diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/agp/intel-agp.c | 108 |
1 files changed, 78 insertions, 30 deletions
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c index 4d062fc3e825..ce75fa3a4723 100644 --- a/drivers/char/agp/intel-agp.c +++ b/drivers/char/agp/intel-agp.c @@ -117,7 +117,11 @@ static struct _intel_private { * popup and for the GTT. */ int gtt_entries; /* i830+ */ - void __iomem *flush_page; + union { + void __iomem *i9xx_flush_page; + void *i8xx_flush_page; + }; + struct page *i8xx_page; struct resource ifp_resource; } intel_private; @@ -579,6 +583,44 @@ static void intel_i830_init_gtt_entries(void) intel_private.gtt_entries = gtt_entries; } +static void intel_i830_fini_flush(void) +{ + kunmap(intel_private.i8xx_page); + intel_private.i8xx_flush_page = NULL; + unmap_page_from_agp(intel_private.i8xx_page); + flush_agp_mappings(); + + __free_page(intel_private.i8xx_page); +} + +static void intel_i830_setup_flush(void) +{ + + intel_private.i8xx_page = alloc_page(GFP_KERNEL | __GFP_ZERO | GFP_DMA32); + if (!intel_private.i8xx_page) { + return; + } + + /* make page uncached */ + map_page_into_agp(intel_private.i8xx_page); + flush_agp_mappings(); + + intel_private.i8xx_flush_page = kmap(intel_private.i8xx_page); + if (!intel_private.i8xx_flush_page) + intel_i830_fini_flush(); +} + +static void intel_i830_chipset_flush(struct agp_bridge_data *bridge) +{ + unsigned int *pg = intel_private.i8xx_flush_page; + int i; + + for (i = 0; i < 256; i+=2) + *(pg + i) = i; + + wmb(); +} + /* The intel i830 automatically initializes the agp aperture during POST. * Use the memory already set aside for in the GTT. */ @@ -679,6 +721,8 @@ static int intel_i830_configure(void) } global_cache_flush(); + + intel_i830_setup_flush(); return 0; } @@ -778,11 +822,8 @@ static int intel_alloc_chipset_flush_resource(void) ret = pci_bus_alloc_resource(agp_bridge->dev->bus, &intel_private.ifp_resource, PAGE_SIZE, PAGE_SIZE, PCIBIOS_MIN_MEM, 0, pcibios_align_resource, agp_bridge->dev); - if (ret != 0) - return ret; - printk("intel priv bus start %08lx\n", intel_private.ifp_resource.start); - return 0; + return ret; } static void intel_i915_setup_chipset_flush(void) @@ -822,7 +863,6 @@ static void intel_i965_g33_setup_chipset_flush(void) pci_write_config_dword(agp_bridge->dev, I965_IFPADDR + 4, (intel_private.ifp_resource.start >> 32)); pci_write_config_dword(agp_bridge->dev, I965_IFPADDR, (intel_private.ifp_resource.start & 0xffffffff) | 0x1); - intel_private.flush_page = ioremap_nocache(intel_private.ifp_resource.start, PAGE_SIZE); } else { u64 l64; @@ -833,12 +873,33 @@ static void intel_i965_g33_setup_chipset_flush(void) intel_private.ifp_resource.end = l64 + 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"); + printk("Failed inserting resource into tree - continuing\n"); } } } +static void intel_i9xx_setup_flush(void) +{ + /* setup a resource for this object */ + memset(&intel_private.ifp_resource, 0, sizeof(intel_private.ifp_resource)); + + intel_private.ifp_resource.name = "Intel Flush Page"; + intel_private.ifp_resource.flags = IORESOURCE_MEM; + + /* Setup chipset flush for 915 */ + if (IS_I965 || IS_G33) { + intel_i965_g33_setup_chipset_flush(); + } else { + intel_i915_setup_chipset_flush(); + } + + if (intel_private.ifp_resource.start) { + intel_private.i9xx_flush_page = ioremap_nocache(intel_private.ifp_resource.start, PAGE_SIZE); + if (!intel_private.i9xx_flush_page) + printk("unable to ioremap flush page - no chipset flushing"); + } +} + static int intel_i915_configure(void) { struct aper_size_info_fixed *current_size; @@ -868,40 +929,23 @@ static int intel_i915_configure(void) global_cache_flush(); - /* setup a resource for this object */ - memset(&intel_private.ifp_resource, 0, sizeof(intel_private.ifp_resource)); - - intel_private.ifp_resource.name = "Intel Flush Page"; - intel_private.ifp_resource.flags = IORESOURCE_MEM; - - /* Setup chipset flush for 915 */ - if (IS_I965 || IS_G33) { - intel_i965_g33_setup_chipset_flush(); - } else { - intel_i915_setup_chipset_flush(); - } - - if (intel_private.ifp_resource.start) { - intel_private.flush_page = ioremap_nocache(intel_private.ifp_resource.start, PAGE_SIZE); - if (!intel_private.flush_page) - printk("unable to ioremap flush page - no chipset flushing"); - } + intel_i9xx_setup_flush(); return 0; } static void intel_i915_cleanup(void) { - if (intel_private.flush_page) - iounmap(intel_private.flush_page); + if (intel_private.i9xx_flush_page) + iounmap(intel_private.i9xx_flush_page); iounmap(intel_private.gtt); iounmap(intel_private.registers); } static void intel_i915_chipset_flush(struct agp_bridge_data *bridge) { - if (intel_private.flush_page) - writel(1, intel_private.flush_page); + if (intel_private.i9xx_flush_page) + writel(1, intel_private.i9xx_flush_page); } static int intel_i915_insert_entries(struct agp_memory *mem,off_t pg_start, @@ -1395,6 +1439,8 @@ static int intel_845_configure(void) pci_write_config_byte(agp_bridge->dev, INTEL_I845_AGPM, temp2 | (1 << 1)); /* clear any possible error conditions */ pci_write_config_word(agp_bridge->dev, INTEL_I845_ERRSTS, 0x001c); + + intel_i830_setup_flush(); return 0; } @@ -1651,6 +1697,7 @@ static const struct agp_bridge_driver intel_830_driver = { .agp_alloc_page = agp_generic_alloc_page, .agp_destroy_page = agp_generic_destroy_page, .agp_type_to_mask_type = intel_i830_type_to_mask_type, + .chipset_flush = intel_i830_chipset_flush, }; static const struct agp_bridge_driver intel_820_driver = { @@ -1747,6 +1794,7 @@ static const struct agp_bridge_driver intel_845_driver = { .agp_alloc_page = agp_generic_alloc_page, .agp_destroy_page = agp_generic_destroy_page, .agp_type_to_mask_type = agp_generic_type_to_mask_type, + .chipset_flush = intel_i830_chipset_flush, }; static const struct agp_bridge_driver intel_850_driver = { |