Loading...
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 | /* starfire.c: Linux device driver for the Adaptec Starfire network adapter. */
/*
Written 1998-2000 by Donald Becker.
This software may be used and distributed according to the terms of
the GNU General Public License (GPL), incorporated herein by reference.
Drivers based on or derived from this code fall under the GPL and must
retain the authorship, copyright and license notice. This file is not
a complete program and may only be used when the entire operating
system is licensed under the GPL.
The author may be reached as becker@scyld.com, or C/O
Scyld Computing Corporation
410 Severn Ave., Suite 210
Annapolis MD 21403
Support and updates available at
http://www.scyld.com/network/starfire.html
-----------------------------------------------------------
Linux kernel-specific changes:
LK1.1.1 (jgarzik):
- Use PCI driver interface
- Fix MOD_xxx races
- softnet fixups
LK1.1.2 (jgarzik):
- Merge Becker version 0.15
LK1.1.3 (Andrew Morton)
- Timer cleanups
LK1.1.4 (jgarzik):
- Merge Becker version 1.03
*/
/* These identify the driver base version and may not be removed. */
static const char version1[] =
"starfire.c:v1.03 7/26/2000 Written by Donald Becker <becker@scyld.com>\n";
static const char version2[] =
" Updates and info at http://www.scyld.com/network/starfire.html\n";
static const char version3[] =
" (unofficial 2.4.x kernel port, version 1.1.4, August 10, 2000)\n";
/* The user-configurable values.
These may be modified when a driver module is loaded.*/
/* Used for tuning interrupt latency vs. overhead. */
static int interrupt_mitigation = 0x0;
static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
static int max_interrupt_work = 20;
static int mtu = 0;
/* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
The Starfire has a 512 element hash table based on the Ethernet CRC. */
static int multicast_filter_limit = 32;
/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
Setting to > 1518 effectively disables this feature. */
static int rx_copybreak = 0;
/* Used to pass the media type, etc.
Both 'options[]' and 'full_duplex[]' exist for driver interoperability.
The media type is usually passed in 'options[]'.
*/
#define MAX_UNITS 8 /* More are supported, limit only on options */
static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
/* Operational parameters that are set at compile time. */
/* The "native" ring sizes are either 256 or 2048.
However in some modes a descriptor may be marked to wrap the ring earlier.
The driver allocates a single page for each descriptor ring, constraining
the maximum size in an architecture-dependent way.
*/
#define RX_RING_SIZE 256
#define TX_RING_SIZE 32
/* The completion queues are fixed at 1024 entries i.e. 4K or 8KB. */
#define DONE_Q_SIZE 1024
/* Operational parameters that usually are not changed. */
/* Time in jiffies before concluding the transmitter is hung. */
#define TX_TIMEOUT (2*HZ)
#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
#if !defined(__OPTIMIZE__)
#warning You must compile this file with the correct options!
#warning See the last lines of the source file.
#error You must compile this driver with "-O".
#endif
/* Include files, designed to support most kernel versions 2.0.0 and later. */
#include <linux/version.h>
#include <linux/module.h>
#if LINUX_VERSION_CODE < 0x20300 && defined(MODVERSIONS)
#include <linux/modversions.h>
#endif
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/malloc.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <asm/processor.h> /* Processor type for cache alignment. */
#include <asm/bitops.h>
#include <asm/io.h>
MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
MODULE_DESCRIPTION("Adaptec Starfire Ethernet driver");
MODULE_PARM(max_interrupt_work, "i");
MODULE_PARM(mtu, "i");
MODULE_PARM(debug, "i");
MODULE_PARM(rx_copybreak, "i");
MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
/*
Theory of Operation
I. Board Compatibility
This driver is for the Adaptec 6915 "Starfire" 64 bit PCI Ethernet adapter.
II. Board-specific settings
III. Driver operation
IIIa. Ring buffers
The Starfire hardware uses multiple fixed-size descriptor queues/rings. The
ring sizes are set fixed by the hardware, but may optionally be wrapped
earlier by the END bit in the descriptor.
This driver uses that hardware queue size for the Rx ring, where a large
number of entries has no ill effect beyond increases the potential backlog.
The Tx ring is wrapped with the END bit, since a large hardware Tx queue
disables the queue layer priority ordering and we have no mechanism to
utilize the hardware two-level priority queue. When modifying the
RX/TX_RING_SIZE pay close attention to page sizes and the ring-empty warning
levels.
IIIb/c. Transmit/Receive Structure
See the Adaptec manual for the many possible structures, and options for
each structure. There are far too many to document here.
For transmit this driver uses type 1 transmit descriptors, and relies on
automatic minimum-length padding. It does not use the completion queue
consumer index, but instead checks for non-zero status entries.
For receive this driver uses type 0 receive descriptors. The driver
allocates full frame size skbuffs for the Rx ring buffers, so all frames
should fit in a single descriptor. The driver does not use the completion
queue consumer index, but instead checks for non-zero status entries.
When an incoming frame is less than RX_COPYBREAK bytes long, a fresh skbuff
is allocated and the frame is copied to the new skbuff. When the incoming
frame is larger, the skbuff is passed directly up the protocol stack.
Buffers consumed this way are replaced by newly allocated skbuffs in a later
phase of receive.
A notable aspect of operation is that unaligned buffers are not permitted by
the Starfire hardware. The IP header at offset 14 in an ethernet frame thus
isn't longword aligned, which may cause problems on some machine
e.g. Alphas. Copied frames are put into the skbuff at an offset of "+2",
16-byte aligning the IP header.
IIId. Synchronization
The driver runs as two independent, single-threaded flows of control. One
is the send-packet routine, which enforces single-threaded use by the
dev->tbusy flag. The other thread is the interrupt handler, which is single
threaded by the hardware and interrupt handling software.
The send packet thread has partial control over the Tx ring and 'dev->tbusy'
flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
queue slot is empty, it clears the tbusy flag when finished otherwise it sets
the 'lp->tx_full' flag.
The interrupt handler has exclusive control over the Rx ring and records stats
from the Tx ring. After reaping the stats, it marks the Tx queue entry as
empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it
clears both the tx_full and tbusy flags.
