sys/dev/raid/dpt/dpt_scsi.c

   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 /*
  31  * dpt_scsi.c: SCSI dependant code for the DPT driver
  32  *
  33  * credits:     Assisted by Mike Neuffer in the early low level DPT code
  34  *              Thanx to Mark Salyzyn of DPT for his assistance.
  35  *              Special thanx to Justin Gibbs for invaluable help in
  36  *              making this driver look and work like a FreeBSD component.
  37  *              Last but not least, many thanx to UCB and the FreeBSD
  38  *              team for creating and maintaining such a wonderful O/S.
  39  *
  40  * TODO:     * Add ISA probe code.
  41  *           * Add driver-level RAID-0. This will allow interoperability with
  42  *             NiceTry, M$-Doze, Win-Dog, Slowlaris, etc., in recognizing RAID
  43  *             arrays that span controllers (Wow!).
  44  */
  45
  46 #ident "$FreeBSD: src/sys/dev/dpt/dpt_scsi.c,v 1.28.2.3 2003/01/31 02:47:10 grog Exp $"
  47 #ident "$DragonFly: src/sys/dev/raid/dpt/dpt_scsi.c,v 1.4 2003/08/07 21:17:08 dillon Exp $"
  48
  49 #define _DPT_C_
  50
  51 #include "opt_dpt.h"
  52 #include <sys/param.h>
  53 #include <sys/systm.h>
  54 #include <sys/eventhandler.h>
  55 #include <sys/malloc.h>
  56 #include <sys/kernel.h>
  57
  58 #include <sys/bus.h>
  59
  60 #include <machine/bus_memio.h>
  61 #include <machine/bus_pio.h>
  62 #include <machine/bus.h>
  63
  64 #include <machine/clock.h>
  65
  66 #include <bus/cam/cam.h>
  67 #include <bus/cam/cam_ccb.h>
  68 #include <bus/cam/cam_sim.h>
  69 #include <bus/cam/cam_xpt_sim.h>
  70 #include <bus/cam/cam_debug.h>
  71 #include <bus/cam/scsi/scsi_all.h>
  72 #include <bus/cam/scsi/scsi_message.h>
  73
  74 #include <vm/vm.h>
  75 #include <vm/pmap.h>
  76
  77 #include "dpt.h"
  78
  79 /* dpt_isa.c, dpt_eisa.c, and dpt_pci.c need this in a central place */
  80 int dpt_controllers_present;
  81
  82 u_long  dpt_unit;       /* Next unit number to use */
  83
  84 /* The linked list of softc structures */
  85 struct dpt_softc_list dpt_softcs = TAILQ_HEAD_INITIALIZER(dpt_softcs);
  86
  87 #define microtime_now dpt_time_now()
  88
  89 #define dpt_inl(dpt, port)                              \
  90         bus_space_read_4((dpt)->tag, (dpt)->bsh, port)
  91 #define dpt_inb(dpt, port)                              \
  92         bus_space_read_1((dpt)->tag, (dpt)->bsh, port)
  93 #define dpt_outl(dpt, port, value)                      \
  94         bus_space_write_4((dpt)->tag, (dpt)->bsh, port, value)
  95 #define dpt_outb(dpt, port, value)                      \
  96         bus_space_write_1((dpt)->tag, (dpt)->bsh, port, value)
  97
  98 /*
  99  * These will have to be setup by parameters passed at boot/load time. For
 100  * perfromance reasons, we make them constants for the time being.
 101  */
 102 #define dpt_min_segs    DPT_MAX_SEGS
 103 #define dpt_max_segs    DPT_MAX_SEGS
 104
 105 /* Definitions for our use of the SIM private CCB area */
 106 #define ccb_dccb_ptr spriv_ptr0
 107 #define ccb_dpt_ptr spriv_ptr1
 108
 109 /* ================= Private Inline Function declarations ===================*/
 110 static __inline int             dpt_just_reset(dpt_softc_t * dpt);
 111 static __inline int             dpt_raid_busy(dpt_softc_t * dpt);
 112 static __inline int             dpt_pio_wait (u_int32_t, u_int, u_int, u_int);
 113 static __inline int             dpt_wait(dpt_softc_t *dpt, u_int bits,
 114                                          u_int state);
 115 static __inline struct dpt_ccb* dptgetccb(struct dpt_softc *dpt);
 116 static __inline void            dptfreeccb(struct dpt_softc *dpt,
 117                                            struct dpt_ccb *dccb);
 118 static __inline u_int32_t       dptccbvtop(struct dpt_softc *dpt,
 119                                            struct dpt_ccb *dccb);
 120
 121 static __inline int             dpt_send_immediate(dpt_softc_t *dpt,
 122                                                    eata_ccb_t *cmd_block,
 123                                                    u_int32_t cmd_busaddr,
 124                                                    u_int retries,
 125                                                    u_int ifc, u_int code,
 126                                                    u_int code2);
 127
 128 /* ==================== Private Function declarations =======================*/
 129 static void             dptmapmem(void *arg, bus_dma_segment_t *segs,
 130                                   int nseg, int error);
 131
 132 static struct sg_map_node*
 133                         dptallocsgmap(struct dpt_softc *dpt);
 134
 135 static int              dptallocccbs(dpt_softc_t *dpt);
 136
 137 static int              dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb,
 138                                      u_int32_t dccb_busaddr, u_int size,
 139                                      u_int page, u_int target, int extent);
 140 static void             dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb,
 141                                          u_int32_t dccb_busaddr,
 142                                          u_int8_t *buff);
 143
 144 static void             dpt_poll(struct cam_sim *sim);
 145
 146 static void             dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs,
 147                                       int nseg, int error);
 148
 149 static void             dpt_action(struct cam_sim *sim, union ccb *ccb);
 150
 151 static int              dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd,
 152                                               u_int32_t cmd_busaddr,
 153                                               u_int command, u_int retries,
 154                                               u_int ifc, u_int code,
 155                                               u_int code2);
 156 static void             dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb,
 157                                         union ccb *ccb, u_int hba_stat,
 158                                         u_int scsi_stat, u_int32_t resid);
 159
 160 static void             dpttimeout(void *arg);
 161 static void             dptshutdown(void *arg, int howto);
 162
 163 /* ================= Private Inline Function definitions ====================*/
 164 static __inline int
 165 dpt_just_reset(dpt_softc_t * dpt)
 166 {
 167         if ((dpt_inb(dpt, 2) == 'D')
 168          && (dpt_inb(dpt, 3) == 'P')
 169          && (dpt_inb(dpt, 4) == 'T')
 170          && (dpt_inb(dpt, 5) == 'H'))
 171                 return (1);
 172         else
 173                 return (0);
 174 }
 175
 176 static __inline int
 177 dpt_raid_busy(dpt_softc_t * dpt)
 178 {
 179         if ((dpt_inb(dpt, 0) == 'D')
 180          && (dpt_inb(dpt, 1) == 'P')
 181          && (dpt_inb(dpt, 2) == 'T'))
 182                 return (1);
 183         else
 184                 return (0);
 185 }
 186
 187 static __inline int
 188 dpt_pio_wait (u_int32_t base, u_int reg, u_int bits, u_int state)
 189 {
 190         int   i;
 191         u_int c;
 192
 193         for (i = 0; i < 20000; i++) {   /* wait 20ms for not busy */
 194                 c = inb(base + reg) & bits;
 195                 if (!(c == state))
 196                         return (0);
 197                 else
 198                         DELAY(50);
 199         }
 200         return (-1);
 201 }
 202
 203 static __inline int
 204 dpt_wait(dpt_softc_t *dpt, u_int bits, u_int state)
 205 {
 206         int   i;
 207         u_int c;
 208
 209         for (i = 0; i < 20000; i++) {   /* wait 20ms for not busy */
 210                 c = dpt_inb(dpt, HA_RSTATUS) & bits;
 211                 if (c == state)
 212                         return (0);
 213                 else
 214                         DELAY(50);
 215         }
 216         return (-1);
 217 }
 218
 219 static __inline struct dpt_ccb*
 220 dptgetccb(struct dpt_softc *dpt)
 221 {
 222         struct  dpt_ccb* dccb;
 223         int     s;
 224
 225         s = splcam();
 226         if ((dccb = SLIST_FIRST(&dpt->free_dccb_list)) != NULL) {
 227                 SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
 228                 dpt->free_dccbs--;
 229         } else if (dpt->total_dccbs < dpt->max_dccbs) {
 230                 dptallocccbs(dpt);
 231                 dccb = SLIST_FIRST(&dpt->free_dccb_list);
 232                 if (dccb == NULL)
 233                         printf("dpt%d: Can't malloc DCCB\n", dpt->unit);
 234                 else {
 235                         SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
 236                         dpt->free_dccbs--;
 237                 }
 238         }
 239         splx(s);
 240
 241         return (dccb);
 242 }
 243
 244 static __inline void
 245 dptfreeccb(struct dpt_softc *dpt, struct dpt_ccb *dccb)
 246 {
 247         int s;
 248
 249         s = splcam();
 250         if ((dccb->state & DCCB_ACTIVE) != 0)
 251                 LIST_REMOVE(&dccb->ccb->ccb_h, sim_links.le);
 252         if ((dccb->state & DCCB_RELEASE_SIMQ) != 0)
 253                 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 254         else if (dpt->resource_shortage != 0
 255          && (dccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
 256                 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 257                 dpt->resource_shortage = FALSE;
 258         }
 259         dccb->state = DCCB_FREE;
 260         SLIST_INSERT_HEAD(&dpt->free_dccb_list, dccb, links);
 261         ++dpt->free_dccbs;
 262         splx(s);
 263 }
 264
 265 static __inline u_int32_t
 266 dptccbvtop(struct dpt_softc *dpt, struct dpt_ccb *dccb)
 267 {
 268         return (dpt->dpt_ccb_busbase
 269               + (u_int32_t)((caddr_t)dccb - (caddr_t)dpt->dpt_dccbs));
 270 }
 271
 272 static __inline struct dpt_ccb *
 273 dptccbptov(struct dpt_softc *dpt, u_int32_t busaddr)
 274 {
 275         return (dpt->dpt_dccbs
 276              +  ((struct dpt_ccb *)busaddr
 277                - (struct dpt_ccb *)dpt->dpt_ccb_busbase));
 278 }
 279
 280 /*
 281  * Send a command for immediate execution by the DPT
 282  * See above function for IMPORTANT notes.
 283  */
 284 static __inline int
 285 dpt_send_immediate(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
 286                    u_int32_t cmd_busaddr, u_int retries,
 287                    u_int ifc, u_int code, u_int code2)
 288 {
 289         return (dpt_send_eata_command(dpt, cmd_block, cmd_busaddr,
 290                                       EATA_CMD_IMMEDIATE, retries, ifc,
 291                                       code, code2));
 292 }
 293
 294
 295 /* ===================== Private Function definitions =======================*/
 296 static void
 297 dptmapmem(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 298 {
 299         bus_addr_t *busaddrp;
 300
 301         busaddrp = (bus_addr_t *)arg;
 302         *busaddrp = segs->ds_addr;
 303 }
 304
 305 static struct sg_map_node *
 306 dptallocsgmap(struct dpt_softc *dpt)
 307 {
 308         struct sg_map_node *sg_map;
 309
 310         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
 311
 312         if (sg_map == NULL)
 313                 return (NULL);
 314
 315         /* Allocate S/G space for the next batch of CCBS */
 316         if (bus_dmamem_alloc(dpt->sg_dmat, (void **)&sg_map->sg_vaddr,
 317                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
 318                 free(sg_map, M_DEVBUF);
 319                 return (NULL);
 320         }
 321
 322         (void)bus_dmamap_load(dpt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
 323                               PAGE_SIZE, dptmapmem, &sg_map->sg_physaddr,
 324                               /*flags*/0);
 325
 326         SLIST_INSERT_HEAD(&dpt->sg_maps, sg_map, links);
 327
 328         return (sg_map);
 329 }
 330
 331 /*
 332  * Allocate another chunk of CCB's. Return count of entries added.
 333  * Assumed to be called at splcam().
 334  */
 335 static int
 336 dptallocccbs(dpt_softc_t *dpt)
 337 {
 338         struct dpt_ccb *next_ccb;
 339         struct sg_map_node *sg_map;
 340         bus_addr_t physaddr;
 341         dpt_sg_t *segs;
 342         int newcount;
 343         int i;
 344
 345         next_ccb = &dpt->dpt_dccbs[dpt->total_dccbs];
 346
 347         if (next_ccb == dpt->dpt_dccbs) {
 348                 /*
 349                  * First time through.  Re-use the S/G
 350                  * space we allocated for initialization
 351                  * CCBS.
