Merge branch 'devel/ttm.dma_pool.v2.5' into testing

* devel/ttm.dma_pool.v2.5:
  ttm:dma: Add 'ttm_dma' module to radeon and nouveau to force enable the TTM DMA
  drm/nouveau: enable the TTM DMA pool on 32-bit DMA only device V2
  drm/radeon/kms: Enable the TTM DMA pool if swiotlb is on V2
  swiotlb: Expose swiotlb_nr_tlb function to modules
  ttm: Provide DMA aware TTM page pool code. V5
  drm/ttm: introduce callback for ttm_tt populate & unpopulate V2
  drm/ttm: merge ttm_backend and ttm_tt V2
  drm/ttm: test for dma_address array allocation failure
  drm/ttm: convert page allocation to use page ptr array instead of list V4
  drm/ttm: overhaul memory accounting
  drm/ttm: use ttm put pages function to properly restore cache attribute
  drm/ttm: remove unused backend flags field
  drm/ttm: remove split btw highmen and lowmem page
  drm/ttm: remove userspace backed ttm object support

Conflicts:
	drivers/gpu/drm/radeon/radeon_drv.c
	drivers/gpu/drm/radeon/radeon_gart.c

31 files changed, 2081 insertions, 1276 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 7226f419e178b..0c9c5db3ef8c2 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -28,6 +28,7 @@
  */
 
 #include "drmP.h"
+#include "ttm/ttm_page_alloc.h"
 
 #include "nouveau_drm.h"
 #include "nouveau_drv.h"
@@ -343,8 +344,10 @@ nouveau_bo_wr32(struct nouveau_bo *nvbo, unsigned index, u32 val)
 		*mem = val;
 }
 
-static struct ttm_backend *
-nouveau_bo_create_ttm_backend_entry(struct ttm_bo_device *bdev)
+static struct ttm_tt *
+nouveau_ttm_tt_create(struct ttm_bo_device *bdev,
+		      unsigned long size, uint32_t page_flags,
+		      struct page *dummy_read_page)
 {
 	struct drm_nouveau_private *dev_priv = nouveau_bdev(bdev);
 	struct drm_device *dev = dev_priv->dev;
@@ -352,11 +355,13 @@ nouveau_bo_create_ttm_backend_entry(struct ttm_bo_device *bdev)
 	switch (dev_priv->gart_info.type) {
 #if __OS_HAS_AGP
 	case NOUVEAU_GART_AGP:
-		return ttm_agp_backend_init(bdev, dev->agp->bridge);
+		return ttm_agp_tt_create(bdev, dev->agp->bridge,
+					 size, page_flags, dummy_read_page);
 #endif
 	case NOUVEAU_GART_PDMA:
 	case NOUVEAU_GART_HW:
-		return nouveau_sgdma_init_ttm(dev);
+		return nouveau_sgdma_create_ttm(bdev, size, page_flags,
+						dummy_read_page);
 	default:
 		NV_ERROR(dev, "Unknown GART type %d\n",
 			 dev_priv->gart_info.type);
@@ -1044,8 +1049,79 @@ nouveau_bo_fence(struct nouveau_bo *nvbo, struct nouveau_fence *fence)
 	nouveau_fence_unref(&old_fence);
 }
 
+static int
+nouveau_ttm_tt_populate(struct ttm_tt *ttm)
+{
+	struct drm_nouveau_private *dev_priv;
+	struct drm_device *dev;
+	unsigned i;
+	int r;
+
+	if (ttm->state != tt_unpopulated)
+		return 0;
+
+	dev_priv = nouveau_bdev(ttm->bdev);
+	dev = dev_priv->dev;
+
+#ifdef CONFIG_SWIOTLB
+	if (((dma_get_mask(dev->dev) <= DMA_BIT_MASK(32)) && swiotlb_nr_tbl()) || nouveau_ttm_dma) {
+		return ttm_dma_populate(ttm, dev->dev);
+	}
+#endif
+
+	r = ttm_page_alloc_ttm_tt_populate(ttm);
+	if (r) {
+		return r;
+	}
+
+	for (i = 0; i < ttm->num_pages; i++) {
+		ttm->dma_address[i] = pci_map_page(dev->pdev, ttm->pages[i],
+						   0, PAGE_SIZE,
+						   PCI_DMA_BIDIRECTIONAL);
+		if (pci_dma_mapping_error(dev->pdev, ttm->dma_address[i])) {
+			while (--i) {
+				pci_unmap_page(dev->pdev, ttm->dma_address[i],
+					       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+				ttm->dma_address[i] = 0;
+			}
+			ttm_page_alloc_ttm_tt_unpopulate(ttm);
+			return -EFAULT;
+		}
+	}
+	return 0;
+}
+
+static void
+nouveau_ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+	struct drm_nouveau_private *dev_priv;
+	struct drm_device *dev;
+	unsigned i;
+
+	dev_priv = nouveau_bdev(ttm->bdev);
+	dev = dev_priv->dev;
+
+#ifdef CONFIG_SWIOTLB
+	if (((dma_get_mask(dev->dev) <= DMA_BIT_MASK(32)) && swiotlb_nr_tbl()) || nouveau_ttm_dma) {
+		ttm_dma_unpopulate(ttm, dev->dev);
+		return;
+	}
+#endif
+
+	for (i = 0; i < ttm->num_pages; i++) {
+		if (ttm->dma_address[i]) {
+			pci_unmap_page(dev->pdev, ttm->dma_address[i],
+				       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+		}
+	}
+
+	ttm_page_alloc_ttm_tt_unpopulate(ttm);
+}
+
 struct ttm_bo_driver nouveau_bo_driver = {
-	.create_ttm_backend_entry = nouveau_bo_create_ttm_backend_entry,
+	.ttm_tt_create = &nouveau_ttm_tt_create,
+	.ttm_tt_populate = &nouveau_ttm_tt_populate,
+	.ttm_tt_unpopulate = &nouveau_ttm_tt_unpopulate,
 	.invalidate_caches = nouveau_bo_invalidate_caches,
 	.init_mem_type = nouveau_bo_init_mem_type,
 	.evict_flags = nouveau_bo_evict_flags,
diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
index 8e1592368cce1..f52c2db3529ef 100644
--- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c
+++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
@@ -178,6 +178,7 @@ static struct drm_info_list nouveau_debugfs_list[] = {
 	{ "memory", nouveau_debugfs_memory_info, 0, NULL },
 	{ "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
 	{ "ttm_page_pool", ttm_page_alloc_debugfs, 0, NULL },
+	{ "ttm_dma_page_pool", ttm_dma_page_alloc_debugfs, 0, NULL },
 };
 #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.c b/drivers/gpu/drm/nouveau/nouveau_drv.c
index 9f7bb12952623..6325908fe9902 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.c
@@ -37,6 +37,10 @@
 
 #include "drm_pciids.h"
 
+MODULE_PARM_DESC(ttm_dma, "Enable TTM DMA mode irregardless if DMA32 is set");
+int nouveau_ttm_dma;
+module_param_named(ttm_dma, nouveau_ttm_dma, int, 0444);
+
 MODULE_PARM_DESC(agpmode, "AGP mode (0 to disable AGP)");
 int nouveau_agpmode = -1;
 module_param_named(agpmode, nouveau_agpmode, int, 0400);
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
index 29837da1098b3..cfdcd5de11106 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -829,6 +829,7 @@ nouveau_bo_ref(struct nouveau_bo *ref, struct nouveau_bo **pnvbo)
 }
 
 /* nouveau_drv.c */
+extern int nouveau_ttm_dma;
 extern int nouveau_modeset;
 extern int nouveau_agpmode;
 extern int nouveau_duallink;
@@ -1000,7 +1001,10 @@ extern int nouveau_sgdma_init(struct drm_device *);
 extern void nouveau_sgdma_takedown(struct drm_device *);
 extern uint32_t nouveau_sgdma_get_physical(struct drm_device *,
 					   uint32_t offset);
-extern struct ttm_backend *nouveau_sgdma_init_ttm(struct drm_device *);
+extern struct ttm_tt *nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
+					       unsigned long size,
+					       uint32_t page_flags,
+					       struct page *dummy_read_page);
 
 /* nouveau_debugfs.c */
 #if defined(CONFIG_DRM_NOUVEAU_DEBUG)
diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 36bec4807701b..37fcaa260e985 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -407,6 +407,12 @@ nouveau_mem_vram_init(struct drm_device *dev)
 	ret = pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(dma_bits));
 	if (ret)
 		return ret;
+	ret = pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(dma_bits));
+	if (ret) {
+		/* Reset to default value. */
+		pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(32));
+	}
+
 
 	ret = nouveau_ttm_global_init(dev_priv);
 	if (ret)
diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
index b75258a9fe44d..ee1eb7cba798f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
+++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
@@ -8,88 +8,26 @@
 #define NV_CTXDMA_PAGE_MASK  (NV_CTXDMA_PAGE_SIZE - 1)
 
 struct nouveau_sgdma_be {
-	struct ttm_backend backend;
+	struct ttm_tt ttm;
 	struct drm_device *dev;
-
-	dma_addr_t *pages;
-	unsigned nr_pages;
-	bool unmap_pages;
-
 	u64 offset;
-	bool bound;
 };
 
-static int
-nouveau_sgdma_populate(struct ttm_backend *be, unsigned long num_pages,
-		       struct page **pages, struct page *dummy_read_page,
-		       dma_addr_t *dma_addrs)
-{
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
-	struct drm_device *dev = nvbe->dev;
-	int i;
-
-	NV_DEBUG(nvbe->dev, "num_pages = %ld\n", num_pages);
-
-	nvbe->pages = dma_addrs;
-	nvbe->nr_pages = num_pages;
-	nvbe->unmap_pages = true;
-
-	/* this code path isn't called and is incorrect anyways */
-	if (0) { /* dma_addrs[0] != DMA_ERROR_CODE) { */
-		nvbe->unmap_pages = false;
-		return 0;
-	}
-
-	for (i = 0; i < num_pages; i++) {
-		nvbe->pages[i] = pci_map_page(dev->pdev, pages[i], 0,
-					      PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
-		if (pci_dma_mapping_error(dev->pdev, nvbe->pages[i])) {
-			nvbe->nr_pages = --i;
-			be->func->clear(be);
-			return -EFAULT;
-		}
-	}
-
-	return 0;
-}
-
-static void
-nouveau_sgdma_clear(struct ttm_backend *be)
-{
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
-	struct drm_device *dev = nvbe->dev;
-
-	if (nvbe->bound)
-		be->func->unbind(be);
-
-	if (nvbe->unmap_pages) {
-		while (nvbe->nr_pages--) {
-			pci_unmap_page(dev->pdev, nvbe->pages[nvbe->nr_pages],
-				       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
-		}
-	}
-}
-
 static void
-nouveau_sgdma_destroy(struct ttm_backend *be)
+nouveau_sgdma_destroy(struct ttm_tt *ttm)
 {
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
+	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 
-	if (be) {
+	if (ttm) {
 		NV_DEBUG(nvbe->dev, "\n");
-
-		if (nvbe) {
-			if (nvbe->pages)
-				be->func->clear(be);
-			kfree(nvbe);
-		}
+		kfree(nvbe);
 	}
 }
 
 static int
-nv04_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
+nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
 {
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
+	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 	struct drm_device *dev = nvbe->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
@@ -99,8 +37,8 @@ nv04_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
 
 	nvbe->offset = mem->start << PAGE_SHIFT;
 	pte = (nvbe->offset >> NV_CTXDMA_PAGE_SHIFT) + 2;
-	for (i = 0; i < nvbe->nr_pages; i++) {
-		dma_addr_t dma_offset = nvbe->pages[i];
+	for (i = 0; i < ttm->num_pages; i++) {
+		dma_addr_t dma_offset = ttm->dma_address[i];
 		uint32_t offset_l = lower_32_bits(dma_offset);
 
 		for (j = 0; j < PAGE_SIZE / NV_CTXDMA_PAGE_SIZE; j++, pte++) {
@@ -109,14 +47,13 @@ nv04_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
 		}
 	}
 
-	nvbe->bound = true;
 	return 0;
 }
 
 static int
-nv04_sgdma_unbind(struct ttm_backend *be)
+nv04_sgdma_unbind(struct ttm_tt *ttm)
 {
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
+	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 	struct drm_device *dev = nvbe->dev;
 	struct drm_nouveau_private *dev_priv = dev->dev_private;
 	struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
@@ -124,22 +61,19 @@ nv04_sgdma_unbind(struct ttm_backend *be)
 
 	NV_DEBUG(dev, "\n");
 
-	if (!nvbe->bound)
+	if (ttm->state != tt_bound)
 		return 0;
 
 	pte = (nvbe->offset >> NV_CTXDMA_PAGE_SHIFT) + 2;
-	for (i = 0; i < nvbe->nr_pages; i++) {
+	for (i = 0; i < ttm->num_pages; i++) {
 		for (j = 0; j < PAGE_SIZE / NV_CTXDMA_PAGE_SIZE; j++, pte++)
 			nv_wo32(gpuobj, (pte * 4) + 0, 0x00000000);
 	}
 
-	nvbe->bound = false;
 	return 0;
 }
 
 static struct ttm_backend_func nv04_sgdma_backend = {
-	.populate		= nouveau_sgdma_populate,
-	.clear			= nouveau_sgdma_clear,
 	.bind			= nv04_sgdma_bind,
 	.unbind			= nv04_sgdma_unbind,
 	.destroy		= nouveau_sgdma_destroy
@@ -158,14 +92,14 @@ nv41_sgdma_flush(struct nouveau_sgdma_be *nvbe)
 }
 
 static int
-nv41_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
+nv41_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
 {
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
+	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 	struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
 	struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
-	dma_addr_t *list = nvbe->pages;
+	dma_addr_t *list = ttm->dma_address;
 	u32 pte = mem->start << 2;
-	u32 cnt = nvbe->nr_pages;
+	u32 cnt = ttm->num_pages;
 
 	nvbe->offset = mem->start << PAGE_SHIFT;
 
@@ -175,18 +109,17 @@ nv41_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
 	}
 
 	nv41_sgdma_flush(nvbe);
-	nvbe->bound = true;
 	return 0;
 }
 
 static int
-nv41_sgdma_unbind(struct ttm_backend *be)
+nv41_sgdma_unbind(struct ttm_tt *ttm)
 {
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
+	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 	struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
 	struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
 	u32 pte = (nvbe->offset >> 12) << 2;
-	u32 cnt = nvbe->nr_pages;
+	u32 cnt = ttm->num_pages;
 
 	while (cnt--) {
 		nv_wo32(pgt, pte, 0x00000000);
@@ -194,24 +127,22 @@ nv41_sgdma_unbind(struct ttm_backend *be)
 	}
 
 	nv41_sgdma_flush(nvbe);
-	nvbe->bound = false;
 	return 0;
 }
 
 static struct ttm_backend_func nv41_sgdma_backend = {
-	.populate		= nouveau_sgdma_populate,
-	.clear			= nouveau_sgdma_clear,
 	.bind			= nv41_sgdma_bind,
 	.unbind			= nv41_sgdma_unbind,
 	.destroy		= nouveau_sgdma_destroy
 };
 
 static void
-nv44_sgdma_flush(struct nouveau_sgdma_be *nvbe)
+nv44_sgdma_flush(struct ttm_tt *ttm)
 {
+	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 	struct drm_device *dev = nvbe->dev;
 
-	nv_wr32(dev, 0x100814, (nvbe->nr_pages - 1) << 12);
+	nv_wr32(dev, 0x100814, (ttm->num_pages - 1) << 12);
 	nv_wr32(dev, 0x100808, nvbe->offset | 0x20);
 	if (!nv_wait(dev, 0x100808, 0x00000001, 0x00000001))
 		NV_ERROR(dev, "gart flush timeout: 0x%08x\n",
@@ -270,14 +201,14 @@ nv44_sgdma_fill(struct nouveau_gpuobj *pgt, dma_addr_t *list, u32 base, u32 cnt)
 }
 
 static int
-nv44_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
+nv44_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
 {
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
+	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 	struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
 	struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
-	dma_addr_t *list = nvbe->pages;
+	dma_addr_t *list = ttm->dma_address;
 	u32 pte = mem->start << 2, tmp[4];
-	u32 cnt = nvbe->nr_pages;
+	u32 cnt = ttm->num_pages;
 	int i;
 
 	nvbe->offset = mem->start << PAGE_SHIFT;
@@ -305,19 +236,18 @@ nv44_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
 	if (cnt)
 		nv44_sgdma_fill(pgt, list, pte, cnt);
 
-	nv44_sgdma_flush(nvbe);
-	nvbe->bound = true;
+	nv44_sgdma_flush(ttm);
 	return 0;
 }
 
 static int
-nv44_sgdma_unbind(struct ttm_backend *be)
+nv44_sgdma_unbind(struct ttm_tt *ttm)
 {
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
+	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 	struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
 	struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
 	u32 pte = (nvbe->offset >> 12) << 2;
-	u32 cnt = nvbe->nr_pages;
+	u32 cnt = ttm->num_pages;
 
 	if (pte & 0x0000000c) {
 		u32  max = 4 - ((pte >> 2) & 0x3);
@@ -339,55 +269,46 @@ nv44_sgdma_unbind(struct ttm_backend *be)
 	if (cnt)
 		nv44_sgdma_fill(pgt, NULL, pte, cnt);
 
-	nv44_sgdma_flush(nvbe);
-	nvbe->bound = false;
+	nv44_sgdma_flush(ttm);
 	return 0;
 }
 
 static struct ttm_backend_func nv44_sgdma_backend = {
-	.populate		= nouveau_sgdma_populate,
-	.clear			= nouveau_sgdma_clear,
 	.bind			= nv44_sgdma_bind,
 	.unbind			= nv44_sgdma_unbind,
 	.destroy		= nouveau_sgdma_destroy
 };
 
 static int
-nv50_sgdma_bind(struct ttm_backend *be, struct ttm_mem_reg *mem)
+nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
 {
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
 	struct nouveau_mem *node = mem->mm_node;
+
 	/* noop: bound in move_notify() */
-	node->pages = nvbe->pages;
-	nvbe->pages = (dma_addr_t *)node;
-	nvbe->bound = true;
+	node->pages = ttm->dma_address;
 	return 0;
 }
 
 static int
-nv50_sgdma_unbind(struct ttm_backend *be)
+nv50_sgdma_unbind(struct ttm_tt *ttm)
 {
-	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)be;
-	struct nouveau_mem *node = (struct nouveau_mem *)nvbe->pages;
 	/* noop: unbound in move_notify() */
-	nvbe->pages = node->pages;
-	node->pages = NULL;
-	nvbe->bound = false;
 	return 0;
 }
 
 static struct ttm_backend_func nv50_sgdma_backend = {
-	.populate		= nouveau_sgdma_populate,
-	.clear			= nouveau_sgdma_clear,
 	.bind			= nv50_sgdma_bind,
 	.unbind			= nv50_sgdma_unbind,
 	.destroy		= nouveau_sgdma_destroy
 };
 
-struct ttm_backend *
-nouveau_sgdma_init_ttm(struct drm_device *dev)
+struct ttm_tt *
+nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
+			 unsigned long size, uint32_t page_flags,
+			 struct page *dummy_read_page)
 {
-	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct drm_nouveau_private *dev_priv = nouveau_bdev(bdev);
+	struct drm_device *dev = dev_priv->dev;
 	struct nouveau_sgdma_be *nvbe;
 
 	nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
@@ -395,9 +316,12 @@ nouveau_sgdma_init_ttm(struct drm_device *dev)
 		return NULL;
 
 	nvbe->dev = dev;
+	nvbe->ttm.func = dev_priv->gart_info.func;
 
-	nvbe->backend.func = dev_priv->gart_info.func;
-	return &nvbe->backend;
+	if (ttm_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page)) {
+		return NULL;
+	}
+	return &nvbe->ttm;
 }
 
 int
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index b316b301152ff..abe1297b621bc 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -95,6 +95,7 @@ extern int radeon_hw_i2c;
 extern int radeon_pcie_gen2;
 extern int radeon_msi;
 
