]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
crypto: ixp4xx - Hardware crypto support for IXP4xx CPUs
authorChristian Hohnstaedt <chohnstaedt@innominate.com>
Wed, 25 Jun 2008 06:38:47 +0000 (14:38 +0800)
committerHerbert Xu <herbert@gondor.apana.org.au>
Thu, 10 Jul 2008 12:35:16 +0000 (20:35 +0800)
Add support for the hardware crypto engine provided by the NPE C
of the Intel IXP4xx networking processor series.

Supported ciphers: des, des3, aes
and a combination of them with md5 and sha1 hmac

Signed-off-by: Christian Hohnstaedt <chohnstaedt@innominate.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
drivers/crypto/Kconfig
drivers/crypto/Makefile
drivers/crypto/ixp4xx_crypto.c [new file with mode: 0644]

index 249c1358058eeb76cbebc303ba265b1125452fd6..eb2ec2e0a1458d6f87abb80b4a31820e28c27e64 100644 (file)
@@ -190,4 +190,13 @@ config CRYPTO_DEV_TALITOS
          To compile this driver as a module, choose M here: the module
          will be called talitos.
 
+config CRYPTO_DEV_IXP4XX
+       tristate "Driver for IXP4xx crypto hardware acceleration"
+       depends on ARCH_IXP4XX
+       select CRYPTO_DES
+       select CRYPTO_ALGAPI
+       select CRYPTO_BLKCIPHER
+       help
+         Driver for the IXP4xx NPE crypto engine.
+
 endif # CRYPTO_HW
index d29d2cd0e65898ead8d09cdc20948315492796e7..73557b2968d33710ae4c0a5745d6ac4bce0dedef 100644 (file)
@@ -3,3 +3,4 @@ obj-$(CONFIG_CRYPTO_DEV_PADLOCK_SHA) += padlock-sha.o
 obj-$(CONFIG_CRYPTO_DEV_GEODE) += geode-aes.o
 obj-$(CONFIG_CRYPTO_DEV_HIFN_795X) += hifn_795x.o
 obj-$(CONFIG_CRYPTO_DEV_TALITOS) += talitos.o
+obj-$(CONFIG_CRYPTO_DEV_IXP4XX) += ixp4xx_crypto.o
diff --git a/drivers/crypto/ixp4xx_crypto.c b/drivers/crypto/ixp4xx_crypto.c
new file mode 100644 (file)
index 0000000..42a107f
--- /dev/null
@@ -0,0 +1,1506 @@
+/*
+ * Intel IXP4xx NPE-C crypto driver
+ *
+ * Copyright (C) 2008 Christian Hohnstaedt <chohnstaedt@innominate.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/crypto.h>
+#include <linux/kernel.h>
+#include <linux/rtnetlink.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+
+#include <crypto/ctr.h>
+#include <crypto/des.h>
+#include <crypto/aes.h>
+#include <crypto/sha.h>
+#include <crypto/algapi.h>
+#include <crypto/aead.h>
+#include <crypto/authenc.h>
+#include <crypto/scatterwalk.h>
+
+#include <asm/arch/npe.h>
+#include <asm/arch/qmgr.h>
+
+#define MAX_KEYLEN 32
+
+/* hash: cfgword + 2 * digestlen; crypt: keylen + cfgword */
+#define NPE_CTX_LEN 80
+#define AES_BLOCK128 16
+
+#define NPE_OP_HASH_VERIFY   0x01
+#define NPE_OP_CCM_ENABLE    0x04
+#define NPE_OP_CRYPT_ENABLE  0x08
+#define NPE_OP_HASH_ENABLE   0x10
+#define NPE_OP_NOT_IN_PLACE  0x20
+#define NPE_OP_HMAC_DISABLE  0x40
+#define NPE_OP_CRYPT_ENCRYPT 0x80
+
+#define NPE_OP_CCM_GEN_MIC   0xcc
+#define NPE_OP_HASH_GEN_ICV  0x50
+#define NPE_OP_ENC_GEN_KEY   0xc9
+
+#define MOD_ECB     0x0000
+#define MOD_CTR     0x1000
+#define MOD_CBC_ENC 0x2000
+#define MOD_CBC_DEC 0x3000
+#define MOD_CCM_ENC 0x4000
+#define MOD_CCM_DEC 0x5000
+
+#define KEYLEN_128  4
+#define KEYLEN_192  6
+#define KEYLEN_256  8
+
+#define CIPH_DECR   0x0000
+#define CIPH_ENCR   0x0400
+
+#define MOD_DES     0x0000
+#define MOD_TDEA2   0x0100
+#define MOD_3DES   0x0200
+#define MOD_AES     0x0800
+#define MOD_AES128  (0x0800 | KEYLEN_128)
+#define MOD_AES192  (0x0900 | KEYLEN_192)
+#define MOD_AES256  (0x0a00 | KEYLEN_256)
+
+#define MAX_IVLEN   16
+#define NPE_ID      2  /* NPE C */
+#define NPE_QLEN    16
+/* Space for registering when the first
+ * NPE_QLEN crypt_ctl are busy */
+#define NPE_QLEN_TOTAL 64
+
+#define SEND_QID    29
+#define RECV_QID    30
+
+#define CTL_FLAG_UNUSED                0x0000
+#define CTL_FLAG_USED          0x1000
+#define CTL_FLAG_PERFORM_ABLK  0x0001
+#define CTL_FLAG_GEN_ICV       0x0002
+#define CTL_FLAG_GEN_REVAES    0x0004
+#define CTL_FLAG_PERFORM_AEAD  0x0008
+#define CTL_FLAG_MASK          0x000f
+
+#define HMAC_IPAD_VALUE   0x36
+#define HMAC_OPAD_VALUE   0x5C
+#define HMAC_PAD_BLOCKLEN SHA1_BLOCK_SIZE
+
+#define MD5_DIGEST_SIZE   16
+
+struct buffer_desc {
+       u32 phys_next;
+       u16 buf_len;
+       u16 pkt_len;
+       u32 phys_addr;
+       u32 __reserved[4];
+       struct buffer_desc *next;
+};
+
+struct crypt_ctl {
+       u8 mode;                /* NPE_OP_*  operation mode */
+       u8 init_len;
+       u16 reserved;
+       u8 iv[MAX_IVLEN];       /* IV for CBC mode or CTR IV for CTR mode */
+       u32 icv_rev_aes;        /* icv or rev aes */
+       u32 src_buf;
+       u32 dst_buf;
+       u16 auth_offs;          /* Authentication start offset */
+       u16 auth_len;           /* Authentication data length */
+       u16 crypt_offs;         /* Cryption start offset */
+       u16 crypt_len;          /* Cryption data length */
+       u32 aadAddr;            /* Additional Auth Data Addr for CCM mode */
+       u32 crypto_ctx;         /* NPE Crypto Param structure address */
+
+       /* Used by Host: 4*4 bytes*/
+       unsigned ctl_flags;
+       union {
+               struct ablkcipher_request *ablk_req;
+               struct aead_request *aead_req;
+               struct crypto_tfm *tfm;
+       } data;
+       struct buffer_desc *regist_buf;
+       u8 *regist_ptr;
+};
+
+struct ablk_ctx {
+       struct buffer_desc *src;
+       struct buffer_desc *dst;
+       unsigned src_nents;
+       unsigned dst_nents;
+};
+
+struct aead_ctx {
+       struct buffer_desc *buffer;
+       unsigned short assoc_nents;
+       unsigned short src_nents;
+       struct scatterlist ivlist;
+       /* used when the hmac is not on one sg entry */
+       u8 *hmac_virt;
+       int encrypt;
+};
+
+struct ix_hash_algo {
+       u32 cfgword;
+       unsigned char *icv;
+};
+
+struct ix_sa_dir {
+       unsigned char *npe_ctx;
+       dma_addr_t npe_ctx_phys;
+       int npe_ctx_idx;
+       u8 npe_mode;
+};
+
+struct ixp_ctx {
+       struct ix_sa_dir encrypt;
+       struct ix_sa_dir decrypt;
+       int authkey_len;
+       u8 authkey[MAX_KEYLEN];
+       int enckey_len;
+       u8 enckey[MAX_KEYLEN];
+       u8 salt[MAX_IVLEN];
+       u8 nonce[CTR_RFC3686_NONCE_SIZE];
+       unsigned salted;
+       atomic_t configuring;
+       struct completion completion;
+};
+
+struct ixp_alg {
+       struct crypto_alg crypto;
+       const struct ix_hash_algo *hash;
+       u32 cfg_enc;
+       u32 cfg_dec;
+
+       int registered;
+};
+
+static const struct ix_hash_algo hash_alg_md5 = {
+       .cfgword        = 0xAA010004,
+       .icv            = "\x01\x23\x45\x67\x89\xAB\xCD\xEF"
