1 /*
2 
3 	8139too.c: A RealTek RTL-8139 Fast Ethernet driver for Linux.
4 
5 	Maintained by Jeff Garzik <jgarzik@pobox.com>
6 	Copyright 2000-2002 Jeff Garzik
7 
8 	Much code comes from Donald Becker's rtl8139.c driver,
9 	versions 1.13 and older.  This driver was originally based
10 	on rtl8139.c version 1.07.  Header of rtl8139.c version 1.13:
11 
12 	-----<snip>-----
13 
14 		Written 1997-2001 by Donald Becker.
15 		This software may be used and distributed according to the
16 		terms of the GNU General Public License (GPL), incorporated
17 		herein by reference.  Drivers based on or derived from this
18 		code fall under the GPL and must retain the authorship,
19 		copyright and license notice.  This file is not a complete
20 		program and may only be used when the entire operating
21 		system is licensed under the GPL.
22 
23 		This driver is for boards based on the RTL8129 and RTL8139
24 		PCI ethernet chips.
25 
26 		The author may be reached as becker@scyld.com, or C/O Scyld
27 		Computing Corporation 410 Severn Ave., Suite 210 Annapolis
28 		MD 21403
29 
30 		Support and updates available at
31 		http://www.scyld.com/network/rtl8139.html
32 
33 		Twister-tuning table provided by Kinston
34 		<shangh@realtek.com.tw>.
35 
36 	-----<snip>-----
37 
38 	This software may be used and distributed according to the terms
39 	of the GNU General Public License, incorporated herein by reference.
40 
41 	Contributors:
42 
43 		Donald Becker - he wrote the original driver, kudos to him!
44 		(but please don't e-mail him for support, this isn't his driver)
45 
46 		Tigran Aivazian - bug fixes, skbuff free cleanup
47 
48 		Martin Mares - suggestions for PCI cleanup
49 
50 		David S. Miller - PCI DMA and softnet updates
51 
52 		Ernst Gill - fixes ported from BSD driver
53 
54 		Daniel Kobras - identified specific locations of
55 			posted MMIO write bugginess
56 
57 		Gerard Sharp - bug fix, testing and feedback
58 
59 		David Ford - Rx ring wrap fix
60 
61 		Dan DeMaggio - swapped RTL8139 cards with me, and allowed me
62 		to find and fix a crucial bug on older chipsets.
63 
64 		Donald Becker/Chris Butterworth/Marcus Westergren -
65 		Noticed various Rx packet size-related buglets.
66 
67 		Santiago Garcia Mantinan - testing and feedback
68 
69 		Jens David - 2.2.x kernel backports
70 
71 		Martin Dennett - incredibly helpful insight on undocumented
72 		features of the 8139 chips
73 
74 		Jean-Jacques Michel - bug fix
75 
76 		Tobias Ringström - Rx interrupt status checking suggestion
77 
78 		Andrew Morton - Clear blocked signals, avoid
79 		buffer overrun setting current->comm.
80 
81 		Kalle Olavi Niemitalo - Wake-on-LAN ioctls
82 
83 		Robert Kuebel - Save kernel thread from dying on any signal.
84 
85 	Submitting bug reports:
86 
87 		"rtl8139-diag -mmmaaavvveefN" output
88 		enable RTL8139_DEBUG below, and look at 'dmesg' or kernel log
89 
90 */
91 
92 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
93 
94 #define DRV_NAME	"8139too"
95 #define DRV_VERSION	"0.9.28"
96 
97 
98 #include <linux/module.h>
99 #include <linux/kernel.h>
100 #include <linux/compiler.h>
101 #include <linux/pci.h>
102 #include <linux/init.h>
103 #include <linux/interrupt.h>
104 #include <linux/netdevice.h>
105 #include <linux/etherdevice.h>
106 #include <linux/rtnetlink.h>
107 #include <linux/delay.h>
108 #include <linux/ethtool.h>
109 #include <linux/mii.h>
110 #include <linux/completion.h>
111 #include <linux/crc32.h>
112 #include <linux/io.h>
113 #include <linux/uaccess.h>
114 #include <linux/gfp.h>
115 #include <linux/if_vlan.h>
116 #include <asm/irq.h>
117 
118 #define RTL8139_DRIVER_NAME   DRV_NAME " Fast Ethernet driver " DRV_VERSION
119 
120 /* Default Message level */
121 #define RTL8139_DEF_MSG_ENABLE   (NETIF_MSG_DRV   | \
122                                  NETIF_MSG_PROBE  | \
123                                  NETIF_MSG_LINK)
124 
125 
126 /* define to 1, 2 or 3 to enable copious debugging info */
127 #define RTL8139_DEBUG 0
128 
129 /* define to 1 to disable lightweight runtime debugging checks */
130 #undef RTL8139_NDEBUG
131 
132 
133 #ifdef RTL8139_NDEBUG
134 #  define assert(expr) do {} while (0)
135 #else
136 #  define assert(expr) \
137         if (unlikely(!(expr))) {				\
138 		pr_err("Assertion failed! %s,%s,%s,line=%d\n",	\
139 		       #expr, __FILE__, __func__, __LINE__);	\
140         }
141 #endif
142 
143 
144 /* A few user-configurable values. */
145 /* media options */
146 #define MAX_UNITS 8
147 static int media[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
148 static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
149 
150 /* Whether to use MMIO or PIO. Default to MMIO. */
151 #ifdef CONFIG_8139TOO_PIO
152 static bool use_io = true;
153 #else
154 static bool use_io = false;
155 #endif
156 
157 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
158    The RTL chips use a 64 element hash table based on the Ethernet CRC.  */
159 static int multicast_filter_limit = 32;
160 
161 /* bitmapped message enable number */
162 static int debug = -1;
163 
164 /*
165  * Receive ring size
166  * Warning: 64K ring has hardware issues and may lock up.
167  */
168 #if defined(CONFIG_SH_DREAMCAST)
169 #define RX_BUF_IDX 0	/* 8K ring */
170 #else
171 #define RX_BUF_IDX	2	/* 32K ring */
172 #endif
173 #define RX_BUF_LEN	(8192 << RX_BUF_IDX)
174 #define RX_BUF_PAD	16
175 #define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
176 
177 #if RX_BUF_LEN == 65536
178 #define RX_BUF_TOT_LEN	RX_BUF_LEN
179 #else
180 #define RX_BUF_TOT_LEN	(RX_BUF_LEN + RX_BUF_PAD + RX_BUF_WRAP_PAD)
181 #endif
182 
183 /* Number of Tx descriptor registers. */
184 #define NUM_TX_DESC	4
185 
186 /* max supported ethernet frame size -- must be at least (dev->mtu+18+4).*/
187 #define MAX_ETH_FRAME_SIZE	1792
188 
189 /* max supported payload size */
190 #define MAX_ETH_DATA_SIZE (MAX_ETH_FRAME_SIZE - VLAN_ETH_HLEN - ETH_FCS_LEN)
191 
192 /* Size of the Tx bounce buffers -- must be at least (dev->mtu+18+4). */
193 #define TX_BUF_SIZE	MAX_ETH_FRAME_SIZE
194 #define TX_BUF_TOT_LEN	(TX_BUF_SIZE * NUM_TX_DESC)
195 
196 /* PCI Tuning Parameters
197    Threshold is bytes transferred to chip before transmission starts. */
198 #define TX_FIFO_THRESH 256	/* In bytes, rounded down to 32 byte units. */
199 
200 /* The following settings are log_2(bytes)-4:  0 == 16 bytes .. 6==1024, 7==end of packet. */
201 #define RX_FIFO_THRESH	7	/* Rx buffer level before first PCI xfer.  */
202 #define RX_DMA_BURST	7	/* Maximum PCI burst, '6' is 1024 */
203 #define TX_DMA_BURST	6	/* Maximum PCI burst, '6' is 1024 */
204 #define TX_RETRY	8	/* 0-15.  retries = 16 + (TX_RETRY * 16) */
205 
206 /* Operational parameters that usually are not changed. */
207 /* Time in jiffies before concluding the transmitter is hung. */
208 #define TX_TIMEOUT  (6*HZ)
209 
210 
211 enum {
212 	HAS_MII_XCVR = 0x010000,
213 	HAS_CHIP_XCVR = 0x020000,
214 	HAS_LNK_CHNG = 0x040000,
215 };
216 
217 #define RTL_NUM_STATS 4		/* number of ETHTOOL_GSTATS u64's */
218 #define RTL_REGS_VER 1		/* version of reg. data in ETHTOOL_GREGS */
219 #define RTL_MIN_IO_SIZE 0x80
220 #define RTL8139B_IO_SIZE 256
221 
222 #define RTL8129_CAPS	HAS_MII_XCVR
223 #define RTL8139_CAPS	(HAS_CHIP_XCVR|HAS_LNK_CHNG)
224 
225 typedef enum {
226 	RTL8139 = 0,
227 	RTL8129,
228 } board_t;
229 
230 
231 /* indexed by board_t, above */
232 static const struct {
233 	const char *name;
234 	u32 hw_flags;
235 } board_info[] = {
236 	{ "RealTek RTL8139", RTL8139_CAPS },
237 	{ "RealTek RTL8129", RTL8129_CAPS },
238 };
239 
240 
241 static const struct pci_device_id rtl8139_pci_tbl[] = {
242 	{0x10ec, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
243 	{0x10ec, 0x8138, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
244 	{0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
245 	{0x1500, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
246 	{0x4033, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
247 	{0x1186, 0x1300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
248 	{0x1186, 0x1340, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
249 	{0x13d1, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
250 	{0x1259, 0xa117, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
251 	{0x1259, 0xa11e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
252 	{0x14ea, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
253 	{0x14ea, 0xab07, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
254 	{0x11db, 0x1234, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
255 	{0x1432, 0x9130, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
256 	{0x02ac, 0x1012, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
257 	{0x018a, 0x0106, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
258 	{0x126c, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
259 	{0x1743, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
260 	{0x021b, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
261 	{0x16ec, 0xab06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
262 
263 #ifdef CONFIG_SH_SECUREEDGE5410
264 	/* Bogus 8139 silicon reports 8129 without external PROM :-( */
265 	{0x10ec, 0x8129, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
266 #endif
267 #ifdef CONFIG_8139TOO_8129
268 	{0x10ec, 0x8129, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8129 },
269 #endif
270 
271 	/* some crazy cards report invalid vendor ids like
272 	 * 0x0001 here.  The other ids are valid and constant,
273 	 * so we simply don't match on the main vendor id.
