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drm/radeon/kms: Check module arguments to be valid V2

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This patch add a function which check module argument to be
valid. On invalid argument it prints a warning and setback
the default value.

V2: Allow 0 for vram limit & agp mode which are the default
value

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jerome Glisse 2009-12-11 21:18:34 +01:00 committed by Dave Airlie
parent 0a0c7596c6
commit 3642133816
1 changed files with 68 additions and 5 deletions
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73
drivers/gpu/drm/radeon/radeon_device.c
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@ -546,9 +546,72 @@ void radeon_agp_disable(struct radeon_device *rdev)
}
}
/*
* Radeon device.
*/
void radeon_check_arguments(struct radeon_device *rdev)
{
/* vramlimit must be a power of two */
switch (radeon_vram_limit) {
case 0:
case 4:
case 8:
case 16:
case 32:
case 64:
case 128:
case 256:
case 512:
case 1024:
case 2048:
case 4096:
break;
default:
dev_warn(rdev->dev, "vram limit (%d) must be a power of 2\n",
radeon_vram_limit);
radeon_vram_limit = 0;
break;
}
radeon_vram_limit = radeon_vram_limit << 20;
/* gtt size must be power of two and greater or equal to 32M */
switch (radeon_gart_size) {
case 4:
case 8:
case 16:
dev_warn(rdev->dev, "gart size (%d) too small forcing to 512M\n",
radeon_gart_size);
radeon_gart_size = 512;
break;
case 32:
case 64:
case 128:
case 256:
case 512:
case 1024:
case 2048:
case 4096:
break;
default:
dev_warn(rdev->dev, "gart size (%d) must be a power of 2\n",
radeon_gart_size);
radeon_gart_size = 512;
break;
}
rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
/* AGP mode can only be -1, 1, 2, 4, 8 */
switch (radeon_agpmode) {
case -1:
case 0:
case 1:
case 2:
case 4:
case 8:
break;
default:
dev_warn(rdev->dev, "invalid AGP mode %d (valid mode: "
"-1, 0, 1, 2, 4, 8)\n", radeon_agpmode);
radeon_agpmode = 0;
break;
}
}
int radeon_device_init(struct radeon_device *rdev,
struct drm_device *ddev,
struct pci_dev *pdev,
@ -587,9 +650,9 @@ int radeon_device_init(struct radeon_device *rdev,
/* Set asic functions */
r = radeon_asic_init(rdev);
if (r) {
if (r)
return r;
}
radeon_check_arguments(rdev);
if (rdev->flags & RADEON_IS_AGP && radeon_agpmode == -1) {
radeon_agp_disable(rdev);