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.
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:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
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.
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
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>
41 #include <linux/mlx4/cmd.h>
42 #include <linux/semaphore.h>
49 #define CMD_POLL_TOKEN 0xffff
50 #define INBOX_MASK 0xffffffffffffff00ULL
52 #define CMD_CHAN_VER 1
53 #define CMD_CHAN_IF_REV 1
56 /* command completed successfully: */
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,
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,
103 HCR_OPMOD_SHIFT
= 12,
110 GO_BIT_TIMEOUT_MSECS
= 10000
113 struct mlx4_cmd_context
{
114 struct completion done
;
122 static int mlx4_master_process_vhcr(struct mlx4_dev
*dev
, int slave
,
123 struct mlx4_vhcr_cmd
*in_vhcr
);
125 static int mlx4_status_to_errno(u8 status
)
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
,
148 if (status
>= ARRAY_SIZE(trans_table
) ||
149 (status
!= CMD_STAT_OK
&& trans_table
[status
] == 0))
152 return trans_table
[status
];
155 static int comm_pending(struct mlx4_dev
*dev
)
157 struct mlx4_priv
*priv
= mlx4_priv(dev
);
158 u32 status
= readl(&priv
->mfunc
.comm
->slave_read
);
160 return (swab32(status
) >> 31) != priv
->cmd
.comm_toggle
;
163 static void mlx4_comm_cmd_post(struct mlx4_dev
*dev
, u8 cmd
, u16 param
)
165 struct mlx4_priv
*priv
= mlx4_priv(dev
);
168 priv
->cmd
.comm_toggle
^= 1;
169 val
= param
| (cmd
<< 16) | (priv
->cmd
.comm_toggle
<< 31);
170 __raw_writel((__force u32
) cpu_to_be32(val
),
171 &priv
->mfunc
.comm
->slave_write
);
175 static int mlx4_comm_cmd_poll(struct mlx4_dev
*dev
, u8 cmd
, u16 param
,
176 unsigned long timeout
)
178 struct mlx4_priv
*priv
= mlx4_priv(dev
);
181 int ret_from_pending
= 0;
183 /* First, verify that the master reports correct status */
184 if (comm_pending(dev
)) {
185 mlx4_warn(dev
, "Communication channel is not idle."
186 "my toggle is %d (cmd:0x%x)\n",
187 priv
->cmd
.comm_toggle
, cmd
);
192 down(&priv
->cmd
.poll_sem
);
193 mlx4_comm_cmd_post(dev
, cmd
, param
);
195 end
= msecs_to_jiffies(timeout
) + jiffies
;
196 while (comm_pending(dev
) && time_before(jiffies
, end
))
198 ret_from_pending
= comm_pending(dev
);
199 if (ret_from_pending
) {
200 /* check if the slave is trying to boot in the middle of
201 * FLR process. The only non-zero result in the RESET command
202 * is MLX4_DELAY_RESET_SLAVE*/
203 if ((MLX4_COMM_CMD_RESET
== cmd
)) {
204 mlx4_warn(dev
, "Got slave FLRed from Communication"
205 " channel (ret:0x%x)\n", ret_from_pending
);
206 err
= MLX4_DELAY_RESET_SLAVE
;
208 mlx4_warn(dev
, "Communication channel timed out\n");
213 up(&priv
->cmd
.poll_sem
);
217 static int mlx4_comm_cmd_wait(struct mlx4_dev
*dev
, u8 op
,
218 u16 param
, unsigned long timeout
)
220 struct mlx4_cmd
*cmd
= &mlx4_priv(dev
)->cmd
;
221 struct mlx4_cmd_context
*context
;
224 down(&cmd
->event_sem
);
226 spin_lock(&cmd
->context_lock
);
227 BUG_ON(cmd
->free_head
< 0);
228 context
= &cmd
->context
[cmd
->free_head
];
229 context
->token
+= cmd
->token_mask
+ 1;
230 cmd
->free_head
= context
->next
;
231 spin_unlock(&cmd
->context_lock
);
233 init_completion(&context
->done
);
235 mlx4_comm_cmd_post(dev
, op
, param
);
237 if (!wait_for_completion_timeout(&context
->done
,
238 msecs_to_jiffies(timeout
))) {
243 err
= context
->result
;
244 if (err
&& context
->fw_status
!= CMD_STAT_MULTI_FUNC_REQ
) {
245 mlx4_err(dev
, "command 0x%x failed: fw status = 0x%x\n",
246 op
, context
->fw_status
);
251 spin_lock(&cmd
->context_lock
);
252 context
->next
= cmd
->free_head
;
253 cmd
->free_head
= context
- cmd
->context
;
254 spin_unlock(&cmd
->context_lock
);
260 static int mlx4_comm_cmd(struct mlx4_dev
*dev
, u8 cmd
, u16 param
,
261 unsigned long timeout
)
263 if (mlx4_priv(dev
)->cmd
.use_events
)
264 return mlx4_comm_cmd_wait(dev
, cmd
, param
, timeout
);
265 return mlx4_comm_cmd_poll(dev
, cmd
, param
, timeout
);
268 static int cmd_pending(struct mlx4_dev
*dev
)
270 u32 status
= readl(mlx4_priv(dev
)->cmd
.hcr
+ HCR_STATUS_OFFSET
);
272 return (status
& swab32(1 << HCR_GO_BIT
)) ||
273 (mlx4_priv(dev
)->cmd
.toggle
==
274 !!(status
& swab32(1 << HCR_T_BIT
)));
277 static int mlx4_cmd_post(struct mlx4_dev
*dev
, u64 in_param
, u64 out_param
,
278 u32 in_modifier
, u8 op_modifier
, u16 op
, u16 token
,
281 struct mlx4_cmd
*cmd
= &mlx4_priv(dev
)->cmd
;
282 u32 __iomem
*hcr
= cmd
->hcr
;
286 mutex_lock(&cmd
->hcr_mutex
);
290 end
+= msecs_to_jiffies(GO_BIT_TIMEOUT_MSECS
);
292 while (cmd_pending(dev
)) {
293 if (time_after_eq(jiffies
, end
)) {
294 mlx4_err(dev
, "%s:cmd_pending failed\n", __func__
);
301 * We use writel (instead of something like memcpy_toio)
302 * because writes of less than 32 bits to the HCR don't work
303 * (and some architectures such as ia64 implement memcpy_toio
304 * in terms of writeb).
