lzo.c « crypto - litmus-rt.git - The LITMUS^RT kernel.

/* * linux/arch/arm/mach-pxa/leds-lubbock.c * * Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu> * * Copyright (c) 2001 Jeff Sutherland <jeffs@accelent.com> * * Original (leds-footbridge.c) by Russell King * * Major surgery on April 2004 by Nicolas Pitre for less global * namespace collision. Mostly adapted the Mainstone version. */#include <linux/init.h>#include <mach/hardware.h>#include <asm/leds.h>#include <asm/system.h>#include <mach/pxa25x.h>#include <mach/lubbock.h>#include"leds.h"/* * 8 discrete leds available for general use: * * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays * so be sure to not monkey with them here. */#define D28 (1 << 0)#define D27 (1 << 1)#define D26 (1 << 2)#define D25 (1 << 3)#define D24 (1 << 4)#define D23 (1 << 5)#define D22 (1 << 6)#define D21 (1 << 7)#define LED_STATE_ENABLED 1#define LED_STATE_CLAIMED 2static unsigned int led_state;static unsigned int hw_led_state;voidlubbock_leds_event(led_event_t evt){unsigned long flags;local_irq_save(flags);switch(evt) {case led_start21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 5 hw_led_state = 0; break; #ifdef CONFIG_LEDS_TIMER case led_timer: hw_led_state ^= D26; break; #endif #ifdef CONFIG_LEDS_CPU case led_idle_start: hw_led_state &= ~D27; break; case led_idle_end: hw_led_state |= D27; break; #endif case led_halted: break; case led_green_on: hw_led_state |= D21; break; case led_green_off: hw_led_state &= ~D21; break; case led_amber_on: hw_led_state /* * Cryptographic API. * * 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., 51 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #include <linux/init.h> #include <linux/module.h> #include <linux/crypto.h> #include <linux/vmalloc.h> #include <linux/lzo.h> struct lzo_ctx { void *lzo_comp_mem; }; static int lzo_init(struct crypto_tfm *tfm) { struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); ctx->lzo_comp_mem = vmalloc(LZO1X_MEM_COMPRESS); if (!ctx->lzo_comp_mem) return -ENOMEM; return 0; } static void lzo_exit(struct crypto_tfm *tfm) { struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); vfree(ctx->lzo_comp_mem); } static int lzo_compress(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) { struct lzo_ctx *ctx = crypto_tfm_ctx(tfm); size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */ int err; err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx->lzo_comp_mem); if (err != LZO_E_OK) return -EINVAL; *dlen = tmp_len; return 0; } static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) { int err; size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */ err = lzo1x_decompress_safe(src, slen, dst, &tmp_len); if (err != LZO_E_OK) return -EINVAL; *dlen = tmp_len; return 0; } static struct crypto_alg alg = { .cra_name = "lzo", .cra_flags = CRYPTO_ALG_TYPE_COMPRESS, .cra_ctxsize = sizeof(struct lzo_ctx), .cra_module = THIS_MODULE, .cra_list = LIST_HEAD_INIT(alg.cra_list), .cra_init = lzo_init, .cra_exit = lzo_exit, .cra_u = { .compress = { .coa_compress = lzo_compress, .coa_decompress = lzo_decompress } } }; static int __init lzo_mod_init(void) { return crypto_register_alg(&alg); } static void __exit lzo_mod_fini(void) { crypto_unregister_alg(&alg); } module_init(lzo_mod_init); module_exit(lzo_mod_fini); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("LZO Compression Algorithm");

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Bjoern Brandenburg