xf86-video-intel: 6 commits - src/sna/gen6_render.c src/sna/gen7_render.c src/sna/kgem.c src/sna/kgem.h src/sna/sna_accel.c src/sna/sna_blt.c src/sna/sna_io.c

Chris Wilson ickle at kemper.freedesktop.org
Sat Apr 28 09:53:31 PDT 2012


 src/sna/gen6_render.c |    6 -
 src/sna/gen7_render.c |    6 -
 src/sna/kgem.c        |   44 ++++++++-
 src/sna/kgem.h        |    5 -
 src/sna/sna_accel.c   |  233 +++++++++++++++++++-------------------------------
 src/sna/sna_blt.c     |   34 +++----
 src/sna/sna_io.c      |    6 -
 7 files changed, 161 insertions(+), 173 deletions(-)

New commits:
commit a206a1eee1fb799d567d68db564d663cfc66f6cc
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Sat Apr 28 01:54:43 2012 +0100

    sna: Tune relocation array size
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

diff --git a/src/sna/kgem.h b/src/sna/kgem.h
index 4def6b1..ad2fe84 100644
--- a/src/sna/kgem.h
+++ b/src/sna/kgem.h
@@ -171,7 +171,7 @@ struct kgem {
 
 	uint32_t batch[4*1024];
 	struct drm_i915_gem_exec_object2 exec[256];
-	struct drm_i915_gem_relocation_entry reloc[384];
+	struct drm_i915_gem_relocation_entry reloc[612];
 };
 
 #define KGEM_BATCH_RESERVED 1
commit 4f1908c651ef9e2af33d8831466a605234978c46
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Apr 27 23:19:56 2012 +0100

    sna: PolyPoint only uses the gc->fgPixel
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

diff --git a/src/sna/sna_accel.c b/src/sna/sna_accel.c
index f4d3de4..12017bd 100644
--- a/src/sna/sna_accel.c
+++ b/src/sna/sna_accel.c
@@ -5560,8 +5560,7 @@ static Bool
 sna_poly_point_blt(DrawablePtr drawable,
 		   struct kgem_bo *bo,
 		   struct sna_damage **damage,
-		   GCPtr gc, uint32_t pixel,
-		   int mode, int n, DDXPointPtr pt,
+		   GCPtr gc, int mode, int n, DDXPointPtr pt,
 		   bool clipped)
 {
 	PixmapPtr pixmap = get_drawable_pixmap(drawable);
@@ -5574,7 +5573,7 @@ sna_poly_point_blt(DrawablePtr drawable,
 	DBG(("%s: alu=%d, pixel=%08lx, clipped?=%d\n",
 	     __FUNCTION__, gc->alu, gc->fgPixel, clipped));
 
-	if (!sna_fill_init_blt(&fill, sna, pixmap, bo, gc->alu, pixel))
+	if (!sna_fill_init_blt(&fill, sna, pixmap, bo, gc->alu, gc->fgPixel))
 		return FALSE;
 
 	get_drawable_deltas(drawable, pixmap, &dx, &dy);
@@ -5704,7 +5703,6 @@ sna_poly_point(DrawablePtr drawable, GCPtr gc,
 	struct sna *sna = to_sna_from_pixmap(pixmap);
 	RegionRec region;
 	unsigned flags;
-	uint32_t color;
 
 	DBG(("%s(mode=%d, n=%d, pt[0]=(%d, %d)\n",
 	     __FUNCTION__, mode, n, pt[0].x, pt[0].y));
@@ -5729,7 +5727,7 @@ sna_poly_point(DrawablePtr drawable, GCPtr gc,
 		goto fallback;
 	}
 
-	if (PM_IS_SOLID(drawable, gc->planemask) && gc_is_solid(gc, &color)) {
+	if (PM_IS_SOLID(drawable, gc->planemask)) {
 		struct sna_damage **damage;
 		struct kgem_bo *bo;
 
@@ -5738,7 +5736,7 @@ sna_poly_point(DrawablePtr drawable, GCPtr gc,
 
 		if ((bo = sna_drawable_use_bo(drawable, false, &region.extents, &damage)) &&
 		    sna_poly_point_blt(drawable, bo, damage,
-				       gc, color, mode, n, pt, flags & 2))
+				       gc, mode, n, pt, flags & 2))
 			return;
 	}
 
commit 8453034c7dd893f1d4c32ee87724f3a13137595d
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Apr 27 22:08:51 2012 +0100

    sna/gen6: Allow ring switching at the start of a batch
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

diff --git a/src/sna/gen6_render.c b/src/sna/gen6_render.c
index 5bbe5e3..38fb024 100644
--- a/src/sna/gen6_render.c
+++ b/src/sna/gen6_render.c
@@ -57,7 +57,7 @@
 #define NO_FILL_BOXES 0
 #define NO_CLEAR 0
 
-#define NO_RING_SWITCH 1
+#define NO_RING_SWITCH 0
 
 #define GEN6_MAX_SIZE 8192
 
@@ -2332,7 +2332,7 @@ static bool prefer_blt_ring(struct sna *sna)
 
 static bool can_switch_rings(struct sna *sna)
 {
-	return sna->kgem.has_semaphores && !NO_RING_SWITCH;
+	return sna->kgem.mode == KGEM_NONE && sna->kgem.has_semaphores && !NO_RING_SWITCH;
 }
 
 static Bool
@@ -2369,6 +2369,8 @@ try_blt(struct sna *sna,
 	if (can_switch_rings(sna)) {
 		if (sna_picture_is_solid(src, NULL))
 			return TRUE;
+		if (src->pDrawable)
+			return TRUE;
 	}
 
 	return FALSE;
diff --git a/src/sna/gen7_render.c b/src/sna/gen7_render.c
index 2228873..327714f 100644
--- a/src/sna/gen7_render.c
+++ b/src/sna/gen7_render.c
@@ -57,7 +57,7 @@
 #define NO_FILL_BOXES 0
 #define NO_CLEAR 0
 
