diff options
Diffstat (limited to 'drivers/char/agp/intel-gtt.c')
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 108 |
1 files changed, 56 insertions, 52 deletions
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index a997a202832e..79eb106c6f08 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -534,11 +534,12 @@ static struct aper_size_info_fixed intel_i830_sizes[] = static unsigned int intel_gtt_stolen_entries(void) { u16 gmch_ctrl; - unsigned int gtt_entries = 0; u8 rdct; int local = 0; static const int ddt[4] = { 0, 16, 32, 64 }; int size; /* reserved space (in kb) at the top of stolen memory */ + unsigned int overhead_entries, stolen_entries; + unsigned int stolen_size = 0; pci_read_config_word(intel_private.bridge_dev, I830_GMCH_CTRL, &gmch_ctrl); @@ -605,26 +606,28 @@ static unsigned int intel_gtt_stolen_entries(void) size = agp_bridge->driver->fetch_size() + 4; } + overhead_entries = size/4; + if (intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82830_HB || intel_private.bridge_dev->device == PCI_DEVICE_ID_INTEL_82845G_HB) { switch (gmch_ctrl & I830_GMCH_GMS_MASK) { case I830_GMCH_GMS_STOLEN_512: - gtt_entries = KB(512) - KB(size); + stolen_size = KB(512); break; case I830_GMCH_GMS_STOLEN_1024: - gtt_entries = MB(1) - KB(size); + stolen_size = MB(1); break; case I830_GMCH_GMS_STOLEN_8192: - gtt_entries = MB(8) - KB(size); + stolen_size = MB(8); break; case I830_GMCH_GMS_LOCAL: rdct = readb(intel_private.registers+I830_RDRAM_CHANNEL_TYPE); - gtt_entries = (I830_RDRAM_ND(rdct) + 1) * + stolen_size = (I830_RDRAM_ND(rdct) + 1) * MB(ddt[I830_RDRAM_DDT(rdct)]); local = 1; break; default: - gtt_entries = 0; + stolen_size = 0; break; } } else if (IS_SNB) { @@ -635,143 +638,144 @@ static unsigned int intel_gtt_stolen_entries(void) pci_read_config_word(intel_private.pcidev, SNB_GMCH_CTRL, &snb_gmch_ctl); switch (snb_gmch_ctl & SNB_GMCH_GMS_STOLEN_MASK) { case SNB_GMCH_GMS_STOLEN_32M: - gtt_entries = MB(32) - KB(size); + stolen_size = MB(32); break; case SNB_GMCH_GMS_STOLEN_64M: - gtt_entries = MB(64) - KB(size); + stolen_size = MB(64); break; case SNB_GMCH_GMS_STOLEN_96M: - gtt_entries = MB(96) - KB(size); + stolen_size = MB(96); break; case SNB_GMCH_GMS_STOLEN_128M: - gtt_entries = MB(128) - KB(size); + stolen_size = MB(128); break; case SNB_GMCH_GMS_STOLEN_160M: - gtt_entries = MB(160) - KB(size); + stolen_size = MB(160); break; case SNB_GMCH_GMS_STOLEN_192M: - gtt_entries = MB(192) - KB(size); + stolen_size = MB(192); break; case SNB_GMCH_GMS_STOLEN_224M: - gtt_entries = MB(224) - KB(size); + stolen_size = MB(224); break; case SNB_GMCH_GMS_STOLEN_256M: - gtt_entries = MB(256) - KB(size); + stolen_size = MB(256); break; case SNB_GMCH_GMS_STOLEN_288M: - gtt_entries = MB(288) - KB(size); + stolen_size = MB(288); break; case SNB_GMCH_GMS_STOLEN_320M: - gtt_entries = MB(320) - KB(size); + stolen_size = MB(320); break; case SNB_GMCH_GMS_STOLEN_352M: - gtt_entries = MB(352) - KB(size); + stolen_size = MB(352); break; case SNB_GMCH_GMS_STOLEN_384M: - gtt_entries = MB(384) - KB(size); + stolen_size = MB(384); break; case SNB_GMCH_GMS_STOLEN_416M: - gtt_entries = MB(416) - KB(size); + stolen_size = MB(416); break; case SNB_GMCH_GMS_STOLEN_448M: - gtt_entries = MB(448) - KB(size); + stolen_size = MB(448); break; case SNB_GMCH_GMS_STOLEN_480M: - gtt_entries = MB(480) - KB(size); + stolen_size = MB(480); break; case SNB_GMCH_GMS_STOLEN_512M: - gtt_entries = MB(512) - KB(size); + stolen_size = MB(512); break; } } else { switch (gmch_ctrl & I855_GMCH_GMS_MASK) { case I855_GMCH_GMS_STOLEN_1M: - gtt_entries = MB(1) - KB(size); + stolen_size = MB(1); break; case I855_GMCH_GMS_STOLEN_4M: - gtt_entries = MB(4) - KB(size); + stolen_size = MB(4); break; case I855_GMCH_GMS_STOLEN_8M: - gtt_entries = MB(8) - KB(size); + stolen_size = MB(8); break; case I855_GMCH_GMS_STOLEN_16M: - gtt_entries = MB(16) - KB(size); + stolen_size = MB(16); break; case I855_GMCH_GMS_STOLEN_32M: - gtt_entries = MB(32) - KB(size); + stolen_size = MB(32); break; case I915_GMCH_GMS_STOLEN_48M: /* Check it's really I915G */ if (IS_I915 || IS_I965 || IS_G33 || IS_G4X) - gtt_entries = MB(48) - KB(size); + stolen_size = MB(48); else - gtt_entries = 0; + stolen_size = 0; break; case I915_GMCH_GMS_STOLEN_64M: /* Check it's really I915G */ if (IS_I915 || IS_I965 || IS_G33 || IS_G4X) - gtt_entries = MB(64) - KB(size); + stolen_size = MB(64); else - gtt_entries = 0; + stolen_size = 0; break; case G33_GMCH_GMS_STOLEN_128M: if (IS_G33 || IS_I965 || IS_G4X) - gtt_entries = MB(128) - KB(size); + stolen_size = MB(128); else - gtt_entries = 0; + stolen_size = 0; break; case G33_GMCH_GMS_STOLEN_256M: if (IS_G33 || IS_I965 || IS_G4X) - gtt_entries = MB(256) - KB(size); + stolen_size = MB(256); else - gtt_entries = 0; + stolen_size = 0; break; case INTEL_GMCH_GMS_STOLEN_96M: if (IS_I965 || IS_G4X) - gtt_entries = MB(96) - KB(size); + stolen_size = MB(96); else - gtt_entries = 0; + stolen_size = 0; break; case INTEL_GMCH_GMS_STOLEN_160M: if (IS_I965 || IS_G4X) - gtt_entries = MB(160) - KB(size); + stolen_size = MB(160); else - gtt_entries = 0; + stolen_size = 0; break; case INTEL_GMCH_GMS_STOLEN_224M: if (IS_I965 || IS_G4X) - gtt_entries = MB(224) - KB(size); + stolen_size = MB(224); else - gtt_entries = 0; + stolen_size = 0; break; case INTEL_GMCH_GMS_STOLEN_352M: if (IS_I965 || IS_G4X) - gtt_entries = MB(352) - KB(size); + stolen_size = MB(352); else - gtt_entries = 0; + stolen_size = 0; break; default: - gtt_entries = 0; + stolen_size = 0; break; } } - if (!local && gtt_entries > intel_max_stolen) { + if (!local && stolen_size > intel_max_stolen) { dev_info(&intel_private.bridge_dev->dev, "detected %dK stolen memory, trimming to %dK\n", - gtt_entries / KB(1), intel_max_stolen / KB(1)); - gtt_entries = intel_max_stolen / KB(4); - } else if (gtt_entries > 0) { + stolen_size / KB(1), intel_max_stolen / KB(1)); + stolen_size = intel_max_stolen; + } else if (stolen_size > 0) { dev_info(&intel_private.bridge_dev->dev, "detected %dK %s memory\n", - gtt_entries / KB(1), local ? "local" : "stolen"); - gtt_entries /= KB(4); + stolen_size / KB(1), local ? "local" : "stolen"); } else { dev_info(&intel_private.bridge_dev->dev, "no pre-allocated video memory detected\n"); - gtt_entries = 0; + stolen_size = 0; } - return gtt_entries; + stolen_entries = stolen_size/KB(4) - overhead_entries; + + return stolen_entries; } static unsigned int intel_gtt_mappable_entries(void) |
