drivers/ieee1394/sbp2.c

   1 /*
   2  * sbp2.c - SBP-2 protocol driver for IEEE-1394
   3  *
   4  * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
   5  * jamesg@filanet.com (JSG)
   6  *
   7  * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  */
  23
  24 /*
  25  * Brief Description:
  26  *
  27  * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
  28  * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
  29  * driver. It also registers as a SCSI lower-level driver in order to accept
  30  * SCSI commands for transport using SBP-2.
  31  *
  32  * The easiest way to add/detect new SBP-2 devices is to run the shell script
  33  * rescan-scsi-bus.sh. This script may be found at:
  34  * http://www.garloff.de/kurt/linux/rescan-scsi-bus.sh
  35  *
  36  * You may access any attached SBP-2 storage devices as if they were SCSI
  37  * devices (e.g. mount /dev/sda1,  fdisk, mkfs, etc.).
  38  *
  39  * Current Issues:
  40  *
  41  *      - Error Handling: SCSI aborts and bus reset requests are handled somewhat
  42  *        but the code needs additional debugging.
  43  */
  44
  45 #include <linux/config.h>
  46 #include <linux/kernel.h>
  47 #include <linux/list.h>
  48 #include <linux/string.h>
  49 #include <linux/slab.h>
  50 #include <linux/fs.h>
  51 #include <linux/poll.h>
  52 #include <linux/module.h>
  53 #include <linux/types.h>
  54 #include <linux/delay.h>
  55 #include <linux/sched.h>
  56 #include <linux/proc_fs.h>
  57 #include <linux/blk.h>
  58 #include <linux/smp_lock.h>
  59 #include <linux/init.h>
  60 #include <linux/pci.h>
  61
  62 #include <asm/current.h>
  63 #include <asm/uaccess.h>
  64 #include <asm/io.h>
  65 #include <asm/byteorder.h>
  66 #include <asm/atomic.h>
  67 #include <asm/system.h>
  68 #include <asm/io.h>
  69 #include <asm/scatterlist.h>
  70
  71 #ifdef CONFIG_KBUILD_2_5
  72 #include <scsi.h>
  73 #include <hosts.h>
  74 #include <sd.h>
  75 #else
  76 #include "../scsi/scsi.h"
  77 #include "../scsi/hosts.h"
  78 #include "../scsi/sd.h"
  79 #endif
  80
  81 #include "ieee1394.h"
  82 #include "ieee1394_types.h"
  83 #include "ieee1394_core.h"
  84 #include "nodemgr.h"
  85 #include "hosts.h"
  86 #include "nodemgr.h"
  87 #include "highlevel.h"
  88 #include "ieee1394_transactions.h"
  89 #include "sbp2.h"
  90
  91 static char version[] __devinitdata =
  92         "$Rev: 1074 $ Ben Collins <bcollins@debian.org>";
  93
  94 /*
  95  * Module load parameter definitions
  96  */
  97
  98 /*
  99  * Change sbp2_max_speed on module load if you have a bad IEEE-1394
 100  * controller that has trouble running 2KB packets at 400mb.
 101  *
 102  * NOTE: On certain OHCI parts I have seen short packets on async transmit
 103  * (probably due to PCI latency/throughput issues with the part). You can
 104  * bump down the speed if you are running into problems.
 105  */
 106 MODULE_PARM(sbp2_max_speed,"i");
 107 MODULE_PARM_DESC(sbp2_max_speed, "Force max speed (3 = 800mb, 2 = 400mb default, 1 = 200mb, 0 = 100mb)");
 108 static int sbp2_max_speed = IEEE1394_SPEED_MAX;
 109
 110 /*
 111  * Set sbp2_serialize_io to 1 if you'd like only one scsi command sent
 112  * down to us at a time (debugging). This might be necessary for very
 113  * badly behaved sbp2 devices.
 114  */
 115 MODULE_PARM(sbp2_serialize_io,"i");
 116 MODULE_PARM_DESC(sbp2_serialize_io, "Serialize all I/O coming down from the scsi drivers (default = 1)");
 117 static int sbp2_serialize_io = 1;       /* serialize I/O - available for debugging purposes */
 118
 119 /*
 120  * Bump up sbp2_max_sectors if you'd like to support very large sized
 121  * transfers. Please note that some older sbp2 bridge chips are broken for
 122  * transfers greater or equal to 128KB.  Default is a value of 255
 123  * sectors, or just under 128KB (at 512 byte sector size). I can note that
 124  * the Oxsemi sbp2 chipsets have no problems supporting very large
 125  * transfer sizes.
 126  */
 127 MODULE_PARM(sbp2_max_sectors,"i");
 128 MODULE_PARM_DESC(sbp2_max_sectors, "Change max sectors per I/O supported (default = 255)");
 129 static int sbp2_max_sectors = SBP2_MAX_SECTORS;
 130
 131 /*
 132  * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
 133  * do an exclusive login, as it's generally unsafe to have two hosts
 134  * talking to a single sbp2 device at the same time (filesystem coherency,
 135  * etc.). If you're running an sbp2 device that supports multiple logins,
 136  * and you're either running read-only filesystems or some sort of special
 137  * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
 138  * see opengfs.sourceforge.net for more info), then set sbp2_exclusive_login
 139  * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
 140  * concurrent logins.
 141  */
 142 MODULE_PARM(sbp2_exclusive_login,"i");
 143 MODULE_PARM_DESC(sbp2_exclusive_login, "Exclusive login to sbp2 device (default = 1)");
 144 static int sbp2_exclusive_login = 1;
 145
 146 /*
 147  * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
 148  * if your sbp2 device is not properly handling the SCSI inquiry command.
 149  * This hack makes the inquiry look more like a typical MS Windows
 150  * inquiry.
 151  *
 152  * If sbp2_force_inquiry_hack=1 is required for your device to work,
 153  * please submit the logged sbp2_firmware_revision value of this device to
 154  * the linux1394-devel mailing list.
 155  */
 156 MODULE_PARM(sbp2_force_inquiry_hack,"i");
 157 MODULE_PARM_DESC(sbp2_force_inquiry_hack, "Force SCSI inquiry hack (default = 0)");
 158 static int sbp2_force_inquiry_hack = 0;
 159
 160
 161 /*
 162  * Export information about protocols/devices supported by this driver.
 163  */
 164 static struct ieee1394_device_id sbp2_id_table[] = {
 165         {
 166                 .match_flags =IEEE1394_MATCH_SPECIFIER_ID |
 167                               IEEE1394_MATCH_VERSION,
 168                 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
 169                 .version =    SBP2_SW_VERSION_ENTRY & 0xffffff
 170         },
 171         { }
 172 };
 173
 174 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
 175
 176 /*
 177  * Debug levels, configured via kernel config, or enable here.
 178  */
 179
 180 /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
 181 /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
 182 /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
 183 /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
 184 /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
 185
 186 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
 187 #define SBP2_ORB_DEBUG(fmt, args...)    HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
 188 static u32 global_outstanding_command_orbs = 0;
 189 #define outstanding_orb_incr global_outstanding_command_orbs++
 190 #define outstanding_orb_decr global_outstanding_command_orbs--
 191 #else
 192 #define SBP2_ORB_DEBUG(fmt, args...)
 193 #define outstanding_orb_incr
 194 #define outstanding_orb_decr
 195 #endif
 196
 197 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
 198 #define SBP2_DMA_ALLOC(fmt, args...) \
 199         HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
 200                  ++global_outstanding_dmas, ## args)
 201 #define SBP2_DMA_FREE(fmt, args...) \
 202         HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
 203                  --global_outstanding_dmas, ## args)
 204 static u32 global_outstanding_dmas = 0;
 205 #else
 206 #define SBP2_DMA_ALLOC(fmt, args...)
 207 #define SBP2_DMA_FREE(fmt, args...)
 208 #endif
 209
 210 #if CONFIG_IEEE1394_SBP2_DEBUG >= 2
 211 #define SBP2_DEBUG(fmt, args...)        HPSB_ERR("sbp2: "fmt, ## args)
 212 #define SBP2_INFO(fmt, args...)         HPSB_ERR("sbp2: "fmt, ## args)
 213 #define SBP2_NOTICE(fmt, args...)       HPSB_ERR("sbp2: "fmt, ## args)
 214 #define SBP2_WARN(fmt, args...)         HPSB_ERR("sbp2: "fmt, ## args)
 215 #elif CONFIG_IEEE1394_SBP2_DEBUG == 1
 216 #define SBP2_DEBUG(fmt, args...)        HPSB_DEBUG("sbp2: "fmt, ## args)
 217 #define SBP2_INFO(fmt, args...)         HPSB_INFO("sbp2: "fmt, ## args)
 218 #define SBP2_NOTICE(fmt, args...)       HPSB_NOTICE("sbp2: "fmt, ## args)
 219 #define SBP2_WARN(fmt, args...)         HPSB_WARN("sbp2: "fmt, ## args)
 220 #else
 221 #define SBP2_DEBUG(fmt, args...)
 222 #define SBP2_INFO(fmt, args...)         HPSB_INFO("sbp2: "fmt, ## args)
 223 #define SBP2_NOTICE(fmt, args...)       HPSB_NOTICE("sbp2: "fmt, ## args)
 224 #define SBP2_WARN(fmt, args...)         HPSB_WARN("sbp2: "fmt, ## args)
 225 #endif
 226
 227 #define SBP2_ERR(fmt, args...)          HPSB_ERR("sbp2: "fmt, ## args)
 228
 229
 230 /* If you get the linux-2.4 scsi_{add,remove}_single_device patch, you can
 231  * enable this define to make use of it. This provides better hotplug
 232  * support. The mentioned patch is not part of the kernel proper though,
 233  * because it is considered somewhat of a hack. */
 234 //#define SBP2_USE_SCSI_ADDREM_HACK
 235
 236
 237 /*
 238  * Globals
 239  */
 240
 241 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
 242                                            u32 status);
 243
 244 static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
 245                                       u32 scsi_status, Scsi_Cmnd *SCpnt,
 246                                       void (*done)(Scsi_Cmnd *));
 247
 248 static Scsi_Host_Template scsi_driver_template;
 249
 250 const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
 251
 252 static struct hpsb_highlevel sbp2_highlevel = {
 253         .name =         SBP2_DEVICE_NAME,
 254         .remove_host =  sbp2_remove_host,
 255 };
 256
 257 static struct hpsb_address_ops sbp2_ops = {
 258         .write = sbp2_handle_status_write
 259 };
 260
 261 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
 262 static struct hpsb_address_ops sbp2_physdma_ops = {
 263         .read = sbp2_handle_physdma_read,
 264         .write = sbp2_handle_physdma_write,
 265 };
 266 #endif
 267
 268 static struct hpsb_protocol_driver sbp2_driver = {
 269         .name =         "SBP2 Driver",
 270         .id_table =     sbp2_id_table,
 271         .probe =        sbp2_probe,
 272         .disconnect =   sbp2_disconnect,
 273         .update =       sbp2_update
 274 };
 275
 276 /* List of device firmware's that require a forced 36 byte inquiry.  */
 277 static u32 sbp2_broken_inquiry_list[] = {
 278         0x00002800,     /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */
 279                         /* DViCO Momobay CX-1 */
 280         0x00000200      /* Andreas Plesch <plesch@fas.harvard.edu> */
 281                         /* QPS Fire DVDBurner */
 282 };
 283
 284 #define NUM_BROKEN_INQUIRY_DEVS \
 285         (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list))
 286
 287 /**************************************
 288  * General utility functions
 289  **************************************/
 290
 291
 292 #ifndef __BIG_ENDIAN
 293 /*
 294  * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
 295  */
 296 static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
 297 {
 298         u32 *temp = buffer;
 299
 300         for (length = (length >> 2); length--; )
 301                 temp[length] = be32_to_cpu(temp[length]);
 302
 303         return;
 304 }
 305
 306 /*
 307  * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
 308  */
 309 static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
 310 {
 311         u32 *temp = buffer;
 312
 313         for (length = (length >> 2); length--; )
 314                 temp[length] = cpu_to_be32(temp[length]);
 315
 316         return;
 317 }
 318 #else /* BIG_ENDIAN */
 319 /* Why waste the cpu cycles? */
 320 #define sbp2util_be32_to_cpu_buffer(x,y)
 321 #define sbp2util_cpu_to_be32_buffer(x,y)
 322 #endif
 323
 324 #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
 325 /*
 326  * Debug packet dump routine. Length is in bytes.
 327  */
 328 static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, u32 dump_phys_addr)
 329 {
 330         int i;
 331         unsigned char *dump = buffer;
 332
 333         if (!dump || !length || !dump_name)
 334                 return;
 335
 336         if (dump_phys_addr)
 337                 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
 338         else
 339                 printk("[%s]", dump_name);
 340         for (i = 0; i < length; i++) {
 341                 if (i > 0x3f) {
 342                         printk("\n   ...");
 343                         break;
 344                 }
 345                 if ((i & 0x3) == 0)
 346                         printk("  ");
 347                 if ((i & 0xf) == 0)
 348                         printk("\n   ");
 349                 printk("%02x ", (int) dump[i]);
 350         }
 351         printk("\n");
 352
 353         return;
 354 }
 355 #else
 356 #define sbp2util_packet_dump(w,x,y,z)
 357 #endif
 358
 359 /*
 360  * Goofy routine that basically does a down_timeout function.
