[generic-2.4] add OCF 20100325 support to brcm-2.4

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21357 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 1428 insertions, 0 deletions

diff --git a/target/linux/generic-2.4/files/crypto/ocf/ixp4xx/Makefile b/target/linux/generic-2.4/files/crypto/ocf/ixp4xx/Makefile
new file mode 100644
index 000000000..d94a3b79f
--- /dev/null
+++ b/target/linux/generic-2.4/files/crypto/ocf/ixp4xx/Makefile
@@ -0,0 +1,104 @@
+# for SGlinux builds
+-include $(ROOTDIR)/modules/.config
+
+#
+# You will need to point this at your Intel ixp425 includes,  this portion
+# of the Makefile only really works under SGLinux with the appropriate libs
+# installed.  They can be downloaded from http://www.snapgear.org/
+#
+ifeq ($(CONFIG_CPU_IXP46X),y)
+IXPLATFORM = ixp46X
+else
+ifeq ($(CONFIG_CPU_IXP43X),y)
+IXPLATFORM = ixp43X
+else
+IXPLATFORM = ixp42X
+endif
+endif
+
+ifdef CONFIG_IXP400_LIB_2_4
+IX_XSCALE_SW = $(ROOTDIR)/modules/ixp425/ixp400-2.4/ixp400_xscale_sw
+OSAL_DIR     = $(ROOTDIR)/modules/ixp425/ixp400-2.4/ixp_osal
+endif
+ifdef CONFIG_IXP400_LIB_2_1
+IX_XSCALE_SW = $(ROOTDIR)/modules/ixp425/ixp400-2.1/ixp400_xscale_sw
+OSAL_DIR     = $(ROOTDIR)/modules/ixp425/ixp400-2.1/ixp_osal
+endif
+ifdef CONFIG_IXP400_LIB_2_0
+IX_XSCALE_SW = $(ROOTDIR)/modules/ixp425/ixp400-2.0/ixp400_xscale_sw
+OSAL_DIR     = $(ROOTDIR)/modules/ixp425/ixp400-2.0/ixp_osal
+endif
+ifdef IX_XSCALE_SW
+ifdef CONFIG_IXP400_LIB_2_4
+IXP_CFLAGS = \
+	-I$(ROOTDIR)/. \
+	-I$(IX_XSCALE_SW)/src/include \
+	-I$(OSAL_DIR)/common/include/ \
+	-I$(OSAL_DIR)/common/include/modules/ \
+	-I$(OSAL_DIR)/common/include/modules/ddk/ \
+	-I$(OSAL_DIR)/common/include/modules/bufferMgt/ \
+	-I$(OSAL_DIR)/common/include/modules/ioMem/ \
+	-I$(OSAL_DIR)/common/os/linux/include/ \
+	-I$(OSAL_DIR)/common/os/linux/include/core/  \
+	-I$(OSAL_DIR)/common/os/linux/include/modules/ \
+	-I$(OSAL_DIR)/common/os/linux/include/modules/ddk/ \
+	-I$(OSAL_DIR)/common/os/linux/include/modules/bufferMgt/ \
+	-I$(OSAL_DIR)/common/os/linux/include/modules/ioMem/ \
+	-I$(OSAL_DIR)/platforms/$(IXPLATFORM)/include/ \
+	-I$(OSAL_DIR)/platforms/$(IXPLATFORM)/os/linux/include/ \
+	-DENABLE_IOMEM -DENABLE_BUFFERMGT -DENABLE_DDK \
+	-DUSE_IXP4XX_CRYPTO
+else
+IXP_CFLAGS = \
+	-I$(ROOTDIR)/. \
+	-I$(IX_XSCALE_SW)/src/include \
+	-I$(OSAL_DIR)/ \
+	-I$(OSAL_DIR)/os/linux/include/ \
+	-I$(OSAL_DIR)/os/linux/include/modules/ \
+	-I$(OSAL_DIR)/os/linux/include/modules/ioMem/ \
+	-I$(OSAL_DIR)/os/linux/include/modules/bufferMgt/ \
+	-I$(OSAL_DIR)/os/linux/include/core/  \
+	-I$(OSAL_DIR)/os/linux/include/platforms/ \
+	-I$(OSAL_DIR)/os/linux/include/platforms/ixp400/ \
+	-I$(OSAL_DIR)/os/linux/include/platforms/ixp400/ixp425 \
+	-I$(OSAL_DIR)/os/linux/include/platforms/ixp400/ixp465 \
+	-I$(OSAL_DIR)/os/linux/include/core/ \
+	-I$(OSAL_DIR)/include/ \
+	-I$(OSAL_DIR)/include/modules/ \
+	-I$(OSAL_DIR)/include/modules/bufferMgt/ \
+	-I$(OSAL_DIR)/include/modules/ioMem/ \
+	-I$(OSAL_DIR)/include/platforms/ \
+	-I$(OSAL_DIR)/include/platforms/ixp400/ \
+	-DUSE_IXP4XX_CRYPTO
+endif
+endif
+ifdef CONFIG_IXP400_LIB_1_4
+IXP_CFLAGS   = \
+	-I$(ROOTDIR)/. \
+	-I$(ROOTDIR)/modules/ixp425/ixp400-1.4/ixp400_xscale_sw/src/include \
+	-I$(ROOTDIR)/modules/ixp425/ixp400-1.4/ixp400_xscale_sw/src/linux \
+	-DUSE_IXP4XX_CRYPTO
+endif
+ifndef IXPDIR
+IXPDIR = ixp-version-is-not-supported
+endif
+
+ifeq ($(CONFIG_CPU_IXP46X),y)
+IXP_CFLAGS += -D__ixp46X
+else
+ifeq ($(CONFIG_CPU_IXP43X),y)
+IXP_CFLAGS += -D__ixp43X
+else
+IXP_CFLAGS += -D__ixp42X
+endif
+endif
+
+obj-$(CONFIG_OCF_IXP4XX) += ixp4xx.o
+
+obj ?= .
+EXTRA_CFLAGS += $(IXP_CFLAGS) -I$(obj)/.. -I$(obj)/.
+
+ifdef TOPDIR
+-include $(TOPDIR)/Rules.make
+endif
+
diff --git a/target/linux/generic-2.4/files/crypto/ocf/ixp4xx/ixp4xx.c b/target/linux/generic-2.4/files/crypto/ocf/ixp4xx/ixp4xx.c
new file mode 100644
index 000000000..d5414a4ef
--- /dev/null
+++ b/target/linux/generic-2.4/files/crypto/ocf/ixp4xx/ixp4xx.c
@@ -0,0 +1,1324 @@
+/*
+ * An OCF module that uses Intels IXP CryptACC API to do the crypto.
+ * This driver requires the IXP400 Access Library that is available
+ * from Intel in order to operate (or compile).
+ *
+ * Written by David McCullough <david_mccullough@mcafee.com>
+ * Copyright (C) 2006-2010 David McCullough
+ * Copyright (C) 2004-2005 Intel Corporation.
