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drm/radeon: add a check to wait_reg_mem command

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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>
This commit is contained in:
Ilija Hadzic
2013-01-02 18:27:44 -05:00
committed by Alex Deucher
parent 40592a17b8
commit d6e18a3406
2 changed files with 11 additions and 0 deletions
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3
drivers/gpu/drm/radeon/evergreen_cs.c
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@@ -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: