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![Adam Ford](/assets/img/avatar_default.png)
When enabling BLOCK_CACHE on devices with limited RAM during SPL,
some devices may not boot. This creates an option to enable
block caching in SPL by defaults off. It is dependent on SPL_BLK
Fixes: 46960ad6d0
("block: Have BLOCK_CACHE default to y in some cases")
Signed-off-by: Adam Ford <aford173@gmail.com>
669 lines
20 KiB
C
669 lines
20 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2000-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#ifndef BLK_H
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#define BLK_H
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#include <efi.h>
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#ifdef CONFIG_SYS_64BIT_LBA
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typedef uint64_t lbaint_t;
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#define LBAFlength "ll"
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#else
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typedef ulong lbaint_t;
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#define LBAFlength "l"
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#endif
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#define LBAF "%" LBAFlength "x"
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#define LBAFU "%" LBAFlength "u"
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/* Interface types: */
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enum if_type {
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IF_TYPE_UNKNOWN = 0,
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IF_TYPE_IDE,
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IF_TYPE_SCSI,
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IF_TYPE_ATAPI,
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IF_TYPE_USB,
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IF_TYPE_DOC,
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IF_TYPE_MMC,
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IF_TYPE_SD,
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IF_TYPE_SATA,
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IF_TYPE_HOST,
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IF_TYPE_NVME,
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IF_TYPE_EFI,
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IF_TYPE_COUNT, /* Number of interface types */
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};
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#define BLK_VEN_SIZE 40
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#define BLK_PRD_SIZE 20
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#define BLK_REV_SIZE 8
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/*
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* Identifies the partition table type (ie. MBR vs GPT GUID) signature
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*/
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enum sig_type {
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SIG_TYPE_NONE,
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SIG_TYPE_MBR,
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SIG_TYPE_GUID,
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SIG_TYPE_COUNT /* Number of signature types */
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};
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/*
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* With driver model (CONFIG_BLK) this is uclass platform data, accessible
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* with dev_get_uclass_platdata(dev)
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*/
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struct blk_desc {
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/*
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* TODO: With driver model we should be able to use the parent
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* device's uclass instead.
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*/
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enum if_type if_type; /* type of the interface */
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int devnum; /* device number */
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unsigned char part_type; /* partition type */
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unsigned char target; /* target SCSI ID */
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unsigned char lun; /* target LUN */
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unsigned char hwpart; /* HW partition, e.g. for eMMC */
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unsigned char type; /* device type */
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unsigned char removable; /* removable device */
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#ifdef CONFIG_LBA48
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/* device can use 48bit addr (ATA/ATAPI v7) */
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unsigned char lba48;
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#endif
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lbaint_t lba; /* number of blocks */
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unsigned long blksz; /* block size */
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int log2blksz; /* for convenience: log2(blksz) */
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char vendor[BLK_VEN_SIZE + 1]; /* device vendor string */
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char product[BLK_PRD_SIZE + 1]; /* device product number */
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char revision[BLK_REV_SIZE + 1]; /* firmware revision */
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enum sig_type sig_type; /* Partition table signature type */
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union {
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uint32_t mbr_sig; /* MBR integer signature */
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efi_guid_t guid_sig; /* GPT GUID Signature */
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};
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#if CONFIG_IS_ENABLED(BLK)
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/*
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* For now we have a few functions which take struct blk_desc as a
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* parameter. This field allows them to look up the associated
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* device. Once these functions are removed we can drop this field.
