1 files changed, 50 insertions, 1 deletions

diff --git a/drivers/gpu/drm/drm_agpsupport.c b/drivers/gpu/drm/drm_agpsupport.c
index aefa5ac4c0b..2639be2db9e 100644
--- a/drivers/gpu/drm/drm_agpsupport.c
+++ b/drivers/gpu/drm/drm_agpsupport.c
@@ -33,6 +33,7 @@
 
 #include "drmP.h"
 #include <linux/module.h>
+#include <asm/agp.h>
 
 #if __OS_HAS_AGP
 
@@ -452,4 +453,52 @@ int drm_agp_unbind_memory(DRM_AGP_MEM * handle)
         return agp_unbind_memory(handle);
 }
 
-#endif                          /* __OS_HAS_AGP */
+/**
+ * Binds a collection of pages into AGP memory at the given offset, returning
+ * the AGP memory structure containing them.
+ *
+ * No reference is held on the pages during this time -- it is up to the
+ * caller to handle that.
+ */
+DRM_AGP_MEM *
+drm_agp_bind_pages(struct drm_device *dev,
+                   struct page **pages,
+                   unsigned long num_pages,
+                   uint32_t gtt_offset)
+{
+        DRM_AGP_MEM *mem;
+        int ret, i;
+
+        DRM_DEBUG("\n");
+
+        mem = drm_agp_allocate_memory(dev->agp->bridge, num_pages,
+                                      AGP_USER_MEMORY);
+        if (mem == NULL) {
+                DRM_ERROR("Failed to allocate memory for %ld pages\n",
+                          num_pages);
+                return NULL;
+        }
+
+        for (i = 0; i < num_pages; i++)
+                mem->memory[i] = phys_to_gart(page_to_phys(pages[i]));
+        mem->page_count = num_pages;
+
+        mem->is_flushed = true;
+        ret = drm_agp_bind_memory(mem, gtt_offset / PAGE_SIZE);
+        if (ret != 0) {
+                DRM_ERROR("Failed to bind AGP memory: %d\n", ret);
+                agp_free_memory(mem);
+                return NULL;
+        }
+
+        return mem;
+}
+EXPORT_SYMBOL(drm_agp_bind_pages);
+
+void drm_agp_chipset_flush(struct drm_device *dev)
+{
+        agp_flush_chipset(dev->agp->bridge);
+}
+EXPORT_SYMBOL(drm_agp_chipset_flush);
+
+#endif /* __OS_HAS_AGP */