274 	 */
275 	{PCI_ANY_ID, 0x8139, 0x10ec, 0x8139, 0, 0, RTL8139 },
276 	{PCI_ANY_ID, 0x8139, 0x1186, 0x1300, 0, 0, RTL8139 },
277 	{PCI_ANY_ID, 0x8139, 0x13d1, 0xab06, 0, 0, RTL8139 },
278 
279 	{0,}
280 };
281 MODULE_DEVICE_TABLE (pci, rtl8139_pci_tbl);
282 
283 static struct {
284 	const char str[ETH_GSTRING_LEN];
285 } ethtool_stats_keys[] = {
286 	{ "early_rx" },
287 	{ "tx_buf_mapped" },
288 	{ "tx_timeouts" },
289 	{ "rx_lost_in_ring" },
290 };
291 
292 /* The rest of these values should never change. */
293 
294 /* Symbolic offsets to registers. */
295 enum RTL8139_registers {
296 	MAC0		= 0,	 /* Ethernet hardware address. */
297 	MAR0		= 8,	 /* Multicast filter. */
298 	TxStatus0	= 0x10,	 /* Transmit status (Four 32bit registers). */
299 	TxAddr0		= 0x20,	 /* Tx descriptors (also four 32bit). */
300 	RxBuf		= 0x30,
301 	ChipCmd		= 0x37,
302 	RxBufPtr	= 0x38,
303 	RxBufAddr	= 0x3A,
304 	IntrMask	= 0x3C,
305 	IntrStatus	= 0x3E,
306 	TxConfig	= 0x40,
307 	RxConfig	= 0x44,
308 	Timer		= 0x48,	 /* A general-purpose counter. */
309 	RxMissed	= 0x4C,  /* 24 bits valid, write clears. */
310 	Cfg9346		= 0x50,
311 	Config0		= 0x51,
312 	Config1		= 0x52,
313 	TimerInt	= 0x54,
314 	MediaStatus	= 0x58,
315 	Config3		= 0x59,
316 	Config4		= 0x5A,	 /* absent on RTL-8139A */
317 	HltClk		= 0x5B,
318 	MultiIntr	= 0x5C,
319 	TxSummary	= 0x60,
320 	BasicModeCtrl	= 0x62,
321 	BasicModeStatus	= 0x64,
322 	NWayAdvert	= 0x66,
323 	NWayLPAR	= 0x68,
324 	NWayExpansion	= 0x6A,
325 	/* Undocumented registers, but required for proper operation. */
326 	FIFOTMS		= 0x70,	 /* FIFO Control and test. */
327 	CSCR		= 0x74,	 /* Chip Status and Configuration Register. */
328 	PARA78		= 0x78,
329 	FlashReg	= 0xD4,	/* Communication with Flash ROM, four bytes. */
330 	PARA7c		= 0x7c,	 /* Magic transceiver parameter register. */
331 	Config5		= 0xD8,	 /* absent on RTL-8139A */
332 };
333 
334 enum ClearBitMasks {
335 	MultiIntrClear	= 0xF000,
336 	ChipCmdClear	= 0xE2,
337 	Config1Clear	= (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
338 };
339 
340 enum ChipCmdBits {
341 	CmdReset	= 0x10,
342 	CmdRxEnb	= 0x08,
343 	CmdTxEnb	= 0x04,
344 	RxBufEmpty	= 0x01,
345 };
346 
347 /* Interrupt register bits, using my own meaningful names. */
348 enum IntrStatusBits {
349 	PCIErr		= 0x8000,
350 	PCSTimeout	= 0x4000,
351 	RxFIFOOver	= 0x40,
352 	RxUnderrun	= 0x20,
353 	RxOverflow	= 0x10,
354 	TxErr		= 0x08,
355 	TxOK		= 0x04,
356 	RxErr		= 0x02,
357 	RxOK		= 0x01,
358 
359 	RxAckBits	= RxFIFOOver | RxOverflow | RxOK,
360 };
361 
362 enum TxStatusBits {
363 	TxHostOwns	= 0x2000,
364 	TxUnderrun	= 0x4000,
365 	TxStatOK	= 0x8000,
366 	TxOutOfWindow	= 0x20000000,
367 	TxAborted	= 0x40000000,
368 	TxCarrierLost	= 0x80000000,
369 };
370 enum RxStatusBits {
371 	RxMulticast	= 0x8000,
372 	RxPhysical	= 0x4000,
373 	RxBroadcast	= 0x2000,
374 	RxBadSymbol	= 0x0020,
375 	RxRunt		= 0x0010,
376 	RxTooLong	= 0x0008,
377 	RxCRCErr	= 0x0004,
378 	RxBadAlign	= 0x0002,
379 	RxStatusOK	= 0x0001,
380 };
381 
382 /* Bits in RxConfig. */
383 enum rx_mode_bits {
384 	AcceptErr	= 0x20,
385 	AcceptRunt	= 0x10,
386 	AcceptBroadcast	= 0x08,
387 	AcceptMulticast	= 0x04,
388 	AcceptMyPhys	= 0x02,
389 	AcceptAllPhys	= 0x01,
390 };
391 
392 /* Bits in TxConfig. */
393 enum tx_config_bits {
394         /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
395         TxIFGShift	= 24,
396         TxIFG84		= (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
397         TxIFG88		= (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
398         TxIFG92		= (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
399         TxIFG96		= (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
400 
401 	TxLoopBack	= (1 << 18) | (1 << 17), /* enable loopback test mode */
402 	TxCRC		= (1 << 16),	/* DISABLE Tx pkt CRC append */
403 	TxClearAbt	= (1 << 0),	/* Clear abort (WO) */
404 	TxDMAShift	= 8, /* DMA burst value (0-7) is shifted X many bits */
405 	TxRetryShift	= 4, /* TXRR value (0-15) is shifted X many bits */
406 
407 	TxVersionMask	= 0x7C800000, /* mask out version bits 30-26, 23 */
408 };
409 
410 /* Bits in Config1 */
411 enum Config1Bits {
412 	Cfg1_PM_Enable	= 0x01,
413 	Cfg1_VPD_Enable	= 0x02,
414 	Cfg1_PIO	= 0x04,
415 	Cfg1_MMIO	= 0x08,
416 	LWAKE		= 0x10,		/* not on 8139, 8139A */
417 	Cfg1_Driver_Load = 0x20,
418 	Cfg1_LED0	= 0x40,
419 	Cfg1_LED1	= 0x80,
420 	SLEEP		= (1 << 1),	/* only on 8139, 8139A */
421 	PWRDN		= (1 << 0),	/* only on 8139, 8139A */
422 };
423 
424 /* Bits in Config3 */
425 enum Config3Bits {
426 	Cfg3_FBtBEn   	= (1 << 0), /* 1	= Fast Back to Back */
427 	Cfg3_FuncRegEn	= (1 << 1), /* 1	= enable CardBus Function registers */
428 	Cfg3_CLKRUN_En	= (1 << 2), /* 1	= enable CLKRUN */
429 	Cfg3_CardB_En 	= (1 << 3), /* 1	= enable CardBus registers */
430 	Cfg3_LinkUp   	= (1 << 4), /* 1	= wake up on link up */
431 	Cfg3_Magic    	= (1 << 5), /* 1	= wake up on Magic Packet (tm) */
432 	Cfg3_PARM_En  	= (1 << 6), /* 0	= software can set twister parameters */
433 	Cfg3_GNTSel   	= (1 << 7), /* 1	= delay 1 clock from PCI GNT signal */
434 };
435 
436 /* Bits in Config4 */
437 enum Config4Bits {
438 	LWPTN	= (1 << 2),	/* not on 8139, 8139A */
439 };
440 
441 /* Bits in Config5 */
442 enum Config5Bits {
443 	Cfg5_PME_STS   	= (1 << 0), /* 1	= PCI reset resets PME_Status */
444 	Cfg5_LANWake   	= (1 << 1), /* 1	= enable LANWake signal */
445 	Cfg5_LDPS      	= (1 << 2), /* 0	= save power when link is down */
446 	Cfg5_FIFOAddrPtr= (1 << 3), /* Realtek internal SRAM testing */
447 	Cfg5_UWF        = (1 << 4), /* 1 = accept unicast wakeup frame */
448 	Cfg5_MWF        = (1 << 5), /* 1 = accept multicast wakeup frame */
449 	Cfg5_BWF        = (1 << 6), /* 1 = accept broadcast wakeup frame */
450 };
451 
452 enum RxConfigBits {
453 	/* rx fifo threshold */
454 	RxCfgFIFOShift	= 13,
455 	RxCfgFIFONone	= (7 << RxCfgFIFOShift),
456 
457 	/* Max DMA burst */
458 	RxCfgDMAShift	= 8,
459 	RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
460 
461 	/* rx ring buffer length */
462 	RxCfgRcv8K	= 0,
463 	RxCfgRcv16K	= (1 << 11),
464 	RxCfgRcv32K	= (1 << 12),
465 	RxCfgRcv64K	= (1 << 11) | (1 << 12),
466 
467 	/* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
468 	RxNoWrap	= (1 << 7),
469 };
470 
471 /* Twister tuning parameters from RealTek.
472    Completely undocumented, but required to tune bad links on some boards. */
473 enum CSCRBits {
474 	CSCR_LinkOKBit		= 0x0400,
475 	CSCR_LinkChangeBit	= 0x0800,
476 	CSCR_LinkStatusBits	= 0x0f000,
477 	CSCR_LinkDownOffCmd	= 0x003c0,
478 	CSCR_LinkDownCmd	= 0x0f3c0,
479 };
480 
481 enum Cfg9346Bits {
482 	Cfg9346_Lock	= 0x00,
483 	Cfg9346_Unlock	= 0xC0,
484 };
485 
486 typedef enum {
487 	CH_8139	= 0,
488 	CH_8139_K,
489 	CH_8139A,
490 	CH_8139A_G,
491 	CH_8139B,
492 	CH_8130,
493 	CH_8139C,
494 	CH_8100,
495 	CH_8100B_8139D,
496 	CH_8101,
497 } chip_t;
498 
499 enum chip_flags {
500 	HasHltClk	= (1 << 0),
501 	HasLWake	= (1 << 1),
502 };
503 
504 #define HW_REVID(b30, b29, b28, b27, b26, b23, b22) \
505 	(b30<<30 | b29<<29 | b28<<28 | b27<<27 | b26<<26 | b23<<23 | b22<<22)
506 #define HW_REVID_MASK	HW_REVID(1, 1, 1, 1, 1, 1, 1)
507 
508 /* directly indexed by chip_t, above */
509 static const struct {
510 	const char *name;
511 	u32 version; /* from RTL8139C/RTL8139D docs */
512 	u32 flags;
513 } rtl_chip_info[] = {
514 	{ "RTL-8139",
515 	  HW_REVID(1, 0, 0, 0, 0, 0, 0),
516 	  HasHltClk,
517 	},
518 
519 	{ "RTL-8139 rev K",
520 	  HW_REVID(1, 1, 0, 0, 0, 0, 0),
521 	  HasHltClk,
522 	},
523 
524 	{ "RTL-8139A",
525 	  HW_REVID(1, 1, 1, 0, 0, 0, 0),
526 	  HasHltClk, /* XXX undocumented? */
527 	},
528 
529 	{ "RTL-8139A rev G",
530 	  HW_REVID(1, 1, 1, 0, 0, 1, 0),
531 	  HasHltClk, /* XXX undocumented? */
532 	},
533 
534 	{ "RTL-8139B",
535 	  HW_REVID(1, 1, 1, 1, 0, 0, 0),
536 	  HasLWake,
537 	},
538 
539 	{ "RTL-8130",
540 	  HW_REVID(1, 1, 1, 1, 1, 0, 0),
541 	  HasLWake,
542 	},
543 
544 	{ "RTL-8139C",
545 	  HW_REVID(1, 1, 1, 0, 1, 0, 0),
546 	  HasLWake,
547 	},
548 
549 	{ "RTL-8100",
550 	  HW_REVID(1, 1, 1, 1, 0, 1, 0),
551 	  HasLWake,
552 	},
553 
554 	{ "RTL-8100B/8139D",
555 	  HW_REVID(1, 1, 1, 0, 1, 0, 1),
556 	  HasHltClk /* XXX undocumented? */
557 	| HasLWake,
558 	},
559 
560 	{ "RTL-8101",
561 	  HW_REVID(1, 1, 1, 0, 1, 1, 1),
562 	  HasLWake,
563 	},
564 };
565 
566 struct rtl_extra_stats {
567 	unsigned long early_rx;
568 	unsigned long tx_buf_mapped;
569 	unsigned long tx_timeouts;
570 	unsigned long rx_lost_in_ring;
571 };
572 
573 struct rtl8139_stats {
574 	u64	packets;
575 	u64	bytes;
576 	struct u64_stats_sync	syncp;
577 };
578 
579 struct rtl8139_private {
580 	void __iomem		*mmio_addr;
581 	int			drv_flags;
582 	struct pci_dev		*pci_dev;
583 	u32			msg_enable;
584 	struct napi_struct	napi;
585 	struct net_device	*dev;
586 
587 	unsigned char		*rx_ring;
588 	unsigned int		cur_rx;	/* RX buf index of next pkt */
589 	struct rtl8139_stats	rx_stats;
590 	dma_addr_t		rx_ring_dma;
591 
592 	unsigned int		tx_flag;
593 	unsigned long		cur_tx;
594 	unsigned long		dirty_tx;
595 	struct rtl8139_stats	tx_stats;
596 	unsigned char		*tx_buf[NUM_TX_DESC];	/* Tx bounce buffers */
597 	unsigned char		*tx_bufs;	/* Tx bounce buffer region. */
598 	dma_addr_t		tx_bufs_dma;
599 
600 	signed char		phys[4];	/* MII device addresses. */
601 
602 				/* Twister tune state. */
603 	char			twistie, twist_row, twist_col;
604 
605 	unsigned int		watchdog_fired : 1;
606 	unsigned int		default_port : 4; /* Last dev->if_port value. */
607 	unsigned int		have_thread : 1;
608 
609 	spinlock_t		lock;
610 	spinlock_t		rx_lock;
611 
612 	chip_t			chipset;
613 	u32			rx_config;
614 	struct rtl_extra_stats	xstats;
615 
616 	struct delayed_work	thread;
617 
618 	struct mii_if_info	mii;
619 	unsigned int		regs_len;
620 	unsigned long		fifo_copy_timeout;
621 };
622 
623 MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
624 MODULE_DESCRIPTION ("RealTek RTL-8139 Fast Ethernet driver");
625 MODULE_LICENSE("GPL");
626 MODULE_VERSION(DRV_VERSION);
627 
628 module_param(use_io, bool, 0);
629 MODULE_PARM_DESC(use_io, "Force use of I/O access mode. 0=MMIO 1=PIO");
630 module_param(multicast_filter_limit, int, 0);
631 module_param_array(media, int, NULL, 0);
632 module_param_array(full_duplex, int, NULL, 0);
633 module_param(debug, int, 0);
634 MODULE_PARM_DESC (debug, "8139too bitmapped message enable number");
635 MODULE_PARM_DESC (multicast_filter_limit, "8139too maximum number of filtered multicast addresses");
636 MODULE_PARM_DESC (media, "8139too: Bits 4+9: force full duplex, bit 5: 100Mbps");
637 MODULE_PARM_DESC (full_duplex, "8139too: Force full duplex for board(s) (1)");
638 
639 static int read_eeprom (void __iomem *ioaddr, int location, int addr_len);
640 static int rtl8139_open (struct net_device *dev);
641 static int mdio_read (struct net_device *dev, int phy_id, int location);
642 static void mdio_write (struct net_device *dev, int phy_id, int location,
643 			int val);
644 static void rtl8139_start_thread(struct rtl8139_private *tp);
645 static void rtl8139_tx_timeout (struct net_device *dev, unsigned int txqueue);
646 static void rtl8139_init_ring (struct net_device *dev);
647 static netdev_tx_t rtl8139_start_xmit (struct sk_buff *skb,
648 				       struct net_device *dev);
649 #ifdef CONFIG_NET_POLL_CONTROLLER
650 static void rtl8139_poll_controller(struct net_device *dev);
651 #endif
652 static int rtl8139_set_mac_address(struct net_device *dev, void *p);
653 static int rtl8139_poll(struct napi_struct *napi, int budget);
654 static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance);
655 static int rtl8139_close (struct net_device *dev);
656 static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
657 static void rtl8139_get_stats64(struct net_device *dev,
658 				struct rtnl_link_stats64 *stats);
659 static void rtl8139_set_rx_mode (struct net_device *dev);
660 static void __set_rx_mode (struct net_device *dev);
661 static void rtl8139_hw_start (struct net_device *dev);
662 static void rtl8139_thread (struct work_struct *work);
663 static void rtl8139_tx_timeout_task(struct work_struct *work);
664 static const struct ethtool_ops rtl8139_ethtool_ops;
