diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2014-01-04 02:26:58 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-01-07 01:49:22 +0100 |
| commit | e501b3d87f003dfad8fcbd0f55ae17ea52495a56 (patch) | |
| tree | 1307d77ead535d134b6f62df53c923cf1247baa6 /drivers/char/agp/agp.h | |
| parent | PCI: Add pci_bus_address() to get bus address of a BAR (diff) | |
| download | linux-e501b3d87f003dfad8fcbd0f55ae17ea52495a56.tar.xz linux-e501b3d87f003dfad8fcbd0f55ae17ea52495a56.zip | |
agp: Support 64-bit APBASE
Per the AGP 3.0 spec, APBASE is a standard PCI BAR and may be either 32
bits or 64 bits wide. Many drivers read APBASE directly, but they only
handled 32-bit BARs.
The PCI core reads APBASE at enumeration-time. Use pci_bus_address()
instead of reading it again in the driver. This works correctly for both
32-bit and 64-bit BARs.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/char/agp/agp.h')
| -rw-r--r-- | drivers/char/agp/agp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h index 923f99df4f1c..b709749c8639 100644 --- a/drivers/char/agp/agp.h +++ b/drivers/char/agp/agp.h @@ -239,6 +239,7 @@ long compat_agp_ioctl(struct file *file, unsigned int cmd, unsigned long arg); /* Chipset independent registers (from AGP Spec) */ #define AGP_APBASE 0x10 +#define AGP_APERTURE_BAR 0 #define AGPSTAT 0x4 #define AGPCMD 0x8 |