Merge branch 'stable/ttm.pci-api.v5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into drm-next

* 'stable/ttm.pci-api.v5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  ttm: Include the 'struct dev' when using the DMA API.
  nouveau/ttm/PCIe: Use dma_addr if TTM has set it.
  radeon/ttm/PCIe: Use dma_addr if TTM has set it.
  ttm: Expand (*populate) to support an array of DMA addresses.
  ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set.
  ttm: Introduce a placeholder for DMA (bus) addresses.

2 files changed, 16 insertions, 3 deletions

diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 1da8af6ac884..38ff06822609 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -50,13 +50,15 @@ struct ttm_backend_func {
          * @pages: Array of pointers to ttm pages.
          * @dummy_read_page: Page to be used instead of NULL pages in the
          * array @pages.
+         * @dma_addrs: Array of DMA (bus) address of the ttm pages.
          *
          * Populate the backend with ttm pages. Depending on the backend,
          * it may or may not copy the @pages array.
          */
         int (*populate) (struct ttm_backend *backend,
                          unsigned long num_pages, struct page **pages,
-                         struct page *dummy_read_page);
+                         struct page *dummy_read_page,
+                         dma_addr_t *dma_addrs);
         /**
          * struct ttm_backend_func member clear
          *
@@ -149,6 +151,7 @@ enum ttm_caching_state {
  * @swap_storage: Pointer to shmem struct file for swap storage.
  * @caching_state: The current caching state of the pages.
  * @state: The current binding state of the pages.
+ * @dma_address: The DMA (bus) addresses of the pages (if TTM_PAGE_FLAG_DMA32)
  *
  * This is a structure holding the pages, caching- and aperture binding
  * status for a buffer object that isn't backed by fixed (VRAM / AGP)
@@ -173,6 +176,7 @@ struct ttm_tt {
                 tt_unbound,
                 tt_unpopulated,
         } state;
+        dma_addr_t *dma_address;
 };
 
 #define TTM_MEMTYPE_FLAG_FIXED         (1 << 0) /* Fixed (on-card) PCI memory */
@@ -547,6 +551,7 @@ struct ttm_bo_device {
         struct list_head device_list;
         struct ttm_bo_global *glob;
         struct ttm_bo_driver *driver;
+        struct device *dev;
         rwlock_t vm_lock;
         struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
         spinlock_t fence_lock;
diff --git a/include/drm/ttm/ttm_page_alloc.h b/include/drm/ttm/ttm_page_alloc.h
index 116821448c38..ccb6b7a240e2 100644
--- a/include/drm/ttm/ttm_page_alloc.h
+++ b/include/drm/ttm/ttm_page_alloc.h
@@ -36,11 +36,15 @@
  * @flags: ttm flags for page allocation.
  * @cstate: ttm caching state for the page.
  * @count: number of pages to allocate.
+ * @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
+ * @dev: struct device for appropiate DMA accounting.
  */
 int ttm_get_pages(struct list_head *pages,
                   int flags,
                   enum ttm_caching_state cstate,
-                  unsigned count);
+                  unsigned count,
+                  dma_addr_t *dma_address,
+                  struct device *dev);
 /**
  * Put linked list of pages to pool.
  *
@@ -49,11 +53,15 @@ int ttm_get_pages(struct list_head *pages,
  * count.
  * @flags: ttm flags for page allocation.
  * @cstate: ttm caching state.
+ * @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
+ * @dev: struct device for appropiate DMA accounting.
  */
 void ttm_put_pages(struct list_head *pages,
                    unsigned page_count,
                    int flags,
-                   enum ttm_caching_state cstate);
+                   enum ttm_caching_state cstate,
+                   dma_addr_t *dma_address,
+                   struct device *dev);
 /**
  * Initialize pool allocator.
  */