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[PATCH] net, 8139too.c: fix netpoll deadlock
[linux-2.6/linux-2.6-openrd.git] / drivers / net / 8139too.c
blob35ad5cff18e65936862c20276de4468189a12568
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 DRV_NAME "8139too"
93 #define DRV_VERSION "0.9.28"
94
95
96 #include <linux/module.h>
97 #include <linux/kernel.h>
98 #include <linux/compiler.h>
99 #include <linux/pci.h>
100 #include <linux/init.h>
101 #include <linux/ioport.h>
102 #include <linux/netdevice.h>
103 #include <linux/etherdevice.h>
104 #include <linux/rtnetlink.h>
105 #include <linux/delay.h>
106 #include <linux/ethtool.h>
107 #include <linux/mii.h>
108 #include <linux/completion.h>
109 #include <linux/crc32.h>
110 #include <asm/io.h>
111 #include <asm/uaccess.h>
112 #include <asm/irq.h>
113
114 #define RTL8139_DRIVER_NAME DRV_NAME " Fast Ethernet driver " DRV_VERSION
115 #define PFX DRV_NAME ": "
116
117 /* Default Message level */
118 #define RTL8139_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
119 NETIF_MSG_PROBE | \
120 NETIF_MSG_LINK)
121
122
123 /* enable PIO instead of MMIO, if CONFIG_8139TOO_PIO is selected */
124 #ifdef CONFIG_8139TOO_PIO
125 #define USE_IO_OPS 1
126 #endif
127
128 /* define to 1, 2 or 3 to enable copious debugging info */
129 #define RTL8139_DEBUG 0
130
131 /* define to 1 to disable lightweight runtime debugging checks */
132 #undef RTL8139_NDEBUG
133
134
135 #if RTL8139_DEBUG
136 /* note: prints function name for you */
137 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
138 #else
139 # define DPRINTK(fmt, args...)
140 #endif
141
142 #ifdef RTL8139_NDEBUG
143 # define assert(expr) do {} while (0)
144 #else
145 # define assert(expr) \
146 if(unlikely(!(expr))) { \
147 printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
148 #expr,__FILE__,__FUNCTION__,__LINE__); \
149 }
150 #endif
151
152
153 /* A few user-configurable values. */
154 /* media options */
155 #define MAX_UNITS 8
156 static int media[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
157 static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
158
159 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
160 The RTL chips use a 64 element hash table based on the Ethernet CRC. */
161 static int multicast_filter_limit = 32;
162
163 /* bitmapped message enable number */
164 static int debug = -1;
165
166 /*
167 * Receive ring size
168 * Warning: 64K ring has hardware issues and may lock up.
169 */
170 #if defined(CONFIG_SH_DREAMCAST)
171 #define RX_BUF_IDX 1 /* 16K ring */
172 #else
173 #define RX_BUF_IDX 2 /* 32K ring */
174 #endif
175 #define RX_BUF_LEN (8192 << RX_BUF_IDX)
176 #define RX_BUF_PAD 16
177 #define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
178
179 #if RX_BUF_LEN == 65536
180 #define RX_BUF_TOT_LEN RX_BUF_LEN
181 #else
182 #define RX_BUF_TOT_LEN (RX_BUF_LEN + RX_BUF_PAD + RX_BUF_WRAP_PAD)
183 #endif
184
185 /* Number of Tx descriptor registers. */
186 #define NUM_TX_DESC 4
187
188 /* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
189 #define MAX_ETH_FRAME_SIZE 1536
190
191 /* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */
192 #define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
193 #define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
194
195 /* PCI Tuning Parameters
196 Threshold is bytes transferred to chip before transmission starts. */
197 #define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */
198
199 /* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
200 #define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */
201 #define RX_DMA_BURST 7 /* Maximum PCI burst, '6' is 1024 */
202 #define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
203 #define TX_RETRY 8 /* 0-15. retries = 16 + (TX_RETRY * 16) */
204
205 /* Operational parameters that usually are not changed. */
206 /* Time in jiffies before concluding the transmitter is hung. */
207 #define TX_TIMEOUT (6*HZ)
208
209
210 enum {
211 HAS_MII_XCVR = 0x010000,
212 HAS_CHIP_XCVR = 0x020000,
213 HAS_LNK_CHNG = 0x040000,
214 };
215
216 #define RTL_NUM_STATS 4 /* number of ETHTOOL_GSTATS u64's */
217 #define RTL_REGS_VER 1 /* version of reg. data in ETHTOOL_GREGS */
218 #define RTL_MIN_IO_SIZE 0x80
219 #define RTL8139B_IO_SIZE 256
220
221 #define RTL8129_CAPS HAS_MII_XCVR
222 #define RTL8139_CAPS HAS_CHIP_XCVR|HAS_LNK_CHNG
223
224 typedef enum {
225 RTL8139 = 0,
226 RTL8129,
227 } board_t;
228
229
230 /* indexed by board_t, above */
231 static const struct {
232 const char *name;
233 u32 hw_flags;
234 } board_info[] __devinitdata = {
235 { "RealTek RTL8139", RTL8139_CAPS },
236 { "RealTek RTL8129", RTL8129_CAPS },
237 };
238
239
240 static struct pci_device_id rtl8139_pci_tbl[] = {
241 {0x10ec, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
242 {0x10ec, 0x8138, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
243 {0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
244 {0x1500, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
245 {0x4033, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
246 {0x1186, 0x1300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
247 {0x1186, 0x1340, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
248 {0x13d1, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
249 {0x1259, 0xa117, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
250 {0x1259, 0xa11e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
251 {0x14ea, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
252 {0x14ea, 0xab07, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
253 {0x11db, 0x1234, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
254 {0x1432, 0x9130, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
255 {0x02ac, 0x1012, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
256 {0x018a, 0x0106, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
257 {0x126c, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
258 {0x1743, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
259 {0x021b, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
260
261 #ifdef CONFIG_SH_SECUREEDGE5410
262 /* Bogus 8139 silicon reports 8129 without external PROM :-( */
263 {0x10ec, 0x8129, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
264 #endif
265 #ifdef CONFIG_8139TOO_8129
266 {0x10ec, 0x8129, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8129 },
267 #endif
268
269 /* some crazy cards report invalid vendor ids like
270 * 0x0001 here. The other ids are valid and constant,
271 * so we simply don't match on the main vendor id.
272 */
273 {PCI_ANY_ID, 0x8139, 0x10ec, 0x8139, 0, 0, RTL8139 },
274 {PCI_ANY_ID, 0x8139, 0x1186, 0x1300, 0, 0, RTL8139 },
275 {PCI_ANY_ID, 0x8139, 0x13d1, 0xab06, 0, 0, RTL8139 },
276
277 {0,}
278 };
279 MODULE_DEVICE_TABLE (pci, rtl8139_pci_tbl);
280
281 static struct {
282 const char str[ETH_GSTRING_LEN];
283 } ethtool_stats_keys[] = {
284 { "early_rx" },
285 { "tx_buf_mapped" },
286 { "tx_timeouts" },
287 { "rx_lost_in_ring" },
288 };
289
290 /* The rest of these values should never change. */
291
292 /* Symbolic offsets to registers. */
293 enum RTL8139_registers {
294 MAC0 = 0, /* Ethernet hardware address. */
295 MAR0 = 8, /* Multicast filter. */
296 TxStatus0 = 0x10, /* Transmit status (Four 32bit registers). */
297 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
298 RxBuf = 0x30,
299 ChipCmd = 0x37,
300 RxBufPtr = 0x38,
301 RxBufAddr = 0x3A,
302 IntrMask = 0x3C,
303 IntrStatus = 0x3E,
304 TxConfig = 0x40,
305 RxConfig = 0x44,
306 Timer = 0x48, /* A general-purpose counter. */
307 RxMissed = 0x4C, /* 24 bits valid, write clears. */
308 Cfg9346 = 0x50,
309 Config0 = 0x51,
310 Config1 = 0x52,
311 FlashReg = 0x54,
312 MediaStatus = 0x58,
313 Config3 = 0x59,
314 Config4 = 0x5A, /* absent on RTL-8139A */
315 HltClk = 0x5B,
316 MultiIntr = 0x5C,
317 TxSummary = 0x60,
318 BasicModeCtrl = 0x62,
319 BasicModeStatus = 0x64,
320 NWayAdvert = 0x66,
321 NWayLPAR = 0x68,
322 NWayExpansion = 0x6A,
323 /* Undocumented registers, but required for proper operation. */
324 FIFOTMS = 0x70, /* FIFO Control and test. */
325 CSCR = 0x74, /* Chip Status and Configuration Register. */
326 PARA78 = 0x78,
327 PARA7c = 0x7c, /* Magic transceiver parameter register. */
328 Config5 = 0xD8, /* absent on RTL-8139A */
329 };
330
331 enum ClearBitMasks {
332 MultiIntrClear = 0xF000,
333 ChipCmdClear = 0xE2,
334 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
335 };
336
337 enum ChipCmdBits {
338 CmdReset = 0x10,
339 CmdRxEnb = 0x08,
340 CmdTxEnb = 0x04,
341 RxBufEmpty = 0x01,
342 };
343
344 /* Interrupt register bits, using my own meaningful names. */
345 enum IntrStatusBits {
346 PCIErr = 0x8000,
347 PCSTimeout = 0x4000,
348 RxFIFOOver = 0x40,
349 RxUnderrun = 0x20,
350 RxOverflow = 0x10,
351 TxErr = 0x08,
352 TxOK = 0x04,
353 RxErr = 0x02,
354 RxOK = 0x01,
355
356 RxAckBits = RxFIFOOver | RxOverflow | RxOK,
357 };
358
359 enum TxStatusBits {
360 TxHostOwns = 0x2000,
361 TxUnderrun = 0x4000,
362 TxStatOK = 0x8000,
363 TxOutOfWindow = 0x20000000,
364 TxAborted = 0x40000000,
365 TxCarrierLost = 0x80000000,
366 };
367 enum RxStatusBits {
368 RxMulticast = 0x8000,
369 RxPhysical = 0x4000,
370 RxBroadcast = 0x2000,
371 RxBadSymbol = 0x0020,
372 RxRunt = 0x0010,
373 RxTooLong = 0x0008,
374 RxCRCErr = 0x0004,
375 RxBadAlign = 0x0002,
376 RxStatusOK = 0x0001,
377 };
378
379 /* Bits in RxConfig. */
380 enum rx_mode_bits {
381 AcceptErr = 0x20,
382 AcceptRunt = 0x10,
383 AcceptBroadcast = 0x08,
384 AcceptMulticast = 0x04,
385 AcceptMyPhys = 0x02,
386 AcceptAllPhys = 0x01,
387 };
388
389 /* Bits in TxConfig. */
390 enum tx_config_bits {
391
392 /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
393 TxIFGShift = 24,
394 TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
395 TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
396 TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
397 TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
398
399 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
400 TxCRC = (1 << 16), /* DISABLE appending CRC to end of Tx packets */
401 TxClearAbt = (1 << 0), /* Clear abort (WO) */
402 TxDMAShift = 8, /* DMA burst value (0-7) is shifted this many bits */
403 TxRetryShift = 4, /* TXRR value (0-15) is shifted this many bits */
404
405 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
406 };
407
408 /* Bits in Config1 */
409 enum Config1Bits {
410 Cfg1_PM_Enable = 0x01,
411 Cfg1_VPD_Enable = 0x02,
412 Cfg1_PIO = 0x04,
413 Cfg1_MMIO = 0x08,
414 LWAKE = 0x10, /* not on 8139, 8139A */
415 Cfg1_Driver_Load = 0x20,
416 Cfg1_LED0 = 0x40,
417 Cfg1_LED1 = 0x80,
418 SLEEP = (1 << 1), /* only on 8139, 8139A */
419 PWRDN = (1 << 0), /* only on 8139, 8139A */
420 };
421
422 /* Bits in Config3 */
423 enum Config3Bits {
424 Cfg3_FBtBEn = (1 << 0), /* 1 = Fast Back to Back */
425 Cfg3_FuncRegEn = (1 << 1), /* 1 = enable CardBus Function registers */
426 Cfg3_CLKRUN_En = (1 << 2), /* 1 = enable CLKRUN */
427 Cfg3_CardB_En = (1 << 3), /* 1 = enable CardBus registers */
428 Cfg3_LinkUp = (1 << 4), /* 1 = wake up on link up */
429 Cfg3_Magic = (1 << 5), /* 1 = wake up on Magic Packet (tm) */
430 Cfg3_PARM_En = (1 << 6), /* 0 = software can set twister parameters */
431 Cfg3_GNTSel = (1 << 7), /* 1 = delay 1 clock from PCI GNT signal */
432 };
433
434 /* Bits in Config4 */
435 enum Config4Bits {
436 LWPTN = (1 << 2), /* not on 8139, 8139A */
437 };
438
439 /* Bits in Config5 */
440 enum Config5Bits {
441 Cfg5_PME_STS = (1 << 0), /* 1 = PCI reset resets PME_Status */
442 Cfg5_LANWake = (1 << 1), /* 1 = enable LANWake signal */
443 Cfg5_LDPS = (1 << 2), /* 0 = save power when link is down */
444 Cfg5_FIFOAddrPtr = (1 << 3), /* Realtek internal SRAM testing */
445 Cfg5_UWF = (1 << 4), /* 1 = accept unicast wakeup frame */
446 Cfg5_MWF = (1 << 5), /* 1 = accept multicast wakeup frame */
447 Cfg5_BWF = (1 << 6), /* 1 = accept broadcast wakeup frame */
448 };
449
450 enum RxConfigBits {
451 /* rx fifo threshold */
452 RxCfgFIFOShift = 13,
453 RxCfgFIFONone = (7 << RxCfgFIFOShift),
454
455 /* Max DMA burst */
456 RxCfgDMAShift = 8,
457 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
458
459 /* rx ring buffer length */
460 RxCfgRcv8K = 0,
461 RxCfgRcv16K = (1 << 11),
462 RxCfgRcv32K = (1 << 12),
463 RxCfgRcv64K = (1 << 11) | (1 << 12),
464
465 /* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
466 RxNoWrap = (1 << 7),
467 };
468
469 /* Twister tuning parameters from RealTek.