665 
666 /* write MMIO register, with flush */
667 /* Flush avoids rtl8139 bug w/ posted MMIO writes */
668 #define RTL_W8_F(reg, val8)	do { iowrite8 ((val8), ioaddr + (reg)); ioread8 (ioaddr + (reg)); } while (0)
669 #define RTL_W16_F(reg, val16)	do { iowrite16 ((val16), ioaddr + (reg)); ioread16 (ioaddr + (reg)); } while (0)
670 #define RTL_W32_F(reg, val32)	do { iowrite32 ((val32), ioaddr + (reg)); ioread32 (ioaddr + (reg)); } while (0)
671 
672 /* write MMIO register */
673 #define RTL_W8(reg, val8)	iowrite8 ((val8), ioaddr + (reg))
674 #define RTL_W16(reg, val16)	iowrite16 ((val16), ioaddr + (reg))
675 #define RTL_W32(reg, val32)	iowrite32 ((val32), ioaddr + (reg))
676 
677 /* read MMIO register */
678 #define RTL_R8(reg)		ioread8 (ioaddr + (reg))
679 #define RTL_R16(reg)		ioread16 (ioaddr + (reg))
680 #define RTL_R32(reg)		ioread32 (ioaddr + (reg))
681 
682 
683 static const u16 rtl8139_intr_mask =
684 	PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
685 	TxErr | TxOK | RxErr | RxOK;
686 
687 static const u16 rtl8139_norx_intr_mask =
688 	PCIErr | PCSTimeout | RxUnderrun |
689 	TxErr | TxOK | RxErr ;
690 
691 #if RX_BUF_IDX == 0
692 static const unsigned int rtl8139_rx_config =
693 	RxCfgRcv8K | RxNoWrap |
694 	(RX_FIFO_THRESH << RxCfgFIFOShift) |
695 	(RX_DMA_BURST << RxCfgDMAShift);
696 #elif RX_BUF_IDX == 1
697 static const unsigned int rtl8139_rx_config =
698 	RxCfgRcv16K | RxNoWrap |
699 	(RX_FIFO_THRESH << RxCfgFIFOShift) |
700 	(RX_DMA_BURST << RxCfgDMAShift);
701 #elif RX_BUF_IDX == 2
702 static const unsigned int rtl8139_rx_config =
703 	RxCfgRcv32K | RxNoWrap |
704 	(RX_FIFO_THRESH << RxCfgFIFOShift) |
705 	(RX_DMA_BURST << RxCfgDMAShift);
706 #elif RX_BUF_IDX == 3
707 static const unsigned int rtl8139_rx_config =
708 	RxCfgRcv64K |
709 	(RX_FIFO_THRESH << RxCfgFIFOShift) |
710 	(RX_DMA_BURST << RxCfgDMAShift);
711 #else
712 #error "Invalid configuration for 8139_RXBUF_IDX"
713 #endif
714 
715 static const unsigned int rtl8139_tx_config =
716 	TxIFG96 | (TX_DMA_BURST << TxDMAShift) | (TX_RETRY << TxRetryShift);
717 
__rtl8139_cleanup_dev(struct net_device * dev)718 static void __rtl8139_cleanup_dev (struct net_device *dev)
719 {
720 	struct rtl8139_private *tp = netdev_priv(dev);
721 	struct pci_dev *pdev;
722 
723 	assert (dev != NULL);
724 	assert (tp->pci_dev != NULL);
725 	pdev = tp->pci_dev;
726 
727 	if (tp->mmio_addr)
728 		pci_iounmap (pdev, tp->mmio_addr);
729 
730 	/* it's ok to call this even if we have no regions to free */
731 	pci_release_regions (pdev);
732 
733 	free_netdev(dev);
734 }
735 
736 
rtl8139_chip_reset(void __iomem * ioaddr)737 static void rtl8139_chip_reset (void __iomem *ioaddr)
738 {
739 	int i;
740 
741 	/* Soft reset the chip. */
742 	RTL_W8 (ChipCmd, CmdReset);
743 
744 	/* Check that the chip has finished the reset. */
745 	for (i = 1000; i > 0; i--) {
746 		barrier();
747 		if ((RTL_R8 (ChipCmd) & CmdReset) == 0)
748 			break;
749 		udelay (10);
750 	}
751 }
752 
753 
rtl8139_init_board(struct pci_dev * pdev)754 static struct net_device *rtl8139_init_board(struct pci_dev *pdev)
755 {
756 	struct device *d = &pdev->dev;
757 	void __iomem *ioaddr;
758 	struct net_device *dev;
759 	struct rtl8139_private *tp;
760 	u8 tmp8;
761 	int rc, disable_dev_on_err = 0;
762 	unsigned int i, bar;
763 	unsigned long io_len;
764 	u32 version;
765 	static const struct {
766 		unsigned long mask;
767 		char *type;
768 	} res[] = {
769 		{ IORESOURCE_IO,  "PIO" },
770 		{ IORESOURCE_MEM, "MMIO" }
771 	};
772 
773 	assert (pdev != NULL);
774 
775 	/* dev and priv zeroed in alloc_etherdev */
776 	dev = alloc_etherdev (sizeof (*tp));
777 	if (dev == NULL)
778 		return ERR_PTR(-ENOMEM);
779 
780 	SET_NETDEV_DEV(dev, &pdev->dev);
781 
782 	tp = netdev_priv(dev);
783 	tp->pci_dev = pdev;
784 
785 	/* enable device (incl. PCI PM wakeup and hotplug setup) */
786 	rc = pci_enable_device (pdev);
787 	if (rc)
788 		goto err_out;
789 
790 	disable_dev_on_err = 1;
791 	rc = pci_request_regions (pdev, DRV_NAME);
792 	if (rc)
793 		goto err_out;
794 
795 	pci_set_master (pdev);
796 
797 	u64_stats_init(&tp->rx_stats.syncp);
798 	u64_stats_init(&tp->tx_stats.syncp);
799 
800 retry:
801 	/* PIO bar register comes first. */
802 	bar = !use_io;
803 
804 	io_len = pci_resource_len(pdev, bar);
805 
806 	dev_dbg(d, "%s region size = 0x%02lX\n", res[bar].type, io_len);
807 
808 	if (!(pci_resource_flags(pdev, bar) & res[bar].mask)) {
809 		dev_err(d, "region #%d not a %s resource, aborting\n", bar,
810 			res[bar].type);
811 		rc = -ENODEV;
812 		goto err_out;
813 	}
814 	if (io_len < RTL_MIN_IO_SIZE) {
815 		dev_err(d, "Invalid PCI %s region size(s), aborting\n",
816 			res[bar].type);
817 		rc = -ENODEV;
818 		goto err_out;
819 	}
820 
821 	ioaddr = pci_iomap(pdev, bar, 0);
822 	if (!ioaddr) {
823 		dev_err(d, "cannot map %s\n", res[bar].type);
824 		if (!use_io) {
825 			use_io = true;
826 			goto retry;
827 		}
828 		rc = -ENODEV;
829 		goto err_out;
830 	}
831 	tp->regs_len = io_len;
832 	tp->mmio_addr = ioaddr;
833 
834 	/* Bring old chips out of low-power mode. */
835 	RTL_W8 (HltClk, 'R');
836 
837 	/* check for missing/broken hardware */
838 	if (RTL_R32 (TxConfig) == 0xFFFFFFFF) {
839 		dev_err(&pdev->dev, "Chip not responding, ignoring board\n");
840 		rc = -EIO;
841 		goto err_out;
842 	}
843 
844 	/* identify chip attached to board */
845 	version = RTL_R32 (TxConfig) & HW_REVID_MASK;
846 	for (i = 0; i < ARRAY_SIZE (rtl_chip_info); i++)
847 		if (version == rtl_chip_info[i].version) {
848 			tp->chipset = i;
849 			goto match;
850 		}
851 
852 	/* if unknown chip, assume array element #0, original RTL-8139 in this case */
853 	i = 0;
854 	dev_dbg(&pdev->dev, "unknown chip version, assuming RTL-8139\n");
855 	dev_dbg(&pdev->dev, "TxConfig = 0x%x\n", RTL_R32 (TxConfig));
856 	tp->chipset = 0;
857 
858 match:
859 	pr_debug("chipset id (%d) == index %d, '%s'\n",
860 		 version, i, rtl_chip_info[i].name);
861 
862 	if (tp->chipset >= CH_8139B) {
863 		u8 new_tmp8 = tmp8 = RTL_R8 (Config1);
864 		pr_debug("PCI PM wakeup\n");
865 		if ((rtl_chip_info[tp->chipset].flags & HasLWake) &&
866 		    (tmp8 & LWAKE))
867 			new_tmp8 &= ~LWAKE;
868 		new_tmp8 |= Cfg1_PM_Enable;
869 		if (new_tmp8 != tmp8) {
870 			RTL_W8 (Cfg9346, Cfg9346_Unlock);
871 			RTL_W8 (Config1, tmp8);
872 			RTL_W8 (Cfg9346, Cfg9346_Lock);
873 		}
874 		if (rtl_chip_info[tp->chipset].flags & HasLWake) {
875 			tmp8 = RTL_R8 (Config4);
876 			if (tmp8 & LWPTN) {
877 				RTL_W8 (Cfg9346, Cfg9346_Unlock);
878 				RTL_W8 (Config4, tmp8 & ~LWPTN);
879 				RTL_W8 (Cfg9346, Cfg9346_Lock);
880 			}
881 		}
882 	} else {
883 		pr_debug("Old chip wakeup\n");
884 		tmp8 = RTL_R8 (Config1);
885 		tmp8 &= ~(SLEEP | PWRDN);
886 		RTL_W8 (Config1, tmp8);
887 	}
888 
889 	rtl8139_chip_reset (ioaddr);
890 
891 	return dev;
892 
893 err_out:
894 	__rtl8139_cleanup_dev (dev);
895 	if (disable_dev_on_err)
896 		pci_disable_device (pdev);
897 	return ERR_PTR(rc);
898 }
899 
rtl8139_set_features(struct net_device * dev,netdev_features_t features)900 static int rtl8139_set_features(struct net_device *dev, netdev_features_t features)
901 {
902 	struct rtl8139_private *tp = netdev_priv(dev);
903 	unsigned long flags;
904 	netdev_features_t changed = features ^ dev->features;
905 	void __iomem *ioaddr = tp->mmio_addr;
906 
907 	if (!(changed & (NETIF_F_RXALL)))
908 		return 0;
909 
910 	spin_lock_irqsave(&tp->lock, flags);
911 
912 	if (changed & NETIF_F_RXALL) {
913 		int rx_mode = tp->rx_config;
914 		if (features & NETIF_F_RXALL)
915 			rx_mode |= (AcceptErr | AcceptRunt);
916 		else
917 			rx_mode &= ~(AcceptErr | AcceptRunt);
918 		tp->rx_config = rtl8139_rx_config | rx_mode;
919 		RTL_W32_F(RxConfig, tp->rx_config);
920 	}
921 
922 	spin_unlock_irqrestore(&tp->lock, flags);
923 
924 	return 0;
925 }
926 
927 static const struct net_device_ops rtl8139_netdev_ops = {
928 	.ndo_open		= rtl8139_open,
929 	.ndo_stop		= rtl8139_close,
930 	.ndo_get_stats64	= rtl8139_get_stats64,
931 	.ndo_validate_addr	= eth_validate_addr,
932 	.ndo_set_mac_address 	= rtl8139_set_mac_address,
933 	.ndo_start_xmit		= rtl8139_start_xmit,
934 	.ndo_set_rx_mode	= rtl8139_set_rx_mode,
935 	.ndo_eth_ioctl		= netdev_ioctl,
936 	.ndo_tx_timeout		= rtl8139_tx_timeout,
937 #ifdef CONFIG_NET_POLL_CONTROLLER
938 	.ndo_poll_controller	= rtl8139_poll_controller,
939 #endif
940 	.ndo_set_features	= rtl8139_set_features,
941 };
942 
rtl8139_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)943 static int rtl8139_init_one(struct pci_dev *pdev,
944 			    const struct pci_device_id *ent)
945 {
946 	struct net_device *dev = NULL;
947 	struct rtl8139_private *tp;
948 	__le16 addr[ETH_ALEN / 2];
949 	int i, addr_len, option;
950 	void __iomem *ioaddr;
951 	static int board_idx = -1;
952 
953 	assert (pdev != NULL);
954 	assert (ent != NULL);
955 
956 	board_idx++;
957 
958 	/* when we're built into the kernel, the driver version message
959 	 * is only printed if at least one 8139 board has been found
960 	 */
961 #ifndef MODULE
962 	{
963 		static int printed_version;
964 		if (!printed_version++)
965 			pr_info(RTL8139_DRIVER_NAME "\n");
966 	}
967 #endif
968 
969 	if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
970 	    pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pdev->revision >= 0x20) {
971 		dev_info(&pdev->dev,
972 			   "This (id %04x:%04x rev %02x) is an enhanced 8139C+ chip, use 8139cp\n",
973 		       	   pdev->vendor, pdev->device, pdev->revision);
974 		return -ENODEV;
975 	}
976 
977 	if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
978 	    pdev->device == PCI_DEVICE_ID_REALTEK_8139 &&
979 	    pdev->subsystem_vendor == PCI_VENDOR_ID_ATHEROS &&
980 	    pdev->subsystem_device == PCI_DEVICE_ID_REALTEK_8139) {
981 		pr_info("OQO Model 2 detected. Forcing PIO\n");
982 		use_io = true;
983 	}
984 
985 	dev = rtl8139_init_board (pdev);
986 	if (IS_ERR(dev))
987 		return PTR_ERR(dev);
988 
989 	assert (dev != NULL);
990 	tp = netdev_priv(dev);
991 	tp->dev = dev;
992 
993 	ioaddr = tp->mmio_addr;
994 	assert (ioaddr != NULL);
995 
996 	addr_len = read_eeprom (ioaddr, 0, 8) == 0x8129 ? 8 : 6;
997 	for (i = 0; i < 3; i++)
998 		addr[i] = cpu_to_le16(read_eeprom (ioaddr, i + 7, addr_len));
999 	eth_hw_addr_set(dev, (u8 *)addr);
1000 
1001 	/* The Rtl8139-specific entries in the device structure. */
1002 	dev->netdev_ops = &rtl8139_netdev_ops;
1003 	dev->ethtool_ops = &rtl8139_ethtool_ops;
1004 	dev->watchdog_timeo = TX_TIMEOUT;
1005 	netif_napi_add(dev, &tp->napi, rtl8139_poll, 64);
1006 
1007 	/* note: the hardware is not capable of sg/csum/highdma, however
1008 	 * through the use of skb_copy_and_csum_dev we enable these
1009 	 * features
1010 	 */
1011 	dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
1012 	dev->vlan_features = dev->features;
1013 
1014 	dev->hw_features |= NETIF_F_RXALL;
1015 	dev->hw_features |= NETIF_F_RXFCS;
1016 
1017 	/* MTU range: 68 - 1770 */
1018 	dev->min_mtu = ETH_MIN_MTU;
1019 	dev->max_mtu = MAX_ETH_DATA_SIZE;
1020 
1021 	/* tp zeroed and aligned in alloc_etherdev */
1022 	tp = netdev_priv(dev);
1023 
1024 	/* note: tp->chipset set in rtl8139_init_board */
1025 	tp->drv_flags = board_info[ent->driver_data].hw_flags;
1026 	tp->mmio_addr = ioaddr;
1027 	tp->msg_enable =
1028 		(debug < 0 ? RTL8139_DEF_MSG_ENABLE : ((1 << debug) - 1));
1029 	spin_lock_init (&tp->lock);
1030 	spin_lock_init (&tp->rx_lock);
1031 	INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
1032 	tp->mii.dev = dev;
1033 	tp->mii.mdio_read = mdio_read;
1034 	tp->mii.mdio_write = mdio_write;
1035 	tp->mii.phy_id_mask = 0x3f;
1036 	tp->mii.reg_num_mask = 0x1f;
1037 
1038 	/* dev is fully set up and ready to use now */
1039 	pr_debug("about to register device named %s (%p)...\n",
1040 		 dev->name, dev);
1041 	i = register_netdev (dev);
1042 	if (i) goto err_out;
1043 
1044 	pci_set_drvdata (pdev, dev);
1045 
1046 	netdev_info(dev, "%s at 0x%p, %pM, IRQ %d\n",
1047 		    board_info[ent->driver_data].name,
1048 		    ioaddr, dev->dev_addr, pdev->irq);
1049 
1050 	netdev_dbg(dev, "Identified 8139 chip type '%s'\n",
1051 		   rtl_chip_info[tp->chipset].name);
1052 
1053 	/* Find the connected MII xcvrs.
