linux/drivers/scsi/dc395x.c
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   1/*
   2 * dc395x.c
   3 *
   4 * Device Driver for Tekram DC395(U/UW/F), DC315(U)
   5 * PCI SCSI Bus Master Host Adapter
   6 * (SCSI chip set used Tekram ASIC TRM-S1040)
   7 *
   8 * Authors:
   9 *  C.L. Huang <ching@tekram.com.tw>
  10 *  Erich Chen <erich@tekram.com.tw>
  11 *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
  12 *
  13 *  Kurt Garloff <garloff@suse.de>
  14 *  (C) 1999-2000 Kurt Garloff
  15 *
  16 *  Oliver Neukum <oliver@neukum.name>
  17 *  Ali Akcaagac <aliakc@web.de>
  18 *  Jamie Lenehan <lenehan@twibble.org>
  19 *  (C) 2003
  20 *
  21 * License: GNU GPL
  22 *
  23 *************************************************************************
  24 *
  25 * Redistribution and use in source and binary forms, with or without
  26 * modification, are permitted provided that the following conditions
  27 * are met:
  28 * 1. Redistributions of source code must retain the above copyright
  29 *    notice, this list of conditions and the following disclaimer.
  30 * 2. Redistributions in binary form must reproduce the above copyright
  31 *    notice, this list of conditions and the following disclaimer in the
  32 *    documentation and/or other materials provided with the distribution.
  33 * 3. The name of the author may not be used to endorse or promote products
  34 *    derived from this software without specific prior written permission.
  35 *
  36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  46 *
  47 ************************************************************************
  48 */
  49#include <linux/module.h>
  50#include <linux/moduleparam.h>
  51#include <linux/delay.h>
  52#include <linux/ctype.h>
  53#include <linux/blkdev.h>
  54#include <linux/interrupt.h>
  55#include <linux/init.h>
  56#include <linux/spinlock.h>
  57#include <linux/pci.h>
  58#include <linux/list.h>
  59#include <linux/vmalloc.h>
  60#include <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
 189struct SGentry {
 190        u32 address;            /* bus! address */
 191        u32 length;
 192};
 193
 194/* The SEEPROM structure for TRM_S1040 */
 195struct 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
 202struct 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
 228struct 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
 269struct 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
 296struct 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 ---------------------------------------------------------------------------*/
 342static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 343                u16 *pscsi_status);
 344static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 345                u16 *pscsi_status);
 346static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 347                u16 *pscsi_status);
 348static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 349                u16 *pscsi_status);
 350static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 351                u16 *pscsi_status);
 352static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 353                u16 *pscsi_status);
 354static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 355                u16 *pscsi_status);
 356static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 357                u16 *pscsi_status);
 358static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 359                u16 *pscsi_status);
 360static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 361                u16 *pscsi_status);
 362static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 363                u16 *pscsi_status);
 364static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 365                u16 *pscsi_status);
 366static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
 367                u16 *pscsi_status);
 368static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 
 369                u16 *pscsi_status);
 370static void set_basic_config(struct AdapterCtlBlk *acb);
 371static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
 372                struct ScsiReqBlk *srb);
 373static void reset_scsi_bus(struct AdapterCtlBlk *acb);
 374static void data_io_transfer(struct AdapterCtlBlk *acb,
 375                struct ScsiReqBlk *srb, u16 io_dir);
 376static void disconnect(struct AdapterCtlBlk *acb);
 377static void reselect(struct AdapterCtlBlk *acb);
 378static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 379                struct ScsiReqBlk *srb);
 380static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
 381                struct ScsiReqBlk *srb);
 382static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
 383                struct ScsiReqBlk *srb);
 384static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
