfs_create_file("out_len", 0600, dbg->dbg_root, dev, &olfops);
1489 debugfs_create_u8("status", 0600, dbg->dbg_root, &dbg->status);
1490 debugfs_create_file("run", 0200, dbg->dbg_root, dev, &fops);
1491
1492 mlx5_cmdif_debugfs_init(dev);
1493 }
1494
mlx5_cmd_allowed_opcode(struct mlx5_core_dev * dev,u16 opcode)1495 void mlx5_cmd_allowed_opcode(struct mlx5_core_dev *dev, u16 opcode)
1496 {
1497 struct mlx5_cmd *cmd = &dev->cmd;
1498 int i;
1499
1500 for (i = 0; i < cmd->max_reg_cmds; i++)
1501 down(&cmd->sem);
1502 down(&cmd->pages_sem);
1503
1504 cmd->allowed_opcode = opcode;
1505
1506 up(&cmd->pages_sem);
1507 for (i = 0; i < cmd->max_reg_cmds; i++)
1508 up(&cmd->sem);
1509 }
1510
mlx5_cmd_change_mod(struct mlx5_core_dev * dev,int mode)1511 static void mlx5_cmd_change_mod(struct mlx5_core_dev *dev, int mode)
1512 {
1513 struct mlx5_cmd *cmd = &dev->cmd;
1514 int i;
1515
1516 for (i = 0; i < cmd->max_reg_cmds; i++)
1517 down(&cmd->sem);
1518 down(&cmd->pages_sem);
1519
1520 cmd->mode = mode;
1521
1522 up(&cmd->pages_sem);
1523 for (i = 0; i < cmd->max_reg_cmds; i++)
1524 up(&cmd->sem);
1525 }
1526
cmd_comp_notifier(struct notifier_block * nb,unsigned long type,void * data)1527 static int cmd_comp_notifier(struct notifier_block *nb,
1528 unsigned long type, void *data)
1529 {
1530 struct mlx5_core_dev *dev;
1531 struct mlx5_cmd *cmd;
1532 struct mlx5_eqe *eqe;
1533
1534 cmd = mlx5_nb_cof(nb, struct mlx5_cmd, nb);
1535 dev = container_of(cmd, struct mlx5_core_dev, cmd);
1536 eqe = data;
1537
1538 mlx5_cmd_comp_handler(dev, be32_to_cpu(eqe->data.cmd.vector), false);
1539
1540 return NOTIFY_OK;
1541 }
mlx5_cmd_use_events(struct mlx5_core_dev * dev)1542 void mlx5_cmd_use_events(struct mlx5_core_dev *dev)
1543 {
1544 MLX5_NB_INIT(&dev->cmd.nb, cmd_comp_notifier, CMD);
1545 mlx5_eq_notifier_register(dev, &dev->cmd.nb);
1546 mlx5_cmd_change_mod(dev, CMD_MODE_EVENTS);
1547 }
1548
mlx5_cmd_use_polling(struct mlx5_core_dev * dev)1549 void mlx5_cmd_use_polling(struct mlx5_core_dev *dev)
1550 {
1551 mlx5_cmd_change_mod(dev, CMD_MODE_POLLING);
1552 mlx5_eq_notifier_unregister(dev, &dev->cmd.nb);
1553 }
1554
free_msg(struct mlx5_core_dev * dev,struct mlx5_cmd_msg * msg)1555 static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg)
1556 {
1557 unsigned long flags;
1558
1559 if (msg->parent) {
1560 spin_lock_irqsave(&msg->parent->lock, flags);
1561 list_add_tail(&msg->list, &msg->parent->head);
1562 spin_unlock_irqrestore(&msg->parent->lock, flags);
1563 } else {
1564 mlx5_free_cmd_msg(dev, msg);
1565 }
1566 }
1567
mlx5_cmd_comp_handler(struct mlx5_core_dev * dev,u64 vec,bool forced)1568 static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool forced)
1569 {
1570 struct mlx5_cmd *cmd = &dev->cmd;
1571 struct mlx5_cmd_work_ent *ent;
1572 mlx5_cmd_cbk_t callback;
1573 void *context;
1574 int err;
1575 int i;
1576 s64 ds;
1577 struct mlx5_cmd_stats *stats;
1578 unsigned long flags;
1579 unsigned long vector;
1580
1581 /* there can be at most 32 command queues */
1582 vector = vec & 0xffffffff;
1583 for (i = 0; i < (1 << cmd->log_sz); i++) {
1584 if (test_bit(i, &vector)) {