+extern int radeon_ttm_dma;
 /*
  * Copy from radeon_drv.h so we don't have to include both and have conflicting
  * symbol;
@@ -320,7 +321,6 @@ struct radeon_gart {
 	unsigned			table_size;
 	struct page			**pages;
 	dma_addr_t			*pages_addr;
-	bool				*ttm_alloced;
 	bool				ready;
 };
 
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index c33bc914d93df..7c31321df45b1 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -765,8 +765,14 @@ int radeon_device_init(struct radeon_device *rdev,
 	r = pci_set_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
 	if (r) {
 		rdev->need_dma32 = true;
+		dma_bits = 32;
 		printk(KERN_WARNING "radeon: No suitable DMA available.\n");
 	}
+	r = pci_set_consistent_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
+	if (r) {
+		pci_set_consistent_dma_mask(rdev->pdev, DMA_BIT_MASK(32));
+		printk(KERN_WARNING "radeon: No coherent DMA available.\n");
+	}
 
 	/* Registers mapping */
 	/* TODO: block userspace mapping of io register */
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index a0b35e9094896..bf917684ddda4 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -120,6 +120,10 @@ int radeon_disp_priority = 0;
 int radeon_hw_i2c = 0;
 int radeon_pcie_gen2 = 0;
 int radeon_msi = -1;
+int radeon_ttm_dma = 0;
+
+MODULE_PARM_DESC(ttm_dma, "Enable TTM DMA page pool always irregardless of DMA32 flag");
+module_param_named(ttm_dma, radeon_ttm_dma, int, 0444);
 
 MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers");
 module_param_named(no_wb, radeon_no_wb, int, 0444);
diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c
index ba7ab79e12c19..a4d981608580a 100644
--- a/drivers/gpu/drm/radeon/radeon_gart.c
+++ b/drivers/gpu/drm/radeon/radeon_gart.c
@@ -157,9 +157,6 @@ void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
 	p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 	for (i = 0; i < pages; i++, p++) {
 		if (rdev->gart.pages[p]) {
-			if (!rdev->gart.ttm_alloced[p])
-				pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
-						PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 			rdev->gart.pages[p] = NULL;
 			rdev->gart.pages_addr[p] = rdev->dummy_page.addr;
 			page_base = rdev->gart.pages_addr[p];
@@ -191,23 +188,7 @@ int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
 	p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 
 	for (i = 0; i < pages; i++, p++) {
-		/* we reverted the patch using dma_addr in TTM for now but this
-		 * code stops building on alpha so just comment it out for now */
-		if (0) { /*dma_addr[i] != DMA_ERROR_CODE) */
-			rdev->gart.ttm_alloced[p] = true;
-			rdev->gart.pages_addr[p] = dma_addr[i];
-		} else {
-			/* we need to support large memory configurations */
-			/* assume that unbind have already been call on the range */
-			rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
-							0, PAGE_SIZE,
-							PCI_DMA_BIDIRECTIONAL);
-			if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
-				/* FIXME: failed to map page (return -ENOMEM?) */
-				radeon_gart_unbind(rdev, offset, pages);
-				return -ENOMEM;
-			}
-		}
+		rdev->gart.pages_addr[p] = dma_addr[i];
 		rdev->gart.pages[p] = pagelist[i];
 		if (rdev->gart.ptr) {
 			page_base = rdev->gart.pages_addr[p];
@@ -274,12 +255,6 @@ int radeon_gart_init(struct radeon_device *rdev)
 		radeon_gart_fini(rdev);
 		return -ENOMEM;
 	}
-	rdev->gart.ttm_alloced = kzalloc(sizeof(bool) *
-					 rdev->gart.num_cpu_pages, GFP_KERNEL);
-	if (rdev->gart.ttm_alloced == NULL) {
-		radeon_gart_fini(rdev);
-		return -ENOMEM;
-	}
 	/* set GART entry to point to the dummy page by default */
 	for (i = 0; i < rdev->gart.num_cpu_pages; i++) {
 		rdev->gart.pages_addr[i] = rdev->dummy_page.addr;
@@ -296,10 +271,8 @@ void radeon_gart_fini(struct radeon_device *rdev)
 	rdev->gart.ready = false;
 	kfree(rdev->gart.pages);
 	kfree(rdev->gart.pages_addr);
-	kfree(rdev->gart.ttm_alloced);
 	rdev->gart.pages = NULL;
 	rdev->gart.pages_addr = NULL;
-	rdev->gart.ttm_alloced = NULL;
 
 	radeon_dummy_page_fini(rdev);
 }
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 0b5468bfaf544..0dc0048f565c0 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -114,24 +114,6 @@ static void radeon_ttm_global_fini(struct radeon_device *rdev)
 	}
 }
 
-struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev);
-
-static struct ttm_backend*
-radeon_create_ttm_backend_entry(struct ttm_bo_device *bdev)
-{
-	struct radeon_device *rdev;
-
-	rdev = radeon_get_rdev(bdev);
-#if __OS_HAS_AGP
-	if (rdev->flags & RADEON_IS_AGP) {
-		return ttm_agp_backend_init(bdev, rdev->ddev->agp->bridge);
-	} else
-#endif
-	{
-		return radeon_ttm_backend_create(rdev);
-	}
-}
-
 static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 {
 	return 0;
@@ -515,8 +497,157 @@ static bool radeon_sync_obj_signaled(void *sync_obj, void *sync_arg)
 	return radeon_fence_signaled((struct radeon_fence *)sync_obj);
 }
 
+/*
+ * TTM backend functions.
+ */
+struct radeon_ttm_tt {
+	struct ttm_tt			ttm;
+	struct radeon_device		*rdev;
+	u64				offset;
+};
+
+static int radeon_ttm_backend_bind(struct ttm_tt *ttm,
+				   struct ttm_mem_reg *bo_mem)
+{
+	struct radeon_ttm_tt *gtt;
+	int r;
+
+	gtt = container_of(ttm, struct radeon_ttm_tt, ttm);
+	gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
+	if (!ttm->num_pages) {
+		WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
+		     ttm->num_pages, bo_mem, ttm);
+	}
+	r = radeon_gart_bind(gtt->rdev, gtt->offset,
+			     ttm->num_pages, ttm->pages, ttm->dma_address);
+	if (r) {
+		DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
+			  ttm->num_pages, (unsigned)gtt->offset);
+		return r;
+	}
+	return 0;
+}
+
+static int radeon_ttm_backend_unbind(struct ttm_tt *ttm)
+{
+	struct radeon_ttm_tt *gtt;
+
+	gtt = container_of(ttm, struct radeon_ttm_tt, ttm);
+	radeon_gart_unbind(gtt->rdev, gtt->offset, ttm->num_pages);
+	return 0;
+}
+
+static void radeon_ttm_backend_destroy(struct ttm_tt *ttm)
+{
+	struct radeon_ttm_tt *gtt;
+
+	gtt = container_of(ttm, struct radeon_ttm_tt, ttm);
+	if (ttm->state == tt_bound) {
+		radeon_ttm_backend_unbind(ttm);
+	}
+	kfree(gtt);
+}
+
+static struct ttm_backend_func radeon_backend_func = {
+	.bind = &radeon_ttm_backend_bind,
+	.unbind = &radeon_ttm_backend_unbind,
+	.destroy = &radeon_ttm_backend_destroy,
+};
+
+struct ttm_tt *radeon_ttm_tt_create(struct ttm_bo_device *bdev,
+				    unsigned long size, uint32_t page_flags,
+				    struct page *dummy_read_page)
+{
+	struct radeon_device *rdev;
+	struct radeon_ttm_tt *gtt;
+
+	rdev = radeon_get_rdev(bdev);
+#if __OS_HAS_AGP
+	if (rdev->flags & RADEON_IS_AGP) {
+		return ttm_agp_tt_create(bdev, rdev->ddev->agp->bridge,
+					 size, page_flags, dummy_read_page);
+	}
+#endif
+
+	gtt = kzalloc(sizeof(struct radeon_ttm_tt), GFP_KERNEL);
+	if (gtt == NULL) {
+		return NULL;
+	}
+	gtt->ttm.func = &radeon_backend_func;
+	gtt->rdev = rdev;
+	if (ttm_tt_init(&gtt->ttm, bdev, size, page_flags, dummy_read_page)) {
+		return NULL;
+	}
+	return &gtt->ttm;
+}
+
+static int radeon_ttm_tt_populate(struct ttm_tt *ttm)
+{
+	struct radeon_device *rdev;
+	unsigned i;
+	int r;
+
+	if (ttm->state != tt_unpopulated)
+		return 0;
+
+	rdev = radeon_get_rdev(ttm->bdev);
+
+#ifdef CONFIG_SWIOTLB
+	if ((rdev->need_dma32 && swiotlb_nr_tbl()) || radeon_ttm_dma) {
+		return ttm_dma_populate(ttm, rdev->dev);
+	}
+#endif
+
+	r = ttm_page_alloc_ttm_tt_populate(ttm);
+	if (r) {
+		return r;
+	}
+
+	for (i = 0; i < ttm->num_pages; i++) {
+		ttm->dma_address[i] = pci_map_page(rdev->pdev, ttm->pages[i],
+						   0, PAGE_SIZE,
+						   PCI_DMA_BIDIRECTIONAL);
+		if (pci_dma_mapping_error(rdev->pdev, ttm->dma_address[i])) {
+			while (--i) {
+				pci_unmap_page(rdev->pdev, ttm->dma_address[i],
+					       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+				ttm->dma_address[i] = 0;
+			}
+			ttm_page_alloc_ttm_tt_unpopulate(ttm);
+			return -EFAULT;
+		}
+	}
+	return 0;
+}
+
+static void radeon_ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+	struct radeon_device *rdev;
+	unsigned i;
+
+	rdev = radeon_get_rdev(ttm->bdev);
+
+#ifdef CONFIG_SWIOTLB
+	if ((rdev->need_dma32 && swiotlb_nr_tbl()) || radeon_ttm_dma) {
+		ttm_dma_unpopulate(ttm, rdev->dev);
+		return;
+	}
+#endif
+
+	for (i = 0; i < ttm->num_pages; i++) {
+		if (ttm->dma_address[i]) {
+			pci_unmap_page(rdev->pdev, ttm->dma_address[i],
+				       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+		}
+	}
+
+	ttm_page_alloc_ttm_tt_unpopulate(ttm);
+}
+
 static struct ttm_bo_driver radeon_bo_driver = {
-	.create_ttm_backend_entry = &radeon_create_ttm_backend_entry,
+	.ttm_tt_create = &radeon_ttm_tt_create,
+	.ttm_tt_populate = &radeon_ttm_tt_populate,
+	.ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
 	.invalidate_caches = &radeon_invalidate_caches,
 	.init_mem_type = &radeon_init_mem_type,
 	.evict_flags = &radeon_evict_flags,
@@ -680,124 +811,6 @@ int radeon_mmap(struct file *filp, struct vm_area_struct *vma)
 }
 
 
-/*
- * TTM backend functions.
- */
-struct radeon_ttm_backend {
-	struct ttm_backend		backend;
-	struct radeon_device		*rdev;
-	unsigned long			num_pages;
-	struct page			**pages;
-	struct page			*dummy_read_page;
-	dma_addr_t			*dma_addrs;
-	bool				populated;
-	bool				bound;
-	unsigned			offset;
-};
-
-static int radeon_ttm_backend_populate(struct ttm_backend *backend,
-				       unsigned long num_pages,
-				       struct page **pages,
-				       struct page *dummy_read_page,
-				       dma_addr_t *dma_addrs)
-{
-	struct radeon_ttm_backend *gtt;
-
-	gtt = container_of(backend, struct radeon_ttm_backend, backend);
-	gtt->pages = pages;
-	gtt->dma_addrs = dma_addrs;
-	gtt->num_pages = num_pages;
-	gtt->dummy_read_page = dummy_read_page;
-	gtt->populated = true;
-	return 0;
-}
-
-static void radeon_ttm_backend_clear(struct ttm_backend *backend)
-{
-	struct radeon_ttm_backend *gtt;
-
-	gtt = container_of(backend, struct radeon_ttm_backend, backend);
-	gtt->pages = NULL;
-	gtt->dma_addrs = NULL;
-	gtt->num_pages = 0;
-	gtt->dummy_read_page = NULL;
-	gtt->populated = false;
-	gtt->bound = false;
-}
-
-
-static int radeon_ttm_backend_bind(struct ttm_backend *backend,
-				   struct ttm_mem_reg *bo_mem)
-{
-	struct radeon_ttm_backend *gtt;
-	int r;
-
-	gtt = container_of(backend, struct radeon_ttm_backend, backend);
-	gtt->offset = bo_mem->start << PAGE_SHIFT;
-	if (!gtt->num_pages) {
-		WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
-		     gtt->num_pages, bo_mem, backend);
-	}
-	r = radeon_gart_bind(gtt->rdev, gtt->offset,
-			     gtt->num_pages, gtt->pages, gtt->dma_addrs);
-	if (r) {
-		DRM_ERROR("failed to bind %lu pages at 0x%08X\n",
-			  gtt->num_pages, gtt->offset);
-		return r;
-	}
-	gtt->bound = true;
-	return 0;
-}
-
-static int radeon_ttm_backend_unbind(struct ttm_backend *backend)
-{
-	struct radeon_ttm_backend *gtt;
-
-	gtt = container_of(backend, struct radeon_ttm_backend, backend);
-	radeon_gart_unbind(gtt->rdev, gtt->offset, gtt->num_pages);
-	gtt->bound = false;
-	return 0;
-}
-
-static void radeon_ttm_backend_destroy(struct ttm_backend *backend)
-{
-	struct radeon_ttm_backend *gtt;
-
-	gtt = container_of(backend, struct radeon_ttm_backend, backend);
-	if (gtt->bound) {
-		radeon_ttm_backend_unbind(backend);
-	}
-	kfree(gtt);
-}
-
-static struct ttm_backend_func radeon_backend_func = {
-	.populate = &radeon_ttm_backend_populate,
-	.clear = &radeon_ttm_backend_clear,
-	.bind = &radeon_ttm_backend_bind,
-	.unbind = &radeon_ttm_backend_unbind,
-	.destroy = &radeon_ttm_backend_destroy,
-};
-
-struct ttm_backend *radeon_ttm_backend_create(struct radeon_device *rdev)
-{
-	struct radeon_ttm_backend *gtt;
-
-	gtt = kzalloc(sizeof(struct radeon_ttm_backend), GFP_KERNEL);
-	if (gtt == NULL) {
-		return NULL;
-	}
-	gtt->backend.bdev = &rdev->mman.bdev;
-	gtt->backend.flags = 0;
-	gtt->backend.func = &radeon_backend_func;
-	gtt->rdev = rdev;
-	gtt->pages = NULL;
-	gtt->num_pages = 0;
-	gtt->dummy_read_page = NULL;
-	gtt->populated = false;
-	gtt->bound = false;
-	return &gtt->backend;
-}
-
 #define RADEON_DEBUGFS_MEM_TYPES 2
 
 #if defined(CONFIG_DEBUG_FS)
@@ -820,8 +833,8 @@ static int radeon_mm_dump_table(struct seq_file *m, void *data)
 static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
 {
 #if defined(CONFIG_DEBUG_FS)
-	static struct drm_info_list radeon_mem_types_list[RADEON_DEBUGFS_MEM_TYPES+1];
-	static char radeon_mem_types_names[RADEON_DEBUGFS_MEM_TYPES+1][32];
+	static struct drm_info_list radeon_mem_types_list[RADEON_DEBUGFS_MEM_TYPES+2];
+	static char radeon_mem_types_names[RADEON_DEBUGFS_MEM_TYPES+2][32];
 	unsigned i;
 
 	for (i = 0; i < RADEON_DEBUGFS_MEM_TYPES; i++) {
@@ -843,8 +856,17 @@ static int radeon_ttm_debugfs_init(struct radeon_device *rdev)
 	radeon_mem_types_list[i].name = radeon_mem_types_names[i];
 	radeon_mem_types_list[i].show = &ttm_page_alloc_debugfs;
 	radeon_mem_types_list[i].driver_features = 0;
-	radeon_mem_types_list[i].data = NULL;
-	return radeon_debugfs_add_files(rdev, radeon_mem_types_list, RADEON_DEBUGFS_MEM_TYPES+1);
+	radeon_mem_types_list[i++].data = NULL;
+#ifdef CONFIG_SWIOTLB
+	if ((rdev->need_dma32 && swiotlb_nr_tbl()) || radeon_ttm_dma) {
+		sprintf(radeon_mem_types_names[i], "ttm_dma_page_pool");
+		radeon_mem_types_list[i].name = radeon_mem_types_names[i];
+		radeon_mem_types_list[i].show = &ttm_dma_page_alloc_debugfs;
+		radeon_mem_types_list[i].driver_features = 0;
+		radeon_mem_types_list[i++].data = NULL;
+	}
+#endif
+	return radeon_debugfs_add_files(rdev, radeon_mem_types_list, i);
 
 #endif
 	return 0;
diff --git a/drivers/gpu/drm/ttm/Makefile b/drivers/gpu/drm/ttm/Makefile
index f3cf6f02c9970..b2b33dde2afb0 100644
--- a/drivers/gpu/drm/ttm/Makefile
+++ b/drivers/gpu/drm/ttm/Makefile
@@ -7,4 +7,8 @@ ttm-y := ttm_agp_backend.o ttm_memory.o ttm_tt.o ttm_bo.o \
 	ttm_object.o ttm_lock.o ttm_execbuf_util.o ttm_page_alloc.o \
 	ttm_bo_manager.o
 
+ifeq ($(CONFIG_SWIOTLB),y)
+ttm-y += ttm_page_alloc_dma.o
+endif
+
 obj-$(CONFIG_DRM_TTM) += ttm.o
diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
index 1c4a72f681c16..14ebd3650aa9d 100644
--- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
+++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
@@ -40,45 +40,33 @@
 #include <asm/agp.h>
 
 struct ttm_agp_backend {
-	struct ttm_backend backend;
+	struct ttm_tt ttm;
 	struct agp_memory *mem;
 	struct agp_bridge_data *bridge;
 };
 
-static int ttm_agp_populate(struct ttm_backend *backend,
-			    unsigned long num_pages, struct page **pages,
-			    struct page *dummy_read_page,
-			    dma_addr_t *dma_addrs)
+static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
 {
-	struct ttm_agp_backend *agp_be =
-	    container_of(backend, struct ttm_agp_backend, backend);
-	struct page **cur_page, **last_page = pages + num_pages;
+	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
+	struct drm_mm_node *node = bo_mem->mm_node;
 	struct agp_memory *mem;
+	int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
+	unsigned i;
 
-	mem = agp_allocate_memory(agp_be->bridge, num_pages, AGP_USER_MEMORY);
+	mem = agp_allocate_memory(agp_be->bridge, ttm->num_pages, AGP_USER_MEMORY);
 	if (unlikely(mem == NULL))
 		return -ENOMEM;
 
 	mem->page_count = 0;
-	for (cur_page = pages; cur_page < last_page; ++cur_page) {
-		struct page *page = *cur_page;
+	for (i = 0; i < ttm->num_pages; i++) {
+		struct page *page = ttm->pages[i];
+
 		if (!page)
-			page = dummy_read_page;
+			page = ttm->dummy_read_page;
 
 		mem->pages[mem->page_count++] = page;
 	}
 	agp_be->mem = mem;
-	return 0;
-}
-
-static int ttm_agp_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
-{
-	struct ttm_agp_backend *agp_be =
-	    container_of(backend, struct ttm_agp_backend, backend);
-	struct drm_mm_node *node = bo_mem->mm_node;
-	struct agp_memory *mem = agp_be->mem;
-	int cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
-	int ret;
 
 	mem->is_flushed = 1;
 	mem->type = (cached) ? AGP_USER_CACHED_MEMORY : AGP_USER_MEMORY;
@@ -90,50 +78,38 @@ static int ttm_agp_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
 	return ret;
 }
 
