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[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / realtek / 8139too.c
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 <asm/irq.h>
116
117 #define RTL8139_DRIVER_NAME DRV_NAME " Fast Ethernet driver " DRV_VERSION
118
119 /* Default Message level */
120 #define RTL8139_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
121 NETIF_MSG_PROBE | \
122 NETIF_MSG_LINK)
123
124
125 /* define to 1, 2 or 3 to enable copious debugging info */
126 #define RTL8139_DEBUG 0
127
128 /* define to 1 to disable lightweight runtime debugging checks */
129 #undef RTL8139_NDEBUG
130
131
132 #ifdef RTL8139_NDEBUG
133 # define assert(expr) do {} while (0)
134 #else
135 # define assert(expr) \
136 if (unlikely(!(expr))) { \
137 pr_err("Assertion failed! %s,%s,%s,line=%d\n", \
138 #expr, __FILE__, __func__, __LINE__); \
139 }
140 #endif
141
142
143 /* A few user-configurable values. */
144 /* media options */
145 #define MAX_UNITS 8
146 static int media[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
147 static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
148
149 /* Whether to use MMIO or PIO. Default to MMIO. */
150 #ifdef CONFIG_8139TOO_PIO
151 static bool use_io = true;
152 #else
153 static bool use_io = false;
154 #endif
155
156 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
157 The RTL chips use a 64 element hash table based on the Ethernet CRC. */
158 static int multicast_filter_limit = 32;
159
160 /* bitmapped message enable number */
161 static int debug = -1;
162
163 /*
164 * Receive ring size
165 * Warning: 64K ring has hardware issues and may lock up.
166 */
167 #if defined(CONFIG_SH_DREAMCAST)
168 #define RX_BUF_IDX 0 /* 8K ring */
169 #else
170 #define RX_BUF_IDX 2 /* 32K ring */
171 #endif
172 #define RX_BUF_LEN (8192 << RX_BUF_IDX)
173 #define RX_BUF_PAD 16
174 #define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
175
176 #if RX_BUF_LEN == 65536
177 #define RX_BUF_TOT_LEN RX_BUF_LEN
178 #else
179 #define RX_BUF_TOT_LEN (RX_BUF_LEN + RX_BUF_PAD + RX_BUF_WRAP_PAD)
180 #endif
181
182 /* Number of Tx descriptor registers. */
183 #define NUM_TX_DESC 4
184
185 /* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
186 #define MAX_ETH_FRAME_SIZE 1536
187
188 /* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */
189 #define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
190 #define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
191
192 /* PCI Tuning Parameters
193 Threshold is bytes transferred to chip before transmission starts. */
194 #define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */
195
196 /* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
197 #define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */
198 #define RX_DMA_BURST 7 /* Maximum PCI burst, '6' is 1024 */
199 #define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
200 #define TX_RETRY 8 /* 0-15. retries = 16 + (TX_RETRY * 16) */
201
202 /* Operational parameters that usually are not changed. */
203 /* Time in jiffies before concluding the transmitter is hung. */
204 #define TX_TIMEOUT (6*HZ)
205
206
207 enum {
208 HAS_MII_XCVR = 0x010000,
209 HAS_CHIP_XCVR = 0x020000,
210 HAS_LNK_CHNG = 0x040000,
211 };
212
213 #define RTL_NUM_STATS 4 /* number of ETHTOOL_GSTATS u64's */
214 #define RTL_REGS_VER 1 /* version of reg. data in ETHTOOL_GREGS */
215 #define RTL_MIN_IO_SIZE 0x80
216 #define RTL8139B_IO_SIZE 256
217
218 #define RTL8129_CAPS HAS_MII_XCVR
219 #define RTL8139_CAPS (HAS_CHIP_XCVR|HAS_LNK_CHNG)
220
221 typedef enum {
222 RTL8139 = 0,
223 RTL8129,
224 } board_t;
225
226
227 /* indexed by board_t, above */
228 static const struct {
229 const char *name;
230 u32 hw_flags;
231 } board_info[] = {
232 { "RealTek RTL8139", RTL8139_CAPS },
233 { "RealTek RTL8129", RTL8129_CAPS },
234 };
235
236
237 static const struct pci_device_id rtl8139_pci_tbl[] = {
238 {0x10ec, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
239 {0x10ec, 0x8138, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
240 {0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
241 {0x1500, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
242 {0x4033, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
243 {0x1186, 0x1300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
244 {0x1186, 0x1340, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
245 {0x13d1, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
246 {0x1259, 0xa117, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
247 {0x1259, 0xa11e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
248 {0x14ea, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
249 {0x14ea, 0xab07, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
250 {0x11db, 0x1234, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
251 {0x1432, 0x9130, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
252 {0x02ac, 0x1012, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
253 {0x018a, 0x0106, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
254 {0x126c, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
255 {0x1743, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
256 {0x021b, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
257
258 #ifdef CONFIG_SH_SECUREEDGE5410
259 /* Bogus 8139 silicon reports 8129 without external PROM :-( */
260 {0x10ec, 0x8129, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
261 #endif
262 #ifdef CONFIG_8139TOO_8129
263 {0x10ec, 0x8129, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8129 },
264 #endif
265
266 /* some crazy cards report invalid vendor ids like
267 * 0x0001 here. The other ids are valid and constant,
268 * so we simply don't match on the main vendor id.
269 */
270 {PCI_ANY_ID, 0x8139, 0x10ec, 0x8139, 0, 0, RTL8139 },
271 {PCI_ANY_ID, 0x8139, 0x1186, 0x1300, 0, 0, RTL8139 },
272 {PCI_ANY_ID, 0x8139, 0x13d1, 0xab06, 0, 0, RTL8139 },
273
274 {0,}
275 };
276 MODULE_DEVICE_TABLE (pci, rtl8139_pci_tbl);
277
278 static struct {
279 const char str[ETH_GSTRING_LEN];
280 } ethtool_stats_keys[] = {
281 { "early_rx" },
282 { "tx_buf_mapped" },
283 { "tx_timeouts" },
284 { "rx_lost_in_ring" },
285 };
286
287 /* The rest of these values should never change. */
288
289 /* Symbolic offsets to registers. */
290 enum RTL8139_registers {
291 MAC0 = 0, /* Ethernet hardware address. */
292 MAR0 = 8, /* Multicast filter. */
293 TxStatus0 = 0x10, /* Transmit status (Four 32bit registers). */
294 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
295 RxBuf = 0x30,
296 ChipCmd = 0x37,
297 RxBufPtr = 0x38,
298 RxBufAddr = 0x3A,
299 IntrMask = 0x3C,
300 IntrStatus = 0x3E,
301 TxConfig = 0x40,
302 RxConfig = 0x44,
303 Timer = 0x48, /* A general-purpose counter. */
304 RxMissed = 0x4C, /* 24 bits valid, write clears. */
305 Cfg9346 = 0x50,
306 Config0 = 0x51,
307 Config1 = 0x52,
308 TimerInt = 0x54,
309 MediaStatus = 0x58,
310 Config3 = 0x59,
311 Config4 = 0x5A, /* absent on RTL-8139A */
312 HltClk = 0x5B,
313 MultiIntr = 0x5C,
314 TxSummary = 0x60,
315 BasicModeCtrl = 0x62,
316 BasicModeStatus = 0x64,
317 NWayAdvert = 0x66,
318 NWayLPAR = 0x68,
319 NWayExpansion = 0x6A,
320 /* Undocumented registers, but required for proper operation. */
321 FIFOTMS = 0x70, /* FIFO Control and test. */
322 CSCR = 0x74, /* Chip Status and Configuration Register. */
323 PARA78 = 0x78,
324 FlashReg = 0xD4, /* Communication with Flash ROM, four bytes. */
325 PARA7c = 0x7c, /* Magic transceiver parameter register. */
326 Config5 = 0xD8, /* absent on RTL-8139A */
327 };
328
329 enum ClearBitMasks {
330 MultiIntrClear = 0xF000,
331 ChipCmdClear = 0xE2,
332 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
333 };
334
335 enum ChipCmdBits {
336 CmdReset = 0x10,
337 CmdRxEnb = 0x08,
338 CmdTxEnb = 0x04,
339 RxBufEmpty = 0x01,
340 };
341
342 /* Interrupt register bits, using my own meaningful names. */
343 enum IntrStatusBits {
344 PCIErr = 0x8000,
345 PCSTimeout = 0x4000,
346 RxFIFOOver = 0x40,
347 RxUnderrun = 0x20,
348 RxOverflow = 0x10,
349 TxErr = 0x08,
350 TxOK = 0x04,
351 RxErr = 0x02,
352 RxOK = 0x01,
353
354 RxAckBits = RxFIFOOver | RxOverflow | RxOK,
355 };
356
357 enum TxStatusBits {
358 TxHostOwns = 0x2000,
359 TxUnderrun = 0x4000,
360 TxStatOK = 0x8000,
361 TxOutOfWindow = 0x20000000,
362 TxAborted = 0x40000000,
363 TxCarrierLost = 0x80000000,
364 };
365 enum RxStatusBits {
366 RxMulticast = 0x8000,
367 RxPhysical = 0x4000,
368 RxBroadcast = 0x2000,
369 RxBadSymbol = 0x0020,
370 RxRunt = 0x0010,
371 RxTooLong = 0x0008,
372 RxCRCErr = 0x0004,
373 RxBadAlign = 0x0002,
374 RxStatusOK = 0x0001,
375 };
376
377 /* Bits in RxConfig. */
378 enum rx_mode_bits {
379 AcceptErr = 0x20,
380 AcceptRunt = 0x10,
381 AcceptBroadcast = 0x08,
382 AcceptMulticast = 0x04,
383 AcceptMyPhys = 0x02,
384 AcceptAllPhys = 0x01,
385 };
386
387 /* Bits in TxConfig. */
388 enum tx_config_bits {
389 /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
390 TxIFGShift = 24,
391 TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
392 TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
393 TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
394 TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
395
396 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
397 TxCRC = (1 << 16), /* DISABLE Tx pkt CRC append */
398 TxClearAbt = (1 << 0), /* Clear abort (WO) */
399 TxDMAShift = 8, /* DMA burst value (0-7) is shifted X many bits */
400 TxRetryShift = 4, /* TXRR value (0-15) is shifted X many bits */
401
402 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
403 };
404
405 /* Bits in Config1 */
406 enum Config1Bits {
407 Cfg1_PM_Enable = 0x01,
408 Cfg1_VPD_Enable = 0x02,
409 Cfg1_PIO = 0x04,
410 Cfg1_MMIO = 0x08,
411 LWAKE = 0x10, /* not on 8139, 8139A */
412 Cfg1_Driver_Load = 0x20,
413 Cfg1_LED0 = 0x40,
414 Cfg1_LED1 = 0x80,
415 SLEEP = (1 << 1), /* only on 8139, 8139A */
416 PWRDN = (1 << 0), /* only on 8139, 8139A */
417 };
418
419 /* Bits in Config3 */
420 enum Config3Bits {
421 Cfg3_FBtBEn = (1 << 0), /* 1 = Fast Back to Back */
422 Cfg3_FuncRegEn = (1 << 1), /* 1 = enable CardBus Function registers */
423 Cfg3_CLKRUN_En = (1 << 2), /* 1 = enable CLKRUN */
424 Cfg3_CardB_En = (1 << 3), /* 1 = enable CardBus registers */
425 Cfg3_LinkUp = (1 << 4), /* 1 = wake up on link up */
426 Cfg3_Magic = (1 << 5), /* 1 = wake up on Magic Packet (tm) */
427 Cfg3_PARM_En = (1 << 6), /* 0 = software can set twister parameters */
428 Cfg3_GNTSel = (1 << 7), /* 1 = delay 1 clock from PCI GNT signal */
429 };
430
431 /* Bits in Config4 */
432 enum Config4Bits {
433 LWPTN = (1 << 2), /* not on 8139, 8139A */
434 };
435
436 /* Bits in Config5 */
437 enum Config5Bits {
438 Cfg5_PME_STS = (1 << 0), /* 1 = PCI reset resets PME_Status */
439 Cfg5_LANWake = (1 << 1), /* 1 = enable LANWake signal */
440 Cfg5_LDPS = (1 << 2), /* 0 = save power when link is down */
441 Cfg5_FIFOAddrPtr= (1 << 3), /* Realtek internal SRAM testing */
442 Cfg5_UWF = (1 << 4), /* 1 = accept unicast wakeup frame */
443 Cfg5_MWF = (1 << 5), /* 1 = accept multicast wakeup frame */
444 Cfg5_BWF = (1 << 6), /* 1 = accept broadcast wakeup frame */
445 };
446
447 enum RxConfigBits {
448 /* rx fifo threshold */
449 RxCfgFIFOShift = 13,
450 RxCfgFIFONone = (7 << RxCfgFIFOShift),
451
452 /* Max DMA burst */
453 RxCfgDMAShift = 8,
454 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
455
456 /* rx ring buffer length */
457 RxCfgRcv8K = 0,
458 RxCfgRcv16K = (1 << 11),
459 RxCfgRcv32K = (1 << 12),
460 RxCfgRcv64K = (1 << 11) | (1 << 12),
461
462 /* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
463 RxNoWrap = (1 << 7),
464 };
465
466 /* Twister tuning parameters from RealTek.
