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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
49enum {
50 CMD_IF_REV = 5,
51};
52
53enum {
54 CMD_MODE_POLLING,
55 CMD_MODE_EVENTS
56};
57
58enum {
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
72static 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
98static 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
112static 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
126static 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
135static struct mlx5_cmd_layout *get_inst(struct mlx5_cmd *cmd, int idx)
136{
137 return cmd->cmd_buf + (idx << cmd->log_stride);
138}
139
140static 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
148static 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
161static 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
175static 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
184static 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
196static 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
205static 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
222static void free_cmd(struct mlx5_cmd_work_ent *ent)
223{
224 kfree(ent);
225}
226
227static 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
250static 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
266static 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_HOST_PARAMS:
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 *status = MLX5_DRIVER_STATUS_ABORTED;
450 *synd = MLX5_DRIVER_SYND;
451 return -EIO;
452 default:
453 mlx5_core_err(dev, "Unknown FW command (%d)\n", op);
454 return -EINVAL;
455 }
456}
457
458const char *mlx5_command_str(int command)
459{
460#define MLX5_COMMAND_STR_CASE(__cmd) case MLX5_CMD_OP_ ## __cmd: return #__cmd
461
462 switch (command) {
463 MLX5_COMMAND_STR_CASE(QUERY_HCA_CAP);
464 MLX5_COMMAND_STR_CASE(QUERY_ADAPTER);
465 MLX5_COMMAND_STR_CASE(INIT_HCA);
466 MLX5_COMMAND_STR_CASE(TEARDOWN_HCA);
467 MLX5_COMMAND_STR_CASE(ENABLE_HCA);
468 MLX5_COMMAND_STR_CASE(DISABLE_HCA);
469 MLX5_COMMAND_STR_CASE(QUERY_PAGES);
470 MLX5_COMMAND_STR_CASE(MANAGE_PAGES);
471 MLX5_COMMAND_STR_CASE(SET_HCA_CAP);
472 MLX5_COMMAND_STR_CASE(QUERY_ISSI);
473 MLX5_COMMAND_STR_CASE(SET_ISSI);
474 MLX5_COMMAND_STR_CASE(SET_DRIVER_VERSION);
475 MLX5_COMMAND_STR_CASE(CREATE_MKEY);
476 MLX5_COMMAND_STR_CASE(QUERY_MKEY);
477 MLX5_COMMAND_STR_CASE(DESTROY_MKEY);
478 MLX5_COMMAND_STR_CASE(QUERY_SPECIAL_CONTEXTS);
479 MLX5_COMMAND_STR_CASE(PAGE_FAULT_RESUME);
480 MLX5_COMMAND_STR_CASE(CREATE_EQ);
481 MLX5_COMMAND_STR_CASE(DESTROY_EQ);
482 MLX5_COMMAND_STR_CASE(QUERY_EQ);
483 MLX5_COMMAND_STR_CASE(GEN_EQE);
484 MLX5_COMMAND_STR_CASE(CREATE_CQ);
485 MLX5_COMMAND_STR_CASE(DESTROY_CQ);
486 MLX5_COMMAND_STR_CASE(QUERY_CQ);
487 MLX5_COMMAND_STR_CASE(MODIFY_CQ);
488 MLX5_COMMAND_STR_CASE(CREATE_QP);
489 MLX5_COMMAND_STR_CASE(DESTROY_QP);
490 MLX5_COMMAND_STR_CASE(RST2INIT_QP);
491 MLX5_COMMAND_STR_CASE(INIT2RTR_QP);
492 MLX5_COMMAND_STR_CASE(RTR2RTS_QP);
493 MLX5_COMMAND_STR_CASE(RTS2RTS_QP);
494 MLX5_COMMAND_STR_CASE(SQERR2RTS_QP);
495 MLX5_COMMAND_STR_CASE(2ERR_QP);
496 MLX5_COMMAND_STR_CASE(2RST_QP);
497 MLX5_COMMAND_STR_CASE(QUERY_QP);
498 MLX5_COMMAND_STR_CASE(SQD_RTS_QP);
499 MLX5_COMMAND_STR_CASE(INIT2INIT_QP);
500 MLX5_COMMAND_STR_CASE(CREATE_PSV);
501 MLX5_COMMAND_STR_CASE(DESTROY_PSV);
502 MLX5_COMMAND_STR_CASE(CREATE_SRQ);
503 MLX5_COMMAND_STR_CASE(DESTROY_SRQ);
504 MLX5_COMMAND_STR_CASE(QUERY_SRQ);
505 MLX5_COMMAND_STR_CASE(ARM_RQ);
506 MLX5_COMMAND_STR_CASE(CREATE_XRC_SRQ);
507 MLX5_COMMAND_STR_CASE(DESTROY_XRC_SRQ);
508 MLX5_COMMAND_STR_CASE(QUERY_XRC_SRQ);
509 MLX5_COMMAND_STR_CASE(ARM_XRC_SRQ);
510 MLX5_COMMAND_STR_CASE(CREATE_DCT);
511 MLX5_COMMAND_STR_CASE(DESTROY_DCT);
512 MLX5_COMMAND_STR_CASE(DRAIN_DCT);
513 MLX5_COMMAND_STR_CASE(QUERY_DCT);
514 MLX5_COMMAND_STR_CASE(ARM_DCT_FOR_KEY_VIOLATION);
515 MLX5_COMMAND_STR_CASE(QUERY_VPORT_STATE);
516 MLX5_COMMAND_STR_CASE(MODIFY_VPORT_STATE);
517 MLX5_COMMAND_STR_CASE(QUERY_ESW_VPORT_CONTEXT);
518 MLX5_COMMAND_STR_CASE(MODIFY_ESW_VPORT_CONTEXT);
519 MLX5_COMMAND_STR_CASE(QUERY_NIC_VPORT_CONTEXT);
520 MLX5_COMMAND_STR_CASE(MODIFY_NIC_VPORT_CONTEXT);
521 MLX5_COMMAND_STR_CASE(QUERY_ROCE_ADDRESS);
522 MLX5_COMMAND_STR_CASE(SET_ROCE_ADDRESS);
523 MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_CONTEXT);
524 MLX5_COMMAND_STR_CASE(MODIFY_HCA_VPORT_CONTEXT);
525 MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_GID);
526 MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_PKEY);
527 MLX5_COMMAND_STR_CASE(QUERY_VNIC_ENV);
528 MLX5_COMMAND_STR_CASE(QUERY_VPORT_COUNTER);
529 MLX5_COMMAND_STR_CASE(ALLOC_Q_COUNTER);
530 MLX5_COMMAND_STR_CASE(DEALLOC_Q_COUNTER);
531 MLX5_COMMAND_STR_CASE(QUERY_Q_COUNTER);
532 MLX5_COMMAND_STR_CASE(SET_MONITOR_COUNTER);
533 MLX5_COMMAND_STR_CASE(ARM_MONITOR_COUNTER);
534 MLX5_COMMAND_STR_CASE(SET_PP_RATE_LIMIT);
535 MLX5_COMMAND_STR_CASE(QUERY_RATE_LIMIT);
536 MLX5_COMMAND_STR_CASE(CREATE_SCHEDULING_ELEMENT);
537 MLX5_COMMAND_STR_CASE(DESTROY_SCHEDULING_ELEMENT);
538 MLX5_COMMAND_STR_CASE(QUERY_SCHEDULING_ELEMENT);
539 MLX5_COMMAND_STR_CASE(MODIFY_SCHEDULING_ELEMENT);
540 MLX5_COMMAND_STR_CASE(CREATE_QOS_PARA_VPORT);
541 MLX5_COMMAND_STR_CASE(DESTROY_QOS_PARA_VPORT);
542 MLX5_COMMAND_STR_CASE(ALLOC_PD);
543 MLX5_COMMAND_STR_CASE(DEALLOC_PD);
544 MLX5_COMMAND_STR_CASE(ALLOC_UAR);
545 MLX5_COMMAND_STR_CASE(DEALLOC_UAR);
546 MLX5_COMMAND_STR_CASE(CONFIG_INT_MODERATION);
547 MLX5_COMMAND_STR_CASE(ACCESS_REG);
548 MLX5_COMMAND_STR_CASE(ATTACH_TO_MCG);
549 MLX5_COMMAND_STR_CASE(DETACH_FROM_MCG);
550 MLX5_COMMAND_STR_CASE(GET_DROPPED_PACKET_LOG);
551 MLX5_COMMAND_STR_CASE(MAD_IFC);
552 MLX5_COMMAND_STR_CASE(QUERY_MAD_DEMUX);
553 MLX5_COMMAND_STR_CASE(SET_MAD_DEMUX);
554 MLX5_COMMAND_STR_CASE(NOP);
555 MLX5_COMMAND_STR_CASE(ALLOC_XRCD);
556 MLX5_COMMAND_STR_CASE(DEALLOC_XRCD);
557 MLX5_COMMAND_STR_CASE(ALLOC_TRANSPORT_DOMAIN);
558 MLX5_COMMAND_STR_CASE(DEALLOC_TRANSPORT_DOMAIN);