-static int ttm_agp_unbind(struct ttm_backend *backend)
+static int ttm_agp_unbind(struct ttm_tt *ttm)
 {
-	struct ttm_agp_backend *agp_be =
-	    container_of(backend, struct ttm_agp_backend, backend);
-
-	if (agp_be->mem->is_bound)
-		return agp_unbind_memory(agp_be->mem);
-	else
-		return 0;
-}
+	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
 
-static void ttm_agp_clear(struct ttm_backend *backend)
-{
-	struct ttm_agp_backend *agp_be =
-	    container_of(backend, struct ttm_agp_backend, backend);
-	struct agp_memory *mem = agp_be->mem;
-
-	if (mem) {
-		ttm_agp_unbind(backend);
-		agp_free_memory(mem);
+	if (agp_be->mem) {
+		if (agp_be->mem->is_bound)
+			return agp_unbind_memory(agp_be->mem);
+		agp_free_memory(agp_be->mem);
+		agp_be->mem = NULL;
 	}
-	agp_be->mem = NULL;
+	return 0;
 }
 
-static void ttm_agp_destroy(struct ttm_backend *backend)
+static void ttm_agp_destroy(struct ttm_tt *ttm)
 {
-	struct ttm_agp_backend *agp_be =
-	    container_of(backend, struct ttm_agp_backend, backend);
+	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
 
 	if (agp_be->mem)
-		ttm_agp_clear(backend);
+		ttm_agp_unbind(ttm);
 	kfree(agp_be);
 }
 
 static struct ttm_backend_func ttm_agp_func = {
-	.populate = ttm_agp_populate,
-	.clear = ttm_agp_clear,
 	.bind = ttm_agp_bind,
 	.unbind = ttm_agp_unbind,
 	.destroy = ttm_agp_destroy,
 };
 
-struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
-					 struct agp_bridge_data *bridge)
+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)
 {
 	struct ttm_agp_backend *agp_be;
 
@@ -143,10 +119,14 @@ struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
 
 	agp_be->mem = NULL;
 	agp_be->bridge = bridge;
-	agp_be->backend.func = &ttm_agp_func;
-	agp_be->backend.bdev = bdev;
-	return &agp_be->backend;
+	agp_be->ttm.func = &ttm_agp_func;
+
+	if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
+		return NULL;
+	}
+
+	return &agp_be->ttm;
 }
-EXPORT_SYMBOL(ttm_agp_backend_init);
+EXPORT_SYMBOL(ttm_agp_tt_create);
 
 #endif
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 617b64678fc62..c31f40f0a1741 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -337,27 +337,11 @@ static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
 		if (zero_alloc)
 			page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
 	case ttm_bo_type_kernel:
-		bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
-					page_flags, glob->dummy_read_page);
+		bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
+						      page_flags, glob->dummy_read_page);
 		if (unlikely(bo->ttm == NULL))
 			ret = -ENOMEM;
 		break;
-	case ttm_bo_type_user:
-		bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
-					page_flags | TTM_PAGE_FLAG_USER,
-					glob->dummy_read_page);
-		if (unlikely(bo->ttm == NULL)) {
-			ret = -ENOMEM;
-			break;
-		}
-
-		ret = ttm_tt_set_user(bo->ttm, current,
-				      bo->buffer_start, bo->num_pages);
-		if (unlikely(ret != 0)) {
-			ttm_tt_destroy(bo->ttm);
-			bo->ttm = NULL;
-		}
-		break;
 	default:
 		printk(KERN_ERR TTM_PFX "Illegal buffer object type\n");
 		ret = -EINVAL;
@@ -907,16 +891,12 @@ static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
 }
 
 static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man,
-				 bool disallow_fixed,
 				 uint32_t mem_type,
 				 uint32_t proposed_placement,
 				 uint32_t *masked_placement)
 {
 	uint32_t cur_flags = ttm_bo_type_flags(mem_type);
 
-	if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && disallow_fixed)
-		return false;
-
 	if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0)
 		return false;
 
@@ -961,7 +941,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 		man = &bdev->man[mem_type];
 
 		type_ok = ttm_bo_mt_compatible(man,
-						bo->type == ttm_bo_type_user,
 						mem_type,
 						placement->placement[i],
 						&cur_flags);
@@ -1009,7 +988,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 		if (!man->has_type)
 			continue;
 		if (!ttm_bo_mt_compatible(man,
-						bo->type == ttm_bo_type_user,
 						mem_type,
 						placement->busy_placement[i],
 						&cur_flags))
@@ -1274,7 +1252,7 @@ int ttm_bo_create(struct ttm_bo_device *bdev,
 
 	size_t acc_size =
 	    ttm_bo_size(bdev->glob, (size + PAGE_SIZE - 1) >> PAGE_SHIFT);
-	ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
+	ret = ttm_mem_global_alloc(mem_glob, acc_size, false);
 	if (unlikely(ret != 0))
 		return ret;
 
@@ -1459,10 +1437,7 @@ int ttm_bo_global_init(struct drm_global_reference *ref)
 		goto out_no_shrink;
 	}
 
-	glob->ttm_bo_extra_size =
-		ttm_round_pot(sizeof(struct ttm_tt)) +
-		ttm_round_pot(sizeof(struct ttm_backend));
-
+	glob->ttm_bo_extra_size = ttm_round_pot(sizeof(struct ttm_tt));
 	glob->ttm_bo_size = glob->ttm_bo_extra_size +
 		ttm_round_pot(sizeof(struct ttm_buffer_object));
 
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 082fcaea583fb..60f204d67dbb6 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -244,7 +244,7 @@ static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
 				unsigned long page,
 				pgprot_t prot)
 {
-	struct page *d = ttm_tt_get_page(ttm, page);
+	struct page *d = ttm->pages[page];
 	void *dst;
 
 	if (!d)
@@ -281,7 +281,7 @@ static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
 				unsigned long page,
 				pgprot_t prot)
 {
-	struct page *s = ttm_tt_get_page(ttm, page);
+	struct page *s = ttm->pages[page];
 	void *src;
 
 	if (!s)
@@ -342,6 +342,12 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
 	if (old_iomap == NULL && ttm == NULL)
 		goto out2;
 
+	if (ttm->state == tt_unpopulated) {
+		ret = ttm->bdev->driver->ttm_tt_populate(ttm);
+		if (ret)
+			goto out1;
+	}
+
 	add = 0;
 	dir = 1;
 
@@ -502,10 +508,16 @@ static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
 {
 	struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
 	struct ttm_tt *ttm = bo->ttm;
-	struct page *d;
-	int i;
+	int ret;
 
 	BUG_ON(!ttm);
+
+	if (ttm->state == tt_unpopulated) {
+		ret = ttm->bdev->driver->ttm_tt_populate(ttm);
+		if (ret)
+			return ret;
+	}
+
 	if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) {
 		/*
 		 * We're mapping a single page, and the desired
@@ -513,18 +525,9 @@ static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
 		 */
 
 		map->bo_kmap_type = ttm_bo_map_kmap;
-		map->page = ttm_tt_get_page(ttm, start_page);
+		map->page = ttm->pages[start_page];
 		map->virtual = kmap(map->page);
 	} else {
-	    /*
-	     * Populate the part we're mapping;
-	     */
-		for (i = start_page; i < start_page + num_pages; ++i) {
-			d = ttm_tt_get_page(ttm, i);
-			if (!d)
-				return -ENOMEM;
-		}
-
 		/*
 		 * We need to use vmap to get the desired page protection
 		 * or to make the buffer object look contiguous.
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 221b924acebe2..bc1d751cbc1e2 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -174,18 +174,19 @@ static int ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 		vma->vm_page_prot = (bo->mem.placement & TTM_PL_FLAG_CACHED) ?
 		    vm_get_page_prot(vma->vm_flags) :
 		    ttm_io_prot(bo->mem.placement, vma->vm_page_prot);
-	}
 
-	/*
-	 * Speculatively prefault a number of pages. Only error on
-	 * first page.
-	 */
+		/* Allocate all page at once, most common usage */
+		if (ttm->bdev->driver->ttm_tt_populate(ttm)) {
+			retval = VM_FAULT_OOM;
+			goto out_io_unlock;
+		}
+	}
 
 	for (i = 0; i < TTM_BO_VM_NUM_PREFAULT; ++i) {
 		if (bo->mem.bus.is_iomem)
 			pfn = ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT) + page_offset;
 		else {
-			page = ttm_tt_get_page(ttm, page_offset);
+			page = ttm->pages[page_offset];
 			if (unlikely(!page && i == 0)) {
 				retval = VM_FAULT_OOM;
 				goto out_io_unlock;
diff --git a/drivers/gpu/drm/ttm/ttm_memory.c b/drivers/gpu/drm/ttm/ttm_memory.c
index e70ddd82dc022..3b12f05cdcde3 100644
--- a/drivers/gpu/drm/ttm/ttm_memory.c
+++ b/drivers/gpu/drm/ttm/ttm_memory.c
@@ -35,21 +35,10 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 
-#define TTM_MEMORY_ALLOC_RETRIES 4
-
-struct ttm_mem_zone {
-	struct kobject kobj;
-	struct ttm_mem_global *glob;
-	const char *name;
-	uint64_t zone_mem;
-	uint64_t emer_mem;
-	uint64_t max_mem;
-	uint64_t swap_limit;
-	uint64_t used_mem;
-};
+#define TTM_MEMORY_RETRIES 4
 
 static struct attribute ttm_mem_sys = {
-	.name = "zone_memory",
+	.name = "memory",
 	.mode = S_IRUGO
 };
 static struct attribute ttm_mem_emer = {
@@ -64,140 +53,141 @@ static struct attribute ttm_mem_swap = {
 	.name = "swap_limit",
 	.mode = S_IRUGO | S_IWUSR
 };
+static struct attribute ttm_mem_dma32_swap = {
+	.name = "swap_dma32_limit",
+	.mode = S_IRUGO | S_IWUSR
+};
 static struct attribute ttm_mem_used = {
 	.name = "used_memory",
 	.mode = S_IRUGO
 };
+static struct attribute ttm_mem_dma32_used = {
+	.name = "used_dma32_memory",
+	.mode = S_IRUGO
+};
 
-static void ttm_mem_zone_kobj_release(struct kobject *kobj)
-{
-	struct ttm_mem_zone *zone =
-		container_of(kobj, struct ttm_mem_zone, kobj);
-
-	printk(KERN_INFO TTM_PFX
-	       "Zone %7s: Used memory at exit: %llu kiB.\n",
-	       zone->name, (unsigned long long) zone->used_mem >> 10);
-	kfree(zone);
-}
-
-static ssize_t ttm_mem_zone_show(struct kobject *kobj,
-				 struct attribute *attr,
-				 char *buffer)
+static ssize_t ttm_mem_global_show(struct kobject *kobj,
+				   struct attribute *attr,
+				   char *buffer)
 {
-	struct ttm_mem_zone *zone =
-		container_of(kobj, struct ttm_mem_zone, kobj);
-	uint64_t val = 0;
+	struct ttm_mem_global *glob =
+		container_of(kobj, struct ttm_mem_global, kobj);
+	unsigned long val = 0;
 
-	spin_lock(&zone->glob->lock);
+	spin_lock(&glob->lock);
 	if (attr == &ttm_mem_sys)
-		val = zone->zone_mem;
+		val = glob->mem;
 	else if (attr == &ttm_mem_emer)
-		val = zone->emer_mem;
+		val = glob->emer_mem;
 	else if (attr == &ttm_mem_max)
-		val = zone->max_mem;
+		val = glob->max_mem;
 	else if (attr == &ttm_mem_swap)
-		val = zone->swap_limit;
+		val = glob->swap_limit;
 	else if (attr == &ttm_mem_used)
-		val = zone->used_mem;
-	spin_unlock(&zone->glob->lock);
+		val = glob->used_mem;
+	else if (attr == &ttm_mem_dma32_used)
+		val = glob->used_dma32_mem;
+	else if (attr == &ttm_mem_dma32_swap)
+		val = glob->swap_dma32_limit;
+	spin_unlock(&glob->lock);
 
-	return snprintf(buffer, PAGE_SIZE, "%llu\n",
-			(unsigned long long) val >> 10);
+	return snprintf(buffer, PAGE_SIZE, "%lu\n", val >> 10);
 }
 
 static void ttm_check_swapping(struct ttm_mem_global *glob);
 
-static ssize_t ttm_mem_zone_store(struct kobject *kobj,
-				  struct attribute *attr,
-				  const char *buffer,
-				  size_t size)
+static ssize_t ttm_mem_global_store(struct kobject *kobj,
+				    struct attribute *attr,
+				    const char *buffer,
+				    size_t size)
 {
-	struct ttm_mem_zone *zone =
-		container_of(kobj, struct ttm_mem_zone, kobj);
-	int chars;
+	struct ttm_mem_global *glob =
+		container_of(kobj, struct ttm_mem_global, kobj);
 	unsigned long val;
-	uint64_t val64;
+	int chars;
 
 	chars = sscanf(buffer, "%lu", &val);
 	if (chars == 0)
 		return size;
 
-	val64 = val;
-	val64 <<= 10;
+	val <<= 10;
+
+	spin_lock(&glob->lock);
+	/* limit to maximum memory */
+	if (val > glob->mem)
+		val = glob->mem;
 
-	spin_lock(&zone->glob->lock);
-	if (val64 > zone->zone_mem)
-		val64 = zone->zone_mem;
 	if (attr == &ttm_mem_emer) {
-		zone->emer_mem = val64;
-		if (zone->max_mem > val64)
-			zone->max_mem = val64;
+		glob->emer_mem = val;
+		if (glob->max_mem > val)
+			glob->max_mem = val;
 	} else if (attr == &ttm_mem_max) {
-		zone->max_mem = val64;
-		if (zone->emer_mem < val64)
-			zone->emer_mem = val64;
-	} else if (attr == &ttm_mem_swap)
-		zone->swap_limit = val64;
-	spin_unlock(&zone->glob->lock);
+		glob->max_mem = val;
+		if (glob->emer_mem < val)
+			glob->emer_mem = val;
+	} else if (attr == &ttm_mem_swap) {
+		glob->swap_limit = val;
+	} else if (attr == &ttm_mem_dma32_swap) {
+		glob->swap_dma32_limit = val;
+	}
+	spin_unlock(&glob->lock);
+	ttm_check_swapping(glob);
+	return size;
+}
 
-	ttm_check_swapping(zone->glob);
+static void ttm_mem_global_kobj_release(struct kobject *kobj)
+{
+	struct ttm_mem_global *glob =
+		container_of(kobj, struct ttm_mem_global, kobj);
 
-	return size;
+	kfree(glob);
 }
 
-static struct attribute *ttm_mem_zone_attrs[] = {
+static struct attribute *ttm_mem_global_attrs[] = {
 	&ttm_mem_sys,
 	&ttm_mem_emer,
 	&ttm_mem_max,
 	&ttm_mem_swap,
+	&ttm_mem_dma32_swap,
 	&ttm_mem_used,
+	&ttm_mem_dma32_used,
 	NULL
 };
 
-static const struct sysfs_ops ttm_mem_zone_ops = {
-	.show = &ttm_mem_zone_show,
-	.store = &ttm_mem_zone_store
+static const struct sysfs_ops ttm_mem_global_ops = {
+	.show = &ttm_mem_global_show,
+	.store = &ttm_mem_global_store
 };
 
-static struct kobj_type ttm_mem_zone_kobj_type = {
-	.release = &ttm_mem_zone_kobj_release,
-	.sysfs_ops = &ttm_mem_zone_ops,
-	.default_attrs = ttm_mem_zone_attrs,
-};
-
-static void ttm_mem_global_kobj_release(struct kobject *kobj)
-{
-	struct ttm_mem_global *glob =
-		container_of(kobj, struct ttm_mem_global, kobj);
-
-	kfree(glob);
-}
-
 static struct kobj_type ttm_mem_glob_kobj_type = {
 	.release = &ttm_mem_global_kobj_release,
+	.sysfs_ops = &ttm_mem_global_ops,
+	.default_attrs = ttm_mem_global_attrs,
 };
 
-static bool ttm_zones_above_swap_target(struct ttm_mem_global *glob,
-					bool from_wq, uint64_t extra)
+static bool ttm_above_swap_target(struct ttm_mem_global *glob,
+				  bool from_wq, uint64_t extra)
 {
-	unsigned int i;
-	struct ttm_mem_zone *zone;
-	uint64_t target;
+	unsigned long target;
 
-	for (i = 0; i < glob->num_zones; ++i) {
-		zone = glob->zones[i];
-
-		if (from_wq)
-			target = zone->swap_limit;
-		else if (capable(CAP_SYS_ADMIN))
-			target = zone->emer_mem;
+	if (from_wq) {
+		if (glob->used_mem > glob->swap_limit) {
+			return true;
+		}
+		if (glob->used_dma32_mem > glob->swap_dma32_limit) {
+			return true;
+		}
+	} else {
+		if (capable(CAP_SYS_ADMIN))
+			target = glob->emer_mem;
 		else
-			target = zone->max_mem;
-
-		target = (extra > target) ? 0ULL : target;
-
-		if (zone->used_mem > target)
+			target = glob->max_mem;
+		if (extra > target) {
 			return true;
+		}
+		if ((glob->used_mem + glob->used_dma32_mem) > target) {
+			return true;
+		}
 	}
 	return false;
 }
@@ -208,31 +198,31 @@ static bool ttm_zones_above_swap_target(struct ttm_mem_global *glob,
  * Note that this function is reentrant:
  * many threads may try to swap out at any given time.
  */
-
-static void ttm_shrink(struct ttm_mem_global *glob, bool from_wq,
+static void ttm_shrink(struct ttm_mem_global *glob,
+		       bool from_wq,
 		       uint64_t extra)
 {
-	int ret;
 	struct ttm_mem_shrink *shrink;
+	int ret, nretries = TTM_MEMORY_RETRIES;
 
 	spin_lock(&glob->lock);
 	if (glob->shrink == NULL)
 		goto out;
 
-	while (ttm_zones_above_swap_target(glob, from_wq, extra)) {
+	while (ttm_above_swap_target(glob, from_wq, extra)) {
 		shrink = glob->shrink;
 		spin_unlock(&glob->lock);
 		ret = shrink->do_shrink(shrink);
 		spin_lock(&glob->lock);
 		if (unlikely(ret != 0))
 			goto out;
+		if (--nretries < 0)
+			goto out;
 	}
 out:
 	spin_unlock(&glob->lock);
 }
 
-
-
 static void ttm_shrink_work(struct work_struct *work)
 {
 	struct ttm_mem_global *glob =
@@ -241,127 +231,10 @@ static void ttm_shrink_work(struct work_struct *work)
 	ttm_shrink(glob, true, 0ULL);
 }
 
