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 { .str: "tx_buf_mapped" },
288 { .str: "tx_timeouts" },
289 { .str: "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 (dev: 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 (usec: 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(error: -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 (dev: 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 (dev: pdev);
796
797 u64_stats_init(syncp: &tp->rx_stats.syncp);
798 u64_stats_init(syncp: &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(dev: pdev, bar, max: 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 (dev: pdev);
897 return ERR_PTR(error: 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(lock: &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_eth_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 __le16 addr[ETH_ALEN / 2];
949 int i, addr_len, option;
950 void __iomem *ioaddr;
951 static int board_idx = -1;
952
953 assert (pdev != NULL);
954 assert (ent != NULL);
955
956 board_idx++;
957
958 /* when we're built into the kernel, the driver version message
959 * is only printed if at least one 8139 board has been found
960 */
961#ifndef MODULE
962 {
963 static int printed_version;
964 if (!printed_version++)
965 pr_info(RTL8139_DRIVER_NAME "\n");
966 }
967#endif
968
969 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
970 pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pdev->revision >= 0x20) {
971 dev_info(&pdev->dev,
972 "This (id %04x:%04x rev %02x) is an enhanced 8139C+ chip, use 8139cp\n",
973 pdev->vendor, pdev->device, pdev->revision);
974 return -ENODEV;
975 }
976
977 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
978 pdev->device == PCI_DEVICE_ID_REALTEK_8139 &&
979 pdev->subsystem_vendor == PCI_VENDOR_ID_ATHEROS &&
980 pdev->subsystem_device == PCI_DEVICE_ID_REALTEK_8139) {
981 pr_info("OQO Model 2 detected. Forcing PIO\n");
982 use_io = true;
983 }
984
985 dev = rtl8139_init_board (pdev);
986 if (IS_ERR(ptr: dev))
987 return PTR_ERR(ptr: dev);
988
989 assert (dev != NULL);
990 tp = netdev_priv(dev);
991 tp->dev = dev;
992
993 ioaddr = tp->mmio_addr;
994 assert (ioaddr != NULL);
995
996 addr_len = read_eeprom (ioaddr, location: 0, addr_len: 8) == 0x8129 ? 8 : 6;
997 for (i = 0; i < 3; i++)
998 addr[i] = cpu_to_le16(read_eeprom (ioaddr, i + 7, addr_len));
999 eth_hw_addr_set(dev, addr: (u8 *)addr);
1000
1001 /* The Rtl8139-specific entries in the device structure. */
1002 dev->netdev_ops = &rtl8139_netdev_ops;
1003 dev->ethtool_ops = &rtl8139_ethtool_ops;
1004 dev->watchdog_timeo = TX_TIMEOUT;
1005 netif_napi_add(dev, napi: &tp->napi, poll: rtl8139_poll);
1006
1007 /* note: the hardware is not capable of sg/csum/highdma, however
1008 * through the use of skb_copy_and_csum_dev we enable these
1009 * features
1010 */
1011 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
1012 dev->vlan_features = dev->features;
1013
1014 dev->hw_features |= NETIF_F_RXALL;
1015 dev->hw_features |= NETIF_F_RXFCS;
1016
1017 /* MTU range: 68 - 1770 */
1018 dev->min_mtu = ETH_MIN_MTU;
1019 dev->max_mtu = MAX_ETH_DATA_SIZE;
1020
1021 /* tp zeroed and aligned in alloc_etherdev */
1022 tp = netdev_priv(dev);
1023
1024 /* note: tp->chipset set in rtl8139_init_board */
1025 tp->drv_flags = board_info[ent->driver_data].hw_flags;
1026 tp->mmio_addr = ioaddr;
1027 tp->msg_enable =
1028 (debug < 0 ? RTL8139_DEF_MSG_ENABLE : ((1 << debug) - 1));
1029 spin_lock_init (&tp->lock);
1030 spin_lock_init (&tp->rx_lock);
1031 INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
1032 tp->mii.dev = dev;
1033 tp->mii.mdio_read = mdio_read;
1034 tp->mii.mdio_write = mdio_write;
1035 tp->mii.phy_id_mask = 0x3f;
1036 tp->mii.reg_num_mask = 0x1f;
1037
1038 /* dev is fully set up and ready to use now */
1039 pr_debug("about to register device named %s (%p)...\n",
1040 dev->name, dev);
1041 i = register_netdev (dev);
1042 if (i) goto err_out;
1043
1044 pci_set_drvdata (pdev, data: dev);
1045
1046 netdev_info(dev, format: "%s at 0x%p, %pM, IRQ %d\n",
1047 board_info[ent->driver_data].name,
1048 ioaddr, dev->dev_addr, pdev->irq);
1049
1050 netdev_dbg(dev, "Identified 8139 chip type '%s'\n",
1051 rtl_chip_info[tp->chipset].name);
1052
1053 /* Find the connected MII xcvrs.
1054 Doing this in open() would allow detecting external xcvrs later, but
1055 takes too much time. */
1056#ifdef CONFIG_8139TOO_8129
1057 if (tp->drv_flags & HAS_MII_XCVR) {
1058 int phy, phy_idx = 0;
1059 for (phy = 0; phy < 32 && phy_idx < sizeof(tp->phys); phy++) {
1060 int mii_status = mdio_read(dev, phy, 1);
1061 if (mii_status != 0xffff && mii_status != 0x0000) {
1062 u16 advertising = mdio_read(dev, phy, 4);
1063 tp->phys[phy_idx++] = phy;
1064 netdev_info(dev, "MII transceiver %d status 0x%04x advertising %04x\n",
1065 phy, mii_status, advertising);
1066 }
1067 }
1068 if (phy_idx == 0) {
1069 netdev_info(dev, "No MII transceivers found! Assuming SYM transceiver\n");
1070 tp->phys[0] = 32;
1071 }
1072 } else
1073#endif
1074 tp->phys[0] = 32;
1075 tp->mii.phy_id = tp->phys[0];
1076
1077 /* The lower four bits are the media type. */
1078 option = (board_idx >= MAX_UNITS) ? 0 : media[board_idx];
1079 if (option > 0) {
1080 tp->mii.full_duplex = (option & 0x210) ? 1 : 0;
1081 tp->default_port = option & 0xFF;
1082 if (tp->default_port)
1083 tp->mii.force_media = 1;
1084 }
1085 if (board_idx < MAX_UNITS && full_duplex[board_idx] > 0)
1086 tp->mii.full_duplex = full_duplex[board_idx];
1087 if (tp->mii.full_duplex) {
1088 netdev_info(dev, format: "Media type forced to Full Duplex\n");
1089 /* Changing the MII-advertised media because might prevent
1090 re-connection. */
1091 tp->mii.force_media = 1;
1092 }
1093 if (tp->default_port) {
1094 netdev_info(dev, format: " Forcing %dMbps %s-duplex operation\n",
1095 (option & 0x20 ? 100 : 10),
1096 (option & 0x10 ? "full" : "half"));
1097 mdio_write(dev, phy_id: tp->phys[0], location: 0,
1098 val: ((option & 0x20) ? 0x2000 : 0) | /* 100Mbps? */
1099 ((option & 0x10) ? 0x0100 : 0)); /* Full duplex? */
1100 }
1101
1102 /* Put the chip into low-power mode. */
1103 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1104 RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
1105
1106 return 0;
1107
1108err_out:
1109 __rtl8139_cleanup_dev (dev);
1110 pci_disable_device (dev: pdev);
1111 return i;
1112}
1113
1114
1115static void rtl8139_remove_one(struct pci_dev *pdev)
1116{
1117 struct net_device *dev = pci_get_drvdata (pdev);
1118 struct rtl8139_private *tp = netdev_priv(dev);
1119
1120 assert (dev != NULL);
1121
1122 cancel_delayed_work_sync(dwork: &tp->thread);
1123
1124 unregister_netdev (dev);
1125
1126 __rtl8139_cleanup_dev (dev);
1127 pci_disable_device (dev: pdev);
1128}
1129
1130
1131/* Serial EEPROM section. */
1132
1133/* EEPROM_Ctrl bits. */
1134#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
1135#define EE_CS 0x08 /* EEPROM chip select. */
1136#define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
1137#define EE_WRITE_0 0x00
1138#define EE_WRITE_1 0x02
1139#define EE_DATA_READ 0x01 /* EEPROM chip data out. */
1140#define EE_ENB (0x80 | EE_CS)
1141
1142/* Delay between EEPROM clock transitions.