559 MLX5_COMMAND_STR_CASE(QUERY_CONG_STATUS);
560 MLX5_COMMAND_STR_CASE(MODIFY_CONG_STATUS);
561 MLX5_COMMAND_STR_CASE(QUERY_CONG_PARAMS);
562 MLX5_COMMAND_STR_CASE(MODIFY_CONG_PARAMS);
563 MLX5_COMMAND_STR_CASE(QUERY_CONG_STATISTICS);
564 MLX5_COMMAND_STR_CASE(ADD_VXLAN_UDP_DPORT);
565 MLX5_COMMAND_STR_CASE(DELETE_VXLAN_UDP_DPORT);
566 MLX5_COMMAND_STR_CASE(SET_L2_TABLE_ENTRY);
567 MLX5_COMMAND_STR_CASE(QUERY_L2_TABLE_ENTRY);
568 MLX5_COMMAND_STR_CASE(DELETE_L2_TABLE_ENTRY);
569 MLX5_COMMAND_STR_CASE(SET_WOL_ROL);
570 MLX5_COMMAND_STR_CASE(QUERY_WOL_ROL);
571 MLX5_COMMAND_STR_CASE(CREATE_LAG);
572 MLX5_COMMAND_STR_CASE(MODIFY_LAG);
573 MLX5_COMMAND_STR_CASE(QUERY_LAG);
574 MLX5_COMMAND_STR_CASE(DESTROY_LAG);
575 MLX5_COMMAND_STR_CASE(CREATE_VPORT_LAG);
576 MLX5_COMMAND_STR_CASE(DESTROY_VPORT_LAG);
577 MLX5_COMMAND_STR_CASE(CREATE_TIR);
578 MLX5_COMMAND_STR_CASE(MODIFY_TIR);
579 MLX5_COMMAND_STR_CASE(DESTROY_TIR);
580 MLX5_COMMAND_STR_CASE(QUERY_TIR);
581 MLX5_COMMAND_STR_CASE(CREATE_SQ);
582 MLX5_COMMAND_STR_CASE(MODIFY_SQ);
583 MLX5_COMMAND_STR_CASE(DESTROY_SQ);
584 MLX5_COMMAND_STR_CASE(QUERY_SQ);
585 MLX5_COMMAND_STR_CASE(CREATE_RQ);
586 MLX5_COMMAND_STR_CASE(MODIFY_RQ);
587 MLX5_COMMAND_STR_CASE(DESTROY_RQ);
588 MLX5_COMMAND_STR_CASE(QUERY_RQ);
589 MLX5_COMMAND_STR_CASE(CREATE_RMP);
590 MLX5_COMMAND_STR_CASE(MODIFY_RMP);
591 MLX5_COMMAND_STR_CASE(DESTROY_RMP);
592 MLX5_COMMAND_STR_CASE(QUERY_RMP);
593 MLX5_COMMAND_STR_CASE(CREATE_TIS);
594 MLX5_COMMAND_STR_CASE(MODIFY_TIS);
595 MLX5_COMMAND_STR_CASE(DESTROY_TIS);
596 MLX5_COMMAND_STR_CASE(QUERY_TIS);
597 MLX5_COMMAND_STR_CASE(CREATE_RQT);
598 MLX5_COMMAND_STR_CASE(MODIFY_RQT);
599 MLX5_COMMAND_STR_CASE(DESTROY_RQT);
600 MLX5_COMMAND_STR_CASE(QUERY_RQT);
601 MLX5_COMMAND_STR_CASE(SET_FLOW_TABLE_ROOT);
602 MLX5_COMMAND_STR_CASE(CREATE_FLOW_TABLE);
603 MLX5_COMMAND_STR_CASE(DESTROY_FLOW_TABLE);
604 MLX5_COMMAND_STR_CASE(QUERY_FLOW_TABLE);
605 MLX5_COMMAND_STR_CASE(CREATE_FLOW_GROUP);
606 MLX5_COMMAND_STR_CASE(DESTROY_FLOW_GROUP);
607 MLX5_COMMAND_STR_CASE(QUERY_FLOW_GROUP);
608 MLX5_COMMAND_STR_CASE(SET_FLOW_TABLE_ENTRY);
609 MLX5_COMMAND_STR_CASE(QUERY_FLOW_TABLE_ENTRY);
610 MLX5_COMMAND_STR_CASE(DELETE_FLOW_TABLE_ENTRY);
611 MLX5_COMMAND_STR_CASE(ALLOC_FLOW_COUNTER);
612 MLX5_COMMAND_STR_CASE(DEALLOC_FLOW_COUNTER);
613 MLX5_COMMAND_STR_CASE(QUERY_FLOW_COUNTER);
614 MLX5_COMMAND_STR_CASE(MODIFY_FLOW_TABLE);
615 MLX5_COMMAND_STR_CASE(ALLOC_PACKET_REFORMAT_CONTEXT);
616 MLX5_COMMAND_STR_CASE(DEALLOC_PACKET_REFORMAT_CONTEXT);
617 MLX5_COMMAND_STR_CASE(ALLOC_MODIFY_HEADER_CONTEXT);
618 MLX5_COMMAND_STR_CASE(DEALLOC_MODIFY_HEADER_CONTEXT);
619 MLX5_COMMAND_STR_CASE(FPGA_CREATE_QP);
620 MLX5_COMMAND_STR_CASE(FPGA_MODIFY_QP);
621 MLX5_COMMAND_STR_CASE(FPGA_QUERY_QP);
622 MLX5_COMMAND_STR_CASE(FPGA_QUERY_QP_COUNTERS);
623 MLX5_COMMAND_STR_CASE(FPGA_DESTROY_QP);
624 MLX5_COMMAND_STR_CASE(CREATE_XRQ);
625 MLX5_COMMAND_STR_CASE(DESTROY_XRQ);
626 MLX5_COMMAND_STR_CASE(QUERY_XRQ);
627 MLX5_COMMAND_STR_CASE(ARM_XRQ);
628 MLX5_COMMAND_STR_CASE(CREATE_GENERAL_OBJECT);
629 MLX5_COMMAND_STR_CASE(DESTROY_GENERAL_OBJECT);
630 MLX5_COMMAND_STR_CASE(MODIFY_GENERAL_OBJECT);
631 MLX5_COMMAND_STR_CASE(QUERY_GENERAL_OBJECT);
632 MLX5_COMMAND_STR_CASE(QUERY_MODIFY_HEADER_CONTEXT);
633 MLX5_COMMAND_STR_CASE(ALLOC_MEMIC);
634 MLX5_COMMAND_STR_CASE(DEALLOC_MEMIC);
635 MLX5_COMMAND_STR_CASE(QUERY_HOST_PARAMS);
636 MLX5_COMMAND_STR_CASE(CREATE_UCTX);
637 MLX5_COMMAND_STR_CASE(DESTROY_UCTX);
638 MLX5_COMMAND_STR_CASE(CREATE_UMEM);
639 MLX5_COMMAND_STR_CASE(DESTROY_UMEM);
640 default: return "unknown command opcode";
641 }
642}
643
644static const char *cmd_status_str(u8 status)
645{
646 switch (status) {
647 case MLX5_CMD_STAT_OK:
648 return "OK";
649 case MLX5_CMD_STAT_INT_ERR:
650 return "internal error";
651 case MLX5_CMD_STAT_BAD_OP_ERR:
652 return "bad operation";
653 case MLX5_CMD_STAT_BAD_PARAM_ERR:
654 return "bad parameter";
655 case MLX5_CMD_STAT_BAD_SYS_STATE_ERR:
656 return "bad system state";
657 case MLX5_CMD_STAT_BAD_RES_ERR:
658 return "bad resource";
659 case MLX5_CMD_STAT_RES_BUSY:
660 return "resource busy";
661 case MLX5_CMD_STAT_LIM_ERR:
662 return "limits exceeded";
663 case MLX5_CMD_STAT_BAD_RES_STATE_ERR:
664 return "bad resource state";
665 case MLX5_CMD_STAT_IX_ERR:
666 return "bad index";
667 case MLX5_CMD_STAT_NO_RES_ERR:
668 return "no resources";
669 case MLX5_CMD_STAT_BAD_INP_LEN_ERR:
670 return "bad input length";
671 case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR:
672 return "bad output length";
673 case MLX5_CMD_STAT_BAD_QP_STATE_ERR:
674 return "bad QP state";
675 case MLX5_CMD_STAT_BAD_PKT_ERR:
676 return "bad packet (discarded)";
677 case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR:
678 return "bad size too many outstanding CQEs";
679 default:
680 return "unknown status";
681 }
682}
683
684static int cmd_status_to_err(u8 status)
685{
686 switch (status) {
687 case MLX5_CMD_STAT_OK: return 0;
688 case MLX5_CMD_STAT_INT_ERR: return -EIO;
689 case MLX5_CMD_STAT_BAD_OP_ERR: return -EINVAL;
690 case MLX5_CMD_STAT_BAD_PARAM_ERR: return -EINVAL;
691 case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: return -EIO;
692 case MLX5_CMD_STAT_BAD_RES_ERR: return -EINVAL;
693 case MLX5_CMD_STAT_RES_BUSY: return -EBUSY;
694 case MLX5_CMD_STAT_LIM_ERR: return -ENOMEM;
695 case MLX5_CMD_STAT_BAD_RES_STATE_ERR: return -EINVAL;
696 case MLX5_CMD_STAT_IX_ERR: return -EINVAL;
697 case MLX5_CMD_STAT_NO_RES_ERR: return -EAGAIN;
698 case MLX5_CMD_STAT_BAD_INP_LEN_ERR: return -EIO;
699 case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: return -EIO;
700 case MLX5_CMD_STAT_BAD_QP_STATE_ERR: return -EINVAL;
701 case MLX5_CMD_STAT_BAD_PKT_ERR: return -EINVAL;
702 case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: return -EINVAL;
703 default: return -EIO;
704 }
705}
706
707struct mlx5_ifc_mbox_out_bits {
708 u8 status[0x8];
709 u8 reserved_at_8[0x18];
