// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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// Copyright (c) 2018 Mellanox Technologies
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#include <linux/hyperv.h>
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#include "mlx5_core.h"
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#include "lib/hv.h"
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static int mlx5_hv_config_common(struct mlx5_core_dev *dev, void *buf, int len,
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int offset, bool read)
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{
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int rc = -EOPNOTSUPP;
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int bytes_returned;
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int block_id;
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if (offset % HV_CONFIG_BLOCK_SIZE_MAX || len != HV_CONFIG_BLOCK_SIZE_MAX)
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return -EINVAL;
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block_id = offset / HV_CONFIG_BLOCK_SIZE_MAX;
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rc = read ?
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hyperv_read_cfg_blk(dev->pdev, buf,
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HV_CONFIG_BLOCK_SIZE_MAX, block_id,
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&bytes_returned) :
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hyperv_write_cfg_blk(dev->pdev, buf,
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HV_CONFIG_BLOCK_SIZE_MAX, block_id);
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/* Make sure len bytes were read successfully */
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if (read && !rc && len != bytes_returned)
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rc = -EIO;
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if (rc) {
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mlx5_core_err(dev, "Failed to %s hv config, err = %d, len = %d, offset = %d\n",
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read ? "read" : "write", rc, len,
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offset);
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return rc;
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}
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return 0;
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}
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int mlx5_hv_read_config(struct mlx5_core_dev *dev, void *buf, int len,
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int offset)
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{
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return mlx5_hv_config_common(dev, buf, len, offset, true);
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}
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int mlx5_hv_write_config(struct mlx5_core_dev *dev, void *buf, int len,
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int offset)
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{
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return mlx5_hv_config_common(dev, buf, len, offset, false);
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}
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int mlx5_hv_register_invalidate(struct mlx5_core_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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return hyperv_reg_block_invalidate(dev->pdev, context,
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block_invalidate);
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}
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void mlx5_hv_unregister_invalidate(struct mlx5_core_dev *dev)
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{
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hyperv_reg_block_invalidate(dev->pdev, NULL, NULL);
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}
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