mirror of https://gitee.com/openkylin/linux.git
drm/nvc0/fb: allocate page for some unknown PFFB object
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>
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74cfad188b
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310ff414b3
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@ -1,5 +1,5 @@
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/*
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/*
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* Copyright 2010 Red Hat Inc.
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* Copyright 2011 Red Hat Inc.
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*
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* copy of this software and associated documentation files (the "Software"),
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@ -23,16 +23,80 @@
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*/
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*/
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#include "drmP.h"
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#include "drmP.h"
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#include "drm.h"
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#include "nouveau_drv.h"
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#include "nouveau_drv.h"
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#include "nouveau_drm.h"
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struct nvc0_fb_priv {
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struct page *r100c10_page;
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dma_addr_t r100c10;
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};
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static void
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nvc0_fb_destroy(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
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struct nvc0_fb_priv *priv = pfb->priv;
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if (priv->r100c10_page) {
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pci_unmap_page(dev->pdev, priv->r100c10, PAGE_SIZE,
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PCI_DMA_BIDIRECTIONAL);
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__free_page(priv->r100c10_page);
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}
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kfree(priv);
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pfb->priv = NULL;
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}
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static int
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nvc0_fb_create(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
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struct nvc0_fb_priv *priv;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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pfb->priv = priv;
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priv->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
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if (!priv->r100c10_page) {
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nvc0_fb_destroy(dev);
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return -ENOMEM;
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}
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priv->r100c10 = pci_map_page(dev->pdev, priv->r100c10_page, 0,
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PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
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if (pci_dma_mapping_error(dev->pdev, priv->r100c10)) {
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nvc0_fb_destroy(dev);
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return -EFAULT;
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}
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return 0;
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}
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int
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int
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nvc0_fb_init(struct drm_device *dev)
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nvc0_fb_init(struct drm_device *dev)
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{
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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struct nvc0_fb_priv *priv;
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int ret;
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if (!dev_priv->engine.fb.priv) {
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ret = nvc0_fb_create(dev);
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if (ret)
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return ret;
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}
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priv = dev_priv->engine.fb.priv;
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nv_wr32(dev, 0x100c10, priv->r100c10 >> 8);
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return 0;
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return 0;
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}
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}
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void
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void
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nvc0_fb_takedown(struct drm_device *dev)
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nvc0_fb_takedown(struct drm_device *dev)
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{
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{
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nvc0_fb_destroy(dev);
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}
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}
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