1 /*-
2 * Copyright (c) 2013-2019, Mellanox Technologies, Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 */
27
28 #include <linux/module.h>
29 #include <linux/errno.h>
30 #include <linux/pci.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/slab.h>
33 #include <linux/delay.h>
34 #include <linux/random.h>
35 #include <linux/io-mapping.h>
36 #include <linux/hardirq.h>
37 #include <linux/ktime.h>
38 #include <dev/mlx5/driver.h>
39 #include <dev/mlx5/cmd.h>
40
41 #include "mlx5_core.h"
42
43 static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size);
44 static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev,
45 struct mlx5_cmd_msg *msg);
46 static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg);
47
48 enum {
49 CMD_IF_REV = 5,
50 };
51
52 enum {
53 NUM_LONG_LISTS = 2,
54 NUM_MED_LISTS = 64,
55 LONG_LIST_SIZE = (2ULL * 1024 * 1024 * 1024 / PAGE_SIZE) * 8 + 16 +
56 MLX5_CMD_DATA_BLOCK_SIZE,
57 MED_LIST_SIZE = 16 + MLX5_CMD_DATA_BLOCK_SIZE,
58 };
59
60 enum {
61 MLX5_CMD_DELIVERY_STAT_OK = 0x0,
62 MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR = 0x1,
63 MLX5_CMD_DELIVERY_STAT_TOK_ERR = 0x2,
64 MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR = 0x3,
65 MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR = 0x4,
66 MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR = 0x5,
67 MLX5_CMD_DELIVERY_STAT_FW_ERR = 0x6,
68 MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR = 0x7,
69 MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR = 0x8,
70 MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR = 0x9,
71 MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR = 0x10,
72 };
73
74 struct mlx5_ifc_mbox_out_bits {
75 u8 status[0x8];
76 u8 reserved_at_8[0x18];
77
78 u8 syndrome[0x20];
79
80 u8 reserved_at_40[0x40];
81 };
82
83 struct mlx5_ifc_mbox_in_bits {
84 u8 opcode[0x10];
85 u8 reserved_at_10[0x10];
86
87 u8 reserved_at_20[0x10];
88 u8 op_mod[0x10];
89
90 u8 reserved_at_40[0x40];
91 };
92
93
alloc_cmd(struct mlx5_cmd * cmd,struct mlx5_cmd_msg * in,int uin_size,struct mlx5_cmd_msg * out,void * uout,int uout_size,mlx5_cmd_cbk_t cbk,void * context,int page_queue)94 static struct mlx5_cmd_work_ent *alloc_cmd(struct mlx5_cmd *cmd,
95 struct mlx5_cmd_msg *in,
96 int uin_size,
97 struct mlx5_cmd_msg *out,
98 void *uout, int uout_size,
99 mlx5_cmd_cbk_t cbk,
100 void *context, int page_queue)
101 {
102 gfp_t alloc_flags = cbk ? GFP_ATOMIC : GFP_KERNEL;
103 struct mlx5_cmd_work_ent *ent;
104
105 ent = kzalloc(sizeof(*ent), alloc_flags);
106 if (!ent)
107 return ERR_PTR(-ENOMEM);
108
109 ent->in = in;
110 ent->uin_size = uin_size;
111 ent->out = out;
112 ent->uout = uout;
113 ent->uout_size = uout_size;
114 ent->callback = cbk;
115 ent->context = context;
116 ent->cmd = cmd;
117 ent->page_queue = page_queue;
118
119 return ent;
120 }
121
alloc_token(struct mlx5_cmd * cmd)122 static u8 alloc_token(struct mlx5_cmd *cmd)
123 {
124 u8 token;
125
126 spin_lock(&cmd->token_lock);
127 cmd->token++;
128 if (cmd->token == 0)
129 cmd->token++;
130 token = cmd->token;
131 spin_unlock(&cmd->token_lock);
132
133 return token;
134 }
135
alloc_ent(struct mlx5_cmd_work_ent * ent)136 static int alloc_ent(struct mlx5_cmd_work_ent *ent)
137 {
138 unsigned long flags;
139 struct mlx5_cmd *cmd = ent->cmd;
140 struct mlx5_core_dev *dev =
141 container_of(cmd, struct mlx5_core_dev, cmd);
142 int ret = cmd->max_reg_cmds;
143
144 spin_lock_irqsave(&cmd->alloc_lock, flags);
145 if (!ent->page_queue) {
146 ret = find_first_bit(&cmd->bitmask, cmd->max_reg_cmds);
147 if (ret >= cmd->max_reg_cmds)
148 ret = -1;
149 }
150
151 if (dev->state != MLX5_DEVICE_STATE_UP)
152 ret = -1;
153
154 if (ret != -1) {
155 ent->busy = 1;
156 ent->idx = ret;
157 clear_bit(ent->idx, &cmd->bitmask);
158 cmd->ent_mode[ent->idx] =
159 ent->polling ? MLX5_CMD_MODE_POLLING : MLX5_CMD_MODE_EVENTS;
160 cmd->ent_arr[ent->idx] = ent;
161 }
162 spin_unlock_irqrestore(&cmd->alloc_lock, flags);
163
164 return ret;
165 }
166
free_ent(struct mlx5_cmd * cmd,int idx)167 static void free_ent(struct mlx5_cmd *cmd, int idx)
168 {
169 unsigned long flags;
170
171 spin_lock_irqsave(&cmd->alloc_lock, flags);
172 cmd->ent_arr[idx] = NULL; /* safety clear */
173 cmd->ent_mode[idx] = MLX5_CMD_MODE_POLLING; /* reset mode */
174 set_bit(idx, &cmd->bitmask);
175 spin_unlock_irqrestore(&cmd->alloc_lock, flags);
176 }
177
get_inst(struct mlx5_cmd * cmd,int idx)178 static struct mlx5_cmd_layout *get_inst(struct mlx5_cmd *cmd, int idx)
179 {
180 return cmd->cmd_buf + (idx << cmd->log_stride);
181 }
182
xor8_buf(void * buf,int len)183 static u8 xor8_buf(void *buf, int len)
184 {
185 u8 *ptr = buf;
186 u8 sum = 0;
187 int i;
188
189 for (i = 0; i < len; i++)
190 sum ^= ptr[i];
191
192 return sum;
193 }
194
verify_block_sig(struct mlx5_cmd_prot_block * block)195 static int verify_block_sig(struct mlx5_cmd_prot_block *block)
196 {
197 if (xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 1) != 0xff)
198 return -EINVAL;
199
200 if (xor8_buf(block, sizeof(*block)) != 0xff)
201 return -EINVAL;
202
203 return 0;
204 }
205
calc_block_sig(struct mlx5_cmd_prot_block * block,u8 token,int csum)206 static void calc_block_sig(struct mlx5_cmd_prot_block *block, u8 token,
207 int csum)
208 {
209 block->token = token;
210 if (csum) {
211 block->ctrl_sig = ~xor8_buf(block->rsvd0, sizeof(*block) -
212 sizeof(block->data) - 2);
213 block->sig = ~xor8_buf(block, sizeof(*block) - 1);
214 }
215 }
216
217 static void
calc_chain_sig(struct mlx5_cmd_msg * msg,u8 token,int csum)218 calc_chain_sig(struct mlx5_cmd_msg *msg, u8 token, int csum)
219 {
220 size_t i;
221
222 for (i = 0; i != (msg->numpages * MLX5_NUM_CMDS_IN_ADAPTER_PAGE); i++) {
223 struct mlx5_cmd_prot_block *block;
224
225 block = mlx5_fwp_get_virt(msg, i * MLX5_CMD_MBOX_SIZE);
226
227 /* compute signature */
228 calc_block_sig(block, token, csum);
229
230 /* check for last block */
231 if (block->next == 0)
232 break;
233 }
234
235 /* make sure data gets written to RAM */
236 mlx5_fwp_flush(msg);
237 }
238
set_signature(struct mlx5_cmd_work_ent * ent,int csum)239 static void set_signature(struct mlx5_cmd_work_ent *ent, int csum)
240 {
241 ent->lay->sig = ~xor8_buf(ent->lay, sizeof(*ent->lay));
242 calc_chain_sig(ent->in, ent->token, csum);
243 calc_chain_sig(ent->out, ent->token, csum);
244 }
245
poll_timeout(struct mlx5_cmd_work_ent * ent)246 static void poll_timeout(struct mlx5_cmd_work_ent *ent)
