v4.19.13 snapshot.
diff --git a/drivers/gpu/drm/ati_pcigart.c b/drivers/gpu/drm/ati_pcigart.c
new file mode 100644
index 0000000..6c4d4b6
--- /dev/null
+++ b/drivers/gpu/drm/ati_pcigart.c
@@ -0,0 +1,204 @@
+/**
+ * \file ati_pcigart.c
+ * ATI PCI GART support
+ *
+ * \author Gareth Hughes <gareth@valinux.com>
+ */
+
+/*
+ * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
+ *
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * All Rights Reserved.
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT. IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS 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.
+ */
+
+#include <linux/export.h>
+#include <drm/drmP.h>
+
+#include <drm/ati_pcigart.h>
+
+# define ATI_PCIGART_PAGE_SIZE 4096 /**< PCI GART page size */
+
+static 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);
+ if (gart_info->table_handle == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void drm_ati_free_pcigart_table(struct drm_device *dev,
+ struct drm_ati_pcigart_info *gart_info)
+{
+ drm_pci_free(dev, gart_info->table_handle);
+ gart_info->table_handle = NULL;
+}
+
+int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
+{
+ struct drm_sg_mem *entry = dev->sg;
+ unsigned long pages;
+ int i;
+ int max_pages;
+
+ /* we need to support large memory configurations */
+ if (!entry) {
+ DRM_ERROR("no scatter/gather memory!\n");
+ return 0;
+ }
+
+ if (gart_info->bus_addr) {
+
+ max_pages = (gart_info->table_size / sizeof(u32));
+ pages = (entry->pages <= max_pages)
+ ? entry->pages : max_pages;
+
+ for (i = 0; i < pages; i++) {
+ if (!entry->busaddr[i])
+ break;
+ pci_unmap_page(dev->pdev, entry->busaddr[i],
+ PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+ }
+
+ if (gart_info->gart_table_location == DRM_ATI_GART_MAIN)
+ gart_info->bus_addr = 0;
+ }
+
+ if (gart_info->gart_table_location == DRM_ATI_GART_MAIN &&
+ gart_info->table_handle) {
+ drm_ati_free_pcigart_table(dev, gart_info);
+ }
+
+ return 1;
+}
+EXPORT_SYMBOL(drm_ati_pcigart_cleanup);
+
+int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
+{
+ struct drm_local_map *map = &gart_info->mapping;
+ struct drm_sg_mem *entry = dev->sg;
+ void *address = NULL;
+ unsigned long pages;
+ u32 *pci_gart = NULL, page_base, gart_idx;
+ dma_addr_t bus_address = 0;
+ int i, j, ret = 0;
+ int max_ati_pages, max_real_pages;
+
+ if (!entry) {
+ DRM_ERROR("no scatter/gather memory!\n");
+ goto done;
+ }
+
+ if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
+ DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
+
+ if (pci_set_dma_mask(dev->pdev, gart_info->table_mask)) {
+ DRM_ERROR("fail to set dma mask to 0x%Lx\n",
+ (unsigned long long)gart_info->table_mask);
+ ret = 1;
+ goto done;
+ }
+
+ ret = drm_ati_alloc_pcigart_table(dev, gart_info);
+ if (ret) {
+ DRM_ERROR("cannot allocate PCI GART page!\n");
+ goto done;
+ }
+
+ pci_gart = gart_info->table_handle->vaddr;
+ 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 %08LX mapped at %08lX\n",
+ (unsigned long long)bus_address,
+ (unsigned long)address);
+ }
+
+
+ max_ati_pages = (gart_info->table_size / sizeof(u32));
+ max_real_pages = max_ati_pages / (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
+ pages = (entry->pages <= max_real_pages)
+ ? entry->pages : max_real_pages;
+
+ if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
+ memset(pci_gart, 0, max_ati_pages * sizeof(u32));
+ } else {
+ memset_io((void __iomem *)map->handle, 0, max_ati_pages * sizeof(u32));
+ }
+
+ gart_idx = 0;
+ for (i = 0; i < pages; i++) {
+ /* we need to support large memory configurations */
+ entry->busaddr[i] = pci_map_page(dev->pdev, entry->pagelist[i],
+ 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+ if (pci_dma_mapping_error(dev->pdev, entry->busaddr[i])) {
+ DRM_ERROR("unable to map PCIGART pages!\n");
+ drm_ati_pcigart_cleanup(dev, gart_info);
+ address = NULL;
+ bus_address = 0;
+ goto done;
+ }
+ page_base = (u32) entry->busaddr[i];
+
+ for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
+ u32 val;
+
+ switch(gart_info->gart_reg_if) {
+ case DRM_ATI_GART_IGP:
+ val = page_base | 0xc;
+ break;
+ case DRM_ATI_GART_PCIE:
+ val = (page_base >> 8) | 0xc;
+ break;
+ default:
+ case DRM_ATI_GART_PCI:
+ val = page_base;
+ break;
+ }
+ if (gart_info->gart_table_location ==
+ DRM_ATI_GART_MAIN)
+ pci_gart[gart_idx] = cpu_to_le32(val);
+ else
+ DRM_WRITE32(map, gart_idx * sizeof(u32), val);
+ gart_idx++;
+ page_base += ATI_PCIGART_PAGE_SIZE;
+ }
+ }
+ ret = 1;
+
+#if defined(__i386__) || defined(__x86_64__)
+ wbinvd();
+#else
+ mb();
+#endif
+
+ done:
+ gart_info->addr = address;
+ gart_info->bus_addr = bus_address;
+ return ret;
+}
+EXPORT_SYMBOL(drm_ati_pcigart_init);