1585 struct semaphore *sem;
1586
1587 ent = cmd->ent_arr[i];
1588
1589 /* if we already completed the command, ignore it */
1590 if (!test_and_clear_bit(MLX5_CMD_ENT_STATE_PENDING_COMP,
1591 &ent->state)) {
1592 /* only real completion can free the cmd slot */
1593 if (!forced) {
1594 mlx5_core_err(dev, "Command completion arrived after timeout (entry idx = %d).\n",
1595 ent->idx);
1596 cmd_ent_put(ent);
1597 }
1598 continue;
1599 }
1600
1601 if (ent->callback && cancel_delayed_work(&ent->cb_timeout_work))
1602 cmd_ent_put(ent); /* timeout work was canceled */
1603
1604 if (!forced || /* Real FW completion */
1605 pci_channel_offline(dev->pdev) || /* FW is inaccessible */
1606 dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR)
1607 cmd_ent_put(ent);
1608
1609 if (ent->page_queue)
1610 sem = &cmd->pages_sem;
1611 else
1612 sem = &cmd->sem;
1613 ent->ts2 = ktime_get_ns();
1614 memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out));
1615 dump_command(dev, ent, 0);
1616 if (!ent->ret) {
1617 if (!cmd->checksum_disabled)
1618 ent->ret = verify_signature(ent);
1619 else
1620 ent->ret = 0;
1621 if (vec & MLX5_TRIGGERED_CMD_COMP)
1622 ent->status = MLX5_DRIVER_STATUS_ABORTED;
1623 else
1624 ent->status = ent->lay->status_own >> 1;
1625
1626 mlx5_core_dbg(dev, "command completed. ret 0x%x, delivery status %s(0x%x)\n",
1627 ent->ret, deliv_status_to_str(ent->status), ent->status);
1628 }
1629
1630 if (ent->callback) {
1631 ds = ent->ts2 - ent->ts1;
1632 if (ent->op < MLX5_CMD_OP_MAX) {
1633 stats = &cmd->stats[ent->op];
1634 spin_lock_irqsave(&stats->lock, flags);
1635 stats->sum += ds;
1636 ++stats->n;
1637 spin_unlock_irqrestore(&stats->lock, flags);
1638 }
1639
1640 callback = ent->callback;
1641 context = ent->context;
1642 err = ent->ret;
1643 if (!err) {
1644 err = mlx5_copy_from_msg(ent->uout,
1645 ent->out,
1646 ent->uout_size);
1647
1648 err = err ? err : mlx5_cmd_check(dev,
1649 ent->in->first.data,
1650 ent->uout);
1651 }
1652
1653 mlx5_free_cmd_msg(dev, ent->out);
1654 free_msg(dev, ent->in);
1655
1656 err = err ? err : ent->status;
1657 /* final consumer is done, release ent */
1658 cmd_ent_put(ent);
1659 callback(err, context);
1660 } else {
1661 /* release wait_func() so mlx5_cmd_invoke()
1662 * can make the final ent_put()
1663 */
1664 complete(&ent->done);
1665 }
1666 up(sem);
1667 }
1668 }
1669 }
1670
mlx5_cmd_trigger_completions(struct mlx5_core_dev * dev)1671 void mlx5_cmd_trigger_completions(struct mlx5_core_dev *dev)
1672 {
1673 struct mlx5_cmd *cmd = &dev->cmd;
1674 unsigned long bitmask;
1675 unsigned long flags;
1676 u64 vector;
1677 int i;
1678
1679 /* wait for pending handlers to complete */
1680 mlx5_eq_synchronize_cmd_irq(dev);
1681 spin_lock_irqsave(&dev->cmd.alloc_lock, flags);
1682 vector = ~dev->cmd.bitmask & ((1ul << (1 << dev->cmd.log_sz)) - 1);
1683 if (!vector)
1684 goto no_trig;
1685
1686 bitmask = vector;
1687 /* we must increment the allocated entries refcount before triggering the completions
1688 * to guarantee pending commands will not get freed in the meanwhile.
1689 * For that reason, it also has to be done inside the alloc_lock.