-#define NO_RING_SWITCH 1
+#define NO_RING_SWITCH 0
 
 #define GEN7_MAX_SIZE 16384
 
@@ -2425,7 +2425,7 @@ static bool prefer_blt_ring(struct sna *sna)
 
 static bool can_switch_rings(struct sna *sna)
 {
-	return sna->kgem.has_semaphores && !NO_RING_SWITCH;
+	return sna->kgem.mode == KGEM_NONE && sna->kgem.has_semaphores && !NO_RING_SWITCH;
 }
 
 static Bool
@@ -2462,6 +2462,8 @@ try_blt(struct sna *sna,
 	if (can_switch_rings(sna)) {
 		if (sna_picture_is_solid(src, NULL))
 			return TRUE;
+		if (src->pDrawable)
+			return TRUE;
 	}
 
 	return FALSE;
commit 93ad7793894787600c5074917c753fa7c6816134
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Apr 27 22:03:55 2012 +0100

    sna: Tweak semaphores-enabled heuristic
    
    The kernel module now defaults to -1, confusing the test.
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

diff --git a/src/sna/kgem.c b/src/sna/kgem.c
index 29f0e29..4302952 100644
--- a/src/sna/kgem.c
+++ b/src/sna/kgem.c
@@ -574,7 +574,7 @@ static bool semaphores_enabled(void)
 	if (file) {
 		int value;
 		if (fscanf(file, "%d", &value) == 1)
-			detected = value > 0;
+			detected = value != 0;
 		fclose(file);
 	}
 
commit 986dbdda3bf8dcf208e55543d8a3393c4b53f10b
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Apr 27 19:21:44 2012 +0100

    sna: Tweak placement choice for high-overhead operations
    
    Some operations cost more to setup than to transfer data back and forth!
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

diff --git a/src/sna/sna_accel.c b/src/sna/sna_accel.c
index a5c1648..f4d3de4 100644
--- a/src/sna/sna_accel.c
+++ b/src/sna/sna_accel.c
@@ -1923,6 +1923,7 @@ box_inplace(PixmapPtr pixmap, const BoxRec *box)
 
 static inline struct kgem_bo *
 sna_drawable_use_bo(DrawablePtr drawable,
+		    bool prefer_gpu,
 		    const BoxRec *box,
 		    struct sna_damage ***damage)
 {
@@ -1949,6 +1950,9 @@ sna_drawable_use_bo(DrawablePtr drawable,
 		goto use_cpu_bo;
 	}
 
+	if (!prefer_gpu && priv->gpu_bo && !kgem_bo_is_busy(priv->gpu_bo))
+		goto use_cpu_bo;
+
 	if (DAMAGE_IS_ALL(priv->gpu_damage))
 		goto use_gpu_bo;
 
@@ -1968,6 +1972,12 @@ sna_drawable_use_bo(DrawablePtr drawable,
 			goto use_cpu_bo;
 		}
 
+		if (priv->cpu_damage && !prefer_gpu) {
+			DBG(("%s: prefer cpu",
+			     __FUNCTION__));
+			goto use_cpu_bo;
+		}
+
 		if (!sna_pixmap_move_to_gpu(pixmap, MOVE_WRITE | MOVE_READ))
 			goto use_cpu_bo;
 
@@ -2932,7 +2942,8 @@ sna_put_xybitmap_blt(DrawablePtr drawable, GCPtr gc, RegionPtr region,
 	int n;
 	uint8_t rop = copy_ROP[gc->alu];
 
-	bo = sna_drawable_use_bo(&pixmap->drawable, &region->extents, &damage);
+	bo = sna_drawable_use_bo(&pixmap->drawable, true,
+				 &region->extents, &damage);
 	if (bo == NULL)
 		return false;
 
@@ -3054,7 +3065,8 @@ sna_put_xypixmap_blt(DrawablePtr drawable, GCPtr gc, RegionPtr region,
 	if (gc->alu != GXcopy)
 		return false;
 
-	bo = sna_drawable_use_bo(&pixmap->drawable, &region->extents, &damage);
+	bo = sna_drawable_use_bo(&pixmap->drawable, true,
+				 &region->extents, &damage);
 	if (bo == NULL)
 		return false;
 
@@ -4952,7 +4964,7 @@ sna_fill_spans(DrawablePtr drawable, GCPtr gc, int n,
 	if (!PM_IS_SOLID(drawable, gc->planemask))
 		goto fallback;
 
-	bo = sna_drawable_use_bo(drawable, &region.extents, &damage);
+	bo = sna_drawable_use_bo(drawable, true, &region.extents, &damage);
 	if (bo) {
 		if (gc_is_solid(gc, &color)) {
 			DBG(("%s: trying solid fill [alu=%d, pixel=%08lx] blt paths\n",
@@ -5502,7 +5514,7 @@ sna_copy_plane(DrawablePtr src, DrawablePtr dst, GCPtr gc,
 	if (!PM_IS_SOLID(dst, gc->planemask))
 		goto fallback;
 
-	arg.bo = sna_drawable_use_bo(dst, &region.extents, &arg.damage);
+	arg.bo = sna_drawable_use_bo(dst, true, &region.extents, &arg.damage);
 	if (arg.bo) {
 		if (arg.bo->tiling == I915_TILING_Y) {
 			assert(arg.bo == sna_pixmap_get_bo(pixmap));
@@ -5724,7 +5736,7 @@ sna_poly_point(DrawablePtr drawable, GCPtr gc,
 		DBG(("%s: trying solid fill [%08lx] blt paths\n",
 		     __FUNCTION__, gc->fgPixel));
 