-static int ttm_mem_init_kernel_zone(struct ttm_mem_global *glob,
-				    const struct sysinfo *si)
-{
-	struct ttm_mem_zone *zone = kzalloc(sizeof(*zone), GFP_KERNEL);
-	uint64_t mem;
-	int ret;
-
-	if (unlikely(!zone))
-		return -ENOMEM;
-
-	mem = si->totalram - si->totalhigh;
-	mem *= si->mem_unit;
-
-	zone->name = "kernel";
-	zone->zone_mem = mem;
-	zone->max_mem = mem >> 1;
-	zone->emer_mem = (mem >> 1) + (mem >> 2);
-	zone->swap_limit = zone->max_mem - (mem >> 3);
-	zone->used_mem = 0;
-	zone->glob = glob;
-	glob->zone_kernel = zone;
-	ret = kobject_init_and_add(
-		&zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
-	if (unlikely(ret != 0)) {
-		kobject_put(&zone->kobj);
-		return ret;
-	}
-	glob->zones[glob->num_zones++] = zone;
-	return 0;
-}
-
-#ifdef CONFIG_HIGHMEM
-static int ttm_mem_init_highmem_zone(struct ttm_mem_global *glob,
-				     const struct sysinfo *si)
-{
-	struct ttm_mem_zone *zone;
-	uint64_t mem;
-	int ret;
-
-	if (si->totalhigh == 0)
-		return 0;
-
-	zone = kzalloc(sizeof(*zone), GFP_KERNEL);
-	if (unlikely(!zone))
-		return -ENOMEM;
-
-	mem = si->totalram;
-	mem *= si->mem_unit;
-
-	zone->name = "highmem";
-	zone->zone_mem = mem;
-	zone->max_mem = mem >> 1;
-	zone->emer_mem = (mem >> 1) + (mem >> 2);
-	zone->swap_limit = zone->max_mem - (mem >> 3);
-	zone->used_mem = 0;
-	zone->glob = glob;
-	glob->zone_highmem = zone;
-	ret = kobject_init_and_add(
-		&zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
-	if (unlikely(ret != 0)) {
-		kobject_put(&zone->kobj);
-		return ret;
-	}
-	glob->zones[glob->num_zones++] = zone;
-	return 0;
-}
-#else
-static int ttm_mem_init_dma32_zone(struct ttm_mem_global *glob,
-				   const struct sysinfo *si)
-{
-	struct ttm_mem_zone *zone = kzalloc(sizeof(*zone), GFP_KERNEL);
-	uint64_t mem;
-	int ret;
-
-	if (unlikely(!zone))
-		return -ENOMEM;
-
-	mem = si->totalram;
-	mem *= si->mem_unit;
-
-	/**
-	 * No special dma32 zone needed.
-	 */
-
-	if (mem <= ((uint64_t) 1ULL << 32)) {
-		kfree(zone);
-		return 0;
-	}
-
-	/*
-	 * Limit max dma32 memory to 4GB for now
-	 * until we can figure out how big this
-	 * zone really is.
-	 */
-
-	mem = ((uint64_t) 1ULL << 32);
-	zone->name = "dma32";
-	zone->zone_mem = mem;
-	zone->max_mem = mem >> 1;
-	zone->emer_mem = (mem >> 1) + (mem >> 2);
-	zone->swap_limit = zone->max_mem - (mem >> 3);
-	zone->used_mem = 0;
-	zone->glob = glob;
-	glob->zone_dma32 = zone;
-	ret = kobject_init_and_add(
-		&zone->kobj, &ttm_mem_zone_kobj_type, &glob->kobj, zone->name);
-	if (unlikely(ret != 0)) {
-		kobject_put(&zone->kobj);
-		return ret;
-	}
-	glob->zones[glob->num_zones++] = zone;
-	return 0;
-}
-#endif
-
 int ttm_mem_global_init(struct ttm_mem_global *glob)
 {
 	struct sysinfo si;
 	int ret;
-	int i;
-	struct ttm_mem_zone *zone;
 
 	spin_lock_init(&glob->lock);
 	glob->swap_queue = create_singlethread_workqueue("ttm_swap");
@@ -374,50 +247,31 @@ int ttm_mem_global_init(struct ttm_mem_global *glob)
 		return ret;
 	}
 
+	/* compute limit */
 	si_meminfo(&si);
-
-	ret = ttm_mem_init_kernel_zone(glob, &si);
-	if (unlikely(ret != 0))
-		goto out_no_zone;
-#ifdef CONFIG_HIGHMEM
-	ret = ttm_mem_init_highmem_zone(glob, &si);
-	if (unlikely(ret != 0))
-		goto out_no_zone;
-#else
-	ret = ttm_mem_init_dma32_zone(glob, &si);
-	if (unlikely(ret != 0))
-		goto out_no_zone;
-#endif
-	for (i = 0; i < glob->num_zones; ++i) {
-		zone = glob->zones[i];
-		printk(KERN_INFO TTM_PFX
-		       "Zone %7s: Available graphics memory: %llu kiB.\n",
-		       zone->name, (unsigned long long) zone->max_mem >> 10);
-	}
-	ttm_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
+	glob->mem = si.totalram;
+	glob->mem *= si.mem_unit;
+	glob->used_mem = 0;
+	glob->used_dma32_mem = 0;
+	glob->max_mem = glob->mem >> 1;
+	glob->emer_mem = (glob->mem >> 1) + (glob->mem >> 2);
+	glob->swap_limit = glob->max_mem - (glob->mem >> 3);
+	glob->swap_dma32_limit = ((1ULL << 32) >> 1) - (((1ULL << 32) >> 3));
+	ttm_page_alloc_init(glob, glob->max_mem/(2*PAGE_SIZE));
+	ttm_dma_page_alloc_init(glob, glob->max_mem/(2*PAGE_SIZE));
 	return 0;
-out_no_zone:
-	ttm_mem_global_release(glob);
-	return ret;
 }
 EXPORT_SYMBOL(ttm_mem_global_init);
 
 void ttm_mem_global_release(struct ttm_mem_global *glob)
 {
-	unsigned int i;
-	struct ttm_mem_zone *zone;
-
 	/* let the page allocator first stop the shrink work. */
 	ttm_page_alloc_fini();
+	ttm_dma_page_alloc_fini();
 
 	flush_workqueue(glob->swap_queue);
 	destroy_workqueue(glob->swap_queue);
 	glob->swap_queue = NULL;
-	for (i = 0; i < glob->num_zones; ++i) {
-		zone = glob->zones[i];
-		kobject_del(&zone->kobj);
-		kobject_put(&zone->kobj);
-			}
 	kobject_del(&glob->kobj);
 	kobject_put(&glob->kobj);
 }
@@ -426,18 +280,14 @@ EXPORT_SYMBOL(ttm_mem_global_release);
 static void ttm_check_swapping(struct ttm_mem_global *glob)
 {
 	bool needs_swapping = false;
-	unsigned int i;
-	struct ttm_mem_zone *zone;
 
 	spin_lock(&glob->lock);
-	for (i = 0; i < glob->num_zones; ++i) {
-		zone = glob->zones[i];
-		if (zone->used_mem > zone->swap_limit) {
-			needs_swapping = true;
-			break;
-		}
+	if ((glob->used_mem + glob->used_dma32_mem) > glob->swap_limit) {
+		needs_swapping = true;
+	}
+	if (glob->used_dma32_mem > glob->swap_dma32_limit) {
+		needs_swapping = true;
 	}
-
 	spin_unlock(&glob->lock);
 
 	if (unlikely(needs_swapping))
@@ -445,141 +295,81 @@ static void ttm_check_swapping(struct ttm_mem_global *glob)
 
 }
 
-static void ttm_mem_global_free_zone(struct ttm_mem_global *glob,
-				     struct ttm_mem_zone *single_zone,
-				     uint64_t amount)
-{
-	unsigned int i;
-	struct ttm_mem_zone *zone;
-
-	spin_lock(&glob->lock);
-	for (i = 0; i < glob->num_zones; ++i) {
-		zone = glob->zones[i];
-		if (single_zone && zone != single_zone)
-			continue;
-		zone->used_mem -= amount;
-	}
-	spin_unlock(&glob->lock);
-}
-
 void ttm_mem_global_free(struct ttm_mem_global *glob,
 			 uint64_t amount)
 {
-	return ttm_mem_global_free_zone(glob, NULL, amount);
-}
-EXPORT_SYMBOL(ttm_mem_global_free);
-
-static int ttm_mem_global_reserve(struct ttm_mem_global *glob,
-				  struct ttm_mem_zone *single_zone,
-				  uint64_t amount, bool reserve)
-{
-	uint64_t limit;
-	int ret = -ENOMEM;
-	unsigned int i;
-	struct ttm_mem_zone *zone;
-
 	spin_lock(&glob->lock);
-	for (i = 0; i < glob->num_zones; ++i) {
-		zone = glob->zones[i];
-		if (single_zone && zone != single_zone)
-			continue;
-
-		limit = (capable(CAP_SYS_ADMIN)) ?
-			zone->emer_mem : zone->max_mem;
-
-		if (zone->used_mem > limit)
-			goto out_unlock;
-	}
-
-	if (reserve) {
-		for (i = 0; i < glob->num_zones; ++i) {
-			zone = glob->zones[i];
-			if (single_zone && zone != single_zone)
-				continue;
-			zone->used_mem += amount;
-		}
-	}
-
-	ret = 0;
-out_unlock:
+	glob->used_mem -= amount;
 	spin_unlock(&glob->lock);
-	ttm_check_swapping(glob);
-
-	return ret;
 }
+EXPORT_SYMBOL(ttm_mem_global_free);
 
-
-static int ttm_mem_global_alloc_zone(struct ttm_mem_global *glob,
-				     struct ttm_mem_zone *single_zone,
-				     uint64_t memory,
-				     bool no_wait, bool interruptible)
+int ttm_mem_global_alloc(struct ttm_mem_global *glob,
+			 uint64_t memory,
+			 bool no_wait)
 {
-	int count = TTM_MEMORY_ALLOC_RETRIES;
+	unsigned long limit;
+	int i;
 
-	while (unlikely(ttm_mem_global_reserve(glob,
-					       single_zone,
-					       memory, true)
-			!= 0)) {
+	for (i = 0; i < TTM_MEMORY_RETRIES; i++) {
+		spin_lock(&glob->lock);
+		limit = (capable(CAP_SYS_ADMIN)) ? glob->emer_mem : glob->max_mem;
+		if ((glob->used_mem + glob->used_dma32_mem + memory) < limit) {
+			glob->used_mem += memory;
+			spin_unlock(&glob->lock);
+			return 0;
+		}
+		spin_unlock(&glob->lock);
 		if (no_wait)
 			return -ENOMEM;
-		if (unlikely(count-- == 0))
-			return -ENOMEM;
 		ttm_shrink(glob, false, memory + (memory >> 2) + 16);
 	}
-
-	return 0;
+	return -ENOMEM;
 }
+EXPORT_SYMBOL(ttm_mem_global_alloc);
 
-int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
-			 bool no_wait, bool interruptible)
+int ttm_mem_global_alloc_pages(struct ttm_mem_global *glob,
+			       unsigned npages,
+			       bool no_wait)
 {
-	/**
-	 * Normal allocations of kernel memory are registered in
-	 * all zones.
-	 */
-
-	return ttm_mem_global_alloc_zone(glob, NULL, memory, no_wait,
-					 interruptible);
+	if (ttm_mem_global_alloc(glob, PAGE_SIZE * npages, no_wait))
+		return -ENOMEM;
+	ttm_check_swapping(glob);
+	return 0;
 }
-EXPORT_SYMBOL(ttm_mem_global_alloc);
 
-int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
-			      struct page *page,
-			      bool no_wait, bool interruptible)
+void ttm_mem_global_account_pages(struct ttm_mem_global *glob,
+				  struct page **pages,
+				  unsigned npages)
 {
+	unsigned i;
 
-	struct ttm_mem_zone *zone = NULL;
-
-	/**
-	 * Page allocations may be registed in a single zone
-	 * only if highmem or !dma32.
-	 */
-
-#ifdef CONFIG_HIGHMEM
-	if (PageHighMem(page) && glob->zone_highmem != NULL)
-		zone = glob->zone_highmem;
-#else
-	if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL)
-		zone = glob->zone_kernel;
-#endif
-	return ttm_mem_global_alloc_zone(glob, zone, PAGE_SIZE, no_wait,
-					 interruptible);
+	/* check if page is dma32 */
+	spin_lock(&glob->lock);
+	for (i = 0; i < npages; i++) {
+		if (page_to_pfn(pages[i]) > 0x00100000UL) {
+			glob->used_mem -= PAGE_SIZE;
+			glob->used_dma32_mem += PAGE_SIZE;
+		}
+	}
+	spin_unlock(&glob->lock);
 }
 
-void ttm_mem_global_free_page(struct ttm_mem_global *glob, struct page *page)
+void ttm_mem_global_free_pages(struct ttm_mem_global *glob,
+			       struct page **pages, unsigned npages)
 {
-	struct ttm_mem_zone *zone = NULL;
-
-#ifdef CONFIG_HIGHMEM
-	if (PageHighMem(page) && glob->zone_highmem != NULL)
-		zone = glob->zone_highmem;
-#else
-	if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL)
-		zone = glob->zone_kernel;
-#endif
-	ttm_mem_global_free_zone(glob, zone, PAGE_SIZE);
-}
+	unsigned i;
 
+	spin_lock(&glob->lock);
+	for (i = 0; i < npages; i++) {
+		if (page_to_pfn(pages[i]) > 0x00100000UL) {
+			glob->used_dma32_mem -= PAGE_SIZE;
+		} else {
+			glob->used_mem -= PAGE_SIZE;
+		}
+	}
+	spin_unlock(&glob->lock);
+}
 
 size_t ttm_round_pot(size_t size)
 {
diff --git a/drivers/gpu/drm/ttm/ttm_object.c b/drivers/gpu/drm/ttm/ttm_object.c
index 93577f2e2954d..662c6fc9dd14f 100644
--- a/drivers/gpu/drm/ttm/ttm_object.c
+++ b/drivers/gpu/drm/ttm/ttm_object.c
@@ -267,8 +267,7 @@ int ttm_ref_object_add(struct ttm_object_file *tfile,
 		}
 
 		read_unlock(&tfile->lock);
-		ret = ttm_mem_global_alloc(mem_glob, sizeof(*ref),
-					   false, false);
+		ret = ttm_mem_global_alloc(mem_glob, sizeof(*ref), false);
 		if (unlikely(ret != 0))
 			return ret;
 		ref = kmalloc(sizeof(*ref), GFP_KERNEL);
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 727e93daac3b0..ada2cad9b2b79 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -619,8 +619,10 @@ static void ttm_page_pool_fill_locked(struct ttm_page_pool *pool,
  * @return count of pages still required to fulfill the request.
  */
 static unsigned ttm_page_pool_get_pages(struct ttm_page_pool *pool,
-		struct list_head *pages, int ttm_flags,
-		enum ttm_caching_state cstate, unsigned count)
+					struct list_head *pages,
+					int ttm_flags,
+					enum ttm_caching_state cstate,
+					unsigned count)
 {
 	unsigned long irq_flags;
 	struct list_head *p;
@@ -664,13 +666,14 @@ out:
  * On success pages list will hold count number of correctly
  * cached pages.
  */
-int ttm_get_pages(struct list_head *pages, int flags,
-		  enum ttm_caching_state cstate, unsigned count,
-		  dma_addr_t *dma_address)
+int ttm_get_pages(struct page **pages, unsigned npages, int flags,
+		  enum ttm_caching_state cstate, dma_addr_t *dma_address)
 {
 	struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
 	struct page *p = NULL;
+	struct list_head plist;
 	gfp_t gfp_flags = GFP_USER;
+	unsigned count = 0;
 	int r;
 
 	/* set zero flag for page allocation if required */
@@ -684,94 +687,107 @@ int ttm_get_pages(struct list_head *pages, int flags,
 		else
 			gfp_flags |= GFP_HIGHUSER;
 
-		for (r = 0; r < count; ++r) {
-			p = alloc_page(gfp_flags);
-			if (!p) {
-
+		for (count = 0; count < npages; ++count) {
+			pages[count] = alloc_page(gfp_flags);
+			if (pages[count] == NULL) {
 				printk(KERN_ERR TTM_PFX
 				       "Unable to allocate page.");
 				return -ENOMEM;
 			}
-
-			list_add(&p->lru, pages);
 		}
 		return 0;
 	}
 
-
 	/* combine zero flag to pool flags */
 	gfp_flags |= pool->gfp_flags;
 
 	/* First we take pages from the pool */
-	count = ttm_page_pool_get_pages(pool, pages, flags, cstate, count);
+	INIT_LIST_HEAD(&plist);
+	npages = ttm_page_pool_get_pages(pool, &plist, flags, cstate, npages);
 
 	/* clear the pages coming from the pool if requested */
+	count = 0;
+	list_for_each_entry(p, &plist, lru) {
+		pages[count++] = p;
+	}
 	if (flags & TTM_PAGE_FLAG_ZERO_ALLOC) {
-		list_for_each_entry(p, pages, lru) {
+		list_for_each_entry(p, &plist, lru) {
 			clear_page(page_address(p));
 		}
 	}
 
 	/* If pool didn't have enough pages allocate new one. */
-	if (count > 0) {
+	if (npages > 0) {
 		/* ttm_alloc_new_pages doesn't reference pool so we can run
 		 * multiple requests in parallel.
 		 **/
-		r = ttm_alloc_new_pages(pages, gfp_flags, flags, cstate, count);
+		INIT_LIST_HEAD(&plist);
+		r = ttm_alloc_new_pages(&plist, gfp_flags, flags, cstate, npages);
+		list_for_each_entry(p, &plist, lru) {
+			pages[count++] = p;
+		}
 		if (r) {
 			/* If there is any pages in the list put them back to
 			 * the pool. */
 			printk(KERN_ERR TTM_PFX
 			       "Failed to allocate extra pages "
 			       "for large request.");
-			ttm_put_pages(pages, 0, flags, cstate, NULL);
+			ttm_put_pages(pages, count, flags, cstate, NULL);
 			return r;
 		}
 	}
 
-
 	return 0;
 }
 
 /* Put all pages in pages list to correct pool to wait for reuse */
-void ttm_put_pages(struct list_head *pages, unsigned page_count, int flags,
+void ttm_put_pages(struct page **pages, unsigned npages, int flags,
 		   enum ttm_caching_state cstate, dma_addr_t *dma_address)
 {
 	unsigned long irq_flags;
 	struct ttm_page_pool *pool = ttm_get_pool(flags, cstate);
-	struct page *p, *tmp;
+	unsigned i;
 
 	if (pool == NULL) {
 		/* No pool for this memory type so free the pages */
 
-		list_for_each_entry_safe(p, tmp, pages, lru) {
-			__free_page(p);
+		for (i = 0; i < npages; i++) {
+			if (pages[i]) {
+				if (page_count(pages[i]) != 1)
+					printk(KERN_ERR TTM_PFX
+						"Erroneous page count. "
+						"Leaking pages.\n");
+				__free_page(pages[i]);
+				pages[i] = NULL;
+			}
 		}
-		/* Make the pages list empty */
-		INIT_LIST_HEAD(pages);
 		return;
 	}
-	if (page_count == 0) {
-		list_for_each_entry_safe(p, tmp, pages, lru) {
-			++page_count;
-		}
-	}
 
 	spin_lock_irqsave(&pool->lock, irq_flags);
-	list_splice_init(pages, &pool->list);
-	pool->npages += page_count;
+	for (i = 0; i < npages; i++) {
+		if (pages[i]) {
+			if (page_count(pages[i]) != 1)
+				printk(KERN_ERR TTM_PFX
+					"Erroneous page count. "
+					"Leaking pages.\n");
+			list_add_tail(&pages[i]->lru, &pool->list);
+			pages[i] = NULL;
+			pool->npages++;
+		}
+	}
 	/* Check that we don't go over the pool limit */
-	page_count = 0;
+	npages = 0;
 	if (pool->npages > _manager->options.max_size) {
-		page_count = pool->npages - _manager->options.max_size;
+		npages = pool->npages - _manager->options.max_size;
 		/* free at least NUM_PAGES_TO_ALLOC number of pages
 		 * to reduce calls to set_memory_wb */
-		if (page_count < NUM_PAGES_TO_ALLOC)
-			page_count = NUM_PAGES_TO_ALLOC;
+		if (npages < NUM_PAGES_TO_ALLOC)
+			npages = NUM_PAGES_TO_ALLOC;
 	}
 	spin_unlock_irqrestore(&pool->lock, irq_flags);
-	if (page_count)
-		ttm_page_pool_free(pool, page_count);
+	if (npages)
+		ttm_page_pool_free(pool, npages);
 }
 
 static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, int flags,
@@ -836,6 +852,51 @@ void ttm_page_alloc_fini(void)
 	_manager = NULL;
 }
 
