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/10.3/sys/dev/iir/iir.c 281826 2015-04-21 11:27:50Z mav $");
   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 #ifdef GDT_DEBUG
   75 int     gdt_debug = GDT_DEBUG;
   76 #ifdef __SERIAL__
   77 #define MAX_SERBUF 160
   78 static void ser_init(void);
   79 static void ser_puts(char *str);
   80 static void ser_putc(int c);
   81 static char strbuf[MAX_SERBUF+1];
   82 #ifdef __COM2__
   83 #define COM_BASE 0x2f8
   84 #else
   85 #define COM_BASE 0x3f8
   86 #endif
   87 static void ser_init()
   88 {
   89     unsigned port=COM_BASE;
   90 
   91     outb(port+3, 0x80);
   92     outb(port+1, 0);
   93     /* 19200 Baud, if 9600: outb(12,port) */
   94     outb(port, 6);
   95     outb(port+3, 3);
   96     outb(port+1, 0);
   97 }
   98 
   99 static void ser_puts(char *str)
  100 {
  101     char *ptr;
  102 
  103     ser_init();
  104     for (ptr=str;*ptr;++ptr)
  105         ser_putc((int)(*ptr));
  106 }
  107 
  108 static void ser_putc(int c)
  109 {
  110     unsigned port=COM_BASE;
  111 
  112     while ((inb(port+5) & 0x20)==0);
  113     outb(port, c);
  114     if (c==0x0a)
  115     {
  116         while ((inb(port+5) & 0x20)==0);
  117         outb(port, 0x0d);
  118     }
  119 }
  120 
  121 int ser_printf(const char *fmt, ...)
  122 {
  123     va_list args;
  124     int i;
  125 
  126     va_start(args,fmt);
  127     i = vsprintf(strbuf,fmt,args);
  128     ser_puts(strbuf);
  129     va_end(args);
  130     return i;
  131 }
  132 #endif
  133 #endif
  134 
  135 /* controller cnt. */
  136 int gdt_cnt = 0;
  137 /* event buffer */
  138 static gdt_evt_str ebuffer[GDT_MAX_EVENTS];
  139 static int elastidx, eoldidx;
  140 static struct mtx elock;
  141 MTX_SYSINIT(iir_elock, &elock, "iir events", MTX_DEF);
  142 /* statistics */
  143 gdt_statist_t gdt_stat;
  144 
  145 /* Definitions for our use of the SIM private CCB area */
  146 #define ccb_sim_ptr     spriv_ptr0
  147 #define ccb_priority    spriv_field1
  148 
  149 static void     iir_action(struct cam_sim *sim, union ccb *ccb);
  150 static int      iir_intr_locked(struct gdt_softc *gdt);
  151 static void     iir_poll(struct cam_sim *sim);
  152 static void     iir_shutdown(void *arg, int howto);
  153 static void     iir_timeout(void *arg);
  154 
  155 static void     gdt_eval_mapping(u_int32_t size, int *cyls, int *heads, 
  156                                  int *secs);
  157 static int      gdt_internal_cmd(struct gdt_softc *gdt, struct gdt_ccb *gccb, 
  158                                  u_int8_t service, u_int16_t opcode, 
  159                                  u_int32_t arg1, u_int32_t arg2, u_int32_t arg3);
  160 static int      gdt_wait(struct gdt_softc *gdt, struct gdt_ccb *ccb, 
  161                          int timeout);
  162 
  163 static struct gdt_ccb *gdt_get_ccb(struct gdt_softc *gdt);
  164 
  165 static int      gdt_sync_event(struct gdt_softc *gdt, int service, 
  166                                u_int8_t index, struct gdt_ccb *gccb);
  167 static int      gdt_async_event(struct gdt_softc *gdt, int service);
  168 static struct gdt_ccb *gdt_raw_cmd(struct gdt_softc *gdt, 
  169                                    union ccb *ccb);
  170 static struct gdt_ccb *gdt_cache_cmd(struct gdt_softc *gdt, 
  171                                      union ccb *ccb);
  172 static struct gdt_ccb *gdt_ioctl_cmd(struct gdt_softc *gdt, 
  173                                      gdt_ucmd_t *ucmd);
  174 static void     gdt_internal_cache_cmd(struct gdt_softc *gdt, union ccb *ccb);
  175 
  176 static void     gdtmapmem(void *arg, bus_dma_segment_t *dm_segs,
  177                           int nseg, int error);
  178 static void     gdtexecuteccb(void *arg, bus_dma_segment_t *dm_segs,
  179                               int nseg, int error);
  180 
  181 int
  182 iir_init(struct gdt_softc *gdt)
  183 {
  184     u_int16_t cdev_cnt;
  185     int i, id, drv_cyls, drv_hds, drv_secs;
  186     struct gdt_ccb *gccb;
  187 
  188     GDT_DPRINTF(GDT_D_DEBUG, ("iir_init()\n"));
  189 
  190     gdt->sc_state = GDT_POLLING;
  191     gdt_clear_events(); 
  192     bzero(&gdt_stat, sizeof(gdt_statist_t));
  193 
  194     SLIST_INIT(&gdt->sc_free_gccb);
  195     SLIST_INIT(&gdt->sc_pending_gccb);
  196     TAILQ_INIT(&gdt->sc_ccb_queue);
  197     TAILQ_INIT(&gdt->sc_ucmd_queue);
  198 
  199     /* DMA tag for mapping buffers into device visible space. */
  200     if (bus_dma_tag_create(gdt->sc_parent_dmat, /*alignment*/1, /*boundary*/0,
  201                            /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
  202                            /*highaddr*/BUS_SPACE_MAXADDR,
  203                            /*filter*/NULL, /*filterarg*/NULL,
  204                            /*maxsize*/DFLTPHYS,
  205                            /*nsegments*/GDT_MAXSG,
  206                            /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
  207                            /*flags*/BUS_DMA_ALLOCNOW,
  208                            /*lockfunc*/busdma_lock_mutex,
  209                            /*lockarg*/&gdt->sc_lock,
  210                            &gdt->sc_buffer_dmat) != 0) {
  211         device_printf(gdt->sc_devnode,
  212             "bus_dma_tag_create(..., gdt->sc_buffer_dmat) failed\n");
  213         return (1);
  214     }
  215     gdt->sc_init_level++;
  216 
  217     /* DMA tag for our ccb structures */
  218     if (bus_dma_tag_create(gdt->sc_parent_dmat,
  219                            /*alignment*/1,
  220                            /*boundary*/0,
  221                            /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
  222                            /*highaddr*/BUS_SPACE_MAXADDR,
  223                            /*filter*/NULL,
  224                            /*filterarg*/NULL,
  225                            GDT_MAXCMDS * GDT_SCRATCH_SZ, /* maxsize */
  226                            /*nsegments*/1,
  227                            /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
  228                            /*flags*/0, /*lockfunc*/busdma_lock_mutex,
  229                            /*lockarg*/&gdt->sc_lock,
  230                            &gdt->sc_gcscratch_dmat) != 0) {
  231         device_printf(gdt->sc_devnode,
  232             "bus_dma_tag_create(...,gdt->sc_gcscratch_dmat) failed\n");
  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         device_printf(gdt->sc_devnode,
  241             "bus_dmamem_alloc(...,&gdt->sc_gccbs,...) failed\n");
  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         device_printf(gdt->sc_devnode, "no memory for gccbs.\n");
  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_init_mtx(&gccb->gc_timeout, &gdt->sc_lock, 0);
  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);
  280 
  281     /* allocate ccb for gdt_internal_cmd() */
  282     mtx_lock(&gdt->sc_lock);
  283     gccb = gdt_get_ccb(gdt);
  284     if (gccb == NULL) {
  285         mtx_unlock(&gdt->sc_lock);
  286         device_printf(gdt->sc_devnode, "No free command index found\n");
  287         return (1);
  288     }
  289     bzero(gccb->gc_cmd, GDT_CMD_SZ);
  290 
  291     if (!gdt_internal_cmd(gdt, gccb, GDT_SCREENSERVICE, GDT_INIT, 
  292                           0, 0, 0)) {
  293         device_printf(gdt->sc_devnode,
  294             "Screen service initialization error %d\n", gdt->sc_status);
  295         gdt_free_ccb(gdt, gccb);
  296         mtx_unlock(&gdt->sc_lock);
  297         return (1);
  298     }
  299 
  300     gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_UNFREEZE_IO,
  301                      0, 0, 0);
  302 
  303     if (!gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_INIT, 
  304                           GDT_LINUX_OS, 0, 0)) {
  305         device_printf(gdt->sc_devnode, "Cache service initialization error %d\n",
  306                gdt->sc_status);
  307         gdt_free_ccb(gdt, gccb);
  308         mtx_unlock(&gdt->sc_lock);
  309         return (1);
  310     }
  311     cdev_cnt = (u_int16_t)gdt->sc_info;
  312     gdt->sc_fw_vers = gdt->sc_service;
  313 
  314     /* Detect number of buses */
  315     gdt_enc32(gccb->gc_scratch + GDT_IOC_VERSION, GDT_IOC_NEWEST);
  316     gccb->gc_scratch[GDT_IOC_LIST_ENTRIES] = GDT_MAXBUS;
  317     gccb->gc_scratch[GDT_IOC_FIRST_CHAN] = 0;
  318     gccb->gc_scratch[GDT_IOC_LAST_CHAN] = GDT_MAXBUS - 1;
  319     gdt_enc32(gccb->gc_scratch + GDT_IOC_LIST_OFFSET, GDT_IOC_HDR_SZ);
  320     if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_IOCTL,
  321                          GDT_IOCHAN_RAW_DESC, GDT_INVALID_CHANNEL,
  322                          GDT_IOC_HDR_SZ + GDT_MAXBUS * GDT_RAWIOC_SZ)) {
  323         gdt->sc_bus_cnt = gccb->gc_scratch[GDT_IOC_CHAN_COUNT];
  324         for (i = 0; i < gdt->sc_bus_cnt; i++) {
  325             id = gccb->gc_scratch[GDT_IOC_HDR_SZ +
  326                                  i * GDT_RAWIOC_SZ + GDT_RAWIOC_PROC_ID];
  327             gdt->sc_bus_id[i] = id < GDT_MAXID_FC ? id : 0xff;
  328         }
  329     } else {
  330         /* New method failed, use fallback. */
  331         for (i = 0; i < GDT_MAXBUS; i++) {
  332             gdt_enc32(gccb->gc_scratch + GDT_GETCH_CHANNEL_NO, i);
  333             if (!gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_IOCTL,
  334                                   GDT_SCSI_CHAN_CNT | GDT_L_CTRL_PATTERN,
  335                                   GDT_IO_CHANNEL | GDT_INVALID_CHANNEL,
  336                                   GDT_GETCH_SZ)) {
  337                 if (i == 0) {
  338                     device_printf(gdt->sc_devnode, "Cannot get channel count, "
  339                            "error %d\n", gdt->sc_status);
  340                     gdt_free_ccb(gdt, gccb);
  341                     mtx_unlock(&gdt->sc_lock);
  342                     return (1);
  343                 }
  344                 break;
  345             }
  346             gdt->sc_bus_id[i] =
  347                 (gccb->gc_scratch[GDT_GETCH_SIOP_ID] < GDT_MAXID_FC) ?