470 Completely undocumented, but required to tune bad links on some boards. */
471 enum CSCRBits {
472 CSCR_LinkOKBit = 0x0400,
473 CSCR_LinkChangeBit = 0x0800,
474 CSCR_LinkStatusBits = 0x0f000,
475 CSCR_LinkDownOffCmd = 0x003c0,
476 CSCR_LinkDownCmd = 0x0f3c0,
477 };
478
479 enum Cfg9346Bits {
480 Cfg9346_Lock = 0x00,
481 Cfg9346_Unlock = 0xC0,
482 };
483
484 typedef enum {
485 CH_8139 = 0,
486 CH_8139_K,
487 CH_8139A,
488 CH_8139A_G,
489 CH_8139B,
490 CH_8130,
491 CH_8139C,
492 CH_8100,
493 CH_8100B_8139D,
494 CH_8101,
495 } chip_t;
496
497 enum chip_flags {
498 HasHltClk = (1 << 0),
499 HasLWake = (1 << 1),
500 };
501
502 #define HW_REVID(b30, b29, b28, b27, b26, b23, b22) \
503 (b30<<30 | b29<<29 | b28<<28 | b27<<27 | b26<<26 | b23<<23 | b22<<22)
504 #define HW_REVID_MASK HW_REVID(1, 1, 1, 1, 1, 1, 1)
505
506 /* directly indexed by chip_t, above */
507 static const struct {
508 const char *name;
509 u32 version; /* from RTL8139C/RTL8139D docs */
510 u32 flags;
511 } rtl_chip_info[] = {
512 { "RTL-8139",
513 HW_REVID(1, 0, 0, 0, 0, 0, 0),
514 HasHltClk,
515 },
516
517 { "RTL-8139 rev K",
518 HW_REVID(1, 1, 0, 0, 0, 0, 0),
519 HasHltClk,
520 },
521
522 { "RTL-8139A",
523 HW_REVID(1, 1, 1, 0, 0, 0, 0),
524 HasHltClk, /* XXX undocumented? */
525 },
526
527 { "RTL-8139A rev G",
528 HW_REVID(1, 1, 1, 0, 0, 1, 0),
529 HasHltClk, /* XXX undocumented? */
530 },
531
532 { "RTL-8139B",
533 HW_REVID(1, 1, 1, 1, 0, 0, 0),
534 HasLWake,
535 },
536
537 { "RTL-8130",
538 HW_REVID(1, 1, 1, 1, 1, 0, 0),
539 HasLWake,
540 },
541
542 { "RTL-8139C",
543 HW_REVID(1, 1, 1, 0, 1, 0, 0),
544 HasLWake,
545 },
546
547 { "RTL-8100",
548 HW_REVID(1, 1, 1, 1, 0, 1, 0),
549 HasLWake,
550 },
551
552 { "RTL-8100B/8139D",
553 HW_REVID(1, 1, 1, 0, 1, 0, 1),
554 HasHltClk /* XXX undocumented? */
555 | HasLWake,
556 },
557
558 { "RTL-8101",
559 HW_REVID(1, 1, 1, 0, 1, 1, 1),
560 HasLWake,
561 },
562 };
563
564 struct rtl_extra_stats {
565 unsigned long early_rx;
566 unsigned long tx_buf_mapped;
567 unsigned long tx_timeouts;
568 unsigned long rx_lost_in_ring;
569 };
570
571 struct rtl8139_private {
572 void __iomem *mmio_addr;
573 int drv_flags;
574 struct pci_dev *pci_dev;
575 u32 msg_enable;
576 struct net_device_stats stats;
577 unsigned char *rx_ring;
578 unsigned int cur_rx; /* Index into the Rx buffer of next Rx pkt. */
579 unsigned int tx_flag;
580 unsigned long cur_tx;
581 unsigned long dirty_tx;
582 unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
583 unsigned char *tx_bufs; /* Tx bounce buffer region. */
584 dma_addr_t rx_ring_dma;
585 dma_addr_t tx_bufs_dma;
586 signed char phys[4]; /* MII device addresses. */
587 char twistie, twist_row, twist_col; /* Twister tune state. */
588 unsigned int watchdog_fired : 1;
589 unsigned int default_port : 4; /* Last dev->if_port value. */
590 unsigned int have_thread : 1;
591 spinlock_t lock;
592 spinlock_t rx_lock;
593 chip_t chipset;
594 u32 rx_config;
595 struct rtl_extra_stats xstats;
596
597 struct delayed_work thread;
598
599 struct mii_if_info mii;
600 unsigned int regs_len;
601 unsigned long fifo_copy_timeout;
602 };
603
604 MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
605 MODULE_DESCRIPTION ("RealTek RTL-8139 Fast Ethernet driver");
606 MODULE_LICENSE("GPL");
607 MODULE_VERSION(DRV_VERSION);
608
609 module_param(multicast_filter_limit, int, 0);
610 module_param_array(media, int, NULL, 0);
611 module_param_array(full_duplex, int, NULL, 0);
612 module_param(debug, int, 0);
613 MODULE_PARM_DESC (debug, "8139too bitmapped message enable number");
614 MODULE_PARM_DESC (multicast_filter_limit, "8139too maximum number of filtered multicast addresses");
615 MODULE_PARM_DESC (media, "8139too: Bits 4+9: force full duplex, bit 5: 100Mbps");
616 MODULE_PARM_DESC (full_duplex, "8139too: Force full duplex for board(s) (1)");
617
618 static int read_eeprom (void __iomem *ioaddr, int location, int addr_len);
619 static int rtl8139_open (struct net_device *dev);
620 static int mdio_read (struct net_device *dev, int phy_id, int location);
621 static void mdio_write (struct net_device *dev, int phy_id, int location,
622 int val);
623 static void rtl8139_start_thread(struct rtl8139_private *tp);
624 static void rtl8139_tx_timeout (struct net_device *dev);
625 static void rtl8139_init_ring (struct net_device *dev);
626 static int rtl8139_start_xmit (struct sk_buff *skb,
627 struct net_device *dev);
628 static int rtl8139_poll(struct net_device *dev, int *budget);
629 #ifdef CONFIG_NET_POLL_CONTROLLER
630 static void rtl8139_poll_controller(struct net_device *dev);
631 #endif
632 static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance);
633 static int rtl8139_close (struct net_device *dev);
634 static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
635 static struct net_device_stats *rtl8139_get_stats (struct net_device *dev);
636 static void rtl8139_set_rx_mode (struct net_device *dev);
637 static void __set_rx_mode (struct net_device *dev);
638 static void rtl8139_hw_start (struct net_device *dev);
639 static void rtl8139_thread (struct work_struct *work);
640 static void rtl8139_tx_timeout_task(struct work_struct *work);
641 static const struct ethtool_ops rtl8139_ethtool_ops;
642
643 /* write MMIO register, with flush */
644 /* Flush avoids rtl8139 bug w/ posted MMIO writes */
645 #define RTL_W8_F(reg, val8) do { iowrite8 ((val8), ioaddr + (reg)); ioread8 (ioaddr + (reg)); } while (0)
646 #define RTL_W16_F(reg, val16) do { iowrite16 ((val16), ioaddr + (reg)); ioread16 (ioaddr + (reg)); } while (0)
647 #define RTL_W32_F(reg, val32) do { iowrite32 ((val32), ioaddr + (reg)); ioread32 (ioaddr + (reg)); } while (0)
648
649
650 #define MMIO_FLUSH_AUDIT_COMPLETE 1
651 #if MMIO_FLUSH_AUDIT_COMPLETE
652
653 /* write MMIO register */
654 #define RTL_W8(reg, val8) iowrite8 ((val8), ioaddr + (reg))
655 #define RTL_W16(reg, val16) iowrite16 ((val16), ioaddr + (reg))
656 #define RTL_W32(reg, val32) iowrite32 ((val32), ioaddr + (reg))
657
658 #else
659
660 /* write MMIO register, then flush */
661 #define RTL_W8 RTL_W8_F
662 #define RTL_W16 RTL_W16_F
663 #define RTL_W32 RTL_W32_F
664
665 #endif /* MMIO_FLUSH_AUDIT_COMPLETE */
666
667 /* read MMIO register */
668 #define RTL_R8(reg) ioread8 (ioaddr + (reg))
669 #define RTL_R16(reg) ioread16 (ioaddr + (reg))
670 #define RTL_R32(reg) ((unsigned long) ioread32 (ioaddr + (reg)))
671
672
673 static const u16 rtl8139_intr_mask =
674 PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
675 TxErr | TxOK | RxErr | RxOK;
676
677 static const u16 rtl8139_norx_intr_mask =
678 PCIErr | PCSTimeout | RxUnderrun |
679 TxErr | TxOK | RxErr ;
680
681 #if RX_BUF_IDX == 0
682 static const unsigned int rtl8139_rx_config =
683 RxCfgRcv8K | RxNoWrap |
684 (RX_FIFO_THRESH << RxCfgFIFOShift) |
685 (RX_DMA_BURST << RxCfgDMAShift);
686 #elif RX_BUF_IDX == 1
687 static const unsigned int rtl8139_rx_config =
688 RxCfgRcv16K | RxNoWrap |
689 (RX_FIFO_THRESH << RxCfgFIFOShift) |
690 (RX_DMA_BURST << RxCfgDMAShift);
691 #elif RX_BUF_IDX == 2
692 static const unsigned int rtl8139_rx_config =
693 RxCfgRcv32K | RxNoWrap |
694 (RX_FIFO_THRESH << RxCfgFIFOShift) |
695 (RX_DMA_BURST << RxCfgDMAShift);
696 #elif RX_BUF_IDX == 3
697 static const unsigned int rtl8139_rx_config =
698 RxCfgRcv64K |
699 (RX_FIFO_THRESH << RxCfgFIFOShift) |
700 (RX_DMA_BURST << RxCfgDMAShift);
701 #else
702 #error "Invalid configuration for 8139_RXBUF_IDX"
703 #endif
704
705 static const unsigned int rtl8139_tx_config =
706 TxIFG96 | (TX_DMA_BURST << TxDMAShift) | (TX_RETRY << TxRetryShift);
707
708 static void __rtl8139_cleanup_dev (struct net_device *dev)
709 {
710 struct rtl8139_private *tp = netdev_priv(dev);
711 struct pci_dev *pdev;
712
713 assert (dev != NULL);
714 assert (tp->pci_dev != NULL);
715 pdev = tp->pci_dev;
716
717 #ifdef USE_IO_OPS
718 if (tp->mmio_addr)
719 ioport_unmap (tp->mmio_addr);
720 #else
721 if (tp->mmio_addr)
722 pci_iounmap (pdev, tp->mmio_addr);
723 #endif /* USE_IO_OPS */
724
725 /* it's ok to call this even if we have no regions to free */
726 pci_release_regions (pdev);
727
728 free_netdev(dev);
729 pci_set_drvdata (pdev, NULL);
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 int __devinit rtl8139_init_board (struct pci_dev *pdev,
751 struct net_device **dev_out)
752 {
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;
