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drm/amdkfd: Add CWSR support

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This hardware feature allows the GPU to preempt shader execution in
the middle of a compute wave, save the state and restore it later
to resume execution.

Memory for saving the state is allocated per queue in user mode and
the address and size passed to the create_queue ioctl. The size
depends on the number of waves that can be in flight simultaneously
on a given ASIC.

Signed-off-by: Shaoyun.liu <shaoyun.liu@amd.com>
Signed-off-by: Yong Zhao <yong.zhao@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Felix Kuehling 2017-11-14 16:41:19 -05:00 • committed by Oded Gabbay
parent 449fea6126
commit 373d708089
8 changed files with 179 additions and 6 deletions
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3
include/uapi/linux/kfd_ioctl.h
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@ -58,7 +58,8 @@ struct kfd_ioctl_create_queue_args {
__u64 eop_buffer_address; /* to KFD */
__u64 eop_buffer_size; /* to KFD */
__u64 ctx_save_restore_address; /* to KFD */
__u64 ctx_save_restore_size; /* to KFD */
__u32 ctx_save_restore_size; /* to KFD */
__u32 ctl_stack_size; /* to KFD */
};
struct kfd_ioctl_destroy_queue_args {