drivers/scsi/u14-34f.c

/* */
This source file includes following definitions.
wait_on_busy
board_inquiry
port_detect
u14_34f_detect
build_sg_list
u14_34f_queuecommand
u14_34f_abort
u14_34f_reset
u14_34f_biosparam
u14_34f_interrupt_handler
   1 /*
   2  *      u14-34f.c - Low-level driver for UltraStor 14F/34F SCSI host adapters.
   3  *
   4  *      13 Jun 1995 rev. 2.01 for linux 1.2.10
   5  *         HAVE_OLD_UX4F_FIRMWARE should be defined for U34F boards when
   6  *         the firmware prom is not the lastest one (28008-006).
   7  *
   8  *      11 Mar 1995 rev. 2.00 for linux 1.2.0
   9  *          Fixed a bug which prevented media change detection for removable
  10  *          disk drives.
  11  *
  12  *      23 Feb 1995 rev. 1.18 for linux 1.1.94
  13  *          Added a check for scsi_register returning NULL.
  14  *
  15  *      11 Feb 1995 rev. 1.17 for linux 1.1.91
  16  *          U14F qualified to run with 32 sglists.
  17  *          Now DEBUG_RESET is disabled by default.
  18  *
  19  *       9 Feb 1995 rev. 1.16 for linux 1.1.90
  20  *          Use host->wish_block instead of host->block.
  21  *
  22  *       8 Feb 1995 rev. 1.15 for linux 1.1.89
  23  *          Cleared target_time_out counter while performing a reset.
  24  *
  25  *      28 Jan 1995 rev. 1.14 for linux 1.1.86
  26  *          Added module support.
  27  *          Log and do a retry when a disk drive returns a target status
  28  *          different from zero on a recovered error.
  29  *          Auto detects if U14F boards have an old firmware revision.
  30  *          Max number of scatter/gather lists set to 16 for all boards
  31  *          (most installation run fine using 33 sglists, while other
  32  *          has problems when using more then 16).
  33  *
  34  *      16 Jan 1995 rev. 1.13 for linux 1.1.81
  35  *          Display a message if check_region detects a port address
  36  *          already in use.
  37  *
  38  *      15 Dec 1994 rev. 1.12 for linux 1.1.74
  39  *          The host->block flag is set for all the detected ISA boards.
  40  *
  41  *      30 Nov 1994 rev. 1.11 for linux 1.1.68
  42  *          Redo i/o on target status CHECK_CONDITION for TYPE_DISK only.
  43  *          Added optional support for using a single board at a time.
  44  *
  45  *      14 Nov 1994 rev. 1.10 for linux 1.1.63
  46  *
  47  *      28 Oct 1994 rev. 1.09 for linux 1.1.58  Final BETA release.
  48  *      16 Jul 1994 rev. 1.00 for linux 1.1.29  Initial ALPHA release.
  49  *
  50  *          This driver is a total replacement of the original UltraStor 
  51  *          scsi driver, but it supports ONLY the 14F and 34F boards.
  52  *          It can be configured in the same kernel in which the original
  53  *          ultrastor driver is configured to allow the original U24F
  54  *          support.
  55  * 
  56  *          Multiple U14F and/or U34F host adapters are supported.
  57  *
  58  *      Copyright (C) 1994, 1995 Dario Ballabio (dario@milano.europe.dg.com)
  59  *
  60  *      WARNING: if your 14/34F board has an old firmware revision (see below)
  61  *               you must change "#undef" into "#define" in the following
  62  *               statement.
  63  */
  64 #undef HAVE_OLD_UX4F_FIRMWARE
  65 /*
  66  *  The UltraStor 14F, 24F, and 34F are a family of intelligent, high
  67  *  performance SCSI-2 host adapters.
  68  *  Here is the scoop on the various models:
  69  *
  70  *  14F - ISA first-party DMA HA with floppy support and WD1003 emulation.
  71  *  24F - EISA Bus Master HA with floppy support and WD1003 emulation.
  72  *  34F - VESA Local-Bus Bus Master HA (no WD1003 emulation).
  73  *
  74  *  This code has been tested with up to two U14F boards, using both 
  75  *  firmware 28004-005/38004-004 (BIOS rev. 2.00) and the latest firmware
  76  *  28004-006/38004-005 (BIOS rev. 2.01). 
  77  *
  78  *  The latest firmware is required in order to get reliable operations when 
  79  *  clustering is enabled. ENABLE_CLUSTERING provides a performance increase
  80  *  up to 50% on sequential access.
  81  *
  82  *  Since the Scsi_Host_Template structure is shared among all 14F and 34F,
  83  *  the last setting of use_clustering is in effect for all of these boards.
  84  *
  85  *  Here a sample configuration using two U14F boards:
  86  *
  87  U14F0: PORT 0x330, BIOS 0xc8000, IRQ 11, DMA 5, SG 32, Mbox 16, CmdLun 2, C1.
  88  U14F1: PORT 0x340, BIOS 0x00000, IRQ 10, DMA 6, SG 32, Mbox 16, CmdLun 2, C1.
  89  *
  90  *  The boot controller must have its BIOS enabled, while other boards can
  91  *  have their BIOS disabled, or enabled to an higher address.
  92  *  Boards are named Ux4F0, Ux4F1..., according to the port address order in
  93  *  the io_port[] array.
  94  *  
  95  *  The following facts are based on real testing results (not on
  96  *  documentation) on the above U14F board.
  97  *  
  98  *  - The U14F board should be jumpered for bus on time less or equal to 7 
  99  *    microseconds, while the default is 11 microseconds. This is order to 
 100  *    get acceptable performance while using floppy drive and hard disk 
 101  *    together. The jumpering for 7 microseconds is: JP13 pin 15-16, 
 102  *    JP14 pin 7-8 and pin 9-10.
 103  *    The reduction has a little impact on scsi performance.
