diff options
| author | Eli Cohen <eli@mellanox.com> | 2020-08-04 19:20:47 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-08-06 02:00:24 +0300 |
| commit | 94abbccdf2916cb03f9626f2d36c6e9971490c12 (patch) | |
| tree | 81f45c0b4cc6ef67f56d3fc13bc256558d1d1c08 /drivers/vdpa/mlx5/core/mlx5_vdpa.h | |
| parent | 29064bfdabd5ef49eac6909d3a36a075e3b52255 (diff) | |
| download | linux-94abbccdf2916cb03f9626f2d36c6e9971490c12.tar.xz | |
vdpa/mlx5: Add shared memory registration code
Add code to support registering address space region for the device. The
virtio driver can run as either:
1. Guest virtio driver
2. Userspace virtio driver on the host
3. Kernel virtio driver on the host
In any case a memory key object is required to provide access to memory
for the device.
This code will be shared by network or block driver implementations.
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Link: https://lore.kernel.org/r/20200804162048.22587-12-eli@mellanox.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa/mlx5/core/mlx5_vdpa.h')
| -rw-r--r-- | drivers/vdpa/mlx5/core/mlx5_vdpa.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/vdpa/mlx5/core/mlx5_vdpa.h b/drivers/vdpa/mlx5/core/mlx5_vdpa.h index f3571c8b257e..5c92a576edae 100644 --- a/drivers/vdpa/mlx5/core/mlx5_vdpa.h +++ b/drivers/vdpa/mlx5/core/mlx5_vdpa.h @@ -7,6 +7,31 @@ #include <linux/vdpa.h> #include <linux/mlx5/driver.h> +struct mlx5_vdpa_direct_mr { + u64 start; + u64 end; + u32 perm; + struct mlx5_core_mkey mr; + struct sg_table sg_head; + int log_size; + int nsg; + struct list_head list; + u64 offset; +}; + +struct mlx5_vdpa_mr { + struct mlx5_core_mkey mkey; + + /* list of direct MRs descendants of this indirect mr */ + struct list_head head; + unsigned long num_directs; + unsigned long num_klms; + bool initialized; + + /* serialize mkey creation and destruction */ + struct mutex mkey_mtx; +}; + struct mlx5_vdpa_resources { u32 pdn; struct mlx5_uars_page *uar; @@ -26,6 +51,8 @@ struct mlx5_vdpa_dev { u8 status; u32 max_vqs; u32 generation; + + struct mlx5_vdpa_mr mr; }; int mlx5_vdpa_alloc_pd(struct mlx5_vdpa_dev *dev, u32 *pdn, u16 uid); @@ -41,6 +68,13 @@ int mlx5_vdpa_alloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 *tdn); void mlx5_vdpa_dealloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 tdn); int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev); void mlx5_vdpa_free_resources(struct mlx5_vdpa_dev *mvdev); +int mlx5_vdpa_create_mkey(struct mlx5_vdpa_dev *mvdev, struct mlx5_core_mkey *mkey, u32 *in, + int inlen); +int mlx5_vdpa_destroy_mkey(struct mlx5_vdpa_dev *mvdev, struct mlx5_core_mkey *mkey); +int mlx5_vdpa_handle_set_map(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb, + bool *change_map); +int mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb); +void mlx5_vdpa_destroy_mr(struct mlx5_vdpa_dev *mvdev); #define mlx5_vdpa_warn(__dev, format, ...) \ dev_warn((__dev)->mdev->device, "%s:%d:(pid %d) warning: " format, __func__, __LINE__, \ |