diff options
| author |   Ben Skeggs <bskeggs@redhat.com> | 2010-11-15 12:50:50 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2010-12-03 15:11:50 +1000 |
| commit | 20f63afe988a25b0a4d991e87b41f76ee14e2a84 (patch) | |
| tree | 4fd761fa508516e528d59d24dda81e80616bf5d7 | |
| parent | drm/nouveau: rework gpu-specific instmem interfaces (diff) | |
| download | linux-dev-20f63afe988a25b0a4d991e87b41f76ee14e2a84.tar.xz linux-dev-20f63afe988a25b0a4d991e87b41f76ee14e2a84.zip | |
drm/nv50: allocate page for unknown PFB object in nv50_fb.c
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv50_fb.c | 56 |
2 files changed, 56 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h index 822cd40b3eb4..e1619c674380 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drv.h +++ b/drivers/gpu/drm/nouveau/nouveau_drv.h @@ -311,6 +311,7 @@ struct nouveau_timer_engine { struct nouveau_fb_engine { int num_tiles; struct drm_mm tag_heap; + void *priv; int (*init)(struct drm_device *dev); void (*takedown)(struct drm_device *dev); diff --git a/drivers/gpu/drm/nouveau/nv50_fb.c b/drivers/gpu/drm/nouveau/nv50_fb.c index d745c952986a..aa6d78366078 100644 --- a/drivers/gpu/drm/nouveau/nv50_fb.c +++ b/drivers/gpu/drm/nouveau/nv50_fb.c @@ -3,16 +3,58 @@ #include "nouveau_drv.h" #include "nouveau_drm.h" +struct nv50_fb_priv { + struct page *r100c08_page; + dma_addr_t r100c08; +}; + +static int +nv50_fb_create(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nv50_fb_priv *priv; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->r100c08_page = alloc_page(GFP_KERNEL | __GFP_ZERO); + if (!priv->r100c08_page) { + kfree(priv); + return -ENOMEM; + } + + priv->r100c08 = pci_map_page(dev->pdev, priv->r100c08_page, 0, + PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); + if (pci_dma_mapping_error(dev->pdev, priv->r100c08)) { + __free_page(priv->r100c08_page); + kfree(priv); + return -EFAULT; + } + + dev_priv->engine.fb.priv = priv; + return 0; +} + int nv50_fb_init(struct drm_device *dev) { struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nv50_fb_priv *priv; + int ret; + + if (!dev_priv->engine.fb.priv) { + ret = nv50_fb_create(dev); + if (ret) + return ret; + } + priv = dev_priv->engine.fb.priv; /* Not a clue what this is exactly. Without pointing it at a * scratch page, VRAM->GART blits with M2MF (as in DDX DFS) * cause IOMMU "read from address 0" errors (rh#561267) */ - nv_wr32(dev, 0x100c08, dev_priv->gart_info.sg_dummy_bus >> 8); + nv_wr32(dev, 0x100c08, priv->r100c08 >> 8); /* This is needed to get meaningful information from 100c90 * on traps. No idea what these values mean exactly. */ @@ -36,6 +78,18 @@ nv50_fb_init(struct drm_device *dev) void nv50_fb_takedown(struct drm_device *dev) { + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nv50_fb_priv *priv; + + priv = dev_priv->engine.fb.priv; + if (!priv) + return; + dev_priv->engine.fb.priv = NULL; + + pci_unmap_page(dev->pdev, priv->r100c08, PAGE_SIZE, + PCI_DMA_BIDIRECTIONAL); + __free_page(priv->r100c08_page); + kfree(priv); } void |