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
mlx4_status_to_errno(u8 status)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
mlx4_errno_to_status(int errno)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
comm_pending(struct mlx4_dev * dev)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
mlx4_comm_cmd_post(struct mlx4_dev * dev,u8 cmd,u16 param)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
mlx4_comm_cmd_poll(struct mlx4_dev * dev,u8 cmd,u16 param,unsigned long timeout)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
mlx4_comm_cmd_wait(struct mlx4_dev * dev,u8 op,u16 param,unsigned long timeout)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 int err = 0;
243
244 down(&cmd->event_sem);
245
246 spin_lock(&cmd->context_lock);
247 BUG_ON(cmd->free_head < 0);
248 context = &cmd->context[cmd->free_head];
249 context->token += cmd->token_mask + 1;
250 cmd->free_head = context->next;
251 spin_unlock(&cmd->context_lock);
252
253 init_completion(&context->done);
254
255 mlx4_comm_cmd_post(dev, op, param);
256
257 if (!wait_for_completion_timeout(&context->done,
258 msecs_to_jiffies(timeout))) {
259 err = -EBUSY;
260 goto out;
261 }
262
263 err = context->result;
264 if (err && context->fw_status != CMD_STAT_MULTI_FUNC_REQ) {
265 mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
266 op, context->fw_status);
267 goto out;
268 }
269
270 out:
271 spin_lock(&cmd->context_lock);
272 context->next = cmd->free_head;
273 cmd->free_head = context - cmd->context;
274 spin_unlock(&cmd->context_lock);
275
276 up(&cmd->event_sem);
277 return err;
278 }
279
mlx4_comm_cmd(struct mlx4_dev * dev,u8 cmd,u16 param,unsigned long timeout)280 int mlx4_comm_cmd(struct mlx4_dev *dev, u8 cmd, u16 param,
281 unsigned long timeout)
282 {
283 if (mlx4_priv(dev)->cmd.use_events)
284 return mlx4_comm_cmd_wait(dev, cmd, param, timeout);
285 return mlx4_comm_cmd_poll(dev, cmd, param, timeout);
286 }
287
cmd_pending(struct mlx4_dev * dev)288 static int cmd_pending(struct mlx4_dev *dev)
289 {
290 u32 status = readl(mlx4_priv(dev)->cmd.hcr + HCR_STATUS_OFFSET);
291
292 return (status & swab32(1 << HCR_GO_BIT)) ||
293 (mlx4_priv(dev)->cmd.toggle ==
294 !!(status & swab32(1 << HCR_T_BIT)));
295 }
296
mlx4_cmd_post(struct mlx4_dev * dev,u64 in_param,u64 out_param,u32 in_modifier,u8 op_modifier,u16 op,u16 token,int event)297 static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param,
298 u32 in_modifier, u8 op_modifier, u16 op, u16 token,
299 int event)
300 {
301 struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
302 u32 __iomem *hcr = cmd->hcr;
303 int ret = -EAGAIN;
304 unsigned long end;
305
306 mutex_lock(&cmd->hcr_mutex);
307
308 end = jiffies;
309 if (event)
310 end += msecs_to_jiffies(GO_BIT_TIMEOUT_MSECS);
311
312 while (cmd_pending(dev)) {
313 if (time_after_eq(jiffies, end)) {
314 mlx4_err(dev, "%s:cmd_pending failed\n", __func__);
315 goto out;
316 }
317 cond_resched();
318 }
319
320 /*
321 * We use writel (instead of something like memcpy_toio)
322 * because writes of less than 32 bits to the HCR don't work
323 * (and some architectures such as ia64 implement memcpy_toio
324 * in terms of writeb).
325 */
326 __raw_writel((__force u32) cpu_to_be32(in_param >> 32), hcr + 0);
327 __raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful), hcr + 1);
328 __raw_writel((__force u32) cpu_to_be32(in_modifier), hcr + 2);
329 __raw_writel((__force u32) cpu_to_be32(out_param >> 32), hcr + 3);
330 __raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), hcr + 4);
331 __raw_writel((__force u32) cpu_to_be32(token << 16), hcr + 5);
332
333 /* __raw_writel may not order writes. */
334 wmb();
335
336 __raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT) |
337 (cmd->toggle << HCR_T_BIT) |
338 (event ? (1 << HCR_E_BIT) : 0) |
339 (op_modifier << HCR_OPMOD_SHIFT) |
340 op), hcr + 6);
341
342 /*
343 * Make sure that our HCR writes don't get mixed in with
344 * writes from another CPU starting a FW command.
345 */
346 mmiowb();
347
348 cmd->toggle = cmd->toggle ^ 1;
349
350 ret = 0;
351
352 out:
353 mutex_unlock(&cmd->hcr_mutex);
354 return ret;
355 }
356
mlx4_slave_cmd(struct mlx4_dev * dev,u64 in_param,u64 * out_param,int out_is_imm,u32 in_modifier,u8 op_modifier,u16 op,unsigned long timeout)357 static int mlx4_slave_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
358 int out_is_imm, u32 in_modifier, u8 op_modifier,
359 u16 op, unsigned long timeout)
360 {
361 struct mlx4_priv *priv = mlx4_priv(dev);
362 struct mlx4_vhcr_cmd *vhcr = priv->mfunc.vhcr;
363 int ret;
364
365 down(&priv->cmd.slave_sem);
366 vhcr->in_param = cpu_to_be64(in_param);
367 vhcr->out_param = out_param ? cpu_to_be64(*out_param) : 0;
368 vhcr->in_modifier = cpu_to_be32(in_modifier);
369 vhcr->opcode = cpu_to_be16((((u16) op_modifier) << 12) | (op & 0xfff));
370 vhcr->token = cpu_to_be16(CMD_POLL_TOKEN);
371 vhcr->status = 0;
372 vhcr->flags = !!(priv->cmd.use_events) << 6;
373 if (mlx4_is_master(dev)) {
374 ret = mlx4_master_process_vhcr(dev, dev->caps.function, vhcr);
375 if (!ret) {
376 if (out_is_imm) {
377 if (out_param)
378 *out_param =
379 be64_to_cpu(vhcr->out_param);
380 else {
381 mlx4_err(dev, "response expected while"
382 "output mailbox is NULL for "
383 "command 0x%x\n", op);
384 vhcr->status = CMD_STAT_BAD_PARAM;
385 }
