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         u16 srb_count;
 312
 313         u8 sel_timeout;
 314
 315         unsigned int irq_level;
 316         u8 tag_max_num;
 317         u8 acb_flag;
 318         u8 gmode2;
 319
 320         u8 config;
 321         u8 lun_chk;
 322         u8 scan_devices;
 323         u8 hostid_bit;
 324
 325         u8 dcb_map[DC395x_MAX_SCSI_ID];
 326         struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
 327
 328         struct pci_dev *dev;
 329
 330         u8 msg_len;
 331
 332         struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
 333         struct ScsiReqBlk srb;
 334
 335         struct NvRamType eeprom;        /* eeprom settings for this adapter */
 336 };
 337
 338
 339 /*---------------------------------------------------------------------------
 340                             Forward declarations
 341  ---------------------------------------------------------------------------*/
 342 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 343                 u16 *pscsi_status);
 344 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 345                 u16 *pscsi_status);
 346 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 347                 u16 *pscsi_status);
 348 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 349                 u16 *pscsi_status);
 350 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 351                 u16 *pscsi_status);
 352 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 353                 u16 *pscsi_status);
 354 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 355                 u16 *pscsi_status);
 356 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 357                 u16 *pscsi_status);
 358 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 359                 u16 *pscsi_status);
 360 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 361                 u16 *pscsi_status);
 362 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 363                 u16 *pscsi_status);
 364 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 365                 u16 *pscsi_status);
 366 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 367                 u16 *pscsi_status);
 368 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 369                 u16 *pscsi_status);
 370 static void set_basic_config(struct AdapterCtlBlk *acb);
 371 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
 372                 struct ScsiReqBlk *srb);
 373 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
 374 static void data_io_transfer(struct AdapterCtlBlk *acb,
 375                 struct ScsiReqBlk *srb, u16 io_dir);
 376 static void disconnect(struct AdapterCtlBlk *acb);
 377 static void reselect(struct AdapterCtlBlk *acb);
 378 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 379                 struct ScsiReqBlk *srb);
 380 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
 381                 struct ScsiReqBlk *srb);
 382 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
 383                 struct ScsiReqBlk *srb);
 384 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
 385                 struct scsi_cmnd *cmd, u8 force);
 386 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
 387 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
 388 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
 389                 struct ScsiReqBlk *srb);
 390 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 391                 struct ScsiReqBlk *srb);
 392 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 393                 struct ScsiReqBlk *srb);
 394 static void set_xfer_rate(struct AdapterCtlBlk *acb,
 395                 struct DeviceCtlBlk *dcb);
 396 static void waiting_timeout(unsigned long ptr);
 397
 398
 399 /*---------------------------------------------------------------------------
 400                                  Static Data
 401  ---------------------------------------------------------------------------*/
 402 static u16 current_sync_offset = 0;
 403
 404 static void *dc395x_scsi_phase0[] = {
 405         data_out_phase0,/* phase:0 */
 406         data_in_phase0, /* phase:1 */
 407         command_phase0, /* phase:2 */
 408         status_phase0,  /* phase:3 */
 409         nop0,           /* phase:4 PH_BUS_FREE .. initial phase */
 410         nop0,           /* phase:5 PH_BUS_FREE .. initial phase */
 411         msgout_phase0,  /* phase:6 */
 412         msgin_phase0,   /* phase:7 */
 413 };
 414
 415 static void *dc395x_scsi_phase1[] = {
 416         data_out_phase1,/* phase:0 */
 417         data_in_phase1, /* phase:1 */
 418         command_phase1, /* phase:2 */
 419         status_phase1,  /* phase:3 */
 420         nop1,           /* phase:4 PH_BUS_FREE .. initial phase */
 421         nop1,           /* phase:5 PH_BUS_FREE .. initial phase */
 422         msgout_phase1,  /* phase:6 */
 423         msgin_phase1,   /* phase:7 */
 424 };
 425
 426 /*
 427  *Fast20:       000      50ns, 20.0 MHz
 428  *              001      75ns, 13.3 MHz
 429  *              010     100ns, 10.0 MHz
 430  *              011     125ns,  8.0 MHz
 431  *              100     150ns,  6.6 MHz
 432  *              101     175ns,  5.7 MHz
 433  *              110     200ns,  5.0 MHz
 434  *              111     250ns,  4.0 MHz
 435  *
 436  *Fast40(LVDS): 000      25ns, 40.0 MHz
 437  *              001      50ns, 20.0 MHz
 438  *              010      75ns, 13.3 MHz
 439  *              011     100ns, 10.0 MHz
 440  *              100     125ns,  8.0 MHz
 441  *              101     150ns,  6.6 MHz
 442  *              110     175ns,  5.7 MHz
 443  *              111     200ns,  5.0 MHz
 444  */
 445 /*static u8     clock_period[] = {12,19,25,31,37,44,50,62};*/
 446
 447 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
 448 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
 449 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
 450
 451
 452 /*---------------------------------------------------------------------------
 453                                 Configuration
 454   ---------------------------------------------------------------------------*/
 455 /*
 456  * Module/boot parameters currently effect *all* instances of the
 457  * card in the system.
 458  */
 459
 460 /*
 461  * Command line parameters are stored in a structure below.
 462  * These are the index's into the structure for the various
 463  * command line options.
 464  */
 465 #define CFG_ADAPTER_ID          0
 466 #define CFG_MAX_SPEED           1
 467 #define CFG_DEV_MODE            2
 468 #define CFG_ADAPTER_MODE        3
 469 #define CFG_TAGS                4
 470 #define CFG_RESET_DELAY         5
 471
 472 #define CFG_NUM                 6       /* number of configuration items */
 473
 474
 475 /*
 476  * Value used to indicate that a command line override
 477  * hasn't been used to modify the value.
 478  */
 479 #define CFG_PARAM_UNSET -1
 480
 481
 482 /*
 483  * Hold command line parameters.
 484  */
 485 struct ParameterData {
 486         int value;              /* value of this setting */
 487         int min;                /* minimum value */
 488         int max;                /* maximum value */
 489         int def;                /* default value */
 490         int safe;               /* safe value */
 491 };
 492 static struct ParameterData __devinitdata cfg_data[] = {
 493         { /* adapter id */
 494                 CFG_PARAM_UNSET,
 495                 0,
 496                 15,
 497                 7,
 498                 7
 499         },
 500         { /* max speed */
 501                 CFG_PARAM_UNSET,
 502                   0,
 503                   7,
 504                   1,    /* 13.3Mhz */
 505                   4,    /*  6.7Hmz */
 506         },
 507         { /* dev mode */
 508                 CFG_PARAM_UNSET,
 509                 0,
 510                 0x3f,
 511                 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
 512                         NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
 513                         NTC_DO_SEND_START,
 514                 NTC_DO_PARITY_CHK | NTC_DO_SEND_START
 515         },
 516         { /* adapter mode */
 517                 CFG_PARAM_UNSET,
 518                 0,
 519                 0x2f,
 520 #ifdef CONFIG_SCSI_MULTI_LUN
 521                         NAC_SCANLUN |
 522 #endif
 523                 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
 524                         /*| NAC_ACTIVE_NEG*/,
 525                 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
 526         },
 527         { /* tags */
 528                 CFG_PARAM_UNSET,
 529                 0,
 530                 5,
 531                 3,      /* 16 tags (??) */
 532                 2,
 533         },
 534         { /* reset delay */
 535                 CFG_PARAM_UNSET,
 536                 0,
 537                 180,
 538                 1,      /* 1 second */
 539                 10,     /* 10 seconds */
 540         }
 541 };
 542
 543
 544 /*
 545  * Safe settings. If set to zero the BIOS/default values with
 546  * command line overrides will be used. If set to 1 then safe and
 547  * slow settings will be used.
 548  */
 549 static int use_safe_settings = 0;
 550 module_param_named(safe, use_safe_settings, bool, 0);
 551 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
 552
 553
 554 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
 555 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
 556
 557 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
 558 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
 559
 560 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
 561 MODULE_PARM_DESC(dev_mode, "Device mode.");
 562
 563 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
 564 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
 565
 566 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
 567 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
 568
 569 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
 570 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
 571
 572
 573 /**
 574  * set_safe_settings - if the use_safe_settings option is set then
 575  * set all values to the safe and slow values.
 576  **/
 577 static void __devinit set_safe_settings(void)
 578 {
 579         if (use_safe_settings)
 580         {
 581                 int i;
 582
 583                 dprintkl(KERN_INFO, "Using safe settings.\n");
 584                 for (i = 0; i < CFG_NUM; i++)
 585                 {
 586                         cfg_data[i].value = cfg_data[i].safe;
 587                 }
 588         }
 589 }
 590
 591
 592 /**
 593  * fix_settings - reset any boot parameters which are out of range
 594  * back to the default values.
 595  **/
 596 static void __devinit fix_settings(void)
 597 {
 598         int i;
 599
 600         dprintkdbg(DBG_1,
 601                 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
 602                 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
 603                 cfg_data[CFG_ADAPTER_ID].value,
 604                 cfg_data[CFG_MAX_SPEED].value,
 605                 cfg_data[CFG_DEV_MODE].value,
 606                 cfg_data[CFG_ADAPTER_MODE].value,
 607                 cfg_data[CFG_TAGS].value,
 608                 cfg_data[CFG_RESET_DELAY].value);
 609         for (i = 0; i < CFG_NUM; i++)
 610         {
 611                 if (cfg_data[i].value < cfg_data[i].min
 612                     || cfg_data[i].value > cfg_data[i].max)
 613                         cfg_data[i].value = cfg_data[i].def;
 614         }
 615 }
 616
 617
 618
 619 /*
 620  * Mapping from the eeprom delay index value (index into this array)
 621  * to the number of actual seconds that the delay should be for.
 622  */
 623 static char __devinitdata eeprom_index_to_delay_map[] =
 624         { 1, 3, 5, 10, 16, 30, 60, 120 };
 625
 626
 627 /**
 628  * eeprom_index_to_delay - Take the eeprom delay setting and convert it
 629  * into a number of seconds.
 630  *
 631  * @eeprom: The eeprom structure in which we find the delay index to map.
 632  **/
 633 static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
 634 {
 635         eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
 636 }
 637
 638
 639 /**
 640  * delay_to_eeprom_index - Take a delay in seconds and return the
 641  * closest eeprom index which will delay for at least that amount of
 642  * seconds.
 643  *
 644  * @delay: The delay, in seconds, to find the eeprom index for.
 645  **/
 646 static int __devinit delay_to_eeprom_index(int delay)
 647 {
 648         u8 idx = 0;
 649         while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
 650                 idx++;
 651         return idx;
 652 }
 653
 654
 655 /**
 656  * eeprom_override - Override the eeprom settings, in the provided
 657  * eeprom structure, with values that have been set on the command
 658  * line.
 659  *
 660  * @eeprom: The eeprom data to override with command line options.
 661  **/
 662 static void __devinit eeprom_override(struct NvRamType *eeprom)
 663 {
 664         u8 id;
 665
 666         /* Adapter Settings */
 667         if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
 668                 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
 669
 670         if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
 671                 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
 672
 673         if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
 674                 eeprom->delay_time = delay_to_eeprom_index(
 675                                         cfg_data[CFG_RESET_DELAY].value);
 676
 677         if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
 678                 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
 679
 680         /* Device Settings */
 681         for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
 682                 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
 683                         eeprom->target[id].cfg0 =
 684                                 (u8)cfg_data[CFG_DEV_MODE].value;
 685
 686                 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
 687                         eeprom->target[id].period =
 688                                 (u8)cfg_data[CFG_MAX_SPEED].value;
 689
 690         }
 691 }
 692
 693
 694 /*---------------------------------------------------------------------------
 695  ---------------------------------------------------------------------------*/
 696
 697 static unsigned int list_size(struct list_head *head)
 698 {
 699         unsigned int count = 0;
 700         struct list_head *pos;
 701         list_for_each(pos, head)
 702                 count++;
 703         return count;
 704 }
 705
 706
 707 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
 708                 struct DeviceCtlBlk *pos)
 709 {
 710         int use_next = 0;
 711         struct DeviceCtlBlk* next = NULL;
 712         struct DeviceCtlBlk* i;
 713
 714         if (list_empty(head))
 715                 return NULL;
 716
 717         /* find supplied dcb and then select the next one */
 718         list_for_each_entry(i, head, list)
 719                 if (use_next) {
 720                         next = i;
 721                         break;
 722                 } else if (i == pos) {
 723                         use_next = 1;
 724                 }
 725         /* if no next one take the head one (ie, wraparound) */
 726         if (!next)
 727                 list_for_each_entry(i, head, list) {
 728                         next = i;
 729                         break;
 730                 }
 731
 732         return next;
 733 }
 734
 735
 736 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
 737 {
 738         if (srb->tag_number < 255) {
 739                 dcb->tag_mask &= ~(1 << srb->tag_number);       /* free tag mask */
 740                 srb->tag_number = 255;
 741         }
 742 }
 743
 744
 745 /* Find cmd in SRB list */
 746 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
 747                 struct list_head *head)
 748 {
 749         struct ScsiReqBlk *i;
 750         list_for_each_entry(i, head, list)
 751                 if (i->cmd == cmd)
 752                         return i;
 753         return NULL;
 754 }
 755
 756
 757 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
 758 {
 759         struct list_head *head = &acb->srb_free_list;
 760         struct ScsiReqBlk *srb = NULL;
 761
 762         if (!list_empty(head)) {
 763                 srb = list_entry(head->next, struct ScsiReqBlk, list);
 764                 list_del(head->next);
 765                 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
 766         }
 767         return srb;
 768 }
 769
 770
 771 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
 772 {
 773         dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
 774         list_add_tail(&srb->list, &acb->srb_free_list);
 775 }
 776
 777
 778 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
 779                 struct ScsiReqBlk *srb)
 780 {
 781         dprintkdbg(DBG_0, "srb_waiting_insert: (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->scsi_host->last_reset - HZ / 2))
 864                 acb->waiting_timer.expires =
 865                     acb->scsi_host->last_reset - HZ / 2 + 1;
 866         else
 867                 acb->waiting_timer.expires = jiffies + to + 1;
 868         add_timer(&acb->waiting_timer);
 869 }
 870
 871
 872 /* Send the next command from the waiting list to the bus */
 873 static void waiting_process_next(struct AdapterCtlBlk *acb)
 874 {
 875         struct DeviceCtlBlk *start = NULL;
 876         struct DeviceCtlBlk *pos;
 877         struct DeviceCtlBlk *dcb;
 878         struct ScsiReqBlk *srb;
 879         struct list_head *dcb_list_head = &acb->dcb_list;
 880
 881         if (acb->active_dcb
 882             || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
 883                 return;
 884
 885         if (timer_pending(&acb->waiting_timer))
 886                 del_timer(&acb->waiting_timer);
 887
 888         if (list_empty(dcb_list_head))
 889                 return;
 890
 891         /*
 892          * Find the starting dcb. Need to find it again in the list
 893          * since the list may have changed since we set the ptr to it
 894          */
 895         list_for_each_entry(dcb, dcb_list_head, list)
 896                 if (dcb == acb->dcb_run_robin) {
 897                         start = dcb;
 898                         break;
 899                 }
 900         if (!start) {
 901                 /* This can happen! */
 902                 start = list_entry(dcb_list_head->next, typeof(*start), list);
 903                 acb->dcb_run_robin = start;
 904         }
 905
 906
 907         /*
 908          * Loop over the dcb, but we start somewhere (potentially) in
 909          * the middle of the loop so we need to manully do this.
