5  * SPDX-License-Identifier: Apache-2.0
19 LOG_MODULE_REGISTER(disk);
27 struct disk_info *disk_access_get_di(const char *name)  in disk_access_get_di()  argument
29 	struct disk_info *disk = NULL, *itr;  in disk_access_get_di()  local
30 	size_t name_len = strlen(name);  in disk_access_get_di()
40 		 * name is shorter than the mount point name.  in disk_access_get_di()
42 		if (strlen(itr->name) != name_len) {  in disk_access_get_di()
46 		/* Check for disk name match */  in disk_access_get_di()
47 		if (strncmp(name, itr->name, name_len) == 0) {  in disk_access_get_di()
48 			disk = itr;  in disk_access_get_di()
54 	return disk;  in disk_access_get_di()
59 	struct disk_info *disk = disk_access_get_di(pdrv);  in disk_access_init()  local
60 	int rc = -EINVAL;  in disk_access_init()
62 	if ((disk != NULL) && (disk->refcnt == 0U)) {  in disk_access_init()
63 		/* Disk has not been initialized, start it */  in disk_access_init()
64 		if ((disk->ops != NULL) && (disk->ops->init != NULL)) {  in disk_access_init()
65 			rc = disk->ops->init(disk);  in disk_access_init()
68 				disk->refcnt++;  in disk_access_init()
71 	} else if ((disk != NULL) && (disk->refcnt < UINT16_MAX)) {  in disk_access_init()
72 		/* Disk reference count is nonzero, simply increment it */  in disk_access_init()
73 		disk->refcnt++;  in disk_access_init()
82 	struct disk_info *disk = disk_access_get_di(pdrv);  in disk_access_status()  local
83 	int rc = -EINVAL;  in disk_access_status()
85 	if ((disk != NULL) && (disk->ops != NULL) &&  in disk_access_status()
86 				(disk->ops->status != NULL)) {  in disk_access_status()
87 		rc = disk->ops->status(disk);  in disk_access_status()
96 	struct disk_info *disk = disk_access_get_di(pdrv);  in disk_access_read()  local
97 	int rc = -EINVAL;  in disk_access_read()
99 	if ((disk != NULL) && (disk->ops != NULL) &&  in disk_access_read()
100 				(disk->ops->read != NULL)) {  in disk_access_read()
101 		rc = disk->ops->read(disk, data_buf, start_sector, num_sector);  in disk_access_read()
110 	struct disk_info *disk = disk_access_get_di(pdrv);  in disk_access_write()  local
111 	int rc = -EINVAL;  in disk_access_write()
113 	if ((disk != NULL) && (disk->ops != NULL) &&  in disk_access_write()
114 				(disk->ops->write != NULL)) {  in disk_access_write()
115 		rc = disk->ops->write(disk, data_buf, start_sector, num_sector);  in disk_access_write()
123 	struct disk_info *disk = disk_access_get_di(pdrv);  in disk_access_ioctl()  local
124 	int rc = -EINVAL;  in disk_access_ioctl()
126 	if ((disk != NULL) && (disk->ops != NULL) &&  in disk_access_ioctl()
127 				(disk->ops->ioctl != NULL)) {  in disk_access_ioctl()
130 			if (disk->refcnt == 0U) {  in disk_access_ioctl()
131 				rc = disk->ops->ioctl(disk, cmd, buf);  in disk_access_ioctl()
133 					disk->refcnt++;  in disk_access_ioctl()
135 			} else if (disk->refcnt < UINT16_MAX) {  in disk_access_ioctl()
136 				disk->refcnt++;  in disk_access_ioctl()
139 				LOG_ERR("Disk reference count at max value");  in disk_access_ioctl()
144 				/* Force deinit disk */  in disk_access_ioctl()
145 				disk->refcnt = 0U;  in disk_access_ioctl()
146 				disk->ops->ioctl(disk, cmd, buf);  in disk_access_ioctl()
148 			} else if (disk->refcnt == 1U) {  in disk_access_ioctl()
149 				rc = disk->ops->ioctl(disk, cmd, buf);  in disk_access_ioctl()
151 					disk->refcnt--;  in disk_access_ioctl()
153 			} else if (disk->refcnt > 0) {  in disk_access_ioctl()
154 				disk->refcnt--;  in disk_access_ioctl()
157 				LOG_WRN("Disk is already deinitialized");  in disk_access_ioctl()
161 			rc = disk->ops->ioctl(disk, cmd, buf);  in disk_access_ioctl()
168 int disk_access_register(struct disk_info *disk)  in disk_access_register()  argument
172 	if ((disk == NULL) || (disk->name == NULL)) {  in disk_access_register()
173 		LOG_ERR("invalid disk interface!!");  in disk_access_register()
174 		return -EINVAL;  in disk_access_register()
177 	if (disk_access_get_di(disk->name) != NULL) {  in disk_access_register()
178 		LOG_ERR("disk interface already registered!!");  in disk_access_register()
179 		return -EINVAL;  in disk_access_register()
183 	disk->refcnt = 0U;  in disk_access_register()
186 	/*  append to the disk list */  in disk_access_register()
187 	sys_dlist_append(&disk_access_list, &disk->node);  in disk_access_register()
188 	LOG_DBG("disk interface(%s) registered", disk->name);  in disk_access_register()
193 int disk_access_unregister(struct disk_info *disk)  in disk_access_unregister()  argument
197 	if ((disk == NULL) || (disk->name == NULL)) {  in disk_access_unregister()
198 		LOG_ERR("invalid disk interface!!");  in disk_access_unregister()
199 		return -EINVAL;  in disk_access_unregister()
202 	if (disk_access_get_di(disk->name) == NULL) {  in disk_access_unregister()
203 		LOG_ERR("disk interface not registered!!");  in disk_access_unregister()
204 		return -EINVAL;  in disk_access_unregister()
208 	/* remove disk node from the list */  in disk_access_unregister()
209 	sys_dlist_remove(&disk->node);  in disk_access_unregister()
211 	LOG_DBG("disk interface(%s) unregistered", disk->name);  in disk_access_unregister()