386 }
387 ret = mlx4_status_to_errno(vhcr->status);
388 }
389 } else {
390 ret = mlx4_comm_cmd(dev, MLX4_COMM_CMD_VHCR_POST, 0,
391 MLX4_COMM_TIME + timeout);
392 if (!ret) {
393 if (out_is_imm) {
394 if (out_param)
395 *out_param =
396 be64_to_cpu(vhcr->out_param);
397 else {
398 mlx4_err(dev, "response expected while"
399 "output mailbox is NULL for "
400 "command 0x%x\n", op);
401 vhcr->status = CMD_STAT_BAD_PARAM;
402 }
403 }
404 ret = mlx4_status_to_errno(vhcr->status);
405 } else
406 mlx4_err(dev, "failed execution of VHCR_POST command"
407 "opcode 0x%x\n", op);
408 }
409 up(&priv->cmd.slave_sem);
410 return ret;
411 }
412
mlx4_cmd_poll(struct mlx4_dev * dev,u64 in_param,u64 * out_param,int out_is_imm,u32 in_modifier,u8 op_modifier,u16 op,unsigned long timeout)413 static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
414 int out_is_imm, u32 in_modifier, u8 op_modifier,
415 u16 op, unsigned long timeout)
416 {
417 struct mlx4_priv *priv = mlx4_priv(dev);
418 void __iomem *hcr = priv->cmd.hcr;
419 int err = 0;
420 unsigned long end;
421 u32 stat;
422
423 down(&priv->cmd.poll_sem);
424
425 err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
426 in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0);
427 if (err)
428 goto out;
429
430 end = msecs_to_jiffies(timeout) + jiffies;
431 while (cmd_pending(dev) && time_before(jiffies, end))
432 cond_resched();
433
434 if (cmd_pending(dev)) {
435 err = -ETIMEDOUT;
436 goto out;
437 }
438
439 if (out_is_imm)
440 *out_param =
441 (u64) be32_to_cpu((__force __be32)
442 __raw_readl(hcr + HCR_OUT_PARAM_OFFSET)) << 32 |
443 (u64) be32_to_cpu((__force __be32)
444 __raw_readl(hcr + HCR_OUT_PARAM_OFFSET + 4));
445 stat = be32_to_cpu((__force __be32)
446 __raw_readl(hcr + HCR_STATUS_OFFSET)) >> 24;
447 err = mlx4_status_to_errno(stat);
448 if (err)
449 mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
450 op, stat);
451
452 out:
453 up(&priv->cmd.poll_sem);
454 return err;
455 }
456
mlx4_cmd_event(struct mlx4_dev * dev,u16 token,u8 status,u64 out_param)457 void mlx4_cmd_event(struct mlx4_dev *dev, u16 token, u8 status, u64 out_param)
458 {
459 struct mlx4_priv *priv = mlx4_priv(dev);
460 struct mlx4_cmd_context *context =
461 &priv->cmd.context[token & priv->cmd.token_mask];
462
463 /* previously timed out command completing at long last */
464 if (token != context->token)
465 return;
466
467 context->fw_status = status;
468 context->result = mlx4_status_to_errno(status);
469 context->out_param = out_param;
470
471 complete(&context->done);
472 }
473
mlx4_cmd_wait(struct mlx4_dev * dev,u64 in_param,u64 * out_param,int out_is_imm,u32 in_modifier,u8 op_modifier,u16 op,unsigned long timeout)474 static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
475 int out_is_imm, u32 in_modifier, u8 op_modifier,
476 u16 op, unsigned long timeout)
477 {
478 struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
479 struct mlx4_cmd_context *context;
480 int err = 0;
481
482 down(&cmd->event_sem);
483
484 spin_lock(&cmd->context_lock);
485 BUG_ON(cmd->free_head < 0);
486 context = &cmd->context[cmd->free_head];
487 context->token += cmd->token_mask + 1;
488 cmd->free_head = context->next;
489 spin_unlock(&cmd->context_lock);
490
491 init_completion(&context->done);
492
493 mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
494 in_modifier, op_modifier, op, context->token, 1);
495
496 if (!wait_for_completion_timeout(&context->done,
497 msecs_to_jiffies(timeout))) {
498 err = -EBUSY;
499 goto out;
500 }
501
502 err = context->result;
503 if (err) {
504 mlx4_err(dev, "command 0x%x failed: fw status = 0x%x\n",
505 op, context->fw_status);
506 goto out;
507 }
508
509 if (out_is_imm)
510 *out_param = context->out_param;
511
512 out:
513 spin_lock(&cmd->context_lock);
514 context->next = cmd->free_head;
515 cmd->free_head = context - cmd->context;
516 spin_unlock(&cmd->context_lock);
517
518 up(&cmd->event_sem);
519 return err;
520 }
521
__mlx4_cmd(struct mlx4_dev * dev,u64 in_param,u64 * out_param,int out_is_imm,u32 in_modifier,u8 op_modifier,u16 op,unsigned long timeout,int native)522 int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
523 int out_is_imm, u32 in_modifier, u8 op_modifier,
524 u16 op, unsigned long timeout, int native)
525 {
526 if (!mlx4_is_mfunc(dev) || (native && mlx4_is_master(dev))) {
527 if (mlx4_priv(dev)->cmd.use_events)
528 return mlx4_cmd_wait(dev, in_param, out_param,
529 out_is_imm, in_modifier,
530 op_modifier, op, timeout);
531 else
532 return mlx4_cmd_poll(dev, in_param, out_param,
533 out_is_imm, in_modifier,
534 op_modifier, op, timeout);
535 }
536 return mlx4_slave_cmd(dev, in_param, out_param, out_is_imm,
537 in_modifier, op_modifier, op, timeout);
538 }
539 EXPORT_SYMBOL_GPL(__mlx4_cmd);
540
541
mlx4_ARM_COMM_CHANNEL(struct mlx4_dev * dev)542 static int mlx4_ARM_COMM_CHANNEL(struct mlx4_dev *dev)
543 {
544 return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_ARM_COMM_CHANNEL,
545 MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
546 }
547
mlx4_ACCESS_MEM(struct mlx4_dev * dev,u64 master_addr,int slave,u64 slave_addr,int size,int is_read)548 static int mlx4_ACCESS_MEM(struct mlx4_dev *dev, u64 master_addr,
549 int slave, u64 slave_addr,
550 int size, int is_read)
551 {
552 u64 in_param;
553 u64 out_param;
554