  348                 gccb->gc_scratch[GDT_GETCH_SIOP_ID] : 0xff;
  349         }
  350         gdt->sc_bus_cnt = i;
  351     }
  352     /* add one "virtual" channel for the host drives */
  353     gdt->sc_virt_bus = gdt->sc_bus_cnt;
  354     gdt->sc_bus_cnt++;
  355 
  356     if (!gdt_internal_cmd(gdt, gccb, GDT_SCSIRAWSERVICE, GDT_INIT, 
  357                           0, 0, 0)) {
  358             device_printf(gdt->sc_devnode,
  359                 "Raw service initialization error %d\n", gdt->sc_status);
  360             gdt_free_ccb(gdt, gccb);
  361             mtx_unlock(&gdt->sc_lock);
  362             return (1);
  363     }
  364 
  365     /* Set/get features raw service (scatter/gather) */
  366     gdt->sc_raw_feat = 0;
  367     if (gdt_internal_cmd(gdt, gccb, GDT_SCSIRAWSERVICE, GDT_SET_FEAT,
  368                          GDT_SCATTER_GATHER, 0, 0)) {
  369         if (gdt_internal_cmd(gdt, gccb, GDT_SCSIRAWSERVICE, GDT_GET_FEAT, 
  370                              0, 0, 0)) {
  371             gdt->sc_raw_feat = gdt->sc_info;
  372             if (!(gdt->sc_info & GDT_SCATTER_GATHER)) {
  373                 panic("%s: Scatter/Gather Raw Service "
  374                     "required but not supported!\n",
  375                     device_get_nameunit(gdt->sc_devnode));
  376                 gdt_free_ccb(gdt, gccb);
  377                 mtx_unlock(&gdt->sc_lock);
  378                 return (1);
  379             }
  380         }
  381     }
  382 
  383     /* Set/get features cache service (scatter/gather) */
  384     gdt->sc_cache_feat = 0;
  385     if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_SET_FEAT, 
  386                          0, GDT_SCATTER_GATHER, 0)) {
  387         if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_GET_FEAT, 
  388                              0, 0, 0)) {
  389             gdt->sc_cache_feat = gdt->sc_info;
  390             if (!(gdt->sc_info & GDT_SCATTER_GATHER)) {
  391                 panic("%s: Scatter/Gather Cache Service "
  392                     "required but not supported!\n",
  393                     device_get_nameunit(gdt->sc_devnode));
  394                 gdt_free_ccb(gdt, gccb);
  395                 mtx_unlock(&gdt->sc_lock);
  396                 return (1);
  397             }
  398         }
  399     }
  400 
  401     /* OEM */
  402     gdt_enc32(gccb->gc_scratch + GDT_OEM_VERSION, 0x01);
  403     gdt_enc32(gccb->gc_scratch + GDT_OEM_BUFSIZE, sizeof(gdt_oem_record_t));
  404     if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_IOCTL,
  405                          GDT_OEM_STR_RECORD, GDT_INVALID_CHANNEL,
  406                          sizeof(gdt_oem_str_record_t))) {
  407             strncpy(gdt->oem_name, ((gdt_oem_str_record_t *)
  408             gccb->gc_scratch)->text.scsi_host_drive_inquiry_vendor_id, 7);
  409                 gdt->oem_name[7]='\0';
  410         } else {
  411                 /* Old method, based on PCI ID */
  412                 if (gdt->sc_vendor == INTEL_VENDOR_ID_IIR)
  413             strcpy(gdt->oem_name,"Intel  ");
  414         else 
  415             strcpy(gdt->oem_name,"ICP    ");
  416     }
  417 
  418     /* Scan for cache devices */
  419     for (i = 0; i < cdev_cnt && i < GDT_MAX_HDRIVES; i++) {
  420         if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE, GDT_INFO, 
  421                              i, 0, 0)) {
  422             gdt->sc_hdr[i].hd_present = 1;
  423             gdt->sc_hdr[i].hd_size = gdt->sc_info;
  424             
  425             /*
  426              * Evaluate mapping (sectors per head, heads per cyl)
  427              */
  428             gdt->sc_hdr[i].hd_size &= ~GDT_SECS32;
  429             if (gdt->sc_info2 == 0)
  430                 gdt_eval_mapping(gdt->sc_hdr[i].hd_size,
  431                                  &drv_cyls, &drv_hds, &drv_secs);
  432             else {
  433                 drv_hds = gdt->sc_info2 & 0xff;
  434                 drv_secs = (gdt->sc_info2 >> 8) & 0xff;
  435                 drv_cyls = gdt->sc_hdr[i].hd_size / drv_hds /
  436                     drv_secs;
  437             }
  438             gdt->sc_hdr[i].hd_heads = drv_hds;
  439             gdt->sc_hdr[i].hd_secs = drv_secs;
  440             /* Round the size */
  441             gdt->sc_hdr[i].hd_size = drv_cyls * drv_hds * drv_secs;
  442             
  443             if (gdt_internal_cmd(gdt, gccb, GDT_CACHESERVICE,
  444                                  GDT_DEVTYPE, i, 0, 0))
  445                 gdt->sc_hdr[i].hd_devtype = gdt->sc_info;
  446         }
  447     }
  448     
  449     GDT_DPRINTF(GDT_D_INIT, ("dpmem %x %d-bus %d cache device%s\n", 
  450                              gdt->sc_dpmembase,
  451                              gdt->sc_bus_cnt, cdev_cnt, 
  452                              cdev_cnt == 1 ? "" : "s"));
  453     gdt_free_ccb(gdt, gccb);
  454     mtx_unlock(&gdt->sc_lock);
  455 
  456     atomic_add_int(&gdt_cnt, 1);
  457     return (0);
  458 }
  459 
  460 void
  461 iir_free(struct gdt_softc *gdt)
  462 {
  463     int i;
  464 
  465     GDT_DPRINTF(GDT_D_INIT, ("iir_free()\n"));
  466 
  467     switch (gdt->sc_init_level) {
  468       default:
  469         gdt_destroy_dev(gdt->sc_dev);
  470       case 5:
  471         for (i = GDT_MAXCMDS-1; i >= 0; i--) 
  472             if (gdt->sc_gccbs[i].gc_map_flag) {
  473                 callout_drain(&gdt->sc_gccbs[i].gc_timeout);
  474                 bus_dmamap_destroy(gdt->sc_buffer_dmat,
  475                                    gdt->sc_gccbs[i].gc_dmamap);
  476             }
  477         bus_dmamap_unload(gdt->sc_gcscratch_dmat, gdt->sc_gcscratch_dmamap);
  478         free(gdt->sc_gccbs, M_GDTBUF);
  479       case 4:
  480         bus_dmamem_free(gdt->sc_gcscratch_dmat, gdt->sc_gcscratch, gdt->sc_gcscratch_dmamap);
  481       case 3:
  482         bus_dma_tag_destroy(gdt->sc_gcscratch_dmat);
  483       case 2:
  484         bus_dma_tag_destroy(gdt->sc_buffer_dmat);
  485       case 1:
  486         bus_dma_tag_destroy(gdt->sc_parent_dmat);
  487       case 0:
  488         break;
  489     }
  490 }
  491 
  492 void
  493 iir_attach(struct gdt_softc *gdt)
  494 {
  495     struct cam_devq *devq;
  496     int i;
  497 
  498     GDT_DPRINTF(GDT_D_INIT, ("iir_attach()\n"));
  499 
  500     /*
  501      * Create the device queue for our SIM.
  502      * XXX Throttle this down since the card has problems under load.
