linux/drivers/scsi/ibmmca.c
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   1/*
   2 Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for
   3 Linux Kernel >= 2.4.0.
   4 Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU
   5 General Public License. Written by Martin Kolinek, December 1995.
   6 Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang
   7 See the file Documentation/scsi/ibmmca.txt for a detailed description
   8 of this driver, the commandline arguments and the history of its
   9 development.
  10 See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
  11 updates, info and ADF-files for adapters supported by this driver.
  12
  13 Alan Cox <alan@lxorguk.ukuu.org.uk>
  14 Updated for Linux 2.5.45 to use the new error handler, cleaned up the
  15 lock macros and did a few unavoidable locking tweaks, plus one locking
  16 fix in the irq and completion path.
  17 
  18 */
  19
  20#include <linux/module.h>
  21#include <linux/kernel.h>
  22#include <linux/types.h>
  23#include <linux/ctype.h>
  24#include <linux/string.h>
  25#include <linux/interrupt.h>
  26#include <linux/ioport.h>
  27#include <linux/delay.h>
  28#include <linux/blkdev.h>
  29#include <linux/proc_fs.h>
  30#include <linux/stat.h>
  31#include <linux/mca.h>
  32#include <linux/spinlock.h>
  33#include <linux/init.h>
  34
  35#include <asm/system.h>
  36#include <asm/io.h>
  37
  38#include "scsi.h"
  39#include <scsi/scsi_host.h>
  40
  41/* Common forward declarations for all Linux-versions: */
  42static int ibmmca_queuecommand (struct Scsi_Host *, struct scsi_cmnd *);
  43static int ibmmca_abort (Scsi_Cmnd *);
  44static int ibmmca_host_reset (Scsi_Cmnd *);
  45static int ibmmca_biosparam (struct scsi_device *, struct block_device *, sector_t, int *);
  46static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout);
  47
  48
  49
  50/* current version of this driver-source: */
  51#define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac"
  52
  53/* driver configuration */
  54#define IM_MAX_HOSTS     8      /* maximum number of host adapters */
  55#define IM_RESET_DELAY  60      /* seconds allowed for a reset */
  56
  57/* driver debugging - #undef all for normal operation */
  58/* if defined: count interrupts and ignore this special one: */
  59#undef  IM_DEBUG_TIMEOUT        //50
  60#define TIMEOUT_PUN     0
  61#define TIMEOUT_LUN     0
  62/* verbose interrupt: */
  63#undef IM_DEBUG_INT
  64/* verbose queuecommand: */
  65#undef IM_DEBUG_CMD
  66/* verbose queucommand for specific SCSI-device type: */
  67#undef IM_DEBUG_CMD_SPEC_DEV
  68/* verbose device probing */
  69#undef IM_DEBUG_PROBE
  70
  71/* device type that shall be displayed on syslog (only during debugging): */
  72#define IM_DEBUG_CMD_DEVICE     TYPE_TAPE
  73
  74/* relative addresses of hardware registers on a subsystem */
  75#define IM_CMD_REG(h)   ((h)->io_port)  /*Command Interface, (4 bytes long) */
  76#define IM_ATTN_REG(h)  ((h)->io_port+4)        /*Attention (1 byte) */
  77#define IM_CTR_REG(h)   ((h)->io_port+5)        /*Basic Control (1 byte) */
  78#define IM_INTR_REG(h)  ((h)->io_port+6)        /*Interrupt Status (1 byte, r/o) */
  79#define IM_STAT_REG(h)  ((h)->io_port+7)        /*Basic Status (1 byte, read only) */
  80
  81/* basic I/O-port of first adapter */
  82#define IM_IO_PORT      0x3540
  83/* maximum number of hosts that can be found */
  84#define IM_N_IO_PORT    8
  85
  86/*requests going into the upper nibble of the Attention register */
  87/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
  88#define IM_IMM_CMD      0x10    /*immediate command */
  89#define IM_SCB          0x30    /*Subsystem Control Block command */
  90#define IM_LONG_SCB     0x40    /*long Subsystem Control Block command */
  91#define IM_EOI          0xe0    /*end-of-interrupt request */
  92
  93/*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */
  94#define IM_HW_RESET     0x80    /*hardware reset */
  95#define IM_ENABLE_DMA   0x02    /*enable subsystem's busmaster DMA */
  96#define IM_ENABLE_INTR  0x01    /*enable interrupts to the system */
  97
  98/*to interpret the upper nibble of Interrupt Status register */
  99/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
 100#define IM_SCB_CMD_COMPLETED                    0x10
 101#define IM_SCB_CMD_COMPLETED_WITH_RETRIES       0x50
 102#define IM_LOOP_SCATTER_BUFFER_FULL             0x60
 103#define IM_ADAPTER_HW_FAILURE                   0x70
 104#define IM_IMMEDIATE_CMD_COMPLETED              0xa0
 105#define IM_CMD_COMPLETED_WITH_FAILURE           0xc0
 106#define IM_CMD_ERROR                            0xe0
 107#define IM_SOFTWARE_SEQUENCING_ERROR            0xf0
 108
 109/*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */
 110#define IM_CMD_REG_FULL         0x08
 111#define IM_CMD_REG_EMPTY        0x04
 112#define IM_INTR_REQUEST         0x02
 113#define IM_BUSY                 0x01
 114
 115/*immediate commands (word written into low 2 bytes of command reg) */
 116#define IM_RESET_IMM_CMD        0x0400
 117#define IM_FEATURE_CTR_IMM_CMD  0x040c
 118#define IM_DMA_PACING_IMM_CMD   0x040d
 119#define IM_ASSIGN_IMM_CMD       0x040e
 120#define IM_ABORT_IMM_CMD        0x040f
 121#define IM_FORMAT_PREP_IMM_CMD  0x0417
 122
 123/*SCB (Subsystem Control Block) structure */
 124struct im_scb {
 125        unsigned short command; /*command word (read, etc.) */
 126        unsigned short enable;  /*enable word, modifies cmd */
 127        union {
 128                unsigned long log_blk_adr;      /*block address on SCSI device */
 129                unsigned char scsi_cmd_length;  /*6,10,12, for other scsi cmd */
 130        } u1;
 131        unsigned long sys_buf_adr;      /*physical system memory adr */
 132        unsigned long sys_buf_length;   /*size of sys mem buffer */
 133        unsigned long tsb_adr;  /*Termination Status Block adr */
 134        unsigned long scb_chain_adr;    /*optional SCB chain address */
 135        union {
 136                struct {
 137                        unsigned short count;   /*block count, on SCSI device */
 138                        unsigned short length;  /*block length, on SCSI device */
 139                } blk;
 140                unsigned char scsi_command[12]; /*other scsi command */
 141        } u2;
 142};
 143
 144/*structure scatter-gather element (for list of system memory areas) */
 145struct im_sge {
 146        void *address;
 147        unsigned long byte_length;
 148};
 149
 150/*structure returned by a get_pos_info command: */
 151struct im_pos_info {
 152        unsigned short pos_id;  /* adapter id */
 153        unsigned char pos_3a;   /* pos 3 (if pos 6 = 0) */
 154        unsigned char pos_2;    /* pos 2 */
 155        unsigned char int_level;        /* interrupt level IRQ 11 or 14 */
 156        unsigned char pos_4a;   /* pos 4 (if pos 6 = 0) */
 157        unsigned short connector_size;  /* MCA connector size: 16 or 32 Bit */
 158        unsigned char num_luns; /* number of supported luns per device */
 159        unsigned char num_puns; /* number of supported puns */
 160        unsigned char pacing_factor;    /* pacing factor */
 161        unsigned char num_ldns; /* number of ldns available */
 162        unsigned char eoi_off;  /* time EOI and interrupt inactive */
 163        unsigned char max_busy; /* time between reset and busy on */
 164        unsigned short cache_stat;      /* ldn cachestat. Bit=1 = not cached */
 165        unsigned short retry_stat;      /* retry status of ldns. Bit=1=disabled */
 166        unsigned char pos_4b;   /* pos 4 (if pos 6 = 1) */
 167        unsigned char pos_3b;   /* pos 3 (if pos 6 = 1) */
 168        unsigned char pos_6;    /* pos 6 */
 169        unsigned char pos_5;    /* pos 5 */
 170        unsigned short max_overlap;     /* maximum overlapping requests */
 171        unsigned short num_bus; /* number of SCSI-busses */
 172};
 173
 174/*values for SCB command word */
 175#define IM_NO_SYNCHRONOUS      0x0040   /*flag for any command */
 176#define IM_NO_DISCONNECT       0x0080   /*flag for any command */
 177#define IM_READ_DATA_CMD       0x1c01
 178#define IM_WRITE_DATA_CMD      0x1c02
 179#define IM_READ_VERIFY_CMD     0x1c03
 180#define IM_WRITE_VERIFY_CMD    0x1c04
 181#define IM_REQUEST_SENSE_CMD   0x1c08
 182#define IM_READ_CAPACITY_CMD   0x1c09
 183#define IM_DEVICE_INQUIRY_CMD  0x1c0b
 184#define IM_READ_LOGICAL_CMD    0x1c2a
 185#define IM_OTHER_SCSI_CMD_CMD  0x241f
 186
 187/* unused, but supported, SCB commands */
 188#define IM_GET_COMMAND_COMPLETE_STATUS_CMD   0x1c07     /* command status */
 189#define IM_GET_POS_INFO_CMD                  0x1c0a     /* returns neat stuff */
 190#define IM_READ_PREFETCH_CMD                 0x1c31     /* caching controller only */
 191#define IM_FOMAT_UNIT_CMD                    0x1c16     /* format unit */
 192#define IM_REASSIGN_BLOCK_CMD                0x1c18     /* in case of error */
 193
 194/*values to set bits in the enable word of SCB */
 195#define IM_READ_CONTROL              0x8000
 196#define IM_REPORT_TSB_ONLY_ON_ERROR  0x4000
 197#define IM_RETRY_ENABLE              0x2000
 198#define IM_POINTER_TO_LIST           0x1000
 199#define IM_SUPRESS_EXCEPTION_SHORT   0x0400
 200#define IM_BYPASS_BUFFER             0x0200
 201#define IM_CHAIN_ON_NO_ERROR         0x0001
 202
 203/*TSB (Termination Status Block) structure */
 204struct im_tsb {
 205        unsigned short end_status;
 206        unsigned short reserved1;
 207        unsigned long residual_byte_count;
 208        unsigned long sg_list_element_adr;
 209        unsigned short status_length;
 210        unsigned char dev_status;
 211        unsigned char cmd_status;
 212        unsigned char dev_error;
 213        unsigned char cmd_error;
 214        unsigned short reserved2;
 215        unsigned short reserved3;
 216        unsigned short low_of_last_scb_adr;
 217        unsigned short high_of_last_scb_adr;
 218};
 219
 220/*subsystem uses interrupt request level 14 */
 221#define IM_IRQ     14
 222/*SCSI-2 F/W may evade to interrupt 11 */
 223#define IM_IRQ_FW  11
 224
 225/* Model 95 has an additional alphanumeric display, which can be used
 226   to display SCSI-activities. 8595 models do not have any disk led, which
 227   makes this feature quite useful.
