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1/*
2
3 8139too.c: A RealTek RTL-8139 Fast Ethernet driver for Linux.
4
5 Maintained by Jeff Garzik <jgarzik@pobox.com>
6 Copyright 2000-2002 Jeff Garzik
7
8 Much code comes from Donald Becker's rtl8139.c driver,
9 versions 1.13 and older. This driver was originally based
10 on rtl8139.c version 1.07. Header of rtl8139.c version 1.13:
11
12 -----<snip>-----
13
14 Written 1997-2001 by Donald Becker.
15 This software may be used and distributed according to the
16 terms of the GNU General Public License (GPL), incorporated
17 herein by reference. Drivers based on or derived from this
18 code fall under the GPL and must retain the authorship,
19 copyright and license notice. This file is not a complete
20 program and may only be used when the entire operating
21 system is licensed under the GPL.
22
23 This driver is for boards based on the RTL8129 and RTL8139
24 PCI ethernet chips.
25
26 The author may be reached as becker@scyld.com, or C/O Scyld
27 Computing Corporation 410 Severn Ave., Suite 210 Annapolis
28 MD 21403
29
30 Support and updates available at
31 http://www.scyld.com/network/rtl8139.html
32
33 Twister-tuning table provided by Kinston
34 <shangh@realtek.com.tw>.
35
36 -----<snip>-----
37
38 This software may be used and distributed according to the terms
39 of the GNU General Public License, incorporated herein by reference.
40
41 Contributors:
42
43 Donald Becker - he wrote the original driver, kudos to him!
44 (but please don't e-mail him for support, this isn't his driver)
45
46 Tigran Aivazian - bug fixes, skbuff free cleanup
47
48 Martin Mares - suggestions for PCI cleanup
49
50 David S. Miller - PCI DMA and softnet updates
51
52 Ernst Gill - fixes ported from BSD driver
53
54 Daniel Kobras - identified specific locations of
55 posted MMIO write bugginess
56
57 Gerard Sharp - bug fix, testing and feedback
58
59 David Ford - Rx ring wrap fix
60
61 Dan DeMaggio - swapped RTL8139 cards with me, and allowed me
62 to find and fix a crucial bug on older chipsets.
63
64 Donald Becker/Chris Butterworth/Marcus Westergren -
65 Noticed various Rx packet size-related buglets.
66
67 Santiago Garcia Mantinan - testing and feedback
68
69 Jens David - 2.2.x kernel backports
70
71 Martin Dennett - incredibly helpful insight on undocumented
72 features of the 8139 chips
73
74 Jean-Jacques Michel - bug fix
75
76 Tobias Ringström - Rx interrupt status checking suggestion
77
78 Andrew Morton - Clear blocked signals, avoid
79 buffer overrun setting current->comm.
80
81 Kalle Olavi Niemitalo - Wake-on-LAN ioctls
82
83 Robert Kuebel - Save kernel thread from dying on any signal.
84
85 Submitting bug reports:
86
87 "rtl8139-diag -mmmaaavvveefN" output
88 enable RTL8139_DEBUG below, and look at 'dmesg' or kernel log
89
90*/
91
92#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
93
94#define DRV_NAME "8139too"
95#define DRV_VERSION "0.9.28"
96
97
98#include <linux/module.h>
99#include <linux/kernel.h>
100#include <linux/compiler.h>
101#include <linux/pci.h>
102#include <linux/init.h>
103#include <linux/interrupt.h>
104#include <linux/netdevice.h>
105#include <linux/etherdevice.h>
106#include <linux/rtnetlink.h>
107#include <linux/delay.h>
108#include <linux/ethtool.h>
109#include <linux/mii.h>
110#include <linux/completion.h>
111#include <linux/crc32.h>
112#include <linux/io.h>
113#include <linux/uaccess.h>
114#include <linux/gfp.h>
115#include <linux/if_vlan.h>
116#include <asm/irq.h>
117
118#define RTL8139_DRIVER_NAME DRV_NAME " Fast Ethernet driver " DRV_VERSION
119
120/* Default Message level */
121#define RTL8139_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
122 NETIF_MSG_PROBE | \
123 NETIF_MSG_LINK)
124
125
126/* define to 1, 2 or 3 to enable copious debugging info */
127#define RTL8139_DEBUG 0
128
129/* define to 1 to disable lightweight runtime debugging checks */
130#undef RTL8139_NDEBUG
131
132
133#ifdef RTL8139_NDEBUG
134# define assert(expr) do {} while (0)
135#else
136# define assert(expr) \
137 if (unlikely(!(expr))) { \
138 pr_err("Assertion failed! %s,%s,%s,line=%d\n", \
139 #expr, __FILE__, __func__, __LINE__); \
140 }
141#endif
142
143
144/* A few user-configurable values. */
145/* media options */
146#define MAX_UNITS 8
147static int media[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
148static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
149
150/* Whether to use MMIO or PIO. Default to MMIO. */
151#ifdef CONFIG_8139TOO_PIO
152static bool use_io = true;
153#else
154static bool use_io = false;
155#endif
156
157/* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
158 The RTL chips use a 64 element hash table based on the Ethernet CRC. */
159static int multicast_filter_limit = 32;
160
161/* bitmapped message enable number */
162static int debug = -1;
163
164/*
165 * Receive ring size
166 * Warning: 64K ring has hardware issues and may lock up.
167 */
168#if defined(CONFIG_SH_DREAMCAST)
169#define RX_BUF_IDX 0 /* 8K ring */
170#else
171#define RX_BUF_IDX 2 /* 32K ring */
172#endif
173#define RX_BUF_LEN (8192 << RX_BUF_IDX)
174#define RX_BUF_PAD 16
175#define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
176
177#if RX_BUF_LEN == 65536
178#define RX_BUF_TOT_LEN RX_BUF_LEN
179#else
180#define RX_BUF_TOT_LEN (RX_BUF_LEN + RX_BUF_PAD + RX_BUF_WRAP_PAD)
181#endif
182
183/* Number of Tx descriptor registers. */
184#define NUM_TX_DESC 4
185
186/* max supported ethernet frame size -- must be at least (dev->mtu+18+4).*/
187#define MAX_ETH_FRAME_SIZE 1792
188
189/* max supported payload size */
190#define MAX_ETH_DATA_SIZE (MAX_ETH_FRAME_SIZE - VLAN_ETH_HLEN - ETH_FCS_LEN)
191
192/* Size of the Tx bounce buffers -- must be at least (dev->mtu+18+4). */
193#define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
194#define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
195
196/* PCI Tuning Parameters
197 Threshold is bytes transferred to chip before transmission starts. */
198#define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */
199
200/* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
201#define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */
202#define RX_DMA_BURST 7 /* Maximum PCI burst, '6' is 1024 */
203#define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
204#define TX_RETRY 8 /* 0-15. retries = 16 + (TX_RETRY * 16) */
205
206/* Operational parameters that usually are not changed. */
207/* Time in jiffies before concluding the transmitter is hung. */
208#define TX_TIMEOUT (6*HZ)
209
210
211enum {
212 HAS_MII_XCVR = 0x010000,
213 HAS_CHIP_XCVR = 0x020000,
214 HAS_LNK_CHNG = 0x040000,
215};
216
217#define RTL_NUM_STATS 4 /* number of ETHTOOL_GSTATS u64's */
218#define RTL_REGS_VER 1 /* version of reg. data in ETHTOOL_GREGS */
219#define RTL_MIN_IO_SIZE 0x80
220#define RTL8139B_IO_SIZE 256
221
222#define RTL8129_CAPS HAS_MII_XCVR
223#define RTL8139_CAPS (HAS_CHIP_XCVR|HAS_LNK_CHNG)
224
225typedef enum {
226 RTL8139 = 0,
227 RTL8129,
228} board_t;
229
230
231/* indexed by board_t, above */
232static const struct {
233 const char *name;
234 u32 hw_flags;
235} board_info[] = {
236 { "RealTek RTL8139", RTL8139_CAPS },
237 { "RealTek RTL8129", RTL8129_CAPS },
238};
239
240
241static const struct pci_device_id rtl8139_pci_tbl[] = {
242 {0x10ec, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
243 {0x10ec, 0x8138, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
244 {0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
245 {0x1500, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
246 {0x4033, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
247 {0x1186, 0x1300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
248 {0x1186, 0x1340, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
249 {0x13d1, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
250 {0x1259, 0xa117, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
251 {0x1259, 0xa11e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
252 {0x14ea, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
253 {0x14ea, 0xab07, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
254 {0x11db, 0x1234, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
255 {0x1432, 0x9130, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
256 {0x02ac, 0x1012, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
257 {0x018a, 0x0106, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
258 {0x126c, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
259 {0x1743, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
260 {0x021b, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
261 {0x16ec, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
262
263#ifdef CONFIG_SH_SECUREEDGE5410
264 /* Bogus 8139 silicon reports 8129 without external PROM :-( */
265 {0x10ec, 0x8129, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
266#endif
267#ifdef CONFIG_8139TOO_8129
268 {0x10ec, 0x8129, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8129 },
269#endif
270
271 /* some crazy cards report invalid vendor ids like
272 * 0x0001 here. The other ids are valid and constant,
273 * so we simply don't match on the main vendor id.