467 Completely undocumented, but required to tune bad links on some boards. */
468 enum CSCRBits {
469 CSCR_LinkOKBit = 0x0400,
470 CSCR_LinkChangeBit = 0x0800,
471 CSCR_LinkStatusBits = 0x0f000,
472 CSCR_LinkDownOffCmd = 0x003c0,
473 CSCR_LinkDownCmd = 0x0f3c0,
474 };
475
476 enum Cfg9346Bits {
477 Cfg9346_Lock = 0x00,
478 Cfg9346_Unlock = 0xC0,
479 };
480
481 typedef enum {
482 CH_8139 = 0,
483 CH_8139_K,
484 CH_8139A,
485 CH_8139A_G,
486 CH_8139B,
487 CH_8130,
488 CH_8139C,
489 CH_8100,
490 CH_8100B_8139D,
491 CH_8101,
492 } chip_t;
493
494 enum chip_flags {
495 HasHltClk = (1 << 0),
496 HasLWake = (1 << 1),
497 };
498
499 #define HW_REVID(b30, b29, b28, b27, b26, b23, b22) \
500 (b30<<30 | b29<<29 | b28<<28 | b27<<27 | b26<<26 | b23<<23 | b22<<22)
501 #define HW_REVID_MASK HW_REVID(1, 1, 1, 1, 1, 1, 1)
502
503 /* directly indexed by chip_t, above */
504 static const struct {
505 const char *name;
506 u32 version; /* from RTL8139C/RTL8139D docs */
507 u32 flags;
508 } rtl_chip_info[] = {
509 { "RTL-8139",
510 HW_REVID(1, 0, 0, 0, 0, 0, 0),
511 HasHltClk,
512 },
513
514 { "RTL-8139 rev K",
515 HW_REVID(1, 1, 0, 0, 0, 0, 0),
516 HasHltClk,
517 },
518
519 { "RTL-8139A",
520 HW_REVID(1, 1, 1, 0, 0, 0, 0),
521 HasHltClk, /* XXX undocumented? */
522 },
523
524 { "RTL-8139A rev G",
525 HW_REVID(1, 1, 1, 0, 0, 1, 0),
526 HasHltClk, /* XXX undocumented? */
527 },
528
529 { "RTL-8139B",
530 HW_REVID(1, 1, 1, 1, 0, 0, 0),
531 HasLWake,
532 },
533
534 { "RTL-8130",
535 HW_REVID(1, 1, 1, 1, 1, 0, 0),
536 HasLWake,
537 },
538
539 { "RTL-8139C",
540 HW_REVID(1, 1, 1, 0, 1, 0, 0),
541 HasLWake,
542 },
543
544 { "RTL-8100",
545 HW_REVID(1, 1, 1, 1, 0, 1, 0),
546 HasLWake,
547 },
548
549 { "RTL-8100B/8139D",
550 HW_REVID(1, 1, 1, 0, 1, 0, 1),
551 HasHltClk /* XXX undocumented? */
552 | HasLWake,
553 },
554
555 { "RTL-8101",
556 HW_REVID(1, 1, 1, 0, 1, 1, 1),
557 HasLWake,
558 },
559 };
560
561 struct rtl_extra_stats {
562 unsigned long early_rx;
563 unsigned long tx_buf_mapped;
564 unsigned long tx_timeouts;
565 unsigned long rx_lost_in_ring;
566 };
567
568 struct rtl8139_stats {
569 u64 packets;
570 u64 bytes;
571 struct u64_stats_sync syncp;
572 };
573
574 struct rtl8139_private {
575 void __iomem *mmio_addr;
576 int drv_flags;
577 struct pci_dev *pci_dev;
578 u32 msg_enable;
579 struct napi_struct napi;
580 struct net_device *dev;
581
582 unsigned char *rx_ring;
583 unsigned int cur_rx; /* RX buf index of next pkt */
584 struct rtl8139_stats rx_stats;
585 dma_addr_t rx_ring_dma;
586
587 unsigned int tx_flag;
588 unsigned long cur_tx;
589 unsigned long dirty_tx;
590 struct rtl8139_stats tx_stats;
591 unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
592 unsigned char *tx_bufs; /* Tx bounce buffer region. */
593 dma_addr_t tx_bufs_dma;
594
595 signed char phys[4]; /* MII device addresses. */
596
597 /* Twister tune state. */
598 char twistie, twist_row, twist_col;
599
600 unsigned int watchdog_fired : 1;
601 unsigned int default_port : 4; /* Last dev->if_port value. */
602 unsigned int have_thread : 1;
603
604 spinlock_t lock;
605 spinlock_t rx_lock;
606
607 chip_t chipset;
608 u32 rx_config;
609 struct rtl_extra_stats xstats;
610
611 struct delayed_work thread;
612
613 struct mii_if_info mii;
614 unsigned int regs_len;
615 unsigned long fifo_copy_timeout;
616 };
617
618 MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
619 MODULE_DESCRIPTION ("RealTek RTL-8139 Fast Ethernet driver");
620 MODULE_LICENSE("GPL");
621 MODULE_VERSION(DRV_VERSION);
622
623 module_param(use_io, bool, 0);
624 MODULE_PARM_DESC(use_io, "Force use of I/O access mode. 0=MMIO 1=PIO");
625 module_param(multicast_filter_limit, int, 0);
626 module_param_array(media, int, NULL, 0);
627 module_param_array(full_duplex, int, NULL, 0);
628 module_param(debug, int, 0);
629 MODULE_PARM_DESC (debug, "8139too bitmapped message enable number");
630 MODULE_PARM_DESC (multicast_filter_limit, "8139too maximum number of filtered multicast addresses");
631 MODULE_PARM_DESC (media, "8139too: Bits 4+9: force full duplex, bit 5: 100Mbps");
632 MODULE_PARM_DESC (full_duplex, "8139too: Force full duplex for board(s) (1)");
633
634 static int read_eeprom (void __iomem *ioaddr, int location, int addr_len);
635 static int rtl8139_open (struct net_device *dev);
636 static int mdio_read (struct net_device *dev, int phy_id, int location);
637 static void mdio_write (struct net_device *dev, int phy_id, int location,
638 int val);
639 static void rtl8139_start_thread(struct rtl8139_private *tp);
640 static void rtl8139_tx_timeout (struct net_device *dev);
641 static void rtl8139_init_ring (struct net_device *dev);
642 static netdev_tx_t rtl8139_start_xmit (struct sk_buff *skb,
643 struct net_device *dev);
644 #ifdef CONFIG_NET_POLL_CONTROLLER
645 static void rtl8139_poll_controller(struct net_device *dev);
646 #endif
647 static int rtl8139_set_mac_address(struct net_device *dev, void *p);
648 static int rtl8139_poll(struct napi_struct *napi, int budget);
649 static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance);
650 static int rtl8139_close (struct net_device *dev);
651 static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
652 static struct rtnl_link_stats64 *rtl8139_get_stats64(struct net_device *dev,
653 struct rtnl_link_stats64
654 *stats);
655 static void rtl8139_set_rx_mode (struct net_device *dev);
656 static void __set_rx_mode (struct net_device *dev);
657 static void rtl8139_hw_start (struct net_device *dev);
658 static void rtl8139_thread (struct work_struct *work);
659 static void rtl8139_tx_timeout_task(struct work_struct *work);
660 static const struct ethtool_ops rtl8139_ethtool_ops;
661
662 /* write MMIO register, with flush */
663 /* Flush avoids rtl8139 bug w/ posted MMIO writes */
664 #define RTL_W8_F(reg, val8) do { iowrite8 ((val8), ioaddr + (reg)); ioread8 (ioaddr + (reg)); } while (0)
665 #define RTL_W16_F(reg, val16) do { iowrite16 ((val16), ioaddr + (reg)); ioread16 (ioaddr + (reg)); } while (0)
666 #define RTL_W32_F(reg, val32) do { iowrite32 ((val32), ioaddr + (reg)); ioread32 (ioaddr + (reg)); } while (0)
667
668 /* write MMIO register */
669 #define RTL_W8(reg, val8) iowrite8 ((val8), ioaddr + (reg))
670 #define RTL_W16(reg, val16) iowrite16 ((val16), ioaddr + (reg))
671 #define RTL_W32(reg, val32) iowrite32 ((val32), ioaddr + (reg))
672
673 /* read MMIO register */
674 #define RTL_R8(reg) ioread8 (ioaddr + (reg))
675 #define RTL_R16(reg) ioread16 (ioaddr + (reg))
676 #define RTL_R32(reg) ioread32 (ioaddr + (reg))
677
678
679 static const u16 rtl8139_intr_mask =
680 PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
681 TxErr | TxOK | RxErr | RxOK;
682
683 static const u16 rtl8139_norx_intr_mask =
684 PCIErr | PCSTimeout | RxUnderrun |
685 TxErr | TxOK | RxErr ;
686
687 #if RX_BUF_IDX == 0
688 static const unsigned int rtl8139_rx_config =
689 RxCfgRcv8K | RxNoWrap |
690 (RX_FIFO_THRESH << RxCfgFIFOShift) |
691 (RX_DMA_BURST << RxCfgDMAShift);
692 #elif RX_BUF_IDX == 1
693 static const unsigned int rtl8139_rx_config =
694 RxCfgRcv16K | RxNoWrap |
695 (RX_FIFO_THRESH << RxCfgFIFOShift) |
696 (RX_DMA_BURST << RxCfgDMAShift);
697 #elif RX_BUF_IDX == 2
698 static const unsigned int rtl8139_rx_config =
699 RxCfgRcv32K | RxNoWrap |
700 (RX_FIFO_THRESH << RxCfgFIFOShift) |
701 (RX_DMA_BURST << RxCfgDMAShift);
702 #elif RX_BUF_IDX == 3
703 static const unsigned int rtl8139_rx_config =
704 RxCfgRcv64K |
705 (RX_FIFO_THRESH << RxCfgFIFOShift) |
706 (RX_DMA_BURST << RxCfgDMAShift);
707 #else
708 #error "Invalid configuration for 8139_RXBUF_IDX"
709 #endif
710
711 static const unsigned int rtl8139_tx_config =
712 TxIFG96 | (TX_DMA_BURST << TxDMAShift) | (TX_RETRY << TxRetryShift);
713
714 static void __rtl8139_cleanup_dev (struct net_device *dev)
715 {
716 struct rtl8139_private *tp = netdev_priv(dev);
717 struct pci_dev *pdev;
718
719 assert (dev != NULL);
720 assert (tp->pci_dev != NULL);
721 pdev = tp->pci_dev;
722
723 if (tp->mmio_addr)
724 pci_iounmap (pdev, tp->mmio_addr);
725
726 /* it's ok to call this even if we have no regions to free */
727 pci_release_regions (pdev);
728
729 free_netdev(dev);
730 }
731
732
733 static void rtl8139_chip_reset (void __iomem *ioaddr)
734 {
735 int i;
736
737 /* Soft reset the chip. */
738 RTL_W8 (ChipCmd, CmdReset);
739
740 /* Check that the chip has finished the reset. */
741 for (i = 1000; i > 0; i--) {
742 barrier();
743 if ((RTL_R8 (ChipCmd) & CmdReset) == 0)
744 break;
745 udelay (10);
746 }
747 }
748