IV. Notes
IVb. References
The Adaptec Starfire manuals, available only from Adaptec.
http://www.scyld.com/expert/100mbps.html
http://www.scyld.com/expert/NWay.html
IVc. Errata
*/
enum chip_capability_flags {CanHaveMII=1, };
#define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_MEM | PCI_ADDR0)
#define MEM_ADDR_SZ 0x80000 /* And maps in 0.5MB(!). */
#if 0
#define ADDR_64BITS 1 /* This chip uses 64 bit addresses. */
#endif
#define HAS_IP_COPYSUM 1
enum chipset {
CH_6915 = 0,
};
static struct pci_device_id starfire_pci_tbl[] __devinitdata = {
{ 0x9004, 0x6915, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_6915 },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, starfire_pci_tbl);
/* A chip capabilities table, matching the CH_xxx entries in xxx_pci_tbl[] above. */
static struct chip_info {
const char *name;
int io_size;
int drv_flags;
} netdrv_tbl[] __devinitdata = {
{ "Adaptec Starfire 6915", MEM_ADDR_SZ, CanHaveMII },
};
/* Offsets to the device registers.
Unlike software-only systems, device drivers interact with complex hardware.
It's not useful to define symbolic names for every register bit in the
device. The name can only partially document the semantics and make
the driver longer and more difficult to read.
In general, only the important configuration values or bits changed
multiple times should be defined symbolically.
*/
enum register_offsets {
PCIDeviceConfig=0x50040, GenCtrl=0x50070, IntrTimerCtrl=0x50074,
IntrClear=0x50080, IntrStatus=0x50084, IntrEnable=0x50088,
MIICtrl=0x52000, StationAddr=0x50120, EEPROMCtrl=0x51000,
TxDescCtrl=0x50090,
TxRingPtr=0x50098, HiPriTxRingPtr=0x50094, /* Low and High priority. */
TxRingHiAddr=0x5009C, /* 64 bit address extension. */
TxProducerIdx=0x500A0, TxConsumerIdx=0x500A4,
TxThreshold=0x500B0,
CompletionHiAddr=0x500B4, TxCompletionAddr=0x500B8,
RxCompletionAddr=0x500BC, RxCompletionQ2Addr=0x500C0,
CompletionQConsumerIdx=0x500C4,
RxDescQCtrl=0x500D4, RxDescQHiAddr=0x500DC, RxDescQAddr=0x500E0,
RxDescQIdx=0x500E8, RxDMAStatus=0x500F0, RxFilterMode=0x500F4,
TxMode=0x55000,
};
/* Bits in the interrupt status/mask registers. */
enum intr_status_bits {
IntrNormalSummary=0x8000, IntrAbnormalSummary=0x02000000,
IntrRxDone=0x0300, IntrRxEmpty=0x10040, IntrRxPCIErr=0x80000,
IntrTxDone=0x4000, IntrTxEmpty=0x1000, IntrTxPCIErr=0x80000,
StatsMax=0x08000000, LinkChange=0xf0000000,
IntrTxDataLow=0x00040000,
};
/* Bits in the RxFilterMode register. */
enum rx_mode_bits {
AcceptBroadcast=0x04, AcceptAllMulticast=0x02, AcceptAll=0x01,
AcceptMulticast=0x10, AcceptMyPhys=0xE040,
};
/* The Rx and Tx buffer descriptors. */
struct starfire_rx_desc {
u32 rxaddr; /* Optionally 64 bits. */
};
enum rx_desc_bits {
RxDescValid=1, RxDescEndRing=2,
};
/* Completion queue entry.
You must update the page allocation, init_ring and the shift count in rx()
if using a larger format. */
struct rx_done_desc {
u32 status; /* Low 16 bits is length. */
#ifdef full_rx_status
u32 status2;
u16 vlanid;
u16 csum; /* partial checksum */
u32 timestamp;
#endif
};
enum rx_done_bits {
RxOK=0x20000000, RxFIFOErr=0x10000000, RxBufQ2=0x08000000,
};
/* Type 1 Tx descriptor. */
struct starfire_tx_desc {
u32 status; /* Upper bits are status, lower 16 length. */
u32 addr;
};
enum tx_desc_bits {
TxDescID=0xB1010000, /* Also marks single fragment, add CRC. */
TxDescIntr=0x08000000, TxRingWrap=0x04000000,
};
struct tx_done_report {
u32 status; /* timestamp, index. */
#if 0
u32 intrstatus; /* interrupt status */
#endif
};
#define PRIV_ALIGN 15 /* Required alignment mask */
struct ring_info {
struct sk_buff *skb;
dma_addr_t mapping;
};
struct netdev_private {
/* Descriptor rings first for alignment. */
struct starfire_rx_desc *rx_ring;
struct starfire_tx_desc *tx_ring;
dma_addr_t rx_ring_dma;
dma_addr_t tx_ring_dma;
/* The addresses of rx/tx-in-place skbuffs. */
struct ring_info rx_info[RX_RING_SIZE];
struct ring_info tx_info[TX_RING_SIZE];
/* Pointers to completion queues (full pages). I should cache line pad..*/
u8 pad0[100];
struct rx_done_desc *rx_done_q;
dma_addr_t rx_done_q_dma;
unsigned int rx_done;
struct tx_done_report *tx_done_q;
unsigned int tx_done;
dma_addr_t tx_done_q_dma;
struct net_device_stats stats;
struct timer_list timer; /* Media monitoring timer. */
struct pci_dev *pci_dev;
/* Frequently used values: keep some adjacent for cache effect. */
unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
unsigned int cur_tx, dirty_tx;
unsigned int rx_buf_sz; /* Based on MTU+slack. */
unsigned int tx_full:1; /* The Tx queue is full. */
/* These values are keep track of the transceiver/media in use. */
unsigned int full_duplex:1, /* Full-duplex operation requested. */
medialock:1, /* Xcvr set to fixed speed/duplex. */
rx_flowctrl:1,
tx_flowctrl:1; /* Use 802.3x flow control. */
unsigned int default_port:4; /* Last dev->if_port value. */
u32 tx_mode;
u8 tx_threshold;
/* MII transceiver section. */
int mii_cnt; /* MII device addresses. */
u16 advertising; /* NWay media advertisement */
unsigned char phys[2]; /* MII device addresses. */
};
