From 8187a2b70e34c727a06617441f74f202b6fefaf9 Mon Sep 17 00:00:00 2001
From: Zou Nan hai <nanhai.zou@intel.com>
Date: Fri, 21 May 2010 09:08:55 +0800
Subject: [PATCH] drm/i915: introduce intel_ring_buffer structure (V2)

Introduces a more complete intel_ring_buffer structure with callbacks
for setup and management of a particular ringbuffer, and converts the
render ring buffer consumers to use it.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
Signed-off-by: Xiang Hai hao <haihao.xiang@intel.com>
[anholt: Fixed up whitespace fail and rebased against prep patches]
Signed-off-by: Eric Anholt <eric@anholt.net>
---
 drivers/gpu/drm/i915/i915_debugfs.c     |   6 +-
 drivers/gpu/drm/i915/i915_dma.c         |  58 +--
 drivers/gpu/drm/i915/i915_drv.c         |  29 +-
 drivers/gpu/drm/i915/i915_drv.h         |  80 +---
 drivers/gpu/drm/i915/i915_gem.c         |  76 ++-
 drivers/gpu/drm/i915/i915_irq.c         |  15 +-
 drivers/gpu/drm/i915/intel_display.c    |   1 -
 drivers/gpu/drm/i915/intel_overlay.c    |   8 -
 drivers/gpu/drm/i915/intel_ringbuffer.c | 588 ++++++++++++++----------
 drivers/gpu/drm/i915/intel_ringbuffer.h | 124 +++++
 include/drm/i915_drm.h                  |   4 +-
 11 files changed, 609 insertions(+), 380 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/intel_ringbuffer.h

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 488175c70c7d..4fddf094deb2 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -317,14 +317,14 @@ static int i915_ringbuffer_data(struct seq_file *m, void *data)
 	u8 *virt;
 	uint32_t *ptr, off;
 
-	if (!dev_priv->render_ring.ring_obj) {
+	if (!dev_priv->render_ring.gem_object) {
 		seq_printf(m, "No ringbuffer setup\n");
 		return 0;
 	}
 
 	virt = dev_priv->render_ring.virtual_start;
 
-	for (off = 0; off < dev_priv->render_ring.Size; off += 4) {
+	for (off = 0; off < dev_priv->render_ring.size; off += 4) {
 		ptr = (uint32_t *)(virt + off);
 		seq_printf(m, "%08x :  %08x\n", off, *ptr);
 	}
@@ -344,7 +344,7 @@ static int i915_ringbuffer_info(struct seq_file *m, void *data)
 
 	seq_printf(m, "RingHead :  %08x\n", head);
 	seq_printf(m, "RingTail :  %08x\n", tail);
-	seq_printf(m, "RingSize :  %08lx\n", dev_priv->render_ring.Size);
+	seq_printf(m, "RingSize :  %08lx\n", dev_priv->render_ring.size);
 	seq_printf(m, "Acthd :     %08x\n", I915_READ(IS_I965G(dev) ? ACTHD_I965 : ACTHD));
 
 	return 0;
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 6de7eace4319..2541428b2fe5 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -40,7 +40,6 @@
 #include <linux/vga_switcheroo.h>
 #include <linux/slab.h>
 
-
 /**
  * Sets up the hardware status page for devices that need a physical address
  * in the register.
@@ -56,10 +55,11 @@ static int i915_init_phys_hws(struct drm_device *dev)
 		DRM_ERROR("Can not allocate hardware status page\n");
 		return -ENOMEM;
 	}
-	dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
+	dev_priv->render_ring.status_page.page_addr
+		= dev_priv->status_page_dmah->vaddr;
 	dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
 
-	memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
+	memset(dev_priv->render_ring.status_page.page_addr, 0, PAGE_SIZE);
 
 	if (IS_I965G(dev))
 		dev_priv->dma_status_page |= (dev_priv->dma_status_page >> 28) &
@@ -95,7 +95,7 @@ void i915_kernel_lost_context(struct drm_device * dev)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_i915_master_private *master_priv;
-	drm_i915_ring_buffer_t *ring = &(dev_priv->render_ring);
+	struct intel_ring_buffer *ring = &dev_priv->render_ring;
 
 	/*
 	 * We should never lose context on the ring with modesetting
@@ -108,7 +108,7 @@ void i915_kernel_lost_context(struct drm_device * dev)
 	ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 	ring->space = ring->head - (ring->tail + 8);
 	if (ring->space < 0)
-		ring->space += ring->Size;
+		ring->space += ring->size;
 
 	if (!dev->primary->master)
 		return;
@@ -128,12 +128,7 @@ static int i915_dma_cleanup(struct drm_device * dev)
 	if (dev->irq_enabled)
 		drm_irq_uninstall(dev);
 
-	if (dev_priv->render_ring.virtual_start) {
-		drm_core_ioremapfree(&dev_priv->render_ring.map, dev);
-		dev_priv->render_ring.virtual_start = NULL;
-		dev_priv->render_ring.map.handle = NULL;
-		dev_priv->render_ring.map.size = 0;
-	}
+	intel_cleanup_ring_buffer(dev, &dev_priv->render_ring);
 
 	/* Clear the HWS virtual address at teardown */
 	if (I915_NEED_GFX_HWS(dev))
@@ -156,14 +151,14 @@ static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 	}
 
 	if (init->ring_size != 0) {
-		if (dev_priv->render_ring.ring_obj != NULL) {
+		if (dev_priv->render_ring.gem_object != NULL) {
 			i915_dma_cleanup(dev);
 			DRM_ERROR("Client tried to initialize ringbuffer in "
 				  "GEM mode\n");
 			return -EINVAL;
 		}
 
-		dev_priv->render_ring.Size = init->ring_size;
+		dev_priv->render_ring.size = init->ring_size;
 
 		dev_priv->render_ring.map.offset = init->ring_start;
 		dev_priv->render_ring.map.size = init->ring_size;
@@ -201,26 +196,29 @@ static int i915_dma_resume(struct drm_device * dev)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 
+	struct intel_ring_buffer *ring;
 	DRM_DEBUG_DRIVER("%s\n", __func__);
 
-	if (dev_priv->render_ring.map.handle == NULL) {
+	ring = &dev_priv->render_ring;
+
+	if (ring->map.handle == NULL) {
 		DRM_ERROR("can not ioremap virtual address for"
 			  " ring buffer\n");
 		return -ENOMEM;
 	}
 
 	/* Program Hardware Status Page */
-	if (!dev_priv->hw_status_page) {
+	if (!ring->status_page.page_addr) {
 		DRM_ERROR("Can not find hardware status page\n");
 		return -EINVAL;
 	}
 	DRM_DEBUG_DRIVER("hw status page @ %p\n",
-				dev_priv->hw_status_page);
-
-	if (dev_priv->status_gfx_addr != 0)
-		I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
+				ring->status_page.page_addr);
+	if (ring->status_page.gfx_addr != 0)
+		ring->setup_status_page(dev, ring);
 	else
 		I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
+
 	DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 
 	return 0;
@@ -330,9 +328,8 @@ static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	int i;
-	RING_LOCALS;
 
-	if ((dwords+1) * sizeof(int) >= dev_priv->render_ring.Size - 8)
+	if ((dwords+1) * sizeof(int) >= dev_priv->render_ring.size - 8)
 		return -EINVAL;
 
