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Merge branch 'vm' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[deliverable/linux.git] / drivers / net / ethernet / mellanox / mlx4 / cmd.c
1 /*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35 #include <linux/sched.h>
36 #include <linux/slab.h>
37 #include <linux/export.h>
38 #include <linux/pci.h>
39 #include <linux/errno.h>
40
41 #include <linux/mlx4/cmd.h>
42 #include <linux/semaphore.h>
43
44 #include <asm/io.h>
45
46 #include "mlx4.h"
47 #include "fw.h"
48
49 #define CMD_POLL_TOKEN 0xffff
50 #define INBOX_MASK 0xffffffffffffff00ULL
51
52 #define CMD_CHAN_VER 1
53 #define CMD_CHAN_IF_REV 1
54
55 enum {
56 /* command completed successfully: */
57 CMD_STAT_OK = 0x00,
58 /* Internal error (such as a bus error) occurred while processing command: */
59 CMD_STAT_INTERNAL_ERR = 0x01,
60 /* Operation/command not supported or opcode modifier not supported: */
61 CMD_STAT_BAD_OP = 0x02,
62 /* Parameter not supported or parameter out of range: */
63 CMD_STAT_BAD_PARAM = 0x03,
64 /* System not enabled or bad system state: */
65 CMD_STAT_BAD_SYS_STATE = 0x04,
66 /* Attempt to access reserved or unallocaterd resource: */
67 CMD_STAT_BAD_RESOURCE = 0x05,
68 /* Requested resource is currently executing a command, or is otherwise busy: */
69 CMD_STAT_RESOURCE_BUSY = 0x06,
70 /* Required capability exceeds device limits: */
71 CMD_STAT_EXCEED_LIM = 0x08,
72 /* Resource is not in the appropriate state or ownership: */
73 CMD_STAT_BAD_RES_STATE = 0x09,
74 /* Index out of range: */
75 CMD_STAT_BAD_INDEX = 0x0a,
76 /* FW image corrupted: */
77 CMD_STAT_BAD_NVMEM = 0x0b,
78 /* Error in ICM mapping (e.g. not enough auxiliary ICM pages to execute command): */
79 CMD_STAT_ICM_ERROR = 0x0c,
80 /* Attempt to modify a QP/EE which is not in the presumed state: */
81 CMD_STAT_BAD_QP_STATE = 0x10,
82 /* Bad segment parameters (Address/Size): */
83 CMD_STAT_BAD_SEG_PARAM = 0x20,
84 /* Memory Region has Memory Windows bound to: */
85 CMD_STAT_REG_BOUND = 0x21,
86 /* HCA local attached memory not present: */
87 CMD_STAT_LAM_NOT_PRE = 0x22,
88 /* Bad management packet (silently discarded): */
89 CMD_STAT_BAD_PKT = 0x30,
90 /* More outstanding CQEs in CQ than new CQ size: */
91 CMD_STAT_BAD_SIZE = 0x40,
92 /* Multi Function device support required: */
93 CMD_STAT_MULTI_FUNC_REQ = 0x50,
94 };
95
96 enum {
97 HCR_IN_PARAM_OFFSET = 0x00,
98 HCR_IN_MODIFIER_OFFSET = 0x08,
99 HCR_OUT_PARAM_OFFSET = 0x0c,
100 HCR_TOKEN_OFFSET = 0x14,
101 HCR_STATUS_OFFSET = 0x18,
102
103 HCR_OPMOD_SHIFT = 12,
104 HCR_T_BIT = 21,
105 HCR_E_BIT = 22,
106 HCR_GO_BIT = 23
107 };
108
109 enum {
110 GO_BIT_TIMEOUT_MSECS = 10000
111 };
112
113 struct mlx4_cmd_context {
114 struct completion done;
115 int result;
116 int next;
117 u64 out_param;
118 u16 token;
119 u8 fw_status;
120 };
121
122 static int mlx4_master_process_vhcr(struct mlx4_dev *dev, int slave,
123 struct mlx4_vhcr_cmd *in_vhcr);
124
125 static int mlx4_status_to_errno(u8 status)
126 {
127 static const int trans_table[] = {
128 [CMD_STAT_INTERNAL_ERR] = -EIO,
129 [CMD_STAT_BAD_OP] = -EPERM,
130 [CMD_STAT_BAD_PARAM] = -EINVAL,
131 [CMD_STAT_BAD_SYS_STATE] = -ENXIO,
132 [CMD_STAT_BAD_RESOURCE] = -EBADF,
133 [CMD_STAT_RESOURCE_BUSY] = -EBUSY,
134 [CMD_STAT_EXCEED_LIM] = -ENOMEM,
135 [CMD_STAT_BAD_RES_STATE] = -EBADF,
136 [CMD_STAT_BAD_INDEX] = -EBADF,
137 [CMD_STAT_BAD_NVMEM] = -EFAULT,
138 [CMD_STAT_ICM_ERROR] = -ENFILE,
139 [CMD_STAT_BAD_QP_STATE] = -EINVAL,
140 [CMD_STAT_BAD_SEG_PARAM] = -EFAULT,
141 [CMD_STAT_REG_BOUND] = -EBUSY,
142 [CMD_STAT_LAM_NOT_PRE] = -EAGAIN,
143 [CMD_STAT_BAD_PKT] = -EINVAL,
144 [CMD_STAT_BAD_SIZE] = -ENOMEM,
145 [CMD_STAT_MULTI_FUNC_REQ] = -EACCES,
146 };
147
148 if (status >= ARRAY_SIZE(trans_table) ||
149 (status != CMD_STAT_OK && trans_table[status] == 0))
150 return -EIO;
151
152 return trans_table[status];
153 }
154
155 static u8 mlx4_errno_to_status(int errno)
156 {
157 switch (errno) {
158 case -EPERM:
159 return CMD_STAT_BAD_OP;
160 case -EINVAL:
161 return CMD_STAT_BAD_PARAM;
162 case -ENXIO:
163 return CMD_STAT_BAD_SYS_STATE;
164 case -EBUSY:
165 return CMD_STAT_RESOURCE_BUSY;
166 case -ENOMEM:
167 return CMD_STAT_EXCEED_LIM;
168 case -ENFILE:
169 return CMD_STAT_ICM_ERROR;
170 default:
171 return CMD_STAT_INTERNAL_ERR;
172 }
173 }
174
175 static int comm_pending(struct mlx4_dev *dev)
176 {
177 struct mlx4_priv *priv = mlx4_priv(dev);
178 u32 status = readl(&priv->mfunc.comm->slave_read);
179
180 return (swab32(status) >> 31) != priv->cmd.comm_toggle;
181 }
182
183 static void mlx4_comm_cmd_post(struct mlx4_dev *dev, u8 cmd, u16 param)
184 {
185 struct mlx4_priv *priv = mlx4_priv(dev);
186 u32 val;
187
188 priv->cmd.comm_toggle ^= 1;
189 val = param | (cmd << 16) | (priv->cmd.comm_toggle << 31);
190 __raw_writel((__force u32) cpu_to_be32(val),
191 &priv->mfunc.comm->slave_write);
192 mmiowb();
193 }
194
195 static int mlx4_comm_cmd_poll(struct mlx4_dev *dev, u8 cmd, u16 param,
196 unsigned long timeout)
197 {
198 struct mlx4_priv *priv = mlx4_priv(dev);
199 unsigned long end;
200 int err = 0;
201 int ret_from_pending = 0;
202
203 /* First, verify that the master reports correct status */
204 if (comm_pending(dev)) {
205 mlx4_warn(dev, "Communication channel is not idle."