+                         "\xFE\xDC\xBA\x98\x76\x54\x32\x10",
+};
+static const struct ix_hash_algo hash_alg_sha1 = {
+       .cfgword        = 0x00000005,
+       .icv            = "\x67\x45\x23\x01\xEF\xCD\xAB\x89\x98\xBA"
+                         "\xDC\xFE\x10\x32\x54\x76\xC3\xD2\xE1\xF0",
+};
+
+static struct npe *npe_c;
+static struct dma_pool *buffer_pool = NULL;
+static struct dma_pool *ctx_pool = NULL;
+
+static struct crypt_ctl *crypt_virt = NULL;
+static dma_addr_t crypt_phys;
+
+static int support_aes = 1;
+
+static void dev_release(struct device *dev)
+{
+       return;
+}
+
+#define DRIVER_NAME "ixp4xx_crypto"
+static struct platform_device pseudo_dev = {
+       .name = DRIVER_NAME,
+       .id   = 0,
+       .num_resources = 0,
+       .dev  = {
+               .coherent_dma_mask = DMA_32BIT_MASK,
+               .release = dev_release,
+       }
+};
+
+static struct device *dev = &pseudo_dev.dev;
+
+static inline dma_addr_t crypt_virt2phys(struct crypt_ctl *virt)
+{
+       return crypt_phys + (virt - crypt_virt) * sizeof(struct crypt_ctl);
+}
+
+static inline struct crypt_ctl *crypt_phys2virt(dma_addr_t phys)
+{
+       return crypt_virt + (phys - crypt_phys) / sizeof(struct crypt_ctl);
+}
+
+static inline u32 cipher_cfg_enc(struct crypto_tfm *tfm)
+{
+       return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_enc;
+}
+
+static inline u32 cipher_cfg_dec(struct crypto_tfm *tfm)
+{
+       return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_dec;
+}
+
+static inline const struct ix_hash_algo *ix_hash(struct crypto_tfm *tfm)
+{
+       return container_of(tfm->__crt_alg, struct ixp_alg, crypto)->hash;
+}
+
+static int setup_crypt_desc(void)
+{
+       BUILD_BUG_ON(sizeof(struct crypt_ctl) != 64);
+       crypt_virt = dma_alloc_coherent(dev,
+                       NPE_QLEN * sizeof(struct crypt_ctl),
+                       &crypt_phys, GFP_KERNEL);
+       if (!crypt_virt)
+               return -ENOMEM;
+       memset(crypt_virt, 0, NPE_QLEN * sizeof(struct crypt_ctl));
+       return 0;
+}
+
+static spinlock_t desc_lock;
+static struct crypt_ctl *get_crypt_desc(void)
+{
+       int i;
+       static int idx = 0;
+       unsigned long flags;
+
+       spin_lock_irqsave(&desc_lock, flags);
+
+       if (unlikely(!crypt_virt))
+               setup_crypt_desc();
+       if (unlikely(!crypt_virt)) {
+               spin_unlock_irqrestore(&desc_lock, flags);
+               return NULL;
+       }
+       i = idx;
+       if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
+               if (++idx >= NPE_QLEN)
+                       idx = 0;
+               crypt_virt[i].ctl_flags = CTL_FLAG_USED;
+               spin_unlock_irqrestore(&desc_lock, flags);
+               return crypt_virt +i;
+       } else {
+               spin_unlock_irqrestore(&desc_lock, flags);
+               return NULL;
+       }
+}
+
+static spinlock_t emerg_lock;
+static struct crypt_ctl *get_crypt_desc_emerg(void)
+{
+       int i;
+       static int idx = NPE_QLEN;
+       struct crypt_ctl *desc;
+       unsigned long flags;
+
+       desc = get_crypt_desc();
+       if (desc)
+               return desc;
+       if (unlikely(!crypt_virt))
+               return NULL;
+
+       spin_lock_irqsave(&emerg_lock, flags);
+       i = idx;
+       if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) {
+               if (++idx >= NPE_QLEN_TOTAL)
+                       idx = NPE_QLEN;
+               crypt_virt[i].ctl_flags = CTL_FLAG_USED;
+               spin_unlock_irqrestore(&emerg_lock, flags);
+               return crypt_virt +i;
+       } else {
+               spin_unlock_irqrestore(&emerg_lock, flags);
+               return NULL;
+       }
+}
+
+static void free_buf_chain(struct buffer_desc *buf, u32 phys)
+{
+       while (buf) {
+               struct buffer_desc *buf1;
+               u32 phys1;
+
+               buf1 = buf->next;
+               phys1 = buf->phys_next;
+               dma_pool_free(buffer_pool, buf, phys);
+               buf = buf1;
+               phys = phys1;
+       }
+}
+
+static struct tasklet_struct crypto_done_tasklet;
+
+static void finish_scattered_hmac(struct crypt_ctl *crypt)
+{
+       struct aead_request *req = crypt->data.aead_req;
+       struct aead_ctx *req_ctx = aead_request_ctx(req);
+       struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+       int authsize = crypto_aead_authsize(tfm);
+       int decryptlen = req->cryptlen - authsize;
+
+       if (req_ctx->encrypt) {
+               scatterwalk_map_and_copy(req_ctx->hmac_virt,
+                       req->src, decryptlen, authsize, 1);
+       }
+       dma_pool_free(buffer_pool, req_ctx->hmac_virt, crypt->icv_rev_aes);
+}
+
+static void one_packet(dma_addr_t phys)
+{
+       struct crypt_ctl *crypt;
+       struct ixp_ctx *ctx;
+       int failed;
+       enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
+
+       failed = phys & 0x1 ? -EBADMSG : 0;
+       phys &= ~0x3;
+       crypt = crypt_phys2virt(phys);
+
+       switch (crypt->ctl_flags & CTL_FLAG_MASK) {
+       case CTL_FLAG_PERFORM_AEAD: {
+               struct aead_request *req = crypt->data.aead_req;
+               struct aead_ctx *req_ctx = aead_request_ctx(req);
+               dma_unmap_sg(dev, req->assoc, req_ctx->assoc_nents,
+                               DMA_TO_DEVICE);
+               dma_unmap_sg(dev, &req_ctx->ivlist, 1, DMA_BIDIRECTIONAL);
+               dma_unmap_sg(dev, req->src, req_ctx->src_nents,
+                               DMA_BIDIRECTIONAL);
+
+               free_buf_chain(req_ctx->buffer, crypt->src_buf);
+               if (req_ctx->hmac_virt) {
+                       finish_scattered_hmac(crypt);
+               }
+               req->base.complete(&req->base, failed);
+               break;
+       }
+       case CTL_FLAG_PERFORM_ABLK: {
+               struct ablkcipher_request *req = crypt->data.ablk_req;
+               struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req);
+               int nents;
+               if (req_ctx->dst) {
+                       nents = req_ctx->dst_nents;
+                       dma_unmap_sg(dev, req->dst, nents, DMA_FROM_DEVICE);
+                       free_buf_chain(req_ctx->dst, crypt->dst_buf);
+                       src_direction = DMA_TO_DEVICE;
+               }
+               nents = req_ctx->src_nents;
+               dma_unmap_sg(dev, req->src, nents, src_direction);
+               free_buf_chain(req_ctx->src, crypt->src_buf);
+               req->base.complete(&req->base, failed);
+               break;
+       }