 	BEGIN_LP_RING((dwords+1)&~1);
@@ -365,9 +362,7 @@ i915_emit_box(struct drm_device *dev,
 	      struct drm_clip_rect *boxes,
 	      int i, int DR1, int DR4)
 {
-	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_clip_rect box = boxes[i];
-	RING_LOCALS;
 
 	if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 		DRM_ERROR("Bad box %d,%d..%d,%d\n",
@@ -404,7 +399,6 @@ static void i915_emit_breadcrumb(struct drm_device *dev)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
-	RING_LOCALS;
 
 	dev_priv->counter++;
 	if (dev_priv->counter > 0x7FFFFFFFUL)
@@ -458,10 +452,8 @@ static int i915_dispatch_batchbuffer(struct drm_device * dev,
 				     drm_i915_batchbuffer_t * batch,
 				     struct drm_clip_rect *cliprects)
 {
-	drm_i915_private_t *dev_priv = dev->dev_private;
 	int nbox = batch->num_cliprects;
 	int i = 0, count;
-	RING_LOCALS;
 
 	if ((batch->start | batch->used) & 0x7) {
 		DRM_ERROR("alignment");
@@ -510,7 +502,6 @@ static int i915_dispatch_flip(struct drm_device * dev)
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_i915_master_private *master_priv =
 		dev->primary->master->driver_priv;
-	RING_LOCALS;
 
 	if (!master_priv->sarea_priv)
 		return -EINVAL;
@@ -563,7 +554,8 @@ static int i915_quiescent(struct drm_device * dev)
 	drm_i915_private_t *dev_priv = dev->dev_private;
 
 	i915_kernel_lost_context(dev);
-	return i915_wait_ring(dev, dev_priv->render_ring.Size - 8, __func__);
+	return intel_wait_ring_buffer(dev, &dev_priv->render_ring,
+				      dev_priv->render_ring.size - 8);
 }
 
 static int i915_flush_ioctl(struct drm_device *dev, void *data,
@@ -805,6 +797,7 @@ static int i915_set_status_page(struct drm_device *dev, void *data,
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	drm_i915_hws_addr_t *hws = data;
+	struct intel_ring_buffer *ring = &dev_priv->render_ring;
 
 	if (!I915_NEED_GFX_HWS(dev))
 		return -EINVAL;
@@ -821,7 +814,7 @@ static int i915_set_status_page(struct drm_device *dev, void *data,
 
 	DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
 
-	dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
+	ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
 
 	dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 	dev_priv->hws_map.size = 4*1024;
@@ -837,10 +830,10 @@ static int i915_set_status_page(struct drm_device *dev, void *data,
 				" G33 hw status page\n");
 		return -ENOMEM;
 	}
-	dev_priv->hw_status_page = dev_priv->hws_map.handle;
+	ring->status_page.page_addr = dev_priv->hws_map.handle;
+	memset(ring->status_page.page_addr, 0, PAGE_SIZE);
+	I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
 
-	memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
-	I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 	DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 				dev_priv->status_gfx_addr);
 	DRM_DEBUG_DRIVER("load hws at %p\n",
@@ -1639,7 +1632,6 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 
 	spin_lock_init(&dev_priv->user_irq_lock);
 	spin_lock_init(&dev_priv->error_lock);
-	dev_priv->user_irq_refcount = 0;
 	dev_priv->trace_irq_seqno = 0;
 
 	ret = drm_vblank_init(dev, I915_NUM_PIPE);
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index a1814f65fdb4..c57c54f403da 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -388,33 +388,10 @@ int i965_reset(struct drm_device *dev, u8 flags)
 	 * switched away).
 	 */
 	if (drm_core_check_feature(dev, DRIVER_MODESET) ||
-	    !dev_priv->mm.suspended) {
-		drm_i915_ring_buffer_t *ring = &dev_priv->render_ring;
-		struct drm_gem_object *obj = ring->ring_obj;
-		struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);
+			!dev_priv->mm.suspended) {
+		struct intel_ring_buffer *ring = &dev_priv->render_ring;
 		dev_priv->mm.suspended = 0;
-
-		/* Stop the ring if it's running. */
-		I915_WRITE(PRB0_CTL, 0);
-		I915_WRITE(PRB0_TAIL, 0);
-		I915_WRITE(PRB0_HEAD, 0);
-
-		/* Initialize the ring. */
-		I915_WRITE(PRB0_START, obj_priv->gtt_offset);
-		I915_WRITE(PRB0_CTL,
-			   ((obj->size - 4096) & RING_NR_PAGES) |
-			   RING_NO_REPORT |
-			   RING_VALID);
-		if (!drm_core_check_feature(dev, DRIVER_MODESET))
-			i915_kernel_lost_context(dev);
-		else {
-			ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-			ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
-			ring->space = ring->head - (ring->tail + 8);
-			if (ring->space < 0)
-				ring->space += ring->Size;
-		}
-
+		ring->init(dev, ring);
 		mutex_unlock(&dev->struct_mutex);
 		drm_irq_uninstall(dev);
 		drm_irq_install(dev);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a39440cf1dee..6bb7933d49dc 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -31,8 +31,8 @@
 #define _I915_DRV_H_
 
 #include "i915_reg.h"
-#include "i915_drm.h"
 #include "intel_bios.h"
+#include "intel_ringbuffer.h"
 #include <linux/io-mapping.h>
 
 /* General customization:
@@ -92,16 +92,6 @@ struct drm_i915_gem_phys_object {
 	struct drm_gem_object *cur_obj;
 };
 
-typedef struct _drm_i915_ring_buffer {
-	unsigned long Size;
-	u8 *virtual_start;
-	int head;
-	int tail;
-	int space;
-	drm_local_map_t map;
-	struct drm_gem_object *ring_obj;
-} drm_i915_ring_buffer_t;
-
 struct mem_block {
 	struct mem_block *next;
 	struct mem_block *prev;
@@ -244,7 +234,7 @@ typedef struct drm_i915_private {
 	void __iomem *regs;
 
 	struct pci_dev *bridge_dev;
-	drm_i915_ring_buffer_t render_ring;
+	struct intel_ring_buffer render_ring;
 
 	drm_dma_handle_t *status_page_dmah;
 	void *hw_status_page;
@@ -270,8 +260,6 @@ typedef struct drm_i915_private {
 	atomic_t irq_received;
 	/** Protects user_irq_refcount and irq_mask_reg */
 	spinlock_t user_irq_lock;
-	/** Refcount for i915_user_irq_get() versus i915_user_irq_put(). */
-	int user_irq_refcount;
 	u32 trace_irq_seqno;
 	/** Cached value of IMR to avoid reads in updating the bitfield */
 	u32 irq_mask_reg;
@@ -832,9 +820,7 @@ extern int i915_irq_emit(struct drm_device *dev, void *data,
 			 struct drm_file *file_priv);
 extern int i915_irq_wait(struct drm_device *dev, void *data,
 			 struct drm_file *file_priv);
-void i915_user_irq_get(struct drm_device *dev);
 void i915_trace_irq_get(struct drm_device *dev, u32 seqno);
-void i915_user_irq_put(struct drm_device *dev);
 extern void i915_enable_interrupt (struct drm_device *dev);
 
 extern irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS);
@@ -853,8 +839,10 @@ extern int i915_vblank_swap(struct drm_device *dev, void *data,
 			    struct drm_file *file_priv);
 extern void i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask);
 extern void i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask);
-void ironlake_enable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask);
-void ironlake_disable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask);
+extern void ironlake_enable_graphics_irq(drm_i915_private_t *dev_priv,
+		u32 mask);
+extern void ironlake_disable_graphics_irq(drm_i915_private_t *dev_priv,
+		u32 mask);
 
 void
 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask);
@@ -962,8 +950,6 @@ void i915_gem_object_flush_write_domain(struct drm_gem_object *obj);
 
 void i915_gem_shrinker_init(void);
 void i915_gem_shrinker_exit(void);
-int i915_gem_init_pipe_control(struct drm_device *dev);
-void i915_gem_cleanup_pipe_control(struct drm_device *dev);
 
 /* i915_gem_tiling.c */
 void i915_gem_detect_bit_6_swizzle(struct drm_device *dev);
@@ -1014,16 +1000,6 @@ static inline void ironlake_opregion_gse_intr(struct drm_device *dev) { return;
 static inline void opregion_enable_asle(struct drm_device *dev) { return; }
 #endif
 
