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160 lines
5.2 KiB
160 lines
5.2 KiB
4 years ago
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From c77866236e272b0520fba28dd04977c85c672167 Mon Sep 17 00:00:00 2001
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From: Alaa Hleihel <ahleihel@redhat.com>
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Date: Sun, 10 May 2020 14:52:07 -0400
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Subject: [PATCH 041/312] [netdrv] net/mlx5: Add wrappers for HyperV PCIe
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operations
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Message-id: <20200510145245.10054-45-ahleihel@redhat.com>
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Patchwork-id: 306586
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Patchwork-instance: patchwork
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O-Subject: [RHEL8.3 BZ 1789378 v2 44/82] net/mlx5: Add wrappers for HyperV PCIe operations
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Bugzilla: 1789378
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RH-Acked-by: Kamal Heib <kheib@redhat.com>
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RH-Acked-by: Jarod Wilson <jarod@redhat.com>
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RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
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RH-Acked-by: Jonathan Toppins <jtoppins@redhat.com>
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Bugzilla: http://bugzilla.redhat.com/1789378
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Upstream: v5.4-rc1
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commit 913d14e866573350de3adede3c90cefb81944b0c
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Author: Eran Ben Elisha <eranbe@mellanox.com>
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Date: Thu Aug 22 05:05:47 2019 +0000
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net/mlx5: Add wrappers for HyperV PCIe operations
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Add wrapper functions for HyperV PCIe read / write /
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block_invalidate_register operations. This will be used as an
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infrastructure in the downstream patch for software communication.
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This will be enabled by default if CONFIG_PCI_HYPERV_INTERFACE is set.
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Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
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Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Alaa Hleihel <ahleihel@redhat.com>
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Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
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---
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drivers/net/ethernet/mellanox/mlx5/core/Makefile | 1 +
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drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c | 64 ++++++++++++++++++++++++
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drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h | 22 ++++++++
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3 files changed, 87 insertions(+)
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create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c
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create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h
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diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Makefile b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
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index 3ac94d97cc24..d14a13557c0c 100644
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--- a/drivers/net/ethernet/mellanox/mlx5/core/Makefile
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+++ b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
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@@ -45,6 +45,7 @@ mlx5_core-$(CONFIG_MLX5_ESWITCH) += eswitch.o eswitch_offloads.o eswitch_offlo
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mlx5_core-$(CONFIG_MLX5_MPFS) += lib/mpfs.o
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mlx5_core-$(CONFIG_VXLAN) += lib/vxlan.o
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mlx5_core-$(CONFIG_PTP_1588_CLOCK) += lib/clock.o
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+mlx5_core-$(CONFIG_PCI_HYPERV_INTERFACE) += lib/hv.o
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#
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# Ipoib netdev
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diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c
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new file mode 100644
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index 000000000000..cf08d02703fb
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--- /dev/null
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+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c
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@@ -0,0 +1,64 @@
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+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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+// Copyright (c) 2018 Mellanox Technologies
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+
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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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+
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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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+
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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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+
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+ block_id = offset / HV_CONFIG_BLOCK_SIZE_MAX;
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+
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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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+
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+ /* Make sure len bytes were read successfully */
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+ if (read)
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+ rc |= !(len == bytes_returned);
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+
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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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+
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+ return 0;
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+}
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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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+
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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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+
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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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+
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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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diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h
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new file mode 100644
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index 000000000000..f9a45573f459
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--- /dev/null
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+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h
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@@ -0,0 +1,22 @@
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+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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+/* Copyright (c) 2019 Mellanox Technologies. */
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+
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+#ifndef __LIB_HV_H__
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+#define __LIB_HV_H__
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+
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+#if IS_ENABLED(CONFIG_PCI_HYPERV_INTERFACE)
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+
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+#include <linux/hyperv.h>
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+#include <linux/mlx5/driver.h>
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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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+int mlx5_hv_write_config(struct mlx5_core_dev *dev, void *buf, int len,
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+ int offset);
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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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+void mlx5_hv_unregister_invalidate(struct mlx5_core_dev *dev);
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+#endif
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+
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+#endif /* __LIB_HV_H__ */
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--
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2.13.6
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