From d8d019ccffb838bb0dd98e583b5c25ccc0bc6ece Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Tue, 6 Feb 2018 20:32:35 -0500 Subject: drm/amdgpu: Add KFD eviction fence This fence is used by KFD to keep memory resident while user mode queues are enabled. Trying to evict memory will trigger the enable_signaling callback, which starts a KFD eviction, which involves preempting user mode queues before signaling the fence. There is one such fence per process. v2: * Grab a reference to mm_struct * Dereference fence after NULL check * Simplify fence release, no need to signal without anyone waiting * Added signed-off-by Harish, who is the original author of this code v3: * update MAINTAINERS file * change amd_kfd_ prefix to amdkfd_ * remove useless initialization of variable to NULL v4: * set amdkfd_fence_ops to be static * Suggested by: Fengguang Wu Signed-off-by: Harish Kasiviswanathan Signed-off-by: Felix Kuehling Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h index 2a519f9062ee..833dc26d402f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h @@ -29,6 +29,8 @@ #include #include +extern const struct kgd2kfd_calls *kgd2kfd; + struct amdgpu_device; struct kgd_mem { @@ -37,6 +39,19 @@ struct kgd_mem { void *cpu_ptr; }; +/* KFD Memory Eviction */ +struct amdgpu_amdkfd_fence { + struct dma_fence base; + struct mm_struct *mm; + spinlock_t lock; + char timeline_name[TASK_COMM_LEN]; +}; + +struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context, + struct mm_struct *mm); +bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm); +struct amdgpu_amdkfd_fence *to_amdgpu_amdkfd_fence(struct dma_fence *f); + int amdgpu_amdkfd_init(void); void amdgpu_amdkfd_fini(void); -- cgit v1.2.3-70-g09d2