From 5032d871f7d300aee10c309ea004eb4f851553fe Mon Sep 17 00:00:00 2001 From: Rafael Barbalho Date: Wed, 21 Aug 2013 17:10:51 +0100 Subject: [PATCH] drm/i915: Cleaning up the relocate entry function As the relocate entry function was getting a bit too big I've moved the code that used to use either the cpu or the gtt to for the relocation into two separate functions. Signed-off-by: Rafael Barbalho Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_execbuffer.c | 88 +++++++++++++--------- 1 file changed, 54 insertions(+), 34 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 7dcf78cf6781..792c52a235ee 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -171,6 +171,56 @@ static inline int use_cpu_reloc(struct drm_i915_gem_object *obj) obj->cache_level != I915_CACHE_NONE); } +static int +relocate_entry_cpu(struct drm_i915_gem_object *obj, + struct drm_i915_gem_relocation_entry *reloc) +{ + uint32_t page_offset = offset_in_page(reloc->offset); + char *vaddr; + int ret = -EINVAL; + + ret = i915_gem_object_set_to_cpu_domain(obj, 1); + if (ret) + return ret; + + vaddr = kmap_atomic(i915_gem_object_get_page(obj, + reloc->offset >> PAGE_SHIFT)); + *(uint32_t *)(vaddr + page_offset) = reloc->delta; + kunmap_atomic(vaddr); + + return 0; +} + +static int +relocate_entry_gtt(struct drm_i915_gem_object *obj, + struct drm_i915_gem_relocation_entry *reloc) +{ + struct drm_device *dev = obj->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + uint32_t __iomem *reloc_entry; + void __iomem *reloc_page; + int ret = -EINVAL; + + ret = i915_gem_object_set_to_gtt_domain(obj, true); + if (ret) + return ret; + + ret = i915_gem_object_put_fence(obj); + if (ret) + return ret; + + /* Map the page containing the relocation we're going to perform. */ + reloc->offset += i915_gem_obj_ggtt_offset(obj); + reloc_page = io_mapping_map_atomic_wc(dev_priv->gtt.mappable, + reloc->offset & PAGE_MASK); + reloc_entry = (uint32_t __iomem *) + (reloc_page + offset_in_page(reloc->offset)); + iowrite32(reloc->delta, reloc_entry); + io_mapping_unmap_atomic(reloc_page); + + return 0; +} + static int i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj, struct eb_objects *eb, @@ -255,40 +305,10 @@ i915_gem_execbuffer_relocate_entry(struct drm_i915_gem_object *obj, return -EFAULT; reloc->delta += target_offset; - if (use_cpu_reloc(obj)) { - uint32_t page_offset = offset_in_page(reloc->offset); - char *vaddr; - - ret = i915_gem_object_set_to_cpu_domain(obj, 1); - if (ret) - return ret; - - vaddr = kmap_atomic(i915_gem_object_get_page(obj, - reloc->offset >> PAGE_SHIFT)); - *(uint32_t *)(vaddr + page_offset) = reloc->delta; - kunmap_atomic(vaddr); - } else { - struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t __iomem *reloc_entry; - void __iomem *reloc_page; - - ret = i915_gem_object_set_to_gtt_domain(obj, true); - if (ret) - return ret; - - ret = i915_gem_object_put_fence(obj); - if (ret) - return ret; - - /* Map the page containing the relocation we're going to perform. */ - reloc->offset += i915_gem_obj_ggtt_offset(obj); - reloc_page = io_mapping_map_atomic_wc(dev_priv->gtt.mappable, - reloc->offset & PAGE_MASK); - reloc_entry = (uint32_t __iomem *) - (reloc_page + offset_in_page(reloc->offset)); - iowrite32(reloc->delta, reloc_entry); - io_mapping_unmap_atomic(reloc_page); - } + if (use_cpu_reloc(obj)) + ret = relocate_entry_cpu(obj, reloc); + else + ret = relocate_entry_gtt(obj, reloc); /* and update the user's relocation entry */ reloc->presumed_offset = target_offset;