The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/dpt/dpt_scsi.c

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    1 /*-
    2  *       Copyright (c) 1997 by Simon Shapiro
    3  *       All Rights Reserved
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions, and the following disclaimer,
   10  *    without modification, immediately at the beginning of the file.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #ident "$FreeBSD: releng/8.1/sys/dev/dpt/dpt_scsi.c 170872 2007-06-17 05:55:54Z scottl $"
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: releng/8.1/sys/dev/dpt/dpt_scsi.c 170872 2007-06-17 05:55:54Z scottl $");
   33 
   34 /*
   35  * dpt_scsi.c: SCSI dependant code for the DPT driver
   36  *
   37  * credits:     Assisted by Mike Neuffer in the early low level DPT code
   38  *              Thanx to Mark Salyzyn of DPT for his assistance.
   39  *              Special thanx to Justin Gibbs for invaluable help in
   40  *              making this driver look and work like a FreeBSD component.
   41  *              Last but not least, many thanx to UCB and the FreeBSD
   42  *              team for creating and maintaining such a wonderful O/S.
   43  *
   44  * TODO:     * Add ISA probe code.
   45  *           * Add driver-level RAID-0. This will allow interoperability with
   46  *             NiceTry, M$-Doze, Win-Dog, Slowlaris, etc., in recognizing RAID
   47  *             arrays that span controllers (Wow!).
   48  */
   49 
   50 #define _DPT_C_
   51 
   52 #include "opt_dpt.h"
   53 #include "opt_eisa.h"
   54 
   55 #include <sys/param.h>
   56 #include <sys/systm.h>
   57 #include <sys/eventhandler.h>
   58 #include <sys/malloc.h>
   59 #include <sys/kernel.h>
   60 
   61 #include <sys/bus.h>
   62 
   63 #include <machine/bus.h>
   64 
   65 #include <machine/resource.h>
   66 #include <sys/rman.h>
   67 
   68 
   69 #include <cam/cam.h>
   70 #include <cam/cam_ccb.h>
   71 #include <cam/cam_sim.h>
   72 #include <cam/cam_xpt_sim.h>
   73 #include <cam/cam_debug.h>
   74 #include <cam/scsi/scsi_all.h>
   75 #include <cam/scsi/scsi_message.h>
   76 
   77 #include <vm/vm.h>
   78 #include <vm/pmap.h>
   79 
   80 #include <dev/dpt/dpt.h>
   81 
   82 /* dpt_isa.c, dpt_eisa.c, and dpt_pci.c need this in a central place */
   83 int             dpt_controllers_present;
   84 devclass_t      dpt_devclass;
   85 
   86 #define microtime_now dpt_time_now()
   87 
   88 #define dpt_inl(dpt, port)                              \
   89         bus_space_read_4((dpt)->tag, (dpt)->bsh, port)
   90 #define dpt_inb(dpt, port)                              \
   91         bus_space_read_1((dpt)->tag, (dpt)->bsh, port)
   92 #define dpt_outl(dpt, port, value)                      \
   93         bus_space_write_4((dpt)->tag, (dpt)->bsh, port, value)
   94 #define dpt_outb(dpt, port, value)                      \
   95         bus_space_write_1((dpt)->tag, (dpt)->bsh, port, value)
   96 
   97 /*
   98  * These will have to be setup by parameters passed at boot/load time. For
   99  * perfromance reasons, we make them constants for the time being.
  100  */
  101 #define dpt_min_segs    DPT_MAX_SEGS
  102 #define dpt_max_segs    DPT_MAX_SEGS
  103 
  104 /* Definitions for our use of the SIM private CCB area */
  105 #define ccb_dccb_ptr spriv_ptr0
  106 #define ccb_dpt_ptr spriv_ptr1
  107 
  108 /* ================= Private Inline Function declarations ===================*/
  109 static __inline int             dpt_just_reset(dpt_softc_t * dpt);
  110 static __inline int             dpt_raid_busy(dpt_softc_t * dpt);
  111 #ifdef DEV_EISA
  112 static __inline int             dpt_pio_wait (u_int32_t, u_int, u_int, u_int);
  113 #endif
  114 static __inline int             dpt_wait(dpt_softc_t *dpt, u_int bits,
  115                                          u_int state);
  116 static __inline struct dpt_ccb* dptgetccb(struct dpt_softc *dpt);
  117 static __inline void            dptfreeccb(struct dpt_softc *dpt,
  118                                            struct dpt_ccb *dccb);
  119 static __inline bus_addr_t      dptccbvtop(struct dpt_softc *dpt,
  120                                            struct dpt_ccb *dccb);
  121 
  122 static __inline int             dpt_send_immediate(dpt_softc_t *dpt,
  123                                                    eata_ccb_t *cmd_block,
  124                                                    u_int32_t cmd_busaddr,  
  125                                                    u_int retries,
  126                                                    u_int ifc, u_int code,
  127                                                    u_int code2);
  128 
  129 /* ==================== Private Function declarations =======================*/
  130 static void             dptmapmem(void *arg, bus_dma_segment_t *segs,
  131                                   int nseg, int error);
  132 
  133 static struct sg_map_node*
  134                         dptallocsgmap(struct dpt_softc *dpt);
  135 
  136 static int              dptallocccbs(dpt_softc_t *dpt);
  137 
  138 static int              dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb,
  139                                      u_int32_t dccb_busaddr, u_int size,
  140                                      u_int page, u_int target, int extent);
  141 static void             dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb,
  142                                          u_int32_t dccb_busaddr,
  143                                          u_int8_t *buff);
  144 
  145 static void             dpt_poll(struct cam_sim *sim);
  146 
  147 static void             dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs,
  148                                       int nseg, int error);
  149 
  150 static void             dpt_action(struct cam_sim *sim, union ccb *ccb);
  151 
  152 static int              dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd,
  153                                               u_int32_t cmd_busaddr,
  154                                               u_int command, u_int retries,
  155                                               u_int ifc, u_int code,
  156                                               u_int code2);
  157 static void             dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb,
  158                                         union ccb *ccb, u_int hba_stat,
  159                                         u_int scsi_stat, u_int32_t resid);
  160 
  161 static void             dpttimeout(void *arg);
  162 static void             dptshutdown(void *arg, int howto);
  163 
  164 /* ================= Private Inline Function definitions ====================*/
  165 static __inline int
  166 dpt_just_reset(dpt_softc_t * dpt)
  167 {
  168         if ((dpt_inb(dpt, 2) == 'D')
  169          && (dpt_inb(dpt, 3) == 'P')
  170          && (dpt_inb(dpt, 4) == 'T')
  171          && (dpt_inb(dpt, 5) == 'H'))
  172                 return (1);
  173         else
  174                 return (0);
  175 }
  176 
  177 static __inline int
  178 dpt_raid_busy(dpt_softc_t * dpt)
  179 {
  180         if ((dpt_inb(dpt, 0) == 'D')
  181          && (dpt_inb(dpt, 1) == 'P')
  182          && (dpt_inb(dpt, 2) == 'T'))
  183                 return (1);
  184         else
  185                 return (0);
  186 }
  187 
  188 #ifdef DEV_EISA
  189 static __inline int
  190 dpt_pio_wait (u_int32_t base, u_int reg, u_int bits, u_int state)
  191 {
  192         int   i;
  193         u_int c;
  194 
  195         for (i = 0; i < 20000; i++) {   /* wait 20ms for not busy */
  196                 c = inb(base + reg) & bits;
  197                 if (!(c == state))
  198                         return (0);
  199                 else
  200                         DELAY(50);
  201         }
  202         return (-1);
  203 }
  204 #endif
  205 
  206 static __inline int
  207 dpt_wait(dpt_softc_t *dpt, u_int bits, u_int state)
  208 {
  209         int   i;
  210         u_int c;
  211 
  212         for (i = 0; i < 20000; i++) {   /* wait 20ms for not busy */
  213                 c = dpt_inb(dpt, HA_RSTATUS) & bits;
  214                 if (c == state)
  215                         return (0);
  216                 else
  217                         DELAY(50);
  218         }
  219         return (-1);
  220 }
  221 
  222 static __inline struct dpt_ccb*
  223 dptgetccb(struct dpt_softc *dpt)
  224 {
  225         struct  dpt_ccb* dccb;
  226         int     s;
  227 
  228         s = splcam();
  229         if ((dccb = SLIST_FIRST(&dpt->free_dccb_list)) != NULL) {
  230                 SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
  231                 dpt->free_dccbs--;
  232         } else if (dpt->total_dccbs < dpt->max_dccbs) {
  233                 dptallocccbs(dpt);
  234                 dccb = SLIST_FIRST(&dpt->free_dccb_list);
  235                 if (dccb == NULL)
  236                         printf("dpt%d: Can't malloc DCCB\n", dpt->unit);
  237                 else {
  238                         SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
  239                         dpt->free_dccbs--;
  240                 }
  241         }
  242         splx(s);
  243 
  244         return (dccb);
  245 }
  246 
  247 static __inline void
  248 dptfreeccb(struct dpt_softc *dpt, struct dpt_ccb *dccb)
  249 {
  250         int s;
  251 
  252         s = splcam();
  253         if ((dccb->state & DCCB_ACTIVE) != 0)
  254                 LIST_REMOVE(&dccb->ccb->ccb_h, sim_links.le);
  255         if ((dccb->state & DCCB_RELEASE_SIMQ) != 0)
  256                 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  257         else if (dpt->resource_shortage != 0
  258          && (dccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
  259                 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  260                 dpt->resource_shortage = FALSE;
  261         }
  262         dccb->state = DCCB_FREE;
  263         SLIST_INSERT_HEAD(&dpt->free_dccb_list, dccb, links);
  264         ++dpt->free_dccbs;
  265         splx(s);
  266 }
  267 
  268 static __inline bus_addr_t
  269 dptccbvtop(struct dpt_softc *dpt, struct dpt_ccb *dccb)
  270 {
  271         return (dpt->dpt_ccb_busbase
  272               + (u_int32_t)((caddr_t)dccb - (caddr_t)dpt->dpt_dccbs));
  273 }
  274 
  275 static __inline struct dpt_ccb *
  276 dptccbptov(struct dpt_softc *dpt, bus_addr_t busaddr)
  277 {
  278         return (dpt->dpt_dccbs
  279              +  ((struct dpt_ccb *)busaddr
  280                - (struct dpt_ccb *)dpt->dpt_ccb_busbase));
  281 }
  282 
  283 /*
  284  * Send a command for immediate execution by the DPT
  285  * See above function for IMPORTANT notes.
  286  */
  287 static __inline int
  288 dpt_send_immediate(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
  289                    u_int32_t cmd_busaddr, u_int retries,
  290                    u_int ifc, u_int code, u_int code2)
  291 {
  292         return (dpt_send_eata_command(dpt, cmd_block, cmd_busaddr,
  293                                       EATA_CMD_IMMEDIATE, retries, ifc,
  294                                       code, code2));
  295 }
  296 
  297 
  298 /* ===================== Private Function definitions =======================*/
  299 static void
  300 dptmapmem(void *arg, bus_dma_segment_t *segs, int nseg, int error)
  301 {
  302         bus_addr_t *busaddrp;
  303 
  304         busaddrp = (bus_addr_t *)arg;
  305         *busaddrp = segs->ds_addr;
  306 }
  307 
  308 static struct sg_map_node *
  309 dptallocsgmap(struct dpt_softc *dpt)
  310 {
  311         struct sg_map_node *sg_map;
  312 
  313         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
  314 
  315         if (sg_map == NULL)
  316                 return (NULL);
  317 
  318         /* Allocate S/G space for the next batch of CCBS */
  319         if (bus_dmamem_alloc(dpt->sg_dmat, (void **)&sg_map->sg_vaddr,
  320                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
  321                 free(sg_map, M_DEVBUF);
  322                 return (NULL);
  323         }
  324 
  325         (void)bus_dmamap_load(dpt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
  326                               PAGE_SIZE, dptmapmem, &sg_map->sg_physaddr,
  327                               /*flags*/0);
  328 
  329         SLIST_INSERT_HEAD(&dpt->sg_maps, sg_map, links);
  330 
  331         return (sg_map);
  332 }
  333 
  334 /*
  335  * Allocate another chunk of CCB's. Return count of entries added.
  336  * Assumed to be called at splcam().
  337  */
  338 static int
  339 dptallocccbs(dpt_softc_t *dpt)
  340 {
  341         struct dpt_ccb *next_ccb;
  342         struct sg_map_node *sg_map;
  343         bus_addr_t physaddr;
  344         dpt_sg_t *segs;
  345         int newcount;
  346         int i;
  347 
  348         next_ccb = &dpt->dpt_dccbs[dpt->total_dccbs];
  349 
  350         if (next_ccb == dpt->dpt_dccbs) {
  351                 /*
  352                  * First time through.  Re-use the S/G
  353                  * space we allocated for initialization
  354                  * CCBS.