+int ttm_page_alloc_ttm_tt_populate(struct ttm_tt *ttm)
+{
+	struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
+	int ret;
+
+	if (ttm->state != tt_unpopulated)
+		return 0;
+
+	ret = ttm_mem_global_alloc_pages(mem_glob, ttm->num_pages, false);
+	if (unlikely(ret != 0))
+		return -ENOMEM;
+
+	ret = ttm_get_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
+			    ttm->caching_state, ttm->dma_address);
+	if (ret != 0) {
+		ttm_mem_global_free(mem_glob, ttm->num_pages * PAGE_SIZE);
+		return -ENOMEM;
+	}
+
+	ttm_mem_global_account_pages(mem_glob, ttm->pages, ttm->num_pages);
+
+	if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
+		ret = ttm_tt_swapin(ttm);
+		if (unlikely(ret != 0)) {
+			ttm_page_alloc_ttm_tt_unpopulate(ttm);
+			return ret;
+		}
+	}
+
+	ttm->state = tt_unbound;
+	return 0;
+}
+EXPORT_SYMBOL(ttm_page_alloc_ttm_tt_populate);
+
+void ttm_page_alloc_ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+	struct ttm_mem_global *glob = ttm->glob->mem_glob;
+
+	ttm_mem_global_free_pages(glob, ttm->pages, ttm->num_pages);
+	ttm_put_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
+			ttm->caching_state, ttm->dma_address);
+	ttm->state = tt_unpopulated;
+}
+EXPORT_SYMBOL(ttm_page_alloc_ttm_tt_unpopulate);
+
 int ttm_page_alloc_debugfs(struct seq_file *m, void *data)
 {
 	struct ttm_page_pool *p;
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
new file mode 100644
index 0000000000000..0850836e669be
--- /dev/null
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
@@ -0,0 +1,1235 @@
+/*
+ * Copyright 2011 (c) Oracle Corp.
+
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+ */
+
+/*
+ * A simple DMA pool losely based on dmapool.c. It has certain advantages
+ * over the DMA pools:
+ * - Pool collects resently freed pages for reuse (and hooks up to
+ *   the shrinker).
+ * - Tracks currently in use pages
+ * - Tracks whether the page is UC, WB or cached (and reverts to WB
+ *   when freed).
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/list.h>
+#include <linux/seq_file.h> /* for seq_printf */
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/highmem.h>
+#include <linux/mm_types.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/atomic.h>
+#include <linux/device.h>
+#include <linux/kthread.h>
+#include "ttm/ttm_bo_driver.h"
+#include "ttm/ttm_page_alloc.h"
+#ifdef TTM_HAS_AGP
+#include <asm/agp.h>
+#endif
+
+#define NUM_PAGES_TO_ALLOC		(PAGE_SIZE/sizeof(struct page *))
+#define SMALL_ALLOCATION		16
+#define FREE_ALL_PAGES			(~0U)
+/* times are in msecs */
+#define IS_UNDEFINED			(0)
+#define IS_WC				(1<<1)
+#define IS_UC				(1<<2)
+#define IS_CACHED			(1<<3)
+#define IS_DMA32			(1<<4)
+
+enum pool_type {
+	POOL_IS_UNDEFINED,
+	POOL_IS_WC = IS_WC,
+	POOL_IS_UC = IS_UC,
+	POOL_IS_CACHED = IS_CACHED,
+	POOL_IS_WC_DMA32 = IS_WC | IS_DMA32,
+	POOL_IS_UC_DMA32 = IS_UC | IS_DMA32,
+	POOL_IS_CACHED_DMA32 = IS_CACHED | IS_DMA32,
+};
+/*
+ * The pool structure. There are usually six pools:
+ *  - generic (not restricted to DMA32):
+ *      - write combined, uncached, cached.
+ *  - dma32 (up to 2^32 - so up 4GB):
+ *      - write combined, uncached, cached.
+ * for each 'struct device'. The 'cached' is for pages that are actively used.
+ * The other ones can be shrunk by the shrinker API if neccessary.
+ * @pools: The 'struct device->dma_pools' link.
+ * @type: Type of the pool
+ * @lock: Protects the inuse_list and free_list from concurrnet access. Must be
+ * used with irqsave/irqrestore variants because pool allocator maybe called
+ * from delayed work.
+ * @inuse_list: Pool of pages that are in use. The order is very important and
+ *   it is in the order that the TTM pages that are put back are in.
+ * @free_list: Pool of pages that are free to be used. No order requirements.
+ * @dev: The device that is associated with these pools.
+ * @size: Size used during DMA allocation.
+ * @npages_free: Count of available pages for re-use.
+ * @npages_in_use: Count of pages that are in use.
+ * @nfrees: Stats when pool is shrinking.
+ * @nrefills: Stats when the pool is grown.
+ * @gfp_flags: Flags to pass for alloc_page.
+ * @fill_lock: Allows only one pool fill operation at time.
+ * @name: Name of the pool.
+ * @dev_name: Name derieved from dev - similar to how dev_info works.
+ *   Used during shutdown as the dev_info during release is unavailable.
+ */
+struct dma_pool {
+	struct list_head pools; /* The 'struct device->dma_pools link */
+	enum pool_type type;
+	spinlock_t lock;
+	struct list_head inuse_list;
+	struct list_head free_list;
+	struct device *dev;
+	unsigned size;
+	unsigned npages_free;
+	unsigned npages_in_use;
+	unsigned long nfrees; /* Stats when shrunk. */
+	unsigned long nrefills; /* Stats when grown. */
+	gfp_t gfp_flags;
+	bool fill_lock;
+	char name[13]; /* "cached dma32" */
+	char dev_name[64]; /* Constructed from dev */
+};
+
+/*
+ * The accounting page keeping track of the allocated page along with
+ * the DMA address.
+ * @page_list: The link to the 'page_list' in 'struct dma_pool'.
+ * @vaddr: The virtual address of the page
+ * @dma: The bus address of the page. If the page is not allocated
+ *   via the DMA API, it will be -1.
+ */
+struct dma_page {
+	struct list_head page_list;
+	void *vaddr;
+	struct page *p;
+	dma_addr_t dma;
+};
+
+/*
+ * Limits for the pool. They are handled without locks because only place where
+ * they may change is in sysfs store. They won't have immediate effect anyway
+ * so forcing serialization to access them is pointless.
+ */
+
+struct ttm_pool_opts {
+	unsigned	alloc_size;
+	unsigned	max_size;
+	unsigned	small;
+};
+
+/*
+ * Contains the list of all of the 'struct device' and their corresponding
+ * DMA pools. Guarded by _mutex->lock.
+ * @pools: The link to 'struct ttm_pool_manager->pools'
+ * @dev: The 'struct device' associated with the 'pool'
+ * @pool: The 'struct dma_pool' associated with the 'dev'
+ */
+struct device_pools {
+	struct list_head pools;
+	struct device *dev;
+	struct dma_pool *pool;
+};
+
+/*
+ * struct ttm_pool_manager - Holds memory pools for fast allocation
+ *
+ * @lock: Lock used when adding/removing from pools
+ * @pools: List of 'struct device' and 'struct dma_pool' tuples.
+ * @options: Limits for the pool.
+ * @npools: Total amount of pools in existence.
+ * @shrinker: The structure used by [un|]register_shrinker
+ */
+struct ttm_pool_manager {
+	struct mutex		lock;
+	struct list_head	pools;
+	struct ttm_pool_opts	options;
+	unsigned		npools;
+	struct shrinker		mm_shrink;
+	struct kobject		kobj;
+};
+
+static struct ttm_pool_manager *_manager;
+
+static struct attribute ttm_page_pool_max = {
+	.name = "pool_max_size",
+	.mode = S_IRUGO | S_IWUSR
+};
+static struct attribute ttm_page_pool_small = {
+	.name = "pool_small_allocation",
+	.mode = S_IRUGO | S_IWUSR
+};
+static struct attribute ttm_page_pool_alloc_size = {
+	.name = "pool_allocation_size",
+	.mode = S_IRUGO | S_IWUSR
+};
+
+static struct attribute *ttm_pool_attrs[] = {
+	&ttm_page_pool_max,
+	&ttm_page_pool_small,
+	&ttm_page_pool_alloc_size,
+	NULL
+};
+
+static void ttm_pool_kobj_release(struct kobject *kobj)
+{
+	struct ttm_pool_manager *m =
+		container_of(kobj, struct ttm_pool_manager, kobj);
+	kfree(m);
+}
+
+static ssize_t ttm_pool_store(struct kobject *kobj, struct attribute *attr,
+			      const char *buffer, size_t size)
+{
+	struct ttm_pool_manager *m =
+		container_of(kobj, struct ttm_pool_manager, kobj);
+	int chars;
+	unsigned val;
+	chars = sscanf(buffer, "%u", &val);
+	if (chars == 0)
+		return size;
+
+	/* Convert kb to number of pages */
+	val = val / (PAGE_SIZE >> 10);
+
+	if (attr == &ttm_page_pool_max)
+		m->options.max_size = val;
+	else if (attr == &ttm_page_pool_small)
+		m->options.small = val;
+	else if (attr == &ttm_page_pool_alloc_size) {
+		if (val > NUM_PAGES_TO_ALLOC*8) {
+			printk(KERN_ERR TTM_PFX
+			       "Setting allocation size to %lu "
+			       "is not allowed. Recommended size is "
+			       "%lu\n",
+			       NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 7),
+			       NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
+			return size;
+		} else if (val > NUM_PAGES_TO_ALLOC) {
+			printk(KERN_WARNING TTM_PFX
+			       "Setting allocation size to "
+			       "larger than %lu is not recommended.\n",
+			       NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
+		}
+		m->options.alloc_size = val;
+	}
+
+	return size;
+}
+
+static ssize_t ttm_pool_show(struct kobject *kobj, struct attribute *attr,
+			     char *buffer)
+{
+	struct ttm_pool_manager *m =
+		container_of(kobj, struct ttm_pool_manager, kobj);
+	unsigned val = 0;
+
+	if (attr == &ttm_page_pool_max)
+		val = m->options.max_size;
+	else if (attr == &ttm_page_pool_small)
+		val = m->options.small;
+	else if (attr == &ttm_page_pool_alloc_size)
+		val = m->options.alloc_size;
+
+	val = val * (PAGE_SIZE >> 10);
+
+	return snprintf(buffer, PAGE_SIZE, "%u\n", val);
+}
+
+static const struct sysfs_ops ttm_pool_sysfs_ops = {
+	.show = &ttm_pool_show,
+	.store = &ttm_pool_store,
+};
+
+static struct kobj_type ttm_pool_kobj_type = {
+	.release = &ttm_pool_kobj_release,
+	.sysfs_ops = &ttm_pool_sysfs_ops,
+	.default_attrs = ttm_pool_attrs,
+};
+
+#ifndef CONFIG_X86
+static int set_pages_array_wb(struct page **pages, int addrinarray)
+{
+#ifdef TTM_HAS_AGP
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		unmap_page_from_agp(pages[i]);
+#endif
+	return 0;
+}
+
+static int set_pages_array_wc(struct page **pages, int addrinarray)
+{
+#ifdef TTM_HAS_AGP
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		map_page_into_agp(pages[i]);
+#endif
+	return 0;
+}
+
+static int set_pages_array_uc(struct page **pages, int addrinarray)
+{
+#ifdef TTM_HAS_AGP
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		map_page_into_agp(pages[i]);
+#endif
+	return 0;
+}
+#endif /* for !CONFIG_X86 */
+
+static int ttm_set_pages_caching(struct dma_pool *pool,
+				 struct page **pages, unsigned cpages)
+{
+	int r = 0;
+	/* Set page caching */
+	if (pool->type & IS_UC) {
+		r = set_pages_array_uc(pages, cpages);
+		if (r)
+			pr_err(TTM_PFX
+			       "%s: Failed to set %d pages to uc!\n",
+			       pool->dev_name, cpages);
+	}
+	if (pool->type & IS_WC) {
+		r = set_pages_array_wc(pages, cpages);
+		if (r)
+			pr_err(TTM_PFX
+			       "%s: Failed to set %d pages to wc!\n",
+			       pool->dev_name, cpages);
+	}
+	return r;
+}
+
+static void __ttm_dma_free_page(struct dma_pool *pool, struct dma_page *d_page)
+{
+	dma_addr_t dma = d_page->dma;
+	dma_free_coherent(pool->dev, pool->size, d_page->vaddr, dma);
+
+	kfree(d_page);
+	d_page = NULL;
+}
+static struct dma_page *__ttm_dma_alloc_page(struct dma_pool *pool)
+{
+	struct dma_page *d_page;
+
+	d_page = kmalloc(sizeof(struct dma_page), GFP_KERNEL);
+	if (!d_page)
+		return NULL;
+
+	d_page->vaddr = dma_alloc_coherent(pool->dev, pool->size,
+					   &d_page->dma,
+					   pool->gfp_flags);
+	if (d_page->vaddr)
+		d_page->p = virt_to_page(d_page->vaddr);
+	else {
+		kfree(d_page);
+		d_page = NULL;
+	}
+	return d_page;
+}
+static enum pool_type ttm_to_type(int flags, enum ttm_caching_state cstate)
+{
+	enum pool_type type = IS_UNDEFINED;
+
+	if (flags & TTM_PAGE_FLAG_DMA32)
+		type |= IS_DMA32;
+	if (cstate == tt_cached)
+		type |= IS_CACHED;
+	else if (cstate == tt_uncached)
+		type |= IS_UC;
+	else
+		type |= IS_WC;
+
+	return type;
+}
+
+static void ttm_pool_update_free_locked(struct dma_pool *pool,
+					unsigned freed_pages)
+{
+	pool->npages_free -= freed_pages;
+	pool->nfrees += freed_pages;
+
+}
+
+/* set memory back to wb and free the pages. */
+static void ttm_dma_pages_put(struct dma_pool *pool, struct list_head *d_pages,
+			      struct page *pages[], unsigned npages)
+{
+	struct dma_page *d_page, *tmp;
+
+	if (npages && set_pages_array_wb(pages, npages))
+		pr_err(TTM_PFX "%s: Failed to set %d pages to wb!\n",
+			pool->dev_name, npages);
+
+	if (npages > 1) {
+		pr_debug("%s: (%s:%d) Freeing %d pages at once (lockless).\n",
+			pool->dev_name, pool->name, current->pid, npages);
+	}
+
+	list_for_each_entry_safe(d_page, tmp, d_pages, page_list) {
+		list_del(&d_page->page_list);
+		__ttm_dma_free_page(pool, d_page);
+	}
+}
+
+/*
+ * Free pages from pool.
+ *
+ * To prevent hogging the ttm_swap process we only free NUM_PAGES_TO_ALLOC
+ * number of pages in one go.
+ *
+ * @pool: to free the pages from
+ * @nr_free: If set to true will free all pages in pool
+ **/
+static unsigned ttm_dma_page_pool_free(struct dma_pool *pool, unsigned nr_free)
+{
+	unsigned long irq_flags;
+	struct dma_page *dma_p, *tmp;
+	struct page **pages_to_free;
+	struct list_head d_pages;
+	unsigned freed_pages = 0,
+		 npages_to_free = nr_free;
+
+	if (NUM_PAGES_TO_ALLOC < nr_free)
+		npages_to_free = NUM_PAGES_TO_ALLOC;
+#if 0
+	if (nr_free > 1) {
+		pr_debug("%s: (%s:%d) Attempting to free %d (%d) pages\n",
+			pool->dev_name, pool->name, current->pid,
+			npages_to_free, nr_free);
+	}
+#endif
+	pages_to_free = kmalloc(npages_to_free * sizeof(struct page *),
+			GFP_KERNEL);
+
+	if (!pages_to_free) {
+		pr_err(TTM_PFX
+		       "%s: Failed to allocate memory for pool free operation.\n",
+			pool->dev_name);
+		return 0;
+	}
+	INIT_LIST_HEAD(&d_pages);
+restart:
+	spin_lock_irqsave(&pool->lock, irq_flags);
+
+	/* We picking the oldest ones off the list */
+	list_for_each_entry_safe_reverse(dma_p, tmp, &pool->free_list,
+					 page_list) {
+		if (freed_pages >= npages_to_free)
+			break;
+
+		/* Move the dma_page from one list to another. */
+		list_move(&dma_p->page_list, &d_pages);
+
+		pages_to_free[freed_pages++] = dma_p->p;
+		/* We can only remove NUM_PAGES_TO_ALLOC at a time. */
+		if (freed_pages >= NUM_PAGES_TO_ALLOC) {
+
+			ttm_pool_update_free_locked(pool, freed_pages);
+			/**
+			 * Because changing page caching is costly
+			 * we unlock the pool to prevent stalling.
+			 */
+			spin_unlock_irqrestore(&pool->lock, irq_flags);
+
+			ttm_dma_pages_put(pool, &d_pages, pages_to_free,
+					  freed_pages);
+
+			INIT_LIST_HEAD(&d_pages);
+
+			if (likely(nr_free != FREE_ALL_PAGES))
+				nr_free -= freed_pages;
+
+			if (NUM_PAGES_TO_ALLOC >= nr_free)
+				npages_to_free = nr_free;
+			else
+				npages_to_free = NUM_PAGES_TO_ALLOC;
+
+			freed_pages = 0;
+
+			/* free all so restart the processing */
+			if (nr_free)
+				goto restart;
+
+			/* Not allowed to fall through or break because
+			 * following context is inside spinlock while we are
+			 * outside here.
+			 */
+			goto out;
+
+		}
+	}
+
+	/* remove range of pages from the pool */
+	if (freed_pages) {
+		ttm_pool_update_free_locked(pool, freed_pages);
+		nr_free -= freed_pages;
+	}
+
+	spin_unlock_irqrestore(&pool->lock, irq_flags);
+
+	if (freed_pages)
+		ttm_dma_pages_put(pool, &d_pages, pages_to_free, freed_pages);
+out:
+	kfree(pages_to_free);
+	return nr_free;
+}
+
+static void ttm_dma_free_pool(struct device *dev, enum pool_type type)
+{
+	struct device_pools *p;
+	struct dma_pool *pool;
+
+	if (!dev)
+		return;
+
+	mutex_lock(&_manager->lock);
+	list_for_each_entry_reverse(p, &_manager->pools, pools) {
+		if (p->dev != dev)
+			continue;
+		pool = p->pool;
+		if (pool->type != type)
+			continue;
+
+		list_del(&p->pools);
+		kfree(p);
+		_manager->npools--;
+		break;
+	}
+	list_for_each_entry_reverse(pool, &dev->dma_pools, pools) {
+		if (pool->type != type)
+			continue;
+		/* Takes a spinlock.. */
+		ttm_dma_page_pool_free(pool, FREE_ALL_PAGES);
+		WARN_ON(((pool->npages_in_use + pool->npages_free) != 0));
+		/* This code path is called after _all_ references to the
+		 * struct device has been dropped - so nobody should be
+		 * touching it. In case somebody is trying to _add_ we are
+		 * guarded by the mutex. */
+		list_del(&pool->pools);
+		kfree(pool);
+		break;
+	}
+	mutex_unlock(&_manager->lock);
+}
+
+/*
+ * On free-ing of the 'struct device' this deconstructor is run.
+ * Albeit the pool might have already been freed earlier.
+ */
+static void ttm_dma_pool_release(struct device *dev, void *res)
+{
+	struct dma_pool *pool = *(struct dma_pool **)res;
+
+	if (pool)
+		ttm_dma_free_pool(dev, pool->type);
+}
+
+static int ttm_dma_pool_match(struct device *dev, void *res, void *match_data)
+{
+	return *(struct dma_pool **)res == match_data;
+}
+
+static struct dma_pool *ttm_dma_pool_init(struct device *dev, gfp_t flags,
+					  enum pool_type type)
+{
+	char *n[] = {"wc", "uc", "cached", " dma32", "unknown",};
+	enum pool_type t[] = {IS_WC, IS_UC, IS_CACHED, IS_DMA32, IS_UNDEFINED};
+	struct device_pools *sec_pool = NULL;
+	struct dma_pool *pool = NULL, **ptr;
+	unsigned i;
+	int ret = -ENODEV;
+	char *p;
+
+	if (!dev)
+		return NULL;
+
+	ptr = devres_alloc(ttm_dma_pool_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return NULL;
+
+	ret = -ENOMEM;
+
+	pool = kmalloc_node(sizeof(struct dma_pool), GFP_KERNEL,
+			    dev_to_node(dev));
+	if (!pool)
+		goto err_mem;
+
+	sec_pool = kmalloc_node(sizeof(struct device_pools), GFP_KERNEL,
+				dev_to_node(dev));
+	if (!sec_pool)
+		goto err_mem;
+
+	INIT_LIST_HEAD(&sec_pool->pools);
+	sec_pool->dev = dev;
+	sec_pool->pool =  pool;
+
+	INIT_LIST_HEAD(&pool->free_list);
+	INIT_LIST_HEAD(&pool->inuse_list);
+	INIT_LIST_HEAD(&pool->pools);
+	spin_lock_init(&pool->lock);
+	pool->dev = dev;
+	pool->npages_free = pool->npages_in_use = 0;
+	pool->nfrees = 0;
+	pool->gfp_flags = flags;
+	pool->size = PAGE_SIZE;
+	pool->type = type;
+	pool->nrefills = 0;
+	pool->fill_lock = false;
+	p = pool->name;
