1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
|
/*-
* Copyright (c) 1992, 1993, University of Vermont and State
* Agricultural College.
* Copyright (c) 1992, 1993, Garrett A. Wollman.
*
* Portions:
* Copyright (c) 1990, 1991, William F. Jolitz
* Copyright (c) 1990, The Regents of the University of California
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* Vermont and State Agricultural College and Garrett A. Wollman,
* by William F. Jolitz, by the University of California,
* Berkeley, by Larwence Berkeley Laboratory, and its contributors.
* 4. Neither the names of the Universities nor the names of the authors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR AUTHORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: if_ie.c,v 1.9 1994/08/13 03:50:05 wollman Exp $
*/
/*
* Intel 82586 Ethernet chip
* Register, bit, and structure definitions.
*
* Written by GAW with reference to the Clarkson Packet Driver code for this
* chip written by Russ Nelson and others.
*
* BPF support code stolen directly from hpdev/if_le.c, supplied with
* tcpdump.
*/
/*
* The i82586 is a very versatile chip, found in many implementations.
* Programming this chip is mostly the same, but certain details differ
* from card to card. This driver is written so that different cards
* can be automatically detected at run-time. Currently, only the
* AT&T EN100/StarLAN 10 series are supported.
*/
/*
Mode of operation:
We run the 82586 in a standard Ethernet mode. We keep NFRAMES received
frame descriptors around for the receiver to use, and NBUFFS associated
receive buffer descriptors, both in a circular list. Whenever a frame is
received, we rotate both lists as necessary. (The 586 treats both lists
as a simple queue.) We also keep a transmit command around so that packets
can be sent off quickly.
We configure the adapter in AL-LOC = 1 mode, which means that the
Ethernet/802.3 MAC header is placed at the beginning of the receive buffer
rather than being split off into various fields in the RFD. This also
means that we must include this header in the transmit buffer as well.
By convention, all transmit commands, and only transmit commands, shall
have the I (IE_CMD_INTR) bit set in the command. This way, when an
interrupt arrives at ieintr(), it is immediately possible to tell
what precisely caused it. ANY OTHER command-sending routines should
run at splimp(), and should post an acknowledgement to every interrupt
they generate.
The 82586 has a 24-bit address space internally, and the adaptor's
memory is located at the top of this region. However, the value we are
given in configuration is normally the *bottom* of the adaptor RAM. So,
we must go through a few gyrations to come up with a kernel virtual address
which represents the actual beginning of the 586 address space. First,
we autosize the RAM by running through several possible sizes and trying
to initialize the adapter under the assumption that the selected size
is correct. Then, knowing the correct RAM size, we set up our pointers
in ie_softc[unit]. `iomem' represents the computed base of the 586
address space. `iomembot' represents the actual configured base
of adapter RAM. Finally, `iosize' represents the calculated size
of 586 RAM. Then, when laying out commands, we use the interval
[iomembot, iomembot + iosize); to make 24-pointers, we subtract
iomem, and to make 16-pointers, we subtract iomem and and with 0xffff.
*/
#include "ie.h"
#if NIE > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <net/route.h>
#include "bpfilter.h"
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/ic/i82586.h>
#include <i386/isa/if_iereg.h>
#include <i386/isa/icu.h>
#include <i386/isa/if_ie507.h>
#include <i386/isa/elink.h>
#include <vm/vm.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#if (NBPFILTER > 0) || defined(MULTICAST)
#define FILTER
static struct mbuf *last_not_for_us;
#endif
#ifdef DEBUG
#define IED_RINT 1
#define IED_TINT 2
#define IED_RNR 4
#define IED_CNA 8
#define IED_READFRAME 16
int ie_debug = IED_RNR;
#endif
#ifndef ETHERMINLEN
#define ETHERMINLEN 60
#endif
#define IE_BUF_LEN 1512 /* length of transmit buffer */
/* Forward declaration */
struct ie_softc;
static int ieprobe(struct isa_device *dvp);
static int ieattach(struct isa_device *dvp);
static void ieinit(int unit);
static int ieioctl(struct ifnet *ifp, int command, caddr_t data);
static void iestart(struct ifnet *ifp);
static void el_reset_586(int unit);
static void el_chan_attn(int unit);
static void sl_reset_586(int unit);
static void sl_chan_attn(int unit);
static void iereset(int unit);
static void ie_readframe(int unit, struct ie_softc *ie, int bufno);
static void ie_drop_packet_buffer(int unit, struct ie_softc *ie);
static void sl_read_ether(int unit, unsigned char addr[6]);
static void find_ie_mem_size(int unit);
static int command_and_wait(int unit, int command, void volatile *pcmd, int);
static int ierint(int unit, struct ie_softc *ie);
static int ietint(int unit, struct ie_softc *ie);
static int iernr(int unit, struct ie_softc *ie);
static void start_receiver(int unit);
static int ieget(int, struct ie_softc *, struct mbuf **,
struct ether_header *, int *);
static caddr_t setup_rfa(caddr_t ptr, struct ie_softc *ie);
static int mc_setup(int, caddr_t, volatile struct ie_sys_ctl_block *);
#ifdef MULTICAST
static void ie_mc_reset(int unit);
#endif
#ifdef DEBUG
void print_rbd(volatile struct ie_recv_buf_desc *rbd);
int in_ierint = 0;
int in_ietint = 0;
#endif
/*
* This tells the autoconf code how to set us up.
*/
struct isa_driver iedriver = {
ieprobe, ieattach, "ie",
};
enum ie_hardware {
IE_STARLAN10,
IE_EN100,
IE_SLFIBER,
IE_3C507,
IE_UNKNOWN
};
const char *ie_hardware_names[] = {
"StarLAN 10",
"EN100",
"StarLAN Fiber",
"3C507",
"Unknown"
};
/*
sizeof(iscp) == 1+1+2+4 == 8
sizeof(scb) == 2+2+2+2+2+2+2+2 == 16
NFRAMES * sizeof(rfd) == NFRAMES*(2+2+2+2+6+6+2+2) == NFRAMES*24 == 384
sizeof(xmit_cmd) == 2+2+2+2+6+2 == 18
sizeof(transmit buffer) == 1512
sizeof(transmit buffer desc) == 8
-----
1946
NBUFFS * sizeof(rbd) == NBUFFS*(2+2+4+2+2) == NBUFFS*12
NBUFFS * IE_RBUF_SIZE == NBUFFS*256
NBUFFS should be (16384 - 1946) / (256 + 12) == 14438 / 268 == 53
With NBUFFS == 48, this leaves us 1574 bytes for another command or
more buffers. Another transmit command would be 18+8+1512 == 1538
---just barely fits!
Obviously all these would have to be reduced for smaller memory sizes.
With a larger memory, it would be possible to roughly double the number of
both transmit and receive buffers.
*/
#define NFRAMES 16 /* number of frames to allow for receive */
#define NBUFFS 48 /* number of buffers to allocate */
#define IE_RBUF_SIZE 256 /* size of each buffer, MUST BE POWER OF TWO */
/*
* Ethernet status, per interface.
