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.c

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    1 /*-
    2  *       Copyright (c) 2000-04 ICP vortex GmbH
    3  *       Copyright (c) 2002-04 Intel Corporation
    4  *       Copyright (c) 2003-04 Adaptec Inc.
    5  *       All Rights Reserved
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions, and the following disclaimer,
   12  *    without modification, immediately at the beginning of the file.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. The name of the author may not be used to endorse or promote products
   17  *    derived from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 /*
   33  * iir.c: SCSI dependant code for the Intel Integrated RAID Controller driver
   34  *
   35  * Written by: Achim Leubner <achim_leubner@adaptec.com>
   36  * Fixes/Additions: Boji Tony Kannanthanam <boji.t.kannanthanam@intel.com>
   37  *
   38  * credits:     Niklas Hallqvist;       OpenBSD driver for the ICP Controllers.
   39  *              Mike Smith;             Some driver source code.
   40  *              FreeBSD.ORG;            Great O/S to work on and for.
   41  *
   42  * $Id: iir.c 1.5 2004/03/30 10:17:53 achim Exp $"
   43  */
   44 
   45 #include <sys/cdefs.h>
   46 __FBSDID("$FreeBSD: releng/10.1/sys/dev/iir/iir.c 255871 2013-09-25 17:16:21Z scottl $");
   47 
   48 #define _IIR_C_
   49 
   50 /* #include "opt_iir.h" */
   51 #include <sys/param.h>
   52 #include <sys/systm.h>
   53 #include <sys/endian.h>
   54 #include <sys/eventhandler.h>
   55 #include <sys/malloc.h>
   56 #include <sys/kernel.h>
   57 #include <sys/bus.h>
   58 
   59 #include <machine/bus.h>
   60 #include <machine/stdarg.h>
   61 
   62 #include <cam/cam.h>
   63 #include <cam/cam_ccb.h>
   64 #include <cam/cam_sim.h>
   65 #include <cam/cam_xpt_sim.h>
   66 #include <cam/cam_debug.h>
   67 #include <cam/scsi/scsi_all.h>
   68 #include <cam/scsi/scsi_message.h>
   69 
   70 #include <dev/iir/iir.h>
   71 
   72 static MALLOC_DEFINE(M_GDTBUF, "iirbuf", "iir driver buffer");
   73 
   74 struct gdt_softc *gdt_wait_gdt;
   75 int     gdt_wait_index;
   76 
   77 #ifdef GDT_DEBUG
   78 int     gdt_debug = GDT_DEBUG;
   79 #ifdef __SERIAL__
   80 #define MAX_SERBUF 160
   81 static void ser_init(void);
   82 static void ser_puts(char *str);
   83 static void ser_putc(int c);
   84 static char strbuf[MAX_SERBUF+1];
   85 #ifdef __COM2__
   86 #define COM_BASE 0x2f8
   87 #else
   88 #define COM_BASE 0x3f8
   89 #endif
   90 static void ser_init()
   91 {
   92     unsigned port=COM_BASE;
   93 
   94     outb(port+3, 0x80);
   95     outb(port+1, 0);
   96     /* 19200 Baud, if 9600: outb(12,port) */
   97     outb(port, 6);
   98     outb(port+3, 3);
   99     outb(port+1, 0);
  100 }
  101 
  102 static void ser_puts(char *str)
  103 {
  104     char *ptr;
  105 
  106     ser_init();
  107     for (ptr=str;*ptr;++ptr)
  108         ser_putc((int)(*ptr));
  109 }
  110 
  111 static void ser_putc(int c)
  112 {
  113     unsigned port=COM_BASE;
  114 
  115     while ((inb(port+5) & 0x20)==0);
  116     outb(port, c);
  117     if (c==0x0a)
  118     {
  119         while ((inb(port+5) & 0x20)==0);
  120         outb(port, 0x0d);
  121     }
  122 }
  123 
  124 int ser_printf(const char *fmt, ...)
  125 {
  126     va_list args;
  127     int i;
  128 
  129     va_start(args,fmt);
  130     i = vsprintf(strbuf,fmt,args);
  131     ser_puts(strbuf);
  132     va_end(args);
  133     return i;
  134 }
  135 #endif
  136 #endif
  137 
  138 /* The linked list of softc structures */
  139 struct gdt_softc_list gdt_softcs = TAILQ_HEAD_INITIALIZER(gdt_softcs);
  140 /* controller cnt. */
  141 int gdt_cnt = 0;
  142 /* event buffer */
  143 static gdt_evt_str ebuffer[GDT_MAX_EVENTS];
  144 static int elastidx, eoldidx;
  145 /* statistics */
  146 gdt_statist_t gdt_stat;
  147 
  148 /* Definitions for our use of the SIM private CCB area */
  149 #define ccb_sim_ptr     spriv_ptr0
  150 #define ccb_priority    spriv_field1
  151 
  152 static void     iir_action(struct cam_sim *sim, union ccb *ccb);
  153 static void     iir_poll(struct cam_sim *sim);
  154 static void     iir_shutdown(void *arg, int howto);
  155 static void     iir_timeout(void *arg);
  156 
  157 static void     gdt_eval_mapping(u_int32_t size, int *cyls, int *heads, 
  158                                  int *secs);
  159 static int      gdt_internal_cmd(struct gdt_softc *gdt, struct gdt_ccb *gccb, 
  160                                  u_int8_t service, u_int16_t opcode, 
  161                                  u_int32_t arg1, u_int32_t arg2, u_int32_t arg3);
  162 static int      gdt_wait(struct gdt_softc *gdt, struct gdt_ccb *ccb, 
  163                          int timeout);
  164 
  165 static struct gdt_ccb *gdt_get_ccb(struct gdt_softc *gdt);
  166 
  167 static int      gdt_sync_event(struct gdt_softc *gdt, int service, 
  168                                u_int8_t index, struct gdt_ccb *gccb);
  169 static int      gdt_async_event(struct gdt_softc *gdt, int service);
  170 static struct gdt_ccb *gdt_raw_cmd(struct gdt_softc *gdt, 
  171                                    union ccb *ccb, int *lock);
  172 static struct gdt_ccb *gdt_cache_cmd(struct gdt_softc *gdt, 
  173                                      union ccb *ccb, int *lock);
  174 static struct gdt_ccb *gdt_ioctl_cmd(struct gdt_softc *gdt, 
  175                                      gdt_ucmd_t *ucmd, int *lock);
  176 static void     gdt_internal_cache_cmd(struct gdt_softc *gdt,union ccb *ccb);
  177 
  178 static void     gdtmapmem(void *arg, bus_dma_segment_t *dm_segs,
  179                           int nseg, int error);
  180 static void     gdtexecuteccb(void *arg, bus_dma_segment_t *dm_segs,
  181                               int nseg, int error);
  182 
  183 int
  184 iir_init(struct gdt_softc *gdt)
  185 {
  186     u_int16_t cdev_cnt;
  187     int i, id, drv_cyls, drv_hds, drv_secs;
  188     struct gdt_ccb *gccb;
  189 
  190     GDT_DPRINTF(GDT_D_DEBUG, ("iir_init()\n"));
  191 
  192     gdt->sc_state = GDT_POLLING;
  193     gdt_clear_events(); 
  194     bzero(&gdt_stat, sizeof(gdt_statist_t));
  195 
  196     SLIST_INIT(&gdt->sc_free_gccb);
  197     SLIST_INIT(&gdt->sc_pending_gccb);
  198     TAILQ_INIT(&gdt->sc_ccb_queue);
  199     TAILQ_INIT(&gdt->sc_ucmd_queue);
  200     TAILQ_INSERT_TAIL(&gdt_softcs, gdt, links);
  201 
  202     /* DMA tag for mapping buffers into device visible space. */
  203     if (bus_dma_tag_create(gdt->sc_parent_dmat, /*alignment*/1, /*boundary*/0,
  204                            /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
  205                            /*highaddr*/BUS_SPACE_MAXADDR,
  206                            /*filter*/NULL, /*filterarg*/NULL,
  207                            /*maxsize*/MAXBSIZE, /*nsegments*/GDT_MAXSG,
  208                            /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
  209                            /*flags*/BUS_DMA_ALLOCNOW,
  210                            /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant,
  211                            &gdt->sc_buffer_dmat) != 0) {
  212         printf("iir%d: bus_dma_tag_create(...,gdt->sc_buffer_dmat) failed\n",
  213                gdt->sc_hanum);
  214         return (1);
  215     }
  216     gdt->sc_init_level++;
  217 
  218     /* DMA tag for our ccb structures */
  219     if (bus_dma_tag_create(gdt->sc_parent_dmat,
  220                            /*alignment*/1,
  221                            /*boundary*/0,
  222                            /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
  223                            /*highaddr*/BUS_SPACE_MAXADDR,
  224                            /*filter*/NULL,
  225                            /*filterarg*/NULL,
  226                            GDT_MAXCMDS * GDT_SCRATCH_SZ, /* maxsize */
  227                            /*nsegments*/1,
  228                            /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
  229                            /*flags*/0, /*lockfunc*/busdma_lock_mutex,
  230                            /*lockarg*/&Giant, &gdt->sc_gcscratch_dmat) != 0) {
  231         printf("iir%d: bus_dma_tag_create(...,gdt->sc_gcscratch_dmat) failed\n",
  232                gdt->sc_hanum);
  233         return (1);
  234     }
  235     gdt->sc_init_level++;
  236 
  237     /* Allocation for our ccb scratch area */
  238     if (bus_dmamem_alloc(gdt->sc_gcscratch_dmat, (void **)&gdt->sc_gcscratch,
  239                          BUS_DMA_NOWAIT, &gdt->sc_gcscratch_dmamap) != 0) {
  240         printf("iir%d: bus_dmamem_alloc(...,&gdt->sc_gccbs,...) failed\n",
  241                gdt->sc_hanum);
  242         return (1);
  243     }
  244     gdt->sc_init_level++;
  245 
  246     /* And permanently map them */
  247     bus_dmamap_load(gdt->sc_gcscratch_dmat, gdt->sc_gcscratch_dmamap,
  248                     gdt->sc_gcscratch, GDT_MAXCMDS * GDT_SCRATCH_SZ,
  249                     gdtmapmem, &gdt->sc_gcscratch_busbase, /*flags*/0);
  250     gdt->sc_init_level++;
  251 
  252     /* Clear them out. */
  253     bzero(gdt->sc_gcscratch, GDT_MAXCMDS * GDT_SCRATCH_SZ);
  254 
  255     /* Initialize the ccbs */
  256     gdt->sc_gccbs = malloc(sizeof(struct gdt_ccb) * GDT_MAXCMDS, M_GDTBUF,
  257         M_NOWAIT | M_ZERO);
  258     if (gdt->sc_gccbs == NULL) {
  259         printf("iir%d: no memory for gccbs.\n", gdt->sc_hanum);
  260         return (1);
  261     }
  262     for (i = GDT_MAXCMDS-1; i >= 0; i--) {
  263         gccb = &gdt->sc_gccbs[i];
  264         gccb->gc_cmd_index = i + 2;
  265         gccb->gc_flags = GDT_GCF_UNUSED;
  266         gccb->gc_map_flag = FALSE;
  267         if (bus_dmamap_create(gdt->sc_buffer_dmat, /*flags*/0,
  268                               &gccb->gc_dmamap) != 0)
  269             return(1);
  270         gccb->gc_map_flag = TRUE;
  271         gccb->gc_scratch = &gdt->sc_gcscratch[GDT_SCRATCH_SZ * i];
  272         gccb->gc_scratch_busbase = gdt->sc_gcscratch_busbase + GDT_SCRATCH_SZ * i;
  273         callout_handle_init(&gccb->gc_timeout_ch);
  274         SLIST_INSERT_HEAD(&gdt->sc_free_gccb, gccb, sle);
  275     }
  276     gdt->sc_init_level++;
  277 
  278     /* create the control device */
  279     gdt->sc_dev = gdt_make_dev(gdt->sc_hanum);
  280 
  281     /* allocate ccb for gdt_internal_cmd() */
  282     gccb = gdt_get_ccb(gdt);
  283     if (gccb == NULL) {
  284         printf("iir%d: No free command index found\n",
  285                gdt->sc_hanum);
  286         return (1);
  287     }
  288     bzero(gccb->gc_cmd, GDT_CMD_SZ);
  289 
  290     if (!gdt_internal_cmd(gdt, gccb, GDT_SCREENSERVICE, GDT_INIT, 
  291                           0, 0, 0)) {
  292         printf("iir%d: Screen service initialization error %d\n",
  293                gdt->sc_hanum, gdt->sc_status);
  294         gdt_free_ccb(gdt, gccb);
  295         return (1);
  296     }
  297 
  298     gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_UNFREEZE_IO,
  299                      0, 0, 0);
  300 
  301     if (!gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_INIT, 
  302                           GDT_LINUX_OS, 0, 0)) {
  303         printf("iir%d: Cache service initialization error %d\n",
  304                gdt->sc_hanum, gdt->sc_status);
  305         gdt_free_ccb(gdt, gccb);
  306         return (1);
  307     }
  308     cdev_cnt = (u_int16_t)gdt->sc_info;
  309     gdt->sc_fw_vers = gdt->sc_service;
  310 
  311     /* Detect number of buses */
  312     gdt_enc32(gccb->gc_scratch + GDT_IOC_VERSION, GDT_IOC_NEWEST);
  313     gccb->gc_scratch[GDT_IOC_LIST_ENTRIES] = GDT_MAXBUS;
  314     gccb->gc_scratch[GDT_IOC_FIRST_CHAN] = 0;
  315     gccb->gc_scratch[GDT_IOC_LAST_CHAN] = GDT_MAXBUS - 1;
  316     gdt_enc32(gccb->gc_scratch + GDT_IOC_LIST_OFFSET, GDT_IOC_HDR_SZ);
  317     if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_IOCTL,
  318                          GDT_IOCHAN_RAW_DESC, GDT_INVALID_CHANNEL,
  319                          GDT_IOC_HDR_SZ + GDT_MAXBUS * GDT_RAWIOC_SZ)) {
  320         gdt->sc_bus_cnt = gccb->gc_scratch[GDT_IOC_CHAN_COUNT];
  321         for (i = 0; i < gdt->sc_bus_cnt; i++) {
  322             id = gccb->gc_scratch[GDT_IOC_HDR_SZ +
  323                                  i * GDT_RAWIOC_SZ + GDT_RAWIOC_PROC_ID];
  324             gdt->sc_bus_id[i] = id < GDT_MAXID_FC ? id : 0xff;
  325         }
  326     } else {
  327         /* New method failed, use fallback. */
  328         for (i = 0; i < GDT_MAXBUS; i++) {
  329             gdt_enc32(gccb->gc_scratch + GDT_GETCH_CHANNEL_NO, i);
  330             if (!gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_IOCTL,
  331                                   GDT_SCSI_CHAN_CNT | GDT_L_CTRL_PATTERN,
  332                                   GDT_IO_CHANNEL | GDT_INVALID_CHANNEL,
  333                                   GDT_GETCH_SZ)) {
  334                 if (i == 0) {
  335                     printf("iir%d: Cannot get channel count, "
  336                            "error %d\n", gdt->sc_hanum, gdt->sc_status);
  337                     gdt_free_ccb(gdt, gccb);
  338                     return (1);
  339                 }
  340                 break;
  341             }
  342             gdt->sc_bus_id[i] =
  343                 (gccb->gc_scratch[GDT_GETCH_SIOP_ID] < GDT_MAXID_FC) ?
  344                 gccb->gc_scratch[GDT_GETCH_SIOP_ID] : 0xff;
  345         }
  346         gdt->sc_bus_cnt = i;
  347     }
  348     /* add one "virtual" channel for the host drives */
  349     gdt->sc_virt_bus = gdt->sc_bus_cnt;
  350     gdt->sc_bus_cnt++;
  351 
  352     if (!gdt_internal_cmd(gdt, gccb, GDT_SCSIRAWSERVICE, GDT_INIT, 
  353                           0, 0, 0)) {
  354             printf("iir%d: Raw service initialization error %d\n",
  355                    gdt->sc_hanum, gdt->sc_status);
  356             gdt_free_ccb(gdt, gccb);
  357             return (1);
  358     }
  359 
  360     /* Set/get features raw service (scatter/gather) */
  361     gdt->sc_raw_feat = 0;
  362     if (gdt_internal_cmd(gdt, gccb, GDT_SCSIRAWSERVICE, GDT_SET_FEAT,
  363                          GDT_SCATTER_GATHER, 0, 0)) {
  364         if (gdt_internal_cmd(gdt, gccb, GDT_SCSIRAWSERVICE, GDT_GET_FEAT, 
  365                              0, 0, 0)) {
  366             gdt->sc_raw_feat = gdt->sc_info;
  367             if (!(gdt->sc_info & GDT_SCATTER_GATHER)) {
  368                 panic("iir%d: Scatter/Gather Raw Service "
  369                       "required but not supported!\n", gdt->sc_hanum);
  370                 gdt_free_ccb(gdt, gccb);
  371                 return (1);
  372             }
  373         }
  374     }
  375 
  376     /* Set/get features cache service (scatter/gather) */
  377     gdt->sc_cache_feat = 0;
  378     if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_SET_FEAT, 
  379                          0, GDT_SCATTER_GATHER, 0)) {
  380         if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_GET_FEAT, 
  381                              0, 0, 0)) {
  382             gdt->sc_cache_feat = gdt->sc_info;
  383             if (!(gdt->sc_info & GDT_SCATTER_GATHER)) {
  384                 panic("iir%d: Scatter/Gather Cache Service "
  385                   "required but not supported!\n", gdt->sc_hanum);
  386                 gdt_free_ccb(gdt, gccb);
  387                 return (1);
  388             }
  389         }
  390     }
  391 
  392     /* OEM */
  393     gdt_enc32(gccb->gc_scratch + GDT_OEM_VERSION, 0x01);
  394     gdt_enc32(gccb->gc_scratch + GDT_OEM_BUFSIZE, sizeof(gdt_oem_record_t));
  395     if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_IOCTL,
  396                          GDT_OEM_STR_RECORD, GDT_INVALID_CHANNEL,
  397                          sizeof(gdt_oem_str_record_t))) {
  398             strncpy(gdt->oem_name, ((gdt_oem_str_record_t *)
  399             gccb->gc_scratch)->text.scsi_host_drive_inquiry_vendor_id, 7);
  400                 gdt->oem_name[7]='\0';
  401         } else {
  402                 /* Old method, based on PCI ID */
  403                 if (gdt->sc_vendor == INTEL_VENDOR_ID_IIR)
  404             strcpy(gdt->oem_name,"Intel  ");
  405         else 
  406             strcpy(gdt->oem_name,"ICP    ");
  407     }
  408 
  409     /* Scan for cache devices */
  410     for (i = 0; i < cdev_cnt && i < GDT_MAX_HDRIVES; i++) {
  411         if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_INFO, 
  412                              i, 0, 0)) {
  413             gdt->sc_hdr[i].hd_present = 1;
  414             gdt->sc_hdr[i].hd_size = gdt->sc_info;
  415             
  416             /*
  417              * Evaluate mapping (sectors per head, heads per cyl)
  418              */
  419             gdt->sc_hdr[i].hd_size &= ~GDT_SECS32;
  420             if (gdt->sc_info2 == 0)
  421                 gdt_eval_mapping(gdt->sc_hdr[i].hd_size,
  422                                  &drv_cyls, &drv_hds, &drv_secs);
  423             else {
  424                 drv_hds = gdt->sc_info2 & 0xff;
  425                 drv_secs = (gdt->sc_info2 >> 8) & 0xff;
  426                 drv_cyls = gdt->sc_hdr[i].hd_size / drv_hds /
  427                     drv_secs;
  428             }
  429             gdt->sc_hdr[i].hd_heads = drv_hds;
  430             gdt->sc_hdr[i].hd_secs = drv_secs;
  431             /* Round the size */
  432             gdt->sc_hdr[i].hd_size = drv_cyls * drv_hds * drv_secs;
  433             
  434             if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE,
  435                                  GDT_DEVTYPE, i, 0, 0))
  436                 gdt->sc_hdr[i].hd_devtype = gdt->sc_info;
  437         }
  438     }
  439     
  440     GDT_DPRINTF(GDT_D_INIT, ("dpmem %x %d-bus %d cache device%s\n", 
  441                              gdt->sc_dpmembase,
  442                              gdt->sc_bus_cnt, cdev_cnt, 
  443                              cdev_cnt == 1 ? "" : "s"));
  444     gdt_free_ccb(gdt, gccb);
  445 
  446     gdt_cnt++;
  447     return (0);
  448 }
  449 
  450 void
  451 iir_free(struct gdt_softc *gdt)
  452 {
  453     int i;
  454 
  455     GDT_DPRINTF(GDT_D_INIT, ("iir_free()\n"));
  456 
  457     switch (gdt->sc_init_level) {
  458       default:
  459         gdt_destroy_dev(gdt->sc_dev);
  460       case 5:
  461         for (i = GDT_MAXCMDS-1; i >= 0; i--) 
  462             if (gdt->sc_gccbs[i].gc_map_flag)
  463                 bus_dmamap_destroy(gdt->sc_buffer_dmat,
  464                                    gdt->sc_gccbs[i].gc_dmamap);
  465         bus_dmamap_unload(gdt->sc_gcscratch_dmat, gdt->sc_gcscratch_dmamap);
  466         free(gdt->sc_gccbs, M_GDTBUF);
  467       case 4:
  468         bus_dmamem_free(gdt->sc_gcscratch_dmat, gdt->sc_gcscratch, gdt->sc_gcscratch_dmamap);
  469       case 3:
  470         bus_dma_tag_destroy(gdt->sc_gcscratch_dmat);
  471       case 2:
  472         bus_dma_tag_destroy(gdt->sc_buffer_dmat);
  473       case 1:
  474         bus_dma_tag_destroy(gdt->sc_parent_dmat);
  475       case 0:
  476         break;
  477     }
  478     TAILQ_REMOVE(&gdt_softcs, gdt, links);
  479 }
  480 
  481 void
  482 iir_attach(struct gdt_softc *gdt)
  483 {
  484     struct cam_devq *devq;
  485     int i;
  486 
  487     GDT_DPRINTF(GDT_D_INIT, ("iir_attach()\n"));
  488 
  489     /*
  490      * Create the device queue for our SIM.
  491      * XXX Throttle this down since the card has problems under load.
  492      */
  493     devq = cam_simq_alloc(32);
  494     if (devq == NULL)
  495         return;
  496 
  497     for (i = 0; i < gdt->sc_bus_cnt; i++) {
  498         /*
  499          * Construct our SIM entry
  500          */
  501         gdt->sims[i] = cam_sim_alloc(iir_action, iir_poll, "iir",
  502                                      gdt, gdt->sc_hanum, &Giant,
  503                                      /*untagged*/1,
  504                                      /*tagged*/GDT_MAXCMDS, devq);
  505         if (xpt_bus_register(gdt->sims[i], gdt->sc_devnode, i) != CAM_SUCCESS) {
  506             cam_sim_free(gdt->sims[i], /*free_devq*/i == 0);
  507             break;
  508         }
  509 
  510         if (xpt_create_path(&gdt->paths[i], /*periph*/NULL,
  511                             cam_sim_path(gdt->sims[i]),
  512                             CAM_TARGET_WILDCARD,
  513                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  514             xpt_bus_deregister(cam_sim_path(gdt->sims[i]));
  515             cam_sim_free(gdt->sims[i], /*free_devq*/i == 0);
  516             break;
  517         }
  518     }
  519     if (i > 0)
  520         EVENTHANDLER_REGISTER(shutdown_final, iir_shutdown,
  521                               gdt, SHUTDOWN_PRI_DEFAULT);
  522     /* iir_watchdog(gdt); */
  523     gdt->sc_state = GDT_NORMAL;
  524 }
  525 
  526 static void
  527 gdt_eval_mapping(u_int32_t size, int *cyls, int *heads, int *secs)
  528 {
  529     *cyls = size / GDT_HEADS / GDT_SECS;
  530     if (*cyls < GDT_MAXCYLS) {
  531         *heads = GDT_HEADS;
  532         *secs = GDT_SECS;
  533     } else {
  534         /* Too high for 64 * 32 */
  535         *cyls = size / GDT_MEDHEADS / GDT_MEDSECS;
  536         if (*cyls < GDT_MAXCYLS) {
  537             *heads = GDT_MEDHEADS;
  538             *secs = GDT_MEDSECS;
  539         } else {
  540             /* Too high for 127 * 63 */
  541             *cyls = size / GDT_BIGHEADS / GDT_BIGSECS;
  542             *heads = GDT_BIGHEADS;
  543             *secs = GDT_BIGSECS;
  544         }
  545     }
  546 }
  547 
  548 static int
  549 gdt_wait(struct gdt_softc *gdt, struct gdt_ccb *gccb, 
  550          int timeout)
  551 {
  552     int rv = 0;
  553 
  554     GDT_DPRINTF(GDT_D_INIT,
  555                 ("gdt_wait(%p, %p, %d)\n", gdt, gccb, timeout));
  556 
  557     gdt->sc_state |= GDT_POLL_WAIT;
  558     do {
  559         iir_intr(gdt);
  560         if (gdt == gdt_wait_gdt &&
  561             gccb->gc_cmd_index == gdt_wait_index) {
  562             rv = 1;
  563             break;
  564         }
  565         DELAY(1);
  566     } while (--timeout);
  567     gdt->sc_state &= ~GDT_POLL_WAIT;
  568     
  569     while (gdt->sc_test_busy(gdt))
  570         DELAY(1);               /* XXX correct? */
  571 
  572     return (rv);
  573 }
  574 
  575 static int
  576 gdt_internal_cmd(struct gdt_softc *gdt, struct gdt_ccb *gccb,
  577                  u_int8_t service, u_int16_t opcode, 
  578                  u_int32_t arg1, u_int32_t arg2, u_int32_t arg3)
  579 {
  580     int retries;
  581     
  582     GDT_DPRINTF(GDT_D_CMD, ("gdt_internal_cmd(%p, %d, %d, %d, %d, %d)\n",
  583                             gdt, service, opcode, arg1, arg2, arg3));
  584 
  585     bzero(gccb->gc_cmd, GDT_CMD_SZ);
  586 
  587     for (retries = GDT_RETRIES; ; ) {
  588         gccb->gc_service = service;
  589         gccb->gc_flags = GDT_GCF_INTERNAL;
  590         
  591         gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
  592                   gccb->gc_cmd_index);
  593         gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, opcode);
  594 
  595         switch (service) {
  596           case GDT_CACHESERVICE:
  597             if (opcode == GDT_IOCTL) {
  598                 gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION +
  599                           GDT_IOCTL_SUBFUNC, arg1);
  600                 gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION +
  601                           GDT_IOCTL_CHANNEL, arg2);
  602                 gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION +
  603                           GDT_IOCTL_PARAM_SIZE, (u_int16_t)arg3);
  604                 gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_P_PARAM,
  605                           gccb->gc_scratch_busbase);
  606             } else {
  607                 gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION +
  608                           GDT_CACHE_DEVICENO, (u_int16_t)arg1);
  609                 gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION +
  610                           GDT_CACHE_BLOCKNO, arg2);
  611             }
  612             break;
  613 
  614           case GDT_SCSIRAWSERVICE:
  615             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION +
  616                       GDT_RAW_DIRECTION, arg1);
  617             gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_BUS] =
  618                 (u_int8_t)arg2;
  619             gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_TARGET] =
  620                 (u_int8_t)arg3;
  621             gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_LUN] =
  622                 (u_int8_t)(arg3 >> 8);
  623         }
  624 
  625         gdt->sc_set_sema0(gdt);
  626         gccb->gc_cmd_len = GDT_CMD_SZ;
  627         gdt->sc_cmd_off = 0;
  628         gdt->sc_cmd_cnt = 0;
  629         gdt->sc_copy_cmd(gdt, gccb);
  630         gdt->sc_release_event(gdt);
  631         DELAY(20);
  632         if (!gdt_wait(gdt, gccb, GDT_POLL_TIMEOUT))
  633             return (0);
  634         if (gdt->sc_status != GDT_S_BSY || --retries == 0)
  635             break;
  636         DELAY(1);
  637     }
  638     return (gdt->sc_status == GDT_S_OK);
  639 }
  640 
  641 static struct gdt_ccb *
  642 gdt_get_ccb(struct gdt_softc *gdt)
  643 {
  644     struct gdt_ccb *gccb;
  645     int lock;
  646     
  647     GDT_DPRINTF(GDT_D_QUEUE, ("gdt_get_ccb(%p)\n", gdt));
  648 
  649     lock = splcam();
  650     gccb = SLIST_FIRST(&gdt->sc_free_gccb);
  651     if (gccb != NULL) {
  652         SLIST_REMOVE_HEAD(&gdt->sc_free_gccb, sle);
  653         SLIST_INSERT_HEAD(&gdt->sc_pending_gccb, gccb, sle);
  654         ++gdt_stat.cmd_index_act;
  655         if (gdt_stat.cmd_index_act > gdt_stat.cmd_index_max)
  656             gdt_stat.cmd_index_max = gdt_stat.cmd_index_act;
  657     }
  658     splx(lock);
  659     return (gccb);
  660 }
  661 
  662 void
  663 gdt_free_ccb(struct gdt_softc *gdt, struct gdt_ccb *gccb)
  664 {
  665     int lock;
  666 
  667     GDT_DPRINTF(GDT_D_QUEUE, ("gdt_free_ccb(%p, %p)\n", gdt, gccb));
  668     
  669     lock = splcam();
  670     gccb->gc_flags = GDT_GCF_UNUSED;
  671     SLIST_REMOVE(&gdt->sc_pending_gccb, gccb, gdt_ccb, sle);
  672     SLIST_INSERT_HEAD(&gdt->sc_free_gccb, gccb, sle);
  673     --gdt_stat.cmd_index_act;
  674     splx(lock);
  675     if (gdt->sc_state & GDT_SHUTDOWN)
  676         wakeup(gccb);
  677 }
  678 
  679 void    
  680 gdt_next(struct gdt_softc *gdt)
  681 {
  682     int lock;
  683     union ccb *ccb;
  684     gdt_ucmd_t *ucmd;
  685     struct cam_sim *sim;
  686     int bus, target, lun;
  687     int next_cmd;
  688 
  689     struct ccb_scsiio *csio;
  690     struct ccb_hdr *ccbh;
  691     struct gdt_ccb *gccb = NULL;
  692     u_int8_t cmd;
  693 
  694     GDT_DPRINTF(GDT_D_QUEUE, ("gdt_next(%p)\n", gdt));
  695 
  696     lock = splcam();
  697     if (gdt->sc_test_busy(gdt)) {
  698         if (!(gdt->sc_state & GDT_POLLING)) {
  699             splx(lock);
  700             return;
  701         }
  702         while (gdt->sc_test_busy(gdt))
  703             DELAY(1);
  704     }
  705 
  706     gdt->sc_cmd_cnt = gdt->sc_cmd_off = 0;
  707     next_cmd = TRUE;
  708     for (;;) {
  709         /* I/Os in queue? controller ready? */
  710         if (!TAILQ_FIRST(&gdt->sc_ucmd_queue) &&
  711             !TAILQ_FIRST(&gdt->sc_ccb_queue))
  712             break;
  713 
  714         /* 1.: I/Os without ccb (IOCTLs) */
  715         ucmd = TAILQ_FIRST(&gdt->sc_ucmd_queue);
  716         if (ucmd != NULL) {
  717             TAILQ_REMOVE(&gdt->sc_ucmd_queue, ucmd, links);
  718             if ((gccb = gdt_ioctl_cmd(gdt, ucmd, &lock)) == NULL) {
  719                 TAILQ_INSERT_HEAD(&gdt->sc_ucmd_queue, ucmd, links);
  720                 break;
  721             }
  722             break;      
  723             /* wenn mehrere Kdos. zulassen: if (!gdt_polling) continue; */
  724         }
  725 
  726         /* 2.: I/Os with ccb */
  727         ccb = (union ccb *)TAILQ_FIRST(&gdt->sc_ccb_queue); 
  728         /* ist dann immer != NULL, da oben getestet */
  729         sim = (struct cam_sim *)ccb->ccb_h.ccb_sim_ptr;
  730         bus = cam_sim_bus(sim);
  731         target = ccb->ccb_h.target_id;
  732         lun = ccb->ccb_h.target_lun;
  733     
  734         TAILQ_REMOVE(&gdt->sc_ccb_queue, &ccb->ccb_h, sim_links.tqe);
  735         --gdt_stat.req_queue_act;
  736         /* ccb->ccb_h.func_code is XPT_SCSI_IO */
  737         GDT_DPRINTF(GDT_D_QUEUE, ("XPT_SCSI_IO flags 0x%x)\n", 
  738                                   ccb->ccb_h.flags));
  739         csio = &ccb->csio;
  740         ccbh = &ccb->ccb_h;
  741         cmd  = csio->cdb_io.cdb_bytes[0];
  742         /* Max CDB length is 12 bytes */
  743         if (csio->cdb_len > 12) { 
  744             ccbh->status = CAM_REQ_INVALID;
  745             --gdt_stat.io_count_act;
  746             xpt_done(ccb);
  747         } else if (bus != gdt->sc_virt_bus) {
  748             /* raw service command */
  749             if ((gccb = gdt_raw_cmd(gdt, ccb, &lock)) == NULL) {
  750                 TAILQ_INSERT_HEAD(&gdt->sc_ccb_queue, &ccb->ccb_h, 
  751                                   sim_links.tqe);
  752                 ++gdt_stat.req_queue_act;
  753                 if (gdt_stat.req_queue_act > gdt_stat.req_queue_max)
  754                     gdt_stat.req_queue_max = gdt_stat.req_queue_act;
  755                 next_cmd = FALSE;
  756             }
  757         } else if (target >= GDT_MAX_HDRIVES || 
  758                    !gdt->sc_hdr[target].hd_present || lun != 0) {
  759             ccbh->status = CAM_DEV_NOT_THERE;
  760             --gdt_stat.io_count_act;
  761             xpt_done(ccb);
  762         } else {
  763             /* cache service command */
  764             if (cmd == READ_6  || cmd == WRITE_6 ||
  765                 cmd == READ_10 || cmd == WRITE_10) {
  766                 if ((gccb = gdt_cache_cmd(gdt, ccb, &lock)) == NULL) {
  767                     TAILQ_INSERT_HEAD(&gdt->sc_ccb_queue, &ccb->ccb_h, 
  768                                       sim_links.tqe);
  769                     ++gdt_stat.req_queue_act;
  770                     if (gdt_stat.req_queue_act > gdt_stat.req_queue_max)
  771                         gdt_stat.req_queue_max = gdt_stat.req_queue_act;
  772                     next_cmd = FALSE;
  773                 }
  774             } else {
  775                 splx(lock);
  776                 gdt_internal_cache_cmd(gdt, ccb);
  777                 lock = splcam();
  778             }
  779         }           
  780         if ((gdt->sc_state & GDT_POLLING) || !next_cmd)
  781             break;
  782     }
  783     if (gdt->sc_cmd_cnt > 0)
  784         gdt->sc_release_event(gdt);
  785 
  786     splx(lock);
  787 
  788     if ((gdt->sc_state & GDT_POLLING) && gdt->sc_cmd_cnt > 0) {
  789         gdt_wait(gdt, gccb, GDT_POLL_TIMEOUT);
  790     }
  791 }
  792 
  793 static struct gdt_ccb *
  794 gdt_raw_cmd(struct gdt_softc *gdt, union ccb *ccb, int *lock)
  795 {
  796     struct gdt_ccb *gccb;
  797     struct cam_sim *sim;
  798     int error;
  799 
  800     GDT_DPRINTF(GDT_D_CMD, ("gdt_raw_cmd(%p, %p)\n", gdt, ccb));
  801 
  802     if (roundup(GDT_CMD_UNION + GDT_RAW_SZ, sizeof(u_int32_t)) +
  803         gdt->sc_cmd_off + GDT_DPMEM_COMMAND_OFFSET >
  804         gdt->sc_ic_all_size) {
  805         GDT_DPRINTF(GDT_D_INVALID, ("iir%d: gdt_raw_cmd(): DPMEM overflow\n", 
  806                                     gdt->sc_hanum));
  807         return (NULL);
  808     }
  809 
  810     gccb = gdt_get_ccb(gdt);
  811     if (gccb == NULL) {
  812         GDT_DPRINTF(GDT_D_INVALID, ("iir%d: No free command index found\n",
  813                                     gdt->sc_hanum));
  814         return (gccb);
  815     }
  816     bzero(gccb->gc_cmd, GDT_CMD_SZ);
  817     sim = (struct cam_sim *)ccb->ccb_h.ccb_sim_ptr;
  818     gccb->gc_ccb = ccb;
  819     gccb->gc_service = GDT_SCSIRAWSERVICE;
  820     gccb->gc_flags = GDT_GCF_SCSI;
  821         
  822     if (gdt->sc_cmd_cnt == 0)
  823         gdt->sc_set_sema0(gdt);
  824     splx(*lock);
  825     gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
  826               gccb->gc_cmd_index);
  827     gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, GDT_WRITE);
  828 
  829     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_DIRECTION,
  830               (ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN ?
  831               GDT_DATA_IN : GDT_DATA_OUT);
  832     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SDLEN,
  833               ccb->csio.dxfer_len);
  834     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_CLEN,
  835               ccb->csio.cdb_len);
  836     bcopy(ccb->csio.cdb_io.cdb_bytes, gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_CMD,
  837           ccb->csio.cdb_len);
  838     gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_TARGET] = 
  839         ccb->ccb_h.target_id;
  840     gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_LUN] = 
  841         ccb->ccb_h.target_lun;
  842     gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_BUS] = 
  843         cam_sim_bus(sim);
  844     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SENSE_LEN,
  845               sizeof(struct scsi_sense_data));
  846     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SENSE_DATA,
  847               gccb->gc_scratch_busbase);
  848  
  849     error = bus_dmamap_load_ccb(gdt->sc_buffer_dmat,
  850                                 gccb->gc_dmamap,
  851                                 ccb,
  852                                 gdtexecuteccb,
  853                                 gccb, /*flags*/0);
  854     if (error == EINPROGRESS) {
  855         xpt_freeze_simq(sim, 1);
  856         gccb->gc_ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  857     }
  858 
  859     *lock = splcam();
  860     return (gccb);
  861 }
  862 
  863 static struct gdt_ccb *
  864 gdt_cache_cmd(struct gdt_softc *gdt, union ccb *ccb, int *lock)
  865 {
  866     struct gdt_ccb *gccb;
  867     struct cam_sim *sim;
  868     u_int8_t *cmdp;
  869     u_int16_t opcode;
  870     u_int32_t blockno, blockcnt;
  871     int error;
  872 
  873     GDT_DPRINTF(GDT_D_CMD, ("gdt_cache_cmd(%p, %p)\n", gdt, ccb));
  874 
  875     if (roundup(GDT_CMD_UNION + GDT_CACHE_SZ, sizeof(u_int32_t)) +
  876         gdt->sc_cmd_off + GDT_DPMEM_COMMAND_OFFSET >
  877         gdt->sc_ic_all_size) {
  878         GDT_DPRINTF(GDT_D_INVALID, ("iir%d: gdt_cache_cmd(): DPMEM overflow\n", 
  879                                     gdt->sc_hanum));
  880         return (NULL);
  881     }
  882 
  883     gccb = gdt_get_ccb(gdt);
  884     if (gccb == NULL) {
  885         GDT_DPRINTF(GDT_D_DEBUG, ("iir%d: No free command index found\n",
  886                                   gdt->sc_hanum));
  887         return (gccb);
  888     }
  889     bzero(gccb->gc_cmd, GDT_CMD_SZ);
  890     sim = (struct cam_sim *)ccb->ccb_h.ccb_sim_ptr;
  891     gccb->gc_ccb = ccb;
  892     gccb->gc_service = GDT_CACHESERVICE;
  893     gccb->gc_flags = GDT_GCF_SCSI;
  894         
  895     if (gdt->sc_cmd_cnt == 0)
  896         gdt->sc_set_sema0(gdt);
  897     splx(*lock);
  898     gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
  899               gccb->gc_cmd_index);
  900     cmdp = ccb->csio.cdb_io.cdb_bytes;
  901     opcode = (*cmdp == WRITE_6 || *cmdp == WRITE_10) ? GDT_WRITE : GDT_READ;
  902     if ((gdt->sc_state & GDT_SHUTDOWN) && opcode == GDT_WRITE)
  903         opcode = GDT_WRITE_THR;
  904     gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, opcode);
  905  
  906     gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_DEVICENO,
  907               ccb->ccb_h.target_id);
  908     if (ccb->csio.cdb_len == 6) {
  909         struct scsi_rw_6 *rw = (struct scsi_rw_6 *)cmdp;
  910         blockno = scsi_3btoul(rw->addr) & ((SRW_TOPADDR<<16) | 0xffff);
  911         blockcnt = rw->length ? rw->length : 0x100;
  912     } else {
  913         struct scsi_rw_10 *rw = (struct scsi_rw_10 *)cmdp;
  914         blockno = scsi_4btoul(rw->addr);
  915         blockcnt = scsi_2btoul(rw->length);
  916     }
  917     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_BLOCKNO,
  918               blockno);
  919     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_BLOCKCNT,
  920               blockcnt);
  921 
  922     error = bus_dmamap_load_ccb(gdt->sc_buffer_dmat,
  923                                 gccb->gc_dmamap,
  924                                 ccb,
  925                                 gdtexecuteccb,
  926                                 gccb, /*flags*/0);
  927     if (error == EINPROGRESS) {
  928         xpt_freeze_simq(sim, 1);
  929         gccb->gc_ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  930     }
  931     *lock = splcam();
  932     return (gccb);
  933 }
  934 
  935 static struct gdt_ccb *
  936 gdt_ioctl_cmd(struct gdt_softc *gdt, gdt_ucmd_t *ucmd, int *lock)
  937 {
  938     struct gdt_ccb *gccb;
  939     u_int32_t cnt;
  940 
  941     GDT_DPRINTF(GDT_D_DEBUG, ("gdt_ioctl_cmd(%p, %p)\n", gdt, ucmd));
  942 
  943     gccb = gdt_get_ccb(gdt);
  944     if (gccb == NULL) {
  945         GDT_DPRINTF(GDT_D_DEBUG, ("iir%d: No free command index found\n",
  946                                   gdt->sc_hanum));
  947         return (gccb);
  948     }
  949     bzero(gccb->gc_cmd, GDT_CMD_SZ);
  950     gccb->gc_ucmd = ucmd;
  951     gccb->gc_service = ucmd->service;
  952     gccb->gc_flags = GDT_GCF_IOCTL;
  953         
  954     /* check DPMEM space, copy data buffer from user space */
  955     if (ucmd->service == GDT_CACHESERVICE) {
  956         if (ucmd->OpCode == GDT_IOCTL) {
  957             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_IOCTL_SZ,
  958                                       sizeof(u_int32_t));
  959             cnt = ucmd->u.ioctl.param_size;
  960             if (cnt > GDT_SCRATCH_SZ) {
  961                 printf("iir%d: Scratch buffer too small (%d/%d)\n", 
  962                        gdt->sc_hanum, GDT_SCRATCH_SZ, cnt);
  963                 gdt_free_ccb(gdt, gccb);
  964                 return (NULL);
  965             }
  966         } else {
  967             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_CACHE_SG_LST +
  968                                       GDT_SG_SZ, sizeof(u_int32_t));
  969             cnt = ucmd->u.cache.BlockCnt * GDT_SECTOR_SIZE;
  970             if (cnt > GDT_SCRATCH_SZ) {
  971                 printf("iir%d: Scratch buffer too small (%d/%d)\n", 
  972                        gdt->sc_hanum, GDT_SCRATCH_SZ, cnt);
  973                 gdt_free_ccb(gdt, gccb);
  974                 return (NULL);
  975             }
  976         }
  977     } else {
  978         gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_RAW_SG_LST +
  979                                   GDT_SG_SZ, sizeof(u_int32_t));
  980         cnt = ucmd->u.raw.sdlen;
  981         if (cnt + ucmd->u.raw.sense_len > GDT_SCRATCH_SZ) {
  982             printf("iir%d: Scratch buffer too small (%d/%d)\n", 
  983                    gdt->sc_hanum, GDT_SCRATCH_SZ, cnt + ucmd->u.raw.sense_len);
  984             gdt_free_ccb(gdt, gccb);
  985             return (NULL);
  986         }
  987     }
  988     if (cnt != 0) 
  989         bcopy(ucmd->data, gccb->gc_scratch, cnt);
  990 
  991     if (gdt->sc_cmd_off + gccb->gc_cmd_len + GDT_DPMEM_COMMAND_OFFSET >
  992         gdt->sc_ic_all_size) {
  993         GDT_DPRINTF(GDT_D_INVALID, ("iir%d: gdt_ioctl_cmd(): DPMEM overflow\n", 
  994                                     gdt->sc_hanum));
  995         gdt_free_ccb(gdt, gccb);
  996         return (NULL);
  997     }
  998 
  999     if (gdt->sc_cmd_cnt == 0)
 1000         gdt->sc_set_sema0(gdt);
 1001     splx(*lock);
 1002 
 1003     /* fill cmd structure */
 1004     gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
 1005               gccb->gc_cmd_index);
 1006     gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, 
 1007               ucmd->OpCode);
 1008 
 1009     if (ucmd->service == GDT_CACHESERVICE) {
 1010         if (ucmd->OpCode == GDT_IOCTL) {
 1011             /* IOCTL */
 1012             gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_PARAM_SIZE,
 1013                       ucmd->u.ioctl.param_size);
 1014             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_SUBFUNC,
 1015                       ucmd->u.ioctl.subfunc);
 1016             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_CHANNEL,
 1017                       ucmd->u.ioctl.channel);
 1018             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_P_PARAM,
 1019                       gccb->gc_scratch_busbase);
 1020         } else {
 1021             /* cache service command */
 1022             gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_DEVICENO,
 1023                       ucmd->u.cache.DeviceNo);
 1024             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_BLOCKNO,
 1025                       ucmd->u.cache.BlockNo);
 1026             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_BLOCKCNT,
 1027                       ucmd->u.cache.BlockCnt);
 1028             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_DESTADDR,
 1029                       0xffffffffUL);
 1030             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_CANZ,
 1031                       1);
 1032             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_LST + 
 1033                       GDT_SG_PTR, gccb->gc_scratch_busbase);
 1034             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_LST +
 1035                       GDT_SG_LEN, ucmd->u.cache.BlockCnt * GDT_SECTOR_SIZE);
 1036         }
 1037     } else {
 1038         /* raw service command */
 1039         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_DIRECTION,
 1040                   ucmd->u.raw.direction);
 1041         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SDATA,
 1042                   0xffffffffUL);
 1043         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SDLEN,
 1044                   ucmd->u.raw.sdlen);
 1045         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_CLEN,
 1046                   ucmd->u.raw.clen);
 1047         bcopy(ucmd->u.raw.cmd, gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_CMD,
 1048               12);
 1049         gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_TARGET] = 
 1050             ucmd->u.raw.target;
 1051         gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_LUN] = 
 1052             ucmd->u.raw.lun;
 1053         gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_BUS] = 
 1054             ucmd->u.raw.bus;
 1055         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SENSE_LEN,
 1056                   ucmd->u.raw.sense_len);
 1057         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SENSE_DATA,
 1058                   gccb->gc_scratch_busbase + ucmd->u.raw.sdlen);
 1059         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_RANZ,
 1060                   1);
 1061         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_LST + 
 1062                   GDT_SG_PTR, gccb->gc_scratch_busbase);
 1063         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_LST +
 1064                   GDT_SG_LEN, ucmd->u.raw.sdlen);
 1065     }
 1066 
 1067     *lock = splcam();
 1068     gdt_stat.sg_count_act = 1;
 1069     gdt->sc_copy_cmd(gdt, gccb);
 1070     return (gccb);
 1071 }
 1072 
 1073 static void 
 1074 gdt_internal_cache_cmd(struct gdt_softc *gdt,union ccb *ccb)
 1075 {
 1076     int t;
 1077 
 1078     t = ccb->ccb_h.target_id;
 1079     GDT_DPRINTF(GDT_D_CMD, ("gdt_internal_cache_cmd(%p, %p, 0x%x, %d)\n", 
 1080         gdt, ccb, ccb->csio.cdb_io.cdb_bytes[0], t));
 1081 
 1082     switch (ccb->csio.cdb_io.cdb_bytes[0]) {
 1083       case TEST_UNIT_READY:
 1084       case START_STOP:
 1085         break;
 1086       case REQUEST_SENSE:
 1087         GDT_DPRINTF(GDT_D_MISC, ("REQUEST_SENSE\n"));
 1088         break;
 1089       case INQUIRY:
 1090         {
 1091             struct scsi_inquiry_data inq;
 1092             size_t copylen = MIN(sizeof(inq), ccb->csio.dxfer_len);
 1093 
 1094             bzero(&inq, sizeof(inq));
 1095             inq.device = (gdt->sc_hdr[t].hd_devtype & 4) ?
 1096                 T_CDROM : T_DIRECT;
 1097             inq.dev_qual2 = (gdt->sc_hdr[t].hd_devtype & 1) ? 0x80 : 0;
 1098             inq.version = SCSI_REV_2;
 1099             inq.response_format = 2; 
 1100             inq.additional_length = 32; 
 1101             inq.flags = SID_CmdQue | SID_Sync; 
 1102             strncpy(inq.vendor, gdt->oem_name, sizeof(inq.vendor));
 1103             snprintf(inq.product, sizeof(inq.product),
 1104                      "Host Drive   #%02d", t);
 1105             strncpy(inq.revision, "   ", sizeof(inq.revision));
 1106             bcopy(&inq, ccb->csio.data_ptr, copylen );
 1107             if( ccb->csio.dxfer_len > copylen )
 1108                 bzero( ccb->csio.data_ptr+copylen,
 1109                        ccb->csio.dxfer_len - copylen );
 1110             break;
 1111         }
 1112       case MODE_SENSE_6:
 1113         {
 1114             struct mpd_data {
 1115                 struct scsi_mode_hdr_6 hd;
 1116                 struct scsi_mode_block_descr bd;
 1117                 struct scsi_control_page cp;
 1118             } mpd;
 1119             size_t copylen = MIN(sizeof(mpd), ccb->csio.dxfer_len);
 1120             u_int8_t page;
 1121 
 1122             /*mpd = (struct mpd_data *)ccb->csio.data_ptr;*/
 1123             bzero(&mpd, sizeof(mpd));
 1124             mpd.hd.datalen = sizeof(struct scsi_mode_hdr_6) +
 1125                 sizeof(struct scsi_mode_block_descr);
 1126             mpd.hd.dev_specific = (gdt->sc_hdr[t].hd_devtype & 2) ? 0x80 : 0;
 1127             mpd.hd.block_descr_len = sizeof(struct scsi_mode_block_descr);
 1128             mpd.bd.block_len[0] = (GDT_SECTOR_SIZE & 0x00ff0000) >> 16;
 1129             mpd.bd.block_len[1] = (GDT_SECTOR_SIZE & 0x0000ff00) >> 8;
 1130             mpd.bd.block_len[2] = (GDT_SECTOR_SIZE & 0x000000ff);
 1131 
 1132             bcopy(&mpd, ccb->csio.data_ptr, copylen );
 1133             if( ccb->csio.dxfer_len > copylen )
 1134                 bzero( ccb->csio.data_ptr+copylen,
 1135                        ccb->csio.dxfer_len - copylen );
 1136             page=((struct scsi_mode_sense_6 *)ccb->csio.cdb_io.cdb_bytes)->page;
 1137             switch (page) {
 1138               default:
 1139                 GDT_DPRINTF(GDT_D_MISC, ("MODE_SENSE_6: page 0x%x\n", page));
 1140                 break;
 1141             }
 1142             break;
 1143         }
 1144       case READ_CAPACITY:
 1145         {
 1146             struct scsi_read_capacity_data rcd;
 1147             size_t copylen = MIN(sizeof(rcd), ccb->csio.dxfer_len);
 1148               
 1149             /*rcd = (struct scsi_read_capacity_data *)ccb->csio.data_ptr;*/
 1150             bzero(&rcd, sizeof(rcd));
 1151             scsi_ulto4b(gdt->sc_hdr[t].hd_size - 1, rcd.addr);
 1152             scsi_ulto4b(GDT_SECTOR_SIZE, rcd.length);
 1153             bcopy(&rcd, ccb->csio.data_ptr, copylen );
 1154             if( ccb->csio.dxfer_len > copylen )
 1155                 bzero( ccb->csio.data_ptr+copylen,
 1156                        ccb->csio.dxfer_len - copylen );
 1157             break;
 1158         }
 1159       default:
 1160         GDT_DPRINTF(GDT_D_MISC, ("gdt_internal_cache_cmd(%d) unknown\n", 
 1161                                     ccb->csio.cdb_io.cdb_bytes[0]));
 1162         break;
 1163     }
 1164     ccb->ccb_h.status |= CAM_REQ_CMP;
 1165     --gdt_stat.io_count_act;
 1166     xpt_done(ccb);
 1167 }
 1168 
 1169 static void     
 1170 gdtmapmem(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 1171 {
 1172     bus_addr_t *busaddrp;
 1173     
 1174     busaddrp = (bus_addr_t *)arg;
 1175     *busaddrp = dm_segs->ds_addr;
 1176 }
 1177 
 1178 static void     
 1179 gdtexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 1180 {
 1181     struct gdt_ccb *gccb;
 1182     union ccb *ccb;
 1183     struct gdt_softc *gdt;
 1184     int i, lock;
 1185 
 1186     lock = splcam();
 1187 
 1188     gccb = (struct gdt_ccb *)arg;
 1189     ccb = gccb->gc_ccb;
 1190     gdt = cam_sim_softc((struct cam_sim *)ccb->ccb_h.ccb_sim_ptr);
 1191 
 1192     GDT_DPRINTF(GDT_D_CMD, ("gdtexecuteccb(%p, %p, %p, %d, %d)\n", 
 1193                             gdt, gccb, dm_segs, nseg, error));
 1194     gdt_stat.sg_count_act = nseg;
 1195     if (nseg > gdt_stat.sg_count_max)
 1196         gdt_stat.sg_count_max = nseg;
 1197 
 1198     /* Copy the segments into our SG list */
 1199     if (gccb->gc_service == GDT_CACHESERVICE) {
 1200         for (i = 0; i < nseg; ++i) {
 1201             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_LST +
 1202                       i * GDT_SG_SZ + GDT_SG_PTR, dm_segs->ds_addr);
 1203             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_LST +
 1204                       i * GDT_SG_SZ + GDT_SG_LEN, dm_segs->ds_len);
 1205             dm_segs++;
 1206         }
 1207         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_CANZ,      
 1208                   nseg);
 1209         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_DESTADDR, 
 1210                   0xffffffffUL);
 1211 
 1212         gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_CACHE_SG_LST +
 1213                                   nseg * GDT_SG_SZ, sizeof(u_int32_t));
 1214     } else {
 1215         for (i = 0; i < nseg; ++i) {
 1216             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_LST +
 1217                       i * GDT_SG_SZ + GDT_SG_PTR, dm_segs->ds_addr);
 1218             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_LST +
 1219                       i * GDT_SG_SZ + GDT_SG_LEN, dm_segs->ds_len);
 1220             dm_segs++;
 1221         }
 1222         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_RANZ,        
 1223                   nseg);
 1224         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SDATA, 
 1225                   0xffffffffUL);
 1226 
 1227         gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_RAW_SG_LST +
 1228                                   nseg * GDT_SG_SZ, sizeof(u_int32_t));
 1229     }
 1230 
 1231     if (nseg != 0) {
 1232         bus_dmamap_sync(gdt->sc_buffer_dmat, gccb->gc_dmamap, 
 1233             (ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN ?
 1234             BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
 1235     }
 1236     
 1237     /* We must NOT abort the command here if CAM_REQ_INPROG is not set,
 1238      * because command semaphore is already set!
 1239      */
 1240     
 1241     ccb->ccb_h.status |= CAM_SIM_QUEUED;
 1242     /* timeout handling */
 1243     gccb->gc_timeout_ch =
 1244         timeout(iir_timeout, (caddr_t)gccb,
 1245                 (ccb->ccb_h.timeout * hz) / 1000);
 1246 
 1247     gdt->sc_copy_cmd(gdt, gccb);
 1248     splx(lock);
 1249 }
 1250 
 1251 
 1252 static void     
 1253 iir_action( struct cam_sim *sim, union ccb *ccb )
 1254 {
 1255     struct gdt_softc *gdt;
 1256     int lock, bus, target, lun;
 1257 
 1258     gdt = (struct gdt_softc *)cam_sim_softc( sim );
 1259     ccb->ccb_h.ccb_sim_ptr = sim;
 1260     bus = cam_sim_bus(sim);
 1261     target = ccb->ccb_h.target_id;
 1262     lun = ccb->ccb_h.target_lun;
 1263     GDT_DPRINTF(GDT_D_CMD, 
 1264                 ("iir_action(%p) func 0x%x cmd 0x%x bus %d target %d lun %d\n", 
 1265                  gdt, ccb->ccb_h.func_code, ccb->csio.cdb_io.cdb_bytes[0], 
 1266                  bus, target, lun)); 
 1267     ++gdt_stat.io_count_act;
 1268     if (gdt_stat.io_count_act > gdt_stat.io_count_max)
 1269         gdt_stat.io_count_max = gdt_stat.io_count_act;
 1270 
 1271     switch (ccb->ccb_h.func_code) {
 1272       case XPT_SCSI_IO:
 1273         lock = splcam();
 1274         TAILQ_INSERT_TAIL(&gdt->sc_ccb_queue, &ccb->ccb_h, sim_links.tqe);
 1275         ++gdt_stat.req_queue_act;
 1276         if (gdt_stat.req_queue_act > gdt_stat.req_queue_max)
 1277             gdt_stat.req_queue_max = gdt_stat.req_queue_act;
 1278         splx(lock);
 1279         gdt_next(gdt);
 1280         break;
 1281       case XPT_RESET_DEV:   /* Bus Device Reset the specified SCSI device */
 1282       case XPT_ABORT:                       /* Abort the specified CCB */
 1283         /* XXX Implement */
 1284         ccb->ccb_h.status = CAM_REQ_INVALID;
 1285         --gdt_stat.io_count_act;
 1286         xpt_done(ccb);
 1287         break;
 1288       case XPT_SET_TRAN_SETTINGS:
 1289         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 1290         --gdt_stat.io_count_act;
 1291         xpt_done(ccb);  
 1292         break;
 1293       case XPT_GET_TRAN_SETTINGS:
 1294         /* Get default/user set transfer settings for the target */
 1295           {
 1296               struct        ccb_trans_settings *cts = &ccb->cts;
 1297               struct ccb_trans_settings_scsi *scsi = &cts->proto_specific.scsi;
 1298               struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
 1299 
 1300               cts->protocol = PROTO_SCSI;
 1301               cts->protocol_version = SCSI_REV_2;
 1302               cts->transport = XPORT_SPI;
 1303               cts->transport_version = 2;
 1304 
 1305               if (cts->type == CTS_TYPE_USER_SETTINGS) {
 1306                   spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 1307                   scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 1308                   spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 1309                   spi->sync_period = 25; /* 10MHz */
 1310                   if (spi->sync_period != 0)
 1311                       spi->sync_offset = 15;
 1312                   
 1313                   spi->valid = CTS_SPI_VALID_SYNC_RATE
 1314                       | CTS_SPI_VALID_SYNC_OFFSET
 1315                       | CTS_SPI_VALID_BUS_WIDTH
 1316                       | CTS_SPI_VALID_DISC;
 1317                   scsi->valid = CTS_SCSI_VALID_TQ;
 1318                   ccb->ccb_h.status = CAM_REQ_CMP;
 1319               } else {
 1320                   ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 1321               }
 1322               --gdt_stat.io_count_act;
 1323               xpt_done(ccb);
 1324               break;
 1325           }
 1326       case XPT_CALC_GEOMETRY:
 1327           {
 1328               struct ccb_calc_geometry *ccg;
 1329               u_int32_t secs_per_cylinder;
 1330 
 1331               ccg = &ccb->ccg;
 1332               ccg->heads = gdt->sc_hdr[target].hd_heads;
 1333               ccg->secs_per_track = gdt->sc_hdr[target].hd_secs;
 1334               secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 1335               ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 1336               ccb->ccb_h.status = CAM_REQ_CMP;
 1337               --gdt_stat.io_count_act;
 1338               xpt_done(ccb);
 1339               break;
 1340           }
 1341       case XPT_RESET_BUS:           /* Reset the specified SCSI bus */
 1342           {
 1343               /* XXX Implement */
 1344               ccb->ccb_h.status = CAM_REQ_CMP;
 1345               --gdt_stat.io_count_act;
 1346               xpt_done(ccb);
 1347               break;
 1348           }
 1349       case XPT_TERM_IO:             /* Terminate the I/O process */
 1350         /* XXX Implement */
 1351         ccb->ccb_h.status = CAM_REQ_INVALID;
 1352         --gdt_stat.io_count_act;
 1353         xpt_done(ccb);
 1354         break;
 1355       case XPT_PATH_INQ:            /* Path routing inquiry */
 1356           {
 1357               struct ccb_pathinq *cpi = &ccb->cpi;
 1358               
 1359               cpi->version_num = 1;
 1360               cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
 1361               cpi->hba_inquiry |= PI_WIDE_16;
 1362               cpi->target_sprt = 1;
 1363               cpi->hba_misc = 0;
 1364               cpi->hba_eng_cnt = 0;
 1365               if (bus == gdt->sc_virt_bus)
 1366                   cpi->max_target = GDT_MAX_HDRIVES - 1;
 1367               else if (gdt->sc_class & GDT_FC)
 1368                   cpi->max_target = GDT_MAXID_FC - 1;
 1369               else
 1370                   cpi->max_target = GDT_MAXID - 1;
 1371               cpi->max_lun = 7;
 1372               cpi->unit_number = cam_sim_unit(sim);
 1373               cpi->bus_id = bus;
 1374               cpi->initiator_id = 
 1375                   (bus == gdt->sc_virt_bus ? 127 : gdt->sc_bus_id[bus]);
 1376               cpi->base_transfer_speed = 3300;
 1377               strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 1378               if (gdt->sc_vendor == INTEL_VENDOR_ID_IIR)
 1379                   strncpy(cpi->hba_vid, "Intel Corp.", HBA_IDLEN);
 1380               else
 1381                   strncpy(cpi->hba_vid, "ICP vortex ", HBA_IDLEN);
 1382               strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 1383               cpi->transport = XPORT_SPI;
 1384               cpi->transport_version = 2;
 1385               cpi->protocol = PROTO_SCSI;
 1386               cpi->protocol_version = SCSI_REV_2;
 1387               cpi->ccb_h.status = CAM_REQ_CMP;
 1388               --gdt_stat.io_count_act;
 1389               xpt_done(ccb);
 1390               break;
 1391           }
 1392       default:
 1393         GDT_DPRINTF(GDT_D_INVALID, ("gdt_next(%p) cmd 0x%x invalid\n", 
 1394                                     gdt, ccb->ccb_h.func_code));
 1395         ccb->ccb_h.status = CAM_REQ_INVALID;
 1396         --gdt_stat.io_count_act;
 1397         xpt_done(ccb);
 1398         break;
 1399     }
 1400 }
 1401 
 1402 static void     
 1403 iir_poll( struct cam_sim *sim )
 1404 {
 1405     struct gdt_softc *gdt;
 1406 
 1407     gdt = (struct gdt_softc *)cam_sim_softc( sim );
 1408     GDT_DPRINTF(GDT_D_CMD, ("iir_poll sim %p gdt %p\n", sim, gdt));
 1409     iir_intr(gdt);
 1410 }
 1411 
 1412 static void     
 1413 iir_timeout(void *arg)
 1414 {
 1415     GDT_DPRINTF(GDT_D_TIMEOUT, ("iir_timeout(%p)\n", gccb));
 1416 }
 1417 
 1418 static void     
 1419 iir_shutdown( void *arg, int howto )
 1420 {
 1421     struct gdt_softc *gdt;
 1422     struct gdt_ccb *gccb;
 1423     gdt_ucmd_t *ucmd;
 1424     int lock, i;
 1425 
 1426     gdt = (struct gdt_softc *)arg;
 1427     GDT_DPRINTF(GDT_D_CMD, ("iir_shutdown(%p, %d)\n", gdt, howto));
 1428 
 1429     printf("iir%d: Flushing all Host Drives. Please wait ...  ",
 1430            gdt->sc_hanum);
 1431 
 1432     /* allocate ucmd buffer */
 1433     ucmd = malloc(sizeof(gdt_ucmd_t), M_GDTBUF, M_NOWAIT);
 1434     if (ucmd == NULL) {
 1435         printf("iir%d: iir_shutdown(): Cannot allocate resource\n",
 1436                gdt->sc_hanum);
 1437         return;
 1438     }
 1439     bzero(ucmd, sizeof(gdt_ucmd_t));
 1440 
 1441     /* wait for pending IOs */
 1442     lock = splcam();
 1443     gdt->sc_state = GDT_SHUTDOWN;
 1444     splx(lock);
 1445     if ((gccb = SLIST_FIRST(&gdt->sc_pending_gccb)) != NULL)
 1446         (void) tsleep((void *)gccb, PCATCH | PRIBIO, "iirshw", 100 * hz);
 1447 
 1448     /* flush */
 1449     for (i = 0; i < GDT_MAX_HDRIVES; ++i) {
 1450         if (gdt->sc_hdr[i].hd_present) {
 1451             ucmd->service = GDT_CACHESERVICE;
 1452             ucmd->OpCode = GDT_FLUSH;
 1453             ucmd->u.cache.DeviceNo = i;
 1454             lock = splcam();
 1455             TAILQ_INSERT_TAIL(&gdt->sc_ucmd_queue, ucmd, links);
 1456             ucmd->complete_flag = FALSE;
 1457             splx(lock);
 1458             gdt_next(gdt);
 1459             if (!ucmd->complete_flag)
 1460                 (void) tsleep((void *)ucmd, PCATCH|PRIBIO, "iirshw", 10*hz);
 1461         }
 1462     }
 1463 
 1464     free(ucmd, M_DEVBUF);
 1465     printf("Done.\n");
 1466 }
 1467 
 1468 void
 1469 iir_intr(void *arg)
 1470 {
 1471     struct gdt_softc *gdt = arg;
 1472     struct gdt_intr_ctx ctx;
 1473     int lock = 0;
 1474     struct gdt_ccb *gccb;
 1475     gdt_ucmd_t *ucmd;
 1476     u_int32_t cnt;
 1477 
 1478     GDT_DPRINTF(GDT_D_INTR, ("gdt_intr(%p)\n", gdt));
 1479 
 1480     /* If polling and we were not called from gdt_wait, just return */
 1481     if ((gdt->sc_state & GDT_POLLING) &&
 1482         !(gdt->sc_state & GDT_POLL_WAIT))
 1483         return;
 1484 
 1485     if (!(gdt->sc_state & GDT_POLLING)) 
 1486         lock = splcam();
 1487     gdt_wait_index = 0;
 1488 
 1489     ctx.istatus = gdt->sc_get_status(gdt);
 1490     if (ctx.istatus == 0x00) {
 1491         if (!(gdt->sc_state & GDT_POLLING)) 
 1492             splx(lock);
 1493         gdt->sc_status = GDT_S_NO_STATUS;
 1494         return;
 1495     }
 1496 
 1497     gdt->sc_intr(gdt, &ctx);
 1498 
 1499     gdt->sc_status = ctx.cmd_status;
 1500     gdt->sc_service = ctx.service;
 1501     gdt->sc_info = ctx.info;
 1502     gdt->sc_info2 = ctx.info2;
 1503 
 1504     if (gdt->sc_state & GDT_POLL_WAIT) { 
 1505         gdt_wait_gdt = gdt;
 1506         gdt_wait_index = ctx.istatus;
 1507     }
 1508 
 1509     if (ctx.istatus == GDT_ASYNCINDEX) {
 1510         gdt_async_event(gdt, ctx.service);
 1511         if (!(gdt->sc_state & GDT_POLLING)) 
 1512             splx(lock);
 1513         return;
 1514     }
 1515     if (ctx.istatus == GDT_SPEZINDEX) {
 1516         GDT_DPRINTF(GDT_D_INVALID, 
 1517                     ("iir%d: Service unknown or not initialized!\n", 
 1518                      gdt->sc_hanum));   
 1519         gdt->sc_dvr.size = sizeof(gdt->sc_dvr.eu.driver);
 1520         gdt->sc_dvr.eu.driver.ionode = gdt->sc_hanum;
 1521         gdt_store_event(GDT_ES_DRIVER, 4, &gdt->sc_dvr);
 1522         if (!(gdt->sc_state & GDT_POLLING)) 
 1523             splx(lock);
 1524         return;
 1525     }
 1526 
 1527     gccb = &gdt->sc_gccbs[ctx.istatus - 2];
 1528     ctx.service = gccb->gc_service;
 1529 
 1530     switch (gccb->gc_flags) {
 1531       case GDT_GCF_UNUSED:
 1532         GDT_DPRINTF(GDT_D_INVALID, ("iir%d: Index (%d) to unused command!\n",
 1533                     gdt->sc_hanum, ctx.istatus));
 1534         gdt->sc_dvr.size = sizeof(gdt->sc_dvr.eu.driver);
 1535         gdt->sc_dvr.eu.driver.ionode = gdt->sc_hanum;
 1536         gdt->sc_dvr.eu.driver.index = ctx.istatus;
 1537         gdt_store_event(GDT_ES_DRIVER, 1, &gdt->sc_dvr);
 1538         gdt_free_ccb(gdt, gccb);
 1539         /* fallthrough */
 1540 
 1541       case GDT_GCF_INTERNAL:
 1542         if (!(gdt->sc_state & GDT_POLLING)) 
 1543             splx(lock);
 1544         break;
 1545 
 1546       case GDT_GCF_IOCTL:
 1547         ucmd = gccb->gc_ucmd; 
 1548         if (gdt->sc_status == GDT_S_BSY) {
 1549             GDT_DPRINTF(GDT_D_DEBUG, ("iir_intr(%p) ioctl: gccb %p busy\n", 
 1550                                       gdt, gccb));
 1551             TAILQ_INSERT_HEAD(&gdt->sc_ucmd_queue, ucmd, links);
 1552             if (!(gdt->sc_state & GDT_POLLING)) 
 1553                 splx(lock);
 1554         } else {
 1555             ucmd->status = gdt->sc_status;
 1556             ucmd->info = gdt->sc_info;
 1557             ucmd->complete_flag = TRUE;
 1558             if (ucmd->service == GDT_CACHESERVICE) {
 1559                 if (ucmd->OpCode == GDT_IOCTL) {
 1560                     cnt = ucmd->u.ioctl.param_size;
 1561                     if (cnt != 0)
 1562                         bcopy(gccb->gc_scratch, ucmd->data, cnt);
 1563                 } else {
 1564                     cnt = ucmd->u.cache.BlockCnt * GDT_SECTOR_SIZE;
 1565                     if (cnt != 0)
 1566                         bcopy(gccb->gc_scratch, ucmd->data, cnt);
 1567                 }
 1568             } else {
 1569                 cnt = ucmd->u.raw.sdlen;
 1570                 if (cnt != 0)
 1571                     bcopy(gccb->gc_scratch, ucmd->data, cnt);
 1572                 if (ucmd->u.raw.sense_len != 0) 
 1573                     bcopy(gccb->gc_scratch, ucmd->data, cnt);
 1574             }
 1575             gdt_free_ccb(gdt, gccb);
 1576             if (!(gdt->sc_state & GDT_POLLING)) 
 1577                 splx(lock);
 1578             /* wakeup */
 1579             wakeup(ucmd);
 1580         }
 1581         gdt_next(gdt); 
 1582         break;
 1583 
 1584       default:
 1585         gdt_free_ccb(gdt, gccb);
 1586         gdt_sync_event(gdt, ctx.service, ctx.istatus, gccb);
 1587         if (!(gdt->sc_state & GDT_POLLING)) 
 1588             splx(lock);
 1589         gdt_next(gdt); 
 1590         break;
 1591     }
 1592 }
 1593 
 1594 int
 1595 gdt_async_event(struct gdt_softc *gdt, int service)
 1596 {
 1597     struct gdt_ccb *gccb;
 1598 
 1599     GDT_DPRINTF(GDT_D_INTR, ("gdt_async_event(%p, %d)\n", gdt, service));
 1600 
 1601     if (service == GDT_SCREENSERVICE) {
 1602         if (gdt->sc_status == GDT_MSG_REQUEST) {
 1603             while (gdt->sc_test_busy(gdt))
 1604                 DELAY(1);
 1605             gccb = gdt_get_ccb(gdt);
 1606             if (gccb == NULL) {
 1607                 printf("iir%d: No free command index found\n",
 1608                        gdt->sc_hanum);
 1609                 return (1);
 1610             }
 1611             bzero(gccb->gc_cmd, GDT_CMD_SZ);
 1612             gccb->gc_service = service;
 1613             gccb->gc_flags = GDT_GCF_SCREEN;
 1614             gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
 1615                       gccb->gc_cmd_index);
 1616             gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, GDT_READ);
 1617             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_HANDLE,
 1618                       GDT_MSG_INV_HANDLE);
 1619             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_ADDR,
 1620                       gccb->gc_scratch_busbase);
 1621             gdt->sc_set_sema0(gdt);
 1622             gdt->sc_cmd_off = 0;
 1623             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_SCREEN_SZ, 
 1624                                       sizeof(u_int32_t));
 1625             gdt->sc_cmd_cnt = 0;
 1626             gdt->sc_copy_cmd(gdt, gccb);
 1627             printf("iir%d: [PCI %d/%d] ",
 1628                 gdt->sc_hanum,gdt->sc_bus,gdt->sc_slot);
 1629             gdt->sc_release_event(gdt);
 1630         }
 1631 
 1632     } else {
 1633         if ((gdt->sc_fw_vers & 0xff) >= 0x1a) {
 1634             gdt->sc_dvr.size = 0;
 1635             gdt->sc_dvr.eu.async.ionode = gdt->sc_hanum;
 1636             gdt->sc_dvr.eu.async.status  = gdt->sc_status;
 1637             /* severity and event_string already set! */
 1638         } else {        
 1639             gdt->sc_dvr.size = sizeof(gdt->sc_dvr.eu.async);
 1640             gdt->sc_dvr.eu.async.ionode   = gdt->sc_hanum;
 1641             gdt->sc_dvr.eu.async.service = service;
 1642             gdt->sc_dvr.eu.async.status  = gdt->sc_status;
 1643             gdt->sc_dvr.eu.async.info    = gdt->sc_info;
 1644             *(u_int32_t *)gdt->sc_dvr.eu.async.scsi_coord  = gdt->sc_info2;
 1645         }
 1646         gdt_store_event(GDT_ES_ASYNC, service, &gdt->sc_dvr);
 1647         printf("iir%d: %s\n", gdt->sc_hanum, gdt->sc_dvr.event_string);
 1648     }
 1649     
 1650     return (0);
 1651 }
 1652 
 1653 int
 1654 gdt_sync_event(struct gdt_softc *gdt, int service, 
 1655                u_int8_t index, struct gdt_ccb *gccb)
 1656 {
 1657     union ccb *ccb;
 1658 
 1659     GDT_DPRINTF(GDT_D_INTR,
 1660                 ("gdt_sync_event(%p, %d, %d, %p)\n", gdt,service,index,gccb));
 1661 
 1662     ccb = gccb->gc_ccb;
 1663 
 1664     if (service == GDT_SCREENSERVICE) {
 1665         u_int32_t msg_len;
 1666 
 1667         msg_len = gdt_dec32(gccb->gc_scratch + GDT_SCR_MSG_LEN);
 1668         if (msg_len)
 1669             if (!(gccb->gc_scratch[GDT_SCR_MSG_ANSWER] && 
 1670                   gccb->gc_scratch[GDT_SCR_MSG_EXT])) {
 1671                 gccb->gc_scratch[GDT_SCR_MSG_TEXT + msg_len] = '\0';
 1672                 printf("%s",&gccb->gc_scratch[GDT_SCR_MSG_TEXT]);
 1673             }
 1674 
 1675         if (gccb->gc_scratch[GDT_SCR_MSG_EXT] && 
 1676             !gccb->gc_scratch[GDT_SCR_MSG_ANSWER]) {
 1677             while (gdt->sc_test_busy(gdt))
 1678                 DELAY(1);
 1679             bzero(gccb->gc_cmd, GDT_CMD_SZ);
 1680             gccb = gdt_get_ccb(gdt);
 1681             if (gccb == NULL) {
 1682                 printf("iir%d: No free command index found\n",
 1683                        gdt->sc_hanum);
 1684                 return (1);
 1685             }
 1686             gccb->gc_service = service;
 1687             gccb->gc_flags = GDT_GCF_SCREEN;
 1688             gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
 1689                       gccb->gc_cmd_index);
 1690             gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, GDT_READ);
 1691             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_HANDLE,
 1692                       gccb->gc_scratch[GDT_SCR_MSG_HANDLE]);
 1693             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_ADDR,
 1694                       gccb->gc_scratch_busbase);
 1695             gdt->sc_set_sema0(gdt);
 1696             gdt->sc_cmd_off = 0;
 1697             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_SCREEN_SZ, 
 1698                                       sizeof(u_int32_t));
 1699             gdt->sc_cmd_cnt = 0;
 1700             gdt->sc_copy_cmd(gdt, gccb);
 1701             gdt->sc_release_event(gdt);
 1702             return (0);
 1703         }
 1704 
 1705         if (gccb->gc_scratch[GDT_SCR_MSG_ANSWER] && 
 1706             gdt_dec32(gccb->gc_scratch + GDT_SCR_MSG_ALEN)) {
 1707             /* default answers (getchar() not possible) */
 1708             if (gdt_dec32(gccb->gc_scratch + GDT_SCR_MSG_ALEN) == 1) {
 1709                 gdt_enc32(gccb->gc_scratch + GDT_SCR_MSG_ALEN, 0);
 1710                 gdt_enc32(gccb->gc_scratch + GDT_SCR_MSG_LEN, 1);
 1711                 gccb->gc_scratch[GDT_SCR_MSG_TEXT] = 0;
 1712             } else {
 1713                 gdt_enc32(gccb->gc_scratch + GDT_SCR_MSG_ALEN, 
 1714                           gdt_dec32(gccb->gc_scratch + GDT_SCR_MSG_ALEN) - 2);
 1715                 gdt_enc32(gccb->gc_scratch + GDT_SCR_MSG_LEN, 2);
 1716                 gccb->gc_scratch[GDT_SCR_MSG_TEXT] = 1;
 1717                 gccb->gc_scratch[GDT_SCR_MSG_TEXT + 1] = 0;
 1718             }
 1719             gccb->gc_scratch[GDT_SCR_MSG_EXT] = 0;
 1720             gccb->gc_scratch[GDT_SCR_MSG_ANSWER] = 0;
 1721             while (gdt->sc_test_busy(gdt))
 1722                 DELAY(1);
 1723             bzero(gccb->gc_cmd, GDT_CMD_SZ);
 1724             gccb = gdt_get_ccb(gdt);
 1725             if (gccb == NULL) {
 1726                 printf("iir%d: No free command index found\n",
 1727                        gdt->sc_hanum);
 1728                 return (1);
 1729             }
 1730             gccb->gc_service = service;
 1731             gccb->gc_flags = GDT_GCF_SCREEN;
 1732             gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
 1733                       gccb->gc_cmd_index);
 1734             gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, GDT_WRITE);
 1735             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_HANDLE,
 1736                       gccb->gc_scratch[GDT_SCR_MSG_HANDLE]);
 1737             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_ADDR,
 1738                       gccb->gc_scratch_busbase);
 1739             gdt->sc_set_sema0(gdt);
 1740             gdt->sc_cmd_off = 0;
 1741             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_SCREEN_SZ, 
 1742                                       sizeof(u_int32_t));
 1743             gdt->sc_cmd_cnt = 0;
 1744             gdt->sc_copy_cmd(gdt, gccb);
 1745             gdt->sc_release_event(gdt);
 1746             return (0);
 1747         }
 1748         printf("\n");
 1749         return (0);
 1750     } else {
 1751         untimeout(iir_timeout, gccb, gccb->gc_timeout_ch);
 1752         if (gdt->sc_status == GDT_S_BSY) {
 1753             GDT_DPRINTF(GDT_D_DEBUG, ("gdt_sync_event(%p) gccb %p busy\n", 
 1754                                       gdt, gccb));
 1755             TAILQ_INSERT_HEAD(&gdt->sc_ccb_queue, &ccb->ccb_h, sim_links.tqe);
 1756             ++gdt_stat.req_queue_act;
 1757             if (gdt_stat.req_queue_act > gdt_stat.req_queue_max)
 1758                 gdt_stat.req_queue_max = gdt_stat.req_queue_act;
 1759             return (2);
 1760         }
 1761 
 1762         bus_dmamap_sync(gdt->sc_buffer_dmat, gccb->gc_dmamap, 
 1763             (ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN ?
 1764             BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
 1765         bus_dmamap_unload(gdt->sc_buffer_dmat, gccb->gc_dmamap);
 1766 
 1767         ccb->csio.resid = 0;
 1768         if (gdt->sc_status == GDT_S_OK) {
 1769             ccb->ccb_h.status |= CAM_REQ_CMP;
 1770             ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 1771         } else {
 1772             /* error */
 1773             if (gccb->gc_service == GDT_CACHESERVICE) {
 1774                 struct scsi_sense_data *sense;
 1775 
 1776                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
 1777                 ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 1778                 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
 1779                 bzero(&ccb->csio.sense_data, ccb->csio.sense_len);
 1780                 sense = &ccb->csio.sense_data;
 1781                 scsi_set_sense_data(sense,
 1782                                     /*sense_format*/ SSD_TYPE_NONE,
 1783                                     /*current_error*/ 1,
 1784                                     /*sense_key*/ SSD_KEY_NOT_READY,
 1785                                     /*asc*/ 0x4,
 1786                                     /*ascq*/ 0x01,
 1787                                     SSD_ELEM_NONE);
 1788 
 1789                 gdt->sc_dvr.size = sizeof(gdt->sc_dvr.eu.sync);
 1790                 gdt->sc_dvr.eu.sync.ionode  = gdt->sc_hanum;
 1791                 gdt->sc_dvr.eu.sync.service = service;
 1792                 gdt->sc_dvr.eu.sync.status  = gdt->sc_status;
 1793                 gdt->sc_dvr.eu.sync.info    = gdt->sc_info;
 1794                 gdt->sc_dvr.eu.sync.hostdrive = ccb->ccb_h.target_id;
 1795                 if (gdt->sc_status >= 0x8000)
 1796                     gdt_store_event(GDT_ES_SYNC, 0, &gdt->sc_dvr);
 1797                 else
 1798                     gdt_store_event(GDT_ES_SYNC, service, &gdt->sc_dvr);
 1799             } else {
 1800                 /* raw service */
 1801                 if (gdt->sc_status != GDT_S_RAW_SCSI || gdt->sc_info >= 0x100) {
 1802                     ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 1803                 } else {
 1804                     ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR|CAM_AUTOSNS_VALID;
 1805                     ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 1806                     ccb->csio.scsi_status = gdt->sc_info;
 1807                     bcopy(gccb->gc_scratch, &ccb->csio.sense_data,
 1808                           ccb->csio.sense_len);
 1809                 }
 1810             }
 1811         }
 1812         --gdt_stat.io_count_act;
 1813         xpt_done(ccb);
 1814     }
 1815     return (0);
 1816 }
 1817 
 1818 /* Controller event handling functions */
 1819 gdt_evt_str *gdt_store_event(u_int16_t source, u_int16_t idx,
 1820                              gdt_evt_data *evt)
 1821 {
 1822     gdt_evt_str *e;
 1823     struct timeval tv;
 1824 
 1825     GDT_DPRINTF(GDT_D_MISC, ("gdt_store_event(%d, %d)\n", source, idx));
 1826     if (source == 0)                        /* no source -> no event */
 1827         return 0;
 1828 
 1829     if (ebuffer[elastidx].event_source == source &&
 1830         ebuffer[elastidx].event_idx == idx &&
 1831         ((evt->size != 0 && ebuffer[elastidx].event_data.size != 0 &&
 1832           !memcmp((char *)&ebuffer[elastidx].event_data.eu,
 1833                   (char *)&evt->eu, evt->size)) ||
 1834          (evt->size == 0 && ebuffer[elastidx].event_data.size == 0 &&
 1835           !strcmp((char *)&ebuffer[elastidx].event_data.event_string,
 1836                   (char *)&evt->event_string)))) { 
 1837         e = &ebuffer[elastidx];
 1838         getmicrotime(&tv);
 1839         e->last_stamp = tv.tv_sec;
 1840         ++e->same_count;
 1841     } else {
 1842         if (ebuffer[elastidx].event_source != 0) {  /* entry not free ? */
 1843             ++elastidx;
 1844             if (elastidx == GDT_MAX_EVENTS)
 1845                 elastidx = 0;
 1846             if (elastidx == eoldidx) {              /* reached mark ? */
 1847                 ++eoldidx;
 1848                 if (eoldidx == GDT_MAX_EVENTS)
 1849                     eoldidx = 0;
 1850             }
 1851         }
 1852         e = &ebuffer[elastidx];
 1853         e->event_source = source;
 1854         e->event_idx = idx;
 1855         getmicrotime(&tv);
 1856         e->first_stamp = e->last_stamp = tv.tv_sec;
 1857         e->same_count = 1;
 1858         e->event_data = *evt;
 1859         e->application = 0;
 1860     }
 1861     return e;
 1862 }
 1863 
 1864 int gdt_read_event(int handle, gdt_evt_str *estr)
 1865 {
 1866     gdt_evt_str *e;
 1867     int eindex, lock;
 1868     
 1869     GDT_DPRINTF(GDT_D_MISC, ("gdt_read_event(%d)\n", handle));
 1870     lock = splcam();
 1871     if (handle == -1)
 1872         eindex = eoldidx;
 1873     else
 1874         eindex = handle;
 1875     estr->event_source = 0;
 1876 
 1877     if (eindex >= GDT_MAX_EVENTS) {
 1878         splx(lock);
 1879         return eindex;
 1880     }
 1881     e = &ebuffer[eindex];
 1882     if (e->event_source != 0) {
 1883         if (eindex != elastidx) {
 1884             if (++eindex == GDT_MAX_EVENTS)
 1885                 eindex = 0;
 1886         } else {
 1887             eindex = -1;
 1888         }
 1889         memcpy(estr, e, sizeof(gdt_evt_str));
 1890     }
 1891     splx(lock);
 1892     return eindex;
 1893 }
 1894 
 1895 void gdt_readapp_event(u_int8_t application, gdt_evt_str *estr)
 1896 {
 1897     gdt_evt_str *e;
 1898     int found = FALSE;
 1899     int eindex, lock;
 1900     
 1901     GDT_DPRINTF(GDT_D_MISC, ("gdt_readapp_event(%d)\n", application));
 1902     lock = splcam();
 1903     eindex = eoldidx;
 1904     for (;;) {
 1905         e = &ebuffer[eindex];
 1906         if (e->event_source == 0)
 1907             break;
 1908         if ((e->application & application) == 0) {
 1909             e->application |= application;
 1910             found = TRUE;
 1911             break;
 1912         }
 1913         if (eindex == elastidx)
 1914             break;
 1915         if (++eindex == GDT_MAX_EVENTS)
 1916             eindex = 0;
 1917     }
 1918     if (found)
 1919         memcpy(estr, e, sizeof(gdt_evt_str));
 1920     else
 1921         estr->event_source = 0;
 1922     splx(lock);
 1923 }
 1924 
 1925 void gdt_clear_events()
 1926 {
 1927     GDT_DPRINTF(GDT_D_MISC, ("gdt_clear_events\n"));
 1928 
 1929     eoldidx = elastidx = 0;
 1930     ebuffer[0].event_source = 0;
 1931 }

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