1054 	   Doing this in open() would allow detecting external xcvrs later, but
1055 	   takes too much time. */
1056 #ifdef CONFIG_8139TOO_8129
1057 	if (tp->drv_flags & HAS_MII_XCVR) {
1058 		int phy, phy_idx = 0;
1059 		for (phy = 0; phy < 32 && phy_idx < sizeof(tp->phys); phy++) {
1060 			int mii_status = mdio_read(dev, phy, 1);
1061 			if (mii_status != 0xffff  &&  mii_status != 0x0000) {
1062 				u16 advertising = mdio_read(dev, phy, 4);
1063 				tp->phys[phy_idx++] = phy;
1064 				netdev_info(dev, "MII transceiver %d status 0x%04x advertising %04x\n",
1065 					    phy, mii_status, advertising);
1066 			}
1067 		}
1068 		if (phy_idx == 0) {
1069 			netdev_info(dev, "No MII transceivers found! Assuming SYM transceiver\n");
1070 			tp->phys[0] = 32;
1071 		}
1072 	} else
1073 #endif
1074 		tp->phys[0] = 32;
1075 	tp->mii.phy_id = tp->phys[0];
1076 
1077 	/* The lower four bits are the media type. */
1078 	option = (board_idx >= MAX_UNITS) ? 0 : media[board_idx];
1079 	if (option > 0) {
1080 		tp->mii.full_duplex = (option & 0x210) ? 1 : 0;
1081 		tp->default_port = option & 0xFF;
1082 		if (tp->default_port)
1083 			tp->mii.force_media = 1;
1084 	}
1085 	if (board_idx < MAX_UNITS  &&  full_duplex[board_idx] > 0)
1086 		tp->mii.full_duplex = full_duplex[board_idx];
1087 	if (tp->mii.full_duplex) {
1088 		netdev_info(dev, "Media type forced to Full Duplex\n");
1089 		/* Changing the MII-advertised media because might prevent
1090 		   re-connection. */
1091 		tp->mii.force_media = 1;
1092 	}
1093 	if (tp->default_port) {
1094 		netdev_info(dev, "  Forcing %dMbps %s-duplex operation\n",
1095 			    (option & 0x20 ? 100 : 10),
1096 			    (option & 0x10 ? "full" : "half"));
1097 		mdio_write(dev, tp->phys[0], 0,
1098 				   ((option & 0x20) ? 0x2000 : 0) | 	/* 100Mbps? */
1099 				   ((option & 0x10) ? 0x0100 : 0)); /* Full duplex? */
1100 	}
1101 
1102 	/* Put the chip into low-power mode. */
1103 	if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1104 		RTL_W8 (HltClk, 'H');	/* 'R' would leave the clock running. */
1105 
1106 	return 0;
1107 
1108 err_out:
1109 	__rtl8139_cleanup_dev (dev);
1110 	pci_disable_device (pdev);
1111 	return i;
1112 }
1113 
1114 
rtl8139_remove_one(struct pci_dev * pdev)1115 static void rtl8139_remove_one(struct pci_dev *pdev)
1116 {
1117 	struct net_device *dev = pci_get_drvdata (pdev);
1118 	struct rtl8139_private *tp = netdev_priv(dev);
1119 
1120 	assert (dev != NULL);
1121 
1122 	cancel_delayed_work_sync(&tp->thread);
1123 
1124 	unregister_netdev (dev);
1125 
1126 	__rtl8139_cleanup_dev (dev);
1127 	pci_disable_device (pdev);
1128 }
1129 
1130 
1131 /* Serial EEPROM section. */
1132 
1133 /*  EEPROM_Ctrl bits. */
1134 #define EE_SHIFT_CLK	0x04	/* EEPROM shift clock. */
1135 #define EE_CS			0x08	/* EEPROM chip select. */
1136 #define EE_DATA_WRITE	0x02	/* EEPROM chip data in. */
1137 #define EE_WRITE_0		0x00
1138 #define EE_WRITE_1		0x02
1139 #define EE_DATA_READ	0x01	/* EEPROM chip data out. */
1140 #define EE_ENB			(0x80 | EE_CS)
1141 
1142 /* Delay between EEPROM clock transitions.
1143    No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1144  */
1145 
1146 #define eeprom_delay()	(void)RTL_R8(Cfg9346)
1147 
1148 /* The EEPROM commands include the alway-set leading bit. */
1149 #define EE_WRITE_CMD	(5)
1150 #define EE_READ_CMD		(6)
1151 #define EE_ERASE_CMD	(7)
1152 
read_eeprom(void __iomem * ioaddr,int location,int addr_len)1153 static int read_eeprom(void __iomem *ioaddr, int location, int addr_len)
1154 {
1155 	int i;
1156 	unsigned retval = 0;
1157 	int read_cmd = location | (EE_READ_CMD << addr_len);
1158 
1159 	RTL_W8 (Cfg9346, EE_ENB & ~EE_CS);
1160 	RTL_W8 (Cfg9346, EE_ENB);
1161 	eeprom_delay ();
1162 
1163 	/* Shift the read command bits out. */
1164 	for (i = 4 + addr_len; i >= 0; i--) {
1165 		int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1166 		RTL_W8 (Cfg9346, EE_ENB | dataval);
1167 		eeprom_delay ();
1168 		RTL_W8 (Cfg9346, EE_ENB | dataval | EE_SHIFT_CLK);
1169 		eeprom_delay ();
1170 	}
1171 	RTL_W8 (Cfg9346, EE_ENB);
1172 	eeprom_delay ();
1173 
1174 	for (i = 16; i > 0; i--) {
1175 		RTL_W8 (Cfg9346, EE_ENB | EE_SHIFT_CLK);
1176 		eeprom_delay ();
1177 		retval =
1178 		    (retval << 1) | ((RTL_R8 (Cfg9346) & EE_DATA_READ) ? 1 :
1179 				     0);
1180 		RTL_W8 (Cfg9346, EE_ENB);
1181 		eeprom_delay ();
1182 	}
1183 
1184 	/* Terminate the EEPROM access. */
1185 	RTL_W8(Cfg9346, 0);
1186 	eeprom_delay ();
1187 
1188 	return retval;
1189 }
1190 
1191 /* MII serial management: mostly bogus for now. */
1192 /* Read and write the MII management registers using software-generated
1193    serial MDIO protocol.
1194    The maximum data clock rate is 2.5 Mhz.  The minimum timing is usually
1195    met by back-to-back PCI I/O cycles, but we insert a delay to avoid
1196    "overclocking" issues. */
1197 #define MDIO_DIR		0x80
1198 #define MDIO_DATA_OUT	0x04
1199 #define MDIO_DATA_IN	0x02
1200 #define MDIO_CLK		0x01
1201 #define MDIO_WRITE0 (MDIO_DIR)
1202 #define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
1203 
1204 #define mdio_delay()	RTL_R8(Config4)
1205 
1206 
1207 static const char mii_2_8139_map[8] = {
1208 	BasicModeCtrl,
1209 	BasicModeStatus,
1210 	0,
1211 	0,
1212 	NWayAdvert,
1213 	NWayLPAR,
1214 	NWayExpansion,
1215 	0
1216 };
1217 
1218 
1219 #ifdef CONFIG_8139TOO_8129
1220 /* Syncronize the MII management interface by shifting 32 one bits out. */
mdio_sync(void __iomem * ioaddr)1221 static void mdio_sync (void __iomem *ioaddr)
1222 {
1223 	int i;
1224 
1225 	for (i = 32; i >= 0; i--) {
1226 		RTL_W8 (Config4, MDIO_WRITE1);
1227 		mdio_delay ();
1228 		RTL_W8 (Config4, MDIO_WRITE1 | MDIO_CLK);
1229 		mdio_delay ();
1230 	}
1231 }
1232 #endif
1233 
mdio_read(struct net_device * dev,int phy_id,int location)1234 static int mdio_read (struct net_device *dev, int phy_id, int location)
1235 {
1236 	struct rtl8139_private *tp = netdev_priv(dev);
1237 	int retval = 0;
1238 #ifdef CONFIG_8139TOO_8129
1239 	void __iomem *ioaddr = tp->mmio_addr;
1240 	int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
1241 	int i;
1242 #endif
1243 
1244 	if (phy_id > 31) {	/* Really a 8139.  Use internal registers. */
1245 		void __iomem *ioaddr = tp->mmio_addr;
1246 		return location < 8 && mii_2_8139_map[location] ?