 104  *  
 105  *  - If scsi bus length exceeds 3m., the scsi bus speed needs to be reduced
 106  *    from 10Mhz to 5Mhz (do this by inserting a jumper on JP13 pin 7-8).
 107  *
 108  *  - If U14F on board firmware is older than 28004-006/38004-005,
 109  *    the U14F board is unable to provide reliable operations if the scsi 
 110  *    request length exceeds 16Kbyte. When this length is exceeded the
 111  *    behavior is: 
 112  *    - adapter_status equal 0x96 or 0xa3 or 0x93 or 0x94;
 113  *    - adapter_status equal 0 and target_status equal 2 on for all targets
 114  *      in the next operation following the reset.
 115  *    This sequence takes a long time (>3 seconds), so in the meantime
 116  *    the SD_TIMEOUT in sd.c could expire giving rise to scsi aborts
 117  *    (SD_TIMEOUT has been increased from 3 to 6 seconds in 1.1.31).
 118  *    Because of this I had to DISABLE_CLUSTERING and to work around the
 119  *    bus reset in the interrupt service routine, returning DID_BUS_BUSY
 120  *    so that the operations are retried without complains from the scsi.c
 121  *    code.
 122  *    Any reset of the scsi bus is going to kill tape operations, since
 123  *    no retry is allowed for tapes. Bus resets are more likely when the
 124  *    scsi bus is under heavy load.
 125  *    Requests using scatter/gather have a maximum length of 16 x 1024 bytes 
 126  *    when DISABLE_CLUSTERING is in effect, but unscattered requests could be
 127  *    larger than 16Kbyte.
 128  *
 129  *    The new firmware has fixed all the above problems.
 130  *
 131  *  For U34F boards the latest bios prom is 38008-002 (BIOS rev. 2.01),
 132  *  the latest firmware prom is 28008-006. Older firmware 28008-005 has
 133  *  problems when using more then 16 scatter/gather lists.
 134  *
 135  *  In order to support multiple ISA boards in a reliable way,
 136  *  the driver sets host->wish_block = TRUE for all ISA boards.
 137  */
 138 
 139 #if defined(MODULE)
 140 #include <linux/module.h>
 141 #include <linux/version.h>
 142 #endif
 143 
 144 #include <linux/string.h>
 145 #include <linux/sched.h>
 146 #include <linux/kernel.h>
 147 #include <linux/ioport.h>
 148 #include <asm/io.h>
 149 #include <asm/system.h>
 150 #include <linux/proc_fs.h>
 151 #include <linux/blk.h>
 152 #include "scsi.h"
 153 #include "hosts.h"
 154 #include "sd.h"
 155 #include <asm/dma.h>
 156 #include <asm/irq.h>
 157 #include "u14-34f.h"
 158 #include<linux/stat.h>
 159 
 160 struct proc_dir_entry proc_scsi_u14_34f = {
 161     PROC_SCSI_U14_34F, 6, "u14_34f",
 162     S_IFDIR | S_IRUGO | S_IXUGO, 2
 163 };
 164 
 165 /* Values for the PRODUCT_ID ports for the 14/34F */
 166 #define PRODUCT_ID1  0x56
 167 #define PRODUCT_ID2  0x40        /* NOTE: Only upper nibble is used */
 168 
 169 /* Subversion values */
 170 #define ISA  0
 171 #define ESA 1
 172 
 173 #define OP_HOST_ADAPTER   0x1
 174 #define OP_SCSI           0x2
 175 #define OP_RESET          0x4
 176 #define DTD_SCSI          0x0
 177 #define DTD_IN            0x1
 178 #define DTD_OUT           0x2
 179 #define DTD_NONE          0x3
 180 #define HA_CMD_INQUIRY    0x1
 181 #define HA_CMD_SELF_DIAG  0x2
 182 #define HA_CMD_READ_BUFF  0x3
 183 #define HA_CMD_WRITE_BUFF 0x4
 184 
 185 #undef  DEBUG_DETECT
 186 #undef  DEBUG_INTERRUPT
 187 #undef  DEBUG_STATISTICS
 188 #undef  DEBUG_RESET
 189 
 190 #define MAX_TARGET 8
 191 #define MAX_IRQ 16
 192 #define MAX_BOARDS 4
 193 #define MAX_MAILBOXES 16
 194 #define MAX_SGLIST 32
 195 #define MAX_SAFE_SGLIST 16
 196 #define MAX_CMD_PER_LUN 2
 197 
 198 #define FALSE 0
 199 #define TRUE 1
 200 #define FREE 0
 201 #define IN_USE   1
 202 #define LOCKED   2
 203 #define IN_RESET 3
 204 #define IGNORE   4
 205 #define NO_IRQ  0xff
 206 #define NO_DMA  0xff
 207 #define MAXLOOP 200000
 208 
 209 #define REG_LCL_MASK      0
 210 #define REG_LCL_INTR      1
 211 #define REG_SYS_MASK      2
 212 #define REG_SYS_INTR      3
 213 #define REG_PRODUCT_ID1   4
 214 #define REG_PRODUCT_ID2   5
 215 #define REG_CONFIG1       6
 216 #define REG_CONFIG2       7
 217 #define REG_OGM           8
 218 #define REG_ICM           12
 219 #define REGION_SIZE       13
 220 #define BSY_ASSERTED      0x01
 221 #define IRQ_ASSERTED      0x01
 222 #define CMD_RESET         0xc0
 223 #define CMD_OGM_INTR      0x01
 224 #define CMD_CLR_INTR      0x01
 225 #define CMD_ENA_INTR      0x81
 226 #define ASOK              0x00
 227 #define ASST              0x91
 228 
 229 #define PACKED          __attribute__((packed))
 230 
 231 /* MailBox SCSI Command Packet */
 232 struct mscp {
 233    unsigned char opcode: 3;             /* type of command */
 234    unsigned char xdir: 2;               /* data transfer direction */
 235    unsigned char dcn: 1;                /* disable disconnect */
 236    unsigned char ca: 1;                 /* use cache (if available) */
