branch Attitude Adjustment

git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 841 insertions, 0 deletions

diff --git a/target/linux/generic/files/crypto/ocf/c7108/aes-7108.c b/target/linux/generic/files/crypto/ocf/c7108/aes-7108.c
new file mode 100644
index 000000000..f4841f555
--- /dev/null
+++ b/target/linux/generic/files/crypto/ocf/c7108/aes-7108.c
@@ -0,0 +1,841 @@
+/*
+ * Copyright (C) 2006 Micronas USA
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Effort sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F30602-01-2-0537.
+ *
+ */
+
+//#include <linux/config.h>
+#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/mm.h>
+#include <linux/skbuff.h>
+#include <linux/random.h>
+#include <asm/io.h>
+#include <asm/delay.h>
+//#include <asm/scatterlist.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
+#include <linux/highmem.h>
+#include <cryptodev.h>
+#include <uio.h>
+#include <aes-7108.h>
+
+/* Runtime mode */
+static int c7108_crypto_mode = C7108_AES_CTRL_MODE_CTR;
+//static int c7108_crypto_mode = C7108_AES_CTRL_MODE_CBC;
+
+static int32_t c7108_id = -1;
+static struct cipher_7108 **c7108_sessions = NULL;
+static u_int32_t c7108_sesnum = 0;
+static unsigned long iobar;
+
+/* Crypto entry points */
+static	int c7108_process(void *, struct cryptop *, int);
+static	int c7108_newsession(void *, u_int32_t *, struct cryptoini *);
+static	int c7108_freesession(void *, u_int64_t);
+
+/* Globals */
+static int debug = 0;
+static spinlock_t csr_mutex;
+
+/* Generic controller-based lock */
+#define AES_LOCK()\
+          spin_lock(&csr_mutex)
+#define AES_UNLOCK()\
+          spin_unlock(&csr_mutex)
+
+/* 7108 AES register access */
+#define c7108_reg_wr8(a,d)   iowrite8(d, (void*)(iobar+(a)))
+#define c7108_reg_wr16(a,d)  iowrite16(d, (void*)(iobar+(a)))
+#define c7108_reg_wr32(a,d)  iowrite32(d, (void*)(iobar+(a)))
+#define c7108_reg_rd8(a)     ioread8((void*)(iobar+(a)))
+#define c7108_reg_rd16(a)    ioread16((void*)(iobar+(a)))
+#define c7108_reg_rd32(a)    ioread32((void*)(iobar+(a)))
+
+static int 
+c7108_xlate_key(int klen, u8* k8ptr, u32* k32ptr)
+{
+        int i, nw=0;
+	nw = ((klen >= 256) ? 8 : (klen >= 192) ? 6 : 4);
+	for ( i = 0; i < nw; i++) { 
+	    k32ptr[i] =    (k8ptr[i+3] << 24) | (k8ptr[i+2] << 16) | 
+		           (k8ptr[i+1] << 8)  | k8ptr[i];
+	    
+	}
+	return 0;
+}
+
+static int 
+c7108_cache_key(int klen, u32* k32ptr, u8* k8ptr)
+{
+        int i, nb=0;
+	u8* ptr = (u8*)k32ptr;
+	nb = ((klen >= 256) ? 32 : (klen >= 192) ? 24 : 16);
+	for ( i = 0; i < nb; i++)
+	    k8ptr[i] = ptr[i];
+	return 0;
+}
+
+static int
+c7108_aes_setup_dma(u32 src, u32 dst, u32 len)
+{
+        if (len < 16) {
+	    printk("len < 16\n");
+	    return -10;
+	}
+	if (len % 16) {
+	    printk("len not multiple of 16\n");
+	    return -11;
+	}	
+	c7108_reg_wr16(C7108_AES_DMA_SRC0_LO, (u16) src);
+	c7108_reg_wr16(C7108_AES_DMA_SRC0_HI, (u16)((src & 0xffff0000) >> 16));
+	c7108_reg_wr16(C7108_AES_DMA_DST0_LO, (u16) dst);
+	c7108_reg_wr16(C7108_AES_DMA_DST0_HI, (u16)((dst & 0xffff0000) >> 16));
+	c7108_reg_wr16(C7108_AES_DMA_LEN, (u16) ((len / 16) - 1));
+
+	return 0;
+}
+
+static int
+c7108_aes_set_hw_iv(u8 iv[16])
+{
+        c7108_reg_wr16(C7108_AES_IV0_LO, (u16) ((iv[1] << 8) | iv[0]));
+	c7108_reg_wr16(C7108_AES_IV0_HI, (u16) ((iv[3] << 8) | iv[2]));
+	c7108_reg_wr16(C7108_AES_IV1_LO, (u16) ((iv[5] << 8) | iv[4]));
+	c7108_reg_wr16(C7108_AES_IV1_HI, (u16) ((iv[7] << 8) | iv[6]));
+	c7108_reg_wr16(C7108_AES_IV2_LO, (u16) ((iv[9] << 8) | iv[8]));
+	c7108_reg_wr16(C7108_AES_IV2_HI, (u16) ((iv[11] << 8) | iv[10]));
+	c7108_reg_wr16(C7108_AES_IV3_LO, (u16) ((iv[13] << 8) | iv[12]));
+	c7108_reg_wr16(C7108_AES_IV3_HI, (u16) ((iv[15] << 8) | iv[14]));
+
+    return 0;
+}
+
+static void
+c7108_aes_read_dkey(u32 * dkey)
+{
+        dkey[0] = (c7108_reg_rd16(C7108_AES_EKEY0_HI) << 16) | 
+	           c7108_reg_rd16(C7108_AES_EKEY0_LO);
+	dkey[1] = (c7108_reg_rd16(C7108_AES_EKEY1_HI) << 16) | 
+	           c7108_reg_rd16(C7108_AES_EKEY1_LO);
+	dkey[2] = (c7108_reg_rd16(C7108_AES_EKEY2_HI) << 16) | 
+	           c7108_reg_rd16(C7108_AES_EKEY2_LO);
+	dkey[3] = (c7108_reg_rd16(C7108_AES_EKEY3_HI) << 16) | 
+	           c7108_reg_rd16(C7108_AES_EKEY3_LO);
+	dkey[4] = (c7108_reg_rd16(C7108_AES_EKEY4_HI) << 16) | 
+                   c7108_reg_rd16(C7108_AES_EKEY4_LO);
+	dkey[5] = (c7108_reg_rd16(C7108_AES_EKEY5_HI) << 16) | 
+                   c7108_reg_rd16(C7108_AES_EKEY5_LO);
+	dkey[6] = (c7108_reg_rd16(C7108_AES_EKEY6_HI) << 16) | 
+                   c7108_reg_rd16(C7108_AES_EKEY6_LO);
+	dkey[7] = (c7108_reg_rd16(C7108_AES_EKEY7_HI) << 16) | 
+                   c7108_reg_rd16(C7108_AES_EKEY7_LO);
+}
+
+static int
+c7108_aes_cipher(int op,
+		 u32 dst,
+		 u32 src,
+		 u32 len,
+		 int klen,
+		 u16 mode,
+		 u32 key[8],
+		 u8 iv[16])
+{
+        int rv = 0, cnt=0;
+	u16 ctrl = 0, stat = 0;
+
+	AES_LOCK();
+
+	/* Setup key length */
+	if (klen == 128) {
+	    ctrl |= C7108_AES_KEY_LEN_128;
+	} else if (klen == 192) {
+	    ctrl |= C7108_AES_KEY_LEN_192;
+	} else if (klen == 256) {
+	    ctrl |= C7108_AES_KEY_LEN_256;
+	} else {
+	    AES_UNLOCK();
+	    return -3;
+	}
+	
+	/* Check opcode */
+	if (C7108_AES_ENCRYPT == op) {
+	    ctrl |= C7108_AES_ENCRYPT;
+	} else if (C7108_AES_DECRYPT == op) {
+	    ctrl |= C7108_AES_DECRYPT;
+	} else {
+	    AES_UNLOCK();
+	    return -4;
+	}
+	
+	/* check mode */
+	if ( (mode != C7108_AES_CTRL_MODE_CBC) &&
+	     (mode != C7108_AES_CTRL_MODE_CFB) &&
+	     (mode != C7108_AES_CTRL_MODE_OFB) &&
+	     (mode != C7108_AES_CTRL_MODE_CTR) && 
+	     (mode != C7108_AES_CTRL_MODE_ECB) ) { 
+	    AES_UNLOCK();	    
+	    return -5;
+	}
+	
+	/* Now set mode */
+	ctrl |= mode;
+	
+	/* For CFB, OFB, and CTR, neither backward key
+	 * expansion nor key inversion is required.
+	 */
+	if ( (C7108_AES_DECRYPT == op) &&  
+	     (C7108_AES_CTRL_MODE_CBC == mode ||
+	      C7108_AES_CTRL_MODE_ECB == mode ) ){ 
+
+	    /* Program Key */
+	    c7108_reg_wr16(C7108_AES_KEY0_LO, (u16) key[4]);
+	    c7108_reg_wr16(C7108_AES_KEY0_HI, (u16) (key[4] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY1_LO, (u16) key[5]);
+	    c7108_reg_wr16(C7108_AES_KEY1_HI, (u16) (key[5] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY2_LO, (u16) key[6]);
+	    c7108_reg_wr16(C7108_AES_KEY2_HI, (u16) (key[6] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY3_LO, (u16) key[7]);
+	    c7108_reg_wr16(C7108_AES_KEY3_HI, (u16) (key[7] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY6_LO, (u16) key[2]);
+	    c7108_reg_wr16(C7108_AES_KEY6_HI, (u16) (key[2] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY7_LO, (u16) key[3]);
+	    c7108_reg_wr16(C7108_AES_KEY7_HI, (u16) (key[3] >> 16));
+	    
+	    
+	    if (192 == klen) { 
+		c7108_reg_wr16(C7108_AES_KEY4_LO, (u16) key[7]);
+		c7108_reg_wr16(C7108_AES_KEY4_HI, (u16) (key[7] >> 16));
+		c7108_reg_wr16(C7108_AES_KEY5_LO, (u16) key[7]);
+		c7108_reg_wr16(C7108_AES_KEY5_HI, (u16) (key[7] >> 16));
+		
+	    } else if (256 == klen) {
+		/* 256 */
+		c7108_reg_wr16(C7108_AES_KEY4_LO, (u16) key[0]);
+		c7108_reg_wr16(C7108_AES_KEY4_HI, (u16) (key[0] >> 16));
+		c7108_reg_wr16(C7108_AES_KEY5_LO, (u16) key[1]);
+		c7108_reg_wr16(C7108_AES_KEY5_HI, (u16) (key[1] >> 16));
+		
+	    }
+	    
+	} else { 
+	    /* Program Key */
+	    c7108_reg_wr16(C7108_AES_KEY0_LO, (u16) key[0]);
+	    c7108_reg_wr16(C7108_AES_KEY0_HI, (u16) (key[0] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY1_LO, (u16) key[1]);
+	    c7108_reg_wr16(C7108_AES_KEY1_HI, (u16) (key[1] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY2_LO, (u16) key[2]);
+	    c7108_reg_wr16(C7108_AES_KEY2_HI, (u16) (key[2] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY3_LO, (u16) key[3]);
+	    c7108_reg_wr16(C7108_AES_KEY3_HI, (u16) (key[3] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY4_LO, (u16) key[4]);
+	    c7108_reg_wr16(C7108_AES_KEY4_HI, (u16) (key[4] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY5_LO, (u16) key[5]);
+	    c7108_reg_wr16(C7108_AES_KEY5_HI, (u16) (key[5] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY6_LO, (u16) key[6]);
+	    c7108_reg_wr16(C7108_AES_KEY6_HI, (u16) (key[6] >> 16));
+	    c7108_reg_wr16(C7108_AES_KEY7_LO, (u16) key[7]);
+	    c7108_reg_wr16(C7108_AES_KEY7_HI, (u16) (key[7] >> 16));
+	    
+	}
+	
+	/* Set IV always */
+	c7108_aes_set_hw_iv(iv);
+	
+	/* Program DMA addresses */
+	if ((rv = c7108_aes_setup_dma(src, dst, len)) < 0) { 
+	    AES_UNLOCK();
+	    return rv;
+	}
+
+	
+	/* Start AES cipher */
+	c7108_reg_wr16(C7108_AES_CTRL, ctrl | C7108_AES_GO);
+	
+	//printk("Ctrl: 0x%x\n", ctrl | C7108_AES_GO);
+	do {
+	    /* TODO: interrupt mode */
+	    //        printk("aes_stat=0x%x\n", stat);
+	    //udelay(100);
+	} while ((cnt++ < 1000000) && 
+		 !((stat=c7108_reg_rd16(C7108_AES_CTRL))&C7108_AES_OP_DONE));
+
+
+	if ((mode == C7108_AES_CTRL_MODE_ECB)||
+	    (mode == C7108_AES_CTRL_MODE_CBC)) { 
+	    /* Save out key when the lock is held ... */
+	    c7108_aes_read_dkey(key);
+	}
+	
+	AES_UNLOCK();
+	return 0;
+	
+}
+
+/*
+ * Generate a new crypto device session.
+ */
+static int
+c7108_newsession(void *arg, u_int32_t *sid, struct cryptoini *cri)
+{
+	struct cipher_7108 **swd;
+	u_int32_t i;
+	char *algo;
+	int mode, xfm_type;
+
+	dprintk("%s()\n", __FUNCTION__);
+	if (sid == NULL || cri == NULL) {
+		dprintk("%s,%d - EINVAL\n", __FILE__, __LINE__);
+		return EINVAL;
+	}
+
+	if (c7108_sessions) {
+		for (i = 1; i < c7108_sesnum; i++)
+			if (c7108_sessions[i] == NULL)
+				break;
+	} else
+		i = 1;		/* NB: to silence compiler warning */
+
+	if (c7108_sessions == NULL || i == c7108_sesnum) {
+	    if (c7108_sessions == NULL) {
+		i = 1; /* We leave c7108_sessions[0] empty */
+		c7108_sesnum = CRYPTO_SW_SESSIONS;
+	    } else
+		c7108_sesnum *= 2;
+	    
+	    swd = kmalloc(c7108_sesnum * sizeof(struct cipher_7108 *), 
+			  GFP_ATOMIC);
+	    if (swd == NULL) {
+		/* Reset session number */
+		if (c7108_sesnum == CRYPTO_SW_SESSIONS)
+		    c7108_sesnum = 0;
+		else
+		    c7108_sesnum /= 2;
+		dprintk("%s,%d: ENOBUFS\n", __FILE__, __LINE__);
+		return ENOBUFS;
+	    }
+	    memset(swd, 0, c7108_sesnum * sizeof(struct cipher_7108 *));
+	    
+	    /* Copy existing sessions */
+	    if (c7108_sessions) {
+		memcpy(swd, c7108_sessions,
+		       (c7108_sesnum / 2) * sizeof(struct cipher_7108 *));
+		kfree(c7108_sessions);
+	    }
+	    
+	    c7108_sessions = swd;
+
+	}
+	
+	swd = &c7108_sessions[i];
+	*sid = i;
+
+	while (cri) {
+		*swd = (struct cipher_7108 *) 
+		    kmalloc(sizeof(struct cipher_7108), GFP_ATOMIC);
+		if (*swd == NULL) {
+		    c7108_freesession(NULL, i);
+		    dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		    return ENOBUFS;
+		}
+		memset(*swd, 0, sizeof(struct cipher_7108));
+
+		algo = NULL;
+		mode = 0;
+		xfm_type = HW_TYPE_CIPHER;
+
+		switch (cri->cri_alg) {
+
+		case CRYPTO_AES_CBC:
+			algo = "aes";
+			mode = CRYPTO_TFM_MODE_CBC;
+			c7108_crypto_mode = C7108_AES_CTRL_MODE_CBC;
+			break;
+#if 0
+		case CRYPTO_AES_CTR:
+			algo = "aes_ctr";
+			mode = CRYPTO_TFM_MODE_CBC;
+			c7108_crypto_mode = C7108_AES_CTRL_MODE_CTR;
+			break;
+		case CRYPTO_AES_ECB:
+			algo = "aes_ecb";
+			mode = CRYPTO_TFM_MODE_CBC;
+			c7108_crypto_mode = C7108_AES_CTRL_MODE_ECB;
+			break;
+		case CRYPTO_AES_OFB:
+			algo = "aes_ofb";
+			mode = CRYPTO_TFM_MODE_CBC;
+			c7108_crypto_mode = C7108_AES_CTRL_MODE_OFB;
+			break;
+		case CRYPTO_AES_CFB:
+			algo = "aes_cfb";
+			mode = CRYPTO_TFM_MODE_CBC;
+			c7108_crypto_mode = C7108_AES_CTRL_MODE_CFB;
+			break;
+#endif
+		default:
+		        printk("unsupported crypto algorithm: %d\n", 
+			       cri->cri_alg);
+			return -EINVAL;
+			break;
+		}
+
+
+		if (!algo || !*algo) {
+		    printk("cypher_7108_crypto: Unknown algo 0x%x\n", 
+			   cri->cri_alg);
+		    c7108_freesession(NULL, i);
+		    return EINVAL;
+		}
+		
+		if (xfm_type == HW_TYPE_CIPHER) {
+		    if (debug) {
+			dprintk("%s key:", __FUNCTION__);
+			for (i = 0; i < (cri->cri_klen + 7) / 8; i++)
+			    dprintk("%s0x%02x", (i % 8) ? " " : "\n    ",
+				    cri->cri_key[i]);
+			dprintk("\n");
+		    }
+
+		} else if (xfm_type == SW_TYPE_HMAC || 
+			   xfm_type == SW_TYPE_HASH) {
+		    printk("cypher_7108_crypto: HMAC unsupported!\n");
+		    return -EINVAL;
+		    c7108_freesession(NULL, i);
+		} else {
+		    printk("cypher_7108_crypto: "
+			   "Unhandled xfm_type %d\n", xfm_type);
+		    c7108_freesession(NULL, i);
+		    return EINVAL;
+		}
+		
+		(*swd)->cri_alg = cri->cri_alg;
+		(*swd)->xfm_type = xfm_type;
+		
+		cri = cri->cri_next;
+		swd = &((*swd)->next);
+	}
+	return 0;
+}
+
+/*
+ * Free a session.
+ */
+static int
+c7108_freesession(void *arg, u_int64_t tid)
+{
+	struct cipher_7108 *swd;
+	u_int32_t sid = CRYPTO_SESID2LID(tid);
+
+	dprintk("%s()\n", __FUNCTION__);
+	if (sid > c7108_sesnum || c7108_sessions == NULL ||
+			c7108_sessions[sid] == NULL) {
+		dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		return(EINVAL);
+	}
+
+	/* Silently accept and return */
+	if (sid == 0)
+		return(0);
+
+	while ((swd = c7108_sessions[sid]) != NULL) {
+		c7108_sessions[sid] = swd->next;
+		kfree(swd);
+	}
+	return 0;
+}
+
+/*
+ * Process a hardware request.
+ */
+static int
+c7108_process(void *arg, struct cryptop *crp, int hint)
+{
+	struct cryptodesc *crd;
+	struct cipher_7108 *sw;
+	u_int32_t lid;
+	int type;
+	u32 hwkey[8];
+
+#define SCATTERLIST_MAX 16
+	struct scatterlist sg[SCATTERLIST_MAX];
+	int sg_num, sg_len, skip;
+	struct sk_buff *skb = NULL;
+	struct uio *uiop = NULL;
+
+	dprintk("%s()\n", __FUNCTION__);
+	/* Sanity check */
+	if (crp == NULL) {
+		dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		return EINVAL;
+	}
+
+	crp->crp_etype = 0;
+
+	if (crp->crp_desc == NULL || crp->crp_buf == NULL) {
+		dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		crp->crp_etype = EINVAL;
+		goto done;
+	}
+
+	lid = crp->crp_sid & 0xffffffff;
+	if (lid >= c7108_sesnum || lid == 0 || c7108_sessions == NULL ||
+			c7108_sessions[lid] == NULL) {
+		crp->crp_etype = ENOENT;
+		dprintk("%s,%d: ENOENT\n", __FILE__, __LINE__);
+		goto done;
+	}
+
+	/*
+	 * do some error checking outside of the loop for SKB and IOV
+	 * processing this leaves us with valid skb or uiop pointers
+	 * for later
+	 */
+	if (crp->crp_flags & CRYPTO_F_SKBUF) {
+		skb = (struct sk_buff *) crp->crp_buf;
+		if (skb_shinfo(skb)->nr_frags >= SCATTERLIST_MAX) {
+			printk("%s,%d: %d nr_frags > SCATTERLIST_MAX", 
+			       __FILE__, __LINE__,
+			       skb_shinfo(skb)->nr_frags);
+			goto done;
+		}
+	} else if (crp->crp_flags & CRYPTO_F_IOV) {
+		uiop = (struct uio *) crp->crp_buf;
+		if (uiop->uio_iovcnt > SCATTERLIST_MAX) {
+			printk("%s,%d: %d uio_iovcnt > SCATTERLIST_MAX", 
+			       __FILE__, __LINE__,
+			       uiop->uio_iovcnt);
+			goto done;
+		}
+	}
+
+	/* Go through crypto descriptors, processing as we go */
+	for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
+	    /*
+	     * Find the crypto context.
+	     *
+	     * XXX Note that the logic here prevents us from having
+	     * XXX the same algorithm multiple times in a session
+	     * XXX (or rather, we can but it won't give us the right
+	     * XXX results). To do that, we'd need some way of differentiating
+	     * XXX between the various instances of an algorithm (so we can
+	     * XXX locate the correct crypto context).
+	     */
+	    for (sw = c7108_sessions[lid]; 
+		 sw && sw->cri_alg != crd->crd_alg;
+		 sw = sw->next)
+		;
+	    
+	    /* No such context ? */
+	    if (sw == NULL) {
+		crp->crp_etype = EINVAL;
+		dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		goto done;
+	    }
+	    
+	    skip = crd->crd_skip;
+	    
+	    /*
+	     * setup the SG list skip from the start of the buffer
+	     */
+	    memset(sg, 0, sizeof(sg));
+	    if (crp->crp_flags & CRYPTO_F_SKBUF) {
+		int i, len;
+		type = CRYPTO_BUF_SKBUF;
+		
+		sg_num = 0;
+		sg_len = 0;
+
+		if (skip < skb_headlen(skb)) {
+		    //sg[sg_num].page   = virt_to_page(skb->data + skip);
+			//sg[sg_num].offset = offset_in_page(skb->data + skip);
+		    len = skb_headlen(skb) - skip;
+		    if (len + sg_len > crd->crd_len)
+			len = crd->crd_len - sg_len;
+		    //sg[sg_num].length = len;
+		    sg_set_page(&sg[sg_num], virt_to_page(skb->data + skip), len, offset_in_page(skb->data + skip));
+			sg_len += sg[sg_num].length;
+		    sg_num++;
+		    skip = 0;
+		} else
+		    skip -= skb_headlen(skb);
+		
+		for (i = 0; sg_len < crd->crd_len &&
+			 i < skb_shinfo(skb)->nr_frags &&
+			 sg_num < SCATTERLIST_MAX; i++) {
+		    if (skip < skb_shinfo(skb)->frags[i].size) {
+			//sg[sg_num].page   = skb_frag_page(&skb_shinfo(skb)->frags[i]);
+			//sg[sg_num].offset = skb_shinfo(skb)->frags[i].page_offset + skip;
+			len = skb_shinfo(skb)->frags[i].size - skip;
+			if (len + sg_len > crd->crd_len)
+			    len = crd->crd_len - sg_len;
+			//sg[sg_num].length = len;
+			sg_set_page(&sg[sg_num], skb_frag_page(&skb_shinfo(skb)->frags[i]), len, skb_shinfo(skb)->frags[i].page_offset + skip);
+			sg_len += sg[sg_num].length;
+			sg_num++;
+			skip = 0;
+		    } else
+			skip -= skb_shinfo(skb)->frags[i].size;
+		}
+	    } else if (crp->crp_flags & CRYPTO_F_IOV) {
+		int len;
+		type = CRYPTO_BUF_IOV;
+		sg_len = 0;
+		for (sg_num = 0; sg_len < crd->crd_len &&
+			 sg_num < uiop->uio_iovcnt &&
+			 sg_num < SCATTERLIST_MAX; sg_num++) {
+		    if (skip < uiop->uio_iov[sg_num].iov_len) {
+			//sg[sg_num].page   =			    virt_to_page(uiop->uio_iov[sg_num].iov_base+skip);
+			//sg[sg_num].offset =			   offset_in_page(uiop->uio_iov[sg_num].iov_base+skip);
+			len = uiop->uio_iov[sg_num].iov_len - skip;
+			if (len + sg_len > crd->crd_len)
+			    len = crd->crd_len - sg_len;
+			//sg[sg_num].length = len;
+			sg_set_page(&sg[sg_num], virt_to_page(uiop->uio_iov[sg_num].iov_base+skip), len, offset_in_page(uiop->uio_iov[sg_num].iov_base+skip));
+			sg_len += sg[sg_num].length;
+			skip = 0;
+		    } else 
+			skip -= uiop->uio_iov[sg_num].iov_len;
+		}
+	    } else {
+		type = CRYPTO_BUF_CONTIG;
+		//sg[0].page   = virt_to_page(crp->crp_buf + skip);
+		//sg[0].offset = offset_in_page(crp->crp_buf + skip);
+		sg_len = (crp->crp_ilen - skip);
+		if (sg_len > crd->crd_len)
+		    sg_len = crd->crd_len;
+		//sg[0].length = sg_len;
+		sg_set_page(&sg[0], virt_to_page(crp->crp_buf + skip), sg_len, offset_in_page(crp->crp_buf + skip));
+		sg_num = 1;
+	    }
+	    if (sg_num > 0)
+		sg_mark_end(&sg[sg_num-1]);
+	    
+	    
+	    switch (sw->xfm_type) {
+
+	    case HW_TYPE_CIPHER: {
+
+		unsigned char iv[64];
+		unsigned char *ivp = iv;
+		int i;
+		int ivsize = 16;    /* fixed for AES */
+		int blocksize = 16; /* fixed for AES */
+
+		if (sg_len < blocksize) {
+		    crp->crp_etype = EINVAL;
+		    dprintk("%s,%d: EINVAL len %d < %d\n", 
+			    __FILE__, __LINE__,
+			    sg_len, 
+			    blocksize);
+		    goto done;
+		}
+		
+		if (ivsize > sizeof(iv)) {
+		    crp->crp_etype = EINVAL;
+		    dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		    goto done;
+		}
+		
+		if (crd->crd_flags & CRD_F_ENCRYPT) { /* encrypt */
+		    
+		    if (crd->crd_flags & CRD_F_IV_EXPLICIT) {
+			ivp = crd->crd_iv;
+		    } else {
+			get_random_bytes(ivp, ivsize);
+		    }
+		    /*
+		     * do we have to copy the IV back to the buffer ?
+		     */
+		    if ((crd->crd_flags & CRD_F_IV_PRESENT) == 0) {
+			    crypto_copyback(crp->crp_buf,
+					  crd->crd_inject,
+					  ivsize,
+					  (caddr_t)ivp);
+		    }
+
+		    c7108_xlate_key(crd->crd_klen,
+				    (u8*)crd->crd_key, (u32*)hwkey);
+
+		    /* Encrypt SG list */
+		    for (i = 0; i < sg_num; i++) { 
+			sg[i].dma_address = 
+			    dma_map_single(NULL, 
+					   kmap(sg_page(&sg[i])) + sg[i].offset, sg_len, DMA_BIDIRECTIONAL);
+#if 0							   
+			printk("sg[%d]:0x%08x, off 0x%08x "
+			       "kmap 0x%08x phys 0x%08x\n", 
+			       i, sg[i].page, sg[i].offset,
+			       kmap(sg[i].page) + sg[i].offset,
+			       sg[i].dma_address);
+#endif
+			c7108_aes_cipher(C7108_AES_ENCRYPT,
+					 sg[i].dma_address,
+					 sg[i].dma_address,
+					 sg_len,
+					 crd->crd_klen,
+					 c7108_crypto_mode,
+					 hwkey,
+					 ivp);
+
+			if ((c7108_crypto_mode == C7108_AES_CTRL_MODE_CBC)||
+			    (c7108_crypto_mode == C7108_AES_CTRL_MODE_ECB)) { 
+			    /* Read back expanded key and cache it in key
+			     * context.
+			     * NOTE: for ECB/CBC modes only (not CTR, CFB, OFB)
+			     *       where you set the key once.
+			     */
+			    c7108_cache_key(crd->crd_klen, 
+					    (u32*)hwkey, (u8*)crd->crd_key);
+#if 0
+			    printk("%s expanded key:", __FUNCTION__);
+			    for (i = 0; i < (crd->crd_klen + 7) / 8; i++)
+				printk("%s0x%02x", (i % 8) ? " " : "\n    ",
+				       crd->crd_key[i]);
+			    printk("\n");
+#endif
+			}
+		    }
+		}
+		else { /*decrypt */
+
+		    if (crd->crd_flags & CRD_F_IV_EXPLICIT) {
+			ivp = crd->crd_iv;
+		    } else {
+			crypto_copydata(crp->crp_buf, crd->crd_inject,
+				  ivsize, (caddr_t)ivp);
+		    }
+
+		    c7108_xlate_key(crd->crd_klen,
+				    (u8*)crd->crd_key, (u32*)hwkey);
+
+		    /* Decrypt SG list */
+		    for (i = 0; i < sg_num; i++) { 
+			sg[i].dma_address = 
+			    dma_map_single(NULL, 
+					   kmap(sg_page(&sg[i])) + sg[i].offset,
+					   sg_len, DMA_BIDIRECTIONAL);
+
+#if 0
+			printk("sg[%d]:0x%08x, off 0x%08x "
+			       "kmap 0x%08x phys 0x%08x\n", 
+			       i, sg[i].page, sg[i].offset,
+			       kmap(sg[i].page) + sg[i].offset,
+			       sg[i].dma_address);
+#endif
+			c7108_aes_cipher(C7108_AES_DECRYPT,
+					 sg[i].dma_address,
+					 sg[i].dma_address,
+					 sg_len,
+					 crd->crd_klen,
+					 c7108_crypto_mode,
+					 hwkey,
+					 ivp);
+		    }
+		}
+	    } break;
+	    case SW_TYPE_HMAC:
+	    case SW_TYPE_HASH:
+		crp->crp_etype = EINVAL;
+		goto done;
+		break;
+		
+	    case SW_TYPE_COMP:
+		crp->crp_etype = EINVAL;
+		goto done;
+		break;
+		
+	    default:
+		/* Unknown/unsupported algorithm */
+		dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
+		crp->crp_etype = EINVAL;
+		goto done;
+	    }
+	}
+	
+done:
+	crypto_done(crp);
+	return 0;
+}
+
+static struct {                                                                                                                 
+	softc_device_decl sc_dev;                                                                                               
+} a7108dev;
+
+static device_method_t a7108_methods = {                                                                                          
+/* crypto device methods */                                                                                             
+	DEVMETHOD(cryptodev_newsession, c7108_newsession),                                                                  
+	DEVMETHOD(cryptodev_freesession, c7108_freesession),                                                             
+	DEVMETHOD(cryptodev_process, c7108_process),                                                                     
+	DEVMETHOD(cryptodev_kprocess, NULL) 
+};   
+
+static int
+cypher_7108_crypto_init(void)
+{
+	dprintk("%s(%p)\n", __FUNCTION__, cypher_7108_crypto_init);
+	
+	iobar = (unsigned long)ioremap(CCU_AES_REG_BASE, 0x4000);
+	printk("7108: AES @ 0x%08x (0x%08x phys) %s mode\n", 
+	       iobar, CCU_AES_REG_BASE, 
+	       c7108_crypto_mode & C7108_AES_CTRL_MODE_CBC ? "CBC" :
+	       c7108_crypto_mode & C7108_AES_CTRL_MODE_ECB ? "ECB" : 
+	       c7108_crypto_mode & C7108_AES_CTRL_MODE_CTR ? "CTR" : 
+	       c7108_crypto_mode & C7108_AES_CTRL_MODE_CFB ? "CFB" : 
+	       c7108_crypto_mode & C7108_AES_CTRL_MODE_OFB ? "OFB" : "???");
+	csr_mutex  = SPIN_LOCK_UNLOCKED;
+
+	memset(&a7108dev, 0, sizeof(a7108dev));                                                                                     
+	softc_device_init(&a7108dev, "aes7108", 0, a7108_methods);
+
+       	c7108_id = crypto_get_driverid(softc_get_device(&a7108dev), CRYPTOCAP_F_HARDWARE);
+	if (c7108_id < 0)
+		panic("7108: crypto device cannot initialize!");
+
+//	crypto_register(c7108_id, CRYPTO_AES_CBC, 0, 0, c7108_newsession, c7108_freesession, c7108_process, NULL);
+	crypto_register(c7108_id, CRYPTO_AES_CBC, 0, 0);
+
+	return(0);
+}
+
+static void
+cypher_7108_crypto_exit(void)
+{
+	dprintk("%s()\n", __FUNCTION__);
+	crypto_unregister_all(c7108_id);
+	c7108_id = -1;
+}
+
+module_init(cypher_7108_crypto_init);
+module_exit(cypher_7108_crypto_exit);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("Cypher 7108 Crypto (OCF module for kernel crypto)");