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-rw-r--r--drivers/char/hw_random/Kconfig19
-rw-r--r--drivers/char/hw_random/Makefile3
-rw-r--r--drivers/char/hw_random/amd-rng.c2
-rw-r--r--drivers/char/hw_random/core.c39
-rw-r--r--drivers/char/hw_random/geode-rng.c2
-rw-r--r--drivers/char/hw_random/intel-rng.c34
-rw-r--r--drivers/char/hw_random/ixp4xx-rng.c2
-rw-r--r--drivers/char/hw_random/via-rng.c2
8 files changed, 68 insertions, 35 deletions
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 9f7635f7517..5f3acd8e64b 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -3,17 +3,20 @@
#
config HW_RANDOM
- bool "Hardware Random Number Generator Core support"
- default y
+ tristate "Hardware Random Number Generator Core support"
+ default m
---help---
Hardware Random Number Generator Core infrastructure.
+ To compile this driver as a module, choose M here: the
+ module will be called rng-core.
+
If unsure, say Y.
config HW_RANDOM_INTEL
tristate "Intel HW Random Number Generator support"
depends on HW_RANDOM && (X86 || IA64) && PCI
- default y
+ default HW_RANDOM
---help---
This driver provides kernel-side support for the Random Number
Generator hardware found on Intel i8xx-based motherboards.
@@ -26,7 +29,7 @@ config HW_RANDOM_INTEL
config HW_RANDOM_AMD
tristate "AMD HW Random Number Generator support"
depends on HW_RANDOM && X86 && PCI
- default y
+ default HW_RANDOM
---help---
This driver provides kernel-side support for the Random Number
Generator hardware found on AMD 76x-based motherboards.
@@ -39,7 +42,7 @@ config HW_RANDOM_AMD
config HW_RANDOM_GEODE
tristate "AMD Geode HW Random Number Generator support"
depends on HW_RANDOM && X86 && PCI
- default y
+ default HW_RANDOM
---help---
This driver provides kernel-side support for the Random Number
Generator hardware found on the AMD Geode LX.
@@ -52,7 +55,7 @@ config HW_RANDOM_GEODE
config HW_RANDOM_VIA
tristate "VIA HW Random Number Generator support"
depends on HW_RANDOM && X86_32
- default y
+ default HW_RANDOM
---help---
This driver provides kernel-side support for the Random Number
Generator hardware found on VIA based motherboards.
@@ -65,7 +68,7 @@ config HW_RANDOM_VIA
config HW_RANDOM_IXP4XX
tristate "Intel IXP4xx NPU HW Random Number Generator support"
depends on HW_RANDOM && ARCH_IXP4XX
- default y
+ default HW_RANDOM
---help---
This driver provides kernel-side support for the Random
Number Generator hardware found on the Intel IXP4xx NPU.
@@ -78,7 +81,7 @@ config HW_RANDOM_IXP4XX
config HW_RANDOM_OMAP
tristate "OMAP Random Number Generator support"
depends on HW_RANDOM && (ARCH_OMAP16XX || ARCH_OMAP24XX)
