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 1.18 2008/05/18 20:30:23 pavalos 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 #include <sys/bus.h>
  58 #include <sys/thread2.h>
  59
  60 #include <machine/clock.h>
  61
  62 #include <bus/cam/cam.h>
  63 #include <bus/cam/cam_ccb.h>
  64 #include <bus/cam/cam_sim.h>
  65 #include <bus/cam/cam_xpt_sim.h>
  66 #include <bus/cam/cam_debug.h>
  67 #include <bus/cam/scsi/scsi_all.h>
  68 #include <bus/cam/scsi/scsi_message.h>
  69
  70 #include <vm/vm.h>
  71 #include <vm/pmap.h>
  72
  73 #include "dpt.h"
  74
  75 /* dpt_isa.c, dpt_eisa.c, and dpt_pci.c need this in a central place */
  76 int dpt_controllers_present;
  77
  78 u_long  dpt_unit;       /* Next unit number to use */
  79
  80 /* The linked list of softc structures */
  81 struct dpt_softc_list dpt_softcs = TAILQ_HEAD_INITIALIZER(dpt_softcs);
  82
  83 #define microtime_now dpt_time_now()
  84
  85 #define dpt_inl(dpt, port)                              \
  86         bus_space_read_4((dpt)->tag, (dpt)->bsh, port)
  87 #define dpt_inb(dpt, port)                              \
  88         bus_space_read_1((dpt)->tag, (dpt)->bsh, port)
  89 #define dpt_outl(dpt, port, value)                      \
  90         bus_space_write_4((dpt)->tag, (dpt)->bsh, port, value)
  91 #define dpt_outb(dpt, port, value)                      \
  92         bus_space_write_1((dpt)->tag, (dpt)->bsh, port, value)
  93
  94 /*
  95  * These will have to be setup by parameters passed at boot/load time. For
  96  * perfromance reasons, we make them constants for the time being.
  97  */
  98 #define dpt_min_segs    DPT_MAX_SEGS
  99 #define dpt_max_segs    DPT_MAX_SEGS
 100
 101 /* Definitions for our use of the SIM private CCB area */
 102 #define ccb_dccb_ptr spriv_ptr0
 103 #define ccb_dpt_ptr spriv_ptr1
 104
 105 /* ================= Private Inline Function declarations ===================*/
 106 static __inline int             dpt_just_reset(dpt_softc_t * dpt);
 107 static __inline int             dpt_raid_busy(dpt_softc_t * dpt);
 108 static __inline int             dpt_pio_wait (u_int32_t, u_int, u_int, u_int);
 109 static __inline int             dpt_wait(dpt_softc_t *dpt, u_int bits,
 110                                          u_int state);
 111 static __inline struct dpt_ccb* dptgetccb(struct dpt_softc *dpt);
 112 static __inline void            dptfreeccb(struct dpt_softc *dpt,
 113                                            struct dpt_ccb *dccb);
 114 static __inline bus_addr_t      dptccbvtop(struct dpt_softc *dpt,
 115                                            struct dpt_ccb *dccb);
 116
 117 static __inline int             dpt_send_immediate(dpt_softc_t *dpt,
 118                                                    eata_ccb_t *cmd_block,
 119                                                    u_int32_t cmd_busaddr,
 120                                                    u_int retries,
 121                                                    u_int ifc, u_int code,
 122                                                    u_int code2);
 123
 124 /* ==================== Private Function declarations =======================*/
 125 static void             dptmapmem(void *arg, bus_dma_segment_t *segs,
 126                                   int nseg, int error);
 127
 128 static struct sg_map_node*
 129                         dptallocsgmap(struct dpt_softc *dpt);
 130
 131 static int              dptallocccbs(dpt_softc_t *dpt);
 132
 133 static int              dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb,
 134                                      u_int32_t dccb_busaddr, u_int size,
 135                                      u_int page, u_int target, int extent);
 136 static void             dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb,
 137                                          u_int32_t dccb_busaddr,
 138                                          u_int8_t *buff);
 139
 140 static void             dpt_poll(struct cam_sim *sim);
 141
 142 static void             dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs,
 143                                       int nseg, int error);
 144
 145 static void             dpt_action(struct cam_sim *sim, union ccb *ccb);
 146
 147 static int              dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd,
 148                                               u_int32_t cmd_busaddr,
 149                                               u_int command, u_int retries,
 150                                               u_int ifc, u_int code,
 151                                               u_int code2);
 152 static void             dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb,
 153                                         union ccb *ccb, u_int hba_stat,
 154                                         u_int scsi_stat, u_int32_t resid);
 155
 156 static void             dpttimeout(void *arg);
 157 static void             dptshutdown(void *arg, int howto);
 158
 159 /* ================= Private Inline Function definitions ====================*/
 160 static __inline int
 161 dpt_just_reset(dpt_softc_t * dpt)
 162 {
 163         if ((dpt_inb(dpt, 2) == 'D')
 164          && (dpt_inb(dpt, 3) == 'P')
 165          && (dpt_inb(dpt, 4) == 'T')
 166          && (dpt_inb(dpt, 5) == 'H'))
 167                 return (1);
 168         else
 169                 return (0);
 170 }
 171
 172 static __inline int
 173 dpt_raid_busy(dpt_softc_t * dpt)
 174 {
 175         if ((dpt_inb(dpt, 0) == 'D')
 176          && (dpt_inb(dpt, 1) == 'P')
 177          && (dpt_inb(dpt, 2) == 'T'))
 178                 return (1);
 179         else
 180                 return (0);
 181 }
 182
 183 static __inline int
 184 dpt_pio_wait (u_int32_t base, u_int reg, u_int bits, u_int state)
 185 {
 186         int   i;
 187         u_int c;
 188
 189         for (i = 0; i < 20000; i++) {   /* wait 20ms for not busy */
 190                 c = inb(base + reg) & bits;
 191                 if (!(c == state))
 192                         return (0);
 193                 else
 194                         DELAY(50);
 195         }
 196         return (-1);
 197 }
 198
 199 static __inline int
 200 dpt_wait(dpt_softc_t *dpt, u_int bits, u_int state)
 201 {
 202         int   i;
 203         u_int c;
 204
 205         for (i = 0; i < 20000; i++) {   /* wait 20ms for not busy */
 206                 c = dpt_inb(dpt, HA_RSTATUS) & bits;
 207                 if (c == state)
 208                         return (0);
 209                 else
 210                         DELAY(50);
 211         }
 212         return (-1);
 213 }
 214
 215 static __inline struct dpt_ccb*
 216 dptgetccb(struct dpt_softc *dpt)
 217 {
 218         struct  dpt_ccb* dccb;
 219
 220         crit_enter();
 221         if ((dccb = SLIST_FIRST(&dpt->free_dccb_list)) != NULL) {
 222                 SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
 223                 dpt->free_dccbs--;
 224         } else if (dpt->total_dccbs < dpt->max_dccbs) {
 225                 dptallocccbs(dpt);
 226                 dccb = SLIST_FIRST(&dpt->free_dccb_list);
 227                 if (dccb == NULL)
 228                         kprintf("dpt%d: Can't malloc DCCB\n", dpt->unit);
 229                 else {
 230                         SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links);
 231                         dpt->free_dccbs--;
 232                 }
 233         }
 234         crit_exit();
 235
 236         return (dccb);
 237 }
 238
 239 static __inline void
 240 dptfreeccb(struct dpt_softc *dpt, struct dpt_ccb *dccb)
 241 {
 242         crit_enter();
 243         if ((dccb->state & DCCB_ACTIVE) != 0)
 244                 LIST_REMOVE(&dccb->ccb->ccb_h, sim_links.le);
 245         if ((dccb->state & DCCB_RELEASE_SIMQ) != 0)
 246                 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 247         else if (dpt->resource_shortage != 0
 248          && (dccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
 249                 dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 250                 dpt->resource_shortage = FALSE;
 251         }
 252         dccb->state = DCCB_FREE;
 253         SLIST_INSERT_HEAD(&dpt->free_dccb_list, dccb, links);
 254         ++dpt->free_dccbs;
 255         crit_exit();
 256 }
 257
 258 static __inline bus_addr_t
 259 dptccbvtop(struct dpt_softc *dpt, struct dpt_ccb *dccb)
 260 {
 261         return (dpt->dpt_ccb_busbase
 262               + (u_int32_t)((caddr_t)dccb - (caddr_t)dpt->dpt_dccbs));
 263 }
 264
 265 static __inline struct dpt_ccb *
 266 dptccbptov(struct dpt_softc *dpt, bus_addr_t busaddr)
 267 {
 268         return (dpt->dpt_dccbs
 269              +  ((struct dpt_ccb *)busaddr
 270                - (struct dpt_ccb *)dpt->dpt_ccb_busbase));
 271 }
 272
 273 /*
 274  * Send a command for immediate execution by the DPT
 275  * See above function for IMPORTANT notes.
 276  */
 277 static __inline int
 278 dpt_send_immediate(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
 279                    u_int32_t cmd_busaddr, u_int retries,
 280                    u_int ifc, u_int code, u_int code2)
 281 {
 282         return (dpt_send_eata_command(dpt, cmd_block, cmd_busaddr,
 283                                       EATA_CMD_IMMEDIATE, retries, ifc,
 284                                       code, code2));
 285 }
 286
 287
 288 /* ===================== Private Function definitions =======================*/
 289 static void
 290 dptmapmem(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 291 {
 292         bus_addr_t *busaddrp;
 293
 294         busaddrp = (bus_addr_t *)arg;
 295         *busaddrp = segs->ds_addr;
 296 }
 297
 298 static struct sg_map_node *
 299 dptallocsgmap(struct dpt_softc *dpt)
 300 {
 301         struct sg_map_node *sg_map;
 302
 303         sg_map = kmalloc(sizeof(*sg_map), M_DEVBUF, M_INTWAIT);
 304
 305         /* Allocate S/G space for the next batch of CCBS */
 306         if (bus_dmamem_alloc(dpt->sg_dmat, (void **)&sg_map->sg_vaddr,
 307                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
 308                 kfree(sg_map, M_DEVBUF);
 309                 return (NULL);
 310         }
 311
 312         (void)bus_dmamap_load(dpt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
 313                               PAGE_SIZE, dptmapmem, &sg_map->sg_physaddr,
 314                               /*flags*/0);
 315
 316         SLIST_INSERT_HEAD(&dpt->sg_maps, sg_map, links);
 317
 318         return (sg_map);
 319 }
 320
 321 /*
 322  * Allocate another chunk of CCB's. Return count of entries added.
 323  * Assumed to be called at splcam().
 324  */
 325 static int
 326 dptallocccbs(dpt_softc_t *dpt)
 327 {
 328         struct dpt_ccb *next_ccb;
 329         struct sg_map_node *sg_map;
 330         bus_addr_t physaddr;
 331         dpt_sg_t *segs;
 332         int newcount;
 333         int i;
 334
 335         next_ccb = &dpt->dpt_dccbs[dpt->total_dccbs];
 336
 337         if (next_ccb == dpt->dpt_dccbs) {
 338                 /*
 339                  * First time through.  Re-use the S/G
 340                  * space we allocated for initialization
 341                  * CCBS.
 342                  */
 343                 sg_map = SLIST_FIRST(&dpt->sg_maps);
 344         } else {
 345                 sg_map = dptallocsgmap(dpt);
 346         }
 347
 348         if (sg_map == NULL)
 349                 return (0);
 350
 351         segs = sg_map->sg_vaddr;
 352         physaddr = sg_map->sg_physaddr;
 353
 354         newcount = (PAGE_SIZE / (dpt->sgsize * sizeof(dpt_sg_t)));
 355         for (i = 0; dpt->total_dccbs < dpt->max_dccbs && i < newcount; i++) {
 356                 int error;
 357
 358                 error = bus_dmamap_create(dpt->buffer_dmat, /*flags*/0,
 359                                           &next_ccb->dmamap);
 360                 if (error != 0)
 361                         break;
 362                 next_ccb->sg_list = segs;
 363                 next_ccb->sg_busaddr = htonl(physaddr);
 364                 next_ccb->eata_ccb.cp_dataDMA = htonl(physaddr);
 365                 next_ccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
 366                 next_ccb->eata_ccb.cp_reqDMA =
 367                     htonl(dptccbvtop(dpt, next_ccb)
 368                         + offsetof(struct dpt_ccb, sense_data));
 369                 next_ccb->eata_ccb.cp_busaddr = dpt->dpt_ccb_busend;
 370                 next_ccb->state = DCCB_FREE;
 371                 next_ccb->tag = dpt->total_dccbs;
 372                 SLIST_INSERT_HEAD(&dpt->free_dccb_list, next_ccb, links);
 373                 segs += dpt->sgsize;
 374                 physaddr += (dpt->sgsize * sizeof(dpt_sg_t));
 375                 dpt->dpt_ccb_busend += sizeof(*next_ccb);
 376                 next_ccb++;
 377                 dpt->total_dccbs++;
 378         }
 379         return (i);
 380 }
 381
 382 dpt_conf_t *
 383 dpt_pio_get_conf (u_int32_t base)
 384 {
 385         static dpt_conf_t *     conf;
 386         u_int16_t *             p;
 387         int                     i;
 388
 389         /*
 390          * Allocate a dpt_conf_t
 391          */
 392         if (conf == NULL)
 393                 conf = kmalloc(sizeof(dpt_conf_t), M_DEVBUF, M_INTWAIT);
 394
 395         /*
 396          * If we have one, clean it up.