247 {
248 struct mlx5_core_dev *dev = container_of(ent->cmd,
249 struct mlx5_core_dev, cmd);
250 int poll_end = jiffies +
251 msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC + 1000);
252 u8 own;
253
254 do {
255 own = ent->lay->status_own;
256 if (!(own & CMD_OWNER_HW) ||
257 dev->state != MLX5_DEVICE_STATE_UP) {
258 ent->ret = 0;
259 return;
260 }
261 usleep_range(5000, 10000);
262 } while (time_before(jiffies, poll_end));
263
264 ent->ret = -ETIMEDOUT;
265 }
266
free_cmd(struct mlx5_cmd_work_ent * ent)267 static void free_cmd(struct mlx5_cmd_work_ent *ent)
268 {
269 cancel_delayed_work_sync(&ent->cb_timeout_work);
270 kfree(ent);
271 }
272
273 static int
verify_signature(struct mlx5_cmd_work_ent * ent)274 verify_signature(struct mlx5_cmd_work_ent *ent)
275 {
276 struct mlx5_cmd_msg *msg = ent->out;
277 size_t i;
278 int err;
279 u8 sig;
280
281 sig = xor8_buf(ent->lay, sizeof(*ent->lay));
282 if (sig != 0xff)
283 return -EINVAL;
284
285 for (i = 0; i != (msg->numpages * MLX5_NUM_CMDS_IN_ADAPTER_PAGE); i++) {
286 struct mlx5_cmd_prot_block *block;
287
288 block = mlx5_fwp_get_virt(msg, i * MLX5_CMD_MBOX_SIZE);
289
290 /* compute signature */
291 err = verify_block_sig(block);
292 if (err != 0)
293 return (err);
294
295 /* check for last block */
296 if (block->next == 0)
297 break;
298 }
299 return (0);
300 }
301
dump_buf(void * buf,int size,int data_only,int offset)302 static void dump_buf(void *buf, int size, int data_only, int offset)
303 {
304 __be32 *p = buf;
305 int i;
306
307 for (i = 0; i < size; i += 16) {
308 pr_debug("%03x: %08x %08x %08x %08x\n", offset, be32_to_cpu(p[0]),
309 be32_to_cpu(p[1]), be32_to_cpu(p[2]),
310 be32_to_cpu(p[3]));
311 p += 4;
312 offset += 16;
313 }
314 if (!data_only)
315 pr_debug("\n");
316 }
317
318 enum {
319 MLX5_DRIVER_STATUS_ABORTED = 0xfe,
320 MLX5_DRIVER_SYND = 0xbadd00de,
321 };
322
mlx5_internal_err_ret_value(struct mlx5_core_dev * dev,u16 op,u32 * synd,u8 * status)323 static int mlx5_internal_err_ret_value(struct mlx5_core_dev *dev, u16 op,
324 u32 *synd, u8 *status)
325 {
326 *synd = 0;
327 *status = 0;
328
329 switch (op) {
330 case MLX5_CMD_OP_TEARDOWN_HCA:
331 case MLX5_CMD_OP_DISABLE_HCA:
332 case MLX5_CMD_OP_MANAGE_PAGES:
333 case MLX5_CMD_OP_DESTROY_MKEY:
334 case MLX5_CMD_OP_DESTROY_EQ:
335 case MLX5_CMD_OP_DESTROY_CQ:
336 case MLX5_CMD_OP_DESTROY_QP:
337 case MLX5_CMD_OP_DESTROY_PSV:
338 case MLX5_CMD_OP_DESTROY_SRQ:
339 case MLX5_CMD_OP_DESTROY_XRC_SRQ:
340 case MLX5_CMD_OP_DESTROY_DCT:
341 case MLX5_CMD_OP_DEALLOC_Q_COUNTER:
342 case MLX5_CMD_OP_DEALLOC_PD:
343 case MLX5_CMD_OP_DEALLOC_UAR:
344 case MLX5_CMD_OP_DETACH_FROM_MCG:
345 case MLX5_CMD_OP_DEALLOC_XRCD:
346 case MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN:
347 case MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT:
348 case MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY:
349 case MLX5_CMD_OP_DESTROY_TIR:
350 case MLX5_CMD_OP_DESTROY_SQ:
351 case MLX5_CMD_OP_DESTROY_RQ:
352 case MLX5_CMD_OP_DESTROY_RMP:
353 case MLX5_CMD_OP_DESTROY_TIS:
354 case MLX5_CMD_OP_DESTROY_RQT:
355 case MLX5_CMD_OP_DESTROY_FLOW_TABLE:
356 case MLX5_CMD_OP_DESTROY_FLOW_GROUP:
357 case MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY:
358 case MLX5_CMD_OP_2ERR_QP:
359 case MLX5_CMD_OP_2RST_QP:
360 case MLX5_CMD_OP_MODIFY_NIC_VPORT_CONTEXT:
361 case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
362 case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
363 case MLX5_CMD_OP_SET_FLOW_TABLE_ROOT:
364 return MLX5_CMD_STAT_OK;
365
366 case MLX5_CMD_OP_QUERY_HCA_CAP:
367 case MLX5_CMD_OP_QUERY_ADAPTER:
368 case MLX5_CMD_OP_INIT_HCA:
369 case MLX5_CMD_OP_ENABLE_HCA:
370 case MLX5_CMD_OP_QUERY_PAGES:
371 case MLX5_CMD_OP_SET_HCA_CAP:
372 case MLX5_CMD_OP_QUERY_ISSI:
373 case MLX5_CMD_OP_SET_ISSI:
374 case MLX5_CMD_OP_CREATE_MKEY:
375 case MLX5_CMD_OP_QUERY_MKEY:
376 case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS:
377 case MLX5_CMD_OP_PAGE_FAULT_RESUME:
378 case MLX5_CMD_OP_CREATE_EQ:
379 case MLX5_CMD_OP_QUERY_EQ:
380 case MLX5_CMD_OP_GEN_EQE:
381 case MLX5_CMD_OP_CREATE_CQ:
382 case MLX5_CMD_OP_QUERY_CQ:
383 case MLX5_CMD_OP_MODIFY_CQ:
384 case MLX5_CMD_OP_CREATE_QP:
385 case MLX5_CMD_OP_RST2INIT_QP:
386 case MLX5_CMD_OP_INIT2RTR_QP:
387 case MLX5_CMD_OP_RTR2RTS_QP:
388 case MLX5_CMD_OP_RTS2RTS_QP:
389 case MLX5_CMD_OP_SQERR2RTS_QP:
390 case MLX5_CMD_OP_QUERY_QP:
391 case MLX5_CMD_OP_SQD_RTS_QP:
392 case MLX5_CMD_OP_INIT2INIT_QP:
393 case MLX5_CMD_OP_CREATE_PSV:
394 case MLX5_CMD_OP_CREATE_SRQ:
395 case MLX5_CMD_OP_QUERY_SRQ:
396 case MLX5_CMD_OP_ARM_RQ:
397 case MLX5_CMD_OP_CREATE_XRC_SRQ:
398 case MLX5_CMD_OP_QUERY_XRC_SRQ:
399 case MLX5_CMD_OP_ARM_XRC_SRQ:
400 case MLX5_CMD_OP_CREATE_DCT:
401 case MLX5_CMD_OP_DRAIN_DCT:
402 case MLX5_CMD_OP_QUERY_DCT:
403 case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
404 case MLX5_CMD_OP_QUERY_VPORT_STATE:
405 case MLX5_CMD_OP_MODIFY_VPORT_STATE:
406 case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
407 case MLX5_CMD_OP_MODIFY_ESW_VPORT_CONTEXT:
408 case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
409 case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
410 case MLX5_CMD_OP_SET_ROCE_ADDRESS:
411 case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
412 case MLX5_CMD_OP_MODIFY_HCA_VPORT_CONTEXT:
413 case MLX5_CMD_OP_QUERY_HCA_VPORT_GID:
414 case MLX5_CMD_OP_QUERY_HCA_VPORT_PKEY:
415 case MLX5_CMD_OP_QUERY_VNIC_ENV:
416 case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
417 case MLX5_CMD_OP_ALLOC_Q_COUNTER:
418 case MLX5_CMD_OP_QUERY_Q_COUNTER:
419 case MLX5_CMD_OP_ALLOC_PD:
420 case MLX5_CMD_OP_ALLOC_UAR:
421 case MLX5_CMD_OP_CONFIG_INT_MODERATION:
422 case MLX5_CMD_OP_ACCESS_REG:
423 case MLX5_CMD_OP_ATTACH_TO_MCG:
424 case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
425 case MLX5_CMD_OP_MAD_IFC:
426 case MLX5_CMD_OP_QUERY_MAD_DEMUX:
427 case MLX5_CMD_OP_SET_MAD_DEMUX:
428 case MLX5_CMD_OP_NOP:
429 case MLX5_CMD_OP_ALLOC_XRCD:
430 case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
431 case MLX5_CMD_OP_QUERY_CONG_STATUS:
432 case MLX5_CMD_OP_MODIFY_CONG_STATUS:
433 case MLX5_CMD_OP_QUERY_CONG_PARAMS:
434 case MLX5_CMD_OP_MODIFY_CONG_PARAMS:
435 case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
436 case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