 352                  */
 353                 sg_map = SLIST_FIRST(&dpt->sg_maps);
 354         } else {
 355                 sg_map = dptallocsgmap(dpt);
 356         }
 357
 358         if (sg_map == NULL)
 359                 return (0);
 360
 361         segs = sg_map->sg_vaddr;
 362         physaddr = sg_map->sg_physaddr;
 363
 364         newcount = (PAGE_SIZE / (dpt->sgsize * sizeof(dpt_sg_t)));
 365         for (i = 0; dpt->total_dccbs < dpt->max_dccbs && i < newcount; i++) {
 366                 int error;
 367
 368                 error = bus_dmamap_create(dpt->buffer_dmat, /*flags*/0,
 369                                           &next_ccb->dmamap);
 370                 if (error != 0)
 371                         break;
 372                 next_ccb->sg_list = segs;
 373                 next_ccb->sg_busaddr = htonl(physaddr);
 374                 next_ccb->eata_ccb.cp_dataDMA = htonl(physaddr);
 375                 next_ccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
 376                 next_ccb->eata_ccb.cp_reqDMA =
 377                     htonl(dptccbvtop(dpt, next_ccb)
 378                         + offsetof(struct dpt_ccb, sense_data));
 379                 next_ccb->eata_ccb.cp_busaddr = dpt->dpt_ccb_busend;
 380                 next_ccb->state = DCCB_FREE;
 381                 next_ccb->tag = dpt->total_dccbs;
 382                 SLIST_INSERT_HEAD(&dpt->free_dccb_list, next_ccb, links);
 383                 segs += dpt->sgsize;
 384                 physaddr += (dpt->sgsize * sizeof(dpt_sg_t));
 385                 dpt->dpt_ccb_busend += sizeof(*next_ccb);
 386                 next_ccb++;
 387                 dpt->total_dccbs++;
 388         }
 389         return (i);
 390 }
 391
 392 dpt_conf_t *
 393 dpt_pio_get_conf (u_int32_t base)
 394 {
 395         static dpt_conf_t *     conf;
 396         u_int16_t *             p;
 397         int                     i;
 398
 399         /*
 400          * Allocate a dpt_conf_t
 401          */
 402         if (!conf) {
 403                 conf = (dpt_conf_t *)malloc(sizeof(dpt_conf_t),
 404                                                  M_DEVBUF, M_NOWAIT);
 405         }
 406
 407         /*
 408          * If we didn't get one then we probably won't ever get one.
 409          */
 410         if (!conf) {
 411                 printf("dpt: unable to allocate dpt_conf_t\n");
 412                 return (NULL);
 413         }
 414
 415         /*
 416          * If we have one, clean it up.
 417          */
 418         bzero(conf, sizeof(dpt_conf_t));
 419
 420         /*
 421          * Reset the controller.
 422          */
 423         outb((base + HA_WCOMMAND), EATA_CMD_RESET);
 424
 425         /*
 426          * Wait for the controller to become ready.
 427          * For some reason there can be -no- delays after calling reset
 428          * before we wait on ready status.
 429          */
 430         if (dpt_pio_wait(base, HA_RSTATUS, HA_SBUSY, 0)) {
 431                 printf("dpt: timeout waiting for controller to become ready\n");
 432                 return (NULL);
 433         }
 434
 435         if (dpt_pio_wait(base, HA_RAUXSTAT, HA_ABUSY, 0)) {
 436                 printf("dpt: timetout waiting for adapter ready.\n");
 437                 return (NULL);
 438         }
 439
 440         /*
 441          * Send the PIO_READ_CONFIG command.
 442          */
 443         outb((base + HA_WCOMMAND), EATA_CMD_PIO_READ_CONFIG);
 444
 445         /*
 446          * Read the data into the struct.
 447          */
 448         p = (u_int16_t *)conf;
 449         for (i = 0; i < (sizeof(dpt_conf_t) / 2); i++) {
 450
 451                 if (dpt_pio_wait(base, HA_RSTATUS, HA_SDRQ, 0)) {
 452                         printf("dpt: timeout in data read.\n");
 453                         return (NULL);
 454                 }
 455
 456                 (*p) = inw(base + HA_RDATA);
 457                 p++;
 458         }
 459
 460         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 461                 printf("dpt: error reading configuration data.\n");
 462                 return (NULL);
 463         }
 464
 465 #define BE_EATA_SIGNATURE       0x45415441
 466 #define LE_EATA_SIGNATURE       0x41544145
 467
 468         /*
 469          * Test to see if we have a valid card.
 470          */
 471         if ((conf->signature == BE_EATA_SIGNATURE) ||
 472             (conf->signature == LE_EATA_SIGNATURE)) {
 473
 474                 while (inb(base + HA_RSTATUS) & HA_SDRQ) {
 475                         inw(base + HA_RDATA);
 476                 }
 477
 478                 return (conf);
 479         }
 480         return (NULL);
 481 }
 482
 483 /*
 484  * Read a configuration page into the supplied dpt_cont_t buffer.
 485  */
 486 static int
 487 dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
 488              u_int size, u_int page, u_int target, int extent)
 489 {
 490         eata_ccb_t *cp;
 491
 492         u_int8_t   status;
 493
 494         int        ndx;
 495         int        ospl;
 496         int        result;
 497
 498         cp = &dccb->eata_ccb;
 499         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(*dpt->sp));
 500
 501         cp->Interpret = 1;
 502         cp->DataIn = 1;
 503         cp->Auto_Req_Sen = 1;
 504         cp->reqlen = sizeof(struct scsi_sense_data);
 505
 506         cp->cp_id = target;
 507         cp->cp_LUN = 0;         /* In the EATA packet */
 508         cp->cp_lun = 0;         /* In the SCSI command */
 509
 510         cp->cp_scsi_cmd = INQUIRY;
 511         cp->cp_len = size;
 512
 513         cp->cp_extent = extent;
 514
 515         cp->cp_page = page;
 516         cp->cp_channel = 0;     /* DNC, Interpret mode is set */
 517         cp->cp_identify = 1;
 518         cp->cp_datalen = htonl(size);
 519
 520         ospl = splcam();
 521
 522         /*
 523          * This could be a simple for loop, but we suspected the compiler To
 524          * have optimized it a bit too much. Wait for the controller to
 525          * become ready
 526          */
 527         while (((status = dpt_inb(dpt, HA_RSTATUS)) != (HA_SREADY | HA_SSC)
 528              && (status != (HA_SREADY | HA_SSC | HA_SERROR))
 529              && (status != (HA_SDRDY | HA_SERROR | HA_SDRQ)))
 530             || (dpt_wait(dpt, HA_SBUSY, 0))) {
 531
 532                 /*
 533                  * RAID Drives still Spinning up? (This should only occur if
 534                  * the DPT controller is in a NON PC (PCI?) platform).
 535                  */
 536                 if (dpt_raid_busy(dpt)) {
 537                         printf("dpt%d WARNING: Get_conf() RSUS failed.\n",
 538                                dpt->unit);
 539                         splx(ospl);
 540                         return (0);
 541                 }
 542         }
 543
 544         DptStat_Reset_BUSY(dpt->sp);
 545
 546         /*
 547          * XXXX We might want to do something more clever than aborting at
 548          * this point, like resetting (rebooting) the controller and trying
 549          * again.
 550          */
 551         if ((result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
 552                                             EATA_CMD_DMA_SEND_CP,
 553                                             10000, 0, 0, 0)) != 0) {
 554                 printf("dpt%d WARNING: Get_conf() failed (%d) to send "
 555                        "EATA_CMD_DMA_READ_CONFIG\n",
 556                        dpt->unit, result);
 557                 splx(ospl);
 558                 return (0);
 559         }
 560         /* Wait for two seconds for a response.  This can be slow  */
 561         for (ndx = 0;
 562              (ndx < 20000)
 563              && !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
 564              ndx++) {
 565                 DELAY(50);
 566         }
 567
 568         /* Grab the status and clear interrupts */
 569         status = dpt_inb(dpt, HA_RSTATUS);
 570
 571         splx(ospl);
 572
 573         /*
 574          * Check the status carefully.  Return only if the
 575          * command was successful.
 576          */
 577         if (((status & HA_SERROR) == 0)
 578          && (dpt->sp->hba_stat == 0)
 579          && (dpt->sp->scsi_stat == 0)
 580          && (dpt->sp->residue_len == 0))
 581                 return (0);
 582
 583         if (dpt->sp->scsi_stat == SCSI_STATUS_CHECK_COND)
 584                 return (0);
 585
 586         return (1);
 587 }
 588
 589 /* Detect Cache parameters and size */
 590 static void
 591 dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
 592                  u_int8_t *buff)
 593 {
 594         eata_ccb_t *cp;
 595         u_int8_t   *param;
 596         int         bytes;
 597         int         result;
 598         int         ospl;
 599         int         ndx;
 600         u_int8_t    status;
 601
 602         /*
 603          * Default setting, for best perfromance..
 604          * This is what virtually all cards default to..
 605          */
 606         dpt->cache_type = DPT_CACHE_WRITEBACK;
 607         dpt->cache_size = 0;
 608
 609         cp = &dccb->eata_ccb;
 610         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(dpt->sp));
 611         bzero(buff, 512);
 612
 613         /* Setup the command structure */
 614         cp->Interpret = 1;
 615         cp->DataIn = 1;
 616         cp->Auto_Req_Sen = 1;
 617         cp->reqlen = sizeof(struct scsi_sense_data);
 618
 619         cp->cp_id = 0;          /* who cares?  The HBA will interpret.. */
 620         cp->cp_LUN = 0;         /* In the EATA packet */
 621         cp->cp_lun = 0;         /* In the SCSI command */
 622         cp->cp_channel = 0;
 623
 624         cp->cp_scsi_cmd = EATA_CMD_DMA_SEND_CP;
 625         cp->cp_len = 56;
 626
 627         cp->cp_extent = 0;
 628         cp->cp_page = 0;
 629         cp->cp_identify = 1;
 630         cp->cp_dispri = 1;
 631
 632         /*
 633          * Build the EATA Command Packet structure
 634          * for a Log Sense Command.
 635          */
 636         cp->cp_cdb[0] = 0x4d;
 637         cp->cp_cdb[1] = 0x0;
 638         cp->cp_cdb[2] = 0x40 | 0x33;
 639         cp->cp_cdb[7] = 1;
 640
 641         cp->cp_datalen = htonl(512);
 642
 643         ospl = splcam();
 644         result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
 645                                        EATA_CMD_DMA_SEND_CP,
 646                                        10000, 0, 0, 0);
 647         if (result != 0) {
 648                 printf("dpt%d WARNING: detect_cache() failed (%d) to send "
 649                        "EATA_CMD_DMA_SEND_CP\n", dpt->unit, result);
 650                 splx(ospl);
 651                 return;
 652         }
 653         /* Wait for two seconds for a response.  This can be slow... */
 654         for (ndx = 0;
 655              (ndx < 20000) &&
 656              !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
 657              ndx++) {
 658                 DELAY(50);
 659         }
 660
 661         /* Grab the status and clear interrupts */
 662         status = dpt_inb(dpt, HA_RSTATUS);
 663         splx(ospl);
 664
 665         /*
 666          * Sanity check
 667          */
 668         if (buff[0] != 0x33) {
 669                 return;
 670         }
 671         bytes = DPT_HCP_LENGTH(buff);
 672         param = DPT_HCP_FIRST(buff);
 673
 674         if (DPT_HCP_CODE(param) != 1) {
 675                 /*
 676                  * DPT Log Page layout error
 677                  */
 678                 printf("dpt%d: NOTICE: Log Page (1) layout error\n",
 679                        dpt->unit);
 680                 return;
 681         }
 682         if (!(param[4] & 0x4)) {
 683                 dpt->cache_type = DPT_NO_CACHE;
 684                 return;
 685         }
 686         while (DPT_HCP_CODE(param) != 6) {
 687                 param = DPT_HCP_NEXT(param);
 688                 if ((param < buff)
 689                  || (param >= &buff[bytes])) {
 690                         return;
 691                 }
 692         }
 693
 694         if (param[4] & 0x2) {
 695                 /*
 696                  * Cache disabled
 697                  */
 698                 dpt->cache_type = DPT_NO_CACHE;
 699                 return;
 700         }
 701
 702         if (param[4] & 0x4) {
 703                 dpt->cache_type = DPT_CACHE_WRITETHROUGH;
 704         }
 705
 706         /* XXX This isn't correct.  This log parameter only has two bytes.... */
 707 #if 0
 708         dpt->cache_size = param[5]
 709                         | (param[6] << 8)
 710                         | (param[7] << 16)
 711                         | (param[8] << 24);
 712 #endif
 713 }
 714
 715 static void
 716 dpt_poll(struct cam_sim *sim)
 717 {
 718         dpt_intr(cam_sim_softc(sim));
 719 }
 720
 721 static void
 722 dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 723 {
 724         struct   dpt_ccb *dccb;
 725         union    ccb *ccb;
 726         struct   dpt_softc *dpt;
 727         int      s;
 728
 729         dccb = (struct dpt_ccb *)arg;
 730         ccb = dccb->ccb;
 731         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
 732
 733         if (error != 0) {
 734                 if (error != EFBIG)
 735                         printf("dpt%d: Unexepected error 0x%x returned from "
 736                                "bus_dmamap_load\n", dpt->unit, error);
 737                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 738                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 739                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 740                 }
 741                 dptfreeccb(dpt, dccb);
 742                 xpt_done(ccb);
 743                 return;
 744         }
 745
 746         if (nseg != 0) {
 747                 dpt_sg_t *sg;
 748                 bus_dma_segment_t *end_seg;
 749                 bus_dmasync_op_t op;
 750
 751                 end_seg = dm_segs + nseg;
 752
 753                 /* Copy the segments into our SG list */
 754                 sg = dccb->sg_list;
 755                 while (dm_segs < end_seg) {
 756                         sg->seg_len = htonl(dm_segs->ds_len);
 757                         sg->seg_addr = htonl(dm_segs->ds_addr);
 758                         sg++;
 759                         dm_segs++;
 760                 }
 761
 762                 if (nseg > 1) {
 763                         dccb->eata_ccb.scatter = 1;
 764                         dccb->eata_ccb.cp_dataDMA = dccb->sg_busaddr;
 765                         dccb->eata_ccb.cp_datalen =
 766                             htonl(nseg * sizeof(dpt_sg_t));
 767                 } else {
 768                         dccb->eata_ccb.cp_dataDMA = dccb->sg_list[0].seg_addr;
 769                         dccb->eata_ccb.cp_datalen = dccb->sg_list[0].seg_len;
 770                 }
 771
 772                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 773                         op = BUS_DMASYNC_PREREAD;
 774                 else
 775                         op = BUS_DMASYNC_PREWRITE;
 776
 777                 bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
 778
 779         } else {
 780                 dccb->eata_ccb.cp_dataDMA = 0;
 781                 dccb->eata_ccb.cp_datalen = 0;
 782         }
 783
 784         s = splcam();
 785
 786         /*
 787          * Last time we need to check if this CCB needs to
 788          * be aborted.