555 if ((slave_addr & 0xfff) | (master_addr & 0xfff) |
556 (slave & ~0x7f) | (size & 0xff)) {
557 mlx4_err(dev, "Bad access mem params - slave_addr:0x%llx "
558 "master_addr:0x%llx slave_id:%d size:%d\n",
559 slave_addr, master_addr, slave, size);
560 return -EINVAL;
561 }
562
563 if (is_read) {
564 in_param = (u64) slave | slave_addr;
565 out_param = (u64) dev->caps.function | master_addr;
566 } else {
567 in_param = (u64) dev->caps.function | master_addr;
568 out_param = (u64) slave | slave_addr;
569 }
570
571 return mlx4_cmd_imm(dev, in_param, &out_param, size, 0,
572 MLX4_CMD_ACCESS_MEM,
573 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
574 }
575
mlx4_DMA_wrapper(struct mlx4_dev * dev,int slave,struct mlx4_vhcr * vhcr,struct mlx4_cmd_mailbox * inbox,struct mlx4_cmd_mailbox * outbox,struct mlx4_cmd_info * cmd)576 int mlx4_DMA_wrapper(struct mlx4_dev *dev, int slave,
577 struct mlx4_vhcr *vhcr,
578 struct mlx4_cmd_mailbox *inbox,
579 struct mlx4_cmd_mailbox *outbox,
580 struct mlx4_cmd_info *cmd)
581 {
582 u64 in_param;
583 u64 out_param;
584 int err;
585
586 in_param = cmd->has_inbox ? (u64) inbox->dma : vhcr->in_param;
587 out_param = cmd->has_outbox ? (u64) outbox->dma : vhcr->out_param;
588 if (cmd->encode_slave_id) {
589 in_param &= 0xffffffffffffff00ll;
590 in_param |= slave;
591 }
592
593 err = __mlx4_cmd(dev, in_param, &out_param, cmd->out_is_imm,
594 vhcr->in_modifier, vhcr->op_modifier, vhcr->op,
595 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
596
597 if (cmd->out_is_imm)
598 vhcr->out_param = out_param;
599
600 return err;
601 }
602
603 static struct mlx4_cmd_info cmd_info[] = {
604 {
605 .opcode = MLX4_CMD_QUERY_FW,
606 .has_inbox = false,
607 .has_outbox = true,
608 .out_is_imm = false,
609 .encode_slave_id = false,
610 .verify = NULL,
611 .wrapper = NULL
612 },
613 {
614 .opcode = MLX4_CMD_QUERY_HCA,
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_DEV_CAP,
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_FUNC_CAP,
633 .has_inbox = false,
634 .has_outbox = true,
635 .out_is_imm = false,
636 .encode_slave_id = false,
637 .verify = NULL,
638 .wrapper = mlx4_QUERY_FUNC_CAP_wrapper
639 },
640 {
641 .opcode = MLX4_CMD_QUERY_ADAPTER,
642 .has_inbox = false,
643 .has_outbox = true,
644 .out_is_imm = false,
645 .encode_slave_id = false,
646 .verify = NULL,
647 .wrapper = NULL
648 },
649 {
650 .opcode = MLX4_CMD_INIT_PORT,
651 .has_inbox = false,
652 .has_outbox = false,
653 .out_is_imm = false,
654 .encode_slave_id = false,
655 .verify = NULL,
656 .wrapper = mlx4_INIT_PORT_wrapper
657 },
658 {
659 .opcode = MLX4_CMD_CLOSE_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_CLOSE_PORT_wrapper
666 },
667 {
668 .opcode = MLX4_CMD_QUERY_PORT,
669 .has_inbox = false,
670 .has_outbox = true,
671 .out_is_imm = false,
672 .encode_slave_id = false,
673 .verify = NULL,
674 .wrapper = mlx4_QUERY_PORT_wrapper
675 },
676 {
677 .opcode = MLX4_CMD_SET_PORT,
678 .has_inbox = true,
679 .has_outbox = false,
680 .out_is_imm = false,
681 .encode_slave_id = false,
682 .verify = NULL,
683 .wrapper = mlx4_SET_PORT_wrapper
684 },
685 {
686 .opcode = MLX4_CMD_MAP_EQ,
687 .has_inbox = false,
688 .has_outbox = false,
689 .out_is_imm = false,
690 .encode_slave_id = false,
691 .verify = NULL,
692 .wrapper = mlx4_MAP_EQ_wrapper
693 },
694 {
695 .opcode = MLX4_CMD_SW2HW_EQ,
696 .has_inbox = true,
697 .has_outbox = false,
698 .out_is_imm = false,
699 .encode_slave_id = true,
700 .verify = NULL,
701 .wrapper = mlx4_SW2HW_EQ_wrapper
702 },
703 {
704 .opcode = MLX4_CMD_HW_HEALTH_CHECK,
705 .has_inbox = false,
706 .has_outbox = false,
707 .out_is_imm = false,
708 .encode_slave_id = false,
709 .verify = NULL,
710 .wrapper = NULL
711 },
712 {
713 .opcode = MLX4_CMD_NOP,
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_ALLOC_RES,
723 .has_inbox = false,
724 .has_outbox = false,
725 .out_is_imm = true,
726 .encode_slave_id = false,
727 .verify = NULL,
728 .wrapper = mlx4_ALLOC_RES_wrapper
729 },
730 {
731 .opcode = MLX4_CMD_FREE_RES,
732 .has_inbox = false,
733 .has_outbox = false,
734 .out_is_imm = false,
735 .encode_slave_id = false,
736 .verify = NULL,
737 .wrapper = mlx4_FREE_RES_wrapper
738 },
739 {
740 .opcode = MLX4_CMD_SW2HW_MPT,
741 .has_inbox = true,
742 .has_outbox = false,
743 .out_is_imm = false,
744 .encode_slave_id = true,
745 .verify = NULL,
746 .wrapper = mlx4_SW2HW_MPT_wrapper
747 },
748 {
749 .opcode = MLX4_CMD_QUERY_MPT,
750 .has_inbox = false,
751 .has_outbox = true,
752 .out_is_imm = false,
753 .encode_slave_id = false,
754 .verify = NULL,
755 .wrapper = mlx4_QUERY_MPT_wrapper
756 },
757 {
758 .opcode = MLX4_CMD_HW2SW_MPT,
759 .has_inbox = false,
760 .has_outbox = false,
761 .out_is_imm = false,
762 .encode_slave_id = false,
763 .verify = NULL,
764 .wrapper = mlx4_HW2SW_MPT_wrapper
765 },
766 {
767 .opcode = MLX4_CMD_READ_MTT,
768 .has_inbox = false,
769 .has_outbox = true,
770 .out_is_imm = false,
771 .encode_slave_id = false,
772 .verify = NULL,
773 .wrapper = NULL
774 },
775 {
776 .opcode = MLX4_CMD_WRITE_MTT,
777 .has_inbox = true,
778 .has_outbox = false,
779 .out_is_imm = false,
780 .encode_slave_id = false,
781 .verify = NULL,
782 .wrapper = mlx4_WRITE_MTT_wrapper
783 },
784 {
785 .opcode = MLX4_CMD_SYNC_TPT,
786 .has_inbox = true,
787 .has_outbox = false,
788 .out_is_imm = false,
789 .encode_slave_id = false,
