1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/qcom,ipa.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Qualcomm IP Accelerator (IPA)
maintainers:
- Alex Elder <elder@kernel.org>
description:
This binding describes the Qualcomm IPA. The IPA is capable of offloading
certain network processing tasks (e.g. filtering, routing, and NAT) from
the main processor.
The IPA sits between multiple independent "execution environments,"
including the Application Processor (AP) and the modem. The IPA presents
a Generic Software Interface (GSI) to each execution environment.
The GSI is an integral part of the IPA, but it is logically isolated
and has a distinct interrupt and a separately-defined address space.
See also soc/qcom/qcom,smp2p.txt and interconnect/interconnect.txt. See
iommu/iommu.txt and iommu/arm,smmu.yaml for more information about SMMU
bindings.
- |
-------- ---------
| | | |
| AP +<---. .----+ Modem |
| +--. | | .->+ |
| | | | | | | |
-------- | | | | ---------
v | v |
--+-+---+-+--
| GSI |
|-----------|
| |
| IPA |
| |
-------------
properties:
compatible:
enum:
- qcom,sc7180-ipa
- qcom,sc7280-ipa
- qcom,sdm845-ipa
- qcom,sdx55-ipa
- qcom,sm8350-ipa
reg:
items:
- description: IPA registers
- description: IPA shared memory
- description: GSI registers
reg-names:
items:
- const: ipa-reg
- const: ipa-shared
- const: gsi
iommus:
maxItems: 1
clocks:
maxItems: 1
clock-names:
const: core
interrupts:
items:
- description: IPA interrupt (hardware IRQ)
- description: GSI interrupt (hardware IRQ)
- description: Modem clock query interrupt (smp2p interrupt)
- description: Modem setup ready interrupt (smp2p interrupt)
interrupt-names:
items:
- const: ipa
- const: gsi
- const: ipa-clock-query
- const: ipa-setup-ready
interconnects:
items:
- description: Interconnect path between IPA and main memory
- description: Interconnect path between IPA and internal memory
- description: Interconnect path between IPA and the AP subsystem
interconnect-names:
items:
- const: memory
- const: imem
- const: config
qcom,smem-states:
$ref: /schemas/types.yaml#/definitions/phandle-array
description: State bits used in by the AP to signal the modem.
items:
- description: Whether the "ipa-clock-enabled" state bit is valid
- description: Whether the IPA clock is enabled (if valid)
qcom,smem-state-names:
$ref: /schemas/types.yaml#/definitions/string-array
description: The names of the state bits used for SMP2P output
items:
- const: ipa-clock-enabled-valid
- const: ipa-clock-enabled
modem-init:
type: boolean
description:
If present, it indicates that the modem is responsible for
performing early IPA initialization, including loading and
validating firwmare used by the GSI.
memory-region:
maxItems: 1
description:
If present, a phandle for a reserved memory area that holds
the firmware passed to Trust Zone for authentication. Required
when Trust Zone (not the modem) performs early initialization.
firmware-name:
$ref: /schemas/types.yaml#/definitions/string
description:
If present, name (or relative path) of the file within the
firmware search path containing the firmware image used when
initializing IPA hardware. Optional, and only used when
Trust Zone performs early initialization.
required:
- compatible
- iommus
- reg
- clocks
- interrupts
- interconnects
- qcom,smem-states
# Either modem-init is present, or memory-region must be present.
oneOf:
- required:
- modem-init
- required:
- memory-region
# If memory-region is present, firmware-name may optionally be present.
# But if modem-init is present, firmware-name must not be present.
if:
required:
- modem-init
then:
not:
required:
- firmware-name
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/qcom,rpmh.h>
#include <dt-bindings/interconnect/qcom,sdm845.h>
smp2p-mpss {
compatible = "qcom,smp2p";
ipa_smp2p_out: ipa-ap-to-modem {
qcom,entry-name = "ipa";
#qcom,smem-state-cells = <1>;
};
ipa_smp2p_in: ipa-modem-to-ap {
qcom,entry-name = "ipa";
interrupt-controller;
#interrupt-cells = <2>;
};
};
ipa@1e40000 {
compatible = "qcom,sdm845-ipa";
modem-init;
iommus = <&apps_smmu 0x720 0x3>;
reg = <0x1e40000 0x7000>,
<0x1e47000 0x2000>,
<0x1e04000 0x2c000>;
reg-names = "ipa-reg",
"ipa-shared",
"gsi";
interrupts-extended = <&intc GIC_SPI 311 IRQ_TYPE_EDGE_RISING>,
<&intc GIC_SPI 432 IRQ_TYPE_LEVEL_HIGH>,
<&ipa_smp2p_in 0 IRQ_TYPE_EDGE_RISING>,
<&ipa_smp2p_in 1 IRQ_TYPE_EDGE_RISING>;
interrupt-names = "ipa",
"gsi",
"ipa-clock-query",
"ipa-setup-ready";
clocks = <&rpmhcc RPMH_IPA_CLK>;
clock-names = "core";
interconnects =
<&rsc_hlos MASTER_IPA &rsc_hlos SLAVE_EBI1>,
<&rsc_hlos MASTER_IPA &rsc_hlos SLAVE_IMEM>,
<&rsc_hlos MASTER_APPSS_PROC &rsc_hlos SLAVE_IPA_CFG>;
interconnect-names = "memory",
"imem",
"config";
qcom,smem-states = <&ipa_smp2p_out 0>,
<&ipa_smp2p_out 1>;
qcom,smem-state-names = "ipa-clock-enabled-valid",
"ipa-clock-enabled";
};
|
