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Commit 68d9da80 authored by Chintan Pandya's avatar Chintan Pandya
Browse files

iommu: msm: Support different implementations 



Within SMMUv2, different implementation have
different Software interface. Support IOMMU
driver to be compatible with MMU-500.

Change-Id: I7d18c5aad82acafa317fe95b021e29b992a082be
Signed-off-by: default avatarChintan Pandya <cpandya@codeaurora.org>
parent 27a70795

Documentation/devicetree/bindings/iommu/msm_iommu_v1.txt

+2 −1
Original line number Diff line number Diff line
@@ -3,6 +3,8 @@ 
Required properties:

- compatible : one of:

	- "qcom,msm-smmu-v1"

	- "qcom,msm-smmu-v2"

	- "qcom,msm-mmu-500"

- reg : - offset and length of the register set for the device.

	- Optional offset and length for clock register for additional clock that

	needs to be turned on for access to this IOMMU.
@@ -31,7 +33,6 @@ Optional properties: 
- qcom,iommu-pmu-ncounters: Number of PMU counters per group.

- qcom,iommu-pmu-event-classes: List of event classes supported.

- Bus scaling properties: See msm_bus.txt

- qcom,no-atos-support: boolean indicating that IOMMU doesn't have ATS support

- qcom,cb-base-offset: context bank 0's base address from global base address



- List of sub nodes, one for each of the translation context banks supported.

drivers/iommu/msm_iommu-v1.c

+1 −1
Original line number Diff line number Diff line
@@ -1058,7 +1058,7 @@ static phys_addr_t msm_iommu_iova_to_phys(struct iommu_domain *domain, 
				 struct msm_iommu_ctx_drvdata, attached_elm);

	iommu_drvdata = dev_get_drvdata(ctx_drvdata->pdev->dev.parent);



	if (iommu_drvdata->no_atos_support) {

	if (iommu_drvdata->model == MMU_500) {

		ret = msm_iommu_iova_to_phys_soft(domain, va);

		mutex_unlock(&msm_iommu_lock);

		return ret;

drivers/iommu/msm_iommu_dev-v1.c

+6 −5
Original line number Diff line number Diff line
@@ -341,6 +341,9 @@ static int msm_iommu_probe(struct platform_device *pdev) 


	drvdata->glb_base = drvdata->base;



	if (of_device_is_compatible(pdev->dev.of_node, "qcom,msm-mmu-500"))

		drvdata->model = MMU_500;



	if (of_get_property(pdev->dev.of_node, "vdd-supply", NULL)) {



		drvdata->gdsc = devm_regulator_get(&pdev->dev, "vdd");
@@ -379,9 +382,6 @@ static int msm_iommu_probe(struct platform_device *pdev) 
			return PTR_ERR(drvdata->aiclk);

	}



	drvdata->no_atos_support = of_property_read_bool(pdev->dev.of_node,

						"qcom,no-atos-support");



	if (!of_property_read_u32(pdev->dev.of_node,

				"qcom,cb-base-offset",

				&temp))
@@ -408,8 +408,9 @@ static int msm_iommu_probe(struct platform_device *pdev) 
	if (ret)

		return ret;



	dev_info(&pdev->dev, "device %s mapped at %p, with %d ctx banks\n",

		drvdata->name, drvdata->base, drvdata->ncb);

	dev_info(&pdev->dev,

		"device %s (model: %d) mapped at %p, with %d ctx banks\n",

		drvdata->name, drvdata->model, drvdata->base, drvdata->ncb);



	platform_set_drvdata(pdev, drvdata);

include/linux/qcom_iommu.h

+8 −1
Original line number Diff line number Diff line
@@ -135,7 +135,7 @@ struct msm_iommu_drvdata { 
	unsigned int bus_client;

	int needs_rem_spinlock;

	int powered_on;

	int no_atos_support;

	unsigned int model;

};



/**
@@ -229,6 +229,13 @@ enum dump_reg_type { 
	DRT_GLOBAL_REG_N,

};



enum model_id {

	QSMMUv1 = 1,

	QSMMUv2,

	MMU_500 = 500,

	MAX_MODEL,

};



struct dump_regs_tbl_entry {

	/*

	 * To keep things context-bank-agnostic, we only store the