+/* 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 BLK_H
+#include <efi.h>
+
#ifdef CONFIG_SYS_64BIT_LBA
typedef uint64_t lbaint_t;
#define LBAFlength "ll"
IF_TYPE_SD,
IF_TYPE_SATA,
IF_TYPE_HOST,
+ IF_TYPE_NVME,
+ IF_TYPE_EFI,
IF_TYPE_COUNT, /* Number of interface types */
};
+#define BLK_VEN_SIZE 40
+#define BLK_PRD_SIZE 20
+#define BLK_REV_SIZE 8
+
+/*
+ * Identifies the partition table type (ie. MBR vs GPT GUID) signature
+ */
+enum sig_type {
+ SIG_TYPE_NONE,
+ SIG_TYPE_MBR,
+ SIG_TYPE_GUID,
+
+ SIG_TYPE_COUNT /* Number of signature types */
+};
+
+/*
+ * With driver model (CONFIG_BLK) this is uclass platform data, accessible
+ * with dev_get_uclass_platdata(dev)
+ */
struct blk_desc {
+ /*
+ * TODO: With driver model we should be able to use the parent
+ * device's uclass instead.
+ */
enum if_type if_type; /* type of the interface */
- int dev; /* device number */
+ int devnum; /* device number */
unsigned char part_type; /* partition type */
unsigned char target; /* target SCSI ID */
unsigned char lun; /* target LUN */
lbaint_t lba; /* number of blocks */
unsigned long blksz; /* block size */
int log2blksz; /* for convenience: log2(blksz) */
- char vendor[40+1]; /* IDE model, SCSI Vendor */
- char product[20+1]; /* IDE Serial no, SCSI product */
- char revision[8+1]; /* firmware revision */
+ char vendor[BLK_VEN_SIZE + 1]; /* device vendor string */
+ char product[BLK_PRD_SIZE + 1]; /* device product number */
+ char revision[BLK_REV_SIZE + 1]; /* firmware revision */
+ enum sig_type sig_type; /* Partition table signature type */
+ union {
+ uint32_t mbr_sig; /* MBR integer signature */
+ efi_guid_t guid_sig; /* GPT GUID Signature */
+ };
+#if CONFIG_IS_ENABLED(BLK)
+ /*
+ * For now we have a few functions which take struct blk_desc as a
+ * parameter. This field allows them to look up the associated
+ * device. Once these functions are removed we can drop this field.
+ */
+ struct udevice *bdev;
+#else
unsigned long (*block_read)(struct blk_desc *block_dev,
lbaint_t start,
lbaint_t blkcnt,
lbaint_t start,
lbaint_t blkcnt);
void *priv; /* driver private struct pointer */
+#endif
};
#define BLOCK_CNT(size, blk_desc) (PAD_COUNT(size, blk_desc->blksz))
#define PAD_TO_BLOCKSIZE(size, blk_desc) \
(PAD_SIZE(size, blk_desc->blksz))
+#if CONFIG_IS_ENABLED(BLOCK_CACHE)
+/**
+ * blkcache_read() - attempt to read a set of blocks from cache
+ *
+ * @param iftype - IF_TYPE_x for type of device
+ * @param dev - device index of particular type
+ * @param start - starting block number
+ * @param blkcnt - number of blocks to read
+ * @param blksz - size in bytes of each block
+ * @param buf - buffer to contain cached data
+ *
+ * @return - '1' if block returned from cache, '0' otherwise.
+ */
+int blkcache_read(int iftype, int dev,
+ lbaint_t start, lbaint_t blkcnt,
+ unsigned long blksz, void *buffer);
+
+/**
+ * blkcache_fill() - make data read from a block device available
+ * to the block cache
+ *
+ * @param iftype - IF_TYPE_x for type of device
+ * @param dev - device index of particular type
+ * @param start - starting block number
+ * @param blkcnt - number of blocks available
+ * @param blksz - size in bytes of each block
+ * @param buf - buffer containing data to cache
+ *
+ */
+void blkcache_fill(int iftype, int dev,
+ lbaint_t start, lbaint_t blkcnt,
+ unsigned long blksz, void const *buffer);
+
+/**
+ * blkcache_invalidate() - discard the cache for a set of blocks
+ * because of a write or device (re)initialization.
