OpenWrt – Rev 1
?pathlinks?
/******************************************************************************
**
** FILE NAME : ifxmips_async_des.c
** PROJECT : IFX UEIP
** MODULES : DEU Module
**
** DATE : October 11, 2010
** AUTHOR : Mohammad Firdaus
** DESCRIPTION : Data Encryption Unit Driver for DES Algorithm
** COPYRIGHT : Copyright (c) 2010
** Infineon Technologies AG
** Am Campeon 1-12, 85579 Neubiberg, Germany
**
** 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.
**
** HISTORY
** $Date $Author $Comment
** 08,Sept 2009 Mohammad Firdaus Initial UEIP release
** 11, Oct 2010 Mohammad Firdaus Kernel Port incl. Async. Ablkcipher mode
** 21,March 2011 Mohammad Firdaus Changes for Kernel 2.6.32 and IPSec integration
*******************************************************************************/
/*!
\defgroup IFX_DEU IFX_DEU_DRIVERS
\ingroup API
\brief ifx DEU driver module
*/
/*!
\file ifxmips_async_des.c
\ingroup IFX_DEU
\brief DES Encryption Driver main file
*/
/*!
\defgroup IFX_DES_FUNCTIONS IFX_DES_FUNCTIONS
\ingroup IFX_DEU
\brief IFX DES driver Functions
*/
#include <linux/wait.h>
#include <linux/crypto.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <crypto/ctr.h>
#include <crypto/aes.h>
#include <crypto/algapi.h>
#include <crypto/scatterwalk.h>
#include <asm/ifx/ifx_regs.h>
#include <asm/ifx/ifx_types.h>
#include <asm/ifx/common_routines.h>
#include <asm/ifx/irq.h>
#include <asm/ifx/ifx_pmu.h>
#include <asm/ifx/ifx_gpio.h>
#include <asm/kmap_types.h>
#include "ifxmips_deu.h"
#if defined(CONFIG_DANUBE)
#include "ifxmips_deu_danube.h"
extern int ifx_danube_pre_1_4;
#elif defined(CONFIG_AR9)
#include "ifxmips_deu_ar9.h"
#elif defined(CONFIG_VR9) || defined(CONFIG_AR10)
#include "ifxmips_deu_vr9.h"
#else
#error "Unkown platform"
#endif
/* DMA specific header and variables */
spinlock_t des_lock;
#define CRTCL_SECT_INIT spin_lock_init(&des_lock)
#define CRTCL_SECT_START spin_lock_irqsave(&des_lock, flag)
#define CRTCL_SECT_END spin_unlock_irqrestore(&des_lock, flag)
/* Preprocessor declerations */
#ifdef CRYPTO_DEBUG
extern char debug_level;
#define DPRINTF(level, format, args...) if (level < debug_level) printk(KERN_INFO "[%s %s %d]: " format, __FILE__, __func__, __LINE__, ##args);
#else
#define DPRINTF(level, format, args...)
#endif
//#define DES_3DES_START IFX_DES_CON
#define DES_KEY_SIZE 8
#define DES_EXPKEY_WORDS 32
#define DES_BLOCK_SIZE 8
#define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE)
#define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS)
#define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE
/* Function Declaration to prevent warning messages */
void des_chip_init (void);
u32 endian_swap(u32 input);
u32 input_swap(u32 input);
int aes_memory_allocate(int value);
int des_memory_allocate(int value);
void memory_release(u32 *buffer);
u32* memory_alignment(const u8 *arg, u32 *buff_alloc, int in_out, int nbytes);
void aes_dma_memory_copy(u32 *outcopy, u32 *out_dma, u8 *out_arg, int nbytes);
void des_dma_memory_copy(u32 *outcopy, u32 *out_dma, u8 *out_arg, int nbytes);
static int lq_deu_des_core (void *ctx_arg, u8 *out_arg, const u8 *in_arg,
u8 *iv_arg, u32 nbytes, int encdec, int mode);
struct des_ctx {
int controlr_M;
int key_length;
u8 iv[DES_BLOCK_SIZE];
u32 expkey[DES3_EDE_EXPKEY_WORDS];
};
static int disable_multiblock = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
module_param(disable_multiblock, int, 0);
#else
