blob: b3fbb2ad7283be0ce943e1c0d15f1caaeec2d72a [file] [log] [blame]
/*
* Copyright (c) 2018 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include <zephyr/types.h>
#include <misc/__assert.h>
#include <misc/util.h>
#include <init.h>
#include <disk_access.h>
#include <errno.h>
#include <device.h>
#define SYS_LOG_LEVEL CONFIG_SYS_LOG_DISK_LEVEL
#include <logging/sys_log.h>
/* list of mounted file systems */
static sys_dlist_t disk_access_list;
/* lock to protect storage layer registration */
static struct k_mutex mutex;
struct disk_info *disk_access_get_di(const char *name)
{
struct disk_info *disk = NULL, *itr;
size_t name_len = strlen(name);
sys_dnode_t *node;
k_mutex_lock(&mutex, K_FOREVER);
SYS_DLIST_FOR_EACH_NODE(&disk_access_list, node) {
itr = CONTAINER_OF(node, struct disk_info, node);
/*
* Move to next node if mount point length is
* shorter than longest_match match or if path
* name is shorter than the mount point name.
*/
if (strlen(itr->name) != name_len) {
continue;
}
/* Check for disk name match */
if (strncmp(name, itr->name, name_len) == 0) {
disk = itr;
break;
}
}
k_mutex_unlock(&mutex);
return disk;
}
int disk_access_init(const char *pdrv)
{
struct disk_info *disk = disk_access_get_di(pdrv);
int rc = -EINVAL;
if ((disk != NULL) || (disk->ops != NULL) ||
(disk->ops->init != NULL)) {
rc = disk->ops->init(disk);
}
return rc;
}
int disk_access_status(const char *pdrv)
{
struct disk_info *disk = disk_access_get_di(pdrv);
int rc = -EINVAL;
if ((disk != NULL) || (disk->ops != NULL) ||
(disk->ops->status != NULL)) {
rc = disk->ops->status(disk);
}
return rc;
}
int disk_access_read(const char *pdrv, u8_t *data_buf,
u32_t start_sector, u32_t num_sector)
{
struct disk_info *disk = disk_access_get_di(pdrv);
int rc = -EINVAL;
if ((disk != NULL) || (disk->ops != NULL) ||
(disk->ops->read != NULL)) {
rc = disk->ops->read(disk, data_buf, start_sector, num_sector);
}
return rc;
}
int disk_access_write(const char *pdrv, const u8_t *data_buf,
u32_t start_sector, u32_t num_sector)
{
struct disk_info *disk = disk_access_get_di(pdrv);
int rc = -EINVAL;
if ((disk != NULL) || (disk->ops != NULL) ||
(disk->ops->write != NULL)) {
rc = disk->ops->write(disk, data_buf, start_sector, num_sector);
}
return rc;
}
int disk_access_ioctl(const char *pdrv, u8_t cmd, void *buf)
{
struct disk_info *disk = disk_access_get_di(pdrv);
int rc = -EINVAL;
if ((disk != NULL) || (disk->ops != NULL) ||
(disk->ops->ioctl != NULL)) {
rc = disk->ops->ioctl(disk, cmd, buf);
}
return rc;
}
int disk_access_register(struct disk_info *disk)
{
int rc = 0;
k_mutex_lock(&mutex, K_FOREVER);
if ((disk == NULL) || (disk->name == NULL)) {
SYS_LOG_ERR("invalid disk interface!!");
rc = -EINVAL;
goto reg_err;
}
if (disk_access_get_di(disk->name) != NULL) {
SYS_LOG_ERR("disk interface already registered!!");
rc = -EINVAL;
goto reg_err;
}
/* append to the disk list */
sys_dlist_append(&disk_access_list, &disk->node);
SYS_LOG_DBG("disk interface(%s) registred", name);
reg_err:
k_mutex_unlock(&mutex);
return rc;
}
int disk_access_unregister(struct disk_info *disk)
{
int rc = 0;
k_mutex_lock(&mutex, K_FOREVER);
if ((disk == NULL) || (disk->name == NULL)) {
SYS_LOG_ERR("invalid disk interface!!");
rc = -EINVAL;
goto unreg_err;
}
if (disk_access_get_di(disk->name) == NULL) {
SYS_LOG_ERR("disk interface not registered!!");
rc = -EINVAL;
goto unreg_err;
}
/* remove disk node from the list */
sys_dlist_remove(&disk->node);
SYS_LOG_DBG("disk interface(%s) unregistred", name);
unreg_err:
k_mutex_unlock(&mutex);
return rc;
}
static int disk_init(struct device *dev)
{
ARG_UNUSED(dev);
k_mutex_init(&mutex);
sys_dlist_init(&disk_access_list);
return 0;
}
SYS_INIT(disk_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);