Commit 10304796 authored Nov 13, 2024 by Matthew Brost

drm/xe: Add xe_ring_lrc_is_idle() helper



Add helper to compare ring head and tail to determine if LRC is idle.

v2:
 - Fix kernel doc (CI, Zhanjun)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241114022522.1951351-2-matthew.brost@intel.com

parent 68634b12

drivers/gpu/drm/xe/xe_guc_submit.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1696,7 +1696,7 @@ static void guc_exec_queue_stop(struct xe_guc guc, struct xe_exec_queue q)
		ban = true;
		}
		} else if (xe_exec_queue_is_lr(q) &&
		(xe_lrc_ring_head(q->lrc[0]) != xe_lrc_ring_tail(q->lrc[0]))) {
		!xe_lrc_ring_is_idle(q->lrc[0])) {
		ban = true;
		}

drivers/gpu/drm/xe/xe_lrc.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -1763,3 +1763,16 @@ u32 xe_lrc_update_timestamp(struct xe_lrc lrc, u32 old_ts)

		return lrc->ctx_timestamp;
		}

		/**
		* xe_lrc_ring_is_idle() - LRC is idle
		* @lrc: Pointer to the lrc.
		*
		* Compare LRC ring head and tail to determine if idle.
		*
		* Return: True is ring is idle, False otherwise
		*/
		bool xe_lrc_ring_is_idle(struct xe_lrc *lrc)
		{
		return xe_lrc_ring_head(lrc) == xe_lrc_ring_tail(lrc);
		}

drivers/gpu/drm/xe/xe_lrc.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -78,6 +78,8 @@ 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);

		bool xe_lrc_ring_is_idle(struct xe_lrc *lrc);

		u32 xe_lrc_indirect_ring_ggtt_addr(struct xe_lrc *lrc);
		u32 xe_lrc_ggtt_addr(struct xe_lrc *lrc);
		u32 xe_lrc_regs(struct xe_lrc lrc);