-		if ((bo = sna_drawable_use_bo(drawable, &region.extents, &damage)) &&
+		if ((bo = sna_drawable_use_bo(drawable, false, &region.extents, &damage)) &&
 		    sna_poly_point_blt(drawable, bo, damage,
 				       gc, color, mode, n, pt, flags & 2))
 			return;
@@ -6417,50 +6429,10 @@ sna_poly_line_extents(DrawablePtr drawable, GCPtr gc,
 inline static bool
 _use_zero_spans(DrawablePtr drawable, GCPtr gc, const BoxRec *extents)
 {
-	PixmapPtr pixmap;
-	struct sna_pixmap *priv;
-	BoxRec area;
-	int16_t dx, dy;
-
 	if (USE_ZERO_SPANS)
 		return USE_ZERO_SPANS > 0;
 
-	if (!drawable_gc_inplace_hint(drawable, gc))
-		return TRUE;
-
-	/* XXX check for GPU stalls on the gc (stipple, tile, etc) */
-
-	pixmap = get_drawable_pixmap(drawable);
-	priv = sna_pixmap(pixmap);
-	if (priv == NULL)
-		return FALSE;
-
-	if (DAMAGE_IS_ALL(priv->cpu_damage))
-		return FALSE;
-
-	if (priv->stride == 0 || priv->gpu_bo == NULL)
-		return FALSE;
-
-	if (!kgem_bo_is_busy(priv->gpu_bo))
-		return FALSE;
-
-	if (DAMAGE_IS_ALL(priv->gpu_damage))
-		return TRUE;
-
-	if (priv->gpu_damage == NULL)
-		return FALSE;
-
-	get_drawable_deltas(drawable, pixmap, &dx, &dy);
-	area = *extents;
-	area.x1 += dx;
-	area.x2 += dx;
-	area.y1 += dy;
-	area.y2 += dy;
-	DBG(("%s extents (%d, %d), (%d, %d)\n", __FUNCTION__,
-	     area.x1, area.y1, area.x2, area.y2));
-
-	return sna_damage_contains_box(priv->gpu_damage,
-				       &area) != PIXMAN_REGION_OUT;
+	return !drawable_gc_inplace_hint(drawable, gc);
 }
 
 static bool
@@ -6481,50 +6453,10 @@ use_zero_spans(DrawablePtr drawable, GCPtr gc, const BoxRec *extents)
 inline static bool
 _use_wide_spans(DrawablePtr drawable, GCPtr gc, const BoxRec *extents)
 {
-	PixmapPtr pixmap;
-	struct sna_pixmap *priv;
-	BoxRec area;
-	int16_t dx, dy;
-
 	if (USE_WIDE_SPANS)
 		return USE_WIDE_SPANS > 0;
 
-	if (!drawable_gc_inplace_hint(drawable, gc))
-		return TRUE;
-
-	/* XXX check for GPU stalls on the gc (stipple, tile, etc) */
-
-	pixmap = get_drawable_pixmap(drawable);
-	priv = sna_pixmap(pixmap);
-	if (priv == NULL)
-		return FALSE;
-
-	if (DAMAGE_IS_ALL(priv->cpu_damage))
-		return FALSE;
-
-	if (priv->stride == 0 || priv->gpu_bo == NULL)
-		return FALSE;
-
-	if (!kgem_bo_is_busy(priv->gpu_bo))
-		return FALSE;
-
-	if (DAMAGE_IS_ALL(priv->gpu_damage))
-		return TRUE;
-
-	if (priv->gpu_damage == NULL)
-		return FALSE;
-
-	get_drawable_deltas(drawable, pixmap, &dx, &dy);
-	area = *extents;
-	area.x1 += dx;
-	area.x2 += dx;
-	area.y1 += dy;
-	area.y2 += dy;
-	DBG(("%s extents (%d, %d), (%d, %d)\n", __FUNCTION__,
-	     area.x1, area.y1, area.x2, area.y2));
-
-	return sna_damage_contains_box(priv->gpu_damage,
-				       &area) != PIXMAN_REGION_OUT;
+	return !drawable_gc_inplace_hint(drawable, gc);
 }
 
 static bool
@@ -6605,7 +6537,7 @@ sna_poly_line(DrawablePtr drawable, GCPtr gc,
 		     __FUNCTION__, (unsigned)color));
 
 		if (data.flags & 4) {
-			data.bo = sna_drawable_use_bo(drawable,
+			data.bo = sna_drawable_use_bo(drawable, true,
 						      &data.region.extents,
 						      &data.damage);
 			if (data.bo &&
@@ -6616,8 +6548,8 @@ sna_poly_line(DrawablePtr drawable, GCPtr gc,
 					      data.flags & 2))
 				return;
 		} else { /* !rectilinear */
-			if (use_zero_spans(drawable, gc, &data.region.extents) &&
-			    (data.bo = sna_drawable_use_bo(drawable,
+			if ((data.bo = sna_drawable_use_bo(drawable,
+							   use_zero_spans(drawable, gc, &data.region.extents),
 							   &data.region.extents,
 							   &data.damage)) &&
 			    sna_poly_zero_line_blt(drawable,
@@ -6630,7 +6562,8 @@ sna_poly_line(DrawablePtr drawable, GCPtr gc,
 		}
 	} else if (data.flags & 4) {
 		/* Try converting these to a set of rectangles instead */
-		data.bo = sna_drawable_use_bo(drawable, &data.region.extents, &data.damage);
+		data.bo = sna_drawable_use_bo(drawable, true,
+					      &data.region.extents, &data.damage);
 		if (data.bo) {
 			DDXPointRec p1, p2;
 			xRectangle *rect;
@@ -6701,8 +6634,9 @@ sna_poly_line(DrawablePtr drawable, GCPtr gc,
 	}
 
 spans_fallback:
-	if (use_wide_spans(drawable, gc, &data.region.extents) &&
-	    (data.bo = sna_drawable_use_bo(drawable, &data.region.extents, &data.damage))) {
+	if ((data.bo = sna_drawable_use_bo(drawable,
+					   use_wide_spans(drawable, gc, &data.region.extents),
+					   &data.region.extents, &data.damage))) {
 		DBG(("%s: converting line into spans\n", __FUNCTION__));
 		get_drawable_deltas(drawable, data.pixmap, &data.dx, &data.dy);
 		sna_gc(gc)->priv = &data;
@@ -7570,12 +7504,6 @@ sna_poly_segment(DrawablePtr drawable, GCPtr gc, int n, xSegment *seg)
 	if (!PM_IS_SOLID(drawable, gc->planemask))
 		goto fallback;
 
