diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/crypto/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/crypto/nx/Kconfig | 35 | ||||
| -rw-r--r-- | drivers/crypto/nx/Makefile | 4 | ||||
| -rw-r--r-- | drivers/crypto/nx/nx-842-pseries.c | 57 | ||||
| -rw-r--r-- | drivers/crypto/nx/nx-842.c | 144 | ||||
| -rw-r--r-- | drivers/crypto/nx/nx-842.h | 32 |
6 files changed, 238 insertions, 44 deletions
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index 8a76a01..0889e49 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -330,11 +330,13 @@ config CRYPTO_DEV_S5P algorithms execution. config CRYPTO_DEV_NX - bool "Support for IBM Power7+ in-Nest cryptographic acceleration" - depends on PPC64 && IBMVIO && !CPU_LITTLE_ENDIAN - default n + bool "Support for IBM PowerPC Nest (NX) cryptographic acceleration" + depends on PPC64 help - Support for Power7+ in-Nest cryptographic acceleration. + This enables support for the NX hardware cryptographic accelerator + coprocessor that is in IBM PowerPC P7+ or later processors. This + does not actually enable any drivers, it only allows you to select + which acceleration type (encryption and/or compression) to enable. if CRYPTO_DEV_NX source "drivers/crypto/nx/Kconfig" diff --git a/drivers/crypto/nx/Kconfig b/drivers/crypto/nx/Kconfig index f826166..34013f7 100644 --- a/drivers/crypto/nx/Kconfig +++ b/drivers/crypto/nx/Kconfig @@ -1,7 +1,9 @@ + config CRYPTO_DEV_NX_ENCRYPT - tristate "Encryption acceleration support" - depends on PPC64 && IBMVIO + tristate "Encryption acceleration support on pSeries platform" + depends on PPC_PSERIES && IBMVIO && !CPU_LITTLE_ENDIAN default y + select CRYPTO_ALGAPI select CRYPTO_AES select CRYPTO_CBC select CRYPTO_ECB @@ -12,15 +14,30 @@ config CRYPTO_DEV_NX_ENCRYPT select CRYPTO_SHA256 select CRYPTO_SHA512 help - Support for Power7+ in-Nest encryption acceleration. This - module supports acceleration for AES and SHA2 algorithms. If you - choose 'M' here, this module will be called nx_crypto. + Support for PowerPC Nest (NX) encryption acceleration. This + module supports acceleration for AES and SHA2 algorithms on + the pSeries platform. If you choose 'M' here, this module + will be called nx_crypto. config CRYPTO_DEV_NX_COMPRESS tristate "Compression acceleration support" - depends on PPC64 && IBMVIO default y help - Support for Power7+ in-Nest compression acceleration. This - module supports acceleration for AES and SHA2 algorithms. If you - choose 'M' here, this module will be called nx_compress. + Support for PowerPC Nest (NX) compression acceleration. This + module supports acceleration for compressing memory with the 842 + algorithm. One of the platform drivers must be selected also. + If you choose 'M' here, this module will be called nx_compress. + +if CRYPTO_DEV_NX_COMPRESS + +config CRYPTO_DEV_NX_COMPRESS_PSERIES + tristate "Compression acceleration support on pSeries platform" + depends on PPC_PSERIES && IBMVIO && !CPU_LITTLE_ENDIAN + default y + help + Support for PowerPC Nest (NX) compression acceleration. This + module supports acceleration for compressing memory with the 842 + algorithm. This supports NX hardware on the pSeries platform. + If you choose 'M' here, this module will be called nx_compress_pseries. + +endif diff --git a/drivers/crypto/nx/Makefile b/drivers/crypto/nx/Makefile index 