749
750 static struct net_device *rtl8139_init_board(struct pci_dev *pdev)
751 {
752 struct device *d = &pdev->dev;
753 void __iomem *ioaddr;
754 struct net_device *dev;
755 struct rtl8139_private *tp;
756 u8 tmp8;
757 int rc, disable_dev_on_err = 0;
758 unsigned int i, bar;
759 unsigned long io_len;
760 u32 version;
761 static const struct {
762 unsigned long mask;
763 char *type;
764 } res[] = {
765 { IORESOURCE_IO, "PIO" },
766 { IORESOURCE_MEM, "MMIO" }
767 };
768
769 assert (pdev != NULL);
770
771 /* dev and priv zeroed in alloc_etherdev */
772 dev = alloc_etherdev (sizeof (*tp));
773 if (dev == NULL)
774 return ERR_PTR(-ENOMEM);
775
776 SET_NETDEV_DEV(dev, &pdev->dev);
777
778 tp = netdev_priv(dev);
779 tp->pci_dev = pdev;
780
781 /* enable device (incl. PCI PM wakeup and hotplug setup) */
782 rc = pci_enable_device (pdev);
783 if (rc)
784 goto err_out;
785
786 rc = pci_request_regions (pdev, DRV_NAME);
787 if (rc)
788 goto err_out;
789 disable_dev_on_err = 1;
790
791 pci_set_master (pdev);
792
793 u64_stats_init(&tp->rx_stats.syncp);
794 u64_stats_init(&tp->tx_stats.syncp);
795
796 retry:
797 /* PIO bar register comes first. */
798 bar = !use_io;
799
800 io_len = pci_resource_len(pdev, bar);
801
802 dev_dbg(d, "%s region size = 0x%02lX\n", res[bar].type, io_len);
803
804 if (!(pci_resource_flags(pdev, bar) & res[bar].mask)) {
805 dev_err(d, "region #%d not a %s resource, aborting\n", bar,
806 res[bar].type);
807 rc = -ENODEV;
808 goto err_out;
809 }
810 if (io_len < RTL_MIN_IO_SIZE) {
811 dev_err(d, "Invalid PCI %s region size(s), aborting\n",
812 res[bar].type);
813 rc = -ENODEV;
814 goto err_out;
815 }
816
817 ioaddr = pci_iomap(pdev, bar, 0);
818 if (!ioaddr) {
819 dev_err(d, "cannot map %s\n", res[bar].type);
820 if (!use_io) {
821 use_io = true;
822 goto retry;
823 }
824 rc = -ENODEV;
825 goto err_out;
826 }
827 tp->regs_len = io_len;
828 tp->mmio_addr = ioaddr;
829
830 /* Bring old chips out of low-power mode. */
831 RTL_W8 (HltClk, 'R');
832
833 /* check for missing/broken hardware */
834 if (RTL_R32 (TxConfig) == 0xFFFFFFFF) {
835 dev_err(&pdev->dev, "Chip not responding, ignoring board\n");
836 rc = -EIO;
837 goto err_out;
838 }
839
840 /* identify chip attached to board */
841 version = RTL_R32 (TxConfig) & HW_REVID_MASK;
842 for (i = 0; i < ARRAY_SIZE (rtl_chip_info); i++)
843 if (version == rtl_chip_info[i].version) {
844 tp->chipset = i;
845 goto match;
846 }
847
848 /* if unknown chip, assume array element #0, original RTL-8139 in this case */
849 i = 0;
850 dev_dbg(&pdev->dev, "unknown chip version, assuming RTL-8139\n");
851 dev_dbg(&pdev->dev, "TxConfig = 0x%x\n", RTL_R32 (TxConfig));
852 tp->chipset = 0;
853
854 match:
855 pr_debug("chipset id (%d) == index %d, '%s'\n",
856 version, i, rtl_chip_info[i].name);
857
858 if (tp->chipset >= CH_8139B) {
859 u8 new_tmp8 = tmp8 = RTL_R8 (Config1);
860 pr_debug("PCI PM wakeup\n");
861 if ((rtl_chip_info[tp->chipset].flags & HasLWake) &&
862 (tmp8 & LWAKE))
863 new_tmp8 &= ~LWAKE;
864 new_tmp8 |= Cfg1_PM_Enable;
865 if (new_tmp8 != tmp8) {
866 RTL_W8 (Cfg9346, Cfg9346_Unlock);
867 RTL_W8 (Config1, tmp8);
868 RTL_W8 (Cfg9346, Cfg9346_Lock);
869 }
870 if (rtl_chip_info[tp->chipset].flags & HasLWake) {
871 tmp8 = RTL_R8 (Config4);
872 if (tmp8 & LWPTN) {
873 RTL_W8 (Cfg9346, Cfg9346_Unlock);
874 RTL_W8 (Config4, tmp8 & ~LWPTN);
875 RTL_W8 (Cfg9346, Cfg9346_Lock);
876 }
877 }
878 } else {
879 pr_debug("Old chip wakeup\n");
880 tmp8 = RTL_R8 (Config1);
881 tmp8 &= ~(SLEEP | PWRDN);
882 RTL_W8 (Config1, tmp8);
883 }
884
885 rtl8139_chip_reset (ioaddr);
886
887 return dev;
888
889 err_out:
890 __rtl8139_cleanup_dev (dev);
891 if (disable_dev_on_err)
892 pci_disable_device (pdev);
893 return ERR_PTR(rc);
894 }
895
896 static int rtl8139_set_features(struct net_device *dev, netdev_features_t features)
897 {
898 struct rtl8139_private *tp = netdev_priv(dev);
899 unsigned long flags;
900 netdev_features_t changed = features ^ dev->features;
901 void __iomem *ioaddr = tp->mmio_addr;
902
903 if (!(changed & (NETIF_F_RXALL)))
904 return 0;
905
906 spin_lock_irqsave(&tp->lock, flags);
907
908 if (changed & NETIF_F_RXALL) {
909 int rx_mode = tp->rx_config;
910 if (features & NETIF_F_RXALL)
911 rx_mode |= (AcceptErr | AcceptRunt);
912 else
913 rx_mode &= ~(AcceptErr | AcceptRunt);
914 tp->rx_config = rtl8139_rx_config | rx_mode;
915 RTL_W32_F(RxConfig, tp->rx_config);
916 }
917
918 spin_unlock_irqrestore(&tp->lock, flags);
919
920 return 0;
921 }
922
923 static const struct net_device_ops rtl8139_netdev_ops = {
924 .ndo_open = rtl8139_open,
925 .ndo_stop = rtl8139_close,
926 .ndo_get_stats64 = rtl8139_get_stats64,
927 .ndo_change_mtu = eth_change_mtu,
928 .ndo_validate_addr = eth_validate_addr,
929 .ndo_set_mac_address = rtl8139_set_mac_address,
930 .ndo_start_xmit = rtl8139_start_xmit,
931 .ndo_set_rx_mode = rtl8139_set_rx_mode,
932 .ndo_do_ioctl = netdev_ioctl,
933 .ndo_tx_timeout = rtl8139_tx_timeout,
934 #ifdef CONFIG_NET_POLL_CONTROLLER
935 .ndo_poll_controller = rtl8139_poll_controller,
936 #endif
937 .ndo_set_features = rtl8139_set_features,
938 };
939
940 static int rtl8139_init_one(struct pci_dev *pdev,
941 const struct pci_device_id *ent)
942 {
943 struct net_device *dev = NULL;
944 struct rtl8139_private *tp;
945 int i, addr_len, option;
946 void __iomem *ioaddr;
947 static int board_idx = -1;
948
949 assert (pdev != NULL);
950 assert (ent != NULL);
951
952 board_idx++;
953
954 /* when we're built into the kernel, the driver version message
955 * is only printed if at least one 8139 board has been found
956 */
957 #ifndef MODULE
958 {
959 static int printed_version;
960 if (!printed_version++)
961 pr_info(RTL8139_DRIVER_NAME "\n");
962 }
963 #endif
964
965 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
966 pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pdev->revision >= 0x20) {
967 dev_info(&pdev->dev,
968 "This (id %04x:%04x rev %02x) is an enhanced 8139C+ chip, use 8139cp\n",
969 pdev->vendor, pdev->device, pdev->revision);
970 return -ENODEV;
971 }
972
973 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
974 pdev->device == PCI_DEVICE_ID_REALTEK_8139 &&
975 pdev->subsystem_vendor == PCI_VENDOR_ID_ATHEROS &&
976 pdev->subsystem_device == PCI_DEVICE_ID_REALTEK_8139) {
977 pr_info("OQO Model 2 detected. Forcing PIO\n");
978 use_io = 1;
979 }
980
981 dev = rtl8139_init_board (pdev);
982 if (IS_ERR(dev))
983 return PTR_ERR(dev);
984
985 assert (dev != NULL);
986 tp = netdev_priv(dev);
987 tp->dev = dev;
988
989 ioaddr = tp->mmio_addr;
990 assert (ioaddr != NULL);
991
992 addr_len = read_eeprom (ioaddr, 0, 8) == 0x8129 ? 8 : 6;
993 for (i = 0; i < 3; i++)
994 ((__le16 *) (dev->dev_addr))[i] =
995 cpu_to_le16(read_eeprom (ioaddr, i + 7, addr_len));
996
997 /* The Rtl8139-specific entries in the device structure. */
998 dev->netdev_ops = &rtl8139_netdev_ops;
999 dev->ethtool_ops = &rtl8139_ethtool_ops;
1000 dev->watchdog_timeo = TX_TIMEOUT;
1001 netif_napi_add(dev, &tp->napi, rtl8139_poll, 64);
1002
1003 /* note: the hardware is not capable of sg/csum/highdma, however
1004 * through the use of skb_copy_and_csum_dev we enable these
1005 * features
1006 */
1007 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
1008 dev->vlan_features = dev->features;
1009
1010 dev->hw_features |= NETIF_F_RXALL;
1011 dev->hw_features |= NETIF_F_RXFCS;
1012
1013 /* tp zeroed and aligned in alloc_etherdev */
1014 tp = netdev_priv(dev);
1015
1016 /* note: tp->chipset set in rtl8139_init_board */
1017 tp->drv_flags = board_info[ent->driver_data].hw_flags;
1018 tp->mmio_addr = ioaddr;
1019 tp->msg_enable =
1020 (debug < 0 ? RTL8139_DEF_MSG_ENABLE : ((1 << debug) - 1));
1021 spin_lock_init (&tp->lock);
1022 spin_lock_init (&tp->rx_lock);
1023 INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
1024 tp->mii.dev = dev;
1025 tp->mii.mdio_read = mdio_read;
1026 tp->mii.mdio_write = mdio_write;
1027 tp->mii.phy_id_mask = 0x3f;
1028 tp->mii.reg_num_mask = 0x1f;
1029
1030 /* dev is fully set up and ready to use now */
1031 pr_debug("about to register device named %s (%p)...\n",
1032 dev->name, dev);
1033 i = register_netdev (dev);
1034 if (i) goto err_out;
1035
1036 pci_set_drvdata (pdev, dev);
1037
1038 netdev_info(dev, "%s at 0x%p, %pM, IRQ %d\n",
1039 board_info[ent->driver_data].name,
1040 ioaddr, dev->dev_addr, pdev->irq);
1041
1042 netdev_dbg(dev, "Identified 8139 chip type '%s'\n",
1043 rtl_chip_info[tp->chipset].name);
1044
1045 /* Find the connected MII xcvrs.