*/
struct ie_softc {
struct arpcom arpcom;
void (*ie_reset_586)(int);
void (*ie_chan_attn)(int);
enum ie_hardware hard_type;
int hard_vers;
u_short port;
caddr_t iomem;
caddr_t iomembot;
unsigned iosize;
int want_mcsetup;
int promisc;
volatile struct ie_int_sys_conf_ptr *iscp;
volatile struct ie_sys_ctl_block *scb;
volatile struct ie_recv_frame_desc *rframes[NFRAMES];
volatile struct ie_recv_buf_desc *rbuffs[NBUFFS];
volatile char *cbuffs[NBUFFS];
int rfhead, rftail, rbhead, rbtail;
volatile struct ie_xmit_cmd *xmit_cmds[2];
volatile struct ie_xmit_buf *xmit_buffs[2];
int xmit_count;
u_char *xmit_cbuffs[2];
struct ie_en_addr mcast_addrs[MAXMCAST + 1];
int mcast_count;
#if NBPFILTER > 0
caddr_t ie_bpf;
#endif
} ie_softc[NIE];
#define MK_24(base, ptr) ((caddr_t)((u_long)ptr - (u_long)base))
#define MK_16(base, ptr) ((u_short)(u_long)MK_24(base, ptr))
#define PORT ie_softc[unit].port
#define MEM ie_softc[unit].iomem
static int sl_probe(struct isa_device *);
static int el_probe(struct isa_device *);
int ieprobe(dvp)
struct isa_device *dvp;
{
int ret;
ret = sl_probe(dvp);
if(!ret) ret = el_probe(dvp);
return(ret);
}
static int sl_probe(dvp)
struct isa_device *dvp;
{
int unit = dvp->id_unit;
u_char c;
ie_softc[unit].port = dvp->id_iobase;
ie_softc[unit].iomembot = dvp->id_maddr;
ie_softc[unit].iomem = 0;
c = inb(PORT + IEATT_REVISION);
switch(SL_BOARD(c)) {
case SL10_BOARD:
ie_softc[unit].hard_type = IE_STARLAN10;
ie_softc[unit].ie_reset_586 = sl_reset_586;
ie_softc[unit].ie_chan_attn = sl_chan_attn;
break;
case EN100_BOARD:
ie_softc[unit].hard_type = IE_EN100;
ie_softc[unit].ie_reset_586 = sl_reset_586;
ie_softc[unit].ie_chan_attn = sl_chan_attn;
break;
case SLFIBER_BOARD:
ie_softc[unit].hard_type = IE_SLFIBER;
ie_softc[unit].ie_reset_586 = sl_reset_586;
ie_softc[unit].ie_chan_attn = sl_chan_attn;
break;
/*
* Anything else is not recognized or cannot be used.
*/
default:
return 0;
}
ie_softc[unit].hard_vers = SL_REV(c);
/*
* Divine memory size on-board the card. Ususally 16k.
*/
find_ie_mem_size(unit);
if(!ie_softc[unit].iosize) {
return 0;
}
dvp->id_msize = ie_softc[unit].iosize;
switch(ie_softc[unit].hard_type) {
case IE_EN100:
case IE_STARLAN10:
case IE_SLFIBER:
sl_read_ether(unit, ie_softc[unit].arpcom.ac_enaddr);
break;
default:
printf("ie%d: unknown AT&T board type code %d\n", unit,
ie_softc[unit].hard_type);
return 0;
}
return 1;
}
static int el_probe(dvp)
struct isa_device *dvp;
{
struct ie_softc *sc = &ie_softc[dvp->id_unit];
u_char c;
int i;
u_char signature[] = "*3COM*";
int unit = dvp->id_unit;
sc->port = dvp->id_iobase;
sc->iomembot = dvp->id_maddr;
/* Need this for part of the probe. */
sc->ie_reset_586 = el_reset_586;
sc->ie_chan_attn = el_chan_attn;
/* Reset and put card in CONFIG state without changing address. */
elink_reset();
outb(ELINK_ID_PORT, 0x00);
elink_idseq(ELINK_507_POLY);
elink_idseq(ELINK_507_POLY);
outb(ELINK_ID_PORT, 0xff);
c = inb(PORT + IE507_MADDR);
if(c & 0x20) {
printf("ie%d: can't map 3C507 RAM in high memory\n", unit);
return 0;
}
/* go to RUN state */
outb(ELINK_ID_PORT, 0x00);
elink_idseq(ELINK_507_POLY);
outb(ELINK_ID_PORT, 0x00);
outb(PORT + IE507_CTRL, EL_CTRL_NRST);
for (i = 0; i < 6; i++)
if (inb(PORT + i) != signature[i])
return 0;
c = inb(PORT + IE507_IRQ) & 0x0f;
if (dvp->id_irq != (1 << c)) {
printf("ie%d: kernel configured irq %d doesn't match board configured irq %d\n",
unit, ffs(dvp->id_irq) - 1, c);
return 0;
}
c = (inb(PORT + IE507_MADDR) & 0x1c) + 0xc0;
if (kvtop(dvp->id_maddr) != ((int)c << 12)) {
printf("ie%d: kernel configured maddr %x doesn't match board configured maddr %x\n",
unit, kvtop(dvp->id_maddr),(int)c << 12);
return 0;
}
outb(PORT + IE507_CTRL, EL_CTRL_NORMAL);
sc->hard_type = IE_3C507;
sc->hard_vers = 0; /* 3C507 has no version number. */
/*
* Divine memory size on-board the card.
*/
find_ie_mem_size(dvp->id_unit);
if (!sc->iosize) {
printf("ie%d: can't find shared memory\n", unit);
outb(PORT + IE507_CTRL, EL_CTRL_NRST);
return 0;
}
if(!dvp->id_msize)
dvp->id_msize = sc->iosize;
else if (dvp->id_msize != sc->iosize) {
printf("ie%d: kernel configured msize %d doesn't match board configured msize %d\n",
unit, dvp->id_msize, sc->iosize);
outb(PORT + IE507_CTRL, EL_CTRL_NRST);
return 0;
}
sl_read_ether(unit, ie_softc[unit].arpcom.ac_enaddr);
/* Clear the interrupt latch just in case. */
outb(PORT + IE507_ICTRL, 1);
return 16;
}
/*
* Taken almost exactly from Bill's if_is.c, then modified beyond recognition.
*/
int
ieattach(dvp)
struct isa_device *dvp;
{
int unit = dvp->id_unit;
struct ie_softc *ie = &ie_softc[unit];
struct ifnet *ifp = &ie->arpcom.ac_if;
ifp->if_unit = unit;
ifp->if_name = iedriver.name;
ifp->if_mtu = ETHERMTU;
printf("<%s R%d> ethernet address %s\n",
ie_hardware_names[ie_softc[unit].hard_type],
ie_softc[unit].hard_vers + 1,
ether_sprintf(ie->arpcom.ac_enaddr));
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS;
#ifdef MULTICAST
ifp->if_flags |= IFF_MULTICAST;
#endif /* MULTICAST */
ifp->if_init = ieinit;
ifp->if_output = ether_output;
ifp->if_start = iestart;
ifp->if_ioctl = ieioctl;
ifp->if_reset = iereset;
ifp->if_type = IFT_ETHER;
ifp->if_addrlen = 6;
ifp->if_hdrlen = 14;
#if NBPFILTER > 0
bpfattach(&ie_softc[unit].ie_bpf, ifp, DLT_EN10MB,
sizeof(struct ether_header));
#endif
if_attach(ifp);
{
struct ifaddr *ifa = ifp->if_addrlist;
struct sockaddr_dl *sdl;
while(ifa && ifa->ifa_addr && ifa->ifa_addr->sa_family != AF_LINK)
ifa = ifa->ifa_next;
if(!ifa || !ifa->ifa_addr) return 1;
/* Provide our ether address to the higher layers */
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = 6;
sdl->sdl_slen = 0;
bcopy(ie->arpcom.ac_enaddr, LLADDR(sdl), 6);
return 1;
}
}
/*
* What to do upon receipt of an interrupt.
*/
int ieintr(unit)
int unit;
{
register struct ie_softc *ie = &ie_softc[unit];
register u_short status;
status = ie->scb->ie_status;
if ((status & IE_ST_WHENCE) == 0) {
/* Clear the interrupt latch on the 3C507. */
if (ie->hard_type == IE_3C507 &&
(inb(PORT + IE507_CTRL) & EL_CTRL_INTL))
outb(PORT + IE507_ICTRL, 1);
}
loop:
if(status & (IE_ST_RECV | IE_ST_RNR)) {
#ifdef DEBUG
in_ierint++;
if(ie_debug & IED_RINT)
printf("ie%d: rint\n", unit);
#endif
ierint(unit, ie);
#ifdef DEBUG
in_ierint--;
#endif
}
if(status & IE_ST_DONE) {
#ifdef DEBUG
in_ietint++;
if(ie_debug & IED_TINT)
printf("ie%d: tint\n", unit);
#endif
ietint(unit, ie);
#ifdef DEBUG
in_ietint--;
#endif
}
if(status & IE_ST_RNR) {
#ifdef DEBUG
if(ie_debug & IED_RNR)
printf("ie%d: rnr\n", unit);
#endif
iernr(unit, ie);
}
#ifdef DEBUG
if((status & IE_ST_ALLDONE)
&& (ie_debug & IED_CNA))
printf("ie%d: cna\n", unit);
#endif
/* Don't ack interrupts which we didn't receive */
ie_ack(ie->scb, IE_ST_WHENCE & status, unit, ie->ie_chan_attn);
if((status = ie->scb->ie_status) & IE_ST_WHENCE)
goto loop;
/* Clear the interrupt latch on the 3C507. */
if (ie->hard_type == IE_3C507)
outb(PORT + IE507_ICTRL, 1);
return unit;
}
/*
* Process a received-frame interrupt.
*/
static int ierint(unit, ie)
int unit;
struct ie_softc *ie;
{
int i, status;
static int timesthru = 1024;
i = ie->rfhead;
while(1) {
status = ie->rframes[i]->ie_fd_status;
if((status & IE_FD_COMPLETE) && (status & IE_FD_OK)) {
ie->arpcom.ac_if.if_ipackets++;
if(!--timesthru) {
ie->arpcom.ac_if.if_ierrors += ie->scb->ie_err_crc + ie->scb->ie_err_align +
ie->scb->ie_err_resource + ie->scb->ie_err_overrun;
ie->scb->ie_err_crc = 0;
ie->scb->ie_err_align = 0;
ie->scb->ie_err_resource = 0;
ie->scb->ie_err_overrun = 0;
timesthru = 1024;
}
ie_readframe(unit, ie, i);
} else {
if(status & IE_FD_RNR) {
if(!(ie->scb->ie_status & IE_RU_READY)) {
ie->rframes[0]->ie_fd_next = MK_16(MEM, ie->rbuffs[0]);
ie->scb->ie_recv_list = MK_16(MEM, ie->rframes[0]);
command_and_wait(unit, IE_RU_START, 0, 0);
}
}
break;
}
i = (i + 1) % NFRAMES;
}
return 0;
}
/*
* Process a command-complete interrupt. These are only generated by
* the transmission of frames. This routine is deceptively simple, since
* most of the real work is done by iestart().
*/
static int ietint(unit, ie)
int unit;
struct ie_softc *ie;
{
int status;
int i;
ie->arpcom.ac_if.if_timer = 0;
ie->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
for(i = 0; i < ie->xmit_count; i++) {
status = ie->xmit_cmds[i]->ie_xmit_status;
if(status & IE_XS_LATECOLL) {
printf("ie%d: late collision\n", unit);
ie->arpcom.ac_if.if_collisions++;
ie->arpcom.ac_if.if_oerrors++;
} else if(status & IE_XS_NOCARRIER) {
printf("ie%d: no carrier\n", unit);
ie->arpcom.ac_if.if_oerrors++;
} else if(status & IE_XS_LOSTCTS) {
printf("ie%d: lost CTS\n", unit);
ie->arpcom.ac_if.if_oerrors++;
} else if(status & IE_XS_UNDERRUN) {
printf("ie%d: DMA underrun\n", unit);
ie->arpcom.ac_if.if_oerrors++;
} else if(status & IE_XS_EXCMAX) {
printf("ie%d: too many collisions\n", unit);
ie->arpcom.ac_if.if_collisions += 16;
ie->arpcom.ac_if.if_oerrors++;
} else {
ie->arpcom.ac_if.if_opackets++;
ie->arpcom.ac_if.if_collisions += status & IE_XS_MAXCOLL;
}
}
ie->xmit_count = 0;
/*
* If multicast addresses were added or deleted while we were transmitting,
* ie_mc_reset() set the want_mcsetup flag indicating that we should do it.
*/
if(ie->want_mcsetup) {
mc_setup(unit, (caddr_t)ie->xmit_cbuffs[0], ie->scb);
ie->want_mcsetup = 0;
}
/* Wish I knew why this seems to be necessary... */
ie->xmit_cmds[0]->ie_xmit_status |= IE_STAT_COMPL;
iestart(&ie->arpcom.ac_if);
return 0; /* shouldn't be necessary */
}
/*
* Process a receiver-not-ready interrupt. I believe that we get these
* when there aren't enough buffers to go around. For now (FIXME), we
* just restart the receiver, and hope everything's ok.
*/
static int iernr(unit, ie)
int unit;
struct ie_softc *ie;
{
#ifdef doesnt_work
setup_rfa((caddr_t)ie->rframes[0], ie);
ie->scb->ie_recv_list = MK_16(MEM, ie_softc[unit].rframes[0]);
command_and_wait(unit, IE_RU_START, 0, 0);
#else
/* This doesn't work either, but it doesn't hang either. */
command_and_wait(unit, IE_RU_DISABLE, 0, 0); /* just in case */
setup_rfa((caddr_t)ie->rframes[0], ie); /* ignore cast-qual */
ie->scb->ie_recv_list = MK_16(MEM, ie_softc[unit].rframes[0]);
command_and_wait(unit, IE_RU_START, 0, 0); /* was ENABLE */
#endif
ie_ack(ie->scb, IE_ST_WHENCE, unit, ie->ie_chan_attn);
ie->arpcom.ac_if.if_ierrors++;
return 0;
}
#ifdef FILTER
/*
* Compare two Ether/802 addresses for equality, inlined and
* unrolled for speed. I'd love to have an inline assembler
* version of this...
*/
static inline int ether_equal(u_char *one, u_char *two) {
if(one[0] != two[0]) return 0;
if(one[1] != two[1]) return 0;
if(one[2] != two[2]) return 0;
if(one[3] != two[3]) return 0;
if(one[4] != two[4]) return 0;
if(one[5] != two[5]) return 0;
return 1;
}
/*
* Check for a valid address. to_bpf is filled in with one of the following:
* 0 -> BPF doesn't get this packet
* 1 -> BPF does get this packet
* 2 -> BPF does get this packet, but we don't
* Return value is true if the packet is for us, and false otherwise.
*
* This routine is a mess, but it's also critical that it be as fast
* as possible. It could be made cleaner if we can assume that the
* only client which will fiddle with IFF_PROMISC is BPF. This is
* probably a good assumption, but we do not make it here. (Yet.)
