+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#ifndef BLK_H
#define LBAF "%" LBAFlength "x"
#define LBAFU "%" LBAFlength "u"
+struct udevice;
+
/* Interface types: */
enum if_type {
IF_TYPE_UNKNOWN = 0,
IF_TYPE_SD,
IF_TYPE_SATA,
IF_TYPE_HOST,
- IF_TYPE_SYSTEMACE,
IF_TYPE_NVME,
- IF_TYPE_EFI,
+ IF_TYPE_EFI_LOADER,
+ IF_TYPE_PVBLOCK,
+ IF_TYPE_VIRTIO,
+ IF_TYPE_EFI_MEDIA,
IF_TYPE_COUNT, /* Number of interface types */
};
#define BLK_PRD_SIZE 20
#define BLK_REV_SIZE 8
+#define PART_FORMAT_PCAT 0x1
+#define PART_FORMAT_GPT 0x2
+
/*
* Identifies the partition table type (ie. MBR vs GPT GUID) signature
*/
/*
* With driver model (CONFIG_BLK) this is uclass platform data, accessible
- * with dev_get_uclass_platdata(dev)
+ * with dev_get_uclass_plat(dev)
*/
struct blk_desc {
/*
#define PAD_TO_BLOCKSIZE(size, blk_desc) \
(PAD_SIZE(size, blk_desc->blksz))
-#ifdef CONFIG_BLOCK_CACHE
+#if CONFIG_IS_ENABLED(BLOCK_CACHE)
+
+/**
+ * blkcache_init() - initialize the block cache list pointers
+ */
+int blkcache_init(void);
+
/**
* blkcache_read() - attempt to read a set of blocks from cache
*
* @param blksz - size in bytes of each block
* @param buf - buffer to contain cached data
*
- * @return - '1' if block returned from cache, '0' otherwise.
+ * Return: - 1 if block returned from cache, 0 otherwise.
*/
int blkcache_read(int iftype, int dev,
lbaint_t start, lbaint_t blkcnt,
* @if_type: Interface type (enum if_type_t)
* @devnum: Device number (specific to each interface type)
* @devp: the device, if found
- * @return 0 if found, -ENODEV if no device found, or other -ve error value
+ * Return: 0 if found, -ENODEV if no device found, or other -ve error value
*/
int blk_find_device(int if_type, int devnum, struct udevice **devp);
* @if_type: Interface type (enum if_type_t)
* @devnum: Device number (specific to each interface type)
* @devp: the device, if found
- * @return 0 if found, -ENODEV if no device found, or other -ve error value
+ * Return: 0 if found, -ENODEV if no device found, or other -ve error value
*/
int blk_get_device(int if_type, int devnum, struct udevice **devp);
*
* @devnum: Device number (specific to each interface type)
* @devp: the device, if found
- * @return 0 if found, -ENODEV if no device, or other -ve error value
+ * Return: 0 if found, -ENODEV if no device, or other -ve error value
*/
int blk_first_device(int if_type, struct udevice **devp);
*
* @devp: On entry, the previous device returned. On exit, the next
* device, if found
- * @return 0 if found, -ENODEV if no device, or other -ve error value
+ * Return: 0 if found, -ENODEV if no device, or other -ve error value
*/
int blk_next_device(struct udevice **devp);
lbaint_t lba, struct udevice **devp);
/**
- * blk_prepare_device() - Prepare a block device for use
+ * blk_probe_or_unbind() - Try to probe
*
- * This reads partition information from the device if supported.
+ * Try to probe the device, primarily for enumerating partitions.
+ * If it fails, the device itself is unbound since it means that it won't
+ * work any more.
*
- * @dev: Device to prepare
- * @return 0 if ok, -ve on error
+ * @dev: The device to probe
+ * Return: 0 if OK, -ve on error
*/
-int blk_prepare_device(struct udevice *dev);
+int blk_probe_or_unbind(struct udevice *dev);
/**
* blk_unbind_all() - Unbind all device of the given interface type
* The devices are removed and then unbound.
*
* @if_type: Interface type to unbind
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
*/
int blk_unbind_all(int if_type);
* next number is safe to use for a newly allocated device.
*
* @if_type: Interface type to scan
- * @return maximum device number found, or -ENODEV if none, or other -ve on
+ * Return: maximum device number found, or -ENODEV if none, or other -ve on
* error
*/
int blk_find_max_devnum(enum if_type if_type);
/**
+ * blk_next_free_devnum() - get the next device number for an interface type
+ *
+ * Finds the next number that is safe to use for a newly allocated device for
+ * an interface type @if_type.
+ *
+ * @if_type: Interface type to scan
+ * Return: next device number safe to use, or -ve on error
+ */
+int blk_next_free_devnum(enum if_type if_type);
+
+/**
* blk_select_hwpart() - select a hardware partition
*
* Select a hardware partition if the device supports it (typically MMC does)
*
* @dev: Device to update
* @hwpart: Partition number to select
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
*/
int blk_select_hwpart(struct udevice *dev, int hwpart);
*/
int blk_get_from_parent(struct udevice *parent, struct udevice **devp);
+/**
+ * blk_get_by_device() - Get the block device descriptor for the given device
+ * @dev: Instance of a storage device
+ *
+ * Return: With block device descriptor on success , NULL if there is no such
+ * block device.