+ *
+ * @param iftype - IF_TYPE_x for type of device
+ * @param dev - device index of particular type
+ */
+void blkcache_invalidate(int iftype, int dev);
+
+/**
+ * blkcache_configure() - configure block cache
+ *
+ * @param blocks - maximum blocks per entry
+ * @param entries - maximum entries in cache
+ */
+void blkcache_configure(unsigned blocks, unsigned entries);
+
+/*
+ * statistics of the block cache
+ */
+struct block_cache_stats {
+ unsigned hits;
+ unsigned misses;
+ unsigned entries; /* current entry count */
+ unsigned max_blocks_per_entry;
+ unsigned max_entries;
+};
+
+/**
+ * get_blkcache_stats() - return statistics and reset
+ *
+ * @param stats - statistics are copied here
+ */
+void blkcache_stats(struct block_cache_stats *stats);
+
+#else
+
+static inline int blkcache_read(int iftype, int dev,
+ lbaint_t start, lbaint_t blkcnt,
+ unsigned long blksz, void *buffer)
+{
+ return 0;
+}
+
+static inline void blkcache_fill(int iftype, int dev,
+ lbaint_t start, lbaint_t blkcnt,
+ unsigned long blksz, void const *buffer) {}
+
+static inline void blkcache_invalidate(int iftype, int dev) {}
+
+#endif
+
+#if CONFIG_IS_ENABLED(BLK)
+struct udevice;
+
+/* Operations on block devices */
+struct blk_ops {
+ /**
+ * read() - read from a block device
+ *
+ * @dev: Device to read from
+ * @start: Start block number to read (0=first)
+ * @blkcnt: Number of blocks to read
+ * @buffer: Destination buffer for data read
+ * @return number of blocks read, or -ve error number (see the
+ * IS_ERR_VALUE() macro
+ */
+ unsigned long (*read)(struct udevice *dev, lbaint_t start,
+ lbaint_t blkcnt, void *buffer);
+
+ /**
+ * write() - write to a block device
+ *
+ * @dev: Device to write to
+ * @start: Start block number to write (0=first)
+ * @blkcnt: Number of blocks to write
+ * @buffer: Source buffer for data to write
+ * @return number of blocks written, or -ve error number (see the
+ * IS_ERR_VALUE() macro
+ */
+ unsigned long (*write)(struct udevice *dev, lbaint_t start,
+ lbaint_t blkcnt, const void *buffer);
+
+ /**
+ * erase() - erase a section of a block device
+ *
+ * @dev: Device to (partially) erase
+ * @start: Start block number to erase (0=first)
+ * @blkcnt: Number of blocks to erase
+ * @return number of blocks erased, or -ve error number (see the
+ * IS_ERR_VALUE() macro
+ */
+ unsigned long (*erase)(struct udevice *dev, lbaint_t start,
+ lbaint_t blkcnt);
+
+ /**
+ * select_hwpart() - select a particular hardware partition
+ *
+ * Some devices (e.g. MMC) can support partitioning at the hardware
+ * level. This is quite separate from the normal idea of
+ * software-based partitions. MMC hardware partitions must be
+ * explicitly selected. Once selected only the region of the device
+ * covered by that partition is accessible.
+ *
+ * The MMC standard provides for two boot partitions (numbered 1 and 2),
+ * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
+ *
+ * @desc: Block device to update
+ * @hwpart: Hardware partition number to select. 0 means the raw
+ * device, 1 is the first partition, 2 is the second, etc.
+ * @return 0 if OK, -ve on error
+ */
+ int (*select_hwpart)(struct udevice *dev, int hwpart);
+};
+
+#define blk_get_ops(dev) ((struct blk_ops *)(dev)->driver->ops)
+
+/*
+ * These functions should take struct udevice instead of struct blk_desc,
+ * but this is convenient for migration to driver model. Add a 'd' prefix
+ * to the function operations, so that blk_read(), etc. can be reserved for
+ * functions with the correct arguments.
+ */
+unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start,
+ lbaint_t blkcnt, void *buffer);
+unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
+ lbaint_t blkcnt, const void *buffer);
+unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
+ lbaint_t blkcnt);
+
+/**
+ * blk_find_device() - Find a block device
+ *
+ * This function does not activate the device. The device will be returned
+ * whether or not it is activated.
+ *
+ * @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
+ */
+int blk_find_device(int if_type, int devnum, struct udevice **devp);
+
+/**
+ * blk_get_device() - Find and probe a block device ready for use
+ *
+ * @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
+ */
+int blk_get_device(int if_type, int devnum, struct udevice **devp);
+
+/**
+ * blk_first_device() - Find the first device for a given interface
+ *
+ * The device is probed ready for use
+ *
+ * @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
+ */
+int blk_first_device(int if_type, struct udevice **devp);
+
+/**
+ * blk_next_device() - Find the next device for a given interface
+ *
+ * This can be called repeatedly after blk_first_device() to iterate through
+ * all devices of the given interface type.