*/
static inline int check_eh(struct ie_softc *ie,
struct ether_header *eh,
int *to_bpf) {
int i;
switch(ie->promisc) {
case IFF_ALLMULTI:
/*
* Receiving all multicasts, but no unicasts except those destined for us.
*/
#if NBPFILTER > 0
*to_bpf = (ie->ie_bpf != 0); /* BPF gets this packet if anybody cares */
#endif
if(eh->ether_dhost[0] & 1) {
return 1;
}
if(ether_equal(eh->ether_dhost, ie->arpcom.ac_enaddr)) return 1;
return 0;
case IFF_PROMISC:
/*
* Receiving all packets. These need to be passed on to BPF.
*/
#if NBPFILTER > 0
*to_bpf = (ie->ie_bpf != 0);
#endif
/* If for us, accept and hand up to BPF */
if(ether_equal(eh->ether_dhost, ie->arpcom.ac_enaddr)) return 1;
#if NBPFILTER > 0
if(*to_bpf) *to_bpf = 2; /* we don't need to see it */
#endif
#ifdef MULTICAST
/*
* Not a multicast, so BPF wants to see it but we don't.
*/
if(!(eh->ether_dhost[0] & 1)) return 1;
/*
* If it's one of our multicast groups, accept it and pass it
* up.
*/
for(i = 0; i < ie->mcast_count; i++) {
if(ether_equal(eh->ether_dhost, (u_char *)&ie->mcast_addrs[i])) {
#if NBPFILTER > 0
if(*to_bpf) *to_bpf = 1;
#endif
return 1;
}
}
#endif /* MULTICAST */
return 1;
case IFF_ALLMULTI | IFF_PROMISC:
/*
* Acting as a multicast router, and BPF running at the same time.
* Whew! (Hope this is a fast machine...)
*/
#if NBPFILTER > 0
*to_bpf = (ie->ie_bpf != 0);
#endif
/* We want to see multicasts. */
if(eh->ether_dhost[0] & 1) return 1;
/* We want to see our own packets */
if(ether_equal(eh->ether_dhost, ie->arpcom.ac_enaddr)) return 1;
/* Anything else goes to BPF but nothing else. */
#if NBPFILTER > 0
if(*to_bpf) *to_bpf = 2;
#endif
return 1;
default:
/*
* Only accept unicast packets destined for us, or multicasts
* for groups that we belong to. For now, we assume that the
* '586 will only return packets that we asked it for. This
* isn't strictly true (it uses hashing for the multicast filter),
* but it will do in this case, and we want to get out of here
* as quickly as possible.
*/
#if NBPFILTER > 0
*to_bpf = (ie->ie_bpf != 0);
#endif
return 1;
}
return 0;
}
#endif /* FILTER */
/*
* We want to isolate the bits that have meaning... This assumes that
* IE_RBUF_SIZE is an even power of two. If somehow the act_len exceeds
* the size of the buffer, then we are screwed anyway.
*/
static inline int ie_buflen(struct ie_softc *ie, int head) {
return (ie->rbuffs[head]->ie_rbd_actual
& (IE_RBUF_SIZE | (IE_RBUF_SIZE - 1)));
}
static inline int ie_packet_len(int unit, struct ie_softc *ie) {
int i;
int head = ie->rbhead;
int acc = 0;
do {
if(!(ie->rbuffs[ie->rbhead]->ie_rbd_actual & IE_RBD_USED)) {
#ifdef DEBUG
print_rbd(ie->rbuffs[ie->rbhead]);
#endif
log(LOG_ERR, "ie%d: receive descriptors out of sync at %d\n",
unit, ie->rbhead);
iereset(unit);
return -1;
}
i = ie->rbuffs[head]->ie_rbd_actual & IE_RBD_LAST;
acc += ie_buflen(ie, head);
head = (head + 1) % NBUFFS;
} while(!i);
return acc;
}
/*
* Read data off the interface, and turn it into an mbuf chain.
*
* This code is DRAMATICALLY different from the previous version; this
* version tries to allocate the entire mbuf chain up front, given the
* length of the data available. This enables us to allocate mbuf
* clusters in many situations where before we would have had a long
* chain of partially-full mbufs. This should help to speed up the
* operation considerably. (Provided that it works, of course.)
*/
static inline int ieget(unit, ie, mp, ehp, to_bpf)
int unit;
struct ie_softc *ie;
struct mbuf **mp;
struct ether_header *ehp;
int *to_bpf;
{
struct mbuf *m, *top, **mymp;
int i;
int offset;
int totlen, resid;
int thismboff;
int head;
totlen = ie_packet_len(unit, ie);
if(totlen <= 0) return -1;
i = ie->rbhead;
/*
* Snarf the Ethernet header.
*/
bcopy((caddr_t)ie->cbuffs[i], (caddr_t)ehp, sizeof *ehp);
/* ignore cast-qual warning here */
/*
* As quickly as possible, check if this packet is for us.
* If not, don't waste a single cycle copying the rest of the
* packet in.
* This is only a consideration when FILTER is defined; i.e., when
* we are either running BPF or doing multicasting.
*/
#ifdef FILTER
if(!check_eh(ie, ehp, to_bpf)) {
ie_drop_packet_buffer(unit, ie);
ie->arpcom.ac_if.if_ierrors--; /* just this case, it's not an error */
return -1;
}
#endif
totlen -= (offset = sizeof *ehp);
MGETHDR(*mp, M_DONTWAIT, MT_DATA);
if(!*mp) {
ie_drop_packet_buffer(unit, ie);
return -1;
}
m = *mp;
m->m_pkthdr.rcvif = &ie->arpcom.ac_if;
m->m_len = MHLEN;
resid = m->m_pkthdr.len = totlen;
top = 0;
mymp = ⊤
/*
* This loop goes through and allocates mbufs for all the data we will
* be copying in. It does not actually do the copying yet.
*/
do { /* while(resid > 0) */
/*
* Try to allocate an mbuf to hold the data that we have. If we
* already allocated one, just get another one and stick it on the
* end (eventually). If we don't already have one, try to allocate
* an mbuf cluster big enough to hold the whole packet, if we think it's
* reasonable, or a single mbuf which may or may not be big enough.
* Got that?
*/
if(top) {
MGET(m, M_DONTWAIT, MT_DATA);
if(!m) {
m_freem(top);
ie_drop_packet_buffer(unit, ie);
return -1;
}
m->m_len = MLEN;
}
if(resid >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if(m->m_flags & M_EXT)
m->m_len = min(resid, MCLBYTES);
} else {
if(resid < m->m_len) {
if(!top && resid + max_linkhdr <= m->m_len)
m->m_data += max_linkhdr;
m->m_len = resid;
}
}
resid -= m->m_len;
*mymp = m;
mymp = &m->m_next;
} while(resid > 0);
resid = totlen;
m = top;
thismboff = 0;
head = ie->rbhead;
/*
* Now we take the mbuf chain (hopefully only one mbuf most of the
* time) and stuff the data into it. There are no possible failures
* at or after this point.
*/
while(resid > 0) { /* while there's stuff left */
int thislen = ie_buflen(ie, head) - offset;
/*
* If too much data for the current mbuf, then fill the current one
* up, go to the next one, and try again.
*/
if(thislen > m->m_len - thismboff) {
int newlen = m->m_len - thismboff;
bcopy((caddr_t)(ie->cbuffs[head] + offset),
mtod(m, caddr_t) + thismboff, (unsigned)newlen);
/* ignore cast-qual warning */
m = m->m_next;
thismboff = 0; /* new mbuf, so no offset */
offset += newlen; /* we are now this far into the packet */
resid -= newlen; /* so there is this much left to get */
continue;
}
/*
* If there is more than enough space in the mbuf to hold the
* contents of this buffer, copy everything in, advance pointers,
* and so on.
