drivers/scsi/dc395x.c

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