 910          */
 911         pos = start;
 912         do {
 913                 struct list_head *waiting_list_head = &pos->srb_waiting_list;
 914
 915                 /* Make sure, the next another device gets scheduled ... */
 916                 acb->dcb_run_robin = dcb_get_next(dcb_list_head,
 917                                                   acb->dcb_run_robin);
 918
 919                 if (list_empty(waiting_list_head) ||
 920                     pos->max_command <= list_size(&pos->srb_going_list)) {
 921                         /* move to next dcb */
 922                         pos = dcb_get_next(dcb_list_head, pos);
 923                 } else {
 924                         srb = list_entry(waiting_list_head->next,
 925                                          struct ScsiReqBlk, list);
 926
 927                         /* Try to send to the bus */
 928                         if (!start_scsi(acb, pos, srb))
 929                                 srb_waiting_to_going_move(pos, srb);
 930                         else
 931                                 waiting_set_timer(acb, HZ/50);
 932                         break;
 933                 }
 934         } while (pos != start);
 935 }
 936
 937
 938 /* Wake up waiting queue */
 939 static void waiting_timeout(unsigned long ptr)
 940 {
 941         unsigned long flags;
 942         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
 943         dprintkdbg(DBG_1,
 944                 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
 945         DC395x_LOCK_IO(acb->scsi_host, flags);
 946         waiting_process_next(acb);
 947         DC395x_UNLOCK_IO(acb->scsi_host, flags);
 948 }
 949
 950
 951 /* Get the DCB for a given ID/LUN combination */
 952 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
 953 {
 954         return acb->children[id][lun];
 955 }
 956
 957
 958 /* Send SCSI Request Block (srb) to adapter (acb) */
 959 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
 960 {
 961         struct DeviceCtlBlk *dcb = srb->dcb;
 962
 963         if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
 964             acb->active_dcb ||
 965             (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
 966                 srb_waiting_append(dcb, srb);
 967                 waiting_process_next(acb);
 968                 return;
 969         }
 970
 971         if (!start_scsi(acb, dcb, srb))
 972                 srb_going_append(dcb, srb);
 973         else {
 974                 srb_waiting_insert(dcb, srb);
 975                 waiting_set_timer(acb, HZ / 50);
 976         }
 977 }
 978
 979 /* 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, 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, 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, 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                                 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, 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->scsi_host->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, 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->scsi_host->last_reset + HZ / 2))
1466                 acb->selto_timer.expires =
1467                     acb->scsi_host->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->scsi_host->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                                 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, 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                         psge->length -= xferred;
1976                         psge->address += xferred;
1977                         srb->sg_index = idx;
1978                         pci_dma_sync_single_for_device(srb->dcb->
1979                                             acb->dev,
1980                                             srb->sg_bus_addr,
1981                                             SEGMENTX_LEN,
1982                                             PCI_DMA_TODEVICE);
1983                         break;
1984                 }
1985                 psge++;
1986         }
1987         sg_verify_length(srb);
1988 }
1989
1990
1991 /*
1992  * We have transferred a single byte (PIO mode?) and need to update
1993  * the count of bytes remaining (total_xfer_length) and update the sg
1994  * entry to either point to next byte in the current sg entry, or of
1995  * already at the end to point to the start of the next sg entry
1996  */
1997 static void sg_subtract_one(struct ScsiReqBlk *srb)
1998 {
1999         sg_update_list(srb, srb->total_xfer_length - 1);
2000 }
2001
2002
2003 /*
2004  * cleanup_after_transfer
2005  *
2006  * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2007  * KG: Currently called from  StatusPhase1 ()
2008  * Should probably also be called from other places
2009  * Best might be to call it in DataXXPhase0, if new phase will differ
2010  */
2011 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2012                 struct ScsiReqBlk *srb)
2013 {
2014         /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2015         if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {       /* read */
2016                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2017                         clear_fifo(acb, "cleanup/in");
2018                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2019                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2020         } else {                /* write */
2021                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2022                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2023                 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2024                         clear_fifo(acb, "cleanup/out");
2025         }
2026         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2027 }
2028
2029
2030 /*
2031  * Those no of bytes will be transferred w/ PIO through the SCSI FIFO
2032  * Seems to be needed for unknown reasons; could be a hardware bug :-(
2033  */
2034 #define DC395x_LASTPIO 4
2035
2036
2037 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2038                 u16 *pscsi_status)
2039 {
2040         struct DeviceCtlBlk *dcb = srb->dcb;
2041         u16 scsi_status = *pscsi_status;
2042         u32 d_left_counter = 0;
2043         dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n",
2044                 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2045
2046         /*
2047          * KG: We need to drain the buffers before we draw any conclusions!
2048          * This means telling the DMA to push the rest into SCSI, telling
2049          * SCSI to push the rest to the bus.
2050          * However, the device might have been the one to stop us (phase
2051          * change), and the data in transit just needs to be accounted so
2052          * it can be retransmitted.)
2053          */
2054         /*
2055          * KG: Stop DMA engine pushing more data into the SCSI FIFO
2056          * If we need more data, the DMA SG list will be freshly set up, anyway
2057          */
2058         dprintkdbg(DBG_PIO, "data_out_phase0: "
2059                 "DMA{fifocnt=0x%02x fifostat=0x%02x} "
2060                 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2061                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2062                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2063                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2064                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2065                 srb->total_xfer_length);
2066         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2067
2068         if (!(srb->state & SRB_XFERPAD)) {
2069                 if (scsi_status & PARITYERROR)
2070                         srb->status |= PARITY_ERROR;
2071
2072                 /*
2073                  * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2074                  * is the no of bytes it got from the DMA engine not the no it
2075                  * transferred successfully to the device. (And the difference could
2076                  * be as much as the FIFO size, I guess ...)
2077                  */
2078                 if (!(scsi_status & SCSIXFERDONE)) {
2079                         /*
2080                          * when data transfer from DMA FIFO to SCSI FIFO
2081                          * if there was some data left in SCSI FIFO
2082                          */
2083                         d_left_counter =
2084                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2085                                   0x1F);
2086                         if (dcb->sync_period & WIDE_SYNC)
2087                                 d_left_counter <<= 1;
2088
2089                         dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2090                                 "SCSI{fifocnt=0x%02x cnt=0x%08x} "
2091                                 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2092                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2093                                 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2094                                 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2095                                 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2096                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2097                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2098                                 DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2099                 }
2100                 /*
2101                  * calculate all the residue data that not yet tranfered
2102                  * SCSI transfer counter + left in SCSI FIFO data
2103                  *
2104                  * .....TRM_S1040_SCSI_COUNTER (24bits)
2105                  * The counter always decrement by one for every SCSI byte transfer.
2106                  * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2107                  * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2108                  */
2109                 if (srb->total_xfer_length > DC395x_LASTPIO)
2110                         d_left_counter +=
2111                             DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2112
2113                 /* Is this a good idea? */
2114                 /*clear_fifo(acb, "DOP1"); */
2115                 /* KG: What is this supposed to be useful for? WIDE padding stuff? */
2116                 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2117                     && scsi_bufflen(srb->cmd) % 2) {
2118                         d_left_counter = 0;
2119                         dprintkl(KERN_INFO,
2120                                 "data_out_phase0: Discard 1 byte (0x%02x)\n",
2121                                 scsi_status);
2122                 }
2123                 /*
2124                  * KG: Oops again. Same thinko as above: The SCSI might have been
2125                  * faster than the DMA engine, so that it ran out of data.
2126                  * In that case, we have to do just nothing!
2127                  * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2128                  */
2129                 /*
2130                  * KG: This is nonsense: We have been WRITING data to the bus
2131                  * If the SCSI engine has no bytes left, how should the DMA engine?
2132                  */
2133                 if (d_left_counter == 0) {
2134                         srb->total_xfer_length = 0;
2135                 } else {
2136                         /*
2137                          * if transfer not yet complete
2138                          * there were some data residue in SCSI FIFO or
2139                          * SCSI transfer counter not empty
2140                          */
2141                         long oldxferred =
2142                             srb->total_xfer_length - d_left_counter;
2143                         const int diff =
2144                             (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2145                         sg_update_list(srb, d_left_counter);
2146                         /* KG: Most ugly hack! Apparently, this works around a chip bug */
2147                         if ((srb->segment_x[srb->sg_index].length ==
2148                              diff && scsi_sg_count(srb->cmd))
2149                             || ((oldxferred & ~PAGE_MASK) ==
2150                                 (PAGE_SIZE - diff))
2151                             ) {
2152                                 dprintkl(KERN_INFO, "data_out_phase0: "
2153                                         "Work around chip bug (%i)?\n", diff);
2154                                 d_left_counter =
2155                                     srb->total_xfer_length - diff;
2156                                 sg_update_list(srb, d_left_counter);
2157                                 /*srb->total_xfer_length -= diff; */
2158                                 /*srb->virt_addr += diff; */
2159                                 /*if (srb->cmd->use_sg) */
2160                                 /*      srb->sg_index++; */
2161                         }
2162                 }
2163         }
2164         if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2165                 cleanup_after_transfer(acb, srb);
2166         }
2167 }
2168
2169
2170 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2171                 u16 *pscsi_status)
2172 {
2173         dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n",
2174                 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2175         clear_fifo(acb, "data_out_phase1");
2176         /* do prepare before transfer when data out phase */
2177         data_io_transfer(acb, srb, XFERDATAOUT);
2178 }
2179
2180 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2181                 u16 *pscsi_status)
2182 {
2183         u16 scsi_status = *pscsi_status;
2184
2185         dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n",
2186                 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2187
2188         /*
2189          * KG: DataIn is much more tricky than DataOut. When the device is finished
2190          * and switches to another phase, the SCSI engine should be finished too.
2191          * But: There might still be bytes left in its FIFO to be fetched by the DMA
2192          * engine and transferred to memory.
2193          * We should wait for the FIFOs to be emptied by that (is there any way to
2194          * enforce this?) and then stop the DMA engine, because it might think, that
2195          * there are more bytes to follow. Yes, the device might disconnect prior to
2196          * having all bytes transferred!
2197          * Also we should make sure that all data from the DMA engine buffer's really
2198          * made its way to the system memory! Some documentation on this would not
2199          * seem to be a bad idea, actually.
2200          */
2201         if (!(srb->state & SRB_XFERPAD)) {
2202                 u32 d_left_counter;
2203                 unsigned int sc, fc;
2204
2205                 if (scsi_status & PARITYERROR) {
2206                         dprintkl(KERN_INFO, "data_in_phase0: (0x%p) "
2207                                 "Parity Error\n", srb->cmd);
2208                         srb->status |= PARITY_ERROR;
2209                 }
2210                 /*
2211                  * KG: We should wait for the DMA FIFO to be empty ...
2212                  * but: it would be better to wait first for the SCSI FIFO and then the
2213                  * the DMA FIFO to become empty? How do we know, that the device not already
2214                  * sent data to the FIFO in a MsgIn phase, eg.?
2215                  */
2216                 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2217 #if 0
2218                         int ctr = 6000000;
2219                         dprintkl(KERN_DEBUG,
2220                                 "DIP0: Wait for DMA FIFO to flush ...\n");
2221                         /*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2222                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2223                         /*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2224                         while (!
2225                                (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2226                                 0x80) && --ctr);
2227                         if (ctr < 6000000 - 1)
2228                                 dprintkl(KERN_DEBUG
2229                                        "DIP0: Had to wait for DMA ...\n");
2230                         if (!ctr)
2231                                 dprintkl(KERN_ERR,
2232                                        "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2233                         /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2234 #endif
2235                         dprintkdbg(DBG_KG, "data_in_phase0: "
2236                                 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2237                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2238                                 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2239                 }
2240                 /* Now: Check remainig data: The SCSI counters should tell us ... */
2241                 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2242                 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2243                 d_left_counter = sc + ((fc & 0x1f)
2244                        << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2245                            0));
2246                 dprintkdbg(DBG_KG, "data_in_phase0: "
2247                         "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2248                         "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2249                         "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2250                         fc,
2251                         (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2252                         sc,
2253                         fc,
2254                         DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2255                         DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2256                         srb->total_xfer_length, d_left_counter);
2257 #if DC395x_LASTPIO
2258                 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */
2259                 if (d_left_counter
2260                     && srb->total_xfer_length <= DC395x_LASTPIO) {
2261                         size_t left_io = srb->total_xfer_length;
2262
2263                         /*u32 addr = (srb->segment_x[srb->sg_index].address); */
2264                         /*sg_update_list (srb, d_left_counter); */
2265                         dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2266                                    "for remaining %i bytes:",
2267                                 fc & 0x1f,
2268                                 (srb->dcb->sync_period & WIDE_SYNC) ?
