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 1.8 2004/09/17 03:39:39 joerg 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_INTWAIT);
 311
 312         /* Allocate S/G space for the next batch of CCBS */
 313         if (bus_dmamem_alloc(dpt->sg_dmat, (void **)&sg_map->sg_vaddr,
 314                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
 315                 free(sg_map, M_DEVBUF);
 316                 return (NULL);
 317         }
 318
 319         (void)bus_dmamap_load(dpt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
 320                               PAGE_SIZE, dptmapmem, &sg_map->sg_physaddr,
 321                               /*flags*/0);
 322
 323         SLIST_INSERT_HEAD(&dpt->sg_maps, sg_map, links);
 324
 325         return (sg_map);
 326 }
 327
 328 /*
 329  * Allocate another chunk of CCB's. Return count of entries added.
 330  * Assumed to be called at splcam().
 331  */
 332 static int
 333 dptallocccbs(dpt_softc_t *dpt)
 334 {
 335         struct dpt_ccb *next_ccb;
 336         struct sg_map_node *sg_map;
 337         bus_addr_t physaddr;
 338         dpt_sg_t *segs;
 339         int newcount;
 340         int i;
 341
 342         next_ccb = &dpt->dpt_dccbs[dpt->total_dccbs];
 343
 344         if (next_ccb == dpt->dpt_dccbs) {
 345                 /*
 346                  * First time through.  Re-use the S/G
 347                  * space we allocated for initialization
 348                  * CCBS.
 349                  */
 350                 sg_map = SLIST_FIRST(&dpt->sg_maps);
 351         } else {
 352                 sg_map = dptallocsgmap(dpt);
 353         }
 354
 355         if (sg_map == NULL)
 356                 return (0);
 357
 358         segs = sg_map->sg_vaddr;
 359         physaddr = sg_map->sg_physaddr;
 360
 361         newcount = (PAGE_SIZE / (dpt->sgsize * sizeof(dpt_sg_t)));
 362         for (i = 0; dpt->total_dccbs < dpt->max_dccbs && i < newcount; i++) {
 363                 int error;
 364
 365                 error = bus_dmamap_create(dpt->buffer_dmat, /*flags*/0,
 366                                           &next_ccb->dmamap);
 367                 if (error != 0)
 368                         break;
 369                 next_ccb->sg_list = segs;
 370                 next_ccb->sg_busaddr = htonl(physaddr);
 371                 next_ccb->eata_ccb.cp_dataDMA = htonl(physaddr);
 372                 next_ccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
 373                 next_ccb->eata_ccb.cp_reqDMA =
 374                     htonl(dptccbvtop(dpt, next_ccb)
 375                         + offsetof(struct dpt_ccb, sense_data));
 376                 next_ccb->eata_ccb.cp_busaddr = dpt->dpt_ccb_busend;
 377                 next_ccb->state = DCCB_FREE;
 378                 next_ccb->tag = dpt->total_dccbs;
 379                 SLIST_INSERT_HEAD(&dpt->free_dccb_list, next_ccb, links);
 380                 segs += dpt->sgsize;
 381                 physaddr += (dpt->sgsize * sizeof(dpt_sg_t));
 382                 dpt->dpt_ccb_busend += sizeof(*next_ccb);
 383                 next_ccb++;
 384                 dpt->total_dccbs++;
 385         }
 386         return (i);
 387 }
 388
 389 dpt_conf_t *
 390 dpt_pio_get_conf (u_int32_t base)
 391 {
 392         static dpt_conf_t *     conf;
 393         u_int16_t *             p;
 394         int                     i;
 395
 396         /*
 397          * Allocate a dpt_conf_t
 398          */
 399         if (conf == NULL)
 400                 conf = malloc(sizeof(dpt_conf_t), M_DEVBUF, M_INTWAIT);
 401
 402         /*
 403          * If we have one, clean it up.
 404          */
 405         bzero(conf, sizeof(dpt_conf_t));
 406
 407         /*
 408          * Reset the controller.
 409          */
 410         outb((base + HA_WCOMMAND), EATA_CMD_RESET);
 411
 412         /*
 413          * Wait for the controller to become ready.
 414          * For some reason there can be -no- delays after calling reset
 415          * before we wait on ready status.
 416          */
 417         if (dpt_pio_wait(base, HA_RSTATUS, HA_SBUSY, 0)) {
 418                 printf("dpt: timeout waiting for controller to become ready\n");
 419                 return (NULL);
 420         }
 421
 422         if (dpt_pio_wait(base, HA_RAUXSTAT, HA_ABUSY, 0)) {
 423                 printf("dpt: timetout waiting for adapter ready.\n");
 424                 return (NULL);
 425         }
 426
 427         /*
 428          * Send the PIO_READ_CONFIG command.
 429          */
 430         outb((base + HA_WCOMMAND), EATA_CMD_PIO_READ_CONFIG);
 431
 432         /*
 433          * Read the data into the struct.
 434          */
 435         p = (u_int16_t *)conf;
 436         for (i = 0; i < (sizeof(dpt_conf_t) / 2); i++) {
 437
 438                 if (dpt_pio_wait(base, HA_RSTATUS, HA_SDRQ, 0)) {
 439                         printf("dpt: timeout in data read.\n");
 440                         return (NULL);
 441                 }
 442
 443                 (*p) = inw(base + HA_RDATA);
 444                 p++;
 445         }
 446
 447         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 448                 printf("dpt: error reading configuration data.\n");
 449                 return (NULL);
 450         }
 451
 452 #define BE_EATA_SIGNATURE       0x45415441
 453 #define LE_EATA_SIGNATURE       0x41544145
 454
 455         /*
 456          * Test to see if we have a valid card.
 457          */
 458         if ((conf->signature == BE_EATA_SIGNATURE) ||
 459             (conf->signature == LE_EATA_SIGNATURE)) {
 460
 461                 while (inb(base + HA_RSTATUS) & HA_SDRQ) {
 462                         inw(base + HA_RDATA);
 463                 }
 464
 465                 return (conf);
 466         }
 467         return (NULL);
 468 }
 469
 470 /*
 471  * Read a configuration page into the supplied dpt_cont_t buffer.
 472  */
 473 static int
 474 dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
 475              u_int size, u_int page, u_int target, int extent)
 476 {
 477         eata_ccb_t *cp;
 478
 479         u_int8_t   status;
 480
 481         int        ndx;
 482         int        ospl;
 483         int        result;
 484
 485         cp = &dccb->eata_ccb;
 486         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(*dpt->sp));
 487
 488         cp->Interpret = 1;
 489         cp->DataIn = 1;
 490         cp->Auto_Req_Sen = 1;
 491         cp->reqlen = sizeof(struct scsi_sense_data);
 492
 493         cp->cp_id = target;
 494         cp->cp_LUN = 0;         /* In the EATA packet */
 495         cp->cp_lun = 0;         /* In the SCSI command */
 496
 497         cp->cp_scsi_cmd = INQUIRY;
 498         cp->cp_len = size;
 499
 500         cp->cp_extent = extent;
 501
 502         cp->cp_page = page;
 503         cp->cp_channel = 0;     /* DNC, Interpret mode is set */
 504         cp->cp_identify = 1;
 505         cp->cp_datalen = htonl(size);
 506
 507         ospl = splcam();
 508
 509         /*
 510          * This could be a simple for loop, but we suspected the compiler To
 511          * have optimized it a bit too much. Wait for the controller to
 512          * become ready
 513          */
 514         while (((status = dpt_inb(dpt, HA_RSTATUS)) != (HA_SREADY | HA_SSC)
 515              && (status != (HA_SREADY | HA_SSC | HA_SERROR))
 516              && (status != (HA_SDRDY | HA_SERROR | HA_SDRQ)))
 517             || (dpt_wait(dpt, HA_SBUSY, 0))) {
 518
 519                 /*
 520                  * RAID Drives still Spinning up? (This should only occur if
 521                  * the DPT controller is in a NON PC (PCI?) platform).
 522                  */
 523                 if (dpt_raid_busy(dpt)) {
 524                         printf("dpt%d WARNING: Get_conf() RSUS failed.\n",
 525                                dpt->unit);
 526                         splx(ospl);
 527                         return (0);
 528                 }
 529         }
 530
 531         DptStat_Reset_BUSY(dpt->sp);
 532
 533         /*
 534          * XXXX We might want to do something more clever than aborting at
 535          * this point, like resetting (rebooting) the controller and trying
 536          * again.
 537          */
 538         if ((result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
 539                                             EATA_CMD_DMA_SEND_CP,
 540                                             10000, 0, 0, 0)) != 0) {
 541                 printf("dpt%d WARNING: Get_conf() failed (%d) to send "
 542                        "EATA_CMD_DMA_READ_CONFIG\n",
 543                        dpt->unit, result);
 544                 splx(ospl);
 545                 return (0);
 546         }
 547         /* Wait for two seconds for a response.  This can be slow  */
 548         for (ndx = 0;
 549              (ndx < 20000)
 550              && !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
 551              ndx++) {
 552                 DELAY(50);
 553         }
 554
 555         /* Grab the status and clear interrupts */
 556         status = dpt_inb(dpt, HA_RSTATUS);
 557
 558         splx(ospl);
 559
 560         /*
 561          * Check the status carefully.  Return only if the
 562          * command was successful.
 563          */
 564         if (((status & HA_SERROR) == 0)
 565          && (dpt->sp->hba_stat == 0)
 566          && (dpt->sp->scsi_stat == 0)
 567          && (dpt->sp->residue_len == 0))
 568                 return (0);
 569
 570         if (dpt->sp->scsi_stat == SCSI_STATUS_CHECK_COND)
 571                 return (0);
 572
 573         return (1);
 574 }
 575
 576 /* Detect Cache parameters and size */
 577 static void
 578 dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
 579                  u_int8_t *buff)
 580 {
 581         eata_ccb_t *cp;
 582         u_int8_t   *param;
 583         int         bytes;
 584         int         result;
 585         int         ospl;
 586         int         ndx;
 587         u_int8_t    status;
 588
 589         /*
 590          * Default setting, for best perfromance..
 591          * This is what virtually all cards default to..
 592          */
 593         dpt->cache_type = DPT_CACHE_WRITEBACK;
 594         dpt->cache_size = 0;
 595
 596         cp = &dccb->eata_ccb;
 597         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(dpt->sp));
 598         bzero(buff, 512);
 599
 600         /* Setup the command structure */
 601         cp->Interpret = 1;
 602         cp->DataIn = 1;
 603         cp->Auto_Req_Sen = 1;
 604         cp->reqlen = sizeof(struct scsi_sense_data);
 605
 606         cp->cp_id = 0;          /* who cares?  The HBA will interpret.. */
 607         cp->cp_LUN = 0;         /* In the EATA packet */
 608         cp->cp_lun = 0;         /* In the SCSI command */
 609         cp->cp_channel = 0;
 610
 611         cp->cp_scsi_cmd = EATA_CMD_DMA_SEND_CP;
 612         cp->cp_len = 56;
 613
 614         cp->cp_extent = 0;
 615         cp->cp_page = 0;
 616         cp->cp_identify = 1;
 617         cp->cp_dispri = 1;
 618
 619         /*
 620          * Build the EATA Command Packet structure
 621          * for a Log Sense Command.
