The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/iir/iir_ctrl.c

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    1 /* $FreeBSD: stable/4/sys/dev/iir/iir_ctrl.c 145947 2005-05-06 02:33:46Z cperciva $ */
    2 /*
    3  *       Copyright (c) 2000-01 Intel Corporation
    4  *       All Rights Reserved
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions, and the following disclaimer,
   11  *    without modification, immediately at the beginning of the file.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The name of the author may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   22  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  */
   30 
   31 /*
   32  * iir_ctrl.c: Control functions and /dev entry points for /dev/iir*
   33  *
   34  * Written by: Achim Leubner <achim.leubner@intel.com>
   35  * Fixes/Additions: Boji Tony Kannanthanam <boji.t.kannanthanam@intel.com>
   36  *
   37  * TODO:     
   38  */
   39 
   40 #ident "$Id: iir_ctrl.c 1.2 2001/07/18 11:17:22 achim Exp $"
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/malloc.h>
   45 #include <sys/kernel.h>
   46 #include <sys/uio.h>
   47 #include <sys/conf.h>
   48 #include <sys/stat.h>
   49 #include <sys/disklabel.h>
   50 #include <machine/bus.h>
   51 #include <vm/vm.h>
   52 #include <vm/vm_kern.h>
   53 #include <vm/vm_extern.h>
   54 #include <vm/pmap.h>
   55 
   56 #include <dev/iir/iir.h>
   57 
   58 /* Entry points and other prototypes */
   59 static struct gdt_softc *gdt_minor2softc(int minor_no);
   60 
   61 static d_open_t         iir_open;
   62 static d_close_t        iir_close;
   63 static d_write_t        iir_write;
   64 static d_read_t         iir_read;
   65 static d_ioctl_t        iir_ioctl;
   66 
   67 #define CDEV_MAJOR          IIR_CDEV_MAJOR
   68 
   69 /* Normally, this is a static structure.  But we need it in pci/iir_pci.c */
   70 static struct cdevsw iir_cdevsw = {
   71         /* open */      iir_open,
   72         /* close */     iir_close,
   73         /* read */      iir_read,
   74         /* write */     iir_write,
   75         /* ioctl */     iir_ioctl,
   76         /* poll */      nopoll,
   77         /* mmap */      nommap,
   78         /* strategy */  nostrategy,
   79         /* name */      "iir",
   80         /* maj */       CDEV_MAJOR,
   81         /* dump */      nodump,
   82         /* psize */     nopsize,
   83         /* flags */     0,
   84         /* bmaj */      -1
   85 };
   86 
   87 static int iir_devsw_installed = 0;
   88 #ifndef SDEV_PER_HBA
   89 static int sdev_made = 0;
   90 #endif
   91 extern int gdt_cnt;
   92 extern char ostype[];
   93 extern char osrelease[];
   94 extern gdt_statist_t gdt_stat;
   95 
   96 /*
   97  * Given a controller number,
   98  * make a special device and return the dev_t
   99  */
  100 dev_t 
  101 gdt_make_dev(int unit)
  102 {
  103     dev_t dev;
  104 
  105 #ifdef SDEV_PER_HBA
  106     dev = make_dev(&iir_cdevsw, hba2minor(unit), UID_ROOT, GID_OPERATOR,
  107                    S_IRUSR | S_IWUSR, "iir%d", unit);
  108 #else
  109     if (sdev_made)
  110         return (0);
  111     dev = make_dev(&iir_cdevsw, 0, UID_ROOT, GID_OPERATOR,
  112                    S_IRUSR | S_IWUSR, "iir");
  113     sdev_made = 1;
  114 #endif
  115     return (dev);
  116 }
  117 
  118 void
  119 gdt_destroy_dev(dev_t dev)
  120 {
  121     if (dev != NULL)
  122         destroy_dev(dev);
  123 }
  124 
  125 /*
  126  * Given a minor device number,
  127  * return the pointer to its softc structure
  128  */
  129 static struct gdt_softc *
  130 gdt_minor2softc(int minor_no)
  131 {
  132     struct gdt_softc *gdt;
  133     int hanum;
  134 
  135 #ifdef SDEV_PER_HBA
  136     hanum = minor2hba(minor_no);
  137 #else
  138     hanum = minor_no;
  139 #endif
  140 
  141     for (gdt = TAILQ_FIRST(&gdt_softcs);
  142          gdt != NULL && gdt->sc_hanum != hanum;
  143          gdt = TAILQ_NEXT(gdt, links));
  144 
  145     return (gdt);
  146 }
  147 
  148 static int
  149 iir_open(dev_t dev, int flags, int fmt, d_thread_t * p)
  150 {
  151     GDT_DPRINTF(GDT_D_DEBUG, ("iir_open()\n"));
  152 
  153 #ifdef SDEV_PER_HBA
  154     int minor_no;
  155     struct gdt_softc *gdt;
  156 
  157     minor_no = minor(dev);
  158     gdt = gdt_minor2softc(minor_no);
  159     if (gdt == NULL)
  160         return (ENXIO);
  161 #endif
  162                 
  163     return (0);
  164 }
  165 
  166 static int
  167 iir_close(dev_t dev, int flags, int fmt, d_thread_t * p)
  168 {
  169     GDT_DPRINTF(GDT_D_DEBUG, ("iir_close()\n"));
  170                 
  171 #ifdef SDEV_PER_HBA
  172     int minor_no;
  173     struct gdt_softc *gdt;
  174 
  175     minor_no = minor(dev);
  176     gdt = gdt_minor2softc(minor_no);
  177     if (gdt == NULL)
  178         return (ENXIO);
  179 #endif
  180 
  181     return (0);
  182 }
  183 
  184 static int
  185 iir_write(dev_t dev, struct uio * uio, int ioflag)
  186 {
  187     GDT_DPRINTF(GDT_D_DEBUG, ("iir_write()\n"));
  188                 
  189 #ifdef SDEV_PER_HBA
  190     int minor_no;
  191     struct gdt_softc *gdt;
  192 
  193     minor_no = minor(dev);
  194     gdt = gdt_minor2softc(minor_no);
  195     if (gdt == NULL)
  196         return (ENXIO);
  197 #endif
  198 
  199     return (0);
  200 }
  201 
  202 static int
  203 iir_read(dev_t dev, struct uio * uio, int ioflag)
  204 {
  205     GDT_DPRINTF(GDT_D_DEBUG, ("iir_read()\n"));
  206                 
  207 #ifdef SDEV_PER_HBA
  208     int minor_no;
  209     struct gdt_softc *gdt;
  210 
  211     minor_no = minor(dev);
  212     gdt = gdt_minor2softc(minor_no);
  213     if (gdt == NULL)
  214         return (ENXIO);
  215 #endif
  216 
  217     return (0);
  218 }
  219 
  220 /**
  221  * This is the control syscall interface.
  222  * It should be binary compatible with UnixWare,
  223  * if not totally syntatically so.
  224  */
  225 
  226 static int
  227 iir_ioctl(dev_t dev, u_long cmd, caddr_t cmdarg, int flags, d_thread_t * p)
  228 {
  229     GDT_DPRINTF(GDT_D_DEBUG, ("iir_ioctl() cmd 0x%lx\n",cmd));
  230 
  231 #ifdef SDEV_PER_HBA
  232     int minor_no;
  233     struct gdt_softc *gdt;
  234 
  235     minor_no = minor(dev);
  236     gdt = gdt_minor2softc(minor_no);
  237     if (gdt == NULL)
  238         return (ENXIO);
  239 #endif
  240     ++gdt_stat.io_count_act;
  241     if (gdt_stat.io_count_act > gdt_stat.io_count_max)
  242         gdt_stat.io_count_max = gdt_stat.io_count_act;
  243 
  244     switch (cmd) {
  245       case GDT_IOCTL_GENERAL:
  246         {
  247             gdt_ucmd_t *ucmd;
  248             struct gdt_softc *gdt;
  249             int lock;
  250 
  251             ucmd = (gdt_ucmd_t *)cmdarg;
  252             gdt = gdt_minor2softc(ucmd->io_node);
  253             if (gdt == NULL)
  254                 return (ENXIO);
  255             lock = splcam();
  256             TAILQ_INSERT_TAIL(&gdt->sc_ucmd_queue, ucmd, links);
  257             ucmd->complete_flag = FALSE;
  258             splx(lock);
  259             gdt_next(gdt);
  260             if (!ucmd->complete_flag)
  261                 (void) tsleep((void *)ucmd, PCATCH | PRIBIO, "iirucw", 0);
  262             break;
  263         }
  264 
  265       case GDT_IOCTL_DRVERS:
  266         *(int *)cmdarg = 
  267             (IIR_DRIVER_VERSION << 8) | IIR_DRIVER_SUBVERSION;
  268         break;
  269 
  270       case GDT_IOCTL_CTRTYPE:
  271         {
  272             gdt_ctrt_t *p;
  273             struct gdt_softc *gdt; 
  274             
  275             p = (gdt_ctrt_t *)cmdarg;
  276             gdt = gdt_minor2softc(p->io_node);
  277             if (gdt == NULL)
  278                 return (ENXIO);
  279             p->oem_id = 0x8000;
  280             p->type = 0xfd;
  281             p->info = (gdt->sc_bus << 8) | (gdt->sc_slot << 3);
  282             p->ext_type = 0x6000 | gdt->sc_subdevice;
  283             p->device_id = gdt->sc_device;
  284             p->sub_device_id = gdt->sc_subdevice;
  285             break;
  286         }
  287 
  288       case GDT_IOCTL_OSVERS:
  289         {
  290             gdt_osv_t *p;
  291 
  292             p = (gdt_osv_t *)cmdarg;
  293             p->oscode = 10;
  294             p->version = osrelease[0] - '';
  295             if (osrelease[1] == '.')
  296                 p->subversion = osrelease[2] - '';
  297             else
  298                 p->subversion = 0;
  299             if (osrelease[3] == '.')
  300                 p->revision = osrelease[4] - '';
  301             else
  302                 p->revision = 0;
  303             strcpy(p->name, ostype);
  304             break;
  305         }
  306 
  307       case GDT_IOCTL_CTRCNT:
  308         *(int *)cmdarg = gdt_cnt;
  309         break;
  310 
  311       case GDT_IOCTL_EVENT:
  312         {
  313             gdt_event_t *p;
  314             int lock;
  315 
  316             p = (gdt_event_t *)cmdarg;
  317             if (p->erase == 0xff) {
  318                 if (p->dvr.event_source == GDT_ES_TEST)
  319                     p->dvr.event_data.size = sizeof(p->dvr.event_data.eu.test);
  320                 else if (p->dvr.event_source == GDT_ES_DRIVER)
  321                     p->dvr.event_data.size= sizeof(p->dvr.event_data.eu.driver);
  322                 else if (p->dvr.event_source == GDT_ES_SYNC)
  323                     p->dvr.event_data.size = sizeof(p->dvr.event_data.eu.sync);
  324                 else
  325                     p->dvr.event_data.size = sizeof(p->dvr.event_data.eu.async);
  326                 lock = splcam();
  327                 gdt_store_event(p->dvr.event_source, p->dvr.event_idx,
  328                                 &p->dvr.event_data);
  329                 splx(lock);
  330             } else if (p->erase == 0xfe) {
  331                 lock = splcam();
  332                 gdt_clear_events();
  333                 splx(lock);
  334             } else if (p->erase == 0) {
  335                 p->handle = gdt_read_event(p->handle, &p->dvr);
  336             } else {
  337                 gdt_readapp_event((u_int8_t)p->erase, &p->dvr);
  338             }
  339             break;
  340         }
  341         
  342       case GDT_IOCTL_STATIST:
  343         {
  344             gdt_statist_t *p;
  345             
  346             p = (gdt_statist_t *)cmdarg;
  347             bcopy(&gdt_stat, p, sizeof(gdt_statist_t));
  348             break;
  349         }
  350 
  351       default:
  352         break;
  353     }
  354 
  355     --gdt_stat.io_count_act;
  356     return (0);
  357 }
  358 
  359 static void
  360 iir_drvinit(void *unused)
  361 {
  362     GDT_DPRINTF(GDT_D_DEBUG, ("iir_drvinit()\n"));
  363                 
  364     if (!iir_devsw_installed) {
  365         /* Add the I/O (data) channel */
  366         cdevsw_add(&iir_cdevsw);
  367         iir_devsw_installed = 1;
  368     }
  369 }
  370 
  371 SYSINIT(iir_dev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE + CDEV_MAJOR, iir_drvinit, NULL)

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