Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index dac895d..59f2528 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
#
# Hardware Random Number Generator (RNG) configuration
#
@@ -424,6 +425,21 @@
will be called exynos-trng.
If unsure, say Y.
+
+config HW_RANDOM_OPTEE
+ tristate "OP-TEE based Random Number Generator support"
+ depends on OPTEE
+ default HW_RANDOM
+ help
+ This driver provides support for OP-TEE based Random Number
+ Generator on ARM SoCs where hardware entropy sources are not
+ accessible to normal world (Linux).
+
+ To compile this driver as a module, choose M here: the module
+ will be called optee-rng.
+
+ If unsure, say Y.
+
endif # HW_RANDOM
config UML_RANDOM
diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile
index e35ec3c..7c9ef4a 100644
--- a/drivers/char/hw_random/Makefile
+++ b/drivers/char/hw_random/Makefile
@@ -38,3 +38,4 @@
obj-$(CONFIG_HW_RANDOM_MTK) += mtk-rng.o
obj-$(CONFIG_HW_RANDOM_S390) += s390-trng.o
obj-$(CONFIG_HW_RANDOM_KEYSTONE) += ks-sa-rng.o
+obj-$(CONFIG_HW_RANDOM_OPTEE) += optee-rng.o
diff --git a/drivers/char/hw_random/atmel-rng.c b/drivers/char/hw_random/atmel-rng.c
index 4334262..e557057 100644
--- a/drivers/char/hw_random/atmel-rng.c
+++ b/drivers/char/hw_random/atmel-rng.c
@@ -86,7 +86,7 @@
trng->rng.name = pdev->name;
trng->rng.read = atmel_trng_read;
- ret = hwrng_register(&trng->rng);
+ ret = devm_hwrng_register(&pdev->dev, &trng->rng);
if (ret)
goto err_register;
@@ -103,7 +103,6 @@
{
struct atmel_trng *trng = platform_get_drvdata(pdev);
- hwrng_unregister(&trng->rng);
atmel_trng_disable(trng);
clk_disable_unprepare(trng->clk);
diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c
index 6767d96..f759790 100644
--- a/drivers/char/hw_random/bcm2835-rng.c
+++ b/drivers/char/hw_random/bcm2835-rng.c
@@ -1,10 +1,7 @@
-/**
+// SPDX-License-Identifier: GPL-2.0
+/*
* Copyright (c) 2010-2012 Broadcom. All rights reserved.
* Copyright (c) 2013 Lubomir Rintel
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License ("GPL")
- * version 2, as published by the Free Software Foundation.
*/
#include <linux/hw_random.h>
@@ -171,14 +168,16 @@
priv->rng.read = bcm2835_rng_read;
priv->rng.cleanup = bcm2835_rng_cleanup;
- rng_id = of_match_node(bcm2835_rng_of_match, np);
- if (!rng_id)
- return -EINVAL;
+ if (dev_of_node(dev)) {
+ rng_id = of_match_node(bcm2835_rng_of_match, np);
+ if (!rng_id)
+ return -EINVAL;
- /* Check for rng init function, execute it */
- of_data = rng_id->data;
- if (of_data)
- priv->mask_interrupts = of_data->mask_interrupts;
+ /* Check for rng init function, execute it */
+ of_data = rng_id->data;
+ if (of_data)
+ priv->mask_interrupts = of_data->mask_interrupts;
+ }
/* register driver */
err = devm_hwrng_register(dev, &priv->rng);
diff --git a/drivers/char/hw_random/cavium-rng-vf.c b/drivers/char/hw_random/cavium-rng-vf.c
index 2d1352b..3de4a6a 100644
--- a/drivers/char/hw_random/cavium-rng-vf.c
+++ b/drivers/char/hw_random/cavium-rng-vf.c
@@ -67,7 +67,7 @@
pci_set_drvdata(pdev, rng);
- ret = hwrng_register(&rng->ops);
+ ret = devm_hwrng_register(&pdev->dev, &rng->ops);
if (ret) {
dev_err(&pdev->dev, "Error registering device as HWRNG.\n");
return ret;
@@ -76,14 +76,6 @@
return 0;
}
-/* Remove the VF */
-static void cavium_rng_remove_vf(struct pci_dev *pdev)
-{
- struct cavium_rng *rng;
-
- rng = pci_get_drvdata(pdev);
- hwrng_unregister(&rng->ops);
-}
static const struct pci_device_id cavium_rng_vf_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, 0xa033), 0, 0, 0},
@@ -95,7 +87,6 @@
.name = "cavium_rng_vf",
.id_table = cavium_rng_vf_id_table,
.probe = cavium_rng_probe_vf,
- .remove = cavium_rng_remove_vf,
};
module_pci_driver(cavium_rng_vf_driver);
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index aaf9e5a..8d53b8e 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -4,7 +4,7 @@
* Copyright 2006 Michael Buesch <m@bues.ch>
* Copyright 2005 (c) MontaVista Software, Inc.
