ttm: fix agp since ttm tt rework

ttm tt rework modified the way we allocate and populate the
ttm_tt structure, the AGP side was missing some bit to properly
work. Fix those and fix radeon and nouveau AGP support.

Tested on radeon only so far.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -1066,6 +1066,12 @@ nouveau_ttm_tt_populate(struct ttm_tt *ttm)
 	dev_priv = nouveau_bdev(ttm->bdev);
 	dev = dev_priv->dev;
 
+#if __OS_HAS_AGP
+	if (dev_priv->gart_info.type == NOUVEAU_GART_AGP) {
+		return ttm_agp_tt_populate(ttm);
+	}
+#endif
+
 #ifdef CONFIG_SWIOTLB
 	if (swiotlb_nr_tbl()) {
 		return ttm_dma_populate((void *)ttm, dev->dev);
@@ -1105,6 +1111,13 @@ nouveau_ttm_tt_unpopulate(struct ttm_tt *ttm)
 	dev_priv = nouveau_bdev(ttm->bdev);
 	dev = dev_priv->dev;
 
+#if __OS_HAS_AGP
+	if (dev_priv->gart_info.type == NOUVEAU_GART_AGP) {
+		ttm_agp_tt_unpopulate(ttm);
+		return;
+	}
+#endif
+
 #ifdef CONFIG_SWIOTLB
 	if (swiotlb_nr_tbl()) {
 		ttm_dma_unpopulate((void *)ttm, dev->dev);

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -618,6 +618,11 @@ static int radeon_ttm_tt_populate(struct ttm_tt *ttm)
 		return 0;
 
 	rdev = radeon_get_rdev(ttm->bdev);
+#if __OS_HAS_AGP
+	if (rdev->flags & RADEON_IS_AGP) {
+		return ttm_agp_tt_populate(ttm);
+	}
+#endif
 
 #ifdef CONFIG_SWIOTLB
 	if (swiotlb_nr_tbl()) {
@@ -654,6 +659,12 @@ static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm)
 	unsigned i;
 
 	rdev = radeon_get_rdev(ttm->bdev);
+#if __OS_HAS_AGP
+	if (rdev->flags & RADEON_IS_AGP) {
+		ttm_agp_tt_unpopulate(ttm);
+		return;
+	}
+#endif
 
 #ifdef CONFIG_SWIOTLB
 	if (swiotlb_nr_tbl()) {

drivers/gpu/drm/ttm/ttm_agp_backend.c

@@ -31,6 +31,7 @@
 
 #include "ttm/ttm_module.h"
 #include "ttm/ttm_bo_driver.h"
+#include "ttm/ttm_page_alloc.h"
 #ifdef TTM_HAS_AGP
 #include "ttm/ttm_placement.h"
 #include <linux/agp_backend.h>
@@ -97,6 +98,7 @@ static void ttm_agp_destroy(struct ttm_tt *ttm)
 
 	if (agp_be->mem)
 		ttm_agp_unbind(ttm);
+	ttm_tt_fini(ttm);
 	kfree(agp_be);
 }
 
@@ -129,4 +131,19 @@ struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
 }
 EXPORT_SYMBOL(ttm_agp_tt_create);
 
+int ttm_agp_tt_populate(struct ttm_tt *ttm)
+{
+	if (ttm->state != tt_unpopulated)
+		return 0;
+
+	return ttm_pool_populate(ttm);
+}
+EXPORT_SYMBOL(ttm_agp_tt_populate);
+
+void ttm_agp_tt_unpopulate(struct ttm_tt *ttm)
+{
+	ttm_pool_unpopulate(ttm);
+}
+EXPORT_SYMBOL(ttm_agp_tt_unpopulate);
+
 #endif

drivers/gpu/drm/ttm/ttm_tt.c

@@ -191,6 +191,7 @@ int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
 	ttm->page_flags = page_flags;
 	ttm->dummy_read_page = dummy_read_page;
 	ttm->state = tt_unpopulated;
+	ttm->swap_storage = NULL;
 
 	ttm_tt_alloc_page_directory(ttm);
 	if (!ttm->pages) {
@@ -222,6 +223,7 @@ int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev,
 	ttm->page_flags = page_flags;
 	ttm->dummy_read_page = dummy_read_page;
 	ttm->state = tt_unpopulated;
+	ttm->swap_storage = NULL;
 
 	INIT_LIST_HEAD(&ttm_dma->pages_list);
 	ttm_dma_tt_alloc_page_directory(ttm_dma);

include/drm/ttm/ttm_bo_driver.h

@@ -1030,6 +1030,8 @@ extern struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
 					struct agp_bridge_data *bridge,
 					unsigned long size, uint32_t page_flags,
 					struct page *dummy_read_page);
+int ttm_agp_tt_populate(struct ttm_tt *ttm);
+void ttm_agp_tt_unpopulate(struct ttm_tt *ttm);
 #endif
 
 #endif