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Annotation of driverkit/Examples/UnixDisk/SCSIDisk.m, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: /*     SCSIDisk.m      1.0     01/02/91        (c) 1991 NeXT   
        !            25:  *
        !            26:  * SCSIDisk.m - Implementation for SCSI Disk class. 
        !            27:  *
        !            28:  * HISTORY
        !            29:  * 01-Feb-91    Doug Mitchell at NeXT
        !            30:  *      Created. 
        !            31:  */
        !            32:  
        !            33: #import <bsd/sys/types.h>
        !            34: #import <bsd/libc.h>
        !            35: #import <bsd/sys/file.h>
        !            36: #import "SCSIDisk.h"
        !            37: #import <bsd/dev/scsireg.h>
        !            38: #import <bsd/dev/disk.h>
        !            39: #import <errno.h>
        !            40: #import "unixDiskUxpr.h"
        !            41: #import <driverkit/volCheck.h>
        !            42: 
        !            43: #define NUM_SCSI_THREADS       2
        !            44: #define SCSI_RAW_NAME          "sd"
        !            45: 
        !            46: @implementation SCSIDisk
        !            47: 
        !            48: /*
        !            49:  * Probe hardware to determine how many instances to alloc and init. This 
        !            50:  * is a hard coded kludge for now.
        !            51:  */
        !            52: #if    0
        !            53: + (void)IOProbe:serverId
        !            54: {
        !            55:        int     scsi_unit;
        !            56:        id      scsiId = nil;
        !            57:        
        !            58:        /*
        !            59:         * Attempt to instantiate and init each possible scsi disk.
        !            60:         */
        !            61:        for(scsi_unit=SCSI_UNIT_MIN; scsi_unit<=SCSI_UNIT_MAX; scsi_unit++) {
        !            62:                if(scsiId == nil)
        !            63:                        scsiId = [self alloc];
        !            64:                
        !            65:                /*
        !            66:                 * Avoid free/alloc if this init fails.
        !            67:                 */
        !            68:                if([scsiId SCSIInit:scsi_unit 
        !            69:                    sender:serverId] == nil) 
        !            70:                        continue;
        !            71:                else {
        !            72:                        /*
        !            73:                         * Success. Have DiskObject superclass take care of 
        !            74:                         * the rest.
        !            75:                         */
        !            76:                        [scsiId registerDevice];
        !            77:                        [scsiId registerDisk];
        !            78:                        scsiId = nil;
        !            79:                }
        !            80:        }
        !            81:        if(scsiId)
        !            82:                [scsiId free];
        !            83: }
        !            84: 
        !            85: #endif 0
        !            86: 
        !            87: /*
        !            88:  * init one instance for specified disk.
        !            89:  */
        !            90: - SCSIInit:(int)diskNum
        !            91: {
        !            92:        char *name;
        !            93:        int thread_num;
        !            94:        
        !            95:        xpr_ud("SCSIDisk : init: diskNum %d\n", diskNum, 2,3,4,5);
        !            96:        
        !            97:        [self setUnit:diskNum];
        !            98:        name = malloc(10);
        !            99:        sprintf(name, "%s%d", SCSI_RAW_NAME, diskNum);
        !           100:        [self setName:(const char *)name];
        !           101:        [self setDeviceKind:"Unix SCSI Disk"];
        !           102:        [self setLocation:NULL];
        !           103:        [self setDriveName:"Unix SCSI Disk"];
        !           104:        [self setDiskType:PR_DRIVE_SCSI];
        !           105:        [self setWriteProtected:0];
        !           106:        
        !           107:        /*
        !           108:         * Do a unix open  for each thread. All I/O here goes thru the live 
        !           109:         * partition.
        !           110:         */
        !           111:        sprintf(unix_name, "/dev/rsd%dh", diskNum);
        !           112:        for(thread_num=0; thread_num<NUM_SCSI_THREADS; thread_num++) {
        !           113:                unix_fd[thread_num] = open(unix_name, O_RDWR, 0);
        !           114:                if(unix_fd[thread_num] < 0) {
        !           115:                
        !           116:                        /*
        !           117:                         * Maybe it's read-only.
        !           118:                         */
        !           119:                        unix_fd[thread_num] = open(unix_name, O_RDONLY, 0);
        !           120:                        if(unix_fd[thread_num] < 0) {
        !           121:                                perror("SCSIDisk open()");
        !           122:                                return(nil);
        !           123:                        }
        !           124:                        [self setWriteProtected:1];
        !           125:                }
        !           126:        }
        !           127:        
        !           128:        /*
        !           129:         * Let superclass take care of initializing inherited instance
        !           130:         * variables.
        !           131:         */
        !           132:        [self unixInit:NUM_SCSI_THREADS];
        !           133:        if([self updatePhysicalParameters])
        !           134:                return nil;     
        !           135:        return self;
        !           136: }
        !           137: 
        !           138: /*
        !           139:  * Get physical parameters (dev_size, block_size, etc.) from new disk.
        !           140:  */
        !           141: - (IOReturn)updatePhysicalParameters
        !           142: {
        !           143: #if    i386
        !           144:        return(IO_R_IO);
        !           145: #else
        !           146:        int rtn;
        !           147:        int formattedFlag;
        !           148:        struct capacity_reply capacity;
        !           149:        
        !           150:        /*
        !           151:         * Is it formatted?
        !           152:         */
        !           153:        [self setRemovable:0];          // fixme 
        !           154:        rtn = ioctl(unix_fd[0], DKIOCGFORMAT, &formattedFlag);
        !           155:        if(rtn) {
        !           156:                xpr_ud("SCSIDisk get format: errno %d\n", errno, 2,3,4,5);
        !           157:                return(IO_R_IO);
        !           158:        }
        !           159:        if(formattedFlag) {
        !           160:                [self setFormattedInternal:1];
        !           161:                rtn = ioctl(unix_fd[0], SDIOCGETCAP, &capacity);
        !           162:                if(rtn) {
        !           163:                        xpr_ud("SCSIDisk get capacity: errno %d\n", errno, 
        !           164:                                2,3,4,5);
        !           165:                        return(IO_R_IO);
        !           166:                }
        !           167:                [self setBlockSize:capacity.cr_blklen];
        !           168:                [self setDiskSize:capacity.cr_lastlba + 1];
        !           169:        }
        !           170:        else {
        !           171:                [self setBlockSize:-1];
        !           172:                [self setDiskSize:0];   
        !           173:                [self setFormatted:0];
        !           174:        }
        !           175:        
        !           176:        /*
        !           177:         * FIXME - get writeProtected via Inquiry command...
        !           178:         */
        !           179:        return(IO_R_SUCCESS);
        !           180: #endif
        !           181: }
        !           182: 

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