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1.1 root 1: /*
2: * @(#)if_hyreg.h 7.1 (Berkeley) 6/5/86
3: *
4: * $Header: if_hyreg.h,v 10.0 84/06/30 19:51:34 steveg Stable $
5: * $Locker: $
6: *
7: * Modifications from Berkeley 4.2 BSD
8: * Copyright (c) 1983, Tektronix Inc.
9: * All Rights Reserved
10: *
11: */
12:
13:
14: /*
15: * Network Systems Corporation Hyperchannel interface
16: *
17: * supports A410 adapter interfaced via a DEC DR-11B, NSC PI-13 or PI-14
18: * (PI-14 is a PI-13 with different line drivers, software is
19: * identical to a PI-13)
20: *
21: * Written by Steve Glaser, Tektronix Inc., July 1982
22: *
23: * NOTE:
24: *
25: * DR11B code has not been fully checked out with 4.1a.
26: * The first adapters at Tek came with DR11Bs, and the code once worked,
27: * but those have been upgraded to PI-13s.
28: */
29:
30: /*
31: * The HYPERchannel driver sends and receives messages formatted:
32: *
33: * +---------------------------------------+ ---
34: * | | /|\
35: * | HYPERchannel adapter header (hy_hdr) | |
36: * | | |
37: * +---------------------------------------+ |
38: * | | |
39: * | Internet Protocol header (ip) | message proper
40: * | | (64 bytes max)
41: * +---------------------------------------+ |
42: * | | |
43: * | TCP header + user data | |
44: * | (if it all fits here) | |
45: * | | \|/
46: * +---------------------------------------+ ---
47: *
48: * +---------------------------------------+ ---
49: * | | /|\
50: * | | |
51: * | TCP header + user data | associated data
52: * | | |
53: * | | \|/
54: * +---------------------------------------+ ---
55: *
56: * If all of the datagram will fit in the message proper (including
57: * the TCP header and user data) the entire datagram is passed in
58: * the message proper and the associated data feature of the HYPERchannel
59: * is not used.
60: *
61: * The mapping from internet addresses to HYPERchannel addresses is:
62: *
63: * 0 7 8 15 16 31
64: * +---------+---------+-----------------------+
65: * | network | special | HYPERchannel address |
66: * +---------+---------+-----------------------+
67: *
68: * |<------------ internet address ----------->|
69: *
70: * The hyperchannel address is decoded as follows:
71: *
72: * 0 7 8 13 14 15
73: * +-------------------+----------------+------+
74: * | adapter number | zero | port |
75: * +-------------------+----------------+------+
76: *
77: * The low 2 bits are port number (interpreted by hyperchannel hardware).
78: *
79: * The encoding of special bits is:
80: *
81: * 00 normal packet
82: *
83: * 01 loop this packet back to the sender at the
84: * specified adapter (ip header source/destination addresses
85: * swapped before sending, command bits added to tell the
86: * remote HYPERchannel adapter debug & performance studies]
87: * this code acts like 02 (below) if the ip destination (before
88: * any swapping) and the destination address don't match (e.g.
89: * this packet is being routed through a gateway)
90: *
91: * 02 loop this packet back to the sender at the
92: * specified adapter, but go through the specified adapter's
93: * IP. This is for testing IP's store and forward mechanism.
