drivers/gpu/drm/xe/xe_lrc.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/xe/xe_lrc.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/xe/xe_lrc.h
Extension
.h
Size
5498 bytes
Lines
184
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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct xe_lrc_snapshot {
	struct xe_bo *lrc_bo;
	void *lrc_snapshot;
	unsigned long lrc_size, lrc_offset;
	unsigned long replay_size, replay_offset;

	u32 context_desc;
	u32 ring_addr;
	u32 indirect_context_desc;
	u32 head;
	u32 start;
	struct {
		u32 internal;
		u32 memory;
	} tail;
	u32 start_seqno;
	u32 seqno;
	u64 ctx_timestamp;
	u64 ctx_timestamp_ms;
	u64 queue_timestamp;
	u64 queue_timestamp_ms;
	u32 ctx_job_timestamp;
};

#define LRC_PPHWSP_FLUSH_INVAL_SCRATCH_ADDR (0x34 * 4)
#define LRC_PPHWSP_PXP_INVAL_SCRATCH_ADDR (0x40 * 4)

#define LRC_WA_BB_SIZE SZ_4K

#define XE_LRC_CREATE_RUNALONE		BIT(0)
#define XE_LRC_CREATE_PXP		BIT(1)
#define XE_LRC_CREATE_USER_CTX		BIT(2)
#define XE_LRC_DISABLE_STATE_CACHE_PERF_FIX	BIT(3)

struct xe_lrc *xe_lrc_create(struct xe_hw_engine *hwe, struct xe_vm *vm,
			     void *replay_state, u32 ring_size, u16 msix_vec, u32 flags);
void xe_lrc_destroy(struct kref *ref);

/**
 * xe_lrc_get - Get reference to the LRC
 * @lrc: Logical Ring Context
 *
 * Increment reference count of @lrc
 */
static inline struct xe_lrc *xe_lrc_get(struct xe_lrc *lrc)
{
	kref_get(&lrc->refcount);
	return lrc;
}

/**
 * xe_lrc_put - Put reference of the LRC
 * @lrc: Logical Ring Context
 *
 * Decrement reference count of @lrc, call xe_lrc_destroy when
 * reference count reaches 0.
 */
static inline void xe_lrc_put(struct xe_lrc *lrc)
{
	if (lrc)
		kref_put(&lrc->refcount, xe_lrc_destroy);
}

/**
 * xe_lrc_ring_size() - Xe LRC ring size
 *
 * Return: Size of LRC ring buffer
 */
static inline size_t xe_lrc_ring_size(void)
{
	return SZ_16K;
}

static inline bool xe_lrc_is_multi_queue(struct xe_lrc *lrc)
{
	return lrc->multi_queue.primary_lrc;
}

size_t xe_gt_lrc_hang_replay_size(struct xe_gt *gt, enum xe_engine_class class);
size_t xe_gt_lrc_size(struct xe_gt *gt, enum xe_engine_class class);
u32 xe_lrc_pphwsp_offset(struct xe_lrc *lrc);
u32 xe_lrc_regs_offset(struct xe_lrc *lrc);

void xe_lrc_set_ring_tail(struct xe_lrc *lrc, u32 tail);
u32 xe_lrc_ring_tail(struct xe_lrc *lrc);
void xe_lrc_set_ring_head(struct xe_lrc *lrc, u32 head);
u32 xe_lrc_ring_head(struct xe_lrc *lrc);
u32 xe_lrc_ring_space(struct xe_lrc *lrc);
void xe_lrc_write_ring(struct xe_lrc *lrc, const void *data, size_t size);

Annotation

Implementation Notes