790 .verify = NULL,
791 .wrapper = NULL
792 },
793 {
794 .opcode = MLX4_CMD_HW2SW_EQ,
795 .has_inbox = false,
796 .has_outbox = true,
797 .out_is_imm = false,
798 .encode_slave_id = true,
799 .verify = NULL,
800 .wrapper = mlx4_HW2SW_EQ_wrapper
801 },
802 {
803 .opcode = MLX4_CMD_QUERY_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_QUERY_EQ_wrapper
810 },
811 {
812 .opcode = MLX4_CMD_SW2HW_CQ,
813 .has_inbox = true,
814 .has_outbox = false,
815 .out_is_imm = false,
816 .encode_slave_id = true,
817 .verify = NULL,
818 .wrapper = mlx4_SW2HW_CQ_wrapper
819 },
820 {
821 .opcode = MLX4_CMD_HW2SW_CQ,
822 .has_inbox = false,
823 .has_outbox = false,
824 .out_is_imm = false,
825 .encode_slave_id = false,
826 .verify = NULL,
827 .wrapper = mlx4_HW2SW_CQ_wrapper
828 },
829 {
830 .opcode = MLX4_CMD_QUERY_CQ,
831 .has_inbox = false,
832 .has_outbox = true,
833 .out_is_imm = false,
834 .encode_slave_id = false,
835 .verify = NULL,
836 .wrapper = mlx4_QUERY_CQ_wrapper
837 },
838 {
839 .opcode = MLX4_CMD_MODIFY_CQ,
840 .has_inbox = true,
841 .has_outbox = false,
842 .out_is_imm = true,
843 .encode_slave_id = false,
844 .verify = NULL,
845 .wrapper = mlx4_MODIFY_CQ_wrapper
846 },
847 {
848 .opcode = MLX4_CMD_SW2HW_SRQ,
849 .has_inbox = true,
850 .has_outbox = false,
851 .out_is_imm = false,
852 .encode_slave_id = true,
853 .verify = NULL,
854 .wrapper = mlx4_SW2HW_SRQ_wrapper
855 },
856 {
857 .opcode = MLX4_CMD_HW2SW_SRQ,
858 .has_inbox = false,
859 .has_outbox = false,
860 .out_is_imm = false,
861 .encode_slave_id = false,
862 .verify = NULL,
863 .wrapper = mlx4_HW2SW_SRQ_wrapper
864 },
865 {
866 .opcode = MLX4_CMD_QUERY_SRQ,
867 .has_inbox = false,
868 .has_outbox = true,
869 .out_is_imm = false,
870 .encode_slave_id = false,
871 .verify = NULL,
872 .wrapper = mlx4_QUERY_SRQ_wrapper
873 },
874 {
875 .opcode = MLX4_CMD_ARM_SRQ,
876 .has_inbox = false,
877 .has_outbox = false,
878 .out_is_imm = false,
879 .encode_slave_id = false,
880 .verify = NULL,
881 .wrapper = mlx4_ARM_SRQ_wrapper
882 },
883 {
884 .opcode = MLX4_CMD_RST2INIT_QP,
885 .has_inbox = true,
886 .has_outbox = false,
887 .out_is_imm = false,
888 .encode_slave_id = true,
889 .verify = NULL,
890 .wrapper = mlx4_RST2INIT_QP_wrapper
891 },
892 {
893 .opcode = MLX4_CMD_INIT2INIT_QP,
894 .has_inbox = true,
895 .has_outbox = false,
896 .out_is_imm = false,
897 .encode_slave_id = false,
898 .verify = NULL,
899 .wrapper = mlx4_GEN_QP_wrapper
900 },
901 {
902 .opcode = MLX4_CMD_INIT2RTR_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_INIT2RTR_QP_wrapper
909 },
910 {
911 .opcode = MLX4_CMD_RTR2RTS_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_GEN_QP_wrapper
918 },
919 {
920 .opcode = MLX4_CMD_RTS2RTS_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_SQERR2RTS_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_2ERR_QP,
939 .has_inbox = false,
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_RTS2SQD_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_SQD2SQD_QP,
957 .has_inbox = true,
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_SQD2RTS_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_2RST_QP,
975 .has_inbox = false,
976 .has_outbox = false,
977 .out_is_imm = false,
978 .encode_slave_id = false,
979 .verify = NULL,
980 .wrapper = mlx4_2RST_QP_wrapper
981 },
982 {
983 .opcode = MLX4_CMD_QUERY_QP,
984 .has_inbox = false,
985 .has_outbox = true,
986 .out_is_imm = false,
987 .encode_slave_id = false,
988 .verify = NULL,
989 .wrapper = mlx4_GEN_QP_wrapper
990 },
991 {
992 .opcode = MLX4_CMD_SUSPEND_QP,
993 .has_inbox = false,
994 .has_outbox = false,
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_UNSUSPEND_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_QUERY_IF_STAT,
1011 .has_inbox = false,
1012 .has_outbox = true,
1013 .out_is_imm = false,
1014 .encode_slave_id = false,
1015 .verify = NULL,
1016 .wrapper = mlx4_QUERY_IF_STAT_wrapper
1017 },
1018 /* Native multicast commands are not available for guests */
1019 {
1020 .opcode = MLX4_CMD_QP_ATTACH,
1021 .has_inbox = true,
1022 .has_outbox = false,
1023 .out_is_imm = false,
1024 .encode_slave_id = false,
1025 .verify = NULL,
1026 .wrapper = mlx4_QP_ATTACH_wrapper
1027 },
1028 {
1029 .opcode = MLX4_CMD_PROMISC,
1030 .has_inbox = false,
1031 .has_outbox = false,
1032 .out_is_imm = false,
1033 .encode_slave_id = false,
1034 .verify = NULL,
1035 .wrapper = mlx4_PROMISC_wrapper
1036 },
1037 /* Ethernet specific commands */
1038 {
1039 .opcode = MLX4_CMD_SET_VLAN_FLTR,
1040 .has_inbox = true,
1041 .has_outbox = false,
1042 .out_is_imm = false,
1043 .encode_slave_id = false,
1044 .verify = NULL,
1045 .wrapper = mlx4_SET_VLAN_FLTR_wrapper
1046 },
1047 {
1048 .opcode = MLX4_CMD_SET_MCAST_FLTR,
1049 .has_inbox = false,
1050 .has_outbox = false,
1051 .out_is_imm = false,
1052 .encode_slave_id = false,
1053 .verify = NULL,
1054 .wrapper = mlx4_SET_MCAST_FLTR_wrapper
1055 },
1056 {
1057 .opcode = MLX4_CMD_DUMP_ETH_STATS,
1058 .has_inbox = false,
1059 .has_outbox = true,
1060 .out_is_imm = false,
1061 .encode_slave_id = false,
1062 .verify = NULL,
1063 .wrapper = mlx4_DUMP_ETH_STATS_wrapper
1064 },
1065 {
1066 .opcode = MLX4_CMD_INFORM_FLR_DONE,
1067 .has_inbox = false,
1068 .has_outbox = false,
1069 .out_is_imm = false,
1070 .encode_slave_id = false,
1071 .verify = NULL,
1072 .wrapper = NULL