1690 */
1691 for_each_set_bit(i, &bitmask, (1 << cmd->log_sz))
1692 cmd_ent_get(cmd->ent_arr[i]);
1693 vector |= MLX5_TRIGGERED_CMD_COMP;
1694 spin_unlock_irqrestore(&dev->cmd.alloc_lock, flags);
1695
1696 mlx5_core_dbg(dev, "vector 0x%llx\n", vector);
1697 mlx5_cmd_comp_handler(dev, vector, true);
1698 for_each_set_bit(i, &bitmask, (1 << cmd->log_sz))
1699 cmd_ent_put(cmd->ent_arr[i]);
1700 return;
1701
1702 no_trig:
1703 spin_unlock_irqrestore(&dev->cmd.alloc_lock, flags);
1704 }
1705
mlx5_cmd_flush(struct mlx5_core_dev * dev)1706 void mlx5_cmd_flush(struct mlx5_core_dev *dev)
1707 {
1708 struct mlx5_cmd *cmd = &dev->cmd;
1709 int i;
1710
1711 for (i = 0; i < cmd->max_reg_cmds; i++)
1712 while (down_trylock(&cmd->sem))
1713 mlx5_cmd_trigger_completions(dev);
1714
1715 while (down_trylock(&cmd->pages_sem))
1716 mlx5_cmd_trigger_completions(dev);
1717
1718 /* Unlock cmdif */
1719 up(&cmd->pages_sem);
1720 for (i = 0; i < cmd->max_reg_cmds; i++)
1721 up(&cmd->sem);
1722 }
1723
status_to_err(u8 status)1724 static int status_to_err(u8 status)
1725 {
1726 switch (status) {
1727 case MLX5_CMD_DELIVERY_STAT_OK:
1728 case MLX5_DRIVER_STATUS_ABORTED:
1729 return 0;
1730 case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR:
1731 case MLX5_CMD_DELIVERY_STAT_TOK_ERR:
1732 return -EBADR;
1733 case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR:
1734 case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR:
1735 case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR:
1736 return -EFAULT; /* Bad address */
1737 case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR:
1738 case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR:
1739 case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR:
1740 case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR:
1741 return -ENOMSG;
1742 case MLX5_CMD_DELIVERY_STAT_FW_ERR:
1743 return -EIO;
1744 default:
1745 return -EINVAL;
1746 }
1747 }
1748
alloc_msg(struct mlx5_core_dev * dev,int in_size,gfp_t gfp)1749 static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size,
1750 gfp_t gfp)
1751 {
1752 struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM);
1753 struct cmd_msg_cache *ch = NULL;
1754 struct mlx5_cmd *cmd = &dev->cmd;
1755 int i;
1756
1757 if (in_size <= 16)
1758 goto cache_miss;
1759
1760 for (i = 0; i < MLX5_NUM_COMMAND_CACHES; i++) {
1761 ch = &cmd->cache[i];
1762 if (in_size > ch->max_inbox_size)
1763 continue;
1764 spin_lock_irq(&ch->lock);
1765 if (list_empty(&ch->head)) {
1766 spin_unlock_irq(&ch->lock);
1767 continue;
1768 }
1769 msg = list_entry(ch->head.next, typeof(*msg), list);
1770 /* For cached lists, we must explicitly state what is
1771 * the real size
1772 */
1773 msg->len = in_size;
1774 list_del(&msg->list);
1775 spin_unlock_irq(&ch->lock);
1776 break;
1777 }
1778
1779 if (!IS_ERR(msg))
1780 return msg;
1781
1782 cache_miss:
1783 msg = mlx5_alloc_cmd_msg(dev, gfp, in_size, 0);
1784 return msg;
1785 }
1786
is_manage_pages(void * in)1787 static int is_manage_pages(void *in)
1788 {
