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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
142 lines
3.7 KiB
C
142 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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