/*      $NetBSD: pud_dev.c,v 1.8 2024/02/04 18:52:36 andvar Exp $       */

/*
* Copyright (c) 2007  Antti Kantee.  All Rights Reserved.
*
* Development of this software was supported by the
* Research Foundation of Helsinki University of Technology
*
* 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.
*
* 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 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pud_dev.c,v 1.8 2024/02/04 18:52:36 andvar Exp $");

#include <sys/param.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/event.h>
#include <sys/ioccom.h>
#include <sys/kmem.h>
#include <sys/poll.h>
#include <sys/socketvar.h>

#include <dev/pud/pud_sys.h>

/*
* b/c independent helpers
*/

static int
doopenclose(dev_t dev, int flags, int fmt, int class, int type)
{
       struct pud_req_openclose pc_oc; /* XXX: stack = stupid */

       pc_oc.pm_flags = flags;
       pc_oc.pm_fmt = fmt;

       return pud_request(dev, &pc_oc, sizeof(pc_oc), class, type);
}

#include <sys/disklabel.h>
static int
doioctl(dev_t dev, u_long cmd, void *data, int flag, int class, int type)
{
       struct pud_req_ioctl *pc_ioctl;
       size_t dlen, allocsize;
       int error;

       dlen = IOCPARM_LEN(cmd);
       allocsize = sizeof(struct pud_req_ioctl) + dlen;
       pc_ioctl = kmem_zalloc(allocsize, KM_SLEEP);

       pc_ioctl->pm_iocmd = cmd;
       pc_ioctl->pm_flag = flag;

       if (cmd & IOC_IN)
               memcpy(pc_ioctl->pm_data, data, dlen);
       error = pud_request(dev, pc_ioctl, allocsize, class, type);
       if (error)
               goto out;
       if (cmd & IOC_OUT)
               memcpy(data, pc_ioctl->pm_data, dlen);

out:
       kmem_free(pc_ioctl, allocsize);
       return error;
}

/*
* Block de-vices
*/

static dev_type_open(pud_bdev_open);
static dev_type_close(pud_bdev_close);
static dev_type_strategy(pud_bdev_strategy);
static dev_type_ioctl(pud_bdev_ioctl);
#if 0
static dev_type_dump(pud_bdev_dump);
static dev_type_size(pud_bdev_size);
#endif

struct bdevsw pud_bdevsw = {
       .d_open         = pud_bdev_open,
       .d_close        = pud_bdev_close,
       .d_strategy     = pud_bdev_strategy,
       .d_ioctl        = pud_bdev_ioctl,
#if 0
       .d_dump         = pud_bdev_dump,
       .d_psize        = pud_bdev_size,
#endif
};

static int
pud_bdev_open(dev_t dev, int flags, int fmt, lwp_t *l)
{

       return doopenclose(dev, flags, fmt, PUD_REQ_BDEV, PUD_BDEV_OPEN);
}

static int
pud_bdev_close(dev_t dev, int flags, int fmt, lwp_t *l)
{

       return doopenclose(dev, flags, fmt, PUD_REQ_BDEV, PUD_BDEV_CLOSE);
}

static void
pud_bdev_strategy(struct buf *bp)
{
       struct pud_req_readwrite *pc_rw;
       size_t allocsize;
       int error;

       allocsize = sizeof(struct pud_req_readwrite) + bp->b_bcount;
       pc_rw = kmem_zalloc(allocsize, KM_SLEEP);

       pc_rw->pm_offset = bp->b_blkno << DEV_BSHIFT;
       pc_rw->pm_resid = bp->b_bcount;

       if (BUF_ISWRITE(bp))
               memcpy(pc_rw->pm_data, bp->b_data, bp->b_bcount);

       error = pud_request(bp->b_dev, pc_rw, allocsize, PUD_REQ_BDEV,
           BUF_ISREAD(bp) ? PUD_BDEV_STRATREAD : PUD_BDEV_STRATWRITE);
       if (error)
               goto out;

       if (pc_rw->pm_resid > bp->b_bcount) {
               error = EINVAL;
               goto out;
       }

       if (BUF_ISREAD(bp))
               memcpy(bp->b_data,pc_rw->pm_data,bp->b_bcount-pc_rw->pm_resid);

       bp->b_resid = pc_rw->pm_resid;

out:
       kmem_free(pc_rw, allocsize);
       bp->b_error = error;
       biodone(bp);
}

int
pud_bdev_ioctl(dev_t dev, u_long cmd, void *data, int flag, lwp_t *l)
{

       return doioctl(dev, cmd, data, flag, PUD_REQ_BDEV, PUD_BDEV_IOCTL);
}

/* hnmmm */
#if 0
int
pud_bdev_dump(dev_t dev, daddr_t addr, void *data, size_t sz)
{

       return EOPNOTSUPP;
}

int
pud_bdev_size(dev_t dev)
{

       return 0;
}
#endif

/*
* Char devices
*/

static dev_type_open(pud_cdev_open);
static dev_type_close(pud_cdev_close);
static dev_type_read(pud_cdev_read);
static dev_type_write(pud_cdev_write);
static dev_type_ioctl(pud_cdev_ioctl);
static dev_type_poll(pud_cdev_poll);
static dev_type_mmap(pud_cdev_mmap);
static dev_type_kqfilter(pud_cdev_kqfilter);

struct cdevsw pud_cdevsw = {
       .d_open         = pud_cdev_open,
       .d_close        = pud_cdev_close,
       .d_read         = pud_cdev_read,
       .d_write        = pud_cdev_write,
       .d_ioctl        = pud_cdev_ioctl,
#if 0
       .d_stop         = pud_cdev_stop,
       .d_tty          = pud_cdev_tty,
#endif
       .d_poll         = pud_cdev_poll,
       .d_mmap         = pud_cdev_mmap,
       .d_kqfilter     = pud_cdev_kqfilter,
       .d_flag         = D_OTHER,
};

static int
pud_cdev_open(dev_t dev, int flags, int fmt, lwp_t *l)
{

       return doopenclose(dev, flags, fmt, PUD_REQ_CDEV, PUD_CDEV_OPEN);
}

static int
pud_cdev_close(dev_t dev, int flags, int fmt, lwp_t *l)
{

       return doopenclose(dev, flags, fmt, PUD_REQ_CDEV, PUD_CDEV_CLOSE);
}

static int
pud_cdev_read(dev_t dev, struct uio *uio, int flag)
{
       struct pud_creq_read *pc_read;
       size_t allocsize;
       int error;

       allocsize = sizeof(struct pud_creq_read) + uio->uio_resid;
       pc_read = kmem_zalloc(allocsize, KM_SLEEP);

       pc_read->pm_offset = uio->uio_offset;
       pc_read->pm_resid = uio->uio_resid;

       error = pud_request(dev, pc_read, allocsize,
           PUD_REQ_CDEV, PUD_CDEV_READ);
       if (error)
               goto out;

       if (pc_read->pm_resid > uio->uio_resid) {
               error = EINVAL;
               goto out;
       }

       error = uiomove(pc_read->pm_data,
           uio->uio_resid - pc_read->pm_resid, uio);

out:
       kmem_free(pc_read, allocsize);
       return error;
}

static int
pud_cdev_write(dev_t dev, struct uio *uio, int flag)
{
       struct pud_creq_write *pc_write;
       size_t allocsize;
       int error;

       allocsize = sizeof(struct pud_creq_write) + uio->uio_resid;
       pc_write = kmem_zalloc(allocsize, KM_SLEEP);

       pc_write->pm_offset = uio->uio_offset;
       pc_write->pm_resid = uio->uio_resid;

       error = uiomove(pc_write->pm_data, uio->uio_resid, uio);
       if (error)
               goto out;

       error = pud_request(dev, pc_write, allocsize,
           PUD_REQ_CDEV, PUD_CDEV_WRITE);
       if (error)
               goto out;

       if (pc_write->pm_resid)
               error = EIO;

out:
       kmem_free(pc_write, allocsize);
       return error;
}

static int
pud_cdev_ioctl(dev_t dev, u_long cmd, void *data, int flag, lwp_t *l)
{

       return doioctl(dev, cmd, data, flag, PUD_REQ_CDEV, PUD_CDEV_IOCTL);
}

static paddr_t
pud_cdev_mmap(dev_t dev, off_t off, int flag)
{

       return (paddr_t)-1;
}

static int
pud_cdev_poll(dev_t dev, int flag, lwp_t *l)
{

       return EOPNOTSUPP;
}

static int
pud_cdev_kqfilter(dev_t dev, struct knote *kn)
{

       return EOPNOTSUPP;
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.