  503      */
  504     devq = cam_simq_alloc(32);
  505     if (devq == NULL)
  506         return;
  507 
  508     for (i = 0; i < gdt->sc_bus_cnt; i++) {
  509         /*
  510          * Construct our SIM entry
  511          */
  512         gdt->sims[i] = cam_sim_alloc(iir_action, iir_poll, "iir",
  513             gdt, device_get_unit(gdt->sc_devnode), &gdt->sc_lock,
  514             /*untagged*/1, /*tagged*/GDT_MAXCMDS, devq);
  515         mtx_lock(&gdt->sc_lock);
  516         if (xpt_bus_register(gdt->sims[i], gdt->sc_devnode, i) != CAM_SUCCESS) {
  517             cam_sim_free(gdt->sims[i], /*free_devq*/i == 0);
  518             mtx_unlock(&gdt->sc_lock);
  519             break;
  520         }
  521 
  522         if (xpt_create_path(&gdt->paths[i], /*periph*/NULL,
  523                             cam_sim_path(gdt->sims[i]),
  524                             CAM_TARGET_WILDCARD,
  525                             CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  526             xpt_bus_deregister(cam_sim_path(gdt->sims[i]));
  527             cam_sim_free(gdt->sims[i], /*free_devq*/i == 0);
  528             mtx_unlock(&gdt->sc_lock);
  529             break;
  530         }
  531         mtx_unlock(&gdt->sc_lock);
  532     }
  533     if (i > 0)
  534         EVENTHANDLER_REGISTER(shutdown_final, iir_shutdown,
  535                               gdt, SHUTDOWN_PRI_DEFAULT);
  536     /* iir_watchdog(gdt); */
  537     gdt->sc_state = GDT_NORMAL;
  538 }
  539 
  540 static void
  541 gdt_eval_mapping(u_int32_t size, int *cyls, int *heads, int *secs)
  542 {
  543     *cyls = size / GDT_HEADS / GDT_SECS;
  544     if (*cyls < GDT_MAXCYLS) {
  545         *heads = GDT_HEADS;
  546         *secs = GDT_SECS;
  547     } else {
  548         /* Too high for 64 * 32 */
  549         *cyls = size / GDT_MEDHEADS / GDT_MEDSECS;
  550         if (*cyls < GDT_MAXCYLS) {
  551             *heads = GDT_MEDHEADS;
  552             *secs = GDT_MEDSECS;
  553         } else {
  554             /* Too high for 127 * 63 */
  555             *cyls = size / GDT_BIGHEADS / GDT_BIGSECS;
  556             *heads = GDT_BIGHEADS;
  557             *secs = GDT_BIGSECS;
  558         }
  559     }
  560 }
  561 
  562 static int
  563 gdt_wait(struct gdt_softc *gdt, struct gdt_ccb *gccb, 
  564          int timeout)
  565 {
  566     int rv = 0;
  567 
  568     GDT_DPRINTF(GDT_D_INIT,
  569                 ("gdt_wait(%p, %p, %d)\n", gdt, gccb, timeout));
  570 
  571     gdt->sc_state |= GDT_POLL_WAIT;
  572     do {
  573         if (iir_intr_locked(gdt) == gccb->gc_cmd_index) {
  574             rv = 1;
  575             break;
  576         }
  577         DELAY(1);
  578     } while (--timeout);
  579     gdt->sc_state &= ~GDT_POLL_WAIT;
  580     
  581     while (gdt->sc_test_busy(gdt))
  582         DELAY(1);               /* XXX correct? */
  583 
  584     return (rv);
  585 }
  586 
  587 static int
  588 gdt_internal_cmd(struct gdt_softc *gdt, struct gdt_ccb *gccb,
  589                  u_int8_t service, u_int16_t opcode, 
  590                  u_int32_t arg1, u_int32_t arg2, u_int32_t arg3)
  591 {
  592     int retries;
  593     
  594     GDT_DPRINTF(GDT_D_CMD, ("gdt_internal_cmd(%p, %d, %d, %d, %d, %d)\n",
  595                             gdt, service, opcode, arg1, arg2, arg3));
  596 
  597     bzero(gccb->gc_cmd, GDT_CMD_SZ);
  598 
  599     for (retries = GDT_RETRIES; ; ) {
  600         gccb->gc_service = service;
  601         gccb->gc_flags = GDT_GCF_INTERNAL;
  602         
  603         gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
  604                   gccb->gc_cmd_index);
  605         gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, opcode);
  606 
  607         switch (service) {
  608           case GDT_CACHESERVICE:
  609             if (opcode == GDT_IOCTL) {
  610                 gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION +
  611                           GDT_IOCTL_SUBFUNC, arg1);
  612                 gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION +
  613                           GDT_IOCTL_CHANNEL, arg2);
  614                 gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION +
  615                           GDT_IOCTL_PARAM_SIZE, (u_int16_t)arg3);
  616                 gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_P_PARAM,
  617                           gccb->gc_scratch_busbase);
  618             } else {
  619                 gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION +
  620                           GDT_CACHE_DEVICENO, (u_int16_t)arg1);
  621                 gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION +
  622                           GDT_CACHE_BLOCKNO, arg2);
  623             }
  624             break;
  625 
  626           case GDT_SCSIRAWSERVICE:
  627             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION +
  628                       GDT_RAW_DIRECTION, arg1);
  629             gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_BUS] =
  630                 (u_int8_t)arg2;
  631             gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_TARGET] =
  632                 (u_int8_t)arg3;
  633             gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_LUN] =
  634                 (u_int8_t)(arg3 >> 8);
  635         }
  636 
  637         gdt->sc_set_sema0(gdt);
  638         gccb->gc_cmd_len = GDT_CMD_SZ;
  639         gdt->sc_cmd_off = 0;
  640         gdt->sc_cmd_cnt = 0;
  641         gdt->sc_copy_cmd(gdt, gccb);
  642         gdt->sc_release_event(gdt);
  643         DELAY(20);
  644         if (!gdt_wait(gdt, gccb, GDT_POLL_TIMEOUT))
  645             return (0);
  646         if (gdt->sc_status != GDT_S_BSY || --retries == 0)
  647             break;
  648         DELAY(1);
  649     }
  650     return (gdt->sc_status == GDT_S_OK);
  651 }
  652 
  653 static struct gdt_ccb *
  654 gdt_get_ccb(struct gdt_softc *gdt)
  655 {
  656     struct gdt_ccb *gccb;
  657     
  658     GDT_DPRINTF(GDT_D_QUEUE, ("gdt_get_ccb(%p)\n", gdt));
  659 
  660     mtx_assert(&gdt->sc_lock, MA_OWNED);
  661     gccb = SLIST_FIRST(&gdt->sc_free_gccb);
  662     if (gccb != NULL) {
  663         SLIST_REMOVE_HEAD(&gdt->sc_free_gccb, sle);
  664         SLIST_INSERT_HEAD(&gdt->sc_pending_gccb, gccb, sle);
  665         ++gdt_stat.cmd_index_act;
  666         if (gdt_stat.cmd_index_act > gdt_stat.cmd_index_max)
  667             gdt_stat.cmd_index_max = gdt_stat.cmd_index_act;
  668     }
  669     return (gccb);
  670 }
  671 
  672 void
  673 gdt_free_ccb(struct gdt_softc *gdt, struct gdt_ccb *gccb)
  674 {
  675 
  676     GDT_DPRINTF(GDT_D_QUEUE, ("gdt_free_ccb(%p, %p)\n", gdt, gccb));
  677 
  678     mtx_assert(&gdt->sc_lock, MA_OWNED);
  679     gccb->gc_flags = GDT_GCF_UNUSED;
  680     SLIST_REMOVE(&gdt->sc_pending_gccb, gccb, gdt_ccb, sle);
  681     SLIST_INSERT_HEAD(&gdt->sc_free_gccb, gccb, sle);
  682     --gdt_stat.cmd_index_act;
  683     if (gdt->sc_state & GDT_SHUTDOWN)
  684         wakeup(gccb);
  685 }
  686 
  687 void    
  688 gdt_next(struct gdt_softc *gdt)
  689 {
  690     union ccb *ccb;
  691     gdt_ucmd_t *ucmd;
  692     struct cam_sim *sim;
  693     int bus, target, lun;
  694     int next_cmd;
  695 
  696     struct ccb_scsiio *csio;
  697     struct ccb_hdr *ccbh;
  698     struct gdt_ccb *gccb = NULL;
  699     u_int8_t cmd;
  700 
  701     GDT_DPRINTF(GDT_D_QUEUE, ("gdt_next(%p)\n", gdt));
  702 
  703     mtx_assert(&gdt->sc_lock, MA_OWNED);
  704     if (gdt->sc_test_busy(gdt)) {
  705         if (!(gdt->sc_state & GDT_POLLING)) {
  706             return;
  707         }
  708         while (gdt->sc_test_busy(gdt))
  709             DELAY(1);
  710     }
  711 
  712     gdt->sc_cmd_cnt = gdt->sc_cmd_off = 0;
  713     next_cmd = TRUE;
  714     for (;;) {
  715         /* I/Os in queue? controller ready? */
  716         if (!TAILQ_FIRST(&gdt->sc_ucmd_queue) &&
  717             !TAILQ_FIRST(&gdt->sc_ccb_queue))
  718             break;
  719 
  720         /* 1.: I/Os without ccb (IOCTLs) */
  721         ucmd = TAILQ_FIRST(&gdt->sc_ucmd_queue);
  722         if (ucmd != NULL) {
  723             TAILQ_REMOVE(&gdt->sc_ucmd_queue, ucmd, links);
  724             if ((gccb = gdt_ioctl_cmd(gdt, ucmd)) == NULL) {
  725                 TAILQ_INSERT_HEAD(&gdt->sc_ucmd_queue, ucmd, links);
  726                 break;
  727             }
  728             break;      
  729             /* wenn mehrere Kdos. zulassen: if (!gdt_polling) continue; */
  730         }
  731 
  732         /* 2.: I/Os with ccb */
  733         ccb = (union ccb *)TAILQ_FIRST(&gdt->sc_ccb_queue); 
  734         /* ist dann immer != NULL, da oben getestet */
  735         sim = (struct cam_sim *)ccb->ccb_h.ccb_sim_ptr;
  736         bus = cam_sim_bus(sim);
  737         target = ccb->ccb_h.target_id;
  738         lun = ccb->ccb_h.target_lun;
  739     
  740         TAILQ_REMOVE(&gdt->sc_ccb_queue, &ccb->ccb_h, sim_links.tqe);
  741         --gdt_stat.req_queue_act;
  742         /* ccb->ccb_h.func_code is XPT_SCSI_IO */
  743         GDT_DPRINTF(GDT_D_QUEUE, ("XPT_SCSI_IO flags 0x%x)\n", 
  744                                   ccb->ccb_h.flags));
  745         csio = &ccb->csio;
  746         ccbh = &ccb->ccb_h;
  747         cmd  = csio->cdb_io.cdb_bytes[0];
  748         /* Max CDB length is 12 bytes */
  749         if (csio->cdb_len > 12) { 
  750             ccbh->status = CAM_REQ_INVALID;
  751             --gdt_stat.io_count_act;
  752             xpt_done(ccb);
  753         } else if (bus != gdt->sc_virt_bus) {
  754             /* raw service command */
  755             if ((gccb = gdt_raw_cmd(gdt, ccb)) == NULL) {
  756                 TAILQ_INSERT_HEAD(&gdt->sc_ccb_queue, &ccb->ccb_h, 
  757                                   sim_links.tqe);
  758                 ++gdt_stat.req_queue_act;
  759                 if (gdt_stat.req_queue_act > gdt_stat.req_queue_max)
  760                     gdt_stat.req_queue_max = gdt_stat.req_queue_act;
  761                 next_cmd = FALSE;
  762             }
  763         } else if (target >= GDT_MAX_HDRIVES || 
  764                    !gdt->sc_hdr[target].hd_present || lun != 0) {
  765             ccbh->status = CAM_DEV_NOT_THERE;
  766             --gdt_stat.io_count_act;
  767             xpt_done(ccb);
  768         } else {
  769             /* cache service command */
  770             if (cmd == READ_6  || cmd == WRITE_6 ||
  771                 cmd == READ_10 || cmd == WRITE_10) {
  772                 if ((gccb = gdt_cache_cmd(gdt, ccb)) == NULL) {
  773                     TAILQ_INSERT_HEAD(&gdt->sc_ccb_queue, &ccb->ccb_h, 
  774                                       sim_links.tqe);
  775                     ++gdt_stat.req_queue_act;
  776                     if (gdt_stat.req_queue_act > gdt_stat.req_queue_max)
  777                         gdt_stat.req_queue_max = gdt_stat.req_queue_act;
  778                     next_cmd = FALSE;
  779                 }
  780             } else {
  781                 gdt_internal_cache_cmd(gdt, ccb);
  782             }
  783         }           
  784         if ((gdt->sc_state & GDT_POLLING) || !next_cmd)
  785             break;
  786     }
  787     if (gdt->sc_cmd_cnt > 0)
  788         gdt->sc_release_event(gdt);
  789 
  790     if ((gdt->sc_state & GDT_POLLING) && gdt->sc_cmd_cnt > 0) {
  791         gdt_wait(gdt, gccb, GDT_POLL_TIMEOUT);
  792     }
  793 }
  794 
  795 static struct gdt_ccb *
  796 gdt_raw_cmd(struct gdt_softc *gdt, union ccb *ccb)
  797 {
  798     struct gdt_ccb *gccb;
  799     struct cam_sim *sim;
  800     int error;
  801 
  802     GDT_DPRINTF(GDT_D_CMD, ("gdt_raw_cmd(%p, %p)\n", gdt, ccb));
  803 
  804     if (roundup(GDT_CMD_UNION + GDT_RAW_SZ, sizeof(u_int32_t)) +
  805         gdt->sc_cmd_off + GDT_DPMEM_COMMAND_OFFSET >
  806         gdt->sc_ic_all_size) {
  807         GDT_DPRINTF(GDT_D_INVALID, ("%s: gdt_raw_cmd(): DPMEM overflow\n", 
  808                 device_get_nameunit(gdt->sc_devnode)));
  809         return (NULL);
  810     }
  811 
  812     gccb = gdt_get_ccb(gdt);
  813     if (gccb == NULL) {
  814         GDT_DPRINTF(GDT_D_INVALID, ("%s: No free command index found\n",
  815                 device_get_nameunit(gdt->sc_devnode)));
  816         return (gccb);
  817     }
  818     bzero(gccb->gc_cmd, GDT_CMD_SZ);
  819     sim = (struct cam_sim *)ccb->ccb_h.ccb_sim_ptr;
  820     gccb->gc_ccb = ccb;
  821     gccb->gc_service = GDT_SCSIRAWSERVICE;
  822     gccb->gc_flags = GDT_GCF_SCSI;
  823         
  824     if (gdt->sc_cmd_cnt == 0)
  825         gdt->sc_set_sema0(gdt);
  826     gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
  827               gccb->gc_cmd_index);
  828     gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, GDT_WRITE);
  829 
  830     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_DIRECTION,
  831               (ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN ?
