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// 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
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