1 files changed, 174 insertions, 11 deletions

diff --git a/linux-core/ati_pcigart.c b/linux-core/ati_pcigart.c
index 40f8f8dd..3aa445e8 100644
--- a/linux-core/ati_pcigart.c
+++ b/linux-core/ati_pcigart.c
@@ -61,8 +61,28 @@ static __inline__ void gart_insert_page_into_table(struct drm_ati_pcigart_info *
 	*pci_gart = cpu_to_le32(page_base);
 }
 
-static int drm_ati_alloc_pcigart_table(struct drm_device *dev,
-				       struct drm_ati_pcigart_info *gart_info)
+static __inline__ dma_addr_t gart_get_page_from_table(struct drm_ati_pcigart_info *gart_info, u32 *pci_gart)
+{
+	dma_addr_t retval;
+	switch(gart_info->gart_reg_if) {
+	case DRM_ATI_GART_IGP:
+		retval = (*pci_gart & ATI_PCIGART_PAGE_MASK);
+		retval += (((*pci_gart & 0xf0) >> 4) << 16) << 16;
+		break;
+	case DRM_ATI_GART_PCIE:
+		retval = (*pci_gart & ~0xc);
+		retval <<= 8;
+		break;
+	case DRM_ATI_GART_PCI:
+		retval = *pci_gart;
+		break;
+	}
+	
+	return retval;
+}
+
+int drm_ati_alloc_pcigart_table(struct drm_device *dev,
+				struct drm_ati_pcigart_info *gart_info)
 {
 	gart_info->table_handle = drm_pci_alloc(dev, gart_info->table_size,
 						PAGE_SIZE,
@@ -70,8 +90,10 @@ static int drm_ati_alloc_pcigart_table(struct drm_device *dev,
 	if (gart_info->table_handle == NULL)
 		return -ENOMEM;
 
+	memset(gart_info->table_handle, 0, gart_info->table_size);
 	return 0;
 }
+EXPORT_SYMBOL(drm_ati_alloc_pcigart_table);
 
 static void drm_ati_free_pcigart_table(struct drm_device *dev,
 				       struct drm_ati_pcigart_info *gart_info)
@@ -132,12 +154,8 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
 	int max_pages;
 	dma_addr_t entry_addr;
 
-	if (!entry) {
-		DRM_ERROR("no scatter/gather memory!\n");
-		goto done;
-	}
 
-	if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
+	if (gart_info->gart_table_location == DRM_ATI_GART_MAIN && gart_info->table_handle == NULL) {
 		DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
 
 		ret = drm_ati_alloc_pcigart_table(dev, gart_info);
@@ -145,14 +163,19 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
 			DRM_ERROR("cannot allocate PCI GART page!\n");
 			goto done;
 		}
+	}
 
+	if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
 		address = gart_info->table_handle->vaddr;
 		bus_address = gart_info->table_handle->busaddr;
 	} else {
 		address = gart_info->addr;
 		bus_address = gart_info->bus_addr;
-		DRM_DEBUG("PCI: Gart Table: VRAM %08X mapped at %08lX\n",
-			  bus_address, (unsigned long)address);
+	}
+
+	if (!entry) {
+		DRM_ERROR("no scatter/gather memory!\n");
+		goto done;
 	}
 
 	pci_gart = (u32 *) address;
@@ -161,8 +184,6 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
 	pages = (entry->pages <= max_pages)
 	    ? entry->pages : max_pages;
 