-	data.bo = sna_drawable_use_bo(drawable,
-				      &data.region.extents,
-				      &data.damage);
-	if (data.bo == NULL)
-		goto fallback;
-
 	if (gc->lineStyle != LineSolid || gc->lineWidth > 1)
 		goto spans_fallback;
 	if (gc_is_solid(gc, &color)) {
@@ -7583,14 +7511,20 @@ sna_poly_segment(DrawablePtr drawable, GCPtr gc, int n, xSegment *seg)
 		     __FUNCTION__, (unsigned)color, data.flags));
 
 		if (data.flags & 4) {
-			if (sna_poly_segment_blt(drawable,
+			if ((data.bo = sna_drawable_use_bo(drawable, true,
+							   &data.region.extents,
+							   &data.damage)) &&
+			     sna_poly_segment_blt(drawable,
 						 data.bo, data.damage,
 						 gc, color, n, seg,
 						 &data.region.extents,
 						 data.flags & 2))
 				return;
 		} else {
-			if (use_zero_spans(drawable, gc, &data.region.extents) &&
+			if ((data.bo = sna_drawable_use_bo(drawable,
+							   use_zero_spans(drawable, gc, &data.region.extents),
+							   &data.region.extents,
+							   &data.damage)) &&
 			    sna_poly_zero_segment_blt(drawable,
 						      data.bo, data.damage,
 						      gc, n, seg,
@@ -7603,6 +7537,12 @@ sna_poly_segment(DrawablePtr drawable, GCPtr gc, int n, xSegment *seg)
 		xRectangle *rect;
 		int i;
 
+		data.bo = sna_drawable_use_bo(drawable, true,
+					      &data.region.extents,
+					      &data.damage);
+		if (data.bo == NULL)
+			goto fallback;
+
 		DBG(("%s: converting to rectagnles\n", __FUNCTION__));
 
 		rect = malloc (n * sizeof (xRectangle));
@@ -7660,7 +7600,10 @@ sna_poly_segment(DrawablePtr drawable, GCPtr gc, int n, xSegment *seg)
 	}
 
 spans_fallback:
-	if (use_wide_spans(drawable, gc, &data.region.extents)) {
+	if ((data.bo = sna_drawable_use_bo(drawable,
+					   use_wide_spans(drawable, gc, &data.region.extents),
+					   &data.region.extents,
+					   &data.damage))) {
 		void (*line)(DrawablePtr, GCPtr, int, int, DDXPointPtr);
 		int i;
 
@@ -8280,7 +8223,8 @@ sna_poly_rectangle(DrawablePtr drawable, GCPtr gc, int n, xRectangle *r)
 	    PM_IS_SOLID(drawable, gc->planemask)) {
 		DBG(("%s: trying blt solid fill [%08lx] paths\n",
 		     __FUNCTION__, gc->fgPixel));
-		if ((bo = sna_drawable_use_bo(drawable, &region.extents, &damage)) &&
+		if ((bo = sna_drawable_use_bo(drawable, true,
+					      &region.extents, &damage)) &&
 		    sna_poly_rectangle_blt(drawable, bo, damage,
 					   gc, n, r, &region.extents, flags&2))
 			return;
@@ -8288,7 +8232,8 @@ sna_poly_rectangle(DrawablePtr drawable, GCPtr gc, int n, xRectangle *r)
 		/* Not a trivial outline, but we still maybe able to break it
 		 * down into simpler operations that we can accelerate.
 		 */
-		if (sna_drawable_use_bo(drawable, &region.extents, &damage)) {
+		if (sna_drawable_use_bo(drawable, true,
+					&region.extents, &damage)) {
 			miPolyRectangle(drawable, gc, n, r);
 			return;
 		}
@@ -8408,8 +8353,8 @@ sna_poly_arc(DrawablePtr drawable, GCPtr gc, int n, xArc *arc)
 	if (!PM_IS_SOLID(drawable, gc->planemask))
 		goto fallback;
 
-	if (use_wide_spans(drawable, gc, &data.region.extents) &&
-	    (data.bo = sna_drawable_use_bo(drawable,
+	if ((data.bo = sna_drawable_use_bo(drawable,
+					   use_wide_spans(drawable, gc, &data.region.extents),
 					   &data.region.extents, &data.damage))) {
 		uint32_t color;
 
@@ -8761,8 +8706,8 @@ sna_poly_fill_polygon(DrawablePtr draw, GCPtr gc,
 	if (!PM_IS_SOLID(draw, gc->planemask))
 		goto fallback;
 
-	if (use_wide_spans(draw, gc, &data.region.extents) &&
-	    (data.bo = sna_drawable_use_bo(draw,
+	if ((data.bo = sna_drawable_use_bo(draw,
+					   use_wide_spans(draw, gc, &data.region.extents),
 					   &data.region.extents,
 					   &data.damage))) {
 		uint32_t color;
@@ -10174,12 +10119,15 @@ sna_poly_fill_rect(DrawablePtr draw, GCPtr gc, int n, xRectangle *rect)
 		}
 	}
 
+	bo = sna_drawable_use_bo(draw, true, &region.extents, &damage);
+	if (bo == NULL)
+		goto fallback;
+
 	if (gc_is_solid(gc, &color)) {
 		DBG(("%s: solid fill [%08x], testing for blt\n",
 		     __FUNCTION__, color));
 
