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   1 /*
   2  * dc395x.c
   3  *
   4  * Device Driver for Tekram DC395(U/UW/F), DC315(U)
   5  * PCI SCSI Bus Master Host Adapter
   6  * (SCSI chip set used Tekram ASIC TRM-S1040)
   7  *
   8  * Authors:
   9  *  C.L. Huang <ching@tekram.com.tw>
  10  *  Erich Chen <erich@tekram.com.tw>
  11  *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
  12  *
  13  *  Kurt Garloff <garloff@suse.de>
  14  *  (C) 1999-2000 Kurt Garloff
  15  *
  16  *  Oliver Neukum <oliver@neukum.name>
  17  *  Ali Akcaagac <aliakc@web.de>
  18  *  Jamie Lenehan <lenehan@twibble.org>
  19  *  (C) 2003
  20  *
  21  * License: GNU GPL
  22  *
  23  *************************************************************************
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the above copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. The name of the author may not be used to endorse or promote products
  34  *    derived from this software without specific prior written permission.
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  37  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  38  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  39  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  40  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  42  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  43  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  44  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  45  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  46  *
  47  ************************************************************************
  48  */
  49 #include <linux/module.h>
  50 #include <linux/moduleparam.h>
  51 #include <linux/delay.h>
  52 #include <linux/ctype.h>
  53 #include <linux/blkdev.h>
  54 #include <linux/interrupt.h>
  55 #include <linux/init.h>
  56 #include <linux/spinlock.h>
  57 #include <linux/pci.h>
  58 #include <linux/list.h>
  59 #include <linux/vmalloc.h>
  60 #include <asm/io.h>
  61
  62 #include <scsi/scsi.h>
  63 #include <scsi/scsicam.h>       /* needed for scsicam_bios_param */
  64 #include <scsi/scsi_cmnd.h>
  65 #include <scsi/scsi_device.h>
  66 #include <scsi/scsi_host.h>
  67
  68 #include "dc395x.h"
  69
  70 #define DC395X_NAME     "dc395x"
  71 #define DC395X_BANNER   "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
  72 #define DC395X_VERSION  "v2.05, 2004/03/08"
  73
  74 /*---------------------------------------------------------------------------
  75                                   Features
  76  ---------------------------------------------------------------------------*/
  77 /*
  78  * Set to disable parts of the driver
  79  */
  80 /*#define DC395x_NO_DISCONNECT*/
  81 /*#define DC395x_NO_TAGQ*/
  82 /*#define DC395x_NO_SYNC*/
  83 /*#define DC395x_NO_WIDE*/
  84
  85 /*---------------------------------------------------------------------------
  86                                   Debugging
  87  ---------------------------------------------------------------------------*/
  88 /*
  89  * Types of debugging that can be enabled and disabled
  90  */
  91 #define DBG_KG          0x0001
  92 #define DBG_0           0x0002
  93 #define DBG_1           0x0004
  94 #define DBG_SG          0x0020
  95 #define DBG_FIFO        0x0040
  96 #define DBG_PIO         0x0080
  97
  98
  99 /*
 100  * Set set of things to output debugging for.
 101  * Undefine to remove all debugging
 102  */
 103 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
 104 /*#define  DEBUG_MASK   DBG_0*/
 105
 106
 107 /*
 108  * Output a kernel mesage at the specified level and append the
 109  * driver name and a ": " to the start of the message
 110  */
 111 #define dprintkl(level, format, arg...)  \
 112     printk(level DC395X_NAME ": " format , ## arg)
 113
 114
 115 #ifdef DEBUG_MASK
 116 /*
 117  * print a debug message - this is formated with KERN_DEBUG, then the
 118  * driver name followed by a ": " and then the message is output.
 119  * This also checks that the specified debug level is enabled before
 120  * outputing the message
 121  */
 122 #define dprintkdbg(type, format, arg...) \
 123         do { \
 124                 if ((type) & (DEBUG_MASK)) \
 125                         dprintkl(KERN_DEBUG , format , ## arg); \
 126         } while (0)
 127
 128 /*
 129  * Check if the specified type of debugging is enabled
 130  */
 131 #define debug_enabled(type)     ((DEBUG_MASK) & (type))
 132
 133 #else
 134 /*
 135  * No debugging. Do nothing
 136  */
 137 #define dprintkdbg(type, format, arg...) \
 138         do {} while (0)
 139 #define debug_enabled(type)     (0)
 140
 141 #endif
 142
 143
 144 #ifndef PCI_VENDOR_ID_TEKRAM
 145 #define PCI_VENDOR_ID_TEKRAM                    0x1DE1  /* Vendor ID    */
 146 #endif
 147 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
 148 #define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391  /* Device ID    */
 149 #endif
 150
 151
 152 #define DC395x_LOCK_IO(dev,flags)               spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
 153 #define DC395x_UNLOCK_IO(dev,flags)             spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
 154
 155 #define DC395x_read8(acb,address)               (u8)(inb(acb->io_port_base + (address)))
 156 #define DC395x_read16(acb,address)              (u16)(inw(acb->io_port_base + (address)))
 157 #define DC395x_read32(acb,address)              (u32)(inl(acb->io_port_base + (address)))
 158 #define DC395x_write8(acb,address,value)        outb((value), acb->io_port_base + (address))
 159 #define DC395x_write16(acb,address,value)       outw((value), acb->io_port_base + (address))
 160 #define DC395x_write32(acb,address,value)       outl((value), acb->io_port_base + (address))
 161
 162 /* cmd->result */
 163 #define RES_TARGET              0x000000FF      /* Target State */
 164 #define RES_TARGET_LNX  STATUS_MASK     /* Only official ... */
 165 #define RES_ENDMSG              0x0000FF00      /* End Message */
 166 #define RES_DID                 0x00FF0000      /* DID_ codes */
 167 #define RES_DRV                 0xFF000000      /* DRIVER_ codes */
 168
 169 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
 170 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
 171
 172 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
 173 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
 174 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
 175 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
 176 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
 177
 178 #define TAG_NONE 255
 179
 180 /*
 181  * srb->segement_x is the hw sg list. It is always allocated as a
 182  * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
 183  * cross a page boundy.
 184  */
 185 #define SEGMENTX_LEN    (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
 186
 187
 188 struct SGentry {
 189         u32 address;            /* bus! address */
 190         u32 length;
 191 };
 192
 193 /* The SEEPROM structure for TRM_S1040 */
 194 struct NVRamTarget {
 195         u8 cfg0;                /* Target configuration byte 0  */
 196         u8 period;              /* Target period                */
 197         u8 cfg2;                /* Target configuration byte 2  */
 198         u8 cfg3;                /* Target configuration byte 3  */
 199 };
 200
 201 struct NvRamType {
 202         u8 sub_vendor_id[2];    /* 0,1  Sub Vendor ID   */
 203         u8 sub_sys_id[2];       /* 2,3  Sub System ID   */
 204         u8 sub_class;           /* 4    Sub Class       */
 205         u8 vendor_id[2];        /* 5,6  Vendor ID       */
 206         u8 device_id[2];        /* 7,8  Device ID       */
 207         u8 reserved;            /* 9    Reserved        */
 208         struct NVRamTarget target[DC395x_MAX_SCSI_ID];
 209                                                 /** 10,11,12,13
 210                                                  ** 14,15,16,17
 211                                                  ** ....
 212                                                  ** ....
 213                                                  ** 70,71,72,73
 214                                                  */
 215         u8 scsi_id;             /* 74 Host Adapter SCSI ID      */
 216         u8 channel_cfg;         /* 75 Channel configuration     */
 217         u8 delay_time;          /* 76 Power on delay time       */
 218         u8 max_tag;             /* 77 Maximum tags              */
 219         u8 reserved0;           /* 78  */
 220         u8 boot_target;         /* 79  */
 221         u8 boot_lun;            /* 80  */
 222         u8 reserved1;           /* 81  */
 223         u16 reserved2[22];      /* 82,..125 */
 224         u16 cksum;              /* 126,127 */
 225 };
 226
 227 struct ScsiReqBlk {
 228         struct list_head list;          /* next/prev ptrs for srb lists */
 229         struct DeviceCtlBlk *dcb;
 230         struct scsi_cmnd *cmd;
 231
 232         struct SGentry *segment_x;      /* Linear array of hw sg entries (up to 64 entries) */
 233         dma_addr_t sg_bus_addr;         /* Bus address of sg list (ie, of segment_x) */
 234
 235         u8 sg_count;                    /* No of HW sg entries for this request */
 236         u8 sg_index;                    /* Index of HW sg entry for this request */
 237         size_t total_xfer_length;       /* Total number of bytes remaining to be transfered */
 238         size_t request_length;          /* Total number of bytes in this request */
 239         /*
 240          * The sense buffer handling function, request_sense, uses
 241          * the first hw sg entry (segment_x[0]) and the transfer
 242          * length (total_xfer_length). While doing this it stores the
 243          * original values into the last sg hw list
 244          * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
 245          * total_xfer_length in xferred. These values are restored in
 246          * pci_unmap_srb_sense. This is the only place xferred is used.
 247          */
 248         size_t xferred;                 /* Saved copy of total_xfer_length */
 249
 250         u16 state;
 251
 252         u8 msgin_buf[6];
 253         u8 msgout_buf[6];
 254
 255         u8 adapter_status;
 256         u8 target_status;
 257         u8 msg_count;
 258         u8 end_message;
 259
 260         u8 tag_number;
 261         u8 status;
 262         u8 retry_count;
 263         u8 flag;
 264
 265         u8 scsi_phase;
 266 };
 267
 268 struct DeviceCtlBlk {
 269         struct list_head list;          /* next/prev ptrs for the dcb list */
 270         struct AdapterCtlBlk *acb;
 271         struct list_head srb_going_list;        /* head of going srb list */
 272         struct list_head srb_waiting_list;      /* head of waiting srb list */
 273
 274         struct ScsiReqBlk *active_srb;
 275         u32 tag_mask;
 276
 277         u16 max_command;
 278
 279         u8 target_id;           /* SCSI Target ID  (SCSI Only) */
 280         u8 target_lun;          /* SCSI Log.  Unit (SCSI Only) */
 281         u8 identify_msg;
 282         u8 dev_mode;
 283
 284         u8 inquiry7;            /* To store Inquiry flags */
 285         u8 sync_mode;           /* 0:async mode */
 286         u8 min_nego_period;     /* for nego. */
 287         u8 sync_period;         /* for reg.  */
 288
 289         u8 sync_offset;         /* for reg. and nego.(low nibble) */
 290         u8 flag;
 291         u8 dev_type;
 292         u8 init_tcq_flag;
 293 };
 294
 295 struct AdapterCtlBlk {
 296         struct Scsi_Host *scsi_host;
 297
 298         unsigned long io_port_base;
 299         unsigned long io_port_len;
 300
 301         struct list_head dcb_list;              /* head of going dcb list */
 302         struct DeviceCtlBlk *dcb_run_robin;
 303         struct DeviceCtlBlk *active_dcb;
 304
 305         struct list_head srb_free_list;         /* head of free srb list */
 306         struct ScsiReqBlk *tmp_srb;
 307         struct timer_list waiting_timer;
 308         struct timer_list selto_timer;
 309
 310         u16 srb_count;
 311
 312         u8 sel_timeout;
 313
 314         unsigned int irq_level;
 315         u8 tag_max_num;
 316         u8 acb_flag;
 317         u8 gmode2;
 318
 319         u8 config;
 320         u8 lun_chk;
 321         u8 scan_devices;
 322         u8 hostid_bit;
 323
 324         u8 dcb_map[DC395x_MAX_SCSI_ID];
 325         struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
 326
 327         struct pci_dev *dev;
 328
 329         u8 msg_len;
 330
 331         struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
 332         struct ScsiReqBlk srb;
 333
 334         struct NvRamType eeprom;        /* eeprom settings for this adapter */
 335 };
 336
 337
 338 /*---------------------------------------------------------------------------
 339                             Forward declarations
 340  ---------------------------------------------------------------------------*/
 341 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 342                 u16 *pscsi_status);
 343 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 344                 u16 *pscsi_status);
 345 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 346                 u16 *pscsi_status);
 347 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 348                 u16 *pscsi_status);
 349 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 350                 u16 *pscsi_status);
 351 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 352                 u16 *pscsi_status);
 353 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 354                 u16 *pscsi_status);
 355 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 356                 u16 *pscsi_status);
 357 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 358                 u16 *pscsi_status);
 359 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 360                 u16 *pscsi_status);
 361 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 362                 u16 *pscsi_status);
 363 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 364                 u16 *pscsi_status);
 365 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 366                 u16 *pscsi_status);
 367 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 368                 u16 *pscsi_status);
 369 static void set_basic_config(struct AdapterCtlBlk *acb);
 370 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
 371                 struct ScsiReqBlk *srb);
 372 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
 373 static void data_io_transfer(struct AdapterCtlBlk *acb,
 374                 struct ScsiReqBlk *srb, u16 io_dir);
 375 static void disconnect(struct AdapterCtlBlk *acb);
 376 static void reselect(struct AdapterCtlBlk *acb);
 377 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 378                 struct ScsiReqBlk *srb);
 379 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
 380                 struct ScsiReqBlk *srb);
 381 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
 382                 struct ScsiReqBlk *srb);
 383 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
 384                 struct scsi_cmnd *cmd, u8 force);
 385 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
 386 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
 387 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
 388                 struct ScsiReqBlk *srb);
 389 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 390                 struct ScsiReqBlk *srb);
 391 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 392                 struct ScsiReqBlk *srb);
 393 static void set_xfer_rate(struct AdapterCtlBlk *acb,
 394                 struct DeviceCtlBlk *dcb);
 395 static void waiting_timeout(unsigned long ptr);
 396
 397
 398 /*---------------------------------------------------------------------------
 399                                  Static Data
 400  ---------------------------------------------------------------------------*/
 401 static u16 current_sync_offset = 0;
 402
 403 static void *dc395x_scsi_phase0[] = {
 404         data_out_phase0,/* phase:0 */
 405         data_in_phase0, /* phase:1 */
 406         command_phase0, /* phase:2 */
 407         status_phase0,  /* phase:3 */
 408         nop0,           /* phase:4 PH_BUS_FREE .. initial phase */
 409         nop0,           /* phase:5 PH_BUS_FREE .. initial phase */
 410         msgout_phase0,  /* phase:6 */
 411         msgin_phase0,   /* phase:7 */
 412 };
 413
 414 static void *dc395x_scsi_phase1[] = {
 415         data_out_phase1,/* phase:0 */
 416         data_in_phase1, /* phase:1 */
 417         command_phase1, /* phase:2 */
 418         status_phase1,  /* phase:3 */
 419         nop1,           /* phase:4 PH_BUS_FREE .. initial phase */
 420         nop1,           /* phase:5 PH_BUS_FREE .. initial phase */
 421         msgout_phase1,  /* phase:6 */
 422         msgin_phase1,   /* phase:7 */
 423 };
 424
 425 /*
 426  *Fast20:       000      50ns, 20.0 MHz
 427  *              001      75ns, 13.3 MHz
 428  *              010     100ns, 10.0 MHz
 429  *              011     125ns,  8.0 MHz
 430  *              100     150ns,  6.6 MHz
 431  *              101     175ns,  5.7 MHz
 432  *              110     200ns,  5.0 MHz
 433  *              111     250ns,  4.0 MHz
 434  *
 435  *Fast40(LVDS): 000      25ns, 40.0 MHz
 436  *              001      50ns, 20.0 MHz
 437  *              010      75ns, 13.3 MHz
 438  *              011     100ns, 10.0 MHz
 439  *              100     125ns,  8.0 MHz
 440  *              101     150ns,  6.6 MHz
 441  *              110     175ns,  5.7 MHz
 442  *              111     200ns,  5.0 MHz
 443  */
 444 /*static u8     clock_period[] = {12,19,25,31,37,44,50,62};*/
 445
 446 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
 447 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
 448 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
 449
 450
 451 /*---------------------------------------------------------------------------
 452                                 Configuration
 453   ---------------------------------------------------------------------------*/
 454 /*
 455  * Module/boot parameters currently effect *all* instances of the
 456  * card in the system.
 457  */
 458
 459 /*
 460  * Command line parameters are stored in a structure below.
 461  * These are the index's into the structure for the various
 462  * command line options.
 463  */
 464 #define CFG_ADAPTER_ID          0
 465 #define CFG_MAX_SPEED           1
 466 #define CFG_DEV_MODE            2
 467 #define CFG_ADAPTER_MODE        3
 468 #define CFG_TAGS                4
 469 #define CFG_RESET_DELAY         5
 470
 471 #define CFG_NUM                 6       /* number of configuration items */
 472
 473
 474 /*
 475  * Value used to indicate that a command line override
 476  * hasn't been used to modify the value.
 477  */
 478 #define CFG_PARAM_UNSET -1
 479
 480
 481 /*
 482  * Hold command line parameters.
 483  */
 484 struct ParameterData {
 485         int value;              /* value of this setting */
 486         int min;                /* minimum value */
 487         int max;                /* maximum value */
 488         int def;                /* default value */
 489         int safe;               /* safe value */
 490 };
 491 static struct ParameterData __devinitdata cfg_data[] = {
 492         { /* adapter id */
 493                 CFG_PARAM_UNSET,
 494                 0,
 495                 15,
 496                 7,
 497                 7
 498         },
 499         { /* max speed */
 500                 CFG_PARAM_UNSET,
 501                   0,
 502                   7,
 503                   1,    /* 13.3Mhz */
 504                   4,    /*  6.7Hmz */
 505         },
 506         { /* dev mode */
 507                 CFG_PARAM_UNSET,
 508                 0,
 509                 0x3f,
 510                 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
 511                         NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
 512                         NTC_DO_SEND_START,
 513                 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
 514         },
 515         { /* adapter mode */
 516                 CFG_PARAM_UNSET,
 517                 0,
 518                 0x2f,
 519 #ifdef CONFIG_SCSI_MULTI_LUN
 520                         NAC_SCANLUN |
 521 #endif
 522                 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
 523                         /*| NAC_ACTIVE_NEG*/,
 524                 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
 525         },
 526         { /* tags */
 527                 CFG_PARAM_UNSET,
 528                 0,
 529                 5,
 530                 3,      /* 16 tags (??) */
 531                 2,
 532         },
 533         { /* reset delay */
 534                 CFG_PARAM_UNSET,
 535                 0,
 536                 180,
 537                 1,      /* 1 second */
 538                 10,     /* 10 seconds */
 539         }
 540 };
 541
 542
 543 /*
 544  * Safe settings. If set to zero the the BIOS/default values with
 545  * command line overrides will be used. If set to 1 then safe and
 546  * slow settings will be used.
 547  */
 548 static int use_safe_settings = 0;
 549 module_param_named(safe, use_safe_settings, bool, 0);
 550 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
 551
 552
 553 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
 554 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
 555
 556 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
 557 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
 558
 559 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
 560 MODULE_PARM_DESC(dev_mode, "Device mode.");
 561
 562 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
 563 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
 564
 565 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
 566 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
 567
 568 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
 569 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
 570
 571
 572 /**
 573  * set_safe_settings - if the use_safe_settings option is set then
 574  * set all values to the safe and slow values.
 575  **/
 576 static void __devinit set_safe_settings(void)
 577 {
 578         if (use_safe_settings)
 579         {
 580                 int i;
 581
 582                 dprintkl(KERN_INFO, "Using safe settings.\n");
 583                 for (i = 0; i < CFG_NUM; i++)
 584                 {
 585                         cfg_data[i].value = cfg_data[i].safe;
 586                 }
 587         }
 588 }
 589
 590
 591 /**
 592  * fix_settings - reset any boot parameters which are out of range
 593  * back to the default values.