static int mdio_read(struct net_device *dev, int phy_id, int location);
static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
static int netdev_open(struct net_device *dev);
static void check_duplex(struct net_device *dev, int startup);
static void netdev_timer(unsigned long data);
static void tx_timeout(struct net_device *dev);
static void init_ring(struct net_device *dev);
static int start_tx(struct sk_buff *skb, struct net_device *dev);
static void intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
static void netdev_error(struct net_device *dev, int intr_status);
static int netdev_rx(struct net_device *dev);
static void netdev_error(struct net_device *dev, int intr_status);
static void set_rx_mode(struct net_device *dev);
static struct net_device_stats *get_stats(struct net_device *dev);
static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static int netdev_close(struct net_device *dev);
static int __devinit starfire_init_one (struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct netdev_private *np;
int i, irq, option, chip_idx = ent->driver_data;
struct net_device *dev;
static int card_idx = -1;
static int printed_version = 0;
long ioaddr;
int drv_flags, io_size = netdrv_tbl[chip_idx].io_size;
card_idx++;
option = card_idx < MAX_UNITS ? options[card_idx] : 0;
if (!printed_version++)
printk(KERN_INFO "%s" KERN_INFO "%s" KERN_INFO "%s",
version1, version2, version3);
ioaddr = pci_resource_start (pdev, 0);
if (!ioaddr || ((pci_resource_flags (pdev, 0) & IORESOURCE_MEM) == 0)) {
printk (KERN_ERR "starfire %d: no PCI MEM resources, aborting\n", card_idx);
return -ENODEV;
}
dev = init_etherdev(NULL, sizeof(*np));
if (!dev) {
printk (KERN_ERR "starfire %d: cannot alloc etherdev, aborting\n", card_idx);
return -ENOMEM;
}
irq = pdev->irq;
if (request_mem_region (ioaddr, io_size, dev->name) == NULL) {
printk (KERN_ERR "starfire %d: resource 0x%x @ 0x%lx busy, aborting\n",
card_idx, io_size, ioaddr);
goto err_out_free_netdev;
}
if (pci_enable_device (pdev))
goto err_out_free_res;
ioaddr = (long) ioremap (ioaddr, io_size);
if (!ioaddr) {
printk (KERN_ERR "starfire %d: cannot remap 0x%x @ 0x%lx, aborting\n",
card_idx, io_size, ioaddr);
goto err_out_free_res;
}
pci_set_master (pdev);
printk(KERN_INFO "%s: %s at 0x%lx, ",
dev->name, netdrv_tbl[chip_idx].name, ioaddr);
/* Serial EEPROM reads are hidden by the hardware. */
for (i = 0; i < 6; i++)
dev->dev_addr[i] = readb(ioaddr + EEPROMCtrl + 20-i);
for (i = 0; i < 5; i++)
printk("%2.2x:", dev->dev_addr[i]);
printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
#if ! defined(final_version) /* Dump the EEPROM contents during development. */
if (debug > 4)
for (i = 0; i < 0x20; i++)
printk("%2.2x%s", (unsigned int)readb(ioaddr + EEPROMCtrl + i),
i % 16 != 15 ? " " : "\n");
#endif
/* Reset the chip to erase previous misconfiguration. */
writel(1, ioaddr + PCIDeviceConfig);
dev->base_addr = ioaddr;
dev->irq = irq;
np = dev->priv;
pdev->driver_data = dev;
np->pci_dev = pdev;
drv_flags = netdrv_tbl[chip_idx].drv_flags;
if (dev->mem_start)
option = dev->mem_start;
/* The lower four bits are the media type. */
if (option > 0) {
if (option & 0x200)
np->full_duplex = 1;
np->default_port = option & 15;
if (np->default_port)
np->medialock = 1;
}
if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0)
np->full_duplex = 1;
if (np->full_duplex)
np->medialock = 1;
/* The chip-specific entries in the device structure. */
dev->open = &netdev_open;
dev->hard_start_xmit = &start_tx;
dev->tx_timeout = &tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
dev->stop = &netdev_close;
dev->get_stats = &get_stats;
dev->set_multicast_list = &set_rx_mode;
dev->do_ioctl = &mii_ioctl;
if (mtu)
dev->mtu = mtu;
if (drv_flags & CanHaveMII) {
int phy, phy_idx = 0;
for (phy = 0; phy < 32 && phy_idx < 4; phy++) {
int mii_status = mdio_read(dev, phy, 1);
if (mii_status != 0xffff && mii_status != 0x0000) {
np->phys[phy_idx++] = phy;
np->advertising = mdio_read(dev, phy, 4);
printk(KERN_INFO "%s: MII PHY found at address %d, status "
"0x%4.4x advertising %4.4x.\n",
dev->name, phy, mii_status, np->advertising);
}
}
np->mii_cnt = phy_idx;
}
return 0;
err_out_free_res:
release_mem_region (ioaddr, io_size);
err_out_free_netdev:
unregister_netdev (dev);
kfree (dev);
return -ENODEV;
}
/* Read the MII Management Data I/O (MDIO) interfaces. */
static int mdio_read(struct net_device *dev, int phy_id, int location)
{
long mdio_addr = dev->base_addr + MIICtrl + (phy_id<<7) + (location<<2);
int result, boguscnt=1000;
/* ??? Should we add a busy-wait here? */
do
result = readl(mdio_addr);
while ((result & 0xC0000000) != 0x80000000 && --boguscnt >= 0);
return result & 0xffff;
}
static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
{
long mdio_addr = dev->base_addr + MIICtrl + (phy_id<<7) + (location<<2);
writel(value, mdio_addr);
/* The busy-wait will occur before a read. */
return;
}
static int netdev_open(struct net_device *dev)
{
struct netdev_private *np = (struct netdev_private *)dev->priv;
long ioaddr = dev->base_addr;
int i, retval;