 622          */
 623         cp->cp_cdb[0] = 0x4d;
 624         cp->cp_cdb[1] = 0x0;
 625         cp->cp_cdb[2] = 0x40 | 0x33;
 626         cp->cp_cdb[7] = 1;
 627
 628         cp->cp_datalen = htonl(512);
 629
 630         ospl = splcam();
 631         result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
 632                                        EATA_CMD_DMA_SEND_CP,
 633                                        10000, 0, 0, 0);
 634         if (result != 0) {
 635                 printf("dpt%d WARNING: detect_cache() failed (%d) to send "
 636                        "EATA_CMD_DMA_SEND_CP\n", dpt->unit, result);
 637                 splx(ospl);
 638                 return;
 639         }
 640         /* Wait for two seconds for a response.  This can be slow... */
 641         for (ndx = 0;
 642              (ndx < 20000) &&
 643              !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
 644              ndx++) {
 645                 DELAY(50);
 646         }
 647
 648         /* Grab the status and clear interrupts */
 649         status = dpt_inb(dpt, HA_RSTATUS);
 650         splx(ospl);
 651
 652         /*
 653          * Sanity check
 654          */
 655         if (buff[0] != 0x33) {
 656                 return;
 657         }
 658         bytes = DPT_HCP_LENGTH(buff);
 659         param = DPT_HCP_FIRST(buff);
 660
 661         if (DPT_HCP_CODE(param) != 1) {
 662                 /*
 663                  * DPT Log Page layout error
 664                  */
 665                 printf("dpt%d: NOTICE: Log Page (1) layout error\n",
 666                        dpt->unit);
 667                 return;
 668         }
 669         if (!(param[4] & 0x4)) {
 670                 dpt->cache_type = DPT_NO_CACHE;
 671                 return;
 672         }
 673         while (DPT_HCP_CODE(param) != 6) {
 674                 param = DPT_HCP_NEXT(param);
 675                 if ((param < buff)
 676                  || (param >= &buff[bytes])) {
 677                         return;
 678                 }
 679         }
 680
 681         if (param[4] & 0x2) {
 682                 /*
 683                  * Cache disabled
 684                  */
 685                 dpt->cache_type = DPT_NO_CACHE;
 686                 return;
 687         }
 688
 689         if (param[4] & 0x4) {
 690                 dpt->cache_type = DPT_CACHE_WRITETHROUGH;
 691         }
 692
 693         /* XXX This isn't correct.  This log parameter only has two bytes.... */
 694 #if 0
 695         dpt->cache_size = param[5]
 696                         | (param[6] << 8)
 697                         | (param[7] << 16)
 698                         | (param[8] << 24);
 699 #endif
 700 }
 701
 702 static void
 703 dpt_poll(struct cam_sim *sim)
 704 {
 705         dpt_intr(cam_sim_softc(sim));
 706 }
 707
 708 static void
 709 dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 710 {
 711         struct   dpt_ccb *dccb;
 712         union    ccb *ccb;
 713         struct   dpt_softc *dpt;
 714         int      s;
 715
 716         dccb = (struct dpt_ccb *)arg;
 717         ccb = dccb->ccb;
 718         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
 719
 720         if (error != 0) {
 721                 if (error != EFBIG)
 722                         printf("dpt%d: Unexepected error 0x%x returned from "
 723                                "bus_dmamap_load\n", dpt->unit, error);
 724                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 725                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 726                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 727                 }
 728                 dptfreeccb(dpt, dccb);
 729                 xpt_done(ccb);
 730                 return;
 731         }
 732
 733         if (nseg != 0) {
 734                 dpt_sg_t *sg;
 735                 bus_dma_segment_t *end_seg;
 736                 bus_dmasync_op_t op;
 737
 738                 end_seg = dm_segs + nseg;
 739
 740                 /* Copy the segments into our SG list */
 741                 sg = dccb->sg_list;
 742                 while (dm_segs < end_seg) {
 743                         sg->seg_len = htonl(dm_segs->ds_len);
 744                         sg->seg_addr = htonl(dm_segs->ds_addr);
 745                         sg++;
 746                         dm_segs++;
 747                 }
 748
 749                 if (nseg > 1) {
 750                         dccb->eata_ccb.scatter = 1;
 751                         dccb->eata_ccb.cp_dataDMA = dccb->sg_busaddr;
 752                         dccb->eata_ccb.cp_datalen =
 753                             htonl(nseg * sizeof(dpt_sg_t));
 754                 } else {
 755                         dccb->eata_ccb.cp_dataDMA = dccb->sg_list[0].seg_addr;
 756                         dccb->eata_ccb.cp_datalen = dccb->sg_list[0].seg_len;
 757                 }
 758
 759                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 760                         op = BUS_DMASYNC_PREREAD;
 761                 else
 762                         op = BUS_DMASYNC_PREWRITE;
 763
 764                 bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
 765
 766         } else {
 767                 dccb->eata_ccb.cp_dataDMA = 0;
 768                 dccb->eata_ccb.cp_datalen = 0;
 769         }
 770
 771         s = splcam();
 772
 773         /*
 774          * Last time we need to check if this CCB needs to
 775          * be aborted.
 776          */
 777         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 778                 if (nseg != 0)
 779                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
 780                 dptfreeccb(dpt, dccb);
 781                 xpt_done(ccb);
 782                 splx(s);
 783                 return;
 784         }
 785
 786         dccb->state |= DCCB_ACTIVE;
 787         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 788         LIST_INSERT_HEAD(&dpt->pending_ccb_list, &ccb->ccb_h, sim_links.le);
 789         callout_reset(&ccb->ccb_h.timeout_ch, (ccb->ccb_h.timeout * hz) / 1000,
 790                       dpttimeout, dccb);
 791         if (dpt_send_eata_command(dpt, &dccb->eata_ccb,
 792                                   dccb->eata_ccb.cp_busaddr,
 793                                   EATA_CMD_DMA_SEND_CP, 0, 0, 0, 0) != 0) {
 794                 ccb->ccb_h.status = CAM_NO_HBA; /* HBA dead or just busy?? */
 795                 if (nseg != 0)
 796                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
 797                 dptfreeccb(dpt, dccb);
 798                 xpt_done(ccb);
 799         }
 800
 801         splx(s);
 802 }
 803
 804 static void
 805 dpt_action(struct cam_sim *sim, union ccb *ccb)
 806 {
 807         struct    dpt_softc *dpt;
 808
 809         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("dpt_action\n"));
 810
 811         dpt = (struct dpt_softc *)cam_sim_softc(sim);
 812
 813         if ((dpt->state & DPT_HA_SHUTDOWN_ACTIVE) != 0) {
 814                 xpt_print_path(ccb->ccb_h.path);
 815                 printf("controller is shutdown. Aborting CCB.\n");
 816                 ccb->ccb_h.status = CAM_NO_HBA;
 817                 xpt_done(ccb);
 818                 return;
 819         }
 820
 821         switch (ccb->ccb_h.func_code) {
 822         /* Common cases first */
 823         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
 824         {
 825                 struct  ccb_scsiio *csio;
 826                 struct  ccb_hdr *ccbh;
 827                 struct  dpt_ccb *dccb;
 828                 struct  eata_ccb *eccb;
 829
 830                 csio = &ccb->csio;
 831                 ccbh = &ccb->ccb_h;
 832                 /* Max CDB length is 12 bytes */
 833                 if (csio->cdb_len > 12) {
 834                         ccb->ccb_h.status = CAM_REQ_INVALID;
 835                         xpt_done(ccb);
 836                         return;
 837                 }
 838                 if ((dccb = dptgetccb(dpt)) == NULL) {
 839                         int s;
 840
 841                         s = splcam();
 842                         dpt->resource_shortage = 1;
 843                         splx(s);
 844                         xpt_freeze_simq(sim, /*count*/1);
 845                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 846                         xpt_done(ccb);
 847                         return;
 848                 }
 849                 eccb = &dccb->eata_ccb;
 850
 851                 /* Link dccb and ccb so we can find one from the other */
 852                 dccb->ccb = ccb;
 853                 ccb->ccb_h.ccb_dccb_ptr = dccb;
 854                 ccb->ccb_h.ccb_dpt_ptr = dpt;
 855
 856                 /*
 857                  * Explicitly set all flags so that the compiler can
 858                  * be smart about setting them.
 859                  */
 860                 eccb->SCSI_Reset = 0;
 861                 eccb->HBA_Init = 0;
 862                 eccb->Auto_Req_Sen = (ccb->ccb_h.flags & CAM_DIS_AUTOSENSE)
 863                                    ? 0 : 1;
 864                 eccb->scatter = 0;
 865                 eccb->Quick = 0;
 866                 eccb->Interpret =
 867                     ccb->ccb_h.target_id == dpt->hostid[cam_sim_bus(sim)]
 868                     ? 1 : 0;
 869                 eccb->DataOut = (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
 870                 eccb->DataIn = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
 871                 eccb->reqlen = csio->sense_len;
 872                 eccb->cp_id = ccb->ccb_h.target_id;
 873                 eccb->cp_channel = cam_sim_bus(sim);
 874                 eccb->cp_LUN = ccb->ccb_h.target_lun;
 875                 eccb->cp_luntar = 0;
 876                 eccb->cp_dispri = (ccb->ccb_h.flags & CAM_DIS_DISCONNECT)
 877                                 ? 0 : 1;
 878                 eccb->cp_identify = 1;
 879
 880                 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0
 881                  && csio->tag_action != CAM_TAG_ACTION_NONE) {
 882                         eccb->cp_msg[0] = csio->tag_action;
 883                         eccb->cp_msg[1] = dccb->tag;
 884                 } else {
 885                         eccb->cp_msg[0] = 0;
 886                         eccb->cp_msg[1] = 0;
 887                 }
 888                 eccb->cp_msg[2] = 0;
 889
 890                 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
 891                         if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
 892                                 bcopy(csio->cdb_io.cdb_ptr,
 893                                       eccb->cp_cdb, csio->cdb_len);
 894                         } else {
 895                                 /* I guess I could map it in... */
 896                                 ccb->ccb_h.status = CAM_REQ_INVALID;
 897                                 dptfreeccb(dpt, dccb);
 898                                 xpt_done(ccb);
 899                                 return;
 900                         }
 901                 } else {
 902                         bcopy(csio->cdb_io.cdb_bytes,
 903                               eccb->cp_cdb, csio->cdb_len);
 904                 }
 905                 /*
 906                  * If we have any data to send with this command,
 907                  * map it into bus space.
 908                  */
 909                 /* Only use S/G if there is a transfer */
 910                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 911                         if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
 912                                 /*
 913                                  * We've been given a pointer
 914                                  * to a single buffer.
 915                                  */
 916                                 if ((ccbh->flags & CAM_DATA_PHYS) == 0) {
 917                                         int s;
 918                                         int error;
 919
 920                                         s = splsoftvm();
 921                                         error =
 922                                             bus_dmamap_load(dpt->buffer_dmat,
 923                                                             dccb->dmamap,
 924                                                             csio->data_ptr,
 925                                                             csio->dxfer_len,
 926                                                             dptexecuteccb,
 927                                                             dccb, /*flags*/0);
 928                                         if (error == EINPROGRESS) {
 929                                                 /*
 930                                                  * So as to maintain ordering,
 931                                                  * freeze the controller queue
 932                                                  * until our mapping is
 933                                                  * returned.
