msm: crypto: Parse smmu context bank details (c603184d) · Commits · e / devices / android_kernel_oneplus_sm8150

Documentation/devicetree/bindings/crypto/msm/qcedev.txt

+27 −0

Original line number	Diff line number	Diff line
		* QCEDEV (QTI Crypto Engine Device)

		[Root level node]
		Crypto Engine
		============
		Required properties:
		- compatible : should be "qcom,qcedev"
		- reg : should contain crypto, BAM register map.
		@@ -24,6 +27,19 @@ Optional properties:
		- iommus : A list of phandle and IOMMU specifier pairs that describe the IOMMU master interfaces of the device.
		- qcom,no-clock-support : indicates clocks are not handled by hlos crypto driver.


		[Second level nodes]
		Context banks
		=============
		Required properties:
		- compatible : should be "qcom,qcedev,context-bank"
		- iommus : A phandle parsed by smmu driver. Number of entries will vary across targets.

		Optional properties:
		- label - string describing iommu domain usage.
		- virtual-addr : start of virtual address pool.
		- virtual-size : size of virtual address pool.

		Example:

		qcom,qcedev@fd440000 {
		@@ -43,4 +59,15 @@ Example:
		<56 512 0 0>,
		<56 512 3936000 393600>,
		qcom,ce-opp-freq = <100000000>;

		qcom_cedev_ns_cb {
		compatible = "qcom,qcedev,context-bank";
		label = "ns_context";
		iommus = <&anoc2_smmu 0x1878>,
		<&anoc2_smmu 0x1879>,
		<&anoc2_smmu 0x187c>,
		<&anoc2_smmu 0x187f>;
		virtual-addr = <0x60000000>;
		virtual-size = <0x00200000>;
		};
		};

drivers/crypto/msm/Makefile

+1 −0

Original line number	Diff line number	Diff line
		obj-$(CONFIG_CRYPTO_DEV_QCOM_MSM_QCE) += qce50.o
		obj-$(CONFIG_CRYPTO_DEV_QCEDEV) += qcedev.o
		obj-$(CONFIG_CRYPTO_DEV_QCEDEV) += qcedev_smmu.o
		obj-$(CONFIG_CRYPTO_DEV_QCRYPTO) += qcrypto.o
		obj-$(CONFIG_CRYPTO_DEV_OTA_CRYPTO) += ota_crypto.o
		obj-$(CONFIG_CRYPTO_DEV_QCOM_ICE) += ice.o

drivers/crypto/msm/qcedev.c

+36 −7

Original line number	Diff line number	Diff line
		@@ -36,6 +36,7 @@
		#include <crypto/hash.h>
		#include "qcedevi.h"
		#include "qce.h"
		#include "qcedev_smmu.h"

		#include <linux/compat.h>
		#include "compat_qcedev.h"
		@@ -64,6 +65,14 @@ static dev_t qcedev_device_no;
		static struct class *driver_class;
		static struct device *class_dev;

		MODULE_DEVICE_TABLE(of, qcedev_match);

		static const struct of_device_id qcedev_match[] = {
		{ .compatible = "qcom,qcedev"},
		{ .compatible = "qcom,qcedev,context-bank"},
		{}
		};

		static int qcedev_control_clocks(struct qcedev_control *podev, bool enable)
		{
		unsigned int control_flag;
		@@ -1863,7 +1872,7 @@ static inline long qcedev_ioctl(struct file *file,
		return err;
		}

		static int qcedev_probe(struct platform_device *pdev)
		static int qcedev_probe_device(struct platform_device *pdev)
		{
		void *handle = NULL;
		int rc = 0;
		@@ -1907,6 +1916,8 @@ static int qcedev_probe(struct platform_device *pdev)
		INIT_LIST_HEAD(&podev->ready_commands);
		podev->active_command = NULL;

		INIT_LIST_HEAD(&podev->context_banks);

		spin_lock_init(&podev->lock);

		tasklet_init(&podev->done_tasklet, req_done, (unsigned long)podev);
		@@ -1965,6 +1976,14 @@ static int qcedev_probe(struct platform_device *pdev)
		podev->platform_support.sha_hmac = platform_support->sha_hmac;
		}

		rc = of_platform_populate(pdev->dev.of_node, qcedev_match,
		NULL, &pdev->dev);
		if (rc) {
		pr_err("%s: err: of_platform_populate failed: %d\n",
		__func__, rc);
		goto exit_qce_close;
		}

		return 0;

		exit_qce_close:
		@@ -1984,7 +2003,23 @@ static int qcedev_probe(struct platform_device *pdev)
		exit_unreg_chrdev_region:
		unregister_chrdev_region(qcedev_device_no, 1);

		podev->bus_scale_handle = 0;
		platform_set_drvdata(pdev, NULL);
		podev->pdev = NULL;
		podev->qce = NULL;

		return rc;
		}

		static int qcedev_probe(struct platform_device *pdev)
		{
		if (of_device_is_compatible(pdev->dev.of_node, "qcom,qcedev"))
		return qcedev_probe_device(pdev);
		else if (of_device_is_compatible(pdev->dev.of_node,
		"qcom,qcedev,context-bank"))
		return qcedev_parse_context_bank(pdev);

		return -EINVAL;
		};

		static int qcedev_remove(struct platform_device *pdev)
		@@ -2055,12 +2090,6 @@ static int qcedev_resume(struct platform_device *pdev)
		return 0;
		}

		static const struct of_device_id qcedev_match[] = {
		{ .compatible = "qcom,qcedev",
		},
		{}
		};

