drivers/scsi/dc395x.c

   1 /*
   2  * dc395x.c
   3  *
   4  * Device Driver for Tekram DC395(U/UW/F), DC315(U)
   5  * PCI SCSI Bus Master Host Adapter
   6  * (SCSI chip set used Tekram ASIC TRM-S1040)
   7  *
   8  * Authors:
   9  *  C.L. Huang <ching@tekram.com.tw>
  10  *  Erich Chen <erich@tekram.com.tw>
  11  *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
  12  *
  13  *  Kurt Garloff <garloff@suse.de>
  14  *  (C) 1999-2000 Kurt Garloff
  15  *
  16  *  Oliver Neukum <oliver@neukum.name>
  17  *  Ali Akcaagac <aliakc@web.de>
  18  *  Jamie Lenehan <lenehan@twibble.org>
  19  *  (C) 2003
  20  *
  21  * License: GNU GPL
  22  *
  23  *************************************************************************
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the above copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. The name of the author may not be used to endorse or promote products
  34  *    derived from this software without specific prior written permission.
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  37  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  38  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  39  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  40  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  42  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  43  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  44  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  45  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  46  *
  47  ************************************************************************
  48  */
  49 #include <linux/module.h>
  50 #include <linux/moduleparam.h>
  51 #include <linux/delay.h>
  52 #include <linux/ctype.h>
  53 #include <linux/blkdev.h>
  54 #include <linux/interrupt.h>
  55 #include <linux/init.h>
  56 #include <linux/spinlock.h>
  57 #include <linux/pci.h>
  58 #include <linux/list.h>
  59 #include <linux/vmalloc.h>
  60 #include <linux/slab.h>
  61 #include <asm/io.h>
  62
  63 #include <scsi/scsi.h>
  64 #include <scsi/scsicam.h>       /* needed for scsicam_bios_param */
  65 #include <scsi/scsi_cmnd.h>
  66 #include <scsi/scsi_device.h>
  67 #include <scsi/scsi_host.h>
  68
  69 #include "dc395x.h"
  70
  71 #define DC395X_NAME     "dc395x"
  72 #define DC395X_BANNER   "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
  73 #define DC395X_VERSION  "v2.05, 2004/03/08"
  74
  75 /*---------------------------------------------------------------------------
  76                                   Features
  77  ---------------------------------------------------------------------------*/
  78 /*
  79  * Set to disable parts of the driver
  80  */
  81 /*#define DC395x_NO_DISCONNECT*/
  82 /*#define DC395x_NO_TAGQ*/
  83 /*#define DC395x_NO_SYNC*/
  84 /*#define DC395x_NO_WIDE*/
  85
  86 /*---------------------------------------------------------------------------
  87                                   Debugging
  88  ---------------------------------------------------------------------------*/
  89 /*
  90  * Types of debugging that can be enabled and disabled
  91  */
  92 #define DBG_KG          0x0001
  93 #define DBG_0           0x0002
  94 #define DBG_1           0x0004
  95 #define DBG_SG          0x0020
  96 #define DBG_FIFO        0x0040
  97 #define DBG_PIO         0x0080
  98
  99
 100 /*
 101  * Set set of things to output debugging for.
 102  * Undefine to remove all debugging
 103  */
 104 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
 105 /*#define  DEBUG_MASK   DBG_0*/
 106
 107
 108 /*
 109  * Output a kernel mesage at the specified level and append the
 110  * driver name and a ": " to the start of the message
 111  */
 112 #define dprintkl(level, format, arg...)  \
 113     printk(level DC395X_NAME ": " format , ## arg)
 114
 115
 116 #ifdef DEBUG_MASK
 117 /*
 118  * print a debug message - this is formated with KERN_DEBUG, then the
 119  * driver name followed by a ": " and then the message is output.
 120  * This also checks that the specified debug level is enabled before
 121  * outputing the message
 122  */
 123 #define dprintkdbg(type, format, arg...) \
 124         do { \
 125                 if ((type) & (DEBUG_MASK)) \
 126                         dprintkl(KERN_DEBUG , format , ## arg); \
 127         } while (0)
 128
 129 /*
 130  * Check if the specified type of debugging is enabled
 131  */
 132 #define debug_enabled(type)     ((DEBUG_MASK) & (type))
 133
 134 #else
 135 /*
 136  * No debugging. Do nothing
 137  */
 138 #define dprintkdbg(type, format, arg...) \
 139         do {} while (0)
 140 #define debug_enabled(type)     (0)
 141
 142 #endif
 143
 144
 145 #ifndef PCI_VENDOR_ID_TEKRAM
 146 #define PCI_VENDOR_ID_TEKRAM                    0x1DE1  /* Vendor ID    */
 147 #endif
 148 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
 149 #define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391  /* Device ID    */
 150 #endif
 151
 152
 153 #define DC395x_LOCK_IO(dev,flags)               spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
 154 #define DC395x_UNLOCK_IO(dev,flags)             spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
 155
 156 #define DC395x_read8(acb,address)               (u8)(inb(acb->io_port_base + (address)))
 157 #define DC395x_read16(acb,address)              (u16)(inw(acb->io_port_base + (address)))
 158 #define DC395x_read32(acb,address)              (u32)(inl(acb->io_port_base + (address)))
 159 #define DC395x_write8(acb,address,value)        outb((value), acb->io_port_base + (address))
 160 #define DC395x_write16(acb,address,value)       outw((value), acb->io_port_base + (address))
 161 #define DC395x_write32(acb,address,value)       outl((value), acb->io_port_base + (address))
 162
 163 /* cmd->result */
 164 #define RES_TARGET              0x000000FF      /* Target State */
 165 #define RES_TARGET_LNX  STATUS_MASK     /* Only official ... */
 166 #define RES_ENDMSG              0x0000FF00      /* End Message */
 167 #define RES_DID                 0x00FF0000      /* DID_ codes */
 168 #define RES_DRV                 0xFF000000      /* DRIVER_ codes */
 169
 170 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
 171 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
 172
 173 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
 174 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
 175 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
 176 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
 177 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
 178
 179 #define TAG_NONE 255
 180
 181 /*
 182  * srb->segement_x is the hw sg list. It is always allocated as a
 183  * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
 184  * cross a page boundy.
 185  */
 186 #define SEGMENTX_LEN    (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
 187
 188
 189 struct SGentry {
 190         u32 address;            /* bus! address */
 191         u32 length;
 192 };
 193
 194 /* The SEEPROM structure for TRM_S1040 */
 195 struct NVRamTarget {
 196         u8 cfg0;                /* Target configuration byte 0  */
 197         u8 period;              /* Target period                */
 198         u8 cfg2;                /* Target configuration byte 2  */
 199         u8 cfg3;                /* Target configuration byte 3  */
 200 };
 201
 202 struct NvRamType {
 203         u8 sub_vendor_id[2];    /* 0,1  Sub Vendor ID   */
 204         u8 sub_sys_id[2];       /* 2,3  Sub System ID   */
 205         u8 sub_class;           /* 4    Sub Class       */
 206         u8 vendor_id[2];        /* 5,6  Vendor ID       */
 207         u8 device_id[2];        /* 7,8  Device ID       */
 208         u8 reserved;            /* 9    Reserved        */
 209         struct NVRamTarget target[DC395x_MAX_SCSI_ID];
 210                                                 /** 10,11,12,13
 211                                                  ** 14,15,16,17
 212                                                  ** ....
 213                                                  ** ....
 214                                                  ** 70,71,72,73
 215                                                  */
 216         u8 scsi_id;             /* 74 Host Adapter SCSI ID      */
 217         u8 channel_cfg;         /* 75 Channel configuration     */
 218         u8 delay_time;          /* 76 Power on delay time       */
 219         u8 max_tag;             /* 77 Maximum tags              */
 220         u8 reserved0;           /* 78  */
 221         u8 boot_target;         /* 79  */
 222         u8 boot_lun;            /* 80  */
 223         u8 reserved1;           /* 81  */
 224         u16 reserved2[22];      /* 82,..125 */
 225         u16 cksum;              /* 126,127 */
 226 };
 227
 228 struct ScsiReqBlk {
 229         struct list_head list;          /* next/prev ptrs for srb lists */
 230         struct DeviceCtlBlk *dcb;
 231         struct scsi_cmnd *cmd;
 232
 233         struct SGentry *segment_x;      /* Linear array of hw sg entries (up to 64 entries) */
 234         dma_addr_t sg_bus_addr;         /* Bus address of sg list (ie, of segment_x) */
 235
 236         u8 sg_count;                    /* No of HW sg entries for this request */
 237         u8 sg_index;                    /* Index of HW sg entry for this request */
 238         size_t total_xfer_length;       /* Total number of bytes remaining to be transferred */
 239         size_t request_length;          /* Total number of bytes in this request */
 240         /*
 241          * The sense buffer handling function, request_sense, uses
 242          * the first hw sg entry (segment_x[0]) and the transfer
 243          * length (total_xfer_length). While doing this it stores the
 244          * original values into the last sg hw list
 245          * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
 246          * total_xfer_length in xferred. These values are restored in
 247          * pci_unmap_srb_sense. This is the only place xferred is used.
 248          */
 249         size_t xferred;                 /* Saved copy of total_xfer_length */
 250
 251         u16 state;
 252
 253         u8 msgin_buf[6];
 254         u8 msgout_buf[6];
 255
 256         u8 adapter_status;
 257         u8 target_status;
 258         u8 msg_count;
 259         u8 end_message;
 260
 261         u8 tag_number;
 262         u8 status;
 263         u8 retry_count;
 264         u8 flag;
 265
 266         u8 scsi_phase;
 267 };
 268
 269 struct DeviceCtlBlk {
 270         struct list_head list;          /* next/prev ptrs for the dcb list */
 271         struct AdapterCtlBlk *acb;
 272         struct list_head srb_going_list;        /* head of going srb list */
 273         struct list_head srb_waiting_list;      /* head of waiting srb list */
 274
 275         struct ScsiReqBlk *active_srb;
 276         u32 tag_mask;
 277
 278         u16 max_command;
 279
 280         u8 target_id;           /* SCSI Target ID  (SCSI Only) */
 281         u8 target_lun;          /* SCSI Log.  Unit (SCSI Only) */
 282         u8 identify_msg;
 283         u8 dev_mode;
 284
 285         u8 inquiry7;            /* To store Inquiry flags */
 286         u8 sync_mode;           /* 0:async mode */
 287         u8 min_nego_period;     /* for nego. */
 288         u8 sync_period;         /* for reg.  */
 289
 290         u8 sync_offset;         /* for reg. and nego.(low nibble) */
 291         u8 flag;
 292         u8 dev_type;
 293         u8 init_tcq_flag;
 294 };
 295
 296 struct AdapterCtlBlk {
 297         struct Scsi_Host *scsi_host;
 298
 299         unsigned long io_port_base;
 300         unsigned long io_port_len;
 301
 302         struct list_head dcb_list;              /* head of going dcb list */
 303         struct DeviceCtlBlk *dcb_run_robin;
 304         struct DeviceCtlBlk *active_dcb;
 305
 306         struct list_head srb_free_list;         /* head of free srb list */
 307         struct ScsiReqBlk *tmp_srb;
 308         struct timer_list waiting_timer;
 309         struct timer_list selto_timer;
 310
 311         unsigned long last_reset;
 312
 313         u16 srb_count;
 314
 315         u8 sel_timeout;
 316
 317         unsigned int irq_level;
 318         u8 tag_max_num;
 319         u8 acb_flag;
 320         u8 gmode2;
 321
 322         u8 config;
 323         u8 lun_chk;
 324         u8 scan_devices;
 325         u8 hostid_bit;
 326
 327         u8 dcb_map[DC395x_MAX_SCSI_ID];
 328         struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
 329
 330         struct pci_dev *dev;
 331
 332         u8 msg_len;
 333
 334         struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
 335         struct ScsiReqBlk srb;
 336
 337         struct NvRamType eeprom;        /* eeprom settings for this adapter */
 338 };
 339
 340
 341 /*---------------------------------------------------------------------------
 342                             Forward declarations
 343  ---------------------------------------------------------------------------*/
 344 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 345                 u16 *pscsi_status);
 346 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 347                 u16 *pscsi_status);
 348 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 349                 u16 *pscsi_status);
 350 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 351                 u16 *pscsi_status);
 352 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 353                 u16 *pscsi_status);
 354 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 355                 u16 *pscsi_status);
 356 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 357                 u16 *pscsi_status);
 358 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 359                 u16 *pscsi_status);
 360 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 361                 u16 *pscsi_status);
 362 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 363                 u16 *pscsi_status);
 364 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 365                 u16 *pscsi_status);
 366 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 367                 u16 *pscsi_status);
 368 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 369                 u16 *pscsi_status);
 370 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 371                 u16 *pscsi_status);
 372 static void set_basic_config(struct AdapterCtlBlk *acb);
 373 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
 374                 struct ScsiReqBlk *srb);
 375 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
 376 static void data_io_transfer(struct AdapterCtlBlk *acb,
 377                 struct ScsiReqBlk *srb, u16 io_dir);
 378 static void disconnect(struct AdapterCtlBlk *acb);
 379 static void reselect(struct AdapterCtlBlk *acb);
 380 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 381                 struct ScsiReqBlk *srb);
 382 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
 383                 struct ScsiReqBlk *srb);
 384 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
 385                 struct ScsiReqBlk *srb);
 386 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
 387                 struct scsi_cmnd *cmd, u8 force);
 388 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
 389 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
 390 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
 391                 struct ScsiReqBlk *srb);
 392 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 393                 struct ScsiReqBlk *srb);
 394 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 395                 struct ScsiReqBlk *srb);
 396 static void set_xfer_rate(struct AdapterCtlBlk *acb,
 397                 struct DeviceCtlBlk *dcb);
 398 static void waiting_timeout(struct timer_list *t);
 399
 400
 401 /*---------------------------------------------------------------------------
 402                                  Static Data
 403  ---------------------------------------------------------------------------*/
 404 static u16 current_sync_offset = 0;
 405
 406 static void *dc395x_scsi_phase0[] = {
 407         data_out_phase0,/* phase:0 */
 408         data_in_phase0, /* phase:1 */
 409         command_phase0, /* phase:2 */
 410         status_phase0,  /* phase:3 */
 411         nop0,           /* phase:4 PH_BUS_FREE .. initial phase */
 412         nop0,           /* phase:5 PH_BUS_FREE .. initial phase */
 413         msgout_phase0,  /* phase:6 */
 414         msgin_phase0,   /* phase:7 */
 415 };
 416
 417 static void *dc395x_scsi_phase1[] = {
 418         data_out_phase1,/* phase:0 */
 419         data_in_phase1, /* phase:1 */
 420         command_phase1, /* phase:2 */
 421         status_phase1,  /* phase:3 */
 422         nop1,           /* phase:4 PH_BUS_FREE .. initial phase */
 423         nop1,           /* phase:5 PH_BUS_FREE .. initial phase */
 424         msgout_phase1,  /* phase:6 */
 425         msgin_phase1,   /* phase:7 */
 426 };
 427
 428 /*
 429  *Fast20:       000      50ns, 20.0 MHz
 430  *              001      75ns, 13.3 MHz
 431  *              010     100ns, 10.0 MHz
 432  *              011     125ns,  8.0 MHz
 433  *              100     150ns,  6.6 MHz
 434  *              101     175ns,  5.7 MHz
 435  *              110     200ns,  5.0 MHz
 436  *              111     250ns,  4.0 MHz
 437  *
 438  *Fast40(LVDS): 000      25ns, 40.0 MHz
 439  *              001      50ns, 20.0 MHz
 440  *              010      75ns, 13.3 MHz
 441  *              011     100ns, 10.0 MHz
 442  *              100     125ns,  8.0 MHz
 443  *              101     150ns,  6.6 MHz
 444  *              110     175ns,  5.7 MHz
 445  *              111     200ns,  5.0 MHz
 446  */
 447 /*static u8     clock_period[] = {12,19,25,31,37,44,50,62};*/
 448
 449 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
 450 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
 451 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
 452
 453
 454 /*---------------------------------------------------------------------------
 455                                 Configuration
 456   ---------------------------------------------------------------------------*/
 457 /*
 458  * Module/boot parameters currently effect *all* instances of the
 459  * card in the system.
 460  */
 461
 462 /*
 463  * Command line parameters are stored in a structure below.
 464  * These are the index's into the structure for the various
 465  * command line options.
 466  */
 467 #define CFG_ADAPTER_ID          0
 468 #define CFG_MAX_SPEED           1
 469 #define CFG_DEV_MODE            2
 470 #define CFG_ADAPTER_MODE        3
 471 #define CFG_TAGS                4
 472 #define CFG_RESET_DELAY         5
 473
 474 #define CFG_NUM                 6       /* number of configuration items */
 475
 476
 477 /*
 478  * Value used to indicate that a command line override
 479  * hasn't been used to modify the value.
 480  */
 481 #define CFG_PARAM_UNSET -1
 482
 483
 484 /*
 485  * Hold command line parameters.
 486  */
 487 struct ParameterData {
 488         int value;              /* value of this setting */
 489         int min;                /* minimum value */
 490         int max;                /* maximum value */
 491         int def;                /* default value */
 492         int safe;               /* safe value */
 493 };
 494 static struct ParameterData cfg_data[] = {
 495         { /* adapter id */
 496                 CFG_PARAM_UNSET,
 497                 0,
 498                 15,
 499                 7,
 500                 7
 501         },
 502         { /* max speed */
 503                 CFG_PARAM_UNSET,
 504                   0,
 505                   7,
 506                   1,    /* 13.3Mhz */
 507                   4,    /*  6.7Hmz */
 508         },
 509         { /* dev mode */
 510                 CFG_PARAM_UNSET,
 511                 0,
 512                 0x3f,
 513                 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
 514                         NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
 515                         NTC_DO_SEND_START,
 516                 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
 517         },
 518         { /* adapter mode */
 519                 CFG_PARAM_UNSET,
 520                 0,
 521                 0x2f,
 522                 NAC_SCANLUN |
 523                 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
 524                         /*| NAC_ACTIVE_NEG*/,
 525                 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
 526         },
 527         { /* tags */
 528                 CFG_PARAM_UNSET,
 529                 0,
 530                 5,
 531                 3,      /* 16 tags (??) */
 532                 2,
 533         },
 534         { /* reset delay */
 535                 CFG_PARAM_UNSET,
 536                 0,
 537                 180,
 538                 1,      /* 1 second */
 539                 10,     /* 10 seconds */
 540         }
 541 };
 542
 543
 544 /*
 545  * Safe settings. If set to zero the BIOS/default values with
 546  * command line overrides will be used. If set to 1 then safe and
 547  * slow settings will be used.
 548  */
 549 static bool use_safe_settings = 0;
 550 module_param_named(safe, use_safe_settings, bool, 0);
 551 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
 552
 553
 554 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
 555 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
 556
 557 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
 558 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
 559
 560 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
 561 MODULE_PARM_DESC(dev_mode, "Device mode.");
 562
 563 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
 564 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
 565
 566 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
 567 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
 568
 569 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
 570 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
 571
 572
 573 /**
 574  * set_safe_settings - if the use_safe_settings option is set then
 575  * set all values to the safe and slow values.