 594  **/
 595 static void __devinit fix_settings(void)
 596 {
 597         int i;
 598
 599         dprintkdbg(DBG_1,
 600                 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
 601                 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
 602                 cfg_data[CFG_ADAPTER_ID].value,
 603                 cfg_data[CFG_MAX_SPEED].value,
 604                 cfg_data[CFG_DEV_MODE].value,
 605                 cfg_data[CFG_ADAPTER_MODE].value,
 606                 cfg_data[CFG_TAGS].value,
 607                 cfg_data[CFG_RESET_DELAY].value);
 608         for (i = 0; i < CFG_NUM; i++)
 609         {
 610                 if (cfg_data[i].value < cfg_data[i].min
 611                     || cfg_data[i].value > cfg_data[i].max)
 612                         cfg_data[i].value = cfg_data[i].def;
 613         }
 614 }
 615
 616
 617
 618 /*
 619  * Mapping from the eeprom delay index value (index into this array)
 620  * to the the number of actual seconds that the delay should be for.
 621  */
 622 static char __devinitdata eeprom_index_to_delay_map[] =
 623         { 1, 3, 5, 10, 16, 30, 60, 120 };
 624
 625
 626 /**
 627  * eeprom_index_to_delay - Take the eeprom delay setting and convert it
 628  * into a number of seconds.
 629  *
 630  * @eeprom: The eeprom structure in which we find the delay index to map.
 631  **/
 632 static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
 633 {
 634         eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
 635 }
 636
 637
 638 /**
 639  * delay_to_eeprom_index - Take a delay in seconds and return the
 640  * closest eeprom index which will delay for at least that amount of
 641  * seconds.
 642  *
 643  * @delay: The delay, in seconds, to find the eeprom index for.
 644  **/
 645 static int __devinit delay_to_eeprom_index(int delay)
 646 {
 647         u8 idx = 0;
 648         while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
 649                 idx++;
 650         return idx;
 651 }
 652
 653
 654 /**
 655  * eeprom_override - Override the eeprom settings, in the provided
 656  * eeprom structure, with values that have been set on the command
 657  * line.
 658  *
 659  * @eeprom: The eeprom data to override with command line options.
 660  **/
 661 static void __devinit eeprom_override(struct NvRamType *eeprom)
 662 {
 663         u8 id;
 664
 665         /* Adapter Settings */
 666         if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
 667                 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
 668
 669         if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
 670                 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
 671
 672         if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
 673                 eeprom->delay_time = delay_to_eeprom_index(
 674                                         cfg_data[CFG_RESET_DELAY].value);
 675
 676         if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
 677                 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
 678
 679         /* Device Settings */
 680         for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
 681                 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
 682                         eeprom->target[id].cfg0 =
 683                                 (u8)cfg_data[CFG_DEV_MODE].value;
 684
 685                 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
 686                         eeprom->target[id].period =
 687                                 (u8)cfg_data[CFG_MAX_SPEED].value;
 688
 689         }
 690 }
 691
 692
 693 /*---------------------------------------------------------------------------
 694  ---------------------------------------------------------------------------*/
 695
 696 static unsigned int list_size(struct list_head *head)
 697 {
 698         unsigned int count = 0;
 699         struct list_head *pos;
 700         list_for_each(pos, head)
 701                 count++;
 702         return count;
 703 }
 704
 705
 706 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
 707                 struct DeviceCtlBlk *pos)
 708 {
 709         int use_next = 0;
 710         struct DeviceCtlBlk* next = NULL;
 711         struct DeviceCtlBlk* i;
 712
 713         if (list_empty(head))
 714                 return NULL;
 715
 716         /* find supplied dcb and then select the next one */
 717         list_for_each_entry(i, head, list)
 718                 if (use_next) {
 719                         next = i;
 720                         break;
 721                 } else if (i == pos) {
 722                         use_next = 1;
 723                 }
 724         /* if no next one take the head one (ie, wraparound) */
 725         if (!next)
 726                 list_for_each_entry(i, head, list) {
 727                         next = i;
 728                         break;
 729                 }
 730
 731         return next;
 732 }
 733
 734
 735 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
 736 {
 737         if (srb->tag_number < 255) {
 738                 dcb->tag_mask &= ~(1 << srb->tag_number);       /* free tag mask */
 739                 srb->tag_number = 255;
 740         }
 741 }
 742
 743
 744 /* Find cmd in SRB list */
 745 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
 746                 struct list_head *head)
 747 {
 748         struct ScsiReqBlk *i;
 749         list_for_each_entry(i, head, list)
 750                 if (i->cmd == cmd)
 751                         return i;
 752         return NULL;
 753 }
 754
 755
 756 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
 757 {
 758         struct list_head *head = &acb->srb_free_list;
 759         struct ScsiReqBlk *srb = NULL;
 760
 761         if (!list_empty(head)) {
 762                 srb = list_entry(head->next, struct ScsiReqBlk, list);
 763                 list_del(head->next);
 764                 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
 765         }
 766         return srb;
 767 }
 768
 769
 770 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
 771 {
 772         dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
 773         list_add_tail(&srb->list, &acb->srb_free_list);
 774 }
 775
 776
 777 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
 778                 struct ScsiReqBlk *srb)
 779 {
 780         dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
 781                 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
 782         list_add(&srb->list, &dcb->srb_waiting_list);
 783 }
 784
 785
 786 static void srb_waiting_append(struct DeviceCtlBlk *dcb,
 787                 struct ScsiReqBlk *srb)
 788 {
 789         dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
 790                  srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
 791         list_add_tail(&srb->list, &dcb->srb_waiting_list);
 792 }
 793
 794
 795 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
 796 {
 797         dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
 798                 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
 799         list_add_tail(&srb->list, &dcb->srb_going_list);
 800 }
 801
 802
 803 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
 804 {
 805         struct ScsiReqBlk *i;
 806         struct ScsiReqBlk *tmp;
 807         dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
 808                 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
 809
 810         list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
 811                 if (i == srb) {
 812                         list_del(&srb->list);
 813                         break;
 814                 }
 815 }
 816
 817
 818 static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
 819                 struct ScsiReqBlk *srb)
 820 {
 821         struct ScsiReqBlk *i;
 822         struct ScsiReqBlk *tmp;
 823         dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
 824                 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
 825
 826         list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
 827                 if (i == srb) {
 828                         list_del(&srb->list);
 829                         break;
 830                 }
 831 }
 832
 833
 834 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
 835                 struct ScsiReqBlk *srb)
 836 {
 837         dprintkdbg(DBG_0,
 838                 "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
 839                 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
 840         list_move(&srb->list, &dcb->srb_waiting_list);
 841 }
 842
 843
 844 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
 845                 struct ScsiReqBlk *srb)
 846 {
 847         dprintkdbg(DBG_0,
 848                 "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
 849                 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
 850         list_move(&srb->list, &dcb->srb_going_list);
 851 }
 852
 853
 854 /* Sets the timer to wake us up */
 855 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
 856 {
 857         if (timer_pending(&acb->waiting_timer))
 858                 return;
 859         init_timer(&acb->waiting_timer);
 860         acb->waiting_timer.function = waiting_timeout;
 861         acb->waiting_timer.data = (unsigned long) acb;
 862         if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
 863                 acb->waiting_timer.expires =
 864                     acb->scsi_host->last_reset - HZ / 2 + 1;
 865         else
 866                 acb->waiting_timer.expires = jiffies + to + 1;
 867         add_timer(&acb->waiting_timer);
 868 }
 869
 870
 871 /* Send the next command from the waiting list to the bus */
 872 static void waiting_process_next(struct AdapterCtlBlk *acb)
 873 {
 874         struct DeviceCtlBlk *start = NULL;
 875         struct DeviceCtlBlk *pos;
 876         struct DeviceCtlBlk *dcb;
 877         struct ScsiReqBlk *srb;
 878         struct list_head *dcb_list_head = &acb->dcb_list;
 879
 880         if (acb->active_dcb
 881             || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
 882                 return;
 883
 884         if (timer_pending(&acb->waiting_timer))
 885                 del_timer(&acb->waiting_timer);
 886
 887         if (list_empty(dcb_list_head))
 888                 return;
 889
 890         /*
 891          * Find the starting dcb. Need to find it again in the list
 892          * since the list may have changed since we set the ptr to it
 893          */
 894         list_for_each_entry(dcb, dcb_list_head, list)
 895                 if (dcb == acb->dcb_run_robin) {
 896                         start = dcb;
 897                         break;
 898                 }
 899         if (!start) {
 900                 /* This can happen! */
 901                 start = list_entry(dcb_list_head->next, typeof(*start), list);
 902                 acb->dcb_run_robin = start;
 903         }
 904
 905
 906         /*
 907          * Loop over the dcb, but we start somewhere (potentially) in
 908          * the middle of the loop so we need to manully do this.
 909          */
 910         pos = start;
 911         do {
 912                 struct list_head *waiting_list_head = &pos->srb_waiting_list;
 913
 914                 /* Make sure, the next another device gets scheduled ... */
 915                 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
 916                                                   acb->dcb_run_robin);
 917
 918                 if (list_empty(waiting_list_head) ||
 919                     pos->max_command <= list_size(&pos->srb_going_list)) {
 920                         /* move to next dcb */
 921                         pos = dcb_get_next(dcb_list_head, pos);
 922                 } else {
 923                         srb = list_entry(waiting_list_head->next,
 924                                          struct ScsiReqBlk, list);
 925
 926                         /* Try to send to the bus */
 927                         if (!start_scsi(acb, pos, srb))
 928                                 srb_waiting_to_going_move(pos, srb);
 929                         else
 930                                 waiting_set_timer(acb, HZ/50);
 931                         break;
 932                 }
 933         } while (pos != start);
 934 }
 935
 936
 937 /* Wake up waiting queue */
 938 static void waiting_timeout(unsigned long ptr)
 939 {
 940         unsigned long flags;
 941         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
 942         dprintkdbg(DBG_1,
 943                 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
 944         DC395x_LOCK_IO(acb->scsi_host, flags);
 945         waiting_process_next(acb);
 946         DC395x_UNLOCK_IO(acb->scsi_host, flags);
 947 }
 948
 949
 950 /* Get the DCB for a given ID/LUN combination */
 951 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
 952 {
 953         return acb->children[id][lun];
 954 }
 955
 956
 957 /* Send SCSI Request Block (srb) to adapter (acb) */
 958 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
 959 {
 960         struct DeviceCtlBlk *dcb = srb->dcb;
 961
 962         if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
 963             acb->active_dcb ||
 964             (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
 965                 srb_waiting_append(dcb, srb);
 966                 waiting_process_next(acb);
 967                 return;
 968         }
 969
 970         if (!start_scsi(acb, dcb, srb))
 971                 srb_going_append(dcb, srb);
 972         else {
 973                 srb_waiting_insert(dcb, srb);
 974                 waiting_set_timer(acb, HZ / 50);
 975         }
 976 }
 977
 978 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
 979 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
 980                 struct ScsiReqBlk *srb)
 981 {
 982         enum dma_data_direction dir = cmd->sc_data_direction;
 983         dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
 984                 cmd->pid, dcb->target_id, dcb->target_lun);
 985
 986         srb->dcb = dcb;
 987         srb->cmd = cmd;
 988         srb->sg_count = 0;
 989         srb->total_xfer_length = 0;
 990         srb->sg_bus_addr = 0;
 991         srb->sg_index = 0;
 992         srb->adapter_status = 0;
 993         srb->target_status = 0;
 994         srb->msg_count = 0;
 995         srb->status = 0;
 996         srb->flag = 0;
 997         srb->state = 0;
 998         srb->retry_count = 0;
 999         srb->tag_number = TAG_NONE;
1000         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1001         srb->end_message = 0;
1002
1003         if (dir == PCI_DMA_NONE || !cmd->request_buffer) {
1004                 dprintkdbg(DBG_0,
1005                         "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1006                         cmd->bufflen, cmd->request_buffer,
1007                         cmd->use_sg, srb->segment_x[0].address);
1008         } else if (cmd->use_sg) {
1009                 int i;
1010                 u32 reqlen = cmd->request_bufflen;
1011                 struct scatterlist *sl = (struct scatterlist *)
1012                                          cmd->request_buffer;
1013                 struct SGentry *sgp = srb->segment_x;
1014                 srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg,
1015                                            dir);
1016                 dprintkdbg(DBG_0,
1017                         "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1018                         reqlen, cmd->request_buffer, cmd->use_sg,
1019                         srb->sg_count);
1020
1021                 for (i = 0; i < srb->sg_count; i++) {
1022                         u32 busaddr = (u32)sg_dma_address(&sl[i]);
1023                         u32 seglen = (u32)sl[i].length;
1024                         sgp[i].address = busaddr;
1025                         sgp[i].length = seglen;
1026                         srb->total_xfer_length += seglen;
1027                 }
1028                 sgp += srb->sg_count - 1;
1029
1030                 /*
1031                  * adjust last page if too big as it is allocated
1032                  * on even page boundaries
1033                  */
1034                 if (srb->total_xfer_length > reqlen) {
1035                         sgp->length -= (srb->total_xfer_length - reqlen);
1036                         srb->total_xfer_length = reqlen;
1037                 }
1038
1039                 /* Fixup for WIDE padding - make sure length is even */
1040                 if (dcb->sync_period & WIDE_SYNC &&
1041                     srb->total_xfer_length % 2) {
1042                         srb->total_xfer_length++;
1043                         sgp->length++;
1044                 }
1045
1046                 srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1047                                                 srb->segment_x,
1048                                                 SEGMENTX_LEN,
1049                                                 PCI_DMA_TODEVICE);
1050
1051                 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1052                         srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1053         } else {
1054                 srb->total_xfer_length = cmd->request_bufflen;
1055                 srb->sg_count = 1;
1056                 srb->segment_x[0].address =
1057                         pci_map_single(dcb->acb->dev, cmd->request_buffer,
1058                                        srb->total_xfer_length, dir);
1059
1060                 /* Fixup for WIDE padding - make sure length is even */
1061                 if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2)
1062                         srb->total_xfer_length++;
1063
1064                 srb->segment_x[0].length = srb->total_xfer_length;
1065
1066                 dprintkdbg(DBG_0,
1067                         "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n",
1068                         srb->total_xfer_length, cmd->request_buffer,
1069                         cmd->use_sg, srb->segment_x[0].address);
1070         }
1071
1072         srb->request_length = srb->total_xfer_length;
1073 }
1074
1075
1076 /**
1077  * dc395x_queue_command - queue scsi command passed from the mid
1078  * layer, invoke 'done' on completion
1079  *
1080  * @cmd: pointer to scsi command object
1081  * @done: function pointer to be invoked on completion
1082  *
1083  * Returns 1 if the adapter (host) is busy, else returns 0. One
1084  * reason for an adapter to be busy is that the number
1085  * of outstanding queued commands is already equal to
1086  * struct Scsi_Host::can_queue .
1087  *
1088  * Required: if struct Scsi_Host::can_queue is ever non-zero
1089  *           then this function is required.
1090  *
1091  * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1092  *        and is expected to be held on return.
1093  *
1094  **/
1095 static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1096 {
1097         struct DeviceCtlBlk *dcb;
1098         struct ScsiReqBlk *srb;
1099         struct AdapterCtlBlk *acb =
1100             (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1101         dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n",
1102                 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
1103
1104         /* Assume BAD_TARGET; will be cleared later */
1105         cmd->result = DID_BAD_TARGET << 16;
1106
1107         /* ignore invalid targets */
1108         if (cmd->device->id >= acb->scsi_host->max_id ||
1109             cmd->device->lun >= acb->scsi_host->max_lun ||
1110             cmd->device->lun >31) {
1111                 goto complete;
1112         }
1113
1114         /* does the specified lun on the specified device exist */
1115         if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1116                 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1117                         cmd->device->id, cmd->device->lun);
1118                 goto complete;
1119         }
1120
1121         /* do we have a DCB for the device */
1122         dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1123         if (!dcb) {
1124                 /* should never happen */
1125                 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1126                         cmd->device->id, cmd->device->lun);
1127                 goto complete;
1128         }
1129
1130         /* set callback and clear result in the command */
1131         cmd->scsi_done = done;
1132         cmd->result = 0;
1133
1134         srb = srb_get_free(acb);
1135         if (!srb)
1136         {
1137                 /*
1138                  * Return 1 since we are unable to queue this command at this
1139                  * point in time.
1140                  */
1141                 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1142                 return 1;
1143         }
1144
1145         build_srb(cmd, dcb, srb);
1146
1147         if (!list_empty(&dcb->srb_waiting_list)) {
1148                 /* append to waiting queue */
1149                 srb_waiting_append(dcb, srb);
1150                 waiting_process_next(acb);
1151         } else {
1152                 /* process immediately */
1153                 send_srb(acb, srb);
1154         }
1155         dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid);
1156         return 0;
1157
1158 complete:
1159         /*
1160          * Complete the command immediatey, and then return 0 to
1161          * indicate that we have handled the command. This is usually
1162          * done when the commad is for things like non existent
1163          * devices.
1164          */
1165         done(cmd);
1166         return 0;
1167 }
1168
1169
1170 /*
1171  * Return the disk geometry for the given SCSI device.