274 */
275 {PCI_ANY_ID, 0x8139, 0x10ec, 0x8139, 0, 0, RTL8139 },
276 {PCI_ANY_ID, 0x8139, 0x1186, 0x1300, 0, 0, RTL8139 },
277 {PCI_ANY_ID, 0x8139, 0x13d1, 0xab06, 0, 0, RTL8139 },
278
279 {0,}
280};
281MODULE_DEVICE_TABLE (pci, rtl8139_pci_tbl);
282
283static struct {
284 const char str[ETH_GSTRING_LEN];
285} ethtool_stats_keys[] = {
286 { "early_rx" },
287 { "tx_buf_mapped" },
288 { "tx_timeouts" },
289 { "rx_lost_in_ring" },
290};
291
292/* The rest of these values should never change. */
293
294/* Symbolic offsets to registers. */
295enum RTL8139_registers {
296 MAC0 = 0, /* Ethernet hardware address. */
297 MAR0 = 8, /* Multicast filter. */
298 TxStatus0 = 0x10, /* Transmit status (Four 32bit registers). */
299 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
300 RxBuf = 0x30,
301 ChipCmd = 0x37,
302 RxBufPtr = 0x38,
303 RxBufAddr = 0x3A,
304 IntrMask = 0x3C,
305 IntrStatus = 0x3E,
306 TxConfig = 0x40,
307 RxConfig = 0x44,
308 Timer = 0x48, /* A general-purpose counter. */
309 RxMissed = 0x4C, /* 24 bits valid, write clears. */
310 Cfg9346 = 0x50,
311 Config0 = 0x51,
312 Config1 = 0x52,
313 TimerInt = 0x54,
314 MediaStatus = 0x58,
315 Config3 = 0x59,
316 Config4 = 0x5A, /* absent on RTL-8139A */
317 HltClk = 0x5B,
318 MultiIntr = 0x5C,
319 TxSummary = 0x60,
320 BasicModeCtrl = 0x62,
321 BasicModeStatus = 0x64,
322 NWayAdvert = 0x66,
323 NWayLPAR = 0x68,
324 NWayExpansion = 0x6A,
325 /* Undocumented registers, but required for proper operation. */
326 FIFOTMS = 0x70, /* FIFO Control and test. */
327 CSCR = 0x74, /* Chip Status and Configuration Register. */
328 PARA78 = 0x78,
329 FlashReg = 0xD4, /* Communication with Flash ROM, four bytes. */
330 PARA7c = 0x7c, /* Magic transceiver parameter register. */
331 Config5 = 0xD8, /* absent on RTL-8139A */
332};
333
334enum ClearBitMasks {
335 MultiIntrClear = 0xF000,
336 ChipCmdClear = 0xE2,
337 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
338};
339
340enum ChipCmdBits {
341 CmdReset = 0x10,
342 CmdRxEnb = 0x08,
343 CmdTxEnb = 0x04,
344 RxBufEmpty = 0x01,
345};
346
347/* Interrupt register bits, using my own meaningful names. */
348enum IntrStatusBits {
349 PCIErr = 0x8000,
350 PCSTimeout = 0x4000,
351 RxFIFOOver = 0x40,
352 RxUnderrun = 0x20,
353 RxOverflow = 0x10,
354 TxErr = 0x08,
355 TxOK = 0x04,
356 RxErr = 0x02,
357 RxOK = 0x01,
358
359 RxAckBits = RxFIFOOver | RxOverflow | RxOK,
360};
361
362enum TxStatusBits {
363 TxHostOwns = 0x2000,
364 TxUnderrun = 0x4000,
365 TxStatOK = 0x8000,
366 TxOutOfWindow = 0x20000000,
367 TxAborted = 0x40000000,
368 TxCarrierLost = 0x80000000,
369};
370enum RxStatusBits {
371 RxMulticast = 0x8000,
372 RxPhysical = 0x4000,
373 RxBroadcast = 0x2000,
374 RxBadSymbol = 0x0020,
375 RxRunt = 0x0010,
376 RxTooLong = 0x0008,
377 RxCRCErr = 0x0004,
378 RxBadAlign = 0x0002,
379 RxStatusOK = 0x0001,
380};
381
382/* Bits in RxConfig. */
383enum rx_mode_bits {
384 AcceptErr = 0x20,
385 AcceptRunt = 0x10,
386 AcceptBroadcast = 0x08,
387 AcceptMulticast = 0x04,
388 AcceptMyPhys = 0x02,
389 AcceptAllPhys = 0x01,
390};
391
392/* Bits in TxConfig. */
393enum tx_config_bits {
394 /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
395 TxIFGShift = 24,
396 TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
397 TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
398 TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
399 TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
400
401 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
402 TxCRC = (1 << 16), /* DISABLE Tx pkt CRC append */
403 TxClearAbt = (1 << 0), /* Clear abort (WO) */
404 TxDMAShift = 8, /* DMA burst value (0-7) is shifted X many bits */
405 TxRetryShift = 4, /* TXRR value (0-15) is shifted X many bits */
406
407 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
408};
409
410/* Bits in Config1 */
411enum Config1Bits {
412 Cfg1_PM_Enable = 0x01,
413 Cfg1_VPD_Enable = 0x02,
414 Cfg1_PIO = 0x04,
415 Cfg1_MMIO = 0x08,
416 LWAKE = 0x10, /* not on 8139, 8139A */
417 Cfg1_Driver_Load = 0x20,
418 Cfg1_LED0 = 0x40,
419 Cfg1_LED1 = 0x80,
420 SLEEP = (1 << 1), /* only on 8139, 8139A */
421 PWRDN = (1 << 0), /* only on 8139, 8139A */
422};
423
424/* Bits in Config3 */
425enum Config3Bits {
426 Cfg3_FBtBEn = (1 << 0), /* 1 = Fast Back to Back */
427 Cfg3_FuncRegEn = (1 << 1), /* 1 = enable CardBus Function registers */
428 Cfg3_CLKRUN_En = (1 << 2), /* 1 = enable CLKRUN */
429 Cfg3_CardB_En = (1 << 3), /* 1 = enable CardBus registers */
430 Cfg3_LinkUp = (1 << 4), /* 1 = wake up on link up */
431 Cfg3_Magic = (1 << 5), /* 1 = wake up on Magic Packet (tm) */
432 Cfg3_PARM_En = (1 << 6), /* 0 = software can set twister parameters */
433 Cfg3_GNTSel = (1 << 7), /* 1 = delay 1 clock from PCI GNT signal */
434};
435
436/* Bits in Config4 */
437enum Config4Bits {
438 LWPTN = (1 << 2), /* not on 8139, 8139A */
439};
440
441/* Bits in Config5 */
442enum Config5Bits {
443 Cfg5_PME_STS = (1 << 0), /* 1 = PCI reset resets PME_Status */
444 Cfg5_LANWake = (1 << 1), /* 1 = enable LANWake signal */
445 Cfg5_LDPS = (1 << 2), /* 0 = save power when link is down */
446 Cfg5_FIFOAddrPtr= (1 << 3), /* Realtek internal SRAM testing */
447 Cfg5_UWF = (1 << 4), /* 1 = accept unicast wakeup frame */
448 Cfg5_MWF = (1 << 5), /* 1 = accept multicast wakeup frame */
449 Cfg5_BWF = (1 << 6), /* 1 = accept broadcast wakeup frame */
450};
451
452enum RxConfigBits {
453 /* rx fifo threshold */
454 RxCfgFIFOShift = 13,
455 RxCfgFIFONone = (7 << RxCfgFIFOShift),
456
457 /* Max DMA burst */
458 RxCfgDMAShift = 8,
459 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
460
461 /* rx ring buffer length */
462 RxCfgRcv8K = 0,
463 RxCfgRcv16K = (1 << 11),
464 RxCfgRcv32K = (1 << 12),
465 RxCfgRcv64K = (1 << 11) | (1 << 12),
466
467 /* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
468 RxNoWrap = (1 << 7),
469};
470
471/* Twister tuning parameters from RealTek.
472 Completely undocumented, but required to tune bad links on some boards. */
473enum CSCRBits {
474 CSCR_LinkOKBit = 0x0400,
475 CSCR_LinkChangeBit = 0x0800,
476 CSCR_LinkStatusBits = 0x0f000,
477 CSCR_LinkDownOffCmd = 0x003c0,
478 CSCR_LinkDownCmd = 0x0f3c0,
479};
480
481enum Cfg9346Bits {
482 Cfg9346_Lock = 0x00,
483 Cfg9346_Unlock = 0xC0,
484};
485
486typedef enum {
487 CH_8139 = 0,
488 CH_8139_K,
489 CH_8139A,
490 CH_8139A_G,
491 CH_8139B,
492 CH_8130,
493 CH_8139C,
494 CH_8100,
495 CH_8100B_8139D,
496 CH_8101,
497} chip_t;
498
499enum chip_flags {
500 HasHltClk = (1 << 0),
501 HasLWake = (1 << 1),
502};
503
504#define HW_REVID(b30, b29, b28, b27, b26, b23, b22) \
505 (b30<<30 | b29<<29 | b28<<28 | b27<<27 | b26<<26 | b23<<23 | b22<<22)
506#define HW_REVID_MASK HW_REVID(1, 1, 1, 1, 1, 1, 1)
507
508/* directly indexed by chip_t, above */
509static const struct {
510 const char *name;
511 u32 version; /* from RTL8139C/RTL8139D docs */
512 u32 flags;
513} rtl_chip_info[] = {
514 { "RTL-8139",
515 HW_REVID(1, 0, 0, 0, 0, 0, 0),
516 HasHltClk,
517 },
518
519 { "RTL-8139 rev K",
520 HW_REVID(1, 1, 0, 0, 0, 0, 0),
521 HasHltClk,
522 },
523
524 { "RTL-8139A",
525 HW_REVID(1, 1, 1, 0, 0, 0, 0),
526 HasHltClk, /* XXX undocumented? */
527 },
528
529 { "RTL-8139A rev G",
530 HW_REVID(1, 1, 1, 0, 0, 1, 0),
531 HasHltClk, /* XXX undocumented? */
532 },
533
534 { "RTL-8139B",
535 HW_REVID(1, 1, 1, 1, 0, 0, 0),
536 HasLWake,
537 },
538
539 { "RTL-8130",
540 HW_REVID(1, 1, 1, 1, 1, 0, 0),
541 HasLWake,
542 },
543
544 { "RTL-8139C",
545 HW_REVID(1, 1, 1, 0, 1, 0, 0),
546 HasLWake,
547 },
548
549 { "RTL-8100",
550 HW_REVID(1, 1, 1, 1, 0, 1, 0),
551 HasLWake,
552 },
553
554 { "RTL-8100B/8139D",
555 HW_REVID(1, 1, 1, 0, 1, 0, 1),
556 HasHltClk /* XXX undocumented? */
557 | HasLWake,
558 },
559
560 { "RTL-8101",
561 HW_REVID(1, 1, 1, 0, 1, 1, 1),
562 HasLWake,
563 },
564};
565
566struct rtl_extra_stats {
567 unsigned long early_rx;
568 unsigned long tx_buf_mapped;
569 unsigned long tx_timeouts;
570 unsigned long rx_lost_in_ring;
571};
572
573struct rtl8139_stats {
574 u64 packets;
575 u64 bytes;
576 struct u64_stats_sync syncp;
577};
578
579struct rtl8139_private {
580 void __iomem *mmio_addr;
581 int drv_flags;
582 struct pci_dev *pci_dev;
583 u32 msg_enable;
584 struct napi_struct napi;
585 struct net_device *dev;
586
587 unsigned char *rx_ring;
588 unsigned int cur_rx; /* RX buf index of next pkt */
589 struct rtl8139_stats rx_stats;
590 dma_addr_t rx_ring_dma;
591
592 unsigned int tx_flag;
593 unsigned long cur_tx;
594 unsigned long dirty_tx;
595 struct rtl8139_stats tx_stats;
596 unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
597 unsigned char *tx_bufs; /* Tx bounce buffer region. */
598 dma_addr_t tx_bufs_dma;
599
600 signed char phys[4]; /* MII device addresses. */
601
602 /* Twister tune state. */
603 char twistie, twist_row, twist_col;
604
605 unsigned int watchdog_fired : 1;
606 unsigned int default_port : 4; /* Last dev->if_port value. */
607 unsigned int have_thread : 1;
608
609 spinlock_t lock;
610 spinlock_t rx_lock;
611
612 chip_t chipset;
613 u32 rx_config;
614 struct rtl_extra_stats xstats;
615
616 struct delayed_work thread;
617
618 struct mii_if_info mii;
619 unsigned int regs_len;
620 unsigned long fifo_copy_timeout;
621};
622
623MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
624MODULE_DESCRIPTION ("RealTek RTL-8139 Fast Ethernet driver");
625MODULE_LICENSE("GPL");
626MODULE_VERSION(DRV_VERSION);
627
628module_param(use_io, bool, 0);
629MODULE_PARM_DESC(use_io, "Force use of I/O access mode. 0=MMIO 1=PIO");
630module_param(multicast_filter_limit, int, 0);
631module_param_array(media, int, NULL, 0);
632module_param_array(full_duplex, int, NULL, 0);
633module_param(debug, int, 0);
634MODULE_PARM_DESC (debug, "8139too bitmapped message enable number");
635MODULE_PARM_DESC (multicast_filter_limit, "8139too maximum number of filtered multicast addresses");
636MODULE_PARM_DESC (media, "8139too: Bits 4+9: force full duplex, bit 5: 100Mbps");
637MODULE_PARM_DESC (full_duplex, "8139too: Force full duplex for board(s) (1)");
638
639static int read_eeprom (void __iomem *ioaddr, int location, int addr_len);
640static int rtl8139_open (struct net_device *dev);
641static int mdio_read (struct net_device *dev, int phy_id, int location);
642static void mdio_write (struct net_device *dev, int phy_id, int location,
643 int val);
644static void rtl8139_start_thread(struct rtl8139_private *tp);
645static void rtl8139_tx_timeout (struct net_device *dev, unsigned int txqueue);
646static void rtl8139_init_ring (struct net_device *dev);
647static netdev_tx_t rtl8139_start_xmit (struct sk_buff *skb,
648 struct net_device *dev);
649#ifdef CONFIG_NET_POLL_CONTROLLER
650static void rtl8139_poll_controller(struct net_device *dev);
651#endif
652static int rtl8139_set_mac_address(struct net_device *dev, void *p);
653static int rtl8139_poll(struct napi_struct *napi, int budget);
654static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance);
655static int rtl8139_close (struct net_device *dev);
656static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
657static void rtl8139_get_stats64(struct net_device *dev,
658 struct rtnl_link_stats64 *stats);
659static void rtl8139_set_rx_mode (struct net_device *dev);
660static void __set_rx_mode (struct net_device *dev);
661static void rtl8139_hw_start (struct net_device *dev);
662static void rtl8139_thread (struct work_struct *work);
663static void rtl8139_tx_timeout_task(struct work_struct *work);