206 "my toggle is %d (cmd:0x%x)\n",
207 priv->cmd.comm_toggle, cmd);
208 return -EAGAIN;
209 }
210
211 /* Write command */
212 down(&priv->cmd.poll_sem);
213 mlx4_comm_cmd_post(dev, cmd, param);
214
215 end = msecs_to_jiffies(timeout) + jiffies;
216 while (comm_pending(dev) && time_before(jiffies, end))
217 cond_resched();
218 ret_from_pending = comm_pending(dev);
219 if (ret_from_pending) {
220 /* check if the slave is trying to boot in the middle of
221 * FLR process. The only non-zero result in the RESET command
222 * is MLX4_DELAY_RESET_SLAVE*/
223 if ((MLX4_COMM_CMD_RESET == cmd)) {
224 mlx4_warn(dev, "Got slave FLRed from Communication"
225 " channel (ret:0x%x)\n", ret_from_pending);
226 err = MLX4_DELAY_RESET_SLAVE;
227 } else {
228 mlx4_warn(dev, "Communication channel timed out\n");
229 err = -ETIMEDOUT;
230 }
231 }
232
233 up(&priv->cmd.poll_sem);
234 return err;
235 }
236
237 static int mlx4_comm_cmd_wait(struct mlx4_dev *dev, u8 op,
238 u16 param, unsigned long timeout)
239 {
240 struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
241 struct mlx4_cmd_context *context;
242 unsigned long end;
243 int err = 0;
244
245 down(&cmd->event_sem);
246
247 spin_lock(&cmd->context_lock);
248 BUG_ON(cmd->free_head < 0);
249 context = &cmd->context[cmd->free_head];
250 context->token += cmd->token_mask + 1;
251 cmd->free_head = context->next;
252 spin_unlock(&cmd->context_lock);
253
254 init_completion(&context->done);
255
256 mlx4_comm_cmd_post(dev, op, param);
257
258 if (!wait_for_completion_timeout(&context->done,
259 msecs_to_jiffies(timeout))) {
260 err = -EBUSY;
261 goto out;
262 }
263
264 err = context->result;
265 if (err && context->fw_status != CMD_STAT_MULTI_FUNC_REQ) {
266 mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
267 op, context->fw_status);
268 goto out;
269 }
270
271 out:
272 /* wait for comm channel ready
273 * this is necessary for prevention the race
274 * when switching between event to polling mode
275 */
276 end = msecs_to_jiffies(timeout) + jiffies;
277 while (comm_pending(dev) && time_before(jiffies, end))
278 cond_resched();
279
280 spin_lock(&cmd->context_lock);
281 context->next = cmd->free_head;
282 cmd->free_head = context - cmd->context;
283 spin_unlock(&cmd->context_lock);
284
285 up(&cmd->event_sem);
286 return err;
287 }
288
289 int mlx4_comm_cmd(struct mlx4_dev *dev, u8 cmd, u16 param,
290 unsigned long timeout)
291 {
292 if (mlx4_priv(dev)->cmd.use_events)
293 return mlx4_comm_cmd_wait(dev, cmd, param, timeout);
294 return mlx4_comm_cmd_poll(dev, cmd, param, timeout);
295 }
296
297 static int cmd_pending(struct mlx4_dev *dev)
298 {
299 u32 status = readl(mlx4_priv(dev)->cmd.hcr + HCR_STATUS_OFFSET);
300
301 return (status & swab32(1 << HCR_GO_BIT)) ||
302 (mlx4_priv(dev)->cmd.toggle ==
303 !!(status & swab32(1 << HCR_T_BIT)));
304 }
305
306 static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param,
307 u32 in_modifier, u8 op_modifier, u16 op, u16 token,
308 int event)
309 {
310 struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
311 u32 __iomem *hcr = cmd->hcr;
312 int ret = -EAGAIN;
313 unsigned long end;
314
315 mutex_lock(&cmd->hcr_mutex);
316
317 end = jiffies;
318 if (event)
319 end += msecs_to_jiffies(GO_BIT_TIMEOUT_MSECS);
320
321 while (cmd_pending(dev)) {
322 if (time_after_eq(jiffies, end)) {
323 mlx4_err(dev, "%s:cmd_pending failed\n", __func__);
324 goto out;
325 }
326 cond_resched();
327 }
328
329 /*
330 * We use writel (instead of something like memcpy_toio)
331 * because writes of less than 32 bits to the HCR don't work
332 * (and some architectures such as ia64 implement memcpy_toio
333 * in terms of writeb).
334 */
335 __raw_writel((__force u32) cpu_to_be32(in_param >> 32), hcr + 0);
336 __raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful), hcr + 1);
337 __raw_writel((__force u32) cpu_to_be32(in_modifier), hcr + 2);
338 __raw_writel((__force u32) cpu_to_be32(out_param >> 32), hcr + 3);
339 __raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), hcr + 4);
340 __raw_writel((__force u32) cpu_to_be32(token << 16), hcr + 5);
341
342 /* __raw_writel may not order writes. */
343 wmb();
344
345 __raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT) |
346 (cmd->toggle << HCR_T_BIT) |
347 (event ? (1 << HCR_E_BIT) : 0) |
348 (op_modifier << HCR_OPMOD_SHIFT) |
349 op), hcr + 6);
350
351 /*
352 * Make sure that our HCR writes don't get mixed in with
353 * writes from another CPU starting a FW command.
354 */
355 mmiowb();
356
357 cmd->toggle = cmd->toggle ^ 1;
358
359 ret = 0;
360
361 out:
362 mutex_unlock(&cmd->hcr_mutex);
363 return ret;
364 }
365
366 static int mlx4_slave_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
367 int out_is_imm, u32 in_modifier, u8 op_modifier,
368 u16 op, unsigned long timeout)
369 {
370 struct mlx4_priv *priv = mlx4_priv(dev);
371 struct mlx4_vhcr_cmd *vhcr = priv->mfunc.vhcr;
372 int ret;
373
374 down(&priv->cmd.slave_sem);
375 vhcr->in_param = cpu_to_be64(in_param);
376 vhcr->out_param = out_param ? cpu_to_be64(*out_param) : 0;
377 vhcr->in_modifier = cpu_to_be32(in_modifier);
378 vhcr->opcode = cpu_to_be16((((u16) op_modifier) << 12) | (op & 0xfff));
379 vhcr->token = cpu_to_be16(CMD_POLL_TOKEN);
380 vhcr->status = 0;
381 vhcr->flags = !!(priv->cmd.use_events) << 6;
382 if (mlx4_is_master(dev)) {
383 ret = mlx4_master_process_vhcr(dev, dev->caps.function, vhcr);
384 if (!ret) {
385 if (out_is_imm) {
386 if (out_param)
387 *out_param =
388 be64_to_cpu(vhcr->out_param);
389 else {
390 mlx4_err(dev, "response expected while"
391 "output mailbox is NULL for "
392 "command 0x%x\n", op);
393 vhcr->status = CMD_STAT_BAD_PARAM;
394 }
395 }
396 ret = mlx4_status_to_errno(vhcr->status);
397 }
398 } else {
399 ret = mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR_POST, 0,
400 MLX4_COMM_TIME + timeout);
401 if (!ret) {
402 if (out_is_imm) {
403 if (out_param)
404 *out_param =
405 be64_to_cpu(vhcr->out_param);
406 else {
407 mlx4_err(dev, "response expected while"
408 "output mailbox is NULL for "
409 "command 0x%x\n", op);
