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(unsigned long ptr);
 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
 757 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
 758 {
 759         struct list_head *head = &acb->srb_free_list;
 760         struct ScsiReqBlk *srb = NULL;
 761
 762         if (!list_empty(head)) {
 763                 srb = list_entry(head->next, struct ScsiReqBlk, list);
 764                 list_del(head->next);
 765                 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
 766         }
 767         return srb;
 768 }
 769
 770
 771 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
 772 {
 773         dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
 774         list_add_tail(&srb->list, &acb->srb_free_list);
 775 }
 776
 777
 778 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
 779                 struct ScsiReqBlk *srb)
 780 {
 781         dprintkdbg(DBG_0, "srb_waiting_insert: (0x%p) <%02i-%i> srb=%p\n",
 782                 srb->cmd, dcb->target_id, dcb->target_lun, srb);
 783         list_add(&srb->list, &dcb->srb_waiting_list);
 784 }
 785
 786
 787 static void srb_waiting_append(struct DeviceCtlBlk *dcb,
 788                 struct ScsiReqBlk *srb)
 789 {
 790         dprintkdbg(DBG_0, "srb_waiting_append: (0x%p) <%02i-%i> srb=%p\n",
 791                  srb->cmd, dcb->target_id, dcb->target_lun, srb);
 792         list_add_tail(&srb->list, &dcb->srb_waiting_list);
 793 }
 794
 795
 796 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
 797 {
 798         dprintkdbg(DBG_0, "srb_going_append: (0x%p) <%02i-%i> srb=%p\n",
 799                 srb->cmd, dcb->target_id, dcb->target_lun, srb);
 800         list_add_tail(&srb->list, &dcb->srb_going_list);
 801 }
 802
 803
 804 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
 805 {
 806         struct ScsiReqBlk *i;
 807         struct ScsiReqBlk *tmp;
 808         dprintkdbg(DBG_0, "srb_going_remove: (0x%p) <%02i-%i> srb=%p\n",
 809                 srb->cmd, dcb->target_id, dcb->target_lun, srb);
 810
 811         list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
 812                 if (i == srb) {
 813                         list_del(&srb->list);
 814                         break;
 815                 }
 816 }
 817
 818
 819 static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
 820                 struct ScsiReqBlk *srb)
 821 {
 822         struct ScsiReqBlk *i;
 823         struct ScsiReqBlk *tmp;
 824         dprintkdbg(DBG_0, "srb_waiting_remove: (0x%p) <%02i-%i> srb=%p\n",
 825                 srb->cmd, dcb->target_id, dcb->target_lun, srb);
 826
 827         list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
 828                 if (i == srb) {
 829                         list_del(&srb->list);
 830                         break;
 831                 }
 832 }
 833
 834
 835 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
 836                 struct ScsiReqBlk *srb)
 837 {
 838         dprintkdbg(DBG_0,
 839                 "srb_going_to_waiting_move: (0x%p) <%02i-%i> srb=%p\n",
 840                 srb->cmd, dcb->target_id, dcb->target_lun, srb);
 841         list_move(&srb->list, &dcb->srb_waiting_list);
 842 }
 843
 844
 845 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
 846                 struct ScsiReqBlk *srb)
 847 {
 848         dprintkdbg(DBG_0,
 849                 "srb_waiting_to_going_move: (0x%p) <%02i-%i> srb=%p\n",
 850                 srb->cmd, dcb->target_id, dcb->target_lun, srb);
 851         list_move(&srb->list, &dcb->srb_going_list);
 852 }
 853
 854
 855 /* Sets the timer to wake us up */
 856 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
 857 {
 858         if (timer_pending(&acb->waiting_timer))
 859                 return;
 860         init_timer(&acb->waiting_timer);
 861         acb->waiting_timer.function = waiting_timeout;
 862         acb->waiting_timer.data = (unsigned long) acb;
 863         if (time_before(jiffies + to, acb->last_reset - HZ / 2))
 864                 acb->waiting_timer.expires =
 865                     acb->last_reset - HZ / 2 + 1;
 866         else
 867                 acb->waiting_timer.expires = jiffies + to + 1;
 868         add_timer(&acb->waiting_timer);
 869 }
 870
 871
 872 /* Send the next command from the waiting list to the bus */
 873 static void waiting_process_next(struct AdapterCtlBlk *acb)
 874 {
 875         struct DeviceCtlBlk *start = NULL;
 876         struct DeviceCtlBlk *pos;
 877         struct DeviceCtlBlk *dcb;
 878         struct ScsiReqBlk *srb;
 879         struct list_head *dcb_list_head = &acb->dcb_list;
 880
 881         if (acb->active_dcb
 882             || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
 883                 return;
 884
 885         if (timer_pending(&acb->waiting_timer))
 886                 del_timer(&acb->waiting_timer);
 887
 888         if (list_empty(dcb_list_head))
 889                 return;
 890
 891         /*
 892          * Find the starting dcb. Need to find it again in the list
 893          * since the list may have changed since we set the ptr to it
 894          */
 895         list_for_each_entry(dcb, dcb_list_head, list)
 896                 if (dcb == acb->dcb_run_robin) {
 897                         start = dcb;
 898                         break;
 899                 }
 900         if (!start) {
 901                 /* This can happen! */
 902                 start = list_entry(dcb_list_head->next, typeof(*start), list);
 903                 acb->dcb_run_robin = start;
 904         }
 905
 906
 907         /*
 908          * Loop over the dcb, but we start somewhere (potentially) in
 909          * the middle of the loop so we need to manully do this.
 910          */
 911         pos = start;
 912         do {
 913                 struct list_head *waiting_list_head = &pos->srb_waiting_list;
 914
 915                 /* Make sure, the next another device gets scheduled ... */
 916                 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
 917                                                   acb->dcb_run_robin);
 918
 919                 if (list_empty(waiting_list_head) ||
 920                     pos->max_command <= list_size(&pos->srb_going_list)) {
 921                         /* move to next dcb */
 922                         pos = dcb_get_next(dcb_list_head, pos);
 923                 } else {
 924                         srb = list_entry(waiting_list_head->next,
 925                                          struct ScsiReqBlk, list);
 926
 927                         /* Try to send to the bus */
 928                         if (!start_scsi(acb, pos, srb))
 929                                 srb_waiting_to_going_move(pos, srb);
 930                         else
 931                                 waiting_set_timer(acb, HZ/50);
 932                         break;
 933                 }
 934         } while (pos != start);
 935 }
 936
 937
 938 /* Wake up waiting queue */
 939 static void waiting_timeout(unsigned long ptr)
 940 {
 941         unsigned long flags;
 942         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
 943         dprintkdbg(DBG_1,
 944                 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
 945         DC395x_LOCK_IO(acb->scsi_host, flags);
 946         waiting_process_next(acb);
 947         DC395x_UNLOCK_IO(acb->scsi_host, flags);
 948 }
 949
 950
 951 /* Get the DCB for a given ID/LUN combination */
 952 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
 953 {
 954         return acb->children[id][lun];
 955 }
 956
 957
 958 /* Send SCSI Request Block (srb) to adapter (acb) */
 959 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
 960 {
 961         struct DeviceCtlBlk *dcb = srb->dcb;
 962
 963         if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
 964             acb->active_dcb ||
 965             (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
 966                 srb_waiting_append(dcb, srb);
 967                 waiting_process_next(acb);
 968                 return;
 969         }
 970
 971         if (!start_scsi(acb, dcb, srb))
 972                 srb_going_append(dcb, srb);
 973         else {
 974                 srb_waiting_insert(dcb, srb);
 975                 waiting_set_timer(acb, HZ / 50);
 976         }
 977 }
 978
 979 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
 980 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
 981                 struct ScsiReqBlk *srb)
 982 {
 983         int nseg;
 984         enum dma_data_direction dir = cmd->sc_data_direction;
 985         dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n",
 986                 cmd, dcb->target_id, dcb->target_lun);
 987
 988         srb->dcb = dcb;
 989         srb->cmd = cmd;
 990         srb->sg_count = 0;
 991         srb->total_xfer_length = 0;
 992         srb->sg_bus_addr = 0;
 993         srb->sg_index = 0;
 994         srb->adapter_status = 0;
 995         srb->target_status = 0;
 996         srb->msg_count = 0;
 997         srb->status = 0;
 998         srb->flag = 0;
 999         srb->state = 0;
1000         srb->retry_count = 0;
1001         srb->tag_number = TAG_NONE;
1002         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1003         srb->end_message = 0;
1004
1005         nseg = scsi_dma_map(cmd);
1006         BUG_ON(nseg < 0);
1007
1008         if (dir == PCI_DMA_NONE || !nseg) {
1009                 dprintkdbg(DBG_0,
1010                         "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1011                            cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
1012                            srb->segment_x[0].address);
1013         } else {
1014                 int i;
1015                 u32 reqlen = scsi_bufflen(cmd);
1016                 struct scatterlist *sg;
1017                 struct SGentry *sgp = srb->segment_x;
1018
1019                 srb->sg_count = nseg;
1020
1021                 dprintkdbg(DBG_0,
1022                            "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1023                            reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
1024                            srb->sg_count);
1025
1026                 scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
1027                         u32 busaddr = (u32)sg_dma_address(sg);
1028                         u32 seglen = (u32)sg->length;
1029                         sgp[i].address = busaddr;
1030                         sgp[i].length = seglen;
1031                         srb->total_xfer_length += seglen;
1032                 }
1033                 sgp += srb->sg_count - 1;
1034
1035                 /*
1036                  * adjust last page if too big as it is allocated
1037                  * on even page boundaries
1038                  */
1039                 if (srb->total_xfer_length > reqlen) {
1040                         sgp->length -= (srb->total_xfer_length - reqlen);
1041                         srb->total_xfer_length = reqlen;
1042                 }
1043
1044                 /* Fixup for WIDE padding - make sure length is even */
1045                 if (dcb->sync_period & WIDE_SYNC &&
1046                     srb->total_xfer_length % 2) {
1047                         srb->total_xfer_length++;
1048                         sgp->length++;
1049                 }
1050
1051                 srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1052                                                 srb->segment_x,
1053                                                 SEGMENTX_LEN,
1054                                                 PCI_DMA_TODEVICE);
1055
1056                 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1057                         srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1058         }
1059
1060         srb->request_length = srb->total_xfer_length;
1061 }
1062
1063
1064 /**
1065  * dc395x_queue_command - queue scsi command passed from the mid
1066  * layer, invoke 'done' on completion
1067  *
1068  * @cmd: pointer to scsi command object
1069  * @done: function pointer to be invoked on completion
1070  *
1071  * Returns 1 if the adapter (host) is busy, else returns 0. One
1072  * reason for an adapter to be busy is that the number
1073  * of outstanding queued commands is already equal to
1074  * struct Scsi_Host::can_queue .
1075  *
1076  * Required: if struct Scsi_Host::can_queue is ever non-zero
1077  *           then this function is required.
1078  *
1079  * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1080  *        and is expected to be held on return.
1081  *
1082  **/
1083 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1084 {
1085         struct DeviceCtlBlk *dcb;
1086         struct ScsiReqBlk *srb;
1087         struct AdapterCtlBlk *acb =
1088             (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1089         dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n",
1090                 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]);
1091
1092         /* Assume BAD_TARGET; will be cleared later */
1093         cmd->result = DID_BAD_TARGET << 16;
1094
1095         /* ignore invalid targets */
1096         if (cmd->device->id >= acb->scsi_host->max_id ||
1097             cmd->device->lun >= acb->scsi_host->max_lun ||
1098             cmd->device->lun >31) {
1099                 goto complete;
1100         }
1101
1102         /* does the specified lun on the specified device exist */
1103         if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1104                 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1105                         cmd->device->id, (u8)cmd->device->lun);
1106                 goto complete;
1107         }
1108
1109         /* do we have a DCB for the device */
1110         dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1111         if (!dcb) {
1112                 /* should never happen */
1113                 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1114                         cmd->device->id, (u8)cmd->device->lun);
1115                 goto complete;
1116         }
1117
1118         /* set callback and clear result in the command */
1119         cmd->scsi_done = done;
1120         cmd->result = 0;
1121
1122         srb = srb_get_free(acb);
1123         if (!srb)
1124         {
1125                 /*
1126                  * Return 1 since we are unable to queue this command at this
1127                  * point in time.
1128                  */
1129                 dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1130                 return 1;
1131         }
1132
1133         build_srb(cmd, dcb, srb);
1134
1135         if (!list_empty(&dcb->srb_waiting_list)) {
1136                 /* append to waiting queue */
1137                 srb_waiting_append(dcb, srb);
1138                 waiting_process_next(acb);
1139         } else {
1140                 /* process immediately */
1141                 send_srb(acb, srb);
1142         }
1143         dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd);
1144         return 0;
1145
1146 complete:
1147         /*
1148          * Complete the command immediatey, and then return 0 to
1149          * indicate that we have handled the command. This is usually
1150          * done when the commad is for things like non existent
1151          * devices.
1152          */
1153         done(cmd);
1154         return 0;
1155 }
1156
1157 static DEF_SCSI_QCMD(dc395x_queue_command)
1158
1159 /*
1160  * Return the disk geometry for the given SCSI device.
1161  */
1162 static int dc395x_bios_param(struct scsi_device *sdev,
1163                 struct block_device *bdev, sector_t capacity, int *info)
1164 {
1165 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1166         int heads, sectors, cylinders;
1167         struct AdapterCtlBlk *acb;
1168         int size = capacity;
1169
1170         dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1171         acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1172         heads = 64;
1173         sectors = 32;
1174         cylinders = size / (heads * sectors);
1175
1176         if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1177                 heads = 255;
1178                 sectors = 63;
1179                 cylinders = size / (heads * sectors);
1180         }
1181         geom[0] = heads;
1182         geom[1] = sectors;
1183         geom[2] = cylinders;
1184         return 0;
1185 #else
1186         return scsicam_bios_param(bdev, capacity, info);
1187 #endif
1188 }
1189
1190
1191 static void dump_register_info(struct AdapterCtlBlk *acb,
1192                 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1193 {
1194         u16 pstat;
1195         struct pci_dev *dev = acb->dev;
1196         pci_read_config_word(dev, PCI_STATUS, &pstat);
1197         if (!dcb)
1198                 dcb = acb->active_dcb;
1199         if (!srb && dcb)
1200                 srb = dcb->active_srb;
1201         if (srb) {
1202                 if (!srb->cmd)
1203                         dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1204                                 srb, srb->cmd);
1205                 else
1206                         dprintkl(KERN_INFO, "dump: srb=%p cmd=%p "
1207                                  "cmnd=0x%02x <%02i-%i>\n",
1208                                 srb, srb->cmd,
1209                                 srb->cmd->cmnd[0], srb->cmd->device->id,
1210                                 (u8)srb->cmd->device->lun);
1211                 printk("  sglist=%p cnt=%i idx=%i len=%zu\n",
1212                        srb->segment_x, srb->sg_count, srb->sg_index,
1213                        srb->total_xfer_length);
1214                 printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1215                        srb->state, srb->status, srb->scsi_phase,
1216                        (acb->active_dcb) ? "" : "not");
1217         }
1218         dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1219                 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1220                 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1221                 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1222                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1223                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1224                 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1225                 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1226                 DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1227                 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1228                 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1229                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1230                 DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1231                 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1232                 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1233                 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1234                 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1235         dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1236                 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1237                 "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1238                 DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1239                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1240                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1241                 DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1242                 DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1243                 DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1244                 DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1245                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1246                 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1247                 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1248         dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1249                 "pci{status=0x%04x}\n",
1250                 DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1251                 DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1252                 DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1253                 pstat);
1254 }
1255
1256
1257 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1258 {
1259 #if debug_enabled(DBG_FIFO)
1260         u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1261         u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1262         if (!(fifocnt & 0x40))
1263                 dprintkdbg(DBG_FIFO,
1264                         "clear_fifo: (%i bytes) on phase %02x in %s\n",
1265                         fifocnt & 0x3f, lines, txt);
1266 #endif
1267         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1268 }
1269
1270
1271 static void reset_dev_param(struct AdapterCtlBlk *acb)
1272 {
1273         struct DeviceCtlBlk *dcb;
1274         struct NvRamType *eeprom = &acb->eeprom;
1275         dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1276
1277         list_for_each_entry(dcb, &acb->dcb_list, list) {
1278                 u8 period_index;
1279
1280                 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1281                 dcb->sync_period = 0;
1282                 dcb->sync_offset = 0;
1283
1284                 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1285                 period_index = eeprom->target[dcb->target_id].period & 0x07;
1286                 dcb->min_nego_period = clock_period[period_index];
1287                 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1288                     || !(acb->config & HCC_WIDE_CARD))
1289                         dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1290         }
1291 }
1292
1293
1294 /*
1295  * perform a hard reset on the SCSI bus
1296  * @cmd - some command for this host (for fetching hooks)
1297  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1298  */
1299 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1300 {
1301         struct AdapterCtlBlk *acb =
1302                 (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1303         dprintkl(KERN_INFO,
1304                 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n",
1305                 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1306
1307         if (timer_pending(&acb->waiting_timer))
1308                 del_timer(&acb->waiting_timer);
1309
1310         /*
1311          * disable interrupt
1312          */
1313         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1314         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1315         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1316         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1317
1318         reset_scsi_bus(acb);
1319         udelay(500);
1320
1321         /* We may be in serious trouble. Wait some seconds */
1322         acb->last_reset =
1323             jiffies + 3 * HZ / 2 +
1324             HZ * acb->eeprom.delay_time;
1325
1326         /*
1327          * re-enable interrupt
1328          */
1329         /* Clear SCSI FIFO          */
1330         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1331         clear_fifo(acb, "eh_bus_reset");
1332         /* Delete pending IRQ */
1333         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1334         set_basic_config(acb);
1335
1336         reset_dev_param(acb);
1337         doing_srb_done(acb, DID_RESET, cmd, 0);
1338         acb->active_dcb = NULL;
1339         acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE ,RESET_DEV */
1340         waiting_process_next(acb);
1341
1342         return SUCCESS;
1343 }
1344
1345 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1346 {
1347         int rc;
1348
1349         spin_lock_irq(cmd->device->host->host_lock);
1350         rc = __dc395x_eh_bus_reset(cmd);
1351         spin_unlock_irq(cmd->device->host->host_lock);
1352
1353         return rc;
1354 }
1355
1356 /*
1357  * abort an errant SCSI command
1358  * @cmd - command to be aborted
1359  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1360  */
1361 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1362 {
1363         /*
1364          * Look into our command queues: If it has not been sent already,
1365          * we remove it and return success. Otherwise fail.
