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  * You may access any attached SBP-2 storage devices as if they were SCSI
  33  * devices (e.g. mount /dev/sda1,  fdisk, mkfs, etc.).
  34  *
  35  * Current Issues:
  36  *
  37  *      - Error Handling: SCSI aborts and bus reset requests are handled somewhat
  38  *        but the code needs additional debugging.
  39  */
  40
  41 #include <linux/config.h>
  42 #include <linux/kernel.h>
  43 #include <linux/list.h>
  44 #include <linux/string.h>
  45 #include <linux/slab.h>
  46 #include <linux/interrupt.h>
  47 #include <linux/fs.h>
  48 #include <linux/poll.h>
  49 #include <linux/module.h>
  50 #include <linux/moduleparam.h>
  51 #include <linux/types.h>
  52 #include <linux/delay.h>
  53 #include <linux/sched.h>
  54 #include <linux/blkdev.h>
  55 #include <linux/smp_lock.h>
  56 #include <linux/init.h>
  57 #include <linux/pci.h>
  58
  59 #include <asm/current.h>
  60 #include <asm/uaccess.h>
  61 #include <asm/io.h>
  62 #include <asm/byteorder.h>
  63 #include <asm/atomic.h>
  64 #include <asm/system.h>
  65 #include <asm/scatterlist.h>
  66
  67 #include <scsi/scsi.h>
  68 #include <scsi/scsi_cmnd.h>
  69 #include <scsi/scsi_dbg.h>
  70 #include <scsi/scsi_device.h>
  71 #include <scsi/scsi_host.h>
  72
  73 #include "csr1212.h"
  74 #include "ieee1394.h"
  75 #include "ieee1394_types.h"
  76 #include "ieee1394_core.h"
  77 #include "nodemgr.h"
  78 #include "hosts.h"
  79 #include "highlevel.h"
  80 #include "ieee1394_transactions.h"
  81 #include "sbp2.h"
  82
  83 static char version[] __devinitdata =
  84         "$Rev: 1306 $ Ben Collins <bcollins@debian.org>";
  85
  86 /*
  87  * Module load parameter definitions
  88  */
  89
  90 /*
  91  * Change max_speed on module load if you have a bad IEEE-1394
  92  * controller that has trouble running 2KB packets at 400mb.
  93  *
  94  * NOTE: On certain OHCI parts I have seen short packets on async transmit
  95  * (probably due to PCI latency/throughput issues with the part). You can
  96  * bump down the speed if you are running into problems.
  97  */
  98 static int max_speed = IEEE1394_SPEED_MAX;
  99 module_param(max_speed, int, 0644);
 100 MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb default, 1 = 200mb, 0 = 100mb)");
 101
 102 /*
 103  * Set serialize_io to 1 if you'd like only one scsi command sent
 104  * down to us at a time (debugging). This might be necessary for very
 105  * badly behaved sbp2 devices.
 106  */
 107 static int serialize_io;
 108 module_param(serialize_io, int, 0444);
 109 MODULE_PARM_DESC(serialize_io, "Serialize all I/O coming down from the scsi drivers (default = 0)");
 110
 111 /*
 112  * Bump up max_sectors if you'd like to support very large sized
 113  * transfers. Please note that some older sbp2 bridge chips are broken for
 114  * transfers greater or equal to 128KB.  Default is a value of 255
 115  * sectors, or just under 128KB (at 512 byte sector size). I can note that
 116  * the Oxsemi sbp2 chipsets have no problems supporting very large
 117  * transfer sizes.
 118  */
 119 static int max_sectors = SBP2_MAX_SECTORS;
 120 module_param(max_sectors, int, 0444);
 121 MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)");
 122
 123 /*
 124  * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
 125  * do an exclusive login, as it's generally unsafe to have two hosts
 126  * talking to a single sbp2 device at the same time (filesystem coherency,
 127  * etc.). If you're running an sbp2 device that supports multiple logins,
 128  * and you're either running read-only filesystems or some sort of special
 129  * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
 130  * see opengfs.sourceforge.net for more info), then set exclusive_login
 131  * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
 132  * concurrent logins.
 133  */
 134 static int exclusive_login = 1;
 135 module_param(exclusive_login, int, 0644);
 136 MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
 137
 138 /*
 139  * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
 140  * if your sbp2 device is not properly handling the SCSI inquiry command.
 141  * This hack makes the inquiry look more like a typical MS Windows
 142  * inquiry.
 143  *
 144  * If force_inquiry_hack=1 is required for your device to work,
 145  * please submit the logged sbp2_firmware_revision value of this device to
 146  * the linux1394-devel mailing list.
 147  */
 148 static int force_inquiry_hack;
 149 module_param(force_inquiry_hack, int, 0444);
 150 MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)");
 151
 152
 153 /*
 154  * Export information about protocols/devices supported by this driver.
 155  */
 156 static struct ieee1394_device_id sbp2_id_table[] = {
 157         {
 158                 .match_flags =IEEE1394_MATCH_SPECIFIER_ID |
 159                               IEEE1394_MATCH_VERSION,
 160                 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
 161                 .version =    SBP2_SW_VERSION_ENTRY & 0xffffff
 162         },
 163         { }
 164 };
 165
 166 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
 167
 168 /*
 169  * Debug levels, configured via kernel config, or enable here.
 170  */
 171
 172 #define CONFIG_IEEE1394_SBP2_DEBUG 0
 173 /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
 174 /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
 175 /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
 176 /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
 177 /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
 178
 179 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
 180 #define SBP2_ORB_DEBUG(fmt, args...)    HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
 181 static u32 global_outstanding_command_orbs = 0;
 182 #define outstanding_orb_incr global_outstanding_command_orbs++
 183 #define outstanding_orb_decr global_outstanding_command_orbs--
 184 #else
 185 #define SBP2_ORB_DEBUG(fmt, args...)
 186 #define outstanding_orb_incr
 187 #define outstanding_orb_decr
 188 #endif
 189
 190 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
 191 #define SBP2_DMA_ALLOC(fmt, args...) \
 192         HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
 193                  ++global_outstanding_dmas, ## args)
 194 #define SBP2_DMA_FREE(fmt, args...) \
 195         HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
 196                  --global_outstanding_dmas, ## args)
 197 static u32 global_outstanding_dmas = 0;
 198 #else
 199 #define SBP2_DMA_ALLOC(fmt, args...)
 200 #define SBP2_DMA_FREE(fmt, args...)
 201 #endif
 202
 203 #if CONFIG_IEEE1394_SBP2_DEBUG >= 2
 204 #define SBP2_DEBUG(fmt, args...)        HPSB_ERR("sbp2: "fmt, ## args)
 205 #define SBP2_INFO(fmt, args...)         HPSB_ERR("sbp2: "fmt, ## args)
 206 #define SBP2_NOTICE(fmt, args...)       HPSB_ERR("sbp2: "fmt, ## args)
 207 #define SBP2_WARN(fmt, args...)         HPSB_ERR("sbp2: "fmt, ## args)
 208 #elif CONFIG_IEEE1394_SBP2_DEBUG == 1
 209 #define SBP2_DEBUG(fmt, args...)        HPSB_DEBUG("sbp2: "fmt, ## args)
 210 #define SBP2_INFO(fmt, args...)         HPSB_INFO("sbp2: "fmt, ## args)
 211 #define SBP2_NOTICE(fmt, args...)       HPSB_NOTICE("sbp2: "fmt, ## args)
 212 #define SBP2_WARN(fmt, args...)         HPSB_WARN("sbp2: "fmt, ## args)
 213 #else
 214 #define SBP2_DEBUG(fmt, args...)
 215 #define SBP2_INFO(fmt, args...)         HPSB_INFO("sbp2: "fmt, ## args)
 216 #define SBP2_NOTICE(fmt, args...)       HPSB_NOTICE("sbp2: "fmt, ## args)
 217 #define SBP2_WARN(fmt, args...)         HPSB_WARN("sbp2: "fmt, ## args)
 218 #endif
 219
 220 #define SBP2_ERR(fmt, args...)          HPSB_ERR("sbp2: "fmt, ## args)
 221
 222
 223 /*
 224  * Globals
 225  */
 226
 227 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
 228                                            u32 status);
 229
 230 static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
 231                                       u32 scsi_status, struct scsi_cmnd *SCpnt,
 232                                       void (*done)(struct scsi_cmnd *));
 233
 234 static struct scsi_host_template scsi_driver_template;
 235
 236 static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
 237
 238 static void sbp2_host_reset(struct hpsb_host *host);
 239
 240 static int sbp2_probe(struct device *dev);
 241 static int sbp2_remove(struct device *dev);
 242 static int sbp2_update(struct unit_directory *ud);
 243
 244 static struct hpsb_highlevel sbp2_highlevel = {
 245         .name =         SBP2_DEVICE_NAME,
 246         .host_reset =   sbp2_host_reset,
 247 };
 248
 249 static struct hpsb_address_ops sbp2_ops = {
 250         .write = sbp2_handle_status_write
 251 };
 252
 253 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
 254 static struct hpsb_address_ops sbp2_physdma_ops = {
 255         .read = sbp2_handle_physdma_read,
 256         .write = sbp2_handle_physdma_write,
 257 };
 258 #endif
 259
 260 static struct hpsb_protocol_driver sbp2_driver = {
 261         .name           = "SBP2 Driver",
 262         .id_table       = sbp2_id_table,
 263         .update         = sbp2_update,
 264         .driver         = {
 265                 .name           = SBP2_DEVICE_NAME,
 266                 .bus            = &ieee1394_bus_type,
 267                 .probe          = sbp2_probe,
 268                 .remove         = sbp2_remove,
 269         },
 270 };
 271
 272
 273 /* List of device firmware's that require a forced 36 byte inquiry.  */
 274 static u32 sbp2_broken_inquiry_list[] = {
 275         0x00002800,     /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */
 276                         /* DViCO Momobay CX-1 */
 277         0x00000200      /* Andreas Plesch <plesch@fas.harvard.edu> */
 278                         /* QPS Fire DVDBurner */
 279 };
 280
 281 #define NUM_BROKEN_INQUIRY_DEVS \
 282         (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list))
 283
 284 /**************************************
 285  * General utility functions
 286  **************************************/
 287
 288
 289 #ifndef __BIG_ENDIAN
 290 /*
 291  * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
 292  */
 293 static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
 294 {
 295         u32 *temp = buffer;
 296
 297         for (length = (length >> 2); length--; )
 298                 temp[length] = be32_to_cpu(temp[length]);
 299
 300         return;
 301 }
 302
 303 /*
 304  * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
 305  */
 306 static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
 307 {
 308         u32 *temp = buffer;
 309
 310         for (length = (length >> 2); length--; )
 311                 temp[length] = cpu_to_be32(temp[length]);
 312
 313         return;
 314 }
 315 #else /* BIG_ENDIAN */
 316 /* Why waste the cpu cycles? */
 317 #define sbp2util_be32_to_cpu_buffer(x,y)
 318 #define sbp2util_cpu_to_be32_buffer(x,y)
 319 #endif
 320
 321 #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
 322 /*
 323  * Debug packet dump routine. Length is in bytes.