1143 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1144 */
1145
1146#define eeprom_delay() (void)RTL_R8(Cfg9346)
1147
1148/* The EEPROM commands include the alway-set leading bit. */
1149#define EE_WRITE_CMD (5)
1150#define EE_READ_CMD (6)
1151#define EE_ERASE_CMD (7)
1152
1153static int read_eeprom(void __iomem *ioaddr, int location, int addr_len)
1154{
1155 int i;
1156 unsigned retval = 0;
1157 int read_cmd = location | (EE_READ_CMD << addr_len);
1158
1159 RTL_W8 (Cfg9346, EE_ENB & ~EE_CS);
1160 RTL_W8 (Cfg9346, EE_ENB);
1161 eeprom_delay ();
1162
1163 /* Shift the read command bits out. */
1164 for (i = 4 + addr_len; i >= 0; i--) {
1165 int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1166 RTL_W8 (Cfg9346, EE_ENB | dataval);
1167 eeprom_delay ();
1168 RTL_W8 (Cfg9346, EE_ENB | dataval | EE_SHIFT_CLK);
1169 eeprom_delay ();
1170 }
1171 RTL_W8 (Cfg9346, EE_ENB);
1172 eeprom_delay ();
1173
1174 for (i = 16; i > 0; i--) {
1175 RTL_W8 (Cfg9346, EE_ENB | EE_SHIFT_CLK);
1176 eeprom_delay ();
1177 retval =
1178 (retval << 1) | ((RTL_R8 (Cfg9346) & EE_DATA_READ) ? 1 :
1179 0);
1180 RTL_W8 (Cfg9346, EE_ENB);
1181 eeprom_delay ();
1182 }
1183
1184 /* Terminate the EEPROM access. */
1185 RTL_W8(Cfg9346, 0);
1186 eeprom_delay ();
1187
1188 return retval;
1189}
1190
1191/* MII serial management: mostly bogus for now. */
1192/* Read and write the MII management registers using software-generated
1193 serial MDIO protocol.
1194 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
1195 met by back-to-back PCI I/O cycles, but we insert a delay to avoid
1196 "overclocking" issues. */
1197#define MDIO_DIR 0x80
1198#define MDIO_DATA_OUT 0x04
1199#define MDIO_DATA_IN 0x02
1200#define MDIO_CLK 0x01
1201#define MDIO_WRITE0 (MDIO_DIR)
1202#define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
1203
1204#define mdio_delay() RTL_R8(Config4)
1205
1206
1207static const char mii_2_8139_map[8] = {
1208 BasicModeCtrl,
1209 BasicModeStatus,
1210 0,
1211 0,
1212 NWayAdvert,
1213 NWayLPAR,
1214 NWayExpansion,
1215 0
1216};
1217
1218
1219#ifdef CONFIG_8139TOO_8129
1220/* Syncronize the MII management interface by shifting 32 one bits out. */
1221static void mdio_sync (void __iomem *ioaddr)
1222{
1223 int i;
1224
1225 for (i = 32; i >= 0; i--) {
1226 RTL_W8 (Config4, MDIO_WRITE1);
1227 mdio_delay ();
1228 RTL_W8 (Config4, MDIO_WRITE1 | MDIO_CLK);
1229 mdio_delay ();
1230 }
1231}
1232#endif
1233
1234static int mdio_read (struct net_device *dev, int phy_id, int location)
1235{
1236 struct rtl8139_private *tp = netdev_priv(dev);
1237 int retval = 0;
1238#ifdef CONFIG_8139TOO_8129
1239 void __iomem *ioaddr = tp->mmio_addr;
1240 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
1241 int i;
1242#endif
1243
1244 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1245 void __iomem *ioaddr = tp->mmio_addr;
1246 return location < 8 && mii_2_8139_map[location] ?
1247 RTL_R16 (mii_2_8139_map[location]) : 0;
1248 }
1249
1250#ifdef CONFIG_8139TOO_8129
1251 mdio_sync (ioaddr);
1252 /* Shift the read command bits out. */
1253 for (i = 15; i >= 0; i--) {
1254 int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0;
1255
1256 RTL_W8 (Config4, MDIO_DIR | dataval);
1257 mdio_delay ();
1258 RTL_W8 (Config4, MDIO_DIR | dataval | MDIO_CLK);
1259 mdio_delay ();
1260 }
1261
1262 /* Read the two transition, 16 data, and wire-idle bits. */
1263 for (i = 19; i > 0; i--) {
1264 RTL_W8 (Config4, 0);
1265 mdio_delay ();
1266 retval = (retval << 1) | ((RTL_R8 (Config4) & MDIO_DATA_IN) ? 1 : 0);
1267 RTL_W8 (Config4, MDIO_CLK);
1268 mdio_delay ();
1269 }
1270#endif
1271
1272 return (retval >> 1) & 0xffff;
1273}
1274
1275
1276static void mdio_write (struct net_device *dev, int phy_id, int location,
1277 int value)
1278{
1279 struct rtl8139_private *tp = netdev_priv(dev);
1280#ifdef CONFIG_8139TOO_8129
1281 void __iomem *ioaddr = tp->mmio_addr;
1282 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location << 18) | value;
1283 int i;
1284#endif
1285
1286 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1287 void __iomem *ioaddr = tp->mmio_addr;
1288 if (location == 0) {
1289 RTL_W8 (Cfg9346, Cfg9346_Unlock);
1290 RTL_W16 (BasicModeCtrl, value);
1291 RTL_W8 (Cfg9346, Cfg9346_Lock);
1292 } else if (location < 8 && mii_2_8139_map[location])
1293 RTL_W16 (mii_2_8139_map[location], value);
1294 return;
1295 }
1296
1297#ifdef CONFIG_8139TOO_8129
1298 mdio_sync (ioaddr);
1299
1300 /* Shift the command bits out. */
1301 for (i = 31; i >= 0; i--) {
1302 int dataval =
1303 (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
1304 RTL_W8 (Config4, dataval);
1305 mdio_delay ();
1306 RTL_W8 (Config4, dataval | MDIO_CLK);
1307 mdio_delay ();
1308 }
1309 /* Clear out extra bits. */
1310 for (i = 2; i > 0; i--) {
1311 RTL_W8 (Config4, 0);
1312 mdio_delay ();
1313 RTL_W8 (Config4, MDIO_CLK);
1314 mdio_delay ();
1315 }
1316#endif
1317}
1318
1319
1320static int rtl8139_open (struct net_device *dev)
1321{
1322 struct rtl8139_private *tp = netdev_priv(dev);
1323 void __iomem *ioaddr = tp->mmio_addr;
1324 const int irq = tp->pci_dev->irq;
1325 int retval;
1326
1327 retval = request_irq(irq, handler: rtl8139_interrupt, IRQF_SHARED, name: dev->name, dev);
1328 if (retval)
1329 return retval;
1330
1331 tp->tx_bufs = dma_alloc_coherent(dev: &tp->pci_dev->dev, TX_BUF_TOT_LEN,
1332 dma_handle: &tp->tx_bufs_dma, GFP_KERNEL);
1333 tp->rx_ring = dma_alloc_coherent(dev: &tp->pci_dev->dev, RX_BUF_TOT_LEN,
1334 dma_handle: &tp->rx_ring_dma, GFP_KERNEL);
1335 if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
1336 free_irq(irq, dev);
1337
1338 if (tp->tx_bufs)
1339 dma_free_coherent(dev: &tp->pci_dev->dev, TX_BUF_TOT_LEN,
1340 cpu_addr: tp->tx_bufs, dma_handle: tp->tx_bufs_dma);
1341 if (tp->rx_ring)
1342 dma_free_coherent(dev: &tp->pci_dev->dev, RX_BUF_TOT_LEN,
1343 cpu_addr: tp->rx_ring, dma_handle: tp->rx_ring_dma);