1073 },
1074 };
1075
mlx4_master_process_vhcr(struct mlx4_dev * dev,int slave,struct mlx4_vhcr_cmd * in_vhcr)1076 static int mlx4_master_process_vhcr(struct mlx4_dev *dev, int slave,
1077 struct mlx4_vhcr_cmd *in_vhcr)
1078 {
1079 struct mlx4_priv *priv = mlx4_priv(dev);
1080 struct mlx4_cmd_info *cmd = NULL;
1081 struct mlx4_vhcr_cmd *vhcr_cmd = in_vhcr ? in_vhcr : priv->mfunc.vhcr;
1082 struct mlx4_vhcr *vhcr;
1083 struct mlx4_cmd_mailbox *inbox = NULL;
1084 struct mlx4_cmd_mailbox *outbox = NULL;
1085 u64 in_param;
1086 u64 out_param;
1087 int ret = 0;
1088 int i;
1089 int err = 0;
1090
1091 /* Create sw representation of Virtual HCR */
1092 vhcr = kzalloc(sizeof(struct mlx4_vhcr), GFP_KERNEL);
1093 if (!vhcr)
1094 return -ENOMEM;
1095
1096 /* DMA in the vHCR */
1097 if (!in_vhcr) {
1098 ret = mlx4_ACCESS_MEM(dev, priv->mfunc.vhcr_dma, slave,
1099 priv->mfunc.master.slave_state[slave].vhcr_dma,
1100 ALIGN(sizeof(struct mlx4_vhcr_cmd),
1101 MLX4_ACCESS_MEM_ALIGN), 1);
1102 if (ret) {
1103 mlx4_err(dev, "%s:Failed reading vhcr"
1104 "ret: 0x%x\n", __func__, ret);
1105 kfree(vhcr);
1106 return ret;
1107 }
1108 }
1109
1110 /* Fill SW VHCR fields */
1111 vhcr->in_param = be64_to_cpu(vhcr_cmd->in_param);
1112 vhcr->out_param = be64_to_cpu(vhcr_cmd->out_param);
1113 vhcr->in_modifier = be32_to_cpu(vhcr_cmd->in_modifier);
1114 vhcr->token = be16_to_cpu(vhcr_cmd->token);
1115 vhcr->op = be16_to_cpu(vhcr_cmd->opcode) & 0xfff;
1116 vhcr->op_modifier = (u8) (be16_to_cpu(vhcr_cmd->opcode) >> 12);
1117 vhcr->e_bit = vhcr_cmd->flags & (1 << 6);
1118
1119 /* Lookup command */
1120 for (i = 0; i < ARRAY_SIZE(cmd_info); ++i) {
1121 if (vhcr->op == cmd_info[i].opcode) {
1122 cmd = &cmd_info[i];
1123 break;
1124 }
1125 }
1126 if (!cmd) {
1127 mlx4_err(dev, "Unknown command:0x%x accepted from slave:%d\n",
1128 vhcr->op, slave);
1129 vhcr_cmd->status = CMD_STAT_BAD_PARAM;
1130 goto out_status;
1131 }
1132
1133 /* Read inbox */
1134 if (cmd->has_inbox) {
1135 vhcr->in_param &= INBOX_MASK;
1136 inbox = mlx4_alloc_cmd_mailbox(dev);
1137 if (IS_ERR(inbox)) {
1138 vhcr_cmd->status = CMD_STAT_BAD_SIZE;
1139 inbox = NULL;
1140 goto out_status;
1141 }
1142
1143 if (mlx4_ACCESS_MEM(dev, inbox->dma, slave,
1144 vhcr->in_param,
1145 MLX4_MAILBOX_SIZE, 1)) {
1146 mlx4_err(dev, "%s: Failed reading inbox (cmd:0x%x)\n",
1147 __func__, cmd->opcode);
1148 vhcr_cmd->status = CMD_STAT_INTERNAL_ERR;
1149 goto out_status;
1150 }
1151 }
1152
1153 /* Apply permission and bound checks if applicable */
1154 if (cmd->verify && cmd->verify(dev, slave, vhcr, inbox)) {
1155 mlx4_warn(dev, "Command:0x%x from slave: %d failed protection "
1156 "checks for resource_id:%d\n", vhcr->op, slave,
1157 vhcr->in_modifier);
1158 vhcr_cmd->status = CMD_STAT_BAD_OP;
1159 goto out_status;
1160 }
1161
1162 /* Allocate outbox */
1163 if (cmd->has_outbox) {
1164 outbox = mlx4_alloc_cmd_mailbox(dev);
1165 if (IS_ERR(outbox)) {
1166 vhcr_cmd->status = CMD_STAT_BAD_SIZE;
1167 outbox = NULL;
1168 goto out_status;
1169 }
1170 }
1171
1172 /* Execute the command! */
1173 if (cmd->wrapper) {
1174 err = cmd->wrapper(dev, slave, vhcr, inbox, outbox,
1175 cmd);
1176 if (cmd->out_is_imm)
1177 vhcr_cmd->out_param = cpu_to_be64(vhcr->out_param);
1178 } else {
1179 in_param = cmd->has_inbox ? (u64) inbox->dma :
1180 vhcr->in_param;
1181 out_param = cmd->has_outbox ? (u64) outbox->dma :
1182 vhcr->out_param;
1183 err = __mlx4_cmd(dev, in_param, &out_param,
1184 cmd->out_is_imm, vhcr->in_modifier,
1185 vhcr->op_modifier, vhcr->op,
1186 MLX4_CMD_TIME_CLASS_A,
1187 MLX4_CMD_NATIVE);
1188
1189 if (cmd->out_is_imm) {
1190 vhcr->out_param = out_param;
1191 vhcr_cmd->out_param = cpu_to_be64(vhcr->out_param);
1192 }
1193 }
1194
1195 if (err) {
1196 mlx4_warn(dev, "vhcr command:0x%x slave:%d failed with"
1197 " error:%d, status %d\n",
1198 vhcr->op, slave, vhcr->errno, err);
1199 vhcr_cmd->status = mlx4_errno_to_status(err);
1200 goto out_status;
1201 }
1202
1203
1204 /* Write outbox if command completed successfully */
1205 if (cmd->has_outbox && !vhcr_cmd->status) {
1206 ret = mlx4_ACCESS_MEM(dev, outbox->dma, slave,
1207 vhcr->out_param,
1208 MLX4_MAILBOX_SIZE, MLX4_CMD_WRAPPED);
1209 if (ret) {
1210 /* If we failed to write back the outbox after the
1211 *command was successfully executed, we must fail this
1212 * slave, as it is now in undefined state */
1213 mlx4_err(dev, "%s:Failed writing outbox\n", __func__);
1214 goto out;
1215 }
1216 }
1217
1218 out_status:
1219 /* DMA back vhcr result */
1220 if (!in_vhcr) {
1221 ret = mlx4_ACCESS_MEM(dev, priv->mfunc.vhcr_dma, slave,
1222 priv->mfunc.master.slave_state[slave].vhcr_dma,
1223 ALIGN(sizeof(struct mlx4_vhcr),
1224 MLX4_ACCESS_MEM_ALIGN),
1225 MLX4_CMD_WRAPPED);
1226 if (ret)
1227 mlx4_err(dev, "%s:Failed writing vhcr result\n",
1228 __func__);
1229 else if (vhcr->e_bit &&
1230 mlx4_GEN_EQE(dev, slave, &priv->mfunc.master.cmd_eqe))
1231 mlx4_warn(dev, "Failed to generate command completion "
1232 "eqe for slave %d\n", slave);
1233 }
1234
1235 out:
1236 kfree(vhcr);
1237 mlx4_free_cmd_mailbox(dev, inbox);
1238 mlx4_free_cmd_mailbox(dev, outbox);
1239 return ret;
1240 }
1241
mlx4_master_do_cmd(struct mlx4_dev * dev,int slave,u8 cmd,u16 param,u8 toggle)1242 static void mlx4_master_do_cmd(struct mlx4_dev *dev, int slave, u8 cmd,
1243 u16 param, u8 toggle)
