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804f7d63f2
Move part_create_block_devices() to blk uclass and unexpose the function. This can now be internal to the block uclass. Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Software partition device (UCLASS_PARTITION)
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*
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* Copyright (c) 2021 Linaro Limited
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* Author: AKASHI Takahiro
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*/
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#define LOG_CATEGORY UCLASS_PARTITION
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#include <common.h>
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#include <blk.h>
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#include <dm.h>
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#include <log.h>
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#include <part.h>
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#include <vsprintf.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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/**
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* disk_blk_part_validate() - Check whether access to partition is within limits
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*
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* @dev: Device (partition udevice)
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* @start: Start block for the access(from start of partition)
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* @blkcnt: Number of blocks to access (within the partition)
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* @return 0 on valid block range, or -ve on error.
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*/
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static int disk_blk_part_validate(struct udevice *dev, lbaint_t start, lbaint_t blkcnt)
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{
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struct disk_part *part = dev_get_uclass_plat(dev);
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if (device_get_uclass_id(dev) != UCLASS_PARTITION)
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return -ENOSYS;
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if (start >= part->gpt_part_info.size)
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return -E2BIG;
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if ((start + blkcnt) > part->gpt_part_info.size)
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return -ERANGE;
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return 0;
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}
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/**
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* disk_blk_part_offset() - Compute offset from start of block device
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*
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* @dev: Device (partition udevice)
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* @start: Start block for the access (from start of partition)
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* @return Start block for the access (from start of block device)
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*/
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static lbaint_t disk_blk_part_offset(struct udevice *dev, lbaint_t start)
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{
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struct disk_part *part = dev_get_uclass_plat(dev);
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return start + part->gpt_part_info.start;
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}
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/*
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* BLOCK IO APIs
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*/
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/**
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* disk_blk_read() - Read from a block device partition
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*
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* @dev: Device to read from (partition udevice)
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* @start: Start block for the read (from start of partition)
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* @blkcnt: Number of blocks to read (within the partition)
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* @buffer: Place to put the data
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* @return number of blocks read (which may be less than @blkcnt),
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* or -ve on error. This never returns 0 unless @blkcnt is 0
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*/
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unsigned long disk_blk_read(struct udevice *dev, lbaint_t start,
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lbaint_t blkcnt, void *buffer)
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{
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int ret = disk_blk_part_validate(dev, start, blkcnt);
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if (ret)
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return ret;
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return blk_read(dev_get_parent(dev), disk_blk_part_offset(dev, start),
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blkcnt, buffer);
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}
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/**
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* disk_blk_write() - Write to a block device
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*
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* @dev: Device to write to (partition udevice)
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* @start: Start block for the write (from start of partition)
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* @blkcnt: Number of blocks to write (within the partition)
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* @buffer: Data to write
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* @return number of blocks written (which may be less than @blkcnt),
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* or -ve on error. This never returns 0 unless @blkcnt is 0
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*/
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unsigned long disk_blk_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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int ret = disk_blk_part_validate(dev, start, blkcnt);
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if (ret)
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return ret;
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return blk_write(dev_get_parent(dev), disk_blk_part_offset(dev, start),
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blkcnt, buffer);
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}
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/**
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* disk_blk_erase() - Erase part of a block device
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*
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* @dev: Device to erase (partition udevice)
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* @start: Start block for the erase (from start of partition)
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* @blkcnt: Number of blocks to erase (within the partition)
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* @return number of blocks erased (which may be less than @blkcnt),
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* or -ve on error. This never returns 0 unless @blkcnt is 0
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*/
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unsigned long disk_blk_erase(struct udevice *dev, lbaint_t start,
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lbaint_t blkcnt)
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{
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int ret = disk_blk_part_validate(dev, start, blkcnt);
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if (ret)
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return ret;
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return blk_erase(dev_get_parent(dev), disk_blk_part_offset(dev, start),
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blkcnt);
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}
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UCLASS_DRIVER(partition) = {
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.id = UCLASS_PARTITION,
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.per_device_plat_auto = sizeof(struct disk_part),
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.name = "partition",
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};
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static const struct blk_ops blk_part_ops = {
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.read = disk_blk_read,
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.write = disk_blk_write,
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.erase = disk_blk_erase,
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};
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U_BOOT_DRIVER(blk_partition) = {
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.name = "blk_partition",
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.id = UCLASS_PARTITION,
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.ops = &blk_part_ops,
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};
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