437 case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
438 case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
439 case MLX5_CMD_OP_CREATE_TIR:
440 case MLX5_CMD_OP_MODIFY_TIR:
441 case MLX5_CMD_OP_QUERY_TIR:
442 case MLX5_CMD_OP_CREATE_SQ:
443 case MLX5_CMD_OP_MODIFY_SQ:
444 case MLX5_CMD_OP_QUERY_SQ:
445 case MLX5_CMD_OP_CREATE_RQ:
446 case MLX5_CMD_OP_MODIFY_RQ:
447 case MLX5_CMD_OP_QUERY_RQ:
448 case MLX5_CMD_OP_CREATE_RMP:
449 case MLX5_CMD_OP_MODIFY_RMP:
450 case MLX5_CMD_OP_QUERY_RMP:
451 case MLX5_CMD_OP_CREATE_TIS:
452 case MLX5_CMD_OP_MODIFY_TIS:
453 case MLX5_CMD_OP_QUERY_TIS:
454 case MLX5_CMD_OP_CREATE_RQT:
455 case MLX5_CMD_OP_MODIFY_RQT:
456 case MLX5_CMD_OP_QUERY_RQT:
457 case MLX5_CMD_OP_CREATE_FLOW_TABLE:
458 case MLX5_CMD_OP_QUERY_FLOW_TABLE:
459 case MLX5_CMD_OP_CREATE_FLOW_GROUP:
460 case MLX5_CMD_OP_QUERY_FLOW_GROUP:
461 case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
462 *status = MLX5_DRIVER_STATUS_ABORTED;
463 *synd = MLX5_DRIVER_SYND;
464 return -EIO;
465 default:
466 mlx5_core_err(dev, "Unknown FW command (%d)\n", op);
467 return -EINVAL;
468 }
469 }
470
mlx5_command_str(int command)471 const char *mlx5_command_str(int command)
472 {
473 #define MLX5_COMMAND_STR_CASE(__cmd) case MLX5_CMD_OP_ ## __cmd: return #__cmd
474
475 switch (command) {
476 MLX5_COMMAND_STR_CASE(QUERY_HCA_CAP);
477 MLX5_COMMAND_STR_CASE(SET_HCA_CAP);
478 MLX5_COMMAND_STR_CASE(QUERY_ADAPTER);
479 MLX5_COMMAND_STR_CASE(INIT_HCA);
480 MLX5_COMMAND_STR_CASE(TEARDOWN_HCA);
481 MLX5_COMMAND_STR_CASE(ENABLE_HCA);
482 MLX5_COMMAND_STR_CASE(DISABLE_HCA);
483 MLX5_COMMAND_STR_CASE(QUERY_PAGES);
484 MLX5_COMMAND_STR_CASE(MANAGE_PAGES);
485 MLX5_COMMAND_STR_CASE(QUERY_ISSI);
486 MLX5_COMMAND_STR_CASE(SET_ISSI);
487 MLX5_COMMAND_STR_CASE(CREATE_MKEY);
488 MLX5_COMMAND_STR_CASE(QUERY_MKEY);
489 MLX5_COMMAND_STR_CASE(DESTROY_MKEY);
490 MLX5_COMMAND_STR_CASE(QUERY_SPECIAL_CONTEXTS);
491 MLX5_COMMAND_STR_CASE(PAGE_FAULT_RESUME);
492 MLX5_COMMAND_STR_CASE(CREATE_EQ);
493 MLX5_COMMAND_STR_CASE(DESTROY_EQ);
494 MLX5_COMMAND_STR_CASE(QUERY_EQ);
495 MLX5_COMMAND_STR_CASE(GEN_EQE);
496 MLX5_COMMAND_STR_CASE(CREATE_CQ);
497 MLX5_COMMAND_STR_CASE(DESTROY_CQ);
498 MLX5_COMMAND_STR_CASE(QUERY_CQ);
499 MLX5_COMMAND_STR_CASE(MODIFY_CQ);
500 MLX5_COMMAND_STR_CASE(CREATE_QP);
501 MLX5_COMMAND_STR_CASE(DESTROY_QP);
502 MLX5_COMMAND_STR_CASE(RST2INIT_QP);
503 MLX5_COMMAND_STR_CASE(INIT2RTR_QP);
504 MLX5_COMMAND_STR_CASE(RTR2RTS_QP);
505 MLX5_COMMAND_STR_CASE(RTS2RTS_QP);
506 MLX5_COMMAND_STR_CASE(SQERR2RTS_QP);
507 MLX5_COMMAND_STR_CASE(2ERR_QP);
508 MLX5_COMMAND_STR_CASE(2RST_QP);
509 MLX5_COMMAND_STR_CASE(QUERY_QP);
510 MLX5_COMMAND_STR_CASE(SQD_RTS_QP);
511 MLX5_COMMAND_STR_CASE(MAD_IFC);
512 MLX5_COMMAND_STR_CASE(INIT2INIT_QP);
513 MLX5_COMMAND_STR_CASE(CREATE_PSV);
514 MLX5_COMMAND_STR_CASE(DESTROY_PSV);
515 MLX5_COMMAND_STR_CASE(CREATE_SRQ);
516 MLX5_COMMAND_STR_CASE(DESTROY_SRQ);
517 MLX5_COMMAND_STR_CASE(QUERY_SRQ);
518 MLX5_COMMAND_STR_CASE(ARM_RQ);
519 MLX5_COMMAND_STR_CASE(CREATE_XRC_SRQ);
520 MLX5_COMMAND_STR_CASE(DESTROY_XRC_SRQ);
521 MLX5_COMMAND_STR_CASE(QUERY_XRC_SRQ);
522 MLX5_COMMAND_STR_CASE(ARM_XRC_SRQ);
523 MLX5_COMMAND_STR_CASE(CREATE_DCT);
524 MLX5_COMMAND_STR_CASE(SET_DC_CNAK_TRACE);
525 MLX5_COMMAND_STR_CASE(DESTROY_DCT);
526 MLX5_COMMAND_STR_CASE(DRAIN_DCT);
527 MLX5_COMMAND_STR_CASE(QUERY_DCT);
528 MLX5_COMMAND_STR_CASE(ARM_DCT_FOR_KEY_VIOLATION);
529 MLX5_COMMAND_STR_CASE(QUERY_VPORT_STATE);
530 MLX5_COMMAND_STR_CASE(MODIFY_VPORT_STATE);
531 MLX5_COMMAND_STR_CASE(QUERY_ESW_VPORT_CONTEXT);
532 MLX5_COMMAND_STR_CASE(MODIFY_ESW_VPORT_CONTEXT);
533 MLX5_COMMAND_STR_CASE(QUERY_NIC_VPORT_CONTEXT);
534 MLX5_COMMAND_STR_CASE(MODIFY_NIC_VPORT_CONTEXT);
535 MLX5_COMMAND_STR_CASE(QUERY_ROCE_ADDRESS);
536 MLX5_COMMAND_STR_CASE(SET_ROCE_ADDRESS);
537 MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_CONTEXT);
538 MLX5_COMMAND_STR_CASE(MODIFY_HCA_VPORT_CONTEXT);
539 MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_GID);
540 MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_PKEY);
541 MLX5_COMMAND_STR_CASE(QUERY_VNIC_ENV);
542 MLX5_COMMAND_STR_CASE(QUERY_VPORT_COUNTER);
543 MLX5_COMMAND_STR_CASE(SET_WOL_ROL);
544 MLX5_COMMAND_STR_CASE(QUERY_WOL_ROL);
545 MLX5_COMMAND_STR_CASE(ALLOC_Q_COUNTER);
546 MLX5_COMMAND_STR_CASE(DEALLOC_Q_COUNTER);
547 MLX5_COMMAND_STR_CASE(QUERY_Q_COUNTER);
548 MLX5_COMMAND_STR_CASE(ALLOC_PD);
549 MLX5_COMMAND_STR_CASE(DEALLOC_PD);
550 MLX5_COMMAND_STR_CASE(ALLOC_UAR);
551 MLX5_COMMAND_STR_CASE(DEALLOC_UAR);
552 MLX5_COMMAND_STR_CASE(CONFIG_INT_MODERATION);
553 MLX5_COMMAND_STR_CASE(ATTACH_TO_MCG);
554 MLX5_COMMAND_STR_CASE(DETACH_FROM_MCG);
555 MLX5_COMMAND_STR_CASE(GET_DROPPED_PACKET_LOG);
556 MLX5_COMMAND_STR_CASE(QUERY_MAD_DEMUX);
557 MLX5_COMMAND_STR_CASE(SET_MAD_DEMUX);
558 MLX5_COMMAND_STR_CASE(NOP);
559 MLX5_COMMAND_STR_CASE(ALLOC_XRCD);
560 MLX5_COMMAND_STR_CASE(DEALLOC_XRCD);
561 MLX5_COMMAND_STR_CASE(ALLOC_TRANSPORT_DOMAIN);
562 MLX5_COMMAND_STR_CASE(DEALLOC_TRANSPORT_DOMAIN);
563 MLX5_COMMAND_STR_CASE(QUERY_CONG_STATUS);
564 MLX5_COMMAND_STR_CASE(MODIFY_CONG_STATUS);
565 MLX5_COMMAND_STR_CASE(QUERY_CONG_PARAMS);
566 MLX5_COMMAND_STR_CASE(MODIFY_CONG_PARAMS);
567 MLX5_COMMAND_STR_CASE(QUERY_CONG_STATISTICS);
568 MLX5_COMMAND_STR_CASE(ADD_VXLAN_UDP_DPORT);
569 MLX5_COMMAND_STR_CASE(DELETE_VXLAN_UDP_DPORT);
570 MLX5_COMMAND_STR_CASE(SET_L2_TABLE_ENTRY);
571 MLX5_COMMAND_STR_CASE(QUERY_L2_TABLE_ENTRY);
572 MLX5_COMMAND_STR_CASE(DELETE_L2_TABLE_ENTRY);
573 MLX5_COMMAND_STR_CASE(CREATE_RMP);
574 MLX5_COMMAND_STR_CASE(MODIFY_RMP);
575 MLX5_COMMAND_STR_CASE(DESTROY_RMP);
576 MLX5_COMMAND_STR_CASE(QUERY_RMP);
577 MLX5_COMMAND_STR_CASE(CREATE_RQT);
578 MLX5_COMMAND_STR_CASE(MODIFY_RQT);
579 MLX5_COMMAND_STR_CASE(DESTROY_RQT);
580 MLX5_COMMAND_STR_CASE(QUERY_RQT);
581 MLX5_COMMAND_STR_CASE(ACCESS_REG);
582 MLX5_COMMAND_STR_CASE(CREATE_SQ);
583 MLX5_COMMAND_STR_CASE(MODIFY_SQ);
584 MLX5_COMMAND_STR_CASE(DESTROY_SQ);
585 MLX5_COMMAND_STR_CASE(QUERY_SQ);
586 MLX5_COMMAND_STR_CASE(CREATE_RQ);
587 MLX5_COMMAND_STR_CASE(MODIFY_RQ);
588 MLX5_COMMAND_STR_CASE(DESTROY_RQ);
589 MLX5_COMMAND_STR_CASE(QUERY_RQ);
590 MLX5_COMMAND_STR_CASE(CREATE_TIR);
591 MLX5_COMMAND_STR_CASE(MODIFY_TIR);
592 MLX5_COMMAND_STR_CASE(DESTROY_TIR);
593 MLX5_COMMAND_STR_CASE(QUERY_TIR);
594 MLX5_COMMAND_STR_CASE(CREATE_TIS);
595 MLX5_COMMAND_STR_CASE(MODIFY_TIS);