+	for (i = 0; i < 5; i++) {
+		if (type & t[i]) {
+			p += snprintf(p, sizeof(pool->name) - (p - pool->name),
+				      "%s", n[i]);
+		}
+	}
+	*p = 0;
+	/* We copy the name for pr_ calls b/c when dma_pool_destroy is called
+	 * - the kobj->name has already been deallocated.*/
+	snprintf(pool->dev_name, sizeof(pool->dev_name), "%s %s",
+		 dev_driver_string(dev), dev_name(dev));
+	mutex_lock(&_manager->lock);
+	/* You can get the dma_pool from either the global: */
+	list_add(&sec_pool->pools, &_manager->pools);
+	_manager->npools++;
+	/* or from 'struct device': */
+	list_add(&pool->pools, &dev->dma_pools);
+	mutex_unlock(&_manager->lock);
+
+	*ptr = pool;
+	devres_add(dev, ptr);
+
+	return pool;
+err_mem:
+	devres_free(ptr);
+	kfree(sec_pool);
+	kfree(pool);
+	return ERR_PTR(ret);
+}
+
+static struct dma_pool *ttm_dma_find_pool(struct device *dev,
+					  enum pool_type type)
+{
+	struct dma_pool *pool, *tmp, *found = NULL;
+
+	if (type == IS_UNDEFINED)
+		return found;
+
+	/* NB: We iterate on the 'struct dev' which has no spinlock, but
+	 * it does have a kref which we have taken. The kref is taken during
+	 * graphic driver loading - in the drm_pci_init it calls either
+	 * pci_dev_get or pci_register_driver which both end up taking a kref
+	 * on 'struct device'.
+	 *
+	 * On teardown, the graphic drivers end up quiescing the TTM (put_pages)
+	 * and calls the dev_res deconstructors: ttm_dma_pool_release. The nice
+	 * thing is at that point of time there are no pages associated with the
+	 * driver so this function will not be called.
+	 */
+	list_for_each_entry_safe(pool, tmp, &dev->dma_pools, pools) {
+		if (pool->type != type)
+			continue;
+		found = pool;
+		break;
+	}
+	return found;
+}
+
+/*
+ * Free pages the pages that failed to change the caching state. If there
+ * are pages that have changed their caching state already put them to the
+ * pool.
+ */
+static void ttm_dma_handle_caching_state_failure(struct dma_pool *pool,
+						 struct list_head *d_pages,
+						 struct page **failed_pages,
+						 unsigned cpages)
+{
+	struct dma_page *d_page, *tmp;
+	struct page *p;
+	unsigned i = 0;
+
+	p = failed_pages[0];
+	if (!p)
+		return;
+	/* Find the failed page. */
+	list_for_each_entry_safe(d_page, tmp, d_pages, page_list) {
+		if (d_page->p != p)
+			continue;
+		/* .. and then progress over the full list. */
+		list_del(&d_page->page_list);
+		__ttm_dma_free_page(pool, d_page);
+		if (++i < cpages)
+			p = failed_pages[i];
+		else
+			break;
+	}
+
+}
+
+/*
+ * Allocate 'count' pages, and put 'need' number of them on the
+ * 'pages' and as well on the 'dma_address' starting at 'dma_offset' offset.
+ * The full list of pages should also be on 'd_pages'.
+ * We return zero for success, and negative numbers as errors.
+ */
+static int ttm_dma_pool_alloc_new_pages(struct dma_pool *pool,
+					struct list_head *d_pages,
+					unsigned count)
+{
+	struct page **caching_array;
+	struct dma_page *dma_p;
+	struct page *p;
+	int r = 0;
+	unsigned i, cpages;
+	unsigned max_cpages = min(count,
+			(unsigned)(PAGE_SIZE/sizeof(struct page *)));
+
+	/* allocate array for page caching change */
+	caching_array = kmalloc(max_cpages*sizeof(struct page *), GFP_KERNEL);
+
+	if (!caching_array) {
+		pr_err(TTM_PFX
+		       "%s: Unable to allocate table for new pages.",
+			pool->dev_name);
+		return -ENOMEM;
+	}
+
+	if (count > 1) {
+		pr_debug("%s: (%s:%d) Getting %d pages\n",
+			pool->dev_name, pool->name, current->pid,
+			count);
+	}
+
+	for (i = 0, cpages = 0; i < count; ++i) {
+		dma_p = __ttm_dma_alloc_page(pool);
+		if (!dma_p) {
+			pr_err(TTM_PFX "%s: Unable to get page %u.\n",
+				pool->dev_name, i);
+
+			/* store already allocated pages in the pool after
+			 * setting the caching state */
+			if (cpages) {
+				r = ttm_set_pages_caching(pool, caching_array,
+							  cpages);
+				if (r)
+					ttm_dma_handle_caching_state_failure(
+						pool, d_pages, caching_array,
+						cpages);
+			}
+			r = -ENOMEM;
+			goto out;
+		}
+		p = dma_p->p;
+#ifdef CONFIG_HIGHMEM
+		/* gfp flags of highmem page should never be dma32 so we
+		 * we should be fine in such case
+		 */
+		if (!PageHighMem(p))
+#endif
+		{
+			caching_array[cpages++] = p;
+			if (cpages == max_cpages) {
+				/* Note: Cannot hold the spinlock */
+				r = ttm_set_pages_caching(pool, caching_array,
+						 cpages);
+				if (r) {
+					ttm_dma_handle_caching_state_failure(
+						pool, d_pages, caching_array,
+						cpages);
+					goto out;
+				}
+				cpages = 0;
+			}
+		}
+		list_add(&dma_p->page_list, d_pages);
+	}
+
+	if (cpages) {
+		r = ttm_set_pages_caching(pool, caching_array, cpages);
+		if (r)
+			ttm_dma_handle_caching_state_failure(pool, d_pages,
+					caching_array, cpages);
+	}
+out:
+	kfree(caching_array);
+	return r;
+}
+
+static int ttm_dma_check_alloc_list(struct ttm_tt *ttm)
+{
+	struct dma_page *d_page;
+	unsigned i = 0;
+
+	list_for_each_entry(d_page, &ttm->alloc_list, page_list) {
+		if (d_page->p != ttm->pages[i++]) {
+			pr_err(TTM_PFX "dma page list & array mismatch %d", i);
+			return -EINVAL;
+		}
+	}
+	return 0;
+}
+
+/*
+ * @return count of pages still required to fulfill the request.
+*/
+static int ttm_dma_page_pool_fill_locked(struct dma_pool *pool,
+					 unsigned count,
+					 unsigned long *irq_flags)
+{
+	int r = count;
+
+	if (pool->fill_lock)
+		return r;
+
+	pool->fill_lock = true;
+	if (count < _manager->options.small &&
+	    count > pool->npages_free) {
+		struct list_head d_pages;
+		unsigned alloc_size =  _manager->options.alloc_size;
+
+		INIT_LIST_HEAD(&d_pages);
+
+		spin_unlock_irqrestore(&pool->lock, *irq_flags);
+
+		/* Returns how many more are neccessary to fulfill the
+		 * request. */
+		r = ttm_dma_pool_alloc_new_pages(pool, &d_pages, alloc_size);
+
+		spin_lock_irqsave(&pool->lock, *irq_flags);
+		if (!r) {
+			/* Add the fresh to the end.. */
+			list_splice(&d_pages, &pool->free_list);
+			++pool->nrefills;
+			pool->npages_free += alloc_size;
+		} else {
+			struct dma_page *d_page;
+			unsigned cpages = 0;
+
+			pr_err(TTM_PFX "%s: Failed to fill %s pool (r:%d)!\n",
+				pool->dev_name, pool->name, r);
+
+			list_for_each_entry(d_page, &d_pages, page_list) {
+				cpages++;
+			}
+			list_splice_tail(&d_pages, &pool->free_list);
+			pool->npages_free += cpages;
+		}
+	}
+	pool->fill_lock = false;
+	return r;
+
+}
+
+/*
+ * @return count of pages still required to fulfill the request.
+ * The populate list is actually a stack (not that is matters as TTM
+ * allocates one page at a time.
+ */
+static int ttm_dma_pool_get_pages(struct dma_pool *pool,
+				  struct ttm_tt *ttm)
+{
+	struct dma_page *d_page, *tmp;
+	unsigned long irq_flags;
+	unsigned i, count = ttm->num_pages;
+	int r;
+
+	spin_lock_irqsave(&pool->lock, irq_flags);
+	r = ttm_dma_page_pool_fill_locked(pool, count, &irq_flags);
+	if (r < 0) {
+		pr_debug("%s: (%s:%d) Asked for %d, got %d %s.\n",
+			pool->dev_name, pool->name, current->pid, count, r,
+			(r < 0) ? "err:" : "pages");
+		goto out;
+	}
+	if (!pool->npages_free)
+		goto out;
+	if (count > 1) {
+		pr_debug("%s: (%s:%d) Looking in free list for %d pages. "\
+			 "(have %d pages free)\n",
+			 pool->dev_name, pool->name, current->pid, count,
+			 pool->npages_free);
+	}
+	i = 0;
+	/* We are holding the spinlock.. */
+	/* Note: The  the 'pages' (and inuse_list) is expected to be a stack,
+	 * so we put the entries in the right order (and on the inuse list
+	 * in the reverse order to compenstate for freeing - which inverts the
+	 * 'pages' order).
+	 */
+	list_for_each_entry_safe(d_page, tmp, &pool->free_list, page_list) {
+		ttm->pages[i] = d_page->p;
+		ttm->dma_address[i] = d_page->dma;
+		i++;
+		list_move_tail(&d_page->page_list, &ttm->alloc_list);
+		if (i == count)
+			break;
+	}
+	count -= i;
+	pool->npages_in_use += i;
+	pool->npages_free -= i;
+out:
+	spin_unlock_irqrestore(&pool->lock, irq_flags);
+	if (count)
+		pr_debug("%s: (%s:%d) Need %d more.\n",
+			pool->dev_name, pool->name, current->pid, count);
+	return count;
+}
+
+/*
+ * On success pages list will hold count number of correctly
+ * cached pages. On failure will hold the negative return value (-ENOMEM, etc).
+ */
+int ttm_dma_populate(struct ttm_tt *ttm, struct device *dev)
+{
+	struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
+	struct dma_pool *pool;
+	gfp_t gfp_flags;
+	enum pool_type type;
+	unsigned i;
+	int r;
+
+	r = ttm_mem_global_alloc_pages(mem_glob, ttm->num_pages, false);
+	if (r)
+		return -ENOMEM;
+
+	type = ttm_to_type(ttm->page_flags, ttm->caching_state);
+
+	if (ttm->page_flags & TTM_PAGE_FLAG_DMA32)
+		gfp_flags = GFP_USER | GFP_DMA32;
+	else
+		gfp_flags = GFP_HIGHUSER;
+
+	if (ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
+		gfp_flags |= __GFP_ZERO;
+
+	pool = ttm_dma_find_pool(dev, type);
+	if (!pool) {
+		pool = ttm_dma_pool_init(dev, gfp_flags, type);
+		if (IS_ERR_OR_NULL(pool)) {
+			ttm_mem_global_free(mem_glob, ttm->num_pages * PAGE_SIZE);
+			return -ENOMEM;
+		}
+	}
+
+	/* ?? we might want to check see if pages are already
+	 * alloced, for the moment just trust the caller
+	 */
+	INIT_LIST_HEAD(&ttm->alloc_list);
+	/* Take pages out of a pool (if applicable) */
+	r = ttm_dma_pool_get_pages(pool, ttm);
+	/* clear the pages coming from the pool if requested */
+	if (ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC) {
+		for (i = 0; i < (ttm->num_pages - r); i++) {
+			clear_page(page_address(ttm->pages[i]));
+		}
+	}
+	/* If pool didn't have enough pages allocate new one. */
+	if (r > 0) {
+		struct list_head d_pages;
+		unsigned long irq_flags;
+		unsigned pages_need = r;
+
+		INIT_LIST_HEAD(&d_pages);
+		i = ttm->num_pages - pages_need;
+
+		/* Note, we are running without locking here..
+		 * and we have to manually add the stack to the inuse pool. */
+		r = ttm_dma_pool_alloc_new_pages(pool, &d_pages, pages_need);
+
+		if (r == 0) {
+			struct dma_page *d_page;
+
+			/* Since the pages are directly going to the inuse_list
+			 * which is stack based, lets treat it as a stack.
+			 */
+			list_for_each_entry(d_page, &d_pages, page_list) {
+				ttm->pages[i] = d_page->p;
+				ttm->dma_address[i] = d_page->dma;
+				i++;
+			}
+			list_splice_tail(&d_pages, &ttm->alloc_list);
+
+			spin_lock_irqsave(&pool->lock, irq_flags);
+			pool->npages_in_use += pages_need;
+			spin_unlock_irqrestore(&pool->lock, irq_flags);
+		} else {
+			struct dma_page *d_page;
+			unsigned cpages = 0;
+
+			/* If there is any pages in the list put them back to
+			 * the pool. */
+			pr_err(TTM_PFX
+			       "%s: Failed to allocate extra pages "
+			       "for large request.",
+				pool->dev_name);
+
+			list_for_each_entry(d_page, &d_pages, page_list) {
+				cpages++;
+			}
+			spin_lock_irqsave(&pool->lock, irq_flags);
+			pool->npages_free += cpages;
+			/* We don't care about ordering on the free_list. */
+			list_splice(&d_pages, &pool->free_list);
+			spin_unlock_irqrestore(&pool->lock, irq_flags);
+			ttm_mem_global_free(mem_glob, ttm->num_pages * PAGE_SIZE);
+			return -ENOMEM;
+		}
+	}
+	ttm_mem_global_account_pages(mem_glob, ttm->pages, ttm->num_pages);
+
+	if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
+		r = ttm_tt_swapin(ttm);
+		if (unlikely(r!= 0)) {
+			ttm_dma_unpopulate(ttm, dev);
+			return r;
+		}
+	}
+
+	ttm->state = tt_unbound;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ttm_dma_populate);
+
+/* Get good estimation how many pages are free in pools */
+static int ttm_dma_pool_get_num_unused_pages(void)
+{
+	struct device_pools *p;
+	unsigned total = 0;
+
+	mutex_lock(&_manager->lock);
+	list_for_each_entry(p, &_manager->pools, pools) {
+		if (p)
+			total += p->pool->npages_free;
+	}
+	mutex_unlock(&_manager->lock);
+	return total;
+}
+
+/* Put all pages in pages list to correct pool to wait for reuse */
+void ttm_dma_unpopulate(struct ttm_tt *ttm, struct device *dev)
+{
+	struct ttm_mem_global *glob = ttm->glob->mem_glob;
+	struct dma_pool *pool;
+	enum pool_type type;
+	bool is_cached = false;
+	unsigned count = 0, i;
+	unsigned long irq_flags;
+
+	ttm_mem_global_free_pages(glob, ttm->pages, ttm->num_pages);
+
+	type = ttm_to_type(ttm->page_flags, ttm->caching_state);
+	pool = ttm_dma_find_pool(dev, type);
+	if (!pool) {
+		WARN_ON(!pool);
+		return;
+	}
+	is_cached = (ttm_dma_find_pool(pool->dev,
+		     ttm_to_type(ttm->page_flags, tt_cached)) == pool);
+
+	if (ttm->num_pages > 1) {
+		dev_dbg(pool->dev, "(%s:%d) Attempting to %s %ld pages.\n",
+			pool->name, current->pid,
+			(is_cached) ?  "destroy" : "recycle", ttm->num_pages);
+	}
+
+	/* this should never happen, should we panic here ?*/
+	if (ttm_dma_check_alloc_list(ttm)) {
+		pr_err(TTM_PFX "Could not free the other ttm tt pages %ld!\n",
+		     ttm->num_pages);
+		return;
+	}
+
+	spin_lock_irqsave(&pool->lock, irq_flags);
+	count = 0;
+	pool->npages_in_use -= ttm->num_pages;
+	if (is_cached) {
+		pool->nfrees += ttm->num_pages;
+	} else {
+		pool->npages_free += ttm->num_pages;
+		list_splice(&ttm->alloc_list, &pool->free_list);
+		if (pool->npages_free > _manager->options.max_size) {
+			count = pool->npages_free - _manager->options.max_size;
+		}
+	}
+	spin_unlock_irqrestore(&pool->lock, irq_flags);
+
+	if (is_cached) {
+		ttm_dma_pages_put(pool, &ttm->alloc_list,
+				  ttm->pages, ttm->num_pages);
+	}
+
+	INIT_LIST_HEAD(&ttm->alloc_list);
+	for (i = 0; i < ttm->num_pages; i++) {
+		ttm->pages[i] = NULL;
+		ttm->dma_address[i] = 0;
+	}
+
+	/* shrink pool if necessary */
+	if (count)
+		ttm_dma_page_pool_free(pool, count);
+	ttm->state = tt_unpopulated;
+}
+EXPORT_SYMBOL_GPL(ttm_dma_unpopulate);
+
+/**
+ * Callback for mm to request pool to reduce number of page held.
+ */
+static int ttm_dma_pool_mm_shrink(struct shrinker *shrink,
+				  struct shrink_control *sc)
+{
+	static atomic_t start_pool = ATOMIC_INIT(0);
+	unsigned idx = 0;
+	unsigned pool_offset = atomic_add_return(1, &start_pool);
+	unsigned shrink_pages = sc->nr_to_scan;
+	struct device_pools *p;
+
+	if (list_empty(&_manager->pools))
+		return 0;
+
+	mutex_lock(&_manager->lock);
+	pool_offset = pool_offset % _manager->npools;
+	list_for_each_entry(p, &_manager->pools, pools) {
+		unsigned nr_free;
+
+		if (!p && !p->dev)
+			continue;
+		if (shrink_pages == 0)
+			break;
+		/* Do it in round-robin fashion. */
+		if (++idx < pool_offset)
+			continue;
+		nr_free = shrink_pages;
+		shrink_pages = ttm_dma_page_pool_free(p->pool, nr_free);
+		pr_debug("%s: (%s:%d) Asked to shrink %d, have %d more to go\n",
+			p->pool->dev_name, p->pool->name, current->pid, nr_free,
+			shrink_pages);
+	}
+	mutex_unlock(&_manager->lock);
+	/* return estimated number of unused pages in pool */
+	return ttm_dma_pool_get_num_unused_pages();
+}
+
+static void ttm_dma_pool_mm_shrink_init(struct ttm_pool_manager *manager)
+{
+	manager->mm_shrink.shrink = &ttm_dma_pool_mm_shrink;
+	manager->mm_shrink.seeks = 1;
+	register_shrinker(&manager->mm_shrink);
+}
+
+static void ttm_dma_pool_mm_shrink_fini(struct ttm_pool_manager *manager)
+{
+	unregister_shrinker(&manager->mm_shrink);
+}
+
+int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
+{
+	int ret = -ENOMEM;
+
+	WARN_ON(_manager);
+
+	printk(KERN_INFO TTM_PFX "Initializing DMA pool allocator.\n");
+
+	_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
+	if (!_manager)
+		goto err_manager;
+
+	mutex_init(&_manager->lock);
+	INIT_LIST_HEAD(&_manager->pools);
+
+	_manager->options.max_size = max_pages;
+	_manager->options.small = SMALL_ALLOCATION;
+	_manager->options.alloc_size = NUM_PAGES_TO_ALLOC;
+
+	/* This takes care of auto-freeing the _manager */
+	ret = kobject_init_and_add(&_manager->kobj, &ttm_pool_kobj_type,
+				   &glob->kobj, "dma_pool");
+	if (unlikely(ret != 0)) {
+		kobject_put(&_manager->kobj);
+		goto err;
+	}
+	ttm_dma_pool_mm_shrink_init(_manager);
+	return 0;
+err_manager:
+	kfree(_manager);
+	_manager = NULL;
+err:
+	return ret;
+}
+
+void ttm_dma_page_alloc_fini(void)
+{
+	struct device_pools *p, *t;
+
+	printk(KERN_INFO TTM_PFX "Finalizing DMA pool allocator.\n");
+	ttm_dma_pool_mm_shrink_fini(_manager);
+
+	list_for_each_entry_safe_reverse(p, t, &_manager->pools, pools) {
+		dev_dbg(p->dev, "(%s:%d) Freeing.\n", p->pool->name,
+			current->pid);
+		WARN_ON(devres_destroy(p->dev, ttm_dma_pool_release,
+			ttm_dma_pool_match, p->pool));
+		ttm_dma_free_pool(p->dev, p->pool->type);
+	}
+	kobject_put(&_manager->kobj);
+	_manager = NULL;
+}
+
+int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
+{
+	struct device_pools *p;
+	struct dma_pool *pool = NULL;
+	char *h[] = {"pool", "refills", "pages freed", "inuse", "available",
+		     "name", "virt", "busaddr"};
+
+	if (!_manager) {
+		seq_printf(m, "No pool allocator running.\n");
+		return 0;
+	}
+	seq_printf(m, "%13s %12s %13s %8s %8s %8s\n",
+		   h[0], h[1], h[2], h[3], h[4], h[5]);
+	mutex_lock(&_manager->lock);
+	list_for_each_entry(p, &_manager->pools, pools) {
+		struct device *dev = p->dev;
+		if (!dev)
+			continue;
+		pool = p->pool;
+		seq_printf(m, "%13s %12ld %13ld %8d %8d %8s\n",
+				pool->name, pool->nrefills,
+				pool->nfrees, pool->npages_in_use,
+				pool->npages_free,
+				pool->dev_name);
+	}
+	mutex_unlock(&_manager->lock);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ttm_dma_page_alloc_debugfs);
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index f9cc548d6d98c..920d12e66e55b 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -43,8 +43,6 @@
 #include "ttm/ttm_placement.h"
 #include "ttm/ttm_page_alloc.h"
 