/* Do we ever need to reset the chip??? */
MOD_INC_USE_COUNT;
retval = request_irq(dev->irq, &intr_handler, SA_SHIRQ, dev->name, dev);
if (retval) {
MOD_DEC_USE_COUNT;
return retval;
}
/* Disable the Rx and Tx, and reset the chip. */
writel(0, ioaddr + GenCtrl);
writel(1, ioaddr + PCIDeviceConfig);
if (debug > 1)
printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
dev->name, dev->irq);
/* Allocate the various queues, failing gracefully. */
if (np->tx_done_q == 0)
np->tx_done_q = pci_alloc_consistent(np->pci_dev, PAGE_SIZE, &np->tx_done_q_dma);
if (np->rx_done_q == 0)
np->rx_done_q = pci_alloc_consistent(np->pci_dev, PAGE_SIZE, &np->rx_done_q_dma);
if (np->tx_ring == 0)
np->tx_ring = pci_alloc_consistent(np->pci_dev, PAGE_SIZE, &np->tx_ring_dma);
if (np->rx_ring == 0)
np->rx_ring = pci_alloc_consistent(np->pci_dev, PAGE_SIZE, &np->rx_ring_dma);
if (np->tx_done_q == 0 || np->rx_done_q == 0
|| np->rx_ring == 0 || np->tx_ring == 0) {
if (np->tx_done_q)
pci_free_consistent(np->pci_dev, PAGE_SIZE,
np->tx_done_q, np->tx_done_q_dma);
if (np->rx_done_q)
pci_free_consistent(np->pci_dev, PAGE_SIZE,
np->rx_done_q, np->rx_done_q_dma);
if (np->tx_ring)
pci_free_consistent(np->pci_dev, PAGE_SIZE,
np->tx_ring, np->tx_ring_dma);
if (np->rx_ring)
pci_free_consistent(np->pci_dev, PAGE_SIZE,
np->rx_ring, np->rx_ring_dma);
MOD_DEC_USE_COUNT;
return -ENOMEM;
}
init_ring(dev);
/* Set the size of the Rx buffers. */
writel((np->rx_buf_sz<<16) | 0xA000, ioaddr + RxDescQCtrl);
/* Set Tx descriptor to type 1 and padding to 0 bytes. */
writel(0x02000401, ioaddr + TxDescCtrl);
#if defined(ADDR_64BITS) && defined(__alpha__)
/* XXX We really need a 64-bit PCI dma interfaces too... -DaveM */
writel(np->rx_ring_dma >> 32, ioaddr + RxDescQHiAddr);
writel(np->tx_ring_dma >> 32, ioaddr + TxRingHiAddr);
#else
writel(0, ioaddr + RxDescQHiAddr);
writel(0, ioaddr + TxRingHiAddr);
writel(0, ioaddr + CompletionHiAddr);
#endif
writel(np->rx_ring_dma, ioaddr + RxDescQAddr);
writel(np->tx_ring_dma, ioaddr + TxRingPtr);
writel(np->tx_done_q_dma, ioaddr + TxCompletionAddr);
writel(np->rx_done_q_dma, ioaddr + RxCompletionAddr);
if (debug > 1)
printk(KERN_DEBUG "%s: Filling in the station address.\n", dev->name);
/* Fill both the unused Tx SA register and the Rx perfect filter. */
for (i = 0; i < 6; i++)
writeb(dev->dev_addr[i], ioaddr + StationAddr + 5-i);
for (i = 0; i < 16; i++) {
u16 *eaddrs = (u16 *)dev->dev_addr;
long setup_frm = ioaddr + 0x56000 + i*16;
writew(cpu_to_be16(eaddrs[2]), setup_frm); setup_frm += 4;
writew(cpu_to_be16(eaddrs[1]), setup_frm); setup_frm += 4;
writew(cpu_to_be16(eaddrs[0]), setup_frm); setup_frm += 8;
}
/* Initialize other registers. */
/* Configure the PCI bus bursts and FIFO thresholds. */
np->tx_mode = 0; /* Initialized when TxMode set. */
np->tx_threshold = 4;
writel(np->tx_threshold, ioaddr + TxThreshold);
writel(interrupt_mitigation, ioaddr + IntrTimerCtrl);
if (dev->if_port == 0)
dev->if_port = np->default_port;
netif_start_queue(dev);
if (debug > 1)
printk(KERN_DEBUG "%s: Setting the Rx and Tx modes.\n", dev->name);
set_rx_mode(dev);
np->advertising = mdio_read(dev, np->phys[0], 4);
check_duplex(dev, 1);
/* Set the interrupt mask and enable PCI interrupts. */
writel(IntrRxDone | IntrRxEmpty | IntrRxPCIErr |
IntrTxDone | IntrTxEmpty | IntrTxPCIErr |
StatsMax | LinkChange | IntrNormalSummary | IntrAbnormalSummary
| 0x0010 , ioaddr + IntrEnable);
writel(0x00800000 | readl(ioaddr + PCIDeviceConfig),
ioaddr + PCIDeviceConfig);
/* Enable the Rx and Tx units. */
writel(0x000F, ioaddr + GenCtrl);
if (debug > 2)
printk(KERN_DEBUG "%s: Done netdev_open().\n",
dev->name);
/* Set the timer to check for link beat. */
init_timer(&np->timer);
np->timer.expires = jiffies + 3*HZ;
np->timer.data = (unsigned long)dev;
np->timer.function = &netdev_timer; /* timer handler */
add_timer(&np->timer);
return 0;
}
static void check_duplex(struct net_device *dev, int startup)
{
struct netdev_private *np = (struct netdev_private *)dev->priv;
long ioaddr = dev->base_addr;
int new_tx_mode ;
new_tx_mode = 0x0C04 | (np->tx_flowctrl ? 0x0800:0)
| (np->rx_flowctrl ? 0x0400:0);
if (np->medialock) {
if (np->full_duplex)
new_tx_mode |= 2;
} else {
int mii_reg5 = mdio_read(dev, np->phys[0], 5);
int negotiated = mii_reg5 & np->advertising;
int duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
if (duplex)
new_tx_mode |= 2;
if (np->full_duplex != duplex) {
np->full_duplex = duplex;
if (debug > 1)
printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d"
" negotiated capability %4.4x.\n", dev->name,
duplex ? "full" : "half", np->phys[0], negotiated);
}
}
if (new_tx_mode != np->tx_mode) {
np->tx_mode = new_tx_mode;
writel(np->tx_mode | 0x8000, ioaddr + TxMode);
writel(np->tx_mode, ioaddr + TxMode);
}
}
static void netdev_timer(unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
struct netdev_private *np = (struct netdev_private *)dev->priv;
long ioaddr = dev->base_addr;
int next_tick = 60*HZ; /* Check before driver release. */
if (debug > 3) {
printk(KERN_DEBUG "%s: Media selection timer tick, status %8.8x.\n",