1046 Doing this in open() would allow detecting external xcvrs later, but
1047 takes too much time. */
1048 #ifdef CONFIG_8139TOO_8129
1049 if (tp->drv_flags & HAS_MII_XCVR) {
1050 int phy, phy_idx = 0;
1051 for (phy = 0; phy < 32 && phy_idx < sizeof(tp->phys); phy++) {
1052 int mii_status = mdio_read(dev, phy, 1);
1053 if (mii_status != 0xffff && mii_status != 0x0000) {
1054 u16 advertising = mdio_read(dev, phy, 4);
1055 tp->phys[phy_idx++] = phy;
1056 netdev_info(dev, "MII transceiver %d status 0x%04x advertising %04x\n",
1057 phy, mii_status, advertising);
1058 }
1059 }
1060 if (phy_idx == 0) {
1061 netdev_info(dev, "No MII transceivers found! Assuming SYM transceiver\n");
1062 tp->phys[0] = 32;
1063 }
1064 } else
1065 #endif
1066 tp->phys[0] = 32;
1067 tp->mii.phy_id = tp->phys[0];
1068
1069 /* The lower four bits are the media type. */
1070 option = (board_idx >= MAX_UNITS) ? 0 : media[board_idx];
1071 if (option > 0) {
1072 tp->mii.full_duplex = (option & 0x210) ? 1 : 0;
1073 tp->default_port = option & 0xFF;
1074 if (tp->default_port)
1075 tp->mii.force_media = 1;
1076 }
1077 if (board_idx < MAX_UNITS && full_duplex[board_idx] > 0)
1078 tp->mii.full_duplex = full_duplex[board_idx];
1079 if (tp->mii.full_duplex) {
1080 netdev_info(dev, "Media type forced to Full Duplex\n");
1081 /* Changing the MII-advertised media because might prevent
1082 re-connection. */
1083 tp->mii.force_media = 1;
1084 }
1085 if (tp->default_port) {
1086 netdev_info(dev, " Forcing %dMbps %s-duplex operation\n",
1087 (option & 0x20 ? 100 : 10),
1088 (option & 0x10 ? "full" : "half"));
1089 mdio_write(dev, tp->phys[0], 0,
1090 ((option & 0x20) ? 0x2000 : 0) | /* 100Mbps? */
1091 ((option & 0x10) ? 0x0100 : 0)); /* Full duplex? */
1092 }
1093
1094 /* Put the chip into low-power mode. */
1095 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1096 RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
1097
1098 return 0;
1099
1100 err_out:
1101 __rtl8139_cleanup_dev (dev);
1102 pci_disable_device (pdev);
1103 return i;
1104 }
1105
1106
1107 static void rtl8139_remove_one(struct pci_dev *pdev)
1108 {
1109 struct net_device *dev = pci_get_drvdata (pdev);
1110 struct rtl8139_private *tp = netdev_priv(dev);
1111
1112 assert (dev != NULL);
1113
1114 cancel_delayed_work_sync(&tp->thread);
1115
1116 unregister_netdev (dev);
1117
1118 __rtl8139_cleanup_dev (dev);
1119 pci_disable_device (pdev);
1120 }
1121
1122
1123 /* Serial EEPROM section. */
1124
1125 /* EEPROM_Ctrl bits. */
1126 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
1127 #define EE_CS 0x08 /* EEPROM chip select. */
1128 #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
1129 #define EE_WRITE_0 0x00
1130 #define EE_WRITE_1 0x02
1131 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */
1132 #define EE_ENB (0x80 | EE_CS)
1133
1134 /* Delay between EEPROM clock transitions.
1135 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1136 */
1137
1138 #define eeprom_delay() (void)RTL_R8(Cfg9346)
1139
1140 /* The EEPROM commands include the alway-set leading bit. */
1141 #define EE_WRITE_CMD (5)
1142 #define EE_READ_CMD (6)
1143 #define EE_ERASE_CMD (7)
1144
1145 static int read_eeprom(void __iomem *ioaddr, int location, int addr_len)
1146 {
1147 int i;
1148 unsigned retval = 0;
1149 int read_cmd = location | (EE_READ_CMD << addr_len);
1150
1151 RTL_W8 (Cfg9346, EE_ENB & ~EE_CS);
1152 RTL_W8 (Cfg9346, EE_ENB);
1153 eeprom_delay ();
1154
1155 /* Shift the read command bits out. */
1156 for (i = 4 + addr_len; i >= 0; i--) {
1157 int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1158 RTL_W8 (Cfg9346, EE_ENB | dataval);
1159 eeprom_delay ();
1160 RTL_W8 (Cfg9346, EE_ENB | dataval | EE_SHIFT_CLK);
1161 eeprom_delay ();
1162 }
1163 RTL_W8 (Cfg9346, EE_ENB);
1164 eeprom_delay ();
1165
1166 for (i = 16; i > 0; i--) {
1167 RTL_W8 (Cfg9346, EE_ENB | EE_SHIFT_CLK);
1168 eeprom_delay ();
1169 retval =
1170 (retval << 1) | ((RTL_R8 (Cfg9346) & EE_DATA_READ) ? 1 :
1171 0);
1172 RTL_W8 (Cfg9346, EE_ENB);
1173 eeprom_delay ();
1174 }
1175
1176 /* Terminate the EEPROM access. */
1177 RTL_W8(Cfg9346, 0);
1178 eeprom_delay ();
1179
1180 return retval;
1181 }
1182
1183 /* MII serial management: mostly bogus for now. */
1184 /* Read and write the MII management registers using software-generated
1185 serial MDIO protocol.
1186 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
1187 met by back-to-back PCI I/O cycles, but we insert a delay to avoid
1188 "overclocking" issues. */
1189 #define MDIO_DIR 0x80
1190 #define MDIO_DATA_OUT 0x04
1191 #define MDIO_DATA_IN 0x02
1192 #define MDIO_CLK 0x01
1193 #define MDIO_WRITE0 (MDIO_DIR)
1194 #define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
1195
1196 #define mdio_delay() RTL_R8(Config4)
1197
1198
1199 static const char mii_2_8139_map[8] = {
1200 BasicModeCtrl,
1201 BasicModeStatus,
1202 0,
1203 0,
1204 NWayAdvert,
1205 NWayLPAR,
1206 NWayExpansion,
1207 0
1208 };
1209
1210
1211 #ifdef CONFIG_8139TOO_8129
1212 /* Syncronize the MII management interface by shifting 32 one bits out. */
1213 static void mdio_sync (void __iomem *ioaddr)
1214 {
1215 int i;
1216
1217 for (i = 32; i >= 0; i--) {
1218 RTL_W8 (Config4, MDIO_WRITE1);
1219 mdio_delay ();
1220 RTL_W8 (Config4, MDIO_WRITE1 | MDIO_CLK);
1221 mdio_delay ();
1222 }
1223 }
1224 #endif
1225
1226 static int mdio_read (struct net_device *dev, int phy_id, int location)
1227 {
1228 struct rtl8139_private *tp = netdev_priv(dev);
1229 int retval = 0;
1230 #ifdef CONFIG_8139TOO_8129
1231 void __iomem *ioaddr = tp->mmio_addr;
1232 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
1233 int i;
1234 #endif
1235
1236 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1237 void __iomem *ioaddr = tp->mmio_addr;
1238 return location < 8 && mii_2_8139_map[location] ?
1239 RTL_R16 (mii_2_8139_map[location]) : 0;
1240 }
1241
1242 #ifdef CONFIG_8139TOO_8129
1243 mdio_sync (ioaddr);
1244 /* Shift the read command bits out. */
1245 for (i = 15; i >= 0; i--) {
1246 int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0;
1247
1248 RTL_W8 (Config4, MDIO_DIR | dataval);
1249 mdio_delay ();
1250 RTL_W8 (Config4, MDIO_DIR | dataval | MDIO_CLK);
1251 mdio_delay ();
1252 }
1253
1254 /* Read the two transition, 16 data, and wire-idle bits. */
1255 for (i = 19; i > 0; i--) {
1256 RTL_W8 (Config4, 0);
1257 mdio_delay ();
1258 retval = (retval << 1) | ((RTL_R8 (Config4) & MDIO_DATA_IN) ? 1 : 0);
1259 RTL_W8 (Config4, MDIO_CLK);
1260 mdio_delay ();
1261 }
1262 #endif
1263
1264 return (retval >> 1) & 0xffff;
1265 }
1266
1267
1268 static void mdio_write (struct net_device *dev, int phy_id, int location,
1269 int value)
1270 {
1271 struct rtl8139_private *tp = netdev_priv(dev);
1272 #ifdef CONFIG_8139TOO_8129
1273 void __iomem *ioaddr = tp->mmio_addr;
1274 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location << 18) | value;
1275 int i;
1276 #endif
1277
1278 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1279 void __iomem *ioaddr = tp->mmio_addr;
1280 if (location == 0) {
1281 RTL_W8 (Cfg9346, Cfg9346_Unlock);
1282 RTL_W16 (BasicModeCtrl, value);
1283 RTL_W8 (Cfg9346, Cfg9346_Lock);
1284 } else if (location < 8 && mii_2_8139_map[location])
1285 RTL_W16 (mii_2_8139_map[location], value);
1286 return;
1287 }
1288
1289 #ifdef CONFIG_8139TOO_8129
1290 mdio_sync (ioaddr);
1291
1292 /* Shift the command bits out. */
1293 for (i = 31; i >= 0; i--) {
1294 int dataval =
1295 (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
1296 RTL_W8 (Config4, dataval);
1297 mdio_delay ();
1298 RTL_W8 (Config4, dataval | MDIO_CLK);
1299 mdio_delay ();
1300 }
1301 /* Clear out extra bits. */
1302 for (i = 2; i > 0; i--) {
1303 RTL_W8 (Config4, 0);
1304 mdio_delay ();
1305 RTL_W8 (Config4, MDIO_CLK);
1306 mdio_delay ();
1307 }
1308 #endif
1309 }
1310
1311
1312 static int rtl8139_open (struct net_device *dev)
1313 {
1314 struct rtl8139_private *tp = netdev_priv(dev);
1315 void __iomem *ioaddr = tp->mmio_addr;
1316 const int irq = tp->pci_dev->irq;
1317 int retval;
1318
1319 retval = request_irq(irq, rtl8139_interrupt, IRQF_SHARED, dev->name, dev);
1320 if (retval)
1321 return retval;
1322
1323 tp->tx_bufs = dma_alloc_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
1324 &tp->tx_bufs_dma, GFP_KERNEL);
1325 tp->rx_ring = dma_alloc_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
1326 &tp->rx_ring_dma, GFP_KERNEL);
1327 if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
1328 free_irq(irq, dev);
1329
1330 if (tp->tx_bufs)
1331 dma_free_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
1332 tp->tx_bufs, tp->tx_bufs_dma);
1333 if (tp->rx_ring)
1334 dma_free_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
1335 tp->rx_ring, tp->rx_ring_dma);
1336
1337 return -ENOMEM;
1338
1339 }
1340
1341 napi_enable(&tp->napi);
1342
1343 tp->mii.full_duplex = tp->mii.force_media;
1344 tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
1345
1346 rtl8139_init_ring (dev);
1347 rtl8139_hw_start (dev);
1348 netif_start_queue (dev);
1349
1350 netif_dbg(tp, ifup, dev,
1351 "%s() ioaddr %#llx IRQ %d GP Pins %02x %s-duplex\n",
1352 __func__,
1353 (unsigned long long)pci_resource_start (tp->pci_dev, 1),
1354 irq, RTL_R8 (MediaStatus),
1355 tp->mii.full_duplex ? "full" : "half");
1356
1357 rtl8139_start_thread(tp);
1358
1359 return 0;
1360 }
1361
1362
1363 static void rtl_check_media (struct net_device *dev, unsigned int init_media)
1364 {
1365 struct rtl8139_private *tp = netdev_priv(dev);
1366
1367 if (tp->phys[0] >= 0) {
1368 mii_check_media(&tp->mii, netif_msg_link(tp), init_media);
1369 }
1370 }
1371
1372 /* Start the hardware at open or resume. */
1373 static void rtl8139_hw_start (struct net_device *dev)
1374 {
1375 struct rtl8139_private *tp = netdev_priv(dev);
1376 void __iomem *ioaddr = tp->mmio_addr;
1377 u32 i;
1378 u8 tmp;
1379
1380 /* Bring old chips out of low-power mode. */
1381 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1382 RTL_W8 (HltClk, 'R');
1383
1384 rtl8139_chip_reset (ioaddr);
1385
1386 /* unlock Config[01234] and BMCR register writes */
1387 RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1388 /* Restore our idea of the MAC address. */
1389 RTL_W32_F (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1390 RTL_W32_F (MAC0 + 4, le16_to_cpu (*(__le16 *) (dev->dev_addr + 4)));
1391
1392 tp->cur_rx = 0;
1393
1394 /* init Rx ring buffer DMA address */
1395 RTL_W32_F (RxBuf, tp->rx_ring_dma);
1396
1397 /* Must enable Tx/Rx before setting transfer thresholds! */
1398 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1399
1400 tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1401 RTL_W32 (RxConfig, tp->rx_config);
1402 RTL_W32 (TxConfig, rtl8139_tx_config);
1403
1404 rtl_check_media (dev, 1);
1405
1406 if (tp->chipset >= CH_8139B) {
1407 /* Disable magic packet scanning, which is enabled
1408 * when PM is enabled in Config1. It can be reenabled
1409 * via ETHTOOL_SWOL if desired. */
1410 RTL_W8 (Config3, RTL_R8 (Config3) & ~Cfg3_Magic);
1411 }
1412
1413 netdev_dbg(dev, "init buffer addresses\n");
1414
1415 /* Lock Config[01234] and BMCR register writes */
1416 RTL_W8 (Cfg9346, Cfg9346_Lock);
1417
1418 /* init Tx buffer DMA addresses */
1419 for (i = 0; i < NUM_TX_DESC; i++)
1420 RTL_W32_F (TxAddr0 + (i * 4), tp->tx_bufs_dma + (tp->tx_buf[i] - tp->tx_bufs));
1421
1422 RTL_W32 (RxMissed, 0);
1423
1424 rtl8139_set_rx_mode (dev);
1425
1426 /* no early-rx interrupts */
1427 RTL_W16 (MultiIntr, RTL_R16 (MultiIntr) & MultiIntrClear);
1428
1429 /* make sure RxTx has started */
1430 tmp = RTL_R8 (ChipCmd);
1431 if ((!(tmp & CmdRxEnb)) || (!(tmp & CmdTxEnb)))
1432 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1433
1434 /* Enable all known interrupts by setting the interrupt mask. */
1435 RTL_W16 (IntrMask, rtl8139_intr_mask);
1436 }
1437
1438
1439 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1440 static void rtl8139_init_ring (struct net_device *dev)
1441 {
1442 struct rtl8139_private *tp = netdev_priv(dev);
1443 int i;
1444
1445 tp->cur_rx = 0;
1446 tp->cur_tx = 0;
1447 tp->dirty_tx = 0;
1448
1449 for (i = 0; i < NUM_TX_DESC; i++)
1450 tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
1451 }
1452
1453
1454 /* This must be global for CONFIG_8139TOO_TUNE_TWISTER case */
1455 static int next_tick = 3 * HZ;
1456
1457 #ifndef CONFIG_8139TOO_TUNE_TWISTER
1458 static inline void rtl8139_tune_twister (struct net_device *dev,
1459 struct rtl8139_private *tp) {}
1460 #else
1461 enum TwisterParamVals {
1462 PARA78_default = 0x78fa8388,
1463 PARA7c_default = 0xcb38de43, /* param[0][3] */
1464 PARA7c_xxx = 0xcb38de43,
1465 };
1466
1467 static const unsigned long param[4][4] = {
1468 {0xcb39de43, 0xcb39ce43, 0xfb38de03, 0xcb38de43},
1469 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1470 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1471 {0xbb39de43, 0xbb39ce43, 0xbb39ce83, 0xbb39ce83}
1472 };
1473
1474 static void rtl8139_tune_twister (struct net_device *dev,
1475 struct rtl8139_private *tp)
1476 {
1477 int linkcase;
1478 void __iomem *ioaddr = tp->mmio_addr;
1479
1480 /* This is a complicated state machine to configure the "twister" for
1481 impedance/echos based on the cable length.
