Commit 913d14e8 authored by Eran Ben Elisha's avatar Eran Ben Elisha Committed by David S. Miller
Browse files

net/mlx5: Add wrappers for HyperV PCIe operations 



Add wrapper functions for HyperV PCIe read / write /
block_invalidate_register operations.  This will be used as an
infrastructure in the downstream patch for software communication.

This will be enabled by default if CONFIG_PCI_HYPERV_INTERFACE is set.

Signed-off-by: default avatarEran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 348dd93e

drivers/net/ethernet/mellanox/mlx5/core/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ mlx5_core-$(CONFIG_MLX5_ESWITCH) += eswitch.o eswitch_offloads.o eswitch_offlo 
mlx5_core-$(CONFIG_MLX5_MPFS)      += lib/mpfs.o

mlx5_core-$(CONFIG_VXLAN)          += lib/vxlan.o

mlx5_core-$(CONFIG_PTP_1588_CLOCK) += lib/clock.o

mlx5_core-$(CONFIG_PCI_HYPERV_INTERFACE) += lib/hv.o



#

# Ipoib netdev

drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c

0 → 100644
+64 −0
Original line number Diff line number Diff line 
// 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);



	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);

}

drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h

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+22 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */

/* Copyright (c) 2019 Mellanox Technologies. */



#ifndef __LIB_HV_H__

#define __LIB_HV_H__



#if IS_ENABLED(CONFIG_PCI_HYPERV_INTERFACE)



#include <linux/hyperv.h>

#include <linux/mlx5/driver.h>



int mlx5_hv_read_config(struct mlx5_core_dev *dev, void *buf, int len,

			int offset);

int mlx5_hv_write_config(struct mlx5_core_dev *dev, void *buf, int len,

			 int offset);

int mlx5_hv_register_invalidate(struct mlx5_core_dev *dev, void *context,

				void (*block_invalidate)(void *context,

							 u64 block_mask));

void mlx5_hv_unregister_invalidate(struct mlx5_core_dev *dev);

#endif



#endif /* __LIB_HV_H__ */

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