306 __raw_writel((__force u32
) cpu_to_be32(in_param
>> 32), hcr
+ 0);
307 __raw_writel((__force u32
) cpu_to_be32(in_param
& 0xfffffffful
), hcr
+ 1);
308 __raw_writel((__force u32
) cpu_to_be32(in_modifier
), hcr
+ 2);
309 __raw_writel((__force u32
) cpu_to_be32(out_param
>> 32), hcr
+ 3);
310 __raw_writel((__force u32
) cpu_to_be32(out_param
& 0xfffffffful
), hcr
+ 4);
311 __raw_writel((__force u32
) cpu_to_be32(token
<< 16), hcr
+ 5);
313 /* __raw_writel may not order writes. */
316 __raw_writel((__force u32
) cpu_to_be32((1 << HCR_GO_BIT
) |
317 (cmd
->toggle
<< HCR_T_BIT
) |
318 (event
? (1 << HCR_E_BIT
) : 0) |
319 (op_modifier
<< HCR_OPMOD_SHIFT
) |
323 * Make sure that our HCR writes don't get mixed in with
324 * writes from another CPU starting a FW command.
328 cmd
->toggle
= cmd
->toggle
^ 1;
333 mutex_unlock(&cmd
->hcr_mutex
);
337 static int mlx4_slave_cmd(struct mlx4_dev
*dev
, u64 in_param
, u64
*out_param
,
338 int out_is_imm
, u32 in_modifier
, u8 op_modifier
,
339 u16 op
, unsigned long timeout
)
341 struct mlx4_priv
*priv
= mlx4_priv(dev
);
342 struct mlx4_vhcr_cmd
*vhcr
= priv
->mfunc
.vhcr
;
345 down(&priv
->cmd
.slave_sem
);
346 vhcr
->in_param
= cpu_to_be64(in_param
);
347 vhcr
->out_param
= out_param
? cpu_to_be64(*out_param
) : 0;
348 vhcr
->in_modifier
= cpu_to_be32(in_modifier
);
349 vhcr
->opcode
= cpu_to_be16((((u16
) op_modifier
) << 12) | (op
& 0xfff));
350 vhcr
->token
= cpu_to_be16(CMD_POLL_TOKEN
);
352 vhcr
->flags
= !!(priv
->cmd
.use_events
) << 6;
353 if (mlx4_is_master(dev
)) {
354 ret
= mlx4_master_process_vhcr(dev
, dev
->caps
.function
, vhcr
);
359 be64_to_cpu(vhcr
->out_param
);
361 mlx4_err(dev
, "response expected while"
362 "output mailbox is NULL for "
363 "command 0x%x\n", op
);
364 vhcr
->status
= -EINVAL
;
370 ret
= mlx4_comm_cmd(dev
, MLX4_COMM_CMD_VHCR_POST
, 0,
371 MLX4_COMM_TIME
+ timeout
);
376 be64_to_cpu(vhcr
->out_param
);
378 mlx4_err(dev
, "response expected while"
379 "output mailbox is NULL for "
380 "command 0x%x\n", op
);
381 vhcr
->status
= -EINVAL
;
386 mlx4_err(dev
, "failed execution of VHCR_POST command"
387 "opcode 0x%x\n", op
);
389 up(&priv
->cmd
.slave_sem
);
393 static int mlx4_cmd_poll(struct mlx4_dev
*dev
, u64 in_param
, u64
*out_param
,
394 int out_is_imm
, u32 in_modifier
, u8 op_modifier
,
395 u16 op
, unsigned long timeout
)
397 struct mlx4_priv
*priv
= mlx4_priv(dev
);
398 void __iomem
*hcr
= priv
->cmd
.hcr
;
403 down(&priv
->cmd
.poll_sem
);
405 err
= mlx4_cmd_post(dev
, in_param
, out_param
? *out_param
: 0,
406 in_modifier
, op_modifier
, op
, CMD_POLL_TOKEN
, 0);
410 end
= msecs_to_jiffies(timeout
) + jiffies
;
411 while (cmd_pending(dev
) && time_before(jiffies
, end
))
414 if (cmd_pending(dev
)) {
421 (u64
) be32_to_cpu((__force __be32
)
422 __raw_readl(hcr
+ HCR_OUT_PARAM_OFFSET
)) << 32 |
423 (u64
) be32_to_cpu((__force __be32
)
424 __raw_readl(hcr
+ HCR_OUT_PARAM_OFFSET
+ 4));
425 stat
= be32_to_cpu((__force __be32
)
426 __raw_readl(hcr
+ HCR_STATUS_OFFSET
)) >> 24;
427 err
= mlx4_status_to_errno(stat
);
429 mlx4_err(dev
, "command 0x%x failed: fw status = 0x%x\n",
433 up(&priv
->cmd
.poll_sem
);
437 void mlx4_cmd_event(struct mlx4_dev
*dev
, u16 token
, u8 status
, u64 out_param
)
439 struct mlx4_priv
*priv
= mlx4_priv(dev
);
440 struct mlx4_cmd_context
*context
=
441 &priv
->cmd
.context
[token
& priv
->cmd
.token_mask
];
443 /* previously timed out command completing at long last */
444 if (token
!= context
->token
)