1482 All of this is magic and undocumented.
1483 */
1484 switch (tp->twistie) {
1485 case 1:
1486 if (RTL_R16 (CSCR) & CSCR_LinkOKBit) {
1487 /* We have link beat, let us tune the twister. */
1488 RTL_W16 (CSCR, CSCR_LinkDownOffCmd);
1489 tp->twistie = 2; /* Change to state 2. */
1490 next_tick = HZ / 10;
1491 } else {
1492 /* Just put in some reasonable defaults for when beat returns. */
1493 RTL_W16 (CSCR, CSCR_LinkDownCmd);
1494 RTL_W32 (FIFOTMS, 0x20); /* Turn on cable test mode. */
1495 RTL_W32 (PARA78, PARA78_default);
1496 RTL_W32 (PARA7c, PARA7c_default);
1497 tp->twistie = 0; /* Bail from future actions. */
1498 }
1499 break;
1500 case 2:
1501 /* Read how long it took to hear the echo. */
1502 linkcase = RTL_R16 (CSCR) & CSCR_LinkStatusBits;
1503 if (linkcase == 0x7000)
1504 tp->twist_row = 3;
1505 else if (linkcase == 0x3000)
1506 tp->twist_row = 2;
1507 else if (linkcase == 0x1000)
1508 tp->twist_row = 1;
1509 else
1510 tp->twist_row = 0;
1511 tp->twist_col = 0;
1512 tp->twistie = 3; /* Change to state 2. */
1513 next_tick = HZ / 10;
1514 break;
1515 case 3:
1516 /* Put out four tuning parameters, one per 100msec. */
1517 if (tp->twist_col == 0)
1518 RTL_W16 (FIFOTMS, 0);
1519 RTL_W32 (PARA7c, param[(int) tp->twist_row]
1520 [(int) tp->twist_col]);
1521 next_tick = HZ / 10;
1522 if (++tp->twist_col >= 4) {
1523 /* For short cables we are done.
1524 For long cables (row == 3) check for mistune. */
1525 tp->twistie =
1526 (tp->twist_row == 3) ? 4 : 0;
1527 }
1528 break;
1529 case 4:
1530 /* Special case for long cables: check for mistune. */
1531 if ((RTL_R16 (CSCR) &
1532 CSCR_LinkStatusBits) == 0x7000) {
1533 tp->twistie = 0;
1534 break;
1535 } else {
1536 RTL_W32 (PARA7c, 0xfb38de03);
1537 tp->twistie = 5;
1538 next_tick = HZ / 10;
1539 }
1540 break;
1541 case 5:
1542 /* Retune for shorter cable (column 2). */
1543 RTL_W32 (FIFOTMS, 0x20);
1544 RTL_W32 (PARA78, PARA78_default);
1545 RTL_W32 (PARA7c, PARA7c_default);
1546 RTL_W32 (FIFOTMS, 0x00);
1547 tp->twist_row = 2;
1548 tp->twist_col = 0;
1549 tp->twistie = 3;
1550 next_tick = HZ / 10;
1551 break;
1552
1553 default:
1554 /* do nothing */
1555 break;
1556 }
1557 }
1558 #endif /* CONFIG_8139TOO_TUNE_TWISTER */
1559
1560 static inline void rtl8139_thread_iter (struct net_device *dev,
1561 struct rtl8139_private *tp,
1562 void __iomem *ioaddr)
1563 {
1564 int mii_lpa;
1565
1566 mii_lpa = mdio_read (dev, tp->phys[0], MII_LPA);
1567
1568 if (!tp->mii.force_media && mii_lpa != 0xffff) {
1569 int duplex = ((mii_lpa & LPA_100FULL) ||
1570 (mii_lpa & 0x01C0) == 0x0040);
1571 if (tp->mii.full_duplex != duplex) {
1572 tp->mii.full_duplex = duplex;
1573
1574 if (mii_lpa) {
1575 netdev_info(dev, "Setting %s-duplex based on MII #%d link partner ability of %04x\n",
1576 tp->mii.full_duplex ? "full" : "half",
1577 tp->phys[0], mii_lpa);
1578 } else {
1579 netdev_info(dev, "media is unconnected, link down, or incompatible connection\n");
1580 }
1581 #if 0
1582 RTL_W8 (Cfg9346, Cfg9346_Unlock);
1583 RTL_W8 (Config1, tp->mii.full_duplex ? 0x60 : 0x20);
1584 RTL_W8 (Cfg9346, Cfg9346_Lock);
1585 #endif
1586 }
1587 }
1588
1589 next_tick = HZ * 60;
1590
1591 rtl8139_tune_twister (dev, tp);
1592
1593 netdev_dbg(dev, "Media selection tick, Link partner %04x\n",
1594 RTL_R16(NWayLPAR));
1595 netdev_dbg(dev, "Other registers are IntMask %04x IntStatus %04x\n",
1596 RTL_R16(IntrMask), RTL_R16(IntrStatus));
1597 netdev_dbg(dev, "Chip config %02x %02x\n",
1598 RTL_R8(Config0), RTL_R8(Config1));
1599 }
1600
1601 static void rtl8139_thread (struct work_struct *work)
1602 {
1603 struct rtl8139_private *tp =
1604 container_of(work, struct rtl8139_private, thread.work);
1605 struct net_device *dev = tp->mii.dev;
1606 unsigned long thr_delay = next_tick;
1607
1608 rtnl_lock();
1609
1610 if (!netif_running(dev))
1611 goto out_unlock;
1612
1613 if (tp->watchdog_fired) {
1614 tp->watchdog_fired = 0;
1615 rtl8139_tx_timeout_task(work);
1616 } else
1617 rtl8139_thread_iter(dev, tp, tp->mmio_addr);
1618
1619 if (tp->have_thread)
1620 schedule_delayed_work(&tp->thread, thr_delay);
1621 out_unlock:
1622 rtnl_unlock ();
1623 }
1624
1625 static void rtl8139_start_thread(struct rtl8139_private *tp)
1626 {
1627 tp->twistie = 0;
1628 if (tp->chipset == CH_8139_K)
1629 tp->twistie = 1;
1630 else if (tp->drv_flags & HAS_LNK_CHNG)
1631 return;
1632
1633 tp->have_thread = 1;
1634 tp->watchdog_fired = 0;
1635
1636 schedule_delayed_work(&tp->thread, next_tick);
1637 }
1638
1639 static inline void rtl8139_tx_clear (struct rtl8139_private *tp)
1640 {
1641 tp->cur_tx = 0;
1642 tp->dirty_tx = 0;
1643
1644 /* XXX account for unsent Tx packets in tp->stats.tx_dropped */
1645 }
1646
1647 static void rtl8139_tx_timeout_task (struct work_struct *work)
1648 {
1649 struct rtl8139_private *tp =
1650 container_of(work, struct rtl8139_private, thread.work);
1651 struct net_device *dev = tp->mii.dev;
1652 void __iomem *ioaddr = tp->mmio_addr;
1653 int i;
1654 u8 tmp8;
1655
1656 netdev_dbg(dev, "Transmit timeout, status %02x %04x %04x media %02x\n",
1657 RTL_R8(ChipCmd), RTL_R16(IntrStatus),
1658 RTL_R16(IntrMask), RTL_R8(MediaStatus));
1659 /* Emit info to figure out what went wrong. */
1660 netdev_dbg(dev, "Tx queue start entry %ld dirty entry %ld\n",
1661 tp->cur_tx, tp->dirty_tx);
1662 for (i = 0; i < NUM_TX_DESC; i++)
1663 netdev_dbg(dev, "Tx descriptor %d is %08x%s\n",
1664 i, RTL_R32(TxStatus0 + (i * 4)),
1665 i == tp->dirty_tx % NUM_TX_DESC ?
1666 " (queue head)" : "");
1667
1668 tp->xstats.tx_timeouts++;
1669
1670 /* disable Tx ASAP, if not already */
1671 tmp8 = RTL_R8 (ChipCmd);
1672 if (tmp8 & CmdTxEnb)
1673 RTL_W8 (ChipCmd, CmdRxEnb);
1674
1675 spin_lock_bh(&tp->rx_lock);
1676 /* Disable interrupts by clearing the interrupt mask. */
1677 RTL_W16 (IntrMask, 0x0000);
1678
1679 /* Stop a shared interrupt from scavenging while we are. */
1680 spin_lock_irq(&tp->lock);
1681 rtl8139_tx_clear (tp);
1682 spin_unlock_irq(&tp->lock);
1683
1684 /* ...and finally, reset everything */
1685 if (netif_running(dev)) {
1686 rtl8139_hw_start (dev);
1687 netif_wake_queue (dev);
1688 }
1689 spin_unlock_bh(&tp->rx_lock);
1690 }
1691
1692 static void rtl8139_tx_timeout (struct net_device *dev)
1693 {
1694 struct rtl8139_private *tp = netdev_priv(dev);
1695
1696 tp->watchdog_fired = 1;
1697 if (!tp->have_thread) {
1698 INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
1699 schedule_delayed_work(&tp->thread, next_tick);
1700 }
1701 }
1702
1703 static netdev_tx_t rtl8139_start_xmit (struct sk_buff *skb,
1704 struct net_device *dev)
1705 {
1706 struct rtl8139_private *tp = netdev_priv(dev);
1707 void __iomem *ioaddr = tp->mmio_addr;
1708 unsigned int entry;
1709 unsigned int len = skb->len;
1710 unsigned long flags;
1711
1712 /* Calculate the next Tx descriptor entry. */
1713 entry = tp->cur_tx % NUM_TX_DESC;
1714
1715 /* Note: the chip doesn't have auto-pad! */
1716 if (likely(len < TX_BUF_SIZE)) {
1717 if (len < ETH_ZLEN)
1718 memset(tp->tx_buf[entry], 0, ETH_ZLEN);
1719 skb_copy_and_csum_dev(skb, tp->tx_buf[entry]);
1720 dev_kfree_skb_any(skb);
1721 } else {
1722 dev_kfree_skb_any(skb);
1723 dev->stats.tx_dropped++;
1724 return NETDEV_TX_OK;
1725 }
1726
1727 spin_lock_irqsave(&tp->lock, flags);
1728 /*
1729 * Writing to TxStatus triggers a DMA transfer of the data
1730 * copied to tp->tx_buf[entry] above. Use a memory barrier
1731 * to make sure that the device sees the updated data.