 934                                                  */
 935                                                 xpt_freeze_simq(sim, 1);
 936                                                 dccb->state |= CAM_RELEASE_SIMQ;
 937                                         }
 938                                         splx(s);
 939                                 } else {
 940                                         struct bus_dma_segment seg;
 941
 942                                         /* Pointer to physical buffer */
 943                                         seg.ds_addr =
 944                                             (bus_addr_t)csio->data_ptr;
 945                                         seg.ds_len = csio->dxfer_len;
 946                                         dptexecuteccb(dccb, &seg, 1, 0);
 947                                 }
 948                         } else {
 949                                 struct bus_dma_segment *segs;
 950
 951                                 if ((ccbh->flags & CAM_DATA_PHYS) != 0)
 952                                         panic("dpt_action - Physical "
 953                                               "segment pointers "
 954                                               "unsupported");
 955
 956                                 if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
 957                                         panic("dpt_action - Virtual "
 958                                               "segment addresses "
 959                                               "unsupported");
 960
 961                                 /* Just use the segments provided */
 962                                 segs = (struct bus_dma_segment *)csio->data_ptr;
 963                                 dptexecuteccb(dccb, segs, csio->sglist_cnt, 0);
 964                         }
 965                 } else {
 966                         /*
 967                          * XXX JGibbs.
 968                          * Does it want them both on or both off?
 969                          * CAM_DIR_NONE is both on, so this code can
 970                          * be removed if this is also what the DPT
 971                          * exptects.
 972                          */
 973                         eccb->DataOut = 0;
 974                         eccb->DataIn = 0;
 975                         dptexecuteccb(dccb, NULL, 0, 0);
 976                 }
 977                 break;
 978         }
 979         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
 980         case XPT_ABORT:                 /* Abort the specified CCB */
 981                 /* XXX Implement */
 982                 ccb->ccb_h.status = CAM_REQ_INVALID;
 983                 xpt_done(ccb);
 984                 break;
 985         case XPT_SET_TRAN_SETTINGS:
 986         {
 987                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 988                 xpt_done(ccb);
 989                 break;
 990         }
 991         case XPT_GET_TRAN_SETTINGS:
 992         /* Get default/user set transfer settings for the target */
 993         {
 994                 struct  ccb_trans_settings *cts;
 995                 u_int   target_mask;
 996
 997                 cts = &ccb->cts;
 998                 target_mask = 0x01 << ccb->ccb_h.target_id;
 999                 if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) {
1000                         cts->flags = CCB_TRANS_DISC_ENB|CCB_TRANS_TAG_ENB;
1001                         cts->bus_width = (dpt->max_id > 7)
1002                                        ? MSG_EXT_WDTR_BUS_8_BIT
1003                                        : MSG_EXT_WDTR_BUS_16_BIT;
1004                         cts->sync_period = 25; /* 10MHz */
1005
1006                         if (cts->sync_period != 0)
1007                                 cts->sync_offset = 15;
1008
1009                         cts->valid = CCB_TRANS_SYNC_RATE_VALID
1010                                    | CCB_TRANS_SYNC_OFFSET_VALID
1011                                    | CCB_TRANS_BUS_WIDTH_VALID
1012                                    | CCB_TRANS_DISC_VALID
1013                                    | CCB_TRANS_TQ_VALID;
1014                         ccb->ccb_h.status = CAM_REQ_CMP;
1015                 } else {
1016                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1017                 }
1018                 xpt_done(ccb);
1019                 break;
1020         }
1021         case XPT_CALC_GEOMETRY:
1022         {
1023                 struct    ccb_calc_geometry *ccg;
1024                 u_int32_t size_mb;
1025                 u_int32_t secs_per_cylinder;
1026                 int       extended;
1027
1028                 /*
1029                  * XXX Use Adaptec translation until I find out how to
1030                  *     get this information from the card.
1031                  */
1032                 ccg = &ccb->ccg;
1033                 size_mb = ccg->volume_size
1034                         / ((1024L * 1024L) / ccg->block_size);
1035                 extended = 1;
1036
1037                 if (size_mb > 1024 && extended) {
1038                         ccg->heads = 255;
1039                         ccg->secs_per_track = 63;
1040                 } else {
1041                         ccg->heads = 64;
1042                         ccg->secs_per_track = 32;
1043                 }
1044                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
1045                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
1046                 ccb->ccb_h.status = CAM_REQ_CMP;
1047                 xpt_done(ccb);
1048                 break;
1049         }
1050         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
1051         {
1052                 /* XXX Implement */
1053                 ccb->ccb_h.status = CAM_REQ_CMP;
1054                 xpt_done(ccb);
1055                 break;
1056         }
1057         case XPT_TERM_IO:               /* Terminate the I/O process */
1058                 /* XXX Implement */
1059                 ccb->ccb_h.status = CAM_REQ_INVALID;
1060                 xpt_done(ccb);
1061                 break;
1062         case XPT_PATH_INQ:              /* Path routing inquiry */
1063         {
1064                 struct ccb_pathinq *cpi = &ccb->cpi;
1065
1066                 cpi->version_num = 1;
1067                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
1068                 if (dpt->max_id > 7)
1069                         cpi->hba_inquiry |= PI_WIDE_16;
1070                 cpi->target_sprt = 0;
1071                 cpi->hba_misc = 0;
1072                 cpi->hba_eng_cnt = 0;
1073                 cpi->max_target = dpt->max_id;
1074                 cpi->max_lun = dpt->max_lun;
1075                 cpi->initiator_id = dpt->hostid[cam_sim_bus(sim)];
1076                 cpi->bus_id = cam_sim_bus(sim);
1077                 cpi->base_transfer_speed = 3300;
1078                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1079                 strncpy(cpi->hba_vid, "DPT", HBA_IDLEN);
1080                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1081                 cpi->unit_number = cam_sim_unit(sim);
1082                 cpi->ccb_h.status = CAM_REQ_CMP;
1083                 xpt_done(ccb);
1084                 break;
1085         }
1086         default:
1087                 ccb->ccb_h.status = CAM_REQ_INVALID;
1088                 xpt_done(ccb);
1089                 break;
1090         }
1091 }
1092
1093 /*
1094  * This routine will try to send an EATA command to the DPT HBA.
1095  * It will, by default, try 20,000 times, waiting 50us between tries.
1096  * It returns 0 on success and 1 on failure.
1097  * It is assumed to be called at splcam().
1098  */
1099 static int
1100 dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
1101                       u_int32_t cmd_busaddr, u_int command, u_int retries,
1102                       u_int ifc, u_int code, u_int code2)
1103 {
1104         u_int   loop;
1105
1106         if (!retries)
1107                 retries = 20000;
1108
1109         /*
1110          * I hate this polling nonsense. Wish there was a way to tell the DPT
1111          * to go get commands at its own pace,  or to interrupt when ready.
1112          * In the mean time we will measure how many itterations it really
1113          * takes.
1114          */
1115         for (loop = 0; loop < retries; loop++) {
1116                 if ((dpt_inb(dpt, HA_RAUXSTAT) & HA_ABUSY) == 0)
1117                         break;
1118                 else
1119                         DELAY(50);
1120         }
1121
1122         if (loop < retries) {
1123 #ifdef DPT_MEASURE_PERFORMANCE
1124                 if (loop > dpt->performance.max_eata_tries)
1125                         dpt->performance.max_eata_tries = loop;
1126
1127                 if (loop < dpt->performance.min_eata_tries)
1128                         dpt->performance.min_eata_tries = loop;
1129 #endif
1130         } else {
1131 #ifdef DPT_MEASURE_PERFORMANCE
1132                 ++dpt->performance.command_too_busy;
1133 #endif
1134                 return (1);
1135         }
1136
1137         /* The controller is alive, advance the wedge timer */
1138 #ifdef DPT_RESET_HBA
1139         dpt->last_contact = microtime_now;
1140 #endif
1141
1142         if (cmd_block == NULL)
1143                 cmd_busaddr = 0;
1144 #if (BYTE_ORDER == BIG_ENDIAN)
1145         else {
1146                 cmd_busaddr = ((cmd_busaddr >> 24) & 0xFF)
1147                             | ((cmd_busaddr >> 16) & 0xFF)
1148                             | ((cmd_busaddr >> 8) & 0xFF)
1149                             | (cmd_busaddr & 0xFF);
1150         }
1151 #endif
1152         /* And now the address */
1153         dpt_outl(dpt, HA_WDMAADDR, cmd_busaddr);
1154
1155         if (command == EATA_CMD_IMMEDIATE) {
1156                 if (cmd_block == NULL) {
1157                         dpt_outb(dpt, HA_WCODE2, code2);
1158                         dpt_outb(dpt, HA_WCODE, code);
1159                 }
1160                 dpt_outb(dpt, HA_WIFC, ifc);
1161         }
1162         dpt_outb(dpt, HA_WCOMMAND, command);
1163
1164         return (0);
1165 }
1166
1167
1168 /* ==================== Exported Function definitions =======================*/
1169 dpt_softc_t *
1170 dpt_alloc(device_t dev, bus_space_tag_t tag, bus_space_handle_t bsh)
1171 {
1172         dpt_softc_t     *dpt = device_get_softc(dev);
1173         int    i;
1174
1175         bzero(dpt, sizeof(dpt_softc_t));
1176         dpt->tag = tag;
1177         dpt->bsh = bsh;
1178         dpt->unit = device_get_unit(dev);
1179         SLIST_INIT(&dpt->free_dccb_list);
1180         LIST_INIT(&dpt->pending_ccb_list);
1181         TAILQ_INSERT_TAIL(&dpt_softcs, dpt, links);
1182         for (i = 0; i < MAX_CHANNELS; i++)
1183                 dpt->resetlevel[i] = DPT_HA_OK;
1184
1185 #ifdef DPT_MEASURE_PERFORMANCE
1186         dpt_reset_performance(dpt);
1187 #endif /* DPT_MEASURE_PERFORMANCE */
1188         return (dpt);
1189 }
1190
1191 void
1192 dpt_free(struct dpt_softc *dpt)
1193 {
1194         switch (dpt->init_level) {
1195         default:
1196         case 5:
1197                 bus_dmamap_unload(dpt->dccb_dmat, dpt->dccb_dmamap);
1198         case 4:
1199                 bus_dmamem_free(dpt->dccb_dmat, dpt->dpt_dccbs,
1200                                 dpt->dccb_dmamap);
1201                 bus_dmamap_destroy(dpt->dccb_dmat, dpt->dccb_dmamap);
1202         case 3:
1203                 bus_dma_tag_destroy(dpt->dccb_dmat);
1204         case 2:
1205                 bus_dma_tag_destroy(dpt->buffer_dmat);
1206         case 1:
1207         {
1208                 struct sg_map_node *sg_map;
1209
1210                 while ((sg_map = SLIST_FIRST(&dpt->sg_maps)) != NULL) {
1211                         SLIST_REMOVE_HEAD(&dpt->sg_maps, links);
1212                         bus_dmamap_unload(dpt->sg_dmat,
1213                                           sg_map->sg_dmamap);
1214                         bus_dmamem_free(dpt->sg_dmat, sg_map->sg_vaddr,
1215                                         sg_map->sg_dmamap);
1216                         free(sg_map, M_DEVBUF);
1217                 }
1218                 bus_dma_tag_destroy(dpt->sg_dmat);
1219         }
1220         case 0:
1221                 break;
1222         }
1223         TAILQ_REMOVE(&dpt_softcs, dpt, links);
1224 }
1225
1226 static u_int8_t string_sizes[] =
1227 {
1228         sizeof(((dpt_inq_t*)NULL)->vendor),
1229         sizeof(((dpt_inq_t*)NULL)->modelNum),
1230         sizeof(((dpt_inq_t*)NULL)->firmware),
1231         sizeof(((dpt_inq_t*)NULL)->protocol),
1232 };
1233
1234 int
1235 dpt_init(struct dpt_softc *dpt)
1236 {
1237         dpt_conf_t  conf;
1238         struct      sg_map_node *sg_map;
1239         dpt_ccb_t  *dccb;
1240         u_int8_t   *strp;
1241         int         index;
1242         int         i;
1243         int         retval;
1244
1245         dpt->init_level = 0;
1246         SLIST_INIT(&dpt->sg_maps);
1247
1248 #ifdef DPT_RESET_BOARD
1249         printf("dpt%d: resetting HBA\n", dpt->unit);
1250         dpt_outb(dpt, HA_WCOMMAND, EATA_CMD_RESET);
1251         DELAY(750000);
1252         /* XXX Shouldn't we poll a status register or something??? */
1253 #endif
1254         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
1255         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1256                                /*lowaddr*/BUS_SPACE_MAXADDR,
1257                                /*highaddr*/BUS_SPACE_MAXADDR,
1258                                /*filter*/NULL, /*filterarg*/NULL,
1259                                PAGE_SIZE, /*nsegments*/1,
1260                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1261                                /*flags*/0, &dpt->sg_dmat) != 0) {
1262                 goto error_exit;
1263         }
1264
1265         dpt->init_level++;
1266
1267         /*
1268          * We allocate our DPT ccbs as a contiguous array of bus dma'able
1269          * memory.  To get the allocation size, we need to know how many
1270          * ccbs the card supports.  This requires a ccb.  We solve this
1271          * chicken and egg problem by allocating some re-usable S/G space
1272          * up front, and treating it as our status packet, CCB, and target
1273          * memory space for these commands.
1274          */
1275         sg_map = dptallocsgmap(dpt);
1276         if (sg_map == NULL)
1277                 goto error_exit;
1278
1279         dpt->sp = (volatile dpt_sp_t *)sg_map->sg_vaddr;
1280         dccb = (struct dpt_ccb *)(uintptr_t)(volatile void *)&dpt->sp[1];
1281         bzero(dccb, sizeof(*dccb));
1282         dpt->sp_physaddr = sg_map->sg_physaddr;
1283         dccb->eata_ccb.cp_dataDMA =
1284             htonl(sg_map->sg_physaddr + sizeof(dpt_sp_t) + sizeof(*dccb));
1285         dccb->eata_ccb.cp_busaddr = ~0;
1286         dccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
1287         dccb->eata_ccb.cp_reqDMA = htonl(dpt->sp_physaddr + sizeof(*dccb)
1288                                        + offsetof(struct dpt_ccb, sense_data));
1289
1290         /* Okay.  Fetch our config */
1291         bzero(&dccb[1], sizeof(conf)); /* data area */
1292         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1293                               sizeof(conf), 0xc1, 7, 1);
1294
1295         if (retval != 0) {
1296                 printf("dpt%d: Failed to get board configuration\n", dpt->unit);
1297                 return (retval);
1298         }
1299         bcopy(&dccb[1], &conf, sizeof(conf));
1300
1301         bzero(&dccb[1], sizeof(dpt->board_data));
1302         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1303                               sizeof(dpt->board_data), 0, conf.scsi_id0, 0);
1304         if (retval != 0) {
1305                 printf("dpt%d: Failed to get inquiry information\n", dpt->unit);
1306                 return (retval);
1307         }
1308         bcopy(&dccb[1], &dpt->board_data, sizeof(dpt->board_data));
1309
1310         dpt_detect_cache(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1311                          (u_int8_t *)&dccb[1]);
1312
1313         switch (ntohl(conf.splen)) {
1314         case DPT_EATA_REVA:
1315                 dpt->EATA_revision = 'a';
1316                 break;
1317         case DPT_EATA_REVB:
1318                 dpt->EATA_revision = 'b';
1319                 break;
1320         case DPT_EATA_REVC:
1321                 dpt->EATA_revision = 'c';
1322                 break;
1323         case DPT_EATA_REVZ:
1324                 dpt->EATA_revision = 'z';
1325                 break;
1326         default:
1327                 dpt->EATA_revision = '?';
1328         }
1329
1330         dpt->max_id      = conf.MAX_ID;
1331         dpt->max_lun     = conf.MAX_LUN;
1332         dpt->irq         = conf.IRQ;
1333         dpt->dma_channel = (8 - conf.DMA_channel) & 7;
1334         dpt->channels    = conf.MAX_CHAN + 1;
1335         dpt->state      |= DPT_HA_OK;
1336         if (conf.SECOND)
1337                 dpt->primary = FALSE;
1338         else
1339                 dpt->primary = TRUE;
1340
1341         dpt->more_support = conf.MORE_support;
1342
1343         if (strncmp(dpt->board_data.firmware, "07G0", 4) >= 0)
1344                 dpt->immediate_support = 1;
1345         else
1346                 dpt->immediate_support = 0;
1347
1348         dpt->broken_INQUIRY = FALSE;
1349
1350         dpt->cplen = ntohl(conf.cplen);
1351         dpt->cppadlen = ntohs(conf.cppadlen);
1352         dpt->max_dccbs = ntohs(conf.queuesiz);
1353
1354         if (dpt->max_dccbs > 256) {
1355                 printf("dpt%d: Max CCBs reduced from %d to "
1356                        "256 due to tag algorithm\n", dpt->unit, dpt->max_dccbs);
1357                 dpt->max_dccbs = 256;
1358         }
1359
1360         dpt->hostid[0] = conf.scsi_id0;
1361         dpt->hostid[1] = conf.scsi_id1;
1362         dpt->hostid[2] = conf.scsi_id2;
1363
1364         if (conf.SG_64K)
1365                 dpt->sgsize = 8192;
1366         else
1367                 dpt->sgsize = ntohs(conf.SGsiz);
1368
1369         /* We can only get 64k buffers, so don't bother to waste space. */
1370         if (dpt->sgsize < 17 || dpt->sgsize > 32)
1371                 dpt->sgsize = 32;
1372
1373         if (dpt->sgsize > dpt_max_segs)
1374                 dpt->sgsize = dpt_max_segs;
1375
1376         /* DMA tag for mapping buffers into device visible space. */
1377         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1378                                /*lowaddr*/BUS_SPACE_MAXADDR,
1379                                /*highaddr*/BUS_SPACE_MAXADDR,
1380                                /*filter*/NULL, /*filterarg*/NULL,
1381                                /*maxsize*/MAXBSIZE, /*nsegments*/dpt->sgsize,
1382                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1383                                /*flags*/BUS_DMA_ALLOCNOW,
1384                                &dpt->buffer_dmat) != 0) {
1385                 printf("dpt: bus_dma_tag_create(...,dpt->buffer_dmat) failed\n");
1386                 goto error_exit;
1387         }
1388
1389         dpt->init_level++;
1390
1391         /* DMA tag for our ccb structures and interrupt status packet */
1392         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1393                                /*lowaddr*/BUS_SPACE_MAXADDR,
1394                                /*highaddr*/BUS_SPACE_MAXADDR,
1395                                /*filter*/NULL, /*filterarg*/NULL,
1396                                (dpt->max_dccbs * sizeof(struct dpt_ccb))
1397                                + sizeof(dpt_sp_t),
1398                                /*nsegments*/1,
1399                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1400                                /*flags*/0, &dpt->dccb_dmat) != 0) {
1401                 printf("dpt: bus_dma_tag_create(...,dpt->dccb_dmat) failed\n");
1402                 goto error_exit;
1403         }
1404
1405         dpt->init_level++;
1406
1407         /* Allocation for our ccbs and interrupt status packet */
1408         if (bus_dmamem_alloc(dpt->dccb_dmat, (void **)&dpt->dpt_dccbs,
1409                              BUS_DMA_NOWAIT, &dpt->dccb_dmamap) != 0) {
1410                 printf("dpt: bus_dmamem_alloc(dpt->dccb_dmat,...) failed\n");
1411                 goto error_exit;
1412         }
1413
1414         dpt->init_level++;
1415
1416         /* And permanently map them */
1417         bus_dmamap_load(dpt->dccb_dmat, dpt->dccb_dmamap,
1418                         dpt->dpt_dccbs,
1419                         (dpt->max_dccbs * sizeof(struct dpt_ccb))
1420                         + sizeof(dpt_sp_t),
1421                         dptmapmem, &dpt->dpt_ccb_busbase, /*flags*/0);
1422
1423         /* Clear them out. */
1424         bzero(dpt->dpt_dccbs,
1425               (dpt->max_dccbs * sizeof(struct dpt_ccb)) + sizeof(dpt_sp_t));
1426
1427         dpt->dpt_ccb_busend = dpt->dpt_ccb_busbase;
1428
1429         dpt->sp = (dpt_sp_t*)&dpt->dpt_dccbs[dpt->max_dccbs];
1430         dpt->sp_physaddr = dpt->dpt_ccb_busbase
1431                          + (dpt->max_dccbs * sizeof(dpt_ccb_t));
1432         dpt->init_level++;
1433
1434         /* Allocate our first batch of ccbs */
1435         if (dptallocccbs(dpt) == 0) {
1436                 printf("dpt: dptallocccbs(dpt) == 0\n");
1437                 return (2);
1438         }
1439
1440         /* Prepare for Target Mode */
1441         dpt->target_mode_enabled = 1;
1442
1443         /* Nuke excess spaces from inquiry information */
1444         strp = dpt->board_data.vendor;
1445         for (i = 0; i < sizeof(string_sizes); i++) {
1446                 index = string_sizes[i] - 1;
1447                 while (index && (strp[index] == ' '))
1448                         strp[index--] = '\0';
1449                 strp += string_sizes[i];
1450         }
1451
1452         printf("dpt%d: %.8s %.16s FW Rev. %.4s, ",
1453                dpt->unit, dpt->board_data.vendor,
1454                dpt->board_data.modelNum, dpt->board_data.firmware);
1455
1456         printf("%d channel%s, ", dpt->channels, dpt->channels > 1 ? "s" : "");
1457
1458         if (dpt->cache_type != DPT_NO_CACHE
1459          && dpt->cache_size != 0) {
1460                 printf("%s Cache, ",
1461                        dpt->cache_type == DPT_CACHE_WRITETHROUGH
1462                      ? "Write-Through" : "Write-Back");
1463         }
1464
1465         printf("%d CCBs\n", dpt->max_dccbs);
1466         return (0);
1467
1468 error_exit:
1469         return (1);
1470 }
1471
1472 int
1473 dpt_attach(dpt_softc_t *dpt)
1474 {
1475         struct cam_devq *devq;
1476         int i;
1477
1478         /*
1479          * Create the device queue for our SIM.
1480          */
1481         devq = cam_simq_alloc(dpt->max_dccbs);
1482         if (devq == NULL)
1483                 return (0);
1484
1485         for (i = 0; i < dpt->channels; i++) {
1486                 /*
1487                  * Construct our SIM entry
1488                  */
1489                 dpt->sims[i] = cam_sim_alloc(dpt_action, dpt_poll, "dpt",
1490                                              dpt, dpt->unit, /*untagged*/2,
1491                                              /*tagged*/dpt->max_dccbs, devq);
1492                 if (xpt_bus_register(dpt->sims[i], i) != CAM_SUCCESS) {
1493                         cam_sim_free(dpt->sims[i]);
1494                         break;
1495                 }
1496
1497                 if (xpt_create_path(&dpt->paths[i], /*periph*/NULL,
1498                                     cam_sim_path(dpt->sims[i]),
1499                                     CAM_TARGET_WILDCARD,
1500                                     CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
1501                         xpt_bus_deregister(cam_sim_path(dpt->sims[i]));
1502                         cam_sim_free(dpt->sims[i]);
1503                         break;
1504                 }
1505
1506         }
1507         cam_simq_release(devq);
1508         if (i > 0)
1509                 EVENTHANDLER_REGISTER(shutdown_final, dptshutdown,
1510                                       dpt, SHUTDOWN_PRI_DEFAULT);
1511         return (i);
1512 }
1513
1514
1515 /*
1516  * This is the interrupt handler for the DPT driver.
1517  */
1518 void
1519 dpt_intr(void *arg)
1520 {
1521         dpt_softc_t    *dpt;
1522         dpt_ccb_t      *dccb;
1523         union ccb      *ccb;
1524         u_int           status;
1525         u_int           aux_status;
1526         u_int           hba_stat;
1527         u_int           scsi_stat;
1528         u_int32_t       residue_len;    /* Number of bytes not transferred */
1529
1530         dpt = (dpt_softc_t *)arg;
1531
1532         /* First order of business is to check if this interrupt is for us */
1533         while (((aux_status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ) != 0) {
1534
1535                 /*
1536                  * What we want to do now, is to capture the status, all of it,
1537                  * move it where it belongs, wake up whoever sleeps waiting to
1538                  * process this result, and get out of here.
1539                  */
1540                 if (dpt->sp->ccb_busaddr < dpt->dpt_ccb_busbase
1541                  || dpt->sp->ccb_busaddr >= dpt->dpt_ccb_busend) {
1542                         printf("Encountered bogus status packet\n");
1543                         status = dpt_inb(dpt, HA_RSTATUS);
1544                         return;
1545                 }
1546
1547                 dccb = dptccbptov(dpt, dpt->sp->ccb_busaddr);
1548
1549                 dpt->sp->ccb_busaddr = ~0;
1550
1551                 /* Ignore status packets with EOC not set */
1552                 if (dpt->sp->EOC == 0) {
1553                         printf("dpt%d ERROR: Request %d received with "
1554                                "clear EOC.\n     Marking as LOST.\n",
1555                                dpt->unit, dccb->transaction_id);
1556
1557 #ifdef DPT_HANDLE_TIMEOUTS
1558                         dccb->state |= DPT_CCB_STATE_MARKED_LOST;
1559 #endif
1560                         /* This CLEARS the interrupt! */
1561                         status = dpt_inb(dpt, HA_RSTATUS);
1562                         continue;
1563                 }
1564                 dpt->sp->EOC = 0;
1565
1566                 /*
1567                  * Double buffer the status information so the hardware can
1568                  * work on updating the status packet while we decifer the
1569                  * one we were just interrupted for.
1570                  * According to Mark Salyzyn, we only need few pieces of it.
1571                  */
1572                 hba_stat = dpt->sp->hba_stat;
1573                 scsi_stat = dpt->sp->scsi_stat;
1574                 residue_len = dpt->sp->residue_len;
1575
1576                 /* Clear interrupts, check for error */
1577                 if ((status = dpt_inb(dpt, HA_RSTATUS)) & HA_SERROR) {
1578                         /*
1579                          * Error Condition. Check for magic cookie. Exit
1580                          * this test on earliest sign of non-reset condition
1581                          */
1582
1583                         /* Check that this is not a board reset interrupt */
1584                         if (dpt_just_reset(dpt)) {
1585                                 printf("dpt%d: HBA rebooted.\n"
1586                                        "      All transactions should be "
1587                                        "resubmitted\n",
1588                                        dpt->unit);
1589
1590                                 printf("dpt%d: >>---->>  This is incomplete, "
1591                                        "fix me....  <<----<<", dpt->unit);
1592                                 panic("DPT Rebooted");
1593
1594                         }
1595                 }
1596                 /* Process CCB */
1597                 ccb = dccb->ccb;
1598                 callout_stop(&ccb->ccb_h.timeout_ch);
1599                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1600                         bus_dmasync_op_t op;
1601
1602                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1603                                 op = BUS_DMASYNC_POSTREAD;
1604                         else
1605                                 op = BUS_DMASYNC_POSTWRITE;
1606                         bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
1607                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
1608                 }
1609
1610                 /* Common Case inline... */
1611                 if (hba_stat == HA_NO_ERROR) {
1612                         ccb->csio.scsi_status = scsi_stat;
1613                         ccb->ccb_h.status = 0;
1614                         switch (scsi_stat) {
1615                         case SCSI_STATUS_OK:
1616                                 ccb->ccb_h.status |= CAM_REQ_CMP;
1617                                 break;
1618                         case SCSI_STATUS_CHECK_COND:
1619                         case SCSI_STATUS_CMD_TERMINATED:
1620                                 bcopy(&dccb->sense_data, &ccb->csio.sense_data,
1621                                       ccb->csio.sense_len);
1622                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
1623                                 /* FALLTHROUGH */
1624                         default:
1625                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
1626                                 /* XXX Freeze DevQ */
1627                                 break;
1628                         }
1629                         ccb->csio.resid = residue_len;
1630                         dptfreeccb(dpt, dccb);
1631                         xpt_done(ccb);
1632                 } else {
1633                         dptprocesserror(dpt, dccb, ccb, hba_stat, scsi_stat,
1634                                         residue_len);
1635                 }
1636         }
1637 }
1638
1639 static void
1640 dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb, union ccb *ccb,
1641                 u_int hba_stat, u_int scsi_stat, u_int32_t resid)
1642 {
1643         ccb->csio.resid = resid;
1644         switch (hba_stat) {
1645         case HA_ERR_SEL_TO:
1646                 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
1647                 break;
1648         case HA_ERR_CMD_TO:
1649                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1650                 break;
1651         case HA_SCSIBUS_RESET:
1652         case HA_HBA_POWER_UP:   /* Similar effect to a bus reset??? */
1653                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
1654                 break;
1655         case HA_CP_ABORTED:
1656         case HA_CP_RESET:       /* XXX ??? */
1657         case HA_CP_ABORT_NA:    /* XXX ??? */
1658         case HA_CP_RESET_NA:    /* XXX ??? */
1659                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)
1660                         ccb->ccb_h.status = CAM_REQ_ABORTED;
1661                 break;
1662         case HA_PCI_PARITY:
1663         case HA_PCI_MABORT:
1664         case HA_PCI_TABORT:
1665         case HA_PCI_STABORT:
1666         case HA_BUS_PARITY:
1667         case HA_PARITY_ERR:
1668         case HA_ECC_ERR:
1669                 ccb->ccb_h.status = CAM_UNCOR_PARITY;
1670                 break;
1671         case HA_UNX_MSGRJCT:
1672                 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
1673                 break;
1674         case HA_UNX_BUSPHASE:
1675                 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
1676                 break;
1677         case HA_UNX_BUS_FREE:
1678                 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
1679                 break;
1680         case HA_SCSI_HUNG:
1681         case HA_RESET_STUCK:
1682                 /*
1683                  * Dead???  Can the controller get unstuck
1684                  * from these conditions
1685                  */
1686                 ccb->ccb_h.status = CAM_NO_HBA;
1687                 break;
1688         case HA_RSENSE_FAIL:
1689                 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
1690                 break;
1691         default:
1692                 printf("dpt%d: Undocumented Error %x\n", dpt->unit, hba_stat);
1693                 printf("Please mail this message to shimon@simon-shapiro.org\n");
1694                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1695                 break;
1696         }
1697         dptfreeccb(dpt, dccb);
1698         xpt_done(ccb);
1699 }
1700
1701 static void
1702 dpttimeout(void *arg)
1703 {
1704         struct dpt_ccb   *dccb;
1705         union  ccb       *ccb;
1706         struct dpt_softc *dpt;
1707         int               s;
1708
1709         dccb = (struct dpt_ccb *)arg;
1710         ccb = dccb->ccb;
1711         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
1712         xpt_print_path(ccb->ccb_h.path);
1713         printf("CCB %p - timed out\n", (void *)dccb);
1714
1715         s = splcam();
1716
1717         /*
1718          * Try to clear any pending jobs.  FreeBSD will loose interrupts,
1719          * leaving the controller suspended, and commands timed-out.
1720          * By calling the interrupt handler, any command thus stuck will be
1721          * completed.
1722          */
1723         dpt_intr(dpt);
1724
1725         if ((dccb->state & DCCB_ACTIVE) == 0) {
1726                 xpt_print_path(ccb->ccb_h.path);
1727                 printf("CCB %p - timed out CCB already completed\n",
1728                        (void *)dccb);
1729                 splx(s);
1730                 return;
1731         }
1732
1733         /* Abort this particular command.  Leave all others running */
1734         dpt_send_immediate(dpt, &dccb->eata_ccb, dccb->eata_ccb.cp_busaddr,
1735                            /*retries*/20000, EATA_SPECIFIC_ABORT, 0, 0);
1736         ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1737         splx(s);
1738 }
1739
1740 /*
1741  * Shutdown the controller and ensure that the cache is completely flushed.
1742  * Called from the shutdown_final event after all disk access has completed.