 324  */
 325 static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, u32 dump_phys_addr)
 326 {
 327         int i;
 328         unsigned char *dump = buffer;
 329
 330         if (!dump || !length || !dump_name)
 331                 return;
 332
 333         if (dump_phys_addr)
 334                 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
 335         else
 336                 printk("[%s]", dump_name);
 337         for (i = 0; i < length; i++) {
 338                 if (i > 0x3f) {
 339                         printk("\n   ...");
 340                         break;
 341                 }
 342                 if ((i & 0x3) == 0)
 343                         printk("  ");
 344                 if ((i & 0xf) == 0)
 345                         printk("\n   ");
 346                 printk("%02x ", (int) dump[i]);
 347         }
 348         printk("\n");
 349
 350         return;
 351 }
 352 #else
 353 #define sbp2util_packet_dump(w,x,y,z)
 354 #endif
 355
 356 /*
 357  * Goofy routine that basically does a down_timeout function.
 358  */
 359 static int sbp2util_down_timeout(atomic_t *done, int timeout)
 360 {
 361         int i;
 362
 363         for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
 364                 if (msleep_interruptible(100))  /* 100ms */
 365                         return(1);
 366         }
 367         return ((i > 0) ? 0:1);
 368 }
 369
 370 /* Free's an allocated packet */
 371 static void sbp2_free_packet(struct hpsb_packet *packet)
 372 {
 373         hpsb_free_tlabel(packet);
 374         hpsb_free_packet(packet);
 375 }
 376
 377 /* This is much like hpsb_node_write(), except it ignores the response
 378  * subaction and returns immediately. Can be used from interrupts.
 379  */
 380 static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
 381                                 quadlet_t *buffer, size_t length)
 382 {
 383         struct hpsb_packet *packet;
 384
 385         packet = hpsb_make_writepacket(ne->host, ne->nodeid,
 386                                        addr, buffer, length);
 387         if (!packet)
 388                 return -ENOMEM;
 389
 390         hpsb_set_packet_complete_task(packet, (void (*)(void*))sbp2_free_packet,
 391                                       packet);
 392
 393         hpsb_node_fill_packet(ne, packet);
 394
 395         if (hpsb_send_packet(packet) < 0) {
 396                 sbp2_free_packet(packet);
 397                 return -EIO;
 398         }
 399
 400         return 0;
 401 }
 402
 403 /*
 404  * This function is called to create a pool of command orbs used for
 405  * command processing. It is called when a new sbp2 device is detected.
 406  */
 407 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
 408 {
 409         struct sbp2scsi_host_info *hi = scsi_id->hi;
 410         int i;
 411         unsigned long flags, orbs;
 412         struct sbp2_command_info *command;
 413
 414         orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
 415
 416         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 417         for (i = 0; i < orbs; i++) {
 418                 command = (struct sbp2_command_info *)
 419                     kmalloc(sizeof(struct sbp2_command_info), GFP_ATOMIC);
 420                 if (!command) {
 421                         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 422                         return(-ENOMEM);
 423                 }
 424                 memset(command, '\0', sizeof(struct sbp2_command_info));
 425                 command->command_orb_dma =
 426                         pci_map_single (hi->host->pdev, &command->command_orb,
 427                                         sizeof(struct sbp2_command_orb),
 428                                         PCI_DMA_BIDIRECTIONAL);
 429                 SBP2_DMA_ALLOC("single command orb DMA");
 430                 command->sge_dma =
 431                         pci_map_single (hi->host->pdev, &command->scatter_gather_element,
 432                                         sizeof(command->scatter_gather_element),
 433                                         PCI_DMA_BIDIRECTIONAL);
 434                 SBP2_DMA_ALLOC("scatter_gather_element");
 435                 INIT_LIST_HEAD(&command->list);
 436                 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
 437         }
 438         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 439         return 0;
 440 }
 441
 442 /*
 443  * This function is called to delete a pool of command orbs.
 444  */
 445 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
 446 {
 447         struct hpsb_host *host = scsi_id->hi->host;
 448         struct list_head *lh, *next;
 449         struct sbp2_command_info *command;
 450         unsigned long flags;
 451
 452         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 453         if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
 454                 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
 455                         command = list_entry(lh, struct sbp2_command_info, list);
 456
 457                         /* Release our generic DMA's */
 458                         pci_unmap_single(host->pdev, command->command_orb_dma,
 459                                          sizeof(struct sbp2_command_orb),
 460                                          PCI_DMA_BIDIRECTIONAL);
 461                         SBP2_DMA_FREE("single command orb DMA");
 462                         pci_unmap_single(host->pdev, command->sge_dma,
 463                                          sizeof(command->scatter_gather_element),
 464                                          PCI_DMA_BIDIRECTIONAL);
 465                         SBP2_DMA_FREE("scatter_gather_element");
 466
 467                         kfree(command);
 468                 }
 469         }
 470         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 471         return;
 472 }
 473
 474 /*
 475  * This function finds the sbp2_command for a given outstanding command
 476  * orb.Only looks at the inuse list.
 477  */
 478 static struct sbp2_command_info *sbp2util_find_command_for_orb(
 479                 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
 480 {
 481         struct sbp2_command_info *command;
 482         unsigned long flags;
 483
 484         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 485         if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
 486                 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
 487                         if (command->command_orb_dma == orb) {
 488                                 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 489                                 return (command);
 490                         }
 491                 }
 492         }
 493         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 494
 495         SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
 496
 497         return(NULL);
 498 }
 499
 500 /*
 501  * This function finds the sbp2_command for a given outstanding SCpnt.
 502  * Only looks at the inuse list.
 503  */
 504 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt)
 505 {
 506         struct sbp2_command_info *command;
 507         unsigned long flags;
 508
 509         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 510         if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
 511                 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
 512                         if (command->Current_SCpnt == SCpnt) {
 513                                 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 514                                 return (command);
 515                         }
 516                 }
 517         }
 518         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 519         return(NULL);
 520 }
 521
 522 /*
 523  * This function allocates a command orb used to send a scsi command.
 524  */
 525 static struct sbp2_command_info *sbp2util_allocate_command_orb(
 526                 struct scsi_id_instance_data *scsi_id,
 527                 struct scsi_cmnd *Current_SCpnt,
 528                 void (*Current_done)(struct scsi_cmnd *))
 529 {
 530         struct list_head *lh;
 531         struct sbp2_command_info *command = NULL;
 532         unsigned long flags;
 533
 534         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 535         if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
 536                 lh = scsi_id->sbp2_command_orb_completed.next;
 537                 list_del(lh);
 538                 command = list_entry(lh, struct sbp2_command_info, list);
 539                 command->Current_done = Current_done;
 540                 command->Current_SCpnt = Current_SCpnt;
 541                 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
 542         } else {
 543                 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
 544         }
 545         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 546         return (command);
 547 }
 548
 549 /* Free our DMA's */
 550 static void sbp2util_free_command_dma(struct sbp2_command_info *command)
 551 {
 552         struct scsi_id_instance_data *scsi_id =
 553                 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
 554         struct hpsb_host *host;
 555
 556         if (!scsi_id) {
 557                 printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__);
 558                 return;
 559         }
 560
 561         host = scsi_id->ud->ne->host;
 562
 563         if (command->cmd_dma) {
 564                 if (command->dma_type == CMD_DMA_SINGLE) {
 565                         pci_unmap_single(host->pdev, command->cmd_dma,
 566                                          command->dma_size, command->dma_dir);
 567                         SBP2_DMA_FREE("single bulk");
 568                 } else if (command->dma_type == CMD_DMA_PAGE) {
 569                         pci_unmap_page(host->pdev, command->cmd_dma,
 570                                        command->dma_size, command->dma_dir);
 571                         SBP2_DMA_FREE("single page");
 572                 } /* XXX: Check for CMD_DMA_NONE bug */
 573                 command->dma_type = CMD_DMA_NONE;
 574                 command->cmd_dma = 0;
 575         }
 576
 577         if (command->sge_buffer) {
 578                 pci_unmap_sg(host->pdev, command->sge_buffer,
 579                              command->dma_size, command->dma_dir);
 580                 SBP2_DMA_FREE("scatter list");
 581                 command->sge_buffer = NULL;
 582         }
 583 }
 584
 585 /*
 586  * This function moves a command to the completed orb list.
 587  */
 588 static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command)
 589 {
 590         unsigned long flags;
 591
 592         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
 593         list_del(&command->list);
 594         sbp2util_free_command_dma(command);
 595         list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
 596         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
 597 }
 598
 599 /*
 600  * Is scsi_id valid? Is the 1394 node still present?
 601  */
 602 static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id)
 603 {
 604         return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo;
 605 }
 606
 607 \f
 608
 609 /*********************************************
 610  * IEEE-1394 core driver stack related section
 611  *********************************************/
 612 static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
 613
 614 static int sbp2_probe(struct device *dev)
 615 {
 616         struct unit_directory *ud;
 617         struct scsi_id_instance_data *scsi_id;
 618
 619         SBP2_DEBUG("sbp2_probe");
 620
 621         ud = container_of(dev, struct unit_directory, device);
 622
 623         /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
 624          * instead. */
 625         if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
 626                 return -ENODEV;
 627
 628         scsi_id = sbp2_alloc_device(ud);
 629
 630         if (!scsi_id)
 631                 return -ENOMEM;
 632
 633         sbp2_parse_unit_directory(scsi_id, ud);
 634
 635         return sbp2_start_device(scsi_id);
 636 }
 637
 638 static int sbp2_remove(struct device *dev)
 639 {
 640         struct unit_directory *ud;
 641         struct scsi_id_instance_data *scsi_id;
 642         struct scsi_device *sdev;
 643
 644         SBP2_DEBUG("sbp2_remove");
 645
 646         ud = container_of(dev, struct unit_directory, device);
 647         scsi_id = ud->device.driver_data;
 648         if (!scsi_id)
 649                 return 0;
 650
 651         /* Trigger shutdown functions in scsi's highlevel. */
 652         if (scsi_id->scsi_host)
 653                 scsi_unblock_requests(scsi_id->scsi_host);
 654         sdev = scsi_id->sdev;
 655         if (sdev) {
 656                 scsi_id->sdev = NULL;
 657                 scsi_remove_device(sdev);
 658         }
 659
 660         sbp2_logout_device(scsi_id);
 661         sbp2_remove_device(scsi_id);
 662
 663         return 0;
 664 }
 665
 666 static int sbp2_update(struct unit_directory *ud)
 667 {
 668         struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
 669
 670         SBP2_DEBUG("sbp2_update");
 671
 672         if (sbp2_reconnect_device(scsi_id)) {
 673
 674                 /*
 675                  * Ok, reconnect has failed. Perhaps we didn't
 676                  * reconnect fast enough. Try doing a regular login, but
 677                  * first do a logout just in case of any weirdness.
