2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/hardirq.h>
36 #include <linux/mlx5/driver.h>
37 #include <linux/mlx5/cmd.h>
38 #include <rdma/ib_verbs.h>
39 #include <linux/mlx5/cq.h>
40 #include "mlx5_core.h"
43 #define TASKLET_MAX_TIME 2
44 #define TASKLET_MAX_TIME_JIFFIES msecs_to_jiffies(TASKLET_MAX_TIME)
46 void mlx5_cq_tasklet_cb(unsigned long data
)
49 unsigned long end
= jiffies
+ TASKLET_MAX_TIME_JIFFIES
;
50 struct mlx5_eq_tasklet
*ctx
= (struct mlx5_eq_tasklet
*)data
;
51 struct mlx5_core_cq
*mcq
;
52 struct mlx5_core_cq
*temp
;
54 spin_lock_irqsave(&ctx
->lock
, flags
);
55 list_splice_tail_init(&ctx
->list
, &ctx
->process_list
);
56 spin_unlock_irqrestore(&ctx
->lock
, flags
);
58 list_for_each_entry_safe(mcq
, temp
, &ctx
->process_list
,
60 list_del_init(&mcq
->tasklet_ctx
.list
);
61 mcq
->tasklet_ctx
.comp(mcq
);
63 if (time_after(jiffies
, end
))
67 if (!list_empty(&ctx
->process_list
))
68 tasklet_schedule(&ctx
->task
);
71 static void mlx5_add_cq_to_tasklet(struct mlx5_core_cq
*cq
)
74 struct mlx5_eq_tasklet
*tasklet_ctx
= cq
->tasklet_ctx
.priv
;
76 spin_lock_irqsave(&tasklet_ctx
->lock
, flags
);
77 /* When migrating CQs between EQs will be implemented, please note
78 * that you need to sync this point. It is possible that
79 * while migrating a CQ, completions on the old EQs could
82 if (list_empty_careful(&cq
->tasklet_ctx
.list
)) {
84 list_add_tail(&cq
->tasklet_ctx
.list
, &tasklet_ctx
->list
);
86 spin_unlock_irqrestore(&tasklet_ctx
->lock
, flags
);
89 int mlx5_core_create_cq(struct mlx5_core_dev
*dev
, struct mlx5_core_cq
*cq
,
90 u32
*in
, int inlen
, u32
*out
, int outlen
)
92 int eqn
= MLX5_GET(cqc
, MLX5_ADDR_OF(create_cq_in
, in
, cq_context
), c_eqn
);
93 u32 dout
[MLX5_ST_SZ_DW(destroy_cq_out
)];
94 u32 din
[MLX5_ST_SZ_DW(destroy_cq_in
)];
95 struct mlx5_eq_comp
*eq
;
98 eq
= mlx5_eqn2comp_eq(dev
, eqn
);
102 memset(out
, 0, outlen
);
103 MLX5_SET(create_cq_in
, in
, opcode
, MLX5_CMD_OP_CREATE_CQ
);
104 err
= mlx5_cmd_exec(dev
, in
, inlen
, out
, outlen
);
108 cq
->cqn
= MLX5_GET(create_cq_out
, out
, cqn
);
112 cq
->uid
= MLX5_GET(create_cq_in
, in
, uid
);
113 refcount_set(&cq
->refcount
, 1);
114 init_completion(&cq
->free
);
116 cq
->comp
= mlx5_add_cq_to_tasklet
;
117 /* assuming CQ will be deleted before the EQ */
118 cq
->tasklet_ctx
.priv
= &eq
->tasklet_ctx
;
119 INIT_LIST_HEAD(&cq
->tasklet_ctx
.list
);
121 /* Add to comp EQ CQ tree to recv comp events */
122 err
= mlx5_eq_add_cq(&eq
->core
, cq
);
126 /* Add to async EQ CQ tree to recv async events */
127 err
= mlx5_eq_add_cq(mlx5_get_async_eq(dev
), cq
);
131 cq