664static const struct ethtool_ops rtl8139_ethtool_ops;
665
666/* write MMIO register, with flush */
667/* Flush avoids rtl8139 bug w/ posted MMIO writes */
668#define RTL_W8_F(reg, val8) do { iowrite8 ((val8), ioaddr + (reg)); ioread8 (ioaddr + (reg)); } while (0)
669#define RTL_W16_F(reg, val16) do { iowrite16 ((val16), ioaddr + (reg)); ioread16 (ioaddr + (reg)); } while (0)
670#define RTL_W32_F(reg, val32) do { iowrite32 ((val32), ioaddr + (reg)); ioread32 (ioaddr + (reg)); } while (0)
671
672/* write MMIO register */
673#define RTL_W8(reg, val8) iowrite8 ((val8), ioaddr + (reg))
674#define RTL_W16(reg, val16) iowrite16 ((val16), ioaddr + (reg))
675#define RTL_W32(reg, val32) iowrite32 ((val32), ioaddr + (reg))
676
677/* read MMIO register */
678#define RTL_R8(reg) ioread8 (ioaddr + (reg))
679#define RTL_R16(reg) ioread16 (ioaddr + (reg))
680#define RTL_R32(reg) ioread32 (ioaddr + (reg))
681
682
683static const u16 rtl8139_intr_mask =
684 PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
685 TxErr | TxOK | RxErr | RxOK;
686
687static const u16 rtl8139_norx_intr_mask =
688 PCIErr | PCSTimeout | RxUnderrun |
689 TxErr | TxOK | RxErr ;
690
691#if RX_BUF_IDX == 0
692static const unsigned int rtl8139_rx_config =
693 RxCfgRcv8K | RxNoWrap |
694 (RX_FIFO_THRESH << RxCfgFIFOShift) |
695 (RX_DMA_BURST << RxCfgDMAShift);
696#elif RX_BUF_IDX == 1
697static const unsigned int rtl8139_rx_config =
698 RxCfgRcv16K | RxNoWrap |
699 (RX_FIFO_THRESH << RxCfgFIFOShift) |
700 (RX_DMA_BURST << RxCfgDMAShift);
701#elif RX_BUF_IDX == 2
702static const unsigned int rtl8139_rx_config =
703 RxCfgRcv32K | RxNoWrap |
704 (RX_FIFO_THRESH << RxCfgFIFOShift) |
705 (RX_DMA_BURST << RxCfgDMAShift);
706#elif RX_BUF_IDX == 3
707static const unsigned int rtl8139_rx_config =
708 RxCfgRcv64K |
709 (RX_FIFO_THRESH << RxCfgFIFOShift) |
710 (RX_DMA_BURST << RxCfgDMAShift);
711#else
712#error "Invalid configuration for 8139_RXBUF_IDX"
713#endif
714
715static const unsigned int rtl8139_tx_config =
716 TxIFG96 | (TX_DMA_BURST << TxDMAShift) | (TX_RETRY << TxRetryShift);
717
718static void __rtl8139_cleanup_dev (struct net_device *dev)
719{
720 struct rtl8139_private *tp = netdev_priv(dev);
721 struct pci_dev *pdev;
722
723 assert (dev != NULL);
724 assert (tp->pci_dev != NULL);
725 pdev = tp->pci_dev;
726
727 if (tp->mmio_addr)
728 pci_iounmap (pdev, tp->mmio_addr);
729
730 /* it's ok to call this even if we have no regions to free */
731 pci_release_regions (pdev);
732
733 free_netdev(dev);
734}
735
736
737static void rtl8139_chip_reset (void __iomem *ioaddr)
738{
739 int i;
740
741 /* Soft reset the chip. */
742 RTL_W8 (ChipCmd, CmdReset);
743
744 /* Check that the chip has finished the reset. */
745 for (i = 1000; i > 0; i--) {
746 barrier();
747 if ((RTL_R8 (ChipCmd) & CmdReset) == 0)
748 break;
749 udelay (10);
750 }
751}
752
753
754static struct net_device *rtl8139_init_board(struct pci_dev *pdev)
755{
756 struct device *d = &pdev->dev;
757 void __iomem *ioaddr;
758 struct net_device *dev;
759 struct rtl8139_private *tp;
760 u8 tmp8;
761 int rc, disable_dev_on_err = 0;
762 unsigned int i, bar;
763 unsigned long io_len;
764 u32 version;
765 static const struct {
766 unsigned long mask;
767 char *type;
768 } res[] = {
769 { IORESOURCE_IO, "PIO" },
770 { IORESOURCE_MEM, "MMIO" }
771 };
772
773 assert (pdev != NULL);
774
775 /* dev and priv zeroed in alloc_etherdev */
776 dev = alloc_etherdev (sizeof (*tp));
777 if (dev == NULL)
778 return ERR_PTR(-ENOMEM);
779
780 SET_NETDEV_DEV(dev, &pdev->dev);
781
782 tp = netdev_priv(dev);
783 tp->pci_dev = pdev;
784
785 /* enable device (incl. PCI PM wakeup and hotplug setup) */
786 rc = pci_enable_device (pdev);
787 if (rc)
788 goto err_out;
789
790 disable_dev_on_err = 1;
791 rc = pci_request_regions (pdev, DRV_NAME);
792 if (rc)
793 goto err_out;
794
795 pci_set_master (pdev);
796
797 u64_stats_init(&tp->rx_stats.syncp);
798 u64_stats_init(&tp->tx_stats.syncp);
799
800retry:
801 /* PIO bar register comes first. */
802 bar = !use_io;
803
804 io_len = pci_resource_len(pdev, bar);
805
806 dev_dbg(d, "%s region size = 0x%02lX\n", res[bar].type, io_len);
807
808 if (!(pci_resource_flags(pdev, bar) & res[bar].mask)) {
809 dev_err(d, "region #%d not a %s resource, aborting\n", bar,
810 res[bar].type);
811 rc = -ENODEV;
812 goto err_out;
813 }
814 if (io_len < RTL_MIN_IO_SIZE) {
815 dev_err(d, "Invalid PCI %s region size(s), aborting\n",
816 res[bar].type);
817 rc = -ENODEV;
818 goto err_out;
819 }
820
821 ioaddr = pci_iomap(pdev, bar, 0);
822 if (!ioaddr) {
823 dev_err(d, "cannot map %s\n", res[bar].type);
824 if (!use_io) {
825 use_io = true;
826 goto retry;
827 }
828 rc = -ENODEV;
829 goto err_out;
830 }
831 tp->regs_len = io_len;
832 tp->mmio_addr = ioaddr;
833
834 /* Bring old chips out of low-power mode. */
835 RTL_W8 (HltClk, 'R');
836
837 /* check for missing/broken hardware */
838 if (RTL_R32 (TxConfig) == 0xFFFFFFFF) {
839 dev_err(&pdev->dev, "Chip not responding, ignoring board\n");
840 rc = -EIO;
841 goto err_out;
842 }
843
844 /* identify chip attached to board */
845 version = RTL_R32 (TxConfig) & HW_REVID_MASK;
846 for (i = 0; i < ARRAY_SIZE (rtl_chip_info); i++)
847 if (version == rtl_chip_info[i].version) {
848 tp->chipset = i;
849 goto match;
850 }
851
852 /* if unknown chip, assume array element #0, original RTL-8139 in this case */
853 i = 0;
854 dev_dbg(&pdev->dev, "unknown chip version, assuming RTL-8139\n");
855 dev_dbg(&pdev->dev, "TxConfig = 0x%x\n", RTL_R32 (TxConfig));
856 tp->chipset = 0;
857
858match:
859 pr_debug("chipset id (%d) == index %d, '%s'\n",
860 version, i, rtl_chip_info[i].name);
861
862 if (tp->chipset >= CH_8139B) {
863 u8 new_tmp8 = tmp8 = RTL_R8 (Config1);
864 pr_debug("PCI PM wakeup\n");
865 if ((rtl_chip_info[tp->chipset].flags & HasLWake) &&
866 (tmp8 & LWAKE))
867 new_tmp8 &= ~LWAKE;
868 new_tmp8 |= Cfg1_PM_Enable;
869 if (new_tmp8 != tmp8) {
870 RTL_W8 (Cfg9346, Cfg9346_Unlock);
871 RTL_W8 (Config1, tmp8);
872 RTL_W8 (Cfg9346, Cfg9346_Lock);
873 }
874 if (rtl_chip_info[tp->chipset].flags & HasLWake) {
875 tmp8 = RTL_R8 (Config4);
876 if (tmp8 & LWPTN) {
877 RTL_W8 (Cfg9346, Cfg9346_Unlock);
878 RTL_W8 (Config4, tmp8 & ~LWPTN);
879 RTL_W8 (Cfg9346, Cfg9346_Lock);
880 }
881 }
882 } else {
883 pr_debug("Old chip wakeup\n");
884 tmp8 = RTL_R8 (Config1);
885 tmp8 &= ~(SLEEP | PWRDN);
886 RTL_W8 (Config1, tmp8);
887 }
888
889 rtl8139_chip_reset (ioaddr);
890
891 return dev;
892
893err_out:
894 __rtl8139_cleanup_dev (dev);
895 if (disable_dev_on_err)
896 pci_disable_device (pdev);
897 return ERR_PTR(rc);
898}
899
900static int rtl8139_set_features(struct net_device *dev, netdev_features_t features)
901{
902 struct rtl8139_private *tp = netdev_priv(dev);
903 unsigned long flags;
904 netdev_features_t changed = features ^ dev->features;
905 void __iomem *ioaddr = tp->mmio_addr;
906
907 if (!(changed & (NETIF_F_RXALL)))
908 return 0;
909
910 spin_lock_irqsave(&tp->lock, flags);
911
912 if (changed & NETIF_F_RXALL) {
913 int rx_mode = tp->rx_config;
914 if (features & NETIF_F_RXALL)
915 rx_mode |= (AcceptErr | AcceptRunt);
916 else
917 rx_mode &= ~(AcceptErr | AcceptRunt);
918 tp->rx_config = rtl8139_rx_config | rx_mode;
919 RTL_W32_F(RxConfig, tp->rx_config);
920 }
921
922 spin_unlock_irqrestore(&tp->lock, flags);
923
924 return 0;
925}
926
927static const struct net_device_ops rtl8139_netdev_ops = {
928 .ndo_open = rtl8139_open,
929 .ndo_stop = rtl8139_close,
930 .ndo_get_stats64 = rtl8139_get_stats64,
931 .ndo_validate_addr = eth_validate_addr,
932 .ndo_set_mac_address = rtl8139_set_mac_address,
933 .ndo_start_xmit = rtl8139_start_xmit,
934 .ndo_set_rx_mode = rtl8139_set_rx_mode,
935 .ndo_do_ioctl = netdev_ioctl,
936 .ndo_tx_timeout = rtl8139_tx_timeout,
937#ifdef CONFIG_NET_POLL_CONTROLLER
938 .ndo_poll_controller = rtl8139_poll_controller,
939#endif
940 .ndo_set_features = rtl8139_set_features,
941};
942
943static int rtl8139_init_one(struct pci_dev *pdev,
944 const struct pci_device_id *ent)
945{
946 struct net_device *dev = NULL;
947 struct rtl8139_private *tp;
948 int i, addr_len, option;
949 void __iomem *ioaddr;
950 static int board_idx = -1;
951
952 assert (pdev != NULL);
953 assert (ent != NULL);
954
955 board_idx++;
956
957 /* when we're built into the kernel, the driver version message
958 * is only printed if at least one 8139 board has been found
959 */
960#ifndef MODULE
961 {
962 static int printed_version;
963 if (!printed_version++)
964 pr_info(RTL8139_DRIVER_NAME "\n");
965 }
966#endif
967
968 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
969 pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pdev->revision >= 0x20) {
970 dev_info(&pdev->dev,
971 "This (id %04x:%04x rev %02x) is an enhanced 8139C+ chip, use 8139cp\n",
972 pdev->vendor, pdev->device, pdev->revision);
973 return -ENODEV;
974 }
975
976 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
977 pdev->device == PCI_DEVICE_ID_REALTEK_8139 &&
978 pdev->subsystem_vendor == PCI_VENDOR_ID_ATHEROS &&
979 pdev->subsystem_device == PCI_DEVICE_ID_REALTEK_8139) {
980 pr_info("OQO Model 2 detected. Forcing PIO\n");
981 use_io = true;
982 }
983
984 dev = rtl8139_init_board (pdev);
985 if (IS_ERR(dev))
986 return PTR_ERR(dev);
987
988 assert (dev != NULL);
989 tp = netdev_priv(dev);
990 tp->dev = dev;
991
992 ioaddr = tp->mmio_addr;
993 assert (ioaddr != NULL);
994
995 addr_len = read_eeprom (ioaddr, 0, 8) == 0x8129 ? 8 : 6;
996 for (i = 0; i < 3; i++)
997 ((__le16 *) (dev->dev_addr))[i] =
998 cpu_to_le16(read_eeprom (ioaddr, i + 7, addr_len));
999
1000 /* The Rtl8139-specific entries in the device structure. */
1001 dev->netdev_ops = &rtl8139_netdev_ops;
1002 dev->ethtool_ops = &rtl8139_ethtool_ops;
1003 dev->watchdog_timeo = TX_TIMEOUT;
1004 netif_napi_add(dev, &tp->napi, rtl8139_poll, 64);
1005
1006 /* note: the hardware is not capable of sg/csum/highdma, however
1007 * through the use of skb_copy_and_csum_dev we enable these
1008 * features
1009 */
1010 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
1011 dev->vlan_features = dev->features;
1012
1013 dev->hw_features |= NETIF_F_RXALL;
1014 dev->hw_features |= NETIF_F_RXFCS;
1015
1016 /* MTU range: 68 - 1770 */
1017 dev->min_mtu = ETH_MIN_MTU;
1018 dev->max_mtu = MAX_ETH_DATA_SIZE;
1019
1020 /* tp zeroed and aligned in alloc_etherdev */
1021 tp = netdev_priv(dev);
1022
1023 /* note: tp->chipset set in rtl8139_init_board */
1024 tp->drv_flags = board_info[ent->driver_data].hw_flags;
1025 tp->mmio_addr = ioaddr;
1026 tp->msg_enable =
1027 (debug < 0 ? RTL8139_DEF_MSG_ENABLE : ((1 << debug) - 1));
1028 spin_lock_init (&tp->lock);
1029 spin_lock_init (&tp->rx_lock);
1030 INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
1031 tp->mii.dev = dev;
1032 tp->mii.mdio_read = mdio_read;
1033 tp->mii.mdio_write = mdio_write;
1034 tp->mii.phy_id_mask = 0x3f;
1035 tp->mii.reg_num_mask = 0x1f;
1036
1037 /* dev is fully set up and ready to use now */
1038 pr_debug("about to register device named %s (%p)...\n",
1039 dev->name, dev);
1040 i = register_netdev (dev);
1041 if (i) goto err_out;
1042
1043 pci_set_drvdata (pdev, dev);
1044
1045 netdev_info(dev, "%s at 0x%p, %pM, IRQ %d\n",
1046 board_info[ent->driver_data].name,
1047 ioaddr, dev->dev_addr, pdev->irq);
1048
1049 netdev_dbg(dev, "Identified 8139 chip type '%s'\n",
1050 rtl_chip_info[tp->chipset].name);
1051
1052 /* Find the connected MII xcvrs.
