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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-02 14:53:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-02 14:53:12 -0700
commit797994f81a8b2bdca2eecffa415c1e7a89a4f961 (patch)
tree1383dc469c26ad37fdf960f682d9a48c782935c5 /drivers/char
parentc8d8566952fda026966784a62f324c8352f77430 (diff)
parent3862de1f6c442d53bd828d39f86d07d933a70605 (diff)
downloadvexpress-lsk-797994f81a8b2bdca2eecffa415c1e7a89a4f961.tar.gz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu: - XTS mode optimisation for twofish/cast6/camellia/aes on x86 - AVX2/x86_64 implementation for blowfish/twofish/serpent/camellia - SSSE3/AVX/AVX2 optimisations for sha256/sha512 - Added driver for SAHARA2 crypto accelerator - Fix for GMAC when used in non-IPsec secnarios - Added generic CMAC implementation (including IPsec glue) - IP update for crypto/atmel - Support for more than one device in hwrng/timeriomem - Added Broadcom BCM2835 RNG driver - Misc fixes * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (59 commits) crypto: caam - fix job ring cleanup code crypto: camellia - add AVX2/AES-NI/x86_64 assembler implementation of camellia cipher crypto: serpent - add AVX2/x86_64 assembler implementation of serpent cipher crypto: twofish - add AVX2/x86_64 assembler implementation of twofish cipher crypto: blowfish - add AVX2/x86_64 implementation of blowfish cipher crypto: tcrypt - add async cipher speed tests for blowfish crypto: testmgr - extend camellia test-vectors for camellia-aesni/avx2 crypto: aesni_intel - fix Kconfig problem with CRYPTO_GLUE_HELPER_X86 crypto: aesni_intel - add more optimized XTS mode for x86-64 crypto: x86/camellia-aesni-avx - add more optimized XTS code crypto: cast6-avx: use new optimized XTS code crypto: x86/twofish-avx - use optimized XTS code crypto: x86 - add more optimized XTS-mode for serpent-avx xfrm: add rfc4494 AES-CMAC-96 support crypto: add CMAC support to CryptoAPI crypto: testmgr - add empty test vectors for null ciphers crypto: testmgr - add AES GMAC test vectors crypto: gcm - fix rfc4543 to handle async crypto correctly crypto: gcm - make GMAC work when dst and src are different hwrng: timeriomem - added devicetree hooks ...
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/hw_random/Kconfig12
-rw-r--r--drivers/char/hw_random/Makefile1
-rw-r--r--drivers/char/hw_random/bcm2835-rng.c113
-rw-r--r--drivers/char/hw_random/exynos-rng.c3
-rw-r--r--drivers/char/hw_random/mxc-rnga.c21
-rw-r--r--drivers/char/hw_random/timeriomem-rng.c190
6 files changed, 268 insertions, 72 deletions
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index c5a0262251b..2f9dbf7568f 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -86,6 +86,18 @@ config HW_RANDOM_BCM63XX
If unusure, say Y.
+config HW_RANDOM_BCM2835
+ tristate "Broadcom BCM2835 Random Number Generator support"
+ depends on HW_RANDOM && ARCH_BCM2835
+ default HW_RANDOM
+ ---help---
+ This driver provides kernel-side support for the Random Number
+ Generator hardware found on the Broadcom BCM2835 SoCs.
+
+ To compile this driver as a module, choose M here: the
+ module will be called bcm2835-rng
+
+ If unsure, say Y.
config HW_RANDOM_GEODE
tristate "AMD Geode HW Random Number Generator support"
diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile
index 1fd7eec9fbf..bed467c9300 100644
--- a/drivers/char/hw_random/Makefile
+++ b/drivers/char/hw_random/Makefile
@@ -26,3 +26,4 @@ obj-$(CONFIG_HW_RANDOM_PPC4XX) += ppc4xx-rng.o
obj-$(CONFIG_HW_RANDOM_PSERIES) += pseries-rng.o
obj-$(CONFIG_HW_RANDOM_EXYNOS) += exynos-rng.o
obj-$(CONFIG_HW_RANDOM_TPM) += tpm-rng.o
+obj-$(CONFIG_HW_RANDOM_BCM2835) += bcm2835-rng.o
diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c
new file mode 100644
index 00000000000..eb7f14725eb
--- /dev/null
+++ b/drivers/char/hw_random/bcm2835-rng.c
@@ -0,0 +1,113 @@
+/**
+ * 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>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+
+#define RNG_CTRL 0x0
+#define RNG_STATUS 0x4
+#define RNG_DATA 0x8
+
+/* enable rng */
+#define RNG_RBGEN 0x1
+
+/* the initial numbers generated are "less random" so will be discarded */
+#define RNG_WARMUP_COUNT 0x40000
+
+static int bcm2835_rng_read(struct hwrng *rng, void *buf, size_t max,
+ bool wait)
+{
+ void __iomem *rng_base = (void __iomem *)rng->priv;
+
+ while ((__raw_readl(rng_base + RNG_STATUS) >> 24) == 0) {
+ if (!wait)
+ return 0;
+ cpu_relax();
+ }
+
+ *(u32 *)buf = __raw_readl(rng_base + RNG_DATA);
+ return sizeof(u32);
+}
+
+static struct hwrng bcm2835_rng_ops = {
+ .name = "bcm2835",
+ .read = bcm2835_rng_read,
+};
+
+static int bcm2835_rng_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ void __iomem *rng_base;
+ int err;
+
+ /* map peripheral */
+ rng_base = of_iomap(np, 0);
+ if (!rng_base) {
+ dev_err(dev, "failed to remap rng regs");
+ return -ENODEV;
+ }
+ bcm2835_rng_ops.priv = (unsigned long)rng_base;
+
+ /* register driver */
+ err = hwrng_register(&bcm2835_rng_ops);
+ if (err) {
+ dev_err(dev, "hwrng registration failed\n");
+ iounmap(rng_base);
+ } else {
+ dev_info(dev, "hwrng registered\n");
+
+ /* set warm-up count & enable */
+ __raw_writel(RNG_WARMUP_COUNT, rng_base + RNG_STATUS);
+ __raw_writel(RNG_RBGEN, rng_base + RNG_CTRL);
+ }
+ return err;
+}
+
+static int bcm2835_rng_remove(struct platform_device *pdev)
+{
+ void __iomem *rng_base = (void __iomem *)bcm2835_rng_ops.priv;
+
+ /* disable rng hardware */
+ __raw_writel(0, rng_base + RNG_CTRL);
+
+ /* unregister driver */
+ hwrng_unregister(&bcm2835_rng_ops);
+ iounmap(rng_base);
+
+ return 0;
+}
+
+static const struct of_device_id bcm2835_rng_of_match[] = {
+ { .compatible = "brcm,bcm2835-rng", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, bcm2835_rng_of_match);
+
+static struct platform_driver bcm2835_rng_driver = {
+ .driver = {
+ .name = "bcm2835-rng",
+ .owner = THIS_MODULE,
+ .of_match_table = bcm2835_rng_of_match,
+ },
+ .probe = bcm2835_rng_probe,
+ .remove = bcm2835_rng_remove,
+};
+module_platform_driver(bcm2835_rng_driver);
+
+MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
+MODULE_DESCRIPTION("BCM2835 Random Number Generator (RNG) driver");
+MODULE_LICENSE("GPLv2");
diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c
index ac47631ab34..402ccfb625c 100644
--- a/drivers/char/hw_random/exynos-rng.c
+++ b/drivers/char/hw_random/exynos-rng.c
@@ -144,6 +144,7 @@ static int exynos_rng_remove(struct platform_device *pdev)
return 0;
}
+#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM_RUNTIME)
static int exynos_rng_runtime_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
@@ -161,7 +162,7 @@ static int exynos_rng_runtime_resume(struct device *dev)
return clk_prepare_enable(exynos_rng->clk);
}
-
+#endif
static UNIVERSAL_DEV_PM_OPS(exynos_rng_pm_ops, exynos_rng_runtime_suspend,
exynos_rng_runtime_resume, NULL);
diff --git a/drivers/char/hw_random/mxc-rnga.c b/drivers/char/hw_random/mxc-rnga.c
index 895d0b8fb9a..4ca35e8a5d8 100644
--- a/drivers/char/hw_random/mxc-rnga.c
+++ b/drivers/char/hw_random/mxc-rnga.c
@@ -142,7 +142,7 @@ static void mxc_rnga_cleanup(struct hwrng *rng)
static int __init mxc_rnga_probe(struct platform_device *pdev)
{
int err = -ENODEV;
- struct resource *res, *mem;
+ struct resource *res;
struct mxc_rng *mxc_rng;
mxc_rng = devm_kzalloc(&pdev->dev, sizeof(struct mxc_rng),
@@ -172,15 +172,9 @@ static int __init mxc_rnga_probe(struct platform_device *pdev)
goto err_region;
}
- mem = request_mem_region(res->start, resource_size(res), pdev->name);
- if (mem == NULL) {
- err = -EBUSY;
- goto err_region;
- }
-
- mxc_rng->mem = ioremap(res->start, resource_size(res));
- if (!mxc_rng->mem) {
- err = -ENOMEM;
+ mxc_rng->mem = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(mxc_rng->mem)) {
+ err = PTR_ERR(mxc_rng->mem);
goto err_ioremap;
}
@@ -195,8 +189,6 @@ static int __init mxc_rnga_probe(struct platform_device *pdev)
return 0;
err_ioremap:
- release_mem_region(res->start, resource_size(res));
-
err_region:
clk_disable_unprepare(mxc_rng->clk);
@@ -206,15 +198,10 @@ out:
static int __exit mxc_rnga_remove(struct platform_device *pdev)
{
- struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct mxc_rng *mxc_rng = platform_get_drvdata(pdev);
hwrng_unregister(&mxc_rng->rng);
- iounmap(mxc_rng->mem);
-
- release_mem_region(res->start, resource_size(res));
-
clk_disable_unprepare(mxc_rng->clk);
return 0;
diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c
index 849db199c02..3e75737f5fe 100644
--- a/drivers/char/hw_random/timeriomem-rng.c
+++ b/drivers/char/hw_random/timeriomem-rng.c
@@ -23,127 +23,209 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
+#include <linux/of.h>
#include <linux/hw_random.h>
#include <linux/io.h>
+#include <linux/slab.h>
#include <linux/timeriomem-rng.h>
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/completion.h>
-static struct timeriomem_rng_data *timeriomem_rng_data;
+struct timeriomem_rng_private_data {
+ void __iomem *io_base;
+ unsigned int expires;
+ unsigned int period;
+ unsigned int present:1;
-static void timeriomem_rng_trigger(unsigned long);
-static DEFINE_TIMER(timeriomem_rng_timer, timeriomem_rng_trigger, 0, 0);
+ struct timer_list timer;
+ struct completion completion;
+
+ struct hwrng timeriomem_rng_ops;
+};
+
+#define to_rng_priv(rng) \
+ ((struct timeriomem_rng_private_data *)rng->priv)
/*
* have data return 1, however return 0 if we have nothing
*/
static int timeriomem_rng_data_present(struct hwrng *rng, int wait)
{
- if (rng->priv == 0)
- return 1;
+ struct timeriomem_rng_private_data *priv = to_rng_priv(rng);
- if (!wait || timeriomem_rng_data->present)
- return timeriomem_rng_data->present;
+ if (!wait || priv->present)
+ return priv->present;
- wait_for_completion(&timeriomem_rng_data->completion);
+ wait_for_completion(&priv->completion);
return 1;
}
static int timeriomem_rng_data_read(struct hwrng *rng, u32 *data)
{
+ struct timeriomem_rng_private_data *priv = to_rng_priv(rng);
unsigned long cur;
s32 delay;
- *data = readl(timeriomem_rng_data->address);
+ *data = readl(priv->io_base);
- if (rng->priv != 0) {
- cur = jiffies;
+ cur = jiffies;
- delay = cur - timeriomem_rng_timer.expires;
- delay = rng->priv - (delay % rng->priv);
+ delay = cur - priv->expires;
+ delay = priv->period - (delay % priv->period);
- timeriomem_rng_timer.expires = cur + delay;
- timeriomem_rng_data->present = 0;
+ priv->expires = cur + delay;
+ priv->present = 0;
- init_completion(&timeriomem_rng_data->completion);
- add_timer(&timeriomem_rng_timer);
- }
+ INIT_COMPLETION(priv->completion);
+ mod_timer(&priv->timer, priv->expires);
return 4;
}
-static void timeriomem_rng_trigger(unsigned long dummy)
+static void timeriomem_rng_trigger(unsigned long data)
{
- timeriomem_rng_data->present = 1;
- complete(&timeriomem_rng_data->completion);
-}
+ struct timeriomem_rng_private_data *priv
+ = (struct timeriomem_rng_private_data *)data;
-static struct hwrng timeriomem_rng_ops = {
- .name = "timeriomem",
- .data_present = timeriomem_rng_data_present,
- .data_read = timeriomem_rng_data_read,
- .priv = 0,
-};
+ priv->present = 1;
+ complete(&priv->completion);
+}
static int timeriomem_rng_probe(struct platform_device *pdev)
{
+ struct timeriomem_rng_data *pdata = pdev->dev.platform_data;
