constants.c

基于组件方式开发操作系统的OSKIT源代码

  {0x50,0x01,T,"Write append position error"},
  {0x50,0x02,T,"Position error related to timing"},
  {0x51,0x00,T|O,"Erase failure"},
  {0x52,0x00,T,"Cartridge fault"},
  {0x53,0x00,D|T|L|W|R|S|O|M,"Media load or eject failed"},
  {0x53,0x01,T,"Unload tape failure"},
  {0x53,0x02,D|T|W|R|O|M,"Medium removal prevented"},
  {0x54,0x00,P,"Scsi to host system interface failure"},
  {0x55,0x00,P,"System resource failure"},
  {0x57,0x00,R,"Unable to recover table-of-contents"},
  {0x58,0x00,O,"Generation does not exist"},
  {0x59,0x00,O,"Updated block read"},
  {0x5A,0x00,D|T|L|P|W|R|S|O|M,"Operator request or state change input (unspecified)"},
  {0x5A,0x01,D|T|W|R|O|M,"Operator medium removal request"},
  {0x5A,0x02,D|T|W|O,"Operator selected write protect"},
  {0x5A,0x03,D|T|W|O,"Operator selected write permit"},
  {0x5B,0x00,D|T|L|P|W|R|S|O|M,"Log exception"},
  {0x5B,0x01,D|T|L|P|W|R|S|O|M,"Threshold condition met"},
  {0x5B,0x02,D|T|L|P|W|R|S|O|M,"Log counter at maximum"},
  {0x5B,0x03,D|T|L|P|W|R|S|O|M,"Log list codes exhausted"},
  {0x5C,0x00,D|O,"Rpl status change"},
  {0x5C,0x01,D|O,"Spindles synchronized"},
  {0x5C,0x02,D|O,"Spindles not synchronized"},
  {0x60,0x00,S,"Lamp failure"},
  {0x61,0x00,S,"Video acquisition error"},
  {0x61,0x01,S,"Unable to acquire video"},
  {0x61,0x02,S,"Out of focus"},
  {0x62,0x00,S,"Scan head positioning error"},
  {0x63,0x00,R,"End of user area encountered on this track"},
  {0x64,0x00,R,"Illegal mode for this track"},
  {0, 0, 0, NULL}
};
#endif

#if (CONSTANTS & CONST_SENSE)
static const char *snstext[] = {
    "None",                     /* There is no sense information */
    "Recovered Error",          /* The last command completed successfully
                                   but used error correction */
    "Not Ready",                /* The addressed target is not ready */
    "Medium Error",             /* Data error detected on the medium */
    "Hardware Error",           /* Controller or device failure */
    "Illegal Request",
    "Unit Attention",           /* Removable medium was changed, or
                                   the target has been reset */
    "Data Protect",             /* Access to the data is blocked */
    "Blank Check",              /* Reached unexpected written or unwritten
                                   region of the medium */
    "Key=9",                    /* Vendor specific */
    "Copy Aborted",             /* COPY or COMPARE was aborted */
    "Aborted Command",          /* The target aborted the command */
    "Equal",                    /* A SEARCH DATA command found data equal */
    "Volume Overflow",          /* Medium full with still data to be written */
    "Miscompare",               /* Source data and data on the medium
                                   do not agree */
    "Key=15"                    /* Reserved */
};
#endif

/* Print sense information */
void print_sense(const char * devclass, Scsi_Cmnd * SCpnt)
{
    int i, s;
    int sense_class, valid, code;
    unsigned char * sense_buffer = SCpnt->sense_buffer;
    const char * error = NULL;
    
    sense_class = (sense_buffer[0] >> 4) & 0x07;
    code = sense_buffer[0] & 0xf;
    valid = sense_buffer[0] & 0x80;
    
    if (sense_class == 7) {	/* extended sense data */
	s = sense_buffer[7] + 8;
	if(s > sizeof(SCpnt->sense_buffer))
           s = sizeof(SCpnt->sense_buffer);
	
	if (!valid)
	    printk("[valid=0] ");
	printk("Info fld=0x%x, ", (int)((sense_buffer[3] << 24) |
	       (sense_buffer[4] << 16) | (sense_buffer[5] << 8) |
	       sense_buffer[6]));
	if (sense_buffer[2] & 0x80)
           printk( "FMK ");	/* current command has read a filemark */
	if (sense_buffer[2] & 0x40)
           printk( "EOM ");	/* end-of-medium condition exists */
	if (sense_buffer[2] & 0x20)
           printk( "ILI ");	/* incorrect block length requested */
	
	switch (code) {
	case 0x0:
	    error = "Current";	/* error concerns current command */
	    break;
	case 0x1:
	    error = "Deferred";	/* error concerns some earlier command */
            	/* e.g., an earlier write to disk cache succeeded, but
                   now the disk discovers that it cannot write the data */
	    break;
	default:
	    error = "Invalid";
	}
	
	printk("%s ", error);
	
