Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b6fde413 authored by Mitchel Humpherys's avatar Mitchel Humpherys Committed by Matt Wagantall
Browse files

soc: qcom: add library for SMMU TZ interface 



Some targets require calling into TZ for various bits of SMMU
configuration.  Add a library to provide a clean interface for such
configuration.

Change-Id: I1dc5cd21d4a09e321039d69cc760eaf6f356c6cf
Signed-off-by: default avatarMitchel Humpherys <mitchelh@codeaurora.org>
parent 989471cc

Documentation/devicetree/bindings/iommu/arm,smmu.txt

+3 −0
Original line number Diff line number Diff line
@@ -79,6 +79,9 @@ conditions. 
                  address size faults are due to a fundamental programming

                  error from which we don't care about recovering anyways.



- qcom,tz-device-id : A string indicating the device ID for this SMMU known

                  to TZ.  See msm_tz_smmu.c for a full list of mappings.



- clocks        : List of clocks to be used during SMMU register access. See

                  Documentation/devicetree/bindings/clock/clock-bindings.txt

                  for information about the format. For each clock specified

drivers/soc/qcom/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -293,4 +293,14 @@ config MSM_GLINK_PKT 
	  This enable the usersapce clients to read and write to

	  some glink packets channel.



config MSM_TZ_SMMU

	bool "Helper functions for SMMU configuration through TZ"

	depends on ARCH_MSMTHULIUM

	help

	  Say 'Y' here for targets that need to call into TZ to configure

	  SMMUs for any reason (for example, for errata workarounds or

	  configuration of SMMU virtualization).



	  If unsure, say N.



endif # ARCH_MSM

drivers/soc/qcom/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -35,3 +35,4 @@ obj-$(CONFIG_MSM_IPC_ROUTER_GLINK_XPRT) += ipc_router_glink_xprt.o 
obj-$(CONFIG_MSM_SYSTEM_HEALTH_MONITOR) += system_health_monitor_v01.o

obj-$(CONFIG_MSM_SYSTEM_HEALTH_MONITOR) += system_health_monitor.o

obj-$(CONFIG_MSM_GLINK_PKT) += msm_glink_pkt.o

obj-$(CONFIG_MSM_TZ_SMMU) += msm_tz_smmu.o

drivers/soc/qcom/msm_tz_smmu.c

0 → 100644
+139 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2015, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#include <linux/kernel.h>

#include <linux/device.h>

#include <linux/of.h>

#include <soc/qcom/scm.h>

#include <soc/qcom/msm_tz_smmu.h>



enum tz_smmu_device_id {

	TZ_DEVICE_START = 0,

	TZ_DEVICE_VIDEO = 0,

	TZ_DEVICE_MDSS,

	TZ_DEVICE_LPASS,

	TZ_DEVICE_MDSS_BOOT,

	TZ_DEVICE_USB1_HS,

	TZ_DEVICE_OCMEM,

	TZ_DEVICE_LPASS_CORE,

	TZ_DEVICE_VPU,

	TZ_DEVICE_COPSS_SMMU,

	TZ_DEVICE_USB3_0,

	TZ_DEVICE_USB3_1,

	TZ_DEVICE_PCIE_0,

	TZ_DEVICE_PCIE_1,

	TZ_DEVICE_BCSS,

	TZ_DEVICE_VCAP,

	TZ_DEVICE_PCIE20,

	TZ_DEVICE_IPA,

	TZ_DEVICE_APPS,

	TZ_DEVICE_GPU,

	TZ_DEVICE_UFS,

	TZ_DEVICE_ICE,

	TZ_DEVICE_ROT,

	TZ_DEVICE_VFE,

	TZ_DEVICE_ANOC0,

	TZ_DEVICE_ANOC1,

	TZ_DEVICE_ANOC2,

	TZ_DEVICE_CPP,

	TZ_DEVICE_JPEG,

	TZ_DEVICE_MAX,

};