-/* intel_ringbuffer.c */
-extern void i915_gem_flush(struct drm_device *dev,
-			   uint32_t invalidate_domains,
-			   uint32_t flush_domains);
-extern int i915_dispatch_gem_execbuffer(struct drm_device *dev,
-					struct drm_i915_gem_execbuffer2 *exec,
-					struct drm_clip_rect *cliprects,
-					uint64_t exec_offset);
-extern uint32_t i915_ring_add_request(struct drm_device *dev);
-
 /* modesetting */
 extern void intel_modeset_init(struct drm_device *dev);
 extern void intel_modeset_cleanup(struct drm_device *dev);
@@ -1044,7 +1020,8 @@ extern int intel_trans_dp_port_sel (struct drm_crtc *crtc);
  * has access to the ring.
  */
 #define RING_LOCK_TEST_WITH_RETURN(dev, file_priv) do {			\
-	if (((drm_i915_private_t *)dev->dev_private)->render_ring.ring_obj == NULL) \
+	if (((drm_i915_private_t *)dev->dev_private)->render_ring.gem_object \
+			== NULL)					\
 		LOCK_TEST_WITH_RETURN(dev, file_priv);			\
 } while (0)
 
@@ -1060,32 +1037,27 @@ extern int intel_trans_dp_port_sel (struct drm_crtc *crtc);
 
 #define I915_VERBOSE 0
 
-#define RING_LOCALS	volatile unsigned int *ring_virt__;
-
-#define BEGIN_LP_RING(n) do {						\
-	int bytes__ = 4*(n);						\
-	if (I915_VERBOSE) DRM_DEBUG("BEGIN_LP_RING(%d)\n", (n));	\
-	/* a wrap must occur between instructions so pad beforehand */	\
-	if (unlikely (dev_priv->render_ring.tail + bytes__ > dev_priv->render_ring.Size)) \
-		i915_wrap_ring(dev);					\
-	if (unlikely (dev_priv->render_ring.space < bytes__))			\
-		i915_wait_ring(dev, bytes__, __func__);			\
-	ring_virt__ = (unsigned int *)					\
-	        (dev_priv->render_ring.virtual_start + dev_priv->render_ring.tail);	\
-	dev_priv->render_ring.tail += bytes__;					\
-	dev_priv->render_ring.tail &= dev_priv->render_ring.Size - 1;			\
-	dev_priv->render_ring.space -= bytes__;				\
+#define BEGIN_LP_RING(n)  do { \
+	drm_i915_private_t *dev_priv = dev->dev_private;                \
+	if (I915_VERBOSE)						\
+		DRM_DEBUG("   BEGIN_LP_RING %x\n", (int)(n));		\
+	intel_ring_begin(dev, &dev_priv->render_ring, 4*(n));		\
 } while (0)
 
-#define OUT_RING(n) do {						\
-	if (I915_VERBOSE) DRM_DEBUG("   OUT_RING %x\n", (int)(n));	\
-	*ring_virt__++ = (n);						\
+
+#define OUT_RING(x) do {						\
+	drm_i915_private_t *dev_priv = dev->dev_private;		\
+	if (I915_VERBOSE)						\
+		DRM_DEBUG("   OUT_RING %x\n", (int)(x));		\
+	intel_ring_emit(dev, &dev_priv->render_ring, x);		\
 } while (0)
 
 #define ADVANCE_LP_RING() do {						\
+	drm_i915_private_t *dev_priv = dev->dev_private;                \
 	if (I915_VERBOSE)						\
-		DRM_DEBUG("ADVANCE_LP_RING %x\n", dev_priv->render_ring.tail);	\
-	I915_WRITE(PRB0_TAIL, dev_priv->render_ring.tail);			\
+		DRM_DEBUG("ADVANCE_LP_RING %x\n",			\
+				dev_priv->render_ring.tail);		\
+	intel_ring_advance(dev, &dev_priv->render_ring);		\
 } while(0)
 
 /**
@@ -1103,14 +1075,12 @@ extern int intel_trans_dp_port_sel (struct drm_crtc *crtc);
  *
  * The area from dword 0x20 to 0x3ff is available for driver usage.
  */
-#define READ_HWSP(dev_priv, reg)  (((volatile u32*)(dev_priv->hw_status_page))[reg])
+#define READ_HWSP(dev_priv, reg)  (((volatile u32 *)\
+			(dev_priv->render_ring.status_page.page_addr))[reg])
 #define READ_BREADCRUMB(dev_priv) READ_HWSP(dev_priv, I915_BREADCRUMB_INDEX)
 #define I915_GEM_HWS_INDEX		0x20
 #define I915_BREADCRUMB_INDEX		0x21
 
-extern int i915_wrap_ring(struct drm_device * dev);
-extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
-
 #define INTEL_INFO(dev)	(((struct drm_i915_private *) (dev)->dev_private)->info)
 
 #define IS_I830(dev)		((dev)->pci_device == 0x3577)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 95dbe5628a25..58b6e814fae1 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1590,6 +1590,7 @@ i915_gem_process_flushing_list(struct drm_device *dev,
 		}
 	}
 }
+
 uint32_t
 i915_add_request(struct drm_device *dev, struct drm_file *file_priv,
 		 uint32_t flush_domains)
@@ -1607,7 +1608,8 @@ i915_add_request(struct drm_device *dev, struct drm_file *file_priv,
 	if (request == NULL)
 		return 0;
 
-	seqno = i915_ring_add_request(dev);
+	seqno = dev_priv->render_ring.add_request(dev, &dev_priv->render_ring,
+						  file_priv, flush_domains);
 
 	DRM_DEBUG_DRIVER("%d\n", seqno);
 
@@ -1645,10 +1647,8 @@ i915_add_request(struct drm_device *dev, struct drm_file *file_priv,
 static uint32_t
 i915_retire_commands(struct drm_device *dev)
 {
-	drm_i915_private_t *dev_priv = dev->dev_private;
 	uint32_t cmd = MI_FLUSH | MI_NO_WRITE_FLUSH;
 	uint32_t flush_domains = 0;
-	RING_LOCALS;
 
 	/* The sampler always gets flushed on i965 (sigh) */
 	if (IS_I965G(dev))
@@ -1746,7 +1746,9 @@ i915_gem_retire_requests(struct drm_device *dev)
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	uint32_t seqno;
 
-	if (!dev_priv->hw_status_page || list_empty(&dev_priv->mm.request_list))
+	struct intel_ring_buffer *ring = &(dev_priv->render_ring);
+	if (!ring->status_page.page_addr
+			|| list_empty(&dev_priv->mm.request_list))
 		return;
 
 	seqno = i915_get_gem_seqno(dev);
@@ -1773,7 +1775,8 @@ i915_gem_retire_requests(struct drm_device *dev)
 
 	if (unlikely (dev_priv->trace_irq_seqno &&
 		      i915_seqno_passed(dev_priv->trace_irq_seqno, seqno))) {
-		i915_user_irq_put(dev);
+
+		ring->user_irq_put(dev, ring);
 		dev_priv->trace_irq_seqno = 0;
 	}
 }
@@ -1803,6 +1806,7 @@ i915_do_wait_request(struct drm_device *dev, uint32_t seqno, int interruptible)
 	u32 ier;
 	int ret = 0;
 
+	struct intel_ring_buffer *ring = &dev_priv->render_ring;
 	BUG_ON(seqno == 0);
 
 	if (atomic_read(&dev_priv->mm.wedged))
@@ -1823,7 +1827,7 @@ i915_do_wait_request(struct drm_device *dev, uint32_t seqno, int interruptible)
 		trace_i915_gem_request_wait_begin(dev, seqno);
 
 		dev_priv->mm.waiting_gem_seqno = seqno;
-		i915_user_irq_get(dev);
+		ring->user_irq_get(dev, ring);
 		if (interruptible)
 			ret = wait_event_interruptible(dev_priv->irq_queue,
 				i915_seqno_passed(i915_get_gem_seqno(dev), seqno) ||
@@ -1833,7 +1837,7 @@ i915_do_wait_request(struct drm_device *dev, uint32_t seqno, int interruptible)
 				i915_seqno_passed(i915_get_gem_seqno(dev), seqno) ||
 				atomic_read(&dev_priv->mm.wedged));
 
-		i915_user_irq_put(dev);
+		ring->user_irq_put(dev, ring);
 		dev_priv->mm.waiting_gem_seqno = 0;
 
 		trace_i915_gem_request_wait_end(dev, seqno);
@@ -1867,6 +1871,19 @@ i915_wait_request(struct drm_device *dev, uint32_t seqno)
 }
 