1172  */
1173 static int dc395x_bios_param(struct scsi_device *sdev,
1174                 struct block_device *bdev, sector_t capacity, int *info)
1175 {
1176 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1177         int heads, sectors, cylinders;
1178         struct AdapterCtlBlk *acb;
1179         int size = capacity;
1180
1181         dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1182         acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1183         heads = 64;
1184         sectors = 32;
1185         cylinders = size / (heads * sectors);
1186
1187         if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1188                 heads = 255;
1189                 sectors = 63;
1190                 cylinders = size / (heads * sectors);
1191         }
1192         geom[0] = heads;
1193         geom[1] = sectors;
1194         geom[2] = cylinders;
1195         return 0;
1196 #else
1197         return scsicam_bios_param(bdev, capacity, info);
1198 #endif
1199 }
1200
1201
1202 static void dump_register_info(struct AdapterCtlBlk *acb,
1203                 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1204 {
1205         u16 pstat;
1206         struct pci_dev *dev = acb->dev;
1207         pci_read_config_word(dev, PCI_STATUS, &pstat);
1208         if (!dcb)
1209                 dcb = acb->active_dcb;
1210         if (!srb && dcb)
1211                 srb = dcb->active_srb;
1212         if (srb) {
1213                 if (!srb->cmd)
1214                         dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1215                                 srb, srb->cmd);
1216                 else
1217                         dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) "
1218                                  "cmnd=0x%02x <%02i-%i>\n",
1219                                 srb, srb->cmd, srb->cmd->pid,
1220                                 srb->cmd->cmnd[0], srb->cmd->device->id,
1221                                 srb->cmd->device->lun);
1222                 printk("  sglist=%p cnt=%i idx=%i len=%i\n",
1223                        srb->segment_x, srb->sg_count, srb->sg_index,
1224                        srb->total_xfer_length);
1225                 printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1226                        srb->state, srb->status, srb->scsi_phase,
1227                        (acb->active_dcb) ? "" : "not");
1228         }
1229         dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1230                 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1231                 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1232                 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1233                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1234                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1235                 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1236                 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1237                 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1238                 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1239                 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1240                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1241                 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1242                 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1243                 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1244                 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1245                 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1246         dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1247                 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1248                 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1249                 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1250                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1251                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1252                 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1253                 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1254                 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1255                 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1256                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1257                 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1258                 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1259         dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1260                 "pci{status=0x%04x}\n",
1261                 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1262                 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1263                 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1264                 pstat);
1265 }
1266
1267
1268 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1269 {
1270 #if debug_enabled(DBG_FIFO)
1271         u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1272         u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1273         if (!(fifocnt & 0x40))
1274                 dprintkdbg(DBG_FIFO,
1275                         "clear_fifo: (%i bytes) on phase %02x in %s\n",
1276                         fifocnt & 0x3f, lines, txt);
1277 #endif
1278         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1279 }
1280
1281
1282 static void reset_dev_param(struct AdapterCtlBlk *acb)
1283 {
1284         struct DeviceCtlBlk *dcb;
1285         struct NvRamType *eeprom = &acb->eeprom;
1286         dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1287
1288         list_for_each_entry(dcb, &acb->dcb_list, list) {
1289                 u8 period_index;
1290
1291                 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1292                 dcb->sync_period = 0;
1293                 dcb->sync_offset = 0;
1294
1295                 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1296                 period_index = eeprom->target[dcb->target_id].period & 0x07;
1297                 dcb->min_nego_period = clock_period[period_index];
1298                 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1299                     || !(acb->config & HCC_WIDE_CARD))
1300                         dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1301         }
1302 }
1303
1304
1305 /*
1306  * perform a hard reset on the SCSI bus
1307  * @cmd - some command for this host (for fetching hooks)
1308  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1309  */
1310 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1311 {
1312         struct AdapterCtlBlk *acb =
1313                 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1314         dprintkl(KERN_INFO,
1315                 "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n",
1316                 cmd->pid, cmd->device->id, cmd->device->lun, cmd);
1317
1318         if (timer_pending(&acb->waiting_timer))
1319                 del_timer(&acb->waiting_timer);
1320
1321         /*
1322          * disable interrupt
1323          */
1324         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1325         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1326         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1327         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1328
1329         reset_scsi_bus(acb);
1330         udelay(500);
1331
1332         /* We may be in serious trouble. Wait some seconds */
1333         acb->scsi_host->last_reset =
1334             jiffies + 3 * HZ / 2 +
1335             HZ * acb->eeprom.delay_time;
1336
1337         /*
1338          * re-enable interrupt
1339          */
1340         /* Clear SCSI FIFO          */
1341         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1342         clear_fifo(acb, "eh_bus_reset");
1343         /* Delete pending IRQ */
1344         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1345         set_basic_config(acb);
1346
1347         reset_dev_param(acb);
1348         doing_srb_done(acb, DID_RESET, cmd, 0);
1349         acb->active_dcb = NULL;
1350         acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1351         waiting_process_next(acb);
1352
1353         return SUCCESS;
1354 }
1355
1356 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1357 {
1358         int rc;
1359
1360         spin_lock_irq(cmd->device->host->host_lock);
1361         rc = __dc395x_eh_bus_reset(cmd);
1362         spin_unlock_irq(cmd->device->host->host_lock);
1363
1364         return rc;
1365 }
1366
1367 /*
1368  * abort an errant SCSI command
1369  * @cmd - command to be aborted
1370  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1371  */
1372 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1373 {
1374         /*
1375          * Look into our command queues: If it has not been sent already,
1376          * we remove it and return success. Otherwise fail.
1377          */
1378         struct AdapterCtlBlk *acb =
1379             (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1380         struct DeviceCtlBlk *dcb;
1381         struct ScsiReqBlk *srb;
1382         dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n",
1383                 cmd->pid, cmd->device->id, cmd->device->lun, cmd);
1384
1385         dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1386         if (!dcb) {
1387                 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1388                 return FAILED;
1389         }
1390
1391         srb = find_cmd(cmd, &dcb->srb_waiting_list);
1392         if (srb) {
1393                 srb_waiting_remove(dcb, srb);
1394                 pci_unmap_srb_sense(acb, srb);
1395                 pci_unmap_srb(acb, srb);
1396                 free_tag(dcb, srb);
1397                 srb_free_insert(acb, srb);
1398                 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1399                 cmd->result = DID_ABORT << 16;
1400                 return SUCCESS;
1401         }
1402         srb = find_cmd(cmd, &dcb->srb_going_list);
1403         if (srb) {
1404                 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1405                 /* XXX: Should abort the command here */
1406         } else {
1407                 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1408         }
1409         return FAILED;
1410 }
1411
1412
1413 /* SDTR */
1414 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1415                 struct ScsiReqBlk *srb)
1416 {
1417         u8 *ptr = srb->msgout_buf + srb->msg_count;
1418         if (srb->msg_count > 1) {
1419                 dprintkl(KERN_INFO,
1420                         "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1421                         srb->msg_count, srb->msgout_buf[0],
1422                         srb->msgout_buf[1]);
1423                 return;
1424         }
1425         if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1426                 dcb->sync_offset = 0;
1427                 dcb->min_nego_period = 200 >> 2;
1428         } else if (dcb->sync_offset == 0)
1429                 dcb->sync_offset = SYNC_NEGO_OFFSET;
1430
1431         *ptr++ = MSG_EXTENDED;  /* (01h) */
1432         *ptr++ = 3;             /* length */
1433         *ptr++ = EXTENDED_SDTR; /* (01h) */
1434         *ptr++ = dcb->min_nego_period;  /* Transfer period (in 4ns) */
1435         *ptr++ = dcb->sync_offset;      /* Transfer period (max. REQ/ACK dist) */
1436         srb->msg_count += 5;
1437         srb->state |= SRB_DO_SYNC_NEGO;
1438 }
1439
1440
1441 /* WDTR */
1442 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1443                 struct ScsiReqBlk *srb)
1444 {
1445         u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1446                    (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1447         u8 *ptr = srb->msgout_buf + srb->msg_count;
1448         if (srb->msg_count > 1) {
1449                 dprintkl(KERN_INFO,
1450                         "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1451                         srb->msg_count, srb->msgout_buf[0],
1452                         srb->msgout_buf[1]);
1453                 return;
1454         }
1455         *ptr++ = MSG_EXTENDED;  /* (01h) */
1456         *ptr++ = 2;             /* length */
1457         *ptr++ = EXTENDED_WDTR; /* (03h) */
1458         *ptr++ = wide;
1459         srb->msg_count += 4;
1460         srb->state |= SRB_DO_WIDE_NEGO;
1461 }
1462
1463
1464 #if 0
1465 /* Timer to work around chip flaw: When selecting and the bus is
1466  * busy, we sometimes miss a Selection timeout IRQ */
1467 void selection_timeout_missed(unsigned long ptr);
1468 /* Sets the timer to wake us up */
1469 static void selto_timer(struct AdapterCtlBlk *acb)
1470 {
1471         if (timer_pending(&acb->selto_timer))
1472                 return;
1473         acb->selto_timer.function = selection_timeout_missed;
1474         acb->selto_timer.data = (unsigned long) acb;
1475         if (time_before
1476             (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
1477                 acb->selto_timer.expires =
1478                     acb->scsi_host->last_reset + HZ / 2 + 1;
1479         else
1480                 acb->selto_timer.expires = jiffies + HZ + 1;
1481         add_timer(&acb->selto_timer);
1482 }
1483
1484
1485 void selection_timeout_missed(unsigned long ptr)
1486 {
1487         unsigned long flags;
1488         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1489         struct ScsiReqBlk *srb;
1490         dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1491         if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1492                 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1493                 return;
1494         }
1495         DC395x_LOCK_IO(acb->scsi_host, flags);
1496         srb = acb->active_dcb->active_srb;
1497         disconnect(acb);
1498         DC395x_UNLOCK_IO(acb->scsi_host, flags);
1499 }
1500 #endif
1501
1502
1503 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1504                 struct ScsiReqBlk* srb)
1505 {
1506         u16 s_stat2, return_code;
1507         u8 s_stat, scsicommand, i, identify_message;
1508         u8 *ptr;
1509         dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n",
1510                 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
1511
1512         srb->tag_number = TAG_NONE;     /* acb->tag_max_num: had error read in eeprom */
1513
1514         s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1515         s_stat2 = 0;
1516         s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1517 #if 1
1518         if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1519                 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n",
1520                         srb->cmd->pid, s_stat, s_stat2);
1521                 /*
1522                  * Try anyway?
1523                  *
1524                  * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1525                  * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed!
1526                  * (This is likely to be a bug in the hardware. Obviously, most people
1527                  *  only have one initiator per SCSI bus.)
1528                  * Instead let this fail and have the timer make sure the command is
1529                  * tried again after a short time
1530                  */
1531                 /*selto_timer (acb); */
1532                 return 1;
1533         }
1534 #endif
1535         if (acb->active_dcb) {
1536                 dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a"
1537                         "command while another command (pid#%li) is active.",
1538                         srb->cmd->pid,
1539                         acb->active_dcb->active_srb ?
1540                             acb->active_dcb->active_srb->cmd->pid : 0);
1541                 return 1;
1542         }
1543         if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1544                 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n",
1545                         srb->cmd->pid);
1546                 return 1;
1547         }
1548         /* Allow starting of SCSI commands half a second before we allow the mid-level
1549          * to queue them again after a reset */
1550         if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
1551                 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1552                 return 1;
1553         }
1554
1555         /* Flush FIFO */
1556         clear_fifo(acb, "start_scsi");
1557         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1558         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1559         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1560         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1561         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1562
1563         identify_message = dcb->identify_msg;
1564         /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1565         /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1566         if (srb->flag & AUTO_REQSENSE)
1567                 identify_message &= 0xBF;
1568
1569         if (((srb->cmd->cmnd[0] == INQUIRY)
1570              || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1571              || (srb->flag & AUTO_REQSENSE))
1572             && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1573                  && !(dcb->sync_mode & WIDE_NEGO_DONE))
1574                 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1575                     && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1576             && (dcb->target_lun == 0)) {
1577                 srb->msgout_buf[0] = identify_message;
1578                 srb->msg_count = 1;
1579                 scsicommand = SCMD_SEL_ATNSTOP;
1580                 srb->state = SRB_MSGOUT;
1581 #ifndef SYNC_FIRST
1582                 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1583                     && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1584                         build_wdtr(acb, dcb, srb);
1585                         goto no_cmd;
1586                 }
1587 #endif
1588                 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1589                     && dcb->inquiry7 & SCSI_INQ_SYNC) {
1590                         build_sdtr(acb, dcb, srb);
1591                         goto no_cmd;
1592                 }
1593                 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1594                     && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1595                         build_wdtr(acb, dcb, srb);
1596                         goto no_cmd;
1597                 }
1598                 srb->msg_count = 0;
1599         }
1600         /* Send identify message */
1601         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1602
1603         scsicommand = SCMD_SEL_ATN;
1604         srb->state = SRB_START_;
1605 #ifndef DC395x_NO_TAGQ
1606         if ((dcb->sync_mode & EN_TAG_QUEUEING)
1607             && (identify_message & 0xC0)) {
1608                 /* Send Tag message */
1609                 u32 tag_mask = 1;
1610                 u8 tag_number = 0;
1611                 while (tag_mask & dcb->tag_mask
1612                        && tag_number <= dcb->max_command) {
1613                         tag_mask = tag_mask << 1;
1614                         tag_number++;
1615                 }
1616                 if (tag_number >= dcb->max_command) {
1617                         dprintkl(KERN_WARNING, "start_scsi: (pid#%li) "
1618                                 "Out of tags target=<%02i-%i>)\n",
1619                                 srb->cmd->pid, srb->cmd->device->id,
1620                                 srb->cmd->device->lun);
1621                         srb->state = SRB_READY;
1622                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1623                                        DO_HWRESELECT);
1624                         return 1;
1625                 }
1626                 /* Send Tag id */
1627                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1628                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1629                 dcb->tag_mask |= tag_mask;
1630                 srb->tag_number = tag_number;
1631                 scsicommand = SCMD_SEL_ATN3;
1632                 srb->state = SRB_START_;
1633         }
1634 #endif
1635 /*polling:*/
1636         /* Send CDB ..command block ......... */
1637         dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n",
1638                 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
1639                 srb->cmd->cmnd[0], srb->tag_number);
1640         if (srb->flag & AUTO_REQSENSE) {
1641                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1642                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1643                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1644                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1645                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
1646                               sizeof(srb->cmd->sense_buffer));
1647                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1648         } else {
1649                 ptr = (u8 *)srb->cmd->cmnd;
1650                 for (i = 0; i < srb->cmd->cmd_len; i++)
1651                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1652         }
1653       no_cmd:
1654         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1655                        DO_HWRESELECT | DO_DATALATCH);
1656         if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1657                 /*
1658                  * If start_scsi return 1:
1659                  * we caught an interrupt (must be reset or reselection ... )
1660                  * : Let's process it first!
1661                  */
1662                 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
1663                         srb->cmd->pid, dcb->target_id, dcb->target_lun);
1664                 srb->state = SRB_READY;
1665                 free_tag(dcb, srb);
1666                 srb->msg_count = 0;
1667                 return_code = 1;
1668                 /* This IRQ should NOT get lost, as we did not acknowledge it */
1669         } else {
1670                 /*
1671                  * If start_scsi returns 0:
1672                  * we know that the SCSI processor is free
1673                  */
1674                 srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1675                 dcb->active_srb = srb;
1676                 acb->active_dcb = dcb;
1677                 return_code = 0;
1678                 /* it's important for atn stop */
1679                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1680                                DO_DATALATCH | DO_HWRESELECT);
1681                 /* SCSI command */
1682                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1683         }
1684         return return_code;
1685 }
1686
1687
1688 #define DC395x_ENABLE_MSGOUT \
1689  DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1690  srb->state |= SRB_MSGOUT
1691
1692
1693 /* abort command */
1694 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1695                 struct ScsiReqBlk *srb)
1696 {
1697         srb->msgout_buf[0] = ABORT;
1698         srb->msg_count = 1;
1699         DC395x_ENABLE_MSGOUT;
1700         srb->state &= ~SRB_MSGIN;
1701         srb->state |= SRB_MSGOUT;
1702 }
1703
1704
1705 /**
1706  * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1707  *                           have been triggered for this card.
1708  *
1709  * @acb:         a pointer to the adpter control block
1710  * @scsi_status: the status return when we checked the card
1711  **/
1712 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1713                 u16 scsi_status)
1714 {
1715         struct DeviceCtlBlk *dcb;
1716         struct ScsiReqBlk *srb;
1717         u16 phase;
1718         u8 scsi_intstatus;
1719         unsigned long flags;
1720         void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1721                               u16 *);
1722
1723         DC395x_LOCK_IO(acb->scsi_host, flags);
1724
1725         /* This acknowledges the IRQ */
1726         scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1727         if ((scsi_status & 0x2007) == 0x2002)
1728                 dprintkl(KERN_DEBUG,
1729                         "COP after COP completed? %04x\n", scsi_status);
1730         if (debug_enabled(DBG_KG)) {
1731                 if (scsi_intstatus & INT_SELTIMEOUT)
1732                         dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1733         }
1734         /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1735
1736         if (timer_pending(&acb->selto_timer))
1737                 del_timer(&acb->selto_timer);
1738
1739         if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1740                 disconnect(acb);        /* bus free interrupt  */
1741                 goto out_unlock;
1742         }
1743         if (scsi_intstatus & INT_RESELECTED) {
1744                 reselect(acb);
1745                 goto out_unlock;
1746         }
1747         if (scsi_intstatus & INT_SELECT) {
1748                 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1749                 goto out_unlock;
1750         }
1751         if (scsi_intstatus & INT_SCSIRESET) {
1752                 scsi_reset_detect(acb);
1753                 goto out_unlock;
1754         }
1755         if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1756                 dcb = acb->active_dcb;
1757                 if (!dcb) {
1758                         dprintkl(KERN_DEBUG,
1759                                 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1760                                 scsi_status, scsi_intstatus);
1761                         goto out_unlock;
1762                 }
1763                 srb = dcb->active_srb;
1764                 if (dcb->flag & ABORT_DEV_) {
1765                         dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1766                         enable_msgout_abort(acb, srb);
1767                 }
1768
1769                 /* software sequential machine */
1770                 phase = (u16)srb->scsi_phase;
1771
1772                 /*
1773                  * 62037 or 62137
1774                  * call  dc395x_scsi_phase0[]... "phase entry"
1775                  * handle every phase before start transfer
1776                  */
1777                 /* data_out_phase0,     phase:0 */
1778                 /* data_in_phase0,      phase:1 */
1779                 /* command_phase0,      phase:2 */
1780                 /* status_phase0,       phase:3 */
1781                 /* nop0,                phase:4 PH_BUS_FREE .. initial phase */
1782                 /* nop0,                phase:5 PH_BUS_FREE .. initial phase */
1783                 /* msgout_phase0,       phase:6 */
1784                 /* msgin_phase0,        phase:7 */
1785                 dc395x_statev = dc395x_scsi_phase0[phase];
1786                 dc395x_statev(acb, srb, &scsi_status);
1787
1788                 /*
1789                  * if there were any exception occured scsi_status
1790                  * will be modify to bus free phase new scsi_status
1791                  * transfer out from ... previous dc395x_statev
1792                  */
1793                 srb->scsi_phase = scsi_status & PHASEMASK;
1794                 phase = (u16)scsi_status & PHASEMASK;
1795
1796                 /*
1797                  * call  dc395x_scsi_phase1[]... "phase entry" handle
1798                  * every phase to do transfer
1799                  */
1800                 /* data_out_phase1,     phase:0 */
1801                 /* data_in_phase1,      phase:1 */
1802                 /* command_phase1,      phase:2 */
1803                 /* status_phase1,       phase:3 */
1804                 /* nop1,                phase:4 PH_BUS_FREE .. initial phase */
1805                 /* nop1,                phase:5 PH_BUS_FREE .. initial phase */
1806                 /* msgout_phase1,       phase:6 */
1807                 /* msgin_phase1,        phase:7 */
1808                 dc395x_statev = dc395x_scsi_phase1[phase];
1809                 dc395x_statev(acb, srb, &scsi_status);
1810         }
1811       out_unlock:
1812         DC395x_UNLOCK_IO(acb->scsi_host, flags);
1813 }
1814
1815
1816 static irqreturn_t dc395x_interrupt(int irq, void *dev_id,
1817                 struct pt_regs *regs)
1818 {
1819         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)dev_id;
1820         u16 scsi_status;
1821         u8 dma_status;
1822         irqreturn_t handled = IRQ_NONE;
1823
1824         /*
1825          * Check for pending interupt
1826          */
1827         scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1828         dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1829         if (scsi_status & SCSIINTERRUPT) {
1830                 /* interupt pending - let's process it! */
1831                 dc395x_handle_interrupt(acb, scsi_status);
1832                 handled = IRQ_HANDLED;
1833         }
1834         else if (dma_status & 0x20) {
1835                 /* Error from the DMA engine */
1836                 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1837 #if 0
1838                 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1839                 if (acb->active_dcb) {
1840                         acb->active_dcb-> flag |= ABORT_DEV_;
1841                         if (acb->active_dcb->active_srb)
1842                                 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1843                 }
1844                 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1845 #else
1846                 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1847                 acb = NULL;
1848 #endif
1849                 handled = IRQ_HANDLED;
1850         }
1851
1852         return handled;
1853 }
1854
1855
1856 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1857                 u16 *pscsi_status)
1858 {
1859         dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid);
1860         if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1861                 *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
1862
1863         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
1864         srb->state &= ~SRB_MSGOUT;
1865 }
1866
1867
1868 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1869                 u16 *pscsi_status)
1870 {
1871         u16 i;
1872         u8 *ptr;
1873         dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid);
1874
1875         clear_fifo(acb, "msgout_phase1");
1876         if (!(srb->state & SRB_MSGOUT)) {
1877                 srb->state |= SRB_MSGOUT;
1878                 dprintkl(KERN_DEBUG,
1879                         "msgout_phase1: (pid#%li) Phase unexpected\n",
1880                         srb->cmd->pid); /* So what ? */
1881         }
1882         if (!srb->msg_count) {
1883                 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
1884                         srb->cmd->pid);
1885                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1886                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
1887                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1888                 return;
1889         }
1890         ptr = (u8 *)srb->msgout_buf;
1891         for (i = 0; i < srb->msg_count; i++)
1892                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1893         srb->msg_count = 0;
1894         if (srb->msgout_buf[0] == MSG_ABORT)
1895                 srb->state = SRB_ABORT_SENT;
1896
1897         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1898 }
1899
1900
1901 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1902                 u16 *pscsi_status)
1903 {
1904         dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid);
1905         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1906 }
1907
1908
1909 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1910                 u16 *pscsi_status)
1911 {
1912         struct DeviceCtlBlk *dcb;
1913         u8 *ptr;
1914         u16 i;
1915         dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid);
1916
1917         clear_fifo(acb, "command_phase1");
1918         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1919         if (!(srb->flag & AUTO_REQSENSE)) {
1920                 ptr = (u8 *)srb->cmd->cmnd;
1921                 for (i = 0; i < srb->cmd->cmd_len; i++) {
1922                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1923                         ptr++;
1924                 }
1925         } else {
1926                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1927                 dcb = acb->active_dcb;
1928                 /* target id */
1929                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1930                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1931                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1932                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
1933                               sizeof(srb->cmd->sense_buffer));
1934                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1935         }
1936         srb->state |= SRB_COMMAND;
1937         /* it's important for atn stop */
1938         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1939         /* SCSI command */
1940         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1941 }
1942
1943
1944 /*
1945  * Verify that the remaining space in the hw sg lists is the same as
1946  * the count of remaining bytes in srb->total_xfer_length
1947  */
1948 static void sg_verify_length(struct ScsiReqBlk *srb)
1949 {
1950         if (debug_enabled(DBG_SG)) {
1951                 unsigned len = 0;
1952                 unsigned idx = srb->sg_index;
1953                 struct SGentry *psge = srb->segment_x + idx;
1954                 for (; idx < srb->sg_count; psge++, idx++)
1955                         len += psge->length;
1956                 if (len != srb->total_xfer_length)
1957                         dprintkdbg(DBG_SG,
1958                                "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1959                                srb->total_xfer_length, len);
1960         }
1961 }
1962
1963
1964 /*
1965  * Compute the next Scatter Gather list index and adjust its length
1966  * and address if necessary
1967  */
1968 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1969 {
1970         u8 idx;
1971         u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
1972         struct SGentry *psge = srb->segment_x + srb->sg_index;
1973
1974         dprintkdbg(DBG_0,
1975                 "sg_update_list: Transfered %i of %i bytes, %i remain\n",
1976                 xferred, srb->total_xfer_length, left);
1977         if (xferred == 0) {
1978                 /* nothing to update since we did not transfer any data */
1979                 return;
1980         }
1981
1982         sg_verify_length(srb);
1983         srb->total_xfer_length = left;  /* update remaining count */
1984         for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1985                 if (xferred >= psge->length) {
1986                         /* Complete SG entries done */
1987                         xferred -= psge->length;
1988                 } else {
1989                         /* Partial SG entry done */
1990                         psge->length -= xferred;
1991                         psge->address += xferred;
1992                         srb->sg_index = idx;
1993                         pci_dma_sync_single_for_device(srb->dcb->
1994                                             acb->dev,
1995                                             srb->sg_bus_addr,
1996                                             SEGMENTX_LEN,
1997                                             PCI_DMA_TODEVICE);
1998                         break;
1999                 }
2000                 psge++;
2001         }
2002         sg_verify_length(srb);
2003 }
2004
2005
2006 /*
2007  * We have transfered a single byte (PIO mode?) and need to update
2008  * the count of bytes remaining (total_xfer_length) and update the sg
2009  * entry to either point to next byte in the current sg entry, or of
2010  * already at the end to point to the start of the next sg entry
2011  */
2012 static void sg_subtract_one(struct ScsiReqBlk *srb)
2013 {
2014         sg_update_list(srb, srb->total_xfer_length - 1);
2015 }
2016
2017
2018 /*
2019  * cleanup_after_transfer
2020  *
2021  * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2022  * KG: Currently called from  StatusPhase1 ()
2023  * Should probably also be called from other places
2024  * Best might be to call it in DataXXPhase0, if new phase will differ
2025  */
2026 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2027                 struct ScsiReqBlk *srb)
2028 {
2029         /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2030         if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {       /* read */
2031                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2032                         clear_fifo(acb, "cleanup/in");
2033                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2034                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2035         } else {                /* write */
2036                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2037                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2038                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2039                         clear_fifo(acb, "cleanup/out");
2040         }
2041         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2042 }
2043
2044
2045 /*
2046  * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
2047  * Seems to be needed for unknown reasons; could be a hardware bug :-(
2048  */
2049 #define DC395x_LASTPIO 4
2050
2051
2052 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2053                 u16 *pscsi_status)
2054 {
2055         struct DeviceCtlBlk *dcb = srb->dcb;
2056         u16 scsi_status = *pscsi_status;
2057         u32 d_left_counter = 0;
2058         dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
2059                 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2060
2061         /*
2062          * KG: We need to drain the buffers before we draw any conclusions!
