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: releng/5.0/sys/dev/iir/iir_ctrl.c 109045 2003-01-10 05:18:09Z rwatson $ */
    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/endian.h>
   45 #include <sys/malloc.h>
   46 #include <sys/kernel.h>
   47 #include <sys/uio.h>
   48 #include <sys/conf.h>
   49 #include <sys/stat.h>
   50 #include <sys/ioccom.h>
   51 #include <machine/bus.h>
   52 #include <vm/vm.h>
   53 #include <vm/vm_kern.h>
   54 #include <vm/vm_extern.h>
   55 #include <vm/pmap.h>
   56 
   57 #include <dev/iir/iir.h>
   58 
   59 /* Entry points and other prototypes */
   60 static struct gdt_softc *gdt_minor2softc(int minor_no);
   61 
   62 static d_open_t         iir_open;
   63 static d_close_t        iir_close;
   64 static d_write_t        iir_write;
   65 static d_read_t         iir_read;
   66 static d_ioctl_t        iir_ioctl;
   67 
   68 #define CDEV_MAJOR          IIR_CDEV_MAJOR
   69 
   70 /* Normally, this is a static structure.  But we need it in pci/iir_pci.c */
   71 static struct cdevsw iir_cdevsw = {
   72         /* open */      iir_open,
   73         /* close */     iir_close,
   74         /* read */      iir_read,
   75         /* write */     iir_write,
   76         /* ioctl */     iir_ioctl,
   77         /* poll */      nopoll,
   78         /* mmap */      nommap,
   79         /* strategy */  nostrategy,
   80         /* name */      "iir",
   81         /* maj */       CDEV_MAJOR,
   82         /* dump */      nodump,
   83         /* psize */     nopsize,
   84         /* flags */     0,
   85         /* kq */        nokqfilter
   86 };
   87 
   88 static int iir_devsw_installed = 0;
   89 #ifndef SDEV_PER_HBA
   90 static int sdev_made = 0;
   91 #endif
   92 extern int gdt_cnt;
   93 extern char ostype[];
   94 extern char osrelease[];
   95 extern gdt_statist_t gdt_stat;
   96 
   97 /*
   98  * Given a controller number,
   99  * make a special device and return the dev_t
  100  */
  101 dev_t 
  102 gdt_make_dev(int unit)
  103 {
  104     dev_t dev;
  105 
  106 #ifdef SDEV_PER_HBA
  107     dev = make_dev(&iir_cdevsw, hba2minor(unit), UID_ROOT, GID_OPERATOR,
  108                    S_IRUSR | S_IWUSR | S_IRGRP, "iir%d", unit);
  109 #else
  110     if (sdev_made)
  111         return (0);
  112     dev = make_dev(&iir_cdevsw, 0, UID_ROOT, GID_OPERATOR,
  113                    S_IRUSR | S_IWUSR | S_IRGRP, "iir");
  114     sdev_made = 1;
  115 #endif
  116     return (dev);
  117 }
  118 
  119 void
  120 gdt_destroy_dev(dev_t dev)
  121 {
  122     if (dev != NULL)
  123         destroy_dev(dev);
  124 }
  125 
  126 /*
  127  * Given a minor device number,
  128  * return the pointer to its softc structure
  129  */
  130 static struct gdt_softc *
  131 gdt_minor2softc(int minor_no)
  132 {
  133     struct gdt_softc *gdt;
  134     int hanum;
  135 
  136 #ifdef SDEV_PER_HBA
  137     hanum = minor2hba(minor_no);
  138 #else
  139     hanum = minor_no;
  140 #endif
  141 
  142     for (gdt = TAILQ_FIRST(&gdt_softcs);
  143          gdt != NULL && gdt->sc_hanum != hanum;
  144          gdt = TAILQ_NEXT(gdt, links));
  145 
  146     return (gdt);
  147 }
  148 
  149 static int
  150 iir_open(dev_t dev, int flags, int fmt, d_thread_t * p)
  151 {
  152     GDT_DPRINTF(GDT_D_DEBUG, ("iir_open()\n"));
  153 
  154 #ifdef SDEV_PER_HBA
  155     int minor_no;
  156     struct gdt_softc *gdt;
  157 
  158     minor_no = minor(dev);
  159     gdt = gdt_minor2softc(minor_no);
  160     if (gdt == NULL)
  161         return (ENXIO);
  162 #endif
  163                 
  164     return (0);
  165 }
  166 
  167 static int
  168 iir_close(dev_t dev, int flags, int fmt, d_thread_t * p)
  169 {
  170     GDT_DPRINTF(GDT_D_DEBUG, ("iir_close()\n"));