#if (CONSTANTS & CONST_SENSE)
	printk( "%s%s: sense key %s\n", devclass,
	       kdevname(SCpnt->request.rq_dev), snstext[sense_buffer[2] & 0x0f]);
#else
	printk("%s%s: sns = %2x %2x\n", devclass,
	       kdevname(SCpnt->request.rq_dev), sense_buffer[0], sense_buffer[2]);
#endif
	
	/* Check to see if additional sense information is available */
	if(sense_buffer[7] + 7 < 13 ||
	   (sense_buffer[12] == 0  && sense_buffer[13] ==  0)) goto done;
	
#if (CONSTANTS & CONST_XSENSE)
	for(i=0; additional[i].text; i++)
	    if(additional[i].code1 == sense_buffer[12] &&
	       additional[i].code2 == sense_buffer[13])
		printk("Additional sense indicates %s\n", additional[i].text);
	
	for(i=0; additional2[i].text; i++)
	    if(additional2[i].code1 == sense_buffer[12] &&
	       additional2[i].code2_min >= sense_buffer[13]  &&
	       additional2[i].code2_max <= sense_buffer[13]) {
		printk("Additional sense indicates ");
		printk(additional2[i].text, sense_buffer[13]);
		printk("\n");
	    };
#else
	printk("ASC=%2x ASCQ=%2x\n", sense_buffer[12], sense_buffer[13]);
#endif
    } else {	/* non-extended sense data */

         /*
          * Standard says:
          *    sense_buffer[0] & 0200 : address valid
          *    sense_buffer[0] & 0177 : vendor-specific error code
          *    sense_buffer[1] & 0340 : vendor-specific
          *    sense_buffer[1..3] : 21-bit logical block address
          */
	
#if (CONSTANTS & CONST_SENSE)
	if (sense_buffer[0] < 15)
	    printk("%s%s: old sense key %s\n", devclass,
	      kdevname(SCpnt->request.rq_dev), snstext[sense_buffer[0] & 0x0f]);
	else
#endif
	    printk("%s%s: sns = %2x %2x\n", devclass,
	      kdevname(SCpnt->request.rq_dev), sense_buffer[0], sense_buffer[2]);
	
	printk("Non-extended sense class %d code 0x%0x ", sense_class, code);
	s = 4;
    }
    
 done:
#if !(CONSTANTS & CONST_SENSE)
    printk("Raw sense data:");
    for (i = 0; i < s; ++i) 
	printk("0x%02x ", sense_buffer[i]);
    printk("\n");
#endif
    return;
}

#if (CONSTANTS & CONST_MSG) 
static const char *one_byte_msgs[] = {
/* 0x00 */ "Command Complete", NULL, "Save Pointers",
/* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", 
/* 0x06 */ "Abort", "Message Reject", "Nop", "Message Parity Error",
/* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag",
/* 0x0c */ "Bus device reset", "Abort Tag", "Clear Queue", 
/* 0x0f */ "Initiate Recovery", "Release Recovery"
};

#define NO_ONE_BYTE_MSGS (sizeof(one_byte_msgs)  / sizeof (const char *))

static const char *two_byte_msgs[] = {
/* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag"
/* 0x23 */ "Ignore Wide Residue"
};

#define NO_TWO_BYTE_MSGS (sizeof(two_byte_msgs)  / sizeof (const char *))

static const char *extended_msgs[] = {
/* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request",
/* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request"
};

#define NO_EXTENDED_MSGS (sizeof(two_byte_msgs)  / sizeof (const char *))
#endif /* (CONSTANTS & CONST_MSG) */