1344
1345 return -ENOMEM;
1346
1347 }
1348
1349 napi_enable(n: &tp->napi);
1350
1351 tp->mii.full_duplex = tp->mii.force_media;
1352 tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
1353
1354 rtl8139_init_ring (dev);
1355 rtl8139_hw_start (dev);
1356 netif_start_queue (dev);
1357
1358 netif_dbg(tp, ifup, dev,
1359 "%s() ioaddr %#llx IRQ %d GP Pins %02x %s-duplex\n",
1360 __func__,
1361 (unsigned long long)pci_resource_start (tp->pci_dev, 1),
1362 irq, RTL_R8 (MediaStatus),
1363 tp->mii.full_duplex ? "full" : "half");
1364
1365 rtl8139_start_thread(tp);
1366
1367 return 0;
1368}
1369
1370
1371static void rtl_check_media (struct net_device *dev, unsigned int init_media)
1372{
1373 struct rtl8139_private *tp = netdev_priv(dev);
1374
1375 if (tp->phys[0] >= 0) {
1376 mii_check_media(mii: &tp->mii, netif_msg_link(tp), init_media);
1377 }
1378}
1379
1380/* Start the hardware at open or resume. */
1381static void rtl8139_hw_start (struct net_device *dev)
1382{
1383 struct rtl8139_private *tp = netdev_priv(dev);
1384 void __iomem *ioaddr = tp->mmio_addr;
1385 u32 i;
1386 u8 tmp;
1387
1388 /* Bring old chips out of low-power mode. */
1389 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1390 RTL_W8 (HltClk, 'R');
1391
1392 rtl8139_chip_reset (ioaddr);
1393
1394 /* unlock Config[01234] and BMCR register writes */
1395 RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1396 /* Restore our idea of the MAC address. */
1397 RTL_W32_F (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1398 RTL_W32_F (MAC0 + 4, le16_to_cpu (*(__le16 *) (dev->dev_addr + 4)));
1399
1400 tp->cur_rx = 0;
1401
1402 /* init Rx ring buffer DMA address */
1403 RTL_W32_F (RxBuf, tp->rx_ring_dma);
1404
1405 /* Must enable Tx/Rx before setting transfer thresholds! */
1406 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1407
1408 tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1409 RTL_W32 (RxConfig, tp->rx_config);
1410 RTL_W32 (TxConfig, rtl8139_tx_config);
1411
1412 rtl_check_media (dev, init_media: 1);
1413
1414 if (tp->chipset >= CH_8139B) {
1415 /* Disable magic packet scanning, which is enabled
1416 * when PM is enabled in Config1. It can be reenabled
1417 * via ETHTOOL_SWOL if desired. */
1418 RTL_W8 (Config3, RTL_R8 (Config3) & ~Cfg3_Magic);
1419 }
1420
1421 netdev_dbg(dev, "init buffer addresses\n");
1422
1423 /* Lock Config[01234] and BMCR register writes */
1424 RTL_W8 (Cfg9346, Cfg9346_Lock);
1425
1426 /* init Tx buffer DMA addresses */
1427 for (i = 0; i < NUM_TX_DESC; i++)
1428 RTL_W32_F (TxAddr0 + (i * 4), tp->tx_bufs_dma + (tp->tx_buf[i] - tp->tx_bufs));
1429
1430 RTL_W32 (RxMissed, 0);
1431
1432 rtl8139_set_rx_mode (dev);
1433
1434 /* no early-rx interrupts */
1435 RTL_W16 (MultiIntr, RTL_R16 (MultiIntr) & MultiIntrClear);
1436
1437 /* make sure RxTx has started */
1438 tmp = RTL_R8 (ChipCmd);
1439 if ((!(tmp & CmdRxEnb)) || (!(tmp & CmdTxEnb)))
1440 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1441
1442 /* Enable all known interrupts by setting the interrupt mask. */
1443 RTL_W16 (IntrMask, rtl8139_intr_mask);
1444}
1445
1446
1447/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1448static void rtl8139_init_ring (struct net_device *dev)
1449{
1450 struct rtl8139_private *tp = netdev_priv(dev);
1451 int i;
1452
1453 tp->cur_rx = 0;
1454 tp->cur_tx = 0;
1455 tp->dirty_tx = 0;
1456
1457 for (i = 0; i < NUM_TX_DESC; i++)
1458 tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
1459}
1460
1461
1462/* This must be global for CONFIG_8139TOO_TUNE_TWISTER case */
1463static int next_tick = 3 * HZ;
1464
1465#ifndef CONFIG_8139TOO_TUNE_TWISTER
1466static inline void rtl8139_tune_twister (struct net_device *dev,
1467 struct rtl8139_private *tp) {}
1468#else
1469enum TwisterParamVals {
1470 PARA78_default = 0x78fa8388,
1471 PARA7c_default = 0xcb38de43, /* param[0][3] */
1472 PARA7c_xxx = 0xcb38de43,
1473};
1474
1475static const unsigned long param[4][4] = {
1476 {0xcb39de43, 0xcb39ce43, 0xfb38de03, 0xcb38de43},
1477 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1478 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1479 {0xbb39de43, 0xbb39ce43, 0xbb39ce83, 0xbb39ce83}
1480};
1481
1482static void rtl8139_tune_twister (struct net_device *dev,
1483 struct rtl8139_private *tp)
1484{
1485 int linkcase;
1486 void __iomem *ioaddr = tp->mmio_addr;
1487
1488 /* This is a complicated state machine to configure the "twister" for
1489 impedance/echos based on the cable length.
1490 All of this is magic and undocumented.
1491 */
1492 switch (tp->twistie) {
1493 case 1:
1494 if (RTL_R16 (CSCR) & CSCR_LinkOKBit) {
1495 /* We have link beat, let us tune the twister. */
1496 RTL_W16 (CSCR, CSCR_LinkDownOffCmd);
1497 tp->twistie = 2; /* Change to state 2. */
1498 next_tick = HZ / 10;
1499 } else {
1500 /* Just put in some reasonable defaults for when beat returns. */
1501 RTL_W16 (CSCR, CSCR_LinkDownCmd);
1502 RTL_W32 (FIFOTMS, 0x20); /* Turn on cable test mode. */
1503 RTL_W32 (PARA78, PARA78_default);
1504 RTL_W32 (PARA7c, PARA7c_default);
1505 tp->twistie = 0; /* Bail from future actions. */
1506 }
1507 break;
1508 case 2:
1509 /* Read how long it took to hear the echo. */
1510 linkcase = RTL_R16 (CSCR) & CSCR_LinkStatusBits;
1511 if (linkcase == 0x7000)
1512 tp->twist_row = 3;
1513 else if (linkcase == 0x3000)
1514 tp->twist_row = 2;
1515 else if (linkcase == 0x1000)
1516 tp->twist_row = 1;
1517 else
1518 tp->twist_row = 0;
1519 tp->twist_col = 0;
1520 tp->twistie = 3; /* Change to state 2. */
1521 next_tick = HZ / 10;
1522 break;
1523 case 3:
1524 /* Put out four tuning parameters, one per 100msec. */
1525 if (tp->twist_col == 0)
1526 RTL_W16 (FIFOTMS, 0);
1527 RTL_W32 (PARA7c, param[(int) tp->twist_row]
1528 [(int) tp->twist_col]);
1529 next_tick = HZ / 10;
1530 if (++tp->twist_col >= 4) {
1531 /* For short cables we are done.