 789          */
 790         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 791                 if (nseg != 0)
 792                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
 793                 dptfreeccb(dpt, dccb);
 794                 xpt_done(ccb);
 795                 splx(s);
 796                 return;
 797         }
 798
 799         dccb->state |= DCCB_ACTIVE;
 800         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 801         LIST_INSERT_HEAD(&dpt->pending_ccb_list, &ccb->ccb_h, sim_links.le);
 802         ccb->ccb_h.timeout_ch =
 803             timeout(dpttimeout, (caddr_t)dccb,
 804                     (ccb->ccb_h.timeout * hz) / 1000);
 805         if (dpt_send_eata_command(dpt, &dccb->eata_ccb,
 806                                   dccb->eata_ccb.cp_busaddr,
 807                                   EATA_CMD_DMA_SEND_CP, 0, 0, 0, 0) != 0) {
 808                 ccb->ccb_h.status = CAM_NO_HBA; /* HBA dead or just busy?? */
 809                 if (nseg != 0)
 810                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
 811                 dptfreeccb(dpt, dccb);
 812                 xpt_done(ccb);
 813         }
 814
 815         splx(s);
 816 }
 817
 818 static void
 819 dpt_action(struct cam_sim *sim, union ccb *ccb)
 820 {
 821         struct    dpt_softc *dpt;
 822
 823         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("dpt_action\n"));
 824
 825         dpt = (struct dpt_softc *)cam_sim_softc(sim);
 826
 827         if ((dpt->state & DPT_HA_SHUTDOWN_ACTIVE) != 0) {
 828                 xpt_print_path(ccb->ccb_h.path);
 829                 printf("controller is shutdown. Aborting CCB.\n");
 830                 ccb->ccb_h.status = CAM_NO_HBA;
 831                 xpt_done(ccb);
 832                 return;
 833         }
 834
 835         switch (ccb->ccb_h.func_code) {
 836         /* Common cases first */
 837         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
 838         {
 839                 struct  ccb_scsiio *csio;
 840                 struct  ccb_hdr *ccbh;
 841                 struct  dpt_ccb *dccb;
 842                 struct  eata_ccb *eccb;
 843
 844                 csio = &ccb->csio;
 845                 ccbh = &ccb->ccb_h;
 846                 /* Max CDB length is 12 bytes */
 847                 if (csio->cdb_len > 12) {
 848                         ccb->ccb_h.status = CAM_REQ_INVALID;
 849                         xpt_done(ccb);
 850                         return;
 851                 }
 852                 if ((dccb = dptgetccb(dpt)) == NULL) {
 853                         int s;
 854
 855                         s = splcam();
 856                         dpt->resource_shortage = 1;
 857                         splx(s);
 858                         xpt_freeze_simq(sim, /*count*/1);
 859                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 860                         xpt_done(ccb);
 861                         return;
 862                 }
 863                 eccb = &dccb->eata_ccb;
 864
 865                 /* Link dccb and ccb so we can find one from the other */
 866                 dccb->ccb = ccb;
 867                 ccb->ccb_h.ccb_dccb_ptr = dccb;
 868                 ccb->ccb_h.ccb_dpt_ptr = dpt;
 869
 870                 /*
 871                  * Explicitly set all flags so that the compiler can
 872                  * be smart about setting them.
 873                  */
 874                 eccb->SCSI_Reset = 0;
 875                 eccb->HBA_Init = 0;
 876                 eccb->Auto_Req_Sen = (ccb->ccb_h.flags & CAM_DIS_AUTOSENSE)
 877                                    ? 0 : 1;
 878                 eccb->scatter = 0;
 879                 eccb->Quick = 0;
 880                 eccb->Interpret =
 881                     ccb->ccb_h.target_id == dpt->hostid[cam_sim_bus(sim)]
 882                     ? 1 : 0;
 883                 eccb->DataOut = (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
 884                 eccb->DataIn = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
 885                 eccb->reqlen = csio->sense_len;
 886                 eccb->cp_id = ccb->ccb_h.target_id;
 887                 eccb->cp_channel = cam_sim_bus(sim);
 888                 eccb->cp_LUN = ccb->ccb_h.target_lun;
 889                 eccb->cp_luntar = 0;
 890                 eccb->cp_dispri = (ccb->ccb_h.flags & CAM_DIS_DISCONNECT)
 891                                 ? 0 : 1;
 892                 eccb->cp_identify = 1;
 893
 894                 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0
 895                  && csio->tag_action != CAM_TAG_ACTION_NONE) {
 896                         eccb->cp_msg[0] = csio->tag_action;
 897                         eccb->cp_msg[1] = dccb->tag;
 898                 } else {
 899                         eccb->cp_msg[0] = 0;
 900                         eccb->cp_msg[1] = 0;
 901                 }
 902                 eccb->cp_msg[2] = 0;
 903
 904                 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
 905                         if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
 906                                 bcopy(csio->cdb_io.cdb_ptr,
 907                                       eccb->cp_cdb, csio->cdb_len);
 908                         } else {
 909                                 /* I guess I could map it in... */
 910                                 ccb->ccb_h.status = CAM_REQ_INVALID;
 911                                 dptfreeccb(dpt, dccb);
 912                                 xpt_done(ccb);
 913                                 return;
 914                         }
 915                 } else {
 916                         bcopy(csio->cdb_io.cdb_bytes,
 917                               eccb->cp_cdb, csio->cdb_len);
 918                 }
 919                 /*
 920                  * If we have any data to send with this command,
 921                  * map it into bus space.
 922                  */
 923                 /* Only use S/G if there is a transfer */
 924                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 925                         if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
 926                                 /*
 927                                  * We've been given a pointer
 928                                  * to a single buffer.
 929                                  */
 930                                 if ((ccbh->flags & CAM_DATA_PHYS) == 0) {
 931                                         int s;
 932                                         int error;
 933
 934                                         s = splsoftvm();
 935                                         error =
 936                                             bus_dmamap_load(dpt->buffer_dmat,
 937                                                             dccb->dmamap,
 938                                                             csio->data_ptr,
 939                                                             csio->dxfer_len,
 940                                                             dptexecuteccb,
 941                                                             dccb, /*flags*/0);
 942                                         if (error == EINPROGRESS) {
 943                                                 /*
 944                                                  * So as to maintain ordering,
 945                                                  * freeze the controller queue
 946                                                  * until our mapping is
 947                                                  * returned.
 948                                                  */
 949                                                 xpt_freeze_simq(sim, 1);
 950                                                 dccb->state |= CAM_RELEASE_SIMQ;
 951                                         }
 952                                         splx(s);
 953                                 } else {
 954                                         struct bus_dma_segment seg;
 955
 956                                         /* Pointer to physical buffer */
 957                                         seg.ds_addr =
 958                                             (bus_addr_t)csio->data_ptr;
 959                                         seg.ds_len = csio->dxfer_len;
 960                                         dptexecuteccb(dccb, &seg, 1, 0);
 961                                 }
 962                         } else {
 963                                 struct bus_dma_segment *segs;
 964
 965                                 if ((ccbh->flags & CAM_DATA_PHYS) != 0)
 966                                         panic("dpt_action - Physical "
 967                                               "segment pointers "
 968                                               "unsupported");
 969
 970                                 if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
 971                                         panic("dpt_action - Virtual "
 972                                               "segment addresses "
 973                                               "unsupported");
 974
 975                                 /* Just use the segments provided */
 976                                 segs = (struct bus_dma_segment *)csio->data_ptr;
 977                                 dptexecuteccb(dccb, segs, csio->sglist_cnt, 0);
 978                         }
 979                 } else {
 980                         /*
 981                          * XXX JGibbs.
 982                          * Does it want them both on or both off?
 983                          * CAM_DIR_NONE is both on, so this code can
 984                          * be removed if this is also what the DPT
 985                          * exptects.
 986                          */
 987                         eccb->DataOut = 0;
 988                         eccb->DataIn = 0;
 989                         dptexecuteccb(dccb, NULL, 0, 0);
 990                 }
 991                 break;
 992         }
 993         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
 994         case XPT_ABORT:                 /* Abort the specified CCB */
 995                 /* XXX Implement */
 996                 ccb->ccb_h.status = CAM_REQ_INVALID;
 997                 xpt_done(ccb);
 998                 break;
 999         case XPT_SET_TRAN_SETTINGS:
1000         {
1001                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1002                 xpt_done(ccb);
1003                 break;
1004         }
1005         case XPT_GET_TRAN_SETTINGS:
1006         /* Get default/user set transfer settings for the target */
1007         {
1008                 struct  ccb_trans_settings *cts;
1009                 u_int   target_mask;
1010
1011                 cts = &ccb->cts;
1012                 target_mask = 0x01 << ccb->ccb_h.target_id;
1013                 if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) {
1014                         cts->flags = CCB_TRANS_DISC_ENB|CCB_TRANS_TAG_ENB;
1015                         cts->bus_width = (dpt->max_id > 7)
1016                                        ? MSG_EXT_WDTR_BUS_8_BIT
1017                                        : MSG_EXT_WDTR_BUS_16_BIT;
1018                         cts->sync_period = 25; /* 10MHz */
1019
1020                         if (cts->sync_period != 0)
1021                                 cts->sync_offset = 15;
1022
1023                         cts->valid = CCB_TRANS_SYNC_RATE_VALID
1024                                    | CCB_TRANS_SYNC_OFFSET_VALID
1025                                    | CCB_TRANS_BUS_WIDTH_VALID
1026                                    | CCB_TRANS_DISC_VALID
1027                                    | CCB_TRANS_TQ_VALID;
1028                         ccb->ccb_h.status = CAM_REQ_CMP;
1029                 } else {
1030                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1031                 }
1032                 xpt_done(ccb);
1033                 break;
1034         }
1035         case XPT_CALC_GEOMETRY:
1036         {
1037                 struct    ccb_calc_geometry *ccg;
1038                 u_int32_t size_mb;
1039                 u_int32_t secs_per_cylinder;
1040                 int       extended;
1041
1042                 /*
1043                  * XXX Use Adaptec translation until I find out how to
1044                  *     get this information from the card.
