From 5425f396dc03d42780cda66376ae389f0c2ccbe0 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs@redhat.com>
Date: Tue, 24 May 2011 11:47:09 +1000
Subject: [PATCH] --- yaml --- r: 260091 b: refs/heads/master c:
 310ff414b32e66d832307bedd99ba75908e4e36d h: refs/heads/master i:   260089:
 a3e2594e03a6eb1513966170478d3b46f79b5b5d   260087:
 ffed13d160c6b22dd6d8af4c9c409920c1540105 v: v3

---
 [refs]                                  |  2 +-
 trunk/drivers/gpu/drm/nouveau/nvc0_fb.c | 68 ++++++++++++++++++++++++-
 2 files changed, 67 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index 7e1558552f6f..c06b1b18be65 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 74cfad188b9e7e063ddb8d74fa20b38cbad10d79
+refs/heads/master: 310ff414b32e66d832307bedd99ba75908e4e36d
diff --git a/trunk/drivers/gpu/drm/nouveau/nvc0_fb.c b/trunk/drivers/gpu/drm/nouveau/nvc0_fb.c
index 26a996025dd2..08e6b118f021 100644
--- a/trunk/drivers/gpu/drm/nouveau/nvc0_fb.c
+++ b/trunk/drivers/gpu/drm/nouveau/nvc0_fb.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010 Red Hat Inc.
+ * Copyright 2011 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"),
@@ -23,16 +23,80 @@
  */
 
 #include "drmP.h"
-
+#include "drm.h"
 #include "nouveau_drv.h"
+#include "nouveau_drm.h"
+
+struct nvc0_fb_priv {
+	struct page *r100c10_page;
+	dma_addr_t r100c10;
+};
+
+static void
+nvc0_fb_destroy(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
+	struct nvc0_fb_priv *priv = pfb->priv;
+
+	if (priv->r100c10_page) {
+		pci_unmap_page(dev->pdev, priv->r100c10, PAGE_SIZE,
+			       PCI_DMA_BIDIRECTIONAL);
+		__free_page(priv->r100c10_page);
+	}
+
+	kfree(priv);
+	pfb->priv = NULL;
+}
+
+static int
+nvc0_fb_create(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
+	struct nvc0_fb_priv *priv;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	pfb->priv = priv;
+
+	priv->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+	if (!priv->r100c10_page) {
+		nvc0_fb_destroy(dev);
+		return -ENOMEM;
+	}
+
+	priv->r100c10 = pci_map_page(dev->pdev, priv->r100c10_page, 0,
+				     PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+	if (pci_dma_mapping_error(dev->pdev, priv->r100c10)) {
+		nvc0_fb_destroy(dev);
+		return -EFAULT;
+	}
+
+	return 0;
+}
 
 int
 nvc0_fb_init(struct drm_device *dev)
 {
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct nvc0_fb_priv *priv;
+	int ret;
+
+	if (!dev_priv->engine.fb.priv) {
+		ret = nvc0_fb_create(dev);
+		if (ret)
+			return ret;
+	}
+	priv = dev_priv->engine.fb.priv;
+
+	nv_wr32(dev, 0x100c10, priv->r100c10 >> 8);
 	return 0;
 }
 
 void
 nvc0_fb_takedown(struct drm_device *dev)
 {
+	nvc0_fb_destroy(dev);
 }