drm/radeon: add cayman VM support for append packet.
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>
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 18ddd75..0d3f744 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -3483,6 +3483,27 @@
}
}
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;
}