 678                  */
 679                 sbp2_logout_device(scsi_id);
 680
 681                 if (sbp2_login_device(scsi_id)) {
 682                         /* Login failed too, just fail, and the backend
 683                          * will call our sbp2_remove for us */
 684                         SBP2_ERR("Failed to reconnect to sbp2 device!");
 685                         return -EBUSY;
 686                 }
 687         }
 688
 689         /* Set max retries to something large on the device. */
 690         sbp2_set_busy_timeout(scsi_id);
 691
 692         /* Do a SBP-2 fetch agent reset. */
 693         sbp2_agent_reset(scsi_id, 1);
 694
 695         /* Get the max speed and packet size that we can use. */
 696         sbp2_max_speed_and_size(scsi_id);
 697
 698         /* Complete any pending commands with busy (so they get
 699          * retried) and remove them from our queue
 700          */
 701         sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
 702
 703         /* Make sure we unblock requests (since this is likely after a bus
 704          * reset). */
 705         scsi_unblock_requests(scsi_id->scsi_host);
 706
 707         return 0;
 708 }
 709
 710 /* This functions is called by the sbp2_probe, for each new device. We now
 711  * allocate one scsi host for each scsi_id (unit directory). */
 712 static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
 713 {
 714         struct sbp2scsi_host_info *hi;
 715         struct Scsi_Host *scsi_host = NULL;
 716         struct scsi_id_instance_data *scsi_id = NULL;
 717
 718         SBP2_DEBUG("sbp2_alloc_device");
 719
 720         scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL);
 721         if (!scsi_id) {
 722                 SBP2_ERR("failed to create scsi_id");
 723                 goto failed_alloc;
 724         }
 725         memset(scsi_id, 0, sizeof(*scsi_id));
 726
 727         scsi_id->ne = ud->ne;
 728         scsi_id->ud = ud;
 729         scsi_id->speed_code = IEEE1394_SPEED_100;
 730         scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
 731         atomic_set(&scsi_id->sbp2_login_complete, 0);
 732         INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
 733         INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
 734         INIT_LIST_HEAD(&scsi_id->scsi_list);
 735         spin_lock_init(&scsi_id->sbp2_command_orb_lock);
 736         scsi_id->sbp2_device_type_and_lun = SBP2_DEVICE_TYPE_LUN_UNINITIALIZED;
 737
 738         ud->device.driver_data = scsi_id;
 739
 740         hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
 741         if (!hi) {
 742                 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
 743                 if (!hi) {
 744                         SBP2_ERR("failed to allocate hostinfo");
 745                         goto failed_alloc;
 746                 }
 747                 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
 748                 hi->host = ud->ne->host;
 749                 INIT_LIST_HEAD(&hi->scsi_ids);
 750
 751                 /* Register our sbp2 status address space... */
 752                 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops,
 753                                         SBP2_STATUS_FIFO_ADDRESS,
 754                                         SBP2_STATUS_FIFO_ADDRESS +
 755                                         SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1));
 756 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
 757                 /* Handle data movement if physical dma is not
 758                  * enabled/supportedon host controller */
 759                 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops,
 760                                         0x0ULL, 0xfffffffcULL);
 761 #endif
 762         }
 763
 764         scsi_id->hi = hi;
 765
 766         list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
 767
 768         /* Register our host with the SCSI stack. */
 769         scsi_host = scsi_host_alloc(&scsi_driver_template,
 770                                     sizeof (unsigned long));
 771         if (!scsi_host) {
 772                 SBP2_ERR("failed to register scsi host");
 773                 goto failed_alloc;
 774         }
 775
 776         scsi_host->hostdata[0] = (unsigned long)scsi_id;
 777
 778         if (!scsi_add_host(scsi_host, &ud->device)) {
 779                 scsi_id->scsi_host = scsi_host;
 780                 return scsi_id;
 781         }
 782
 783         SBP2_ERR("failed to add scsi host");
 784         scsi_host_put(scsi_host);
 785
 786 failed_alloc:
 787         sbp2_remove_device(scsi_id);
 788         return NULL;
 789 }
 790
 791
 792 static void sbp2_host_reset(struct hpsb_host *host)
 793 {
 794         struct sbp2scsi_host_info *hi;
 795         struct scsi_id_instance_data *scsi_id;
 796
 797         hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
 798
 799         if (hi) {
 800                 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
 801                         scsi_block_requests(scsi_id->scsi_host);
 802         }
 803 }
 804
 805
 806 /*
 807  * This function is where we first pull the node unique ids, and then
 808  * allocate memory and register a SBP-2 device.
 809  */
 810 static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
 811 {
 812         struct sbp2scsi_host_info *hi = scsi_id->hi;
 813         int error;
 814
 815         SBP2_DEBUG("sbp2_start_device");
 816
 817         /* Login FIFO DMA */
 818         scsi_id->login_response =
 819                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_response),
 820                                      &scsi_id->login_response_dma);
 821         if (!scsi_id->login_response)
 822                 goto alloc_fail;
 823         SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
 824
 825         /* Query logins ORB DMA */
 826         scsi_id->query_logins_orb =
 827                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_orb),
 828                                      &scsi_id->query_logins_orb_dma);
 829         if (!scsi_id->query_logins_orb)
 830                 goto alloc_fail;
 831         SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
 832
 833         /* Query logins response DMA */
 834         scsi_id->query_logins_response =
 835                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_response),
 836                                      &scsi_id->query_logins_response_dma);
 837         if (!scsi_id->query_logins_response)
 838                 goto alloc_fail;
 839         SBP2_DMA_ALLOC("consistent DMA region for query logins response");
 840
 841         /* Reconnect ORB DMA */
 842         scsi_id->reconnect_orb =
 843                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_reconnect_orb),
 844                                      &scsi_id->reconnect_orb_dma);
 845         if (!scsi_id->reconnect_orb)
 846                 goto alloc_fail;
 847         SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
 848
 849         /* Logout ORB DMA */
 850         scsi_id->logout_orb =
 851                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_logout_orb),
 852                                      &scsi_id->logout_orb_dma);
 853         if (!scsi_id->logout_orb)
 854                 goto alloc_fail;
 855         SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
 856
 857         /* Login ORB DMA */
 858         scsi_id->login_orb =
 859                 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb),
 860                                      &scsi_id->login_orb_dma);
 861         if (!scsi_id->login_orb) {
 862 alloc_fail:
 863                 if (scsi_id->query_logins_response) {
 864                         pci_free_consistent(hi->host->pdev,
 865                                             sizeof(struct sbp2_query_logins_response),
 866                                             scsi_id->query_logins_response,
 867                                             scsi_id->query_logins_response_dma);
 868                         SBP2_DMA_FREE("query logins response DMA");
 869                 }
 870
 871                 if (scsi_id->query_logins_orb) {
 872                         pci_free_consistent(hi->host->pdev,
 873                                             sizeof(struct sbp2_query_logins_orb),
 874                                             scsi_id->query_logins_orb,
 875                                             scsi_id->query_logins_orb_dma);
 876                         SBP2_DMA_FREE("query logins ORB DMA");
 877                 }
 878
 879                 if (scsi_id->logout_orb) {
 880                         pci_free_consistent(hi->host->pdev,
 881                                         sizeof(struct sbp2_logout_orb),
 882                                         scsi_id->logout_orb,
 883                                         scsi_id->logout_orb_dma);
 884                         SBP2_DMA_FREE("logout ORB DMA");
 885                 }
 886
 887                 if (scsi_id->reconnect_orb) {
 888                         pci_free_consistent(hi->host->pdev,
 889                                         sizeof(struct sbp2_reconnect_orb),
 890                                         scsi_id->reconnect_orb,
 891                                         scsi_id->reconnect_orb_dma);
 892                         SBP2_DMA_FREE("reconnect ORB DMA");
 893                 }
 894
 895                 if (scsi_id->login_response) {
 896                         pci_free_consistent(hi->host->pdev,
 897                                         sizeof(struct sbp2_login_response),
 898                                         scsi_id->login_response,
 899                                         scsi_id->login_response_dma);
 900                         SBP2_DMA_FREE("login FIFO DMA");
 901                 }
 902
 903                 list_del(&scsi_id->scsi_list);
 904
 905                 kfree(scsi_id);
 906
 907                 SBP2_ERR ("Could not allocate memory for scsi_id");
 908
 909                 return -ENOMEM;
 910         }
 911         SBP2_DMA_ALLOC("consistent DMA region for login ORB");
 912
 913         SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
 914
 915         /*
 916          * Create our command orb pool
 917          */
 918         if (sbp2util_create_command_orb_pool(scsi_id)) {
 919                 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
 920                 sbp2_remove_device(scsi_id);
 921                 return -ENOMEM;
 922         }
 923
 924         /* Schedule a timeout here. The reason is that we may be so close
 925          * to a bus reset, that the device is not available for logins.
 926          * This can happen when the bus reset is caused by the host
 927          * connected to the sbp2 device being removed. That host would
 928          * have a certain amount of time to relogin before the sbp2 device
 929          * allows someone else to login instead. One second makes sense. */
 930         msleep_interruptible(1000);
 931         if (signal_pending(current)) {
 932                 SBP2_WARN("aborting sbp2_start_device due to event");
 933                 sbp2_remove_device(scsi_id);
 934                 return -EINTR;
 935         }
 936
 937         /*
 938          * Login to the sbp-2 device
 939          */
 940         if (sbp2_login_device(scsi_id)) {
 941                 /* Login failed, just remove the device. */
 942                 sbp2_remove_device(scsi_id);
 943                 return -EBUSY;
 944         }
 945
 946         /*
 947          * Set max retries to something large on the device
 948          */
 949         sbp2_set_busy_timeout(scsi_id);
 950
 951         /*
 952          * Do a SBP-2 fetch agent reset
 953          */
 954         sbp2_agent_reset(scsi_id, 1);
 955
 956         /*
 957          * Get the max speed and packet size that we can use
 958          */
 959         sbp2_max_speed_and_size(scsi_id);
 960
 961         /* Add this device to the scsi layer now */
 962         error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
 963         if (error) {
 964                 SBP2_ERR("scsi_add_device failed");
 965                 return error;
 966         }
 967
 968         return 0;
 969 }
 970
 971 /*
 972  * This function removes an sbp2 device from the sbp2scsi_host_info struct.
 973  */
 974 static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
 975 {
 976         struct sbp2scsi_host_info *hi;
 977
 978         SBP2_DEBUG("sbp2_remove_device");
 979
 980         if (!scsi_id)
 981                 return;
 982
 983         hi = scsi_id->hi;
 984
 985         /* This will remove our scsi device aswell */
 986         if (scsi_id->scsi_host) {
 987                 scsi_remove_host(scsi_id->scsi_host);
 988                 scsi_host_put(scsi_id->scsi_host);
 989         }
 990
 991         sbp2util_remove_command_orb_pool(scsi_id);
 992
 993         list_del(&scsi_id->scsi_list);
 994
 995         if (scsi_id->login_response) {
 996                 pci_free_consistent(hi->host->pdev,
 997                                     sizeof(struct sbp2_login_response),
 998                                     scsi_id->login_response,
 999                                     scsi_id->login_response_dma);
1000                 SBP2_DMA_FREE("single login FIFO");
1001         }
1002
1003         if (scsi_id->login_orb) {
1004                 pci_free_consistent(hi->host->pdev,
1005                                     sizeof(struct sbp2_login_orb),
1006                                     scsi_id->login_orb,
1007                                     scsi_id->login_orb_dma);
1008                 SBP2_DMA_FREE("single login ORB");
1009         }
1010
1011         if (scsi_id->reconnect_orb) {
1012                 pci_free_consistent(hi->host->pdev,
1013                                     sizeof(struct sbp2_reconnect_orb),
1014                                     scsi_id->reconnect_orb,
1015                                     scsi_id->reconnect_orb_dma);
1016                 SBP2_DMA_FREE("single reconnect orb");
1017         }
1018
1019         if (scsi_id->logout_orb) {
1020                 pci_free_consistent(hi->host->pdev,
1021                                     sizeof(struct sbp2_logout_orb),
1022                                     scsi_id->logout_orb,
1023                                     scsi_id->logout_orb_dma);
1024                 SBP2_DMA_FREE("single logout orb");
1025         }
1026
1027         if (scsi_id->query_logins_orb) {
1028                 pci_free_consistent(hi->host->pdev,
1029                                     sizeof(struct sbp2_query_logins_orb),
1030                                     scsi_id->query_logins_orb,
1031                                     scsi_id->query_logins_orb_dma);
1032                 SBP2_DMA_FREE("single query logins orb");
1033         }
1034
1035         if (scsi_id->query_logins_response) {
1036                 pci_free_consistent(hi->host->pdev,
1037                                     sizeof(struct sbp2_query_logins_response),
1038                                     scsi_id->query_logins_response,
1039                                     scsi_id->query_logins_response_dma);
1040                 SBP2_DMA_FREE("single query logins data");
1041         }
1042
1043         scsi_id->ud->device.driver_data = NULL;
1044
1045         SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
1046
1047         kfree(scsi_id);
1048 }
1049
1050 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1051 /*
1052  * This function deals with physical dma write requests (for adapters that do not support
1053  * physical dma in hardware). Mostly just here for debugging...