 237    unsigned char sg: 1;                 /* scatter/gather operation */
 238    unsigned char target: 3;             /* target SCSI id */
 239    unsigned char ch_no: 2;              /* SCSI channel (always 0 for 14f) */
 240    unsigned char lun: 3;                /* logical unit number */
 241    unsigned int data_address PACKED;    /* transfer data pointer */
 242    unsigned int data_len PACKED;        /* length in bytes */
 243    unsigned int command_link PACKED;    /* for linking command chains */
 244    unsigned char scsi_command_link_id;  /* identifies command in chain */
 245    unsigned char use_sg;                /* (if sg is set) 8 bytes per list */
 246    unsigned char sense_len;
 247    unsigned char scsi_cdbs_len;         /* 6, 10, or 12 */
 248    unsigned char scsi_cdbs[12];         /* SCSI commands */
 249    unsigned char adapter_status;        /* non-zero indicates HA error */
 250    unsigned char target_status;         /* non-zero indicates target error */
 251    unsigned int sense_addr PACKED;
 252 
 253    Scsi_Cmnd *SCpnt;
 254 
 255    struct sg_list {
 256       unsigned int address;     /* Segment Address */
 257       unsigned int num_bytes;   /* Segment Length */
 258       } sglist[MAX_SGLIST];
 259 
 260    unsigned int index;   /* cp index */
 261    };
 262 
 263 struct hostdata {
 264    struct mscp cp[MAX_MAILBOXES];       /* Mailboxes for this board */
 265    unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */
 266    unsigned int last_cp_used;           /* Index of last mailbox used */
 267    unsigned int iocount;                /* Total i/o done for this board */
 268    unsigned int multicount;             /* Total ... in second ihdlr loop */
 269    int board_number;                    /* Number of this board */
 270    char board_name[16];                 /* Name of this board */
 271    char board_id[256];                  /* data from INQUIRY on this board */
 272    int in_reset;                        /* True if board is doing a reset */
 273    int target_time_out[MAX_TARGET];     /* N. of timeout errors on target */
 274    int target_reset[MAX_TARGET];        /* If TRUE redo operation on target */
 275    unsigned char subversion;            /* Bus type, either ISA or ESA */
 276    unsigned char heads;
 277    unsigned char sectors;
 278 
 279    /* slot != 0 for the U24F, slot == 0 for both the U14F and U34F */
 280    unsigned char slot;
 281    };
 282 
 283 static struct Scsi_Host * sh[MAX_BOARDS + 1];
 284 static const char* driver_name = "Ux4F";
 285 static unsigned int irqlist[MAX_IRQ], calls[MAX_IRQ];
 286 
 287 #define HD(board) ((struct hostdata *) &sh[board]->hostdata)
 288 #define BN(board) (HD(board)->board_name)
 289 
 290 static void u14_34f_interrupt_handler(int, void *, struct pt_regs *);
 291 static int do_trace = FALSE;
 292 
 293 static inline unchar wait_on_busy(ushort iobase) {
     /*  */
 294    unsigned int loop = MAXLOOP;
 295 
 296    while (inb(iobase + REG_LCL_INTR) & BSY_ASSERTED)
 297       if (--loop == 0) return TRUE;
 298 
 299    return FALSE;
 300 }
 301 
 302 static int board_inquiry(unsigned int j) {
     /*  */
 303    struct mscp *cpp;
 304    unsigned int time, limit = 0;
 305 
 306    cpp = &HD(j)->cp[0];
 307    memset(cpp, 0, sizeof(struct mscp));
 308    cpp->opcode = OP_HOST_ADAPTER;
 309    cpp->xdir = DTD_IN;
 310    cpp->data_address = (unsigned int) HD(j)->board_id;
 311    cpp->data_len = sizeof(HD(j)->board_id);
 312    cpp->scsi_cdbs_len = 6;
 313    cpp->scsi_cdbs[0] = HA_CMD_INQUIRY;
 314 
 315    if (wait_on_busy(sh[j]->io_port)) {
 316       printk("%s: board_inquiry, adapter busy.\n", BN(j));
 317       return TRUE;
 318       }
 319 
 320    HD(j)->cp_stat[0] = IGNORE;
 321 
 322    /* Clear the interrupt indication */
 323    outb(CMD_CLR_INTR, sh[j]->io_port + REG_SYS_INTR);
 324 
 325    /* Store pointer in OGM address bytes */
 326    outl((unsigned int)cpp, sh[j]->io_port + REG_OGM);
 327 
 328    /* Issue OGM interrupt */
 329    outb(CMD_OGM_INTR, sh[j]->io_port + REG_LCL_INTR);
 330 
 331    sti();
 332    time = jiffies;
 333    while (jiffies < (time + 100) && limit++ < 100000000);
 334    cli();
 335 
 336    if (cpp->adapter_status || HD(j)->cp_stat[0] != FREE) {
 337       HD(j)->cp_stat[0] = FREE;
 338       printk("%s: board_inquiry, err 0x%x.\n", BN(j), cpp->adapter_status);
 339       return TRUE;
 340       }
 341 
 342    return FALSE;
 343 }
 344 
 345 static inline int port_detect(ushort *port_base, unsigned int j, 
     /*  */
 346                               Scsi_Host_Template * tpnt) {
 347    unsigned char irq, dma_channel, subversion;
 348    unsigned char in_byte;
 349 
 350    /* Allowed BIOS base addresses (NULL indicates reserved) */
 351    void *bios_segment_table[8] = { 
 352       NULL, 
 353       (void *) 0xc4000, (void *) 0xc8000, (void *) 0xcc000, (void *) 0xd0000,
