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#include "drmP.h"
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
#include "i915_drm.h"
#include "i915_drv.h"
#define PCI_DEVICE_ID_INTEL_82946GZ_HB 0x2970
#define PCI_DEVICE_ID_INTEL_82965G_1_HB 0x2980
#define PCI_DEVICE_ID_INTEL_82965Q_HB 0x2990
#define PCI_DEVICE_ID_INTEL_82965G_HB 0x29A0
#define PCI_DEVICE_ID_INTEL_82965GM_HB 0x2A00
#define PCI_DEVICE_ID_INTEL_82965GME_HB 0x2A10
#define PCI_DEVICE_ID_INTEL_82945GME_HB 0x27AC
#define PCI_DEVICE_ID_INTEL_G33_HB 0x29C0
#define PCI_DEVICE_ID_INTEL_Q35_HB 0x29B0
#define PCI_DEVICE_ID_INTEL_Q33_HB 0x29D0
#define I915_IFPADDR 0x60
#define I965_IFPADDR 0x70
static struct _i9xx_private_compat {
void __iomem *flush_page;
struct resource ifp_resource;
} i9xx_private;
static struct _i8xx_private_compat {
void *flush_page;
struct page *page;
} i8xx_private;
static void
intel_compat_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
return;
}
static int intel_alloc_chipset_flush_resource(struct pci_dev *pdev)
{
int ret;
ret = pci_bus_alloc_resource(pdev->bus, &i9xx_private.ifp_resource, PAGE_SIZE,
PAGE_SIZE, PCIBIOS_MIN_MEM, 0,
intel_compat_align_resource, pdev);
if (ret != 0)
return ret;
return 0;
}
static void intel_i915_setup_chipset_flush(struct pci_dev *pdev)
{
int ret;
u32 temp;
pci_read_config_dword(pdev, I915_IFPADDR, &temp);
if (!(temp & 0x1)) {
intel_alloc_chipset_flush_resource(pdev);
pci_write_config_dword(pdev, I915_IFPADDR, (i9xx_private.ifp_resource.start & 0xffffffff) | 0x1);
} else {
temp &= ~1;
i9xx_private.ifp_resource.start = temp;
i9xx_private.ifp_resource.end = temp + PAGE_SIZE;
ret = request_resource(&iomem_resource, &i9xx_private.ifp_resource);
if (ret) {
i9xx_private.ifp_resource.start = 0;
printk("Failed inserting resource into tree\n");
}
}
}
static void intel_i965_g33_setup_chipset_flush(struct pci_dev *pdev)
{
u32 temp_hi, temp_lo;
int ret;
pci_read_config_dword(pdev, I965_IFPADDR + 4, &temp_hi);
pci_read_config_dword(pdev, I965_IFPADDR, &temp_lo);
if (!(temp_lo & 0x1)) {
intel_alloc_chipset_flush_resource(pdev);
pci_write_config_dword(pdev, I965_IFPADDR + 4, (i9xx_private.ifp_resource.start >> 32));
pci_write_config_dword(pdev, I965_IFPADDR, (i9xx_private.ifp_resource.start & 0xffffffff) | 0x1);
} else {
u64 l64;
temp_lo &= ~0x1;
l64 = ((u64)temp_hi << 32) | temp_lo;
i9xx_private.ifp_resource.start = l64;
i9xx_private.ifp_resource.end = l64 + PAGE_SIZE;
ret = request_resource(&iomem_resource, &i9xx_private.ifp_resource);
if (!ret) {
i9xx_private.ifp_resource.start = 0;
printk("Failed inserting resource into tree\n");
}
}
}
static void intel_i8xx_fini_flush(struct drm_device *dev)
{
kunmap(i8xx_private.page);
i8xx_private.flush_page = NULL;
unmap_page_from_agp(i8xx_private.page);
flush_agp_mappings();
__free_page(i8xx_private.page);
}
static void intel_i8xx_setup_flush(struct drm_device *dev)
{
i8xx_private.page = alloc_page(GFP_KERNEL | __GFP_ZERO | GFP_DMA32);
if (!i8xx_private.page) {
return;
}
/* make page uncached */
map_page_into_agp(i8xx_private.page);
flush_agp_mappings();
i8xx_private.flush_page = kmap(i8xx_private.page);
if (!i8xx_private.flush_page)
intel_i8xx_fini_flush(dev);
}
static void intel_i8xx_flush_page(struct drm_device *dev)
{
unsigned int *pg = i8xx_private.flush_page;
int i;
/* HAI NUT CAN I HAZ HAMMER?? */
for (i = 0; i < 256; i++)
*(pg + i) = i;
DRM_MEMORYBARRIER();
}
static void intel_i9xx_setup_flush(struct drm_device *dev)
{
struct pci_dev *agp_dev = dev->agp->agp_info.device;
i9xx_private.ifp_resource.name = "GMCH IFPBAR";
i9xx_private.ifp_resource.flags = IORESOURCE_MEM;
/* Setup chipset flush for 915 */
if (IS_I965G(dev) || IS_G33(dev)) {
intel_i965_g33_setup_chipset_flush(agp_dev);
} else {
intel_i915_setup_chipset_flush(agp_dev);
}
if (i9xx_private.ifp_resource.start) {
i9xx_private.flush_page = ioremap_nocache(i9xx_private.ifp_resource.start, PAGE_SIZE);
if (!i9xx_private.flush_page)
printk("unable to ioremap flush page - no chipset flushing");
}
}
static void intel_i9xx_fini_flush(struct drm_device *dev)
{
iounmap(i9xx_private.flush_page);
release_resource(&i9xx_private.ifp_resource);
}
static void intel_i9xx_flush_page(struct drm_device *dev)
{
if (i9xx_private.flush_page)
writel(1, i9xx_private.flush_page);
}
void intel_init_chipset_flush_compat(struct drm_device *dev)
{
/* not flush on i8xx */
if (IS_I9XX(dev))
intel_i9xx_setup_flush(dev);
else
intel_i8xx_setup_flush(dev);
}
void intel_fini_chipset_flush_compat(struct drm_device *dev)
{
/* not flush on i8xx */
if (IS_I9XX(dev))
intel_i9xx_fini_flush(dev);
else
intel_i8xx_fini_flush(dev);
}
void drm_agp_chipset_flush(struct drm_device *dev)
{
if (IS_I9XX(dev))
intel_i9xx_flush_page(dev);
else
intel_i8xx_flush_page(dev);
}
#endif
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