4101f68792
Use 'struct' instead of a typdef. Also since 'struct block_dev_desc' is long and causes 80-column violations, rename it to struct blk_desc. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Stephen Warren <swarren@nvidia.com>
129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
/*
|
|
* Copyright (C) 2013 Henrik Nordstrom <henrik@henriknordstrom.net>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <common.h>
|
|
#include <part.h>
|
|
#include <os.h>
|
|
#include <malloc.h>
|
|
#include <sandboxblockdev.h>
|
|
#include <asm/errno.h>
|
|
|
|
static struct host_block_dev host_devices[CONFIG_HOST_MAX_DEVICES];
|
|
|
|
static struct host_block_dev *find_host_device(int dev)
|
|
{
|
|
if (dev >= 0 && dev < CONFIG_HOST_MAX_DEVICES)
|
|
return &host_devices[dev];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static unsigned long host_block_read(struct blk_desc *block_dev,
|
|
unsigned long start, lbaint_t blkcnt,
|
|
void *buffer)
|
|
{
|
|
int dev = block_dev->dev;
|
|
struct host_block_dev *host_dev = find_host_device(dev);
|
|
|
|
if (!host_dev)
|
|
return -1;
|
|
if (os_lseek(host_dev->fd,
|
|
start * host_dev->blk_dev.blksz,
|
|
OS_SEEK_SET) == -1) {
|
|
printf("ERROR: Invalid position\n");
|
|
return -1;
|
|
}
|
|
ssize_t len = os_read(host_dev->fd, buffer,
|
|
blkcnt * host_dev->blk_dev.blksz);
|
|
if (len >= 0)
|
|
return len / host_dev->blk_dev.blksz;
|
|
return -1;
|
|
}
|
|
|
|
static unsigned long host_block_write(struct blk_desc *block_dev,
|
|
unsigned long start, lbaint_t blkcnt,
|
|
const void *buffer)
|
|
{
|
|
int dev = block_dev->dev;
|
|
struct host_block_dev *host_dev = find_host_device(dev);
|
|
if (os_lseek(host_dev->fd,
|
|
start * host_dev->blk_dev.blksz,
|
|
OS_SEEK_SET) == -1) {
|
|
printf("ERROR: Invalid position\n");
|
|
return -1;
|
|
}
|
|
ssize_t len = os_write(host_dev->fd, buffer, blkcnt *
|
|
host_dev->blk_dev.blksz);
|
|
if (len >= 0)
|
|
return len / host_dev->blk_dev.blksz;
|
|
return -1;
|
|
}
|
|
|
|
int host_dev_bind(int dev, char *filename)
|
|
{
|
|
struct host_block_dev *host_dev = find_host_device(dev);
|
|
|
|
if (!host_dev)
|
|
return -1;
|
|
if (host_dev->blk_dev.priv) {
|
|
os_close(host_dev->fd);
|
|
host_dev->blk_dev.priv = NULL;
|
|
}
|
|
if (host_dev->filename)
|
|
free(host_dev->filename);
|
|
if (filename && *filename) {
|
|
host_dev->filename = strdup(filename);
|
|
} else {
|
|
host_dev->filename = NULL;
|
|
return 0;
|
|
}
|
|
|
|
host_dev->fd = os_open(host_dev->filename, OS_O_RDWR);
|
|
if (host_dev->fd == -1) {
|
|
printf("Failed to access host backing file '%s'\n",
|
|
host_dev->filename);
|
|
return 1;
|
|
}
|
|
|
|
struct blk_desc *blk_dev = &host_dev->blk_dev;
|
|
blk_dev->if_type = IF_TYPE_HOST;
|
|
blk_dev->priv = host_dev;
|
|
blk_dev->blksz = 512;
|
|
blk_dev->lba = os_lseek(host_dev->fd, 0, OS_SEEK_END) / blk_dev->blksz;
|
|
blk_dev->block_read = host_block_read;
|
|
blk_dev->block_write = host_block_write;
|
|
blk_dev->dev = dev;
|
|
blk_dev->part_type = PART_TYPE_UNKNOWN;
|
|
init_part(blk_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int host_get_dev_err(int dev, struct blk_desc **blk_devp)
|
|
{
|
|
struct host_block_dev *host_dev = find_host_device(dev);
|
|
|
|
if (!host_dev)
|
|
return -ENODEV;
|
|
|
|
if (!host_dev->blk_dev.priv)
|
|
return -ENOENT;
|
|
|
|
*blk_devp = &host_dev->blk_dev;
|
|
return 0;
|
|
}
|
|
|
|
struct blk_desc *host_get_dev(int dev)
|
|
{
|
|
struct blk_desc *blk_dev;
|
|
|
|
if (host_get_dev_err(dev, &blk_dev))
|
|
return NULL;
|
|
|
|
return blk_dev;
|
|
}
|