 354       (void *) 0xd4000, (void *) 0xd8000, (void *) 0xdc000
 355       };
 356    
 357    /* Allowed IRQs */
 358    unsigned char interrupt_table[4] = { 15, 14, 11, 10 };
 359    
 360    /* Allowed DMA channels for ISA (0 indicates reserved) */
 361    unsigned char dma_channel_table[4] = { 5, 6, 7, 0 };
 362    
 363    /* Head/sector mappings */
 364    struct {
 365       unsigned char heads;
 366       unsigned char sectors;
 367       } mapping_table[4] = { 
 368            { 16, 63 }, { 64, 32 }, { 64, 63 }, { 64, 32 }
 369            };
 370 
 371    struct config_1 {
 372       unsigned char bios_segment: 3;
 373       unsigned char removable_disks_as_fixed: 1;
 374       unsigned char interrupt: 2;
 375       unsigned char dma_channel: 2;
 376       } config_1;
 377 
 378    struct config_2 {
 379       unsigned char ha_scsi_id: 3;
 380       unsigned char mapping_mode: 2;
 381       unsigned char bios_drive_number: 1;
 382       unsigned char tfr_port: 2;
 383       } config_2;
 384 
 385    char name[16];
 386 
 387    sprintf(name, "%s%d", driver_name, j);
 388 
 389    if(check_region(*port_base, REGION_SIZE)) {
 390       printk("%s: address 0x%03x in use, skipping probe.\n", 
 391              name, *port_base);
 392       return FALSE;
 393       }
 394 
 395    if (inb(*port_base + REG_PRODUCT_ID1) != PRODUCT_ID1) return FALSE;
 396 
 397    in_byte = inb(*port_base + REG_PRODUCT_ID2);
 398 
 399    if ((in_byte & 0xf0) != PRODUCT_ID2) return FALSE;
 400 
 401    *(char *)&config_1 = inb(*port_base + REG_CONFIG1);
 402    *(char *)&config_2 = inb(*port_base + REG_CONFIG2);
 403 
 404    irq = interrupt_table[config_1.interrupt];
 405    dma_channel = dma_channel_table[config_1.dma_channel];
 406    subversion = (in_byte & 0x0f);
 407 
 408    /* Board detected, allocate its IRQ if not already done */
 409    if ((irq >= MAX_IRQ) || ((irqlist[irq] == NO_IRQ) && request_irq
 410        (irq, u14_34f_interrupt_handler, SA_INTERRUPT, driver_name, NULL))) {
 411       printk("%s: unable to allocate IRQ %u, detaching.\n", name, irq);
 412       return FALSE;
 413       }
 414 
 415    if (subversion == ISA && request_dma(dma_channel, driver_name)) {
 416       printk("%s: unable to allocate DMA channel %u, detaching.\n",
 417              name, dma_channel);
 418       free_irq(irq, NULL);
 419       return FALSE;
 420       }
 421 
 422    sh[j] = scsi_register(tpnt, sizeof(struct hostdata));
 423 
 424    if (sh[j] == NULL) {
 425       printk("%s: unable to register host, detaching.\n", name);
 426 
 427       if (irqlist[irq] == NO_IRQ) free_irq(irq, NULL);
 428 
 429       if (subversion == ISA) free_dma(dma_channel);
 430 
 431       return FALSE;
 432       }
 433 
 434    sh[j]->io_port = *port_base;
 435    sh[j]->n_io_port = REGION_SIZE;
 436    sh[j]->base = bios_segment_table[config_1.bios_segment];
 437    sh[j]->irq = irq;
 438    sh[j]->sg_tablesize = MAX_SGLIST;
 439    sh[j]->this_id = config_2.ha_scsi_id;
 440    sh[j]->can_queue = MAX_MAILBOXES;
 441    sh[j]->cmd_per_lun = MAX_CMD_PER_LUN;
 442 
 443 #if defined(DEBUG_DETECT)
 444    {
 445    unsigned char sys_mask, lcl_mask;
 446 
 447    sys_mask = inb(sh[j]->io_port + REG_SYS_MASK);
 448    lcl_mask = inb(sh[j]->io_port + REG_LCL_MASK);
 449    printk("SYS_MASK 0x%x, LCL_MASK 0x%x.\n", sys_mask, lcl_mask);
 450    }
 451 #endif
 452 
 453    /* If BIOS is disabled, force enable interrupts */
 454    if (sh[j]->base == 0) outb(CMD_ENA_INTR, sh[j]->io_port + REG_SYS_MASK);
 455 
 456    /* Register the I/O space that we use */
 457    request_region(sh[j]->io_port, REGION_SIZE, driver_name);
 458 
 459    memset(HD(j), 0, sizeof(struct hostdata));
 460    HD(j)->heads = mapping_table[config_2.mapping_mode].heads;
 461    HD(j)->sectors = mapping_table[config_2.mapping_mode].sectors;
 462    HD(j)->subversion = subversion;
 463    HD(j)->board_number = j;
 464    irqlist[irq] = j;
 465 
 466    if (HD(j)->subversion == ESA) {
 467 
 468 #if defined (HAVE_OLD_UX4F_FIRMWARE)
 469       sh[j]->sg_tablesize = MAX_SAFE_SGLIST;
 470 #endif
 471 
 472       sh[j]->dma_channel = NO_DMA;
 473       sh[j]->unchecked_isa_dma = FALSE;
 474       sprintf(BN(j), "U34F%d", j);
 475       }
 476    else {
 477       sh[j]->wish_block = TRUE;
 478 
 479 #if defined (HAVE_OLD_UX4F_FIRMWARE)
 480       sh[j]->hostt->use_clustering = DISABLE_CLUSTERING;
 481       sh[j]->sg_tablesize = MAX_SAFE_SGLIST;
 482 #endif
 483 
 484       sh[j]->dma_channel = dma_channel;
 485       sh[j]->unchecked_isa_dma = TRUE;
 486       sprintf(BN(j), "U14F%d", j);
 487       disable_dma(dma_channel);
 488       clear_dma_ff(dma_channel);
 489       set_dma_mode(dma_channel, DMA_MODE_CASCADE);
 490       enable_dma(dma_channel);
 491       }
 492 
 493    if (HD(j)->subversion == ISA && !board_inquiry(j)) {
 494       HD(j)->board_id[40] = 0;
 495 
 496       if (strcmp(&HD(j)->board_id[32], "06000600")) {