*
- * Please read Documentation/hw_random.txt for details on use.
+ * Please read Documentation/admin-guide/hw_random.rst for details on use.
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
@@ -44,10 +44,10 @@
module_param(current_quality, ushort, 0644);
MODULE_PARM_DESC(current_quality,
- "current hwrng entropy estimation per mill");
+ "current hwrng entropy estimation per 1024 bits of input");
module_param(default_quality, ushort, 0644);
MODULE_PARM_DESC(default_quality,
- "default entropy content of hwrng per mill");
+ "default entropy content of hwrng per 1024 bits of input");
static void drop_current_rng(void);
static int hwrng_init(struct hwrng *rng);
@@ -67,7 +67,7 @@
size_t size = min_t(size_t, 16, rng_buffer_size());
mutex_lock(&reading_mutex);
- bytes_read = rng_get_data(rng, rng_buffer, size, 1);
+ bytes_read = rng_get_data(rng, rng_buffer, size, 0);
mutex_unlock(&reading_mutex);
if (bytes_read > 0)
add_device_randomness(rng_buffer, bytes_read);
diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
index 9423576..b4b52ab 100644
--- a/drivers/char/hw_random/exynos-trng.c
+++ b/drivers/char/hw_random/exynos-trng.c
@@ -153,7 +153,7 @@
goto err_clock;
}
- ret = hwrng_register(&trng->rng);
+ ret = devm_hwrng_register(&pdev->dev, &trng->rng);
if (ret) {
dev_err(&pdev->dev, "Could not register hwrng device.\n");
goto err_register;
@@ -179,7 +179,6 @@
{
struct exynos_trng_dev *trng = platform_get_drvdata(pdev);
- hwrng_unregister(&trng->rng);
clk_disable_unprepare(trng->clk);
pm_runtime_put_sync(&pdev->dev);
diff --git a/drivers/char/hw_random/hisi-rng.c b/drivers/char/hw_random/hisi-rng.c
index 40d9657..c663d5d 100644
--- a/drivers/char/hw_random/hisi-rng.c
+++ b/drivers/char/hw_random/hisi-rng.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2016 HiSilicon Co., Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/err.h>
diff --git a/drivers/char/hw_random/imx-rngc.c b/drivers/char/hw_random/imx-rngc.c
index 14730be..30cf00f 100644
--- a/drivers/char/hw_random/imx-rngc.c
+++ b/drivers/char/hw_random/imx-rngc.c
@@ -1,15 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* RNG driver for Freescale RNGC
*
* Copyright (C) 2008-2012 Freescale Semiconductor, Inc.