  832               GDT_DATA_IN : GDT_DATA_OUT);
  833     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SDLEN,
  834               ccb->csio.dxfer_len);
  835     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_CLEN,
  836               ccb->csio.cdb_len);
  837     bcopy(ccb->csio.cdb_io.cdb_bytes, gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_CMD,
  838           ccb->csio.cdb_len);
  839     gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_TARGET] = 
  840         ccb->ccb_h.target_id;
  841     gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_LUN] = 
  842         ccb->ccb_h.target_lun;
  843     gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_BUS] = 
  844         cam_sim_bus(sim);
  845     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SENSE_LEN,
  846               sizeof(struct scsi_sense_data));
  847     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SENSE_DATA,
  848               gccb->gc_scratch_busbase);
  849  
  850     error = bus_dmamap_load_ccb(gdt->sc_buffer_dmat,
  851                                 gccb->gc_dmamap,
  852                                 ccb,
  853                                 gdtexecuteccb,
  854                                 gccb, /*flags*/0);
  855     if (error == EINPROGRESS) {
  856         xpt_freeze_simq(sim, 1);
  857         gccb->gc_ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  858     }
  859 
  860     return (gccb);
  861 }
  862 
  863 static struct gdt_ccb *
  864 gdt_cache_cmd(struct gdt_softc *gdt, union ccb *ccb)
  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, ("%s: gdt_cache_cmd(): DPMEM overflow\n", 
  879                 device_get_nameunit(gdt->sc_devnode)));
  880         return (NULL);
  881     }
  882 
  883     gccb = gdt_get_ccb(gdt);
  884     if (gccb == NULL) {
  885         GDT_DPRINTF(GDT_D_DEBUG, ("%s: No free command index found\n",
  886                 device_get_nameunit(gdt->sc_devnode)));
  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     gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
  898               gccb->gc_cmd_index);
  899     cmdp = ccb->csio.cdb_io.cdb_bytes;
  900     opcode = (*cmdp == WRITE_6 || *cmdp == WRITE_10) ? GDT_WRITE : GDT_READ;
  901     if ((gdt->sc_state & GDT_SHUTDOWN) && opcode == GDT_WRITE)
  902         opcode = GDT_WRITE_THR;
  903     gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, opcode);
  904  
  905     gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_DEVICENO,
  906               ccb->ccb_h.target_id);
  907     if (ccb->csio.cdb_len == 6) {
  908         struct scsi_rw_6 *rw = (struct scsi_rw_6 *)cmdp;
  909         blockno = scsi_3btoul(rw->addr) & ((SRW_TOPADDR<<16) | 0xffff);
  910         blockcnt = rw->length ? rw->length : 0x100;
  911     } else {
  912         struct scsi_rw_10 *rw = (struct scsi_rw_10 *)cmdp;
  913         blockno = scsi_4btoul(rw->addr);
  914         blockcnt = scsi_2btoul(rw->length);
  915     }
  916     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_BLOCKNO,
  917               blockno);
  918     gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_BLOCKCNT,
  919               blockcnt);
  920 
  921     error = bus_dmamap_load_ccb(gdt->sc_buffer_dmat,
  922                                 gccb->gc_dmamap,
  923                                 ccb,
  924                                 gdtexecuteccb,
  925                                 gccb, /*flags*/0);
  926     if (error == EINPROGRESS) {
  927         xpt_freeze_simq(sim, 1);
  928         gccb->gc_ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  929     }
  930     return (gccb);
  931 }
  932 
  933 static struct gdt_ccb *
  934 gdt_ioctl_cmd(struct gdt_softc *gdt, gdt_ucmd_t *ucmd)
  935 {
  936     struct gdt_ccb *gccb;
  937     u_int32_t cnt;
  938 
  939     GDT_DPRINTF(GDT_D_DEBUG, ("gdt_ioctl_cmd(%p, %p)\n", gdt, ucmd));
  940 
  941     gccb = gdt_get_ccb(gdt);
  942     if (gccb == NULL) {
  943         GDT_DPRINTF(GDT_D_DEBUG, ("%s: No free command index found\n",
  944                 device_get_nameunit(gdt->sc_devnode)));
  945         return (gccb);
  946     }
  947     bzero(gccb->gc_cmd, GDT_CMD_SZ);
  948     gccb->gc_ucmd = ucmd;
  949     gccb->gc_service = ucmd->service;
  950     gccb->gc_flags = GDT_GCF_IOCTL;
  951         
  952     /* check DPMEM space, copy data buffer from user space */
  953     if (ucmd->service == GDT_CACHESERVICE) {
  954         if (ucmd->OpCode == GDT_IOCTL) {
  955             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_IOCTL_SZ,
  956                                       sizeof(u_int32_t));
  957             cnt = ucmd->u.ioctl.param_size;
  958             if (cnt > GDT_SCRATCH_SZ) {
  959                 device_printf(gdt->sc_devnode,
  960                     "Scratch buffer too small (%d/%d)\n", GDT_SCRATCH_SZ, cnt);
  961                 gdt_free_ccb(gdt, gccb);
  962                 return (NULL);
  963             }
  964         } else {
  965             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_CACHE_SG_LST +
  966                                       GDT_SG_SZ, sizeof(u_int32_t));
  967             cnt = ucmd->u.cache.BlockCnt * GDT_SECTOR_SIZE;
  968             if (cnt > GDT_SCRATCH_SZ) {
  969                 device_printf(gdt->sc_devnode,
  970                     "Scratch buffer too small (%d/%d)\n", GDT_SCRATCH_SZ, cnt);
  971                 gdt_free_ccb(gdt, gccb);
  972                 return (NULL);
  973             }
  974         }
  975     } else {
  976         gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_RAW_SG_LST +
  977                                   GDT_SG_SZ, sizeof(u_int32_t));
  978         cnt = ucmd->u.raw.sdlen;
  979         if (cnt + ucmd->u.raw.sense_len > GDT_SCRATCH_SZ) {
  980             device_printf(gdt->sc_devnode, "Scratch buffer too small (%d/%d)\n", 
  981                 GDT_SCRATCH_SZ, cnt + ucmd->u.raw.sense_len);
  982             gdt_free_ccb(gdt, gccb);
  983             return (NULL);
  984         }
  985     }
  986     if (cnt != 0) 
  987         bcopy(ucmd->data, gccb->gc_scratch, cnt);
  988 
  989     if (gdt->sc_cmd_off + gccb->gc_cmd_len + GDT_DPMEM_COMMAND_OFFSET >
  990         gdt->sc_ic_all_size) {
  991         GDT_DPRINTF(GDT_D_INVALID, ("%s: gdt_ioctl_cmd(): DPMEM overflow\n", 
  992                 device_get_nameunit(gdt->sc_devnode)));
  993         gdt_free_ccb(gdt, gccb);
  994         return (NULL);
  995     }
  996 
  997     if (gdt->sc_cmd_cnt == 0)
  998         gdt->sc_set_sema0(gdt);
  999 
 1000     /* fill cmd structure */
 1001     gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
 1002               gccb->gc_cmd_index);
 1003     gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, 
 1004               ucmd->OpCode);
 1005 
 1006     if (ucmd->service == GDT_CACHESERVICE) {
 1007         if (ucmd->OpCode == GDT_IOCTL) {
 1008             /* IOCTL */
 1009             gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_PARAM_SIZE,
 1010                       ucmd->u.ioctl.param_size);
 1011             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_SUBFUNC,
 1012                       ucmd->u.ioctl.subfunc);
 1013             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_CHANNEL,
 1014                       ucmd->u.ioctl.channel);
 1015             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_IOCTL_P_PARAM,
 1016                       gccb->gc_scratch_busbase);
 1017         } else {
 1018             /* cache service command */
 1019             gdt_enc16(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_DEVICENO,
 1020                       ucmd->u.cache.DeviceNo);
 1021             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_BLOCKNO,
 1022                       ucmd->u.cache.BlockNo);
 1023             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_BLOCKCNT,
 1024                       ucmd->u.cache.BlockCnt);
 1025             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_DESTADDR,
 1026                       0xffffffffUL);
 1027             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_CANZ,
 1028                       1);
 1029             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_LST + 
 1030                       GDT_SG_PTR, gccb->gc_scratch_busbase);
 1031             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_LST +
 1032                       GDT_SG_LEN, ucmd->u.cache.BlockCnt * GDT_SECTOR_SIZE);
 1033         }
 1034     } else {
 1035         /* raw service command */
 1036         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_DIRECTION,
 1037                   ucmd->u.raw.direction);
 1038         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SDATA,
 1039                   0xffffffffUL);
 1040         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SDLEN,
 1041                   ucmd->u.raw.sdlen);
 1042         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_CLEN,
 1043                   ucmd->u.raw.clen);
 1044         bcopy(ucmd->u.raw.cmd, gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_CMD,
 1045               12);
 1046         gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_TARGET] = 
 1047             ucmd->u.raw.target;
 1048         gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_LUN] = 
 1049             ucmd->u.raw.lun;
 1050         gccb->gc_cmd[GDT_CMD_UNION + GDT_RAW_BUS] = 
 1051             ucmd->u.raw.bus;
 1052         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SENSE_LEN,
 1053                   ucmd->u.raw.sense_len);
 1054         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SENSE_DATA,
 1055                   gccb->gc_scratch_busbase + ucmd->u.raw.sdlen);
 1056         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_RANZ,
 1057                   1);
 1058         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_LST + 
 1059                   GDT_SG_PTR, gccb->gc_scratch_busbase);
 1060         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_LST +
 1061                   GDT_SG_LEN, ucmd->u.raw.sdlen);
 1062     }
 1063 
 1064     gdt_stat.sg_count_act = 1;
 1065     gdt->sc_copy_cmd(gdt, gccb);
 1066     return (gccb);
 1067 }
 1068 
 1069 static void 
 1070 gdt_internal_cache_cmd(struct gdt_softc *gdt,union ccb *ccb)
 1071 {
 1072     int t;
 1073 
 1074     t = ccb->ccb_h.target_id;
 1075     GDT_DPRINTF(GDT_D_CMD, ("gdt_internal_cache_cmd(%p, %p, 0x%x, %d)\n", 
 1076         gdt, ccb, ccb->csio.cdb_io.cdb_bytes[0], t));
 1077 
 1078     switch (ccb->csio.cdb_io.cdb_bytes[0]) {
 1079       case TEST_UNIT_READY:
 1080       case START_STOP:
 1081         break;
 1082       case REQUEST_SENSE:
 1083         GDT_DPRINTF(GDT_D_MISC, ("REQUEST_SENSE\n"));
 1084         break;
 1085       case INQUIRY:
 1086         {
 1087             struct scsi_inquiry_data inq;
 1088             size_t copylen = MIN(sizeof(inq), ccb->csio.dxfer_len);
 1089 
 1090             bzero(&inq, sizeof(inq));
 1091             inq.device = (gdt->sc_hdr[t].hd_devtype & 4) ?
 1092                 T_CDROM : T_DIRECT;
 1093             inq.dev_qual2 = (gdt->sc_hdr[t].hd_devtype & 1) ? 0x80 : 0;
 1094             inq.version = SCSI_REV_2;
 1095             inq.response_format = 2; 
 1096             inq.additional_length = 32; 
 1097             inq.flags = SID_CmdQue | SID_Sync; 
 1098             strncpy(inq.vendor, gdt->oem_name, sizeof(inq.vendor));
 1099             snprintf(inq.product, sizeof(inq.product),
 1100                      "Host Drive   #%02d", t);
 1101             strncpy(inq.revision, "   ", sizeof(inq.revision));
 1102             bcopy(&inq, ccb->csio.data_ptr, copylen );
 1103             if( ccb->csio.dxfer_len > copylen )
 1104                 bzero( ccb->csio.data_ptr+copylen,
 1105                        ccb->csio.dxfer_len - copylen );
 1106             break;
 1107         }
 1108       case MODE_SENSE_6:
 1109         {
 1110             struct mpd_data {
 1111                 struct scsi_mode_hdr_6 hd;
 1112                 struct scsi_mode_block_descr bd;
 1113                 struct scsi_control_page cp;
 1114             } mpd;
 1115             size_t copylen = MIN(sizeof(mpd), ccb->csio.dxfer_len);
 1116             u_int8_t page;
 1117 
 1118             /*mpd = (struct mpd_data *)ccb->csio.data_ptr;*/
 1119             bzero(&mpd, sizeof(mpd));
 1120             mpd.hd.datalen = sizeof(struct scsi_mode_hdr_6) +
 1121                 sizeof(struct scsi_mode_block_descr);
 1122             mpd.hd.dev_specific = (gdt->sc_hdr[t].hd_devtype & 2) ? 0x80 : 0;
 1123             mpd.hd.block_descr_len = sizeof(struct scsi_mode_block_descr);
 1124             mpd.bd.block_len[0] = (GDT_SECTOR_SIZE & 0x00ff0000) >> 16;
 1125             mpd.bd.block_len[1] = (GDT_SECTOR_SIZE & 0x0000ff00) >> 8;
 1126             mpd.bd.block_len[2] = (GDT_SECTOR_SIZE & 0x000000ff);
 1127 
 1128             bcopy(&mpd, ccb->csio.data_ptr, copylen );
 1129             if( ccb->csio.dxfer_len > copylen )
 1130                 bzero( ccb->csio.data_ptr+copylen,
 1131                        ccb->csio.dxfer_len - copylen );
 1132             page=((struct scsi_mode_sense_6 *)ccb->csio.cdb_io.cdb_bytes)->page;
 1133             switch (page) {
 1134               default:
 1135                 GDT_DPRINTF(GDT_D_MISC, ("MODE_SENSE_6: page 0x%x\n", page));
 1136                 break;
 1137             }
 1138             break;
 1139         }
 1140       case READ_CAPACITY:
 1141         {
 1142             struct scsi_read_capacity_data rcd;
 1143             size_t copylen = MIN(sizeof(rcd), ccb->csio.dxfer_len);
 1144               
 1145             /*rcd = (struct scsi_read_capacity_data *)ccb->csio.data_ptr;*/
 1146             bzero(&rcd, sizeof(rcd));
 1147             scsi_ulto4b(gdt->sc_hdr[t].hd_size - 1, rcd.addr);
 1148             scsi_ulto4b(GDT_SECTOR_SIZE, rcd.length);
 1149             bcopy(&rcd, ccb->csio.data_ptr, copylen );
 1150             if( ccb->csio.dxfer_len > copylen )
 1151                 bzero( ccb->csio.data_ptr+copylen,
 1152                        ccb->csio.dxfer_len - copylen );
 1153             break;
 1154         }
 1155       default:
 1156         GDT_DPRINTF(GDT_D_MISC, ("gdt_internal_cache_cmd(%d) unknown\n", 
 1157                                     ccb->csio.cdb_io.cdb_bytes[0]));
 1158         break;
 1159     }
 1160     ccb->ccb_h.status |= CAM_REQ_CMP;
 1161     --gdt_stat.io_count_act;
 1162     xpt_done(ccb);
 1163 }
 1164 
 1165 static void     
 1166 gdtmapmem(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 1167 {
 1168     bus_addr_t *busaddrp;
 1169     
 1170     busaddrp = (bus_addr_t *)arg;
 1171     *busaddrp = dm_segs->ds_addr;
 1172 }
 1173 
 1174 static void     
 1175 gdtexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 1176 {
 1177     struct gdt_ccb *gccb;
 1178     union ccb *ccb;
 1179     struct gdt_softc *gdt;
 1180     int i;
 1181 
 1182     gccb = (struct gdt_ccb *)arg;
 1183     ccb = gccb->gc_ccb;
 1184     gdt = cam_sim_softc((struct cam_sim *)ccb->ccb_h.ccb_sim_ptr);
 1185     mtx_assert(&gdt->sc_lock, MA_OWNED);
 1186 
 1187     GDT_DPRINTF(GDT_D_CMD, ("gdtexecuteccb(%p, %p, %p, %d, %d)\n", 
 1188                             gdt, gccb, dm_segs, nseg, error));
 1189     gdt_stat.sg_count_act = nseg;
 1190     if (nseg > gdt_stat.sg_count_max)
 1191         gdt_stat.sg_count_max = nseg;
 1192 
 1193     /* Copy the segments into our SG list */
 1194     if (gccb->gc_service == GDT_CACHESERVICE) {
 1195         for (i = 0; i < nseg; ++i) {
 1196             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_LST +
 1197                       i * GDT_SG_SZ + GDT_SG_PTR, dm_segs->ds_addr);
 1198             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_LST +
 1199                       i * GDT_SG_SZ + GDT_SG_LEN, dm_segs->ds_len);
 1200             dm_segs++;
 1201         }
 1202         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_SG_CANZ,      
 1203                   nseg);
 1204         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_CACHE_DESTADDR, 
 1205                   0xffffffffUL);
 1206 
 1207         gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_CACHE_SG_LST +
 1208                                   nseg * GDT_SG_SZ, sizeof(u_int32_t));
 1209     } else {
 1210         for (i = 0; i < nseg; ++i) {
 1211             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_LST +
 1212                       i * GDT_SG_SZ + GDT_SG_PTR, dm_segs->ds_addr);
 1213             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_LST +
 1214                       i * GDT_SG_SZ + GDT_SG_LEN, dm_segs->ds_len);
 1215             dm_segs++;
 1216         }
 1217         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SG_RANZ,        
 1218                   nseg);
 1219         gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_RAW_SDATA, 
 1220                   0xffffffffUL);
 1221 
 1222         gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_RAW_SG_LST +
 1223                                   nseg * GDT_SG_SZ, sizeof(u_int32_t));
 1224     }
 1225 
 1226     if (nseg != 0) {
 1227         bus_dmamap_sync(gdt->sc_buffer_dmat, gccb->gc_dmamap, 
 1228             (ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN ?
 1229             BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
 1230     }
 1231     
 1232     /* We must NOT abort the command here if CAM_REQ_INPROG is not set,
 1233      * because command semaphore is already set!
 1234      */
 1235     
 1236     ccb->ccb_h.status |= CAM_SIM_QUEUED;
 1237     /* timeout handling */
 1238     callout_reset_sbt(&gccb->gc_timeout, SBT_1MS * ccb->ccb_h.timeout, 0,
 1239       iir_timeout, (caddr_t)gccb, 0);
 1240 
 1241     gdt->sc_copy_cmd(gdt, gccb);
 1242 }
 1243 
 1244 
 1245 static void     
 1246 iir_action( struct cam_sim *sim, union ccb *ccb )
 1247 {
 1248     struct gdt_softc *gdt;
 1249     int bus, target, lun;
 1250 
 1251     gdt = (struct gdt_softc *)cam_sim_softc( sim );
 1252     mtx_assert(&gdt->sc_lock, MA_OWNED);
 1253     ccb->ccb_h.ccb_sim_ptr = sim;
 1254     bus = cam_sim_bus(sim);
 1255     target = ccb->ccb_h.target_id;
 1256     lun = ccb->ccb_h.target_lun;
 1257     GDT_DPRINTF(GDT_D_CMD, 
 1258                 ("iir_action(%p) func 0x%x cmd 0x%x bus %d target %d lun %d\n", 
 1259                  gdt, ccb->ccb_h.func_code, ccb->csio.cdb_io.cdb_bytes[0], 
 1260                  bus, target, lun)); 
 1261     ++gdt_stat.io_count_act;
 1262     if (gdt_stat.io_count_act > gdt_stat.io_count_max)
 1263         gdt_stat.io_count_max = gdt_stat.io_count_act;
 1264 
 1265     switch (ccb->ccb_h.func_code) {
 1266       case XPT_SCSI_IO:
 1267         TAILQ_INSERT_TAIL(&gdt->sc_ccb_queue, &ccb->ccb_h, sim_links.tqe);
 1268         ++gdt_stat.req_queue_act;
 1269         if (gdt_stat.req_queue_act > gdt_stat.req_queue_max)
 1270             gdt_stat.req_queue_max = gdt_stat.req_queue_act;
 1271         gdt_next(gdt);
 1272         break;
 1273       case XPT_RESET_DEV:   /* Bus Device Reset the specified SCSI device */
 1274       case XPT_ABORT:                       /* Abort the specified CCB */
 1275         /* XXX Implement */
 1276         ccb->ccb_h.status = CAM_REQ_INVALID;
 1277         --gdt_stat.io_count_act;
 1278         xpt_done(ccb);
 1279         break;
 1280       case XPT_SET_TRAN_SETTINGS:
 1281         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 1282         --gdt_stat.io_count_act;
 1283         xpt_done(ccb);  
 1284         break;
 1285       case XPT_GET_TRAN_SETTINGS:
 1286         /* Get default/user set transfer settings for the target */
 1287           {
 1288               struct        ccb_trans_settings *cts = &ccb->cts;
 1289               struct ccb_trans_settings_scsi *scsi = &cts->proto_specific.scsi;
 1290               struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
 1291 
 1292               cts->protocol = PROTO_SCSI;
 1293               cts->protocol_version = SCSI_REV_2;
 1294               cts->transport = XPORT_SPI;
 1295               cts->transport_version = 2;
 1296 
 1297               if (cts->type == CTS_TYPE_USER_SETTINGS) {
 1298                   spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 1299                   scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 1300                   spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 1301                   spi->sync_period = 25; /* 10MHz */
 1302                   if (spi->sync_period != 0)
 1303                       spi->sync_offset = 15;
 1304                   
 1305                   spi->valid = CTS_SPI_VALID_SYNC_RATE
 1306                       | CTS_SPI_VALID_SYNC_OFFSET
 1307                       | CTS_SPI_VALID_BUS_WIDTH
 1308                       | CTS_SPI_VALID_DISC;
 1309                   scsi->valid = CTS_SCSI_VALID_TQ;
 1310                   ccb->ccb_h.status = CAM_REQ_CMP;
 1311               } else {
 1312                   ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 1313               }
 1314               --gdt_stat.io_count_act;
 1315               xpt_done(ccb);
 1316               break;
 1317           }
 1318       case XPT_CALC_GEOMETRY:
 1319           {
 1320               struct ccb_calc_geometry *ccg;
 1321               u_int32_t secs_per_cylinder;
 1322 
 1323               ccg = &ccb->ccg;
 1324               ccg->heads = gdt->sc_hdr[target].hd_heads;
 1325               ccg->secs_per_track = gdt->sc_hdr[target].hd_secs;
 1326               secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 1327               ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 1328               ccb->ccb_h.status = CAM_REQ_CMP;
 1329               --gdt_stat.io_count_act;
 1330               xpt_done(ccb);
 1331               break;
 1332           }
 1333       case XPT_RESET_BUS:           /* Reset the specified SCSI bus */
 1334           {
 1335               /* XXX Implement */
 1336               ccb->ccb_h.status = CAM_REQ_CMP;
 1337               --gdt_stat.io_count_act;
 1338               xpt_done(ccb);
 1339               break;
 1340           }
 1341       case XPT_TERM_IO:             /* Terminate the I/O process */
 1342         /* XXX Implement */
 1343         ccb->ccb_h.status = CAM_REQ_INVALID;
 1344         --gdt_stat.io_count_act;
 1345         xpt_done(ccb);
 1346         break;
 1347       case XPT_PATH_INQ:            /* Path routing inquiry */
 1348           {
 1349               struct ccb_pathinq *cpi = &ccb->cpi;
 1350               
 1351               cpi->version_num = 1;
 1352               cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
 1353               cpi->hba_inquiry |= PI_WIDE_16;
 1354               cpi->target_sprt = 1;
 1355               cpi->hba_misc = 0;
 1356               cpi->hba_eng_cnt = 0;
 1357               if (bus == gdt->sc_virt_bus)
 1358                   cpi->max_target = GDT_MAX_HDRIVES - 1;
 1359               else if (gdt->sc_class & GDT_FC)
 1360                   cpi->max_target = GDT_MAXID_FC - 1;
 1361               else
 1362                   cpi->max_target = GDT_MAXID - 1;
 1363               cpi->max_lun = 7;
 1364               cpi->unit_number = cam_sim_unit(sim);
 1365               cpi->bus_id = bus;
 1366               cpi->initiator_id = 
 1367                   (bus == gdt->sc_virt_bus ? 127 : gdt->sc_bus_id[bus]);
 1368               cpi->base_transfer_speed = 3300;
 1369               strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 1370               if (gdt->sc_vendor == INTEL_VENDOR_ID_IIR)
 1371                   strncpy(cpi->hba_vid, "Intel Corp.", HBA_IDLEN);
 1372               else
 1373                   strncpy(cpi->hba_vid, "ICP vortex ", HBA_IDLEN);
 1374               strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 1375               cpi->transport = XPORT_SPI;
 1376               cpi->transport_version = 2;
 1377               cpi->protocol = PROTO_SCSI;
 1378               cpi->protocol_version = SCSI_REV_2;
 1379               cpi->ccb_h.status = CAM_REQ_CMP;
 1380               --gdt_stat.io_count_act;
 1381               xpt_done(ccb);
 1382               break;
 1383           }
 1384       default:
 1385         GDT_DPRINTF(GDT_D_INVALID, ("gdt_next(%p) cmd 0x%x invalid\n", 
 1386                                     gdt, ccb->ccb_h.func_code));
 1387         ccb->ccb_h.status = CAM_REQ_INVALID;
 1388         --gdt_stat.io_count_act;
 1389         xpt_done(ccb);
 1390         break;
 1391     }
 1392 }
 1393 
 1394 static void     
 1395 iir_poll( struct cam_sim *sim )
 1396 {
 1397     struct gdt_softc *gdt;
 1398 
 1399     gdt = (struct gdt_softc *)cam_sim_softc( sim );
 1400     GDT_DPRINTF(GDT_D_CMD, ("iir_poll sim %p gdt %p\n", sim, gdt));
 1401     iir_intr_locked(gdt);
 1402 }
 1403 
 1404 static void     
 1405 iir_timeout(void *arg)
 1406 {
 1407     GDT_DPRINTF(GDT_D_TIMEOUT, ("iir_timeout(%p)\n", gccb));
 1408 }
 1409 
 1410 static void     
 1411 iir_shutdown( void *arg, int howto )
 1412 {
 1413     struct gdt_softc *gdt;
 1414     struct gdt_ccb *gccb;
 1415     gdt_ucmd_t *ucmd;
 1416     int i;
 1417 
 1418     gdt = (struct gdt_softc *)arg;
 1419     GDT_DPRINTF(GDT_D_CMD, ("iir_shutdown(%p, %d)\n", gdt, howto));
 1420 
 1421     device_printf(gdt->sc_devnode,
 1422         "Flushing all Host Drives. Please wait ...  ");
 1423 
 1424     /* allocate ucmd buffer */
 1425     ucmd = malloc(sizeof(gdt_ucmd_t), M_GDTBUF, M_NOWAIT);
 1426     if (ucmd == NULL) {
 1427         printf("\n");
 1428         device_printf(gdt->sc_devnode,
 1429             "iir_shutdown(): Cannot allocate resource\n");
 1430         return;
 1431     }
 1432     bzero(ucmd, sizeof(gdt_ucmd_t));
 1433 
 1434     /* wait for pending IOs */
 1435     mtx_lock(&gdt->sc_lock);
 1436     gdt->sc_state = GDT_SHUTDOWN;
 1437     if ((gccb = SLIST_FIRST(&gdt->sc_pending_gccb)) != NULL)
 1438         mtx_sleep(gccb, &gdt->sc_lock, PCATCH | PRIBIO, "iirshw", 100 * hz);
 1439 
 1440     /* flush */
 1441     for (i = 0; i < GDT_MAX_HDRIVES; ++i) {
 1442         if (gdt->sc_hdr[i].hd_present) {
 1443             ucmd->service = GDT_CACHESERVICE;
 1444             ucmd->OpCode = GDT_FLUSH;
 1445             ucmd->u.cache.DeviceNo = i;
 1446             TAILQ_INSERT_TAIL(&gdt->sc_ucmd_queue, ucmd, links);
 1447             ucmd->complete_flag = FALSE;
 1448             gdt_next(gdt);
 1449             if (!ucmd->complete_flag)
 1450                 mtx_sleep(ucmd, &gdt->sc_lock, PCATCH | PRIBIO, "iirshw",
 1451                     10 * hz);
 1452         }
 1453     }
 1454     mtx_unlock(&gdt->sc_lock);
 1455 
 1456     free(ucmd, M_DEVBUF);
 1457     printf("Done.\n");
 1458 }
 1459 
 1460 void
 1461 iir_intr(void *arg)
 1462 {
 1463     struct gdt_softc *gdt = arg;
 1464 
 1465     mtx_lock(&gdt->sc_lock);
 1466     iir_intr_locked(gdt);
 1467     mtx_unlock(&gdt->sc_lock);
 1468 }
 1469 
 1470 int
 1471 iir_intr_locked(struct gdt_softc *gdt)
 1472 {
 1473     struct gdt_intr_ctx ctx;
 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     mtx_assert(&gdt->sc_lock, MA_OWNED);
 1481 
 1482     /* If polling and we were not called from gdt_wait, just return */
 1483     if ((gdt->sc_state & GDT_POLLING) &&
 1484         !(gdt->sc_state & GDT_POLL_WAIT))
 1485         return (0);
 1486 
 1487     ctx.istatus = gdt->sc_get_status(gdt);
 1488     if (ctx.istatus == 0x00) {
 1489         gdt->sc_status = GDT_S_NO_STATUS;
 1490         return (ctx.istatus);
 1491     }
 1492 
 1493     gdt->sc_intr(gdt, &ctx);
 1494 
 1495     gdt->sc_status = ctx.cmd_status;
 1496     gdt->sc_service = ctx.service;
 1497     gdt->sc_info = ctx.info;
 1498     gdt->sc_info2 = ctx.info2;
 1499 
 1500     if (ctx.istatus == GDT_ASYNCINDEX) {
 1501         gdt_async_event(gdt, ctx.service);
 1502         return (ctx.istatus);
 1503     }
 1504     if (ctx.istatus == GDT_SPEZINDEX) {
 1505         GDT_DPRINTF(GDT_D_INVALID, 
 1506                     ("%s: Service unknown or not initialized!\n", 
 1507                      device_get_nameunit(gdt->sc_devnode)));   
 1508         gdt->sc_dvr.size = sizeof(gdt->sc_dvr.eu.driver);
 1509         gdt->sc_dvr.eu.driver.ionode = gdt->sc_hanum;
 1510         gdt_store_event(GDT_ES_DRIVER, 4, &gdt->sc_dvr);
 1511         return (ctx.istatus);
 1512     }
 1513 
 1514     gccb = &gdt->sc_gccbs[ctx.istatus - 2];
 1515     ctx.service = gccb->gc_service;
 1516 
 1517     switch (gccb->gc_flags) {
 1518       case GDT_GCF_UNUSED:
 1519         GDT_DPRINTF(GDT_D_INVALID, ("%s: Index (%d) to unused command!\n",
 1520                     device_get_nameunit(gdt->sc_devnode), ctx.istatus));
 1521         gdt->sc_dvr.size = sizeof(gdt->sc_dvr.eu.driver);
 1522         gdt->sc_dvr.eu.driver.ionode = gdt->sc_hanum;
 1523         gdt->sc_dvr.eu.driver.index = ctx.istatus;
 1524         gdt_store_event(GDT_ES_DRIVER, 1, &gdt->sc_dvr);
 1525         gdt_free_ccb(gdt, gccb);
 1526         break;
 1527 
 1528       case GDT_GCF_INTERNAL:
 1529         break;
 1530 
 1531       case GDT_GCF_IOCTL:
 1532         ucmd = gccb->gc_ucmd; 
 1533         if (gdt->sc_status == GDT_S_BSY) {
 1534             GDT_DPRINTF(GDT_D_DEBUG, ("iir_intr(%p) ioctl: gccb %p busy\n", 
 1535                                       gdt, gccb));
 1536             TAILQ_INSERT_HEAD(&gdt->sc_ucmd_queue, ucmd, links);
 1537         } else {
 1538             ucmd->status = gdt->sc_status;
 1539             ucmd->info = gdt->sc_info;
 1540             ucmd->complete_flag = TRUE;
 1541             if (ucmd->service == GDT_CACHESERVICE) {
 1542                 if (ucmd->OpCode == GDT_IOCTL) {
 1543                     cnt = ucmd->u.ioctl.param_size;
 1544                     if (cnt != 0)
 1545                         bcopy(gccb->gc_scratch, ucmd->data, cnt);
 1546                 } else {
 1547                     cnt = ucmd->u.cache.BlockCnt * GDT_SECTOR_SIZE;
 1548                     if (cnt != 0)
 1549                         bcopy(gccb->gc_scratch, ucmd->data, cnt);
 1550                 }
 1551             } else {
 1552                 cnt = ucmd->u.raw.sdlen;
 1553                 if (cnt != 0)
 1554                     bcopy(gccb->gc_scratch, ucmd->data, cnt);
 1555                 if (ucmd->u.raw.sense_len != 0) 
 1556                     bcopy(gccb->gc_scratch, ucmd->data, cnt);
 1557             }
 1558             gdt_free_ccb(gdt, gccb);
 1559             /* wakeup */
 1560             wakeup(ucmd);
 1561         }
 1562         gdt_next(gdt); 
 1563         break;
 1564 
 1565       default:
 1566         gdt_free_ccb(gdt, gccb);
 1567         gdt_sync_event(gdt, ctx.service, ctx.istatus, gccb);
 1568         gdt_next(gdt); 
 1569         break;
 1570     }
 1571 
 1572     return (ctx.istatus);
 1573 }
 1574 
 1575 int
 1576 gdt_async_event(struct gdt_softc *gdt, int service)
 1577 {
 1578     struct gdt_ccb *gccb;
 1579 
 1580     GDT_DPRINTF(GDT_D_INTR, ("gdt_async_event(%p, %d)\n", gdt, service));
 1581 
 1582     if (service == GDT_SCREENSERVICE) {
 1583         if (gdt->sc_status == GDT_MSG_REQUEST) {
 1584             while (gdt->sc_test_busy(gdt))
 1585                 DELAY(1);
 1586             gccb = gdt_get_ccb(gdt);
 1587             if (gccb == NULL) {
 1588                 device_printf(gdt->sc_devnode, "No free command index found\n");
 1589                 return (1);
 1590             }
 1591             bzero(gccb->gc_cmd, GDT_CMD_SZ);
 1592             gccb->gc_service = service;
 1593             gccb->gc_flags = GDT_GCF_SCREEN;
 1594             gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
 1595                       gccb->gc_cmd_index);
 1596             gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, GDT_READ);
 1597             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_HANDLE,
 1598                       GDT_MSG_INV_HANDLE);
 1599             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_ADDR,
 1600                       gccb->gc_scratch_busbase);
 1601             gdt->sc_set_sema0(gdt);
 1602             gdt->sc_cmd_off = 0;
 1603             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_SCREEN_SZ, 
 1604                                       sizeof(u_int32_t));
 1605             gdt->sc_cmd_cnt = 0;
 1606             gdt->sc_copy_cmd(gdt, gccb);
 1607             device_printf(gdt->sc_devnode, "[PCI %d/%d] ", gdt->sc_bus,
 1608                 gdt->sc_slot);
 1609             gdt->sc_release_event(gdt);
 1610         }
 1611 
 1612     } else {
 1613         if ((gdt->sc_fw_vers & 0xff) >= 0x1a) {
 1614             gdt->sc_dvr.size = 0;
 1615             gdt->sc_dvr.eu.async.ionode = gdt->sc_hanum;
 1616             gdt->sc_dvr.eu.async.status  = gdt->sc_status;
 1617             /* severity and event_string already set! */
 1618         } else {        
 1619             gdt->sc_dvr.size = sizeof(gdt->sc_dvr.eu.async);
 1620             gdt->sc_dvr.eu.async.ionode   = gdt->sc_hanum;
 1621             gdt->sc_dvr.eu.async.service = service;
 1622             gdt->sc_dvr.eu.async.status  = gdt->sc_status;
 1623             gdt->sc_dvr.eu.async.info    = gdt->sc_info;
 1624             *(u_int32_t *)gdt->sc_dvr.eu.async.scsi_coord  = gdt->sc_info2;
 1625         }
 1626         gdt_store_event(GDT_ES_ASYNC, service, &gdt->sc_dvr);
 1627         device_printf(gdt->sc_devnode, "%s\n", gdt->sc_dvr.event_string);
 1628     }
 1629     
 1630     return (0);
 1631 }
 1632 
 1633 int
 1634 gdt_sync_event(struct gdt_softc *gdt, int service, 
 1635                u_int8_t index, struct gdt_ccb *gccb)
 1636 {
 1637     union ccb *ccb;
 1638 
 1639     GDT_DPRINTF(GDT_D_INTR,
 1640                 ("gdt_sync_event(%p, %d, %d, %p)\n", gdt,service,index,gccb));
 1641 
 1642     ccb = gccb->gc_ccb;
 1643 
 1644     if (service == GDT_SCREENSERVICE) {
 1645         u_int32_t msg_len;
 1646 
 1647         msg_len = gdt_dec32(gccb->gc_scratch + GDT_SCR_MSG_LEN);
 1648         if (msg_len)
 1649             if (!(gccb->gc_scratch[GDT_SCR_MSG_ANSWER] && 
 1650                   gccb->gc_scratch[GDT_SCR_MSG_EXT])) {
 1651                 gccb->gc_scratch[GDT_SCR_MSG_TEXT + msg_len] = '\0';
 1652                 printf("%s",&gccb->gc_scratch[GDT_SCR_MSG_TEXT]);
 1653             }
 1654 
 1655         if (gccb->gc_scratch[GDT_SCR_MSG_EXT] && 
 1656             !gccb->gc_scratch[GDT_SCR_MSG_ANSWER]) {
 1657             while (gdt->sc_test_busy(gdt))
 1658                 DELAY(1);
 1659             bzero(gccb->gc_cmd, GDT_CMD_SZ);
 1660             gccb = gdt_get_ccb(gdt);
 1661             if (gccb == NULL) {
 1662                 device_printf(gdt->sc_devnode, "No free command index found\n");
 1663                 return (1);
 1664             }
 1665             gccb->gc_service = service;
 1666             gccb->gc_flags = GDT_GCF_SCREEN;
 1667             gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
 1668                       gccb->gc_cmd_index);
 1669             gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, GDT_READ);
 1670             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_HANDLE,
 1671                       gccb->gc_scratch[GDT_SCR_MSG_HANDLE]);
 1672             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_ADDR,
 1673                       gccb->gc_scratch_busbase);
 1674             gdt->sc_set_sema0(gdt);
 1675             gdt->sc_cmd_off = 0;
 1676             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_SCREEN_SZ, 
 1677                                       sizeof(u_int32_t));
 1678             gdt->sc_cmd_cnt = 0;
 1679             gdt->sc_copy_cmd(gdt, gccb);
 1680             gdt->sc_release_event(gdt);
 1681             return (0);
 1682         }
 1683 
 1684         if (gccb->gc_scratch[GDT_SCR_MSG_ANSWER] && 
 1685             gdt_dec32(gccb->gc_scratch + GDT_SCR_MSG_ALEN)) {
 1686             /* default answers (getchar() not possible) */
 1687             if (gdt_dec32(gccb->gc_scratch + GDT_SCR_MSG_ALEN) == 1) {
 1688                 gdt_enc32(gccb->gc_scratch + GDT_SCR_MSG_ALEN, 0);
 1689                 gdt_enc32(gccb->gc_scratch + GDT_SCR_MSG_LEN, 1);
 1690                 gccb->gc_scratch[GDT_SCR_MSG_TEXT] = 0;