 361  */
 362 static int sbp2util_down_timeout(atomic_t *done, int timeout)
 363 {
 364         int i;
 365
 366         for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
 367                 set_current_state(TASK_INTERRUPTIBLE);
 368                 if (schedule_timeout(HZ/10))    /* 100ms */
 369                         return(1);
 370         }
 371         return ((i > 0) ? 0:1);
 372 }
 373
 374 /* Free's an allocated packet */
 375 static void sbp2_free_packet(struct hpsb_packet *packet)
 376 {
 377         hpsb_free_tlabel(packet);
 378         free_hpsb_packet(packet);
 379 }
 380
 381 /*
 382  * This function is called to retrieve a block write packet from our
 383  * packet pool. This function is used in place of calling
 384  * alloc_hpsb_packet (which costs us three kmallocs). Instead we just pull
 385  * out a free request packet and re-initialize values in it. I'm sure this
 386  * can still stand some more optimization.
 387  */
 388 static struct hpsb_packet *
 389 sbp2util_allocate_write_packet(struct sbp2scsi_host_info *hi,
 390                                struct node_entry *ne, u64 addr,
 391                                size_t data_size,
 392                                quadlet_t *data, int complete)
 393 {
 394         struct hpsb_packet *packet;
 395
 396         packet = hpsb_make_writepacket(hi->host, ne->nodeid,
 397                                        addr, data, data_size);
 398
 399         if (!packet)
 400                 return NULL;
 401
 402         if (complete)
 403                 hpsb_set_packet_complete_task(packet,
 404                         (void (*)(void*))sbp2_free_packet, packet);
 405
 406         hpsb_node_fill_packet(ne, packet);
 407
 408         return packet;
 409 }
 410
 411
 412 /*
 413  * This function is called to create a pool of command orbs used for
 414  * command processing. It is called when a new sbp2 device is detected.
 415  */
 416 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
 417 {
 418         struct sbp2scsi_host_info *hi = scsi_id->hi;
 419         int i;
 420         unsigned long flags, orbs;
 421         struct sbp2_command_info *command;
 422
 423         orbs = sbp2_serialize_io ? 2 : SBP2_MAX_COMMAND_ORBS;
 424
 425         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 426         for (i = 0; i < orbs; i++) {
 427                 command = (struct sbp2_command_info *)
 428                     kmalloc(sizeof(struct sbp2_command_info), GFP_ATOMIC);
 429                 if (!command) {
 430                         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 431                         return(-ENOMEM);
 432                 }
 433                 memset(command, '\0', sizeof(struct sbp2_command_info));
 434                 command->command_orb_dma =
 435                         pci_map_single (hi->host->pdev, &command->command_orb,
 436                                         sizeof(struct sbp2_command_orb),
 437                                         PCI_DMA_BIDIRECTIONAL);
 438                 SBP2_DMA_ALLOC("single command orb DMA");
 439                 command->sge_dma =
 440                         pci_map_single (hi->host->pdev, &command->scatter_gather_element,
 441                                         sizeof(command->scatter_gather_element),
 442                                         PCI_DMA_BIDIRECTIONAL);
 443                 SBP2_DMA_ALLOC("scatter_gather_element");
 444                 INIT_LIST_HEAD(&command->list);
 445                 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
 446         }
 447         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 448         return 0;
 449 }
 450
 451 /*
 452  * This function is called to delete a pool of command orbs.
 453  */
 454 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
 455 {
 456         struct hpsb_host *host = scsi_id->hi->host;
 457         struct list_head *lh, *next;
 458         struct sbp2_command_info *command;
 459         unsigned long flags;
 460
 461         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 462         if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
 463                 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
 464                         command = list_entry(lh, struct sbp2_command_info, list);
 465
 466                         /* Release our generic DMA's */
 467                         pci_unmap_single(host->pdev, command->command_orb_dma,
 468                                          sizeof(struct sbp2_command_orb),
 469                                          PCI_DMA_BIDIRECTIONAL);
 470                         SBP2_DMA_FREE("single command orb DMA");
 471                         pci_unmap_single(host->pdev, command->sge_dma,
 472                                          sizeof(command->scatter_gather_element),
 473                                          PCI_DMA_BIDIRECTIONAL);
 474                         SBP2_DMA_FREE("scatter_gather_element");
 475
 476                         kfree(command);
 477                 }
 478         }
 479         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 480         return;
 481 }
 482
 483 /*
 484  * This function finds the sbp2_command for a given outstanding command
 485  * orb.Only looks at the inuse list.
 486  */
 487 static struct sbp2_command_info *sbp2util_find_command_for_orb(
 488                 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
 489 {
 490         struct list_head *lh;
 491         struct sbp2_command_info *command;
 492         unsigned long flags;
 493
 494         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 495         if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
 496                 list_for_each(lh, &scsi_id->sbp2_command_orb_inuse) {
 497                         command = list_entry(lh, struct sbp2_command_info, list);
 498                         if (command->command_orb_dma == orb) {
 499                                 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 500                                 return (command);
 501                         }
 502                 }
 503         }
 504         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 505
 506         SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
 507
 508         return(NULL);
 509 }
 510
 511 /*
 512  * This function finds the sbp2_command for a given outstanding SCpnt.
 513  * Only looks at the inuse list.
 514  */
 515 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt)
 516 {
 517         struct list_head *lh;
 518         struct sbp2_command_info *command;
 519         unsigned long flags;
 520
 521         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 522         if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
 523                 list_for_each(lh, &scsi_id->sbp2_command_orb_inuse) {
 524                         command = list_entry(lh, struct sbp2_command_info, list);
 525                         if (command->Current_SCpnt == SCpnt) {
 526                                 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 527                                 return (command);
 528                         }
 529                 }
 530         }
 531         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 532         return(NULL);
 533 }
 534
 535 /*
 536  * This function allocates a command orb used to send a scsi command.
 537  */
 538 static struct sbp2_command_info *sbp2util_allocate_command_orb(
 539                 struct scsi_id_instance_data *scsi_id,
 540                 Scsi_Cmnd *Current_SCpnt,
 541                 void (*Current_done)(Scsi_Cmnd *))
 542 {
 543         struct list_head *lh;
 544         struct sbp2_command_info *command = NULL;
 545         unsigned long flags;
 546
 547         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 548         if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
 549                 lh = scsi_id->sbp2_command_orb_completed.next;
 550                 list_del(lh);
 551                 command = list_entry(lh, struct sbp2_command_info, list);
 552                 command->Current_done = Current_done;
 553                 command->Current_SCpnt = Current_SCpnt;
 554                 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
 555         } else {
 556                 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
 557         }
 558         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 559         return (command);
 560 }
 561
 562 /* Free our DMA's */
 563 static void sbp2util_free_command_dma(struct sbp2_command_info *command)
 564 {
 565         struct hpsb_host *host;
 566
 567         host = hpsb_get_host_bykey(&sbp2_highlevel,
 568                 (unsigned long)command->Current_SCpnt->device->host->hostt);
 569         if (!host) {
 570                 printk(KERN_ERR "%s: host == NULL\n", __FUNCTION__);
 571                 return;
 572         }
 573
 574         if (command->cmd_dma) {
 575                 if (command->dma_type == CMD_DMA_SINGLE) {
 576                         pci_unmap_single(host->pdev, command->cmd_dma,
 577                                          command->dma_size, command->dma_dir);
 578                         SBP2_DMA_FREE("single bulk");
 579                 } else if (command->dma_type == CMD_DMA_PAGE) {
 580                         pci_unmap_page(host->pdev, command->cmd_dma,
 581                                        command->dma_size, command->dma_dir);
 582                         SBP2_DMA_FREE("single page");
 583                 } /* XXX: Check for CMD_DMA_NONE bug */
 584                 command->dma_type = CMD_DMA_NONE;
 585                 command->cmd_dma = 0;
 586         }
 587
 588         if (command->sge_buffer) {
 589                 pci_unmap_sg(host->pdev, command->sge_buffer,
 590                              command->dma_size, command->dma_dir);
 591                 SBP2_DMA_FREE("scatter list");
 592                 command->sge_buffer = NULL;
 593         }
 594 }
 595
 596 /*
 597  * This function moves a command to the completed orb list.
 598  */
 599 static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command)
 600 {
 601         unsigned long flags;
 602
 603         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 604         list_del(&command->list);
 605         sbp2util_free_command_dma(command);
 606         list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
 607         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 608 }
 609
 610 \f
 611
 612 /*********************************************
 613  * IEEE-1394 core driver stack related section
 614  *********************************************/
 615
 616 /*
 617  * This function is called at SCSI init in order to register our driver
 618  * with the IEEE-1394 stack.
 619  */
 620 static int sbp2scsi_detect(Scsi_Host_Template *tpnt)
 621 {
 622         struct Scsi_Host *scsi_host;
 623         struct hpsb_host *host = hpsb_get_host_bykey(&sbp2_highlevel, (unsigned long)tpnt);
 624
 625         SBP2_DEBUG("sbp2scsi_detect");
 626
 627         /* Register our host with the SCSI stack. */
 628         if (!(scsi_host = scsi_register(tpnt, 0)))
 629                 return 0;
 630
 631         scsi_set_pci_device(scsi_host, host->pdev);
 632
 633         tpnt->present = 1;
 634
 635         return tpnt->present;
 636 }
 637
 638 static int sbp2_probe(struct unit_directory *ud)
 639 {
 640         struct sbp2scsi_host_info *hi;
 641
 642         SBP2_DEBUG(__FUNCTION__);
 643
 644         /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
 645          * instead. */
 646         if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
 647                 return -1;
 648
 649         /* This will only add it if it doesn't exist */
 650         hi = sbp2_add_host(ud->ne->host);
 651
 652         if (!hi)
 653                 return -1;
 654
 655         return sbp2_start_ud(hi, ud);
 656 }
 657
 658 static void sbp2_disconnect(struct unit_directory *ud)
 659 {
 660         struct scsi_id_group *scsi_group = ud->driver_data;
 661         struct list_head *lh, *next;
 662         struct scsi_id_instance_data *scsi_id;
 663
 664         SBP2_DEBUG("sbp2_disconnect");
 665
 666         list_for_each_safe (lh, next, &scsi_group->scsi_id_list) {
 667                 scsi_id = list_entry(lh, struct scsi_id_instance_data, list);
 668                 if (scsi_id) {
 669                         sbp2_logout_device(scsi_id);
 670                         sbp2_remove_device(scsi_id);
 671                 }
 672         }
 673
 674         kfree(scsi_group);
 675 }
 676
 677 static void sbp2_update(struct unit_directory *ud)
 678 {
 679         struct sbp2scsi_host_info *hi;
 680         struct scsi_id_group *scsi_group = ud->driver_data;
 681         struct list_head *lh, *next;
 682         struct scsi_id_instance_data *scsi_id;
 683         unsigned long flags;
 684
 685         SBP2_DEBUG("sbp2_update");
 686         hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
 687
 688         list_for_each_safe (lh, next, &scsi_group->scsi_id_list) {
 689                 scsi_id = list_entry(lh, struct scsi_id_instance_data, list);
 690
 691                 if (sbp2_reconnect_device(scsi_id)) {
 692                         /*
 693                          * Ok, reconnect has failed. Perhaps we didn't
 694                          * reconnect fast enough. Try doing a regular login.
 695                          */
 696                         if (sbp2_login_device(scsi_id)) {
 697                                 /* Login failed too, just remove the device. */
 698                                 SBP2_ERR("sbp2_reconnect_device failed!");
 699                                 sbp2_remove_device(scsi_id);
 700                                 continue;
 701                         }
 702                 }
 703
 704                 /* Set max retries to something large on the device. */
 705                 sbp2_set_busy_timeout(scsi_id);
 706
 707                 /* Do a SBP-2 fetch agent reset. */
 708                 sbp2_agent_reset(scsi_id, 0);
 709
 710                 /* Get the max speed and packet size that we can use. */
 711                 sbp2_max_speed_and_size(scsi_id);
 712
 713                 /* Complete any pending commands with busy (so they get
 714                  * retried) and remove them from our queue
 715                  */
 716                 spin_lock_irqsave(&hi->sbp2_command_lock, flags);
 717                 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
 718                 spin_unlock_irqrestore(&hi->sbp2_command_lock, flags);
 719         }
 720
 721         if (list_empty(&scsi_group->scsi_id_list)) {
 722                 hpsb_release_unit_directory(ud);
 723                 kfree(scsi_group);
 724         }
 725 }
 726
 727 /*
 728  * We go ahead and allocate some memory for our host info structure, and
 729  * init some structures.
