[Intel-gfx] [Patch 2/5] multiple ring buffer support, convert render ring buffer to use intel_ring_buffer struct

Zou, Nanhai nanhai.zou at intel.com
Wed Apr 7 08:28:27 CEST 2010


Convert ring buffer used by render engine
to use the new Intel_ring_buffer structure.

Signed-off-by: Xiang Haihao <haihao.xiang at intel.com>
Signed-off-by: Zou Nan hai <nanhai.zou at intel.com>

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index bb3a4a8..ea81ec1 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -143,7 +143,7 @@ static int i915_gem_seqno_info(struct seq_file *m, void *data)
        struct drm_device *dev = node->minor->dev;
        drm_i915_private_t *dev_priv = dev->dev_private;

-       if (dev_priv->hw_status_page != NULL) {
+       if (dev_priv->render_ring.status_page.page_addr != NULL) {
                seq_printf(m, "Current sequence: %d\n",
                           i915_get_gem_seqno(dev));
        } else {
@@ -195,7 +195,7 @@ static int i915_interrupt_info(struct seq_file *m, void *data)
        }
        seq_printf(m, "Interrupts received: %d\n",
                   atomic_read(&dev_priv->irq_received));
-       if (dev_priv->hw_status_page != NULL) {
+       if (dev_priv->render_ring.status_page.page_addr != NULL) {
                seq_printf(m, "Current sequence:    %d\n",
                           i915_get_gem_seqno(dev));
        } else {
@@ -251,7 +251,7 @@ static int i915_hws_info(struct seq_file *m, void *data)
        int i;
        volatile u32 *hws;

-       hws = (volatile u32 *)dev_priv->hw_status_page;
+       hws = (volatile u32 *)dev_priv->render_ring.status_page.page_addr;
        if (hws == NULL)
                return 0;

@@ -317,14 +317,14 @@ static int i915_ringbuffer_data(struct seq_file *m, void *data)
        u8 *virt;
        uint32_t *ptr, off;

-       if (!dev_priv->ring.ring_obj) {
+       if (!dev_priv->render_ring.gem_object) {
                seq_printf(m, "No ringbuffer setup\n");
                return 0;
        }

-       virt = dev_priv->ring.virtual_start;
+       virt = dev_priv->render_ring.virtual_start;

-       for (off = 0; off < dev_priv->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->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 a9f8589..c0fce93 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -39,84 +39,6 @@
 #include <linux/pnp.h>
 #include <linux/vga_switcheroo.h>

-/* Really want an OS-independent resettable timer.  Would like to have
- * this loop run for (eg) 3 sec, but have the timer reset every time
- * the head pointer changes, so that EBUSY only happens if the ring
- * actually stalls for (eg) 3 seconds.
- */
-int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
-{
-       drm_i915_private_t *dev_priv = dev->dev_private;
-       drm_i915_ring_buffer_t *ring = &(dev_priv->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;
-
-       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);
-               ring->space = ring->head - (ring->tail + 8);
-               if (ring->space < 0)
-                       ring->space += ring->Size;
-               if (ring->space >= n) {
-                       trace_i915_ring_wait_end (dev);
-                       return 0;
-               }
-
-               if (dev->primary->master) {
-                       struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
-                       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);
-
-       }
-
-       trace_i915_ring_wait_end (dev);
-       return -EBUSY;
-}
-
-/* As a ringbuffer is only allowed to wrap between instructions, fill
- * the tail with NOOPs.
- */
-int i915_wrap_ring(struct drm_device *dev)
-{
-       drm_i915_private_t *dev_priv = dev->dev_private;
-       volatile unsigned int *virt;
-       int rem;
-
-       rem = dev_priv->ring.Size - dev_priv->ring.tail;
-       if (dev_priv->ring.space < rem) {
-               int ret = i915_wait_ring(dev, rem, __func__);
-               if (ret)
-                       return ret;
-       }
-       dev_priv->ring.space -= rem;
-
-       virt = (unsigned int *)
-               (dev_priv->ring.virtual_start + dev_priv->ring.tail);
-       rem /= 4;
-       while (rem--)
-               *virt++ = MI_NOOP;
-
-       dev_priv->ring.tail = 0;
-
-       return 0;
-}
-
 /**
  * Sets up the hardware status page for devices that need a physical address
  * in the register.
@@ -132,14 +54,14 @@ 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) &
-                                            0xf0;
+                       0xf0;

        I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
        DRM_DEBUG_DRIVER("Enabled hardware status page\n");
@@ -171,7 +93,7 @@ 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->ring);
+       struct intel_ring_buffer *ring = &(dev_priv->render_ring);