+       case CTL_FLAG_GEN_ICV:
+               ctx = crypto_tfm_ctx(crypt->data.tfm);
+               dma_pool_free(ctx_pool, crypt->regist_ptr,
+                               crypt->regist_buf->phys_addr);
+               dma_pool_free(buffer_pool, crypt->regist_buf, crypt->src_buf);
+               if (atomic_dec_and_test(&ctx->configuring))
+                       complete(&ctx->completion);
+               break;
+       case CTL_FLAG_GEN_REVAES:
+               ctx = crypto_tfm_ctx(crypt->data.tfm);
+               *(u32*)ctx->decrypt.npe_ctx &= cpu_to_be32(~CIPH_ENCR);
+               if (atomic_dec_and_test(&ctx->configuring))
+                       complete(&ctx->completion);
+               break;
+       default:
+               BUG();
+       }
+       crypt->ctl_flags = CTL_FLAG_UNUSED;
+}
+
+static void irqhandler(void *_unused)
+{
+       tasklet_schedule(&crypto_done_tasklet);
+}
+
+static void crypto_done_action(unsigned long arg)
+{
+       int i;
+
+       for(i=0; i<4; i++) {
+               dma_addr_t phys = qmgr_get_entry(RECV_QID);
+               if (!phys)
+                       return;
+               one_packet(phys);
+       }
+       tasklet_schedule(&crypto_done_tasklet);
+}
+
+static int init_ixp_crypto(void)
+{
+       int ret = -ENODEV;
+
+       if (! ( ~(*IXP4XX_EXP_CFG2) & (IXP4XX_FEATURE_HASH |
+                               IXP4XX_FEATURE_AES | IXP4XX_FEATURE_DES))) {
+               printk(KERN_ERR "ixp_crypto: No HW crypto available\n");
+               return ret;
+       }
+       npe_c = npe_request(NPE_ID);
+       if (!npe_c)
+               return ret;
+
+       if (!npe_running(npe_c)) {
+               npe_load_firmware(npe_c, npe_name(npe_c), dev);
+       }
+
+       /* buffer_pool will also be used to sometimes store the hmac,
+        * so assure it is large enough
+        */
+       BUILD_BUG_ON(SHA1_DIGEST_SIZE > sizeof(struct buffer_desc));
+       buffer_pool = dma_pool_create("buffer", dev,
+                       sizeof(struct buffer_desc), 32, 0);
+       ret = -ENOMEM;
+       if (!buffer_pool) {
+               goto err;
+       }
+       ctx_pool = dma_pool_create("context", dev,
+                       NPE_CTX_LEN, 16, 0);
+       if (!ctx_pool) {
+               goto err;
+       }
+       ret = qmgr_request_queue(SEND_QID, NPE_QLEN_TOTAL, 0, 0);
+       if (ret)
+               goto err;
+       ret = qmgr_request_queue(RECV_QID, NPE_QLEN, 0, 0);
+       if (ret) {
+               qmgr_release_queue(SEND_QID);
+               goto err;
+       }
+       qmgr_set_irq(RECV_QID, QUEUE_IRQ_SRC_NOT_EMPTY, irqhandler, NULL);
+       tasklet_init(&crypto_done_tasklet, crypto_done_action, 0);
+
+       qmgr_enable_irq(RECV_QID);
+       return 0;
+err:
+       if (ctx_pool)
+               dma_pool_destroy(ctx_pool);
+       if (buffer_pool)
+               dma_pool_destroy(buffer_pool);
+       npe_release(npe_c);
+       return ret;
+}
+
+static void release_ixp_crypto(void)
+{
+       qmgr_disable_irq(RECV_QID);
+       tasklet_kill(&crypto_done_tasklet);
+
+       qmgr_release_queue(SEND_QID);
+       qmgr_release_queue(RECV_QID);
+
+       dma_pool_destroy(ctx_pool);
+       dma_pool_destroy(buffer_pool);
+
+       npe_release(npe_c);
+
+       if (crypt_virt) {
+               dma_free_coherent(dev,
+                       NPE_QLEN_TOTAL * sizeof( struct crypt_ctl),
+                       crypt_virt, crypt_phys);
+       }
+       return;
+}
+
+static void reset_sa_dir(struct ix_sa_dir *dir)
+{
+       memset(dir->npe_ctx, 0, NPE_CTX_LEN);
+       dir->npe_ctx_idx = 0;
+       dir->npe_mode = 0;
+}
+
+static int init_sa_dir(struct ix_sa_dir *dir)
+{
+       dir->npe_ctx = dma_pool_alloc(ctx_pool, GFP_KERNEL, &dir->npe_ctx_phys);
+       if (!dir->npe_ctx) {
+               return -ENOMEM;
+       }
+       reset_sa_dir(dir);
+       return 0;
+}
+
+static void free_sa_dir(struct ix_sa_dir *dir)
+{
+       memset(dir->npe_ctx, 0, NPE_CTX_LEN);
+       dma_pool_free(ctx_pool, dir->npe_ctx, dir->npe_ctx_phys);
+}
+
+static int init_tfm(struct crypto_tfm *tfm)
+{
+       struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
+       int ret;
+
+       atomic_set(&ctx->configuring, 0);
+       ret = init_sa_dir(&ctx->encrypt);
+       if (ret)
+               return ret;
+       ret = init_sa_dir(&ctx->decrypt);
+       if (ret) {
+               free_sa_dir(&ctx->encrypt);
+       }
+       return ret;
+}
+
+static int init_tfm_ablk(struct crypto_tfm *tfm)
+{
+       tfm->crt_ablkcipher.reqsize = sizeof(struct ablk_ctx);
+       return init_tfm(tfm);
+}
+
+static int init_tfm_aead(struct crypto_tfm *tfm)
+{
+       tfm->crt_aead.reqsize = sizeof(struct aead_ctx);
+       return init_tfm(tfm);
+}
+
+static void exit_tfm(struct crypto_tfm *tfm)
+{
+       struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
+       free_sa_dir(&ctx->encrypt);
+       free_sa_dir(&ctx->decrypt);
+}
+
+static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target,
+               int init_len, u32 ctx_addr, const u8 *key, int key_len)
+{
+       struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
+       struct crypt_ctl *crypt;
+       struct buffer_desc *buf;
+       int i;
+       u8 *pad;
+       u32 pad_phys, buf_phys;
+
+       BUILD_BUG_ON(NPE_CTX_LEN < HMAC_PAD_BLOCKLEN);
+       pad = dma_pool_alloc(ctx_pool, GFP_KERNEL, &pad_phys);
+       if (!pad)
+               return -ENOMEM;
+       buf = dma_pool_alloc(buffer_pool, GFP_KERNEL, &buf_phys);
+       if (!buf) {
+               dma_pool_free(ctx_pool, pad, pad_phys);
+               return -ENOMEM;
+       }
+       crypt = get_crypt_desc_emerg();
+       if (!crypt) {
+               dma_pool_free(ctx_pool, pad, pad_phys);
+               dma_pool_free(buffer_pool, buf, buf_phys);
+               return -EAGAIN;
+       }
+
+       memcpy(pad, key, key_len);
+       memset(pad + key_len, 0, HMAC_PAD_BLOCKLEN - key_len);
+       for (i = 0; i < HMAC_PAD_BLOCKLEN; i++) {
+               pad[i] ^= xpad;
+       }
+
+       crypt->data.tfm = tfm;
+       crypt->regist_ptr = pad;
+       crypt->regist_buf = buf;
+
+       crypt->auth_offs = 0;
+       crypt->auth_len = HMAC_PAD_BLOCKLEN;
+       crypt->crypto_ctx = ctx_addr;
+       crypt->src_buf = buf_phys;
+       crypt->icv_rev_aes = target;
+       crypt->mode = NPE_OP_HASH_GEN_ICV;
+       crypt->init_len = init_len;
+       crypt->ctl_flags |= CTL_FLAG_GEN_ICV;
+
+       buf->next = 0;
+       buf->buf_len = HMAC_PAD_BLOCKLEN;
+       buf->pkt_len = 0;
+       buf->phys_addr = pad_phys;
+