447 context
->fw_status
= status
;
448 context
->result
= mlx4_status_to_errno(status
);
449 context
->out_param
= out_param
;
451 complete(&context
->done
);
454 static int mlx4_cmd_wait(struct mlx4_dev
*dev
, u64 in_param
, u64
*out_param
,
455 int out_is_imm
, u32 in_modifier
, u8 op_modifier
,
456 u16 op
, unsigned long timeout
)
458 struct mlx4_cmd
*cmd
= &mlx4_priv(dev
)->cmd
;
459 struct mlx4_cmd_context
*context
;
462 down(&cmd
->event_sem
);
464 spin_lock(&cmd
->context_lock
);
465 BUG_ON(cmd
->free_head
< 0);
466 context
= &cmd
->context
[cmd
->free_head
];
467 context
->token
+= cmd
->token_mask
+ 1;
468 cmd
->free_head
= context
->next
;
469 spin_unlock(&cmd
->context_lock
);
471 init_completion(&context
->done
);
473 mlx4_cmd_post(dev
, in_param
, out_param
? *out_param
: 0,
474 in_modifier
, op_modifier
, op
, context
->token
, 1);
476 if (!wait_for_completion_timeout(&context
->done
,
477 msecs_to_jiffies(timeout
))) {
482 err
= context
->result
;
484 mlx4_err(dev
, "command 0x%x failed: fw status = 0x%x\n",
485 op
, context
->fw_status
);
490 *out_param
= context
->out_param
;
493 spin_lock(&cmd
->context_lock
);
494 context
->next
= cmd
->free_head
;
495 cmd
->free_head
= context
- cmd
->context
;
496 spin_unlock(&cmd
->context_lock
);
502 int __mlx4_cmd(struct mlx4_dev
*dev
, u64 in_param
, u64
*out_param
,
503 int out_is_imm
, u32 in_modifier
, u8 op_modifier
,
504 u16 op
, unsigned long timeout
, int native
)
506 if (!mlx4_is_mfunc(dev
) || (native
&& mlx4_is_master(dev
))) {
507 if (mlx4_priv(dev
)->cmd
.use_events
)
508 return mlx4_cmd_wait(dev
, in_param
, out_param
,
509 out_is_imm
, in_modifier
,
510 op_modifier
, op
, timeout
);
512 return mlx4_cmd_poll(dev
, in_param
, out_param
,
513 out_is_imm
, in_modifier
,
514 op_modifier
, op
, timeout
);
516 return mlx4_slave_cmd(dev
, in_param
, out_param
, out_is_imm
,
517 in_modifier
, op_modifier
, op
, timeout
);
519 EXPORT_SYMBOL_GPL(__mlx4_cmd
);
522 static int mlx4_ARM_COMM_CHANNEL(struct mlx4_dev
*dev
)
524 return mlx4_cmd(dev
, 0, 0, 0, MLX4_CMD_ARM_COMM_CHANNEL
,
525 MLX4_CMD_TIME_CLASS_B
, MLX4_CMD_NATIVE
);
528 static int mlx4_ACCESS_MEM(struct mlx4_dev
*dev
, u64 master_addr
,
529 int slave
, u64 slave_addr
,
530 int size
, int is_read
)
535 if ((slave_addr
& 0xfff) | (master_addr
& 0xfff) |
536 (slave
& ~0x7f) | (size
& 0xff)) {
537 mlx4_err(dev
, "Bad access mem params - slave_addr:0x%llx "
538 "master_addr:0x%llx slave_id:%d size:%d\n",
539 slave_addr
, master_addr
, slave
, size
);
544 in_param
= (u64
) slave
| slave_addr
;
545 out_param
= (u64
) dev
->caps
.function
| master_addr
;
547 in_param
= (u64
) dev
->caps
.function
| master_addr
;
548 out_param
= (u64
) slave
| slave_addr
;
551 return mlx4_cmd_imm(dev
, in_param
, &out_param
, size
, 0,
553 MLX4_CMD_TIME_CLASS_A
, MLX4_CMD_NATIVE
);
556 int mlx4_DMA_wrapper(struct mlx4_dev
*dev
, int slave
,
557 struct mlx4_vhcr
*vhcr
,
558 struct mlx4_cmd_mailbox
*inbox
,
559 struct mlx4_cmd_mailbox
*outbox
,
560 struct mlx4_cmd_info
*cmd
)
566 in_param
= cmd
->has_inbox
? (u64
) inbox
->dma
: vhcr
->in_param
;
567 out_param
= cmd
->has_outbox
? (u64
) outbox
->dma
: vhcr
->out_param
;
568 if (cmd
->encode_slave_id
) {
569 in_param
&= 0xffffffffffffff00ll
;
573 err
= __mlx4_cmd(dev
, in_param
, &out_param
, cmd
->out_is_imm
,
574 vhcr
->in_modifier
, vhcr
->op_modifier
, vhcr
->op
,
575 MLX4_CMD_TIME_CLASS_A
, MLX4_CMD_NATIVE
);
578 vhcr
->out_param
= out_param
;
583 static struct mlx4_cmd_info cmd_info
