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