mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
348dd93e40
This interface driver is a helper driver allows other drivers to have a common interface with the Hyper-V PCI frontend driver. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
// 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");
|