1054  */
1055 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data,
1056                                      u64 addr, size_t length, u16 flags)
1057 {
1058
1059         /*
1060          * Manually put the data in the right place.
1061          */
1062         memcpy(bus_to_virt((u32)addr), data, length);
1063         sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", (u32)addr);
1064         return(RCODE_COMPLETE);
1065 }
1066
1067 /*
1068  * This function deals with physical dma read requests (for adapters that do not support
1069  * physical dma in hardware). Mostly just here for debugging...
1070  */
1071 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data,
1072                                     u64 addr, size_t length, u16 flags)
1073 {
1074
1075         /*
1076          * Grab data from memory and send a read response.
1077          */
1078         memcpy(data, bus_to_virt((u32)addr), length);
1079         sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", (u32)addr);
1080         return(RCODE_COMPLETE);
1081 }
1082 #endif
1083
1084
1085 /**************************************
1086  * SBP-2 protocol related section
1087  **************************************/
1088
1089 /*
1090  * This function determines if we should convert scsi commands for a particular sbp2 device type
1091  */
1092 static __inline__ int sbp2_command_conversion_device_type(u8 device_type)
1093 {
1094         return (((device_type == TYPE_DISK) ||
1095                  (device_type == TYPE_RBC) ||
1096                  (device_type == TYPE_ROM)) ? 1:0);
1097 }
1098
1099 /*
1100  * This function queries the device for the maximum concurrent logins it
1101  * supports.
1102  */
1103 static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1104 {
1105         struct sbp2scsi_host_info *hi = scsi_id->hi;
1106         quadlet_t data[2];
1107         int max_logins;
1108         int active_logins;
1109
1110         SBP2_DEBUG("sbp2_query_logins");
1111
1112         scsi_id->query_logins_orb->reserved1 = 0x0;
1113         scsi_id->query_logins_orb->reserved2 = 0x0;
1114
1115         scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1116         scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1117         SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1118
1119         scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1120         scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1121         if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1122                 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1123                 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1124                            ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1125         }
1126         SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
1127
1128         scsi_id->query_logins_orb->reserved_resp_length =
1129                 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
1130         SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
1131
1132         scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1133                                                     SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1134         scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1135                                                      SBP2_STATUS_FIFO_ADDRESS_HI);
1136         SBP2_DEBUG("sbp2_query_logins: status FIFO initialized");
1137
1138         sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1139
1140         SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1141
1142         sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1143                              "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1144
1145         memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1146         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1147
1148         SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1149
1150         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1151         data[1] = scsi_id->query_logins_orb_dma;
1152         sbp2util_cpu_to_be32_buffer(data, 8);
1153
1154         atomic_set(&scsi_id->sbp2_login_complete, 0);
1155
1156         SBP2_DEBUG("sbp2_query_logins: prepared to write");
1157         hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1158         SBP2_DEBUG("sbp2_query_logins: written");
1159
1160         if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1161                 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1162                 return(-EIO);
1163         }
1164
1165         if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1166                 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1167                 return(-EIO);
1168         }
1169
1170         if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1171             STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1172             STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1173
1174                 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1175                 return(-EIO);
1176         }
1177
1178         sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1179
1180         SBP2_DEBUG("length_max_logins = %x",
1181                    (unsigned int)scsi_id->query_logins_response->length_max_logins);
1182
1183         SBP2_DEBUG("Query logins to SBP-2 device successful");
1184
1185         max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1186         SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins);
1187
1188         active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1189         SBP2_DEBUG("Number of active logins: %d", active_logins);
1190
1191         if (active_logins >= max_logins) {
1192                 return(-EIO);
1193         }
1194
1195         return 0;
1196 }
1197
1198 /*
1199  * This function is called in order to login to a particular SBP-2 device,
1200  * after a bus reset.
1201  */
1202 static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1203 {
1204         struct sbp2scsi_host_info *hi = scsi_id->hi;
1205         quadlet_t data[2];
1206
1207         SBP2_DEBUG("sbp2_login_device");
1208
1209         if (!scsi_id->login_orb) {
1210                 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
1211                 return(-EIO);
1212         }
1213
1214         if (!exclusive_login) {
1215                 if (sbp2_query_logins(scsi_id)) {
1216                         SBP2_INFO("Device does not support any more concurrent logins");
1217                         return(-EIO);
1218                 }
1219         }
1220
1221         /* Set-up login ORB, assume no password */
1222         scsi_id->login_orb->password_hi = 0;
1223         scsi_id->login_orb->password_lo = 0;
1224         SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1225
1226         scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1227         scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1228         SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1229
1230         scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1231         scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0);   /* One second reconnect time */
1232         scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login);     /* Exclusive access to device */
1233         scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1);      /* Notify us of login complete */
1234         /* Set the lun if we were able to pull it from the device's unit directory */
1235         if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1236                 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1237                 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1238                            ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1239         }
1240         SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1241
1242         scsi_id->login_orb->passwd_resp_lengths =
1243                 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1244         SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1245
1246         scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1247                                              SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1248         scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1249                                               SBP2_STATUS_FIFO_ADDRESS_HI);
1250         SBP2_DEBUG("sbp2_login_device: status FIFO initialized");
1251
1252         /*
1253          * Byte swap ORB if necessary
1254          */
1255         sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1256
1257         SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1258
1259         sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1260                              "sbp2 login orb", scsi_id->login_orb_dma);
1261
1262         /*
1263          * Initialize login response and status fifo
1264          */
1265         memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1266         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1267
1268         SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1269
1270         /*
1271          * Ok, let's write to the target's management agent register
1272          */
1273         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1274         data[1] = scsi_id->login_orb_dma;
1275         sbp2util_cpu_to_be32_buffer(data, 8);
1276
1277         atomic_set(&scsi_id->sbp2_login_complete, 0);
1278
1279         SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1280                    (unsigned int)scsi_id->sbp2_management_agent_addr);
1281         hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1282         SBP2_DEBUG("sbp2_login_device: written");
1283
1284         /*
1285          * Wait for login status (up to 20 seconds)...
1286          */
1287         if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1288                 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1289                 return(-EIO);
1290         }
1291
1292         /*
1293          * Sanity. Make sure status returned matches login orb.
1294          */
1295         if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1296                 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1297                 return(-EIO);
1298         }
1299
1300         /*
1301          * Check status
1302          */
1303         if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1304             STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1305             STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1306
1307                 SBP2_ERR("Error logging into SBP-2 device - login failed");
1308                 return(-EIO);
1309         }
1310
1311         /*
1312          * Byte swap the login response, for use when reconnecting or
1313          * logging out.
1314          */
1315         sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1316
1317         /*
1318          * Grab our command block agent address from the login response.
1319          */
1320         SBP2_DEBUG("command_block_agent_hi = %x",
1321                    (unsigned int)scsi_id->login_response->command_block_agent_hi);
1322         SBP2_DEBUG("command_block_agent_lo = %x",
1323                    (unsigned int)scsi_id->login_response->command_block_agent_lo);
1324
1325         scsi_id->sbp2_command_block_agent_addr =
1326                 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1327         scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1328         scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1329
1330         SBP2_INFO("Logged into SBP-2 device");
1331
1332         return(0);
1333
1334 }
1335
1336 /*
1337  * This function is called in order to logout from a particular SBP-2
1338  * device, usually called during driver unload.
1339  */
1340 static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1341 {
1342         struct sbp2scsi_host_info *hi = scsi_id->hi;
1343         quadlet_t data[2];
1344         int error;
1345
1346         SBP2_DEBUG("sbp2_logout_device");
1347
1348         /*
1349          * Set-up logout ORB
1350          */
1351         scsi_id->logout_orb->reserved1 = 0x0;
1352         scsi_id->logout_orb->reserved2 = 0x0;
1353         scsi_id->logout_orb->reserved3 = 0x0;
1354         scsi_id->logout_orb->reserved4 = 0x0;
1355
1356         scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1357         scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1358
1359         /* Notify us when complete */
1360         scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1361
1362         scsi_id->logout_orb->reserved5 = 0x0;
1363         scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1364                                               SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1365         scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1366                                                SBP2_STATUS_FIFO_ADDRESS_HI);
1367
1368         /*
1369          * Byte swap ORB if necessary
1370          */
1371         sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1372
1373         sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1374                              "sbp2 logout orb", scsi_id->logout_orb_dma);
1375
1376         /*
1377          * Ok, let's write to the target's management agent register
1378          */
1379         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1380         data[1] = scsi_id->logout_orb_dma;
1381         sbp2util_cpu_to_be32_buffer(data, 8);
1382
1383         atomic_set(&scsi_id->sbp2_login_complete, 0);
1384
1385         error = hpsb_node_write(scsi_id->ne,
1386                                     scsi_id->sbp2_management_agent_addr,
1387                                     data, 8);
1388         if (error)
1389                 return error;
1390
1391         /* Wait for device to logout...1 second. */
1392         if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
1393                 return -EIO;
1394
1395         SBP2_INFO("Logged out of SBP-2 device");
1396
1397         return(0);
1398
1399 }
1400
1401 /*
1402  * This function is called in order to reconnect to a particular SBP-2
1403  * device, after a bus reset.
1404  */
1405 static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1406 {
1407         struct sbp2scsi_host_info *hi = scsi_id->hi;
1408         quadlet_t data[2];
1409         int error;
1410
1411         SBP2_DEBUG("sbp2_reconnect_device");
1412
1413         /*
1414          * Set-up reconnect ORB
1415          */
1416         scsi_id->reconnect_orb->reserved1 = 0x0;
1417         scsi_id->reconnect_orb->reserved2 = 0x0;
1418         scsi_id->reconnect_orb->reserved3 = 0x0;
1419         scsi_id->reconnect_orb->reserved4 = 0x0;
1420
1421         scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1422         scsi_id->reconnect_orb->login_ID_misc |=
1423                 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1424
1425         /* Notify us when complete */
1426         scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1427
1428         scsi_id->reconnect_orb->reserved5 = 0x0;
1429         scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1430                                                  SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1431         scsi_id->reconnect_orb->status_FIFO_hi =
1432                 (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI);
1433
1434         /*
1435          * Byte swap ORB if necessary
1436          */
1437         sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1438
1439         sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1440                              "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1441
1442         /*
1443          * Initialize status fifo
1444          */
1445         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1446
1447         /*
1448          * Ok, let's write to the target's management agent register
1449          */
1450         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1451         data[1] = scsi_id->reconnect_orb_dma;
1452         sbp2util_cpu_to_be32_buffer(data, 8);
1453
1454         atomic_set(&scsi_id->sbp2_login_complete, 0);
1455
1456         error = hpsb_node_write(scsi_id->ne,
1457                                     scsi_id->sbp2_management_agent_addr,
1458                                     data, 8);
1459         if (error)
1460                 return error;
1461
1462         /*
1463          * Wait for reconnect status (up to 1 second)...