  171                 
  172 #ifdef SDEV_PER_HBA
  173     int minor_no;
  174     struct gdt_softc *gdt;
  175 
  176     minor_no = minor(dev);
  177     gdt = gdt_minor2softc(minor_no);
  178     if (gdt == NULL)
  179         return (ENXIO);
  180 #endif
  181 
  182     return (0);
  183 }
  184 
  185 static int
  186 iir_write(dev_t dev, struct uio * uio, int ioflag)
  187 {
  188     GDT_DPRINTF(GDT_D_DEBUG, ("iir_write()\n"));
  189                 
  190 #ifdef SDEV_PER_HBA
  191     int minor_no;
  192     struct gdt_softc *gdt;
  193 
  194     minor_no = minor(dev);
  195     gdt = gdt_minor2softc(minor_no);
  196     if (gdt == NULL)
  197         return (ENXIO);
  198 #endif
  199 
  200     return (0);
  201 }
  202 
  203 static int
  204 iir_read(dev_t dev, struct uio * uio, int ioflag)
  205 {
  206     GDT_DPRINTF(GDT_D_DEBUG, ("iir_read()\n"));
  207                 
  208 #ifdef SDEV_PER_HBA
  209     int minor_no;
  210     struct gdt_softc *gdt;
  211 
  212     minor_no = minor(dev);
  213     gdt = gdt_minor2softc(minor_no);
  214     if (gdt == NULL)
  215         return (ENXIO);
  216 #endif
  217 
  218     return (0);
  219 }
  220 
  221 /**
  222  * This is the control syscall interface.
  223  * It should be binary compatible with UnixWare,
  224  * if not totally syntatically so.
  225  */
  226 
  227 static int
  228 iir_ioctl(dev_t dev, u_long cmd, caddr_t cmdarg, int flags, d_thread_t * p)
  229 {
  230     GDT_DPRINTF(GDT_D_DEBUG, ("iir_ioctl() cmd 0x%lx\n",cmd));
  231 
  232 #ifdef SDEV_PER_HBA
  233     int minor_no;
  234     struct gdt_softc *gdt;
  235 
  236     minor_no = minor(dev);
  237     gdt = gdt_minor2softc(minor_no);
  238     if (gdt == NULL)
  239         return (ENXIO);
  240 #endif
  241     ++gdt_stat.io_count_act;
  242     if (gdt_stat.io_count_act > gdt_stat.io_count_max)
  243         gdt_stat.io_count_max = gdt_stat.io_count_act;
  244 
  245     switch (cmd) {
  246       case GDT_IOCTL_GENERAL:
  247         {
  248             gdt_ucmd_t *ucmd;
  249             struct gdt_softc *gdt;
  250             int lock;
  251 
  252             ucmd = (gdt_ucmd_t *)cmdarg;
  253             gdt = gdt_minor2softc(ucmd->io_node);
  254             if (gdt == NULL)
  255                 return (ENXIO);
  256             lock = splcam();
  257             TAILQ_INSERT_TAIL(&gdt->sc_ucmd_queue, ucmd, links);
  258             ucmd->complete_flag = FALSE;
  259             splx(lock);
  260             gdt_next(gdt);
  261             if (!ucmd->complete_flag)
  262                 (void) tsleep((void *)ucmd, PCATCH | PRIBIO, "iirucw", 0);
  263             break;
  264         }
  265 
  266       case GDT_IOCTL_DRVERS:
  267         *(int *)cmdarg = 
  268             (IIR_DRIVER_VERSION << 8) | IIR_DRIVER_SUBVERSION;
  269         break;
  270 
  271       case GDT_IOCTL_CTRTYPE:
  272         {
  273             gdt_ctrt_t *p;
  274             struct gdt_softc *gdt; 
  275             
  276             p = (gdt_ctrt_t *)cmdarg;
  277             gdt = gdt_minor2softc(p->io_node);
  278             if (gdt == NULL)
  279                 return (ENXIO);
  280             p->oem_id = 0x8000;
  281             p->type = 0xfd;
  282             p->info = (gdt->sc_bus << 8) | (gdt->sc_slot << 3);
  283             p->ext_type = 0x6000 | gdt->sc_subdevice;
  284             p->device_id = gdt->sc_device;
  285             p->sub_device_id = gdt->sc_subdevice;
  286             break;
  287         }
  288 
  289       case GDT_IOCTL_OSVERS:
  290         {
  291             gdt_osv_t *p;
  292 
  293             p = (gdt_osv_t *)cmdarg;
  294             p->oscode = 10;
  295             p->version = osrelease[0] - '';
  296             if (osrelease[1] == '.')
  297                 p->subversion = osrelease[2] - '';
  298             else
  299                 p->subversion = 0;
  300             if (osrelease[3] == '.')
  301                 p->revision = osrelease[4] - '';
  302             else
  303                 p->revision = 0;
  304             strcpy(p->name, ostype);
  305             break;
  306         }
  307 
  308       case GDT_IOCTL_CTRCNT:
  309         *(int *)cmdarg = gdt_cnt;
  310         break;
  311 
  312       case GDT_IOCTL_EVENT:
  313         {
  314             gdt_event_t *p;
  315             int lock;
  316 
  317             p = (gdt_event_t *)cmdarg;
  318             if (p->erase == 0xff) {
  319                 if (p->dvr.event_source == GDT_ES_TEST)
  320                     p->dvr.event_data.size = sizeof(p->dvr.event_data.eu.test);
  321                 else if (p->dvr.event_source == GDT_ES_DRIVER)
  322                     p->dvr.event_data.size= sizeof(p->dvr.event_data.eu.driver);
  323                 else if (p->dvr.event_source == GDT_ES_SYNC)
  324                     p->dvr.event_data.size = sizeof(p->dvr.event_data.eu.sync);
  325                 else
  326                     p->dvr.event_data.size = sizeof(p->dvr.event_data.eu.async);
  327                 lock = splcam();
  328                 gdt_store_event(p->dvr.event_source, p->dvr.event_idx,
  329                                 &p->dvr.event_data);
  330                 splx(lock);
  331             } else if (p->erase == 0xfe) {
  332                 lock = splcam();
  333                 gdt_clear_events();
  334                 splx(lock);
  335             } else if (p->erase == 0) {
  336                 p->handle = gdt_read_event(p->handle, &p->dvr);
  337             } else {
  338                 gdt_readapp_event((u_int8_t)p->erase, &p->dvr);
  339             }
  340             break;
  341         }
  342         
  343       case GDT_IOCTL_STATIST:
  344         {
  345             gdt_statist_t *p;
  346             
  347             p = (gdt_statist_t *)cmdarg;
  348             bcopy(&gdt_stat, p, sizeof(gdt_statist_t));
  349             break;
  350         }
  351 
  352       default:
  353         break;
  354     }
  355 
  356     --gdt_stat.io_count_act;
  357     return (0);
  358 }
  359 
  360 static void
  361 iir_drvinit(void *unused)
  362 {
  363     GDT_DPRINTF(GDT_D_DEBUG, ("iir_drvinit()\n"));
  364                 
  365     if (!iir_devsw_installed) {
  366         /* Add the I/O (data) channel */
  367         cdevsw_add(&iir_cdevsw);
  368         iir_devsw_installed = 1;
  369     }
  370 }
  371 
  372 SYSINIT(iir_dev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE + CDEV_MAJOR, iir_drvinit, NULL)

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