 730  */
 731 static struct sbp2scsi_host_info *sbp2_add_host(struct hpsb_host *host)
 732 {
 733         struct sbp2scsi_host_info *hi;
 734
 735         SBP2_DEBUG("sbp2_add_host");
 736
 737         /* Check for existing hostinfo */
 738         hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
 739         if (hi)
 740                 return hi;
 741
 742         /* Allocate some memory for our host info structure */
 743         hi = hpsb_create_hostinfo(&sbp2_highlevel, host, sizeof(*hi));
 744
 745         if (hi == NULL) {
 746                 SBP2_ERR("out of memory in sbp2_add_host");
 747                 return NULL;
 748         }
 749
 750         /* Initialize some host stuff */
 751         hi->host = host;
 752         hi->sbp2_command_lock = SPIN_LOCK_UNLOCKED;
 753
 754         memcpy(&hi->sht, &scsi_driver_template, sizeof hi->sht);
 755         sprintf(hi->proc_name, "%s_%d", SBP2_DEVICE_NAME, host->id);
 756         hi->sht.proc_name = hi->proc_name;
 757         hpsb_set_hostinfo_key(&sbp2_highlevel, host, (unsigned long)&hi->sht);
 758
 759         if (SCSI_REGISTER_HOST(&hi->sht)) {
 760                 SBP2_ERR("Failed to register scsi template for ieee1394 host");
 761                 hpsb_destroy_hostinfo(&sbp2_highlevel, host);
 762                 return NULL;
 763         }
 764
 765         for (hi->scsi_host = scsi_hostlist; hi->scsi_host; hi->scsi_host = hi->scsi_host->next)
 766                 if (hi->scsi_host->hostt == &hi->sht)
 767                         break;
 768
 769         if (!hi->scsi_host) {
 770                 SBP2_ERR("Failed to register scsi host for ieee1394 host");
 771                 SCSI_UNREGISTER_HOST(&hi->sht);
 772                 hpsb_destroy_hostinfo(&sbp2_highlevel, host);
 773                 return NULL;
 774         }
 775
 776         hi->scsi_host->max_id = SBP2SCSI_MAX_SCSI_IDS;
 777
 778         return hi;
 779 }
 780
 781
 782 /*
 783  * This function is called when a host is removed.
 784  */
 785 static void sbp2_remove_host(struct hpsb_host *host)
 786 {
 787         struct sbp2scsi_host_info *hi;
 788
 789         SBP2_DEBUG("sbp2_remove_host");
 790
 791         hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
 792
 793         if (hi)
 794                 SCSI_UNREGISTER_HOST(&hi->sht);
 795 }
 796
 797 static int sbp2_start_ud(struct sbp2scsi_host_info *hi, struct unit_directory *ud)
 798 {
 799         struct scsi_id_instance_data *scsi_id;
 800         struct scsi_id_group *scsi_group;
 801         struct list_head *lh, *next;
 802
 803         SBP2_DEBUG("sbp2_start_ud");
 804
 805         scsi_group = kmalloc(sizeof(*scsi_group), GFP_KERNEL);
 806         if (!scsi_group) {
 807                 SBP2_ERR ("Could not allocate memory for scsi_group");
 808                 return -ENOMEM;
 809         }
 810
 811         INIT_LIST_HEAD(&scsi_group->scsi_id_list);
 812         ud->driver_data = scsi_group;
 813         sbp2_parse_unit_directory(scsi_group, ud);
 814
 815         list_for_each_safe (lh, next, &scsi_group->scsi_id_list) {
 816                 scsi_id = list_entry(lh, struct scsi_id_instance_data, list);
 817
 818                 scsi_id->ne = ud->ne;
 819                 scsi_id->hi = hi;
 820                 scsi_id->speed_code = IEEE1394_SPEED_100;
 821                 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
 822                 atomic_set(&scsi_id->sbp2_login_complete, 0);
 823                 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
 824                 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
 825                 scsi_id->sbp2_command_orb_lock = SPIN_LOCK_UNLOCKED;
 826
 827                 sbp2_start_device(scsi_id);
 828         }
 829
 830         /* Check to see if any of our devices survived the ordeal */
 831         if (list_empty(&scsi_group->scsi_id_list)) {
 832                 kfree(scsi_group);
 833                 return -ENODEV;
 834         }
 835
 836         return 0;
 837 }
 838
 839
 840 /*
 841  * This function is where we first pull the node unique ids, and then
 842  * allocate memory and register a SBP-2 device.
 843  */
 844 static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
 845 {
 846         struct sbp2scsi_host_info *hi = scsi_id->hi;
 847         int i;
 848
 849         SBP2_DEBUG("sbp2_start_device");
 850
 851         /* Login FIFO DMA */
 852         scsi_id->login_response =
 853                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_response),
 854                                      &scsi_id->login_response_dma);
 855         if (!scsi_id->login_response)
 856                 goto alloc_fail;
 857         SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
 858
 859         /* Query logins ORB DMA */
 860         scsi_id->query_logins_orb =
 861                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_orb),
 862                                      &scsi_id->query_logins_orb_dma);
 863         if (!scsi_id->query_logins_orb)
 864                 goto alloc_fail;
 865         SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
 866
 867         /* Query logins response DMA */
 868         scsi_id->query_logins_response =
 869                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_response),
 870                                      &scsi_id->query_logins_response_dma);
 871         if (!scsi_id->query_logins_response)
 872                 goto alloc_fail;
 873         SBP2_DMA_ALLOC("consistent DMA region for query logins response");
 874
 875         /* Reconnect ORB DMA */
 876         scsi_id->reconnect_orb =
 877                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_reconnect_orb),
 878                                      &scsi_id->reconnect_orb_dma);
 879         if (!scsi_id->reconnect_orb)
 880                 goto alloc_fail;
 881         SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
 882
 883         /* Logout ORB DMA */
 884         scsi_id->logout_orb =
 885                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_logout_orb),
 886                                      &scsi_id->logout_orb_dma);
 887         if (!scsi_id->logout_orb)
 888                 goto alloc_fail;
 889         SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
 890
 891         /* Login ORB DMA */
 892         scsi_id->login_orb =
 893                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb),
 894                                      &scsi_id->login_orb_dma);
 895         if (!scsi_id->login_orb) {
 896 alloc_fail:
 897                 if (scsi_id->query_logins_response) {
 898                         pci_free_consistent(hi->host->pdev,
 899                                             sizeof(struct sbp2_query_logins_response),
 900                                             scsi_id->query_logins_response,
 901                                             scsi_id->query_logins_response_dma);
 902                         SBP2_DMA_FREE("query logins response DMA");
 903                 }
 904
 905                 if (scsi_id->query_logins_orb) {
 906                         pci_free_consistent(hi->host->pdev,
 907                                             sizeof(struct sbp2_query_logins_orb),
 908                                             scsi_id->query_logins_orb,
 909                                             scsi_id->query_logins_orb_dma);
 910                         SBP2_DMA_FREE("query logins ORB DMA");
 911                 }
 912
 913                 if (scsi_id->logout_orb) {
 914                         pci_free_consistent(hi->host->pdev,
 915                                         sizeof(struct sbp2_logout_orb),
 916                                         scsi_id->logout_orb,
 917                                         scsi_id->logout_orb_dma);
 918                         SBP2_DMA_FREE("logout ORB DMA");
 919                 }
 920
 921                 if (scsi_id->reconnect_orb) {
 922                         pci_free_consistent(hi->host->pdev,
 923                                         sizeof(struct sbp2_reconnect_orb),
 924                                         scsi_id->reconnect_orb,
 925                                         scsi_id->reconnect_orb_dma);
 926                         SBP2_DMA_FREE("reconnect ORB DMA");
 927                 }
 928
 929                 if (scsi_id->login_response) {
 930                         pci_free_consistent(hi->host->pdev,
 931                                         sizeof(struct sbp2_login_response),
 932                                         scsi_id->login_response,
 933                                         scsi_id->login_response_dma);
 934                         SBP2_DMA_FREE("login FIFO DMA");
 935                 }
 936
 937                 kfree(scsi_id);
 938
 939                 list_del(&scsi_id->list);
 940
 941                 SBP2_ERR ("Could not allocate memory for scsi_id");
 942
 943                 return -ENOMEM;
 944         }
 945         SBP2_DMA_ALLOC("consistent DMA region for login ORB");
 946
 947         /*
 948          * Find an empty spot to stick our scsi id instance data.
 949          */
 950         for (i = 0; i < hi->scsi_host->max_id; i++) {
 951                 if (!hi->scsi_id[i]) {
 952                         hi->scsi_id[i] = scsi_id;
 953                         scsi_id->id = i;
 954                         SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", (unsigned int) i);
 955                         break;
 956                 }
 957         }
 958
 959         /*
 960          * Create our command orb pool
 961          */
 962         if (sbp2util_create_command_orb_pool(scsi_id)) {
 963                 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
 964                 sbp2_remove_device(scsi_id);
 965                 return -ENOMEM;
 966         }
 967
 968         /*
 969          * Make sure we are not out of space
 970          */
 971         if (i == hi->scsi_host->max_id) {
 972                 SBP2_ERR("No slots left for SBP-2 device");
 973                 sbp2_remove_device(scsi_id);
 974                 return -EBUSY;
 975         }
 976
 977         /* Schedule a timeout here. The reason is that we may be so close
 978          * to a bus reset, that the device is not available for logins.
 979          * This can happen when the bus reset is caused by the host
 980          * connected to the sbp2 device being removed. That host would
 981          * have a certain amount of time to relogin before the sbp2 device
 982          * allows someone else to login instead. One second makes sense. */
 983         set_current_state(TASK_INTERRUPTIBLE);
 984         schedule_timeout(HZ);
 985
 986         /*
 987          * Login to the sbp-2 device
 988          */
 989         if (sbp2_login_device(scsi_id)) {
 990                 /* Login failed, just remove the device. */
 991                 sbp2_remove_device(scsi_id);
 992                 return -EBUSY;
 993         }
 994
 995         /*
 996          * Set max retries to something large on the device
 997          */
 998         sbp2_set_busy_timeout(scsi_id);
 999
1000         /*
1001          * Do a SBP-2 fetch agent reset
1002          */
1003         sbp2_agent_reset(scsi_id, 1);
1004
1005         /*
1006          * Get the max speed and packet size that we can use
1007          */
1008         sbp2_max_speed_and_size(scsi_id);
1009
1010 #ifdef SBP2_USE_SCSI_ADDREM_HACK
1011         /* Try to hook ourselves into the SCSI subsystem */
1012         if (scsi_add_single_device(hi->scsi_host, 0, scsi_id->id, 0))
1013                 SBP2_INFO("Unable to connect SBP-2 device into the SCSI subsystem");
1014 #endif
1015
1016         return 0;
1017 }
1018
1019 /*
1020  * This function removes an sbp2 device from the sbp2scsi_host_info struct.
1021  */
1022 static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
1023 {
1024         struct sbp2scsi_host_info *hi = scsi_id->hi;
1025
1026         SBP2_DEBUG("sbp2_remove_device");
1027
1028         /* Complete any pending commands with selection timeout */
1029         sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
1030
1031         /* Clean up any other structures */
1032         sbp2util_remove_command_orb_pool(scsi_id);
1033
1034         hi->scsi_id[scsi_id->id] = NULL;
1035
1036         if (scsi_id->login_response) {
1037                 pci_free_consistent(hi->host->pdev,
1038                                     sizeof(struct sbp2_login_response),
1039                                     scsi_id->login_response,
1040                                     scsi_id->login_response_dma);
1041                 SBP2_DMA_FREE("single login FIFO");
1042         }
1043
1044         if (scsi_id->login_orb) {
1045                 pci_free_consistent(hi->host->pdev,
1046                                     sizeof(struct sbp2_login_orb),
1047                                     scsi_id->login_orb,
1048                                     scsi_id->login_orb_dma);
1049                 SBP2_DMA_FREE("single login ORB");
1050         }
1051
1052         if (scsi_id->reconnect_orb) {
1053                 pci_free_consistent(hi->host->pdev,
1054                                     sizeof(struct sbp2_reconnect_orb),
1055                                     scsi_id->reconnect_orb,
1056                                     scsi_id->reconnect_orb_dma);
1057                 SBP2_DMA_FREE("single reconnect orb");
1058         }
1059
1060         if (scsi_id->logout_orb) {
1061                 pci_free_consistent(hi->host->pdev,
1062                                     sizeof(struct sbp2_logout_orb),
1063                                     scsi_id->logout_orb,
1064                                     scsi_id->logout_orb_dma);
1065                 SBP2_DMA_FREE("single logout orb");
1066         }
1067
1068         if (scsi_id->query_logins_orb) {
1069                 pci_free_consistent(hi->host->pdev,
1070                                     sizeof(struct sbp2_query_logins_orb),
1071                                     scsi_id->query_logins_orb,
1072                                     scsi_id->query_logins_orb_dma);
1073                 SBP2_DMA_FREE("single query logins orb");
1074         }
1075
1076         if (scsi_id->query_logins_response) {
1077                 pci_free_consistent(hi->host->pdev,
1078                                     sizeof(struct sbp2_query_logins_response),
1079                                     scsi_id->query_logins_response,
1080                                     scsi_id->query_logins_response_dma);
1081                 SBP2_DMA_FREE("single query logins data");
1082         }
1083
1084         SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->id);
1085
1086         list_del(&scsi_id->list);
1087
1088         kfree(scsi_id);
1089 }
1090
1091 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1092 /*
1093  * This function deals with physical dma write requests (for adapters that do not support
1094  * physical dma in hardware). Mostly just here for debugging...