 497          printk("%s: %s.\n", BN(j), &HD(j)->board_id[8]);
 498          printk("%s: firmware %s is outdated, FW PROM should be 28004-006.\n",
 499                 BN(j), &HD(j)->board_id[32]);
 500          sh[j]->hostt->use_clustering = DISABLE_CLUSTERING;
 501          sh[j]->sg_tablesize = MAX_SAFE_SGLIST;
 502          }
 503       }
 504 
 505    printk("%s: PORT 0x%03x, BIOS 0x%05x, IRQ %u, DMA %u, SG %d, "\
 506           "Mbox %d, CmdLun %d, C%d.\n", BN(j), sh[j]->io_port, 
 507           (int)sh[j]->base, sh[j]->irq, 
 508           sh[j]->dma_channel, sh[j]->sg_tablesize, 
 509           sh[j]->can_queue, sh[j]->cmd_per_lun,
 510           sh[j]->hostt->use_clustering);
 511    return TRUE;
 512 }
 513 
 514 int u14_34f_detect (Scsi_Host_Template * tpnt) {
     /*  */
 515    unsigned int j = 0, k, flags;
 516 
 517    ushort io_port[] = {
 518       0x330, 0x340, 0x230, 0x240, 0x210, 0x130, 0x140, 0x0
 519       };
 520 
 521    ushort *port_base = io_port;
 522 
 523    tpnt->proc_dir = &proc_scsi_u14_34f;
 524 
 525    save_flags(flags);
 526    cli();
 527 
 528    for (k = 0; k < MAX_IRQ; k++) {
 529       irqlist[k] = NO_IRQ;
 530       calls[k] = 0;
 531       }
 532 
 533    for (k = 0; k < MAX_BOARDS + 1; k++) sh[k] = NULL;
 534 
 535    while (*port_base) {
 536 
 537       if (j < MAX_BOARDS && port_detect(port_base, j, tpnt)) j++;
 538 
 539       port_base++;
 540       }
 541 
 542    if (j > 0) 
 543       printk("UltraStor 14F/34F: Copyright (C) 1994, 1995 Dario Ballabio.\n");
 544 
 545    restore_flags(flags);
 546    return j;
 547 }
 548 
 549 static inline void build_sg_list(struct mscp *cpp, Scsi_Cmnd *SCpnt) {
     /*  */
 550    unsigned int k, data_len = 0;
 551    struct scatterlist * sgpnt;
 552 
 553    sgpnt = (struct scatterlist *) SCpnt->request_buffer;
 554 
 555    for (k = 0; k < SCpnt->use_sg; k++) {
 556       cpp->sglist[k].address = (unsigned int) sgpnt[k].address;
 557       cpp->sglist[k].num_bytes = sgpnt[k].length;
 558       data_len += sgpnt[k].length;
 559       }
 560 
 561    cpp->use_sg = SCpnt->use_sg;
 562    cpp->data_address = (unsigned int) cpp->sglist;
 563    cpp->data_len = data_len;
 564 }
 565 
 566 int u14_34f_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *)) {
     /*  */
 567    unsigned int i, j, k, flags;
 568    struct mscp *cpp;
 569 
 570    save_flags(flags);
 571    cli();
 572    /* j is the board number */
 573    j = ((struct hostdata *) SCpnt->host->hostdata)->board_number;
 574 
 575    if (!done) panic("%s: qcomm, pid %ld, null done.\n", BN(j), SCpnt->pid);
 576 
 577    /* i is the mailbox number, look for the first free mailbox 
 578       starting from last_cp_used */
 579    i = HD(j)->last_cp_used + 1;
 580 
 581    for (k = 0; k < sh[j]->can_queue; k++, i++) {
 582 
 583       if (i >= sh[j]->can_queue) i = 0;
 584 
 585       if (HD(j)->cp_stat[i] == FREE) {
 586          HD(j)->last_cp_used = i;
 587          break;
 588          }
 589       }
 590 
 591    if (k == sh[j]->can_queue) {
 592       printk("%s: qcomm, no free mailbox, resetting.\n", BN(j));
 593 
 594       if (HD(j)->in_reset) 
 595          printk("%s: qcomm, already in reset.\n", BN(j));
 596       else if (u14_34f_reset(SCpnt) == SCSI_RESET_SUCCESS) 
 597          panic("%s: qcomm, SCSI_RESET_SUCCESS.\n", BN(j));
 598 
 599       SCpnt->result = DID_BUS_BUSY << 16; 
 600       SCpnt->host_scribble = NULL;
 601       printk("%s: qcomm, pid %ld, DID_BUS_BUSY, done.\n", BN(j), SCpnt->pid);
 602       restore_flags(flags);
 603       done(SCpnt);    
 604       return 0;
 605       }
 606 
 607    /* Set pointer to control packet structure */
 608    cpp = &HD(j)->cp[i];
 609 
 610    memset(cpp, 0, sizeof(struct mscp));
 611    SCpnt->scsi_done = done;
 612    cpp->index = i;
 613    SCpnt->host_scribble = (unsigned char *) &cpp->index;
 614 
 615    if (do_trace) printk("%s: qcomm, mbox %d, target %d, pid %ld.\n",
 616                         BN(j), i, SCpnt->target, SCpnt->pid);
 617 
 618    cpp->opcode = OP_SCSI;
 619    cpp->xdir = DTD_SCSI;
 620    cpp->target = SCpnt->target;
 621    cpp->lun = SCpnt->lun;
 622    cpp->SCpnt = SCpnt;
 623    cpp->sense_addr = (unsigned int) SCpnt->sense_buffer;
 624    cpp->sense_len = sizeof SCpnt->sense_buffer;
 625 
 626    if (SCpnt->use_sg) {
 627       cpp->sg = TRUE;
 628       build_sg_list(cpp, SCpnt);
 629       }
 630    else {
 631       cpp->data_address = (unsigned int)SCpnt->request_buffer;
 632       cpp->data_len = SCpnt->request_bufflen;
 633       }
 634 
 635    cpp->scsi_cdbs_len = SCpnt->cmd_len;
 636    memcpy(cpp->scsi_cdbs, SCpnt->cmnd, cpp->scsi_cdbs_len);
 637 
 638    if (wait_on_busy(sh[j]->io_port)) {
 639       SCpnt->result = DID_ERROR << 16;
 640       SCpnt->host_scribble = NULL;
 641       printk("%s: qcomm, target %d, pid %ld, adapter busy, DID_ERROR, done.\n", 