2269                                     "words" : "bytes",
2270                                 srb->total_xfer_length);
2271                         if (srb->dcb->sync_period & WIDE_SYNC)
2272                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2273                                               CFG2_WIDEFIFO);
2274                         while (left_io) {
2275                                 unsigned char *virt, *base = NULL;
2276                                 unsigned long flags = 0;
2277                                 size_t len = left_io;
2278                                 size_t offset = srb->request_length - left_io;
2279
2280                                 local_irq_save(flags);
2281                                 /* Assumption: it's inside one page as it's at most 4 bytes and
2282                                    I just assume it's on a 4-byte boundary */
2283                                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2284                                                            srb->sg_count, &offset, &len);
2285                                 virt = base + offset;
2286
2287                                 left_io -= len;
2288
2289                                 while (len) {
2290                                         u8 byte;
2291                                         byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2292                                         *virt++ = byte;
2293
2294                                         if (debug_enabled(DBG_PIO))
2295                                                 printk(" %02x", byte);
2296
2297                                         d_left_counter--;
2298                                         sg_subtract_one(srb);
2299
2300                                         len--;
2301
2302                                         fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2303
2304                                         if (fc == 0x40) {
2305                                                 left_io = 0;
2306                                                 break;
2307                                         }
2308                                 }
2309
2310                                 WARN_ON((fc != 0x40) == !d_left_counter);
2311
2312                                 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2313                                         /* Read the last byte ... */
2314                                         if (srb->total_xfer_length > 0) {
2315                                                 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2316
2317                                                 *virt++ = byte;
2318                                                 srb->total_xfer_length--;
2319                                                 if (debug_enabled(DBG_PIO))
2320                                                         printk(" %02x", byte);
2321                                         }
2322
2323                                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2324                                 }
2325
2326                                 scsi_kunmap_atomic_sg(base);
2327                                 local_irq_restore(flags);
2328                         }
2329                         /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2330                         /*srb->total_xfer_length = 0; */
2331                         if (debug_enabled(DBG_PIO))
2332                                 printk("\n");
2333                 }
2334 #endif                          /* DC395x_LASTPIO */
2335
2336 #if 0
2337                 /*
2338                  * KG: This was in DATAOUT. Does it also belong here?
2339                  * Nobody seems to know what counter and fifo_cnt count exactly ...
2340                  */
2341                 if (!(scsi_status & SCSIXFERDONE)) {
2342                         /*
2343                          * when data transfer from DMA FIFO to SCSI FIFO
2344                          * if there was some data left in SCSI FIFO
2345                          */
2346                         d_left_counter =
2347                             (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2348                                   0x1F);
2349                         if (srb->dcb->sync_period & WIDE_SYNC)
2350                                 d_left_counter <<= 1;
2351                         /*
2352                          * if WIDE scsi SCSI FIFOCNT unit is word !!!
2353                          * so need to *= 2
2354                          * KG: Seems to be correct ...
2355                          */
2356                 }
2357 #endif
2358                 /* KG: This should not be needed any more! */
2359                 if (d_left_counter == 0
2360                     || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2361 #if 0
2362                         int ctr = 6000000;
2363                         u8 TempDMAstatus;
2364                         do {
2365                                 TempDMAstatus =
2366                                     DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2367                         } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2368                         if (!ctr)
2369                                 dprintkl(KERN_ERR,
2370                                        "Deadlock in DataInPhase0 waiting for DMA!!\n");
2371                         srb->total_xfer_length = 0;
2372 #endif
2373                         srb->total_xfer_length = d_left_counter;
2374                 } else {        /* phase changed */
2375                         /*
2376                          * parsing the case:
2377                          * when a transfer not yet complete
2378                          * but be disconnected by target
2379                          * if transfer not yet complete
2380                          * there were some data residue in SCSI FIFO or
2381                          * SCSI transfer counter not empty
2382                          */
2383                         sg_update_list(srb, d_left_counter);
2384                 }
2385         }
2386         /* KG: The target may decide to disconnect: Empty FIFO before! */
2387         if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2388                 cleanup_after_transfer(acb, srb);
2389         }
2390 }
2391
2392
2393 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2394                 u16 *pscsi_status)
2395 {
2396         dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n",
2397                 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2398         data_io_transfer(acb, srb, XFERDATAIN);
2399 }
2400
2401
2402 static void data_io_transfer(struct AdapterCtlBlk *acb,
2403                 struct ScsiReqBlk *srb, u16 io_dir)
2404 {
2405         struct DeviceCtlBlk *dcb = srb->dcb;
2406         u8 bval;
2407         dprintkdbg(DBG_0,
2408                 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2409                 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun,
2410                 ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2411                 srb->total_xfer_length, srb->sg_index, srb->sg_count);
2412         if (srb == acb->tmp_srb)
2413                 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2414         if (srb->sg_index >= srb->sg_count) {
2415                 /* can't happen? out of bounds error */
2416                 return;
2417         }
2418
2419         if (srb->total_xfer_length > DC395x_LASTPIO) {
2420                 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2421                 /*
2422                  * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2423                  * Maybe, even ABORTXFER would be appropriate
2424                  */
2425                 if (dma_status & XFERPENDING) {
2426                         dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2427                                 "Expect trouble!\n");
2428                         dump_register_info(acb, dcb, srb);
2429                         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2430                 }
2431                 /* clear_fifo(acb, "IO"); */
2432                 /*
2433                  * load what physical address of Scatter/Gather list table
2434                  * want to be transfer
2435                  */
2436                 srb->state |= SRB_DATA_XFER;
2437                 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2438                 if (scsi_sg_count(srb->cmd)) {  /* with S/G */
2439                         io_dir |= DMACMD_SG;
2440                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2441                                        srb->sg_bus_addr +
2442                                        sizeof(struct SGentry) *
2443                                        srb->sg_index);
2444                         /* load how many bytes in the sg list table */
2445                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2446                                        ((u32)(srb->sg_count -
2447                                               srb->sg_index) << 3));
2448                 } else {        /* without S/G */
2449                         io_dir &= ~DMACMD_SG;
2450                         DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2451                                        srb->segment_x[0].address);
2452                         DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2453                                        srb->segment_x[0].length);
2454                 }
2455                 /* load total transfer length (24bits) max value 16Mbyte */
2456                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2457                                srb->total_xfer_length);
2458                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2459                 if (io_dir & DMACMD_DIR) {      /* read */
2460                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2461                                       SCMD_DMA_IN);
2462                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2463                 } else {
2464                         DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2465                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2466                                       SCMD_DMA_OUT);
2467                 }
2468
2469         }
2470 #if DC395x_LASTPIO
2471         else if (srb->total_xfer_length > 0) {  /* The last four bytes: Do PIO */
2472                 /*
2473                  * load what physical address of Scatter/Gather list table
2474                  * want to be transfer
2475                  */
2476                 srb->state |= SRB_DATA_XFER;
2477                 /* load total transfer length (24bits) max value 16Mbyte */
2478                 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2479                                srb->total_xfer_length);
2480                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2481                 if (io_dir & DMACMD_DIR) {      /* read */
2482                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2483                                       SCMD_FIFO_IN);
2484                 } else {        /* write */
2485                         int ln = srb->total_xfer_length;
2486                         size_t left_io = srb->total_xfer_length;
2487
2488                         if (srb->dcb->sync_period & WIDE_SYNC)
2489                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2490                                      CFG2_WIDEFIFO);
2491
2492                         while (left_io) {
2493                                 unsigned char *virt, *base = NULL;
2494                                 unsigned long flags = 0;
2495                                 size_t len = left_io;
2496                                 size_t offset = srb->request_length - left_io;
2497
2498                                 local_irq_save(flags);
2499                                 /* Again, max 4 bytes */
2500                                 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2501                                                            srb->sg_count, &offset, &len);
2502                                 virt = base + offset;
2503
2504                                 left_io -= len;
2505
2506                                 while (len--) {
2507                                         if (debug_enabled(DBG_PIO))
2508                                                 printk(" %02x", *virt);
2509
2510                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2511
2512                                         sg_subtract_one(srb);
2513                                 }
2514
2515                                 scsi_kunmap_atomic_sg(base);
2516                                 local_irq_restore(flags);
2517                         }
2518                         if (srb->dcb->sync_period & WIDE_SYNC) {
2519                                 if (ln % 2) {
2520                                         DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2521                                         if (debug_enabled(DBG_PIO))
2522                                                 printk(" |00");
2523                                 }
2524                                 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2525                         }
2526                         /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2527                         if (debug_enabled(DBG_PIO))
2528                                 printk("\n");
2529                         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2530                                           SCMD_FIFO_OUT);
2531                 }
2532         }
2533 #endif                          /* DC395x_LASTPIO */
2534         else {          /* xfer pad */
2535                 u8 data = 0, data2 = 0;
2536                 if (srb->sg_count) {
2537                         srb->adapter_status = H_OVER_UNDER_RUN;
2538                         srb->status |= OVER_RUN;
2539                 }
2540                 /*
2541                  * KG: despite the fact that we are using 16 bits I/O ops
2542                  * the SCSI FIFO is only 8 bits according to the docs
2543                  * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2544                  */
2545                 if (dcb->sync_period & WIDE_SYNC) {
2546                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2547                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2548                                       CFG2_WIDEFIFO);
2549                         if (io_dir & DMACMD_DIR) {
2550                                 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2551                                 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2552                         } else {
2553                                 /* Danger, Robinson: If you find KGs
2554                                  * scattered over the wide disk, the driver
2555                                  * or chip is to blame :-( */
2556                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2557                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2558                         }
2559                         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2560                 } else {
2561                         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2562                         /* Danger, Robinson: If you find a collection of Ks on your disk
2563                          * something broke :-( */
2564                         if (io_dir & DMACMD_DIR)
2565                                 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2566                         else
2567                                 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2568                 }
2569                 srb->state |= SRB_XFERPAD;
2570                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2571                 /* SCSI command */
2572                 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2573                 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2574         }
2575 }
2576
2577
2578 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2579                 u16 *pscsi_status)
2580 {
2581         dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n",
2582                 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2583         srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2584         srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);      /* get message */
2585         srb->state = SRB_COMPLETED;
2586         *pscsi_status = PH_BUS_FREE;    /*.. initial phase */
2587         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2588         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2589 }
2590
2591
2592 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2593                 u16 *pscsi_status)
2594 {
2595         dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n",
2596                 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun);
2597         srb->state = SRB_STATUS;
2598         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2599         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2600 }
2601
2602
2603 /* Check if the message is complete */
2604 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2605 {
2606         if (*msgbuf == EXTENDED_MESSAGE) {
2607                 if (len < 2)
2608                         return 0;
2609                 if (len < msgbuf[1] + 2)
2610                         return 0;
2611         } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)  /* two byte messages */
2612                 if (len < 2)
2613                         return 0;
2614         return 1;
2615 }
2616
2617 /* reject_msg */
2618 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2619                 struct ScsiReqBlk *srb)
2620 {
2621         srb->msgout_buf[0] = MESSAGE_REJECT;
2622         srb->msg_count = 1;
2623         DC395x_ENABLE_MSGOUT;
2624         srb->state &= ~SRB_MSGIN;
2625         srb->state |= SRB_MSGOUT;
2626         dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2627                 srb->msgin_buf[0],
2628                 srb->dcb->target_id, srb->dcb->target_lun);
2629 }
2630
2631
2632 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2633                 struct DeviceCtlBlk *dcb, u8 tag)
2634 {
2635         struct ScsiReqBlk *srb = NULL;
2636         struct ScsiReqBlk *i;
2637         dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n",
2638                    srb->cmd, tag, srb);
2639
2640         if (!(dcb->tag_mask & (1 << tag)))
2641                 dprintkl(KERN_DEBUG,
2642                         "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2643                         dcb->tag_mask, tag);
2644
2645         if (list_empty(&dcb->srb_going_list))
2646                 goto mingx0;
2647         list_for_each_entry(i, &dcb->srb_going_list, list) {
2648                 if (i->tag_number == tag) {
2649                         srb = i;
2650                         break;
2651                 }
2652         }
2653         if (!srb)
2654                 goto mingx0;
2655
2656         dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n",