1464          */
1465         if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1466                 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1467                 return(-EIO);
1468         }
1469
1470         /*
1471          * Sanity. Make sure status returned matches reconnect orb.
1472          */
1473         if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1474                 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1475                 return(-EIO);
1476         }
1477
1478         /*
1479          * Check status
1480          */
1481         if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1482             STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1483             STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1484
1485                 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
1486                 return(-EIO);
1487         }
1488
1489         HPSB_DEBUG("Reconnected to SBP-2 device");
1490
1491         return(0);
1492
1493 }
1494
1495 /*
1496  * This function is called in order to set the busy timeout (number of
1497  * retries to attempt) on the sbp2 device.
1498  */
1499 static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1500 {
1501         quadlet_t data;
1502
1503         SBP2_DEBUG("sbp2_set_busy_timeout");
1504
1505         /*
1506          * Ok, let's write to the target's busy timeout register
1507          */
1508         data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1509
1510         if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) {
1511                 SBP2_ERR("sbp2_set_busy_timeout error");
1512         }
1513
1514         return(0);
1515 }
1516
1517
1518 /*
1519  * This function is called to parse sbp2 device's config rom unit
1520  * directory. Used to determine things like sbp2 management agent offset,
1521  * and command set used (SCSI or RBC).
1522  */
1523 static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1524                                       struct unit_directory *ud)
1525 {
1526         struct csr1212_keyval *kv;
1527         struct csr1212_dentry *dentry;
1528         u64 management_agent_addr;
1529         u32 command_set_spec_id, command_set, unit_characteristics,
1530                 firmware_revision, workarounds;
1531         int i;
1532
1533         SBP2_DEBUG("sbp2_parse_unit_directory");
1534
1535         management_agent_addr = 0x0;
1536         command_set_spec_id = 0x0;
1537         command_set = 0x0;
1538         unit_characteristics = 0x0;
1539         firmware_revision = 0x0;
1540
1541         /* Handle different fields in the unit directory, based on keys */
1542         csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1543                 switch (kv->key.id) {
1544                 case CSR1212_KV_ID_DEPENDENT_INFO:
1545                         if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
1546                                 /* Save off the management agent address */
1547                                 management_agent_addr =
1548                                         CSR1212_REGISTER_SPACE_BASE +
1549                                         (kv->value.csr_offset << 2);
1550
1551                                 SBP2_DEBUG("sbp2_management_agent_addr = %x",
1552                                            (unsigned int) management_agent_addr);
1553                         } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1554                                 scsi_id->sbp2_device_type_and_lun = kv->value.immediate;
1555                         }
1556                         break;
1557
1558                 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1559                         /* Command spec organization */
1560                         command_set_spec_id = kv->value.immediate;
1561                         SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1562                                    (unsigned int) command_set_spec_id);
1563                         break;
1564
1565                 case SBP2_COMMAND_SET_KEY:
1566                         /* Command set used by sbp2 device */
1567                         command_set = kv->value.immediate;
1568                         SBP2_DEBUG("sbp2_command_set = %x",
1569                                    (unsigned int) command_set);
1570                         break;
1571
1572                 case SBP2_UNIT_CHARACTERISTICS_KEY:
1573                         /*
1574                          * Unit characterisitcs (orb related stuff
1575                          * that I'm not yet paying attention to)
1576                          */
1577                         unit_characteristics = kv->value.immediate;
1578                         SBP2_DEBUG("sbp2_unit_characteristics = %x",
1579                                    (unsigned int) unit_characteristics);
1580                         break;
1581
1582                 case SBP2_FIRMWARE_REVISION_KEY:
1583                         /* Firmware revision */
1584                         firmware_revision = kv->value.immediate;
1585                         if (force_inquiry_hack)
1586                                 SBP2_INFO("sbp2_firmware_revision = %x",
1587                                    (unsigned int) firmware_revision);
1588                         else    SBP2_DEBUG("sbp2_firmware_revision = %x",
1589                                    (unsigned int) firmware_revision);
1590                         break;
1591
1592                 default:
1593                         break;
1594                 }
1595         }
1596
1597         /* This is the start of our broken device checking. We try to hack
1598          * around oddities and known defects.  */
1599         workarounds = 0x0;
1600
1601         /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1602          * bridge with 128KB max transfer size limitation. For sanity, we
1603          * only voice this when the current max_sectors setting
1604          * exceeds the 128k limit. By default, that is not the case.
1605          *
1606          * It would be really nice if we could detect this before the scsi
1607          * host gets initialized. That way we can down-force the
1608          * max_sectors to account for it. That is not currently
1609          * possible.  */
1610         if ((firmware_revision & 0xffff00) ==
1611                         SBP2_128KB_BROKEN_FIRMWARE &&
1612                         (max_sectors * 512) > (128*1024)) {
1613                 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.",
1614                                 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1615                 SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
1616                                 max_sectors);
1617                 workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER;
1618         }
1619
1620         /* Check for a blacklisted set of devices that require us to force
1621          * a 36 byte host inquiry. This can be overriden as a module param
1622          * (to force all hosts).  */
1623         for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) {
1624                 if ((firmware_revision & 0xffff00) ==
1625                                 sbp2_broken_inquiry_list[i]) {
1626                         SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
1627                                         NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1628                         workarounds |= SBP2_BREAKAGE_INQUIRY_HACK;
1629                         break; /* No need to continue. */
1630                 }
1631         }
1632
1633         /* If this is a logical unit directory entry, process the parent
1634          * to get the values. */
1635         if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1636                 struct unit_directory *parent_ud =
1637                         container_of(ud->device.parent, struct unit_directory, device);
1638                 sbp2_parse_unit_directory(scsi_id, parent_ud);
1639         } else {
1640                 scsi_id->sbp2_management_agent_addr = management_agent_addr;
1641                 scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1642                 scsi_id->sbp2_command_set = command_set;
1643                 scsi_id->sbp2_unit_characteristics = unit_characteristics;
1644                 scsi_id->sbp2_firmware_revision = firmware_revision;
1645                 scsi_id->workarounds = workarounds;
1646                 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1647                         scsi_id->sbp2_device_type_and_lun = ud->lun;
1648         }
1649 }
1650
1651 /*
1652  * This function is called in order to determine the max speed and packet
1653  * size we can use in our ORBs. Note, that we (the driver and host) only
1654  * initiate the transaction. The SBP-2 device actually transfers the data
1655  * (by reading from the DMA area we tell it). This means that the SBP-2
1656  * device decides the actual maximum data it can transfer. We just tell it
1657  * the speed that it needs to use, and the max_rec the host supports, and
1658  * it takes care of the rest.
1659  */
1660 static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1661 {
1662         struct sbp2scsi_host_info *hi = scsi_id->hi;
1663
1664         SBP2_DEBUG("sbp2_max_speed_and_size");
1665
1666         /* Initial setting comes from the hosts speed map */
1667         scsi_id->speed_code = hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64
1668                                                   + NODEID_TO_NODE(scsi_id->ne->nodeid)];
1669
1670         /* Bump down our speed if the user requested it */
1671         if (scsi_id->speed_code > max_speed) {
1672                 scsi_id->speed_code = max_speed;
1673                 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1674                          hpsb_speedto_str[scsi_id->speed_code]);
1675         }
1676
1677         /* Payload size is the lesser of what our speed supports and what
1678          * our host supports.  */
1679         scsi_id->max_payload_size = min(sbp2_speedto_max_payload[scsi_id->speed_code],
1680                                         (u8)(hi->host->csr.max_rec - 1));
1681
1682         HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1683                    NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1684                    hpsb_speedto_str[scsi_id->speed_code],
1685                    1 << ((u32)scsi_id->max_payload_size + 2));
1686
1687         return(0);
1688 }
1689
1690 /*
1691  * This function is called in order to perform a SBP-2 agent reset.
1692  */
1693 static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1694 {
1695         quadlet_t data;
1696         u64 addr;
1697         int retval;
1698
1699         SBP2_DEBUG("sbp2_agent_reset");
1700
1701         /*
1702          * Ok, let's write to the target's management agent register
1703          */
1704         data = ntohl(SBP2_AGENT_RESET_DATA);
1705         addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1706
1707         if (wait)
1708                 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1709         else
1710                 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1711
1712         if (retval < 0) {
1713                 SBP2_ERR("hpsb_node_write failed.\n");
1714                 return -EIO;
1715         }
1716
1717         /*
1718          * Need to make sure orb pointer is written on next command
1719          */
1720         scsi_id->last_orb = NULL;
1721
1722         return(0);
1723 }
1724
1725 /*
1726  * This function is called to create the actual command orb and s/g list
1727  * out of the scsi command itself.
1728  */
1729 static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1730                                    struct sbp2_command_info *command,
1731                                    unchar *scsi_cmd,
1732                                    unsigned int scsi_use_sg,
1733                                    unsigned int scsi_request_bufflen,
1734                                    void *scsi_request_buffer,
1735                                    enum dma_data_direction dma_dir)
1736
1737 {
1738         struct sbp2scsi_host_info *hi = scsi_id->hi;
1739         struct scatterlist *sgpnt = (struct scatterlist *) scsi_request_buffer;
1740         struct sbp2_command_orb *command_orb = &command->command_orb;
1741         struct sbp2_unrestricted_page_table *scatter_gather_element =
1742                 &command->scatter_gather_element[0];
1743         u32 sg_count, sg_len, orb_direction;
1744         dma_addr_t sg_addr;
1745         int i;
1746
1747         /*
1748          * Set-up our command ORB..
1749          *
1750          * NOTE: We're doing unrestricted page tables (s/g), as this is
1751          * best performance (at least with the devices I have). This means
1752          * that data_size becomes the number of s/g elements, and
1753          * page_size should be zero (for unrestricted).
1754          */
1755         command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1756         command_orb->next_ORB_lo = 0x0;
1757         command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1758         command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
1759         command_orb->misc |= ORB_SET_NOTIFY(1);         /* Notify us when complete */
1760
1761         /*
1762          * Get the direction of the transfer. If the direction is unknown, then use our
1763          * goofy table as a back-up.
