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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) Microsoft Corporation.
*
* Author:
* Haiyang Zhang <haiyangz@microsoft.com>
*
* This small module is a helper driver allows other drivers to
* have a common interface with the Hyper-V PCI frontend driver.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/hyperv.h>
struct hyperv_pci_block_ops hvpci_block_ops;
EXPORT_SYMBOL_GPL(hvpci_block_ops);
int hyperv_read_cfg_blk(struct pci_dev *dev, void *buf, unsigned int buf_len,
unsigned int block_id, unsigned int *bytes_returned)
{
if (!hvpci_block_ops.read_block)
return -EOPNOTSUPP;
return hvpci_block_ops.read_block(dev, buf, buf_len, block_id,
bytes_returned);
}
EXPORT_SYMBOL_GPL(hyperv_read_cfg_blk);
int hyperv_write_cfg_blk(struct pci_dev *dev, void *buf, unsigned int len,
unsigned int block_id)
{
if (!hvpci_block_ops.write_block)
return -EOPNOTSUPP;
return hvpci_block_ops.write_block(dev, buf, len, block_id);
}
EXPORT_SYMBOL_GPL(hyperv_write_cfg_blk);
int hyperv_reg_block_invalidate(struct pci_dev *dev, void *context,
void (*block_invalidate)(void *context,
u64 block_mask))
{
if (!hvpci_block_ops.reg_blk_invalidate)
return -EOPNOTSUPP;
return hvpci_block_ops.reg_blk_invalidate(dev, context,
block_invalidate);
}
EXPORT_SYMBOL_GPL(hyperv_reg_block_invalidate);
static void __exit exit_hv_pci_intf(void)
{
}
static int __init init_hv_pci_intf(void)
{
return 0;
}
module_init(init_hv_pci_intf);
module_exit(exit_hv_pci_intf);
MODULE_DESCRIPTION("Hyper-V PCI Interface");
MODULE_LICENSE("GPL v2");
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