-		if ((bo = sna_drawable_use_bo(draw, &region.extents, &damage)) &&
-		    sna_poly_fill_rect_blt(draw,
+		if (sna_poly_fill_rect_blt(draw,
 					   bo, damage,
 					   gc, color, n, rect,
 					   &region.extents, flags & 2))
@@ -10187,16 +10135,14 @@ sna_poly_fill_rect(DrawablePtr draw, GCPtr gc, int n, xRectangle *rect)
 	} else if (gc->fillStyle == FillTiled) {
 		DBG(("%s: tiled fill, testing for blt\n", __FUNCTION__));
 
-		if ((bo = sna_drawable_use_bo(draw, &region.extents, &damage)) &&
-		    sna_poly_fill_rect_tiled_blt(draw, bo, damage,
+		if (sna_poly_fill_rect_tiled_blt(draw, bo, damage,
 						 gc, n, rect,
 						 &region.extents, flags & 2))
 			return;
 	} else {
 		DBG(("%s: stippled fill, testing for blt\n", __FUNCTION__));
 
-		if ((bo = sna_drawable_use_bo(draw, &region.extents, &damage)) &&
-		    sna_poly_fill_rect_stippled_blt(draw, bo, damage,
+		if (sna_poly_fill_rect_stippled_blt(draw, bo, damage,
 						    gc, n, rect,
 						    &region.extents, flags & 2))
 			return;
@@ -10330,8 +10276,7 @@ sna_poly_fill_arc(DrawablePtr draw, GCPtr gc, int n, xArc *arc)
 	if (!PM_IS_SOLID(draw, gc->planemask))
 		goto fallback;
 
-	if (use_wide_spans(draw, gc, &data.region.extents) &&
-	    (data.bo = sna_drawable_use_bo(draw,
+	if ((data.bo = sna_drawable_use_bo(draw, true,
 					   &data.region.extents,
 					   &data.damage))) {
 		uint32_t color;
@@ -10482,7 +10427,7 @@ sna_glyph_blt(DrawablePtr drawable, GCPtr gc,
 		return false;
 	}
 
-	bo = sna_drawable_use_bo(drawable, &clip->extents, &damage);
+	bo = sna_drawable_use_bo(drawable, true, &clip->extents, &damage);
 	if (bo == NULL)
 		return false;
 
@@ -11392,7 +11337,8 @@ sna_image_glyph(DrawablePtr drawable, GCPtr gc,
 	if (!PM_IS_SOLID(drawable, gc->planemask))
 		goto fallback;
 
-	if ((bo = sna_drawable_use_bo(drawable, &region.extents, &damage)) &&
+	if ((bo = sna_drawable_use_bo(drawable, true,
+				      &region.extents, &damage)) &&
 	    sna_reversed_glyph_blt(drawable, gc, x, y, n, info, base,
 				   bo, damage, &region,
 				   gc->fgPixel, gc->bgPixel, false))
@@ -11468,7 +11414,8 @@ sna_poly_glyph(DrawablePtr drawable, GCPtr gc,
 	if (!gc_is_solid(gc, &fg))
 		goto fallback;
 
-	if ((bo = sna_drawable_use_bo(drawable, &region.extents, &damage)) &&
+	if ((bo = sna_drawable_use_bo(drawable, true,
+				      &region.extents, &damage)) &&
 	    sna_reversed_glyph_blt(drawable, gc, x, y, n, info, base,
 				   bo, damage, &region, fg, -1, true))
 		goto out;
@@ -11505,7 +11452,7 @@ sna_push_pixels_solid_blt(GCPtr gc,
 	int n;
 	uint8_t rop = copy_ROP[gc->alu];
 
-	bo = sna_drawable_use_bo(drawable, &region->extents, &damage);
+	bo = sna_drawable_use_bo(drawable, true, &region->extents, &damage);
 	if (bo == NULL)
 		return false;
 
commit daac9a1d036d80ccce83438b49115a236a16bfb6
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Apr 27 16:50:28 2012 +0100

    sna: Micro-optimise common case of checking a single fenced bo
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

diff --git a/src/sna/kgem.c b/src/sna/kgem.c
index 4c4aa7c..29f0e29 100644
--- a/src/sna/kgem.c
+++ b/src/sna/kgem.c
@@ -2977,7 +2977,45 @@ bool kgem_check_bo(struct kgem *kgem, ...)
 	return true;
 }
 
-bool kgem_check_bo_fenced(struct kgem *kgem, ...)
+bool kgem_check_bo_fenced(struct kgem *kgem, struct kgem_bo *bo)
+{
+	uint32_t size;
+
+	if (bo->proxy)
+		bo = bo->proxy;
+	if (bo->exec) {
+		if (kgem->gen < 40 &&
+		    bo->tiling != I915_TILING_NONE &&
+		    (bo->exec->flags & EXEC_OBJECT_NEEDS_FENCE) == 0) {
+			if (kgem->nfence >= kgem->fence_max)
+				return false;
+
+			size = kgem->aperture_fenced;
+			size += kgem_bo_fenced_size(kgem, bo);
+			if (size > kgem->aperture_mappable)
+				return false;
+		}
+
+		return true;
+	}
+
+	if (kgem->aperture > kgem->aperture_low)
+		return false;
+
+	if (kgem->nexec >= KGEM_EXEC_SIZE(kgem) - 1)
+		return false;
+
+	if (kgem->gen < 40 &&
+	    bo->tiling != I915_TILING_NONE &&
+	    kgem->nfence >= kgem->fence_max)
+		return false;
+
+	size = kgem->aperture;
+	size += num_pages(bo);
+	return size <= kgem->aperture_high;
+}
+
+bool kgem_check_many_bo_fenced(struct kgem *kgem, ...)
 {
 	va_list ap;
 	struct kgem_bo *bo;
@@ -4165,7 +4203,7 @@ kgem_replace_bo(struct kgem *kgem,
 	kgem_set_mode(kgem, KGEM_BLT);
 	if (!kgem_check_batch(kgem, 8) ||
 	    !kgem_check_reloc(kgem, 2) ||
-	    !kgem_check_bo_fenced(kgem, src, dst, NULL)) {
+	    !kgem_check_many_bo_fenced(kgem, src, dst, NULL)) {
 		_kgem_submit(kgem);
 		_kgem_set_mode(kgem, KGEM_BLT);
 	}
diff --git a/src/sna/kgem.h b/src/sna/kgem.h
index 1235b83..4def6b1 100644
--- a/src/sna/kgem.h
+++ b/src/sna/kgem.h
@@ -344,7 +344,8 @@ static inline void kgem_advance_batch(struct kgem *kgem, int num_dwords)
 }
 