        /*
         * We should never lose context on the ring with modesetting
@@ -184,7 +106,7 @@ 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;
@@ -204,12 +126,7 @@ static int i915_dma_cleanup(struct drm_device * dev)
        if (dev->irq_enabled)
                drm_irq_uninstall(dev);

-       if (dev_priv->ring.virtual_start) {
-               drm_core_ioremapfree(&dev_priv->ring.map, dev);
-               dev_priv->ring.virtual_start = NULL;
-               dev_priv->ring.map.handle = NULL;
-               dev_priv->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))
@@ -232,24 +149,24 @@ static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
        }

        if (init->ring_size != 0) {
-               if (dev_priv->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->ring.Size = init->ring_size;
+               dev_priv->render_ring.size = init->ring_size;

-               dev_priv->ring.map.offset = init->ring_start;
-               dev_priv->ring.map.size = init->ring_size;
-               dev_priv->ring.map.type = 0;
-               dev_priv->ring.map.flags = 0;
-               dev_priv->ring.map.mtrr = 0;
+               dev_priv->render_ring.map.offset = init->ring_start;
+               dev_priv->render_ring.map.size = init->ring_size;
+               dev_priv->render_ring.map.type = 0;
+               dev_priv->render_ring.map.flags = 0;
+               dev_priv->render_ring.map.mtrr = 0;

-               drm_core_ioremap_wc(&dev_priv->ring.map, dev);
+               drm_core_ioremap_wc(&dev_priv->render_ring.map, dev);

-               if (dev_priv->ring.map.handle == NULL) {
+               if (dev_priv->render_ring.map.handle == NULL) {
                        i915_dma_cleanup(dev);
                        DRM_ERROR("can not ioremap virtual address for"
                                  " ring buffer\n");
@@ -257,7 +174,7 @@ static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
                }
        }

-       dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
+       dev_priv->render_ring.virtual_start = dev_priv->render_ring.map.handle;

        dev_priv->cpp = init->cpp;
        dev_priv->back_offset = init->back_offset;
@@ -277,26 +194,29 @@ 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->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;
@@ -406,9 +326,8 @@ 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->ring.Size - 8)
+       if ((dwords+1) * sizeof(int) >= dev_priv->render_ring.size - 8)
                return -EINVAL;

        BEGIN_LP_RING((dwords+1)&~1);
@@ -441,9 +360,7 @@ 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",
@@ -480,7 +397,6 @@ 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)
@@ -534,10 +450,8 @@ 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");
@@ -586,7 +500,6 @@ 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;
@@ -639,7 +552,7 @@ 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->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,
@@ -881,10 +794,13 @@ 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;

        if (!I915_NEED_GFX_HWS(dev))
                return -EINVAL;

+       ring = &dev_priv->render_ring;
+
        if (!dev_priv) {
                DRM_ERROR("called with no initialization\n");
                return -EINVAL;
@@ -897,7 +813,7 @@ 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;
@@ -913,14 +829,13 @@ 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;
-
-       memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
-       I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
+       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);
        DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
-                               dev_priv->status_gfx_addr);
+                       ring->status_page.gfx_addr);
        DRM_DEBUG_DRIVER("load hws at %p\n",
-                               dev_priv->hw_status_page);
+                       ring->status_page.page_addr);
        return 0;
 }

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 0af3dcc..77cd198 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -359,32 +359,9 @@ int i965_reset(struct drm_device *dev, u8 flags)
         */
        if (drm_core_check_feature(dev, DRIVER_MODESET) ||
            !dev_priv->mm.suspended) {
-               drm_i915_ring_buffer_t *ring = &dev_priv->ring;
-               struct drm_gem_object *obj = ring->ring_obj;
-               struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);
+               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 2af462d..2f8f8bb 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -232,10 +232,10 @@ typedef struct drm_i915_private {
        void __iomem *regs;

        struct pci_dev *bridge_dev;
-       drm_i915_ring_buffer_t ring;
+       struct intel_ring_buffer render_ring;
+

        drm_dma_handle_t *status_page_dmah;
-       void *hw_status_page;
        dma_addr_t dma_status_page;
        uint32_t counter;
        unsigned int status_gfx_addr;
@@ -1002,7 +1002,7 @@ extern void g4x_disable_fbc(struct drm_device *dev);
  * has access to the ring.
  */
 #define RING_LOCK_TEST_WITH_RETURN(dev, file_priv) do {                        \
-       if (((drm_i915_private_t *)dev->dev_private)->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)