1366          */
1367         struct AdapterCtlBlk *acb =
1368             (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1369         struct DeviceCtlBlk *dcb;
1370         struct ScsiReqBlk *srb;
1371         dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n",
1372                 cmd, cmd->device->id, (u8)cmd->device->lun, cmd);
1373
1374         dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1375         if (!dcb) {
1376                 dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1377                 return FAILED;
1378         }
1379
1380         srb = find_cmd(cmd, &dcb->srb_waiting_list);
1381         if (srb) {
1382                 srb_waiting_remove(dcb, srb);
1383                 pci_unmap_srb_sense(acb, srb);
1384                 pci_unmap_srb(acb, srb);
1385                 free_tag(dcb, srb);
1386                 srb_free_insert(acb, srb);
1387                 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1388                 cmd->result = DID_ABORT << 16;
1389                 return SUCCESS;
1390         }
1391         srb = find_cmd(cmd, &dcb->srb_going_list);
1392         if (srb) {
1393                 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1394                 /* XXX: Should abort the command here */
1395         } else {
1396                 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1397         }
1398         return FAILED;
1399 }
1400
1401
1402 /* SDTR */
1403 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1404                 struct ScsiReqBlk *srb)
1405 {
1406         u8 *ptr = srb->msgout_buf + srb->msg_count;
1407         if (srb->msg_count > 1) {
1408                 dprintkl(KERN_INFO,
1409                         "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1410                         srb->msg_count, srb->msgout_buf[0],
1411                         srb->msgout_buf[1]);
1412                 return;
1413         }
1414         if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1415                 dcb->sync_offset = 0;
1416                 dcb->min_nego_period = 200 >> 2;
1417         } else if (dcb->sync_offset == 0)
1418                 dcb->sync_offset = SYNC_NEGO_OFFSET;
1419
1420         *ptr++ = MSG_EXTENDED;  /* (01h) */
1421         *ptr++ = 3;             /* length */
1422         *ptr++ = EXTENDED_SDTR; /* (01h) */
1423         *ptr++ = dcb->min_nego_period;  /* Transfer period (in 4ns) */
1424         *ptr++ = dcb->sync_offset;      /* Transfer period (max. REQ/ACK dist) */
1425         srb->msg_count += 5;
1426         srb->state |= SRB_DO_SYNC_NEGO;
1427 }
1428
1429
1430 /* WDTR */
1431 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1432                 struct ScsiReqBlk *srb)
1433 {
1434         u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1435                    (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1436         u8 *ptr = srb->msgout_buf + srb->msg_count;
1437         if (srb->msg_count > 1) {
1438                 dprintkl(KERN_INFO,
1439                         "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1440                         srb->msg_count, srb->msgout_buf[0],
1441                         srb->msgout_buf[1]);
1442                 return;
1443         }
1444         *ptr++ = MSG_EXTENDED;  /* (01h) */
1445         *ptr++ = 2;             /* length */
1446         *ptr++ = EXTENDED_WDTR; /* (03h) */
1447         *ptr++ = wide;
1448         srb->msg_count += 4;
1449         srb->state |= SRB_DO_WIDE_NEGO;
1450 }
1451
1452
1453 #if 0
1454 /* Timer to work around chip flaw: When selecting and the bus is
1455  * busy, we sometimes miss a Selection timeout IRQ */
1456 void selection_timeout_missed(unsigned long ptr);
1457 /* Sets the timer to wake us up */
1458 static void selto_timer(struct AdapterCtlBlk *acb)
1459 {
1460         if (timer_pending(&acb->selto_timer))
1461                 return;
1462         acb->selto_timer.function = selection_timeout_missed;
1463         acb->selto_timer.data = (unsigned long) acb;
1464         if (time_before
1465             (jiffies + HZ, acb->last_reset + HZ / 2))
1466                 acb->selto_timer.expires =
1467                     acb->last_reset + HZ / 2 + 1;
1468         else
1469                 acb->selto_timer.expires = jiffies + HZ + 1;
1470         add_timer(&acb->selto_timer);
1471 }
1472
1473
1474 void selection_timeout_missed(unsigned long ptr)
1475 {
1476         unsigned long flags;
1477         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1478         struct ScsiReqBlk *srb;
1479         dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1480         if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1481                 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1482                 return;
1483         }
1484         DC395x_LOCK_IO(acb->scsi_host, flags);
1485         srb = acb->active_dcb->active_srb;
1486         disconnect(acb);
1487         DC395x_UNLOCK_IO(acb->scsi_host, flags);
1488 }
1489 #endif
1490
1491
1492 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1493                 struct ScsiReqBlk* srb)
1494 {
1495         u16 s_stat2, return_code;
1496         u8 s_stat, scsicommand, i, identify_message;
1497         u8 *ptr;
1498         dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n",
1499                 dcb->target_id, dcb->target_lun, srb);
1500
1501         srb->tag_number = TAG_NONE;     /* acb->tag_max_num: had error read in eeprom */
1502
1503         s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1504         s_stat2 = 0;
1505         s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1506 #if 1
1507         if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1508                 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n",
1509                         s_stat, s_stat2);
1510                 /*
1511                  * Try anyway?
1512                  *
1513                  * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1514                  * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed!
1515                  * (This is likely to be a bug in the hardware. Obviously, most people
1516                  *  only have one initiator per SCSI bus.)
1517                  * Instead let this fail and have the timer make sure the command is
1518                  * tried again after a short time
1519                  */
1520                 /*selto_timer (acb); */
1521                 return 1;
1522         }
1523 #endif
1524         if (acb->active_dcb) {
1525                 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a"
1526                         "command while another command (0x%p) is active.",
1527                         srb->cmd,
1528                         acb->active_dcb->active_srb ?
1529                             acb->active_dcb->active_srb->cmd : 0);
1530                 return 1;
1531         }
1532         if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1533                 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd);
1534                 return 1;
1535         }
1536         /* Allow starting of SCSI commands half a second before we allow the mid-level
1537          * to queue them again after a reset */
1538         if (time_before(jiffies, acb->last_reset - HZ / 2)) {
1539                 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1540                 return 1;
1541         }
1542
1543         /* Flush FIFO */
1544         clear_fifo(acb, "start_scsi");
1545         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1546         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1547         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1548         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1549         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1550
1551         identify_message = dcb->identify_msg;
1552         /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1553         /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1554         if (srb->flag & AUTO_REQSENSE)
1555                 identify_message &= 0xBF;
1556
1557         if (((srb->cmd->cmnd[0] == INQUIRY)
1558              || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1559              || (srb->flag & AUTO_REQSENSE))
1560             && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1561                  && !(dcb->sync_mode & WIDE_NEGO_DONE))
1562                 || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1563                     && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1564             && (dcb->target_lun == 0)) {
1565                 srb->msgout_buf[0] = identify_message;
1566                 srb->msg_count = 1;
1567                 scsicommand = SCMD_SEL_ATNSTOP;
1568                 srb->state = SRB_MSGOUT;
1569 #ifndef SYNC_FIRST
1570                 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1571                     && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1572                         build_wdtr(acb, dcb, srb);
1573                         goto no_cmd;
1574                 }
1575 #endif
1576                 if (dcb->sync_mode & SYNC_NEGO_ENABLE
1577                     && dcb->inquiry7 & SCSI_INQ_SYNC) {
1578                         build_sdtr(acb, dcb, srb);
1579                         goto no_cmd;
1580                 }
1581                 if (dcb->sync_mode & WIDE_NEGO_ENABLE
1582                     && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1583                         build_wdtr(acb, dcb, srb);
1584                         goto no_cmd;
1585                 }
1586                 srb->msg_count = 0;
1587         }
1588         /* Send identify message */
1589         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1590
1591         scsicommand = SCMD_SEL_ATN;
1592         srb->state = SRB_START_;
1593 #ifndef DC395x_NO_TAGQ
1594         if ((dcb->sync_mode & EN_TAG_QUEUEING)
1595             && (identify_message & 0xC0)) {
1596                 /* Send Tag message */
1597                 u32 tag_mask = 1;
1598                 u8 tag_number = 0;
1599                 while (tag_mask & dcb->tag_mask
1600                        && tag_number < dcb->max_command) {
1601                         tag_mask = tag_mask << 1;
1602                         tag_number++;
1603                 }
1604                 if (tag_number >= dcb->max_command) {
1605                         dprintkl(KERN_WARNING, "start_scsi: (0x%p) "
1606                                 "Out of tags target=<%02i-%i>)\n",
1607                                 srb->cmd, srb->cmd->device->id,
1608                                 (u8)srb->cmd->device->lun);
1609                         srb->state = SRB_READY;
1610                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1611                                        DO_HWRESELECT);
1612                         return 1;
1613                 }
1614                 /* Send Tag id */
1615                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1616                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1617                 dcb->tag_mask |= tag_mask;
1618                 srb->tag_number = tag_number;
1619                 scsicommand = SCMD_SEL_ATN3;
1620                 srb->state = SRB_START_;
1621         }
1622 #endif
1623 /*polling:*/
1624         /* Send CDB ..command block ......... */
1625         dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n",
1626                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
1627                 srb->cmd->cmnd[0], srb->tag_number);
1628         if (srb->flag & AUTO_REQSENSE) {
1629                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1630                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1631                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1632                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1633                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1634                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1635         } else {
1636                 ptr = (u8 *)srb->cmd->cmnd;
1637                 for (i = 0; i < srb->cmd->cmd_len; i++)
1638                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1639         }
1640       no_cmd:
1641         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1642                        DO_HWRESELECT | DO_DATALATCH);
1643         if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1644                 /*
1645                  * If start_scsi return 1:
1646                  * we caught an interrupt (must be reset or reselection ... )
1647                  * : Let's process it first!
1648                  */
1649                 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n",
1650                         srb->cmd, dcb->target_id, dcb->target_lun);
1651                 srb->state = SRB_READY;
1652                 free_tag(dcb, srb);
1653                 srb->msg_count = 0;
1654                 return_code = 1;
1655                 /* This IRQ should NOT get lost, as we did not acknowledge it */
1656         } else {
1657                 /*
1658                  * If start_scsi returns 0:
1659                  * we know that the SCSI processor is free
1660                  */
1661                 srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
1662                 dcb->active_srb = srb;
1663                 acb->active_dcb = dcb;
1664                 return_code = 0;
1665                 /* it's important for atn stop */
1666                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1667                                DO_DATALATCH | DO_HWRESELECT);
1668                 /* SCSI command */
1669                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1670         }
1671         return return_code;
1672 }
1673
1674
1675 #define DC395x_ENABLE_MSGOUT \
1676  DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1677  srb->state |= SRB_MSGOUT
1678
1679
1680 /* abort command */
1681 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1682                 struct ScsiReqBlk *srb)
1683 {
1684         srb->msgout_buf[0] = ABORT;
1685         srb->msg_count = 1;
1686         DC395x_ENABLE_MSGOUT;
1687         srb->state &= ~SRB_MSGIN;
1688         srb->state |= SRB_MSGOUT;
1689 }
1690
1691
1692 /**
1693  * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1694  *                           have been triggered for this card.
1695  *
1696  * @acb:         a pointer to the adpter control block
1697  * @scsi_status: the status return when we checked the card
1698  **/
1699 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1700                 u16 scsi_status)
1701 {
1702         struct DeviceCtlBlk *dcb;
1703         struct ScsiReqBlk *srb;
1704         u16 phase;
1705         u8 scsi_intstatus;
1706         unsigned long flags;
1707         void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1708                               u16 *);
1709
1710         DC395x_LOCK_IO(acb->scsi_host, flags);
1711
1712         /* This acknowledges the IRQ */
1713         scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1714         if ((scsi_status & 0x2007) == 0x2002)
1715                 dprintkl(KERN_DEBUG,
1716                         "COP after COP completed? %04x\n", scsi_status);
1717         if (debug_enabled(DBG_KG)) {
1718                 if (scsi_intstatus & INT_SELTIMEOUT)
1719                         dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1720         }
1721         /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1722
1723         if (timer_pending(&acb->selto_timer))
1724                 del_timer(&acb->selto_timer);
1725
1726         if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1727                 disconnect(acb);        /* bus free interrupt  */
1728                 goto out_unlock;
1729         }
1730         if (scsi_intstatus & INT_RESELECTED) {
1731                 reselect(acb);
1732                 goto out_unlock;
1733         }
1734         if (scsi_intstatus & INT_SELECT) {
1735                 dprintkl(KERN_INFO, "Host does not support target mode!\n");
1736                 goto out_unlock;
1737         }
1738         if (scsi_intstatus & INT_SCSIRESET) {
1739                 scsi_reset_detect(acb);
1740                 goto out_unlock;
1741         }
1742         if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1743                 dcb = acb->active_dcb;
1744                 if (!dcb) {
1745                         dprintkl(KERN_DEBUG,
1746                                 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1747                                 scsi_status, scsi_intstatus);
1748                         goto out_unlock;
1749                 }
1750                 srb = dcb->active_srb;
1751                 if (dcb->flag & ABORT_DEV_) {
1752                         dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1753                         enable_msgout_abort(acb, srb);
1754                 }
1755
1756                 /* software sequential machine */
1757                 phase = (u16)srb->scsi_phase;
1758
1759                 /*
1760                  * 62037 or 62137
1761                  * call  dc395x_scsi_phase0[]... "phase entry"
1762                  * handle every phase before start transfer
1763                  */
1764                 /* data_out_phase0,     phase:0 */
1765                 /* data_in_phase0,      phase:1 */
1766                 /* command_phase0,      phase:2 */
1767                 /* status_phase0,       phase:3 */
1768                 /* nop0,                phase:4 PH_BUS_FREE .. initial phase */
1769                 /* nop0,                phase:5 PH_BUS_FREE .. initial phase */
1770                 /* msgout_phase0,       phase:6 */
1771                 /* msgin_phase0,        phase:7 */
1772                 dc395x_statev = dc395x_scsi_phase0[phase];
1773                 dc395x_statev(acb, srb, &scsi_status);
1774
1775                 /*
1776                  * if there were any exception occurred scsi_status
1777                  * will be modify to bus free phase new scsi_status
1778                  * transfer out from ... previous dc395x_statev
1779                  */
1780                 srb->scsi_phase = scsi_status & PHASEMASK;
1781                 phase = (u16)scsi_status & PHASEMASK;
1782
1783                 /*
1784                  * call  dc395x_scsi_phase1[]... "phase entry" handle
1785                  * every phase to do transfer
1786                  */
1787                 /* data_out_phase1,     phase:0 */
1788                 /* data_in_phase1,      phase:1 */
1789                 /* command_phase1,      phase:2 */
1790                 /* status_phase1,       phase:3 */
1791                 /* nop1,                phase:4 PH_BUS_FREE .. initial phase */
1792                 /* nop1,                phase:5 PH_BUS_FREE .. initial phase */
1793                 /* msgout_phase1,       phase:6 */
1794                 /* msgin_phase1,        phase:7 */
1795                 dc395x_statev = dc395x_scsi_phase1[phase];
1796                 dc395x_statev(acb, srb, &scsi_status);
1797         }
1798       out_unlock:
1799         DC395x_UNLOCK_IO(acb->scsi_host, flags);
1800 }
1801
1802
1803 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1804 {
1805         struct AdapterCtlBlk *acb = dev_id;
1806         u16 scsi_status;
1807         u8 dma_status;
1808         irqreturn_t handled = IRQ_NONE;
1809
1810         /*
1811          * Check for pending interrupt
1812          */
1813         scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1814         dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1815         if (scsi_status & SCSIINTERRUPT) {
1816                 /* interrupt pending - let's process it! */
1817                 dc395x_handle_interrupt(acb, scsi_status);
1818                 handled = IRQ_HANDLED;
1819         }
1820         else if (dma_status & 0x20) {
1821                 /* Error from the DMA engine */
1822                 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1823 #if 0
1824                 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1825                 if (acb->active_dcb) {
1826                         acb->active_dcb-> flag |= ABORT_DEV_;
1827                         if (acb->active_dcb->active_srb)
1828                                 enable_msgout_abort(acb, acb->active_dcb->active_srb);
1829                 }
1830                 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1831 #else
1832                 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1833                 acb = NULL;
1834 #endif
1835                 handled = IRQ_HANDLED;
1836         }
1837
1838         return handled;
1839 }
1840
1841
1842 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1843                 u16 *pscsi_status)
1844 {
1845         dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd);
1846         if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1847                 *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
1848
1849         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
1850         srb->state &= ~SRB_MSGOUT;
1851 }
1852
1853
1854 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1855                 u16 *pscsi_status)
1856 {
1857         u16 i;
1858         u8 *ptr;
1859         dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd);
1860
1861         clear_fifo(acb, "msgout_phase1");
1862         if (!(srb->state & SRB_MSGOUT)) {
1863                 srb->state |= SRB_MSGOUT;
1864                 dprintkl(KERN_DEBUG,
1865                         "msgout_phase1: (0x%p) Phase unexpected\n",
1866                         srb->cmd);      /* So what ? */
1867         }
1868         if (!srb->msg_count) {
1869                 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n",
1870                         srb->cmd);
1871                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1872                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
1873                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1874                 return;
1875         }
1876         ptr = (u8 *)srb->msgout_buf;
1877         for (i = 0; i < srb->msg_count; i++)
1878                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1879         srb->msg_count = 0;
1880         if (srb->msgout_buf[0] == MSG_ABORT)
1881                 srb->state = SRB_ABORT_SENT;
1882
1883         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1884 }
1885
1886
1887 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1888                 u16 *pscsi_status)
1889 {
1890         dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd);
1891         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1892 }
1893
1894
1895 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1896                 u16 *pscsi_status)
1897 {
1898         struct DeviceCtlBlk *dcb;
1899         u8 *ptr;
1900         u16 i;
1901         dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd);
1902
1903         clear_fifo(acb, "command_phase1");
1904         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1905         if (!(srb->flag & AUTO_REQSENSE)) {
1906                 ptr = (u8 *)srb->cmd->cmnd;
1907                 for (i = 0; i < srb->cmd->cmd_len; i++) {
1908                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1909                         ptr++;
1910                 }
1911         } else {
1912                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1913                 dcb = acb->active_dcb;
1914                 /* target id */
1915                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1916                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1917                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1918                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1919                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1920         }
1921         srb->state |= SRB_COMMAND;
1922         /* it's important for atn stop */
1923         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1924         /* SCSI command */
1925         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1926 }
1927
1928
1929 /*
1930  * Verify that the remaining space in the hw sg lists is the same as
1931  * the count of remaining bytes in srb->total_xfer_length
1932  */
1933 static void sg_verify_length(struct ScsiReqBlk *srb)
1934 {
1935         if (debug_enabled(DBG_SG)) {
1936                 unsigned len = 0;
1937                 unsigned idx = srb->sg_index;
1938                 struct SGentry *psge = srb->segment_x + idx;
1939                 for (; idx < srb->sg_count; psge++, idx++)
1940                         len += psge->length;
1941                 if (len != srb->total_xfer_length)
1942                         dprintkdbg(DBG_SG,
1943                                "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1944                                srb->total_xfer_length, len);
1945         }
1946 }
1947
1948
1949 /*
1950  * Compute the next Scatter Gather list index and adjust its length
1951  * and address if necessary
1952  */
1953 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1954 {
1955         u8 idx;
1956         u32 xferred = srb->total_xfer_length - left; /* bytes transferred */
1957         struct SGentry *psge = srb->segment_x + srb->sg_index;
1958
1959         dprintkdbg(DBG_0,
1960                 "sg_update_list: Transferred %i of %i bytes, %i remain\n",
1961                 xferred, srb->total_xfer_length, left);
1962         if (xferred == 0) {
1963                 /* nothing to update since we did not transfer any data */
1964                 return;
1965         }
1966
1967         sg_verify_length(srb);
1968         srb->total_xfer_length = left;  /* update remaining count */
1969         for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1970                 if (xferred >= psge->length) {
1971                         /* Complete SG entries done */
1972                         xferred -= psge->length;
1973                 } else {
1974                         /* Partial SG entry done */
1975                         pci_dma_sync_single_for_cpu(srb->dcb->
1976                                             acb->dev,
1977                                             srb->sg_bus_addr,
1978                                             SEGMENTX_LEN,
1979                                             PCI_DMA_TODEVICE);
1980                         psge->length -= xferred;
1981                         psge->address += xferred;
1982                         srb->sg_index = idx;
1983                         pci_dma_sync_single_for_device(srb->dcb->
1984                                             acb->dev,
1985                                             srb->sg_bus_addr,
1986                                             SEGMENTX_LEN,
1987                                             PCI_DMA_TODEVICE);
1988                         break;
1989                 }
1990                 psge++;
1991         }
1992         sg_verify_length(srb);
1993 }
1994
1995
1996 /*
1997  * We have transferred a single byte (PIO mode?) and need to update
1998  * the count of bytes remaining (total_xfer_length) and update the sg
1999  * entry to either point to next byte in the current sg entry, or of
2000  * already at the end to point to the start of the next sg entry
2001  */
2002 static void sg_subtract_one(struct ScsiReqBlk *srb)
2003 {
2004         sg_update_list(srb, srb->total_xfer_length - 1);
2005 }
2006
2007
2008 /*
2009  * cleanup_after_transfer
2010  *
2011  * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2012  * KG: Currently called from  StatusPhase1 ()
2013  * Should probably also be called from other places
2014  * Best might be to call it in DataXXPhase0, if new phase will differ
2015  */
2016 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2017                 struct ScsiReqBlk *srb)
2018 {
2019         /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2020         if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {       /* read */
2021                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2022                         clear_fifo(acb, "cleanup/in");
2023                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2024                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2025         } else {                /* write */
2026                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2027                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2028                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2029                         clear_fifo(acb, "cleanup/out");
2030         }
2031         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2032 }
2033
2034
2035 /*
2036  * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
2037  * Seems to be needed for unknown reasons; could be a hardware bug :-(
2038  */
2039 #define DC395x_LASTPIO 4
2040
2041
2042 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2043                 u16 *pscsi_status)
2044 {
2045         struct DeviceCtlBlk *dcb = srb->dcb;
2046         u16 scsi_status = *pscsi_status;
2047         u32 d_left_counter = 0;
2048         dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
2049                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2050
2051         /*
2052          * KG: We need to drain the buffers before we draw any conclusions!
2053          * This means telling the DMA to push the rest into SCSI, telling
2054          * SCSI to push the rest to the bus.
2055          * However, the device might have been the one to stop us (phase
2056          * change), and the data in transit just needs to be accounted so
2057          * it can be retransmitted.)
2058          */
2059         /*
2060          * KG: Stop DMA engine pushing more data into the SCSI FIFO
2061          * If we need more data, the DMA SG list will be freshly set up, anyway
2062          */
2063         dprintkdbg(DBG_PIO, "data_out_phase0: "
2064                 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2065                 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2066                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2067                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2068                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2069                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2070                 srb->total_xfer_length);
2071         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2072
2073         if (!(srb->state & SRB_XFERPAD)) {
2074                 if (scsi_status & PARITYERROR)
2075                         srb->status |= PARITY_ERROR;
2076
2077                 /*
2078                  * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2079                  * is the no of bytes it got from the DMA engine not the no it
2080                  * transferred successfully to the device. (And the difference could
2081                  * be as much as the FIFO size, I guess ...)
2082                  */
2083                 if (!(scsi_status & SCSIXFERDONE)) {
2084                         /*
2085                          * when data transfer from DMA FIFO to SCSI FIFO
2086                          * if there was some data left in SCSI FIFO
2087                          */
2088                         d_left_counter =
2089                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2090                                   0x1F);
2091                         if (dcb->sync_period & WIDE_SYNC)
2092                                 d_left_counter <<= 1;
2093
2094                         dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2095                                 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2096                                 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2097                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2098                                 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2099                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2100                                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2101                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2102                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2103                                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2104                 }
2105                 /*
2106                  * calculate all the residue data that not yet tranfered
2107                  * SCSI transfer counter + left in SCSI FIFO data
2108                  *
2109                  * .....TRM_S1040_SCSI_COUNTER (24bits)
2110                  * The counter always decrement by one for every SCSI byte transfer.
2111                  * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2112                  * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2113                  */
2114                 if (srb->total_xfer_length > DC395x_LASTPIO)
2115                         d_left_counter +=
2116                             DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2117
2118                 /* Is this a good idea? */
2119                 /*clear_fifo(acb, "DOP1"); */
2120                 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2121                 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2122                     && scsi_bufflen(srb->cmd) % 2) {
2123                         d_left_counter = 0;
2124                         dprintkl(KERN_INFO,
2125                                 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2126                                 scsi_status);
2127                 }
2128                 /*
2129                  * KG: Oops again. Same thinko as above: The SCSI might have been
2130                  * faster than the DMA engine, so that it ran out of data.
2131                  * In that case, we have to do just nothing!
2132                  * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2133                  */
2134                 /*
2135                  * KG: This is nonsense: We have been WRITING data to the bus
2136                  * If the SCSI engine has no bytes left, how should the DMA engine?
2137                  */
2138                 if (d_left_counter == 0) {
2139                         srb->total_xfer_length = 0;
2140                 } else {
2141                         /*
2142                          * if transfer not yet complete
2143                          * there were some data residue in SCSI FIFO or
2144                          * SCSI transfer counter not empty
2145                          */
2146                         long oldxferred =
2147                             srb->total_xfer_length - d_left_counter;
2148                         const int diff =
2149                             (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2150                         sg_update_list(srb, d_left_counter);
2151                         /* KG: Most ugly hack! Apparently, this works around a chip bug */
2152                         if ((srb->segment_x[srb->sg_index].length ==
2153                              diff && scsi_sg_count(srb->cmd))
2154                             || ((oldxferred & ~PAGE_MASK) ==
2155                                 (PAGE_SIZE - diff))
2156                             ) {
2157                                 dprintkl(KERN_INFO, "data_out_phase0: "
2158                                         "Work around chip bug (%i)?\n", diff);
2159                                 d_left_counter =
2160                                     srb->total_xfer_length - diff;
2161                                 sg_update_list(srb, d_left_counter);
2162                                 /*srb->total_xfer_length -= diff; */
2163                                 /*srb->virt_addr += diff; */
2164                                 /*if (srb->cmd->use_sg) */
2165                                 /*      srb->sg_index++; */
2166                         }
2167                 }
2168         }
2169         if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2170                 cleanup_after_transfer(acb, srb);
2171         }
2172 }
2173
2174
2175 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2176                 u16 *pscsi_status)
2177 {
2178         dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2179                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2180         clear_fifo(acb, "data_out_phase1");
2181         /* do prepare before transfer when data out phase */
2182         data_io_transfer(acb, srb, XFERDATAOUT);
2183 }
2184
2185 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2186                 u16 *pscsi_status)
2187 {
2188         u16 scsi_status = *pscsi_status;
2189
2190         dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2191                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2192
2193         /*
2194          * KG: DataIn is much more tricky than DataOut. When the device is finished
2195          * and switches to another phase, the SCSI engine should be finished too.
2196          * But: There might still be bytes left in its FIFO to be fetched by the DMA
2197          * engine and transferred to memory.
2198          * We should wait for the FIFOs to be emptied by that (is there any way to
2199          * enforce this?) and then stop the DMA engine, because it might think, that
2200          * there are more bytes to follow. Yes, the device might disconnect prior to
2201          * having all bytes transferred!
2202          * Also we should make sure that all data from the DMA engine buffer's really
2203          * made its way to the system memory! Some documentation on this would not
2204          * seem to be a bad idea, actually.
2205          */
2206         if (!(srb->state & SRB_XFERPAD)) {
2207                 u32 d_left_counter;
2208                 unsigned int sc, fc;
2209
2210                 if (scsi_status & PARITYERROR) {
2211                         dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2212                                 "Parity Error\n", srb->cmd);
2213                         srb->status |= PARITY_ERROR;
2214                 }
2215                 /*
2216                  * KG: We should wait for the DMA FIFO to be empty ...
2217                  * but: it would be better to wait first for the SCSI FIFO and then the
2218                  * the DMA FIFO to become empty? How do we know, that the device not already
2219                  * sent data to the FIFO in a MsgIn phase, eg.?
2220                  */
2221                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2222 #if 0
2223                         int ctr = 6000000;
2224                         dprintkl(KERN_DEBUG,
2225                                 "DIP0: Wait for DMA FIFO to flush ...\n");
2226                         /*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2227                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2228                         /*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2229                         while (!
2230                                (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2231                                 0x80) && --ctr);
2232                         if (ctr < 6000000 - 1)
2233                                 dprintkl(KERN_DEBUG
2234                                        "DIP0: Had to wait for DMA ...\n");
2235                         if (!ctr)
2236                                 dprintkl(KERN_ERR,
2237                                        "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2238                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2239 #endif
2240                         dprintkdbg(DBG_KG, "data_in_phase0: "
2241                                 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2242                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2243                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2244                 }
2245                 /* Now: Check remainig data: The SCSI counters should tell us ... */
2246                 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2247                 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2248                 d_left_counter = sc + ((fc & 0x1f)
2249                        << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2250                            0));
2251                 dprintkdbg(DBG_KG, "data_in_phase0: "
2252                         "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2253                         "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2254                         "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2255                         fc,
2256                         (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2257                         sc,
2258                         fc,
2259                         DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2260                         DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2261                         srb->total_xfer_length, d_left_counter);
2262 #if DC395x_LASTPIO
2263                 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2264                 if (d_left_counter
2265                     && srb->total_xfer_length <= DC395x_LASTPIO) {
2266                         size_t left_io = srb->total_xfer_length;
2267
2268                         /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2269                         /*sg_update_list (srb, d_left_counter); */
2270                         dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2271                                    "for remaining %i bytes:",
2272                                 fc & 0x1f,
2273                                 (srb->dcb->sync_period & WIDE_SYNC) ?
2274                                     "words" : "bytes",
2275                                 srb->total_xfer_length);
2276                         if (srb->dcb->sync_period & WIDE_SYNC)
2277                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2278                                               CFG2_WIDEFIFO);
2279                         while (left_io) {
2280                                 unsigned char *virt, *base = NULL;
2281                                 unsigned long flags = 0;
2282                                 size_t len = left_io;
2283                                 size_t offset = srb->request_length - left_io;
2284
2285                                 local_irq_save(flags);
2286                                 /* Assumption: it's inside one page as it's at most 4 bytes and
2287                                    I just assume it's on a 4-byte boundary */
2288                                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2289                                                            srb->sg_count, &offset, &len);
2290                                 virt = base + offset;
2291
2292                                 left_io -= len;
2293
2294                                 while (len) {
2295                                         u8 byte;
2296                                         byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2297                                         *virt++ = byte;
2298
2299                                         if (debug_enabled(DBG_PIO))
2300                                                 printk(" %02x", byte);
2301
2302                                         d_left_counter--;
2303                                         sg_subtract_one(srb);
2304
2305                                         len--;
2306
2307                                         fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2308
2309                                         if (fc == 0x40) {
2310                                                 left_io = 0;
2311                                                 break;
2312                                         }
2313                                 }
2314
2315                                 WARN_ON((fc != 0x40) == !d_left_counter);
2316
2317                                 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2318                                         /* Read the last byte ... */
2319                                         if (srb->total_xfer_length > 0) {
2320                                                 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2321
2322                                                 *virt++ = byte;
2323                                                 srb->total_xfer_length--;
2324                                                 if (debug_enabled(DBG_PIO))
2325                                                         printk(" %02x", byte);
2326                                         }
2327
2328                                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2329                                 }
2330
2331                                 scsi_kunmap_atomic_sg(base);
2332                                 local_irq_restore(flags);
2333                         }
2334                         /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2335                         /*srb->total_xfer_length = 0; */
2336                         if (debug_enabled(DBG_PIO))
2337                                 printk("\n");
2338                 }
2339 #endif                          /* DC395x_LASTPIO */
2340
2341 #if 0
2342                 /*
2343                  * KG: This was in DATAOUT. Does it also belong here?