1732 */
1733 wmb();
1734 RTL_W32_F (TxStatus0 + (entry * sizeof (u32)),
1735 tp->tx_flag | max(len, (unsigned int)ETH_ZLEN));
1736
1737 tp->cur_tx++;
1738
1739 if ((tp->cur_tx - NUM_TX_DESC) == tp->dirty_tx)
1740 netif_stop_queue (dev);
1741 spin_unlock_irqrestore(&tp->lock, flags);
1742
1743 netif_dbg(tp, tx_queued, dev, "Queued Tx packet size %u to slot %d\n",
1744 len, entry);
1745
1746 return NETDEV_TX_OK;
1747 }
1748
1749
1750 static void rtl8139_tx_interrupt (struct net_device *dev,
1751 struct rtl8139_private *tp,
1752 void __iomem *ioaddr)
1753 {
1754 unsigned long dirty_tx, tx_left;
1755
1756 assert (dev != NULL);
1757 assert (ioaddr != NULL);
1758
1759 dirty_tx = tp->dirty_tx;
1760 tx_left = tp->cur_tx - dirty_tx;
1761 while (tx_left > 0) {
1762 int entry = dirty_tx % NUM_TX_DESC;
1763 int txstatus;
1764
1765 txstatus = RTL_R32 (TxStatus0 + (entry * sizeof (u32)));
1766
1767 if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
1768 break; /* It still hasn't been Txed */
1769
1770 /* Note: TxCarrierLost is always asserted at 100mbps. */
1771 if (txstatus & (TxOutOfWindow | TxAborted)) {
1772 /* There was an major error, log it. */
1773 netif_dbg(tp, tx_err, dev, "Transmit error, Tx status %08x\n",
1774 txstatus);
1775 dev->stats.tx_errors++;
1776 if (txstatus & TxAborted) {
1777 dev->stats.tx_aborted_errors++;
1778 RTL_W32 (TxConfig, TxClearAbt);
1779 RTL_W16 (IntrStatus, TxErr);
1780 wmb();
1781 }
1782 if (txstatus & TxCarrierLost)
1783 dev->stats.tx_carrier_errors++;
1784 if (txstatus & TxOutOfWindow)
1785 dev->stats.tx_window_errors++;
1786 } else {
1787 if (txstatus & TxUnderrun) {
1788 /* Add 64 to the Tx FIFO threshold. */
1789 if (tp->tx_flag < 0x00300000)
1790 tp->tx_flag += 0x00020000;
1791 dev->stats.tx_fifo_errors++;
1792 }
1793 dev->stats.collisions += (txstatus >> 24) & 15;
1794 u64_stats_update_begin(&tp->tx_stats.syncp);
1795 tp->tx_stats.packets++;
1796 tp->tx_stats.bytes += txstatus & 0x7ff;
1797 u64_stats_update_end(&tp->tx_stats.syncp);
1798 }
1799
1800 dirty_tx++;
1801 tx_left--;
1802 }
1803
1804 #ifndef RTL8139_NDEBUG
1805 if (tp->cur_tx - dirty_tx > NUM_TX_DESC) {
1806 netdev_err(dev, "Out-of-sync dirty pointer, %ld vs. %ld\n",
1807 dirty_tx, tp->cur_tx);
1808 dirty_tx += NUM_TX_DESC;
1809 }
1810 #endif /* RTL8139_NDEBUG */
1811
1812 /* only wake the queue if we did work, and the queue is stopped */
1813 if (tp->dirty_tx != dirty_tx) {
1814 tp->dirty_tx = dirty_tx;
1815 mb();
1816 netif_wake_queue (dev);
1817 }
1818 }
1819
1820
1821 /* TODO: clean this up! Rx reset need not be this intensive */
1822 static void rtl8139_rx_err (u32 rx_status, struct net_device *dev,
1823 struct rtl8139_private *tp, void __iomem *ioaddr)
1824 {
1825 u8 tmp8;
1826 #ifdef CONFIG_8139_OLD_RX_RESET
1827 int tmp_work;
1828 #endif
1829
1830 netif_dbg(tp, rx_err, dev, "Ethernet frame had errors, status %08x\n",
1831 rx_status);
1832 dev->stats.rx_errors++;
1833 if (!(rx_status & RxStatusOK)) {
1834 if (rx_status & RxTooLong) {
1835 netdev_dbg(dev, "Oversized Ethernet frame, status %04x!\n",
1836 rx_status);
1837 /* A.C.: The chip hangs here. */
1838 }
1839 if (rx_status & (RxBadSymbol | RxBadAlign))
1840 dev->stats.rx_frame_errors++;
1841 if (rx_status & (RxRunt | RxTooLong))
1842 dev->stats.rx_length_errors++;
1843 if (rx_status & RxCRCErr)
1844 dev->stats.rx_crc_errors++;
1845 } else {
1846 tp->xstats.rx_lost_in_ring++;
1847 }
1848
1849 #ifndef CONFIG_8139_OLD_RX_RESET
1850 tmp8 = RTL_R8 (ChipCmd);
1851 RTL_W8 (ChipCmd, tmp8 & ~CmdRxEnb);
1852 RTL_W8 (ChipCmd, tmp8);
1853 RTL_W32 (RxConfig, tp->rx_config);
1854 tp->cur_rx = 0;
1855 #else
1856 /* Reset the receiver, based on RealTek recommendation. (Bug?) */
1857
1858 /* disable receive */
1859 RTL_W8_F (ChipCmd, CmdTxEnb);
1860 tmp_work = 200;
1861 while (--tmp_work > 0) {
1862 udelay(1);
1863 tmp8 = RTL_R8 (ChipCmd);
1864 if (!(tmp8 & CmdRxEnb))
1865 break;
1866 }
1867 if (tmp_work <= 0)
1868 netdev_warn(dev, "rx stop wait too long\n");
1869 /* restart receive */
1870 tmp_work = 200;
1871 while (--tmp_work > 0) {
1872 RTL_W8_F (ChipCmd, CmdRxEnb | CmdTxEnb);
1873 udelay(1);
1874 tmp8 = RTL_R8 (ChipCmd);
1875 if ((tmp8 & CmdRxEnb) && (tmp8 & CmdTxEnb))
1876 break;
1877 }
1878 if (tmp_work <= 0)
1879 netdev_warn(dev, "tx/rx enable wait too long\n");
1880
1881 /* and reinitialize all rx related registers */
1882 RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1883 /* Must enable Tx/Rx before setting transfer thresholds! */
1884 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1885
1886 tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1887 RTL_W32 (RxConfig, tp->rx_config);
1888 tp->cur_rx = 0;
1889
1890 netdev_dbg(dev, "init buffer addresses\n");
1891
1892 /* Lock Config[01234] and BMCR register writes */
1893 RTL_W8 (Cfg9346, Cfg9346_Lock);
1894
1895 /* init Rx ring buffer DMA address */
1896 RTL_W32_F (RxBuf, tp->rx_ring_dma);
1897
1898 /* A.C.: Reset the multicast list. */
1899 __set_rx_mode (dev);
1900 #endif
1901 }
1902
1903 #if RX_BUF_IDX == 3
1904 static inline void wrap_copy(struct sk_buff *skb, const unsigned char *ring,
1905 u32 offset, unsigned int size)
1906 {
1907 u32 left = RX_BUF_LEN - offset;
1908
1909 if (size > left) {
1910 skb_copy_to_linear_data(skb, ring + offset, left);
1911 skb_copy_to_linear_data_offset(skb, left, ring, size - left);
1912 } else
1913 skb_copy_to_linear_data(skb, ring + offset, size);
1914 }
1915 #endif
1916
1917 static void rtl8139_isr_ack(struct rtl8139_private *tp)
1918 {
1919 void __iomem *ioaddr = tp->mmio_addr;
1920 u16 status;
1921
1922 status = RTL_R16 (IntrStatus) & RxAckBits;
1923
1924 /* Clear out errors and receive interrupts */
1925 if (likely(status != 0)) {
1926 if (unlikely(status & (RxFIFOOver | RxOverflow))) {
1927 tp->dev->stats.rx_errors++;
1928 if (status & RxFIFOOver)
1929 tp->dev->stats.rx_fifo_errors++;
1930 }
1931 RTL_W16_F (IntrStatus, RxAckBits);
1932 }
1933 }
1934
1935 static int rtl8139_rx(struct net_device *dev, struct rtl8139_private *tp,
1936 int budget)
1937 {
1938 void __iomem *ioaddr = tp->mmio_addr;
1939 int received = 0;
1940 unsigned char *rx_ring = tp->rx_ring;
1941 unsigned int cur_rx = tp->cur_rx;
1942 unsigned int rx_size = 0;
1943
1944 netdev_dbg(dev, "In %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n",
1945 __func__, (u16)cur_rx,
1946 RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
1947
1948 while (netif_running(dev) && received < budget &&
1949 (RTL_R8 (ChipCmd) & RxBufEmpty) == 0) {
1950 u32 ring_offset = cur_rx % RX_BUF_LEN;
1951 u32 rx_status;
1952 unsigned int pkt_size;
1953 struct sk_buff *skb;
1954
1955 rmb();
1956
1957 /* read size+status of next frame from DMA ring buffer */
1958 rx_status = le32_to_cpu (*(__le32 *) (rx_ring + ring_offset));
1959 rx_size = rx_status >> 16;
1960 if (likely(!(dev->features & NETIF_F_RXFCS)))
1961 pkt_size = rx_size - 4;
1962 else
1963 pkt_size = rx_size;
1964
1965 netif_dbg(tp, rx_status, dev, "%s() status %04x, size %04x, cur %04x\n",
1966 __func__, rx_status, rx_size, cur_rx);
1967 #if RTL8139_DEBUG > 2
1968 print_hex_dump(KERN_DEBUG, "Frame contents: ",
1969 DUMP_PREFIX_OFFSET, 16, 1,
1970 &rx_ring[ring_offset], 70, true);
1971 #endif
1972
1973 /* Packet copy from FIFO still in progress.
1974 * Theoretically, this should never happen
1975 * since EarlyRx is disabled.
1976 */
1977 if (unlikely(rx_size == 0xfff0)) {
1978 if (!tp->fifo_copy_timeout)
1979 tp->fifo_copy_timeout = jiffies + 2;
1980 else if (time_after(jiffies, tp->fifo_copy_timeout)) {
1981 netdev_dbg(dev, "hung FIFO. Reset\n");
1982 rx_size = 0;
1983 goto no_early_rx;
1984 }
1985 netif_dbg(tp, intr, dev, "fifo copy in progress\n");
1986 tp->xstats.early_rx++;
1987 break;
1988 }
1989
1990 no_early_rx:
1991 tp->fifo_copy_timeout = 0;
1992
1993 /* If Rx err or invalid rx_size/rx_status received
1994 * (which happens if we get lost in the ring),
1995 * Rx process gets reset, so we abort any further
1996 * Rx processing.