1244 {
1245 struct mlx4_priv *priv = mlx4_priv(dev);
1246 struct mlx4_slave_state *slave_state = priv->mfunc.master.slave_state;
1247 u32 reply;
1248 u32 slave_status = 0;
1249 u8 is_going_down = 0;
1250 int i;
1251
1252 slave_state[slave].comm_toggle ^= 1;
1253 reply = (u32) slave_state[slave].comm_toggle << 31;
1254 if (toggle != slave_state[slave].comm_toggle) {
1255 mlx4_warn(dev, "Incorrect toggle %d from slave %d. *** MASTER"
1256 "STATE COMPROMISIED ***\n", toggle, slave);
1257 goto reset_slave;
1258 }
1259 if (cmd == MLX4_COMM_CMD_RESET) {
1260 mlx4_warn(dev, "Received reset from slave:%d\n", slave);
1261 slave_state[slave].active = false;
1262 for (i = 0; i < MLX4_EVENT_TYPES_NUM; ++i) {
1263 slave_state[slave].event_eq[i].eqn = -1;
1264 slave_state[slave].event_eq[i].token = 0;
1265 }
1266 /*check if we are in the middle of FLR process,
1267 if so return "retry" status to the slave*/
1268 if (MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd) {
1269 slave_status = MLX4_DELAY_RESET_SLAVE;
1270 goto inform_slave_state;
1271 }
1272
1273 /* write the version in the event field */
1274 reply |= mlx4_comm_get_version();
1275
1276 goto reset_slave;
1277 }
1278 /*command from slave in the middle of FLR*/
1279 if (cmd != MLX4_COMM_CMD_RESET &&
1280 MLX4_COMM_CMD_FLR == slave_state[slave].last_cmd) {
1281 mlx4_warn(dev, "slave:%d is Trying to run cmd(0x%x) "
1282 "in the middle of FLR\n", slave, cmd);
1283 return;
1284 }
1285
1286 switch (cmd) {
1287 case MLX4_COMM_CMD_VHCR0:
1288 if (slave_state[slave].last_cmd != MLX4_COMM_CMD_RESET)
1289 goto reset_slave;
1290 slave_state[slave].vhcr_dma = ((u64) param) << 48;
1291 priv->mfunc.master.slave_state[slave].cookie = 0;
1292 mutex_init(&priv->mfunc.master.gen_eqe_mutex[slave]);
1293 break;
1294 case MLX4_COMM_CMD_VHCR1:
1295 if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR0)
1296 goto reset_slave;
1297 slave_state[slave].vhcr_dma |= ((u64) param) << 32;
1298 break;
1299 case MLX4_COMM_CMD_VHCR2:
1300 if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR1)
1301 goto reset_slave;
1302 slave_state[slave].vhcr_dma |= ((u64) param) << 16;
1303 break;
1304 case MLX4_COMM_CMD_VHCR_EN:
1305 if (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR2)
1306 goto reset_slave;
1307 slave_state[slave].vhcr_dma |= param;
1308 slave_state[slave].active = true;
1309 break;
1310 case MLX4_COMM_CMD_VHCR_POST:
1311 if ((slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_EN) &&
1312 (slave_state[slave].last_cmd != MLX4_COMM_CMD_VHCR_POST))
1313 goto reset_slave;
1314 down(&priv->cmd.slave_sem);
1315 if (mlx4_master_process_vhcr(dev, slave, NULL)) {
1316 mlx4_err(dev, "Failed processing vhcr for slave:%d,"
1317 " reseting slave.\n", slave);
1318 up(&priv->cmd.slave_sem);
1319 goto reset_slave;
1320 }
1321 up(&priv->cmd.slave_sem);
1322 break;
1323 default:
1324 mlx4_warn(dev, "Bad comm cmd:%d from slave:%d\n", cmd, slave);
1325 goto reset_slave;
1326 }
1327 spin_lock(&priv->mfunc.master.slave_state_lock);
1328 if (!slave_state[slave].is_slave_going_down)
1329 slave_state[slave].last_cmd = cmd;
1330 else
1331 is_going_down = 1;
1332 spin_unlock(&priv->mfunc.master.slave_state_lock);
1333 if (is_going_down) {
1334 mlx4_warn(dev, "Slave is going down aborting command(%d)"
1335 " executing from slave:%d\n",
1336 cmd, slave);
1337 return;
1338 }
1339 __raw_writel((__force u32) cpu_to_be32(reply),
1340 &priv->mfunc.comm[slave].slave_read);
1341 mmiowb();
1342
1343 return;
1344
1345 reset_slave:
1346 /* cleanup any slave resources */
1347 mlx4_delete_all_resources_for_slave(dev, slave);
1348 spin_lock(&priv->mfunc.master.slave_state_lock);
1349 if (!slave_state[slave].is_slave_going_down)
1350 slave_state[slave].last_cmd = MLX4_COMM_CMD_RESET;
1351 spin_unlock(&priv->mfunc.master.slave_state_lock);
1352 /*with slave in the middle of flr, no need to clean resources again.*/
1353 inform_slave_state:
1354 memset(&slave_state[slave].event_eq, 0,
1355 sizeof(struct mlx4_slave_event_eq_info));
1356 __raw_writel((__force u32) cpu_to_be32(reply),
1357 &priv->mfunc.comm[slave].slave_read);
1358 wmb();
1359 }
1360
1361 /* master command processing */
mlx4_master_comm_channel(struct work_struct * work)1362 void mlx4_master_comm_channel(struct work_struct *work)
1363 {
1364 struct mlx4_mfunc_master_ctx *master =
1365 container_of(work,
1366 struct mlx4_mfunc_master_ctx,
1367 comm_work);
1368 struct mlx4_mfunc *mfunc =
1369 container_of(master, struct mlx4_mfunc, master);
1370 struct mlx4_priv *priv =
1371 container_of(mfunc, struct mlx4_priv, mfunc);
1372 struct mlx4_dev *dev = &priv->dev;
1373 __be32 *bit_vec;
1374 u32 comm_cmd;
1375 u32 vec;
1376 int i, j, slave;
1377 int toggle;
1378 int served = 0;
1379 int reported = 0;
1380 u32 slt;
1381
1382 bit_vec = master->comm_arm_bit_vector;
1383 for (i = 0; i < COMM_CHANNEL_BIT_ARRAY_SIZE; i++) {
1384 vec = be32_to_cpu(bit_vec[i]);
1385 for (j = 0; j < 32; j++) {
1386 if (!(vec & (1 << j)))
1387 continue;
1388 ++reported;
1389 slave = (i * 32) + j;
1390 comm_cmd = swab32(readl(
1391 &mfunc->comm[slave].slave_write));
1392 slt = swab32(readl(&mfunc->comm[slave].slave_read))
1393 >> 31;
1394 toggle = comm_cmd >> 31;
1395 if (toggle != slt) {
1396 if (master->slave_state[slave].comm_toggle
1397 != slt) {
1398 printk(KERN_INFO "slave %d out of sync."