1053 Doing this in open() would allow detecting external xcvrs later, but
1054 takes too much time. */
1055#ifdef CONFIG_8139TOO_8129
1056 if (tp->drv_flags & HAS_MII_XCVR) {
1057 int phy, phy_idx = 0;
1058 for (phy = 0; phy < 32 && phy_idx < sizeof(tp->phys); phy++) {
1059 int mii_status = mdio_read(dev, phy, 1);
1060 if (mii_status != 0xffff && mii_status != 0x0000) {
1061 u16 advertising = mdio_read(dev, phy, 4);
1062 tp->phys[phy_idx++] = phy;
1063 netdev_info(dev, "MII transceiver %d status 0x%04x advertising %04x\n",
1064 phy, mii_status, advertising);
1065 }
1066 }
1067 if (phy_idx == 0) {
1068 netdev_info(dev, "No MII transceivers found! Assuming SYM transceiver\n");
1069 tp->phys[0] = 32;
1070 }
1071 } else
1072#endif
1073 tp->phys[0] = 32;
1074 tp->mii.phy_id = tp->phys[0];
1075
1076 /* The lower four bits are the media type. */
1077 option = (board_idx >= MAX_UNITS) ? 0 : media[board_idx];
1078 if (option > 0) {
1079 tp->mii.full_duplex = (option & 0x210) ? 1 : 0;
1080 tp->default_port = option & 0xFF;
1081 if (tp->default_port)
1082 tp->mii.force_media = 1;
1083 }
1084 if (board_idx < MAX_UNITS && full_duplex[board_idx] > 0)
1085 tp->mii.full_duplex = full_duplex[board_idx];
1086 if (tp->mii.full_duplex) {
1087 netdev_info(dev, "Media type forced to Full Duplex\n");
1088 /* Changing the MII-advertised media because might prevent
1089 re-connection. */
1090 tp->mii.force_media = 1;
1091 }
1092 if (tp->default_port) {
1093 netdev_info(dev, " Forcing %dMbps %s-duplex operation\n",
1094 (option & 0x20 ? 100 : 10),
1095 (option & 0x10 ? "full" : "half"));
1096 mdio_write(dev, tp->phys[0], 0,
1097 ((option & 0x20) ? 0x2000 : 0) | /* 100Mbps? */
1098 ((option & 0x10) ? 0x0100 : 0)); /* Full duplex? */
1099 }
1100
1101 /* Put the chip into low-power mode. */
1102 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1103 RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
1104
1105 return 0;
1106
1107err_out:
1108 __rtl8139_cleanup_dev (dev);
1109 pci_disable_device (pdev);
1110 return i;
1111}
1112
1113
1114static void rtl8139_remove_one(struct pci_dev *pdev)
1115{
1116 struct net_device *dev = pci_get_drvdata (pdev);
1117 struct rtl8139_private *tp = netdev_priv(dev);
1118
1119 assert (dev != NULL);
1120
1121 cancel_delayed_work_sync(&tp->thread);
1122
1123 unregister_netdev (dev);
1124
1125 __rtl8139_cleanup_dev (dev);
1126 pci_disable_device (pdev);
1127}
1128
1129
1130/* Serial EEPROM section. */
1131
1132/* EEPROM_Ctrl bits. */
1133#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
1134#define EE_CS 0x08 /* EEPROM chip select. */
1135#define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
1136#define EE_WRITE_0 0x00
1137#define EE_WRITE_1 0x02
1138#define EE_DATA_READ 0x01 /* EEPROM chip data out. */
1139#define EE_ENB (0x80 | EE_CS)
1140
1141/* Delay between EEPROM clock transitions.
1142 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1143 */
1144
1145#define eeprom_delay() (void)RTL_R8(Cfg9346)
1146
1147/* The EEPROM commands include the alway-set leading bit. */
1148#define EE_WRITE_CMD (5)
1149#define EE_READ_CMD (6)
1150#define EE_ERASE_CMD (7)
1151
1152static int read_eeprom(void __iomem *ioaddr, int location, int addr_len)
1153{
1154 int i;
1155 unsigned retval = 0;
1156 int read_cmd = location | (EE_READ_CMD << addr_len);
1157
1158 RTL_W8 (Cfg9346, EE_ENB & ~EE_CS);
1159 RTL_W8 (Cfg9346, EE_ENB);
1160 eeprom_delay ();
1161
1162 /* Shift the read command bits out. */
1163 for (i = 4 + addr_len; i >= 0; i--) {
1164 int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1165 RTL_W8 (Cfg9346, EE_ENB | dataval);
1166 eeprom_delay ();
1167 RTL_W8 (Cfg9346, EE_ENB | dataval | EE_SHIFT_CLK);
1168 eeprom_delay ();
1169 }
1170 RTL_W8 (Cfg9346, EE_ENB);
1171 eeprom_delay ();
1172
1173 for (i = 16; i > 0; i--) {
1174 RTL_W8 (Cfg9346, EE_ENB | EE_SHIFT_CLK);
1175 eeprom_delay ();
1176 retval =
1177 (retval << 1) | ((RTL_R8 (Cfg9346) & EE_DATA_READ) ? 1 :
1178 0);
1179 RTL_W8 (Cfg9346, EE_ENB);
1180 eeprom_delay ();
1181 }
1182
1183 /* Terminate the EEPROM access. */
1184 RTL_W8(Cfg9346, 0);
1185 eeprom_delay ();
1186
1187 return retval;
1188}
1189
1190/* MII serial management: mostly bogus for now. */
1191/* Read and write the MII management registers using software-generated
1192 serial MDIO protocol.
1193 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
1194 met by back-to-back PCI I/O cycles, but we insert a delay to avoid
1195 "overclocking" issues. */
1196#define MDIO_DIR 0x80
1197#define MDIO_DATA_OUT 0x04
1198#define MDIO_DATA_IN 0x02
1199#define MDIO_CLK 0x01
1200#define MDIO_WRITE0 (MDIO_DIR)
1201#define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
1202
1203#define mdio_delay() RTL_R8(Config4)
1204
1205
1206static const char mii_2_8139_map[8] = {
1207 BasicModeCtrl,
1208 BasicModeStatus,
1209 0,
1210 0,
1211 NWayAdvert,
1212 NWayLPAR,
1213 NWayExpansion,
1214 0
1215};
1216
1217
1218#ifdef CONFIG_8139TOO_8129
1219/* Syncronize the MII management interface by shifting 32 one bits out. */
1220static void mdio_sync (void __iomem *ioaddr)
1221{
1222 int i;
1223
1224 for (i = 32; i >= 0; i--) {
1225 RTL_W8 (Config4, MDIO_WRITE1);
1226 mdio_delay ();
1227 RTL_W8 (Config4, MDIO_WRITE1 | MDIO_CLK);
1228 mdio_delay ();
1229 }
1230}
1231#endif
1232
1233static int mdio_read (struct net_device *dev, int phy_id, int location)
1234{
1235 struct rtl8139_private *tp = netdev_priv(dev);
1236 int retval = 0;
1237#ifdef CONFIG_8139TOO_8129
1238 void __iomem *ioaddr = tp->mmio_addr;
1239 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
1240 int i;
1241#endif
1242
1243 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1244 void __iomem *ioaddr = tp->mmio_addr;
1245 return location < 8 && mii_2_8139_map[location] ?
1246 RTL_R16 (mii_2_8139_map[location]) : 0;
1247 }
1248
1249#ifdef CONFIG_8139TOO_8129
1250 mdio_sync (ioaddr);
1251 /* Shift the read command bits out. */
1252 for (i = 15; i >= 0; i--) {
1253 int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0;
1254
1255 RTL_W8 (Config4, MDIO_DIR | dataval);
1256 mdio_delay ();
1257 RTL_W8 (Config4, MDIO_DIR | dataval | MDIO_CLK);
1258 mdio_delay ();
1259 }
1260
1261 /* Read the two transition, 16 data, and wire-idle bits. */
1262 for (i = 19; i > 0; i--) {
1263 RTL_W8 (Config4, 0);
1264 mdio_delay ();
1265 retval = (retval << 1) | ((RTL_R8 (Config4) & MDIO_DATA_IN) ? 1 : 0);
1266 RTL_W8 (Config4, MDIO_CLK);
1267 mdio_delay ();
1268 }
1269#endif
1270
1271 return (retval >> 1) & 0xffff;
1272}
1273
1274
1275static void mdio_write (struct net_device *dev, int phy_id, int location,
1276 int value)
1277{
1278 struct rtl8139_private *tp = netdev_priv(dev);
1279#ifdef CONFIG_8139TOO_8129
1280 void __iomem *ioaddr = tp->mmio_addr;
1281 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location << 18) | value;
1282 int i;
1283#endif
1284
1285 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1286 void __iomem *ioaddr = tp->mmio_addr;
1287 if (location == 0) {
1288 RTL_W8 (Cfg9346, Cfg9346_Unlock);
1289 RTL_W16 (BasicModeCtrl, value);
1290 RTL_W8 (Cfg9346, Cfg9346_Lock);
1291 } else if (location < 8 && mii_2_8139_map[location])
1292 RTL_W16 (mii_2_8139_map[location], value);
1293 return;
1294 }
1295
1296#ifdef CONFIG_8139TOO_8129
1297 mdio_sync (ioaddr);
1298
1299 /* Shift the command bits out. */
1300 for (i = 31; i >= 0; i--) {
1301 int dataval =
1302 (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
1303 RTL_W8 (Config4, dataval);
1304 mdio_delay ();
1305 RTL_W8 (Config4, dataval | MDIO_CLK);
1306 mdio_delay ();
1307 }
1308 /* Clear out extra bits. */
1309 for (i = 2; i > 0; i--) {
1310 RTL_W8 (Config4, 0);
1311 mdio_delay ();
1312 RTL_W8 (Config4, MDIO_CLK);
1313 mdio_delay ();
1314 }
1315#endif
1316}
1317
1318
1319static int rtl8139_open (struct net_device *dev)
1320{
1321 struct rtl8139_private *tp = netdev_priv(dev);
1322 void __iomem *ioaddr = tp->mmio_addr;
1323 const int irq = tp->pci_dev->irq;
1324 int retval;
1325
1326 retval = request_irq(irq, rtl8139_interrupt, IRQF_SHARED, dev->name, dev);
1327 if (retval)
1328 return retval;
1329
1330 tp->tx_bufs = dma_alloc_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
1331 &tp->tx_bufs_dma, GFP_KERNEL);
1332 tp->rx_ring = dma_alloc_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
1333 &tp->rx_ring_dma, GFP_KERNEL);
1334 if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
1335 free_irq(irq, dev);
1336
1337 if (tp->tx_bufs)
1338 dma_free_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
1339 tp->tx_bufs, tp->tx_bufs_dma);
1340 if (tp->rx_ring)
1341 dma_free_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
1342 tp->rx_ring, tp->rx_ring_dma);
1343
1344 return -ENOMEM;
1345
1346 }
1347
1348 napi_enable(&tp->napi);
1349
1350 tp->mii.full_duplex = tp->mii.force_media;
1351 tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
1352
1353 rtl8139_init_ring (dev);
1354 rtl8139_hw_start (dev);
1355 netif_start_queue (dev);
1356
1357 netif_dbg(tp, ifup, dev,
1358 "%s() ioaddr %#llx IRQ %d GP Pins %02x %s-duplex\n",
1359 __func__,
1360 (unsigned long long)pci_resource_start (tp->pci_dev, 1),
1361 irq, RTL_R8 (MediaStatus),
1362 tp->mii.full_duplex ? "full" : "half");
1363
1364 rtl8139_start_thread(tp);
1365
1366 return 0;
1367}
1368
1369
1370static void rtl_check_media (struct net_device *dev, unsigned int init_media)