  355                  */
  356                 sg_map = SLIST_FIRST(&dpt->sg_maps);
  357         } else {
  358                 sg_map = dptallocsgmap(dpt);
  359         }
  360 
  361         if (sg_map == NULL)
  362                 return (0);
  363 
  364         segs = sg_map->sg_vaddr;
  365         physaddr = sg_map->sg_physaddr;
  366 
  367         newcount = (PAGE_SIZE / (dpt->sgsize * sizeof(dpt_sg_t)));
  368         for (i = 0; dpt->total_dccbs < dpt->max_dccbs && i < newcount; i++) {
  369                 int error;
  370 
  371                 error = bus_dmamap_create(dpt->buffer_dmat, /*flags*/0,
  372                                           &next_ccb->dmamap);
  373                 if (error != 0)
  374                         break;
  375                 next_ccb->sg_list = segs;
  376                 next_ccb->sg_busaddr = htonl(physaddr);
  377                 next_ccb->eata_ccb.cp_dataDMA = htonl(physaddr);
  378                 next_ccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
  379                 next_ccb->eata_ccb.cp_reqDMA =
  380                     htonl(dptccbvtop(dpt, next_ccb)
  381                         + offsetof(struct dpt_ccb, sense_data));
  382                 next_ccb->eata_ccb.cp_busaddr = dpt->dpt_ccb_busend;
  383                 next_ccb->state = DCCB_FREE;
  384                 next_ccb->tag = dpt->total_dccbs;
  385                 SLIST_INSERT_HEAD(&dpt->free_dccb_list, next_ccb, links);
  386                 segs += dpt->sgsize;
  387                 physaddr += (dpt->sgsize * sizeof(dpt_sg_t));
  388                 dpt->dpt_ccb_busend += sizeof(*next_ccb);
  389                 next_ccb++;
  390                 dpt->total_dccbs++;
  391         }
  392         return (i);
  393 }
  394 
  395 #ifdef DEV_EISA
  396 dpt_conf_t *
  397 dpt_pio_get_conf (u_int32_t base)
  398 {
  399         static dpt_conf_t *     conf;
  400         u_int16_t *             p;
  401         int                     i;
  402 
  403         /*
  404          * Allocate a dpt_conf_t
  405          */
  406         if (!conf) {
  407                 conf = (dpt_conf_t *)malloc(sizeof(dpt_conf_t),
  408                                                  M_DEVBUF, M_NOWAIT);
  409         }
  410         
  411         /*
  412          * If we didn't get one then we probably won't ever get one.
  413          */
  414         if (!conf) {
  415                 printf("dpt: unable to allocate dpt_conf_t\n");
  416                 return (NULL);
  417         }
  418 
  419         /*
  420          * If we have one, clean it up.
  421          */
  422         bzero(conf, sizeof(dpt_conf_t));
  423 
  424         /*
  425          * Reset the controller.
  426          */
  427         outb((base + HA_WCOMMAND), EATA_CMD_RESET);
  428 
  429         /*
  430          * Wait for the controller to become ready.
  431          * For some reason there can be -no- delays after calling reset
  432          * before we wait on ready status.
  433          */
  434         if (dpt_pio_wait(base, HA_RSTATUS, HA_SBUSY, 0)) {
  435                 printf("dpt: timeout waiting for controller to become ready\n");
  436                 return (NULL);
  437         }
  438 
  439         if (dpt_pio_wait(base, HA_RAUXSTAT, HA_ABUSY, 0)) {
  440                 printf("dpt: timetout waiting for adapter ready.\n");
  441                 return (NULL);
  442         }
  443 
  444         /*
  445          * Send the PIO_READ_CONFIG command.
  446          */
  447         outb((base + HA_WCOMMAND), EATA_CMD_PIO_READ_CONFIG);
  448 
  449         /*
  450          * Read the data into the struct.
  451          */
  452         p = (u_int16_t *)conf;
  453         for (i = 0; i < (sizeof(dpt_conf_t) / 2); i++) {
  454 
  455                 if (dpt_pio_wait(base, HA_RSTATUS, HA_SDRQ, 0)) {
  456                         if (bootverbose)
  457                                 printf("dpt: timeout in data read.\n");
  458                         return (NULL);
  459                 }
  460 
  461                 (*p) = inw(base + HA_RDATA);
  462                 p++;
  463         }
  464 
  465         if (inb(base + HA_RSTATUS) & HA_SERROR) {
  466                 if (bootverbose)
  467                         printf("dpt: error reading configuration data.\n");
  468                 return (NULL);
  469         }
  470 
  471 #define BE_EATA_SIGNATURE       0x45415441
  472 #define LE_EATA_SIGNATURE       0x41544145
  473 
  474         /*
  475          * Test to see if we have a valid card.
  476          */
  477         if ((conf->signature == BE_EATA_SIGNATURE) ||
  478             (conf->signature == LE_EATA_SIGNATURE)) {
  479 
  480                 while (inb(base + HA_RSTATUS) & HA_SDRQ) {
  481                         inw(base + HA_RDATA);
  482                 }
  483 
  484                 return (conf);
  485         }
  486         return (NULL);
  487 }
  488 #endif
  489 
  490 /*
  491  * Read a configuration page into the supplied dpt_cont_t buffer.
  492  */
  493 static int
  494 dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
  495              u_int size, u_int page, u_int target, int extent)
  496 {
  497         eata_ccb_t *cp;
  498 
  499         u_int8_t   status;
  500 
  501         int        ndx;
  502         int        ospl;
  503         int        result;
  504 
  505         cp = &dccb->eata_ccb;
  506         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(*dpt->sp));
  507 
  508         cp->Interpret = 1;
  509         cp->DataIn = 1;
  510         cp->Auto_Req_Sen = 1;
  511         cp->reqlen = sizeof(struct scsi_sense_data);
  512 
  513         cp->cp_id = target;
  514         cp->cp_LUN = 0;         /* In the EATA packet */
  515         cp->cp_lun = 0;         /* In the SCSI command */
  516 
  517         cp->cp_scsi_cmd = INQUIRY;
  518         cp->cp_len = size;
  519 
  520         cp->cp_extent = extent;
  521 
  522         cp->cp_page = page;
  523         cp->cp_channel = 0;     /* DNC, Interpret mode is set */
  524         cp->cp_identify = 1;
  525         cp->cp_datalen = htonl(size);
  526 
  527         ospl = splcam();
  528 
  529         /*
  530          * This could be a simple for loop, but we suspected the compiler To
  531          * have optimized it a bit too much. Wait for the controller to
  532          * become ready
  533          */
  534         while (((status = dpt_inb(dpt, HA_RSTATUS)) != (HA_SREADY | HA_SSC)
  535              && (status != (HA_SREADY | HA_SSC | HA_SERROR))
  536              && (status != (HA_SDRDY | HA_SERROR | HA_SDRQ)))
  537             || (dpt_wait(dpt, HA_SBUSY, 0))) {
  538 
  539                 /*
  540                  * RAID Drives still Spinning up? (This should only occur if
  541                  * the DPT controller is in a NON PC (PCI?) platform).
  542                  */
  543                 if (dpt_raid_busy(dpt)) {
  544                         printf("dpt%d WARNING: Get_conf() RSUS failed.\n",
  545                                dpt->unit);
  546                         splx(ospl);
  547                         return (0);
  548                 }
  549         }
  550 
  551         DptStat_Reset_BUSY(dpt->sp);
  552 
  553         /*
  554          * XXXX We might want to do something more clever than aborting at
  555          * this point, like resetting (rebooting) the controller and trying
  556          * again.
  557          */
  558         if ((result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
  559                                             EATA_CMD_DMA_SEND_CP,
  560                                             10000, 0, 0, 0)) != 0) {
  561                 printf("dpt%d WARNING: Get_conf() failed (%d) to send "
  562                        "EATA_CMD_DMA_READ_CONFIG\n",
  563                        dpt->unit, result);
  564                 splx(ospl);
  565                 return (0);
  566         }
  567         /* Wait for two seconds for a response.  This can be slow  */
  568         for (ndx = 0;
  569              (ndx < 20000)
  570              && !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
  571              ndx++) {
  572                 DELAY(50);
  573         }
  574 
  575         /* Grab the status and clear interrupts */
  576         status = dpt_inb(dpt, HA_RSTATUS);
  577 
  578         splx(ospl);
  579 
  580         /*
  581          * Check the status carefully.  Return only if the
  582          * command was successful.
  583          */
  584         if (((status & HA_SERROR) == 0)
  585          && (dpt->sp->hba_stat == 0)
  586          && (dpt->sp->scsi_stat == 0)
  587          && (dpt->sp->residue_len == 0))
  588                 return (0);
  589 
  590         if (dpt->sp->scsi_stat == SCSI_STATUS_CHECK_COND)
  591                 return (0);
  592 
  593         return (1);
  594 }
  595 
  596 /* Detect Cache parameters and size */
  597 static void
  598 dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
  599                  u_int8_t *buff)
  600 {
  601         eata_ccb_t *cp;
  602         u_int8_t   *param;
  603         int         bytes;
  604         int         result;
  605         int         ospl;
  606         int         ndx;
  607         u_int8_t    status;
  608 
  609         /*
  610          * Default setting, for best perfromance..
  611          * This is what virtually all cards default to..
  612          */
  613         dpt->cache_type = DPT_CACHE_WRITEBACK;
  614         dpt->cache_size = 0;
  615 
  616         cp = &dccb->eata_ccb;
  617         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(dpt->sp));
  618         bzero(buff, 512);
  619 
  620         /* Setup the command structure */
  621         cp->Interpret = 1;
  622         cp->DataIn = 1;
  623         cp->Auto_Req_Sen = 1;
  624         cp->reqlen = sizeof(struct scsi_sense_data);
  625 
  626         cp->cp_id = 0;          /* who cares?  The HBA will interpret.. */
  627         cp->cp_LUN = 0;         /* In the EATA packet */
  628         cp->cp_lun = 0;         /* In the SCSI command */
  629         cp->cp_channel = 0;
  630 
  631         cp->cp_scsi_cmd = EATA_CMD_DMA_SEND_CP;
  632         cp->cp_len = 56;
  633 
  634         cp->cp_extent = 0;
  635         cp->cp_page = 0;
  636         cp->cp_identify = 1;
  637         cp->cp_dispri = 1;
  638 
  639         /*
  640          * Build the EATA Command Packet structure
  641          * for a Log Sense Command.
  642          */
  643         cp->cp_cdb[0] = 0x4d;
  644         cp->cp_cdb[1] = 0x0;
  645         cp->cp_cdb[2] = 0x40 | 0x33;
  646         cp->cp_cdb[7] = 1;
  647 
  648         cp->cp_datalen = htonl(512);
  649 
  650         ospl = splcam();
  651         result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
  652                                        EATA_CMD_DMA_SEND_CP,
  653                                        10000, 0, 0, 0);
  654         if (result != 0) {
  655                 printf("dpt%d WARNING: detect_cache() failed (%d) to send "
  656                        "EATA_CMD_DMA_SEND_CP\n", dpt->unit, result);
  657                 splx(ospl);
  658                 return;
  659         }
  660         /* Wait for two seconds for a response.  This can be slow... */
  661         for (ndx = 0;
  662              (ndx < 20000) &&
  663              !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
  664              ndx++) {
  665                 DELAY(50);
  666         }
  667 
  668         /* Grab the status and clear interrupts */
  669         status = dpt_inb(dpt, HA_RSTATUS);
  670         splx(ospl);
  671 
  672         /*
  673          * Sanity check
  674          */
  675         if (buff[0] != 0x33) {
  676                 return;
  677         }
  678         bytes = DPT_HCP_LENGTH(buff);
  679         param = DPT_HCP_FIRST(buff);
  680 
  681         if (DPT_HCP_CODE(param) != 1) {
  682                 /*
  683                  * DPT Log Page layout error
  684                  */
  685                 printf("dpt%d: NOTICE: Log Page (1) layout error\n",
  686                        dpt->unit);
  687                 return;
  688         }
  689         if (!(param[4] & 0x4)) {
  690                 dpt->cache_type = DPT_NO_CACHE;
  691                 return;
  692         }
  693         while (DPT_HCP_CODE(param) != 6) {
  694                 param = DPT_HCP_NEXT(param);
  695                 if ((param < buff)
  696                  || (param >= &buff[bytes])) {
  697                         return;
  698                 }
  699         }
  700 
  701         if (param[4] & 0x2) {
  702                 /*
  703                  * Cache disabled
  704                  */
  705                 dpt->cache_type = DPT_NO_CACHE;
  706                 return;
  707         }
  708 
  709         if (param[4] & 0x4) {
  710                 dpt->cache_type = DPT_CACHE_WRITETHROUGH;
  711         }
  712 
  713         /* XXX This isn't correct.  This log parameter only has two bytes.... */
  714 #if 0
  715         dpt->cache_size = param[5]
  716                         | (param[6] << 8)
  717                         | (param[7] << 16)
  718                         | (param[8] << 24);
  719 #endif
  720 }
  721 
  722 static void
  723 dpt_poll(struct cam_sim *sim)
  724 {
  725         dpt_intr(cam_sim_softc(sim));
  726 }
  727 
  728 static void
  729 dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
  730 {
  731         struct   dpt_ccb *dccb;
  732         union    ccb *ccb;
  733         struct   dpt_softc *dpt;
  734         int      s;
  735 
  736         dccb = (struct dpt_ccb *)arg;
  737         ccb = dccb->ccb;
  738         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
  739 
  740         if (error != 0) {
  741                 if (error != EFBIG)
  742                         printf("dpt%d: Unexepected error 0x%x returned from "
  743                                "bus_dmamap_load\n", dpt->unit, error);
  744                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
  745                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
  746                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
  747                 }
  748                 dptfreeccb(dpt, dccb);
  749                 xpt_done(ccb);
  750                 return;
  751         }
  752                 
  753         if (nseg != 0) {
  754                 dpt_sg_t *sg;
  755                 bus_dma_segment_t *end_seg;
  756                 bus_dmasync_op_t op;
  757 
  758                 end_seg = dm_segs + nseg;
  759 
  760                 /* Copy the segments into our SG list */
  761                 sg = dccb->sg_list;
  762                 while (dm_segs < end_seg) {
  763                         sg->seg_len = htonl(dm_segs->ds_len);
  764                         sg->seg_addr = htonl(dm_segs->ds_addr);
  765                         sg++;
  766                         dm_segs++;
  767                 }
  768 
  769                 if (nseg > 1) {
  770                         dccb->eata_ccb.scatter = 1;
  771                         dccb->eata_ccb.cp_dataDMA = dccb->sg_busaddr;
  772                         dccb->eata_ccb.cp_datalen =
  773                             htonl(nseg * sizeof(dpt_sg_t));
  774                 } else {
  775                         dccb->eata_ccb.cp_dataDMA = dccb->sg_list[0].seg_addr;
  776                         dccb->eata_ccb.cp_datalen = dccb->sg_list[0].seg_len;
  777                 }
  778 
  779                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
  780                         op = BUS_DMASYNC_PREREAD;
  781                 else
  782                         op = BUS_DMASYNC_PREWRITE;
  783 
  784                 bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
  785 
  786         } else {
  787                 dccb->eata_ccb.cp_dataDMA = 0;
  788                 dccb->eata_ccb.cp_datalen = 0;
  789         }
  790 
  791         s = splcam();
  792 
  793         /*
  794          * Last time we need to check if this CCB needs to
  795          * be aborted.