1095  */
1096 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data,
1097                                      u64 addr, size_t length, u16 flags)
1098 {
1099
1100         /*
1101          * Manually put the data in the right place.
1102          */
1103         memcpy(bus_to_virt((u32)addr), data, length);
1104         sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", (u32)addr);
1105         return(RCODE_COMPLETE);
1106 }
1107
1108 /*
1109  * This function deals with physical dma read requests (for adapters that do not support
1110  * physical dma in hardware). Mostly just here for debugging...
1111  */
1112 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data,
1113                                     u64 addr, size_t length, u16 flags)
1114 {
1115
1116         /*
1117          * Grab data from memory and send a read response.
1118          */
1119         memcpy(data, bus_to_virt((u32)addr), length);
1120         sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", (u32)addr);
1121         return(RCODE_COMPLETE);
1122 }
1123 #endif
1124
1125
1126 /**************************************
1127  * SBP-2 protocol related section
1128  **************************************/
1129
1130 /*
1131  * This function determines if we should convert scsi commands for a particular sbp2 device type
1132  */
1133 static __inline__ int sbp2_command_conversion_device_type(u8 device_type)
1134 {
1135         return (((device_type == TYPE_DISK) ||
1136                  (device_type == TYPE_SDAD) ||
1137                  (device_type == TYPE_ROM)) ? 1:0);
1138 }
1139
1140 /*
1141  * This function queries the device for the maximum concurrent logins it
1142  * supports.
1143  */
1144 static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1145 {
1146         struct sbp2scsi_host_info *hi = scsi_id->hi;
1147         quadlet_t data[2];
1148         int max_logins;
1149         int active_logins;
1150
1151         SBP2_DEBUG("sbp2_query_logins");
1152
1153         scsi_id->query_logins_orb->reserved1 = 0x0;
1154         scsi_id->query_logins_orb->reserved2 = 0x0;
1155
1156         scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1157         scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1158         SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1159
1160         scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(QUERY_LOGINS_REQUEST);
1161         scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1162         if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1163                 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1164                 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1165                            ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1166         }
1167         SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
1168
1169         scsi_id->query_logins_orb->reserved_resp_length =
1170                 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
1171         SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
1172
1173         scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1174                                                     SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->id);
1175         scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1176                                                      SBP2_STATUS_FIFO_ADDRESS_HI);
1177         SBP2_DEBUG("sbp2_query_logins: status FIFO initialized");
1178
1179         sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1180
1181         SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1182
1183         sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1184                              "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1185
1186         memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1187         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1188
1189         SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1190
1191         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1192         data[1] = scsi_id->query_logins_orb_dma;
1193         sbp2util_cpu_to_be32_buffer(data, 8);
1194
1195         atomic_set(&scsi_id->sbp2_login_complete, 0);
1196
1197         SBP2_DEBUG("sbp2_query_logins: prepared to write");
1198         hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1199         SBP2_DEBUG("sbp2_query_logins: written");
1200
1201         if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1202                 SBP2_ERR("Error querying logins to SBP-2 device - timed out");
1203                 return(-EIO);
1204         }
1205
1206         if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1207                 SBP2_ERR("Error querying logins to SBP-2 device - timed out");
1208                 return(-EIO);
1209         }
1210
1211         if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1212             STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1213             STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1214
1215                 SBP2_ERR("Error querying logins to SBP-2 device - timed out");
1216                 return(-EIO);
1217         }
1218
1219         sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1220
1221         SBP2_DEBUG("length_max_logins = %x",
1222                    (unsigned int)scsi_id->query_logins_response->length_max_logins);
1223
1224         SBP2_INFO("Query logins to SBP-2 device successful");
1225
1226         max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1227         SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
1228
1229         active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1230         SBP2_INFO("Number of active logins: %d", active_logins);
1231
1232         if (active_logins >= max_logins) {
1233                 return(-EIO);
1234         }
1235
1236         return 0;
1237 }
1238
1239 /*
1240  * This function is called in order to login to a particular SBP-2 device,
1241  * after a bus reset.
1242  */
1243 static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1244 {
1245         struct sbp2scsi_host_info *hi = scsi_id->hi;
1246         quadlet_t data[2];
1247
1248         SBP2_DEBUG("sbp2_login_device");
1249
1250         if (!scsi_id->login_orb) {
1251                 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
1252                 return(-EIO);
1253         }
1254
1255         if (!sbp2_exclusive_login) {
1256                 if (sbp2_query_logins(scsi_id)) {
1257                         SBP2_ERR("Device does not support any more concurrent logins");
1258                         return(-EIO);
1259                 }
1260         }
1261
1262         /* Set-up login ORB, assume no password */
1263         scsi_id->login_orb->password_hi = 0;
1264         scsi_id->login_orb->password_lo = 0;
1265         SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1266
1267         scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1268         scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1269         SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1270
1271         scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(LOGIN_REQUEST);
1272         scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0);   /* One second reconnect time */
1273         scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);        /* Exclusive access to device */
1274         scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1);      /* Notify us of login complete */
1275         /* Set the lun if we were able to pull it from the device's unit directory */
1276         if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1277                 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1278                 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1279                            ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1280         }
1281         SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1282
1283         scsi_id->login_orb->passwd_resp_lengths =
1284                 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1285         SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1286
1287         scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1288                                              SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->id);
1289         scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1290                                               SBP2_STATUS_FIFO_ADDRESS_HI);
1291         SBP2_DEBUG("sbp2_login_device: status FIFO initialized");
1292
1293         /*
1294          * Byte swap ORB if necessary
1295          */
1296         sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1297
1298         SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1299
1300         sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1301                              "sbp2 login orb", scsi_id->login_orb_dma);
1302
1303         /*
1304          * Initialize login response and status fifo
1305          */
1306         memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1307         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1308
1309         SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1310
1311         /*
1312          * Ok, let's write to the target's management agent register
1313          */
1314         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1315         data[1] = scsi_id->login_orb_dma;
1316         sbp2util_cpu_to_be32_buffer(data, 8);
1317
1318         atomic_set(&scsi_id->sbp2_login_complete, 0);
1319
1320         SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1321                    (unsigned int)scsi_id->sbp2_management_agent_addr);
1322         hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1323         SBP2_DEBUG("sbp2_login_device: written");
1324
1325         /*
1326          * Wait for login status (up to 20 seconds)...
1327          */
1328         if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1329                 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1330                 return(-EIO);
1331         }
1332
1333         /*
1334          * Sanity. Make sure status returned matches login orb.
1335          */
1336         if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1337                 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1338                 return(-EIO);
1339         }
1340
1341         /*
1342          * Check status
1343          */
1344         if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1345             STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1346             STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1347
1348                 SBP2_ERR("Error logging into SBP-2 device - login failed");
1349                 return(-EIO);
1350         }
1351
1352         /*
1353          * Byte swap the login response, for use when reconnecting or
1354          * logging out.
1355          */
1356         sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1357
1358         /*
1359          * Grab our command block agent address from the login response.
1360          */
1361         SBP2_DEBUG("command_block_agent_hi = %x",
1362                    (unsigned int)scsi_id->login_response->command_block_agent_hi);
1363         SBP2_DEBUG("command_block_agent_lo = %x",
1364                    (unsigned int)scsi_id->login_response->command_block_agent_lo);
1365
1366         scsi_id->sbp2_command_block_agent_addr =
1367                 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1368         scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1369         scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1370
1371         SBP2_INFO("Logged into SBP-2 device");
1372
1373         return(0);
1374
1375 }
1376
1377 /*
1378  * This function is called in order to logout from a particular SBP-2
1379  * device, usually called during driver unload.
1380  */
1381 static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1382 {
1383         struct sbp2scsi_host_info *hi = scsi_id->hi;
1384         quadlet_t data[2];
1385
1386         SBP2_DEBUG("sbp2_logout_device");
1387
1388         /*
1389          * Set-up logout ORB
1390          */
1391         scsi_id->logout_orb->reserved1 = 0x0;
1392         scsi_id->logout_orb->reserved2 = 0x0;
1393         scsi_id->logout_orb->reserved3 = 0x0;
1394         scsi_id->logout_orb->reserved4 = 0x0;
1395
1396         scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(LOGOUT_REQUEST);
1397         scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1398
1399         /* Notify us when complete */
1400         scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1401
1402         scsi_id->logout_orb->reserved5 = 0x0;
1403         scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1404                                               SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->id);
1405         scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1406                                                SBP2_STATUS_FIFO_ADDRESS_HI);
1407
1408         /*
1409          * Byte swap ORB if necessary
1410          */
1411         sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1412
1413         sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1414                              "sbp2 logout orb", scsi_id->logout_orb_dma);
1415
1416         /*
1417          * Ok, let's write to the target's management agent register
1418          */
1419         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1420         data[1] = scsi_id->logout_orb_dma;
1421         sbp2util_cpu_to_be32_buffer(data, 8);
1422
1423         atomic_set(&scsi_id->sbp2_login_complete, 0);
1424
1425         hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1426
1427         /* Wait for device to logout...1 second. */
1428         sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ);
1429
1430         SBP2_INFO("Logged out of SBP-2 device");
1431
1432 #ifdef SBP2_USE_SCSI_ADDREM_HACK
1433         /* Now that we are logged out of the SBP-2 device, lets
1434          * try to un-hook ourselves from the SCSI subsystem */
1435         if (scsi_remove_single_device(hi->scsi_host, 0, scsi_id->id, 0))
1436                 SBP2_INFO("Unable to disconnect SBP-2 device from the SCSI subsystem");
1437 #endif
1438
1439         return 0;
1440 }
1441
1442 /*
1443  * This function is called in order to reconnect to a particular SBP-2
1444  * device, after a bus reset.
1445  */
1446 static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1447 {
1448         struct sbp2scsi_host_info *hi = scsi_id->hi;
1449         quadlet_t data[2];
1450
1451         SBP2_DEBUG("sbp2_reconnect_device");
1452
1453         /*
1454          * Set-up reconnect ORB
1455          */
1456         scsi_id->reconnect_orb->reserved1 = 0x0;
1457         scsi_id->reconnect_orb->reserved2 = 0x0;
1458         scsi_id->reconnect_orb->reserved3 = 0x0;
1459         scsi_id->reconnect_orb->reserved4 = 0x0;
1460
1461         scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(RECONNECT_REQUEST);
1462         scsi_id->reconnect_orb->login_ID_misc |=
1463                 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1464
1465         /* Notify us when complete */
1466         scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1467
1468         scsi_id->reconnect_orb->reserved5 = 0x0;
1469         scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1470                                                  SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->id);
1471         scsi_id->reconnect_orb->status_FIFO_hi =
1472                 (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI);
1473
1474         /*
1475          * Byte swap ORB if necessary
1476          */
1477         sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1478
1479         sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1480                              "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1481
1482         /*
1483          * Initialize status fifo
1484          */
1485         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1486
1487         /*
1488          * Ok, let's write to the target's management agent register
1489          */
1490         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1491         data[1] = scsi_id->reconnect_orb_dma;
1492         sbp2util_cpu_to_be32_buffer(data, 8);
1493
1494         atomic_set(&scsi_id->sbp2_login_complete, 0);
1495
1496         hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1497
1498         /*
1499          * Wait for reconnect status (up to 1 second)...
1500          */
1501         if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1502                 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1503                 return(-EIO);
1504         }
1505
1506         /*
1507          * Sanity. Make sure status returned matches reconnect orb.
1508          */
1509         if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1510                 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1511                 return(-EIO);
1512         }
1513
1514         /*
1515          * Check status
1516          */
1517         if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1518             STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1519             STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1520
1521                 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
1522                 return(-EIO);
1523         }
1524
1525         SBP2_INFO("Reconnected to SBP-2 device");
1526
1527         return(0);
1528
1529 }
1530
1531 /*
1532  * This function is called in order to set the busy timeout (number of
1533  * retries to attempt) on the sbp2 device.
1534  */
1535 static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1536 {
1537         quadlet_t data;
1538
1539         SBP2_DEBUG("sbp2_set_busy_timeout");
1540
1541         /*
1542          * Ok, let's write to the target's busy timeout register
1543          */
1544         data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1545
1546         if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) {
1547                 SBP2_ERR("sbp2_set_busy_timeout error");
1548         }
1549
1550         return(0);
1551 }
1552
1553 /*
1554  * This function is called to parse sbp2 device's config rom unit
1555  * directory. Used to determine things like sbp2 management agent offset,
1556  * and command set used (SCSI or RBC).
