diff mbox

[28/30] drm/i915: Pass the fence register number to be written

Message ID 1302640318-23165-29-git-send-email-chris@chris-wilson.co.uk (mailing list archive)
State New, archived
Headers show

Commit Message

Chris Wilson April 12, 2011, 8:31 p.m. UTC 
This simplifies a later change where we want to successfully write (or
pipeline) the fence update prior to updating the bo.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem.c |   61 ++++++++++++++++++--------------------
 drivers/gpu/drm/i915/i915_reg.h |    1 +
 2 files changed, 30 insertions(+), 32 deletions(-)

Comments

Daniel Vetter April 13, 2011, 7:48 p.m. UTC | #1 
Reviewed-by: Daniel Vetter <daniel.vetter@ffwl.ch>
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index ad0c2b7..ca14a86 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2321,12 +2321,12 @@  i915_gpu_idle(struct drm_device *dev)
 }
 
 static int sandybridge_write_fence_reg(struct drm_i915_gem_object *obj,
-				       struct intel_ring_buffer *pipelined)
+				       struct intel_ring_buffer *pipelined,
+				       int reg)
 {
 	struct drm_device *dev = obj->base.dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	u32 size = obj->gtt_space->size;
-	int regnum = obj->fence_reg;
 	uint64_t val;
 
 	val = (uint64_t)((obj->gtt_offset + size - 4096) &
@@ -2346,24 +2346,24 @@  static int sandybridge_write_fence_reg(struct drm_i915_gem_object *obj,
 
 		intel_ring_emit(pipelined, MI_NOOP);
 		intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(2));
-		intel_ring_emit(pipelined, FENCE_REG_SANDYBRIDGE_0 + regnum*8);
+		intel_ring_emit(pipelined, FENCE_REG_SANDYBRIDGE_0 + reg*8);
 		intel_ring_emit(pipelined, (u32)val);
-		intel_ring_emit(pipelined, FENCE_REG_SANDYBRIDGE_0 + regnum*8 + 4);
+		intel_ring_emit(pipelined, FENCE_REG_SANDYBRIDGE_0 + reg*8 + 4);
 		intel_ring_emit(pipelined, (u32)(val >> 32));
 		intel_ring_advance(pipelined);
 	} else
-		I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + regnum * 8, val);
+		I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + reg * 8, val);
 
 	return 0;
 }
 
 static int i965_write_fence_reg(struct drm_i915_gem_object *obj,
-				struct intel_ring_buffer *pipelined)
+				struct intel_ring_buffer *pipelined,
+				int reg)
 {
 	struct drm_device *dev = obj->base.dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	u32 size = obj->gtt_space->size;
-	int regnum = obj->fence_reg;
 	uint64_t val;
 
 	val = (uint64_t)((obj->gtt_offset + size - 4096) &
@@ -2381,25 +2381,25 @@  static int i965_write_fence_reg(struct drm_i915_gem_object *obj,
 
 		intel_ring_emit(pipelined, MI_NOOP);
 		intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(2));
-		intel_ring_emit(pipelined, FENCE_REG_965_0 + regnum*8);
+		intel_ring_emit(pipelined, FENCE_REG_965_0 + reg*8);
 		intel_ring_emit(pipelined, (u32)val);
-		intel_ring_emit(pipelined, FENCE_REG_965_0 + regnum*8 + 4);
+		intel_ring_emit(pipelined, FENCE_REG_965_0 + reg*8 + 4);
 		intel_ring_emit(pipelined, (u32)(val >> 32));
 		intel_ring_advance(pipelined);
 	} else
-		I915_WRITE64(FENCE_REG_965_0 + regnum * 8, val);
+		I915_WRITE64(FENCE_REG_965_0 + reg * 8, val);
 
 	return 0;
 }
 
 static int i915_write_fence_reg(struct drm_i915_gem_object *obj,
-				struct intel_ring_buffer *pipelined)
+				struct intel_ring_buffer *pipelined,
+				int reg)
 {
 	struct drm_device *dev = obj->base.dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	u32 size = obj->gtt_space->size;
-	u32 fence_reg, val, pitch_val;
-	int tile_width;
+	int tile_width, val;
 
 	if (WARN((obj->gtt_offset & ~I915_FENCE_START_MASK) ||
 		 (size & -size) != size ||
@@ -2413,22 +2413,17 @@  static int i915_write_fence_reg(struct drm_i915_gem_object *obj,
 	else
 		tile_width = 512;
 