* Copyright (C) 2017 Martin Kaiser <martin@kaiser.cx>
- *
- * The code contained herein is licensed under the GNU General Public
- * License. You may obtain a copy of the GNU General Public License
- * Version 2 or later at the following locations:
- *
- * http://www.opensource.org/licenses/gpl-license.html
- * http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/module.h>
@@ -202,7 +196,6 @@
static int imx_rngc_probe(struct platform_device *pdev)
{
struct imx_rngc *rngc;
- struct resource *res;
int ret;
int irq;
@@ -210,8 +203,7 @@
if (!rngc)
return -ENOMEM;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- rngc->base = devm_ioremap_resource(&pdev->dev, res);
+ rngc->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(rngc->base))
return PTR_ERR(rngc->base);
diff --git a/drivers/char/hw_random/iproc-rng200.c b/drivers/char/hw_random/iproc-rng200.c
index 8b5a20b..92be1c0 100644
--- a/drivers/char/hw_random/iproc-rng200.c
+++ b/drivers/char/hw_random/iproc-rng200.c
@@ -220,6 +220,7 @@
}
static const struct of_device_id iproc_rng200_of_match[] = {
+ { .compatible = "brcm,bcm7211-rng200", },
{ .compatible = "brcm,bcm7278-rng200", },
{ .compatible = "brcm,iproc-rng200", },
{},
diff --git a/drivers/char/hw_random/ks-sa-rng.c b/drivers/char/hw_random/ks-sa-rng.c
index 62c6696..a674300 100644
--- a/drivers/char/hw_random/ks-sa-rng.c
+++ b/drivers/char/hw_random/ks-sa-rng.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Random Number Generator driver for the Keystone SOC
*
@@ -5,15 +6,6 @@
*
* Authors: Sandeep Nair
* Vitaly Andrianov
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * 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/hw_random.h>
diff --git a/drivers/char/hw_random/meson-rng.c b/drivers/char/hw_random/meson-rng.c
index 2e23be8..76e693d 100644
--- a/drivers/char/hw_random/meson-rng.c
+++ b/drivers/char/hw_random/meson-rng.c
@@ -1,58 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
* Copyright (c) 2016 BayLibre, SAS.
* Author: Neil Armstrong <narmstrong@baylibre.com>
* Copyright (C) 2014 Amlogic, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- * The full GNU General Public License is included in this distribution
- * in the file called COPYING.
- *
- * BSD LICENSE
- *
- * Copyright (c) 2016 BayLibre, SAS.
- * Author: Neil Armstrong <narmstrong@baylibre.com>
- * Copyright (C) 2014 Amlogic, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/err.h>
#include <linux/module.h>
diff --git a/drivers/char/hw_random/mtk-rng.c b/drivers/char/hw_random/mtk-rng.c
index 7f99cd5..e649be5 100644
--- a/drivers/char/hw_random/mtk-rng.c
+++ b/drivers/char/hw_random/mtk-rng.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Mediatek Hardware Random Number Generator
*
* Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * 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.
*/
#define MTK_RNG_DEV KBUILD_MODNAME
diff --git a/drivers/char/hw_random/mxc-rnga.c b/drivers/char/hw_random/mxc-rnga.c
index f83bee5..025083c 100644
--- a/drivers/char/hw_random/mxc-rnga.c
+++ b/drivers/char/hw_random/mxc-rnga.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* RNG driver for Freescale RNGA
*
@@ -6,12 +7,6 @@
*/
/*
- * The code contained herein is licensed under the GNU General Public
- * License. You may obtain a copy of the GNU General Public License
- * Version 2 or later at the following locations:
- *
- * http://www.opensource.org/licenses/gpl-license.html
- * http://www.gnu.org/copyleft/gpl.html
*
* This driver is based on other RNG drivers.
*/
@@ -139,7 +134,6 @@
static int __init mxc_rnga_probe(struct platform_device *pdev)
{
int err;
- struct resource *res;
struct mxc_rng *mxc_rng;
mxc_rng = devm_kzalloc(&pdev->dev, sizeof(*mxc_rng), GFP_KERNEL);
@@ -163,8 +157,7 @@
if (err)
return err;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mxc_rng->mem = devm_ioremap_resource(&pdev->dev, res);
+ mxc_rng->mem = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(mxc_rng->mem)) {
err = PTR_ERR(mxc_rng->mem);
goto err_ioremap;
diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c
index f841151..73e4081 100644
--- a/drivers/char/hw_random/n2-drv.c
+++ b/drivers/char/hw_random/n2-drv.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/* n2-drv.c: Niagara-2 RNG driver.
