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Commit 3c6359a1 authored by Mulu He's avatar Mulu He Committed by Gerrit - the friendly Code Review server
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coresight: tmc: Add SMMU S1 bypass support 



Support configurate smmu bypass mode via dts.

Change-Id: Ia176392338b736c9aa6f826a7d8be0fad5121acf
Signed-off-by: default avatarMulu He <muluhe@codeaurora.org>
parent 89708a1a

drivers/hwtracing/coresight/coresight-tmc.c

+11 −0
Original line number Original line Diff line number Diff line
@@ -450,6 +450,7 @@ static DEVICE_ATTR_RW(block_size); 
static int tmc_iommu_init(struct tmc_drvdata *drvdata)

static int tmc_iommu_init(struct tmc_drvdata *drvdata)

{

{

	struct device_node *node = drvdata->dev->of_node;

	struct device_node *node = drvdata->dev->of_node;

	int s1_bypass;

	int ret = 0;

	int ret = 0;





	if (!of_property_read_bool(node, "iommus"))

	if (!of_property_read_bool(node, "iommus"))
@@ -463,6 +464,15 @@ static int tmc_iommu_init(struct tmc_drvdata *drvdata) 
		goto iommu_map_err;

		goto iommu_map_err;

	}

	}





	s1_bypass = of_property_read_bool(node, "qcom,smmu-s1-bypass");

	ret = iommu_domain_set_attr(drvdata->iommu_mapping->domain,

			DOMAIN_ATTR_S1_BYPASS, &s1_bypass);

	if (ret) {

		dev_err(drvdata->dev, "IOMMU set s1 bypass (%d) failed (%d)\n",

			s1_bypass, ret);

		goto iommu_attach_fail;

	}



	ret = arm_iommu_attach_device(drvdata->dev, drvdata->iommu_mapping);

	ret = arm_iommu_attach_device(drvdata->dev, drvdata->iommu_mapping);

	if (ret) {

	if (ret) {

		dev_err(drvdata->dev, "Attach device failed, err = %d\n", ret);

		dev_err(drvdata->dev, "Attach device failed, err = %d\n", ret);
@@ -474,6 +484,7 @@ static int tmc_iommu_init(struct tmc_drvdata *drvdata) 
iommu_attach_fail:

iommu_attach_fail:

	arm_iommu_release_mapping(drvdata->iommu_mapping);

	arm_iommu_release_mapping(drvdata->iommu_mapping);

iommu_map_err:

iommu_map_err:

	drvdata->iommu_mapping = NULL;

	return ret;

	return ret;

}

}