1045                  */
1046                 ccg = &ccb->ccg;
1047                 size_mb = ccg->volume_size
1048                         / ((1024L * 1024L) / ccg->block_size);
1049                 extended = 1;
1050
1051                 if (size_mb > 1024 && extended) {
1052                         ccg->heads = 255;
1053                         ccg->secs_per_track = 63;
1054                 } else {
1055                         ccg->heads = 64;
1056                         ccg->secs_per_track = 32;
1057                 }
1058                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
1059                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
1060                 ccb->ccb_h.status = CAM_REQ_CMP;
1061                 xpt_done(ccb);
1062                 break;
1063         }
1064         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
1065         {
1066                 /* XXX Implement */
1067                 ccb->ccb_h.status = CAM_REQ_CMP;
1068                 xpt_done(ccb);
1069                 break;
1070         }
1071         case XPT_TERM_IO:               /* Terminate the I/O process */
1072                 /* XXX Implement */
1073                 ccb->ccb_h.status = CAM_REQ_INVALID;
1074                 xpt_done(ccb);
1075                 break;
1076         case XPT_PATH_INQ:              /* Path routing inquiry */
1077         {
1078                 struct ccb_pathinq *cpi = &ccb->cpi;
1079
1080                 cpi->version_num = 1;
1081                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
1082                 if (dpt->max_id > 7)
1083                         cpi->hba_inquiry |= PI_WIDE_16;
1084                 cpi->target_sprt = 0;
1085                 cpi->hba_misc = 0;
1086                 cpi->hba_eng_cnt = 0;
1087                 cpi->max_target = dpt->max_id;
1088                 cpi->max_lun = dpt->max_lun;
1089                 cpi->initiator_id = dpt->hostid[cam_sim_bus(sim)];
1090                 cpi->bus_id = cam_sim_bus(sim);
1091                 cpi->base_transfer_speed = 3300;
1092                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1093                 strncpy(cpi->hba_vid, "DPT", HBA_IDLEN);
1094                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1095                 cpi->unit_number = cam_sim_unit(sim);
1096                 cpi->ccb_h.status = CAM_REQ_CMP;
1097                 xpt_done(ccb);
1098                 break;
1099         }
1100         default:
1101                 ccb->ccb_h.status = CAM_REQ_INVALID;
1102                 xpt_done(ccb);
1103                 break;
1104         }
1105 }
1106
1107 /*
1108  * This routine will try to send an EATA command to the DPT HBA.
1109  * It will, by default, try 20,000 times, waiting 50us between tries.
1110  * It returns 0 on success and 1 on failure.
1111  * It is assumed to be called at splcam().
1112  */
1113 static int
1114 dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
1115                       u_int32_t cmd_busaddr, u_int command, u_int retries,
1116                       u_int ifc, u_int code, u_int code2)
1117 {
1118         u_int   loop;
1119
1120         if (!retries)
1121                 retries = 20000;
1122
1123         /*
1124          * I hate this polling nonsense. Wish there was a way to tell the DPT
1125          * to go get commands at its own pace,  or to interrupt when ready.
1126          * In the mean time we will measure how many itterations it really
1127          * takes.
1128          */
1129         for (loop = 0; loop < retries; loop++) {
1130                 if ((dpt_inb(dpt, HA_RAUXSTAT) & HA_ABUSY) == 0)
1131                         break;
1132                 else
1133                         DELAY(50);
1134         }
1135
1136         if (loop < retries) {
1137 #ifdef DPT_MEASURE_PERFORMANCE
1138                 if (loop > dpt->performance.max_eata_tries)
1139                         dpt->performance.max_eata_tries = loop;
1140
1141                 if (loop < dpt->performance.min_eata_tries)
1142                         dpt->performance.min_eata_tries = loop;
1143 #endif
1144         } else {
1145 #ifdef DPT_MEASURE_PERFORMANCE
1146                 ++dpt->performance.command_too_busy;
1147 #endif
1148                 return (1);
1149         }
1150
1151         /* The controller is alive, advance the wedge timer */
1152 #ifdef DPT_RESET_HBA
1153         dpt->last_contact = microtime_now;
1154 #endif
1155
1156         if (cmd_block == NULL)
1157                 cmd_busaddr = 0;
1158 #if (BYTE_ORDER == BIG_ENDIAN)
1159         else {
1160                 cmd_busaddr = ((cmd_busaddr >> 24) & 0xFF)
1161                             | ((cmd_busaddr >> 16) & 0xFF)
1162                             | ((cmd_busaddr >> 8) & 0xFF)
1163                             | (cmd_busaddr & 0xFF);
1164         }
1165 #endif
1166         /* And now the address */
1167         dpt_outl(dpt, HA_WDMAADDR, cmd_busaddr);
1168
1169         if (command == EATA_CMD_IMMEDIATE) {
1170                 if (cmd_block == NULL) {
1171                         dpt_outb(dpt, HA_WCODE2, code2);
1172                         dpt_outb(dpt, HA_WCODE, code);
1173                 }
1174                 dpt_outb(dpt, HA_WIFC, ifc);
1175         }
1176         dpt_outb(dpt, HA_WCOMMAND, command);
1177
1178         return (0);
1179 }
1180
1181
1182 /* ==================== Exported Function definitions =======================*/
1183 dpt_softc_t *
1184 dpt_alloc(device_t dev, bus_space_tag_t tag, bus_space_handle_t bsh)
1185 {
1186         dpt_softc_t     *dpt = device_get_softc(dev);
1187         int    i;
1188
1189         bzero(dpt, sizeof(dpt_softc_t));
1190         dpt->tag = tag;
1191         dpt->bsh = bsh;
1192         dpt->unit = device_get_unit(dev);
1193         SLIST_INIT(&dpt->free_dccb_list);
1194         LIST_INIT(&dpt->pending_ccb_list);
1195         TAILQ_INSERT_TAIL(&dpt_softcs, dpt, links);
1196         for (i = 0; i < MAX_CHANNELS; i++)
1197                 dpt->resetlevel[i] = DPT_HA_OK;
1198
1199 #ifdef DPT_MEASURE_PERFORMANCE
1200         dpt_reset_performance(dpt);
1201 #endif /* DPT_MEASURE_PERFORMANCE */
1202         return (dpt);
1203 }
1204
1205 void
1206 dpt_free(struct dpt_softc *dpt)
1207 {
1208         switch (dpt->init_level) {
1209         default:
1210         case 5:
1211                 bus_dmamap_unload(dpt->dccb_dmat, dpt->dccb_dmamap);
1212         case 4:
1213                 bus_dmamem_free(dpt->dccb_dmat, dpt->dpt_dccbs,
1214                                 dpt->dccb_dmamap);
1215                 bus_dmamap_destroy(dpt->dccb_dmat, dpt->dccb_dmamap);
1216         case 3:
1217                 bus_dma_tag_destroy(dpt->dccb_dmat);
1218         case 2:
1219                 bus_dma_tag_destroy(dpt->buffer_dmat);
1220         case 1:
1221         {
1222                 struct sg_map_node *sg_map;
1223
1224                 while ((sg_map = SLIST_FIRST(&dpt->sg_maps)) != NULL) {
1225                         SLIST_REMOVE_HEAD(&dpt->sg_maps, links);
1226                         bus_dmamap_unload(dpt->sg_dmat,
1227                                           sg_map->sg_dmamap);
1228                         bus_dmamem_free(dpt->sg_dmat, sg_map->sg_vaddr,
1229                                         sg_map->sg_dmamap);
1230                         free(sg_map, M_DEVBUF);
1231                 }
1232                 bus_dma_tag_destroy(dpt->sg_dmat);
1233         }
1234         case 0:
1235                 break;
1236         }
1237         TAILQ_REMOVE(&dpt_softcs, dpt, links);
1238 }
1239
1240 static u_int8_t string_sizes[] =
1241 {
1242         sizeof(((dpt_inq_t*)NULL)->vendor),
1243         sizeof(((dpt_inq_t*)NULL)->modelNum),
1244         sizeof(((dpt_inq_t*)NULL)->firmware),
1245         sizeof(((dpt_inq_t*)NULL)->protocol),
1246 };
1247
1248 int
1249 dpt_init(struct dpt_softc *dpt)
1250 {
1251         dpt_conf_t  conf;
1252         struct      sg_map_node *sg_map;
1253         dpt_ccb_t  *dccb;
1254         u_int8_t   *strp;
1255         int         index;
1256         int         i;
1257         int         retval;
1258
1259         dpt->init_level = 0;
1260         SLIST_INIT(&dpt->sg_maps);
1261
1262 #ifdef DPT_RESET_BOARD
1263         printf("dpt%d: resetting HBA\n", dpt->unit);
1264         dpt_outb(dpt, HA_WCOMMAND, EATA_CMD_RESET);
1265         DELAY(750000);
1266         /* XXX Shouldn't we poll a status register or something??? */
1267 #endif
1268         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
1269         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1270                                /*lowaddr*/BUS_SPACE_MAXADDR,
1271                                /*highaddr*/BUS_SPACE_MAXADDR,
1272                                /*filter*/NULL, /*filterarg*/NULL,
1273                                PAGE_SIZE, /*nsegments*/1,
1274                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1275                                /*flags*/0, &dpt->sg_dmat) != 0) {
1276                 goto error_exit;
1277         }
1278
1279         dpt->init_level++;
1280
1281         /*
1282          * We allocate our DPT ccbs as a contiguous array of bus dma'able
1283          * memory.  To get the allocation size, we need to know how many
1284          * ccbs the card supports.  This requires a ccb.  We solve this
1285          * chicken and egg problem by allocating some re-usable S/G space
1286          * up front, and treating it as our status packet, CCB, and target
1287          * memory space for these commands.
1288          */
1289         sg_map = dptallocsgmap(dpt);
1290         if (sg_map == NULL)
1291                 goto error_exit;
1292
1293         dpt->sp = (volatile dpt_sp_t *)sg_map->sg_vaddr;
1294         dccb = (struct dpt_ccb *)(uintptr_t)(volatile void *)&dpt->sp[1];
1295         bzero(dccb, sizeof(*dccb));
1296         dpt->sp_physaddr = sg_map->sg_physaddr;
1297         dccb->eata_ccb.cp_dataDMA =
1298             htonl(sg_map->sg_physaddr + sizeof(dpt_sp_t) + sizeof(*dccb));
1299         dccb->eata_ccb.cp_busaddr = ~0;
1300         dccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
1301         dccb->eata_ccb.cp_reqDMA = htonl(dpt->sp_physaddr + sizeof(*dccb)
1302                                        + offsetof(struct dpt_ccb, sense_data));
1303
1304         /* Okay.  Fetch our config */
1305         bzero(&dccb[1], sizeof(conf)); /* data area */
1306         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1307                               sizeof(conf), 0xc1, 7, 1);
1308
1309         if (retval != 0) {
1310                 printf("dpt%d: Failed to get board configuration\n", dpt->unit);
1311                 return (retval);
1312         }
1313         bcopy(&dccb[1], &conf, sizeof(conf));
1314
1315         bzero(&dccb[1], sizeof(dpt->board_data));
1316         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1317                               sizeof(dpt->board_data), 0, conf.scsi_id0, 0);
1318         if (retval != 0) {
1319                 printf("dpt%d: Failed to get inquiry information\n", dpt->unit);
1320                 return (retval);
1321         }
1322         bcopy(&dccb[1], &dpt->board_data, sizeof(dpt->board_data));
1323
1324         dpt_detect_cache(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1325                          (u_int8_t *)&dccb[1]);
1326
1327         switch (ntohl(conf.splen)) {
1328         case DPT_EATA_REVA:
1329                 dpt->EATA_revision = 'a';
1330                 break;
1331         case DPT_EATA_REVB:
1332                 dpt->EATA_revision = 'b';
1333                 break;
1334         case DPT_EATA_REVC:
1335                 dpt->EATA_revision = 'c';
1336                 break;
1337         case DPT_EATA_REVZ:
1338                 dpt->EATA_revision = 'z';
1339                 break;
1340         default:
1341                 dpt->EATA_revision = '?';
1342         }
1343
1344         dpt->max_id      = conf.MAX_ID;
1345         dpt->max_lun     = conf.MAX_LUN;
1346         dpt->irq         = conf.IRQ;
1347         dpt->dma_channel = (8 - conf.DMA_channel) & 7;
1348         dpt->channels    = conf.MAX_CHAN + 1;
1349         dpt->state      |= DPT_HA_OK;
1350         if (conf.SECOND)
1351                 dpt->primary = FALSE;
1352         else
1353                 dpt->primary = TRUE;
1354
1355         dpt->more_support = conf.MORE_support;
1356
1357         if (strncmp(dpt->board_data.firmware, "07G0", 4) >= 0)
1358                 dpt->immediate_support = 1;
1359         else
1360                 dpt->immediate_support = 0;
1361
1362         dpt->broken_INQUIRY = FALSE;
1363
1364         dpt->cplen = ntohl(conf.cplen);
1365         dpt->cppadlen = ntohs(conf.cppadlen);
1366         dpt->max_dccbs = ntohs(conf.queuesiz);
1367
1368         if (dpt->max_dccbs > 256) {
1369                 printf("dpt%d: Max CCBs reduced from %d to "
1370                        "256 due to tag algorithm\n", dpt->unit, dpt->max_dccbs);
1371                 dpt->max_dccbs = 256;
1372         }
1373
1374         dpt->hostid[0] = conf.scsi_id0;
1375         dpt->hostid[1] = conf.scsi_id1;
1376         dpt->hostid[2] = conf.scsi_id2;
1377
1378         if (conf.SG_64K)
1379                 dpt->sgsize = 8192;
1380         else
1381                 dpt->sgsize = ntohs(conf.SGsiz);
1382
1383         /* We can only get 64k buffers, so don't bother to waste space. */
1384         if (dpt->sgsize < 17 || dpt->sgsize > 32)
1385                 dpt->sgsize = 32;
1386
1387         if (dpt->sgsize > dpt_max_segs)
1388                 dpt->sgsize = dpt_max_segs;
1389
1390         /* DMA tag for mapping buffers into device visible space. */
1391         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1392                                /*lowaddr*/BUS_SPACE_MAXADDR,
1393                                /*highaddr*/BUS_SPACE_MAXADDR,
1394                                /*filter*/NULL, /*filterarg*/NULL,
1395                                /*maxsize*/MAXBSIZE, /*nsegments*/dpt->sgsize,
1396                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1397                                /*flags*/BUS_DMA_ALLOCNOW,
1398                                &dpt->buffer_dmat) != 0) {
1399                 printf("dpt: bus_dma_tag_create(...,dpt->buffer_dmat) failed\n");