 bool kgem_check_bo(struct kgem *kgem, ...) __attribute__((sentinel(0)));
-bool kgem_check_bo_fenced(struct kgem *kgem, ...) __attribute__((sentinel(0)));
+bool kgem_check_bo_fenced(struct kgem *kgem, struct kgem_bo *bo);
+bool kgem_check_many_bo_fenced(struct kgem *kgem, ...) __attribute__((sentinel(0)));
 
 void _kgem_add_bo(struct kgem *kgem, struct kgem_bo *bo);
 static inline void kgem_add_bo(struct kgem *kgem, struct kgem_bo *bo)
diff --git a/src/sna/sna_accel.c b/src/sna/sna_accel.c
index dc084f0..a5c1648 100644
--- a/src/sna/sna_accel.c
+++ b/src/sna/sna_accel.c
@@ -2975,7 +2975,7 @@ sna_put_xybitmap_blt(DrawablePtr drawable, GCPtr gc, RegionPtr region,
 		void *ptr;
 
 		if (!kgem_check_batch(&sna->kgem, 8) ||
-		    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+		    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 		    !kgem_check_reloc(&sna->kgem, 2)) {
 			_kgem_submit(&sna->kgem);
 			_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -3103,7 +3103,7 @@ sna_put_xypixmap_blt(DrawablePtr drawable, GCPtr gc, RegionPtr region,
 			void *ptr;
 
 			if (!kgem_check_batch(&sna->kgem, 12) ||
-			    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+			    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 			    !kgem_check_reloc(&sna->kgem, 2)) {
 				_kgem_submit(&sna->kgem);
 				_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -5117,7 +5117,7 @@ sna_copy_bitmap_blt(DrawablePtr _bitmap, DrawablePtr drawable, GCPtr gc,
 		if (src_stride <= 128) {
 			src_stride = ALIGN(src_stride, 8) / 4;
 			if (!kgem_check_batch(&sna->kgem, 7+src_stride) ||
-			    !kgem_check_bo_fenced(&sna->kgem, arg->bo, NULL) ||
+			    !kgem_check_bo_fenced(&sna->kgem, arg->bo) ||
 			    !kgem_check_reloc(&sna->kgem, 1)) {
 				_kgem_submit(&sna->kgem);
 				_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -5159,7 +5159,7 @@ sna_copy_bitmap_blt(DrawablePtr _bitmap, DrawablePtr drawable, GCPtr gc,
 			void *ptr;
 
 			if (!kgem_check_batch(&sna->kgem, 8) ||
-			    !kgem_check_bo_fenced(&sna->kgem, arg->bo, NULL) ||
+			    !kgem_check_bo_fenced(&sna->kgem, arg->bo) ||
 			    !kgem_check_reloc(&sna->kgem, 2)) {
 				_kgem_submit(&sna->kgem);
 				_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -5277,7 +5277,7 @@ sna_copy_plane_blt(DrawablePtr source, DrawablePtr drawable, GCPtr gc,
 		     sx, sy, bx1, bx2));
 
 		if (!kgem_check_batch(&sna->kgem, 8) ||
-		    !kgem_check_bo_fenced(&sna->kgem, arg->bo, NULL) ||
+		    !kgem_check_bo_fenced(&sna->kgem, arg->bo) ||
 		    !kgem_check_reloc(&sna->kgem, 2)) {
 			_kgem_submit(&sna->kgem);
 			_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9195,7 +9195,7 @@ sna_poly_fill_rect_stippled_8x8_blt(DrawablePtr drawable,
 			     __FUNCTION__, r->x + dx, r->y + dy, r->width, r->height));
 
 			if (!kgem_check_batch(&sna->kgem, 9) ||
-			    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+			    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 			    !kgem_check_reloc(&sna->kgem, 1)) {
 				_kgem_submit(&sna->kgem);
 				_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9243,7 +9243,7 @@ sna_poly_fill_rect_stippled_8x8_blt(DrawablePtr drawable,
 					uint32_t *b;
 
 					if (!kgem_check_batch(&sna->kgem, 9) ||
-					    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+					    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 					    !kgem_check_reloc(&sna->kgem, 1)) {
 						_kgem_submit(&sna->kgem);
 						_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9293,7 +9293,7 @@ sna_poly_fill_rect_stippled_8x8_blt(DrawablePtr drawable,
 						uint32_t *b;
 
 						if (!kgem_check_batch(&sna->kgem, 9) ||
-						    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+						    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 						    !kgem_check_reloc(&sna->kgem, 1)) {
 							_kgem_submit(&sna->kgem);
 							_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9433,7 +9433,7 @@ sna_poly_fill_rect_stippled_1_blt(DrawablePtr drawable,
 			if (src_stride <= 128) {
 				src_stride = ALIGN(src_stride, 8) / 4;
 				if (!kgem_check_batch(&sna->kgem, 7+src_stride) ||
-				    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+				    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 				    !kgem_check_reloc(&sna->kgem, 1)) {
 					_kgem_submit(&sna->kgem);
 					_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9475,7 +9475,7 @@ sna_poly_fill_rect_stippled_1_blt(DrawablePtr drawable,
 				void *ptr;
 