+ *
+ * LICENSE TERMS
+ *
+ * The free distribution and use of this software in both source and binary
+ * form is allowed (with or without changes) provided that:
+ *
+ *   1. distributions of this source code include the above copyright
+ *      notice, this list of conditions and the following disclaimer;
+ *
+ *   2. distributions in binary form include the above copyright
+ *      notice, this list of conditions and the following disclaimer
+ *      in the documentation and/or other associated materials;
+ *
+ *   3. the copyright holder's name is not used to endorse products
+ *      built using this software without specific written permission.
+ *
+ * ALTERNATIVELY, provided that this notice is retained in full, this product
+ * may be distributed under the terms of the GNU General Public License (GPL),
+ * in which case the provisions of the GPL apply INSTEAD OF those given above.
+ *
+ * DISCLAIMER
+ *
+ * This software is provided 'as is' with no explicit or implied warranties
+ * in respect of its properties, including, but not limited to, correctness
+ * and/or fitness for purpose.
+ */
+
+#ifndef AUTOCONF_INCLUDED
+#include <linux/config.h>
+#endif
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/crypto.h>
+#include <linux/interrupt.h>
+#include <asm/scatterlist.h>
+
+#include <IxTypes.h>
+#include <IxOsBuffMgt.h>
+#include <IxNpeDl.h>
+#include <IxCryptoAcc.h>
+#include <IxQMgr.h>
+#include <IxOsServices.h>
+#include <IxOsCacheMMU.h>
+
+#include <cryptodev.h>
+#include <uio.h>
+
+#ifndef IX_MBUF_PRIV
+#define IX_MBUF_PRIV(x) ((x)->priv)
+#endif
+
+struct ixp_data;
+
+struct ixp_q {
+	struct list_head	 ixp_q_list;
+	struct ixp_data		*ixp_q_data;
+	struct cryptop		*ixp_q_crp;
+	struct cryptodesc	*ixp_q_ccrd;
+	struct cryptodesc	*ixp_q_acrd;
+	IX_MBUF				 ixp_q_mbuf;
+	UINT8				*ixp_hash_dest; /* Location for hash in client buffer */
+	UINT8				*ixp_hash_src; /* Location of hash in internal buffer */
+	unsigned char		 ixp_q_iv_data[IX_CRYPTO_ACC_MAX_CIPHER_IV_LENGTH];
+	unsigned char		*ixp_q_iv;
+};
+
+struct ixp_data {
+	int					 ixp_registered;	/* is the context registered */
+	int					 ixp_crd_flags;		/* detect direction changes */
+
+	int					 ixp_cipher_alg;
+	int					 ixp_auth_alg;
+
+	UINT32				 ixp_ctx_id;
+	UINT32				 ixp_hash_key_id;	/* used when hashing */
+	IxCryptoAccCtx		 ixp_ctx;
+	IX_MBUF				 ixp_pri_mbuf;
+	IX_MBUF				 ixp_sec_mbuf;
+
+	struct work_struct   ixp_pending_work;
+	struct work_struct   ixp_registration_work;
+	struct list_head	 ixp_q;				/* unprocessed requests */
+};
+
+#ifdef __ixp46X
+
+#define	MAX_IOP_SIZE	64	/* words */
+#define	MAX_OOP_SIZE	128
+
+#define	MAX_PARAMS		3
+
+struct ixp_pkq {
+	struct list_head			 pkq_list;
+	struct cryptkop				*pkq_krp;
+
+	IxCryptoAccPkeEauInOperands	 pkq_op;
+	IxCryptoAccPkeEauOpResult	 pkq_result;
+
+	UINT32						 pkq_ibuf0[MAX_IOP_SIZE];
+	UINT32						 pkq_ibuf1[MAX_IOP_SIZE];
+	UINT32						 pkq_ibuf2[MAX_IOP_SIZE];
+	UINT32						 pkq_obuf[MAX_OOP_SIZE];
+};
+
+static LIST_HEAD(ixp_pkq); /* current PK wait list */
+static struct ixp_pkq *ixp_pk_cur;
+static spinlock_t ixp_pkq_lock;
+
+#endif /* __ixp46X */
+
+static int ixp_blocked = 0;
+
+static int32_t			 ixp_id = -1;
+static struct ixp_data **ixp_sessions = NULL;
+static u_int32_t		 ixp_sesnum = 0;
+
+static int ixp_process(device_t, struct cryptop *, int);
+static int ixp_newsession(device_t, u_int32_t *, struct cryptoini *);
+static int ixp_freesession(device_t, u_int64_t);
+#ifdef __ixp46X
+static int ixp_kprocess(device_t, struct cryptkop *krp, int hint);
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
+static kmem_cache_t *qcache;
+#else
+static struct kmem_cache *qcache;
+#endif
+
+#define debug ixp_debug
+static int ixp_debug = 0;
+module_param(ixp_debug, int, 0644);
+MODULE_PARM_DESC(ixp_debug, "Enable debug");
+
+static int ixp_init_crypto = 1;
+module_param(ixp_init_crypto, int, 0444); /* RO after load/boot */
+MODULE_PARM_DESC(ixp_init_crypto, "Call ixCryptoAccInit (default is 1)");
+
+static void ixp_process_pending(void *arg);
+static void ixp_registration(void *arg);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+static void ixp_process_pending_wq(struct work_struct *work);
+static void ixp_registration_wq(struct work_struct *work);
+#endif
+
+/*
+ * dummy device structure
+ */
+
+static struct {
+	softc_device_decl	sc_dev;
+} ixpdev;
+
+static device_method_t ixp_methods = {
+	/* crypto device methods */
+	DEVMETHOD(cryptodev_newsession,	ixp_newsession),
+	DEVMETHOD(cryptodev_freesession,ixp_freesession),
+	DEVMETHOD(cryptodev_process,	ixp_process),
+#ifdef __ixp46X
+	DEVMETHOD(cryptodev_kprocess,	ixp_kprocess),
+#endif
+};
+
+/*
+ * Generate a new software session.