-	memset(pci_gart, 0, max_pages * sizeof(u32));
-
 	for (i = 0; i < pages; i++) {
 		/* we need to support large memory configurations */
 		entry->busaddr[i] = pci_map_page(dev->pdev, entry->pagelist[i],
@@ -197,3 +218,145 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
 	return ret;
 }
 EXPORT_SYMBOL(drm_ati_pcigart_init);
+
+static int ati_pcigart_needs_unbind_cache_adjust(struct drm_ttm_backend *backend)
+{
+	return ((backend->flags & DRM_BE_FLAG_BOUND_CACHED) ? 0 : 1);
+}
+
+static int ati_pcigart_populate(struct drm_ttm_backend *backend,
+				unsigned long num_pages,
+				struct page **pages,
+				struct page *dummy_read_page)
+{
+	struct ati_pcigart_ttm_backend *atipci_be =
+		container_of(backend, struct ati_pcigart_ttm_backend, backend);
+
+	atipci_be->pages = pages;
+	atipci_be->num_pages = num_pages;
+	atipci_be->populated = 1;
+	return 0;
+}
+
+static int ati_pcigart_bind_ttm(struct drm_ttm_backend *backend,
+				struct drm_bo_mem_reg *bo_mem)
+{
+	struct ati_pcigart_ttm_backend *atipci_be =
+		container_of(backend, struct ati_pcigart_ttm_backend, backend);
+        off_t j;
+	int i;
+	struct drm_ati_pcigart_info *info = atipci_be->gart_info;
+	u32 *pci_gart;
+	dma_addr_t offset = bo_mem->mm_node->start;
+	dma_addr_t page_base;
+
+	pci_gart = info->addr;
+
+        j = offset;
+        while (j < (offset + atipci_be->num_pages)) {
+		if (gart_get_page_from_table(info, pci_gart+j))
+			return -EBUSY;
+                j++;
+        }
+
+        for (i = 0, j = offset; i < atipci_be->num_pages; i++, j++) {
+		struct page *cur_page = atipci_be->pages[i];
+                /* write value */
+		page_base = page_to_phys(cur_page);
+		gart_insert_page_into_table(info, page_base, pci_gart + j);
+        }
+
+#if defined(__i386__) || defined(__x86_64__)
+	wbinvd();
+#else
+	mb();
+#endif
+
+	atipci_be->gart_flush_fn(atipci_be->dev);
+
+	atipci_be->bound = 1;
+	atipci_be->offset = offset;
+        /* need to traverse table and add entries */
+	DRM_DEBUG("\n");
+	return 0;
+}
+
+static int ati_pcigart_unbind_ttm(struct drm_ttm_backend *backend)
+{
+	struct ati_pcigart_ttm_backend *atipci_be =
+		container_of(backend, struct ati_pcigart_ttm_backend, backend);
+	struct drm_ati_pcigart_info *info = atipci_be->gart_info;	
+	unsigned long offset = atipci_be->offset;
+	int i;
+	off_t j;
+	u32 *pci_gart = info->addr;
+
+	if (atipci_be->bound != 1)
+		return -EINVAL;
+
+	for (i = 0, j = offset; i < atipci_be->num_pages; i++, j++) {
+		*(pci_gart + j) = 0;
+	}
+	atipci_be->gart_flush_fn(atipci_be->dev);
+	atipci_be->bound = 0;
+	atipci_be->offset = 0;
+	return 0;
+}
+
+static void ati_pcigart_clear_ttm(struct drm_ttm_backend *backend)
+{
+	struct ati_pcigart_ttm_backend *atipci_be =
+		container_of(backend, struct ati_pcigart_ttm_backend, backend);
+
+	DRM_DEBUG("\n");	
+	if (atipci_be->pages) {
+		backend->func->unbind(backend);
+		atipci_be->pages = NULL;
+
+	}
+	atipci_be->num_pages = 0;
+}
+
+static void ati_pcigart_destroy_ttm(struct drm_ttm_backend *backend)
+{
+	struct ati_pcigart_ttm_backend *atipci_be;
+	if (backend) {
+		DRM_DEBUG("\n");
+		atipci_be = container_of(backend, struct ati_pcigart_ttm_backend, backend);
+		if (atipci_be) {
+			if (atipci_be->pages) {
+				backend->func->clear(backend);
+			}
+			drm_ctl_free(atipci_be, sizeof(*atipci_be), DRM_MEM_TTM);
+		}
+	}
+}
+
+static struct drm_ttm_backend_func ati_pcigart_ttm_backend = 
+{
+	.needs_ub_cache_adjust = ati_pcigart_needs_unbind_cache_adjust,
+	.populate = ati_pcigart_populate,
+	.clear = ati_pcigart_clear_ttm,
+	.bind = ati_pcigart_bind_ttm,
+	.unbind = ati_pcigart_unbind_ttm,
+	.destroy =  ati_pcigart_destroy_ttm,
+};
+
+struct drm_ttm_backend *ati_pcigart_init_ttm(struct drm_device *dev, struct drm_ati_pcigart_info *info, void (*gart_flush_fn)(struct drm_device *dev))
+{
+	struct ati_pcigart_ttm_backend *atipci_be;
+
+	atipci_be = drm_ctl_calloc(1, sizeof (*atipci_be), DRM_MEM_TTM);
+	if (!atipci_be)
+		return NULL;
+	
+	atipci_be->populated = 0;
+	atipci_be->backend.func = &ati_pcigart_ttm_backend;
+//	atipci_be->backend.mem_type = DRM_BO_MEM_TT;
+	atipci_be->gart_info = info;
+	atipci_be->gart_flush_fn = gart_flush_fn;
+	atipci_be->dev = dev;
+
+	return &atipci_be->backend;
+}
+EXPORT_SYMBOL(ati_pcigart_init_ttm);