 
+static void
+i915_gem_flush(struct drm_device *dev,
+	       uint32_t invalidate_domains,
+	       uint32_t flush_domains)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	if (flush_domains & I915_GEM_DOMAIN_CPU)
+		drm_agp_chipset_flush(dev);
+	dev_priv->render_ring.flush(dev, &dev_priv->render_ring,
+			invalidate_domains,
+			flush_domains);
+}
+
 /**
  * Ensures that all rendering to the object has completed and the object is
  * safe to unbind from the GTT or access from the CPU.
@@ -3820,7 +3837,11 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 #endif
 
 	/* Exec the batchbuffer */
-	ret = i915_dispatch_gem_execbuffer(dev, args, cliprects, exec_offset);
+	ret = dev_priv->render_ring.dispatch_gem_execbuffer(dev,
+							    &dev_priv->render_ring,
+							    args,
+							    cliprects,
+							    exec_offset);
 	if (ret) {
 		DRM_ERROR("dispatch failed %d\n", ret);
 		goto err;
@@ -4378,7 +4399,8 @@ i915_gem_idle(struct drm_device *dev)
 
 	mutex_lock(&dev->struct_mutex);
 
-	if (dev_priv->mm.suspended || dev_priv->render_ring.ring_obj == NULL) {
+	if (dev_priv->mm.suspended ||
+			dev_priv->render_ring.gem_object == NULL) {
 		mutex_unlock(&dev->struct_mutex);
 		return 0;
 	}
@@ -4420,7 +4442,7 @@ i915_gem_idle(struct drm_device *dev)
  * 965+ support PIPE_CONTROL commands, which provide finer grained control
  * over cache flushing.
  */
-int
+static int
 i915_gem_init_pipe_control(struct drm_device *dev)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
@@ -4459,7 +4481,8 @@ err:
 	return ret;
 }
 
-void
+
+static void
 i915_gem_cleanup_pipe_control(struct drm_device *dev)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
@@ -4476,6 +4499,37 @@ i915_gem_cleanup_pipe_control(struct drm_device *dev)
 	dev_priv->seqno_page = NULL;
 }
 
+int
+i915_gem_init_ringbuffer(struct drm_device *dev)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	int ret;
+	dev_priv->render_ring = render_ring;
+	if (!I915_NEED_GFX_HWS(dev)) {
+		dev_priv->render_ring.status_page.page_addr
+			= dev_priv->status_page_dmah->vaddr;
+		memset(dev_priv->render_ring.status_page.page_addr,
+				0, PAGE_SIZE);
+	}
+	if (HAS_PIPE_CONTROL(dev)) {
+		ret = i915_gem_init_pipe_control(dev);
+		if (ret)
+			return ret;
+	}
+	ret = intel_init_ring_buffer(dev, &dev_priv->render_ring);
+	return ret;
+}
+
+void
+i915_gem_cleanup_ringbuffer(struct drm_device *dev)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+
+	intel_cleanup_ring_buffer(dev, &dev_priv->render_ring);
+	if (HAS_PIPE_CONTROL(dev))
+		i915_gem_cleanup_pipe_control(dev);
+}
+
 int
 i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
 		       struct drm_file *file_priv)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index dd91c97de968..e07c643c8365 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -545,7 +545,8 @@ i915_ringbuffer_last_batch(struct drm_device *dev)
 	}
 
 	if (bbaddr == 0) {
-		ring = (u32 *)(dev_priv->render_ring.virtual_start + dev_priv->render_ring.Size);
+		ring = (u32 *)(dev_priv->render_ring.virtual_start
+				+ dev_priv->render_ring.size);
 		while (--ring >= (u32 *)dev_priv->render_ring.virtual_start) {
 			bbaddr = i915_get_bbaddr(dev, ring);
 			if (bbaddr)
@@ -639,7 +640,8 @@ static void i915_capture_error_state(struct drm_device *dev)
 	error->batchbuffer[1] = i915_error_object_create(dev, batchbuffer[1]);
 
 	/* Record the ringbuffer */
-	error->ringbuffer = i915_error_object_create(dev, dev_priv->render_ring.ring_obj);
+	error->ringbuffer = i915_error_object_create(dev,
+			dev_priv->render_ring.gem_object);
 
 	/* Record buffers on the active list. */
 	error->active_bo = NULL;
@@ -984,7 +986,6 @@ static int i915_emit_irq(struct drm_device * dev)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
-	RING_LOCALS;
 
 	i915_kernel_lost_context(dev);
 
@@ -1009,9 +1010,10 @@ static int i915_emit_irq(struct drm_device * dev)
 void i915_trace_irq_get(struct drm_device *dev, u32 seqno)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+	struct intel_ring_buffer *render_ring = &dev_priv->render_ring;
 
 	if (dev_priv->trace_irq_seqno == 0)
-		i915_user_irq_get(dev);
+		render_ring->user_irq_get(dev, render_ring);
 
 	dev_priv->trace_irq_seqno = seqno;
 }
@@ -1021,6 +1023,7 @@ static int i915_wait_irq(struct drm_device * dev, int irq_nr)
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 	struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 	int ret = 0;
+	struct intel_ring_buffer *render_ring = &dev_priv->render_ring;
 
 	DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr,
 		  READ_BREADCRUMB(dev_priv));
@@ -1034,10 +1037,10 @@ static int i915_wait_irq(struct drm_device * dev, int irq_nr)
 	if (master_priv->sarea_priv)
 		master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
 
-	i915_user_irq_get(dev);
+	render_ring->user_irq_get(dev, render_ring);
 	DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ,
 		    READ_BREADCRUMB(dev_priv) >= irq_nr);
-	i915_user_irq_put(dev);
+	render_ring->user_irq_put(dev, render_ring);
 
 	if (ret == -EBUSY) {
 		DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f469a84cacfd..b867f3c78408 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4629,7 +4629,6 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 	unsigned long flags;
 	int pipesrc_reg = (intel_crtc->pipe == 0) ? PIPEASRC : PIPEBSRC;
 	int ret, pipesrc;
-	RING_LOCALS;
 
 	work = kzalloc(sizeof *work, GFP_KERNEL);
 	if (work == NULL)
diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index b0e17b06eb6e..93da83782e5e 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -211,9 +211,7 @@ static void intel_overlay_unmap_regs_atomic(struct intel_overlay *overlay)
 static int intel_overlay_on(struct intel_overlay *overlay)
 {
 	struct drm_device *dev = overlay->dev;
-        drm_i915_private_t *dev_priv = dev->dev_private;
 	int ret;
-	RING_LOCALS;
 
 	BUG_ON(overlay->active);
 
@@ -248,7 +246,6 @@ static void intel_overlay_continue(struct intel_overlay *overlay,
         drm_i915_private_t *dev_priv = dev->dev_private;
 	u32 flip_addr = overlay->flip_addr;
 	u32 tmp;
-	RING_LOCALS;
 
 	BUG_ON(!overlay->active);
 
@@ -274,7 +271,6 @@ static int intel_overlay_wait_flip(struct intel_overlay *overlay)
         drm_i915_private_t *dev_priv = dev->dev_private;
 	int ret;
 	u32 tmp;
-	RING_LOCALS;
 
 	if (overlay->last_flip_req != 0) {
 		ret = i915_do_wait_request(dev, overlay->last_flip_req, 1);
@@ -314,9 +310,7 @@ static int intel_overlay_off(struct intel_overlay *overlay)
 {
 	u32 flip_addr = overlay->flip_addr;
 	struct drm_device *dev = overlay->dev;
-        drm_i915_private_t *dev_priv = dev->dev_private;
 	int ret;
-	RING_LOCALS;
 
 	BUG_ON(!overlay->active);
 
@@ -390,11 +384,9 @@ int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
 					 int interruptible)
 {
 	struct drm_device *dev = overlay->dev;
-        drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_gem_object *obj;
 	u32 flip_addr;
 	int ret;
-	RING_LOCALS;
 
 	if (overlay->hw_wedged == HW_WEDGED)
 		return -EIO;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 06058ddb4eed..5715c4d8cce9 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -29,30 +29,24 @@
 