1400                 goto error_exit;
1401         }
1402
1403         dpt->init_level++;
1404
1405         /* DMA tag for our ccb structures and interrupt status packet */
1406         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1407                                /*lowaddr*/BUS_SPACE_MAXADDR,
1408                                /*highaddr*/BUS_SPACE_MAXADDR,
1409                                /*filter*/NULL, /*filterarg*/NULL,
1410                                (dpt->max_dccbs * sizeof(struct dpt_ccb))
1411                                + sizeof(dpt_sp_t),
1412                                /*nsegments*/1,
1413                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1414                                /*flags*/0, &dpt->dccb_dmat) != 0) {
1415                 printf("dpt: bus_dma_tag_create(...,dpt->dccb_dmat) failed\n");
1416                 goto error_exit;
1417         }
1418
1419         dpt->init_level++;
1420
1421         /* Allocation for our ccbs and interrupt status packet */
1422         if (bus_dmamem_alloc(dpt->dccb_dmat, (void **)&dpt->dpt_dccbs,
1423                              BUS_DMA_NOWAIT, &dpt->dccb_dmamap) != 0) {
1424                 printf("dpt: bus_dmamem_alloc(dpt->dccb_dmat,...) failed\n");
1425                 goto error_exit;
1426         }
1427
1428         dpt->init_level++;
1429
1430         /* And permanently map them */
1431         bus_dmamap_load(dpt->dccb_dmat, dpt->dccb_dmamap,
1432                         dpt->dpt_dccbs,
1433                         (dpt->max_dccbs * sizeof(struct dpt_ccb))
1434                         + sizeof(dpt_sp_t),
1435                         dptmapmem, &dpt->dpt_ccb_busbase, /*flags*/0);
1436
1437         /* Clear them out. */
1438         bzero(dpt->dpt_dccbs,
1439               (dpt->max_dccbs * sizeof(struct dpt_ccb)) + sizeof(dpt_sp_t));
1440
1441         dpt->dpt_ccb_busend = dpt->dpt_ccb_busbase;
1442
1443         dpt->sp = (dpt_sp_t*)&dpt->dpt_dccbs[dpt->max_dccbs];
1444         dpt->sp_physaddr = dpt->dpt_ccb_busbase
1445                          + (dpt->max_dccbs * sizeof(dpt_ccb_t));
1446         dpt->init_level++;
1447
1448         /* Allocate our first batch of ccbs */
1449         if (dptallocccbs(dpt) == 0) {
1450                 printf("dpt: dptallocccbs(dpt) == 0\n");
1451                 return (2);
1452         }
1453
1454         /* Prepare for Target Mode */
1455         dpt->target_mode_enabled = 1;
1456
1457         /* Nuke excess spaces from inquiry information */
1458         strp = dpt->board_data.vendor;
1459         for (i = 0; i < sizeof(string_sizes); i++) {
1460                 index = string_sizes[i] - 1;
1461                 while (index && (strp[index] == ' '))
1462                         strp[index--] = '\0';
1463                 strp += string_sizes[i];
1464         }
1465
1466         printf("dpt%d: %.8s %.16s FW Rev. %.4s, ",
1467                dpt->unit, dpt->board_data.vendor,
1468                dpt->board_data.modelNum, dpt->board_data.firmware);
1469
1470         printf("%d channel%s, ", dpt->channels, dpt->channels > 1 ? "s" : "");
1471
1472         if (dpt->cache_type != DPT_NO_CACHE
1473          && dpt->cache_size != 0) {
1474                 printf("%s Cache, ",
1475                        dpt->cache_type == DPT_CACHE_WRITETHROUGH
1476                      ? "Write-Through" : "Write-Back");
1477         }
1478
1479         printf("%d CCBs\n", dpt->max_dccbs);
1480         return (0);
1481
1482 error_exit:
1483         return (1);
1484 }
1485
1486 int
1487 dpt_attach(dpt_softc_t *dpt)
1488 {
1489         struct cam_devq *devq;
1490         int i;
1491
1492         /*
1493          * Create the device queue for our SIM.
1494          */
1495         devq = cam_simq_alloc(dpt->max_dccbs);
1496         if (devq == NULL)
1497                 return (0);
1498
1499         for (i = 0; i < dpt->channels; i++) {
1500                 /*
1501                  * Construct our SIM entry
1502                  */
1503                 dpt->sims[i] = cam_sim_alloc(dpt_action, dpt_poll, "dpt",
1504                                              dpt, dpt->unit, /*untagged*/2,
1505                                              /*tagged*/dpt->max_dccbs, devq);
1506                 if (xpt_bus_register(dpt->sims[i], i) != CAM_SUCCESS) {
1507                         cam_sim_free(dpt->sims[i], /*free_devq*/i == 0);
1508                         break;
1509                 }
1510
1511                 if (xpt_create_path(&dpt->paths[i], /*periph*/NULL,
1512                                     cam_sim_path(dpt->sims[i]),
1513                                     CAM_TARGET_WILDCARD,
1514                                     CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
1515                         xpt_bus_deregister(cam_sim_path(dpt->sims[i]));
1516                         cam_sim_free(dpt->sims[i], /*free_devq*/i == 0);
1517                         break;
1518                 }
1519
1520         }
1521         if (i > 0)
1522                 EVENTHANDLER_REGISTER(shutdown_final, dptshutdown,
1523                                       dpt, SHUTDOWN_PRI_DEFAULT);
1524         return (i);
1525 }
1526
1527
1528 /*
1529  * This is the interrupt handler for the DPT driver.
1530  */
1531 void
1532 dpt_intr(void *arg)
1533 {
1534         dpt_softc_t    *dpt;
1535         dpt_ccb_t      *dccb;
1536         union ccb      *ccb;
1537         u_int           status;
1538         u_int           aux_status;
1539         u_int           hba_stat;
1540         u_int           scsi_stat;
1541         u_int32_t       residue_len;    /* Number of bytes not transferred */
1542
1543         dpt = (dpt_softc_t *)arg;
1544
1545         /* First order of business is to check if this interrupt is for us */
1546         while (((aux_status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ) != 0) {
1547
1548                 /*
1549                  * What we want to do now, is to capture the status, all of it,
1550                  * move it where it belongs, wake up whoever sleeps waiting to
1551                  * process this result, and get out of here.
1552                  */
1553                 if (dpt->sp->ccb_busaddr < dpt->dpt_ccb_busbase
1554                  || dpt->sp->ccb_busaddr >= dpt->dpt_ccb_busend) {
1555                         printf("Encountered bogus status packet\n");
1556                         status = dpt_inb(dpt, HA_RSTATUS);
1557                         return;
1558                 }
1559
1560                 dccb = dptccbptov(dpt, dpt->sp->ccb_busaddr);
1561
1562                 dpt->sp->ccb_busaddr = ~0;
1563
1564                 /* Ignore status packets with EOC not set */
1565                 if (dpt->sp->EOC == 0) {
1566                         printf("dpt%d ERROR: Request %d received with "
1567                                "clear EOC.\n     Marking as LOST.\n",
1568                                dpt->unit, dccb->transaction_id);
1569
1570 #ifdef DPT_HANDLE_TIMEOUTS
1571                         dccb->state |= DPT_CCB_STATE_MARKED_LOST;
1572 #endif
1573                         /* This CLEARS the interrupt! */
1574                         status = dpt_inb(dpt, HA_RSTATUS);
1575                         continue;
1576                 }
1577                 dpt->sp->EOC = 0;
1578
1579                 /*
1580                  * Double buffer the status information so the hardware can
1581                  * work on updating the status packet while we decifer the
1582                  * one we were just interrupted for.
1583                  * According to Mark Salyzyn, we only need few pieces of it.
1584                  */
1585                 hba_stat = dpt->sp->hba_stat;
1586                 scsi_stat = dpt->sp->scsi_stat;
1587                 residue_len = dpt->sp->residue_len;
1588
1589                 /* Clear interrupts, check for error */
1590                 if ((status = dpt_inb(dpt, HA_RSTATUS)) & HA_SERROR) {
1591                         /*
1592                          * Error Condition. Check for magic cookie. Exit
1593                          * this test on earliest sign of non-reset condition
1594                          */
1595
1596                         /* Check that this is not a board reset interrupt */
1597                         if (dpt_just_reset(dpt)) {
1598                                 printf("dpt%d: HBA rebooted.\n"
1599                                        "      All transactions should be "
1600                                        "resubmitted\n",
1601                                        dpt->unit);
1602
1603                                 printf("dpt%d: >>---->>  This is incomplete, "
1604                                        "fix me....  <<----<<", dpt->unit);
1605                                 panic("DPT Rebooted");
1606
1607                         }
1608                 }
1609                 /* Process CCB */
1610                 ccb = dccb->ccb;
1611                 untimeout(dpttimeout, dccb, ccb->ccb_h.timeout_ch);
1612                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1613                         bus_dmasync_op_t op;
1614
1615                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1616                                 op = BUS_DMASYNC_POSTREAD;
1617                         else
1618                                 op = BUS_DMASYNC_POSTWRITE;
1619                         bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
1620                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
1621                 }
1622
1623                 /* Common Case inline... */
1624                 if (hba_stat == HA_NO_ERROR) {
1625                         ccb->csio.scsi_status = scsi_stat;
1626                         ccb->ccb_h.status = 0;
1627                         switch (scsi_stat) {
1628                         case SCSI_STATUS_OK:
1629                                 ccb->ccb_h.status |= CAM_REQ_CMP;
1630                                 break;
1631                         case SCSI_STATUS_CHECK_COND:
1632                         case SCSI_STATUS_CMD_TERMINATED:
1633                                 bcopy(&dccb->sense_data, &ccb->csio.sense_data,
1634                                       ccb->csio.sense_len);
1635                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
1636                                 /* FALLTHROUGH */
1637                         default:
1638                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
1639                                 /* XXX Freeze DevQ */
1640                                 break;
1641                         }
1642                         ccb->csio.resid = residue_len;
1643                         dptfreeccb(dpt, dccb);
1644                         xpt_done(ccb);
1645                 } else {
1646                         dptprocesserror(dpt, dccb, ccb, hba_stat, scsi_stat,
1647                                         residue_len);
1648                 }
1649         }
1650 }
1651
1652 static void
1653 dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb, union ccb *ccb,
1654                 u_int hba_stat, u_int scsi_stat, u_int32_t resid)
1655 {
1656         ccb->csio.resid = resid;
1657         switch (hba_stat) {
1658         case HA_ERR_SEL_TO:
1659                 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
1660                 break;
1661         case HA_ERR_CMD_TO:
1662                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1663                 break;
1664         case HA_SCSIBUS_RESET:
1665         case HA_HBA_POWER_UP:   /* Similar effect to a bus reset??? */
1666                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
1667                 break;
1668         case HA_CP_ABORTED:
1669         case HA_CP_RESET:       /* XXX ??? */
1670         case HA_CP_ABORT_NA:    /* XXX ??? */
1671         case HA_CP_RESET_NA:    /* XXX ??? */
1672                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)
1673                         ccb->ccb_h.status = CAM_REQ_ABORTED;
1674                 break;
1675         case HA_PCI_PARITY:
1676         case HA_PCI_MABORT:
1677         case HA_PCI_TABORT:
1678         case HA_PCI_STABORT:
1679         case HA_BUS_PARITY:
1680         case HA_PARITY_ERR:
1681         case HA_ECC_ERR:
1682                 ccb->ccb_h.status = CAM_UNCOR_PARITY;
1683                 break;
1684         case HA_UNX_MSGRJCT:
1685                 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
1686                 break;
1687         case HA_UNX_BUSPHASE:
1688                 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
1689                 break;
1690         case HA_UNX_BUS_FREE:
1691                 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
1692                 break;
1693         case HA_SCSI_HUNG:
1694         case HA_RESET_STUCK:
1695                 /*
1696                  * Dead???  Can the controller get unstuck
1697                  * from these conditions
1698                  */
1699                 ccb->ccb_h.status = CAM_NO_HBA;
1700                 break;
1701         case HA_RSENSE_FAIL:
1702                 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
1703                 break;
1704         default:
1705                 printf("dpt%d: Undocumented Error %x\n", dpt->unit, hba_stat);
1706                 printf("Please mail this message to shimon@simon-shapiro.org\n");
1707                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1708                 break;
1709         }
1710         dptfreeccb(dpt, dccb);
1711         xpt_done(ccb);
1712 }
1713
1714 static void
1715 dpttimeout(void *arg)
1716 {
1717         struct dpt_ccb   *dccb;
1718         union  ccb       *ccb;
1719         struct dpt_softc *dpt;
1720         int               s;
1721
1722         dccb = (struct dpt_ccb *)arg;
1723         ccb = dccb->ccb;
1724         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
1725         xpt_print_path(ccb->ccb_h.path);
1726         printf("CCB %p - timed out\n", (void *)dccb);
1727
1728         s = splcam();
1729
1730         /*
1731          * Try to clear any pending jobs.  FreeBSD will loose interrupts,
1732          * leaving the controller suspended, and commands timed-out.