759 unsigned long pio_start, pio_end, pio_flags, pio_len;
760 unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
761 u32 version;
762
763 assert (pdev != NULL);
764
765 *dev_out = NULL;
766
767 /* dev and priv zeroed in alloc_etherdev */
768 dev = alloc_etherdev (sizeof (*tp));
769 if (dev == NULL) {
770 dev_err(&pdev->dev, "Unable to alloc new net device\n");
771 return -ENOMEM;
772 }
773 SET_MODULE_OWNER(dev);
774 SET_NETDEV_DEV(dev, &pdev->dev);
775
776 tp = netdev_priv(dev);
777 tp->pci_dev = pdev;
778
779 /* enable device (incl. PCI PM wakeup and hotplug setup) */
780 rc = pci_enable_device (pdev);
781 if (rc)
782 goto err_out;
783
784 pio_start = pci_resource_start (pdev, 0);
785 pio_end = pci_resource_end (pdev, 0);
786 pio_flags = pci_resource_flags (pdev, 0);
787 pio_len = pci_resource_len (pdev, 0);
788
789 mmio_start = pci_resource_start (pdev, 1);
790 mmio_end = pci_resource_end (pdev, 1);
791 mmio_flags = pci_resource_flags (pdev, 1);
792 mmio_len = pci_resource_len (pdev, 1);
793
794 /* set this immediately, we need to know before
795 * we talk to the chip directly */
796 DPRINTK("PIO region size == 0x%02X\n", pio_len);
797 DPRINTK("MMIO region size == 0x%02lX\n", mmio_len);
798
799 #ifdef USE_IO_OPS
800 /* make sure PCI base addr 0 is PIO */
801 if (!(pio_flags & IORESOURCE_IO)) {
802 dev_err(&pdev->dev, "region #0 not a PIO resource, aborting\n");
803 rc = -ENODEV;
804 goto err_out;
805 }
806 /* check for weird/broken PCI region reporting */
807 if (pio_len < RTL_MIN_IO_SIZE) {
808 dev_err(&pdev->dev, "Invalid PCI I/O region size(s), aborting\n");
809 rc = -ENODEV;
810 goto err_out;
811 }
812 #else
813 /* make sure PCI base addr 1 is MMIO */
814 if (!(mmio_flags & IORESOURCE_MEM)) {
815 dev_err(&pdev->dev, "region #1 not an MMIO resource, aborting\n");
816 rc = -ENODEV;
817 goto err_out;
818 }
819 if (mmio_len < RTL_MIN_IO_SIZE) {
820 dev_err(&pdev->dev, "Invalid PCI mem region size(s), aborting\n");
821 rc = -ENODEV;
822 goto err_out;
823 }
824 #endif
825
826 rc = pci_request_regions (pdev, DRV_NAME);
827 if (rc)
828 goto err_out;
829 disable_dev_on_err = 1;
830
831 /* enable PCI bus-mastering */
832 pci_set_master (pdev);
833
834 #ifdef USE_IO_OPS
835 ioaddr = ioport_map(pio_start, pio_len);
836 if (!ioaddr) {
837 dev_err(&pdev->dev, "cannot map PIO, aborting\n");
838 rc = -EIO;
839 goto err_out;
840 }
841 dev->base_addr = pio_start;
842 tp->mmio_addr = ioaddr;
843 tp->regs_len = pio_len;
844 #else
845 /* ioremap MMIO region */
846 ioaddr = pci_iomap(pdev, 1, 0);
847 if (ioaddr == NULL) {
848 dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
849 rc = -EIO;
850 goto err_out;
851 }
852 dev->base_addr = (long) ioaddr;
853 tp->mmio_addr = ioaddr;
854 tp->regs_len = mmio_len;
855 #endif /* USE_IO_OPS */
856
857 /* Bring old chips out of low-power mode. */
858 RTL_W8 (HltClk, 'R');
859
860 /* check for missing/broken hardware */
861 if (RTL_R32 (TxConfig) == 0xFFFFFFFF) {
862 dev_err(&pdev->dev, "Chip not responding, ignoring board\n");
863 rc = -EIO;
864 goto err_out;
865 }
866
867 /* identify chip attached to board */
868 version = RTL_R32 (TxConfig) & HW_REVID_MASK;
869 for (i = 0; i < ARRAY_SIZE (rtl_chip_info); i++)
870 if (version == rtl_chip_info[i].version) {
871 tp->chipset = i;
872 goto match;
873 }
874
875 /* if unknown chip, assume array element #0, original RTL-8139 in this case */
876 dev_printk (KERN_DEBUG, &pdev->dev,
877 "unknown chip version, assuming RTL-8139\n");
878 dev_printk (KERN_DEBUG, &pdev->dev,
879 "TxConfig = 0x%lx\n", RTL_R32 (TxConfig));
880 tp->chipset = 0;
881
882 match:
883 DPRINTK ("chipset id (%d) == index %d, '%s'\n",
884 version, i, rtl_chip_info[i].name);
885
886 if (tp->chipset >= CH_8139B) {
887 u8 new_tmp8 = tmp8 = RTL_R8 (Config1);
888 DPRINTK("PCI PM wakeup\n");
889 if ((rtl_chip_info[tp->chipset].flags & HasLWake) &&
890 (tmp8 & LWAKE))
891 new_tmp8 &= ~LWAKE;
892 new_tmp8 |= Cfg1_PM_Enable;
893 if (new_tmp8 != tmp8) {
894 RTL_W8 (Cfg9346, Cfg9346_Unlock);
895 RTL_W8 (Config1, tmp8);
896 RTL_W8 (Cfg9346, Cfg9346_Lock);
897 }
898 if (rtl_chip_info[tp->chipset].flags & HasLWake) {
899 tmp8 = RTL_R8 (Config4);
900 if (tmp8 & LWPTN) {
901 RTL_W8 (Cfg9346, Cfg9346_Unlock);
902 RTL_W8 (Config4, tmp8 & ~LWPTN);
903 RTL_W8 (Cfg9346, Cfg9346_Lock);
904 }
905 }
906 } else {
907 DPRINTK("Old chip wakeup\n");
908 tmp8 = RTL_R8 (Config1);
909 tmp8 &= ~(SLEEP | PWRDN);
910 RTL_W8 (Config1, tmp8);
911 }
912
913 rtl8139_chip_reset (ioaddr);
914
915 *dev_out = dev;
916 return 0;
917
918 err_out:
919 __rtl8139_cleanup_dev (dev);
920 if (disable_dev_on_err)
921 pci_disable_device (pdev);
922 return rc;
923 }
924
925
926 static int __devinit rtl8139_init_one (struct pci_dev *pdev,
927 const struct pci_device_id *ent)
928 {
929 struct net_device *dev = NULL;
930 struct rtl8139_private *tp;
931 int i, addr_len, option;
932 void __iomem *ioaddr;
933 static int board_idx = -1;
934 u8 pci_rev;
935
936 assert (pdev != NULL);
937 assert (ent != NULL);
938
939 board_idx++;
940
941 /* when we're built into the kernel, the driver version message
942 * is only printed if at least one 8139 board has been found
943 */
944 #ifndef MODULE
945 {
946 static int printed_version;
947 if (!printed_version++)
948 printk (KERN_INFO RTL8139_DRIVER_NAME "\n");
949 }
950 #endif
951
952 pci_read_config_byte(pdev, PCI_REVISION_ID, &pci_rev);
953
954 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
955 pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pci_rev >= 0x20) {
956 dev_info(&pdev->dev,
957 "This (id %04x:%04x rev %02x) is an enhanced 8139C+ chip\n",
958 pdev->vendor, pdev->device, pci_rev);
959 dev_info(&pdev->dev,
960 "Use the \"8139cp\" driver for improved performance and stability.\n");
961 }
962
963 i = rtl8139_init_board (pdev, &dev);
964 if (i < 0)
965 return i;
966
967 assert (dev != NULL);
968 tp = netdev_priv(dev);
969
970 ioaddr = tp->mmio_addr;
971 assert (ioaddr != NULL);
972
973 addr_len = read_eeprom (ioaddr, 0, 8) == 0x8129 ? 8 : 6;
974 for (i = 0; i < 3; i++)
975 ((u16 *) (dev->dev_addr))[i] =
976 le16_to_cpu (read_eeprom (ioaddr, i + 7, addr_len));
977 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
978
979 /* The Rtl8139-specific entries in the device structure. */
980 dev->open = rtl8139_open;
981 dev->hard_start_xmit = rtl8139_start_xmit;
982 dev->poll = rtl8139_poll;
983 dev->weight = 64;
984 dev->stop = rtl8139_close;
985 dev->get_stats = rtl8139_get_stats;
986 dev->set_multicast_list = rtl8139_set_rx_mode;
987 dev->do_ioctl = netdev_ioctl;
988 dev->ethtool_ops = &rtl8139_ethtool_ops;
989 dev->tx_timeout = rtl8139_tx_timeout;
990 dev->watchdog_timeo = TX_TIMEOUT;
991 #ifdef CONFIG_NET_POLL_CONTROLLER
992 dev->poll_controller = rtl8139_poll_controller;
993 #endif
994
995 /* note: the hardware is not capable of sg/csum/highdma, however
996 * through the use of skb_copy_and_csum_dev we enable these
997 * features
998 */
999 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
1000
1001 dev->irq = pdev->irq;
1002
1003 /* tp zeroed and aligned in alloc_etherdev */
1004 tp = netdev_priv(dev);
1005
1006 /* note: tp->chipset set in rtl8139_init_board */
1007 tp->drv_flags = board_info[ent->driver_data].hw_flags;
1008 tp->mmio_addr = ioaddr;
1009 tp->msg_enable =
1010 (debug < 0 ? RTL8139_DEF_MSG_ENABLE : ((1 << debug) - 1));
1011 spin_lock_init (&tp->lock);
1012 spin_lock_init (&tp->rx_lock);
1013 INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
1014 tp->mii.dev = dev;
1015 tp->mii.mdio_read = mdio_read;
1016 tp->mii.mdio_write = mdio_write;
1017 tp->mii.phy_id_mask = 0x3f;
1018 tp->mii.reg_num_mask = 0x1f;
1019
1020 /* dev is fully set up and ready to use now */
1021 DPRINTK("about to register device named %s (%p)...\n", dev->name, dev);
1022 i = register_netdev (dev);
1023 if (i) goto err_out;
1024
1025 pci_set_drvdata (pdev, dev);
1026
1027 printk (KERN_INFO "%s: %s at 0x%lx, "
1028 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
1029 "IRQ %d\n",
1030 dev->name,
1031 board_info[ent->driver_data].name,
1032 dev->base_addr,
1033 dev->dev_addr[0], dev->dev_addr[1],
1034 dev->dev_addr[2], dev->dev_addr[3],
1035 dev->dev_addr[4], dev->dev_addr[5],
1036 dev->irq);
1037
1038 printk (KERN_DEBUG "%s: Identified 8139 chip type '%s'\n",
1039 dev->name, rtl_chip_info[tp->chipset].name);
1040
1041 /* Find the connected MII xcvrs.