 				if (!kgem_check_batch(&sna->kgem, 8) ||
-				    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+				    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 				    !kgem_check_reloc(&sna->kgem, 2)) {
 					_kgem_submit(&sna->kgem);
 					_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9575,7 +9575,7 @@ sna_poly_fill_rect_stippled_1_blt(DrawablePtr drawable,
 				if (src_stride <= 128) {
 					src_stride = ALIGN(src_stride, 8) / 4;
 					if (!kgem_check_batch(&sna->kgem, 7+src_stride) ||
-					    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+					    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 					    !kgem_check_reloc(&sna->kgem, 1)) {
 						_kgem_submit(&sna->kgem);
 						_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9614,7 +9614,7 @@ sna_poly_fill_rect_stippled_1_blt(DrawablePtr drawable,
 					} while (--bh);
 				} else {
 					if (!kgem_check_batch(&sna->kgem, 8) ||
-					    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+					    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 					    !kgem_check_reloc(&sna->kgem, 2)) {
 						_kgem_submit(&sna->kgem);
 						_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9715,7 +9715,7 @@ sna_poly_fill_rect_stippled_1_blt(DrawablePtr drawable,
 					if (src_stride <= 128) {
 						src_stride = ALIGN(src_stride, 8) / 4;
 						if (!kgem_check_batch(&sna->kgem, 7+src_stride) ||
-						    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+						    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 						    !kgem_check_reloc(&sna->kgem, 1)) {
 							_kgem_submit(&sna->kgem);
 							_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9754,7 +9754,7 @@ sna_poly_fill_rect_stippled_1_blt(DrawablePtr drawable,
 						} while (--bh);
 					} else {
 						if (!kgem_check_batch(&sna->kgem, 8) ||
-						    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+						    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 						    !kgem_check_reloc(&sna->kgem, 2)) {
 							_kgem_submit(&sna->kgem);
 							_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -9856,7 +9856,7 @@ sna_poly_fill_rect_stippled_n_box(struct sna *sna,
 			len = bw*bh;
 			len = ALIGN(len, 8) / 4;
 			if (!kgem_check_batch(&sna->kgem, 7+len) ||
-			    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+			    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 			    !kgem_check_reloc(&sna->kgem, 1)) {
 				_kgem_submit(&sna->kgem);
 				_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -10512,7 +10512,7 @@ sna_glyph_blt(DrawablePtr drawable, GCPtr gc,
 
 	kgem_set_mode(&sna->kgem, KGEM_BLT);
 	if (!kgem_check_batch(&sna->kgem, 16) ||
-	    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+	    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 	    !kgem_check_reloc(&sna->kgem, 1)) {
 		_kgem_submit(&sna->kgem);
 		_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -11180,7 +11180,7 @@ sna_reversed_glyph_blt(DrawablePtr drawable, GCPtr gc,
 
 	kgem_set_mode(&sna->kgem, KGEM_BLT);
 	if (!kgem_check_batch(&sna->kgem, 16) ||
-	    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+	    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 	    !kgem_check_reloc(&sna->kgem, 1)) {
 		_kgem_submit(&sna->kgem);
 		_kgem_set_mode(&sna->kgem, KGEM_BLT);
@@ -11549,7 +11549,7 @@ sna_push_pixels_solid_blt(GCPtr gc,
 		void *ptr;
 
 		if (!kgem_check_batch(&sna->kgem, 8) ||
-		    !kgem_check_bo_fenced(&sna->kgem, bo, NULL) ||
+		    !kgem_check_bo_fenced(&sna->kgem, bo) ||
 		    !kgem_check_reloc(&sna->kgem, 2)) {
 			_kgem_submit(&sna->kgem);
 			_kgem_set_mode(&sna->kgem, KGEM_BLT);
diff --git a/src/sna/sna_blt.c b/src/sna/sna_blt.c
index a81a145..82c61df 100644
--- a/src/sna/sna_blt.c
+++ b/src/sna/sna_blt.c
@@ -151,10 +151,10 @@ static bool sna_blt_fill_init(struct sna *sna,
 	blt->bpp = bpp;
 
 	kgem_set_mode(kgem, KGEM_BLT);
-	if (!kgem_check_bo_fenced(kgem, bo, NULL) ||
+	if (!kgem_check_bo_fenced(kgem, bo) ||
 	    !kgem_check_batch(kgem, 12)) {
 		_kgem_submit(kgem);
-		assert(kgem_check_bo_fenced(kgem, bo, NULL));
+		assert(kgem_check_bo_fenced(kgem, bo));
 		_kgem_set_mode(kgem, KGEM_BLT);
 	}
 
@@ -293,9 +293,9 @@ static Bool sna_blt_copy_init(struct sna *sna,
 	}
 
 	kgem_set_mode(kgem, KGEM_BLT);
-	if (!kgem_check_bo_fenced(kgem, src, dst, NULL)) {
+	if (!kgem_check_many_bo_fenced(kgem, src, dst, NULL)) {
 		_kgem_submit(kgem);
-		if (!kgem_check_bo_fenced(kgem, src, dst, NULL))
+		if (!kgem_check_many_bo_fenced(kgem, src, dst, NULL))
 			return FALSE;
 		_kgem_set_mode(kgem, KGEM_BLT);
 	}
@@ -345,9 +345,9 @@ static Bool sna_blt_alpha_fixup_init(struct sna *sna,
 	blt->pixel = alpha;
 
 	kgem_set_mode(kgem, KGEM_BLT);
-	if (!kgem_check_bo_fenced(kgem, src, dst, NULL)) {
+	if (!kgem_check_many_bo_fenced(kgem, src, dst, NULL)) {
 		_kgem_submit(kgem);
-		if (!kgem_check_bo_fenced(kgem, src, dst, NULL))
+		if (!kgem_check_many_bo_fenced(kgem, src, dst, NULL))
 			return FALSE;
 		_kgem_set_mode(kgem, KGEM_BLT);
 	}
@@ -1103,10 +1103,10 @@ prepare_blt_copy(struct sna *sna,
 	if (!kgem_bo_can_blt(&sna->kgem, priv->gpu_bo))
 		return FALSE;
 
-	if (!kgem_check_bo_fenced(&sna->kgem, op->dst.bo, priv->gpu_bo, NULL)) {
+	if (!kgem_check_many_bo_fenced(&sna->kgem, op->dst.bo, priv->gpu_bo, NULL)) {
 		_kgem_submit(&sna->kgem);
-		if (!kgem_check_bo_fenced(&sna->kgem,
-					  op->dst.bo, priv->gpu_bo, NULL))
+		if (!kgem_check_many_bo_fenced(&sna->kgem,
+					       op->dst.bo, priv->gpu_bo, NULL))
 			return FALSE;
 		_kgem_set_mode(&sna->kgem, KGEM_BLT);
 	}
@@ -1577,9 +1577,9 @@ sna_blt_composite(struct sna *sna,
 	if (width && height)
 		reduce_damage(tmp, dst_x, dst_y, width, height);
 
-	if (!kgem_check_bo_fenced(&sna->kgem, priv->gpu_bo, NULL)) {
+	if (!kgem_check_bo_fenced(&sna->kgem, priv->gpu_bo)) {
 		_kgem_submit(&sna->kgem);
-		assert(kgem_check_bo_fenced(&sna->kgem, priv->gpu_bo, NULL));
+		assert(kgem_check_bo_fenced(&sna->kgem, priv->gpu_bo));
 		_kgem_set_mode(&sna->kgem, KGEM_BLT);
 	}
 
@@ -1884,9 +1884,9 @@ static bool sna_blt_fill_box(struct sna *sna, uint8_t alu,
 	kgem_set_mode(kgem, KGEM_BLT);
 	if (!kgem_check_batch(kgem, 6) ||
 	    !kgem_check_reloc(kgem, 1) ||
-	    !kgem_check_bo_fenced(kgem, bo, NULL)) {
+	    !kgem_check_bo_fenced(kgem, bo)) {
 		_kgem_submit(kgem);
-		assert(kgem_check_bo_fenced(&sna->kgem, bo, NULL));
+		assert(kgem_check_bo_fenced(&sna->kgem, bo));
 		_kgem_set_mode(kgem, KGEM_BLT);
 	}
 
@@ -1957,10 +1957,10 @@ Bool sna_blt_fill_boxes(struct sna *sna, uint8_t alu,
 	}
 
 	kgem_set_mode(kgem, KGEM_BLT);
-	if (!kgem_check_bo_fenced(kgem, bo, NULL) ||
+	if (!kgem_check_bo_fenced(kgem, bo) ||
 	    !kgem_check_batch(kgem, 12)) {
 		_kgem_submit(kgem);
-		assert(kgem_check_bo_fenced(&sna->kgem, bo, NULL));
+		assert(kgem_check_bo_fenced(&sna->kgem, bo));
 		_kgem_set_mode(kgem, KGEM_BLT);
 	}
 
@@ -2122,9 +2122,9 @@ Bool sna_blt_copy_boxes(struct sna *sna, uint8_t alu,
 	kgem_set_mode(kgem, KGEM_BLT);
 	if (!kgem_check_batch(kgem, 8) ||
 	    !kgem_check_reloc(kgem, 2) ||
-	    !kgem_check_bo_fenced(kgem, dst_bo, src_bo, NULL)) {
+	    !kgem_check_many_bo_fenced(kgem, dst_bo, src_bo, NULL)) {
 		_kgem_submit(kgem);
-		if (!kgem_check_bo_fenced(kgem, dst_bo, src_bo, NULL))
+		if (!kgem_check_many_bo_fenced(kgem, dst_bo, src_bo, NULL))
 			return sna_tiling_blt_copy_boxes(sna, alu,
 							 src_bo, src_dx, src_dy,
 							 dst_bo, dst_dx, dst_dy,
diff --git a/src/sna/sna_io.c b/src/sna/sna_io.c
index 02a5c75..2539518 100644
--- a/src/sna/sna_io.c
+++ b/src/sna/sna_io.c
@@ -360,7 +360,7 @@ fallback:
 	if (kgem->nexec + 2 > KGEM_EXEC_SIZE(kgem) ||
 	    kgem->nreloc + 2 > KGEM_RELOC_SIZE(kgem) ||
 	    !kgem_check_batch(kgem, 8) ||
-	    !kgem_check_bo_fenced(kgem, dst_bo, src_bo, NULL)) {
+	    !kgem_check_many_bo_fenced(kgem, dst_bo, src_bo, NULL)) {
 		_kgem_submit(kgem);
 		_kgem_set_mode(kgem, KGEM_BLT);
 	}
@@ -732,7 +732,7 @@ tile:
 	if (kgem->nexec + 2 > KGEM_EXEC_SIZE(kgem) ||
 	    kgem->nreloc + 2 > KGEM_RELOC_SIZE(kgem) ||
 	    !kgem_check_batch(kgem, 8) ||
-	    !kgem_check_bo_fenced(kgem, dst_bo, NULL)) {
+	    !kgem_check_bo_fenced(kgem, dst_bo)) {
 		_kgem_submit(kgem);
 		_kgem_set_mode(kgem, KGEM_BLT);
 	}
@@ -969,7 +969,7 @@ fallback:
 	if (kgem->nexec + 2 > KGEM_EXEC_SIZE(kgem) ||
 	    kgem->nreloc + 2 > KGEM_RELOC_SIZE(kgem) ||
 	    !kgem_check_batch(kgem, 8) ||
-	    !kgem_check_bo_fenced(kgem, dst_bo, NULL)) {
+	    !kgem_check_bo_fenced(kgem, dst_bo)) {
 		_kgem_submit(kgem);
 		_kgem_set_mode(kgem, KGEM_BLT);
 	}


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