1789 return MLX5_GET(mbox_in, in, opcode) == MLX5_CMD_OP_MANAGE_PAGES;
1790 }
1791
cmd_exec(struct mlx5_core_dev * dev,void * in,int in_size,void * out,int out_size,mlx5_cmd_cbk_t callback,void * context,bool force_polling)1792 static int cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out,
1793 int out_size, mlx5_cmd_cbk_t callback, void *context,
1794 bool force_polling)
1795 {
1796 struct mlx5_cmd_msg *inb;
1797 struct mlx5_cmd_msg *outb;
1798 int pages_queue;
1799 gfp_t gfp;
1800 int err;
1801 u8 status = 0;
1802 u32 drv_synd;
1803 u16 opcode;
1804 u8 token;
1805
1806 opcode = MLX5_GET(mbox_in, in, opcode);
1807 if (mlx5_cmd_is_down(dev) || !opcode_allowed(&dev->cmd, opcode)) {
1808 err = mlx5_internal_err_ret_value(dev, opcode, &drv_synd, &status);
1809 MLX5_SET(mbox_out, out, status, status);
1810 MLX5_SET(mbox_out, out, syndrome, drv_synd);
1811 return err;
1812 }
1813
1814 pages_queue = is_manage_pages(in);
1815 gfp = callback ? GFP_ATOMIC : GFP_KERNEL;
1816
1817 inb = alloc_msg(dev, in_size, gfp);
1818 if (IS_ERR(inb)) {
1819 err = PTR_ERR(inb);
1820 return err;
1821 }
1822
1823 token = alloc_token(&dev->cmd);
1824
1825 err = mlx5_copy_to_msg(inb, in, in_size, token);
1826 if (err) {
1827 mlx5_core_warn(dev, "err %d\n", err);
1828 goto out_in;
1829 }
1830
1831 outb = mlx5_alloc_cmd_msg(dev, gfp, out_size, token);
1832 if (IS_ERR(outb)) {
1833 err = PTR_ERR(outb);
1834 goto out_in;
1835 }
1836
1837 err = mlx5_cmd_invoke(dev, inb, outb, out, out_size, callback, context,
1838 pages_queue, &status, token, force_polling);
1839 if (err)
1840 goto out_out;
1841
1842 mlx5_core_dbg(dev, "err %d, status %d\n", err, status);
1843 if (status) {
1844 err = status_to_err(status);
1845 goto out_out;
1846 }
1847
1848 if (!callback)
1849 err = mlx5_copy_from_msg(out, outb, out_size);
1850
1851 out_out:
1852 if (!callback)
1853 mlx5_free_cmd_msg(dev, outb);
1854
1855 out_in:
1856 if (!callback)
1857 free_msg(dev, inb);
1858 return err;
1859 }
1860
mlx5_cmd_exec(struct mlx5_core_dev * dev,void * in,int in_size,void * out,int out_size)1861 int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out,
1862 int out_size)
1863 {
1864 int err;
1865
1866 err = cmd_exec(dev, in, in_size, out, out_size, NULL, NULL, false);
1867 return err ? : mlx5_cmd_check(dev, in, out);
1868 }
1869 EXPORT_SYMBOL(mlx5_cmd_exec);
1870
mlx5_cmd_init_async_ctx(struct mlx5_core_dev * dev,struct mlx5_async_ctx * ctx)1871 void mlx5_cmd_init_async_ctx(struct mlx5_core_dev *dev,
1872 struct mlx5_async_ctx *ctx)
1873 {
1874 ctx->dev = dev;
1875 /* Starts at 1 to avoid doing wake_up if we are not cleaning up */
1876 atomic_set(&ctx->num_inflight, 1);
1877 init_waitqueue_head(&ctx->wait);
1878 }
1879 EXPORT_SYMBOL(mlx5_cmd_init_async_ctx);
1880
1881 /**
1882 * mlx5_cmd_cleanup_async_ctx - Clean up an async_ctx
1883 * @ctx: The ctx to clean
1884 *
1885 * Upon return all callbacks given to mlx5_cmd_exec_cb() have been called. The
1886 * caller must ensure that mlx5_cmd_exec_cb() is not called during or after
1887 * the call mlx5_cleanup_async_ctx().
