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| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2021-11-16 23:15:55 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-02-28 15:50:45 -0500 |
| commit | db4556d1581a744a032ccd8d87af8e920f154f7c (patch) | |
| tree | e962d2522911340cd2044c9841f21942fb3d7e9a /include/uapi | |
| parent | 4755639a31efea0e4f6f8bf4104ab48e4a6b5d18 (diff) | |
| download | linux-db4556d1581a744a032ccd8d87af8e920f154f7c.tar.gz | |
drm/amdkfd: Implement DMA buf fd export from KFD
Exports a DMA buf fd of a given KFD buffer handle. This is intended for being able to import KFD BOs into GEM contexts to leverage the amdgpu_bo_va API for more flexible virtual address mappings. It will also be used for the new upstreamable RDMA solution coming to UCX and RCCL. The corresponding user mode change (Thunk API and kfdtest) is here: https://github.com/fxkamd/ROCT-Thunk-Interface/commits/fxkamd/dmabuf Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Reviewed-by: Xiaogang Chen <Xiaogang.Chen@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/kfd_ioctl.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h index 42b60198b6c5..2da5c3ad71bd 100644 --- a/include/uapi/linux/kfd_ioctl.h +++ b/include/uapi/linux/kfd_ioctl.h @@ -37,9 +37,10 @@ * - 1.9 - Add available memory ioctl * - 1.10 - Add SMI profiler event log * - 1.11 - Add unified memory for ctx save/restore area + * - 1.12 - Add DMA buf export ioctl */ #define KFD_IOCTL_MAJOR_VERSION 1 -#define KFD_IOCTL_MINOR_VERSION 11 +#define KFD_IOCTL_MINOR_VERSION 12 struct kfd_ioctl_get_version_args { __u32 major_version; /* from KFD */ @@ -463,6 +464,12 @@ struct kfd_ioctl_import_dmabuf_args { __u32 dmabuf_fd; /* to KFD */ }; +struct kfd_ioctl_export_dmabuf_args { + __u64 handle; /* to KFD */ + __u32 flags; /* to KFD */ + __u32 dmabuf_fd; /* from KFD */ +}; + /* * KFD SMI(System Management Interface) events */ @@ -877,7 +884,10 @@ struct kfd_ioctl_set_xnack_mode_args { #define AMDKFD_IOC_AVAILABLE_MEMORY \ AMDKFD_IOWR(0x23, struct kfd_ioctl_get_available_memory_args) +#define AMDKFD_IOC_EXPORT_DMABUF \ + AMDKFD_IOWR(0x24, struct kfd_ioctl_export_dmabuf_args) + #define AMDKFD_COMMAND_START 0x01 -#define AMDKFD_COMMAND_END 0x24 +#define AMDKFD_COMMAND_END 0x25 #endif |