1371{
1372 struct rtl8139_private *tp = netdev_priv(dev);
1373
1374 if (tp->phys[0] >= 0) {
1375 mii_check_media(&tp->mii, netif_msg_link(tp), init_media);
1376 }
1377}
1378
1379/* Start the hardware at open or resume. */
1380static void rtl8139_hw_start (struct net_device *dev)
1381{
1382 struct rtl8139_private *tp = netdev_priv(dev);
1383 void __iomem *ioaddr = tp->mmio_addr;
1384 u32 i;
1385 u8 tmp;
1386
1387 /* Bring old chips out of low-power mode. */
1388 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1389 RTL_W8 (HltClk, 'R');
1390
1391 rtl8139_chip_reset (ioaddr);
1392
1393 /* unlock Config[01234] and BMCR register writes */
1394 RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1395 /* Restore our idea of the MAC address. */
1396 RTL_W32_F (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1397 RTL_W32_F (MAC0 + 4, le16_to_cpu (*(__le16 *) (dev->dev_addr + 4)));
1398
1399 tp->cur_rx = 0;
1400
1401 /* init Rx ring buffer DMA address */
1402 RTL_W32_F (RxBuf, tp->rx_ring_dma);
1403
1404 /* Must enable Tx/Rx before setting transfer thresholds! */
1405 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1406
1407 tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1408 RTL_W32 (RxConfig, tp->rx_config);
1409 RTL_W32 (TxConfig, rtl8139_tx_config);
1410
1411 rtl_check_media (dev, 1);
1412
1413 if (tp->chipset >= CH_8139B) {
1414 /* Disable magic packet scanning, which is enabled
1415 * when PM is enabled in Config1. It can be reenabled
1416 * via ETHTOOL_SWOL if desired. */
1417 RTL_W8 (Config3, RTL_R8 (Config3) & ~Cfg3_Magic);
1418 }
1419
1420 netdev_dbg(dev, "init buffer addresses\n");
1421
1422 /* Lock Config[01234] and BMCR register writes */
1423 RTL_W8 (Cfg9346, Cfg9346_Lock);
1424
1425 /* init Tx buffer DMA addresses */
1426 for (i = 0; i < NUM_TX_DESC; i++)
1427 RTL_W32_F (TxAddr0 + (i * 4), tp->tx_bufs_dma + (tp->tx_buf[i] - tp->tx_bufs));
1428
1429 RTL_W32 (RxMissed, 0);
1430
1431 rtl8139_set_rx_mode (dev);
1432
1433 /* no early-rx interrupts */
1434 RTL_W16 (MultiIntr, RTL_R16 (MultiIntr) & MultiIntrClear);
1435
1436 /* make sure RxTx has started */
1437 tmp = RTL_R8 (ChipCmd);
1438 if ((!(tmp & CmdRxEnb)) || (!(tmp & CmdTxEnb)))
1439 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1440
1441 /* Enable all known interrupts by setting the interrupt mask. */
1442 RTL_W16 (IntrMask, rtl8139_intr_mask);
1443}
1444
1445
1446/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1447static void rtl8139_init_ring (struct net_device *dev)
1448{
1449 struct rtl8139_private *tp = netdev_priv(dev);
1450 int i;
1451
1452 tp->cur_rx = 0;
1453 tp->cur_tx = 0;
1454 tp->dirty_tx = 0;
1455
1456 for (i = 0; i < NUM_TX_DESC; i++)
1457 tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
1458}
1459
1460
1461/* This must be global for CONFIG_8139TOO_TUNE_TWISTER case */
1462static int next_tick = 3 * HZ;
1463
1464#ifndef CONFIG_8139TOO_TUNE_TWISTER
1465static inline void rtl8139_tune_twister (struct net_device *dev,
1466 struct rtl8139_private *tp) {}
1467#else
1468enum TwisterParamVals {
1469 PARA78_default = 0x78fa8388,
1470 PARA7c_default = 0xcb38de43, /* param[0][3] */
1471 PARA7c_xxx = 0xcb38de43,
1472};
1473
1474static const unsigned long param[4][4] = {
1475 {0xcb39de43, 0xcb39ce43, 0xfb38de03, 0xcb38de43},
1476 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1477 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1478 {0xbb39de43, 0xbb39ce43, 0xbb39ce83, 0xbb39ce83}
1479};
1480
1481static void rtl8139_tune_twister (struct net_device *dev,
1482 struct rtl8139_private *tp)
1483{
1484 int linkcase;
1485 void __iomem *ioaddr = tp->mmio_addr;
1486
1487 /* This is a complicated state machine to configure the "twister" for
1488 impedance/echos based on the cable length.
1489 All of this is magic and undocumented.
1490 */
1491 switch (tp->twistie) {
1492 case 1:
1493 if (RTL_R16 (CSCR) & CSCR_LinkOKBit) {
1494 /* We have link beat, let us tune the twister. */
1495 RTL_W16 (CSCR, CSCR_LinkDownOffCmd);
1496 tp->twistie = 2; /* Change to state 2. */
1497 next_tick = HZ / 10;
1498 } else {
1499 /* Just put in some reasonable defaults for when beat returns. */
1500 RTL_W16 (CSCR, CSCR_LinkDownCmd);
1501 RTL_W32 (FIFOTMS, 0x20); /* Turn on cable test mode. */
1502 RTL_W32 (PARA78, PARA78_default);
1503 RTL_W32 (PARA7c, PARA7c_default);
1504 tp->twistie = 0; /* Bail from future actions. */
1505 }
1506 break;
1507 case 2:
1508 /* Read how long it took to hear the echo. */
1509 linkcase = RTL_R16 (CSCR) & CSCR_LinkStatusBits;
1510 if (linkcase == 0x7000)
1511 tp->twist_row = 3;
1512 else if (linkcase == 0x3000)
1513 tp->twist_row = 2;
1514 else if (linkcase == 0x1000)
1515 tp->twist_row = 1;
1516 else
1517 tp->twist_row = 0;
1518 tp->twist_col = 0;
1519 tp->twistie = 3; /* Change to state 2. */
1520 next_tick = HZ / 10;
1521 break;
1522 case 3:
1523 /* Put out four tuning parameters, one per 100msec. */
1524 if (tp->twist_col == 0)
1525 RTL_W16 (FIFOTMS, 0);
1526 RTL_W32 (PARA7c, param[(int) tp->twist_row]
1527 [(int) tp->twist_col]);
1528 next_tick = HZ / 10;
1529 if (++tp->twist_col >= 4) {
1530 /* For short cables we are done.
1531 For long cables (row == 3) check for mistune. */
1532 tp->twistie =
1533 (tp->twist_row == 3) ? 4 : 0;
1534 }
1535 break;
1536 case 4:
1537 /* Special case for long cables: check for mistune. */
1538 if ((RTL_R16 (CSCR) &
1539 CSCR_LinkStatusBits) == 0x7000) {
1540 tp->twistie = 0;
1541 break;
1542 } else {
1543 RTL_W32 (PARA7c, 0xfb38de03);
1544 tp->twistie = 5;
1545 next_tick = HZ / 10;
1546 }
1547 break;
1548 case 5:
1549 /* Retune for shorter cable (column 2). */
1550 RTL_W32 (FIFOTMS, 0x20);
1551 RTL_W32 (PARA78, PARA78_default);
1552 RTL_W32 (PARA7c, PARA7c_default);
1553 RTL_W32 (FIFOTMS, 0x00);
1554 tp->twist_row = 2;
1555 tp->twist_col = 0;
1556 tp->twistie = 3;
1557 next_tick = HZ / 10;
1558 break;
1559
1560 default:
1561 /* do nothing */
1562 break;
1563 }
1564}
1565#endif /* CONFIG_8139TOO_TUNE_TWISTER */
1566
1567static inline void rtl8139_thread_iter (struct net_device *dev,
1568 struct rtl8139_private *tp,
1569 void __iomem *ioaddr)
1570{
1571 int mii_lpa;
1572
1573 mii_lpa = mdio_read (dev, tp->phys[0], MII_LPA);
1574
1575 if (!tp->mii.force_media && mii_lpa != 0xffff) {
1576 int duplex = ((mii_lpa & LPA_100FULL) ||
1577 (mii_lpa & 0x01C0) == 0x0040);
1578 if (tp->mii.full_duplex != duplex) {
1579 tp->mii.full_duplex = duplex;
1580
1581 if (mii_lpa) {
1582 netdev_info(dev, "Setting %s-duplex based on MII #%d link partner ability of %04x\n",
1583 tp->mii.full_duplex ? "full" : "half",
1584 tp->phys[0], mii_lpa);
1585 } else {
1586 netdev_info(dev, "media is unconnected, link down, or incompatible connection\n");
1587 }
1588#if 0
1589 RTL_W8 (Cfg9346, Cfg9346_Unlock);
1590 RTL_W8 (Config1, tp->mii.full_duplex ? 0x60 : 0x20);
1591 RTL_W8 (Cfg9346, Cfg9346_Lock);
1592#endif
1593 }
1594 }
1595
1596 next_tick = HZ * 60;
1597
1598 rtl8139_tune_twister (dev, tp);
1599
1600 netdev_dbg(dev, "Media selection tick, Link partner %04x\n",
1601 RTL_R16(NWayLPAR));
1602 netdev_dbg(dev, "Other registers are IntMask %04x IntStatus %04x\n",
1603 RTL_R16(IntrMask), RTL_R16(IntrStatus));
1604 netdev_dbg(dev, "Chip config %02x %02x\n",
1605 RTL_R8(Config0), RTL_R8(Config1));
1606}
1607
1608static void rtl8139_thread (struct work_struct *work)
1609{
1610 struct rtl8139_private *tp =
1611 container_of(work, struct rtl8139_private, thread.work);
1612 struct net_device *dev = tp->mii.dev;
1613 unsigned long thr_delay = next_tick;
1614
1615 rtnl_lock();
1616
1617 if (!netif_running(dev))
1618 goto out_unlock;
1619
1620 if (tp->watchdog_fired) {
1621 tp->watchdog_fired = 0;
1622 rtl8139_tx_timeout_task(work);
1623 } else
1624 rtl8139_thread_iter(dev, tp, tp->mmio_addr);
1625
1626 if (tp->have_thread)
1627 schedule_delayed_work(&tp->thread, thr_delay);
1628out_unlock:
1629 rtnl_unlock ();
1630}
1631
1632static void rtl8139_start_thread(struct rtl8139_private *tp)
1633{
1634 tp->twistie = 0;
1635 if (tp->chipset == CH_8139_K)
1636 tp->twistie = 1;
1637 else if (tp->drv_flags & HAS_LNK_CHNG)
1638 return;
1639
1640 tp->have_thread = 1;
1641 tp->watchdog_fired = 0;
1642
1643 schedule_delayed_work(&tp->thread, next_tick);
1644}
1645
1646static inline void rtl8139_tx_clear (struct rtl8139_private *tp)
1647{
1648 tp->cur_tx = 0;
1649 tp->dirty_tx = 0;
1650
1651 /* XXX account for unsent Tx packets in tp->stats.tx_dropped */
1652}
1653
1654static void rtl8139_tx_timeout_task (struct work_struct *work)
1655{
1656 struct rtl8139_private *tp =
1657 container_of(work, struct rtl8139_private, thread.work);
1658 struct net_device *dev = tp->mii.dev;
1659 void __iomem *ioaddr = tp->mmio_addr;
1660 int i;
1661 u8 tmp8;
1662
1663 napi_disable(&tp->napi);
1664 netif_stop_queue(dev);
1665 synchronize_rcu();
1666
1667 netdev_dbg(dev, "Transmit timeout, status %02x %04x %04x media %02x\n",
1668 RTL_R8(ChipCmd), RTL_R16(IntrStatus),
1669 RTL_R16(IntrMask), RTL_R8(MediaStatus));
1670 /* Emit info to figure out what went wrong. */
1671 netdev_dbg(dev, "Tx queue start entry %ld dirty entry %ld\n",
1672 tp->cur_tx, tp->dirty_tx);
1673 for (i = 0; i < NUM_TX_DESC; i++)
1674 netdev_dbg(dev, "Tx descriptor %d is %08x%s\n",
1675 i, RTL_R32(TxStatus0 + (i * 4)),
1676 i == tp->dirty_tx % NUM_TX_DESC ?