710
711 u8 syndrome[0x20];
712
713 u8 reserved_at_40[0x40];
714};
715
716struct mlx5_ifc_mbox_in_bits {
717 u8 opcode[0x10];
718 u8 uid[0x10];
719
720 u8 reserved_at_20[0x10];
721 u8 op_mod[0x10];
722
723 u8 reserved_at_40[0x40];
724};
725
726void mlx5_cmd_mbox_status(void *out, u8 *status, u32 *syndrome)
727{
728 *status = MLX5_GET(mbox_out, out, status);
729 *syndrome = MLX5_GET(mbox_out, out, syndrome);
730}
731
732static int mlx5_cmd_check(struct mlx5_core_dev *dev, void *in, void *out)
733{
734 u32 syndrome;
735 u8 status;
736 u16 opcode;
737 u16 op_mod;
738 u16 uid;
739
740 mlx5_cmd_mbox_status(out, &status, &syndrome);
741 if (!status)
742 return 0;
743
744 opcode = MLX5_GET(mbox_in, in, opcode);
745 op_mod = MLX5_GET(mbox_in, in, op_mod);
746 uid = MLX5_GET(mbox_in, in, uid);
747
748 if (!uid && opcode != MLX5_CMD_OP_DESTROY_MKEY)
749 mlx5_core_err_rl(dev,
750 "%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x)\n",
751 mlx5_command_str(opcode), opcode, op_mod,
752 cmd_status_str(status), status, syndrome);
753 else
754 mlx5_core_dbg(dev,
755 "%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x)\n",
756 mlx5_command_str(opcode),
757 opcode, op_mod,
758 cmd_status_str(status),
759 status,
760 syndrome);
761
762 return cmd_status_to_err(status);
763}
764
765static void dump_command(struct mlx5_core_dev *dev,
766 struct mlx5_cmd_work_ent *ent, int input)
767{
768 struct mlx5_cmd_msg *msg = input ? ent->in : ent->out;
769 u16 op = MLX5_GET(mbox_in, ent->lay->in, opcode);
770 struct mlx5_cmd_mailbox *next = msg->next;
771 int n = mlx5_calc_cmd_blocks(msg);
772 int data_only;
773 u32 offset = 0;
774 int dump_len;
775 int i;
776
777 data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA));
778
779 if (data_only)
780 mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA,
781 "dump command data %s(0x%x) %s\n",
782 mlx5_command_str(op), op,
783 input ? "INPUT" : "OUTPUT");
784 else
785 mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n",
786 mlx5_command_str(op), op,
787 input ? "INPUT" : "OUTPUT");
788
789 if (data_only) {
790 if (input) {
791 dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset);
792 offset += sizeof(ent->lay->in);
793 } else {
794 dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset);
795 offset += sizeof(ent->lay->out);
796 }
797 } else {
798 dump_buf(ent->lay, sizeof(*ent->lay), 0, offset);
799 offset += sizeof(*ent->lay);
800 }
801
802 for (i = 0; i < n && next; i++) {
803 if (data_only) {
804 dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset);
805 dump_buf(next->buf, dump_len, 1, offset);
806 offset += MLX5_CMD_DATA_BLOCK_SIZE;
807 } else {
808 mlx5_core_dbg(dev, "command block:\n");
809 dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset);
810 offset += sizeof(struct mlx5_cmd_prot_block);
811 }
812 next = next->next;
813 }
814
815 if (data_only)
816 pr_debug("\n");
817}
818
819static u16 msg_to_opcode(struct mlx5_cmd_msg *in)
820{
821 return MLX5_GET(mbox_in, in->first.data, opcode);
822}
823
824static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool forced);
825
826static void cb_timeout_handler(struct work_struct *work)
827{
828 struct delayed_work *dwork = container_of(work, struct delayed_work,
829 work);
830 struct mlx5_cmd_work_ent *ent = container_of(dwork,
831 struct mlx5_cmd_work_ent,
832 cb_timeout_work);
833 struct mlx5_core_dev *dev = container_of(ent->cmd, struct mlx5_core_dev,
834 cmd);
835
836 ent->ret = -ETIMEDOUT;
837 mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n",
838 mlx5_command_str(msg_to_opcode(ent->in)),
839 msg_to_opcode(ent->in));
840 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, true);
841}
842
843static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg);
844static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev,
845 struct mlx5_cmd_msg *msg);
846
847static void cmd_work_handler(struct work_struct *work)
848{
849 struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work);
850 struct mlx5_cmd *cmd = ent->cmd;
851 struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev, cmd);
852 unsigned long cb_timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC);
853 struct mlx5_cmd_layout *lay;
854 struct semaphore *sem;
855 unsigned long flags;
856 bool poll_cmd = ent->polling;
857 int alloc_ret;
858 int cmd_mode;
859
860 sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem;
861 down(sem);
862 if (!ent->page_queue) {
863 alloc_ret = alloc_ent(cmd);
864 if (alloc_ret < 0) {
865 mlx5_core_err(dev, "failed to allocate command entry\n");
866 if (ent->callback) {
867 ent->callback(-EAGAIN, ent->context);
868 mlx5_free_cmd_msg(dev, ent->out);
869 free_msg(dev, ent->in);
870 free_cmd(ent);
871 } else {
872 ent->ret = -EAGAIN;
873 complete(&ent->done);
874 }
875 up(sem);
876 return;
877 }
878 ent->idx = alloc_ret;
879 } else {
880 ent->idx = cmd->max_reg_cmds;
881 spin_lock_irqsave(&cmd->alloc_lock, flags);
882 clear_bit(ent->idx, &cmd->bitmask);
883 spin_unlock_irqrestore(&cmd->alloc_lock, flags);
884 }
885
886 cmd->ent_arr[ent->idx] = ent;
887 set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state);
888 lay = get_inst(cmd, ent->idx);
889 ent->lay = lay;
890 memset(lay, 0, sizeof(*lay));
891 memcpy(lay->in, ent->in->first.data, sizeof(lay->in));
892 ent->op = be32_to_cpu(lay->in[0]) >> 16;
893 if (ent->in->next)
894 lay->in_ptr = cpu_to_be64(ent->in->next->dma);
895 lay->inlen = cpu_to_be32(ent->in->len);
896 if (ent->out->next)
897 lay->out_ptr = cpu_to_be64(ent->out->next->dma);
898 lay->outlen = cpu_to_be32(ent->out->len);
899 lay->type = MLX5_PCI_CMD_XPORT;
900 lay->token = ent->token;
901 lay->status_own = CMD_OWNER_HW;
902 set_signature(ent, !cmd->checksum_disabled);
903 dump_command(dev, ent, 1);
904 ent->ts1 = ktime_get_ns();
905 cmd_mode = cmd->mode;
906
907 if (ent->callback)
908 schedule_delayed_work(&ent->cb_timeout_work, cb_timeout);
909
910
911 if (pci_channel_offline(dev->pdev) ||
