diff options
Diffstat (limited to 'target/linux/generic/files/crypto/ocf/criov.c')
| -rw-r--r-- | target/linux/generic/files/crypto/ocf/criov.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/target/linux/generic/files/crypto/ocf/criov.c b/target/linux/generic/files/crypto/ocf/criov.c new file mode 100644 index 000000000..a8c1a8c4d --- /dev/null +++ b/target/linux/generic/files/crypto/ocf/criov.c @@ -0,0 +1,215 @@ +/* $OpenBSD: criov.c,v 1.9 2002/01/29 15:48:29 jason Exp $ */ + +/* + * Linux port done by David McCullough <david_mccullough@mcafee.com> + * Copyright (C) 2006-2010 David McCullough + * Copyright (C) 2004-2005 Intel Corporation. + * The license and original author are listed below. + * + * Copyright (c) 1999 Theo de Raadt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 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. + * +__FBSDID("$FreeBSD: src/sys/opencrypto/criov.c,v 1.5 2006/06/04 22:15:13 pjd Exp $"); + */ + +#include <linux/version.h> +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) && !defined(AUTOCONF_INCLUDED) +#include <linux/config.h> +#endif +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/uio.h> +#include <linux/skbuff.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <asm/io.h> + +#include <uio.h> +#include <cryptodev.h> + +/* + * This macro is only for avoiding code duplication, as we need to skip + * given number of bytes in the same way in three functions below. + */ +#define CUIO_SKIP() do { \ + KASSERT(off >= 0, ("%s: off %d < 0", __func__, off)); \ + KASSERT(len >= 0, ("%s: len %d < 0", __func__, len)); \ + while (off > 0) { \ + KASSERT(iol >= 0, ("%s: empty in skip", __func__)); \ + if (off < iov->iov_len) \ + break; \ + off -= iov->iov_len; \ + iol--; \ + iov++; \ + } \ +} while (0) + +void +cuio_copydata(struct uio* uio, int off, int len, caddr_t cp) +{ + struct iovec *iov = uio->uio_iov; + int iol = uio->uio_iovcnt; + unsigned count; + + CUIO_SKIP(); + while (len > 0) { + KASSERT(iol >= 0, ("%s: empty", __func__)); + count = min((int)(iov->iov_len - off), len); + memcpy(cp, ((caddr_t)iov->iov_base) + off, count); + len -= count; + cp += count; + off = 0; + iol--; + iov++; + } +} + +void +cuio_copyback(struct uio* uio, int off, int len, caddr_t cp) +{ + struct iovec *iov = uio->uio_iov; + int iol = uio->uio_iovcnt; + unsigned count; + + CUIO_SKIP(); + while (len > 0) { + KASSERT(iol >= 0, ("%s: empty", __func__)); + count = min((int)(iov->iov_len - off), len); + memcpy(((caddr_t)iov->iov_base) + off, cp, count); + len -= count; + cp += count; + off = 0; + iol--; + iov++; + } +} + +/* + * Return a pointer to iov/offset of location in iovec list. + */ +struct iovec * +cuio_getptr(struct uio *uio, int loc, int *off) +{ + struct iovec *iov = uio->uio_iov; + int iol = uio->uio_iovcnt; + + while (loc >= 0) { + /* Normal end of search */ + if (loc < iov->iov_len) { + *off = loc; + return (iov); + } + + loc -= iov->iov_len; + if (iol == 0) { + if (loc == 0) { + /* Point at the end of valid data */ + *off = iov->iov_len; + return (iov); + } else + return (NULL); + } else { + iov++, iol--; + } + } + + return (NULL); +} + +EXPORT_SYMBOL(cuio_copyback); +EXPORT_SYMBOL(cuio_copydata); +EXPORT_SYMBOL(cuio_getptr); + +static void +skb_copy_bits_back(struct sk_buff *skb, int offset, caddr_t cp, int len) +{ + int i; + if (offset < skb_headlen(skb)) { + memcpy(skb->data + offset, cp, min_t(int, skb_headlen(skb), len)); + len -= skb_headlen(skb); + cp += skb_headlen(skb); + } + offset -= skb_headlen(skb); + for (i = 0; len > 0 && i < skb_shinfo(skb)->nr_frags; i++) { + if (offset < skb_shinfo(skb)->frags[i].size) { + memcpy(page_address(skb_frag_page(&skb_shinfo(skb)->frags[i])) + + skb_shinfo(skb)->frags[i].page_offset, + cp, min_t(int, skb_shinfo(skb)->frags[i].size, len)); + len -= skb_shinfo(skb)->frags[i].size; + cp += skb_shinfo(skb)->frags[i].size; + } + offset -= skb_shinfo(skb)->frags[i].size; + } +} + +void +crypto_copyback(int flags, caddr_t buf, int off, int size, caddr_t in) +{ + + if ((flags & CRYPTO_F_SKBUF) != 0) + skb_copy_bits_back((struct sk_buff *)buf, off, in, size); + else if ((flags & CRYPTO_F_IOV) != 0) + cuio_copyback((struct uio *)buf, off, size, in); + else + bcopy(in, buf + off, size); +} + +void +crypto_copydata(int flags, caddr_t buf, int off, int size, caddr_t out) +{ + + if ((flags & CRYPTO_F_SKBUF) != 0) + skb_copy_bits((struct sk_buff *)buf, off, out, size); + else if ((flags & CRYPTO_F_IOV) != 0) + cuio_copydata((struct uio *)buf, off, size, out); + else + bcopy(buf + off, out, size); +} + +int +crypto_apply(int flags, caddr_t buf, int off, int len, + int (*f)(void *, void *, u_int), void *arg) +{ +#if 0 + int error; + + if ((flags & CRYPTO_F_SKBUF) != 0) + error = XXXXXX((struct mbuf *)buf, off, len, f, arg); + else if ((flags & CRYPTO_F_IOV) != 0) + error = cuio_apply((struct uio *)buf, off, len, f, arg); + else + error = (*f)(arg, buf + off, len); + return (error); +#else + KASSERT(0, ("crypto_apply not implemented!\n")); +#endif + return 0; +} + +EXPORT_SYMBOL(crypto_copyback); +EXPORT_SYMBOL(crypto_copydata); +EXPORT_SYMBOL(crypto_apply); + |