-
Notifications
You must be signed in to change notification settings - Fork 579
/
nvme_disk.c
200 lines (162 loc) · 4.35 KB
/
nvme_disk.c
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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
/*
* SPDX-License-Identifier: Apache-2.0
* Copyright (c) 2022 Intel Corp.
*/
#include <zephyr/logging/log.h>
LOG_MODULE_DECLARE(nvme, CONFIG_NVME_LOG_LEVEL);
#include <zephyr/kernel.h>
#include <zephyr/sys/byteorder.h>
#include "nvme.h"
static int nvme_disk_init(struct disk_info *disk)
{
return 0;
}
static int nvme_disk_status(struct disk_info *disk)
{
return 0;
}
static int nvme_disk_read(struct disk_info *disk,
uint8_t *data_buf,
uint32_t start_sector,
uint32_t num_sector)
{
struct nvme_namespace *ns = CONTAINER_OF(disk->name,
struct nvme_namespace, name);
struct nvme_completion_poll_status status =
NVME_CPL_STATUS_POLL_INIT(status);
struct nvme_request *request;
uint32_t payload_size;
int ret = 0;
nvme_lock(disk->dev);
payload_size = num_sector * nvme_namespace_get_sector_size(ns);
request = nvme_allocate_request_vaddr((void *)data_buf, payload_size,
nvme_completion_poll_cb, &status);
if (request == NULL) {
ret = -ENOMEM;
goto out;
}
nvme_namespace_read_cmd(&request->cmd, ns->id,
start_sector, num_sector);
/* We use only the first ioq atm
* ToDo: use smp cpu id and use it to select ioq
*/
nvme_cmd_qpair_submit_request(ns->ctrlr->ioq, request);
nvme_completion_poll(&status);
if (nvme_cpl_status_is_error(&status)) {
LOG_WRN("Reading at sector %u (count %d) on disk %s failed",
start_sector, num_sector, ns->name);
ret = -EIO;
}
out:
nvme_unlock(disk->dev);
return ret;
}
static int nvme_disk_write(struct disk_info *disk,
const uint8_t *data_buf,
uint32_t start_sector,
uint32_t num_sector)
{
struct nvme_namespace *ns = CONTAINER_OF(disk->name,
struct nvme_namespace, name);
struct nvme_completion_poll_status status =
NVME_CPL_STATUS_POLL_INIT(status);
struct nvme_request *request;
uint32_t payload_size;
int ret = 0;
nvme_lock(disk->dev);
payload_size = num_sector * nvme_namespace_get_sector_size(ns);
request = nvme_allocate_request_vaddr((void *)data_buf, payload_size,
nvme_completion_poll_cb, &status);
if (request == NULL) {
ret = -ENOMEM;
goto out;
}
nvme_namespace_write_cmd(&request->cmd, ns->id,
start_sector, num_sector);
/* We use only the first ioq atm
* ToDo: use smp cpu id and use it to select ioq
*/
nvme_cmd_qpair_submit_request(ns->ctrlr->ioq, request);
nvme_completion_poll(&status);
if (nvme_cpl_status_is_error(&status)) {
LOG_WRN("Writing at sector %u (count %d) on disk %s failed",
start_sector, num_sector, ns->name);
ret = -EIO;
}
out:
nvme_unlock(disk->dev);
return ret;
}
static int nvme_disk_flush(struct nvme_namespace *ns)
{
struct nvme_completion_poll_status status =
NVME_CPL_STATUS_POLL_INIT(status);
struct nvme_request *request;
request = nvme_allocate_request_null(nvme_completion_poll_cb, &status);
if (request == NULL) {
return -ENOMEM;
}
nvme_namespace_flush_cmd(&request->cmd, ns->id);
/* We use only the first ioq
* ToDo: use smp cpu id and use it to select ioq
*/
nvme_cmd_qpair_submit_request(ns->ctrlr->ioq, request);
nvme_completion_poll(&status);
if (nvme_cpl_status_is_error(&status)) {
LOG_ERR("Flushing disk %s failed", ns->name);
return -EIO;
}
return 0;
}
static int nvme_disk_ioctl(struct disk_info *disk, uint8_t cmd, void *buff)
{
struct nvme_namespace *ns = CONTAINER_OF(disk->name,
struct nvme_namespace, name);
int ret = 0;
nvme_lock(disk->dev);
switch (cmd) {
case DISK_IOCTL_GET_SECTOR_COUNT:
if (!buff) {
ret = -EINVAL;
break;
}
*(uint32_t *)buff = nvme_namespace_get_num_sectors(ns);
break;
case DISK_IOCTL_GET_SECTOR_SIZE:
if (!buff) {
ret = -EINVAL;
break;
}
*(uint32_t *)buff = nvme_namespace_get_sector_size(ns);
break;
case DISK_IOCTL_GET_ERASE_BLOCK_SZ:
if (!buff) {
ret = -EINVAL;
break;
}
*(uint32_t *)buff = nvme_namespace_get_sector_size(ns);
break;
case DISK_IOCTL_CTRL_SYNC:
ret = nvme_disk_flush(ns);
break;
default:
ret = -EINVAL;
}
nvme_unlock(disk->dev);
return ret;
}
static const struct disk_operations nvme_disk_ops = {
.init = nvme_disk_init,
.status = nvme_disk_status,
.read = nvme_disk_read,
.write = nvme_disk_write,
.ioctl = nvme_disk_ioctl,
};
int nvme_namespace_disk_setup(struct nvme_namespace *ns,
struct disk_info *disk)
{
disk->name = ns->name;
disk->ops = &nvme_disk_ops;
disk->dev = ns->ctrlr->dev;
return disk_access_register(disk);
}