912 dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {
913 u8 status = 0;
914 u32 drv_synd;
915
916 ent->ret = mlx5_internal_err_ret_value(dev, msg_to_opcode(ent->in), &drv_synd, &status);
917 MLX5_SET(mbox_out, ent->out, status, status);
918 MLX5_SET(mbox_out, ent->out, syndrome, drv_synd);
919
920 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, true);
921 return;
922 }
923
924
925 mlx5_core_dbg(dev, "writing 0x%x to command doorbell\n", 1 << ent->idx);
926 wmb();
927 iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell);
928
929 if (cmd_mode == CMD_MODE_POLLING || poll_cmd) {
930 poll_timeout(ent);
931
932 rmb();
933 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, (ent->ret == -ETIMEDOUT));
934 }
935}
936
937static const char *deliv_status_to_str(u8 status)
938{
939 switch (status) {
940 case MLX5_CMD_DELIVERY_STAT_OK:
941 return "no errors";
942 case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR:
943 return "signature error";
944 case MLX5_CMD_DELIVERY_STAT_TOK_ERR:
945 return "token error";
946 case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR:
947 return "bad block number";
948 case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR:
949 return "output pointer not aligned to block size";
950 case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR:
951 return "input pointer not aligned to block size";
952 case MLX5_CMD_DELIVERY_STAT_FW_ERR:
953 return "firmware internal error";
954 case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR:
955 return "command input length error";
956 case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR:
957 return "command output length error";
958 case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR:
959 return "reserved fields not cleared";
960 case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR:
961 return "bad command descriptor type";
962 default:
963 return "unknown status code";
964 }
965}
966
967static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent)
968{
969 unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC);
970 struct mlx5_cmd *cmd = &dev->cmd;
971 int err;
972
973 if (cmd->mode == CMD_MODE_POLLING || ent->polling) {
974 wait_for_completion(&ent->done);
975 } else if (!wait_for_completion_timeout(&ent->done, timeout)) {
976 ent->ret = -ETIMEDOUT;
977 mlx5_cmd_comp_handler(dev, 1UL << ent->idx, true);
978 }
979
980 err = ent->ret;
981
982 if (err == -ETIMEDOUT) {
983 mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n",
984 mlx5_command_str(msg_to_opcode(ent->in)),
985 msg_to_opcode(ent->in));
986 }
987 mlx5_core_dbg(dev, "err %d, delivery status %s(%d)\n",
988 err, deliv_status_to_str(ent->status), ent->status);
989
990 return err;
991}
992
993
994
995
996
997static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in,
998 struct mlx5_cmd_msg *out, void *uout, int uout_size,
999 mlx5_cmd_cbk_t callback,
1000 void *context, int page_queue, u8 *status,
1001 u8 token, bool force_polling)
1002{
1003 struct mlx5_cmd *cmd = &dev->cmd;
1004 struct mlx5_cmd_work_ent *ent;
1005 struct mlx5_cmd_stats *stats;
1006 int err = 0;
1007 s64 ds;
1008 u16 op;
1009
1010 if (callback && page_queue)
1011 return -EINVAL;
1012
1013 ent = alloc_cmd(cmd, in, out, uout, uout_size, callback, context,
1014 page_queue);
1015 if (IS_ERR(ent))
1016 return PTR_ERR(ent);
1017
1018 ent->token = token;
1019 ent->polling = force_polling;
1020
1021 if (!callback)
1022 init_completion(&ent->done);
1023
1024 INIT_DELAYED_WORK(&ent->cb_timeout_work, cb_timeout_handler);
1025 INIT_WORK(&ent->work, cmd_work_handler);
1026 if (page_queue) {
1027 cmd_work_handler(&ent->work);
1028 } else if (!queue_work(cmd->wq, &ent->work)) {
1029 mlx5_core_warn(dev, "failed to queue work\n");
1030 err = -ENOMEM;
1031 goto out_free;
1032 }
1033
1034 if (callback)
1035 goto out;
1036
1037 err = wait_func(dev, ent);
1038 if (err == -ETIMEDOUT)
1039 goto out;
1040
1041 ds = ent->ts2 - ent->ts1;
1042 op = MLX5_GET(mbox_in, in->first.data, opcode);
1043 if (op < ARRAY_SIZE(cmd->stats)) {
1044 stats = &cmd->stats[op];
1045 spin_lock_irq(&stats->lock);
1046 stats->sum += ds;
1047 ++stats->n;
1048 spin_unlock_irq(&stats->lock);
1049 }
1050 mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME,
1051 "fw exec time for %s is %lld nsec\n",
1052 mlx5_command_str(op), ds);
1053 *status = ent->status;
1054
1055out_free:
1056 free_cmd(ent);
1057out:
1058 return err;
1059}
1060
1061static ssize_t dbg_write(struct file *filp, const char __user *buf,
1062 size_t count, loff_t *pos)
1063{
1064 struct mlx5_core_dev *dev = filp->private_data;
1065 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1066 char lbuf[3];
1067 int err;
1068
1069 if (!dbg->in_msg || !dbg->out_msg)
1070 return -ENOMEM;
1071
1072 if (count < sizeof(lbuf) - 1)
1073 return -EINVAL;
1074
1075 if (copy_from_user(lbuf, buf, sizeof(lbuf) - 1))
1076 return -EFAULT;
1077
1078 lbuf[sizeof(lbuf) - 1] = 0;
1079
1080 if (strcmp(lbuf, "go"))
1081 return -EINVAL;
1082
1083 err = mlx5_cmd_exec(dev, dbg->in_msg, dbg->inlen, dbg->out_msg, dbg->outlen);
1084
1085 return err ? err : count;
1086}
1087
1088static const struct file_operations fops = {
1089 .owner = THIS_MODULE,
1090 .open = simple_open,
1091 .write = dbg_write,
1092};
1093
1094static int mlx5_copy_to_msg(struct mlx5_cmd_msg *to, void *from, int size,
1095 u8 token)
1096{
1097 struct mlx5_cmd_prot_block *block;
1098 struct mlx5_cmd_mailbox *next;
1099 int copy;
1100
1101 if (!to || !from)
1102 return -ENOMEM;
1103
1104 copy = min_t(int, size, sizeof(to->first.data));
1105 memcpy(to->first.data, from, copy);
1106 size -= copy;
1107 from += copy;
1108
1109 next = to->next;
1110 while (size) {
1111 if (!next) {
1112
1113 return -ENOMEM;
1114 }
1115
1116 copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE);
1117 block = next->buf;
1118 memcpy(block->data, from, copy);
1119 from += copy;
1120 size -= copy;
1121 block->token = token;
1122 next = next->next;
1123 }
1124