2063          * This means telling the DMA to push the rest into SCSI, telling
2064          * SCSI to push the rest to the bus.
2065          * However, the device might have been the one to stop us (phase
2066          * change), and the data in transit just needs to be accounted so
2067          * it can be retransmitted.)
2068          */
2069         /*
2070          * KG: Stop DMA engine pushing more data into the SCSI FIFO
2071          * If we need more data, the DMA SG list will be freshly set up, anyway
2072          */
2073         dprintkdbg(DBG_PIO, "data_out_phase0: "
2074                 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2075                 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2076                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2077                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2078                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2079                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2080                 srb->total_xfer_length);
2081         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2082
2083         if (!(srb->state & SRB_XFERPAD)) {
2084                 if (scsi_status & PARITYERROR)
2085                         srb->status |= PARITY_ERROR;
2086
2087                 /*
2088                  * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2089                  * is the no of bytes it got from the DMA engine not the no it
2090                  * transferred successfully to the device. (And the difference could
2091                  * be as much as the FIFO size, I guess ...)
2092                  */
2093                 if (!(scsi_status & SCSIXFERDONE)) {
2094                         /*
2095                          * when data transfer from DMA FIFO to SCSI FIFO
2096                          * if there was some data left in SCSI FIFO
2097                          */
2098                         d_left_counter =
2099                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2100                                   0x1F);
2101                         if (dcb->sync_period & WIDE_SYNC)
2102                                 d_left_counter <<= 1;
2103
2104                         dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2105                                 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2106                                 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2107                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2108                                 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2109                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2110                                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2111                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2112                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2113                                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2114                 }
2115                 /*
2116                  * calculate all the residue data that not yet tranfered
2117                  * SCSI transfer counter + left in SCSI FIFO data
2118                  *
2119                  * .....TRM_S1040_SCSI_COUNTER (24bits)
2120                  * The counter always decrement by one for every SCSI byte transfer.
2121                  * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2122                  * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2123                  */
2124                 if (srb->total_xfer_length > DC395x_LASTPIO)
2125                         d_left_counter +=
2126                             DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2127
2128                 /* Is this a good idea? */
2129                 /*clear_fifo(acb, "DOP1"); */
2130                 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2131                 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2132                     && srb->cmd->request_bufflen % 2) {
2133                         d_left_counter = 0;
2134                         dprintkl(KERN_INFO,
2135                                 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2136                                 scsi_status);
2137                 }
2138                 /*
2139                  * KG: Oops again. Same thinko as above: The SCSI might have been
2140                  * faster than the DMA engine, so that it ran out of data.
2141                  * In that case, we have to do just nothing!
2142                  * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2143                  */
2144                 /*
2145                  * KG: This is nonsense: We have been WRITING data to the bus
2146                  * If the SCSI engine has no bytes left, how should the DMA engine?
2147                  */
2148                 if (d_left_counter == 0) {
2149                         srb->total_xfer_length = 0;
2150                 } else {
2151                         /*
2152                          * if transfer not yet complete
2153                          * there were some data residue in SCSI FIFO or
2154                          * SCSI transfer counter not empty
2155                          */
2156                         long oldxferred =
2157                             srb->total_xfer_length - d_left_counter;
2158                         const int diff =
2159                             (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2160                         sg_update_list(srb, d_left_counter);
2161                         /* KG: Most ugly hack! Apparently, this works around a chip bug */
2162                         if ((srb->segment_x[srb->sg_index].length ==
2163                              diff && srb->cmd->use_sg)
2164                             || ((oldxferred & ~PAGE_MASK) ==
2165                                 (PAGE_SIZE - diff))
2166                             ) {
2167                                 dprintkl(KERN_INFO, "data_out_phase0: "
2168                                         "Work around chip bug (%i)?\n", diff);
2169                                 d_left_counter =
2170                                     srb->total_xfer_length - diff;
2171                                 sg_update_list(srb, d_left_counter);
2172                                 /*srb->total_xfer_length -= diff; */
2173                                 /*srb->virt_addr += diff; */
2174                                 /*if (srb->cmd->use_sg) */
2175                                 /*      srb->sg_index++; */
2176                         }
2177                 }
2178         }
2179         if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2180                 cleanup_after_transfer(acb, srb);
2181         }
2182 }
2183
2184
2185 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2186                 u16 *pscsi_status)
2187 {
2188         dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
2189                 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2190         clear_fifo(acb, "data_out_phase1");
2191         /* do prepare before transfer when data out phase */
2192         data_io_transfer(acb, srb, XFERDATAOUT);
2193 }
2194
2195 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2196                 u16 *pscsi_status)
2197 {
2198         u16 scsi_status = *pscsi_status;
2199
2200         dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
2201                 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2202
2203         /*
2204          * KG: DataIn is much more tricky than DataOut. When the device is finished
2205          * and switches to another phase, the SCSI engine should be finished too.
2206          * But: There might still be bytes left in its FIFO to be fetched by the DMA
2207          * engine and transferred to memory.
2208          * We should wait for the FIFOs to be emptied by that (is there any way to
2209          * enforce this?) and then stop the DMA engine, because it might think, that
2210          * there are more bytes to follow. Yes, the device might disconnect prior to
2211          * having all bytes transferred!
2212          * Also we should make sure that all data from the DMA engine buffer's really
2213          * made its way to the system memory! Some documentation on this would not
2214          * seem to be a bad idea, actually.
2215          */
2216         if (!(srb->state & SRB_XFERPAD)) {
2217                 u32 d_left_counter;
2218                 unsigned int sc, fc;
2219
2220                 if (scsi_status & PARITYERROR) {
2221                         dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
2222                                 "Parity Error\n", srb->cmd->pid);
2223                         srb->status |= PARITY_ERROR;
2224                 }
2225                 /*
2226                  * KG: We should wait for the DMA FIFO to be empty ...
2227                  * but: it would be better to wait first for the SCSI FIFO and then the
2228                  * the DMA FIFO to become empty? How do we know, that the device not already
2229                  * sent data to the FIFO in a MsgIn phase, eg.?
2230                  */
2231                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2232 #if 0
2233                         int ctr = 6000000;
2234                         dprintkl(KERN_DEBUG,
2235                                 "DIP0: Wait for DMA FIFO to flush ...\n");
2236                         /*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2237                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2238                         /*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2239                         while (!
2240                                (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2241                                 0x80) && --ctr);
2242                         if (ctr < 6000000 - 1)
2243                                 dprintkl(KERN_DEBUG
2244                                        "DIP0: Had to wait for DMA ...\n");
2245                         if (!ctr)
2246                                 dprintkl(KERN_ERR,
2247                                        "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2248                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2249 #endif
2250                         dprintkdbg(DBG_KG, "data_in_phase0: "
2251                                 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2252                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2253                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2254                 }
2255                 /* Now: Check remainig data: The SCSI counters should tell us ... */
2256                 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2257                 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2258                 d_left_counter = sc + ((fc & 0x1f)
2259                        << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2260                            0));
2261                 dprintkdbg(DBG_KG, "data_in_phase0: "
2262                         "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2263                         "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2264                         "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2265                         fc,
2266                         (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2267                         sc,
2268                         fc,
2269                         DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2270                         DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2271                         srb->total_xfer_length, d_left_counter);
2272 #if DC395x_LASTPIO
2273                 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
2274                 if (d_left_counter
2275                     && srb->total_xfer_length <= DC395x_LASTPIO) {
2276                         size_t left_io = srb->total_xfer_length;
2277
2278                         /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2279                         /*sg_update_list (srb, d_left_counter); */
2280                         dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2281                                    "for remaining %i bytes:",
2282                                 fc & 0x1f,
2283                                 (srb->dcb->sync_period & WIDE_SYNC) ?
2284                                     "words" : "bytes",
2285                                 srb->total_xfer_length);
2286                         if (srb->dcb->sync_period & WIDE_SYNC)
2287                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2288                                               CFG2_WIDEFIFO);
2289                         while (left_io) {
2290                                 unsigned char *virt, *base = NULL;
2291                                 unsigned long flags = 0;
2292                                 size_t len = left_io;
2293
2294                                 if (srb->cmd->use_sg) {
2295                                         size_t offset = srb->request_length - left_io;
2296                                         local_irq_save(flags);
2297                                         /* Assumption: it's inside one page as it's at most 4 bytes and
2298                                            I just assume it's on a 4-byte boundary */
2299                                         base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
2300                                                                      srb->sg_count, &offset, &len);
2301                                         virt = base + offset;
2302                                 } else {
2303                                         virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
2304                                         len = left_io;
2305                                 }
2306                                 left_io -= len;
2307
2308                                 while (len) {
2309                                         u8 byte;
2310                                         byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2311                                         *virt++ = byte;
2312
2313                                         if (debug_enabled(DBG_PIO))
2314                                                 printk(" %02x", byte);
2315
2316                                         d_left_counter--;
2317                                         sg_subtract_one(srb);
2318
2319                                         len--;
2320
2321                                         fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2322
2323                                         if (fc == 0x40) {
2324                                                 left_io = 0;
2325                                                 break;
2326                                         }
2327                                 }
2328
2329                                 WARN_ON((fc != 0x40) == !d_left_counter);
2330
2331                                 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2332                                         /* Read the last byte ... */
2333                                         if (srb->total_xfer_length > 0) {
2334                                                 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2335
2336                                                 *virt++ = byte;
2337                                                 srb->total_xfer_length--;
2338                                                 if (debug_enabled(DBG_PIO))
2339                                                         printk(" %02x", byte);
2340                                         }
2341
2342                                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2343                                 }
2344
2345                                 if (srb->cmd->use_sg) {
2346                                         scsi_kunmap_atomic_sg(base);
2347                                         local_irq_restore(flags);
2348                                 }
2349                         }
2350                         /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2351                         /*srb->total_xfer_length = 0; */
2352                         if (debug_enabled(DBG_PIO))
2353                                 printk("\n");
2354                 }
2355 #endif                          /* DC395x_LASTPIO */
2356
2357 #if 0
2358                 /*
2359                  * KG: This was in DATAOUT. Does it also belong here?
2360                  * Nobody seems to know what counter and fifo_cnt count exactly ...
2361                  */
2362                 if (!(scsi_status & SCSIXFERDONE)) {
2363                         /*
2364                          * when data transfer from DMA FIFO to SCSI FIFO
2365                          * if there was some data left in SCSI FIFO
2366                          */
2367                         d_left_counter =
2368                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2369                                   0x1F);
2370                         if (srb->dcb->sync_period & WIDE_SYNC)
2371                                 d_left_counter <<= 1;
2372                         /*
2373                          * if WIDE scsi SCSI FIFOCNT unit is word !!!
2374                          * so need to *= 2
2375                          * KG: Seems to be correct ...