 385                struct scsi_cmnd *cmd, u8 force);
 386static void scsi_reset_detect(struct AdapterCtlBlk *acb);
 387static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
 388static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
 389                struct ScsiReqBlk *srb);
 390static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 391                struct ScsiReqBlk *srb);
 392static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
 393                struct ScsiReqBlk *srb);
 394static void set_xfer_rate(struct AdapterCtlBlk *acb,
 395                struct DeviceCtlBlk *dcb);
 396static void waiting_timeout(unsigned long ptr);
 397
 398
 399/*---------------------------------------------------------------------------
 400                                 Static Data
 401 ---------------------------------------------------------------------------*/
 402static u16 current_sync_offset = 0;
 403
 404static 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
 415static 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 */
 448static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
 449static 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 */
 485struct 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};
 492static struct ParameterData 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 */
 549static bool use_safe_settings = 0;
 550module_param_named(safe, use_safe_settings, bool, 0);
 551MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
 552
 553
 554module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
 555MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
 556
 557module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
 558MODULE_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
 560module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
 561MODULE_PARM_DESC(dev_mode, "Device mode.");
 562
 563module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
 564MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
 565
 566module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
 567MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
 568
 569module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
 570MODULE_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 **/
 577static void set_safe_settings(void)
 578{
 579        if (use_safe_settings)
 580        {
 581                int i;
 582
 583                dprintkl(KERN_INFO, "Using safe settings.\n");
 584                for (i = 0; i < CFG_NUM; i++)
 585                {
 586                        cfg_data[i].value = cfg_data[i].safe;
 587                }
 588        }
 589}
 590
 591
 592/**
 593 * fix_settings - reset any boot parameters which are out of range
 594 * back to the default values.
 595 **/
 596static void fix_settings(void)
 597{
 598        int i;
 599
 600        dprintkdbg(DBG_1,
 601                "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
 602                "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
 603                cfg_data[CFG_ADAPTER_ID].value,
 604                cfg_data[CFG_MAX_SPEED].value,
 605                cfg_data[CFG_DEV_MODE].value,
 606                cfg_data[CFG_ADAPTER_MODE].value,
 607                cfg_data[CFG_TAGS].value,
 608                cfg_data[CFG_RESET_DELAY].value);
 609        for (i = 0; i < CFG_NUM; i++)
 610        {
 611                if (cfg_data[i].value < cfg_data[i].min
 612                    || cfg_data[i].value > cfg_data[i].max)
 613                        cfg_data[i].value = cfg_data[i].def;
 614        }
 615}
 616
 617
 618
 619/*
 620 * Mapping from the eeprom delay index value (index into this array)
 621 * to the number of actual seconds that the delay should be for.
 622 */
 623static char eeprom_index_to_delay_map[] =
 624        { 1, 3, 5, 10, 16, 30, 60, 120 };
 625
 626
 627/**
 628 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
 629 * into a number of seconds.
 630 *
 631 * @eeprom: The eeprom structure in which we find the delay index to map.
 632 **/
 633static void eeprom_index_to_delay(struct NvRamType *eeprom)
 634{
 635        eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
 636}
 637
 638
 639/**
 640 * delay_to_eeprom_index - Take a delay in seconds and return the
 641 * closest eeprom index which will delay for at least that amount of
 642 * seconds.
 643 *
 644 * @delay: The delay, in seconds, to find the eeprom index for.
 645 **/
 646static int delay_to_eeprom_index(int delay)
 647{
 648        u8 idx = 0;
 649        while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
 650                idx++;
 651        return idx;
 652}
 653
 654
 655/**
 656 * eeprom_override - Override the eeprom settings, in the provided
 657 * eeprom structure, with values that have been set on the command
 658 * line.
 659 *
 660 * @eeprom: The eeprom data to override with command line options.