[] = {
585 .opcode
= MLX4_CMD_QUERY_FW
,
589 .encode_slave_id
= false,
594 .opcode
= MLX4_CMD_QUERY_HCA
,
598 .encode_slave_id
= false,
603 .opcode
= MLX4_CMD_QUERY_DEV_CAP
,
607 .encode_slave_id
= false,
612 .opcode
= MLX4_CMD_QUERY_FUNC_CAP
,
616 .encode_slave_id
= false,
618 .wrapper
= mlx4_QUERY_FUNC_CAP_wrapper
621 .opcode
= MLX4_CMD_QUERY_ADAPTER
,
625 .encode_slave_id
= false,
630 .opcode
= MLX4_CMD_INIT_PORT
,
634 .encode_slave_id
= false,
636 .wrapper
= mlx4_INIT_PORT_wrapper
639 .opcode
= MLX4_CMD_CLOSE_PORT
,
643 .encode_slave_id
= false,
645 .wrapper
= mlx4_CLOSE_PORT_wrapper
648 .opcode
= MLX4_CMD_QUERY_PORT
,
652 .encode_slave_id
= false,
654 .wrapper
= mlx4_QUERY_PORT_wrapper
657 .opcode
= MLX4_CMD_SET_PORT
,
661 .encode_slave_id
= false,
663 .wrapper
= mlx4_SET_PORT_wrapper
666 .opcode
= MLX4_CMD_MAP_EQ
,
670 .encode_slave_id
= false,
672 .wrapper
= mlx4_MAP_EQ_wrapper
675 .opcode
= MLX4_CMD_SW2HW_EQ
,
679 .encode_slave_id
= true,
681 .wrapper
= mlx4_SW2HW_EQ_wrapper
684 .opcode
= MLX4_CMD_HW_HEALTH_CHECK
,
688 .encode_slave_id
= false,
693 .opcode
= MLX4_CMD_NOP
,
697 .encode_slave_id
= false,
702 .opcode
= MLX4_CMD_ALLOC_RES
,
706 .encode_slave_id
= false,
708 .wrapper
= mlx4_ALLOC_RES_wrapper
711 .opcode
= MLX4_CMD_FREE_RES
,
715 .encode_slave_id
= false,
717 .wrapper
= mlx4_FREE_RES_wrapper
720 .opcode
= MLX4_CMD_SW2HW_MPT
,
724 .encode_slave_id
= true,
726 .wrapper
= mlx4_SW2HW_MPT_wrapper
729 .opcode
= MLX4_CMD_QUERY_MPT
,
733 .encode_slave_id
= false,
735 .wrapper
= mlx4_QUERY_MPT_wrapper
738 .opcode
= MLX4_CMD_HW2SW_MPT
,
742 .encode_slave_id
= false,
744 .wrapper
= mlx4_HW2SW_MPT_wrapper
747 .opcode
= MLX4_CMD_READ_MTT
,
751 .encode_slave_id
= false,
756 .opcode
= MLX4_CMD_WRITE_MTT
,
760 .encode_slave_id
= false,
762 .wrapper
= mlx4_WRITE_MTT_wrapper
765 .opcode
= MLX4_CMD_SYNC_TPT
,
769 .encode_slave_id
= false,
774 .opcode
= MLX4_CMD_HW2SW_EQ
,
778 .encode_slave_id
= true,
780 .wrapper
= mlx4_HW2SW_EQ_wrapper
783 .opcode
= MLX4_CMD_QUERY_EQ
,
787 .encode_slave_id
= true,
789 .wrapper
= mlx4_QUERY_EQ_wrapper
792 .opcode
= MLX4_CMD_SW2HW_CQ
,
796 .encode_slave_id
= true,
798 .wrapper
= mlx4_SW2HW_CQ_wrapper
801 .opcode
= MLX4_CMD_HW2SW_CQ
,
805 .encode_slave_id
= false,
807 .wrapper
= mlx4_HW2SW_CQ_wrapper
810 .opcode
= MLX4_CMD_QUERY_CQ
,
814 .encode_slave_id
= false,
816 .wrapper
= mlx4_QUERY_CQ_wrapper
819 .opcode
= MLX4_CMD_MODIFY_CQ
,
823 .encode_slave_id
= false,
825 .wrapper
= mlx4_MODIFY_CQ_wrapper
828 .opcode
= MLX4_CMD_SW2HW_SRQ
,
832 .encode_slave_id
= true,
834 .wrapper
= mlx4_SW2HW_SRQ_wrapper
837 .opcode
= MLX4_CMD_HW2SW_SRQ
,
841 .encode_slave_id
= false,
843 .wrapper
= mlx4_HW2SW_SRQ_wrapper
846 .opcode
= MLX4_CMD_QUERY_SRQ
,
850 .encode_slave_id
= false,
852 .wrapper
= mlx4_QUERY_SRQ_wrapper
855 .opcode
= MLX4_CMD_ARM_SRQ
,
859 .encode_slave_id
= false,
861 .wrapper
= mlx4_ARM_SRQ_wrapper
864 .opcode
= MLX4_CMD_RST2INIT_QP
,
868 .encode_slave_id
= true,
870 .wrapper
= mlx4_RST2INIT_QP_wrapper
873 .opcode
= MLX4_CMD_INIT2INIT_QP
,
877 .encode_slave_id
= false,
879 .wrapper
= mlx4_GEN_QP_wrapper
882 .opcode
= MLX4_CMD_INIT2RTR_QP
,
886 .encode_slave_id
= false,
888 .wrapper
= mlx4_INIT2RTR_QP_wrapper
891 .opcode
= MLX4_CMD_RTR2RTS_QP
,
895 .encode_slave_id
= false,
897 .wrapper
= mlx4_GEN_QP_wrapper
900 .opcode
= MLX4_CMD_RTS2RTS_QP
,
904 .encode_slave_id
= false,
906 .wrapper
= mlx4_GEN_QP_wrapper
909 .opcode
= MLX4_CMD_SQERR2RTS_QP
,
913 .encode_slave_id