8669ffa..5d9f4bc 100644 --- a/drivers/crypto/nx/Makefile +++ b/drivers/crypto/nx/Makefile @@ -11,4 +11,6 @@ nx-crypto-objs := nx.o \ nx-sha512.o obj-$(CONFIG_CRYPTO_DEV_NX_COMPRESS) += nx-compress.o -nx-compress-objs := nx-842-pseries.o +obj-$(CONFIG_CRYPTO_DEV_NX_COMPRESS_PSERIES) += nx-compress-pseries.o +nx-compress-objs := nx-842.o +nx-compress-pseries-objs := nx-842-pseries.o diff --git a/drivers/crypto/nx/nx-842-pseries.c b/drivers/crypto/nx/nx-842-pseries.c index 887196e..9b83c9e 100644 --- a/drivers/crypto/nx/nx-842-pseries.c +++ b/drivers/crypto/nx/nx-842-pseries.c @@ -21,18 +21,13 @@ * Seth Jennings <sjenning@linux.vnet.ibm.com> */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/nx842.h> -#include <linux/of.h> -#include <linux/slab.h> - #include <asm/page.h> #include <asm/vio.h> +#include "nx-842.h" #include "nx_csbcpb.h" /* struct nx_csbcpb */ -#define MODULE_NAME "nx-compress" +#define MODULE_NAME NX842_PSERIES_MODULE_NAME MODULE_LICENSE("GPL"); MODULE_AUTHOR("Robert Jennings <rcj@linux.vnet.ibm.com>"); MODULE_DESCRIPTION("842 H/W Compression driver for IBM Power processors"); @@ -236,18 +231,6 @@ struct nx842_workmem { }; }; -int nx842_get_workmem_size(void) -{ - return sizeof(struct nx842_workmem) + NX842_HW_PAGE_SIZE; -} -EXPORT_SYMBOL_GPL(nx842_get_workmem_size); - -int nx842_get_workmem_size_aligned(void) -{ - return sizeof(struct nx842_workmem); -} -EXPORT_SYMBOL_GPL(nx842_get_workmem_size_aligned); - static int nx842_validate_result(struct device *dev, struct cop_status_block *csb) { @@ -300,7 +283,7 @@ static int nx842_validate_result(struct device *dev, } /** - * nx842_compress - Compress data using the 842 algorithm + * nx842_pseries_compress - Compress data using the 842 algorithm * * Compression provide by the NX842 coprocessor on IBM Power systems. * The input buffer is compressed and the result is stored in the @@ -315,7 +298,7 @@ static int nx842_validate_result(struct device *dev, * @out: Pointer to output buffer * @outlen: Length of output buffer * @wrkmem: ptr to buffer for working memory, size determined by - * nx842_get_workmem_size() + * NX842_MEM_COMPRESS * * Returns: * 0 Success, output of length @outlen stored in the buffer at @out @@ -325,8 +308,9 @@ static int nx842_validate_result(struct device *dev, * -EIO Internal error * -ENODEV Hardware unavailable */ -int nx842_compress(const unsigned char *in, unsigned int inlen, - unsigned char *out, unsigned int *outlen, void *wmem) +static int nx842_pseries_compress(const unsigned char *in, unsigned int inlen, + unsigned char *out, unsigned int *outlen, + void *wmem) { struct nx842_header *hdr; struct nx842_devdata *local_devdata; @@ -493,13 +477,12 @@ unlock: rcu_read_unlock(); return ret; } -EXPORT_SYMBOL_GPL(nx842_compress); static int sw842_decompress(const unsigned char *, int, unsigned char *, int *, const void *); /** - * nx842_decompress - Decompress data using the 842 algorithm + * nx842_pseries_decompress - Decompress data using the 842 algorithm * * Decompression provide by the NX842 coprocessor on IBM Power systems. * The input buffer is decompressed and the result is stored in the @@ -515,7 +498,7 @@ static int sw842_decompress(const unsigned char *, int, unsigned char *, int *, * @out: Pointer to output buffer, must be page aligned * @outlen: Length of output buffer, must be PAGE_SIZE * @wrkmem: ptr to buffer for working memory, size determined by - * nx842_get_workmem_size() + * NX842_MEM_COMPRESS * * Returns: * 0 Success, output of length @outlen stored in the buffer at @out @@ -525,8 +508,9 @@ static int sw842_decompress(const unsigned char *, int, unsigned char *, int *, * -EINVAL Bad input data encountered when attempting decompress * -EIO Internal error */ -int nx842_decompress(const unsigned char *in, unsigned int inlen, - unsigned char *out, unsigned int *outlen, void *wmem) +static int nx842_pseries_decompress(const unsigned char *in, unsigned int inlen, + unsigned char *out, unsigned int *outlen, + void *wmem) { struct nx842_header *hdr; struct nx842_devdata *local_devdata; @@ -694,7 +678,6 @@ unlock: rcu_read_unlock(); return ret; } -EXPORT_SYMBOL_GPL(nx842_decompress); /** * nx842_OF_set_defaults -- Set default (disabled) values for devdata @@ -1130,6 +1113,12 @@ static struct attribute_group nx842_attribute_group = { .attrs = nx842_sysfs_entries, }; +static struct nx842_driver nx842_pseries_driver = { + .owner = THIS_MODULE, + .compress = nx842_pseries_compress, + .decompress = nx842_pseries_decompress, +}; + static int __init nx842_probe(struct vio_dev *viodev, const struct vio_device_id *id) { @@ -1192,6 +1181,8 @@ static int __init nx842_probe(struct vio_dev *viodev, goto error; } + nx842_register_driver(&nx842_pseries_driver); + return 0; error_unlock: @@ -1222,11 +1213,14 @@ static int __exit nx842_remove(struct vio_dev *viodev) if (old_devdata) kfree(old_devdata->counters); kfree(old_devdata); + + nx842_unregister_driver(&nx842_pseries_driver); + return 0; } static struct vio_device_id nx842_driver_ids[] = { - {"ibm,compression-v1", "ibm,compression"}, + {NX842_PSERIES_COMPAT_NAME "-v1", NX842_PSERIES_COMPAT_NAME}, {"", ""}, }; @@ -1243,6 +1237,8 @@ static int __init nx842_init(void) struct nx842_devdata *new_devdata; pr_info("Registering IBM Power 842 compression driver\n"); + BUILD_BUG_ON(sizeof(struct nx842_workmem) > NX842_MEM_COMPRESS); + RCU_INIT_POINTER(devdata, NULL); new_devdata = kzalloc(sizeof(*new_devdata), GFP_KERNEL); if (!new_devdata) { @@ -1272,6 +1268,7 @@ static void __exit nx842_exit(void) if (old_devdata) dev_set_drvdata(old_devdata->dev, NULL); kfree(old_devdata); + nx842_unregister_driver(&nx842_pseries_driver); vio_unregister_driver(&nx842_driver); } diff --git a/drivers/crypto/nx/nx-842.c b/drivers/crypto/nx/nx-842.c new file mode 100644 index 0000000..f1f378e --- /dev/null +++ b/drivers/crypto/nx/nx-842.c @@ -0,0 +1,144 @@ +/* + * Driver frontend for IBM Power 842 compression accelerator + * + * Copyright (C) 2015 Dan Streetman, IBM Corp + * + * Designer of the Power data compression engine: + * Bulent Abali <abali@us.ibm.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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include "nx-842.h" + +#define MODULE_NAME "nx-compress" +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Dan Streetman <ddstreet@ieee.org>"); +MODULE_DESCRIPTION("842 H/W Compression driver for IBM Power processors"); + +/* Only one driver is expected, based on the HW platform */ +static struct nx842_driver *nx842_driver; +static DEFINE_SPINLOCK(nx842_driver_lock); /* protects driver pointers */ + +void nx842_register_driver(struct nx842_driver *driver) +{ + spin_lock(&nx842_driver_lock); + + if (nx842_driver) { + pr_err("can't register driver %s, already using driver %s\n", + driver->owner->name, nx842_driver->owner->name); + } else { + pr_info("registering driver %s\n", driver->owner->name); + nx842_driver = driver; + } + + spin_unlock(&nx842_driver_lock); +} +EXPORT_SYMBOL_GPL(nx842_register_driver); + +void nx842_unregister_driver(struct nx842_driver *driver) +{ + spin_lock(&nx842_driver_lock); + + if (nx842_driver == driver) { + pr_info("unregistering driver %s\n", driver->owner->name); + nx842_driver = NULL; + } else if (nx842_driver) { + pr_err("can't unregister driver %s, using driver %s\n", + driver->owner->name, nx842_driver->owner->name); + } else { + pr_err("can't unregister driver %s, no driver in use\n", + driver->owner->name); + } + + spin_unlock(&nx842_driver_lock); +} +EXPORT_SYMBOL_GPL(nx842_unregister_driver); + +static struct nx842_driver *get_driver(void) +{ + struct nx842_driver *driver = NULL; + + spin_lock(&nx842_driver_lock); + + driver = nx842_driver; + + if (driver && !try_module_get(driver->owner)) + driver = NULL; + + spin_unlock(&nx842_driver_lock); + + return driver; +} + +static void put_driver(struct nx842_driver *driver) +{ + module_put(driver->owner); +} + +int nx842_compress(const unsigned char *in, unsigned int in_len, + unsigned char *out, unsigned int *out_len, + void *wrkmem) +{ + struct nx842_driver *driver = get_driver(); + int ret; + + if (!driver) + return -ENODEV; + + ret = driver->compress(in, in_len, out, out_len, wrkmem); + + put_driver(driver); + + return ret; +} +EXPORT_SYMBOL_GPL(nx842_compress); + +int nx842_decompress(const unsigned char *in, unsigned int in_len, + unsigned char *out, unsigned int *out_len, + void *wrkmem) +{ + struct nx842_driver *driver = get_driver(); + int ret; + + if (!driver) + return -ENODEV; + + ret = driver->decompress(in, in_len, out, out_len, wrkmem); + + put_driver(driver); + + return ret; +} +EXPORT_SYMBOL_GPL(nx842_decompress); + +static __init int nx842_init(void) +{ + pr_info("loading\n"); + + if (of_find_compatible_node(NULL, NULL, NX842_PSERIES_COMPAT_NAME)) + request_module_nowait(NX842_PSERIES_MODULE_NAME); + else + pr_err("no nx842 driver found.\n"); + + pr_info("loaded\n"); + + return 0; +} +module_init(nx842_init); + +static void __exit nx842_exit(void) +{ + pr_info("NX842 unloaded\n"); +} +module_exit(nx842_exit); diff --git a/drivers/crypto/nx/nx-842.h b/drivers/crypto/nx/nx-842.h new file mode 100644 index 0000000..2a5d4e1 --- /dev/null +++ b/drivers/crypto/nx/nx-842.h @@ -0,0 +1,32 @@ + +#ifndef __NX_842_H__ +#define __NX_842_H__ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/nx842.h> +#include <linux/of.h> +#include <linux/slab.h> +#include <linux/io.h> + +struct nx842_driver { + struct module *owner; + + int (*compress)(const unsigned char *in, unsigned int in_len, + unsigned char *out, unsigned int *out_len, + void *wrkmem); + int (*decompress)(const unsigned char *in, unsigned int in_len, + unsigned char *out, unsigned int *out_len, + void *wrkmem); +}; + +void nx842_register_driver(struct nx842_driver *driver); +void nx842_unregister_driver(struct nx842_driver *driver); + + +/* To allow the main nx-compress module to load platform module */ +#define NX842_PSERIES_MODULE_NAME "nx-compress-pseries" +#define NX842_PSERIES_COMPAT_NAME "ibm,compression" + + +#endif /* __NX_842_H__ */ |