596 MLX5_COMMAND_STR_CASE(DESTROY_TIS);
597 MLX5_COMMAND_STR_CASE(QUERY_TIS);
598 MLX5_COMMAND_STR_CASE(CREATE_FLOW_TABLE);
599 MLX5_COMMAND_STR_CASE(DESTROY_FLOW_TABLE);
600 MLX5_COMMAND_STR_CASE(QUERY_FLOW_TABLE);
601 MLX5_COMMAND_STR_CASE(CREATE_FLOW_GROUP);
602 MLX5_COMMAND_STR_CASE(DESTROY_FLOW_GROUP);
603 MLX5_COMMAND_STR_CASE(QUERY_FLOW_GROUP);
604 MLX5_COMMAND_STR_CASE(SET_FLOW_TABLE_ENTRY);
605 MLX5_COMMAND_STR_CASE(QUERY_FLOW_TABLE_ENTRY);
606 MLX5_COMMAND_STR_CASE(DELETE_FLOW_TABLE_ENTRY);
607 MLX5_COMMAND_STR_CASE(SET_DIAGNOSTICS);
608 MLX5_COMMAND_STR_CASE(QUERY_DIAGNOSTICS);
609 default: return "unknown command opcode";
610 }
611 }
612
cmd_status_str(u8 status)613 static const char *cmd_status_str(u8 status)
614 {
615 switch (status) {
616 case MLX5_CMD_STAT_OK:
617 return "OK";
618 case MLX5_CMD_STAT_INT_ERR:
619 return "internal error";
620 case MLX5_CMD_STAT_BAD_OP_ERR:
621 return "bad operation";
622 case MLX5_CMD_STAT_BAD_PARAM_ERR:
623 return "bad parameter";
624 case MLX5_CMD_STAT_BAD_SYS_STATE_ERR:
625 return "bad system state";
626 case MLX5_CMD_STAT_BAD_RES_ERR:
627 return "bad resource";
628 case MLX5_CMD_STAT_RES_BUSY:
629 return "resource busy";
630 case MLX5_CMD_STAT_LIM_ERR:
631 return "limits exceeded";
632 case MLX5_CMD_STAT_BAD_RES_STATE_ERR:
633 return "bad resource state";
634 case MLX5_CMD_STAT_IX_ERR:
635 return "bad index";
636 case MLX5_CMD_STAT_NO_RES_ERR:
637 return "no resources";
638 case MLX5_CMD_STAT_BAD_INP_LEN_ERR:
639 return "bad input length";
640 case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR:
641 return "bad output length";
642 case MLX5_CMD_STAT_BAD_QP_STATE_ERR:
643 return "bad QP state";
644 case MLX5_CMD_STAT_BAD_PKT_ERR:
645 return "bad packet (discarded)";
646 case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR:
647 return "bad size too many outstanding CQEs";
648 default:
649 return "unknown status";
650 }
651 }
652
cmd_status_to_err_helper(u8 status)653 static int cmd_status_to_err_helper(u8 status)
654 {
655 switch (status) {
656 case MLX5_CMD_STAT_OK: return 0;
657 case MLX5_CMD_STAT_INT_ERR: return -EIO;
658 case MLX5_CMD_STAT_BAD_OP_ERR: return -EINVAL;
659 case MLX5_CMD_STAT_BAD_PARAM_ERR: return -EINVAL;
660 case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: return -EIO;
661 case MLX5_CMD_STAT_BAD_RES_ERR: return -EINVAL;
662 case MLX5_CMD_STAT_RES_BUSY: return -EBUSY;
663 case MLX5_CMD_STAT_LIM_ERR: return -ENOMEM;
664 case MLX5_CMD_STAT_BAD_RES_STATE_ERR: return -EINVAL;
665 case MLX5_CMD_STAT_IX_ERR: return -EINVAL;
666 case MLX5_CMD_STAT_NO_RES_ERR: return -EAGAIN;
667 case MLX5_CMD_STAT_BAD_INP_LEN_ERR: return -EIO;
668 case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: return -EIO;
669 case MLX5_CMD_STAT_BAD_QP_STATE_ERR: return -EINVAL;
670 case MLX5_CMD_STAT_BAD_PKT_ERR: return -EINVAL;
671 case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: return -EINVAL;
672 default: return -EIO;
673 }
674 }
675
mlx5_cmd_mbox_status(void * out,u8 * status,u32 * syndrome)676 void mlx5_cmd_mbox_status(void *out, u8 *status, u32 *syndrome)
677 {
678 *status = MLX5_GET(mbox_out, out, status);
679 *syndrome = MLX5_GET(mbox_out, out, syndrome);
680 }
681
mlx5_cmd_check(struct mlx5_core_dev * dev,void * in,void * out)682 static int mlx5_cmd_check(struct mlx5_core_dev *dev, void *in, void *out)
683 {
684 u32 syndrome;
685 u8 status;
686 u16 opcode;
687 u16 op_mod;
688
689 mlx5_cmd_mbox_status(out, &status, &syndrome);
690 if (!status)
691 return 0;
692
693 opcode = MLX5_GET(mbox_in, in, opcode);
694 op_mod = MLX5_GET(mbox_in, in, op_mod);
695
696 mlx5_core_err(dev,
697 "%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x)\n",
698 mlx5_command_str(opcode),
699 opcode, op_mod,
700 cmd_status_str(status),
701 status,
702 syndrome);
703
704 return cmd_status_to_err_helper(status);
705 }
706
dump_command(struct mlx5_core_dev * dev,struct mlx5_cmd_work_ent * ent,int input)707 static void dump_command(struct mlx5_core_dev *dev,
708 struct mlx5_cmd_work_ent *ent, int input)
709 {
710 struct mlx5_cmd_msg *msg = input ? ent->in : ent->out;
711 u16 op = MLX5_GET(mbox_in, ent->lay->in, opcode);
712 size_t i;
713 int data_only;
714 int offset = 0;
715 int msg_len = input ? ent->uin_size : ent->uout_size;
716 int dump_len;
717
718 data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA));
719
720 if (data_only)
721 mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA,
722 "dump command data %s(0x%x) %s\n",
723 mlx5_command_str(op), op,
724 input ? "INPUT" : "OUTPUT");
725 else
726 mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n",
727 mlx5_command_str(op), op,
728 input ? "INPUT" : "OUTPUT");
729
730 if (data_only) {
731 if (input) {
732 dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset);
733 offset += sizeof(ent->lay->in);
734 } else {
735 dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset);
736 offset += sizeof(ent->lay->out);
737 }
738 } else {
739 dump_buf(ent->lay, sizeof(*ent->lay), 0, offset);
740 offset += sizeof(*ent->lay);
741 }
742
743 for (i = 0; i != (msg->numpages * MLX5_NUM_CMDS_IN_ADAPTER_PAGE); i++) {
744 struct mlx5_cmd_prot_block *block;
745
746 block = mlx5_fwp_get_virt(msg, i * MLX5_CMD_MBOX_SIZE);
747
748 if (data_only) {
749 if (offset >= msg_len)
750 break;
751 dump_len = min_t(int,
752 MLX5_CMD_DATA_BLOCK_SIZE, msg_len - offset);
753
754 dump_buf(block->data, dump_len, 1, offset);
755 offset += MLX5_CMD_DATA_BLOCK_SIZE;
756 } else {
757 mlx5_core_dbg(dev, "command block:\n");
758 dump_buf(block, sizeof(*block), 0, offset);
759 offset += sizeof(*block);
760 }
761
762 /* check for last block */
763 if (block->next == 0)
764 break;
765 }
766
767 if (data_only)
768 pr_debug("\n");
769 }
770
msg_to_opcode(struct mlx5_cmd_msg * in)771 static u16 msg_to_opcode(struct mlx5_cmd_msg *in)
772 {
773 return MLX5_GET(mbox_in, in->first.data, opcode);
774 }
775
cb_timeout_handler(struct work_struct * work)776 static void cb_timeout_handler(struct work_struct *work)
777 {
778 struct delayed_work *dwork = container_of(work, struct delayed_work,
779 work);
780 struct mlx5_cmd_work_ent *ent = container_of(dwork,
781 struct mlx5_cmd_work_ent,
782 cb_timeout_work);
783 struct mlx5_core_dev *dev = container_of(ent->cmd, struct mlx5_core_dev,
784 cmd);
785
786 ent->ret = -ETIMEDOUT;
787 mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n",
788 mlx5_command_str(msg_to_opcode(ent->in)),