1733          * By calling the interrupt handler, any command thus stuck will be
1734          * completed.
1735          */
1736         dpt_intr(dpt);
1737
1738         if ((dccb->state & DCCB_ACTIVE) == 0) {
1739                 xpt_print_path(ccb->ccb_h.path);
1740                 printf("CCB %p - timed out CCB already completed\n",
1741                        (void *)dccb);
1742                 splx(s);
1743                 return;
1744         }
1745
1746         /* Abort this particular command.  Leave all others running */
1747         dpt_send_immediate(dpt, &dccb->eata_ccb, dccb->eata_ccb.cp_busaddr,
1748                            /*retries*/20000, EATA_SPECIFIC_ABORT, 0, 0);
1749         ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1750         splx(s);
1751 }
1752
1753 /*
1754  * Shutdown the controller and ensure that the cache is completely flushed.
1755  * Called from the shutdown_final event after all disk access has completed.
1756  */
1757 static void
1758 dptshutdown(void *arg, int howto)
1759 {
1760         dpt_softc_t *dpt;
1761
1762         dpt = (dpt_softc_t *)arg;
1763
1764         printf("dpt%d: Shutting down (mode %x) HBA.     Please wait...\n",
1765                dpt->unit, howto);
1766
1767         /*
1768          * What we do for a shutdown, is give the DPT early power loss warning
1769          */
1770         dpt_send_immediate(dpt, NULL, 0, EATA_POWER_OFF_WARN, 0, 0, 0);
1771         DELAY(1000 * 1000 * 5);
1772         printf("dpt%d: Controller was warned of shutdown and is now "
1773                "disabled\n", dpt->unit);
1774 }
1775
1776 /*============================================================================*/
1777
1778 #if 0
1779 #ifdef DPT_RESET_HBA
1780
1781 /*
1782 **      Function name : dpt_reset_hba
1783 **
1784 **      Description : Reset the HBA and properly discard all pending work
1785 **      Input :       Softc
1786 **      Output :      Nothing
1787 */
1788 static void
1789 dpt_reset_hba(dpt_softc_t *dpt)
1790 {
1791         eata_ccb_t       *ccb;
1792         int               ospl;
1793         dpt_ccb_t         dccb, *dccbp;
1794         int               result;
1795         struct scsi_xfer *xs;
1796
1797         /* Prepare a control block.  The SCSI command part is immaterial */
1798         dccb.xs = NULL;
1799         dccb.flags = 0;
1800         dccb.state = DPT_CCB_STATE_NEW;
1801         dccb.std_callback = NULL;
1802         dccb.wrbuff_callback = NULL;
1803
1804         ccb = &dccb.eata_ccb;
1805         ccb->CP_OpCode = EATA_CMD_RESET;
1806         ccb->SCSI_Reset = 0;
1807         ccb->HBA_Init = 1;
1808         ccb->Auto_Req_Sen = 1;
1809         ccb->cp_id = 0; /* Should be ignored */
1810         ccb->DataIn = 1;
1811         ccb->DataOut = 0;
1812         ccb->Interpret = 1;
1813         ccb->reqlen = htonl(sizeof(struct scsi_sense_data));
1814         ccb->cp_statDMA = htonl(vtophys(&ccb->cp_statDMA));
1815         ccb->cp_reqDMA = htonl(vtophys(&ccb->cp_reqDMA));
1816         ccb->cp_viraddr = (u_int32_t) & ccb;
1817
1818         ccb->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1819         ccb->cp_scsi_cmd = 0;  /* Should be ignored */
1820
1821         /* Lock up the submitted queue.  We are very persistant here */
1822         ospl = splcam();
1823         while (dpt->queue_status & DPT_SUBMITTED_QUEUE_ACTIVE) {
1824                 DELAY(100);
1825         }
1826
1827         dpt->queue_status |= DPT_SUBMITTED_QUEUE_ACTIVE;
1828         splx(ospl);
1829
1830         /* Send the RESET message */
1831         if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1832                                             EATA_CMD_RESET, 0, 0, 0, 0)) != 0) {
1833                 printf("dpt%d: Failed to send the RESET message.\n"
1834                        "      Trying cold boot (ouch!)\n", dpt->unit);
1835
1836
1837                 if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1838                                                     EATA_COLD_BOOT, 0, 0,
1839                                                     0, 0)) != 0) {
1840                         panic("dpt%d:  Faild to cold boot the HBA\n",
1841                               dpt->unit);
1842                 }
1843 #ifdef DPT_MEASURE_PERFORMANCE
1844                 dpt->performance.cold_boots++;
1845 #endif /* DPT_MEASURE_PERFORMANCE */
1846         }
1847
1848 #ifdef DPT_MEASURE_PERFORMANCE
1849         dpt->performance.warm_starts++;
1850 #endif /* DPT_MEASURE_PERFORMANCE */
1851
1852         printf("dpt%d:  Aborting pending requests.  O/S should re-submit\n",
1853                dpt->unit);
1854
1855         while ((dccbp = TAILQ_FIRST(&dpt->completed_ccbs)) != NULL) {
1856                 struct scsi_xfer *xs = dccbp->xs;
1857
1858                 /* Not all transactions have xs structs */
1859                 if (xs != NULL) {
1860                         /* Tell the kernel proper this did not complete well */
1861                         xs->error |= XS_SELTIMEOUT;
1862                         xs->flags |= SCSI_ITSDONE;
1863                         scsi_done(xs);
1864                 }
1865
1866                 dpt_Qremove_submitted(dpt, dccbp);
1867
1868                 /* Remember, Callbacks are NOT in the standard queue */
1869                 if (dccbp->std_callback != NULL) {
1870                         (dccbp->std_callback)(dpt, dccbp->eata_ccb.cp_channel,
1871                                                dccbp);
1872                 } else {
1873                         ospl = splcam();
1874                         dpt_Qpush_free(dpt, dccbp);
1875                         splx(ospl);
1876                 }
1877         }
1878
1879         printf("dpt%d: reset done aborting all pending commands\n", dpt->unit);
1880         dpt->queue_status &= ~DPT_SUBMITTED_QUEUE_ACTIVE;
1881 }
1882
1883 #endif /* DPT_RESET_HBA */
1884
1885 /*
1886  * Build a Command Block for target mode READ/WRITE BUFFER,
1887  * with the ``sync'' bit ON.
1888  *
1889  * Although the length and offset are 24 bit fields in the command, they cannot
1890  * exceed 8192 bytes, so we take them as short integers andcheck their range.
1891  * If they are sensless, we round them to zero offset, maximum length and
1892  * complain.
1893  */
1894
1895 static void
1896 dpt_target_ccb(dpt_softc_t * dpt, int bus, u_int8_t target, u_int8_t lun,
1897                dpt_ccb_t * ccb, int mode, u_int8_t command,
1898                u_int16_t length, u_int16_t offset)
1899 {
1900         eata_ccb_t     *cp;
1901         int             ospl;
1902
1903         if ((length + offset) > DPT_MAX_TARGET_MODE_BUFFER_SIZE) {
1904                 printf("dpt%d:  Length of %d, and offset of %d are wrong\n",
1905                        dpt->unit, length, offset);
1906                 length = DPT_MAX_TARGET_MODE_BUFFER_SIZE;
1907                 offset = 0;
1908         }
1909         ccb->xs = NULL;
1910         ccb->flags = 0;
1911         ccb->state = DPT_CCB_STATE_NEW;
1912         ccb->std_callback = (ccb_callback) dpt_target_done;
1913         ccb->wrbuff_callback = NULL;
1914
1915         cp = &ccb->eata_ccb;
1916         cp->CP_OpCode = EATA_CMD_DMA_SEND_CP;
1917         cp->SCSI_Reset = 0;
1918         cp->HBA_Init = 0;
1919         cp->Auto_Req_Sen = 1;
1920         cp->cp_id = target;
1921         cp->DataIn = 1;
1922         cp->DataOut = 0;
1923         cp->Interpret = 0;
1924         cp->reqlen = htonl(sizeof(struct scsi_sense_data));
1925         cp->cp_statDMA = htonl(vtophys(&cp->cp_statDMA));
1926         cp->cp_reqDMA = htonl(vtophys(&cp->cp_reqDMA));
1927         cp->cp_viraddr = (u_int32_t) & ccb;
1928
1929         cp->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1930
1931         cp->cp_scsi_cmd = command;
1932         cp->cp_cdb[1] = (u_int8_t) (mode & SCSI_TM_MODE_MASK);
1933         cp->cp_lun = lun;       /* Order is important here! */
1934         cp->cp_cdb[2] = 0x00;   /* Buffer Id, only 1 :-( */
1935         cp->cp_cdb[3] = (length >> 16) & 0xFF;  /* Buffer offset MSB */
1936         cp->cp_cdb[4] = (length >> 8) & 0xFF;
1937         cp->cp_cdb[5] = length & 0xFF;
1938         cp->cp_cdb[6] = (length >> 16) & 0xFF;  /* Length MSB */
1939         cp->cp_cdb[7] = (length >> 8) & 0xFF;
1940         cp->cp_cdb[8] = length & 0xFF;  /* Length LSB */
1941         cp->cp_cdb[9] = 0;      /* No sync, no match bits */
1942
1943         /*
1944          * This could be optimized to live in dpt_register_buffer.
1945          * We keep it here, just in case the kernel decides to reallocate pages
1946          */
1947         if (dpt_scatter_gather(dpt, ccb, DPT_RW_BUFFER_SIZE,
1948                                dpt->rw_buffer[bus][target][lun])) {
1949                 printf("dpt%d: Failed to setup Scatter/Gather for "
1950                        "Target-Mode buffer\n", dpt->unit);
1951         }
1952 }
1953
1954 /* Setup a target mode READ command */
1955
1956 static void
1957 dpt_set_target(int redo, dpt_softc_t * dpt,
1958                u_int8_t bus, u_int8_t target, u_int8_t lun, int mode,
1959                u_int16_t length, u_int16_t offset, dpt_ccb_t * ccb)
1960 {
1961         int ospl;
1962
1963         if (dpt->target_mode_enabled) {
1964                 ospl = splcam();
1965
1966                 if (!redo)
1967                         dpt_target_ccb(dpt, bus, target, lun, ccb, mode,
1968                                        SCSI_TM_READ_BUFFER, length, offset);
1969
1970                 ccb->transaction_id = ++dpt->commands_processed;
1971
1972 #ifdef DPT_MEASURE_PERFORMANCE
1973                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
1974                 ccb->command_started = microtime_now;
1975 #endif
1976                 dpt_Qadd_waiting(dpt, ccb);
1977                 dpt_sched_queue(dpt);
1978
1979                 splx(ospl);
1980         } else {
1981                 printf("dpt%d:  Target Mode Request, but Target Mode is OFF\n",
1982                        dpt->unit);
1983         }
1984 }
1985
1986 /*
1987  * Schedule a buffer to be sent to another target.
1988  * The work will be scheduled and the callback provided will be called when
1989  * the work is actually done.
1990  *
1991  * Please NOTE:  ``Anyone'' can send a buffer, but only registered clients
1992  * get notified of receipt of buffers.
