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