 228   The regular PS/2 disk led is turned on/off by bits 6,7 of system
 229   control port. */
 230
 231/* LED display-port (actually, last LED on display) */
 232#define MOD95_LED_PORT     0x108
 233/* system-control-register of PS/2s with diskindicator */
 234#define PS2_SYS_CTR        0x92
 235/* activity displaying methods */
 236#define LED_DISP           1
 237#define LED_ADISP          2
 238#define LED_ACTIVITY       4
 239/* failed intr */
 240#define CMD_FAIL           255
 241
 242/* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED
 243   displays. ldn is no longer displayed here, because the ldn mapping is now 
 244   done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime 
 245   or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble, 
 246   interest, debugging or just for having fun. The left number gives the
 247   host-adapter number and the right shows the accessed SCSI-ID. */
 248
 249/* display_mode is set by the ibmmcascsi= command line arg */
 250static int display_mode = 0;
 251/* set default adapter timeout */
 252static unsigned int adapter_timeout = 45;
 253/* for probing on feature-command: */
 254static unsigned int global_command_error_excuse = 0;
 255/* global setting by command line for adapter_speed */
 256static int global_adapter_speed = 0;    /* full speed by default */
 257
 258/* Panel / LED on, do it right for F/W addressin, too. adisplay will
 259 * just ignore ids>7, as the panel has only 7 digits available */
 260#define PS2_DISK_LED_ON(ad,id) { if (display_mode & LED_DISP) { if (id>9) \
 261    outw((ad+48)|((id+55)<<8), MOD95_LED_PORT ); else \
 262    outw((ad+48)|((id+48)<<8), MOD95_LED_PORT ); } else \
 263    if (display_mode & LED_ADISP) { if (id<7) outb((char)(id+48),MOD95_LED_PORT+1+id); \
 264    outb((char)(ad+48), MOD95_LED_PORT); } \
 265    if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
 266    outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); }
 267
 268/* Panel / LED off */
 269/* bug fixed, Dec 15, 1997, where | was replaced by & here */
 270#define PS2_DISK_LED_OFF() { if (display_mode & LED_DISP) \
 271    outw(0x2020, MOD95_LED_PORT ); else if (display_mode & LED_ADISP) { \
 272    outl(0x20202020,MOD95_LED_PORT); outl(0x20202020,MOD95_LED_PORT+4); } \
 273    if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
 274    outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); }
 275
 276/* types of different supported hardware that goes to hostdata special */
 277#define IBM_SCSI2_FW     0
 278#define IBM_7568_WCACHE  1
 279#define IBM_EXP_UNIT     2
 280#define IBM_SCSI_WCACHE  3
 281#define IBM_SCSI         4
 282#define IBM_INTEGSCSI    5
 283
 284/* other special flags for hostdata structure */
 285#define FORCED_DETECTION         100
 286#define INTEGRATED_SCSI          101
 287
 288/* List of possible IBM-SCSI-adapters */
 289static short ibmmca_id_table[] = {
 290        0x8efc,
 291        0x8efd,
 292        0x8ef8,
 293        0x8eff,
 294        0x8efe,
 295        /* No entry for integrated SCSI, that's part of the register */
 296        0
 297};
 298
 299static const char *ibmmca_description[] = {
 300        "IBM SCSI-2 F/W Adapter",       /* special = 0 */
 301        "IBM 7568 Industrial Computer SCSI Adapter w/Cache",    /* special = 1 */
 302        "IBM Expansion Unit SCSI Controller",   /* special = 2 */
 303        "IBM SCSI Adapter w/Cache",     /* special = 3 */
 304        "IBM SCSI Adapter",     /* special = 4 */
 305        "IBM Integrated SCSI Controller", /* special = 5 */
 306};
 307
 308/* Max number of logical devices (can be up from 0 to 14).  15 is the address
 309of the adapter itself. */
 310#define MAX_LOG_DEV  15
 311
 312/*local data for a logical device */
 313struct logical_device {
 314        struct im_scb scb;      /* SCSI-subsystem-control-block structure */
 315        struct im_tsb tsb;      /* SCSI command complete status block structure */
 316        struct im_sge sge[16];  /* scatter gather list structure */
 317        unsigned char buf[256]; /* SCSI command return data buffer */
 318        Scsi_Cmnd *cmd;         /* SCSI-command that is currently in progress */
 319        int device_type;        /* type of the SCSI-device. See include/scsi/scsi.h
 320                                   for interpretation of the possible values */
 321        int block_length;       /* blocksize of a particular logical SCSI-device */
 322        int cache_flag;         /* 1 if this is uncached, 0 if cache is present for ldn */
 323        int retry_flag;         /* 1 if adapter retry is disabled, 0 if enabled */
 324};
 325
 326/* statistics of the driver during operations (for proc_info) */
 327struct Driver_Statistics {
 328        /* SCSI statistics on the adapter */
 329        int ldn_access[MAX_LOG_DEV + 1];        /* total accesses on a ldn */
 330        int ldn_read_access[MAX_LOG_DEV + 1];   /* total read-access on a ldn */
 331        int ldn_write_access[MAX_LOG_DEV + 1];  /* total write-access on a ldn */
 332        int ldn_inquiry_access[MAX_LOG_DEV + 1];        /* total inquiries on a ldn */
 333        int ldn_modeselect_access[MAX_LOG_DEV + 1];     /* total mode selects on ldn */
 334        int scbs;               /* short SCBs queued */
 335        int long_scbs;          /* long SCBs queued */
 336        int total_accesses;     /* total accesses on all ldns */
 337        int total_interrupts;   /* total interrupts (should be
 338                                   same as total_accesses) */
 339        int total_errors;       /* command completed with error */
 340        /* dynamical assignment statistics */
 341        int total_scsi_devices; /* number of physical pun,lun */
 342        int dyn_flag;           /* flag showing dynamical mode */
 343        int dynamical_assignments;      /* number of remappings of ldns */
 344        int ldn_assignments[MAX_LOG_DEV + 1];   /* number of remappings of each
 345                                                   ldn */
 346};
 347
 348/* data structure for each host adapter */
 349struct ibmmca_hostdata {
 350        /* array of logical devices: */
 351        struct logical_device _ld[MAX_LOG_DEV + 1];
 352        /* array to convert (pun, lun) into logical device number: */
 353        unsigned char _get_ldn[16][8];
 354        /*array that contains the information about the physical SCSI-devices
 355           attached to this host adapter: */
 356        unsigned char _get_scsi[16][8];
 357        /* used only when checking logical devices: */
 358        int _local_checking_phase_flag;
 359        /* report received interrupt: */
 360        int _got_interrupt;
 361        /* report termination-status of SCSI-command: */
 362        int _stat_result;
 363        /* reset status (used only when doing reset): */
 364        int _reset_status;
 365        /* code of the last SCSI command (needed for panic info): */
 366        int _last_scsi_command[MAX_LOG_DEV + 1];
 367        /* identifier of the last SCSI-command type */
 368        int _last_scsi_type[MAX_LOG_DEV + 1];
 369        /* last blockcount */
 370        int _last_scsi_blockcount[MAX_LOG_DEV + 1];
 371        /* last locgical block address */
 372        unsigned long _last_scsi_logical_block[MAX_LOG_DEV + 1];
 373        /* Counter that points on the next reassignable ldn for dynamical
 374           remapping. The default value is 7, that is the first reassignable
 375           number in the list at boottime: */
 376        int _next_ldn;
 377        /* Statistics-structure for this IBM-SCSI-host: */
 378        struct Driver_Statistics _IBM_DS;
 379        /* This hostadapters pos-registers pos2 until pos6 */
 380        unsigned int _pos[8];
 381        /* assign a special variable, that contains dedicated info about the
 382           adaptertype */
 383        int _special;
 384        /* connector size on the MCA bus */
 385        int _connector_size;
 386        /* synchronous SCSI transfer rate bitpattern */
 387        int _adapter_speed;
 388};
 389
 390/* macros to access host data structure */
 391#define subsystem_pun(h) ((h)->this_id)
 392#define subsystem_maxid(h) ((h)->max_id)
 393#define ld(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_ld)
 394#define get_ldn(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_get_ldn)
 395#define get_scsi(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_get_scsi)
 396#define local_checking_phase_flag(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_local_checking_phase_flag)
 397#define got_interrupt(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_got_interrupt)
 398#define stat_result(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_stat_result)
 399#define reset_status(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_reset_status)
 400#define last_scsi_command(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_command)
 401#define last_scsi_type(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_type)
 402#define last_scsi_blockcount(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_blockcount)
 403#define last_scsi_logical_block(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_logical_block)
 404#define last_scsi_type(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_type)
 405#define next_ldn(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_next_ldn)
 406#define IBM_DS(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_IBM_DS)
 407#define special(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_special)
 408#define subsystem_connector_size(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_connector_size)
 409#define adapter_speed(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_adapter_speed)
 410#define pos2(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[2])
 411#define pos3(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[3])
 412#define pos4(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[4])
 413#define pos5(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[5])
 414#define pos6(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[6])
 415
 416/* Define a arbitrary number as subsystem-marker-type. This number is, as
 417   described in the ANSI-SCSI-standard, not occupied by other device-types. */
 418#define TYPE_IBM_SCSI_ADAPTER   0x2F
 419
 420/* Define 0xFF for no device type, because this type is not defined within
 421   the ANSI-SCSI-standard, therefore, it can be used and should not cause any
 422   harm. */
 423#define TYPE_NO_DEVICE          0xFF
 424
 425/* define medium-changer. If this is not defined previously, e.g. Linux
 426   2.0.x, define this type here. */
 427#ifndef TYPE_MEDIUM_CHANGER
 428#define TYPE_MEDIUM_CHANGER     0x08
 429#endif
 430
 431/* define possible operations for the immediate_assign command */
 432#define SET_LDN        0
 433#define REMOVE_LDN     1
 434
 435/* ldn which is used to probe the SCSI devices */
 436#define PROBE_LDN      0
 437
 438/* reset status flag contents */
 439#define IM_RESET_NOT_IN_PROGRESS         0
 440#define IM_RESET_IN_PROGRESS             1
 441#define IM_RESET_FINISHED_OK             2
 442#define IM_RESET_FINISHED_FAIL           3
 443#define IM_RESET_NOT_IN_PROGRESS_NO_INT  4
 444#define IM_RESET_FINISHED_OK_NO_INT      5
 445
 446/* define undefined SCSI-command */
 447#define NO_SCSI                  0xffff
 448
 449/*-----------------------------------------------------------------------*/
 450
 451/* if this is nonzero, ibmmcascsi option has been passed to the kernel */
 452static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 453static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 };
 454
 455/* fill module-parameters only, when this define is present.
 456   (that is kernel version 2.1.x) */
 457#if defined(MODULE)
 458static char *boot_options = NULL;
 459module_param(boot_options, charp, 0);
 460module_param_array(io_port, int, NULL, 0);
 461module_param_array(scsi_id, int, NULL, 0);
 462
 463MODULE_LICENSE("GPL");
 464#endif
 465/*counter of concurrent disk read/writes, to turn on/off disk led */
 466static int disk_rw_in_progress = 0;
 467
 468static unsigned int pos[8];     /* whole pos register-line for diagnosis */
 469/* Taking into account the additions, made by ZP Gu.
 470 * This selects now the preset value from the configfile and
 471 * offers the 'normal' commandline option to be accepted */
 472#ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD
 473static char ibm_ansi_order = 1;
 474#else
 475static char ibm_ansi_order = 0;
 476#endif
 477
 478static void issue_cmd(struct Scsi_Host *, unsigned long, unsigned char);
 479static void internal_done(Scsi_Cmnd * cmd);
 480static void check_devices(struct Scsi_Host *, int);
 481static int immediate_assign(struct Scsi_Host *, unsigned int, unsigned int, unsigned int, unsigned int);
 482static int immediate_feature(struct Scsi_Host *, unsigned int, unsigned int);
 483#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
 484static int immediate_reset(struct Scsi_Host *, unsigned int);
 485#endif
 486static int device_inquiry(struct Scsi_Host *, int);
 487static int read_capacity(struct Scsi_Host *, int);
 488static int get_pos_info(struct Scsi_Host *);
 489static char *ti_p(int);
 490static char *ti_l(int);
 491static char *ibmrate(unsigned int, int);
 492static int probe_display(int);
 493static int probe_bus_mode(struct Scsi_Host *);
 494static int device_exists(struct Scsi_Host *, int, int *, int *);
 495static int option_setup(char *);
 496/* local functions needed for proc_info */
 497static int ldn_access_load(struct Scsi_Host *, int);
 498static int ldn_access_total_read_write(struct Scsi_Host *);
 499
 500static irqreturn_t interrupt_handler(int irq, void *dev_id)
 501{
 502        unsigned int intr_reg;
 503        unsigned int cmd_result;
 504        unsigned int ldn;
 505        unsigned long flags;
 506        Scsi_Cmnd *cmd;
 507        int lastSCSI;
 508        struct device *dev = dev_id;
 509        struct Scsi_Host *shpnt = dev_get_drvdata(dev);
 510
 511        spin_lock_irqsave(shpnt->host_lock, flags);
 512
 513        if(!(inb(IM_STAT_REG(shpnt)) & IM_INTR_REQUEST)) {
 514                spin_unlock_irqrestore(shpnt->host_lock, flags);
 515                return IRQ_NONE;
 516        }
 517
 518        /* the reset-function already did all the job, even ints got
 519           renabled on the subsystem, so just return */
 520        if ((reset_status(shpnt) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(shpnt) == IM_RESET_FINISHED_OK_NO_INT)) {
 521                reset_status(shpnt) = IM_RESET_NOT_IN_PROGRESS;
 522                spin_unlock_irqrestore(shpnt->host_lock, flags);
 523                return IRQ_HANDLED;
 524        }
 525
 526        /*must wait for attention reg not busy, then send EOI to subsystem */
 527        while (1) {
 528                if (!(inb(IM_STAT_REG(shpnt)) & IM_BUSY))
 529                        break;
 530                cpu_relax();
 531        }
 532
 533        /*get command result and logical device */
 534        intr_reg = (unsigned char) (inb(IM_INTR_REG(shpnt)));
 535        cmd_result = intr_reg & 0xf0;
 536        ldn = intr_reg & 0x0f;
 537        /* get the last_scsi_command here */
 538        lastSCSI = last_scsi_command(shpnt)[ldn];
 539        outb(IM_EOI | ldn, IM_ATTN_REG(shpnt));
 540        
 541        /*these should never happen (hw fails, or a local programming bug) */
 542        if (!global_command_error_excuse) {
 543                switch (cmd_result) {
 544                        /* Prevent from Ooopsing on error to show the real reason */
 545                case IM_ADAPTER_HW_FAILURE:
 546                case IM_SOFTWARE_SEQUENCING_ERROR:
 547                case IM_CMD_ERROR:
 548                        printk(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n");
 549                        printk(KERN_ERR "              Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(shpnt)[ldn].scb.enable);
 550                        if (ld(shpnt)[ldn].cmd)
 551                                printk("%ld/%ld,", (long) (scsi_bufflen(ld(shpnt)[ldn].cmd)), (long) (ld(shpnt)[ldn].scb.sys_buf_length));
 552                        else
 553                                printk("none,");
 554                        if (ld(shpnt)[ldn].cmd)
 555                                printk("Blocksize=%d", ld(shpnt)[ldn].scb.u2.blk.length);
 556                        else
 557                                printk("Blocksize=none");
 558                        printk(", host=%p, ldn=0x%x\n", shpnt, ldn);
 559                        if (ld(shpnt)[ldn].cmd) {
 560                                printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(shpnt)[ldn], ld(shpnt)[ldn].scb.u2.blk.count);
 561                                printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(shpnt)[ldn], ld(shpnt)[ldn].scb.u1.log_blk_adr);
 562                        }
 563                        printk(KERN_ERR "Reason given: %s\n", (cmd_result == IM_ADAPTER_HW_FAILURE) ? "HARDWARE FAILURE" : (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR) ? "SOFTWARE SEQUENCING ERROR" : (cmd_result == IM_CMD_ERROR) ? "COMMAND ERROR" : "UNKNOWN");
 564                        /* if errors appear, enter this section to give detailed info */
 565                        printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n");
 566                        printk(KERN_ERR "              Command Type................: %x\n", last_scsi_type(shpnt)[ldn]);
