diff options
Diffstat (limited to 'drivers/char/agp/intel-agp.c')
| -rw-r--r-- | drivers/char/agp/intel-agp.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c index 6fa97ae6a126..af7ff56b75d0 100644 --- a/drivers/char/agp/intel-agp.c +++ b/drivers/char/agp/intel-agp.c @@ -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); } |