2344                  * Nobody seems to know what counter and fifo_cnt count exactly ...
2345                  */
2346                 if (!(scsi_status & SCSIXFERDONE)) {
2347                         /*
2348                          * when data transfer from DMA FIFO to SCSI FIFO
2349                          * if there was some data left in SCSI FIFO
2350                          */
2351                         d_left_counter =
2352                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2353                                   0x1F);
2354                         if (srb->dcb->sync_period & WIDE_SYNC)
2355                                 d_left_counter <<= 1;
2356                         /*
2357                          * if WIDE scsi SCSI FIFOCNT unit is word !!!
2358                          * so need to *= 2
2359                          * KG: Seems to be correct ...
2360                          */
2361                 }
2362 #endif
2363                 /* KG: This should not be needed any more! */
2364                 if (d_left_counter == 0
2365                     || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2366 #if 0
2367                         int ctr = 6000000;
2368                         u8 TempDMAstatus;
2369                         do {
2370                                 TempDMAstatus =
2371                                     DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2372                         } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2373                         if (!ctr)
2374                                 dprintkl(KERN_ERR,
2375                                        "Deadlock in DataInPhase0 waiting for DMA!!\n");
2376                         srb->total_xfer_length = 0;
2377 #endif
2378                         srb->total_xfer_length = d_left_counter;
2379                 } else {        /* phase changed */
2380                         /*
2381                          * parsing the case:
2382                          * when a transfer not yet complete
2383                          * but be disconnected by target
2384                          * if transfer not yet complete
2385                          * there were some data residue in SCSI FIFO or
2386                          * SCSI transfer counter not empty
2387                          */
2388                         sg_update_list(srb, d_left_counter);
2389                 }
2390         }
2391         /* KG: The target may decide to disconnect: Empty FIFO before! */
2392         if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2393                 cleanup_after_transfer(acb, srb);
2394         }
2395 }
2396
2397
2398 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2399                 u16 *pscsi_status)
2400 {
2401         dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2402                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2403         data_io_transfer(acb, srb, XFERDATAIN);
2404 }
2405
2406
2407 static void data_io_transfer(struct AdapterCtlBlk *acb,
2408                 struct ScsiReqBlk *srb, u16 io_dir)
2409 {
2410         struct DeviceCtlBlk *dcb = srb->dcb;
2411         u8 bval;
2412         dprintkdbg(DBG_0,
2413                 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2414                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun,
2415                 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2416                 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2417         if (srb == acb->tmp_srb)
2418                 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2419         if (srb->sg_index >= srb->sg_count) {
2420                 /* can't happen? out of bounds error */
2421                 return;
2422         }
2423
2424         if (srb->total_xfer_length > DC395x_LASTPIO) {
2425                 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2426                 /*
2427                  * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2428                  * Maybe, even ABORTXFER would be appropriate
2429                  */
2430                 if (dma_status & XFERPENDING) {
2431                         dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2432                                 "Expect trouble!\n");
2433                         dump_register_info(acb, dcb, srb);
2434                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2435                 }
2436                 /* clear_fifo(acb, "IO"); */
2437                 /*
2438                  * load what physical address of Scatter/Gather list table
2439                  * want to be transfer
2440                  */
2441                 srb->state |= SRB_DATA_XFER;
2442                 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2443                 if (scsi_sg_count(srb->cmd)) {  /* with S/G */
2444                         io_dir |= DMACMD_SG;
2445                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2446                                        srb->sg_bus_addr +
2447                                        sizeof(struct SGentry) *
2448                                        srb->sg_index);
2449                         /* load how many bytes in the sg list table */
2450                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2451                                        ((u32)(srb->sg_count -
2452                                               srb->sg_index) << 3));
2453                 } else {        /* without S/G */
2454                         io_dir &= ~DMACMD_SG;
2455                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2456                                        srb->segment_x[0].address);
2457                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2458                                        srb->segment_x[0].length);
2459                 }
2460                 /* load total transfer length (24bits) max value 16Mbyte */
2461                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2462                                srb->total_xfer_length);
2463                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2464                 if (io_dir & DMACMD_DIR) {      /* read */
2465                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2466                                       SCMD_DMA_IN);
2467                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2468                 } else {
2469                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2470                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2471                                       SCMD_DMA_OUT);
2472                 }
2473
2474         }
2475 #if DC395x_LASTPIO
2476         else if (srb->total_xfer_length > 0) {  /* The last four bytes: Do PIO */
2477                 /*
2478                  * load what physical address of Scatter/Gather list table
2479                  * want to be transfer
2480                  */
2481                 srb->state |= SRB_DATA_XFER;
2482                 /* load total transfer length (24bits) max value 16Mbyte */
2483                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2484                                srb->total_xfer_length);
2485                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2486                 if (io_dir & DMACMD_DIR) {      /* read */
2487                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2488                                       SCMD_FIFO_IN);
2489                 } else {        /* write */
2490                         int ln = srb->total_xfer_length;
2491                         size_t left_io = srb->total_xfer_length;
2492
2493                         if (srb->dcb->sync_period & WIDE_SYNC)
2494                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2495                                      CFG2_WIDEFIFO);
2496
2497                         while (left_io) {
2498                                 unsigned char *virt, *base = NULL;
2499                                 unsigned long flags = 0;
2500                                 size_t len = left_io;
2501                                 size_t offset = srb->request_length - left_io;
2502
2503                                 local_irq_save(flags);
2504                                 /* Again, max 4 bytes */
2505                                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2506                                                            srb->sg_count, &offset, &len);
2507                                 virt = base + offset;
2508
2509                                 left_io -= len;
2510
2511                                 while (len--) {
2512                                         if (debug_enabled(DBG_PIO))
2513                                                 printk(" %02x", *virt);
2514
2515                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2516
2517                                         sg_subtract_one(srb);
2518                                 }
2519
2520                                 scsi_kunmap_atomic_sg(base);
2521                                 local_irq_restore(flags);
2522                         }
2523                         if (srb->dcb->sync_period & WIDE_SYNC) {
2524                                 if (ln % 2) {
2525                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2526                                         if (debug_enabled(DBG_PIO))
2527                                                 printk(" |00");
2528                                 }
2529                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2530                         }
2531                         /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2532                         if (debug_enabled(DBG_PIO))
2533                                 printk("\n");
2534                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2535                                           SCMD_FIFO_OUT);
2536                 }
2537         }
2538 #endif                          /* DC395x_LASTPIO */
2539         else {          /* xfer pad */
2540                 u8 data = 0, data2 = 0;
2541                 if (srb->sg_count) {
2542                         srb->adapter_status = H_OVER_UNDER_RUN;
2543                         srb->status |= OVER_RUN;
2544                 }
2545                 /*
2546                  * KG: despite the fact that we are using 16 bits I/O ops
2547                  * the SCSI FIFO is only 8 bits according to the docs
2548                  * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2549                  */
2550                 if (dcb->sync_period & WIDE_SYNC) {
2551                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2552                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2553                                       CFG2_WIDEFIFO);
2554                         if (io_dir & DMACMD_DIR) {
2555                                 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2556                                 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2557                         } else {
2558                                 /* Danger, Robinson: If you find KGs
2559                                  * scattered over the wide disk, the driver
2560                                  * or chip is to blame :-( */
2561                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2562                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2563                         }
2564                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2565                 } else {
2566                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2567                         /* Danger, Robinson: If you find a collection of Ks on your disk
2568                          * something broke :-( */
2569                         if (io_dir & DMACMD_DIR)
2570                                 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2571                         else
2572                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2573                 }
2574                 srb->state |= SRB_XFERPAD;
2575                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2576                 /* SCSI command */
2577                 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2578                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2579         }
2580 }
2581
2582
2583 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2584                 u16 *pscsi_status)
2585 {
2586         dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2587                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2588         srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2589         srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);      /* get message */
2590         srb->state = SRB_COMPLETED;
2591         *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
2592         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2593         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2594 }
2595
2596
2597 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2598                 u16 *pscsi_status)
2599 {
2600         dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2601                 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun);
2602         srb->state = SRB_STATUS;
2603         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2604         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2605 }
2606
2607
2608 /* Check if the message is complete */
2609 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2610 {
2611         if (*msgbuf == EXTENDED_MESSAGE) {
2612                 if (len < 2)
2613                         return 0;
2614                 if (len < msgbuf[1] + 2)
2615                         return 0;
2616         } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)  /* two byte messages */
2617                 if (len < 2)
2618                         return 0;
2619         return 1;
2620 }
2621
2622 /* reject_msg */
2623 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2624                 struct ScsiReqBlk *srb)
2625 {
2626         srb->msgout_buf[0] = MESSAGE_REJECT;
2627         srb->msg_count = 1;
2628         DC395x_ENABLE_MSGOUT;
2629         srb->state &= ~SRB_MSGIN;
2630         srb->state |= SRB_MSGOUT;
2631         dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2632                 srb->msgin_buf[0],
2633                 srb->dcb->target_id, srb->dcb->target_lun);
2634 }
2635
2636
2637 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2638                 struct DeviceCtlBlk *dcb, u8 tag)
2639 {
2640         struct ScsiReqBlk *srb = NULL;
2641         struct ScsiReqBlk *i;
2642         dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2643                    srb->cmd, tag, srb);
2644
2645         if (!(dcb->tag_mask & (1 << tag)))
2646                 dprintkl(KERN_DEBUG,
2647                         "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2648                         dcb->tag_mask, tag);
2649
2650         if (list_empty(&dcb->srb_going_list))
2651                 goto mingx0;
2652         list_for_each_entry(i, &dcb->srb_going_list, list) {
2653                 if (i->tag_number == tag) {
2654                         srb = i;
2655                         break;
2656                 }
2657         }
2658         if (!srb)
2659                 goto mingx0;
2660
2661         dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2662                 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2663         if (dcb->flag & ABORT_DEV_) {
2664                 /*srb->state = SRB_ABORT_SENT; */
2665                 enable_msgout_abort(acb, srb);
2666         }
2667
2668         if (!(srb->state & SRB_DISCONNECT))
2669                 goto mingx0;
2670
2671         memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2672         srb->state |= dcb->active_srb->state;
2673         srb->state |= SRB_DATA_XFER;
2674         dcb->active_srb = srb;
2675         /* How can we make the DORS happy? */
2676         return srb;
2677
2678       mingx0:
2679         srb = acb->tmp_srb;
2680         srb->state = SRB_UNEXPECT_RESEL;
2681         dcb->active_srb = srb;
2682         srb->msgout_buf[0] = MSG_ABORT_TAG;
2683         srb->msg_count = 1;
2684         DC395x_ENABLE_MSGOUT;
2685         dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2686         return srb;
2687 }
2688
2689
2690 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2691                 struct DeviceCtlBlk *dcb)
2692 {
2693         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2694         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2695         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2696         set_xfer_rate(acb, dcb);
2697 }
2698
2699
2700 /* set async transfer mode */
2701 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2702 {
2703         struct DeviceCtlBlk *dcb = srb->dcb;
2704         dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2705                 dcb->target_id, dcb->target_lun);
2706
2707         dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2708         dcb->sync_mode |= SYNC_NEGO_DONE;
2709         /*dcb->sync_period &= 0; */
2710         dcb->sync_offset = 0;
2711         dcb->min_nego_period = 200 >> 2;        /* 200ns <=> 5 MHz */
2712         srb->state &= ~SRB_DO_SYNC_NEGO;
2713         reprogram_regs(acb, dcb);
2714         if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2715             && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2716                 build_wdtr(acb, dcb, srb);
2717                 DC395x_ENABLE_MSGOUT;
2718                 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2719         }
2720 }
2721
2722
2723 /* set sync transfer mode */
2724 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2725 {
2726         struct DeviceCtlBlk *dcb = srb->dcb;
2727         u8 bval;
2728         int fact;
2729         dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2730                 "(%02i.%01i MHz) Offset %i\n",
2731                 dcb->target_id, srb->msgin_buf[3] << 2,
2732                 (250 / srb->msgin_buf[3]),
2733                 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2734                 srb->msgin_buf[4]);
2735
2736         if (srb->msgin_buf[4] > 15)
2737                 srb->msgin_buf[4] = 15;
2738         if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2739                 dcb->sync_offset = 0;
2740         else if (dcb->sync_offset == 0)
2741                 dcb->sync_offset = srb->msgin_buf[4];
2742         if (srb->msgin_buf[4] > dcb->sync_offset)
2743                 srb->msgin_buf[4] = dcb->sync_offset;
2744         else
2745                 dcb->sync_offset = srb->msgin_buf[4];
2746         bval = 0;
2747         while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2748                             || dcb->min_nego_period >
2749                             clock_period[bval]))
2750                 bval++;
2751         if (srb->msgin_buf[3] < clock_period[bval])
2752                 dprintkl(KERN_INFO,
2753                         "msgin_set_sync: Increase sync nego period to %ins\n",
2754                         clock_period[bval] << 2);
2755         srb->msgin_buf[3] = clock_period[bval];
2756         dcb->sync_period &= 0xf0;
2757         dcb->sync_period |= ALT_SYNC | bval;
2758         dcb->min_nego_period = srb->msgin_buf[3];
2759
2760         if (dcb->sync_period & WIDE_SYNC)
2761                 fact = 500;
2762         else
2763                 fact = 250;
2764
2765         dprintkl(KERN_INFO,
2766                 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2767                 dcb->target_id, (fact == 500) ? "Wide16" : "",
2768                 dcb->min_nego_period << 2, dcb->sync_offset,
2769                 (fact / dcb->min_nego_period),
2770                 ((fact % dcb->min_nego_period) * 10 +
2771                 dcb->min_nego_period / 2) / dcb->min_nego_period);
2772
2773         if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2774                 /* Reply with corrected SDTR Message */
2775                 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2776                         srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2777
2778                 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2779                 srb->msg_count = 5;
2780                 DC395x_ENABLE_MSGOUT;
2781                 dcb->sync_mode |= SYNC_NEGO_DONE;
2782         } else {
2783                 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2784                     && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2785                         build_wdtr(acb, dcb, srb);
2786                         DC395x_ENABLE_MSGOUT;
2787                         dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2788                 }
2789         }
2790         srb->state &= ~SRB_DO_SYNC_NEGO;
2791         dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2792
2793         reprogram_regs(acb, dcb);
2794 }
2795
2796
2797 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2798                 struct ScsiReqBlk *srb)
2799 {
2800         struct DeviceCtlBlk *dcb = srb->dcb;
2801         dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2802
2803         dcb->sync_period &= ~WIDE_SYNC;
2804         dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2805         dcb->sync_mode |= WIDE_NEGO_DONE;
2806         srb->state &= ~SRB_DO_WIDE_NEGO;
2807         reprogram_regs(acb, dcb);
2808         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2809             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2810                 build_sdtr(acb, dcb, srb);
2811                 DC395x_ENABLE_MSGOUT;
2812                 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2813         }
2814 }
2815
2816 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2817 {
2818         struct DeviceCtlBlk *dcb = srb->dcb;
2819         u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2820                    && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2821         dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2822
2823         if (srb->msgin_buf[3] > wide)
2824                 srb->msgin_buf[3] = wide;
2825         /* Completed */
2826         if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2827                 dprintkl(KERN_DEBUG,
2828                         "msgin_set_wide: Wide nego initiated <%02i>\n",
2829                         dcb->target_id);
2830                 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2831                 srb->msg_count = 4;
2832                 srb->state |= SRB_DO_WIDE_NEGO;
2833                 DC395x_ENABLE_MSGOUT;
2834         }
2835
2836         dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2837         if (srb->msgin_buf[3] > 0)
2838                 dcb->sync_period |= WIDE_SYNC;
2839         else
2840                 dcb->sync_period &= ~WIDE_SYNC;
2841         srb->state &= ~SRB_DO_WIDE_NEGO;
2842         /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2843         dprintkdbg(DBG_1,
2844                 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2845                 (8 << srb->msgin_buf[3]), dcb->target_id);
2846         reprogram_regs(acb, dcb);
2847         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2848             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2849                 build_sdtr(acb, dcb, srb);
2850                 DC395x_ENABLE_MSGOUT;
2851                 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2852         }
2853 }
2854
2855
2856 /*
2857  * extended message codes:
2858  *
2859  *      code    description
2860  *
2861  *      02h     Reserved
2862  *      00h     MODIFY DATA  POINTER
2863  *      01h     SYNCHRONOUS DATA TRANSFER REQUEST
2864  *      03h     WIDE DATA TRANSFER REQUEST
2865  *   04h - 7Fh  Reserved
2866  *   80h - FFh  Vendor specific
2867  */
2868 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2869                 u16 *pscsi_status)
2870 {
2871         struct DeviceCtlBlk *dcb = acb->active_dcb;
2872         dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2873
2874         srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2875         if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2876                 /* Now eval the msg */
2877                 switch (srb->msgin_buf[0]) {
2878                 case DISCONNECT:
2879                         srb->state = SRB_DISCONNECT;
2880                         break;
2881
2882                 case SIMPLE_QUEUE_TAG:
2883                 case HEAD_OF_QUEUE_TAG:
2884                 case ORDERED_QUEUE_TAG:
2885                         srb =
2886                             msgin_qtag(acb, dcb,
2887                                               srb->msgin_buf[1]);
2888                         break;
2889
2890                 case MESSAGE_REJECT:
2891                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2892                                        DO_CLRATN | DO_DATALATCH);
2893                         /* A sync nego message was rejected ! */
2894                         if (srb->state & SRB_DO_SYNC_NEGO) {
2895                                 msgin_set_async(acb, srb);
2896                                 break;
2897                         }
2898                         /* A wide nego message was rejected ! */
2899                         if (srb->state & SRB_DO_WIDE_NEGO) {
2900                                 msgin_set_nowide(acb, srb);
2901                                 break;
2902                         }
2903                         enable_msgout_abort(acb, srb);
2904                         /*srb->state |= SRB_ABORT_SENT */
2905                         break;
2906
2907                 case EXTENDED_MESSAGE:
2908                         /* SDTR */
2909                         if (srb->msgin_buf[1] == 3
2910                             && srb->msgin_buf[2] == EXTENDED_SDTR) {
2911                                 msgin_set_sync(acb, srb);
2912                                 break;
2913                         }
2914                         /* WDTR */
2915                         if (srb->msgin_buf[1] == 2
2916                             && srb->msgin_buf[2] == EXTENDED_WDTR
2917                             && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2918                                 msgin_set_wide(acb, srb);
2919                                 break;
2920                         }
2921                         msgin_reject(acb, srb);
2922                         break;
2923
2924                 case MSG_IGNOREWIDE:
2925                         /* Discard  wide residual */
2926                         dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2927                         break;
2928
2929                 case COMMAND_COMPLETE:
2930                         /* nothing has to be done */
2931                         break;
2932
2933                 case SAVE_POINTERS:
2934                         /*
2935                          * SAVE POINTER may be ignored as we have the struct
2936                          * ScsiReqBlk* associated with the scsi command.