410 vhcr->status = CMD_STAT_BAD_PARAM;
411 }
412 }
413 ret = mlx4_status_to_errno(vhcr->status);
414 } else
415 mlx4_err(dev, "failed execution of VHCR_POST command"
416 "opcode 0x%x\n", op);
417 }
418 up(&priv->cmd.slave_sem);
419 return ret;
420 }
421
422 static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
423 int out_is_imm, u32 in_modifier, u8 op_modifier,
424 u16 op, unsigned long timeout)
425 {
426 struct mlx4_priv *priv = mlx4_priv(dev);
427 void __iomem *hcr = priv->cmd.hcr;
428 int err = 0;
429 unsigned long end;
430 u32 stat;
431
432 down(&priv->cmd.poll_sem);
433
434 err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
435 in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0);
436 if (err)
437 goto out;
438
439 end = msecs_to_jiffies(timeout) + jiffies;
440 while (cmd_pending(dev) && time_before(jiffies, end))
441 cond_resched();
442
443 if (cmd_pending(dev)) {
444 err = -ETIMEDOUT;
445 goto out;
446 }
447
448 if (out_is_imm)
449 *out_param =
450 (u64) be32_to_cpu((__force __be32)
451 __raw_readl(hcr + HCR_OUT_PARAM_OFFSET)) << 32 |
452 (u64) be32_to_cpu((__force __be32)
453 __raw_readl(hcr + HCR_OUT_PARAM_OFFSET + 4));
454 stat = be32_to_cpu((__force __be32)
455 __raw_readl(hcr + HCR_STATUS_OFFSET)) >> 24;
456 err = mlx4_status_to_errno(stat);
457 if (err)
458 mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
459 op, stat);
460
461 out:
462 up(&priv->cmd.poll_sem);
463 return err;
464 }
465
466 void mlx4_cmd_event(struct mlx4_dev *dev, u16 token, u8 status, u64 out_param)
467 {
468 struct mlx4_priv *priv = mlx4_priv(dev);
469 struct mlx4_cmd_context *context =
470 &priv->cmd.context[token & priv->cmd.token_mask];
471
472 /* previously timed out command completing at long last */
473 if (token != context->token)
474 return;
475
476 context->fw_status = status;
477 context->result = mlx4_status_to_errno(status);
478 context->out_param = out_param;
479
480 complete(&context->done);
481 }
482
483 static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
484 int out_is_imm, u32 in_modifier, u8 op_modifier,
485 u16 op, unsigned long timeout)
486 {
487 struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
488 struct mlx4_cmd_context *context;
489 int err = 0;
490
491 down(&cmd->event_sem);
492
493 spin_lock(&cmd->context_lock);
494 BUG_ON(cmd->free_head < 0);
495 context = &cmd->context[cmd->free_head];
496 context->token += cmd->token_mask + 1;
497 cmd->free_head = context->next;
498 spin_unlock(&cmd->context_lock);
499
500 init_completion(&context->done);
501
502 mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
503 in_modifier, op_modifier, op, context->token, 1);
504
505 if (!wait_for_completion_timeout(&context->done,
506 msecs_to_jiffies(timeout))) {
507 err = -EBUSY;
508 goto out;
509 }
510
511 err = context->result;
512 if (err) {
513 mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
514 op, context->fw_status);
515 goto out;
516 }
517
518 if (out_is_imm)
519 *out_param = context->out_param;
520
521 out:
522 spin_lock(&cmd->context_lock);
523 context->next = cmd->free_head;
524 cmd->free_head = context - cmd->context;
525 spin_unlock(&cmd->context_lock);
526
527 up(&cmd->event_sem);
528 return err;
529 }
530
531 int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
532 int out_is_imm, u32 in_modifier, u8 op_modifier,
533 u16 op, unsigned long timeout, int native)
534 {
535 if (!mlx4_is_mfunc(dev) || (native && mlx4_is_master(dev))) {
536 if (mlx4_priv(dev)->cmd.use_events)
537 return mlx4_cmd_wait(dev, in_param, out_param,
538 out_is_imm, in_modifier,
539 op_modifier, op, timeout);
540 else
541 return mlx4_cmd_poll(dev, in_param, out_param,
542 out_is_imm, in_modifier,
543 op_modifier, op, timeout);
544 }
545 return mlx4_slave_cmd(dev, in_param, out_param, out_is_imm,
546 in_modifier, op_modifier, op, timeout);
547 }
548 EXPORT_SYMBOL_GPL(__mlx4_cmd);
549
550
551 static int mlx4_ARM_COMM_CHANNEL(struct mlx4_dev *dev)
552 {
553 return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_ARM_COMM_CHANNEL,
554 MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
555 }
556
557 static int mlx4_ACCESS_MEM(struct mlx4_dev *dev, u64 master_addr,
558 int slave, u64 slave_addr,
559 int size, int is_read)
560 {
561 u64 in_param;
562 u64 out_param;
563
564 if ((slave_addr & 0xfff) | (master_addr & 0xfff) |
565 (slave & ~0x7f) | (size & 0xff)) {
566 mlx4_err(dev, "Bad access mem params - slave_addr:0x%llx "
567 "master_addr:0x%llx slave_id:%d size:%d\n",
568 slave_addr, master_addr, slave, size);
569 return -EINVAL;
570 }
571
572 if (is_read) {
573 in_param = (u64) slave | slave_addr;
574 out_param = (u64) dev->caps.function | master_addr;
575 } else {
576 in_param = (u64) dev->caps.function | master_addr;
577 out_param = (u64) slave | slave_addr;
578 }
579
580 return mlx4_cmd_imm(dev, in_param, &out_param, size, 0,
581 MLX4_CMD_ACCESS_MEM,
582 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
583 }
584
585 int mlx4_DMA_wrapper(struct mlx4_dev *dev, int slave,
586 struct mlx4_vhcr *vhcr,
587 struct mlx4_cmd_mailbox *inbox,
588 struct mlx4_cmd_mailbox *outbox,
589 struct mlx4_cmd_info *cmd)
590 {
591 u64 in_param;
592 u64 out_param;
593 int err;
594
595 in_param = cmd->has_inbox ? (u64) inbox->dma : vhcr->in_param;
596 out_param = cmd->has_outbox ? (u64) outbox->dma : vhcr->out_param;
597 if (cmd->encode_slave_id) {
598 in_param &= 0xffffffffffffff00ll;
599 in_param |= slave;
600 }
601
602 err = __mlx4_cmd(dev, in_param, &out_param, cmd->out_is_imm,
603 vhcr->in_modifier, vhcr->op_modifier, vhcr->op,
604 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
605
606 if (cmd->out_is_imm)
607 vhcr->out_param = out_param;
608
609 return err;
610 }
611
612 static struct mlx4_cmd_info cmd_info[] = {
613 {
614 .opcode = MLX4_CMD_QUERY_FW,
615 .has_inbox = false,
616 .has_outbox = true,
617 .out_is_imm = false,
618 .encode_slave_id = false,
619 .verify = NULL,
620 .wrapper = NULL
621 },
622 {
623 .opcode = MLX4_CMD_QUERY_HCA,
624 .has_inbox = false,
625 .has_outbox = true,
626 .out_is_imm = false,
