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