1042 Doing this in open() would allow detecting external xcvrs later, but
1043 takes too much time. */
1044 #ifdef CONFIG_8139TOO_8129
1045 if (tp->drv_flags & HAS_MII_XCVR) {
1046 int phy, phy_idx = 0;
1047 for (phy = 0; phy < 32 && phy_idx < sizeof(tp->phys); phy++) {
1048 int mii_status = mdio_read(dev, phy, 1);
1049 if (mii_status != 0xffff && mii_status != 0x0000) {
1050 u16 advertising = mdio_read(dev, phy, 4);
1051 tp->phys[phy_idx++] = phy;
1052 printk(KERN_INFO "%s: MII transceiver %d status 0x%4.4x "
1053 "advertising %4.4x.\n",
1054 dev->name, phy, mii_status, advertising);
1055 }
1056 }
1057 if (phy_idx == 0) {
1058 printk(KERN_INFO "%s: No MII transceivers found! Assuming SYM "
1059 "transceiver.\n",
1060 dev->name);
1061 tp->phys[0] = 32;
1062 }
1063 } else
1064 #endif
1065 tp->phys[0] = 32;
1066 tp->mii.phy_id = tp->phys[0];
1067
1068 /* The lower four bits are the media type. */
1069 option = (board_idx >= MAX_UNITS) ? 0 : media[board_idx];
1070 if (option > 0) {
1071 tp->mii.full_duplex = (option & 0x210) ? 1 : 0;
1072 tp->default_port = option & 0xFF;
1073 if (tp->default_port)
1074 tp->mii.force_media = 1;
1075 }
1076 if (board_idx < MAX_UNITS && full_duplex[board_idx] > 0)
1077 tp->mii.full_duplex = full_duplex[board_idx];
1078 if (tp->mii.full_duplex) {
1079 printk(KERN_INFO "%s: Media type forced to Full Duplex.\n", dev->name);
1080 /* Changing the MII-advertised media because might prevent
1081 re-connection. */
1082 tp->mii.force_media = 1;
1083 }
1084 if (tp->default_port) {
1085 printk(KERN_INFO " Forcing %dMbps %s-duplex operation.\n",
1086 (option & 0x20 ? 100 : 10),
1087 (option & 0x10 ? "full" : "half"));
1088 mdio_write(dev, tp->phys[0], 0,
1089 ((option & 0x20) ? 0x2000 : 0) | /* 100Mbps? */
1090 ((option & 0x10) ? 0x0100 : 0)); /* Full duplex? */
1091 }
1092
1093 /* Put the chip into low-power mode. */
1094 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1095 RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
1096
1097 return 0;
1098
1099 err_out:
1100 __rtl8139_cleanup_dev (dev);
1101 pci_disable_device (pdev);
1102 return i;
1103 }
1104
1105
1106 static void __devexit rtl8139_remove_one (struct pci_dev *pdev)
1107 {
1108 struct net_device *dev = pci_get_drvdata (pdev);
1109
1110 assert (dev != NULL);
1111
1112 unregister_netdev (dev);
1113
1114 __rtl8139_cleanup_dev (dev);
1115 pci_disable_device (pdev);
1116 }
1117
1118
1119 /* Serial EEPROM section. */
1120
1121 /* EEPROM_Ctrl bits. */
1122 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
1123 #define EE_CS 0x08 /* EEPROM chip select. */
1124 #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
1125 #define EE_WRITE_0 0x00
1126 #define EE_WRITE_1 0x02
1127 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */
1128 #define EE_ENB (0x80 | EE_CS)
1129
1130 /* Delay between EEPROM clock transitions.
1131 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1132 */
1133
1134 #define eeprom_delay() (void)RTL_R32(Cfg9346)
1135
1136 /* The EEPROM commands include the alway-set leading bit. */
1137 #define EE_WRITE_CMD (5)
1138 #define EE_READ_CMD (6)
1139 #define EE_ERASE_CMD (7)
1140
1141 static int __devinit read_eeprom (void __iomem *ioaddr, int location, int addr_len)
1142 {
1143 int i;
1144 unsigned retval = 0;
1145 int read_cmd = location | (EE_READ_CMD << addr_len);
1146
1147 RTL_W8 (Cfg9346, EE_ENB & ~EE_CS);
1148 RTL_W8 (Cfg9346, EE_ENB);
1149 eeprom_delay ();
1150
1151 /* Shift the read command bits out. */
1152 for (i = 4 + addr_len; i >= 0; i--) {
1153 int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1154 RTL_W8 (Cfg9346, EE_ENB | dataval);
1155 eeprom_delay ();
1156 RTL_W8 (Cfg9346, EE_ENB | dataval | EE_SHIFT_CLK);
1157 eeprom_delay ();
1158 }
1159 RTL_W8 (Cfg9346, EE_ENB);
1160 eeprom_delay ();
1161
1162 for (i = 16; i > 0; i--) {
1163 RTL_W8 (Cfg9346, EE_ENB | EE_SHIFT_CLK);
1164 eeprom_delay ();
1165 retval =
1166 (retval << 1) | ((RTL_R8 (Cfg9346) & EE_DATA_READ) ? 1 :
1167 0);
1168 RTL_W8 (Cfg9346, EE_ENB);
1169 eeprom_delay ();
1170 }
1171
1172 /* Terminate the EEPROM access. */
1173 RTL_W8 (Cfg9346, ~EE_CS);
1174 eeprom_delay ();
1175
1176 return retval;
1177 }
1178
1179 /* MII serial management: mostly bogus for now. */
1180 /* Read and write the MII management registers using software-generated
1181 serial MDIO protocol.
1182 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
1183 met by back-to-back PCI I/O cycles, but we insert a delay to avoid
1184 "overclocking" issues. */
1185 #define MDIO_DIR 0x80
1186 #define MDIO_DATA_OUT 0x04
1187 #define MDIO_DATA_IN 0x02
1188 #define MDIO_CLK 0x01
1189 #define MDIO_WRITE0 (MDIO_DIR)
1190 #define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
1191
1192 #define mdio_delay() RTL_R8(Config4)
1193
1194
1195 static const char mii_2_8139_map[8] = {
1196 BasicModeCtrl,
1197 BasicModeStatus,
1198 0,
1199 0,
1200 NWayAdvert,
1201 NWayLPAR,
1202 NWayExpansion,
1203 0
1204 };
1205
1206
1207 #ifdef CONFIG_8139TOO_8129
1208 /* Syncronize the MII management interface by shifting 32 one bits out. */
1209 static void mdio_sync (void __iomem *ioaddr)
1210 {
1211 int i;
1212
1213 for (i = 32; i >= 0; i--) {
1214 RTL_W8 (Config4, MDIO_WRITE1);
1215 mdio_delay ();
1216 RTL_W8 (Config4, MDIO_WRITE1 | MDIO_CLK);
1217 mdio_delay ();
1218 }
1219 }
1220 #endif
1221
1222 static int mdio_read (struct net_device *dev, int phy_id, int location)
1223 {
1224 struct rtl8139_private *tp = netdev_priv(dev);
1225 int retval = 0;
1226 #ifdef CONFIG_8139TOO_8129
1227 void __iomem *ioaddr = tp->mmio_addr;
1228 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
1229 int i;
1230 #endif
1231
1232 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1233 void __iomem *ioaddr = tp->mmio_addr;
1234 return location < 8 && mii_2_8139_map[location] ?
1235 RTL_R16 (mii_2_8139_map[location]) : 0;
1236 }
1237
1238 #ifdef CONFIG_8139TOO_8129
1239 mdio_sync (ioaddr);
1240 /* Shift the read command bits out. */
1241 for (i = 15; i >= 0; i--) {
1242 int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0;
1243
1244 RTL_W8 (Config4, MDIO_DIR | dataval);
1245 mdio_delay ();
1246 RTL_W8 (Config4, MDIO_DIR | dataval | MDIO_CLK);
1247 mdio_delay ();
1248 }
1249
1250 /* Read the two transition, 16 data, and wire-idle bits. */
1251 for (i = 19; i > 0; i--) {
1252 RTL_W8 (Config4, 0);
1253 mdio_delay ();
1254 retval = (retval << 1) | ((RTL_R8 (Config4) & MDIO_DATA_IN) ? 1 : 0);
1255 RTL_W8 (Config4, MDIO_CLK);
1256 mdio_delay ();
1257 }
1258 #endif
1259
1260 return (retval >> 1) & 0xffff;
1261 }
1262
1263
1264 static void mdio_write (struct net_device *dev, int phy_id, int location,
1265 int value)
1266 {
1267 struct rtl8139_private *tp = netdev_priv(dev);
1268 #ifdef CONFIG_8139TOO_8129
1269 void __iomem *ioaddr = tp->mmio_addr;
1270 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location << 18) | value;
1271 int i;
1272 #endif
1273
1274 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1275 void __iomem *ioaddr = tp->mmio_addr;
1276 if (location == 0) {
1277 RTL_W8 (Cfg9346, Cfg9346_Unlock);
1278 RTL_W16 (BasicModeCtrl, value);
1279 RTL_W8 (Cfg9346, Cfg9346_Lock);
1280 } else if (location < 8 && mii_2_8139_map[location])
1281 RTL_W16 (mii_2_8139_map[location], value);
1282 return;
1283 }
1284
1285 #ifdef CONFIG_8139TOO_8129
1286 mdio_sync (ioaddr);
1287
1288 /* Shift the command bits out. */
1289 for (i = 31; i >= 0; i--) {
1290 int dataval =
1291 (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
1292 RTL_W8 (Config4, dataval);
1293 mdio_delay ();
1294 RTL_W8 (Config4, dataval | MDIO_CLK);
1295 mdio_delay ();
1296 }
1297 /* Clear out extra bits. */
1298 for (i = 2; i > 0; i--) {
1299 RTL_W8 (Config4, 0);
1300 mdio_delay ();
1301 RTL_W8 (Config4, MDIO_CLK);
1302 mdio_delay ();
1303 }
1304 #endif
1305 }
1306
1307
1308 static int rtl8139_open (struct net_device *dev)
1309 {
1310 struct rtl8139_private *tp = netdev_priv(dev);
1311 int retval;
1312 void __iomem *ioaddr = tp->mmio_addr;
1313
1314 retval = request_irq (dev->irq, rtl8139_interrupt, IRQF_SHARED, dev->name, dev);
1315 if (retval)
1316 return retval;
1317
1318 tp->tx_bufs = pci_alloc_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1319 &tp->tx_bufs_dma);
1320 tp->rx_ring = pci_alloc_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1321 &tp->rx_ring_dma);
1322 if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
1323 free_irq(dev->irq, dev);
1324
1325 if (tp->tx_bufs)
1326 pci_free_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1327 tp->tx_bufs, tp->tx_bufs_dma);
1328 if (tp->rx_ring)
1329 pci_free_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1330 tp->rx_ring, tp->rx_ring_dma);
1331
1332 return -ENOMEM;
1333
1334 }
1335
1336 tp->mii.full_duplex = tp->mii.force_media;
1337 tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
1338
1339 rtl8139_init_ring (dev);
1340 rtl8139_hw_start (dev);
1341 netif_start_queue (dev);
1342
1343 if (netif_msg_ifup(tp))
1344 printk(KERN_DEBUG "%s: rtl8139_open() ioaddr %#llx IRQ %d"
1345 " GP Pins %2.2x %s-duplex.\n", dev->name,
1346 (unsigned long long)pci_resource_start (tp->pci_dev, 1),
1347 dev->irq, RTL_R8 (MediaStatus),
1348 tp->mii.full_duplex ? "full" : "half");
1349
1350 rtl8139_start_thread(tp);
1351
1352 return 0;
1353 }
1354
1355
1356 static void rtl_check_media (struct net_device *dev, unsigned int init_media)
1357 {
1358 struct rtl8139_private *tp = netdev_priv(dev);
1359
1360 if (tp->phys[0] >= 0) {
