diff options
| author | Eric Hustvedt <ehustvedt@cecropia.com> | 2006-05-27 18:30:00 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2006-05-27 18:30:00 +1000 |
| commit | 1aecb393091d3c0787f92445420d96ef58c9782a (patch) | |
| tree | ad1a929d79f6219b461ab037105f0b52380bc41d | |
| parent | df7df8ab7b38ca80bbaf5ffafd401d6c739fd45f (diff) | |
Adds support for 256MB aperture on 945 chipsets to the intelfb driver
and corrects calculation of stolen memory overhead.
Signed-off-by: Eric Hustvedt <ehustvedt@cecropia.com>
Signed-off-by: Dennis Munsie <dmunsie@cecropia.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
| -rw-r--r-- | drivers/video/intelfb/intelfbhw.c | 46 |
1 files changed, 33 insertions, 13 deletions
diff --git a/drivers/video/intelfb/intelfbhw.c b/drivers/video/intelfb/intelfbhw.c index eba8f8f6a4d..82a2b9048df 100644 --- a/drivers/video/intelfb/intelfbhw.c +++ b/drivers/video/intelfb/intelfbhw.c @@ -156,6 +156,7 @@ intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size, { struct pci_dev *bridge_dev; u16 tmp; + int stolen_overhead; if (!pdev || !aperture_size || !stolen_size) return 1; @@ -170,21 +171,41 @@ intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size, tmp = 0; pci_read_config_word(bridge_dev, INTEL_GMCH_CTRL, &tmp); switch (pdev->device) { - case PCI_DEVICE_ID_INTEL_830M: - case PCI_DEVICE_ID_INTEL_845G: + case PCI_DEVICE_ID_INTEL_915G: + case PCI_DEVICE_ID_INTEL_915GM: + case PCI_DEVICE_ID_INTEL_945G: + case PCI_DEVICE_ID_INTEL_945GM: + /* 915 and 945 chipsets support a 256MB aperture. + Aperture size is determined by inspected the + base address of the aperture. */ + if (pci_resource_start(pdev, 2) & 0x08000000) + *aperture_size = MB(128); + else + *aperture_size = MB(256); + break; + default: if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M) *aperture_size = MB(64); else *aperture_size = MB(128); + break; + } + + /* Stolen memory size is reduced by the GTT and the popup. + GTT is 1K per MB of aperture size, and popup is 4K. */ + stolen_overhead = (*aperture_size / MB(1)) + 4; + switch(pdev->device) { + case PCI_DEVICE_ID_INTEL_830M: + case PCI_DEVICE_ID_INTEL_845G: switch (tmp & INTEL_830_GMCH_GMS_MASK) { case INTEL_830_GMCH_GMS_STOLEN_512: - *stolen_size = KB(512) - KB(132); + *stolen_size = KB(512) - KB(stolen_overhead); return 0; case INTEL_830_GMCH_GMS_STOLEN_1024: - *stolen_size = MB(1) - KB(132); + *stolen_size = MB(1) - KB(stolen_overhead); return 0; case INTEL_830_GMCH_GMS_STOLEN_8192: - *stolen_size = MB(8) - KB(132); + *stolen_size = MB(8) - KB(stolen_overhead); return 0; case INTEL_830_GMCH_GMS_LOCAL: ERR_MSG("only local memory found\n"); @@ -199,28 +220,27 @@ intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size, } break; default: - *aperture_size = MB(128); switch (tmp & INTEL_855_GMCH_GMS_MASK) { case INTEL_855_GMCH_GMS_STOLEN_1M: - *stolen_size = MB(1) - KB(132); + *stolen_size = MB(1) - KB(stolen_overhead); return 0; case INTEL_855_GMCH_GMS_STOLEN_4M: - *stolen_size = MB(4) - KB(132); + *stolen_size = MB(4) - KB(stolen_overhead); return 0; case INTEL_855_GMCH_GMS_STOLEN_8M: - *stolen_size = MB(8) - KB(132); + *stolen_size = MB(8) - KB(stolen_overhead); return 0; case INTEL_855_GMCH_GMS_STOLEN_16M: - *stolen_size = MB(16) - KB(132); + *stolen_size = MB(16) - KB(stolen_overhead); return 0; case INTEL_855_GMCH_GMS_STOLEN_32M: - *stolen_size = MB(32) - KB(132); + *stolen_size = MB(32) - KB(stolen_overhead); return 0; case INTEL_915G_GMCH_GMS_STOLEN_48M: - *stolen_size = MB(48) - KB(132); + *stolen_size = MB(48) - KB(stolen_overhead); return 0; case INTEL_915G_GMCH_GMS_STOLEN_64M: - *stolen_size = MB(64) - KB(132); + *stolen_size = MB(64) - KB(stolen_overhead); return 0; case INTEL_855_GMCH_GMS_DISABLED: ERR_MSG("video memory is disabled\n"); |