627 .encode_slave_id = false,
628 .verify = NULL,
629 .wrapper = NULL
630 },
631 {
632 .opcode = MLX4_CMD_QUERY_DEV_CAP,
633 .has_inbox = false,
634 .has_outbox = true,
635 .out_is_imm = false,
636 .encode_slave_id = false,
637 .verify = NULL,
638 .wrapper = NULL
639 },
640 {
641 .opcode = MLX4_CMD_QUERY_FUNC_CAP,
642 .has_inbox = false,
643 .has_outbox = true,
644 .out_is_imm = false,
645 .encode_slave_id = false,
646 .verify = NULL,
647 .wrapper = mlx4_QUERY_FUNC_CAP_wrapper
648 },
649 {
650 .opcode = MLX4_CMD_QUERY_ADAPTER,
651 .has_inbox = false,
652 .has_outbox = true,
653 .out_is_imm = false,
654 .encode_slave_id = false,
655 .verify = NULL,
656 .wrapper = NULL
657 },
658 {
659 .opcode = MLX4_CMD_INIT_PORT,
660 .has_inbox = false,
661 .has_outbox = false,
662 .out_is_imm = false,
663 .encode_slave_id = false,
664 .verify = NULL,
665 .wrapper = mlx4_INIT_PORT_wrapper
666 },
667 {
668 .opcode = MLX4_CMD_CLOSE_PORT,
669 .has_inbox = false,
670 .has_outbox = false,
671 .out_is_imm = false,
672 .encode_slave_id = false,
673 .verify = NULL,
674 .wrapper = mlx4_CLOSE_PORT_wrapper
675 },
676 {
677 .opcode = MLX4_CMD_QUERY_PORT,
678 .has_inbox = false,
679 .has_outbox = true,
680 .out_is_imm = false,
681 .encode_slave_id = false,
682 .verify = NULL,
683 .wrapper = mlx4_QUERY_PORT_wrapper
684 },
685 {
686 .opcode = MLX4_CMD_SET_PORT,
687 .has_inbox = true,
688 .has_outbox = false,
689 .out_is_imm = false,
690 .encode_slave_id = false,
691 .verify = NULL,
692 .wrapper = mlx4_SET_PORT_wrapper
693 },
694 {
695 .opcode = MLX4_CMD_MAP_EQ,
696 .has_inbox = false,
697 .has_outbox = false,
698 .out_is_imm = false,
699 .encode_slave_id = false,
700 .verify = NULL,
701 .wrapper = mlx4_MAP_EQ_wrapper
702 },
703 {
704 .opcode = MLX4_CMD_SW2HW_EQ,
705 .has_inbox = true,
706 .has_outbox = false,
707 .out_is_imm = false,
708 .encode_slave_id = true,
709 .verify = NULL,
710 .wrapper = mlx4_SW2HW_EQ_wrapper
711 },
712 {
713 .opcode = MLX4_CMD_HW_HEALTH_CHECK,
714 .has_inbox = false,
715 .has_outbox = false,
716 .out_is_imm = false,
717 .encode_slave_id = false,
718 .verify = NULL,
719 .wrapper = NULL
720 },
721 {
722 .opcode = MLX4_CMD_NOP,
723 .has_inbox = false,
724 .has_outbox = false,
725 .out_is_imm = false,
726 .encode_slave_id = false,
727 .verify = NULL,
728 .wrapper = NULL
729 },
730 {
731 .opcode = MLX4_CMD_ALLOC_RES,
732 .has_inbox = false,
733 .has_outbox = false,
734 .out_is_imm = true,
735 .encode_slave_id = false,
736 .verify = NULL,
737 .wrapper = mlx4_ALLOC_RES_wrapper
738 },
739 {
740 .opcode = MLX4_CMD_FREE_RES,
741 .has_inbox = false,
742 .has_outbox = false,
743 .out_is_imm = false,
744 .encode_slave_id = false,
745 .verify = NULL,
746 .wrapper = mlx4_FREE_RES_wrapper
747 },
748 {
749 .opcode = MLX4_CMD_SW2HW_MPT,
750 .has_inbox = true,
751 .has_outbox = false,
752 .out_is_imm = false,
753 .encode_slave_id = true,
754 .verify = NULL,
755 .wrapper = mlx4_SW2HW_MPT_wrapper
756 },
757 {
758 .opcode = MLX4_CMD_QUERY_MPT,
759 .has_inbox = false,
760 .has_outbox = true,
761 .out_is_imm = false,
762 .encode_slave_id = false,
763 .verify = NULL,
764 .wrapper = mlx4_QUERY_MPT_wrapper
765 },
766 {
767 .opcode = MLX4_CMD_HW2SW_MPT,
768 .has_inbox = false,
769 .has_outbox = false,
770 .out_is_imm = false,
771 .encode_slave_id = false,
772 .verify = NULL,
773 .wrapper = mlx4_HW2SW_MPT_wrapper
774 },
775 {
776 .opcode = MLX4_CMD_READ_MTT,
777 .has_inbox = false,
778 .has_outbox = true,
779 .out_is_imm = false,
780 .encode_slave_id = false,
781 .verify = NULL,
782 .wrapper = NULL
783 },
784 {
785 .opcode = MLX4_CMD_WRITE_MTT,
786 .has_inbox = true,
787 .has_outbox = false,
788 .out_is_imm = false,
789 .encode_slave_id = false,
790 .verify = NULL,
791 .wrapper = mlx4_WRITE_MTT_wrapper
792 },
793 {
794 .opcode = MLX4_CMD_SYNC_TPT,
795 .has_inbox = true,
796 .has_outbox = false,
797 .out_is_imm = false,
798 .encode_slave_id = false,
799 .verify = NULL,
800 .wrapper = NULL
801 },
802 {
803 .opcode = MLX4_CMD_HW2SW_EQ,
804 .has_inbox = false,
805 .has_outbox = true,
806 .out_is_imm = false,
807 .encode_slave_id = true,
808 .verify = NULL,
809 .wrapper = mlx4_HW2SW_EQ_wrapper
810 },
811 {
812 .opcode = MLX4_CMD_QUERY_EQ,
813 .has_inbox = false,
814 .has_outbox = true,
815 .out_is_imm = false,
816 .encode_slave_id = true,
817 .verify = NULL,
818 .wrapper = mlx4_QUERY_EQ_wrapper
819 },
820 {
821 .opcode = MLX4_CMD_SW2HW_CQ,
822 .has_inbox = true,
823 .has_outbox = false,
824 .out_is_imm = false,
825 .encode_slave_id = true,
826 .verify = NULL,
827 .wrapper = mlx4_SW2HW_CQ_wrapper
828 },
829 {
830 .opcode = MLX4_CMD_HW2SW_CQ,
831 .has_inbox = false,
832 .has_outbox = false,
833 .out_is_imm = false,
834 .encode_slave_id = false,
835 .verify = NULL,
836 .wrapper = mlx4_HW2SW_CQ_wrapper
837 },
838 {
839 .opcode = MLX4_CMD_QUERY_CQ,
840 .has_inbox = false,
841 .has_outbox = true,
842 .out_is_imm = false,
843 .encode_slave_id = false,
844 .verify = NULL,
845 .wrapper = mlx4_QUERY_CQ_wrapper
846 },
847 {
848 .opcode = MLX4_CMD_MODIFY_CQ,
849 .has_inbox = true,
850 .has_outbox = false,
851 .out_is_imm = true,
852 .encode_slave_id = false,
853 .verify = NULL,
854 .wrapper = mlx4_MODIFY_CQ_wrapper
855 },
856 {
857 .opcode = MLX4_CMD_SW2HW_SRQ,
858 .has_inbox = true,
859 .has_outbox = false,
860 .out_is_imm = false,
861 .encode_slave_id = true,
862 .verify = NULL,
863 .wrapper = mlx4_SW2HW_SRQ_wrapper
864 },
865 {
866 .opcode = MLX4_CMD_HW2SW_SRQ,
867 .has_inbox = false,
868 .has_outbox = false,
869 .out_is_imm = false,
870 .encode_slave_id = false,
871 .verify = NULL,
872 .wrapper = mlx4_HW2SW_SRQ_wrapper
873 },
874 {
875 .opcode = MLX4_CMD_QUERY_SRQ,
876 .has_inbox = false,
877 .has_outbox = true,
878 .out_is_imm = false,
879 .encode_slave_id = false,
880 .verify = NULL,
881 .wrapper = mlx4_QUERY_SRQ_wrapper
882 },
883 {
884 .opcode = MLX4_CMD_ARM_SRQ,
885 .has_inbox = false,
886 .has_outbox = false,
887 .out_is_imm = false,
888 .encode_slave_id = false,
889 .verify = NULL,
890 .wrapper = mlx4_ARM_SRQ_wrapper
891 },
892 {
893 .opcode = MLX4_CMD_RST2INIT_QP,
894 .has_inbox = true,
