+++ /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_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)");
projects / openwrt / staging / chunkeey.git / blobdiff