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drm/radeon/kms: manage r300 CMASK RAM access and allow CMASK clear

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The CMASK RAM is for colorbuffer compression (used in conjunction
with MSAA). Only one user (filp) can access it.

The CMASK RAM access is managed in the same way as Hyper-Z, but there is
a separate ioctl, because an app that uses MSAA does not necessarily
have to use zbuffering.

Signed-off-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Marek Olšák
2011-01-05 05:46:48 +01:00
committed by Dave Airlie
parent 2f299d5de0
commit 9eba4a93ce
6 changed files with 41 additions and 14 deletions
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9
drivers/gpu/drm/radeon/r300.c
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@@ -745,6 +745,11 @@ static int r300_packet0_check(struct radeon_cs_parser *p,
break;
case 0x4E00:
/* RB3D_CCTL */
if ((idx_value & (1 << 10)) && /* CMASK_ENABLE */
p->rdev->cmask_filp != p->filp) {
DRM_ERROR("Invalid RB3D_CCTL: Cannot enable CMASK.\n");
return -EINVAL;
}
track->num_cb = ((idx_value >> 5) & 0x3) + 1;
break;
case 0x4E38:
@@ -1206,6 +1211,10 @@ static int r300_packet3_check(struct radeon_cs_parser *p,
if (p->rdev->hyperz_filp != p->filp)
return -EINVAL;
break;
case PACKET3_3D_CLEAR_CMASK:
if (p->rdev->cmask_filp != p->filp)
return -EINVAL;
break;
case PACKET3_NOP:
break;
default: