diff options
Diffstat (limited to 'drivers')
79 files changed, 20407 insertions, 905 deletions
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index ceff2fc524b1..0cafe08919c9 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -172,8 +172,8 @@ config HW_RANDOM_OMAP default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number - Generator hardware found on OMAP16xx, OMAP2/3/4/5 and AM33xx/AM43xx - multimedia processors. + Generator hardware found on OMAP16xx, OMAP2/3/4/5, AM33xx/AM43xx + multimedia processors, and Marvell Armada 7k/8k SoCs. To compile this driver as a module, choose M here: the module will be called omap-rng. diff --git a/drivers/char/hw_random/cavium-rng-vf.c b/drivers/char/hw_random/cavium-rng-vf.c index 066ae0e78d63..dd1007aecb10 100644 --- a/drivers/char/hw_random/cavium-rng-vf.c +++ b/drivers/char/hw_random/cavium-rng-vf.c @@ -57,7 +57,11 @@ static int cavium_rng_probe_vf(struct pci_dev *pdev, return -ENOMEM; } - rng->ops.name = "cavium rng"; + rng->ops.name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "cavium-rng-%s", dev_name(&pdev->dev)); + if (!rng->ops.name) + return -ENOMEM; + rng->ops.read = cavium_rng_read; rng->ops.quality = 1000; diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index 87fba424817e..5c654b5d4adf 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -1,55 +1,30 @@ /* - Added support for the AMD Geode LX RNG - (c) Copyright 2004-2005 Advanced Micro Devices, Inc. - - derived from - - Hardware driver for the Intel/AMD/VIA Random Number Generators (RNG) - (c) Copyright 2003 Red Hat Inc <jgarzik@redhat.com> - - derived from - - Hardware driver for the AMD 768 Random Number Generator (RNG) - (c) Copyright 2001 Red Hat Inc <alan@redhat.com> - - derived from - - Hardware driver for Intel i810 Random Number Generator (RNG) - Copyright 2000,2001 Jeff Garzik <jgarzik@pobox.com> - Copyright 2000,2001 Philipp Rumpf <prumpf@mandrakesoft.com> - - Added generic RNG API - Copyright 2006 Michael Buesch <m@bues.ch> - Copyright 2005 (c) MontaVista Software, Inc. - - Please read Documentation/hw_random.txt 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. - + * hw_random/core.c: HWRNG core API + * + * Copyright 2006 Michael Buesch <m@bues.ch> + * Copyright 2005 (c) MontaVista Software, Inc. + * + * Please read Documentation/hw_random.txt 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. */ - +#include <linux/delay.h> #include <linux/device.h> +#include <linux/err.h> +#include <linux/fs.h> #include <linux/hw_random.h> -#include <linux/module.h> #include <linux/kernel.h> -#include <linux/fs.h> -#include <linux/sched.h> -#include <linux/miscdevice.h> #include <linux/kthread.h> -#include <linux/delay.h> -#include <linux/slab.h> +#include <linux/miscdevice.h> +#include <linux/module.h> #include <linux/random.h> -#include <linux/err.h> +#include <linux/sched.h> +#include <linux/slab.h> #include <linux/uaccess.h> - #define RNG_MODULE_NAME "hw_random" -#define PFX RNG_MODULE_NAME ": " -#define RNG_MISCDEV_MINOR 183 /* official */ - static struct hwrng *current_rng; static struct task_struct *hwrng_fill; @@ -296,7 +271,6 @@ out_put: goto out; } - static const struct file_operations rng_chrdev_ops = { .owner = THIS_MODULE, .open = rng_dev_open, @@ -307,14 +281,13 @@ static const struct file_operations rng_chrdev_ops = { static const struct attribute_group *rng_dev_groups[]; static struct miscdevice rng_miscdev = { - .minor = RNG_MISCDEV_MINOR, + .minor = HWRNG_MINOR, .name = RNG_MODULE_NAME, .nodename = "hwrng", .fops = &rng_chrdev_ops, .groups = rng_dev_groups, }; - static ssize_t hwrng_attr_current_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) @@ -444,8 +417,7 @@ int hwrng_register(struct hwrng *rng) int err = -EINVAL; struct hwrng *old_rng, *tmp; - if (rng->name == NULL || - (rng->data_read == NULL && rng->read == NULL)) + if (!rng->name || (!rng->data_read && !rng->read)) goto out; mutex_lock(&rng_mutex); diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c index 3b06c1d6cfb2..31cbdbbaebfc 100644 --- a/drivers/char/hw_random/n2-drv.c +++ b/drivers/char/hw_random/n2-drv.c @@ -21,11 +21,11 @@ #define DRV_MODULE_NAME "n2rng" #define PFX DRV_MODULE_NAME ": " -#define DRV_MODULE_VERSION "0.2" -#define DRV_MODULE_RELDATE "July 27, 2011" +#define DRV_MODULE_VERSION "0.3" +#define DRV_MODULE_RELDATE "Jan 7, 2017" static char version[] = - DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; + DRV_MODULE_NAME " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); MODULE_DESCRIPTION("Niagara2 RNG driver"); @@ -302,26 +302,57 @@ static int n2rng_try_read_ctl(struct n2rng *np) return n2rng_hv_err_trans(hv_err); } -#define CONTROL_DEFAULT_BASE \ - ((2 << RNG_CTL_ASEL_SHIFT) | \ - (N2RNG_ACCUM_CYCLES_DEFAULT << RNG_CTL_WAIT_SHIFT) | \ - RNG_CTL_LFSR) - -#define CONTROL_DEFAULT_0 \ - (CONTROL_DEFAULT_BASE | \ - (1 << RNG_CTL_VCO_SHIFT) | \ - RNG_CTL_ES1) -#define CONTROL_DEFAULT_1 \ - (CONTROL_DEFAULT_BASE | \ - (2 << RNG_CTL_VCO_SHIFT) | \ - RNG_CTL_ES2) -#define CONTROL_DEFAULT_2 \ - (CONTROL_DEFAULT_BASE | \ - (3 << RNG_CTL_VCO_SHIFT) | \ - RNG_CTL_ES3) -#define CONTROL_DEFAULT_3 \ - (CONTROL_DEFAULT_BASE | \ - RNG_CTL_ES1 | RNG_CTL_ES2 | RNG_CTL_ES3) +static u64 n2rng_control_default(struct n2rng *np, int ctl) +{ + u64 val = 0; + + if (np->data->chip_version == 1) { + val = ((2 << RNG_v1_CTL_ASEL_SHIFT) | + (N2RNG_ACCUM_CYCLES_DEFAULT << RNG_v1_CTL_WAIT_SHIFT) | + RNG_CTL_LFSR); + + switch (ctl) { + case 0: + val |= (1 << RNG_v1_CTL_VCO_SHIFT) | RNG_CTL_ES1; + break; + case 1: + val |= (2 << RNG_v1_CTL_VCO_SHIFT) | RNG_CTL_ES2; + break; + case 2: + val |= (3 << RNG_v1_CTL_VCO_SHIFT) | RNG_CTL_ES3; + break; + case 3: + val |= RNG_CTL_ES1 | RNG_CTL_ES2 | RNG_CTL_ES3; + break; + default: + break; + } + + } else { + val = ((2 << RNG_v2_CTL_ASEL_SHIFT) | + (N2RNG_ACCUM_CYCLES_DEFAULT << RNG_v2_CTL_WAIT_SHIFT) | + RNG_CTL_LFSR); + + switch (ctl) { + case 0: + val |= (1 << RNG_v2_CTL_VCO_SHIFT) | RNG_CTL_ES1; + break; + case 1: + val |= (2 << RNG_v2_CTL_VCO_SHIFT) | RNG_CTL_ES2; + break; + case 2: + val |= (3 << RNG_v2_CTL_VCO_SHIFT) | RNG_CTL_ES3; + break; + case 3: + val |= RNG_CTL_ES1 | RNG_CTL_ES2 | RNG_CTL_ES3; + break; + default: + break; + } + } + + return val; +} static void n2rng_control_swstate_init(struct n2rng *np) { @@ -336,10 +367,10 @@ static void n2rng_control_swstate_init(struct n2rng *np) for (i = 0; i < np->num_units; i++) { struct n2rng_unit *up = &np->units[i]; - up->control[0] = CONTROL_DEFAULT_0; - up->control[1] = CONTROL_DEFAULT_1; - up->control[2] = CONTROL_DEFAULT_2; - up->control[3] = CONTROL_DEFAULT_3; + up->control[0] = n2rng_control_default(np, 0); + up->control[1] = n2rng_control_default(np, 1); + up->control[2] = n2rng_control_default(np, 2); + up->control[3] = n2rng_control_default(np, 3); } np->hv_state = HV_RNG_STATE_UNCONFIGURED; @@ -399,6 +430,7 @@ static int n2rng_data_read(struct hwrng *rng, u32 *data) } else { int err = n2rng_generic_read_data(ra); if (!err) { + np->flags |= N2RNG_FLAG_BUFFER_VALID; np->buffer = np->test_data >> 32; *data = np->test_data & 0xffffffff; len = 4; @@ -487,9 +519,21 @@ static void n2rng_dump_test_buffer(struct n2rng *np) static int n2rng_check_selftest_buffer(struct n2rng *np, unsigned long unit) { - u64 val = SELFTEST_VAL; + u64 val; int err, matches, limit; + switch (np->data->id) { + case N2_n2_rng: + case N2_vf_rng: + case N2_kt_rng: + case N2_m4_rng: /* yes, m4 uses the old value */ + val = RNG_v1_SELFTEST_VAL; + break; + default: + val = RNG_v2_SELFTEST_VAL; + break; + } + matches = 0; for (limit = 0; limit < SELFTEST_LOOPS_MAX; limit++) { matches += n2rng_test_buffer_find(np, val); @@ -512,14 +556,32 @@ static int n2rng_check_selftest_buffer(struct n2rng *np, unsigned long unit) static int n2rng_control_selftest(struct n2rng *np, unsigned long unit) { int err; + u64 base, base3; + + switch (np->data->id) { + case N2_n2_rng: + case N2_vf_rng: + case N2_kt_rng: + base = RNG_v1_CTL_ASEL_NOOUT << RNG_v1_CTL_ASEL_SHIFT; + base3 = base | RNG_CTL_LFSR | + ((RNG_v1_SELFTEST_TICKS - 2) << RNG_v1_CTL_WAIT_SHIFT); + break; + case N2_m4_rng: + base = RNG_v2_CTL_ASEL_NOOUT << RNG_v2_CTL_ASEL_SHIFT; + base3 = base | RNG_CTL_LFSR | + ((RNG_v1_SELFTEST_TICKS - 2) << RNG_v2_CTL_WAIT_SHIFT); + break; + default: + base = RNG_v2_CTL_ASEL_NOOUT << RNG_v2_CTL_ASEL_SHIFT; + base3 = base | RNG_CTL_LFSR | + (RNG_v2_SELFTEST_TICKS << RNG_v2_CTL_WAIT_SHIFT); + break; + } - np->test_control[0] = (0x2 << RNG_CTL_ASEL_SHIFT); - np->test_control[1] = (0x2 << RNG_CTL_ASEL_SHIFT); - np->test_control[2] = (0x2 << RNG_CTL_ASEL_SHIFT); - np->test_control[3] = ((0x2 << RNG_CTL_ASEL_SHIFT) | - RNG_CTL_LFSR | - ((SELFTEST_TICKS - 2) << RNG_CTL_WAIT_SHIFT)); - + np->test_control[0] = base; + np->test_control[1] = base; + np->test_control[2] = base; + np->test_control[3] = base3; err = n2rng_entropy_diag_read(np, unit, np->test_control, HV_RNG_STATE_HEALTHCHECK, @@ -557,11 +619,19 @@ static int n2rng_control_configure_units(struct n2rng *np) struct n2rng_unit *up = &np->units[unit]; unsigned long ctl_ra = __pa(&up->control[0]); int esrc; - u64 base; + u64 base, shift; - base = ((np->accum_cycles << RNG_CTL_WAIT_SHIFT) | - (2 << RNG_CTL_ASEL_SHIFT) | - RNG_CTL_LFSR); + if (np->data->chip_version == 1) { + base = ((np->accum_cycles << RNG_v1_CTL_WAIT_SHIFT) | + (RNG_v1_CTL_ASEL_NOOUT << RNG_v1_CTL_ASEL_SHIFT) | + RNG_CTL_LFSR); + shift = RNG_v1_CTL_VCO_SHIFT; + } else { + base = ((np->accum_cycles << RNG_v2_CTL_WAIT_SHIFT) | + (RNG_v2_CTL_ASEL_NOOUT << RNG_v2_CTL_ASEL_SHIFT) | + RNG_CTL_LFSR); + shift = RNG_v2_CTL_VCO_SHIFT; + } /* XXX This isn't the best. We should fetch a bunch * XXX of words using each entropy source combined XXX @@ -570,7 +640,7 @@ static int n2rng_control_configure_units(struct n2rng *np) */ for (esrc = 0; esrc < 3; esrc++) up->control[esrc] = base | - (esrc << RNG_CTL_VCO_SHIFT) | + (esrc << shift) | (RNG_CTL_ES1 << esrc); up->control[3] = base | @@ -589,6 +659,7 @@ static void n2rng_work(struct work_struct *work) { struct n2rng *np = container_of(work, struct n2rng, work.work); int err = 0; + static int retries = 4; if (!(np->flags & N2RNG_FLAG_CONTROL)) { err = n2rng_guest_check(np); @@ -606,7 +677,9 @@ static void n2rng_work(struct work_struct *work) dev_info(&np->op->dev, "RNG ready\n"); } - if (err && !(np->flags & N2RNG_FLAG_SHUTDOWN)) + if (--retries == 0) + dev_err(&np->op->dev, "Self-test retries failed, RNG not ready\n"); + else if (err && !(np->flags & N2RNG_FLAG_SHUTDOWN)) schedule_delayed_work(&np->work, HZ * 2); } @@ -622,24 +695,23 @@ static const struct of_device_id n2rng_match[]; static int n2rng_probe(struct platform_device *op) { const struct of_device_id *match; - int multi_capable; int err = -ENOMEM; struct n2rng *np; match = of_match_device(n2rng_match, &op->dev); if (!match) return -EINVAL; - multi_capable = (match->data != NULL); n2rng_driver_version(); np = devm_kzalloc(&op->dev, sizeof(*np), GFP_KERNEL); if (!np) goto out; np->op = op; + np->data = (struct n2rng_template *)match->data; INIT_DELAYED_WORK(&np->work, n2rng_work); - if (multi_capable) + if (np->data->multi_capable) np->flags |= N2RNG_FLAG_MULTI; err = -ENODEV; @@ -670,8 +742,9 @@ static int n2rng_probe(struct platform_device *op) dev_err(&op->dev, "VF RNG lacks rng-#units property\n"); goto out_hvapi_unregister; } - } else + } else { np->num_units = 1; + } dev_info(&op->dev, "Registered RNG HVAPI major %lu minor %lu\n", np->hvapi_major, np->hvapi_minor); @@ -692,7 +765,7 @@ static int n2rng_probe(struct platform_device *op) "multi-unit-capable" : "single-unit"), np->num_units); - np->hwrng.name = "n2rng"; + np->hwrng.name = DRV_MODULE_NAME; np->hwrng.data_read = n2rng_data_read; np->hwrng.priv = (unsigned long) np; @@ -728,30 +801,61 @@ static int n2rng_remove(struct platform_device *op) return 0; } +static struct n2rng_template n2_template = { + .id = N2_n2_rng, + .multi_capable = 0, + .chip_version = 1, +}; + +static struct n2rng_template vf_template = { + .id = N2_vf_rng, + .multi_capable = 1, + .chip_version = 1, +}; + +static struct n2rng_template kt_template = { + .id = N2_kt_rng, + .multi_capable = 1, + .chip_version = 1, +}; + +static struct n2rng_template m4_template = { + .id = N2_m4_rng, + .multi_capable = 1, + .chip_version = 2, +}; + +static struct n2rng_template m7_template = { + .id = N2_m7_rng, + .multi_capable = 1, + .chip_version = 2, +}; + static const struct of_device_id n2rng_match[] = { { .name = "random-number-generator", .compatible = "SUNW,n2-rng", + .data = &n2_template, }, { .name = "random-number-generator", .compatible = "SUNW,vf-rng", - .data = (void *) 1, + .data = &vf_template, }, { .name = "random-number-generator", .compatible = "SUNW,kt-rng", - .data = (void *) 1, + .data = |