1399 " read toggle %d, state toggle %d. "
1400 "Resynching.\n", slave, slt,
1401 master->slave_state[slave].comm_toggle);
1402 master->slave_state[slave].comm_toggle =
1403 slt;
1404 }
1405 mlx4_master_do_cmd(dev, slave,
1406 comm_cmd >> 16 & 0xff,
1407 comm_cmd & 0xffff, toggle);
1408 ++served;
1409 }
1410 }
1411 }
1412
1413 if (reported && reported != served)
1414 mlx4_warn(dev, "Got command event with bitmask from %d slaves"
1415 " but %d were served\n",
1416 reported, served);
1417
1418 if (mlx4_ARM_COMM_CHANNEL(dev))
1419 mlx4_warn(dev, "Failed to arm comm channel events\n");
1420 }
1421
sync_toggles(struct mlx4_dev * dev)1422 static int sync_toggles(struct mlx4_dev *dev)
1423 {
1424 struct mlx4_priv *priv = mlx4_priv(dev);
1425 int wr_toggle;
1426 int rd_toggle;
1427 unsigned long end;
1428
1429 wr_toggle = swab32(readl(&priv->mfunc.comm->slave_write)) >> 31;
1430 end = jiffies + msecs_to_jiffies(5000);
1431
1432 while (time_before(jiffies, end)) {
1433 rd_toggle = swab32(readl(&priv->mfunc.comm->slave_read)) >> 31;
1434 if (rd_toggle == wr_toggle) {
1435 priv->cmd.comm_toggle = rd_toggle;
1436 return 0;
1437 }
1438
1439 cond_resched();
1440 }
1441
1442 /*
1443 * we could reach here if for example the previous VM using this
1444 * function misbehaved and left the channel with unsynced state. We
1445 * should fix this here and give this VM a chance to use a properly
1446 * synced channel
1447 */
1448 mlx4_warn(dev, "recovering from previously mis-behaved VM\n");
1449 __raw_writel((__force u32) 0, &priv->mfunc.comm->slave_read);
1450 __raw_writel((__force u32) 0, &priv->mfunc.comm->slave_write);
1451 priv->cmd.comm_toggle = 0;
1452
1453 return 0;
1454 }
1455
mlx4_multi_func_init(struct mlx4_dev * dev)1456 int mlx4_multi_func_init(struct mlx4_dev *dev)
1457 {
1458 struct mlx4_priv *priv = mlx4_priv(dev);
1459 struct mlx4_slave_state *s_state;
1460 int i, j, err, port;
1461
1462 priv->mfunc.vhcr = dma_alloc_coherent(&(dev->pdev->dev), PAGE_SIZE,
1463 &priv->mfunc.vhcr_dma,
1464 GFP_KERNEL);
1465 if (!priv->mfunc.vhcr) {
1466 mlx4_err(dev, "Couldn't allocate vhcr.\n");
1467 return -ENOMEM;
1468 }
1469
1470 if (mlx4_is_master(dev))
1471 priv->mfunc.comm =
1472 ioremap(pci_resource_start(dev->pdev, priv->fw.comm_bar) +
1473 priv->fw.comm_base, MLX4_COMM_PAGESIZE);
1474 else
1475 priv->mfunc.comm =
1476 ioremap(pci_resource_start(dev->pdev, 2) +
1477 MLX4_SLAVE_COMM_BASE, MLX4_COMM_PAGESIZE);
1478 if (!priv->mfunc.comm) {
1479 mlx4_err(dev, "Couldn't map communication vector.\n");
1480 goto err_vhcr;
1481 }
1482
1483 if (mlx4_is_master(dev)) {
1484 priv->mfunc.master.slave_state =
1485 kzalloc(dev->num_slaves *
1486 sizeof(struct mlx4_slave_state), GFP_KERNEL);
1487 if (!priv->mfunc.master.slave_state)
1488 goto err_comm;
1489
1490 for (i = 0; i < dev->num_slaves; ++i) {
1491 s_state = &priv->mfunc.master.slave_state[i];
1492 s_state->last_cmd = MLX4_COMM_CMD_RESET;
1493 for (j = 0; j < MLX4_EVENT_TYPES_NUM; ++j)
1494 s_state->event_eq[j].eqn = -1;
1495 __raw_writel((__force u32) 0,
1496 &priv->mfunc.comm[i].slave_write);
1497 __raw_writel((__force u32) 0,
1498 &priv->mfunc.comm[i].slave_read);
1499 mmiowb();
1500 for (port = 1; port <= MLX4_MAX_PORTS; port++) {
1501 s_state->vlan_filter[port] =
1502 kzalloc(sizeof(struct mlx4_vlan_fltr),
1503 GFP_KERNEL);
1504 if (!s_state->vlan_filter[port]) {
1505 if (--port)
1506 kfree(s_state->vlan_filter[port]);
1507 goto err_slaves;
1508 }
1509 INIT_LIST_HEAD(&s_state->mcast_filters[port]);
1510 }
1511 spin_lock_init(&s_state->lock);
1512 }
1513
1514 memset(&priv->mfunc.master.cmd_eqe, 0, sizeof(struct mlx4_eqe));
1515 priv->mfunc.master.cmd_eqe.type = MLX4_EVENT_TYPE_CMD;
1516 INIT_WORK(&priv->mfunc.master.comm_work,
1517 mlx4_master_comm_channel);
1518 INIT_WORK(&priv->mfunc.master.slave_event_work,
1519 mlx4_gen_slave_eqe);
1520 INIT_WORK(&priv->mfunc.master.slave_flr_event_work,
1521 mlx4_master_handle_slave_flr);
1522 spin_lock_init(&priv->mfunc.master.slave_state_lock);
1523 priv->mfunc.master.comm_wq =
1524 create_singlethread_workqueue("mlx4_comm");
1525 if (!priv->mfunc.master.comm_wq)
1526 goto err_slaves;
1527
1528 if (mlx4_init_resource_tracker(dev))
1529 goto err_thread;
1530
1531 sema_init(&priv->cmd.slave_sem, 1);
1532 err = mlx4_ARM_COMM_CHANNEL(dev);
1533 if (err) {
1534 mlx4_err(dev, " Failed to arm comm channel eq: %x\n",
1535 err);
1536 goto err_resource;
1537 }
1538
1539 } else {
1540 err = sync_toggles(dev);
1541 if (err) {
1542 mlx4_err(dev, "Couldn't sync toggles\n");
1543 goto err_comm;
1544 }
1545
1546 sema_init(&priv->cmd.slave_sem, 1);
1547 }
1548 return 0;
1549
1550 err_resource:
1551 mlx4_free_resource_tracker(dev);
1552 err_thread:
1553 flush_workqueue(priv->mfunc.master.comm_wq);
1554 destroy_workqueue(priv->mfunc.master.comm_wq);
1555 err_slaves:
1556 while (--i) {
