drivers/scsi/dc395x.c

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