2376                          */
2377                 }
2378 #endif
2379                 /* KG: This should not be needed any more! */
2380                 if (d_left_counter == 0
2381                     || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2382 #if 0
2383                         int ctr = 6000000;
2384                         u8 TempDMAstatus;
2385                         do {
2386                                 TempDMAstatus =
2387                                     DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2388                         } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2389                         if (!ctr)
2390                                 dprintkl(KERN_ERR,
2391                                        "Deadlock in DataInPhase0 waiting for DMA!!\n");
2392                         srb->total_xfer_length = 0;
2393 #endif
2394                         srb->total_xfer_length = d_left_counter;
2395                 } else {        /* phase changed */
2396                         /*
2397                          * parsing the case:
2398                          * when a transfer not yet complete
2399                          * but be disconnected by target
2400                          * if transfer not yet complete
2401                          * there were some data residue in SCSI FIFO or
2402                          * SCSI transfer counter not empty
2403                          */
2404                         sg_update_list(srb, d_left_counter);
2405                 }
2406         }
2407         /* KG: The target may decide to disconnect: Empty FIFO before! */
2408         if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2409                 cleanup_after_transfer(acb, srb);
2410         }
2411 }
2412
2413
2414 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2415                 u16 *pscsi_status)
2416 {
2417         dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
2418                 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2419         data_io_transfer(acb, srb, XFERDATAIN);
2420 }
2421
2422
2423 static void data_io_transfer(struct AdapterCtlBlk *acb,
2424                 struct ScsiReqBlk *srb, u16 io_dir)
2425 {
2426         struct DeviceCtlBlk *dcb = srb->dcb;
2427         u8 bval;
2428         dprintkdbg(DBG_0,
2429                 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2430                 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
2431                 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2432                 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2433         if (srb == acb->tmp_srb)
2434                 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2435         if (srb->sg_index >= srb->sg_count) {
2436                 /* can't happen? out of bounds error */
2437                 return;
2438         }
2439
2440         if (srb->total_xfer_length > DC395x_LASTPIO) {
2441                 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2442                 /*
2443                  * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2444                  * Maybe, even ABORTXFER would be appropriate
2445                  */
2446                 if (dma_status & XFERPENDING) {
2447                         dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2448                                 "Expect trouble!\n");
2449                         dump_register_info(acb, dcb, srb);
2450                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2451                 }
2452                 /* clear_fifo(acb, "IO"); */
2453                 /*
2454                  * load what physical address of Scatter/Gather list table
2455                  * want to be transfer
2456                  */
2457                 srb->state |= SRB_DATA_XFER;
2458                 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2459                 if (srb->cmd->use_sg) { /* with S/G */
2460                         io_dir |= DMACMD_SG;
2461                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2462                                        srb->sg_bus_addr +
2463                                        sizeof(struct SGentry) *
2464                                        srb->sg_index);
2465                         /* load how many bytes in the sg list table */
2466                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2467                                        ((u32)(srb->sg_count -
2468                                               srb->sg_index) << 3));
2469                 } else {        /* without S/G */
2470                         io_dir &= ~DMACMD_SG;
2471                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2472                                        srb->segment_x[0].address);
2473                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2474                                        srb->segment_x[0].length);
2475                 }
2476                 /* load total transfer length (24bits) max value 16Mbyte */
2477                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2478                                srb->total_xfer_length);
2479                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2480                 if (io_dir & DMACMD_DIR) {      /* read */
2481                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2482                                       SCMD_DMA_IN);
2483                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2484                 } else {
2485                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2486                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2487                                       SCMD_DMA_OUT);
2488                 }
2489
2490         }
2491 #if DC395x_LASTPIO
2492         else if (srb->total_xfer_length > 0) {  /* The last four bytes: Do PIO */
2493                 /*
2494                  * load what physical address of Scatter/Gather list table
2495                  * want to be transfer
2496                  */
2497                 srb->state |= SRB_DATA_XFER;
2498                 /* load total transfer length (24bits) max value 16Mbyte */
2499                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2500                                srb->total_xfer_length);
2501                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2502                 if (io_dir & DMACMD_DIR) {      /* read */
2503                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2504                                       SCMD_FIFO_IN);
2505                 } else {        /* write */
2506                         int ln = srb->total_xfer_length;
2507                         size_t left_io = srb->total_xfer_length;
2508
2509                         if (srb->dcb->sync_period & WIDE_SYNC)
2510                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2511                                      CFG2_WIDEFIFO);
2512
2513                         while (left_io) {
2514                                 unsigned char *virt, *base = NULL;
2515                                 unsigned long flags = 0;
2516                                 size_t len = left_io;
2517
2518                                 if (srb->cmd->use_sg) {
2519                                         size_t offset = srb->request_length - left_io;
2520                                         local_irq_save(flags);
2521                                         /* Again, max 4 bytes */
2522                                         base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
2523                                                                      srb->sg_count, &offset, &len);
2524                                         virt = base + offset;
2525                                 } else {
2526                                         virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
2527                                         len = left_io;
2528                                 }
2529                                 left_io -= len;
2530
2531                                 while (len--) {
2532                                         if (debug_enabled(DBG_PIO))
2533                                                 printk(" %02x", *virt);
2534
2535                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2536
2537                                         sg_subtract_one(srb);
2538                                 }
2539
2540                                 if (srb->cmd->use_sg) {
2541                                         scsi_kunmap_atomic_sg(base);
2542                                         local_irq_restore(flags);
2543                                 }
2544                         }
2545                         if (srb->dcb->sync_period & WIDE_SYNC) {
2546                                 if (ln % 2) {
2547                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2548                                         if (debug_enabled(DBG_PIO))
2549                                                 printk(" |00");
2550                                 }
2551                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2552                         }
2553                         /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2554                         if (debug_enabled(DBG_PIO))
2555                                 printk("\n");
2556                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2557                                           SCMD_FIFO_OUT);
2558                 }
2559         }
2560 #endif                          /* DC395x_LASTPIO */
2561         else {          /* xfer pad */
2562                 u8 data = 0, data2 = 0;
2563                 if (srb->sg_count) {
2564                         srb->adapter_status = H_OVER_UNDER_RUN;
2565                         srb->status |= OVER_RUN;
2566                 }
2567                 /*
2568                  * KG: despite the fact that we are using 16 bits I/O ops
2569                  * the SCSI FIFO is only 8 bits according to the docs
2570                  * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2571                  */
2572                 if (dcb->sync_period & WIDE_SYNC) {
2573                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2574                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2575                                       CFG2_WIDEFIFO);
2576                         if (io_dir & DMACMD_DIR) {
2577                                 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2578                                 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2579                         } else {
2580                                 /* Danger, Robinson: If you find KGs
2581                                  * scattered over the wide disk, the driver
2582                                  * or chip is to blame :-( */
2583                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2584                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2585                         }
2586                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2587                 } else {
2588                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2589                         /* Danger, Robinson: If you find a collection of Ks on your disk
2590                          * something broke :-( */
2591                         if (io_dir & DMACMD_DIR)
2592                                 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2593                         else
2594                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2595                 }
2596                 srb->state |= SRB_XFERPAD;
2597                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2598                 /* SCSI command */
2599                 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2600                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2601         }
2602 }
2603
2604
2605 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2606                 u16 *pscsi_status)
2607 {
2608         dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
2609                 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2610         srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2611         srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);      /* get message */
2612         srb->state = SRB_COMPLETED;
2613         *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
2614         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2615         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2616 }
2617
2618
2619 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2620                 u16 *pscsi_status)
2621 {
2622         dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
2623                 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
2624         srb->state = SRB_STATUS;
2625         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2626         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2627 }
2628
2629
2630 /* Check if the message is complete */
2631 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2632 {
2633         if (*msgbuf == EXTENDED_MESSAGE) {
2634                 if (len < 2)
2635                         return 0;
2636                 if (len < msgbuf[1] + 2)
2637                         return 0;
2638         } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)  /* two byte messages */
2639                 if (len < 2)
2640                         return 0;
2641         return 1;
2642 }
2643
2644 /* reject_msg */
2645 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2646                 struct ScsiReqBlk *srb)
2647 {
2648         srb->msgout_buf[0] = MESSAGE_REJECT;
2649         srb->msg_count = 1;
2650         DC395x_ENABLE_MSGOUT;
2651         srb->state &= ~SRB_MSGIN;
2652         srb->state |= SRB_MSGOUT;
2653         dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2654                 srb->msgin_buf[0],
2655                 srb->dcb->target_id, srb->dcb->target_lun);
2656 }
2657
2658
2659 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2660                 struct DeviceCtlBlk *dcb, u8 tag)
2661 {
2662         struct ScsiReqBlk *srb = NULL;
2663         struct ScsiReqBlk *i;
2664         dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
2665                    srb->cmd->pid, tag, srb);
2666
2667         if (!(dcb->tag_mask & (1 << tag)))
2668                 dprintkl(KERN_DEBUG,
2669                         "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2670                         dcb->tag_mask, tag);
2671
2672         if (list_empty(&dcb->srb_going_list))
2673                 goto mingx0;
2674         list_for_each_entry(i, &dcb->srb_going_list, list) {
2675                 if (i->tag_number == tag) {
2676                         srb = i;
2677                         break;
2678                 }
2679         }
2680         if (!srb)
2681                 goto mingx0;
2682
2683         dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
2684                 srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun);
2685         if (dcb->flag & ABORT_DEV_) {
2686                 /*srb->state = SRB_ABORT_SENT; */
2687                 enable_msgout_abort(acb, srb);
2688         }
2689
2690         if (!(srb->state & SRB_DISCONNECT))
2691                 goto mingx0;
2692
2693         memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2694         srb->state |= dcb->active_srb->state;
2695         srb->state |= SRB_DATA_XFER;
2696         dcb->active_srb = srb;
2697         /* How can we make the DORS happy? */
2698         return srb;
2699
2700       mingx0:
2701         srb = acb->tmp_srb;
2702         srb->state = SRB_UNEXPECT_RESEL;
2703         dcb->active_srb = srb;
2704         srb->msgout_buf[0] = MSG_ABORT_TAG;
2705         srb->msg_count = 1;
2706         DC395x_ENABLE_MSGOUT;
2707         dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2708         return srb;
2709 }
2710
2711
2712 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2713                 struct DeviceCtlBlk *dcb)
2714 {
2715         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2716         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2717         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2718         set_xfer_rate(acb, dcb);
2719 }
2720
2721
2722 /* set async transfer mode */
2723 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2724 {
2725         struct DeviceCtlBlk *dcb = srb->dcb;
2726         dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2727                 dcb->target_id, dcb->target_lun);
2728
2729         dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2730         dcb->sync_mode |= SYNC_NEGO_DONE;
2731         /*dcb->sync_period &= 0; */
2732         dcb->sync_offset = 0;
2733         dcb->min_nego_period = 200 >> 2;        /* 200ns <=> 5 MHz */
2734         srb->state &= ~SRB_DO_SYNC_NEGO;
2735         reprogram_regs(acb, dcb);
2736         if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2737             && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2738                 build_wdtr(acb, dcb, srb);
2739                 DC395x_ENABLE_MSGOUT;
2740                 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2741         }
2742 }
2743
2744
2745 /* set sync transfer mode */
2746 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2747 {
2748         struct DeviceCtlBlk *dcb = srb->dcb;
2749         u8 bval;
2750         int fact;
2751         dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2752                 "(%02i.%01i MHz) Offset %i\n",
2753                 dcb->target_id, srb->msgin_buf[3] << 2,
2754                 (250 / srb->msgin_buf[3]),
2755                 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2756                 srb->msgin_buf[4]);
2757
2758         if (srb->msgin_buf[4] > 15)
2759                 srb->msgin_buf[4] = 15;
2760         if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2761                 dcb->sync_offset = 0;
2762         else if (dcb->sync_offset == 0)
2763                 dcb->sync_offset = srb->msgin_buf[4];
2764         if (srb->msgin_buf[4] > dcb->sync_offset)
2765                 srb->msgin_buf[4] = dcb->sync_offset;
2766         else
2767                 dcb->sync_offset = srb->msgin_buf[4];
2768         bval = 0;
2769         while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2770                             || dcb->min_nego_period >
2771                             clock_period[bval]))
2772                 bval++;
2773         if (srb->msgin_buf[3] < clock_period[bval])
2774                 dprintkl(KERN_INFO,
2775                         "msgin_set_sync: Increase sync nego period to %ins\n",
2776                         clock_period[bval] << 2);
2777         srb->msgin_buf[3] = clock_period[bval];
2778         dcb->sync_period &= 0xf0;
2779         dcb->sync_period |= ALT_SYNC | bval;
2780         dcb->min_nego_period = srb->msgin_buf[3];
2781
2782         if (dcb->sync_period & WIDE_SYNC)
2783                 fact = 500;
2784         else
2785                 fact = 250;
2786
2787         dprintkl(KERN_INFO,
2788                 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2789                 dcb->target_id, (fact == 500) ? "Wide16" : "",
2790                 dcb->min_nego_period << 2, dcb->sync_offset,
2791                 (fact / dcb->min_nego_period),
2792                 ((fact % dcb->min_nego_period) * 10 +
2793                 dcb->min_nego_period / 2) / dcb->min_nego_period);
2794
2795         if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2796                 /* Reply with corrected SDTR Message */
2797                 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2798                         srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2799
2800                 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2801                 srb->msg_count = 5;
2802                 DC395x_ENABLE_MSGOUT;
2803                 dcb->sync_mode |= SYNC_NEGO_DONE;
2804         } else {
2805                 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2806                     && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2807                         build_wdtr(acb, dcb, srb);
2808                         DC395x_ENABLE_MSGOUT;
2809                         dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2810                 }
2811         }
2812         srb->state &= ~SRB_DO_SYNC_NEGO;
2813         dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2814
2815         reprogram_regs(acb, dcb);
2816 }
2817
2818
2819 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2820                 struct ScsiReqBlk *srb)
2821 {
2822         struct DeviceCtlBlk *dcb = srb->dcb;
2823         dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2824
2825         dcb->sync_period &= ~WIDE_SYNC;
2826         dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2827         dcb->sync_mode |= WIDE_NEGO_DONE;
2828         srb->state &= ~SRB_DO_WIDE_NEGO;
2829         reprogram_regs(acb, dcb);
2830         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2831             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2832                 build_sdtr(acb, dcb, srb);
2833                 DC395x_ENABLE_MSGOUT;
2834                 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2835         }
2836 }
2837
2838 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2839 {
2840         struct DeviceCtlBlk *dcb = srb->dcb;
2841         u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2842                    && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2843         dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2844
2845         if (srb->msgin_buf[3] > wide)
2846                 srb->msgin_buf[3] = wide;
2847         /* Completed */
2848         if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2849                 dprintkl(KERN_DEBUG,
2850                         "msgin_set_wide: Wide nego initiated <%02i>\n",
2851                         dcb->target_id);
2852                 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2853                 srb->msg_count = 4;
2854                 srb->state |= SRB_DO_WIDE_NEGO;
2855                 DC395x_ENABLE_MSGOUT;
2856         }
2857
2858         dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2859         if (srb->msgin_buf[3] > 0)
2860                 dcb->sync_period |= WIDE_SYNC;
2861         else
2862                 dcb->sync_period &= ~WIDE_SYNC;
2863         srb->state &= ~SRB_DO_WIDE_NEGO;
2864         /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2865         dprintkdbg(DBG_1,
2866                 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2867                 (8 << srb->msgin_buf[3]), dcb->target_id);
2868         reprogram_regs(acb, dcb);
2869         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2870             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2871                 build_sdtr(acb, dcb, srb);
2872                 DC395x_ENABLE_MSGOUT;
2873                 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2874         }
2875 }
2876
2877
2878 /*
2879  * extended message codes:
2880  *
2881  *      code    description
2882  *
2883  *      02h     Reserved
2884  *      00h     MODIFY DATA  POINTER
2885  *      01h     SYNCHRONOUS DATA TRANSFER REQUEST
2886  *      03h     WIDE DATA TRANSFER REQUEST
2887  *   04h - 7Fh  Reserved
2888  *   80h - FFh  Vendor specific
2889  */
2890 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2891                 u16 *pscsi_status)
2892 {
2893         struct DeviceCtlBlk *dcb = acb->active_dcb;
2894         dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid);
2895
2896         srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2897         if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2898                 /* Now eval the msg */
2899                 switch (srb->msgin_buf[0]) {
2900                 case DISCONNECT:
2901                         srb->state = SRB_DISCONNECT;
2902                         break;
2903
2904                 case SIMPLE_QUEUE_TAG:
2905                 case HEAD_OF_QUEUE_TAG:
2906                 case ORDERED_QUEUE_TAG:
2907                         srb =
2908                             msgin_qtag(acb, dcb,
2909                                               srb->msgin_buf[1]);
2910                         break;
2911
2912                 case MESSAGE_REJECT:
2913                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2914                                        DO_CLRATN | DO_DATALATCH);
2915                         /* A sync nego message was rejected ! */
2916                         if (srb->state & SRB_DO_SYNC_NEGO) {
2917                                 msgin_set_async(acb, srb);
2918                                 break;
2919                         }
2920                         /* A wide nego message was rejected ! */
2921                         if (srb->state & SRB_DO_WIDE_NEGO) {
2922                                 msgin_set_nowide(acb, srb);
2923                                 break;
2924                         }
2925                         enable_msgout_abort(acb, srb);
2926                         /*srb->state |= SRB_ABORT_SENT */
2927                         break;
2928
2929                 case EXTENDED_MESSAGE:
2930                         /* SDTR */
2931                         if (srb->msgin_buf[1] == 3
2932                             && srb->msgin_buf[2] == EXTENDED_SDTR) {
2933                                 msgin_set_sync(acb, srb);
2934                                 break;
2935                         }
2936                         /* WDTR */
2937                         if (srb->msgin_buf[1] == 2
2938                             && srb->msgin_buf[2] == EXTENDED_WDTR
2939                             && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2940                                 msgin_set_wide(acb, srb);
2941                                 break;
2942                         }
2943                         msgin_reject(acb, srb);
2944                         break;
2945
2946                 case MSG_IGNOREWIDE:
2947                         /* Discard  wide residual */
2948                         dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2949                         break;
2950
2951                 case COMMAND_COMPLETE:
2952                         /* nothing has to be done */
2953                         break;
2954
2955                 case SAVE_POINTERS:
2956                         /*
2957                          * SAVE POINTER may be ignored as we have the struct
2958                          * ScsiReqBlk* associated with the scsi command.
2959                          */
2960                         dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2961                                 "SAVE POINTER rem=%i Ignore\n",
2962                                 srb->cmd->pid, srb->total_xfer_length);
2963                         break;
2964
2965                 case RESTORE_POINTERS:
2966                         dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2967                         break;
2968
2969                 case ABORT:
2970                         dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2971                                 "<%02i-%i> ABORT msg\n",
2972                                 srb->cmd->pid, dcb->target_id,
2973                                 dcb->target_lun);
2974                         dcb->flag |= ABORT_DEV_;
2975                         enable_msgout_abort(acb, srb);
2976                         break;
2977
2978                 default:
2979                         /* reject unknown messages */
2980                         if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2981                                 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2982                                 srb->msg_count = 1;
2983                                 srb->msgout_buf[0] = dcb->identify_msg;
2984                                 DC395x_ENABLE_MSGOUT;
2985                                 srb->state |= SRB_MSGOUT;
2986                                 /*break; */
2987                         }
2988                         msgin_reject(acb, srb);
2989                 }
2990
2991                 /* Clear counter and MsgIn state */
2992                 srb->state &= ~SRB_MSGIN;
2993                 acb->msg_len = 0;
2994         }
2995         *pscsi_status = PH_BUS_FREE;
2996         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important ... you know! */
2997         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2998 }
2999
3000
3001 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3002                 u16 *pscsi_status)
3003 {
3004         dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid);
3005         clear_fifo(acb, "msgin_phase1");
3006         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
3007         if (!(srb->state & SRB_MSGIN)) {
3008                 srb->state &= ~SRB_DISCONNECT;
3009                 srb->state |= SRB_MSGIN;
3010         }
3011         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3012         /* SCSI command */
3013         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
3014 }
3015
3016
3017 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3018                 u16 *pscsi_status)
3019 {
3020 }
3021
3022
3023 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3024                 u16 *pscsi_status)
3025 {
3026 }
3027
3028
3029 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3030 {
3031         struct DeviceCtlBlk *i;
3032
3033         /* set all lun device's  period, offset */
3034         if (dcb->identify_msg & 0x07)
3035                 return;
3036
3037         if (acb->scan_devices) {
3038                 current_sync_offset = dcb->sync_offset;
3039                 return;
3040         }
3041
3042         list_for_each_entry(i, &acb->dcb_list, list)
3043                 if (i->target_id == dcb->target_id) {
3044                         i->sync_period = dcb->sync_period;
3045                         i->sync_offset = dcb->sync_offset;
3046                         i->sync_mode = dcb->sync_mode;
3047                         i->min_nego_period = dcb->min_nego_period;
3048                 }
3049 }
3050
3051
3052 static void disconnect(struct AdapterCtlBlk *acb)
3053 {
3054         struct DeviceCtlBlk *dcb = acb->active_dcb;
3055         struct ScsiReqBlk *srb;
3056
3057         if (!dcb) {
3058                 dprintkl(KERN_ERR, "disconnect: No such device\n");
3059                 udelay(500);
3060                 /* Suspend queue for a while */
3061                 acb->scsi_host->last_reset =
3062                     jiffies + HZ / 2 +
3063                     HZ * acb->eeprom.delay_time;
3064                 clear_fifo(acb, "disconnectEx");
3065                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3066                 return;
3067         }
3068         srb = dcb->active_srb;
3069         acb->active_dcb = NULL;
3070         dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid);
3071
3072         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
3073         clear_fifo(acb, "disconnect");
3074         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3075         if (srb->state & SRB_UNEXPECT_RESEL) {
3076                 dprintkl(KERN_ERR,
3077                         "disconnect: Unexpected reselection <%02i-%i>\n",
3078                         dcb->target_id, dcb->target_lun);
3079                 srb->state = 0;
3080                 waiting_process_next(acb);
3081         } else if (srb->state & SRB_ABORT_SENT) {
3082                 dcb->flag &= ~ABORT_DEV_;
3083                 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3084                 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3085                 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3086                 waiting_process_next(acb);
3087         } else {
3088                 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3089                     || !(srb->
3090                          state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3091                         /*
3092                          * Selection time out
3093                          * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3094                          */
3095                         /* Unexp. Disc / Sel Timeout */
3096                         if (srb->state != SRB_START_
3097                             && srb->state != SRB_MSGOUT) {
3098                                 srb->state = SRB_READY;
3099                                 dprintkl(KERN_DEBUG,
3100                                         "disconnect: (pid#%li) Unexpected\n",
3101                                         srb->cmd->pid);
3102                                 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3103                                 goto disc1;
3104                         } else {
3105                                 /* Normal selection timeout */
3106                                 dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
3107                                         "<%02i-%i> SelTO\n", srb->cmd->pid,
3108                                         dcb->target_id, dcb->target_lun);
3109                                 if (srb->retry_count++ > DC395x_MAX_RETRIES
3110                                     || acb->scan_devices) {
3111                                         srb->target_status =
3112                                             SCSI_STAT_SEL_TIMEOUT;
3113                                         goto disc1;
3114                                 }
3115                                 free_tag(dcb, srb);
3116                                 srb_going_to_waiting_move(dcb, srb);
3117                                 dprintkdbg(DBG_KG,
3118                                         "disconnect: (pid#%li) Retry\n",
3119                                         srb->cmd->pid);
3120                                 waiting_set_timer(acb, HZ / 20);
3121                         }
3122                 } else if (srb->state & SRB_DISCONNECT) {
3123                         u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3124                         /*
3125                          * SRB_DISCONNECT (This is what we expect!)