1557  */
1558 static void sbp2_parse_unit_directory(struct scsi_id_group *scsi_group,
1559                                       struct unit_directory *ud)
1560 {
1561         struct scsi_id_instance_data *scsi_id;
1562         struct list_head *lh;
1563         u64 management_agent_addr;
1564         u32 command_set_spec_id, command_set, unit_characteristics,
1565                 firmware_revision, workarounds;
1566         int i;
1567
1568         SBP2_DEBUG("sbp2_parse_unit_directory");
1569
1570         management_agent_addr = 0x0;
1571         command_set_spec_id = 0x0;
1572         command_set = 0x0;
1573         unit_characteristics = 0x0;
1574         firmware_revision = 0x0;
1575
1576         /* Handle different fields in the unit directory, based on keys */
1577         for (i = 0; i < ud->length; i++) {
1578                 switch (CONFIG_ROM_KEY(ud->quadlets[i])) {
1579                 case SBP2_CSR_OFFSET_KEY:
1580                         /* Save off the management agent address */
1581                         management_agent_addr =
1582                                 CSR_REGISTER_BASE +
1583                                 (CONFIG_ROM_VALUE(ud->quadlets[i]) << 2);
1584
1585                         SBP2_DEBUG("sbp2_management_agent_addr = %x",
1586                                    (unsigned int) management_agent_addr);
1587                         break;
1588
1589                 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1590                         /* Command spec organization */
1591                         command_set_spec_id
1592                                 = CONFIG_ROM_VALUE(ud->quadlets[i]);
1593                         SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1594                                    (unsigned int) command_set_spec_id);
1595                         break;
1596
1597                 case SBP2_COMMAND_SET_KEY:
1598                         /* Command set used by sbp2 device */
1599                         command_set = CONFIG_ROM_VALUE(ud->quadlets[i]);
1600                         SBP2_DEBUG("sbp2_command_set = %x",
1601                                    (unsigned int) command_set);
1602                         break;
1603
1604                 case SBP2_UNIT_CHARACTERISTICS_KEY:
1605                         /*
1606                          * Unit characterisitcs (orb related stuff
1607                          * that I'm not yet paying attention to)
1608                          */
1609                         unit_characteristics
1610                                 = CONFIG_ROM_VALUE(ud->quadlets[i]);
1611                         SBP2_DEBUG("sbp2_unit_characteristics = %x",
1612                                    (unsigned int) unit_characteristics);
1613                         break;
1614
1615                 case SBP2_DEVICE_TYPE_AND_LUN_KEY:
1616                         /*
1617                          * Device type and lun (used for
1618                          * detemining type of sbp2 device)
1619                          */
1620                         scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL);
1621                         if (!scsi_id) {
1622                                 SBP2_ERR("Out of memory adding scsi_id, not all LUN's will be added");
1623                                 break;
1624                         }
1625                         memset(scsi_id, 0, sizeof(*scsi_id));
1626
1627                         scsi_id->sbp2_device_type_and_lun
1628                                 = CONFIG_ROM_VALUE(ud->quadlets[i]);
1629                         SBP2_DEBUG("sbp2_device_type_and_lun = %x",
1630                                    (unsigned int) scsi_id->sbp2_device_type_and_lun);
1631                         list_add_tail(&scsi_id->list, &scsi_group->scsi_id_list);
1632                         break;
1633
1634                 case SBP2_FIRMWARE_REVISION_KEY:
1635                         /* Firmware revision */
1636                         firmware_revision
1637                                 = CONFIG_ROM_VALUE(ud->quadlets[i]);
1638                         if (sbp2_force_inquiry_hack)
1639                                 SBP2_INFO("sbp2_firmware_revision = %x",
1640                                    (unsigned int) firmware_revision);
1641                         else    SBP2_DEBUG("sbp2_firmware_revision = %x",
1642                                    (unsigned int) firmware_revision);
1643                         break;
1644
1645                 default:
1646                         break;
1647                 }
1648         }
1649
1650         /* This is the start of our broken device checking. We try to hack
1651          * around oddities and known defects.  */
1652         workarounds = 0x0;
1653
1654         /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1655          * bridge with 128KB max transfer size limitation. For sanity, we
1656          * only voice this when the current sbp2_max_sectors setting
1657          * exceeds the 128k limit. By default, that is not the case.
1658          *
1659          * It would be really nice if we could detect this before the scsi
1660          * host gets initialized. That way we can down-force the
1661          * sbp2_max_sectors to account for it. That is not currently
1662          * possible.  */
1663         if ((firmware_revision & 0xffff00) ==
1664                         SBP2_128KB_BROKEN_FIRMWARE &&
1665                         (sbp2_max_sectors * 512) > (128 * 1024)) {
1666                 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.",
1667                                 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1668                 SBP2_WARN("WARNING: Current sbp2_max_sectors setting is larger than 128KB (%d sectors)!",
1669                                 sbp2_max_sectors);
1670                 workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER;
1671         }
1672
1673         /* Check for a blacklisted set of devices that require us to force
1674          * a 36 byte host inquiry. This can be overriden as a module param
1675          * (to force all hosts).  */
1676         for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) {
1677                 if ((firmware_revision & 0xffff00) ==
1678                                 sbp2_broken_inquiry_list[i]) {
1679                         SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
1680                                         NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1681                         workarounds |= SBP2_BREAKAGE_INQUIRY_HACK;
1682                         break; /* No need to continue. */
1683                 }
1684         }
1685
1686         /* If this is a logical unit directory entry, process the parent
1687          * to get the common values. */
1688         if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1689                 sbp2_parse_unit_directory(scsi_group, ud->parent);
1690         } else {
1691                 /* If our list is empty, add a base scsi_id (happens in a normal
1692                  * case where there is no logical_unit_number entry */
1693                 if (list_empty(&scsi_group->scsi_id_list)) {
1694                         scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL);
1695                         if (!scsi_id) {
1696                                 SBP2_ERR("Out of memory adding scsi_id");
1697                                 return;
1698                         }
1699                         memset(scsi_id, 0, sizeof(*scsi_id));
1700
1701                         scsi_id->sbp2_device_type_and_lun = SBP2_DEVICE_TYPE_LUN_UNINITIALIZED;
1702                         list_add_tail(&scsi_id->list, &scsi_group->scsi_id_list);
1703                 }
1704
1705                 /* Update the generic fields in all the LUN's */
1706                 list_for_each (lh, &scsi_group->scsi_id_list) {
1707                         scsi_id = list_entry(lh, struct scsi_id_instance_data, list);
1708
1709                         scsi_id->sbp2_management_agent_addr = management_agent_addr;
1710                         scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1711                         scsi_id->sbp2_command_set = command_set;
1712                         scsi_id->sbp2_unit_characteristics = unit_characteristics;
1713                         scsi_id->sbp2_firmware_revision = firmware_revision;
1714                         scsi_id->workarounds = workarounds;
1715                 }
1716         }
1717 }
1718
1719 /*
1720  * This function is called in order to determine the max speed and packet
1721  * size we can use in our ORBs. Note, that we (the driver and host) only
1722  * initiate the transaction. The SBP-2 device actually transfers the data
1723  * (by reading from the DMA area we tell it). This means that the SBP-2
1724  * device decides the actual maximum data it can transfer. We just tell it
1725  * the speed that it needs to use, and the max_rec the host supports, and
1726  * it takes care of the rest.
1727  */
1728 static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1729 {
1730         struct sbp2scsi_host_info *hi = scsi_id->hi;
1731
1732         SBP2_DEBUG("sbp2_max_speed_and_size");
1733
1734         /* Initial setting comes from the hosts speed map */
1735         scsi_id->speed_code = hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64
1736                                                   + NODEID_TO_NODE(scsi_id->ne->nodeid)];
1737
1738         /* Bump down our speed if the user requested it */
1739         if (scsi_id->speed_code > sbp2_max_speed) {
1740                 scsi_id->speed_code = sbp2_max_speed;
1741                 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1742                          hpsb_speedto_str[scsi_id->speed_code]);
1743         }
1744
1745         /* Payload size is the lesser of what our speed supports and what
1746          * our host supports.  */
1747         scsi_id->max_payload_size = min(sbp2_speedto_max_payload[scsi_id->speed_code],
1748                                         (u8)(((be32_to_cpu(hi->host->csr.rom[2]) >> 12) & 0xf) - 1));
1749
1750         SBP2_ERR("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1751                  NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1752                  hpsb_speedto_str[scsi_id->speed_code],
1753                  1 << ((u32)scsi_id->max_payload_size + 2));
1754
1755         return(0);
1756 }
1757
1758 /*
1759  * This function is called in order to perform a SBP-2 agent reset.
1760  */
1761 static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1762 {
1763         struct sbp2scsi_host_info *hi = scsi_id->hi;
1764         struct hpsb_packet *packet;
1765         quadlet_t data;
1766
1767         SBP2_DEBUG("sbp2_agent_reset");
1768
1769         /*
1770          * Ok, let's write to the target's management agent register
1771          */
1772         data = ntohl(SBP2_AGENT_RESET_DATA);
1773         packet = sbp2util_allocate_write_packet(hi, scsi_id->ne,
1774                                                 scsi_id->sbp2_command_block_agent_addr +
1775                                                 SBP2_AGENT_RESET_OFFSET,
1776                                                 4, &data, wait ? 0 : 1);
1777
1778         if (!packet) {
1779                 SBP2_ERR("sbp2util_allocate_write_packet failed");
1780                 return(-ENOMEM);
1781         }
1782
1783         if (!hpsb_send_packet(packet)) {
1784                 SBP2_ERR("hpsb_send_packet failed");
1785                 sbp2_free_packet(packet);
1786                 return(-EIO);
1787         }
1788
1789         if (wait) {
1790                 down(&packet->state_change);
1791                 down(&packet->state_change);
1792                 sbp2_free_packet(packet);
1793         }
1794
1795         /*
1796          * Need to make sure orb pointer is written on next command
1797          */
1798         scsi_id->last_orb = NULL;
1799
1800         return(0);
1801 }
1802
1803 /*
1804  * This function is called to create the actual command orb and s/g list
1805  * out of the scsi command itself.
1806  */
1807 static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1808                                    struct sbp2_command_info *command,
1809                                    unchar *scsi_cmd,
1810                                    unsigned int scsi_use_sg,
1811                                    unsigned int scsi_request_bufflen,
1812                                    void *scsi_request_buffer,
1813                                    unsigned char scsi_dir)
1814 {
1815         struct sbp2scsi_host_info *hi = scsi_id->hi;
1816         struct scatterlist *sgpnt = (struct scatterlist *) scsi_request_buffer;
1817         struct sbp2_command_orb *command_orb = &command->command_orb;
1818         struct sbp2_unrestricted_page_table *scatter_gather_element =
1819                 &command->scatter_gather_element[0];
1820         int dma_dir = scsi_to_pci_dma_dir (scsi_dir);
1821         u32 sg_count, sg_len, orb_direction;
1822         dma_addr_t sg_addr;
1823         int i;
1824
1825         /*
1826          * Set-up our command ORB..
1827          *
1828          * NOTE: We're doing unrestricted page tables (s/g), as this is
1829          * best performance (at least with the devices I have). This means
1830          * that data_size becomes the number of s/g elements, and
1831          * page_size should be zero (for unrestricted).
1832          */
1833         command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1834         command_orb->next_ORB_lo = 0x0;
1835         command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1836         command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
1837         command_orb->misc |= ORB_SET_NOTIFY(1);         /* Notify us when complete */
1838
1839         /*
1840          * Get the direction of the transfer. If the direction is unknown, then use our
1841          * goofy table as a back-up.