2937                          */
2938                         dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2939                                 "SAVE POINTER rem=%i Ignore\n",
2940                                 srb->cmd, srb->total_xfer_length);
2941                         break;
2942
2943                 case RESTORE_POINTERS:
2944                         dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2945                         break;
2946
2947                 case ABORT:
2948                         dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2949                                 "<%02i-%i> ABORT msg\n",
2950                                 srb->cmd, dcb->target_id,
2951                                 dcb->target_lun);
2952                         dcb->flag |= ABORT_DEV_;
2953                         enable_msgout_abort(acb, srb);
2954                         break;
2955
2956                 default:
2957                         /* reject unknown messages */
2958                         if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2959                                 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2960                                 srb->msg_count = 1;
2961                                 srb->msgout_buf[0] = dcb->identify_msg;
2962                                 DC395x_ENABLE_MSGOUT;
2963                                 srb->state |= SRB_MSGOUT;
2964                                 /*break; */
2965                         }
2966                         msgin_reject(acb, srb);
2967                 }
2968
2969                 /* Clear counter and MsgIn state */
2970                 srb->state &= ~SRB_MSGIN;
2971                 acb->msg_len = 0;
2972         }
2973         *pscsi_status = PH_BUS_FREE;
2974         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important ... you know! */
2975         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2976 }
2977
2978
2979 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2980                 u16 *pscsi_status)
2981 {
2982         dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2983         clear_fifo(acb, "msgin_phase1");
2984         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2985         if (!(srb->state & SRB_MSGIN)) {
2986                 srb->state &= ~SRB_DISCONNECT;
2987                 srb->state |= SRB_MSGIN;
2988         }
2989         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2990         /* SCSI command */
2991         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2992 }
2993
2994
2995 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2996                 u16 *pscsi_status)
2997 {
2998 }
2999
3000
3001 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
3002                 u16 *pscsi_status)
3003 {
3004 }
3005
3006
3007 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3008 {
3009         struct DeviceCtlBlk *i;
3010
3011         /* set all lun device's  period, offset */
3012         if (dcb->identify_msg & 0x07)
3013                 return;
3014
3015         if (acb->scan_devices) {
3016                 current_sync_offset = dcb->sync_offset;
3017                 return;
3018         }
3019
3020         list_for_each_entry(i, &acb->dcb_list, list)
3021                 if (i->target_id == dcb->target_id) {
3022                         i->sync_period = dcb->sync_period;
3023                         i->sync_offset = dcb->sync_offset;
3024                         i->sync_mode = dcb->sync_mode;
3025                         i->min_nego_period = dcb->min_nego_period;
3026                 }
3027 }
3028
3029
3030 static void disconnect(struct AdapterCtlBlk *acb)
3031 {
3032         struct DeviceCtlBlk *dcb = acb->active_dcb;
3033         struct ScsiReqBlk *srb;
3034
3035         if (!dcb) {
3036                 dprintkl(KERN_ERR, "disconnect: No such device\n");
3037                 udelay(500);
3038                 /* Suspend queue for a while */
3039                 acb->last_reset =
3040                     jiffies + HZ / 2 +
3041                     HZ * acb->eeprom.delay_time;
3042                 clear_fifo(acb, "disconnectEx");
3043                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3044                 return;
3045         }
3046         srb = dcb->active_srb;
3047         acb->active_dcb = NULL;
3048         dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
3049
3050         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
3051         clear_fifo(acb, "disconnect");
3052         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3053         if (srb->state & SRB_UNEXPECT_RESEL) {
3054                 dprintkl(KERN_ERR,
3055                         "disconnect: Unexpected reselection <%02i-%i>\n",
3056                         dcb->target_id, dcb->target_lun);
3057                 srb->state = 0;
3058                 waiting_process_next(acb);
3059         } else if (srb->state & SRB_ABORT_SENT) {
3060                 dcb->flag &= ~ABORT_DEV_;
3061                 acb->last_reset = jiffies + HZ / 2 + 1;
3062                 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3063                 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3064                 waiting_process_next(acb);
3065         } else {
3066                 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3067                     || !(srb->
3068                          state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3069                         /*
3070                          * Selection time out
3071                          * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3072                          */
3073                         /* Unexp. Disc / Sel Timeout */
3074                         if (srb->state != SRB_START_
3075                             && srb->state != SRB_MSGOUT) {
3076                                 srb->state = SRB_READY;
3077                                 dprintkl(KERN_DEBUG,
3078                                         "disconnect: (0x%p) Unexpected\n",
3079                                         srb->cmd);
3080                                 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3081                                 goto disc1;
3082                         } else {
3083                                 /* Normal selection timeout */
3084                                 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
3085                                         "<%02i-%i> SelTO\n", srb->cmd,
3086                                         dcb->target_id, dcb->target_lun);
3087                                 if (srb->retry_count++ > DC395x_MAX_RETRIES
3088                                     || acb->scan_devices) {
3089                                         srb->target_status =
3090                                             SCSI_STAT_SEL_TIMEOUT;
3091                                         goto disc1;
3092                                 }
3093                                 free_tag(dcb, srb);
3094                                 srb_going_to_waiting_move(dcb, srb);
3095                                 dprintkdbg(DBG_KG,
3096                                         "disconnect: (0x%p) Retry\n",
3097                                         srb->cmd);
3098                                 waiting_set_timer(acb, HZ / 20);
3099                         }
3100                 } else if (srb->state & SRB_DISCONNECT) {
3101                         u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3102                         /*
3103                          * SRB_DISCONNECT (This is what we expect!)
3104                          */
3105                         if (bval & 0x40) {
3106                                 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3107                                         " 0x%02x: ACK set! Other controllers?\n",
3108                                         bval);
3109                                 /* It could come from another initiator, therefore don't do much ! */
3110                         } else
3111                                 waiting_process_next(acb);
3112                 } else if (srb->state & SRB_COMPLETED) {
3113                       disc1:
3114                         /*
3115                          ** SRB_COMPLETED
3116                          */
3117                         free_tag(dcb, srb);
3118                         dcb->active_srb = NULL;
3119                         srb->state = SRB_FREE;
3120                         srb_done(acb, dcb, srb);
3121                 }
3122         }
3123 }
3124
3125
3126 static void reselect(struct AdapterCtlBlk *acb)
3127 {
3128         struct DeviceCtlBlk *dcb = acb->active_dcb;
3129         struct ScsiReqBlk *srb = NULL;
3130         u16 rsel_tar_lun_id;
3131         u8 id, lun;
3132         u8 arblostflag = 0;
3133         dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3134
3135         clear_fifo(acb, "reselect");
3136         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3137         /* Read Reselected Target ID and LUN */
3138         rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3139         if (dcb) {              /* Arbitration lost but Reselection win */
3140                 srb = dcb->active_srb;
3141                 if (!srb) {
3142                         dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3143                                 "but active_srb == NULL\n");
3144                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3145                         return;
3146                 }
3147                 /* Why the if ? */
3148                 if (!acb->scan_devices) {
3149                         dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3150                                 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3151                                 srb->cmd, dcb->target_id,
3152                                 dcb->target_lun, rsel_tar_lun_id,
3153                                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3154                         arblostflag = 1;
3155                         /*srb->state |= SRB_DISCONNECT; */
3156
3157                         srb->state = SRB_READY;
3158                         free_tag(dcb, srb);
3159                         srb_going_to_waiting_move(dcb, srb);
3160                         waiting_set_timer(acb, HZ / 20);
3161
3162                         /* return; */
3163                 }
3164         }
3165         /* Read Reselected Target Id and LUN */
3166         if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3167                 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3168                         "Got %i!\n", rsel_tar_lun_id);
3169         id = rsel_tar_lun_id & 0xff;
3170         lun = (rsel_tar_lun_id >> 8) & 7;
3171         dcb = find_dcb(acb, id, lun);
3172         if (!dcb) {
3173                 dprintkl(KERN_ERR, "reselect: From non existent device "
3174                         "<%02i-%i>\n", id, lun);
3175                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3176                 return;
3177         }
3178         acb->active_dcb = dcb;
3179
3180         if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3181                 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3182                         "disconnection? <%02i-%i>\n",
3183                         dcb->target_id, dcb->target_lun);
3184
3185         if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3186                 srb = acb->tmp_srb;
3187                 dcb->active_srb = srb;
3188         } else {
3189                 /* There can be only one! */
3190                 srb = dcb->active_srb;
3191                 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3192                         /*
3193                          * abort command
3194                          */
3195                         dprintkl(KERN_DEBUG,
3196                                 "reselect: w/o disconnected cmds <%02i-%i>\n",
3197                                 dcb->target_id, dcb->target_lun);
3198                         srb = acb->tmp_srb;
3199                         srb->state = SRB_UNEXPECT_RESEL;
3200                         dcb->active_srb = srb;
3201                         enable_msgout_abort(acb, srb);
3202                 } else {
3203                         if (dcb->flag & ABORT_DEV_) {
3204                                 /*srb->state = SRB_ABORT_SENT; */
3205                                 enable_msgout_abort(acb, srb);
3206                         } else
3207                                 srb->state = SRB_DATA_XFER;
3208
3209                 }
3210         }
3211         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
3212
3213         /* Program HA ID, target ID, period and offset */
3214         dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3215         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);     /* host   ID */
3216         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);            /* target ID */
3217         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);            /* offset    */
3218         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);              /* sync period, wide */
3219         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);              /* it's important for atn stop */
3220         /* SCSI command */
3221         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3222 }
3223
3224
3225 static inline u8 tagq_blacklist(char *name)
3226 {
3227 #ifndef DC395x_NO_TAGQ
3228 #if 0
3229         u8 i;
3230         for (i = 0; i < BADDEVCNT; i++)
3231                 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3232                         return 1;
3233 #endif
3234         return 0;
3235 #else
3236         return 1;
3237 #endif
3238 }
3239
3240
3241 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3242 {
3243         /* Check for SCSI format (ANSI and Response data format) */
3244         if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3245                 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3246                     && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3247                     /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3248                     /* ((dcb->dev_type == TYPE_DISK)
3249                        || (dcb->dev_type == TYPE_MOD)) && */
3250                     !tagq_blacklist(((char *)ptr) + 8)) {
3251                         if (dcb->max_command == 1)
3252                                 dcb->max_command =
3253                                     dcb->acb->tag_max_num;
3254                         dcb->sync_mode |= EN_TAG_QUEUEING;
3255                         /*dcb->tag_mask = 0; */
3256                 } else
3257                         dcb->max_command = 1;
3258         }
3259 }
3260
3261
3262 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3263                 struct ScsiInqData *ptr)
3264 {
3265         u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3266         dcb->dev_type = bval1;
3267         /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3268         disc_tagq_set(dcb, ptr);
3269 }
3270
3271
3272 /* unmap mapped pci regions from SRB */
3273 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3274 {
3275         struct scsi_cmnd *cmd = srb->cmd;
3276         enum dma_data_direction dir = cmd->sc_data_direction;
3277
3278         if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3279                 /* unmap DC395x SG list */
3280                 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3281                         srb->sg_bus_addr, SEGMENTX_LEN);
3282                 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3283                                  SEGMENTX_LEN,
3284                                  PCI_DMA_TODEVICE);
3285                 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3286                            scsi_sg_count(cmd), scsi_bufflen(cmd));
3287                 /* unmap the sg segments */
3288                 scsi_dma_unmap(cmd);
3289         }
3290 }
3291
3292
3293 /* unmap mapped pci sense buffer from SRB */
3294 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3295                 struct ScsiReqBlk *srb)
3296 {
3297         if (!(srb->flag & AUTO_REQSENSE))
3298                 return;
3299         /* Unmap sense buffer */
3300         dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3301                srb->segment_x[0].address);
3302         pci_unmap_single(acb->dev, srb->segment_x[0].address,
3303                          srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3304         /* Restore SG stuff */
3305         srb->total_xfer_length = srb->xferred;
3306         srb->segment_x[0].address =
3307             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3308         srb->segment_x[0].length =
3309             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3310 }
3311
3312
3313 /*
3314  * Complete execution of a SCSI command
3315  * Signal completion to the generic SCSI driver
3316  */
3317 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3318                 struct ScsiReqBlk *srb)
3319 {
3320         u8 tempcnt, status;
3321         struct scsi_cmnd *cmd = srb->cmd;
3322         enum dma_data_direction dir = cmd->sc_data_direction;
3323         int ckc_only = 1;
3324
3325         dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3326                 srb->cmd->device->id, (u8)srb->cmd->device->lun);
3327         dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3328                    srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3329                    scsi_sgtalbe(cmd));
3330         status = srb->target_status;
3331         if (srb->flag & AUTO_REQSENSE) {
3332                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3333                 pci_unmap_srb_sense(acb, srb);
3334                 /*
3335                  ** target status..........................