789 msg_to_opcode(ent->in));
790 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, MLX5_CMD_MODE_EVENTS);
791 }
792
complete_command(struct mlx5_cmd_work_ent * ent)793 static void complete_command(struct mlx5_cmd_work_ent *ent)
794 {
795 struct mlx5_cmd *cmd = ent->cmd;
796 struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev,
797 cmd);
798 mlx5_cmd_cbk_t callback;
799 void *context;
800
801 s64 ds;
802 struct mlx5_cmd_stats *stats;
803 unsigned long flags;
804 int err;
805 struct semaphore *sem;
806
807 if (ent->page_queue)
808 sem = &cmd->pages_sem;
809 else
810 sem = &cmd->sem;
811
812 if (dev->state != MLX5_DEVICE_STATE_UP) {
813 u8 status = 0;
814 u32 drv_synd;
815
816 ent->ret = mlx5_internal_err_ret_value(dev, msg_to_opcode(ent->in), &drv_synd, &status);
817 MLX5_SET(mbox_out, ent->out, status, status);
818 MLX5_SET(mbox_out, ent->out, syndrome, drv_synd);
819 }
820
821 if (ent->callback) {
822 ds = ent->ts2 - ent->ts1;
823 if (ent->op < ARRAY_SIZE(cmd->stats)) {
824 stats = &cmd->stats[ent->op];
825 spin_lock_irqsave(&stats->lock, flags);
826 stats->sum += ds;
827 ++stats->n;
828 spin_unlock_irqrestore(&stats->lock, flags);
829 }
830
831 callback = ent->callback;
832 context = ent->context;
833 err = ent->ret;
834 if (!err) {
835 err = mlx5_copy_from_msg(ent->uout,
836 ent->out,
837 ent->uout_size);
838 err = err ? err : mlx5_cmd_check(dev,
839 ent->in->first.data,
840 ent->uout);
841 }
842
843 mlx5_free_cmd_msg(dev, ent->out);
844 free_msg(dev, ent->in);
845
846 err = err ? err : ent->status;
847 free_cmd(ent);
848 callback(err, context);
849 } else {
850 complete(&ent->done);
851 }
852 up(sem);
853 }
854
cmd_work_handler(struct work_struct * work)855 static void cmd_work_handler(struct work_struct *work)
856 {
857 struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work);
858 struct mlx5_cmd *cmd = ent->cmd;
859 struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev, cmd);
860 unsigned long cb_timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC);
861 struct mlx5_cmd_layout *lay;
862 struct semaphore *sem;
863 bool poll_cmd = ent->polling;
864
865 sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem;
866 down(sem);
867
868 if (alloc_ent(ent) < 0) {
869 complete_command(ent);
870 return;
871 }
872
873 ent->token = alloc_token(cmd);
874 lay = get_inst(cmd, ent->idx);
875 ent->lay = lay;
876 memset(lay, 0, sizeof(*lay));
877 memcpy(lay->in, ent->in->first.data, sizeof(lay->in));
878 ent->op = be32_to_cpu(lay->in[0]) >> 16;
879 if (ent->in->numpages != 0)
880 lay->in_ptr = cpu_to_be64(mlx5_fwp_get_dma(ent->in, 0));
881 if (ent->out->numpages != 0)
882 lay->out_ptr = cpu_to_be64(mlx5_fwp_get_dma(ent->out, 0));
883 lay->inlen = cpu_to_be32(ent->uin_size);
884 lay->outlen = cpu_to_be32(ent->uout_size);
885 lay->type = MLX5_PCI_CMD_XPORT;
886 lay->token = ent->token;
887 lay->status_own = CMD_OWNER_HW;
888 set_signature(ent, !cmd->checksum_disabled);
889 dump_command(dev, ent, 1);
890 ent->ts1 = ktime_get_ns();
891 ent->busy = 0;
892 if (ent->callback)
893 schedule_delayed_work(&ent->cb_timeout_work, cb_timeout);
894
895 /* ring doorbell after the descriptor is valid */
896 mlx5_core_dbg(dev, "writing 0x%x to command doorbell\n", 1 << ent->idx);
897 /* make sure data is written to RAM */
898 mlx5_fwp_flush(cmd->cmd_page);
899 iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell);
900 mmiowb();
901
902 /* if not in polling don't use ent after this point */
903 if (poll_cmd) {
904 poll_timeout(ent);
905 /* make sure we read the descriptor after ownership is SW */
906 mlx5_cmd_comp_handler(dev, 1U << ent->idx, MLX5_CMD_MODE_POLLING);
907 }
908 }
909
deliv_status_to_str(u8 status)910 static const char *deliv_status_to_str(u8 status)
911 {
912 switch (status) {
913 case MLX5_CMD_DELIVERY_STAT_OK:
914 return "no errors";
915 case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR:
916 return "signature error";
917 case MLX5_CMD_DELIVERY_STAT_TOK_ERR:
918 return "token error";
919 case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR:
920 return "bad block number";
921 case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR:
922 return "output pointer not aligned to block size";
923 case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR:
924 return "input pointer not aligned to block size";
925 case MLX5_CMD_DELIVERY_STAT_FW_ERR:
926 return "firmware internal error";
927 case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR:
928 return "command input length error";
929 case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR:
930 return "command ouput length error";
931 case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR:
932 return "reserved fields not cleared";
933 case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR:
934 return "bad command descriptor type";
935 default:
936 return "unknown status code";
937 }
938 }
939
wait_func(struct mlx5_core_dev * dev,struct mlx5_cmd_work_ent * ent)940 static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent)
941 {
942 int timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC);
943 int err;
944
945 if (ent->polling) {
946 wait_for_completion(&ent->done);
947 } else if (!wait_for_completion_timeout(&ent->done, timeout)) {
948 ent->ret = -ETIMEDOUT;
949 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, MLX5_CMD_MODE_EVENTS);
950 }
951
952 err = ent->ret;
953
954 if (err == -ETIMEDOUT) {
955 mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n",
956 mlx5_command_str(msg_to_opcode(ent->in)),
957 msg_to_opcode(ent->in));
958 }
959 mlx5_core_dbg(dev, "err %d, delivery status %s(%d)\n",
960 err, deliv_status_to_str(ent->status), ent->status);
961
962 return err;
963 }
964
965 /* Notes:
966 * 1. Callback functions may not sleep
967 * 2. page queue commands do not support asynchrous completion
968 */
mlx5_cmd_invoke(struct mlx5_core_dev * dev,struct mlx5_cmd_msg * in,int uin_size,struct mlx5_cmd_msg * out,void * uout,int uout_size,mlx5_cmd_cbk_t callback,void * context,int page_queue,u8 * status,bool force_polling)969 static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in,
970 int uin_size,
971 struct mlx5_cmd_msg *out, void *uout, int uout_size,
972 mlx5_cmd_cbk_t callback,
973 void *context, int page_queue, u8 *status,
974 bool force_polling)
975 {
976 struct mlx5_cmd *cmd = &dev->cmd;
977 struct mlx5_cmd_work_ent *ent;