+ struct timeriomem_rng_private_data *priv;
struct resource *res;
- int ret;
+ int err = 0;
+ int period;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!pdev->dev.of_node && !pdata) {
+ dev_err(&pdev->dev, "timeriomem_rng_data is missing\n");
+ return -EINVAL;
+ }
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
- return -ENOENT;
+ return -ENXIO;
- timeriomem_rng_data = pdev->dev.platform_data;
+ if (res->start % 4 != 0 || resource_size(res) != 4) {
+ dev_err(&pdev->dev,
+ "address must be four bytes wide and aligned\n");
+ return -EINVAL;
+ }
- timeriomem_rng_data->address = ioremap(res->start, resource_size(res));
- if (!timeriomem_rng_data->address)
- return -EIO;
+ /* Allocate memory for the device structure (and zero it) */
+ priv = kzalloc(sizeof(struct timeriomem_rng_private_data), GFP_KERNEL);
+ if (!priv) {
+ dev_err(&pdev->dev, "failed to allocate device structure.\n");
+ return -ENOMEM;
+ }
+
+ platform_set_drvdata(pdev, priv);
+
+ if (pdev->dev.of_node) {
+ int i;
+
+ if (!of_property_read_u32(pdev->dev.of_node,
+ "period", &i))
+ period = i;
+ else {
+ dev_err(&pdev->dev, "missing period\n");
+ err = -EINVAL;
+ goto out_free;
+ }
+ } else
+ period = pdata->period;
+
+ priv->period = usecs_to_jiffies(period);
+ if (priv->period < 1) {
+ dev_err(&pdev->dev, "period is less than one jiffy\n");
+ err = -EINVAL;
+ goto out_free;
+ }
- if (timeriomem_rng_data->period != 0
- && usecs_to_jiffies(timeriomem_rng_data->period) > 0) {
- timeriomem_rng_timer.expires = jiffies;
+ priv->expires = jiffies;
+ priv->present = 1;
- timeriomem_rng_ops.priv = usecs_to_jiffies(
- timeriomem_rng_data->period);
+ init_completion(&priv->completion);
+ complete(&priv->completion);
+
+ setup_timer(&priv->timer, timeriomem_rng_trigger, (unsigned long)priv);
+
+ priv->timeriomem_rng_ops.name = dev_name(&pdev->dev);
+ priv->timeriomem_rng_ops.data_present = timeriomem_rng_data_present;
+ priv->timeriomem_rng_ops.data_read = timeriomem_rng_data_read;
+ priv->timeriomem_rng_ops.priv = (unsigned long)priv;
+
+ if (!request_mem_region(res->start, resource_size(res),
+ dev_name(&pdev->dev))) {
+ dev_err(&pdev->dev, "request_mem_region failed\n");
+ err = -EBUSY;
+ goto out_timer;
}
- timeriomem_rng_data->present = 1;
- ret = hwrng_register(&timeriomem_rng_ops);
- if (ret)
- goto failed;
+ priv->io_base = ioremap(res->start, resource_size(res));
+ if (priv->io_base == NULL) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ err = -EIO;
+ goto out_release_io;
+ }
+
+ err = hwrng_register(&priv->timeriomem_rng_ops);
+ if (err) {
+ dev_err(&pdev->dev, "problem registering\n");
+ goto out;
+ }
dev_info(&pdev->dev, "32bits from 0x%p @ %dus\n",
- timeriomem_rng_data->address,
- timeriomem_rng_data->period);
+ priv->io_base, period);
return 0;
-failed:
- dev_err(&pdev->dev, "problem registering\n");
- iounmap(timeriomem_rng_data->address);
-
- return ret;
+out:
+ iounmap(priv->io_base);
+out_release_io:
+ release_mem_region(res->start, resource_size(res));
+out_timer:
+ del_timer_sync(&priv->timer);
+out_free:
+ platform_set_drvdata(pdev, NULL);
+ kfree(priv);
+ return err;
}
static int timeriomem_rng_remove(struct platform_device *pdev)
{
- del_timer_sync(&timeriomem_rng_timer);
- hwrng_unregister(&timeriomem_rng_ops);
+ struct timeriomem_rng_private_data *priv = platform_get_drvdata(pdev);
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- iounmap(timeriomem_rng_data->address);
+ hwrng_unregister(&priv->timeriomem_rng_ops);
+
+ del_timer_sync(&priv->timer);
+ iounmap(priv->io_base);
+ release_mem_region(res->start, resource_size(res));
+ platform_set_drvdata(pdev, NULL);
+ kfree(priv);
return 0;
}
+static const struct of_device_id timeriomem_rng_match[] = {
+ { .compatible = "timeriomem_rng" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, timeriomem_rng_match);
+
static struct platform_driver timeriomem_rng_driver = {
.driver = {
.name = "timeriomem_rng",
.owner = THIS_MODULE,
+ .of_match_table = timeriomem_rng_match,
},
.probe = timeriomem_rng_probe,
.remove = timeriomem_rng_remove,