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author | Joonas Lahtinen <joonas.lahtinen@linux.intel.com> | 2016-04-15 12:03:39 +0300 |
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committer | Joonas Lahtinen <joonas.lahtinen@linux.intel.com> | 2016-04-19 17:57:33 +0300 |
commit | e10fa551ae37b796d7ae60e5a951c18d00c2bbf0 (patch) | |
tree | 98c7415f69eab28d02d02961d59e20d5745a73b9 /drivers/gpu/drm/i915/i915_gem_stolen.c | |
parent | 44a7102484db0ddfa6f855b57ffe0566f739b55a (diff) | |
download | linux-e10fa551ae37b796d7ae60e5a951c18d00c2bbf0.tar.xz |
drm/i915: Clean up PCI config register handling
Do not use magic numbers, do not prefix stuff with "PCI_", do not
declare registers in implementation files. Also move the PCI
registers under correct comment in i915_reg.h.
v2:
- Consistently use BSM (not BDSM or other variants from PRM) (Chris)
- Also include register address to help identify the register (Chris)
v3:
- Refer to register value as *_val instead of *_reg (Chris)
v4:
- Make style checker happy
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_stolen.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_gem_stolen.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c index ea06da012d32..b7ce963fb8f8 100644 --- a/drivers/gpu/drm/i915/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c @@ -95,9 +95,9 @@ static unsigned long i915_stolen_to_physical(struct drm_device *dev) u32 base; /* Almost universally we can find the Graphics Base of Stolen Memory - * at offset 0x5c in the igfx configuration space. On a few (desktop) - * machines this is also mirrored in the bridge device at different - * locations, or in the MCHBAR. + * at register BSM (0x5c) in the igfx configuration space. On a few + * (desktop) machines this is also mirrored in the bridge device at + * different locations, or in the MCHBAR. * * On 865 we just check the TOUD register. * @@ -107,9 +107,11 @@ static unsigned long i915_stolen_to_physical(struct drm_device *dev) */ base = 0; if (INTEL_INFO(dev)->gen >= 3) { - /* Read Graphics Base of Stolen Memory directly */ - pci_read_config_dword(dev->pdev, 0x5c, &base); - base &= ~((1<<20) - 1); + u32 bsm; + + pci_read_config_dword(dev->pdev, BSM, &bsm); + + base = bsm & BSM_MASK; } else if (IS_I865G(dev)) { u16 toud = 0; |