 642              BN(j), SCpnt->target, SCpnt->pid);
 643       restore_flags(flags);
 644       done(SCpnt);
 645       return 0;
 646       }
 647 
 648    /* Store pointer in OGM address bytes */
 649    outl((unsigned int)cpp, sh[j]->io_port + REG_OGM);
 650 
 651    /* Issue OGM interrupt */
 652    outb(CMD_OGM_INTR, sh[j]->io_port + REG_LCL_INTR);
 653 
 654    HD(j)->cp_stat[i] = IN_USE;
 655    restore_flags(flags);
 656    return 0;
 657 }
 658 
 659 int u14_34f_abort(Scsi_Cmnd *SCarg) {
     /*  */
 660    unsigned int i, j, flags;
 661 
 662    save_flags(flags);
 663    cli();
 664    j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
 665 
 666    if (SCarg->host_scribble == NULL) {
 667       printk("%s: abort, target %d, pid %ld inactive.\n",
 668              BN(j), SCarg->target, SCarg->pid);
 669       restore_flags(flags);
 670       return SCSI_ABORT_NOT_RUNNING;
 671       }
 672 
 673    i = *(unsigned int *)SCarg->host_scribble;
 674    printk("%s: abort, mbox %d, target %d, pid %ld.\n",
 675           BN(j), i, SCarg->target, SCarg->pid);
 676 
 677    if (i >= sh[j]->can_queue)
 678       panic("%s: abort, invalid SCarg->host_scribble.\n", BN(j));
 679 
 680    if (wait_on_busy(sh[j]->io_port)) {
 681       printk("%s: abort, timeout error.\n", BN(j));
 682       restore_flags(flags);
 683       return SCSI_ABORT_ERROR;
 684       }
 685 
 686    if (HD(j)->cp_stat[i] == FREE) {
 687       printk("%s: abort, mbox %d is free.\n", BN(j), i);
 688       restore_flags(flags);
 689       return SCSI_ABORT_NOT_RUNNING;
 690       }
 691 
 692    if (HD(j)->cp_stat[i] == IN_USE) {
 693       printk("%s: abort, mbox %d is in use.\n", BN(j), i);
 694 
 695       if (SCarg != HD(j)->cp[i].SCpnt)
 696          panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
 697                BN(j), i, SCarg, HD(j)->cp[i].SCpnt);
 698 
 699       restore_flags(flags);
 700       return SCSI_ABORT_SNOOZE;
 701       }
 702 
 703    if (HD(j)->cp_stat[i] == IN_RESET) {
 704       printk("%s: abort, mbox %d is in reset.\n", BN(j), i);
 705       restore_flags(flags);
 706       return SCSI_ABORT_ERROR;
 707       }
 708 
 709    if (HD(j)->cp_stat[i] == LOCKED) {
 710       printk("%s: abort, mbox %d is locked.\n", BN(j), i);
 711       restore_flags(flags);
 712       return SCSI_ABORT_NOT_RUNNING;
 713       }
 714    restore_flags(flags);
 715    panic("%s: abort, mbox %d, invalid cp_stat.\n", BN(j), i);
 716 }
 717 
 718 int u14_34f_reset(Scsi_Cmnd * SCarg) {
     /*  */
 719    unsigned int i, j, flags, time, k, limit = 0;
 720    int arg_done = FALSE;
 721    Scsi_Cmnd *SCpnt;
 722 
 723    save_flags(flags);
 724    cli();
 725    j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
 726    printk("%s: reset, enter, target %d, pid %ld.\n", 
 727           BN(j), SCarg->target, SCarg->pid);
 728 
 729    if (SCarg->host_scribble == NULL)
 730       printk("%s: reset, pid %ld inactive.\n", BN(j), SCarg->pid);
 731 
 732    if (HD(j)->in_reset) {
 733       printk("%s: reset, exit, already in reset.\n", BN(j));
 734       restore_flags(flags);
 735       return SCSI_RESET_ERROR;
 736       }
 737 
 738    if (wait_on_busy(sh[j]->io_port)) {
 739       printk("%s: reset, exit, timeout error.\n", BN(j));
 740       restore_flags(flags);
 741       return SCSI_RESET_ERROR;
 742       }
 743 
 744    for (k = 0; k < MAX_TARGET; k++) HD(j)->target_reset[k] = TRUE;
 745 
 746    for (k = 0; k < MAX_TARGET; k++) HD(j)->target_time_out[k] = 0;
 747 
 748    for (i = 0; i < sh[j]->can_queue; i++) {
 749 
 750       if (HD(j)->cp_stat[i] == FREE) continue;
 751 
 752       if (HD(j)->cp_stat[i] == LOCKED) {
 753          HD(j)->cp_stat[i] = FREE;
 754          printk("%s: reset, locked mbox %d forced free.\n", BN(j), i);
 755          continue;
 756          }
 757 
 758       SCpnt = HD(j)->cp[i].SCpnt;
 759       HD(j)->cp_stat[i] = IN_RESET;
 760       printk("%s: reset, mbox %d in reset, pid %ld.\n",
 761              BN(j), i, SCpnt->pid);
 762 
 763       if (SCpnt == NULL)
 764          panic("%s: reset, mbox %d, SCpnt == NULL.\n", BN(j), i);
 765 
 766       if (SCpnt->host_scribble == NULL)
 767          panic("%s: reset, mbox %d, garbled SCpnt.\n", BN(j), i);
 768 
 769       if (*(unsigned int *)SCpnt->host_scribble != i) 
 770          panic("%s: reset, mbox %d, index mismatch.\n", BN(j), i);
 771 
 772       if (SCpnt->scsi_done == NULL) 
 773          panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n", BN(j), i);
 774 
 775       if (SCpnt == SCarg) arg_done = TRUE;
 776       }
 777 
 778    if (wait_on_busy(sh[j]->io_port)) {
 779       printk("%s: reset, cannot reset, timeout error.\n", BN(j));
 780       restore_flags(flags);
 781       return SCSI_RESET_ERROR;
 782       }
 783 
 784    outb(CMD_RESET, sh[j]->io_port + REG_LCL_INTR);
 785    printk("%s: reset, board reset done, enabling interrupts.\n", BN(j));
 786 