= false,
915 .wrapper
= mlx4_GEN_QP_wrapper
918 .opcode
= MLX4_CMD_2ERR_QP
,
922 .encode_slave_id
= false,
924 .wrapper
= mlx4_GEN_QP_wrapper
927 .opcode
= MLX4_CMD_RTS2SQD_QP
,
931 .encode_slave_id
= false,
933 .wrapper
= mlx4_GEN_QP_wrapper
936 .opcode
= MLX4_CMD_SQD2SQD_QP
,
940 .encode_slave_id
= false,
942 .wrapper
= mlx4_GEN_QP_wrapper
945 .opcode
= MLX4_CMD_SQD2RTS_QP
,
949 .encode_slave_id
= false,
951 .wrapper
= mlx4_GEN_QP_wrapper
954 .opcode
= MLX4_CMD_2RST_QP
,
958 .encode_slave_id
= false,
960 .wrapper
= mlx4_2RST_QP_wrapper
963 .opcode
= MLX4_CMD_QUERY_QP
,
967 .encode_slave_id
= false,
969 .wrapper
= mlx4_GEN_QP_wrapper
972 .opcode
= MLX4_CMD_SUSPEND_QP
,
976 .encode_slave_id
= false,
978 .wrapper
= mlx4_GEN_QP_wrapper
981 .opcode
= MLX4_CMD_UNSUSPEND_QP
,
985 .encode_slave_id
= false,
987 .wrapper
= mlx4_GEN_QP_wrapper
990 .opcode
= MLX4_CMD_QUERY_IF_STAT
,
994 .encode_slave_id
= false,
996 .wrapper
= mlx4_QUERY_IF_STAT_wrapper
998 /* Native multicast commands are not available for guests */
1000 .opcode
= MLX4_CMD_QP_ATTACH
,
1002 .has_outbox
= false,
1003 .out_is_imm
= false,
1004 .encode_slave_id
= false,
1006 .wrapper
= mlx4_QP_ATTACH_wrapper
1009 .opcode
= MLX4_CMD_PROMISC
,
1011 .has_outbox
= false,
1012 .out_is_imm
= false,
1013 .encode_slave_id
= false,
1015 .wrapper
= mlx4_PROMISC_wrapper
1017 /* Ethernet specific commands */
1019 .opcode
= MLX4_CMD_SET_VLAN_FLTR
,
1021 .has_outbox
= false,
1022 .out_is_imm
= false,
1023 .encode_slave_id
= false,
1025 .wrapper
= mlx4_SET_VLAN_FLTR_wrapper
1028 .opcode
= MLX4_CMD_SET_MCAST_FLTR
,
1030 .has_outbox
= false,
1031 .out_is_imm
= false,
1032 .encode_slave_id
= false,
1034 .wrapper
= mlx4_SET_MCAST_FLTR_wrapper
1037 .opcode
= MLX4_CMD_DUMP_ETH_STATS
,
1040 .out_is_imm
= false,
1041 .encode_slave_id
= false,
1043 .wrapper
= mlx4_DUMP_ETH_STATS_wrapper
1046 .opcode
= MLX4_CMD_INFORM_FLR_DONE
,
1048 .has_outbox
= false,
1049 .out_is_imm
= false,
1050 .encode_slave_id
= false,
1056 static int mlx4_master_process_vhcr(struct mlx4_dev
*dev
, int slave
,
1057 struct mlx4_vhcr_cmd
*in_vhcr
)
1059 struct mlx4_priv
*priv
= mlx4_priv(dev
);
1060 struct mlx4_cmd_info
*cmd
= NULL
;
1061 struct mlx4_vhcr_cmd
*vhcr_cmd
= in_vhcr
? in_vhcr
: priv
->mfunc
.vhcr
;
1062 struct mlx4_vhcr
*vhcr
;
1063 struct mlx4_cmd_mailbox
*inbox
= NULL
;
1064 struct mlx4_cmd_mailbox
*outbox
= NULL
;
1070 /* Create sw representation of Virtual HCR */
1071 vhcr
= kzalloc(sizeof(struct mlx4_vhcr
), GFP_KERNEL
);
1075 /* DMA in the vHCR */
1077 ret
= mlx4_ACCESS_MEM(dev
, priv
->mfunc
.vhcr_dma
, slave
,
1078 priv
->mfunc
.master
.slave_state
[slave
].vhcr_dma
,
1079 ALIGN(sizeof(struct mlx4_vhcr_cmd
),
1080 MLX4_ACCESS_MEM_ALIGN
), 1);
1082 mlx4_err(dev
, "%s:Failed reading vhcr"
1083 "ret: 0x%x\n", __func__
, ret
);
1089 /* Fill SW VHCR fields */
1090 vhcr
->in_param
= be64_to_cpu(vhcr_cmd
->in_param
);
1091 vhcr
->out_param
= be64_to_cpu(vhcr_cmd
->out_param
);
1092 vhcr
->in_modifier
= be32_to_cpu(vhcr_cmd
->in_modifier
);
1093 vhcr
->token
= be16_to_cpu(vhcr_cmd
->token
);
1094 vhcr
->op
= be16_to_cpu(vhcr_cmd
->opcode
) & 0xfff;
1095 vhcr
->op_modifier
= (u8
) (be16_to_cpu(vhcr_cmd
->opcode
) >> 12);
1096 vhcr
->e_bit
= vhcr_cmd
->flags
& (1 << 6);
1098 /* Lookup command */
1099 for (i
= 0; i
< ARRAY_SIZE(cmd_info
); ++i
) {
1100 if (vhcr
->op
== cmd_info
[i
].opcode
) {
1106 mlx4_err(dev
, "Unknown command:0x%x accepted from slave:%d\n",
1108 vhcr_cmd
->status
= -EINVAL
;
