1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* Copyright (c) 2022 Arm Limited.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
* SPDX-License-Identifier: GPL-2.0-only
*/
/****************************************************************************
* Includes
****************************************************************************/
#include "ethosu_capabilities.h"
#include "ethosu_device.h"
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
/****************************************************************************
* Defines
****************************************************************************/
#define CAPABILITIES_RESP_TIMEOUT_MS 2000
/****************************************************************************
* Functions
****************************************************************************/
static inline int ethosu_capabilities_send(struct ethosu_capabilities *cap)
{
return ethosu_mailbox_capabilities_request(&cap->edev->mailbox,
&cap->msg);
}
static void ethosu_capabilities_fail(struct ethosu_mailbox_msg *msg)
{
struct ethosu_capabilities *cap =
container_of(msg, typeof(*cap), msg);
if (completion_done(&cap->done))
return;
cap->errno = -EFAULT;
complete(&cap->done);
}
static int ethosu_capabilities_resend(struct ethosu_mailbox_msg *msg)
{
struct ethosu_capabilities *cap =
container_of(msg, typeof(*cap), msg);
/* Don't resend request if response has already been received */
if (completion_done(&cap->done))
return 0;
/* Resend request */
return ethosu_capabilities_send(cap);
}
void ethosu_capability_rsp(struct ethosu_device *edev,
struct ethosu_core_msg_capabilities_rsp *rsp)
{
int id = (int)rsp->user_arg;
struct ethosu_mailbox_msg *msg;
struct ethosu_capabilities *cap;
msg = ethosu_mailbox_find(&edev->mailbox, id);
if (IS_ERR(msg)) {
dev_warn(edev->dev,
"Id for capabilities msg not found. id=%d\n",
id);
return;
}
cap = container_of(msg, typeof(*cap), msg);
if (completion_done(&cap->done))
return;
cap->uapi->hw_id.version_status = rsp->version_status;
cap->uapi->hw_id.version_minor = rsp->version_minor;
cap->uapi->hw_id.version_major = rsp->version_major;
cap->uapi->hw_id.product_major = rsp->product_major;
cap->uapi->hw_id.arch_patch_rev = rsp->arch_patch_rev;
cap->uapi->hw_id.arch_minor_rev = rsp->arch_minor_rev;
cap->uapi->hw_id.arch_major_rev = rsp->arch_major_rev;
cap->uapi->driver_patch_rev = rsp->driver_patch_rev;
cap->uapi->driver_minor_rev = rsp->driver_minor_rev;
cap->uapi->driver_major_rev = rsp->driver_major_rev;
cap->uapi->hw_cfg.macs_per_cc = rsp->macs_per_cc;
cap->uapi->hw_cfg.cmd_stream_version = rsp->cmd_stream_version;
cap->uapi->hw_cfg.custom_dma = rsp->custom_dma;
cap->errno = 0;
complete(&cap->done);
}
int ethosu_capabilities_request(struct ethosu_device *edev,
struct ethosu_uapi_device_capabilities *uapi)
{
struct ethosu_capabilities *cap;
int ret;
int timeout;
cap = devm_kzalloc(edev->dev, sizeof(struct ethosu_capabilities),
GFP_KERNEL);
if (!cap)
return -ENOMEM;
cap->edev = edev;
cap->uapi = uapi;
init_completion(&cap->done);
cap->msg.fail = ethosu_capabilities_fail;
cap->msg.resend = ethosu_capabilities_resend;
ret = ethosu_mailbox_register(&cap->edev->mailbox, &cap->msg);
if (ret < 0)
goto kfree;
dev_info(edev->dev, "Capabilities create. Id=%d, handle=0x%p\n",
cap->msg.id, cap);
ret = ethosu_capabilities_send(cap);
if (0 != ret)
goto deregister;
/* Unlock the mutex before going to block on the condition */
mutex_unlock(&edev->mutex);
/* wait for response to arrive back */
timeout = wait_for_completion_timeout(&cap->done,
msecs_to_jiffies(
CAPABILITIES_RESP_TIMEOUT_MS));
/* take back the mutex before resuming to do anything */
mutex_lock(&edev->mutex);
if (0 == timeout) {
dev_warn(edev->dev, "Capabilities response timeout");
ret = -ETIME;
goto deregister;
}
if (cap->errno) {
ret = cap->errno;
goto deregister;
}
deregister:
ethosu_mailbox_deregister(&cap->edev->mailbox, &cap->msg);
kfree:
dev_info(cap->edev->dev, "Capabilities destroy. Id=%d, handle=0x%p\n",
cap->msg.id, cap);
devm_kfree(cap->edev->dev, cap);
return ret;
}
|