978 struct mlx5_cmd_stats *stats;
979 int err = 0;
980 s64 ds;
981 u16 op;
982
983 if (callback && page_queue)
984 return -EINVAL;
985
986 ent = alloc_cmd(cmd, in, uin_size, out, uout, uout_size, callback,
987 context, page_queue);
988 if (IS_ERR(ent))
989 return PTR_ERR(ent);
990
991 ent->polling = force_polling || (cmd->mode == MLX5_CMD_MODE_POLLING);
992
993 if (!callback)
994 init_completion(&ent->done);
995
996 INIT_DELAYED_WORK(&ent->cb_timeout_work, cb_timeout_handler);
997 INIT_WORK(&ent->work, cmd_work_handler);
998 if (page_queue) {
999 cmd_work_handler(&ent->work);
1000 } else if (!queue_work(dev->priv.health.wq_cmd, &ent->work)) {
1001 mlx5_core_warn(dev, "failed to queue work\n");
1002 err = -ENOMEM;
1003 goto out_free;
1004 }
1005
1006 if (callback)
1007 goto out;
1008
1009 err = wait_func(dev, ent);
1010 if (err == -ETIMEDOUT)
1011 goto out;
1012
1013 ds = ent->ts2 - ent->ts1;
1014 op = MLX5_GET(mbox_in, in->first.data, opcode);
1015 if (op < ARRAY_SIZE(cmd->stats)) {
1016 stats = &cmd->stats[op];
1017 spin_lock_irq(&stats->lock);
1018 stats->sum += ds;
1019 ++stats->n;
1020 spin_unlock_irq(&stats->lock);
1021 }
1022 mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME,
1023 "fw exec time for %s is %lld nsec\n",
1024 mlx5_command_str(op), (long long)ds);
1025 *status = ent->status;
1026 free_cmd(ent);
1027
1028 return err;
1029
1030 out_free:
1031 free_cmd(ent);
1032 out:
1033 return err;
1034 }
1035
mlx5_copy_to_msg(struct mlx5_cmd_msg * to,void * from,size_t size)1036 static int mlx5_copy_to_msg(struct mlx5_cmd_msg *to, void *from, size_t size)
1037 {
1038 size_t delta;
1039 size_t i;
1040
1041 if (to == NULL || from == NULL)
1042 return (-ENOMEM);
1043
1044 delta = min_t(size_t, size, sizeof(to->first.data));
1045 memcpy(to->first.data, from, delta);
1046 from = (char *)from + delta;
1047 size -= delta;
1048
1049 for (i = 0; size != 0; i++) {
1050 struct mlx5_cmd_prot_block *block;
1051
1052 block = mlx5_fwp_get_virt(to, i * MLX5_CMD_MBOX_SIZE);
1053
1054 delta = min_t(size_t, size, MLX5_CMD_DATA_BLOCK_SIZE);
1055 memcpy(block->data, from, delta);
1056 from = (char *)from + delta;
1057 size -= delta;
1058 }
1059 return (0);
1060 }
1061
mlx5_copy_from_msg(void * to,struct mlx5_cmd_msg * from,int size)1062 static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size)
1063 {
1064 size_t delta;
1065 size_t i;
1066
1067 if (to == NULL || from == NULL)
1068 return (-ENOMEM);
1069
1070 delta = min_t(size_t, size, sizeof(from->first.data));
1071 memcpy(to, from->first.data, delta);
1072 to = (char *)to + delta;
1073 size -= delta;
1074
1075 for (i = 0; size != 0; i++) {
1076 struct mlx5_cmd_prot_block *block;
1077
1078 block = mlx5_fwp_get_virt(from, i * MLX5_CMD_MBOX_SIZE);
1079
1080 delta = min_t(size_t, size, MLX5_CMD_DATA_BLOCK_SIZE);
1081 memcpy(to, block->data, delta);
1082 to = (char *)to + delta;
1083 size -= delta;
1084 }
1085 return (0);
1086 }
1087
1088 static struct mlx5_cmd_msg *
mlx5_alloc_cmd_msg(struct mlx5_core_dev * dev,gfp_t flags,size_t size)1089 mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev, gfp_t flags, size_t size)
1090 {
1091 struct mlx5_cmd_msg *msg;
1092 size_t blen;
1093 size_t n;
1094 size_t i;
1095
1096 blen = size - min_t(size_t, sizeof(msg->first.data), size);
1097 n = howmany(blen, MLX5_CMD_DATA_BLOCK_SIZE);
1098
1099 msg = mlx5_fwp_alloc(dev, flags, howmany(n, MLX5_NUM_CMDS_IN_ADAPTER_PAGE));
1100 if (msg == NULL)
1101 return (ERR_PTR(-ENOMEM));
1102
1103 for (i = 0; i != n; i++) {
1104 struct mlx5_cmd_prot_block *block;
1105
1106 block = mlx5_fwp_get_virt(msg, i * MLX5_CMD_MBOX_SIZE);
1107
1108 memset(block, 0, MLX5_CMD_MBOX_SIZE);
1109
1110 if (i != (n - 1)) {
1111 u64 dma = mlx5_fwp_get_dma(msg, (i + 1) * MLX5_CMD_MBOX_SIZE);
1112 block->next = cpu_to_be64(dma);
1113 }
1114 block->block_num = cpu_to_be32(i);
1115 }
1116
1117 /* make sure initial data is written to RAM */
1118 mlx5_fwp_flush(msg);
1119
1120 return (msg);
1121 }
1122
1123 static void
mlx5_free_cmd_msg(struct mlx5_core_dev * dev,struct mlx5_cmd_msg * msg)1124 mlx5_free_cmd_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg)
1125 {
1126
1127 mlx5_fwp_free(msg);
1128 }
1129
clean_debug_files(struct mlx5_core_dev * dev)1130 static void clean_debug_files(struct mlx5_core_dev *dev)
1131 {
1132 }
1133
1134
mlx5_cmd_change_mod(struct mlx5_core_dev * dev,int mode)1135 static void mlx5_cmd_change_mod(struct mlx5_core_dev *dev, int mode)
1136 {
1137 struct mlx5_cmd *cmd = &dev->cmd;
1138 int i;
1139
1140 if (cmd->mode == mode)
1141 return;
1142
1143 for (i = 0; i < cmd->max_reg_cmds; i++)
1144 down(&cmd->sem);
1145
1146 down(&cmd->pages_sem);
1147 cmd->mode = mode;
1148
1149 up(&cmd->pages_sem);
1150 for (i = 0; i < cmd->max_reg_cmds; i++)
1151 up(&cmd->sem);
1152 }
1153
mlx5_cmd_use_events(struct mlx5_core_dev * dev)1154 void mlx5_cmd_use_events(struct mlx5_core_dev *dev)
1155 {
1156 mlx5_cmd_change_mod(dev, MLX5_CMD_MODE_EVENTS);
1157 }
1158
mlx5_cmd_use_polling(struct mlx5_core_dev * dev)1159 void mlx5_cmd_use_polling(struct mlx5_core_dev *dev)
1160 {
1161 mlx5_cmd_change_mod(dev, MLX5_CMD_MODE_POLLING);
1162 }
1163
free_msg(struct mlx5_core_dev * dev,struct mlx5_cmd_msg * msg)1164 static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg)
1165 {
1166 unsigned long flags;
1167
1168 if (msg->cache) {
1169 spin_lock_irqsave(&msg->cache->lock, flags);
1170 list_add_tail(&msg->list, &msg->cache->head);
1171 spin_unlock_irqrestore(&msg->cache->lock, flags);
1172 } else {
1173 mlx5_free_cmd_msg(dev, msg);
1174 }
1175 }
1176
mlx5_cmd_comp_handler(struct mlx5_core_dev * dev,u64 vector_flags,enum mlx5_cmd_mode cmd_mode)1177 void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vector_flags,
1178 enum mlx5_cmd_mode cmd_mode)
1179 {
1180 struct mlx5_cmd *cmd = &dev->cmd;
1181 struct mlx5_cmd_work_ent *ent;
1182 bool triggered = (vector_flags & MLX5_TRIGGERED_CMD_COMP) ? 1 : 0;
1183 u32 vector = vector_flags; /* discard flags in the upper dword */
1184 int i;
1185
1186 /* make sure data gets read from RAM */
1187 mlx5_fwp_invalidate(cmd->cmd_page);
1188
1189 while (vector != 0) {
1190 i = ffs(vector) - 1;
1191 vector &= ~(1U << i);
1192 /* check command mode */
1193 if (cmd->ent_mode[i] != cmd_mode)
1194 continue;
1195 ent = cmd->ent_arr[i];
1196 /* check if command was already handled */
1197 if (ent == NULL)
1198 continue;
1199 if (ent->callback)