  796          */
  797         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
  798                 if (nseg != 0)
  799                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
  800                 dptfreeccb(dpt, dccb);
  801                 xpt_done(ccb);
  802                 splx(s);
  803                 return;
  804         }
  805                 
  806         dccb->state |= DCCB_ACTIVE;
  807         ccb->ccb_h.status |= CAM_SIM_QUEUED;
  808         LIST_INSERT_HEAD(&dpt->pending_ccb_list, &ccb->ccb_h, sim_links.le);
  809         ccb->ccb_h.timeout_ch =
  810             timeout(dpttimeout, (caddr_t)dccb,
  811                     (ccb->ccb_h.timeout * hz) / 1000);
  812         if (dpt_send_eata_command(dpt, &dccb->eata_ccb,
  813                                   dccb->eata_ccb.cp_busaddr,
  814                                   EATA_CMD_DMA_SEND_CP, 0, 0, 0, 0) != 0) {
  815                 ccb->ccb_h.status = CAM_NO_HBA; /* HBA dead or just busy?? */
  816                 if (nseg != 0)
  817                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
  818                 dptfreeccb(dpt, dccb);
  819                 xpt_done(ccb);
  820         }
  821 
  822         splx(s);
  823 }
  824 
  825 static void
  826 dpt_action(struct cam_sim *sim, union ccb *ccb)
  827 {
  828         struct    dpt_softc *dpt;
  829 
  830         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("dpt_action\n"));
  831         
  832         dpt = (struct dpt_softc *)cam_sim_softc(sim);
  833 
  834         if ((dpt->state & DPT_HA_SHUTDOWN_ACTIVE) != 0) {
  835                 xpt_print_path(ccb->ccb_h.path);
  836                 printf("controller is shutdown. Aborting CCB.\n");
  837                 ccb->ccb_h.status = CAM_NO_HBA;
  838                 xpt_done(ccb);
  839                 return;
  840         }
  841 
  842         switch (ccb->ccb_h.func_code) {
  843         /* Common cases first */
  844         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
  845         {
  846                 struct  ccb_scsiio *csio;
  847                 struct  ccb_hdr *ccbh;
  848                 struct  dpt_ccb *dccb;
  849                 struct  eata_ccb *eccb;
  850 
  851                 csio = &ccb->csio;
  852                 ccbh = &ccb->ccb_h;
  853                 /* Max CDB length is 12 bytes */
  854                 if (csio->cdb_len > 12) { 
  855                         ccb->ccb_h.status = CAM_REQ_INVALID;
  856                         xpt_done(ccb);
  857                         return;
  858                 }
  859                 if ((dccb = dptgetccb(dpt)) == NULL) {
  860                         int s;
  861         
  862                         s = splcam();
  863                         dpt->resource_shortage = 1;
  864                         splx(s);
  865                         xpt_freeze_simq(sim, /*count*/1);
  866                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
  867                         xpt_done(ccb);
  868                         return;
  869                 }
  870                 eccb = &dccb->eata_ccb;
  871 
  872                 /* Link dccb and ccb so we can find one from the other */
  873                 dccb->ccb = ccb;
  874                 ccb->ccb_h.ccb_dccb_ptr = dccb;
  875                 ccb->ccb_h.ccb_dpt_ptr = dpt;
  876 
  877                 /*
  878                  * Explicitly set all flags so that the compiler can
  879                  * be smart about setting them.
  880                  */
  881                 eccb->SCSI_Reset = 0;
  882                 eccb->HBA_Init = 0;
  883                 eccb->Auto_Req_Sen = (ccb->ccb_h.flags & CAM_DIS_AUTOSENSE)
  884                                    ? 0 : 1;
  885                 eccb->scatter = 0;
  886                 eccb->Quick = 0;
  887                 eccb->Interpret =
  888                     ccb->ccb_h.target_id == dpt->hostid[cam_sim_bus(sim)]
  889                     ? 1 : 0;
  890                 eccb->DataOut = (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
  891                 eccb->DataIn = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
  892                 eccb->reqlen = csio->sense_len;
  893                 eccb->cp_id = ccb->ccb_h.target_id;
  894                 eccb->cp_channel = cam_sim_bus(sim);
  895                 eccb->cp_LUN = ccb->ccb_h.target_lun;
  896                 eccb->cp_luntar = 0;
  897                 eccb->cp_dispri = (ccb->ccb_h.flags & CAM_DIS_DISCONNECT)
  898                                 ? 0 : 1;
  899                 eccb->cp_identify = 1;
  900 
  901                 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0
  902                  && csio->tag_action != CAM_TAG_ACTION_NONE) {
  903                         eccb->cp_msg[0] = csio->tag_action;
  904                         eccb->cp_msg[1] = dccb->tag;
  905                 } else {
  906                         eccb->cp_msg[0] = 0;
  907                         eccb->cp_msg[1] = 0;
  908                 }
  909                 eccb->cp_msg[2] = 0;
  910 
  911                 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
  912                         if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
  913                                 bcopy(csio->cdb_io.cdb_ptr,
  914                                       eccb->cp_cdb, csio->cdb_len);
  915                         } else {
  916                                 /* I guess I could map it in... */
  917                                 ccb->ccb_h.status = CAM_REQ_INVALID;
  918                                 dptfreeccb(dpt, dccb);
  919                                 xpt_done(ccb);
  920                                 return;
  921                         }
  922                 } else {
  923                         bcopy(csio->cdb_io.cdb_bytes,
  924                               eccb->cp_cdb, csio->cdb_len);
  925                 }
  926                 /*
  927                  * If we have any data to send with this command,
  928                  * map it into bus space.
  929                  */
  930                 /* Only use S/G if there is a transfer */
  931                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
  932                         if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
  933                                 /*
  934                                  * We've been given a pointer
  935                                  * to a single buffer.
  936                                  */
  937                                 if ((ccbh->flags & CAM_DATA_PHYS) == 0) {
  938                                         int s;
  939                                         int error;
  940 
  941                                         s = splsoftvm();
  942                                         error =
  943                                             bus_dmamap_load(dpt->buffer_dmat,
  944                                                             dccb->dmamap,
  945                                                             csio->data_ptr,
  946                                                             csio->dxfer_len,
  947                                                             dptexecuteccb,
  948                                                             dccb, /*flags*/0);
  949                                         if (error == EINPROGRESS) {
  950                                                 /*
  951                                                  * So as to maintain ordering,
  952                                                  * freeze the controller queue
  953                                                  * until our mapping is
  954                                                  * returned.
  955                                                  */
  956                                                 xpt_freeze_simq(sim, 1);
  957                                                 dccb->state |= CAM_RELEASE_SIMQ;
  958                                         }
  959                                         splx(s);
  960                                 } else {
  961                                         struct bus_dma_segment seg; 
  962 
  963                                         /* Pointer to physical buffer */
  964                                         seg.ds_addr =
  965                                             (bus_addr_t)csio->data_ptr;
  966                                         seg.ds_len = csio->dxfer_len;
  967                                         dptexecuteccb(dccb, &seg, 1, 0);
  968                                 }
  969                         } else {
  970                                 struct bus_dma_segment *segs;
  971 
  972                                 if ((ccbh->flags & CAM_DATA_PHYS) != 0)
  973                                         panic("dpt_action - Physical "
  974                                               "segment pointers "
  975                                               "unsupported");
  976 
  977                                 if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
  978                                         panic("dpt_action - Virtual "
  979                                               "segment addresses "
  980                                               "unsupported");
  981 
  982                                 /* Just use the segments provided */
  983                                 segs = (struct bus_dma_segment *)csio->data_ptr;
  984                                 dptexecuteccb(dccb, segs, csio->sglist_cnt, 0);
  985                         }
  986                 } else {
  987                         /*
  988                          * XXX JGibbs.
  989                          * Does it want them both on or both off?
  990                          * CAM_DIR_NONE is both on, so this code can
  991                          * be removed if this is also what the DPT
  992                          * exptects.
  993                          */
  994                         eccb->DataOut = 0;
  995                         eccb->DataIn = 0;
  996                         dptexecuteccb(dccb, NULL, 0, 0);
  997                 }
  998                 break;
  999         }
 1000         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
 1001         case XPT_ABORT:                 /* Abort the specified CCB */
 1002                 /* XXX Implement */
 1003                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1004                 xpt_done(ccb);
 1005                 break;
 1006         case XPT_SET_TRAN_SETTINGS:
 1007         {
 1008                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 1009                 xpt_done(ccb);  
 1010                 break;
 1011         }
 1012         case XPT_GET_TRAN_SETTINGS:
 1013         /* Get default/user set transfer settings for the target */
 1014         {
 1015                 struct  ccb_trans_settings *cts = &ccb->cts;
 1016                 struct ccb_trans_settings_scsi *scsi =
 1017                     &cts->proto_specific.scsi;
 1018                 struct ccb_trans_settings_spi *spi =
 1019                     &cts->xport_specific.spi;
 1020 
 1021                 cts->protocol = PROTO_SCSI;
 1022                 cts->protocol_version = SCSI_REV_2;
 1023                 cts->transport = XPORT_SPI;
 1024                 cts->transport_version = 2;
 1025  
 1026                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
 1027                         spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 1028                         spi->bus_width = (dpt->max_id > 7)
 1029                                        ? MSG_EXT_WDTR_BUS_8_BIT
 1030                                        : MSG_EXT_WDTR_BUS_16_BIT;
 1031                         spi->sync_period = 25; /* 10MHz */
 1032                         if (spi->sync_period != 0)
 1033                                 spi->sync_offset = 15;
 1034                         scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 1035 
 1036                         spi->valid = CTS_SPI_VALID_SYNC_RATE
 1037                                 | CTS_SPI_VALID_SYNC_OFFSET
 1038                                 | CTS_SPI_VALID_SYNC_RATE
 1039                                 | CTS_SPI_VALID_BUS_WIDTH
 1040                                 | CTS_SPI_VALID_DISC;
 1041                         scsi->valid = CTS_SCSI_VALID_TQ;
 1042                         ccb->ccb_h.status = CAM_REQ_CMP;
 1043                 } else {
 1044                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 1045                 }
 1046                 xpt_done(ccb);
 1047                 break;
 1048         }
 1049         case XPT_CALC_GEOMETRY:
 1050         {
 1051                 /*
 1052                  * XXX Use Adaptec translation until I find out how to
 1053                  *     get this information from the card.
 1054                  */
 1055                 cam_calc_geometry(&ccb->ccg, /*extended*/1);
 1056                 xpt_done(ccb);
 1057                 break;
 1058         }
 1059         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
 1060         {
 1061                 /* XXX Implement */
 1062                 ccb->ccb_h.status = CAM_REQ_CMP;
 1063                 xpt_done(ccb);
 1064                 break;
 1065         }
 1066         case XPT_TERM_IO:               /* Terminate the I/O process */
 1067                 /* XXX Implement */
 1068                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1069                 xpt_done(ccb);
 1070                 break;
 1071         case XPT_PATH_INQ:              /* Path routing inquiry */
 1072         {
 1073                 struct ccb_pathinq *cpi = &ccb->cpi;
 1074                 
 1075                 cpi->version_num = 1;
 1076                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
 1077                 if (dpt->max_id > 7)
 1078                         cpi->hba_inquiry |= PI_WIDE_16;
 1079                 cpi->target_sprt = 0;
 1080                 cpi->hba_misc = 0;
 1081                 cpi->hba_eng_cnt = 0;
 1082                 cpi->max_target = dpt->max_id;
 1083                 cpi->max_lun = dpt->max_lun;
 1084                 cpi->initiator_id = dpt->hostid[cam_sim_bus(sim)];
 1085                 cpi->bus_id = cam_sim_bus(sim);
 1086                 cpi->base_transfer_speed = 3300;
 1087                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 1088                 strncpy(cpi->hba_vid, "DPT", HBA_IDLEN);
 1089                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 1090                 cpi->unit_number = cam_sim_unit(sim);
 1091                 cpi->transport = XPORT_SPI;
 1092                 cpi->transport_version = 2;
 1093                 cpi->protocol = PROTO_SCSI;
 1094                 cpi->protocol_version = SCSI_REV_2;
 1095                 cpi->ccb_h.status = CAM_REQ_CMP;
 1096                 xpt_done(ccb);
 1097                 break;
 1098         }
 1099         default:
 1100                 ccb->ccb_h.status = CAM_REQ_INVALID;
 1101                 xpt_done(ccb);
 1102                 break;
 1103         }
 1104 }
 1105 
 1106 /*
 1107  * This routine will try to send an EATA command to the DPT HBA.
 1108  * It will, by default, try 20,000 times, waiting 50us between tries.
 1109  * It returns 0 on success and 1 on failure.
 1110  * It is assumed to be called at splcam().
 1111  */
 1112 static int
 1113 dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
 1114                       u_int32_t cmd_busaddr, u_int command, u_int retries,
 1115                       u_int ifc, u_int code, u_int code2)
 1116 {
 1117         u_int   loop;
 1118         
 1119         if (!retries)
 1120                 retries = 20000;
 1121 
 1122         /*
 1123          * I hate this polling nonsense. Wish there was a way to tell the DPT
 1124          * to go get commands at its own pace,  or to interrupt when ready.
 1125          * In the mean time we will measure how many itterations it really
 1126          * takes.