 661 **/
 662static void eeprom_override(struct NvRamType *eeprom)
 663{
 664        u8 id;
 665
 666        /* Adapter Settings */
 667        if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
 668                eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
 669
 670        if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
 671                eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
 672
 673        if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
 674                eeprom->delay_time = delay_to_eeprom_index(
 675                                        cfg_data[CFG_RESET_DELAY].value);
 676
 677        if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
 678                eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
 679
 680        /* Device Settings */
 681        for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
 682                if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
 683                        eeprom->target[id].cfg0 =
 684                                (u8)cfg_data[CFG_DEV_MODE].value;
 685
 686                if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
 687                        eeprom->target[id].period =
 688                                (u8)cfg_data[CFG_MAX_SPEED].value;
 689
 690        }
 691}
 692
 693
 694/*---------------------------------------------------------------------------
 695 ---------------------------------------------------------------------------*/
 696
 697static 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
 707static 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
 736static 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 */
 746static 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
 757static 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
 771static 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
 778static 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
 787static 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
 796static 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
 804static 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
 819static 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
 835static 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
 845static 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 */
 856static 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 */
 873static 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 */
 939static 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 */
 952static 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) */
 959static 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 */
 980static 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 **/
1083static 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
1146complete:
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
1157static DEF_SCSI_QCMD(dc395x_queue_command)
1158
1159/*
1160 * Return the disk geometry for the given SCSI device.
1161 */
1162static 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
1191static 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
1257static 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
1271static 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 */
1299static 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
1345static 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 */
1361static 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 */
1403static 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 */
1431static 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 */
1456void selection_timeout_missed(unsigned long ptr);
1457/* Sets the timer to wake us up */
1458static 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
1474void 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
1492static 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 */
1681static 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 **/
1699static 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
1803static 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
1842static 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
1854static 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
1887static 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
1895static 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 */
1933static 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 */
1953static 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 */
1997static 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 */
2011static 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
2037static 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
2170static 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
2180static 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
2393static 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
2402static 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
2578static 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
2592static 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 */
2604static 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 */
2618static 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
2632static 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
2685static 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 */
2696static 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 */
2719static 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
2792static 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
2811static 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 */
2863static 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
2974static 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
2990static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2991                u16 *pscsi_status)
2992{
2993}
2994
2995
2996static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2997                u16 *pscsi_status)
2998{
2999}
3000
3001
3002static 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
3025static 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
3121static 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
3220static 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
3236static 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
3257static 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 */
3268static 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 */
3289static 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 */
3312static 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 */
3522static 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
3593static 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
3604static 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
3640static 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
3675static 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 **/
3731static 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 **/
3800static 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 **/
3828static 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 */
3863static 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 **/
3884static 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 **/
3903static 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 **/
3923static 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 **/
3941static void 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 **/
3958static void 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 **/
4003static void 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 **/
4057static void 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 **/
4097static u8 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 **/
4135static void 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 **/