 576  **/
 577 static void set_safe_settings(void)
 578 {
 579         if (use_safe_settings)
 580         {
 581                 int i;
 582
 583                 dprintkl(KERN_INFO, "Using safe settings.\n");
 584                 for (i = 0; i < CFG_NUM; i++)
 585                 {
 586                         cfg_data[i].value = cfg_data[i].safe;
 587                 }
 588         }
 589 }
 590
 591
 592 /**
 593  * fix_settings - reset any boot parameters which are out of range
 594  * back to the default values.
 595  **/
 596 static void fix_settings(void)
 597 {
 598         int i;
 599
 600         dprintkdbg(DBG_1,
 601                 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
 602                 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
 603                 cfg_data[CFG_ADAPTER_ID].value,
 604                 cfg_data[CFG_MAX_SPEED].value,
 605                 cfg_data[CFG_DEV_MODE].value,
 606                 cfg_data[CFG_ADAPTER_MODE].value,
 607                 cfg_data[CFG_TAGS].value,
 608                 cfg_data[CFG_RESET_DELAY].value);
 609         for (i = 0; i < CFG_NUM; i++)
 610         {
 611                 if (cfg_data[i].value < cfg_data[i].min
 612                     || cfg_data[i].value > cfg_data[i].max)
 613                         cfg_data[i].value = cfg_data[i].def;
 614         }
 615 }
 616
 617
 618
 619 /*
 620  * Mapping from the eeprom delay index value (index into this array)
 621  * to the number of actual seconds that the delay should be for.
 622  */
 623 static char eeprom_index_to_delay_map[] =
 624         { 1, 3, 5, 10, 16, 30, 60, 120 };
 625
 626
 627 /**
 628  * eeprom_index_to_delay - Take the eeprom delay setting and convert it
 629  * into a number of seconds.
 630  *
 631  * @eeprom: The eeprom structure in which we find the delay index to map.
 632  **/
 633 static void eeprom_index_to_delay(struct NvRamType *eeprom)
 634 {
 635         eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
 636 }
 637
 638
 639 /**
 640  * delay_to_eeprom_index - Take a delay in seconds and return the
 641  * closest eeprom index which will delay for at least that amount of
 642  * seconds.
 643  *
 644  * @delay: The delay, in seconds, to find the eeprom index for.
 645  **/
 646 static int delay_to_eeprom_index(int delay)
 647 {
 648         u8 idx = 0;
 649         while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
 650                 idx++;
 651         return idx;
 652 }
 653
 654
 655 /**
 656  * eeprom_override - Override the eeprom settings, in the provided
 657  * eeprom structure, with values that have been set on the command
 658  * line.
 659  *
 660  * @eeprom: The eeprom data to override with command line options.
 661  **/
 662 static void eeprom_override(struct NvRamType *eeprom)
 663 {
 664         u8 id;
 665
 666         /* Adapter Settings */
 667         if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
 668                 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
 669
 670         if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
 671                 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
 672
 673         if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
 674                 eeprom->delay_time = delay_to_eeprom_index(
 675                                         cfg_data[CFG_RESET_DELAY].value);
 676
 677         if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
 678                 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
 679
 680         /* Device Settings */
 681         for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
 682                 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
 683                         eeprom->target[id].cfg0 =
 684                                 (u8)cfg_data[CFG_DEV_MODE].value;
 685
 686                 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
 687                         eeprom->target[id].period =
 688                                 (u8)cfg_data[CFG_MAX_SPEED].value;
 689
 690         }
 691 }
 692
 693
 694 /*---------------------------------------------------------------------------
 695  ---------------------------------------------------------------------------*/
 696
 697 static unsigned int list_size(struct list_head *head)
 698 {
 699         unsigned int count = 0;
 700         struct list_head *pos;
 701         list_for_each(pos, head)
 702                 count++;
 703         return count;
 704 }
 705
 706
 707 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
 708                 struct DeviceCtlBlk *pos)
 709 {
 710         int use_next = 0;
 711         struct DeviceCtlBlk* next = NULL;
 712         struct DeviceCtlBlk* i;
 713
 714         if (list_empty(head))
 715                 return NULL;
 716
 717         /* find supplied dcb and then select the next one */
 718         list_for_each_entry(i, head, list)
 719                 if (use_next) {
 720                         next = i;
 721                         break;
 722                 } else if (i == pos) {
 723                         use_next = 1;
 724                 }
 725         /* if no next one take the head one (ie, wraparound) */
 726         if (!next)
 727                 list_for_each_entry(i, head, list) {
 728                         next = i;
 729                         break;
 730                 }
 731
 732         return next;
 733 }
 734
 735
 736 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
 737 {
 738         if (srb->tag_number < 255) {
 739                 dcb->tag_mask &= ~(1 << srb->tag_number);       /* free tag mask */
 740                 srb->tag_number = 255;
 741         }
 742 }
 743
 744
 745 /* Find cmd in SRB list */
 746 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
 747                 struct list_head *head)
 748 {
 749         struct ScsiReqBlk *i;
 750         list_for_each_entry(i, head, list)
 751                 if (i->cmd == cmd)
 752                         return i;
 753         return NULL;
 754 }
 755
 756 /* Sets the timer to wake us up */
 757 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
 758 {
 759         if (timer_pending(&acb->waiting_timer))
 760                 return;
 761         if (time_before(jiffies + to, acb->last_reset - HZ / 2))
 762                 acb->waiting_timer.expires =
 763                     acb->last_reset - HZ / 2 + 1;
 764         else
 765                 acb->waiting_timer.expires = jiffies + to + 1;
 766         add_timer(&acb->waiting_timer);
 767 }
 768
 769
 770 /* Send the next command from the waiting list to the bus */
 771 static void waiting_process_next(struct AdapterCtlBlk *acb)
 772 {
 773         struct DeviceCtlBlk *start = NULL;
 774         struct DeviceCtlBlk *pos;
 775         struct DeviceCtlBlk *dcb;
 776         struct ScsiReqBlk *srb;
 777         struct list_head *dcb_list_head = &acb->dcb_list;
 778
 779         if (acb->active_dcb
 780             || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
 781                 return;
 782
 783         if (timer_pending(&acb->waiting_timer))
 784                 del_timer(&acb->waiting_timer);
 785
 786         if (list_empty(dcb_list_head))
 787                 return;
 788
 789         /*
 790          * Find the starting dcb. Need to find it again in the list
 791          * since the list may have changed since we set the ptr to it
 792          */
 793         list_for_each_entry(dcb, dcb_list_head, list)
 794                 if (dcb == acb->dcb_run_robin) {
 795                         start = dcb;
 796                         break;
 797                 }
 798         if (!start) {
 799                 /* This can happen! */
 800                 start = list_entry(dcb_list_head->next, typeof(*start), list);
 801                 acb->dcb_run_robin = start;
 802         }
 803
 804
 805         /*
 806          * Loop over the dcb, but we start somewhere (potentially) in
 807          * the middle of the loop so we need to manully do this.
 808          */
 809         pos = start;
 810         do {
 811                 struct list_head *waiting_list_head = &pos->srb_waiting_list;
 812
 813                 /* Make sure, the next another device gets scheduled ... */
 814                 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
 815                                                   acb->dcb_run_robin);
 816
 817                 if (list_empty(waiting_list_head) ||
 818                     pos->max_command <= list_size(&pos->srb_going_list)) {
 819                         /* move to next dcb */
 820                         pos = dcb_get_next(dcb_list_head, pos);
 821                 } else {
 822                         srb = list_entry(waiting_list_head->next,
 823                                          struct ScsiReqBlk, list);
 824
 825                         /* Try to send to the bus */
 826                         if (!start_scsi(acb, pos, srb))
 827                                 list_move(&srb->list, &pos->srb_going_list);
 828                         else
 829                                 waiting_set_timer(acb, HZ/50);
 830                         break;
 831                 }
 832         } while (pos != start);
 833 }
 834
 835
 836 /* Wake up waiting queue */
 837 static void waiting_timeout(struct timer_list *t)
 838 {
 839         unsigned long flags;
 840         struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer);
 841         dprintkdbg(DBG_1,
 842                 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
 843         DC395x_LOCK_IO(acb->scsi_host, flags);
 844         waiting_process_next(acb);
 845         DC395x_UNLOCK_IO(acb->scsi_host, flags);
 846 }
 847
 848
 849 /* Get the DCB for a given ID/LUN combination */
 850 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
 851 {
 852         return acb->children[id][lun];
 853 }
 854
 855
 856 /* Send SCSI Request Block (srb) to adapter (acb) */
 857 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
 858 {
 859         struct DeviceCtlBlk *dcb = srb->dcb;
 860
 861         if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
 862             acb->active_dcb ||
 863             (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
 864                 list_add_tail(&srb->list, &dcb->srb_waiting_list);
 865                 waiting_process_next(acb);
 866                 return;
 867         }
 868
 869         if (!start_scsi(acb, dcb, srb)) {
 870                 list_add_tail(&srb->list, &dcb->srb_going_list);
 871         } else {
 872                 list_add(&srb->list, &dcb->srb_waiting_list);
 873                 waiting_set_timer(acb, HZ / 50);
 874         }
 875 }
 876
 877 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
 878 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
 879                 struct ScsiReqBlk *srb)
 880 {
 881         int nseg;
 882         enum dma_data_direction dir = cmd->sc_data_direction;
 883         dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
 884                 cmd, dcb->target_id, dcb->target_lun);
 885
 886         srb->dcb = dcb;
 887         srb->cmd = cmd;
 888         srb->sg_count = 0;
 889         srb->total_xfer_length = 0;
 890         srb->sg_bus_addr = 0;
 891         srb->sg_index = 0;
 892         srb->adapter_status = 0;
 893         srb->target_status = 0;
 894         srb->msg_count = 0;
 895         srb->status = 0;
 896         srb->flag = 0;
 897         srb->state = 0;
 898         srb->retry_count = 0;
 899         srb->tag_number = TAG_NONE;
 900         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
 901         srb->end_message = 0;
 902
 903         nseg = scsi_dma_map(cmd);
 904         BUG_ON(nseg < 0);
 905
 906         if (dir == PCI_DMA_NONE || !nseg) {
 907                 dprintkdbg(DBG_0,
 908                         "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
 909                            cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
 910                            srb->segment_x[0].address);
 911         } else {
 912                 int i;
 913                 u32 reqlen = scsi_bufflen(cmd);
 914                 struct scatterlist *sg;
 915                 struct SGentry *sgp = srb->segment_x;
 916
 917                 srb->sg_count = nseg;
 918
 919                 dprintkdbg(DBG_0,
 920                            "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
 921                            reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
 922                            srb->sg_count);
 923
 924                 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
 925                         u32 busaddr = (u32)sg_dma_address(sg);
 926                         u32 seglen = (u32)sg->length;
 927                         sgp[i].address = busaddr;
 928                         sgp[i].length = seglen;
 929                         srb->total_xfer_length += seglen;
 930                 }
 931                 sgp += srb->sg_count - 1;
 932
 933                 /*
 934                  * adjust last page if too big as it is allocated
 935                  * on even page boundaries
 936                  */
 937                 if (srb->total_xfer_length > reqlen) {
 938                         sgp->length -= (srb->total_xfer_length - reqlen);
 939                         srb->total_xfer_length = reqlen;
 940                 }
 941
 942                 /* Fixup for WIDE padding - make sure length is even */
 943                 if (dcb->sync_period & WIDE_SYNC &&
 944                     srb->total_xfer_length % 2) {
 945                         srb->total_xfer_length++;
 946                         sgp->length++;
 947                 }
 948
 949                 srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev,
 950                                 srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE);
 951
 952                 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
 953                         srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
 954         }
 955
 956         srb->request_length = srb->total_xfer_length;
 957 }
 958
 959
 960 /**
 961  * dc395x_queue_command - queue scsi command passed from the mid
 962  * layer, invoke 'done' on completion
 963  *
 964  * @cmd: pointer to scsi command object
 965  * @done: function pointer to be invoked on completion
 966  *
 967  * Returns 1 if the adapter (host) is busy, else returns 0. One
 968  * reason for an adapter to be busy is that the number
 969  * of outstanding queued commands is already equal to
 970  * struct Scsi_Host::can_queue .
 971  *
 972  * Required: if struct Scsi_Host::can_queue is ever non-zero
 973  *           then this function is required.
 974  *
 975  * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
 976  *        and is expected to be held on return.
 977  *
 978  **/
 979 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
 980 {
 981         struct DeviceCtlBlk *dcb;
 982         struct ScsiReqBlk *srb;
 983         struct AdapterCtlBlk *acb =
 984             (struct AdapterCtlBlk *)cmd->device->host->hostdata;
 985         dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
 986                 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
 987
 988         /* Assume BAD_TARGET; will be cleared later */
 989         cmd->result = DID_BAD_TARGET << 16;
 990
 991         /* ignore invalid targets */
 992         if (cmd->device->id >= acb->scsi_host->max_id ||
 993             cmd->device->lun >= acb->scsi_host->max_lun ||
 994             cmd->device->lun >31) {
 995                 goto complete;
 996         }
 997
 998         /* does the specified lun on the specified device exist */
 999         if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1000                 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1001                         cmd->device->id, (u8)cmd->device->lun);
1002                 goto complete;
1003         }
1004
1005         /* do we have a DCB for the device */
1006         dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1007         if (!dcb) {
1008                 /* should never happen */
1009                 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1010                         cmd->device->id, (u8)cmd->device->lun);
1011                 goto complete;
1012         }
1013
1014         /* set callback and clear result in the command */
1015         cmd->scsi_done = done;
1016         cmd->result = 0;
1017
1018         srb = list_first_entry_or_null(&acb->srb_free_list,
1019                         struct ScsiReqBlk, list);
1020         if (!srb) {
1021                 /*
1022                  * Return 1 since we are unable to queue this command at this
1023                  * point in time.
1024                  */
1025                 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1026                 return 1;
1027         }
1028         list_del(&srb->list);
1029
1030         build_srb(cmd, dcb, srb);
1031
1032         if (!list_empty(&dcb->srb_waiting_list)) {
1033                 /* append to waiting queue */
1034                 list_add_tail(&srb->list, &dcb->srb_waiting_list);
1035                 waiting_process_next(acb);
1036         } else {
1037                 /* process immediately */
1038                 send_srb(acb, srb);
1039         }
1040         dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1041         return 0;
1042
1043 complete:
1044         /*
1045          * Complete the command immediatey, and then return 0 to
1046          * indicate that we have handled the command. This is usually
1047          * done when the commad is for things like non existent
1048          * devices.
1049          */
1050         done(cmd);
1051         return 0;
1052 }
1053
1054 static DEF_SCSI_QCMD(dc395x_queue_command)
1055
1056 /*
1057  * Return the disk geometry for the given SCSI device.
1058  */
1059 static int dc395x_bios_param(struct scsi_device *sdev,
1060                 struct block_device *bdev, sector_t capacity, int *info)
1061 {
1062 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1063         int heads, sectors, cylinders;
1064         struct AdapterCtlBlk *acb;
1065         int size = capacity;
1066
1067         dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1068         acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1069         heads = 64;
1070         sectors = 32;
1071         cylinders = size / (heads * sectors);
1072
1073         if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1074                 heads = 255;
1075                 sectors = 63;
1076                 cylinders = size / (heads * sectors);
1077         }
1078         geom[0] = heads;
1079         geom[1] = sectors;
1080         geom[2] = cylinders;
1081         return 0;
1082 #else
1083         return scsicam_bios_param(bdev, capacity, info);
1084 #endif
1085 }
1086
1087
1088 static void dump_register_info(struct AdapterCtlBlk *acb,
1089                 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1090 {
1091         u16 pstat;
1092         struct pci_dev *dev = acb->dev;
1093         pci_read_config_word(dev, PCI_STATUS, &pstat);
1094         if (!dcb)
1095                 dcb = acb->active_dcb;
1096         if (!srb && dcb)
1097                 srb = dcb->active_srb;
1098         if (srb) {
1099                 if (!srb->cmd)
1100                         dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1101                                 srb, srb->cmd);
1102                 else
1103                         dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1104                                  "cmnd=0x%02x <%02i-%i>\n",
1105                                 srb, srb->cmd,
1106                                 srb->cmd->cmnd[0], srb->cmd->device->id,
1107                                 (u8)srb->cmd->device->lun);
1108                 printk("  sglist=%p cnt=%i idx=%i len=%zu\n",
1109                        srb->segment_x, srb->sg_count, srb->sg_index,
1110                        srb->total_xfer_length);
1111                 printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1112                        srb->state, srb->status, srb->scsi_phase,
1113                        (acb->active_dcb) ? "" : "not");
1114         }
1115         dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1116                 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1117                 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1118                 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1119                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1120                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1121                 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1122                 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1123                 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1124                 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1125                 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1126                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1127                 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1128                 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1129                 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1130                 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1131                 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1132         dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1133                 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1134                 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1135                 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1136                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1137                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1138                 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1139                 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1140                 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1141                 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1142                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1143                 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1144                 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1145         dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1146                 "pci{status=0x%04x}\n",
1147                 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1148                 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1149                 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1150                 pstat);
1151 }
1152
1153
1154 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1155 {
1156 #if debug_enabled(DBG_FIFO)
1157         u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1158         u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1159         if (!(fifocnt & 0x40))
1160                 dprintkdbg(DBG_FIFO,
1161                         "clear_fifo: (%i bytes) on phase %02x in %s\n",
1162                         fifocnt & 0x3f, lines, txt);
1163 #endif
1164         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1165 }
1166
1167
1168 static void reset_dev_param(struct AdapterCtlBlk *acb)
1169 {
1170         struct DeviceCtlBlk *dcb;
1171         struct NvRamType *eeprom = &acb->eeprom;
1172         dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1173
1174         list_for_each_entry(dcb, &acb->dcb_list, list) {
1175                 u8 period_index;
1176
1177                 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1178                 dcb->sync_period = 0;
1179                 dcb->sync_offset = 0;
1180
1181                 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1182                 period_index = eeprom->target[dcb->target_id].period & 0x07;
1183                 dcb->min_nego_period = clock_period[period_index];
1184                 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1185                     || !(acb->config & HCC_WIDE_CARD))
1186                         dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1187         }
1188 }
1189
1190
1191 /*
1192  * perform a hard reset on the SCSI bus
1193  * @cmd - some command for this host (for fetching hooks)
1194  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1195  */
1196 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1197 {
1198         struct AdapterCtlBlk *acb =
1199                 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1200         dprintkl(KERN_INFO,
1201                 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1202                 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1203
1204         if (timer_pending(&acb->waiting_timer))
1205                 del_timer(&acb->waiting_timer);
1206
1207         /*
1208          * disable interrupt
1209          */
1210         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1211         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1212         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1213         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1214
1215         reset_scsi_bus(acb);
1216         udelay(500);
1217
1218         /* We may be in serious trouble. Wait some seconds */
1219         acb->last_reset =
1220             jiffies + 3 * HZ / 2 +
1221             HZ * acb->eeprom.delay_time;
1222
1223         /*
1224          * re-enable interrupt
1225          */
1226         /* Clear SCSI FIFO          */
1227         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1228         clear_fifo(acb, "eh_bus_reset");
1229         /* Delete pending IRQ */
1230         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1231         set_basic_config(acb);
1232
1233         reset_dev_param(acb);
1234         doing_srb_done(acb, DID_RESET, cmd, 0);
1235         acb->active_dcb = NULL;
1236         acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1237         waiting_process_next(acb);
1238
1239         return SUCCESS;
1240 }
1241
1242 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1243 {
1244         int rc;
1245
1246         spin_lock_irq(cmd->device->host->host_lock);
1247         rc = __dc395x_eh_bus_reset(cmd);
1248         spin_unlock_irq(cmd->device->host->host_lock);
1249
1250         return rc;
1251 }
1252
1253 /*
1254  * abort an errant SCSI command
1255  * @cmd - command to be aborted
1256  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1257  */
1258 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1259 {
1260         /*
1261          * Look into our command queues: If it has not been sent already,
1262          * we remove it and return success. Otherwise fail.