*
* Copyright (C) 2008, 2011 David S. Miller <davem@davemloft.net>
@@ -767,7 +768,7 @@
np->hwrng.data_read = n2rng_data_read;
np->hwrng.priv = (unsigned long) np;
- err = hwrng_register(&np->hwrng);
+ err = devm_hwrng_register(&op->dev, &np->hwrng);
if (err)
goto out_hvapi_unregister;
@@ -792,8 +793,6 @@
cancel_delayed_work_sync(&np->work);
- hwrng_unregister(&np->hwrng);
-
sun4v_hvapi_unregister(HV_GRP_RNG);
return 0;
diff --git a/drivers/char/hw_random/nomadik-rng.c b/drivers/char/hw_random/nomadik-rng.c
index 9c85815..74ed29f 100644
--- a/drivers/char/hw_random/nomadik-rng.c
+++ b/drivers/char/hw_random/nomadik-rng.c
@@ -1,11 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Nomadik RNG support
* Copyright 2009 Alessandro Rubini
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
*/
#include <linux/kernel.h>
@@ -61,7 +57,7 @@
if (!base)
goto out_release;
nmk_rng.priv = (unsigned long)base;
- ret = hwrng_register(&nmk_rng);
+ ret = devm_hwrng_register(&dev->dev, &nmk_rng);
if (ret)
goto out_release;
return 0;
@@ -75,7 +71,6 @@
static int nmk_rng_remove(struct amba_device *dev)
{
- hwrng_unregister(&nmk_rng);
amba_release_regions(dev);
clk_disable(rng_clk);
return 0;
diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c
index b65ff69..b27f396 100644
--- a/drivers/char/hw_random/omap-rng.c
+++ b/drivers/char/hw_random/omap-rng.c
@@ -443,6 +443,7 @@
priv->rng.read = omap_rng_do_read;
priv->rng.init = omap_rng_init;
priv->rng.cleanup = omap_rng_cleanup;
+ priv->rng.quality = 900;
priv->rng.priv = (unsigned long)priv;
platform_set_drvdata(pdev, priv);
@@ -499,7 +500,7 @@
if (ret)
goto err_register;
- ret = hwrng_register(&priv->rng);
+ ret = devm_hwrng_register(&pdev->dev, &priv->rng);
if (ret)
goto err_register;
@@ -524,7 +525,6 @@
{
struct omap_rng_dev *priv = platform_get_drvdata(pdev);
- hwrng_unregister(&priv->rng);
priv->pdata->cleanup(priv);
diff --git a/drivers/char/hw_random/optee-rng.c b/drivers/char/hw_random/optee-rng.c
new file mode 100644
index 0000000..ddfbaba
--- /dev/null
+++ b/drivers/char/hw_random/optee-rng.c
@@ -0,0 +1,306 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018-2019 Linaro Ltd.
+ */
+
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/hw_random.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/tee_drv.h>
+#include <linux/uuid.h>
+
+#define DRIVER_NAME "optee-rng"
+
+#define TEE_ERROR_HEALTH_TEST_FAIL 0x00000001
+
+/*
+ * TA_CMD_GET_ENTROPY - Get Entropy from RNG
+ *
+ * param[0] (inout memref) - Entropy buffer memory reference
+ * param[1] unused
+ * param[2] unused
+ * param[3] unused
+ *
+ * Result:
+ * TEE_SUCCESS - Invoke command success
+ * TEE_ERROR_BAD_PARAMETERS - Incorrect input param
+ * TEE_ERROR_NOT_SUPPORTED - Requested entropy size greater than size of pool
+ * TEE_ERROR_HEALTH_TEST_FAIL - Continuous health testing failed
+ */
+#define TA_CMD_GET_ENTROPY 0x0
+
+/*
+ * TA_CMD_GET_RNG_INFO - Get RNG information
+ *
+ * param[0] (out value) - value.a: RNG data-rate in bytes per second
+ * value.b: Quality/Entropy per 1024 bit of data
+ * param[1] unused
+ * param[2] unused
+ * param[3] unused
+ *
+ * Result:
+ * TEE_SUCCESS - Invoke command success
+ * TEE_ERROR_BAD_PARAMETERS - Incorrect input param
+ */
+#define TA_CMD_GET_RNG_INFO 0x1
+
+#define MAX_ENTROPY_REQ_SZ (4 * 1024)
+
+/**
+ * struct optee_rng_private - OP-TEE Random Number Generator private data
+ * @dev: OP-TEE based RNG device.
+ * @ctx: OP-TEE context handler.
+ * @session_id: RNG TA session identifier.
+ * @data_rate: RNG data rate.
+ * @entropy_shm_pool: Memory pool shared with RNG device.
+ * @optee_rng: OP-TEE RNG driver structure.
