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From: Leon Romanovsky <leon@kernel.org>
To: Doug Ledford <dledford@redhat.com>, Jason Gunthorpe <jgg@mellanox.com>
Cc: Leon Romanovsky <leonro@mellanox.com>,
	RDMA mailing list <linux-rdma@vger.kernel.org>,
	Shahaf Shuler <shahafs@mellanox.com>,
	Yishai Hadas <yishaih@mellanox.com>,
	Saeed Mahameed <saeedm@mellanox.com>,
	linux-netdev <netdev@vger.kernel.org>
Subject: [PATCH mlx5-next 2/5] net/mlx5: Expose vDPA emulation device capabilities
Date: Thu, 12 Dec 2019 13:09:25 +0200
Message-ID: <20191212110928.334995-3-leon@kernel.org> (raw)
In-Reply-To: <20191212110928.334995-1-leon@kernel.org>

From: Yishai Hadas <yishaih@mellanox.com>

Expose vDPA emulation device capabilities from the core layer.
It includes reading the capabilities from the firmware and exposing
helper functions to access the data.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Shahaf Shuler <shahafs@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/fw.c | 7 +++++++
 include/linux/mlx5/device.h                  | 9 +++++++++
 2 files changed, 16 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw.c b/drivers/net/ethernet/mellanox/mlx5/core/fw.c
index a19790dee7b2..c375edfe528c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fw.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fw.c
@@ -245,6 +245,13 @@ int mlx5_query_hca_caps(struct mlx5_core_dev *dev)
 			return err;
 	}
 
+	if (MLX5_CAP_GEN_64(dev, general_obj_types) &
+		MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q) {
+		err = mlx5_core_get_caps(dev, MLX5_CAP_VDPA_EMULATION);
+		if (err)
+			return err;
+	}
+
 	return 0;
 }
 
diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h
index cc1c230f10ee..1a1c53f0262d 100644
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -1105,6 +1105,7 @@ enum mlx5_cap_type {
 	MLX5_CAP_DEV_MEM,
 	MLX5_CAP_RESERVED_16,
 	MLX5_CAP_TLS,
+	MLX5_CAP_VDPA_EMULATION = 0x13,
 	MLX5_CAP_DEV_EVENT = 0x14,
 	/* NUM OF CAP Types */
 	MLX5_CAP_NUM
@@ -1297,6 +1298,14 @@ enum mlx5_qcam_feature_groups {
 #define MLX5_CAP_DEV_EVENT(mdev, cap)\
 	MLX5_ADDR_OF(device_event_cap, (mdev)->caps.hca_cur[MLX5_CAP_DEV_EVENT], cap)
 
+#define MLX5_CAP_DEV_VDPA_EMULATION(mdev, cap)\
+	MLX5_GET(device_virtio_emulation_cap, \
+		(mdev)->caps.hca_cur[MLX5_CAP_VDPA_EMULATION], cap)
+
+#define MLX5_CAP64_DEV_VDPA_EMULATION(mdev, cap)\
+	MLX5_GET64(device_virtio_emulation_cap, \
+		(mdev)->caps.hca_cur[MLX5_CAP_VDPA_EMULATION], cap)
+
 enum {
 	MLX5_CMD_STAT_OK			= 0x0,
 	MLX5_CMD_STAT_INT_ERR			= 0x1,
-- 
2.20.1


  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-12 11:09 [PATCH rdma-next 0/5] VIRTIO_NET Emulation Offload Leon Romanovsky
2019-12-12 11:09 ` [PATCH mlx5-next 1/5] net/mlx5: Add Virtio Emulation related device capabilities Leon Romanovsky
2019-12-12 11:09 ` Leon Romanovsky [this message]
2019-12-12 11:09 ` [PATCH rdma-next 3/5] IB/mlx5: Extend caps stage to handle VAR capabilities Leon Romanovsky
2019-12-12 11:09 ` [PATCH rdma-next 4/5] IB/mlx5: Introduce VAR object and its alloc/destroy methods Leon Romanovsky
2020-01-07 19:36   ` Jason Gunthorpe
2020-01-08  8:12     ` Yishai Hadas
2019-12-12 11:09 ` [PATCH rdma-next 5/5] IB/mlx5: Add mmap support for VAR Leon Romanovsky
2020-01-07 19:37 ` [PATCH rdma-next 0/5] VIRTIO_NET Emulation Offload Jason Gunthorpe
2020-01-10 18:30   ` Leon Romanovsky
2020-01-12 23:54     ` Jason Gunthorpe

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