-static int ttm_tt_swapin(struct ttm_tt *ttm);
-
 /**
  * Allocates storage for pointers to the pages that back the ttm.
  */
@@ -63,120 +61,6 @@ static void ttm_tt_free_page_directory(struct ttm_tt *ttm)
 	ttm->dma_address = NULL;
 }
 
-static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
-{
-	int write;
-	int dirty;
-	struct page *page;
-	int i;
-	struct ttm_backend *be = ttm->be;
-
-	BUG_ON(!(ttm->page_flags & TTM_PAGE_FLAG_USER));
-	write = ((ttm->page_flags & TTM_PAGE_FLAG_WRITE) != 0);
-	dirty = ((ttm->page_flags & TTM_PAGE_FLAG_USER_DIRTY) != 0);
-
-	if (be)
-		be->func->clear(be);
-
-	for (i = 0; i < ttm->num_pages; ++i) {
-		page = ttm->pages[i];
-		if (page == NULL)
-			continue;
-
-		if (page == ttm->dummy_read_page) {
-			BUG_ON(write);
-			continue;
-		}
-
-		if (write && dirty && !PageReserved(page))
-			set_page_dirty_lock(page);
-
-		ttm->pages[i] = NULL;
-		ttm_mem_global_free(ttm->glob->mem_glob, PAGE_SIZE);
-		put_page(page);
-	}
-	ttm->state = tt_unpopulated;
-	ttm->first_himem_page = ttm->num_pages;
-	ttm->last_lomem_page = -1;
-}
-
-static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
-{
-	struct page *p;
-	struct list_head h;
-	struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
-	int ret;
-
-	while (NULL == (p = ttm->pages[index])) {
-
-		INIT_LIST_HEAD(&h);
-
-		ret = ttm_get_pages(&h, ttm->page_flags, ttm->caching_state, 1,
-				    &ttm->dma_address[index]);
-
-		if (ret != 0)
-			return NULL;
-
-		p = list_first_entry(&h, struct page, lru);
-
-		ret = ttm_mem_global_alloc_page(mem_glob, p, false, false);
-		if (unlikely(ret != 0))
-			goto out_err;
-
-		if (PageHighMem(p))
-			ttm->pages[--ttm->first_himem_page] = p;
-		else
-			ttm->pages[++ttm->last_lomem_page] = p;
-	}
-	return p;
-out_err:
-	put_page(p);
-	return NULL;
-}
-
-struct page *ttm_tt_get_page(struct ttm_tt *ttm, int index)
-{
-	int ret;
-
-	if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
-		ret = ttm_tt_swapin(ttm);
-		if (unlikely(ret != 0))
-			return NULL;
-	}
-	return __ttm_tt_get_page(ttm, index);
-}
-
-int ttm_tt_populate(struct ttm_tt *ttm)
-{
-	struct page *page;
-	unsigned long i;
-	struct ttm_backend *be;
-	int ret;
-
-	if (ttm->state != tt_unpopulated)
-		return 0;
-
-	if (unlikely(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)) {
-		ret = ttm_tt_swapin(ttm);
-		if (unlikely(ret != 0))
-			return ret;
-	}
-
-	be = ttm->be;
-
-	for (i = 0; i < ttm->num_pages; ++i) {
-		page = __ttm_tt_get_page(ttm, i);
-		if (!page)
-			return -ENOMEM;
-	}
-
-	be->func->populate(be, ttm->num_pages, ttm->pages,
-			   ttm->dummy_read_page, ttm->dma_address);
-	ttm->state = tt_unbound;
-	return 0;
-}
-EXPORT_SYMBOL(ttm_tt_populate);
-
 #ifdef CONFIG_X86
 static inline int ttm_tt_set_page_caching(struct page *p,
 					  enum ttm_caching_state c_old,
@@ -278,59 +162,13 @@ int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement)
 }
 EXPORT_SYMBOL(ttm_tt_set_placement_caching);
 
-static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
-{
-	int i;
-	unsigned count = 0;
-	struct list_head h;
-	struct page *cur_page;
-	struct ttm_backend *be = ttm->be;
-
-	INIT_LIST_HEAD(&h);
-
-	if (be)
-		be->func->clear(be);
-	for (i = 0; i < ttm->num_pages; ++i) {
-
-		cur_page = ttm->pages[i];
-		ttm->pages[i] = NULL;
-		if (cur_page) {
-			if (page_count(cur_page) != 1)
-				printk(KERN_ERR TTM_PFX
-				       "Erroneous page count. "
-				       "Leaking pages.\n");
-			ttm_mem_global_free_page(ttm->glob->mem_glob,
-						 cur_page);
-			list_add(&cur_page->lru, &h);
-			count++;
-		}
-	}
-	ttm_put_pages(&h, count, ttm->page_flags, ttm->caching_state,
-		      ttm->dma_address);
-	ttm->state = tt_unpopulated;
-	ttm->first_himem_page = ttm->num_pages;
-	ttm->last_lomem_page = -1;
-}
-
 void ttm_tt_destroy(struct ttm_tt *ttm)
 {
-	struct ttm_backend *be;
-
 	if (unlikely(ttm == NULL))
 		return;
 
-	be = ttm->be;
-	if (likely(be != NULL)) {
-		be->func->destroy(be);
-		ttm->be = NULL;
-	}
-
 	if (likely(ttm->pages != NULL)) {
-		if (ttm->page_flags & TTM_PAGE_FLAG_USER)
-			ttm_tt_free_user_pages(ttm);
-		else
-			ttm_tt_free_alloced_pages(ttm);
-
+		ttm->bdev->driver->ttm_tt_unpopulate(ttm);
 		ttm_tt_free_page_directory(ttm);
 	}
 
@@ -338,93 +176,38 @@ void ttm_tt_destroy(struct ttm_tt *ttm)
 	    ttm->swap_storage)
 		fput(ttm->swap_storage);
 
-	kfree(ttm);
-}
-
-int ttm_tt_set_user(struct ttm_tt *ttm,
-		    struct task_struct *tsk,
-		    unsigned long start, unsigned long num_pages)
-{
-	struct mm_struct *mm = tsk->mm;
-	int ret;
-	int write = (ttm->page_flags & TTM_PAGE_FLAG_WRITE) != 0;
-	struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
-
-	BUG_ON(num_pages != ttm->num_pages);
-	BUG_ON((ttm->page_flags & TTM_PAGE_FLAG_USER) == 0);
-
-	/**
-	 * Account user pages as lowmem pages for now.
-	 */
-
-	ret = ttm_mem_global_alloc(mem_glob, num_pages * PAGE_SIZE,
-				   false, false);
-	if (unlikely(ret != 0))
-		return ret;
-
-	down_read(&mm->mmap_sem);
-	ret = get_user_pages(tsk, mm, start, num_pages,
-			     write, 0, ttm->pages, NULL);
-	up_read(&mm->mmap_sem);
-
-	if (ret != num_pages && write) {
-		ttm_tt_free_user_pages(ttm);
-		ttm_mem_global_free(mem_glob, num_pages * PAGE_SIZE);
-		return -ENOMEM;
-	}
-
-	ttm->tsk = tsk;
-	ttm->start = start;
-	ttm->state = tt_unbound;
-
-	return 0;
+	ttm->swap_storage = NULL;
+	ttm->func->destroy(ttm);
 }
 
-struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
-			     uint32_t page_flags, struct page *dummy_read_page)
+int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
+		unsigned long size, uint32_t page_flags,
+		struct page *dummy_read_page)
 {
-	struct ttm_bo_driver *bo_driver = bdev->driver;
-	struct ttm_tt *ttm;
-
-	if (!bo_driver)
-		return NULL;
-
-	ttm = kzalloc(sizeof(*ttm), GFP_KERNEL);
-	if (!ttm)
-		return NULL;
-
+	ttm->bdev = bdev;
 	ttm->glob = bdev->glob;
 	ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
-	ttm->first_himem_page = ttm->num_pages;
-	ttm->last_lomem_page = -1;
 	ttm->caching_state = tt_cached;
 	ttm->page_flags = page_flags;
-
 	ttm->dummy_read_page = dummy_read_page;
+	ttm->state = tt_unpopulated;
 
 	ttm_tt_alloc_page_directory(ttm);
-	if (!ttm->pages) {
+	if (!ttm->pages || !ttm->dma_address) {
 		ttm_tt_destroy(ttm);
 		printk(KERN_ERR TTM_PFX "Failed allocating page table\n");
-		return NULL;
-	}
-	ttm->be = bo_driver->create_ttm_backend_entry(bdev);
-	if (!ttm->be) {
-		ttm_tt_destroy(ttm);
-		printk(KERN_ERR TTM_PFX "Failed creating ttm backend entry\n");
-		return NULL;
+		return -ENOMEM;
 	}
-	ttm->state = tt_unpopulated;
-	return ttm;
+	return 0;
 }
+EXPORT_SYMBOL(ttm_tt_init);
 
 void ttm_tt_unbind(struct ttm_tt *ttm)
 {
 	int ret;
-	struct ttm_backend *be = ttm->be;
 
 	if (ttm->state == tt_bound) {
-		ret = be->func->unbind(be);
+		ret = ttm->func->unbind(ttm);
 		BUG_ON(ret);
 		ttm->state = tt_unbound;
 	}
@@ -433,7 +216,6 @@ void ttm_tt_unbind(struct ttm_tt *ttm)
 int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
 {
 	int ret = 0;
-	struct ttm_backend *be;
 
 	if (!ttm)
 		return -EINVAL;
@@ -441,25 +223,21 @@ int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
 	if (ttm->state == tt_bound)
 		return 0;
 
-	be = ttm->be;
-
-	ret = ttm_tt_populate(ttm);
+	ret = ttm->bdev->driver->ttm_tt_populate(ttm);
 	if (ret)
 		return ret;
 
-	ret = be->func->bind(be, bo_mem);
+	ret = ttm->func->bind(ttm, bo_mem);
 	if (unlikely(ret != 0))
 		return ret;
 
 	ttm->state = tt_bound;
 
-	if (ttm->page_flags & TTM_PAGE_FLAG_USER)
-		ttm->page_flags |= TTM_PAGE_FLAG_USER_DIRTY;
 	return 0;
 }
 EXPORT_SYMBOL(ttm_tt_bind);
 
-static int ttm_tt_swapin(struct ttm_tt *ttm)
+int ttm_tt_swapin(struct ttm_tt *ttm)
 {
 	struct address_space *swap_space;
 	struct file *swap_storage;
@@ -470,16 +248,6 @@ static int ttm_tt_swapin(struct ttm_tt *ttm)
 	int i;
 	int ret = -ENOMEM;
 
-	if (ttm->page_flags & TTM_PAGE_FLAG_USER) {
-		ret = ttm_tt_set_user(ttm, ttm->tsk, ttm->start,
-				      ttm->num_pages);
-		if (unlikely(ret != 0))
-			return ret;
-
-		ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
-		return 0;
-	}
-
 	swap_storage = ttm->swap_storage;
 	BUG_ON(swap_storage == NULL);
 
@@ -491,7 +259,7 @@ static int ttm_tt_swapin(struct ttm_tt *ttm)
 			ret = PTR_ERR(from_page);
 			goto out_err;
 		}
-		to_page = __ttm_tt_get_page(ttm, i);
+		to_page = ttm->pages[i];
 		if (unlikely(to_page == NULL))
 			goto out_err;
 
@@ -512,7 +280,6 @@ static int ttm_tt_swapin(struct ttm_tt *ttm)
 
 	return 0;
 out_err:
-	ttm_tt_free_alloced_pages(ttm);
 	return ret;
 }
 
@@ -530,18 +297,6 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
 	BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
 	BUG_ON(ttm->caching_state != tt_cached);
 
-	/*
-	 * For user buffers, just unpin the pages, as there should be
-	 * vma references.
-	 */
-
-	if (ttm->page_flags & TTM_PAGE_FLAG_USER) {
-		ttm_tt_free_user_pages(ttm);
-		ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
-		ttm->swap_storage = NULL;
-		return 0;
-	}
-
 	if (!persistent_swap_storage) {
 		swap_storage = shmem_file_setup("ttm swap",
 						ttm->num_pages << PAGE_SHIFT,
@@ -576,7 +331,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
 		page_cache_release(to_page);
 	}
 
-	ttm_tt_free_alloced_pages(ttm);
+	ttm->bdev->driver->ttm_tt_unpopulate(ttm);
 	ttm->swap_storage = swap_storage;
 	ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
 	if (persistent_swap_storage)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
index 5a72ed9082321..383993b845b13 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
@@ -28,6 +28,7 @@
 #include "vmwgfx_drv.h"
 #include "ttm/ttm_bo_driver.h"
 #include "ttm/ttm_placement.h"
+#include "ttm/ttm_page_alloc.h"
 
 static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
 	TTM_PL_FLAG_CACHED;
@@ -139,85 +140,61 @@ struct ttm_placement vmw_srf_placement = {
 	.busy_placement = gmr_vram_placement_flags
 };
 
-struct vmw_ttm_backend {
-	struct ttm_backend backend;
-	struct page **pages;
-	unsigned long num_pages;
+struct vmw_ttm_tt {
+	struct ttm_tt ttm;
 	struct vmw_private *dev_priv;
 	int gmr_id;
 };
 
-static int vmw_ttm_populate(struct ttm_backend *backend,
-			    unsigned long num_pages, struct page **pages,
-			    struct page *dummy_read_page,
-			    dma_addr_t *dma_addrs)
+static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
 {
-	struct vmw_ttm_backend *vmw_be =
-	    container_of(backend, struct vmw_ttm_backend, backend);
-
-	vmw_be->pages = pages;
-	vmw_be->num_pages = num_pages;
-
-	return 0;
-}
-
-static int vmw_ttm_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
-{
-	struct vmw_ttm_backend *vmw_be =
-	    container_of(backend, struct vmw_ttm_backend, backend);
+	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
 
 	vmw_be->gmr_id = bo_mem->start;
 
-	return vmw_gmr_bind(vmw_be->dev_priv, vmw_be->pages,
-			    vmw_be->num_pages, vmw_be->gmr_id);
+	return vmw_gmr_bind(vmw_be->dev_priv, ttm->pages,
+			    ttm->num_pages, vmw_be->gmr_id);
 }
 
-static int vmw_ttm_unbind(struct ttm_backend *backend)
+static int vmw_ttm_unbind(struct ttm_tt *ttm)
 {
-	struct vmw_ttm_backend *vmw_be =
-	    container_of(backend, struct vmw_ttm_backend, backend);
+	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
 
 	vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
 	return 0;
 }
 
-static void vmw_ttm_clear(struct ttm_backend *backend)
+static void vmw_ttm_destroy(struct ttm_tt *ttm)
 {
-	struct vmw_ttm_backend *vmw_be =
-		container_of(backend, struct vmw_ttm_backend, backend);
-
-	vmw_be->pages = NULL;
-	vmw_be->num_pages = 0;
-}
-
-static void vmw_ttm_destroy(struct ttm_backend *backend)
-{
-	struct vmw_ttm_backend *vmw_be =
-	    container_of(backend, struct vmw_ttm_backend, backend);
+	struct vmw_ttm_tt *vmw_be = container_of(ttm, struct vmw_ttm_tt, ttm);
 
 	kfree(vmw_be);
 }
 
 static struct ttm_backend_func vmw_ttm_func = {
-	.populate = vmw_ttm_populate,
-	.clear = vmw_ttm_clear,
 	.bind = vmw_ttm_bind,
 	.unbind = vmw_ttm_unbind,
 	.destroy = vmw_ttm_destroy,
 };
 
-struct ttm_backend *vmw_ttm_backend_init(struct ttm_bo_device *bdev)
+struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
+				 unsigned long size, uint32_t page_flags,
+				 struct page *dummy_read_page)
 {
-	struct vmw_ttm_backend *vmw_be;
+	struct vmw_ttm_tt *vmw_be;
 
 	vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
 	if (!vmw_be)
 		return NULL;
 
-	vmw_be->backend.func = &vmw_ttm_func;
+	vmw_be->ttm.func = &vmw_ttm_func;
 	vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
 
-	return &vmw_be->backend;
+	if (ttm_tt_init(&vmw_be->ttm, bdev, size, page_flags, dummy_read_page)) {
+		return NULL;
+	}
+
+	return &vmw_be->ttm;
 }
 
 int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
@@ -357,7 +334,9 @@ static int vmw_sync_obj_wait(void *sync_obj, void *sync_arg,
 }
 
 struct ttm_bo_driver vmw_bo_driver = {
-	.create_ttm_backend_entry = vmw_ttm_backend_init,
+	.ttm_tt_create = &vmw_ttm_tt_create,
+	.ttm_tt_populate = &ttm_page_alloc_ttm_tt_populate,
+	.ttm_tt_unpopulate = &ttm_page_alloc_ttm_tt_unpopulate,
 	.invalidate_caches = vmw_invalidate_caches,
 	.init_mem_type = vmw_init_mem_type,
 	.evict_flags = vmw_evict_flags,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
index 15fb26088d68e..8fd1e6bcb3b38 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
@@ -503,8 +503,7 @@ int vmw_fence_create(struct vmw_fence_manager *fman,
 	struct vmw_fence_obj *fence;
 	int ret;
 