+ *
+ * The device is probed ready for use
+ *
+ * @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
+ */
+int blk_next_device(struct udevice **devp);
+
+/**
+ * blk_create_device() - Create a new block device
+ *
+ * @parent: Parent of the new device
+ * @drv_name: Driver name to use for the block device
+ * @name: Name for the device
+ * @if_type: Interface type (enum if_type_t)
+ * @devnum: Device number, specific to the interface type, or -1 to
+ * allocate the next available number
+ * @blksz: Block size of the device in bytes (typically 512)
+ * @lba: Total number of blocks of the device
+ * @devp: the new device (which has not been probed)
+ */
+int blk_create_device(struct udevice *parent, const char *drv_name,
+ const char *name, int if_type, int devnum, int blksz,
+ lbaint_t lba, struct udevice **devp);
+
+/**
+ * blk_create_devicef() - Create a new named block device
+ *
+ * @parent: Parent of the new device
+ * @drv_name: Driver name to use for the block device
+ * @name: Name for the device (parent name is prepended)
+ * @if_type: Interface type (enum if_type_t)
+ * @devnum: Device number, specific to the interface type, or -1 to
+ * allocate the next available number
+ * @blksz: Block size of the device in bytes (typically 512)
+ * @lba: Total number of blocks of the device
+ * @devp: the new device (which has not been probed)
+ */
+int blk_create_devicef(struct udevice *parent, const char *drv_name,
+ const char *name, int if_type, int devnum, int blksz,
+ lbaint_t lba, struct udevice **devp);
+
+/**
+ * blk_prepare_device() - Prepare a block device for use
+ *
+ * This reads partition information from the device if supported.
+ *
+ * @dev: Device to prepare
+ * @return 0 if ok, -ve on error
+ */
+int blk_prepare_device(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
+ */
+int blk_unbind_all(int if_type);
+
+/**
+ * blk_find_max_devnum() - find the maximum device number for an interface type
+ *
+ * Finds the last allocated device number for an interface type @if_type. The
+ * 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
+ * error
+ */
+int blk_find_max_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
+ */
+int blk_select_hwpart(struct udevice *dev, int hwpart);
+
+/**
+ * blk_get_from_parent() - obtain a block device by looking up its parent
+ *
+ * All devices with
+ */
+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>
+/*
+ * These functions should take struct udevice instead of struct blk_desc,
+ * but this is convenient for migration to driver model. Add a 'd' prefix
+ * to the function operations, so that blk_read(), etc. can be reserved for
+ * functions with the correct arguments.
+ */
+static inline ulong blk_dread(struct blk_desc *block_dev, lbaint_t start,
+ lbaint_t blkcnt, void *buffer)
+{
+ ulong blks_read;
+ if (blkcache_read(block_dev->if_type, block_dev->devnum,
+ start, blkcnt, block_dev->blksz, buffer))
+ return blkcnt;
+
+ /*
+ * We could check if block_read is NULL and return -ENOSYS. But this
+ * bloats the code slightly (cause some board to fail to build), and
+ * it would be an error to try an operation that does not exist.
+ */
+ blks_read = block_dev->block_read(block_dev, start, blkcnt, buffer);
+ if (blks_read == blkcnt)
+ blkcache_fill(block_dev->if_type, block_dev->devnum,
+ start, blkcnt, block_dev->blksz, buffer);
+
+ return blks_read;
+}
+
+static inline ulong blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
+ lbaint_t blkcnt, const void *buffer)
+{
+ blkcache_invalidate(block_dev->if_type, block_dev->devnum);
+ return block_dev->block_write(block_dev, start, blkcnt, buffer);
+}
+
+static inline ulong blk_derase(struct blk_desc *block_dev, lbaint_t start,
+ lbaint_t blkcnt)
+{
+ blkcache_invalidate(block_dev->if_type, block_dev->devnum);
+ return block_dev->block_erase(block_dev, start, blkcnt);
+}
+
+/**
+ * struct blk_driver - Driver for block interface types
+ *
+ * This provides access to the block devices for each interface type. One
+ * driver should be provided using U_BOOT_LEGACY_BLK() for each interface
+ * type that is to be supported.
+ *
+ * @if_typename: Interface type name
+ * @if_type: Interface type
+ * @max_devs: Maximum number of devices supported
+ * @desc: Pointer to list of devices for this interface type,
+ * or NULL to use @get_dev() instead
+ */
+struct blk_driver {
+ const char *if_typename;
+ enum if_type if_type;
+ int max_devs;
+ struct blk_desc *desc;
+ /**
+ * get_dev() - get a pointer to a block device given its number
+ *
+ * Each interface allocates its own devices and typically
+ * struct blk_desc is contained with the interface's data structure.
+ * There is no global numbering for block devices. This method allows
+ * the device for an interface type to be obtained when @desc is NULL.
+ *
+ * @devnum: Device number (0 for first device on that interface,
+ * 1 for second, etc.