 #include "drmP.h"
 #include "drm.h"
-#include "i915_drm.h"
 #include "i915_drv.h"
+#include "i915_drm.h"
 #include "i915_trace.h"
-#include "intel_drv.h"
 
-void
-i915_gem_flush(struct drm_device *dev,
-	       uint32_t invalidate_domains,
-	       uint32_t flush_domains)
+static void
+render_ring_flush(struct drm_device *dev,
+		struct intel_ring_buffer *ring,
+		u32	invalidate_domains,
+		u32	flush_domains)
 {
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	uint32_t cmd;
-	RING_LOCALS;
-
 #if WATCH_EXEC
 	DRM_INFO("%s: invalidate %08x flush %08x\n", __func__,
 		  invalidate_domains, flush_domains);
 #endif
-	trace_i915_gem_request_flush(dev, dev_priv->mm.next_gem_seqno,
+	u32 cmd;
+	trace_i915_gem_request_flush(dev, ring->next_seqno,
 				     invalidate_domains, flush_domains);
 
-	if (flush_domains & I915_GEM_DOMAIN_CPU)
-		drm_agp_chipset_flush(dev);
-
 	if ((invalidate_domains | flush_domains) & I915_GEM_GPU_DOMAINS) {
 		/*
 		 * read/write caches:
@@ -100,19 +94,130 @@ i915_gem_flush(struct drm_device *dev,
 #if WATCH_EXEC
 		DRM_INFO("%s: queue flush %08x to ring\n", __func__, cmd);
 #endif
-		BEGIN_LP_RING(2);
-		OUT_RING(cmd);
-		OUT_RING(MI_NOOP);
-		ADVANCE_LP_RING();
+		intel_ring_begin(dev, ring, 8);
+		intel_ring_emit(dev, ring, cmd);
+		intel_ring_emit(dev, ring, MI_NOOP);
+		intel_ring_advance(dev, ring);
+	}
+}
+
+static unsigned int render_ring_get_head(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	return I915_READ(PRB0_HEAD) & HEAD_ADDR;
+}
+
+static unsigned int render_ring_get_tail(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	return I915_READ(PRB0_TAIL) & TAIL_ADDR;
+}
+
+static unsigned int render_ring_get_active_head(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
+
+	return I915_READ(acthd_reg);
+}
+
+static void render_ring_advance_ring(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	I915_WRITE(PRB0_TAIL, ring->tail);
+}
+
+static int init_ring_common(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
+{
+	u32 head;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct drm_i915_gem_object *obj_priv;
+	obj_priv = to_intel_bo(ring->gem_object);
+
+	/* Stop the ring if it's running. */
+	I915_WRITE(ring->regs.ctl, 0);
+	I915_WRITE(ring->regs.head, 0);
+	I915_WRITE(ring->regs.tail, 0);
+
+	/* Initialize the ring. */
+	I915_WRITE(ring->regs.start, obj_priv->gtt_offset);
+	head = ring->get_head(dev, ring);
+
+	/* G45 ring initialization fails to reset head to zero */
+	if (head != 0) {
+		DRM_ERROR("%s head not reset to zero "
+				"ctl %08x head %08x tail %08x start %08x\n",
+				ring->name,
+				I915_READ(ring->regs.ctl),
+				I915_READ(ring->regs.head),
+				I915_READ(ring->regs.tail),
+				I915_READ(ring->regs.start));
+
+		I915_WRITE(ring->regs.head, 0);
+
+		DRM_ERROR("%s head forced to zero "
+				"ctl %08x head %08x tail %08x start %08x\n",
+				ring->name,
+				I915_READ(ring->regs.ctl),
+				I915_READ(ring->regs.head),
+				I915_READ(ring->regs.tail),
+				I915_READ(ring->regs.start));
 	}
 
+	I915_WRITE(ring->regs.ctl,
+			((ring->gem_object->size - PAGE_SIZE) & RING_NR_PAGES)
+			| RING_NO_REPORT | RING_VALID);
+
+	head = I915_READ(ring->regs.head) & HEAD_ADDR;
+	/* If the head is still not zero, the ring is dead */
+	if (head != 0) {
+		DRM_ERROR("%s initialization failed "
+				"ctl %08x head %08x tail %08x start %08x\n",
+				ring->name,
+				I915_READ(ring->regs.ctl),
+				I915_READ(ring->regs.head),
+				I915_READ(ring->regs.tail),
+				I915_READ(ring->regs.start));
+		return -EIO;
+	}
+
+	if (!drm_core_check_feature(dev, DRIVER_MODESET))
+		i915_kernel_lost_context(dev);
+	else {
+		ring->head = ring->get_head(dev, ring);
+		ring->tail = ring->get_tail(dev, ring);
+		ring->space = ring->head - (ring->tail + 8);
+		if (ring->space < 0)
+			ring->space += ring->size;
+	}
+	return 0;
 }
+
+static int init_render_ring(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	int ret = init_ring_common(dev, ring);
+	if (IS_I9XX(dev) && !IS_GEN3(dev)) {
+		I915_WRITE(MI_MODE,
+				(VS_TIMER_DISPATCH) << 16 | VS_TIMER_DISPATCH);
+	}
+	return ret;
+}
+
 #define PIPE_CONTROL_FLUSH(addr)					\
+do {									\
 	OUT_RING(GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE |		\
 		 PIPE_CONTROL_DEPTH_STALL);				\
 	OUT_RING(addr | PIPE_CONTROL_GLOBAL_GTT);			\
 	OUT_RING(0);							\
 	OUT_RING(0);							\
+} while (0)
 
 /**
  * Creates a new sequence number, emitting a write of it to the status page
@@ -122,21 +227,15 @@ i915_gem_flush(struct drm_device *dev,
  *
  * Returned sequence numbers are nonzero on success.
  */
-uint32_t
-i915_ring_add_request(struct drm_device *dev)
+static u32
+render_ring_add_request(struct drm_device *dev,
+		struct intel_ring_buffer *ring,
+		struct drm_file *file_priv,
+		u32 flush_domains)
 {
+	u32 seqno;
 	drm_i915_private_t *dev_priv = dev->dev_private;
-	uint32_t seqno;
-	RING_LOCALS;
-
-	/* Grab the seqno we're going to make this request be, and bump the
-	 * next (skipping 0 so it can be the reserved no-seqno value).
-	 */
-	seqno = dev_priv->mm.next_gem_seqno;
-	dev_priv->mm.next_gem_seqno++;
-	if (dev_priv->mm.next_gem_seqno == 0)
-		dev_priv->mm.next_gem_seqno++;
-
+	seqno = intel_ring_get_seqno(dev, ring);
 	if (HAS_PIPE_CONTROL(dev)) {
 		u32 scratch_addr = dev_priv->seqno_gfx_addr + 128;
 
@@ -181,13 +280,26 @@ i915_ring_add_request(struct drm_device *dev)
 	return seqno;
 }
 
-void i915_user_irq_get(struct drm_device *dev)
+static u32
+render_ring_get_gem_seqno(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
+{
+	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+	if (HAS_PIPE_CONTROL(dev))
+		return ((volatile u32 *)(dev_priv->seqno_page))[0];
+	else
+		return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
+}
+
+static void
+render_ring_get_user_irq(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 	unsigned long irqflags;
 
 	spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
-	if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1)) {
+	if (dev->irq_enabled && (++ring->user_irq_refcount == 1)) {
 		if (HAS_PCH_SPLIT(dev))
 			ironlake_enable_graphics_irq(dev_priv, GT_PIPE_NOTIFY);
 		else
@@ -196,14 +308,16 @@ void i915_user_irq_get(struct drm_device *dev)
 	spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
 }
 
-void i915_user_irq_put(struct drm_device *dev)
+static void
+render_ring_put_user_irq(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 	unsigned long irqflags;
 
 	spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
-	BUG_ON(dev->irq_enabled && dev_priv->user_irq_refcount <= 0);
-	if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0)) {
+	BUG_ON(dev->irq_enabled && ring->user_irq_refcount <= 0);
+	if (dev->irq_enabled && (--ring->user_irq_refcount == 0)) {
 		if (HAS_PCH_SPLIT(dev))
 			ironlake_disable_graphics_irq(dev_priv, GT_PIPE_NOTIFY);
 		else
@@ -212,20 +326,31 @@ void i915_user_irq_put(struct drm_device *dev)
 	spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
 }
 
