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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 1.0 (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: /*
25: * Copyright 1997-1998 by Apple Computer, Inc., All rights reserved.
26: * Copyright 1994-1997 NeXT Software, Inc., All rights reserved.
27: *
28: * AtapiCnt.h - Interface for ATAPI controller class.
29: *
30: * HISTORY
31: * 31-Aug-1994 Rakesh Dubey at NeXT
32: * Created.
33: */
34:
35: #ifndef _ATAPI_CNT_H
36: #define _ATAPI_CNT_H 1
37:
38: #import <driverkit/scsiTypes.h>
39: #import <driverkit/IOSCSIController.h>
40: #import "AtapiCntCmds.h"
41:
42: /*
43: * We will preallocate command buffers for doing I/O. This avoids a deadlock
44: * situation when we are running very low on memory. Comment out this #define
45: * if this behavior is not desired.
46: */
47: #define NO_ATAPI_RUNTIME_MEMORY_ALLOCATION
48:
49: /*
50: * Commands to be executed by I/O thread.
51: */
52: typedef enum {
53: ATAPI_CNT_IOREQ, /* process IdeIoReq_t */
54: ATAPI_CNT_ABORT, /* abort pending "needsDisk" I/Os */
55: ATAPI_CNT_THREAD_ABORT, /* thread abort */
56: } atapiCmd_t;
57:
58: /*
59: * Command buffer. These are enqueued on one of the I/O queues by exported
60: * methods and dequeued and processed by the I/O thread.
61: */
62: typedef struct {
63: atapiCmd_t command; /* IOREQ or abort */
64: atapiIoReq_t *atapiIoReq; /* command block passed to controller */
65: void *buffer;
66: vm_task_t client;
67: id waitLock; /* NXConditionLock */
68: sc_status_t status;
69: queue_chain_t link;
70: queue_chain_t bufLink;
71: } atapiBuf_t;
72:
73: /*
74: * Mode sense/select - Mode Parameter Header.
75: */
76: typedef struct {
77: unsigned char mdl1; // mode data length MSB
78: unsigned char mdl0; // mode data length LSB
79: unsigned char mt; // medium type
80: unsigned char rsvd0;
81: unsigned char rsvd1;
82: unsigned char rsvd2;
83: unsigned char rsvd3;
84: unsigned char rsvd4;
85: } atapiMPH_t;
86:
87: /*
88: * Mode sense/select - Mode Parameter List.
89: */
90: typedef struct {
91: atapiMPH_t mph;
92: unsigned char pageData[MODSEL_DATA_LEN * 2];
93: } atapiMPL_t;
94:
95: @interface AtapiController:IOSCSIController
96: {
97: @private
98: /*
99: * The queues on which all I/Os are enqueued by exported methods.
100: */
101: queue_head_t _ioQueueNodisk; /* for all I/O */
102:
103: #ifdef NO_ATAPI_RUNTIME_MEMORY_ALLOCATION
104: queue_head_t _atapiBufQueue;
105: id _atapiBufLock;
106: #define MAX_NUM_ATAPIBUF 64
107: atapiBuf_t _atapiBufPool[MAX_NUM_ATAPIBUF];
108: #endif NO_ATAPI_RUNTIME_MEMORY_ALLOCATION
109:
110: /*
111: * NXConditionLock - protects the queues; I/O thread sleeps on this.
112: */
113: id _ioQLock;
114:
115: id _ataController; /* ATA controller */
116:
117: /*
118: * Mode sense/select Mode Parameter List. Used to translate
119: * from ATAPI format to SCSI or vice-versa.
120: */
121: atapiMPL_t modeData;
122: }
123:
124: + (BOOL)probe : deviceDescription;
125: + (IODeviceStyle)deviceStyle; /* override IOSCSIController */
126: + (Protocol **)requiredProtocols;
127:
128: - (sc_status_t) executeRequest : (IOSCSIRequest *)scsiReq
129: buffer : (void *)buffer
130: client : (vm_task_t)client;
131:
132: - (BOOL) maptoAtapiCmd:(atapiIoReq_t *)atapiIoReq /* map SCSI -> ATAPI */
133: buffer:(void *)buffer newBuffer:(atapiMPL_t *)mode;
134:
135: - (BOOL) maptoSCSICmd:(atapiIoReq_t *)atapiIoReq buffer:(void *)buffer
136: newBuffer:(atapiMPL_t *)mode;
137:
138: - (BOOL) emulateSCSICmd:(atapiIoReq_t *)atapiIoReq
139: buffer:(void *)buffer; /* fake these */
140:
141: - (sc_status_t)resetSCSIBus;
142:
143: @end
144:
145: /*
146: * So that we can use ATAPI naming convention and still use the ATA
147: * registers.
148: */
149: #define InterruptReason sectCnt
150: #define byteCountLow cylLow
151: #define byteCountHigh cylHigh
152: #define driveSelect drHead
153:
154: #define ATAPI_NLUNS 1
155:
156: #endif /* _ATAPI_CNT_H */
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