openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/i915/guc: Reorder __i915_guc_submit to reduce spinlock holdtime 

A couple of operations, the flushes and the tracepoint, do not require
serialisation by client->wq_lock, so move them before we take it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170228112803.11646-3-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
This commit is contained in:
Chris Wilson 2017-02-28 11:28:03 +00:00
parent 349ab9192c
commit 0c33518db7
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpu/drm/i915/i915_guc_submission.c
View File

@ -517,18 +517,18 @@ static void __i915_guc_submit(struct drm_i915_gem_request *rq)
struct i915_guc_client *client = guc->execbuf_client;
int b_ret;
/* We are always called with irqs disabled */
GEM_BUG_ON(!irqs_disabled());
spin_lock(&client->wq_lock);
guc_wq_item_append(client, rq);
/* WA to flush out the pending GMADR writes to ring buffer. */
if (i915_vma_is_map_and_fenceable(rq->ring->vma))
POSTING_READ_FW(GUC_STATUS);
trace_i915_gem_request_in(rq, 0);
/* We are always called with irqs disabled */
GEM_BUG_ON(!irqs_disabled());
spin_lock(&client->wq_lock);
guc_wq_item_append(client, rq);
b_ret = guc_ring_doorbell(client);
client->submissions[engine_id] += 1;
@ -538,6 +538,7 @@ static void __i915_guc_submit(struct drm_i915_gem_request *rq)
guc->submissions[engine_id] += 1;
guc->last_seqno[engine_id] = rq->global_seqno;
spin_unlock(&client->wq_lock);
}