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