+ */
+struct optee_rng_private {
+ struct device *dev;
+ struct tee_context *ctx;
+ u32 session_id;
+ u32 data_rate;
+ struct tee_shm *entropy_shm_pool;
+ struct hwrng optee_rng;
+};
+
+#define to_optee_rng_private(r) \
+ container_of(r, struct optee_rng_private, optee_rng)
+
+static size_t get_optee_rng_data(struct optee_rng_private *pvt_data,
+ void *buf, size_t req_size)
+{
+ int ret = 0;
+ u8 *rng_data = NULL;
+ size_t rng_size = 0;
+ struct tee_ioctl_invoke_arg inv_arg;
+ struct tee_param param[4];
+
+ memset(&inv_arg, 0, sizeof(inv_arg));
+ memset(¶m, 0, sizeof(param));
+
+ /* Invoke TA_CMD_GET_ENTROPY function of Trusted App */
+ inv_arg.func = TA_CMD_GET_ENTROPY;
+ inv_arg.session = pvt_data->session_id;
+ inv_arg.num_params = 4;
+
+ /* Fill invoke cmd params */
+ param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT;
+ param[0].u.memref.shm = pvt_data->entropy_shm_pool;
+ param[0].u.memref.size = req_size;
+ param[0].u.memref.shm_offs = 0;
+
+ ret = tee_client_invoke_func(pvt_data->ctx, &inv_arg, param);
+ if ((ret < 0) || (inv_arg.ret != 0)) {
+ dev_err(pvt_data->dev, "TA_CMD_GET_ENTROPY invoke err: %x\n",
+ inv_arg.ret);
+ return 0;
+ }
+
+ rng_data = tee_shm_get_va(pvt_data->entropy_shm_pool, 0);
+ if (IS_ERR(rng_data)) {
+ dev_err(pvt_data->dev, "tee_shm_get_va failed\n");
+ return 0;
+ }
+
+ rng_size = param[0].u.memref.size;
+ memcpy(buf, rng_data, rng_size);
+
+ return rng_size;
+}
+
+static int optee_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
+{
+ struct optee_rng_private *pvt_data = to_optee_rng_private(rng);
+ size_t read = 0, rng_size = 0;
+ int timeout = 1;
+ u8 *data = buf;
+
+ if (max > MAX_ENTROPY_REQ_SZ)
+ max = MAX_ENTROPY_REQ_SZ;
+
+ while (read == 0) {
+ rng_size = get_optee_rng_data(pvt_data, data, (max - read));
+
+ data += rng_size;
+ read += rng_size;
+
+ if (wait) {
+ if (timeout-- == 0)
+ return read;
+ msleep((1000 * (max - read)) / pvt_data->data_rate);
+ } else {
+ return read;
+ }
+ }
+
+ return read;
+}
+
+static int optee_rng_init(struct hwrng *rng)
+{
+ struct optee_rng_private *pvt_data = to_optee_rng_private(rng);
+ struct tee_shm *entropy_shm_pool = NULL;
+
+ entropy_shm_pool = tee_shm_alloc(pvt_data->ctx, MAX_ENTROPY_REQ_SZ,
+ TEE_SHM_MAPPED | TEE_SHM_DMA_BUF);
+ if (IS_ERR(entropy_shm_pool)) {
+ dev_err(pvt_data->dev, "tee_shm_alloc failed\n");
+ return PTR_ERR(entropy_shm_pool);
+ }
+
+ pvt_data->entropy_shm_pool = entropy_shm_pool;
+
+ return 0;
+}
+
+static void optee_rng_cleanup(struct hwrng *rng)
+{
+ struct optee_rng_private *pvt_data = to_optee_rng_private(rng);
+
+ tee_shm_free(pvt_data->entropy_shm_pool);
+}
+
+static struct optee_rng_private pvt_data = {
+ .optee_rng = {
+ .name = DRIVER_NAME,
+ .init = optee_rng_init,
+ .cleanup = optee_rng_cleanup,
+ .read = optee_rng_read,
+ }
+};
+
+static int get_optee_rng_info(struct device *dev)
+{
+ int ret = 0;
+ struct tee_ioctl_invoke_arg inv_arg;
+ struct tee_param param[4];
+
+ memset(&inv_arg, 0, sizeof(inv_arg));
+ memset(¶m, 0, sizeof(param));
+
+ /* Invoke TA_CMD_GET_RNG_INFO function of Trusted App */
+ inv_arg.func = TA_CMD_GET_RNG_INFO;
+ inv_arg.session = pvt_data.session_id;
+ inv_arg.num_params = 4;
+
+ /* Fill invoke cmd params */
+ param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT;
+
+ ret = tee_client_invoke_func(pvt_data.ctx, &inv_arg, param);
+ if ((ret < 0) || (inv_arg.ret != 0)) {
+ dev_err(dev, "TA_CMD_GET_RNG_INFO invoke err: %x\n",
+ inv_arg.ret);