3336                  */
3337                 srb->flag &= ~AUTO_REQSENSE;
3338                 srb->adapter_status = 0;
3339                 srb->target_status = CHECK_CONDITION << 1;
3340                 if (debug_enabled(DBG_1)) {
3341                         switch (cmd->sense_buffer[2] & 0x0f) {
3342                         case NOT_READY:
3343                                 dprintkl(KERN_DEBUG,
3344                                      "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3345                                      cmd->cmnd[0], dcb->target_id,
3346                                      dcb->target_lun, status, acb->scan_devices);
3347                                 break;
3348                         case UNIT_ATTENTION:
3349                                 dprintkl(KERN_DEBUG,
3350                                      "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3351                                      cmd->cmnd[0], dcb->target_id,
3352                                      dcb->target_lun, status, acb->scan_devices);
3353                                 break;
3354                         case ILLEGAL_REQUEST:
3355                                 dprintkl(KERN_DEBUG,
3356                                      "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3357                                      cmd->cmnd[0], dcb->target_id,
3358                                      dcb->target_lun, status, acb->scan_devices);
3359                                 break;
3360                         case MEDIUM_ERROR:
3361                                 dprintkl(KERN_DEBUG,
3362                                      "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3363                                      cmd->cmnd[0], dcb->target_id,
3364                                      dcb->target_lun, status, acb->scan_devices);
3365                                 break;
3366                         case HARDWARE_ERROR:
3367                                 dprintkl(KERN_DEBUG,
3368                                      "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3369                                      cmd->cmnd[0], dcb->target_id,
3370                                      dcb->target_lun, status, acb->scan_devices);
3371                                 break;
3372                         }
3373                         if (cmd->sense_buffer[7] >= 6)
3374                                 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3375                                         "(0x%08x 0x%08x)\n",
3376                                         cmd->sense_buffer[2], cmd->sense_buffer[12],
3377                                         cmd->sense_buffer[13],
3378                                         *((unsigned int *)(cmd->sense_buffer + 3)),
3379                                         *((unsigned int *)(cmd->sense_buffer + 8)));
3380                         else
3381                                 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3382                                         cmd->sense_buffer[2],
3383                                         *((unsigned int *)(cmd->sense_buffer + 3)));
3384                 }
3385
3386                 if (status == (CHECK_CONDITION << 1)) {
3387                         cmd->result = DID_BAD_TARGET << 16;
3388                         goto ckc_e;
3389                 }
3390                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3391
3392                 if (srb->total_xfer_length
3393                     && srb->total_xfer_length >= cmd->underflow)
3394                         cmd->result =
3395                             MK_RES_LNX(DRIVER_SENSE, DID_OK,
3396                                        srb->end_message, CHECK_CONDITION);
3397                 /*SET_RES_DID(cmd->result,DID_OK) */
3398                 else
3399                         cmd->result =
3400                             MK_RES_LNX(DRIVER_SENSE, DID_OK,
3401                                        srb->end_message, CHECK_CONDITION);
3402
3403                 goto ckc_e;
3404         }
3405
3406 /*************************************************************/
3407         if (status) {
3408                 /*
3409                  * target status..........................
3410                  */
3411                 if (status_byte(status) == CHECK_CONDITION) {
3412                         request_sense(acb, dcb, srb);
3413                         return;
3414                 } else if (status_byte(status) == QUEUE_FULL) {
3415                         tempcnt = (u8)list_size(&dcb->srb_going_list);
3416                         dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3417                              dcb->target_id, dcb->target_lun, tempcnt);
3418                         if (tempcnt > 1)
3419                                 tempcnt--;
3420                         dcb->max_command = tempcnt;
3421                         free_tag(dcb, srb);
3422                         srb_going_to_waiting_move(dcb, srb);
3423                         waiting_set_timer(acb, HZ / 20);
3424                         srb->adapter_status = 0;
3425                         srb->target_status = 0;
3426                         return;
3427                 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3428                         srb->adapter_status = H_SEL_TIMEOUT;
3429                         srb->target_status = 0;
3430                         cmd->result = DID_NO_CONNECT << 16;
3431                 } else {
3432                         srb->adapter_status = 0;
3433                         SET_RES_DID(cmd->result, DID_ERROR);
3434                         SET_RES_MSG(cmd->result, srb->end_message);
3435                         SET_RES_TARGET(cmd->result, status);
3436
3437                 }
3438         } else {
3439                 /*
3440                  ** process initiator status..........................
3441                  */
3442                 status = srb->adapter_status;
3443                 if (status & H_OVER_UNDER_RUN) {
3444                         srb->target_status = 0;
3445                         SET_RES_DID(cmd->result, DID_OK);
3446                         SET_RES_MSG(cmd->result, srb->end_message);
3447                 } else if (srb->status & PARITY_ERROR) {
3448                         SET_RES_DID(cmd->result, DID_PARITY);
3449                         SET_RES_MSG(cmd->result, srb->end_message);
3450                 } else {        /* No error */
3451
3452                         srb->adapter_status = 0;
3453                         srb->target_status = 0;
3454                         SET_RES_DID(cmd->result, DID_OK);
3455                 }
3456         }
3457
3458         ckc_only = 0;
3459 /* Check Error Conditions */
3460       ckc_e:
3461
3462         pci_unmap_srb(acb, srb);
3463
3464         if (cmd->cmnd[0] == INQUIRY) {
3465                 unsigned char *base = NULL;
3466                 struct ScsiInqData *ptr;
3467                 unsigned long flags = 0;
3468                 struct scatterlist* sg = scsi_sglist(cmd);
3469                 size_t offset = 0, len = sizeof(struct ScsiInqData);
3470
3471                 local_irq_save(flags);
3472                 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3473                 ptr = (struct ScsiInqData *)(base + offset);
3474
3475                 if (!ckc_only && (cmd->result & RES_DID) == 0
3476                     && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3477                     && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3478                         dcb->inquiry7 = ptr->Flags;
3479
3480         /*if( srb->cmd->cmnd[0] == INQUIRY && */
3481         /*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3482                 if ((cmd->result == (DID_OK << 16)
3483                      || status_byte(cmd->result) &
3484                      CHECK_CONDITION)) {
3485                         if (!dcb->init_tcq_flag) {
3486                                 add_dev(acb, dcb, ptr);
3487                                 dcb->init_tcq_flag = 1;
3488                         }
3489                 }
3490
3491                 scsi_kunmap_atomic_sg(base);
3492                 local_irq_restore(flags);
3493         }
3494
3495         /* Here is the info for Doug Gilbert's sg3 ... */
3496         scsi_set_resid(cmd, srb->total_xfer_length);
3497         /* This may be interpreted by sb. or not ... */
3498         cmd->SCp.this_residual = srb->total_xfer_length;
3499         cmd->SCp.buffers_residual = 0;
3500         if (debug_enabled(DBG_KG)) {
3501                 if (srb->total_xfer_length)
3502                         dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3503                                 "cmnd=0x%02x Missed %i bytes\n",
3504                                 cmd, cmd->device->id, (u8)cmd->device->lun,
3505                                 cmd->cmnd[0], srb->total_xfer_length);
3506         }
3507
3508         srb_going_remove(dcb, srb);
3509         /* Add to free list */
3510         if (srb == acb->tmp_srb)
3511                 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3512         else {
3513                 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3514                         cmd, cmd->result);
3515                 srb_free_insert(acb, srb);
3516         }
3517
3518         cmd->scsi_done(cmd);
3519         waiting_process_next(acb);
3520 }
3521
3522
3523 /* abort all cmds in our queues */
3524 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3525                 struct scsi_cmnd *cmd, u8 force)
3526 {
3527         struct DeviceCtlBlk *dcb;
3528         dprintkl(KERN_INFO, "doing_srb_done: pids ");
3529
3530         list_for_each_entry(dcb, &acb->dcb_list, list) {
3531                 struct ScsiReqBlk *srb;
3532                 struct ScsiReqBlk *tmp;
3533                 struct scsi_cmnd *p;
3534
3535                 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3536                         enum dma_data_direction dir;
3537                         int result;
3538
3539                         p = srb->cmd;
3540                         dir = p->sc_data_direction;
3541                         result = MK_RES(0, did_flag, 0, 0);
3542                         printk("G:%p(%02i-%i) ", p,
3543                                p->device->id, (u8)p->device->lun);
3544                         srb_going_remove(dcb, srb);
3545                         free_tag(dcb, srb);
3546                         srb_free_insert(acb, srb);
3547                         p->result = result;
3548                         pci_unmap_srb_sense(acb, srb);
3549                         pci_unmap_srb(acb, srb);
3550                         if (force) {
3551                                 /* For new EH, we normally don't need to give commands back,
3552                                  * as they all complete or all time out */
3553                                 p->scsi_done(p);
3554                         }
3555                 }
3556                 if (!list_empty(&dcb->srb_going_list))
3557                         dprintkl(KERN_DEBUG,
3558                                "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3559                                dcb->target_id, dcb->target_lun);
3560                 if (dcb->tag_mask)
3561                         dprintkl(KERN_DEBUG,
3562                                "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3563                                dcb->target_id, dcb->target_lun,
3564                                dcb->tag_mask);
3565
3566                 /* Waiting queue */
3567                 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3568                         int result;
3569                         p = srb->cmd;
3570
3571                         result = MK_RES(0, did_flag, 0, 0);
3572                         printk("W:%p<%02i-%i>", p, p->device->id,
3573                                (u8)p->device->lun);
3574                         srb_waiting_remove(dcb, srb);
3575                         srb_free_insert(acb, srb);
3576                         p->result = result;
3577                         pci_unmap_srb_sense(acb, srb);
3578                         pci_unmap_srb(acb, srb);
3579                         if (force) {
3580                                 /* For new EH, we normally don't need to give commands back,
3581                                  * as they all complete or all time out */
3582                                 cmd->scsi_done(cmd);
3583                         }
3584                 }
3585                 if (!list_empty(&dcb->srb_waiting_list))
3586                         dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3587                              list_size(&dcb->srb_waiting_list), dcb->target_id,
3588                              dcb->target_lun);
3589                 dcb->flag &= ~ABORT_DEV_;
3590         }
3591         printk("\n");
3592 }
3593
3594
3595 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3596 {
3597         dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3598         acb->acb_flag |= RESET_DEV;     /* RESET_DETECT, RESET_DONE, RESET_DEV */
3599         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3600
3601         while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3602                 /* nothing */;
3603 }
3604
3605
3606 static void set_basic_config(struct AdapterCtlBlk *acb)
3607 {
3608         u8 bval;
3609         u16 wval;
3610         DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3611         if (acb->config & HCC_PARITY)
3612                 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3613         else
3614                 bval = PHASELATCH | INITIATOR | BLOCKRST;
3615
3616         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3617
3618         /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3619         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);       /* was 0x13: default */
3620         /* program Host ID                  */
3621         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3622         /* set ansynchronous transfer       */
3623         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3624         /* Turn LED control off */
3625         wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3626         DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3627         /* DMA config          */
3628         wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3629         wval |=
3630             DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3631         DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3632         /* Clear pending interrupt status */
3633         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3634         /* Enable SCSI interrupt    */
3635         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3636         DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3637                       /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3638                       );
3639 }
3640
3641
3642 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3643 {
3644         dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3645         /* delay half a second */
3646         if (timer_pending(&acb->waiting_timer))
3647                 del_timer(&acb->waiting_timer);
3648
3649         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3650         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3651         /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3652         udelay(500);
3653         /* Maybe we locked up the bus? Then lets wait even longer ... */
3654         acb->last_reset =
3655             jiffies + 5 * HZ / 2 +
3656             HZ * acb->eeprom.delay_time;
3657
3658         clear_fifo(acb, "scsi_reset_detect");
3659         set_basic_config(acb);
3660         /*1.25 */
3661         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3662
3663         if (acb->acb_flag & RESET_DEV) {        /* RESET_DETECT, RESET_DONE, RESET_DEV */
3664                 acb->acb_flag |= RESET_DONE;
3665         } else {
3666                 acb->acb_flag |= RESET_DETECT;
3667                 reset_dev_param(acb);
3668                 doing_srb_done(acb, DID_RESET, NULL, 1);
3669                 /*DC395x_RecoverSRB( acb ); */
3670                 acb->active_dcb = NULL;
3671                 acb->acb_flag = 0;
3672                 waiting_process_next(acb);
3673         }
3674 }
3675
3676
3677 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3678                 struct ScsiReqBlk *srb)
3679 {
3680         struct scsi_cmnd *cmd = srb->cmd;
3681         dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3682                 cmd, cmd->device->id, (u8)cmd->device->lun);
3683
3684         srb->flag |= AUTO_REQSENSE;
3685         srb->adapter_status = 0;
3686         srb->target_status = 0;
3687
3688         /* KG: Can this prevent crap sense data ? */
3689         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3690
3691         /* Save some data */
3692         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3693             srb->segment_x[0].address;
3694         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3695             srb->segment_x[0].length;
3696         srb->xferred = srb->total_xfer_length;
3697         /* srb->segment_x : a one entry of S/G list table */
3698         srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3699         srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3700         /* Map sense buffer */
3701         srb->segment_x[0].address =
3702             pci_map_single(acb->dev, cmd->sense_buffer,
3703                            SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3704         dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3705                cmd->sense_buffer, srb->segment_x[0].address,
3706                SCSI_SENSE_BUFFERSIZE);
3707         srb->sg_count = 1;
3708         srb->sg_index = 0;
3709
3710         if (start_scsi(acb, dcb, srb)) {        /* Should only happen, if sb. else grabs the bus */
3711                 dprintkl(KERN_DEBUG,
3712                         "request_sense: (0x%p) failed <%02i-%i>\n",
3713                         srb->cmd, dcb->target_id, dcb->target_lun);
3714                 srb_going_to_waiting_move(dcb, srb);
3715                 waiting_set_timer(acb, HZ / 100);
3716         }
3717 }
3718
3719
3720 /**
3721  * device_alloc - Allocate a new device instance. This create the
3722  * devices instance and sets up all the data items. The adapter
3723  * instance is required to obtain confiuration information for this
3724  * device. This does *not* add this device to the adapters device
3725  * list.
3726  *
3727  * @acb: The adapter to obtain configuration information from.
3728  * @target: The target for the new device.
3729  * @lun: The lun for the new device.
3730  *
3731  * Return the new device if successful or NULL on failure.
3732  **/
3733 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3734                 u8 target, u8 lun)
3735 {
3736         struct NvRamType *eeprom = &acb->eeprom;
3737         u8 period_index = eeprom->target[target].period & 0x07;
3738         struct DeviceCtlBlk *dcb;
3739
3740         dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3741         dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3742         if (!dcb)
3743                 return NULL;
3744         dcb->acb = NULL;
3745         INIT_LIST_HEAD(&dcb->srb_going_list);
3746         INIT_LIST_HEAD(&dcb->srb_waiting_list);
3747         dcb->active_srb = NULL;
3748         dcb->tag_mask = 0;
3749         dcb->max_command = 1;
3750         dcb->target_id = target;
3751         dcb->target_lun = lun;
3752         dcb->dev_mode = eeprom->target[target].cfg0;
3753 #ifndef DC395x_NO_DISCONNECT
3754         dcb->identify_msg =
3755             IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3756 #else
3757         dcb->identify_msg = IDENTIFY(0, lun);
3758 #endif
3759         dcb->inquiry7 = 0;
3760         dcb->sync_mode = 0;
3761         dcb->min_nego_period = clock_period[period_index];
3762         dcb->sync_period = 0;
3763         dcb->sync_offset = 0;
3764         dcb->flag = 0;
3765
3766 #ifndef DC395x_NO_WIDE
3767         if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3768             && (acb->config & HCC_WIDE_CARD))
3769                 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3770 #endif
3771 #ifndef DC395x_NO_SYNC
3772         if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3773                 if (!(lun) || current_sync_offset)
3774                         dcb->sync_mode |= SYNC_NEGO_ENABLE;
3775 #endif
3776         if (dcb->target_lun != 0) {
3777                 /* Copy settings */
3778                 struct DeviceCtlBlk *p;
3779                 list_for_each_entry(p, &acb->dcb_list, list)
3780                         if (p->target_id == dcb->target_id)
3781                                 break;
3782                 dprintkdbg(DBG_1,
3783                        "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3784                        dcb->target_id, dcb->target_lun,
3785                        p->target_id, p->target_lun);
3786                 dcb->sync_mode = p->sync_mode;
3787                 dcb->sync_period = p->sync_period;
3788                 dcb->min_nego_period = p->min_nego_period;
3789                 dcb->sync_offset = p->sync_offset;
3790                 dcb->inquiry7 = p->inquiry7;
3791         }
3792         return dcb;
3793 }
3794
3795
3796 /**
3797  * adapter_add_device - Adds the device instance to the adaptor instance.
3798  *
3799  * @acb: The adapter device to be updated
3800  * @dcb: A newly created and initialised device instance to add.
3801  **/
3802 static void adapter_add_device(struct AdapterCtlBlk *acb,
3803                 struct DeviceCtlBlk *dcb)
3804 {
3805         /* backpointer to adapter */
3806         dcb->acb = acb;
3807
3808         /* set run_robin to this device if it is currently empty */
3809         if (list_empty(&acb->dcb_list))
3810                 acb->dcb_run_robin = dcb;
3811
3812         /* add device to list */
3813         list_add_tail(&dcb->list, &acb->dcb_list);
3814
3815         /* update device maps */
3816         acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3817         acb->children[dcb->target_id][dcb->target_lun] = dcb;
3818 }
3819
3820
3821 /**
3822  * adapter_remove_device - Removes the device instance from the adaptor
3823  * instance. The device instance is not check in any way or freed by this.
