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/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* All rights reserved.
*
* 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. Neither the name of the project nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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 <sys/syscall.h>
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/dms.h>
#include <os/systm.h>
#include <os/kalloc.h>
#include <dms/dms.h>
#include <string.h>
static ssize_t
dms_io(struct dms_frame *dfp)
{
struct dms_disk *dp;
struct dms_diskinfo info;
size_t len;
ssize_t retval = -ENXIO;
int error;
void *kbuf;
if (dfp == NULL) {
return -EINVAL;
}
if ((len = dfp->len) == 0) {
return -EINVAL;
}
if ((dp = dms_get(dfp->id)) == NULL) {
return -ENODEV;
}
if ((kbuf = kalloc(dfp->len)) == NULL) {
return -ENOMEM;
}
switch (dfp->opcode) {
case DMS_OPC_READ:
retval = dms_read(dp, kbuf, dfp->offset, dfp->len);
if (retval < 0) {
break;
}
error = copyout(kbuf, dfp->buf, dfp->len);
if (error < 0) {
retval = error;
break;
}
break;
case DMS_OPC_WRITE:
error = copyin(dfp->buf, kbuf, dfp->len);
if (error < 0) {
retval = error;
break;
}
retval = dms_write(dp, kbuf, dfp->offset, dfp->len);
break;
case DMS_OPC_QUERY:
memcpy(info.name, dp->name, sizeof(info.name));
info.bsize = dp->bsize;
info.id = dp->id;
if (dfp->len > sizeof(info))
dfp->len = sizeof(info);
retval = copyout(&info, dfp->buf, dfp->len);
break;
}
kfree(kbuf);
return retval;
}
/*
* ARG0: DMS frame pointer
*/
scret_t
sys_dmsio(struct syscall_args *scargs)
{
struct dms_frame *u_dfp = SCARG(scargs, struct dms_frame *, 0);
struct dms_frame df;
int error;
error = copyin(u_dfp, &df, sizeof(df));
if (error < 0) {
return error;
}
return dms_io(&df);
}
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