3126                          */
3127                         if (bval & 0x40) {
3128                                 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3129                                         " 0x%02x: ACK set! Other controllers?\n",
3130                                         bval);
3131                                 /* It could come from another initiator, therefore don't do much ! */
3132                         } else
3133                                 waiting_process_next(acb);
3134                 } else if (srb->state & SRB_COMPLETED) {
3135                       disc1:
3136                         /*
3137                          ** SRB_COMPLETED
3138                          */
3139                         free_tag(dcb, srb);
3140                         dcb->active_srb = NULL;
3141                         srb->state = SRB_FREE;
3142                         srb_done(acb, dcb, srb);
3143                 }
3144         }
3145 }
3146
3147
3148 static void reselect(struct AdapterCtlBlk *acb)
3149 {
3150         struct DeviceCtlBlk *dcb = acb->active_dcb;
3151         struct ScsiReqBlk *srb = NULL;
3152         u16 rsel_tar_lun_id;
3153         u8 id, lun;
3154         u8 arblostflag = 0;
3155         dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3156
3157         clear_fifo(acb, "reselect");
3158         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3159         /* Read Reselected Target ID and LUN */
3160         rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3161         if (dcb) {              /* Arbitration lost but Reselection win */
3162                 srb = dcb->active_srb;
3163                 if (!srb) {
3164                         dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3165                                 "but active_srb == NULL\n");
3166                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3167                         return;
3168                 }
3169                 /* Why the if ? */
3170                 if (!acb->scan_devices) {
3171                         dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
3172                                 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3173                                 srb->cmd->pid, dcb->target_id,
3174                                 dcb->target_lun, rsel_tar_lun_id,
3175                                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3176                         arblostflag = 1;
3177                         /*srb->state |= SRB_DISCONNECT; */
3178
3179                         srb->state = SRB_READY;
3180                         free_tag(dcb, srb);
3181                         srb_going_to_waiting_move(dcb, srb);
3182                         waiting_set_timer(acb, HZ / 20);
3183
3184                         /* return; */
3185                 }
3186         }
3187         /* Read Reselected Target Id and LUN */
3188         if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3189                 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3190                         "Got %i!\n", rsel_tar_lun_id);
3191         id = rsel_tar_lun_id & 0xff;
3192         lun = (rsel_tar_lun_id >> 8) & 7;
3193         dcb = find_dcb(acb, id, lun);
3194         if (!dcb) {
3195                 dprintkl(KERN_ERR, "reselect: From non existent device "
3196                         "<%02i-%i>\n", id, lun);
3197                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3198                 return;
3199         }
3200         acb->active_dcb = dcb;
3201
3202         if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3203                 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3204                         "disconnection? <%02i-%i>\n",
3205                         dcb->target_id, dcb->target_lun);
3206
3207         if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3208                 srb = acb->tmp_srb;
3209                 dcb->active_srb = srb;
3210         } else {
3211                 /* There can be only one! */
3212                 srb = dcb->active_srb;
3213                 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3214                         /*
3215                          * abort command
3216                          */
3217                         dprintkl(KERN_DEBUG,
3218                                 "reselect: w/o disconnected cmds <%02i-%i>\n",
3219                                 dcb->target_id, dcb->target_lun);
3220                         srb = acb->tmp_srb;
3221                         srb->state = SRB_UNEXPECT_RESEL;
3222                         dcb->active_srb = srb;
3223                         enable_msgout_abort(acb, srb);
3224                 } else {
3225                         if (dcb->flag & ABORT_DEV_) {
3226                                 /*srb->state = SRB_ABORT_SENT; */
3227                                 enable_msgout_abort(acb, srb);
3228                         } else
3229                                 srb->state = SRB_DATA_XFER;
3230
3231                 }
3232         }
3233         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
3234
3235         /* Program HA ID, target ID, period and offset */
3236         dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3237         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);     /* host   ID */
3238         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);            /* target ID */
3239         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);            /* offset    */
3240         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);              /* sync period, wide */
3241         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);              /* it's important for atn stop */
3242         /* SCSI command */
3243         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3244 }
3245
3246
3247 static inline u8 tagq_blacklist(char *name)
3248 {
3249 #ifndef DC395x_NO_TAGQ
3250 #if 0
3251         u8 i;
3252         for (i = 0; i < BADDEVCNT; i++)
3253                 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3254                         return 1;
3255 #endif
3256         return 0;
3257 #else
3258         return 1;
3259 #endif
3260 }
3261
3262
3263 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3264 {
3265         /* Check for SCSI format (ANSI and Response data format) */
3266         if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3267                 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3268                     && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3269                     /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3270                     /* ((dcb->dev_type == TYPE_DISK)
3271                        || (dcb->dev_type == TYPE_MOD)) && */
3272                     !tagq_blacklist(((char *)ptr) + 8)) {
3273                         if (dcb->max_command == 1)
3274                                 dcb->max_command =
3275                                     dcb->acb->tag_max_num;
3276                         dcb->sync_mode |= EN_TAG_QUEUEING;
3277                         /*dcb->tag_mask = 0; */
3278                 } else
3279                         dcb->max_command = 1;
3280         }
3281 }
3282
3283
3284 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3285                 struct ScsiInqData *ptr)
3286 {
3287         u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3288         dcb->dev_type = bval1;
3289         /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3290         disc_tagq_set(dcb, ptr);
3291 }
3292
3293
3294 /* unmap mapped pci regions from SRB */
3295 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3296 {
3297         struct scsi_cmnd *cmd = srb->cmd;
3298         enum dma_data_direction dir = cmd->sc_data_direction;
3299         if (cmd->use_sg && dir != PCI_DMA_NONE) {
3300                 /* unmap DC395x SG list */
3301                 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3302                         srb->sg_bus_addr, SEGMENTX_LEN);
3303                 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3304                                  SEGMENTX_LEN,
3305                                  PCI_DMA_TODEVICE);
3306                 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3307                         cmd->use_sg, cmd->request_buffer);
3308                 /* unmap the sg segments */
3309                 pci_unmap_sg(acb->dev,
3310                              (struct scatterlist *)cmd->request_buffer,
3311                              cmd->use_sg, dir);
3312         } else if (cmd->request_buffer && dir != PCI_DMA_NONE) {
3313                 dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n",
3314                         srb->segment_x[0].address, cmd->request_bufflen);
3315                 pci_unmap_single(acb->dev, srb->segment_x[0].address,
3316                                  cmd->request_bufflen, dir);
3317         }
3318 }
3319
3320
3321 /* unmap mapped pci sense buffer from SRB */
3322 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3323                 struct ScsiReqBlk *srb)
3324 {
3325         if (!(srb->flag & AUTO_REQSENSE))
3326                 return;
3327         /* Unmap sense buffer */
3328         dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3329                srb->segment_x[0].address);
3330         pci_unmap_single(acb->dev, srb->segment_x[0].address,
3331                          srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3332         /* Restore SG stuff */
3333         srb->total_xfer_length = srb->xferred;
3334         srb->segment_x[0].address =
3335             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3336         srb->segment_x[0].length =
3337             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3338 }
3339
3340
3341 /*
3342  * Complete execution of a SCSI command
3343  * Signal completion to the generic SCSI driver
3344  */
3345 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3346                 struct ScsiReqBlk *srb)
3347 {
3348         u8 tempcnt, status;
3349         struct scsi_cmnd *cmd = srb->cmd;
3350         struct ScsiInqData *ptr;
3351         enum dma_data_direction dir = cmd->sc_data_direction;
3352
3353         if (cmd->use_sg) {
3354                 struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer;
3355                 ptr = (struct ScsiInqData *)(page_address(sg->page) + sg->offset);
3356         } else {
3357                 ptr = (struct ScsiInqData *)(cmd->request_buffer);
3358         }
3359
3360         dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid,
3361                 srb->cmd->device->id, srb->cmd->device->lun);
3362         dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p addr=%p\n",
3363                 srb, cmd->use_sg, srb->sg_index, srb->sg_count,
3364                 cmd->request_buffer, ptr);
3365         status = srb->target_status;
3366         if (srb->flag & AUTO_REQSENSE) {
3367                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3368                 pci_unmap_srb_sense(acb, srb);
3369                 /*
3370                  ** target status..........................
3371                  */
3372                 srb->flag &= ~AUTO_REQSENSE;
3373                 srb->adapter_status = 0;
3374                 srb->target_status = CHECK_CONDITION << 1;
3375                 if (debug_enabled(DBG_1)) {
3376                         switch (cmd->sense_buffer[2] & 0x0f) {
3377                         case NOT_READY:
3378                                 dprintkl(KERN_DEBUG,
3379                                      "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3380                                      cmd->cmnd[0], dcb->target_id,
3381                                      dcb->target_lun, status, acb->scan_devices);
3382                                 break;
3383                         case UNIT_ATTENTION:
3384                                 dprintkl(KERN_DEBUG,
3385                                      "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3386                                      cmd->cmnd[0], dcb->target_id,
3387                                      dcb->target_lun, status, acb->scan_devices);
3388                                 break;
3389                         case ILLEGAL_REQUEST:
3390                                 dprintkl(KERN_DEBUG,
3391                                      "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3392                                      cmd->cmnd[0], dcb->target_id,
3393                                      dcb->target_lun, status, acb->scan_devices);
3394                                 break;
3395                         case MEDIUM_ERROR:
3396                                 dprintkl(KERN_DEBUG,
3397                                      "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3398                                      cmd->cmnd[0], dcb->target_id,
3399                                      dcb->target_lun, status, acb->scan_devices);
3400                                 break;
3401                         case HARDWARE_ERROR:
3402                                 dprintkl(KERN_DEBUG,
3403                                      "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3404                                      cmd->cmnd[0], dcb->target_id,
3405                                      dcb->target_lun, status, acb->scan_devices);
3406                                 break;
3407                         }
3408                         if (cmd->sense_buffer[7] >= 6)
3409                                 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3410                                         "(0x%08x 0x%08x)\n",
3411                                         cmd->sense_buffer[2], cmd->sense_buffer[12],
3412                                         cmd->sense_buffer[13],
3413                                         *((unsigned int *)(cmd->sense_buffer + 3)),
3414                                         *((unsigned int *)(cmd->sense_buffer + 8)));
3415                         else
3416                                 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3417                                         cmd->sense_buffer[2],
3418                                         *((unsigned int *)(cmd->sense_buffer + 3)));
3419                 }
3420
3421                 if (status == (CHECK_CONDITION << 1)) {
3422                         cmd->result = DID_BAD_TARGET << 16;
3423                         goto ckc_e;
3424                 }
3425                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3426
3427                 if (srb->total_xfer_length
3428                     && srb->total_xfer_length >= cmd->underflow)
3429                         cmd->result =
3430                             MK_RES_LNX(DRIVER_SENSE, DID_OK,
3431                                        srb->end_message, CHECK_CONDITION);
3432                 /*SET_RES_DID(cmd->result,DID_OK) */
3433                 else
3434                         cmd->result =
3435                             MK_RES_LNX(DRIVER_SENSE, DID_OK,
3436                                        srb->end_message, CHECK_CONDITION);
3437
3438                 goto ckc_e;
3439         }
3440
3441 /*************************************************************/
3442         if (status) {
3443                 /*
3444                  * target status..........................
3445                  */
3446                 if (status_byte(status) == CHECK_CONDITION) {
3447                         request_sense(acb, dcb, srb);
3448                         return;
3449                 } else if (status_byte(status) == QUEUE_FULL) {
3450                         tempcnt = (u8)list_size(&dcb->srb_going_list);
3451                         dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3452                              dcb->target_id, dcb->target_lun, tempcnt);
3453                         if (tempcnt > 1)
3454                                 tempcnt--;
3455                         dcb->max_command = tempcnt;
3456                         free_tag(dcb, srb);
3457                         srb_going_to_waiting_move(dcb, srb);
3458                         waiting_set_timer(acb, HZ / 20);
3459                         srb->adapter_status = 0;
3460                         srb->target_status = 0;
3461                         return;
3462                 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3463                         srb->adapter_status = H_SEL_TIMEOUT;
3464                         srb->target_status = 0;
3465                         cmd->result = DID_NO_CONNECT << 16;
3466                 } else {
3467                         srb->adapter_status = 0;
3468                         SET_RES_DID(cmd->result, DID_ERROR);
3469                         SET_RES_MSG(cmd->result, srb->end_message);
3470                         SET_RES_TARGET(cmd->result, status);
3471
3472                 }
3473         } else {
3474                 /*
3475                  ** process initiator status..........................
3476                  */
3477                 status = srb->adapter_status;
3478                 if (status & H_OVER_UNDER_RUN) {
3479                         srb->target_status = 0;
3480                         SET_RES_DID(cmd->result, DID_OK);
3481                         SET_RES_MSG(cmd->result, srb->end_message);
3482                 } else if (srb->status & PARITY_ERROR) {
3483                         SET_RES_DID(cmd->result, DID_PARITY);
3484                         SET_RES_MSG(cmd->result, srb->end_message);
3485                 } else {        /* No error */
3486
3487                         srb->adapter_status = 0;
3488                         srb->target_status = 0;
3489                         SET_RES_DID(cmd->result, DID_OK);
3490                 }
3491         }
3492
3493         if (dir != PCI_DMA_NONE) {
3494                 if (cmd->use_sg)
3495                         pci_dma_sync_sg_for_cpu(acb->dev,
3496                                         (struct scatterlist *)cmd->
3497                                         request_buffer, cmd->use_sg, dir);
3498                 else if (cmd->request_buffer)
3499                         pci_dma_sync_single_for_cpu(acb->dev,
3500                                             srb->segment_x[0].address,
3501                                             cmd->request_bufflen, dir);
3502         }
3503
3504         if ((cmd->result & RES_DID) == 0 && cmd->cmnd[0] == INQUIRY
3505             && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8
3506             && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3507                 dcb->inquiry7 = ptr->Flags;
3508 /* Check Error Conditions */
3509       ckc_e:
3510
3511         /*if( srb->cmd->cmnd[0] == INQUIRY && */
3512         /*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3513         if (cmd->cmnd[0] == INQUIRY && (cmd->result == (DID_OK << 16)
3514                                          || status_byte(cmd->
3515                                                         result) &
3516                                          CHECK_CONDITION)) {
3517
3518                 if (!dcb->init_tcq_flag) {
3519                         add_dev(acb, dcb, ptr);
3520                         dcb->init_tcq_flag = 1;
3521                 }
3522
3523         }
3524
3525
3526         /* Here is the info for Doug Gilbert's sg3 ... */
3527         cmd->resid = srb->total_xfer_length;
3528         /* This may be interpreted by sb. or not ... */
3529         cmd->SCp.this_residual = srb->total_xfer_length;
3530         cmd->SCp.buffers_residual = 0;
3531         if (debug_enabled(DBG_KG)) {
3532                 if (srb->total_xfer_length)
3533                         dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
3534                                 "cmnd=0x%02x Missed %i bytes\n",
3535                                 cmd->pid, cmd->device->id, cmd->device->lun,
3536                                 cmd->cmnd[0], srb->total_xfer_length);
3537         }
3538
3539         srb_going_remove(dcb, srb);
3540         /* Add to free list */
3541         if (srb == acb->tmp_srb)
3542                 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3543         else {
3544                 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
3545                         cmd->pid, cmd->result);
3546                 srb_free_insert(acb, srb);
3547         }
3548         pci_unmap_srb(acb, srb);
3549
3550         cmd->scsi_done(cmd);
3551         waiting_process_next(acb);
3552 }
3553
3554
3555 /* abort all cmds in our queues */
3556 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3557                 struct scsi_cmnd *cmd, u8 force)
3558 {
3559         struct DeviceCtlBlk *dcb;
3560         dprintkl(KERN_INFO, "doing_srb_done: pids ");
3561
3562         list_for_each_entry(dcb, &acb->dcb_list, list) {
3563                 struct ScsiReqBlk *srb;
3564                 struct ScsiReqBlk *tmp;
3565                 struct scsi_cmnd *p;
3566
3567                 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3568                         enum dma_data_direction dir;
3569                         int result;
3570
3571                         p = srb->cmd;
3572                         dir = p->sc_data_direction;
3573                         result = MK_RES(0, did_flag, 0, 0);
3574                         printk("G:%li(%02i-%i) ", p->pid,
3575                                p->device->id, p->device->lun);
3576                         srb_going_remove(dcb, srb);
3577                         free_tag(dcb, srb);
3578                         srb_free_insert(acb, srb);
3579                         p->result = result;
3580                         pci_unmap_srb_sense(acb, srb);
3581                         pci_unmap_srb(acb, srb);
3582                         if (force) {
3583                                 /* For new EH, we normally don't need to give commands back,
3584                                  * as they all complete or all time out */
3585                                 p->scsi_done(p);
3586                         }
3587                 }
3588                 if (!list_empty(&dcb->srb_going_list))
3589                         dprintkl(KERN_DEBUG,
3590                                "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3591                                dcb->target_id, dcb->target_lun);
3592                 if (dcb->tag_mask)
3593                         dprintkl(KERN_DEBUG,
3594                                "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3595                                dcb->target_id, dcb->target_lun,
3596                                dcb->tag_mask);
3597
3598                 /* Waiting queue */
3599                 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3600                         int result;
3601                         p = srb->cmd;
3602
3603                         result = MK_RES(0, did_flag, 0, 0);
3604                         printk("W:%li<%02i-%i>", p->pid, p->device->id,
3605                                p->device->lun);
3606                         srb_waiting_remove(dcb, srb);
3607                         srb_free_insert(acb, srb);
3608                         p->result = result;
3609                         pci_unmap_srb_sense(acb, srb);
3610                         pci_unmap_srb(acb, srb);
3611                         if (force) {
3612                                 /* For new EH, we normally don't need to give commands back,
3613                                  * as they all complete or all time out */
3614                                 cmd->scsi_done(cmd);
3615                         }
3616                 }
3617                 if (!list_empty(&dcb->srb_waiting_list))
3618                         dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3619                              list_size(&dcb->srb_waiting_list), dcb->target_id,
3620                              dcb->target_lun);
3621                 dcb->flag &= ~ABORT_DEV_;
3622         }
3623         printk("\n");
3624 }
3625
3626
3627 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3628 {
3629         dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3630         acb->acb_flag |= RESET_DEV;     /* RESET_DETECT, RESET_DONE, RESET_DEV */
3631         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3632
3633         while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3634                 /* nothing */;
3635 }
3636
3637
3638 static void set_basic_config(struct AdapterCtlBlk *acb)
3639 {
3640         u8 bval;
3641         u16 wval;
3642         DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3643         if (acb->config & HCC_PARITY)
3644                 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3645         else
3646                 bval = PHASELATCH | INITIATOR | BLOCKRST;
3647
3648         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3649
3650         /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3651         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);       /* was 0x13: default */
3652         /* program Host ID                  */
3653         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3654         /* set ansynchronous transfer       */
3655         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3656         /* Turn LED control off */
3657         wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3658         DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3659         /* DMA config          */
3660         wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3661         wval |=
3662             DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3663         DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3664         /* Clear pending interrupt status */
3665         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3666         /* Enable SCSI interrupt    */
3667         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3668         DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3669                       /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3670                       );
3671 }
3672
3673
3674 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3675 {
3676         dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3677         /* delay half a second */
3678         if (timer_pending(&acb->waiting_timer))
3679                 del_timer(&acb->waiting_timer);
3680
3681         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3682         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3683         /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3684         udelay(500);
3685         /* Maybe we locked up the bus? Then lets wait even longer ... */
3686         acb->scsi_host->last_reset =
3687             jiffies + 5 * HZ / 2 +
3688             HZ * acb->eeprom.delay_time;
3689
3690         clear_fifo(acb, "scsi_reset_detect");
3691         set_basic_config(acb);
3692         /*1.25 */
3693         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3694
3695         if (acb->acb_flag & RESET_DEV) {        /* RESET_DETECT, RESET_DONE, RESET_DEV */
3696                 acb->acb_flag |= RESET_DONE;
3697         } else {
3698                 acb->acb_flag |= RESET_DETECT;
3699                 reset_dev_param(acb);
3700                 doing_srb_done(acb, DID_RESET, NULL, 1);
3701                 /*DC395x_RecoverSRB( acb ); */
3702                 acb->active_dcb = NULL;
3703                 acb->acb_flag = 0;
3704                 waiting_process_next(acb);
3705         }
3706 }
3707
3708
3709 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3710                 struct ScsiReqBlk *srb)
3711 {
3712         struct scsi_cmnd *cmd = srb->cmd;
3713         dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
3714                 cmd->pid, cmd->device->id, cmd->device->lun);
3715
3716         srb->flag |= AUTO_REQSENSE;
3717         srb->adapter_status = 0;
3718         srb->target_status = 0;
3719
3720         /* KG: Can this prevent crap sense data ? */
3721         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
3722
3723         /* Save some data */
3724         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3725             srb->segment_x[0].address;
3726         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3727             srb->segment_x[0].length;
3728         srb->xferred = srb->total_xfer_length;
3729         /* srb->segment_x : a one entry of S/G list table */
3730         srb->total_xfer_length = sizeof(cmd->sense_buffer);
3731         srb->segment_x[0].length = sizeof(cmd->sense_buffer);
3732         /* Map sense buffer */
3733         srb->segment_x[0].address =
3734             pci_map_single(acb->dev, cmd->sense_buffer,
3735                            sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE);
3736         dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3737                cmd->sense_buffer, srb->segment_x[0].address,
3738                sizeof(cmd->sense_buffer));
3739         srb->sg_count = 1;
3740         srb->sg_index = 0;
3741
3742         if (start_scsi(acb, dcb, srb)) {        /* Should only happen, if sb. else grabs the bus */
3743                 dprintkl(KERN_DEBUG,
3744                         "request_sense: (pid#%li) failed <%02i-%i>\n",
3745                         srb->cmd->pid, dcb->target_id, dcb->target_lun);
3746                 srb_going_to_waiting_move(dcb, srb);
3747                 waiting_set_timer(acb, HZ / 100);
3748         }
3749 }
3750
3751
3752 /**
3753  * device_alloc - Allocate a new device instance. This create the
3754  * devices instance and sets up all the data items. The adapter
3755  * instance is required to obtain confiuration information for this
3756  * device. This does *not* add this device to the adapters device
3757  * list.