+ */
+static int
+ixp_newsession(device_t dev, u_int32_t *sid, struct cryptoini *cri)
+{
+	struct ixp_data *ixp;
+	u_int32_t i;
+#define AUTH_LEN(cri, def) \
+	(cri->cri_mlen ? cri->cri_mlen : (def))
+
+	dprintk("%s():alg %d\n", __FUNCTION__,cri->cri_alg);
+	if (sid == NULL || cri == NULL) {
+		dprintk("%s,%d - EINVAL\n", __FILE__, __LINE__);
+		return EINVAL;
+	}
+
+	if (ixp_sessions) {
+		for (i = 1; i < ixp_sesnum; i++)
+			if (ixp_sessions[i] == NULL)
+				break;
+	} else
+		i = 1;		/* NB: to silence compiler warning */
+
+	if (ixp_sessions == NULL || i == ixp_sesnum) {
+		struct ixp_data **ixpd;
+
+		if (ixp_sessions == NULL) {
+			i = 1; /* We leave ixp_sessions[0] empty */
+			ixp_sesnum = CRYPTO_SW_SESSIONS;
+		} else
+			ixp_sesnum *= 2;
+
+		ixpd = kmalloc(ixp_sesnum * sizeof(struct ixp_data *), SLAB_ATOMIC);
+		if (ixpd == NULL) {
+			/* Reset session number */
+			if (ixp_sesnum == CRYPTO_SW_SESSIONS)
+				ixp_sesnum = 0;
+			else
+				ixp_sesnum /= 2;
+			dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__);
+			return ENOBUFS;
+		}
+		memset(ixpd, 0, ixp_sesnum * sizeof(struct ixp_data *));
+
+		/* Copy existing sessions */
+		if (ixp_sessions) {
+			memcpy(ixpd, ixp_sessions,
+			    (ixp_sesnum / 2) * sizeof(struct ixp_data *));
+			kfree(ixp_sessions);
+		}
+
+		ixp_sessions = ixpd;
+	}
+
+	ixp_sessions[i] = (struct ixp_data *) kmalloc(sizeof(struct ixp_data),
+			SLAB_ATOMIC);
+	if (ixp_sessions[i] == NULL) {
+		ixp_freesession(NULL, i);
+		dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		return ENOBUFS;
+	}
+
+	*sid = i;
+
+	ixp = ixp_sessions[i];
+	memset(ixp, 0, sizeof(*ixp));
+
+	ixp->ixp_cipher_alg = -1;
+	ixp->ixp_auth_alg = -1;
+	ixp->ixp_ctx_id = -1;
+	INIT_LIST_HEAD(&ixp->ixp_q);
+
+	ixp->ixp_ctx.useDifferentSrcAndDestMbufs = 0;
+
+	while (cri) {
+		switch (cri->cri_alg) {
+		case CRYPTO_DES_CBC:
+			ixp->ixp_cipher_alg = cri->cri_alg;
+			ixp->ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_DES;
+			ixp->ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
+			ixp->ixp_ctx.cipherCtx.cipherKeyLen = (cri->cri_klen + 7) / 8;
+			ixp->ixp_ctx.cipherCtx.cipherBlockLen = IX_CRYPTO_ACC_DES_BLOCK_64;
+			ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen =
+						IX_CRYPTO_ACC_DES_IV_64;
+			memcpy(ixp->ixp_ctx.cipherCtx.key.cipherKey,
+					cri->cri_key, (cri->cri_klen + 7) / 8);
+			break;
+
+		case CRYPTO_3DES_CBC:
+			ixp->ixp_cipher_alg = cri->cri_alg;
+			ixp->ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_3DES;
+			ixp->ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
+			ixp->ixp_ctx.cipherCtx.cipherKeyLen = (cri->cri_klen + 7) / 8;
+			ixp->ixp_ctx.cipherCtx.cipherBlockLen = IX_CRYPTO_ACC_DES_BLOCK_64;
+			ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen =
+						IX_CRYPTO_ACC_DES_IV_64;
+			memcpy(ixp->ixp_ctx.cipherCtx.key.cipherKey,
+					cri->cri_key, (cri->cri_klen + 7) / 8);
+			break;
+
+		case CRYPTO_RIJNDAEL128_CBC:
+			ixp->ixp_cipher_alg = cri->cri_alg;
+			ixp->ixp_ctx.cipherCtx.cipherAlgo = IX_CRYPTO_ACC_CIPHER_AES;
+			ixp->ixp_ctx.cipherCtx.cipherMode = IX_CRYPTO_ACC_MODE_CBC;
+			ixp->ixp_ctx.cipherCtx.cipherKeyLen = (cri->cri_klen + 7) / 8;
+			ixp->ixp_ctx.cipherCtx.cipherBlockLen = 16;
+			ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen = 16;
+			memcpy(ixp->ixp_ctx.cipherCtx.key.cipherKey,
+					cri->cri_key, (cri->cri_klen + 7) / 8);
+			break;
+
+		case CRYPTO_MD5:
+		case CRYPTO_MD5_HMAC:
+			ixp->ixp_auth_alg = cri->cri_alg;
+			ixp->ixp_ctx.authCtx.authAlgo = IX_CRYPTO_ACC_AUTH_MD5;
+			ixp->ixp_ctx.authCtx.authDigestLen = AUTH_LEN(cri, MD5_HASH_LEN);
+			ixp->ixp_ctx.authCtx.aadLen = 0;
+			/* Only MD5_HMAC needs a key */
+			if (cri->cri_alg == CRYPTO_MD5_HMAC) {
+				ixp->ixp_ctx.authCtx.authKeyLen = (cri->cri_klen + 7) / 8;
+				if (ixp->ixp_ctx.authCtx.authKeyLen >
+						sizeof(ixp->ixp_ctx.authCtx.key.authKey)) {
+					printk(
+						"ixp4xx: Invalid key length for MD5_HMAC - %d bits\n",
+							cri->cri_klen);
+					ixp_freesession(NULL, i);
+					return EINVAL;
+				}
+				memcpy(ixp->ixp_ctx.authCtx.key.authKey,
+						cri->cri_key, (cri->cri_klen + 7) / 8);
+			}
+			break;
+
+		case CRYPTO_SHA1:
+		case CRYPTO_SHA1_HMAC:
+			ixp->ixp_auth_alg = cri->cri_alg;
+			ixp->ixp_ctx.authCtx.authAlgo = IX_CRYPTO_ACC_AUTH_SHA1;
+			ixp->ixp_ctx.authCtx.authDigestLen = AUTH_LEN(cri, SHA1_HASH_LEN);
+			ixp->ixp_ctx.authCtx.aadLen = 0;
+			/* Only SHA1_HMAC needs a key */
+			if (cri->cri_alg == CRYPTO_SHA1_HMAC) {
+				ixp->ixp_ctx.authCtx.authKeyLen = (cri->cri_klen + 7) / 8;
+				if (ixp->ixp_ctx.authCtx.authKeyLen >
+						sizeof(ixp->ixp_ctx.authCtx.key.authKey)) {
+					printk(
+						"ixp4xx: Invalid key length for SHA1_HMAC - %d bits\n",
+							cri->cri_klen);
+					ixp_freesession(NULL, i);
+					return EINVAL;
+				}
+				memcpy(ixp->ixp_ctx.authCtx.key.authKey,
+						cri->cri_key, (cri->cri_klen + 7) / 8);
+			}
+			break;
+
+		default:
+			printk("ixp: unknown algo 0x%x\n", cri->cri_alg);
+			ixp_freesession(NULL, i);
+			return EINVAL;
+		}
+		cri = cri->cri_next;
+	}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+	INIT_WORK(&ixp->ixp_pending_work, ixp_process_pending_wq);
+	INIT_WORK(&ixp->ixp_registration_work, ixp_registration_wq);
+#else
+	INIT_WORK(&ixp->ixp_pending_work, ixp_process_pending, ixp);
+	INIT_WORK(&ixp->ixp_registration_work, ixp_registration, ixp);
+#endif
+
+	return 0;
+}
+
+
+/*
+ * Free a session.