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*/
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struct udevice *bdev;
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#else
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unsigned long (*block_read)(struct blk_desc *block_dev,
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lbaint_t start,
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lbaint_t blkcnt,
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void *buffer);
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unsigned long (*block_write)(struct blk_desc *block_dev,
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lbaint_t start,
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lbaint_t blkcnt,
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const void *buffer);
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unsigned long (*block_erase)(struct blk_desc *block_dev,
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lbaint_t start,
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lbaint_t blkcnt);
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void *priv; /* driver private struct pointer */
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#endif
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};
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#define BLOCK_CNT(size, blk_desc) (PAD_COUNT(size, blk_desc->blksz))
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#define PAD_TO_BLOCKSIZE(size, blk_desc) \
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(PAD_SIZE(size, blk_desc->blksz))
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#if CONFIG_IS_ENABLED(BLOCK_CACHE)
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/**
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* blkcache_read() - attempt to read a set of blocks from cache
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*
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* @param iftype - IF_TYPE_x for type of device
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* @param dev - device index of particular type
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* @param start - starting block number
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* @param blkcnt - number of blocks to read
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* @param blksz - size in bytes of each block
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* @param buf - buffer to contain cached data
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*
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* @return - '1' if block returned from cache, '0' otherwise.
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*/
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int blkcache_read(int iftype, int dev,
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lbaint_t start, lbaint_t blkcnt,
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unsigned long blksz, void *buffer);
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/**
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* blkcache_fill() - make data read from a block device available
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* to the block cache
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*
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* @param iftype - IF_TYPE_x for type of device
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* @param dev - device index of particular type
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* @param start - starting block number
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* @param blkcnt - number of blocks available
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* @param blksz - size in bytes of each block
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* @param buf - buffer containing data to cache
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*
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*/
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void blkcache_fill(int iftype, int dev,
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lbaint_t start, lbaint_t blkcnt,
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unsigned long blksz, void const *buffer);
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/**
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* blkcache_invalidate() - discard the cache for a set of blocks
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* because of a write or device (re)initialization.
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*
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* @param iftype - IF_TYPE_x for type of device
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* @param dev - device index of particular type
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*/
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void blkcache_invalidate(int iftype, int dev);
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/**
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* blkcache_configure() - configure block cache
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*
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* @param blocks - maximum blocks per entry
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* @param entries - maximum entries in cache
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*/
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void blkcache_configure(unsigned blocks, unsigned entries);
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/*
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* statistics of the block cache
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*/
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struct block_cache_stats {
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unsigned hits;
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unsigned misses;
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unsigned entries; /* current entry count */
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unsigned max_blocks_per_entry;
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unsigned max_entries;
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};
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/**
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* get_blkcache_stats() - return statistics and reset
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*
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* @param stats - statistics are copied here
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*/
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void blkcache_stats(struct block_cache_stats *stats);
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#else
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static inline int blkcache_read(int iftype, int dev,
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lbaint_t start, lbaint_t blkcnt,
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unsigned long blksz, void *buffer)
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{
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return 0;
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}
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static inline void blkcache_fill(int iftype, int dev,
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lbaint_t start, lbaint_t blkcnt,
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unsigned long blksz, void const *buffer) {}
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static inline void blkcache_invalidate(int iftype, int dev) {}
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#endif
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#if CONFIG_IS_ENABLED(BLK)
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struct udevice;
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/* Operations on block devices */
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struct blk_ops {
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/**
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* read() - read from a block device
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*
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* @dev: Device to read from
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* @start: Start block number to read (0=first)
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* @blkcnt: Number of blocks to read
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* @buffer: Destination buffer for data read
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* @return number of blocks read, or -ve error number (see the
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* IS_ERR_VALUE() macro
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*/
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unsigned long (*read)(struct udevice *dev, lbaint_t start,
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lbaint_t blkcnt, void *buffer);
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/**
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* write() - write to a block device
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*
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* @dev: Device to write to
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* @start: Start block number to write (0=first)
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* @blkcnt: Number of blocks to write
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* @buffer: Source buffer for data to write
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* @return number of blocks written, or -ve error number (see the
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* IS_ERR_VALUE() macro
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*/
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unsigned long (*write)(struct udevice *dev, lbaint_t start,
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lbaint_t blkcnt, const void *buffer);
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/**
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* erase() - erase a section of a block device
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*
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* @dev: Device to (partially) erase
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* @start: Start block number to erase (0=first)
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* @blkcnt: Number of blocks to erase
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* @return number of blocks erased, or -ve error number (see the
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* IS_ERR_VALUE() macro
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*/
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unsigned long (*erase)(struct udevice *dev, lbaint_t start,
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lbaint_t blkcnt);
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/**
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* select_hwpart() - select a particular hardware partition
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*
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* Some devices (e.g. MMC) can support partitioning at the hardware
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* level. This is quite separate from the normal idea of
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* software-based partitions. MMC hardware partitions must be
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* explicitly selected. Once selected only the region of the device
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* covered by that partition is accessible.