1247 		    RTL_R16 (mii_2_8139_map[location]) : 0;
1248 	}
1249 
1250 #ifdef CONFIG_8139TOO_8129
1251 	mdio_sync (ioaddr);
1252 	/* Shift the read command bits out. */
1253 	for (i = 15; i >= 0; i--) {
1254 		int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0;
1255 
1256 		RTL_W8 (Config4, MDIO_DIR | dataval);
1257 		mdio_delay ();
1258 		RTL_W8 (Config4, MDIO_DIR | dataval | MDIO_CLK);
1259 		mdio_delay ();
1260 	}
1261 
1262 	/* Read the two transition, 16 data, and wire-idle bits. */
1263 	for (i = 19; i > 0; i--) {
1264 		RTL_W8 (Config4, 0);
1265 		mdio_delay ();
1266 		retval = (retval << 1) | ((RTL_R8 (Config4) & MDIO_DATA_IN) ? 1 : 0);
1267 		RTL_W8 (Config4, MDIO_CLK);
1268 		mdio_delay ();
1269 	}
1270 #endif
1271 
1272 	return (retval >> 1) & 0xffff;
1273 }
1274 
1275 
mdio_write(struct net_device * dev,int phy_id,int location,int value)1276 static void mdio_write (struct net_device *dev, int phy_id, int location,
1277 			int value)
1278 {
1279 	struct rtl8139_private *tp = netdev_priv(dev);
1280 #ifdef CONFIG_8139TOO_8129
1281 	void __iomem *ioaddr = tp->mmio_addr;
1282 	int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location << 18) | value;
1283 	int i;
1284 #endif
1285 
1286 	if (phy_id > 31) {	/* Really a 8139.  Use internal registers. */
1287 		void __iomem *ioaddr = tp->mmio_addr;
1288 		if (location == 0) {
1289 			RTL_W8 (Cfg9346, Cfg9346_Unlock);
1290 			RTL_W16 (BasicModeCtrl, value);
1291 			RTL_W8 (Cfg9346, Cfg9346_Lock);
1292 		} else if (location < 8 && mii_2_8139_map[location])
1293 			RTL_W16 (mii_2_8139_map[location], value);
1294 		return;
1295 	}
1296 
1297 #ifdef CONFIG_8139TOO_8129
1298 	mdio_sync (ioaddr);
1299 
1300 	/* Shift the command bits out. */
1301 	for (i = 31; i >= 0; i--) {
1302 		int dataval =
1303 		    (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
1304 		RTL_W8 (Config4, dataval);
1305 		mdio_delay ();
1306 		RTL_W8 (Config4, dataval | MDIO_CLK);
1307 		mdio_delay ();
1308 	}
1309 	/* Clear out extra bits. */
1310 	for (i = 2; i > 0; i--) {
1311 		RTL_W8 (Config4, 0);
1312 		mdio_delay ();
1313 		RTL_W8 (Config4, MDIO_CLK);
1314 		mdio_delay ();
1315 	}
1316 #endif
1317 }
1318 
1319 
rtl8139_open(struct net_device * dev)1320 static int rtl8139_open (struct net_device *dev)
1321 {
1322 	struct rtl8139_private *tp = netdev_priv(dev);
1323 	void __iomem *ioaddr = tp->mmio_addr;
1324 	const int irq = tp->pci_dev->irq;
1325 	int retval;
1326 
1327 	retval = request_irq(irq, rtl8139_interrupt, IRQF_SHARED, dev->name, dev);
1328 	if (retval)
1329 		return retval;
1330 
1331 	tp->tx_bufs = dma_alloc_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
1332 					   &tp->tx_bufs_dma, GFP_KERNEL);
1333 	tp->rx_ring = dma_alloc_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
1334 					   &tp->rx_ring_dma, GFP_KERNEL);
1335 	if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
1336 		free_irq(irq, dev);
1337 
1338 		if (tp->tx_bufs)
1339 			dma_free_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
1340 					    tp->tx_bufs, tp->tx_bufs_dma);
1341 		if (tp->rx_ring)
1342 			dma_free_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
1343 					    tp->rx_ring, tp->rx_ring_dma);
1344 
1345 		return -ENOMEM;
1346 
1347 	}
1348 
1349 	napi_enable(&tp->napi);
1350 
1351 	tp->mii.full_duplex = tp->mii.force_media;
1352 	tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
1353 
1354 	rtl8139_init_ring (dev);
1355 	rtl8139_hw_start (dev);
1356 	netif_start_queue (dev);
1357 
1358 	netif_dbg(tp, ifup, dev,
1359 		  "%s() ioaddr %#llx IRQ %d GP Pins %02x %s-duplex\n",
1360 		  __func__,
1361 		  (unsigned long long)pci_resource_start (tp->pci_dev, 1),
1362 		  irq, RTL_R8 (MediaStatus),
1363 		  tp->mii.full_duplex ? "full" : "half");
1364 
1365 	rtl8139_start_thread(tp);
1366 
1367 	return 0;
1368 }
1369 
1370 
rtl_check_media(struct net_device * dev,unsigned int init_media)1371 static void rtl_check_media (struct net_device *dev, unsigned int init_media)
1372 {
1373 	struct rtl8139_private *tp = netdev_priv(dev);
1374 
1375 	if (tp->phys[0] >= 0) {
1376 		mii_check_media(&tp->mii, netif_msg_link(tp), init_media);
1377 	}
1378 }
1379 
1380 /* Start the hardware at open or resume. */
rtl8139_hw_start(struct net_device * dev)1381 static void rtl8139_hw_start (struct net_device *dev)
1382 {
1383 	struct rtl8139_private *tp = netdev_priv(dev);
1384 	void __iomem *ioaddr = tp->mmio_addr;
1385 	u32 i;
1386 	u8 tmp;
1387 
1388 	/* Bring old chips out of low-power mode. */
1389 	if (rtl_chip_info[tp->chipset].flags & HasHltClk)
1390 		RTL_W8 (HltClk, 'R');
1391 
1392 	rtl8139_chip_reset (ioaddr);
1393 
1394 	/* unlock Config[01234] and BMCR register writes */
1395 	RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1396 	/* Restore our idea of the MAC address. */
1397 	RTL_W32_F (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1398 	RTL_W32_F (MAC0 + 4, le16_to_cpu (*(__le16 *) (dev->dev_addr + 4)));
1399 
1400 	tp->cur_rx = 0;
1401 
1402 	/* init Rx ring buffer DMA address */
1403 	RTL_W32_F (RxBuf, tp->rx_ring_dma);
1404 
1405 	/* Must enable Tx/Rx before setting transfer thresholds! */
1406 	RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1407 
1408 	tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1409 	RTL_W32 (RxConfig, tp->rx_config);
1410 	RTL_W32 (TxConfig, rtl8139_tx_config);
1411 
1412 	rtl_check_media (dev, 1);
1413 
1414 	if (tp->chipset >= CH_8139B) {
1415 		/* Disable magic packet scanning, which is enabled
1416 		 * when PM is enabled in Config1.  It can be reenabled
1417 		 * via ETHTOOL_SWOL if desired.  */
1418 		RTL_W8 (Config3, RTL_R8 (Config3) & ~Cfg3_Magic);
1419 	}
1420 
1421 	netdev_dbg(dev, "init buffer addresses\n");
1422 
1423 	/* Lock Config[01234] and BMCR register writes */
1424 	RTL_W8 (Cfg9346, Cfg9346_Lock);
1425 
1426 	/* init Tx buffer DMA addresses */
1427 	for (i = 0; i < NUM_TX_DESC; i++)
1428 		RTL_W32_F (TxAddr0 + (i * 4), tp->tx_bufs_dma + (tp->tx_buf[i] - tp->tx_bufs));
1429 
1430 	RTL_W32 (RxMissed, 0);
1431 
1432 	rtl8139_set_rx_mode (dev);
1433 
1434 	/* no early-rx interrupts */
1435 	RTL_W16 (MultiIntr, RTL_R16 (MultiIntr) & MultiIntrClear);
1436 
1437 	/* make sure RxTx has started */
1438 	tmp = RTL_R8 (ChipCmd);
1439 	if ((!(tmp & CmdRxEnb)) || (!(tmp & CmdTxEnb)))
1440 		RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1441 
1442 	/* Enable all known interrupts by setting the interrupt mask. */
1443 	RTL_W16 (IntrMask, rtl8139_intr_mask);
1444 }
1445 
1446 
1447 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
rtl8139_init_ring(struct net_device * dev)1448 static void rtl8139_init_ring (struct net_device *dev)
1449 {
1450 	struct rtl8139_private *tp = netdev_priv(dev);
1451 	int i;
1452 
1453 	tp->cur_rx = 0;
1454 	tp->cur_tx = 0;
1455 	tp->dirty_tx = 0;
1456 
1457 	for (i = 0; i < NUM_TX_DESC; i++)
1458 		tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
1459 }
1460 
1461 
1462 /* This must be global for CONFIG_8139TOO_TUNE_TWISTER case */
1463 static int next_tick = 3 * HZ;
1464 
1465 #ifndef CONFIG_8139TOO_TUNE_TWISTER
rtl8139_tune_twister(struct net_device * dev,struct rtl8139_private * tp)1466 static inline void rtl8139_tune_twister (struct net_device *dev,
1467 				  struct rtl8139_private *tp) {}
1468 #else
1469 enum TwisterParamVals {
1470 	PARA78_default	= 0x78fa8388,
1471 	PARA7c_default	= 0xcb38de43,	/* param[0][3] */
1472 	PARA7c_xxx	= 0xcb38de43,
1473 };
1474 
1475 static const unsigned long param[4][4] = {
1476 	{0xcb39de43, 0xcb39ce43, 0xfb38de03, 0xcb38de43},
1477 	{0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1478 	{0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
1479 	{0xbb39de43, 0xbb39ce43, 0xbb39ce83, 0xbb39ce83}
1480 };
1481 
rtl8139_tune_twister(struct net_device * dev,struct rtl8139_private * tp)1482 static void rtl8139_tune_twister (struct net_device *dev,
1483 				  struct rtl8139_private *tp)
1484 {
1485 	int linkcase;
1486 	void __iomem *ioaddr = tp->mmio_addr;
1487 
1488 	/* This is a complicated state machine to configure the "twister" for
1489 	   impedance/echos based on the cable length.
1490 	   All of this is magic and undocumented.
1491 	 */
1492 	switch (tp->twistie) {
1493 	case 1:
1494 		if (RTL_R16 (CSCR) & CSCR_LinkOKBit) {
1495 			/* We have link beat, let us tune the twister. */
1496 			RTL_W16 (CSCR, CSCR_LinkDownOffCmd);
1497 			tp->twistie = 2;	/* Change to state 2. */
1498 			next_tick = HZ / 10;
1499 		} else {
1500 			/* Just put in some reasonable defaults for when beat returns. */
1501 			RTL_W16 (CSCR, CSCR_LinkDownCmd);
1502 			RTL_W32 (FIFOTMS, 0x20);	/* Turn on cable test mode. */
1503 			RTL_W32 (PARA78, PARA78_default);
1504 			RTL_W32 (PARA7c, PARA7c_default);
1505 			tp->twistie = 0;	/* Bail from future actions. */
1506 		}
1507 		break;
1508 	case 2:
1509 		/* Read how long it took to hear the echo. */
1510 		linkcase = RTL_R16 (CSCR) & CSCR_LinkStatusBits;
1511 		if (linkcase == 0x7000)
1512 			tp->twist_row = 3;
1513 		else if (linkcase == 0x3000)
1514 			tp->twist_row = 2;
1515 		else if (linkcase == 0x1000)
1516 			tp->twist_row = 1;
1517 		else
1518 			tp->twist_row = 0;
1519 		tp->twist_col = 0;
1520 		tp->twistie = 3;	/* Change to state 2. */
1521 		next_tick = HZ / 10;
1522 		break;
1523 	case 3:
1524 		/* Put out four tuning parameters, one per 100msec. */
1525 		if (tp->twist_col == 0)
1526 			RTL_W16 (FIFOTMS, 0);
1527 		RTL_W32 (PARA7c, param[(int) tp->twist_row]
1528 			 [(int) tp->twist_col]);
1529 		next_tick = HZ / 10;
1530 		if (++tp->twist_col >= 4) {
1531 			/* For short cables we are done.