2657                 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun);
2658         if (dcb->flag & ABORT_DEV_) {
2659                 /*srb->state = SRB_ABORT_SENT; */
2660                 enable_msgout_abort(acb, srb);
2661         }
2662
2663         if (!(srb->state & SRB_DISCONNECT))
2664                 goto mingx0;
2665
2666         memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2667         srb->state |= dcb->active_srb->state;
2668         srb->state |= SRB_DATA_XFER;
2669         dcb->active_srb = srb;
2670         /* How can we make the DORS happy? */
2671         return srb;
2672
2673       mingx0:
2674         srb = acb->tmp_srb;
2675         srb->state = SRB_UNEXPECT_RESEL;
2676         dcb->active_srb = srb;
2677         srb->msgout_buf[0] = MSG_ABORT_TAG;
2678         srb->msg_count = 1;
2679         DC395x_ENABLE_MSGOUT;
2680         dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2681         return srb;
2682 }
2683
2684
2685 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2686                 struct DeviceCtlBlk *dcb)
2687 {
2688         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2689         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2690         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2691         set_xfer_rate(acb, dcb);
2692 }
2693
2694
2695 /* set async transfer mode */
2696 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2697 {
2698         struct DeviceCtlBlk *dcb = srb->dcb;
2699         dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2700                 dcb->target_id, dcb->target_lun);
2701
2702         dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2703         dcb->sync_mode |= SYNC_NEGO_DONE;
2704         /*dcb->sync_period &= 0; */
2705         dcb->sync_offset = 0;
2706         dcb->min_nego_period = 200 >> 2;        /* 200ns <=> 5 MHz */
2707         srb->state &= ~SRB_DO_SYNC_NEGO;
2708         reprogram_regs(acb, dcb);
2709         if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2710             && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2711                 build_wdtr(acb, dcb, srb);
2712                 DC395x_ENABLE_MSGOUT;
2713                 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2714         }
2715 }
2716
2717
2718 /* set sync transfer mode */
2719 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2720 {
2721         struct DeviceCtlBlk *dcb = srb->dcb;
2722         u8 bval;
2723         int fact;
2724         dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2725                 "(%02i.%01i MHz) Offset %i\n",
2726                 dcb->target_id, srb->msgin_buf[3] << 2,
2727                 (250 / srb->msgin_buf[3]),
2728                 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2729                 srb->msgin_buf[4]);
2730
2731         if (srb->msgin_buf[4] > 15)
2732                 srb->msgin_buf[4] = 15;
2733         if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2734                 dcb->sync_offset = 0;
2735         else if (dcb->sync_offset == 0)
2736                 dcb->sync_offset = srb->msgin_buf[4];
2737         if (srb->msgin_buf[4] > dcb->sync_offset)
2738                 srb->msgin_buf[4] = dcb->sync_offset;
2739         else
2740                 dcb->sync_offset = srb->msgin_buf[4];
2741         bval = 0;
2742         while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2743                             || dcb->min_nego_period >
2744                             clock_period[bval]))
2745                 bval++;
2746         if (srb->msgin_buf[3] < clock_period[bval])
2747                 dprintkl(KERN_INFO,
2748                         "msgin_set_sync: Increase sync nego period to %ins\n",
2749                         clock_period[bval] << 2);
2750         srb->msgin_buf[3] = clock_period[bval];
2751         dcb->sync_period &= 0xf0;
2752         dcb->sync_period |= ALT_SYNC | bval;
2753         dcb->min_nego_period = srb->msgin_buf[3];
2754
2755         if (dcb->sync_period & WIDE_SYNC)
2756                 fact = 500;
2757         else
2758                 fact = 250;
2759
2760         dprintkl(KERN_INFO,
2761                 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2762                 dcb->target_id, (fact == 500) ? "Wide16" : "",
2763                 dcb->min_nego_period << 2, dcb->sync_offset,
2764                 (fact / dcb->min_nego_period),
2765                 ((fact % dcb->min_nego_period) * 10 +
2766                 dcb->min_nego_period / 2) / dcb->min_nego_period);
2767
2768         if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2769                 /* Reply with corrected SDTR Message */
2770                 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2771                         srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2772
2773                 memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2774                 srb->msg_count = 5;
2775                 DC395x_ENABLE_MSGOUT;
2776                 dcb->sync_mode |= SYNC_NEGO_DONE;
2777         } else {
2778                 if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2779                     && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2780                         build_wdtr(acb, dcb, srb);
2781                         DC395x_ENABLE_MSGOUT;
2782                         dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2783                 }
2784         }
2785         srb->state &= ~SRB_DO_SYNC_NEGO;
2786         dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2787
2788         reprogram_regs(acb, dcb);
2789 }
2790
2791
2792 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2793                 struct ScsiReqBlk *srb)
2794 {
2795         struct DeviceCtlBlk *dcb = srb->dcb;
2796         dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2797
2798         dcb->sync_period &= ~WIDE_SYNC;
2799         dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2800         dcb->sync_mode |= WIDE_NEGO_DONE;
2801         srb->state &= ~SRB_DO_WIDE_NEGO;
2802         reprogram_regs(acb, dcb);
2803         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2804             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2805                 build_sdtr(acb, dcb, srb);
2806                 DC395x_ENABLE_MSGOUT;
2807                 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2808         }
2809 }
2810
2811 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2812 {
2813         struct DeviceCtlBlk *dcb = srb->dcb;
2814         u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2815                    && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2816         dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2817
2818         if (srb->msgin_buf[3] > wide)
2819                 srb->msgin_buf[3] = wide;
2820         /* Completed */
2821         if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2822                 dprintkl(KERN_DEBUG,
2823                         "msgin_set_wide: Wide nego initiated <%02i>\n",
2824                         dcb->target_id);
2825                 memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2826                 srb->msg_count = 4;
2827                 srb->state |= SRB_DO_WIDE_NEGO;
2828                 DC395x_ENABLE_MSGOUT;
2829         }
2830
2831         dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2832         if (srb->msgin_buf[3] > 0)
2833                 dcb->sync_period |= WIDE_SYNC;
2834         else
2835                 dcb->sync_period &= ~WIDE_SYNC;
2836         srb->state &= ~SRB_DO_WIDE_NEGO;
2837         /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2838         dprintkdbg(DBG_1,
2839                 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2840                 (8 << srb->msgin_buf[3]), dcb->target_id);
2841         reprogram_regs(acb, dcb);
2842         if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2843             && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2844                 build_sdtr(acb, dcb, srb);
2845                 DC395x_ENABLE_MSGOUT;
2846                 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2847         }
2848 }
2849
2850
2851 /*
2852  * extended message codes:
2853  *
2854  *      code    description
2855  *
2856  *      02h     Reserved
2857  *      00h     MODIFY DATA  POINTER
2858  *      01h     SYNCHRONOUS DATA TRANSFER REQUEST
2859  *      03h     WIDE DATA TRANSFER REQUEST
2860  *   04h - 7Fh  Reserved
2861  *   80h - FFh  Vendor specific
2862  */
2863 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2864                 u16 *pscsi_status)
2865 {
2866         struct DeviceCtlBlk *dcb = acb->active_dcb;
2867         dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd);
2868
2869         srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2870         if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2871                 /* Now eval the msg */
2872                 switch (srb->msgin_buf[0]) {
2873                 case DISCONNECT:
2874                         srb->state = SRB_DISCONNECT;
2875                         break;
2876
2877                 case SIMPLE_QUEUE_TAG:
2878                 case HEAD_OF_QUEUE_TAG:
2879                 case ORDERED_QUEUE_TAG:
2880                         srb =
2881                             msgin_qtag(acb, dcb,
2882                                               srb->msgin_buf[1]);
2883                         break;
2884
2885                 case MESSAGE_REJECT:
2886                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2887                                        DO_CLRATN | DO_DATALATCH);
2888                         /* A sync nego message was rejected ! */
2889                         if (srb->state & SRB_DO_SYNC_NEGO) {
2890                                 msgin_set_async(acb, srb);
2891                                 break;
2892                         }
2893                         /* A wide nego message was rejected ! */
2894                         if (srb->state & SRB_DO_WIDE_NEGO) {
2895                                 msgin_set_nowide(acb, srb);
2896                                 break;
2897                         }
2898                         enable_msgout_abort(acb, srb);
2899                         /*srb->state |= SRB_ABORT_SENT */
2900                         break;
2901
2902                 case EXTENDED_MESSAGE:
2903                         /* SDTR */
2904                         if (srb->msgin_buf[1] == 3
2905                             && srb->msgin_buf[2] == EXTENDED_SDTR) {
2906                                 msgin_set_sync(acb, srb);
2907                                 break;
2908                         }
2909                         /* WDTR */
2910                         if (srb->msgin_buf[1] == 2
2911                             && srb->msgin_buf[2] == EXTENDED_WDTR
2912                             && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2913                                 msgin_set_wide(acb, srb);
2914                                 break;
2915                         }
2916                         msgin_reject(acb, srb);
2917                         break;
2918
2919                 case MSG_IGNOREWIDE:
2920                         /* Discard  wide residual */
2921                         dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2922                         break;
2923
2924                 case COMMAND_COMPLETE:
2925                         /* nothing has to be done */
2926                         break;
2927
2928                 case SAVE_POINTERS:
2929                         /*
2930                          * SAVE POINTER may be ignored as we have the struct
2931                          * ScsiReqBlk* associated with the scsi command.
2932                          */
2933                         dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2934                                 "SAVE POINTER rem=%i Ignore\n",
2935                                 srb->cmd, srb->total_xfer_length);
2936                         break;
2937
2938                 case RESTORE_POINTERS:
2939                         dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2940                         break;
2941
2942                 case ABORT:
2943                         dprintkdbg(DBG_0, "msgin_phase0: (0x%p) "
2944                                 "<%02i-%i> ABORT msg\n",
2945                                 srb->cmd, dcb->target_id,
2946                                 dcb->target_lun);
2947                         dcb->flag |= ABORT_DEV_;
2948                         enable_msgout_abort(acb, srb);
2949                         break;
2950
2951                 default:
2952                         /* reject unknown messages */
2953                         if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2954                                 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2955                                 srb->msg_count = 1;
2956                                 srb->msgout_buf[0] = dcb->identify_msg;
2957                                 DC395x_ENABLE_MSGOUT;
2958                                 srb->state |= SRB_MSGOUT;
2959                                 /*break; */
2960                         }
2961                         msgin_reject(acb, srb);
2962                 }
2963
2964                 /* Clear counter and MsgIn state */
2965                 srb->state &= ~SRB_MSGIN;
2966                 acb->msg_len = 0;
2967         }
2968         *pscsi_status = PH_BUS_FREE;
2969         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important ... you know! */
2970         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2971 }
2972
2973
2974 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2975                 u16 *pscsi_status)
2976 {
2977         dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd);
2978         clear_fifo(acb, "msgin_phase1");
2979         DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2980         if (!(srb->state & SRB_MSGIN)) {
2981                 srb->state &= ~SRB_DISCONNECT;
2982                 srb->state |= SRB_MSGIN;
2983         }
2984         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
2985         /* SCSI command */
2986         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2987 }
2988
2989
2990 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2991                 u16 *pscsi_status)
2992 {
2993 }
2994
2995
2996 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2997                 u16 *pscsi_status)
2998 {
2999 }
3000
3001
3002 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3003 {
3004         struct DeviceCtlBlk *i;
3005
3006         /* set all lun device's  period, offset */
3007         if (dcb->identify_msg & 0x07)
3008                 return;
3009
3010         if (acb->scan_devices) {
3011                 current_sync_offset = dcb->sync_offset;
3012                 return;
3013         }
3014
3015         list_for_each_entry(i, &acb->dcb_list, list)
3016                 if (i->target_id == dcb->target_id) {
3017                         i->sync_period = dcb->sync_period;
3018                         i->sync_offset = dcb->sync_offset;
3019                         i->sync_mode = dcb->sync_mode;
3020                         i->min_nego_period = dcb->min_nego_period;
3021                 }
3022 }
3023
3024
3025 static void disconnect(struct AdapterCtlBlk *acb)
3026 {
3027         struct DeviceCtlBlk *dcb = acb->active_dcb;
3028         struct ScsiReqBlk *srb;
3029
3030         if (!dcb) {
3031                 dprintkl(KERN_ERR, "disconnect: No such device\n");
3032                 udelay(500);
3033                 /* Suspend queue for a while */
3034                 acb->scsi_host->last_reset =
3035                     jiffies + HZ / 2 +
3036                     HZ * acb->eeprom.delay_time;
3037                 clear_fifo(acb, "disconnectEx");
3038                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3039                 return;
3040         }
3041         srb = dcb->active_srb;
3042         acb->active_dcb = NULL;
3043         dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd);
3044
3045         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
3046         clear_fifo(acb, "disconnect");
3047         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3048         if (srb->state & SRB_UNEXPECT_RESEL) {
3049                 dprintkl(KERN_ERR,
3050                         "disconnect: Unexpected reselection <%02i-%i>\n",
3051                         dcb->target_id, dcb->target_lun);
3052                 srb->state = 0;
3053                 waiting_process_next(acb);
3054         } else if (srb->state & SRB_ABORT_SENT) {
3055                 dcb->flag &= ~ABORT_DEV_;
3056                 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3057                 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3058                 doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3059                 waiting_process_next(acb);
3060         } else {
3061                 if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3062                     || !(srb->
3063                          state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3064                         /*
3065                          * Selection time out
3066                          * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3067                          */
3068                         /* Unexp. Disc / Sel Timeout */
3069                         if (srb->state != SRB_START_
3070                             && srb->state != SRB_MSGOUT) {
3071                                 srb->state = SRB_READY;
3072                                 dprintkl(KERN_DEBUG,
3073                                         "disconnect: (0x%p) Unexpected\n",
3074                                         srb->cmd);
3075                                 srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3076                                 goto disc1;
3077                         } else {
3078                                 /* Normal selection timeout */
3079                                 dprintkdbg(DBG_KG, "disconnect: (0x%p) "
3080                                         "<%02i-%i> SelTO\n", srb->cmd,
3081                                         dcb->target_id, dcb->target_lun);
3082                                 if (srb->retry_count++ > DC395x_MAX_RETRIES
3083                                     || acb->scan_devices) {
3084                                         srb->target_status =
3085                                             SCSI_STAT_SEL_TIMEOUT;
3086                                         goto disc1;
3087                                 }
3088                                 free_tag(dcb, srb);
3089                                 srb_going_to_waiting_move(dcb, srb);
3090                                 dprintkdbg(DBG_KG,
3091                                         "disconnect: (0x%p) Retry\n",
3092                                         srb->cmd);
3093                                 waiting_set_timer(acb, HZ / 20);
3094                         }
3095                 } else if (srb->state & SRB_DISCONNECT) {
3096                         u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3097                         /*
3098                          * SRB_DISCONNECT (This is what we expect!)
