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freebsd-dev/sys/dev/iir/iir_ctrl.c
Ed Schouten 6bfa9a2d66 Replace all calls to minor() with dev2unit(). 
After I removed all the unit2minor()/minor2unit() calls from the kernel
yesterday, I realised calling minor() everywhere is quite confusing.
Character devices now only have the ability to store a unit number, not
a minor number. Remove the confusion by using dev2unit() everywhere.

This commit could also be considered as a bug fix. A lot of drivers call
minor(), while they should actually be calling dev2unit(). In -CURRENT
this isn't a problem, but it turns out we never had any problem reports
related to that issue in the past. I suspect not many people connect
more than 256 pieces of the same hardware.

Reviewed by:	kib
2008-09-27 08:51:18 +00:00

385 lines
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/*-
* Copyright (c) 2000-03 ICP vortex GmbH
* Copyright (c) 2002-03 Intel Corporation
* Copyright (c) 2003 Adaptec Inc.
* 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,
* without modification, immediately at the beginning of the file.
* 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 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 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.
*/
/*
* iir_ctrl.c: Control functions and /dev entry points for /dev/iir*
*
* Written by: Achim Leubner <achim_leubner@adaptec.com>
* Fixes/Additions: Boji Tony Kannanthanam <boji.t.kannanthanam@intel.com>
*
* $Id: iir_ctrl.c 1.3 2003/08/26 12:31:15 achim Exp $"
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/endian.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/uio.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <sys/stat.h>
#include <sys/disklabel.h>
#include <machine/bus.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <vm/vm_extern.h>
#include <vm/pmap.h>
#include <dev/iir/iir.h>
/* Entry points and other prototypes */
static struct gdt_softc *gdt_minor2softc(int minor_no);
static d_open_t iir_open;
static d_close_t iir_close;
static d_write_t iir_write;
static d_read_t iir_read;
static d_ioctl_t iir_ioctl;
/* Normally, this is a static structure. But we need it in pci/iir_pci.c */
static struct cdevsw iir_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = iir_open,
.d_close = iir_close,
.d_read = iir_read,
.d_write = iir_write,
.d_ioctl = iir_ioctl,
.d_name = "iir",
};
/*
static int iir_devsw_installed = 0;
*/
#ifndef SDEV_PER_HBA
static int sdev_made = 0;
#endif
extern int gdt_cnt;
extern char ostype[];
extern char osrelease[];
extern gdt_statist_t gdt_stat;
/*
* Given a controller number,
* make a special device and return the dev_t
*/
struct cdev *
gdt_make_dev(int unit)
{
struct cdev *dev;
#ifdef SDEV_PER_HBA
dev = make_dev(&iir_cdevsw, hba2minor(unit), UID_ROOT, GID_OPERATOR,
S_IRUSR | S_IWUSR, "iir%d", unit);
#else
if (sdev_made)
return (0);
dev = make_dev(&iir_cdevsw, 0, UID_ROOT, GID_OPERATOR,
S_IRUSR | S_IWUSR, "iir");
sdev_made = 1;
#endif
return (dev);
}
void
gdt_destroy_dev(struct cdev *dev)
{
if (dev != NULL)
destroy_dev(dev);
}
/*
* Given a minor device number,
* return the pointer to its softc structure
*/
static struct gdt_softc *
gdt_minor2softc(int minor_no)
{
struct gdt_softc *gdt;
int hanum;
#ifdef SDEV_PER_HBA
hanum = minor2hba(minor_no);
#else
hanum = minor_no;
#endif
for (gdt = TAILQ_FIRST(&gdt_softcs);
gdt != NULL && gdt->sc_hanum != hanum;
gdt = TAILQ_NEXT(gdt, links));
return (gdt);
}
static int
iir_open(struct cdev *dev, int flags, int fmt, d_thread_t * p)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_open()\n"));
#ifdef SDEV_PER_HBA
int minor_no;
struct gdt_softc *gdt;
minor_no = dev2unit(dev);
gdt = gdt_minor2softc(minor_no);
if (gdt == NULL)
return (ENXIO);
#endif
return (0);
}
static int
iir_close(struct cdev *dev, int flags, int fmt, d_thread_t * p)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_close()\n"));
#ifdef SDEV_PER_HBA
int minor_no;
struct gdt_softc *gdt;
minor_no = dev2unit(dev);
gdt = gdt_minor2softc(minor_no);
if (gdt == NULL)
return (ENXIO);
#endif
return (0);
}
static int
iir_write(struct cdev *dev, struct uio * uio, int ioflag)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_write()\n"));
#ifdef SDEV_PER_HBA
int minor_no;
struct gdt_softc *gdt;
minor_no = dev2unit(dev);
gdt = gdt_minor2softc(minor_no);
if (gdt == NULL)
return (ENXIO);
#endif
return (0);
}
static int
iir_read(struct cdev *dev, struct uio * uio, int ioflag)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_read()\n"));
#ifdef SDEV_PER_HBA
int minor_no;
struct gdt_softc *gdt;
minor_no = dev2unit(dev);
gdt = gdt_minor2softc(minor_no);
if (gdt == NULL)
return (ENXIO);
#endif
return (0);
}
/**
* This is the control syscall interface.
* It should be binary compatible with UnixWare,
* if not totally syntatically so.
*/
static int
iir_ioctl(struct cdev *dev, u_long cmd, caddr_t cmdarg, int flags, d_thread_t * p)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_ioctl() cmd 0x%lx\n",cmd));
#ifdef SDEV_PER_HBA
int minor_no;
struct gdt_softc *gdt;
minor_no = dev2unit(dev);
gdt = gdt_minor2softc(minor_no);
if (gdt == NULL)
return (ENXIO);
#endif
++gdt_stat.io_count_act;
if (gdt_stat.io_count_act > gdt_stat.io_count_max)
gdt_stat.io_count_max = gdt_stat.io_count_act;
switch (cmd) {
case GDT_IOCTL_GENERAL:
{
gdt_ucmd_t *ucmd;
struct gdt_softc *gdt;
int lock;
ucmd = (gdt_ucmd_t *)cmdarg;
gdt = gdt_minor2softc(ucmd->io_node);
if (gdt == NULL)
return (ENXIO);
lock = splcam();
TAILQ_INSERT_TAIL(&gdt->sc_ucmd_queue, ucmd, links);
ucmd->complete_flag = FALSE;
splx(lock);
gdt_next(gdt);
if (!ucmd->complete_flag)
(void) tsleep((void *)ucmd, PCATCH | PRIBIO, "iirucw", 0);
break;
}
case GDT_IOCTL_DRVERS:
case GDT_IOCTL_DRVERS_OLD:
*(int *)cmdarg =
(IIR_DRIVER_VERSION << 8) | IIR_DRIVER_SUBVERSION;
break;
case GDT_IOCTL_CTRTYPE:
case GDT_IOCTL_CTRTYPE_OLD:
{
gdt_ctrt_t *p;
struct gdt_softc *gdt;
p = (gdt_ctrt_t *)cmdarg;
gdt = gdt_minor2softc(p->io_node);
if (gdt == NULL)
return (ENXIO);
/* only RP controllers */
p->ext_type = 0x6000 | gdt->sc_device;
if (gdt->sc_vendor == INTEL_VENDOR_ID) {
p->oem_id = OEM_ID_INTEL;
p->type = 0xfd;
/* new -> subdevice into ext_type */
if (gdt->sc_device >= 0x600)
p->ext_type = 0x6000 | gdt->sc_subdevice;
} else {
p->oem_id = OEM_ID_ICP;
p->type = 0xfe;
/* new -> subdevice into ext_type */
if (gdt->sc_device >= 0x300)
p->ext_type = 0x6000 | gdt->sc_subdevice;
}
p->info = (gdt->sc_bus << 8) | (gdt->sc_slot << 3);
p->device_id = gdt->sc_device;
p->sub_device_id = gdt->sc_subdevice;
break;
}
case GDT_IOCTL_OSVERS:
{
gdt_osv_t *p;
p = (gdt_osv_t *)cmdarg;
p->oscode = 10;
p->version = osrelease[0] - '0';
if (osrelease[1] == '.')
p->subversion = osrelease[2] - '0';
else
p->subversion = 0;
if (osrelease[3] == '.')
p->revision = osrelease[4] - '0';
else
p->revision = 0;
strcpy(p->name, ostype);
break;
}
case GDT_IOCTL_CTRCNT:
*(int *)cmdarg = gdt_cnt;
break;
case GDT_IOCTL_EVENT:
{
gdt_event_t *p;
int lock;
p = (gdt_event_t *)cmdarg;
if (p->erase == 0xff) {
if (p->dvr.event_source == GDT_ES_TEST)
p->dvr.event_data.size = sizeof(p->dvr.event_data.eu.test);
else if (p->dvr.event_source == GDT_ES_DRIVER)
p->dvr.event_data.size= sizeof(p->dvr.event_data.eu.driver);
else if (p->dvr.event_source == GDT_ES_SYNC)
p->dvr.event_data.size = sizeof(p->dvr.event_data.eu.sync);
else
p->dvr.event_data.size = sizeof(p->dvr.event_data.eu.async);
lock = splcam();
gdt_store_event(p->dvr.event_source, p->dvr.event_idx,
&p->dvr.event_data);
splx(lock);
} else if (p->erase == 0xfe) {
lock = splcam();
gdt_clear_events();
splx(lock);
} else if (p->erase == 0) {
p->handle = gdt_read_event(p->handle, &p->dvr);
} else {
gdt_readapp_event((u_int8_t)p->erase, &p->dvr);
}
break;
}
case GDT_IOCTL_STATIST:
{
gdt_statist_t *p;
p = (gdt_statist_t *)cmdarg;
bcopy(&gdt_stat, p, sizeof(gdt_statist_t));
break;
}
default:
break;
}
--gdt_stat.io_count_act;
return (0);
}
/*
static void
iir_drvinit(void *unused)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_drvinit()\n"));
if (!iir_devsw_installed) {
cdevsw_add(&iir_cdevsw);
iir_devsw_installed = 1;
}
}
SYSINIT(iir_dev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, iir_drvinit, NULL)
*/
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