1125 return 0;
1126}
1127
1128static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size)
1129{
1130 struct mlx5_cmd_prot_block *block;
1131 struct mlx5_cmd_mailbox *next;
1132 int copy;
1133
1134 if (!to || !from)
1135 return -ENOMEM;
1136
1137 copy = min_t(int, size, sizeof(from->first.data));
1138 memcpy(to, from->first.data, copy);
1139 size -= copy;
1140 to += copy;
1141
1142 next = from->next;
1143 while (size) {
1144 if (!next) {
1145
1146 return -ENOMEM;
1147 }
1148
1149 copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE);
1150 block = next->buf;
1151
1152 memcpy(to, block->data, copy);
1153 to += copy;
1154 size -= copy;
1155 next = next->next;
1156 }
1157
1158 return 0;
1159}
1160
1161static struct mlx5_cmd_mailbox *alloc_cmd_box(struct mlx5_core_dev *dev,
1162 gfp_t flags)
1163{
1164 struct mlx5_cmd_mailbox *mailbox;
1165
1166 mailbox = kmalloc(sizeof(*mailbox), flags);
1167 if (!mailbox)
1168 return ERR_PTR(-ENOMEM);
1169
1170 mailbox->buf = dma_pool_zalloc(dev->cmd.pool, flags,
1171 &mailbox->dma);
1172 if (!mailbox->buf) {
1173 mlx5_core_dbg(dev, "failed allocation\n");
1174 kfree(mailbox);
1175 return ERR_PTR(-ENOMEM);
1176 }
1177 mailbox->next = NULL;
1178
1179 return mailbox;
1180}
1181
1182static void free_cmd_box(struct mlx5_core_dev *dev,
1183 struct mlx5_cmd_mailbox *mailbox)
1184{
1185 dma_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma);
1186 kfree(mailbox);
1187}
1188
1189static struct mlx5_cmd_msg *mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev,
1190 gfp_t flags, int size,
1191 u8 token)
1192{
1193 struct mlx5_cmd_mailbox *tmp, *head = NULL;
1194 struct mlx5_cmd_prot_block *block;
1195 struct mlx5_cmd_msg *msg;
1196 int err;
1197 int n;
1198 int i;
1199
1200 msg = kzalloc(sizeof(*msg), flags);
1201 if (!msg)
1202 return ERR_PTR(-ENOMEM);
1203
1204 msg->len = size;
1205 n = mlx5_calc_cmd_blocks(msg);
1206
1207 for (i = 0; i < n; i++) {
1208 tmp = alloc_cmd_box(dev, flags);
1209 if (IS_ERR(tmp)) {
1210 mlx5_core_warn(dev, "failed allocating block\n");
1211 err = PTR_ERR(tmp);
1212 goto err_alloc;
1213 }
1214
1215 block = tmp->buf;
1216 tmp->next = head;
1217 block->next = cpu_to_be64(tmp->next ? tmp->next->dma : 0);
1218 block->block_num = cpu_to_be32(n - i - 1);
1219 block->token = token;
1220 head = tmp;
1221 }
1222 msg->next = head;
1223 return msg;
1224
1225err_alloc:
1226 while (head) {
1227 tmp = head->next;
1228 free_cmd_box(dev, head);
1229 head = tmp;
1230 }
1231 kfree(msg);
1232
1233 return ERR_PTR(err);
1234}
1235
1236static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev,
1237 struct mlx5_cmd_msg *msg)
1238{
1239 struct mlx5_cmd_mailbox *head = msg->next;
1240 struct mlx5_cmd_mailbox *next;
1241
1242 while (head) {
1243 next = head->next;
1244 free_cmd_box(dev, head);
1245 head = next;
1246 }
1247 kfree(msg);
1248}
1249
1250static ssize_t data_write(struct file *filp, const char __user *buf,
1251 size_t count, loff_t *pos)
1252{
1253 struct mlx5_core_dev *dev = filp->private_data;
1254 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1255 void *ptr;
1256
1257 if (*pos != 0)
1258 return -EINVAL;
1259
1260 kfree(dbg->in_msg);
1261 dbg->in_msg = NULL;
1262 dbg->inlen = 0;
1263 ptr = memdup_user(buf, count);
1264 if (IS_ERR(ptr))
1265 return PTR_ERR(ptr);
1266 dbg->in_msg = ptr;
1267 dbg->inlen = count;
1268
1269 *pos = count;
1270
1271 return count;
1272}
1273
1274static ssize_t data_read(struct file *filp, char __user *buf, size_t count,
1275 loff_t *pos)
1276{
1277 struct mlx5_core_dev *dev = filp->private_data;
1278 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1279
1280 if (!dbg->out_msg)
1281 return -ENOMEM;
1282
1283 return simple_read_from_buffer(buf, count, pos, dbg->out_msg,
1284 dbg->outlen);
1285}
1286
1287static const struct file_operations dfops = {
1288 .owner = THIS_MODULE,
1289 .open = simple_open,
1290 .write = data_write,
1291 .read = data_read,
1292};
1293
1294static ssize_t outlen_read(struct file *filp, char __user *buf, size_t count,
1295 loff_t *pos)
1296{
1297 struct mlx5_core_dev *dev = filp->private_data;
1298 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1299 char outlen[8];
1300 int err;
1301
1302 err = snprintf(outlen, sizeof(outlen), "%d", dbg->outlen);
1303 if (err < 0)
1304 return err;
1305
1306 return simple_read_from_buffer(buf, count, pos, outlen, err);
1307}
1308
1309static ssize_t outlen_write(struct file *filp, const char __user *buf,
1310 size_t count, loff_t *pos)
1311{
1312 struct mlx5_core_dev *dev = filp->private_data;
1313 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1314 char outlen_str[8] = {0};
1315 int outlen;
1316 void *ptr;
1317 int err;
1318
1319 if (*pos != 0 || count > 6)
1320 return -EINVAL;
1321
1322 kfree(dbg->out_msg);
1323 dbg->out_msg = NULL;
1324 dbg->outlen = 0;
1325
1326 if (copy_from_user(outlen_str, buf, count))
1327 return -EFAULT;
1328
1329 err = sscanf(outlen_str, "%d", &outlen);
1330 if (err < 0)
1331 return err;
1332
1333 ptr = kzalloc(outlen, GFP_KERNEL);
1334 if (!ptr)
1335 return -ENOMEM;
1336
1337 dbg->out_msg = ptr;
1338 dbg->outlen = outlen;
1339
1340 *pos = count;
1341
1342 return count;
1343}
1344
1345static const struct file_operations olfops = {
1346 .owner = THIS_MODULE,
1347 .open = simple_open,
1348 .write = outlen_write,
1349 .read = outlen_read,
1350};
1351
1352static void set_wqname(struct mlx5_core_dev *dev)
1353{
1354 struct mlx5_cmd *cmd = &dev->cmd;
1355
1356 snprintf(cmd->wq_name, sizeof(cmd->wq_name), "mlx5_cmd_%s",
1357 dev_name(dev->device));
1358}
1359
1360static void clean_debug_files(struct mlx5_core_dev *dev)
1361{
1362 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1363
1364 if (!mlx5_debugfs_root)
1365 return;
1366
1367 mlx5_cmdif_debugfs_cleanup(dev);
1368 debugfs_remove_recursive(dbg->dbg_root);
1369}
1370
1371static int create_debugfs_files(struct mlx5_core_dev *dev)
1372{
1373 struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
1374 int err = -ENOMEM;