-/** Dispatch a batchbuffer to the ring
- */
-int
-i915_dispatch_gem_execbuffer(struct drm_device *dev,
-			      struct drm_i915_gem_execbuffer2 *exec,
-			      struct drm_clip_rect *cliprects,
-			      uint64_t exec_offset)
+static void render_setup_status_page(struct drm_device *dev,
+	struct	intel_ring_buffer *ring)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	if (IS_GEN6(dev)) {
+		I915_WRITE(HWS_PGA_GEN6, ring->status_page.gfx_addr);
+		I915_READ(HWS_PGA_GEN6); /* posting read */
+	} else {
+		I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
+		I915_READ(HWS_PGA); /* posting read */
+	}
+
+}
+
+static int
+render_ring_dispatch_gem_execbuffer(struct drm_device *dev,
+		struct intel_ring_buffer *ring,
+		struct drm_i915_gem_execbuffer2 *exec,
+		struct drm_clip_rect *cliprects,
+		uint64_t exec_offset)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	int nbox = exec->num_cliprects;
 	int i = 0, count;
 	uint32_t exec_start, exec_len;
-	RING_LOCALS;
-
 	exec_start = (uint32_t) exec_offset + exec->batch_start_offset;
 	exec_len = (uint32_t) exec->batch_len;
 
@@ -242,74 +367,61 @@ i915_dispatch_gem_execbuffer(struct drm_device *dev,
 		}
 
 		if (IS_I830(dev) || IS_845G(dev)) {
-			BEGIN_LP_RING(4);
-			OUT_RING(MI_BATCH_BUFFER);
-			OUT_RING(exec_start | MI_BATCH_NON_SECURE);
-			OUT_RING(exec_start + exec_len - 4);
-			OUT_RING(0);
-			ADVANCE_LP_RING();
+			intel_ring_begin(dev, ring, 4);
+			intel_ring_emit(dev, ring, MI_BATCH_BUFFER);
+			intel_ring_emit(dev, ring,
+					exec_start | MI_BATCH_NON_SECURE);
+			intel_ring_emit(dev, ring, exec_start + exec_len - 4);
+			intel_ring_emit(dev, ring, 0);
 		} else {
-			BEGIN_LP_RING(2);
+			intel_ring_begin(dev, ring, 4);
 			if (IS_I965G(dev)) {
-				OUT_RING(MI_BATCH_BUFFER_START |
-					 (2 << 6) |
-					 MI_BATCH_NON_SECURE_I965);
-				OUT_RING(exec_start);
+				intel_ring_emit(dev, ring,
+						MI_BATCH_BUFFER_START | (2 << 6)
+						| MI_BATCH_NON_SECURE_I965);
+				intel_ring_emit(dev, ring, exec_start);
 			} else {
-				OUT_RING(MI_BATCH_BUFFER_START |
-					 (2 << 6));
-				OUT_RING(exec_start | MI_BATCH_NON_SECURE);
+				intel_ring_emit(dev, ring, MI_BATCH_BUFFER_START
+						| (2 << 6));
+				intel_ring_emit(dev, ring, exec_start |
+						MI_BATCH_NON_SECURE);
 			}
-			ADVANCE_LP_RING();
 		}
+		intel_ring_advance(dev, ring);
 	}
 
 	/* XXX breadcrumb */
 	return 0;
 }
 
-static void
-i915_gem_cleanup_hws(struct drm_device *dev)
+static void cleanup_status_page(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_gem_object *obj;
 	struct drm_i915_gem_object *obj_priv;
 
-	if (dev_priv->hws_obj == NULL)
+	obj = ring->status_page.obj;
+	if (obj == NULL)
 		return;
-
-	obj = dev_priv->hws_obj;
 	obj_priv = to_intel_bo(obj);
 
 	kunmap(obj_priv->pages[0]);
 	i915_gem_object_unpin(obj);
 	drm_gem_object_unreference(obj);
-	dev_priv->hws_obj = NULL;
+	ring->status_page.obj = NULL;
 
 	memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
-	dev_priv->hw_status_page = NULL;
-
-	if (HAS_PIPE_CONTROL(dev))
-		i915_gem_cleanup_pipe_control(dev);
-
-	/* Write high address into HWS_PGA when disabling. */
-	I915_WRITE(HWS_PGA, 0x1ffff000);
 }
 
-static int
-i915_gem_init_hws(struct drm_device *dev)
+static int init_status_page(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct drm_gem_object *obj;
 	struct drm_i915_gem_object *obj_priv;
 	int ret;
 
-	/* If we need a physical address for the status page, it's already
-	 * initialized at driver load time.
-	 */
-	if (!I915_NEED_GFX_HWS(dev))
-		return 0;
-
 	obj = i915_gem_alloc_object(dev, 4096);
 	if (obj == NULL) {
 		DRM_ERROR("Failed to allocate status page\n");
@@ -321,36 +433,21 @@ i915_gem_init_hws(struct drm_device *dev)
 
 	ret = i915_gem_object_pin(obj, 4096);
 	if (ret != 0) {
-		drm_gem_object_unreference(obj);
 		goto err_unref;
 	}
 
-	dev_priv->status_gfx_addr = obj_priv->gtt_offset;
-
-	dev_priv->hw_status_page = kmap(obj_priv->pages[0]);
-	if (dev_priv->hw_status_page == NULL) {
-		DRM_ERROR("Failed to map status page.\n");
+	ring->status_page.gfx_addr = obj_priv->gtt_offset;
+	ring->status_page.page_addr = kmap(obj_priv->pages[0]);
+	if (ring->status_page.page_addr == NULL) {
 		memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
-		ret = -EINVAL;
 		goto err_unpin;
 	}
+	ring->status_page.obj = obj;
+	memset(ring->status_page.page_addr, 0, PAGE_SIZE);
 
-	if (HAS_PIPE_CONTROL(dev)) {
-		ret = i915_gem_init_pipe_control(dev);
-		if (ret)
-			goto err_unpin;
-	}
-
-	dev_priv->hws_obj = obj;
-	memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
-	if (IS_GEN6(dev)) {
-		I915_WRITE(HWS_PGA_GEN6, dev_priv->status_gfx_addr);
-		I915_READ(HWS_PGA_GEN6); /* posting read */
-	} else {
-		I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
-		I915_READ(HWS_PGA); /* posting read */
-	}
-	DRM_DEBUG_DRIVER("hws offset: 0x%08x\n", dev_priv->status_gfx_addr);
+	ring->setup_status_page(dev, ring);
+	DRM_DEBUG_DRIVER("%s hws offset: 0x%08x\n",
+			ring->name, ring->status_page.gfx_addr);
 
 	return 0;
 
@@ -359,43 +456,42 @@ err_unpin:
 err_unref:
 	drm_gem_object_unreference(obj);
 err:
-	return 0;
+	return ret;
 }
 
-int
-i915_gem_init_ringbuffer(struct drm_device *dev)
+
+int intel_init_ring_buffer(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
 {
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	struct drm_gem_object *obj;
-	struct drm_i915_gem_object *obj_priv;
-	drm_i915_ring_buffer_t *ring = &dev_priv->render_ring;
 	int ret;
-	u32 head;
+	struct drm_i915_gem_object *obj_priv;
+	struct drm_gem_object *obj;
+	ring->dev = dev;
 
-	ret = i915_gem_init_hws(dev);
-	if (ret != 0)
-		return ret;
+	if (I915_NEED_GFX_HWS(dev)) {
+		ret = init_status_page(dev, ring);
+		if (ret)
+			return ret;
+	}
 
-	obj = i915_gem_alloc_object(dev, 128 * 1024);
+	obj = i915_gem_alloc_object(dev, ring->size);
 	if (obj == NULL) {
 		DRM_ERROR("Failed to allocate ringbuffer\n");
-		i915_gem_cleanup_hws(dev);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto cleanup;
 	}
-	obj_priv = to_intel_bo(obj);
 