+ return -EINVAL;
+ }
+
+ pvt_data.data_rate = param[0].u.value.a;
+ pvt_data.optee_rng.quality = param[0].u.value.b;
+
+ return 0;
+}
+
+static int optee_ctx_match(struct tee_ioctl_version_data *ver, const void *data)
+{
+ if (ver->impl_id == TEE_IMPL_ID_OPTEE)
+ return 1;
+ else
+ return 0;
+}
+
+static int optee_rng_probe(struct device *dev)
+{
+ struct tee_client_device *rng_device = to_tee_client_device(dev);
+ int ret = 0, err = -ENODEV;
+ struct tee_ioctl_open_session_arg sess_arg;
+
+ memset(&sess_arg, 0, sizeof(sess_arg));
+
+ /* Open context with TEE driver */
+ pvt_data.ctx = tee_client_open_context(NULL, optee_ctx_match, NULL,
+ NULL);
+ if (IS_ERR(pvt_data.ctx))
+ return -ENODEV;
+
+ /* Open session with hwrng Trusted App */
+ memcpy(sess_arg.uuid, rng_device->id.uuid.b, TEE_IOCTL_UUID_LEN);
+ sess_arg.clnt_login = TEE_IOCTL_LOGIN_PUBLIC;
+ sess_arg.num_params = 0;
+
+ ret = tee_client_open_session(pvt_data.ctx, &sess_arg, NULL);
+ if ((ret < 0) || (sess_arg.ret != 0)) {
+ dev_err(dev, "tee_client_open_session failed, err: %x\n",
+ sess_arg.ret);
+ err = -EINVAL;
+ goto out_ctx;
+ }
+ pvt_data.session_id = sess_arg.session;
+
+ err = get_optee_rng_info(dev);
+ if (err)
+ goto out_sess;
+
+ err = hwrng_register(&pvt_data.optee_rng);
+ if (err) {
+ dev_err(dev, "hwrng registration failed (%d)\n", err);
+ goto out_sess;
+ }
+
+ pvt_data.dev = dev;
+
+ return 0;
+
+out_sess:
+ tee_client_close_session(pvt_data.ctx, pvt_data.session_id);
+out_ctx:
+ tee_client_close_context(pvt_data.ctx);
+
+ return err;
+}
+
+static int optee_rng_remove(struct device *dev)
+{
+ hwrng_unregister(&pvt_data.optee_rng);
+ tee_client_close_session(pvt_data.ctx, pvt_data.session_id);
+ tee_client_close_context(pvt_data.ctx);
+
+ return 0;
+}
+
+static const struct tee_client_device_id optee_rng_id_table[] = {
+ {UUID_INIT(0xab7a617c, 0xb8e7, 0x4d8f,
+ 0x83, 0x01, 0xd0, 0x9b, 0x61, 0x03, 0x6b, 0x64)},
+ {}
+};
+
+MODULE_DEVICE_TABLE(tee, optee_rng_id_table);
+
+static struct tee_client_driver optee_rng_driver = {
+ .id_table = optee_rng_id_table,
+ .driver = {
+ .name = DRIVER_NAME,
+ .bus = &tee_bus_type,
+ .probe = optee_rng_probe,
+ .remove = optee_rng_remove,
+ },
+};
+
+static int __init optee_rng_mod_init(void)
+{
+ return driver_register(&optee_rng_driver.driver);
+}
+
+static void __exit optee_rng_mod_exit(void)
+{
+ driver_unregister(&optee_rng_driver.driver);
+}
+
+module_init(optee_rng_mod_init);
+module_exit(optee_rng_mod_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Sumit Garg <sumit.garg@linaro.org>");
+MODULE_DESCRIPTION("OP-TEE based random number generator driver");
diff --git a/drivers/char/hw_random/pasemi-rng.c b/drivers/char/hw_random/pasemi-rng.c
index 545df48..24b1460 100644
--- a/drivers/char/hw_random/pasemi-rng.c
+++ b/drivers/char/hw_random/pasemi-rng.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2006-2007 PA Semi, Inc
*
* Maintained by: Olof Johansson <olof@lixom.net>
*
* Driver for the PWRficient onchip rng
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
diff --git a/drivers/char/hw_random/pic32-rng.c b/drivers/char/hw_random/pic32-rng.c
index 9b5e68a..90f498c 100644
--- a/drivers/char/hw_random/pic32-rng.c
+++ b/drivers/char/hw_random/pic32-rng.c
@@ -1,17 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* PIC32 RNG driver
*
* Joshua Henderson <joshua.henderson@microchip.com>
* Copyright (C) 2016 Microchip Technology Inc. All rights reserved.