 1127          */
 1128         for (loop = 0; loop < retries; loop++) {
 1129                 if ((dpt_inb(dpt, HA_RAUXSTAT) & HA_ABUSY) == 0)
 1130                         break;
 1131                 else
 1132                         DELAY(50);
 1133         }
 1134 
 1135         if (loop < retries) {
 1136 #ifdef DPT_MEASURE_PERFORMANCE
 1137                 if (loop > dpt->performance.max_eata_tries)
 1138                         dpt->performance.max_eata_tries = loop;
 1139 
 1140                 if (loop < dpt->performance.min_eata_tries)
 1141                         dpt->performance.min_eata_tries = loop;
 1142 #endif
 1143         } else {
 1144 #ifdef DPT_MEASURE_PERFORMANCE
 1145                 ++dpt->performance.command_too_busy;
 1146 #endif
 1147                 return (1);
 1148         }
 1149 
 1150         /* The controller is alive, advance the wedge timer */
 1151 #ifdef DPT_RESET_HBA
 1152         dpt->last_contact = microtime_now;
 1153 #endif
 1154 
 1155         if (cmd_block == NULL)
 1156                 cmd_busaddr = 0;
 1157 #if (BYTE_ORDER == BIG_ENDIAN)
 1158         else {
 1159                 cmd_busaddr = ((cmd_busaddr >> 24) & 0xFF)
 1160                             | ((cmd_busaddr >> 16) & 0xFF)
 1161                             | ((cmd_busaddr >> 8) & 0xFF)
 1162                             | (cmd_busaddr & 0xFF);
 1163         }
 1164 #endif
 1165         /* And now the address */
 1166         dpt_outl(dpt, HA_WDMAADDR, cmd_busaddr);
 1167 
 1168         if (command == EATA_CMD_IMMEDIATE) {
 1169                 if (cmd_block == NULL) {
 1170                         dpt_outb(dpt, HA_WCODE2, code2);
 1171                         dpt_outb(dpt, HA_WCODE, code);
 1172                 }
 1173                 dpt_outb(dpt, HA_WIFC, ifc);
 1174         }
 1175         dpt_outb(dpt, HA_WCOMMAND, command);
 1176 
 1177         return (0);
 1178 }
 1179 
 1180 
 1181 /* ==================== Exported Function definitions =======================*/
 1182 void
 1183 dpt_alloc(device_t dev)
 1184 {
 1185         dpt_softc_t     *dpt = device_get_softc(dev);
 1186         int    i;
 1187 
 1188         dpt->tag = rman_get_bustag(dpt->io_res);
 1189         dpt->bsh = rman_get_bushandle(dpt->io_res) + dpt->io_offset;
 1190         dpt->unit = device_get_unit(dev);
 1191         SLIST_INIT(&dpt->free_dccb_list);
 1192         LIST_INIT(&dpt->pending_ccb_list);
 1193         for (i = 0; i < MAX_CHANNELS; i++)
 1194                 dpt->resetlevel[i] = DPT_HA_OK;
 1195 
 1196 #ifdef DPT_MEASURE_PERFORMANCE
 1197         dpt_reset_performance(dpt);
 1198 #endif /* DPT_MEASURE_PERFORMANCE */
 1199         return;
 1200 }
 1201 
 1202 void
 1203 dpt_free(struct dpt_softc *dpt)
 1204 {
 1205         switch (dpt->init_level) {
 1206         default:
 1207         case 5:
 1208                 bus_dmamap_unload(dpt->dccb_dmat, dpt->dccb_dmamap);
 1209         case 4:
 1210                 bus_dmamem_free(dpt->dccb_dmat, dpt->dpt_dccbs,
 1211                                 dpt->dccb_dmamap);
 1212                 bus_dmamap_destroy(dpt->dccb_dmat, dpt->dccb_dmamap);
 1213         case 3:
 1214                 bus_dma_tag_destroy(dpt->dccb_dmat);
 1215         case 2:
 1216                 bus_dma_tag_destroy(dpt->buffer_dmat);
 1217         case 1:
 1218         {
 1219                 struct sg_map_node *sg_map;
 1220 
 1221                 while ((sg_map = SLIST_FIRST(&dpt->sg_maps)) != NULL) {
 1222                         SLIST_REMOVE_HEAD(&dpt->sg_maps, links);
 1223                         bus_dmamap_unload(dpt->sg_dmat,
 1224                                           sg_map->sg_dmamap);
 1225                         bus_dmamem_free(dpt->sg_dmat, sg_map->sg_vaddr,
 1226                                         sg_map->sg_dmamap);
 1227                         free(sg_map, M_DEVBUF);
 1228                 }
 1229                 bus_dma_tag_destroy(dpt->sg_dmat);
 1230         }
 1231         case 0:
 1232                 break;
 1233         }
 1234 }
 1235 
 1236 int
 1237 dpt_alloc_resources (device_t dev)
 1238 {
 1239         dpt_softc_t *   dpt;
 1240         int             error;
 1241 
 1242         dpt = device_get_softc(dev);
 1243 
 1244         dpt->io_res = bus_alloc_resource_any(dev, dpt->io_type, &dpt->io_rid,
 1245                                              RF_ACTIVE);
 1246         if (dpt->io_res == NULL) {
 1247                 device_printf(dev, "No I/O space?!\n");
 1248                 error = ENOMEM;
 1249                 goto bad;
 1250         }
 1251 
 1252         dpt->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &dpt->irq_rid,
 1253                                               RF_ACTIVE);
 1254         if (dpt->irq_res == NULL) {
 1255                 device_printf(dev, "No IRQ!\n");
 1256                 error = ENOMEM;
 1257                 goto bad;
 1258         }
 1259 
 1260         return (0);
 1261 bad:
 1262         return(error);
 1263 }
 1264 
 1265 
 1266 void
 1267 dpt_release_resources (device_t dev)
 1268 {
 1269         struct dpt_softc *      dpt;
 1270 
 1271         dpt = device_get_softc(dev);
 1272 
 1273         if (dpt->ih)
 1274                 bus_teardown_intr(dev, dpt->irq_res, dpt->ih);
 1275         if (dpt->io_res)
 1276                 bus_release_resource(dev, dpt->io_type, dpt->io_rid, dpt->io_res);
 1277         if (dpt->irq_res)
 1278                 bus_release_resource(dev, SYS_RES_IRQ, dpt->irq_rid, dpt->irq_res);
 1279         if (dpt->drq_res)
 1280                 bus_release_resource(dev, SYS_RES_DRQ, dpt->drq_rid, dpt->drq_res);
 1281 
 1282         return;
 1283 }
 1284 
 1285 static u_int8_t string_sizes[] =
 1286 {
 1287         sizeof(((dpt_inq_t*)NULL)->vendor),
 1288         sizeof(((dpt_inq_t*)NULL)->modelNum),
 1289         sizeof(((dpt_inq_t*)NULL)->firmware),
 1290         sizeof(((dpt_inq_t*)NULL)->protocol),
 1291 };
 1292 
 1293 int
 1294 dpt_init(struct dpt_softc *dpt)
 1295 {
 1296         dpt_conf_t  conf;
 1297         struct      sg_map_node *sg_map;
 1298         dpt_ccb_t  *dccb;
 1299         u_int8_t   *strp;
 1300         int         index;
 1301         int         i;
 1302         int         retval;
 1303 
 1304         dpt->init_level = 0;
 1305         SLIST_INIT(&dpt->sg_maps);
 1306 
 1307 #ifdef DPT_RESET_BOARD
 1308         printf("dpt%d: resetting HBA\n", dpt->unit);
 1309         dpt_outb(dpt, HA_WCOMMAND, EATA_CMD_RESET);
 1310         DELAY(750000);
 1311         /* XXX Shouldn't we poll a status register or something??? */
 1312 #endif
 1313         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
 1314         if (bus_dma_tag_create( /* parent       */ dpt->parent_dmat,
 1315                                 /* alignment    */ 1,
 1316                                 /* boundary     */ 0,
 1317                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
 1318                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 1319                                 /* filter       */ NULL,
 1320                                 /* filterarg    */ NULL,
 1321                                 /* maxsize      */ PAGE_SIZE,
 1322                                 /* nsegments    */ 1,
 1323                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 1324                                 /* flags        */ 0,
 1325                                 /* lockfunc     */ busdma_lock_mutex,
 1326                                 /* lockarg      */ &Giant,
 1327                                 &dpt->sg_dmat) != 0) {
 1328                 goto error_exit;
 1329         }
 1330 
 1331         dpt->init_level++;
 1332 
 1333         /*
 1334          * We allocate our DPT ccbs as a contiguous array of bus dma'able
 1335          * memory.  To get the allocation size, we need to know how many
 1336          * ccbs the card supports.  This requires a ccb.  We solve this
 1337          * chicken and egg problem by allocating some re-usable S/G space
 1338          * up front, and treating it as our status packet, CCB, and target
 1339          * memory space for these commands.
 1340          */
 1341         sg_map = dptallocsgmap(dpt);
 1342         if (sg_map == NULL)
 1343                 goto error_exit;
 1344 
 1345         dpt->sp = (volatile dpt_sp_t *)sg_map->sg_vaddr;
 1346         dccb = (struct dpt_ccb *)(uintptr_t)(volatile void *)&dpt->sp[1];
 1347         bzero(dccb, sizeof(*dccb));
 1348         dpt->sp_physaddr = sg_map->sg_physaddr;
 1349         dccb->eata_ccb.cp_dataDMA =
 1350             htonl(sg_map->sg_physaddr + sizeof(dpt_sp_t) + sizeof(*dccb));
 1351         dccb->eata_ccb.cp_busaddr = ~0;
 1352         dccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
 1353         dccb->eata_ccb.cp_reqDMA = htonl(dpt->sp_physaddr + sizeof(*dccb)
 1354                                        + offsetof(struct dpt_ccb, sense_data));
 1355 
 1356         /* Okay.  Fetch our config */
 1357         bzero(&dccb[1], sizeof(conf)); /* data area */
 1358         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
 1359                               sizeof(conf), 0xc1, 7, 1);
 1360 
 1361         if (retval != 0) {
 1362                 printf("dpt%d: Failed to get board configuration\n", dpt->unit);
 1363                 return (retval);
 1364         }
 1365         bcopy(&dccb[1], &conf, sizeof(conf));
 1366 
 1367         bzero(&dccb[1], sizeof(dpt->board_data));
 1368         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
 1369                               sizeof(dpt->board_data), 0, conf.scsi_id0, 0);
 1370         if (retval != 0) {
 1371                 printf("dpt%d: Failed to get inquiry information\n", dpt->unit);
 1372                 return (retval);
 1373         }
 1374         bcopy(&dccb[1], &dpt->board_data, sizeof(dpt->board_data));
 1375 
 1376         dpt_detect_cache(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
 1377                          (u_int8_t *)&dccb[1]);
 1378 
 1379         switch (ntohl(conf.splen)) {
 1380         case DPT_EATA_REVA:
 1381                 dpt->EATA_revision = 'a';
 1382                 break;
 1383         case DPT_EATA_REVB:
 1384                 dpt->EATA_revision = 'b';
 1385                 break;
 1386         case DPT_EATA_REVC:
 1387                 dpt->EATA_revision = 'c';
 1388                 break;
 1389         case DPT_EATA_REVZ:
 1390                 dpt->EATA_revision = 'z';
 1391                 break;
 1392         default:
 1393                 dpt->EATA_revision = '?';
 1394         }
 1395 
 1396         dpt->max_id      = conf.MAX_ID;
 1397         dpt->max_lun     = conf.MAX_LUN;
 1398         dpt->irq         = conf.IRQ;
 1399         dpt->dma_channel = (8 - conf.DMA_channel) & 7;
 1400         dpt->channels    = conf.MAX_CHAN + 1;
 1401         dpt->state      |= DPT_HA_OK;
 1402         if (conf.SECOND)
 1403                 dpt->primary = FALSE;
 1404         else
 1405                 dpt->primary = TRUE;
 1406 
 1407         dpt->more_support = conf.MORE_support;
 1408 
 1409         if (strncmp(dpt->board_data.firmware, "07G0", 4) >= 0)
 1410                 dpt->immediate_support = 1;
 1411         else
 1412                 dpt->immediate_support = 0;
 1413 
 1414         dpt->broken_INQUIRY = FALSE;
 1415 
 1416         dpt->cplen = ntohl(conf.cplen);
 1417         dpt->cppadlen = ntohs(conf.cppadlen);
 1418         dpt->max_dccbs = ntohs(conf.queuesiz);
 1419 
 1420         if (dpt->max_dccbs > 256) {
 1421                 printf("dpt%d: Max CCBs reduced from %d to "
 1422                        "256 due to tag algorithm\n", dpt->unit, dpt->max_dccbs);
 1423                 dpt->max_dccbs = 256;
 1424         }
 1425 
 1426         dpt->hostid[0] = conf.scsi_id0;
 1427         dpt->hostid[1] = conf.scsi_id1;
 1428         dpt->hostid[2] = conf.scsi_id2;
 1429 
 1430         if (conf.SG_64K)
 1431                 dpt->sgsize = 8192;
 1432         else
 1433                 dpt->sgsize = ntohs(conf.SGsiz);
 1434 
 1435         /* We can only get 64k buffers, so don't bother to waste space. */
 1436         if (dpt->sgsize < 17 || dpt->sgsize > 32)
 1437                 dpt->sgsize = 32; 
 1438 
 1439         if (dpt->sgsize > dpt_max_segs)
 1440                 dpt->sgsize = dpt_max_segs;
 1441         
 1442         /* DMA tag for mapping buffers into device visible space. */
 1443         if (bus_dma_tag_create( /* parent       */ dpt->parent_dmat,
 1444                                 /* alignment    */ 1,
 1445                                 /* boundary     */ 0,
 1446                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
 1447                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 1448                                 /* filter       */ NULL,
 1449                                 /* filterarg    */ NULL,
 1450                                 /* maxsize      */ MAXBSIZE,
 1451                                 /* nsegments    */ dpt->sgsize,
 1452                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 1453                                 /* flags        */ BUS_DMA_ALLOCNOW,
 1454                                 /* lockfunc     */ busdma_lock_mutex,
 1455                                 /* lockarg      */ &Giant,
 1456                                 &dpt->buffer_dmat) != 0) {
 1457                 printf("dpt: bus_dma_tag_create(...,dpt->buffer_dmat) failed\n");
 1458                 goto error_exit;
 1459         }
 1460 
 1461         dpt->init_level++;
 1462 
 1463         /* DMA tag for our ccb structures and interrupt status packet */
 1464         if (bus_dma_tag_create( /* parent       */ dpt->parent_dmat,
 1465                                 /* alignment    */ 1,
 1466                                 /* boundary     */ 0,
 1467                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
 1468                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 1469                                 /* filter       */ NULL,
 1470                                 /* filterarg    */ NULL,
 1471                                 /* maxsize      */ (dpt->max_dccbs *
 1472                                                     sizeof(struct dpt_ccb)) +
 1473                                                     sizeof(dpt_sp_t),
 1474                                 /* nsegments    */ 1,
 1475                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 1476                                 /* flags        */ 0,
 1477                                 /* lockfunc     */ busdma_lock_mutex,
 1478                                 /* lockarg      */ &Giant,
 1479                                 &dpt->dccb_dmat) != 0) {
 1480                 printf("dpt: bus_dma_tag_create(...,dpt->dccb_dmat) failed\n");
 1481                 goto error_exit;
 1482         }
 1483 
 1484         dpt->init_level++;
 1485 
 1486         /* Allocation for our ccbs and interrupt status packet */