1361 mii_check_media(&tp->mii, netif_msg_link(tp), init_media);
1362 }
1363 }
1364
1365 /* Start the hardware at open or resume. */
1366 static void rtl8139_hw_start (struct net_device *dev)
1367 {
1368 struct rtl8139_private *tp = netdev_priv(dev);
1369 void __iomem *ioaddr = tp->mmio_addr;
1370 u32 i;
1371 u8 tmp;
1372
1373 /* Bring old chips out of low-power mode. */
1374 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1375 RTL_W8 (HltClk, 'R');
1376
1377 rtl8139_chip_reset (ioaddr);
1378
1379 /* unlock Config[01234] and BMCR register writes */
1380 RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1381 /* Restore our idea of the MAC address. */
1382 RTL_W32_F (MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
1383 RTL_W32_F (MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
1384
1385 /* Must enable Tx/Rx before setting transfer thresholds! */
1386 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1387
1388 tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1389 RTL_W32 (RxConfig, tp->rx_config);
1390 RTL_W32 (TxConfig, rtl8139_tx_config);
1391
1392 tp->cur_rx = 0;
1393
1394 rtl_check_media (dev, 1);
1395
1396 if (tp->chipset >= CH_8139B) {
1397 /* Disable magic packet scanning, which is enabled
1398 * when PM is enabled in Config1. It can be reenabled
1399 * via ETHTOOL_SWOL if desired. */
1400 RTL_W8 (Config3, RTL_R8 (Config3) & ~Cfg3_Magic);
1401 }
1402
1403 DPRINTK("init buffer addresses\n");
1404
1405 /* Lock Config[01234] and BMCR register writes */
1406 RTL_W8 (Cfg9346, Cfg9346_Lock);
1407
1408 /* init Rx ring buffer DMA address */
1409 RTL_W32_F (RxBuf, tp->rx_ring_dma);
1410
1411 /* init Tx buffer DMA addresses */
1412 for (i = 0; i < NUM_TX_DESC; i++)
1413 RTL_W32_F (TxAddr0 + (i * 4), tp->tx_bufs_dma + (tp->tx_buf[i] - tp->tx_bufs));
1414
1415 RTL_W32 (RxMissed, 0);
1416
1417 rtl8139_set_rx_mode (dev);
1418
1419 /* no early-rx interrupts */
1420 RTL_W16 (MultiIntr, RTL_R16 (MultiIntr) & MultiIntrClear);
1421
1422 /* make sure RxTx has started */
1423 tmp = RTL_R8 (ChipCmd);
1424 if ((!(tmp & CmdRxEnb)) || (!(tmp & CmdTxEnb)))
1425 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1426
1427 /* Enable all known interrupts by setting the interrupt mask. */
1428 RTL_W16 (IntrMask, rtl8139_intr_mask);
1429 }
1430
1431
1432 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1433 static void rtl8139_init_ring (struct net_device *dev)
1434 {
1435 struct rtl8139_private *tp = netdev_priv(dev);
1436 int i;
1437
1438 tp->cur_rx = 0;
1439 tp->cur_tx = 0;
1440 tp->dirty_tx = 0;
1441
1442 for (i = 0; i < NUM_TX_DESC; i++)
1443 tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
1444 }
1445
1446
1447 /* This must be global for CONFIG_8139TOO_TUNE_TWISTER case */
1448 static int next_tick = 3 * HZ;
1449
1450 #ifndef CONFIG_8139TOO_TUNE_TWISTER
1451 static inline void rtl8139_tune_twister (struct net_device *dev,
1452 struct rtl8139_private *tp) {}
1453 #else
1454 enum TwisterParamVals {
1455 PARA78_default = 0x78fa8388,
1456 PARA7c_default = 0xcb38de43, /* param[0][3] */
1457 PARA7c_xxx = 0xcb38de43,
1458 };
1459
1460 static const unsigned long param[4][4] = {
1461 {0xcb39de43, 0xcb39ce43, 0xfb38de03, 0xcb38de43},
1462 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1463 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1464 {0xbb39de43, 0xbb39ce43, 0xbb39ce83, 0xbb39ce83}
1465 };
1466
1467 static void rtl8139_tune_twister (struct net_device *dev,
1468 struct rtl8139_private *tp)
1469 {
1470 int linkcase;
1471 void __iomem *ioaddr = tp->mmio_addr;
1472
1473 /* This is a complicated state machine to configure the "twister" for
1474 impedance/echos based on the cable length.
1475 All of this is magic and undocumented.
1476 */
1477 switch (tp->twistie) {
1478 case 1:
1479 if (RTL_R16 (CSCR) & CSCR_LinkOKBit) {
1480 /* We have link beat, let us tune the twister. */
1481 RTL_W16 (CSCR, CSCR_LinkDownOffCmd);
1482 tp->twistie = 2; /* Change to state 2. */
1483 next_tick = HZ / 10;
1484 } else {
1485 /* Just put in some reasonable defaults for when beat returns. */
1486 RTL_W16 (CSCR, CSCR_LinkDownCmd);
1487 RTL_W32 (FIFOTMS, 0x20); /* Turn on cable test mode. */
1488 RTL_W32 (PARA78, PARA78_default);
1489 RTL_W32 (PARA7c, PARA7c_default);
1490 tp->twistie = 0; /* Bail from future actions. */
1491 }
1492 break;
1493 case 2:
1494 /* Read how long it took to hear the echo. */
1495 linkcase = RTL_R16 (CSCR) & CSCR_LinkStatusBits;
1496 if (linkcase == 0x7000)
1497 tp->twist_row = 3;
1498 else if (linkcase == 0x3000)
1499 tp->twist_row = 2;
1500 else if (linkcase == 0x1000)
1501 tp->twist_row = 1;
1502 else
1503 tp->twist_row = 0;
1504 tp->twist_col = 0;
1505 tp->twistie = 3; /* Change to state 2. */
1506 next_tick = HZ / 10;
1507 break;
1508 case 3:
1509 /* Put out four tuning parameters, one per 100msec. */
1510 if (tp->twist_col == 0)
1511 RTL_W16 (FIFOTMS, 0);
1512 RTL_W32 (PARA7c, param[(int) tp->twist_row]
1513 [(int) tp->twist_col]);
1514 next_tick = HZ / 10;
1515 if (++tp->twist_col >= 4) {
1516 /* For short cables we are done.
1517 For long cables (row == 3) check for mistune. */
1518 tp->twistie =
1519 (tp->twist_row == 3) ? 4 : 0;
1520 }
1521 break;
1522 case 4:
1523 /* Special case for long cables: check for mistune. */
1524 if ((RTL_R16 (CSCR) &
1525 CSCR_LinkStatusBits) == 0x7000) {
1526 tp->twistie = 0;
1527 break;
1528 } else {
1529 RTL_W32 (PARA7c, 0xfb38de03);
1530 tp->twistie = 5;
1531 next_tick = HZ / 10;
1532 }
1533 break;
1534 case 5:
1535 /* Retune for shorter cable (column 2). */
1536 RTL_W32 (FIFOTMS, 0x20);
1537 RTL_W32 (PARA78, PARA78_default);
1538 RTL_W32 (PARA7c, PARA7c_default);
1539 RTL_W32 (FIFOTMS, 0x00);
1540 tp->twist_row = 2;
1541 tp->twist_col = 0;
1542 tp->twistie = 3;
1543 next_tick = HZ / 10;
1544 break;
1545
1546 default:
1547 /* do nothing */
1548 break;
1549 }
1550 }
1551 #endif /* CONFIG_8139TOO_TUNE_TWISTER */
1552
1553 static inline void rtl8139_thread_iter (struct net_device *dev,
1554 struct rtl8139_private *tp,
1555 void __iomem *ioaddr)
1556 {
1557 int mii_lpa;
1558
1559 mii_lpa = mdio_read (dev, tp->phys[0], MII_LPA);
1560
1561 if (!tp->mii.force_media && mii_lpa != 0xffff) {
1562 int duplex = (mii_lpa & LPA_100FULL)
1563 || (mii_lpa & 0x01C0) == 0x0040;
1564 if (tp->mii.full_duplex != duplex) {
1565 tp->mii.full_duplex = duplex;
1566
1567 if (mii_lpa) {
1568 printk (KERN_INFO
1569 "%s: Setting %s-duplex based on MII #%d link"
1570 " partner ability of %4.4x.\n",
1571 dev->name,
1572 tp->mii.full_duplex ? "full" : "half",
1573 tp->phys[0], mii_lpa);
1574 } else {
1575 printk(KERN_INFO"%s: media is unconnected, link down, or incompatible connection\n",
1576 dev->name);
1577 }
1578 #if 0
1579 RTL_W8 (Cfg9346, Cfg9346_Unlock);
1580 RTL_W8 (Config1, tp->mii.full_duplex ? 0x60 : 0x20);
1581 RTL_W8 (Cfg9346, Cfg9346_Lock);
1582 #endif
1583 }
1584 }
1585
1586 next_tick = HZ * 60;
1587
1588 rtl8139_tune_twister (dev, tp);
1589
1590 DPRINTK ("%s: Media selection tick, Link partner %4.4x.\n",
1591 dev->name, RTL_R16 (NWayLPAR));
1592 DPRINTK ("%s: Other registers are IntMask %4.4x IntStatus %4.4x\n",
1593 dev->name, RTL_R16 (IntrMask), RTL_R16 (IntrStatus));
1594 DPRINTK ("%s: Chip config %2.2x %2.2x.\n",
1595 dev->name, RTL_R8 (Config0),
1596 RTL_R8 (Config1));
1597 }
1598
1599 static void rtl8139_thread (struct work_struct *work)
1600 {
1601 struct rtl8139_private *tp =
1602 container_of(work, struct rtl8139_private, thread.work);
1603 struct net_device *dev = tp->mii.dev;
1604 unsigned long thr_delay = next_tick;
1605
1606 if (tp->watchdog_fired) {
1607 tp->watchdog_fired = 0;
1608 rtl8139_tx_timeout_task(work);
1609 } else if (rtnl_trylock()) {
1610 rtl8139_thread_iter (dev, tp, tp->mmio_addr);
1611 rtnl_unlock ();
1612 } else {
1613 /* unlikely race. mitigate with fast poll. */
1614 thr_delay = HZ / 2;
1615 }
1616
1617 schedule_delayed_work(&tp->thread, thr_delay);
1618 }
1619
1620 static void rtl8139_start_thread(struct rtl8139_private *tp)
1621 {
1622 tp->twistie = 0;
1623 if (tp->chipset == CH_8139_K)
1624 tp->twistie = 1;
1625 else if (tp->drv_flags & HAS_LNK_CHNG)
1626 return;
1627
1628 tp->have_thread = 1;
1629
1630 schedule_delayed_work(&tp->thread, next_tick);
1631 }
1632
1633 static void rtl8139_stop_thread(struct rtl8139_private *tp)
1634 {
1635 if (tp->have_thread) {
1636 cancel_rearming_delayed_work(&tp->thread);
1637 tp->have_thread = 0;
1638 } else
1639 flush_scheduled_work();
1640 }
1641
1642 static inline void rtl8139_tx_clear (struct rtl8139_private *tp)
1643 {
1644 tp->cur_tx = 0;
1645 tp->dirty_tx = 0;
1646
1647 /* XXX account for unsent Tx packets in tp->stats.tx_dropped */
1648 }
1649
1650 static void rtl8139_tx_timeout_task (struct work_struct *work)
1651 {
1652 struct rtl8139_private *tp =
1653 container_of(work, struct rtl8139_private, thread.work);
1654 struct net_device *dev = tp->mii.dev;
1655 void __iomem *ioaddr = tp->mmio_addr;
1656 int i;
1657 u8 tmp8;
1658
1659 printk (KERN_DEBUG "%s: Transmit timeout, status %2.2x %4.4x %4.4x "
1660 "media %2.2x.\n", dev->name, RTL_R8 (ChipCmd),
1661 RTL_R16(IntrStatus), RTL_R16(IntrMask), RTL_R8(MediaStatus));
1662 /* Emit info to figure out what went wrong. */
1663 printk (KERN_DEBUG "%s: Tx queue start entry %ld dirty entry %ld.\n",
1664 dev->name, tp->cur_tx, tp->dirty_tx);
1665 for (i = 0; i < NUM_TX_DESC; i++)
1666 printk (KERN_DEBUG "%s: Tx descriptor %d is %8.8lx.%s\n",
1667 dev->name, i, RTL_R32 (TxStatus0 + (i * 4)),
1668 i == tp->dirty_tx % NUM_TX_DESC ?
