From fd4f8b6013dd05fc6babde3aa4265e90ca8c89c2 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Tue, 23 Sep 2008 14:50:57 -0700 Subject: [PATCH] drm: Use ioremap_wc in i915_driver instead of ioremap, since we always want WC. Fixes failure to map the ringbuffer when PAT tells us we don't get to do uncached on something that's already mapped WC, or something along those lines. Signed-off-by: Eric Anholt Signed-off-by: Dave Airlie --- drivers/gpu/drm/i915/i915_gem.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 29d9d21e9413f..6ecfd108effaf 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -233,7 +233,7 @@ i915_gem_gtt_pwrite(struct drm_device *dev, struct drm_gem_object *obj, if (unwritten) #endif /* CONFIG_HIGHMEM */ { - vaddr = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE); + vaddr = ioremap_wc(pfn << PAGE_SHIFT, PAGE_SIZE); #if WATCH_PWRITE DRM_INFO("pwrite slow i %d o %d l %d " "pfn %ld vaddr %p\n", @@ -1612,9 +1612,10 @@ i915_gem_object_pin_and_relocate(struct drm_gem_object *obj, if (reloc_page != NULL) iounmap(reloc_page); - reloc_page = ioremap(dev->agp->base + - (reloc_offset & ~(PAGE_SIZE - 1)), - PAGE_SIZE); + reloc_page = ioremap_wc(dev->agp->base + + (reloc_offset & + ~(PAGE_SIZE - 1)), + PAGE_SIZE); last_reloc_offset = reloc_offset; if (reloc_page == NULL) { drm_gem_object_unreference(target_obj); @@ -2318,7 +2319,9 @@ i915_gem_init_hws(struct drm_device *dev) dev_priv->hws_map.flags = 0; dev_priv->hws_map.mtrr = 0; - drm_core_ioremap(&dev_priv->hws_map, dev); + /* 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) { DRM_ERROR("Failed to map status page.\n"); memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map)); @@ -2369,7 +2372,7 @@ i915_gem_init_ringbuffer(struct drm_device *dev) dev_priv->ring.map.flags = 0; dev_priv->ring.map.mtrr = 0; - drm_core_ioremap(&dev_priv->ring.map, dev); + drm_core_ioremap_wc(&dev_priv->ring.map, dev); if (dev_priv->ring.map.handle == NULL) { DRM_ERROR("Failed to map ringbuffer.\n"); memset(&dev_priv->ring, 0, sizeof(dev_priv->ring)); -- 2.39.5