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Date: Tue, 15 Nov 2022 05:31:15 -0600
From: Alex Elder <elder@...aro.org>
To: robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
pabeni@...hat.com
Cc: andersson@...nel.org, konrad.dybcio@...aro.org, agross@...nel.org,
elder@...nel.org, linux-arm-msm@...r.kernel.org,
netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH net-next v2 1/5] dt-bindings: net: qcom,ipa: deprecate modem-init
GSI firmware for IPA must be loaded during initialization, either by
the AP or by the modem. The loader is currently specified based on
whether the Boolean modem-init property is present.
Instead, use a new property with an enumerated value to indicate
explicitly how GSI firmware gets loaded. With this in place, a
third approach can be added in an upcoming patch.
The new qcom,gsi-loader property has two defined values:
- self: The AP loads GSI firmware
- modem: The modem loads GSI firmware
The modem-init property must still be supported, but is now marked
deprecated.
Update the example so it represents the SC7180 SoC, and provide
examples for the qcom,gsi-loader, memory-region, and firmware-name
properties.
Signed-off-by: Alex Elder <elder@...aro.org>
---
v2: Updated description, switched example completely to SC7180.
.../devicetree/bindings/net/qcom,ipa.yaml | 76 ++++++++++++++-----
1 file changed, 55 insertions(+), 21 deletions(-)
diff --git a/Documentation/devicetree/bindings/net/qcom,ipa.yaml b/Documentation/devicetree/bindings/net/qcom,ipa.yaml
index e752b76192df0..d0f34763b9383 100644
--- a/Documentation/devicetree/bindings/net/qcom,ipa.yaml
+++ b/Documentation/devicetree/bindings/net/qcom,ipa.yaml
@@ -124,19 +124,29 @@ properties:
- const: ipa-clock-enabled-valid
- const: ipa-clock-enabled
+ qcom,gsi-loader:
+ enum:
+ - self
+ - modem
+ description:
+ Indicates how GSI firmware should be loaded. If the AP loads
+ and validates GSI firmware, this property has value "self".
+ If the modem does this, this property has value "modem".
+
modem-init:
+ deprecated: true
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.
+ This is the older (deprecated) way of indicating how GSI firmware
+ should be loaded. If present, the modem loads GSI firmware; if
+ absent, the AP loads GSI firmware.
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.
+ when the AP (not the modem) performs early initialization.
firmware-name:
$ref: /schemas/types.yaml#/definitions/string
@@ -155,15 +165,36 @@ required:
- interconnects
- qcom,smem-states
-# If modem-init is not present, the AP loads GSI firmware, and
-# memory-region must be specified
-if:
- not:
- required:
- - modem-init
-then:
- required:
- - memory-region
+allOf:
+ # If qcom,gsi-loader is present, modem-init must not be present
+ - if:
+ required:
+ - qcom,gsi-loader
+ then:
+ properties:
+ modem-init: false
+
+ # If qcom,gsi-loader is "self", the AP loads GSI firmware, and
+ # memory-region must be specified
+ if:
+ properties:
+ qcom,gsi-loader:
+ contains:
+ const: self
+ then:
+ required:
+ - memory-region
+ else:
+ # If qcom,gsi-loader is not present, we use deprecated behavior.
+ # If modem-init is not present, the AP loads GSI firmware, and
+ # memory-region must be specified.
+ if:
+ not:
+ required:
+ - modem-init
+ then:
+ required:
+ - memory-region
additionalProperties: false
@@ -194,14 +225,17 @@ examples:
};
ipa@...0000 {
- compatible = "qcom,sdm845-ipa";
+ compatible = "qcom,sc7180-ipa";
- modem-init;
+ qcom,gsi-loader = "self";
+ memory-region = <&ipa_fw_mem>;
+ firmware-name = "qcom/sc7180-trogdor/modem/modem.mdt";
- iommus = <&apps_smmu 0x720 0x3>;
+ iommus = <&apps_smmu 0x440 0x0>,
+ <&apps_smmu 0x442 0x0>;
reg = <0x1e40000 0x7000>,
- <0x1e47000 0x2000>,
- <0x1e04000 0x2c000>;
+ <0x1e47000 0x2000>,
+ <0x1e04000 0x2c000>;
reg-names = "ipa-reg",
"ipa-shared",
"gsi";
@@ -219,9 +253,9 @@ examples:
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>;
+ <&aggre2_noc MASTER_IPA 0 &mc_virt SLAVE_EBI1 0>,
+ <&aggre2_noc MASTER_IPA 0 &system_noc SLAVE_IMEM 0>,
+ <&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_IPA_CFG 0>;
interconnect-names = "memory",
"imem",
"config";
--
2.34.1
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