 567                        printk(KERN_ERR "              Attention Register..........: %x\n", inb(IM_ATTN_REG(shpnt)));
 568                        printk(KERN_ERR "              Basic Control Register......: %x\n", inb(IM_CTR_REG(shpnt)));
 569                        printk(KERN_ERR "              Interrupt Status Register...: %x\n", intr_reg);
 570                        printk(KERN_ERR "              Basic Status Register.......: %x\n", inb(IM_STAT_REG(shpnt)));
 571                        if ((last_scsi_type(shpnt)[ldn] == IM_SCB) || (last_scsi_type(shpnt)[ldn] == IM_LONG_SCB)) {
 572                                printk(KERN_ERR "              SCB-Command.................: %x\n", ld(shpnt)[ldn].scb.command);
 573                                printk(KERN_ERR "              SCB-Enable..................: %x\n", ld(shpnt)[ldn].scb.enable);
 574                                printk(KERN_ERR "              SCB-logical block address...: %lx\n", ld(shpnt)[ldn].scb.u1.log_blk_adr);
 575                                printk(KERN_ERR "              SCB-system buffer address...: %lx\n", ld(shpnt)[ldn].scb.sys_buf_adr);
 576                                printk(KERN_ERR "              SCB-system buffer length....: %lx\n", ld(shpnt)[ldn].scb.sys_buf_length);
 577                                printk(KERN_ERR "              SCB-tsb address.............: %lx\n", ld(shpnt)[ldn].scb.tsb_adr);
 578                                printk(KERN_ERR "              SCB-Chain address...........: %lx\n", ld(shpnt)[ldn].scb.scb_chain_adr);
 579                                printk(KERN_ERR "              SCB-block count.............: %x\n", ld(shpnt)[ldn].scb.u2.blk.count);
 580                                printk(KERN_ERR "              SCB-block length............: %x\n", ld(shpnt)[ldn].scb.u2.blk.length);
 581                        }
 582                        printk(KERN_ERR "              Send this report to the maintainer.\n");
 583                        panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result);
 584                        break;
 585                }
 586        } else {
 587                /* The command error handling is made silent, but we tell the
 588                 * calling function, that there is a reported error from the
 589                 * adapter. */
 590                switch (cmd_result) {
 591                case IM_ADAPTER_HW_FAILURE:
 592                case IM_SOFTWARE_SEQUENCING_ERROR:
 593                case IM_CMD_ERROR:
 594                        global_command_error_excuse = CMD_FAIL;
 595                        break;
 596                default:
 597                        global_command_error_excuse = 0;
 598                        break;
 599                }
 600        }
 601        /* if no panic appeared, increase the interrupt-counter */
 602        IBM_DS(shpnt).total_interrupts++;
 603        /*only for local checking phase */
 604        if (local_checking_phase_flag(shpnt)) {
 605                stat_result(shpnt) = cmd_result;
 606                got_interrupt(shpnt) = 1;
 607                reset_status(shpnt) = IM_RESET_FINISHED_OK;
 608                last_scsi_command(shpnt)[ldn] = NO_SCSI;
 609                spin_unlock_irqrestore(shpnt->host_lock, flags);
 610                return IRQ_HANDLED;
 611        }
 612        /* handling of commands coming from upper level of scsi driver */
 613        if (last_scsi_type(shpnt)[ldn] == IM_IMM_CMD) {
 614                /* verify ldn, and may handle rare reset immediate command */
 615                if ((reset_status(shpnt) == IM_RESET_IN_PROGRESS) && (last_scsi_command(shpnt)[ldn] == IM_RESET_IMM_CMD)) {
 616                        if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
 617                                disk_rw_in_progress = 0;
 618                                PS2_DISK_LED_OFF();
 619                                reset_status(shpnt) = IM_RESET_FINISHED_FAIL;
 620                        } else {
 621                                /*reset disk led counter, turn off disk led */
 622                                disk_rw_in_progress = 0;
 623                                PS2_DISK_LED_OFF();
 624                                reset_status(shpnt) = IM_RESET_FINISHED_OK;
 625                        }
 626                        stat_result(shpnt) = cmd_result;
 627                        last_scsi_command(shpnt)[ldn] = NO_SCSI;
 628                        last_scsi_type(shpnt)[ldn] = 0;
 629                        spin_unlock_irqrestore(shpnt->host_lock, flags);
 630                        return IRQ_HANDLED;
 631                } else if (last_scsi_command(shpnt)[ldn] == IM_ABORT_IMM_CMD) {
 632                        /* react on SCSI abort command */
 633#ifdef IM_DEBUG_PROBE
 634                        printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n");
 635#endif
 636                        disk_rw_in_progress = 0;
 637                        PS2_DISK_LED_OFF();
 638                        cmd = ld(shpnt)[ldn].cmd;
 639                        ld(shpnt)[ldn].cmd = NULL;
 640                        if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
 641                                cmd->result = DID_NO_CONNECT << 16;
 642                        else
 643                                cmd->result = DID_ABORT << 16;
 644                        stat_result(shpnt) = cmd_result;
 645                        last_scsi_command(shpnt)[ldn] = NO_SCSI;
 646                        last_scsi_type(shpnt)[ldn] = 0;
 647                        if (cmd->scsi_done)
 648                                (cmd->scsi_done) (cmd); /* should be the internal_done */
 649                        spin_unlock_irqrestore(shpnt->host_lock, flags);
 650                        return IRQ_HANDLED;
 651                } else {
 652                        disk_rw_in_progress = 0;
 653                        PS2_DISK_LED_OFF();
 654                        reset_status(shpnt) = IM_RESET_FINISHED_OK;
 655                        stat_result(shpnt) = cmd_result;
 656                        last_scsi_command(shpnt)[ldn] = NO_SCSI;
 657                        spin_unlock_irqrestore(shpnt->host_lock, flags);
 658                        return IRQ_HANDLED;
 659                }
 660        }
 661        last_scsi_command(shpnt)[ldn] = NO_SCSI;
 662        last_scsi_type(shpnt)[ldn] = 0;
 663        cmd = ld(shpnt)[ldn].cmd;
 664        ld(shpnt)[ldn].cmd = NULL;
 665#ifdef IM_DEBUG_TIMEOUT
 666        if (cmd) {
 667                if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) {
 668                        spin_unlock_irqsave(shpnt->host_lock, flags);
 669                        printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun);
 670                        return IRQ_HANDLED;
 671                }
 672        }
 673#endif
 674        /*if no command structure, just return, else clear cmd */
 675        if (!cmd)
 676        {
 677                spin_unlock_irqrestore(shpnt->host_lock, flags);
 678                return IRQ_HANDLED;
 679        }
 680
 681#ifdef IM_DEBUG_INT
 682        printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n", cmd->cmnd[0], intr_reg, ld(shpnt)[ldn].tsb.dev_status, ld(shpnt)[ldn].tsb.cmd_status, ld(shpnt)[ldn].tsb.dev_error, ld(shpnt)[ldn].tsb.cmd_error);
 683#endif
 684        /*if this is end of media read/write, may turn off PS/2 disk led */
 685        if ((ld(shpnt)[ldn].device_type != TYPE_NO_LUN) && (ld(shpnt)[ldn].device_type != TYPE_NO_DEVICE)) {
 686                /* only access this, if there was a valid device addressed */
 687                if (--disk_rw_in_progress == 0)
 688                        PS2_DISK_LED_OFF();
 689        }
 690
 691        /* IBM describes the status-mask to be 0x1e, but this is not conform
 692         * with SCSI-definition, I suppose, the reason for it is that IBM
 693         * adapters do not support CMD_TERMINATED, TASK_SET_FULL and
 694         * ACA_ACTIVE as returning statusbyte information. (ML) */
 695        if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
 696                cmd->result = (unsigned char) (ld(shpnt)[ldn].tsb.dev_status & 0x1e);
 697                IBM_DS(shpnt).total_errors++;
 698        } else
 699                cmd->result = 0;
 700        /* write device status into cmd->result, and call done function */
 701        if (lastSCSI == NO_SCSI) {      /* unexpected interrupt :-( */
 702                cmd->result |= DID_BAD_INTR << 16;
 703                printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n");
 704        } else                  /* things went right :-) */
 705                cmd->result |= DID_OK << 16;
 706        if (cmd->scsi_done)
 707                (cmd->scsi_done) (cmd);
 708        spin_unlock_irqrestore(shpnt->host_lock, flags);
 709        return IRQ_HANDLED;
 710}
 711
 712static void issue_cmd(struct Scsi_Host *shpnt, unsigned long cmd_reg,
 713                      unsigned char attn_reg)
 714{
 715        unsigned long flags;
 716        /* must wait for attention reg not busy */
 717        while (1) {
 718                spin_lock_irqsave(shpnt->host_lock, flags);
 719                if (!(inb(IM_STAT_REG(shpnt)) & IM_BUSY))
 720                        break;
 721                spin_unlock_irqrestore(shpnt->host_lock, flags);
 722        }
 723        /* write registers and enable system interrupts */
 724        outl(cmd_reg, IM_CMD_REG(shpnt));
 725        outb(attn_reg, IM_ATTN_REG(shpnt));
 726        spin_unlock_irqrestore(shpnt->host_lock, flags);
 727}
 728
 729static void internal_done(Scsi_Cmnd * cmd)
 730{
 731        cmd->SCp.Status++;
 732        return;
 733}
 734
 735/* SCSI-SCB-command for device_inquiry */
 736static int device_inquiry(struct Scsi_Host *shpnt, int ldn)
 737{
 738        int retr;
 739        struct im_scb *scb;
 740        struct im_tsb *tsb;
 741        unsigned char *buf;
 742
 743        scb = &(ld(shpnt)[ldn].scb);
 744        tsb = &(ld(shpnt)[ldn].tsb);
 745        buf = (unsigned char *) (&(ld(shpnt)[ldn].buf));
 746        ld(shpnt)[ldn].tsb.dev_status = 0;      /* prepare statusblock */
 747        for (retr = 0; retr < 3; retr++) {
 748                /* fill scb with inquiry command */
 749                scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT;
 750                scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
 751                last_scsi_command(shpnt)[ldn] = IM_DEVICE_INQUIRY_CMD;
 752                last_scsi_type(shpnt)[ldn] = IM_SCB;
 753                scb->sys_buf_adr = isa_virt_to_bus(buf);
 754                scb->sys_buf_length = 255;      /* maximum bufferlength gives max info */
 755                scb->tsb_adr = isa_virt_to_bus(tsb);
 756                /* issue scb to passed ldn, and busy wait for interrupt */
 757                got_interrupt(shpnt) = 0;
 758                issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | ldn);
 759                while (!got_interrupt(shpnt))
 760                        barrier();
 761
 762                /*if command successful, break */
 763                if ((stat_result(shpnt) == IM_SCB_CMD_COMPLETED) || (stat_result(shpnt) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
 764                        return 1;
 765        }
 766        /*if all three retries failed, return "no device at this ldn" */
 767        if (retr >= 3)
 768                return 0;
 769        else
 770                return 1;
 771}
 772
 773static int read_capacity(struct Scsi_Host *shpnt, int ldn)
 774{
 775        int retr;
 776        struct im_scb *scb;
 777        struct im_tsb *tsb;
 778        unsigned char *buf;
 779
 780        scb = &(ld(shpnt)[ldn].scb);
 781        tsb = &(ld(shpnt)[ldn].tsb);
 782        buf = (unsigned char *) (&(ld(shpnt)[ldn].buf));
 783        ld(shpnt)[ldn].tsb.dev_status = 0;
 784        for (retr = 0; retr < 3; retr++) {
 785                /*fill scb with read capacity command */
 786                scb->command = IM_READ_CAPACITY_CMD;
 787                scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
 788                last_scsi_command(shpnt)[ldn] = IM_READ_CAPACITY_CMD;
 789                last_scsi_type(shpnt)[ldn] = IM_SCB;
 790                scb->sys_buf_adr = isa_virt_to_bus(buf);
 791                scb->sys_buf_length = 8;
 792                scb->tsb_adr = isa_virt_to_bus(tsb);
 793                /*issue scb to passed ldn, and busy wait for interrupt */
 794                got_interrupt(shpnt) = 0;
 795                issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | ldn);
 796                while (!got_interrupt(shpnt))
 797                        barrier();
 798
 799                /*if got capacity, get block length and return one device found */
 800                if ((stat_result(shpnt) == IM_SCB_CMD_COMPLETED) || (stat_result(shpnt) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
 801                        return 1;
 802        }
 803        /*if all three retries failed, return "no device at this ldn" */
 804        if (retr >= 3)
 805                return 0;
 806        else
 807                return 1;
 808}
 809
 810static int get_pos_info(struct Scsi_Host *shpnt)
 811{
 812        int retr;
 813        struct im_scb *scb;
 814        struct im_tsb *tsb;
 815        unsigned char *buf;
 816
 817        scb = &(ld(shpnt)[MAX_LOG_DEV].scb);
 818        tsb = &(ld(shpnt)[MAX_LOG_DEV].tsb);
 819        buf = (unsigned char *) (&(ld(shpnt)[MAX_LOG_DEV].buf));
 820        ld(shpnt)[MAX_LOG_DEV].tsb.dev_status = 0;
 821        for (retr = 0; retr < 3; retr++) {
 822                /*fill scb with get_pos_info command */
 823                scb->command = IM_GET_POS_INFO_CMD;
 824                scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
 825                last_scsi_command(shpnt)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD;
 826                last_scsi_type(shpnt)[MAX_LOG_DEV] = IM_SCB;
 827                scb->sys_buf_adr = isa_virt_to_bus(buf);
 828                if (special(shpnt) == IBM_SCSI2_FW)
 829                        scb->sys_buf_length = 256;      /* get all info from F/W adapter */
 830                else
 831                        scb->sys_buf_length = 18;       /* get exactly 18 bytes for other SCSI */
 832                scb->tsb_adr = isa_virt_to_bus(tsb);
 833                /*issue scb to ldn=15, and busy wait for interrupt */
 834                got_interrupt(shpnt) = 0;
 835                issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
 836                
 837                /* FIXME: timeout */
 838                while (!got_interrupt(shpnt))
 839                        barrier();
 840
 841                /*if got POS-stuff, get block length and return one device found */
 842                if ((stat_result(shpnt) == IM_SCB_CMD_COMPLETED) || (stat_result(shpnt) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
 843                        return 1;
 844        }
 845        /* if all three retries failed, return "no device at this ldn" */
 846        if (retr >= 3)
 847                return 0;
 848        else
 849                return 1;
 850}
 851
 852/* SCSI-immediate-command for assign. This functions maps/unmaps specific
 853 ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
 854 subsystem and for dynamical remapping od ldns. */
 855static int immediate_assign(struct Scsi_Host *shpnt, unsigned int pun,
 856                            unsigned int lun, unsigned int ldn,
 857                            unsigned int operation)
 858{
 859        int retr;
 860        unsigned long imm_cmd;
 861
 862        for (retr = 0; retr < 3; retr++) {
 863                /* select mutation level of the SCSI-adapter */
 864                switch (special(shpnt)) {
 865                case IBM_SCSI2_FW:
 866                        imm_cmd = (unsigned long) (IM_ASSIGN_IMM_CMD);
 867                        imm_cmd |= (unsigned long) ((lun & 7) << 24);
 868                        imm_cmd |= (unsigned long) ((operation & 1) << 23);
 869                        imm_cmd |= (unsigned long) ((pun & 7) << 20) | ((pun & 8) << 24);
 870                        imm_cmd |= (unsigned long) ((ldn & 15) << 16);
 871                        break;
 872                default:
 873                        imm_cmd = inl(IM_CMD_REG(shpnt));
 874                        imm_cmd &= (unsigned long) (0xF8000000);        /* keep reserved bits */
 875                        imm_cmd |= (unsigned long) (IM_ASSIGN_IMM_CMD);
 876                        imm_cmd |= (unsigned long) ((lun & 7) << 24);
 877                        imm_cmd |= (unsigned long) ((operation & 1) << 23);
 878                        imm_cmd |= (unsigned long) ((pun & 7) << 20);
 879                        imm_cmd |= (unsigned long) ((ldn & 15) << 16);
 880                        break;
 881                }
 882                last_scsi_command(shpnt)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD;
 883                last_scsi_type(shpnt)[MAX_LOG_DEV] = IM_IMM_CMD;
 884                got_interrupt(shpnt) = 0;
 885                issue_cmd(shpnt, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
 886                while (!got_interrupt(shpnt))
 887                        barrier();
 888
 889                /*if command successful, break */
 890                if (stat_result(shpnt) == IM_IMMEDIATE_CMD_COMPLETED)
 891                        return 1;
 892        }
 893        if (retr >= 3)