 1691             } else {
 1692                 gdt_enc32(gccb->gc_scratch + GDT_SCR_MSG_ALEN, 
 1693                           gdt_dec32(gccb->gc_scratch + GDT_SCR_MSG_ALEN) - 2);
 1694                 gdt_enc32(gccb->gc_scratch + GDT_SCR_MSG_LEN, 2);
 1695                 gccb->gc_scratch[GDT_SCR_MSG_TEXT] = 1;
 1696                 gccb->gc_scratch[GDT_SCR_MSG_TEXT + 1] = 0;
 1697             }
 1698             gccb->gc_scratch[GDT_SCR_MSG_EXT] = 0;
 1699             gccb->gc_scratch[GDT_SCR_MSG_ANSWER] = 0;
 1700             while (gdt->sc_test_busy(gdt))
 1701                 DELAY(1);
 1702             bzero(gccb->gc_cmd, GDT_CMD_SZ);
 1703             gccb = gdt_get_ccb(gdt);
 1704             if (gccb == NULL) {
 1705                 device_printf(gdt->sc_devnode, "No free command index found\n");
 1706                 return (1);
 1707             }
 1708             gccb->gc_service = service;
 1709             gccb->gc_flags = GDT_GCF_SCREEN;
 1710             gdt_enc32(gccb->gc_cmd + GDT_CMD_COMMANDINDEX,
 1711                       gccb->gc_cmd_index);
 1712             gdt_enc16(gccb->gc_cmd + GDT_CMD_OPCODE, GDT_WRITE);
 1713             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_HANDLE,
 1714                       gccb->gc_scratch[GDT_SCR_MSG_HANDLE]);
 1715             gdt_enc32(gccb->gc_cmd + GDT_CMD_UNION + GDT_SCREEN_MSG_ADDR,
 1716                       gccb->gc_scratch_busbase);
 1717             gdt->sc_set_sema0(gdt);
 1718             gdt->sc_cmd_off = 0;
 1719             gccb->gc_cmd_len = roundup(GDT_CMD_UNION + GDT_SCREEN_SZ, 
 1720                                       sizeof(u_int32_t));
 1721             gdt->sc_cmd_cnt = 0;
 1722             gdt->sc_copy_cmd(gdt, gccb);
 1723             gdt->sc_release_event(gdt);
 1724             return (0);
 1725         }
 1726         printf("\n");
 1727         return (0);
 1728     } else {
 1729         callout_stop(&gccb->gc_timeout);
 1730         if (gdt->sc_status == GDT_S_BSY) {
 1731             GDT_DPRINTF(GDT_D_DEBUG, ("gdt_sync_event(%p) gccb %p busy\n", 
 1732                                       gdt, gccb));
 1733             TAILQ_INSERT_HEAD(&gdt->sc_ccb_queue, &ccb->ccb_h, sim_links.tqe);
 1734             ++gdt_stat.req_queue_act;
 1735             if (gdt_stat.req_queue_act > gdt_stat.req_queue_max)
 1736                 gdt_stat.req_queue_max = gdt_stat.req_queue_act;
 1737             return (2);
 1738         }
 1739 
 1740         bus_dmamap_sync(gdt->sc_buffer_dmat, gccb->gc_dmamap, 
 1741             (ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN ?
 1742             BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
 1743         bus_dmamap_unload(gdt->sc_buffer_dmat, gccb->gc_dmamap);
 1744 
 1745         ccb->csio.resid = 0;
 1746         if (gdt->sc_status == GDT_S_OK) {
 1747             ccb->ccb_h.status |= CAM_REQ_CMP;
 1748             ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 1749         } else {
 1750             /* error */
 1751             if (gccb->gc_service == GDT_CACHESERVICE) {
 1752                 struct scsi_sense_data *sense;
 1753 
 1754                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
 1755                 ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 1756                 ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND;
 1757                 bzero(&ccb->csio.sense_data, ccb->csio.sense_len);
 1758                 sense = &ccb->csio.sense_data;
 1759                 scsi_set_sense_data(sense,
 1760                                     /*sense_format*/ SSD_TYPE_NONE,
 1761                                     /*current_error*/ 1,
 1762                                     /*sense_key*/ SSD_KEY_NOT_READY,
 1763                                     /*asc*/ 0x4,
 1764                                     /*ascq*/ 0x01,
 1765                                     SSD_ELEM_NONE);
 1766 
 1767                 gdt->sc_dvr.size = sizeof(gdt->sc_dvr.eu.sync);
 1768                 gdt->sc_dvr.eu.sync.ionode  = gdt->sc_hanum;
 1769                 gdt->sc_dvr.eu.sync.service = service;
 1770                 gdt->sc_dvr.eu.sync.status  = gdt->sc_status;
 1771                 gdt->sc_dvr.eu.sync.info    = gdt->sc_info;
 1772                 gdt->sc_dvr.eu.sync.hostdrive = ccb->ccb_h.target_id;
 1773                 if (gdt->sc_status >= 0x8000)
 1774                     gdt_store_event(GDT_ES_SYNC, 0, &gdt->sc_dvr);
 1775                 else
 1776                     gdt_store_event(GDT_ES_SYNC, service, &gdt->sc_dvr);
 1777             } else {
 1778                 /* raw service */
 1779                 if (gdt->sc_status != GDT_S_RAW_SCSI || gdt->sc_info >= 0x100) {
 1780                     ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 1781                 } else {
 1782                     ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR|CAM_AUTOSNS_VALID;
 1783                     ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 1784                     ccb->csio.scsi_status = gdt->sc_info;
 1785                     bcopy(gccb->gc_scratch, &ccb->csio.sense_data,
 1786                           ccb->csio.sense_len);
 1787                 }
 1788             }
 1789         }
 1790         --gdt_stat.io_count_act;
 1791         xpt_done(ccb);
 1792     }
 1793     return (0);
 1794 }
 1795 
 1796 /* Controller event handling functions */
 1797 void gdt_store_event(u_int16_t source, u_int16_t idx,
 1798                              gdt_evt_data *evt)
 1799 {
 1800     gdt_evt_str *e;
 1801     struct timeval tv;
 1802 
 1803     GDT_DPRINTF(GDT_D_MISC, ("gdt_store_event(%d, %d)\n", source, idx));
 1804     if (source == 0)                        /* no source -> no event */
 1805         return;
 1806 
 1807     mtx_lock(&elock);
 1808     if (ebuffer[elastidx].event_source == source &&
 1809         ebuffer[elastidx].event_idx == idx &&
 1810         ((evt->size != 0 && ebuffer[elastidx].event_data.size != 0 &&
 1811           !memcmp((char *)&ebuffer[elastidx].event_data.eu,
 1812                   (char *)&evt->eu, evt->size)) ||
 1813          (evt->size == 0 && ebuffer[elastidx].event_data.size == 0 &&
 1814           !strcmp((char *)&ebuffer[elastidx].event_data.event_string,
 1815                   (char *)&evt->event_string)))) { 
 1816         e = &ebuffer[elastidx];
 1817         getmicrotime(&tv);
 1818         e->last_stamp = tv.tv_sec;
 1819         ++e->same_count;
 1820     } else {
 1821         if (ebuffer[elastidx].event_source != 0) {  /* entry not free ? */
 1822             ++elastidx;
 1823             if (elastidx == GDT_MAX_EVENTS)
 1824                 elastidx = 0;
 1825             if (elastidx == eoldidx) {              /* reached mark ? */
 1826                 ++eoldidx;
 1827                 if (eoldidx == GDT_MAX_EVENTS)
 1828                     eoldidx = 0;
 1829             }
 1830         }
 1831         e = &ebuffer[elastidx];
 1832         e->event_source = source;
 1833         e->event_idx = idx;
 1834         getmicrotime(&tv);
 1835         e->first_stamp = e->last_stamp = tv.tv_sec;
 1836         e->same_count = 1;
 1837         e->event_data = *evt;
 1838         e->application = 0;
 1839     }
 1840     mtx_unlock(&elock);
 1841 }
 1842 
 1843 int gdt_read_event(int handle, gdt_evt_str *estr)
 1844 {
 1845     gdt_evt_str *e;
 1846     int eindex;
 1847     
 1848     GDT_DPRINTF(GDT_D_MISC, ("gdt_read_event(%d)\n", handle));
 1849     mtx_lock(&elock);
 1850     if (handle == -1)
 1851         eindex = eoldidx;
 1852     else
 1853         eindex = handle;
 1854     estr->event_source = 0;
 1855 
 1856     if (eindex >= GDT_MAX_EVENTS) {
 1857         mtx_unlock(&elock);
 1858         return eindex;
 1859     }
 1860     e = &ebuffer[eindex];
 1861     if (e->event_source != 0) {
 1862         if (eindex != elastidx) {
 1863             if (++eindex == GDT_MAX_EVENTS)
 1864                 eindex = 0;
 1865         } else {
 1866             eindex = -1;
 1867         }
 1868         memcpy(estr, e, sizeof(gdt_evt_str));
 1869     }
 1870     mtx_unlock(&elock);
 1871     return eindex;
 1872 }
 1873 
 1874 void gdt_readapp_event(u_int8_t application, gdt_evt_str *estr)
 1875 {
 1876     gdt_evt_str *e;
 1877     int found = FALSE;
 1878     int eindex;
 1879     
 1880     GDT_DPRINTF(GDT_D_MISC, ("gdt_readapp_event(%d)\n", application));
 1881     mtx_lock(&elock);
 1882     eindex = eoldidx;
 1883     for (;;) {
 1884         e = &ebuffer[eindex];
 1885         if (e->event_source == 0)
 1886             break;
 1887         if ((e->application & application) == 0) {
 1888             e->application |= application;
 1889             found = TRUE;
 1890             break;
 1891         }
 1892         if (eindex == elastidx)
 1893             break;
 1894         if (++eindex == GDT_MAX_EVENTS)
 1895             eindex = 0;
 1896     }
 1897     if (found)
 1898         memcpy(estr, e, sizeof(gdt_evt_str));
 1899     else
 1900         estr->event_source = 0;
 1901     mtx_unlock(&elock);
 1902 }
 1903 
 1904 void gdt_clear_events()
 1905 {
 1906     GDT_DPRINTF(GDT_D_MISC, ("gdt_clear_events\n"));
 1907 
 1908     mtx_lock(&elock);
 1909     eoldidx = elastidx = 0;
 1910     ebuffer[0].event_source = 0;
 1911     mtx_unlock(&elock);
 1912 }

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