MODULE_PARM_DESC(disable_multiblock, "Disable encryption of whole multiblock buffers");
#endif
static int disable_deudma = 1;
struct des_container {
u8 *iv;
u8 *dst_buf;
u8 *src_buf;
int mode;
int encdec;
int complete;
int flag;
u32 bytes_processed;
u32 nbytes;
struct ablkcipher_request arequest;
};
des_priv_t *des_queue;
extern deu_drv_priv_t deu_dma_priv;
void hexdump1(unsigned char *buf, unsigned int len)
{
print_hex_dump(KERN_CONT, "", DUMP_PREFIX_OFFSET,
16, 1,
buf, len, false);
}
/*! \fn int lq_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key, unsigned int keylen)
* \ingroup IFX_DES_FUNCTIONS
* \brief sets DES key
* \param tfm linux crypto algo transform
* \param key input key
* \param keylen key length
*/
static int lq_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int keylen)
{
struct des_ctx *dctx = crypto_ablkcipher_ctx(tfm);
//printk("setkey in %s\n", __FILE__);
dctx->controlr_M = 0; // des
dctx->key_length = keylen;
memcpy ((u8 *) (dctx->expkey), key, keylen);
return 0;
}
/*! \fn int lq_des3_ede_setkey(struct crypto_ablkcipher *tfm, const u8 *key, unsigned int keylen)
* \ingroup IFX_DES_FUNCTIONS
* \brief sets DES key
* \param tfm linux crypto algo transform
* \param key input key
* \param keylen key length
*/
static int lq_des3_ede_setkey(struct crypto_ablkcipher *tfm, const u8 *in_key,
unsigned int keylen)
{
struct des_ctx *dctx = crypto_ablkcipher_ctx(tfm);
//printk("setkey in %s\n", __FILE__);
dctx->controlr_M = keylen/8 + 1; // des
dctx->key_length = keylen;
memcpy ((u8 *) (dctx->expkey), in_key, keylen);
return 0;
}
/*! \fn void ifx_deu_des_core(void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, u32 nbytes, int encdec, int mode)
* \ingroup IFX_DES_FUNCTIONS
* \brief main interface to DES hardware
* \param ctx_arg crypto algo context
* \param out_arg output bytestream
* \param in_arg input bytestream
* \param iv_arg initialization vector
* \param nbytes length of bytestream
* \param encdec 1 for encrypt; 0 for decrypt
* \param mode operation mode such as ebc, cbc
*/
static int lq_deu_des_core (void *ctx_arg, u8 *out_arg, const u8 *in_arg,
u8 *iv_arg, u32 nbytes, int encdec, int mode)
{
volatile struct des_t *des = (struct des_t *) DES_3DES_START;
struct des_ctx *dctx = ctx_arg;
u32 *key = dctx->expkey;
unsigned long flag;
int i = 0;
int nblocks = 0;
CRTCL_SECT_START;
des->controlr.M = dctx->controlr_M;
if (dctx->controlr_M == 0) // des
{
des->K1HR = DEU_ENDIAN_SWAP(*((u32 *) key + 0));
des->K1LR = DEU_ENDIAN_SWAP(*((u32 *) key + 1));
}
else {
/* Hardware Section */
switch (dctx->key_length) {
case 24:
des->K3HR = DEU_ENDIAN_SWAP(*((u32 *) key + 4));
des->K3LR = DEU_ENDIAN_SWAP(*((u32 *) key + 5));
/* no break; */
case 16:
des->K2HR = DEU_ENDIAN_SWAP(*((u32 *) key + 2));
des->K2LR = DEU_ENDIAN_SWAP(*((u32 *) key + 3));
/* no break; */
case 8:
des->K1HR = DEU_ENDIAN_SWAP(*((u32 *) key + 0));
des->K1LR = DEU_ENDIAN_SWAP(*((u32 *) key + 1));
break;
default:
CRTCL_SECT_END;
return -EINVAL;
}
}
des->controlr.E_D = !encdec; //encryption
des->controlr.O = mode; //0 ECB 1 CBC 2 OFB 3 CFB 4 CTR hexdump(prin,sizeof(*des));
if (mode > 0) {
des->IVHR = DEU_ENDIAN_SWAP(*(u32 *) iv_arg);
des->IVLR = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 1));
};
/* memory alignment issue */
dword_mem_aligned_in = (u32 *) DEU_DWORD_REORDERING(in_arg, des_buff_in, BUFFER_IN, nbytes);
deu_priv->deu_rx_buf = (u32 *) out_arg;
deu_priv->deu_rx_len = nbytes;
dma->controlr.ALGO = 0; //DES
des->controlr.DAU = 0;
dma->controlr.BS = 0;