1677 " (queue head)" : "");
1678
1679 tp->xstats.tx_timeouts++;
1680
1681 /* disable Tx ASAP, if not already */
1682 tmp8 = RTL_R8 (ChipCmd);
1683 if (tmp8 & CmdTxEnb)
1684 RTL_W8 (ChipCmd, CmdRxEnb);
1685
1686 spin_lock_bh(&tp->rx_lock);
1687 /* Disable interrupts by clearing the interrupt mask. */
1688 RTL_W16 (IntrMask, 0x0000);
1689
1690 /* Stop a shared interrupt from scavenging while we are. */
1691 spin_lock_irq(&tp->lock);
1692 rtl8139_tx_clear (tp);
1693 spin_unlock_irq(&tp->lock);
1694
1695 /* ...and finally, reset everything */
1696 napi_enable(&tp->napi);
1697 rtl8139_hw_start(dev);
1698 netif_wake_queue(dev);
1699
1700 spin_unlock_bh(&tp->rx_lock);
1701}
1702
1703static void rtl8139_tx_timeout(struct net_device *dev, unsigned int txqueue)
1704{
1705 struct rtl8139_private *tp = netdev_priv(dev);
1706
1707 tp->watchdog_fired = 1;
1708 if (!tp->have_thread) {
1709 INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
1710 schedule_delayed_work(&tp->thread, next_tick);
1711 }
1712}
1713
1714static netdev_tx_t rtl8139_start_xmit (struct sk_buff *skb,
1715 struct net_device *dev)
1716{
1717 struct rtl8139_private *tp = netdev_priv(dev);
1718 void __iomem *ioaddr = tp->mmio_addr;
1719 unsigned int entry;
1720 unsigned int len = skb->len;
1721 unsigned long flags;
1722
1723 /* Calculate the next Tx descriptor entry. */
1724 entry = tp->cur_tx % NUM_TX_DESC;
1725
1726 /* Note: the chip doesn't have auto-pad! */
1727 if (likely(len < TX_BUF_SIZE)) {
1728 if (len < ETH_ZLEN)
1729 memset(tp->tx_buf[entry], 0, ETH_ZLEN);
1730 skb_copy_and_csum_dev(skb, tp->tx_buf[entry]);
1731 dev_kfree_skb_any(skb);
1732 } else {
1733 dev_kfree_skb_any(skb);
1734 dev->stats.tx_dropped++;
1735 return NETDEV_TX_OK;
1736 }
1737
1738 spin_lock_irqsave(&tp->lock, flags);
1739 /*
1740 * Writing to TxStatus triggers a DMA transfer of the data
1741 * copied to tp->tx_buf[entry] above. Use a memory barrier
1742 * to make sure that the device sees the updated data.
1743 */
1744 wmb();
1745 RTL_W32_F (TxStatus0 + (entry * sizeof (u32)),
1746 tp->tx_flag | max(len, (unsigned int)ETH_ZLEN));
1747
1748 tp->cur_tx++;
1749
1750 if ((tp->cur_tx - NUM_TX_DESC) == tp->dirty_tx)
1751 netif_stop_queue (dev);
1752 spin_unlock_irqrestore(&tp->lock, flags);
1753
1754 netif_dbg(tp, tx_queued, dev, "Queued Tx packet size %u to slot %d\n",
1755 len, entry);
1756
1757 return NETDEV_TX_OK;
1758}
1759
1760
1761static void rtl8139_tx_interrupt (struct net_device *dev,
1762 struct rtl8139_private *tp,
1763 void __iomem *ioaddr)
1764{
1765 unsigned long dirty_tx, tx_left;
1766
1767 assert (dev != NULL);
1768 assert (ioaddr != NULL);
1769
1770 dirty_tx = tp->dirty_tx;
1771 tx_left = tp->cur_tx - dirty_tx;
1772 while (tx_left > 0) {
1773 int entry = dirty_tx % NUM_TX_DESC;
1774 int txstatus;
1775
1776 txstatus = RTL_R32 (TxStatus0 + (entry * sizeof (u32)));
1777
1778 if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
1779 break; /* It still hasn't been Txed */
1780
1781 /* Note: TxCarrierLost is always asserted at 100mbps. */
1782 if (txstatus & (TxOutOfWindow | TxAborted)) {
1783 /* There was an major error, log it. */
1784 netif_dbg(tp, tx_err, dev, "Transmit error, Tx status %08x\n",
1785 txstatus);
1786 dev->stats.tx_errors++;
1787 if (txstatus & TxAborted) {
1788 dev->stats.tx_aborted_errors++;
1789 RTL_W32 (TxConfig, TxClearAbt);
1790 RTL_W16 (IntrStatus, TxErr);
1791 wmb();
1792 }
1793 if (txstatus & TxCarrierLost)
1794 dev->stats.tx_carrier_errors++;
1795 if (txstatus & TxOutOfWindow)
1796 dev->stats.tx_window_errors++;
1797 } else {
1798 if (txstatus & TxUnderrun) {
1799 /* Add 64 to the Tx FIFO threshold. */
1800 if (tp->tx_flag < 0x00300000)
1801 tp->tx_flag += 0x00020000;
1802 dev->stats.tx_fifo_errors++;
1803 }
1804 dev->stats.collisions += (txstatus >> 24) & 15;
1805 u64_stats_update_begin(&tp->tx_stats.syncp);
1806 tp->tx_stats.packets++;
1807 tp->tx_stats.bytes += txstatus & 0x7ff;
1808 u64_stats_update_end(&tp->tx_stats.syncp);
1809 }
1810
1811 dirty_tx++;
1812 tx_left--;
1813 }
1814
1815#ifndef RTL8139_NDEBUG
1816 if (tp->cur_tx - dirty_tx > NUM_TX_DESC) {
1817 netdev_err(dev, "Out-of-sync dirty pointer, %ld vs. %ld\n",
1818 dirty_tx, tp->cur_tx);
1819 dirty_tx += NUM_TX_DESC;
1820 }
1821#endif /* RTL8139_NDEBUG */
1822
1823 /* only wake the queue if we did work, and the queue is stopped */
1824 if (tp->dirty_tx != dirty_tx) {
1825 tp->dirty_tx = dirty_tx;
1826 mb();
1827 netif_wake_queue (dev);
1828 }
1829}
1830
1831
1832/* TODO: clean this up! Rx reset need not be this intensive */
1833static void rtl8139_rx_err (u32 rx_status, struct net_device *dev,
1834 struct rtl8139_private *tp, void __iomem *ioaddr)
1835{
1836 u8 tmp8;
1837#ifdef CONFIG_8139_OLD_RX_RESET
1838 int tmp_work;
1839#endif
1840
1841 netif_dbg(tp, rx_err, dev, "Ethernet frame had errors, status %08x\n",
1842 rx_status);
1843 dev->stats.rx_errors++;
1844 if (!(rx_status & RxStatusOK)) {
1845 if (rx_status & RxTooLong) {
1846 netdev_dbg(dev, "Oversized Ethernet frame, status %04x!\n",
1847 rx_status);
1848 /* A.C.: The chip hangs here. */
1849 }
1850 if (rx_status & (RxBadSymbol | RxBadAlign))
1851 dev->stats.rx_frame_errors++;
1852 if (rx_status & (RxRunt | RxTooLong))
1853 dev->stats.rx_length_errors++;
1854 if (rx_status & RxCRCErr)
1855 dev->stats.rx_crc_errors++;
1856 } else {
1857 tp->xstats.rx_lost_in_ring++;
1858 }
1859
1860#ifndef CONFIG_8139_OLD_RX_RESET
1861 tmp8 = RTL_R8 (ChipCmd);
1862 RTL_W8 (ChipCmd, tmp8 & ~CmdRxEnb);
1863 RTL_W8 (ChipCmd, tmp8);
1864 RTL_W32 (RxConfig, tp->rx_config);
1865 tp->cur_rx = 0;
1866#else
1867 /* Reset the receiver, based on RealTek recommendation. (Bug?) */
1868
1869 /* disable receive */
1870 RTL_W8_F (ChipCmd, CmdTxEnb);
1871 tmp_work = 200;
1872 while (--tmp_work > 0) {
1873 udelay(1);
1874 tmp8 = RTL_R8 (ChipCmd);
1875 if (!(tmp8 & CmdRxEnb))
1876 break;
1877 }
1878 if (tmp_work <= 0)
1879 netdev_warn(dev, "rx stop wait too long\n");
1880 /* restart receive */
1881 tmp_work = 200;
1882 while (--tmp_work > 0) {
1883 RTL_W8_F (ChipCmd, CmdRxEnb | CmdTxEnb);
1884 udelay(1);
1885 tmp8 = RTL_R8 (ChipCmd);
1886 if ((tmp8 & CmdRxEnb) && (tmp8 & CmdTxEnb))
1887 break;
1888 }
1889 if (tmp_work <= 0)
1890 netdev_warn(dev, "tx/rx enable wait too long\n");
1891
1892 /* and reinitialize all rx related registers */
1893 RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1894 /* Must enable Tx/Rx before setting transfer thresholds! */
1895 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1896
1897 tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1898 RTL_W32 (RxConfig, tp->rx_config);
1899 tp->cur_rx = 0;
1900
1901 netdev_dbg(dev, "init buffer addresses\n");
1902
1903 /* Lock Config[01234] and BMCR register writes */
1904 RTL_W8 (Cfg9346, Cfg9346_Lock);
1905
1906 /* init Rx ring buffer DMA address */
1907 RTL_W32_F (RxBuf, tp->rx_ring_dma);
1908
1909 /* A.C.: Reset the multicast list. */
1910 __set_rx_mode (dev);
1911#endif
1912}
1913
1914#if RX_BUF_IDX == 3
1915static inline void wrap_copy(struct sk_buff *skb, const unsigned char *ring,
1916 u32 offset, unsigned int size)
1917{
1918 u32 left = RX_BUF_LEN - offset;
1919
1920 if (size > left) {
1921 skb_copy_to_linear_data(skb, ring + offset, left);
1922 skb_copy_to_linear_data_offset(skb, left, ring, size - left);
1923 } else
1924 skb_copy_to_linear_data(skb, ring + offset, size);
1925}
1926#endif
1927
1928static void rtl8139_isr_ack(struct rtl8139_private *tp)
1929{
1930 void __iomem *ioaddr = tp->mmio_addr;
1931 u16 status;
1932
1933 status = RTL_R16 (IntrStatus) & RxAckBits;
1934
1935 /* Clear out errors and receive interrupts */
1936 if (likely(status != 0)) {
1937 if (unlikely(status & (RxFIFOOver | RxOverflow))) {
1938 tp->dev->stats.rx_errors++;
1939 if (status & RxFIFOOver)
1940 tp->dev->stats.rx_fifo_errors++;
1941 }
1942 RTL_W16_F (IntrStatus, RxAckBits);
1943 }
1944}
1945
1946static int rtl8139_rx(struct net_device *dev, struct rtl8139_private *tp,
1947 int budget)
1948{
1949 void __iomem *ioaddr = tp->mmio_addr;
1950 int received = 0;
1951 unsigned char *rx_ring = tp->rx_ring;
1952 unsigned int cur_rx = tp->cur_rx;
1953 unsigned int rx_size = 0;
1954
1955 netdev_dbg(dev, "In %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n",
1956 __func__, (u16)cur_rx,
1957 RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
1958
1959 while (netif_running(dev) && received < budget &&
1960 (RTL_R8 (ChipCmd) & RxBufEmpty) == 0) {
1961 u32 ring_offset = cur_rx % RX_BUF_LEN;
1962 u32 rx_status;
1963 unsigned int pkt_size;
1964 struct sk_buff *skb;
1965
1966 rmb();
1967
1968 /* read size+status of next frame from DMA ring buffer */
1969 rx_status = le32_to_cpu (*(__le32 *) (rx_ring + ring_offset));
1970 rx_size = rx_status >> 16;
1971 if (likely(!(dev->features & NETIF_F_RXFCS)))
1972 pkt_size = rx_size - 4;
1973 else
1974 pkt_size = rx_size;
1975
1976 netif_dbg(tp, rx_status, dev, "%s() status %04x, size %04x, cur %04x\n",
1977 __func__, rx_status, rx_size, cur_rx);
1978#if RTL8139_DEBUG > 2
1979 print_hex_dump(KERN_DEBUG, "Frame contents: ",
1980 DUMP_PREFIX_OFFSET, 16, 1,
1981 &rx_ring[ring_offset], 70, true);
1982#endif
1983
1984 /* Packet copy from FIFO still in progress.
1985 * Theoretically, this should never happen
1986 * since EarlyRx is disabled.