3758  *
3759  * @acb: The adapter to obtain configuration information from.
3760  * @target: The target for the new device.
3761  * @lun: The lun for the new device.
3762  *
3763  * Return the new device if succesfull or NULL on failure.
3764  **/
3765 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3766                 u8 target, u8 lun)
3767 {
3768         struct NvRamType *eeprom = &acb->eeprom;
3769         u8 period_index = eeprom->target[target].period & 0x07;
3770         struct DeviceCtlBlk *dcb;
3771
3772         dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3773         dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3774         if (!dcb)
3775                 return NULL;
3776         dcb->acb = NULL;
3777         INIT_LIST_HEAD(&dcb->srb_going_list);
3778         INIT_LIST_HEAD(&dcb->srb_waiting_list);
3779         dcb->active_srb = NULL;
3780         dcb->tag_mask = 0;
3781         dcb->max_command = 1;
3782         dcb->target_id = target;
3783         dcb->target_lun = lun;
3784 #ifndef DC395x_NO_DISCONNECT
3785         dcb->identify_msg =
3786             IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3787 #else
3788         dcb->identify_msg = IDENTIFY(0, lun);
3789 #endif
3790         dcb->dev_mode = eeprom->target[target].cfg0;
3791         dcb->inquiry7 = 0;
3792         dcb->sync_mode = 0;
3793         dcb->min_nego_period = clock_period[period_index];
3794         dcb->sync_period = 0;
3795         dcb->sync_offset = 0;
3796         dcb->flag = 0;
3797
3798 #ifndef DC395x_NO_WIDE
3799         if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3800             && (acb->config & HCC_WIDE_CARD))
3801                 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3802 #endif
3803 #ifndef DC395x_NO_SYNC
3804         if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3805                 if (!(lun) || current_sync_offset)
3806                         dcb->sync_mode |= SYNC_NEGO_ENABLE;
3807 #endif
3808         if (dcb->target_lun != 0) {
3809                 /* Copy settings */
3810                 struct DeviceCtlBlk *p;
3811                 list_for_each_entry(p, &acb->dcb_list, list)
3812                         if (p->target_id == dcb->target_id)
3813                                 break;
3814                 dprintkdbg(DBG_1,
3815                        "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3816                        dcb->target_id, dcb->target_lun,
3817                        p->target_id, p->target_lun);
3818                 dcb->sync_mode = p->sync_mode;
3819                 dcb->sync_period = p->sync_period;
3820                 dcb->min_nego_period = p->min_nego_period;
3821                 dcb->sync_offset = p->sync_offset;
3822                 dcb->inquiry7 = p->inquiry7;
3823         }
3824         return dcb;
3825 }
3826
3827
3828 /**
3829  * adapter_add_device - Adds the device instance to the adaptor instance.
3830  *
3831  * @acb: The adapter device to be updated
3832  * @dcb: A newly created and intialised device instance to add.
3833  **/
3834 static void adapter_add_device(struct AdapterCtlBlk *acb,
3835                 struct DeviceCtlBlk *dcb)
3836 {
3837         /* backpointer to adapter */
3838         dcb->acb = acb;
3839
3840         /* set run_robin to this device if it is currently empty */
3841         if (list_empty(&acb->dcb_list))
3842                 acb->dcb_run_robin = dcb;
3843
3844         /* add device to list */
3845         list_add_tail(&dcb->list, &acb->dcb_list);
3846
3847         /* update device maps */
3848         acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3849         acb->children[dcb->target_id][dcb->target_lun] = dcb;
3850 }
3851
3852
3853 /**
3854  * adapter_remove_device - Removes the device instance from the adaptor
3855  * instance. The device instance is not check in any way or freed by this.
3856  * The caller is expected to take care of that. This will simply remove the
3857  * device from the adapters data strcutures.
3858  *
3859  * @acb: The adapter device to be updated
3860  * @dcb: A device that has previously been added to the adapter.
3861  **/
3862 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3863                 struct DeviceCtlBlk *dcb)
3864 {
3865         struct DeviceCtlBlk *i;
3866         struct DeviceCtlBlk *tmp;
3867         dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3868                 dcb->target_id, dcb->target_lun);
3869
3870         /* fix up any pointers to this device that we have in the adapter */
3871         if (acb->active_dcb == dcb)
3872                 acb->active_dcb = NULL;
3873         if (acb->dcb_run_robin == dcb)
3874                 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3875
3876         /* unlink from list */
3877         list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3878                 if (dcb == i) {
3879                         list_del(&i->list);
3880                         break;
3881                 }
3882
3883         /* clear map and children */
3884         acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3885         acb->children[dcb->target_id][dcb->target_lun] = NULL;
3886         dcb->acb = NULL;
3887 }
3888
3889
3890 /**
3891  * adapter_remove_and_free_device - Removes a single device from the adapter
3892  * and then frees the device information.
3893  *
3894  * @acb: The adapter device to be updated
3895  * @dcb: A device that has previously been added to the adapter.
3896  */
3897 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3898                 struct DeviceCtlBlk *dcb)
3899 {
3900         if (list_size(&dcb->srb_going_list) > 1) {
3901                 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3902                            "Won't remove because of %i active requests.\n",
3903                            dcb->target_id, dcb->target_lun,
3904                            list_size(&dcb->srb_going_list));
3905                 return;
3906         }
3907         adapter_remove_device(acb, dcb);
3908         kfree(dcb);
3909 }
3910
3911
3912 /**
3913  * adapter_remove_and_free_all_devices - Removes and frees all of the
3914  * devices associated with the specified adapter.
3915  *
3916  * @acb: The adapter from which all devices should be removed.
3917  **/
3918 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3919 {
3920         struct DeviceCtlBlk *dcb;
3921         struct DeviceCtlBlk *tmp;
3922         dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3923                    list_size(&acb->dcb_list));
3924
3925         list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3926                 adapter_remove_and_free_device(acb, dcb);
3927 }
3928
3929
3930 /**
3931  * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3932  * scsi device that we need to deal with. We allocate a new device and then
3933  * insert that device into the adapters device list.
3934  *
3935  * @scsi_device: The new scsi device that we need to handle.
3936  **/
3937 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3938 {
3939         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3940         struct DeviceCtlBlk *dcb;
3941
3942         dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3943         if (!dcb)
3944                 return -ENOMEM;
3945         adapter_add_device(acb, dcb);
3946
3947         return 0;
3948 }
3949
3950
3951 /**
3952  * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3953  * device that is going away.
3954  *
3955  * @scsi_device: The new scsi device that we need to handle.
3956  **/
3957 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3958 {
3959         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3960         struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3961         if (dcb)
3962                 adapter_remove_and_free_device(acb, dcb);
3963 }
3964
3965
3966
3967
3968 /**
3969  * trms1040_wait_30us: wait for 30 us
3970  *
3971  * Waits for 30us (using the chip by the looks of it..)
3972  *
3973  * @io_port: base I/O address
3974  **/
3975 static void __devinit trms1040_wait_30us(unsigned long io_port)
3976 {
3977         /* ScsiPortStallExecution(30); wait 30 us */
3978         outb(5, io_port + TRM_S1040_GEN_TIMER);
3979         while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3980                 /* nothing */ ;
3981 }
3982
3983
3984 /**
3985  * trms1040_write_cmd - write the secified command and address to
3986  * chip
3987  *
3988  * @io_port:    base I/O address
3989  * @cmd:        SB + op code (command) to send
3990  * @addr:       address to send
3991  **/
3992 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3993 {
3994         int i;
3995         u8 send_data;
3996
3997         /* program SB + OP code */
3998         for (i = 0; i < 3; i++, cmd <<= 1) {
3999                 send_data = NVR_SELECT;
4000                 if (cmd & 0x04) /* Start from bit 2 */
4001                         send_data |= NVR_BITOUT;
4002
4003                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4004                 trms1040_wait_30us(io_port);
4005                 outb((send_data | NVR_CLOCK),
4006                      io_port + TRM_S1040_GEN_NVRAM);
4007                 trms1040_wait_30us(io_port);
4008         }
4009
4010         /* send address */
4011         for (i = 0; i < 7; i++, addr <<= 1) {
4012                 send_data = NVR_SELECT;
4013                 if (addr & 0x40)        /* Start from bit 6 */
4014                         send_data |= NVR_BITOUT;
4015
4016                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4017                 trms1040_wait_30us(io_port);
4018                 outb((send_data | NVR_CLOCK),
4019                      io_port + TRM_S1040_GEN_NVRAM);
4020                 trms1040_wait_30us(io_port);
4021         }
4022         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4023         trms1040_wait_30us(io_port);
4024 }
4025
4026
4027 /**
4028  * trms1040_set_data - store a single byte in the eeprom
4029  *
4030  * Called from write all to write a single byte into the SSEEPROM
4031  * Which is done one bit at a time.
4032  *
4033  * @io_port:    base I/O address
4034  * @addr:       offset into EEPROM
4035  * @byte:       bytes to write
4036  **/
4037 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4038 {
4039         int i;
4040         u8 send_data;
4041
4042         /* Send write command & address */
4043         trms1040_write_cmd(io_port, 0x05, addr);
4044
4045         /* Write data */
4046         for (i = 0; i < 8; i++, byte <<= 1) {
4047                 send_data = NVR_SELECT;
4048                 if (byte & 0x80)        /* Start from bit 7 */
4049                         send_data |= NVR_BITOUT;
4050
4051                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4052                 trms1040_wait_30us(io_port);
4053                 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4054                 trms1040_wait_30us(io_port);
4055         }
4056         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4057         trms1040_wait_30us(io_port);
4058
4059         /* Disable chip select */
4060         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4061         trms1040_wait_30us(io_port);
4062
4063         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4064         trms1040_wait_30us(io_port);
4065
4066         /* Wait for write ready */
4067         while (1) {
4068                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4069                 trms1040_wait_30us(io_port);
4070
4071                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4072                 trms1040_wait_30us(io_port);
4073
4074                 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4075                         break;
4076         }
4077
4078         /*  Disable chip select */
4079         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4080 }
4081
4082
4083 /**
4084  * trms1040_write_all - write 128 bytes to the eeprom
4085  *
4086  * Write the supplied 128 bytes to the chips SEEPROM
4087  *
4088  * @eeprom:     the data to write
4089  * @io_port:    the base io port
4090  **/
4091 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4092 {
4093         u8 *b_eeprom = (u8 *)eeprom;
4094         u8 addr;
4095
4096         /* Enable SEEPROM */
4097         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4098              io_port + TRM_S1040_GEN_CONTROL);
4099
4100         /* write enable */
4101         trms1040_write_cmd(io_port, 0x04, 0xFF);
4102         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4103         trms1040_wait_30us(io_port);
4104
4105         /* write */
4106         for (addr = 0; addr < 128; addr++, b_eeprom++)
4107                 trms1040_set_data(io_port, addr, *b_eeprom);
4108
4109         /* write disable */
4110         trms1040_write_cmd(io_port, 0x04, 0x00);
4111         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4112         trms1040_wait_30us(io_port);
4113
4114         /* Disable SEEPROM */
4115         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4116              io_port + TRM_S1040_GEN_CONTROL);
4117 }
4118
4119
4120 /**
4121  * trms1040_get_data - get a single byte from the eeprom
4122  *
4123  * Called from read all to read a single byte into the SSEEPROM
4124  * Which is done one bit at a time.
4125  *
4126  * @io_port:    base I/O address
4127  * @addr:       offset into SEEPROM
4128  *
4129  * Returns the the byte read.
4130  **/
4131 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4132 {
4133         int i;
4134         u8 read_byte;
4135         u8 result = 0;
4136
4137         /* Send read command & address */
4138         trms1040_write_cmd(io_port, 0x06, addr);
4139
4140         /* read data */
4141         for (i = 0; i < 8; i++) {
4142                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4143                 trms1040_wait_30us(io_port);
4144                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4145
4146                 /* Get data bit while falling edge */
4147                 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4148                 result <<= 1;
4149                 if (read_byte & NVR_BITIN)
4150                         result |= 1;
4151
4152                 trms1040_wait_30us(io_port);
4153         }
4154
4155         /* Disable chip select */
4156         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4157         return result;
4158 }
4159
4160
4161 /**
4162  * trms1040_read_all - read all bytes from the eeprom
4163  *
4164  * Read the 128 bytes from the SEEPROM.
4165  *
4166  * @eeprom:     where to store the data
4167  * @io_port:    the base io port
4168  **/
4169 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4170 {
4171         u8 *b_eeprom = (u8 *)eeprom;
4172         u8 addr;
4173
4174         /* Enable SEEPROM */
4175         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4176              io_port + TRM_S1040_GEN_CONTROL);
4177
4178         /* read details */
4179         for (addr = 0; addr < 128; addr++, b_eeprom++)
4180                 *b_eeprom = trms1040_get_data(io_port, addr);
4181
4182         /* Disable SEEPROM */
4183         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4184              io_port + TRM_S1040_GEN_CONTROL);
4185 }
4186
4187
4188
4189 /**
4190  * check_eeprom - get and check contents of the eeprom
4191  *
4192  * Read seeprom 128 bytes into the memory provider in eeprom.
4193  * Checks the checksum and if it's not correct it uses a set of default
4194  * values.
4195  *
4196  * @eeprom:     caller allocated strcuture to read the eeprom data into
4197  * @io_port:    io port to read from
4198  **/
4199 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4200 {
4201         u16 *w_eeprom = (u16 *)eeprom;
4202         u16 w_addr;
4203         u16 cksum;
4204         u32 d_addr;
4205         u32 *d_eeprom;
4206
4207         trms1040_read_all(eeprom, io_port);     /* read eeprom */
4208
4209         cksum = 0;
4210         for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4211              w_addr++, w_eeprom++)
4212                 cksum += *w_eeprom;
4213         if (cksum != 0x1234) {
4214                 /*
4215                  * Checksum is wrong.
4216                  * Load a set of defaults into the eeprom buffer
4217                  */
4218                 dprintkl(KERN_WARNING,
4219                         "EEProm checksum error: using default values and options.\n");
4220                 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4221                 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4222                 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4223                 eeprom->sub_sys_id[1] =
4224                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4225                 eeprom->sub_class = 0x00;
4226                 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4227                 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4228                 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4229                 eeprom->device_id[1] =
4230                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4231                 eeprom->reserved = 0x00;
4232
4233                 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4234                      d_addr < 16; d_addr++, d_eeprom++)
4235                         *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4236
4237                 *d_eeprom++ = 0x04000F07;       /* max_tag,delay_time,channel_cfg,scsi_id */
4238                 *d_eeprom++ = 0x00000015;       /* reserved1,boot_lun,boot_target,reserved0 */
4239                 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4240                         *d_eeprom = 0x00;
4241
4242                 /* Now load defaults (maybe set by boot/module params) */
4243                 set_safe_settings();
4244                 fix_settings();
4245                 eeprom_override(eeprom);
4246
4247                 eeprom->cksum = 0x00;
4248                 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4249                      w_addr < 63; w_addr++, w_eeprom++)
4250                         cksum += *w_eeprom;
4251
4252                 *w_eeprom = 0x1234 - cksum;
4253                 trms1040_write_all(eeprom, io_port);
4254                 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4255         } else {
4256                 set_safe_settings();
4257                 eeprom_index_to_delay(eeprom);
4258                 eeprom_override(eeprom);
4259         }
4260 }
4261
4262
4263 /**
4264  * print_eeprom_settings - output the eeprom settings
4265  * to the kernel log so people can see what they were.
4266  *
4267  * @eeprom: The eeprom data strucutre to show details for.
4268  **/
4269 static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4270 {
4271         dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4272                 eeprom->scsi_id,
4273                 eeprom->target[0].period,
4274                 clock_speed[eeprom->target[0].period] / 10,
4275                 clock_speed[eeprom->target[0].period] % 10,
4276                 eeprom->target[0].cfg0);
4277         dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4278                 eeprom->channel_cfg, eeprom->max_tag,
4279                 1 << eeprom->max_tag, eeprom->delay_time);
4280 }
4281
4282
4283 /* Free SG tables */
4284 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4285 {
4286         int i;
4287         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4288
4289         for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4290                 kfree(acb->srb_array[i].segment_x);
4291 }
4292
4293
4294 /*
4295  * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4296  * should never cross a page boundary */
4297 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4298 {
4299         const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4300                                     *SEGMENTX_LEN;
4301         int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4302         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4303         int srb_idx = 0;
4304         unsigned i = 0;
4305         struct SGentry *ptr;
4306
4307         for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4308                 acb->srb_array[i].segment_x = NULL;
4309
4310         dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4311         while (pages--) {
4312                 ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL);
4313                 if (!ptr) {
4314                         adapter_sg_tables_free(acb);
4315                         return 1;
4316                 }
4317                 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4318                         PAGE_SIZE, ptr, srb_idx);
4319                 i = 0;
4320                 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4321                         acb->srb_array[srb_idx++].segment_x =
4322                             ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4323         }
4324         if (i < srbs_per_page)
4325                 acb->srb.segment_x =
4326                     ptr + (i * DC395x_MAX_SG_LISTENTRY);
4327         else
4328                 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4329         return 0;
4330 }
4331
4332
4333
4334 /**
4335  * adapter_print_config - print adapter connection and termination
4336  * config
4337  *
4338  * The io port in the adapter needs to have been set before calling
4339  * this function.
