flywithu/ntel-gpu-tools
1
0
Fork 0
mirror of https://github.com/tiagovignatti/intel-gpu-tools.git synced 2025-06-11 18:06:13 +00:00
Code Issues Releases Wiki Activity

intel_gtt: Harden against changes to kernel mappings of the GTT

Browse Source 
Rather than use the common mmio segment which will be in future
restricted to just the registers and so exclude the GTT portion on all
architectures, explicitly mmap the GTT ourselves. Repeat this mmapping
with a couple of flags until we matching the existing kernel mapping.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2012-08-26 21:22:14 +01:00 committed by Daniel Vetter
parent 3d148e164d
commit a4783f9485
1 changed files with 30 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
tools/intel_gtt.c
View File

@ -45,33 +45,47 @@ int main(int argc, char **argv)
int start, aper_size; int start, aper_size;
unsigned char *gtt; unsigned char *gtt;
uint32_t devid; uint32_t devid;
int flag[] = {
PCI_DEV_MAP_FLAG_WRITE_COMBINE,
PCI_DEV_MAP_FLAG_WRITABLE,
0
}, f;
pci_dev = intel_get_pci_device(); pci_dev = intel_get_pci_device();
devid = pci_dev->device_id; devid = pci_dev->device_id;
intel_get_mmio(pci_dev);
if (IS_GEN2(devid)) { if (IS_GEN2(devid)) {
printf("Unsupported chipset for gtt dumper\n"); printf("Unsupported chipset for gtt dumper\n");
exit(1); exit(1);
} }
if (IS_G4X(devid) || IS_GEN5(devid)) for (f = 0; flag[f] != 0; f++) {
gtt = ((unsigned char *)mmio + MB(2)); if (IS_GEN3(devid)) {
else if (IS_965(devid)) /* 915/945 chips has GTT range in bar 3 */
gtt = ((unsigned char *)mmio + KB(512)); if (pci_device_map_range(pci_dev,
else { pci_dev->regions[3].base_addr,
/* 915/945 chips has GTT range in bar 3 */ pci_dev->regions[3].size,
int err; flag[f],
err = pci_device_map_range(pci_dev, (void **)&gtt) == 0)
pci_dev->regions[3].base_addr, break;
pci_dev->regions[3].size, } else {
PCI_DEV_MAP_FLAG_WRITABLE, int offset;
(void **)&gtt); if (IS_G4X(devid) || IS_GEN5(devid))
if (err != 0) { offset = MB(2);
fprintf(stderr, "mapping GTT bar failed\n"); else
exit(1); offset = KB(512);
if (pci_device_map_range(pci_dev,
pci_dev->regions[0].base_addr + offset,
offset,
flag[f],
(void **)&gtt) == 0)
break;
} }
} }
if (flag[f] == 0) {
printf("Failed to map gtt\n");
exit(1);
}
aper_size = pci_dev->regions[2].size; aper_size = pci_dev->regions[2].size;