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