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drm/xe: Add xe_ring_lrc_is_idle() helper

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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
This commit is contained in:
Matthew Brost 2024-11-13 18:25:16 -08:00
parent 68634b12d7
commit 1030479691
3 changed files with 16 additions and 1 deletions
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2
drivers/gpu/drm/xe/xe_guc_submit.c
View File

@ -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;
}

13
drivers/gpu/drm/xe/xe_lrc.c
View File

@ -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);
}

2
drivers/gpu/drm/xe/xe_lrc.h
View File

@ -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);