int print_msg (const unsigned char *msg) {
    int len = 0, i;
    if (msg[0] == EXTENDED_MESSAGE) {
	len = 3 + msg[1];
#if (CONSTANTS & CONST_MSG)
	if (msg[2] < NO_EXTENDED_MSGS)
	    printk ("%s ", extended_msgs[msg[2]]); 
	else 
	    printk ("Extended Message, reserved code (0x%02x) ", (int) msg[2]);
	switch (msg[2]) {
	case EXTENDED_MODIFY_DATA_POINTER:
	    printk("pointer = %d", (int) (msg[3] << 24) | (msg[4] << 16) | 
		   (msg[5] << 8) | msg[6]);
	    break;
	case EXTENDED_SDTR:
	    printk("period = %d ns, offset = %d", (int) msg[3] * 4, (int) 
		   msg[4]);
	    break;
	case EXTENDED_WDTR:
	    printk("width = 2^%d bytes", msg[3]);
	    break;
	default:
	    for (i = 2; i < len; ++i) 
		printk("%02x ", msg[i]);
	}
#else
	for (i = 0; i < len; ++i)
	    printk("%02x ", msg[i]);
#endif
	/* Identify */
    } else if (msg[0] & 0x80) {
#if (CONSTANTS & CONST_MSG)
	printk("Identify disconnect %sallowed %s %d ",
	       (msg[0] & 0x40) ? "" : "not ",
	       (msg[0] & 0x20) ? "target routine" : "lun",
	       msg[0] & 0x7);
#else
	printk("%02x ", msg[0]);
#endif
	len = 1;
	/* Normal One byte */
    } else if (msg[0] < 0x1f) {
#if (CONSTANTS & CONST_MSG)
	if (msg[0] < NO_ONE_BYTE_MSGS)
	    printk(one_byte_msgs[msg[0]]);
	else
	    printk("reserved (%02x) ", msg[0]);
#else
	printk("%02x ", msg[0]);
#endif
	len = 1;
	/* Two byte */
    } else if (msg[0] <= 0x2f) {
#if (CONSTANTS & CONST_MSG)
	if ((msg[0] - 0x20) < NO_TWO_BYTE_MSGS)
	    printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], 
		   msg[1]);
	else 
	    printk("reserved two byte (%02x %02x) ", 
		   msg[0], msg[1]);
#else
	printk("%02x %02x", msg[0], msg[1]);
#endif
	len = 2;
    } else 
#if (CONSTANTS & CONST_MSG)
	printk(reserved);
#else
    printk("%02x ", msg[0]);
#endif
    return len;
}

void print_Scsi_Cmnd (Scsi_Cmnd *cmd) {
    printk("scsi%d : destination target %d, lun %d\n", 
	   cmd->host->host_no, 
	   cmd->target, 
	   cmd->lun);
    printk("        command = ");
    print_command (cmd->cmnd);
}

#if (CONSTANTS & CONST_HOST)
static const char * hostbyte_table[]={
"DID_OK", "DID_NO_CONNECT", "DID_BUS_BUSY", "DID_TIME_OUT", "DID_BAD_TARGET", 
"DID_ABORT", "DID_PARITY", "DID_ERROR", "DID_RESET", "DID_BAD_INTR",
"DID_PASSTHROUGH", "DID_SOFT_ERROR", NULL};

void print_hostbyte(int scsiresult)
{   static int maxcode=0;
    int i;
   
    if(!maxcode) {
	for(i=0;hostbyte_table[i];i++) ;
	maxcode=i-1;
    }
    printk("Hostbyte=0x%02x",host_byte(scsiresult));
    if(host_byte(scsiresult)>maxcode) {
	printk("is invalid "); 
	return;
    }
    printk("(%s) ",hostbyte_table[host_byte(scsiresult)]);
}
#else
void print_hostbyte(int scsiresult)
{   printk("Hostbyte=0x%02x ",host_byte(scsiresult));
}
#endif

#if (CONSTANTS & CONST_DRIVER)
static const char * driverbyte_table[]={
"DRIVER_OK", "DRIVER_BUSY", "DRIVER_SOFT",  "DRIVER_MEDIA", "DRIVER_ERROR", 
"DRIVER_INVALID", "DRIVER_TIMEOUT", "DRIVER_HARD",NULL };

static const char * driversuggest_table[]={"SUGGEST_OK",
"SUGGEST_RETRY", "SUGGEST_ABORT", "SUGGEST_REMAP", "SUGGEST_DIE",
unknown,unknown,unknown, "SUGGEST_SENSE",NULL};


void print_driverbyte(int scsiresult)
{   static int driver_max=0,suggest_max=0;
    int i,dr=driver_byte(scsiresult)&DRIVER_MASK, 
	su=(driver_byte(scsiresult)&SUGGEST_MASK)>>4;

    if(!driver_max) {
        for(i=0;driverbyte_table[i];i++) ;
        driver_max=i;
	for(i=0;driversuggest_table[i];i++) ;
	suggest_max=i;
    }
    printk("Driverbyte=0x%02x",driver_byte(scsiresult));
    printk("(%s,%s) ",
	dr<driver_max  ? driverbyte_table[dr]:"invalid",
	su<suggest_max ? driversuggest_table[su]:"invalid");
}
#else
void print_driverbyte(int scsiresult)
{   printk("Driverbyte=0x%02x ",driver_byte(scsiresult));
}
#endif

/*
 * Overrides for Emacs so that we almost follow Linus's tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-indent-level: 4
 * c-brace-imaginary-offset: 0
 * c-brace-offset: -4
 * c-argdecl-indent: 4
 * c-label-offset: -4
 * c-continued-statement-offset: 4
 * c-continued-brace-offset: 0
 * indent-tabs-mode: nil
 * tab-width: 8
 * End:
 */