 894                return 0;
 895        else
 896                return 1;
 897}
 898
 899static int immediate_feature(struct Scsi_Host *shpnt, unsigned int speed, unsigned int timeout)
 900{
 901        int retr;
 902        unsigned long imm_cmd;
 903
 904        for (retr = 0; retr < 3; retr++) {
 905                /* select mutation level of the SCSI-adapter */
 906                imm_cmd = IM_FEATURE_CTR_IMM_CMD;
 907                imm_cmd |= (unsigned long) ((speed & 0x7) << 29);
 908                imm_cmd |= (unsigned long) ((timeout & 0x1fff) << 16);
 909                last_scsi_command(shpnt)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD;
 910                last_scsi_type(shpnt)[MAX_LOG_DEV] = IM_IMM_CMD;
 911                got_interrupt(shpnt) = 0;
 912                /* we need to run into command errors in order to probe for the
 913                 * right speed! */
 914                global_command_error_excuse = 1;
 915                issue_cmd(shpnt, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
 916                
 917                /* FIXME: timeout */
 918                while (!got_interrupt(shpnt))
 919                        barrier();
 920                if (global_command_error_excuse == CMD_FAIL) {
 921                        global_command_error_excuse = 0;
 922                        return 2;
 923                } else
 924                        global_command_error_excuse = 0;
 925                /*if command successful, break */
 926                if (stat_result(shpnt) == IM_IMMEDIATE_CMD_COMPLETED)
 927                        return 1;
 928        }
 929        if (retr >= 3)
 930                return 0;
 931        else
 932                return 1;
 933}
 934
 935#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
 936static int immediate_reset(struct Scsi_Host *shpnt, unsigned int ldn)
 937{
 938        int retries;
 939        int ticks;
 940        unsigned long imm_command;
 941
 942        for (retries = 0; retries < 3; retries++) {
 943                imm_command = inl(IM_CMD_REG(shpnt));
 944                imm_command &= (unsigned long) (0xFFFF0000);    /* keep reserved bits */
 945                imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
 946                last_scsi_command(shpnt)[ldn] = IM_RESET_IMM_CMD;
 947                last_scsi_type(shpnt)[ldn] = IM_IMM_CMD;
 948                got_interrupt(shpnt) = 0;
 949                reset_status(shpnt) = IM_RESET_IN_PROGRESS;
 950                issue_cmd(shpnt, (unsigned long) (imm_command), IM_IMM_CMD | ldn);
 951                ticks = IM_RESET_DELAY * HZ;
 952                while (reset_status(shpnt) == IM_RESET_IN_PROGRESS && --ticks) {
 953                        udelay((1 + 999 / HZ) * 1000);
 954                        barrier();
 955                }
 956                /* if reset did not complete, just complain */
 957                if (!ticks) {
 958                        printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
 959                        reset_status(shpnt) = IM_RESET_FINISHED_OK;
 960                        /* did not work, finish */
 961                        return 1;
 962                }
 963                /*if command successful, break */
 964                if (stat_result(shpnt) == IM_IMMEDIATE_CMD_COMPLETED)
 965                        return 1;
 966        }
 967        if (retries >= 3)
 968                return 0;
 969        else
 970                return 1;
 971}
 972#endif
 973
 974/* type-interpreter for physical device numbers */
 975static char *ti_p(int dev)
 976{
 977        switch (dev) {
 978        case TYPE_IBM_SCSI_ADAPTER:
 979                return ("A");
 980        case TYPE_DISK:
 981                return ("D");
 982        case TYPE_TAPE:
 983                return ("T");
 984        case TYPE_PROCESSOR:
 985                return ("P");
 986        case TYPE_WORM:
 987                return ("W");
 988        case TYPE_ROM:
 989                return ("R");
 990        case TYPE_SCANNER:
 991                return ("S");
 992        case TYPE_MOD:
 993                return ("M");
 994        case TYPE_MEDIUM_CHANGER:
 995                return ("C");
 996        case TYPE_NO_LUN:
 997                return ("+");   /* show NO_LUN */
 998        }
 999        return ("-");           /* TYPE_NO_DEVICE and others */
1000}
1001
1002/* interpreter for logical device numbers (ldn) */
1003static char *ti_l(int val)
1004{
1005        const char hex[16] = "0123456789abcdef";
1006        static char answer[2];
1007
1008        answer[1] = (char) (0x0);
1009        if (val <= MAX_LOG_DEV)
1010                answer[0] = hex[val];
1011        else
1012                answer[0] = '-';
1013        return (char *) &answer;
1014}
1015
1016/* transfers bitpattern of the feature command to values in MHz */
1017static char *ibmrate(unsigned int speed, int i)
1018{
1019        switch (speed) {
1020        case 0:
1021                return i ? "5.00" : "10.00";
1022        case 1:
1023                return i ? "4.00" : "8.00";
1024        case 2:
1025                return i ? "3.33" : "6.66";
1026        case 3:
1027                return i ? "2.86" : "5.00";
1028        case 4:
1029                return i ? "2.50" : "4.00";
1030        case 5:
1031                return i ? "2.22" : "3.10";
1032        case 6:
1033                return i ? "2.00" : "2.50";
1034        case 7:
1035                return i ? "1.82" : "2.00";
1036        }
1037        return "---";
1038}
1039
1040static int probe_display(int what)
1041{
1042        static int rotator = 0;
1043        const char rotor[] = "|/-\\";
1044
1045        if (!(display_mode & LED_DISP))
1046                return 0;
1047        if (!what) {
1048                outl(0x20202020, MOD95_LED_PORT);
1049                outl(0x20202020, MOD95_LED_PORT + 4);
1050        } else {
1051                outb('S', MOD95_LED_PORT + 7);
1052                outb('C', MOD95_LED_PORT + 6);
1053                outb('S', MOD95_LED_PORT + 5);
1054                outb('I', MOD95_LED_PORT + 4);
1055                outb('i', MOD95_LED_PORT + 3);
1056                outb('n', MOD95_LED_PORT + 2);
1057                outb('i', MOD95_LED_PORT + 1);
1058                outb((char) (rotor[rotator]), MOD95_LED_PORT);
1059                rotator++;
1060                if (rotator > 3)
1061                        rotator = 0;
1062        }
1063        return 0;
1064}
1065
1066static int probe_bus_mode(struct Scsi_Host *shpnt)
1067{
1068        struct im_pos_info *info;
1069        int num_bus = 0;
1070        int ldn;
1071
1072        info = (struct im_pos_info *) (&(ld(shpnt)[MAX_LOG_DEV].buf));
1073        if (get_pos_info(shpnt)) {
1074                if (info->connector_size & 0xf000)
1075                        subsystem_connector_size(shpnt) = 16;
1076                else
1077                        subsystem_connector_size(shpnt) = 32;
1078                num_bus |= (info->pos_4b & 8) >> 3;
1079                for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1080                        if ((special(shpnt) == IBM_SCSI_WCACHE) || (special(shpnt) == IBM_7568_WCACHE)) {
1081                                if (!((info->cache_stat >> ldn) & 1))
1082                                        ld(shpnt)[ldn].cache_flag = 0;
1083                        }
1084                        if (!((info->retry_stat >> ldn) & 1))
1085                                ld(shpnt)[ldn].retry_flag = 0;
1086                }
1087#ifdef IM_DEBUG_PROBE
1088                printk("IBM MCA SCSI: SCSI-Cache bits: ");
1089                for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1090                        printk("%d", ld(shpnt)[ldn].cache_flag);
1091                }
1092                printk("\nIBM MCA SCSI: SCSI-Retry bits: ");
1093                for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1094                        printk("%d", ld(shpnt)[ldn].retry_flag);
1095                }
1096                printk("\n");
1097#endif
1098        }
1099        return num_bus;
1100}
1101
1102/* probing scsi devices */
1103static void check_devices(struct Scsi_Host *shpnt, int adaptertype)
1104{
1105        int id, lun, ldn, ticks;
1106        int count_devices;      /* local counter for connected device */
1107        int max_pun;
1108        int num_bus;
1109        int speedrun;           /* local adapter_speed check variable */
1110
1111        /* assign default values to certain variables */
1112        ticks = 0;
1113        count_devices = 0;
1114        IBM_DS(shpnt).dyn_flag = 0;     /* normally no need for dynamical ldn management */
1115        IBM_DS(shpnt).total_errors = 0; /* set errorcounter to 0 */
1116        next_ldn(shpnt) = 7;    /* next ldn to be assigned is 7, because 0-6 is 'hardwired' */
1117
1118        /* initialize the very important driver-informational arrays/structs */
1119        memset(ld(shpnt), 0, sizeof(ld(shpnt)));
1120        for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
1121                last_scsi_command(shpnt)[ldn] = NO_SCSI;        /* emptify last SCSI-command storage */
1122                last_scsi_type(shpnt)[ldn] = 0;
1123                ld(shpnt)[ldn].cache_flag = 1;
1124                ld(shpnt)[ldn].retry_flag = 1;
1125        }
1126        memset(get_ldn(shpnt), TYPE_NO_DEVICE, sizeof(get_ldn(shpnt))); /* this is essential ! */
1127        memset(get_scsi(shpnt), TYPE_NO_DEVICE, sizeof(get_scsi(shpnt)));       /* this is essential ! */
1128        for (lun = 0; lun < 8; lun++) {
1129                /* mark the adapter at its pun on all luns */
1130                get_scsi(shpnt)[subsystem_pun(shpnt)][lun] = TYPE_IBM_SCSI_ADAPTER;
1131                get_ldn(shpnt)[subsystem_pun(shpnt)][lun] = MAX_LOG_DEV;        /* make sure, the subsystem
1132                                                                                           ldn is active for all
1133                                                                                           luns. */
1134        }
1135        probe_display(0);       /* Supercool display usage during SCSI-probing. */
1136        /* This makes sense, when booting without any */
1137        /* monitor connected on model XX95. */
1138
1139        /* STEP 1: */
1140        adapter_speed(shpnt) = global_adapter_speed;
1141        speedrun = adapter_speed(shpnt);
1142        while (immediate_feature(shpnt, speedrun, adapter_timeout) == 2) {
1143                probe_display(1);
1144                if (speedrun == 7)
1145                        panic("IBM MCA SCSI: Cannot set Synchronous-Transfer-Rate!\n");
1146                speedrun++;
1147                if (speedrun > 7)
1148                        speedrun = 7;
1149        }
1150        adapter_speed(shpnt) = speedrun;
1151        /* Get detailed information about the current adapter, necessary for
1152         * device operations: */
1153        num_bus = probe_bus_mode(shpnt);
1154
1155        /* num_bus contains only valid data for the F/W adapter! */
1156        if (adaptertype == IBM_SCSI2_FW) {      /* F/W SCSI adapter: */
1157                /* F/W adapter PUN-space extension evaluation: */
1158                if (num_bus) {
1159                        printk(KERN_INFO "IBM MCA SCSI: Separate bus mode (wide-addressing enabled)\n");
1160                        subsystem_maxid(shpnt) = 16;
1161                } else {
1162                        printk(KERN_INFO "IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n");
1163                        subsystem_maxid(shpnt) = 8;
1164                }
1165                printk(KERN_INFO "IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n", ibmrate(speedrun, adaptertype));
1166        } else                  /* all other IBM SCSI adapters: */
1167                printk(KERN_INFO "IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun, adaptertype));
1168
1169        /* assign correct PUN device space */
1170        max_pun = subsystem_maxid(shpnt);
1171
1172#ifdef IM_DEBUG_PROBE
1173        printk("IBM MCA SCSI: Current SCSI-host index: %d\n", shpnt);
1174        printk("IBM MCA SCSI: Removing default logical SCSI-device mapping.");
1175#else
1176        printk(KERN_INFO "IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New");
1177#endif
1178        for (ldn = 0; ldn < MAX_LOG_DEV; ldn++) {
1179                probe_display(1);
1180#ifdef IM_DEBUG_PROBE
1181                printk(".");
1182#endif
1183                immediate_assign(shpnt, 0, 0, ldn, REMOVE_LDN); /* remove ldn (wherever) */
1184        }
1185        lun = 0;                /* default lun is 0 */
1186#ifndef IM_DEBUG_PROBE
1187        printk("cleared,");
1188#endif
1189        /* STEP 2: */
1190#ifdef IM_DEBUG_PROBE
1191        printk("\nIBM MCA SCSI: Scanning SCSI-devices.");
1192#endif
1193        for (id = 0; id < max_pun; id++)
1194#ifdef CONFIG_SCSI_MULTI_LUN
1195                for (lun = 0; lun < 8; lun++)
1196#endif
1197                {
1198                        probe_display(1);
1199#ifdef IM_DEBUG_PROBE
1200                        printk(".");
1201#endif
1202                        if (id != subsystem_pun(shpnt)) {
1203                                /* if pun is not the adapter: */
1204                                /* set ldn=0 to pun,lun */
1205                                immediate_assign(shpnt, id, lun, PROBE_LDN, SET_LDN);
1206                                if (device_inquiry(shpnt, PROBE_LDN)) { /* probe device */
1207                                        get_scsi(shpnt)[id][lun] = (unsigned char) (ld(shpnt)[PROBE_LDN].buf[0]);
1208                                        /* entry, even for NO_LUN */
1209                                        if (ld(shpnt)[PROBE_LDN].buf[0] != TYPE_NO_LUN)
1210                                                count_devices++;        /* a existing device is found */
1211                                }
1212                                /* remove ldn */
1213                                immediate_assign(shpnt, id, lun, PROBE_LDN, REMOVE_LDN);
1214                        }
1215                }
1216#ifndef IM_DEBUG_PROBE
1217        printk("scanned,");
1218#endif
1219        /* STEP 3: */
1220#ifdef IM_DEBUG_PROBE
1221        printk("\nIBM MCA SCSI: Mapping SCSI-devices.");
1222#endif
1223        ldn = 0;
1224        lun = 0;
1225#ifdef CONFIG_SCSI_MULTI_LUN
1226        for (lun = 0; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1227#endif
1228                for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1229                        probe_display(1);
1230#ifdef IM_DEBUG_PROBE
1231                        printk(".");
1232#endif
1233                        if (id != subsystem_pun(shpnt)) {
1234                                if (get_scsi(shpnt)[id][lun] != TYPE_NO_LUN && get_scsi(shpnt)[id][lun] != TYPE_NO_DEVICE) {
1235                                        /* Only map if accepted type. Always enter for
1236                                           lun == 0 to get no gaps into ldn-mapping for ldn<7. */
1237                                        immediate_assign(shpnt, id, lun, ldn, SET_LDN);
1238                                        get_ldn(shpnt)[id][lun] = ldn;  /* map ldn */
1239                                        if (device_exists(shpnt, ldn, &ld(shpnt)[ldn].block_length, &ld(shpnt)[ldn].device_type)) {
1240#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
1241                                                printk("resetting device at ldn=%x ... ", ldn);
1242                                                immediate_reset(shpnt, ldn);
1243#endif
1244                                                ldn++;
1245                                        } else {
1246                                                /* device vanished, probably because we don't know how to
1247                                                 * handle it or because it has problems */
1248                                                if (lun > 0) {
1249                                                        /* remove mapping */
1250                                                        get_ldn(shpnt)[id][lun] = TYPE_NO_DEVICE;
1251                                                        immediate_assign(shpnt, 0, 0, ldn, REMOVE_LDN);
1252                                                } else
1253                                                        ldn++;
1254                                        }
1255                                } else if (lun == 0) {
1256                                        /* map lun == 0, even if no device exists */
1257                                        immediate_assign(shpnt, id, lun, ldn, SET_LDN);
1258                                        get_ldn(shpnt)[id][lun] = ldn;  /* map ldn */
1259                                        ldn++;
1260                                }
1261                        }
1262                }
1263        /* STEP 4: */
1264
1265        /* map remaining ldns to non-existing devices */
1266        for (lun = 1; lun < 8 && ldn < MAX_LOG_DEV; lun++)
1267                for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
1268                        if (get_scsi(shpnt)[id][lun] == TYPE_NO_LUN || get_scsi(shpnt)[id][lun] == TYPE_NO_DEVICE) {
1269                                probe_display(1);
1270                                /* Map remaining ldns only to NON-existing pun,lun
1271                                   combinations to make sure an inquiry will fail.
1272                                   For MULTI_LUN, it is needed to avoid adapter autonome
1273                                   SCSI-remapping. */
1274                                immediate_assign(shpnt, id, lun, ldn, SET_LDN);
1275                                get_ldn(shpnt)[id][lun] = ldn;
1276                                ldn++;
1277                        }
1278                }
1279#ifndef IM_DEBUG_PROBE
1280        printk("mapped.");
1281#endif
1282        printk("\n");
1283#ifdef IM_DEBUG_PROBE
1284        if (ibm_ansi_order)
1285                printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n");
1286        else
1287                printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n");
1288#endif
1289
1290#ifdef IM_DEBUG_PROBE
1291        /* Show the physical and logical mapping during boot. */
1292        printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n");
1293        printk("    Physical SCSI-Device Map               Logical SCSI-Device Map\n");
1294        printk("ID\\LUN  0  1  2  3  4  5  6  7       ID\\LUN  0  1  2  3  4  5  6  7\n");
1295        for (id = 0; id < max_pun; id++) {
1296                printk("%2d     ", id);
1297                for (lun = 0; lun < 8; lun++)
1298                        printk("%2s ", ti_p(get_scsi(shpnt)[id][lun]));
1299                printk("      %2d     ", id);
1300                for (lun = 0; lun < 8; lun++)
1301                        printk("%2s ", ti_l(get_ldn(shpnt)[id][lun]));
1302                printk("\n");
1303        }
1304#endif
1305
1306        /* assign total number of found SCSI-devices to the statistics struct */
1307        IBM_DS(shpnt).total_scsi_devices = count_devices;
1308
1309        /* decide for output in /proc-filesystem, if the configuration of
1310           SCSI-devices makes dynamical reassignment of devices necessary */
1311        if (count_devices >= MAX_LOG_DEV)
1312                IBM_DS(shpnt).dyn_flag = 1;     /* dynamical assignment is necessary */
1313        else
1314                IBM_DS(shpnt).dyn_flag = 0;     /* dynamical assignment is not necessary */
1315
1316        /* If no SCSI-devices are assigned, return 1 in order to cause message. */
1317        if (ldn == 0)
1318                printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n");
1319
1320        /* reset the counters for statistics on the current adapter */
1321        IBM_DS(shpnt).scbs = 0;
1322        IBM_DS(shpnt).long_scbs = 0;
1323        IBM_DS(shpnt).total_accesses = 0;
1324        IBM_DS(shpnt).total_interrupts = 0;
1325        IBM_DS(shpnt).dynamical_assignments = 0;
1326        memset(IBM_DS(shpnt).ldn_access, 0x0, sizeof(IBM_DS(shpnt).ldn_access));
1327        memset(IBM_DS(shpnt).ldn_read_access, 0x0, sizeof(IBM_DS(shpnt).ldn_read_access));
1328        memset(IBM_DS(shpnt).ldn_write_access, 0x0, sizeof(IBM_DS(shpnt).ldn_write_access));
1329        memset(IBM_DS(shpnt).ldn_inquiry_access, 0x0, sizeof(IBM_DS(shpnt).ldn_inquiry_access));
1330        memset(IBM_DS(shpnt).ldn_modeselect_access, 0x0, sizeof(IBM_DS(shpnt).ldn_modeselect_access));
1331        memset(IBM_DS(shpnt).ldn_assignments, 0x0, sizeof(IBM_DS(shpnt).ldn_assignments));
1332        probe_display(0);
1333        return;
1334}
1335
1336static int device_exists(struct Scsi_Host *shpnt, int ldn, int *block_length, int *device_type)
1337{
1338        unsigned char *buf;
1339        /* if no valid device found, return immediately with 0 */
1340        if (!(device_inquiry(shpnt, ldn)))
1341                return 0;
1342        buf = (unsigned char *) (&(ld(shpnt)[ldn].buf));
1343        if (*buf == TYPE_ROM) {
1344                *device_type = TYPE_ROM;
1345                *block_length = 2048;   /* (standard blocksize for yellow-/red-book) */
1346                return 1;
1347        }
1348        if (*buf == TYPE_WORM) {
1349                *device_type = TYPE_WORM;
1350                *block_length = 2048;
1351                return 1;
1352        }
1353        if (*buf == TYPE_DISK) {
1354                *device_type = TYPE_DISK;
1355                if (read_capacity(shpnt, ldn)) {
1356                        *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1357                        return 1;
1358                } else
1359                        return 0;
1360        }
1361        if (*buf == TYPE_MOD) {
1362                *device_type = TYPE_MOD;
1363                if (read_capacity(shpnt, ldn)) {
1364                        *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
1365                        return 1;
1366                } else
1367                        return 0;
1368        }
1369        if (*buf == TYPE_TAPE) {
1370                *device_type = TYPE_TAPE;
1371                *block_length = 0;      /* not in use (setting by mt and mtst in op.) */
1372                return 1;
1373        }
1374        if (*buf == TYPE_PROCESSOR) {
1375                *device_type = TYPE_PROCESSOR;
1376                *block_length = 0;      /* they set their stuff on drivers */
1377                return 1;
1378        }
1379        if (*buf == TYPE_SCANNER) {
1380                *device_type = TYPE_SCANNER;
1381                *block_length = 0;      /* they set their stuff on drivers */
1382                return 1;
1383        }
1384        if (*buf == TYPE_MEDIUM_CHANGER) {
1385                *device_type = TYPE_MEDIUM_CHANGER;
1386                *block_length = 0;      /* One never knows, what to expect on a medium
1387                                           changer device. */
1388                return 1;
1389        }
1390        return 0;
1391}
1392
1393static void internal_ibmmca_scsi_setup(char *str, int *ints)
1394{
1395        int i, j, io_base, id_base;
1396        char *token;
1397
1398        io_base = 0;
1399        id_base = 0;
1400        if (str) {
1401                j = 0;
1402                while ((token = strsep(&str, ",")) != NULL) {
1403                        if (!strcmp(token, "activity"))
1404                                display_mode |= LED_ACTIVITY;
1405                        if (!strcmp(token, "display"))
1406                                display_mode |= LED_DISP;
1407                        if (!strcmp(token, "adisplay"))
1408                                display_mode |= LED_ADISP;
1409                        if (!strcmp(token, "normal"))
1410                                ibm_ansi_order = 0;
1411                        if (!strcmp(token, "ansi"))
1412                                ibm_ansi_order = 1;
1413                        if (!strcmp(token, "fast"))
1414                                global_adapter_speed = 0;
1415                        if (!strcmp(token, "medium"))
1416                                global_adapter_speed = 4;
1417                        if (!strcmp(token, "slow"))
1418                                global_adapter_speed = 7;
1419                        if ((*token == '-') || (isdigit(*token))) {
1420                                if (!(j % 2) && (io_base < IM_MAX_HOSTS))
1421                                        io_port[io_base++] = simple_strtoul(token, NULL, 0);
1422                                if ((j % 2) && (id_base < IM_MAX_HOSTS))
1423                                        scsi_id[id_base++] = simple_strtoul(token, NULL, 0);
1424                                j++;
1425                        }
1426                }
1427        } else if (ints) {
1428                for (i = 0; i < IM_MAX_HOSTS && 2 * i + 2 < ints[0]; i++) {
1429                        io_port[i] = ints[2 * i + 2];
1430                        scsi_id[i] = ints[2 * i + 2];
1431                }
1432        }
1433        return;
1434}
1435
1436#if 0
1437 FIXME NEED TO MOVE TO SYSFS
1438
1439static int ibmmca_getinfo(char *buf, int slot, void *dev_id)
1440{
1441        struct Scsi_Host *shpnt;
1442        int len, speciale, connectore, k;
1443        unsigned int pos[8];
1444        unsigned long flags;
1445        struct Scsi_Host *dev = dev_id;
1446
1447        spin_lock_irqsave(dev->host_lock, flags);
1448
1449        shpnt = dev;            /* assign host-structure to local pointer */
1450        len = 0;                /* set filled text-buffer index to 0 */
1451        /* get the _special contents of the hostdata structure */
1452        speciale = ((struct ibmmca_hostdata *) shpnt->hostdata)->_special;
1453        connectore = ((struct ibmmca_hostdata *) shpnt->hostdata)->_connector_size;
1454        for (k = 2; k < 4; k++)
1455                pos[k] = ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k];
1456        if (speciale == FORCED_DETECTION) {     /* forced detection */
1457                len += sprintf(buf + len,
1458                               "Adapter category: forced detected\n" "***************************************\n" "***  Forced detected SCSI Adapter   ***\n" "***  No chip-information available  ***\n" "***************************************\n");
1459        } else if (speciale == INTEGRATED_SCSI) {
1460                /* if the integrated subsystem has been found automatically: */
1461                len += sprintf(buf + len,
1462                               "Adapter category: integrated\n" "Chip revision level: %d\n" "Chip status: %s\n" "8 kByte NVRAM status: %s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 1) ? "enabled" : "disabled", (pos[2] & 2) ? "locked" : "accessible");
1463        } else if ((speciale >= 0) && (speciale < ARRAY_SIZE(subsys_list))) {
1464                /* if the subsystem is a slot adapter */
1465                len += sprintf(buf + len, "Adapter category: slot-card\n" "ROM Segment Address: ");
1466                if ((pos[2] & 0xf0) == 0xf0)
1467                        len += sprintf(buf + len, "off\n");
1468                else
1469                        len += sprintf(buf + len, "0x%x\n", ((pos[2] & 0xf0) << 13) + 0xc0000);
1470                len += sprintf(buf + len, "Chip status: %s\n", (pos[2] & 1) ? "enabled" : "disabled");
1471                len += sprintf(buf + len, "Adapter I/O Offset: 0x%x\n", ((pos[2] & 0x0e) << 2));
1472        } else {
1473                len += sprintf(buf + len, "Adapter category: unknown\n");
1474        }
1475        /* common subsystem information to write to the slotn file */
1476        len += sprintf(buf + len, "Subsystem PUN: %d\n", shpnt->this_id);
1477        len += sprintf(buf + len, "I/O base address range: 0x%x-0x%x\n", (unsigned int) (shpnt->io_port), (unsigned int) (shpnt->io_port + 7));
1478        len += sprintf(buf + len, "MCA-slot size: %d bits", connectore);
1479        /* Now make sure, the bufferlength is devidable by 4 to avoid
1480         * paging problems of the buffer. */
1481        while (len % sizeof(int) != (sizeof(int) - 1))
1482                len += sprintf(buf + len, " ");
1483        len += sprintf(buf + len, "\n");
1484
1485        spin_unlock_irqrestore(shpnt->host_lock, flags);
1486
1487        return len;
1488}
1489#endif
1490
1491static struct scsi_host_template ibmmca_driver_template = {
1492          .proc_name      = "ibmmca",
1493          .proc_info      = ibmmca_proc_info,
1494          .name           = "IBM SCSI-Subsystem",
1495          .queuecommand   = ibmmca_queuecommand,
1496          .eh_abort_handler = ibmmca_abort,
1497          .eh_host_reset_handler = ibmmca_host_reset,
1498          .bios_param     = ibmmca_biosparam,
1499          .can_queue      = 16,
1500          .this_id        = 7,
1501          .sg_tablesize   = 16,
1502          .cmd_per_lun    = 1,
1503          .use_clustering = ENABLE_CLUSTERING,
1504};
1505
1506static int ibmmca_probe(struct device *dev)
1507{
1508        struct Scsi_Host *shpnt;
1509        int port, id, i, j, k, irq, enabled, ret = -EINVAL;
1510        struct mca_device *mca_dev = to_mca_device(dev);
1511        const char *description = ibmmca_description[mca_dev->index];
1512
1513        /* First of all, print the version number of the driver. This is
1514         * important to allow better user bugreports in case of already
1515         * having problems with the MCA_bus probing. */
1516        printk(KERN_INFO "IBM MCA SCSI: Version %s\n", IBMMCA_SCSI_DRIVER_VERSION);
1517        /* The POS2-register of all PS/2 model SCSI-subsystems has the following
1518         * interpretation of bits:
1519         *                             Bit 7 - 4 : Chip Revision ID (Release)
1520         *                             Bit 3 - 2 : Reserved
1521         *                             Bit 1     : 8k NVRAM Disabled
1522         *                             Bit 0     : Chip Enable (EN-Signal)
1523         * The POS3-register is interpreted as follows:
1524         *                             Bit 7 - 5 : SCSI ID
1525         *                             Bit 4     : Reserved = 0
1526         *                             Bit 3 - 0 : Reserved = 0
1527         * (taken from "IBM, PS/2 Hardware Interface Technical Reference, Common
1528         * Interfaces (1991)").