1669 " (queue head)" : "");
1670
1671 tp->xstats.tx_timeouts++;
1672
1673 /* disable Tx ASAP, if not already */
1674 tmp8 = RTL_R8 (ChipCmd);
1675 if (tmp8 & CmdTxEnb)
1676 RTL_W8 (ChipCmd, CmdRxEnb);
1677
1678 spin_lock_bh(&tp->rx_lock);
1679 /* Disable interrupts by clearing the interrupt mask. */
1680 RTL_W16 (IntrMask, 0x0000);
1681
1682 /* Stop a shared interrupt from scavenging while we are. */
1683 spin_lock_irq(&tp->lock);
1684 rtl8139_tx_clear (tp);
1685 spin_unlock_irq(&tp->lock);
1686
1687 /* ...and finally, reset everything */
1688 if (netif_running(dev)) {
1689 rtl8139_hw_start (dev);
1690 netif_wake_queue (dev);
1691 }
1692 spin_unlock_bh(&tp->rx_lock);
1693 }
1694
1695 static void rtl8139_tx_timeout (struct net_device *dev)
1696 {
1697 struct rtl8139_private *tp = netdev_priv(dev);
1698
1699 if (!tp->have_thread) {
1700 INIT_DELAYED_WORK(&tp->thread, rtl8139_tx_timeout_task);
1701 schedule_delayed_work(&tp->thread, next_tick);
1702 } else
1703 tp->watchdog_fired = 1;
1704
1705 }
1706
1707 static int rtl8139_start_xmit (struct sk_buff *skb, struct net_device *dev)
1708 {
1709 struct rtl8139_private *tp = netdev_priv(dev);
1710 void __iomem *ioaddr = tp->mmio_addr;
1711 unsigned int entry;
1712 unsigned int len = skb->len;
1713 unsigned long flags;
1714
1715 /* Calculate the next Tx descriptor entry. */
1716 entry = tp->cur_tx % NUM_TX_DESC;
1717
1718 /* Note: the chip doesn't have auto-pad! */
1719 if (likely(len < TX_BUF_SIZE)) {
1720 if (len < ETH_ZLEN)
1721 memset(tp->tx_buf[entry], 0, ETH_ZLEN);
1722 skb_copy_and_csum_dev(skb, tp->tx_buf[entry]);
1723 dev_kfree_skb(skb);
1724 } else {
1725 dev_kfree_skb(skb);
1726 tp->stats.tx_dropped++;
1727 return 0;
1728 }
1729
1730 spin_lock_irqsave(&tp->lock, flags);
1731 RTL_W32_F (TxStatus0 + (entry * sizeof (u32)),
1732 tp->tx_flag | max(len, (unsigned int)ETH_ZLEN));
1733
1734 dev->trans_start = jiffies;
1735
1736 tp->cur_tx++;
1737 wmb();
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 if (netif_msg_tx_queued(tp))
1744 printk (KERN_DEBUG "%s: Queued Tx packet size %u to slot %d.\n",
1745 dev->name, len, entry);
1746
1747 return 0;
1748 }
1749
1750
1751 static void rtl8139_tx_interrupt (struct net_device *dev,
1752 struct rtl8139_private *tp,
1753 void __iomem *ioaddr)
1754 {
1755 unsigned long dirty_tx, tx_left;
1756
1757 assert (dev != NULL);
1758 assert (ioaddr != NULL);
1759
1760 dirty_tx = tp->dirty_tx;
1761 tx_left = tp->cur_tx - dirty_tx;
1762 while (tx_left > 0) {
1763 int entry = dirty_tx % NUM_TX_DESC;
1764 int txstatus;
1765
1766 txstatus = RTL_R32 (TxStatus0 + (entry * sizeof (u32)));
1767
1768 if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
1769 break; /* It still hasn't been Txed */
1770
1771 /* Note: TxCarrierLost is always asserted at 100mbps. */
1772 if (txstatus & (TxOutOfWindow | TxAborted)) {
1773 /* There was an major error, log it. */
1774 if (netif_msg_tx_err(tp))
1775 printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
1776 dev->name, txstatus);
1777 tp->stats.tx_errors++;
1778 if (txstatus & TxAborted) {
1779 tp->stats.tx_aborted_errors++;
1780 RTL_W32 (TxConfig, TxClearAbt);
1781 RTL_W16 (IntrStatus, TxErr);
1782 wmb();
1783 }
1784 if (txstatus & TxCarrierLost)
1785 tp->stats.tx_carrier_errors++;
1786 if (txstatus & TxOutOfWindow)
1787 tp->stats.tx_window_errors++;
1788 } else {
1789 if (txstatus & TxUnderrun) {
1790 /* Add 64 to the Tx FIFO threshold. */
1791 if (tp->tx_flag < 0x00300000)
1792 tp->tx_flag += 0x00020000;
1793 tp->stats.tx_fifo_errors++;
1794 }
1795 tp->stats.collisions += (txstatus >> 24) & 15;
1796 tp->stats.tx_bytes += txstatus & 0x7ff;
1797 tp->stats.tx_packets++;
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 printk (KERN_ERR "%s: Out-of-sync dirty pointer, %ld vs. %ld.\n",
1807 dev->name, 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 if (netif_msg_rx_err (tp))
1831 printk(KERN_DEBUG "%s: Ethernet frame had errors, status %8.8x.\n",
1832 dev->name, rx_status);
1833 tp->stats.rx_errors++;
1834 if (!(rx_status & RxStatusOK)) {
1835 if (rx_status & RxTooLong) {
1836 DPRINTK ("%s: Oversized Ethernet frame, status %4.4x!\n",
1837 dev->name, rx_status);
1838 /* A.C.: The chip hangs here. */
1839 }
1840 if (rx_status & (RxBadSymbol | RxBadAlign))
1841 tp->stats.rx_frame_errors++;
1842 if (rx_status & (RxRunt | RxTooLong))
1843 tp->stats.rx_length_errors++;
1844 if (rx_status & RxCRCErr)
1845 tp->stats.rx_crc_errors++;
1846 } else {
1847 tp->xstats.rx_lost_in_ring++;
1848 }
1849
1850 #ifndef CONFIG_8139_OLD_RX_RESET
1851 tmp8 = RTL_R8 (ChipCmd);
1852 RTL_W8 (ChipCmd, tmp8 & ~CmdRxEnb);
1853 RTL_W8 (ChipCmd, tmp8);
1854 RTL_W32 (RxConfig, tp->rx_config);
1855 tp->cur_rx = 0;
1856 #else
1857 /* Reset the receiver, based on RealTek recommendation. (Bug?) */
1858
1859 /* disable receive */
1860 RTL_W8_F (ChipCmd, CmdTxEnb);
1861 tmp_work = 200;
1862 while (--tmp_work > 0) {
1863 udelay(1);
1864 tmp8 = RTL_R8 (ChipCmd);
1865 if (!(tmp8 & CmdRxEnb))
1866 break;
1867 }
1868 if (tmp_work <= 0)
1869 printk (KERN_WARNING PFX "rx stop wait too long\n");
1870 /* restart receive */
1871 tmp_work = 200;
1872 while (--tmp_work > 0) {
1873 RTL_W8_F (ChipCmd, CmdRxEnb | CmdTxEnb);
1874 udelay(1);
1875 tmp8 = RTL_R8 (ChipCmd);
1876 if ((tmp8 & CmdRxEnb) && (tmp8 & CmdTxEnb))
1877 break;
1878 }
1879 if (tmp_work <= 0)
1880 printk (KERN_WARNING PFX "tx/rx enable wait too long\n");
1881
1882 /* and reinitialize all rx related registers */
1883 RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1884 /* Must enable Tx/Rx before setting transfer thresholds! */
1885 RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1886
1887 tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1888 RTL_W32 (RxConfig, tp->rx_config);
1889 tp->cur_rx = 0;
1890
1891 DPRINTK("init buffer addresses\n");
1892
1893 /* Lock Config[01234] and BMCR register writes */
1894 RTL_W8 (Cfg9346, Cfg9346_Lock);
1895
1896 /* init Rx ring buffer DMA address */
1897 RTL_W32_F (RxBuf, tp->rx_ring_dma);
1898
1899 /* A.C.: Reset the multicast list. */
1900 __set_rx_mode (dev);
1901 #endif
1902 }
1903
1904 #if RX_BUF_IDX == 3
1905 static __inline__ void wrap_copy(struct sk_buff *skb, const unsigned char *ring,
1906 u32 offset, unsigned int size)
1907 {
1908 u32 left = RX_BUF_LEN - offset;
1909
1910 if (size > left) {
1911 memcpy(skb->data, ring + offset, left);
1912 memcpy(skb->data+left, ring, size - left);
1913 } else
1914 memcpy(skb->data, ring + offset, size);
1915 }
1916 #endif
1917
1918 static void rtl8139_isr_ack(struct rtl8139_private *tp)
1919 {
1920 void __iomem *ioaddr = tp->mmio_addr;
1921 u16 status;
1922
1923 status = RTL_R16 (IntrStatus) & RxAckBits;
1924
1925 /* Clear out errors and receive interrupts */
1926 if (likely(status != 0)) {
1927 if (unlikely(status & (RxFIFOOver | RxOverflow))) {
1928 tp->stats.rx_errors++;
1929 if (status & RxFIFOOver)
1930 tp->stats.rx_fifo_errors++;
1931 }
1932 RTL_W16_F (IntrStatus, RxAckBits);
1933 }
1934 }
1935
1936 static int rtl8139_rx(struct net_device *dev, struct rtl8139_private *tp,
1937 int budget)
1938 {
1939 void __iomem *ioaddr = tp->mmio_addr;
1940 int received = 0;
1941 unsigned char *rx_ring = tp->rx_ring;
1942 unsigned int cur_rx = tp->cur_rx;
1943 unsigned int rx_size = 0;
1944
1945 DPRINTK ("%s: In rtl8139_rx(), current %4.4x BufAddr %4.4x,"
1946 " free to %4.4x, Cmd %2.2x.\n", dev->name, (u16)cur_rx,
1947 RTL_R16 (RxBufAddr),
1948 RTL_R16 (RxBufPtr), RTL_R8 (ChipCmd));
1949
1950 while (netif_running(dev) && received < budget
1951 && (RTL_R8 (ChipCmd) & RxBufEmpty) == 0) {
1952 u32 ring_offset = cur_rx % RX_BUF_LEN;
1953 u32 rx_status;
1954 unsigned int pkt_size;
1955 struct sk_buff *skb;
1956
1957 rmb();
1958
1959 /* read size+status of next frame from DMA ring buffer */
1960 rx_status = le32_to_cpu (*(u32 *) (rx_ring + ring_offset));
1961 rx_size = rx_status >> 16;
1962 pkt_size = rx_size - 4;
1963
1964 if (netif_msg_rx_status(tp))
1965 printk(KERN_DEBUG "%s: rtl8139_rx() status %4.4x, size %4.4x,"
1966 " cur %4.4x.\n", dev->name, rx_status,
1967 rx_size, cur_rx);
1968 #if RTL8139_DEBUG > 2
1969 {
1970 int i;
1971 DPRINTK ("%s: Frame contents ", dev->name);
1972 for (i = 0; i < 70; i++)
1973 printk (" %2.2x",
1974 rx_ring[ring_offset + i]);
1975 printk (".\n");
1976 }
1977 #endif
1978
1979 /* Packet copy from FIFO still in progress.
1980 * Theoretically, this should never happen
1981 * since EarlyRx is disabled.
1982 */
1983 if (unlikely(rx_size == 0xfff0)) {
1984 if (!tp->fifo_copy_timeout)
1985 tp->fifo_copy_timeout = jiffies + 2;
1986 else if (time_after(jiffies, tp->fifo_copy_timeout)) {
1987 DPRINTK ("%s: hung FIFO. Reset.", dev->name);
1988 rx_size = 0;
1989 goto no_early_rx;
1990 }
1991 if (netif_msg_intr(tp)) {
1992 printk(KERN_DEBUG "%s: fifo copy in progress.",
1993 dev->name);
1994 }
1995 tp->xstats.early_rx++;
1996 break;
1997 }
1998
1999 no_early_rx:
2000 tp->fifo_copy_timeout = 0;
2001
2002 /* If Rx err or invalid rx_size/rx_status received
2003 * (which happens if we get lost in the ring),
2004 * Rx process gets reset, so we abort any further
2005 * Rx processing.