 787 #if defined (DEBUG_RESET)
 788    do_trace = TRUE;
 789 #endif
 790 
 791    HD(j)->in_reset = TRUE;
 792    sti();
 793    time = jiffies;
 794    while (jiffies < (time + 100) && limit++ < 100000000);
 795    cli();
 796    printk("%s: reset, interrupts disabled, loops %d.\n", BN(j), limit);
 797 
 798    for (i = 0; i < sh[j]->can_queue; i++) {
 799 
 800       /* Skip mailboxes already set free by interrupt */
 801       if (HD(j)->cp_stat[i] != IN_RESET) continue;
 802 
 803       SCpnt = HD(j)->cp[i].SCpnt;
 804       SCpnt->result = DID_RESET << 16;
 805       SCpnt->host_scribble = NULL;
 806 
 807       /* This mailbox is still waiting for its interrupt */
 808       HD(j)->cp_stat[i] = LOCKED;
 809 
 810       printk("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
 811              BN(j), i, SCpnt->pid);
 812       restore_flags(flags);
 813       SCpnt->scsi_done(SCpnt);
 814       cli();
 815       }
 816 
 817    HD(j)->in_reset = FALSE;
 818    do_trace = FALSE;
 819    restore_flags(flags);
 820 
 821    if (arg_done) {
 822       printk("%s: reset, exit, success.\n", BN(j));
 823       return SCSI_RESET_SUCCESS;
 824       }
 825    else {
 826       printk("%s: reset, exit, wakeup.\n", BN(j));
 827       return SCSI_RESET_PUNT;
 828       }
 829 }
 830 
 831 int u14_34f_biosparam(Disk * disk, kdev_t dev, int * dkinfo) {
     /*  */
 832    unsigned int j = 0;
 833    int size = disk->capacity;
 834 
 835    dkinfo[0] = HD(j)->heads;
 836    dkinfo[1] = HD(j)->sectors;
 837    dkinfo[2] = size / (HD(j)->heads * HD(j)->sectors);
 838    return 0;
 839 }
 840 
 841 static void u14_34f_interrupt_handler(int irq, void *dev_id, struct pt_regs * regs) {
     /*  */
 842    Scsi_Cmnd *SCpnt;
 843    unsigned int i, j, k, flags, status, tstatus, loops, total_loops = 0;
 844    struct mscp *spp;
 845 
 846    save_flags(flags);
 847    cli();
 848 
 849    if (irqlist[irq] == NO_IRQ) {
 850       printk("%s, ihdlr, irq %d, unexpected interrupt.\n", driver_name, irq);
 851       restore_flags(flags);
 852       return;
 853       }
 854 
 855    if (do_trace) printk("%s: ihdlr, enter, irq %d, calls %d.\n", 
 856                         driver_name, irq, calls[irq]);
 857 
 858    /* Service all the boards configured on this irq */
 859    for (j = 0; sh[j] != NULL; j++) {
 860 
 861       if (sh[j]->irq != irq) continue;
 862 
 863       loops = 0;
 864 
 865       /* Loop until all interrupts for a board are serviced */
 866       while (inb(sh[j]->io_port + REG_SYS_INTR) & IRQ_ASSERTED) {
 867          total_loops++;
 868          loops++;
 869 
 870          if (do_trace) printk("%s: ihdlr, start service, count %d.\n",
 871                               BN(j), HD(j)->iocount);
 872 
 873          spp = (struct mscp *)inl(sh[j]->io_port + REG_ICM);
 874 
 875          /* Clear interrupt pending flag */
 876          outb(CMD_CLR_INTR, sh[j]->io_port + REG_SYS_INTR);
 877 
 878          i = spp - HD(j)->cp;
 879 
 880          if (i >= sh[j]->can_queue)
 881             panic("%s: ihdlr, invalid mscp address.\n", BN(j));
 882 
 883          if (HD(j)->cp_stat[i] == IGNORE) {
 884             HD(j)->cp_stat[i] = FREE;
 885             continue;
 886             }
 887          else if (HD(j)->cp_stat[i] == LOCKED) {
 888             HD(j)->cp_stat[i] = FREE;
 889             printk("%s: ihdlr, mbox %d unlocked, count %d.\n",
 890                    BN(j), i, HD(j)->iocount);
 891             continue;
 892             }
 893          else if (HD(j)->cp_stat[i] == FREE) {
 894             printk("%s: ihdlr, mbox %d is free, count %d.\n", 
 895                    BN(j), i, HD(j)->iocount);
 896             continue;
 897             }
 898          else if (HD(j)->cp_stat[i] == IN_RESET)
 899             printk("%s: ihdlr, mbox %d is in reset.\n", BN(j), i);
 900          else if (HD(j)->cp_stat[i] != IN_USE) 
 901             panic("%s: ihdlr, mbox %d, invalid cp_stat.\n", BN(j), i);
 902 
 903          HD(j)->cp_stat[i] = FREE;
 904          SCpnt = spp->SCpnt;
 905 
 906          if (SCpnt == NULL) 
 907             panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", BN(j), i);
 908 
 909          if (SCpnt->host_scribble == NULL) 
 910             panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n",
 911                   BN(j), i, SCpnt->pid, SCpnt);
 912 
 913          if (*(unsigned int *)SCpnt->host_scribble != i) 
 914             panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d,"\
 915                   " irq %d.\n", BN(j), i, SCpnt->pid, 
 916                   *(unsigned int *)SCpnt->host_scribble, irq);
 917 
 918          tstatus = status_byte(spp->target_status);
 919 
 920          switch (spp->adapter_status) {
 921             case ASOK:     /* status OK */
 922 
 923                /* Forces a reset if a disk drive keeps returning BUSY */
