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Diffstat (limited to 'package/kernel/lantiq/ltq-deu/src/ifxmips_async_des.c')
| -rw-r--r-- | package/kernel/lantiq/ltq-deu/src/ifxmips_async_des.c | 954 |
1 files changed, 954 insertions, 0 deletions
diff --git a/package/kernel/lantiq/ltq-deu/src/ifxmips_async_des.c b/package/kernel/lantiq/ltq-deu/src/ifxmips_async_des.c new file mode 100644 index 0000000..9c593ae --- /dev/null +++ b/package/kernel/lantiq/ltq-deu/src/ifxmips_async_des.c @@ -0,0 +1,954 @@ +/****************************************************************************** +** +** 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 = 300, + .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 = 300, + .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 = 300, + .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 = 300, + .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); +} + |