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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/clk.h>
diff --git a/drivers/char/hw_random/powernv-rng.c b/drivers/char/hw_random/powernv-rng.c
index 791182a..8da1d79 100644
--- a/drivers/char/hw_random/powernv-rng.c
+++ b/drivers/char/hw_random/powernv-rng.c
@@ -1,10 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2013 Michael Ellerman, Guo Chao, IBM Corp.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -37,18 +33,11 @@
.read = powernv_rng_read,
};
-static int powernv_rng_remove(struct platform_device *pdev)
-{
- hwrng_unregister(&powernv_hwrng);
-
- return 0;
-}
-
static int powernv_rng_probe(struct platform_device *pdev)
{
int rc;
- rc = hwrng_register(&powernv_hwrng);
+ rc = devm_hwrng_register(&pdev->dev, &powernv_hwrng);
if (rc) {
/* We only register one device, ignore any others */
if (rc == -EEXIST)
@@ -74,7 +63,6 @@
.of_match_table = powernv_rng_match,
},
.probe = powernv_rng_probe,
- .remove = powernv_rng_remove,
};
module_platform_driver(powernv_rng_driver);
diff --git a/drivers/char/hw_random/pseries-rng.c b/drivers/char/hw_random/pseries-rng.c
index 4e2a3f6..8038a8a 100644
--- a/drivers/char/hw_random/pseries-rng.c
+++ b/drivers/char/hw_random/pseries-rng.c
@@ -1,20 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2010 Michael Neuling IBM Corporation
*
* Driver for the pseries hardware RNG for POWER7+ and above
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/char/hw_random/s390-trng.c b/drivers/char/hw_random/s390-trng.c
index aca48e8..413cacb 100644
--- a/drivers/char/hw_random/s390-trng.c
+++ b/drivers/char/hw_random/s390-trng.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* s390 TRNG device driver
*
@@ -6,11 +7,6 @@
* Copyright IBM Corp. 2017
* Author(s): Harald Freudenberger <freude@de.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License (version 2 only)
- * as published by the Free Software Foundation.