1842          */
1843         switch (scsi_dir) {
1844                 case SCSI_DATA_NONE:
1845                         orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1846                         break;
1847                 case SCSI_DATA_WRITE:
1848                         orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1849                         break;
1850                 case SCSI_DATA_READ:
1851                         orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1852                         break;
1853                 case SCSI_DATA_UNKNOWN:
1854                 default:
1855                         SBP2_ERR("SCSI data transfer direction not specified. "
1856                                  "Update the SBP2 direction table in sbp2.h if "
1857                                  "necessary for your application");
1858                         print_command (scsi_cmd);
1859                         orb_direction = sbp2scsi_direction_table[*scsi_cmd];
1860                         break;
1861         }
1862
1863         /*
1864          * Set-up our pagetable stuff... unfortunately, this has become
1865          * messier than I'd like. Need to clean this up a bit.   ;-)
1866          */
1867         if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1868
1869                 SBP2_DEBUG("No data transfer");
1870
1871                 /*
1872                  * Handle no data transfer
1873                  */
1874                 command_orb->data_descriptor_hi = 0x0;
1875                 command_orb->data_descriptor_lo = 0x0;
1876                 command_orb->misc |= ORB_SET_DIRECTION(1);
1877
1878         } else if (scsi_use_sg) {
1879
1880                 SBP2_DEBUG("Use scatter/gather");
1881
1882                 /*
1883                  * Special case if only one element (and less than 64KB in size)
1884                  */
1885                 if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1886
1887                         SBP2_DEBUG("Only one s/g element");
1888                         command->dma_dir = dma_dir;
1889                         command->dma_size = sgpnt[0].length;
1890                         command->dma_type = CMD_DMA_PAGE;
1891                         command->cmd_dma = pci_map_page(hi->host->pdev,
1892                                                         sgpnt[0].page,
1893                                                         sgpnt[0].offset,
1894                                                         command->dma_size,
1895                                                         command->dma_dir);
1896                         SBP2_DMA_ALLOC("single page scatter element");
1897
1898                         command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1899                         command_orb->data_descriptor_lo = command->cmd_dma;
1900                         command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1901                         command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1902
1903                 } else {
1904                         int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir);
1905                         SBP2_DMA_ALLOC("scatter list");
1906
1907                         command->dma_size = scsi_use_sg;
1908                         command->dma_dir = dma_dir;
1909                         command->sge_buffer = sgpnt;
1910
1911                         /* use page tables (s/g) */
1912                         command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1913                         command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1914                         command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1915                         command_orb->data_descriptor_lo = command->sge_dma;
1916
1917                         /*
1918                          * Loop through and fill out our sbp-2 page tables
1919                          * (and split up anything too large)
1920                          */
1921                         for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1922                                 sg_len = sg_dma_len(sgpnt);
1923                                 sg_addr = sg_dma_address(sgpnt);
1924                                 while (sg_len) {
1925                                         scatter_gather_element[sg_count].segment_base_lo = sg_addr;
1926                                         if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1927                                                 scatter_gather_element[sg_count].length_segment_base_hi =
1928                                                         PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1929                                                 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1930                                                 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1931                                         } else {
1932                                                 scatter_gather_element[sg_count].length_segment_base_hi =
1933                                                         PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1934                                                 sg_len = 0;
1935                                         }
1936                                         sg_count++;
1937                                 }
1938                         }
1939
1940                         /* Number of page table (s/g) elements */
1941                         command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1942
1943                         sbp2util_packet_dump(scatter_gather_element,
1944                                              (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1945                                              "sbp2 s/g list", command->sge_dma);
1946
1947                         /*
1948                          * Byte swap page tables if necessary
1949                          */
1950                         sbp2util_cpu_to_be32_buffer(scatter_gather_element,
1951                                                     (sizeof(struct sbp2_unrestricted_page_table)) *
1952                                                     sg_count);
1953
1954                 }
1955
1956         } else {
1957
1958                 SBP2_DEBUG("No scatter/gather");
1959
1960                 command->dma_dir = dma_dir;
1961                 command->dma_size = scsi_request_bufflen;
1962                 command->dma_type = CMD_DMA_SINGLE;
1963                 command->cmd_dma = pci_map_single (hi->host->pdev, scsi_request_buffer,
1964                                                    command->dma_size,
1965                                                    command->dma_dir);
1966                 SBP2_DMA_ALLOC("single bulk");
1967
1968                 /*
1969                  * Handle case where we get a command w/o s/g enabled (but
1970                  * check for transfers larger than 64K)
1971                  */
1972                 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1973
1974                         command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1975                         command_orb->data_descriptor_lo = command->cmd_dma;
1976                         command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1977                         command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1978
1979                         /*
1980                          * Sanity, in case our direction table is not
1981                          * up-to-date
1982                          */
1983                         if (!scsi_request_bufflen) {
1984                                 command_orb->data_descriptor_hi = 0x0;
1985                                 command_orb->data_descriptor_lo = 0x0;
1986                                 command_orb->misc |= ORB_SET_DIRECTION(1);
1987                         }
1988
1989                 } else {
1990                         /*
1991                          * Need to turn this into page tables, since the
1992                          * buffer is too large.
1993                          */
1994                         command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1995                         command_orb->data_descriptor_lo = command->sge_dma;
1996
1997                         /* Use page tables (s/g) */
1998                         command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1999                         command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
2000
2001                         /*
2002                          * fill out our sbp-2 page tables (and split up
2003                          * the large buffer)
2004                          */
2005                         sg_count = 0;
2006                         sg_len = scsi_request_bufflen;
2007                         sg_addr = command->cmd_dma;
2008                         while (sg_len) {
2009                                 scatter_gather_element[sg_count].segment_base_lo = sg_addr;
2010                                 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
2011                                         scatter_gather_element[sg_count].length_segment_base_hi =
2012                                                 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
2013                                         sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
2014                                         sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
2015                                 } else {
2016                                         scatter_gather_element[sg_count].length_segment_base_hi =
2017                                                 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
2018                                         sg_len = 0;
2019                                 }
2020                                 sg_count++;
2021                         }
2022
2023                         /* Number of page table (s/g) elements */
2024                         command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
2025
2026                         sbp2util_packet_dump(scatter_gather_element,
2027                                              (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
2028                                              "sbp2 s/g list", command->sge_dma);
2029
2030                         /*
2031                          * Byte swap page tables if necessary
2032                          */
2033                         sbp2util_cpu_to_be32_buffer(scatter_gather_element,
2034                                                     (sizeof(struct sbp2_unrestricted_page_table)) *
2035                                                      sg_count);
2036
2037                 }
2038
2039         }
2040
2041         /*
2042          * Byte swap command ORB if necessary
2043          */
2044         sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
2045
2046         /*
2047          * Put our scsi command in the command ORB
2048          */
2049         memset(command_orb->cdb, 0, 12);
2050         memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
2051
2052         return(0);
2053 }
2054
2055 /*
2056  * This function is called in order to begin a regular SBP-2 command.
2057  */
2058 static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
2059                                  struct sbp2_command_info *command)
2060 {
2061         struct sbp2scsi_host_info *hi = scsi_id->hi;
2062         struct hpsb_packet *packet;
2063         struct sbp2_command_orb *command_orb = &command->command_orb;
2064
2065         outstanding_orb_incr;
2066         SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
2067                         command_orb, global_outstanding_command_orbs);
2068
2069         pci_dma_sync_single(hi->host->pdev, command->command_orb_dma,
2070                             sizeof(struct sbp2_command_orb),
2071                             PCI_DMA_BIDIRECTIONAL);
2072         pci_dma_sync_single(hi->host->pdev, command->sge_dma,
2073                             sizeof(command->scatter_gather_element),
2074                             PCI_DMA_BIDIRECTIONAL);
2075         /*
2076          * Check to see if there are any previous orbs to use
2077          */
2078         if (scsi_id->last_orb == NULL) {
2079
2080                 /*
2081                  * Ok, let's write to the target's management agent register
2082                  */
2083                 if (hpsb_node_entry_valid(scsi_id->ne)) {
2084
2085                         packet = sbp2util_allocate_write_packet(hi, scsi_id->ne,
2086                                                                 scsi_id->sbp2_command_block_agent_addr +
2087                                                                 SBP2_ORB_POINTER_OFFSET, 8, NULL, 1);
2088
2089                         if (!packet) {
2090                                 SBP2_ERR("sbp2util_allocate_write_packet failed");
2091                                 return(-ENOMEM);
2092                         }
2093
2094                         packet->data[0] = ORB_SET_NODE_ID(hi->host->node_id);
2095                         packet->data[1] = command->command_orb_dma;
2096                         sbp2util_cpu_to_be32_buffer(packet->data, 8);
2097
2098                         SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
2099
2100                         if (!hpsb_send_packet(packet)) {
2101                                 SBP2_ERR("hpsb_send_packet failed");
2102                                 sbp2_free_packet(packet);
2103                                 return(-EIO);
2104                         }
2105
2106                         SBP2_ORB_DEBUG("write command agent complete");
2107                 }
2108
2109                 scsi_id->last_orb = command_orb;
2110                 scsi_id->last_orb_dma = command->command_orb_dma;
2111
2112         } else {
2113
2114                 /*
2115                  * We have an orb already sent (maybe or maybe not
2116                  * processed) that we can append this orb to. So do so,
2117                  * and ring the doorbell. Have to be very careful
2118                  * modifying these next orb pointers, as they are accessed
2119                  * both by the sbp2 device and us.
2120                  */
2121                 scsi_id->last_orb->next_ORB_lo =
2122                         cpu_to_be32(command->command_orb_dma);
2123                 /* Tells hardware that this pointer is valid */
2124                 scsi_id->last_orb->next_ORB_hi = 0x0;
2125                 pci_dma_sync_single(hi->host->pdev, scsi_id->last_orb_dma,
2126                                     sizeof(struct sbp2_command_orb),
2127                                     PCI_DMA_BIDIRECTIONAL);
2128
2129                 /*
2130                  * Ring the doorbell
2131                  */
2132                 if (hpsb_node_entry_valid(scsi_id->ne)) {
2133                         quadlet_t data = cpu_to_be32(command->command_orb_dma);
2134
2135                         packet = sbp2util_allocate_write_packet(hi, scsi_id->ne,
2136                                         scsi_id->sbp2_command_block_agent_addr +
2137                                         SBP2_DOORBELL_OFFSET, 4, &data, 1);
2138
2139                         if (!packet) {
2140                                 SBP2_ERR("sbp2util_allocate_write_packet failed");
2141                                 return(-ENOMEM);
2142                         }
2143
2144                         SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
2145
2146                         if (!hpsb_send_packet(packet)) {
2147                                 SBP2_ERR("hpsb_send_packet failed");
2148                                 sbp2_free_packet(packet);
2149                                 return(-EIO);
2150                         }
2151                 }
2152
2153                 scsi_id->last_orb = command_orb;
2154                 scsi_id->last_orb_dma = command->command_orb_dma;
2155
2156         }
2157         return(0);
2158 }
2159
2160 /*
2161  * This function is called in order to begin a regular SBP-2 command.
2162  */
2163 static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2164                              Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
2165 {
2166         unchar *cmd = (unchar *) SCpnt->cmnd;
2167         unsigned int request_bufflen = SCpnt->request_bufflen;
2168         struct sbp2_command_info *command;
2169
2170         SBP2_DEBUG("sbp2_send_command");
2171 #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2172         printk("[scsi command]\n   ");
2173         print_command (cmd);
2174 #endif
2175         SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2176         SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2177
2178         /*
2179          * Allocate a command orb and s/g structure
2180          */
2181         command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2182         if (!command) {
2183                 return(-EIO);
2184         }
2185
2186         /*
2187          * The scsi stack sends down a request_bufflen which does not match the
2188          * length field in the scsi cdb. This causes some sbp2 devices to
2189          * reject this inquiry command. Fix the request_bufflen.
2190          */
2191         if (*cmd == INQUIRY) {
2192                 if (sbp2_force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK)
2193                         request_bufflen = cmd[4] = 0x24;
2194                 else
2195                         request_bufflen = cmd[4];
2196         }
2197
2198         /*
2199          * Now actually fill in the comamnd orb and sbp2 s/g list
2200          */
2201         sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2202                                 request_bufflen, SCpnt->request_buffer,
2203                                 SCpnt->sc_data_direction);
2204         /*
2205          * Update our cdb if necessary (to handle sbp2 RBC command set
2206          * differences). This is where the command set hacks go!   =)
2207          */
2208         sbp2_check_sbp2_command(scsi_id, command->command_orb.cdb);
2209
2210         sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2211                              "sbp2 command orb", command->command_orb_dma);
2212
2213         /*
2214          * Initialize status fifo
2215          */
2216         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2217
2218         /*
2219          * Link up the orb, and ring the doorbell if needed
2220          */
2221         sbp2_link_orb_command(scsi_id, command);
2222
2223         return(0);
2224 }
2225
2226
2227 /*
2228  * This function deals with command set differences between Linux scsi
2229  * command set and sbp2 RBC command set.
