/*
* 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);
}