1263          */
1264         struct AdapterCtlBlk *acb =
1265             (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1266         struct DeviceCtlBlk *dcb;
1267         struct ScsiReqBlk *srb;
1268         dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1269                 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1270
1271         dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1272         if (!dcb) {
1273                 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1274                 return FAILED;
1275         }
1276
1277         srb = find_cmd(cmd, &dcb->srb_waiting_list);
1278         if (srb) {
1279                 list_del(&srb->list);
1280                 pci_unmap_srb_sense(acb, srb);
1281                 pci_unmap_srb(acb, srb);
1282                 free_tag(dcb, srb);
1283                 list_add_tail(&srb->list, &acb->srb_free_list);
1284                 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1285                 cmd->result = DID_ABORT << 16;
1286                 return SUCCESS;
1287         }
1288         srb = find_cmd(cmd, &dcb->srb_going_list);
1289         if (srb) {
1290                 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1291                 /* XXX: Should abort the command here */
1292         } else {
1293                 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1294         }
1295         return FAILED;
1296 }
1297
1298
1299 /* SDTR */
1300 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1301                 struct ScsiReqBlk *srb)
1302 {
1303         u8 *ptr = srb->msgout_buf + srb->msg_count;
1304         if (srb->msg_count > 1) {
1305                 dprintkl(KERN_INFO,
1306                         "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1307                         srb->msg_count, srb->msgout_buf[0],
1308                         srb->msgout_buf[1]);
1309                 return;
1310         }
1311         if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1312                 dcb->sync_offset = 0;
1313                 dcb->min_nego_period = 200 >> 2;
1314         } else if (dcb->sync_offset == 0)
1315                 dcb->sync_offset = SYNC_NEGO_OFFSET;
1316
1317         *ptr++ = MSG_EXTENDED;  /* (01h) */
1318         *ptr++ = 3;             /* length */
1319         *ptr++ = EXTENDED_SDTR; /* (01h) */
1320         *ptr++ = dcb->min_nego_period;  /* Transfer period (in 4ns) */
1321         *ptr++ = dcb->sync_offset;      /* Transfer period (max. REQ/ACK dist) */
1322         srb->msg_count += 5;
1323         srb->state |= SRB_DO_SYNC_NEGO;
1324 }
1325
1326
1327 /* WDTR */
1328 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1329                 struct ScsiReqBlk *srb)
1330 {
1331         u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1332                    (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1333         u8 *ptr = srb->msgout_buf + srb->msg_count;
1334         if (srb->msg_count > 1) {
1335                 dprintkl(KERN_INFO,
1336                         "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1337                         srb->msg_count, srb->msgout_buf[0],
1338                         srb->msgout_buf[1]);
1339                 return;
1340         }
1341         *ptr++ = MSG_EXTENDED;  /* (01h) */
1342         *ptr++ = 2;             /* length */
1343         *ptr++ = EXTENDED_WDTR; /* (03h) */
1344         *ptr++ = wide;
1345         srb->msg_count += 4;
1346         srb->state |= SRB_DO_WIDE_NEGO;
1347 }
1348
1349
1350 #if 0
1351 /* Timer to work around chip flaw: When selecting and the bus is
1352  * busy, we sometimes miss a Selection timeout IRQ */
1353 void selection_timeout_missed(unsigned long ptr);
1354 /* Sets the timer to wake us up */
1355 static void selto_timer(struct AdapterCtlBlk *acb)
1356 {
1357         if (timer_pending(&acb->selto_timer))
1358                 return;
1359         acb->selto_timer.function = selection_timeout_missed;
1360         acb->selto_timer.data = (unsigned long) acb;
1361         if (time_before
1362             (jiffies + HZ, acb->last_reset + HZ / 2))
1363                 acb->selto_timer.expires =
1364                     acb->last_reset + HZ / 2 + 1;
1365         else
1366                 acb->selto_timer.expires = jiffies + HZ + 1;
1367         add_timer(&acb->selto_timer);
1368 }
1369
1370
1371 void selection_timeout_missed(unsigned long ptr)
1372 {
1373         unsigned long flags;
1374         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1375         struct ScsiReqBlk *srb;
1376         dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1377         if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1378                 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1379                 return;
1380         }
1381         DC395x_LOCK_IO(acb->scsi_host, flags);
1382         srb = acb->active_dcb->active_srb;
1383         disconnect(acb);
1384         DC395x_UNLOCK_IO(acb->scsi_host, flags);
1385 }
1386 #endif
1387
1388
1389 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1390                 struct ScsiReqBlk* srb)
1391 {
1392         u16 s_stat2, return_code;
1393         u8 s_stat, scsicommand, i, identify_message;
1394         u8 *ptr;
1395         dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1396                 dcb->target_id, dcb->target_lun, srb);
1397
1398         srb->tag_number = TAG_NONE;     /* acb->tag_max_num: had error read in eeprom */
1399
1400         s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1401         s_stat2 = 0;
1402         s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1403 #if 1
1404         if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1405                 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1406                         s_stat, s_stat2);
1407                 /*
1408                  * Try anyway?
1409                  *
1410                  * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1411                  * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1412                  * (This is likely to be a bug in the hardware. Obviously, most people
1413                  *  only have one initiator per SCSI bus.)
1414                  * Instead let this fail and have the timer make sure the command is
1415                  * tried again after a short time
1416                  */
1417                 /*selto_timer (acb); */
1418                 return 1;
1419         }
1420 #endif
1421         if (acb->active_dcb) {
1422                 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1423                         "command while another command (0x%p) is active.",
1424                         srb->cmd,
1425                         acb->active_dcb->active_srb ?
1426                             acb->active_dcb->active_srb->cmd : 0);
1427                 return 1;
1428         }
1429         if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1430                 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1431                 return 1;
1432         }
1433         /* Allow starting of SCSI commands half a second before we allow the mid-level
1434          * to queue them again after a reset */
1435         if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1436                 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1437                 return 1;
1438         }
1439
1440         /* Flush FIFO */
1441         clear_fifo(acb, "start_scsi");
1442         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1443         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1444         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1445         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1446         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1447
1448         identify_message = dcb->identify_msg;
1449         /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1450         /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1451         if (srb->flag & AUTO_REQSENSE)
1452                 identify_message &= 0xBF;
1453
1454         if (((srb->cmd->cmnd[0] == INQUIRY)
1455              || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1456              || (srb->flag & AUTO_REQSENSE))
1457             && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1458                  && !(dcb->sync_mode & WIDE_NEGO_DONE))
1459                 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1460                     && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1461             && (dcb->target_lun == 0)) {
1462                 srb->msgout_buf[0] = identify_message;
1463                 srb->msg_count = 1;
1464                 scsicommand = SCMD_SEL_ATNSTOP;
1465                 srb->state = SRB_MSGOUT;
1466 #ifndef SYNC_FIRST
1467                 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1468                     && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1469                         build_wdtr(acb, dcb, srb);
1470                         goto no_cmd;
1471                 }
1472 #endif
1473                 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1474                     && dcb->inquiry7 & SCSI_INQ_SYNC) {
1475                         build_sdtr(acb, dcb, srb);
1476                         goto no_cmd;
1477                 }
1478                 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1479                     && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1480                         build_wdtr(acb, dcb, srb);
1481                         goto no_cmd;
1482                 }
1483                 srb->msg_count = 0;
1484         }
1485         /* Send identify message */
1486         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1487
1488         scsicommand = SCMD_SEL_ATN;
1489         srb->state = SRB_START_;
1490 #ifndef DC395x_NO_TAGQ
1491         if ((dcb->sync_mode & EN_TAG_QUEUEING)
1492             && (identify_message & 0xC0)) {
1493                 /* Send Tag message */
1494                 u32 tag_mask = 1;
1495                 u8 tag_number = 0;
1496                 while (tag_mask & dcb->tag_mask
1497                        && tag_number < dcb->max_command) {
1498                         tag_mask = tag_mask << 1;
1499                         tag_number++;
1500                 }
1501                 if (tag_number >= dcb->max_command) {
1502                         dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1503                                 "Out of tags target=<%02i-%i>)\n",
1504                                 srb->cmd, srb->cmd->device->id,
1505                                 (u8)srb->cmd->device->lun);
1506                         srb->state = SRB_READY;
1507                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1508                                        DO_HWRESELECT);
1509                         return 1;
1510                 }
1511                 /* Send Tag id */
1512                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1513                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1514                 dcb->tag_mask |= tag_mask;
1515                 srb->tag_number = tag_number;
1516                 scsicommand = SCMD_SEL_ATN3;
1517                 srb->state = SRB_START_;
1518         }
1519 #endif
1520 /*polling:*/
1521         /* Send CDB ..command block ......... */
1522         dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1523                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1524                 srb->cmd->cmnd[0], srb->tag_number);
1525         if (srb->flag & AUTO_REQSENSE) {
1526                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1527                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1528                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1529                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1530                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1531                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1532         } else {
1533                 ptr = (u8 *)srb->cmd->cmnd;
1534                 for (i = 0; i < srb->cmd->cmd_len; i++)
1535                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1536         }
1537       no_cmd:
1538         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1539                        DO_HWRESELECT | DO_DATALATCH);
1540         if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1541                 /*
1542                  * If start_scsi return 1:
1543                  * we caught an interrupt (must be reset or reselection ... )
1544                  * : Let's process it first!
1545                  */
1546                 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1547                         srb->cmd, dcb->target_id, dcb->target_lun);
1548                 srb->state = SRB_READY;
1549                 free_tag(dcb, srb);
1550                 srb->msg_count = 0;
1551                 return_code = 1;
1552                 /* This IRQ should NOT get lost, as we did not acknowledge it */
1553         } else {
1554                 /*
1555                  * If start_scsi returns 0:
1556                  * we know that the SCSI processor is free
1557                  */
1558                 srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1559                 dcb->active_srb = srb;
1560                 acb->active_dcb = dcb;
1561                 return_code = 0;
1562                 /* it's important for atn stop */
1563                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1564                                DO_DATALATCH | DO_HWRESELECT);
1565                 /* SCSI command */
1566                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1567         }
1568         return return_code;
1569 }
1570
1571
1572 #define DC395x_ENABLE_MSGOUT \
1573  DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1574  srb->state |= SRB_MSGOUT
1575
1576
1577 /* abort command */
1578 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1579                 struct ScsiReqBlk *srb)
1580 {
1581         srb->msgout_buf[0] = ABORT;
1582         srb->msg_count = 1;
1583         DC395x_ENABLE_MSGOUT;
1584         srb->state &= ~SRB_MSGIN;
1585         srb->state |= SRB_MSGOUT;
1586 }
1587
1588
1589 /**
1590  * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1591  *                           have been triggered for this card.
1592  *
1593  * @acb:         a pointer to the adpter control block
1594  * @scsi_status: the status return when we checked the card
1595  **/
1596 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1597                 u16 scsi_status)
1598 {
1599         struct DeviceCtlBlk *dcb;
1600         struct ScsiReqBlk *srb;
1601         u16 phase;
1602         u8 scsi_intstatus;
1603         unsigned long flags;
1604         void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1605                               u16 *);
1606
1607         DC395x_LOCK_IO(acb->scsi_host, flags);
1608
1609         /* This acknowledges the IRQ */
1610         scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1611         if ((scsi_status & 0x2007) == 0x2002)
1612                 dprintkl(KERN_DEBUG,
1613                         "COP after COP completed? %04x\n", scsi_status);
1614         if (debug_enabled(DBG_KG)) {
1615                 if (scsi_intstatus & INT_SELTIMEOUT)
1616                         dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1617         }
1618         /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1619
1620         if (timer_pending(&acb->selto_timer))
1621                 del_timer(&acb->selto_timer);
1622
1623         if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1624                 disconnect(acb);        /* bus free interrupt  */
1625                 goto out_unlock;
1626         }
1627         if (scsi_intstatus & INT_RESELECTED) {
1628                 reselect(acb);
1629                 goto out_unlock;
1630         }
1631         if (scsi_intstatus & INT_SELECT) {
1632                 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1633                 goto out_unlock;
1634         }
1635         if (scsi_intstatus & INT_SCSIRESET) {
1636                 scsi_reset_detect(acb);
1637                 goto out_unlock;
1638         }
1639         if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1640                 dcb = acb->active_dcb;
1641                 if (!dcb) {
1642                         dprintkl(KERN_DEBUG,
1643                                 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1644                                 scsi_status, scsi_intstatus);
1645                         goto out_unlock;
1646                 }
1647                 srb = dcb->active_srb;
1648                 if (dcb->flag & ABORT_DEV_) {
1649                         dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1650                         enable_msgout_abort(acb, srb);
1651                 }
1652
1653                 /* software sequential machine */
1654                 phase = (u16)srb->scsi_phase;
1655
1656                 /*
1657                  * 62037 or 62137
1658                  * call  dc395x_scsi_phase0[]... "phase entry"
1659                  * handle every phase before start transfer
1660                  */
1661                 /* data_out_phase0,     phase:0 */
1662                 /* data_in_phase0,      phase:1 */
1663                 /* command_phase0,      phase:2 */
1664                 /* status_phase0,       phase:3 */
1665                 /* nop0,                phase:4 PH_BUS_FREE .. initial phase */
1666                 /* nop0,                phase:5 PH_BUS_FREE .. initial phase */
1667                 /* msgout_phase0,       phase:6 */
1668                 /* msgin_phase0,        phase:7 */
1669                 dc395x_statev = dc395x_scsi_phase0[phase];
1670                 dc395x_statev(acb, srb, &scsi_status);
1671
1672                 /*
1673                  * if there were any exception occurred scsi_status
1674                  * will be modify to bus free phase new scsi_status
1675                  * transfer out from ... previous dc395x_statev
1676                  */
1677                 srb->scsi_phase = scsi_status & PHASEMASK;
1678                 phase = (u16)scsi_status & PHASEMASK;
1679
1680                 /*
1681                  * call  dc395x_scsi_phase1[]... "phase entry" handle
1682                  * every phase to do transfer
1683                  */
1684                 /* data_out_phase1,     phase:0 */
1685                 /* data_in_phase1,      phase:1 */
1686                 /* command_phase1,      phase:2 */
1687                 /* status_phase1,       phase:3 */
1688                 /* nop1,                phase:4 PH_BUS_FREE .. initial phase */
1689                 /* nop1,                phase:5 PH_BUS_FREE .. initial phase */
1690                 /* msgout_phase1,       phase:6 */
1691                 /* msgin_phase1,        phase:7 */
1692                 dc395x_statev = dc395x_scsi_phase1[phase];
1693                 dc395x_statev(acb, srb, &scsi_status);
1694         }
1695       out_unlock:
1696         DC395x_UNLOCK_IO(acb->scsi_host, flags);
1697 }
1698
1699
1700 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1701 {
1702         struct AdapterCtlBlk *acb = dev_id;
1703         u16 scsi_status;
1704         u8 dma_status;
1705         irqreturn_t handled = IRQ_NONE;
1706
1707         /*
1708          * Check for pending interrupt
1709          */
1710         scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1711         dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1712         if (scsi_status & SCSIINTERRUPT) {
1713                 /* interrupt pending - let's process it! */
1714                 dc395x_handle_interrupt(acb, scsi_status);
1715                 handled = IRQ_HANDLED;
1716         }
1717         else if (dma_status & 0x20) {
1718                 /* Error from the DMA engine */
1719                 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1720 #if 0
1721                 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1722                 if (acb->active_dcb) {
1723                         acb->active_dcb-> flag |= ABORT_DEV_;
1724                         if (acb->active_dcb->active_srb)
1725                                 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1726                 }
1727                 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1728 #else
1729                 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1730                 acb = NULL;
1731 #endif
1732                 handled = IRQ_HANDLED;
1733         }
1734
1735         return handled;
1736 }
1737
1738
1739 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1740                 u16 *pscsi_status)
1741 {
1742         dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1743         if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1744                 *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
1745
1746         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
1747         srb->state &= ~SRB_MSGOUT;
1748 }
1749
1750
1751 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1752                 u16 *pscsi_status)
1753 {
1754         u16 i;
1755         u8 *ptr;
1756         dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1757
1758         clear_fifo(acb, "msgout_phase1");
1759         if (!(srb->state & SRB_MSGOUT)) {
1760                 srb->state |= SRB_MSGOUT;
1761                 dprintkl(KERN_DEBUG,
1762                         "msgout_phase1: (0x%p) Phase unexpected\n",
1763                         srb->cmd);      /* So what ? */
1764         }
1765         if (!srb->msg_count) {
1766                 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1767                         srb->cmd);
1768                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1769                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
1770                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1771                 return;
1772         }
1773         ptr = (u8 *)srb->msgout_buf;
1774         for (i = 0; i < srb->msg_count; i++)
1775                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1776         srb->msg_count = 0;
1777         if (srb->msgout_buf[0] == MSG_ABORT)
1778                 srb->state = SRB_ABORT_SENT;
1779
1780         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1781 }
1782
1783
1784 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1785                 u16 *pscsi_status)
1786 {
1787         dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1788         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1789 }
1790
1791
1792 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1793                 u16 *pscsi_status)
1794 {
1795         struct DeviceCtlBlk *dcb;
1796         u8 *ptr;
1797         u16 i;
1798         dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1799
1800         clear_fifo(acb, "command_phase1");
1801         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1802         if (!(srb->flag & AUTO_REQSENSE)) {
1803                 ptr = (u8 *)srb->cmd->cmnd;
1804                 for (i = 0; i < srb->cmd->cmd_len; i++) {
1805                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1806                         ptr++;
1807                 }
1808         } else {
1809                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1810                 dcb = acb->active_dcb;
1811                 /* target id */
1812                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1813                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1814                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1815                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1816                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1817         }
1818         srb->state |= SRB_COMMAND;
1819         /* it's important for atn stop */
1820         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1821         /* SCSI command */
1822         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1823 }
1824
1825
1826 /*
1827  * Verify that the remaining space in the hw sg lists is the same as
1828  * the count of remaining bytes in srb->total_xfer_length
1829  */
1830 static void sg_verify_length(struct ScsiReqBlk *srb)
1831 {
1832         if (debug_enabled(DBG_SG)) {
1833                 unsigned len = 0;
1834                 unsigned idx = srb->sg_index;
1835                 struct SGentry *psge = srb->segment_x + idx;
1836                 for (; idx < srb->sg_count; psge++, idx++)
1837                         len += psge->length;
1838                 if (len != srb->total_xfer_length)
1839                         dprintkdbg(DBG_SG,
1840                                "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1841                                srb->total_xfer_length, len);
1842         }
1843 }
1844
1845
1846 /*
1847  * Compute the next Scatter Gather list index and adjust its length
1848  * and address if necessary
1849  */
1850 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1851 {
1852         u8 idx;
1853         u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1854         struct SGentry *psge = srb->segment_x + srb->sg_index;
1855
1856         dprintkdbg(DBG_0,
1857                 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1858                 xferred, srb->total_xfer_length, left);
1859         if (xferred == 0) {
1860                 /* nothing to update since we did not transfer any data */
1861                 return;
1862         }
1863
1864         sg_verify_length(srb);
1865         srb->total_xfer_length = left;  /* update remaining count */
1866         for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1867                 if (xferred >= psge->length) {
1868                         /* Complete SG entries done */
1869                         xferred -= psge->length;
1870                 } else {
1871                         /* Partial SG entry done */
1872                         dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev,
1873                                         srb->sg_bus_addr, SEGMENTX_LEN,
1874                                         DMA_TO_DEVICE);
1875                         psge->length -= xferred;
1876                         psge->address += xferred;
1877                         srb->sg_index = idx;
1878                         dma_sync_single_for_device(&srb->dcb->acb->dev->dev,
1879                                         srb->sg_bus_addr, SEGMENTX_LEN,
1880                                         DMA_TO_DEVICE);
1881                         break;
1882                 }
1883                 psge++;
1884         }
1885         sg_verify_length(srb);
1886 }
1887
1888
1889 /*
1890  * We have transferred a single byte (PIO mode?) and need to update
1891  * the count of bytes remaining (total_xfer_length) and update the sg
1892  * entry to either point to next byte in the current sg entry, or of
1893  * already at the end to point to the start of the next sg entry
1894  */
1895 static void sg_subtract_one(struct ScsiReqBlk *srb)
1896 {
1897         sg_update_list(srb, srb->total_xfer_length - 1);
1898 }
1899
1900
1901 /*
1902  * cleanup_after_transfer
1903  *
1904  * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
1905  * KG: Currently called from  StatusPhase1 ()
1906  * Should probably also be called from other places
1907  * Best might be to call it in DataXXPhase0, if new phase will differ
1908  */
1909 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
1910                 struct ScsiReqBlk *srb)
1911 {
1912         /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
1913         if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {       /* read */
1914                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1915                         clear_fifo(acb, "cleanup/in");
1916                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1917                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1918         } else {                /* write */
1919                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
1920                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1921                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
1922                         clear_fifo(acb, "cleanup/out");
1923         }
1924         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1925 }
1926
1927
1928 /*
1929  * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
1930  * Seems to be needed for unknown reasons; could be a hardware bug :-(
1931  */
1932 #define DC395x_LASTPIO 4
1933
1934
1935 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1936                 u16 *pscsi_status)
1937 {
1938         struct DeviceCtlBlk *dcb = srb->dcb;
1939         u16 scsi_status = *pscsi_status;
1940         u32 d_left_counter = 0;
1941         dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
1942                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
1943
1944         /*
1945          * KG: We need to drain the buffers before we draw any conclusions!
