--- /dev/null
+/*
+ * 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_shinfo(skb)->frags[i].page;
+ //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_shinfo(skb)->frags[i].page, 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;
+ }
+
+
+ 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)");
projects / 15.05 / openwrt.git / blobdiff