2230  */
2231 static void sbp2_check_sbp2_command(struct scsi_id_instance_data *scsi_id, unchar *cmd)
2232 {
2233         unchar new_cmd[16];
2234         u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
2235
2236         SBP2_DEBUG("sbp2_check_sbp2_command");
2237
2238         switch (*cmd) {
2239
2240                 case READ_6:
2241
2242                         if (sbp2_command_conversion_device_type(device_type)) {
2243
2244                                 SBP2_DEBUG("Convert READ_6 to READ_10");
2245
2246                                 /*
2247                                  * Need to turn read_6 into read_10
2248                                  */
2249                                 new_cmd[0] = 0x28;
2250                                 new_cmd[1] = (cmd[1] & 0xe0);
2251                                 new_cmd[2] = 0x0;
2252                                 new_cmd[3] = (cmd[1] & 0x1f);
2253                                 new_cmd[4] = cmd[2];
2254                                 new_cmd[5] = cmd[3];
2255                                 new_cmd[6] = 0x0;
2256                                 new_cmd[7] = 0x0;
2257                                 new_cmd[8] = cmd[4];
2258                                 new_cmd[9] = cmd[5];
2259
2260                                 memcpy(cmd, new_cmd, 10);
2261
2262                         }
2263
2264                         break;
2265
2266                 case WRITE_6:
2267
2268                         if (sbp2_command_conversion_device_type(device_type)) {
2269
2270                                 SBP2_DEBUG("Convert WRITE_6 to WRITE_10");
2271
2272                                 /*
2273                                  * Need to turn write_6 into write_10
2274                                  */
2275                                 new_cmd[0] = 0x2a;
2276                                 new_cmd[1] = (cmd[1] & 0xe0);
2277                                 new_cmd[2] = 0x0;
2278                                 new_cmd[3] = (cmd[1] & 0x1f);
2279                                 new_cmd[4] = cmd[2];
2280                                 new_cmd[5] = cmd[3];
2281                                 new_cmd[6] = 0x0;
2282                                 new_cmd[7] = 0x0;
2283                                 new_cmd[8] = cmd[4];
2284                                 new_cmd[9] = cmd[5];
2285
2286                                 memcpy(cmd, new_cmd, 10);
2287
2288                         }
2289
2290                         break;
2291
2292                 case MODE_SENSE:
2293
2294                         if (sbp2_command_conversion_device_type(device_type)) {
2295
2296                                 SBP2_DEBUG("Convert MODE_SENSE_6 to MODE_SENSE_10");
2297
2298                                 /*
2299                                  * Need to turn mode_sense_6 into mode_sense_10
2300                                  */
2301                                 new_cmd[0] = 0x5a;
2302                                 new_cmd[1] = cmd[1];
2303                                 new_cmd[2] = cmd[2];
2304                                 new_cmd[3] = 0x0;
2305                                 new_cmd[4] = 0x0;
2306                                 new_cmd[5] = 0x0;
2307                                 new_cmd[6] = 0x0;
2308                                 new_cmd[7] = 0x0;
2309                                 new_cmd[8] = cmd[4];
2310                                 new_cmd[9] = cmd[5];
2311
2312                                 memcpy(cmd, new_cmd, 10);
2313
2314                         }
2315
2316                         break;
2317
2318                 case MODE_SELECT:
2319
2320                         /*
2321                          * TODO. Probably need to change mode select to 10 byte version
2322                          */
2323
2324                 default:
2325                         break;
2326         }
2327
2328         return;
2329 }
2330
2331 /*
2332  * Translates SBP-2 status into SCSI sense data for check conditions
2333  */
2334 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2335 {
2336         SBP2_DEBUG("sbp2_status_to_sense_data");
2337
2338         /*
2339          * Ok, it's pretty ugly...   ;-)
2340          */
2341         sense_data[0] = 0x70;
2342         sense_data[1] = 0x0;
2343         sense_data[2] = sbp2_status[9];
2344         sense_data[3] = sbp2_status[12];
2345         sense_data[4] = sbp2_status[13];
2346         sense_data[5] = sbp2_status[14];
2347         sense_data[6] = sbp2_status[15];
2348         sense_data[7] = 10;
2349         sense_data[8] = sbp2_status[16];
2350         sense_data[9] = sbp2_status[17];
2351         sense_data[10] = sbp2_status[18];
2352         sense_data[11] = sbp2_status[19];
2353         sense_data[12] = sbp2_status[10];
2354         sense_data[13] = sbp2_status[11];
2355         sense_data[14] = sbp2_status[20];
2356         sense_data[15] = sbp2_status[21];
2357
2358         return(sbp2_status[8] & 0x3f);  /* return scsi status */
2359 }
2360
2361 /*
2362  * This function is called after a command is completed, in order to do any necessary SBP-2
2363  * response data translations for the SCSI stack
2364  */
2365 static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
2366                                      Scsi_Cmnd *SCpnt)
2367 {
2368         u8 *scsi_buf = SCpnt->request_buffer;
2369         u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
2370
2371         SBP2_DEBUG("sbp2_check_sbp2_response");
2372
2373         switch (SCpnt->cmnd[0]) {
2374
2375                 case INQUIRY:
2376
2377                         /*
2378                          * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill
2379                          * this information in from the inquiry response data. Lun is set to zero.
2380                          */
2381                         if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
2382                                 SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data");
2383                                 scsi_id->sbp2_device_type_and_lun = (scsi_buf[0] & 0x1f) << 16;
2384                         }
2385
2386                         /*
2387                          * Make sure data length is ok. Minimum length is 36 bytes
2388                          */
2389                         if (scsi_buf[4] == 0) {
2390                                 scsi_buf[4] = 36 - 5;
2391                         }
2392
2393                         /*
2394                          * Check for Simple Direct Access Device and change it to TYPE_DISK
2395                          */
2396                         if ((scsi_buf[0] & 0x1f) == TYPE_SDAD) {
2397                                 SBP2_DEBUG("Changing TYPE_SDAD to TYPE_DISK");
2398                                 scsi_buf[0] &= 0xe0;
2399                         }
2400
2401                         /*
2402                          * Fix ansi revision and response data format
2403                          */
2404                         scsi_buf[2] |= 2;
2405                         scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
2406
2407                         break;
2408
2409                 case MODE_SENSE:
2410
2411                         if (sbp2_command_conversion_device_type(device_type)) {
2412
2413                                 SBP2_DEBUG("Modify mode sense response (10 byte version)");
2414
2415                                 scsi_buf[0] = scsi_buf[1];      /* Mode data length */
2416                                 scsi_buf[1] = scsi_buf[2];      /* Medium type */
2417                                 scsi_buf[2] = scsi_buf[3];      /* Device specific parameter */
2418                                 scsi_buf[3] = scsi_buf[7];      /* Block descriptor length */
2419                                 memcpy(scsi_buf + 4, scsi_buf + 8, scsi_buf[0]);
2420
2421                         }
2422
2423                         break;
2424
2425                 case MODE_SELECT:
2426
2427                         /*
2428                          * TODO. Probably need to change mode select to 10 byte version
2429                          */
2430
2431                 default:
2432                         break;
2433         }
2434         return;
2435 }
2436
2437 /*
2438  * This function deals with status writes from the SBP-2 device
2439  */
2440 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2441                                     quadlet_t *data, u64 addr, size_t length, u16 fl)
2442 {
2443         struct sbp2scsi_host_info *hi = NULL;
2444         struct scsi_id_instance_data *scsi_id = NULL;
2445         u32 id;
2446         unsigned long flags;
2447         Scsi_Cmnd *SCpnt = NULL;
2448         u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2449         struct sbp2_command_info *command;
2450
2451         SBP2_DEBUG("sbp2_handle_status_write");
2452
2453         sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2454
2455         if (!host) {
2456                 SBP2_ERR("host is NULL - this is bad!");
2457                 return(RCODE_ADDRESS_ERROR);
2458         }
2459
2460         hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2461
2462         if (!hi) {
2463                 SBP2_ERR("host info is NULL - this is bad!");
2464                 return(RCODE_ADDRESS_ERROR);
2465         }
2466
2467         spin_lock_irqsave(&hi->sbp2_command_lock, flags);
2468
2469         /*
2470          * Find our scsi_id structure by looking at the status fifo address written to by
2471          * the sbp2 device.
2472          */
2473         id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS));
2474         scsi_id = hi->scsi_id[id];
2475
2476         if (!scsi_id) {
2477                 SBP2_ERR("scsi_id is NULL - device is gone?");
2478                 spin_unlock_irqrestore(&hi->sbp2_command_lock, flags);
2479                 return(RCODE_ADDRESS_ERROR);
2480         }
2481
2482         /*
2483          * Put response into scsi_id status fifo...
2484          */
2485         memcpy(&scsi_id->status_block, data, length);
2486
2487         /*
2488          * Byte swap first two quadlets (8 bytes) of status for processing
2489          */
2490         sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2491
2492         /*
2493          * Handle command ORB status here if necessary. First, need to match status with command.
2494          */
2495         command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2496         if (command) {
2497
2498                 SBP2_DEBUG("Found status for command ORB");
2499                 pci_dma_sync_single(hi->host->pdev, command->command_orb_dma,
2500                                     sizeof(struct sbp2_command_orb),
2501                                     PCI_DMA_BIDIRECTIONAL);
2502                 pci_dma_sync_single(hi->host->pdev, command->sge_dma,
2503                                     sizeof(command->scatter_gather_element),
2504                                     PCI_DMA_BIDIRECTIONAL);
2505
2506                 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2507                 outstanding_orb_decr;
2508
2509                 /*
2510                  * Matched status with command, now grab scsi command pointers and check status
2511                  */
2512                 SCpnt = command->Current_SCpnt;
2513                 sbp2util_mark_command_completed(scsi_id, command);
2514
2515                 if (SCpnt) {
2516
2517                         /*
2518                          * See if the target stored any scsi status information
2519                          */
2520                         if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2521                                 /*
2522                                  * Translate SBP-2 status to SCSI sense data
2523                                  */
2524                                 SBP2_DEBUG("CHECK CONDITION");
2525                                 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2526                         }
2527
2528                         /*
2529                          * Check to see if the dead bit is set. If so, we'll have to initiate
2530                          * a fetch agent reset.
2531                          */
2532                         if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2533
2534                                 /*
2535                                  * Initiate a fetch agent reset.
2536                                  */
2537                                 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2538                                 sbp2_agent_reset(scsi_id, 0);
2539                         }
2540
2541                         SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2542                 }
2543
2544                 /*
2545                  * Check here to see if there are no commands in-use. If there are none, we can
2546                  * null out last orb so that next time around we write directly to the orb pointer...
2547                  * Quick start saves one 1394 bus transaction.
2548                  */
2549                 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2550                         scsi_id->last_orb = NULL;
2551                 }
2552
2553         } else {
2554
2555                 /*
2556                  * It's probably a login/logout/reconnect status.
2557                  */
2558                 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2559                     (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2560                     (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2561                     (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2562                         atomic_set(&scsi_id->sbp2_login_complete, 1);
2563                 }
2564         }
2565
2566         spin_unlock_irqrestore(&hi->sbp2_command_lock, flags);
2567
2568
2569         if (SCpnt) {
2570
2571                 /*
2572                  * Complete the SCSI command.
2573                  *
2574                  * Only do it after we've released the sbp2_command_lock,
2575                  * as it might otherwise deadlock with the
2576                  * io_request_lock (in sbp2scsi_queuecommand).
2577                  */
2578                 SBP2_DEBUG("Completing SCSI command");
2579                 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2580                                           command->Current_done);
2581                 SBP2_ORB_DEBUG("command orb completed");
2582         }
2583
2584         return(RCODE_COMPLETE);
2585 }
2586
2587
2588 /**************************************
2589  * SCSI interface related section
2590  **************************************/
2591
2592 /*
2593  * This routine is the main request entry routine for doing I/O. It is
2594  * called from the scsi stack directly.
2595  */
2596 static int sbp2scsi_queuecommand (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
2597 {
2598         struct sbp2scsi_host_info *hi = NULL;
2599         struct scsi_id_instance_data *scsi_id = NULL;
2600         unsigned long flags;
2601
2602         SBP2_DEBUG("sbp2scsi_queuecommand");
2603
2604         /*
2605          * Pull our host info and scsi id instance data from the scsi command
2606          */
2607         hi = hpsb_get_hostinfo_bykey(&sbp2_highlevel, (unsigned long)SCpnt->device->host->hostt);
2608
2609         if (!hi) {
2610                 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2611                 SCpnt->result = DID_NO_CONNECT << 16;
2612                 done (SCpnt);
2613                 return(0);
2614         }
2615
2616         scsi_id = hi->scsi_id[SCpnt->target];
2617
2618         /*
2619          * If scsi_id is null, it means there is no device in this slot,
2620          * so we should return selection timeout.
2621          */
2622         if (!scsi_id) {
2623                 SCpnt->result = DID_NO_CONNECT << 16;
2624                 done (SCpnt);
2625                 return(0);
2626         }
2627
2628         /*
2629          * Until we handle multiple luns, just return selection time-out
2630          * to any IO directed at non-zero LUNs
2631          */
2632         if (SCpnt->lun) {
2633                 SCpnt->result = DID_NO_CONNECT << 16;
2634                 done (SCpnt);
2635                 return(0);
2636         }
2637
2638         /*
2639          * Check for request sense command, and handle it here
2640          * (autorequest sense)
2641          */
2642         if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2643                 SBP2_DEBUG("REQUEST_SENSE");
2644                 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2645                 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2646                 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
2647                 return(0);
2648         }
2649
2650         /*
2651          * Check to see if we are in the middle of a bus reset.
2652          */
2653         if (!hpsb_node_entry_valid(scsi_id->ne)) {
2654                 SBP2_ERR("Bus reset in progress - rejecting command");
2655                 SCpnt->result = DID_BUS_BUSY << 16;
2656                 done (SCpnt);
2657                 return(0);
2658         }
2659
2660         /*
2661          * Try and send our SCSI command
2662          */
2663         spin_lock_irqsave(&hi->sbp2_command_lock, flags);
2664         if (sbp2_send_command(scsi_id, SCpnt, done)) {
2665                 SBP2_ERR("Error sending SCSI command");
2666                 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2667                                           SCpnt, done);
2668         }
2669         spin_unlock_irqrestore(&hi->sbp2_command_lock, flags);
2670
2671         return(0);
2672 }
2673
2674 /*
2675  * This function is called in order to complete all outstanding SBP-2
2676  * commands (in case of resets, etc.).
2677  */
2678 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2679                                            u32 status)
2680 {
2681         struct sbp2scsi_host_info *hi = scsi_id->hi;
2682         struct list_head *lh;
2683         struct sbp2_command_info *command;
2684
2685         SBP2_DEBUG("sbp2_complete_all_commands");
2686
2687         while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2688                 SBP2_DEBUG("Found pending command to complete");
2689                 lh = scsi_id->sbp2_command_orb_inuse.next;
2690                 command = list_entry(lh, struct sbp2_command_info, list);
2691                 pci_dma_sync_single(hi->host->pdev, command->command_orb_dma,
2692                                     sizeof(struct sbp2_command_orb),
2693                                     PCI_DMA_BIDIRECTIONAL);
2694                 pci_dma_sync_single(hi->host->pdev, command->sge_dma,
2695                                     sizeof(command->scatter_gather_element),
2696                                     PCI_DMA_BIDIRECTIONAL);
2697                 sbp2util_mark_command_completed(scsi_id, command);
2698                 if (command->Current_SCpnt) {
2699                         void (*done)(Scsi_Cmnd *) = command->Current_done;
2700                         command->Current_SCpnt->result = status << 16;
2701                         done (command->Current_SCpnt);
2702                 }
2703         }
2704
2705         return;
2706 }
2707
2708 /*
2709  * This function is called in order to complete a regular SBP-2 command.
