[PATCH v3] iommu/arm-smmu-qcom: hook up qcom_smmu_impl for ACPI boot

[PATCH v3] iommu/arm-smmu-qcom: hook up qcom_smmu_impl for ACPI boot

[Shawn Guo]

The hookup with qcom_smmu_impl is required to do ACPI boot on SC8180X
based devices like Lenovo Flex 5G laptop and Microsoft Surface Pro X.
Define acpi_platform_list for these platforms and match them using
acpi_match_platform_list() call, and create qcom_smmu_impl accordingly.

(np == NULL) is used to check ACPI boot, because fwnode of SMMU device
is a static allocation and thus helpers like has_acpi_companion() don't
work here.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
Changes for v3:
 - Call acpi_match_platform_list() to match platform in qcom smmu
   driver rather than IORT code.

Changes for v2:
 - Rather than using asl_compiler_id in IORT table, follow suggestion
   from Robin Murphy to use acpi_match_platform_list() to match platform.

 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index 98b3a1c2a181..f7e187f3fa66 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2019, The Linux Foundation. All rights reserved.
  */
 
+#include <linux/acpi.h>
 #include <linux/adreno-smmu-priv.h>
 #include <linux/of_device.h>
 #include <linux/qcom_scm.h>
@@ -339,10 +340,22 @@ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
 	{ }
 };
 
+static struct acpi_platform_list qcom_acpi_platlist[] = {
+	{ "LENOVO", "CB-01   ", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
+	{ "QCOM  ", "QCOMEDK2", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
+	{ }
+};
+
 struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
 {
 	const struct device_node *np = smmu->dev->of_node;
 
+	if (np == NULL) {
+		/* Match platform for ACPI boot */
+		if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
+			return qcom_smmu_create(smmu, &qcom_smmu_impl);
+	}
+
 	if (of_match_node(qcom_smmu_impl_of_match, np))
 		return qcom_smmu_create(smmu, &qcom_smmu_impl);
 
-- 
2.17.1


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Re: [PATCH v3] iommu/arm-smmu-qcom: hook up qcom_smmu_impl for ACPI boot

[Shawn Guo]

On Sun, May 09, 2021 at 10:26:07AM +0800, Shawn Guo wrote:
> The hookup with qcom_smmu_impl is required to do ACPI boot on SC8180X
> based devices like Lenovo Flex 5G laptop and Microsoft Surface Pro X.
> Define acpi_platform_list for these platforms and match them using
> acpi_match_platform_list() call, and create qcom_smmu_impl accordingly.
> 
> (np == NULL) is used to check ACPI boot, because fwnode of SMMU device
> is a static allocation and thus helpers like has_acpi_companion() don't
> work here.
> 
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> ---
> Changes for v3:
>  - Call acpi_match_platform_list() to match platform in qcom smmu
>    driver rather than IORT code.

Hi Robin,

How does this version look?

Shawn

> 
> Changes for v2:
>  - Rather than using asl_compiler_id in IORT table, follow suggestion
>    from Robin Murphy to use acpi_match_platform_list() to match platform.
> 
>  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> index 98b3a1c2a181..f7e187f3fa66 100644
> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> @@ -3,6 +3,7 @@
>   * Copyright (c) 2019, The Linux Foundation. All rights reserved.
>   */
>  
> +#include <linux/acpi.h>
>  #include <linux/adreno-smmu-priv.h>
>  #include <linux/of_device.h>
>  #include <linux/qcom_scm.h>
> @@ -339,10 +340,22 @@ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
>  	{ }
>  };
>  
> +static struct acpi_platform_list qcom_acpi_platlist[] = {
> +	{ "LENOVO", "CB-01   ", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
> +	{ "QCOM  ", "QCOMEDK2", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
> +	{ }
> +};
> +
>  struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
>  {
>  	const struct device_node *np = smmu->dev->of_node;
>  
> +	if (np == NULL) {
> +		/* Match platform for ACPI boot */
> +		if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
> +			return qcom_smmu_create(smmu, &qcom_smmu_impl);
> +	}
> +
>  	if (of_match_node(qcom_smmu_impl_of_match, np))
>  		return qcom_smmu_create(smmu, &qcom_smmu_impl);
>  
> -- 
> 2.17.1
> 

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Re: [PATCH v3] iommu/arm-smmu-qcom: hook up qcom_smmu_impl for ACPI boot

[Robin Murphy]

On 2021-05-23 07:05, Shawn Guo wrote:
> On Sun, May 09, 2021 at 10:26:07AM +0800, Shawn Guo wrote:
>> The hookup with qcom_smmu_impl is required to do ACPI boot on SC8180X
>> based devices like Lenovo Flex 5G laptop and Microsoft Surface Pro X.
>> Define acpi_platform_list for these platforms and match them using
>> acpi_match_platform_list() call, and create qcom_smmu_impl accordingly.
>>
>> (np == NULL) is used to check ACPI boot, because fwnode of SMMU device
>> is a static allocation and thus helpers like has_acpi_companion() don't
>> work here.
>>
>> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
>> ---
>> Changes for v3:
>>   - Call acpi_match_platform_list() to match platform in qcom smmu
>>     driver rather than IORT code.
> 
> Hi Robin,
> 
> How does this version look?