1743  */
1744 static void
1745 dptshutdown(void *arg, int howto)
1746 {
1747         dpt_softc_t *dpt;
1748
1749         dpt = (dpt_softc_t *)arg;
1750
1751         printf("dpt%d: Shutting down (mode %x) HBA.     Please wait...\n",
1752                dpt->unit, howto);
1753
1754         /*
1755          * What we do for a shutdown, is give the DPT early power loss warning
1756          */
1757         dpt_send_immediate(dpt, NULL, 0, EATA_POWER_OFF_WARN, 0, 0, 0);
1758         DELAY(1000 * 1000 * 5);
1759         printf("dpt%d: Controller was warned of shutdown and is now "
1760                "disabled\n", dpt->unit);
1761 }
1762
1763 /*============================================================================*/
1764
1765 #if 0
1766 #ifdef DPT_RESET_HBA
1767
1768 /*
1769 **      Function name : dpt_reset_hba
1770 **
1771 **      Description : Reset the HBA and properly discard all pending work
1772 **      Input :       Softc
1773 **      Output :      Nothing
1774 */
1775 static void
1776 dpt_reset_hba(dpt_softc_t *dpt)
1777 {
1778         eata_ccb_t       *ccb;
1779         int               ospl;
1780         dpt_ccb_t         dccb, *dccbp;
1781         int               result;
1782         struct scsi_xfer *xs;
1783
1784         /* Prepare a control block.  The SCSI command part is immaterial */
1785         dccb.xs = NULL;
1786         dccb.flags = 0;
1787         dccb.state = DPT_CCB_STATE_NEW;
1788         dccb.std_callback = NULL;
1789         dccb.wrbuff_callback = NULL;
1790
1791         ccb = &dccb.eata_ccb;
1792         ccb->CP_OpCode = EATA_CMD_RESET;
1793         ccb->SCSI_Reset = 0;
1794         ccb->HBA_Init = 1;
1795         ccb->Auto_Req_Sen = 1;
1796         ccb->cp_id = 0; /* Should be ignored */
1797         ccb->DataIn = 1;
1798         ccb->DataOut = 0;
1799         ccb->Interpret = 1;
1800         ccb->reqlen = htonl(sizeof(struct scsi_sense_data));
1801         ccb->cp_statDMA = htonl(vtophys(&ccb->cp_statDMA));
1802         ccb->cp_reqDMA = htonl(vtophys(&ccb->cp_reqDMA));
1803         ccb->cp_viraddr = (u_int32_t) & ccb;
1804
1805         ccb->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1806         ccb->cp_scsi_cmd = 0;  /* Should be ignored */
1807
1808         /* Lock up the submitted queue.  We are very persistant here */
1809         ospl = splcam();
1810         while (dpt->queue_status & DPT_SUBMITTED_QUEUE_ACTIVE) {
1811                 DELAY(100);
1812         }
1813
1814         dpt->queue_status |= DPT_SUBMITTED_QUEUE_ACTIVE;
1815         splx(ospl);
1816
1817         /* Send the RESET message */
1818         if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1819                                             EATA_CMD_RESET, 0, 0, 0, 0)) != 0) {
1820                 printf("dpt%d: Failed to send the RESET message.\n"
1821                        "      Trying cold boot (ouch!)\n", dpt->unit);
1822
1823
1824                 if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1825                                                     EATA_COLD_BOOT, 0, 0,
1826                                                     0, 0)) != 0) {
1827                         panic("dpt%d:  Faild to cold boot the HBA\n",
1828                               dpt->unit);
1829                 }
1830 #ifdef DPT_MEASURE_PERFORMANCE
1831                 dpt->performance.cold_boots++;
1832 #endif /* DPT_MEASURE_PERFORMANCE */
1833         }
1834
1835 #ifdef DPT_MEASURE_PERFORMANCE
1836         dpt->performance.warm_starts++;
1837 #endif /* DPT_MEASURE_PERFORMANCE */
1838
1839         printf("dpt%d:  Aborting pending requests.  O/S should re-submit\n",
1840                dpt->unit);
1841
1842         while ((dccbp = TAILQ_FIRST(&dpt->completed_ccbs)) != NULL) {
1843                 struct scsi_xfer *xs = dccbp->xs;
1844
1845                 /* Not all transactions have xs structs */
1846                 if (xs != NULL) {
1847                         /* Tell the kernel proper this did not complete well */
1848                         xs->error |= XS_SELTIMEOUT;
1849                         xs->flags |= SCSI_ITSDONE;
1850                         scsi_done(xs);
1851                 }
1852
1853                 dpt_Qremove_submitted(dpt, dccbp);
1854
1855                 /* Remember, Callbacks are NOT in the standard queue */
1856                 if (dccbp->std_callback != NULL) {
1857                         (dccbp->std_callback)(dpt, dccbp->eata_ccb.cp_channel,
1858                                                dccbp);
1859                 } else {
1860                         ospl = splcam();
1861                         dpt_Qpush_free(dpt, dccbp);
1862                         splx(ospl);
1863                 }
1864         }
1865
1866         printf("dpt%d: reset done aborting all pending commands\n", dpt->unit);
1867         dpt->queue_status &= ~DPT_SUBMITTED_QUEUE_ACTIVE;
1868 }
1869
1870 #endif /* DPT_RESET_HBA */
1871
1872 /*
1873  * Build a Command Block for target mode READ/WRITE BUFFER,
1874  * with the ``sync'' bit ON.
1875  *
1876  * Although the length and offset are 24 bit fields in the command, they cannot
1877  * exceed 8192 bytes, so we take them as short integers andcheck their range.
1878  * If they are sensless, we round them to zero offset, maximum length and
1879  * complain.
1880  */
1881
1882 static void
1883 dpt_target_ccb(dpt_softc_t * dpt, int bus, u_int8_t target, u_int8_t lun,
1884                dpt_ccb_t * ccb, int mode, u_int8_t command,
1885                u_int16_t length, u_int16_t offset)
1886 {
1887         eata_ccb_t     *cp;
1888         int             ospl;
1889
1890         if ((length + offset) > DPT_MAX_TARGET_MODE_BUFFER_SIZE) {
1891                 printf("dpt%d:  Length of %d, and offset of %d are wrong\n",
1892                        dpt->unit, length, offset);
1893                 length = DPT_MAX_TARGET_MODE_BUFFER_SIZE;
1894                 offset = 0;
1895         }
1896         ccb->xs = NULL;
1897         ccb->flags = 0;
1898         ccb->state = DPT_CCB_STATE_NEW;
1899         ccb->std_callback = (ccb_callback) dpt_target_done;
1900         ccb->wrbuff_callback = NULL;
1901
1902         cp = &ccb->eata_ccb;
1903         cp->CP_OpCode = EATA_CMD_DMA_SEND_CP;
1904         cp->SCSI_Reset = 0;
1905         cp->HBA_Init = 0;
1906         cp->Auto_Req_Sen = 1;
1907         cp->cp_id = target;
1908         cp->DataIn = 1;
1909         cp->DataOut = 0;
1910         cp->Interpret = 0;
1911         cp->reqlen = htonl(sizeof(struct scsi_sense_data));
1912         cp->cp_statDMA = htonl(vtophys(&cp->cp_statDMA));
1913         cp->cp_reqDMA = htonl(vtophys(&cp->cp_reqDMA));
1914         cp->cp_viraddr = (u_int32_t) & ccb;
1915
1916         cp->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1917
1918         cp->cp_scsi_cmd = command;
1919         cp->cp_cdb[1] = (u_int8_t) (mode & SCSI_TM_MODE_MASK);
1920         cp->cp_lun = lun;       /* Order is important here! */
1921         cp->cp_cdb[2] = 0x00;   /* Buffer Id, only 1 :-( */
1922         cp->cp_cdb[3] = (length >> 16) & 0xFF;  /* Buffer offset MSB */
1923         cp->cp_cdb[4] = (length >> 8) & 0xFF;
1924         cp->cp_cdb[5] = length & 0xFF;
1925         cp->cp_cdb[6] = (length >> 16) & 0xFF;  /* Length MSB */
1926         cp->cp_cdb[7] = (length >> 8) & 0xFF;
1927         cp->cp_cdb[8] = length & 0xFF;  /* Length LSB */
1928         cp->cp_cdb[9] = 0;      /* No sync, no match bits */
1929
1930         /*
1931          * This could be optimized to live in dpt_register_buffer.
1932          * We keep it here, just in case the kernel decides to reallocate pages
1933          */
1934         if (dpt_scatter_gather(dpt, ccb, DPT_RW_BUFFER_SIZE,
1935                                dpt->rw_buffer[bus][target][lun])) {
1936                 printf("dpt%d: Failed to setup Scatter/Gather for "
1937                        "Target-Mode buffer\n", dpt->unit);
1938         }
1939 }
1940
1941 /* Setup a target mode READ command */
1942
1943 static void
1944 dpt_set_target(int redo, dpt_softc_t * dpt,
1945                u_int8_t bus, u_int8_t target, u_int8_t lun, int mode,
1946                u_int16_t length, u_int16_t offset, dpt_ccb_t * ccb)
1947 {
1948         int ospl;
1949
1950         if (dpt->target_mode_enabled) {
1951                 ospl = splcam();
1952
1953                 if (!redo)
1954                         dpt_target_ccb(dpt, bus, target, lun, ccb, mode,
1955                                        SCSI_TM_READ_BUFFER, length, offset);
1956
1957                 ccb->transaction_id = ++dpt->commands_processed;
1958
1959 #ifdef DPT_MEASURE_PERFORMANCE
1960                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
1961                 ccb->command_started = microtime_now;
1962 #endif
1963                 dpt_Qadd_waiting(dpt, ccb);
1964                 dpt_sched_queue(dpt);
1965
1966                 splx(ospl);
1967         } else {
1968                 printf("dpt%d:  Target Mode Request, but Target Mode is OFF\n",
1969                        dpt->unit);
1970         }
1971 }
1972
1973 /*
1974  * Schedule a buffer to be sent to another target.
1975  * The work will be scheduled and the callback provided will be called when
1976  * the work is actually done.
1977  *
1978  * Please NOTE:  ``Anyone'' can send a buffer, but only registered clients
1979  * get notified of receipt of buffers.
1980  */
1981
1982 int
1983 dpt_send_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
1984                 u_int8_t mode, u_int16_t length, u_int16_t offset, void *data,
1985                 buff_wr_done callback)
1986 {
1987         dpt_softc_t    *dpt;
1988         dpt_ccb_t      *ccb = NULL;
1989         int             ospl;
1990
1991         /* This is an external call.  Be a bit paranoid */
1992         for (dpt = TAILQ_FIRST(&dpt_softc_list);
1993              dpt != NULL;
1994              dpt = TAILQ_NEXT(dpt, links)) {
1995                 if (dpt->unit == unit)
1996                         goto valid_unit;
1997         }
1998
1999         return (INVALID_UNIT);
2000
2001 valid_unit:
2002
2003         if (dpt->target_mode_enabled) {
2004                 if ((channel >= dpt->channels) || (target > dpt->max_id) ||
2005                     (lun > dpt->max_lun)) {
2006                         return (INVALID_SENDER);
2007                 }
2008                 if ((dpt->rw_buffer[channel][target][lun] == NULL) ||
2009                     (dpt->buffer_receiver[channel][target][lun] == NULL))
2010                         return (NOT_REGISTERED);
2011
2012                 ospl = splsoftcam();
2013                 /* Process the free list */
2014                 if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2015                         printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2016                                "             Please try later\n",
2017                                dpt->unit);
2018                         splx(ospl);
2019                         return (NO_RESOURCES);
2020                 }
2021                 /* Now grab the newest CCB */
2022                 if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2023                         splx(ospl);
2024                         panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2025                 }
2026                 splx(ospl);
2027
2028                 bcopy(dpt->rw_buffer[channel][target][lun] + offset, data, length);
2029                 dpt_target_ccb(dpt, channel, target, lun, ccb, mode,
2030                                            SCSI_TM_WRITE_BUFFER,
2031                                            length, offset);
2032                 ccb->std_callback = (ccb_callback) callback; /* Potential trouble */
2033
2034                 ospl = splcam();
2035                 ccb->transaction_id = ++dpt->commands_processed;
2036
2037 #ifdef DPT_MEASURE_PERFORMANCE
2038                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
2039                 ccb->command_started = microtime_now;
2040 #endif
2041                 dpt_Qadd_waiting(dpt, ccb);
2042                 dpt_sched_queue(dpt);
2043
2044                 splx(ospl);
2045                 return (0);
2046         }
2047         return (DRIVER_DOWN);
2048 }
2049
2050 static void
2051 dpt_target_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2052 {
2053         int             ospl;
2054         eata_ccb_t     *cp;
2055
2056         cp = &ccb->eata_ccb;
2057
2058         /*
2059          * Remove the CCB from the waiting queue.
2060          *  We do NOT put it back on the free, etc., queues as it is a special
2061          * ccb, owned by the dpt_softc of this unit.
2062          */
2063         ospl = splsoftcam();
2064         dpt_Qremove_completed(dpt, ccb);
2065         splx(ospl);
2066
2067 #define br_channel           (ccb->eata_ccb.cp_channel)
2068 #define br_target            (ccb->eata_ccb.cp_id)
2069 #define br_lun               (ccb->eata_ccb.cp_LUN)
2070 #define br_index             [br_channel][br_target][br_lun]
2071 #define read_buffer_callback (dpt->buffer_receiver br_index )
2072 #define read_buffer          (dpt->rw_buffer[br_channel][br_target][br_lun])
2073 #define cb(offset)           (ccb->eata_ccb.cp_cdb[offset])
2074 #define br_offset            ((cb(3) << 16) | (cb(4) << 8) | cb(5))
2075 #define br_length            ((cb(6) << 16) | (cb(7) << 8) | cb(8))
2076
2077         /* Different reasons for being here, you know... */
2078         switch (ccb->eata_ccb.cp_scsi_cmd) {
2079         case SCSI_TM_READ_BUFFER:
2080                 if (read_buffer_callback != NULL) {
2081                         /* This is a buffer generated by a kernel process */
2082                         read_buffer_callback(dpt->unit, br_channel,
2083                                              br_target, br_lun,
2084                                              read_buffer,
2085                                              br_offset, br_length);
2086                 } else {
2087                         /*
2088                          * This is a buffer waited for by a user (sleeping)
2089                          * command
2090                          */
2091                         wakeup(ccb);
2092                 }
2093
2094                 /* We ALWAYS re-issue the same command; args are don't-care  */
2095                 dpt_set_target(1, 0, 0, 0, 0, 0, 0, 0, 0);
2096                 break;
2097
2098         case SCSI_TM_WRITE_BUFFER:
2099                 (ccb->wrbuff_callback) (dpt->unit, br_channel, br_target,
2100                                         br_offset, br_length,
2101                                         br_lun, ccb->status_packet.hba_stat);
2102                 break;
2103         default:
2104                 printf("dpt%d:  %s is an unsupported command for target mode\n",
2105                        dpt->unit, scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd));
2106         }
2107         ospl = splsoftcam();
2108         dpt->target_ccb[br_channel][br_target][br_lun] = NULL;
2109         dpt_Qpush_free(dpt, ccb);
2110         splx(ospl);
2111 }
2112
2113
2114 /*
2115  * Use this function to register a client for a buffer read target operation.
2116  * The function you register will be called every time a buffer is received
2117  * by the target mode code.
2118  */
2119 dpt_rb_t
2120 dpt_register_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
2121                     u_int8_t mode, u_int16_t length, u_int16_t offset,
2122                     dpt_rec_buff callback, dpt_rb_op_t op)
2123 {
2124         dpt_softc_t    *dpt;
2125         dpt_ccb_t      *ccb = NULL;
2126         int             ospl;
2127
2128         for (dpt = TAILQ_FIRST(&dpt_softc_list);
2129              dpt != NULL;
2130              dpt = TAILQ_NEXT(dpt, links)) {
2131                 if (dpt->unit == unit)
2132                         goto valid_unit;
2133         }
2134
2135         return (INVALID_UNIT);
2136
2137 valid_unit:
2138
2139         if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
2140                 return (DRIVER_DOWN);
2141
2142         if ((channel > (dpt->channels - 1)) || (target > (dpt->max_id - 1)) ||
2143             (lun > (dpt->max_lun - 1)))
2144                 return (INVALID_SENDER);
2145
2146         if (dpt->buffer_receiver[channel][target][lun] == NULL) {
2147                 if (op == REGISTER_BUFFER) {
2148                         /* Assign the requested callback */
2149                         dpt->buffer_receiver[channel][target][lun] = callback;
2150                         /* Get a CCB */
2151                         ospl = splsoftcam();
2152
2153                         /* Process the free list */
2154                         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2155                                 printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2156                                        "             Please try later\n",
2157                                        dpt->unit);
2158                                 splx(ospl);
2159                                 return (NO_RESOURCES);
2160                         }
2161                         /* Now grab the newest CCB */
2162                         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2163                                 splx(ospl);
2164                                 panic("dpt%d: Got a NULL CCB from pop_free()\n",
2165                                       dpt->unit);
2166                         }
2167                         splx(ospl);
2168
2169                         /* Clean up the leftover of the previous tenant */
2170                         ccb->status = DPT_CCB_STATE_NEW;
2171                         dpt->target_ccb[channel][target][lun] = ccb;
2172
2173                         dpt->rw_buffer[channel][target][lun] =
2174                                 malloc(DPT_RW_BUFFER_SIZE, M_DEVBUF, M_INTWAIT);
2175                         dpt_set_target(0, dpt, channel, target, lun, mode,
2176                                        length, offset, ccb);
2177                         return (SUCCESSFULLY_REGISTERED);
2178                 } else
2179                         return (NOT_REGISTERED);
2180         } else {
2181                 if (op == REGISTER_BUFFER) {
2182                         if (dpt->buffer_receiver[channel][target][lun] == callback)
2183                                 return (ALREADY_REGISTERED);
2184                         else
2185                                 return (REGISTERED_TO_ANOTHER);
2186                 } else {
2187                         if (dpt->buffer_receiver[channel][target][lun] == callback) {
2188                                 dpt->buffer_receiver[channel][target][lun] = NULL;
2189                                 ospl = splsoftcam();
2190                                 dpt_Qpush_free(dpt, ccb);
2191                                 splx(ospl);
2192                                 free(dpt->rw_buffer[channel][target][lun], M_DEVBUF);
2193                                 return (SUCCESSFULLY_REGISTERED);
2194                         } else
2195                                 return (INVALID_CALLBACK);
2196                 }
2197
2198         }
2199 }
2200
2201 /* Return the state of the blinking DPT LED's */
2202 u_int8_t
2203 dpt_blinking_led(dpt_softc_t * dpt)
2204 {
2205         int             ndx;
2206         int             ospl;
2207         u_int32_t       state;
2208         u_int32_t       previous;
2209         u_int8_t        result;
2210
2211         ospl = splcam();
2212
2213         result = 0;
2214
2215         for (ndx = 0, state = 0, previous = 0;
2216              (ndx < 10) && (state != previous);
2217              ndx++) {
2218                 previous = state;
2219                 state = dpt_inl(dpt, 1);
2220         }
2221
2222         if ((state == previous) && (state == DPT_BLINK_INDICATOR))
2223                 result = dpt_inb(dpt, 5);
2224
2225         splx(ospl);
2226         return (result);
2227 }
2228
2229 /*
2230  * Execute a command which did not come from the kernel's SCSI layer.
2231  * The only way to map user commands to bus and target is to comply with the
2232  * standard DPT wire-down scheme:
2233  */
2234 int
2235 dpt_user_cmd(dpt_softc_t * dpt, eata_pt_t * user_cmd,
2236              caddr_t cmdarg, int minor_no)
2237 {
2238         dpt_ccb_t *ccb;
2239         void      *data;
2240         int        channel, target, lun;
2241         int        huh;
2242         int        result;
2243         int        ospl;
2244         int        submitted;
2245
2246         data = NULL;
2247         channel = minor2hba(minor_no);
2248         target = minor2target(minor_no);
2249         lun = minor2lun(minor_no);
2250
2251         if ((channel > (dpt->channels - 1))
2252          || (target > dpt->max_id)
2253          || (lun > dpt->max_lun))
2254                 return (ENXIO);
2255
2256         if (target == dpt->sc_scsi_link[channel].adapter_targ) {
2257                 /* This one is for the controller itself */
2258                 if ((user_cmd->eataID[0] != 'E')
2259                  || (user_cmd->eataID[1] != 'A')
2260                  || (user_cmd->eataID[2] != 'T')
2261                  || (user_cmd->eataID[3] != 'A')) {
2262                         return (ENXIO);
2263                 }
2264         }
2265         /* Get a DPT CCB, so we can prepare a command */
2266         ospl = splsoftcam();
2267
2268         /* Process the free list */
2269         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2270                 printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2271                        "             Please try later\n",
2272                        dpt->unit);
2273                 splx(ospl);
2274                 return (EFAULT);
2275         }
2276         /* Now grab the newest CCB */
2277         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2278                 splx(ospl);
2279                 panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2280         } else {
2281                 splx(ospl);
2282                 /* Clean up the leftover of the previous tenant */
2283                 ccb->status = DPT_CCB_STATE_NEW;
2284         }
2285
2286         bcopy((caddr_t) & user_cmd->command_packet, (caddr_t) & ccb->eata_ccb,
2287               sizeof(eata_ccb_t));
2288
2289         /* We do not want to do user specified scatter/gather.  Why?? */
2290         if (ccb->eata_ccb.scatter == 1)
2291                 return (EINVAL);
2292
2293         ccb->eata_ccb.Auto_Req_Sen = 1;
2294         ccb->eata_ccb.reqlen = htonl(sizeof(struct scsi_sense_data));
2295         ccb->eata_ccb.cp_datalen = htonl(sizeof(ccb->eata_ccb.cp_datalen));
2296         ccb->eata_ccb.cp_dataDMA = htonl(vtophys(ccb->eata_ccb.cp_dataDMA));
2297         ccb->eata_ccb.cp_statDMA = htonl(vtophys(&ccb->eata_ccb.cp_statDMA));
2298         ccb->eata_ccb.cp_reqDMA = htonl(vtophys(&ccb->eata_ccb.cp_reqDMA));
2299         ccb->eata_ccb.cp_viraddr = (u_int32_t) & ccb;
2300
2301         if (ccb->eata_ccb.DataIn || ccb->eata_ccb.DataOut) {
2302                 /* Data I/O is involved in this command.  Alocate buffer */
2303                 if (ccb->eata_ccb.cp_datalen > PAGE_SIZE) {
2304                         data = contigmalloc(ccb->eata_ccb.cp_datalen,
2305                                             M_TEMP, M_WAITOK, 0, ~0,
2306                                             ccb->eata_ccb.cp_datalen,
2307                                             0x10000);
2308                 } else {
2309                         data = malloc(ccb->eata_ccb.cp_datalen, M_TEMP,
2310                                       M_WAITOK);
2311                 }
2312
2313                 if (data == NULL) {
2314                         printf("dpt%d: Cannot allocate %d bytes "
2315                                "for EATA command\n", dpt->unit,
2316                                ccb->eata_ccb.cp_datalen);
2317                         return (EFAULT);
2318                 }
2319 #define usr_cmd_DMA (caddr_t)user_cmd->command_packet.cp_dataDMA
2320                 if (ccb->eata_ccb.DataIn == 1) {
2321                         if (copyin(usr_cmd_DMA,
2322                                    data, ccb->eata_ccb.cp_datalen) == -1)
2323                                 return (EFAULT);
2324                 }
2325         } else {
2326                 /* No data I/O involved here.  Make sure the DPT knows that */
2327                 ccb->eata_ccb.cp_datalen = 0;
2328                 data = NULL;
2329         }
2330
2331         if (ccb->eata_ccb.FWNEST == 1)
2332                 ccb->eata_ccb.FWNEST = 0;
2333
2334         if (ccb->eata_ccb.cp_datalen != 0) {
2335                 if (dpt_scatter_gather(dpt, ccb, ccb->eata_ccb.cp_datalen,
2336                                        data) != 0) {
2337                         if (data != NULL)
2338                                 free(data, M_TEMP);
2339                         return (EFAULT);
2340                 }
2341         }
2342         /**
2343          * We are required to quiet a SCSI bus.