+ */
+static int
+ixp_freesession(device_t dev, u_int64_t tid)
+{
+	u_int32_t sid = CRYPTO_SESID2LID(tid);
+
+	dprintk("%s()\n", __FUNCTION__);
+	if (sid > ixp_sesnum || ixp_sessions == NULL ||
+			ixp_sessions[sid] == NULL) {
+		dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		return EINVAL;
+	}
+
+	/* Silently accept and return */
+	if (sid == 0)
+		return 0;
+
+	if (ixp_sessions[sid]) {
+		if (ixp_sessions[sid]->ixp_ctx_id != -1) {
+			ixCryptoAccCtxUnregister(ixp_sessions[sid]->ixp_ctx_id);
+			ixp_sessions[sid]->ixp_ctx_id = -1;
+		}
+		kfree(ixp_sessions[sid]);
+	}
+	ixp_sessions[sid] = NULL;
+	if (ixp_blocked) {
+		ixp_blocked = 0;
+		crypto_unblock(ixp_id, CRYPTO_SYMQ);
+	}
+	return 0;
+}
+
+
+/*
+ * callback for when hash processing is complete
+ */
+
+static void
+ixp_hash_perform_cb(
+	UINT32 hash_key_id,
+	IX_MBUF *bufp,
+	IxCryptoAccStatus status)
+{
+	struct ixp_q *q;
+
+	dprintk("%s(%u, %p, 0x%x)\n", __FUNCTION__, hash_key_id, bufp, status);
+
+	if (bufp == NULL) {
+		printk("ixp: NULL buf in %s\n", __FUNCTION__);
+		return;
+	}
+
+	q = IX_MBUF_PRIV(bufp);
+	if (q == NULL) {
+		printk("ixp: NULL priv in %s\n", __FUNCTION__);
+		return;
+	}
+
+	if (status == IX_CRYPTO_ACC_STATUS_SUCCESS) {
+		/* On success, need to copy hash back into original client buffer */
+		memcpy(q->ixp_hash_dest, q->ixp_hash_src,
+				(q->ixp_q_data->ixp_auth_alg == CRYPTO_SHA1) ?
+					SHA1_HASH_LEN : MD5_HASH_LEN);
+	}
+	else {
+		printk("ixp: hash perform failed status=%d\n", status);
+		q->ixp_q_crp->crp_etype = EINVAL;
+	}
+
+	/* Free internal buffer used for hashing */
+	kfree(IX_MBUF_MDATA(&q->ixp_q_mbuf));
+
+	crypto_done(q->ixp_q_crp);
+	kmem_cache_free(qcache, q);
+}
+
+/*
+ * setup a request and perform it
+ */
+static void
+ixp_q_process(struct ixp_q *q)
+{
+	IxCryptoAccStatus status;
+	struct ixp_data *ixp = q->ixp_q_data;
+	int auth_off = 0;
+	int auth_len = 0;
+	int crypt_off = 0;
+	int crypt_len = 0;
+	int icv_off = 0;
+	char *crypt_func;
+
+	dprintk("%s(%p)\n", __FUNCTION__, q);
+
+	if (q->ixp_q_ccrd) {
+		if (q->ixp_q_ccrd->crd_flags & CRD_F_IV_EXPLICIT) {
+			q->ixp_q_iv = q->ixp_q_ccrd->crd_iv;
+		} else {
+			q->ixp_q_iv = q->ixp_q_iv_data;
+			crypto_copydata(q->ixp_q_crp->crp_flags, q->ixp_q_crp->crp_buf,
+					q->ixp_q_ccrd->crd_inject,
+					ixp->ixp_ctx.cipherCtx.cipherInitialVectorLen,
+					(caddr_t) q->ixp_q_iv);
+		}
+
+		if (q->ixp_q_acrd) {
+			auth_off = q->ixp_q_acrd->crd_skip;
+			auth_len = q->ixp_q_acrd->crd_len;
+			icv_off  = q->ixp_q_acrd->crd_inject;
+		}
+
+		crypt_off = q->ixp_q_ccrd->crd_skip;
+		crypt_len = q->ixp_q_ccrd->crd_len;
+	} else { /* if (q->ixp_q_acrd) */
+		auth_off = q->ixp_q_acrd->crd_skip;
+		auth_len = q->ixp_q_acrd->crd_len;
+		icv_off  = q->ixp_q_acrd->crd_inject;
+	}
+
+	if (q->ixp_q_crp->crp_flags & CRYPTO_F_SKBUF) {
+		struct sk_buff *skb = (struct sk_buff *) q->ixp_q_crp->crp_buf;
+		if (skb_shinfo(skb)->nr_frags) {
+			/*
+			 * DAVIDM fix this limitation one day by using
+			 * a buffer pool and chaining,  it is not currently
+			 * needed for current user/kernel space acceleration
+			 */
+			printk("ixp: Cannot handle fragmented skb's yet !\n");
+			q->ixp_q_crp->crp_etype = ENOENT;
+			goto done;
+		}
+		IX_MBUF_MLEN(&q->ixp_q_mbuf) =
+				IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) =  skb->len;
+		IX_MBUF_MDATA(&q->ixp_q_mbuf) = skb->data;
+	} else if (q->ixp_q_crp->crp_flags & CRYPTO_F_IOV) {
+		struct uio *uiop = (struct uio *) q->ixp_q_crp->crp_buf;
+		if (uiop->uio_iovcnt != 1) {
+			/*
+			 * DAVIDM fix this limitation one day by using
+			 * a buffer pool and chaining,  it is not currently
+			 * needed for current user/kernel space acceleration
+			 */
+			printk("ixp: Cannot handle more than 1 iovec yet !\n");
+			q->ixp_q_crp->crp_etype = ENOENT;
+			goto done;
+		}
+		IX_MBUF_MLEN(&q->ixp_q_mbuf) =
+				IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) = uiop->uio_iov[0].iov_len;
+		IX_MBUF_MDATA(&q->ixp_q_mbuf) = uiop->uio_iov[0].iov_base;
+	} else /* contig buffer */ {
+		IX_MBUF_MLEN(&q->ixp_q_mbuf)  =
+				IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) = q->ixp_q_crp->crp_ilen;
+		IX_MBUF_MDATA(&q->ixp_q_mbuf) = q->ixp_q_crp->crp_buf;
+	}
+
+	IX_MBUF_PRIV(&q->ixp_q_mbuf) = q;
+
+	if (ixp->ixp_auth_alg == CRYPTO_SHA1 || ixp->ixp_auth_alg == CRYPTO_MD5) {
+		/*
+		 * For SHA1 and MD5 hash, need to create an internal buffer that is big
+		 * enough to hold the original data + the appropriate padding for the
+		 * hash algorithm.
