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drm/nvc0/fb: allocate page for some unknown PFFB object

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Fixes DMAR faults during accel, more than likely a similar problem to what
was solved on nv50 previously.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-05-24 11:47:09 +10:00
parent 74cfad188b
commit 310ff414b3
1 changed files with 66 additions and 2 deletions
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68
drivers/gpu/drm/nouveau/nvc0_fb.c
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@ -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);
}