-	ret = ttm_mem_global_alloc(mem_glob, fman->fence_size,
-				   false, false);
+	ret = ttm_mem_global_alloc(mem_glob, fman->fence_size, false);
 	if (unlikely(ret != 0))
 		return ret;
 
@@ -573,8 +572,7 @@ int vmw_user_fence_create(struct drm_file *file_priv,
 	 * be created by a user-space request.
 	 */
 
-	ret = ttm_mem_global_alloc(mem_glob, fman->user_fence_size,
-				   false, false);
+	ret = ttm_mem_global_alloc(mem_glob, fman->user_fence_size, false);
 	if (unlikely(ret != 0))
 		return ret;
 
@@ -966,7 +964,7 @@ int vmw_event_fence_action_create(struct drm_file *file_priv,
 	 * event size itself.
 	 */
 
-	ret = ttm_mem_global_alloc(mem_glob, size, false, interruptible);
+	ret = ttm_mem_global_alloc(mem_glob, size, false);
 	if (unlikely(ret != 0))
 		return ret;
 
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
index 86c5e4cceb31e..3c43ac046d5fd 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -430,7 +430,7 @@ int vmw_context_define_ioctl(struct drm_device *dev, void *data,
 
 	ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 				   vmw_user_context_size,
-				   false, true);
+				   false);
 	if (unlikely(ret != 0)) {
 		if (ret != -ERESTARTSYS)
 			DRM_ERROR("Out of graphics memory for context"
@@ -1298,7 +1298,7 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
 		return ret;
 
 	ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
-				   size, false, true);
+				   size, false);
 	if (unlikely(ret != 0)) {
 		if (ret != -ERESTARTSYS)
 			DRM_ERROR("Out of graphics memory for surface"
@@ -1560,7 +1560,7 @@ int vmw_dmabuf_init(struct vmw_private *dev_priv,
 	    vmw_dmabuf_acc_size(bdev->glob,
 				(size + PAGE_SIZE - 1) >> PAGE_SHIFT);
 
-	ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
+	ret = ttm_mem_global_alloc(mem_glob, acc_size, false);
 	if (unlikely(ret != 0)) {
 		/* we must free the bo here as
 		 * ttm_buffer_object_init does so as well */
@@ -1851,7 +1851,7 @@ int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
 
 	ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 				   vmw_user_stream_size,
-				   false, true);
+				   false);
 	if (unlikely(ret != 0)) {
 		if (ret != -ERESTARTSYS)
 			DRM_ERROR("Out of graphics memory for stream"
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 8e964b91c447b..4864e5d72e72c 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -153,7 +153,7 @@ void __init xen_swiotlb_init(int verbose)
 	char *m = NULL;
 	unsigned int repeat = 3;
 
-	nr_tbl = swioltb_nr_tbl();
+	nr_tbl = swiotlb_nr_tbl();
 	if (nr_tbl)
 		xen_io_tlb_nslabs = nr_tbl;
 	else {
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 42e3469851864..8d95a42cf21ee 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -122,17 +122,12 @@ struct ttm_mem_reg {
  * be mmapped by user space. Each of these bos occupy a slot in the
  * device address space, that can be used for normal vm operations.
  *
- * @ttm_bo_type_user: These are user-space memory areas that are made
- * available to the GPU by mapping the buffer pages into the GPU aperture
- * space. These buffers cannot be mmaped from the device address space.
- *
  * @ttm_bo_type_kernel: These buffers are like ttm_bo_type_device buffers,
  * but they cannot be accessed from user-space. For kernel-only use.
  */
 
 enum ttm_bo_type {
 	ttm_bo_type_device,
-	ttm_bo_type_user,
 	ttm_bo_type_kernel
 };
 
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 94eb1434316e5..beef9abaaefdf 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -43,36 +43,9 @@ struct ttm_backend;
 
 struct ttm_backend_func {
 	/**
-	 * struct ttm_backend_func member populate
-	 *
-	 * @backend: Pointer to a struct ttm_backend.
-	 * @num_pages: Number of pages to populate.
-	 * @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,
-			 dma_addr_t *dma_addrs);
-	/**
-	 * struct ttm_backend_func member clear
-	 *
-	 * @backend: Pointer to a struct ttm_backend.
-	 *
-	 * This is an "unpopulate" function. Release all resources
-	 * allocated with populate.
-	 */
-	void (*clear) (struct ttm_backend *backend);
-
-	/**
 	 * struct ttm_backend_func member bind
 	 *
-	 * @backend: Pointer to a struct ttm_backend.
+	 * @ttm: Pointer to a struct ttm_tt.
 	 * @bo_mem: Pointer to a struct ttm_mem_reg describing the
 	 * memory type and location for binding.
 	 *
@@ -80,46 +53,29 @@ struct ttm_backend_func {
 	 * indicated by @bo_mem. This function should be able to handle
 	 * differences between aperture and system page sizes.
 	 */
-	int (*bind) (struct ttm_backend *backend, struct ttm_mem_reg *bo_mem);
+	int (*bind) (struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
 
 	/**
 	 * struct ttm_backend_func member unbind
 	 *
-	 * @backend: Pointer to a struct ttm_backend.
+	 * @ttm: Pointer to a struct ttm_tt.
 	 *
 	 * Unbind previously bound backend pages. This function should be
 	 * able to handle differences between aperture and system page sizes.
 	 */
-	int (*unbind) (struct ttm_backend *backend);
+	int (*unbind) (struct ttm_tt *ttm);
 
 	/**
 	 * struct ttm_backend_func member destroy
 	 *
-	 * @backend: Pointer to a struct ttm_backend.
+	 * @ttm: Pointer to a struct ttm_tt.
 	 *
-	 * Destroy the backend.
+	 * Destroy the backend. This will be call back from ttm_tt_destroy so
+	 * don't call ttm_tt_destroy from the callback or infinite loop.
 	 */
-	void (*destroy) (struct ttm_backend *backend);
-};
-
-/**
- * struct ttm_backend
- *
- * @bdev: Pointer to a struct ttm_bo_device.
- * @flags: For driver use.
- * @func: Pointer to a struct ttm_backend_func that describes
- * the backend methods.
- *
- */
-
-struct ttm_backend {
-	struct ttm_bo_device *bdev;
-	uint32_t flags;
-	struct ttm_backend_func *func;
+	void (*destroy) (struct ttm_tt *ttm);
 };
 
-#define TTM_PAGE_FLAG_USER            (1 << 1)
-#define TTM_PAGE_FLAG_USER_DIRTY      (1 << 2)
 #define TTM_PAGE_FLAG_WRITE           (1 << 3)
 #define TTM_PAGE_FLAG_SWAPPED         (1 << 4)
 #define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5)
@@ -135,23 +91,20 @@ enum ttm_caching_state {
 /**
  * struct ttm_tt
  *
+ * @bdev: Pointer to a struct ttm_bo_device.
+ * @func: Pointer to a struct ttm_backend_func that describes
+ * the backend methods.
  * @dummy_read_page: Page to map where the ttm_tt page array contains a NULL
  * pointer.
  * @pages: Array of pages backing the data.
- * @first_himem_page: Himem pages are put last in the page array, which
- * enables us to run caching attribute changes on only the first part
- * of the page array containing lomem pages. This is the index of the
- * first himem page.
- * @last_lomem_page: Index of the last lomem page in the page array.
  * @num_pages: Number of pages in the page array.
  * @bdev: Pointer to the current struct ttm_bo_device.
  * @be: Pointer to the ttm backend.
- * @tsk: The task for user ttm.
- * @start: virtual address for user ttm.
  * @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)
+ * @alloc_list: used by some page allocation backend
  *
  * This is a structure holding the pages, caching- and aperture binding
  * status for a buffer object that isn't backed by fixed (VRAM / AGP)
@@ -159,16 +112,14 @@ enum ttm_caching_state {
  */
 
 struct ttm_tt {
+	struct ttm_bo_device *bdev;
+	struct ttm_backend_func *func;
 	struct page *dummy_read_page;
 	struct page **pages;
-	long first_himem_page;
-	long last_lomem_page;
 	uint32_t page_flags;
 	unsigned long num_pages;
 	struct ttm_bo_global *glob;
 	struct ttm_backend *be;
-	struct task_struct *tsk;
-	unsigned long start;
 	struct file *swap_storage;
 	enum ttm_caching_state caching_state;
 	enum {
@@ -177,6 +128,7 @@ struct ttm_tt {
 		tt_unpopulated,
 	} state;
 	dma_addr_t *dma_address;
+	struct list_head alloc_list;
 };
 
 #define TTM_MEMTYPE_FLAG_FIXED         (1 << 0)	/* Fixed (on-card) PCI memory */
@@ -351,15 +303,42 @@ struct ttm_mem_type_manager {
 
 struct ttm_bo_driver {
 	/**
-	 * struct ttm_bo_driver member create_ttm_backend_entry
+	 * ttm_tt_create
+	 *
+	 * @bdev: pointer to a struct ttm_bo_device:
+	 * @size: Size of the data needed backing.
+	 * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+	 * @dummy_read_page: See struct ttm_bo_device.
+	 *
+	 * Create a struct ttm_tt to back data with system memory pages.
+	 * No pages are actually allocated.
+	 * Returns:
+	 * NULL: Out of memory.
+	 */
+	struct ttm_tt *(*ttm_tt_create)(struct ttm_bo_device *bdev,
+					unsigned long size,
+					uint32_t page_flags,
+					struct page *dummy_read_page);
+
+	/**
+	 * ttm_tt_populate
 	 *
-	 * @bdev: The buffer object device.
+	 * @ttm: The struct ttm_tt to contain the backing pages.
 	 *
-	 * Create a driver specific struct ttm_backend.
+	 * Allocate all backing pages
+	 * Returns:
+	 * -ENOMEM: Out of memory.
 	 */
+	int (*ttm_tt_populate)(struct ttm_tt *ttm);
 
-	struct ttm_backend *(*create_ttm_backend_entry)
-	 (struct ttm_bo_device *bdev);
+	/**
+	 * ttm_tt_unpopulate
+	 *
+	 * @ttm: The struct ttm_tt to contain the backing pages.
+	 *
+	 * Free all backing page
+	 */
+	void (*ttm_tt_unpopulate)(struct ttm_tt *ttm);
 
 	/**
 	 * struct ttm_bo_driver member invalidate_caches
@@ -600,8 +579,9 @@ ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
 }
 
 /**
- * ttm_tt_create
+ * ttm_tt_init
  *
+ * @ttm: The struct ttm_tt.
  * @bdev: pointer to a struct ttm_bo_device:
  * @size: Size of the data needed backing.
  * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
@@ -612,28 +592,9 @@ ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
  * Returns:
  * NULL: Out of memory.
  */
-extern struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev,
-				    unsigned long size,
-				    uint32_t page_flags,
-				    struct page *dummy_read_page);
-
-/**
- * ttm_tt_set_user:
- *
- * @ttm: The struct ttm_tt to populate.
- * @tsk: A struct task_struct for which @start is a valid user-space address.
- * @start: A valid user-space address.
- * @num_pages: Size in pages of the user memory area.
- *
- * Populate a struct ttm_tt with a user-space memory area after first pinning
- * the pages backing it.
- * Returns:
- * !0: Error.
- */
-
-extern int ttm_tt_set_user(struct ttm_tt *ttm,
-			   struct task_struct *tsk,
-			   unsigned long start, unsigned long num_pages);
+extern int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
+			unsigned long size, uint32_t page_flags,
+			struct page *dummy_read_page);
 
 /**
  * ttm_ttm_bind:
@@ -646,20 +607,11 @@ extern int ttm_tt_set_user(struct ttm_tt *ttm,
 extern int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem);
 
 /**
- * ttm_tt_populate:
- *
- * @ttm: The struct ttm_tt to contain the backing pages.
- *
- * Add backing pages to all of @ttm
- */
-extern int ttm_tt_populate(struct ttm_tt *ttm);
-
-/**
  * ttm_ttm_destroy:
  *
  * @ttm: The struct ttm_tt.
  *
- * Unbind, unpopulate and destroy a struct ttm_tt.
+ * Unbind, unpopulate and destroy common struct ttm_tt.
  */
 extern void ttm_tt_destroy(struct ttm_tt *ttm);
 
@@ -673,19 +625,13 @@ extern void ttm_tt_destroy(struct ttm_tt *ttm);
 extern void ttm_tt_unbind(struct ttm_tt *ttm);
 
 /**
- * ttm_ttm_destroy:
+ * ttm_tt_swapin:
  *
  * @ttm: The struct ttm_tt.
- * @index: Index of the desired page.
- *
- * Return a pointer to the struct page backing @ttm at page
- * index @index. If the page is unpopulated, one will be allocated to
- * populate that index.
  *
- * Returns:
- * NULL on OOM.
+ * Swap in a previously swap out ttm_tt.
  */
-extern struct page *ttm_tt_get_page(struct ttm_tt *ttm, int index);
+extern int ttm_tt_swapin(struct ttm_tt *ttm);
 
 /**
  * ttm_tt_cache_flush:
@@ -1046,17 +992,23 @@ extern const struct ttm_mem_type_manager_func ttm_bo_manager_func;
 #include <linux/agp_backend.h>
 
 /**
- * ttm_agp_backend_init
+ * ttm_agp_tt_create
  *
  * @bdev: Pointer to a struct ttm_bo_device.
  * @bridge: The agp bridge this device is sitting on.
+ * @size: Size of the data needed backing.
+ * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+ * @dummy_read_page: See struct ttm_bo_device.
+ *
  *
  * Create a TTM backend that uses the indicated AGP bridge as an aperture
  * for TT memory. This function uses the linux agpgart interface to
  * bind and unbind memory backing a ttm_tt.
  */
-extern struct ttm_backend *ttm_agp_backend_init(struct ttm_bo_device *bdev,
-						struct agp_bridge_data *bridge);
+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);
 #endif
 
 #endif
diff --git a/include/drm/ttm/ttm_memory.h b/include/drm/ttm/ttm_memory.h
index 26c1f78d136f4..c0c732d42cbcd 100644
--- a/include/drm/ttm/ttm_memory.h
+++ b/include/drm/ttm/ttm_memory.h
@@ -81,14 +81,13 @@ struct ttm_mem_global {
 	struct work_struct work;
 	wait_queue_head_t queue;
 	spinlock_t lock;
-	struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES];
-	unsigned int num_zones;
-	struct ttm_mem_zone *zone_kernel;
-#ifdef CONFIG_HIGHMEM
-	struct ttm_mem_zone *zone_highmem;
-#else
-	struct ttm_mem_zone *zone_dma32;
-#endif
+	unsigned long mem;
+	unsigned long max_mem;
+	unsigned long emer_mem;
+	unsigned long used_mem;
+	unsigned long used_dma32_mem;
+	unsigned long swap_limit;
+	unsigned long swap_dma32_limit;
 };
 
 /**
@@ -146,14 +145,19 @@ static inline void ttm_mem_unregister_shrink(struct ttm_mem_global *glob,
 
 extern int ttm_mem_global_init(struct ttm_mem_global *glob);
 extern void ttm_mem_global_release(struct ttm_mem_global *glob);
-extern int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
-				bool no_wait, bool interruptible);
+extern int ttm_mem_global_alloc(struct ttm_mem_global *glob,
+				uint64_t memory,
+				bool no_wait);
 extern void ttm_mem_global_free(struct ttm_mem_global *glob,
 				uint64_t amount);
-extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
-				     struct page *page,
-				     bool no_wait, bool interruptible);
-extern void ttm_mem_global_free_page(struct ttm_mem_global *glob,
-				     struct page *page);
+extern int ttm_mem_global_alloc_pages(struct ttm_mem_global *glob,
+				      unsigned npages,
+				      bool no_wait);
+extern void ttm_mem_global_free_pages(struct ttm_mem_global *glob,
+				      struct page **pages, unsigned npages);
+extern void ttm_mem_global_account_pages(struct ttm_mem_global *glob,
+					 struct page **pages,
+					 unsigned npages);
 extern size_t ttm_round_pot(size_t size);
+
 #endif
diff --git a/include/drm/ttm/ttm_page_alloc.h b/include/drm/ttm/ttm_page_alloc.h
index 129de12353f19..f127635fdb262 100644
--- a/include/drm/ttm/ttm_page_alloc.h
+++ b/include/drm/ttm/ttm_page_alloc.h
@@ -32,29 +32,28 @@
 /**
  * Get count number of pages from pool to pages list.
  *
- * @pages: head of empty linked list where pages are filled.
+ * @pages: array of pages ptr
+ * @npages: number of pages to allocate.
  * @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).
  */
-int ttm_get_pages(struct list_head *pages,
+int ttm_get_pages(struct page **pages,
+		  unsigned npages,
 		  int flags,
 		  enum ttm_caching_state cstate,
-		  unsigned count,
 		  dma_addr_t *dma_address);
 /**
  * Put linked list of pages to pool.
  *
- * @pages: list of pages to free.
- * @page_count: number of pages in the list. Zero can be passed for unknown
- * count.
+ * @pages: array of pages ptr
+ * @npages: number of pages to free.
  * @flags: ttm flags for page allocation.
  * @cstate: ttm caching state.
  * @dma_address: The DMA (bus) address of pages (if TTM_PAGE_FLAG_DMA32 set).
  */
-void ttm_put_pages(struct list_head *pages,
-		   unsigned page_count,
+void ttm_put_pages(struct page **pages,
+		   unsigned npages,
 		   int flags,
 		   enum ttm_caching_state cstate,
 		   dma_addr_t *dma_address);
@@ -68,7 +67,61 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
 void ttm_page_alloc_fini(void);
 
 /**
+ * ttm_page_alloc_ttm_tt_populate:
+ *
+ * @ttm: The struct ttm_tt to contain the backing pages.
+ *
+ * Add backing pages to all of @ttm
+ */
+extern int ttm_page_alloc_ttm_tt_populate(struct ttm_tt *ttm);
+
+/**
+ * ttm_page_alloc_ttm_tt_unpopulate:
+ *
+ * @ttm: The struct ttm_tt which to free backing pages.
+ *
+ * Free all pages of @ttm
+ */
+extern void ttm_page_alloc_ttm_tt_unpopulate(struct ttm_tt *ttm);
+
+/**
  * Output the state of pools to debugfs file
  */
 extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
+
+
+#ifdef CONFIG_SWIOTLB
+/**
+ * Initialize pool allocator.
+ */
+int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
+
+/**
+ * Free pool allocator.
+ */
+void ttm_dma_page_alloc_fini(void);
+
+/**
+ * Output the state of pools to debugfs file
+ */
+extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
+
+int ttm_dma_populate(struct ttm_tt *ttm, struct device *dev);
+extern void ttm_dma_unpopulate(struct ttm_tt *ttm, struct device *dev);
+
+#else
+static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
+					  unsigned max_pages)
+{
+	return -ENODEV;
+}
+
+static inline void ttm_dma_page_alloc_fini(void) { return; }
+
+static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
+{
+	return 0;
+}
+#endif
+
 #endif
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 445702c60d046..e872526fdc5fb 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -24,7 +24,7 @@ extern int swiotlb_force;
 
 extern void swiotlb_init(int verbose);
 extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
-extern unsigned long swioltb_nr_tbl(void);
+extern unsigned long swiotlb_nr_tbl(void);
 
 /*
  * Enumeration for sync targets
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 99093b3961459..058935ef39752 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -110,11 +110,11 @@ setup_io_tlb_npages(char *str)
 __setup("swiotlb=", setup_io_tlb_npages);
 /* make io_tlb_overflow tunable too? */
 
-unsigned long swioltb_nr_tbl(void)
+unsigned long swiotlb_nr_tbl(void)
 {
 	return io_tlb_nslabs;
 }
-
+EXPORT_SYMBOL_GPL(swiotlb_nr_tbl);
 /* Note that this doesn't work with highmem page */
 static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
 				      volatile void *address)
@@ -321,6 +321,7 @@ void __init swiotlb_free(void)
 		free_bootmem_late(__pa(io_tlb_start),
 				  PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
 	}
+	io_tlb_nslabs = 0;
 }
 
 static int is_swiotlb_buffer(phys_addr_t paddr)