1946          * This means telling the DMA to push the rest into SCSI, telling
1947          * SCSI to push the rest to the bus.
1948          * However, the device might have been the one to stop us (phase
1949          * change), and the data in transit just needs to be accounted so
1950          * it can be retransmitted.)
1951          */
1952         /*
1953          * KG: Stop DMA engine pushing more data into the SCSI FIFO
1954          * If we need more data, the DMA SG list will be freshly set up, anyway
1955          */
1956         dprintkdbg(DBG_PIO, "data_out_phase0: "
1957                 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
1958                 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
1959                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1960                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1961                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1962                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
1963                 srb->total_xfer_length);
1964         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
1965
1966         if (!(srb->state & SRB_XFERPAD)) {
1967                 if (scsi_status & PARITYERROR)
1968                         srb->status |= PARITY_ERROR;
1969
1970                 /*
1971                  * KG: Right, we can't just rely on the SCSI_COUNTER, because this
1972                  * is the no of bytes it got from the DMA engine not the no it
1973                  * transferred successfully to the device. (And the difference could
1974                  * be as much as the FIFO size, I guess ...)
1975                  */
1976                 if (!(scsi_status & SCSIXFERDONE)) {
1977                         /*
1978                          * when data transfer from DMA FIFO to SCSI FIFO
1979                          * if there was some data left in SCSI FIFO
1980                          */
1981                         d_left_counter =
1982                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
1983                                   0x1F);
1984                         if (dcb->sync_period & WIDE_SYNC)
1985                                 d_left_counter <<= 1;
1986
1987                         dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
1988                                 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
1989                                 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
1990                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1991                                 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
1992                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1993                                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1994                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1995                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1996                                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
1997                 }
1998                 /*
1999                  * calculate all the residue data that not yet tranfered
2000                  * SCSI transfer counter + left in SCSI FIFO data
2001                  *
2002                  * .....TRM_S1040_SCSI_COUNTER (24bits)
2003                  * The counter always decrement by one for every SCSI byte transfer.
2004                  * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2005                  * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2006                  */
2007                 if (srb->total_xfer_length > DC395x_LASTPIO)
2008                         d_left_counter +=
2009                             DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2010
2011                 /* Is this a good idea? */
2012                 /*clear_fifo(acb, "DOP1"); */
2013                 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2014                 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2015                     && scsi_bufflen(srb->cmd) % 2) {
2016                         d_left_counter = 0;
2017                         dprintkl(KERN_INFO,
2018                                 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2019                                 scsi_status);
2020                 }
2021                 /*
2022                  * KG: Oops again. Same thinko as above: The SCSI might have been
2023                  * faster than the DMA engine, so that it ran out of data.
2024                  * In that case, we have to do just nothing!
2025                  * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2026                  */
2027                 /*
2028                  * KG: This is nonsense: We have been WRITING data to the bus
2029                  * If the SCSI engine has no bytes left, how should the DMA engine?
2030                  */
2031                 if (d_left_counter == 0) {
2032                         srb->total_xfer_length = 0;
2033                 } else {
2034                         /*
2035                          * if transfer not yet complete
2036                          * there were some data residue in SCSI FIFO or
2037                          * SCSI transfer counter not empty
2038                          */
2039                         long oldxferred =
2040                             srb->total_xfer_length - d_left_counter;
2041                         const int diff =
2042                             (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2043                         sg_update_list(srb, d_left_counter);
2044                         /* KG: Most ugly hack! Apparently, this works around a chip bug */
2045                         if ((srb->segment_x[srb->sg_index].length ==
2046                              diff && scsi_sg_count(srb->cmd))
2047                             || ((oldxferred & ~PAGE_MASK) ==
2048                                 (PAGE_SIZE - diff))
2049                             ) {
2050                                 dprintkl(KERN_INFO, "data_out_phase0: "
2051                                         "Work around chip bug (%i)?\n", diff);
2052                                 d_left_counter =
2053                                     srb->total_xfer_length - diff;
2054                                 sg_update_list(srb, d_left_counter);
2055                                 /*srb->total_xfer_length -= diff; */
2056                                 /*srb->virt_addr += diff; */
2057                                 /*if (srb->cmd->use_sg) */
2058                                 /*      srb->sg_index++; */
2059                         }
2060                 }
2061         }
2062         if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2063                 cleanup_after_transfer(acb, srb);
2064         }
2065 }
2066
2067
2068 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2069                 u16 *pscsi_status)
2070 {
2071         dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2072                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2073         clear_fifo(acb, "data_out_phase1");
2074         /* do prepare before transfer when data out phase */
2075         data_io_transfer(acb, srb, XFERDATAOUT);
2076 }
2077
2078 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2079                 u16 *pscsi_status)
2080 {
2081         u16 scsi_status = *pscsi_status;
2082
2083         dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2084                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2085
2086         /*
2087          * KG: DataIn is much more tricky than DataOut. When the device is finished
2088          * and switches to another phase, the SCSI engine should be finished too.
2089          * But: There might still be bytes left in its FIFO to be fetched by the DMA
2090          * engine and transferred to memory.
2091          * We should wait for the FIFOs to be emptied by that (is there any way to
2092          * enforce this?) and then stop the DMA engine, because it might think, that
2093          * there are more bytes to follow. Yes, the device might disconnect prior to
2094          * having all bytes transferred!
2095          * Also we should make sure that all data from the DMA engine buffer's really
2096          * made its way to the system memory! Some documentation on this would not
2097          * seem to be a bad idea, actually.
2098          */
2099         if (!(srb->state & SRB_XFERPAD)) {
2100                 u32 d_left_counter;
2101                 unsigned int sc, fc;
2102
2103                 if (scsi_status & PARITYERROR) {
2104                         dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2105                                 "Parity Error\n", srb->cmd);
2106                         srb->status |= PARITY_ERROR;
2107                 }
2108                 /*
2109                  * KG: We should wait for the DMA FIFO to be empty ...
2110                  * but: it would be better to wait first for the SCSI FIFO and then the
2111                  * the DMA FIFO to become empty? How do we know, that the device not already
2112                  * sent data to the FIFO in a MsgIn phase, eg.?
2113                  */
2114                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2115 #if 0
2116                         int ctr = 6000000;
2117                         dprintkl(KERN_DEBUG,
2118                                 "DIP0: Wait for DMA FIFO to flush ...\n");
2119                         /*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2120                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2121                         /*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2122                         while (!
2123                                (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2124                                 0x80) && --ctr);
2125                         if (ctr < 6000000 - 1)
2126                                 dprintkl(KERN_DEBUG
2127                                        "DIP0: Had to wait for DMA ...\n");
2128                         if (!ctr)
2129                                 dprintkl(KERN_ERR,
2130                                        "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2131                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2132 #endif
2133                         dprintkdbg(DBG_KG, "data_in_phase0: "
2134                                 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2135                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2136                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2137                 }
2138                 /* Now: Check remainig data: The SCSI counters should tell us ... */
2139                 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2140                 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2141                 d_left_counter = sc + ((fc & 0x1f)
2142                        << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2143                            0));
2144                 dprintkdbg(DBG_KG, "data_in_phase0: "
2145                         "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2146                         "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2147                         "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2148                         fc,
2149                         (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2150                         sc,
2151                         fc,
2152                         DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2153                         DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2154                         srb->total_xfer_length, d_left_counter);
2155 #if DC395x_LASTPIO
2156                 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2157                 if (d_left_counter
2158                     && srb->total_xfer_length <= DC395x_LASTPIO) {
2159                         size_t left_io = srb->total_xfer_length;
2160
2161                         /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2162                         /*sg_update_list (srb, d_left_counter); */
2163                         dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2164                                    "for remaining %i bytes:",
2165                                 fc & 0x1f,
2166                                 (srb->dcb->sync_period & WIDE_SYNC) ?
2167                                     "words" : "bytes",
2168                                 srb->total_xfer_length);
2169                         if (srb->dcb->sync_period & WIDE_SYNC)
2170                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2171                                               CFG2_WIDEFIFO);
2172                         while (left_io) {
2173                                 unsigned char *virt, *base = NULL;
2174                                 unsigned long flags = 0;
2175                                 size_t len = left_io;
2176                                 size_t offset = srb->request_length - left_io;
2177
2178                                 local_irq_save(flags);
2179                                 /* Assumption: it's inside one page as it's at most 4 bytes and
2180                                    I just assume it's on a 4-byte boundary */
2181                                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2182                                                            srb->sg_count, &offset, &len);
2183                                 virt = base + offset;
2184
2185                                 left_io -= len;
2186
2187                                 while (len) {
2188                                         u8 byte;
2189                                         byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2190                                         *virt++ = byte;
2191
2192                                         if (debug_enabled(DBG_PIO))
2193                                                 printk(" %02x", byte);
2194
2195                                         d_left_counter--;
2196                                         sg_subtract_one(srb);
2197
2198                                         len--;
2199
2200                                         fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2201
2202                                         if (fc == 0x40) {
2203                                                 left_io = 0;
2204                                                 break;
2205                                         }
2206                                 }
2207
2208                                 WARN_ON((fc != 0x40) == !d_left_counter);
2209
2210                                 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2211                                         /* Read the last byte ... */
2212                                         if (srb->total_xfer_length > 0) {
2213                                                 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2214
2215                                                 *virt++ = byte;
2216                                                 srb->total_xfer_length--;
2217                                                 if (debug_enabled(DBG_PIO))
2218                                                         printk(" %02x", byte);
2219                                         }
2220
2221                                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2222                                 }
2223
2224                                 scsi_kunmap_atomic_sg(base);
2225                                 local_irq_restore(flags);
2226                         }
2227                         /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2228                         /*srb->total_xfer_length = 0; */
2229                         if (debug_enabled(DBG_PIO))
2230                                 printk("\n");
2231                 }
2232 #endif                          /* DC395x_LASTPIO */
2233
2234 #if 0
2235                 /*
2236                  * KG: This was in DATAOUT. Does it also belong here?
2237                  * Nobody seems to know what counter and fifo_cnt count exactly ...
2238                  */
2239                 if (!(scsi_status & SCSIXFERDONE)) {
2240                         /*
2241                          * when data transfer from DMA FIFO to SCSI FIFO
2242                          * if there was some data left in SCSI FIFO
2243                          */
2244                         d_left_counter =
2245                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2246                                   0x1F);
2247                         if (srb->dcb->sync_period & WIDE_SYNC)
2248                                 d_left_counter <<= 1;
2249                         /*
2250                          * if WIDE scsi SCSI FIFOCNT unit is word !!!
2251                          * so need to *= 2
2252                          * KG: Seems to be correct ...
2253                          */
2254                 }
2255 #endif
2256                 /* KG: This should not be needed any more! */
2257                 if (d_left_counter == 0
2258                     || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2259 #if 0
2260                         int ctr = 6000000;
2261                         u8 TempDMAstatus;
2262                         do {
2263                                 TempDMAstatus =
2264                                     DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2265                         } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2266                         if (!ctr)
2267                                 dprintkl(KERN_ERR,
2268                                        "Deadlock in DataInPhase0 waiting for DMA!!\n");
2269                         srb->total_xfer_length = 0;
2270 #endif
2271                         srb->total_xfer_length = d_left_counter;
2272                 } else {        /* phase changed */
2273                         /*
2274                          * parsing the case:
2275                          * when a transfer not yet complete
2276                          * but be disconnected by target
2277                          * if transfer not yet complete
2278                          * there were some data residue in SCSI FIFO or
2279                          * SCSI transfer counter not empty
2280                          */
2281                         sg_update_list(srb, d_left_counter);
2282                 }
2283         }
2284         /* KG: The target may decide to disconnect: Empty FIFO before! */
2285         if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2286                 cleanup_after_transfer(acb, srb);
2287         }
2288 }
2289
2290
2291 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2292                 u16 *pscsi_status)
2293 {
2294         dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2295                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2296         data_io_transfer(acb, srb, XFERDATAIN);
2297 }
2298
2299
2300 static void data_io_transfer(struct AdapterCtlBlk *acb,
2301                 struct ScsiReqBlk *srb, u16 io_dir)
2302 {
2303         struct DeviceCtlBlk *dcb = srb->dcb;
2304         u8 bval;
2305         dprintkdbg(DBG_0,
2306                 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2307                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2308                 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2309                 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2310         if (srb == acb->tmp_srb)
2311                 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2312         if (srb->sg_index >= srb->sg_count) {
2313                 /* can't happen? out of bounds error */
2314                 return;
2315         }
2316
2317         if (srb->total_xfer_length > DC395x_LASTPIO) {
2318                 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2319                 /*
2320                  * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2321                  * Maybe, even ABORTXFER would be appropriate
2322                  */
2323                 if (dma_status & XFERPENDING) {
2324                         dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2325                                 "Expect trouble!\n");
2326                         dump_register_info(acb, dcb, srb);
2327                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2328                 }
2329                 /* clear_fifo(acb, "IO"); */
2330                 /*
2331                  * load what physical address of Scatter/Gather list table
2332                  * want to be transfer
2333                  */
2334                 srb->state |= SRB_DATA_XFER;
2335                 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2336                 if (scsi_sg_count(srb->cmd)) {  /* with S/G */
2337                         io_dir |= DMACMD_SG;
2338                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2339                                        srb->sg_bus_addr +
2340                                        sizeof(struct SGentry) *
2341                                        srb->sg_index);
2342                         /* load how many bytes in the sg list table */
2343                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2344                                        ((u32)(srb->sg_count -
2345                                               srb->sg_index) << 3));
2346                 } else {        /* without S/G */
2347                         io_dir &= ~DMACMD_SG;
2348                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2349                                        srb->segment_x[0].address);
2350                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2351                                        srb->segment_x[0].length);
2352                 }
2353                 /* load total transfer length (24bits) max value 16Mbyte */
2354                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2355                                srb->total_xfer_length);
2356                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2357                 if (io_dir & DMACMD_DIR) {      /* read */
2358                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2359                                       SCMD_DMA_IN);
2360                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2361                 } else {
2362                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2363                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2364                                       SCMD_DMA_OUT);
2365                 }
2366
2367         }
2368 #if DC395x_LASTPIO
2369         else if (srb->total_xfer_length > 0) {  /* The last four bytes: Do PIO */
2370                 /*
2371                  * load what physical address of Scatter/Gather list table
2372                  * want to be transfer
2373                  */
2374                 srb->state |= SRB_DATA_XFER;
2375                 /* load total transfer length (24bits) max value 16Mbyte */
2376                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2377                                srb->total_xfer_length);
2378                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2379                 if (io_dir & DMACMD_DIR) {      /* read */
2380                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2381                                       SCMD_FIFO_IN);
2382                 } else {        /* write */
2383                         int ln = srb->total_xfer_length;
2384                         size_t left_io = srb->total_xfer_length;
2385
2386                         if (srb->dcb->sync_period & WIDE_SYNC)
2387                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2388                                      CFG2_WIDEFIFO);
2389
2390                         while (left_io) {
2391                                 unsigned char *virt, *base = NULL;
2392                                 unsigned long flags = 0;
2393                                 size_t len = left_io;
2394                                 size_t offset = srb->request_length - left_io;
2395
2396                                 local_irq_save(flags);
2397                                 /* Again, max 4 bytes */
2398                                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2399                                                            srb->sg_count, &offset, &len);
2400                                 virt = base + offset;
2401
2402                                 left_io -= len;
2403
2404                                 while (len--) {
2405                                         if (debug_enabled(DBG_PIO))
2406                                                 printk(" %02x", *virt);
2407
2408                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2409
2410                                         sg_subtract_one(srb);
2411                                 }
2412
2413                                 scsi_kunmap_atomic_sg(base);
2414                                 local_irq_restore(flags);
2415                         }
2416                         if (srb->dcb->sync_period & WIDE_SYNC) {
2417                                 if (ln % 2) {
2418                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2419                                         if (debug_enabled(DBG_PIO))
2420                                                 printk(" |00");
2421                                 }
2422                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2423                         }
2424                         /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2425                         if (debug_enabled(DBG_PIO))
2426                                 printk("\n");
2427                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2428                                           SCMD_FIFO_OUT);
2429                 }
2430         }
2431 #endif                          /* DC395x_LASTPIO */
2432         else {          /* xfer pad */
2433                 u8 data = 0, data2 = 0;
2434                 if (srb->sg_count) {
2435                         srb->adapter_status = H_OVER_UNDER_RUN;
2436                         srb->status |= OVER_RUN;
2437                 }
2438                 /*
2439                  * KG: despite the fact that we are using 16 bits I/O ops
2440                  * the SCSI FIFO is only 8 bits according to the docs
2441                  * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2442                  */
2443                 if (dcb->sync_period & WIDE_SYNC) {
2444                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2445                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2446                                       CFG2_WIDEFIFO);
2447                         if (io_dir & DMACMD_DIR) {
2448                                 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2449                                 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2450                         } else {
2451                                 /* Danger, Robinson: If you find KGs
2452                                  * scattered over the wide disk, the driver
2453                                  * or chip is to blame :-( */
2454                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2455                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2456                         }
2457                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2458                 } else {
2459                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2460                         /* Danger, Robinson: If you find a collection of Ks on your disk
2461                          * something broke :-( */
2462                         if (io_dir & DMACMD_DIR)
2463                                 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2464                         else
2465                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2466                 }
2467                 srb->state |= SRB_XFERPAD;
2468                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2469                 /* SCSI command */
2470                 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2471                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2472         }
2473 }
2474
2475
2476 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2477                 u16 *pscsi_status)
2478 {
2479         dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2480                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2481         srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2482         srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);      /* get message */
2483         srb->state = SRB_COMPLETED;
2484         *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
2485         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2486         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2487 }
2488
2489
2490 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2491                 u16 *pscsi_status)
2492 {
2493         dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2494                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2495         srb->state = SRB_STATUS;
2496         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2497         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2498 }
2499
2500
2501 /* Check if the message is complete */
2502 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2503 {
2504         if (*msgbuf == EXTENDED_MESSAGE) {
2505                 if (len < 2)
2506                         return 0;
2507                 if (len < msgbuf[1] + 2)
2508                         return 0;
2509         } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)  /* two byte messages */
2510                 if (len < 2)
2511                         return 0;
2512         return 1;
2513 }
2514
2515 /* reject_msg */
2516 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2517                 struct ScsiReqBlk *srb)
2518 {
2519         srb->msgout_buf[0] = MESSAGE_REJECT;
2520         srb->msg_count = 1;
2521         DC395x_ENABLE_MSGOUT;
2522         srb->state &= ~SRB_MSGIN;
2523         srb->state |= SRB_MSGOUT;
2524         dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2525                 srb->msgin_buf[0],
2526                 srb->dcb->target_id, srb->dcb->target_lun);
2527 }
2528
2529
2530 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2531                 struct DeviceCtlBlk *dcb, u8 tag)
2532 {
2533         struct ScsiReqBlk *srb = NULL;
2534         struct ScsiReqBlk *i;
2535         dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2536                    srb->cmd, tag, srb);
2537
2538         if (!(dcb->tag_mask & (1 << tag)))
2539                 dprintkl(KERN_DEBUG,
2540                         "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2541                         dcb->tag_mask, tag);
2542
2543         if (list_empty(&dcb->srb_going_list))
2544                 goto mingx0;
2545         list_for_each_entry(i, &dcb->srb_going_list, list) {
2546                 if (i->tag_number == tag) {
2547                         srb = i;
2548                         break;
2549                 }
2550         }
2551         if (!srb)
2552                 goto mingx0;
2553
2554         dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2555                 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2556         if (dcb->flag & ABORT_DEV_) {
2557                 /*srb->state = SRB_ABORT_SENT; */
2558                 enable_msgout_abort(acb, srb);
2559         }
2560
2561         if (!(srb->state & SRB_DISCONNECT))
2562                 goto mingx0;
2563
2564         memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2565         srb->state |= dcb->active_srb->state;
2566         srb->state |= SRB_DATA_XFER;
2567         dcb->active_srb = srb;
2568         /* How can we make the DORS happy? */
2569         return srb;
2570
2571       mingx0:
2572         srb = acb->tmp_srb;
2573         srb->state = SRB_UNEXPECT_RESEL;
2574         dcb->active_srb = srb;
2575         srb->msgout_buf[0] = MSG_ABORT_TAG;
2576         srb->msg_count = 1;
2577         DC395x_ENABLE_MSGOUT;
2578         dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2579         return srb;
2580 }
2581
2582
2583 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2584                 struct DeviceCtlBlk *dcb)
2585 {
2586         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2587         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2588         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2589         set_xfer_rate(acb, dcb);
2590 }
2591
2592
2593 /* set async transfer mode */
2594 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2595 {
2596         struct DeviceCtlBlk *dcb = srb->dcb;
2597         dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2598                 dcb->target_id, dcb->target_lun);
2599
2600         dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2601         dcb->sync_mode |= SYNC_NEGO_DONE;
2602         /*dcb->sync_period &= 0; */
2603         dcb->sync_offset = 0;
2604         dcb->min_nego_period = 200 >> 2;        /* 200ns <=> 5 MHz */
2605         srb->state &= ~SRB_DO_SYNC_NEGO;
2606         reprogram_regs(acb, dcb);
2607         if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2608             && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2609                 build_wdtr(acb, dcb, srb);
2610                 DC395x_ENABLE_MSGOUT;
2611                 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2612         }
2613 }
2614
2615
2616 /* set sync transfer mode */
2617 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2618 {
2619         struct DeviceCtlBlk *dcb = srb->dcb;
2620         u8 bval;
2621         int fact;
2622         dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2623                 "(%02i.%01i MHz) Offset %i\n",
2624                 dcb->target_id, srb->msgin_buf[3] << 2,
2625                 (250 / srb->msgin_buf[3]),
2626                 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2627                 srb->msgin_buf[4]);
2628
2629         if (srb->msgin_buf[4] > 15)
2630                 srb->msgin_buf[4] = 15;
2631         if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2632                 dcb->sync_offset = 0;
2633         else if (dcb->sync_offset == 0)
2634                 dcb->sync_offset = srb->msgin_buf[4];
2635         if (srb->msgin_buf[4] > dcb->sync_offset)
2636                 srb->msgin_buf[4] = dcb->sync_offset;
2637         else
2638                 dcb->sync_offset = srb->msgin_buf[4];
2639         bval = 0;
2640         while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2641                             || dcb->min_nego_period >
2642                             clock_period[bval]))
2643                 bval++;
2644         if (srb->msgin_buf[3] < clock_period[bval])
2645                 dprintkl(KERN_INFO,
2646                         "msgin_set_sync: Increase sync nego period to %ins\n",
2647                         clock_period[bval] << 2);
2648         srb->msgin_buf[3] = clock_period[bval];
2649         dcb->sync_period &= 0xf0;
2650         dcb->sync_period |= ALT_SYNC | bval;
2651         dcb->min_nego_period = srb->msgin_buf[3];
2652
2653         if (dcb->sync_period & WIDE_SYNC)
2654                 fact = 500;
2655         else
2656                 fact = 250;
2657
2658         dprintkl(KERN_INFO,
2659                 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2660                 dcb->target_id, (fact == 500) ? "Wide16" : "",
2661                 dcb->min_nego_period << 2, dcb->sync_offset,
2662                 (fact / dcb->min_nego_period),
2663                 ((fact % dcb->min_nego_period) * 10 +
2664                 dcb->min_nego_period / 2) / dcb->min_nego_period);
2665
2666         if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2667                 /* Reply with corrected SDTR Message */
2668                 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2669                         srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2670
2671                 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2672                 srb->msg_count = 5;
2673                 DC395x_ENABLE_MSGOUT;
2674                 dcb->sync_mode |= SYNC_NEGO_DONE;
2675         } else {
2676                 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2677                     && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2678                         build_wdtr(acb, dcb, srb);
2679                         DC395x_ENABLE_MSGOUT;
2680                         dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2681                 }
2682         }
2683         srb->state &= ~SRB_DO_SYNC_NEGO;
2684         dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2685
2686         reprogram_regs(acb, dcb);
2687 }
2688
2689
2690 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2691                 struct ScsiReqBlk *srb)
2692 {
2693         struct DeviceCtlBlk *dcb = srb->dcb;
2694         dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2695
2696         dcb->sync_period &= ~WIDE_SYNC;
2697         dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2698         dcb->sync_mode |= WIDE_NEGO_DONE;
2699         srb->state &= ~SRB_DO_WIDE_NEGO;
2700         reprogram_regs(acb, dcb);
2701         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2702             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2703                 build_sdtr(acb, dcb, srb);
2704                 DC395x_ENABLE_MSGOUT;
2705                 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2706         }
2707 }
2708
2709 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2710 {
2711         struct DeviceCtlBlk *dcb = srb->dcb;
2712         u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2713                    && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2714         dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2715
2716         if (srb->msgin_buf[3] > wide)
2717                 srb->msgin_buf[3] = wide;
2718         /* Completed */
2719         if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2720                 dprintkl(KERN_DEBUG,
2721                         "msgin_set_wide: Wide nego initiated <%02i>\n",
2722                         dcb->target_id);
2723                 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2724                 srb->msg_count = 4;
2725                 srb->state |= SRB_DO_WIDE_NEGO;
2726                 DC395x_ENABLE_MSGOUT;
2727         }
2728
2729         dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2730         if (srb->msgin_buf[3] > 0)
2731                 dcb->sync_period |= WIDE_SYNC;
2732         else
2733                 dcb->sync_period &= ~WIDE_SYNC;
2734         srb->state &= ~SRB_DO_WIDE_NEGO;
2735         /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2736         dprintkdbg(DBG_1,
2737                 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2738                 (8 << srb->msgin_buf[3]), dcb->target_id);
2739         reprogram_regs(acb, dcb);
2740         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2741             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2742                 build_sdtr(acb, dcb, srb);
2743                 DC395x_ENABLE_MSGOUT;
2744                 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2745         }
2746 }
2747
2748
2749 /*
2750  * extended message codes:
2751  *
2752  *      code    description
2753  *
2754  *      02h     Reserved
2755  *      00h     MODIFY DATA  POINTER
2756  *      01h     SYNCHRONOUS DATA TRANSFER REQUEST
2757  *      03h     WIDE DATA TRANSFER REQUEST
2758  *   04h - 7Fh  Reserved
2759  *   80h - FFh  Vendor specific
2760  */
2761 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2762                 u16 *pscsi_status)
2763 {
2764         struct DeviceCtlBlk *dcb = acb->active_dcb;
2765         dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2766
2767         srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2768         if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2769                 /* Now eval the msg */
2770                 switch (srb->msgin_buf[0]) {
2771                 case DISCONNECT:
2772                         srb->state = SRB_DISCONNECT;
2773                         break;
2774
2775                 case SIMPLE_QUEUE_TAG:
2776                 case HEAD_OF_QUEUE_TAG:
2777                 case ORDERED_QUEUE_TAG:
2778                         srb =
2779                             msgin_qtag(acb, dcb,
2780                                               srb->msgin_buf[1]);
2781                         break;
2782
2783                 case MESSAGE_REJECT:
2784                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2785                                        DO_CLRATN | DO_DATALATCH);
2786                         /* A sync nego message was rejected ! */
2787                         if (srb->state & SRB_DO_SYNC_NEGO) {
2788                                 msgin_set_async(acb, srb);
2789                                 break;
2790                         }
2791                         /* A wide nego message was rejected ! */
2792                         if (srb->state & SRB_DO_WIDE_NEGO) {
2793                                 msgin_set_nowide(acb, srb);
2794                                 break;
2795                         }
2796                         enable_msgout_abort(acb, srb);
2797                         /*srb->state |= SRB_ABORT_SENT */
2798                         break;
2799
2800                 case EXTENDED_MESSAGE:
2801                         /* SDTR */
2802                         if (srb->msgin_buf[1] == 3
2803                             && srb->msgin_buf[2] == EXTENDED_SDTR) {
2804                                 msgin_set_sync(acb, srb);
2805                                 break;
2806                         }
2807                         /* WDTR */
2808                         if (srb->msgin_buf[1] == 2
2809                             && srb->msgin_buf[2] == EXTENDED_WDTR
2810                             && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2811                                 msgin_set_wide(acb, srb);
2812                                 break;
2813                         }
2814                         msgin_reject(acb, srb);
2815                         break;
2816
2817                 case MSG_IGNOREWIDE:
2818                         /* Discard  wide residual */
2819                         dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2820                         break;
2821
2822                 case COMMAND_COMPLETE:
2823                         /* nothing has to be done */
2824                         break;
2825
2826                 case SAVE_POINTERS:
2827                         /*
2828                          * SAVE POINTER may be ignored as we have the struct
2829                          * ScsiReqBlk* associated with the scsi command.
2830                          */
2831                         dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2832                                 "SAVE POINTER rem=%i Ignore\n",
2833                                 srb->cmd, srb->total_xfer_length);
2834                         break;
2835
2836                 case RESTORE_POINTERS:
2837                         dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2838                         break;
2839
2840                 case ABORT:
2841                         dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2842                                 "<%02i-%i> ABORT msg\n",
2843                                 srb->cmd, dcb->target_id,
2844                                 dcb->target_lun);
2845                         dcb->flag |= ABORT_DEV_;
2846                         enable_msgout_abort(acb, srb);
2847                         break;
2848
2849                 default:
2850                         /* reject unknown messages */
2851                         if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2852                                 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2853                                 srb->msg_count = 1;
2854                                 srb->msgout_buf[0] = dcb->identify_msg;
2855                                 DC395x_ENABLE_MSGOUT;
2856                                 srb->state |= SRB_MSGOUT;
2857                                 /*break; */
2858                         }
2859                         msgin_reject(acb, srb);
2860                 }
2861
2862                 /* Clear counter and MsgIn state */
2863                 srb->state &= ~SRB_MSGIN;
2864                 acb->msg_len = 0;
2865         }
2866         *pscsi_status = PH_BUS_FREE;
2867         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important ... you know! */
2868         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2869 }
2870
2871
2872 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2873                 u16 *pscsi_status)
2874 {
2875         dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2876         clear_fifo(acb, "msgin_phase1");
2877         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2878         if (!(srb->state & SRB_MSGIN)) {
2879                 srb->state &= ~SRB_DISCONNECT;
2880                 srb->state |= SRB_MSGIN;
2881         }
2882         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2883         /* SCSI command */
2884         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2885 }
2886
2887
2888 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2889                 u16 *pscsi_status)
2890 {
2891 }
2892
2893
2894 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2895                 u16 *pscsi_status)
2896 {
2897 }
2898
2899
2900 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
2901 {
2902         struct DeviceCtlBlk *i;
2903
2904         /* set all lun device's  period, offset */
2905         if (dcb->identify_msg & 0x07)
2906                 return;
2907
2908         if (acb->scan_devices) {
2909                 current_sync_offset = dcb->sync_offset;
2910                 return;
2911         }
2912
2913         list_for_each_entry(i, &acb->dcb_list, list)
2914                 if (i->target_id == dcb->target_id) {
2915                         i->sync_period = dcb->sync_period;
2916                         i->sync_offset = dcb->sync_offset;
2917                         i->sync_mode = dcb->sync_mode;
2918                         i->min_nego_period = dcb->min_nego_period;
2919                 }
2920 }
2921
2922
2923 static void disconnect(struct AdapterCtlBlk *acb)
2924 {
2925         struct DeviceCtlBlk *dcb = acb->active_dcb;
2926         struct ScsiReqBlk *srb;
2927
2928         if (!dcb) {
2929                 dprintkl(KERN_ERR, "disconnect: No such device\n");
2930                 udelay(500);
2931                 /* Suspend queue for a while */
2932                 acb->last_reset =
2933                     jiffies + HZ / 2 +
2934                     HZ * acb->eeprom.delay_time;
2935                 clear_fifo(acb, "disconnectEx");
2936                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2937                 return;
2938         }
2939         srb = dcb->active_srb;
2940         acb->active_dcb = NULL;
2941         dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
2942
2943         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
2944         clear_fifo(acb, "disconnect");
2945         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
2946         if (srb->state & SRB_UNEXPECT_RESEL) {
2947                 dprintkl(KERN_ERR,
2948                         "disconnect: Unexpected reselection <%02i-%i>\n",
2949                         dcb->target_id, dcb->target_lun);
2950                 srb->state = 0;
2951                 waiting_process_next(acb);
2952         } else if (srb->state & SRB_ABORT_SENT) {
2953                 dcb->flag &= ~ABORT_DEV_;
2954                 acb->last_reset = jiffies + HZ / 2 + 1;
2955                 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
2956                 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
2957                 waiting_process_next(acb);
2958         } else {
2959                 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
2960                     || !(srb->
2961                          state & (SRB_DISCONNECT + SRB_COMPLETED))) {
2962                         /*
2963                          * Selection time out
2964                          * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
2965                          */
2966                         /* Unexp. Disc / Sel Timeout */
2967                         if (srb->state != SRB_START_
2968                             && srb->state != SRB_MSGOUT) {
2969                                 srb->state = SRB_READY;
2970                                 dprintkl(KERN_DEBUG,
2971                                         "disconnect: (0x%p) Unexpected\n",
2972                                         srb->cmd);
2973                                 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
2974                                 goto disc1;
2975                         } else {
2976                                 /* Normal selection timeout */
2977                                 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
2978                                         "<%02i-%i> SelTO\n", srb->cmd,
2979                                         dcb->target_id, dcb->target_lun);
2980                                 if (srb->retry_count++ > DC395x_MAX_RETRIES
2981                                     || acb->scan_devices) {
2982                                         srb->target_status =
2983                                             SCSI_STAT_SEL_TIMEOUT;
2984                                         goto disc1;
2985                                 }
2986                                 free_tag(dcb, srb);
2987                                 list_move(&srb->list, &dcb->srb_waiting_list);
2988                                 dprintkdbg(DBG_KG,
2989                                         "disconnect: (0x%p) Retry\n",
2990                                         srb->cmd);
2991                                 waiting_set_timer(acb, HZ / 20);
2992                         }
2993                 } else if (srb->state & SRB_DISCONNECT) {
2994                         u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
2995                         /*
2996                          * SRB_DISCONNECT (This is what we expect!)