1532 			   For long cables (row == 3) check for mistune. */
1533 			tp->twistie =
1534 			    (tp->twist_row == 3) ? 4 : 0;
1535 		}
1536 		break;
1537 	case 4:
1538 		/* Special case for long cables: check for mistune. */
1539 		if ((RTL_R16 (CSCR) &
1540 		     CSCR_LinkStatusBits) == 0x7000) {
1541 			tp->twistie = 0;
1542 			break;
1543 		} else {
1544 			RTL_W32 (PARA7c, 0xfb38de03);
1545 			tp->twistie = 5;
1546 			next_tick = HZ / 10;
1547 		}
1548 		break;
1549 	case 5:
1550 		/* Retune for shorter cable (column 2). */
1551 		RTL_W32 (FIFOTMS, 0x20);
1552 		RTL_W32 (PARA78, PARA78_default);
1553 		RTL_W32 (PARA7c, PARA7c_default);
1554 		RTL_W32 (FIFOTMS, 0x00);
1555 		tp->twist_row = 2;
1556 		tp->twist_col = 0;
1557 		tp->twistie = 3;
1558 		next_tick = HZ / 10;
1559 		break;
1560 
1561 	default:
1562 		/* do nothing */
1563 		break;
1564 	}
1565 }
1566 #endif /* CONFIG_8139TOO_TUNE_TWISTER */
1567 
rtl8139_thread_iter(struct net_device * dev,struct rtl8139_private * tp,void __iomem * ioaddr)1568 static inline void rtl8139_thread_iter (struct net_device *dev,
1569 				 struct rtl8139_private *tp,
1570 				 void __iomem *ioaddr)
1571 {
1572 	int mii_lpa;
1573 
1574 	mii_lpa = mdio_read (dev, tp->phys[0], MII_LPA);
1575 
1576 	if (!tp->mii.force_media && mii_lpa != 0xffff) {
1577 		int duplex = ((mii_lpa & LPA_100FULL) ||
1578 			      (mii_lpa & 0x01C0) == 0x0040);
1579 		if (tp->mii.full_duplex != duplex) {
1580 			tp->mii.full_duplex = duplex;
1581 
1582 			if (mii_lpa) {
1583 				netdev_info(dev, "Setting %s-duplex based on MII #%d link partner ability of %04x\n",
1584 					    tp->mii.full_duplex ? "full" : "half",
1585 					    tp->phys[0], mii_lpa);
1586 			} else {
1587 				netdev_info(dev, "media is unconnected, link down, or incompatible connection\n");
1588 			}
1589 #if 0
1590 			RTL_W8 (Cfg9346, Cfg9346_Unlock);
1591 			RTL_W8 (Config1, tp->mii.full_duplex ? 0x60 : 0x20);
1592 			RTL_W8 (Cfg9346, Cfg9346_Lock);
1593 #endif
1594 		}
1595 	}
1596 
1597 	next_tick = HZ * 60;
1598 
1599 	rtl8139_tune_twister (dev, tp);
1600 
1601 	netdev_dbg(dev, "Media selection tick, Link partner %04x\n",
1602 		   RTL_R16(NWayLPAR));
1603 	netdev_dbg(dev, "Other registers are IntMask %04x IntStatus %04x\n",
1604 		   RTL_R16(IntrMask), RTL_R16(IntrStatus));
1605 	netdev_dbg(dev, "Chip config %02x %02x\n",
1606 		   RTL_R8(Config0), RTL_R8(Config1));
1607 }
1608 
rtl8139_thread(struct work_struct * work)1609 static void rtl8139_thread (struct work_struct *work)
1610 {
1611 	struct rtl8139_private *tp =
1612 		container_of(work, struct rtl8139_private, thread.work);
1613 	struct net_device *dev = tp->mii.dev;
1614 	unsigned long thr_delay = next_tick;
1615 
1616 	rtnl_lock();
1617 
1618 	if (!netif_running(dev))
1619 		goto out_unlock;
1620 
1621 	if (tp->watchdog_fired) {
1622 		tp->watchdog_fired = 0;
1623 		rtl8139_tx_timeout_task(work);
1624 	} else
1625 		rtl8139_thread_iter(dev, tp, tp->mmio_addr);
1626 
1627 	if (tp->have_thread)
1628 		schedule_delayed_work(&tp->thread, thr_delay);
1629 out_unlock:
1630 	rtnl_unlock ();
1631 }
1632 
rtl8139_start_thread(struct rtl8139_private * tp)1633 static void rtl8139_start_thread(struct rtl8139_private *tp)
1634 {
1635 	tp->twistie = 0;
1636 	if (tp->chipset == CH_8139_K)
1637 		tp->twistie = 1;
1638 	else if (tp->drv_flags & HAS_LNK_CHNG)
1639 		return;
1640 
1641 	tp->have_thread = 1;
1642 	tp->watchdog_fired = 0;
1643 
1644 	schedule_delayed_work(&tp->thread, next_tick);
1645 }
1646 
rtl8139_tx_clear(struct rtl8139_private * tp)1647 static inline void rtl8139_tx_clear (struct rtl8139_private *tp)
1648 {
1649 	tp->cur_tx = 0;
1650 	tp->dirty_tx = 0;
1651 
1652 	/* XXX account for unsent Tx packets in tp->stats.tx_dropped */
1653 }
1654 
rtl8139_tx_timeout_task(struct work_struct * work)1655 static void rtl8139_tx_timeout_task (struct work_struct *work)
1656 {
1657 	struct rtl8139_private *tp =
1658 		container_of(work, struct rtl8139_private, thread.work);
1659 	struct net_device *dev = tp->mii.dev;
1660 	void __iomem *ioaddr = tp->mmio_addr;
1661 	int i;
1662 	u8 tmp8;
1663 
1664 	napi_disable(&tp->napi);
1665 	netif_stop_queue(dev);
1666 	synchronize_rcu();
1667 
1668 	netdev_dbg(dev, "Transmit timeout, status %02x %04x %04x media %02x\n",
1669 		   RTL_R8(ChipCmd), RTL_R16(IntrStatus),
1670 		   RTL_R16(IntrMask), RTL_R8(MediaStatus));
1671 	/* Emit info to figure out what went wrong. */
1672 	netdev_dbg(dev, "Tx queue start entry %ld  dirty entry %ld\n",
1673 		   tp->cur_tx, tp->dirty_tx);
1674 	for (i = 0; i < NUM_TX_DESC; i++)
1675 		netdev_dbg(dev, "Tx descriptor %d is %08x%s\n",
1676 			   i, RTL_R32(TxStatus0 + (i * 4)),
1677 			   i == tp->dirty_tx % NUM_TX_DESC ?
1678 			   " (queue head)" : "");
1679 
1680 	tp->xstats.tx_timeouts++;
1681 
1682 	/* disable Tx ASAP, if not already */
1683 	tmp8 = RTL_R8 (ChipCmd);
1684 	if (tmp8 & CmdTxEnb)
1685 		RTL_W8 (ChipCmd, CmdRxEnb);
1686 
1687 	spin_lock_bh(&tp->rx_lock);
1688 	/* Disable interrupts by clearing the interrupt mask. */
1689 	RTL_W16 (IntrMask, 0x0000);
1690 
1691 	/* Stop a shared interrupt from scavenging while we are. */
1692 	spin_lock_irq(&tp->lock);
1693 	rtl8139_tx_clear (tp);
1694 	spin_unlock_irq(&tp->lock);
1695 
1696 	/* ...and finally, reset everything */
1697 	napi_enable(&tp->napi);
1698 	rtl8139_hw_start(dev);
1699 	netif_wake_queue(dev);
1700 
1701 	spin_unlock_bh(&tp->rx_lock);
1702 }
1703 
rtl8139_tx_timeout(struct net_device * dev,unsigned int txqueue)1704 static void rtl8139_tx_timeout(struct net_device *dev, unsigned int txqueue)
1705 {
1706 	struct rtl8139_private *tp = netdev_priv(dev);
1707 
1708 	tp->watchdog_fired = 1;
1709 	if (!tp->have_thread) {
1710 		INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
1711 		schedule_delayed_work(&tp->thread, next_tick);
1712 	}
1713 }
1714 
rtl8139_start_xmit(struct sk_buff * skb,struct net_device * dev)1715 static netdev_tx_t rtl8139_start_xmit (struct sk_buff *skb,
1716 					     struct net_device *dev)
1717 {
1718 	struct rtl8139_private *tp = netdev_priv(dev);
1719 	void __iomem *ioaddr = tp->mmio_addr;
1720 	unsigned int entry;
1721 	unsigned int len = skb->len;
1722 	unsigned long flags;
1723 
1724 	/* Calculate the next Tx descriptor entry. */
1725 	entry = tp->cur_tx % NUM_TX_DESC;
1726 
1727 	/* Note: the chip doesn't have auto-pad! */
1728 	if (likely(len < TX_BUF_SIZE)) {
1729 		if (len < ETH_ZLEN)
1730 			memset(tp->tx_buf[entry], 0, ETH_ZLEN);
1731 		skb_copy_and_csum_dev(skb, tp->tx_buf[entry]);
1732 		dev_kfree_skb_any(skb);
1733 	} else {
1734 		dev_kfree_skb_any(skb);
1735 		dev->stats.tx_dropped++;
1736 		return NETDEV_TX_OK;
1737 	}
1738 
1739 	spin_lock_irqsave(&tp->lock, flags);
1740 	/*
1741 	 * Writing to TxStatus triggers a DMA transfer of the data
1742 	 * copied to tp->tx_buf[entry] above. Use a memory barrier
1743 	 * to make sure that the device sees the updated data.
1744 	 */
1745 	wmb();
1746 	RTL_W32_F (TxStatus0 + (entry * sizeof (u32)),
1747 		   tp->tx_flag | max(len, (unsigned int)ETH_ZLEN));
1748 
1749 	tp->cur_tx++;
1750 
1751 	if ((tp->cur_tx - NUM_TX_DESC) == tp->dirty_tx)
1752 		netif_stop_queue (dev);
1753 	spin_unlock_irqrestore(&tp->lock, flags);
1754 
1755 	netif_dbg(tp, tx_queued, dev, "Queued Tx packet size %u to slot %d\n",
1756 		  len, entry);
1757 
1758 	return NETDEV_TX_OK;
1759 }
1760 
1761 
rtl8139_tx_interrupt(struct net_device * dev,struct rtl8139_private * tp,void __iomem * ioaddr)1762 static void rtl8139_tx_interrupt (struct net_device *dev,
1763 				  struct rtl8139_private *tp,
1764 				  void __iomem *ioaddr)
1765 {
1766 	unsigned long dirty_tx, tx_left;
1767 
1768 	assert (dev != NULL);
1769 	assert (ioaddr != NULL);
1770 
1771 	dirty_tx = tp->dirty_tx;
1772 	tx_left = tp->cur_tx - dirty_tx;
1773 	while (tx_left > 0) {
1774 		int entry = dirty_tx % NUM_TX_DESC;
1775 		int txstatus;
1776 
1777 		txstatus = RTL_R32 (TxStatus0 + (entry * sizeof (u32)));
1778 
1779 		if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
1780 			break;	/* It still hasn't been Txed */
1781 
1782 		/* Note: TxCarrierLost is always asserted at 100mbps. */
1783 		if (txstatus & (TxOutOfWindow | TxAborted)) {
1784 			/* There was an major error, log it. */
1785 			netif_dbg(tp, tx_err, dev, "Transmit error, Tx status %08x\n",
1786 				  txstatus);
1787 			dev->stats.tx_errors++;
1788 			if (txstatus & TxAborted) {
1789 				dev->stats.tx_aborted_errors++;
1790 				RTL_W32 (TxConfig, TxClearAbt);
1791 				RTL_W16 (IntrStatus, TxErr);
1792 				wmb();
1793 			}
1794 			if (txstatus & TxCarrierLost)
1795 				dev->stats.tx_carrier_errors++;
1796 			if (txstatus & TxOutOfWindow)
1797 				dev->stats.tx_window_errors++;
1798 		} else {
1799 			if (txstatus & TxUnderrun) {
1800 				/* Add 64 to the Tx FIFO threshold. */
1801 				if (tp->tx_flag < 0x00300000)
1802 					tp->tx_flag += 0x00020000;
1803 				dev->stats.tx_fifo_errors++;
1804 			}
1805 			dev->stats.collisions += (txstatus >> 24) & 15;
1806 			u64_stats_update_begin(&tp->tx_stats.syncp);
1807 			tp->tx_stats.packets++;
1808 			tp->tx_stats.bytes += txstatus & 0x7ff;
1809 			u64_stats_update_end(&tp->tx_stats.syncp);
1810 		}
1811 
1812 		dirty_tx++;
1813 		tx_left--;
1814 	}
1815 
1816 #ifndef RTL8139_NDEBUG
1817 	if (tp->cur_tx - dirty_tx > NUM_TX_DESC) {
1818 		netdev_err(dev, "Out-of-sync dirty pointer, %ld vs. %ld\n",
1819 			   dirty_tx, tp->cur_tx);
1820 		dirty_tx += NUM_TX_DESC;
1821 	}
1822 #endif /* RTL8139_NDEBUG */
1823 
1824 	/* only wake the queue if we did work, and the queue is stopped */
1825 	if (tp->dirty_tx != dirty_tx) {
1826 		tp->dirty_tx = dirty_tx;
1827 		mb();
1828 		netif_wake_queue (dev);
1829 	}
1830 }
1831 
1832 
1833 /* TODO: clean this up!  Rx reset need not be this intensive */
rtl8139_rx_err(u32 rx_status,struct net_device * dev,struct rtl8139_private * tp,void __iomem * ioaddr)1834 static void rtl8139_rx_err (u32 rx_status, struct net_device *dev,
1835 			    struct rtl8139_private *tp, void __iomem *ioaddr)
1836 {
1837 	u8 tmp8;
1838 #ifdef CONFIG_8139_OLD_RX_RESET
1839 	int tmp_work;
1840 #endif
1841 
1842 	netif_dbg(tp, rx_err, dev, "Ethernet frame had errors, status %08x\n",
1843 		  rx_status);
1844 	dev->stats.rx_errors++;
1845 	if (!(rx_status & RxStatusOK)) {
1846 		if (rx_status & RxTooLong) {
1847 			netdev_dbg(dev, "Oversized Ethernet frame, status %04x!\n",
1848 				   rx_status);
1849 			/* A.C.: The chip hangs here. */
1850 		}
1851 		if (rx_status & (RxBadSymbol | RxBadAlign))
1852 			dev->stats.rx_frame_errors++;
1853 		if (rx_status & (RxRunt | RxTooLong))
1854 			dev->stats.rx_length_errors++;
1855 		if (rx_status & RxCRCErr)
1856 			dev->stats.rx_crc_errors++;
1857 	} else {
1858 		tp->xstats.rx_lost_in_ring++;
1859 	}
1860 
1861 #ifndef CONFIG_8139_OLD_RX_RESET
1862 	tmp8 = RTL_R8 (ChipCmd);
1863 	RTL_W8 (ChipCmd, tmp8 & ~CmdRxEnb);
1864 	RTL_W8 (ChipCmd, tmp8);
1865 	RTL_W32 (RxConfig, tp->rx_config);
1866 	tp->cur_rx = 0;
1867 #else
1868 	/* Reset the receiver, based on RealTek recommendation. (Bug?) */
1869 
1870 	/* disable receive */
1871 	RTL_W8_F (ChipCmd, CmdTxEnb);
1872 	tmp_work = 200;
1873 	while (--tmp_work > 0) {
1874 		udelay(1);
1875 		tmp8 = RTL_R8 (ChipCmd);
1876 		if (!(tmp8 & CmdRxEnb))
1877 			break;
1878 	}
1879 	if (tmp_work <= 0)
1880 		netdev_warn(dev, "rx stop wait too long\n");
1881 	/* restart receive */
1882 	tmp_work = 200;
1883 	while (--tmp_work > 0) {
1884 		RTL_W8_F (ChipCmd, CmdRxEnb | CmdTxEnb);
1885 		udelay(1);
1886 		tmp8 = RTL_R8 (ChipCmd);
1887 		if ((tmp8 & CmdRxEnb) && (tmp8 & CmdTxEnb))
1888 			break;
1889 	}
1890 	if (tmp_work <= 0)
1891 		netdev_warn(dev, "tx/rx enable wait too long\n");
1892 
1893 	/* and reinitialize all rx related registers */
1894 	RTL_W8_F (Cfg9346, Cfg9346_Unlock);
1895 	/* Must enable Tx/Rx before setting transfer thresholds! */
1896 	RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
1897 
1898 	tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
1899 	RTL_W32 (RxConfig, tp->rx_config);
1900 	tp->cur_rx = 0;
1901 
1902 	netdev_dbg(dev, "init buffer addresses\n");
1903 
1904 	/* Lock Config[01234] and BMCR register writes */
1905 	RTL_W8 (Cfg9346, Cfg9346_Lock);
1906 
1907 	/* init Rx ring buffer DMA address */
1908 	RTL_W32_F (RxBuf, tp->rx_ring_dma);
1909 
1910 	/* A.C.: Reset the multicast list. */
1911 	__set_rx_mode (dev);
1912 #endif
1913 }
1914 
1915 #if RX_BUF_IDX == 3
wrap_copy(struct sk_buff * skb,const unsigned char * ring,u32 offset,unsigned int size)1916 static inline void wrap_copy(struct sk_buff *skb, const unsigned char *ring,
1917 				 u32 offset, unsigned int size)
1918 {
1919 	u32 left = RX_BUF_LEN - offset;
1920 
1921 	if (size > left) {
1922 		skb_copy_to_linear_data(skb, ring + offset, left);
1923 		skb_copy_to_linear_data_offset(skb, left, ring, size - left);
1924 	} else
1925 		skb_copy_to_linear_data(skb, ring + offset, size);
1926 }
1927 #endif
1928 
rtl8139_isr_ack(struct rtl8139_private * tp)1929 static void rtl8139_isr_ack(struct rtl8139_private *tp)
1930 {
1931 	void __iomem *ioaddr = tp->mmio_addr;
1932 	u16 status;
1933 
1934 	status = RTL_R16 (IntrStatus) & RxAckBits;
1935 
1936 	/* Clear out errors and receive interrupts */
1937 	if (likely(status != 0)) {
1938 		if (unlikely(status & (RxFIFOOver | RxOverflow))) {
1939 			tp->dev->stats.rx_errors++;
1940 			if (status & RxFIFOOver)
1941 				tp->dev->stats.rx_fifo_errors++;
1942 		}
1943 		RTL_W16_F (IntrStatus, RxAckBits);
1944 	}
1945 }
1946 
rtl8139_rx(struct net_device * dev,struct rtl8139_private * tp,int budget)1947 static int rtl8139_rx(struct net_device *dev, struct rtl8139_private *tp,
1948 		      int budget)
1949 {
1950 	void __iomem *ioaddr = tp->mmio_addr;
1951 	int received = 0;
1952 	unsigned char *rx_ring = tp->rx_ring;
1953 	unsigned int cur_rx = tp->cur_rx;
1954 	unsigned int rx_size = 0;
1955 
1956 	netdev_dbg(dev, "In %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n",
1957 		   __func__, (u16)cur_rx,
1958 		   RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
1959 
1960 	while (netif_running(dev) && received < budget &&
1961 	       (RTL_R8 (ChipCmd) & RxBufEmpty) == 0) {
1962 		u32 ring_offset = cur_rx % RX_BUF_LEN;
1963 		u32 rx_status;
1964 		unsigned int pkt_size;
1965 		struct sk_buff *skb;
1966 
1967 		rmb();
1968 
1969 		/* read size+status of next frame from DMA ring buffer */
1970 		rx_status = le32_to_cpu (*(__le32 *) (rx_ring + ring_offset));
1971 		rx_size = rx_status >> 16;
1972 		if (likely(!(dev->features & NETIF_F_RXFCS)))
1973 			pkt_size = rx_size - 4;
1974 		else
1975 			pkt_size = rx_size;
1976 
1977 		netif_dbg(tp, rx_status, dev, "%s() status %04x, size %04x, cur %04x\n",
1978 			  __func__, rx_status, rx_size, cur_rx);
1979 #if RTL8139_DEBUG > 2
1980 		print_hex_dump(KERN_DEBUG, "Frame contents: ",
1981 			       DUMP_PREFIX_OFFSET, 16, 1,
1982 			       &rx_ring[ring_offset], 70, true);
1983 #endif
1984 
1985 		/* Packet copy from FIFO still in progress.