94: *
95: * other undefined, currently treated as normal packet
96: *
97: */
98: #define MPSIZE 64 /* "Message Proper" size */
99: #define MAXRETRY 4
100:
101: /*
102: * Device registers
103: */
104: struct hydevice {
105: short hyd_wcr; /* word count (negated) */
106: u_short hyd_bar; /* bus address bits 15-0 */
107: u_short hyd_csr; /* control and status */
108: u_short hyd_dbuf; /* data buffer */
109: };
110:
111: /*
112: * CSR bit layout
113: */
114: #define S_ERROR 0100000 /* error */
115: #define S_NEX 0040000 /* non-existent memory error */
116: #define S_ATTN 0020000 /* attn (always zero) */
117: #ifdef PI13
118: #define S_STKINTR 0010000 /* stacked interrupt */
119: #else
120: #define S_MAINT 0010000 /* maintenance (not used) */
121: #endif
122: #define S_A 0004000 /* device status A (recieve data available) */
123: #define S_B 0002000 /* device status B (normal termination) */
124: #define S_C 0001000 /* device status C (abnormal termination) */
125: #ifdef PI13
126: #define S_POWEROFF 0000400 /* power off indicator */
127: #else
128: #define S_CYCLE 0000400 /* cycle (not used) */
129: #endif
130: #define S_READY 0000200 /* ready */
131: #define S_IE 0000100 /* interrupt enable */
132: #define S_XBA 0000060 /* bus address bit bits 17 and 16 */
133: #define S_CLRINT 0000014 /* clear stacked interrupt */
134: #define S_IATTN 0000010 /* interrupt on attention only */
135: #define S_WC 0000004 /* interrupt on word count == 0 only */
136: #define S_IATTNWC 0000000 /* interrupt on word count == 0 and attention */
137: #define S_BURST 0000002 /* burst mode DMA (not used) */
138: #define S_GO 0000001 /* go */
139:
140: #define XBASHIFT 12
141:
142: #define HY_CSR_BITS "\20\
143: \20ERROR\17NEX\16ATTN\15STKINTR\14RECV_DATA\13NORMAL\12ABNORMAL\11POWER\
144: \10READY\07IENABLE\06XBA17\05XBA16\04IATTN\03IWC\02BURST\01GO"
145:
146: /*
147: * PI13 status conditions
148: */
149: #define HYS_RECVDATA(x) (((x)->hyd_csr & S_A) != 0) /* get adapter data */
150: #define HYS_NORMAL(x) (((x)->hyd_csr & S_B) != 0) /* done normally */
151: #define HYS_ABNORMAL(x) (((x)->hyd_csr & S_C) != 0) /* done abnormally */
152: #define HYS_ERROR(x) (((x)->hyd_csr & S_ERROR) != 0) /* error condition */
153: #define HYS_DONE(x) (((x)->hyd_csr & (S_ERROR|S_B|S_C)) != 0)
154:
155: /*
156: * Function Codes for the Hyperchannel Adapter
157: * The codes are offset so they can be "or"ed into
158: * the reg data buffer
159: */
160: #define HYF_XMITMSG 0x04 /* transmit message */
161: #define HYF_XMITDATA 0x08 /* transmit associated data */
162: #define HYF_XMITLSTDATA 0x0C /* transmit last associated data */
163: #define HYF_XMITLOCMSG 0x10 /* transmit local message */
164: #define HYF_INPUTMSG 0x24 /* input message proper */
165: #define HYF_INPUTDATA 0x28 /* input assiciated data */
166: #define HYF_STATUS 0x40 /* request status */
167: #define HYF_DUMPREGS 0x50 /* dump extention registers */
168: #define HYF_MARKP0 0x60 /* mark down port 0 */
169: #define HYF_MARKP1 0x64 /* mark down port 1 */
170: #define HYF_MARKP2 0x68 /* mark down port 2 */
171: #define HYF_MARKP3 0x6C /* mark down port 3 */
172: #define HYF_MP0RR 0x70 /* mark down port 0 and reroute messages */
173: #define HYF_MP1RR 0x74 /* mark down port 1 and reroute messages */
174: #define HYF_MP2RR 0x78 /* mark down port 2 and reroute messages */
175: #define HYF_MP3RR 0x7C /* mark down port 3 and reroute messages */
176: #define HYF_RSTATS 0xA0 /* read statistics */
177: #define HYF_RCSTATS 0xA4 /* read and clear statistics */
178: #define HYF_SETTEST 0xC0 /* enable test operations *set test mode) */
179: #define HYF_SADDR_LEN 0xC4 /* test mode: set address and length */
180: #define HYF_WBUFF 0xC8 /* test mode: write buffer */
181: #define HYF_RBUFF 0xCC /* test mode: read buffer */
182: #define HYF_CLRADAPTER 0xE0 /* clear adapter */
183: #define HYF_END_OP 0xE4 /* end operation */
184: #define HYF_CLRWFMSG 0xE6 /* clear wait for mwssage */
185: #define HYF_WAITFORMSG 0xE8 /* wait for message */
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