+ * @descp: Returns pointer to the block device on success
+ * @return 0 if OK, -ve on error
+ */
+ int (*get_dev)(int devnum, struct blk_desc **descp);
+
+ /**
+ * select_hwpart() - Select a hardware partition
+ *
+ * Some devices (e.g. MMC) can support partitioning at the hardware
+ * level. This is quite separate from the normal idea of
+ * software-based partitions. MMC hardware partitions must be
+ * explicitly selected. Once selected only the region of the device
+ * covered by that partition is accessible.
+ *
+ * The MMC standard provides for two boot partitions (numbered 1 and 2),
+ * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
+ * Partition 0 is the main user-data partition.
+ *
+ * @desc: Block device descriptor
+ * @hwpart: Hardware partition number to select. 0 means the main
+ * user-data partition, 1 is the first partition, 2 is
+ * the second, etc.
+ * @return 0 if OK, other value for an error
+ */
+ int (*select_hwpart)(struct blk_desc *desc, int hwpart);
+};
+
+/*
+ * Declare a new U-Boot legacy block driver. New drivers should use driver
+ * model (UCLASS_BLK).
+ */
+#define U_BOOT_LEGACY_BLK(__name) \
+ ll_entry_declare(struct blk_driver, __name, blk_driver)
+
+struct blk_driver *blk_driver_lookup_type(int if_type);
+
+#endif /* !CONFIG_BLK */
+
+/**
+ * blk_get_devnum_by_typename() - Get a block device by type and number
+ *
+ * This looks through the available block devices of the given type, returning
+ * the one with the given @devnum.
+ *
+ * @if_type: Block device type
+ * @devnum: Device number
+ * @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);
+
+/**
+ * blk_get_devnum_by_type() - Get a block device by type name, and number
+ *
+ * This looks up the block device type based on @if_typename, then calls
+ * blk_get_devnum_by_type().
+ *
+ * @if_typename: Block device type name
+ * @devnum: Device number
+ * @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);
+
+/**
+ * blk_dselect_hwpart() - select a hardware partition
+ *
+ * This selects a hardware partition (such as is supported by MMC). The block
+ * device size may change as this effectively points the block device to a
+ * partition at the hardware level. See the select_hwpart() method above.
+ *
+ * @desc: Block device descriptor for the device to select
+ * @hwpart: Partition number to select
+ * @return 0 if OK, -ve on error
+ */
+int blk_dselect_hwpart(struct blk_desc *desc, int hwpart);
+
+/**
+ * blk_list_part() - list the partitions for block devices of a given type
+ *
+ * This looks up the partition type for each block device of type @if_type,
+ * then displays a list of partitions.
+ *
+ * @if_type: Block device type
+ * @return 0 if OK, -ENODEV if there is none of that type
+ */
+int blk_list_part(enum if_type if_type);
+
+/**
+ * blk_list_devices() - list the block devices of a given type
+ *
+ * This lists each block device of the type @if_type, showing the capacity
+ * as well as type-specific information.
+ *
+ * @if_type: Block device type
+ */
+void blk_list_devices(enum if_type if_type);
+
+/**
+ * blk_show_device() - show information about a given block device
+ *
+ * This shows the block device capacity as well as type-specific information.
+ *
+ * @if_type: Block device type
+ * @devnum: Device number
+ * @return 0 if OK, -ENODEV for invalid device number
+ */
+int blk_show_device(enum if_type if_type, int devnum);
+
+/**
+ * blk_print_device_num() - show information about a given block device
+ *
+ * This is similar to blk_show_device() but returns an error if the block
+ * device type is unknown.
+ *
+ * @if_type: Block device type
+ * @devnum: Device number
+ * @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);
+
+/**
+ * blk_print_part_devnum() - print the partition information for a device
+ *
+ * @if_type: Block device type
+ * @devnum: Device number
+ * @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);
+
+/**
+ * blk_read_devnum() - read blocks from a device
+ *
+ * @if_type: Block device type
+ * @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
+ */
+ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
+ lbaint_t blkcnt, void *buffer);
+
+/**
+ * blk_write_devnum() - write blocks to a device
+ *
+ * @if_type: Block device type
+ * @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
+ */
+ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
+ lbaint_t blkcnt, const void *buffer);
+
+/**
+ * blk_select_hwpart_devnum() - select a hardware partition
+ *
+ * This is similar to blk_dselect_hwpart() but it looks up the interface and
+ * device number.
+ *
+ * @if_type: Block device type
+ * @devnum: Device number
+ * @hwpart: Partition number to select
+ * @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
+ */
+const char *blk_get_if_type_name(enum if_type if_type);
+
+/**
+ * blk_common_cmd() - handle common commands with block devices
+ *
+ * @args: Number of arguments to the command (argv[0] is the command itself)
+ * @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
+ */
+int blk_common_cmd(int argc, char * const argv[], enum if_type if_type,
+ int *cur_devnump);
+
#endif