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authorKeith Packard <keithp@keithp.com>2008-10-14 19:55:10 -0700
committerDave Airlie <airlied@linux.ie>2008-10-18 07:10:53 +1000
commitba1eb1d825fdef40f69871caf8e5842d00efbbc5 (patch)
tree73b45769022788532ee169c270e2792a229b1a40 /drivers/gpu
parent50aa253d820ad4577e2231202f2c8fd89f9dc4e6 (diff)
i915: Map status page cached for chips with GTT-based HWS location.
This should improve performance by avoiding uncached reads by the CPU (the point of having a status page), and may improve stability. This patch only affects G33, GM45 and G45 chips as those are the only ones using GTT-based HWS mappings. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/drm_agpsupport.c5
-rw-r--r--drivers/gpu/drm/i915/i915_drv.h3
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c28
3 files changed, 21 insertions, 15 deletions
diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c
index 2639be2db9e..3d33b8252b5 100644
--- a/drivers/gpu/drm/drm_agpsupport.c
+++ b/drivers/gpu/drm/drm_agpsupport.c
@@ -464,7 +464,8 @@ DRM_AGP_MEM *
drm_agp_bind_pages(struct drm_device *dev,
struct page **pages,
unsigned long num_pages,
- uint32_t gtt_offset)
+ uint32_t gtt_offset,
+ u32 type)
{
DRM_AGP_MEM *mem;
int ret, i;
@@ -472,7 +473,7 @@ drm_agp_bind_pages(struct drm_device *dev,
DRM_DEBUG("\n");
mem = drm_agp_allocate_memory(dev->agp->bridge, num_pages,
- AGP_USER_MEMORY);
+ type);
if (mem == NULL) {
DRM_ERROR("Failed to allocate memory for %ld pages\n",
num_pages);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index da7c0072ad4..eae4ed3956e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -373,6 +373,9 @@ struct drm_i915_gem_object {
/** Current tiling mode for the object. */
uint32_t tiling_mode;
+ /** AGP mapping type (AGP_USER_MEMORY or AGP_USER_CACHED_MEMORY */
+ uint32_t agp_type;
+
/**
* Flagging of which individual pages are valid in GEM_DOMAIN_CPU when
* GEM_DOMAIN_CPU is not in the object's read domain.
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 94b9bdce0c7..99a86249bb1 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1159,7 +1159,8 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment)
obj_priv->agp_mem = drm_agp_bind_pages(dev,
obj_priv->page_list,
page_count,
- obj_priv->gtt_offset);
+ obj_priv->gtt_offset,
+ obj_priv->agp_type);
if (obj_priv->agp_mem == NULL) {
i915_gem_object_free_page_list(obj);
drm_mm_put_block(obj_priv->gtt_space);
@@ -2142,6 +2143,8 @@ int i915_gem_init_object(struct drm_gem_object *obj)
obj->write_domain = I915_GEM_DOMAIN_CPU;
obj->read_domains = I915_GEM_DOMAIN_CPU;
+ obj_priv->agp_type = AGP_USER_MEMORY;
+
obj->driver_private = obj_priv;
obj_priv->obj = obj;
INIT_LIST_HEAD(&obj_priv->list);
@@ -2311,6 +2314,7 @@ i915_gem_init_hws(struct drm_device *dev)
return -ENOMEM;
}
obj_priv = obj->driver_private;
+ obj_priv->agp_type = AGP_USER_CACHED_MEMORY;
ret = i915_gem_object_pin(obj, 4096);
if (ret != 0) {
@@ -2319,25 +2323,18 @@ i915_gem_init_hws(struct drm_device *dev)
}
dev_priv->status_gfx_addr = obj_priv->gtt_offset;
- dev_priv->hws_map.offset = dev->agp->base + obj_priv->gtt_offset;
- dev_priv->hws_map.size = 4096;
- dev_priv->hws_map.type = 0;
- dev_priv->hws_map.flags = 0;
- dev_priv->hws_map.mtrr = 0;
- /* Ioremapping here is the wrong thing to do. We want cached access.
- */
- drm_core_ioremap_wc(&dev_priv->hws_map, dev);
- if (dev_priv->hws_map.handle == NULL) {
+ dev_priv->hw_status_page = kmap(obj_priv->page_list[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));
drm_gem_object_unreference(obj);
return -EINVAL;
}
dev_priv->hws_obj = obj;
- 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);
+ I915_READ(HWS_PGA); /* posting read */
DRM_DEBUG("hws offset: 0x%08x\n", dev_priv->status_gfx_addr);
return 0;
@@ -2456,10 +2453,15 @@ i915_gem_cleanup_ringbuffer(struct drm_device *dev)
memset(&dev_priv->ring, 0, sizeof(dev_priv->ring));
if (dev_priv->hws_obj != NULL) {
- i915_gem_object_unpin(dev_priv->hws_obj);
- drm_gem_object_unreference(dev_priv->hws_obj);
+ struct drm_gem_object *obj = dev_priv->hws_obj;
+ struct drm_i915_gem_object *obj_priv = obj->driver_private;
+
+ kunmap(obj_priv->page_list[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);