1888 */
mlx5_cmd_cleanup_async_ctx(struct mlx5_async_ctx * ctx)1889 void mlx5_cmd_cleanup_async_ctx(struct mlx5_async_ctx *ctx)
1890 {
1891 atomic_dec(&ctx->num_inflight);
1892 wait_event(ctx->wait, atomic_read(&ctx->num_inflight) == 0);
1893 }
1894 EXPORT_SYMBOL(mlx5_cmd_cleanup_async_ctx);
1895
mlx5_cmd_exec_cb_handler(int status,void * _work)1896 static void mlx5_cmd_exec_cb_handler(int status, void *_work)
1897 {
1898 struct mlx5_async_work *work = _work;
1899 struct mlx5_async_ctx *ctx = work->ctx;
1900
1901 work->user_callback(status, work);
1902 if (atomic_dec_and_test(&ctx->num_inflight))
1903 wake_up(&ctx->wait);
1904 }
1905
mlx5_cmd_exec_cb(struct mlx5_async_ctx * ctx,void * in,int in_size,void * out,int out_size,mlx5_async_cbk_t callback,struct mlx5_async_work * work)1906 int mlx5_cmd_exec_cb(struct mlx5_async_ctx *ctx, void *in, int in_size,
1907 void *out, int out_size, mlx5_async_cbk_t callback,
1908 struct mlx5_async_work *work)
1909 {
1910 int ret;
1911
1912 work->ctx = ctx;
1913 work->user_callback = callback;
1914 if (WARN_ON(!atomic_inc_not_zero(&ctx->num_inflight)))
1915 return -EIO;
1916 ret = cmd_exec(ctx->dev, in, in_size, out, out_size,
1917 mlx5_cmd_exec_cb_handler, work, false);
1918 if (ret && atomic_dec_and_test(&ctx->num_inflight))
1919 wake_up(&ctx->wait);
1920
1921 return ret;
1922 }
1923 EXPORT_SYMBOL(mlx5_cmd_exec_cb);
1924
mlx5_cmd_exec_polling(struct mlx5_core_dev * dev,void * in,int in_size,void * out,int out_size)1925 int mlx5_cmd_exec_polling(struct mlx5_core_dev *dev, void *in, int in_size,
1926 void *out, int out_size)
1927 {
1928 int err;
1929
1930 err = cmd_exec(dev, in, in_size, out, out_size, NULL, NULL, true);
1931
1932 return err ? : mlx5_cmd_check(dev, in, out);
1933 }
1934 EXPORT_SYMBOL(mlx5_cmd_exec_polling);
1935
destroy_msg_cache(struct mlx5_core_dev * dev)1936 static void destroy_msg_cache(struct mlx5_core_dev *dev)
1937 {
1938 struct cmd_msg_cache *ch;
1939 struct mlx5_cmd_msg *msg;
1940 struct mlx5_cmd_msg *n;
1941 int i;
1942
1943 for (i = 0; i < MLX5_NUM_COMMAND_CACHES; i++) {
1944 ch = &dev->cmd.cache[i];
1945 list_for_each_entry_safe(msg, n, &ch->head, list) {
1946 list_del(&msg->list);
1947 mlx5_free_cmd_msg(dev, msg);
1948 }
1949 }
1950 }
1951
1952 static unsigned cmd_cache_num_ent[MLX5_NUM_COMMAND_CACHES] = {
1953 512, 32, 16, 8, 2
1954 };
1955
1956 static unsigned cmd_cache_ent_size[MLX5_NUM_COMMAND_CACHES] = {
1957 16 + MLX5_CMD_DATA_BLOCK_SIZE,
1958 16 + MLX5_CMD_DATA_BLOCK_SIZE * 2,
1959 16 + MLX5_CMD_DATA_BLOCK_SIZE * 16,
1960 16 + MLX5_CMD_DATA_BLOCK_SIZE * 256,
1961 16 + MLX5_CMD_DATA_BLOCK_SIZE * 512,
1962 };
1963
create_msg_cache(struct mlx5_core_dev * dev)1964 static void create_msg_cache(struct mlx5_core_dev *dev)
1965 {
1966 struct mlx5_cmd *cmd = &dev->cmd;
1967 struct cmd_msg_cache *ch;
1968 struct mlx5_cmd_msg *msg;
1969 int i;
1970 int k;
1971
1972 /* Initialize and fill the caches with initial entries */
1973 for (k = 0; k < MLX5_NUM_COMMAND_CACHES; k++) {
1974 ch = &cmd->cache[k];
