u-boot/drivers/block/sandbox.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

238 lines
5.2 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2013 Henrik Nordstrom <henrik@henriknordstrom.net>
*/
#include <common.h>
#include <blk.h>
#include <dm.h>
#include <fdtdec.h>
#include <part.h>
#include <os.h>
#include <malloc.h>
#include <sandboxblockdev.h>
#include <linux/errno.h>
#include <dm/device-internal.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_BLK
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;
}
#endif
#ifdef CONFIG_BLK
static unsigned long host_block_read(struct udevice *dev,
unsigned long start, lbaint_t blkcnt,
void *buffer)
{
struct host_block_dev *host_dev = dev_get_priv(dev);
struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
#else
static unsigned long host_block_read(struct blk_desc *block_dev,
unsigned long start, lbaint_t blkcnt,
void *buffer)
{
int dev = block_dev->devnum;
struct host_block_dev *host_dev = find_host_device(dev);
if (!host_dev)
return -1;
#endif
if (os_lseek(host_dev->fd, start * block_dev->blksz, OS_SEEK_SET) ==
-1) {
printf("ERROR: Invalid block %lx\n", start);
return -1;
}
ssize_t len = os_read(host_dev->fd, buffer, blkcnt * block_dev->blksz);
if (len >= 0)
return len / block_dev->blksz;
return -1;
}
#ifdef CONFIG_BLK
static unsigned long host_block_write(struct udevice *dev,
unsigned long start, lbaint_t blkcnt,
const void *buffer)
{
struct host_block_dev *host_dev = dev_get_priv(dev);
struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
#else
static unsigned long host_block_write(struct blk_desc *block_dev,
unsigned long start, lbaint_t blkcnt,
const void *buffer)
{
int dev = block_dev->devnum;
struct host_block_dev *host_dev = find_host_device(dev);
#endif
if (os_lseek(host_dev->fd, start * block_dev->blksz, OS_SEEK_SET) ==
-1) {
printf("ERROR: Invalid block %lx\n", start);
return -1;
}
ssize_t len = os_write(host_dev->fd, buffer, blkcnt * block_dev->blksz);
if (len >= 0)
return len / block_dev->blksz;
return -1;
}
#ifdef CONFIG_BLK
int host_dev_bind(int devnum, char *filename)
{
struct host_block_dev *host_dev;
struct udevice *dev;
char dev_name[20], *str, *fname;
int ret, fd;
/* Remove and unbind the old device, if any */
ret = blk_get_device(IF_TYPE_HOST, devnum, &dev);
if (ret == 0) {
ret = device_remove(dev, DM_REMOVE_NORMAL);
if (ret)
return ret;
ret = device_unbind(dev);
if (ret)
return ret;
} else if (ret != -ENODEV) {
return ret;
}
if (!filename)
return 0;
snprintf(dev_name, sizeof(dev_name), "host%d", devnum);
str = strdup(dev_name);
if (!str)
return -ENOMEM;
fname = strdup(filename);
if (!fname) {
free(str);
return -ENOMEM;
}
fd = os_open(filename, OS_O_RDWR);
if (fd == -1) {
printf("Failed to access host backing file '%s'\n", filename);
ret = -ENOENT;
goto err;
}
ret = blk_create_device(gd->dm_root, "sandbox_host_blk", str,
IF_TYPE_HOST, devnum, 512,
os_lseek(fd, 0, OS_SEEK_END) / 512, &dev);
if (ret)
goto err_file;
ret = device_probe(dev);
if (ret) {
device_unbind(dev);
goto err_file;
}
host_dev = dev_get_priv(dev);
host_dev->fd = fd;
host_dev->filename = fname;
return blk_prepare_device(dev);
err_file:
os_close(fd);
err:
free(fname);
free(str);
return ret;
}
#else
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->devnum = dev;
blk_dev->part_type = PART_TYPE_UNKNOWN;
part_init(blk_dev);
return 0;
}
#endif
int host_get_dev_err(int devnum, struct blk_desc **blk_devp)
{
#ifdef CONFIG_BLK
struct udevice *dev;
int ret;
ret = blk_get_device(IF_TYPE_HOST, devnum, &dev);
if (ret)
return ret;
*blk_devp = dev_get_uclass_platdata(dev);
#else
struct host_block_dev *host_dev = find_host_device(devnum);
if (!host_dev)
return -ENODEV;
if (!host_dev->blk_dev.priv)
return -ENOENT;
*blk_devp = &host_dev->blk_dev;
#endif
return 0;
}
#ifdef CONFIG_BLK
static const struct blk_ops sandbox_host_blk_ops = {
.read = host_block_read,
.write = host_block_write,
};
U_BOOT_DRIVER(sandbox_host_blk) = {
.name = "sandbox_host_blk",
.id = UCLASS_BLK,
.ops = &sandbox_host_blk_ops,
.priv_auto_alloc_size = sizeof(struct host_block_dev),
};
#else
U_BOOT_LEGACY_BLK(sandbox_host) = {
.if_typename = "host",
.if_type = IF_TYPE_HOST,
.max_devs = CONFIG_HOST_MAX_DEVICES,
.get_dev = host_get_dev_err,
};
#endif