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drm/radeon: add cayman VM support for append packet.

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This adds support for SET_APPEND_CNT packet3 to the VM paths.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dave Airlie 2016-04-22 10:06:23 +10:00 committed by Alex Deucher
parent adcec288bc
commit 84ef4c12ee
1 changed files with 21 additions and 0 deletions
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21
drivers/gpu/drm/radeon/evergreen_cs.c
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@ -3483,6 +3483,27 @@ static int evergreen_vm_packet3_check(struct radeon_device *rdev,
}
}
break;
case PACKET3_SET_APPEND_CNT: {
uint32_t areg;
uint32_t allowed_reg_base;
if (pkt->count != 2) {
DRM_ERROR("bad SET_APPEND_CNT (invalid count)\n");
return -EINVAL;
}
allowed_reg_base = GDS_APPEND_COUNT_0;
allowed_reg_base -= PACKET3_SET_CONTEXT_REG_START;
allowed_reg_base >>= 2;
areg = idx_value >> 16;
if (areg < allowed_reg_base || areg > (allowed_reg_base + 11)) {
DRM_ERROR("forbidden register for append cnt 0x%08x at %d\n",
areg, idx);
return -EINVAL;
}
break;
}
default:
return -EINVAL;
}