-	/* Note: pitch better be a power of two tile widths */
-	pitch_val = obj->stride / tile_width;
-	pitch_val = ffs(pitch_val) - 1;
-
 	val = obj->gtt_offset;
 	if (obj->tiling_mode == I915_TILING_Y)
 		val |= 1 << I830_FENCE_TILING_Y_SHIFT;
 	val |= I915_FENCE_SIZE_BITS(size);
-	val |= pitch_val << I830_FENCE_PITCH_SHIFT;
+	val |= I915_FENCE_PITCH_BITS(obj->stride / tile_width);
 	val |= I830_FENCE_REG_VALID;
 
-	fence_reg = obj->fence_reg;
-	if (fence_reg < 8)
-		fence_reg = FENCE_REG_830_0 + fence_reg * 4;
+	if (reg < 8)
+		reg = FENCE_REG_830_0 + reg * 4;
 	else
-		fence_reg = FENCE_REG_945_8 + (fence_reg - 8) * 4;
+		reg = FENCE_REG_945_8 + (reg - 8) * 4;
 
 	if (pipelined) {
 		int ret = intel_ring_begin(pipelined, 4);
@@ -2437,22 +2432,22 @@  static int i915_write_fence_reg(struct drm_i915_gem_object *obj,
 
 		intel_ring_emit(pipelined, MI_NOOP);
 		intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(1));
-		intel_ring_emit(pipelined, fence_reg);
+		intel_ring_emit(pipelined, reg);
 		intel_ring_emit(pipelined, val);
 		intel_ring_advance(pipelined);
 	} else
-		I915_WRITE(fence_reg, val);
+		I915_WRITE(reg, val);
 
 	return 0;
 }
 
 static int i830_write_fence_reg(struct drm_i915_gem_object *obj,
-				struct intel_ring_buffer *pipelined)
+				struct intel_ring_buffer *pipelined,
+				int reg)
 {
 	struct drm_device *dev = obj->base.dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	u32 size = obj->gtt_space->size;
-	int regnum = obj->fence_reg;
 	uint32_t val;
 	uint32_t pitch_val;
 
@@ -2480,11 +2475,11 @@  static int i830_write_fence_reg(struct drm_i915_gem_object *obj,
 
 		intel_ring_emit(pipelined, MI_NOOP);
 		intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(1));
-		intel_ring_emit(pipelined, FENCE_REG_830_0 + regnum*4);
+		intel_ring_emit(pipelined, FENCE_REG_830_0 + reg*4);
 		intel_ring_emit(pipelined, val);
 		intel_ring_advance(pipelined);
 	} else
-		I915_WRITE(FENCE_REG_830_0 + regnum * 4, val);
+		I915_WRITE(FENCE_REG_830_0 + reg * 4, val);
 
 	return 0;
 }
@@ -2625,6 +2620,7 @@  i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
 	struct drm_device *dev = obj->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_i915_fence_reg *reg;
+	int regnum;
 	int ret;
 
 	/* XXX disable pipelining. There are bugs. Shocking. */
@@ -2720,19 +2716,20 @@  i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
 
 update:
 	obj->tiling_changed = false;
+	regnum = reg - dev_priv->fence_regs;
 	switch (INTEL_INFO(dev)->gen) {
 	case 6:
-		ret = sandybridge_write_fence_reg(obj, pipelined);
+		ret = sandybridge_write_fence_reg(obj, pipelined, regnum);
 		break;
 	case 5:
 	case 4:
-		ret = i965_write_fence_reg(obj, pipelined);
+		ret = i965_write_fence_reg(obj, pipelined, regnum);
 		break;
 	case 3:
-		ret = i915_write_fence_reg(obj, pipelined);
+		ret = i915_write_fence_reg(obj, pipelined, regnum);
 		break;
 	case 2:
-		ret = i830_write_fence_reg(obj, pipelined);
+		ret = i830_write_fence_reg(obj, pipelined, regnum);
 		break;
 	}
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f39ac3a..024e01f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -264,6 +264,7 @@ 
 
 #define   I915_FENCE_START_MASK		0x0ff00000
 #define   I915_FENCE_SIZE_BITS(size)	((ffs((size) >> 20) - 1) << 8)
+#define   I915_FENCE_PITCH_BITS(stride)	((ffs(stride) - 1) << I830_FENCE_PITCH_SHIFT)
 
 #define FENCE_REG_965_0			0x03000
 #define   I965_FENCE_PITCH_SHIFT	2