895 .has_outbox = false,
896 .out_is_imm = false,
897 .encode_slave_id = true,
898 .verify = NULL,
899 .wrapper = mlx4_RST2INIT_QP_wrapper
900 },
901 {
902 .opcode = MLX4_CMD_INIT2INIT_QP,
903 .has_inbox = true,
904 .has_outbox = false,
905 .out_is_imm = false,
906 .encode_slave_id = false,
907 .verify = NULL,
908 .wrapper = mlx4_GEN_QP_wrapper
909 },
910 {
911 .opcode = MLX4_CMD_INIT2RTR_QP,
912 .has_inbox = true,
913 .has_outbox = false,
914 .out_is_imm = false,
915 .encode_slave_id = false,
916 .verify = NULL,
917 .wrapper = mlx4_INIT2RTR_QP_wrapper
918 },
919 {
920 .opcode = MLX4_CMD_RTR2RTS_QP,
921 .has_inbox = true,
922 .has_outbox = false,
923 .out_is_imm = false,
924 .encode_slave_id = false,
925 .verify = NULL,
926 .wrapper = mlx4_GEN_QP_wrapper
927 },
928 {
929 .opcode = MLX4_CMD_RTS2RTS_QP,
930 .has_inbox = true,
931 .has_outbox = false,
932 .out_is_imm = false,
933 .encode_slave_id = false,
934 .verify = NULL,
935 .wrapper = mlx4_GEN_QP_wrapper
936 },
937 {
938 .opcode = MLX4_CMD_SQERR2RTS_QP,
939 .has_inbox = true,
940 .has_outbox = false,
941 .out_is_imm = false,
942 .encode_slave_id = false,
943 .verify = NULL,
944 .wrapper = mlx4_GEN_QP_wrapper
945 },
946 {
947 .opcode = MLX4_CMD_2ERR_QP,
948 .has_inbox = false,
949 .has_outbox = false,
950 .out_is_imm = false,
951 .encode_slave_id = false,
952 .verify = NULL,
953 .wrapper = mlx4_GEN_QP_wrapper
954 },
955 {
956 .opcode = MLX4_CMD_RTS2SQD_QP,
957 .has_inbox = false,
958 .has_outbox = false,
959 .out_is_imm = false,
960 .encode_slave_id = false,
961 .verify = NULL,
962 .wrapper = mlx4_GEN_QP_wrapper
963 },
964 {
965 .opcode = MLX4_CMD_SQD2SQD_QP,
966 .has_inbox = true,
967 .has_outbox = false,
968 .out_is_imm = false,
969 .encode_slave_id = false,
970 .verify = NULL,
971 .wrapper = mlx4_GEN_QP_wrapper
972 },
973 {
974 .opcode = MLX4_CMD_SQD2RTS_QP,
975 .has_inbox = true,
976 .has_outbox = false,
977 .out_is_imm = false,
978 .encode_slave_id = false,
979 .verify = NULL,
980 .wrapper = mlx4_GEN_QP_wrapper
981 },
982 {
983 .opcode = MLX4_CMD_2RST_QP,
984 .has_inbox = false,
985 .has_outbox = false,
986 .out_is_imm = false,
987 .encode_slave_id = false,
988 .verify = NULL,
989 .wrapper = mlx4_2RST_QP_wrapper
990 },
991 {
992 .opcode = MLX4_CMD_QUERY_QP,
993 .has_inbox = false,
994 .has_outbox = true,
995 .out_is_imm = false,
996 .encode_slave_id = false,
997 .verify = NULL,
998 .wrapper = mlx4_GEN_QP_wrapper
999 },
1000 {
1001 .opcode = MLX4_CMD_SUSPEND_QP,
1002 .has_inbox = false,
1003 .has_outbox = false,
1004 .out_is_imm = false,
1005 .encode_slave_id = false,
1006 .verify = NULL,
1007 .wrapper = mlx4_GEN_QP_wrapper
1008 },
1009 {
1010 .opcode = MLX4_CMD_UNSUSPEND_QP,
1011 .has_inbox = false,
1012 .has_outbox = false,
1013 .out_is_imm = false,
1014 .encode_slave_id = false,
1015 .verify = NULL,
1016 .wrapper = mlx4_GEN_QP_wrapper
1017 },
1018 {
1019 .opcode = MLX4_CMD_QUERY_IF_STAT,
1020 .has_inbox = false,
1021 .has_outbox = true,
1022 .out_is_imm = false,
1023 .encode_slave_id = false,
1024 .verify = NULL,
1025 .wrapper = mlx4_QUERY_IF_STAT_wrapper
1026 },
1027 /* Native multicast commands are not available for guests */
1028 {
1029 .opcode = MLX4_CMD_QP_ATTACH,
1030 .has_inbox = true,
1031 .has_outbox = false,
1032 .out_is_imm = false,
1033 .encode_slave_id = false,
1034 .verify = NULL,
1035 .wrapper = mlx4_QP_ATTACH_wrapper
1036 },
1037 {
1038 .opcode = MLX4_CMD_PROMISC,
1039 .has_inbox = false,
1040 .has_outbox = false,
1041 .out_is_imm = false,
1042 .encode_slave_id = false,
1043 .verify = NULL,
1044 .wrapper = mlx4_PROMISC_wrapper
1045 },
1046 /* Ethernet specific commands */
1047 {
1048 .opcode = MLX4_CMD_SET_VLAN_FLTR,
1049 .has_inbox = true,
1050 .has_outbox = false,
1051 .out_is_imm = false,
1052 .encode_slave_id = false,
1053 .verify = NULL,
1054 .wrapper = mlx4_SET_VLAN_FLTR_wrapper
1055 },
1056 {
1057 .opcode = MLX4_CMD_SET_MCAST_FLTR,
1058 .has_inbox = false,
1059 .has_outbox = false,
1060 .out_is_imm = false,
1061 .encode_slave_id = false,
1062 .verify = NULL,
1063 .wrapper = mlx4_SET_MCAST_FLTR_wrapper
1064 },
1065 {
1066 .opcode = MLX4_CMD_DUMP_ETH_STATS,
1067 .has_inbox = false,
1068 .has_outbox = true,
1069 .out_is_imm = false,
1070 .encode_slave_id = false,
1071 .verify = NULL,
1072 .wrapper = mlx4_DUMP_ETH_STATS_wrapper
1073 },
1074 {
1075 .opcode = MLX4_CMD_INFORM_FLR_DONE,
1076 .has_inbox = false,
1077 .has_outbox = false,
1078 .out_is_imm = false,
1079 .encode_slave_id = false,
1080 .verify = NULL,
1081 .wrapper = NULL
1082 },
1083 };
1084
1085 static int mlx4_master_process_vhcr(struct mlx4_dev *dev, int slave,
1086 struct mlx4_vhcr_cmd *in_vhcr)
1087 {
1088 struct mlx4_priv *priv = mlx4_priv(dev);
1089 struct mlx4_cmd_info *cmd = NULL;
1090 struct mlx4_vhcr_cmd *vhcr_cmd = in_vhcr ? in_vhcr : priv->mfunc.vhcr;
1091 struct mlx4_vhcr *vhcr;
1092 struct mlx4_cmd_mailbox *inbox = NULL;
1093 struct mlx4_cmd_mailbox *outbox = NULL;
1094 u64 in_param;
1095 u64 out_param;
1096 int ret = 0;
1097 int i;
1098 int err = 0;
1099
1100 /* Create sw representation of Virtual HCR */
1101 vhcr = kzalloc(sizeof(struct mlx4_vhcr), GFP_KERNEL);
1102 if (!vhcr)
1103 return -ENOMEM;
1104
1105 /* DMA in the vHCR */
1106 if (!in_vhcr) {
1107 ret = mlx4_ACCESS_MEM(dev, priv->mfunc.vhcr_dma, slave,
1108 priv->mfunc.master.slave_state[slave].vhcr_dma,
1109 ALIGN(sizeof(struct mlx4_vhcr_cmd),
1110 MLX4_ACCESS_MEM_ALIGN), 1);
1111 if (ret) {
1112 mlx4_err(dev, "%s:Failed reading vhcr"
1113 "ret: 0x%x\n", __func__, ret);
1114 kfree(vhcr);
1115 return ret;
1116 }
1117 }
1118
1119 /* Fill SW VHCR fields */
1120 vhcr->in_param = be64_to_cpu(vhcr_cmd->in_param);
1121 vhcr->out_param = be64_to_cpu(vhcr_cmd->out_param);
1122 vhcr->in_modifier = be32_to_cpu(vhcr_cmd->in_modifier);
1123 vhcr->token = be16_to_cpu(vhcr_cmd->token);
1124 vhcr->op = be16_to_cpu(vhcr_cmd->opcode) & 0xfff;
1125 vhcr->op_modifier = (u8) (be16_to_cpu(vhcr_cmd->opcode) >> 12);
1126 vhcr->e_bit = vhcr_cmd->flags & (1 << 6);
1127
1128 /* Lookup command */
1129 for (i = 0; i < ARRAY_SIZE(cmd_info); ++i) {
1130 if (vhcr->op == cmd_info[i].opcode) {