@@ -1021,29 +1021,18 @@ extern void g4x_disable_fbc(struct drm_device *dev);
 #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->ring.tail + bytes__ > dev_priv->ring.Size)) \
-               i915_wrap_ring(dev);                                    \
-       if (unlikely (dev_priv->ring.space < bytes__))                  \
-               i915_wait_ring(dev, bytes__, __func__);                 \
-       ring_virt__ = (unsigned int *)                                  \
-               (dev_priv->ring.virtual_start + dev_priv->ring.tail);   \
-       dev_priv->ring.tail += bytes__;                                 \
-       dev_priv->ring.tail &= dev_priv->ring.Size - 1;                 \
-       dev_priv->ring.space -= bytes__;                                \
+       drm_i915_private_t *dev_priv = dev->dev_private;                \
+       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;                \
+       intel_ring_emit(dev, &dev_priv->render_ring, x);        \
 } while (0)

 #define ADVANCE_LP_RING() do {                                         \
-       if (I915_VERBOSE)                                               \
-               DRM_DEBUG("ADVANCE_LP_RING %x\n", dev_priv->ring.tail); \
-       I915_WRITE(PRB0_TAIL, dev_priv->ring.tail);                     \
+       drm_i915_private_t *dev_priv = dev->dev_private;                \
+       intel_ring_advance(dev, &dev_priv->render_ring);        \
 } while(0)

 /**
@@ -1061,7 +1050,7 @@ extern void g4x_disable_fbc(struct drm_device *dev);
  *
  * 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
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index b85727c..db280c6 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1604,7 +1604,6 @@ i915_add_request(struct drm_device *dev, struct drm_file *file_priv,
        struct drm_i915_gem_request *request;
        uint32_t seqno;
        int was_empty;
-       RING_LOCALS;

        if (file_priv != NULL)
                i915_file_priv = file_priv->driver_priv;
@@ -1665,10 +1664,8 @@ 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))
@@ -1763,7 +1760,7 @@ 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))
+       if (!dev_priv->render_ring.status_page.page_addr || list_empty(&dev_priv->mm.request_list))
                return;

        seqno = i915_get_gem_seqno(dev);
@@ -1890,7 +1887,6 @@ i915_gem_flush(struct drm_device *dev,
 {
        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__,
@@ -3497,7 +3493,6 @@ i915_dispatch_gem_execbuffer(struct drm_device *dev,
        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;
@@ -4507,7 +4502,7 @@ i915_gem_idle(struct drm_device *dev)

        mutex_lock(&dev->struct_mutex);

-       if (dev_priv->mm.suspended || dev_priv->ring.ring_obj == NULL) {
+       if (dev_priv->mm.suspended || dev_priv->render_ring.gem_object == NULL) {
                mutex_unlock(&dev->struct_mutex);
                return 0;
        }
@@ -4545,213 +4540,26 @@ i915_gem_idle(struct drm_device *dev)
        return 0;
 }

-static int
-i915_gem_init_hws(struct drm_device *dev)
-{
-       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 = drm_gem_object_alloc(dev, 4096);
-       if (obj == NULL) {
-               DRM_ERROR("Failed to allocate status page\n");
-               return -ENOMEM;
-       }
-       obj_priv = to_intel_bo(obj);
-       obj_priv->agp_type = AGP_USER_CACHED_MEMORY;
-
-       ret = i915_gem_object_pin(obj, 4096);
-       if (ret != 0) {
-               drm_gem_object_unreference(obj);
-               return ret;
-       }
-
-       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");
-               memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
-               i915_gem_object_unpin(obj);
-               drm_gem_object_unreference(obj);
-               return -EINVAL;
-       }
-       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);
-
-       return 0;
-}
-
-static void
-i915_gem_cleanup_hws(struct drm_device *dev)
-{
-       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)
-               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;
-
-       memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
-       dev_priv->hw_status_page = NULL;
-
-       /* Write high address into HWS_PGA when disabling. */
-       I915_WRITE(HWS_PGA, 0x1ffff000);
-}
-
 int
 i915_gem_init_ringbuffer(struct drm_device *dev)
 {
        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->ring;
        int ret;
-       u32 head;
-
-       ret = i915_gem_init_hws(dev);
-       if (ret != 0)
-               return ret;
-
-       obj = drm_gem_object_alloc(dev, 128 * 1024);
-       if (obj == NULL) {
-               DRM_ERROR("Failed to allocate ringbuffer\n");
-               i915_gem_cleanup_hws(dev);
-               return -ENOMEM;
-       }
-       obj_priv = to_intel_bo(obj);
-
-       ret = i915_gem_object_pin(obj, 4096);
-       if (ret != 0) {
-               drm_gem_object_unreference(obj);
-               i915_gem_cleanup_hws(dev);
-               return ret;
-       }
-
-       /* Set up the kernel mapping for the ring. */
-       ring->Size = obj->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;

