[PATCH v3 05/24] dt-bindings: memory: mediatek: Add domain definition

Yong Wu
2020-09-30T07:13:31Z

In the latest SoC, there are several HW IP require a sepecial iova
range, mainly CCU and VPU has this requirement. Take CCU as a example,
CCU require its iova locate in the range(0x4000_0000 ~ 0x43ff_ffff).

In this patch we add a domain definition for the special port. In the
example of CCU, If we preassign CCU port in domain1, then iommu driver
will prepare a independent iommu domain of the special iova range for it,
then the iova got from dma_alloc_attrs(ccu-dev) will locate in its special
range.

This is a preparing patch for multi-domain support.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
include/dt-bindings/memory/mtk-smi-larb-port.h | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/dt-bindings/memory/mtk-smi-larb-port.h b/include/dt-bindings/memory/mtk-smi-larb-port.h
index f4d8e3aed0bc..d00f5de8438b 100644
--- a/include/dt-bindings/memory/mtk-smi-larb-port.h
+++ b/include/dt-bindings/memory/mtk-smi-larb-port.h
@@ -7,9 +7,16 @@
#define __DTS_MTK_IOMMU_PORT_H_

#define MTK_LARB_NR_MAX 32
+#define MTK_M4U_DOM_NR_MAX 8
+
+#define MTK_M4U_DOM_ID(domid, larb, port) \
+ (((domid) & 0x7) << 16 | (((larb) & 0x1f) << 5) | ((port) & 0x1f))
+
+/* The default dom id is 0. */
+#define MTK_M4U_ID(larb, port) MTK_M4U_DOM_ID(0, larb, port)

-#define MTK_M4U_ID(larb, port) (((larb) << 5) | (port))
#define MTK_M4U_TO_LARB(id) (((id) >> 5) & 0x1f)
#define MTK_M4U_TO_PORT(id) ((id) & 0x1f)
+#define MTK_M4U_TO_DOM(id) (((id) >> 16) & 0x7)

#endif
--
2.18.0