1529         * In short words, this means, that IBM PS/2 machines only support
1530         * 1 single subsystem by default. The slot-adapters must have another
1531         * configuration on pos2. Here, one has to assume the following
1532         * things for POS2-register:
1533         *                             Bit 7 - 4 : Chip Revision ID (Release)
1534         *                             Bit 3 - 1 : port offset factor
1535         *                             Bit 0     : Chip Enable (EN-Signal)
1536         * As I found a patch here, setting the IO-registers to 0x3540 forced,
1537         * as there was a 0x05 in POS2 on a model 56, I assume, that the
1538         * port 0x3540 must be fix for integrated SCSI-controllers.
1539         * Ok, this discovery leads to the following implementation: (M.Lang) */
1540
1541        /* first look for the IBM SCSI integrated subsystem on the motherboard */
1542        for (j = 0; j < 8; j++) /* read the pos-information */
1543                pos[j] = mca_device_read_pos(mca_dev, j);
1544        id = (pos[3] & 0xe0) >> 5; /* this is correct and represents the PUN */
1545        enabled = (pos[2] &0x01);
1546        if (!enabled) {
1547                printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
1548                printk(KERN_WARNING "              SCSI-operations may not work.\n");
1549        }
1550
1551        /* pos2 = pos3 = 0xff if there is no integrated SCSI-subsystem present, but
1552         * if we ignore the settings of all surrounding pos registers, it is not
1553         * completely sufficient to only check pos2 and pos3. */
1554        /* Therefore, now the following if statement is used to
1555         * make sure, we see a real integrated onboard SCSI-interface and no
1556         * internal system information, which gets mapped to some pos registers
1557         * on models 95xx. */
1558        if (mca_dev->slot == MCA_INTEGSCSI &&
1559            ((!pos[0] && !pos[1] && pos[2] > 0 &&
1560              pos[3] > 0 && !pos[4] && !pos[5] &&
1561              !pos[6] && !pos[7]) ||
1562             (pos[0] == 0xff && pos[1] == 0xff &&
1563              pos[2] < 0xff && pos[3] < 0xff &&
1564              pos[4] == 0xff && pos[5] == 0xff &&
1565              pos[6] == 0xff && pos[7] == 0xff))) {
1566                irq = IM_IRQ;
1567                port = IM_IO_PORT;
1568        } else {
1569                irq = IM_IRQ;
1570                port = IM_IO_PORT + ((pos[2] &0x0e) << 2);
1571                if ((mca_dev->index == IBM_SCSI2_FW) && (pos[6] != 0)) {
1572                        printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
1573                        printk(KERN_ERR "              Impossible to determine adapter PUN!\n");
1574                        printk(KERN_ERR "              Guessing adapter PUN = 7.\n");
1575                        id = 7;
1576                } else {
1577                        id = (pos[3] & 0xe0) >> 5;      /* get subsystem PUN */
1578                        if (mca_dev->index == IBM_SCSI2_FW) {
1579                                id |= (pos[3] & 0x10) >> 1;     /* get subsystem PUN high-bit
1580                                                                 * for F/W adapters */
1581                        }
1582                }
1583                if ((mca_dev->index == IBM_SCSI2_FW) &&
1584                    (pos[4] & 0x01) && (pos[6] == 0)) {
1585                        /* IRQ11 is used by SCSI-2 F/W Adapter/A */
1586                        printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
1587                        irq = IM_IRQ_FW;
1588                }
1589        }
1590
1591
1592
1593        /* give detailed information on the subsystem. This helps me
1594         * additionally during debugging and analyzing bug-reports. */
1595        printk(KERN_INFO "IBM MCA SCSI: %s found, io=0x%x, scsi id=%d,\n",
1596               description, port, id);
1597        if (mca_dev->slot == MCA_INTEGSCSI)
1598                printk(KERN_INFO "              chip rev.=%d, 8K NVRAM=%s, subsystem=%s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 2) ? "locked" : "accessible", (pos[2] & 1) ? "enabled." : "disabled.");
1599        else {
1600                if ((pos[2] & 0xf0) == 0xf0)
1601                        printk(KERN_DEBUG "              ROM Addr.=off,");
1602                else
1603                        printk(KERN_DEBUG "              ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
1604
1605                printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
1606        }
1607
1608        /* check I/O region */
1609        if (!request_region(port, IM_N_IO_PORT, description)) {
1610                printk(KERN_ERR "IBM MCA SCSI: Unable to get I/O region 0x%x-0x%x (%d ports).\n", port, port + IM_N_IO_PORT - 1, IM_N_IO_PORT);
1611                goto out_fail;
1612        }
1613
1614        /* register host */
1615        shpnt = scsi_host_alloc(&ibmmca_driver_template,
1616                                sizeof(struct ibmmca_hostdata));
1617        if (!shpnt) {
1618                printk(KERN_ERR "IBM MCA SCSI: Unable to register host.\n");
1619                goto out_release;
1620        }
1621
1622        dev_set_drvdata(dev, shpnt);
1623        if(request_irq(irq, interrupt_handler, IRQF_SHARED, description, dev)) {
1624                printk(KERN_ERR "IBM MCA SCSI: failed to request interrupt %d\n", irq);
1625                goto out_free_host;
1626        }
1627
1628        /* request I/O region */
1629        special(shpnt) = mca_dev->index;        /* important assignment or else crash! */
1630        subsystem_connector_size(shpnt) = 0;    /* preset slot-size */
1631        shpnt->irq = irq;       /* assign necessary stuff for the adapter */
1632        shpnt->io_port = port;
1633        shpnt->n_io_port = IM_N_IO_PORT;
1634        shpnt->this_id = id;
1635        shpnt->max_id = 8;      /* 8 PUNs are default */
1636        /* now, the SCSI-subsystem is connected to Linux */
1637
1638#ifdef IM_DEBUG_PROBE
1639        ctrl = (unsigned int) (inb(IM_CTR_REG(found))); /* get control-register status */
1640        printk("IBM MCA SCSI: Control Register contents: %x, status: %x\n", ctrl, inb(IM_STAT_REG(found)));
1641        printk("IBM MCA SCSI: This adapters' POS-registers: ");
1642        for (i = 0; i < 8; i++)
1643                printk("%x ", pos[i]);
1644        printk("\n");
1645#endif
1646        reset_status(shpnt) = IM_RESET_NOT_IN_PROGRESS;
1647
1648        for (i = 0; i < 16; i++)        /* reset the tables */
1649                for (j = 0; j < 8; j++)
1650                        get_ldn(shpnt)[i][j] = MAX_LOG_DEV;
1651
1652        /* check which logical devices exist */
1653        /* after this line, local interrupting is possible: */
1654        local_checking_phase_flag(shpnt) = 1;
1655        check_devices(shpnt, mca_dev->index);   /* call by value, using the global variable hosts */
1656        local_checking_phase_flag(shpnt) = 0;
1657
1658        /* an ibm mca subsystem has been detected */
1659
1660        for (k = 2; k < 7; k++)
1661                ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
1662        ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = INTEGRATED_SCSI;
1663        mca_device_set_name(mca_dev, description);
1664        /* FIXME: NEED TO REPLUMB TO SYSFS
1665           mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
1666        */
1667        mca_device_set_claim(mca_dev, 1);
1668        if (scsi_add_host(shpnt, dev)) {
1669                dev_printk(KERN_ERR, dev, "IBM MCA SCSI: scsi_add_host failed\n");
1670                goto out_free_host;
1671        }
1672        scsi_scan_host(shpnt);
1673
1674        return 0;
1675 out_free_host:
1676        scsi_host_put(shpnt);
1677 out_release:
1678        release_region(port, IM_N_IO_PORT);
1679 out_fail:
1680        return ret;
1681}
1682
1683static int __devexit ibmmca_remove(struct device *dev)
1684{
1685        struct Scsi_Host *shpnt = dev_get_drvdata(dev);
1686        scsi_remove_host(shpnt);
1687        release_region(shpnt->io_port, shpnt->n_io_port);
1688        free_irq(shpnt->irq, dev);
1689        scsi_host_put(shpnt);
1690        return 0;
1691}
1692
1693/* The following routine is the SCSI command queue for the midlevel driver */
1694static int ibmmca_queuecommand_lck(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
1695{
1696        unsigned int ldn;
1697        unsigned int scsi_cmd;
1698        struct im_scb *scb;
1699        struct Scsi_Host *shpnt;
1700        int current_ldn;
1701        int id, lun;
1702        int target;
1703        int max_pun;
1704        int i;
1705        struct scatterlist *sg;
1706
1707        shpnt = cmd->device->host;
1708
1709        max_pun = subsystem_maxid(shpnt);
1710        if (ibm_ansi_order) {
1711                target = max_pun - 1 - cmd->device->id;
1712                if ((target <= subsystem_pun(shpnt)) && (cmd->device->id <= subsystem_pun(shpnt)))
1713                        target--;
1714                else if ((target >= subsystem_pun(shpnt)) && (cmd->device->id >= subsystem_pun(shpnt)))
1715                        target++;
1716        } else
1717                target = cmd->device->id;
1718
1719        /* if (target,lun) is NO LUN or not existing at all, return error */
1720        if ((get_scsi(shpnt)[target][cmd->device->lun] == TYPE_NO_LUN) || (get_scsi(shpnt)[target][cmd->device->lun] == TYPE_NO_DEVICE)) {
1721                cmd->result = DID_NO_CONNECT << 16;
1722                if (done)
1723                        done(cmd);
1724                return 0;
1725        }
1726
1727        /*if (target,lun) unassigned, do further checks... */
1728        ldn = get_ldn(shpnt)[target][cmd->device->lun];
1729        if (ldn >= MAX_LOG_DEV) {       /* on invalid ldn do special stuff */
1730                if (ldn > MAX_LOG_DEV) {        /* dynamical remapping if ldn unassigned */
1731                        current_ldn = next_ldn(shpnt);  /* stop-value for one circle */
1732                        while (ld(shpnt)[next_ldn(shpnt)].cmd) {        /* search for a occupied, but not in */
1733                                /* command-processing ldn. */
1734                                next_ldn(shpnt)++;
1735                                if (next_ldn(shpnt) >= MAX_LOG_DEV)
1736                                        next_ldn(shpnt) = 7;
1737                                if (current_ldn == next_ldn(shpnt)) {   /* One circle done ? */
1738                                        /* no non-processing ldn found */
1739                                        scmd_printk(KERN_WARNING, cmd,
1740        "IBM MCA SCSI: Cannot assign SCSI-device dynamically!\n"
1741        "              On ldn 7-14 SCSI-commands everywhere in progress.\n"
1742        "              Reporting DID_NO_CONNECT for device.\n");
1743                                        cmd->result = DID_NO_CONNECT << 16;     /* return no connect */
1744                                        if (done)
1745                                                done(cmd);
1746                                        return 0;
1747                                }
1748                        }
1749
1750                        /* unmap non-processing ldn */
1751                        for (id = 0; id < max_pun; id++)
1752                                for (lun = 0; lun < 8; lun++) {
1753                                        if (get_ldn(shpnt)[id][lun] == next_ldn(shpnt)) {
1754                                                get_ldn(shpnt)[id][lun] = TYPE_NO_DEVICE;
1755                                                get_scsi(shpnt)[id][lun] = TYPE_NO_DEVICE;
1756                                                /* unmap entry */
1757                                        }
1758                                }
1759                        /* set reduced interrupt_handler-mode for checking */
1760                        local_checking_phase_flag(shpnt) = 1;
1761                        /* map found ldn to pun,lun */
1762                        get_ldn(shpnt)[target][cmd->device->lun] = next_ldn(shpnt);
1763                        /* change ldn to the right value, that is now next_ldn */
1764                        ldn = next_ldn(shpnt);
1765                        /* unassign all ldns (pun,lun,ldn does not matter for remove) */
1766                        immediate_assign(shpnt, 0, 0, 0, REMOVE_LDN);
1767                        /* set only LDN for remapped device */
1768                        immediate_assign(shpnt, target, cmd->device->lun, ldn, SET_LDN);
1769                        /* get device information for ld[ldn] */
1770                        if (device_exists(shpnt, ldn, &ld(shpnt)[ldn].block_length, &ld(shpnt)[ldn].device_type)) {
1771                                ld(shpnt)[ldn].cmd = NULL;      /* To prevent panic set 0, because
1772                                                                   devices that were not assigned,
1773                                                                   should have nothing in progress. */
1774                                get_scsi(shpnt)[target][cmd->device->lun] = ld(shpnt)[ldn].device_type;
1775                                /* increase assignment counters for statistics in /proc */
1776                                IBM_DS(shpnt).dynamical_assignments++;
1777                                IBM_DS(shpnt).ldn_assignments[ldn]++;
1778                        } else
1779                                /* panic here, because a device, found at boottime has
1780                                   vanished */
1781                                panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n", ldn, target, cmd->device->lun);