3099                          */
3100                         if (bval & 0x40) {
3101                                 dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3102                                         " 0x%02x: ACK set! Other controllers?\n",
3103                                         bval);
3104                                 /* It could come from another initiator, therefore don't do much ! */
3105                         } else
3106                                 waiting_process_next(acb);
3107                 } else if (srb->state & SRB_COMPLETED) {
3108                       disc1:
3109                         /*
3110                          ** SRB_COMPLETED
3111                          */
3112                         free_tag(dcb, srb);
3113                         dcb->active_srb = NULL;
3114                         srb->state = SRB_FREE;
3115                         srb_done(acb, dcb, srb);
3116                 }
3117         }
3118 }
3119
3120
3121 static void reselect(struct AdapterCtlBlk *acb)
3122 {
3123         struct DeviceCtlBlk *dcb = acb->active_dcb;
3124         struct ScsiReqBlk *srb = NULL;
3125         u16 rsel_tar_lun_id;
3126         u8 id, lun;
3127         u8 arblostflag = 0;
3128         dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3129
3130         clear_fifo(acb, "reselect");
3131         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3132         /* Read Reselected Target ID and LUN */
3133         rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3134         if (dcb) {              /* Arbitration lost but Reselection win */
3135                 srb = dcb->active_srb;
3136                 if (!srb) {
3137                         dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3138                                 "but active_srb == NULL\n");
3139                         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3140                         return;
3141                 }
3142                 /* Why the if ? */
3143                 if (!acb->scan_devices) {
3144                         dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> "
3145                                 "Arb lost but Resel win rsel=%i stat=0x%04x\n",
3146                                 srb->cmd, dcb->target_id,
3147                                 dcb->target_lun, rsel_tar_lun_id,
3148                                 DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3149                         arblostflag = 1;
3150                         /*srb->state |= SRB_DISCONNECT; */
3151
3152                         srb->state = SRB_READY;
3153                         free_tag(dcb, srb);
3154                         srb_going_to_waiting_move(dcb, srb);
3155                         waiting_set_timer(acb, HZ / 20);
3156
3157                         /* return; */
3158                 }
3159         }
3160         /* Read Reselected Target Id and LUN */
3161         if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3162                 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3163                         "Got %i!\n", rsel_tar_lun_id);
3164         id = rsel_tar_lun_id & 0xff;
3165         lun = (rsel_tar_lun_id >> 8) & 7;
3166         dcb = find_dcb(acb, id, lun);
3167         if (!dcb) {
3168                 dprintkl(KERN_ERR, "reselect: From non existent device "
3169                         "<%02i-%i>\n", id, lun);
3170                 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);      /* it's important for atn stop */
3171                 return;
3172         }
3173         acb->active_dcb = dcb;
3174
3175         if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3176                 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3177                         "disconnection? <%02i-%i>\n",
3178                         dcb->target_id, dcb->target_lun);
3179
3180         if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3181                 srb = acb->tmp_srb;
3182                 dcb->active_srb = srb;
3183         } else {
3184                 /* There can be only one! */
3185                 srb = dcb->active_srb;
3186                 if (!srb || !(srb->state & SRB_DISCONNECT)) {
3187                         /*
3188                          * abort command
3189                          */
3190                         dprintkl(KERN_DEBUG,
3191                                 "reselect: w/o disconnected cmds <%02i-%i>\n",
3192                                 dcb->target_id, dcb->target_lun);
3193                         srb = acb->tmp_srb;
3194                         srb->state = SRB_UNEXPECT_RESEL;
3195                         dcb->active_srb = srb;
3196                         enable_msgout_abort(acb, srb);
3197                 } else {
3198                         if (dcb->flag & ABORT_DEV_) {
3199                                 /*srb->state = SRB_ABORT_SENT; */
3200                                 enable_msgout_abort(acb, srb);
3201                         } else
3202                                 srb->state = SRB_DATA_XFER;
3203
3204                 }
3205         }
3206         srb->scsi_phase = PH_BUS_FREE;  /* initial phase */
3207
3208         /* Program HA ID, target ID, period and offset */
3209         dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3210         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);     /* host   ID */
3211         DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);            /* target ID */
3212         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);            /* offset    */
3213         DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);              /* sync period, wide */
3214         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);              /* it's important for atn stop */
3215         /* SCSI command */
3216         DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3217 }
3218
3219
3220 static inline u8 tagq_blacklist(char *name)
3221 {
3222 #ifndef DC395x_NO_TAGQ
3223 #if 0
3224         u8 i;
3225         for (i = 0; i < BADDEVCNT; i++)
3226                 if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3227                         return 1;
3228 #endif
3229         return 0;
3230 #else
3231         return 1;
3232 #endif
3233 }
3234
3235
3236 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3237 {
3238         /* Check for SCSI format (ANSI and Response data format) */
3239         if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3240                 if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3241                     && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3242                     /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3243                     /* ((dcb->dev_type == TYPE_DISK)
3244                        || (dcb->dev_type == TYPE_MOD)) && */
3245                     !tagq_blacklist(((char *)ptr) + 8)) {
3246                         if (dcb->max_command == 1)
3247                                 dcb->max_command =
3248                                     dcb->acb->tag_max_num;
3249                         dcb->sync_mode |= EN_TAG_QUEUEING;
3250                         /*dcb->tag_mask = 0; */
3251                 } else
3252                         dcb->max_command = 1;
3253         }
3254 }
3255
3256
3257 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3258                 struct ScsiInqData *ptr)
3259 {
3260         u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3261         dcb->dev_type = bval1;
3262         /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3263         disc_tagq_set(dcb, ptr);
3264 }
3265
3266
3267 /* unmap mapped pci regions from SRB */
3268 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3269 {
3270         struct scsi_cmnd *cmd = srb->cmd;
3271         enum dma_data_direction dir = cmd->sc_data_direction;
3272
3273         if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3274                 /* unmap DC395x SG list */
3275                 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3276                         srb->sg_bus_addr, SEGMENTX_LEN);
3277                 pci_unmap_single(acb->dev, srb->sg_bus_addr,
3278                                  SEGMENTX_LEN,
3279                                  PCI_DMA_TODEVICE);
3280                 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3281                            scsi_sg_count(cmd), scsi_bufflen(cmd));
3282                 /* unmap the sg segments */
3283                 scsi_dma_unmap(cmd);
3284         }
3285 }
3286
3287
3288 /* unmap mapped pci sense buffer from SRB */
3289 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3290                 struct ScsiReqBlk *srb)
3291 {
3292         if (!(srb->flag & AUTO_REQSENSE))
3293                 return;
3294         /* Unmap sense buffer */
3295         dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3296                srb->segment_x[0].address);
3297         pci_unmap_single(acb->dev, srb->segment_x[0].address,
3298                          srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3299         /* Restore SG stuff */
3300         srb->total_xfer_length = srb->xferred;
3301         srb->segment_x[0].address =
3302             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3303         srb->segment_x[0].length =
3304             srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3305 }
3306
3307
3308 /*
3309  * Complete execution of a SCSI command
3310  * Signal completion to the generic SCSI driver
3311  */
3312 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3313                 struct ScsiReqBlk *srb)
3314 {
3315         u8 tempcnt, status;
3316         struct scsi_cmnd *cmd = srb->cmd;
3317         enum dma_data_direction dir = cmd->sc_data_direction;
3318         int ckc_only = 1;
3319
3320         dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd,
3321                 srb->cmd->device->id, srb->cmd->device->lun);
3322         dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3323                    srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3324                    scsi_sgtalbe(cmd));
3325         status = srb->target_status;
3326         if (srb->flag & AUTO_REQSENSE) {
3327                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3328                 pci_unmap_srb_sense(acb, srb);
3329                 /*
3330                  ** target status..........................
3331                  */
3332                 srb->flag &= ~AUTO_REQSENSE;
3333                 srb->adapter_status = 0;
3334                 srb->target_status = CHECK_CONDITION << 1;
3335                 if (debug_enabled(DBG_1)) {
3336                         switch (cmd->sense_buffer[2] & 0x0f) {
3337                         case NOT_READY:
3338                                 dprintkl(KERN_DEBUG,
3339                                      "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3340                                      cmd->cmnd[0], dcb->target_id,
3341                                      dcb->target_lun, status, acb->scan_devices);
3342                                 break;
3343                         case UNIT_ATTENTION:
3344                                 dprintkl(KERN_DEBUG,
3345                                      "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3346                                      cmd->cmnd[0], dcb->target_id,
3347                                      dcb->target_lun, status, acb->scan_devices);
3348                                 break;
3349                         case ILLEGAL_REQUEST:
3350                                 dprintkl(KERN_DEBUG,
3351                                      "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3352                                      cmd->cmnd[0], dcb->target_id,
3353                                      dcb->target_lun, status, acb->scan_devices);
3354                                 break;
3355                         case MEDIUM_ERROR:
3356                                 dprintkl(KERN_DEBUG,
3357                                      "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3358                                      cmd->cmnd[0], dcb->target_id,
3359                                      dcb->target_lun, status, acb->scan_devices);
3360                                 break;
3361                         case HARDWARE_ERROR:
3362                                 dprintkl(KERN_DEBUG,
3363                                      "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3364                                      cmd->cmnd[0], dcb->target_id,
3365                                      dcb->target_lun, status, acb->scan_devices);
3366                                 break;
3367                         }
3368                         if (cmd->sense_buffer[7] >= 6)
3369                                 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3370                                         "(0x%08x 0x%08x)\n",
3371                                         cmd->sense_buffer[2], cmd->sense_buffer[12],
3372                                         cmd->sense_buffer[13],
3373                                         *((unsigned int *)(cmd->sense_buffer + 3)),
3374                                         *((unsigned int *)(cmd->sense_buffer + 8)));
3375                         else
3376                                 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3377                                         cmd->sense_buffer[2],
3378                                         *((unsigned int *)(cmd->sense_buffer + 3)));
3379                 }
3380
3381                 if (status == (CHECK_CONDITION << 1)) {
3382                         cmd->result = DID_BAD_TARGET << 16;
3383                         goto ckc_e;
3384                 }
3385                 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3386
3387                 if (srb->total_xfer_length
3388                     && srb->total_xfer_length >= cmd->underflow)
3389                         cmd->result =
3390                             MK_RES_LNX(DRIVER_SENSE, DID_OK,
3391                                        srb->end_message, CHECK_CONDITION);
3392                 /*SET_RES_DID(cmd->result,DID_OK) */
3393                 else
3394                         cmd->result =
3395                             MK_RES_LNX(DRIVER_SENSE, DID_OK,
3396                                        srb->end_message, CHECK_CONDITION);
3397
3398                 goto ckc_e;
3399         }
3400
3401 /*************************************************************/
3402         if (status) {
3403                 /*
3404                  * target status..........................
3405                  */
3406                 if (status_byte(status) == CHECK_CONDITION) {
3407                         request_sense(acb, dcb, srb);
3408                         return;
3409                 } else if (status_byte(status) == QUEUE_FULL) {
3410                         tempcnt = (u8)list_size(&dcb->srb_going_list);
3411                         dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3412                              dcb->target_id, dcb->target_lun, tempcnt);
3413                         if (tempcnt > 1)
3414                                 tempcnt--;
3415                         dcb->max_command = tempcnt;
3416                         free_tag(dcb, srb);
3417                         srb_going_to_waiting_move(dcb, srb);
3418                         waiting_set_timer(acb, HZ / 20);
3419                         srb->adapter_status = 0;
3420                         srb->target_status = 0;
3421                         return;
3422                 } else if (status == SCSI_STAT_SEL_TIMEOUT) {
3423                         srb->adapter_status = H_SEL_TIMEOUT;
3424                         srb->target_status = 0;
3425                         cmd->result = DID_NO_CONNECT << 16;
3426                 } else {
3427                         srb->adapter_status = 0;
3428                         SET_RES_DID(cmd->result, DID_ERROR);
3429                         SET_RES_MSG(cmd->result, srb->end_message);
3430                         SET_RES_TARGET(cmd->result, status);
3431
3432                 }
3433         } else {
3434                 /*
3435                  ** process initiator status..........................
3436                  */
3437                 status = srb->adapter_status;
3438                 if (status & H_OVER_UNDER_RUN) {
3439                         srb->target_status = 0;
3440                         SET_RES_DID(cmd->result, DID_OK);
3441                         SET_RES_MSG(cmd->result, srb->end_message);
3442                 } else if (srb->status & PARITY_ERROR) {
3443                         SET_RES_DID(cmd->result, DID_PARITY);
3444                         SET_RES_MSG(cmd->result, srb->end_message);
3445                 } else {        /* No error */
3446
3447                         srb->adapter_status = 0;
3448                         srb->target_status = 0;
3449                         SET_RES_DID(cmd->result, DID_OK);
3450                 }
3451         }
3452
3453         if (dir != PCI_DMA_NONE && scsi_sg_count(cmd))
3454                 pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd),
3455                                         scsi_sg_count(cmd), dir);
3456
3457         ckc_only = 0;
3458 /* Check Error Conditions */
3459       ckc_e:
3460
3461         if (cmd->cmnd[0] == INQUIRY) {
3462                 unsigned char *base = NULL;
3463                 struct ScsiInqData *ptr;
3464                 unsigned long flags = 0;
3465                 struct scatterlist* sg = scsi_sglist(cmd);
3466                 size_t offset = 0, len = sizeof(struct ScsiInqData);
3467
3468                 local_irq_save(flags);
3469                 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3470                 ptr = (struct ScsiInqData *)(base + offset);
3471
3472                 if (!ckc_only && (cmd->result & RES_DID) == 0
3473                     && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3474                     && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3475                         dcb->inquiry7 = ptr->Flags;
3476
3477         /*if( srb->cmd->cmnd[0] == INQUIRY && */
3478         /*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3479                 if ((cmd->result == (DID_OK << 16)
3480                      || status_byte(cmd->result) &
3481                      CHECK_CONDITION)) {
3482                         if (!dcb->init_tcq_flag) {
3483                                 add_dev(acb, dcb, ptr);
3484                                 dcb->init_tcq_flag = 1;
3485                         }
3486                 }
3487
3488                 scsi_kunmap_atomic_sg(base);
3489                 local_irq_restore(flags);
3490         }
3491
3492         /* Here is the info for Doug Gilbert's sg3 ... */
3493         scsi_set_resid(cmd, srb->total_xfer_length);
3494         /* This may be interpreted by sb. or not ... */
3495         cmd->SCp.this_residual = srb->total_xfer_length;
3496         cmd->SCp.buffers_residual = 0;
3497         if (debug_enabled(DBG_KG)) {
3498                 if (srb->total_xfer_length)
3499                         dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> "
3500                                 "cmnd=0x%02x Missed %i bytes\n",
3501                                 cmd, cmd->device->id, cmd->device->lun,
3502                                 cmd->cmnd[0], srb->total_xfer_length);
3503         }
3504
3505         srb_going_remove(dcb, srb);
3506         /* Add to free list */
3507         if (srb == acb->tmp_srb)
3508                 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3509         else {
