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authorIlija Hadzic <ihadzic@research.bell-labs.com>2013-01-02 18:27:44 -0500
committerAlex Deucher <alexander.deucher@amd.com>2013-01-31 16:24:44 -0500
commitd6e18a3406d401edeb96a01c7bb9d1689454c41b (patch)
tree9b3d4b39544c891bd3d6a27f4fef9a5148b9fa88 /drivers/gpu/drm/radeon/evergreen_cs.c
parent40592a17b8747903be95338f461573916a71d739 (diff)
drm/radeon: add a check to wait_reg_mem command
WAIT_REG_MEM on register does not allow the use of PFP. Enforce this restriction when checking packets sent from userland. Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com> Reviewed-by: Marek Olšák <maraeo@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/evergreen_cs.c')
-rw-r--r--drivers/gpu/drm/radeon/evergreen_cs.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 26905322d8e7..02aeb7fc3778 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -2101,6 +2101,9 @@ static int evergreen_packet3_check(struct radeon_cs_parser *p,
ib[idx+1] = (ib[idx+1] & 0x3) | (offset & 0xfffffffc);
ib[idx+2] = upper_32_bits(offset) & 0xff;
+ } else if (idx_value & 0x100) {
+ DRM_ERROR("cannot use PFP on REG wait\n");
+ return -EINVAL;
}
break;
case PACKET3_CP_DMA: