mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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rename target/linux/generic-2.6 to generic
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21952 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
215
target/linux/generic/files/crypto/ocf/criov.c
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215
target/linux/generic/files/crypto/ocf/criov.c
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/* $OpenBSD: criov.c,v 1.9 2002/01/29 15:48:29 jason Exp $ */
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/*
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* Linux port done by David McCullough <david_mccullough@mcafee.com>
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* Copyright (C) 2006-2010 David McCullough
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* Copyright (C) 2004-2005 Intel Corporation.
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* The license and original author are listed below.
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*
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* Copyright (c) 1999 Theo de Raadt
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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__FBSDID("$FreeBSD: src/sys/opencrypto/criov.c,v 1.5 2006/06/04 22:15:13 pjd Exp $");
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*/
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#ifndef AUTOCONF_INCLUDED
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#include <linux/config.h>
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#endif
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/uio.h>
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#include <linux/skbuff.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <asm/io.h>
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#include <uio.h>
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#include <cryptodev.h>
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/*
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* This macro is only for avoiding code duplication, as we need to skip
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* given number of bytes in the same way in three functions below.
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*/
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#define CUIO_SKIP() do { \
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KASSERT(off >= 0, ("%s: off %d < 0", __func__, off)); \
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KASSERT(len >= 0, ("%s: len %d < 0", __func__, len)); \
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while (off > 0) { \
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KASSERT(iol >= 0, ("%s: empty in skip", __func__)); \
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if (off < iov->iov_len) \
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break; \
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off -= iov->iov_len; \
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iol--; \
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iov++; \
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} \
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} while (0)
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void
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cuio_copydata(struct uio* uio, int off, int len, caddr_t cp)
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{
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struct iovec *iov = uio->uio_iov;
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int iol = uio->uio_iovcnt;
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unsigned count;
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CUIO_SKIP();
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while (len > 0) {
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KASSERT(iol >= 0, ("%s: empty", __func__));
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count = min((int)(iov->iov_len - off), len);
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memcpy(cp, ((caddr_t)iov->iov_base) + off, count);
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len -= count;
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cp += count;
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off = 0;
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iol--;
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iov++;
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}
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}
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void
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cuio_copyback(struct uio* uio, int off, int len, caddr_t cp)
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{
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struct iovec *iov = uio->uio_iov;
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int iol = uio->uio_iovcnt;
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unsigned count;
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CUIO_SKIP();
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while (len > 0) {
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KASSERT(iol >= 0, ("%s: empty", __func__));
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count = min((int)(iov->iov_len - off), len);
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memcpy(((caddr_t)iov->iov_base) + off, cp, count);
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len -= count;
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cp += count;
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off = 0;
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iol--;
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iov++;
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}
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}
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/*
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* Return a pointer to iov/offset of location in iovec list.
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*/
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struct iovec *
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cuio_getptr(struct uio *uio, int loc, int *off)
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{
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struct iovec *iov = uio->uio_iov;
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int iol = uio->uio_iovcnt;
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while (loc >= 0) {
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/* Normal end of search */
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if (loc < iov->iov_len) {
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*off = loc;
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return (iov);
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}
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loc -= iov->iov_len;
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if (iol == 0) {
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if (loc == 0) {
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/* Point at the end of valid data */
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*off = iov->iov_len;
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return (iov);
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} else
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return (NULL);
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} else {
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iov++, iol--;
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}
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}
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return (NULL);
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}
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EXPORT_SYMBOL(cuio_copyback);
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EXPORT_SYMBOL(cuio_copydata);
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EXPORT_SYMBOL(cuio_getptr);
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static void
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skb_copy_bits_back(struct sk_buff *skb, int offset, caddr_t cp, int len)
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{
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int i;
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if (offset < skb_headlen(skb)) {
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memcpy(skb->data + offset, cp, min_t(int, skb_headlen(skb), len));
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len -= skb_headlen(skb);
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cp += skb_headlen(skb);
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}
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offset -= skb_headlen(skb);
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for (i = 0; len > 0 && i < skb_shinfo(skb)->nr_frags; i++) {
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if (offset < skb_shinfo(skb)->frags[i].size) {
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memcpy(page_address(skb_shinfo(skb)->frags[i].page) +
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skb_shinfo(skb)->frags[i].page_offset,
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cp, min_t(int, skb_shinfo(skb)->frags[i].size, len));
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len -= skb_shinfo(skb)->frags[i].size;
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cp += skb_shinfo(skb)->frags[i].size;
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}
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offset -= skb_shinfo(skb)->frags[i].size;
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}
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}
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void
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crypto_copyback(int flags, caddr_t buf, int off, int size, caddr_t in)
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{
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if ((flags & CRYPTO_F_SKBUF) != 0)
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skb_copy_bits_back((struct sk_buff *)buf, off, in, size);
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else if ((flags & CRYPTO_F_IOV) != 0)
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cuio_copyback((struct uio *)buf, off, size, in);
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else
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bcopy(in, buf + off, size);
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}
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void
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crypto_copydata(int flags, caddr_t buf, int off, int size, caddr_t out)
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{
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if ((flags & CRYPTO_F_SKBUF) != 0)
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skb_copy_bits((struct sk_buff *)buf, off, out, size);
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else if ((flags & CRYPTO_F_IOV) != 0)
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cuio_copydata((struct uio *)buf, off, size, out);
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else
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bcopy(buf + off, out, size);
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}
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int
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crypto_apply(int flags, caddr_t buf, int off, int len,
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int (*f)(void *, void *, u_int), void *arg)
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{
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#if 0
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int error;
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if ((flags & CRYPTO_F_SKBUF) != 0)
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error = XXXXXX((struct mbuf *)buf, off, len, f, arg);
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else if ((flags & CRYPTO_F_IOV) != 0)
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error = cuio_apply((struct uio *)buf, off, len, f, arg);
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else
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error = (*f)(arg, buf + off, len);
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return (error);
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#else
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KASSERT(0, ("crypto_apply not implemented!\n"));
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#endif
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return 0;
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}
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EXPORT_SYMBOL(crypto_copyback);
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EXPORT_SYMBOL(crypto_copydata);
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EXPORT_SYMBOL(crypto_apply);
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