dev->name, (int)readl(ioaddr + IntrStatus));
}
check_duplex(dev, 0);
#if ! defined(final_version)
/* This is often falsely triggered. */
if (readl(ioaddr + IntrStatus) & 1) {
int new_status = readl(ioaddr + IntrStatus);
/* Bogus hardware IRQ: Fake an interrupt handler call. */
if (new_status & 1) {
printk(KERN_ERR "%s: Interrupt blocked, status %8.8x/%8.8x.\n",
dev->name, new_status, (int)readl(ioaddr + IntrStatus));
intr_handler(dev->irq, dev, 0);
}
}
#endif
np->timer.expires = jiffies + next_tick;
add_timer(&np->timer);
}
static void tx_timeout(struct net_device *dev)
{
struct netdev_private *np = (struct netdev_private *)dev->priv;
long ioaddr = dev->base_addr;
printk(KERN_WARNING "%s: Transmit timed out, status %8.8x,"
" resetting...\n", dev->name, (int)readl(ioaddr + IntrStatus));
#ifndef __alpha__
{
int i;
printk(KERN_DEBUG " Rx ring %p: ", np->rx_ring);
for (i = 0; i < RX_RING_SIZE; i++)
printk(" %8.8x", (unsigned int)le32_to_cpu(np->rx_ring[i].rxaddr));
printk("\n"KERN_DEBUG" Tx ring %p: ", np->tx_ring);
for (i = 0; i < TX_RING_SIZE; i++)
printk(" %4.4x", le32_to_cpu(np->tx_ring[i].status));
printk("\n");
}
#endif
/* Perhaps we should reinitialize the hardware here. */
dev->if_port = 0;
/* Stop and restart the chip's Tx processes . */
/* Trigger an immediate transmit demand. */
dev->trans_start = jiffies;
np->stats.tx_errors++;
return;
}
/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
static void init_ring(struct net_device *dev)
{
struct netdev_private *np = (struct netdev_private *)dev->priv;
int i;
np->tx_full = 0;
np->cur_rx = np->cur_tx = 0;
np->dirty_rx = np->rx_done = np->dirty_tx = np->tx_done = 0;
np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
/* Fill in the Rx buffers. Handle allocation failure gracefully. */
for (i = 0; i < RX_RING_SIZE; i++) {
struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
np->rx_info[i].skb = skb;
if (skb == NULL)
break;
np->rx_info[i].mapping = pci_map_single(np->pci_dev, skb->tail, np->rx_buf_sz, PCI_DMA_FROMDEVICE);
skb->dev = dev; /* Mark as being used by this device. */
/* Grrr, we cannot offset to correctly align the IP header. */
np->rx_ring[i].rxaddr = cpu_to_le32(np->rx_info[i].mapping | RxDescValid);
}
writew(i - 1, dev->base_addr + RxDescQIdx);
np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
/* Clear the remainder of the Rx buffer ring. */
for ( ; i < RX_RING_SIZE; i++) {
np->rx_ring[i].rxaddr = 0;
np->rx_info[i].skb = NULL;
np->rx_info[i].mapping = 0;
}
/* Mark the last entry as wrapping the ring. */
np->rx_ring[i-1].rxaddr |= cpu_to_le32(RxDescEndRing);
/* Clear the completion rings. */
for (i = 0; i < DONE_Q_SIZE; i++) {
np->rx_done_q[i].status = 0;
np->tx_done_q[i].status = 0;
}
for (i = 0; i < TX_RING_SIZE; i++) {
np->tx_info[i].skb = NULL;
np->tx_info[i].mapping = 0;
np->tx_ring[i].status = 0;
}
return;
}
static int start_tx(struct sk_buff *skb, struct net_device *dev)
{
struct netdev_private *np = (struct netdev_private *)dev->priv;
unsigned entry;
/* Caution: the write order is important here, set the field
with the "ownership" bits last. */
/* Calculate the next Tx descriptor entry. */
entry = np->cur_tx % TX_RING_SIZE;
np->tx_info[entry].skb = skb;
np->tx_info[entry].mapping =
pci_map_single(np->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
np->tx_ring[entry].addr = cpu_to_le32(np->tx_info[entry].mapping);
/* Add "| TxDescIntr" to generate Tx-done interrupts. */
np->tx_ring[entry].status = cpu_to_le32(skb->len | TxDescID);
if (debug > 5) {
printk(KERN_DEBUG "%s: Tx #%d slot %d %8.8x %8.8x.\n",
dev->name, np->cur_tx, entry,
le32_to_cpu(np->tx_ring[entry].status),
le32_to_cpu(np->tx_ring[entry].addr));
}
np->cur_tx++;
#if 1
if (entry >= TX_RING_SIZE-1) { /* Wrap ring */
np->tx_ring[entry].status |= cpu_to_le32(TxRingWrap | TxDescIntr);
entry = -1;
}
#endif
/* Non-x86: explicitly flush descriptor cache lines here. */
/* Update the producer index. */
writel(++entry, dev->base_addr + TxProducerIdx);
if (np->cur_tx - np->dirty_tx >= TX_RING_SIZE - 1) {
np->tx_full = 1;
netif_stop_queue(dev);
}
dev->trans_start = jiffies;
if (debug > 4) {
printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n",
dev->name, np->cur_tx, entry);
}
return 0;
}
/* The interrupt handler does all of the Rx thread work and cleans up
after the Tx thread. */
static void intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
{
struct net_device *dev = (struct net_device *)dev_instance;
struct netdev_private *np;
long ioaddr;
int boguscnt = max_interrupt_work;
#ifndef final_version /* Can never occur. */
if (dev == NULL) {
printk (KERN_ERR "Netdev interrupt handler(): IRQ %d for unknown "
"device.\n", irq);
return;
}
#endif
ioaddr = dev->base_addr;
np = (struct netdev_private *)dev->priv;
do {
u32 intr_status = readl(ioaddr + IntrClear);
if (debug > 4)
printk(KERN_DEBUG "%s: Interrupt status %4.4x.\n",
dev->name, intr_status);
if (intr_status == 0)
break;
if (intr_status & IntrRxDone)
netdev_rx(dev);
/* Scavenge the skbuff list based on the Tx-done queue.