1532 For long cables (row == 3) check for mistune. */
1533 tp->twistie =
1534 (tp->twist_row == 3) ? 4 : 0;
1535 }
1536 break;
1537 case 4:
1538 /* Special case for long cables: check for mistune. */
1539 if ((RTL_R16 (CSCR) &
1540 CSCR_LinkStatusBits) == 0x7000) {
1541 tp->twistie = 0;
1542 break;
1543 } else {
1544 RTL_W32 (PARA7c, 0xfb38de03);
1545 tp->twistie = 5;
1546 next_tick = HZ / 10;
1547 }
1548 break;
1549 case 5:
1550 /* Retune for shorter cable (column 2). */
1551 RTL_W32 (FIFOTMS, 0x20);
1552 RTL_W32 (PARA78, PARA78_default);
1553 RTL_W32 (PARA7c, PARA7c_default);
1554 RTL_W32 (FIFOTMS, 0x00);
1555 tp->twist_row = 2;
1556 tp->twist_col = 0;
1557 tp->twistie = 3;
1558 next_tick = HZ / 10;
1559 break;
1560
1561 default:
1562 /* do nothing */
1563 break;
1564 }
1565}
1566#endif /* CONFIG_8139TOO_TUNE_TWISTER */
1567
1568static inline void rtl8139_thread_iter (struct net_device *dev,
1569 struct rtl8139_private *tp,
1570 void __iomem *ioaddr)
1571{
1572 int mii_lpa;
1573
1574 mii_lpa = mdio_read (dev, phy_id: tp->phys[0], MII_LPA);
1575
1576 if (!tp->mii.force_media && mii_lpa != 0xffff) {
1577 int duplex = ((mii_lpa & LPA_100FULL) ||
1578 (mii_lpa & 0x01C0) == 0x0040);
1579 if (tp->mii.full_duplex != duplex) {
1580 tp->mii.full_duplex = duplex;
1581
1582 if (mii_lpa) {
1583 netdev_info(dev, format: "Setting %s-duplex based on MII #%d link partner ability of %04x\n",
1584 tp->mii.full_duplex ? "full" : "half",
1585 tp->phys[0], mii_lpa);
1586 } else {
1587 netdev_info(dev, format: "media is unconnected, link down, or incompatible connection\n");
1588 }
1589#if 0
1590 RTL_W8 (Cfg9346, Cfg9346_Unlock);
1591 RTL_W8 (Config1, tp->mii.full_duplex ? 0x60 : 0x20);
1592 RTL_W8 (Cfg9346, Cfg9346_Lock);
1593#endif
1594 }
1595 }
1596
1597 next_tick = HZ * 60;
1598
1599 rtl8139_tune_twister (dev, tp);
1600
1601 netdev_dbg(dev, "Media selection tick, Link partner %04x\n",
1602 RTL_R16(NWayLPAR));
1603 netdev_dbg(dev, "Other registers are IntMask %04x IntStatus %04x\n",
1604 RTL_R16(IntrMask), RTL_R16(IntrStatus));
1605 netdev_dbg(dev, "Chip config %02x %02x\n",
1606 RTL_R8(Config0), RTL_R8(Config1));
1607}
1608
1609static void rtl8139_thread (struct work_struct *work)
1610{
1611 struct rtl8139_private *tp =
1612 container_of(work, struct rtl8139_private, thread.work);
1613 struct net_device *dev = tp->mii.dev;
1614 unsigned long thr_delay = next_tick;
1615
1616 rtnl_lock();
1617
1618 if (!netif_running(dev))
1619 goto out_unlock;
1620
1621 if (tp->watchdog_fired) {
1622 tp->watchdog_fired = 0;
1623 rtl8139_tx_timeout_task(work);
1624 } else
1625 rtl8139_thread_iter(dev, tp, ioaddr: tp->mmio_addr);
1626
1627 if (tp->have_thread)
1628 schedule_delayed_work(dwork: &tp->thread, delay: thr_delay);
1629out_unlock:
1630 rtnl_unlock ();
1631}
1632
1633static void rtl8139_start_thread(struct rtl8139_private *tp)
1634{
1635 tp->twistie = 0;
1636 if (tp->chipset == CH_8139_K)
1637 tp->twistie = 1;
1638 else if (tp->drv_flags & HAS_LNK_CHNG)
1639 return;
1640
1641 tp->have_thread = 1;
1642 tp->watchdog_fired = 0;
1643
1644 schedule_delayed_work(dwork: &tp->thread, delay: next_tick);
1645}
1646
1647static inline void rtl8139_tx_clear (struct rtl8139_private *tp)
1648{
1649 tp->cur_tx = 0;
1650 tp->dirty_tx = 0;
1651
1652 /* XXX account for unsent Tx packets in tp->stats.tx_dropped */
1653}
1654
1655static void rtl8139_tx_timeout_task (struct work_struct *work)
1656{
1657 struct rtl8139_private *tp =
1658 container_of(work, struct rtl8139_private, thread.work);
1659 struct net_device *dev = tp->mii.dev;
1660 void __iomem *ioaddr = tp->mmio_addr;
1661 int i;
1662 u8 tmp8;
1663
1664 napi_disable(n: &tp->napi);
1665 netif_stop_queue(dev);
1666 synchronize_rcu();
1667
1668 netdev_dbg(dev, "Transmit timeout, status %02x %04x %04x media %02x\n",
1669 RTL_R8(ChipCmd), RTL_R16(IntrStatus),
1670 RTL_R16(IntrMask), RTL_R8(MediaStatus));
1671 /* Emit info to figure out what went wrong. */
1672 netdev_dbg(dev, "Tx queue start entry %ld dirty entry %ld\n",
1673 tp->cur_tx, tp->dirty_tx);
1674 for (i = 0; i < NUM_TX_DESC; i++)
1675 netdev_dbg(dev, "Tx descriptor %d is %08x%s\n",
1676 i, RTL_R32(TxStatus0 + (i * 4)),
1677 i == tp->dirty_tx % NUM_TX_DESC ?
1678 " (queue head)" : "");
1679
1680 tp->xstats.tx_timeouts++;
1681
1682 /* disable Tx ASAP, if not already */
1683 tmp8 = RTL_R8 (ChipCmd);
1684 if (tmp8 & CmdTxEnb)
1685 RTL_W8 (ChipCmd, CmdRxEnb);
1686
1687 netdev_lock(dev);
1688 spin_lock_bh(lock: &tp->rx_lock);
1689 /* Disable interrupts by clearing the interrupt mask. */
1690 RTL_W16 (IntrMask, 0x0000);
1691
1692 /* Stop a shared interrupt from scavenging while we are. */
1693 spin_lock_irq(lock: &tp->lock);
1694 rtl8139_tx_clear (tp);
1695 spin_unlock_irq(lock: &tp->lock);
1696
1697 /* ...and finally, reset everything */
1698 napi_enable_locked(n: &tp->napi);
1699 rtl8139_hw_start(dev);
1700 netif_wake_queue(dev);
1701
1702 spin_unlock_bh(lock: &tp->rx_lock);
1703 netdev_unlock(dev);
1704}
1705
1706static void rtl8139_tx_timeout(struct net_device *dev, unsigned int txqueue)
1707{
1708 struct rtl8139_private *tp = netdev_priv(dev);
1709
1710 tp->watchdog_fired = 1;
1711 if (!tp->have_thread) {
1712 INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
1713 schedule_delayed_work(dwork: &tp->thread, delay: next_tick);
1714 }
1715}
1716
1717static netdev_tx_t rtl8139_start_xmit (struct sk_buff *skb,
1718 struct net_device *dev)
1719{
1720 struct rtl8139_private *tp = netdev_priv(dev);
1721 void __iomem *ioaddr = tp->mmio_addr;
1722 unsigned int entry;
1723 unsigned int len = skb->len;
1724 unsigned long flags;
1725
1726 /* Calculate the next Tx descriptor entry. */
1727 entry = tp->cur_tx % NUM_TX_DESC;
1728
1729 /* Note: the chip doesn't have auto-pad! */
1730 if (likely(len < TX_BUF_SIZE)) {
1731 if (len < ETH_ZLEN)
1732 memset(s: tp->tx_buf[entry], c: 0, ETH_ZLEN);
1733 skb_copy_and_csum_dev(skb, to: tp->tx_buf[entry]);
1734 dev_kfree_skb_any(skb);
1735 } else {
1736 dev_kfree_skb_any(skb);
1737 dev->stats.tx_dropped++;
1738 return NETDEV_TX_OK;
1739 }
1740
1741 spin_lock_irqsave(&tp->lock, flags);
1742 /*
1743 * Writing to TxStatus triggers a DMA transfer of the data
1744 * copied to tp->tx_buf[entry] above. Use a memory barrier
1745 * to make sure that the device sees the updated data.