1987 */
1988 if (unlikely(rx_size == 0xfff0)) {
1989 if (!tp->fifo_copy_timeout)
1990 tp->fifo_copy_timeout = jiffies + 2;
1991 else if (time_after(jiffies, tp->fifo_copy_timeout)) {
1992 netdev_dbg(dev, "hung FIFO. Reset\n");
1993 rx_size = 0;
1994 goto no_early_rx;
1995 }
1996 netif_dbg(tp, intr, dev, "fifo copy in progress\n");
1997 tp->xstats.early_rx++;
1998 break;
1999 }
2000
2001no_early_rx:
2002 tp->fifo_copy_timeout = 0;
2003
2004 /* If Rx err or invalid rx_size/rx_status received
2005 * (which happens if we get lost in the ring),
2006 * Rx process gets reset, so we abort any further
2007 * Rx processing.
2008 */
2009 if (unlikely((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
2010 (rx_size < 8) ||
2011 (!(rx_status & RxStatusOK)))) {
2012 if ((dev->features & NETIF_F_RXALL) &&
2013 (rx_size <= (MAX_ETH_FRAME_SIZE + 4)) &&
2014 (rx_size >= 8) &&
2015 (!(rx_status & RxStatusOK))) {
2016 /* Length is at least mostly OK, but pkt has
2017 * error. I'm hoping we can handle some of these
2018 * errors without resetting the chip. --Ben
2019 */
2020 dev->stats.rx_errors++;
2021 if (rx_status & RxCRCErr) {
2022 dev->stats.rx_crc_errors++;
2023 goto keep_pkt;
2024 }
2025 if (rx_status & RxRunt) {
2026 dev->stats.rx_length_errors++;
2027 goto keep_pkt;
2028 }
2029 }
2030 rtl8139_rx_err (rx_status, dev, tp, ioaddr);
2031 received = -1;
2032 goto out;
2033 }
2034
2035keep_pkt:
2036 /* Malloc up new buffer, compatible with net-2e. */
2037 /* Omit the four octet CRC from the length. */
2038
2039 skb = napi_alloc_skb(&tp->napi, pkt_size);
2040 if (likely(skb)) {
2041#if RX_BUF_IDX == 3
2042 wrap_copy(skb, rx_ring, ring_offset+4, pkt_size);
2043#else
2044 skb_copy_to_linear_data (skb, &rx_ring[ring_offset + 4], pkt_size);
2045#endif
2046 skb_put (skb, pkt_size);
2047
2048 skb->protocol = eth_type_trans (skb, dev);
2049
2050 u64_stats_update_begin(&tp->rx_stats.syncp);
2051 tp->rx_stats.packets++;
2052 tp->rx_stats.bytes += pkt_size;
2053 u64_stats_update_end(&tp->rx_stats.syncp);
2054
2055 netif_receive_skb (skb);
2056 } else {
2057 dev->stats.rx_dropped++;
2058 }
2059 received++;
2060
2061 cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
2062 RTL_W16 (RxBufPtr, (u16) (cur_rx - 16));
2063
2064 rtl8139_isr_ack(tp);
2065 }
2066
2067 if (unlikely(!received || rx_size == 0xfff0))
2068 rtl8139_isr_ack(tp);
2069
2070 netdev_dbg(dev, "Done %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n",
2071 __func__, cur_rx,
2072 RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
2073
2074 tp->cur_rx = cur_rx;
2075
2076 /*
2077 * The receive buffer should be mostly empty.
2078 * Tell NAPI to reenable the Rx irq.
2079 */
2080 if (tp->fifo_copy_timeout)
2081 received = budget;
2082
2083out:
2084 return received;
2085}
2086
2087
2088static void rtl8139_weird_interrupt (struct net_device *dev,
2089 struct rtl8139_private *tp,
2090 void __iomem *ioaddr,
2091 int status, int link_changed)
2092{
2093 netdev_dbg(dev, "Abnormal interrupt, status %08x\n", status);
2094
2095 assert (dev != NULL);
2096 assert (tp != NULL);
2097 assert (ioaddr != NULL);
2098
2099 /* Update the error count. */
2100 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2101 RTL_W32 (RxMissed, 0);
2102
2103 if ((status & RxUnderrun) && link_changed &&
2104 (tp->drv_flags & HAS_LNK_CHNG)) {
2105 rtl_check_media(dev, 0);
2106 status &= ~RxUnderrun;
2107 }
2108
2109 if (status & (RxUnderrun | RxErr))
2110 dev->stats.rx_errors++;
2111
2112 if (status & PCSTimeout)
2113 dev->stats.rx_length_errors++;
2114 if (status & RxUnderrun)
2115 dev->stats.rx_fifo_errors++;
2116 if (status & PCIErr) {
2117 u16 pci_cmd_status;
2118 pci_read_config_word (tp->pci_dev, PCI_STATUS, &pci_cmd_status);
2119 pci_write_config_word (tp->pci_dev, PCI_STATUS, pci_cmd_status);
2120
2121 netdev_err(dev, "PCI Bus error %04x\n", pci_cmd_status);
2122 }
2123}
2124
2125static int rtl8139_poll(struct napi_struct *napi, int budget)
2126{
2127 struct rtl8139_private *tp = container_of(napi, struct rtl8139_private, napi);
2128 struct net_device *dev = tp->dev;
2129 void __iomem *ioaddr = tp->mmio_addr;
2130 int work_done;
2131
2132 spin_lock(&tp->rx_lock);
2133 work_done = 0;
2134 if (likely(RTL_R16(IntrStatus) & RxAckBits))
2135 work_done += rtl8139_rx(dev, tp, budget);
2136
2137 if (work_done < budget) {
2138 unsigned long flags;
2139
2140 spin_lock_irqsave(&tp->lock, flags);
2141 if (napi_complete_done(napi, work_done))
2142 RTL_W16_F(IntrMask, rtl8139_intr_mask);
2143 spin_unlock_irqrestore(&tp->lock, flags);
2144 }
2145 spin_unlock(&tp->rx_lock);
2146
2147 return work_done;
2148}
2149
2150/* The interrupt handler does all of the Rx thread work and cleans up
2151 after the Tx thread. */
2152static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance)
2153{
2154 struct net_device *dev = (struct net_device *) dev_instance;
2155 struct rtl8139_private *tp = netdev_priv(dev);
2156 void __iomem *ioaddr = tp->mmio_addr;
2157 u16 status, ackstat;
2158 int link_changed = 0; /* avoid bogus "uninit" warning */
2159 int handled = 0;
2160
2161 spin_lock (&tp->lock);
2162 status = RTL_R16 (IntrStatus);
2163
2164 /* shared irq? */
2165 if (unlikely((status & rtl8139_intr_mask) == 0))
2166 goto out;
2167
2168 handled = 1;
2169
2170 /* h/w no longer present (hotplug?) or major error, bail */
2171 if (unlikely(status == 0xFFFF))
2172 goto out;
2173
2174 /* close possible race's with dev_close */
2175 if (unlikely(!netif_running(dev))) {
2176 RTL_W16 (IntrMask, 0);
2177 goto out;
2178 }
2179
2180 /* Acknowledge all of the current interrupt sources ASAP, but
2181 an first get an additional status bit from CSCR. */
2182 if (unlikely(status & RxUnderrun))
2183 link_changed = RTL_R16 (CSCR) & CSCR_LinkChangeBit;
2184
2185 ackstat = status & ~(RxAckBits | TxErr);
2186 if (ackstat)
2187 RTL_W16 (IntrStatus, ackstat);
2188
2189 /* Receive packets are processed by poll routine.
2190 If not running start it now. */
2191 if (status & RxAckBits){
2192 if (napi_schedule_prep(&tp->napi)) {
2193 RTL_W16_F (IntrMask, rtl8139_norx_intr_mask);
2194 __napi_schedule(&tp->napi);
2195 }
2196 }
2197
2198 /* Check uncommon events with one test. */
2199 if (unlikely(status & (PCIErr | PCSTimeout | RxUnderrun | RxErr)))
2200 rtl8139_weird_interrupt (dev, tp, ioaddr,
2201 status, link_changed);
2202
2203 if (status & (TxOK | TxErr)) {
2204 rtl8139_tx_interrupt (dev, tp, ioaddr);
2205 if (status & TxErr)
2206 RTL_W16 (IntrStatus, TxErr);
2207 }
2208 out:
2209 spin_unlock (&tp->lock);
2210
2211 netdev_dbg(dev, "exiting interrupt, intr_status=%#4.4x\n",
2212 RTL_R16(IntrStatus));
2213 return IRQ_RETVAL(handled);
2214}
2215
2216#ifdef CONFIG_NET_POLL_CONTROLLER
2217/*
2218 * Polling receive - used by netconsole and other diagnostic tools
2219 * to allow network i/o with interrupts disabled.
2220 */
2221static void rtl8139_poll_controller(struct net_device *dev)
2222{
2223 struct rtl8139_private *tp = netdev_priv(dev);
2224 const int irq = tp->pci_dev->irq;
2225
2226 disable_irq_nosync(irq);
2227 rtl8139_interrupt(irq, dev);
2228 enable_irq(irq);
2229}
2230#endif
2231
2232static int rtl8139_set_mac_address(struct net_device *dev, void *p)
2233{
2234 struct rtl8139_private *tp = netdev_priv(dev);
2235 void __iomem *ioaddr = tp->mmio_addr;
2236 struct sockaddr *addr = p;
2237
2238 if (!is_valid_ether_addr(addr->sa_data))
2239 return -EADDRNOTAVAIL;
2240
2241 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
2242
2243 spin_lock_irq(&tp->lock);
2244
2245 RTL_W8_F(Cfg9346, Cfg9346_Unlock);
2246 RTL_W32_F(MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
2247 RTL_W32_F(MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
2248 RTL_W8_F(Cfg9346, Cfg9346_Lock);
2249
2250 spin_unlock_irq(&tp->lock);
2251
2252 return 0;
2253}
2254
2255static int rtl8139_close (struct net_device *dev)
2256{
2257 struct rtl8139_private *tp = netdev_priv(dev);
2258 void __iomem *ioaddr = tp->mmio_addr;
2259 unsigned long flags;
2260
2261 netif_stop_queue(dev);
2262 napi_disable(&tp->napi);
2263
2264 netif_dbg(tp, ifdown, dev, "Shutting down ethercard, status was 0x%04x\n",
2265 RTL_R16(IntrStatus));
2266
2267 spin_lock_irqsave (&tp->lock, flags);
2268
2269 /* Stop the chip's Tx and Rx DMA processes. */
2270 RTL_W8 (ChipCmd, 0);
2271
2272 /* Disable interrupts by clearing the interrupt mask. */
2273 RTL_W16 (IntrMask, 0);
2274
2275 /* Update the error counts. */
2276 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2277 RTL_W32 (RxMissed, 0);
2278
2279 spin_unlock_irqrestore (&tp->lock, flags);
2280
2281 free_irq(tp->pci_dev->irq, dev);
2282
2283 rtl8139_tx_clear (tp);
2284
2285 dma_free_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
2286 tp->rx_ring, tp->rx_ring_dma);
2287 dma_free_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
2288 tp->tx_bufs, tp->tx_bufs_dma);
2289 tp->rx_ring = NULL;
2290 tp->tx_bufs = NULL;
2291
2292 /* Green! Put the chip in low-power mode. */
2293 RTL_W8 (Cfg9346, Cfg9346_Unlock);
2294
2295 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
2296 RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
2297
2298 return 0;
2299}
2300
2301
2302/* Get the ethtool Wake-on-LAN settings. Assumes that wol points to
2303 kernel memory, *wol has been initialized as {ETHTOOL_GWOL}, and
2304 other threads or interrupts aren't messing with the 8139. */
2305static void rtl8139_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2306{
2307 struct rtl8139_private *tp = netdev_priv(dev);
2308 void __iomem *ioaddr = tp->mmio_addr;
2309
2310 spin_lock_irq(&tp->lock);
2311 if (rtl_chip_info[tp->chipset].flags & HasLWake) {
2312 u8 cfg3 = RTL_R8 (Config3);
2313 u8 cfg5 = RTL_R8 (Config5);
2314
2315 wol->supported = WAKE_PHY | WAKE_MAGIC
2316 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
2317
2318 wol->wolopts = 0;
2319 if (cfg3 & Cfg3_LinkUp)
2320 wol->wolopts |= WAKE_PHY;
2321 if (cfg3 & Cfg3_Magic)
2322 wol->wolopts |= WAKE_MAGIC;
2323 /* (KON)FIXME: See how netdev_set_wol() handles the
2324 following constants. */
2325 if (cfg5 & Cfg5_UWF)
2326 wol->wolopts |= WAKE_UCAST;
2327 if (cfg5 & Cfg5_MWF)
2328 wol->wolopts |= WAKE_MCAST;
2329 if (cfg5 & Cfg5_BWF)
2330 wol->wolopts |= WAKE_BCAST;
2331 }
2332 spin_unlock_irq(&tp->lock);
2333}
2334
2335
2336/* Set the ethtool Wake-on-LAN settings. Return 0 or -errno. Assumes