4340  *
4341  * @acb: The adapter to print the information for.
4342  **/
4343 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4344 {
4345         u8 bval;
4346
4347         bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4348         dprintkl(KERN_INFO, "%sConnectors: ",
4349                 ((bval & WIDESCSI) ? "(Wide) " : ""));
4350         if (!(bval & CON5068))
4351                 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4352         if (!(bval & CON68))
4353                 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4354         if (!(bval & CON50))
4355                 printk("int50 ");
4356         if ((bval & (CON5068 | CON50 | CON68)) ==
4357             0 /*(CON5068 | CON50 | CON68) */ )
4358                 printk(" Oops! (All 3?) ");
4359         bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4360         printk(" Termination: ");
4361         if (bval & DIS_TERM)
4362                 printk("Disabled\n");
4363         else {
4364                 if (bval & AUTOTERM)
4365                         printk("Auto ");
4366                 if (bval & LOW8TERM)
4367                         printk("Low ");
4368                 if (bval & UP8TERM)
4369                         printk("High ");
4370                 printk("\n");
4371         }
4372 }
4373
4374
4375 /**
4376  * adapter_init_params - Initialize the various parameters in the
4377  * adapter structure. Note that the pointer to the scsi_host is set
4378  * early (when this instance is created) and the io_port and irq
4379  * values are set later after they have been reserved. This just gets
4380  * everything set to a good starting position.
4381  *
4382  * The eeprom structure in the adapter needs to have been set before
4383  * calling this function.
4384  *
4385  * @acb: The adapter to initialize.
4386  **/
4387 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4388 {
4389         struct NvRamType *eeprom = &acb->eeprom;
4390         int i;
4391
4392         /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4393         /* NOTE: acb->io_port_base is set at port registration time */
4394         /* NOTE: acb->io_port_len is set at port registration time */
4395
4396         INIT_LIST_HEAD(&acb->dcb_list);
4397         acb->dcb_run_robin = NULL;
4398         acb->active_dcb = NULL;
4399
4400         INIT_LIST_HEAD(&acb->srb_free_list);
4401         /*  temp SRB for Q tag used or abort command used  */
4402         acb->tmp_srb = &acb->srb;
4403         init_timer(&acb->waiting_timer);
4404         init_timer(&acb->selto_timer);
4405
4406         acb->srb_count = DC395x_MAX_SRB_CNT;
4407
4408         acb->sel_timeout = DC395x_SEL_TIMEOUT;  /* timeout=250ms */
4409         /* NOTE: acb->irq_level is set at IRQ registration time */
4410
4411         acb->tag_max_num = 1 << eeprom->max_tag;
4412         if (acb->tag_max_num > 30)
4413                 acb->tag_max_num = 30;
4414
4415         acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE, RESET_DEV */
4416         acb->gmode2 = eeprom->channel_cfg;
4417         acb->config = 0;        /* NOTE: actually set in adapter_init_chip */
4418
4419         if (eeprom->channel_cfg & NAC_SCANLUN)
4420                 acb->lun_chk = 1;
4421         acb->scan_devices = 1;
4422
4423         acb->scsi_host->this_id = eeprom->scsi_id;
4424         acb->hostid_bit = (1 << acb->scsi_host->this_id);
4425
4426         for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4427                 acb->dcb_map[i] = 0;
4428
4429         acb->msg_len = 0;
4430
4431         /* link static array of srbs into the srb free list */
4432         for (i = 0; i < acb->srb_count - 1; i++)
4433                 srb_free_insert(acb, &acb->srb_array[i]);
4434 }
4435
4436
4437 /**
4438  * adapter_init_host - Initialize the scsi host instance based on
4439  * values that we have already stored in the adapter instance. There's
4440  * some mention that a lot of these are deprecated, so we won't use
4441  * them (we'll use the ones in the adapter instance) but we'll fill
4442  * them in in case something else needs them.
4443  *
4444  * The eeprom structure, irq and io ports in the adapter need to have
4445  * been set before calling this function.
4446  *
4447  * @host: The scsi host instance to fill in the values for.
4448  **/
4449 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4450 {
4451         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4452         struct NvRamType *eeprom = &acb->eeprom;
4453
4454         host->max_cmd_len = 24;
4455         host->can_queue = DC395x_MAX_CMD_QUEUE;
4456         host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4457         host->this_id = (int)eeprom->scsi_id;
4458         host->io_port = acb->io_port_base;
4459         host->n_io_port = acb->io_port_len;
4460         host->dma_channel = -1;
4461         host->unique_id = acb->io_port_base;
4462         host->irq = acb->irq_level;
4463         host->last_reset = jiffies;
4464
4465         host->max_id = 16;
4466         if (host->max_id - 1 == eeprom->scsi_id)
4467                 host->max_id--;
4468
4469 #ifdef CONFIG_SCSI_MULTI_LUN
4470         if (eeprom->channel_cfg & NAC_SCANLUN)
4471                 host->max_lun = 8;
4472         else
4473                 host->max_lun = 1;
4474 #else
4475         host->max_lun = 1;
4476 #endif
4477
4478 }
4479
4480
4481 /**
4482  * adapter_init_chip - Get the chip into a know state and figure out
4483  * some of the settings that apply to this adapter.
4484  *
4485  * The io port in the adapter needs to have been set before calling
4486  * this function. The config will be configured correctly on return.
4487  *
4488  * @acb: The adapter which we are to init.
4489  **/
4490 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4491 {
4492         struct NvRamType *eeprom = &acb->eeprom;
4493
4494         /* Mask all the interrupt */
4495         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4496         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4497
4498         /* Reset SCSI module */
4499         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4500
4501         /* Reset PCI/DMA module */
4502         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4503         udelay(20);
4504
4505         /* program configuration 0 */
4506         acb->config = HCC_AUTOTERM | HCC_PARITY;
4507         if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4508                 acb->config |= HCC_WIDE_CARD;
4509
4510         if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4511                 acb->config |= HCC_SCSI_RESET;
4512
4513         if (acb->config & HCC_SCSI_RESET) {
4514                 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4515                 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4516
4517                 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4518                 /*spin_unlock_irq (&io_request_lock); */
4519                 udelay(500);
4520
4521                 acb->scsi_host->last_reset =
4522                     jiffies + HZ / 2 +
4523                     HZ * acb->eeprom.delay_time;
4524
4525                 /*spin_lock_irq (&io_request_lock); */
4526         }
4527 }
4528
4529
4530 /**
4531  * init_adapter - Grab the resource for the card, setup the adapter
4532  * information, set the card into a known state, create the various
4533  * tables etc etc. This basically gets all adapter information all up
4534  * to date, intialised and gets the chip in sync with it.
4535  *
4536  * @host:       This hosts adapter structure
4537  * @io_port:    The base I/O port
4538  * @irq:        IRQ
4539  *
4540  * Returns 0 if the initialization succeeds, any other value on
4541  * failure.
4542  **/
4543 static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4544         unsigned long io_port, u32 io_port_len, unsigned int irq)
4545 {
4546         if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4547                 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4548                 goto failed;
4549         }
4550         /* store port base to indicate we have registered it */
4551         acb->io_port_base = io_port;
4552         acb->io_port_len = io_port_len;
4553
4554         if (request_irq(irq, dc395x_interrupt, SA_SHIRQ, DC395X_NAME, acb)) {
4555                 /* release the region we just claimed */
4556                 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4557                 goto failed;
4558         }
4559         /* store irq to indicate we have registered it */
4560         acb->irq_level = irq;
4561
4562         /* get eeprom configuration information and command line settings etc */
4563         check_eeprom(&acb->eeprom, io_port);
4564         print_eeprom_settings(&acb->eeprom);
4565
4566         /* setup adapter control block */
4567         adapter_init_params(acb);
4568
4569         /* display card connectors/termination settings */
4570         adapter_print_config(acb);
4571
4572         if (adapter_sg_tables_alloc(acb)) {
4573                 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4574                 goto failed;
4575         }
4576         adapter_init_scsi_host(acb->scsi_host);
4577         adapter_init_chip(acb);
4578         set_basic_config(acb);
4579
4580         dprintkdbg(DBG_0,
4581                 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4582                 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4583                 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4584                 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4585         return 0;
4586
4587 failed:
4588         if (acb->irq_level)
4589                 free_irq(acb->irq_level, acb);
4590         if (acb->io_port_base)
4591                 release_region(acb->io_port_base, acb->io_port_len);
4592         adapter_sg_tables_free(acb);
4593
4594         return 1;
4595 }
4596
4597
4598 /**
4599  * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4600  * stopping all operations and disabling interrupt generation on the
4601  * card.
4602  *
4603  * @acb: The adapter which we are to shutdown.
4604  **/
4605 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4606 {
4607         /* disable interrupts */
4608         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4609         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4610
4611         /* reset the scsi bus */
4612         if (acb->config & HCC_SCSI_RESET)
4613                 reset_scsi_bus(acb);
4614
4615         /* clear any pending interupt state */
4616         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4617 }
4618
4619
4620
4621 /**
4622  * adapter_uninit - Shut down the chip and release any resources that
4623  * we had allocated. Once this returns the adapter should not be used
4624  * anymore.
4625  *
4626  * @acb: The adapter which we are to un-initialize.
4627  **/
4628 static void adapter_uninit(struct AdapterCtlBlk *acb)
4629 {
4630         unsigned long flags;
4631         DC395x_LOCK_IO(acb->scsi_host, flags);
4632
4633         /* remove timers */
4634         if (timer_pending(&acb->waiting_timer))
4635                 del_timer(&acb->waiting_timer);
4636         if (timer_pending(&acb->selto_timer))
4637                 del_timer(&acb->selto_timer);
4638
4639         adapter_uninit_chip(acb);
4640         adapter_remove_and_free_all_devices(acb);
4641         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4642
4643         if (acb->irq_level)
4644                 free_irq(acb->irq_level, acb);
4645         if (acb->io_port_base)
4646                 release_region(acb->io_port_base, acb->io_port_len);
4647
4648         adapter_sg_tables_free(acb);
4649 }
4650
4651
4652 #undef SPRINTF
4653 #define SPRINTF(args...) pos += sprintf(pos, args)
4654
4655 #undef YESNO
4656 #define YESNO(YN) \
4657  if (YN) SPRINTF(" Yes ");\
4658  else SPRINTF(" No  ")
4659
4660 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4661                 char **start, off_t offset, int length, int inout)
4662 {
4663         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4664         int spd, spd1;
4665         char *pos = buffer;
4666         struct DeviceCtlBlk *dcb;
4667         unsigned long flags;
4668         int dev;
4669
4670         if (inout)              /* Has data been written to the file ? */
4671                 return -EPERM;
4672
4673         SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4674         SPRINTF(" Driver Version " DC395X_VERSION "\n");
4675
4676         DC395x_LOCK_IO(acb->scsi_host, flags);
4677
4678         SPRINTF("SCSI Host Nr %i, ", host->host_no);
4679         SPRINTF("DC395U/UW/F DC315/U %s\n",
4680                 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4681         SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4682         SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4683         SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4684
4685         SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4686         SPRINTF("AdapterID %i\n", host->this_id);
4687
4688         SPRINTF("tag_max_num %i", acb->tag_max_num);
4689         /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4690         SPRINTF(", FilterCfg 0x%02x",
4691                 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4692         SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4693         /*SPRINTF("\n"); */
4694
4695         SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4696         SPRINTF
4697             ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4698              acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4699              acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4700              acb->dcb_map[6], acb->dcb_map[7]);
4701         SPRINTF
4702             ("                      %02x %02x %02x %02x %02x %02x %02x %02x\n",
4703              acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4704              acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4705              acb->dcb_map[14], acb->dcb_map[15]);
4706
4707         SPRINTF
4708             ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4709
4710         dev = 0;
4711         list_for_each_entry(dcb, &acb->dcb_list, list) {
4712                 int nego_period;
4713                 SPRINTF("%02i %02i  %02i ", dev, dcb->target_id,
4714                         dcb->target_lun);
4715                 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4716                 YESNO(dcb->sync_offset);
4717                 YESNO(dcb->sync_period & WIDE_SYNC);
4718                 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4719                 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4720                 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4721                 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4722                 if (dcb->sync_offset)
4723                         SPRINTF("  %03i ns ", nego_period);
4724                 else
4725                         SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4726
4727                 if (dcb->sync_offset & 0x0f) {
4728                         spd = 1000 / (nego_period);
4729                         spd1 = 1000 % (nego_period);
4730                         spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4731                         SPRINTF("   %2i.%1i M     %02i ", spd, spd1,
4732                                 (dcb->sync_offset & 0x0f));
4733                 } else
4734                         SPRINTF("                 ");
4735
4736                 /* Add more info ... */
4737                 SPRINTF("     %02i\n", dcb->max_command);
4738                 dev++;
4739         }
4740
4741         if (timer_pending(&acb->waiting_timer))
4742                 SPRINTF("Waiting queue timer running\n");
4743         else
4744                 SPRINTF("\n");
4745
4746         list_for_each_entry(dcb, &acb->dcb_list, list) {
4747                 struct ScsiReqBlk *srb;
4748                 if (!list_empty(&dcb->srb_waiting_list))
4749                         SPRINTF("DCB (%02i-%i): Waiting: %i:",
4750                                 dcb->target_id, dcb->target_lun,
4751                                 list_size(&dcb->srb_waiting_list));
4752                 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4753                         SPRINTF(" %li", srb->cmd->pid);
4754                 if (!list_empty(&dcb->srb_going_list))
4755                         SPRINTF("\nDCB (%02i-%i): Going  : %i:",
4756                                 dcb->target_id, dcb->target_lun,
4757                                 list_size(&dcb->srb_going_list));
4758                 list_for_each_entry(srb, &dcb->srb_going_list, list)
4759                         SPRINTF(" %li", srb->cmd->pid);
4760                 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4761                         SPRINTF("\n");
4762         }
4763
4764         if (debug_enabled(DBG_1)) {
4765                 SPRINTF("DCB list for ACB %p:\n", acb);
4766                 list_for_each_entry(dcb, &acb->dcb_list, list) {
4767                         SPRINTF("%p -> ", dcb);
4768                 }
4769                 SPRINTF("END\n");
4770         }
4771
4772         *start = buffer + offset;
4773         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4774
4775         if (pos - buffer < offset)
4776                 return 0;
4777         else if (pos - buffer - offset < length)
4778                 return pos - buffer - offset;
4779         else
4780                 return length;
4781 }
4782
4783
4784 static struct scsi_host_template dc395x_driver_template = {
4785         .module                 = THIS_MODULE,
4786         .proc_name              = DC395X_NAME,
4787         .proc_info              = dc395x_proc_info,
4788         .name                   = DC395X_BANNER " " DC395X_VERSION,
4789         .queuecommand           = dc395x_queue_command,
4790         .bios_param             = dc395x_bios_param,
4791         .slave_alloc            = dc395x_slave_alloc,
4792         .slave_destroy          = dc395x_slave_destroy,
4793         .can_queue              = DC395x_MAX_CAN_QUEUE,
4794         .this_id                = 7,
4795         .sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4796         .cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4797         .eh_abort_handler       = dc395x_eh_abort,
4798         .eh_bus_reset_handler   = dc395x_eh_bus_reset,
4799         .unchecked_isa_dma      = 0,
4800         .use_clustering         = DISABLE_CLUSTERING,
4801 };
4802
4803
4804 /**
4805  * banner_display - Display banner on first instance of driver
4806  * initialized.
4807  **/
4808 static void banner_display(void)
4809 {
4810         static int banner_done = 0;
4811         if (!banner_done)
4812         {
4813                 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4814                 banner_done = 1;
4815         }
4816 }
4817
4818
4819 /**
4820  * dc395x_init_one - Initialise a single instance of the adapter.
4821  *
4822  * The PCI layer will call this once for each instance of the adapter
4823  * that it finds in the system. The pci_dev strcuture indicates which
4824  * instance we are being called from.
4825  *
4826  * @dev: The PCI device to intialize.
4827  * @id: Looks like a pointer to the entry in our pci device table
4828  * that was actually matched by the PCI subsystem.
4829  *
4830  * Returns 0 on success, or an error code (-ve) on failure.
4831  **/
4832 static int __devinit dc395x_init_one(struct pci_dev *dev,
4833                 const struct pci_device_id *id)
4834 {
4835         struct Scsi_Host *scsi_host = NULL;
4836         struct AdapterCtlBlk *acb = NULL;
4837         unsigned long io_port_base;
4838         unsigned int io_port_len;
4839         unsigned int irq;
4840
4841         dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4842         banner_display();
4843
4844         if (pci_enable_device(dev))
4845         {
4846                 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4847                 return -ENODEV;
4848         }
4849         io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4850         io_port_len = pci_resource_len(dev, 0);
4851         irq = dev->irq;
4852         dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4853
4854         /* allocate scsi host information (includes out adapter) */
4855         scsi_host = scsi_host_alloc(&dc395x_driver_template,
4856                                     sizeof(struct AdapterCtlBlk));
4857         if (!scsi_host) {
4858                 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4859                 goto fail;
4860         }
4861         acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4862         acb->scsi_host = scsi_host;
4863         acb->dev = dev;
4864
4865         /* initialise the adapter and everything we need */
4866         if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4867                 dprintkl(KERN_INFO, "adapter init failed\n");
4868                 goto fail;
4869         }
4870
4871         pci_set_master(dev);
4872
4873         /* get the scsi mid level to scan for new devices on the bus */
4874         if (scsi_add_host(scsi_host, &dev->dev)) {
4875                 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4876                 goto fail;
4877         }
4878         pci_set_drvdata(dev, scsi_host);
4879         scsi_scan_host(scsi_host);
4880
4881         return 0;
4882
4883 fail:
4884         if (acb != NULL)
4885                 adapter_uninit(acb);
4886         if (scsi_host != NULL)
4887                 scsi_host_put(scsi_host);
4888         pci_disable_device(dev);
4889         return -ENODEV;
4890 }
4891
4892
4893 /**
4894  * dc395x_remove_one - Called to remove a single instance of the
4895  * adapter.
4896  *
4897  * @dev: The PCI device to intialize.
4898  **/
4899 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4900 {
4901         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4902         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4903
4904         dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4905
4906         scsi_remove_host(scsi_host);
4907         adapter_uninit(acb);
4908         pci_disable_device(dev);
4909         scsi_host_put(scsi_host);
4910         pci_set_drvdata(dev, NULL);
4911 }
4912
4913
4914 static struct pci_device_id dc395x_pci_table[] = {
4915         {
4916                 .vendor         = PCI_VENDOR_ID_TEKRAM,
4917                 .device         = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4918                 .subvendor      = PCI_ANY_ID,
4919                 .subdevice      = PCI_ANY_ID,
4920          },
4921         {}                      /* Terminating entry */
4922 };
4923 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4924
4925
4926 static struct pci_driver dc395x_driver = {
4927         .name           = DC395X_NAME,
4928         .id_table       = dc395x_pci_table,
4929         .probe          = dc395x_init_one,
4930         .remove         = __devexit_p(dc395x_remove_one),
4931 };
4932
4933
4934 /**
4935  * dc395x_module_init - Module initialization function
4936  *
4937  * Used by both module and built-in driver to initialise this driver.
4938  **/
4939 static int __init dc395x_module_init(void)
4940 {
4941         return pci_module_init(&dc395x_driver);
4942 }
4943
4944
4945 /**
4946  * dc395x_module_exit - Module cleanup function.
4947  **/
4948 static void __exit dc395x_module_exit(void)
4949 {
4950         pci_unregister_driver(&dc395x_driver);
4951 }
4952
4953
4954 module_init(dc395x_module_init);
4955 module_exit(dc395x_module_exit);
4956
4957 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4958 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4959 MODULE_LICENSE("GPL");