Revert "ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set."

This reverts commit 69a07f0b117a40fcc1a479358d8e1f41793617f2.

We've tracked a number of problems back to this, and Thomas
thinks we should redesign this for .40/41 anyways so I'm
happy to revert it.

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 737a2a2..9d9d929 100644 (file)
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -683,22 +683,14 @@ int ttm_get_pages(struct list_head *pages, int flags,
                        gfp_flags |= GFP_HIGHUSER;
 
                for (r = 0; r < count; ++r) {
-                       if ((flags & TTM_PAGE_FLAG_DMA32) && dma_address) {
-                               void *addr;
-                               addr = dma_alloc_coherent(NULL, PAGE_SIZE,
-                                                         &dma_address[r],
-                                                         gfp_flags);
-                               if (addr == NULL)
-                                       return -ENOMEM;
-                               p = virt_to_page(addr);
-                       } else
-                               p = alloc_page(gfp_flags);
+                       p = alloc_page(gfp_flags);
                        if (!p) {
 
                                printk(KERN_ERR TTM_PFX
                                       "Unable to allocate page.");
                                return -ENOMEM;
                        }
+
                        list_add(&p->lru, pages);
                }
                return 0;
@@ -746,24 +738,12 @@ void ttm_put_pages(struct list_head *pages, unsigned page_count, int flags,
        unsigned long irq_flags;
        struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
        struct page *p, *tmp;
-       unsigned r;
 
        if (pool == NULL) {
                /* No pool for this memory type so free the pages */
 
-               r = page_count-1;
                list_for_each_entry_safe(p, tmp, pages, lru) {
-                       if ((flags & TTM_PAGE_FLAG_DMA32) && dma_address) {
-                               void *addr = page_address(p);
-                               WARN_ON(!addr || !dma_address[r]);
-                               if (addr)
-                                       dma_free_coherent(NULL, PAGE_SIZE,
-                                                         addr,
-                                                         dma_address[r]);
-                               dma_address[r] = 0;
-                       } else
-                               __free_page(p);
-                       r--;
+                       __free_page(p);
                }
                /* Make the pages list empty */
                INIT_LIST_HEAD(pages);