3510                 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n",
3511                         cmd, cmd->result);
3512                 srb_free_insert(acb, srb);
3513         }
3514         pci_unmap_srb(acb, srb);
3515
3516         cmd->scsi_done(cmd);
3517         waiting_process_next(acb);
3518 }
3519
3520
3521 /* abort all cmds in our queues */
3522 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3523                 struct scsi_cmnd *cmd, u8 force)
3524 {
3525         struct DeviceCtlBlk *dcb;
3526         dprintkl(KERN_INFO, "doing_srb_done: pids ");
3527
3528         list_for_each_entry(dcb, &acb->dcb_list, list) {
3529                 struct ScsiReqBlk *srb;
3530                 struct ScsiReqBlk *tmp;
3531                 struct scsi_cmnd *p;
3532
3533                 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3534                         enum dma_data_direction dir;
3535                         int result;
3536
3537                         p = srb->cmd;
3538                         dir = p->sc_data_direction;
3539                         result = MK_RES(0, did_flag, 0, 0);
3540                         printk("G:%p(%02i-%i) ", p,
3541                                p->device->id, p->device->lun);
3542                         srb_going_remove(dcb, srb);
3543                         free_tag(dcb, srb);
3544                         srb_free_insert(acb, srb);
3545                         p->result = result;
3546                         pci_unmap_srb_sense(acb, srb);
3547                         pci_unmap_srb(acb, srb);
3548                         if (force) {
3549                                 /* For new EH, we normally don't need to give commands back,
3550                                  * as they all complete or all time out */
3551                                 p->scsi_done(p);
3552                         }
3553                 }
3554                 if (!list_empty(&dcb->srb_going_list))
3555                         dprintkl(KERN_DEBUG,
3556                                "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3557                                dcb->target_id, dcb->target_lun);
3558                 if (dcb->tag_mask)
3559                         dprintkl(KERN_DEBUG,
3560                                "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3561                                dcb->target_id, dcb->target_lun,
3562                                dcb->tag_mask);
3563
3564                 /* Waiting queue */
3565                 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3566                         int result;
3567                         p = srb->cmd;
3568
3569                         result = MK_RES(0, did_flag, 0, 0);
3570                         printk("W:%p<%02i-%i>", p, p->device->id,
3571                                p->device->lun);
3572                         srb_waiting_remove(dcb, srb);
3573                         srb_free_insert(acb, srb);
3574                         p->result = result;
3575                         pci_unmap_srb_sense(acb, srb);
3576                         pci_unmap_srb(acb, srb);
3577                         if (force) {
3578                                 /* For new EH, we normally don't need to give commands back,
3579                                  * as they all complete or all time out */
3580                                 cmd->scsi_done(cmd);
3581                         }
3582                 }
3583                 if (!list_empty(&dcb->srb_waiting_list))
3584                         dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3585                              list_size(&dcb->srb_waiting_list), dcb->target_id,
3586                              dcb->target_lun);
3587                 dcb->flag &= ~ABORT_DEV_;
3588         }
3589         printk("\n");
3590 }
3591
3592
3593 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3594 {
3595         dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3596         acb->acb_flag |= RESET_DEV;     /* RESET_DETECT, RESET_DONE, RESET_DEV */
3597         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3598
3599         while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3600                 /* nothing */;
3601 }
3602
3603
3604 static void set_basic_config(struct AdapterCtlBlk *acb)
3605 {
3606         u8 bval;
3607         u16 wval;
3608         DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3609         if (acb->config & HCC_PARITY)
3610                 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3611         else
3612                 bval = PHASELATCH | INITIATOR | BLOCKRST;
3613
3614         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3615
3616         /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3617         DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);       /* was 0x13: default */
3618         /* program Host ID                  */
3619         DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3620         /* set ansynchronous transfer       */
3621         DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3622         /* Turn LED control off */
3623         wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3624         DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3625         /* DMA config          */
3626         wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3627         wval |=
3628             DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3629         DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3630         /* Clear pending interrupt status */
3631         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3632         /* Enable SCSI interrupt    */
3633         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3634         DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3635                       /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3636                       );
3637 }
3638
3639
3640 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3641 {
3642         dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3643         /* delay half a second */
3644         if (timer_pending(&acb->waiting_timer))
3645                 del_timer(&acb->waiting_timer);
3646
3647         DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3648         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3649         /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3650         udelay(500);
3651         /* Maybe we locked up the bus? Then lets wait even longer ... */
3652         acb->scsi_host->last_reset =
3653             jiffies + 5 * HZ / 2 +
3654             HZ * acb->eeprom.delay_time;
3655
3656         clear_fifo(acb, "scsi_reset_detect");
3657         set_basic_config(acb);
3658         /*1.25 */
3659         /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3660
3661         if (acb->acb_flag & RESET_DEV) {        /* RESET_DETECT, RESET_DONE, RESET_DEV */
3662                 acb->acb_flag |= RESET_DONE;
3663         } else {
3664                 acb->acb_flag |= RESET_DETECT;
3665                 reset_dev_param(acb);
3666                 doing_srb_done(acb, DID_RESET, NULL, 1);
3667                 /*DC395x_RecoverSRB( acb ); */
3668                 acb->active_dcb = NULL;
3669                 acb->acb_flag = 0;
3670                 waiting_process_next(acb);
3671         }
3672 }
3673
3674
3675 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3676                 struct ScsiReqBlk *srb)
3677 {
3678         struct scsi_cmnd *cmd = srb->cmd;
3679         dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n",
3680                 cmd, cmd->device->id, cmd->device->lun);
3681
3682         srb->flag |= AUTO_REQSENSE;
3683         srb->adapter_status = 0;
3684         srb->target_status = 0;
3685
3686         /* KG: Can this prevent crap sense data ? */
3687         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3688
3689         /* Save some data */
3690         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3691             srb->segment_x[0].address;
3692         srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3693             srb->segment_x[0].length;
3694         srb->xferred = srb->total_xfer_length;
3695         /* srb->segment_x : a one entry of S/G list table */
3696         srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3697         srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3698         /* Map sense buffer */
3699         srb->segment_x[0].address =
3700             pci_map_single(acb->dev, cmd->sense_buffer,
3701                            SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3702         dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3703                cmd->sense_buffer, srb->segment_x[0].address,
3704                SCSI_SENSE_BUFFERSIZE);
3705         srb->sg_count = 1;
3706         srb->sg_index = 0;
3707
3708         if (start_scsi(acb, dcb, srb)) {        /* Should only happen, if sb. else grabs the bus */
3709                 dprintkl(KERN_DEBUG,
3710                         "request_sense: (0x%p) failed <%02i-%i>\n",
3711                         srb->cmd, dcb->target_id, dcb->target_lun);
3712                 srb_going_to_waiting_move(dcb, srb);
3713                 waiting_set_timer(acb, HZ / 100);
3714         }
3715 }
3716
3717
3718 /**
3719  * device_alloc - Allocate a new device instance. This create the
3720  * devices instance and sets up all the data items. The adapter
3721  * instance is required to obtain confiuration information for this
3722  * device. This does *not* add this device to the adapters device
3723  * list.
3724  *
3725  * @acb: The adapter to obtain configuration information from.
3726  * @target: The target for the new device.
3727  * @lun: The lun for the new device.
3728  *
3729  * Return the new device if successful or NULL on failure.
3730  **/
3731 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3732                 u8 target, u8 lun)
3733 {
3734         struct NvRamType *eeprom = &acb->eeprom;
3735         u8 period_index = eeprom->target[target].period & 0x07;
3736         struct DeviceCtlBlk *dcb;
3737
3738         dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3739         dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3740         if (!dcb)
3741                 return NULL;
3742         dcb->acb = NULL;
3743         INIT_LIST_HEAD(&dcb->srb_going_list);
3744         INIT_LIST_HEAD(&dcb->srb_waiting_list);
3745         dcb->active_srb = NULL;
3746         dcb->tag_mask = 0;
3747         dcb->max_command = 1;
3748         dcb->target_id = target;
3749         dcb->target_lun = lun;
3750         dcb->dev_mode = eeprom->target[target].cfg0;
3751 #ifndef DC395x_NO_DISCONNECT
3752         dcb->identify_msg =
3753             IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3754 #else
3755         dcb->identify_msg = IDENTIFY(0, lun);
3756 #endif
3757         dcb->inquiry7 = 0;
3758         dcb->sync_mode = 0;
3759         dcb->min_nego_period = clock_period[period_index];
3760         dcb->sync_period = 0;
3761         dcb->sync_offset = 0;
3762         dcb->flag = 0;
3763
3764 #ifndef DC395x_NO_WIDE
3765         if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3766             && (acb->config & HCC_WIDE_CARD))
3767                 dcb->sync_mode |= WIDE_NEGO_ENABLE;
3768 #endif
3769 #ifndef DC395x_NO_SYNC
3770         if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3771                 if (!(lun) || current_sync_offset)
3772                         dcb->sync_mode |= SYNC_NEGO_ENABLE;
3773 #endif
3774         if (dcb->target_lun != 0) {
3775                 /* Copy settings */
3776                 struct DeviceCtlBlk *p;
3777                 list_for_each_entry(p, &acb->dcb_list, list)
3778                         if (p->target_id == dcb->target_id)
3779                                 break;
3780                 dprintkdbg(DBG_1,
3781                        "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3782                        dcb->target_id, dcb->target_lun,
3783                        p->target_id, p->target_lun);
3784                 dcb->sync_mode = p->sync_mode;
3785                 dcb->sync_period = p->sync_period;
3786                 dcb->min_nego_period = p->min_nego_period;
3787                 dcb->sync_offset = p->sync_offset;
3788                 dcb->inquiry7 = p->inquiry7;
3789         }
3790         return dcb;
3791 }
3792
3793
3794 /**
3795  * adapter_add_device - Adds the device instance to the adaptor instance.
3796  *
3797  * @acb: The adapter device to be updated
3798  * @dcb: A newly created and initialised device instance to add.
3799  **/
3800 static void adapter_add_device(struct AdapterCtlBlk *acb,
3801                 struct DeviceCtlBlk *dcb)
3802 {
3803         /* backpointer to adapter */
3804         dcb->acb = acb;
3805
3806         /* set run_robin to this device if it is currently empty */
3807         if (list_empty(&acb->dcb_list))
3808                 acb->dcb_run_robin = dcb;
3809
3810         /* add device to list */
3811         list_add_tail(&dcb->list, &acb->dcb_list);
3812
3813         /* update device maps */
3814         acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3815         acb->children[dcb->target_id][dcb->target_lun] = dcb;
3816 }
3817
3818
3819 /**
3820  * adapter_remove_device - Removes the device instance from the adaptor
3821  * instance. The device instance is not check in any way or freed by this.
3822  * The caller is expected to take care of that. This will simply remove the
3823  * device from the adapters data strcutures.
3824  *
3825  * @acb: The adapter device to be updated
3826  * @dcb: A device that has previously been added to the adapter.
3827  **/
3828 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3829                 struct DeviceCtlBlk *dcb)
3830 {
3831         struct DeviceCtlBlk *i;
3832         struct DeviceCtlBlk *tmp;
3833         dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3834                 dcb->target_id, dcb->target_lun);
3835
3836         /* fix up any pointers to this device that we have in the adapter */
3837         if (acb->active_dcb == dcb)
3838                 acb->active_dcb = NULL;
3839         if (acb->dcb_run_robin == dcb)
3840                 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3841
3842         /* unlink from list */
3843         list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3844                 if (dcb == i) {
3845                         list_del(&i->list);
3846                         break;
3847                 }
3848
3849         /* clear map and children */
3850         acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3851         acb->children[dcb->target_id][dcb->target_lun] = NULL;
3852         dcb->acb = NULL;
3853 }
3854
3855
3856 /**
3857  * adapter_remove_and_free_device - Removes a single device from the adapter
3858  * and then frees the device information.
3859  *
3860  * @acb: The adapter device to be updated
3861  * @dcb: A device that has previously been added to the adapter.
3862  */
3863 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3864                 struct DeviceCtlBlk *dcb)
3865 {
3866         if (list_size(&dcb->srb_going_list) > 1) {
3867                 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3868                            "Won't remove because of %i active requests.\n",
3869                            dcb->target_id, dcb->target_lun,
3870                            list_size(&dcb->srb_going_list));
3871                 return;
3872         }
3873         adapter_remove_device(acb, dcb);
3874         kfree(dcb);
3875 }
3876
3877
3878 /**
3879  * adapter_remove_and_free_all_devices - Removes and frees all of the
3880  * devices associated with the specified adapter.
3881  *
3882  * @acb: The adapter from which all devices should be removed.
3883  **/
3884 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3885 {
3886         struct DeviceCtlBlk *dcb;
3887         struct DeviceCtlBlk *tmp;
3888         dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3889                    list_size(&acb->dcb_list));
3890
3891         list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3892                 adapter_remove_and_free_device(acb, dcb);
3893 }
3894
3895
3896 /**
3897  * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3898  * scsi device that we need to deal with. We allocate a new device and then
3899  * insert that device into the adapters device list.
3900  *
3901  * @scsi_device: The new scsi device that we need to handle.
3902  **/
3903 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3904 {
3905         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3906         struct DeviceCtlBlk *dcb;
3907
3908         dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3909         if (!dcb)
3910                 return -ENOMEM;
3911         adapter_add_device(acb, dcb);
3912
3913         return 0;
3914 }
3915
3916
3917 /**
3918  * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3919  * device that is going away.
3920  *
3921  * @scsi_device: The new scsi device that we need to handle.
3922  **/
3923 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3924 {
3925         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3926         struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3927         if (dcb)
3928                 adapter_remove_and_free_device(acb, dcb);
3929 }
3930
3931
3932
3933
3934 /**
3935  * trms1040_wait_30us: wait for 30 us
3936  *
3937  * Waits for 30us (using the chip by the looks of it..)
3938  *
3939  * @io_port: base I/O address
3940  **/
3941 static void __devinit trms1040_wait_30us(unsigned long io_port)
3942 {
3943         /* ScsiPortStallExecution(30); wait 30 us */
3944         outb(5, io_port + TRM_S1040_GEN_TIMER);
3945         while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3946                 /* nothing */ ;
3947 }
3948
3949
3950 /**
3951  * trms1040_write_cmd - write the secified command and address to
3952  * chip
3953  *
3954  * @io_port:    base I/O address
3955  * @cmd:        SB + op code (command) to send
3956  * @addr:       address to send
3957  **/
3958 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3959 {
3960         int i;
3961         u8 send_data;
3962
3963         /* program SB + OP code */
3964         for (i = 0; i < 3; i++, cmd <<= 1) {
3965                 send_data = NVR_SELECT;
3966                 if (cmd & 0x04) /* Start from bit 2 */
3967                         send_data |= NVR_BITOUT;
3968
3969                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3970                 trms1040_wait_30us(io_port);
3971                 outb((send_data | NVR_CLOCK),
3972                      io_port + TRM_S1040_GEN_NVRAM);
3973                 trms1040_wait_30us(io_port);
3974         }
3975
3976         /* send address */
3977         for (i = 0; i < 7; i++, addr <<= 1) {
3978                 send_data = NVR_SELECT;
3979                 if (addr & 0x40)        /* Start from bit 6 */
3980                         send_data |= NVR_BITOUT;
3981
3982                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3983                 trms1040_wait_30us(io_port);
3984                 outb((send_data | NVR_CLOCK),
3985                      io_port + TRM_S1040_GEN_NVRAM);
3986                 trms1040_wait_30us(io_port);
3987         }
3988         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3989         trms1040_wait_30us(io_port);
3990 }
3991
3992
3993 /**
3994  * trms1040_set_data - store a single byte in the eeprom
3995  *
3996  * Called from write all to write a single byte into the SSEEPROM
3997  * Which is done one bit at a time.