1375
1376 if (!mlx5_debugfs_root)
1377 return 0;
1378
1379 dbg->dbg_root = debugfs_create_dir("cmd", dev->priv.dbg_root);
1380 if (!dbg->dbg_root)
1381 return err;
1382
1383 dbg->dbg_in = debugfs_create_file("in", 0400, dbg->dbg_root,
1384 dev, &dfops);
1385 if (!dbg->dbg_in)
1386 goto err_dbg;
1387
1388 dbg->dbg_out = debugfs_create_file("out", 0200, dbg->dbg_root,
1389 dev, &dfops);
1390 if (!dbg->dbg_out)
1391 goto err_dbg;
1392
1393 dbg->dbg_outlen = debugfs_create_file("out_len", 0600, dbg->dbg_root,
1394 dev, &olfops);
1395 if (!dbg->dbg_outlen)
1396 goto err_dbg;
1397
1398 dbg->dbg_status = debugfs_create_u8("status", 0600, dbg->dbg_root,
1399 &dbg->status);
1400 if (!dbg->dbg_status)
1401 goto err_dbg;
1402
1403 dbg->dbg_run = debugfs_create_file("run", 0200, dbg->dbg_root, dev, &fops);
1404 if (!dbg->dbg_run)
1405 goto err_dbg;
1406
1407 mlx5_cmdif_debugfs_init(dev);
1408
1409 return 0;
1410
1411err_dbg:
1412 clean_debug_files(dev);
1413 return err;
1414}
1415
1416static void mlx5_cmd_change_mod(struct mlx5_core_dev *dev, int mode)
1417{
1418 struct mlx5_cmd *cmd = &dev->cmd;
1419 int i;
1420
1421 for (i = 0; i < cmd->max_reg_cmds; i++)
1422 down(&cmd->sem);
1423 down(&cmd->pages_sem);
1424
1425 cmd->mode = mode;
1426
1427 up(&cmd->pages_sem);
1428 for (i = 0; i < cmd->max_reg_cmds; i++)
1429 up(&cmd->sem);
1430}
1431
1432static int cmd_comp_notifier(struct notifier_block *nb,
1433 unsigned long type, void *data)
1434{
1435 struct mlx5_core_dev *dev;
1436 struct mlx5_cmd *cmd;
1437 struct mlx5_eqe *eqe;
1438
1439 cmd = mlx5_nb_cof(nb, struct mlx5_cmd, nb);
1440 dev = container_of(cmd, struct mlx5_core_dev, cmd);
1441 eqe = data;
1442
1443 mlx5_cmd_comp_handler(dev, be32_to_cpu(eqe->data.cmd.vector), false);
1444
1445 return NOTIFY_OK;
1446}
1447void mlx5_cmd_use_events(struct mlx5_core_dev *dev)
1448{
1449 MLX5_NB_INIT(&dev->cmd.nb, cmd_comp_notifier, CMD);
1450 mlx5_eq_notifier_register(dev, &dev->cmd.nb);
1451 mlx5_cmd_change_mod(dev, CMD_MODE_EVENTS);
1452}
1453
1454void mlx5_cmd_use_polling(struct mlx5_core_dev *dev)
1455{
1456 mlx5_cmd_change_mod(dev, CMD_MODE_POLLING);
1457 mlx5_eq_notifier_unregister(dev, &dev->cmd.nb);
1458}
1459
1460static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg)
1461{
1462 unsigned long flags;
1463
1464 if (msg->parent) {
1465 spin_lock_irqsave(&msg->parent->lock, flags);
1466 list_add_tail(&msg->list, &msg->parent->head);
1467 spin_unlock_irqrestore(&msg->parent->lock, flags);
1468 } else {
1469 mlx5_free_cmd_msg(dev, msg);
1470 }
1471}
1472
1473static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool forced)
1474{
1475 struct mlx5_cmd *cmd = &dev->cmd;
1476 struct mlx5_cmd_work_ent *ent;
1477 mlx5_cmd_cbk_t callback;
1478 void *context;
1479 int err;
1480 int i;
1481 s64 ds;
1482 struct mlx5_cmd_stats *stats;
1483 unsigned long flags;
1484 unsigned long vector;
1485
1486
1487 vector = vec & 0xffffffff;
1488 for (i = 0; i < (1 << cmd->log_sz); i++) {
1489 if (test_bit(i, &vector)) {
1490 struct semaphore *sem;
1491
1492 ent = cmd->ent_arr[i];
1493
1494
1495 if (!test_and_clear_bit(MLX5_CMD_ENT_STATE_PENDING_COMP,
1496 &ent->state)) {
1497
1498 if (!forced) {
1499 mlx5_core_err(dev, "Command completion arrived after timeout (entry idx = %d).\n",
1500 ent->idx);
1501 free_ent(cmd, ent->idx);
1502 free_cmd(ent);
1503 }
1504 continue;
1505 }
1506
1507 if (ent->callback)
1508 cancel_delayed_work(&ent->cb_timeout_work);
1509 if (ent->page_queue)
1510 sem = &cmd->pages_sem;
1511 else
1512 sem = &cmd->sem;
1513 ent->ts2 = ktime_get_ns();
1514 memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out));
1515 dump_command(dev, ent, 0);
1516 if (!ent->ret) {
1517 if (!cmd->checksum_disabled)
1518 ent->ret = verify_signature(ent);
1519 else
1520 ent->ret = 0;
1521 if (vec & MLX5_TRIGGERED_CMD_COMP)
1522 ent->status = MLX5_DRIVER_STATUS_ABORTED;
1523 else
1524 ent->status = ent->lay->status_own >> 1;
1525
1526 mlx5_core_dbg(dev, "command completed. ret 0x%x, delivery status %s(0x%x)\n",
1527 ent->ret, deliv_status_to_str(ent->status), ent->status);
1528 }
1529
1530
1531 if (!forced)
1532 free_ent(cmd, ent->idx);
1533
1534 if (ent->callback) {
1535 ds = ent->ts2 - ent->ts1;
1536 if (ent->op < ARRAY_SIZE(cmd->stats)) {
1537 stats = &cmd->stats[ent->op];
1538 spin_lock_irqsave(&stats->lock, flags);
1539 stats->sum += ds;
1540 ++stats->n;
1541 spin_unlock_irqrestore(&stats->lock, flags);
1542 }
1543
1544 callback = ent->callback;
1545 context = ent->context;
1546 err = ent->ret;
1547 if (!err) {
1548 err = mlx5_copy_from_msg(ent->uout,
1549 ent->out,
1550 ent->uout_size);
1551
1552 err = err ? err : mlx5_cmd_check(dev,
1553 ent->in->first.data,
1554 ent->uout);
1555 }
1556
1557 mlx5_free_cmd_msg(dev, ent->out);
1558 free_msg(dev, ent->in);
1559
1560 err = err ? err : ent->status;
1561 if (!forced)
1562 free_cmd(ent);
1563 callback(err, context);
1564 } else {
1565 complete(&ent->done);
1566 }
1567 up(sem);
1568 }
1569 }
1570}
1571
1572void mlx5_cmd_trigger_completions(struct mlx5_core_dev *dev)
1573{
1574 unsigned long flags;
1575 u64 vector;
1576
1577
1578 mlx5_eq_synchronize_cmd_irq(dev);
1579 spin_lock_irqsave(&dev->cmd.alloc_lock, flags);
1580 vector = ~dev->cmd.bitmask & ((1ul << (1 << dev->cmd.log_sz)) - 1);
1581 if (!vector)
1582 goto no_trig;
1583
1584 vector |= MLX5_TRIGGERED_CMD_COMP;
1585 spin_unlock_irqrestore(&dev->cmd.alloc_lock, flags);
1586
1587 mlx5_core_dbg(dev, "vector 0x%llx\n", vector);
1588 mlx5_cmd_comp_handler(dev, vector, true);
1589 return;
1590
1591no_trig:
1592 spin_unlock_irqrestore(&dev->cmd.alloc_lock, flags);
1593}
1594
1595void mlx5_cmd_flush(struct mlx5_core_dev *dev)
1596{
1597 struct mlx5_cmd *cmd = &dev->cmd;
1598 int i;
1599
1600 for (i = 0; i < cmd->max_reg_cmds; i++)
1601 while (down_trylock(&cmd->sem))
1602 mlx5_cmd_trigger_completions(dev);
1603
1604 while (down_trylock(&cmd->pages_sem))
1605 mlx5_cmd_trigger_completions(dev);
1606
1607
