From bd88ee4c1b1c8fc8b78a0ba7b6235d230cea0d05 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 29d9d21e9413..6ecfd108effa 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));