2997                          */
2998                         if (bval & 0x40) {
2999                                 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3000                                         " 0x%02x: ACK set! Other controllers?\n",
3001                                         bval);
3002                                 /* It could come from another initiator, therefore don't do much ! */
3003                         } else
3004                                 waiting_process_next(acb);
3005                 } else if (srb->state & SRB_COMPLETED) {
3006                       disc1:
3007                         /*
3008                          ** SRB_COMPLETED
3009                          */
3010                         free_tag(dcb, srb);
3011                         dcb->active_srb = NULL;
3012                         srb->state = SRB_FREE;
3013                         srb_done(acb, dcb, srb);
3014                 }
3015         }
3016 }
3017
3018
3019 static void reselect(struct AdapterCtlBlk *acb)
3020 {
3021         struct DeviceCtlBlk *dcb = acb->active_dcb;
3022         struct ScsiReqBlk *srb = NULL;
3023         u16 rsel_tar_lun_id;
3024         u8 id, lun;
3025         u8 arblostflag = 0;
3026         dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3027
3028         clear_fifo(acb, "reselect");
3029         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3030         /* Read Reselected Target ID and LUN */
3031         rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3032         if (dcb) {              /* Arbitration lost but Reselection win */
3033                 srb = dcb->active_srb;
3034                 if (!srb) {
3035                         dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3036                                 "but active_srb == NULL\n");
3037                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3038                         return;
3039                 }
3040                 /* Why the if ? */
3041                 if (!acb->scan_devices) {
3042                         dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3043                                 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3044                                 srb->cmd, dcb->target_id,
3045                                 dcb->target_lun, rsel_tar_lun_id,
3046                                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3047                         arblostflag = 1;
3048                         /*srb->state |= SRB_DISCONNECT; */
3049
3050                         srb->state = SRB_READY;
3051                         free_tag(dcb, srb);
3052                         list_move(&srb->list, &dcb->srb_waiting_list);
3053                         waiting_set_timer(acb, HZ / 20);
3054
3055                         /* return; */
3056                 }
3057         }
3058         /* Read Reselected Target Id and LUN */
3059         if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3060                 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3061                         "Got %i!\n", rsel_tar_lun_id);
3062         id = rsel_tar_lun_id & 0xff;
3063         lun = (rsel_tar_lun_id >> 8) & 7;
3064         dcb = find_dcb(acb, id, lun);
3065         if (!dcb) {
3066                 dprintkl(KERN_ERR, "reselect: From non existent device "
3067                         "<%02i-%i>\n", id, lun);
3068                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3069                 return;
3070         }
3071         acb->active_dcb = dcb;
3072
3073         if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3074                 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3075                         "disconnection? <%02i-%i>\n",
3076                         dcb->target_id, dcb->target_lun);
3077
3078         if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3079                 srb = acb->tmp_srb;
3080                 dcb->active_srb = srb;
3081         } else {
3082                 /* There can be only one! */
3083                 srb = dcb->active_srb;
3084                 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3085                         /*
3086                          * abort command
3087                          */
3088                         dprintkl(KERN_DEBUG,
3089                                 "reselect: w/o disconnected cmds <%02i-%i>\n",
3090                                 dcb->target_id, dcb->target_lun);
3091                         srb = acb->tmp_srb;
3092                         srb->state = SRB_UNEXPECT_RESEL;
3093                         dcb->active_srb = srb;
3094                         enable_msgout_abort(acb, srb);
3095                 } else {
3096                         if (dcb->flag & ABORT_DEV_) {
3097                                 /*srb->state = SRB_ABORT_SENT; */
3098                                 enable_msgout_abort(acb, srb);
3099                         } else
3100                                 srb->state = SRB_DATA_XFER;
3101
3102                 }
3103         }
3104         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
3105
3106         /* Program HA ID, target ID, period and offset */
3107         dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3108         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);     /* host   ID */
3109         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);            /* target ID */
3110         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);            /* offset    */
3111         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);              /* sync period, wide */
3112         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);              /* it's important for atn stop */
3113         /* SCSI command */
3114         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3115 }
3116
3117
3118 static inline u8 tagq_blacklist(char *name)
3119 {
3120 #ifndef DC395x_NO_TAGQ
3121 #if 0
3122         u8 i;
3123         for (i = 0; i < BADDEVCNT; i++)
3124                 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3125                         return 1;
3126 #endif
3127         return 0;
3128 #else
3129         return 1;
3130 #endif
3131 }
3132
3133
3134 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3135 {
3136         /* Check for SCSI format (ANSI and Response data format) */
3137         if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3138                 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3139                     && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3140                     /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3141                     /* ((dcb->dev_type == TYPE_DISK)
3142                        || (dcb->dev_type == TYPE_MOD)) && */
3143                     !tagq_blacklist(((char *)ptr) + 8)) {
3144                         if (dcb->max_command == 1)
3145                                 dcb->max_command =
3146                                     dcb->acb->tag_max_num;
3147                         dcb->sync_mode |= EN_TAG_QUEUEING;
3148                         /*dcb->tag_mask = 0; */
3149                 } else
3150                         dcb->max_command = 1;
3151         }
3152 }
3153
3154
3155 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3156                 struct ScsiInqData *ptr)
3157 {
3158         u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3159         dcb->dev_type = bval1;
3160         /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3161         disc_tagq_set(dcb, ptr);
3162 }
3163
3164
3165 /* unmap mapped pci regions from SRB */
3166 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3167 {
3168         struct scsi_cmnd *cmd = srb->cmd;
3169         enum dma_data_direction dir = cmd->sc_data_direction;
3170
3171         if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3172                 /* unmap DC395x SG list */
3173                 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3174                         srb->sg_bus_addr, SEGMENTX_LEN);
3175                 dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN,
3176                                 DMA_TO_DEVICE);
3177                 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3178                            scsi_sg_count(cmd), scsi_bufflen(cmd));
3179                 /* unmap the sg segments */
3180                 scsi_dma_unmap(cmd);
3181         }
3182 }
3183
3184
3185 /* unmap mapped pci sense buffer from SRB */
3186 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3187                 struct ScsiReqBlk *srb)
3188 {
3189         if (!(srb->flag & AUTO_REQSENSE))
3190                 return;
3191         /* Unmap sense buffer */
3192         dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3193                srb->segment_x[0].address);
3194         dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address,
3195                          srb->segment_x[0].length, DMA_FROM_DEVICE);
3196         /* Restore SG stuff */
3197         srb->total_xfer_length = srb->xferred;
3198         srb->segment_x[0].address =
3199             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3200         srb->segment_x[0].length =
3201             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3202 }
3203
3204
3205 /*
3206  * Complete execution of a SCSI command
3207  * Signal completion to the generic SCSI driver
3208  */
3209 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3210                 struct ScsiReqBlk *srb)
3211 {
3212         u8 tempcnt, status;
3213         struct scsi_cmnd *cmd = srb->cmd;
3214         enum dma_data_direction dir = cmd->sc_data_direction;
3215         int ckc_only = 1;
3216
3217         dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3218                 srb->cmd->device->id, (u8)srb->cmd->device->lun);
3219         dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3220                    srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3221                    scsi_sgtalbe(cmd));
3222         status = srb->target_status;
3223         if (srb->flag & AUTO_REQSENSE) {
3224                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3225                 pci_unmap_srb_sense(acb, srb);
3226                 /*
3227                  ** target status..........................
3228                  */
3229                 srb->flag &= ~AUTO_REQSENSE;
3230                 srb->adapter_status = 0;
3231                 srb->target_status = CHECK_CONDITION << 1;
3232                 if (debug_enabled(DBG_1)) {
3233                         switch (cmd->sense_buffer[2] & 0x0f) {
3234                         case NOT_READY:
3235                                 dprintkl(KERN_DEBUG,
3236                                      "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3237                                      cmd->cmnd[0], dcb->target_id,
3238                                      dcb->target_lun, status, acb->scan_devices);
3239                                 break;
3240                         case UNIT_ATTENTION:
3241                                 dprintkl(KERN_DEBUG,
3242                                      "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3243                                      cmd->cmnd[0], dcb->target_id,
3244                                      dcb->target_lun, status, acb->scan_devices);
3245                                 break;
3246                         case ILLEGAL_REQUEST:
3247                                 dprintkl(KERN_DEBUG,
3248                                      "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3249                                      cmd->cmnd[0], dcb->target_id,
3250                                      dcb->target_lun, status, acb->scan_devices);
3251                                 break;
3252                         case MEDIUM_ERROR:
3253                                 dprintkl(KERN_DEBUG,
3254                                      "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3255                                      cmd->cmnd[0], dcb->target_id,
3256                                      dcb->target_lun, status, acb->scan_devices);
3257                                 break;
3258                         case HARDWARE_ERROR:
3259                                 dprintkl(KERN_DEBUG,
3260                                      "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3261                                      cmd->cmnd[0], dcb->target_id,
3262                                      dcb->target_lun, status, acb->scan_devices);
3263                                 break;
3264                         }
3265                         if (cmd->sense_buffer[7] >= 6)
3266                                 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3267                                         "(0x%08x 0x%08x)\n",
3268                                         cmd->sense_buffer[2], cmd->sense_buffer[12],
3269                                         cmd->sense_buffer[13],
3270                                         *((unsigned int *)(cmd->sense_buffer + 3)),
3271                                         *((unsigned int *)(cmd->sense_buffer + 8)));
3272                         else
3273                                 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3274                                         cmd->sense_buffer[2],
3275                                         *((unsigned int *)(cmd->sense_buffer + 3)));
3276                 }
3277
3278                 if (status == (CHECK_CONDITION << 1)) {
3279                         cmd->result = DID_BAD_TARGET << 16;
3280                         goto ckc_e;
3281                 }
3282                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3283
3284                 if (srb->total_xfer_length
3285                     && srb->total_xfer_length >= cmd->underflow)
3286                         cmd->result =
3287                             MK_RES_LNX(DRIVER_SENSE, DID_OK,
3288                                        srb->end_message, CHECK_CONDITION);
3289                 /*SET_RES_DID(cmd->result,DID_OK) */
3290                 else
3291                         cmd->result =
3292                             MK_RES_LNX(DRIVER_SENSE, DID_OK,
3293                                        srb->end_message, CHECK_CONDITION);
3294
3295                 goto ckc_e;
3296         }
3297
3298 /*************************************************************/
3299         if (status) {
3300                 /*
3301                  * target status..........................
3302                  */
3303                 if (status_byte(status) == CHECK_CONDITION) {
3304                         request_sense(acb, dcb, srb);
3305                         return;
3306                 } else if (status_byte(status) == QUEUE_FULL) {
3307                         tempcnt = (u8)list_size(&dcb->srb_going_list);
3308                         dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3309                              dcb->target_id, dcb->target_lun, tempcnt);
3310                         if (tempcnt > 1)
3311                                 tempcnt--;
3312                         dcb->max_command = tempcnt;
3313                         free_tag(dcb, srb);
3314                         list_move(&srb->list, &dcb->srb_waiting_list);
3315                         waiting_set_timer(acb, HZ / 20);
3316                         srb->adapter_status = 0;
3317                         srb->target_status = 0;
3318                         return;
3319                 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3320                         srb->adapter_status = H_SEL_TIMEOUT;
3321                         srb->target_status = 0;
3322                         cmd->result = DID_NO_CONNECT << 16;
3323                 } else {
3324                         srb->adapter_status = 0;
3325                         SET_RES_DID(cmd->result, DID_ERROR);
3326                         SET_RES_MSG(cmd->result, srb->end_message);
3327                         SET_RES_TARGET(cmd->result, status);
3328
3329                 }
3330         } else {
3331                 /*
3332                  ** process initiator status..........................
3333                  */
3334                 status = srb->adapter_status;
3335                 if (status & H_OVER_UNDER_RUN) {
3336                         srb->target_status = 0;
3337                         SET_RES_DID(cmd->result, DID_OK);
3338                         SET_RES_MSG(cmd->result, srb->end_message);
3339                 } else if (srb->status & PARITY_ERROR) {
3340                         SET_RES_DID(cmd->result, DID_PARITY);
3341                         SET_RES_MSG(cmd->result, srb->end_message);
3342                 } else {        /* No error */
3343
3344                         srb->adapter_status = 0;
3345                         srb->target_status = 0;
3346                         SET_RES_DID(cmd->result, DID_OK);
3347                 }
3348         }
3349
3350         ckc_only = 0;
3351 /* Check Error Conditions */
3352       ckc_e:
3353
3354         pci_unmap_srb(acb, srb);
3355
3356         if (cmd->cmnd[0] == INQUIRY) {
3357                 unsigned char *base = NULL;
3358                 struct ScsiInqData *ptr;
3359                 unsigned long flags = 0;
3360                 struct scatterlist* sg = scsi_sglist(cmd);
3361                 size_t offset = 0, len = sizeof(struct ScsiInqData);
3362
3363                 local_irq_save(flags);
3364                 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3365                 ptr = (struct ScsiInqData *)(base + offset);
3366
3367                 if (!ckc_only && (cmd->result & RES_DID) == 0
3368                     && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3369                     && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3370                         dcb->inquiry7 = ptr->Flags;
3371
3372         /*if( srb->cmd->cmnd[0] == INQUIRY && */
3373         /*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3374                 if ((cmd->result == (DID_OK << 16) ||
3375                      status_byte(cmd->result) == CHECK_CONDITION)) {
3376                         if (!dcb->init_tcq_flag) {
3377                                 add_dev(acb, dcb, ptr);
3378                                 dcb->init_tcq_flag = 1;
3379                         }
3380                 }
3381
3382                 scsi_kunmap_atomic_sg(base);
3383                 local_irq_restore(flags);
3384         }
3385
3386         /* Here is the info for Doug Gilbert's sg3 ... */
3387         scsi_set_resid(cmd, srb->total_xfer_length);
3388         /* This may be interpreted by sb. or not ... */
3389         cmd->SCp.this_residual = srb->total_xfer_length;
3390         cmd->SCp.buffers_residual = 0;
3391         if (debug_enabled(DBG_KG)) {
3392                 if (srb->total_xfer_length)
3393                         dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3394                                 "cmnd=0x%02x Missed %i bytes\n",
3395                                 cmd, cmd->device->id, (u8)cmd->device->lun,
3396                                 cmd->cmnd[0], srb->total_xfer_length);
3397         }
3398
3399         if (srb != acb->tmp_srb) {
3400                 /* Add to free list */
3401                 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3402                         cmd, cmd->result);
3403                 list_move_tail(&srb->list, &acb->srb_free_list);
3404         } else {
3405                 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3406         }
3407
3408         cmd->scsi_done(cmd);
3409         waiting_process_next(acb);
3410 }
3411
3412
3413 /* abort all cmds in our queues */
3414 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3415                 struct scsi_cmnd *cmd, u8 force)
3416 {
3417         struct DeviceCtlBlk *dcb;
3418         dprintkl(KERN_INFO, "doing_srb_done: pids ");
3419
3420         list_for_each_entry(dcb, &acb->dcb_list, list) {
3421                 struct ScsiReqBlk *srb;
3422                 struct ScsiReqBlk *tmp;
3423                 struct scsi_cmnd *p;
3424
3425                 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3426                         enum dma_data_direction dir;
3427                         int result;
3428
3429                         p = srb->cmd;
3430                         dir = p->sc_data_direction;
3431                         result = MK_RES(0, did_flag, 0, 0);
3432                         printk("G:%p(%02i-%i) ", p,
3433                                p->device->id, (u8)p->device->lun);
3434                         list_del(&srb->list);
3435                         free_tag(dcb, srb);
3436                         list_add_tail(&srb->list, &acb->srb_free_list);
3437                         p->result = result;
3438                         pci_unmap_srb_sense(acb, srb);
3439                         pci_unmap_srb(acb, srb);
3440                         if (force) {
3441                                 /* For new EH, we normally don't need to give commands back,
3442                                  * as they all complete or all time out */
3443                                 p->scsi_done(p);
3444                         }
3445                 }
3446                 if (!list_empty(&dcb->srb_going_list))
3447                         dprintkl(KERN_DEBUG,
3448                                "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3449                                dcb->target_id, dcb->target_lun);
3450                 if (dcb->tag_mask)
3451                         dprintkl(KERN_DEBUG,
3452                                "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3453                                dcb->target_id, dcb->target_lun,
3454                                dcb->tag_mask);
3455
3456                 /* Waiting queue */
3457                 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3458                         int result;
3459                         p = srb->cmd;
3460
3461                         result = MK_RES(0, did_flag, 0, 0);
3462                         printk("W:%p<%02i-%i>", p, p->device->id,
3463                                (u8)p->device->lun);
3464                         list_move_tail(&srb->list, &acb->srb_free_list);
3465                         p->result = result;
3466                         pci_unmap_srb_sense(acb, srb);
3467                         pci_unmap_srb(acb, srb);
3468                         if (force) {
3469                                 /* For new EH, we normally don't need to give commands back,
3470                                  * as they all complete or all time out */
3471                                 cmd->scsi_done(cmd);
3472                         }
3473                 }
3474                 if (!list_empty(&dcb->srb_waiting_list))
3475                         dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3476                              list_size(&dcb->srb_waiting_list), dcb->target_id,
3477                              dcb->target_lun);
3478                 dcb->flag &= ~ABORT_DEV_;
3479         }
3480         printk("\n");
3481 }
3482
3483
3484 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3485 {
3486         dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3487         acb->acb_flag |= RESET_DEV;     /* RESET_DETECT, RESET_DONE, RESET_DEV */
3488         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3489
3490         while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3491                 /* nothing */;
3492 }
3493
3494
3495 static void set_basic_config(struct AdapterCtlBlk *acb)
3496 {
3497         u8 bval;
3498         u16 wval;
3499         DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3500         if (acb->config & HCC_PARITY)
3501                 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3502         else
3503                 bval = PHASELATCH | INITIATOR | BLOCKRST;
3504
3505         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3506
3507         /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3508         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);       /* was 0x13: default */
3509         /* program Host ID                  */
3510         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3511         /* set ansynchronous transfer       */
3512         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3513         /* Turn LED control off */
3514         wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3515         DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3516         /* DMA config          */
3517         wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3518         wval |=
3519             DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3520         DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3521         /* Clear pending interrupt status */
3522         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3523         /* Enable SCSI interrupt    */
3524         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3525         DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3526                       /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3527                       );
3528 }
3529
3530
3531 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3532 {
3533         dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3534         /* delay half a second */
3535         if (timer_pending(&acb->waiting_timer))
3536                 del_timer(&acb->waiting_timer);
3537
3538         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3539         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3540         /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3541         udelay(500);
3542         /* Maybe we locked up the bus? Then lets wait even longer ... */
3543         acb->last_reset =
3544             jiffies + 5 * HZ / 2 +
3545             HZ * acb->eeprom.delay_time;
3546
3547         clear_fifo(acb, "scsi_reset_detect");
3548         set_basic_config(acb);
3549         /*1.25 */
3550         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3551
3552         if (acb->acb_flag & RESET_DEV) {        /* RESET_DETECT, RESET_DONE, RESET_DEV */
3553                 acb->acb_flag |= RESET_DONE;
3554         } else {
3555                 acb->acb_flag |= RESET_DETECT;
3556                 reset_dev_param(acb);
3557                 doing_srb_done(acb, DID_RESET, NULL, 1);
3558                 /*DC395x_RecoverSRB( acb ); */
3559                 acb->active_dcb = NULL;
3560                 acb->acb_flag = 0;
3561                 waiting_process_next(acb);
3562         }
3563 }
3564
3565
3566 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3567                 struct ScsiReqBlk *srb)
3568 {
3569         struct scsi_cmnd *cmd = srb->cmd;
3570         dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3571                 cmd, cmd->device->id, (u8)cmd->device->lun);
3572
3573         srb->flag |= AUTO_REQSENSE;
3574         srb->adapter_status = 0;
3575         srb->target_status = 0;
3576
3577         /* KG: Can this prevent crap sense data ? */
3578         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3579
3580         /* Save some data */
3581         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3582             srb->segment_x[0].address;
3583         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3584             srb->segment_x[0].length;
3585         srb->xferred = srb->total_xfer_length;
3586         /* srb->segment_x : a one entry of S/G list table */
3587         srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3588         srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3589         /* Map sense buffer */
3590         srb->segment_x[0].address = dma_map_single(&acb->dev->dev,
3591                         cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
3592                         DMA_FROM_DEVICE);
3593         dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3594                cmd->sense_buffer, srb->segment_x[0].address,
3595                SCSI_SENSE_BUFFERSIZE);
3596         srb->sg_count = 1;
3597         srb->sg_index = 0;
3598
3599         if (start_scsi(acb, dcb, srb)) {        /* Should only happen, if sb. else grabs the bus */
3600                 dprintkl(KERN_DEBUG,
3601                         "request_sense: (0x%p) failed <%02i-%i>\n",
3602                         srb->cmd, dcb->target_id, dcb->target_lun);
3603                 list_move(&srb->list, &dcb->srb_waiting_list);
3604                 waiting_set_timer(acb, HZ / 100);
3605         }
3606 }
3607
3608
3609 /**
3610  * device_alloc - Allocate a new device instance. This create the
3611  * devices instance and sets up all the data items. The adapter
3612  * instance is required to obtain confiuration information for this
3613  * device. This does *not* add this device to the adapters device
3614  * list.