There are redundant checks here that may be cleaned up
after the driver has proven to be reliable. */
{
int consumer = readl(ioaddr + TxConsumerIdx);
int tx_status;
if (debug > 4)
printk(KERN_DEBUG "%s: Tx Consumer index is %d.\n",
dev->name, consumer);
#if 0
if (np->tx_done >= 250 || np->tx_done == 0)
printk(KERN_DEBUG "%s: Tx completion entry %d is %8.8x, "
"%d is %8.8x.\n", dev->name,
np->tx_done, le32_to_cpu(np->tx_done_q[np->tx_done].status),
(np->tx_done+1) & (DONE_Q_SIZE-1),
le32_to_cpu(np->tx_done_q[(np->tx_done+1)&(DONE_Q_SIZE-1)].status));
#endif
while ((tx_status = le32_to_cpu(np->tx_done_q[np->tx_done].status))
!= 0) {
if (debug > 4)
printk(KERN_DEBUG "%s: Tx completion entry %d is %8.8x.\n",
dev->name, np->tx_done, tx_status);
if ((tx_status & 0xe0000000) == 0xa0000000) {
np->stats.tx_packets++;
} else if ((tx_status & 0xe0000000) == 0x80000000) {
struct sk_buff *skb;
u16 entry = tx_status; /* Implicit truncate */
entry >>= 3;
skb = np->tx_info[entry].skb;
pci_unmap_single(np->pci_dev,
np->tx_info[entry].mapping,
skb->len, PCI_DMA_TODEVICE);
/* Scavenge the descriptor. */
dev_kfree_skb_irq(skb);
np->tx_info[entry].skb = NULL;
np->tx_info[entry].mapping = 0;
np->dirty_tx++;
}
np->tx_done_q[np->tx_done].status = 0;
np->tx_done = (np->tx_done+1) & (DONE_Q_SIZE-1);
}
writew(np->tx_done, ioaddr + CompletionQConsumerIdx + 2);
}
if (np->tx_full && np->cur_tx - np->dirty_tx < TX_RING_SIZE - 4) {
/* The ring is no longer full, wake the queue. */
np->tx_full = 0;
netif_wake_queue(dev);
}
/* Abnormal error summary/uncommon events handlers. */
if (intr_status & IntrAbnormalSummary)
netdev_error(dev, intr_status);
if (--boguscnt < 0) {
printk(KERN_WARNING "%s: Too much work at interrupt, "
"status=0x%4.4x.\n",
dev->name, intr_status);
break;
}
} while (1);
if (debug > 4)
printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
dev->name, (int)readl(ioaddr + IntrStatus));
#ifndef final_version
/* Code that should never be run! Remove after testing.. */
{
static int stopit = 10;
if (!netif_running(dev) && --stopit < 0) {
printk(KERN_ERR "%s: Emergency stop, looping startup interrupt.\n",
dev->name);
free_irq(irq, dev);
}
}
#endif
}
/* This routine is logically part of the interrupt handler, but separated
for clarity and better register allocation. */
static int netdev_rx(struct net_device *dev)
{
struct netdev_private *np = (struct netdev_private *)dev->priv;
int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
u32 desc_status;
if (np->rx_done_q == 0) {
printk(KERN_ERR "%s: rx_done_q is NULL! rx_done is %d. %p.\n",
dev->name, np->rx_done, np->tx_done_q);
return 0;
}
/* If EOP is set on the next entry, it's a new packet. Send it up. */
while ((desc_status = le32_to_cpu(np->rx_done_q[np->rx_done].status)) != 0) {
if (debug > 4)
printk(KERN_DEBUG " netdev_rx() status of %d was %8.8x.\n",
np->rx_done, desc_status);
if (--boguscnt < 0)
break;
if ( ! (desc_status & RxOK)) {
/* There was a error. */
if (debug > 2)
printk(KERN_DEBUG " netdev_rx() Rx error was %8.8x.\n",
desc_status);
np->stats.rx_errors++;
if (desc_status & RxFIFOErr)
np->stats.rx_fifo_errors++;
} else {
struct sk_buff *skb;
u16 pkt_len = desc_status; /* Implicitly Truncate */
int entry = (desc_status >> 16) & 0x7ff;
#ifndef final_version
if (debug > 4)
printk(KERN_DEBUG " netdev_rx() normal Rx pkt length %d"
", bogus_cnt %d.\n",
pkt_len, boguscnt);
#endif
/* Check if the packet is long enough to accept without copying
to a minimally-sized skbuff. */
if (pkt_len < rx_copybreak
&& (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
skb->dev = dev;
skb_reserve(skb, 2); /* 16 byte align the IP header */
pci_dma_sync_single(np->pci_dev,
np->rx_info[entry].mapping,
pkt_len, PCI_DMA_FROMDEVICE);
#if HAS_IP_COPYSUM /* Call copy + cksum if available. */
eth_copy_and_sum(skb, np->rx_info[entry].skb->tail, pkt_len, 0);
skb_put(skb, pkt_len);
#else
memcpy(skb_put(skb, pkt_len), np->rx_info[entry].skb->tail,
pkt_len);
#endif
} else {
char *temp;
pci_unmap_single(np->pci_dev, np->rx_info[entry].mapping, np->rx_buf_sz, PCI_DMA_FROMDEVICE);
skb = np->rx_info[entry].skb;
temp = skb_put(skb, pkt_len);
np->rx_info[entry].skb = NULL;
np->rx_info[entry].mapping = 0;
#ifndef final_version /* Remove after testing. */
if (le32_to_cpu(np->rx_ring[entry].rxaddr & ~3) != ((unsigned long) temp))
printk(KERN_ERR "%s: Internal fault: The skbuff addresses "
"do not match in netdev_rx: %d vs. %p / %p.\n",
dev->name,
le32_to_cpu(np->rx_ring[entry].rxaddr),
skb->head, temp);
#endif
}
#ifndef final_version /* Remove after testing. */
/* You will want this info for the initial debug. */
if (debug > 5)
printk(KERN_DEBUG " Rx data %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:"
"%2.2x %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x %2.2x%2.2x "
"%d.%d.%d.%d.\n",
skb->data[0], skb->data[1], skb->data[2], skb->data[3],
skb->data[4], skb->data[5], skb->data[6], skb->data[7],
skb->data[8], skb->data[9], skb->data[10],
skb->data[11], skb->data[12], skb->data[13],
skb->data[14], skb->data[15], skb->data[16],