So good that I glanced at it, thought "nice!", then having no remaining 
concerns promptly moved on to something else forgot about it. Sorry 
about that!

Reviewed-by: Robin Murphy <robin.murphy@arm.com>

Cheers,
Robin.

> Shawn
> 
>>
>> Changes for v2:
>>   - Rather than using asl_compiler_id in IORT table, follow suggestion
>>     from Robin Murphy to use acpi_match_platform_list() to match platform.
>>
>>   drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 13 +++++++++++++
>>   1 file changed, 13 insertions(+)
>>
>> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> index 98b3a1c2a181..f7e187f3fa66 100644
>> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> @@ -3,6 +3,7 @@
>>    * Copyright (c) 2019, The Linux Foundation. All rights reserved.
>>    */
>>   
>> +#include <linux/acpi.h>
>>   #include <linux/adreno-smmu-priv.h>
>>   #include <linux/of_device.h>
>>   #include <linux/qcom_scm.h>
>> @@ -339,10 +340,22 @@ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
>>   	{ }
>>   };
>>   
>> +static struct acpi_platform_list qcom_acpi_platlist[] = {
>> +	{ "LENOVO", "CB-01   ", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
>> +	{ "QCOM  ", "QCOMEDK2", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
>> +	{ }
>> +};
>> +
>>   struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
>>   {
>>   	const struct device_node *np = smmu->dev->of_node;
>>   
>> +	if (np == NULL) {
>> +		/* Match platform for ACPI boot */
>> +		if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
>> +			return qcom_smmu_create(smmu, &qcom_smmu_impl);
>> +	}
>> +
>>   	if (of_match_node(qcom_smmu_impl_of_match, np))
>>   		return qcom_smmu_create(smmu, &qcom_smmu_impl);
>>   
>> -- 
>> 2.17.1
>>

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Re: [PATCH v3] iommu/arm-smmu-qcom: hook up qcom_smmu_impl for ACPI boot

[Bjorn Andersson]

On Sat 08 May 21:26 CDT 2021, Shawn Guo wrote:

> The hookup with qcom_smmu_impl is required to do ACPI boot on SC8180X
> based devices like Lenovo Flex 5G laptop and Microsoft Surface Pro X.
> Define acpi_platform_list for these platforms and match them using
> acpi_match_platform_list() call, and create qcom_smmu_impl accordingly.
> 
> (np == NULL) is used to check ACPI boot, because fwnode of SMMU device
> is a static allocation and thus helpers like has_acpi_companion() don't
> work here.
> 

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> ---
> Changes for v3:
>  - Call acpi_match_platform_list() to match platform in qcom smmu
>    driver rather than IORT code.
> 
> Changes for v2:
>  - Rather than using asl_compiler_id in IORT table, follow suggestion
>    from Robin Murphy to use acpi_match_platform_list() to match platform.
> 
>  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> index 98b3a1c2a181..f7e187f3fa66 100644
> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> @@ -3,6 +3,7 @@
>   * Copyright (c) 2019, The Linux Foundation. All rights reserved.
>   */
>  
> +#include <linux/acpi.h>
>  #include <linux/adreno-smmu-priv.h>
>  #include <linux/of_device.h>
>  #include <linux/qcom_scm.h>
> @@ -339,10 +340,22 @@ static const struct of_device_id __maybe_unused qcom_smmu_impl_of_match[] = {
>  	{ }
>  };
>  
> +static struct acpi_platform_list qcom_acpi_platlist[] = {
> +	{ "LENOVO", "CB-01   ", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
> +	{ "QCOM  ", "QCOMEDK2", 0x8180, ACPI_SIG_IORT, equal, "QCOM SMMU" },
> +	{ }
> +};
> +
>  struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
>  {
>  	const struct device_node *np = smmu->dev->of_node;
>  
> +	if (np == NULL) {
> +		/* Match platform for ACPI boot */
> +		if (acpi_match_platform_list(qcom_acpi_platlist) >= 0)
> +			return qcom_smmu_create(smmu, &qcom_smmu_impl);
> +	}
> +
>  	if (of_match_node(qcom_smmu_impl_of_match, np))
>  		return qcom_smmu_create(smmu, &qcom_smmu_impl);
>  
> -- 
> 2.17.1
> 

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Re: [PATCH v3] iommu/arm-smmu-qcom: hook up qcom_smmu_impl for ACPI boot

[Will Deacon]

On Sun, 9 May 2021 10:26:07 +0800, Shawn Guo wrote:
> The hookup with qcom_smmu_impl is required to do ACPI boot on SC8180X
> based devices like Lenovo Flex 5G laptop and Microsoft Surface Pro X.
> Define acpi_platform_list for these platforms and match them using
> acpi_match_platform_list() call, and create qcom_smmu_impl accordingly.
> 
> (np == NULL) is used to check ACPI boot, because fwnode of SMMU device
> is a static allocation and thus helpers like has_acpi_companion() don't
> work here.

Applied to will (for-joerg/arm-smmu/updates), thanks!

[1/1] iommu/arm-smmu-qcom: hook up qcom_smmu_impl for ACPI boot
      https://git.kernel.org/will/c/a51627c5df58

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev

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