- *
*/
#define KMSG_COMPONENT "trng"
diff --git a/drivers/char/hw_random/st-rng.c b/drivers/char/hw_random/st-rng.c
index 938ec10..8634483 100644
--- a/drivers/char/hw_random/st-rng.c
+++ b/drivers/char/hw_random/st-rng.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* ST Random Number Generator Driver ST's Platforms
*
@@ -5,10 +6,6 @@
* Lee Jones <lee.jones@linaro.org>
*
* Copyright (C) 2015 STMicroelectronics (R&D) Limited
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/clk.h>
@@ -105,7 +102,7 @@
dev_set_drvdata(&pdev->dev, ddata);
- ret = hwrng_register(&ddata->ops);
+ ret = devm_hwrng_register(&pdev->dev, &ddata->ops);
if (ret) {
dev_err(&pdev->dev, "Failed to register HW RNG\n");
clk_disable_unprepare(clk);
@@ -121,8 +118,6 @@
{
struct st_rng_data *ddata = dev_get_drvdata(&pdev->dev);
- hwrng_unregister(&ddata->ops);
-
clk_disable_unprepare(ddata->clk);
return 0;
diff --git a/drivers/char/hw_random/stm32-rng.c b/drivers/char/hw_random/stm32-rng.c
index 042860d..38324c2 100644
--- a/drivers/char/hw_random/stm32-rng.c
+++ b/drivers/char/hw_random/stm32-rng.c
@@ -1,15 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2015, Daniel Thompson
- *
- * This file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This file 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/clk.h>
@@ -161,6 +152,7 @@
#endif
priv->rng.read = stm32_rng_read,
priv->rng.priv = (unsigned long) dev;
+ priv->rng.quality = 900;
pm_runtime_set_autosuspend_delay(dev, 100);
pm_runtime_use_autosuspend(dev);
@@ -169,6 +161,13 @@
return devm_hwrng_register(dev, &priv->rng);
}
+static int stm32_rng_remove(struct platform_device *ofdev)
+{
+ pm_runtime_disable(&ofdev->dev);
+
+ return 0;
+}
+
#ifdef CONFIG_PM
static int stm32_rng_runtime_suspend(struct device *dev)
{
@@ -210,6 +209,7 @@
.of_match_table = stm32_rng_match,
},
.probe = stm32_rng_probe,
+ .remove = stm32_rng_remove,
};
module_platform_driver(stm32_rng_driver);
diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c
index f615684..e262445 100644
--- a/drivers/char/hw_random/timeriomem-rng.c
+++ b/drivers/char/hw_random/timeriomem-rng.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* drivers/char/hw_random/timeriomem-rng.c
*
@@ -7,10 +8,6 @@
* Copyright 2005 (c) MontaVista Software, Inc.
* Author: Deepak Saxena <dsaxena@plexity.net>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* Overview:
* This driver is useful for platforms that have an IO range that provides
* periodic random data from a single IO memory address. All the platform
@@ -120,9 +117,9 @@
if (!res)
return -ENXIO;
- if (res->start % 4 != 0 || resource_size(res) != 4) {
+ if (res->start % 4 != 0 || resource_size(res) < 4) {
dev_err(&pdev->dev,
- "address must be four bytes wide and aligned\n");
+ "address must be at least four bytes wide and 32-bit aligned\n");
return -EINVAL;
}
diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c
index b89df66..718d8c0 100644
--- a/drivers/char/hw_random/virtio-rng.c
+++ b/drivers/char/hw_random/virtio-rng.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Randomness driver for virtio
* Copyright (C) 2007, 2008 Rusty Russell IBM Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/err.h>
@@ -73,7 +60,7 @@
if (!vi->busy) {
vi->busy = true;
- init_completion(&vi->have_data);
+ reinit_completion(&vi->have_data);
register_buffer(vi, buf, size);
}
diff --git a/drivers/char/hw_random/xgene-rng.c b/drivers/char/hw_random/xgene-rng.c
index 7175579..7e568db 100644
--- a/drivers/char/hw_random/xgene-rng.c
+++ b/drivers/char/hw_random/xgene-rng.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* APM X-Gene SoC RNG Driver
*
@@ -5,20 +6,6 @@
* Author: Rameshwar Prasad Sahu <rsahu@apm.com>
* Shamal Winchurkar <swinchurkar@apm.com>
* Feng Kan <fkan@apm.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
*/
#include <linux/acpi.h>
@@ -374,7 +361,7 @@
xgene_rng_func.priv = (unsigned long) ctx;
- rc = hwrng_register(&xgene_rng_func);
+ rc = devm_hwrng_register(&pdev->dev, &xgene_rng_func);
if (rc) {
dev_err(&pdev->dev, "RNG registering failed error %d\n", rc);
if (!IS_ERR(ctx->clk))
@@ -388,7 +375,6 @@
rc);
if (!IS_ERR(ctx->clk))
clk_disable_unprepare(ctx->clk);
- hwrng_unregister(&xgene_rng_func);
return rc;
}
@@ -405,7 +391,6 @@
dev_err(&pdev->dev, "RNG init wakeup failed error %d\n", rc);
if (!IS_ERR(ctx->clk))
clk_disable_unprepare(ctx->clk);
- hwrng_unregister(&xgene_rng_func);
return rc;
}