1746 */
1747 wmb();
1748 RTL_W32_F (TxStatus0 + (entry * sizeof (u32)),
1749 tp->tx_flag | max(len, (unsigned int)ETH_ZLEN));
1750
1751 tp->cur_tx++;
1752
1753 if ((tp->cur_tx - NUM_TX_DESC) == tp->dirty_tx)
1754 netif_stop_queue (dev);
1755 spin_unlock_irqrestore(lock: &tp->lock, flags);
1756
1757 netif_dbg(tp, tx_queued, dev, "Queued Tx packet size %u to slot %d\n",
1758 len, entry);
1759
1760 return NETDEV_TX_OK;
1761}
1762
1763
1764static void rtl8139_tx_interrupt (struct net_device *dev,
1765 struct rtl8139_private *tp,
1766 void __iomem *ioaddr)
1767{
1768 unsigned long dirty_tx, tx_left;
1769
1770 assert (dev != NULL);
1771 assert (ioaddr != NULL);
1772
1773 dirty_tx = tp->dirty_tx;
1774 tx_left = tp->cur_tx - dirty_tx;
1775 while (tx_left > 0) {
1776 int entry = dirty_tx % NUM_TX_DESC;
1777 int txstatus;
1778
1779 txstatus = RTL_R32 (TxStatus0 + (entry * sizeof (u32)));
1780
1781 if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
1782 break; /* It still hasn't been Txed */
1783
1784 /* Note: TxCarrierLost is always asserted at 100mbps. */
1785 if (txstatus & (TxOutOfWindow | TxAborted)) {
1786 /* There was an major error, log it. */
1787 netif_dbg(tp, tx_err, dev, "Transmit error, Tx status %08x\n",
1788 txstatus);
1789 dev->stats.tx_errors++;
1790 if (txstatus & TxAborted) {
1791 dev->stats.tx_aborted_errors++;
1792 RTL_W32 (TxConfig, TxClearAbt);
1793 RTL_W16 (IntrStatus, TxErr);
1794 wmb();
1795 }
1796 if (txstatus & TxCarrierLost)
1797 dev->stats.tx_carrier_errors++;
1798 if (txstatus & TxOutOfWindow)
1799 dev->stats.tx_window_errors++;
1800 } else {
1801 if (txstatus & TxUnderrun) {
1802 /* Add 64 to the Tx FIFO threshold. */
1803 if (tp->tx_flag < 0x00300000)
1804 tp->tx_flag += 0x00020000;
1805 dev->stats.tx_fifo_errors++;
1806 }
1807 dev->stats.collisions += (txstatus >> 24) & 15;
1808 u64_stats_update_begin(syncp: &tp->tx_stats.syncp);
1809 tp->tx_stats.packets++;
1810 tp->tx_stats.bytes += txstatus & 0x7ff;
1811 u64_stats_update_end(syncp: &tp->tx_stats.syncp);
1812 }
1813
1814 dirty_tx++;
1815 tx_left--;
1816 }
1817
1818#ifndef RTL8139_NDEBUG
1819 if (tp->cur_tx - dirty_tx > NUM_TX_DESC) {
1820 netdev_err(dev, format: "Out-of-sync dirty pointer, %ld vs. %ld\n",
1821 dirty_tx, tp->cur_tx);
1822 dirty_tx += NUM_TX_DESC;
1823 }
1824#endif /* RTL8139_NDEBUG */
1825
1826 /* only wake the queue if we did work, and the queue is stopped */
1827 if (tp->dirty_tx != dirty_tx) {
1828 tp->dirty_tx = dirty_tx;
1829 mb();
1830 netif_wake_queue (dev);
1831 }
1832}
1833
1834
1835/* TODO: clean this up! Rx reset need not be this intensive */
1836static void rtl8139_rx_err (u32 rx_status, struct net_device *dev,
1837 struct rtl8139_private *tp, void __iomem *ioaddr)
1838{
1839 u8 tmp8;
1840#ifdef CONFIG_8139_OLD_RX_RESET
1841 int tmp_work;
1842#endif
1843
1844 netif_dbg(tp, rx_err, dev, "Ethernet frame had errors, status %08x\n",
1845 rx_status);
1846 dev->stats.rx_errors++;
1847 if (!(rx_status & RxStatusOK)) {
1848 if (rx_status & RxTooLong) {
1849 netdev_dbg(dev, "Oversized Ethernet frame, status %04x!\n",
1850 rx_status);
1851 /* A.C.: The chip hangs here. */
1852 }
1853 if (rx_status & (RxBadSymbol | RxBadAlign))
1854 dev->stats.rx_frame_errors++;
1855 if (rx_status & (RxRunt | RxTooLong))
1856 dev->stats.rx_length_errors++;
1857 if (rx_status & RxCRCErr)
1858 dev->stats.rx_crc_errors++;
1859 } else {
1860 tp->xstats.rx_lost_in_ring++;
1861 }
1862
1863#ifndef CONFIG_8139_OLD_RX_RESET
1864 tmp8 = RTL_R8 (ChipCmd);
1865 RTL_W8 (ChipCmd, tmp8 & ~CmdRxEnb);
1866 RTL_W8 (ChipCmd, tmp8);
1867 RTL_W32 (RxConfig, tp->rx_config);
1868 tp->cur_rx = 0;
1869#else
1870 /* Reset the receiver, based on RealTek recommendation. (Bug?) */
1871
1872 /* disable receive */
1873 RTL_W8_F (ChipCmd, CmdTxEnb);
1874 tmp_work = 200;
1875 while (--tmp_work > 0) {
1876 udelay(1);
1877 tmp8 = RTL_R8 (ChipCmd);
1878 if (!(tmp8 & CmdRxEnb))
1879 break;
1880 }
1881 if (tmp_work <= 0)
1882 netdev_warn(dev, "rx stop wait too long\n");
1883 /* restart receive */
1884 tmp_work = 200;
1885 while (--tmp_work > 0) {
1886 RTL_W8_F (ChipCmd, CmdRxEnb | CmdTxEnb);
1887 udelay(1);
1888 tmp8 = RTL_R8 (ChipCmd);
1889 if ((tmp8 & CmdRxEnb) && (tmp8 & CmdTxEnb))
1890 break;
1891 }
1892 if (tmp_work <= 0)
1893 netdev_warn(dev, "tx/rx enable wait too long\n");
1894
1895 /* and reinitialize all rx related registers */
1896 RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1897 /* Must enable Tx/Rx before setting transfer thresholds! */
1898 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1899
1900 tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1901 RTL_W32 (RxConfig, tp->rx_config);
1902 tp->cur_rx = 0;
1903
1904 netdev_dbg(dev, "init buffer addresses\n");
1905
1906 /* Lock Config[01234] and BMCR register writes */
1907 RTL_W8 (Cfg9346, Cfg9346_Lock);
1908
1909 /* init Rx ring buffer DMA address */
1910 RTL_W32_F (RxBuf, tp->rx_ring_dma);
1911
1912 /* A.C.: Reset the multicast list. */
1913 __set_rx_mode (dev);
1914#endif
1915}
1916
1917#if RX_BUF_IDX == 3
1918static inline void wrap_copy(struct sk_buff *skb, const unsigned char *ring,
1919 u32 offset, unsigned int size)
1920{
1921 u32 left = RX_BUF_LEN - offset;
1922
1923 if (size > left) {
1924 skb_copy_to_linear_data(skb, ring + offset, left);
1925 skb_copy_to_linear_data_offset(skb, left, ring, size - left);
1926 } else
1927 skb_copy_to_linear_data(skb, ring + offset, size);
1928}
1929#endif
1930
1931static void rtl8139_isr_ack(struct rtl8139_private *tp)
1932{
1933 void __iomem *ioaddr = tp->mmio_addr;
1934 u16 status;
1935
1936 status = RTL_R16 (IntrStatus) & RxAckBits;
1937
1938 /* Clear out errors and receive interrupts */
1939 if (likely(status != 0)) {
1940 if (unlikely(status & (RxFIFOOver | RxOverflow))) {
1941 tp->dev->stats.rx_errors++;
1942 if (status & RxFIFOOver)
1943 tp->dev->stats.rx_fifo_errors++;
1944 }
1945 RTL_W16_F (IntrStatus, RxAckBits);
1946 }
1947}
1948
1949static int rtl8139_rx(struct net_device *dev, struct rtl8139_private *tp,
1950 int budget)
1951{
1952 void __iomem *ioaddr = tp->mmio_addr;
1953 int received = 0;
1954 unsigned char *rx_ring = tp->rx_ring;
1955 unsigned int cur_rx = tp->cur_rx;
1956 unsigned int rx_size = 0;
1957
1958 netdev_dbg(dev, "In %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n",
1959 __func__, (u16)cur_rx,
1960 RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
1961
1962 while (netif_running(dev) && received < budget &&
1963 (RTL_R8 (ChipCmd) & RxBufEmpty) == 0) {
1964 u32 ring_offset = cur_rx % RX_BUF_LEN;
1965 u32 rx_status;
1966 unsigned int pkt_size;
1967 struct sk_buff *skb;
1968
1969 rmb();
1970
1971 /* read size+status of next frame from DMA ring buffer */
1972 rx_status = le32_to_cpu (*(__le32 *) (rx_ring + ring_offset));
1973 rx_size = rx_status >> 16;
1974 if (likely(!(dev->features & NETIF_F_RXFCS)))
1975 pkt_size = rx_size - 4;
1976 else
1977 pkt_size = rx_size;
1978
1979 netif_dbg(tp, rx_status, dev, "%s() status %04x, size %04x, cur %04x\n",
1980 __func__, rx_status, rx_size, cur_rx);
1981#if RTL8139_DEBUG > 2
1982 print_hex_dump(KERN_DEBUG, "Frame contents: ",
1983 DUMP_PREFIX_OFFSET, 16, 1,
1984 &rx_ring[ring_offset], 70, true);
1985#endif
1986
1987 /* Packet copy from FIFO still in progress.
1988 * Theoretically, this should never happen
1989 * since EarlyRx is disabled.
1990 */
1991 if (unlikely(rx_size == 0xfff0)) {
1992 if (!tp->fifo_copy_timeout)
1993 tp->fifo_copy_timeout = jiffies + 2;
1994 else if (time_after(jiffies, tp->fifo_copy_timeout)) {
1995 netdev_dbg(dev, "hung FIFO. Reset\n");
1996 rx_size = 0;
1997 goto no_early_rx;
1998 }
1999 netif_dbg(tp, intr, dev, "fifo copy in progress\n");
2000 tp->xstats.early_rx++;
2001 break;
2002 }
2003
2004no_early_rx:
2005 tp->fifo_copy_timeout = 0;
2006
2007 /* If Rx err or invalid rx_size/rx_status received
2008 * (which happens if we get lost in the ring),
2009 * Rx process gets reset, so we abort any further
2010 * Rx processing.