1764          */
1765         switch (dma_dir) {
1766                 case DMA_NONE:
1767                         orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1768                         break;
1769                 case DMA_TO_DEVICE:
1770                         orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1771                         break;
1772                 case DMA_FROM_DEVICE:
1773                         orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1774                         break;
1775                 case DMA_BIDIRECTIONAL:
1776                 default:
1777                         SBP2_ERR("SCSI data transfer direction not specified. "
1778                                  "Update the SBP2 direction table in sbp2.h if "
1779                                  "necessary for your application");
1780                         __scsi_print_command(scsi_cmd);
1781                         orb_direction = sbp2scsi_direction_table[*scsi_cmd];
1782                         break;
1783         }
1784
1785         /*
1786          * Set-up our pagetable stuff... unfortunately, this has become
1787          * messier than I'd like. Need to clean this up a bit.   ;-)
1788          */
1789         if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1790
1791                 SBP2_DEBUG("No data transfer");
1792
1793                 /*
1794                  * Handle no data transfer
1795                  */
1796                 command_orb->data_descriptor_hi = 0x0;
1797                 command_orb->data_descriptor_lo = 0x0;
1798                 command_orb->misc |= ORB_SET_DIRECTION(1);
1799
1800         } else if (scsi_use_sg) {
1801
1802                 SBP2_DEBUG("Use scatter/gather");
1803
1804                 /*
1805                  * Special case if only one element (and less than 64KB in size)
1806                  */
1807                 if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1808
1809                         SBP2_DEBUG("Only one s/g element");
1810                         command->dma_dir = dma_dir;
1811                         command->dma_size = sgpnt[0].length;
1812                         command->dma_type = CMD_DMA_PAGE;
1813                         command->cmd_dma = pci_map_page(hi->host->pdev,
1814                                                         sgpnt[0].page,
1815                                                         sgpnt[0].offset,
1816                                                         command->dma_size,
1817                                                         command->dma_dir);
1818                         SBP2_DMA_ALLOC("single page scatter element");
1819
1820                         command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1821                         command_orb->data_descriptor_lo = command->cmd_dma;
1822                         command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1823                         command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1824
1825                 } else {
1826                         int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir);
1827                         SBP2_DMA_ALLOC("scatter list");
1828
1829                         command->dma_size = scsi_use_sg;
1830                         command->dma_dir = dma_dir;
1831                         command->sge_buffer = sgpnt;
1832
1833                         /* use page tables (s/g) */
1834                         command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1835                         command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1836                         command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1837                         command_orb->data_descriptor_lo = command->sge_dma;
1838
1839                         /*
1840                          * Loop through and fill out our sbp-2 page tables
1841                          * (and split up anything too large)
1842                          */
1843                         for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1844                                 sg_len = sg_dma_len(sgpnt);
1845                                 sg_addr = sg_dma_address(sgpnt);
1846                                 while (sg_len) {
1847                                         scatter_gather_element[sg_count].segment_base_lo = sg_addr;
1848                                         if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1849                                                 scatter_gather_element[sg_count].length_segment_base_hi =
1850                                                         PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1851                                                 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1852                                                 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1853                                         } else {
1854                                                 scatter_gather_element[sg_count].length_segment_base_hi =
1855                                                         PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1856                                                 sg_len = 0;
1857                                         }
1858                                         sg_count++;
1859                                 }
1860                         }
1861
1862                         /* Number of page table (s/g) elements */
1863                         command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1864
1865                         sbp2util_packet_dump(scatter_gather_element,
1866                                              (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1867                                              "sbp2 s/g list", command->sge_dma);
1868
1869                         /*
1870                          * Byte swap page tables if necessary
1871                          */
1872                         sbp2util_cpu_to_be32_buffer(scatter_gather_element,
1873                                                     (sizeof(struct sbp2_unrestricted_page_table)) *
1874                                                     sg_count);
1875
1876                 }
1877
1878         } else {
1879
1880                 SBP2_DEBUG("No scatter/gather");
1881
1882                 command->dma_dir = dma_dir;
1883                 command->dma_size = scsi_request_bufflen;
1884                 command->dma_type = CMD_DMA_SINGLE;
1885                 command->cmd_dma = pci_map_single (hi->host->pdev, scsi_request_buffer,
1886                                                    command->dma_size,
1887                                                    command->dma_dir);
1888                 SBP2_DMA_ALLOC("single bulk");
1889
1890                 /*
1891                  * Handle case where we get a command w/o s/g enabled (but
1892                  * check for transfers larger than 64K)
1893                  */
1894                 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1895
1896                         command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1897                         command_orb->data_descriptor_lo = command->cmd_dma;
1898                         command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1899                         command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1900
1901                         /*
1902                          * Sanity, in case our direction table is not
1903                          * up-to-date
1904                          */
1905                         if (!scsi_request_bufflen) {
1906                                 command_orb->data_descriptor_hi = 0x0;
1907                                 command_orb->data_descriptor_lo = 0x0;
1908                                 command_orb->misc |= ORB_SET_DIRECTION(1);
1909                         }
1910
1911                 } else {
1912                         /*
1913                          * Need to turn this into page tables, since the
1914                          * buffer is too large.
1915                          */
1916                         command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1917                         command_orb->data_descriptor_lo = command->sge_dma;
1918
1919                         /* Use page tables (s/g) */
1920                         command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1921                         command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1922
1923                         /*
1924                          * fill out our sbp-2 page tables (and split up
1925                          * the large buffer)
1926                          */
1927                         sg_count = 0;
1928                         sg_len = scsi_request_bufflen;
1929                         sg_addr = command->cmd_dma;
1930                         while (sg_len) {
1931                                 scatter_gather_element[sg_count].segment_base_lo = sg_addr;
1932                                 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1933                                         scatter_gather_element[sg_count].length_segment_base_hi =
1934                                                 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1935                                         sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1936                                         sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1937                                 } else {
1938                                         scatter_gather_element[sg_count].length_segment_base_hi =
1939                                                 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1940                                         sg_len = 0;
1941                                 }
1942                                 sg_count++;
1943                         }
1944
1945                         /* Number of page table (s/g) elements */
1946                         command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1947
1948                         sbp2util_packet_dump(scatter_gather_element,
1949                                              (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1950                                              "sbp2 s/g list", command->sge_dma);
1951
1952                         /*
1953                          * Byte swap page tables if necessary
1954                          */
1955                         sbp2util_cpu_to_be32_buffer(scatter_gather_element,
1956                                                     (sizeof(struct sbp2_unrestricted_page_table)) *
1957                                                      sg_count);
1958
1959                 }
1960
1961         }
1962
1963         /*
1964          * Byte swap command ORB if necessary
1965          */
1966         sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1967
1968         /*
1969          * Put our scsi command in the command ORB
1970          */
1971         memset(command_orb->cdb, 0, 12);
1972         memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1973
1974         return(0);
1975 }
1976
1977 /*
1978  * This function is called in order to begin a regular SBP-2 command.
1979  */
1980 static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1981                                  struct sbp2_command_info *command)
1982 {
1983         struct sbp2scsi_host_info *hi = scsi_id->hi;
1984         struct sbp2_command_orb *command_orb = &command->command_orb;
1985         struct node_entry *ne = scsi_id->ne;
1986         u64 addr;
1987
1988         outstanding_orb_incr;
1989         SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
1990                         command_orb, global_outstanding_command_orbs);
1991
1992         pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1993                                        sizeof(struct sbp2_command_orb),
1994                                        PCI_DMA_BIDIRECTIONAL);
1995         pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1996                                        sizeof(command->scatter_gather_element),
1997                                        PCI_DMA_BIDIRECTIONAL);
1998         /*
1999          * Check to see if there are any previous orbs to use
2000          */
2001         if (scsi_id->last_orb == NULL) {
2002                 quadlet_t data[2];
2003
2004                 /*
2005                  * Ok, let's write to the target's management agent register
2006                  */
2007                 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
2008                 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
2009                 data[1] = command->command_orb_dma;
2010                 sbp2util_cpu_to_be32_buffer(data, 8);
2011
2012                 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
2013
2014                 if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
2015                         SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
2016                         return -EIO;
2017                 }
2018
2019                 SBP2_ORB_DEBUG("write command agent complete");
2020
2021                 scsi_id->last_orb = command_orb;
2022                 scsi_id->last_orb_dma = command->command_orb_dma;
2023
2024         } else {
2025                 quadlet_t data;
2026
2027                 /*
2028                  * We have an orb already sent (maybe or maybe not
2029                  * processed) that we can append this orb to. So do so,
2030                  * and ring the doorbell. Have to be very careful
2031                  * modifying these next orb pointers, as they are accessed
2032                  * both by the sbp2 device and us.
2033                  */
2034                 scsi_id->last_orb->next_ORB_lo =
2035                         cpu_to_be32(command->command_orb_dma);
2036                 /* Tells hardware that this pointer is valid */
2037                 scsi_id->last_orb->next_ORB_hi = 0x0;
2038                 pci_dma_sync_single_for_device(hi->host->pdev, scsi_id->last_orb_dma,
2039                                                sizeof(struct sbp2_command_orb),
2040                                                PCI_DMA_BIDIRECTIONAL);
2041
2042                 /*
2043                  * Ring the doorbell
2044                  */
2045                 data = cpu_to_be32(command->command_orb_dma);
2046                 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
2047
2048                 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
2049
2050                 if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
2051                         SBP2_ERR("sbp2util_node_write_no_wait failed");
2052                         return(-EIO);
2053                 }
2054
2055                 scsi_id->last_orb = command_orb;
2056                 scsi_id->last_orb_dma = command->command_orb_dma;
2057
2058         }
2059         return(0);
2060 }
2061
2062 /*
2063  * This function is called in order to begin a regular SBP-2 command.
2064  */
2065 static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2066                              struct scsi_cmnd *SCpnt,
2067                              void (*done)(struct scsi_cmnd *))
2068 {
2069         unchar *cmd = (unchar *) SCpnt->cmnd;
2070         unsigned int request_bufflen = SCpnt->request_bufflen;
2071         struct sbp2_command_info *command;
2072
2073         SBP2_DEBUG("sbp2_send_command");
2074 #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2075         printk("[scsi command]\n   ");
2076         scsi_print_command(SCpnt);
2077 #endif
2078         SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2079         SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2080
2081         /*
2082          * Allocate a command orb and s/g structure
2083          */
2084         command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2085         if (!command) {
2086                 return(-EIO);
2087         }
2088
2089         /*
2090          * The scsi stack sends down a request_bufflen which does not match the
2091          * length field in the scsi cdb. This causes some sbp2 devices to
2092          * reject this inquiry command. Fix the request_bufflen.
2093          */
2094         if (*cmd == INQUIRY) {
2095                 if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK)
2096                         request_bufflen = cmd[4] = 0x24;
2097                 else
2098                         request_bufflen = cmd[4];
2099         }
2100
2101         /*
2102          * Now actually fill in the comamnd orb and sbp2 s/g list
2103          */
2104         sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2105                                 request_bufflen, SCpnt->request_buffer,
2106                                 SCpnt->sc_data_direction);
2107         /*
2108          * Update our cdb if necessary (to handle sbp2 RBC command set
2109          * differences). This is where the command set hacks go!   =)
2110          */
2111         sbp2_check_sbp2_command(scsi_id, command->command_orb.cdb);
2112
2113         sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2114                              "sbp2 command orb", command->command_orb_dma);
2115
2116         /*
2117          * Initialize status fifo
2118          */
2119         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2120
2121         /*
2122          * Link up the orb, and ring the doorbell if needed
2123          */
2124         sbp2_link_orb_command(scsi_id, command);
2125
2126         return(0);
2127 }
2128
2129
2130 /*
2131  * This function deals with command set differences between Linux scsi
2132  * command set and sbp2 RBC command set.