1113 if (cmd
->has_inbox
) {
1114 vhcr
->in_param
&= INBOX_MASK
;
1115 inbox
= mlx4_alloc_cmd_mailbox(dev
);
1116 if (IS_ERR(inbox
)) {
1117 ret
= PTR_ERR(inbox
);
1122 ret
= mlx4_ACCESS_MEM(dev
, inbox
->dma
, slave
,
1124 MLX4_MAILBOX_SIZE
, 1);
1126 mlx4_err(dev
, "%s: Failed reading inbox (cmd:0x%x)\n",
1127 __func__
, cmd
->opcode
);
1132 /* Apply permission and bound checks if applicable */
1133 if (cmd
->verify
&& cmd
->verify(dev
, slave
, vhcr
, inbox
)) {
1134 mlx4_warn(dev
, "Command:0x%x from slave: %d failed protection "
1135 "checks for resource_id:%d\n", vhcr
->op
, slave
,
1137 vhcr_cmd
->status
= -EPERM
;
1141 /* Allocate outbox */
1142 if (cmd
->has_outbox
) {
1143 outbox
= mlx4_alloc_cmd_mailbox(dev
);
1144 if (IS_ERR(outbox
)) {
1145 ret
= PTR_ERR(outbox
);
1151 /* Execute the command! */
1153 vhcr_cmd
->status
= cmd
->wrapper(dev
, slave
, vhcr
, inbox
, outbox
,
1155 if (cmd
->out_is_imm
)
1156 vhcr_cmd
->out_param
= cpu_to_be64(vhcr
->out_param
);
1158 in_param
= cmd
->has_inbox
? (u64
) inbox
->dma
:
1160 out_param
= cmd
->has_outbox
? (u64
) outbox
->dma
:
1162 vhcr_cmd
->status
= __mlx4_cmd(dev
, in_param
, &out_param
,
1163 cmd
->out_is_imm
, vhcr
->in_modifier
,
1164 vhcr
->op_modifier
, vhcr
->op
,
1165 MLX4_CMD_TIME_CLASS_A
,
1168 if (vhcr_cmd
->status
) {
1169 mlx4_warn(dev
, "vhcr command:0x%x slave:%d failed with"
1170 " error:%d, status %d\n",
1171 vhcr
->op
, slave
, vhcr
->errno
,
1173 ret
= vhcr_cmd
->status
;
1177 if (cmd
->out_is_imm
) {
1178 vhcr
->out_param
= out_param
;
1179 vhcr_cmd
->out_param
= cpu_to_be64(vhcr
->out_param
);
1183 /* Write outbox if command completed successfully */
1184 if (cmd
->has_outbox
&& !vhcr
->errno
) {
1185 ret
= mlx4_ACCESS_MEM(dev
, outbox
->dma
, slave
,
1187 MLX4_MAILBOX_SIZE
, MLX4_CMD_WRAPPED
);
1189 mlx4_err(dev
, "%s:Failed writing outbox\n", __func__
);
1195 /* DMA back vhcr result */
1197 ret
= mlx4_ACCESS_MEM(dev
, priv
->mfunc
.vhcr_dma
, slave
,
1198 priv
->mfunc
.master
.slave_state
[slave
].vhcr_dma
,
1199 ALIGN(sizeof(struct mlx4_vhcr
),
1200 MLX4_ACCESS_MEM_ALIGN
),
1203 mlx4_err(dev
, "%s:Failed writing vhcr result\n",
1205 else if (vhcr
->e_bit
&&
1206 mlx4_GEN_EQE(dev
, slave
, &priv
->mfunc
.master
.cmd_eqe
))
1207 mlx4_warn(dev
, "Failed to generate command completion "
1208 "eqe for slave %d\n", slave
);
1213 mlx4_free_cmd_mailbox(dev
, inbox
);
1214 mlx4_free_cmd_mailbox(dev
, outbox
);
1218 static void mlx4_master_do_cmd(struct mlx4_dev
*dev
, int slave
, u8 cmd
,
1219 u16 param
, u8 toggle
)
1221 struct mlx4_priv
*priv
= mlx4_priv(dev
);
1222 struct mlx4_slave_state
*slave_state
= priv
->mfunc
.master
.slave_state
;
1224 u32 slave_status
= 0;
1225 u8 is_going_down
= 0;
1227 slave_state
[slave
].comm_toggle
^= 1;
1228 reply
= (u32
) slave_state
[slave
].comm_toggle
<< 31;
1229 if (toggle
!= slave_state
[slave
].comm_toggle
) {
1230 mlx4_warn(dev
, "Incorrect toggle %d from slave %d. *** MASTER"
1231 "STATE COMPROMISIED ***\n", toggle
, slave
);
1234 if (cmd
== MLX4_COMM_CMD_RESET
) {
1235 mlx4_warn(dev
, "Received reset from slave:%d\n", slave
);
1236 slave_state
[slave
].active
= false;
1237 /*check if we are in the middle of FLR process,
1238 if so return "retry" status to the slave*/
1239 if (MLX4_COMM_CMD_FLR
== slave_state
[slave
].last_cmd
) {
1240 slave_status
= MLX4_DELAY_RESET_SLAVE
;
1241 goto inform_slave_state
;
1244 /* write the version in the event field */
1245 reply
|= mlx4_comm_get_version();
