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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2018 Mellanox Technologies
#include <linux/hyperv.h>
#include "mlx5_core.h"
#include "lib/hv.h"
static int mlx5_hv_config_common(struct mlx5_core_dev *dev, void *buf, int len,
int offset, bool read)
{
int rc = -EOPNOTSUPP;
int bytes_returned;
int block_id;
if (offset % HV_CONFIG_BLOCK_SIZE_MAX || len != HV_CONFIG_BLOCK_SIZE_MAX)
return -EINVAL;
block_id = offset / HV_CONFIG_BLOCK_SIZE_MAX;
rc = read ?
hyperv_read_cfg_blk(dev->pdev, buf,
HV_CONFIG_BLOCK_SIZE_MAX, block_id,
&bytes_returned) :
hyperv_write_cfg_blk(dev->pdev, buf,
HV_CONFIG_BLOCK_SIZE_MAX, block_id);
/* Make sure len bytes were read successfully */
if (read && !rc && len != bytes_returned)
rc = -EIO;
if (rc) {
mlx5_core_err(dev, "Failed to %s hv config, err = %d, len = %d, offset = %d\n",
read ? "read" : "write", rc, len,
offset);
return rc;
}
return 0;
}
int mlx5_hv_read_config(struct mlx5_core_dev *dev, void *buf, int len,
int offset)
{
return mlx5_hv_config_common(dev, buf, len, offset, true);
}
int mlx5_hv_write_config(struct mlx5_core_dev *dev, void *buf, int len,
int offset)
{
return mlx5_hv_config_common(dev, buf, len, offset, false);
}
int mlx5_hv_register_invalidate(struct mlx5_core_dev *dev, void *context,
void (*block_invalidate)(void *context,
u64 block_mask))
{
return hyperv_reg_block_invalidate(dev->pdev, context,
block_invalidate);
}
void mlx5_hv_unregister_invalidate(struct mlx5_core_dev *dev)
{
hyperv_reg_block_invalidate(dev->pdev, NULL, NULL);
}
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