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