1200 cancel_delayed_work(&ent->cb_timeout_work);
1201 ent->ts2 = ktime_get_ns();
1202 memcpy(ent->out->first.data, ent->lay->out,
1203 sizeof(ent->lay->out));
1204 /* make sure data gets read from RAM */
1205 mlx5_fwp_invalidate(ent->out);
1206 dump_command(dev, ent, 0);
1207 if (!ent->ret) {
1208 if (!cmd->checksum_disabled)
1209 ent->ret = verify_signature(ent);
1210 else
1211 ent->ret = 0;
1212
1213 if (triggered)
1214 ent->status = MLX5_DRIVER_STATUS_ABORTED;
1215 else
1216 ent->status = ent->lay->status_own >> 1;
1217
1218 mlx5_core_dbg(dev,
1219 "FW command ret 0x%x, status %s(0x%x)\n",
1220 ent->ret,
1221 deliv_status_to_str(ent->status),
1222 ent->status);
1223 }
1224 free_ent(cmd, ent->idx);
1225 complete_command(ent);
1226 }
1227 }
1228 EXPORT_SYMBOL(mlx5_cmd_comp_handler);
1229
status_to_err(u8 status)1230 static int status_to_err(u8 status)
1231 {
1232 return status ? -EIO : 0; /* TBD more meaningful codes */
1233 }
1234
alloc_msg(struct mlx5_core_dev * dev,int in_size,gfp_t gfp)1235 static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size,
1236 gfp_t gfp)
1237 {
1238 struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM);
1239 struct mlx5_cmd *cmd = &dev->cmd;
1240 struct cache_ent *ent = NULL;
1241
1242 if (in_size > MED_LIST_SIZE && in_size <= LONG_LIST_SIZE)
1243 ent = &cmd->cache.large;
1244 else if (in_size > 16 && in_size <= MED_LIST_SIZE)
1245 ent = &cmd->cache.med;
1246
1247 if (ent) {
1248 spin_lock_irq(&ent->lock);
1249 if (!list_empty(&ent->head)) {
1250 msg = list_entry(ent->head.next, struct mlx5_cmd_msg,
1251 list);
1252 list_del(&msg->list);
1253 }
1254 spin_unlock_irq(&ent->lock);
1255 }
1256
1257 if (IS_ERR(msg))
1258 msg = mlx5_alloc_cmd_msg(dev, gfp, in_size);
1259
1260 return msg;
1261 }
1262
is_manage_pages(void * in)1263 static int is_manage_pages(void *in)
1264 {
1265 return MLX5_GET(mbox_in, in, opcode) == MLX5_CMD_OP_MANAGE_PAGES;
1266 }
1267
cmd_exec_helper(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)1268 static int cmd_exec_helper(struct mlx5_core_dev *dev,
1269 void *in, int in_size,
1270 void *out, int out_size,
1271 mlx5_cmd_cbk_t callback, void *context,
1272 bool force_polling)
1273 {
1274 struct mlx5_cmd_msg *inb;
1275 struct mlx5_cmd_msg *outb;
1276 int pages_queue;
1277 const gfp_t gfp = GFP_KERNEL;
1278 int err;
1279 u8 status = 0;
1280 u32 drv_synd;
1281
1282 if (pci_channel_offline(dev->pdev) ||
1283 dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {
1284 u16 opcode = MLX5_GET(mbox_in, in, opcode);
1285 err = mlx5_internal_err_ret_value(dev, opcode, &drv_synd, &status);
1286 MLX5_SET(mbox_out, out, status, status);
1287 MLX5_SET(mbox_out, out, syndrome, drv_synd);
1288 return err;
1289 }
1290
1291 pages_queue = is_manage_pages(in);
1292
1293 inb = alloc_msg(dev, in_size, gfp);
1294 if (IS_ERR(inb)) {
1295 err = PTR_ERR(inb);
1296 return err;
1297 }
1298
1299 err = mlx5_copy_to_msg(inb, in, in_size);
1300 if (err) {
1301 mlx5_core_warn(dev, "err %d\n", err);
1302 goto out_in;
1303 }
1304
1305 outb = mlx5_alloc_cmd_msg(dev, gfp, out_size);
1306 if (IS_ERR(outb)) {
1307 err = PTR_ERR(outb);
1308 goto out_in;
1309 }
1310
1311 err = mlx5_cmd_invoke(dev, inb, in_size, outb, out, out_size, callback,
1312 context, pages_queue, &status, force_polling);
1313 if (err) {
1314 if (err == -ETIMEDOUT)
1315 return err;
1316 goto out_out;
1317 }
1318
1319 mlx5_core_dbg(dev, "err %d, status %d\n", err, status);
1320 if (status) {
1321 err = status_to_err(status);
1322 goto out_out;
1323 }
1324
1325 if (callback)
1326 return err;
1327
1328 err = mlx5_copy_from_msg(out, outb, out_size);
1329
1330 out_out:
1331 mlx5_free_cmd_msg(dev, outb);
1332
1333 out_in:
1334 free_msg(dev, inb);
1335 return err;
1336 }
1337
mlx5_cmd_exec(struct mlx5_core_dev * dev,void * in,int in_size,void * out,int out_size)1338 int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out,
1339 int out_size)
1340 {
1341 int err;
1342
1343 err = cmd_exec_helper(dev, in, in_size, out, out_size, NULL, NULL, false);
1344 return err ? : mlx5_cmd_check(dev, in, out);
1345 }
1346 EXPORT_SYMBOL(mlx5_cmd_exec);
1347
mlx5_cmd_exec_cb(struct mlx5_core_dev * dev,void * in,int in_size,void * out,int out_size,mlx5_cmd_cbk_t callback,void * context)1348 int mlx5_cmd_exec_cb(struct mlx5_core_dev *dev, void *in, int in_size,
1349 void *out, int out_size, mlx5_cmd_cbk_t callback,
1350 void *context)
1351 {
1352 return cmd_exec_helper(dev, in, in_size, out, out_size, callback, context, false);
1353 }
1354 EXPORT_SYMBOL(mlx5_cmd_exec_cb);
1355
mlx5_cmd_exec_polling(struct mlx5_core_dev * dev,void * in,int in_size,void * out,int out_size)1356 int mlx5_cmd_exec_polling(struct mlx5_core_dev *dev, void *in, int in_size,
1357 void *out, int out_size)
1358 {
1359 int err;
1360
1361 err = cmd_exec_helper(dev, in, in_size, out, out_size, NULL, NULL, true);
1362 return err ? : mlx5_cmd_check(dev, in, out);
1363 }
1364 EXPORT_SYMBOL(mlx5_cmd_exec_polling);
1365
destroy_msg_cache(struct mlx5_core_dev * dev)1366 static void destroy_msg_cache(struct mlx5_core_dev *dev)
1367 {
1368 struct mlx5_cmd *cmd = &dev->cmd;
1369 struct mlx5_cmd_msg *msg;
1370 struct mlx5_cmd_msg *n;
1371
1372 list_for_each_entry_safe(msg, n, &cmd->cache.large.head, list) {
1373 list_del(&msg->list);
1374 mlx5_free_cmd_msg(dev, msg);
1375 }
1376
1377 list_for_each_entry_safe(msg, n, &cmd->cache.med.head, list) {
1378 list_del(&msg->list);
1379 mlx5_free_cmd_msg(dev, msg);
1380 }
1381 }
1382
create_msg_cache(struct mlx5_core_dev * dev)1383 static int create_msg_cache(struct mlx5_core_dev *dev)
1384 {
1385 struct mlx5_cmd *cmd = &dev->cmd;
1386 struct mlx5_cmd_msg *msg;
1387 int err;
1388 int i;
1389
1390 spin_lock_init(&cmd->cache.large.lock);
1391 INIT_LIST_HEAD(&cmd->cache.large.head);
1392 spin_lock_init(&cmd->cache.med.lock);
1393 INIT_LIST_HEAD(&cmd->cache.med.head);
1394
1395 for (i = 0; i < NUM_LONG_LISTS; i++) {
1396 msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, LONG_LIST_SIZE);
1397 if (IS_ERR(msg)) {
1398 err = PTR_ERR(msg);
1399 goto ex_err;
1400 }
1401 msg->cache = &cmd->cache.large;
1402 list_add_tail(&msg->list, &cmd->cache.large.head);
1403 }
1404
1405 for (i = 0; i < NUM_MED_LISTS; i++) {
1406 msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, MED_LIST_SIZE);
1407 if (IS_ERR(msg)) {
1408 err = PTR_ERR(msg);
1409 goto ex_err;
1410 }
1411 msg->cache = &cmd->cache.med;