1608 up(&cmd->pages_sem);
1609 for (i = 0; i < cmd->max_reg_cmds; i++)
1610 up(&cmd->sem);
1611}
1612
1613static int status_to_err(u8 status)
1614{
1615 switch (status) {
1616 case MLX5_CMD_DELIVERY_STAT_OK:
1617 case MLX5_DRIVER_STATUS_ABORTED:
1618 return 0;
1619 case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR:
1620 case MLX5_CMD_DELIVERY_STAT_TOK_ERR:
1621 return -EBADR;
1622 case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR:
1623 case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR:
1624 case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR:
1625 return -EFAULT;
1626 case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR:
1627 case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR:
1628 case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR:
1629 case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR:
1630 return -ENOMSG;
1631 case MLX5_CMD_DELIVERY_STAT_FW_ERR:
1632 return -EIO;
1633 default:
1634 return -EINVAL;
1635 }
1636}
1637
1638static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size,
1639 gfp_t gfp)
1640{
1641 struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM);
1642 struct cmd_msg_cache *ch = NULL;
1643 struct mlx5_cmd *cmd = &dev->cmd;
1644 int i;
1645
1646 if (in_size <= 16)
1647 goto cache_miss;
1648
1649 for (i = 0; i < MLX5_NUM_COMMAND_CACHES; i++) {
1650 ch = &cmd->cache[i];
1651 if (in_size > ch->max_inbox_size)
1652 continue;
1653 spin_lock_irq(&ch->lock);
1654 if (list_empty(&ch->head)) {
1655 spin_unlock_irq(&ch->lock);
1656 continue;
1657 }
1658 msg = list_entry(ch->head.next, typeof(*msg), list);
1659
1660
1661
1662 msg->len = in_size;
1663 list_del(&msg->list);
1664 spin_unlock_irq(&ch->lock);
1665 break;
1666 }
1667
1668 if (!IS_ERR(msg))
1669 return msg;
1670
1671cache_miss:
1672 msg = mlx5_alloc_cmd_msg(dev, gfp, in_size, 0);
1673 return msg;
1674}
1675
1676static int is_manage_pages(void *in)
1677{
1678 return MLX5_GET(mbox_in, in, opcode) == MLX5_CMD_OP_MANAGE_PAGES;
1679}
1680
1681static int cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out,
1682 int out_size, mlx5_cmd_cbk_t callback, void *context,
1683 bool force_polling)
1684{
1685 struct mlx5_cmd_msg *inb;
1686 struct mlx5_cmd_msg *outb;
1687 int pages_queue;
1688 gfp_t gfp;
1689 int err;
1690 u8 status = 0;
1691 u32 drv_synd;
1692 u8 token;
1693
1694 if (pci_channel_offline(dev->pdev) ||
1695 dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {
1696 u16 opcode = MLX5_GET(mbox_in, in, opcode);
1697
1698 err = mlx5_internal_err_ret_value(dev, opcode, &drv_synd, &status);
1699 MLX5_SET(mbox_out, out, status, status);
1700 MLX5_SET(mbox_out, out, syndrome, drv_synd);
1701 return err;
1702 }
1703
1704 pages_queue = is_manage_pages(in);
1705 gfp = callback ? GFP_ATOMIC : GFP_KERNEL;
1706
1707 inb = alloc_msg(dev, in_size, gfp);
1708 if (IS_ERR(inb)) {
1709 err = PTR_ERR(inb);
1710 return err;
1711 }
1712
1713 token = alloc_token(&dev->cmd);
1714
1715 err = mlx5_copy_to_msg(inb, in, in_size, token);
1716 if (err) {
1717 mlx5_core_warn(dev, "err %d\n", err);
1718 goto out_in;
1719 }
1720
1721 outb = mlx5_alloc_cmd_msg(dev, gfp, out_size, token);
1722 if (IS_ERR(outb)) {
1723 err = PTR_ERR(outb);
1724 goto out_in;
1725 }
1726
1727 err = mlx5_cmd_invoke(dev, inb, outb, out, out_size, callback, context,
1728 pages_queue, &status, token, force_polling);
1729 if (err)
1730 goto out_out;
1731
1732 mlx5_core_dbg(dev, "err %d, status %d\n", err, status);
1733 if (status) {
1734 err = status_to_err(status);
1735 goto out_out;
1736 }
1737
1738 if (!callback)
1739 err = mlx5_copy_from_msg(out, outb, out_size);
1740
1741out_out:
1742 if (!callback)
1743 mlx5_free_cmd_msg(dev, outb);
1744
1745out_in:
1746 if (!callback)
1747 free_msg(dev, inb);
1748 return err;
1749}
1750
1751int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out,
1752 int out_size)
1753{
1754 int err;
1755
1756 err = cmd_exec(dev, in, in_size, out, out_size, NULL, NULL, false);
1757 return err ? : mlx5_cmd_check(dev, in, out);
1758}
1759EXPORT_SYMBOL(mlx5_cmd_exec);
1760
1761void mlx5_cmd_init_async_ctx(struct mlx5_core_dev *dev,
1762 struct mlx5_async_ctx *ctx)
1763{
1764 ctx->dev = dev;
1765
1766 atomic_set(&ctx->num_inflight, 1);
1767 init_waitqueue_head(&ctx->wait);
1768}
1769EXPORT_SYMBOL(mlx5_cmd_init_async_ctx);
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779void mlx5_cmd_cleanup_async_ctx(struct mlx5_async_ctx *ctx)
1780{
1781 atomic_dec(&ctx->num_inflight);
1782 wait_event(ctx->wait, atomic_read(&ctx->num_inflight) == 0);
1783}
1784EXPORT_SYMBOL(mlx5_cmd_cleanup_async_ctx);
1785
1786static void mlx5_cmd_exec_cb_handler(int status, void *_work)
1787{
1788 struct mlx5_async_work *work = _work;
1789 struct mlx5_async_ctx *ctx = work->ctx;
1790
1791 work->user_callback(status, work);
1792 if (atomic_dec_and_test(&ctx->num_inflight))
1793 wake_up(&ctx->wait);
1794}
1795
1796int mlx5_cmd_exec_cb(struct mlx5_async_ctx *ctx, void *in, int in_size,
1797 void *out, int out_size, mlx5_async_cbk_t callback,
1798 struct mlx5_async_work *work)
1799{
1800 int ret;
1801
1802 work->ctx = ctx;
1803 work->user_callback = callback;
1804 if (WARN_ON(!atomic_inc_not_zero(&ctx->num_inflight)))
1805 return -EIO;
1806 ret = cmd_exec(ctx->dev, in, in_size, out, out_size,
1807 mlx5_cmd_exec_cb_handler, work, false);
1808 if (ret && atomic_dec_and_test(&ctx->num_inflight))
1809 wake_up(&ctx->wait);
1810
1811 return ret;
1812}
1813EXPORT_SYMBOL(mlx5_cmd_exec_cb);
1814
1815int mlx5_cmd_exec_polling(struct mlx5_core_dev *dev, void *in, int in_size,
1816 void *out, int out_size)
1817{
1818 int err;
1819
1820 err = cmd_exec(dev, in, in_size, out, out_size, NULL, NULL, true);
1821
1822 return err ? : mlx5_cmd_check(dev, in, out);
1823}
1824EXPORT_SYMBOL(mlx5_cmd_exec_polling);
1825
1826static void destroy_msg_cache(struct mlx5_core_dev *dev)
1827{
1828 struct cmd_msg_cache *ch;
1829 struct mlx5_cmd_msg *msg;
1830 struct mlx5_cmd_msg *n;
1831 int i;
1832