1249 /*command from slave in the middle of FLR*/
1250 if (cmd
!= MLX4_COMM_CMD_RESET
&&
1251 MLX4_COMM_CMD_FLR
== slave_state
[slave
].last_cmd
) {
1252 mlx4_warn(dev
, "slave:%d is Trying to run cmd(0x%x) "
1253 "in the middle of FLR\n", slave
, cmd
);
1258 case MLX4_COMM_CMD_VHCR0
:
1259 if (slave_state
[slave
].last_cmd
!= MLX4_COMM_CMD_RESET
)
1261 slave_state
[slave
].vhcr_dma
= ((u64
) param
) << 48;
1262 priv
->mfunc
.master
.slave_state
[slave
].cookie
= 0;
1263 mutex_init(&priv
->mfunc
.master
.gen_eqe_mutex
[slave
]);
1265 case MLX4_COMM_CMD_VHCR1
:
1266 if (slave_state
[slave
].last_cmd
!= MLX4_COMM_CMD_VHCR0
)
1268 slave_state
[slave
].vhcr_dma
|= ((u64
) param
) << 32;
1270 case MLX4_COMM_CMD_VHCR2
:
1271 if (slave_state
[slave
].last_cmd
!= MLX4_COMM_CMD_VHCR1
)
1273 slave_state
[slave
].vhcr_dma
|= ((u64
) param
) << 16;
1275 case MLX4_COMM_CMD_VHCR_EN
:
1276 if (slave_state
[slave
].last_cmd
!= MLX4_COMM_CMD_VHCR2
)
1278 slave_state
[slave
].vhcr_dma
|= param
;
1279 slave_state
[slave
].active
= true;
1281 case MLX4_COMM_CMD_VHCR_POST
:
1282 if ((slave_state
[slave
].last_cmd
!= MLX4_COMM_CMD_VHCR_EN
) &&
1283 (slave_state
[slave
].last_cmd
!= MLX4_COMM_CMD_VHCR_POST
))
1285 down(&priv
->cmd
.slave_sem
);
1286 if (mlx4_master_process_vhcr(dev
, slave
, NULL
)) {
1287 mlx4_err(dev
, "Failed processing vhcr for slave:%d,"
1288 " reseting slave.\n", slave
);
1289 up(&priv
->cmd
.slave_sem
);
1292 up(&priv
->cmd
.slave_sem
);
1295 mlx4_warn(dev
, "Bad comm cmd:%d from slave:%d\n", cmd
, slave
);
1298 spin_lock(&priv
->mfunc
.master
.slave_state_lock
);
1299 if (!slave_state
[slave
].is_slave_going_down
)
1300 slave_state
[slave
].last_cmd
= cmd
;
1303 spin_unlock(&priv
->mfunc
.master
.slave_state_lock
);
1304 if (is_going_down
) {
1305 mlx4_warn(dev
, "Slave is going down aborting command(%d)"
1306 " executing from slave:%d\n",
1310 __raw_writel((__force u32
) cpu_to_be32(reply
),
1311 &priv
->mfunc
.comm
[slave
].slave_read
);
1317 /* cleanup any slave resources */
1318 mlx4_delete_all_resources_for_slave(dev
, slave
);
1319 spin_lock(&priv
->mfunc
.master
.slave_state_lock
);
1320 if (!slave_state
[slave
].is_slave_going_down
)
1321 slave_state
[slave
].last_cmd
= MLX4_COMM_CMD_RESET
;
1322 spin_unlock(&priv
->mfunc
.master
.slave_state_lock
);
1323 /*with slave in the middle of flr, no need to clean resources again.*/
1325 memset(&slave_state
[slave
].event_eq
, 0,
1326 sizeof(struct mlx4_slave_event_eq_info
));
1327 __raw_writel((__force u32
) cpu_to_be32(reply
),
1328 &priv
->mfunc
.comm
[slave
].slave_read
);
1332 /* master command processing */
1333 void mlx4_master_comm_channel(struct work_struct
*work
)
1335 struct mlx4_mfunc_master_ctx
*master
=
1337 struct mlx4_mfunc_master_ctx
,
1339 struct mlx4_mfunc
*mfunc
=
1340 container_of(master
, struct mlx4_mfunc
, master
);
1341 struct mlx4_priv
*priv
=
1342 container_of(mfunc
, struct mlx4_priv
, mfunc
);
1343 struct mlx4_dev
*dev
= &priv
->dev
;
1353 bit_vec
= master
->comm_arm_bit_vector
;
1354 for (i
= 0; i
< COMM_CHANNEL_BIT_ARRAY_SIZE
; i
++) {
1355 vec
= be32_to_cpu(bit_vec
[i
]);
1356 for (j
= 0; j
< 32; j
++) {
1357 if (!(vec
& (1 << j
)))
1360 slave
= (i
* 32) + j
;
1361 comm_cmd
= swab32(readl(
1362 &mfunc
->comm
[slave
].slave_write
));
1363 slt
= swab32(readl(&mfunc
->comm
[slave
].slave_read
))
1365 toggle
= comm_cmd
>> 31;
1366 if (toggle
!= slt
) {
1367 if (master
->slave_state
[slave
].comm_toggle
1369 printk(KERN_INFO
"slave %d out of sync."