3998  *
3999  * @io_port:    base I/O address
4000  * @addr:       offset into EEPROM
4001  * @byte:       bytes to write
4002  **/
4003 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4004 {
4005         int i;
4006         u8 send_data;
4007
4008         /* Send write command & address */
4009         trms1040_write_cmd(io_port, 0x05, addr);
4010
4011         /* Write data */
4012         for (i = 0; i < 8; i++, byte <<= 1) {
4013                 send_data = NVR_SELECT;
4014                 if (byte & 0x80)        /* Start from bit 7 */
4015                         send_data |= NVR_BITOUT;
4016
4017                 outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4018                 trms1040_wait_30us(io_port);
4019                 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4020                 trms1040_wait_30us(io_port);
4021         }
4022         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4023         trms1040_wait_30us(io_port);
4024
4025         /* Disable chip select */
4026         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4027         trms1040_wait_30us(io_port);
4028
4029         outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4030         trms1040_wait_30us(io_port);
4031
4032         /* Wait for write ready */
4033         while (1) {
4034                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4035                 trms1040_wait_30us(io_port);
4036
4037                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4038                 trms1040_wait_30us(io_port);
4039
4040                 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4041                         break;
4042         }
4043
4044         /*  Disable chip select */
4045         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4046 }
4047
4048
4049 /**
4050  * trms1040_write_all - write 128 bytes to the eeprom
4051  *
4052  * Write the supplied 128 bytes to the chips SEEPROM
4053  *
4054  * @eeprom:     the data to write
4055  * @io_port:    the base io port
4056  **/
4057 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4058 {
4059         u8 *b_eeprom = (u8 *)eeprom;
4060         u8 addr;
4061
4062         /* Enable SEEPROM */
4063         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4064              io_port + TRM_S1040_GEN_CONTROL);
4065
4066         /* write enable */
4067         trms1040_write_cmd(io_port, 0x04, 0xFF);
4068         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4069         trms1040_wait_30us(io_port);
4070
4071         /* write */
4072         for (addr = 0; addr < 128; addr++, b_eeprom++)
4073                 trms1040_set_data(io_port, addr, *b_eeprom);
4074
4075         /* write disable */
4076         trms1040_write_cmd(io_port, 0x04, 0x00);
4077         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4078         trms1040_wait_30us(io_port);
4079
4080         /* Disable SEEPROM */
4081         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4082              io_port + TRM_S1040_GEN_CONTROL);
4083 }
4084
4085
4086 /**
4087  * trms1040_get_data - get a single byte from the eeprom
4088  *
4089  * Called from read all to read a single byte into the SSEEPROM
4090  * Which is done one bit at a time.
4091  *
4092  * @io_port:    base I/O address
4093  * @addr:       offset into SEEPROM
4094  *
4095  * Returns the byte read.
4096  **/
4097 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4098 {
4099         int i;
4100         u8 read_byte;
4101         u8 result = 0;
4102
4103         /* Send read command & address */
4104         trms1040_write_cmd(io_port, 0x06, addr);
4105
4106         /* read data */
4107         for (i = 0; i < 8; i++) {
4108                 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4109                 trms1040_wait_30us(io_port);
4110                 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4111
4112                 /* Get data bit while falling edge */
4113                 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4114                 result <<= 1;
4115                 if (read_byte & NVR_BITIN)
4116                         result |= 1;
4117
4118                 trms1040_wait_30us(io_port);
4119         }
4120
4121         /* Disable chip select */
4122         outb(0, io_port + TRM_S1040_GEN_NVRAM);
4123         return result;
4124 }
4125
4126
4127 /**
4128  * trms1040_read_all - read all bytes from the eeprom
4129  *
4130  * Read the 128 bytes from the SEEPROM.
4131  *
4132  * @eeprom:     where to store the data
4133  * @io_port:    the base io port
4134  **/
4135 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4136 {
4137         u8 *b_eeprom = (u8 *)eeprom;
4138         u8 addr;
4139
4140         /* Enable SEEPROM */
4141         outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4142              io_port + TRM_S1040_GEN_CONTROL);
4143
4144         /* read details */
4145         for (addr = 0; addr < 128; addr++, b_eeprom++)
4146                 *b_eeprom = trms1040_get_data(io_port, addr);
4147
4148         /* Disable SEEPROM */
4149         outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4150              io_port + TRM_S1040_GEN_CONTROL);
4151 }
4152
4153
4154
4155 /**
4156  * check_eeprom - get and check contents of the eeprom
4157  *
4158  * Read seeprom 128 bytes into the memory provider in eeprom.
4159  * Checks the checksum and if it's not correct it uses a set of default
4160  * values.
4161  *
4162  * @eeprom:     caller allocated strcuture to read the eeprom data into
4163  * @io_port:    io port to read from
4164  **/
4165 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4166 {
4167         u16 *w_eeprom = (u16 *)eeprom;
4168         u16 w_addr;
4169         u16 cksum;
4170         u32 d_addr;
4171         u32 *d_eeprom;
4172
4173         trms1040_read_all(eeprom, io_port);     /* read eeprom */
4174
4175         cksum = 0;
4176         for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4177              w_addr++, w_eeprom++)
4178                 cksum += *w_eeprom;
4179         if (cksum != 0x1234) {
4180                 /*
4181                  * Checksum is wrong.
4182                  * Load a set of defaults into the eeprom buffer
4183                  */
4184                 dprintkl(KERN_WARNING,
4185                         "EEProm checksum error: using default values and options.\n");
4186                 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4187                 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4188                 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4189                 eeprom->sub_sys_id[1] =
4190                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4191                 eeprom->sub_class = 0x00;
4192                 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4193                 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4194                 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4195                 eeprom->device_id[1] =
4196                     (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4197                 eeprom->reserved = 0x00;
4198
4199                 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4200                      d_addr < 16; d_addr++, d_eeprom++)
4201                         *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
4202
4203                 *d_eeprom++ = 0x04000F07;       /* max_tag,delay_time,channel_cfg,scsi_id */
4204                 *d_eeprom++ = 0x00000015;       /* reserved1,boot_lun,boot_target,reserved0 */
4205                 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4206                         *d_eeprom = 0x00;
4207
4208                 /* Now load defaults (maybe set by boot/module params) */
4209                 set_safe_settings();
4210                 fix_settings();
4211                 eeprom_override(eeprom);
4212
4213                 eeprom->cksum = 0x00;
4214                 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4215                      w_addr < 63; w_addr++, w_eeprom++)
4216                         cksum += *w_eeprom;
4217
4218                 *w_eeprom = 0x1234 - cksum;
4219                 trms1040_write_all(eeprom, io_port);
4220                 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4221         } else {
4222                 set_safe_settings();
4223                 eeprom_index_to_delay(eeprom);
4224                 eeprom_override(eeprom);
4225         }
4226 }
4227
4228
4229 /**
4230  * print_eeprom_settings - output the eeprom settings
4231  * to the kernel log so people can see what they were.
4232  *
4233  * @eeprom: The eeprom data strucutre to show details for.
4234  **/
4235 static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4236 {
4237         dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4238                 eeprom->scsi_id,
4239                 eeprom->target[0].period,
4240                 clock_speed[eeprom->target[0].period] / 10,
4241                 clock_speed[eeprom->target[0].period] % 10,
4242                 eeprom->target[0].cfg0);
4243         dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4244                 eeprom->channel_cfg, eeprom->max_tag,
4245                 1 << eeprom->max_tag, eeprom->delay_time);
4246 }
4247
4248
4249 /* Free SG tables */
4250 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4251 {
4252         int i;
4253         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4254
4255         for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4256                 kfree(acb->srb_array[i].segment_x);
4257 }
4258
4259
4260 /*
4261  * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4262  * should never cross a page boundary */
4263 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4264 {
4265         const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4266                                     *SEGMENTX_LEN;
4267         int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4268         const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4269         int srb_idx = 0;
4270         unsigned i = 0;
4271         struct SGentry *uninitialized_var(ptr);
4272
4273         for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4274                 acb->srb_array[i].segment_x = NULL;
4275
4276         dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4277         while (pages--) {
4278                 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4279                 if (!ptr) {
4280                         adapter_sg_tables_free(acb);
4281                         return 1;
4282                 }
4283                 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4284                         PAGE_SIZE, ptr, srb_idx);
4285                 i = 0;
4286                 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4287                         acb->srb_array[srb_idx++].segment_x =
4288                             ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4289         }
4290         if (i < srbs_per_page)
4291                 acb->srb.segment_x =
4292                     ptr + (i * DC395x_MAX_SG_LISTENTRY);
4293         else
4294                 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4295         return 0;
4296 }
4297
4298
4299
4300 /**
4301  * adapter_print_config - print adapter connection and termination
4302  * config
4303  *
4304  * The io port in the adapter needs to have been set before calling
4305  * this function.
4306  *
4307  * @acb: The adapter to print the information for.
4308  **/
4309 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4310 {
4311         u8 bval;
4312
4313         bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4314         dprintkl(KERN_INFO, "%sConnectors: ",
4315                 ((bval & WIDESCSI) ? "(Wide) " : ""));
4316         if (!(bval & CON5068))
4317                 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4318         if (!(bval & CON68))
4319                 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4320         if (!(bval & CON50))
4321                 printk("int50 ");
4322         if ((bval & (CON5068 | CON50 | CON68)) ==
4323             0 /*(CON5068 | CON50 | CON68) */ )
4324                 printk(" Oops! (All 3?) ");
4325         bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4326         printk(" Termination: ");
4327         if (bval & DIS_TERM)
4328                 printk("Disabled\n");
4329         else {
4330                 if (bval & AUTOTERM)
4331                         printk("Auto ");
4332                 if (bval & LOW8TERM)
4333                         printk("Low ");
4334                 if (bval & UP8TERM)
4335                         printk("High ");
4336                 printk("\n");
4337         }
4338 }
4339
4340
4341 /**
4342  * adapter_init_params - Initialize the various parameters in the
4343  * adapter structure. Note that the pointer to the scsi_host is set
4344  * early (when this instance is created) and the io_port and irq
4345  * values are set later after they have been reserved. This just gets
4346  * everything set to a good starting position.
4347  *
4348  * The eeprom structure in the adapter needs to have been set before
4349  * calling this function.
4350  *
4351  * @acb: The adapter to initialize.
4352  **/
4353 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4354 {
4355         struct NvRamType *eeprom = &acb->eeprom;
4356         int i;
4357
4358         /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4359         /* NOTE: acb->io_port_base is set at port registration time */
4360         /* NOTE: acb->io_port_len is set at port registration time */
4361
4362         INIT_LIST_HEAD(&acb->dcb_list);
4363         acb->dcb_run_robin = NULL;
4364         acb->active_dcb = NULL;
4365
4366         INIT_LIST_HEAD(&acb->srb_free_list);
4367         /*  temp SRB for Q tag used or abort command used  */
4368         acb->tmp_srb = &acb->srb;
4369         init_timer(&acb->waiting_timer);
4370         init_timer(&acb->selto_timer);
4371
4372         acb->srb_count = DC395x_MAX_SRB_CNT;
4373
4374         acb->sel_timeout = DC395x_SEL_TIMEOUT;  /* timeout=250ms */
4375         /* NOTE: acb->irq_level is set at IRQ registration time */
4376
4377         acb->tag_max_num = 1 << eeprom->max_tag;
4378         if (acb->tag_max_num > 30)
4379                 acb->tag_max_num = 30;
4380
4381         acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE, RESET_DEV */
4382         acb->gmode2 = eeprom->channel_cfg;
4383         acb->config = 0;        /* NOTE: actually set in adapter_init_chip */
4384
4385         if (eeprom->channel_cfg & NAC_SCANLUN)
4386                 acb->lun_chk = 1;
4387         acb->scan_devices = 1;
4388
4389         acb->scsi_host->this_id = eeprom->scsi_id;
4390         acb->hostid_bit = (1 << acb->scsi_host->this_id);
4391
4392         for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4393                 acb->dcb_map[i] = 0;
4394
4395         acb->msg_len = 0;
4396
4397         /* link static array of srbs into the srb free list */
4398         for (i = 0; i < acb->srb_count - 1; i++)
4399                 srb_free_insert(acb, &acb->srb_array[i]);
4400 }
4401
4402
4403 /**
4404  * adapter_init_host - Initialize the scsi host instance based on
4405  * values that we have already stored in the adapter instance. There's
4406  * some mention that a lot of these are deprecated, so we won't use
4407  * them (we'll use the ones in the adapter instance) but we'll fill
4408  * them in in case something else needs them.
4409  *
4410  * The eeprom structure, irq and io ports in the adapter need to have
4411  * been set before calling this function.
4412  *
4413  * @host: The scsi host instance to fill in the values for.
4414  **/
4415 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4416 {
4417         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4418         struct NvRamType *eeprom = &acb->eeprom;
4419
4420         host->max_cmd_len = 24;
4421         host->can_queue = DC395x_MAX_CMD_QUEUE;
4422         host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4423         host->this_id = (int)eeprom->scsi_id;
4424         host->io_port = acb->io_port_base;
4425         host->n_io_port = acb->io_port_len;
4426         host->dma_channel = -1;
4427         host->unique_id = acb->io_port_base;
4428         host->irq = acb->irq_level;
4429         host->last_reset = jiffies;
4430
4431         host->max_id = 16;
4432         if (host->max_id - 1 == eeprom->scsi_id)
4433                 host->max_id--;
4434
4435 #ifdef CONFIG_SCSI_MULTI_LUN
4436         if (eeprom->channel_cfg & NAC_SCANLUN)
4437                 host->max_lun = 8;
4438         else
4439                 host->max_lun = 1;
4440 #else
4441         host->max_lun = 1;
4442 #endif
4443
4444 }
4445
4446
4447 /**
4448  * adapter_init_chip - Get the chip into a know state and figure out
4449  * some of the settings that apply to this adapter.
4450  *
4451  * The io port in the adapter needs to have been set before calling
4452  * this function. The config will be configured correctly on return.
4453  *
4454  * @acb: The adapter which we are to init.