static const char * const device_id_mappings[] = {

	[TZ_DEVICE_VIDEO] = "VIDEO",

	[TZ_DEVICE_MDSS] = "MDSS",

	[TZ_DEVICE_LPASS] = "LPASS",

	[TZ_DEVICE_MDSS_BOOT] = "MDSS_BOOT",

	[TZ_DEVICE_USB1_HS] = "USB1_HS",

	[TZ_DEVICE_OCMEM] = "OCMEM",

	[TZ_DEVICE_LPASS_CORE] = "LPASS_CORE",

	[TZ_DEVICE_VPU] = "VPU",

	[TZ_DEVICE_COPSS_SMMU] = "COPSS_SMMU",

	[TZ_DEVICE_USB3_0] = "USB3_0",

	[TZ_DEVICE_USB3_1] = "USB3_1",

	[TZ_DEVICE_PCIE_0] = "PCIE_0",

	[TZ_DEVICE_PCIE_1] = "PCIE_1",

	[TZ_DEVICE_BCSS] = "BCSS",

	[TZ_DEVICE_VCAP] = "VCAP",

	[TZ_DEVICE_PCIE20] = "PCIE20",

	[TZ_DEVICE_IPA] = "IPA",

	[TZ_DEVICE_APPS] = "APPS",

	[TZ_DEVICE_GPU] = "GPU",

	[TZ_DEVICE_UFS] = "UFS",

	[TZ_DEVICE_ICE] = "ICE",

	[TZ_DEVICE_ROT] = "ROT",

	[TZ_DEVICE_VFE] = "VFE",

	[TZ_DEVICE_ANOC0] = "ANOC0",

	[TZ_DEVICE_ANOC1] = "ANOC1",

	[TZ_DEVICE_ANOC2] = "ANOC2",

	[TZ_DEVICE_CPP] = "CPP",

	[TZ_DEVICE_JPEG] = "JPEG",

};



#define MAX_DEVICE_ID_NAME_LEN 20



#define TZ_SMMU_PREPARE_ATOS_ID 0x21

#define TZ_SMMU_ATOS_START 1

#define TZ_SMMU_ATOS_END 0



static enum tz_smmu_device_id __dev_to_device_id(struct device *dev)

{

	const char *device_id;

	enum tz_smmu_device_id iter;



	if (of_property_read_string(dev->of_node, "qcom,tz-device-id",

					    &device_id)) {

		dev_err(dev, "no qcom,device-id property\n");

		return TZ_DEVICE_MAX;

	}



	for (iter = TZ_DEVICE_START; iter < TZ_DEVICE_MAX; iter++)

		if (!strcmp(device_id_mappings[iter], device_id))

			return iter;



	return TZ_DEVICE_MAX;

}



static int __msm_tz_smmu_atos(struct device *dev, int cb_num, int operation)

{

	int ret;

	struct scm_desc desc = {0};

	enum tz_smmu_device_id devid = __dev_to_device_id(dev);



	if (devid == TZ_DEVICE_MAX)

		return -ENODEV;



	desc.args[0] = devid;

	desc.args[1] = cb_num;

	desc.args[2] = operation;

	desc.arginfo = SCM_ARGS(3, SCM_VAL, SCM_VAL, SCM_VAL);



	ret = scm_call2(SCM_SIP_FNID(SCM_SVC_MP, TZ_SMMU_PREPARE_ATOS_ID),

			&desc);

	if (ret)

		pr_info("%s: TZ SMMU ATOS %s failed, ret = %d\n",

			__func__,

			operation == TZ_SMMU_ATOS_START ? "start" : "end",

			ret);

	return ret;

}



int msm_tz_smmu_atos_start(struct device *dev, int cb_num)

{

	return __msm_tz_smmu_atos(dev, cb_num, TZ_SMMU_ATOS_START);

}



int msm_tz_smmu_atos_end(struct device *dev, int cb_num)

{

	return __msm_tz_smmu_atos(dev, cb_num, TZ_SMMU_ATOS_END);

}

include/soc/qcom/msm_tz_smmu.h

0 → 100644
+37 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2015, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#ifndef __MSM_TZ_SMMU_H__

#define __MSM_TZ_SMMU_H__



#include <linux/device.h>



#ifdef CONFIG_MSM_TZ_SMMU



int msm_tz_smmu_atos_start(struct device *dev, int cb_num);

int msm_tz_smmu_atos_end(struct device *dev, int cb_num);



#else



static inline int msm_tz_smmu_atos_start(struct device *dev, int cb_num)

{

	return 0;

}



static inline int msm_tz_smmu_atos_end(struct device *dev, int cb_num)

{

	return 0;

}



#endif /* CONFIG_MSM_TZ_SMMU */



#endif /* __MSM_TZ_SMMU_H__ */