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freebsd-skq/sys/dev/iir/iir_ctrl.c
jhb 1c95a6b2b4 Lock iir(4) and mark it MPSAFE. 
- Add a per-device mutex to the softc and use it for bus_dma tags,
  CAM SIMs, callouts, and interrupt handler.
- Switch from timeout(9) to callout(9).
- Add a separate global mutex to protect the global event buffer ring.
- Return completed index from iir_intr_locked() and remove the global
  gdt_wait_* variables.
- Remove global list of gdt softcs and replace its use with
  devclass_get_device().
- Use si_drv1 to store softc pointer in the SDEV_PER_HBA case instead
  of minor numbers.
- Do math on osreldate instead of dubious char math on osrelease[]
  that didn't work on 10.0+.
- Use bus_*() instead of bus_space_*().
- Use device_printf() instead of printf() with a unit number.

Tested by:	no one
2014-11-13 22:00:18 +00:00

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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/bus.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 <sys/sysctl.h>
#include <sys/sx.h>
#include <machine/bus.h>
#include <dev/iir/iir.h>
/* Entry points and other prototypes */
static struct gdt_softc *gdt_minor2softc(struct cdev *dev, 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_open = iir_open,
.d_close = iir_close,
.d_read = iir_read,
.d_write = iir_write,
.d_ioctl = iir_ioctl,
.d_name = "iir",
};
#ifndef SDEV_PER_HBA
static int sdev_made = 0;
static struct sx sdev_lock;
SX_SYSINIT(iir_sdev_lock, &sdev_lock, "iir sdev");
#endif
extern int gdt_cnt;
extern gdt_statist_t gdt_stat;
/*
* Given a controller number,
* make a special device and return the dev_t
*/
struct cdev *
gdt_make_dev(struct gdt_softc *gdt)
{
struct cdev *dev;
#ifdef SDEV_PER_HBA
dev = make_dev(&iir_cdevsw, 0, UID_ROOT, GID_OPERATOR,
S_IRUSR | S_IWUSR, "iir%d", unit);
dev->si_drv1 = gdt;
#else
sx_xlock(&sdev_lock);
if (sdev_made)
return (NULL);
dev = make_dev(&iir_cdevsw, 0, UID_ROOT, GID_OPERATOR,
S_IRUSR | S_IWUSR, "iir");
sdev_made = 1;
sx_xunlock(&sdev_lock);
#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(struct cdev *dev, int minor_no)
{
#ifdef SDEV_PER_HBA
return (dev->si_drv1);
#else
devclass_t dc;
device_t child;
dc = devclass_find("iir");
if (dc == NULL)
return (NULL);
child = devclass_get_device(dc, minor_no);
if (child == NULL)
return (NULL);
return (device_get_softc(child));
#endif
}
static int
iir_open(struct cdev *dev, int flags, int fmt, struct thread * p)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_open()\n"));
return (0);
}
static int
iir_close(struct cdev *dev, int flags, int fmt, struct thread * p)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_close()\n"));
return (0);
}
static int
iir_write(struct cdev *dev, struct uio * uio, int ioflag)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_write()\n"));
return (0);
}
static int
iir_read(struct cdev *dev, struct uio * uio, int ioflag)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_read()\n"));
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, struct thread * p)
{
GDT_DPRINTF(GDT_D_DEBUG, ("iir_ioctl() cmd 0x%lx\n",cmd));
++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;
ucmd = (gdt_ucmd_t *)cmdarg;
gdt = gdt_minor2softc(dev, ucmd->io_node);
if (gdt == NULL)
return (ENXIO);
mtx_lock(&gdt->sc_lock);
TAILQ_INSERT_TAIL(&gdt->sc_ucmd_queue, ucmd, links);
ucmd->complete_flag = FALSE;
gdt_next(gdt);
if (!ucmd->complete_flag)
(void) mtx_sleep(ucmd, &gdt->sc_lock, PCATCH | PRIBIO, "iirucw",
0);
mtx_unlock(&gdt->sc_lock);
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(dev, 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_IIR) {
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 = osreldate / 100000;
p->subversion = osreldate / 1000 % 100;
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;
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);
gdt_store_event(p->dvr.event_source, p->dvr.event_idx,
&p->dvr.event_data);
} else if (p->erase == 0xfe) {
gdt_clear_events();
} 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);
}
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