dma->controlr.EN = 1;
while (des->controlr.BUS) {
};
wlen = dma_device_write (dma_device, (u8 *) dword_mem_aligned_in, nbytes, NULL);
if (wlen != nbytes) {
dma->controlr.EN = 0;
CRTCL_SECT_END;
printk (KERN_ERR "[%s %s %d]: dma_device_write fail!\n", __FILE__, __func__, __LINE__);
return -EINVAL;
}
/* Prepare Rx buf length used in dma psuedo interrupt */
outcopy = (u32 *) DEU_DWORD_REORDERING(out_arg, des_buff_out, BUFFER_OUT, nbytes);
deu_priv->outcopy = outcopy;
deu_priv->event_src = DES_ASYNC_EVENT;
if (mode > 0) {
*(u32 *) iv_arg = DEU_ENDIAN_SWAP(des->IVHR);
*((u32 *) iv_arg + 1) = DEU_ENDIAN_SWAP(des->IVLR);
};
CRTCL_SECT_END;
return -EINPROGRESS;
}
static int count_sgs(struct scatterlist *sl, unsigned int total_bytes)
{
int i = 0;
do {
total_bytes -= sl[i].length;
i++;
} while (total_bytes > 0);
return i;
}
/* \fn static inline struct des_container *des_container_cast (
* struct scatterlist *dst)
* \ingroup IFX_DES_FUNCTIONS
* \brief Locate the structure des_container in memory.
* \param *areq Pointer to memory location where ablkcipher_request is located
* \return *des_cointainer The function pointer to des_container
*/
static inline struct des_container *des_container_cast(
struct ablkcipher_request *areq)
{
return container_of(areq, struct des_container, arequest);
}
/* \fn static void lq_sg_complete(struct des_container *des_con)
* \ingroup IFX_DES_FUNCTIONS
* \brief Free the used up memory after encryt/decrypt.
*/
static void lq_sg_complete(struct des_container *des_con)
{
unsigned long queue_flag;
spin_lock_irqsave(&des_queue->lock, queue_flag);
kfree(des_con);
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
}
/* \fn void lq_sg_init(struct scatterlist *src,
* struct scatterlist *dst)
* \ingroup IFX_DES_FUNCTIONS
* \brief Maps the scatterlists into a source/destination page.
* \param *src Pointer to the source scatterlist
* \param *dst Pointer to the destination scatterlist
*/
static void lq_sg_init(struct des_container *des_con, struct scatterlist *src,
struct scatterlist *dst)
{
struct page *dst_page, *src_page;
src_page = sg_virt(src);
des_con->src_buf = (char *) src_page;
dst_page = sg_virt(dst);
des_con->dst_buf = (char *) dst_page;
}
/* \fn static int process_next_packet(struct des_container *des_con, struct ablkcipher_request *areq,
* int state)
* \ingroup IFX_DES_FUNCTIONS
* \brief Process the next packet after dequeuing the packet from crypto queue
* \param *des_con Pointer to DES container structure
* \param *areq Pointer to ablkcipher_request container
* \param state State of the packet (scattered packet or new packet to be processed)
* \return -EINVAL: DEU failure, -EINPROGRESS: DEU encrypt/decrypt in progress, 1: no scatterlist left
*/
static int process_next_packet(struct des_container *des_con, struct ablkcipher_request *areq,
int state)
{
u8 *iv;
int mode, encdec, err = -EINVAL;
u32 remain, inc, chunk_size, nbytes;
struct scatterlist *src = NULL;
struct scatterlist *dst = NULL;
struct crypto_ablkcipher *cipher;
struct des_ctx *ctx;
unsigned long queue_flag;
spin_lock_irqsave(&des_queue->lock, queue_flag);
mode = des_con->mode;
encdec = des_con->encdec;
iv = des_con->iv;
if (state & PROCESS_SCATTER) {
src = scatterwalk_sg_next(areq->src);
dst = scatterwalk_sg_next(areq->dst);
if (!src || !dst) {
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
return 1;
}
}
else if (state & PROCESS_NEW_PACKET) {
src = areq->src;
dst = areq->dst;
}
remain = des_con->bytes_processed;
chunk_size = src->length;