-       drm_core_ioremap_wc(&ring->map, dev);
-       if (ring->map.handle == NULL) {
-               DRM_ERROR("Failed to map ringbuffer.\n");
-               memset(&dev_priv->ring, 0, sizeof(dev_priv->ring));
-               i915_gem_object_unpin(obj);
-               drm_gem_object_unreference(obj);
-               i915_gem_cleanup_hws(dev);
-               return -EINVAL;
-       }
-       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));
-       }
-
-       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->space = ring->head - (ring->tail + 8);
-               if (ring->space < 0)
-                       ring->space += ring->Size;
+       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 (IS_I9XX(dev) && !IS_GEN3(dev)) {
-               I915_WRITE(MI_MODE,
-                          (VS_TIMER_DISPATCH) << 16 | VS_TIMER_DISPATCH);
-       }
-
-       return 0;
+       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;
-
-       if (dev_priv->ring.ring_obj == NULL)
-               return;
-
-       drm_core_ioremapfree(&dev_priv->ring.map, dev);
-
-       i915_gem_object_unpin(dev_priv->ring.ring_obj);
-       drm_gem_object_unreference(dev_priv->ring.ring_obj);
-       dev_priv->ring.ring_obj = NULL;
-       memset(&dev_priv->ring, 0, sizeof(dev_priv->ring));
-
-       i915_gem_cleanup_hws(dev);
+       intel_cleanup_ring_buffer(dev, &dev_priv->render_ring);
 }

 int
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index f1a8868..566b060 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -527,17 +527,17 @@ i915_ringbuffer_last_batch(struct drm_device *dev)
         */
        bbaddr = 0;
        head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
-       ring = (u32 *)(dev_priv->ring.virtual_start + head);
+       ring = (u32 *)(dev_priv->render_ring.virtual_start + head);

-       while (--ring >= (u32 *)dev_priv->ring.virtual_start) {
+       while (--ring >= (u32 *)dev_priv->render_ring.virtual_start) {
                bbaddr = i915_get_bbaddr(dev, ring);
                if (bbaddr)
                        break;
        }

        if (bbaddr == 0) {
-               ring = (u32 *)(dev_priv->ring.virtual_start + dev_priv->ring.Size);
-               while (--ring >= (u32 *)dev_priv->ring.virtual_start) {
+               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)
                                break;
@@ -547,6 +547,7 @@ i915_ringbuffer_last_batch(struct drm_device *dev)
        return bbaddr;
 }

+
 /**
  * i915_capture_error_state - capture an error record for later analysis
  * @dev: drm device
@@ -630,7 +631,7 @@ 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->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;
@@ -974,7 +975,6 @@ 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);

@@ -1077,7 +1077,7 @@ int i915_irq_emit(struct drm_device *dev, void *data,
        drm_i915_irq_emit_t *emit = data;
        int result;

-       if (!dev_priv || !dev_priv->ring.virtual_start) {
+       if (!dev_priv || !dev_priv->render_ring.virtual_start) {
                DRM_ERROR("called with no initialization\n");
                return -EINVAL;
        }
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index eb4a265..678a7e1 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4224,7 +4224,6 @@ 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 6d524a1..2e490ad 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -211,10 +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);

        overlay->active = 1;
@@ -248,7 +245,6 @@ 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 +270,6 @@ 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 +309,7 @@ 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 +383,9 @@ 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 e0495b4..89415e1 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -168,6 +168,7 @@ static int init_render_ring(struct drm_device *dev,
                                I915_READ(PRB0_START));
        }

+
        I915_WRITE(PRB0_CTL,
                        ((ring->gem_object->size - PAGE_SIZE) & RING_NR_PAGES)
                        | RING_NO_REPORT | RING_VALID);
@@ -185,6 +186,15 @@ static int init_render_ring(struct drm_device *dev,
                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;
 }

@@ -418,11 +428,6 @@ int intel_init_ring_buffer(struct drm_device *dev,
                return ret;
        }

-       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;
        spin_lock_init(&ring->user_irq_lock);
        INIT_LIST_HEAD(&ring->active_list);
        INIT_LIST_HEAD(&ring->request_list);
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