1131 cmd = &cmd_info[i];
1132 break;
1133 }
1134 }
1135 if (!cmd) {
1136 mlx4_err(dev, "Unknown command:0x%x accepted from slave:%d\n",
1137 vhcr->op, slave);
1138 vhcr_cmd->status = CMD_STAT_BAD_PARAM;
1139 goto out_status;
1140 }
1141
1142 /* Read inbox */
1143 if (cmd->has_inbox) {
1144 vhcr->in_param &= INBOX_MASK;
1145 inbox = mlx4_alloc_cmd_mailbox(dev);
1146 if (IS_ERR(inbox)) {
1147 vhcr_cmd->status = CMD_STAT_BAD_SIZE;
1148 inbox = NULL;
1149 goto out_status;
1150 }
1151
1152 if (mlx4_ACCESS_MEM(dev, inbox->dma, slave,
1153 vhcr->in_param,
1154 MLX4_MAILBOX_SIZE, 1)) {
1155 mlx4_err(dev, "%s: Failed reading inbox (cmd:0x%x)\n",
1156 __func__, cmd->opcode);
1157 vhcr_cmd->status = CMD_STAT_INTERNAL_ERR;
1158 goto out_status;
1159 }
1160 }
1161
1162 /* Apply permission and bound checks if applicable */
1163 if (cmd->verify && cmd->verify(dev, slave, vhcr, inbox)) {
1164 mlx4_warn(dev, "Command:0x%x from slave: %d failed protection "
1165 "checks for resource_id:%d\n", vhcr->op, slave,
1166 vhcr->in_modifier);
1167 vhcr_cmd->status = CMD_STAT_BAD_OP;
1168 goto out_status;
1169 }
1170
1171 /* Allocate outbox */
1172 if (cmd->has_outbox) {
1173 outbox = mlx4_alloc_cmd_mailbox(dev);
1174 if (IS_ERR(outbox)) {
1175 vhcr_cmd->status = CMD_STAT_BAD_SIZE;
1176 outbox = NULL;
1177 goto out_status;
1178 }
1179 }
1180
1181 /* Execute the command! */
1182 if (cmd->wrapper) {
1183 err = cmd->wrapper(dev, slave, vhcr, inbox, outbox,
1184 cmd);
1185 if (cmd->out_is_imm)
1186 vhcr_cmd->out_param = cpu_to_be64(vhcr->out_param);
1187 } else {
1188 in_param = cmd->has_inbox ? (u64) inbox->dma :
1189 vhcr->in_param;
1190 out_param = cmd->has_outbox ? (u64) outbox->dma :
1191 vhcr->out_param;
1192 err = __mlx4_cmd(dev, in_param, &out_param,
1193 cmd->out_is_imm, vhcr->in_modifier,
1194 vhcr->op_modifier, vhcr->op,
1195 MLX4_CMD_TIME_CLASS_A,
1196 MLX4_CMD_NATIVE);
1197
1198 if (cmd->out_is_imm) {
1199 vhcr->out_param = out_param;
1200 vhcr_cmd->out_param = cpu_to_be64(vhcr->out_param);
1201 }
1202 }
1203
1204 if (err) {
1205 mlx4_warn(dev, "vhcr command:0x%x slave:%d failed with"
1206 " error:%d, status %d\n",
1207 vhcr->op, slave, vhcr->errno, err);
1208 vhcr_cmd->status = mlx4_errno_to_status(err);
1209 goto out_status;
1210 }
1211
1212
1213 /* Write outbox if command completed successfully */
1214 if (cmd->has_outbox && !vhcr_cmd->status) {
1215 ret = mlx4_ACCESS_MEM(dev, outbox->dma, slave,
1216 vhcr->out_param,
1217 MLX4_MAILBOX_SIZE, MLX4_CMD_WRAPPED);
1218 if (ret) {
1219 /* If we failed to write back the outbox after the
1220 *command was successfully executed, we must fail this
1221 * slave, as it is now in undefined state */
1222 mlx4_err(dev, "%s:Failed writing outbox\n", __func__);
1223 goto out;
1224 }
1225 }
1226
1227 out_status:
1228 /* DMA back vhcr result */
1229 if (!in_vhcr) {
1230 ret = mlx4_ACCESS_MEM(dev, priv->mfunc.vhcr_dma, slave,
1231 priv->mfunc.master.slave_state[slave].vhcr_dma,
1232 ALIGN(sizeof(struct mlx4_vhcr),
1233 MLX4_ACCESS_MEM_ALIGN),
1234 MLX4_CMD_WRAPPED);
1235 if (ret)
1236 mlx4_err(dev, "%s:Failed writing vhcr result\n",
1237 __func__);
1238 else if (vhcr->e_bit &&
1239 mlx4_GEN_EQE(dev, slave, &priv->mfunc.master.cmd_eqe))
1240 mlx4_warn(dev, "Failed to generate command completion "
1241 "eqe for slave %d\n", slave);
1242 }
1243
1244 out:
1245 kfree(vhcr);
1246 mlx4_free_cmd_mailbox(dev, inbox);
1247 mlx4_free_cmd_mailbox(dev, outbox);
1248 return ret;
1249 }
1250
1251 static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
1252 u16 param, u8 toggle)
1253 {
1254 struct mlx4_priv *priv = mlx4_priv(dev);
1255 struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state;
1256 u32 reply;
1257 u32 slave_status = 0;
1258 u8 is_going_down = 0;
1259 int i;
1260
1261 slave_state[slave].comm_toggle ^= 1;
1262 reply = (u32) slave_state[slave].comm_toggle << 31;
1263 if (toggle != slave_state[slave].comm_toggle) {
1264 mlx4_warn(dev, "Incorrect toggle %d from slave %d. *** MASTER"
1265 "STATE COMPROMISIED ***\n", toggle, slave);
1266 goto reset_slave;
1267 }
1268 if (cmd == MLX4_COMM_CMD_RESET) {
1269 mlx4_warn(dev, "Received reset from slave:%d\n", slave);
1270 slave_state[slave].active = false;
1271 for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i) {
1272 slave_state[slave].event_eq[i].eqn = -1;
1273 slave_state[slave].event_eq[i].token = 0;
1274 }
1275 /*check if we are in the middle of FLR process,
1276 if so return "retry" status to the slave*/
1277 if (MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd) {
1278 slave_status = MLX4_DELAY_RESET_SLAVE;
1279 goto inform_slave_state;
1280 }
1281
1282 /* write the version in the event field */
1283 reply |= mlx4_comm_get_version();
1284
1285 goto reset_slave;
1286 }
1287 /*command from slave in the middle of FLR*/
1288 if (cmd != MLX4_COMM_CMD_RESET &&
1289 MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd) {
1290 mlx4_warn(dev, "slave:%d is Trying to run cmd(0x%x) "
1291 "in the middle of FLR\n", slave, cmd);
1292 return;
1293 }
1294
1295 switch (cmd) {
1296 case MLX4_COMM_CMD_VHCR0:
1297 if (slave_state[slave].last_cmd != MLX4_COMM_CMD_RESET)
1298 goto reset_slave;
1299 slave_state[slave].vhcr_dma = ((u64) param) << 48;
1300 priv->mfunc.master.slave_state[slave].cookie = 0;
1301 mutex_init(&priv->mfunc.master.gen_eqe_mutex[slave]);
1302 break;
1303 case MLX4_COMM_CMD_VHCR1:
1304 if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR0)
1305 goto reset_slave;
1306 slave_state[slave].vhcr_dma |= ((u64) param) << 32;
1307 break;
1308 case MLX4_COMM_CMD_VHCR2:
1309 if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR1)
1310 goto reset_slave;
1311 slave_state[slave].vhcr_dma |= ((u64) param) << 16;
1312 break;
1313 case MLX4_COMM_CMD_VHCR_EN:
1314 if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR2)
1315 goto reset_slave;
1316 slave_state[slave].vhcr_dma |= param;
1317 slave_state[slave].active = true;
1318 break;
1319 case MLX4_COMM_CMD_VHCR_POST:
1320 if ((slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_EN) &&
