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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2020 EPAM Systems Inc.
*/
#include <blk.h>
#include <common.h>
#include <dm.h>
#include <dm/device-internal.h>
#define DRV_NAME "pvblock"
#define DRV_NAME_BLK "pvblock_blk"
struct blkfront_dev {
char dummy;
};
static int init_blkfront(unsigned int devid, struct blkfront_dev *dev)
{
return 0;
}
static void shutdown_blkfront(struct blkfront_dev *dev)
{
}
ulong pvblock_blk_read(struct udevice *udev, lbaint_t blknr, lbaint_t blkcnt,
void *buffer)
{
return 0;
}
ulong pvblock_blk_write(struct udevice *udev, lbaint_t blknr, lbaint_t blkcnt,
const void *buffer)
{
return 0;
}
static int pvblock_blk_bind(struct udevice *udev)
{
return 0;
}
static int pvblock_blk_probe(struct udevice *udev)
{
struct blkfront_dev *blk_dev = dev_get_priv(udev);
int ret;
ret = init_blkfront(0, blk_dev);
if (ret < 0)
return ret;
return 0;
}
static int pvblock_blk_remove(struct udevice *udev)
{
struct blkfront_dev *blk_dev = dev_get_priv(udev);
shutdown_blkfront(blk_dev);
return 0;
}
static const struct blk_ops pvblock_blk_ops = {
.read = pvblock_blk_read,
.write = pvblock_blk_write,
};
U_BOOT_DRIVER(pvblock_blk) = {
.name = DRV_NAME_BLK,
.id = UCLASS_BLK,
.ops = &pvblock_blk_ops,
.bind = pvblock_blk_bind,
.probe = pvblock_blk_probe,
.remove = pvblock_blk_remove,
.priv_auto_alloc_size = sizeof(struct blkfront_dev),
.flags = DM_FLAG_OS_PREPARE,
};
/*******************************************************************************
* Para-virtual block device class
*******************************************************************************/
void pvblock_init(void)
{
struct driver_info info;
struct udevice *udev;
struct uclass *uc;
int ret;
/*
* At this point Xen drivers have already initialized,
* so we can instantiate the class driver and enumerate
* virtual block devices.
*/
info.name = DRV_NAME;
ret = device_bind_by_name(gd->dm_root, false, &info, &udev);
if (ret < 0)
printf("Failed to bind " DRV_NAME ", ret: %d\n", ret);
/* Bootstrap virtual block devices class driver */
ret = uclass_get(UCLASS_PVBLOCK, &uc);
if (ret)
return;
uclass_foreach_dev_probe(UCLASS_PVBLOCK, udev);
}
static int pvblock_probe(struct udevice *udev)
{
return 0;
}
U_BOOT_DRIVER(pvblock_drv) = {
.name = DRV_NAME,
.id = UCLASS_PVBLOCK,
.probe = pvblock_probe,
};
UCLASS_DRIVER(pvblock) = {
.name = DRV_NAME,
.id = UCLASS_PVBLOCK,
};
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