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intel-agp: fixup resource handling in flush code.

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The flush code resource handling was having problems where some BIOS
reserve the resource in a pnp block and some don't.

Also there was a bug in that configure was being called at resume
and resetting some of the structs.

Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Dave Airlie 2008-01-23 15:34:29 +10:00 committed by Dave Airlie
parent 4e8b6e2594
commit 4d64dd9e5d
1 changed files with 23 additions and 10 deletions
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33
drivers/char/agp/intel-agp.c
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@ -126,6 +126,7 @@ static struct _intel_private {
};
struct page *i8xx_page;
struct resource ifp_resource;
int resource_valid;
} intel_private;
static int intel_i810_fetch_size(void)
@ -603,10 +604,14 @@ static void intel_i830_fini_flush(void)
flush_agp_mappings();
__free_page(intel_private.i8xx_page);
intel_private.i8xx_page = NULL;
}
static void intel_i830_setup_flush(void)
{
/* return if we've already set the flush mechanism up */
if (intel_private.i8xx_page)
return;
intel_private.i8xx_page = alloc_page(GFP_KERNEL | __GFP_ZERO | GFP_DMA32);
if (!intel_private.i8xx_page) {
@ -846,18 +851,18 @@ static void intel_i915_setup_chipset_flush(void)
pci_read_config_dword(agp_bridge->dev, I915_IFPADDR, &temp);
if (!(temp & 0x1)) {
intel_alloc_chipset_flush_resource();
intel_private.resource_valid = 1;
pci_write_config_dword(agp_bridge->dev, I915_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1);
} else {
temp &= ~1;
intel_private.resource_valid = 1;
intel_private.ifp_resource.start = temp;
intel_private.ifp_resource.end = temp + PAGE_SIZE;
ret = request_resource(&iomem_resource, &intel_private.ifp_resource);
if (ret) {
intel_private.ifp_resource.start = 0;
printk("Failed inserting resource into tree\n");
}
/* some BIOSes reserve this area in a pnp some don't */
if (ret)
intel_private.resource_valid = 0;
}
}
@ -873,6 +878,7 @@ static void intel_i965_g33_setup_chipset_flush(void)
intel_alloc_chipset_flush_resource();
intel_private.resource_valid = 1;
pci_write_config_dword(agp_bridge->dev, I965_IFPADDR + 4,
upper_32_bits(intel_private.ifp_resource.start));
pci_write_config_dword(agp_bridge->dev, I965_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1);
@ -882,20 +888,23 @@ static void intel_i965_g33_setup_chipset_flush(void)
temp_lo &= ~0x1;
l64 = ((u64)temp_hi << 32) | temp_lo;
intel_private.resource_valid = 1;
intel_private.ifp_resource.start = l64;
intel_private.ifp_resource.end = l64 + PAGE_SIZE;
ret = request_resource(&iomem_resource, &intel_private.ifp_resource);
if (!ret) {
printk("Failed inserting resource into tree - continuing\n");
}
/* some BIOSes reserve this area in a pnp some don't */
if (ret)
intel_private.resource_valid = 0;
}
}
static void intel_i9xx_setup_flush(void)
{
/* setup a resource for this object */
memset(&intel_private.ifp_resource, 0, sizeof(intel_private.ifp_resource));
/* return if already configured */
if (intel_private.ifp_resource.start)
return;
/* setup a resource for this object */
intel_private.ifp_resource.name = "Intel Flush Page";
intel_private.ifp_resource.flags = IORESOURCE_MEM;
@ -951,6 +960,10 @@ static void intel_i915_cleanup(void)
{
if (intel_private.i9xx_flush_page)
iounmap(intel_private.i9xx_flush_page);
if (intel_private.resource_valid)
release_resource(&intel_private.ifp_resource);
intel_private.ifp_resource.start = 0;
intel_private.resource_valid = 0;
iounmap(intel_private.gtt);
iounmap(intel_private.registers);
}