1975 spin_lock_init(&ch->lock);
1976 INIT_LIST_HEAD(&ch->head);
1977 ch->num_ent = cmd_cache_num_ent[k];
1978 ch->max_inbox_size = cmd_cache_ent_size[k];
1979 for (i = 0; i < ch->num_ent; i++) {
1980 msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL | __GFP_NOWARN,
1981 ch->max_inbox_size, 0);
1982 if (IS_ERR(msg))
1983 break;
1984 msg->parent = ch;
1985 list_add_tail(&msg->list, &ch->head);
1986 }
1987 }
1988 }
1989
alloc_cmd_page(struct mlx5_core_dev * dev,struct mlx5_cmd * cmd)1990 static int alloc_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd)
1991 {
1992 cmd->cmd_alloc_buf = dma_alloc_coherent(mlx5_core_dma_dev(dev), MLX5_ADAPTER_PAGE_SIZE,
1993 &cmd->alloc_dma, GFP_KERNEL);
1994 if (!cmd->cmd_alloc_buf)
1995 return -ENOMEM;
1996
1997 /* make sure it is aligned to 4K */
1998 if (!((uintptr_t)cmd->cmd_alloc_buf & (MLX5_ADAPTER_PAGE_SIZE - 1))) {
1999 cmd->cmd_buf = cmd->cmd_alloc_buf;
2000 cmd->dma = cmd->alloc_dma;
2001 cmd->alloc_size = MLX5_ADAPTER_PAGE_SIZE;
2002 return 0;
2003 }
2004
2005 dma_free_coherent(mlx5_core_dma_dev(dev), MLX5_ADAPTER_PAGE_SIZE, cmd->cmd_alloc_buf,
2006 cmd->alloc_dma);
2007 cmd->cmd_alloc_buf = dma_alloc_coherent(mlx5_core_dma_dev(dev),
2008 2 * MLX5_ADAPTER_PAGE_SIZE - 1,
2009 &cmd->alloc_dma, GFP_KERNEL);
2010 if (!cmd->cmd_alloc_buf)
2011 return -ENOMEM;
2012
2013 cmd->cmd_buf = PTR_ALIGN(cmd->cmd_alloc_buf, MLX5_ADAPTER_PAGE_SIZE);
2014 cmd->dma = ALIGN(cmd->alloc_dma, MLX5_ADAPTER_PAGE_SIZE);
2015 cmd->alloc_size = 2 * MLX5_ADAPTER_PAGE_SIZE - 1;
2016 return 0;
2017 }
2018
free_cmd_page(struct mlx5_core_dev * dev,struct mlx5_cmd * cmd)2019 static void free_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd)
2020 {
2021 dma_free_coherent(mlx5_core_dma_dev(dev), cmd->alloc_size, cmd->cmd_alloc_buf,
2022 cmd->alloc_dma);
2023 }
2024
cmdif_rev(struct mlx5_core_dev * dev)2025 static u16 cmdif_rev(struct mlx5_core_dev *dev)
2026 {
2027 return ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16;
2028 }
2029
mlx5_cmd_init(struct mlx5_core_dev * dev)2030 int mlx5_cmd_init(struct mlx5_core_dev *dev)
2031 {
2032 int size = sizeof(struct mlx5_cmd_prot_block);
2033 int align = roundup_pow_of_two(size);
2034 struct mlx5_cmd *cmd = &dev->cmd;
2035 u32 cmd_h, cmd_l;
2036 u16 cmd_if_rev;
2037 int err;
2038 int i;
2039
2040 memset(cmd, 0, sizeof(*cmd));
2041 cmd_if_rev = cmdif_rev(dev);
2042 if (cmd_if_rev != CMD_IF_REV) {
2043 mlx5_core_err(dev,
2044 "Driver cmdif rev(%d) differs from firmware's(%d)\n",
2045 CMD_IF_REV, cmd_if_rev);
2046 return -EINVAL;
2047 }
2048
2049 cmd->stats = kvzalloc(MLX5_CMD_OP_MAX * sizeof(*cmd->stats), GFP_KERNEL);
2050 if (!cmd->stats)
2051 return -ENOMEM;
2052
2053 cmd->pool = dma_pool_create("mlx5_cmd", mlx5_core_dma_dev(dev), size, align, 0);
2054 if (!cmd->pool) {
2055 err = -ENOMEM;
2056 goto dma_pool_err;
2057 }
2058
2059 err = alloc_cmd_page(dev, cmd);
2060 if (err)
2061 goto err_free_pool;
2062
2063 cmd_l = ioread32be(&dev->iseg->cmdq_addr_l_sz) & 0xff;
2064 cmd->log_sz = cmd_l >> 4 & 0xf;