1986 		 * Theoretically, this should never happen
1987 		 * since EarlyRx is disabled.
1988 		 */
1989 		if (unlikely(rx_size == 0xfff0)) {
1990 			if (!tp->fifo_copy_timeout)
1991 				tp->fifo_copy_timeout = jiffies + 2;
1992 			else if (time_after(jiffies, tp->fifo_copy_timeout)) {
1993 				netdev_dbg(dev, "hung FIFO. Reset\n");
1994 				rx_size = 0;
1995 				goto no_early_rx;
1996 			}
1997 			netif_dbg(tp, intr, dev, "fifo copy in progress\n");
1998 			tp->xstats.early_rx++;
1999 			break;
2000 		}
2001 
2002 no_early_rx:
2003 		tp->fifo_copy_timeout = 0;
2004 
2005 		/* If Rx err or invalid rx_size/rx_status received
2006 		 * (which happens if we get lost in the ring),
2007 		 * Rx process gets reset, so we abort any further
2008 		 * Rx processing.
2009 		 */
2010 		if (unlikely((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
2011 			     (rx_size < 8) ||
2012 			     (!(rx_status & RxStatusOK)))) {
2013 			if ((dev->features & NETIF_F_RXALL) &&
2014 			    (rx_size <= (MAX_ETH_FRAME_SIZE + 4)) &&
2015 			    (rx_size >= 8) &&
2016 			    (!(rx_status & RxStatusOK))) {
2017 				/* Length is at least mostly OK, but pkt has
2018 				 * error.  I'm hoping we can handle some of these
2019 				 * errors without resetting the chip. --Ben
2020 				 */
2021 				dev->stats.rx_errors++;
2022 				if (rx_status & RxCRCErr) {
2023 					dev->stats.rx_crc_errors++;
2024 					goto keep_pkt;
2025 				}
2026 				if (rx_status & RxRunt) {
2027 					dev->stats.rx_length_errors++;
2028 					goto keep_pkt;
2029 				}
2030 			}
2031 			rtl8139_rx_err (rx_status, dev, tp, ioaddr);
2032 			received = -1;
2033 			goto out;
2034 		}
2035 
2036 keep_pkt:
2037 		/* Malloc up new buffer, compatible with net-2e. */
2038 		/* Omit the four octet CRC from the length. */
2039 
2040 		skb = napi_alloc_skb(&tp->napi, pkt_size);
2041 		if (likely(skb)) {
2042 #if RX_BUF_IDX == 3
2043 			wrap_copy(skb, rx_ring, ring_offset+4, pkt_size);
2044 #else
2045 			skb_copy_to_linear_data (skb, &rx_ring[ring_offset + 4], pkt_size);
2046 #endif
2047 			skb_put (skb, pkt_size);
2048 
2049 			skb->protocol = eth_type_trans (skb, dev);
2050 
2051 			u64_stats_update_begin(&tp->rx_stats.syncp);
2052 			tp->rx_stats.packets++;
2053 			tp->rx_stats.bytes += pkt_size;
2054 			u64_stats_update_end(&tp->rx_stats.syncp);
2055 
2056 			netif_receive_skb (skb);
2057 		} else {
2058 			dev->stats.rx_dropped++;
2059 		}
2060 		received++;
2061 
2062 		cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
2063 		RTL_W16 (RxBufPtr, (u16) (cur_rx - 16));
2064 
2065 		rtl8139_isr_ack(tp);
2066 	}
2067 
2068 	if (unlikely(!received || rx_size == 0xfff0))
2069 		rtl8139_isr_ack(tp);
2070 
2071 	netdev_dbg(dev, "Done %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n",
2072 		   __func__, cur_rx,
2073 		   RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
2074 
2075 	tp->cur_rx = cur_rx;
2076 
2077 	/*
2078 	 * The receive buffer should be mostly empty.
2079 	 * Tell NAPI to reenable the Rx irq.
2080 	 */
2081 	if (tp->fifo_copy_timeout)
2082 		received = budget;
2083 
2084 out:
2085 	return received;
2086 }
2087 
2088 
rtl8139_weird_interrupt(struct net_device * dev,struct rtl8139_private * tp,void __iomem * ioaddr,int status,int link_changed)2089 static void rtl8139_weird_interrupt (struct net_device *dev,
2090 				     struct rtl8139_private *tp,
2091 				     void __iomem *ioaddr,
2092 				     int status, int link_changed)
2093 {
2094 	netdev_dbg(dev, "Abnormal interrupt, status %08x\n", status);
2095 
2096 	assert (dev != NULL);
2097 	assert (tp != NULL);
2098 	assert (ioaddr != NULL);
2099 
2100 	/* Update the error count. */
2101 	dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2102 	RTL_W32 (RxMissed, 0);
2103 
2104 	if ((status & RxUnderrun) && link_changed &&
2105 	    (tp->drv_flags & HAS_LNK_CHNG)) {
2106 		rtl_check_media(dev, 0);
2107 		status &= ~RxUnderrun;
2108 	}
2109 
2110 	if (status & (RxUnderrun | RxErr))
2111 		dev->stats.rx_errors++;
2112 
2113 	if (status & PCSTimeout)
2114 		dev->stats.rx_length_errors++;
2115 	if (status & RxUnderrun)
2116 		dev->stats.rx_fifo_errors++;
2117 	if (status & PCIErr) {
2118 		u16 pci_cmd_status;
2119 		pci_read_config_word (tp->pci_dev, PCI_STATUS, &pci_cmd_status);
2120 		pci_write_config_word (tp->pci_dev, PCI_STATUS, pci_cmd_status);
2121 
2122 		netdev_err(dev, "PCI Bus error %04x\n", pci_cmd_status);
2123 	}
2124 }
2125 
rtl8139_poll(struct napi_struct * napi,int budget)2126 static int rtl8139_poll(struct napi_struct *napi, int budget)
2127 {
2128 	struct rtl8139_private *tp = container_of(napi, struct rtl8139_private, napi);
2129 	struct net_device *dev = tp->dev;
2130 	void __iomem *ioaddr = tp->mmio_addr;
2131 	int work_done;
2132 
2133 	spin_lock(&tp->rx_lock);
2134 	work_done = 0;
2135 	if (likely(RTL_R16(IntrStatus) & RxAckBits))
2136 		work_done += rtl8139_rx(dev, tp, budget);
2137 
2138 	if (work_done < budget) {
2139 		unsigned long flags;
2140 
2141 		spin_lock_irqsave(&tp->lock, flags);
2142 		if (napi_complete_done(napi, work_done))
2143 			RTL_W16_F(IntrMask, rtl8139_intr_mask);
2144 		spin_unlock_irqrestore(&tp->lock, flags);
2145 	}
2146 	spin_unlock(&tp->rx_lock);
2147 
2148 	return work_done;
2149 }
2150 
2151 /* The interrupt handler does all of the Rx thread work and cleans up
2152    after the Tx thread. */
rtl8139_interrupt(int irq,void * dev_instance)2153 static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance)
2154 {
2155 	struct net_device *dev = (struct net_device *) dev_instance;
2156 	struct rtl8139_private *tp = netdev_priv(dev);
2157 	void __iomem *ioaddr = tp->mmio_addr;
2158 	u16 status, ackstat;
2159 	int link_changed = 0; /* avoid bogus "uninit" warning */
2160 	int handled = 0;
2161 
2162 	spin_lock (&tp->lock);
2163 	status = RTL_R16 (IntrStatus);
2164 
2165 	/* shared irq? */
2166 	if (unlikely((status & rtl8139_intr_mask) == 0))
2167 		goto out;
2168 
2169 	handled = 1;
2170 
2171 	/* h/w no longer present (hotplug?) or major error, bail */
2172 	if (unlikely(status == 0xFFFF))
2173 		goto out;
2174 
2175 	/* close possible race's with dev_close */
2176 	if (unlikely(!netif_running(dev))) {
2177 		RTL_W16 (IntrMask, 0);
2178 		goto out;
2179 	}
2180 
2181 	/* Acknowledge all of the current interrupt sources ASAP, but
2182 	   an first get an additional status bit from CSCR. */
2183 	if (unlikely(status & RxUnderrun))
2184 		link_changed = RTL_R16 (CSCR) & CSCR_LinkChangeBit;
2185 
2186 	ackstat = status & ~(RxAckBits | TxErr);
2187 	if (ackstat)
2188 		RTL_W16 (IntrStatus, ackstat);
2189 
2190 	/* Receive packets are processed by poll routine.
2191 	   If not running start it now. */
2192 	if (status & RxAckBits){
2193 		if (napi_schedule_prep(&tp->napi)) {
2194 			RTL_W16_F (IntrMask, rtl8139_norx_intr_mask);
2195 			__napi_schedule(&tp->napi);
2196 		}
2197 	}
2198 
2199 	/* Check uncommon events with one test. */
2200 	if (unlikely(status & (PCIErr | PCSTimeout | RxUnderrun | RxErr)))
2201 		rtl8139_weird_interrupt (dev, tp, ioaddr,
2202 					 status, link_changed);
2203 
2204 	if (status & (TxOK | TxErr)) {
2205 		rtl8139_tx_interrupt (dev, tp, ioaddr);
2206 		if (status & TxErr)
2207 			RTL_W16 (IntrStatus, TxErr);
2208 	}
2209  out:
2210 	spin_unlock (&tp->lock);
2211 
2212 	netdev_dbg(dev, "exiting interrupt, intr_status=%#4.4x\n",
2213 		   RTL_R16(IntrStatus));
2214 	return IRQ_RETVAL(handled);
2215 }
2216 
2217 #ifdef CONFIG_NET_POLL_CONTROLLER
2218 /*
2219  * Polling receive - used by netconsole and other diagnostic tools
2220  * to allow network i/o with interrupts disabled.