*/
if(thislen < m->m_len - thismboff) {
bcopy((caddr_t)(ie->cbuffs[head] + offset), /* ignore warning */
mtod(m, caddr_t) + thismboff, (unsigned)thislen);
thismboff += thislen; /* we are this far into the mbuf */
resid -= thislen; /* and this much is left */
goto nextbuf;
}
/*
* Otherwise, there is exactly enough space to put this buffer's
* contents into the current mbuf. Do the combination of the above
* actions.
*/
bcopy((caddr_t)(ie->cbuffs[head] + offset), /* ignore warning */
mtod(m, caddr_t) + thismboff, (unsigned)thislen);
m = m->m_next;
thismboff = 0; /* new mbuf, start at the beginning */
resid -= thislen; /* and we are this far through */
/*
* Advance all the pointers. We can get here from either of the
* last two cases, but never the first.
*/
nextbuf:
offset = 0;
ie->rbuffs[head]->ie_rbd_actual = 0;
ie->rbuffs[head]->ie_rbd_length |= IE_RBD_LAST;
ie->rbhead = head = (head + 1) % NBUFFS;
ie->rbuffs[ie->rbtail]->ie_rbd_length &= ~IE_RBD_LAST;
ie->rbtail = (ie->rbtail + 1) % NBUFFS;
}
/*
* Unless something changed strangely while we were doing the copy,
* we have now copied everything in from the shared memory.
* This means that we are done.
*/
return 0;
}
/*
* Read frame NUM from unit UNIT (pre-cached as IE).
*
* This routine reads the RFD at NUM, and copies in the buffers from
* the list of RBD, then rotates the RBD and RFD lists so that the receiver
* doesn't start complaining. Trailers are DROPPED---there's no point
* in wasting time on confusing code to deal with them. Hopefully,
* this machine will never ARP for trailers anyway.
*/
static void ie_readframe(unit, ie, num)
int unit;
struct ie_softc *ie;
int num; /* frame number to read */
{
struct ie_recv_frame_desc rfd;
struct mbuf *m = 0;
struct ether_header eh;
#if NBPFILTER > 0
int bpf_gets_it = 0;
#endif
bcopy((caddr_t)(ie->rframes[num]), &rfd, sizeof(struct ie_recv_frame_desc));
/* Immediately advance the RFD list, since we we have copied ours now. */
ie->rframes[num]->ie_fd_status = 0;
ie->rframes[num]->ie_fd_last |= IE_FD_LAST;
ie->rframes[ie->rftail]->ie_fd_last &= ~IE_FD_LAST;
ie->rftail = (ie->rftail + 1) % NFRAMES;
ie->rfhead = (ie->rfhead + 1) % NFRAMES;
if(rfd.ie_fd_status & IE_FD_OK) {
if(
#if NBPFILTER > 0
ieget(unit, ie, &m, &eh, &bpf_gets_it)
#else
ieget(unit, ie, &m, &eh, (int *)0)
#endif
) {
ie->arpcom.ac_if.if_ierrors++; /* this counts as an error */
return;
}
}
#ifdef DEBUG
if(ie_debug & IED_READFRAME) {
printf("ie%d: frame from ether %s type %x\n", unit,
ether_sprintf(eh.ether_shost), (unsigned)eh.ether_type);
}
if(ntohs(eh.ether_type) > ETHERTYPE_TRAIL
&& ntohs(eh.ether_type) < (ETHERTYPE_TRAIL + ETHERTYPE_NTRAILER))
printf("received trailer!\n");
#endif
if(!m) return;
#ifdef FILTER
if(last_not_for_us) {
m_freem(last_not_for_us);
last_not_for_us = 0;
}
#if NBPFILTER > 0
/*
* Check for a BPF filter; if so, hand it up.
* Note that we have to stick an extra mbuf up front, because
* bpf_mtap expects to have the ether header at the front.
* It doesn't matter that this results in an ill-formatted mbuf chain,
* since BPF just looks at the data. (It doesn't try to free the mbuf,
* tho' it will make a copy for tcpdump.)
*/
if(bpf_gets_it) {
struct mbuf m0;
m0.m_len = sizeof eh;
m0.m_data = (caddr_t)&eh;
m0.m_next = m;
/* Pass it up */
bpf_mtap(ie->ie_bpf, &m0);
}
/*
* A signal passed up from the filtering code indicating that the
* packet is intended for BPF but not for the protocol machinery.
* We can save a few cycles by not handing it off to them.
*/
if(bpf_gets_it == 2) {
last_not_for_us = m;
return;
}
#endif /* NBPFILTER > 0 */
/*
* In here there used to be code to check destination addresses upon
* receipt of a packet. We have deleted that code, and replaced it
* with code to check the address much earlier in the cycle, before
* copying the data in; this saves us valuable cycles when operating
* as a multicast router or when using BPF.
*/
#endif /* FILTER */
eh.ether_type = ntohs(eh.ether_type);
/*
* Finally pass this packet up to higher layers.
*/
ether_input(&ie->arpcom.ac_if, &eh, m);
}
static void ie_drop_packet_buffer(int unit, struct ie_softc *ie) {
int i;
do {
/*
* This means we are somehow out of sync. So, we reset the
* adapter.
*/
if(!(ie->rbuffs[ie->rbhead]->ie_rbd_actual & IE_RBD_USED)) {
#ifdef DEBUG
print_rbd(ie->rbuffs[ie->rbhead]);
#endif
log(LOG_ERR, "ie%d: receive descriptors out of sync at %d\n",
unit, ie->rbhead);
iereset(unit);
return;
}
i = ie->rbuffs[ie->rbhead]->ie_rbd_actual & IE_RBD_LAST;
ie->rbuffs[ie->rbhead]->ie_rbd_length |= IE_RBD_LAST;
ie->rbuffs[ie->rbhead]->ie_rbd_actual = 0;
ie->rbhead = (ie->rbhead + 1) % NBUFFS;
ie->rbuffs[ie->rbtail]->ie_rbd_length &= ~IE_RBD_LAST;
ie->rbtail = (ie->rbtail + 1) % NBUFFS;
} while(!i);
}
/*
* Start transmission on an interface.
*/
static void
iestart(ifp)
struct ifnet *ifp;
{
struct ie_softc *ie = &ie_softc[ifp->if_unit];
struct mbuf *m0, *m;
unsigned char *buffer;
u_short len;
/* This is not really volatile, in this routine, but it makes gcc happy. */
volatile u_short *bptr = &ie->scb->ie_command_list;
if(!(ifp->if_flags & IFF_RUNNING))
return;
if(ifp->if_flags & IFF_OACTIVE)
return;
do {
IF_DEQUEUE(&ie->arpcom.ac_if.if_snd, m);
if(!m)
break;
buffer = ie->xmit_cbuffs[ie->xmit_count];
len = 0;
for(m0 = m; m && len < IE_BUF_LEN; m = m->m_next) {
bcopy(mtod(m, caddr_t), buffer, m->m_len);
buffer += m->m_len;
len += m->m_len;
}
m_freem(m0);
len = max(len, ETHERMINLEN);
#if NBPFILTER > 0
/*
* See if bpf is listening on this interface, let it see the packet
* before we commit it to the wire.