1993  */
1994
1995 int
1996 dpt_send_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
1997                 u_int8_t mode, u_int16_t length, u_int16_t offset, void *data,
1998                 buff_wr_done callback)
1999 {
2000         dpt_softc_t    *dpt;
2001         dpt_ccb_t      *ccb = NULL;
2002         int             ospl;
2003
2004         /* This is an external call.  Be a bit paranoid */
2005         for (dpt = TAILQ_FIRST(&dpt_softc_list);
2006              dpt != NULL;
2007              dpt = TAILQ_NEXT(dpt, links)) {
2008                 if (dpt->unit == unit)
2009                         goto valid_unit;
2010         }
2011
2012         return (INVALID_UNIT);
2013
2014 valid_unit:
2015
2016         if (dpt->target_mode_enabled) {
2017                 if ((channel >= dpt->channels) || (target > dpt->max_id) ||
2018                     (lun > dpt->max_lun)) {
2019                         return (INVALID_SENDER);
2020                 }
2021                 if ((dpt->rw_buffer[channel][target][lun] == NULL) ||
2022                     (dpt->buffer_receiver[channel][target][lun] == NULL))
2023                         return (NOT_REGISTERED);
2024
2025                 ospl = splsoftcam();
2026                 /* Process the free list */
2027                 if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2028                         printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2029                                "             Please try later\n",
2030                                dpt->unit);
2031                         splx(ospl);
2032                         return (NO_RESOURCES);
2033                 }
2034                 /* Now grab the newest CCB */
2035                 if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2036                         splx(ospl);
2037                         panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2038                 }
2039                 splx(ospl);
2040
2041                 bcopy(dpt->rw_buffer[channel][target][lun] + offset, data, length);
2042                 dpt_target_ccb(dpt, channel, target, lun, ccb, mode,
2043                                            SCSI_TM_WRITE_BUFFER,
2044                                            length, offset);
2045                 ccb->std_callback = (ccb_callback) callback; /* Potential trouble */
2046
2047                 ospl = splcam();
2048                 ccb->transaction_id = ++dpt->commands_processed;
2049
2050 #ifdef DPT_MEASURE_PERFORMANCE
2051                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
2052                 ccb->command_started = microtime_now;
2053 #endif
2054                 dpt_Qadd_waiting(dpt, ccb);
2055                 dpt_sched_queue(dpt);
2056
2057                 splx(ospl);
2058                 return (0);
2059         }
2060         return (DRIVER_DOWN);
2061 }
2062
2063 static void
2064 dpt_target_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2065 {
2066         int             ospl;
2067         eata_ccb_t     *cp;
2068
2069         cp = &ccb->eata_ccb;
2070
2071         /*
2072          * Remove the CCB from the waiting queue.
2073          *  We do NOT put it back on the free, etc., queues as it is a special
2074          * ccb, owned by the dpt_softc of this unit.
2075          */
2076         ospl = splsoftcam();
2077         dpt_Qremove_completed(dpt, ccb);
2078         splx(ospl);
2079
2080 #define br_channel           (ccb->eata_ccb.cp_channel)
2081 #define br_target            (ccb->eata_ccb.cp_id)
2082 #define br_lun               (ccb->eata_ccb.cp_LUN)
2083 #define br_index             [br_channel][br_target][br_lun]
2084 #define read_buffer_callback (dpt->buffer_receiver br_index )
2085 #define read_buffer          (dpt->rw_buffer[br_channel][br_target][br_lun])
2086 #define cb(offset)           (ccb->eata_ccb.cp_cdb[offset])
2087 #define br_offset            ((cb(3) << 16) | (cb(4) << 8) | cb(5))
2088 #define br_length            ((cb(6) << 16) | (cb(7) << 8) | cb(8))
2089
2090         /* Different reasons for being here, you know... */
2091         switch (ccb->eata_ccb.cp_scsi_cmd) {
2092         case SCSI_TM_READ_BUFFER:
2093                 if (read_buffer_callback != NULL) {
2094                         /* This is a buffer generated by a kernel process */
2095                         read_buffer_callback(dpt->unit, br_channel,
2096                                              br_target, br_lun,
2097                                              read_buffer,
2098                                              br_offset, br_length);
2099                 } else {
2100                         /*
2101                          * This is a buffer waited for by a user (sleeping)
2102                          * command
2103                          */
2104                         wakeup(ccb);
2105                 }
2106
2107                 /* We ALWAYS re-issue the same command; args are don't-care  */
2108                 dpt_set_target(1, 0, 0, 0, 0, 0, 0, 0, 0);
2109                 break;
2110
2111         case SCSI_TM_WRITE_BUFFER:
2112                 (ccb->wrbuff_callback) (dpt->unit, br_channel, br_target,
2113                                         br_offset, br_length,
2114                                         br_lun, ccb->status_packet.hba_stat);
2115                 break;
2116         default:
2117                 printf("dpt%d:  %s is an unsupported command for target mode\n",
2118                        dpt->unit, scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd));
2119         }
2120         ospl = splsoftcam();
2121         dpt->target_ccb[br_channel][br_target][br_lun] = NULL;
2122         dpt_Qpush_free(dpt, ccb);
2123         splx(ospl);
2124 }
2125
2126
2127 /*
2128  * Use this function to register a client for a buffer read target operation.
2129  * The function you register will be called every time a buffer is received
2130  * by the target mode code.
2131  */
2132 dpt_rb_t
2133 dpt_register_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
2134                     u_int8_t mode, u_int16_t length, u_int16_t offset,
2135                     dpt_rec_buff callback, dpt_rb_op_t op)
2136 {
2137         dpt_softc_t    *dpt;
2138         dpt_ccb_t      *ccb = NULL;
2139         int             ospl;
2140
2141         for (dpt = TAILQ_FIRST(&dpt_softc_list);
2142              dpt != NULL;
2143              dpt = TAILQ_NEXT(dpt, links)) {
2144                 if (dpt->unit == unit)
2145                         goto valid_unit;
2146         }
2147
2148         return (INVALID_UNIT);
2149
2150 valid_unit:
2151
2152         if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
2153                 return (DRIVER_DOWN);
2154
2155         if ((channel > (dpt->channels - 1)) || (target > (dpt->max_id - 1)) ||
2156             (lun > (dpt->max_lun - 1)))
2157                 return (INVALID_SENDER);
2158
2159         if (dpt->buffer_receiver[channel][target][lun] == NULL) {
2160                 if (op == REGISTER_BUFFER) {
2161                         /* Assign the requested callback */
2162                         dpt->buffer_receiver[channel][target][lun] = callback;
2163                         /* Get a CCB */
2164                         ospl = splsoftcam();
2165
2166                         /* Process the free list */
2167                         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2168                                 printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2169                                        "             Please try later\n",
2170                                        dpt->unit);
2171                                 splx(ospl);
2172                                 return (NO_RESOURCES);
2173                         }
2174                         /* Now grab the newest CCB */
2175                         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2176                                 splx(ospl);
2177                                 panic("dpt%d: Got a NULL CCB from pop_free()\n",
2178                                       dpt->unit);
2179                         }
2180                         splx(ospl);
2181
2182                         /* Clean up the leftover of the previous tenant */
2183                         ccb->status = DPT_CCB_STATE_NEW;
2184                         dpt->target_ccb[channel][target][lun] = ccb;
2185
2186                         dpt->rw_buffer[channel][target][lun] =
2187                                 malloc(DPT_RW_BUFFER_SIZE, M_DEVBUF, M_NOWAIT);
2188                         if (dpt->rw_buffer[channel][target][lun] == NULL) {
2189                                 printf("dpt%d: Failed to allocate "
2190                                        "Target-Mode buffer\n", dpt->unit);
2191                                 ospl = splsoftcam();
2192                                 dpt_Qpush_free(dpt, ccb);
2193                                 splx(ospl);
2194                                 return (NO_RESOURCES);
2195                         }
2196                         dpt_set_target(0, dpt, channel, target, lun, mode,
2197                                        length, offset, ccb);
2198                         return (SUCCESSFULLY_REGISTERED);
2199                 } else
2200                         return (NOT_REGISTERED);
2201         } else {
2202                 if (op == REGISTER_BUFFER) {
2203                         if (dpt->buffer_receiver[channel][target][lun] == callback)
2204                                 return (ALREADY_REGISTERED);
2205                         else
2206                                 return (REGISTERED_TO_ANOTHER);
2207                 } else {
2208                         if (dpt->buffer_receiver[channel][target][lun] == callback) {
2209                                 dpt->buffer_receiver[channel][target][lun] = NULL;
2210                                 ospl = splsoftcam();
2211                                 dpt_Qpush_free(dpt, ccb);
2212                                 splx(ospl);
2213                                 free(dpt->rw_buffer[channel][target][lun], M_DEVBUF);
2214                                 return (SUCCESSFULLY_REGISTERED);
2215                         } else
2216                                 return (INVALID_CALLBACK);
2217                 }
2218
2219         }
2220 }
2221
2222 /* Return the state of the blinking DPT LED's */
2223 u_int8_t
2224 dpt_blinking_led(dpt_softc_t * dpt)
2225 {
2226         int             ndx;
2227         int             ospl;
2228         u_int32_t       state;
2229         u_int32_t       previous;
2230         u_int8_t        result;
2231
2232         ospl = splcam();
2233
2234         result = 0;
2235
2236         for (ndx = 0, state = 0, previous = 0;
2237              (ndx < 10) && (state != previous);
2238              ndx++) {
2239                 previous = state;
2240                 state = dpt_inl(dpt, 1);
2241         }
2242
2243         if ((state == previous) && (state == DPT_BLINK_INDICATOR))
2244                 result = dpt_inb(dpt, 5);
2245
2246         splx(ospl);
2247         return (result);
2248 }
2249
2250 /*
2251  * Execute a command which did not come from the kernel's SCSI layer.
2252  * The only way to map user commands to bus and target is to comply with the
2253  * standard DPT wire-down scheme:
2254  */
2255 int
2256 dpt_user_cmd(dpt_softc_t * dpt, eata_pt_t * user_cmd,
2257              caddr_t cmdarg, int minor_no)
2258 {
2259         dpt_ccb_t *ccb;
2260         void      *data;
2261         int        channel, target, lun;
2262         int        huh;
2263         int        result;
2264         int        ospl;
2265         int        submitted;
2266
2267         data = NULL;
2268         channel = minor2hba(minor_no);
2269         target = minor2target(minor_no);
2270         lun = minor2lun(minor_no);
2271
2272         if ((channel > (dpt->channels - 1))
2273          || (target > dpt->max_id)
2274          || (lun > dpt->max_lun))
2275                 return (ENXIO);
2276
2277         if (target == dpt->sc_scsi_link[channel].adapter_targ) {
2278                 /* This one is for the controller itself */
2279                 if ((user_cmd->eataID[0] != 'E')
2280                  || (user_cmd->eataID[1] != 'A')
2281                  || (user_cmd->eataID[2] != 'T')
2282                  || (user_cmd->eataID[3] != 'A')) {
2283                         return (ENXIO);
2284                 }
2285         }
2286         /* Get a DPT CCB, so we can prepare a command */
2287         ospl = splsoftcam();
2288
2289         /* Process the free list */
2290         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2291                 printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2292                        "             Please try later\n",
2293                        dpt->unit);
2294                 splx(ospl);
2295                 return (EFAULT);
2296         }
2297         /* Now grab the newest CCB */
2298         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2299                 splx(ospl);
2300                 panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2301         } else {
2302                 splx(ospl);
2303                 /* Clean up the leftover of the previous tenant */
2304                 ccb->status = DPT_CCB_STATE_NEW;
2305         }
2306
2307         bcopy((caddr_t) & user_cmd->command_packet, (caddr_t) & ccb->eata_ccb,
2308               sizeof(eata_ccb_t));
2309
2310         /* We do not want to do user specified scatter/gather.  Why?? */
2311         if (ccb->eata_ccb.scatter == 1)
2312                 return (EINVAL);
2313
2314         ccb->eata_ccb.Auto_Req_Sen = 1;
2315         ccb->eata_ccb.reqlen = htonl(sizeof(struct scsi_sense_data));
2316         ccb->eata_ccb.cp_datalen = htonl(sizeof(ccb->eata_ccb.cp_datalen));
2317         ccb->eata_ccb.cp_dataDMA = htonl(vtophys(ccb->eata_ccb.cp_dataDMA));
2318         ccb->eata_ccb.cp_statDMA = htonl(vtophys(&ccb->eata_ccb.cp_statDMA));
2319         ccb->eata_ccb.cp_reqDMA = htonl(vtophys(&ccb->eata_ccb.cp_reqDMA));
2320         ccb->eata_ccb.cp_viraddr = (u_int32_t) & ccb;
2321
2322         if (ccb->eata_ccb.DataIn || ccb->eata_ccb.DataOut) {
2323                 /* Data I/O is involved in this command.  Alocate buffer */
2324                 if (ccb->eata_ccb.cp_datalen > PAGE_SIZE) {
2325                         data = contigmalloc(ccb->eata_ccb.cp_datalen,
2326                                             M_TEMP, M_WAITOK, 0, ~0,
2327                                             ccb->eata_ccb.cp_datalen,
2328                                             0x10000);
2329                 } else {
2330                         data = malloc(ccb->eata_ccb.cp_datalen, M_TEMP,
2331                                       M_WAITOK);
2332                 }
2333
2334                 if (data == NULL) {
2335                         printf("dpt%d: Cannot allocate %d bytes "
2336                                "for EATA command\n", dpt->unit,
2337                                ccb->eata_ccb.cp_datalen);
2338                         return (EFAULT);
2339                 }
2340 #define usr_cmd_DMA (caddr_t)user_cmd->command_packet.cp_dataDMA
2341                 if (ccb->eata_ccb.DataIn == 1) {
2342                         if (copyin(usr_cmd_DMA,
2343                                    data, ccb->eata_ccb.cp_datalen) == -1)
2344                                 return (EFAULT);
2345                 }
2346         } else {
2347                 /* No data I/O involved here.  Make sure the DPT knows that */
2348                 ccb->eata_ccb.cp_datalen = 0;
2349                 data = NULL;
2350         }
2351
2352         if (ccb->eata_ccb.FWNEST == 1)
2353                 ccb->eata_ccb.FWNEST = 0;
2354
2355         if (ccb->eata_ccb.cp_datalen != 0) {
2356                 if (dpt_scatter_gather(dpt, ccb, ccb->eata_ccb.cp_datalen,
2357                                        data) != 0) {
2358                         if (data != NULL)
2359                                 free(data, M_TEMP);
2360                         return (EFAULT);
2361                 }
2362         }
2363         /**
2364          * We are required to quiet a SCSI bus.
