drivers/scsi/ibmmca.c

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