*/
if(ie->ie_bpf)
bpf_tap(ie->ie_bpf, ie->xmit_cbuffs[ie->xmit_count], len);
#endif
ie->xmit_buffs[ie->xmit_count]->ie_xmit_flags = IE_XMIT_LAST | len;
ie->xmit_buffs[ie->xmit_count]->ie_xmit_next = 0xffff;
ie->xmit_buffs[ie->xmit_count]->ie_xmit_buf =
MK_24(ie->iomem, ie->xmit_cbuffs[ie->xmit_count]);
ie->xmit_cmds[ie->xmit_count]->com.ie_cmd_cmd = IE_CMD_XMIT;
ie->xmit_cmds[ie->xmit_count]->ie_xmit_status = 0;
ie->xmit_cmds[ie->xmit_count]->ie_xmit_desc =
MK_16(ie->iomem, ie->xmit_buffs[ie->xmit_count]);
*bptr = MK_16(ie->iomem, ie->xmit_cmds[ie->xmit_count]);
bptr = &ie->xmit_cmds[ie->xmit_count]->com.ie_cmd_link;
ie->xmit_count++;
} while(ie->xmit_count < 2);
/*
* If we queued up anything for transmission, send it.
*/
if(ie->xmit_count) {
ie->xmit_cmds[ie->xmit_count - 1]->com.ie_cmd_cmd |=
IE_CMD_LAST | IE_CMD_INTR;
/*
* By passing the command pointer as a null, we tell
* command_and_wait() to pretend that this isn't an action
* command. I wish I understood what was happening here.
*/
command_and_wait(ifp->if_unit, IE_CU_START, 0, 0);
ifp->if_flags |= IFF_OACTIVE;
}
return;
}
/*
* Check to see if there's an 82586 out there.
*/
int check_ie_present(unit, where, size)
int unit;
caddr_t where;
unsigned size;
{
volatile struct ie_sys_conf_ptr *scp;
volatile struct ie_int_sys_conf_ptr *iscp;
volatile struct ie_sys_ctl_block *scb;
u_long realbase;
int s;
s = splimp();
realbase = (u_long)where + size - (1 << 24);
scp = (volatile struct ie_sys_conf_ptr *)(realbase + IE_SCP_ADDR);
bzero((char *)scp, sizeof *scp); /* ignore cast-qual */
/*
* First we put the ISCP at the bottom of memory; this tests to make
* sure that our idea of the size of memory is the same as the controller's.
* This is NOT where the ISCP will be in normal operation.
*/
iscp = (volatile struct ie_int_sys_conf_ptr *)where;
bzero((char *)iscp, sizeof *iscp); /* ignore cast-qual */
scb = (volatile struct ie_sys_ctl_block *)where;
bzero((char *)scb, sizeof *scb); /* ignore cast-qual */
scp->ie_bus_use = 0; /* 16-bit */
scp->ie_iscp_ptr = (caddr_t)((volatile caddr_t)iscp - /* ignore cast-qual */
(volatile caddr_t)realbase);
iscp->ie_busy = 1;
iscp->ie_scb_offset = MK_16(realbase, scb) + 256;
(*ie_softc[unit].ie_reset_586)(unit);
(*ie_softc[unit].ie_chan_attn)(unit);
DELAY(100); /* wait a while... */
if(iscp->ie_busy) {
splx(s);
return 0;
}
/*
* Now relocate the ISCP to its real home, and reset the controller
* again.
*/
iscp = (void *)Align((caddr_t)(realbase + IE_SCP_ADDR -
sizeof(struct ie_int_sys_conf_ptr)));
bzero((char *)iscp, sizeof *iscp); /* ignore cast-qual */
scp->ie_iscp_ptr = (caddr_t)((caddr_t)iscp - (caddr_t)realbase);
/* ignore cast-qual */
iscp->ie_busy = 1;
iscp->ie_scb_offset = MK_16(realbase, scb);
(*ie_softc[unit].ie_reset_586)(unit);
(*ie_softc[unit].ie_chan_attn)(unit);
DELAY(100);
if(iscp->ie_busy) {
splx(s);
return 0;
}
ie_softc[unit].iosize = size;
ie_softc[unit].iomem = (caddr_t)realbase;
ie_softc[unit].iscp = iscp;
ie_softc[unit].scb = scb;
/*
* Acknowledge any interrupts we may have caused...
*/
ie_ack(scb, IE_ST_WHENCE, unit, ie_softc[unit].ie_chan_attn);
splx(s);
return 1;
}
/*
* Divine the memory size of ie board UNIT.
* Better hope there's nothing important hiding just below the ie card...
*/
static void find_ie_mem_size(unit)
int unit;
{
unsigned size;
ie_softc[unit].iosize = 0;
for(size = 65536; size >= 16384; size -= 16384) {
if(check_ie_present(unit, ie_softc[unit].iomembot, size)) {
return;
}
}
return;
}
void el_reset_586(unit)
int unit;
{
outb(PORT + IE507_CTRL, EL_CTRL_RESET);
DELAY(100);
outb(PORT + IE507_CTRL, EL_CTRL_NORMAL);
DELAY(100);
}
void sl_reset_586(unit)
int unit;
{
outb(PORT + IEATT_RESET, 0);
}
void el_chan_attn(unit)
int unit;
{
outb(PORT + IE507_ATTN, 1);
}
void sl_chan_attn(unit)
int unit;
{
outb(PORT + IEATT_ATTN, 0);
}
void sl_read_ether(unit, addr)
int unit;
unsigned char addr[6];
{
int i;
for(i = 0; i < 6; i++)
addr[i] = inb(PORT + i);
}
static void
iereset(unit)
int unit;
{
int s = splimp();
if(unit >= NIE) {
splx(s);
return;
}
printf("ie%d: reset\n", unit);
ie_softc[unit].arpcom.ac_if.if_flags &= ~IFF_UP;
ieioctl(&ie_softc[unit].arpcom.ac_if, SIOCSIFFLAGS, 0);
/*
* Stop i82586 dead in its tracks.
*/
if(command_and_wait(unit, IE_RU_ABORT | IE_CU_ABORT, 0, 0))
printf("ie%d: abort commands timed out\n", unit);
if(command_and_wait(unit, IE_RU_DISABLE | IE_CU_STOP, 0, 0))
printf("ie%d: disable commands timed out\n", unit);
#ifdef notdef
if(!check_ie_present(unit, ie_softc[unit].iomembot, ie_softc[unit].iosize))
panic("ie disappeared!\n");
#endif
ie_softc[unit].arpcom.ac_if.if_flags |= IFF_UP;
ieioctl(&ie_softc[unit].arpcom.ac_if, SIOCSIFFLAGS, 0);
splx(s);
return;
}
/*
* This is called if we time out.
*/
static void
chan_attn_timeout(rock)
caddr_t rock;
{
*(int *)rock = 1;
}
/*
* Send a command to the controller and wait for it to either
* complete or be accepted, depending on the command. If the
* command pointer is null, then pretend that the command is
* not an action command. If the command pointer is not null,
* and the command is an action command, wait for
* ((volatile struct ie_cmd_common *)pcmd)->ie_cmd_status & MASK
* to become true.
*/
static int command_and_wait(unit, cmd, pcmd, mask)
int unit;
int cmd;
volatile void *pcmd;
int mask;
{
volatile struct ie_cmd_common *cc = pcmd;
volatile int timedout = 0;
extern int hz;
ie_softc[unit].scb->ie_command = (u_short)cmd;
if(IE_ACTION_COMMAND(cmd) && pcmd) {
(*ie_softc[unit].ie_chan_attn)(unit);
/*
* According to the packet driver, the minimum timeout should be
* .369 seconds, which we round up to .37.
