diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvc0_fb.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvc0_fb.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvc0_fb.c b/drivers/gpu/drm/nouveau/nvc0_fb.c new file mode 100644 index 00000000..f704e942 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvc0_fb.c @@ -0,0 +1,134 @@ +/* + * 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"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs + */ + +#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 inline void +nvc0_mfb_subp_isr(struct drm_device *dev, int unit, int subp) +{ + u32 subp_base = 0x141000 + (unit * 0x2000) + (subp * 0x400); + u32 stat = nv_rd32(dev, subp_base + 0x020); + + if (stat) { + NV_INFO(dev, "PMFB%d_SUBP%d: 0x%08x\n", unit, subp, stat); + nv_wr32(dev, subp_base + 0x020, stat); + } +} + +static void +nvc0_mfb_isr(struct drm_device *dev) +{ + u32 units = nv_rd32(dev, 0x00017c); + while (units) { + u32 subp, unit = ffs(units) - 1; + for (subp = 0; subp < 2; subp++) + nvc0_mfb_subp_isr(dev, unit, subp); + units &= ~(1 << unit); + } + + /* we do something horribly wrong and upset PMFB a lot, so mask off + * interrupts from it after the first one until it's fixed + */ + nv_mask(dev, 0x000640, 0x02000000, 0x00000000); +} + +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; + + nouveau_irq_unregister(dev, 25); + + 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; + } + + nouveau_irq_register(dev, 25, nvc0_mfb_isr); + 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); +} |