+       atomic_inc(&ctx->configuring);
+       qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
+       BUG_ON(qmgr_stat_overflow(SEND_QID));
+       return 0;
+}
+
+static int setup_auth(struct crypto_tfm *tfm, int encrypt, unsigned authsize,
+               const u8 *key, int key_len, unsigned digest_len)
+{
+       u32 itarget, otarget, npe_ctx_addr;
+       unsigned char *cinfo;
+       int init_len, ret = 0;
+       u32 cfgword;
+       struct ix_sa_dir *dir;
+       struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
+       const struct ix_hash_algo *algo;
+
+       dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
+       cinfo = dir->npe_ctx + dir->npe_ctx_idx;
+       algo = ix_hash(tfm);
+
+       /* write cfg word to cryptinfo */
+       cfgword = algo->cfgword | ( authsize << 6); /* (authsize/4) << 8 */
+       *(u32*)cinfo = cpu_to_be32(cfgword);
+       cinfo += sizeof(cfgword);
+
+       /* write ICV to cryptinfo */
+       memcpy(cinfo, algo->icv, digest_len);
+       cinfo += digest_len;
+
+       itarget = dir->npe_ctx_phys + dir->npe_ctx_idx
+                               + sizeof(algo->cfgword);
+       otarget = itarget + digest_len;
+       init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx);
+       npe_ctx_addr = dir->npe_ctx_phys + dir->npe_ctx_idx;
+
+       dir->npe_ctx_idx += init_len;
+       dir->npe_mode |= NPE_OP_HASH_ENABLE;
+
+       if (!encrypt)
+               dir->npe_mode |= NPE_OP_HASH_VERIFY;
+
+       ret = register_chain_var(tfm, HMAC_OPAD_VALUE, otarget,
+                       init_len, npe_ctx_addr, key, key_len);
+       if (ret)
+               return ret;
+       return register_chain_var(tfm, HMAC_IPAD_VALUE, itarget,
+                       init_len, npe_ctx_addr, key, key_len);
+}
+
+static int gen_rev_aes_key(struct crypto_tfm *tfm)
+{
+       struct crypt_ctl *crypt;
+       struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
+       struct ix_sa_dir *dir = &ctx->decrypt;
+
+       crypt = get_crypt_desc_emerg();
+       if (!crypt) {
+               return -EAGAIN;
+       }
+       *(u32*)dir->npe_ctx |= cpu_to_be32(CIPH_ENCR);
+
+       crypt->data.tfm = tfm;
+       crypt->crypt_offs = 0;
+       crypt->crypt_len = AES_BLOCK128;
+       crypt->src_buf = 0;
+       crypt->crypto_ctx = dir->npe_ctx_phys;
+       crypt->icv_rev_aes = dir->npe_ctx_phys + sizeof(u32);
+       crypt->mode = NPE_OP_ENC_GEN_KEY;
+       crypt->init_len = dir->npe_ctx_idx;
+       crypt->ctl_flags |= CTL_FLAG_GEN_REVAES;
+
+       atomic_inc(&ctx->configuring);
+       qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
+       BUG_ON(qmgr_stat_overflow(SEND_QID));
+       return 0;
+}
+
+static int setup_cipher(struct crypto_tfm *tfm, int encrypt,
+               const u8 *key, int key_len)
+{
+       u8 *cinfo;
+       u32 cipher_cfg;
+       u32 keylen_cfg = 0;
+       struct ix_sa_dir *dir;
+       struct ixp_ctx *ctx = crypto_tfm_ctx(tfm);
+       u32 *flags = &tfm->crt_flags;
+
+       dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
+       cinfo = dir->npe_ctx;
+
+       if (encrypt) {
+               cipher_cfg = cipher_cfg_enc(tfm);
+               dir->npe_mode |= NPE_OP_CRYPT_ENCRYPT;
+       } else {
+               cipher_cfg = cipher_cfg_dec(tfm);
+       }
+       if (cipher_cfg & MOD_AES) {
+               switch (key_len) {
+                       case 16: keylen_cfg = MOD_AES128 | KEYLEN_128; break;
+                       case 24: keylen_cfg = MOD_AES192 | KEYLEN_192; break;
+                       case 32: keylen_cfg = MOD_AES256 | KEYLEN_256; break;
+                       default:
+                               *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+                               return -EINVAL;
+               }
+               cipher_cfg |= keylen_cfg;
+       } else if (cipher_cfg & MOD_3DES) {
+               const u32 *K = (const u32 *)key;
+               if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
+                            !((K[2] ^ K[4]) | (K[3] ^ K[5]))))
+               {
+                       *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED;
+                       return -EINVAL;
+               }
+       } else {
+               u32 tmp[DES_EXPKEY_WORDS];
+               if (des_ekey(tmp, key) == 0) {
+                       *flags |= CRYPTO_TFM_RES_WEAK_KEY;
+               }
+       }
+       /* write cfg word to cryptinfo */
+       *(u32*)cinfo = cpu_to_be32(cipher_cfg);
+       cinfo += sizeof(cipher_cfg);
+
+       /* write cipher key to cryptinfo */
+       memcpy(cinfo, key, key_len);
+       /* NPE wants keylen set to DES3_EDE_KEY_SIZE even for single DES */
+       if (key_len < DES3_EDE_KEY_SIZE && !(cipher_cfg & MOD_AES)) {
+               memset(cinfo + key_len, 0, DES3_EDE_KEY_SIZE -key_len);
+               key_len = DES3_EDE_KEY_SIZE;
+       }
+       dir->npe_ctx_idx = sizeof(cipher_cfg) + key_len;
+       dir->npe_mode |= NPE_OP_CRYPT_ENABLE;
+       if ((cipher_cfg & MOD_AES) && !encrypt) {
+               return gen_rev_aes_key(tfm);
+       }
+       return 0;
+}
+
+static int count_sg(struct scatterlist *sg, int nbytes)
+{
+       int i;
+       for (i = 0; nbytes > 0; i++, sg = sg_next(sg))
+               nbytes -= sg->length;
+       return i;
+}
+
+static struct buffer_desc *chainup_buffers(struct scatterlist *sg,
+                       unsigned nbytes, struct buffer_desc *buf, gfp_t flags)
+{
+       int nents = 0;
+
+       while (nbytes > 0) {
+               struct buffer_desc *next_buf;
+               u32 next_buf_phys;
+               unsigned len = min(nbytes, sg_dma_len(sg));
+
+               nents++;
+               nbytes -= len;
+               if (!buf->phys_addr) {
+                       buf->phys_addr = sg_dma_address(sg);
+                       buf->buf_len = len;
+                       buf->next = NULL;
+                       buf->phys_next = 0;
+                       goto next;
+               }
+               /* Two consecutive chunks on one page may be handled by the old
+                * buffer descriptor, increased by the length of the new one
+                */
+               if (sg_dma_address(sg) == buf->phys_addr + buf->buf_len) {
+                       buf->buf_len += len;
+                       goto next;
+               }
+               next_buf = dma_pool_alloc(buffer_pool, flags, &next_buf_phys);
+               if (!next_buf)
+                       return NULL;
+               buf->next = next_buf;
+               buf->phys_next = next_buf_phys;
+
