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Date: Thu, 12 Dec 2019 13:09:25 +0200
From: Leon Romanovsky <leon@...nel.org>
To: Doug Ledford <dledford@...hat.com>,
Jason Gunthorpe <jgg@...lanox.com>
Cc: Leon Romanovsky <leonro@...lanox.com>,
RDMA mailing list <linux-rdma@...r.kernel.org>,
Shahaf Shuler <shahafs@...lanox.com>,
Yishai Hadas <yishaih@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>,
linux-netdev <netdev@...r.kernel.org>
Subject: [PATCH mlx5-next 2/5] net/mlx5: Expose vDPA emulation device capabilities
From: Yishai Hadas <yishaih@...lanox.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@...lanox.com>
Reviewed-by: Shahaf Shuler <shahafs@...lanox.com>
Signed-off-by: Leon Romanovsky <leonro@...lanox.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
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