- default y
+ default HW_RANDOM
---help---
This driver provides kernel-side support for the Random Number
Generator hardware found on OMAP16xx and OMAP24xx multimedia
diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile
index e263ae96f94..c41fa19454e 100644
--- a/drivers/char/hw_random/Makefile
+++ b/drivers/char/hw_random/Makefile
@@ -2,7 +2,8 @@
# Makefile for HW Random Number Generator (RNG) device drivers.
#
-obj-$(CONFIG_HW_RANDOM) += core.o
+obj-$(CONFIG_HW_RANDOM) += rng-core.o
+rng-core-y := core.o
obj-$(CONFIG_HW_RANDOM_INTEL) += intel-rng.o
obj-$(CONFIG_HW_RANDOM_AMD) += amd-rng.o
obj-$(CONFIG_HW_RANDOM_GEODE) += geode-rng.o
diff --git a/drivers/char/hw_random/amd-rng.c b/drivers/char/hw_random/amd-rng.c
index 71e4e0f3fd5..556fd81fa81 100644
--- a/drivers/char/hw_random/amd-rng.c
+++ b/drivers/char/hw_random/amd-rng.c
@@ -144,7 +144,7 @@ static void __exit mod_exit(void)
hwrng_unregister(&amd_rng);
}
-subsys_initcall(mod_init);
+module_init(mod_init);
module_exit(mod_exit);
MODULE_AUTHOR("The Linux Kernel team");
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index 154a81d328c..26a860adcb3 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -36,6 +36,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fs.h>
+#include <linux/sched.h>
#include <linux/init.h>
#include <linux/miscdevice.h>
#include <linux/delay.h>
@@ -162,7 +163,8 @@ static struct miscdevice rng_miscdev = {
};
-static ssize_t hwrng_attr_current_store(struct class_device *class,
+static ssize_t hwrng_attr_current_store(struct device *dev,
+ struct device_attribute *attr,
const char *buf, size_t len)
{
int err;
@@ -192,7 +194,8 @@ static ssize_t hwrng_attr_current_store(struct class_device *class,
return err ? : len;
}
-static ssize_t hwrng_attr_current_show(struct class_device *class,
+static ssize_t hwrng_attr_current_show(struct device *dev,
+ struct device_attribute *attr,
char *buf)
{
int err;
@@ -210,7 +213,8 @@ static ssize_t hwrng_attr_current_show(struct class_device *class,
return ret;
}
-static ssize_t hwrng_attr_available_show(struct class_device *class,
+static ssize_t hwrng_attr_available_show(struct device *dev,
+ struct device_attribute *attr,
char *buf)
{
int err;
@@ -234,20 +238,18 @@ static ssize_t hwrng_attr_available_show(struct class_device *class,
return ret;
}
-static CLASS_DEVICE_ATTR(rng_current, S_IRUGO | S_IWUSR,
- hwrng_attr_current_show,
- hwrng_attr_current_store);
-static CLASS_DEVICE_ATTR(rng_available, S_IRUGO,
- hwrng_attr_available_show,
- NULL);
+static DEVICE_ATTR(rng_current, S_IRUGO | S_IWUSR,
+ hwrng_attr_current_show,
+ hwrng_attr_current_store);
+static DEVICE_ATTR(rng_available, S_IRUGO,
+ hwrng_attr_available_show,
+ NULL);
static void unregister_miscdev(void)
{
- class_device_remove_file(rng_miscdev.class,
- &class_device_attr_rng_available);
- class_device_remove_file(rng_miscdev.class,
- &class_device_attr_rng_current);
+ device_remove_file(rng_miscdev.this_device, &dev_attr_rng_available);
+ device_remove_file(rng_miscdev.this_device, &dev_attr_rng_current);
misc_deregister(&rng_miscdev);
}
@@ -258,20 +260,19 @@ static int register_miscdev(void)
err = misc_register(&rng_miscdev);
if (err)
goto out;
- err = class_device_create_file(rng_miscdev.class,
- &class_device_attr_rng_current);
+ err = device_create_file(rng_miscdev.this_device,
+ &dev_attr_rng_current);
if (err)
goto err_misc_dereg;
- err = class_device_create_file(rng_miscdev.class,
- &class_device_attr_rng_available);
+ err = device_create_file(rng_miscdev.this_device,
+ &dev_attr_rng_available);
if (err)
goto err_remove_current;
out:
return err;
err_remove_current:
- class_device_remove_file(rng_miscdev.class,
- &class_device_attr_rng_current);
+ device_remove_file(rng_miscdev.this_device, &dev_attr_rng_current);
err_misc_dereg:
misc_deregister(&rng_miscdev);
goto out;
diff --git a/drivers/char/hw_random/geode-rng.c b/drivers/char/hw_random/geode-rng.c
index d37ced0d132..8e8658dcd2e 100644
--- a/drivers/char/hw_random/geode-rng.c
+++ b/drivers/char/hw_random/geode-rng.c
@@ -125,7 +125,7 @@ static void __exit mod_exit(void)
iounmap(mem);
}
-subsys_initcall(mod_init);
+module_init(mod_init);
module_exit(mod_exit);
MODULE_DESCRIPTION("H/W RNG driver for AMD Geode LX CPUs");
diff --git a/drivers/char/hw_random/intel-rng.c b/drivers/char/hw_random/intel-rng.c
index 8efbc9c0e54..f22e78e3c70 100644
--- a/drivers/char/hw_random/intel-rng.c
+++ b/drivers/char/hw_random/intel-rng.c
@@ -143,6 +143,11 @@ static const struct pci_device_id pci_tbl[] = {
};
MODULE_DEVICE_TABLE(pci, pci_tbl);
+static __initdata int no_fwh_detect;
+module_param(no_fwh_detect, int, 0);
+MODULE_PARM_DESC(no_fwh_detect, "Skip FWH detection:\n"
+ " positive value - skip if FWH space locked read-only\n"
+ " negative value - skip always");
static inline u8 hwstatus_get(void __iomem *mem)
{
@@ -240,6 +245,11 @@ static int __init mod_init(void)
if (!dev)
goto out; /* Device not found. */
+ if (no_fwh_detect < 0) {
+ pci_dev_put(dev);
+ goto fwh_done;
+ }
+
/* Check for Intel 82802 */
if (dev->device < 0x2640) {
fwh_dec_en1_off = FWH_DEC_EN1_REG_OLD;
@@ -252,6 +262,23 @@ static int __init mod_init(void)
pci_read_config_byte(dev, fwh_dec_en1_off, &fwh_dec_en1_val);
pci_read_config_byte(dev, bios_cntl_off, &bios_cntl_val);
+ if ((bios_cntl_val &
+ (BIOS_CNTL_LOCK_ENABLE_MASK|BIOS_CNTL_WRITE_ENABLE_MASK))
+ == BIOS_CNTL_LOCK_ENABLE_MASK) {
+ static __initdata /*const*/ char warning[] =
+ KERN_WARNING PFX "Firmware space is locked read-only. If you can't or\n"
+ KERN_WARNING PFX "don't want to disable this in firmware setup, and if\n"
+ KERN_WARNING PFX "you are certain that your system has a functional\n"
+ KERN_WARNING PFX "RNG, try using the 'no_fwh_detect' option.\n";
+
+ pci_dev_put(dev);
+ if (no_fwh_detect)
+ goto fwh_done;
+ printk(warning);
+ err = -EBUSY;
+ goto out;
+ }
+
mem = ioremap_nocache(INTEL_FWH_ADDR, INTEL_FWH_ADDR_LEN);
if (mem == NULL) {
pci_dev_put(dev);
@@ -280,8 +307,7 @@ static int __init mod_init(void)
pci_write_config_byte(dev,
fwh_dec_en1_off,
fwh_dec_en1_val | FWH_F8_EN_MASK);
- if (!(bios_cntl_val &
- (BIOS_CNTL_LOCK_ENABLE_MASK|BIOS_CNTL_WRITE_ENABLE_MASK)))
+ if (!(bios_cntl_val & BIOS_CNTL_WRITE_ENABLE_MASK))
pci_write_config_byte(dev,
bios_cntl_off,
bios_cntl_val | BIOS_CNTL_WRITE_ENABLE_MASK);
@@ -315,6 +341,8 @@ static int __init mod_init(void)
goto out;
}
+fwh_done:
+
err = -ENOMEM;
mem = ioremap(INTEL_RNG_ADDR, INTEL_RNG_ADDR_LEN);
if (!mem)
@@ -350,7 +378,7 @@ static void __exit mod_exit(void)
iounmap(mem);
}
-subsys_initcall(mod_init);
+module_init(mod_init);
module_exit(mod_exit);
MODULE_DESCRIPTION("H/W RNG driver for Intel chipsets");
diff --git a/drivers/char/hw_random/ixp4xx-rng.c b/drivers/char/hw_random/ixp4xx-rng.c
index c9caff57db8..bab43ca32ac 100644
--- a/drivers/char/hw_random/ixp4xx-rng.c
+++ b/drivers/char/hw_random/ixp4xx-rng.c
@@ -64,7 +64,7 @@ static void __exit ixp4xx_rng_exit(void)
iounmap(rng_base);
}
-subsys_initcall(ixp4xx_rng_init);
+module_init(ixp4xx_rng_init);
module_exit(ixp4xx_rng_exit);
MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>");
diff --git a/drivers/char/hw_random/via-rng.c b/drivers/char/hw_random/via-rng.c
index 0e786b617bb..9ebf84d1865 100644
--- a/drivers/char/hw_random/via-rng.c
+++ b/drivers/char/hw_random/via-rng.c
@@ -176,7 +176,7 @@ static void __exit mod_exit(void)
hwrng_unregister(&via_rng);
}
-subsys_initcall(mod_init);
+module_init(mod_init);
module_exit(mod_exit);
MODULE_DESCRIPTION("H/W RNG driver for VIA chipsets");
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-30 14:22:35 +0000