linux-hardening - Re: [PATCH v6 4/6] arm64: dts: qcom: sm6125: Add UFS nodes

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Date:   Tue, 10 Jan 2023 23:53:31 -0300
From:   Lux Aliaga <they@...t.lgbt>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, agross@...nel.org,
        andersson@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, vkoul@...nel.org,
        kishon@...nel.org, alim.akhtar@...sung.com, avri.altman@....com,
        bvanassche@....org, keescook@...omium.org, tony.luck@...el.com,
        gpiccoli@...lia.com
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-scsi@...r.kernel.org, linux-hardening@...r.kernel.org,
        phone-devel@...r.kernel.org, martin.botka@...ainline.org,
        marijn.suijten@...ainline.org
Subject: Re: [PATCH v6 4/6] arm64: dts: qcom: sm6125: Add UFS nodes


On 09/01/2023 09:18, Konrad Dybcio wrote:
>
> On 8.01.2023 20:53, Lux Aliaga wrote:
>> Adds a UFS host controller node and its corresponding PHY to
>> the sm6125 platform.
>>
>> Signed-off-by: Lux Aliaga <they@...t.lgbt>
>> ---
>>   arch/arm64/boot/dts/qcom/sm6125.dtsi | 57 ++++++++++++++++++++++++++++
>>   1 file changed, 57 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sm6125.dtsi b/arch/arm64/boot/dts/qcom/sm6125.dtsi
>> index df5453fcf2b9..cec7071d5279 100644
>> --- a/arch/arm64/boot/dts/qcom/sm6125.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sm6125.dtsi
>> @@ -511,6 +511,63 @@ sdhc_2: mmc@...4000 {
>>   			status = "disabled";
>>   		};
>>   
>> +		ufs_mem_hc: ufs@...4000 {
>> +			compatible = "qcom,sm6125-ufshc", "qcom,ufshc", "jedec,ufs-2.0";
>> +			reg = <0x04804000 0x3000>, <0x04810000 0x8000>;
> You need reg-names for ICE to probe, otherwise the second reg sits unused.
>
>> +			interrupts = <GIC_SPI 356 IRQ_TYPE_LEVEL_HIGH>;
>> +			phys = <&ufs_mem_phy>;
>> +			phy-names = "ufsphy";
>> +			lanes-per-direction = <1>;
>> +			#reset-cells = <1>;
>> +			resets = <&gcc GCC_UFS_PHY_BCR>;
>> +			reset-names = "rst";
>> +			iommus = <&apps_smmu 0x200 0x0>;
>> +
>> +			clock-names = "core_clk",
>> +				      "bus_aggr_clk",
>> +				      "iface_clk",
>> +				      "core_clk_unipro",
>> +				      "ref_clk",
>> +				      "tx_lane0_sync_clk",
>> +				      "rx_lane0_sync_clk",
>> +				      "ice_core_clk";
>> +			clocks = <&gcc GCC_UFS_PHY_AXI_CLK>,
>> +				 <&gcc GCC_SYS_NOC_UFS_PHY_AXI_CLK>,
>> +				 <&gcc GCC_UFS_PHY_AHB_CLK>,
>> +				 <&gcc GCC_UFS_PHY_UNIPRO_CORE_CLK>,
>> +				 <&rpmcc RPM_SMD_XO_CLK_SRC>,
>> +				 <&gcc GCC_UFS_PHY_TX_SYMBOL_0_CLK>,
>> +				 <&gcc GCC_UFS_PHY_RX_SYMBOL_0_CLK>,
>> +				 <&gcc GCC_UFS_PHY_ICE_CORE_CLK>;
>> +			freq-table-hz = <50000000 240000000>,
>> +					<0 0>,
>> +					<0 0>,
>> +					<37500000 150000000>,
>> +					<0 0>,
>> +					<0 0>,
>> +					<0 0>,
>> +					<75000000 300000000>;
>> +
>> +			status = "disabled";
>> +		};
>> +
>> +		ufs_mem_phy: phy@...7000 {
>> +			compatible = "qcom,sm6125-qmp-ufs-phy";
>> +			reg = <0x04807000 0x1c4>;
> Isn't this too small? Downstream says 0xdb8, but it's probably even bigger..
What do you think could help me find the new length of the registers? I 
tried 0x1000 and it probed just fine, but I'm not really sure until what 
extent I could push it.

-- 
Lux Aliaga
https://nixgoat.me/