*/
timeout(chan_attn_timeout, (caddr_t)&timedout, 37 * hz / 100);
/* ignore cast-qual */
/*
* Now spin-lock waiting for status. This is not a very nice
* thing to do, but I haven't figured out how, or indeed if, we
* can put the process waiting for action to sleep. (We may
* be getting called through some other timeout running in the
* kernel.)
*/
while(1) {
if((cc->ie_cmd_status & mask) || timedout)
break;
}
untimeout(chan_attn_timeout, (caddr_t)&timedout);
/* ignore cast-qual */
return timedout;
} else {
/*
* Otherwise, just wait for the command to be accepted.
*/
(*ie_softc[unit].ie_chan_attn)(unit);
while(ie_softc[unit].scb->ie_command)
; /* spin lock */
return 0;
}
}
/*
* Run the time-domain reflectometer...
*/
static void run_tdr(unit, cmd)
int unit;
struct ie_tdr_cmd *cmd;
{
int result;
cmd->com.ie_cmd_status = 0;
cmd->com.ie_cmd_cmd = IE_CMD_TDR | IE_CMD_LAST;
cmd->com.ie_cmd_link = 0xffff;
cmd->ie_tdr_time = 0;
ie_softc[unit].scb->ie_command_list = MK_16(MEM, cmd);
cmd->ie_tdr_time = 0;
if(command_and_wait(unit, IE_CU_START, cmd, IE_STAT_COMPL))
result = 0x2000;
else
result = cmd->ie_tdr_time;
ie_ack(ie_softc[unit].scb, IE_ST_WHENCE, unit,
ie_softc[unit].ie_chan_attn);
if(result & IE_TDR_SUCCESS)
return;
if(result & IE_TDR_XCVR) {
printf("ie%d: transceiver problem\n", unit);
} else if(result & IE_TDR_OPEN) {
printf("ie%d: TDR detected an open %d clocks away\n", unit,
result & IE_TDR_TIME);
} else if(result & IE_TDR_SHORT) {
printf("ie%d: TDR detected a short %d clocks away\n", unit,
result & IE_TDR_TIME);
} else {
printf("ie%d: TDR returned unknown status %x\n", result);
}
}
static void start_receiver(unit)
int unit;
{
int s = splimp();
ie_softc[unit].scb->ie_recv_list = MK_16(MEM, ie_softc[unit].rframes[0]);
command_and_wait(unit, IE_RU_START, 0, 0);
ie_ack(ie_softc[unit].scb, IE_ST_WHENCE, unit, ie_softc[unit].ie_chan_attn);
splx(s);
}
/*
* Here is a helper routine for iernr() and ieinit(). This sets up
* the RFA.
*/
static caddr_t setup_rfa(caddr_t ptr, struct ie_softc *ie) {
volatile struct ie_recv_frame_desc *rfd = (void *)ptr;
volatile struct ie_recv_buf_desc *rbd;
int i;
int unit = ie - &ie_softc[0];
/* First lay them out */
for(i = 0; i < NFRAMES; i++) {
ie->rframes[i] = rfd;
bzero((char *)rfd, sizeof *rfd); /* ignore cast-qual */
rfd++;
}
ptr = (caddr_t)Align((caddr_t)rfd); /* ignore cast-qual */
/* Now link them together */
for(i = 0; i < NFRAMES; i++) {
ie->rframes[i]->ie_fd_next =
MK_16(MEM, ie->rframes[(i + 1) % NFRAMES]);
}
/* Finally, set the EOL bit on the last one. */
ie->rframes[NFRAMES - 1]->ie_fd_last |= IE_FD_LAST;
/*
* Now lay out some buffers for the incoming frames. Note that
* we set aside a bit of slop in each buffer, to make sure that
* we have enough space to hold a single frame in every buffer.
*/
rbd = (void *)ptr;
for(i = 0; i < NBUFFS; i++) {
ie->rbuffs[i] = rbd;
bzero((char *)rbd, sizeof *rbd); /* ignore cast-qual */
ptr = (caddr_t)Align(ptr + sizeof *rbd);
rbd->ie_rbd_length = IE_RBUF_SIZE;
rbd->ie_rbd_buffer = MK_24(MEM, ptr);
ie->cbuffs[i] = (void *)ptr;
ptr += IE_RBUF_SIZE;
rbd = (void *)ptr;
}
/* Now link them together */
for(i = 0; i < NBUFFS; i++) {
ie->rbuffs[i]->ie_rbd_next = MK_16(MEM, ie->rbuffs[(i + 1) % NBUFFS]);
}
/* Tag EOF on the last one */
ie->rbuffs[NBUFFS - 1]->ie_rbd_length |= IE_RBD_LAST;
/* We use the head and tail pointers on receive to keep track of
* the order in which RFDs and RBDs are used. */
ie->rfhead = 0;
ie->rftail = NFRAMES - 1;
ie->rbhead = 0;
ie->rbtail = NBUFFS - 1;
ie->scb->ie_recv_list = MK_16(MEM, ie->rframes[0]);
ie->rframes[0]->ie_fd_buf_desc = MK_16(MEM, ie->rbuffs[0]);
ptr = Align(ptr);
return ptr;
}
/*
* Run the multicast setup command.
* Call at splimp().
*/
static int mc_setup(int unit, caddr_t ptr,
volatile struct ie_sys_ctl_block *scb) {
struct ie_softc *ie = &ie_softc[unit];
volatile struct ie_mcast_cmd *cmd = (void *)ptr;
cmd->com.ie_cmd_status = 0;
cmd->com.ie_cmd_cmd = IE_CMD_MCAST | IE_CMD_LAST;
cmd->com.ie_cmd_link = 0xffff;
/* ignore cast-qual */
bcopy((caddr_t)ie->mcast_addrs, (caddr_t)cmd->ie_mcast_addrs,
ie->mcast_count * sizeof *ie->mcast_addrs);
cmd->ie_mcast_bytes = ie->mcast_count * 6; /* grrr... */
scb->ie_command_list = MK_16(MEM, cmd);
if(command_and_wait(unit, IE_CU_START, cmd, IE_STAT_COMPL)
|| !(cmd->com.ie_cmd_status & IE_STAT_OK)) {
printf("ie%d: multicast address setup command failed\n", unit);
return 0;
}
return 1;
}
/*
* This routine takes the environment generated by check_ie_present()
* and adds to it all the other structures we need to operate the adapter.
* This includes executing the CONFIGURE, IA-SETUP, and MC-SETUP commands,
* starting the receiver unit, and clearing interrupts.
*
* THIS ROUTINE MUST BE CALLED AT splimp() OR HIGHER.
*/
static void
ieinit(unit)
int unit;
{
struct ie_softc *ie = &ie_softc[unit];
volatile struct ie_sys_ctl_block *scb = ie->scb;
caddr_t ptr;
ptr = (caddr_t)Align((caddr_t)scb + sizeof *scb); /* ignore cast-qual */
/*
* Send the configure command first.
*/
{
volatile struct ie_config_cmd *cmd = (void *)ptr;
ie_setup_config(cmd, ie->promisc, ie->hard_type == IE_STARLAN10);
cmd->com.ie_cmd_status = 0;
cmd->com.ie_cmd_cmd = IE_CMD_CONFIG | IE_CMD_LAST;
cmd->com.ie_cmd_link = 0xffff;
scb->ie_command_list = MK_16(MEM, cmd);
if(command_and_wait(unit, IE_CU_START, cmd, IE_STAT_COMPL)
|| !(cmd->com.ie_cmd_status & IE_STAT_OK)) {
printf("ie%d: configure command failed\n", unit);
return;
}
}
/*
* Now send the Individual Address Setup command.