->pid
= current
->pid
;
132 err
= mlx5_debug_cq_add(dev
, cq
);
134 mlx5_core_dbg(dev
, "failed adding CP 0x%x to debug file system\n",
137 cq
->uar
= dev
->priv
.uar
;
142 mlx5_eq_del_cq(&eq
->core
, cq
);
144 memset(din
, 0, sizeof(din
));
145 memset(dout
, 0, sizeof(dout
));
146 MLX5_SET(destroy_cq_in
, din
, opcode
, MLX5_CMD_OP_DESTROY_CQ
);
147 MLX5_SET(destroy_cq_in
, din
, cqn
, cq
->cqn
);
148 MLX5_SET(destroy_cq_in
, din
, uid
, cq
->uid
);
149 mlx5_cmd_exec(dev
, din
, sizeof(din
), dout
, sizeof(dout
));
152 EXPORT_SYMBOL(mlx5_core_create_cq
);
154 int mlx5_core_destroy_cq(struct mlx5_core_dev
*dev
, struct mlx5_core_cq
*cq
)
156 u32 out
[MLX5_ST_SZ_DW(destroy_cq_out
)] = {0};
157 u32 in
[MLX5_ST_SZ_DW(destroy_cq_in
)] = {0};
160 mlx5_eq_del_cq(mlx5_get_async_eq(dev
), cq
);
161 mlx5_eq_del_cq(&cq
->eq
->core
, cq
);
163 MLX5_SET(destroy_cq_in
, in
, opcode
, MLX5_CMD_OP_DESTROY_CQ
);
164 MLX5_SET(destroy_cq_in
, in
, cqn
, cq
->cqn
);
165 MLX5_SET(destroy_cq_in
, in
, uid
, cq
->uid
);
166 err
= mlx5_cmd_exec(dev
, in
, sizeof(in
), out
, sizeof(out
));
170 synchronize_irq(cq
->irqn
);
172 mlx5_debug_cq_remove(dev
, cq
);
174 wait_for_completion(&cq
->free
);
178 EXPORT_SYMBOL(mlx5_core_destroy_cq
);
180 int mlx5_core_query_cq(struct mlx5_core_dev
*dev
, struct mlx5_core_cq
*cq
,
181 u32
*out
, int outlen
)
183 u32 in
[MLX5_ST_SZ_DW(query_cq_in
)] = {0};
185 MLX5_SET(query_cq_in
, in
, opcode
, MLX5_CMD_OP_QUERY_CQ
);
186 MLX5_SET(query_cq_in
, in
, cqn
, cq
->cqn
);
187 return mlx5_cmd_exec(dev
, in
, sizeof(in
), out
, outlen
);
189 EXPORT_SYMBOL(mlx5_core_query_cq
);
191 int mlx5_core_modify_cq(struct mlx5_core_dev
*dev
, struct mlx5_core_cq
*cq
,
194 u32 out
[MLX5_ST_SZ_DW(modify_cq_out
)] = {0};
196 MLX5_SET(modify_cq_in
, in
, opcode
, MLX5_CMD_OP_MODIFY_CQ
);
197 MLX5_SET(modify_cq_in
, in
, uid
, cq
->uid
);
198 return mlx5_cmd_exec(dev
, in
, inlen
, out
, sizeof(out
));
200 EXPORT_SYMBOL(mlx5_core_modify_cq
);
202 int mlx5_core_modify_cq_moderation(struct mlx5_core_dev
*dev
,
203 struct mlx5_core_cq
*cq
,
207 u32 in
[MLX5_ST_SZ_DW(modify_cq_in
)] = {0};
210 MLX5_SET(modify_cq_in
, in
, cqn
, cq
->cqn
);
211 cqc
= MLX5_ADDR_OF(modify_cq_in
, in
, cq_context
);
212 MLX5_SET(cqc
, cqc
, cq_period
, cq_period
);
213 MLX5_SET(cqc
, cqc
, cq_max_count
, cq_max_count
);
214 MLX5_SET(modify_cq_in
, in
,
215 modify_field_select_resize_field_select
.modify_field_select
.modify_field_select
,
216 MLX5_CQ_MODIFY_PERIOD
| MLX5_CQ_MODIFY_COUNT
);
218 return mlx5_core_modify_cq(dev
, cq
, in
, sizeof(in
));
220 EXPORT_SYMBOL(mlx5_core_modify_cq_moderation
);