+static int gen8_ppgtt_allocate_page_tables(struct i915_hw_ppgtt *ppgtt,
+ const int max_pdp)
+{
+ struct page *pt_pages;
+ const int num_pt_pages = GEN8_PDES_PER_PAGE * max_pdp;
+
+ pt_pages = alloc_pages(GFP_KERNEL, get_order(num_pt_pages << PAGE_SHIFT));
+ if (!pt_pages)
+ return -ENOMEM;
+
+ ppgtt->gen8_pt_pages = pt_pages;
+ ppgtt->num_pt_pages = 1 << get_order(num_pt_pages << PAGE_SHIFT);
+
+ return 0;
+}
+
+static int gen8_ppgtt_allocate_dma(struct i915_hw_ppgtt *ppgtt)
+{
+ int i;
+
+ for (i = 0; i < ppgtt->num_pd_pages; i++) {
+ ppgtt->gen8_pt_dma_addr[i] = kcalloc(GEN8_PDES_PER_PAGE,
+ sizeof(dma_addr_t),
+ GFP_KERNEL);
+ if (!ppgtt->gen8_pt_dma_addr[i])
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int gen8_ppgtt_allocate_page_directories(struct i915_hw_ppgtt *ppgtt,
+ const int max_pdp)
+{
+ ppgtt->pd_pages = alloc_pages(GFP_KERNEL, get_order(max_pdp << PAGE_SHIFT));
+ if (!ppgtt->pd_pages)
+ return -ENOMEM;
+
+ ppgtt->num_pd_pages = 1 << get_order(max_pdp << PAGE_SHIFT);
+ BUG_ON(ppgtt->num_pd_pages > GEN8_LEGACY_PDPS);
+
+ return 0;
+}
+
+static int gen8_ppgtt_alloc(struct i915_hw_ppgtt *ppgtt,
+ const int max_pdp)
+{
+ int ret;
+
+ ret = gen8_ppgtt_allocate_page_directories(ppgtt, max_pdp);
+ if (ret)
+ return ret;
+
+ ret = gen8_ppgtt_allocate_page_tables(ppgtt, max_pdp);
+ if (ret) {
+ __free_pages(ppgtt->pd_pages, get_order(max_pdp << PAGE_SHIFT));
+ return ret;
+ }
+
+ ppgtt->num_pd_entries = max_pdp * GEN8_PDES_PER_PAGE;
+
+ ret = gen8_ppgtt_allocate_dma(ppgtt);
+ if (ret)
+ gen8_ppgtt_free(ppgtt);
+
+ return ret;
+}
+
+static int gen8_ppgtt_setup_page_directories(struct i915_hw_ppgtt *ppgtt,
+ const int pd)
+{
+ dma_addr_t pd_addr;
+ int ret;
+
+ pd_addr = pci_map_page(ppgtt->base.dev->pdev,
+ &ppgtt->pd_pages[pd], 0,
+ PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+
+ ret = pci_dma_mapping_error(ppgtt->base.dev->pdev, pd_addr);
+ if (ret)
+ return ret;
+
+ ppgtt->pd_dma_addr[pd] = pd_addr;
+
+ return 0;
+}
+
+static int gen8_ppgtt_setup_page_tables(struct i915_hw_ppgtt *ppgtt,
+ const int pd,
+ const int pt)
+{
+ dma_addr_t pt_addr;
+ struct page *p;
+ int ret;
+
+ p = &ppgtt->gen8_pt_pages[pd * GEN8_PDES_PER_PAGE + pt];
+ pt_addr = pci_map_page(ppgtt->base.dev->pdev,
+ p, 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+ ret = pci_dma_mapping_error(ppgtt->base.dev->pdev, pt_addr);
+ if (ret)
+ return ret;
+
+ ppgtt->gen8_pt_dma_addr[pd][pt] = pt_addr;
+
+ return 0;
+}
+