//printk("debug ln: %d, func: %s, reqsize: %d, scattersize: %d\n",
// __LINE__, __func__, areq->nbytes, chunk_size);
if (remain > DEU_MAX_PACKET_SIZE)
inc = DEU_MAX_PACKET_SIZE;
else if(remain > chunk_size)
inc = chunk_size;
else
inc = remain;
remain -= inc;
des_con->nbytes = inc;
if (state & PROCESS_SCATTER) {
des_con->src_buf += des_con->nbytes;
des_con->dst_buf += des_con->nbytes;
}
lq_sg_init(des_con, src, dst);
nbytes = des_con->nbytes;
cipher = crypto_ablkcipher_reqtfm(areq);
ctx = crypto_ablkcipher_ctx(cipher);
if (des_queue->hw_status == DES_IDLE) {
des_queue->hw_status = DES_STARTED;
}
des_con->bytes_processed -= des_con->nbytes;
err = ablkcipher_enqueue_request(&des_queue->list, &des_con->arequest);
if (err == -EBUSY) {
printk("Failed to enqueue request, ln: %d, err: %d\n",
__LINE__, err);
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
return -EINVAL;
}
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
err = lq_deu_des_core(ctx, des_con->dst_buf, des_con->src_buf, iv, nbytes, encdec, mode);
return err;
}
/* \fn static void process_queue(unsigned long data)
* \ingroup IFX_DES_FUNCTIONS
* \brief Process next packet in queue
* \param data not used
* \return
*/
static void process_queue(unsigned long data)
{
DEU_WAKEUP_EVENT(deu_dma_priv.deu_thread_wait, DES_ASYNC_EVENT,
deu_dma_priv.des_event_flags);
}
/* \fn static int des_crypto_thread (void *data)
* \ingroup IFX_DES_FUNCTIONS
* \brief DES thread that handles crypto requests from upper layer & DMA
* \param *data Not used
* \return -EINVAL: DEU failure, -EBUSY: DEU HW busy, 0: exit thread
*/
static int des_crypto_thread(void *data)
{
struct des_container *des_con = NULL;
struct ablkcipher_request *areq = NULL;
int err;
unsigned long queue_flag;
daemonize("lq_des_thread");
while (1)
{
DEU_WAIT_EVENT(deu_dma_priv.deu_thread_wait, DES_ASYNC_EVENT,
deu_dma_priv.des_event_flags);
spin_lock_irqsave(&des_queue->lock, queue_flag);
/* wait to prevent starting a crypto session before
* exiting the dma interrupt thread.
*/
if (des_queue->hw_status == DES_STARTED) {
areq = ablkcipher_dequeue_request(&des_queue->list);
des_con = des_container_cast(areq);
des_queue->hw_status = DES_BUSY;
}
else if (des_queue->hw_status == DES_IDLE) {
areq = ablkcipher_dequeue_request(&des_queue->list);
des_con = des_container_cast(areq);
des_queue->hw_status = DES_STARTED;
}
else if (des_queue->hw_status == DES_BUSY) {
areq = ablkcipher_dequeue_request(&des_queue->list);
des_con = des_container_cast(areq);
}
else if (des_queue->hw_status == DES_COMPLETED) {
areq->base.complete(&areq->base, 0);
lq_sg_complete(des_con);
des_queue->hw_status = DES_IDLE;
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
return 0;
}
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
if ((des_con->bytes_processed == 0)) {
goto des_done;
}
if (!des_con) {
goto des_done;
}
if (des_con->flag & PROCESS_NEW_PACKET) {
des_con->flag = PROCESS_SCATTER;
err = process_next_packet(des_con, areq, PROCESS_NEW_PACKET);
}
else
err = process_next_packet(des_con, areq, PROCESS_SCATTER);
if (err == -EINVAL) {
areq->base.complete(&areq->base, err);
lq_sg_complete(des_con);
printk("src/dst returned -EINVAL in func: %s\n", __func__);
}
else if (err > 0) {
printk("src/dst returned zero in func: %s\n", __func__);
goto des_done;
}
continue;
des_done:
//printk("debug line - %d, func: %s, qlen: %d\n", __LINE__, __func__, des_queue->list.qlen);
areq->base.complete(&areq->base, 0);
lq_sg_complete(des_con);