 1487         if (bus_dmamem_alloc(dpt->dccb_dmat, (void **)&dpt->dpt_dccbs,
 1488                              BUS_DMA_NOWAIT, &dpt->dccb_dmamap) != 0) {
 1489                 printf("dpt: bus_dmamem_alloc(dpt->dccb_dmat,...) failed\n");
 1490                 goto error_exit;
 1491         }
 1492 
 1493         dpt->init_level++;
 1494 
 1495         /* And permanently map them */
 1496         bus_dmamap_load(dpt->dccb_dmat, dpt->dccb_dmamap,
 1497                         dpt->dpt_dccbs,
 1498                         (dpt->max_dccbs * sizeof(struct dpt_ccb))
 1499                         + sizeof(dpt_sp_t),
 1500                         dptmapmem, &dpt->dpt_ccb_busbase, /*flags*/0);
 1501 
 1502         /* Clear them out. */
 1503         bzero(dpt->dpt_dccbs,
 1504               (dpt->max_dccbs * sizeof(struct dpt_ccb)) + sizeof(dpt_sp_t));
 1505 
 1506         dpt->dpt_ccb_busend = dpt->dpt_ccb_busbase;
 1507 
 1508         dpt->sp = (dpt_sp_t*)&dpt->dpt_dccbs[dpt->max_dccbs];
 1509         dpt->sp_physaddr = dpt->dpt_ccb_busbase
 1510                          + (dpt->max_dccbs * sizeof(dpt_ccb_t));
 1511         dpt->init_level++;
 1512 
 1513         /* Allocate our first batch of ccbs */
 1514         if (dptallocccbs(dpt) == 0) {
 1515                 printf("dpt: dptallocccbs(dpt) == 0\n");
 1516                 return (2);
 1517         }
 1518 
 1519         /* Prepare for Target Mode */
 1520         dpt->target_mode_enabled = 1;
 1521 
 1522         /* Nuke excess spaces from inquiry information */
 1523         strp = dpt->board_data.vendor;
 1524         for (i = 0; i < sizeof(string_sizes); i++) {
 1525                 index = string_sizes[i] - 1;    
 1526                 while (index && (strp[index] == ' '))
 1527                         strp[index--] = '\0';
 1528                 strp += string_sizes[i];
 1529         }
 1530 
 1531         printf("dpt%d: %.8s %.16s FW Rev. %.4s, ",
 1532                dpt->unit, dpt->board_data.vendor,
 1533                dpt->board_data.modelNum, dpt->board_data.firmware);
 1534 
 1535         printf("%d channel%s, ", dpt->channels, dpt->channels > 1 ? "s" : "");
 1536 
 1537         if (dpt->cache_type != DPT_NO_CACHE
 1538          && dpt->cache_size != 0) {
 1539                 printf("%s Cache, ",
 1540                        dpt->cache_type == DPT_CACHE_WRITETHROUGH
 1541                      ? "Write-Through" : "Write-Back");
 1542         }
 1543 
 1544         printf("%d CCBs\n", dpt->max_dccbs);
 1545         return (0);
 1546                 
 1547 error_exit:
 1548         return (1);
 1549 }
 1550 
 1551 int
 1552 dpt_attach(dpt_softc_t *dpt)
 1553 {
 1554         struct cam_devq *devq;
 1555         int i;
 1556 
 1557         /*
 1558          * Create the device queue for our SIM.
 1559          */
 1560         devq = cam_simq_alloc(dpt->max_dccbs);
 1561         if (devq == NULL)
 1562                 return (0);
 1563 
 1564         for (i = 0; i < dpt->channels; i++) {
 1565                 /*
 1566                  * Construct our SIM entry
 1567                  */
 1568                 dpt->sims[i] = cam_sim_alloc(dpt_action, dpt_poll, "dpt",
 1569                                              dpt, dpt->unit, &Giant,
 1570                                              /*untagged*/2,
 1571                                              /*tagged*/dpt->max_dccbs, devq);
 1572                 if (dpt->sims[i] == NULL) {
 1573                         if (i == 0)
 1574                                 cam_simq_free(devq);
 1575                         else
 1576                                 printf( "%s(): Unable to attach bus %d "
 1577                                         "due to resource shortage\n",
 1578                                         __func__, i);
 1579                         break;
 1580                 }
 1581 
 1582                 if (xpt_bus_register(dpt->sims[i], dpt->dev, i) != CAM_SUCCESS){
 1583                         cam_sim_free(dpt->sims[i], /*free_devq*/i == 0);
 1584                         dpt->sims[i] = NULL;
 1585                         break;
 1586                 }
 1587 
 1588                 if (xpt_create_path(&dpt->paths[i], /*periph*/NULL,
 1589                                     cam_sim_path(dpt->sims[i]),
 1590                                     CAM_TARGET_WILDCARD,
 1591                                     CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 1592                         xpt_bus_deregister(cam_sim_path(dpt->sims[i]));
 1593                         cam_sim_free(dpt->sims[i], /*free_devq*/i == 0);
 1594                         dpt->sims[i] = NULL;
 1595                         break;
 1596                 }
 1597 
 1598         }
 1599         if (i > 0)
 1600                 EVENTHANDLER_REGISTER(shutdown_final, dptshutdown,
 1601                                       dpt, SHUTDOWN_PRI_DEFAULT);
 1602         return (i);
 1603 }
 1604 
 1605 int
 1606 dpt_detach (device_t dev)
 1607 {
 1608         struct dpt_softc *      dpt;
 1609         int                     i;
 1610 
 1611         dpt = device_get_softc(dev);
 1612 
 1613         for (i = 0; i < dpt->channels; i++) {
 1614 #if 0
 1615                 xpt_async(AC_LOST_DEVICE, dpt->paths[i], NULL);
 1616 #endif
 1617                 xpt_free_path(dpt->paths[i]);
 1618                 xpt_bus_deregister(cam_sim_path(dpt->sims[i]));
 1619                 cam_sim_free(dpt->sims[i], /*free_devq*/TRUE);
 1620         }
 1621 
 1622         dptshutdown((void *)dpt, SHUTDOWN_PRI_DEFAULT);
 1623 
 1624         dpt_release_resources(dev);
 1625 
 1626         dpt_free(dpt);
 1627 
 1628         return (0);
 1629 }
 1630 
 1631 /*
 1632  * This is the interrupt handler for the DPT driver.
 1633  */
 1634 void
 1635 dpt_intr(void *arg)
 1636 {
 1637         dpt_softc_t    *dpt;
 1638         dpt_ccb_t      *dccb;
 1639         union ccb      *ccb;
 1640         u_int           status;
 1641         u_int           aux_status;
 1642         u_int           hba_stat;
 1643         u_int           scsi_stat;
 1644         u_int32_t       residue_len;    /* Number of bytes not transferred */
 1645 
 1646         dpt = (dpt_softc_t *)arg;
 1647 
 1648         /* First order of business is to check if this interrupt is for us */
 1649         while (((aux_status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ) != 0) {
 1650 
 1651                 /*
 1652                  * What we want to do now, is to capture the status, all of it,
 1653                  * move it where it belongs, wake up whoever sleeps waiting to
 1654                  * process this result, and get out of here.
 1655                  */
 1656                 if (dpt->sp->ccb_busaddr < dpt->dpt_ccb_busbase
 1657                  || dpt->sp->ccb_busaddr >= dpt->dpt_ccb_busend) {
 1658                         printf("Encountered bogus status packet\n");
 1659                         status = dpt_inb(dpt, HA_RSTATUS);
 1660                         return;
 1661                 }
 1662 
 1663                 dccb = dptccbptov(dpt, dpt->sp->ccb_busaddr);
 1664 
 1665                 dpt->sp->ccb_busaddr = ~0;
 1666 
 1667                 /* Ignore status packets with EOC not set */
 1668                 if (dpt->sp->EOC == 0) {
 1669                         printf("dpt%d ERROR: Request %d received with "
 1670                                "clear EOC.\n     Marking as LOST.\n",
 1671                                dpt->unit, dccb->transaction_id);
 1672 
 1673 #ifdef DPT_HANDLE_TIMEOUTS
 1674                         dccb->state |= DPT_CCB_STATE_MARKED_LOST;
 1675 #endif
 1676                         /* This CLEARS the interrupt! */
 1677                         status = dpt_inb(dpt, HA_RSTATUS);
 1678                         continue;
 1679                 }
 1680                 dpt->sp->EOC = 0;
 1681 
 1682                 /*
 1683                  * Double buffer the status information so the hardware can
 1684                  * work on updating the status packet while we decifer the
 1685                  * one we were just interrupted for.
 1686                  * According to Mark Salyzyn, we only need few pieces of it.
 1687                  */
 1688                 hba_stat = dpt->sp->hba_stat;
 1689                 scsi_stat = dpt->sp->scsi_stat;
 1690                 residue_len = dpt->sp->residue_len;
 1691 
 1692                 /* Clear interrupts, check for error */
 1693                 if ((status = dpt_inb(dpt, HA_RSTATUS)) & HA_SERROR) {
 1694                         /*
 1695                          * Error Condition. Check for magic cookie. Exit
 1696                          * this test on earliest sign of non-reset condition
 1697                          */
 1698 
 1699                         /* Check that this is not a board reset interrupt */
 1700                         if (dpt_just_reset(dpt)) {
 1701                                 printf("dpt%d: HBA rebooted.\n"
 1702                                        "      All transactions should be "
 1703                                        "resubmitted\n",
 1704                                        dpt->unit);
 1705 
 1706                                 printf("dpt%d: >>---->>  This is incomplete, "
 1707                                        "fix me....  <<----<<", dpt->unit);
 1708                                 panic("DPT Rebooted");
 1709 
 1710                         }
 1711                 }
 1712                 /* Process CCB */
 1713                 ccb = dccb->ccb;
 1714                 untimeout(dpttimeout, dccb, ccb->ccb_h.timeout_ch);
 1715                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 1716                         bus_dmasync_op_t op;
 1717 
 1718                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1719                                 op = BUS_DMASYNC_POSTREAD;
 1720                         else
 1721                                 op = BUS_DMASYNC_POSTWRITE;
 1722                         bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
 1723                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
 1724                 }
 1725 
 1726                 /* Common Case inline... */
 1727                 if (hba_stat == HA_NO_ERROR) {
 1728                         ccb->csio.scsi_status = scsi_stat;
 1729                         ccb->ccb_h.status = 0;
 1730                         switch (scsi_stat) {
 1731                         case SCSI_STATUS_OK:
 1732                                 ccb->ccb_h.status |= CAM_REQ_CMP;
 1733                                 break;
 1734                         case SCSI_STATUS_CHECK_COND:
 1735                         case SCSI_STATUS_CMD_TERMINATED:
 1736                                 bcopy(&dccb->sense_data, &ccb->csio.sense_data,
 1737                                       ccb->csio.sense_len);
 1738                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
 1739                                 /* FALLTHROUGH */
 1740                         default:
 1741                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 1742                                 /* XXX Freeze DevQ */
 1743                                 break;
 1744                         }
 1745                         ccb->csio.resid = residue_len;
 1746                         dptfreeccb(dpt, dccb);
 1747                         xpt_done(ccb);
 1748                 } else {
 1749                         dptprocesserror(dpt, dccb, ccb, hba_stat, scsi_stat,
 1750                                         residue_len);
 1751                 }
 1752         }
 1753 }
 1754 
 1755 static void
 1756 dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb, union ccb *ccb,
 1757                 u_int hba_stat, u_int scsi_stat, u_int32_t resid)
 1758 {
 1759         ccb->csio.resid = resid;
 1760         switch (hba_stat) {
 1761         case HA_ERR_SEL_TO:
 1762                 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
 1763                 break;
 1764         case HA_ERR_CMD_TO:
 1765                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
 1766                 break;
 1767         case HA_SCSIBUS_RESET:
 1768         case HA_HBA_POWER_UP:   /* Similar effect to a bus reset??? */
 1769                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 1770                 break;
 1771         case HA_CP_ABORTED:
 1772         case HA_CP_RESET:       /* XXX ??? */
 1773         case HA_CP_ABORT_NA:    /* XXX ??? */
 1774         case HA_CP_RESET_NA:    /* XXX ??? */
 1775                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)
 1776                         ccb->ccb_h.status = CAM_REQ_ABORTED;
 1777                 break;
 1778         case HA_PCI_PARITY:
 1779         case HA_PCI_MABORT:
 1780         case HA_PCI_TABORT:
 1781         case HA_PCI_STABORT:
 1782         case HA_BUS_PARITY:
 1783         case HA_PARITY_ERR:
 1784         case HA_ECC_ERR:
 1785                 ccb->ccb_h.status = CAM_UNCOR_PARITY;
 1786                 break;
 1787         case HA_UNX_MSGRJCT:
 1788                 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
 1789                 break;
 1790         case HA_UNX_BUSPHASE:
 1791                 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
 1792                 break;
 1793         case HA_UNX_BUS_FREE:
 1794                 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
 1795                 break;
 1796         case HA_SCSI_HUNG:
 1797         case HA_RESET_STUCK:
 1798                 /*
 1799                  * Dead???  Can the controller get unstuck
 1800                  * from these conditions
 1801                  */
 1802                 ccb->ccb_h.status = CAM_NO_HBA;
 1803                 break;
 1804         case HA_RSENSE_FAIL:
 1805                 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
 1806                 break;
 1807         default:
 1808                 printf("dpt%d: Undocumented Error %x\n", dpt->unit, hba_stat);
 1809                 printf("Please mail this message to shimon@simon-shapiro.org\n");
 1810                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 1811                 break;
 1812         }
 1813         dptfreeccb(dpt, dccb);
 1814         xpt_done(ccb);
 1815 }
 1816 
 1817 static void
 1818 dpttimeout(void *arg)
 1819 {
 1820         struct dpt_ccb   *dccb;
 1821         union  ccb       *ccb;
 1822         struct dpt_softc *dpt;
 1823         int               s;
 1824 
 1825         dccb = (struct dpt_ccb *)arg;
 1826         ccb = dccb->ccb;
 1827         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
 1828         xpt_print_path(ccb->ccb_h.path);
 1829         printf("CCB %p - timed out\n", (void *)dccb);
 1830 
 1831         s = splcam();
 1832 
 1833         /*
 1834          * Try to clear any pending jobs.  FreeBSD will lose interrupts,
 1835          * leaving the controller suspended, and commands timed-out.
