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https://github.com/u-boot/u-boot.git
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b254a8359e
The existing API for these functions is different from the rest of U-Boot, in that any error code must be obtained from the errno variable on failure. This variable is part of the C library, so accessing it outside of the special 'sandbox' shim-functions is not ideal. Adjust the API to return an error code, to avoid this. Update existing uses to check for any negative value, rather than just -1. Signed-off-by: Simon Glass <sjg@chromium.org>
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2013 Henrik Nordstrom <henrik@henriknordstrom.net>
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*/
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#include <blk.h>
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#include <dm.h>
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#include <fdtdec.h>
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#include <part.h>
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#include <os.h>
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#include <malloc.h>
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#include <sandbox_host.h>
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#include <asm/global_data.h>
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#include <dm/device_compat.h>
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#include <dm/device-internal.h>
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#include <linux/errno.h>
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DECLARE_GLOBAL_DATA_PTR;
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static unsigned long host_block_read(struct udevice *dev,
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unsigned long start, lbaint_t blkcnt,
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void *buffer)
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{
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struct blk_desc *desc = dev_get_uclass_plat(dev);
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struct udevice *host_dev = dev_get_parent(dev);
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struct host_sb_plat *plat = dev_get_plat(host_dev);
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if (os_lseek(plat->fd, start * desc->blksz, OS_SEEK_SET) < 0) {
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printf("ERROR: Invalid block %lx\n", start);
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return -1;
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}
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ssize_t len = os_read(plat->fd, buffer, blkcnt * desc->blksz);
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if (len >= 0)
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return len / desc->blksz;
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return -EIO;
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}
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static unsigned long host_block_write(struct udevice *dev,
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unsigned long start, lbaint_t blkcnt,
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const void *buffer)
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{
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struct blk_desc *desc = dev_get_uclass_plat(dev);
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struct udevice *host_dev = dev_get_parent(dev);
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struct host_sb_plat *plat = dev_get_plat(host_dev);
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if (os_lseek(plat->fd, start * desc->blksz, OS_SEEK_SET) < 0) {
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printf("ERROR: Invalid block %lx\n", start);
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return -1;
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}
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ssize_t len = os_write(plat->fd, buffer, blkcnt * desc->blksz);
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if (len >= 0)
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return len / desc->blksz;
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return -EIO;
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}
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static const struct blk_ops sandbox_host_blk_ops = {
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.read = host_block_read,
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.write = host_block_write,
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};
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U_BOOT_DRIVER(sandbox_host_blk) = {
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.name = "sandbox_host_blk",
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.id = UCLASS_BLK,
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.ops = &sandbox_host_blk_ops,
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};
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