3824  * The caller is expected to take care of that. This will simply remove the
3825  * device from the adapters data strcutures.
3826  *
3827  * @acb: The adapter device to be updated
3828  * @dcb: A device that has previously been added to the adapter.
3829  **/
3830 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3831                 struct DeviceCtlBlk *dcb)
3832 {
3833         struct DeviceCtlBlk *i;
3834         struct DeviceCtlBlk *tmp;
3835         dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3836                 dcb->target_id, dcb->target_lun);
3837
3838         /* fix up any pointers to this device that we have in the adapter */
3839         if (acb->active_dcb == dcb)
3840                 acb->active_dcb = NULL;
3841         if (acb->dcb_run_robin == dcb)
3842                 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3843
3844         /* unlink from list */
3845         list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3846                 if (dcb == i) {
3847                         list_del(&i->list);
3848                         break;
3849                 }
3850
3851         /* clear map and children */
3852         acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3853         acb->children[dcb->target_id][dcb->target_lun] = NULL;
3854         dcb->acb = NULL;
3855 }
3856
3857
3858 /**
3859  * adapter_remove_and_free_device - Removes a single device from the adapter
3860  * and then frees the device information.
3861  *
3862  * @acb: The adapter device to be updated
3863  * @dcb: A device that has previously been added to the adapter.
3864  */
3865 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3866                 struct DeviceCtlBlk *dcb)
3867 {
3868         if (list_size(&dcb->srb_going_list) > 1) {
3869                 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3870                            "Won't remove because of %i active requests.\n",
3871                            dcb->target_id, dcb->target_lun,
3872                            list_size(&dcb->srb_going_list));
3873                 return;
3874         }
3875         adapter_remove_device(acb, dcb);
3876         kfree(dcb);
3877 }
3878
3879
3880 /**
3881  * adapter_remove_and_free_all_devices - Removes and frees all of the
3882  * devices associated with the specified adapter.
3883  *
3884  * @acb: The adapter from which all devices should be removed.
3885  **/
3886 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3887 {
3888         struct DeviceCtlBlk *dcb;
3889         struct DeviceCtlBlk *tmp;
3890         dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3891                    list_size(&acb->dcb_list));
3892
3893         list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3894                 adapter_remove_and_free_device(acb, dcb);
3895 }
3896
3897
3898 /**
3899  * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3900  * scsi device that we need to deal with. We allocate a new device and then
3901  * insert that device into the adapters device list.
3902  *
3903  * @scsi_device: The new scsi device that we need to handle.
3904  **/
3905 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3906 {
3907         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3908         struct DeviceCtlBlk *dcb;
3909
3910         dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3911         if (!dcb)
3912                 return -ENOMEM;
3913         adapter_add_device(acb, dcb);
3914
3915         return 0;
3916 }
3917
3918
3919 /**
3920  * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3921  * device that is going away.
3922  *
3923  * @scsi_device: The new scsi device that we need to handle.
3924  **/
3925 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3926 {
3927         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3928         struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3929         if (dcb)
3930                 adapter_remove_and_free_device(acb, dcb);
3931 }
3932
3933
3934
3935
3936 /**
3937  * trms1040_wait_30us: wait for 30 us
3938  *
3939  * Waits for 30us (using the chip by the looks of it..)
3940  *
3941  * @io_port: base I/O address
3942  **/
3943 static void trms1040_wait_30us(unsigned long io_port)
3944 {
3945         /* ScsiPortStallExecution(30); wait 30 us */
3946         outb(5, io_port + TRM_S1040_GEN_TIMER);
3947         while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3948                 /* nothing */ ;
3949 }
3950
3951
3952 /**
3953  * trms1040_write_cmd - write the secified command and address to
3954  * chip
3955  *
3956  * @io_port:    base I/O address
3957  * @cmd:        SB + op code (command) to send
3958  * @addr:       address to send
3959  **/
3960 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3961 {
3962         int i;
3963         u8 send_data;
3964
3965         /* program SB + OP code */
3966         for (i = 0; i < 3; i++, cmd <<= 1) {
3967                 send_data = NVR_SELECT;
3968                 if (cmd & 0x04) /* Start from bit 2 */
3969                         send_data |= NVR_BITOUT;
3970
3971                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3972                 trms1040_wait_30us(io_port);
3973                 outb((send_data | NVR_CLOCK),
3974                      io_port + TRM_S1040_GEN_NVRAM);
3975                 trms1040_wait_30us(io_port);
3976         }
3977
3978         /* send address */
3979         for (i = 0; i < 7; i++, addr <<= 1) {
3980                 send_data = NVR_SELECT;
3981                 if (addr & 0x40)        /* Start from bit 6 */
3982                         send_data |= NVR_BITOUT;
3983
3984                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3985                 trms1040_wait_30us(io_port);
3986                 outb((send_data | NVR_CLOCK),
3987                      io_port + TRM_S1040_GEN_NVRAM);
3988                 trms1040_wait_30us(io_port);
3989         }
3990         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3991         trms1040_wait_30us(io_port);
3992 }
3993
3994
3995 /**
3996  * trms1040_set_data - store a single byte in the eeprom
3997  *
3998  * Called from write all to write a single byte into the SSEEPROM
3999  * Which is done one bit at a time.
4000  *
4001  * @io_port:    base I/O address
4002  * @addr:       offset into EEPROM
4003  * @byte:       bytes to write
4004  **/
4005 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4006 {
4007         int i;
4008         u8 send_data;
4009
4010         /* Send write command & address */
4011         trms1040_write_cmd(io_port, 0x05, addr);
4012
4013         /* Write data */
4014         for (i = 0; i < 8; i++, byte <<= 1) {
4015                 send_data = NVR_SELECT;
4016                 if (byte & 0x80)        /* Start from bit 7 */
4017                         send_data |= NVR_BITOUT;
4018
4019                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4020                 trms1040_wait_30us(io_port);
4021                 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4022                 trms1040_wait_30us(io_port);
4023         }
4024         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4025         trms1040_wait_30us(io_port);
4026
4027         /* Disable chip select */
4028         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4029         trms1040_wait_30us(io_port);
4030
4031         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4032         trms1040_wait_30us(io_port);
4033
4034         /* Wait for write ready */
4035         while (1) {
4036                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4037                 trms1040_wait_30us(io_port);
4038
4039                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4040                 trms1040_wait_30us(io_port);
4041
4042                 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4043                         break;
4044         }
4045
4046         /*  Disable chip select */
4047         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4048 }
4049
4050
4051 /**
4052  * trms1040_write_all - write 128 bytes to the eeprom
4053  *
4054  * Write the supplied 128 bytes to the chips SEEPROM
4055  *
4056  * @eeprom:     the data to write
4057  * @io_port:    the base io port
4058  **/
4059 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4060 {
4061         u8 *b_eeprom = (u8 *)eeprom;
4062         u8 addr;
4063
4064         /* Enable SEEPROM */
4065         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4066              io_port + TRM_S1040_GEN_CONTROL);
4067
4068         /* write enable */
4069         trms1040_write_cmd(io_port, 0x04, 0xFF);
4070         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4071         trms1040_wait_30us(io_port);
4072
4073         /* write */
4074         for (addr = 0; addr < 128; addr++, b_eeprom++)
4075                 trms1040_set_data(io_port, addr, *b_eeprom);
4076
4077         /* write disable */
4078         trms1040_write_cmd(io_port, 0x04, 0x00);
4079         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4080         trms1040_wait_30us(io_port);
4081
4082         /* Disable SEEPROM */
4083         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4084              io_port + TRM_S1040_GEN_CONTROL);
4085 }
4086
4087
4088 /**
4089  * trms1040_get_data - get a single byte from the eeprom
4090  *
4091  * Called from read all to read a single byte into the SSEEPROM
4092  * Which is done one bit at a time.
4093  *
4094  * @io_port:    base I/O address
4095  * @addr:       offset into SEEPROM
4096  *
4097  * Returns the byte read.
4098  **/
4099 static u8 trms1040_get_data(unsigned long io_port, u8 addr)
4100 {
4101         int i;
4102         u8 read_byte;
4103         u8 result = 0;
4104
4105         /* Send read command & address */
4106         trms1040_write_cmd(io_port, 0x06, addr);
4107
4108         /* read data */
4109         for (i = 0; i < 8; i++) {
4110                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4111                 trms1040_wait_30us(io_port);
4112                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4113
4114                 /* Get data bit while falling edge */
4115                 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4116                 result <<= 1;
4117                 if (read_byte & NVR_BITIN)
4118                         result |= 1;
4119
4120                 trms1040_wait_30us(io_port);
4121         }
4122
4123         /* Disable chip select */
4124         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4125         return result;
4126 }
4127
4128
4129 /**
4130  * trms1040_read_all - read all bytes from the eeprom
4131  *
4132  * Read the 128 bytes from the SEEPROM.
4133  *
4134  * @eeprom:     where to store the data
4135  * @io_port:    the base io port
4136  **/
4137 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4138 {
4139         u8 *b_eeprom = (u8 *)eeprom;
4140         u8 addr;
4141
4142         /* Enable SEEPROM */
4143         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4144              io_port + TRM_S1040_GEN_CONTROL);
4145
4146         /* read details */
4147         for (addr = 0; addr < 128; addr++, b_eeprom++)
4148                 *b_eeprom = trms1040_get_data(io_port, addr);
4149
4150         /* Disable SEEPROM */
4151         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4152              io_port + TRM_S1040_GEN_CONTROL);
4153 }
4154
4155
4156
4157 /**
4158  * check_eeprom - get and check contents of the eeprom
4159  *
4160  * Read seeprom 128 bytes into the memory provider in eeprom.
4161  * Checks the checksum and if it's not correct it uses a set of default
4162  * values.
4163  *
4164  * @eeprom:     caller allocated strcuture to read the eeprom data into
4165  * @io_port:    io port to read from
4166  **/
4167 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4168 {
4169         u16 *w_eeprom = (u16 *)eeprom;
4170         u16 w_addr;
4171         u16 cksum;
4172         u32 d_addr;
4173         u32 *d_eeprom;
4174
4175         trms1040_read_all(eeprom, io_port);     /* read eeprom */
4176
4177         cksum = 0;
4178         for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4179              w_addr++, w_eeprom++)
4180                 cksum += *w_eeprom;
4181         if (cksum != 0x1234) {
4182                 /*
4183                  * Checksum is wrong.
4184                  * Load a set of defaults into the eeprom buffer
4185                  */
4186                 dprintkl(KERN_WARNING,
4187                         "EEProm checksum error: using default values and options.\n");
4188                 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4189                 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4190                 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4191                 eeprom->sub_sys_id[1] =
4192                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4193                 eeprom->sub_class = 0x00;
4194                 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4195                 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4196                 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4197                 eeprom->device_id[1] =
4198                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4199                 eeprom->reserved = 0x00;
4200
4201                 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4202                      d_addr < 16; d_addr++, d_eeprom++)
4203                         *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4204
4205                 *d_eeprom++ = 0x04000F07;       /* max_tag,delay_time,channel_cfg,scsi_id */
4206                 *d_eeprom++ = 0x00000015;       /* reserved1,boot_lun,boot_target,reserved0 */
4207                 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4208                         *d_eeprom = 0x00;
4209
4210                 /* Now load defaults (maybe set by boot/module params) */
4211                 set_safe_settings();
4212                 fix_settings();
4213                 eeprom_override(eeprom);
4214
4215                 eeprom->cksum = 0x00;
4216                 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4217                      w_addr < 63; w_addr++, w_eeprom++)
4218                         cksum += *w_eeprom;
4219
4220                 *w_eeprom = 0x1234 - cksum;
4221                 trms1040_write_all(eeprom, io_port);
4222                 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4223         } else {
4224                 set_safe_settings();
4225                 eeprom_index_to_delay(eeprom);
4226                 eeprom_override(eeprom);
4227         }
4228 }
4229
4230
4231 /**
4232  * print_eeprom_settings - output the eeprom settings
4233  * to the kernel log so people can see what they were.
4234  *
4235  * @eeprom: The eeprom data strucutre to show details for.
4236  **/
4237 static void print_eeprom_settings(struct NvRamType *eeprom)
4238 {
4239         dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4240                 eeprom->scsi_id,
4241                 eeprom->target[0].period,
4242                 clock_speed[eeprom->target[0].period] / 10,
4243                 clock_speed[eeprom->target[0].period] % 10,
4244                 eeprom->target[0].cfg0);
4245         dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4246                 eeprom->channel_cfg, eeprom->max_tag,
4247                 1 << eeprom->max_tag, eeprom->delay_time);
4248 }
4249
4250
4251 /* Free SG tables */
4252 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4253 {
4254         int i;
4255         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4256
4257         for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4258                 kfree(acb->srb_array[i].segment_x);
4259 }
4260
4261
4262 /*
4263  * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4264  * should never cross a page boundary */
4265 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4266 {
4267         const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4268                                     *SEGMENTX_LEN;
4269         int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4270         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4271         int srb_idx = 0;
4272         unsigned i = 0;
4273         struct SGentry *uninitialized_var(ptr);
4274
4275         for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4276                 acb->srb_array[i].segment_x = NULL;
4277
4278         dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4279         while (pages--) {
4280                 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4281                 if (!ptr) {
4282                         adapter_sg_tables_free(acb);
4283                         return 1;
4284                 }
4285                 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4286                         PAGE_SIZE, ptr, srb_idx);
4287                 i = 0;
4288                 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4289                         acb->srb_array[srb_idx++].segment_x =
4290                             ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4291         }
4292         if (i < srbs_per_page)
4293                 acb->srb.segment_x =
4294                     ptr + (i * DC395x_MAX_SG_LISTENTRY);
4295         else
4296                 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4297         return 0;
4298 }
4299
4300
4301
4302 /**
4303  * adapter_print_config - print adapter connection and termination
4304  * config
4305  *
4306  * The io port in the adapter needs to have been set before calling
4307  * this function.
4308  *
4309  * @acb: The adapter to print the information for.
4310  **/
4311 static void adapter_print_config(struct AdapterCtlBlk *acb)
4312 {
4313         u8 bval;
4314
4315         bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4316         dprintkl(KERN_INFO, "%sConnectors: ",
4317                 ((bval & WIDESCSI) ? "(Wide) " : ""));
4318         if (!(bval & CON5068))
4319                 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4320         if (!(bval & CON68))
4321                 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4322         if (!(bval & CON50))
4323                 printk("int50 ");
4324         if ((bval & (CON5068 | CON50 | CON68)) ==
4325             0 /*(CON5068 | CON50 | CON68) */ )
4326                 printk(" Oops! (All 3?) ");
4327         bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4328         printk(" Termination: ");
4329         if (bval & DIS_TERM)
4330                 printk("Disabled\n");
4331         else {
4332                 if (bval & AUTOTERM)
4333                         printk("Auto ");
4334                 if (bval & LOW8TERM)
4335                         printk("Low ");
4336                 if (bval & UP8TERM)
4337                         printk("High ");
4338                 printk("\n");
4339         }
4340 }
4341
4342
4343 /**
4344  * adapter_init_params - Initialize the various parameters in the
4345  * adapter structure. Note that the pointer to the scsi_host is set
4346  * early (when this instance is created) and the io_port and irq
4347  * values are set later after they have been reserved. This just gets
4348  * everything set to a good starting position.
4349  *
4350  * The eeprom structure in the adapter needs to have been set before
4351  * calling this function.
4352  *
4353  * @acb: The adapter to initialize.