1833 for (i = 0; i < MLX5_NUM_COMMAND_CACHES; i++) {
1834 ch = &dev->cmd.cache[i];
1835 list_for_each_entry_safe(msg, n, &ch->head, list) {
1836 list_del(&msg->list);
1837 mlx5_free_cmd_msg(dev, msg);
1838 }
1839 }
1840}
1841
1842static unsigned cmd_cache_num_ent[MLX5_NUM_COMMAND_CACHES] = {
1843 512, 32, 16, 8, 2
1844};
1845
1846static unsigned cmd_cache_ent_size[MLX5_NUM_COMMAND_CACHES] = {
1847 16 + MLX5_CMD_DATA_BLOCK_SIZE,
1848 16 + MLX5_CMD_DATA_BLOCK_SIZE * 2,
1849 16 + MLX5_CMD_DATA_BLOCK_SIZE * 16,
1850 16 + MLX5_CMD_DATA_BLOCK_SIZE * 256,
1851 16 + MLX5_CMD_DATA_BLOCK_SIZE * 512,
1852};
1853
1854static void create_msg_cache(struct mlx5_core_dev *dev)
1855{
1856 struct mlx5_cmd *cmd = &dev->cmd;
1857 struct cmd_msg_cache *ch;
1858 struct mlx5_cmd_msg *msg;
1859 int i;
1860 int k;
1861
1862
1863 for (k = 0; k < MLX5_NUM_COMMAND_CACHES; k++) {
1864 ch = &cmd->cache[k];
1865 spin_lock_init(&ch->lock);
1866 INIT_LIST_HEAD(&ch->head);
1867 ch->num_ent = cmd_cache_num_ent[k];
1868 ch->max_inbox_size = cmd_cache_ent_size[k];
1869 for (i = 0; i < ch->num_ent; i++) {
1870 msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL | __GFP_NOWARN,
1871 ch->max_inbox_size, 0);
1872 if (IS_ERR(msg))
1873 break;
1874 msg->parent = ch;
1875 list_add_tail(&msg->list, &ch->head);
1876 }
1877 }
1878}
1879
1880static int alloc_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd)
1881{
1882 struct device *ddev = dev->device;
1883
1884 cmd->cmd_alloc_buf = dma_alloc_coherent(ddev, MLX5_ADAPTER_PAGE_SIZE,
1885 &cmd->alloc_dma, GFP_KERNEL);
1886 if (!cmd->cmd_alloc_buf)
1887 return -ENOMEM;
1888
1889
1890 if (!((uintptr_t)cmd->cmd_alloc_buf & (MLX5_ADAPTER_PAGE_SIZE - 1))) {
1891 cmd->cmd_buf = cmd->cmd_alloc_buf;
1892 cmd->dma = cmd->alloc_dma;
1893 cmd->alloc_size = MLX5_ADAPTER_PAGE_SIZE;
1894 return 0;
1895 }
1896
1897 dma_free_coherent(ddev, MLX5_ADAPTER_PAGE_SIZE, cmd->cmd_alloc_buf,
1898 cmd->alloc_dma);
1899 cmd->cmd_alloc_buf = dma_alloc_coherent(ddev,
1900 2 * MLX5_ADAPTER_PAGE_SIZE - 1,
1901 &cmd->alloc_dma, GFP_KERNEL);
1902 if (!cmd->cmd_alloc_buf)
1903 return -ENOMEM;
1904
1905 cmd->cmd_buf = PTR_ALIGN(cmd->cmd_alloc_buf, MLX5_ADAPTER_PAGE_SIZE);
1906 cmd->dma = ALIGN(cmd->alloc_dma, MLX5_ADAPTER_PAGE_SIZE);
1907 cmd->alloc_size = 2 * MLX5_ADAPTER_PAGE_SIZE - 1;
1908 return 0;
1909}
1910
1911static void free_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd)
1912{
1913 struct device *ddev = dev->device;
1914
1915 dma_free_coherent(ddev, cmd->alloc_size, cmd->cmd_alloc_buf,
1916 cmd->alloc_dma);
1917}
1918
1919int mlx5_cmd_init(struct mlx5_core_dev *dev)
1920{
1921 int size = sizeof(struct mlx5_cmd_prot_block);
1922 int align = roundup_pow_of_two(size);
1923 struct mlx5_cmd *cmd = &dev->cmd;
1924 u32 cmd_h, cmd_l;
1925 u16 cmd_if_rev;
1926 int err;
1927 int i;
1928
1929 memset(cmd, 0, sizeof(*cmd));
1930 cmd_if_rev = cmdif_rev(dev);
1931 if (cmd_if_rev != CMD_IF_REV) {
1932 mlx5_core_err(dev,
1933 "Driver cmdif rev(%d) differs from firmware's(%d)\n",
1934 CMD_IF_REV, cmd_if_rev);
1935 return -EINVAL;
1936 }
1937
1938 cmd->pool = dma_pool_create("mlx5_cmd", dev->device, size, align, 0);
1939 if (!cmd->pool)
1940 return -ENOMEM;
1941
1942 err = alloc_cmd_page(dev, cmd);
1943 if (err)
1944 goto err_free_pool;
1945
1946 cmd_l = ioread32be(&dev->iseg->cmdq_addr_l_sz) & 0xff;
1947 cmd->log_sz = cmd_l >> 4 & 0xf;
1948 cmd->log_stride = cmd_l & 0xf;
1949 if (1 << cmd->log_sz > MLX5_MAX_COMMANDS) {
1950 mlx5_core_err(dev, "firmware reports too many outstanding commands %d\n",
1951 1 << cmd->log_sz);
1952 err = -EINVAL;
1953 goto err_free_page;
1954 }
1955
1956 if (cmd->log_sz + cmd->log_stride > MLX5_ADAPTER_PAGE_SHIFT) {
1957 mlx5_core_err(dev, "command queue size overflow\n");
1958 err = -EINVAL;
1959 goto err_free_page;
1960 }
1961
1962 cmd->checksum_disabled = 1;
1963 cmd->max_reg_cmds = (1 << cmd->log_sz) - 1;
1964 cmd->bitmask = (1UL << cmd->max_reg_cmds) - 1;
1965
1966 cmd->cmdif_rev = ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16;
1967 if (cmd->cmdif_rev > CMD_IF_REV) {
1968 mlx5_core_err(dev, "driver does not support command interface version. driver %d, firmware %d\n",
1969 CMD_IF_REV, cmd->cmdif_rev);
1970 err = -EOPNOTSUPP;
1971 goto err_free_page;
1972 }
1973
1974 spin_lock_init(&cmd->alloc_lock);
1975 spin_lock_init(&cmd->token_lock);
1976 for (i = 0; i < ARRAY_SIZE(cmd->stats); i++)
1977 spin_lock_init(&cmd->stats[i].lock);
1978
1979 sema_init(&cmd->sem, cmd->max_reg_cmds);
1980 sema_init(&cmd->pages_sem, 1);
1981
1982 cmd_h = (u32)((u64)(cmd->dma) >> 32);
1983 cmd_l = (u32)(cmd->dma);
1984 if (cmd_l & 0xfff) {
1985 mlx5_core_err(dev, "invalid command queue address\n");
1986 err = -ENOMEM;
1987 goto err_free_page;
1988 }
1989
1990 iowrite32be(cmd_h, &dev->iseg->cmdq_addr_h);
1991 iowrite32be(cmd_l, &dev->iseg->cmdq_addr_l_sz);
1992
1993
1994 wmb();
1995
1996 mlx5_core_dbg(dev, "descriptor at dma 0x%llx\n", (unsigned long long)(cmd->dma));
1997
1998 cmd->mode = CMD_MODE_POLLING;
1999
2000 create_msg_cache(dev);
2001
2002 set_wqname(dev);
2003 cmd->wq = create_singlethread_workqueue(cmd->wq_name);
2004 if (!cmd->wq) {
2005 mlx5_core_err(dev, "failed to create command workqueue\n");
2006 err = -ENOMEM;
2007 goto err_cache;
2008 }
2009
2010 err = create_debugfs_files(dev);
2011 if (err) {
2012 err = -ENOMEM;
2013 goto err_wq;
2014 }
2015
2016 return 0;
2017
2018err_wq:
2019 destroy_workqueue(cmd->wq);
2020
2021err_cache:
2022 destroy_msg_cache(dev);
2023
2024err_free_page:
2025 free_cmd_page(dev, cmd);
2026
2027err_free_pool:
2028 dma_pool_destroy(cmd->pool);
2029
2030 return err;
2031}
2032EXPORT_SYMBOL(mlx5_cmd_init);
2033
2034void mlx5_cmd_cleanup(struct mlx5_core_dev *dev)
2035{
2036 struct mlx5_cmd *cmd = &dev->cmd;
2037
2038 clean_debug_files(dev);
2039 destroy_workqueue(cmd->wq);
2040 destroy_msg_cache(dev);
2041 free_cmd_page(dev, cmd);
2042 dma_pool_destroy(cmd->pool);
2043}
2044EXPORT_SYMBOL(mlx5_cmd_cleanup);
2045