1321 (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_POST))
1322 goto reset_slave;
1323 down(&priv->cmd.slave_sem);
1324 if (mlx4_master_process_vhcr(dev, slave, NULL)) {
1325 mlx4_err(dev, "Failed processing vhcr for slave:%d,"
1326 " resetting slave.\n", slave);
1327 up(&priv->cmd.slave_sem);
1328 goto reset_slave;
1329 }
1330 up(&priv->cmd.slave_sem);
1331 break;
1332 default:
1333 mlx4_warn(dev, "Bad comm cmd:%d from slave:%d\n", cmd, slave);
1334 goto reset_slave;
1335 }
1336 spin_lock(&priv->mfunc.master.slave_state_lock);
1337 if (!slave_state[slave].is_slave_going_down)
1338 slave_state[slave].last_cmd = cmd;
1339 else
1340 is_going_down = 1;
1341 spin_unlock(&priv->mfunc.master.slave_state_lock);
1342 if (is_going_down) {
1343 mlx4_warn(dev, "Slave is going down aborting command(%d)"
1344 " executing from slave:%d\n",
1345 cmd, slave);
1346 return;
1347 }
1348 __raw_writel((__force u32) cpu_to_be32(reply),
1349 &priv->mfunc.comm[slave].slave_read);
1350 mmiowb();
1351
1352 return;
1353
1354 reset_slave:
1355 /* cleanup any slave resources */
1356 mlx4_delete_all_resources_for_slave(dev, slave);
1357 spin_lock(&priv->mfunc.master.slave_state_lock);
1358 if (!slave_state[slave].is_slave_going_down)
1359 slave_state[slave].last_cmd = MLX4_COMM_CMD_RESET;
1360 spin_unlock(&priv->mfunc.master.slave_state_lock);
1361 /*with slave in the middle of flr, no need to clean resources again.*/
1362 inform_slave_state:
1363 memset(&slave_state[slave].event_eq, 0,
1364 sizeof(struct mlx4_slave_event_eq_info));
1365 __raw_writel((__force u32) cpu_to_be32(reply),
1366 &priv->mfunc.comm[slave].slave_read);
1367 wmb();
1368 }
1369
1370 /* master command processing */
1371 void mlx4_master_comm_channel(struct work_struct *work)
1372 {
1373 struct mlx4_mfunc_master_ctx *master =
1374 container_of(work,
1375 struct mlx4_mfunc_master_ctx,
1376 comm_work);
1377 struct mlx4_mfunc *mfunc =
1378 container_of(master, struct mlx4_mfunc, master);
1379 struct mlx4_priv *priv =
1380 container_of(mfunc, struct mlx4_priv, mfunc);
1381 struct mlx4_dev *dev = &priv->dev;
1382 __be32 *bit_vec;
1383 u32 comm_cmd;
1384 u32 vec;
1385 int i, j, slave;
1386 int toggle;
1387 int served = 0;
1388 int reported = 0;
1389 u32 slt;
1390
1391 bit_vec = master->comm_arm_bit_vector;
1392 for (i = 0; i < COMM_CHANNEL_BIT_ARRAY_SIZE; i++) {
1393 vec = be32_to_cpu(bit_vec[i]);
1394 for (j = 0; j < 32; j++) {
1395 if (!(vec & (1 << j)))
1396 continue;
1397 ++reported;
1398 slave = (i * 32) + j;
1399 comm_cmd = swab32(readl(
1400 &mfunc->comm[slave].slave_write));
1401 slt = swab32(readl(&mfunc->comm[slave].slave_read))
1402 >> 31;
1403 toggle = comm_cmd >> 31;
1404 if (toggle != slt) {
1405 if (master->slave_state[slave].comm_toggle
1406 != slt) {
1407 printk(KERN_INFO "slave %d out of sync."
1408 " read toggle %d, state toggle %d. "
1409 "Resynching.\n", slave, slt,
1410 master->slave_state[slave].comm_toggle);
1411 master->slave_state[slave].comm_toggle =
1412 slt;
1413 }
1414 mlx4_master_do_cmd(dev, slave,
1415 comm_cmd >> 16 & 0xff,
1416 comm_cmd & 0xffff, toggle);
1417 ++served;
1418 }
1419 }
1420 }
1421
1422 if (reported && reported != served)
1423 mlx4_warn(dev, "Got command event with bitmask from %d slaves"
1424 " but %d were served\n",
1425 reported, served);
1426
1427 if (mlx4_ARM_COMM_CHANNEL(dev))
1428 mlx4_warn(dev, "Failed to arm comm channel events\n");
1429 }
1430
1431 static int sync_toggles(struct mlx4_dev *dev)
1432 {
1433 struct mlx4_priv *priv = mlx4_priv(dev);
1434 int wr_toggle;
1435 int rd_toggle;
1436 unsigned long end;
1437
1438 wr_toggle = swab32(readl(&priv->mfunc.comm->slave_write)) >> 31;
1439 end = jiffies + msecs_to_jiffies(5000);
1440
1441 while (time_before(jiffies, end)) {
1442 rd_toggle = swab32(readl(&priv->mfunc.comm->slave_read)) >> 31;
1443 if (rd_toggle == wr_toggle) {
1444 priv->cmd.comm_toggle = rd_toggle;
1445 return 0;
1446 }
1447
1448 cond_resched();
1449 }
1450
1451 /*
1452 * we could reach here if for example the previous VM using this
1453 * function misbehaved and left the channel with unsynced state. We
1454 * should fix this here and give this VM a chance to use a properly
1455 * synced channel
1456 */
1457 mlx4_warn(dev, "recovering from previously mis-behaved VM\n");
1458 __raw_writel((__force u32) 0, &priv->mfunc.comm->slave_read);
1459 __raw_writel((__force u32) 0, &priv->mfunc.comm->slave_write);
1460 priv->cmd.comm_toggle = 0;
1461
1462 return 0;
1463 }
1464
1465 int mlx4_multi_func_init(struct mlx4_dev *dev)
1466 {
1467 struct mlx4_priv *priv = mlx4_priv(dev);
1468 struct mlx4_slave_state *s_state;
1469 int i, j, err, port;
1470
1471 priv->mfunc.vhcr = dma_alloc_coherent(&(dev->pdev->dev), PAGE_SIZE,
1472 &priv->mfunc.vhcr_dma,
1473 GFP_KERNEL);
1474 if (!priv->mfunc.vhcr) {
1475 mlx4_err(dev, "Couldn't allocate vhcr.\n");
1476 return -ENOMEM;
1477 }
1478
1479 if (mlx4_is_master(dev))
1480 priv->mfunc.comm =
1481 ioremap(pci_resource_start(dev->pdev, priv->fw.comm_bar) +
1482 priv->fw.comm_base, MLX4_COMM_PAGESIZE);
1483 else
1484 priv->mfunc.comm =
1485 ioremap(pci_resource_start(dev->pdev, 2) +
1486 MLX4_SLAVE_COMM_BASE, MLX4_COMM_PAGESIZE);
1487 if (!priv->mfunc.comm) {
1488 mlx4_err(dev, "Couldn't map communication vector.\n");
1489 goto err_vhcr;
1490 }
1491
1492 if (mlx4_is_master(dev)) {
1493 priv->mfunc.master.slave_state =
1494 kzalloc(dev->num_slaves *
1495 sizeof(struct mlx4_slave_state), GFP_KERNEL);
1496 if (!priv->mfunc.master.slave_state)
1497 goto err_comm;
1498
1499 for (i = 0; i < dev->num_slaves; ++i) {
1500 s_state = &priv->mfunc.master.slave_state[i];
1501 s_state->last_cmd = MLX4_COMM_CMD_RESET;
1502 for (j = 0; j < MLX4_EVENT_TYPES_NUM; ++j)
1503 s_state->event_eq[j].eqn = -1;
1504 __raw_writel((__force u32) 0,
1505 &priv->mfunc.comm[i].slave_write);
1506 __raw_writel((__force u32) 0,
1507 &priv->mfunc.comm[i].slave_read);
1508 mmiowb();
1509 for (port = 1; port <= MLX4_MAX_PORTS; port++) {
1510 s_state->vlan_filter[port] =
1511 kzalloc(sizeof(struct mlx4_vlan_fltr),
1512 GFP_KERNEL);
1513 if (!s_state->vlan_filter[port]) {