4354  **/
4355 static void adapter_init_params(struct AdapterCtlBlk *acb)
4356 {
4357         struct NvRamType *eeprom = &acb->eeprom;
4358         int i;
4359
4360         /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4361         /* NOTE: acb->io_port_base is set at port registration time */
4362         /* NOTE: acb->io_port_len is set at port registration time */
4363
4364         INIT_LIST_HEAD(&acb->dcb_list);
4365         acb->dcb_run_robin = NULL;
4366         acb->active_dcb = NULL;
4367
4368         INIT_LIST_HEAD(&acb->srb_free_list);
4369         /*  temp SRB for Q tag used or abort command used  */
4370         acb->tmp_srb = &acb->srb;
4371         init_timer(&acb->waiting_timer);
4372         init_timer(&acb->selto_timer);
4373
4374         acb->srb_count = DC395x_MAX_SRB_CNT;
4375
4376         acb->sel_timeout = DC395x_SEL_TIMEOUT;  /* timeout=250ms */
4377         /* NOTE: acb->irq_level is set at IRQ registration time */
4378
4379         acb->tag_max_num = 1 << eeprom->max_tag;
4380         if (acb->tag_max_num > 30)
4381                 acb->tag_max_num = 30;
4382
4383         acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE, RESET_DEV */
4384         acb->gmode2 = eeprom->channel_cfg;
4385         acb->config = 0;        /* NOTE: actually set in adapter_init_chip */
4386
4387         if (eeprom->channel_cfg & NAC_SCANLUN)
4388                 acb->lun_chk = 1;
4389         acb->scan_devices = 1;
4390
4391         acb->scsi_host->this_id = eeprom->scsi_id;
4392         acb->hostid_bit = (1 << acb->scsi_host->this_id);
4393
4394         for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4395                 acb->dcb_map[i] = 0;
4396
4397         acb->msg_len = 0;
4398
4399         /* link static array of srbs into the srb free list */
4400         for (i = 0; i < acb->srb_count - 1; i++)
4401                 srb_free_insert(acb, &acb->srb_array[i]);
4402 }
4403
4404
4405 /**
4406  * adapter_init_host - Initialize the scsi host instance based on
4407  * values that we have already stored in the adapter instance. There's
4408  * some mention that a lot of these are deprecated, so we won't use
4409  * them (we'll use the ones in the adapter instance) but we'll fill
4410  * them in in case something else needs them.
4411  *
4412  * The eeprom structure, irq and io ports in the adapter need to have
4413  * been set before calling this function.
4414  *
4415  * @host: The scsi host instance to fill in the values for.
4416  **/
4417 static void adapter_init_scsi_host(struct Scsi_Host *host)
4418 {
4419         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4420         struct NvRamType *eeprom = &acb->eeprom;
4421
4422         host->max_cmd_len = 24;
4423         host->can_queue = DC395x_MAX_CMD_QUEUE;
4424         host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4425         host->this_id = (int)eeprom->scsi_id;
4426         host->io_port = acb->io_port_base;
4427         host->n_io_port = acb->io_port_len;
4428         host->dma_channel = -1;
4429         host->unique_id = acb->io_port_base;
4430         host->irq = acb->irq_level;
4431         acb->last_reset = jiffies;
4432
4433         host->max_id = 16;
4434         if (host->max_id - 1 == eeprom->scsi_id)
4435                 host->max_id--;
4436
4437         if (eeprom->channel_cfg & NAC_SCANLUN)
4438                 host->max_lun = 8;
4439         else
4440                 host->max_lun = 1;
4441 }
4442
4443
4444 /**
4445  * adapter_init_chip - Get the chip into a know state and figure out
4446  * some of the settings that apply to this adapter.
4447  *
4448  * The io port in the adapter needs to have been set before calling
4449  * this function. The config will be configured correctly on return.
4450  *
4451  * @acb: The adapter which we are to init.
4452  **/
4453 static void adapter_init_chip(struct AdapterCtlBlk *acb)
4454 {
4455         struct NvRamType *eeprom = &acb->eeprom;
4456
4457         /* Mask all the interrupt */
4458         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4459         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4460
4461         /* Reset SCSI module */
4462         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4463
4464         /* Reset PCI/DMA module */
4465         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4466         udelay(20);
4467
4468         /* program configuration 0 */
4469         acb->config = HCC_AUTOTERM | HCC_PARITY;
4470         if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4471                 acb->config |= HCC_WIDE_CARD;
4472
4473         if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4474                 acb->config |= HCC_SCSI_RESET;
4475
4476         if (acb->config & HCC_SCSI_RESET) {
4477                 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4478                 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4479
4480                 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4481                 /*spin_unlock_irq (&io_request_lock); */
4482                 udelay(500);
4483
4484                 acb->last_reset =
4485                     jiffies + HZ / 2 +
4486                     HZ * acb->eeprom.delay_time;
4487
4488                 /*spin_lock_irq (&io_request_lock); */
4489         }
4490 }
4491
4492
4493 /**
4494  * init_adapter - Grab the resource for the card, setup the adapter
4495  * information, set the card into a known state, create the various
4496  * tables etc etc. This basically gets all adapter information all up
4497  * to date, initialised and gets the chip in sync with it.
4498  *
4499  * @host:       This hosts adapter structure
4500  * @io_port:    The base I/O port
4501  * @irq:        IRQ
4502  *
4503  * Returns 0 if the initialization succeeds, any other value on
4504  * failure.
4505  **/
4506 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4507                         u32 io_port_len, unsigned int irq)
4508 {
4509         if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4510                 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4511                 goto failed;
4512         }
4513         /* store port base to indicate we have registered it */
4514         acb->io_port_base = io_port;
4515         acb->io_port_len = io_port_len;
4516
4517         if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4518                 /* release the region we just claimed */
4519                 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4520                 goto failed;
4521         }
4522         /* store irq to indicate we have registered it */
4523         acb->irq_level = irq;
4524
4525         /* get eeprom configuration information and command line settings etc */
4526         check_eeprom(&acb->eeprom, io_port);
4527         print_eeprom_settings(&acb->eeprom);
4528
4529         /* setup adapter control block */
4530         adapter_init_params(acb);
4531
4532         /* display card connectors/termination settings */
4533         adapter_print_config(acb);
4534
4535         if (adapter_sg_tables_alloc(acb)) {
4536                 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4537                 goto failed;
4538         }
4539         adapter_init_scsi_host(acb->scsi_host);
4540         adapter_init_chip(acb);
4541         set_basic_config(acb);
4542
4543         dprintkdbg(DBG_0,
4544                 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4545                 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4546                 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4547                 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4548         return 0;
4549
4550 failed:
4551         if (acb->irq_level)
4552                 free_irq(acb->irq_level, acb);
4553         if (acb->io_port_base)
4554                 release_region(acb->io_port_base, acb->io_port_len);
4555         adapter_sg_tables_free(acb);
4556
4557         return 1;
4558 }
4559
4560
4561 /**
4562  * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4563  * stopping all operations and disabling interrupt generation on the
4564  * card.
4565  *
4566  * @acb: The adapter which we are to shutdown.
4567  **/
4568 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4569 {
4570         /* disable interrupts */
4571         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4572         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4573
4574         /* reset the scsi bus */
4575         if (acb->config & HCC_SCSI_RESET)
4576                 reset_scsi_bus(acb);
4577
4578         /* clear any pending interrupt state */
4579         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4580 }
4581
4582
4583
4584 /**
4585  * adapter_uninit - Shut down the chip and release any resources that
4586  * we had allocated. Once this returns the adapter should not be used
4587  * anymore.
4588  *
4589  * @acb: The adapter which we are to un-initialize.
4590  **/
4591 static void adapter_uninit(struct AdapterCtlBlk *acb)
4592 {
4593         unsigned long flags;
4594         DC395x_LOCK_IO(acb->scsi_host, flags);
4595
4596         /* remove timers */
4597         if (timer_pending(&acb->waiting_timer))
4598                 del_timer(&acb->waiting_timer);
4599         if (timer_pending(&acb->selto_timer))
4600                 del_timer(&acb->selto_timer);
4601
4602         adapter_uninit_chip(acb);
4603         adapter_remove_and_free_all_devices(acb);
4604         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4605
4606         if (acb->irq_level)
4607                 free_irq(acb->irq_level, acb);
4608         if (acb->io_port_base)
4609                 release_region(acb->io_port_base, acb->io_port_len);
4610
4611         adapter_sg_tables_free(acb);
4612 }
4613
4614
4615 #undef YESNO
4616 #define YESNO(YN) \
4617  if (YN) seq_printf(m, " Yes ");\
4618  else seq_printf(m, " No  ")
4619
4620 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4621 {
4622         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4623         int spd, spd1;
4624         struct DeviceCtlBlk *dcb;
4625         unsigned long flags;
4626         int dev;
4627
4628         seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n"
4629                 " Driver Version " DC395X_VERSION "\n");
4630
4631         DC395x_LOCK_IO(acb->scsi_host, flags);
4632
4633         seq_printf(m, "SCSI Host Nr %i, ", host->host_no);
4634         seq_printf(m, "DC395U/UW/F DC315/U %s\n",
4635                 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4636         seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base);
4637         seq_printf(m, "irq_level 0x%04x, ", acb->irq_level);
4638         seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4639
4640         seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun);
4641         seq_printf(m, "AdapterID %i\n", host->this_id);
4642
4643         seq_printf(m, "tag_max_num %i", acb->tag_max_num);
4644         /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4645         seq_printf(m, ", FilterCfg 0x%02x",
4646                 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4647         seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time);
4648         /*seq_printf(m, "\n"); */
4649
4650         seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4651         seq_printf(m, "Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4652              acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4653              acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4654              acb->dcb_map[6], acb->dcb_map[7]);
4655         seq_printf(m, "                      %02x %02x %02x %02x %02x %02x %02x %02x\n",
4656              acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4657              acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4658              acb->dcb_map[14], acb->dcb_map[15]);
4659
4660         seq_puts(m,
4661                  "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4662
4663         dev = 0;
4664         list_for_each_entry(dcb, &acb->dcb_list, list) {
4665                 int nego_period;
4666                 seq_printf(m, "%02i %02i  %02i ", dev, dcb->target_id,
4667                         dcb->target_lun);
4668                 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4669                 YESNO(dcb->sync_offset);
4670                 YESNO(dcb->sync_period & WIDE_SYNC);
4671                 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4672                 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4673                 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4674                 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4675                 if (dcb->sync_offset)
4676                         seq_printf(m, "  %03i ns ", nego_period);
4677                 else
4678                         seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2));
4679
4680                 if (dcb->sync_offset & 0x0f) {
4681                         spd = 1000 / (nego_period);
4682                         spd1 = 1000 % (nego_period);
4683                         spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4684                         seq_printf(m, "   %2i.%1i M     %02i ", spd, spd1,
4685                                 (dcb->sync_offset & 0x0f));
4686                 } else
4687                         seq_puts(m, "                 ");
4688
4689                 /* Add more info ... */
4690                 seq_printf(m, "     %02i\n", dcb->max_command);
4691                 dev++;
4692         }
4693
4694         if (timer_pending(&acb->waiting_timer))
4695                 seq_puts(m, "Waiting queue timer running\n");
4696         else
4697                 seq_putc(m, '\n');
4698
4699         list_for_each_entry(dcb, &acb->dcb_list, list) {
4700                 struct ScsiReqBlk *srb;
4701                 if (!list_empty(&dcb->srb_waiting_list))
4702                         seq_printf(m, "DCB (%02i-%i): Waiting: %i:",
4703                                 dcb->target_id, dcb->target_lun,
4704                                 list_size(&dcb->srb_waiting_list));
4705                 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4706                         seq_printf(m, " %p", srb->cmd);
4707                 if (!list_empty(&dcb->srb_going_list))
4708                         seq_printf(m, "\nDCB (%02i-%i): Going  : %i:",
4709                                 dcb->target_id, dcb->target_lun,
4710                                 list_size(&dcb->srb_going_list));
4711                 list_for_each_entry(srb, &dcb->srb_going_list, list)
4712                         seq_printf(m, " %p", srb->cmd);
4713                 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4714                         seq_putc(m, '\n');
4715         }
4716
4717         if (debug_enabled(DBG_1)) {
4718                 seq_printf(m, "DCB list for ACB %p:\n", acb);
4719                 list_for_each_entry(dcb, &acb->dcb_list, list) {
4720                         seq_printf(m, "%p -> ", dcb);
4721                 }
4722                 seq_puts(m, "END\n");
4723         }
4724
4725         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4726         return 0;
4727 }
4728
4729
4730 static struct scsi_host_template dc395x_driver_template = {
4731         .module                 = THIS_MODULE,
4732         .proc_name              = DC395X_NAME,
4733         .show_info              = dc395x_show_info,
4734         .name                   = DC395X_BANNER " " DC395X_VERSION,
4735         .queuecommand           = dc395x_queue_command,
4736         .bios_param             = dc395x_bios_param,
4737         .slave_alloc            = dc395x_slave_alloc,
4738         .slave_destroy          = dc395x_slave_destroy,
4739         .can_queue              = DC395x_MAX_CAN_QUEUE,
4740         .this_id                = 7,
4741         .sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4742         .cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4743         .eh_abort_handler       = dc395x_eh_abort,
4744         .eh_bus_reset_handler   = dc395x_eh_bus_reset,
4745         .use_clustering         = DISABLE_CLUSTERING,
4746 };
4747
4748
4749 /**
4750  * banner_display - Display banner on first instance of driver
4751  * initialized.
4752  **/
4753 static void banner_display(void)
4754 {
4755         static int banner_done = 0;
4756         if (!banner_done)
4757         {
4758                 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4759                 banner_done = 1;
4760         }
4761 }
4762
4763
4764 /**
4765  * dc395x_init_one - Initialise a single instance of the adapter.
4766  *
4767  * The PCI layer will call this once for each instance of the adapter
4768  * that it finds in the system. The pci_dev strcuture indicates which
4769  * instance we are being called from.
4770  *
4771  * @dev: The PCI device to initialize.
4772  * @id: Looks like a pointer to the entry in our pci device table
4773  * that was actually matched by the PCI subsystem.
4774  *
4775  * Returns 0 on success, or an error code (-ve) on failure.
4776  **/
4777 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4778 {
4779         struct Scsi_Host *scsi_host = NULL;
4780         struct AdapterCtlBlk *acb = NULL;
4781         unsigned long io_port_base;
4782         unsigned int io_port_len;
4783         unsigned int irq;
4784
4785         dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4786         banner_display();
4787
4788         if (pci_enable_device(dev))
4789         {
4790                 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4791                 return -ENODEV;
4792         }
4793         io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4794         io_port_len = pci_resource_len(dev, 0);
4795         irq = dev->irq;
4796         dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4797
4798         /* allocate scsi host information (includes out adapter) */
4799         scsi_host = scsi_host_alloc(&dc395x_driver_template,
4800                                     sizeof(struct AdapterCtlBlk));
4801         if (!scsi_host) {
4802                 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4803                 goto fail;
4804         }
4805         acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4806         acb->scsi_host = scsi_host;
4807         acb->dev = dev;
4808
4809         /* initialise the adapter and everything we need */
4810         if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4811                 dprintkl(KERN_INFO, "adapter init failed\n");
4812                 acb = NULL;
4813                 goto fail;
4814         }
4815
4816         pci_set_master(dev);
4817
4818         /* get the scsi mid level to scan for new devices on the bus */
4819         if (scsi_add_host(scsi_host, &dev->dev)) {
4820                 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4821                 goto fail;
4822         }
4823         pci_set_drvdata(dev, scsi_host);
4824         scsi_scan_host(scsi_host);
4825
4826         return 0;
4827
4828 fail:
4829         if (acb != NULL)
4830                 adapter_uninit(acb);
4831         if (scsi_host != NULL)
4832                 scsi_host_put(scsi_host);
4833         pci_disable_device(dev);
4834         return -ENODEV;
4835 }
4836
4837
4838 /**
4839  * dc395x_remove_one - Called to remove a single instance of the
4840  * adapter.
4841  *
4842  * @dev: The PCI device to initialize.
4843  **/
4844 static void dc395x_remove_one(struct pci_dev *dev)
4845 {
4846         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4847         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4848
4849         dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4850
4851         scsi_remove_host(scsi_host);
4852         adapter_uninit(acb);
4853         pci_disable_device(dev);
4854         scsi_host_put(scsi_host);
4855 }
4856
4857
4858 static struct pci_device_id dc395x_pci_table[] = {
4859         {
4860                 .vendor         = PCI_VENDOR_ID_TEKRAM,
4861                 .device         = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4862                 .subvendor      = PCI_ANY_ID,
4863                 .subdevice      = PCI_ANY_ID,
4864          },
4865         {}                      /* Terminating entry */
4866 };
4867 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4868
4869
4870 static struct pci_driver dc395x_driver = {
4871         .name           = DC395X_NAME,
4872         .id_table       = dc395x_pci_table,
4873         .probe          = dc395x_init_one,
4874         .remove         = dc395x_remove_one,
4875 };
4876
4877
4878 /**
4879  * dc395x_module_init - Module initialization function
4880  *
4881  * Used by both module and built-in driver to initialise this driver.
4882  **/
4883 static int __init dc395x_module_init(void)
4884 {
4885         return pci_register_driver(&dc395x_driver);
4886 }
4887
4888
4889 /**
4890  * dc395x_module_exit - Module cleanup function.
4891  **/
4892 static void __exit dc395x_module_exit(void)
4893 {
4894         pci_unregister_driver(&dc395x_driver);
4895 }
4896
4897
4898 module_init(dc395x_module_init);
4899 module_exit(dc395x_module_exit);
4900
4901 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4902 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4903 MODULE_LICENSE("GPL");