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authorEric Hustvedt <ehustvedt@cecropia.com>2006-05-27 18:30:00 +1000
committerDave Airlie <airlied@linux.ie>2006-05-27 18:30:00 +1000
commit1aecb393091d3c0787f92445420d96ef58c9782a (patch)
treead1a929d79f6219b461ab037105f0b52380bc41d
parentdf7df8ab7b38ca80bbaf5ffafd401d6c739fd45f (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.c46
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");