 1836          * By calling the interrupt handler, any command thus stuck will be
 1837          * completed.
 1838          */
 1839         dpt_intr(dpt);
 1840         
 1841         if ((dccb->state & DCCB_ACTIVE) == 0) {
 1842                 xpt_print_path(ccb->ccb_h.path);
 1843                 printf("CCB %p - timed out CCB already completed\n",
 1844                        (void *)dccb);
 1845                 splx(s);
 1846                 return;
 1847         }
 1848 
 1849         /* Abort this particular command.  Leave all others running */
 1850         dpt_send_immediate(dpt, &dccb->eata_ccb, dccb->eata_ccb.cp_busaddr,
 1851                            /*retries*/20000, EATA_SPECIFIC_ABORT, 0, 0);
 1852         ccb->ccb_h.status = CAM_CMD_TIMEOUT;
 1853         splx(s);
 1854 }
 1855 
 1856 /*
 1857  * Shutdown the controller and ensure that the cache is completely flushed.
 1858  * Called from the shutdown_final event after all disk access has completed.
 1859  */
 1860 static void
 1861 dptshutdown(void *arg, int howto)
 1862 {
 1863         dpt_softc_t *dpt;
 1864 
 1865         dpt = (dpt_softc_t *)arg;
 1866 
 1867         printf("dpt%d: Shutting down (mode %x) HBA.     Please wait...\n",
 1868                dpt->unit, howto);
 1869 
 1870         /*
 1871          * What we do for a shutdown, is give the DPT early power loss warning
 1872          */
 1873         dpt_send_immediate(dpt, NULL, 0, EATA_POWER_OFF_WARN, 0, 0, 0);
 1874         DELAY(1000 * 1000 * 5);
 1875         printf("dpt%d: Controller was warned of shutdown and is now "
 1876                "disabled\n", dpt->unit);
 1877 }
 1878 
 1879 /*============================================================================*/
 1880 
 1881 #if 0
 1882 #ifdef DPT_RESET_HBA
 1883 
 1884 /*
 1885 **      Function name : dpt_reset_hba
 1886 **
 1887 **      Description : Reset the HBA and properly discard all pending work
 1888 **      Input :       Softc
 1889 **      Output :      Nothing
 1890 */
 1891 static void
 1892 dpt_reset_hba(dpt_softc_t *dpt)
 1893 {
 1894         eata_ccb_t       *ccb;
 1895         int               ospl;
 1896         dpt_ccb_t         dccb, *dccbp;
 1897         int               result;
 1898         struct scsi_xfer *xs;
 1899     
 1900         /* Prepare a control block.  The SCSI command part is immaterial */
 1901         dccb.xs = NULL;
 1902         dccb.flags = 0;
 1903         dccb.state = DPT_CCB_STATE_NEW;
 1904         dccb.std_callback = NULL;
 1905         dccb.wrbuff_callback = NULL;
 1906 
 1907         ccb = &dccb.eata_ccb;
 1908         ccb->CP_OpCode = EATA_CMD_RESET;
 1909         ccb->SCSI_Reset = 0;
 1910         ccb->HBA_Init = 1;
 1911         ccb->Auto_Req_Sen = 1;
 1912         ccb->cp_id = 0; /* Should be ignored */
 1913         ccb->DataIn = 1;
 1914         ccb->DataOut = 0;
 1915         ccb->Interpret = 1;
 1916         ccb->reqlen = htonl(sizeof(struct scsi_sense_data));
 1917         ccb->cp_statDMA = htonl(vtophys(&ccb->cp_statDMA));
 1918         ccb->cp_reqDMA = htonl(vtophys(&ccb->cp_reqDMA));
 1919         ccb->cp_viraddr = (u_int32_t) & ccb;
 1920 
 1921         ccb->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
 1922         ccb->cp_scsi_cmd = 0;  /* Should be ignored */
 1923 
 1924         /* Lock up the submitted queue.  We are very persistant here */
 1925         ospl = splcam();
 1926         while (dpt->queue_status & DPT_SUBMITTED_QUEUE_ACTIVE) {
 1927                 DELAY(100);
 1928         }
 1929         
 1930         dpt->queue_status |= DPT_SUBMITTED_QUEUE_ACTIVE;
 1931         splx(ospl);
 1932 
 1933         /* Send the RESET message */
 1934         if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
 1935                                             EATA_CMD_RESET, 0, 0, 0, 0)) != 0) {
 1936                 printf("dpt%d: Failed to send the RESET message.\n"
 1937                        "      Trying cold boot (ouch!)\n", dpt->unit);
 1938         
 1939         
 1940                 if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
 1941                                                     EATA_COLD_BOOT, 0, 0,
 1942                                                     0, 0)) != 0) {
 1943                         panic("dpt%d:  Faild to cold boot the HBA\n",
 1944                               dpt->unit);
 1945                 }
 1946 #ifdef DPT_MEASURE_PERFORMANCE
 1947                 dpt->performance.cold_boots++;
 1948 #endif /* DPT_MEASURE_PERFORMANCE */
 1949         }
 1950         
 1951 #ifdef DPT_MEASURE_PERFORMANCE
 1952         dpt->performance.warm_starts++;
 1953 #endif /* DPT_MEASURE_PERFORMANCE */
 1954         
 1955         printf("dpt%d:  Aborting pending requests.  O/S should re-submit\n",
 1956                dpt->unit);
 1957 
 1958         while ((dccbp = TAILQ_FIRST(&dpt->completed_ccbs)) != NULL) {
 1959                 struct scsi_xfer *xs = dccbp->xs;
 1960             
 1961                 /* Not all transactions have xs structs */
 1962                 if (xs != NULL) {
 1963                         /* Tell the kernel proper this did not complete well */
 1964                         xs->error |= XS_SELTIMEOUT;
 1965                         xs->flags |= SCSI_ITSDONE;
 1966                         scsi_done(xs);
 1967                 }
 1968             
 1969                 dpt_Qremove_submitted(dpt, dccbp);
 1970         
 1971                 /* Remember, Callbacks are NOT in the standard queue */
 1972                 if (dccbp->std_callback != NULL) {
 1973                         (dccbp->std_callback)(dpt, dccbp->eata_ccb.cp_channel,
 1974                                                dccbp);
 1975                 } else {
 1976                         ospl = splcam();
 1977                         dpt_Qpush_free(dpt, dccbp);
 1978                         splx(ospl);
 1979                 }
 1980         }
 1981 
 1982         printf("dpt%d: reset done aborting all pending commands\n", dpt->unit);
 1983         dpt->queue_status &= ~DPT_SUBMITTED_QUEUE_ACTIVE;
 1984 }
 1985 
 1986 #endif /* DPT_RESET_HBA */ 
 1987 
 1988 /*
 1989  * Build a Command Block for target mode READ/WRITE BUFFER,
 1990  * with the ``sync'' bit ON.
 1991  *
 1992  * Although the length and offset are 24 bit fields in the command, they cannot
 1993  * exceed 8192 bytes, so we take them as short integers andcheck their range.
 1994  * If they are sensless, we round them to zero offset, maximum length and
 1995  * complain.
 1996  */
 1997 
 1998 static void
 1999 dpt_target_ccb(dpt_softc_t * dpt, int bus, u_int8_t target, u_int8_t lun,
 2000                dpt_ccb_t * ccb, int mode, u_int8_t command,
 2001                u_int16_t length, u_int16_t offset)
 2002 {
 2003         eata_ccb_t     *cp;
 2004         int             ospl;
 2005 
 2006         if ((length + offset) > DPT_MAX_TARGET_MODE_BUFFER_SIZE) {
 2007                 printf("dpt%d:  Length of %d, and offset of %d are wrong\n",
 2008                        dpt->unit, length, offset);
 2009                 length = DPT_MAX_TARGET_MODE_BUFFER_SIZE;
 2010                 offset = 0;
 2011         }
 2012         ccb->xs = NULL;
 2013         ccb->flags = 0;
 2014         ccb->state = DPT_CCB_STATE_NEW;
 2015         ccb->std_callback = (ccb_callback) dpt_target_done;
 2016         ccb->wrbuff_callback = NULL;
 2017 
 2018         cp = &ccb->eata_ccb;
 2019         cp->CP_OpCode = EATA_CMD_DMA_SEND_CP;
 2020         cp->SCSI_Reset = 0;
 2021         cp->HBA_Init = 0;
 2022         cp->Auto_Req_Sen = 1;
 2023         cp->cp_id = target;
 2024         cp->DataIn = 1;
 2025         cp->DataOut = 0;
 2026         cp->Interpret = 0;
 2027         cp->reqlen = htonl(sizeof(struct scsi_sense_data));
 2028         cp->cp_statDMA = htonl(vtophys(&cp->cp_statDMA));
 2029         cp->cp_reqDMA = htonl(vtophys(&cp->cp_reqDMA));
 2030         cp->cp_viraddr = (u_int32_t) & ccb;
 2031 
 2032         cp->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
 2033 
 2034         cp->cp_scsi_cmd = command;
 2035         cp->cp_cdb[1] = (u_int8_t) (mode & SCSI_TM_MODE_MASK);
 2036         cp->cp_lun = lun;       /* Order is important here! */
 2037         cp->cp_cdb[2] = 0x00;   /* Buffer Id, only 1 :-( */
 2038         cp->cp_cdb[3] = (length >> 16) & 0xFF;  /* Buffer offset MSB */
 2039         cp->cp_cdb[4] = (length >> 8) & 0xFF;
 2040         cp->cp_cdb[5] = length & 0xFF;
 2041         cp->cp_cdb[6] = (length >> 16) & 0xFF;  /* Length MSB */
 2042         cp->cp_cdb[7] = (length >> 8) & 0xFF;
 2043         cp->cp_cdb[8] = length & 0xFF;  /* Length LSB */
 2044         cp->cp_cdb[9] = 0;      /* No sync, no match bits */
 2045 
 2046         /*
 2047          * This could be optimized to live in dpt_register_buffer.
 2048          * We keep it here, just in case the kernel decides to reallocate pages
 2049          */
 2050         if (dpt_scatter_gather(dpt, ccb, DPT_RW_BUFFER_SIZE,
 2051                                dpt->rw_buffer[bus][target][lun])) {
 2052                 printf("dpt%d: Failed to setup Scatter/Gather for "
 2053                        "Target-Mode buffer\n", dpt->unit);
 2054         }
 2055 }
 2056 
 2057 /* Setup a target mode READ command */
 2058 
 2059 static void
 2060 dpt_set_target(int redo, dpt_softc_t * dpt,
 2061                u_int8_t bus, u_int8_t target, u_int8_t lun, int mode,
 2062                u_int16_t length, u_int16_t offset, dpt_ccb_t * ccb)
 2063 {
 2064         int ospl;
 2065 
 2066         if (dpt->target_mode_enabled) {
 2067                 ospl = splcam();
 2068 
 2069                 if (!redo)
 2070                         dpt_target_ccb(dpt, bus, target, lun, ccb, mode,
 2071                                        SCSI_TM_READ_BUFFER, length, offset);
 2072 
 2073                 ccb->transaction_id = ++dpt->commands_processed;
 2074 
 2075 #ifdef DPT_MEASURE_PERFORMANCE
 2076                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
 2077                 ccb->command_started = microtime_now;
 2078 #endif
 2079                 dpt_Qadd_waiting(dpt, ccb);
 2080                 dpt_sched_queue(dpt);
 2081 
 2082                 splx(ospl);
 2083         } else {
 2084                 printf("dpt%d:  Target Mode Request, but Target Mode is OFF\n",
 2085                        dpt->unit);
 2086         }
 2087 }
 2088 
 2089 /*
 2090  * Schedule a buffer to be sent to another target.
 2091  * The work will be scheduled and the callback provided will be called when
 2092  * the work is actually done.
 2093  *
 2094  * Please NOTE:  ``Anyone'' can send a buffer, but only registered clients
 2095  * get notified of receipt of buffers.