3615  *
3616  * @acb: The adapter to obtain configuration information from.
3617  * @target: The target for the new device.
3618  * @lun: The lun for the new device.
3619  *
3620  * Return the new device if successful or NULL on failure.
3621  **/
3622 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3623                 u8 target, u8 lun)
3624 {
3625         struct NvRamType *eeprom = &acb->eeprom;
3626         u8 period_index = eeprom->target[target].period & 0x07;
3627         struct DeviceCtlBlk *dcb;
3628
3629         dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3630         dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3631         if (!dcb)
3632                 return NULL;
3633         dcb->acb = NULL;
3634         INIT_LIST_HEAD(&dcb->srb_going_list);
3635         INIT_LIST_HEAD(&dcb->srb_waiting_list);
3636         dcb->active_srb = NULL;
3637         dcb->tag_mask = 0;
3638         dcb->max_command = 1;
3639         dcb->target_id = target;
3640         dcb->target_lun = lun;
3641         dcb->dev_mode = eeprom->target[target].cfg0;
3642 #ifndef DC395x_NO_DISCONNECT
3643         dcb->identify_msg =
3644             IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3645 #else
3646         dcb->identify_msg = IDENTIFY(0, lun);
3647 #endif
3648         dcb->inquiry7 = 0;
3649         dcb->sync_mode = 0;
3650         dcb->min_nego_period = clock_period[period_index];
3651         dcb->sync_period = 0;
3652         dcb->sync_offset = 0;
3653         dcb->flag = 0;
3654
3655 #ifndef DC395x_NO_WIDE
3656         if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3657             && (acb->config & HCC_WIDE_CARD))
3658                 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3659 #endif
3660 #ifndef DC395x_NO_SYNC
3661         if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3662                 if (!(lun) || current_sync_offset)
3663                         dcb->sync_mode |= SYNC_NEGO_ENABLE;
3664 #endif
3665         if (dcb->target_lun != 0) {
3666                 /* Copy settings */
3667                 struct DeviceCtlBlk *p;
3668                 list_for_each_entry(p, &acb->dcb_list, list)
3669                         if (p->target_id == dcb->target_id)
3670                                 break;
3671                 dprintkdbg(DBG_1,
3672                        "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3673                        dcb->target_id, dcb->target_lun,
3674                        p->target_id, p->target_lun);
3675                 dcb->sync_mode = p->sync_mode;
3676                 dcb->sync_period = p->sync_period;
3677                 dcb->min_nego_period = p->min_nego_period;
3678                 dcb->sync_offset = p->sync_offset;
3679                 dcb->inquiry7 = p->inquiry7;
3680         }
3681         return dcb;
3682 }
3683
3684
3685 /**
3686  * adapter_add_device - Adds the device instance to the adaptor instance.
3687  *
3688  * @acb: The adapter device to be updated
3689  * @dcb: A newly created and initialised device instance to add.
3690  **/
3691 static void adapter_add_device(struct AdapterCtlBlk *acb,
3692                 struct DeviceCtlBlk *dcb)
3693 {
3694         /* backpointer to adapter */
3695         dcb->acb = acb;
3696
3697         /* set run_robin to this device if it is currently empty */
3698         if (list_empty(&acb->dcb_list))
3699                 acb->dcb_run_robin = dcb;
3700
3701         /* add device to list */
3702         list_add_tail(&dcb->list, &acb->dcb_list);
3703
3704         /* update device maps */
3705         acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3706         acb->children[dcb->target_id][dcb->target_lun] = dcb;
3707 }
3708
3709
3710 /**
3711  * adapter_remove_device - Removes the device instance from the adaptor
3712  * instance. The device instance is not check in any way or freed by this.
3713  * The caller is expected to take care of that. This will simply remove the
3714  * device from the adapters data strcutures.
3715  *
3716  * @acb: The adapter device to be updated
3717  * @dcb: A device that has previously been added to the adapter.
3718  **/
3719 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3720                 struct DeviceCtlBlk *dcb)
3721 {
3722         struct DeviceCtlBlk *i;
3723         struct DeviceCtlBlk *tmp;
3724         dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3725                 dcb->target_id, dcb->target_lun);
3726
3727         /* fix up any pointers to this device that we have in the adapter */
3728         if (acb->active_dcb == dcb)
3729                 acb->active_dcb = NULL;
3730         if (acb->dcb_run_robin == dcb)
3731                 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3732
3733         /* unlink from list */
3734         list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3735                 if (dcb == i) {
3736                         list_del(&i->list);
3737                         break;
3738                 }
3739
3740         /* clear map and children */
3741         acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3742         acb->children[dcb->target_id][dcb->target_lun] = NULL;
3743         dcb->acb = NULL;
3744 }
3745
3746
3747 /**
3748  * adapter_remove_and_free_device - Removes a single device from the adapter
3749  * and then frees the device information.
3750  *
3751  * @acb: The adapter device to be updated
3752  * @dcb: A device that has previously been added to the adapter.
3753  */
3754 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3755                 struct DeviceCtlBlk *dcb)
3756 {
3757         if (list_size(&dcb->srb_going_list) > 1) {
3758                 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3759                            "Won't remove because of %i active requests.\n",
3760                            dcb->target_id, dcb->target_lun,
3761                            list_size(&dcb->srb_going_list));
3762                 return;
3763         }
3764         adapter_remove_device(acb, dcb);
3765         kfree(dcb);
3766 }
3767
3768
3769 /**
3770  * adapter_remove_and_free_all_devices - Removes and frees all of the
3771  * devices associated with the specified adapter.
3772  *
3773  * @acb: The adapter from which all devices should be removed.
3774  **/
3775 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3776 {
3777         struct DeviceCtlBlk *dcb;
3778         struct DeviceCtlBlk *tmp;
3779         dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3780                    list_size(&acb->dcb_list));
3781
3782         list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3783                 adapter_remove_and_free_device(acb, dcb);
3784 }
3785
3786
3787 /**
3788  * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3789  * scsi device that we need to deal with. We allocate a new device and then
3790  * insert that device into the adapters device list.
3791  *
3792  * @scsi_device: The new scsi device that we need to handle.
3793  **/
3794 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3795 {
3796         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3797         struct DeviceCtlBlk *dcb;
3798
3799         dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3800         if (!dcb)
3801                 return -ENOMEM;
3802         adapter_add_device(acb, dcb);
3803
3804         return 0;
3805 }
3806
3807
3808 /**
3809  * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3810  * device that is going away.
3811  *
3812  * @scsi_device: The new scsi device that we need to handle.
3813  **/
3814 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3815 {
3816         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3817         struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3818         if (dcb)
3819                 adapter_remove_and_free_device(acb, dcb);
3820 }
3821
3822
3823
3824
3825 /**
3826  * trms1040_wait_30us: wait for 30 us
3827  *
3828  * Waits for 30us (using the chip by the looks of it..)
3829  *
3830  * @io_port: base I/O address
3831  **/
3832 static void trms1040_wait_30us(unsigned long io_port)
3833 {
3834         /* ScsiPortStallExecution(30); wait 30 us */
3835         outb(5, io_port + TRM_S1040_GEN_TIMER);
3836         while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3837                 /* nothing */ ;
3838 }
3839
3840
3841 /**
3842  * trms1040_write_cmd - write the secified command and address to
3843  * chip
3844  *
3845  * @io_port:    base I/O address
3846  * @cmd:        SB + op code (command) to send
3847  * @addr:       address to send
3848  **/
3849 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3850 {
3851         int i;
3852         u8 send_data;
3853
3854         /* program SB + OP code */
3855         for (i = 0; i < 3; i++, cmd <<= 1) {
3856                 send_data = NVR_SELECT;
3857                 if (cmd & 0x04) /* Start from bit 2 */
3858                         send_data |= NVR_BITOUT;
3859
3860                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3861                 trms1040_wait_30us(io_port);
3862                 outb((send_data | NVR_CLOCK),
3863                      io_port + TRM_S1040_GEN_NVRAM);
3864                 trms1040_wait_30us(io_port);
3865         }
3866
3867         /* send address */
3868         for (i = 0; i < 7; i++, addr <<= 1) {
3869                 send_data = NVR_SELECT;
3870                 if (addr & 0x40)        /* Start from bit 6 */
3871                         send_data |= NVR_BITOUT;
3872
3873                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3874                 trms1040_wait_30us(io_port);
3875                 outb((send_data | NVR_CLOCK),
3876                      io_port + TRM_S1040_GEN_NVRAM);
3877                 trms1040_wait_30us(io_port);
3878         }
3879         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3880         trms1040_wait_30us(io_port);
3881 }
3882
3883
3884 /**
3885  * trms1040_set_data - store a single byte in the eeprom
3886  *
3887  * Called from write all to write a single byte into the SSEEPROM
3888  * Which is done one bit at a time.
3889  *
3890  * @io_port:    base I/O address
3891  * @addr:       offset into EEPROM
3892  * @byte:       bytes to write
3893  **/
3894 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
3895 {
3896         int i;
3897         u8 send_data;
3898
3899         /* Send write command & address */
3900         trms1040_write_cmd(io_port, 0x05, addr);
3901
3902         /* Write data */
3903         for (i = 0; i < 8; i++, byte <<= 1) {
3904                 send_data = NVR_SELECT;
3905                 if (byte & 0x80)        /* Start from bit 7 */
3906                         send_data |= NVR_BITOUT;
3907
3908                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3909                 trms1040_wait_30us(io_port);
3910                 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3911                 trms1040_wait_30us(io_port);
3912         }
3913         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3914         trms1040_wait_30us(io_port);
3915
3916         /* Disable chip select */
3917         outb(0, io_port + TRM_S1040_GEN_NVRAM);
3918         trms1040_wait_30us(io_port);
3919
3920         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3921         trms1040_wait_30us(io_port);
3922
3923         /* Wait for write ready */
3924         while (1) {
3925                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
3926                 trms1040_wait_30us(io_port);
3927
3928                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3929                 trms1040_wait_30us(io_port);
3930
3931                 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
3932                         break;
3933         }
3934
3935         /*  Disable chip select */
3936         outb(0, io_port + TRM_S1040_GEN_NVRAM);
3937 }
3938
3939
3940 /**
3941  * trms1040_write_all - write 128 bytes to the eeprom
3942  *
3943  * Write the supplied 128 bytes to the chips SEEPROM
3944  *
3945  * @eeprom:     the data to write
3946  * @io_port:    the base io port
3947  **/
3948 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
3949 {
3950         u8 *b_eeprom = (u8 *)eeprom;
3951         u8 addr;
3952
3953         /* Enable SEEPROM */
3954         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
3955              io_port + TRM_S1040_GEN_CONTROL);
3956
3957         /* write enable */
3958         trms1040_write_cmd(io_port, 0x04, 0xFF);
3959         outb(0, io_port + TRM_S1040_GEN_NVRAM);
3960         trms1040_wait_30us(io_port);
3961
3962         /* write */
3963         for (addr = 0; addr < 128; addr++, b_eeprom++)
3964                 trms1040_set_data(io_port, addr, *b_eeprom);
3965
3966         /* write disable */
3967         trms1040_write_cmd(io_port, 0x04, 0x00);
3968         outb(0, io_port + TRM_S1040_GEN_NVRAM);
3969         trms1040_wait_30us(io_port);
3970
3971         /* Disable SEEPROM */
3972         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
3973              io_port + TRM_S1040_GEN_CONTROL);
3974 }
3975
3976
3977 /**
3978  * trms1040_get_data - get a single byte from the eeprom
3979  *
3980  * Called from read all to read a single byte into the SSEEPROM
3981  * Which is done one bit at a time.
3982  *
3983  * @io_port:    base I/O address
3984  * @addr:       offset into SEEPROM
3985  *
3986  * Returns the byte read.
3987  **/
3988 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
3989 {
3990         int i;
3991         u8 read_byte;
3992         u8 result = 0;
3993
3994         /* Send read command & address */
3995         trms1040_write_cmd(io_port, 0x06, addr);
3996
3997         /* read data */
3998         for (i = 0; i < 8; i++) {
3999                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4000                 trms1040_wait_30us(io_port);
4001                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4002
4003                 /* Get data bit while falling edge */
4004                 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4005                 result <<= 1;
4006                 if (read_byte & NVR_BITIN)
4007                         result |= 1;
4008
4009                 trms1040_wait_30us(io_port);
4010         }
4011
4012         /* Disable chip select */
4013         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4014         return result;
4015 }
4016
4017
4018 /**
4019  * trms1040_read_all - read all bytes from the eeprom
4020  *
4021  * Read the 128 bytes from the SEEPROM.
4022  *
4023  * @eeprom:     where to store the data
4024  * @io_port:    the base io port
4025  **/
4026 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4027 {
4028         u8 *b_eeprom = (u8 *)eeprom;
4029         u8 addr;
4030
4031         /* Enable SEEPROM */
4032         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4033              io_port + TRM_S1040_GEN_CONTROL);
4034
4035         /* read details */
4036         for (addr = 0; addr < 128; addr++, b_eeprom++)
4037                 *b_eeprom = trms1040_get_data(io_port, addr);
4038
4039         /* Disable SEEPROM */
4040         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4041              io_port + TRM_S1040_GEN_CONTROL);
4042 }
4043
4044
4045
4046 /**
4047  * check_eeprom - get and check contents of the eeprom
4048  *
4049  * Read seeprom 128 bytes into the memory provider in eeprom.
4050  * Checks the checksum and if it's not correct it uses a set of default
4051  * values.
4052  *
4053  * @eeprom:     caller allocated strcuture to read the eeprom data into
4054  * @io_port:    io port to read from
4055  **/
4056 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4057 {
4058         u16 *w_eeprom = (u16 *)eeprom;
4059         u16 w_addr;
4060         u16 cksum;
4061         u32 d_addr;
4062         u32 *d_eeprom;
4063
4064         trms1040_read_all(eeprom, io_port);     /* read eeprom */
4065
4066         cksum = 0;
4067         for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4068              w_addr++, w_eeprom++)
4069                 cksum += *w_eeprom;
4070         if (cksum != 0x1234) {
4071                 /*
4072                  * Checksum is wrong.
4073                  * Load a set of defaults into the eeprom buffer
4074                  */
4075                 dprintkl(KERN_WARNING,
4076                         "EEProm checksum error: using default values and options.\n");
4077                 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4078                 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4079                 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4080                 eeprom->sub_sys_id[1] =
4081                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4082                 eeprom->sub_class = 0x00;
4083                 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4084                 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4085                 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4086                 eeprom->device_id[1] =
4087                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4088                 eeprom->reserved = 0x00;
4089
4090                 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4091                      d_addr < 16; d_addr++, d_eeprom++)
4092                         *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4093
4094                 *d_eeprom++ = 0x04000F07;       /* max_tag,delay_time,channel_cfg,scsi_id */
4095                 *d_eeprom++ = 0x00000015;       /* reserved1,boot_lun,boot_target,reserved0 */
4096                 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4097                         *d_eeprom = 0x00;
4098
4099                 /* Now load defaults (maybe set by boot/module params) */
4100                 set_safe_settings();
4101                 fix_settings();
4102                 eeprom_override(eeprom);
4103
4104                 eeprom->cksum = 0x00;
4105                 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4106                      w_addr < 63; w_addr++, w_eeprom++)
4107                         cksum += *w_eeprom;
4108
4109                 *w_eeprom = 0x1234 - cksum;
4110                 trms1040_write_all(eeprom, io_port);
4111                 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4112         } else {
4113                 set_safe_settings();
4114                 eeprom_index_to_delay(eeprom);
4115                 eeprom_override(eeprom);
4116         }
4117 }
4118
4119
4120 /**
4121  * print_eeprom_settings - output the eeprom settings
4122  * to the kernel log so people can see what they were.
4123  *
4124  * @eeprom: The eeprom data strucutre to show details for.
4125  **/
4126 static void print_eeprom_settings(struct NvRamType *eeprom)
4127 {
4128         dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4129                 eeprom->scsi_id,
4130                 eeprom->target[0].period,
4131                 clock_speed[eeprom->target[0].period] / 10,
4132                 clock_speed[eeprom->target[0].period] % 10,
4133                 eeprom->target[0].cfg0);
4134         dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4135                 eeprom->channel_cfg, eeprom->max_tag,
4136                 1 << eeprom->max_tag, eeprom->delay_time);
4137 }
4138
4139
4140 /* Free SG tables */
4141 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4142 {
4143         int i;
4144         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4145
4146         for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4147                 kfree(acb->srb_array[i].segment_x);
4148 }
4149
4150
4151 /*
4152  * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4153  * should never cross a page boundary */
4154 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4155 {
4156         const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4157                                     *SEGMENTX_LEN;
4158         int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4159         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4160         int srb_idx = 0;
4161         unsigned i = 0;
4162         struct SGentry *uninitialized_var(ptr);
4163
4164         for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4165                 acb->srb_array[i].segment_x = NULL;
4166
4167         dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4168         while (pages--) {
4169                 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4170                 if (!ptr) {
4171                         adapter_sg_tables_free(acb);
4172                         return 1;
4173                 }
4174                 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4175                         PAGE_SIZE, ptr, srb_idx);
4176                 i = 0;
4177                 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4178                         acb->srb_array[srb_idx++].segment_x =
4179                             ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4180         }
4181         if (i < srbs_per_page)
4182                 acb->srb.segment_x =
4183                     ptr + (i * DC395x_MAX_SG_LISTENTRY);
4184         else
4185                 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4186         return 0;
4187 }
4188
4189
4190
4191 /**
4192  * adapter_print_config - print adapter connection and termination
4193  * config
4194  *
4195  * The io port in the adapter needs to have been set before calling
4196  * this function.