+		 */
+		UINT8 *tbuf = NULL;
+
+		IX_MBUF_MLEN(&q->ixp_q_mbuf) = IX_MBUF_PKT_LEN(&q->ixp_q_mbuf) =
+			((IX_MBUF_MLEN(&q->ixp_q_mbuf) * 8) + 72 + 511) / 8;
+		tbuf = kmalloc(IX_MBUF_MLEN(&q->ixp_q_mbuf), SLAB_ATOMIC);
+		
+		if (IX_MBUF_MDATA(&q->ixp_q_mbuf) == NULL) {
+			printk("ixp: kmalloc(%u, SLAB_ATOMIC) failed\n",
+					IX_MBUF_MLEN(&q->ixp_q_mbuf));
+			q->ixp_q_crp->crp_etype = ENOMEM;
+			goto done;
+		}
+		memcpy(tbuf, &(IX_MBUF_MDATA(&q->ixp_q_mbuf))[auth_off], auth_len);
+
+		/* Set location in client buffer to copy hash into */
+		q->ixp_hash_dest =
+			&(IX_MBUF_MDATA(&q->ixp_q_mbuf))[auth_off + auth_len];
+
+		IX_MBUF_MDATA(&q->ixp_q_mbuf) = tbuf;
+
+		/* Set location in internal buffer for where hash starts */
+		q->ixp_hash_src = &(IX_MBUF_MDATA(&q->ixp_q_mbuf))[auth_len];
+
+		crypt_func = "ixCryptoAccHashPerform";
+		status = ixCryptoAccHashPerform(ixp->ixp_ctx.authCtx.authAlgo,
+				&q->ixp_q_mbuf, ixp_hash_perform_cb, 0, auth_len, auth_len,
+				&ixp->ixp_hash_key_id);
+	}
+	else {
+		crypt_func = "ixCryptoAccAuthCryptPerform";
+		status = ixCryptoAccAuthCryptPerform(ixp->ixp_ctx_id, &q->ixp_q_mbuf,
+			NULL, auth_off, auth_len, crypt_off, crypt_len, icv_off,
+			q->ixp_q_iv);
+	}
+
+	if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
+		return;
+
+	if (IX_CRYPTO_ACC_STATUS_QUEUE_FULL == status) {
+		q->ixp_q_crp->crp_etype = ENOMEM;
+		goto done;
+	}
+
+	printk("ixp: %s failed %u\n", crypt_func, status);
+	q->ixp_q_crp->crp_etype = EINVAL;
+
+done:
+	crypto_done(q->ixp_q_crp);
+	kmem_cache_free(qcache, q);
+}
+
+
+/*
+ * because we cannot process the Q from the Register callback
+ * we do it here on a task Q.
+ */
+
+static void
+ixp_process_pending(void *arg)
+{
+	struct ixp_data *ixp = arg;
+	struct ixp_q *q = NULL;
+
+	dprintk("%s(%p)\n", __FUNCTION__, arg);
+
+	if (!ixp)
+		return;
+
+	while (!list_empty(&ixp->ixp_q)) {
+		q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
+		list_del(&q->ixp_q_list);
+		ixp_q_process(q);
+	}
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+static void
+ixp_process_pending_wq(struct work_struct *work)
+{
+	struct ixp_data *ixp = container_of(work, struct ixp_data, ixp_pending_work);
+	ixp_process_pending(ixp);
+}
+#endif
+
+/*
+ * callback for when context registration is complete
+ */
+
+static void
+ixp_register_cb(UINT32 ctx_id, IX_MBUF *bufp, IxCryptoAccStatus status)
+{
+	int i;
+	struct ixp_data *ixp;
+	struct ixp_q *q;
+
+	dprintk("%s(%d, %p, %d)\n", __FUNCTION__, ctx_id, bufp, status);
+
+	/*
+	 * free any buffer passed in to this routine
+	 */
+	if (bufp) {
+		IX_MBUF_MLEN(bufp) = IX_MBUF_PKT_LEN(bufp) = 0;
+		kfree(IX_MBUF_MDATA(bufp));
+		IX_MBUF_MDATA(bufp) = NULL;
+	}
+
+	for (i = 0; i < ixp_sesnum; i++) {
+		ixp = ixp_sessions[i];
+		if (ixp && ixp->ixp_ctx_id == ctx_id)
+			break;
+	}
+	if (i >= ixp_sesnum) {
+		printk("ixp: invalid context id %d\n", ctx_id);
+		return;
+	}
+
+	if (IX_CRYPTO_ACC_STATUS_WAIT == status) {
+		/* this is normal to free the first of two buffers */
+		dprintk("ixp: register not finished yet.\n");
+		return;
+	}
+
+	if (IX_CRYPTO_ACC_STATUS_SUCCESS != status) {
+		printk("ixp: register failed 0x%x\n", status);
+		while (!list_empty(&ixp->ixp_q)) {
+			q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
+			list_del(&q->ixp_q_list);
+			q->ixp_q_crp->crp_etype = EINVAL;
+			crypto_done(q->ixp_q_crp);
+			kmem_cache_free(qcache, q);
+		}
+		return;
+	}
+
+	/*
+	 * we are now registered,  we cannot start processing the Q here
+	 * or we get strange errors with AES (DES/3DES seem to be ok).
+	 */
+	ixp->ixp_registered = 1;
+	schedule_work(&ixp->ixp_pending_work);
+}
+
+
+/*
+ * callback for when data processing is complete
+ */
+
+static void
+ixp_perform_cb(
+	UINT32 ctx_id,
+	IX_MBUF *sbufp,
+	IX_MBUF *dbufp,
+	IxCryptoAccStatus status)
+{
+	struct ixp_q *q;
+
+	dprintk("%s(%d, %p, %p, 0x%x)\n", __FUNCTION__, ctx_id, sbufp,
+			dbufp, status);
+
+	if (sbufp == NULL) {
+		printk("ixp: NULL sbuf in ixp_perform_cb\n");
+		return;
+	}
+
+	q = IX_MBUF_PRIV(sbufp);
+	if (q == NULL) {
+		printk("ixp: NULL priv in ixp_perform_cb\n");
+		return;
+	}
+
+	if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
+		printk("ixp: perform failed status=%d\n", status);
+		q->ixp_q_crp->crp_etype = EINVAL;
+	}
+
+	crypto_done(q->ixp_q_crp);
+	kmem_cache_free(qcache, q);
+}
+
+
+/*
+ * registration is not callable at IRQ time,  so we defer
+ * to a task queue,  this routines completes the registration for us
+ * when the task queue runs
+ *
+ * Unfortunately this means we cannot tell OCF that the driver is blocked,
+ * we do that on the next request.