1782                        /* unassign again all ldns (pun,lun,ldn does not matter for remove) */
1783                        immediate_assign(shpnt, 0, 0, 0, REMOVE_LDN);
1784                        /* remap all ldns, as written in the pun/lun table */
1785                        lun = 0;
1786#ifdef CONFIG_SCSI_MULTI_LUN
1787                        for (lun = 0; lun < 8; lun++)
1788#endif
1789                                for (id = 0; id < max_pun; id++) {
1790                                        if (get_ldn(shpnt)[id][lun] <= MAX_LOG_DEV)
1791                                                immediate_assign(shpnt, id, lun, get_ldn(shpnt)[id][lun], SET_LDN);
1792                                }
1793                        /* set back to normal interrupt_handling */
1794                        local_checking_phase_flag(shpnt) = 0;
1795#ifdef IM_DEBUG_PROBE
1796                        /* Information on syslog terminal */
1797                        printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n", ldn, target, cmd->device->lun);
1798#endif
1799                        /* increase next_ldn for next dynamical assignment */
1800                        next_ldn(shpnt)++;
1801                        if (next_ldn(shpnt) >= MAX_LOG_DEV)
1802                                next_ldn(shpnt) = 7;
1803                } else {        /* wall against Linux accesses to the subsystem adapter */
1804                        cmd->result = DID_BAD_TARGET << 16;
1805                        if (done)
1806                                done(cmd);
1807                        return 0;
1808                }
1809        }
1810
1811        /*verify there is no command already in progress for this log dev */
1812        if (ld(shpnt)[ldn].cmd)
1813                panic("IBM MCA SCSI: cmd already in progress for this ldn.\n");
1814
1815        /*save done in cmd, and save cmd for the interrupt handler */
1816        cmd->scsi_done = done;
1817        ld(shpnt)[ldn].cmd = cmd;
1818
1819        /*fill scb information independent of the scsi command */
1820        scb = &(ld(shpnt)[ldn].scb);
1821        ld(shpnt)[ldn].tsb.dev_status = 0;
1822        scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE;
1823        scb->tsb_adr = isa_virt_to_bus(&(ld(shpnt)[ldn].tsb));
1824        scsi_cmd = cmd->cmnd[0];
1825
1826        if (scsi_sg_count(cmd)) {
1827                BUG_ON(scsi_sg_count(cmd) > 16);
1828
1829                scsi_for_each_sg(cmd, sg, scsi_sg_count(cmd), i) {
1830                        ld(shpnt)[ldn].sge[i].address = (void *) (isa_page_to_bus(sg_page(sg)) + sg->offset);
1831                        ld(shpnt)[ldn].sge[i].byte_length = sg->length;
1832                }
1833                scb->enable |= IM_POINTER_TO_LIST;
1834                scb->sys_buf_adr = isa_virt_to_bus(&(ld(shpnt)[ldn].sge[0]));
1835                scb->sys_buf_length = scsi_sg_count(cmd) * sizeof(struct im_sge);
1836        } else {
1837                scb->sys_buf_adr = isa_virt_to_bus(scsi_sglist(cmd));
1838                /* recent Linux midlevel SCSI places 1024 byte for inquiry
1839                 * command. Far too much for old PS/2 hardware. */
1840                switch (scsi_cmd) {
1841                        /* avoid command errors by setting bufferlengths to
1842                         * ANSI-standard. Beware of forcing it to 255,
1843                         * this could SEGV the kernel!!! */
1844                case INQUIRY:
1845                case REQUEST_SENSE:
1846                case MODE_SENSE:
1847                case MODE_SELECT:
1848                        if (scsi_bufflen(cmd) > 255)
1849                                scb->sys_buf_length = 255;
1850                        else
1851                                scb->sys_buf_length = scsi_bufflen(cmd);
1852                        break;
1853                case TEST_UNIT_READY:
1854                        scb->sys_buf_length = 0;
1855                        break;
1856                default:
1857                        scb->sys_buf_length = scsi_bufflen(cmd);
1858                        break;
1859                }
1860        }
1861        /*fill scb information dependent on scsi command */
1862
1863#ifdef IM_DEBUG_CMD
1864        printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn);
1865#endif
1866
1867        /* for specific device-type debugging: */
1868#ifdef IM_DEBUG_CMD_SPEC_DEV
1869        if (ld(shpnt)[ldn].device_type == IM_DEBUG_CMD_DEVICE)
1870                printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n", ld(shpnt)[ldn].device_type, scsi_cmd, ldn);
1871#endif
1872
1873        /* for possible panics store current command */
1874        last_scsi_command(shpnt)[ldn] = scsi_cmd;
1875        last_scsi_type(shpnt)[ldn] = IM_SCB;
1876        /* update statistical info */
1877        IBM_DS(shpnt).total_accesses++;
1878        IBM_DS(shpnt).ldn_access[ldn]++;
1879
1880        switch (scsi_cmd) {
1881        case READ_6:
1882        case WRITE_6:
1883        case READ_10:
1884        case WRITE_10:
1885        case READ_12:
1886        case WRITE_12:
1887                /* Distinguish between disk and other devices. Only disks (that are the
1888                   most frequently accessed devices) should be supported by the
1889                   IBM-SCSI-Subsystem commands. */
1890                switch (ld(shpnt)[ldn].device_type) {
1891                case TYPE_DISK: /* for harddisks enter here ... */
1892                case TYPE_MOD:  /* ... try it also for MO-drives (send flames as */
1893                        /*     you like, if this won't work.) */
1894                        if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) {
1895                                /* read command preparations */
1896                                scb->enable |= IM_READ_CONTROL;
1897                                IBM_DS(shpnt).ldn_read_access[ldn]++;   /* increase READ-access on ldn stat. */
1898                                scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT;
1899                        } else {        /* write command preparations */
1900                                IBM_DS(shpnt).ldn_write_access[ldn]++;  /* increase write-count on ldn stat. */
1901                                scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT;
1902                        }
1903                        if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) {
1904                                scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) | (((unsigned) cmd->cmnd[2]) << 8) | ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
1905                                scb->u2.blk.count = (unsigned) cmd->cmnd[4];
1906                        } else {
1907                                scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) | (((unsigned) cmd->cmnd[4]) << 8) | (((unsigned) cmd->cmnd[3]) << 16) | (((unsigned) cmd->cmnd[2]) << 24);
1908                                scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) | (((unsigned) cmd->cmnd[7]) << 8);
1909                        }
1910                        last_scsi_logical_block(shpnt)[ldn] = scb->u1.log_blk_adr;
1911                        last_scsi_blockcount(shpnt)[ldn] = scb->u2.blk.count;
1912                        scb->u2.blk.length = ld(shpnt)[ldn].block_length;
1913                        break;
1914                        /* for other devices, enter here. Other types are not known by
1915                           Linux! TYPE_NO_LUN is forbidden as valid device. */
1916                case TYPE_ROM:
1917                case TYPE_TAPE:
1918                case TYPE_PROCESSOR:
1919                case TYPE_WORM:
1920                case TYPE_SCANNER:
1921                case TYPE_MEDIUM_CHANGER:
1922                        /* If there is a sequential-device, IBM recommends to use
1923                           IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE.
1924                           This includes CD-ROM devices, too, due to the partial sequential
1925                           read capabilities. */
1926                        scb->command = IM_OTHER_SCSI_CMD_CMD;
1927                        if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12)
1928                                /* enable READ */
1929                                scb->enable |= IM_READ_CONTROL;
1930                        scb->enable |= IM_BYPASS_BUFFER;
1931                        scb->u1.scsi_cmd_length = cmd->cmd_len;
1932                        memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
1933                        last_scsi_type(shpnt)[ldn] = IM_LONG_SCB;
1934                        /* Read/write on this non-disk devices is also displayworthy,
1935                           so flash-up the LED/display. */
1936                        break;
1937                }
1938                break;
1939        case INQUIRY:
1940                IBM_DS(shpnt).ldn_inquiry_access[ldn]++;
1941                scb->command = IM_DEVICE_INQUIRY_CMD;
1942                scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
1943                scb->u1.log_blk_adr = 0;
1944                break;
1945        case TEST_UNIT_READY:
1946                scb->command = IM_OTHER_SCSI_CMD_CMD;
1947                scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
1948                scb->u1.log_blk_adr = 0;
1949                scb->u1.scsi_cmd_length = 6;
1950                memcpy(scb->u2.scsi_command, cmd->cmnd, 6);
1951                last_scsi_type(shpnt)[ldn] = IM_LONG_SCB;
1952                break;
1953        case READ_CAPACITY:
1954                /* the length of system memory buffer must be exactly 8 bytes */
1955                scb->command = IM_READ_CAPACITY_CMD;
1956                scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER;
1957                if (scb->sys_buf_length > 8)
1958                        scb->sys_buf_length = 8;
1959                break;
1960                /* Commands that need read-only-mode (system <- device): */
1961        case REQUEST_SENSE:
1962                scb->command = IM_REQUEST_SENSE_CMD;
1963                scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
1964                break;
1965                /* Commands that need write-only-mode (system -> device): */
1966        case MODE_SELECT:
1967        case MODE_SELECT_10:
1968                IBM_DS(shpnt).ldn_modeselect_access[ldn]++;
1969                scb->command = IM_OTHER_SCSI_CMD_CMD;
1970                scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;   /*Select needs WRITE-enabled */
1971                scb->u1.scsi_cmd_length = cmd->cmd_len;
1972                memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
1973                last_scsi_type(shpnt)[ldn] = IM_LONG_SCB;
1974                break;
1975                /* For other commands, read-only is useful. Most other commands are
1976                   running without an input-data-block. */
1977        default:
1978                scb->command = IM_OTHER_SCSI_CMD_CMD;
1979                scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
1980                scb->u1.scsi_cmd_length = cmd->cmd_len;
1981                memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
1982                last_scsi_type(shpnt)[ldn] = IM_LONG_SCB;
1983                break;
1984        }
1985        /*issue scb command, and return */
1986        if (++disk_rw_in_progress == 1)
1987                PS2_DISK_LED_ON(shpnt->host_no, target);
1988
1989        if (last_scsi_type(shpnt)[ldn] == IM_LONG_SCB) {
1990                issue_cmd(shpnt, isa_virt_to_bus(scb), IM_LONG_SCB | ldn);
1991                IBM_DS(shpnt).long_scbs++;
1992        } else {
1993                issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | ldn);
1994                IBM_DS(shpnt).scbs++;
1995        }
1996        return 0;
1997}
1998
1999static DEF_SCSI_QCMD(ibmmca_queuecommand)
2000
2001static int __ibmmca_abort(Scsi_Cmnd * cmd)
2002{
2003        /* Abort does not work, as the adapter never generates an interrupt on
2004         * whatever situation is simulated, even when really pending commands
2005         * are running on the adapters' hardware ! */
2006
2007        struct Scsi_Host *shpnt;
2008        unsigned int ldn;
2009        void (*saved_done) (Scsi_Cmnd *);
2010        int target;
2011        int max_pun;
2012        unsigned long imm_command;
2013
2014#ifdef IM_DEBUG_PROBE
2015        printk("IBM MCA SCSI: Abort subroutine called...\n");
2016#endif
2017
2018        shpnt = cmd->device->host;
2019
2020        max_pun = subsystem_maxid(shpnt);
2021        if (ibm_ansi_order) {
2022                target = max_pun - 1 - cmd->device->id;
2023                if ((target <= subsystem_pun(shpnt)) && (cmd->device->id <= subsystem_pun(shpnt)))
2024                        target--;
2025                else if ((target >= subsystem_pun(shpnt)) && (cmd->device->id >= subsystem_pun(shpnt)))
2026                        target++;
2027        } else
2028                target = cmd->device->id;
2029
2030        /* get logical device number, and disable system interrupts */
2031        printk(KERN_WARNING "IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.\n", target, cmd->device->lun);
2032        ldn = get_ldn(shpnt)[target][cmd->device->lun];
2033
2034        /*if cmd for this ldn has already finished, no need to abort */
2035        if (!ld(shpnt)[ldn].cmd) {
2036                    return SUCCESS;
2037        }
2038
2039        /* Clear ld.cmd, save done function, install internal done,
2040         * send abort immediate command (this enables sys. interrupts),
2041         * and wait until the interrupt arrives.