2133  */
2134 static void sbp2_check_sbp2_command(struct scsi_id_instance_data *scsi_id, unchar *cmd)
2135 {
2136         unchar new_cmd[16];
2137         u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
2138
2139         SBP2_DEBUG("sbp2_check_sbp2_command");
2140
2141         switch (*cmd) {
2142
2143                 case READ_6:
2144
2145                         if (sbp2_command_conversion_device_type(device_type)) {
2146
2147                                 SBP2_DEBUG("Convert READ_6 to READ_10");
2148
2149                                 /*
2150                                  * Need to turn read_6 into read_10
2151                                  */
2152                                 new_cmd[0] = 0x28;
2153                                 new_cmd[1] = (cmd[1] & 0xe0);
2154                                 new_cmd[2] = 0x0;
2155                                 new_cmd[3] = (cmd[1] & 0x1f);
2156                                 new_cmd[4] = cmd[2];
2157                                 new_cmd[5] = cmd[3];
2158                                 new_cmd[6] = 0x0;
2159                                 new_cmd[7] = 0x0;
2160                                 new_cmd[8] = cmd[4];
2161                                 new_cmd[9] = cmd[5];
2162
2163                                 memcpy(cmd, new_cmd, 10);
2164
2165                         }
2166
2167                         break;
2168
2169                 case WRITE_6:
2170
2171                         if (sbp2_command_conversion_device_type(device_type)) {
2172
2173                                 SBP2_DEBUG("Convert WRITE_6 to WRITE_10");
2174
2175                                 /*
2176                                  * Need to turn write_6 into write_10
2177                                  */
2178                                 new_cmd[0] = 0x2a;
2179                                 new_cmd[1] = (cmd[1] & 0xe0);
2180                                 new_cmd[2] = 0x0;
2181                                 new_cmd[3] = (cmd[1] & 0x1f);
2182                                 new_cmd[4] = cmd[2];
2183                                 new_cmd[5] = cmd[3];
2184                                 new_cmd[6] = 0x0;
2185                                 new_cmd[7] = 0x0;
2186                                 new_cmd[8] = cmd[4];
2187                                 new_cmd[9] = cmd[5];
2188
2189                                 memcpy(cmd, new_cmd, 10);
2190
2191                         }
2192
2193                         break;
2194
2195                 case MODE_SENSE:
2196
2197                         if (sbp2_command_conversion_device_type(device_type)) {
2198
2199                                 SBP2_DEBUG("Convert MODE_SENSE_6 to MODE_SENSE_10");
2200
2201                                 /*
2202                                  * Need to turn mode_sense_6 into mode_sense_10
2203                                  */
2204                                 new_cmd[0] = 0x5a;
2205                                 new_cmd[1] = cmd[1];
2206                                 new_cmd[2] = cmd[2];
2207                                 new_cmd[3] = 0x0;
2208                                 new_cmd[4] = 0x0;
2209                                 new_cmd[5] = 0x0;
2210                                 new_cmd[6] = 0x0;
2211                                 new_cmd[7] = 0x0;
2212                                 new_cmd[8] = cmd[4];
2213                                 new_cmd[9] = cmd[5];
2214
2215                                 memcpy(cmd, new_cmd, 10);
2216
2217                         }
2218
2219                         break;
2220
2221                 case MODE_SELECT:
2222
2223                         /*
2224                          * TODO. Probably need to change mode select to 10 byte version
2225                          */
2226
2227                 default:
2228                         break;
2229         }
2230
2231         return;
2232 }
2233
2234 /*
2235  * Translates SBP-2 status into SCSI sense data for check conditions
2236  */
2237 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2238 {
2239         SBP2_DEBUG("sbp2_status_to_sense_data");
2240
2241         /*
2242          * Ok, it's pretty ugly...   ;-)
2243          */
2244         sense_data[0] = 0x70;
2245         sense_data[1] = 0x0;
2246         sense_data[2] = sbp2_status[9];
2247         sense_data[3] = sbp2_status[12];
2248         sense_data[4] = sbp2_status[13];
2249         sense_data[5] = sbp2_status[14];
2250         sense_data[6] = sbp2_status[15];
2251         sense_data[7] = 10;
2252         sense_data[8] = sbp2_status[16];
2253         sense_data[9] = sbp2_status[17];
2254         sense_data[10] = sbp2_status[18];
2255         sense_data[11] = sbp2_status[19];
2256         sense_data[12] = sbp2_status[10];
2257         sense_data[13] = sbp2_status[11];
2258         sense_data[14] = sbp2_status[20];
2259         sense_data[15] = sbp2_status[21];
2260
2261         return(sbp2_status[8] & 0x3f);  /* return scsi status */
2262 }
2263
2264 /*
2265  * This function is called after a command is completed, in order to do any necessary SBP-2
2266  * response data translations for the SCSI stack
2267  */
2268 static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
2269                                      struct scsi_cmnd *SCpnt)
2270 {
2271         u8 *scsi_buf = SCpnt->request_buffer;
2272         u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
2273
2274         SBP2_DEBUG("sbp2_check_sbp2_response");
2275
2276         switch (SCpnt->cmnd[0]) {
2277
2278                 case INQUIRY:
2279
2280                         /*
2281                          * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill
2282                          * this information in from the inquiry response data. Lun is set to zero.
2283                          */
2284                         if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
2285                                 SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data");
2286                                 scsi_id->sbp2_device_type_and_lun = (scsi_buf[0] & 0x1f) << 16;
2287                         }
2288
2289                         /*
2290                          * Make sure data length is ok. Minimum length is 36 bytes
2291                          */
2292                         if (scsi_buf[4] == 0) {
2293                                 scsi_buf[4] = 36 - 5;
2294                         }
2295
2296                         /*
2297                          * Check for Simple Direct Access Device and change it to TYPE_DISK
2298                          */
2299                         if ((scsi_buf[0] & 0x1f) == TYPE_RBC) {
2300                                 SBP2_DEBUG("Changing TYPE_RBC to TYPE_DISK");
2301                                 scsi_buf[0] &= 0xe0;
2302                         }
2303
2304                         /*
2305                          * Fix ansi revision and response data format
2306                          */
2307                         scsi_buf[2] |= 2;
2308                         scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
2309
2310                         break;
2311
2312                 case MODE_SENSE:
2313
2314                         if (sbp2_command_conversion_device_type(device_type)) {
2315
2316                                 SBP2_DEBUG("Modify mode sense response (10 byte version)");
2317
2318                                 scsi_buf[0] = scsi_buf[1];      /* Mode data length */
2319                                 scsi_buf[1] = scsi_buf[2];      /* Medium type */
2320                                 scsi_buf[2] = scsi_buf[3];      /* Device specific parameter */
2321                                 scsi_buf[3] = scsi_buf[7];      /* Block descriptor length */
2322                                 memcpy(scsi_buf + 4, scsi_buf + 8, scsi_buf[0]);
2323                         }
2324
2325                         break;
2326
2327                 case MODE_SELECT:
2328
2329                         /*
2330                          * TODO. Probably need to change mode select to 10 byte version
2331                          */
2332
2333                 default:
2334                         break;
2335         }
2336         return;
2337 }
2338
2339 /*
2340  * This function deals with status writes from the SBP-2 device
2341  */
2342 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2343                                     quadlet_t *data, u64 addr, size_t length, u16 fl)
2344 {
2345         struct sbp2scsi_host_info *hi;
2346         struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
2347         u32 id;
2348         struct scsi_cmnd *SCpnt = NULL;
2349         u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2350         struct sbp2_command_info *command;
2351
2352         SBP2_DEBUG("sbp2_handle_status_write");
2353
2354         sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2355
2356         if (!host) {
2357                 SBP2_ERR("host is NULL - this is bad!");
2358                 return(RCODE_ADDRESS_ERROR);
2359         }
2360
2361         hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2362
2363         if (!hi) {
2364                 SBP2_ERR("host info is NULL - this is bad!");
2365                 return(RCODE_ADDRESS_ERROR);
2366         }
2367
2368         /*
2369          * Find our scsi_id structure by looking at the status fifo address written to by
2370          * the sbp2 device.
2371          */
2372         id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS));
2373         list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
2374                 if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) {
2375                         scsi_id = scsi_id_tmp;
2376                         break;
2377                 }
2378         }
2379
2380         if (!scsi_id) {
2381                 SBP2_ERR("scsi_id is NULL - device is gone?");
2382                 return(RCODE_ADDRESS_ERROR);
2383         }
2384
2385         /*
2386          * Put response into scsi_id status fifo...
2387          */
2388         memcpy(&scsi_id->status_block, data, length);
2389
2390         /*
2391          * Byte swap first two quadlets (8 bytes) of status for processing
2392          */
2393         sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2394
2395         /*
2396          * Handle command ORB status here if necessary. First, need to match status with command.
2397          */
2398         command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2399         if (command) {
2400
2401                 SBP2_DEBUG("Found status for command ORB");
2402                 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2403                                             sizeof(struct sbp2_command_orb),
2404                                             PCI_DMA_BIDIRECTIONAL);
2405                 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2406                                             sizeof(command->scatter_gather_element),
2407                                             PCI_DMA_BIDIRECTIONAL);
2408
2409                 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2410                 outstanding_orb_decr;
2411
2412                 /*
2413                  * Matched status with command, now grab scsi command pointers and check status
2414                  */
2415                 SCpnt = command->Current_SCpnt;
2416                 sbp2util_mark_command_completed(scsi_id, command);
2417
2418                 if (SCpnt) {
2419
2420                         /*
2421                          * See if the target stored any scsi status information
2422                          */
2423                         if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2424                                 /*
2425                                  * Translate SBP-2 status to SCSI sense data
2426                                  */
2427                                 SBP2_DEBUG("CHECK CONDITION");
2428                                 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2429                         }
2430
2431                         /*
2432                          * Check to see if the dead bit is set. If so, we'll have to initiate
2433                          * a fetch agent reset.
2434                          */
2435                         if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2436
2437                                 /*
2438                                  * Initiate a fetch agent reset.
2439                                  */
2440                                 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2441                                 sbp2_agent_reset(scsi_id, 0);
2442                         }
2443
2444                         SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2445                 }
2446
2447                 /*
2448                  * Check here to see if there are no commands in-use. If there are none, we can
2449                  * null out last orb so that next time around we write directly to the orb pointer...
2450                  * Quick start saves one 1394 bus transaction.
2451                  */
2452                 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2453                         scsi_id->last_orb = NULL;
2454                 }
2455
2456         } else {
2457
2458                 /*
2459                  * It's probably a login/logout/reconnect status.
2460                  */
2461                 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2462                     (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2463                     (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2464                     (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2465                         atomic_set(&scsi_id->sbp2_login_complete, 1);
2466                 }
2467         }
2468
2469         if (SCpnt) {
2470
2471                 /* Complete the SCSI command. */
2472                 SBP2_DEBUG("Completing SCSI command");
2473                 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2474                                           command->Current_done);
2475                 SBP2_ORB_DEBUG("command orb completed");
2476         }
2477
2478         return(RCODE_COMPLETE);
2479 }
2480
2481
2482 /**************************************
2483  * SCSI interface related section
2484  **************************************/
2485
2486 /*
2487  * This routine is the main request entry routine for doing I/O. It is
2488  * called from the scsi stack directly.
2489  */
2490 static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
2491                                  void (*done)(struct scsi_cmnd *))
2492 {
2493         struct scsi_id_instance_data *scsi_id =
2494                 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2495         struct sbp2scsi_host_info *hi;
2496         int result = DID_NO_CONNECT << 16;
2497
2498         SBP2_DEBUG("sbp2scsi_queuecommand");
2499
2500         if (!sbp2util_node_is_available(scsi_id))
2501                 goto done;
2502
2503         hi = scsi_id->hi;
2504
2505         if (!hi) {
2506                 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2507                 goto done;
2508         }
2509
2510         /*
2511          * Until we handle multiple luns, just return selection time-out
2512          * to any IO directed at non-zero LUNs
2513          */
2514         if (SCpnt->device->lun)
2515                 goto done;
2516
2517         /*
2518          * Check for request sense command, and handle it here
2519          * (autorequest sense)
2520          */
2521         if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2522                 SBP2_DEBUG("REQUEST_SENSE");
2523                 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2524                 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2525                 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
2526                 return 0;
2527         }
2528
2529         /*
2530          * Check to see if we are in the middle of a bus reset.