 2096  */
 2097 
 2098 int
 2099 dpt_send_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
 2100                 u_int8_t mode, u_int16_t length, u_int16_t offset, void *data,
 2101                 buff_wr_done callback)
 2102 {
 2103         dpt_softc_t    *dpt;
 2104         dpt_ccb_t      *ccb = NULL;
 2105         int             ospl;
 2106 
 2107         /* This is an external call.  Be a bit paranoid */
 2108         for (dpt = TAILQ_FIRST(&dpt_softc_list);
 2109              dpt != NULL;
 2110              dpt = TAILQ_NEXT(dpt, links)) {
 2111                 if (dpt->unit == unit)
 2112                         goto valid_unit;
 2113         }
 2114 
 2115         return (INVALID_UNIT);
 2116 
 2117 valid_unit:
 2118 
 2119         if (dpt->target_mode_enabled) {
 2120                 if ((channel >= dpt->channels) || (target > dpt->max_id) ||
 2121                     (lun > dpt->max_lun)) {
 2122                         return (INVALID_SENDER);
 2123                 }
 2124                 if ((dpt->rw_buffer[channel][target][lun] == NULL) ||
 2125                     (dpt->buffer_receiver[channel][target][lun] == NULL))
 2126                         return (NOT_REGISTERED);
 2127 
 2128                 ospl = splsoftcam();
 2129                 /* Process the free list */
 2130                 if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
 2131                         printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
 2132                                "             Please try later\n",
 2133                                dpt->unit);
 2134                         splx(ospl);
 2135                         return (NO_RESOURCES);
 2136                 }
 2137                 /* Now grab the newest CCB */
 2138                 if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
 2139                         splx(ospl);
 2140                         panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
 2141                 }
 2142                 splx(ospl);
 2143 
 2144                 bcopy(dpt->rw_buffer[channel][target][lun] + offset, data, length);
 2145                 dpt_target_ccb(dpt, channel, target, lun, ccb, mode, 
 2146                                            SCSI_TM_WRITE_BUFFER,
 2147                                            length, offset);
 2148                 ccb->std_callback = (ccb_callback) callback; /* Potential trouble */
 2149 
 2150                 ospl = splcam();
 2151                 ccb->transaction_id = ++dpt->commands_processed;
 2152 
 2153 #ifdef DPT_MEASURE_PERFORMANCE
 2154                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
 2155                 ccb->command_started = microtime_now;
 2156 #endif
 2157                 dpt_Qadd_waiting(dpt, ccb);
 2158                 dpt_sched_queue(dpt);
 2159 
 2160                 splx(ospl);
 2161                 return (0);
 2162         }
 2163         return (DRIVER_DOWN);
 2164 }
 2165 
 2166 static void
 2167 dpt_target_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
 2168 {
 2169         int             ospl;
 2170         eata_ccb_t     *cp;
 2171 
 2172         cp = &ccb->eata_ccb;
 2173 
 2174         /*
 2175          * Remove the CCB from the waiting queue.
 2176          *  We do NOT put it back on the free, etc., queues as it is a special
 2177          * ccb, owned by the dpt_softc of this unit.
 2178          */
 2179         ospl = splsoftcam();
 2180         dpt_Qremove_completed(dpt, ccb);
 2181         splx(ospl);
 2182 
 2183 #define br_channel           (ccb->eata_ccb.cp_channel)
 2184 #define br_target            (ccb->eata_ccb.cp_id)
 2185 #define br_lun               (ccb->eata_ccb.cp_LUN)
 2186 #define br_index             [br_channel][br_target][br_lun]
 2187 #define read_buffer_callback (dpt->buffer_receiver br_index )
 2188 #define read_buffer          (dpt->rw_buffer[br_channel][br_target][br_lun])
 2189 #define cb(offset)           (ccb->eata_ccb.cp_cdb[offset])
 2190 #define br_offset            ((cb(3) << 16) | (cb(4) << 8) | cb(5))
 2191 #define br_length            ((cb(6) << 16) | (cb(7) << 8) | cb(8))
 2192 
 2193         /* Different reasons for being here, you know... */
 2194         switch (ccb->eata_ccb.cp_scsi_cmd) {
 2195         case SCSI_TM_READ_BUFFER:
 2196                 if (read_buffer_callback != NULL) {
 2197                         /* This is a buffer generated by a kernel process */
 2198                         read_buffer_callback(dpt->unit, br_channel,
 2199                                              br_target, br_lun,
 2200                                              read_buffer,
 2201                                              br_offset, br_length);
 2202                 } else {
 2203                         /*
 2204                          * This is a buffer waited for by a user (sleeping)
 2205                          * command
 2206                          */
 2207                         wakeup(ccb);
 2208                 }
 2209 
 2210                 /* We ALWAYS re-issue the same command; args are don't-care  */
 2211                 dpt_set_target(1, 0, 0, 0, 0, 0, 0, 0, 0);
 2212                 break;
 2213 
 2214         case SCSI_TM_WRITE_BUFFER:
 2215                 (ccb->wrbuff_callback) (dpt->unit, br_channel, br_target,
 2216                                         br_offset, br_length,
 2217                                         br_lun, ccb->status_packet.hba_stat);
 2218                 break;
 2219         default:
 2220                 printf("dpt%d:  %s is an unsupported command for target mode\n",
 2221                        dpt->unit, scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd));
 2222         }
 2223         ospl = splsoftcam();
 2224         dpt->target_ccb[br_channel][br_target][br_lun] = NULL;
 2225         dpt_Qpush_free(dpt, ccb);
 2226         splx(ospl);
 2227 }
 2228 
 2229 
 2230 /*
 2231  * Use this function to register a client for a buffer read target operation.
 2232  * The function you register will be called every time a buffer is received
 2233  * by the target mode code.
 2234  */
 2235 dpt_rb_t
 2236 dpt_register_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
 2237                     u_int8_t mode, u_int16_t length, u_int16_t offset,
 2238                     dpt_rec_buff callback, dpt_rb_op_t op)
 2239 {
 2240         dpt_softc_t    *dpt;
 2241         dpt_ccb_t      *ccb = NULL;
 2242         int             ospl;
 2243 
 2244         for (dpt = TAILQ_FIRST(&dpt_softc_list);
 2245              dpt != NULL;
 2246              dpt = TAILQ_NEXT(dpt, links)) {
 2247                 if (dpt->unit == unit)
 2248                         goto valid_unit;
 2249         }
 2250 
 2251         return (INVALID_UNIT);
 2252 
 2253 valid_unit:
 2254 
 2255         if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
 2256                 return (DRIVER_DOWN);
 2257 
 2258         if ((channel > (dpt->channels - 1)) || (target > (dpt->max_id - 1)) ||
 2259             (lun > (dpt->max_lun - 1)))
 2260                 return (INVALID_SENDER);
 2261 
 2262         if (dpt->buffer_receiver[channel][target][lun] == NULL) {
 2263                 if (op == REGISTER_BUFFER) {
 2264                         /* Assign the requested callback */
 2265                         dpt->buffer_receiver[channel][target][lun] = callback;
 2266                         /* Get a CCB */
 2267                         ospl = splsoftcam();
 2268 
 2269                         /* Process the free list */
 2270                         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
 2271                                 printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
 2272                                        "             Please try later\n",
 2273                                        dpt->unit);
 2274                                 splx(ospl);
 2275                                 return (NO_RESOURCES);
 2276                         }
 2277                         /* Now grab the newest CCB */
 2278                         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
 2279                                 splx(ospl);
 2280                                 panic("dpt%d: Got a NULL CCB from pop_free()\n",
 2281                                       dpt->unit);
 2282                         }
 2283                         splx(ospl);
 2284 
 2285                         /* Clean up the leftover of the previous tenant */
 2286                         ccb->status = DPT_CCB_STATE_NEW;
 2287                         dpt->target_ccb[channel][target][lun] = ccb;
 2288 
 2289                         dpt->rw_buffer[channel][target][lun] =
 2290                                 malloc(DPT_RW_BUFFER_SIZE, M_DEVBUF, M_NOWAIT);
 2291                         if (dpt->rw_buffer[channel][target][lun] == NULL) {
 2292                                 printf("dpt%d: Failed to allocate "
 2293                                        "Target-Mode buffer\n", dpt->unit);
 2294                                 ospl = splsoftcam();
 2295                                 dpt_Qpush_free(dpt, ccb);
 2296                                 splx(ospl);
 2297                                 return (NO_RESOURCES);
 2298                         }
 2299                         dpt_set_target(0, dpt, channel, target, lun, mode,
 2300                                        length, offset, ccb);
 2301                         return (SUCCESSFULLY_REGISTERED);
 2302                 } else
 2303                         return (NOT_REGISTERED);
 2304         } else {
 2305                 if (op == REGISTER_BUFFER) {
 2306                         if (dpt->buffer_receiver[channel][target][lun] == callback)
 2307                                 return (ALREADY_REGISTERED);
 2308                         else
 2309                                 return (REGISTERED_TO_ANOTHER);
 2310                 } else {
 2311                         if (dpt->buffer_receiver[channel][target][lun] == callback) {
 2312                                 dpt->buffer_receiver[channel][target][lun] = NULL;
 2313                                 ospl = splsoftcam();
 2314                                 dpt_Qpush_free(dpt, ccb);
 2315                                 splx(ospl);
 2316                                 free(dpt->rw_buffer[channel][target][lun], M_DEVBUF);
 2317                                 return (SUCCESSFULLY_REGISTERED);
 2318                         } else
 2319                                 return (INVALID_CALLBACK);
 2320                 }
 2321 
 2322         }
 2323 }
 2324 
 2325 /* Return the state of the blinking DPT LED's */
 2326 u_int8_t
 2327 dpt_blinking_led(dpt_softc_t * dpt)
 2328 {
 2329         int             ndx;
 2330         int             ospl;
 2331         u_int32_t       state;
 2332         u_int32_t       previous;
 2333         u_int8_t        result;
 2334 
 2335         ospl = splcam();
 2336 
 2337         result = 0;
 2338 
 2339         for (ndx = 0, state = 0, previous = 0;
 2340              (ndx < 10) && (state != previous);
 2341              ndx++) {
 2342                 previous = state;
 2343                 state = dpt_inl(dpt, 1);
 2344         }
 2345 
 2346         if ((state == previous) && (state == DPT_BLINK_INDICATOR))
 2347                 result = dpt_inb(dpt, 5);
 2348 
 2349         splx(ospl);
 2350         return (result);
 2351 }
 2352 
 2353 /*
 2354  * Execute a command which did not come from the kernel's SCSI layer.
 2355  * The only way to map user commands to bus and target is to comply with the
 2356  * standard DPT wire-down scheme:
 2357  */
 2358 int
 2359 dpt_user_cmd(dpt_softc_t * dpt, eata_pt_t * user_cmd,
 2360              caddr_t cmdarg, int minor_no)
 2361 {
 2362         dpt_ccb_t *ccb;
 2363         void      *data;
 2364         int        channel, target, lun;
 2365         int        huh;
 2366         int        result;
 2367         int        ospl;
 2368         int        submitted;
 2369 
 2370         data = NULL;
 2371         channel = minor2hba(minor_no);
 2372         target = minor2target(minor_no);
 2373         lun = minor2lun(minor_no);
 2374 
 2375         if ((channel > (dpt->channels - 1))
 2376          || (target > dpt->max_id)
 2377          || (lun > dpt->max_lun))
 2378                 return (ENXIO);
 2379 
 2380         if (target == dpt->sc_scsi_link[channel].adapter_targ) {
 2381                 /* This one is for the controller itself */
 2382                 if ((user_cmd->eataID[0] != 'E')
 2383                  || (user_cmd->eataID[1] != 'A')
 2384                  || (user_cmd->eataID[2] != 'T')
 2385                  || (user_cmd->eataID[3] != 'A')) {
 2386                         return (ENXIO);
 2387                 }
 2388         }
 2389         /* Get a DPT CCB, so we can prepare a command */
 2390         ospl = splsoftcam();
 2391 
 2392         /* Process the free list */
 2393         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
 2394                 printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
 2395                        "             Please try later\n",
 2396                        dpt->unit);
 2397                 splx(ospl);
 2398                 return (EFAULT);
 2399         }
 2400         /* Now grab the newest CCB */
 2401         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
 2402                 splx(ospl);
 2403                 panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
 2404         } else {
 2405                 splx(ospl);
 2406                 /* Clean up the leftover of the previous tenant */
 2407                 ccb->status = DPT_CCB_STATE_NEW;
 2408         }
 2409 
 2410         bcopy((caddr_t) & user_cmd->command_packet, (caddr_t) & ccb->eata_ccb,
 2411               sizeof(eata_ccb_t));
 2412 
 2413         /* We do not want to do user specified scatter/gather.  Why?? */
 2414         if (ccb->eata_ccb.scatter == 1)
 2415                 return (EINVAL);
 2416 
 2417         ccb->eata_ccb.Auto_Req_Sen = 1;
 2418         ccb->eata_ccb.reqlen = htonl(sizeof(struct scsi_sense_data));
 2419         ccb->eata_ccb.cp_datalen = htonl(sizeof(ccb->eata_ccb.cp_datalen));
 2420         ccb->eata_ccb.cp_dataDMA = htonl(vtophys(ccb->eata_ccb.cp_dataDMA));
 2421         ccb->eata_ccb.cp_statDMA = htonl(vtophys(&ccb->eata_ccb.cp_statDMA));
 2422         ccb->eata_ccb.cp_reqDMA = htonl(vtophys(&ccb->eata_ccb.cp_reqDMA));
 2423         ccb->eata_ccb.cp_viraddr = (u_int32_t) & ccb;
 2424 
 2425         if (ccb->eata_ccb.DataIn || ccb->eata_ccb.DataOut) {
 2426                 /* Data I/O is involved in this command.  Alocate buffer */
 2427                 if (ccb->eata_ccb.cp_datalen > PAGE_SIZE) {
 2428                         data = contigmalloc(ccb->eata_ccb.cp_datalen,
 2429                                             M_TEMP, M_WAITOK, 0, ~0,
 2430                                             ccb->eata_ccb.cp_datalen,
 2431                                             0x10000);
 2432                 } else {
 2433                         data = malloc(ccb->eata_ccb.cp_datalen, M_TEMP,
 2434                                       M_WAITOK);
 2435                 }
 2436 
 2437                 if (data == NULL) {
 2438                         printf("dpt%d: Cannot allocate %d bytes "
 2439                                "for EATA command\n", dpt->unit,
 2440                                ccb->eata_ccb.cp_datalen);
 2441                         return (EFAULT);
 2442                 }
 2443 #define usr_cmd_DMA (caddr_t)user_cmd->command_packet.cp_dataDMA
 2444                 if (ccb->eata_ccb.DataIn == 1) {
 2445                         if (copyin(usr_cmd_DMA,
 2446                                    data, ccb->eata_ccb.cp_datalen) == -1)
 2447                                 return (EFAULT);
 2448                 }
 2449         } else {
 2450                 /* No data I/O involved here.  Make sure the DPT knows that */
 2451                 ccb->eata_ccb.cp_datalen = 0;
 2452                 data = NULL;
 2453         }
 2454 
 2455         if (ccb->eata_ccb.FWNEST == 1)
 2456                 ccb->eata_ccb.FWNEST = 0;
 2457 
 2458         if (ccb->eata_ccb.cp_datalen != 0) {
 2459                 if (dpt_scatter_gather(dpt, ccb, ccb->eata_ccb.cp_datalen,
 2460                                        data) != 0) {
 2461                         if (data != NULL)
 2462                                 free(data, M_TEMP);
 2463                         return (EFAULT);
 2464                 }
 2465         }
 2466         /**
 2467          * We are required to quiet a SCSI bus.