2042         */
2043        saved_done = cmd->scsi_done;
2044        cmd->scsi_done = internal_done;
2045        cmd->SCp.Status = 0;
2046        last_scsi_command(shpnt)[ldn] = IM_ABORT_IMM_CMD;
2047        last_scsi_type(shpnt)[ldn] = IM_IMM_CMD;
2048        imm_command = inl(IM_CMD_REG(shpnt));
2049        imm_command &= (unsigned long) (0xffff0000);    /* mask reserved stuff */
2050        imm_command |= (unsigned long) (IM_ABORT_IMM_CMD);
2051        /* must wait for attention reg not busy */
2052        /* FIXME - timeout, politeness */
2053        while (1) {
2054                if (!(inb(IM_STAT_REG(shpnt)) & IM_BUSY))
2055                        break;
2056        }
2057        /* write registers and enable system interrupts */
2058        outl(imm_command, IM_CMD_REG(shpnt));
2059        outb(IM_IMM_CMD | ldn, IM_ATTN_REG(shpnt));
2060#ifdef IM_DEBUG_PROBE
2061        printk("IBM MCA SCSI: Abort queued to adapter...\n");
2062#endif
2063        spin_unlock_irq(shpnt->host_lock);
2064        while (!cmd->SCp.Status)
2065                yield();
2066        spin_lock_irq(shpnt->host_lock);
2067        cmd->scsi_done = saved_done;
2068#ifdef IM_DEBUG_PROBE
2069        printk("IBM MCA SCSI: Abort returned with adapter response...\n");
2070#endif
2071
2072        /*if abort went well, call saved done, then return success or error */
2073        if (cmd->result == (DID_ABORT << 16)) 
2074        {
2075                cmd->result |= DID_ABORT << 16;
2076                if (cmd->scsi_done)
2077                        (cmd->scsi_done) (cmd);
2078                ld(shpnt)[ldn].cmd = NULL;
2079#ifdef IM_DEBUG_PROBE
2080                printk("IBM MCA SCSI: Abort finished with success.\n");
2081#endif
2082                return SUCCESS;
2083        } else {
2084                cmd->result |= DID_NO_CONNECT << 16;
2085                if (cmd->scsi_done)
2086                        (cmd->scsi_done) (cmd);
2087                ld(shpnt)[ldn].cmd = NULL;
2088#ifdef IM_DEBUG_PROBE
2089                printk("IBM MCA SCSI: Abort failed.\n");
2090#endif
2091                return FAILED;
2092        }
2093}
2094
2095static int ibmmca_abort(Scsi_Cmnd * cmd)
2096{
2097        struct Scsi_Host *shpnt = cmd->device->host;
2098        int rc;
2099
2100        spin_lock_irq(shpnt->host_lock);
2101        rc = __ibmmca_abort(cmd);
2102        spin_unlock_irq(shpnt->host_lock);
2103
2104        return rc;
2105}
2106
2107static int __ibmmca_host_reset(Scsi_Cmnd * cmd)
2108{
2109        struct Scsi_Host *shpnt;
2110        Scsi_Cmnd *cmd_aid;
2111        int ticks, i;
2112        unsigned long imm_command;
2113
2114        BUG_ON(cmd == NULL);
2115
2116        ticks = IM_RESET_DELAY * HZ;
2117        shpnt = cmd->device->host;
2118
2119        if (local_checking_phase_flag(shpnt)) {
2120                printk(KERN_WARNING "IBM MCA SCSI: unable to reset while checking devices.\n");
2121                return FAILED;
2122        }
2123
2124        /* issue reset immediate command to subsystem, and wait for interrupt */
2125        printk("IBM MCA SCSI: resetting all devices.\n");
2126        reset_status(shpnt) = IM_RESET_IN_PROGRESS;
2127        last_scsi_command(shpnt)[0xf] = IM_RESET_IMM_CMD;
2128        last_scsi_type(shpnt)[0xf] = IM_IMM_CMD;
2129        imm_command = inl(IM_CMD_REG(shpnt));
2130        imm_command &= (unsigned long) (0xffff0000);    /* mask reserved stuff */
2131        imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
2132        /* must wait for attention reg not busy */
2133        while (1) {
2134                if (!(inb(IM_STAT_REG(shpnt)) & IM_BUSY))
2135                        break;
2136                spin_unlock_irq(shpnt->host_lock);
2137                yield();
2138                spin_lock_irq(shpnt->host_lock);
2139        }
2140        /*write registers and enable system interrupts */
2141        outl(imm_command, IM_CMD_REG(shpnt));
2142        outb(IM_IMM_CMD | 0xf, IM_ATTN_REG(shpnt));
2143        /* wait for interrupt finished or intr_stat register to be set, as the
2144         * interrupt will not be executed, while we are in here! */
2145         
2146        /* FIXME: This is really really icky we so want a sleeping version of this ! */
2147        while (reset_status(shpnt) == IM_RESET_IN_PROGRESS && --ticks && ((inb(IM_INTR_REG(shpnt)) & 0x8f) != 0x8f)) {
2148                udelay((1 + 999 / HZ) * 1000);
2149                barrier();
2150        }
2151        /* if reset did not complete, just return an error */
2152        if (!ticks) {
2153                printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
2154                reset_status(shpnt) = IM_RESET_FINISHED_FAIL;
2155                return FAILED;
2156        }
2157
2158        if ((inb(IM_INTR_REG(shpnt)) & 0x8f) == 0x8f) {
2159                /* analysis done by this routine and not by the intr-routine */
2160                if (inb(IM_INTR_REG(shpnt)) == 0xaf)
2161                        reset_status(shpnt) = IM_RESET_FINISHED_OK_NO_INT;
2162                else if (inb(IM_INTR_REG(shpnt)) == 0xcf)
2163                        reset_status(shpnt) = IM_RESET_FINISHED_FAIL;
2164                else            /* failed, 4get it */
2165                        reset_status(shpnt) = IM_RESET_NOT_IN_PROGRESS_NO_INT;
2166                outb(IM_EOI | 0xf, IM_ATTN_REG(shpnt));
2167        }
2168
2169        /* if reset failed, just return an error */
2170        if (reset_status(shpnt) == IM_RESET_FINISHED_FAIL) {
2171                printk(KERN_ERR "IBM MCA SCSI: reset failed.\n");
2172                return FAILED;
2173        }
2174
2175        /* so reset finished ok - call outstanding done's, and return success */
2176        printk(KERN_INFO "IBM MCA SCSI: Reset successfully completed.\n");
2177        for (i = 0; i < MAX_LOG_DEV; i++) {
2178                cmd_aid = ld(shpnt)[i].cmd;
2179                if (cmd_aid && cmd_aid->scsi_done) {
2180                        ld(shpnt)[i].cmd = NULL;
2181                        cmd_aid->result = DID_RESET << 16;
2182                }
2183        }
2184        return SUCCESS;
2185}
2186
2187static int ibmmca_host_reset(Scsi_Cmnd * cmd)
2188{
2189        struct Scsi_Host *shpnt = cmd->device->host;
2190        int rc;
2191
2192        spin_lock_irq(shpnt->host_lock);
2193        rc = __ibmmca_host_reset(cmd);
2194        spin_unlock_irq(shpnt->host_lock);
2195
2196        return rc;
2197}
2198
2199static int ibmmca_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *info)
2200{
2201        int size = capacity;
2202        info[0] = 64;
2203        info[1] = 32;
2204        info[2] = size / (info[0] * info[1]);
2205        if (info[2] >= 1024) {
2206                info[0] = 128;
2207                info[1] = 63;
2208                info[2] = size / (info[0] * info[1]);
2209                if (info[2] >= 1024) {
2210                        info[0] = 255;
2211                        info[1] = 63;
2212                        info[2] = size / (info[0] * info[1]);
2213                        if (info[2] >= 1024)
2214                                info[2] = 1023;
2215                }
2216        }
2217        return 0;
2218}
2219
2220/* calculate percentage of total accesses on a ldn */
2221static int ldn_access_load(struct Scsi_Host *shpnt, int ldn)
2222{
2223        if (IBM_DS(shpnt).total_accesses == 0)
2224                return (0);
2225        if (IBM_DS(shpnt).ldn_access[ldn] == 0)
2226                return (0);
2227        return (IBM_DS(shpnt).ldn_access[ldn] * 100) / IBM_DS(shpnt).total_accesses;
2228}
2229
2230/* calculate total amount of r/w-accesses */
2231static int ldn_access_total_read_write(struct Scsi_Host *shpnt)
2232{
2233        int a;
2234        int i;
2235
2236        a = 0;
2237        for (i = 0; i <= MAX_LOG_DEV; i++)
2238                a += IBM_DS(shpnt).ldn_read_access[i] + IBM_DS(shpnt).ldn_write_access[i];
2239        return (a);
2240}
2241
2242static int ldn_access_total_inquiry(struct Scsi_Host *shpnt)
2243{
2244        int a;
2245        int i;
2246
2247        a = 0;
2248        for (i = 0; i <= MAX_LOG_DEV; i++)
2249                a += IBM_DS(shpnt).ldn_inquiry_access[i];
2250        return (a);
2251}
2252
2253static int ldn_access_total_modeselect(struct Scsi_Host *shpnt)
2254{
2255        int a;
2256        int i;
2257
2258        a = 0;
2259        for (i = 0; i <= MAX_LOG_DEV; i++)
2260                a += IBM_DS(shpnt).ldn_modeselect_access[i];
2261        return (a);
2262}
2263
2264/* routine to display info in the proc-fs-structure (a deluxe feature) */
2265static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout)
2266{
2267        int len = 0;
2268        int i, id, lun;
2269        unsigned long flags;
2270        int max_pun;
2271
2272        
2273        spin_lock_irqsave(shpnt->host_lock, flags);     /* Check it */
2274
2275        max_pun = subsystem_maxid(shpnt);
2276
2277        len += sprintf(buffer + len, "\n             IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n", IBMMCA_SCSI_DRIVER_VERSION);
2278        len += sprintf(buffer + len, " SCSI Access-Statistics:\n");
2279        len += sprintf(buffer + len, "               Device Scanning Order....: %s\n", (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard");
2280#ifdef CONFIG_SCSI_MULTI_LUN
2281        len += sprintf(buffer + len, "               Multiple LUN probing.....: Yes\n");
2282#else
2283        len += sprintf(buffer + len, "               Multiple LUN probing.....: No\n");
2284#endif
2285        len += sprintf(buffer + len, "               This Hostnumber..........: %d\n", shpnt->host_no);
2286        len += sprintf(buffer + len, "               Base I/O-Port............: 0x%x\n", (unsigned int) (IM_CMD_REG(shpnt)));
2287        len += sprintf(buffer + len, "               (Shared) IRQ.............: %d\n", IM_IRQ);
2288        len += sprintf(buffer + len, "               Total Interrupts.........: %d\n", IBM_DS(shpnt).total_interrupts);
2289        len += sprintf(buffer + len, "               Total SCSI Accesses......: %d\n", IBM_DS(shpnt).total_accesses);
2290        len += sprintf(buffer + len, "               Total short SCBs.........: %d\n", IBM_DS(shpnt).scbs);
2291        len += sprintf(buffer + len, "               Total long SCBs..........: %d\n", IBM_DS(shpnt).long_scbs);
2292        len += sprintf(buffer + len, "                 Total SCSI READ/WRITE..: %d\n", ldn_access_total_read_write(shpnt));
2293        len += sprintf(buffer + len, "                 Total SCSI Inquiries...: %d\n", ldn_access_total_inquiry(shpnt));
2294        len += sprintf(buffer + len, "                 Total SCSI Modeselects.: %d\n", ldn_access_total_modeselect(shpnt));
2295        len += sprintf(buffer + len, "                 Total SCSI other cmds..: %d\n", IBM_DS(shpnt).total_accesses - ldn_access_total_read_write(shpnt)
2296                       - ldn_access_total_modeselect(shpnt)
2297                       - ldn_access_total_inquiry(shpnt));
2298        len += sprintf(buffer + len, "               Total SCSI command fails.: %d\n\n", IBM_DS(shpnt).total_errors);
2299        len += sprintf(buffer + len, " Logical-Device-Number (LDN) Access-Statistics:\n");
2300        len += sprintf(buffer + len, "         LDN | Accesses [%%] |   READ    |   WRITE   | ASSIGNMENTS\n");
2301        len += sprintf(buffer + len, "        -----|--------------|-----------|-----------|--------------\n");
2302        for (i = 0; i <= MAX_LOG_DEV; i++)
2303                len += sprintf(buffer + len, "         %2X  |    %3d       |  %8d |  %8d | %8d\n", i, ldn_access_load(shpnt, i), IBM_DS(shpnt).ldn_read_access[i], IBM_DS(shpnt).ldn_write_access[i], IBM_DS(shpnt).ldn_assignments[i]);
2304        len += sprintf(buffer + len, "        -----------------------------------------------------------\n\n");
2305        len += sprintf(buffer + len, " Dynamical-LDN-Assignment-Statistics:\n");
2306        len += sprintf(buffer + len, "               Number of physical SCSI-devices..: %d (+ Adapter)\n", IBM_DS(shpnt).total_scsi_devices);
2307        len += sprintf(buffer + len, "               Dynamical Assignment necessary...: %s\n", IBM_DS(shpnt).dyn_flag ? "Yes" : "No ");
2308        len += sprintf(buffer + len, "               Next LDN to be assigned..........: 0x%x\n", next_ldn(shpnt));
2309        len += sprintf(buffer + len, "               Dynamical assignments done yet...: %d\n", IBM_DS(shpnt).dynamical_assignments);
2310        len += sprintf(buffer + len, "\n Current SCSI-Device-Mapping:\n");
2311        len += sprintf(buffer + len, "        Physical SCSI-Device Map               Logical SCSI-Device Map\n");
2312        len += sprintf(buffer + len, "    ID\\LUN  0  1  2  3  4  5  6  7       ID\\LUN  0  1  2  3  4  5  6  7\n");
2313        for (id = 0; id < max_pun; id++) {
2314                len += sprintf(buffer + len, "    %2d     ", id);
2315                for (lun = 0; lun < 8; lun++)
2316                        len += sprintf(buffer + len, "%2s ", ti_p(get_scsi(shpnt)[id][lun]));
2317                len += sprintf(buffer + len, "      %2d     ", id);
2318                for (lun = 0; lun < 8; lun++)
2319                        len += sprintf(buffer + len, "%2s ", ti_l(get_ldn(shpnt)[id][lun]));
2320                len += sprintf(buffer + len, "\n");
2321        }
2322
2323        len += sprintf(buffer + len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n");
2324        len += sprintf(buffer + len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n");
2325        len += sprintf(buffer + len, " - = nothing found, nothing assigned or unprobed LUN)\n\n");
2326
2327        *start = buffer + offset;
2328        len -= offset;
2329        if (len > length)
2330                len = length;
2331        spin_unlock_irqrestore(shpnt->host_lock, flags);
2332        return len;
2333}
2334
2335static int option_setup(char *str)
2336{
2337        int ints[IM_MAX_HOSTS];
2338        char *cur = str;
2339        int i = 1;
2340
2341        while (cur && isdigit(*cur) && i < IM_MAX_HOSTS) {
2342                ints[i++] = simple_strtoul(cur, NULL, 0);
2343                if ((cur = strchr(cur, ',')) != NULL)
2344                        cur++;
2345        }
2346        ints[0] = i - 1;
2347        internal_ibmmca_scsi_setup(cur, ints);
2348        return 1;
2349}
2350
2351__setup("ibmmcascsi=", option_setup);
2352
2353static struct mca_driver ibmmca_driver = {
2354        .id_table = ibmmca_id_table,
2355        .driver = {
2356                .name   = "ibmmca",
2357                .bus    = &mca_bus_type,
2358                .probe  = ibmmca_probe,
2359                .remove = __devexit_p(ibmmca_remove),
2360        },
2361};
2362
2363static int __init ibmmca_init(void)
2364{
2365#ifdef MODULE
2366        /* If the driver is run as module, read from conf.modules or cmd-line */
2367        if (boot_options)
2368                option_setup(boot_options);
2369#endif
2370
2371        return mca_register_driver_integrated(&ibmmca_driver, MCA_INTEGSCSI);
2372}
2373
2374static void __exit ibmmca_exit(void)
2375{
2376        mca_unregister_driver(&ibmmca_driver);
2377}
2378
2379module_init(ibmmca_init);
2380module_exit(ibmmca_exit);
2381