spin_lock_irqsave(&des_queue->lock, queue_flag);
if (des_queue->list.qlen > 0) {
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
tasklet_schedule(&des_queue->des_task);
}
else {
des_queue->hw_status = DES_IDLE;
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
}
} // while(1)
return 0;
}
/* \fn static int lq_des_queue_mgr(struct des_ctx *ctx, struct ablkcipher_request *areq,
u8 *iv, int encdec, int mode)
* \ingroup IFX_DES_FUNCTIONS
* \brief starts the process of queuing DEU requests
* \param *ctx crypto algo contax
* \param *areq Pointer to the balkcipher requests
* \param *iv Pointer to intput vector location
* \param dir Encrypt/Decrypt
* \mode The mode DES algo is running
* \return 0 if success
*/
static int lq_queue_mgr(struct des_ctx *ctx, struct ablkcipher_request *areq,
u8 *iv, int encdec, int mode)
{
int err = -EINVAL;
unsigned long queue_flag;
struct scatterlist *src = areq->src;
struct scatterlist *dst = areq->dst;
struct des_container *des_con = NULL;
u32 remain, inc, nbytes = areq->nbytes;
u32 chunk_bytes = src->length;
des_con = (struct des_container *)kmalloc(sizeof(struct des_container),
GFP_KERNEL);
if (!(des_con)) {
printk("Cannot allocate memory for AES container, fn %s, ln %d\n",
__func__, __LINE__);
return -ENOMEM;
}
/* DES encrypt/decrypt mode */
if (mode == 5) {
nbytes = DES_BLOCK_SIZE;
chunk_bytes = DES_BLOCK_SIZE;
mode = 0;
}
des_con->bytes_processed = nbytes;
des_con->arequest = (*areq);
remain = nbytes;
//printk("debug - Line: %d, func: %s, reqsize: %d, scattersize: %d\n",
// __LINE__, __func__, nbytes, chunk_bytes);
if (remain > DEU_MAX_PACKET_SIZE)
inc = DEU_MAX_PACKET_SIZE;
else if(remain > chunk_bytes)
inc = chunk_bytes;
else
inc = remain;
remain -= inc;
lq_sg_init(des_con, src, dst);
if (remain <= 0 ) {
des_con->complete = 1;
}
else
des_con->complete = 0;
des_con->nbytes = inc;
des_con->iv = iv;
des_con->mode = mode;
des_con->encdec = encdec;
spin_lock_irqsave(&des_queue->lock, queue_flag);
if (des_queue->hw_status == DES_STARTED || des_queue->hw_status == DES_BUSY ||
des_queue->list.qlen > 0) {
des_con->flag = PROCESS_NEW_PACKET;
err = ablkcipher_enqueue_request(&des_queue->list, &des_con->arequest);
if (err == -EBUSY) {
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
printk("Fail to enqueue ablkcipher request ln: %d, err: %d\n",
__LINE__, err);
return err;
}
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
return -EINPROGRESS;
}
else if (des_queue->hw_status == DES_IDLE) {
des_queue->hw_status = DES_STARTED;
}
des_con->flag = PROCESS_SCATTER;
des_con->bytes_processed -= des_con->nbytes;
err = ablkcipher_enqueue_request(&des_queue->list, &des_con->arequest);
if (err == -EBUSY) {
printk("Fail to enqueue ablkcipher request ln: %d, err: %d\n",
__LINE__, err);
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
return err;
}
spin_unlock_irqrestore(&des_queue->lock, queue_flag);
return lq_deu_des_core(ctx, des_con->dst_buf, des_con->src_buf, iv, inc, encdec, mode);
}
/* \fn static int lq_des_encrypt(struct ablkcipher_request *areq)
* \ingroup IFX_DES_FUNCTIONS
* \brief Decrypt function for DES algo
* \param *areq Pointer to ablkcipher request in memory
* \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure
*/
static int lq_des_encrypt(struct ablkcipher_request *areq)
{
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher);
return lq_queue_mgr(ctx, areq, NULL, CRYPTO_DIR_ENCRYPT, 5);
}
/* \fn static int lq_des_decrypt(struct ablkcipher_request *areq)