skb->data[17]);
#endif
skb->protocol = eth_type_trans(skb, dev);
#ifdef full_rx_status
if (le32_to_cpu(np->rx_done_q[np->rx_done].status2) & 0x01000000)
skb->ip_summed = CHECKSUM_UNNECESSARY;
#endif
netif_rx(skb);
dev->last_rx = jiffies;
np->stats.rx_packets++;
}
np->cur_rx++;
np->rx_done_q[np->rx_done].status = 0;
np->rx_done = (np->rx_done + 1) & (DONE_Q_SIZE-1);
}
writew(np->rx_done, dev->base_addr + CompletionQConsumerIdx);
/* Refill the Rx ring buffers. */
for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
struct sk_buff *skb;
int entry = np->dirty_rx % RX_RING_SIZE;
if (np->rx_info[entry].skb == NULL) {
skb = dev_alloc_skb(np->rx_buf_sz);
np->rx_info[entry].skb = skb;
if (skb == NULL)
break; /* Better luck next round. */
np->rx_info[entry].mapping =
pci_map_single(np->pci_dev, skb->tail, np->rx_buf_sz, PCI_DMA_FROMDEVICE);
skb->dev = dev; /* Mark as being used by this device. */
np->rx_ring[entry].rxaddr =
cpu_to_le32(np->rx_info[entry].mapping | RxDescValid);
}
if (entry == RX_RING_SIZE - 1)
np->rx_ring[entry].rxaddr |= cpu_to_le32(RxDescEndRing);
/* We could defer this until later... */
writew(entry, dev->base_addr + RxDescQIdx);
}
if (debug > 5
|| memcmp(np->pad0, np->pad0 + 1, sizeof(np->pad0) -1))
printk(KERN_DEBUG " exiting netdev_rx() status of %d was %8.8x %d.\n",
np->rx_done, desc_status,
memcmp(np->pad0, np->pad0 + 1, sizeof(np->pad0) -1));
/* Restart Rx engine if stopped. */
return 0;
}
static void netdev_error(struct net_device *dev, int intr_status)
{
struct netdev_private *np = (struct netdev_private *)dev->priv;
if (intr_status & LinkChange) {
printk(KERN_NOTICE "%s: Link changed: Autonegotiation advertising"
" %4.4x partner %4.4x.\n", dev->name,
mdio_read(dev, np->phys[0], 4),
mdio_read(dev, np->phys[0], 5));
check_duplex(dev, 0);
}
if (intr_status & StatsMax) {
get_stats(dev);
}
/* Came close to underrunning the Tx FIFO, increase threshold. */
if (intr_status & IntrTxDataLow)
writel(++np->tx_threshold, dev->base_addr + TxThreshold);
if ((intr_status &
~(IntrAbnormalSummary|LinkChange|StatsMax|IntrTxDataLow|1)) && debug)
printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
dev->name, intr_status);
/* Hmmmmm, it's not clear how to recover from PCI faults. */
if (intr_status & IntrTxPCIErr)
np->stats.tx_fifo_errors++;
if (intr_status & IntrRxPCIErr)
np->stats.rx_fifo_errors++;
}
static struct net_device_stats *get_stats(struct net_device *dev)
{
long ioaddr = dev->base_addr;
struct netdev_private *np = (struct netdev_private *)dev->priv;
/* This adapter architecture needs no SMP locks. */
np->stats.tx_bytes = readl(ioaddr + 0x57010);
np->stats.rx_bytes = readl(ioaddr + 0x57044);
np->stats.tx_packets = readl(ioaddr + 0x57000);
np->stats.tx_aborted_errors =
readl(ioaddr + 0x57024) + readl(ioaddr + 0x57028);
np->stats.tx_window_errors = readl(ioaddr + 0x57018);
np->stats.collisions = readl(ioaddr + 0x57004) + readl(ioaddr + 0x57008);
/* The chip only need report frame silently dropped. */
np->stats.rx_dropped += readw(ioaddr + RxDMAStatus);
writew(0, ioaddr + RxDMAStatus);
np->stats.rx_crc_errors = readl(ioaddr + 0x5703C);
np->stats.rx_frame_errors = readl(ioaddr + 0x57040);
np->stats.rx_length_errors = readl(ioaddr + 0x57058);
np->stats.rx_missed_errors = readl(ioaddr + 0x5707C);
return &np->stats;
}
/* The little-endian AUTODIN II ethernet CRC calculations.
A big-endian version is also available.
This is slow but compact code. Do not use this routine for bulk data,
use a table-based routine instead.
This is common code and should be moved to net/core/crc.c.
Chips may use the upper or lower CRC bits, and may reverse and/or invert
them. Select the endian-ness that results in minimal calculations.
*/
static unsigned const ethernet_polynomial_le = 0xedb88320U;
static inline unsigned ether_crc_le(int length, unsigned char *data)
{
unsigned int crc = 0xffffffff; /* Initial value. */
while(--length >= 0) {
unsigned char current_octet = *data++;
int bit;
for (bit = 8; --bit >= 0; current_octet >>= 1) {
if ((crc ^ current_octet) & 1) {
crc >>= 1;
crc ^= ethernet_polynomial_le;
} else
crc >>= 1;
}
}
return crc;
}
static void set_rx_mode(struct net_device *dev)
{
long ioaddr = dev->base_addr;
u32 rx_mode;
struct dev_mc_list *mclist;
int i;
if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
/* Unconditionally log net taps. */
printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name);
rx_mode = AcceptBroadcast|AcceptAllMulticast|AcceptAll|AcceptMyPhys;
} else if ((dev->mc_count > multicast_filter_limit)
|| (dev->flags & IFF_ALLMULTI)) {
/* Too many to match, or accept all multicasts. */
rx_mode = AcceptBroadcast|AcceptAllMulticast|AcceptMyPhys;
} else if (dev->mc_count <= 15) {
/* Use the 16 element perfect filter. */
long filter_addr = ioaddr + 0x56000 + 1*16;
for (i = 1, mclist = dev->mc_list; mclist && i <= dev->mc_count;
i++, mclist = mclist->next) {
u16 *eaddrs = (u16 *)mclist->dmi_addr;
writew(cpu_to_be16(eaddrs[2]), filter_addr); filter_addr += 4;
writew(cpu_to_be16(eaddrs[1]), filter_addr); filter_addr += 4;