-	ret = i915_gem_object_pin(obj, 4096);
+	ring->gem_object = obj;
+
+	ret = i915_gem_object_pin(obj, ring->alignment);
 	if (ret != 0) {
 		drm_gem_object_unreference(obj);
-		i915_gem_cleanup_hws(dev);
-		return ret;
+		goto cleanup;
 	}
 
-	/* Set up the kernel mapping for the ring. */
-	ring->Size = obj->size;
-
+	obj_priv = to_intel_bo(obj);
+	ring->map.size = ring->size;
 	ring->map.offset = dev->agp->base + obj_priv->gtt_offset;
-	ring->map.size = obj->size;
 	ring->map.type = 0;
 	ring->map.flags = 0;
 	ring->map.mtrr = 0;
@@ -403,143 +499,85 @@ i915_gem_init_ringbuffer(struct drm_device *dev)
 	drm_core_ioremap_wc(&ring->map, dev);
 	if (ring->map.handle == NULL) {
 		DRM_ERROR("Failed to map ringbuffer.\n");
-		memset(&dev_priv->render_ring, 0, sizeof(dev_priv->render_ring));
 		i915_gem_object_unpin(obj);
 		drm_gem_object_unreference(obj);
-		i915_gem_cleanup_hws(dev);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto cleanup;
 	}
-	ring->ring_obj = obj;
+
 	ring->virtual_start = ring->map.handle;
-
-	/* Stop the ring if it's running. */
-	I915_WRITE(PRB0_CTL, 0);
-	I915_WRITE(PRB0_TAIL, 0);
-	I915_WRITE(PRB0_HEAD, 0);
-
-	/* Initialize the ring. */
-	I915_WRITE(PRB0_START, obj_priv->gtt_offset);
-	head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-
-	/* G45 ring initialization fails to reset head to zero */
-	if (head != 0) {
-		DRM_ERROR("Ring head not reset to zero "
-			  "ctl %08x head %08x tail %08x start %08x\n",
-			  I915_READ(PRB0_CTL),
-			  I915_READ(PRB0_HEAD),
-			  I915_READ(PRB0_TAIL),
-			  I915_READ(PRB0_START));
-		I915_WRITE(PRB0_HEAD, 0);
-
-		DRM_ERROR("Ring head forced to zero "
-			  "ctl %08x head %08x tail %08x start %08x\n",
-			  I915_READ(PRB0_CTL),
-			  I915_READ(PRB0_HEAD),
-			  I915_READ(PRB0_TAIL),
-			  I915_READ(PRB0_START));
+	ret = ring->init(dev, ring);
+	if (ret != 0) {
+		intel_cleanup_ring_buffer(dev, ring);
+		return ret;
 	}
 
-	I915_WRITE(PRB0_CTL,
-		   ((obj->size - 4096) & RING_NR_PAGES) |
-		   RING_NO_REPORT |
-		   RING_VALID);
-
-	head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-
-	/* If the head is still not zero, the ring is dead */
-	if (head != 0) {
-		DRM_ERROR("Ring initialization failed "
-			  "ctl %08x head %08x tail %08x start %08x\n",
-			  I915_READ(PRB0_CTL),
-			  I915_READ(PRB0_HEAD),
-			  I915_READ(PRB0_TAIL),
-			  I915_READ(PRB0_START));
-		return -EIO;
-	}
-
-	/* Update our cache of the ring state */
 	if (!drm_core_check_feature(dev, DRIVER_MODESET))
 		i915_kernel_lost_context(dev);
 	else {
-		ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-		ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
+		ring->head = ring->get_head(dev, ring);
+		ring->tail = ring->get_tail(dev, ring);
 		ring->space = ring->head - (ring->tail + 8);
 		if (ring->space < 0)
-			ring->space += ring->Size;
+			ring->space += ring->size;
 	}
-
-	if (IS_I9XX(dev) && !IS_GEN3(dev)) {
-		I915_WRITE(MI_MODE,
-			   (VS_TIMER_DISPATCH) << 16 | VS_TIMER_DISPATCH);
-	}
-
-	return 0;
+	INIT_LIST_HEAD(&ring->active_list);
+	INIT_LIST_HEAD(&ring->request_list);
+	return ret;
+cleanup:
+	cleanup_status_page(dev, ring);
+	return ret;
 }
 
-void
-i915_gem_cleanup_ringbuffer(struct drm_device *dev)
+void intel_cleanup_ring_buffer(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
 {
-	drm_i915_private_t *dev_priv = dev->dev_private;
-
-	if (dev_priv->render_ring.ring_obj == NULL)
+	if (ring->gem_object == NULL)
 		return;
 
-	drm_core_ioremapfree(&dev_priv->render_ring.map, dev);
+	drm_core_ioremapfree(&ring->map, dev);
 
-	i915_gem_object_unpin(dev_priv->render_ring.ring_obj);
-	drm_gem_object_unreference(dev_priv->render_ring.ring_obj);
-	dev_priv->render_ring.ring_obj = NULL;
-	memset(&dev_priv->render_ring, 0, sizeof(dev_priv->render_ring));
-
-	i915_gem_cleanup_hws(dev);
+	i915_gem_object_unpin(ring->gem_object);
+	drm_gem_object_unreference(ring->gem_object);
+	ring->gem_object = NULL;
+	cleanup_status_page(dev, ring);
 }
 
-/* As a ringbuffer is only allowed to wrap between instructions, fill
- * the tail with NOOPs.
- */
-int i915_wrap_ring(struct drm_device *dev)
+int intel_wrap_ring_buffer(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
 {
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	volatile unsigned int *virt;
+	unsigned int *virt;
 	int rem;
+	rem = ring->size - ring->tail;
 
-	rem = dev_priv->render_ring.Size - dev_priv->render_ring.tail;
-	if (dev_priv->render_ring.space < rem) {
-		int ret = i915_wait_ring(dev, rem, __func__);
+	if (ring->space < rem) {
+		int ret = intel_wait_ring_buffer(dev, ring, rem);
 		if (ret)
 			return ret;
 	}
-	dev_priv->render_ring.space -= rem;
 
-	virt = (unsigned int *)
-		(dev_priv->render_ring.virtual_start + dev_priv->render_ring.tail);
+	virt = (unsigned int *)(ring->virtual_start + ring->tail);
 	rem /= 4;
 	while (rem--)
 		*virt++ = MI_NOOP;
 
-	dev_priv->render_ring.tail = 0;
+	ring->tail = 0;
 
 	return 0;
 }
 
-int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
+int intel_wait_ring_buffer(struct drm_device *dev,
+		struct intel_ring_buffer *ring, int n)
 {
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	drm_i915_ring_buffer_t *ring = &(dev_priv->render_ring);
-	u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
-	u32 last_acthd = I915_READ(acthd_reg);
-	u32 acthd;
-	u32 last_head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-	int i;
+	unsigned long end;
 