+               buf = next_buf;
+               buf->next = NULL;
+               buf->phys_next = 0;
+               buf->phys_addr = sg_dma_address(sg);
+               buf->buf_len = len;
+next:
+               if (nbytes > 0) {
+                       sg = sg_next(sg);
+               }
+       }
+       return buf;
+}
+
+static int ablk_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+                       unsigned int key_len)
+{
+       struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+       u32 *flags = &tfm->base.crt_flags;
+       int ret;
+
+       init_completion(&ctx->completion);
+       atomic_inc(&ctx->configuring);
+
+       reset_sa_dir(&ctx->encrypt);
+       reset_sa_dir(&ctx->decrypt);
+
+       ctx->encrypt.npe_mode = NPE_OP_HMAC_DISABLE;
+       ctx->decrypt.npe_mode = NPE_OP_HMAC_DISABLE;
+
+       ret = setup_cipher(&tfm->base, 0, key, key_len);
+       if (ret)
+               goto out;
+       ret = setup_cipher(&tfm->base, 1, key, key_len);
+       if (ret)
+               goto out;
+
+       if (*flags & CRYPTO_TFM_RES_WEAK_KEY) {
+               if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) {
+                       ret = -EINVAL;
+               } else {
+                       *flags &= ~CRYPTO_TFM_RES_WEAK_KEY;
+               }
+       }
+out:
+       if (!atomic_dec_and_test(&ctx->configuring))
+               wait_for_completion(&ctx->completion);
+       return ret;
+}
+
+static int ablk_rfc3686_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+               unsigned int key_len)
+{
+       struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+
+       /* the nonce is stored in bytes at end of key */
+       if (key_len < CTR_RFC3686_NONCE_SIZE)
+               return -EINVAL;
+
+       memcpy(ctx->nonce, key + (key_len - CTR_RFC3686_NONCE_SIZE),
+                       CTR_RFC3686_NONCE_SIZE);
+
+       key_len -= CTR_RFC3686_NONCE_SIZE;
+       return ablk_setkey(tfm, key, key_len);
+}
+
+static int ablk_perform(struct ablkcipher_request *req, int encrypt)
+{
+       struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
+       struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+       unsigned ivsize = crypto_ablkcipher_ivsize(tfm);
+       int ret = -ENOMEM;
+       struct ix_sa_dir *dir;
+       struct crypt_ctl *crypt;
+       unsigned int nbytes = req->nbytes, nents;
+       enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
+       struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req);
+       gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
+                               GFP_KERNEL : GFP_ATOMIC;
+
+       if (qmgr_stat_full(SEND_QID))
+               return -EAGAIN;
+       if (atomic_read(&ctx->configuring))
+               return -EAGAIN;
+
+       dir = encrypt ? &ctx->encrypt : &ctx->decrypt;
+
+       crypt = get_crypt_desc();
+       if (!crypt)
+               return ret;
+
+       crypt->data.ablk_req = req;
+       crypt->crypto_ctx = dir->npe_ctx_phys;
+       crypt->mode = dir->npe_mode;
+       crypt->init_len = dir->npe_ctx_idx;
+
+       crypt->crypt_offs = 0;
+       crypt->crypt_len = nbytes;
+
+       BUG_ON(ivsize && !req->info);
+       memcpy(crypt->iv, req->info, ivsize);
+       if (req->src != req->dst) {
+               crypt->mode |= NPE_OP_NOT_IN_PLACE;
+               nents = count_sg(req->dst, nbytes);
+               /* This was never tested by Intel
+                * for more than one dst buffer, I think. */
+               BUG_ON(nents != 1);
+               req_ctx->dst_nents = nents;
+               dma_map_sg(dev, req->dst, nents, DMA_FROM_DEVICE);
+               req_ctx->dst = dma_pool_alloc(buffer_pool, flags,&crypt->dst_buf);
+               if (!req_ctx->dst)
+                       goto unmap_sg_dest;
+               req_ctx->dst->phys_addr = 0;
+               if (!chainup_buffers(req->dst, nbytes, req_ctx->dst, flags))
+                       goto free_buf_dest;
+               src_direction = DMA_TO_DEVICE;
+       } else {
+               req_ctx->dst = NULL;
+               req_ctx->dst_nents = 0;
+       }
+       nents = count_sg(req->src, nbytes);
+       req_ctx->src_nents = nents;
+       dma_map_sg(dev, req->src, nents, src_direction);
+
+       req_ctx->src = dma_pool_alloc(buffer_pool, flags, &crypt->src_buf);
+       if (!req_ctx->src)
+               goto unmap_sg_src;
+       req_ctx->src->phys_addr = 0;
+       if (!chainup_buffers(req->src, nbytes, req_ctx->src, flags))
+               goto free_buf_src;
+
+       crypt->ctl_flags |= CTL_FLAG_PERFORM_ABLK;
+       qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
+       BUG_ON(qmgr_stat_overflow(SEND_QID));
+       return -EINPROGRESS;
+
+free_buf_src:
+       free_buf_chain(req_ctx->src, crypt->src_buf);
+unmap_sg_src:
+       dma_unmap_sg(dev, req->src, req_ctx->src_nents, src_direction);
+free_buf_dest:
+       if (req->src != req->dst) {
+               free_buf_chain(req_ctx->dst, crypt->dst_buf);
+unmap_sg_dest:
+               dma_unmap_sg(dev, req->src, req_ctx->dst_nents,
+                       DMA_FROM_DEVICE);
+       }
+       crypt->ctl_flags = CTL_FLAG_UNUSED;
+       return ret;
+}
+
+static int ablk_encrypt(struct ablkcipher_request *req)
+{
+       return ablk_perform(req, 1);
+}
+
+static int ablk_decrypt(struct ablkcipher_request *req)
+{
+       return ablk_perform(req, 0);
+}
+
+static int ablk_rfc3686_crypt(struct ablkcipher_request *req)
+{
+       struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
+       struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+       u8 iv[CTR_RFC3686_BLOCK_SIZE];
+       u8 *info = req->info;
+       int ret;
+
+       /* set up counter block */
+        memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE);
+       memcpy(iv + CTR_RFC3686_NONCE_SIZE, info, CTR_RFC3686_IV_SIZE);
+
+       /* initialize counter portion of counter block */
+       *(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) =
+               cpu_to_be32(1);
+
+       req->info = iv;
+       ret = ablk_perform(req, 1);
+       req->info = info;
+       return ret;
+}
+
+static int hmac_inconsistent(struct scatterlist *sg, unsigned start,
+               unsigned int nbytes)
+{
+       int offset = 0;
+
+       if (!nbytes)
+               return 0;
+
+       for (;;) {
+               if (start < offset + sg->length)
+                       break;
+
+               offset += sg->length;
+               sg = sg_next(sg);
+       }
+       return (start + nbytes > offset + sg->length);
+}
+