2011 */
2012 if (unlikely((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
2013 (rx_size < 8) ||
2014 (!(rx_status & RxStatusOK)))) {
2015 if ((dev->features & NETIF_F_RXALL) &&
2016 (rx_size <= (MAX_ETH_FRAME_SIZE + 4)) &&
2017 (rx_size >= 8) &&
2018 (!(rx_status & RxStatusOK))) {
2019 /* Length is at least mostly OK, but pkt has
2020 * error. I'm hoping we can handle some of these
2021 * errors without resetting the chip. --Ben
2022 */
2023 dev->stats.rx_errors++;
2024 if (rx_status & RxCRCErr) {
2025 dev->stats.rx_crc_errors++;
2026 goto keep_pkt;
2027 }
2028 if (rx_status & RxRunt) {
2029 dev->stats.rx_length_errors++;
2030 goto keep_pkt;
2031 }
2032 }
2033 rtl8139_rx_err (rx_status, dev, tp, ioaddr);
2034 received = -1;
2035 goto out;
2036 }
2037
2038keep_pkt:
2039 /* Malloc up new buffer, compatible with net-2e. */
2040 /* Omit the four octet CRC from the length. */
2041
2042 skb = napi_alloc_skb(napi: &tp->napi, length: pkt_size);
2043 if (likely(skb)) {
2044#if RX_BUF_IDX == 3
2045 wrap_copy(skb, rx_ring, ring_offset+4, pkt_size);
2046#else
2047 skb_copy_to_linear_data (skb, from: &rx_ring[ring_offset + 4], len: pkt_size);
2048#endif
2049 skb_put (skb, len: pkt_size);
2050
2051 skb->protocol = eth_type_trans (skb, dev);
2052
2053 u64_stats_update_begin(syncp: &tp->rx_stats.syncp);
2054 tp->rx_stats.packets++;
2055 tp->rx_stats.bytes += pkt_size;
2056 u64_stats_update_end(syncp: &tp->rx_stats.syncp);
2057
2058 netif_receive_skb (skb);
2059 } else {
2060 dev->stats.rx_dropped++;
2061 }
2062 received++;
2063
2064 cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
2065 RTL_W16 (RxBufPtr, (u16) (cur_rx - 16));
2066
2067 rtl8139_isr_ack(tp);
2068 }
2069
2070 if (unlikely(!received || rx_size == 0xfff0))
2071 rtl8139_isr_ack(tp);
2072
2073 netdev_dbg(dev, "Done %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n",
2074 __func__, cur_rx,
2075 RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
2076
2077 tp->cur_rx = cur_rx;
2078
2079 /*
2080 * The receive buffer should be mostly empty.
2081 * Tell NAPI to reenable the Rx irq.
2082 */
2083 if (tp->fifo_copy_timeout)
2084 received = budget;
2085
2086out:
2087 return received;
2088}
2089
2090
2091static void rtl8139_weird_interrupt (struct net_device *dev,
2092 struct rtl8139_private *tp,
2093 void __iomem *ioaddr,
2094 int status, int link_changed)
2095{
2096 netdev_dbg(dev, "Abnormal interrupt, status %08x\n", status);
2097
2098 assert (dev != NULL);
2099 assert (tp != NULL);
2100 assert (ioaddr != NULL);
2101
2102 /* Update the error count. */
2103 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2104 RTL_W32 (RxMissed, 0);
2105
2106 if ((status & RxUnderrun) && link_changed &&
2107 (tp->drv_flags & HAS_LNK_CHNG)) {
2108 rtl_check_media(dev, init_media: 0);
2109 status &= ~RxUnderrun;
2110 }
2111
2112 if (status & (RxUnderrun | RxErr))
2113 dev->stats.rx_errors++;
2114
2115 if (status & PCSTimeout)
2116 dev->stats.rx_length_errors++;
2117 if (status & RxUnderrun)
2118 dev->stats.rx_fifo_errors++;
2119 if (status & PCIErr) {
2120 u16 pci_cmd_status;
2121 pci_read_config_word (dev: tp->pci_dev, PCI_STATUS, val: &pci_cmd_status);
2122 pci_write_config_word (dev: tp->pci_dev, PCI_STATUS, val: pci_cmd_status);
2123
2124 netdev_err(dev, format: "PCI Bus error %04x\n", pci_cmd_status);
2125 }
2126}
2127
2128static int rtl8139_poll(struct napi_struct *napi, int budget)
2129{
2130 struct rtl8139_private *tp = container_of(napi, struct rtl8139_private, napi);
2131 struct net_device *dev = tp->dev;
2132 void __iomem *ioaddr = tp->mmio_addr;
2133 int work_done;
2134
2135 spin_lock(lock: &tp->rx_lock);
2136 work_done = 0;
2137 if (likely(RTL_R16(IntrStatus) & RxAckBits))
2138 work_done += rtl8139_rx(dev, tp, budget);
2139
2140 if (work_done < budget) {
2141 unsigned long flags;
2142
2143 spin_lock_irqsave(&tp->lock, flags);
2144 if (napi_complete_done(n: napi, work_done))
2145 RTL_W16_F(IntrMask, rtl8139_intr_mask);
2146 spin_unlock_irqrestore(lock: &tp->lock, flags);
2147 }
2148 spin_unlock(lock: &tp->rx_lock);
2149
2150 return work_done;
2151}
2152
2153/* The interrupt handler does all of the Rx thread work and cleans up
2154 after the Tx thread. */
2155static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance)
2156{
2157 struct net_device *dev = (struct net_device *) dev_instance;
2158 struct rtl8139_private *tp = netdev_priv(dev);
2159 void __iomem *ioaddr = tp->mmio_addr;
2160 u16 status, ackstat;
2161 int link_changed = 0; /* avoid bogus "uninit" warning */
2162 int handled = 0;
2163
2164 spin_lock (lock: &tp->lock);
2165 status = RTL_R16 (IntrStatus);
2166
2167 /* shared irq? */
2168 if (unlikely((status & rtl8139_intr_mask) == 0))
2169 goto out;
2170
2171 handled = 1;
2172
2173 /* h/w no longer present (hotplug?) or major error, bail */
2174 if (unlikely(status == 0xFFFF))
2175 goto out;
2176
2177 /* close possible race's with dev_close */
2178 if (unlikely(!netif_running(dev))) {
2179 RTL_W16 (IntrMask, 0);
2180 goto out;
2181 }
2182
2183 /* Acknowledge all of the current interrupt sources ASAP, but
2184 an first get an additional status bit from CSCR. */
2185 if (unlikely(status & RxUnderrun))
2186 link_changed = RTL_R16 (CSCR) & CSCR_LinkChangeBit;
2187
2188 ackstat = status & ~(RxAckBits | TxErr);
2189 if (ackstat)
2190 RTL_W16 (IntrStatus, ackstat);
2191
2192 /* Receive packets are processed by poll routine.
2193 If not running start it now. */
2194 if (status & RxAckBits){
2195 if (napi_schedule_prep(n: &tp->napi)) {
2196 RTL_W16_F (IntrMask, rtl8139_norx_intr_mask);
2197 __napi_schedule(n: &tp->napi);
2198 }
2199 }
2200
2201 /* Check uncommon events with one test. */
2202 if (unlikely(status & (PCIErr | PCSTimeout | RxUnderrun | RxErr)))
2203 rtl8139_weird_interrupt (dev, tp, ioaddr,
2204 status, link_changed);
2205
2206 if (status & (TxOK | TxErr)) {
2207 rtl8139_tx_interrupt (dev, tp, ioaddr);
2208 if (status & TxErr)
2209 RTL_W16 (IntrStatus, TxErr);
2210 }
2211 out:
2212 spin_unlock (lock: &tp->lock);
2213
2214 netdev_dbg(dev, "exiting interrupt, intr_status=%#4.4x\n",
2215 RTL_R16(IntrStatus));
2216 return IRQ_RETVAL(handled);
2217}
2218
2219#ifdef CONFIG_NET_POLL_CONTROLLER
2220/*
2221 * Polling receive - used by netconsole and other diagnostic tools
2222 * to allow network i/o with interrupts disabled.