		static struct platform_driver qcedev_plat_driver = {
		.probe = qcedev_probe,
		.remove = qcedev_remove,

drivers/crypto/msm/qcedev_smmu.c

0 → 100644

+141 −0

Original line number	Diff line number	Diff line
		/* Qti (or) Qualcomm Technologies Inc CE device driver.
		*
		* Copyright (c) 2018, 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 <asm/dma-iommu.h>
		#include <linux/dma-mapping.h>
		#include <linux/list.h>
		#include <linux/qcedev.h>
		#include "qcedevi.h"
		#include "qcedev_smmu.h"
		#include "soc/qcom/secure_buffer.h"

		static int qcedev_setup_context_bank(struct context_bank_info *cb,
		struct device *dev)
		{
		int rc = 0;
		int secure_vmid = VMID_INVAL;
		struct bus_type *bus;

		if (!dev \|\| !cb) {
		pr_err("%s err: invalid input params\n", __func__);
		return -EINVAL;
		}
		cb->dev = dev;

		bus = cb->dev->bus;
		if (IS_ERR_OR_NULL(bus)) {
		pr_err("%s err: failed to get bus type\n", __func__);
		rc = PTR_ERR(bus) ?: -ENODEV;
		goto remove_cb;
		}

		cb->mapping = arm_iommu_create_mapping(bus, cb->start_addr, cb->size);
		if (IS_ERR_OR_NULL(cb->mapping)) {
		pr_err("%s err: failed to create mapping\n", __func__);
		rc = PTR_ERR(cb->mapping) ?: -ENODEV;
		goto remove_cb;
		}

		if (cb->is_secure) {
		/* Hardcoded since we only have this vmid.*/
		secure_vmid = VMID_CP_BITSTREAM;
		rc = iommu_domain_set_attr(cb->mapping->domain,
		DOMAIN_ATTR_SECURE_VMID, &secure_vmid);
		if (rc) {
		pr_err("%s err: programming secure vmid failed %s %d\n",
		__func__, dev_name(dev), rc);
		goto release_mapping;
		}
		}

		rc = arm_iommu_attach_device(cb->dev, cb->mapping);
		if (rc) {
		pr_err("%s err: Failed to attach %s - %d\n",
		__func__, dev_name(dev), rc);
		goto release_mapping;
		}

		pr_info("%s Attached %s and create mapping\n", __func__, dev_name(dev));
		pr_info("%s Context Bank name:%s, is_secure:%d, start_addr:%#x\n",
		__func__, cb->name, cb->is_secure, cb->start_addr);
		pr_info("%s size:%#x, dev:%pK, mapping:%pK\n", __func__, cb->size,
		cb->dev, cb->mapping);
		return rc;

		release_mapping:
		arm_iommu_release_mapping(cb->mapping);
		remove_cb:
		return rc;
		}

		int qcedev_parse_context_bank(struct platform_device *pdev)
		{
		struct qcedev_control *podev;
		struct context_bank_info *cb = NULL;
		struct device_node *np = NULL;
		int rc = 0;

		if (!pdev) {
		pr_err("%s err: invalid platform devices\n", __func__);
		return -EINVAL;
		}
		if (!pdev->dev.parent) {
		pr_err("%s err: failed to find a parent for %s\n",
		__func__, dev_name(&pdev->dev));
		return -EINVAL;
		}

		podev = dev_get_drvdata(pdev->dev.parent);
		np = pdev->dev.of_node;
		cb = devm_kzalloc(&pdev->dev, sizeof(*cb), GFP_KERNEL);
		if (!cb) {
		pr_err("%s ERROR = Failed to allocate cb\n", __func__);
		return -ENOMEM;
		}

		INIT_LIST_HEAD(&cb->list);
		list_add_tail(&cb->list, &podev->context_banks);

		rc = of_property_read_string(np, "label", &cb->name);
		if (rc)
		pr_debug("%s ERROR = Unable to read label\n", __func__);

		rc = of_property_read_u32(np, "virtual-addr", &cb->start_addr);
		if (rc) {
		pr_err("%s err: cannot read virtual region addr %d\n",
		__func__, rc);
		goto err_setup_cb;
		}

		rc = of_property_read_u32(np, "virtual-size", &cb->size);
		if (rc) {
		pr_err("%s err: cannot read virtual region size %d\n",
		__func__, rc);
		goto err_setup_cb;
		}

		cb->is_secure = of_property_read_bool(np, "qcom,secure-context-bank");

		rc = qcedev_setup_context_bank(cb, &pdev->dev);
		if (rc) {
		pr_err("%s err: cannot setup context bank %d\n", __func__, rc);
		goto err_setup_cb;
		}

		return 0;

		err_setup_cb:
		devm_kfree(&pdev->dev, cb);
		list_del(&cb->list);
		return rc;
		}

drivers/crypto/msm/qcedev_smmu.h

0 → 100644

+35 −0

Original line number	Diff line number	Diff line
		/* Qti (or) Qualcomm Technologies Inc CE device driver.
		*
		* Copyright (c) 2018, 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 _DRIVERS_CRYPTO_PARSE_H_
		#define _DRIVERS_CRYPTO_PARSE_H_

		#include <linux/of.h>
		#include <linux/of_platform.h>

		struct context_bank_info {
		struct list_head list;
		const char *name;
		u32 buffer_type;
		u32 start_addr;
		u32 size;
		bool is_secure;
		struct device *dev;
		struct dma_iommu_mapping *mapping;
		};

		int qcedev_parse_context_bank(struct platform_device *pdev);

		#endif