4197  *
4198  * @acb: The adapter to print the information for.
4199  **/
4200 static void adapter_print_config(struct AdapterCtlBlk *acb)
4201 {
4202         u8 bval;
4203
4204         bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4205         dprintkl(KERN_INFO, "%sConnectors: ",
4206                 ((bval & WIDESCSI) ? "(Wide) " : ""));
4207         if (!(bval & CON5068))
4208                 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4209         if (!(bval & CON68))
4210                 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4211         if (!(bval & CON50))
4212                 printk("int50 ");
4213         if ((bval & (CON5068 | CON50 | CON68)) ==
4214             0 /*(CON5068 | CON50 | CON68) */ )
4215                 printk(" Oops! (All 3?) ");
4216         bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4217         printk(" Termination: ");
4218         if (bval & DIS_TERM)
4219                 printk("Disabled\n");
4220         else {
4221                 if (bval & AUTOTERM)
4222                         printk("Auto ");
4223                 if (bval & LOW8TERM)
4224                         printk("Low ");
4225                 if (bval & UP8TERM)
4226                         printk("High ");
4227                 printk("\n");
4228         }
4229 }
4230
4231
4232 /**
4233  * adapter_init_params - Initialize the various parameters in the
4234  * adapter structure. Note that the pointer to the scsi_host is set
4235  * early (when this instance is created) and the io_port and irq
4236  * values are set later after they have been reserved. This just gets
4237  * everything set to a good starting position.
4238  *
4239  * The eeprom structure in the adapter needs to have been set before
4240  * calling this function.
4241  *
4242  * @acb: The adapter to initialize.
4243  **/
4244 static void adapter_init_params(struct AdapterCtlBlk *acb)
4245 {
4246         struct NvRamType *eeprom = &acb->eeprom;
4247         int i;
4248
4249         /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4250         /* NOTE: acb->io_port_base is set at port registration time */
4251         /* NOTE: acb->io_port_len is set at port registration time */
4252
4253         INIT_LIST_HEAD(&acb->dcb_list);
4254         acb->dcb_run_robin = NULL;
4255         acb->active_dcb = NULL;
4256
4257         INIT_LIST_HEAD(&acb->srb_free_list);
4258         /*  temp SRB for Q tag used or abort command used  */
4259         acb->tmp_srb = &acb->srb;
4260         timer_setup(&acb->waiting_timer, waiting_timeout, 0);
4261         timer_setup(&acb->selto_timer, NULL, 0);
4262
4263         acb->srb_count = DC395x_MAX_SRB_CNT;
4264
4265         acb->sel_timeout = DC395x_SEL_TIMEOUT;  /* timeout=250ms */
4266         /* NOTE: acb->irq_level is set at IRQ registration time */
4267
4268         acb->tag_max_num = 1 << eeprom->max_tag;
4269         if (acb->tag_max_num > 30)
4270                 acb->tag_max_num = 30;
4271
4272         acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE, RESET_DEV */
4273         acb->gmode2 = eeprom->channel_cfg;
4274         acb->config = 0;        /* NOTE: actually set in adapter_init_chip */
4275
4276         if (eeprom->channel_cfg & NAC_SCANLUN)
4277                 acb->lun_chk = 1;
4278         acb->scan_devices = 1;
4279
4280         acb->scsi_host->this_id = eeprom->scsi_id;
4281         acb->hostid_bit = (1 << acb->scsi_host->this_id);
4282
4283         for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4284                 acb->dcb_map[i] = 0;
4285
4286         acb->msg_len = 0;
4287
4288         /* link static array of srbs into the srb free list */
4289         for (i = 0; i < acb->srb_count - 1; i++)
4290                 list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list);
4291 }
4292
4293
4294 /**
4295  * adapter_init_host - Initialize the scsi host instance based on
4296  * values that we have already stored in the adapter instance. There's
4297  * some mention that a lot of these are deprecated, so we won't use
4298  * them (we'll use the ones in the adapter instance) but we'll fill
4299  * them in in case something else needs them.
4300  *
4301  * The eeprom structure, irq and io ports in the adapter need to have
4302  * been set before calling this function.
4303  *
4304  * @host: The scsi host instance to fill in the values for.
4305  **/
4306 static void adapter_init_scsi_host(struct Scsi_Host *host)
4307 {
4308         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4309         struct NvRamType *eeprom = &acb->eeprom;
4310
4311         host->max_cmd_len = 24;
4312         host->can_queue = DC395x_MAX_CMD_QUEUE;
4313         host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4314         host->this_id = (int)eeprom->scsi_id;
4315         host->io_port = acb->io_port_base;
4316         host->n_io_port = acb->io_port_len;
4317         host->dma_channel = -1;
4318         host->unique_id = acb->io_port_base;
4319         host->irq = acb->irq_level;
4320         acb->last_reset = jiffies;
4321
4322         host->max_id = 16;
4323         if (host->max_id - 1 == eeprom->scsi_id)
4324                 host->max_id--;
4325
4326         if (eeprom->channel_cfg & NAC_SCANLUN)
4327                 host->max_lun = 8;
4328         else
4329                 host->max_lun = 1;
4330 }
4331
4332
4333 /**
4334  * adapter_init_chip - Get the chip into a know state and figure out
4335  * some of the settings that apply to this adapter.
4336  *
4337  * The io port in the adapter needs to have been set before calling
4338  * this function. The config will be configured correctly on return.
4339  *
4340  * @acb: The adapter which we are to init.
4341  **/
4342 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4343 {
4344         struct NvRamType *eeprom = &acb->eeprom;
4345
4346         /* Mask all the interrupt */
4347         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4348         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4349
4350         /* Reset SCSI module */
4351         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4352
4353         /* Reset PCI/DMA module */
4354         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4355         udelay(20);
4356
4357         /* program configuration 0 */
4358         acb->config = HCC_AUTOTERM | HCC_PARITY;
4359         if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4360                 acb->config |= HCC_WIDE_CARD;
4361
4362         if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4363                 acb->config |= HCC_SCSI_RESET;
4364
4365         if (acb->config & HCC_SCSI_RESET) {
4366                 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4367                 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4368
4369                 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4370                 /*spin_unlock_irq (&io_request_lock); */
4371                 udelay(500);
4372
4373                 acb->last_reset =
4374                     jiffies + HZ / 2 +
4375                     HZ * acb->eeprom.delay_time;
4376
4377                 /*spin_lock_irq (&io_request_lock); */
4378         }
4379 }
4380
4381
4382 /**
4383  * init_adapter - Grab the resource for the card, setup the adapter
4384  * information, set the card into a known state, create the various
4385  * tables etc etc. This basically gets all adapter information all up
4386  * to date, initialised and gets the chip in sync with it.
4387  *
4388  * @host:       This hosts adapter structure
4389  * @io_port:    The base I/O port
4390  * @irq:        IRQ
4391  *
4392  * Returns 0 if the initialization succeeds, any other value on
4393  * failure.
4394  **/
4395 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4396                         u32 io_port_len, unsigned int irq)
4397 {
4398         if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4399                 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4400                 goto failed;
4401         }
4402         /* store port base to indicate we have registered it */
4403         acb->io_port_base = io_port;
4404         acb->io_port_len = io_port_len;
4405
4406         if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4407                 /* release the region we just claimed */
4408                 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4409                 goto failed;
4410         }
4411         /* store irq to indicate we have registered it */
4412         acb->irq_level = irq;
4413
4414         /* get eeprom configuration information and command line settings etc */
4415         check_eeprom(&acb->eeprom, io_port);
4416         print_eeprom_settings(&acb->eeprom);
4417
4418         /* setup adapter control block */
4419         adapter_init_params(acb);
4420
4421         /* display card connectors/termination settings */
4422         adapter_print_config(acb);
4423
4424         if (adapter_sg_tables_alloc(acb)) {
4425                 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4426                 goto failed;
4427         }
4428         adapter_init_scsi_host(acb->scsi_host);
4429         adapter_init_chip(acb);
4430         set_basic_config(acb);
4431
4432         dprintkdbg(DBG_0,
4433                 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4434                 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4435                 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4436                 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4437         return 0;
4438
4439 failed:
4440         if (acb->irq_level)
4441                 free_irq(acb->irq_level, acb);
4442         if (acb->io_port_base)
4443                 release_region(acb->io_port_base, acb->io_port_len);
4444         adapter_sg_tables_free(acb);
4445
4446         return 1;
4447 }
4448
4449
4450 /**
4451  * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4452  * stopping all operations and disabling interrupt generation on the
4453  * card.
4454  *
4455  * @acb: The adapter which we are to shutdown.
4456  **/
4457 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4458 {
4459         /* disable interrupts */
4460         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4461         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4462
4463         /* reset the scsi bus */
4464         if (acb->config & HCC_SCSI_RESET)
4465                 reset_scsi_bus(acb);
4466
4467         /* clear any pending interrupt state */
4468         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4469 }
4470
4471
4472
4473 /**
4474  * adapter_uninit - Shut down the chip and release any resources that
4475  * we had allocated. Once this returns the adapter should not be used
4476  * anymore.
4477  *
4478  * @acb: The adapter which we are to un-initialize.
4479  **/
4480 static void adapter_uninit(struct AdapterCtlBlk *acb)
4481 {
4482         unsigned long flags;
4483         DC395x_LOCK_IO(acb->scsi_host, flags);
4484
4485         /* remove timers */
4486         if (timer_pending(&acb->waiting_timer))
4487                 del_timer(&acb->waiting_timer);
4488         if (timer_pending(&acb->selto_timer))
4489                 del_timer(&acb->selto_timer);
4490
4491         adapter_uninit_chip(acb);
4492         adapter_remove_and_free_all_devices(acb);
4493         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4494
4495         if (acb->irq_level)
4496                 free_irq(acb->irq_level, acb);
4497         if (acb->io_port_base)
4498                 release_region(acb->io_port_base, acb->io_port_len);
4499
4500         adapter_sg_tables_free(acb);
4501 }
4502
4503
4504 #undef YESNO
4505 #define YESNO(YN) \
4506  if (YN) seq_printf(m, " Yes ");\
4507  else seq_printf(m, " No  ")
4508
4509 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4510 {
4511         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4512         int spd, spd1;
4513         struct DeviceCtlBlk *dcb;
4514         unsigned long flags;
4515         int dev;
4516
4517         seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4518                 " Driver Version " DC395X_VERSION "\n");
4519
4520         DC395x_LOCK_IO(acb->scsi_host, flags);
4521
4522         seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4523         seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4524                 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4525         seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4526         seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4527         seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4528
4529         seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4530         seq_printf(m, "AdapterID %i\n", host->this_id);
4531
4532         seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4533         /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4534         seq_printf(m, ", FilterCfg 0x%02x",
4535                 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4536         seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4537         /*seq_printf(m, "\n"); */
4538
4539         seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4540         seq_printf(m, "Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4541              acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4542              acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4543              acb->dcb_map[6], acb->dcb_map[7]);
4544         seq_printf(m, "                      %02x %02x %02x %02x %02x %02x %02x %02x\n",
4545              acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4546              acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4547              acb->dcb_map[14], acb->dcb_map[15]);
4548
4549         seq_puts(m,
4550                  "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4551
4552         dev = 0;
4553         list_for_each_entry(dcb, &acb->dcb_list, list) {
4554                 int nego_period;
4555                 seq_printf(m, "%02i %02i  %02i ", dev, dcb->target_id,
4556                         dcb->target_lun);
4557                 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4558                 YESNO(dcb->sync_offset);
4559                 YESNO(dcb->sync_period & WIDE_SYNC);
4560                 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4561                 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4562                 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4563                 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4564                 if (dcb->sync_offset)
4565                         seq_printf(m, "  %03i ns ", nego_period);
4566                 else
4567                         seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4568
4569                 if (dcb->sync_offset & 0x0f) {
4570                         spd = 1000 / (nego_period);
4571                         spd1 = 1000 % (nego_period);
4572                         spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4573                         seq_printf(m, "   %2i.%1i M     %02i ", spd, spd1,
4574                                 (dcb->sync_offset & 0x0f));
4575                 } else
4576                         seq_puts(m, "                 ");
4577
4578                 /* Add more info ... */
4579                 seq_printf(m, "     %02i\n", dcb->max_command);
4580                 dev++;
4581         }
4582
4583         if (timer_pending(&acb->waiting_timer))
4584                 seq_puts(m, "Waiting queue timer running\n");
4585         else
4586                 seq_putc(m, '\n');
4587
4588         list_for_each_entry(dcb, &acb->dcb_list, list) {
4589                 struct ScsiReqBlk *srb;
4590                 if (!list_empty(&dcb->srb_waiting_list))
4591                         seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4592                                 dcb->target_id, dcb->target_lun,
4593                                 list_size(&dcb->srb_waiting_list));
4594                 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4595                         seq_printf(m, " %p", srb->cmd);
4596                 if (!list_empty(&dcb->srb_going_list))
4597                         seq_printf(m, "\nDCB (%02i-%i): Going  : %i:",
4598                                 dcb->target_id, dcb->target_lun,
4599                                 list_size(&dcb->srb_going_list));
4600                 list_for_each_entry(srb, &dcb->srb_going_list, list)
4601                         seq_printf(m, " %p", srb->cmd);
4602                 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4603                         seq_putc(m, '\n');
4604         }
4605
4606         if (debug_enabled(DBG_1)) {
4607                 seq_printf(m, "DCB list for ACB %p:\n", acb);
4608                 list_for_each_entry(dcb, &acb->dcb_list, list) {
4609                         seq_printf(m, "%p -> ", dcb);
4610                 }
4611                 seq_puts(m, "END\n");
4612         }
4613
4614         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4615         return 0;
4616 }
4617
4618
4619 static struct scsi_host_template dc395x_driver_template = {
4620         .module                 = THIS_MODULE,
4621         .proc_name              = DC395X_NAME,
4622         .show_info              = dc395x_show_info,
4623         .name                   = DC395X_BANNER " " DC395X_VERSION,
4624         .queuecommand           = dc395x_queue_command,
4625         .bios_param             = dc395x_bios_param,
4626         .slave_alloc            = dc395x_slave_alloc,
4627         .slave_destroy          = dc395x_slave_destroy,
4628         .can_queue              = DC395x_MAX_CAN_QUEUE,
4629         .this_id                = 7,
4630         .sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4631         .cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4632         .eh_abort_handler       = dc395x_eh_abort,
4633         .eh_bus_reset_handler   = dc395x_eh_bus_reset,
4634         .dma_boundary           = PAGE_SIZE - 1,
4635 };
4636
4637
4638 /**
4639  * banner_display - Display banner on first instance of driver
4640  * initialized.
4641  **/
4642 static void banner_display(void)
4643 {
4644         static int banner_done = 0;
4645         if (!banner_done)
4646         {
4647                 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4648                 banner_done = 1;
4649         }
4650 }
4651
4652
4653 /**
4654  * dc395x_init_one - Initialise a single instance of the adapter.
4655  *
4656  * The PCI layer will call this once for each instance of the adapter
4657  * that it finds in the system. The pci_dev strcuture indicates which
4658  * instance we are being called from.
4659  *
4660  * @dev: The PCI device to initialize.
4661  * @id: Looks like a pointer to the entry in our pci device table
4662  * that was actually matched by the PCI subsystem.
4663  *
4664  * Returns 0 on success, or an error code (-ve) on failure.
4665  **/
4666 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4667 {
4668         struct Scsi_Host *scsi_host = NULL;
4669         struct AdapterCtlBlk *acb = NULL;
4670         unsigned long io_port_base;
4671         unsigned int io_port_len;
4672         unsigned int irq;
4673
4674         dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4675         banner_display();
4676
4677         if (pci_enable_device(dev))
4678         {
4679                 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4680                 return -ENODEV;
4681         }
4682         io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4683         io_port_len = pci_resource_len(dev, 0);
4684         irq = dev->irq;
4685         dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4686
4687         /* allocate scsi host information (includes out adapter) */
4688         scsi_host = scsi_host_alloc(&dc395x_driver_template,
4689                                     sizeof(struct AdapterCtlBlk));
4690         if (!scsi_host) {
4691                 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4692                 goto fail;
4693         }
4694         acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4695         acb->scsi_host = scsi_host;
4696         acb->dev = dev;
4697
4698         /* initialise the adapter and everything we need */
4699         if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4700                 dprintkl(KERN_INFO, "adapter init failed\n");
4701                 goto fail;
4702         }
4703
4704         pci_set_master(dev);
4705
4706         /* get the scsi mid level to scan for new devices on the bus */
4707         if (scsi_add_host(scsi_host, &dev->dev)) {
4708                 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4709                 goto fail;
4710         }
4711         pci_set_drvdata(dev, scsi_host);
4712         scsi_scan_host(scsi_host);
4713
4714         return 0;
4715
4716 fail:
4717         if (acb != NULL)
4718                 adapter_uninit(acb);
4719         if (scsi_host != NULL)
4720                 scsi_host_put(scsi_host);
4721         pci_disable_device(dev);
4722         return -ENODEV;
4723 }
4724
4725
4726 /**
4727  * dc395x_remove_one - Called to remove a single instance of the
4728  * adapter.
4729  *
4730  * @dev: The PCI device to initialize.
4731  **/
4732 static void dc395x_remove_one(struct pci_dev *dev)
4733 {
4734         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4735         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4736
4737         dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4738
4739         scsi_remove_host(scsi_host);
4740         adapter_uninit(acb);
4741         pci_disable_device(dev);
4742         scsi_host_put(scsi_host);
4743 }
4744
4745
4746 static struct pci_device_id dc395x_pci_table[] = {
4747         {
4748                 .vendor         = PCI_VENDOR_ID_TEKRAM,
4749                 .device         = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4750                 .subvendor      = PCI_ANY_ID,
4751                 .subdevice      = PCI_ANY_ID,
4752          },
4753         {}                      /* Terminating entry */
4754 };
4755 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4756
4757
4758 static struct pci_driver dc395x_driver = {
4759         .name           = DC395X_NAME,
4760         .id_table       = dc395x_pci_table,
4761         .probe          = dc395x_init_one,
4762         .remove         = dc395x_remove_one,
4763 };
4764
4765
4766 /**
4767  * dc395x_module_init - Module initialization function
4768  *
4769  * Used by both module and built-in driver to initialise this driver.
4770  **/
4771 static int __init dc395x_module_init(void)
4772 {
4773         return pci_register_driver(&dc395x_driver);
4774 }
4775
4776
4777 /**
4778  * dc395x_module_exit - Module cleanup function.
4779  **/
4780 static void __exit dc395x_module_exit(void)
4781 {
4782         pci_unregister_driver(&dc395x_driver);
4783 }
4784
4785
4786 module_init(dc395x_module_init);
4787 module_exit(dc395x_module_exit);
4788
4789 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4790 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4791 MODULE_LICENSE("GPL");