2223 */
2224static void rtl8139_poll_controller(struct net_device *dev)
2225{
2226 struct rtl8139_private *tp = netdev_priv(dev);
2227 const int irq = tp->pci_dev->irq;
2228
2229 disable_irq_nosync(irq);
2230 rtl8139_interrupt(irq, dev_instance: dev);
2231 enable_irq(irq);
2232}
2233#endif
2234
2235static int rtl8139_set_mac_address(struct net_device *dev, void *p)
2236{
2237 struct rtl8139_private *tp = netdev_priv(dev);
2238 void __iomem *ioaddr = tp->mmio_addr;
2239 struct sockaddr *addr = p;
2240
2241 if (!is_valid_ether_addr(addr: addr->sa_data))
2242 return -EADDRNOTAVAIL;
2243
2244 eth_hw_addr_set(dev, addr: addr->sa_data);
2245
2246 spin_lock_irq(lock: &tp->lock);
2247
2248 RTL_W8_F(Cfg9346, Cfg9346_Unlock);
2249 RTL_W32_F(MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
2250 RTL_W32_F(MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
2251 RTL_W8_F(Cfg9346, Cfg9346_Lock);
2252
2253 spin_unlock_irq(lock: &tp->lock);
2254
2255 return 0;
2256}
2257
2258static int rtl8139_close (struct net_device *dev)
2259{
2260 struct rtl8139_private *tp = netdev_priv(dev);
2261 void __iomem *ioaddr = tp->mmio_addr;
2262 unsigned long flags;
2263
2264 netif_stop_queue(dev);
2265 napi_disable(n: &tp->napi);
2266
2267 netif_dbg(tp, ifdown, dev, "Shutting down ethercard, status was 0x%04x\n",
2268 RTL_R16(IntrStatus));
2269
2270 spin_lock_irqsave (&tp->lock, flags);
2271
2272 /* Stop the chip's Tx and Rx DMA processes. */
2273 RTL_W8 (ChipCmd, 0);
2274
2275 /* Disable interrupts by clearing the interrupt mask. */
2276 RTL_W16 (IntrMask, 0);
2277
2278 /* Update the error counts. */
2279 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2280 RTL_W32 (RxMissed, 0);
2281
2282 spin_unlock_irqrestore (lock: &tp->lock, flags);
2283
2284 free_irq(tp->pci_dev->irq, dev);
2285
2286 rtl8139_tx_clear (tp);
2287
2288 dma_free_coherent(dev: &tp->pci_dev->dev, RX_BUF_TOT_LEN,
2289 cpu_addr: tp->rx_ring, dma_handle: tp->rx_ring_dma);
2290 dma_free_coherent(dev: &tp->pci_dev->dev, TX_BUF_TOT_LEN,
2291 cpu_addr: tp->tx_bufs, dma_handle: tp->tx_bufs_dma);
2292 tp->rx_ring = NULL;
2293 tp->tx_bufs = NULL;
2294
2295 /* Green! Put the chip in low-power mode. */
2296 RTL_W8 (Cfg9346, Cfg9346_Unlock);
2297
2298 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
2299 RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
2300
2301 return 0;
2302}
2303
2304
2305/* Get the ethtool Wake-on-LAN settings. Assumes that wol points to
2306 kernel memory, *wol has been initialized as {ETHTOOL_GWOL}, and
2307 other threads or interrupts aren't messing with the 8139. */
2308static void rtl8139_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2309{
2310 struct rtl8139_private *tp = netdev_priv(dev);
2311 void __iomem *ioaddr = tp->mmio_addr;
2312
2313 spin_lock_irq(lock: &tp->lock);
2314 if (rtl_chip_info[tp->chipset].flags & HasLWake) {
2315 u8 cfg3 = RTL_R8 (Config3);
2316 u8 cfg5 = RTL_R8 (Config5);
2317
2318 wol->supported = WAKE_PHY | WAKE_MAGIC
2319 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
2320
2321 wol->wolopts = 0;
2322 if (cfg3 & Cfg3_LinkUp)
2323 wol->wolopts |= WAKE_PHY;
2324 if (cfg3 & Cfg3_Magic)
2325 wol->wolopts |= WAKE_MAGIC;
2326 /* (KON)FIXME: See how netdev_set_wol() handles the
2327 following constants. */
2328 if (cfg5 & Cfg5_UWF)
2329 wol->wolopts |= WAKE_UCAST;
2330 if (cfg5 & Cfg5_MWF)
2331 wol->wolopts |= WAKE_MCAST;
2332 if (cfg5 & Cfg5_BWF)
2333 wol->wolopts |= WAKE_BCAST;
2334 }
2335 spin_unlock_irq(lock: &tp->lock);
2336}
2337
2338
2339/* Set the ethtool Wake-on-LAN settings. Return 0 or -errno. Assumes
2340 that wol points to kernel memory and other threads or interrupts
2341 aren't messing with the 8139. */
2342static int rtl8139_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2343{
2344 struct rtl8139_private *tp = netdev_priv(dev);
2345 void __iomem *ioaddr = tp->mmio_addr;
2346 u32 support;
2347 u8 cfg3, cfg5;
2348
2349 support = ((rtl_chip_info[tp->chipset].flags & HasLWake)
2350 ? (WAKE_PHY | WAKE_MAGIC
2351 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST)
2352 : 0);
2353 if (wol->wolopts & ~support)
2354 return -EINVAL;
2355
2356 spin_lock_irq(lock: &tp->lock);
2357 cfg3 = RTL_R8 (Config3) & ~(Cfg3_LinkUp | Cfg3_Magic);
2358 if (wol->wolopts & WAKE_PHY)
2359 cfg3 |= Cfg3_LinkUp;
2360 if (wol->wolopts & WAKE_MAGIC)
2361 cfg3 |= Cfg3_Magic;
2362 RTL_W8 (Cfg9346, Cfg9346_Unlock);
2363 RTL_W8 (Config3, cfg3);
2364 RTL_W8 (Cfg9346, Cfg9346_Lock);
2365
2366 cfg5 = RTL_R8 (Config5) & ~(Cfg5_UWF | Cfg5_MWF | Cfg5_BWF);
2367 /* (KON)FIXME: These are untested. We may have to set the
2368 CRC0, Wakeup0 and LSBCRC0 registers too, but I have no
2369 documentation. */
2370 if (wol->wolopts & WAKE_UCAST)
2371 cfg5 |= Cfg5_UWF;
2372 if (wol->wolopts & WAKE_MCAST)
2373 cfg5 |= Cfg5_MWF;
2374 if (wol->wolopts & WAKE_BCAST)
2375 cfg5 |= Cfg5_BWF;
2376 RTL_W8 (Config5, cfg5); /* need not unlock via Cfg9346 */
2377 spin_unlock_irq(lock: &tp->lock);
2378
2379 return 0;
2380}
2381
2382static void rtl8139_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2383{
2384 struct rtl8139_private *tp = netdev_priv(dev);
2385 strscpy(info->driver, DRV_NAME, sizeof(info->driver));
2386 strscpy(info->version, DRV_VERSION, sizeof(info->version));
2387 strscpy(info->bus_info, pci_name(tp->pci_dev), sizeof(info->bus_info));
2388}
2389
2390static int rtl8139_get_link_ksettings(struct net_device *dev,
2391 struct ethtool_link_ksettings *cmd)
2392{
2393 struct rtl8139_private *tp = netdev_priv(dev);
2394 spin_lock_irq(lock: &tp->lock);
2395 mii_ethtool_get_link_ksettings(mii: &tp->mii, cmd);
2396 spin_unlock_irq(lock: &tp->lock);
2397 return 0;
2398}
2399
2400static int rtl8139_set_link_ksettings(struct net_device *dev,
2401 const struct ethtool_link_ksettings *cmd)
2402{
2403 struct rtl8139_private *tp = netdev_priv(dev);
2404 int rc;
2405 spin_lock_irq(lock: &tp->lock);
2406 rc = mii_ethtool_set_link_ksettings(mii: &tp->mii, cmd);
2407 spin_unlock_irq(lock: &tp->lock);
2408 return rc;
2409}
2410
2411static int rtl8139_nway_reset(struct net_device *dev)
2412{
2413 struct rtl8139_private *tp = netdev_priv(dev);
2414 return mii_nway_restart(mii: &tp->mii);
2415}
2416
2417static u32 rtl8139_get_link(struct net_device *dev)
2418{
2419 struct rtl8139_private *tp = netdev_priv(dev);
2420 return mii_link_ok(mii: &tp->mii);
2421}
2422
2423static u32 rtl8139_get_msglevel(struct net_device *dev)
2424{
2425 struct rtl8139_private *tp = netdev_priv(dev);
2426 return tp->msg_enable;
2427}
2428
2429static void rtl8139_set_msglevel(struct net_device *dev, u32 datum)
2430{
2431 struct rtl8139_private *tp = netdev_priv(dev);
2432 tp->msg_enable = datum;
2433}
2434
2435static int rtl8139_get_regs_len(struct net_device *dev)
2436{
2437 struct rtl8139_private *tp;
2438 /* TODO: we are too slack to do reg dumping for pio, for now */
2439 if (use_io)
2440 return 0;
2441 tp = netdev_priv(dev);
2442 return tp->regs_len;
2443}
2444
2445static void rtl8139_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
2446{