2531          */
2532         if (!hpsb_node_entry_valid(scsi_id->ne)) {
2533                 SBP2_ERR("Bus reset in progress - rejecting command");
2534                 result = DID_BUS_BUSY << 16;
2535                 goto done;
2536         }
2537
2538         /*
2539          * Try and send our SCSI command
2540          */
2541         if (sbp2_send_command(scsi_id, SCpnt, done)) {
2542                 SBP2_ERR("Error sending SCSI command");
2543                 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2544                                           SCpnt, done);
2545         }
2546         return 0;
2547
2548 done:
2549         SCpnt->result = result;
2550         done(SCpnt);
2551         return 0;
2552 }
2553
2554 /*
2555  * This function is called in order to complete all outstanding SBP-2
2556  * commands (in case of resets, etc.).
2557  */
2558 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2559                                            u32 status)
2560 {
2561         struct sbp2scsi_host_info *hi = scsi_id->hi;
2562         struct list_head *lh;
2563         struct sbp2_command_info *command;
2564
2565         SBP2_DEBUG("sbp2scsi_complete_all_commands");
2566
2567         while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2568                 SBP2_DEBUG("Found pending command to complete");
2569                 lh = scsi_id->sbp2_command_orb_inuse.next;
2570                 command = list_entry(lh, struct sbp2_command_info, list);
2571                 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2572                                             sizeof(struct sbp2_command_orb),
2573                                             PCI_DMA_BIDIRECTIONAL);
2574                 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2575                                             sizeof(command->scatter_gather_element),
2576                                             PCI_DMA_BIDIRECTIONAL);
2577                 sbp2util_mark_command_completed(scsi_id, command);
2578                 if (command->Current_SCpnt) {
2579                         command->Current_SCpnt->result = status << 16;
2580                         command->Current_done(command->Current_SCpnt);
2581                 }
2582         }
2583
2584         return;
2585 }
2586
2587 /*
2588  * This function is called in order to complete a regular SBP-2 command.
2589  *
2590  * This can be called in interrupt context.
2591  */
2592 static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2593                                       u32 scsi_status, struct scsi_cmnd *SCpnt,
2594                                       void (*done)(struct scsi_cmnd *))
2595 {
2596         SBP2_DEBUG("sbp2scsi_complete_command");
2597
2598         /*
2599          * Sanity
2600          */
2601         if (!SCpnt) {
2602                 SBP2_ERR("SCpnt is NULL");
2603                 return;
2604         }
2605
2606         /*
2607          * If a bus reset is in progress and there was an error, don't
2608          * complete the command, just let it get retried at the end of the
2609          * bus reset.
2610          */
2611         if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2612                 SBP2_ERR("Bus reset in progress - retry command later");
2613                 return;
2614         }
2615
2616         /*
2617          * Switch on scsi status
2618          */
2619         switch (scsi_status) {
2620                 case SBP2_SCSI_STATUS_GOOD:
2621                         SCpnt->result = DID_OK;
2622                         break;
2623
2624                 case SBP2_SCSI_STATUS_BUSY:
2625                         SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2626                         SCpnt->result = DID_BUS_BUSY << 16;
2627                         break;
2628
2629                 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2630                         SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2631                         SCpnt->result = CHECK_CONDITION << 1;
2632
2633                         /*
2634                          * Debug stuff
2635                          */
2636 #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
2637                         scsi_print_command(SCpnt);
2638                         scsi_print_sense("bh", SCpnt);
2639 #endif
2640
2641                         break;
2642
2643                 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2644                         SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2645                         SCpnt->result = DID_NO_CONNECT << 16;
2646                         scsi_print_command(SCpnt);
2647                         break;
2648
2649                 case SBP2_SCSI_STATUS_CONDITION_MET:
2650                 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2651                 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2652                         SBP2_ERR("Bad SCSI status = %x", scsi_status);
2653                         SCpnt->result = DID_ERROR << 16;
2654                         scsi_print_command(SCpnt);
2655                         break;
2656
2657                 default:
2658                         SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2659                         SCpnt->result = DID_ERROR << 16;
2660         }
2661
2662         /*
2663          * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2664          */
2665         if (SCpnt->result == DID_OK) {
2666                 sbp2_check_sbp2_response(scsi_id, SCpnt);
2667         }
2668
2669         /*
2670          * If a bus reset is in progress and there was an error, complete
2671          * the command as busy so that it will get retried.
2672          */
2673         if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2674                 SBP2_ERR("Completing command with busy (bus reset)");
2675                 SCpnt->result = DID_BUS_BUSY << 16;
2676         }
2677
2678         /*
2679          * If a unit attention occurs, return busy status so it gets
2680          * retried... it could have happened because of a 1394 bus reset
2681          * or hot-plug...
2682          */
2683 #if 0
2684         if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
2685             (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
2686                 SBP2_DEBUG("UNIT ATTENTION - return busy");
2687                 SCpnt->result = DID_BUS_BUSY << 16;
2688         }
2689 #endif
2690
2691         /*
2692          * Tell scsi stack that we're done with this command
2693          */
2694         done (SCpnt);
2695 }
2696
2697
2698 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
2699 {
2700         ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = sdev;
2701         return 0;
2702 }
2703
2704
2705 static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2706 {
2707         blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
2708         return 0;
2709 }
2710
2711
2712 static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2713 {
2714         ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL;
2715         return;
2716 }
2717
2718
2719 /*
2720  * Called by scsi stack when something has really gone wrong.  Usually
2721  * called when a command has timed-out for some reason.
2722  */
2723 static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2724 {
2725         struct scsi_id_instance_data *scsi_id =
2726                 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2727         struct sbp2scsi_host_info *hi = scsi_id->hi;
2728         struct sbp2_command_info *command;
2729
2730         SBP2_ERR("aborting sbp2 command");
2731         scsi_print_command(SCpnt);
2732
2733         if (sbp2util_node_is_available(scsi_id)) {
2734
2735                 /*
2736                  * Right now, just return any matching command structures
2737                  * to the free pool.
2738                  */
2739                 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2740                 if (command) {
2741                         SBP2_DEBUG("Found command to abort");
2742                         pci_dma_sync_single_for_cpu(hi->host->pdev,
2743                                                     command->command_orb_dma,
2744                                                     sizeof(struct sbp2_command_orb),
2745                                                     PCI_DMA_BIDIRECTIONAL);
2746                         pci_dma_sync_single_for_cpu(hi->host->pdev,
2747                                                     command->sge_dma,
2748                                                     sizeof(command->scatter_gather_element),
2749                                                     PCI_DMA_BIDIRECTIONAL);
2750                         sbp2util_mark_command_completed(scsi_id, command);
2751                         if (command->Current_SCpnt) {
2752                                 command->Current_SCpnt->result = DID_ABORT << 16;
2753                                 command->Current_done(command->Current_SCpnt);
2754                         }
2755                 }
2756
2757                 /*
2758                  * Initiate a fetch agent reset.
2759                  */
2760                 sbp2_agent_reset(scsi_id, 0);
2761                 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2762         }
2763
2764         return(SUCCESS);
2765 }
2766
2767 /*
2768  * Called by scsi stack when something has really gone wrong.
2769  */
2770 static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2771 {
2772         struct scsi_id_instance_data *scsi_id =
2773                 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2774         unsigned long flags;
2775
2776         SBP2_ERR("reset requested");
2777
2778         spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
2779
2780         if (sbp2util_node_is_available(scsi_id)) {
2781                 SBP2_ERR("Generating sbp2 fetch agent reset");
2782                 sbp2_agent_reset(scsi_id, 0);
2783         }
2784
2785         spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
2786
2787         return SUCCESS;
2788 }
2789
2790 static const char *sbp2scsi_info (struct Scsi_Host *host)
2791 {
2792         return "SCSI emulation for IEEE-1394 SBP-2 Devices";
2793 }
2794
2795 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, char *buf)
2796 {
2797         struct scsi_device *sdev;
2798         struct scsi_id_instance_data *scsi_id;
2799         int lun;
2800
2801         if (!(sdev = to_scsi_device(dev)))
2802                 return 0;
2803
2804         if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2805                 return 0;
2806
2807         if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED)
2808                 lun = 0;
2809         else
2810                 lun = ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
2811
2812         return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2813                        scsi_id->ud->id, lun);
2814 }
2815 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
2816
2817 static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
2818         &dev_attr_ieee1394_id,
2819         NULL
2820 };
2821
2822 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2823 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2824 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2825 MODULE_LICENSE("GPL");
2826
2827 /* SCSI host template */
2828 static struct scsi_host_template scsi_driver_template = {
2829         .module =                       THIS_MODULE,
2830         .name =                         "SBP-2 IEEE-1394",
2831         .proc_name =                    SBP2_DEVICE_NAME,
2832         .info =                         sbp2scsi_info,
2833         .queuecommand =                 sbp2scsi_queuecommand,
2834         .eh_abort_handler =             sbp2scsi_abort,
2835         .eh_device_reset_handler =      sbp2scsi_reset,
2836         .eh_bus_reset_handler =         sbp2scsi_reset,
2837         .eh_host_reset_handler =        sbp2scsi_reset,
2838         .slave_alloc =                  sbp2scsi_slave_alloc,
2839         .slave_configure =              sbp2scsi_slave_configure,
2840         .slave_destroy =                sbp2scsi_slave_destroy,
2841         .this_id =                      -1,
2842         .sg_tablesize =                 SG_ALL,
2843         .use_clustering =               ENABLE_CLUSTERING,
2844         .cmd_per_lun =                  SBP2_MAX_CMDS,
2845         .can_queue =                    SBP2_MAX_CMDS,
2846         .emulated =                     1,
2847         .sdev_attrs =                   sbp2_sysfs_sdev_attrs,
2848 };
2849
2850 static int sbp2_module_init(void)
2851 {
2852         int ret;
2853
2854         SBP2_DEBUG("sbp2_module_init");
2855
2856         printk(KERN_INFO "sbp2: %s\n", version);
2857
2858         /* Module load debug option to force one command at a time (serializing I/O) */
2859         if (serialize_io) {
2860                 SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)");
2861                 scsi_driver_template.can_queue = 1;
2862                 scsi_driver_template.cmd_per_lun = 1;
2863         }
2864
2865         /* Set max sectors (module load option). Default is 255 sectors. */
2866         scsi_driver_template.max_sectors = max_sectors;
2867
2868
2869         /* Register our high level driver with 1394 stack */
2870         hpsb_register_highlevel(&sbp2_highlevel);
2871
2872         ret = hpsb_register_protocol(&sbp2_driver);
2873         if (ret) {
2874                 SBP2_ERR("Failed to register protocol");
2875                 hpsb_unregister_highlevel(&sbp2_highlevel);
2876                 return ret;
2877         }
2878
2879         return 0;
2880 }
2881
2882 static void __exit sbp2_module_exit(void)
2883 {
2884         SBP2_DEBUG("sbp2_module_exit");
2885
2886         hpsb_unregister_protocol(&sbp2_driver);
2887
2888         hpsb_unregister_highlevel(&sbp2_highlevel);
2889 }
2890
2891 module_init(sbp2_module_init);
2892 module_exit(sbp2_module_exit);