drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.h

Extension

.h

Size

2545 bytes

Lines

73

Domain

Driver Families

Bucket

drivers/gpu

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/dma-fence.h

Detected Declarations

• struct amdgpu_eviction_fence
• struct amdgpu_eviction_fence_mgr
• function amdgpu_evf_mgr_get_fence

Annotated Snippet

struct amdgpu_eviction_fence {
	struct dma_fence base;
	spinlock_t	 lock;
	char		 timeline_name[TASK_COMM_LEN];
	struct amdgpu_eviction_fence_mgr *evf_mgr;
};

struct amdgpu_eviction_fence_mgr {
	u64			ev_fence_ctx;
	atomic_t		ev_fence_seq;

	/*
	 * Only updated while holding the VM resv lock.
	 * Only signaled while holding the userq mutex.
	 */
	struct dma_fence __rcu	*ev_fence;
	struct work_struct	suspend_work;
	bool			shutdown;
};

static inline struct dma_fence *
amdgpu_evf_mgr_get_fence(struct amdgpu_eviction_fence_mgr *evf_mgr)
{
	struct dma_fence *ev_fence;

	rcu_read_lock();
	ev_fence = dma_fence_get_rcu_safe(&evf_mgr->ev_fence);
	rcu_read_unlock();
	return ev_fence;
}

int amdgpu_evf_mgr_attach_fence(struct amdgpu_eviction_fence_mgr *evf_mgr,
				struct amdgpu_bo *bo);
int amdgpu_evf_mgr_rearm(struct amdgpu_eviction_fence_mgr *evf_mgr,
			 struct drm_exec *exec);
void amdgpu_evf_mgr_detach_fence(struct amdgpu_eviction_fence_mgr *evf_mgr,
				 struct amdgpu_bo *bo);
void amdgpu_evf_mgr_init(struct amdgpu_eviction_fence_mgr *evf_mgr);
void amdgpu_evf_mgr_shutdown(struct amdgpu_eviction_fence_mgr *evf_mgr);
void amdgpu_evf_mgr_flush_suspend(struct amdgpu_eviction_fence_mgr *evf_mgr);
void amdgpu_evf_mgr_fini(struct amdgpu_eviction_fence_mgr *evf_mgr);

#endif

Annotation

• Immediate include surface: `linux/dma-fence.h`.
• Detected declarations: `struct amdgpu_eviction_fence`, `struct amdgpu_eviction_fence_mgr`, `function amdgpu_evf_mgr_get_fence`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.