2344          * since we do not queue comands on a bus basis,
2345          * we wait for ALL commands on a controller to complete.
2346          * In the mean time, sched_queue() will not schedule new commands.
2347          */
2348         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2349             && (ccb->eata_ccb.cp_cdb[2] == BUS_QUIET)) {
2350                 /* We wait for ALL traffic for this HBa to subside */
2351                 ospl = splsoftcam();
2352                 dpt->state |= DPT_HA_QUIET;
2353                 splx(ospl);
2354
2355                 while ((submitted = dpt->submitted_ccbs_count) != 0) {
2356                         huh = tsleep((void *) dpt, PCATCH, "dptqt", 100 * hz);
2357                         switch (huh) {
2358                         case 0:
2359                                 /* Wakeup call received */
2360                                 break;
2361                         case EWOULDBLOCK:
2362                                 /* Timer Expired */
2363                                 break;
2364                         default:
2365                                 /* anything else */
2366                                 break;
2367                         }
2368                 }
2369         }
2370         /* Resume normal operation */
2371         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2372             && (ccb->eata_ccb.cp_cdb[2] == BUS_UNQUIET)) {
2373                 ospl = splsoftcam();
2374                 dpt->state &= ~DPT_HA_QUIET;
2375                 splx(ospl);
2376         }
2377         /**
2378          * Schedule the command and submit it.
2379          * We bypass dpt_sched_queue, as it will block on DPT_HA_QUIET
2380          */
2381         ccb->xs = NULL;
2382         ccb->flags = 0;
2383         ccb->eata_ccb.Auto_Req_Sen = 1; /* We always want this feature */
2384
2385         ccb->transaction_id = ++dpt->commands_processed;
2386         ccb->std_callback = (ccb_callback) dpt_user_cmd_done;
2387         ccb->result = (u_int32_t) & cmdarg;
2388         ccb->data = data;
2389
2390 #ifdef DPT_MEASURE_PERFORMANCE
2391         ++dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd];
2392         ccb->command_started = microtime_now;
2393 #endif
2394         ospl = splcam();
2395         dpt_Qadd_waiting(dpt, ccb);
2396         splx(ospl);
2397
2398         dpt_sched_queue(dpt);
2399
2400         /* Wait for the command to complete */
2401         (void) tsleep((void *) ccb, PCATCH, "dptucw", 100 * hz);
2402
2403         /* Free allocated memory */
2404         if (data != NULL)
2405                 free(data, M_TEMP);
2406
2407         return (0);
2408 }
2409
2410 static void
2411 dpt_user_cmd_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2412 {
2413         int             ospl = splsoftcam();
2414         u_int32_t       result;
2415         caddr_t         cmd_arg;
2416
2417         /**
2418          * If Auto Request Sense is on, copyout the sense struct
2419          */
2420 #define usr_pckt_DMA    (caddr_t)(intptr_t)ntohl(ccb->eata_ccb.cp_reqDMA)
2421 #define usr_pckt_len    ntohl(ccb->eata_ccb.cp_datalen)
2422         if (ccb->eata_ccb.Auto_Req_Sen == 1) {
2423                 if (copyout((caddr_t) & ccb->sense_data, usr_pckt_DMA,
2424                             sizeof(struct scsi_sense_data))) {
2425                         ccb->result = EFAULT;
2426                         dpt_Qpush_free(dpt, ccb);
2427                         splx(ospl);
2428                         wakeup(ccb);
2429                         return;
2430                 }
2431         }
2432         /* If DataIn is on, copyout the data */
2433         if ((ccb->eata_ccb.DataIn == 1)
2434             && (ccb->status_packet.hba_stat == HA_NO_ERROR)) {
2435                 if (copyout(ccb->data, usr_pckt_DMA, usr_pckt_len)) {
2436                         dpt_Qpush_free(dpt, ccb);
2437                         ccb->result = EFAULT;
2438
2439                         splx(ospl);
2440                         wakeup(ccb);
2441                         return;
2442                 }
2443         }
2444         /* Copyout the status */
2445         result = ccb->status_packet.hba_stat;
2446         cmd_arg = (caddr_t) ccb->result;
2447
2448         if (copyout((caddr_t) & result, cmd_arg, sizeof(result))) {
2449                 dpt_Qpush_free(dpt, ccb);
2450                 ccb->result = EFAULT;
2451                 splx(ospl);
2452                 wakeup(ccb);
2453                 return;
2454         }
2455         /* Put the CCB back in the freelist */
2456         ccb->state |= DPT_CCB_STATE_COMPLETED;
2457         dpt_Qpush_free(dpt, ccb);
2458
2459         /* Free allocated memory */
2460         splx(ospl);
2461         return;
2462 }
2463
2464 #ifdef DPT_HANDLE_TIMEOUTS
2465 /**
2466  * This function walks down the SUBMITTED queue.
2467  * Every request that is too old gets aborted and marked.
2468  * Since the DPT will complete (interrupt) immediately (what does that mean?),
2469  * We just walk the list, aborting old commands and marking them as such.
2470  * The dpt_complete function will get rid of the that were interrupted in the
2471  * normal manner.
2472  *
2473  * This function needs to run at splcam(), as it interacts with the submitted
2474  * queue, as well as the completed and free queues.  Just like dpt_intr() does.
2475  * To run it at any ISPL other than that of dpt_intr(), will mean that dpt_intr
2476  * willbe able to pre-empt it, grab a transaction in progress (towards
2477  * destruction) and operate on it.  The state of this transaction will be not
2478  * very clear.
2479  * The only other option, is to lock it only as long as necessary but have
2480  * dpt_intr() spin-wait on it. In a UP environment this makes no sense and in
2481  * a SMP environment, the advantage is dubvious for a function that runs once
2482  * every ten seconds for few microseconds and, on systems with healthy
2483  * hardware, does not do anything anyway.
2484  */
2485
2486 static void
2487 dpt_handle_timeouts(dpt_softc_t * dpt)
2488 {
2489         dpt_ccb_t      *ccb;
2490         int             ospl;
2491
2492         ospl = splcam();
2493
2494         if (dpt->state & DPT_HA_TIMEOUTS_ACTIVE) {
2495                 printf("dpt%d WARNING: Timeout Handling Collision\n",
2496                        dpt->unit);
2497                 splx(ospl);
2498                 return;
2499         }
2500         dpt->state |= DPT_HA_TIMEOUTS_ACTIVE;
2501
2502         /* Loop through the entire submitted queue, looking for lost souls */
2503         for (ccb = TAILQ_FIRST(&dpt->submitted_ccbs);
2504              ccb != NULL;
2505              ccb = TAILQ_NEXT(ccb, links)) {
2506                 struct scsi_xfer *xs;
2507                 u_int32_t       age, max_age;
2508
2509                 xs = ccb->xs;
2510                 age = dpt_time_delta(ccb->command_started, microtime_now);
2511
2512 #define TenSec  10000000
2513
2514                 if (xs == NULL) {       /* Local, non-kernel call */
2515                         max_age = TenSec;
2516                 } else {
2517                         max_age = (((xs->timeout * (dpt->submitted_ccbs_count
2518                                                     + DPT_TIMEOUT_FACTOR))
2519                                     > TenSec)
2520                                  ? (xs->timeout * (dpt->submitted_ccbs_count
2521                                                    + DPT_TIMEOUT_FACTOR))
2522                                    : TenSec);
2523                 }
2524
2525                 /*
2526                  * If a transaction is marked lost and is TWICE as old as we
2527                  * care, then, and only then do we destroy it!
2528                  */
2529                 if (ccb->state & DPT_CCB_STATE_MARKED_LOST) {
2530                         /* Remember who is next */
2531                         if (age > (max_age * 2)) {
2532                                 dpt_Qremove_submitted(dpt, ccb);
2533                                 ccb->state &= ~DPT_CCB_STATE_MARKED_LOST;
2534                                 ccb->state |= DPT_CCB_STATE_ABORTED;
2535 #define cmd_name scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd)
2536                                 if (ccb->retries++ > DPT_RETRIES) {
2537                                         printf("dpt%d ERROR: Destroying stale "
2538                                                "%d (%s)\n"
2539                                                "                on "
2540                                                "c%db%dt%du%d (%d/%d)\n",
2541                                              dpt->unit, ccb->transaction_id,
2542                                                cmd_name,
2543                                                dpt->unit,
2544                                                ccb->eata_ccb.cp_channel,
2545                                                ccb->eata_ccb.cp_id,
2546                                                ccb->eata_ccb.cp_LUN, age,
2547                                                ccb->retries);
2548 #define send_ccb &ccb->eata_ccb
2549 #define ESA      EATA_SPECIFIC_ABORT
2550                                         (void) dpt_send_immediate(dpt,
2551                                                                   send_ccb,
2552                                                                   ESA,
2553                                                                   0, 0);
2554                                         dpt_Qpush_free(dpt, ccb);
2555
2556                                         /* The SCSI layer should re-try */
2557                                         xs->error |= XS_TIMEOUT;
2558                                         xs->flags |= SCSI_ITSDONE;
2559                                         scsi_done(xs);
2560                                 } else {
2561                                         printf("dpt%d ERROR: Stale %d (%s) on "
2562                                                "c%db%dt%du%d (%d)\n"
2563                                              "          gets another "
2564                                                "chance(%d/%d)\n",
2565                                              dpt->unit, ccb->transaction_id,
2566                                                cmd_name,
2567                                                dpt->unit,
2568                                                ccb->eata_ccb.cp_channel,
2569                                                ccb->eata_ccb.cp_id,
2570                                                ccb->eata_ccb.cp_LUN,
2571                                             age, ccb->retries, DPT_RETRIES);
2572
2573                                         dpt_Qpush_waiting(dpt, ccb);
2574                                         dpt_sched_queue(dpt);
2575                                 }
2576                         }
2577                 } else {
2578                         /*
2579                          * This is a transaction that is not to be destroyed
2580                          * (yet) But it is too old for our liking. We wait as
2581                          * long as the upper layer thinks. Not really, we
2582                          * multiply that by the number of commands in the
2583                          * submitted queue + 1.
2584                          */
2585                         if (!(ccb->state & DPT_CCB_STATE_MARKED_LOST) &&
2586                             (age != ~0) && (age > max_age)) {
2587                                 printf("dpt%d ERROR: Marking %d (%s) on "
2588                                        "c%db%dt%du%d \n"
2589                                        "            as late after %dusec\n",
2590                                        dpt->unit, ccb->transaction_id,
2591                                        cmd_name,
2592                                        dpt->unit, ccb->eata_ccb.cp_channel,
2593                                        ccb->eata_ccb.cp_id,
2594                                        ccb->eata_ccb.cp_LUN, age);
2595                                 ccb->state |= DPT_CCB_STATE_MARKED_LOST;
2596                         }
2597                 }
2598         }
2599
2600         dpt->state &= ~DPT_HA_TIMEOUTS_ACTIVE;
2601         splx(ospl);
2602 }
2603
2604 #endif                          /* DPT_HANDLE_TIMEOUTS */
2605
2606 #endif