1370 " read toggle %d, state toggle %d. "
1371 "Resynching.\n", slave
, slt
,
1372 master
->slave_state
[slave
].comm_toggle
);
1373 master
->slave_state
[slave
].comm_toggle
=
1376 mlx4_master_do_cmd(dev
, slave
,
1377 comm_cmd
>> 16 & 0xff,
1378 comm_cmd
& 0xffff, toggle
);
1384 if (reported
&& reported
!= served
)
1385 mlx4_warn(dev
, "Got command event with bitmask from %d slaves"
1386 " but %d were served\n",
1389 if (mlx4_ARM_COMM_CHANNEL(dev
))
1390 mlx4_warn(dev
, "Failed to arm comm channel events\n");
1393 int mlx4_cmd_init(struct mlx4_dev
*dev
)
1395 struct mlx4_priv
*priv
= mlx4_priv(dev
);
1397 mutex_init(&priv
->cmd
.hcr_mutex
);
1398 sema_init(&priv
->cmd
.poll_sem
, 1);
1399 priv
->cmd
.use_events
= 0;
1400 priv
->cmd
.toggle
= 1;
1402 priv
->cmd
.hcr
= NULL
;
1403 priv
->mfunc
.vhcr
= NULL
;
1405 if (!mlx4_is_slave(dev
)) {
1406 priv
->cmd
.hcr
= ioremap(pci_resource_start(dev
->pdev
, 0) +
1407 MLX4_HCR_BASE
, MLX4_HCR_SIZE
);
1408 if (!priv
->cmd
.hcr
) {
1409 mlx4_err(dev
, "Couldn't map command register.\n");
1414 priv
->cmd
.pool
= pci_pool_create("mlx4_cmd", dev
->pdev
,
1416 MLX4_MAILBOX_SIZE
, 0);
1417 if (!priv
->cmd
.pool
)
1423 if (!mlx4_is_slave(dev
))
1424 iounmap(priv
->cmd
.hcr
);
1428 void mlx4_cmd_cleanup(struct mlx4_dev
*dev
)
1430 struct mlx4_priv
*priv
= mlx4_priv(dev
);
1432 pci_pool_destroy(priv
->cmd
.pool
);
1434 if (!mlx4_is_slave(dev
))
1435 iounmap(priv
->cmd
.hcr
);
1439 * Switch to using events to issue FW commands (can only be called
1440 * after event queue for command events has been initialized).
1442 int mlx4_cmd_use_events(struct mlx4_dev
*dev
)
1444 struct mlx4_priv
*priv
= mlx4_priv(dev
);
1448 priv
->cmd
.context
= kmalloc(priv
->cmd
.max_cmds
*
1449 sizeof (struct mlx4_cmd_context
),
1451 if (!priv
->cmd
.context
)
1454 for (i
= 0; i
< priv
->cmd
.max_cmds
; ++i
) {
1455 priv
->cmd
.context
[i
].token
= i
;
1456 priv
->cmd
.context
[i
].next
= i
+ 1;
1459 priv
->cmd
.context
[priv
->cmd
.max_cmds
- 1].next
= -1;
1460 priv
->cmd
.free_head
= 0;
1462 sema_init(&priv
->cmd
.event_sem
, priv
->cmd
.max_cmds
);
1463 spin_lock_init(&priv
->cmd
.context_lock
);
1465 for (priv
->cmd
.token_mask
= 1;
1466 priv
->cmd
.token_mask
< priv
->cmd
.max_cmds
;
1467 priv
->cmd
.token_mask
<<= 1)
1469 --priv
->cmd
.token_mask
;
1471 down(&priv
->cmd
.poll_sem
);
1472 priv
->cmd
.use_events
= 1;
1478 * Switch back to polling (used when shutting down the device)
1480 void mlx4_cmd_use_polling(struct mlx4_dev
*dev
)
1482 struct mlx4_priv
*priv
= mlx4_priv(dev
);
1485 priv
->cmd
.use_events
= 0;
1487 for (i
= 0; i
< priv
->cmd
.max_cmds
; ++i
)
1488 down(&priv
->cmd
.event_sem
);
1490 kfree(priv
->cmd
.context
);
1492 up(&priv
->cmd
.poll_sem
);
1495 struct mlx4_cmd_mailbox
*mlx4_alloc_cmd_mailbox(struct mlx4_dev
*dev
)
1497 struct mlx4_cmd_mailbox
*mailbox
;
1499 mailbox
= kmalloc(sizeof *mailbox
, GFP_KERNEL
);
1501 return ERR_PTR(-ENOMEM
);
1503 mailbox
->buf
= pci_pool_alloc(mlx4_priv(dev
)->cmd
.pool
, GFP_KERNEL
,
1505 if (!mailbox
->buf
) {
1507 return ERR_PTR(-ENOMEM
);
1512 EXPORT_SYMBOL_GPL(mlx4_alloc_cmd_mailbox
);
1514 void mlx4_free_cmd_mailbox(struct mlx4_dev
*dev
,
1515 struct mlx4_cmd_mailbox
*mailbox
)
1520 pci_pool_free(mlx4_priv(dev
)->cmd
.pool
, mailbox
->buf
, mailbox
->dma
);
1523 EXPORT_SYMBOL_GPL(mlx4_free_cmd_mailbox
);
1525 u32
mlx4_comm_get_version(void)
1527 return ((u32
) CMD_CHAN_IF_REV
<< 8) | (u32
) CMD_CHAN_VER
;