+static int aead_perform(struct aead_request *req, int encrypt,
+               int cryptoffset, int eff_cryptlen, u8 *iv)
+{
+       struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+       struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
+       unsigned ivsize = crypto_aead_ivsize(tfm);
+       unsigned authsize = crypto_aead_authsize(tfm);
+       int ret = -ENOMEM;
+       struct ix_sa_dir *dir;
+       struct crypt_ctl *crypt;
+       unsigned int cryptlen, nents;
+       struct buffer_desc *buf;
+       struct aead_ctx *req_ctx = aead_request_ctx(req);
+       gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
+                               GFP_KERNEL : GFP_ATOMIC;
+
+       if (qmgr_stat_full(SEND_QID))
+               return -EAGAIN;
+       if (atomic_read(&ctx->configuring))
+               return -EAGAIN;
+
+       if (encrypt) {
+               dir = &ctx->encrypt;
+               cryptlen = req->cryptlen;
+       } else {
+               dir = &ctx->decrypt;
+               /* req->cryptlen includes the authsize when decrypting */
+               cryptlen = req->cryptlen -authsize;
+               eff_cryptlen -= authsize;
+       }
+       crypt = get_crypt_desc();
+       if (!crypt)
+               return ret;
+
+       crypt->data.aead_req = req;
+       crypt->crypto_ctx = dir->npe_ctx_phys;
+       crypt->mode = dir->npe_mode;
+       crypt->init_len = dir->npe_ctx_idx;
+
+       crypt->crypt_offs = cryptoffset;
+       crypt->crypt_len = eff_cryptlen;
+
+       crypt->auth_offs = 0;
+       crypt->auth_len = req->assoclen + ivsize + cryptlen;
+       BUG_ON(ivsize && !req->iv);
+       memcpy(crypt->iv, req->iv, ivsize);
+
+       if (req->src != req->dst) {
+               BUG(); /* -ENOTSUP because of my lazyness */
+       }
+
+       req_ctx->buffer = dma_pool_alloc(buffer_pool, flags, &crypt->src_buf);
+       if (!req_ctx->buffer)
+               goto out;
+       req_ctx->buffer->phys_addr = 0;
+       /* ASSOC data */
+       nents = count_sg(req->assoc, req->assoclen);
+       req_ctx->assoc_nents = nents;
+       dma_map_sg(dev, req->assoc, nents, DMA_TO_DEVICE);
+       buf = chainup_buffers(req->assoc, req->assoclen, req_ctx->buffer,flags);
+       if (!buf)
+               goto unmap_sg_assoc;
+       /* IV */
+       sg_init_table(&req_ctx->ivlist, 1);
+       sg_set_buf(&req_ctx->ivlist, iv, ivsize);
+       dma_map_sg(dev, &req_ctx->ivlist, 1, DMA_BIDIRECTIONAL);
+       buf = chainup_buffers(&req_ctx->ivlist, ivsize, buf, flags);
+       if (!buf)
+               goto unmap_sg_iv;
+       if (unlikely(hmac_inconsistent(req->src, cryptlen, authsize))) {
+               /* The 12 hmac bytes are scattered,
+                * we need to copy them into a safe buffer */
+               req_ctx->hmac_virt = dma_pool_alloc(buffer_pool, flags,
+                               &crypt->icv_rev_aes);
+               if (unlikely(!req_ctx->hmac_virt))
+                       goto unmap_sg_iv;
+               if (!encrypt) {
+                       scatterwalk_map_and_copy(req_ctx->hmac_virt,
+                               req->src, cryptlen, authsize, 0);
+               }
+               req_ctx->encrypt = encrypt;
+       } else {
+               req_ctx->hmac_virt = NULL;
+       }
+       /* Crypt */
+       nents = count_sg(req->src, cryptlen + authsize);
+       req_ctx->src_nents = nents;
+       dma_map_sg(dev, req->src, nents, DMA_BIDIRECTIONAL);
+       buf = chainup_buffers(req->src, cryptlen + authsize, buf, flags);
+       if (!buf)
+               goto unmap_sg_src;
+       if (!req_ctx->hmac_virt) {
+               crypt->icv_rev_aes = buf->phys_addr + buf->buf_len - authsize;
+       }
+       crypt->ctl_flags |= CTL_FLAG_PERFORM_AEAD;
+       qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
+       BUG_ON(qmgr_stat_overflow(SEND_QID));
+       return -EINPROGRESS;
+unmap_sg_src:
+       dma_unmap_sg(dev, req->src, req_ctx->src_nents, DMA_BIDIRECTIONAL);
+       if (req_ctx->hmac_virt) {
+               dma_pool_free(buffer_pool, req_ctx->hmac_virt,
+                               crypt->icv_rev_aes);
+       }
+unmap_sg_iv:
+       dma_unmap_sg(dev, &req_ctx->ivlist, 1, DMA_BIDIRECTIONAL);
+unmap_sg_assoc:
+       dma_unmap_sg(dev, req->assoc, req_ctx->assoc_nents, DMA_TO_DEVICE);
+       free_buf_chain(req_ctx->buffer, crypt->src_buf);
+out:
+       crypt->ctl_flags = CTL_FLAG_UNUSED;
+       return ret;
+}
+
+static int aead_setup(struct crypto_aead *tfm, unsigned int authsize)
+{
+       struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
+       u32 *flags = &tfm->base.crt_flags;
+       unsigned digest_len = crypto_aead_alg(tfm)->maxauthsize;
+       int ret;
+
+       if (!ctx->enckey_len && !ctx->authkey_len)
+               return 0;
+       init_completion(&ctx->completion);
+       atomic_inc(&ctx->configuring);
+
+       reset_sa_dir(&ctx->encrypt);
+       reset_sa_dir(&ctx->decrypt);
+
+       ret = setup_cipher(&tfm->base, 0, ctx->enckey, ctx->enckey_len);
+       if (ret)
+               goto out;
+       ret = setup_cipher(&tfm->base, 1, ctx->enckey, ctx->enckey_len);
+       if (ret)
+               goto out;
+       ret = setup_auth(&tfm->base, 0, authsize, ctx->authkey,
+                       ctx->authkey_len, digest_len);
+       if (ret)
+               goto out;
+       ret = setup_auth(&tfm->base, 1, authsize,  ctx->authkey,
+                       ctx->authkey_len, digest_len);
+       if (ret)
+               goto out;
+
+       if (*flags & CRYPTO_TFM_RES_WEAK_KEY) {
+               if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) {
+                       ret = -EINVAL;
+                       goto out;
+               } else {
+                       *flags &= ~CRYPTO_TFM_RES_WEAK_KEY;
+               }
+       }
+out:
+       if (!atomic_dec_and_test(&ctx->configuring))
+               wait_for_completion(&ctx->completion);
+       return ret;
+}
+
+static int aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
+{
+       int max = crypto_aead_alg(tfm)->maxauthsize >> 2;
+
+       if ((authsize>>2) < 1 || (authsize>>2) > max || (authsize & 3))
+               return -EINVAL;
+       return aead_setup(tfm, authsize);
+}
+
+static int aead_setkey(struct crypto_aead *tfm, const u8 *key,
+                       unsigned int keylen)
+{
+       struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
+       struct rtattr *rta = (struct rtattr *)key;
+       struct crypto_authenc_key_param *param;
+
+       if (!RTA_OK(rta, keylen))
+               goto badkey;