*/
{
volatile struct ie_iasetup_cmd *cmd = (void *)ptr;
cmd->com.ie_cmd_status = 0;
cmd->com.ie_cmd_cmd = IE_CMD_IASETUP | IE_CMD_LAST;
cmd->com.ie_cmd_link = 0xffff;
bcopy((char *)ie_softc[unit].arpcom.ac_enaddr, (char *)&cmd->ie_address,
sizeof cmd->ie_address); /* ignore cast-qual */
scb->ie_command_list = MK_16(MEM, cmd);
if(command_and_wait(unit, IE_CU_START, cmd, IE_STAT_COMPL)
|| !(cmd->com.ie_cmd_status & IE_STAT_OK)) {
printf("ie%d: individual address setup command failed\n", unit);
return;
}
}
/*
* Now run the time-domain reflectometer.
*/
run_tdr(unit, (void *)ptr);
/*
* Acknowledge any interrupts we have generated thus far.
*/
ie_ack(ie->scb, IE_ST_WHENCE, unit, ie->ie_chan_attn);
/*
* Set up the RFA.
*/
ptr = setup_rfa(ptr, ie);
/*
* Finally, the transmit command and buffer are the last little bit of work.
*/
ie->xmit_cmds[0] = (void *)ptr;
ptr += sizeof *ie->xmit_cmds[0];
ptr = Align(ptr);
ie->xmit_buffs[0] = (void *)ptr;
ptr += sizeof *ie->xmit_buffs[0];
ptr = Align(ptr);
/* Second transmit command */
ie->xmit_cmds[1] = (void *)ptr;
ptr += sizeof *ie->xmit_cmds[1];
ptr = Align(ptr);
ie->xmit_buffs[1] = (void *)ptr;
ptr += sizeof *ie->xmit_buffs[1];
ptr = Align(ptr);
/* Both transmit buffers */
ie->xmit_cbuffs[0] = (void *)ptr;
ptr += IE_BUF_LEN;
ptr = Align(ptr);
ie->xmit_cbuffs[1] = (void *)ptr;
bzero((caddr_t)ie->xmit_cmds[0], sizeof *ie->xmit_cmds[0]); /* ignore */
bzero((caddr_t)ie->xmit_buffs[0], sizeof *ie->xmit_buffs[0]); /* cast-qual */
bzero((caddr_t)ie->xmit_cmds[1], sizeof *ie->xmit_cmds[0]); /* warnings */
bzero((caddr_t)ie->xmit_buffs[1], sizeof *ie->xmit_buffs[0]); /* here */
/*
* This must be coordinated with iestart() and ietint().
*/
ie->xmit_cmds[0]->ie_xmit_status = IE_STAT_COMPL;
ie->arpcom.ac_if.if_flags |= IFF_RUNNING; /* tell higher levels that we are here */
start_receiver(unit);
return;
}
static void ie_stop(unit)
int unit;
{
command_and_wait(unit, IE_RU_DISABLE, 0, 0);
}
static int
ieioctl(ifp, command, data)
struct ifnet *ifp;
int command;
caddr_t data;
{
struct ifaddr *ifa = (struct ifaddr *)data;
struct ie_softc *ie = &ie_softc[ifp->if_unit];
struct ifreq *ifr = (struct ifreq *) data;
int s, error = 0;
s = splimp();
switch(command) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch(ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
ieinit(ifp->if_unit);
((struct arpcom *)ifp)->ac_ipaddr =
IA_SIN(ifa)->sin_addr;
arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr);
break;
#endif /* INET */
#ifdef NS
/* This magic copied from if_is.c; I don't use XNS, so I have no
* way of telling if this actually works or not.
*/
case AF_NS:
{
struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
if(ns_nullhost(*ina)) {
ina->x_host = *(union ns_host *)(ie->arpcom.ac_enaddr);
} else {
ifp->if_flags &= ~IFF_RUNNING;
bcopy((caddr_t)ina->x_host.c_host,
(caddr_t)ie->arpcom.ac_enaddr,
sizeof ie->arpcom.ac_enaddr);
}
ieinit(ifp->if_unit);
}
break;
#endif /* NS */
default:
ieinit(ifp->if_unit);
break;
}
break;
case SIOCSIFFLAGS:
/*
* Note that this device doesn't have an "all multicast" mode, so we
* must turn on promiscuous mode and do the filtering manually.
*/
if((ifp->if_flags & IFF_UP) == 0 &&
(ifp->if_flags & IFF_RUNNING)) {
ifp->if_flags &= ~IFF_RUNNING;
ie_stop(ifp->if_unit);
} else if((ifp->if_flags & IFF_UP) &&
(ifp->if_flags & IFF_RUNNING) == 0) {
ie_softc[ifp->if_unit].promisc =
ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI);
ieinit(ifp->if_unit);
} else if(ie_softc[ifp->if_unit].promisc ^
(ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI))) {
ie_softc[ifp->if_unit].promisc =
ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI);
ieinit(ifp->if_unit);
}
break;
#ifdef MULTICAST
case SIOCADDMULTI:
case SIOCDELMULTI:
/*
* Update multicast listeners
*/
error = ((command == SIOCADDMULTI)
? ether_addmulti(ifr, &ie->arpcom)
: ether_delmulti(ifr, &ie->arpcom));
if(error == ENETRESET) {
/* reset multicast filtering */
ie_mc_reset(ifp->if_unit);
error = 0;
}
break;
#endif /* MULTICAST */
case SIOCSIFMTU:
/*
* Set the interface MTU.
*/
if (ifr->ifr_mtu > ETHERMTU) {
error = EINVAL;
} else {
ifp->if_mtu = ifr->ifr_mtu;
}
break;
default:
error = EINVAL;
}
splx(s);
return error;
}
#ifdef MULTICAST
static void ie_mc_reset(int unit) {
struct ie_softc *ie = &ie_softc[unit];
struct ether_multi *enm;
struct ether_multistep step;
/*
* Step through the list of addresses.
*/
ie->mcast_count = 0;
ETHER_FIRST_MULTI(step, &ie->arpcom, enm);
while(enm) {
if(ie->mcast_count >= MAXMCAST
|| bcmp(enm->enm_addrlo, enm->enm_addrhi, 6) != 0) {
ie->arpcom.ac_if.if_flags |= IFF_ALLMULTI;
ieioctl(&ie->arpcom.ac_if, SIOCSIFFLAGS, (void *)0);
goto setflag;
}
bcopy(enm->enm_addrlo, &(ie->mcast_addrs[ie->mcast_count]), 6);
ie->mcast_count++;
ETHER_NEXT_MULTI(step, enm);
}
setflag:
ie->want_mcsetup = 1;
}
#endif
#ifdef DEBUG
void print_rbd(volatile struct ie_recv_buf_desc *rbd) {
printf("RBD at %08lx:\n"
"actual %04x, next %04x, buffer %08x\n"
"length %04x, mbz %04x\n",
(unsigned long)rbd,
rbd->ie_rbd_actual, rbd->ie_rbd_next, rbd->ie_rbd_buffer,
rbd->ie_rbd_length, rbd->mbz);
}
#endif /* DEBUG */
#endif /* NIE > 0 */
|