 924                if (tstatus == BUSY && SCpnt->device->type != TYPE_TAPE) 
 925                   status = DID_ERROR << 16;
 926 
 927                /* If there was a bus reset, redo operation on each target */
 928                else if (tstatus != GOOD
 929                         && SCpnt->device->type == TYPE_DISK
 930                         && HD(j)->target_reset[SCpnt->target])
 931                   status = DID_BUS_BUSY << 16;
 932 
 933                /* Works around a flaw in scsi.c */
 934                else if (tstatus == CHECK_CONDITION
 935                         && SCpnt->device->type == TYPE_DISK
 936                         && (SCpnt->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
 937                   status = DID_BUS_BUSY << 16;
 938 
 939                else
 940                   status = DID_OK << 16;
 941 
 942                if (tstatus == GOOD)
 943                   HD(j)->target_reset[SCpnt->target] = FALSE;
 944 
 945                if (spp->target_status && SCpnt->device->type == TYPE_DISK)
 946                   printk("%s: ihdlr, target %d:%d, pid %ld, target_status "\
 947                          "0x%x, sense key 0x%x.\n", BN(j), 
 948                          SCpnt->target, SCpnt->lun, SCpnt->pid,
 949                          spp->target_status, SCpnt->sense_buffer[2]);
 950 
 951                HD(j)->target_time_out[SCpnt->target] = 0;
 952 
 953                break;
 954             case ASST:     /* Selection Time Out */
 955 
 956                if (HD(j)->target_time_out[SCpnt->target] > 1)
 957                   status = DID_ERROR << 16;
 958                else {
 959                   status = DID_TIME_OUT << 16;
 960                   HD(j)->target_time_out[SCpnt->target]++;
 961                   }
 962 
 963                break;
 964             case 0x92:     /* Data over/under-run */
 965             case 0x93:     /* Unexpected bus free */
 966             case 0x94:     /* Target bus phase sequence failure */
 967             case 0x96:     /* Illegal SCSI command */
 968             case 0xa3:     /* SCSI bus reset error */
 969 
 970                if (SCpnt->device->type != TYPE_TAPE)
 971                   status = DID_BUS_BUSY << 16;
 972                else
 973                   status = DID_ERROR << 16;
 974 
 975                for (k = 0; k < MAX_TARGET; k++) 
 976                   HD(j)->target_reset[k] = TRUE;
 977 
 978                break;
 979             case 0x01:     /* Invalid command */
 980             case 0x02:     /* Invalid parameters */
 981             case 0x03:     /* Invalid data list */
 982             case 0x84:     /* SCSI bus abort error */
 983             case 0x9b:     /* Auto request sense error */
 984             case 0x9f:     /* Unexpected command complete message error */
 985             case 0xff:     /* Invalid parameter in the S/G list */
 986             default:
 987                status = DID_ERROR << 16;
 988                break;
 989             }
 990 
 991          SCpnt->result = status | spp->target_status;
 992          HD(j)->iocount++;
 993 
 994          if (loops > 1) HD(j)->multicount++;
 995 
 996 #if defined (DEBUG_INTERRUPT)
 997          if (SCpnt->result || do_trace) 
 998 #else
 999          if ((spp->adapter_status != ASOK && HD(j)->iocount >  1000) ||
1000              (spp->adapter_status != ASOK && 
1001               spp->adapter_status != ASST && HD(j)->iocount <= 1000) ||
1002              do_trace)
1003 #endif
1004             printk("%s: ihdlr, mbox %d, err 0x%x:%x,"\
1005                    " target %d:%d, pid %ld, count %d.\n",
1006                    BN(j), i, spp->adapter_status, spp->target_status,
1007                    SCpnt->target, SCpnt->lun, SCpnt->pid, HD(j)->iocount);
1008 
1009          /* Set the command state to inactive */
1010          SCpnt->host_scribble = NULL;
1011 
1012          restore_flags(flags);
1013          SCpnt->scsi_done(SCpnt);
1014          cli();
1015 
1016          }   /* Multiple command loop */
1017 
1018       }   /* Boards loop */
1019 
1020    calls[irq]++;
1021 
1022    if (total_loops == 0) 
1023      printk("%s: ihdlr, irq %d, no command completed, calls %d.\n",
1024             driver_name, irq, calls[irq]);
1025 
1026    if (do_trace) printk("%s: ihdlr, exit, irq %d, calls %d.\n",
1027                         driver_name, irq, calls[irq]);
1028 
1029 #if defined (DEBUG_STATISTICS)
1030    if ((calls[irq] % 100000) == 10000)
1031       for (j = 0; sh[j] != NULL; j++)
1032          printk("%s: ihdlr, calls %d, count %d, multi %d.\n", BN(j),
1033                 calls[(sh[j]->irq)], HD(j)->iocount, HD(j)->multicount);
1034 #endif
1035 
1036    restore_flags(flags);
1037    return;
1038 }
1039 
1040 #if defined(MODULE)
1041 Scsi_Host_Template driver_template = ULTRASTOR_14_34F;
1042 
1043 #include "scsi_module.c"
1044 #endif
/* */
root/drivers/scsi/u14-34f.c

DEFINITIONS