1557 for (port = 1; port <= MLX4_MAX_PORTS; port++)
1558 kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
1559 }
1560 kfree(priv->mfunc.master.slave_state);
1561 err_comm:
1562 iounmap(priv->mfunc.comm);
1563 err_vhcr:
1564 dma_free_coherent(&(dev->pdev->dev), PAGE_SIZE,
1565 priv->mfunc.vhcr,
1566 priv->mfunc.vhcr_dma);
1567 priv->mfunc.vhcr = NULL;
1568 return -ENOMEM;
1569 }
1570
mlx4_cmd_init(struct mlx4_dev * dev)1571 int mlx4_cmd_init(struct mlx4_dev *dev)
1572 {
1573 struct mlx4_priv *priv = mlx4_priv(dev);
1574
1575 mutex_init(&priv->cmd.hcr_mutex);
1576 sema_init(&priv->cmd.poll_sem, 1);
1577 priv->cmd.use_events = 0;
1578 priv->cmd.toggle = 1;
1579
1580 priv->cmd.hcr = NULL;
1581 priv->mfunc.vhcr = NULL;
1582
1583 if (!mlx4_is_slave(dev)) {
1584 priv->cmd.hcr = ioremap(pci_resource_start(dev->pdev, 0) +
1585 MLX4_HCR_BASE, MLX4_HCR_SIZE);
1586 if (!priv->cmd.hcr) {
1587 mlx4_err(dev, "Couldn't map command register.\n");
1588 return -ENOMEM;
1589 }
1590 }
1591
1592 priv->cmd.pool = pci_pool_create("mlx4_cmd", dev->pdev,
1593 MLX4_MAILBOX_SIZE,
1594 MLX4_MAILBOX_SIZE, 0);
1595 if (!priv->cmd.pool)
1596 goto err_hcr;
1597
1598 return 0;
1599
1600 err_hcr:
1601 if (!mlx4_is_slave(dev))
1602 iounmap(priv->cmd.hcr);
1603 return -ENOMEM;
1604 }
1605
mlx4_multi_func_cleanup(struct mlx4_dev * dev)1606 void mlx4_multi_func_cleanup(struct mlx4_dev *dev)
1607 {
1608 struct mlx4_priv *priv = mlx4_priv(dev);
1609 int i, port;
1610
1611 if (mlx4_is_master(dev)) {
1612 flush_workqueue(priv->mfunc.master.comm_wq);
1613 destroy_workqueue(priv->mfunc.master.comm_wq);
1614 for (i = 0; i < dev->num_slaves; i++) {
1615 for (port = 1; port <= MLX4_MAX_PORTS; port++)
1616 kfree(priv->mfunc.master.slave_state[i].vlan_filter[port]);
1617 }
1618 kfree(priv->mfunc.master.slave_state);
1619 }
1620
1621 iounmap(priv->mfunc.comm);
1622 dma_free_coherent(&(dev->pdev->dev), PAGE_SIZE,
1623 priv->mfunc.vhcr, priv->mfunc.vhcr_dma);
1624 priv->mfunc.vhcr = NULL;
1625 }
1626
mlx4_cmd_cleanup(struct mlx4_dev * dev)1627 void mlx4_cmd_cleanup(struct mlx4_dev *dev)
1628 {
1629 struct mlx4_priv *priv = mlx4_priv(dev);
1630
1631 pci_pool_destroy(priv->cmd.pool);
1632
1633 if (!mlx4_is_slave(dev))
1634 iounmap(priv->cmd.hcr);
1635 }
1636
1637 /*
1638 * Switch to using events to issue FW commands (can only be called
1639 * after event queue for command events has been initialized).
1640 */
mlx4_cmd_use_events(struct mlx4_dev * dev)1641 int mlx4_cmd_use_events(struct mlx4_dev *dev)
1642 {
1643 struct mlx4_priv *priv = mlx4_priv(dev);
1644 int i;
1645 int err = 0;
1646
1647 priv->cmd.context = kmalloc(priv->cmd.max_cmds *
1648 sizeof (struct mlx4_cmd_context),
1649 GFP_KERNEL);
1650 if (!priv->cmd.context)
1651 return -ENOMEM;
1652
1653 for (i = 0; i < priv->cmd.max_cmds; ++i) {
1654 priv->cmd.context[i].token = i;
1655 priv->cmd.context[i].next = i + 1;
1656 }
1657
1658 priv->cmd.context[priv->cmd.max_cmds - 1].next = -1;
1659 priv->cmd.free_head = 0;
1660
1661 sema_init(&priv->cmd.event_sem, priv->cmd.max_cmds);
1662 spin_lock_init(&priv->cmd.context_lock);
1663
1664 for (priv->cmd.token_mask = 1;
1665 priv->cmd.token_mask < priv->cmd.max_cmds;
1666 priv->cmd.token_mask <<= 1)
1667 ; /* nothing */
1668 --priv->cmd.token_mask;
1669
1670 down(&priv->cmd.poll_sem);
1671 priv->cmd.use_events = 1;
1672
1673 return err;
1674 }
1675
1676 /*
1677 * Switch back to polling (used when shutting down the device)
1678 */
mlx4_cmd_use_polling(struct mlx4_dev * dev)1679 void mlx4_cmd_use_polling(struct mlx4_dev *dev)
1680 {
1681 struct mlx4_priv *priv = mlx4_priv(dev);
1682 int i;
1683
1684 priv->cmd.use_events = 0;
1685
1686 for (i = 0; i < priv->cmd.max_cmds; ++i)
1687 down(&priv->cmd.event_sem);
1688
1689 kfree(priv->cmd.context);
1690
1691 up(&priv->cmd.poll_sem);
1692 }
1693
mlx4_alloc_cmd_mailbox(struct mlx4_dev * dev)1694 struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev)
1695 {
1696 struct mlx4_cmd_mailbox *mailbox;
1697
1698 mailbox = kmalloc(sizeof *mailbox, GFP_KERNEL);
1699 if (!mailbox)
1700 return ERR_PTR(-ENOMEM);
1701
1702 mailbox->buf = pci_pool_alloc(mlx4_priv(dev)->cmd.pool, GFP_KERNEL,
1703 &mailbox->dma);
1704 if (!mailbox->buf) {
1705 kfree(mailbox);
1706 return ERR_PTR(-ENOMEM);
1707 }
1708
1709 return mailbox;
1710 }
1711 EXPORT_SYMBOL_GPL(mlx4_alloc_cmd_mailbox);
1712
mlx4_free_cmd_mailbox(struct mlx4_dev * dev,struct mlx4_cmd_mailbox * mailbox)1713 void mlx4_free_cmd_mailbox(struct mlx4_dev *dev,
1714 struct mlx4_cmd_mailbox *mailbox)
1715 {
1716 if (!mailbox)
1717 return;
1718
1719 pci_pool_free(mlx4_priv(dev)->cmd.pool, mailbox->buf, mailbox->dma);
1720 kfree(mailbox);
1721 }
1722 EXPORT_SYMBOL_GPL(mlx4_free_cmd_mailbox);
1723
mlx4_comm_get_version(void)1724 u32 mlx4_comm_get_version(void)
1725 {
1726 return ((u32) CMD_CHAN_IF_REV << 8) | (u32) CMD_CHAN_VER;
1727 }
1728