+ */
+
+static void
+ixp_registration(void *arg)
+{
+	struct ixp_data *ixp = arg;
+	struct ixp_q *q = NULL;
+	IX_MBUF *pri = NULL, *sec = NULL;
+	int status = IX_CRYPTO_ACC_STATUS_SUCCESS;
+
+	if (!ixp) {
+		printk("ixp: ixp_registration with no arg\n");
+		return;
+	}
+
+	if (ixp->ixp_ctx_id != -1) {
+		ixCryptoAccCtxUnregister(ixp->ixp_ctx_id);
+		ixp->ixp_ctx_id = -1;
+	}
+
+	if (list_empty(&ixp->ixp_q)) {
+		printk("ixp: ixp_registration with no Q\n");
+		return;
+	}
+
+	/*
+	 * setup the primary and secondary buffers
+	 */
+	q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
+	if (q->ixp_q_acrd) {
+		pri = &ixp->ixp_pri_mbuf;
+		sec = &ixp->ixp_sec_mbuf;
+		IX_MBUF_MLEN(pri)  = IX_MBUF_PKT_LEN(pri) = 128;
+		IX_MBUF_MDATA(pri) = (unsigned char *) kmalloc(128, SLAB_ATOMIC);
+		IX_MBUF_MLEN(sec)  = IX_MBUF_PKT_LEN(sec) = 128;
+		IX_MBUF_MDATA(sec) = (unsigned char *) kmalloc(128, SLAB_ATOMIC);
+	}
+
+	/* Only need to register if a crypt op or HMAC op */
+	if (!(ixp->ixp_auth_alg == CRYPTO_SHA1 ||
+				ixp->ixp_auth_alg == CRYPTO_MD5)) {
+		status = ixCryptoAccCtxRegister(
+					&ixp->ixp_ctx,
+					pri, sec,
+					ixp_register_cb,
+					ixp_perform_cb,
+					&ixp->ixp_ctx_id);
+	}
+	else {
+		/* Otherwise we start processing pending q */
+		schedule_work(&ixp->ixp_pending_work);
+	}
+
+	if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
+		return;
+
+	if (IX_CRYPTO_ACC_STATUS_EXCEED_MAX_TUNNELS == status) {
+		printk("ixp: ixCryptoAccCtxRegister failed (out of tunnels)\n");
+		ixp_blocked = 1;
+		/* perhaps we should return EGAIN on queued ops ? */
+		return;
+	}
+
+	printk("ixp: ixCryptoAccCtxRegister failed %d\n", status);
+	ixp->ixp_ctx_id = -1;
+
+	/*
+	 * everything waiting is toasted
+	 */
+	while (!list_empty(&ixp->ixp_q)) {
+		q = list_entry(ixp->ixp_q.next, struct ixp_q, ixp_q_list);
+		list_del(&q->ixp_q_list);
+		q->ixp_q_crp->crp_etype = ENOENT;
+		crypto_done(q->ixp_q_crp);
+		kmem_cache_free(qcache, q);
+	}
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+static void
+ixp_registration_wq(struct work_struct *work)
+{
+	struct ixp_data *ixp = container_of(work, struct ixp_data,
+								ixp_registration_work);
+	ixp_registration(ixp);
+}
+#endif
+
+/*
+ * Process a request.
+ */
+static int
+ixp_process(device_t dev, struct cryptop *crp, int hint)
+{
+	struct ixp_data *ixp;
+	unsigned int lid;
+	struct ixp_q *q = NULL;
+	int status;
+
+	dprintk("%s()\n", __FUNCTION__);
+
+	/* Sanity check */
+	if (crp == NULL) {
+		dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		return EINVAL;
+	}
+
+	crp->crp_etype = 0;
+
+	if (ixp_blocked)
+		return ERESTART;
+
+	if (crp->crp_desc == NULL || crp->crp_buf == NULL) {
+		dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		crp->crp_etype = EINVAL;
+		goto done;
+	}
+
+	/*
+	 * find the session we are using
+	 */
+
+	lid = crp->crp_sid & 0xffffffff;
+	if (lid >= ixp_sesnum || lid == 0 || ixp_sessions == NULL ||
+			ixp_sessions[lid] == NULL) {
+		crp->crp_etype = ENOENT;
+		dprintk("%s,%d: ENOENT\n", __FILE__, __LINE__);
+		goto done;
+	}
+	ixp = ixp_sessions[lid];
+
+	/*
+	 * setup a new request ready for queuing
+	 */
+	q = kmem_cache_alloc(qcache, SLAB_ATOMIC);
+	if (q == NULL) {
+		dprintk("%s,%d: ENOMEM\n", __FILE__, __LINE__);
+		crp->crp_etype = ENOMEM;
+		goto done;
+	}
+	/*
+	 * save some cycles by only zeroing the important bits
+	 */
+	memset(&q->ixp_q_mbuf, 0, sizeof(q->ixp_q_mbuf));
+	q->ixp_q_ccrd = NULL;
+	q->ixp_q_acrd = NULL;
+	q->ixp_q_crp = crp;
+	q->ixp_q_data = ixp;
+
+	/*
+	 * point the cipher and auth descriptors appropriately
+	 * check that we have something to do
+	 */
+	if (crp->crp_desc->crd_alg == ixp->ixp_cipher_alg)
+		q->ixp_q_ccrd = crp->crp_desc;
+	else if (crp->crp_desc->crd_alg == ixp->ixp_auth_alg)
+		q->ixp_q_acrd = crp->crp_desc;
+	else {
+		crp->crp_etype = ENOENT;
+		dprintk("%s,%d: bad desc match: ENOENT\n", __FILE__, __LINE__);
+		goto done;
+	}
+	if (crp->crp_desc->crd_next) {
+		if (crp->crp_desc->crd_next->crd_alg == ixp->ixp_cipher_alg)
+			q->ixp_q_ccrd = crp->crp_desc->crd_next;
+		else if (crp->crp_desc->crd_next->crd_alg == ixp->ixp_auth_alg)
+			q->ixp_q_acrd = crp->crp_desc->crd_next;
+		else {
+			crp->crp_etype = ENOENT;
+			dprintk("%s,%d: bad desc match: ENOENT\n", __FILE__, __LINE__);
+			goto done;
+		}
+	}
+
+	/*
+	 * If there is a direction change for this context then we mark it as
+	 * unregistered and re-register is for the new direction.  This is not
+	 * a very expensive operation and currently only tends to happen when
+	 * user-space application are doing benchmarks
+	 *
+	 * DM - we should be checking for pending requests before unregistering.
+	 */
+	if (q->ixp_q_ccrd && ixp->ixp_registered &&
+			ixp->ixp_crd_flags != (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT)) {
+		dprintk("%s - detected direction change on session\n", __FUNCTION__);
+		ixp->ixp_registered = 0;
+	}
+
+	/*
+	 * if we are registered,  call straight into the perform code
+	 */
+	if (ixp->ixp_registered) {
+		ixp_q_process(q);
+		return 0;
+	}
+
+	/*
+	 * the only part of the context not set in newsession is the direction
+	 * dependent parts
+	 */
+	if (q->ixp_q_ccrd) {
+		ixp->ixp_crd_flags = (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT);
+		if (q->ixp_q_ccrd->crd_flags & CRD_F_ENCRYPT) {
+			ixp->ixp_ctx.operation = q->ixp_q_acrd ?
+					IX_CRYPTO_ACC_OP_ENCRYPT_AUTH : IX_CRYPTO_ACC_OP_ENCRYPT;
+		} else {
+			ixp->ixp_ctx.operation = q->ixp_q_acrd ?
+					IX_CRYPTO_ACC_OP_AUTH_DECRYPT : IX_CRYPTO_ACC_OP_DECRYPT;
+		}
+	} else {
+		/* q->ixp_q_acrd must be set if we are here */
+		ixp->ixp_ctx.operation = IX_CRYPTO_ACC_OP_AUTH_CALC;
+	}
+
+	status = list_empty(&ixp->ixp_q);
+	list_add_tail(&q->ixp_q_list, &ixp->ixp_q);
+	if (status)
+		schedule_work(&ixp->ixp_registration_work);
+	return 0;
+
+done:
+	if (q)
+		kmem_cache_free(qcache, q);
+	crypto_done(crp);
+	return 0;
+}
+
+
+#ifdef __ixp46X
+/*
+ * key processing support for the ixp465
+ */
+
+
+/*
+ * copy a BN (LE) into a buffer (BE) an fill out the op appropriately
+ * assume zeroed and only copy bits that are significant
+ */
+
+static int
+ixp_copy_ibuf(struct crparam *p, IxCryptoAccPkeEauOperand *op, UINT32 *buf)
+{
+	unsigned char *src = (unsigned char *) p->crp_p;
+	unsigned char *dst;
+	int len, bits = p->crp_nbits;
+
+	dprintk("%s()\n", __FUNCTION__);
+
+	if (bits > MAX_IOP_SIZE * sizeof(UINT32) * 8) {
+		dprintk("%s - ibuf too big (%d > %d)\n", __FUNCTION__,
+				bits, MAX_IOP_SIZE * sizeof(UINT32) * 8);
+		return -1;
+	}
+
+	len = (bits + 31) / 32; /* the number UINT32's needed */
+
+	dst = (unsigned char *) &buf[len];
+	dst--;
+
+	while (bits > 0) {
+		*dst-- = *src++;
+		bits -= 8;
+	}
+
+#if 0 /* no need to zero remaining bits as it is done during request alloc */
+	while (dst > (unsigned char *) buf)
+		*dst-- = '\0';
+#endif
+
+	op->pData = buf;
+	op->dataLen = len;
+	return 0;
+}
+
+/*
+ * copy out the result,  be as forgiving as we can about small output buffers
+ */
+
+static int
+ixp_copy_obuf(struct crparam *p, IxCryptoAccPkeEauOpResult *op, UINT32 *buf)
+{
+	unsigned char *dst = (unsigned char *) p->crp_p;
+	unsigned char *src = (unsigned char *) buf;
+	int len, z, bits = p->crp_nbits;
+
+	dprintk("%s()\n", __FUNCTION__);
+
+	len = op->dataLen * sizeof(UINT32);
+
+	/* skip leading zeroes to be small buffer friendly */
+	z = 0;
+	while (z < len && src[z] == '\0')
+		z++;
+
+	src += len;
+	src--;
+	len -= z;
+
+	while (len > 0 && bits > 0) {
+		*dst++ = *src--;
+		len--;
+		bits -= 8;
+	}
+
+	while (bits > 0) {
+		*dst++ = '\0';
+		bits -= 8;
+	}
+
+	if (len > 0) {
+		dprintk("%s - obuf is %d (z=%d, ob=%d) bytes too small\n",
+				__FUNCTION__, len, z, p->crp_nbits / 8);
+		return -1;
+	}
+
+	return 0;
+}
+
+
+/*
+ * the parameter offsets for exp_mod
+ */
+
+#define IXP_PARAM_BASE 0
+#define IXP_PARAM_EXP  1
+#define IXP_PARAM_MOD  2
+#define IXP_PARAM_RES  3
+
+/*
+ * key processing complete callback,  is also used to start processing
+ * by passing a NULL for pResult
+ */
+
+static void
+ixp_kperform_cb(
+	IxCryptoAccPkeEauOperation operation,
+	IxCryptoAccPkeEauOpResult *pResult,
+	BOOL carryOrBorrow,
+	IxCryptoAccStatus status)
+{
+	struct ixp_pkq *q, *tmp;
+	unsigned long flags;
+
+	dprintk("%s(0x%x, %p, %d, 0x%x)\n", __FUNCTION__, operation, pResult,
+			carryOrBorrow, status);
+
+	/* handle a completed request */
+	if (pResult) {
+		if (ixp_pk_cur && &ixp_pk_cur->pkq_result == pResult) {
+			q = ixp_pk_cur;
+			if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
+				dprintk("%s() - op failed 0x%x\n", __FUNCTION__, status);
+				q->pkq_krp->krp_status = ERANGE; /* could do better */
+			} else {
+				/* copy out the result */
+				if (ixp_copy_obuf(&q->pkq_krp->krp_param[IXP_PARAM_RES],
+						&q->pkq_result, q->pkq_obuf))
+					q->pkq_krp->krp_status = ERANGE;
+			}
+			crypto_kdone(q->pkq_krp);
+			kfree(q);
+			ixp_pk_cur = NULL;
+		} else
+			printk("%s - callback with invalid result pointer\n", __FUNCTION__);
+	}
+
+	spin_lock_irqsave(&ixp_pkq_lock, flags);
+	if (ixp_pk_cur || list_empty(&ixp_pkq)) {
+		spin_unlock_irqrestore(&ixp_pkq_lock, flags);
+		return;
+	}
+
+	list_for_each_entry_safe(q, tmp, &ixp_pkq, pkq_list) {
+
+		list_del(&q->pkq_list);
+		ixp_pk_cur = q;
+
+		spin_unlock_irqrestore(&ixp_pkq_lock, flags);
+
+		status = ixCryptoAccPkeEauPerform(
+				IX_CRYPTO_ACC_OP_EAU_MOD_EXP,
+				&q->pkq_op,
+				ixp_kperform_cb,
+				&q->pkq_result);
+	
+		if (status == IX_CRYPTO_ACC_STATUS_SUCCESS) {
+			dprintk("%s() - ixCryptoAccPkeEauPerform SUCCESS\n", __FUNCTION__);
+			return; /* callback will return here for callback */
+		} else if (status == IX_CRYPTO_ACC_STATUS_RETRY) {
+			printk("%s() - ixCryptoAccPkeEauPerform RETRY\n", __FUNCTION__);
+		} else {
+			printk("%s() - ixCryptoAccPkeEauPerform failed %d\n",
+					__FUNCTION__, status);
+		}
+		q->pkq_krp->krp_status = ERANGE; /* could do better */
+		crypto_kdone(q->pkq_krp);
+		kfree(q);
+		spin_lock_irqsave(&ixp_pkq_lock, flags);
+	}
+	spin_unlock_irqrestore(&ixp_pkq_lock, flags);
+}
+
+
+static int
+ixp_kprocess(device_t dev, struct cryptkop *krp, int hint)
+{
+	struct ixp_pkq *q;
+	int rc = 0;
+	unsigned long flags;
+
+	dprintk("%s l1=%d l2=%d l3=%d l4=%d\n", __FUNCTION__,
+			krp->krp_param[IXP_PARAM_BASE].crp_nbits,
+			krp->krp_param[IXP_PARAM_EXP].crp_nbits,
+			krp->krp_param[IXP_PARAM_MOD].crp_nbits,
+			krp->krp_param[IXP_PARAM_RES].crp_nbits);
+
+
+	if (krp->krp_op != CRK_MOD_EXP) {
+		krp->krp_status = EOPNOTSUPP;
+		goto err;
+	}
+
+	q = (struct ixp_pkq *) kmalloc(sizeof(*q), GFP_KERNEL);
+	if (q == NULL) {
+		krp->krp_status = ENOMEM;
+		goto err;
+	}
+
+	/*
+	 * The PKE engine does not appear to zero the output buffer
+	 * appropriately, so we need to do it all here.
+	 */
+	memset(q, 0, sizeof(*q));
+
+	q->pkq_krp = krp;
+	INIT_LIST_HEAD(&q->pkq_list);
+
+	if (ixp_copy_ibuf(&krp->krp_param[IXP_PARAM_BASE], &q->pkq_op.modExpOpr.M,
+			q->pkq_ibuf0))
+		rc = 1;
+	if (!rc && ixp_copy_ibuf(&krp->krp_param[IXP_PARAM_EXP],
+				&q->pkq_op.modExpOpr.e, q->pkq_ibuf1))
+		rc = 2;
+	if (!rc && ixp_copy_ibuf(&krp->krp_param[IXP_PARAM_MOD],
+				&q->pkq_op.modExpOpr.N, q->pkq_ibuf2))
+		rc = 3;
+
+	if (rc) {
+		kfree(q);
+		krp->krp_status = ERANGE;
+		goto err;
+	}
+
+	q->pkq_result.pData           = q->pkq_obuf;
+	q->pkq_result.dataLen         =
+			(krp->krp_param[IXP_PARAM_RES].crp_nbits + 31) / 32;
+
+	spin_lock_irqsave(&ixp_pkq_lock, flags);
+	list_add_tail(&q->pkq_list, &ixp_pkq);
+	spin_unlock_irqrestore(&ixp_pkq_lock, flags);
+
+	if (!ixp_pk_cur)
+		ixp_kperform_cb(0, NULL, 0, 0);
+	return (0);
+
+err:
+	crypto_kdone(krp);
+	return (0);
+}
+
+
+
+#ifdef CONFIG_OCF_RANDOMHARVEST
+/*
+ * We run the random number generator output through SHA so that it
+ * is FIPS compliant.
+ */
+
+static volatile int sha_done = 0;
+static unsigned char sha_digest[20];
+
+static void
+ixp_hash_cb(UINT8 *digest, IxCryptoAccStatus status)
+{
+	dprintk("%s(%p, %d)\n", __FUNCTION__, digest, status);
+	if (sha_digest != digest)
+		printk("digest error\n");
+	if (IX_CRYPTO_ACC_STATUS_SUCCESS == status)
+		sha_done = 1;
+	else
+		sha_done = -status;
+}
+
+static int
+ixp_read_random(void *arg, u_int32_t *buf, int maxwords)
+{
+	IxCryptoAccStatus status;
+	int i, n, rc;
+
+	dprintk("%s(%p, %d)\n", __FUNCTION__, buf, maxwords);
+	memset(buf, 0, maxwords * sizeof(*buf));
+	status = ixCryptoAccPkePseudoRandomNumberGet(maxwords, buf);
+	if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
+		dprintk("%s: ixCryptoAccPkePseudoRandomNumberGet failed %d\n",
+				__FUNCTION__, status);
+		return 0;
+	}
+
+	/*
+	 * run the random data through SHA to make it look more random
+	 */
+
+	n = sizeof(sha_digest); /* process digest bytes at a time */
+
+	rc = 0;
+	for (i = 0; i < maxwords; i += n / sizeof(*buf)) {
+		if ((maxwords - i) * sizeof(*buf) < n)
+			n = (maxwords - i) * sizeof(*buf);
+		sha_done = 0;
+		status = ixCryptoAccPkeHashPerform(IX_CRYPTO_ACC_AUTH_SHA1,
+				(UINT8 *) &buf[i], n, ixp_hash_cb, sha_digest);
+		if (status != IX_CRYPTO_ACC_STATUS_SUCCESS) {
+			dprintk("ixCryptoAccPkeHashPerform failed %d\n", status);
+			return -EIO;
+		}
+		while (!sha_done)
+			schedule();
+		if (sha_done < 0) {
+			dprintk("ixCryptoAccPkeHashPerform failed CB %d\n", -sha_done);
+			return 0;
+		}
+		memcpy(&buf[i], sha_digest, n);
+		rc += n / sizeof(*buf);;
+	}
+
+	return rc;
+}
+#endif /* CONFIG_OCF_RANDOMHARVEST */
+
+#endif /* __ixp46X */
+
+
+
+/*
+ * our driver startup and shutdown routines
+ */
+
+static int
+ixp_init(void)
+{
+	dprintk("%s(%p)\n", __FUNCTION__, ixp_init);
+
+	if (ixp_init_crypto && ixCryptoAccInit() != IX_CRYPTO_ACC_STATUS_SUCCESS)
+		printk("ixCryptoAccInit failed, assuming already initialised!\n");
+
+	qcache = kmem_cache_create("ixp4xx_q", sizeof(struct ixp_q), 0,
+				SLAB_HWCACHE_ALIGN, NULL
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
+				, NULL
+#endif
+				  );
+	if (!qcache) {
+		printk("failed to create Qcache\n");
+		return -ENOENT;
+	}
+
+	memset(&ixpdev, 0, sizeof(ixpdev));
+	softc_device_init(&ixpdev, "ixp4xx", 0, ixp_methods);
+
+	ixp_id = crypto_get_driverid(softc_get_device(&ixpdev),
+				CRYPTOCAP_F_HARDWARE);
+	if (ixp_id < 0)
+		panic("IXP/OCF crypto device cannot initialize!");
+
+#define	REGISTER(alg) \
+	crypto_register(ixp_id,alg,0,0)
+
+	REGISTER(CRYPTO_DES_CBC);
+	REGISTER(CRYPTO_3DES_CBC);
+	REGISTER(CRYPTO_RIJNDAEL128_CBC);
+#ifdef CONFIG_OCF_IXP4XX_SHA1_MD5
+	REGISTER(CRYPTO_MD5);
+	REGISTER(CRYPTO_SHA1);
+#endif
+	REGISTER(CRYPTO_MD5_HMAC);
+	REGISTER(CRYPTO_SHA1_HMAC);
+#undef REGISTER
+
+#ifdef __ixp46X
+	spin_lock_init(&ixp_pkq_lock);
+	/*
+	 * we do not enable the go fast options here as they can potentially
+	 * allow timing based attacks
+	 *
+	 * http://www.openssl.org/news/secadv_20030219.txt
+	 */
+	ixCryptoAccPkeEauExpConfig(0, 0);
+	crypto_kregister(ixp_id, CRK_MOD_EXP, 0);
+#ifdef CONFIG_OCF_RANDOMHARVEST
+	crypto_rregister(ixp_id, ixp_read_random, NULL);
+#endif
+#endif
+
+	return 0;
+}
+
+static void
+ixp_exit(void)
+{
+	dprintk("%s()\n", __FUNCTION__);
+	crypto_unregister_all(ixp_id);
+	ixp_id = -1;
+	kmem_cache_destroy(qcache);
+	qcache = NULL;
+}
+
+module_init(ixp_init);
+module_exit(ixp_exit);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("David McCullough <dmccullough@cyberguard.com>");
+MODULE_DESCRIPTION("ixp (OCF module for IXP4xx crypto)");