2365          * since we do not queue comands on a bus basis,
2366          * we wait for ALL commands on a controller to complete.
2367          * In the mean time, sched_queue() will not schedule new commands.
2368          */
2369         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2370             && (ccb->eata_ccb.cp_cdb[2] == BUS_QUIET)) {
2371                 /* We wait for ALL traffic for this HBa to subside */
2372                 ospl = splsoftcam();
2373                 dpt->state |= DPT_HA_QUIET;
2374                 splx(ospl);
2375
2376                 while ((submitted = dpt->submitted_ccbs_count) != 0) {
2377                         huh = tsleep((void *) dpt, PCATCH, "dptqt", 100 * hz);
2378                         switch (huh) {
2379                         case 0:
2380                                 /* Wakeup call received */
2381                                 break;
2382                         case EWOULDBLOCK:
2383                                 /* Timer Expired */
2384                                 break;
2385                         default:
2386                                 /* anything else */
2387                                 break;
2388                         }
2389                 }
2390         }
2391         /* Resume normal operation */
2392         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2393             && (ccb->eata_ccb.cp_cdb[2] == BUS_UNQUIET)) {
2394                 ospl = splsoftcam();
2395                 dpt->state &= ~DPT_HA_QUIET;
2396                 splx(ospl);
2397         }
2398         /**
2399          * Schedule the command and submit it.
2400          * We bypass dpt_sched_queue, as it will block on DPT_HA_QUIET
2401          */
2402         ccb->xs = NULL;
2403         ccb->flags = 0;
2404         ccb->eata_ccb.Auto_Req_Sen = 1; /* We always want this feature */
2405
2406         ccb->transaction_id = ++dpt->commands_processed;
2407         ccb->std_callback = (ccb_callback) dpt_user_cmd_done;
2408         ccb->result = (u_int32_t) & cmdarg;
2409         ccb->data = data;
2410
2411 #ifdef DPT_MEASURE_PERFORMANCE
2412         ++dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd];
2413         ccb->command_started = microtime_now;
2414 #endif
2415         ospl = splcam();
2416         dpt_Qadd_waiting(dpt, ccb);
2417         splx(ospl);
2418
2419         dpt_sched_queue(dpt);
2420
2421         /* Wait for the command to complete */
2422         (void) tsleep((void *) ccb, PCATCH, "dptucw", 100 * hz);
2423
2424         /* Free allocated memory */
2425         if (data != NULL)
2426                 free(data, M_TEMP);
2427
2428         return (0);
2429 }
2430
2431 static void
2432 dpt_user_cmd_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2433 {
2434         int             ospl = splsoftcam();
2435         u_int32_t       result;
2436         caddr_t         cmd_arg;
2437
2438         /**
2439          * If Auto Request Sense is on, copyout the sense struct
2440          */
2441 #define usr_pckt_DMA    (caddr_t)(intptr_t)ntohl(ccb->eata_ccb.cp_reqDMA)
2442 #define usr_pckt_len    ntohl(ccb->eata_ccb.cp_datalen)
2443         if (ccb->eata_ccb.Auto_Req_Sen == 1) {
2444                 if (copyout((caddr_t) & ccb->sense_data, usr_pckt_DMA,
2445                             sizeof(struct scsi_sense_data))) {
2446                         ccb->result = EFAULT;
2447                         dpt_Qpush_free(dpt, ccb);
2448                         splx(ospl);
2449                         wakeup(ccb);
2450                         return;
2451                 }
2452         }
2453         /* If DataIn is on, copyout the data */
2454         if ((ccb->eata_ccb.DataIn == 1)
2455             && (ccb->status_packet.hba_stat == HA_NO_ERROR)) {
2456                 if (copyout(ccb->data, usr_pckt_DMA, usr_pckt_len)) {
2457                         dpt_Qpush_free(dpt, ccb);
2458                         ccb->result = EFAULT;
2459
2460                         splx(ospl);
2461                         wakeup(ccb);
2462                         return;
2463                 }
2464         }
2465         /* Copyout the status */
2466         result = ccb->status_packet.hba_stat;
2467         cmd_arg = (caddr_t) ccb->result;
2468
2469         if (copyout((caddr_t) & result, cmd_arg, sizeof(result))) {
2470                 dpt_Qpush_free(dpt, ccb);
2471                 ccb->result = EFAULT;
2472                 splx(ospl);
2473                 wakeup(ccb);
2474                 return;
2475         }
2476         /* Put the CCB back in the freelist */
2477         ccb->state |= DPT_CCB_STATE_COMPLETED;
2478         dpt_Qpush_free(dpt, ccb);
2479
2480         /* Free allocated memory */
2481         splx(ospl);
2482         return;
2483 }
2484
2485 #ifdef DPT_HANDLE_TIMEOUTS
2486 /**
2487  * This function walks down the SUBMITTED queue.
2488  * Every request that is too old gets aborted and marked.
2489  * Since the DPT will complete (interrupt) immediately (what does that mean?),
2490  * We just walk the list, aborting old commands and marking them as such.
2491  * The dpt_complete function will get rid of the that were interrupted in the
2492  * normal manner.
2493  *
2494  * This function needs to run at splcam(), as it interacts with the submitted
2495  * queue, as well as the completed and free queues.  Just like dpt_intr() does.
2496  * To run it at any ISPL other than that of dpt_intr(), will mean that dpt_intr
2497  * willbe able to pre-empt it, grab a transaction in progress (towards
2498  * destruction) and operate on it.  The state of this transaction will be not
2499  * very clear.
2500  * The only other option, is to lock it only as long as necessary but have
2501  * dpt_intr() spin-wait on it. In a UP environment this makes no sense and in
2502  * a SMP environment, the advantage is dubvious for a function that runs once
2503  * every ten seconds for few microseconds and, on systems with healthy
2504  * hardware, does not do anything anyway.
2505  */
2506
2507 static void
2508 dpt_handle_timeouts(dpt_softc_t * dpt)
2509 {
2510         dpt_ccb_t      *ccb;
2511         int             ospl;
2512
2513         ospl = splcam();
2514
2515         if (dpt->state & DPT_HA_TIMEOUTS_ACTIVE) {
2516                 printf("dpt%d WARNING: Timeout Handling Collision\n",
2517                        dpt->unit);
2518                 splx(ospl);
2519                 return;
2520         }
2521         dpt->state |= DPT_HA_TIMEOUTS_ACTIVE;
2522
2523         /* Loop through the entire submitted queue, looking for lost souls */
2524         for (ccb = TAILQ_FIRST(&dpt->submitted_ccbs);
2525              ccb != NULL;
2526              ccb = TAILQ_NEXT(ccb, links)) {
2527                 struct scsi_xfer *xs;
2528                 u_int32_t       age, max_age;
2529
2530                 xs = ccb->xs;
2531                 age = dpt_time_delta(ccb->command_started, microtime_now);
2532
2533 #define TenSec  10000000
2534
2535                 if (xs == NULL) {       /* Local, non-kernel call */
2536                         max_age = TenSec;
2537                 } else {
2538                         max_age = (((xs->timeout * (dpt->submitted_ccbs_count
2539                                                     + DPT_TIMEOUT_FACTOR))
2540                                     > TenSec)
2541                                  ? (xs->timeout * (dpt->submitted_ccbs_count
2542                                                    + DPT_TIMEOUT_FACTOR))
2543                                    : TenSec);
2544                 }
2545
2546                 /*
2547                  * If a transaction is marked lost and is TWICE as old as we
2548                  * care, then, and only then do we destroy it!
2549                  */
2550                 if (ccb->state & DPT_CCB_STATE_MARKED_LOST) {
2551                         /* Remember who is next */
2552                         if (age > (max_age * 2)) {
2553                                 dpt_Qremove_submitted(dpt, ccb);
2554                                 ccb->state &= ~DPT_CCB_STATE_MARKED_LOST;
2555                                 ccb->state |= DPT_CCB_STATE_ABORTED;
2556 #define cmd_name scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd)
2557                                 if (ccb->retries++ > DPT_RETRIES) {
2558                                         printf("dpt%d ERROR: Destroying stale "
2559                                                "%d (%s)\n"
2560                                                "                on "
2561                                                "c%db%dt%du%d (%d/%d)\n",
2562                                              dpt->unit, ccb->transaction_id,
2563                                                cmd_name,
2564                                                dpt->unit,
2565                                                ccb->eata_ccb.cp_channel,
2566                                                ccb->eata_ccb.cp_id,
2567                                                ccb->eata_ccb.cp_LUN, age,
2568                                                ccb->retries);
2569 #define send_ccb &ccb->eata_ccb
2570 #define ESA      EATA_SPECIFIC_ABORT
2571                                         (void) dpt_send_immediate(dpt,
2572                                                                   send_ccb,
2573                                                                   ESA,
2574                                                                   0, 0);
2575                                         dpt_Qpush_free(dpt, ccb);
2576
2577                                         /* The SCSI layer should re-try */
2578                                         xs->error |= XS_TIMEOUT;
2579                                         xs->flags |= SCSI_ITSDONE;
2580                                         scsi_done(xs);
2581                                 } else {
2582                                         printf("dpt%d ERROR: Stale %d (%s) on "
2583                                                "c%db%dt%du%d (%d)\n"
2584                                              "          gets another "
2585                                                "chance(%d/%d)\n",
2586                                              dpt->unit, ccb->transaction_id,
2587                                                cmd_name,
2588                                                dpt->unit,
2589                                                ccb->eata_ccb.cp_channel,
2590                                                ccb->eata_ccb.cp_id,
2591                                                ccb->eata_ccb.cp_LUN,
2592                                             age, ccb->retries, DPT_RETRIES);
2593
2594                                         dpt_Qpush_waiting(dpt, ccb);
2595                                         dpt_sched_queue(dpt);
2596                                 }
2597                         }
2598                 } else {
2599                         /*
2600                          * This is a transaction that is not to be destroyed
2601                          * (yet) But it is too old for our liking. We wait as
2602                          * long as the upper layer thinks. Not really, we
2603                          * multiply that by the number of commands in the
2604                          * submitted queue + 1.
2605                          */
2606                         if (!(ccb->state & DPT_CCB_STATE_MARKED_LOST) &&
2607                             (age != ~0) && (age > max_age)) {
2608                                 printf("dpt%d ERROR: Marking %d (%s) on "
2609                                        "c%db%dt%du%d \n"
2610                                        "            as late after %dusec\n",
2611                                        dpt->unit, ccb->transaction_id,
2612                                        cmd_name,
2613                                        dpt->unit, ccb->eata_ccb.cp_channel,
2614                                        ccb->eata_ccb.cp_id,
2615                                        ccb->eata_ccb.cp_LUN, age);
2616                                 ccb->state |= DPT_CCB_STATE_MARKED_LOST;
2617                         }
2618                 }
2619         }
2620
2621         dpt->state &= ~DPT_HA_TIMEOUTS_ACTIVE;
2622         splx(ospl);
2623 }
2624
2625 static void
2626 dpt_timeout(void *arg)
2627 {
2628         dpt_softc_t    *dpt = (dpt_softc_t *) arg;
2629
2630         if (!(dpt->state & DPT_HA_TIMEOUTS_ACTIVE))
2631                 dpt_handle_timeouts(dpt);
2632
2633         timeout(dpt_timeout, (caddr_t) dpt, hz * 10);
2634 }
2635
2636 #endif                          /* DPT_HANDLE_TIMEOUTS */
2637
2638 #endif