 	trace_i915_ring_wait_begin (dev);
-
-	for (i = 0; i < 100000; i++) {
-		ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-		acthd = I915_READ(acthd_reg);
+	end = jiffies + 3 * HZ;
+	do {
+		ring->head = ring->get_head(dev, ring);
 		ring->space = ring->head - (ring->tail + 8);
 		if (ring->space < 0)
-			ring->space += ring->Size;
+			ring->space += ring->size;
 		if (ring->space >= n) {
 			trace_i915_ring_wait_end (dev);
 			return 0;
@@ -550,19 +588,97 @@ int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
 			if (master_priv->sarea_priv)
 				master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
 		}
-
-
-		if (ring->head != last_head)
-			i = 0;
-		if (acthd != last_acthd)
-			i = 0;
-
-		last_head = ring->head;
-		last_acthd = acthd;
-		msleep_interruptible(10);
-
-	}
-
+		yield();
+	} while (!time_after(jiffies, end));
 	trace_i915_ring_wait_end (dev);
 	return -EBUSY;
 }
+
+void intel_ring_begin(struct drm_device *dev,
+		struct intel_ring_buffer *ring, int n)
+{
+	if (unlikely(ring->tail + n > ring->size))
+		intel_wrap_ring_buffer(dev, ring);
+	if (unlikely(ring->space < n))
+		intel_wait_ring_buffer(dev, ring, n);
+}
+
+void intel_ring_emit(struct drm_device *dev,
+		struct intel_ring_buffer *ring, unsigned int data)
+{
+	unsigned int *virt = ring->virtual_start + ring->tail;
+	*virt = data;
+	ring->tail += 4;
+	ring->tail &= ring->size - 1;
+	ring->space -= 4;
+}
+
+void intel_ring_advance(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
+{
+	ring->advance_ring(dev, ring);
+}
+
+void intel_fill_struct(struct drm_device *dev,
+		struct intel_ring_buffer *ring,
+		void *data,
+		unsigned int len)
+{
+	unsigned int *virt = ring->virtual_start + ring->tail;
+	BUG_ON((len&~(4-1)) != 0);
+	intel_ring_begin(dev, ring, len);
+	memcpy(virt, data, len);
+	ring->tail += len;
+	ring->tail &= ring->size - 1;
+	ring->space -= len;
+	intel_ring_advance(dev, ring);
+}
+
+u32 intel_ring_get_seqno(struct drm_device *dev,
+		struct intel_ring_buffer *ring)
+{
+	u32 seqno;
+	seqno = ring->next_seqno;
+
+	/* reserve 0 for non-seqno */
+	if (++ring->next_seqno == 0)
+		ring->next_seqno = 1;
+	return seqno;
+}
+
+struct intel_ring_buffer render_ring = {
+	.name			= "render ring",
+	.regs                   = {
+		.ctl = PRB0_CTL,
+		.head = PRB0_HEAD,
+		.tail = PRB0_TAIL,
+		.start = PRB0_START
+	},
+	.ring_flag		= I915_EXEC_RENDER,
+	.size			= 32 * PAGE_SIZE,
+	.alignment		= PAGE_SIZE,
+	.virtual_start		= NULL,
+	.dev			= NULL,
+	.gem_object		= NULL,
+	.head			= 0,
+	.tail			= 0,
+	.space			= 0,
+	.next_seqno		= 1,
+	.user_irq_refcount	= 0,
+	.irq_gem_seqno		= 0,
+	.waiting_gem_seqno	= 0,
+	.setup_status_page	= render_setup_status_page,
+	.init			= init_render_ring,
+	.get_head		= render_ring_get_head,
+	.get_tail		= render_ring_get_tail,
+	.get_active_head	= render_ring_get_active_head,
+	.advance_ring		= render_ring_advance_ring,
+	.flush			= render_ring_flush,
+	.add_request		= render_ring_add_request,
+	.get_gem_seqno		= render_ring_get_gem_seqno,
+	.user_irq_get		= render_ring_get_user_irq,
+	.user_irq_put		= render_ring_put_user_irq,
+	.dispatch_gem_execbuffer = render_ring_dispatch_gem_execbuffer,
+	.status_page		= {NULL, 0, NULL},
+	.map			= {0,}
+};
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
new file mode 100644
index 000000000000..d5568d3766de
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -0,0 +1,124 @@
+#ifndef _INTEL_RINGBUFFER_H_
+#define _INTEL_RINGBUFFER_H_
+
+struct  intel_hw_status_page {
+	void		*page_addr;
+	unsigned int	gfx_addr;
+	struct		drm_gem_object *obj;
+};
+
+struct drm_i915_gem_execbuffer2;
+struct  intel_ring_buffer {
+	const char	*name;
+	struct		ring_regs {
+			u32 ctl;
+			u32 head;
+			u32 tail;
+			u32 start;
+	} regs;
+	unsigned int	ring_flag;
+	unsigned long	size;
+	unsigned int	alignment;
+	void		*virtual_start;
+	struct		drm_device *dev;
+	struct		drm_gem_object *gem_object;
+
+	unsigned int	head;
+	unsigned int	tail;
+	unsigned int	space;
+	u32		next_seqno;
+	struct intel_hw_status_page status_page;
+
+	u32		irq_gem_seqno;		/* last seq seem at irq time */
+	u32		waiting_gem_seqno;
+	int		user_irq_refcount;
+	void		(*user_irq_get)(struct drm_device *dev,
+			struct intel_ring_buffer *ring);
+	void		(*user_irq_put)(struct drm_device *dev,
+			struct intel_ring_buffer *ring);
+	void		(*setup_status_page)(struct drm_device *dev,
+			struct	intel_ring_buffer *ring);
+
+	int		(*init)(struct drm_device *dev,
+			struct intel_ring_buffer *ring);
+
+	unsigned int	(*get_head)(struct drm_device *dev,
+			struct intel_ring_buffer *ring);
+	unsigned int	(*get_tail)(struct drm_device *dev,
+			struct intel_ring_buffer *ring);
+	unsigned int	(*get_active_head)(struct drm_device *dev,
+			struct intel_ring_buffer *ring);
+	void		(*advance_ring)(struct drm_device *dev,
+			struct intel_ring_buffer *ring);
+	void		(*flush)(struct drm_device *dev,
+			struct intel_ring_buffer *ring,
+			u32	invalidate_domains,
+			u32	flush_domains);
+	u32		(*add_request)(struct drm_device *dev,
+			struct intel_ring_buffer *ring,
+			struct drm_file *file_priv,
+			u32 flush_domains);
+	u32		(*get_gem_seqno)(struct drm_device *dev,
+			struct intel_ring_buffer *ring);
+	int		(*dispatch_gem_execbuffer)(struct drm_device *dev,
+			struct intel_ring_buffer *ring,
+			struct drm_i915_gem_execbuffer2 *exec,
+			struct drm_clip_rect *cliprects,
+			uint64_t exec_offset);
+
+	/**
+	 * List of objects currently involved in rendering from the
+	 * ringbuffer.
+	 *
+	 * Includes buffers having the contents of their GPU caches
+	 * flushed, not necessarily primitives.  last_rendering_seqno
+	 * represents when the rendering involved will be completed.
+	 *
+	 * A reference is held on the buffer while on this list.
+	 */
+	struct list_head active_list;
+
+	/**
+	 * List of breadcrumbs associated with GPU requests currently
+	 * outstanding.
+	 */
+	struct list_head request_list;
+
+	wait_queue_head_t irq_queue;
+	drm_local_map_t map;
+};
+
+static inline u32
+intel_read_status_page(struct intel_ring_buffer *ring,
+		int reg)
+{
+	u32 *regs = ring->status_page.page_addr;
+	return regs[reg];
+}
+
+int intel_init_ring_buffer(struct drm_device *dev,
+		struct intel_ring_buffer *ring);
+void intel_cleanup_ring_buffer(struct drm_device *dev,
+		struct intel_ring_buffer *ring);
+int intel_wait_ring_buffer(struct drm_device *dev,
+		struct intel_ring_buffer *ring, int n);
+int intel_wrap_ring_buffer(struct drm_device *dev,
+		struct intel_ring_buffer *ring);
+void intel_ring_begin(struct drm_device *dev,
+		struct intel_ring_buffer *ring, int n);
+void intel_ring_emit(struct drm_device *dev,
+		struct intel_ring_buffer *ring, u32 data);
+void intel_fill_struct(struct drm_device *dev,
+		struct intel_ring_buffer *ring,
+		void *data,
+		unsigned int len);
+void intel_ring_advance(struct drm_device *dev,
+		struct intel_ring_buffer *ring);
+
+u32 intel_ring_get_seqno(struct drm_device *dev,
+		struct intel_ring_buffer *ring);
+
+extern struct intel_ring_buffer render_ring;
+extern struct intel_ring_buffer bsd_ring;
+
+#endif /* _INTEL_RINGBUFFER_H_ */
diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index b64a8d7cdf6d..e9168704cabe 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -616,7 +616,9 @@ struct drm_i915_gem_execbuffer2 {
 	__u32 num_cliprects;
 	/** This is a struct drm_clip_rect *cliprects */
 	__u64 cliprects_ptr;
-	__u64 flags; /* currently unused */
+#define I915_EXEC_RENDER                 (1<<0)
+#define I915_EXEC_BSD                    (1<<1)
+	__u64 flags;
 	__u64 rsvd1;
 	__u64 rsvd2;
 };