1 # SPDX-License-Identifier: GPL-2.0-only
4 $id: http://devicetree.org/schemas/iommu/arm,smmu.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: ARM System MMU Architecture Implementation
10 - Will Deacon <will@kernel.org>
11 - Robin Murphy <Robin.Murphy@arm.com>
14 ARM SoCs may contain an implementation of the ARM System Memory
15 Management Unit Architecture, which can be used to provide 1 or 2 stages
16 of address translation to bus masters external to the CPU.
18 The SMMU may also raise interrupts in response to various fault
23 pattern: "^iommu@[0-9a-f]*"
26 - description: Qcom SoCs implementing "arm,smmu-v2"
29 - qcom,msm8996-smmu-v2
30 - qcom,msm8998-smmu-v2
33 - description: Qcom SoCs implementing "arm,mmu-500"
36 - qcom,qcm2290-smmu-500
37 - qcom,sc7180-smmu-500
38 - qcom,sc7280-smmu-500
39 - qcom,sc8180x-smmu-500
40 - qcom,sc8280xp-smmu-500
41 - qcom,sdm845-smmu-500
44 - qcom,sm6350-smmu-500
45 - qcom,sm8150-smmu-500
46 - qcom,sm8250-smmu-500
47 - qcom,sm8350-smmu-500
48 - qcom,sm8450-smmu-500
50 - description: Qcom Adreno GPUs implementing "arm,smmu-v2"
55 - const: qcom,adreno-smmu
57 - description: Marvell SoCs implementing "arm,mmu-500"
59 - const: marvell,ap806-smmu-500
61 - description: NVIDIA SoCs that require memory controller interaction
62 and may program multiple ARM MMU-500s identically with the memory
63 controller interleaving translations between multiple instances
64 for improved performance.
67 - nvidia,tegra186-smmu
68 - nvidia,tegra194-smmu
69 - nvidia,tegra234-smmu
70 - const: nvidia,smmu-500
92 description: The number of global interrupts exposed by the device.
93 $ref: /schemas/types.yaml#/definitions/uint32
95 maximum: 260 # 2 secure, 2 non-secure, and up to 256 perf counters
100 See Documentation/devicetree/bindings/iommu/iommu.txt for details. With a
101 value of 1, each IOMMU specifier represents a distinct stream ID emitted
102 by that device into the relevant SMMU.
104 SMMUs with stream matching support and complex masters may use a value of
105 2, where the second cell of the IOMMU specifier represents an SMR mask to
106 combine with the ID in the first cell. Care must be taken to ensure the
107 set of matched IDs does not result in conflicts.
111 maxItems: 388 # 260 plus 128 contexts
113 Interrupt list, with the first #global-interrupts entries corresponding to
114 the global interrupts and any following entries corresponding to context
115 interrupts, specified in order of their indexing by the SMMU.
117 For SMMUv2 implementations, there must be exactly one interrupt per
118 context bank. In the case of a single, combined interrupt, it must be
119 listed multiple times.
123 Present if page table walks made by the SMMU are cache coherent with the
126 NOTE: this only applies to the SMMU itself, not masters connected
127 upstream of the SMMU.
129 calxeda,smmu-secure-config-access:
132 Enable proper handling of buggy implementations that always use secure
133 access to SMMU configuration registers. In this case non-secure aliases of
134 secure registers have to be used during SMMU configuration.
137 $ref: /schemas/types.yaml#/definitions/uint32
139 For SMMUs supporting stream matching and using #iommu-cells = <1>,
140 specifies a mask of bits to ignore when matching stream IDs (e.g. this may
141 be programmed into the SMRn.MASK field of every stream match register
142 used). For cases where it is desirable to ignore some portion of every
143 Stream ID (e.g. for certain MMU-500 configurations given globally unique
144 input IDs). This property is not valid for SMMUs using stream indexing, or
145 using stream matching with #iommu-cells = <2>, and may be ignored if
146 present in such cases.
155 - description: bus clock required for downstream bus access and for the
157 - description: interface clock required to access smmu's registers
158 through the TCU's programming interface.
163 nvidia,memory-controller:
165 A phandle to the memory controller on NVIDIA Tegra186 and later SoCs.
166 The memory controller needs to be programmed with a mapping of memory
167 client IDs to ARM SMMU stream IDs.
169 If this property is absent, the mapping programmed by early firmware
170 will be used and it is not guaranteed that IOMMU translations will be
171 enabled for any given device.
172 $ref: /schemas/types.yaml#/definitions/phandle
177 - '#global-interrupts'
181 additionalProperties: false
189 - nvidia,tegra186-smmu
190 - nvidia,tegra194-smmu
191 - nvidia,tegra234-smmu
198 # The reference to the memory controller is required to ensure that the
199 # memory client to stream ID mapping can be done synchronously with the
202 - nvidia,memory-controller
210 /* SMMU with stream matching or stream indexing */
211 smmu1: iommu@ba5e0000 {
212 compatible = "arm,smmu-v1";
213 reg = <0xba5e0000 0x10000>;
214 #global-interrupts = <2>;
215 interrupts = <0 32 4>,
217 <0 34 4>, /* This is the first context interrupt */
224 /* device with two stream IDs, 0 and 7 */
231 /* SMMU with stream matching */
232 smmu2: iommu@ba5f0000 {
233 compatible = "arm,smmu-v1";
234 reg = <0xba5f0000 0x10000>;
235 #global-interrupts = <2>;
236 interrupts = <0 38 4>,
238 <0 40 4>, /* This is the first context interrupt */
245 /* device with stream IDs 0 and 7 */
247 iommus = <&smmu2 0 0>,
251 /* device with stream IDs 1, 17, 33 and 49 */
253 iommus = <&smmu2 1 0x30>;
257 /* ARM MMU-500 with 10-bit stream ID input configuration */
258 smmu3: iommu@ba600000 {
259 compatible = "arm,mmu-500", "arm,smmu-v2";
260 reg = <0xba600000 0x10000>;
261 #global-interrupts = <2>;
262 interrupts = <0 44 4>,
264 <0 46 4>, /* This is the first context interrupt */
269 /* always ignore appended 5-bit TBU number */
270 stream-match-mask = <0x7c00>;
274 /* bus whose child devices emit one unique 10-bit stream
275 ID each, but may master through multiple SMMU TBUs */
276 iommu-map = <0 &smmu3 0 0x400>;
282 /* Qcom's arm,smmu-v2 implementation */
283 #include <dt-bindings/interrupt-controller/arm-gic.h>
284 #include <dt-bindings/interrupt-controller/irq.h>
285 smmu4: iommu@d00000 {
286 compatible = "qcom,msm8996-smmu-v2", "qcom,smmu-v2";
287 reg = <0xd00000 0x10000>;
289 #global-interrupts = <1>;
290 interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>,
291 <GIC_SPI 320 IRQ_TYPE_LEVEL_HIGH>,
292 <GIC_SPI 321 IRQ_TYPE_LEVEL_HIGH>;
294 power-domains = <&mmcc 0>;
296 clocks = <&mmcc 123>,
298 clock-names = "bus", "iface";