4165static void 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 **/
4235static void 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 */
4250static 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 */
4263static int 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 **/
4309static void 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 **/
4353static void 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 **/
4415static void 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 **/
4456static void 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 **/
4509static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port,
4510                        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
4553failed:
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 **/
4571static 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 **/
4594static 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...) seq_printf(m,##args)
4620
4621#undef YESNO
4622#define YESNO(YN) \
4623 if (YN) SPRINTF(" Yes ");\
4624 else SPRINTF(" No  ")
4625
4626static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host)
4627{
4628        struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4629        int spd, spd1;
4630        struct DeviceCtlBlk *dcb;
4631        unsigned long flags;
4632        int dev;
4633
4634        SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4635        SPRINTF(" Driver Version " DC395X_VERSION "\n");
4636
4637        DC395x_LOCK_IO(acb->scsi_host, flags);
4638
4639        SPRINTF("SCSI Host Nr %i, ", host->host_no);
4640        SPRINTF("DC395U/UW/F DC315/U %s\n",
4641                (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4642        SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4643        SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4644        SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4645
4646        SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4647        SPRINTF("AdapterID %i\n", host->this_id);
4648
4649        SPRINTF("tag_max_num %i", acb->tag_max_num);
4650        /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4651        SPRINTF(", FilterCfg 0x%02x",
4652                DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4653        SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4654        /*SPRINTF("\n"); */
4655
4656        SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4657        SPRINTF
4658            ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4659             acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4660             acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4661             acb->dcb_map[6], acb->dcb_map[7]);
4662        SPRINTF
4663            ("                      %02x %02x %02x %02x %02x %02x %02x %02x\n",
4664             acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4665             acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4666             acb->dcb_map[14], acb->dcb_map[15]);
4667
4668        SPRINTF
4669            ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4670
4671        dev = 0;
4672        list_for_each_entry(dcb, &acb->dcb_list, list) {
4673                int nego_period;
4674                SPRINTF("%02i %02i  %02i ", dev, dcb->target_id,
4675                        dcb->target_lun);
4676                YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4677                YESNO(dcb->sync_offset);
4678                YESNO(dcb->sync_period & WIDE_SYNC);
4679                YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4680                YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4681                YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4682                nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4683                if (dcb->sync_offset)
4684                        SPRINTF("  %03i ns ", nego_period);
4685                else
4686                        SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4687
4688                if (dcb->sync_offset & 0x0f) {
4689                        spd = 1000 / (nego_period);
4690                        spd1 = 1000 % (nego_period);
4691                        spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4692                        SPRINTF("   %2i.%1i M     %02i ", spd, spd1,
4693                                (dcb->sync_offset & 0x0f));
4694                } else
4695                        SPRINTF("                 ");
4696
4697                /* Add more info ... */
4698                SPRINTF("     %02i\n", dcb->max_command);
4699                dev++;
4700        }
4701
4702        if (timer_pending(&acb->waiting_timer))
4703                SPRINTF("Waiting queue timer running\n");
4704        else
4705                SPRINTF("\n");
4706
4707        list_for_each_entry(dcb, &acb->dcb_list, list) {
4708                struct ScsiReqBlk *srb;
4709                if (!list_empty(&dcb->srb_waiting_list))
4710                        SPRINTF("DCB (%02i-%i): Waiting: %i:",
4711                                dcb->target_id, dcb->target_lun,
4712                                list_size(&dcb->srb_waiting_list));
4713                list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4714                        SPRINTF(" %p", srb->cmd);
4715                if (!list_empty(&dcb->srb_going_list))
4716                        SPRINTF("\nDCB (%02i-%i): Going  : %i:",
4717                                dcb->target_id, dcb->target_lun,
4718                                list_size(&dcb->srb_going_list));
4719                list_for_each_entry(srb, &dcb->srb_going_list, list)
4720                        SPRINTF(" %p", srb->cmd);
4721                if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4722                        SPRINTF("\n");
4723        }
4724
4725        if (debug_enabled(DBG_1)) {
4726                SPRINTF("DCB list for ACB %p:\n", acb);
4727                list_for_each_entry(dcb, &acb->dcb_list, list) {
4728                        SPRINTF("%p -> ", dcb);
4729                }
4730                SPRINTF("END\n");
4731        }
4732
4733        DC395x_UNLOCK_IO(acb->scsi_host, flags);
4734        return 0;
4735}
4736
4737
4738static struct scsi_host_template dc395x_driver_template = {
4739        .module                 = THIS_MODULE,
4740        .proc_name              = DC395X_NAME,
4741        .show_info              = dc395x_show_info,
4742        .name                   = DC395X_BANNER " " DC395X_VERSION,
4743        .queuecommand           = dc395x_queue_command,
4744        .bios_param             = dc395x_bios_param,
4745        .slave_alloc            = dc395x_slave_alloc,
4746        .slave_destroy          = dc395x_slave_destroy,
4747        .can_queue              = DC395x_MAX_CAN_QUEUE,
4748        .this_id                = 7,
4749        .sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4750        .cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4751        .eh_abort_handler       = dc395x_eh_abort,
4752        .eh_bus_reset_handler   = dc395x_eh_bus_reset,
4753        .use_clustering         = DISABLE_CLUSTERING,
4754};
4755
4756
4757/**
4758 * banner_display - Display banner on first instance of driver
4759 * initialized.
4760 **/
4761static void banner_display(void)
4762{
4763        static int banner_done = 0;
4764        if (!banner_done)
4765        {
4766                dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4767                banner_done = 1;
4768        }
4769}
4770
4771
4772/**
4773 * dc395x_init_one - Initialise a single instance of the adapter.
4774 *
4775 * The PCI layer will call this once for each instance of the adapter
4776 * that it finds in the system. The pci_dev strcuture indicates which
4777 * instance we are being called from.