+ */
+struct blk_desc *blk_get_by_device(struct udevice *dev);
+
#else
#include <errno.h>
/*
*
* @if_type: Block device type
* @devnum: Device number
- * @return point to block device descriptor, or NULL if not found
+ * Return: point to block device descriptor, or NULL if not found
*/
struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum);
*
* @if_typename: Block device type name
* @devnum: Device number
- * @return point to block device descriptor, or NULL if not found
+ * Return: point to block device descriptor, or NULL if not found
*/
struct blk_desc *blk_get_devnum_by_typename(const char *if_typename,
int devnum);
*
* @desc: Block device descriptor for the device to select
* @hwpart: Partition number to select
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
*/
int blk_dselect_hwpart(struct blk_desc *desc, int hwpart);
* then displays a list of partitions.
*
* @if_type: Block device type
- * @return 0 if OK, -ENODEV if there is none of that type
+ * Return: 0 if OK, -ENODEV if there is none of that type
*/
int blk_list_part(enum if_type if_type);
*
* @if_type: Block device type
* @devnum: Device number
- * @return 0 if OK, -ENODEV for invalid device number
+ * Return: 0 if OK, -ENODEV for invalid device number
*/
int blk_show_device(enum if_type if_type, int devnum);
*
* @if_type: Block device type
* @devnum: Device number
- * @return 0 if OK, -ENODEV for invalid device number, -ENOENT if the block
+ * Return: 0 if OK, -ENODEV for invalid device number, -ENOENT if the block
* device is not connected
*/
int blk_print_device_num(enum if_type if_type, int devnum);
*
* @if_type: Block device type
* @devnum: Device number
- * @return 0 if OK, -ENOENT if the block device is not connected, -ENOSYS if
+ * Return: 0 if OK, -ENOENT if the block device is not connected, -ENOSYS if
* the interface type is not supported, other -ve on other error
*/
int blk_print_part_devnum(enum if_type if_type, int devnum);
* @devnum: Device number
* @blkcnt: Number of blocks to read
* @buffer: Address to write data to
- * @return number of blocks read, or -ve error number on error
+ * Return: number of blocks read, or -ve error number on error
*/
ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
lbaint_t blkcnt, void *buffer);
* @devnum: Device number
* @blkcnt: Number of blocks to write
* @buffer: Address to read data from
- * @return number of blocks written, or -ve error number on error
+ * Return: number of blocks written, or -ve error number on error
*/
ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
lbaint_t blkcnt, const void *buffer);
* @if_type: Block device type
* @devnum: Device number
* @hwpart: Partition number to select
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
*/
int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart);
* blk_get_if_type_name() - Get the name of an interface type
*
* @if_type: Interface type to check
- * @return name of interface, or NULL if none
+ * Return: name of interface, or NULL if none
*/
const char *blk_get_if_type_name(enum if_type if_type);
* @argv: Command arguments
* @if_type: Interface type
* @cur_devnump: Current device number for this interface type
- * @return 0 if OK, CMD_RET_ERROR on error
+ * Return: 0 if OK, CMD_RET_ERROR on error
*/
-int blk_common_cmd(int argc, char * const argv[], enum if_type if_type,
+int blk_common_cmd(int argc, char *const argv[], enum if_type if_type,
int *cur_devnump);
+enum blk_flag_t {
+ BLKF_FIXED = 1 << 0,
+ BLKF_REMOVABLE = 1 << 1,
+ BLKF_BOTH = BLKF_FIXED | BLKF_REMOVABLE,
+};
+
+/**
+ * blk_first_device_err() - Get the first block device
+ *
+ * The device returned is probed if necessary, and ready for use
+ *
+ * @flags: Indicates type of device to return
+ * @devp: Returns pointer to the first device in that uclass, or NULL if none
+ * Return: 0 if found, -ENODEV if not found, other -ve on error
+ */
+int blk_first_device_err(enum blk_flag_t flags, struct udevice **devp);
+
+/**
+ * blk_next_device_err() - Get the next block device
+ *
+ * The device returned is probed if necessary, and ready for use
+ *
+ * @flags: Indicates type of device to return
+ * @devp: On entry, pointer to device to lookup. On exit, returns pointer
+ * to the next device in the uclass if no error occurred, or -ENODEV if
+ * there is no next device.
+ * Return: 0 if found, -ENODEV if not found, other -ve on error
+ */
+int blk_next_device_err(enum blk_flag_t flags, struct udevice **devp);
+
+/**
+ * blk_foreach_probe() - Helper function to iteration through block devices
+ *
+ * This creates a for() loop which works through the available devices in
+ * a uclass in order from start to end. Devices are probed if necessary,
+ * and ready for use.
+ *
+ * @flags: Indicates type of device to return
+ * @dev: struct udevice * to hold the current device. Set to NULL when there
+ * are no more devices.
+ */
+#define blk_foreach_probe(flags, pos) \
+ for (int _ret = blk_first_device_err(flags, &(pos)); \
+ !_ret && pos; \
+ _ret = blk_next_device_err(flags, &(pos)))
+
+/**
+ * blk_count_devices() - count the number of devices of a particular type
+ *
+ * @flags: Indicates type of device to find
+ * Return: number of devices matching those flags
+ */
+int blk_count_devices(enum blk_flag_t flag);
+
#endif
projects / platform / kernel / u-boot.git / blobdiff