/*
* 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.
*/
#include <opencrypto/cryptodev.h>
int cuio_getindx(struct uio *uio, int loc, int *off);
void
cuio_copydata(struct uio *uio, int off, int len, void *cp)
{
struct iovec *iov = uio->uio_iov;
int iol = uio->uio_iovcnt;
unsigned count;
if (off < 0)
panic("cuio_copydata: off %d < 0", off);
if (len < 0)
panic("cuio_copydata: len %d < 0", len);
while (off > 0) {
if (iol == 0)
panic("iov_copydata: empty in skip");
if (off < iov->iov_len)
break;
off -= iov->iov_len;
iol--;
iov++;
}
while (len > 0) {
if (iol == 0)
panic("cuio_copydata: empty");
count = uimin(iov->iov_len - off, len);
memcpy(cp, (char *)iov->iov_base + off, count);
len -= count;
cp = (char *)cp + count;
off = 0;
iol--;
iov++;
}
}
void
cuio_copyback(struct uio *uio, int off, int len, void *cp)
{
struct iovec *iov = uio->uio_iov;
int iol = uio->uio_iovcnt;
unsigned count;
if (off < 0)
panic("cuio_copyback: off %d < 0", off);
if (len < 0)
panic("cuio_copyback: len %d < 0", len);
while (off > 0) {
if (iol == 0) {
#ifdef DEBUG
printf("cuio_copyback: empty in skip\n");
#endif
return;
}
if (off < iov->iov_len)
break;
off -= iov->iov_len;
iol--;
iov++;
}
while (len > 0) {
if (iol == 0) {
#ifdef DEBUG
printf("uio_copyback: empty\n");
#endif
return;
}
count = uimin(iov->iov_len - off, len);
memcpy((char *)iov->iov_base + off, cp, count);
len -= count;
cp = (char *)cp + count;
off = 0;
iol--;
iov++;
}
}
/*
* Return a pointer to iov/offset of location in iovec list.
*/
int
cuio_getptr(struct uio *uio, int loc, int *off)
{
int ind, len;
ind = 0;
while (loc >= 0 && ind < uio->uio_iovcnt) {
len = uio->uio_iov[ind].iov_len;
if (len > loc) {
*off = loc;
return (ind);
}
loc -= len;
ind++;
}
if (ind > 0 && loc == 0) {
ind--;
*off = uio->uio_iov[ind].iov_len;
return (ind);
}
return (-1);
}
int
cuio_apply(struct uio *uio, int off, int len,
int (*f)(void *, void *, unsigned int), void *fstate)
{
int rval, ind, uiolen;
unsigned int count;
if (len < 0)
panic("%s: len %d < 0", __func__, len);
if (off < 0)
panic("%s: off %d < 0", __func__, off);
ind = 0;
while (off > 0) {
if (ind >= uio->uio_iovcnt)
panic("cuio_apply: out of ivecs before data in uio");
uiolen = uio->uio_iov[ind].iov_len;
if (off < uiolen)
break;
off -= uiolen;
ind++;
}
while (len > 0) {
if (ind >= uio->uio_iovcnt)
panic("cuio_apply: out of ivecs when processing uio");
count = uimin(uio->uio_iov[ind].iov_len - off, len);