4778 * 
4779 * @dev: The PCI device to initialize.
4780 * @id: Looks like a pointer to the entry in our pci device table
4781 * that was actually matched by the PCI subsystem.
4782 *
4783 * Returns 0 on success, or an error code (-ve) on failure.
4784 **/
4785static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
4786{
4787        struct Scsi_Host *scsi_host = NULL;
4788        struct AdapterCtlBlk *acb = NULL;
4789        unsigned long io_port_base;
4790        unsigned int io_port_len;
4791        unsigned int irq;
4792        
4793        dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4794        banner_display();
4795
4796        if (pci_enable_device(dev))
4797        {
4798                dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4799                return -ENODEV;
4800        }
4801        io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4802        io_port_len = pci_resource_len(dev, 0);
4803        irq = dev->irq;
4804        dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4805
4806        /* allocate scsi host information (includes out adapter) */
4807        scsi_host = scsi_host_alloc(&dc395x_driver_template,
4808                                    sizeof(struct AdapterCtlBlk));
4809        if (!scsi_host) {
4810                dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4811                goto fail;
4812        }
4813        acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4814        acb->scsi_host = scsi_host;
4815        acb->dev = dev;
4816
4817        /* initialise the adapter and everything we need */
4818        if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4819                dprintkl(KERN_INFO, "adapter init failed\n");
4820                goto fail;
4821        }
4822
4823        pci_set_master(dev);
4824
4825        /* get the scsi mid level to scan for new devices on the bus */
4826        if (scsi_add_host(scsi_host, &dev->dev)) {
4827                dprintkl(KERN_ERR, "scsi_add_host failed\n");
4828                goto fail;
4829        }
4830        pci_set_drvdata(dev, scsi_host);
4831        scsi_scan_host(scsi_host);
4832                
4833        return 0;
4834
4835fail:
4836        if (acb != NULL)
4837                adapter_uninit(acb);
4838        if (scsi_host != NULL)
4839                scsi_host_put(scsi_host);
4840        pci_disable_device(dev);
4841        return -ENODEV;
4842}
4843
4844
4845/**
4846 * dc395x_remove_one - Called to remove a single instance of the
4847 * adapter.
4848 *
4849 * @dev: The PCI device to initialize.
4850 **/
4851static void dc395x_remove_one(struct pci_dev *dev)
4852{
4853        struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4854        struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4855
4856        dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4857
4858        scsi_remove_host(scsi_host);
4859        adapter_uninit(acb);
4860        pci_disable_device(dev);
4861        scsi_host_put(scsi_host);
4862        pci_set_drvdata(dev, NULL);
4863}
4864
4865
4866static struct pci_device_id dc395x_pci_table[] = {
4867        {
4868                .vendor         = PCI_VENDOR_ID_TEKRAM,
4869                .device         = PCI_DEVICE_ID_TEKRAM_TRMS1040,
4870                .subvendor      = PCI_ANY_ID,
4871                .subdevice      = PCI_ANY_ID,
4872         },
4873        {}                      /* Terminating entry */
4874};
4875MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4876
4877
4878static struct pci_driver dc395x_driver = {
4879        .name           = DC395X_NAME,
4880        .id_table       = dc395x_pci_table,
4881        .probe          = dc395x_init_one,
4882        .remove         = dc395x_remove_one,
4883};
4884
4885
4886/**
4887 * dc395x_module_init - Module initialization function
4888 *
4889 * Used by both module and built-in driver to initialise this driver.
4890 **/
4891static int __init dc395x_module_init(void)
4892{
4893        return pci_register_driver(&dc395x_driver);
4894}
4895
4896
4897/**
4898 * dc395x_module_exit - Module cleanup function.
4899 **/
4900static void __exit dc395x_module_exit(void)
4901{
4902        pci_unregister_driver(&dc395x_driver);
4903}
4904
4905
4906module_init(dc395x_module_init);
4907module_exit(dc395x_module_exit);
4908
4909MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4910MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4911MODULE_LICENSE("GPL");
4912
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