 2468          * since we do not queue comands on a bus basis,
 2469          * we wait for ALL commands on a controller to complete.
 2470          * In the mean time, sched_queue() will not schedule new commands.
 2471          */
 2472         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
 2473             && (ccb->eata_ccb.cp_cdb[2] == BUS_QUIET)) {
 2474                 /* We wait for ALL traffic for this HBa to subside */
 2475                 ospl = splsoftcam();
 2476                 dpt->state |= DPT_HA_QUIET;
 2477                 splx(ospl);
 2478 
 2479                 while ((submitted = dpt->submitted_ccbs_count) != 0) {
 2480                         huh = tsleep((void *) dpt, PCATCH | PRIBIO, "dptqt",
 2481                                      100 * hz);
 2482                         switch (huh) {
 2483                         case 0:
 2484                                 /* Wakeup call received */
 2485                                 break;
 2486                         case EWOULDBLOCK:
 2487                                 /* Timer Expired */
 2488                                 break;
 2489                         default:
 2490                                 /* anything else */
 2491                                 break;
 2492                         }
 2493                 }
 2494         }
 2495         /* Resume normal operation */
 2496         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
 2497             && (ccb->eata_ccb.cp_cdb[2] == BUS_UNQUIET)) {
 2498                 ospl = splsoftcam();
 2499                 dpt->state &= ~DPT_HA_QUIET;
 2500                 splx(ospl);
 2501         }
 2502         /**
 2503          * Schedule the command and submit it.
 2504          * We bypass dpt_sched_queue, as it will block on DPT_HA_QUIET
 2505          */
 2506         ccb->xs = NULL;
 2507         ccb->flags = 0;
 2508         ccb->eata_ccb.Auto_Req_Sen = 1; /* We always want this feature */
 2509 
 2510         ccb->transaction_id = ++dpt->commands_processed;
 2511         ccb->std_callback = (ccb_callback) dpt_user_cmd_done;
 2512         ccb->result = (u_int32_t) & cmdarg;
 2513         ccb->data = data;
 2514 
 2515 #ifdef DPT_MEASURE_PERFORMANCE
 2516         ++dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd];
 2517         ccb->command_started = microtime_now;
 2518 #endif
 2519         ospl = splcam();
 2520         dpt_Qadd_waiting(dpt, ccb);
 2521         splx(ospl);
 2522 
 2523         dpt_sched_queue(dpt);
 2524 
 2525         /* Wait for the command to complete */
 2526         (void) tsleep((void *) ccb, PCATCH | PRIBIO, "dptucw", 100 * hz);
 2527 
 2528         /* Free allocated memory */
 2529         if (data != NULL)
 2530                 free(data, M_TEMP);
 2531 
 2532         return (0);
 2533 }
 2534 
 2535 static void
 2536 dpt_user_cmd_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
 2537 {
 2538         int             ospl = splsoftcam();
 2539         u_int32_t       result;
 2540         caddr_t         cmd_arg;
 2541 
 2542         /**
 2543          * If Auto Request Sense is on, copyout the sense struct
 2544          */
 2545 #define usr_pckt_DMA    (caddr_t)(intptr_t)ntohl(ccb->eata_ccb.cp_reqDMA)
 2546 #define usr_pckt_len    ntohl(ccb->eata_ccb.cp_datalen)
 2547         if (ccb->eata_ccb.Auto_Req_Sen == 1) {
 2548                 if (copyout((caddr_t) & ccb->sense_data, usr_pckt_DMA,
 2549                             sizeof(struct scsi_sense_data))) {
 2550                         ccb->result = EFAULT;
 2551                         dpt_Qpush_free(dpt, ccb);
 2552                         splx(ospl);
 2553                         wakeup(ccb);
 2554                         return;
 2555                 }
 2556         }
 2557         /* If DataIn is on, copyout the data */
 2558         if ((ccb->eata_ccb.DataIn == 1)
 2559             && (ccb->status_packet.hba_stat == HA_NO_ERROR)) {
 2560                 if (copyout(ccb->data, usr_pckt_DMA, usr_pckt_len)) {
 2561                         dpt_Qpush_free(dpt, ccb);
 2562                         ccb->result = EFAULT;
 2563 
 2564                         splx(ospl);
 2565                         wakeup(ccb);
 2566                         return;
 2567                 }
 2568         }
 2569         /* Copyout the status */
 2570         result = ccb->status_packet.hba_stat;
 2571         cmd_arg = (caddr_t) ccb->result;
 2572 
 2573         if (copyout((caddr_t) & result, cmd_arg, sizeof(result))) {
 2574                 dpt_Qpush_free(dpt, ccb);
 2575                 ccb->result = EFAULT;
 2576                 splx(ospl);
 2577                 wakeup(ccb);
 2578                 return;
 2579         }
 2580         /* Put the CCB back in the freelist */
 2581         ccb->state |= DPT_CCB_STATE_COMPLETED;
 2582         dpt_Qpush_free(dpt, ccb);
 2583 
 2584         /* Free allocated memory */
 2585         splx(ospl);
 2586         return;
 2587 }
 2588 
 2589 #ifdef DPT_HANDLE_TIMEOUTS
 2590 /**
 2591  * This function walks down the SUBMITTED queue.
 2592  * Every request that is too old gets aborted and marked.
 2593  * Since the DPT will complete (interrupt) immediately (what does that mean?),
 2594  * We just walk the list, aborting old commands and marking them as such.
 2595  * The dpt_complete function will get rid of the that were interrupted in the
 2596  * normal manner.
 2597  *
 2598  * This function needs to run at splcam(), as it interacts with the submitted
 2599  * queue, as well as the completed and free queues.  Just like dpt_intr() does.
 2600  * To run it at any ISPL other than that of dpt_intr(), will mean that dpt_intr
 2601  * willbe able to pre-empt it, grab a transaction in progress (towards
 2602  * destruction) and operate on it.  The state of this transaction will be not
 2603  * very clear.
 2604  * The only other option, is to lock it only as long as necessary but have
 2605  * dpt_intr() spin-wait on it. In a UP environment this makes no sense and in
 2606  * a SMP environment, the advantage is dubvious for a function that runs once
 2607  * every ten seconds for few microseconds and, on systems with healthy
 2608  * hardware, does not do anything anyway.
 2609  */
 2610 
 2611 static void
 2612 dpt_handle_timeouts(dpt_softc_t * dpt)
 2613 {
 2614         dpt_ccb_t      *ccb;
 2615         int             ospl;
 2616 
 2617         ospl = splcam();
 2618 
 2619         if (dpt->state & DPT_HA_TIMEOUTS_ACTIVE) {
 2620                 printf("dpt%d WARNING: Timeout Handling Collision\n",
 2621                        dpt->unit);
 2622                 splx(ospl);
 2623                 return;
 2624         }
 2625         dpt->state |= DPT_HA_TIMEOUTS_ACTIVE;
 2626 
 2627         /* Loop through the entire submitted queue, looking for lost souls */
 2628         for (ccb = TAILQ_FIRST(&dpt->submitted_ccbs);
 2629              ccb != NULL;
 2630              ccb = TAILQ_NEXT(ccb, links)) {
 2631                 struct scsi_xfer *xs;
 2632                 u_int32_t       age, max_age;
 2633 
 2634                 xs = ccb->xs;
 2635                 age = dpt_time_delta(ccb->command_started, microtime_now);
 2636 
 2637 #define TenSec  10000000
 2638 
 2639                 if (xs == NULL) {       /* Local, non-kernel call */
 2640                         max_age = TenSec;
 2641                 } else {
 2642                         max_age = (((xs->timeout * (dpt->submitted_ccbs_count
 2643                                                     + DPT_TIMEOUT_FACTOR))
 2644                                     > TenSec)
 2645                                  ? (xs->timeout * (dpt->submitted_ccbs_count
 2646                                                    + DPT_TIMEOUT_FACTOR))
 2647                                    : TenSec);
 2648                 }
 2649 
 2650                 /*
 2651                  * If a transaction is marked lost and is TWICE as old as we
 2652                  * care, then, and only then do we destroy it!
 2653                  */
 2654                 if (ccb->state & DPT_CCB_STATE_MARKED_LOST) {
 2655                         /* Remember who is next */
 2656                         if (age > (max_age * 2)) {
 2657                                 dpt_Qremove_submitted(dpt, ccb);
 2658                                 ccb->state &= ~DPT_CCB_STATE_MARKED_LOST;
 2659                                 ccb->state |= DPT_CCB_STATE_ABORTED;
 2660 #define cmd_name scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd)
 2661                                 if (ccb->retries++ > DPT_RETRIES) {
 2662                                         printf("dpt%d ERROR: Destroying stale "
 2663                                                "%d (%s)\n"
 2664                                                "                on "
 2665                                                "c%db%dt%du%d (%d/%d)\n",
 2666                                              dpt->unit, ccb->transaction_id,
 2667                                                cmd_name,
 2668                                                dpt->unit,
 2669                                                ccb->eata_ccb.cp_channel,
 2670                                                ccb->eata_ccb.cp_id,
 2671                                                ccb->eata_ccb.cp_LUN, age,
 2672                                                ccb->retries);
 2673 #define send_ccb &ccb->eata_ccb
 2674 #define ESA      EATA_SPECIFIC_ABORT
 2675                                         (void) dpt_send_immediate(dpt,
 2676                                                                   send_ccb,
 2677                                                                   ESA,
 2678                                                                   0, 0);
 2679                                         dpt_Qpush_free(dpt, ccb);
 2680 
 2681                                         /* The SCSI layer should re-try */
 2682                                         xs->error |= XS_TIMEOUT;
 2683                                         xs->flags |= SCSI_ITSDONE;
 2684                                         scsi_done(xs);
 2685                                 } else {
 2686                                         printf("dpt%d ERROR: Stale %d (%s) on "
 2687                                                "c%db%dt%du%d (%d)\n"
 2688                                              "          gets another "
 2689                                                "chance(%d/%d)\n",
 2690                                              dpt->unit, ccb->transaction_id,
 2691                                                cmd_name,
 2692                                                dpt->unit,
 2693                                                ccb->eata_ccb.cp_channel,
 2694                                                ccb->eata_ccb.cp_id,
 2695                                                ccb->eata_ccb.cp_LUN,
 2696                                             age, ccb->retries, DPT_RETRIES);
 2697 
 2698                                         dpt_Qpush_waiting(dpt, ccb);
 2699                                         dpt_sched_queue(dpt);
 2700                                 }
 2701                         }
 2702                 } else {
 2703                         /*
 2704                          * This is a transaction that is not to be destroyed
 2705                          * (yet) But it is too old for our liking. We wait as
 2706                          * long as the upper layer thinks. Not really, we
 2707                          * multiply that by the number of commands in the
 2708                          * submitted queue + 1.
 2709                          */
 2710                         if (!(ccb->state & DPT_CCB_STATE_MARKED_LOST) &&
 2711                             (age != ~0) && (age > max_age)) {
 2712                                 printf("dpt%d ERROR: Marking %d (%s) on "
 2713                                        "c%db%dt%du%d \n"
 2714                                        "            as late after %dusec\n",
 2715                                        dpt->unit, ccb->transaction_id,
 2716                                        cmd_name,
 2717                                        dpt->unit, ccb->eata_ccb.cp_channel,
 2718                                        ccb->eata_ccb.cp_id,
 2719                                        ccb->eata_ccb.cp_LUN, age);
 2720                                 ccb->state |= DPT_CCB_STATE_MARKED_LOST;
 2721                         }
 2722                 }
 2723         }
 2724 
 2725         dpt->state &= ~DPT_HA_TIMEOUTS_ACTIVE;
 2726         splx(ospl);
 2727 }
 2728 
 2729 static void
 2730 dpt_timeout(void *arg)
 2731 {
 2732         dpt_softc_t    *dpt = (dpt_softc_t *) arg;
 2733 
 2734         if (!(dpt->state & DPT_HA_TIMEOUTS_ACTIVE))
 2735                 dpt_handle_timeouts(dpt);
 2736 
 2737         timeout(dpt_timeout, (caddr_t) dpt, hz * 10);
 2738 }
 2739 
 2740 #endif                          /* DPT_HANDLE_TIMEOUTS */
 2741 
 2742 #endif

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