 397          */
 398         bzero(conf, sizeof(dpt_conf_t));
 399
 400         /*
 401          * Reset the controller.
 402          */
 403         outb((base + HA_WCOMMAND), EATA_CMD_RESET);
 404
 405         /*
 406          * Wait for the controller to become ready.
 407          * For some reason there can be -no- delays after calling reset
 408          * before we wait on ready status.
 409          */
 410         if (dpt_pio_wait(base, HA_RSTATUS, HA_SBUSY, 0)) {
 411                 kprintf("dpt: timeout waiting for controller to become ready\n");
 412                 return (NULL);
 413         }
 414
 415         if (dpt_pio_wait(base, HA_RAUXSTAT, HA_ABUSY, 0)) {
 416                 kprintf("dpt: timetout waiting for adapter ready.\n");
 417                 return (NULL);
 418         }
 419
 420         /*
 421          * Send the PIO_READ_CONFIG command.
 422          */
 423         outb((base + HA_WCOMMAND), EATA_CMD_PIO_READ_CONFIG);
 424
 425         /*
 426          * Read the data into the struct.
 427          */
 428         p = (u_int16_t *)conf;
 429         for (i = 0; i < (sizeof(dpt_conf_t) / 2); i++) {
 430
 431                 if (dpt_pio_wait(base, HA_RSTATUS, HA_SDRQ, 0)) {
 432                         kprintf("dpt: timeout in data read.\n");
 433                         return (NULL);
 434                 }
 435
 436                 (*p) = inw(base + HA_RDATA);
 437                 p++;
 438         }
 439
 440         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 441                 kprintf("dpt: error reading configuration data.\n");
 442                 return (NULL);
 443         }
 444
 445 #define BE_EATA_SIGNATURE       0x45415441
 446 #define LE_EATA_SIGNATURE       0x41544145
 447
 448         /*
 449          * Test to see if we have a valid card.
 450          */
 451         if ((conf->signature == BE_EATA_SIGNATURE) ||
 452             (conf->signature == LE_EATA_SIGNATURE)) {
 453
 454                 while (inb(base + HA_RSTATUS) & HA_SDRQ) {
 455                         inw(base + HA_RDATA);
 456                 }
 457
 458                 return (conf);
 459         }
 460         return (NULL);
 461 }
 462
 463 /*
 464  * Read a configuration page into the supplied dpt_cont_t buffer.
 465  */
 466 static int
 467 dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
 468              u_int size, u_int page, u_int target, int extent)
 469 {
 470         eata_ccb_t *cp;
 471
 472         u_int8_t   status;
 473
 474         int        ndx;
 475         int        result;
 476
 477         cp = &dccb->eata_ccb;
 478         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(*dpt->sp));
 479
 480         cp->Interpret = 1;
 481         cp->DataIn = 1;
 482         cp->Auto_Req_Sen = 1;
 483         cp->reqlen = sizeof(struct scsi_sense_data);
 484
 485         cp->cp_id = target;
 486         cp->cp_LUN = 0;         /* In the EATA packet */
 487         cp->cp_lun = 0;         /* In the SCSI command */
 488
 489         cp->cp_scsi_cmd = INQUIRY;
 490         cp->cp_len = size;
 491
 492         cp->cp_extent = extent;
 493
 494         cp->cp_page = page;
 495         cp->cp_channel = 0;     /* DNC, Interpret mode is set */
 496         cp->cp_identify = 1;
 497         cp->cp_datalen = htonl(size);
 498
 499         crit_enter();
 500
 501         /*
 502          * This could be a simple for loop, but we suspected the compiler To
 503          * have optimized it a bit too much. Wait for the controller to
 504          * become ready
 505          */
 506         while (((status = dpt_inb(dpt, HA_RSTATUS)) != (HA_SREADY | HA_SSC)
 507              && (status != (HA_SREADY | HA_SSC | HA_SERROR))
 508              && (status != (HA_SDRDY | HA_SERROR | HA_SDRQ)))
 509             || (dpt_wait(dpt, HA_SBUSY, 0))) {
 510
 511                 /*
 512                  * RAID Drives still Spinning up? (This should only occur if
 513                  * the DPT controller is in a NON PC (PCI?) platform).
 514                  */
 515                 if (dpt_raid_busy(dpt)) {
 516                         kprintf("dpt%d WARNING: Get_conf() RSUS failed.\n",
 517                                dpt->unit);
 518                         crit_exit();
 519                         return (0);
 520                 }
 521         }
 522
 523         DptStat_Reset_BUSY(dpt->sp);
 524
 525         /*
 526          * XXXX We might want to do something more clever than aborting at
 527          * this point, like resetting (rebooting) the controller and trying
 528          * again.
 529          */
 530         if ((result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
 531                                             EATA_CMD_DMA_SEND_CP,
 532                                             10000, 0, 0, 0)) != 0) {
 533                 kprintf("dpt%d WARNING: Get_conf() failed (%d) to send "
 534                        "EATA_CMD_DMA_READ_CONFIG\n",
 535                        dpt->unit, result);
 536                 crit_exit();
 537                 return (0);
 538         }
 539         /* Wait for two seconds for a response.  This can be slow  */
 540         for (ndx = 0;
 541              (ndx < 20000)
 542              && !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
 543              ndx++) {
 544                 DELAY(50);
 545         }
 546
 547         /* Grab the status and clear interrupts */
 548         status = dpt_inb(dpt, HA_RSTATUS);
 549
 550         crit_exit();
 551
 552         /*
 553          * Check the status carefully.  Return only if the
 554          * command was successful.
 555          */
 556         if (((status & HA_SERROR) == 0)
 557          && (dpt->sp->hba_stat == 0)
 558          && (dpt->sp->scsi_stat == 0)
 559          && (dpt->sp->residue_len == 0))
 560                 return (0);
 561
 562         if (dpt->sp->scsi_stat == SCSI_STATUS_CHECK_COND)
 563                 return (0);
 564
 565         return (1);
 566 }
 567
 568 /* Detect Cache parameters and size */
 569 static void
 570 dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr,
 571                  u_int8_t *buff)
 572 {
 573         eata_ccb_t *cp;
 574         u_int8_t   *param;
 575         int         bytes;
 576         int         result;
 577         int         ndx;
 578         u_int8_t    status;
 579
 580         /*
 581          * Default setting, for best perfromance..
 582          * This is what virtually all cards default to..
 583          */
 584         dpt->cache_type = DPT_CACHE_WRITEBACK;
 585         dpt->cache_size = 0;
 586
 587         cp = &dccb->eata_ccb;
 588         bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(dpt->sp));
 589         bzero(buff, 512);
 590
 591         /* Setup the command structure */
 592         cp->Interpret = 1;
 593         cp->DataIn = 1;
 594         cp->Auto_Req_Sen = 1;
 595         cp->reqlen = sizeof(struct scsi_sense_data);
 596
 597         cp->cp_id = 0;          /* who cares?  The HBA will interpret.. */
 598         cp->cp_LUN = 0;         /* In the EATA packet */
 599         cp->cp_lun = 0;         /* In the SCSI command */
 600         cp->cp_channel = 0;
 601
 602         cp->cp_scsi_cmd = EATA_CMD_DMA_SEND_CP;
 603         cp->cp_len = 56;
 604
 605         cp->cp_extent = 0;
 606         cp->cp_page = 0;
 607         cp->cp_identify = 1;
 608         cp->cp_dispri = 1;
 609
 610         /*
 611          * Build the EATA Command Packet structure
 612          * for a Log Sense Command.
 613          */
 614         cp->cp_cdb[0] = 0x4d;
 615         cp->cp_cdb[1] = 0x0;
 616         cp->cp_cdb[2] = 0x40 | 0x33;
 617         cp->cp_cdb[7] = 1;
 618
 619         cp->cp_datalen = htonl(512);
 620
 621         crit_enter();
 622         result = dpt_send_eata_command(dpt, cp, dccb_busaddr,
 623                                        EATA_CMD_DMA_SEND_CP,
 624                                        10000, 0, 0, 0);
 625         if (result != 0) {
 626                 kprintf("dpt%d WARNING: detect_cache() failed (%d) to send "
 627                        "EATA_CMD_DMA_SEND_CP\n", dpt->unit, result);
 628                 crit_exit();
 629                 return;
 630         }
 631         /* Wait for two seconds for a response.  This can be slow... */
 632         for (ndx = 0;
 633              (ndx < 20000) &&
 634              !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
 635              ndx++) {
 636                 DELAY(50);
 637         }
 638
 639         /* Grab the status and clear interrupts */
 640         status = dpt_inb(dpt, HA_RSTATUS);
 641         crit_exit();
 642
 643         /*
 644          * Sanity check
 645          */
 646         if (buff[0] != 0x33) {
 647                 return;
 648         }
 649         bytes = DPT_HCP_LENGTH(buff);
 650         param = DPT_HCP_FIRST(buff);
 651
 652         if (DPT_HCP_CODE(param) != 1) {
 653                 /*
 654                  * DPT Log Page layout error
 655                  */
 656                 kprintf("dpt%d: NOTICE: Log Page (1) layout error\n",
 657                        dpt->unit);
 658                 return;
 659         }
 660         if (!(param[4] & 0x4)) {
 661                 dpt->cache_type = DPT_NO_CACHE;
 662                 return;
 663         }
 664         while (DPT_HCP_CODE(param) != 6) {
 665                 param = DPT_HCP_NEXT(param);
 666                 if ((param < buff)
 667                  || (param >= &buff[bytes])) {
 668                         return;
 669                 }
 670         }
 671
 672         if (param[4] & 0x2) {
 673                 /*
 674                  * Cache disabled
 675                  */
 676                 dpt->cache_type = DPT_NO_CACHE;
 677                 return;
 678         }
 679
 680         if (param[4] & 0x4) {
 681                 dpt->cache_type = DPT_CACHE_WRITETHROUGH;
 682         }
 683
 684         /* XXX This isn't correct.  This log parameter only has two bytes.... */
 685 #if 0
 686         dpt->cache_size = param[5]
 687                         | (param[6] << 8)
 688                         | (param[7] << 16)
 689                         | (param[8] << 24);
 690 #endif
 691 }
 692
 693 static void
 694 dpt_poll(struct cam_sim *sim)
 695 {
 696         dpt_intr(cam_sim_softc(sim));
 697 }
 698
 699 static void
 700 dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
 701 {
 702         struct   dpt_ccb *dccb;
 703         union    ccb *ccb;
 704         struct   dpt_softc *dpt;
 705
 706         dccb = (struct dpt_ccb *)arg;
 707         ccb = dccb->ccb;
 708         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
 709
 710         if (error != 0) {
 711                 if (error != EFBIG)
 712                         kprintf("dpt%d: Unexpected error 0x%x returned from "
 713                                "bus_dmamap_load\n", dpt->unit, error);
 714                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
 715                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 716                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
 717                 }
 718                 dptfreeccb(dpt, dccb);
 719                 xpt_done(ccb);
 720                 return;
 721         }
 722
 723         if (nseg != 0) {
 724                 dpt_sg_t *sg;
 725                 bus_dma_segment_t *end_seg;
 726                 bus_dmasync_op_t op;
 727
 728                 end_seg = dm_segs + nseg;
 729
 730                 /* Copy the segments into our SG list */
 731                 sg = dccb->sg_list;
 732                 while (dm_segs < end_seg) {
 733                         sg->seg_len = htonl(dm_segs->ds_len);
 734                         sg->seg_addr = htonl(dm_segs->ds_addr);
 735                         sg++;
 736                         dm_segs++;
 737                 }
 738
 739                 if (nseg > 1) {
 740                         dccb->eata_ccb.scatter = 1;
 741                         dccb->eata_ccb.cp_dataDMA = dccb->sg_busaddr;
 742                         dccb->eata_ccb.cp_datalen =
 743                             htonl(nseg * sizeof(dpt_sg_t));
 744                 } else {
 745                         dccb->eata_ccb.cp_dataDMA = dccb->sg_list[0].seg_addr;
 746                         dccb->eata_ccb.cp_datalen = dccb->sg_list[0].seg_len;
 747                 }
 748
 749                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 750                         op = BUS_DMASYNC_PREREAD;
 751                 else
 752                         op = BUS_DMASYNC_PREWRITE;
 753
 754                 bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
 755
 756         } else {
 757                 dccb->eata_ccb.cp_dataDMA = 0;
 758                 dccb->eata_ccb.cp_datalen = 0;
 759         }
 760
 761         crit_enter();
 762
 763         /*
 764          * Last time we need to check if this CCB needs to
 765          * be aborted.
 766          */
 767         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 768                 if (nseg != 0)
 769                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
 770                 dptfreeccb(dpt, dccb);
 771                 xpt_done(ccb);
 772                 crit_exit();
 773                 return;
 774         }
 775
 776         dccb->state |= DCCB_ACTIVE;
 777         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 778         LIST_INSERT_HEAD(&dpt->pending_ccb_list, &ccb->ccb_h, sim_links.le);
 779         callout_reset(&ccb->ccb_h.timeout_ch, (ccb->ccb_h.timeout * hz) / 1000,
 780                       dpttimeout, dccb);
 781         if (dpt_send_eata_command(dpt, &dccb->eata_ccb,
 782                                   dccb->eata_ccb.cp_busaddr,
 783                                   EATA_CMD_DMA_SEND_CP, 0, 0, 0, 0) != 0) {
 784                 ccb->ccb_h.status = CAM_NO_HBA; /* HBA dead or just busy?? */
 785                 if (nseg != 0)
 786                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
 787                 dptfreeccb(dpt, dccb);
 788                 xpt_done(ccb);
 789         }
 790
 791         crit_exit();
 792 }
 793
 794 static void
 795 dpt_action(struct cam_sim *sim, union ccb *ccb)
 796 {
 797         struct    dpt_softc *dpt;
 798
 799         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("dpt_action\n"));
 800
 801         dpt = (struct dpt_softc *)cam_sim_softc(sim);
 802
 803         if ((dpt->state & DPT_HA_SHUTDOWN_ACTIVE) != 0) {
 804                 xpt_print_path(ccb->ccb_h.path);
 805                 kprintf("controller is shutdown. Aborting CCB.\n");
 806                 ccb->ccb_h.status = CAM_NO_HBA;
 807                 xpt_done(ccb);
 808                 return;
 809         }
 810
 811         switch (ccb->ccb_h.func_code) {
 812         /* Common cases first */
 813         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
 814         {
 815                 struct  ccb_scsiio *csio;
 816                 struct  ccb_hdr *ccbh;
 817                 struct  dpt_ccb *dccb;
 818                 struct  eata_ccb *eccb;
 819
 820                 csio = &ccb->csio;
 821                 ccbh = &ccb->ccb_h;
 822                 /* Max CDB length is 12 bytes */
 823                 if (csio->cdb_len > 12) {
 824                         ccb->ccb_h.status = CAM_REQ_INVALID;
 825                         xpt_done(ccb);
 826                         return;
 827                 }
 828                 if ((dccb = dptgetccb(dpt)) == NULL) {
 829                         crit_enter();
 830                         dpt->resource_shortage = 1;
 831                         crit_exit();
 832                         xpt_freeze_simq(sim, /*count*/1);
 833                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 834                         xpt_done(ccb);
 835                         return;
 836                 }
 837                 eccb = &dccb->eata_ccb;
 838
 839                 /* Link dccb and ccb so we can find one from the other */
 840                 dccb->ccb = ccb;
 841                 ccb->ccb_h.ccb_dccb_ptr = dccb;
 842                 ccb->ccb_h.ccb_dpt_ptr = dpt;
 843
 844                 /*
 845                  * Explicitly set all flags so that the compiler can
 846                  * be smart about setting them.
 847                  */
 848                 eccb->SCSI_Reset = 0;
 849                 eccb->HBA_Init = 0;
 850                 eccb->Auto_Req_Sen = (ccb->ccb_h.flags & CAM_DIS_AUTOSENSE)
 851                                    ? 0 : 1;
 852                 eccb->scatter = 0;
 853                 eccb->Quick = 0;
 854                 eccb->Interpret =
 855                     ccb->ccb_h.target_id == dpt->hostid[cam_sim_bus(sim)]
 856                     ? 1 : 0;
 857                 eccb->DataOut = (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
 858                 eccb->DataIn = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
 859                 eccb->reqlen = csio->sense_len;
 860                 eccb->cp_id = ccb->ccb_h.target_id;
 861                 eccb->cp_channel = cam_sim_bus(sim);
 862                 eccb->cp_LUN = ccb->ccb_h.target_lun;
 863                 eccb->cp_luntar = 0;
 864                 eccb->cp_dispri = (ccb->ccb_h.flags & CAM_DIS_DISCONNECT)
 865                                 ? 0 : 1;
 866                 eccb->cp_identify = 1;
 867
 868                 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0
 869                  && csio->tag_action != CAM_TAG_ACTION_NONE) {
 870                         eccb->cp_msg[0] = csio->tag_action;
 871                         eccb->cp_msg[1] = dccb->tag;
 872                 } else {
 873                         eccb->cp_msg[0] = 0;
 874                         eccb->cp_msg[1] = 0;
 875                 }
 876                 eccb->cp_msg[2] = 0;
 877
 878                 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
 879                         if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
 880                                 bcopy(csio->cdb_io.cdb_ptr,
 881                                       eccb->cp_cdb, csio->cdb_len);
 882                         } else {
 883                                 /* I guess I could map it in... */
 884                                 ccb->ccb_h.status = CAM_REQ_INVALID;
 885                                 dptfreeccb(dpt, dccb);
 886                                 xpt_done(ccb);
 887                                 return;
 888                         }
 889                 } else {
 890                         bcopy(csio->cdb_io.cdb_bytes,
 891                               eccb->cp_cdb, csio->cdb_len);
 892                 }
 893                 /*
 894                  * If we have any data to send with this command,
 895                  * map it into bus space.
 896                  */
 897                 /* Only use S/G if there is a transfer */
 898                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 899                         if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
 900                                 /*
 901                                  * We've been given a pointer
 902                                  * to a single buffer.
 903                                  */
 904                                 if ((ccbh->flags & CAM_DATA_PHYS) == 0) {
 905                                         int error;
 906
 907                                         crit_enter();
 908                                         error =
 909                                             bus_dmamap_load(dpt->buffer_dmat,
 910                                                             dccb->dmamap,
 911                                                             csio->data_ptr,
 912                                                             csio->dxfer_len,
 913                                                             dptexecuteccb,
 914                                                             dccb, /*flags*/0);
 915                                         if (error == EINPROGRESS) {
 916                                                 /*
 917                                                  * So as to maintain ordering,
 918                                                  * freeze the controller queue
 919                                                  * until our mapping is
 920                                                  * returned.
 921                                                  */
 922                                                 xpt_freeze_simq(sim, 1);
 923                                                 dccb->state |= CAM_RELEASE_SIMQ;
 924                                         }
 925                                         crit_exit();
 926                                 } else {
 927                                         struct bus_dma_segment seg;
 928
 929                                         /* Pointer to physical buffer */
 930                                         seg.ds_addr =
 931                                             (bus_addr_t)csio->data_ptr;
 932                                         seg.ds_len = csio->dxfer_len;
 933                                         dptexecuteccb(dccb, &seg, 1, 0);
 934                                 }
 935                         } else {
 936                                 struct bus_dma_segment *segs;
 937
 938                                 if ((ccbh->flags & CAM_DATA_PHYS) != 0)
 939                                         panic("dpt_action - Physical "
 940                                               "segment pointers "
 941                                               "unsupported");
 942
 943                                 if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
 944                                         panic("dpt_action - Virtual "
 945                                               "segment addresses "
 946                                               "unsupported");
 947
 948                                 /* Just use the segments provided */
 949                                 segs = (struct bus_dma_segment *)csio->data_ptr;
 950                                 dptexecuteccb(dccb, segs, csio->sglist_cnt, 0);
 951                         }
 952                 } else {
 953                         /*
 954                          * XXX JGibbs.
 955                          * Does it want them both on or both off?
 956                          * CAM_DIR_NONE is both on, so this code can
 957                          * be removed if this is also what the DPT
 958                          * exptects.
 959                          */
 960                         eccb->DataOut = 0;
 961                         eccb->DataIn = 0;
 962                         dptexecuteccb(dccb, NULL, 0, 0);
 963                 }
 964                 break;
 965         }
 966         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
 967         case XPT_ABORT:                 /* Abort the specified CCB */
 968                 /* XXX Implement */
 969                 ccb->ccb_h.status = CAM_REQ_INVALID;
 970                 xpt_done(ccb);
 971                 break;
 972         case XPT_SET_TRAN_SETTINGS:
 973         {
 974                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 975                 xpt_done(ccb);
 976                 break;
 977         }
 978         case XPT_GET_TRAN_SETTINGS:
 979         /* Get default/user set transfer settings for the target */
 980         {
 981                 struct  ccb_trans_settings *cts = &ccb->cts;
 982                 struct ccb_trans_settings_scsi *scsi =
 983                     &cts->proto_specific.scsi;
 984                 struct ccb_trans_settings_spi *spi =
 985                     &cts->xport_specific.spi;
 986
 987                 cts->protocol = PROTO_SCSI;
 988                 cts->protocol_version = SCSI_REV_2;
 989                 cts->transport = XPORT_SPI;
 990                 cts->transport_version = 2;
 991
 992                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
 993                         spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 994                         spi->bus_width = (dpt->max_id > 7)
 995                                        ? MSG_EXT_WDTR_BUS_8_BIT
 996                                        : MSG_EXT_WDTR_BUS_16_BIT;
 997                         spi->sync_period = 25; /* 10MHz */
 998                         if (spi->sync_period != 0)
 999                                 spi->sync_offset = 15;
1000                         scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
1001
1002                         spi->valid = CTS_SPI_VALID_SYNC_RATE
1003                                 | CTS_SPI_VALID_SYNC_OFFSET
1004                                 | CTS_SPI_VALID_SYNC_RATE
1005                                 | CTS_SPI_VALID_BUS_WIDTH
1006                                 | CTS_SPI_VALID_DISC;
1007                         scsi->valid = CTS_SCSI_VALID_TQ;
1008                         ccb->ccb_h.status = CAM_REQ_CMP;
1009                 } else {
1010                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1011                 }
1012                 xpt_done(ccb);
1013                 break;
1014         }
1015         case XPT_CALC_GEOMETRY:
1016         {
1017                 struct    ccb_calc_geometry *ccg;
1018                 u_int32_t size_mb;
1019                 u_int32_t secs_per_cylinder;
1020                 int       extended;
1021
1022                 /*
1023                  * XXX Use Adaptec translation until I find out how to
1024                  *     get this information from the card.
1025                  */
1026                 ccg = &ccb->ccg;
1027                 size_mb = ccg->volume_size
1028                         / ((1024L * 1024L) / ccg->block_size);
1029                 extended = 1;
1030
1031                 if (size_mb > 1024 && extended) {
1032                         ccg->heads = 255;
1033                         ccg->secs_per_track = 63;
1034                 } else {
1035                         ccg->heads = 64;
1036                         ccg->secs_per_track = 32;
1037                 }
1038                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
1039                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
1040                 ccb->ccb_h.status = CAM_REQ_CMP;
1041                 xpt_done(ccb);
1042                 break;
1043         }
1044         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
1045         {
1046                 /* XXX Implement */
1047                 ccb->ccb_h.status = CAM_REQ_CMP;
1048                 xpt_done(ccb);
1049                 break;
1050         }
1051         case XPT_TERM_IO:               /* Terminate the I/O process */
1052                 /* XXX Implement */
1053                 ccb->ccb_h.status = CAM_REQ_INVALID;
1054                 xpt_done(ccb);
1055                 break;
1056         case XPT_PATH_INQ:              /* Path routing inquiry */
1057         {
1058                 struct ccb_pathinq *cpi = &ccb->cpi;
1059
1060                 cpi->version_num = 1;
1061                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
1062                 if (dpt->max_id > 7)
1063                         cpi->hba_inquiry |= PI_WIDE_16;
1064                 cpi->target_sprt = 0;
1065                 cpi->hba_misc = 0;
1066                 cpi->hba_eng_cnt = 0;
1067                 cpi->max_target = dpt->max_id;
1068                 cpi->max_lun = dpt->max_lun;
1069                 cpi->initiator_id = dpt->hostid[cam_sim_bus(sim)];
1070                 cpi->bus_id = cam_sim_bus(sim);
1071                 cpi->base_transfer_speed = 3300;
1072                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
1073                 strncpy(cpi->hba_vid, "DPT", HBA_IDLEN);
1074                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
1075                 cpi->unit_number = cam_sim_unit(sim);
1076                 cpi->transport = XPORT_SPI;
1077                 cpi->transport_version = 2;
1078                 cpi->protocol = PROTO_SCSI;
1079                 cpi->protocol_version = SCSI_REV_2;
1080                 cpi->ccb_h.status = CAM_REQ_CMP;
1081                 xpt_done(ccb);
1082                 break;
1083         }
1084         default:
1085                 ccb->ccb_h.status = CAM_REQ_INVALID;
1086                 xpt_done(ccb);
1087                 break;
1088         }
1089 }
1090
1091 /*
1092  * This routine will try to send an EATA command to the DPT HBA.
1093  * It will, by default, try 20,000 times, waiting 50us between tries.
1094  * It returns 0 on success and 1 on failure.
1095  * It is assumed to be called at splcam().
1096  */
1097 static int
1098 dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd_block,
1099                       u_int32_t cmd_busaddr, u_int command, u_int retries,
1100                       u_int ifc, u_int code, u_int code2)
1101 {
1102         u_int   loop;
1103
1104         if (!retries)
1105                 retries = 20000;
1106
1107         /*
1108          * I hate this polling nonsense. Wish there was a way to tell the DPT
1109          * to go get commands at its own pace,  or to interrupt when ready.
1110          * In the mean time we will measure how many itterations it really
1111          * takes.
1112          */
1113         for (loop = 0; loop < retries; loop++) {
1114                 if ((dpt_inb(dpt, HA_RAUXSTAT) & HA_ABUSY) == 0)
1115                         break;
1116                 else
1117                         DELAY(50);
1118         }
1119
1120         if (loop < retries) {
1121 #ifdef DPT_MEASURE_PERFORMANCE
1122                 if (loop > dpt->performance.max_eata_tries)
1123                         dpt->performance.max_eata_tries = loop;
1124
1125                 if (loop < dpt->performance.min_eata_tries)
1126                         dpt->performance.min_eata_tries = loop;
1127 #endif
1128         } else {
1129 #ifdef DPT_MEASURE_PERFORMANCE
1130                 ++dpt->performance.command_too_busy;
1131 #endif
1132                 return (1);
1133         }
1134
1135         /* The controller is alive, advance the wedge timer */
1136 #ifdef DPT_RESET_HBA
1137         dpt->last_contact = microtime_now;
1138 #endif
1139
1140         if (cmd_block == NULL)
1141                 cmd_busaddr = 0;
1142 #if (BYTE_ORDER == BIG_ENDIAN)
1143         else {
1144                 cmd_busaddr = ((cmd_busaddr >> 24) & 0xFF)
1145                             | ((cmd_busaddr >> 16) & 0xFF)
1146                             | ((cmd_busaddr >> 8) & 0xFF)
1147                             | (cmd_busaddr & 0xFF);
1148         }
1149 #endif
1150         /* And now the address */
1151         dpt_outl(dpt, HA_WDMAADDR, cmd_busaddr);
1152
1153         if (command == EATA_CMD_IMMEDIATE) {
1154                 if (cmd_block == NULL) {
1155                         dpt_outb(dpt, HA_WCODE2, code2);
1156                         dpt_outb(dpt, HA_WCODE, code);
1157                 }
1158                 dpt_outb(dpt, HA_WIFC, ifc);
1159         }
1160         dpt_outb(dpt, HA_WCOMMAND, command);
1161
1162         return (0);
1163 }
1164
1165
1166 /* ==================== Exported Function definitions =======================*/
1167 dpt_softc_t *
1168 dpt_alloc(device_t dev, bus_space_tag_t tag, bus_space_handle_t bsh)
1169 {
1170         dpt_softc_t     *dpt = device_get_softc(dev);
1171         int    i;
1172
1173         bzero(dpt, sizeof(dpt_softc_t));
1174         dpt->tag = tag;
1175         dpt->bsh = bsh;
1176         dpt->unit = device_get_unit(dev);
1177         SLIST_INIT(&dpt->free_dccb_list);
1178         LIST_INIT(&dpt->pending_ccb_list);
1179         TAILQ_INSERT_TAIL(&dpt_softcs, dpt, links);
1180         for (i = 0; i < MAX_CHANNELS; i++)
1181                 dpt->resetlevel[i] = DPT_HA_OK;
1182
1183 #ifdef DPT_MEASURE_PERFORMANCE
1184         dpt_reset_performance(dpt);
1185 #endif /* DPT_MEASURE_PERFORMANCE */
1186         return (dpt);
1187 }
1188
1189 void
1190 dpt_free(struct dpt_softc *dpt)
1191 {
1192         switch (dpt->init_level) {
1193         default:
1194         case 5:
1195                 bus_dmamap_unload(dpt->dccb_dmat, dpt->dccb_dmamap);
1196         case 4:
1197                 bus_dmamem_free(dpt->dccb_dmat, dpt->dpt_dccbs,
1198                                 dpt->dccb_dmamap);
1199                 bus_dmamap_destroy(dpt->dccb_dmat, dpt->dccb_dmamap);
1200         case 3:
1201                 bus_dma_tag_destroy(dpt->dccb_dmat);
1202         case 2:
1203                 bus_dma_tag_destroy(dpt->buffer_dmat);
1204         case 1:
1205         {
1206                 struct sg_map_node *sg_map;
1207
1208                 while ((sg_map = SLIST_FIRST(&dpt->sg_maps)) != NULL) {
1209                         SLIST_REMOVE_HEAD(&dpt->sg_maps, links);
1210                         bus_dmamap_unload(dpt->sg_dmat,
1211                                           sg_map->sg_dmamap);
1212                         bus_dmamem_free(dpt->sg_dmat, sg_map->sg_vaddr,
1213                                         sg_map->sg_dmamap);
1214                         kfree(sg_map, M_DEVBUF);
1215                 }
1216                 bus_dma_tag_destroy(dpt->sg_dmat);
1217         }
1218         case 0:
1219                 break;
1220         }
1221         TAILQ_REMOVE(&dpt_softcs, dpt, links);
1222 }
1223
1224 static u_int8_t string_sizes[] =
1225 {
1226         sizeof(((dpt_inq_t*)NULL)->vendor),
1227         sizeof(((dpt_inq_t*)NULL)->modelNum),
1228         sizeof(((dpt_inq_t*)NULL)->firmware),
1229         sizeof(((dpt_inq_t*)NULL)->protocol),
1230 };
1231
1232 int
1233 dpt_init(struct dpt_softc *dpt)
1234 {
1235         dpt_conf_t  conf;
1236         struct      sg_map_node *sg_map;
1237         dpt_ccb_t  *dccb;
1238         u_int8_t   *strp;
1239         int         index;
1240         int         i;
1241         int         retval;
1242
1243         dpt->init_level = 0;
1244         SLIST_INIT(&dpt->sg_maps);
1245
1246 #ifdef DPT_RESET_BOARD
1247         kprintf("dpt%d: resetting HBA\n", dpt->unit);
1248         dpt_outb(dpt, HA_WCOMMAND, EATA_CMD_RESET);
1249         DELAY(750000);
1250         /* XXX Shouldn't we poll a status register or something??? */
1251 #endif
1252         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
1253         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1254                                /*lowaddr*/BUS_SPACE_MAXADDR,
1255                                /*highaddr*/BUS_SPACE_MAXADDR,
1256                                /*filter*/NULL, /*filterarg*/NULL,
1257                                PAGE_SIZE, /*nsegments*/1,
1258                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1259                                /*flags*/0, &dpt->sg_dmat) != 0) {
1260                 goto error_exit;
1261         }
1262
1263         dpt->init_level++;
1264
1265         /*
1266          * We allocate our DPT ccbs as a contiguous array of bus dma'able
1267          * memory.  To get the allocation size, we need to know how many
1268          * ccbs the card supports.  This requires a ccb.  We solve this
1269          * chicken and egg problem by allocating some re-usable S/G space
1270          * up front, and treating it as our status packet, CCB, and target
1271          * memory space for these commands.
1272          */
1273         sg_map = dptallocsgmap(dpt);
1274         if (sg_map == NULL)
1275                 goto error_exit;
1276
1277         dpt->sp = (volatile dpt_sp_t *)sg_map->sg_vaddr;
1278         dccb = (struct dpt_ccb *)(uintptr_t)(volatile void *)&dpt->sp[1];
1279         bzero(dccb, sizeof(*dccb));
1280         dpt->sp_physaddr = sg_map->sg_physaddr;
1281         dccb->eata_ccb.cp_dataDMA =
1282             htonl(sg_map->sg_physaddr + sizeof(dpt_sp_t) + sizeof(*dccb));
1283         dccb->eata_ccb.cp_busaddr = ~0;
1284         dccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr);
1285         dccb->eata_ccb.cp_reqDMA = htonl(dpt->sp_physaddr + sizeof(*dccb)
1286                                        + offsetof(struct dpt_ccb, sense_data));
1287
1288         /* Okay.  Fetch our config */
1289         bzero(&dccb[1], sizeof(conf)); /* data area */
1290         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1291                               sizeof(conf), 0xc1, 7, 1);
1292
1293         if (retval != 0) {
1294                 kprintf("dpt%d: Failed to get board configuration\n", dpt->unit);
1295                 return (retval);
1296         }
1297         bcopy(&dccb[1], &conf, sizeof(conf));
1298
1299         bzero(&dccb[1], sizeof(dpt->board_data));
1300         retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1301                               sizeof(dpt->board_data), 0, conf.scsi_id0, 0);
1302         if (retval != 0) {
1303                 kprintf("dpt%d: Failed to get inquiry information\n", dpt->unit);
1304                 return (retval);
1305         }
1306         bcopy(&dccb[1], &dpt->board_data, sizeof(dpt->board_data));
1307
1308         dpt_detect_cache(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t),
1309                          (u_int8_t *)&dccb[1]);
1310
1311         switch (ntohl(conf.splen)) {
1312         case DPT_EATA_REVA:
1313                 dpt->EATA_revision = 'a';
1314                 break;
1315         case DPT_EATA_REVB:
1316                 dpt->EATA_revision = 'b';
1317                 break;
1318         case DPT_EATA_REVC:
1319                 dpt->EATA_revision = 'c';
1320                 break;
1321         case DPT_EATA_REVZ:
1322                 dpt->EATA_revision = 'z';
1323                 break;
1324         default:
1325                 dpt->EATA_revision = '?';
1326         }
1327
1328         dpt->max_id      = conf.MAX_ID;
1329         dpt->max_lun     = conf.MAX_LUN;
1330         dpt->irq         = conf.IRQ;
1331         dpt->dma_channel = (8 - conf.DMA_channel) & 7;
1332         dpt->channels    = conf.MAX_CHAN + 1;
1333         dpt->state      |= DPT_HA_OK;
1334         if (conf.SECOND)
1335                 dpt->primary = FALSE;
1336         else
1337                 dpt->primary = TRUE;
1338
1339         dpt->more_support = conf.MORE_support;
1340
1341         if (strncmp(dpt->board_data.firmware, "07G0", 4) >= 0)
1342                 dpt->immediate_support = 1;
1343         else
1344                 dpt->immediate_support = 0;
1345
1346         dpt->broken_INQUIRY = FALSE;
1347
1348         dpt->cplen = ntohl(conf.cplen);
1349         dpt->cppadlen = ntohs(conf.cppadlen);
1350         dpt->max_dccbs = ntohs(conf.queuesiz);
1351
1352         if (dpt->max_dccbs > 256) {
1353                 kprintf("dpt%d: Max CCBs reduced from %d to "
1354                        "256 due to tag algorithm\n", dpt->unit, dpt->max_dccbs);
1355                 dpt->max_dccbs = 256;
1356         }
1357
1358         dpt->hostid[0] = conf.scsi_id0;
1359         dpt->hostid[1] = conf.scsi_id1;
1360         dpt->hostid[2] = conf.scsi_id2;
1361
1362         if (conf.SG_64K)
1363                 dpt->sgsize = 8192;
1364         else
1365                 dpt->sgsize = ntohs(conf.SGsiz);
1366
1367         /* We can only get 64k buffers, so don't bother to waste space. */
1368         if (dpt->sgsize < 17 || dpt->sgsize > 32)
1369                 dpt->sgsize = 32;
1370
1371         if (dpt->sgsize > dpt_max_segs)
1372                 dpt->sgsize = dpt_max_segs;
1373
1374         /* DMA tag for mapping buffers into device visible space. */
1375         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1376                                /*lowaddr*/BUS_SPACE_MAXADDR,
1377                                /*highaddr*/BUS_SPACE_MAXADDR,
1378                                /*filter*/NULL, /*filterarg*/NULL,
1379                                /*maxsize*/MAXBSIZE, /*nsegments*/dpt->sgsize,
1380                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1381                                /*flags*/BUS_DMA_ALLOCNOW,
1382                                &dpt->buffer_dmat) != 0) {
1383                 kprintf("dpt: bus_dma_tag_create(...,dpt->buffer_dmat) failed\n");
1384                 goto error_exit;
1385         }
1386
1387         dpt->init_level++;
1388
1389         /* DMA tag for our ccb structures and interrupt status packet */
1390         if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
1391                                /*lowaddr*/BUS_SPACE_MAXADDR,
1392                                /*highaddr*/BUS_SPACE_MAXADDR,
1393                                /*filter*/NULL, /*filterarg*/NULL,
1394                                (dpt->max_dccbs * sizeof(struct dpt_ccb))
1395                                + sizeof(dpt_sp_t),
1396                                /*nsegments*/1,
1397                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
1398                                /*flags*/0, &dpt->dccb_dmat) != 0) {
1399                 kprintf("dpt: bus_dma_tag_create(...,dpt->dccb_dmat) failed\n");
1400                 goto error_exit;
1401         }
1402
1403         dpt->init_level++;
1404
1405         /* Allocation for our ccbs and interrupt status packet */
1406         if (bus_dmamem_alloc(dpt->dccb_dmat, (void **)&dpt->dpt_dccbs,
1407                              BUS_DMA_NOWAIT, &dpt->dccb_dmamap) != 0) {
1408                 kprintf("dpt: bus_dmamem_alloc(dpt->dccb_dmat,...) failed\n");
1409                 goto error_exit;
1410         }
1411
1412         dpt->init_level++;
1413
1414         /* And permanently map them */
1415         bus_dmamap_load(dpt->dccb_dmat, dpt->dccb_dmamap,
1416                         dpt->dpt_dccbs,
1417                         (dpt->max_dccbs * sizeof(struct dpt_ccb))
1418                         + sizeof(dpt_sp_t),
1419                         dptmapmem, &dpt->dpt_ccb_busbase, /*flags*/0);
1420
1421         /* Clear them out. */
1422         bzero(dpt->dpt_dccbs,
1423               (dpt->max_dccbs * sizeof(struct dpt_ccb)) + sizeof(dpt_sp_t));
1424
1425         dpt->dpt_ccb_busend = dpt->dpt_ccb_busbase;
1426
1427         dpt->sp = (dpt_sp_t*)&dpt->dpt_dccbs[dpt->max_dccbs];
1428         dpt->sp_physaddr = dpt->dpt_ccb_busbase
1429                          + (dpt->max_dccbs * sizeof(dpt_ccb_t));
1430         dpt->init_level++;
1431
1432         /* Allocate our first batch of ccbs */
1433         if (dptallocccbs(dpt) == 0) {
1434                 kprintf("dpt: dptallocccbs(dpt) == 0\n");
1435                 return (2);
1436         }
1437
1438         /* Prepare for Target Mode */
1439         dpt->target_mode_enabled = 1;
1440
1441         /* Nuke excess spaces from inquiry information */
1442         strp = dpt->board_data.vendor;
1443         for (i = 0; i < sizeof(string_sizes); i++) {
1444                 index = string_sizes[i] - 1;
1445                 while (index && (strp[index] == ' '))
1446                         strp[index--] = '\0';
1447                 strp += string_sizes[i];
1448         }
1449
1450         kprintf("dpt%d: %.8s %.16s FW Rev. %.4s, ",
1451                dpt->unit, dpt->board_data.vendor,
1452                dpt->board_data.modelNum, dpt->board_data.firmware);
1453
1454         kprintf("%d channel%s, ", dpt->channels, dpt->channels > 1 ? "s" : "");
1455
1456         if (dpt->cache_type != DPT_NO_CACHE
1457          && dpt->cache_size != 0) {
1458                 kprintf("%s Cache, ",
1459                        dpt->cache_type == DPT_CACHE_WRITETHROUGH
1460                      ? "Write-Through" : "Write-Back");
1461         }
1462
1463         kprintf("%d CCBs\n", dpt->max_dccbs);
1464         return (0);
1465
1466 error_exit:
1467         return (1);
1468 }
1469
1470 int
1471 dpt_attach(dpt_softc_t *dpt)
1472 {
1473         struct cam_devq *devq;
1474         int i;
1475
1476         /*
1477          * Create the device queue for our SIM.
1478          */
1479         devq = cam_simq_alloc(dpt->max_dccbs);
1480         if (devq == NULL)
1481                 return (0);
1482
1483         for (i = 0; i < dpt->channels; i++) {
1484                 /*
1485                  * Construct our SIM entry
1486                  */
1487                 dpt->sims[i] = cam_sim_alloc(dpt_action, dpt_poll, "dpt",
1488                                              dpt, dpt->unit, &sim_mplock,
1489                                              /*untagged*/2,
1490                                              /*tagged*/dpt->max_dccbs, devq);
1491                 if (xpt_bus_register(dpt->sims[i], i) != CAM_SUCCESS) {
1492                         cam_sim_free(dpt->sims[i]);
1493                         break;
1494                 }
1495
1496                 if (xpt_create_path(&dpt->paths[i], /*periph*/NULL,
1497                                     cam_sim_path(dpt->sims[i]),
1498                                     CAM_TARGET_WILDCARD,
1499                                     CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
1500                         xpt_bus_deregister(cam_sim_path(dpt->sims[i]));
1501                         cam_sim_free(dpt->sims[i]);
1502                         break;
1503                 }
1504
1505         }
1506         cam_simq_release(devq);
1507         if (i > 0)
1508                 EVENTHANDLER_REGISTER(shutdown_post_sync, dptshutdown,
1509                                       dpt, SHUTDOWN_PRI_DRIVER);
1510         return (i);
1511 }
1512
1513
1514 /*
1515  * This is the interrupt handler for the DPT driver.
1516  */
1517 void
1518 dpt_intr(void *arg)
1519 {
1520         dpt_softc_t    *dpt;
1521         dpt_ccb_t      *dccb;
1522         union ccb      *ccb;
1523         u_int           status;
1524         u_int           aux_status;
1525         u_int           hba_stat;
1526         u_int           scsi_stat;
1527         u_int32_t       residue_len;    /* Number of bytes not transferred */
1528
1529         dpt = (dpt_softc_t *)arg;
1530
1531         /* First order of business is to check if this interrupt is for us */
1532         while (((aux_status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ) != 0) {
1533
1534                 /*
1535                  * What we want to do now, is to capture the status, all of it,
1536                  * move it where it belongs, wake up whoever sleeps waiting to
1537                  * process this result, and get out of here.
1538                  */
1539                 if (dpt->sp->ccb_busaddr < dpt->dpt_ccb_busbase
1540                  || dpt->sp->ccb_busaddr >= dpt->dpt_ccb_busend) {
1541                         kprintf("Encountered bogus status packet\n");
1542                         status = dpt_inb(dpt, HA_RSTATUS);
1543                         return;
1544                 }
1545
1546                 dccb = dptccbptov(dpt, dpt->sp->ccb_busaddr);
1547
1548                 dpt->sp->ccb_busaddr = ~0;
1549
1550                 /* Ignore status packets with EOC not set */
1551                 if (dpt->sp->EOC == 0) {
1552                         kprintf("dpt%d ERROR: Request %d received with "
1553                                "clear EOC.\n     Marking as LOST.\n",
1554                                dpt->unit, dccb->transaction_id);
1555
1556 #ifdef DPT_HANDLE_TIMEOUTS
1557                         dccb->state |= DPT_CCB_STATE_MARKED_LOST;
1558 #endif
1559                         /* This CLEARS the interrupt! */
1560                         status = dpt_inb(dpt, HA_RSTATUS);
1561                         continue;
1562                 }
1563                 dpt->sp->EOC = 0;
1564
1565                 /*
1566                  * Double buffer the status information so the hardware can
1567                  * work on updating the status packet while we decifer the
1568                  * one we were just interrupted for.
1569                  * According to Mark Salyzyn, we only need few pieces of it.
1570                  */
1571                 hba_stat = dpt->sp->hba_stat;
1572                 scsi_stat = dpt->sp->scsi_stat;
1573                 residue_len = dpt->sp->residue_len;
1574
1575                 /* Clear interrupts, check for error */
1576                 if ((status = dpt_inb(dpt, HA_RSTATUS)) & HA_SERROR) {
1577                         /*
1578                          * Error Condition. Check for magic cookie. Exit
1579                          * this test on earliest sign of non-reset condition
1580                          */
1581
1582                         /* Check that this is not a board reset interrupt */
1583                         if (dpt_just_reset(dpt)) {
1584                                 kprintf("dpt%d: HBA rebooted.\n"
1585                                        "      All transactions should be "
1586                                        "resubmitted\n",
1587                                        dpt->unit);
1588
1589                                 kprintf("dpt%d: >>---->>  This is incomplete, "
1590                                        "fix me....  <<----<<", dpt->unit);
1591                                 panic("DPT Rebooted");
1592
1593                         }
1594                 }
1595                 /* Process CCB */
1596                 ccb = dccb->ccb;
1597                 callout_stop(&ccb->ccb_h.timeout_ch);
1598                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
1599                         bus_dmasync_op_t op;
1600
1601                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
1602                                 op = BUS_DMASYNC_POSTREAD;
1603                         else
1604                                 op = BUS_DMASYNC_POSTWRITE;
1605                         bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op);
1606                         bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap);
1607                 }
1608
1609                 /* Common Case inline... */
1610                 if (hba_stat == HA_NO_ERROR) {
1611                         ccb->csio.scsi_status = scsi_stat;
1612                         ccb->ccb_h.status = 0;
1613                         switch (scsi_stat) {
1614                         case SCSI_STATUS_OK:
1615                                 ccb->ccb_h.status |= CAM_REQ_CMP;
1616                                 break;
1617                         case SCSI_STATUS_CHECK_COND:
1618                         case SCSI_STATUS_CMD_TERMINATED:
1619                                 bcopy(&dccb->sense_data, &ccb->csio.sense_data,
1620                                       ccb->csio.sense_len);
1621                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
1622                                 /* FALLTHROUGH */
1623                         default:
1624                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
1625                                 /* XXX Freeze DevQ */
1626                                 break;
1627                         }
1628                         ccb->csio.resid = residue_len;
1629                         dptfreeccb(dpt, dccb);
1630                         xpt_done(ccb);
1631                 } else {
1632                         dptprocesserror(dpt, dccb, ccb, hba_stat, scsi_stat,
1633                                         residue_len);
1634                 }
1635         }
1636 }
1637
1638 static void
1639 dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb, union ccb *ccb,
1640                 u_int hba_stat, u_int scsi_stat, u_int32_t resid)
1641 {
1642         ccb->csio.resid = resid;
1643         switch (hba_stat) {
1644         case HA_ERR_SEL_TO:
1645                 ccb->ccb_h.status = CAM_SEL_TIMEOUT;
1646                 break;
1647         case HA_ERR_CMD_TO:
1648                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1649                 break;
1650         case HA_SCSIBUS_RESET:
1651         case HA_HBA_POWER_UP:   /* Similar effect to a bus reset??? */
1652                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
1653                 break;
1654         case HA_CP_ABORTED:
1655         case HA_CP_RESET:       /* XXX ??? */
1656         case HA_CP_ABORT_NA:    /* XXX ??? */
1657         case HA_CP_RESET_NA:    /* XXX ??? */
1658                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)
1659                         ccb->ccb_h.status = CAM_REQ_ABORTED;
1660                 break;
1661         case HA_PCI_PARITY:
1662         case HA_PCI_MABORT:
1663         case HA_PCI_TABORT:
1664         case HA_PCI_STABORT:
1665         case HA_BUS_PARITY:
1666         case HA_PARITY_ERR:
1667         case HA_ECC_ERR:
1668                 ccb->ccb_h.status = CAM_UNCOR_PARITY;
1669                 break;
1670         case HA_UNX_MSGRJCT:
1671                 ccb->ccb_h.status = CAM_MSG_REJECT_REC;
1672                 break;
1673         case HA_UNX_BUSPHASE:
1674                 ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
1675                 break;
1676         case HA_UNX_BUS_FREE:
1677                 ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
1678                 break;
1679         case HA_SCSI_HUNG:
1680         case HA_RESET_STUCK:
1681                 /*
1682                  * Dead???  Can the controller get unstuck
1683                  * from these conditions
1684                  */
1685                 ccb->ccb_h.status = CAM_NO_HBA;
1686                 break;
1687         case HA_RSENSE_FAIL:
1688                 ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
1689                 break;
1690         default:
1691                 kprintf("dpt%d: Undocumented Error %x\n", dpt->unit, hba_stat);
1692                 kprintf("Please mail this message to shimon@simon-shapiro.org\n");
1693                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1694                 break;
1695         }
1696         dptfreeccb(dpt, dccb);
1697         xpt_done(ccb);
1698 }
1699
1700 static void
1701 dpttimeout(void *arg)
1702 {
1703         struct dpt_ccb   *dccb;
1704         union  ccb       *ccb;
1705         struct dpt_softc *dpt;
1706
1707         dccb = (struct dpt_ccb *)arg;
1708         ccb = dccb->ccb;
1709         dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr;
1710         xpt_print_path(ccb->ccb_h.path);
1711         kprintf("CCB %p - timed out\n", (void *)dccb);
1712
1713         crit_enter();
1714
1715         /*
1716          * Try to clear any pending jobs.  FreeBSD will loose interrupts,
1717          * leaving the controller suspended, and commands timed-out.
1718          * By calling the interrupt handler, any command thus stuck will be
1719          * completed.
1720          */
1721         dpt_intr(dpt);
1722
1723         if ((dccb->state & DCCB_ACTIVE) == 0) {
1724                 xpt_print_path(ccb->ccb_h.path);
1725                 kprintf("CCB %p - timed out CCB already completed\n",
1726                        (void *)dccb);
1727                 crit_exit();
1728                 return;
1729         }
1730
1731         /* Abort this particular command.  Leave all others running */
1732         dpt_send_immediate(dpt, &dccb->eata_ccb, dccb->eata_ccb.cp_busaddr,
1733                            /*retries*/20000, EATA_SPECIFIC_ABORT, 0, 0);
1734         ccb->ccb_h.status = CAM_CMD_TIMEOUT;
1735         crit_exit();
1736 }
1737
1738 /*
1739  * Shutdown the controller and ensure that the cache is completely flushed.
1740  * Called from the shutdown_final event after all disk access has completed.
1741  */
1742 static void
1743 dptshutdown(void *arg, int howto)
1744 {
1745         dpt_softc_t *dpt;
1746
1747         dpt = (dpt_softc_t *)arg;
1748
1749         kprintf("dpt%d: Shutting down (mode %x) HBA.    Please wait...\n",
1750                dpt->unit, howto);
1751
1752         /*
1753          * What we do for a shutdown, is give the DPT early power loss warning
1754          */
1755         dpt_send_immediate(dpt, NULL, 0, EATA_POWER_OFF_WARN, 0, 0, 0);
1756         DELAY(1000 * 1000 * 5);
1757         kprintf("dpt%d: Controller was warned of shutdown and is now "
1758                "disabled\n", dpt->unit);
1759 }
1760
1761 /*============================================================================*/
1762
1763 #if 0
1764 #ifdef DPT_RESET_HBA
1765
1766 /*
1767 **      Function name : dpt_reset_hba
1768 **
1769 **      Description : Reset the HBA and properly discard all pending work
1770 **      Input :       Softc
1771 **      Output :      Nothing
1772 */
1773 static void
1774 dpt_reset_hba(dpt_softc_t *dpt)
1775 {
1776         eata_ccb_t       *ccb;
1777         dpt_ccb_t         dccb, *dccbp;
1778         int               result;
1779         struct scsi_xfer *xs;
1780
1781         /* Prepare a control block.  The SCSI command part is immaterial */
1782         dccb.xs = NULL;
1783         dccb.flags = 0;
1784         dccb.state = DPT_CCB_STATE_NEW;
1785         dccb.std_callback = NULL;
1786         dccb.wrbuff_callback = NULL;
1787
1788         ccb = &dccb.eata_ccb;
1789         ccb->CP_OpCode = EATA_CMD_RESET;
1790         ccb->SCSI_Reset = 0;
1791         ccb->HBA_Init = 1;
1792         ccb->Auto_Req_Sen = 1;
1793         ccb->cp_id = 0; /* Should be ignored */
1794         ccb->DataIn = 1;
1795         ccb->DataOut = 0;
1796         ccb->Interpret = 1;
1797         ccb->reqlen = htonl(sizeof(struct scsi_sense_data));
1798         ccb->cp_statDMA = htonl(vtophys(&ccb->cp_statDMA));
1799         ccb->cp_reqDMA = htonl(vtophys(&ccb->cp_reqDMA));
1800         ccb->cp_viraddr = (u_int32_t) & ccb;
1801
1802         ccb->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1803         ccb->cp_scsi_cmd = 0;  /* Should be ignored */
1804
1805         /* Lock up the submitted queue.  We are very persistant here */
1806         crit_enter();
1807         while (dpt->queue_status & DPT_SUBMITTED_QUEUE_ACTIVE) {
1808                 DELAY(100);
1809         }
1810
1811         dpt->queue_status |= DPT_SUBMITTED_QUEUE_ACTIVE;
1812         crit_exit();
1813
1814         /* Send the RESET message */
1815         if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1816                                             EATA_CMD_RESET, 0, 0, 0, 0)) != 0) {
1817                 kprintf("dpt%d: Failed to send the RESET message.\n"
1818                        "      Trying cold boot (ouch!)\n", dpt->unit);
1819
1820
1821                 if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb,
1822                                                     EATA_COLD_BOOT, 0, 0,
1823                                                     0, 0)) != 0) {
1824                         panic("dpt%d:  Faild to cold boot the HBA\n",
1825                               dpt->unit);
1826                 }
1827 #ifdef DPT_MEASURE_PERFORMANCE
1828                 dpt->performance.cold_boots++;
1829 #endif /* DPT_MEASURE_PERFORMANCE */
1830         }
1831
1832 #ifdef DPT_MEASURE_PERFORMANCE
1833         dpt->performance.warm_starts++;
1834 #endif /* DPT_MEASURE_PERFORMANCE */
1835
1836         kprintf("dpt%d:  Aborting pending requests.  O/S should re-submit\n",
1837                dpt->unit);
1838
1839         while ((dccbp = TAILQ_FIRST(&dpt->completed_ccbs)) != NULL) {
1840                 struct scsi_xfer *xs = dccbp->xs;
1841
1842                 /* Not all transactions have xs structs */
1843                 if (xs != NULL) {
1844                         /* Tell the kernel proper this did not complete well */
1845                         xs->error |= XS_SELTIMEOUT;
1846                         xs->flags |= SCSI_ITSDONE;
1847                         scsi_done(xs);
1848                 }
1849
1850                 dpt_Qremove_submitted(dpt, dccbp);
1851
1852                 /* Remember, Callbacks are NOT in the standard queue */
1853                 if (dccbp->std_callback != NULL) {
1854                         (dccbp->std_callback)(dpt, dccbp->eata_ccb.cp_channel,
1855                                                dccbp);
1856                 } else {
1857                         crit_enter();
1858                         dpt_Qpush_free(dpt, dccbp);
1859                         crit_exit();
1860                 }
1861         }
1862
1863         kprintf("dpt%d: reset done aborting all pending commands\n", dpt->unit);
1864         dpt->queue_status &= ~DPT_SUBMITTED_QUEUE_ACTIVE;
1865 }
1866
1867 #endif /* DPT_RESET_HBA */
1868
1869 /*
1870  * Build a Command Block for target mode READ/WRITE BUFFER,
1871  * with the ``sync'' bit ON.
1872  *
1873  * Although the length and offset are 24 bit fields in the command, they cannot
1874  * exceed 8192 bytes, so we take them as short integers andcheck their range.
1875  * If they are sensless, we round them to zero offset, maximum length and
1876  * complain.
1877  */
1878
1879 static void
1880 dpt_target_ccb(dpt_softc_t * dpt, int bus, u_int8_t target, u_int8_t lun,
1881                dpt_ccb_t * ccb, int mode, u_int8_t command,
1882                u_int16_t length, u_int16_t offset)
1883 {
1884         eata_ccb_t     *cp;
1885
1886         if ((length + offset) > DPT_MAX_TARGET_MODE_BUFFER_SIZE) {
1887                 kprintf("dpt%d:  Length of %d, and offset of %d are wrong\n",
1888                        dpt->unit, length, offset);
1889                 length = DPT_MAX_TARGET_MODE_BUFFER_SIZE;
1890                 offset = 0;
1891         }
1892         ccb->xs = NULL;
1893         ccb->flags = 0;
1894         ccb->state = DPT_CCB_STATE_NEW;
1895         ccb->std_callback = (ccb_callback) dpt_target_done;
1896         ccb->wrbuff_callback = NULL;
1897
1898         cp = &ccb->eata_ccb;
1899         cp->CP_OpCode = EATA_CMD_DMA_SEND_CP;
1900         cp->SCSI_Reset = 0;
1901         cp->HBA_Init = 0;
1902         cp->Auto_Req_Sen = 1;
1903         cp->cp_id = target;
1904         cp->DataIn = 1;
1905         cp->DataOut = 0;
1906         cp->Interpret = 0;
1907         cp->reqlen = htonl(sizeof(struct scsi_sense_data));
1908         cp->cp_statDMA = htonl(vtophys(&cp->cp_statDMA));
1909         cp->cp_reqDMA = htonl(vtophys(&cp->cp_reqDMA));
1910         cp->cp_viraddr = (u_int32_t) & ccb;
1911
1912         cp->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
1913
1914         cp->cp_scsi_cmd = command;
1915         cp->cp_cdb[1] = (u_int8_t) (mode & SCSI_TM_MODE_MASK);
1916         cp->cp_lun = lun;       /* Order is important here! */
1917         cp->cp_cdb[2] = 0x00;   /* Buffer Id, only 1 :-( */
1918         cp->cp_cdb[3] = (length >> 16) & 0xFF;  /* Buffer offset MSB */
1919         cp->cp_cdb[4] = (length >> 8) & 0xFF;
1920         cp->cp_cdb[5] = length & 0xFF;
1921         cp->cp_cdb[6] = (length >> 16) & 0xFF;  /* Length MSB */
1922         cp->cp_cdb[7] = (length >> 8) & 0xFF;
1923         cp->cp_cdb[8] = length & 0xFF;  /* Length LSB */
1924         cp->cp_cdb[9] = 0;      /* No sync, no match bits */
1925
1926         /*
1927          * This could be optimized to live in dpt_register_buffer.
1928          * We keep it here, just in case the kernel decides to reallocate pages
1929          */
1930         if (dpt_scatter_gather(dpt, ccb, DPT_RW_BUFFER_SIZE,
1931                                dpt->rw_buffer[bus][target][lun])) {
1932                 kprintf("dpt%d: Failed to setup Scatter/Gather for "
1933                        "Target-Mode buffer\n", dpt->unit);
1934         }
1935 }
1936
1937 /* Setup a target mode READ command */
1938
1939 static void
1940 dpt_set_target(int redo, dpt_softc_t * dpt,
1941                u_int8_t bus, u_int8_t target, u_int8_t lun, int mode,
1942                u_int16_t length, u_int16_t offset, dpt_ccb_t * ccb)
1943 {
1944         if (dpt->target_mode_enabled) {
1945                 crit_enter();
1946
1947                 if (!redo)
1948                         dpt_target_ccb(dpt, bus, target, lun, ccb, mode,
1949                                        SCSI_TM_READ_BUFFER, length, offset);
1950
1951                 ccb->transaction_id = ++dpt->commands_processed;
1952
1953 #ifdef DPT_MEASURE_PERFORMANCE
1954                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
1955                 ccb->command_started = microtime_now;
1956 #endif
1957                 dpt_Qadd_waiting(dpt, ccb);
1958                 dpt_sched_queue(dpt);
1959
1960                 crit_exit();
1961         } else {
1962                 kprintf("dpt%d:  Target Mode Request, but Target Mode is OFF\n",
1963                        dpt->unit);
1964         }
1965 }
1966
1967 /*
1968  * Schedule a buffer to be sent to another target.
1969  * The work will be scheduled and the callback provided will be called when
1970  * the work is actually done.
1971  *
1972  * Please NOTE:  ``Anyone'' can send a buffer, but only registered clients
1973  * get notified of receipt of buffers.
1974  */
1975
1976 int
1977 dpt_send_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
1978                 u_int8_t mode, u_int16_t length, u_int16_t offset, void *data,
1979                 buff_wr_done callback)
1980 {
1981         dpt_softc_t    *dpt;
1982         dpt_ccb_t      *ccb = NULL;
1983
1984         /* This is an external call.  Be a bit paranoid */
1985         for (dpt = TAILQ_FIRST(&dpt_softc_list);
1986              dpt != NULL;
1987              dpt = TAILQ_NEXT(dpt, links)) {
1988                 if (dpt->unit == unit)
1989                         goto valid_unit;
1990         }
1991
1992         return (INVALID_UNIT);
1993
1994 valid_unit:
1995
1996         if (dpt->target_mode_enabled) {
1997                 if ((channel >= dpt->channels) || (target > dpt->max_id) ||
1998                     (lun > dpt->max_lun)) {
1999                         return (INVALID_SENDER);
2000                 }
2001                 if ((dpt->rw_buffer[channel][target][lun] == NULL) ||
2002                     (dpt->buffer_receiver[channel][target][lun] == NULL))
2003                         return (NOT_REGISTERED);
2004
2005                 crit_enter();
2006                 /* Process the free list */
2007                 if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2008                         kprintf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2009                                "             Please try later\n",
2010                                dpt->unit);
2011                         crit_exit();
2012                         return (NO_RESOURCES);
2013                 }
2014                 /* Now grab the newest CCB */
2015                 if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2016                         crit_exit();
2017                         panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2018                 }
2019                 crit_exit();
2020
2021                 bcopy(dpt->rw_buffer[channel][target][lun] + offset, data, length);
2022                 dpt_target_ccb(dpt, channel, target, lun, ccb, mode,
2023                                            SCSI_TM_WRITE_BUFFER,
2024                                            length, offset);
2025                 ccb->std_callback = (ccb_callback) callback; /* Potential trouble */
2026
2027                 crit_enter();
2028                 ccb->transaction_id = ++dpt->commands_processed;
2029
2030 #ifdef DPT_MEASURE_PERFORMANCE
2031                 dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++;
2032                 ccb->command_started = microtime_now;
2033 #endif
2034                 dpt_Qadd_waiting(dpt, ccb);
2035                 dpt_sched_queue(dpt);
2036
2037                 crit_exit();
2038                 return (0);
2039         }
2040         return (DRIVER_DOWN);
2041 }
2042
2043 static void
2044 dpt_target_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2045 {
2046         eata_ccb_t     *cp;
2047
2048         cp = &ccb->eata_ccb;
2049
2050         /*
2051          * Remove the CCB from the waiting queue.
2052          *  We do NOT put it back on the free, etc., queues as it is a special
2053          * ccb, owned by the dpt_softc of this unit.
2054          */
2055         crit_enter();
2056         dpt_Qremove_completed(dpt, ccb);
2057         crit_exit();
2058
2059 #define br_channel           (ccb->eata_ccb.cp_channel)
2060 #define br_target            (ccb->eata_ccb.cp_id)
2061 #define br_lun               (ccb->eata_ccb.cp_LUN)
2062 #define br_index             [br_channel][br_target][br_lun]
2063 #define read_buffer_callback (dpt->buffer_receiver br_index )
2064 #define read_buffer          (dpt->rw_buffer[br_channel][br_target][br_lun])
2065 #define cb(offset)           (ccb->eata_ccb.cp_cdb[offset])
2066 #define br_offset            ((cb(3) << 16) | (cb(4) << 8) | cb(5))
2067 #define br_length            ((cb(6) << 16) | (cb(7) << 8) | cb(8))
2068
2069         /* Different reasons for being here, you know... */
2070         switch (ccb->eata_ccb.cp_scsi_cmd) {
2071         case SCSI_TM_READ_BUFFER:
2072                 if (read_buffer_callback != NULL) {
2073                         /* This is a buffer generated by a kernel process */
2074                         read_buffer_callback(dpt->unit, br_channel,
2075                                              br_target, br_lun,
2076                                              read_buffer,
2077                                              br_offset, br_length);
2078                 } else {
2079                         /*
2080                          * This is a buffer waited for by a user (sleeping)
2081                          * command
2082                          */
2083                         wakeup(ccb);
2084                 }
2085
2086                 /* We ALWAYS re-issue the same command; args are don't-care  */
2087                 dpt_set_target(1, 0, 0, 0, 0, 0, 0, 0, 0);
2088                 break;
2089
2090         case SCSI_TM_WRITE_BUFFER:
2091                 (ccb->wrbuff_callback) (dpt->unit, br_channel, br_target,
2092                                         br_offset, br_length,
2093                                         br_lun, ccb->status_packet.hba_stat);
2094                 break;
2095         default:
2096                 kprintf("dpt%d:  %s is an unsupported command for target mode\n",
2097                        dpt->unit, scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd));
2098         }
2099         crit_enter();
2100         dpt->target_ccb[br_channel][br_target][br_lun] = NULL;
2101         dpt_Qpush_free(dpt, ccb);
2102         crit_exit();
2103 }
2104
2105
2106 /*
2107  * Use this function to register a client for a buffer read target operation.
2108  * The function you register will be called every time a buffer is received
2109  * by the target mode code.
2110  */
2111 dpt_rb_t
2112 dpt_register_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun,
2113                     u_int8_t mode, u_int16_t length, u_int16_t offset,
2114                     dpt_rec_buff callback, dpt_rb_op_t op)
2115 {
2116         dpt_softc_t    *dpt;
2117         dpt_ccb_t      *ccb = NULL;
2118
2119         for (dpt = TAILQ_FIRST(&dpt_softc_list);
2120              dpt != NULL;
2121              dpt = TAILQ_NEXT(dpt, links)) {
2122                 if (dpt->unit == unit)
2123                         goto valid_unit;
2124         }
2125
2126         return (INVALID_UNIT);
2127
2128 valid_unit:
2129
2130         if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
2131                 return (DRIVER_DOWN);
2132
2133         if ((channel > (dpt->channels - 1)) || (target > (dpt->max_id - 1)) ||
2134             (lun > (dpt->max_lun - 1)))
2135                 return (INVALID_SENDER);
2136
2137         if (dpt->buffer_receiver[channel][target][lun] == NULL) {
2138                 if (op == REGISTER_BUFFER) {
2139                         /* Assign the requested callback */
2140                         dpt->buffer_receiver[channel][target][lun] = callback;
2141                         /* Get a CCB */
2142                         crit_enter();
2143
2144                         /* Process the free list */
2145                         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2146                                 kprintf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2147                                        "             Please try later\n",
2148                                        dpt->unit);
2149                                 crit_exit();
2150                                 return (NO_RESOURCES);
2151                         }
2152                         /* Now grab the newest CCB */
2153                         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2154                                 crit_exit();
2155                                 panic("dpt%d: Got a NULL CCB from pop_free()\n",
2156                                       dpt->unit);
2157                         }
2158                         crit_exit();
2159
2160                         /* Clean up the leftover of the previous tenant */
2161                         ccb->status = DPT_CCB_STATE_NEW;
2162                         dpt->target_ccb[channel][target][lun] = ccb;
2163
2164                         dpt->rw_buffer[channel][target][lun] =
2165                                 kmalloc(DPT_RW_BUFFER_SIZE, M_DEVBUF, M_INTWAIT);
2166                         dpt_set_target(0, dpt, channel, target, lun, mode,
2167                                        length, offset, ccb);
2168                         return (SUCCESSFULLY_REGISTERED);
2169                 } else
2170                         return (NOT_REGISTERED);
2171         } else {
2172                 if (op == REGISTER_BUFFER) {
2173                         if (dpt->buffer_receiver[channel][target][lun] == callback)
2174                                 return (ALREADY_REGISTERED);
2175                         else
2176                                 return (REGISTERED_TO_ANOTHER);
2177                 } else {
2178                         if (dpt->buffer_receiver[channel][target][lun] == callback) {
2179                                 dpt->buffer_receiver[channel][target][lun] = NULL;
2180                                 crit_enter();
2181                                 dpt_Qpush_free(dpt, ccb);
2182                                 crit_exit();
2183                                 kfree(dpt->rw_buffer[channel][target][lun], M_DEVBUF);
2184                                 return (SUCCESSFULLY_REGISTERED);
2185                         } else
2186                                 return (INVALID_CALLBACK);
2187                 }
2188
2189         }
2190 }
2191
2192 /* Return the state of the blinking DPT LED's */
2193 u_int8_t
2194 dpt_blinking_led(dpt_softc_t * dpt)
2195 {
2196         int             ndx;
2197         u_int32_t       state;
2198         u_int32_t       previous;
2199         u_int8_t        result;
2200
2201         crit_enter();
2202
2203         result = 0;
2204
2205         for (ndx = 0, state = 0, previous = 0;
2206              (ndx < 10) && (state != previous);
2207              ndx++) {
2208                 previous = state;
2209                 state = dpt_inl(dpt, 1);
2210         }
2211
2212         if ((state == previous) && (state == DPT_BLINK_INDICATOR))
2213                 result = dpt_inb(dpt, 5);
2214
2215         crit_exit();
2216         return (result);
2217 }
2218
2219 /*
2220  * Execute a command which did not come from the kernel's SCSI layer.
2221  * The only way to map user commands to bus and target is to comply with the
2222  * standard DPT wire-down scheme:
2223  */
2224 int
2225 dpt_user_cmd(dpt_softc_t * dpt, eata_pt_t * user_cmd,
2226              caddr_t cmdarg, int minor_no)
2227 {
2228         dpt_ccb_t *ccb;
2229         void      *data;
2230         int        channel, target, lun;
2231         int        huh;
2232         int        result;
2233         int        submitted;
2234
2235         data = NULL;
2236         channel = minor2hba(minor_no);
2237         target = minor2target(minor_no);
2238         lun = minor2lun(minor_no);
2239
2240         if ((channel > (dpt->channels - 1))
2241          || (target > dpt->max_id)
2242          || (lun > dpt->max_lun))
2243                 return (ENXIO);
2244
2245         if (target == dpt->sc_scsi_link[channel].adapter_targ) {
2246                 /* This one is for the controller itself */
2247                 if ((user_cmd->eataID[0] != 'E')
2248                  || (user_cmd->eataID[1] != 'A')
2249                  || (user_cmd->eataID[2] != 'T')
2250                  || (user_cmd->eataID[3] != 'A')) {
2251                         return (ENXIO);
2252                 }
2253         }
2254         /* Get a DPT CCB, so we can prepare a command */
2255         crit_enter();
2256
2257         /* Process the free list */
2258         if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
2259                 kprintf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
2260                        "             Please try later\n",
2261                        dpt->unit);
2262                 crit_exit();
2263                 return (EFAULT);
2264         }
2265         /* Now grab the newest CCB */
2266         if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
2267                 crit_exit();
2268                 panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
2269         } else {
2270                 crit_exit();
2271                 /* Clean up the leftover of the previous tenant */
2272                 ccb->status = DPT_CCB_STATE_NEW;
2273         }
2274
2275         bcopy((caddr_t) & user_cmd->command_packet, (caddr_t) & ccb->eata_ccb,
2276               sizeof(eata_ccb_t));
2277
2278         /* We do not want to do user specified scatter/gather.  Why?? */
2279         if (ccb->eata_ccb.scatter == 1)
2280                 return (EINVAL);
2281
2282         ccb->eata_ccb.Auto_Req_Sen = 1;
2283         ccb->eata_ccb.reqlen = htonl(sizeof(struct scsi_sense_data));
2284         ccb->eata_ccb.cp_datalen = htonl(sizeof(ccb->eata_ccb.cp_datalen));
2285         ccb->eata_ccb.cp_dataDMA = htonl(vtophys(ccb->eata_ccb.cp_dataDMA));
2286         ccb->eata_ccb.cp_statDMA = htonl(vtophys(&ccb->eata_ccb.cp_statDMA));
2287         ccb->eata_ccb.cp_reqDMA = htonl(vtophys(&ccb->eata_ccb.cp_reqDMA));
2288         ccb->eata_ccb.cp_viraddr = (u_int32_t) & ccb;
2289
2290         if (ccb->eata_ccb.DataIn || ccb->eata_ccb.DataOut) {
2291                 /* Data I/O is involved in this command.  Alocate buffer */
2292                 if (ccb->eata_ccb.cp_datalen > PAGE_SIZE) {
2293                         data = contigmalloc(ccb->eata_ccb.cp_datalen,
2294                                             M_TEMP, M_WAITOK, 0, ~0,
2295                                             ccb->eata_ccb.cp_datalen,
2296                                             0x10000);
2297                 } else {
2298                         data = kmalloc(ccb->eata_ccb.cp_datalen, M_TEMP,
2299                                       M_WAITOK);
2300                 }
2301
2302                 if (data == NULL) {
2303                         kprintf("dpt%d: Cannot allocate %d bytes "
2304                                "for EATA command\n", dpt->unit,
2305                                ccb->eata_ccb.cp_datalen);
2306                         return (EFAULT);
2307                 }
2308 #define usr_cmd_DMA (caddr_t)user_cmd->command_packet.cp_dataDMA
2309                 if (ccb->eata_ccb.DataIn == 1) {
2310                         if (copyin(usr_cmd_DMA,
2311                                    data, ccb->eata_ccb.cp_datalen) == -1)
2312                                 return (EFAULT);
2313                 }
2314         } else {
2315                 /* No data I/O involved here.  Make sure the DPT knows that */
2316                 ccb->eata_ccb.cp_datalen = 0;
2317                 data = NULL;
2318         }
2319
2320         if (ccb->eata_ccb.FWNEST == 1)
2321                 ccb->eata_ccb.FWNEST = 0;
2322
2323         if (ccb->eata_ccb.cp_datalen != 0) {
2324                 if (dpt_scatter_gather(dpt, ccb, ccb->eata_ccb.cp_datalen,
2325                                        data) != 0) {
2326                         if (data != NULL)
2327                                 kfree(data, M_TEMP);
2328                         return (EFAULT);
2329                 }
2330         }
2331         /**
2332          * We are required to quiet a SCSI bus.
2333          * since we do not queue comands on a bus basis,
2334          * we wait for ALL commands on a controller to complete.
2335          * In the mean time, sched_queue() will not schedule new commands.
2336          */
2337         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2338             && (ccb->eata_ccb.cp_cdb[2] == BUS_QUIET)) {
2339                 /* We wait for ALL traffic for this HBa to subside */
2340                 crit_enter();
2341                 dpt->state |= DPT_HA_QUIET;
2342                 crit_exit();
2343
2344                 while ((submitted = dpt->submitted_ccbs_count) != 0) {
2345                         huh = tsleep((void *) dpt, PCATCH, "dptqt", 100 * hz);
2346                         switch (huh) {
2347                         case 0:
2348                                 /* Wakeup call received */
2349                                 break;
2350                         case EWOULDBLOCK:
2351                                 /* Timer Expired */
2352                                 break;
2353                         default:
2354                                 /* anything else */
2355                                 break;
2356                         }
2357                 }
2358         }
2359         /* Resume normal operation */
2360         if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
2361             && (ccb->eata_ccb.cp_cdb[2] == BUS_UNQUIET)) {
2362                 crit_enter();
2363                 dpt->state &= ~DPT_HA_QUIET;
2364                 crit_exit();
2365         }
2366         /**
2367          * Schedule the command and submit it.
2368          * We bypass dpt_sched_queue, as it will block on DPT_HA_QUIET
2369          */
2370         ccb->xs = NULL;
2371         ccb->flags = 0;
2372         ccb->eata_ccb.Auto_Req_Sen = 1; /* We always want this feature */
2373
2374         ccb->transaction_id = ++dpt->commands_processed;
2375         ccb->std_callback = (ccb_callback) dpt_user_cmd_done;
2376         ccb->result = (u_int32_t) & cmdarg;
2377         ccb->data = data;
2378
2379 #ifdef DPT_MEASURE_PERFORMANCE
2380         ++dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd];
2381         ccb->command_started = microtime_now;
2382 #endif
2383         crit_enter();
2384         dpt_Qadd_waiting(dpt, ccb);
2385         crit_exit();
2386
2387         dpt_sched_queue(dpt);
2388
2389         /* Wait for the command to complete */
2390         (void) tsleep((void *) ccb, PCATCH, "dptucw", 100 * hz);
2391
2392         /* Free allocated memory */
2393         if (data != NULL)
2394                 kfree(data, M_TEMP);
2395
2396         return (0);
2397 }
2398
2399 static void
2400 dpt_user_cmd_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
2401 {
2402         u_int32_t       result;
2403         caddr_t         cmd_arg;
2404
2405         crit_enter();
2406
2407         /**
2408          * If Auto Request Sense is on, copyout the sense struct
2409          */
2410 #define usr_pckt_DMA    (caddr_t)(intptr_t)ntohl(ccb->eata_ccb.cp_reqDMA)
2411 #define usr_pckt_len    ntohl(ccb->eata_ccb.cp_datalen)
2412         if (ccb->eata_ccb.Auto_Req_Sen == 1) {
2413                 if (copyout((caddr_t) & ccb->sense_data, usr_pckt_DMA,
2414                             sizeof(struct scsi_sense_data))) {
2415                         ccb->result = EFAULT;
2416                         dpt_Qpush_free(dpt, ccb);
2417                         crit_exit();
2418                         wakeup(ccb);
2419                         return;
2420                 }
2421         }
2422         /* If DataIn is on, copyout the data */
2423         if ((ccb->eata_ccb.DataIn == 1)
2424             && (ccb->status_packet.hba_stat == HA_NO_ERROR)) {
2425                 if (copyout(ccb->data, usr_pckt_DMA, usr_pckt_len)) {
2426                         dpt_Qpush_free(dpt, ccb);
2427                         ccb->result = EFAULT;
2428
2429                         crit_exit();
2430                         wakeup(ccb);
2431                         return;
2432                 }
2433         }
2434         /* Copyout the status */
2435         result = ccb->status_packet.hba_stat;
2436         cmd_arg = (caddr_t) ccb->result;
2437
2438         if (copyout((caddr_t) & result, cmd_arg, sizeof(result))) {
2439                 dpt_Qpush_free(dpt, ccb);
2440                 ccb->result = EFAULT;
2441                 crit_exit();
2442                 wakeup(ccb);
2443                 return;
2444         }
2445         /* Put the CCB back in the freelist */
2446         ccb->state |= DPT_CCB_STATE_COMPLETED;
2447         dpt_Qpush_free(dpt, ccb);
2448
2449         /* Free allocated memory */
2450         crit_exit();
2451         return;
2452 }
2453
2454 #ifdef DPT_HANDLE_TIMEOUTS
2455 /**
2456  * This function walks down the SUBMITTED queue.
2457  * Every request that is too old gets aborted and marked.
2458  * Since the DPT will complete (interrupt) immediately (what does that mean?),
2459  * We just walk the list, aborting old commands and marking them as such.
2460  * The dpt_complete function will get rid of the that were interrupted in the
2461  * normal manner.
2462  *
2463  * This function needs to run at splcam(), as it interacts with the submitted
2464  * queue, as well as the completed and free queues.  Just like dpt_intr() does.
2465  * To run it at any ISPL other than that of dpt_intr(), will mean that dpt_intr
2466  * willbe able to pre-empt it, grab a transaction in progress (towards
2467  * destruction) and operate on it.  The state of this transaction will be not
2468  * very clear.
2469  * The only other option, is to lock it only as long as necessary but have
2470  * dpt_intr() spin-wait on it. In a UP environment this makes no sense and in
2471  * a SMP environment, the advantage is dubvious for a function that runs once
2472  * every ten seconds for few microseconds and, on systems with healthy
2473  * hardware, does not do anything anyway.
2474  */
2475
2476 static void
2477 dpt_handle_timeouts(dpt_softc_t * dpt)
2478 {
2479         dpt_ccb_t      *ccb;
2480
2481         crit_enter();
2482
2483         if (dpt->state & DPT_HA_TIMEOUTS_ACTIVE) {
2484                 kprintf("dpt%d WARNING: Timeout Handling Collision\n",
2485                        dpt->unit);
2486                 crit_exit();
2487                 return;
2488         }
2489         dpt->state |= DPT_HA_TIMEOUTS_ACTIVE;
2490
2491         /* Loop through the entire submitted queue, looking for lost souls */
2492         for (ccb = TAILQ_FIRST(&dpt->submitted_ccbs);
2493              ccb != NULL;
2494              ccb = TAILQ_NEXT(ccb, links)) {
2495                 struct scsi_xfer *xs;
2496                 u_int32_t       age, max_age;
2497
2498                 xs = ccb->xs;
2499                 age = dpt_time_delta(ccb->command_started, microtime_now);
2500
2501 #define TenSec  10000000
2502
2503                 if (xs == NULL) {       /* Local, non-kernel call */
2504                         max_age = TenSec;
2505                 } else {
2506                         max_age = (((xs->timeout * (dpt->submitted_ccbs_count
2507                                                     + DPT_TIMEOUT_FACTOR))
2508                                     > TenSec)
2509                                  ? (xs->timeout * (dpt->submitted_ccbs_count
2510                                                    + DPT_TIMEOUT_FACTOR))
2511                                    : TenSec);
2512                 }
2513
2514                 /*
2515                  * If a transaction is marked lost and is TWICE as old as we
2516                  * care, then, and only then do we destroy it!
2517                  */
2518                 if (ccb->state & DPT_CCB_STATE_MARKED_LOST) {
2519                         /* Remember who is next */
2520                         if (age > (max_age * 2)) {
2521                                 dpt_Qremove_submitted(dpt, ccb);
2522                                 ccb->state &= ~DPT_CCB_STATE_MARKED_LOST;
2523                                 ccb->state |= DPT_CCB_STATE_ABORTED;
2524 #define cmd_name scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd)
2525                                 if (ccb->retries++ > DPT_RETRIES) {
2526                                         kprintf("dpt%d ERROR: Destroying stale "
2527                                                "%d (%s)\n"
2528                                                "                on "
2529                                                "c%db%dt%du%d (%d/%d)\n",
2530                                              dpt->unit, ccb->transaction_id,
2531                                                cmd_name,
2532                                                dpt->unit,
2533                                                ccb->eata_ccb.cp_channel,
2534                                                ccb->eata_ccb.cp_id,
2535                                                ccb->eata_ccb.cp_LUN, age,
2536                                                ccb->retries);
2537 #define send_ccb &ccb->eata_ccb
2538 #define ESA      EATA_SPECIFIC_ABORT
2539                                         (void) dpt_send_immediate(dpt,
2540                                                                   send_ccb,
2541                                                                   ESA,
2542                                                                   0, 0);
2543                                         dpt_Qpush_free(dpt, ccb);
2544
2545                                         /* The SCSI layer should re-try */
2546                                         xs->error |= XS_TIMEOUT;
2547                                         xs->flags |= SCSI_ITSDONE;
2548                                         scsi_done(xs);
2549                                 } else {
2550                                         kprintf("dpt%d ERROR: Stale %d (%s) on "
2551                                                "c%db%dt%du%d (%d)\n"
2552                                              "          gets another "
2553                                                "chance(%d/%d)\n",
2554                                              dpt->unit, ccb->transaction_id,
2555                                                cmd_name,
2556                                                dpt->unit,
2557                                                ccb->eata_ccb.cp_channel,
2558                                                ccb->eata_ccb.cp_id,
2559                                                ccb->eata_ccb.cp_LUN,
2560                                             age, ccb->retries, DPT_RETRIES);
2561
2562                                         dpt_Qpush_waiting(dpt, ccb);
2563                                         dpt_sched_queue(dpt);
2564                                 }
2565                         }
2566                 } else {
2567                         /*
2568                          * This is a transaction that is not to be destroyed
2569                          * (yet) But it is too old for our liking. We wait as
2570                          * long as the upper layer thinks. Not really, we
2571                          * multiply that by the number of commands in the
2572                          * submitted queue + 1.
2573                          */
2574                         if (!(ccb->state & DPT_CCB_STATE_MARKED_LOST) &&
2575                             (age != ~0) && (age > max_age)) {
2576                                 kprintf("dpt%d ERROR: Marking %d (%s) on "
2577                                        "c%db%dt%du%d \n"
2578                                        "            as late after %dusec\n",
2579                                        dpt->unit, ccb->transaction_id,
2580                                        cmd_name,
2581                                        dpt->unit, ccb->eata_ccb.cp_channel,
2582                                        ccb->eata_ccb.cp_id,
2583                                        ccb->eata_ccb.cp_LUN, age);
2584                                 ccb->state |= DPT_CCB_STATE_MARKED_LOST;
2585                         }
2586                 }
2587         }
2588
2589         dpt->state &= ~DPT_HA_TIMEOUTS_ACTIVE;
2590         crit_exit();
2591 }
2592
2593 #endif                          /* DPT_HANDLE_TIMEOUTS */
2594
2595 #endif