2710  *
2711  * This can be called in interrupt context.
2712  */
2713 static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2714                                       u32 scsi_status, Scsi_Cmnd *SCpnt,
2715                                       void (*done)(Scsi_Cmnd *))
2716 {
2717         unsigned long flags;
2718
2719         SBP2_DEBUG("sbp2scsi_complete_command");
2720
2721         /*
2722          * Sanity
2723          */
2724         if (!SCpnt) {
2725                 SBP2_ERR("SCpnt is NULL");
2726                 return;
2727         }
2728
2729         /*
2730          * If a bus reset is in progress and there was an error, don't
2731          * complete the command, just let it get retried at the end of the
2732          * bus reset.
2733          */
2734         if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2735                 SBP2_ERR("Bus reset in progress - retry command later");
2736                 return;
2737         }
2738
2739         /*
2740          * Switch on scsi status
2741          */
2742         switch (scsi_status) {
2743                 case SBP2_SCSI_STATUS_GOOD:
2744                         SCpnt->result = DID_OK;
2745                         break;
2746
2747                 case SBP2_SCSI_STATUS_BUSY:
2748                         SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2749                         SCpnt->result = DID_BUS_BUSY << 16;
2750                         break;
2751
2752                 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2753                         SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2754                         SCpnt->result = CHECK_CONDITION << 1;
2755
2756                         /*
2757                          * Debug stuff
2758                          */
2759 #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
2760                         print_command (SCpnt->cmnd);
2761                         print_sense("bh", SCpnt);
2762 #endif
2763
2764                         break;
2765
2766                 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2767                         SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2768                         SCpnt->result = DID_NO_CONNECT << 16;
2769                         print_command (SCpnt->cmnd);
2770                         break;
2771
2772                 case SBP2_SCSI_STATUS_CONDITION_MET:
2773                 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2774                 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2775                         SBP2_ERR("Bad SCSI status = %x", scsi_status);
2776                         SCpnt->result = DID_ERROR << 16;
2777                         print_command (SCpnt->cmnd);
2778                         break;
2779
2780                 default:
2781                         SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2782                         SCpnt->result = DID_ERROR << 16;
2783         }
2784
2785         /*
2786          * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2787          */
2788         if (SCpnt->result == DID_OK) {
2789                 sbp2_check_sbp2_response(scsi_id, SCpnt);
2790         }
2791
2792         /*
2793          * If a bus reset is in progress and there was an error, complete
2794          * the command as busy so that it will get retried.
2795          */
2796         if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2797                 SBP2_ERR("Completing command with busy (bus reset)");
2798                 SCpnt->result = DID_BUS_BUSY << 16;
2799         }
2800
2801         /*
2802          * If a unit attention occurs, return busy status so it gets
2803          * retried... it could have happened because of a 1394 bus reset
2804          * or hot-plug...
2805          */
2806 #if 0
2807         if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
2808             (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
2809                 SBP2_DEBUG("UNIT ATTENTION - return busy");
2810                 SCpnt->result = DID_BUS_BUSY << 16;
2811         }
2812 #endif
2813
2814         /*
2815          * Tell scsi stack that we're done with this command
2816          */
2817         spin_lock_irqsave(&io_request_lock, flags);
2818         done (SCpnt);
2819         spin_unlock_irqrestore(&io_request_lock, flags);
2820
2821         return;
2822 }
2823
2824 /*
2825  * Called by scsi stack when something has really gone wrong.  Usually
2826  * called when a command has timed-out for some reason.
2827  */
2828 static int sbp2scsi_abort (Scsi_Cmnd *SCpnt)
2829 {
2830         struct sbp2scsi_host_info *hi = hpsb_get_hostinfo_bykey(&sbp2_highlevel,
2831                                                 (unsigned long)SCpnt->device->host->hostt);
2832         struct scsi_id_instance_data *scsi_id = hi->scsi_id[SCpnt->target];
2833         struct sbp2_command_info *command;
2834         unsigned long flags;
2835
2836         SBP2_ERR("aborting sbp2 command");
2837         print_command (SCpnt->cmnd);
2838
2839         if (scsi_id) {
2840
2841                 /*
2842                  * Right now, just return any matching command structures
2843                  * to the free pool.
2844                  */
2845                 spin_lock_irqsave(&hi->sbp2_command_lock, flags);
2846                 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2847                 if (command) {
2848                         SBP2_DEBUG("Found command to abort");
2849                         pci_dma_sync_single(hi->host->pdev,
2850                                             command->command_orb_dma,
2851                                             sizeof(struct sbp2_command_orb),
2852                                             PCI_DMA_BIDIRECTIONAL);
2853                         pci_dma_sync_single(hi->host->pdev,
2854                                             command->sge_dma,
2855                                             sizeof(command->scatter_gather_element),
2856                                             PCI_DMA_BIDIRECTIONAL);
2857                         sbp2util_mark_command_completed(scsi_id, command);
2858                         if (command->Current_SCpnt) {
2859                                 void (*done)(Scsi_Cmnd *) = command->Current_done;
2860                                 command->Current_SCpnt->result = DID_ABORT << 16;
2861                                 done (command->Current_SCpnt);
2862                         }
2863                 }
2864
2865                 /*
2866                  * Initiate a fetch agent reset.
2867                  */
2868                 sbp2_agent_reset(scsi_id, 0);
2869                 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2870                 spin_unlock_irqrestore(&hi->sbp2_command_lock, flags);
2871         }
2872
2873         return(SUCCESS);
2874 }
2875
2876 /*
2877  * Called by scsi stack when something has really gone wrong.
2878  */
2879 static int sbp2scsi_reset (Scsi_Cmnd *SCpnt)
2880 {
2881         struct sbp2scsi_host_info *hi = hpsb_get_hostinfo_bykey(&sbp2_highlevel,
2882                                                 (unsigned long)SCpnt->device->host->hostt);
2883         struct scsi_id_instance_data *scsi_id = hi->scsi_id[SCpnt->device->id];
2884
2885         SBP2_ERR("reset requested");
2886
2887         if (scsi_id) {
2888                 SBP2_ERR("Generating sbp2 fetch agent reset");
2889                 sbp2_agent_reset(scsi_id, 0);
2890         }
2891
2892         return(SUCCESS);
2893 }
2894
2895 static const char *sbp2scsi_info (struct Scsi_Host *host)
2896 {
2897         return "SCSI emulation for IEEE-1394 SBP-2 Devices";
2898 }
2899
2900 /* Called for contents of procfs */
2901 #define SPRINTF(args...) \
2902         do { if (pos < buffer+length) pos += sprintf(pos, ## args); } while (0)
2903
2904 static int sbp2scsi_proc_info(char *buffer, char **start, off_t offset,
2905                               int length, int hostno, int inout)
2906 {
2907         Scsi_Device *scd;
2908         struct Scsi_Host *scsi_host;
2909         struct hpsb_host *host;
2910         char *pos = buffer;
2911
2912         /* if someone is sending us data, just throw it away */
2913         if (inout)
2914                 return length;
2915
2916         for (scsi_host = scsi_hostlist; scsi_host; scsi_host = scsi_host->next)
2917                 if (scsi_host->host_no == hostno)
2918                         break;
2919
2920         if (!scsi_host)  /* if we couldn't find it, we return an error */
2921                 return -ESRCH;
2922
2923         host = hpsb_get_host_bykey(&sbp2_highlevel, (unsigned long)scsi_host->hostt);
2924         if (!host) /* shouldn't happen, but... */
2925                 return -ESRCH;
2926
2927         SPRINTF("Host scsi%d             : SBP-2 IEEE-1394 (%s)\n", hostno,
2928                 host->driver->name);
2929
2930         SPRINTF("\nModule options         :\n");
2931         SPRINTF("  max_speed            : %s\n", hpsb_speedto_str[sbp2_max_speed]);
2932         SPRINTF("  max_sectors          : %d\n", sbp2_max_sectors);
2933         SPRINTF("  serialize_io         : %s\n", sbp2_serialize_io ? "yes" : "no");
2934         SPRINTF("  exclusive_login      : %s\n", sbp2_exclusive_login ? "yes" : "no");
2935
2936         SPRINTF("\nAttached devices       : %s\n", scsi_host->host_queue ? "" : "none");
2937
2938         for (scd = scsi_host->host_queue; scd; scd = scd->next) {
2939                 int i;
2940
2941                 SPRINTF("  [Channel: %02d, Id: %02d, Lun: %02d]  ", scd->channel,
2942                         scd->id, scd->lun);
2943                 SPRINTF("%s ", (scd->type < MAX_SCSI_DEVICE_CODE) ?
2944                         scsi_device_types[(short) scd->type] : "Unknown device");
2945
2946                 for (i = 0; (i < 8) && (scd->vendor[i] >= 0x20); i++)
2947                         SPRINTF("%c", scd->vendor[i]);
2948
2949                 SPRINTF(" ");
2950
2951                 for (i = 0; (i < 16) && (scd->model[i] >= 0x20); i++)
2952                         SPRINTF("%c", scd->model[i]);
2953
2954                 SPRINTF("\n");
2955         }
2956
2957         SPRINTF("\n");
2958
2959         /* Calculate start of next buffer, and return value. */
2960         *start = buffer + offset;
2961
2962         if ((pos - buffer) < offset)
2963                 return (0);
2964         else if ((pos - buffer - offset) < length)
2965                 return (pos - buffer - offset);
2966         else
2967                 return (length);
2968 }
2969
2970
2971 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2972 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2973 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2974 MODULE_LICENSE("GPL");
2975
2976 /* SCSI host template */
2977 static Scsi_Host_Template scsi_driver_template = {
2978         .module =                       THIS_MODULE,
2979         .name =                         "SBP-2 IEEE-1394",
2980         .proc_name =                    NULL, // Filled in per-host
2981         .info =                         sbp2scsi_info,
2982         .proc_info =                    sbp2scsi_proc_info,
2983         .detect =                       sbp2scsi_detect,
2984         .queuecommand =                 sbp2scsi_queuecommand,
2985         .eh_abort_handler =             sbp2scsi_abort,
2986         .eh_device_reset_handler =      sbp2scsi_reset,
2987         .eh_bus_reset_handler =         sbp2scsi_reset,
2988         .eh_host_reset_handler =        sbp2scsi_reset,
2989         .use_new_eh_code =              1,
2990         .this_id =                      -1,
2991         .sg_tablesize =                 SG_ALL,
2992         .use_clustering =               ENABLE_CLUSTERING,
2993         .cmd_per_lun =                  SBP2_MAX_CMDS_PER_LUN,
2994         .can_queue =                    SBP2_MAX_SCSI_QUEUE,
2995         .emulated =                     1,
2996         .highmem_io =                   1,
2997 };
2998
2999 static int sbp2_module_init(void)
3000 {
3001         SBP2_DEBUG("sbp2_module_init");
3002
3003         printk(KERN_INFO "sbp2: %s\n", version);
3004
3005         /* Module load debug option to force one command at a time (serializing I/O) */
3006         if (sbp2_serialize_io) {
3007                 SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)");
3008                 scsi_driver_template.can_queue = 1;
3009                 scsi_driver_template.cmd_per_lun = 1;
3010         }
3011
3012         /* Set max sectors (module load option). Default is 255 sectors. */
3013         scsi_driver_template.max_sectors = sbp2_max_sectors;
3014
3015
3016         /* Register our high level driver with 1394 stack */
3017         hpsb_register_highlevel(&sbp2_highlevel);
3018
3019         /* Register our sbp2 status address space... */
3020         hpsb_register_addrspace(&sbp2_highlevel, &sbp2_ops, SBP2_STATUS_FIFO_ADDRESS,
3021                                 SBP2_STATUS_FIFO_ADDRESS +
3022                                 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2SCSI_MAX_SCSI_IDS+1));
3023
3024         /* Handle data movement if physical dma is not enabled/supported
3025          * on host controller */
3026 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
3027         hpsb_register_addrspace(&sbp2_highlevel, &sbp2_physdma_ops, 0x0ULL, 0xfffffffcULL);
3028 #endif
3029
3030         hpsb_register_protocol(&sbp2_driver);
3031
3032         return 0;
3033 }
3034
3035 static void __exit sbp2_module_exit(void)
3036 {
3037         SBP2_DEBUG("sbp2_module_exit");
3038
3039         hpsb_unregister_protocol(&sbp2_driver);
3040
3041         hpsb_unregister_highlevel(&sbp2_highlevel);
3042 }
3043
3044 module_init(sbp2_module_init);
3045 module_exit(sbp2_module_exit);