1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ast/ast_mm.c b/drivers/gpu/drm/ast/ast_mm.c
new file mode 100644
index 000000000000..0bc140319464
--- /dev/null
+++ b/drivers/gpu/drm/ast/ast_mm.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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 COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ */
+/*
+ * Authors: Dave Airlie <airlied@redhat.com>
+ */
+
+#include <linux/pci.h>
+
+#include <drm/drm_managed.h>
+#include <drm/drm_print.h>
+
+#include "ast_drv.h"
+
+static u32 ast_get_vram_size(struct ast_device *ast)
+{
+	u32 vram_size;
+	u8 vgacr99, vgacraa;
+
+	vgacraa = ast_get_index_reg(ast, AST_IO_VGACRI, 0xaa);
+	switch (vgacraa & AST_IO_VGACRAA_VGAMEM_SIZE_MASK) {
+	case 0:
+		vram_size = SZ_8M;
+		break;
+	case 1:
+		vram_size = SZ_16M;
+		break;
+	case 2:
+		vram_size = SZ_32M;
+		break;
+	case 3:
+		vram_size = SZ_64M;
+		break;
+	}
+
+	vgacr99 = ast_get_index_reg(ast, AST_IO_VGACRI, 0x99);
+	switch (vgacr99 & AST_IO_VGACR99_VGAMEM_RSRV_MASK) {
+	case 1:
+		vram_size -= SZ_1M;
+		break;
+	case 2:
+		vram_size -= SZ_2M;
+		break;
+	case 3:
+		vram_size -= SZ_4M;
+		break;
+	}
+
+	return vram_size;
+}
+
+int ast_mm_init(struct ast_device *ast)
+{
+	struct drm_device *dev = &ast->base;
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+	resource_size_t base, size;
+	u32 vram_size;
+
+	base = pci_resource_start(pdev, 0);
+	size = pci_resource_len(pdev, 0);
+
+	/* Don't fail on errors, but performance might be reduced. */
+	devm_arch_io_reserve_memtype_wc(dev->dev, base, size);
+	devm_arch_phys_wc_add(dev->dev, base, size);
+
+	vram_size = ast_get_vram_size(ast);
+
+	ast->vram = devm_ioremap_wc(dev->dev, base, vram_size);
+	if (!ast->vram)
+		return -ENOMEM;
+
+	ast->vram_base = base;
+	ast->vram_size = vram_size;
+
+	return 0;
+}