mirror of https://gitee.com/openkylin/linux.git
135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/*
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* Copyright 2011 Red Hat Inc.
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*
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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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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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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_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 inline void
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nvc0_mfb_subp_isr(struct drm_device *dev, int unit, int subp)
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{
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u32 subp_base = 0x141000 + (unit * 0x2000) + (subp * 0x400);
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u32 stat = nv_rd32(dev, subp_base + 0x020);
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if (stat) {
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NV_INFO(dev, "PMFB%d_SUBP%d: 0x%08x\n", unit, subp, stat);
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nv_wr32(dev, subp_base + 0x020, stat);
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}
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}
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static void
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nvc0_mfb_isr(struct drm_device *dev)
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{
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u32 units = nv_rd32(dev, 0x00017c);
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while (units) {
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u32 subp, unit = ffs(units) - 1;
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for (subp = 0; subp < 2; subp++)
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nvc0_mfb_subp_isr(dev, unit, subp);
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units &= ~(1 << unit);
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}
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/* we do something horribly wrong and upset PMFB a lot, so mask off
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* interrupts from it after the first one until it's fixed
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*/
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nv_mask(dev, 0x000640, 0x02000000, 0x00000000);
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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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nouveau_irq_unregister(dev, 25);
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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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nouveau_irq_register(dev, 25, nvc0_mfb_isr);
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return 0;
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}
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int
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nvc0_fb_init(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 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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}
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void
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nvc0_fb_takedown(struct drm_device *dev)
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{
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nvc0_fb_destroy(dev);
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}
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