From 310ff414b32e66d832307bedd99ba75908e4e36d Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Tue, 24 May 2011 11:47:09 +1000 Subject: 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 --- drivers/gpu/drm/nouveau/nvc0_fb.c | 68 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 66 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nvc0_fb.c b/drivers/gpu/drm/nouveau/nvc0_fb.c index 26a996025dd2..08e6b118f021 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); } -- cgit v1.2.1