2447 struct rtl8139_private *tp;
2448
2449 /* TODO: we are too slack to do reg dumping for pio, for now */
2450 if (use_io)
2451 return;
2452 tp = netdev_priv(dev);
2453
2454 regs->version = RTL_REGS_VER;
2455
2456 spin_lock_irq(lock: &tp->lock);
2457 memcpy_fromio(regbuf, tp->mmio_addr, regs->len);
2458 spin_unlock_irq(lock: &tp->lock);
2459}
2460
2461static int rtl8139_get_sset_count(struct net_device *dev, int sset)
2462{
2463 switch (sset) {
2464 case ETH_SS_STATS:
2465 return RTL_NUM_STATS;
2466 default:
2467 return -EOPNOTSUPP;
2468 }
2469}
2470
2471static void rtl8139_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2472{
2473 struct rtl8139_private *tp = netdev_priv(dev);
2474
2475 data[0] = tp->xstats.early_rx;
2476 data[1] = tp->xstats.tx_buf_mapped;
2477 data[2] = tp->xstats.tx_timeouts;
2478 data[3] = tp->xstats.rx_lost_in_ring;
2479}
2480
2481static void rtl8139_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2482{
2483 memcpy(to: data, from: ethtool_stats_keys, len: sizeof(ethtool_stats_keys));
2484}
2485
2486static const struct ethtool_ops rtl8139_ethtool_ops = {
2487 .get_drvinfo = rtl8139_get_drvinfo,
2488 .get_regs_len = rtl8139_get_regs_len,
2489 .get_regs = rtl8139_get_regs,
2490 .nway_reset = rtl8139_nway_reset,
2491 .get_link = rtl8139_get_link,
2492 .get_msglevel = rtl8139_get_msglevel,
2493 .set_msglevel = rtl8139_set_msglevel,
2494 .get_wol = rtl8139_get_wol,
2495 .set_wol = rtl8139_set_wol,
2496 .get_strings = rtl8139_get_strings,
2497 .get_sset_count = rtl8139_get_sset_count,
2498 .get_ethtool_stats = rtl8139_get_ethtool_stats,
2499 .get_link_ksettings = rtl8139_get_link_ksettings,
2500 .set_link_ksettings = rtl8139_set_link_ksettings,
2501};
2502
2503static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2504{
2505 struct rtl8139_private *tp = netdev_priv(dev);
2506 int rc;
2507
2508 if (!netif_running(dev))
2509 return -EINVAL;
2510
2511 spin_lock_irq(lock: &tp->lock);
2512 rc = generic_mii_ioctl(mii_if: &tp->mii, mii_data: if_mii(rq), cmd, NULL);
2513 spin_unlock_irq(lock: &tp->lock);
2514
2515 return rc;
2516}
2517
2518
2519static void
2520rtl8139_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
2521{
2522 struct rtl8139_private *tp = netdev_priv(dev);
2523 void __iomem *ioaddr = tp->mmio_addr;
2524 unsigned long flags;
2525 unsigned int start;
2526
2527 if (netif_running(dev)) {
2528 spin_lock_irqsave (&tp->lock, flags);
2529 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2530 RTL_W32 (RxMissed, 0);
2531 spin_unlock_irqrestore (lock: &tp->lock, flags);
2532 }
2533
2534 netdev_stats_to_stats64(stats64: stats, netdev_stats: &dev->stats);
2535
2536 do {
2537 start = u64_stats_fetch_begin(syncp: &tp->rx_stats.syncp);
2538 stats->rx_packets = tp->rx_stats.packets;
2539 stats->rx_bytes = tp->rx_stats.bytes;
2540 } while (u64_stats_fetch_retry(syncp: &tp->rx_stats.syncp, start));
2541
2542 do {
2543 start = u64_stats_fetch_begin(syncp: &tp->tx_stats.syncp);
2544 stats->tx_packets = tp->tx_stats.packets;
2545 stats->tx_bytes = tp->tx_stats.bytes;
2546 } while (u64_stats_fetch_retry(syncp: &tp->tx_stats.syncp, start));
2547}
2548
2549/* Set or clear the multicast filter for this adaptor.
2550 This routine is not state sensitive and need not be SMP locked. */
2551
2552static void __set_rx_mode (struct net_device *dev)
2553{
2554 struct rtl8139_private *tp = netdev_priv(dev);
2555 void __iomem *ioaddr = tp->mmio_addr;
2556 u32 mc_filter[2]; /* Multicast hash filter */
2557 int rx_mode;
2558 u32 tmp;
2559
2560 netdev_dbg(dev, "rtl8139_set_rx_mode(%04x) done -- Rx config %08x\n",
2561 dev->flags, RTL_R32(RxConfig));
2562
2563 /* Note: do not reorder, GCC is clever about common statements. */
2564 if (dev->flags & IFF_PROMISC) {
2565 rx_mode =
2566 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
2567 AcceptAllPhys;
2568 mc_filter[1] = mc_filter[0] = 0xffffffff;
2569 } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
2570 (dev->flags & IFF_ALLMULTI)) {
2571 /* Too many to filter perfectly -- accept all multicasts. */
2572 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
2573 mc_filter[1] = mc_filter[0] = 0xffffffff;
2574 } else {
2575 struct netdev_hw_addr *ha;
2576 rx_mode = AcceptBroadcast | AcceptMyPhys;
2577 mc_filter[1] = mc_filter[0] = 0;
2578 netdev_for_each_mc_addr(ha, dev) {
2579 int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
2580
2581 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
2582 rx_mode |= AcceptMulticast;
2583 }
2584 }
2585
2586 if (dev->features & NETIF_F_RXALL)
2587 rx_mode |= (AcceptErr | AcceptRunt);
2588
2589 /* We can safely update without stopping the chip. */
2590 tmp = rtl8139_rx_config | rx_mode;
2591 if (tp->rx_config != tmp) {
2592 RTL_W32_F (RxConfig, tmp);
2593 tp->rx_config = tmp;
2594 }
2595 RTL_W32_F (MAR0 + 0, mc_filter[0]);
2596 RTL_W32_F (MAR0 + 4, mc_filter[1]);
2597}
2598
2599static void rtl8139_set_rx_mode (struct net_device *dev)
2600{
2601 unsigned long flags;
2602 struct rtl8139_private *tp = netdev_priv(dev);
2603
2604 spin_lock_irqsave (&tp->lock, flags);
2605 __set_rx_mode(dev);
2606 spin_unlock_irqrestore (lock: &tp->lock, flags);
2607}
2608
2609static int __maybe_unused rtl8139_suspend(struct device *device)
2610{
2611 struct net_device *dev = dev_get_drvdata(dev: device);
2612 struct rtl8139_private *tp = netdev_priv(dev);
2613 void __iomem *ioaddr = tp->mmio_addr;
2614 unsigned long flags;
2615
2616 if (!netif_running (dev))
2617 return 0;
2618
2619 netif_device_detach (dev);
2620
2621 spin_lock_irqsave (&tp->lock, flags);
2622
2623 /* Disable interrupts, stop Tx and Rx. */
2624 RTL_W16 (IntrMask, 0);
2625 RTL_W8 (ChipCmd, 0);
2626
2627 /* Update the error counts. */
2628 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2629 RTL_W32 (RxMissed, 0);
2630
2631 spin_unlock_irqrestore (lock: &tp->lock, flags);
2632
2633 return 0;
2634}
2635
2636static int __maybe_unused rtl8139_resume(struct device *device)
2637{
2638 struct net_device *dev = dev_get_drvdata(dev: device);
2639
2640 if (!netif_running (dev))
2641 return 0;
2642
2643 rtl8139_init_ring (dev);
2644 rtl8139_hw_start (dev);
2645 netif_device_attach (dev);
2646 return 0;
2647}
2648
2649static SIMPLE_DEV_PM_OPS(rtl8139_pm_ops, rtl8139_suspend, rtl8139_resume);
2650
2651static struct pci_driver rtl8139_pci_driver = {
2652 .name = DRV_NAME,
2653 .id_table = rtl8139_pci_tbl,
2654 .probe = rtl8139_init_one,
2655 .remove = rtl8139_remove_one,
2656 .driver.pm = &rtl8139_pm_ops,
2657};
2658
2659
2660static int __init rtl8139_init_module (void)
2661{
2662 /* when we're a module, we always print a version message,
2663 * even if no 8139 board is found.
2664 */
2665#ifdef MODULE
2666 pr_info(RTL8139_DRIVER_NAME "\n");
2667#endif
2668
2669 return pci_register_driver(&rtl8139_pci_driver);
2670}
2671
2672
2673static void __exit rtl8139_cleanup_module (void)
2674{
2675 pci_unregister_driver (dev: &rtl8139_pci_driver);
2676}
2677
2678
2679module_init(rtl8139_init_module);
2680module_exit(rtl8139_cleanup_module);
2681