2006 */
2007 if (unlikely((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
2008 (rx_size < 8) ||
2009 (!(rx_status & RxStatusOK)))) {
2010 rtl8139_rx_err (rx_status, dev, tp, ioaddr);
2011 received = -1;
2012 goto out;
2013 }
2014
2015 /* Malloc up new buffer, compatible with net-2e. */
2016 /* Omit the four octet CRC from the length. */
2017
2018 skb = dev_alloc_skb (pkt_size + 2);
2019 if (likely(skb)) {
2020 skb->dev = dev;
2021 skb_reserve (skb, 2); /* 16 byte align the IP fields. */
2022 #if RX_BUF_IDX == 3
2023 wrap_copy(skb, rx_ring, ring_offset+4, pkt_size);
2024 #else
2025 eth_copy_and_sum (skb, &rx_ring[ring_offset + 4], pkt_size, 0);
2026 #endif
2027 skb_put (skb, pkt_size);
2028
2029 skb->protocol = eth_type_trans (skb, dev);
2030
2031 dev->last_rx = jiffies;
2032 tp->stats.rx_bytes += pkt_size;
2033 tp->stats.rx_packets++;
2034
2035 netif_receive_skb (skb);
2036 } else {
2037 if (net_ratelimit())
2038 printk (KERN_WARNING
2039 "%s: Memory squeeze, dropping packet.\n",
2040 dev->name);
2041 tp->stats.rx_dropped++;
2042 }
2043 received++;
2044
2045 cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
2046 RTL_W16 (RxBufPtr, (u16) (cur_rx - 16));
2047
2048 rtl8139_isr_ack(tp);
2049 }
2050
2051 if (unlikely(!received || rx_size == 0xfff0))
2052 rtl8139_isr_ack(tp);
2053
2054 #if RTL8139_DEBUG > 1
2055 DPRINTK ("%s: Done rtl8139_rx(), current %4.4x BufAddr %4.4x,"
2056 " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx,
2057 RTL_R16 (RxBufAddr),
2058 RTL_R16 (RxBufPtr), RTL_R8 (ChipCmd));
2059 #endif
2060
2061 tp->cur_rx = cur_rx;
2062
2063 /*
2064 * The receive buffer should be mostly empty.
2065 * Tell NAPI to reenable the Rx irq.
2066 */
2067 if (tp->fifo_copy_timeout)
2068 received = budget;
2069
2070 out:
2071 return received;
2072 }
2073
2074
2075 static void rtl8139_weird_interrupt (struct net_device *dev,
2076 struct rtl8139_private *tp,
2077 void __iomem *ioaddr,
2078 int status, int link_changed)
2079 {
2080 DPRINTK ("%s: Abnormal interrupt, status %8.8x.\n",
2081 dev->name, status);
2082
2083 assert (dev != NULL);
2084 assert (tp != NULL);
2085 assert (ioaddr != NULL);
2086
2087 /* Update the error count. */
2088 tp->stats.rx_missed_errors += RTL_R32 (RxMissed);
2089 RTL_W32 (RxMissed, 0);
2090
2091 if ((status & RxUnderrun) && link_changed &&
2092 (tp->drv_flags & HAS_LNK_CHNG)) {
2093 rtl_check_media(dev, 0);
2094 status &= ~RxUnderrun;
2095 }
2096
2097 if (status & (RxUnderrun | RxErr))
2098 tp->stats.rx_errors++;
2099
2100 if (status & PCSTimeout)
2101 tp->stats.rx_length_errors++;
2102 if (status & RxUnderrun)
2103 tp->stats.rx_fifo_errors++;
2104 if (status & PCIErr) {
2105 u16 pci_cmd_status;
2106 pci_read_config_word (tp->pci_dev, PCI_STATUS, &pci_cmd_status);
2107 pci_write_config_word (tp->pci_dev, PCI_STATUS, pci_cmd_status);
2108
2109 printk (KERN_ERR "%s: PCI Bus error %4.4x.\n",
2110 dev->name, pci_cmd_status);
2111 }
2112 }
2113
2114 static int rtl8139_poll(struct net_device *dev, int *budget)
2115 {
2116 struct rtl8139_private *tp = netdev_priv(dev);
2117 void __iomem *ioaddr = tp->mmio_addr;
2118 int orig_budget = min(*budget, dev->quota);
2119 int done = 1;
2120
2121 spin_lock(&tp->rx_lock);
2122 if (likely(RTL_R16(IntrStatus) & RxAckBits)) {
2123 int work_done;
2124
2125 work_done = rtl8139_rx(dev, tp, orig_budget);
2126 if (likely(work_done > 0)) {
2127 *budget -= work_done;
2128 dev->quota -= work_done;
2129 done = (work_done < orig_budget);
2130 }
2131 }
2132
2133 if (done) {
2134 unsigned long flags;
2135 /*
2136 * Order is important since data can get interrupted
2137 * again when we think we are done.
2138 */
2139 local_irq_save(flags);
2140 RTL_W16_F(IntrMask, rtl8139_intr_mask);
2141 __netif_rx_complete(dev);
2142 local_irq_restore(flags);
2143 }
2144 spin_unlock(&tp->rx_lock);
2145
2146 return !done;
2147 }
2148
2149 /* The interrupt handler does all of the Rx thread work and cleans up
2150 after the Tx thread. */
2151 static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance)
2152 {
2153 struct net_device *dev = (struct net_device *) dev_instance;
2154 struct rtl8139_private *tp = netdev_priv(dev);
2155 void __iomem *ioaddr = tp->mmio_addr;
2156 u16 status, ackstat;
2157 int link_changed = 0; /* avoid bogus "uninit" warning */
2158 int handled = 0;
2159
2160 spin_lock (&tp->lock);
2161 status = RTL_R16 (IntrStatus);
2162
2163 /* shared irq? */
2164 if (unlikely((status & rtl8139_intr_mask) == 0))
2165 goto out;
2166
2167 handled = 1;
2168
2169 /* h/w no longer present (hotplug?) or major error, bail */
2170 if (unlikely(status == 0xFFFF))
2171 goto out;
2172
2173 /* close possible race's with dev_close */
2174 if (unlikely(!netif_running(dev))) {
2175 RTL_W16 (IntrMask, 0);
2176 goto out;
2177 }
2178
2179 /* Acknowledge all of the current interrupt sources ASAP, but
2180 an first get an additional status bit from CSCR. */
2181 if (unlikely(status & RxUnderrun))
2182 link_changed = RTL_R16 (CSCR) & CSCR_LinkChangeBit;
2183
2184 ackstat = status & ~(RxAckBits | TxErr);
2185 if (ackstat)
2186 RTL_W16 (IntrStatus, ackstat);
2187
2188 /* Receive packets are processed by poll routine.
2189 If not running start it now. */
2190 if (status & RxAckBits){
2191 if (netif_rx_schedule_prep(dev)) {
2192 RTL_W16_F (IntrMask, rtl8139_norx_intr_mask);
2193 __netif_rx_schedule (dev);
2194 }
2195 }
2196
2197 /* Check uncommon events with one test. */
2198 if (unlikely(status & (PCIErr | PCSTimeout | RxUnderrun | RxErr)))
2199 rtl8139_weird_interrupt (dev, tp, ioaddr,
2200 status, link_changed);
2201
2202 if (status & (TxOK | TxErr)) {
2203 rtl8139_tx_interrupt (dev, tp, ioaddr);
2204 if (status & TxErr)
2205 RTL_W16 (IntrStatus, TxErr);
2206 }
2207 out:
2208 spin_unlock (&tp->lock);
2209
2210 DPRINTK ("%s: exiting interrupt, intr_status=%#4.4x.\n",
2211 dev->name, RTL_R16 (IntrStatus));
2212 return IRQ_RETVAL(handled);
2213 }
2214
2215 #ifdef CONFIG_NET_POLL_CONTROLLER
2216 /*
2217 * Polling receive - used by netconsole and other diagnostic tools
2218 * to allow network i/o with interrupts disabled.
2219 */
2220 static void rtl8139_poll_controller(struct net_device *dev)
2221 {
2222 disable_irq(dev->irq);
2223 rtl8139_interrupt(dev->irq, dev);
2224 enable_irq(dev->irq);
2225 }
2226 #endif
2227
2228 static int rtl8139_close (struct net_device *dev)
2229 {
2230 struct rtl8139_private *tp = netdev_priv(dev);
2231 void __iomem *ioaddr = tp->mmio_addr;
2232 unsigned long flags;
2233
2234 netif_stop_queue (dev);
2235
2236 rtl8139_stop_thread(tp);
2237
2238 if (netif_msg_ifdown(tp))
2239 printk(KERN_DEBUG "%s: Shutting down ethercard, status was 0x%4.4x.\n",
2240 dev->name, RTL_R16 (IntrStatus));
2241
2242 spin_lock_irqsave (&tp->lock, flags);
2243
2244 /* Stop the chip's Tx and Rx DMA processes. */
2245 RTL_W8 (ChipCmd, 0);
2246
2247 /* Disable interrupts by clearing the interrupt mask. */
2248 RTL_W16 (IntrMask, 0);
2249
2250 /* Update the error counts. */
2251 tp->stats.rx_missed_errors += RTL_R32 (RxMissed);
2252 RTL_W32 (RxMissed, 0);
2253
2254 spin_unlock_irqrestore (&tp->lock, flags);
2255
2256 synchronize_irq (dev->irq); /* racy, but that's ok here */
2257 free_irq (dev->irq, dev);
2258
2259 rtl8139_tx_clear (tp);
2260
2261 pci_free_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
2262 tp->rx_ring, tp->rx_ring_dma);
2263 pci_free_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
2264 tp->tx_bufs, tp->tx_bufs_dma);
2265 tp->rx_ring = NULL;
2266 tp->tx_bufs = NULL;
2267
2268 /* Green! Put the chip in low-power mode. */
2269 RTL_W8 (Cfg9346, Cfg9346_Unlock);
2270
2271 if (rtl_chip_info[tp->chipset].flags & HasHltClk)
2272 RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
2273
2274 return 0;
2275 }
2276
2277
2278 /* Get the ethtool Wake-on-LAN settings. Assumes that wol points to
2279 kernel memory, *wol has been initialized as {ETHTOOL_GWOL}, and
2280 other threads or interrupts aren't messing with the 8139. */
2281 static void rtl8139_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2282 {
2283 struct rtl8139_private *np = netdev_priv(dev);
2284 void __iomem *ioaddr = np->mmio_addr;
2285
2286 spin_lock_irq(&np->lock);
2287 if (rtl_chip_info[np->chipset].flags & HasLWake) {
2288 u8 cfg3 = RTL_R8 (Config3);
2289 u8 cfg5 = RTL_R8 (Config5);
2290
2291 wol->supported = WAKE_PHY | WAKE_MAGIC
2292 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
2293
2294 wol->wolopts = 0;
2295 if (cfg3 & Cfg3_LinkUp)
2296 wol->wolopts |= WAKE_PHY;
2297 if (cfg3 & Cfg3_Magic)
2298 wol->wolopts |= WAKE_MAGIC;
2299 /* (KON)FIXME: See how netdev_set_wol() handles the
2300 following constants. */
2301 if (cfg5 & Cfg5_UWF)
2302 wol->wolopts |= WAKE_UCAST;
2303 if (cfg5 & Cfg5_MWF)
2304 wol->wolopts |= WAKE_MCAST;
2305 if (cfg5 & Cfg5_BWF)
2306 wol->wolopts |= WAKE_BCAST;
2307 }
2308 spin_unlock_irq(&np->lock);
2309 }
2310
2311
2312 /* Set the ethtool Wake-on-LAN settings. Return 0 or -errno. Assumes
2313 that wol points to kernel memory and other threads or interrupts
2314 aren't messing with the 8139. */
2315 static int rtl8139_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2316 {
2317 struct rtl8139_private *np = netdev_priv(dev);
2318 void __iomem *ioaddr = np->mmio_addr;
2319 u32 support;
2320 u8 cfg3, cfg5;
2321
2322 support = ((rtl_chip_info[np->chipset].flags & HasLWake)
2323 ? (WAKE_PHY | WAKE_MAGIC
2324 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST)