1997 */
1998 if (unlikely((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
1999 (rx_size < 8) ||
2000 (!(rx_status & RxStatusOK)))) {
2001 if ((dev->features & NETIF_F_RXALL) &&
2002 (rx_size <= (MAX_ETH_FRAME_SIZE + 4)) &&
2003 (rx_size >= 8) &&
2004 (!(rx_status & RxStatusOK))) {
2005 /* Length is at least mostly OK, but pkt has
2006 * error. I'm hoping we can handle some of these
2007 * errors without resetting the chip. --Ben
2008 */
2009 dev->stats.rx_errors++;
2010 if (rx_status & RxCRCErr) {
2011 dev->stats.rx_crc_errors++;
2012 goto keep_pkt;
2013 }
2014 if (rx_status & RxRunt) {
2015 dev->stats.rx_length_errors++;
2016 goto keep_pkt;
2017 }
2018 }
2019 rtl8139_rx_err (rx_status, dev, tp, ioaddr);
2020 received = -1;
2021 goto out;
2022 }
2023
2024 keep_pkt:
2025 /* Malloc up new buffer, compatible with net-2e. */
2026 /* Omit the four octet CRC from the length. */
2027
2028 skb = netdev_alloc_skb_ip_align(dev, pkt_size);
2029 if (likely(skb)) {
2030 #if RX_BUF_IDX == 3
2031 wrap_copy(skb, rx_ring, ring_offset+4, pkt_size);
2032 #else
2033 skb_copy_to_linear_data (skb, &rx_ring[ring_offset + 4], pkt_size);
2034 #endif
2035 skb_put (skb, pkt_size);
2036
2037 skb->protocol = eth_type_trans (skb, dev);
2038
2039 u64_stats_update_begin(&tp->rx_stats.syncp);
2040 tp->rx_stats.packets++;
2041 tp->rx_stats.bytes += pkt_size;
2042 u64_stats_update_end(&tp->rx_stats.syncp);
2043
2044 netif_receive_skb (skb);
2045 } else {
2046 dev->stats.rx_dropped++;
2047 }
2048 received++;
2049
2050 cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
2051 RTL_W16 (RxBufPtr, (u16) (cur_rx - 16));
2052
2053 rtl8139_isr_ack(tp);
2054 }
2055
2056 if (unlikely(!received || rx_size == 0xfff0))
2057 rtl8139_isr_ack(tp);
2058
2059 netdev_dbg(dev, "Done %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n",
2060 __func__, cur_rx,
2061 RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
2062
2063 tp->cur_rx = cur_rx;
2064
2065 /*
2066 * The receive buffer should be mostly empty.
2067 * Tell NAPI to reenable the Rx irq.
2068 */
2069 if (tp->fifo_copy_timeout)
2070 received = budget;
2071
2072 out:
2073 return received;
2074 }
2075
2076
2077 static void rtl8139_weird_interrupt (struct net_device *dev,
2078 struct rtl8139_private *tp,
2079 void __iomem *ioaddr,
2080 int status, int link_changed)
2081 {
2082 netdev_dbg(dev, "Abnormal interrupt, status %08x\n", status);
2083
2084 assert (dev != NULL);
2085 assert (tp != NULL);
2086 assert (ioaddr != NULL);
2087
2088 /* Update the error count. */
2089 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2090 RTL_W32 (RxMissed, 0);
2091
2092 if ((status & RxUnderrun) && link_changed &&
2093 (tp->drv_flags & HAS_LNK_CHNG)) {
2094 rtl_check_media(dev, 0);
2095 status &= ~RxUnderrun;
2096 }
2097
2098 if (status & (RxUnderrun | RxErr))
2099 dev->stats.rx_errors++;
2100
2101 if (status & PCSTimeout)
2102 dev->stats.rx_length_errors++;
2103 if (status & RxUnderrun)
2104 dev->stats.rx_fifo_errors++;
2105 if (status & PCIErr) {
2106 u16 pci_cmd_status;
2107 pci_read_config_word (tp->pci_dev, PCI_STATUS, &pci_cmd_status);
2108 pci_write_config_word (tp->pci_dev, PCI_STATUS, pci_cmd_status);
2109
2110 netdev_err(dev, "PCI Bus error %04x\n", pci_cmd_status);
2111 }
2112 }
2113
2114 static int rtl8139_poll(struct napi_struct *napi, int budget)
2115 {
2116 struct rtl8139_private *tp = container_of(napi, struct rtl8139_private, napi);
2117 struct net_device *dev = tp->dev;
2118 void __iomem *ioaddr = tp->mmio_addr;
2119 int work_done;
2120
2121 spin_lock(&tp->rx_lock);
2122 work_done = 0;
2123 if (likely(RTL_R16(IntrStatus) & RxAckBits))
2124 work_done += rtl8139_rx(dev, tp, budget);
2125
2126 if (work_done < budget) {
2127 unsigned long flags;
2128 /*
2129 * Order is important since data can get interrupted
2130 * again when we think we are done.
2131 */
2132 spin_lock_irqsave(&tp->lock, flags);
2133 __napi_complete(napi);
2134 RTL_W16_F(IntrMask, rtl8139_intr_mask);
2135 spin_unlock_irqrestore(&tp->lock, flags);
2136 }
2137 spin_unlock(&tp->rx_lock);
2138
2139 return work_done;
2140 }
2141
2142 /* The interrupt handler does all of the Rx thread work and cleans up
2143 after the Tx thread. */
2144 static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance)
2145 {
2146 struct net_device *dev = (struct net_device *) dev_instance;
2147 struct rtl8139_private *tp = netdev_priv(dev);
2148 void __iomem *ioaddr = tp->mmio_addr;
2149 u16 status, ackstat;
2150 int link_changed = 0; /* avoid bogus "uninit" warning */
2151 int handled = 0;
2152
2153 spin_lock (&tp->lock);
2154 status = RTL_R16 (IntrStatus);
2155
2156 /* shared irq? */
2157 if (unlikely((status & rtl8139_intr_mask) == 0))
2158 goto out;
2159
2160 handled = 1;
2161
2162 /* h/w no longer present (hotplug?) or major error, bail */
2163 if (unlikely(status == 0xFFFF))
2164 goto out;
2165
2166 /* close possible race's with dev_close */
2167 if (unlikely(!netif_running(dev))) {
2168 RTL_W16 (IntrMask, 0);
2169 goto out;
2170 }
2171
2172 /* Acknowledge all of the current interrupt sources ASAP, but
2173 an first get an additional status bit from CSCR. */
2174 if (unlikely(status & RxUnderrun))
2175 link_changed = RTL_R16 (CSCR) & CSCR_LinkChangeBit;
2176
2177 ackstat = status & ~(RxAckBits | TxErr);
2178 if (ackstat)
2179 RTL_W16 (IntrStatus, ackstat);
2180
2181 /* Receive packets are processed by poll routine.
2182 If not running start it now. */
2183 if (status & RxAckBits){
2184 if (napi_schedule_prep(&tp->napi)) {
2185 RTL_W16_F (IntrMask, rtl8139_norx_intr_mask);
2186 __napi_schedule(&tp->napi);
2187 }
2188 }
2189
2190 /* Check uncommon events with one test. */
2191 if (unlikely(status & (PCIErr | PCSTimeout | RxUnderrun | RxErr)))
2192 rtl8139_weird_interrupt (dev, tp, ioaddr,
2193 status, link_changed);
2194
2195 if (status & (TxOK | TxErr)) {
2196 rtl8139_tx_interrupt (dev, tp, ioaddr);
2197 if (status & TxErr)
2198 RTL_W16 (IntrStatus, TxErr);
2199 }
2200 out:
2201 spin_unlock (&tp->lock);
2202
2203 netdev_dbg(dev, "exiting interrupt, intr_status=%#4.4x\n",
2204 RTL_R16(IntrStatus));
2205 return IRQ_RETVAL(handled);
2206 }
2207
2208 #ifdef CONFIG_NET_POLL_CONTROLLER
2209 /*
2210 * Polling receive - used by netconsole and other diagnostic tools
2211 * to allow network i/o with interrupts disabled.
2212 */
2213 static void rtl8139_poll_controller(struct net_device *dev)
2214 {
2215 struct rtl8139_private *tp = netdev_priv(dev);
2216 const int irq = tp->pci_dev->irq;
2217
2218 disable_irq(irq);
2219 rtl8139_interrupt(irq, dev);
2220 enable_irq(irq);
2221 }
2222 #endif
2223
2224 static int rtl8139_set_mac_address(struct net_device *dev, void *p)
2225 {
2226 struct rtl8139_private *tp = netdev_priv(dev);
2227 void __iomem *ioaddr = tp->mmio_addr;
2228 struct sockaddr *addr = p;
2229
2230 if (!is_valid_ether_addr(addr->sa_data))
2231 return -EADDRNOTAVAIL;
2232
2233 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
2234
2235 spin_lock_irq(&tp->lock);
2236
2237 RTL_W8_F(Cfg9346, Cfg9346_Unlock);
2238 RTL_W32_F(MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
2239 RTL_W32_F(MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
2240 RTL_W8_F(Cfg9346, Cfg9346_Lock);
2241
2242 spin_unlock_irq(&tp->lock);
2243
2244 return 0;
2245 }
2246
2247 static int rtl8139_close (struct net_device *dev)
2248 {
2249 struct rtl8139_private *tp = netdev_priv(dev);
2250 void __iomem *ioaddr = tp->mmio_addr;
2251 unsigned long flags;
2252
2253 netif_stop_queue(dev);
2254 napi_disable(&tp->napi);
2255
2256 netif_dbg(tp, ifdown, dev, "Shutting down ethercard, status was 0x%04x\n",
2257 RTL_R16(IntrStatus));
2258
2259 spin_lock_irqsave (&tp->lock, flags);
2260
2261 /* Stop the chip's Tx and Rx DMA processes. */
2262 RTL_W8 (ChipCmd, 0);
2263
2264 /* Disable interrupts by clearing the interrupt mask. */
2265 RTL_W16 (IntrMask, 0);
2266
2267 /* Update the error counts. */
2268 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2269 RTL_W32 (RxMissed, 0);
2270
2271 spin_unlock_irqrestore (&tp->lock, flags);
2272
2273 free_irq(tp->pci_dev->irq, dev);
2274
2275 rtl8139_tx_clear (tp);
2276
2277 dma_free_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
2278 tp->rx_ring, tp->rx_ring_dma);
2279 dma_free_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
2280 tp->tx_bufs, tp->tx_bufs_dma);
2281 tp->rx_ring = NULL;
2282 tp->tx_bufs = NULL;
2283
2284 /* Green! Put the chip in low-power mode. */
2285 RTL_W8 (Cfg9346, Cfg9346_Unlock);
2286
2287 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
2288 RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
2289
2290 return 0;
2291 }
2292
2293
2294 /* Get the ethtool Wake-on-LAN settings. Assumes that wol points to
2295 kernel memory, *wol has been initialized as {ETHTOOL_GWOL}, and
2296 other threads or interrupts aren't messing with the 8139. */
2297 static void rtl8139_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2298 {
2299 struct rtl8139_private *tp = netdev_priv(dev);
2300 void __iomem *ioaddr = tp->mmio_addr;
2301
2302 spin_lock_irq(&tp->lock);
2303 if (rtl_chip_info[tp->chipset].flags & HasLWake) {
2304 u8 cfg3 = RTL_R8 (Config3);
2305 u8 cfg5 = RTL_R8 (Config5);
2306
2307 wol->supported = WAKE_PHY | WAKE_MAGIC
2308 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
2309
2310 wol->wolopts = 0;
2311 if (cfg3 & Cfg3_LinkUp)
2312 wol->wolopts |= WAKE_PHY;
2313 if (cfg3 & Cfg3_Magic)
2314 wol->wolopts |= WAKE_MAGIC;
2315 /* (KON)FIXME: See how netdev_set_wol() handles the
2316 following constants. */
2317 if (cfg5 & Cfg5_UWF)
2318 wol->wolopts |= WAKE_UCAST;
2319 if (cfg5 & Cfg5_MWF)
2320 wol->wolopts |= WAKE_MCAST;
2321 if (cfg5 & Cfg5_BWF)
2322 wol->wolopts |= WAKE_BCAST;
2323 }
2324 spin_unlock_irq(&tp->lock);
2325 }
2326
2327
2328 /* Set the ethtool Wake-on-LAN settings. Return 0 or -errno. Assumes
2329 that wol points to kernel memory and other threads or interrupts
2330 aren't messing with the 8139. */
2331 static int rtl8139_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2332 {
2333 struct rtl8139_private *tp = netdev_priv(dev);
2334 void __iomem *ioaddr = tp->mmio_addr;
2335 u32 support;
2336 u8 cfg3, cfg5;
2337
2338 support = ((rtl_chip_info[tp->chipset].flags & HasLWake)
