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| author | Daniel Phillips <Daniel.Phillips@amd.com> | 2022-05-30 11:21:22 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-06-14 21:38:40 -0400 |
| commit | 9731dd4cadc53251ef80b3655c8d841fed52fa3d (patch) | |
| tree | d2385079c1d0da89501f0e8cc3aacb33244d9479 /include/uapi/linux/kfd_ioctl.h | |
| parent | 1a65327a84db5b9081a51ccb1c562083f59bfcec (diff) | |
| download | lwn-9731dd4cadc53251ef80b3655c8d841fed52fa3d.tar.gz lwn-9731dd4cadc53251ef80b3655c8d841fed52fa3d.zip | |
drm/amdkfd: Add available memory ioctl
Add a new KFD ioctl to return the largest possible memory size that
can be allocated as a buffer object using
kfd_ioctl_alloc_memory_of_gpu. It attempts to use exactly the same
accept/reject criteria as that function so that allocating a new
buffer object of the size returned by this new ioctl is guaranteed to
succeed, barring races with other allocating tasks.
This IOCTL will be used by libhsakmt:
https://www.mail-archive.com/amd-gfx@lists.freedesktop.org/msg75743.html
Signed-off-by: Daniel Phillips <Daniel.Phillips@amd.com>
Signed-off-by: David Yat Sin <David.YatSin@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'include/uapi/linux/kfd_ioctl.h')
| -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 42975e940758..231eb010b823 100644 --- a/include/uapi/linux/kfd_ioctl.h +++ b/include/uapi/linux/kfd_ioctl.h @@ -34,9 +34,10 @@ * - 1.6 - Query clear flags in SVM get_attr API * - 1.7 - Checkpoint Restore (CRIU) API * - 1.8 - CRIU - Support for SDMA transfers with GTT BOs + * - 1.9 - Add available memory ioctl */ #define KFD_IOCTL_MAJOR_VERSION 1 -#define KFD_IOCTL_MINOR_VERSION 8 +#define KFD_IOCTL_MINOR_VERSION 9 struct kfd_ioctl_get_version_args { __u32 major_version; /* from KFD */ @@ -100,6 +101,12 @@ struct kfd_ioctl_get_queue_wave_state_args { __u32 pad; }; +struct kfd_ioctl_get_available_memory_args { + __u64 available; /* from KFD */ + __u32 gpu_id; /* to KFD */ + __u32 pad; +}; + /* For kfd_ioctl_set_memory_policy_args.default_policy and alternate_policy */ #define KFD_IOC_CACHE_POLICY_COHERENT 0 #define KFD_IOC_CACHE_POLICY_NONCOHERENT 1 @@ -826,7 +833,10 @@ struct kfd_ioctl_set_xnack_mode_args { #define AMDKFD_IOC_CRIU_OP \ AMDKFD_IOWR(0x22, struct kfd_ioctl_criu_args) +#define AMDKFD_IOC_AVAILABLE_MEMORY \ + AMDKFD_IOWR(0x23, struct kfd_ioctl_get_available_memory_args) + #define AMDKFD_COMMAND_START 0x01 -#define AMDKFD_COMMAND_END 0x23 +#define AMDKFD_COMMAND_END 0x24 #endif |