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Thu, 22 Aug 2019 05:05:47 +0000 From: Haiyang Zhang To: "sashal@kernel.org" , "davem@davemloft.net" , "saeedm@mellanox.com" , "leon@kernel.org" , "eranbe@mellanox.com" , "lorenzo.pieralisi@arm.com" , "bhelgaas@google.com" , "linux-pci@vger.kernel.org" , "linux-hyperv@vger.kernel.org" , "netdev@vger.kernel.org" CC: Haiyang Zhang , KY Srinivasan , Stephen Hemminger , "linux-kernel@vger.kernel.org" Subject: [PATCH net-next,v4, 3/6] net/mlx5: Add wrappers for HyperV PCIe operations Thread-Topic: [PATCH net-next,v4, 3/6] net/mlx5: Add wrappers for HyperV PCIe operations Thread-Index: AQHVWKdC+LfkKjDVuEa1rKdzWh1oFA== Date: Thu, 22 Aug 2019 05:05:47 +0000 Message-ID: <1566450236-36757-4-git-send-email-haiyangz@microsoft.com> References: <1566450236-36757-1-git-send-email-haiyangz@microsoft.com> In-Reply-To: <1566450236-36757-1-git-send-email-haiyangz@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR14CA0039.namprd14.prod.outlook.com (2603:10b6:300:12b::25) To MN2PR21MB1248.namprd21.prod.outlook.com (2603:10b6:208:3b::33) authentication-results: spf=none (sender IP is ) smtp.mailfrom=lkmlhyz@microsoft.com; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: e6EfDSFjMJWc5CXfvhe7UnA4zoinHJwxFs5JR/zi0xyNzf9Mm4eI72TKe6rhsJ875YfhsOu2/tIjHOOcOonxjPMnEphutxr4WHqWK/BoL5dXLidgia8BIKZWVqPXiqB27Tf61OTUG23PIHjO3NEYwpXTUcU0nmeb4Fa1HbIcb3Rfsp9I4aTXOLaKgWryePNSqBe7l+MGQdSjoLuSQ/+19CQkyNUFaCO+HDiZbqsi9WTBV7IzuU2eDYUiIeeOUfTWhwV9mrq/EDJMi+t64Hnh+NgegXDNvsMJjy0d28TrjfpfAlOSkNvAEKo6oEStCIkKarjnYR9zsGCPvuotZIXl5Er0mFnwI8zZrpsp1boXtClFlyfyEwdU6bUcNTikWsirXFNJv7uadNFvfGtaY6y9xHCl9tgSJFxJ5xJrsYYTDxA= MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: d02e305d-e3af-4260-33bc-08d726be64bb X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Aug 2019 05:05:47.3945 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: qB4LYSMUczPlE/pQgjYddxDbu82GvF5vxkdJcL8I74erF1VCBU2SbkgPil6EHuvumJZA1eHDi4JXgvqO4A+jbA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR21MB1279 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Eran Ben Elisha 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: Eran Ben Elisha Signed-off-by: Saeed Mahameed Signed-off-by: Haiyang Zhang --- drivers/net/ethernet/mellanox/mlx5/core/Makefile | 1 + drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c | 64 ++++++++++++++++++++++++ drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h | 22 ++++++++ 3 files changed, 87 insertions(+) create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Makefile b/drivers/net/ethernet/mellanox/mlx5/core/Makefile index bcf3655..fd32a5b 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/Makefile +++ b/drivers/net/ethernet/mellanox/mlx5/core/Makefile @@ -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 diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c new file mode 100644 index 0000000..cf08d02 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +// Copyright (c) 2018 Mellanox Technologies + +#include +#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); +} diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h new file mode 100644 index 0000000..f9a4557 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/hv.h @@ -0,0 +1,22 @@ +/* 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 +#include + +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__ */