* \ingroup IFX_DES_FUNCTIONS
* \brief Decrypt function for DES algo
* \param *areq Pointer to ablkcipher request in memory
* \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure
*/
static int lq_des_decrypt(struct ablkcipher_request *areq)
{
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher);
return lq_queue_mgr(ctx, areq, NULL, CRYPTO_DIR_DECRYPT, 5);
}
/* \fn static int lq_ecb_des_encrypt(struct ablkcipher_request *areq)
* \ingroup IFX_DES_FUNCTIONS
* \brief Decrypt function for DES algo
* \param *areq Pointer to ablkcipher request in memory
* \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure
*/
static int lq_ecb_des_encrypt(struct ablkcipher_request *areq)
{
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher);
return lq_queue_mgr(ctx, areq, areq->info, CRYPTO_DIR_ENCRYPT, 0);
}
/* \fn static int lq_ecb_des_decrypt(struct ablkcipher_request *areq)
* \ingroup IFX_DES_FUNCTIONS
* \brief Decrypt function for DES algo
* \param *areq Pointer to ablkcipher request in memory
* \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure
*/
static int lq_ecb_des_decrypt(struct ablkcipher_request *areq)
{
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher);
return lq_queue_mgr(ctx, areq, areq->info, CRYPTO_DIR_DECRYPT, 0);
}
/* \fn static int lq_cbc_ecb_des_encrypt(struct ablkcipher_request *areq)
* \ingroup IFX_DES_FUNCTIONS
* \brief Decrypt function for DES algo
* \param *areq Pointer to ablkcipher request in memory
* \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure
*/
static int lq_cbc_des_encrypt(struct ablkcipher_request *areq)
{
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher);
return lq_queue_mgr(ctx, areq, areq->info, CRYPTO_DIR_ENCRYPT, 1);
}
/* \fn static int lq_cbc_des_decrypt(struct ablkcipher_request *areq)
* \ingroup IFX_DES_FUNCTIONS
* \brief Decrypt function for DES algo
* \param *areq Pointer to ablkcipher request in memory
* \return 0 is success, -EINPROGRESS if encryting, EINVAL if failure
*/
static int lq_cbc_des_decrypt(struct ablkcipher_request *areq)
{
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
struct des_ctx *ctx = crypto_ablkcipher_ctx(cipher);
return lq_queue_mgr(ctx, areq, areq->info, CRYPTO_DIR_DECRYPT, 1);
}
struct lq_des_alg {
struct crypto_alg alg;
};
/* DES Supported algo array */
static struct lq_des_alg des_drivers_alg [] = {
{
.alg = {
.cra_name = "des",
.cra_driver_name = "lqdeu-des",
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct des_ctx),
.cra_type = &crypto_ablkcipher_type,
.cra_priority = 300,
.cra_module = THIS_MODULE,
.cra_ablkcipher = {
.setkey = lq_des_setkey,
.encrypt = lq_des_encrypt,
.decrypt = lq_des_decrypt,
.geniv = "eseqiv",
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
}
}
},{
.alg = {
.cra_name = "ecb(des)",
.cra_driver_name = "lqdeu-ecb(des)",
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct des_ctx),
.cra_type = &crypto_ablkcipher_type,
.cra_priority = 400,
.cra_module = THIS_MODULE,
.cra_ablkcipher = {
.setkey = lq_des_setkey,
.encrypt = lq_ecb_des_encrypt,
.decrypt = lq_ecb_des_decrypt,
.geniv = "eseqiv",
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
}
}
},{
.alg = {
.cra_name = "cbc(des)",
.cra_driver_name = "lqdeu-cbc(des)",
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct des_ctx),
.cra_type = &crypto_ablkcipher_type,
.cra_priority = 400,
.cra_module = THIS_MODULE,
.cra_ablkcipher = {
.setkey = lq_des_setkey,
.encrypt = lq_cbc_des_encrypt,
.decrypt = lq_cbc_des_decrypt,