1412 list_add_tail(&msg->list, &cmd->cache.med.head);
1413 }
1414
1415 return 0;
1416
1417 ex_err:
1418 destroy_msg_cache(dev);
1419 return err;
1420 }
1421
1422 static int
alloc_cmd_page(struct mlx5_core_dev * dev,struct mlx5_cmd * cmd)1423 alloc_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd)
1424 {
1425 int err;
1426
1427 sx_init(&cmd->dma_sx, "MLX5-DMA-SX");
1428 mtx_init(&cmd->dma_mtx, "MLX5-DMA-MTX", NULL, MTX_DEF);
1429 cv_init(&cmd->dma_cv, "MLX5-DMA-CV");
1430
1431 /*
1432 * Create global DMA descriptor tag for allocating
1433 * 4K firmware pages:
1434 */
1435 err = -bus_dma_tag_create(
1436 bus_get_dma_tag(dev->pdev->dev.bsddev),
1437 MLX5_ADAPTER_PAGE_SIZE, /* alignment */
1438 0, /* no boundary */
1439 BUS_SPACE_MAXADDR, /* lowaddr */
1440 BUS_SPACE_MAXADDR, /* highaddr */
1441 NULL, NULL, /* filter, filterarg */
1442 MLX5_ADAPTER_PAGE_SIZE, /* maxsize */
1443 1, /* nsegments */
1444 MLX5_ADAPTER_PAGE_SIZE, /* maxsegsize */
1445 0, /* flags */
1446 NULL, NULL, /* lockfunc, lockfuncarg */
1447 &cmd->dma_tag);
1448 if (err != 0)
1449 goto failure_destroy_sx;
1450
1451 cmd->cmd_page = mlx5_fwp_alloc(dev, GFP_KERNEL, 1);
1452 if (cmd->cmd_page == NULL) {
1453 err = -ENOMEM;
1454 goto failure_alloc_page;
1455 }
1456 cmd->dma = mlx5_fwp_get_dma(cmd->cmd_page, 0);
1457 cmd->cmd_buf = mlx5_fwp_get_virt(cmd->cmd_page, 0);
1458 return (0);
1459
1460 failure_alloc_page:
1461 bus_dma_tag_destroy(cmd->dma_tag);
1462
1463 failure_destroy_sx:
1464 cv_destroy(&cmd->dma_cv);
1465 mtx_destroy(&cmd->dma_mtx);
1466 sx_destroy(&cmd->dma_sx);
1467 return (err);
1468 }
1469
1470 static void
free_cmd_page(struct mlx5_core_dev * dev,struct mlx5_cmd * cmd)1471 free_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd)
1472 {
1473
1474 mlx5_fwp_free(cmd->cmd_page);
1475 bus_dma_tag_destroy(cmd->dma_tag);
1476 cv_destroy(&cmd->dma_cv);
1477 mtx_destroy(&cmd->dma_mtx);
1478 sx_destroy(&cmd->dma_sx);
1479 }
1480
mlx5_cmd_init(struct mlx5_core_dev * dev)1481 int mlx5_cmd_init(struct mlx5_core_dev *dev)
1482 {
1483 struct mlx5_cmd *cmd = &dev->cmd;
1484 u32 cmd_h, cmd_l;
1485 u16 cmd_if_rev;
1486 int err;
1487 int i;
1488
1489 memset(cmd, 0, sizeof(*cmd));
1490 cmd_if_rev = cmdif_rev_get(dev);
1491 if (cmd_if_rev != CMD_IF_REV) {
1492 mlx5_core_err(dev,
1493 "Driver cmdif rev(%d) differs from firmware's(%d)\n",
1494 CMD_IF_REV, cmd_if_rev);
1495 return -EINVAL;
1496 }
1497
1498 err = alloc_cmd_page(dev, cmd);
1499 if (err)
1500 goto err_free_pool;
1501
1502 cmd_l = ioread32be(&dev->iseg->cmdq_addr_l_sz) & 0xff;
1503 cmd->log_sz = cmd_l >> 4 & 0xf;
1504 cmd->log_stride = cmd_l & 0xf;
1505 if (1 << cmd->log_sz > MLX5_MAX_COMMANDS) {
1506 mlx5_core_err(dev,
1507 "firmware reports too many outstanding commands %d\n",
1508 1 << cmd->log_sz);
1509 err = -EINVAL;
1510 goto err_free_page;
1511 }
1512
1513 if (cmd->log_sz + cmd->log_stride > MLX5_ADAPTER_PAGE_SHIFT) {
1514 mlx5_core_err(dev,
1515 "command queue size overflow\n");
1516 err = -EINVAL;
1517 goto err_free_page;
1518 }
1519
1520 cmd->checksum_disabled = 1;
1521 cmd->max_reg_cmds = (1 << cmd->log_sz) - 1;
1522 cmd->bitmask = (1 << cmd->max_reg_cmds) - 1;
1523
1524 cmd->cmdif_rev = ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16;
1525 if (cmd->cmdif_rev > CMD_IF_REV) {
1526 mlx5_core_err(dev,
1527 "driver does not support command interface version. driver %d, firmware %d\n",
1528 CMD_IF_REV, cmd->cmdif_rev);
1529 err = -ENOTSUPP;
1530 goto err_free_page;
1531 }
1532
1533 spin_lock_init(&cmd->alloc_lock);
1534 spin_lock_init(&cmd->token_lock);
1535 for (i = 0; i < ARRAY_SIZE(cmd->stats); i++)
1536 spin_lock_init(&cmd->stats[i].lock);
1537
1538 sema_init(&cmd->sem, cmd->max_reg_cmds);
1539 sema_init(&cmd->pages_sem, 1);
1540
1541 cmd_h = (u32)((u64)(cmd->dma) >> 32);
1542 cmd_l = (u32)(cmd->dma);
1543 if (cmd_l & 0xfff) {
1544 mlx5_core_err(dev, "invalid command queue address\n");
1545 err = -ENOMEM;
1546 goto err_free_page;
1547 }
1548
1549 iowrite32be(cmd_h, &dev->iseg->cmdq_addr_h);
1550 iowrite32be(cmd_l, &dev->iseg->cmdq_addr_l_sz);
1551
1552 /* Make sure firmware sees the complete address before we proceed */
1553 wmb();
1554
1555 mlx5_core_dbg(dev, "descriptor at dma 0x%llx\n", (unsigned long long)(cmd->dma));
1556
1557 cmd->mode = MLX5_CMD_MODE_POLLING;
1558
1559 err = create_msg_cache(dev);
1560 if (err) {
1561 mlx5_core_err(dev, "failed to create command cache\n");
1562 goto err_free_page;
1563 }
1564 return 0;
1565
1566 err_free_page:
1567 free_cmd_page(dev, cmd);
1568
1569 err_free_pool:
1570 return err;
1571 }
1572 EXPORT_SYMBOL(mlx5_cmd_init);
1573
mlx5_cmd_cleanup(struct mlx5_core_dev * dev)1574 void mlx5_cmd_cleanup(struct mlx5_core_dev *dev)
1575 {
1576 struct mlx5_cmd *cmd = &dev->cmd;
1577
1578 clean_debug_files(dev);
1579 flush_workqueue(dev->priv.health.wq_cmd);
1580 destroy_msg_cache(dev);
1581 free_cmd_page(dev, cmd);
1582 }
1583 EXPORT_SYMBOL(mlx5_cmd_cleanup);
1584
mlx5_cmd_query_cong_counter(struct mlx5_core_dev * dev,bool reset,void * out,int out_size)1585 int mlx5_cmd_query_cong_counter(struct mlx5_core_dev *dev,
1586 bool reset, void *out, int out_size)
1587 {
1588 u32 in[MLX5_ST_SZ_DW(query_cong_statistics_in)] = { };
1589
1590 MLX5_SET(query_cong_statistics_in, in, opcode,
1591 MLX5_CMD_OP_QUERY_CONG_STATISTICS);
1592 MLX5_SET(query_cong_statistics_in, in, clear, reset);
1593 return mlx5_cmd_exec(dev, in, sizeof(in), out, out_size);
1594 }
1595 EXPORT_SYMBOL(mlx5_cmd_query_cong_counter);
1596
mlx5_cmd_query_cong_params(struct mlx5_core_dev * dev,int cong_point,void * out,int out_size)1597 int mlx5_cmd_query_cong_params(struct mlx5_core_dev *dev, int cong_point,
1598 void *out, int out_size)
1599 {
1600 u32 in[MLX5_ST_SZ_DW(query_cong_params_in)] = { };
1601
1602 MLX5_SET(query_cong_params_in, in, opcode,
1603 MLX5_CMD_OP_QUERY_CONG_PARAMS);
1604 MLX5_SET(query_cong_params_in, in, cong_protocol, cong_point);
1605
1606 return mlx5_cmd_exec(dev, in, sizeof(in), out, out_size);
1607 }
1608 EXPORT_SYMBOL(mlx5_cmd_query_cong_params);
1609
mlx5_cmd_modify_cong_params(struct mlx5_core_dev * dev,void * in,int in_size)1610 int mlx5_cmd_modify_cong_params(struct mlx5_core_dev *dev,
1611 void *in, int in_size)
1612 {
1613 u32 out[MLX5_ST_SZ_DW(modify_cong_params_out)] = { };
1614
1615 return mlx5_cmd_exec(dev, in, in_size, out, sizeof(out));
1616 }
1617 EXPORT_SYMBOL(mlx5_cmd_modify_cong_params);
1618