2339 ? (WAKE_PHY | WAKE_MAGIC
2340 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST)
2341 : 0);
2342 if (wol->wolopts & ~support)
2343 return -EINVAL;
2344
2345 spin_lock_irq(&tp->lock);
2346 cfg3 = RTL_R8 (Config3) & ~(Cfg3_LinkUp | Cfg3_Magic);
2347 if (wol->wolopts & WAKE_PHY)
2348 cfg3 |= Cfg3_LinkUp;
2349 if (wol->wolopts & WAKE_MAGIC)
2350 cfg3 |= Cfg3_Magic;
2351 RTL_W8 (Cfg9346, Cfg9346_Unlock);
2352 RTL_W8 (Config3, cfg3);
2353 RTL_W8 (Cfg9346, Cfg9346_Lock);
2354
2355 cfg5 = RTL_R8 (Config5) & ~(Cfg5_UWF | Cfg5_MWF | Cfg5_BWF);
2356 /* (KON)FIXME: These are untested. We may have to set the
2357 CRC0, Wakeup0 and LSBCRC0 registers too, but I have no
2358 documentation. */
2359 if (wol->wolopts & WAKE_UCAST)
2360 cfg5 |= Cfg5_UWF;
2361 if (wol->wolopts & WAKE_MCAST)
2362 cfg5 |= Cfg5_MWF;
2363 if (wol->wolopts & WAKE_BCAST)
2364 cfg5 |= Cfg5_BWF;
2365 RTL_W8 (Config5, cfg5); /* need not unlock via Cfg9346 */
2366 spin_unlock_irq(&tp->lock);
2367
2368 return 0;
2369 }
2370
2371 static void rtl8139_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2372 {
2373 struct rtl8139_private *tp = netdev_priv(dev);
2374 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
2375 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
2376 strlcpy(info->bus_info, pci_name(tp->pci_dev), sizeof(info->bus_info));
2377 info->regdump_len = tp->regs_len;
2378 }
2379
2380 static int rtl8139_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2381 {
2382 struct rtl8139_private *tp = netdev_priv(dev);
2383 spin_lock_irq(&tp->lock);
2384 mii_ethtool_gset(&tp->mii, cmd);
2385 spin_unlock_irq(&tp->lock);
2386 return 0;
2387 }
2388
2389 static int rtl8139_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2390 {
2391 struct rtl8139_private *tp = netdev_priv(dev);
2392 int rc;
2393 spin_lock_irq(&tp->lock);
2394 rc = mii_ethtool_sset(&tp->mii, cmd);
2395 spin_unlock_irq(&tp->lock);
2396 return rc;
2397 }
2398
2399 static int rtl8139_nway_reset(struct net_device *dev)
2400 {
2401 struct rtl8139_private *tp = netdev_priv(dev);
2402 return mii_nway_restart(&tp->mii);
2403 }
2404
2405 static u32 rtl8139_get_link(struct net_device *dev)
2406 {
2407 struct rtl8139_private *tp = netdev_priv(dev);
2408 return mii_link_ok(&tp->mii);
2409 }
2410
2411 static u32 rtl8139_get_msglevel(struct net_device *dev)
2412 {
2413 struct rtl8139_private *tp = netdev_priv(dev);
2414 return tp->msg_enable;
2415 }
2416
2417 static void rtl8139_set_msglevel(struct net_device *dev, u32 datum)
2418 {
2419 struct rtl8139_private *tp = netdev_priv(dev);
2420 tp->msg_enable = datum;
2421 }
2422
2423 static int rtl8139_get_regs_len(struct net_device *dev)
2424 {
2425 struct rtl8139_private *tp;
2426 /* TODO: we are too slack to do reg dumping for pio, for now */
2427 if (use_io)
2428 return 0;
2429 tp = netdev_priv(dev);
2430 return tp->regs_len;
2431 }
2432
2433 static void rtl8139_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
2434 {
2435 struct rtl8139_private *tp;
2436
2437 /* TODO: we are too slack to do reg dumping for pio, for now */
2438 if (use_io)
2439 return;
2440 tp = netdev_priv(dev);
2441
2442 regs->version = RTL_REGS_VER;
2443
2444 spin_lock_irq(&tp->lock);
2445 memcpy_fromio(regbuf, tp->mmio_addr, regs->len);
2446 spin_unlock_irq(&tp->lock);
2447 }
2448
2449 static int rtl8139_get_sset_count(struct net_device *dev, int sset)
2450 {
2451 switch (sset) {
2452 case ETH_SS_STATS:
2453 return RTL_NUM_STATS;
2454 default:
2455 return -EOPNOTSUPP;
2456 }
2457 }
2458
2459 static void rtl8139_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2460 {
2461 struct rtl8139_private *tp = netdev_priv(dev);
2462
2463 data[0] = tp->xstats.early_rx;
2464 data[1] = tp->xstats.tx_buf_mapped;
2465 data[2] = tp->xstats.tx_timeouts;
2466 data[3] = tp->xstats.rx_lost_in_ring;
2467 }
2468
2469 static void rtl8139_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2470 {
2471 memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2472 }
2473
2474 static const struct ethtool_ops rtl8139_ethtool_ops = {
2475 .get_drvinfo = rtl8139_get_drvinfo,
2476 .get_settings = rtl8139_get_settings,
2477 .set_settings = rtl8139_set_settings,
2478 .get_regs_len = rtl8139_get_regs_len,
2479 .get_regs = rtl8139_get_regs,
2480 .nway_reset = rtl8139_nway_reset,
2481 .get_link = rtl8139_get_link,
2482 .get_msglevel = rtl8139_get_msglevel,
2483 .set_msglevel = rtl8139_set_msglevel,
2484 .get_wol = rtl8139_get_wol,
2485 .set_wol = rtl8139_set_wol,
2486 .get_strings = rtl8139_get_strings,
2487 .get_sset_count = rtl8139_get_sset_count,
2488 .get_ethtool_stats = rtl8139_get_ethtool_stats,
2489 };
2490
2491 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2492 {
2493 struct rtl8139_private *tp = netdev_priv(dev);
2494 int rc;
2495
2496 if (!netif_running(dev))
2497 return -EINVAL;
2498
2499 spin_lock_irq(&tp->lock);
2500 rc = generic_mii_ioctl(&tp->mii, if_mii(rq), cmd, NULL);
2501 spin_unlock_irq(&tp->lock);
2502
2503 return rc;
2504 }
2505
2506
2507 static struct rtnl_link_stats64 *
2508 rtl8139_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
2509 {
2510 struct rtl8139_private *tp = netdev_priv(dev);
2511 void __iomem *ioaddr = tp->mmio_addr;
2512 unsigned long flags;
2513 unsigned int start;
2514
2515 if (netif_running(dev)) {
2516 spin_lock_irqsave (&tp->lock, flags);
2517 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2518 RTL_W32 (RxMissed, 0);
2519 spin_unlock_irqrestore (&tp->lock, flags);
2520 }
2521
2522 netdev_stats_to_stats64(stats, &dev->stats);
2523
2524 do {
2525 start = u64_stats_fetch_begin_irq(&tp->rx_stats.syncp);
2526 stats->rx_packets = tp->rx_stats.packets;
2527 stats->rx_bytes = tp->rx_stats.bytes;
2528 } while (u64_stats_fetch_retry_irq(&tp->rx_stats.syncp, start));
2529
2530 do {
2531 start = u64_stats_fetch_begin_irq(&tp->tx_stats.syncp);
2532 stats->tx_packets = tp->tx_stats.packets;
2533 stats->tx_bytes = tp->tx_stats.bytes;
2534 } while (u64_stats_fetch_retry_irq(&tp->tx_stats.syncp, start));
2535
2536 return stats;
2537 }
2538
2539 /* Set or clear the multicast filter for this adaptor.
2540 This routine is not state sensitive and need not be SMP locked. */
2541
2542 static void __set_rx_mode (struct net_device *dev)
2543 {
2544 struct rtl8139_private *tp = netdev_priv(dev);
2545 void __iomem *ioaddr = tp->mmio_addr;
2546 u32 mc_filter[2]; /* Multicast hash filter */
2547 int rx_mode;
2548 u32 tmp;
2549
2550 netdev_dbg(dev, "rtl8139_set_rx_mode(%04x) done -- Rx config %08x\n",
2551 dev->flags, RTL_R32(RxConfig));
2552
2553 /* Note: do not reorder, GCC is clever about common statements. */
2554 if (dev->flags & IFF_PROMISC) {
2555 rx_mode =
2556 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
2557 AcceptAllPhys;
2558 mc_filter[1] = mc_filter[0] = 0xffffffff;
2559 } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
2560 (dev->flags & IFF_ALLMULTI)) {
2561 /* Too many to filter perfectly -- accept all multicasts. */
2562 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
2563 mc_filter[1] = mc_filter[0] = 0xffffffff;
2564 } else {
2565 struct netdev_hw_addr *ha;
2566 rx_mode = AcceptBroadcast | AcceptMyPhys;
2567 mc_filter[1] = mc_filter[0] = 0;
2568 netdev_for_each_mc_addr(ha, dev) {
2569 int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
2570
2571 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
2572 rx_mode |= AcceptMulticast;
2573 }
2574 }
2575
2576 if (dev->features & NETIF_F_RXALL)
2577 rx_mode |= (AcceptErr | AcceptRunt);
2578
2579 /* We can safely update without stopping the chip. */
2580 tmp = rtl8139_rx_config | rx_mode;
2581 if (tp->rx_config != tmp) {
2582 RTL_W32_F (RxConfig, tmp);
2583 tp->rx_config = tmp;
2584 }
2585 RTL_W32_F (MAR0 + 0, mc_filter[0]);
2586 RTL_W32_F (MAR0 + 4, mc_filter[1]);
2587 }
2588
2589 static void rtl8139_set_rx_mode (struct net_device *dev)
2590 {
2591 unsigned long flags;
2592 struct rtl8139_private *tp = netdev_priv(dev);
2593
2594 spin_lock_irqsave (&tp->lock, flags);
2595 __set_rx_mode(dev);
2596 spin_unlock_irqrestore (&tp->lock, flags);
2597 }
2598
2599 #ifdef CONFIG_PM
2600
2601 static int rtl8139_suspend (struct pci_dev *pdev, pm_message_t state)
2602 {
2603 struct net_device *dev = pci_get_drvdata (pdev);
2604 struct rtl8139_private *tp = netdev_priv(dev);
2605 void __iomem *ioaddr = tp->mmio_addr;
2606 unsigned long flags;
2607
2608 pci_save_state (pdev);
2609
2610 if (!netif_running (dev))
2611 return 0;
2612
2613 netif_device_detach (dev);
2614
2615 spin_lock_irqsave (&tp->lock, flags);
2616
2617 /* Disable interrupts, stop Tx and Rx. */
2618 RTL_W16 (IntrMask, 0);
2619 RTL_W8 (ChipCmd, 0);
2620
2621 /* Update the error counts. */
2622 dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2623 RTL_W32 (RxMissed, 0);
2624
2625 spin_unlock_irqrestore (&tp->lock, flags);
2626
2627 pci_set_power_state (pdev, PCI_D3hot);
2628
2629 return 0;
2630 }
2631
2632
2633 static int rtl8139_resume (struct pci_dev *pdev)
2634 {
2635 struct net_device *dev = pci_get_drvdata (pdev);
2636
2637 pci_restore_state (pdev);
2638 if (!netif_running (dev))
2639 return 0;
2640 pci_set_power_state (pdev, PCI_D0);
2641 rtl8139_init_ring (dev);
2642 rtl8139_hw_start (dev);
2643 netif_device_attach (dev);
2644 return 0;
2645 }
2646
2647 #endif /* CONFIG_PM */
2648
2649
2650 static struct pci_driver rtl8139_pci_driver = {
2651 .name = DRV_NAME,
2652 .id_table = rtl8139_pci_tbl,
2653 .probe = rtl8139_init_one,
2654 .remove = rtl8139_remove_one,
2655 #ifdef CONFIG_PM
2656 .suspend = rtl8139_suspend,
2657 .resume = rtl8139_resume,
2658 #endif /* CONFIG_PM */
2659 };
2660
2661
2662 static int __init rtl8139_init_module (void)
2663 {
2664 /* when we're a module, we always print a version message,
2665 * even if no 8139 board is found.
2666 */
2667 #ifdef MODULE
2668 pr_info(RTL8139_DRIVER_NAME "\n");
2669 #endif
2670
2671 return pci_register_driver(&rtl8139_pci_driver);
2672 }
2673
2674
2675 static void __exit rtl8139_cleanup_module (void)
2676 {
2677 pci_unregister_driver (&rtl8139_pci_driver);
2678 }
2679
2680
2681 module_init(rtl8139_init_module);
2682 module_exit(rtl8139_cleanup_module);
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