2337 that wol points to kernel memory and other threads or interrupts
2338 aren't messing with the 8139. */
2339static int rtl8139_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2340{
2341 struct rtl8139_private *tp = netdev_priv(dev);
2342 void __iomem *ioaddr = tp->mmio_addr;
2343 u32 support;
2344 u8 cfg3, cfg5;
2345
2346 support = ((rtl_chip_info[tp->chipset].flags & HasLWake)
2347 ? (WAKE_PHY | WAKE_MAGIC
2348 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST)
2349 : 0);
2350 if (wol->wolopts & ~support)
2351 return -EINVAL;
2352
2353 spin_lock_irq(&tp->lock);
2354 cfg3 = RTL_R8 (Config3) & ~(Cfg3_LinkUp | Cfg3_Magic);
2355 if (wol->wolopts & WAKE_PHY)
2356 cfg3 |= Cfg3_LinkUp;
2357 if (wol->wolopts & WAKE_MAGIC)
2358 cfg3 |= Cfg3_Magic;
2359 RTL_W8 (Cfg9346, Cfg9346_Unlock);
2360 RTL_W8 (Config3, cfg3);
2361 RTL_W8 (Cfg9346, Cfg9346_Lock);
2362
2363 cfg5 = RTL_R8 (Config5) & ~(Cfg5_UWF | Cfg5_MWF | Cfg5_BWF);
2364 /* (KON)FIXME: These are untested. We may have to set the
2365 CRC0, Wakeup0 and LSBCRC0 registers too, but I have no
2366 documentation. */
2367 if (wol->wolopts & WAKE_UCAST)
2368 cfg5 |= Cfg5_UWF;
2369 if (wol->wolopts & WAKE_MCAST)
2370 cfg5 |= Cfg5_MWF;
2371 if (wol->wolopts & WAKE_BCAST)
2372 cfg5 |= Cfg5_BWF;
2373 RTL_W8 (Config5, cfg5); /* need not unlock via Cfg9346 */
2374 spin_unlock_irq(&tp->lock);
2375
2376 return 0;
2377}
2378
2379static void rtl8139_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2380{
2381 struct rtl8139_private *tp = netdev_priv(dev);
2382 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
2383 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
2384 strlcpy(info->bus_info, pci_name(tp->pci_dev), sizeof(info->bus_info));
2385}
2386
2387static int rtl8139_get_link_ksettings(struct net_device *dev,
2388 struct ethtool_link_ksettings *cmd)
2389{
2390 struct rtl8139_private *tp = netdev_priv(dev);
2391 spin_lock_irq(&tp->lock);
2392 mii_ethtool_get_link_ksettings(&tp->mii, cmd);
2393 spin_unlock_irq(&tp->lock);
2394 return 0;
2395}
2396
2397static int rtl8139_set_link_ksettings(struct net_device *dev,
2398 const struct ethtool_link_ksettings *cmd)
2399{
2400 struct rtl8139_private *tp = netdev_priv(dev);
2401 int rc;
2402 spin_lock_irq(&tp->lock);
2403 rc = mii_ethtool_set_link_ksettings(&tp->mii, cmd);
2404 spin_unlock_irq(&tp->lock);
2405 return rc;
2406}
2407
2408static int rtl8139_nway_reset(struct net_device *dev)
2409{
2410 struct rtl8139_private *tp = netdev_priv(dev);
2411 return mii_nway_restart(&tp->mii);
2412}
2413
2414static u32 rtl8139_get_link(struct net_device *dev)
2415{
2416 struct rtl8139_private *tp = netdev_priv(dev);
2417 return mii_link_ok(&tp->mii);
2418}
2419
2420static u32 rtl8139_get_msglevel(struct net_device *dev)
2421{
2422 struct rtl8139_private *tp = netdev_priv(dev);
2423 return tp->msg_enable;
2424}
2425
2426static void rtl8139_set_msglevel(struct net_device *dev, u32 datum)
2427{
2428 struct rtl8139_private *tp = netdev_priv(dev);
2429 tp->msg_enable = datum;
2430}
2431
2432static int rtl8139_get_regs_len(struct net_device *dev)
2433{
2434 struct rtl8139_private *tp;
2435 /* TODO: we are too slack to do reg dumping for pio, for now */
2436 if (use_io)
2437 return 0;
2438 tp = netdev_priv(dev);
2439 return tp->regs_len;
2440}
2441
2442static void rtl8139_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
2443{
2444 struct rtl8139_private *tp;
2445
2446 /* TODO: we are too slack to do reg dumping for pio, for now */
2447 if (use_io)
2448 return;
2449 tp = netdev_priv(dev);
2450
2451 regs->version = RTL_REGS_VER;
2452
2453 spin_lock_irq(&tp->lock);
2454 memcpy_fromio(regbuf, tp->mmio_addr, regs->len);
2455 spin_unlock_irq(&tp->lock);
2456}
2457
2458static int rtl8139_get_sset_count(struct net_device *dev, int sset)
2459{
2460 switch (sset) {
2461 case ETH_SS_STATS:
2462 return RTL_NUM_STATS;
2463 default:
2464 return -EOPNOTSUPP;
2465 }
2466}
2467
2468static void rtl8139_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2469{
2470 struct rtl8139_private *tp = netdev_priv(dev);
2471
2472 data[0] = tp->xstats.early_rx;
2473 data[1] = tp->xstats.tx_buf_mapped;
2474 data[2] = tp->xstats.tx_timeouts;
2475 data[3] = tp->xstats.rx_lost_in_ring;
2476}
2477
2478static void rtl8139_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2479{
2480 memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2481}
2482
2483static const struct ethtool_ops rtl8139_ethtool_ops = {
2484 .get_drvinfo = rtl8139_get_drvinfo,
2485 .get_regs_len = rtl8139_get_regs_len,
2486 .get_regs = rtl8139_get_regs,
2487 .nway_reset = rtl8139_nway_reset,
2488 .get_link = rtl8139_get_link,
2489 .get_msglevel = rtl8139_get_msglevel,
2490 .set_msglevel = rtl8139_set_msglevel,
2491 .get_wol = rtl8139_get_wol,
2492 .set_wol = rtl8139_set_wol,
2493 .get_strings = rtl8139_get_strings,
2494 .get_sset_count = rtl8139_get_sset_count,
2495 .get_ethtool_stats = rtl8139_get_ethtool_stats,
2496 .get_link_ksettings = rtl8139_get_link_ksettings,
2497 .set_link_ksettings = rtl8139_set_link_ksettings,
2498};
2499
2500static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2501{
2502 struct rtl8139_private *tp = netdev_priv(dev);
2503 int rc;
2504
2505 if (!netif_running(dev))
2506 return -EINVAL;
2507
2508 spin_lock_irq(&tp->lock);
2509 rc = generic_mii_ioctl(&tp->mii, if_mii(rq), cmd, NULL);
2510 spin_unlock_irq(&tp->lock);
2511
2512 return rc;
2513}
2514
2515
2516static void
2517rtl8139_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
2518{
2519 struct rtl8139_private *tp = netdev_priv(dev);
2520 void __iomem *ioaddr = tp->mmio_addr;
2521 unsigned long flags;
2522 unsigned int start;
2523
2524 if (netif_running(dev)) {
2525 spin_lock_irqsave (&tp->lock, flags);
2526 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2527 RTL_W32 (RxMissed, 0);
2528 spin_unlock_irqrestore (&tp->lock, flags);
2529 }
2530
2531 netdev_stats_to_stats64(stats, &dev->stats);
2532
2533 do {
2534 start = u64_stats_fetch_begin_irq(&tp->rx_stats.syncp);
2535 stats->rx_packets = tp->rx_stats.packets;
2536 stats->rx_bytes = tp->rx_stats.bytes;
2537 } while (u64_stats_fetch_retry_irq(&tp->rx_stats.syncp, start));
2538
2539 do {
2540 start = u64_stats_fetch_begin_irq(&tp->tx_stats.syncp);
2541 stats->tx_packets = tp->tx_stats.packets;
2542 stats->tx_bytes = tp->tx_stats.bytes;
2543 } while (u64_stats_fetch_retry_irq(&tp->tx_stats.syncp, start));
2544}
2545
2546/* Set or clear the multicast filter for this adaptor.
2547 This routine is not state sensitive and need not be SMP locked. */
2548
2549static void __set_rx_mode (struct net_device *dev)
2550{
2551 struct rtl8139_private *tp = netdev_priv(dev);
2552 void __iomem *ioaddr = tp->mmio_addr;
2553 u32 mc_filter[2]; /* Multicast hash filter */
2554 int rx_mode;
2555 u32 tmp;
2556
2557 netdev_dbg(dev, "rtl8139_set_rx_mode(%04x) done -- Rx config %08x\n",
2558 dev->flags, RTL_R32(RxConfig));
2559
2560 /* Note: do not reorder, GCC is clever about common statements. */
2561 if (dev->flags & IFF_PROMISC) {
2562 rx_mode =
2563 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
2564 AcceptAllPhys;
2565 mc_filter[1] = mc_filter[0] = 0xffffffff;
2566 } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
2567 (dev->flags & IFF_ALLMULTI)) {
2568 /* Too many to filter perfectly -- accept all multicasts. */
2569 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
2570 mc_filter[1] = mc_filter[0] = 0xffffffff;
2571 } else {
2572 struct netdev_hw_addr *ha;
2573 rx_mode = AcceptBroadcast | AcceptMyPhys;
2574 mc_filter[1] = mc_filter[0] = 0;
2575 netdev_for_each_mc_addr(ha, dev) {
2576 int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
2577
2578 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
2579 rx_mode |= AcceptMulticast;
2580 }
2581 }
2582
2583 if (dev->features & NETIF_F_RXALL)
2584 rx_mode |= (AcceptErr | AcceptRunt);
2585
2586 /* We can safely update without stopping the chip. */
2587 tmp = rtl8139_rx_config | rx_mode;
2588 if (tp->rx_config != tmp) {
2589 RTL_W32_F (RxConfig, tmp);
2590 tp->rx_config = tmp;
2591 }
2592 RTL_W32_F (MAR0 + 0, mc_filter[0]);
2593 RTL_W32_F (MAR0 + 4, mc_filter[1]);
2594}
2595
2596static void rtl8139_set_rx_mode (struct net_device *dev)
2597{
2598 unsigned long flags;
2599 struct rtl8139_private *tp = netdev_priv(dev);
2600
2601 spin_lock_irqsave (&tp->lock, flags);
2602 __set_rx_mode(dev);
2603 spin_unlock_irqrestore (&tp->lock, flags);
2604}
2605
2606static int __maybe_unused rtl8139_suspend(struct device *device)
2607{
2608 struct net_device *dev = dev_get_drvdata(device);
2609 struct rtl8139_private *tp = netdev_priv(dev);
2610 void __iomem *ioaddr = tp->mmio_addr;
2611 unsigned long flags;
2612
2613 if (!netif_running (dev))
2614 return 0;
2615
2616 netif_device_detach (dev);
2617
2618 spin_lock_irqsave (&tp->lock, flags);
2619
2620 /* Disable interrupts, stop Tx and Rx. */
2621 RTL_W16 (IntrMask, 0);
2622 RTL_W8 (ChipCmd, 0);
2623
2624 /* Update the error counts. */
2625 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2626 RTL_W32 (RxMissed, 0);
2627
2628 spin_unlock_irqrestore (&tp->lock, flags);
2629
2630 return 0;
2631}
2632
2633static int __maybe_unused rtl8139_resume(struct device *device)
2634{
2635 struct net_device *dev = dev_get_drvdata(device);
2636
2637 if (!netif_running (dev))
2638 return 0;
2639
2640 rtl8139_init_ring (dev);
2641 rtl8139_hw_start (dev);
2642 netif_device_attach (dev);
2643 return 0;
2644}
2645
2646static SIMPLE_DEV_PM_OPS(rtl8139_pm_ops, rtl8139_suspend, rtl8139_resume);
2647
2648static struct pci_driver rtl8139_pci_driver = {
2649 .name = DRV_NAME,
2650 .id_table = rtl8139_pci_tbl,
2651 .probe = rtl8139_init_one,
2652 .remove = rtl8139_remove_one,
2653 .driver.pm = &rtl8139_pm_ops,
2654};
2655
2656
2657static int __init rtl8139_init_module (void)
2658{
2659 /* when we're a module, we always print a version message,
2660 * even if no 8139 board is found.
2661 */
2662#ifdef MODULE
2663 pr_info(RTL8139_DRIVER_NAME "\n");
2664#endif
2665
2666 return pci_register_driver(&rtl8139_pci_driver);
2667}
2668
2669
2670static void __exit rtl8139_cleanup_module (void)
2671{
2672 pci_unregister_driver (&rtl8139_pci_driver);
2673}
2674
2675
2676module_init(rtl8139_init_module);
2677module_exit(rtl8139_cleanup_module);