writew(cpu_to_be16(eaddrs[0]), filter_addr); filter_addr += 8;
}
while (i++ < 16) {
writew(0xffff, filter_addr); filter_addr += 4;
writew(0xffff, filter_addr); filter_addr += 4;
writew(0xffff, filter_addr); filter_addr += 8;
}
rx_mode = AcceptBroadcast | AcceptMyPhys;
} else {
/* Must use a multicast hash table. */
long filter_addr;
u16 mc_filter[32] __attribute__ ((aligned(sizeof(long)))); /* Multicast hash filter */
memset(mc_filter, 0, sizeof(mc_filter));
for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
i++, mclist = mclist->next) {
set_bit(ether_crc_le(ETH_ALEN, mclist->dmi_addr) >> 23, mc_filter);
}
/* Clear the perfect filter list. */
filter_addr = ioaddr + 0x56000 + 1*16;
for (i = 1; i < 16; i++) {
writew(0xffff, filter_addr); filter_addr += 4;
writew(0xffff, filter_addr); filter_addr += 4;
writew(0xffff, filter_addr); filter_addr += 8;
}
for (filter_addr=ioaddr + 0x56100, i=0; i < 32; filter_addr+= 16, i++)
writew(mc_filter[i], filter_addr);
rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
}
writel(rx_mode, ioaddr + RxFilterMode);
}
static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct netdev_private *np = (struct netdev_private *)dev->priv;
u16 *data = (u16 *)&rq->ifr_data;
switch(cmd) {
case SIOCDEVPRIVATE: /* Get the address of the PHY in use. */
data[0] = np->phys[0] & 0x1f;
/* Fall Through */
case SIOCDEVPRIVATE+1: /* Read the specified MII register. */
data[3] = mdio_read(dev, data[0] & 0x1f, data[1] & 0x1f);
return 0;
case SIOCDEVPRIVATE+2: /* Write the specified MII register */
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (data[0] == np->phys[0]) {
u16 value = data[2];
switch (data[1]) {
case 0:
if (value & 0x9000) /* Autonegotiation. */
np->medialock = 0;
else {
np->full_duplex = (value & 0x0100) ? 1 : 0;
np->medialock = 1;
}
break;
case 4: np->advertising = value; break;
}
check_duplex(dev, 0);
}
mdio_write(dev, data[0] & 0x1f, data[1] & 0x1f, data[2]);
return 0;
default:
return -EOPNOTSUPP;
}
}
static int netdev_close(struct net_device *dev)
{
long ioaddr = dev->base_addr;
struct netdev_private *np = (struct netdev_private *)dev->priv;
int i;
netif_stop_queue(dev);
del_timer_sync(&np->timer);
if (debug > 1) {
printk(KERN_DEBUG "%s: Shutting down ethercard, Intr status %4.4x.\n",
dev->name, (int)readl(ioaddr + IntrStatus));
printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
}
/* Disable interrupts by clearing the interrupt mask. */
writel(0, ioaddr + IntrEnable);
/* Stop the chip's Tx and Rx processes. */
#ifdef __i386__
if (debug > 2) {
printk("\n"KERN_DEBUG" Tx ring at %8.8x:\n",
np->tx_ring_dma);
for (i = 0; i < 8 /* TX_RING_SIZE is huge! */; i++)
printk(KERN_DEBUG " #%d desc. %8.8x %8.8x -> %8.8x.\n",
i, le32_to_cpu(np->tx_ring[i].status),
le32_to_cpu(np->tx_ring[i].addr),
le32_to_cpu(np->tx_done_q[i].status));
printk(KERN_DEBUG " Rx ring at %8.8x -> %p:\n",
np->rx_ring_dma, np->rx_done_q);
if (np->rx_done_q)
for (i = 0; i < 8 /* RX_RING_SIZE */; i++) {
printk(KERN_DEBUG " #%d desc. %8.8x -> %8.8x\n",
i, le32_to_cpu(np->rx_ring[i].rxaddr), le32_to_cpu(np->rx_done_q[i].status));
}
}
#endif /* __i386__ debugging only */
free_irq(dev->irq, dev);
/* Free all the skbuffs in the Rx queue. */
for (i = 0; i < RX_RING_SIZE; i++) {
np->rx_ring[i].rxaddr = cpu_to_le32(0xBADF00D0); /* An invalid address. */
if (np->rx_info[i].skb != NULL) {
pci_unmap_single(np->pci_dev, np->rx_info[i].mapping, np->rx_buf_sz, PCI_DMA_FROMDEVICE);
dev_kfree_skb(np->rx_info[i].skb);
}
np->rx_info[i].skb = NULL;
np->rx_info[i].mapping = 0;
}
for (i = 0; i < TX_RING_SIZE; i++) {
struct sk_buff *skb = np->tx_info[i].skb;
if (skb != NULL) {
pci_unmap_single(np->pci_dev,
np->tx_info[i].mapping,
skb->len, PCI_DMA_TODEVICE);
dev_kfree_skb(skb);
}
np->tx_info[i].skb = NULL;
np->tx_info[i].mapping = 0;
}
MOD_DEC_USE_COUNT;
return 0;
}
static void __devexit starfire_remove_one (struct pci_dev *pdev)
{
struct net_device *dev = pdev->driver_data;
struct netdev_private *np;
if (!dev)
BUG();
np = dev->priv;
unregister_netdev(dev);
iounmap((char *)dev->base_addr);
if (np->tx_done_q)
pci_free_consistent(np->pci_dev, PAGE_SIZE,
np->tx_done_q, np->tx_done_q_dma);
if (np->rx_done_q)
pci_free_consistent(np->pci_dev, PAGE_SIZE,
np->rx_done_q, np->rx_done_q_dma);
if (np->tx_ring)
pci_free_consistent(np->pci_dev, PAGE_SIZE,
np->tx_ring, np->tx_ring_dma);
if (np->rx_ring)
pci_free_consistent(np->pci_dev, PAGE_SIZE,
np->rx_ring, np->rx_ring_dma);
kfree(dev);
}
static struct pci_driver starfire_driver = {
name: "starfire",
probe: starfire_init_one,
remove: starfire_remove_one,
id_table: starfire_pci_tbl,
};
static int __init starfire_init (void)
{
return pci_module_init (&starfire_driver);
}
static void __exit starfire_cleanup (void)
{
pci_unregister_driver (&starfire_driver);
}
module_init(starfire_init);
module_exit(starfire_cleanup);
/*
* Local variables:
* compile-command: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c starfire.c"
* simple-compile-command: "gcc -DMODULE -O6 -c starfire.c"
* c-indent-level: 4
* c-basic-offset: 4
* tab-width: 4
* End:
*/
|