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*
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* The MMC standard provides for two boot partitions (numbered 1 and 2),
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* rpmb (3), and up to 4 addition general-purpose partitions (4-7).
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*
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* @desc: Block device to update
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* @hwpart: Hardware partition number to select. 0 means the raw
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* device, 1 is the first partition, 2 is the second, etc.
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* @return 0 if OK, -ve on error
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*/
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int (*select_hwpart)(struct udevice *dev, int hwpart);
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};
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#define blk_get_ops(dev) ((struct blk_ops *)(dev)->driver->ops)
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/*
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* These functions should take struct udevice instead of struct blk_desc,
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* but this is convenient for migration to driver model. Add a 'd' prefix
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* to the function operations, so that blk_read(), etc. can be reserved for
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* functions with the correct arguments.
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*/
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unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt, void *buffer);
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unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt, const void *buffer);
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unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt);
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/**
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* blk_find_device() - Find a block device
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*
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* This function does not activate the device. The device will be returned
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* whether or not it is activated.
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*
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* @if_type: Interface type (enum if_type_t)
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* @devnum: Device number (specific to each interface type)
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* @devp: the device, if found
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* @return 0 if found, -ENODEV if no device found, or other -ve error value
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*/
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int blk_find_device(int if_type, int devnum, struct udevice **devp);
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/**
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* blk_get_device() - Find and probe a block device ready for use
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*
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* @if_type: Interface type (enum if_type_t)
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* @devnum: Device number (specific to each interface type)
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* @devp: the device, if found
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* @return 0 if found, -ENODEV if no device found, or other -ve error value
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*/
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int blk_get_device(int if_type, int devnum, struct udevice **devp);
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/**
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* blk_first_device() - Find the first device for a given interface
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*
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* The device is probed ready for use
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*
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* @devnum: Device number (specific to each interface type)
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* @devp: the device, if found
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* @return 0 if found, -ENODEV if no device, or other -ve error value
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*/
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int blk_first_device(int if_type, struct udevice **devp);
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/**
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* blk_next_device() - Find the next device for a given interface
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*
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* This can be called repeatedly after blk_first_device() to iterate through
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* all devices of the given interface type.
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*
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* The device is probed ready for use
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*
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* @devp: On entry, the previous device returned. On exit, the next
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* device, if found
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* @return 0 if found, -ENODEV if no device, or other -ve error value
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*/
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int blk_next_device(struct udevice **devp);
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/**
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* blk_create_device() - Create a new block device
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*
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* @parent: Parent of the new device
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* @drv_name: Driver name to use for the block device
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* @name: Name for the device
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* @if_type: Interface type (enum if_type_t)
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* @devnum: Device number, specific to the interface type, or -1 to
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* allocate the next available number
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* @blksz: Block size of the device in bytes (typically 512)
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* @lba: Total number of blocks of the device
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* @devp: the new device (which has not been probed)
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*/
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int blk_create_device(struct udevice *parent, const char *drv_name,
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const char *name, int if_type, int devnum, int blksz,
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lbaint_t lba, struct udevice **devp);
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/**
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* blk_create_devicef() - Create a new named block device
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*
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* @parent: Parent of the new device
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* @drv_name: Driver name to use for the block device
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* @name: Name for the device (parent name is prepended)
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* @if_type: Interface type (enum if_type_t)
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* @devnum: Device number, specific to the interface type, or -1 to
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* allocate the next available number
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* @blksz: Block size of the device in bytes (typically 512)
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* @lba: Total number of blocks of the device
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* @devp: the new device (which has not been probed)
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*/
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int blk_create_devicef(struct udevice *parent, const char *drv_name,
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const char *name, int if_type, int devnum, int blksz,
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lbaint_t lba, struct udevice **devp);
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/**
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* blk_prepare_device() - Prepare a block device for use
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*
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* This reads partition information from the device if supported.
