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path: root/drivers/gpu/drm/nouveau/nvc0_fb.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvc0_fb.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvc0_fb.c68
1 files changed, 66 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/nvc0_fb.c b/drivers/gpu/drm/nouveau/nvc0_fb.c
index 26a996025dd..08e6b118f02 100644
--- a/drivers/gpu/drm/nouveau/nvc0_fb.c
+++ b/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);
}