1514 if (--port)
1515 kfree(s_state->vlan_filter[port]);
1516 goto err_slaves;
1517 }
1518 INIT_LIST_HEAD(&s_state->mcast_filters[port]);
1519 }
1520 spin_lock_init(&s_state->lock);
1521 }
1522
1523 memset(&priv->mfunc.master.cmd_eqe, 0, sizeof(struct mlx4_eqe));
1524 priv->mfunc.master.cmd_eqe.type = MLX4_EVENT_TYPE_CMD;
1525 INIT_WORK(&priv->mfunc.master.comm_work,
1526 mlx4_master_comm_channel);
1527 INIT_WORK(&priv->mfunc.master.slave_event_work,
1528 mlx4_gen_slave_eqe);
1529 INIT_WORK(&priv->mfunc.master.slave_flr_event_work,
1530 mlx4_master_handle_slave_flr);
1531 spin_lock_init(&priv->mfunc.master.slave_state_lock);
1532 priv->mfunc.master.comm_wq =
1533 create_singlethread_workqueue("mlx4_comm");
1534 if (!priv->mfunc.master.comm_wq)
1535 goto err_slaves;
1536
1537 if (mlx4_init_resource_tracker(dev))
1538 goto err_thread;
1539
1540 sema_init(&priv->cmd.slave_sem, 1);
1541 err = mlx4_ARM_COMM_CHANNEL(dev);
1542 if (err) {
1543 mlx4_err(dev, " Failed to arm comm channel eq: %x\n",
1544 err);
1545 goto err_resource;
1546 }
1547
1548 } else {
1549 err = sync_toggles(dev);
1550 if (err) {
1551 mlx4_err(dev, "Couldn't sync toggles\n");
1552 goto err_comm;
1553 }
1554
1555 sema_init(&priv->cmd.slave_sem, 1);
1556 }
1557 return 0;
1558
1559 err_resource:
1560 mlx4_free_resource_tracker(dev);
1561 err_thread:
1562 flush_workqueue(priv->mfunc.master.comm_wq);
1563 destroy_workqueue(priv->mfunc.master.comm_wq);
1564 err_slaves:
1565 while (--i) {
1566 for (port = 1; port <= MLX4_MAX_PORTS; port++)
1567 kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
1568 }
1569 kfree(priv->mfunc.master.slave_state);
1570 err_comm:
1571 iounmap(priv->mfunc.comm);
1572 err_vhcr:
1573 dma_free_coherent(&(dev->pdev->dev), PAGE_SIZE,
1574 priv->mfunc.vhcr,
1575 priv->mfunc.vhcr_dma);
1576 priv->mfunc.vhcr = NULL;
1577 return -ENOMEM;
1578 }
1579
1580 int mlx4_cmd_init(struct mlx4_dev *dev)
1581 {
1582 struct mlx4_priv *priv = mlx4_priv(dev);
1583
1584 mutex_init(&priv->cmd.hcr_mutex);
1585 sema_init(&priv->cmd.poll_sem, 1);
1586 priv->cmd.use_events = 0;
1587 priv->cmd.toggle = 1;
1588
1589 priv->cmd.hcr = NULL;
1590 priv->mfunc.vhcr = NULL;
1591
1592 if (!mlx4_is_slave(dev)) {
1593 priv->cmd.hcr = ioremap(pci_resource_start(dev->pdev, 0) +
1594 MLX4_HCR_BASE, MLX4_HCR_SIZE);
1595 if (!priv->cmd.hcr) {
1596 mlx4_err(dev, "Couldn't map command register.\n");
1597 return -ENOMEM;
1598 }
1599 }
1600
1601 priv->cmd.pool = pci_pool_create("mlx4_cmd", dev->pdev,
1602 MLX4_MAILBOX_SIZE,
1603 MLX4_MAILBOX_SIZE, 0);
1604 if (!priv->cmd.pool)
1605 goto err_hcr;
1606
1607 return 0;
1608
1609 err_hcr:
1610 if (!mlx4_is_slave(dev))
1611 iounmap(priv->cmd.hcr);
1612 return -ENOMEM;
1613 }
1614
1615 void mlx4_multi_func_cleanup(struct mlx4_dev *dev)
1616 {
1617 struct mlx4_priv *priv = mlx4_priv(dev);
1618 int i, port;
1619
1620 if (mlx4_is_master(dev)) {
1621 flush_workqueue(priv->mfunc.master.comm_wq);
1622 destroy_workqueue(priv->mfunc.master.comm_wq);
1623 for (i = 0; i < dev->num_slaves; i++) {
1624 for (port = 1; port <= MLX4_MAX_PORTS; port++)
1625 kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
1626 }
1627 kfree(priv->mfunc.master.slave_state);
1628 }
1629
1630 iounmap(priv->mfunc.comm);
1631 dma_free_coherent(&(dev->pdev->dev), PAGE_SIZE,
1632 priv->mfunc.vhcr, priv->mfunc.vhcr_dma);
1633 priv->mfunc.vhcr = NULL;
1634 }
1635
1636 void mlx4_cmd_cleanup(struct mlx4_dev *dev)
1637 {
1638 struct mlx4_priv *priv = mlx4_priv(dev);
1639
1640 pci_pool_destroy(priv->cmd.pool);
1641
1642 if (!mlx4_is_slave(dev))
1643 iounmap(priv->cmd.hcr);
1644 }
1645
1646 /*
1647 * Switch to using events to issue FW commands (can only be called
1648 * after event queue for command events has been initialized).
1649 */
1650 int mlx4_cmd_use_events(struct mlx4_dev *dev)
1651 {
1652 struct mlx4_priv *priv = mlx4_priv(dev);
1653 int i;
1654 int err = 0;
1655
1656 priv->cmd.context = kmalloc(priv->cmd.max_cmds *
1657 sizeof (struct mlx4_cmd_context),
1658 GFP_KERNEL);
1659 if (!priv->cmd.context)
1660 return -ENOMEM;
1661
1662 for (i = 0; i < priv->cmd.max_cmds; ++i) {
1663 priv->cmd.context[i].token = i;
1664 priv->cmd.context[i].next = i + 1;
1665 }
1666
1667 priv->cmd.context[priv->cmd.max_cmds - 1].next = -1;
1668 priv->cmd.free_head = 0;
1669
1670 sema_init(&priv->cmd.event_sem, priv->cmd.max_cmds);
1671 spin_lock_init(&priv->cmd.context_lock);
1672
1673 for (priv->cmd.token_mask = 1;
1674 priv->cmd.token_mask < priv->cmd.max_cmds;
1675 priv->cmd.token_mask <<= 1)
1676 ; /* nothing */
1677 --priv->cmd.token_mask;
1678
1679 down(&priv->cmd.poll_sem);
1680 priv->cmd.use_events = 1;
1681
1682 return err;
1683 }
1684
1685 /*
1686 * Switch back to polling (used when shutting down the device)
1687 */
1688 void mlx4_cmd_use_polling(struct mlx4_dev *dev)
1689 {
1690 struct mlx4_priv *priv = mlx4_priv(dev);
1691 int i;
1692
1693 priv->cmd.use_events = 0;
1694
1695 for (i = 0; i < priv->cmd.max_cmds; ++i)
1696 down(&priv->cmd.event_sem);
1697
1698 kfree(priv->cmd.context);
1699
1700 up(&priv->cmd.poll_sem);
1701 }
1702
1703 struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev)
1704 {
1705 struct mlx4_cmd_mailbox *mailbox;
1706
1707 mailbox = kmalloc(sizeof *mailbox, GFP_KERNEL);
1708 if (!mailbox)
1709 return ERR_PTR(-ENOMEM);
1710
1711 mailbox->buf = pci_pool_alloc(mlx4_priv(dev)->cmd.pool, GFP_KERNEL,
1712 &mailbox->dma);
1713 if (!mailbox->buf) {
1714 kfree(mailbox);
1715 return ERR_PTR(-ENOMEM);
1716 }
1717
1718 return mailbox;
1719 }
1720 EXPORT_SYMBOL_GPL(mlx4_alloc_cmd_mailbox);
1721
1722 void mlx4_free_cmd_mailbox(struct mlx4_dev *dev,
1723 struct mlx4_cmd_mailbox *mailbox)
1724 {
1725 if (!mailbox)
1726 return;
1727
1728 pci_pool_free(mlx4_priv(dev)->cmd.pool, mailbox->buf, mailbox->dma);
1729 kfree(mailbox);
1730 }
1731 EXPORT_SYMBOL_GPL(mlx4_free_cmd_mailbox);
1732
1733 u32 mlx4_comm_get_version(void)
1734 {
1735 return ((u32) CMD_CHAN_IF_REV << 8) | (u32) CMD_CHAN_VER;
1736 }
Linux kernel - Deliverables
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