2065 cmd->log_stride = cmd_l & 0xf;
2066 if (1 << cmd->log_sz > MLX5_MAX_COMMANDS) {
2067 mlx5_core_err(dev, "firmware reports too many outstanding commands %d\n",
2068 1 << cmd->log_sz);
2069 err = -EINVAL;
2070 goto err_free_page;
2071 }
2072
2073 if (cmd->log_sz + cmd->log_stride > MLX5_ADAPTER_PAGE_SHIFT) {
2074 mlx5_core_err(dev, "command queue size overflow\n");
2075 err = -EINVAL;
2076 goto err_free_page;
2077 }
2078
2079 cmd->state = MLX5_CMDIF_STATE_DOWN;
2080 cmd->checksum_disabled = 1;
2081 cmd->max_reg_cmds = (1 << cmd->log_sz) - 1;
2082 cmd->bitmask = (1UL << cmd->max_reg_cmds) - 1;
2083
2084 cmd->cmdif_rev = ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16;
2085 if (cmd->cmdif_rev > CMD_IF_REV) {
2086 mlx5_core_err(dev, "driver does not support command interface version. driver %d, firmware %d\n",
2087 CMD_IF_REV, cmd->cmdif_rev);
2088 err = -EOPNOTSUPP;
2089 goto err_free_page;
2090 }
2091
2092 spin_lock_init(&cmd->alloc_lock);
2093 spin_lock_init(&cmd->token_lock);
2094 for (i = 0; i < MLX5_CMD_OP_MAX; i++)
2095 spin_lock_init(&cmd->stats[i].lock);
2096
2097 sema_init(&cmd->sem, cmd->max_reg_cmds);
2098 sema_init(&cmd->pages_sem, 1);
2099
2100 cmd_h = (u32)((u64)(cmd->dma) >> 32);
2101 cmd_l = (u32)(cmd->dma);
2102 if (cmd_l & 0xfff) {
2103 mlx5_core_err(dev, "invalid command queue address\n");
2104 err = -ENOMEM;
2105 goto err_free_page;
2106 }
2107
2108 iowrite32be(cmd_h, &dev->iseg->cmdq_addr_h);
2109 iowrite32be(cmd_l, &dev->iseg->cmdq_addr_l_sz);
2110
2111 /* Make sure firmware sees the complete address before we proceed */
2112 wmb();
2113
2114 mlx5_core_dbg(dev, "descriptor at dma 0x%llx\n", (unsigned long long)(cmd->dma));
2115
2116 cmd->mode = CMD_MODE_POLLING;
2117 cmd->allowed_opcode = CMD_ALLOWED_OPCODE_ALL;
2118
2119 create_msg_cache(dev);
2120
2121 set_wqname(dev);
2122 cmd->wq = create_singlethread_workqueue(cmd->wq_name);
2123 if (!cmd->wq) {
2124 mlx5_core_err(dev, "failed to create command workqueue\n");
2125 err = -ENOMEM;
2126 goto err_cache;
2127 }
2128
2129 create_debugfs_files(dev);
2130
2131 return 0;
2132
2133 err_cache:
2134 destroy_msg_cache(dev);
2135
2136 err_free_page:
2137 free_cmd_page(dev, cmd);
2138
2139 err_free_pool:
2140 dma_pool_destroy(cmd->pool);
2141 dma_pool_err:
2142 kvfree(cmd->stats);
2143 return err;
2144 }
2145 EXPORT_SYMBOL(mlx5_cmd_init);
2146
mlx5_cmd_cleanup(struct mlx5_core_dev * dev)2147 void mlx5_cmd_cleanup(struct mlx5_core_dev *dev)
2148 {
2149 struct mlx5_cmd *cmd = &dev->cmd;
2150
2151 clean_debug_files(dev);
2152 destroy_workqueue(cmd->wq);
2153 destroy_msg_cache(dev);
2154 free_cmd_page(dev, cmd);
2155 dma_pool_destroy(cmd->pool);
2156 kvfree(cmd->stats);
2157 }
2158 EXPORT_SYMBOL(mlx5_cmd_cleanup);
2159
mlx5_cmd_set_state(struct mlx5_core_dev * dev,enum mlx5_cmdif_state cmdif_state)2160 void mlx5_cmd_set_state(struct mlx5_core_dev *dev,
2161 enum mlx5_cmdif_state cmdif_state)
2162 {
2163 dev->cmd.state = cmdif_state;
2164 }
2165 EXPORT_SYMBOL(mlx5_cmd_set_state);
2166