2325 : 0);
2326 if (wol->wolopts & ~support)
2327 return -EINVAL;
2328
2329 spin_lock_irq(&np->lock);
2330 cfg3 = RTL_R8 (Config3) & ~(Cfg3_LinkUp | Cfg3_Magic);
2331 if (wol->wolopts & WAKE_PHY)
2332 cfg3 |= Cfg3_LinkUp;
2333 if (wol->wolopts & WAKE_MAGIC)
2334 cfg3 |= Cfg3_Magic;
2335 RTL_W8 (Cfg9346, Cfg9346_Unlock);
2336 RTL_W8 (Config3, cfg3);
2337 RTL_W8 (Cfg9346, Cfg9346_Lock);
2338
2339 cfg5 = RTL_R8 (Config5) & ~(Cfg5_UWF | Cfg5_MWF | Cfg5_BWF);
2340 /* (KON)FIXME: These are untested. We may have to set the
2341 CRC0, Wakeup0 and LSBCRC0 registers too, but I have no
2342 documentation. */
2343 if (wol->wolopts & WAKE_UCAST)
2344 cfg5 |= Cfg5_UWF;
2345 if (wol->wolopts & WAKE_MCAST)
2346 cfg5 |= Cfg5_MWF;
2347 if (wol->wolopts & WAKE_BCAST)
2348 cfg5 |= Cfg5_BWF;
2349 RTL_W8 (Config5, cfg5); /* need not unlock via Cfg9346 */
2350 spin_unlock_irq(&np->lock);
2351
2352 return 0;
2353 }
2354
2355 static void rtl8139_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2356 {
2357 struct rtl8139_private *np = netdev_priv(dev);
2358 strcpy(info->driver, DRV_NAME);
2359 strcpy(info->version, DRV_VERSION);
2360 strcpy(info->bus_info, pci_name(np->pci_dev));
2361 info->regdump_len = np->regs_len;
2362 }
2363
2364 static int rtl8139_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2365 {
2366 struct rtl8139_private *np = netdev_priv(dev);
2367 spin_lock_irq(&np->lock);
2368 mii_ethtool_gset(&np->mii, cmd);
2369 spin_unlock_irq(&np->lock);
2370 return 0;
2371 }
2372
2373 static int rtl8139_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2374 {
2375 struct rtl8139_private *np = netdev_priv(dev);
2376 int rc;
2377 spin_lock_irq(&np->lock);
2378 rc = mii_ethtool_sset(&np->mii, cmd);
2379 spin_unlock_irq(&np->lock);
2380 return rc;
2381 }
2382
2383 static int rtl8139_nway_reset(struct net_device *dev)
2384 {
2385 struct rtl8139_private *np = netdev_priv(dev);
2386 return mii_nway_restart(&np->mii);
2387 }
2388
2389 static u32 rtl8139_get_link(struct net_device *dev)
2390 {
2391 struct rtl8139_private *np = netdev_priv(dev);
2392 return mii_link_ok(&np->mii);
2393 }
2394
2395 static u32 rtl8139_get_msglevel(struct net_device *dev)
2396 {
2397 struct rtl8139_private *np = netdev_priv(dev);
2398 return np->msg_enable;
2399 }
2400
2401 static void rtl8139_set_msglevel(struct net_device *dev, u32 datum)
2402 {
2403 struct rtl8139_private *np = netdev_priv(dev);
2404 np->msg_enable = datum;
2405 }
2406
2407 /* TODO: we are too slack to do reg dumping for pio, for now */
2408 #ifdef CONFIG_8139TOO_PIO
2409 #define rtl8139_get_regs_len NULL
2410 #define rtl8139_get_regs NULL
2411 #else
2412 static int rtl8139_get_regs_len(struct net_device *dev)
2413 {
2414 struct rtl8139_private *np = netdev_priv(dev);
2415 return np->regs_len;
2416 }
2417
2418 static void rtl8139_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
2419 {
2420 struct rtl8139_private *np = netdev_priv(dev);
2421
2422 regs->version = RTL_REGS_VER;
2423
2424 spin_lock_irq(&np->lock);
2425 memcpy_fromio(regbuf, np->mmio_addr, regs->len);
2426 spin_unlock_irq(&np->lock);
2427 }
2428 #endif /* CONFIG_8139TOO_MMIO */
2429
2430 static int rtl8139_get_stats_count(struct net_device *dev)
2431 {
2432 return RTL_NUM_STATS;
2433 }
2434
2435 static void rtl8139_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2436 {
2437 struct rtl8139_private *np = netdev_priv(dev);
2438
2439 data[0] = np->xstats.early_rx;
2440 data[1] = np->xstats.tx_buf_mapped;
2441 data[2] = np->xstats.tx_timeouts;
2442 data[3] = np->xstats.rx_lost_in_ring;
2443 }
2444
2445 static void rtl8139_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2446 {
2447 memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2448 }
2449
2450 static const struct ethtool_ops rtl8139_ethtool_ops = {
2451 .get_drvinfo = rtl8139_get_drvinfo,
2452 .get_settings = rtl8139_get_settings,
2453 .set_settings = rtl8139_set_settings,
2454 .get_regs_len = rtl8139_get_regs_len,
2455 .get_regs = rtl8139_get_regs,
2456 .nway_reset = rtl8139_nway_reset,
2457 .get_link = rtl8139_get_link,
2458 .get_msglevel = rtl8139_get_msglevel,
2459 .set_msglevel = rtl8139_set_msglevel,
2460 .get_wol = rtl8139_get_wol,
2461 .set_wol = rtl8139_set_wol,
2462 .get_strings = rtl8139_get_strings,
2463 .get_stats_count = rtl8139_get_stats_count,
2464 .get_ethtool_stats = rtl8139_get_ethtool_stats,
2465 .get_perm_addr = ethtool_op_get_perm_addr,
2466 };
2467
2468 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2469 {
2470 struct rtl8139_private *np = netdev_priv(dev);
2471 int rc;
2472
2473 if (!netif_running(dev))
2474 return -EINVAL;
2475
2476 spin_lock_irq(&np->lock);
2477 rc = generic_mii_ioctl(&np->mii, if_mii(rq), cmd, NULL);
2478 spin_unlock_irq(&np->lock);
2479
2480 return rc;
2481 }
2482
2483
2484 static struct net_device_stats *rtl8139_get_stats (struct net_device *dev)
2485 {
2486 struct rtl8139_private *tp = netdev_priv(dev);
2487 void __iomem *ioaddr = tp->mmio_addr;
2488 unsigned long flags;
2489
2490 if (netif_running(dev)) {
2491 spin_lock_irqsave (&tp->lock, flags);
2492 tp->stats.rx_missed_errors += RTL_R32 (RxMissed);
2493 RTL_W32 (RxMissed, 0);
2494 spin_unlock_irqrestore (&tp->lock, flags);
2495 }
2496
2497 return &tp->stats;
2498 }
2499
2500 /* Set or clear the multicast filter for this adaptor.
2501 This routine is not state sensitive and need not be SMP locked. */
2502
2503 static void __set_rx_mode (struct net_device *dev)
2504 {
2505 struct rtl8139_private *tp = netdev_priv(dev);
2506 void __iomem *ioaddr = tp->mmio_addr;
2507 u32 mc_filter[2]; /* Multicast hash filter */
2508 int i, rx_mode;
2509 u32 tmp;
2510
2511 DPRINTK ("%s: rtl8139_set_rx_mode(%4.4x) done -- Rx config %8.8lx.\n",
2512 dev->name, dev->flags, RTL_R32 (RxConfig));
2513
2514 /* Note: do not reorder, GCC is clever about common statements. */
2515 if (dev->flags & IFF_PROMISC) {
2516 rx_mode =
2517 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
2518 AcceptAllPhys;
2519 mc_filter[1] = mc_filter[0] = 0xffffffff;
2520 } else if ((dev->mc_count > multicast_filter_limit)
2521 || (dev->flags & IFF_ALLMULTI)) {
2522 /* Too many to filter perfectly -- accept all multicasts. */
2523 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
2524 mc_filter[1] = mc_filter[0] = 0xffffffff;
2525 } else {
2526 struct dev_mc_list *mclist;
2527 rx_mode = AcceptBroadcast | AcceptMyPhys;
2528 mc_filter[1] = mc_filter[0] = 0;
2529 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
2530 i++, mclist = mclist->next) {
2531 int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
2532
2533 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
2534 rx_mode |= AcceptMulticast;
2535 }
2536 }
2537
2538 /* We can safely update without stopping the chip. */
2539 tmp = rtl8139_rx_config | rx_mode;
2540 if (tp->rx_config != tmp) {
2541 RTL_W32_F (RxConfig, tmp);
2542 tp->rx_config = tmp;
2543 }
2544 RTL_W32_F (MAR0 + 0, mc_filter[0]);
2545 RTL_W32_F (MAR0 + 4, mc_filter[1]);
2546 }
2547
2548 static void rtl8139_set_rx_mode (struct net_device *dev)
2549 {
2550 unsigned long flags;
2551 struct rtl8139_private *tp = netdev_priv(dev);
2552
2553 spin_lock_irqsave (&tp->lock, flags);
2554 __set_rx_mode(dev);
2555 spin_unlock_irqrestore (&tp->lock, flags);
2556 }
2557
2558 #ifdef CONFIG_PM
2559
2560 static int rtl8139_suspend (struct pci_dev *pdev, pm_message_t state)
2561 {
2562 struct net_device *dev = pci_get_drvdata (pdev);
2563 struct rtl8139_private *tp = netdev_priv(dev);
2564 void __iomem *ioaddr = tp->mmio_addr;
2565 unsigned long flags;
2566
2567 pci_save_state (pdev);
2568
2569 if (!netif_running (dev))
2570 return 0;
2571
2572 netif_device_detach (dev);
2573
2574 spin_lock_irqsave (&tp->lock, flags);
2575
2576 /* Disable interrupts, stop Tx and Rx. */
2577 RTL_W16 (IntrMask, 0);
2578 RTL_W8 (ChipCmd, 0);
2579
2580 /* Update the error counts. */
2581 tp->stats.rx_missed_errors += RTL_R32 (RxMissed);
2582 RTL_W32 (RxMissed, 0);
2583
2584 spin_unlock_irqrestore (&tp->lock, flags);
2585
2586 pci_set_power_state (pdev, PCI_D3hot);
2587
2588 return 0;
2589 }
2590
2591
2592 static int rtl8139_resume (struct pci_dev *pdev)
2593 {
2594 struct net_device *dev = pci_get_drvdata (pdev);
2595
2596 pci_restore_state (pdev);
2597 if (!netif_running (dev))
2598 return 0;
2599 pci_set_power_state (pdev, PCI_D0);
2600 rtl8139_init_ring (dev);
2601 rtl8139_hw_start (dev);
2602 netif_device_attach (dev);
2603 return 0;
2604 }
2605
2606 #endif /* CONFIG_PM */
2607
2608
2609 static struct pci_driver rtl8139_pci_driver = {
2610 .name = DRV_NAME,
2611 .id_table = rtl8139_pci_tbl,
2612 .probe = rtl8139_init_one,
2613 .remove = __devexit_p(rtl8139_remove_one),
2614 #ifdef CONFIG_PM
2615 .suspend = rtl8139_suspend,
2616 .resume = rtl8139_resume,
2617 #endif /* CONFIG_PM */
2618 };
2619
2620
2621 static int __init rtl8139_init_module (void)
2622 {
2623 /* when we're a module, we always print a version message,
2624 * even if no 8139 board is found.
2625 */
2626 #ifdef MODULE
2627 printk (KERN_INFO RTL8139_DRIVER_NAME "\n");
2628 #endif
2629
2630 return pci_register_driver(&rtl8139_pci_driver);
2631 }
2632
2633
2634 static void __exit rtl8139_cleanup_module (void)
2635 {
2636 pci_unregister_driver (&rtl8139_pci_driver);
2637 }
2638
2639
2640 module_init(rtl8139_init_module);
2641 module_exit(rtl8139_cleanup_module);
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