+       if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
+               goto badkey;
+       if (RTA_PAYLOAD(rta) < sizeof(*param))
+               goto badkey;
+
+       param = RTA_DATA(rta);
+       ctx->enckey_len = be32_to_cpu(param->enckeylen);
+
+       key += RTA_ALIGN(rta->rta_len);
+       keylen -= RTA_ALIGN(rta->rta_len);
+
+       if (keylen < ctx->enckey_len)
+               goto badkey;
+
+       ctx->authkey_len = keylen - ctx->enckey_len;
+       memcpy(ctx->enckey, key + ctx->authkey_len, ctx->enckey_len);
+       memcpy(ctx->authkey, key, ctx->authkey_len);
+
+       return aead_setup(tfm, crypto_aead_authsize(tfm));
+badkey:
+       ctx->enckey_len = 0;
+       crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+       return -EINVAL;
+}
+
+static int aead_encrypt(struct aead_request *req)
+{
+       unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req));
+       return aead_perform(req, 1, req->assoclen + ivsize,
+                       req->cryptlen, req->iv);
+}
+
+static int aead_decrypt(struct aead_request *req)
+{
+       unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req));
+       return aead_perform(req, 0, req->assoclen + ivsize,
+                       req->cryptlen, req->iv);
+}
+
+static int aead_givencrypt(struct aead_givcrypt_request *req)
+{
+       struct crypto_aead *tfm = aead_givcrypt_reqtfm(req);
+       struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
+       unsigned len, ivsize = crypto_aead_ivsize(tfm);
+       __be64 seq;
+
+       /* copied from eseqiv.c */
+       if (!ctx->salted) {
+               get_random_bytes(ctx->salt, ivsize);
+               ctx->salted = 1;
+       }
+       memcpy(req->areq.iv, ctx->salt, ivsize);
+       len = ivsize;
+       if (ivsize > sizeof(u64)) {
+               memset(req->giv, 0, ivsize - sizeof(u64));
+               len = sizeof(u64);
+       }
+       seq = cpu_to_be64(req->seq);
+       memcpy(req->giv + ivsize - len, &seq, len);
+       return aead_perform(&req->areq, 1, req->areq.assoclen,
+                       req->areq.cryptlen +ivsize, req->giv);
+}
+
+static struct ixp_alg ixp4xx_algos[] = {
+{
+       .crypto = {
+               .cra_name       = "cbc(des)",
+               .cra_blocksize  = DES_BLOCK_SIZE,
+               .cra_u          = { .ablkcipher = {
+                       .min_keysize    = DES_KEY_SIZE,
+                       .max_keysize    = DES_KEY_SIZE,
+                       .ivsize         = DES_BLOCK_SIZE,
+                       .geniv          = "eseqiv",
+                       }
+               }
+       },
+       .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
+       .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
+
+}, {
+       .crypto = {
+               .cra_name       = "ecb(des)",
+               .cra_blocksize  = DES_BLOCK_SIZE,
+               .cra_u          = { .ablkcipher = {
+                       .min_keysize    = DES_KEY_SIZE,
+                       .max_keysize    = DES_KEY_SIZE,
+                       }
+               }
+       },
+       .cfg_enc = CIPH_ENCR | MOD_DES | MOD_ECB | KEYLEN_192,
+       .cfg_dec = CIPH_DECR | MOD_DES | MOD_ECB | KEYLEN_192,
+}, {
+       .crypto = {
+               .cra_name       = "cbc(des3_ede)",
+               .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
+               .cra_u          = { .ablkcipher = {
+                       .min_keysize    = DES3_EDE_KEY_SIZE,
+                       .max_keysize    = DES3_EDE_KEY_SIZE,
+                       .ivsize         = DES3_EDE_BLOCK_SIZE,
+                       .geniv          = "eseqiv",
+                       }
+               }
+       },
+       .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
+       .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
+}, {
+       .crypto = {
+               .cra_name       = "ecb(des3_ede)",
+               .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
+               .cra_u          = { .ablkcipher = {
+                       .min_keysize    = DES3_EDE_KEY_SIZE,
+                       .max_keysize    = DES3_EDE_KEY_SIZE,
+                       }
+               }
+       },
+       .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_ECB | KEYLEN_192,
+       .cfg_dec = CIPH_DECR | MOD_3DES | MOD_ECB | KEYLEN_192,
+}, {
+       .crypto = {
+               .cra_name       = "cbc(aes)",
+               .cra_blocksize  = AES_BLOCK_SIZE,
+               .cra_u          = { .ablkcipher = {
+                       .min_keysize    = AES_MIN_KEY_SIZE,
+                       .max_keysize    = AES_MAX_KEY_SIZE,
+                       .ivsize         = AES_BLOCK_SIZE,
+                       .geniv          = "eseqiv",
+                       }
+               }
+       },
+       .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
+       .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
+}, {
+       .crypto = {
+               .cra_name       = "ecb(aes)",
+               .cra_blocksize  = AES_BLOCK_SIZE,
+               .cra_u          = { .ablkcipher = {
+                       .min_keysize    = AES_MIN_KEY_SIZE,
+                       .max_keysize    = AES_MAX_KEY_SIZE,
+                       }
+               }
+       },
+       .cfg_enc = CIPH_ENCR | MOD_AES | MOD_ECB,
+       .cfg_dec = CIPH_DECR | MOD_AES | MOD_ECB,
+}, {
+       .crypto = {
+               .cra_name       = "ctr(aes)",
+               .cra_blocksize  = AES_BLOCK_SIZE,
+               .cra_u          = { .ablkcipher = {
+                       .min_keysize    = AES_MIN_KEY_SIZE,
+                       .max_keysize    = AES_MAX_KEY_SIZE,
+                       .ivsize         = AES_BLOCK_SIZE,
+                       .geniv          = "eseqiv",
+                       }
+               }
+       },
+       .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
+       .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
+}, {
+       .crypto = {
+               .cra_name       = "rfc3686(ctr(aes))",
+               .cra_blocksize  = AES_BLOCK_SIZE,
+               .cra_u          = { .ablkcipher = {
+                       .min_keysize    = AES_MIN_KEY_SIZE,
+                       .max_keysize    = AES_MAX_KEY_SIZE,
+                       .ivsize         = AES_BLOCK_SIZE,
+                       .geniv          = "eseqiv",
+                       .setkey         = ablk_rfc3686_setkey,
+                       .encrypt        = ablk_rfc3686_crypt,
+                       .decrypt        = ablk_rfc3686_crypt }
+               }
+       },
+       .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
+       .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
+}, {
+       .crypto = {
+               .cra_name       = "authenc(hmac(md5),cbc(des))",
+               .cra_blocksize  = DES_BLOCK_SIZE,
+               .cra_u          = { .aead = {
+                       .ivsize         = DES_BLOCK_SIZE,
+                       .maxauthsize    = MD5_DIGEST_SIZE,
+                       }
+               }
+       },
+       .hash = &hash_alg_md5,
+       .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
+       .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
+}, {
+       .crypto = {
+               .cra_name       = "authenc(hmac(md5),cbc(des3_ede))",
+               .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
+               .cra_u          = { .aead = {
+                       .ivsize         = DES3_EDE_BLOCK_SIZE,
+                       .maxauthsize    = MD5_DIGEST_SIZE,
+                       }
+               }
+       },
+       .hash = &hash_alg_md5,
+       .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
+       .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
+}, {
+       .crypto = {
+               .cra_name       = "authenc(hmac(sha1),cbc(des))",
+               .cra_blocksize  = DES_BLOCK_SIZE,
+               .cra_u          = { .aead = {
+                       .ivsize         = DES_BLOCK_SIZE,
+                       .maxauthsize    = SHA1_DIGEST_SIZE,
+                       }
+               }
+       },
+       .hash = &hash_alg_sha1,
+       .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
+       .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
+}, {
+       .crypto = {
+               .cra_name       = "authenc(hmac(sha1),cbc(des3_ede))",
+               .cra_blocksize  = DES3_EDE_BLOCK_SIZE,
+               .cra_u          = { .aead = {
+                       .ivsize         = DES3_EDE_BLOCK_SIZE,
+                       .maxauthsize    = SHA1_DIGEST_SIZE,
+                       }
+               }
+       },
+       .hash = &hash_alg_sha1,
+       .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
+       .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
+}, {
+       .crypto = {
+               .cra_name       = "authenc(hmac(md5),cbc(aes))",
+               .cra_blocksize  = AES_BLOCK_SIZE,
+               .cra_u          = { .aead = {
+                       .ivsize         = AES_BLOCK_SIZE,
+                       .maxauthsize    = MD5_DIGEST_SIZE,
+                       }
+               }
+       },
+       .hash = &hash_alg_md5,
+       .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
+       .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
+}, {
+       .crypto = {
+               .cra_name       = "authenc(hmac(sha1),cbc(aes))",
+               .cra_blocksize  = AES_BLOCK_SIZE,
+               .cra_u          = { .aead = {
+                       .ivsize         = AES_BLOCK_SIZE,
+                       .maxauthsize    = SHA1_DIGEST_SIZE,
+                       }
+               }
+       },
+       .hash = &hash_alg_sha1,
+       .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
+       .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
+} };
+
+#define IXP_POSTFIX "-ixp4xx"
+static int __init ixp_module_init(void)
+{
+       int num = ARRAY_SIZE(ixp4xx_algos);
+       int i,err ;
+
+       if (platform_device_register(&pseudo_dev))
+               return -ENODEV;
+
+       spin_lock_init(&desc_lock);
+       spin_lock_init(&emerg_lock);
+
+       err = init_ixp_crypto();
+       if (err) {
+               platform_device_unregister(&pseudo_dev);
+               return err;
+       }
+       for (i=0; i< num; i++) {
+               struct crypto_alg *cra = &ixp4xx_algos[i].crypto;
+
+               if (snprintf(cra->cra_driver_name, CRYPTO_MAX_ALG_NAME,
+                       "%s"IXP_POSTFIX, cra->cra_name) >=
+                       CRYPTO_MAX_ALG_NAME)
+               {
+                       continue;
+               }
+               if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES)) {
+                       continue;
+               }
+               if (!ixp4xx_algos[i].hash) {
+                       /* block ciphers */
+                       cra->cra_type = &crypto_ablkcipher_type;
+                       cra->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+                                        CRYPTO_ALG_ASYNC;
+                       if (!cra->cra_ablkcipher.setkey)
+                               cra->cra_ablkcipher.setkey = ablk_setkey;
+                       if (!cra->cra_ablkcipher.encrypt)
+                               cra->cra_ablkcipher.encrypt = ablk_encrypt;
+                       if (!cra->cra_ablkcipher.decrypt)
+                               cra->cra_ablkcipher.decrypt = ablk_decrypt;
+                       cra->cra_init = init_tfm_ablk;
+               } else {
+                       /* authenc */
+                       cra->cra_type = &crypto_aead_type;
+                       cra->cra_flags = CRYPTO_ALG_TYPE_AEAD |
+                                        CRYPTO_ALG_ASYNC;
+                       cra->cra_aead.setkey = aead_setkey;
+                       cra->cra_aead.setauthsize = aead_setauthsize;
+                       cra->cra_aead.encrypt = aead_encrypt;
+                       cra->cra_aead.decrypt = aead_decrypt;
+                       cra->cra_aead.givencrypt = aead_givencrypt;
+                       cra->cra_init = init_tfm_aead;
+               }
+               cra->cra_ctxsize = sizeof(struct ixp_ctx);
+               cra->cra_module = THIS_MODULE;
+               cra->cra_alignmask = 3;
+               cra->cra_priority = 300;
+               cra->cra_exit = exit_tfm;
+               if (crypto_register_alg(cra))
+                       printk(KERN_ERR "Failed to register '%s'\n",
+                               cra->cra_name);
+               else
+                       ixp4xx_algos[i].registered = 1;
+       }
+       return 0;
+}
+
+static void __exit ixp_module_exit(void)
+{
+       int num = ARRAY_SIZE(ixp4xx_algos);
+       int i;
+
+       for (i=0; i< num; i++) {
+               if (ixp4xx_algos[i].registered)
+                       crypto_unregister_alg(&ixp4xx_algos[i].crypto);
+       }
+       release_ixp_crypto();
+       platform_device_unregister(&pseudo_dev);
+}
+
+module_init(ixp_module_init);
+module_exit(ixp_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>");
+MODULE_DESCRIPTION("IXP4xx hardware crypto");
+