.geniv = "eseqiv",
.min_keysize = DES3_EDE_KEY_SIZE,
.max_keysize = DES3_EDE_KEY_SIZE,
.ivsize = DES3_EDE_BLOCK_SIZE,
}
}
},{
.alg = {
.cra_name = "des3_ede",
.cra_driver_name = "lqdeu-des3_ede",
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct des_ctx),
.cra_type = &crypto_ablkcipher_type,
.cra_priority = 300,
.cra_module = THIS_MODULE,
.cra_ablkcipher = {
.setkey = lq_des3_ede_setkey,
.encrypt = lq_des_encrypt,
.decrypt = lq_des_decrypt,
.geniv = "eseqiv",
.min_keysize = DES_KEY_SIZE,
.max_keysize = DES_KEY_SIZE,
.ivsize = DES_BLOCK_SIZE,
}
}
},{
.alg = {
.cra_name = "ecb(des3_ede)",
.cra_driver_name = "lqdeu-ecb(des3_ede)",
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct des_ctx),
.cra_type = &crypto_ablkcipher_type,
.cra_priority = 400,
.cra_module = THIS_MODULE,
.cra_ablkcipher = {
.setkey = lq_des3_ede_setkey,
.encrypt = lq_ecb_des_encrypt,
.decrypt = lq_ecb_des_decrypt,
.geniv = "eseqiv",
.min_keysize = DES3_EDE_KEY_SIZE,
.max_keysize = DES3_EDE_KEY_SIZE,
.ivsize = DES3_EDE_BLOCK_SIZE,
}
}
},{
.alg = {
.cra_name = "cbc(des3_ede)",
.cra_driver_name = "lqdeu-cbc(des3_ede)",
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
.cra_blocksize = DES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct des_ctx),
.cra_type = &crypto_ablkcipher_type,
.cra_priority = 400,
.cra_module = THIS_MODULE,
.cra_ablkcipher = {
.setkey = lq_des3_ede_setkey,
.encrypt = lq_cbc_des_encrypt,
.decrypt = lq_cbc_des_decrypt,
.geniv = "eseqiv",
.min_keysize = DES3_EDE_KEY_SIZE,
.max_keysize = DES3_EDE_KEY_SIZE,
.ivsize = DES3_EDE_BLOCK_SIZE,
}
}
}
};
/*! \fn int __init lqdeu_async_des_init (void)
* \ingroup IFX_DES_FUNCTIONS
* \brief initialize des driver
*/
int __init lqdeu_async_des_init (void)
{
int i, j, ret = -EINVAL;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
if (!disable_multiblock) {
ifxdeu_des_alg.cra_u.cipher.cia_max_nbytes = DES_BLOCK_SIZE; //(size_t)-1;
ifxdeu_des_alg.cra_u.cipher.cia_req_align = 16;
ifxdeu_des_alg.cra_u.cipher.cia_ecb = ifx_deu_des_ecb;
ifxdeu_des_alg.cra_u.cipher.cia_cbc = ifx_deu_des_cbc;
ifxdeu_des_alg.cra_u.cipher.cia_cfb = ifx_deu_des_cfb;
ifxdeu_des_alg.cra_u.cipher.cia_ofb = ifx_deu_des_ofb;
}
#endif
for (i = 0; i < ARRAY_SIZE(des_drivers_alg); i++) {
ret = crypto_register_alg(&des_drivers_alg[i].alg);
//printk("driver: %s\n", des_drivers_alg[i].alg.cra_name);
if (ret)
goto des_err;
}
des_chip_init();
CRTCL_SECT_INIT;
printk (KERN_NOTICE "IFX DEU DES initialized%s%s.\n", disable_multiblock ? "" : " (multiblock)", disable_deudma ? "" : " (DMA)");
return ret;
des_err:
for (j = 0; j < i; j++)
crypto_unregister_alg(&des_drivers_alg[i].alg);
printk(KERN_ERR "Lantiq %s driver initialization failed!\n", (char *)&des_drivers_alg[i].alg.cra_driver_name);
return ret;
cbc_des3_ede_err:
for (i = 0; i < ARRAY_SIZE(des_drivers_alg); i++) {
if (!strcmp((char *)&des_drivers_alg[i].alg.cra_name, "cbc(des3_ede)"))
crypto_unregister_alg(&des_drivers_alg[i].alg);
}
printk(KERN_ERR "Lantiq %s driver initialization failed!\n", (char *)&des_drivers_alg[i].alg.cra_driver_name);
return ret;
}
/*! \fn void __exit lqdeu_fini_async_des (void)
* \ingroup IFX_DES_FUNCTIONS
* \brief unregister des driver
*/
void __exit lqdeu_fini_async_des (void)
{
int i;
for (i = 0; i < ARRAY_SIZE(des_drivers_alg); i++)
crypto_unregister_alg(&des_drivers_alg[i].alg);
des_queue->hw_status = DES_COMPLETED;
DEU_WAKEUP_EVENT(deu_dma_priv.deu_thread_wait, DES_ASYNC_EVENT,
deu_dma_priv.des_event_flags);
kfree(des_queue);
}