4455  **/
4456 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4457 {
4458         struct NvRamType *eeprom = &acb->eeprom;
4459
4460         /* Mask all the interrupt */
4461         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4462         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4463
4464         /* Reset SCSI module */
4465         DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4466
4467         /* Reset PCI/DMA module */
4468         DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4469         udelay(20);
4470
4471         /* program configuration 0 */
4472         acb->config = HCC_AUTOTERM | HCC_PARITY;
4473         if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4474                 acb->config |= HCC_WIDE_CARD;
4475
4476         if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4477                 acb->config |= HCC_SCSI_RESET;
4478
4479         if (acb->config & HCC_SCSI_RESET) {
4480                 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4481                 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4482
4483                 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4484                 /*spin_unlock_irq (&io_request_lock); */
4485                 udelay(500);
4486
4487                 acb->scsi_host->last_reset =
4488                     jiffies + HZ / 2 +
4489                     HZ * acb->eeprom.delay_time;
4490
4491                 /*spin_lock_irq (&io_request_lock); */
4492         }
4493 }
4494
4495
4496 /**
4497  * init_adapter - Grab the resource for the card, setup the adapter
4498  * information, set the card into a known state, create the various
4499  * tables etc etc. This basically gets all adapter information all up
4500  * to date, initialised and gets the chip in sync with it.
4501  *
4502  * @host:       This hosts adapter structure
4503  * @io_port:    The base I/O port
4504  * @irq:        IRQ
4505  *
4506  * Returns 0 if the initialization succeeds, any other value on
4507  * failure.
4508  **/
4509 static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4510         unsigned long io_port, u32 io_port_len, unsigned int irq)
4511 {
4512         if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4513                 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4514                 goto failed;
4515         }
4516         /* store port base to indicate we have registered it */
4517         acb->io_port_base = io_port;
4518         acb->io_port_len = io_port_len;
4519
4520         if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4521                 /* release the region we just claimed */
4522                 dprintkl(KERN_INFO, "Failed to register IRQ\n");
4523                 goto failed;
4524         }
4525         /* store irq to indicate we have registered it */
4526         acb->irq_level = irq;
4527
4528         /* get eeprom configuration information and command line settings etc */
4529         check_eeprom(&acb->eeprom, io_port);
4530         print_eeprom_settings(&acb->eeprom);
4531
4532         /* setup adapter control block */
4533         adapter_init_params(acb);
4534
4535         /* display card connectors/termination settings */
4536         adapter_print_config(acb);
4537
4538         if (adapter_sg_tables_alloc(acb)) {
4539                 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4540                 goto failed;
4541         }
4542         adapter_init_scsi_host(acb->scsi_host);
4543         adapter_init_chip(acb);
4544         set_basic_config(acb);
4545
4546         dprintkdbg(DBG_0,
4547                 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4548                 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4549                 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4550                 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4551         return 0;
4552
4553 failed:
4554         if (acb->irq_level)
4555                 free_irq(acb->irq_level, acb);
4556         if (acb->io_port_base)
4557                 release_region(acb->io_port_base, acb->io_port_len);
4558         adapter_sg_tables_free(acb);
4559
4560         return 1;
4561 }
4562
4563
4564 /**
4565  * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4566  * stopping all operations and disabling interrupt generation on the
4567  * card.
4568  *
4569  * @acb: The adapter which we are to shutdown.
4570  **/
4571 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4572 {
4573         /* disable interrupts */
4574         DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4575         DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4576
4577         /* reset the scsi bus */
4578         if (acb->config & HCC_SCSI_RESET)
4579                 reset_scsi_bus(acb);
4580
4581         /* clear any pending interrupt state */
4582         DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4583 }
4584
4585
4586
4587 /**
4588  * adapter_uninit - Shut down the chip and release any resources that
4589  * we had allocated. Once this returns the adapter should not be used
4590  * anymore.
4591  *
4592  * @acb: The adapter which we are to un-initialize.
4593  **/
4594 static void adapter_uninit(struct AdapterCtlBlk *acb)
4595 {
4596         unsigned long flags;
4597         DC395x_LOCK_IO(acb->scsi_host, flags);
4598
4599         /* remove timers */
4600         if (timer_pending(&acb->waiting_timer))
4601                 del_timer(&acb->waiting_timer);
4602         if (timer_pending(&acb->selto_timer))
4603                 del_timer(&acb->selto_timer);
4604
4605         adapter_uninit_chip(acb);
4606         adapter_remove_and_free_all_devices(acb);
4607         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4608
4609         if (acb->irq_level)
4610                 free_irq(acb->irq_level, acb);
4611         if (acb->io_port_base)
4612                 release_region(acb->io_port_base, acb->io_port_len);
4613
4614         adapter_sg_tables_free(acb);
4615 }
4616
4617
4618 #undef SPRINTF
4619 #define SPRINTF(args...) pos += sprintf(pos, args)
4620
4621 #undef YESNO
4622 #define YESNO(YN) \
4623  if (YN) SPRINTF(" Yes ");\
4624  else SPRINTF(" No  ")
4625
4626 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4627                 char **start, off_t offset, int length, int inout)
4628 {
4629         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4630         int spd, spd1;
4631         char *pos = buffer;
4632         struct DeviceCtlBlk *dcb;
4633         unsigned long flags;
4634         int dev;
4635
4636         if (inout)              /* Has data been written to the file ? */
4637                 return -EPERM;
4638
4639         SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4640         SPRINTF(" Driver Version " DC395X_VERSION "\n");
4641
4642         DC395x_LOCK_IO(acb->scsi_host, flags);
4643
4644         SPRINTF("SCSI Host Nr %i, ", host->host_no);
4645         SPRINTF("DC395U/UW/F DC315/U %s\n",
4646                 (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4647         SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4648         SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4649         SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4650
4651         SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4652         SPRINTF("AdapterID %i\n", host->this_id);
4653
4654         SPRINTF("tag_max_num %i", acb->tag_max_num);
4655         /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4656         SPRINTF(", FilterCfg 0x%02x",
4657                 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4658         SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4659         /*SPRINTF("\n"); */
4660
4661         SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4662         SPRINTF
4663             ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4664              acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4665              acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4666              acb->dcb_map[6], acb->dcb_map[7]);
4667         SPRINTF
4668             ("                      %02x %02x %02x %02x %02x %02x %02x %02x\n",
4669              acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4670              acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4671              acb->dcb_map[14], acb->dcb_map[15]);
4672
4673         SPRINTF
4674             ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4675
4676         dev = 0;
4677         list_for_each_entry(dcb, &acb->dcb_list, list) {
4678                 int nego_period;
4679                 SPRINTF("%02i %02i  %02i ", dev, dcb->target_id,
4680                         dcb->target_lun);
4681                 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4682                 YESNO(dcb->sync_offset);
4683                 YESNO(dcb->sync_period & WIDE_SYNC);
4684                 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4685                 YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4686                 YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4687                 nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4688                 if (dcb->sync_offset)
4689                         SPRINTF("  %03i ns ", nego_period);
4690                 else
4691                         SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4692
4693                 if (dcb->sync_offset & 0x0f) {
4694                         spd = 1000 / (nego_period);
4695                         spd1 = 1000 % (nego_period);
4696                         spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4697                         SPRINTF("   %2i.%1i M     %02i ", spd, spd1,
4698                                 (dcb->sync_offset & 0x0f));
4699                 } else
4700                         SPRINTF("                 ");
4701
4702                 /* Add more info ... */
4703                 SPRINTF("     %02i\n", dcb->max_command);
4704                 dev++;
4705         }
4706
4707         if (timer_pending(&acb->waiting_timer))
4708                 SPRINTF("Waiting queue timer running\n");
4709         else
4710                 SPRINTF("\n");
4711
4712         list_for_each_entry(dcb, &acb->dcb_list, list) {
4713                 struct ScsiReqBlk *srb;
4714                 if (!list_empty(&dcb->srb_waiting_list))
4715                         SPRINTF("DCB (%02i-%i): Waiting: %i:",
4716                                 dcb->target_id, dcb->target_lun,
4717                                 list_size(&dcb->srb_waiting_list));
4718                 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4719                         SPRINTF(" %p", srb->cmd);
4720                 if (!list_empty(&dcb->srb_going_list))
4721                         SPRINTF("\nDCB (%02i-%i): Going  : %i:",
4722                                 dcb->target_id, dcb->target_lun,
4723                                 list_size(&dcb->srb_going_list));
4724                 list_for_each_entry(srb, &dcb->srb_going_list, list)
4725                         SPRINTF(" %p", srb->cmd);
4726                 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4727                         SPRINTF("\n");
4728         }
4729
4730         if (debug_enabled(DBG_1)) {
4731                 SPRINTF("DCB list for ACB %p:\n", acb);
4732                 list_for_each_entry(dcb, &acb->dcb_list, list) {
4733                         SPRINTF("%p -> ", dcb);
4734                 }
4735                 SPRINTF("END\n");
4736         }
4737
4738         *start = buffer + offset;
4739         DC395x_UNLOCK_IO(acb->scsi_host, flags);
4740
4741         if (pos - buffer < offset)
4742                 return 0;
4743         else if (pos - buffer - offset < length)
4744                 return pos - buffer - offset;
4745         else
4746                 return length;
4747 }
4748
4749
4750 static struct scsi_host_template dc395x_driver_template = {
4751         .module                 = THIS_MODULE,
4752         .proc_name              = DC395X_NAME,
4753         .proc_info              = dc395x_proc_info,
4754         .name                   = DC395X_BANNER " " DC395X_VERSION,
4755         .queuecommand           = dc395x_queue_command,
4756         .bios_param             = dc395x_bios_param,
4757         .slave_alloc            = dc395x_slave_alloc,
4758         .slave_destroy          = dc395x_slave_destroy,
4759         .can_queue              = DC395x_MAX_CAN_QUEUE,
4760         .this_id                = 7,
4761         .sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4762         .cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4763         .eh_abort_handler       = dc395x_eh_abort,
4764         .eh_bus_reset_handler   = dc395x_eh_bus_reset,
4765         .use_clustering         = DISABLE_CLUSTERING,
4766 };
4767
4768
4769 /**
4770  * banner_display - Display banner on first instance of driver
4771  * initialized.
4772  **/
4773 static void banner_display(void)
4774 {
4775         static int banner_done = 0;
4776         if (!banner_done)
4777         {
4778                 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4779                 banner_done = 1;
4780         }
4781 }
4782
4783
4784 /**
4785  * dc395x_init_one - Initialise a single instance of the adapter.
4786  *
4787  * The PCI layer will call this once for each instance of the adapter
4788  * that it finds in the system. The pci_dev strcuture indicates which
4789  * instance we are being called from.
4790  *
4791  * @dev: The PCI device to initialize.
4792  * @id: Looks like a pointer to the entry in our pci device table
4793  * that was actually matched by the PCI subsystem.
4794  *
4795  * Returns 0 on success, or an error code (-ve) on failure.
4796  **/
4797 static int __devinit dc395x_init_one(struct pci_dev *dev,
4798                 const struct pci_device_id *id)
4799 {
4800         struct Scsi_Host *scsi_host = NULL;
4801         struct AdapterCtlBlk *acb = NULL;
4802         unsigned long io_port_base;
4803         unsigned int io_port_len;
4804         unsigned int irq;
4805
4806         dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4807         banner_display();
4808
4809         if (pci_enable_device(dev))
4810         {
4811                 dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4812                 return -ENODEV;
4813         }
4814         io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4815         io_port_len = pci_resource_len(dev, 0);
4816         irq = dev->irq;
4817         dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4818
4819         /* allocate scsi host information (includes out adapter) */
4820         scsi_host = scsi_host_alloc(&dc395x_driver_template,
4821                                     sizeof(struct AdapterCtlBlk));
4822         if (!scsi_host) {
4823                 dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4824                 goto fail;
4825         }
4826         acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4827         acb->scsi_host = scsi_host;
4828         acb->dev = dev;
4829
4830         /* initialise the adapter and everything we need */
4831         if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4832                 dprintkl(KERN_INFO, "adapter init failed\n");
4833                 goto fail;
4834         }
4835
4836         pci_set_master(dev);
4837
4838         /* get the scsi mid level to scan for new devices on the bus */
4839         if (scsi_add_host(scsi_host, &dev->dev)) {
4840                 dprintkl(KERN_ERR, "scsi_add_host failed\n");
4841                 goto fail;
4842         }
4843         pci_set_drvdata(dev, scsi_host);
4844         scsi_scan_host(scsi_host);
4845
4846         return 0;
4847
4848 fail:
4849         if (acb != NULL)
4850                 adapter_uninit(acb);
4851         if (scsi_host != NULL)
4852                 scsi_host_put(scsi_host);
4853         pci_disable_device(dev);
4854         return -ENODEV;
4855 }
4856
4857
4858 /**
4859  * dc395x_remove_one - Called to remove a single instance of the
4860  * adapter.
4861  *
4862  * @dev: The PCI device to initialize.
4863  **/
4864 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4865 {
4866         struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4867         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4868
4869         dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4870
4871         scsi_remove_host(scsi_host);
4872         adapter_uninit(acb);
4873         pci_disable_device(dev);
4874         scsi_host_put(scsi_host);
4875         pci_set_drvdata(dev, NULL);
4876 }
4877
4878
4879 static struct pci_device_id dc395x_pci_table[] = {
4880         {
4881                 .vendor         = PCI_VENDOR_ID_TEKRAM,
4882                 .device         = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4883                 .subvendor      = PCI_ANY_ID,
4884                 .subdevice      = PCI_ANY_ID,
4885          },
4886         {}                      /* Terminating entry */
4887 };
4888 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4889
4890
4891 static struct pci_driver dc395x_driver = {
4892         .name           = DC395X_NAME,
4893         .id_table       = dc395x_pci_table,
4894         .probe          = dc395x_init_one,
4895         .remove         = __devexit_p(dc395x_remove_one),
4896 };
4897
4898
4899 /**
4900  * dc395x_module_init - Module initialization function
4901  *
4902  * Used by both module and built-in driver to initialise this driver.
4903  **/
4904 static int __init dc395x_module_init(void)
4905 {
4906         return pci_register_driver(&dc395x_driver);
4907 }
4908
4909
4910 /**
4911  * dc395x_module_exit - Module cleanup function.
4912  **/
4913 static void __exit dc395x_module_exit(void)
4914 {
4915         pci_unregister_driver(&dc395x_driver);
4916 }
4917
4918
4919 module_init(dc395x_module_init);
4920 module_exit(dc395x_module_exit);
4921
4922 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4923 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4924 MODULE_LICENSE("GPL");