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*
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* @dev: Device to prepare
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* @return 0 if ok, -ve on error
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*/
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int blk_prepare_device(struct udevice *dev);
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/**
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* blk_unbind_all() - Unbind all device of the given interface type
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*
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* The devices are removed and then unbound.
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*
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* @if_type: Interface type to unbind
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* @return 0 if OK, -ve on error
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*/
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int blk_unbind_all(int if_type);
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/**
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* blk_find_max_devnum() - find the maximum device number for an interface type
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*
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* Finds the last allocated device number for an interface type @if_type. The
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* next number is safe to use for a newly allocated device.
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*
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* @if_type: Interface type to scan
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* @return maximum device number found, or -ENODEV if none, or other -ve on
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* error
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*/
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int blk_find_max_devnum(enum if_type if_type);
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/**
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* blk_select_hwpart() - select a hardware partition
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*
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* Select a hardware partition if the device supports it (typically MMC does)
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*
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* @dev: Device to update
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* @hwpart: Partition number to select
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* @return 0 if OK, -ve on error
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*/
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int blk_select_hwpart(struct udevice *dev, int hwpart);
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/**
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* blk_get_from_parent() - obtain a block device by looking up its parent
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*
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* All devices with
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*/
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int blk_get_from_parent(struct udevice *parent, struct udevice **devp);
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#else
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#include <errno.h>
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/*
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* These functions should take struct udevice instead of struct blk_desc,
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* but this is convenient for migration to driver model. Add a 'd' prefix
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* to the function operations, so that blk_read(), etc. can be reserved for
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* functions with the correct arguments.
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*/
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static inline ulong blk_dread(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt, void *buffer)
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{
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ulong blks_read;
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if (blkcache_read(block_dev->if_type, block_dev->devnum,
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start, blkcnt, block_dev->blksz, buffer))
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return blkcnt;
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/*
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* We could check if block_read is NULL and return -ENOSYS. But this
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* bloats the code slightly (cause some board to fail to build), and
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* it would be an error to try an operation that does not exist.
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*/
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blks_read = block_dev->block_read(block_dev, start, blkcnt, buffer);
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if (blks_read == blkcnt)
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blkcache_fill(block_dev->if_type, block_dev->devnum,
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start, blkcnt, block_dev->blksz, buffer);
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return blks_read;
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}
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static inline ulong blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt, const void *buffer)
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{
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blkcache_invalidate(block_dev->if_type, block_dev->devnum);
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return block_dev->block_write(block_dev, start, blkcnt, buffer);
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}
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static inline ulong blk_derase(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt)
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{
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blkcache_invalidate(block_dev->if_type, block_dev->devnum);
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return block_dev->block_erase(block_dev, start, blkcnt);
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}
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/**
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* struct blk_driver - Driver for block interface types
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*
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* This provides access to the block devices for each interface type. One
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* driver should be provided using U_BOOT_LEGACY_BLK() for each interface
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* type that is to be supported.
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*
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* @if_typename: Interface type name
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* @if_type: Interface type
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* @max_devs: Maximum number of devices supported
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* @desc: Pointer to list of devices for this interface type,
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* or NULL to use @get_dev() instead
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*/
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struct blk_driver {
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const char *if_typename;
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enum if_type if_type;
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int max_devs;
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struct blk_desc *desc;
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/**
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* get_dev() - get a pointer to a block device given its number
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*
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* Each interface allocates its own devices and typically
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* struct blk_desc is contained with the interface's data structure.
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* There is no global numbering for block devices. This method allows
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* the device for an interface type to be obtained when @desc is NULL.
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*
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* @devnum: Device number (0 for first device on that interface,
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* 1 for second, etc.
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* @descp: Returns pointer to the block device on success
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* @return 0 if OK, -ve on error
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*/
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int (*get_dev)(int devnum, struct blk_desc **descp);
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/**
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* select_hwpart() - Select a hardware partition
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*
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|
* 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
|