2221  */
rtl8139_poll_controller(struct net_device * dev)2222 static void rtl8139_poll_controller(struct net_device *dev)
2223 {
2224 	struct rtl8139_private *tp = netdev_priv(dev);
2225 	const int irq = tp->pci_dev->irq;
2226 
2227 	disable_irq_nosync(irq);
2228 	rtl8139_interrupt(irq, dev);
2229 	enable_irq(irq);
2230 }
2231 #endif
2232 
rtl8139_set_mac_address(struct net_device * dev,void * p)2233 static int rtl8139_set_mac_address(struct net_device *dev, void *p)
2234 {
2235 	struct rtl8139_private *tp = netdev_priv(dev);
2236 	void __iomem *ioaddr = tp->mmio_addr;
2237 	struct sockaddr *addr = p;
2238 
2239 	if (!is_valid_ether_addr(addr->sa_data))
2240 		return -EADDRNOTAVAIL;
2241 
2242 	eth_hw_addr_set(dev, addr->sa_data);
2243 
2244 	spin_lock_irq(&tp->lock);
2245 
2246 	RTL_W8_F(Cfg9346, Cfg9346_Unlock);
2247 	RTL_W32_F(MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
2248 	RTL_W32_F(MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
2249 	RTL_W8_F(Cfg9346, Cfg9346_Lock);
2250 
2251 	spin_unlock_irq(&tp->lock);
2252 
2253 	return 0;
2254 }
2255 
rtl8139_close(struct net_device * dev)2256 static int rtl8139_close (struct net_device *dev)
2257 {
2258 	struct rtl8139_private *tp = netdev_priv(dev);
2259 	void __iomem *ioaddr = tp->mmio_addr;
2260 	unsigned long flags;
2261 
2262 	netif_stop_queue(dev);
2263 	napi_disable(&tp->napi);
2264 
2265 	netif_dbg(tp, ifdown, dev, "Shutting down ethercard, status was 0x%04x\n",
2266 		  RTL_R16(IntrStatus));
2267 
2268 	spin_lock_irqsave (&tp->lock, flags);
2269 
2270 	/* Stop the chip's Tx and Rx DMA processes. */
2271 	RTL_W8 (ChipCmd, 0);
2272 
2273 	/* Disable interrupts by clearing the interrupt mask. */
2274 	RTL_W16 (IntrMask, 0);
2275 
2276 	/* Update the error counts. */
2277 	dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2278 	RTL_W32 (RxMissed, 0);
2279 
2280 	spin_unlock_irqrestore (&tp->lock, flags);
2281 
2282 	free_irq(tp->pci_dev->irq, dev);
2283 
2284 	rtl8139_tx_clear (tp);
2285 
2286 	dma_free_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
2287 			  tp->rx_ring, tp->rx_ring_dma);
2288 	dma_free_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
2289 			  tp->tx_bufs, tp->tx_bufs_dma);
2290 	tp->rx_ring = NULL;
2291 	tp->tx_bufs = NULL;
2292 
2293 	/* Green! Put the chip in low-power mode. */
2294 	RTL_W8 (Cfg9346, Cfg9346_Unlock);
2295 
2296 	if (rtl_chip_info[tp->chipset].flags & HasHltClk)
2297 		RTL_W8 (HltClk, 'H');	/* 'R' would leave the clock running. */
2298 
2299 	return 0;
2300 }
2301 
2302 
2303 /* Get the ethtool Wake-on-LAN settings.  Assumes that wol points to
2304    kernel memory, *wol has been initialized as {ETHTOOL_GWOL}, and
2305    other threads or interrupts aren't messing with the 8139.  */
rtl8139_get_wol(struct net_device * dev,struct ethtool_wolinfo * wol)2306 static void rtl8139_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2307 {
2308 	struct rtl8139_private *tp = netdev_priv(dev);
2309 	void __iomem *ioaddr = tp->mmio_addr;
2310 
2311 	spin_lock_irq(&tp->lock);
2312 	if (rtl_chip_info[tp->chipset].flags & HasLWake) {
2313 		u8 cfg3 = RTL_R8 (Config3);
2314 		u8 cfg5 = RTL_R8 (Config5);
2315 
2316 		wol->supported = WAKE_PHY | WAKE_MAGIC
2317 			| WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
2318 
2319 		wol->wolopts = 0;
2320 		if (cfg3 & Cfg3_LinkUp)
2321 			wol->wolopts |= WAKE_PHY;
2322 		if (cfg3 & Cfg3_Magic)
2323 			wol->wolopts |= WAKE_MAGIC;
2324 		/* (KON)FIXME: See how netdev_set_wol() handles the
2325 		   following constants.  */
2326 		if (cfg5 & Cfg5_UWF)
2327 			wol->wolopts |= WAKE_UCAST;
2328 		if (cfg5 & Cfg5_MWF)
2329 			wol->wolopts |= WAKE_MCAST;
2330 		if (cfg5 & Cfg5_BWF)
2331 			wol->wolopts |= WAKE_BCAST;
2332 	}
2333 	spin_unlock_irq(&tp->lock);
2334 }
2335 
2336 
2337 /* Set the ethtool Wake-on-LAN settings.  Return 0 or -errno.  Assumes
2338    that wol points to kernel memory and other threads or interrupts
2339    aren't messing with the 8139.  */
rtl8139_set_wol(struct net_device * dev,struct ethtool_wolinfo * wol)2340 static int rtl8139_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2341 {
2342 	struct rtl8139_private *tp = netdev_priv(dev);
2343 	void __iomem *ioaddr = tp->mmio_addr;
2344 	u32 support;
2345 	u8 cfg3, cfg5;
2346 
2347 	support = ((rtl_chip_info[tp->chipset].flags & HasLWake)
2348 		   ? (WAKE_PHY | WAKE_MAGIC
2349 		      | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST)
2350 		   : 0);
2351 	if (wol->wolopts & ~support)
2352 		return -EINVAL;
2353 
2354 	spin_lock_irq(&tp->lock);
2355 	cfg3 = RTL_R8 (Config3) & ~(Cfg3_LinkUp | Cfg3_Magic);
2356 	if (wol->wolopts & WAKE_PHY)
2357 		cfg3 |= Cfg3_LinkUp;
2358 	if (wol->wolopts & WAKE_MAGIC)
2359 		cfg3 |= Cfg3_Magic;
2360 	RTL_W8 (Cfg9346, Cfg9346_Unlock);
2361 	RTL_W8 (Config3, cfg3);
2362 	RTL_W8 (Cfg9346, Cfg9346_Lock);
2363 
2364 	cfg5 = RTL_R8 (Config5) & ~(Cfg5_UWF | Cfg5_MWF | Cfg5_BWF);
2365 	/* (KON)FIXME: These are untested.  We may have to set the
2366 	   CRC0, Wakeup0 and LSBCRC0 registers too, but I have no
2367 	   documentation.  */
2368 	if (wol->wolopts & WAKE_UCAST)
2369 		cfg5 |= Cfg5_UWF;
2370 	if (wol->wolopts & WAKE_MCAST)
2371 		cfg5 |= Cfg5_MWF;
2372 	if (wol->wolopts & WAKE_BCAST)
2373 		cfg5 |= Cfg5_BWF;
2374 	RTL_W8 (Config5, cfg5);	/* need not unlock via Cfg9346 */
2375 	spin_unlock_irq(&tp->lock);
2376 
2377 	return 0;
2378 }
2379 
rtl8139_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)2380 static void rtl8139_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2381 {
2382 	struct rtl8139_private *tp = netdev_priv(dev);
2383 	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
2384 	strlcpy(info->version, DRV_VERSION, sizeof(info->version));
2385 	strlcpy(info->bus_info, pci_name(tp->pci_dev), sizeof(info->bus_info));
2386 }
2387 
rtl8139_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * cmd)2388 static int rtl8139_get_link_ksettings(struct net_device *dev,
2389 				      struct ethtool_link_ksettings *cmd)
2390 {
2391 	struct rtl8139_private *tp = netdev_priv(dev);
2392 	spin_lock_irq(&tp->lock);
2393 	mii_ethtool_get_link_ksettings(&tp->mii, cmd);
2394 	spin_unlock_irq(&tp->lock);
2395 	return 0;
2396 }
2397 
rtl8139_set_link_ksettings(struct net_device * dev,const struct ethtool_link_ksettings * cmd)2398 static int rtl8139_set_link_ksettings(struct net_device *dev,
2399 				      const struct ethtool_link_ksettings *cmd)
2400 {
2401 	struct rtl8139_private *tp = netdev_priv(dev);
2402 	int rc;
2403 	spin_lock_irq(&tp->lock);
2404 	rc = mii_ethtool_set_link_ksettings(&tp->mii, cmd);
2405 	spin_unlock_irq(&tp->lock);
2406 	return rc;
2407 }
2408 
rtl8139_nway_reset(struct net_device * dev)2409 static int rtl8139_nway_reset(struct net_device *dev)
2410 {
2411 	struct rtl8139_private *tp = netdev_priv(dev);
2412 	return mii_nway_restart(&tp->mii);
2413 }
2414 
rtl8139_get_link(struct net_device * dev)2415 static u32 rtl8139_get_link(struct net_device *dev)
2416 {
2417 	struct rtl8139_private *tp = netdev_priv(dev);
2418 	return mii_link_ok(&tp->mii);
2419 }
2420 
rtl8139_get_msglevel(struct net_device * dev)2421 static u32 rtl8139_get_msglevel(struct net_device *dev)
2422 {
2423 	struct rtl8139_private *tp = netdev_priv(dev);
2424 	return tp->msg_enable;
2425 }
2426 
rtl8139_set_msglevel(struct net_device * dev,u32 datum)2427 static void rtl8139_set_msglevel(struct net_device *dev, u32 datum)
2428 {
2429 	struct rtl8139_private *tp = netdev_priv(dev);
2430 	tp->msg_enable = datum;
2431 }
2432 
rtl8139_get_regs_len(struct net_device * dev)2433 static int rtl8139_get_regs_len(struct net_device *dev)
2434 {
2435 	struct rtl8139_private *tp;
2436 	/* TODO: we are too slack to do reg dumping for pio, for now */
2437 	if (use_io)
2438 		return 0;
2439 	tp = netdev_priv(dev);
2440 	return tp->regs_len;
2441 }
2442 
rtl8139_get_regs(struct net_device * dev,struct ethtool_regs * regs,void * regbuf)2443 static void rtl8139_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
2444 {
2445 	struct rtl8139_private *tp;
2446 
2447 	/* TODO: we are too slack to do reg dumping for pio, for now */
2448 	if (use_io)
2449 		return;
2450 	tp = netdev_priv(dev);
2451 
2452 	regs->version = RTL_REGS_VER;
2453 
2454 	spin_lock_irq(&tp->lock);
2455 	memcpy_fromio(regbuf, tp->mmio_addr, regs->len);
2456 	spin_unlock_irq(&tp->lock);
2457 }
2458 
rtl8139_get_sset_count(struct net_device * dev,int sset)2459 static int rtl8139_get_sset_count(struct net_device *dev, int sset)
2460 {
2461 	switch (sset) {
2462 	case ETH_SS_STATS:
2463 		return RTL_NUM_STATS;
2464 	default:
2465 		return -EOPNOTSUPP;
2466 	}
2467 }
2468 
rtl8139_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)2469 static void rtl8139_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2470 {
2471 	struct rtl8139_private *tp = netdev_priv(dev);
2472 
2473 	data[0] = tp->xstats.early_rx;
2474 	data[1] = tp->xstats.tx_buf_mapped;
2475 	data[2] = tp->xstats.tx_timeouts;
2476 	data[3] = tp->xstats.rx_lost_in_ring;
2477 }
2478 
rtl8139_get_strings(struct net_device * dev,u32 stringset,u8 * data)2479 static void rtl8139_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2480 {
2481 	memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2482 }
2483 
2484 static const struct ethtool_ops rtl8139_ethtool_ops = {
2485 	.get_drvinfo		= rtl8139_get_drvinfo,
2486 	.get_regs_len		= rtl8139_get_regs_len,
2487 	.get_regs		= rtl8139_get_regs,
2488 	.nway_reset		= rtl8139_nway_reset,
2489 	.get_link		= rtl8139_get_link,
2490 	.get_msglevel		= rtl8139_get_msglevel,
2491 	.set_msglevel		= rtl8139_set_msglevel,
2492 	.get_wol		= rtl8139_get_wol,
2493 	.set_wol		= rtl8139_set_wol,
2494 	.get_strings		= rtl8139_get_strings,
2495 	.get_sset_count		= rtl8139_get_sset_count,
2496 	.get_ethtool_stats	= rtl8139_get_ethtool_stats,
2497 	.get_link_ksettings	= rtl8139_get_link_ksettings,
2498 	.set_link_ksettings	= rtl8139_set_link_ksettings,
2499 };
2500 
netdev_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)2501 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2502 {
2503 	struct rtl8139_private *tp = netdev_priv(dev);
2504 	int rc;
2505 
2506 	if (!netif_running(dev))
2507 		return -EINVAL;
2508 
2509 	spin_lock_irq(&tp->lock);
2510 	rc = generic_mii_ioctl(&tp->mii, if_mii(rq), cmd, NULL);
2511 	spin_unlock_irq(&tp->lock);
2512 
2513 	return rc;
2514 }
2515 
2516 
2517 static void
rtl8139_get_stats64(struct net_device * dev,struct rtnl_link_stats64 * stats)2518 rtl8139_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
2519 {
2520 	struct rtl8139_private *tp = netdev_priv(dev);
2521 	void __iomem *ioaddr = tp->mmio_addr;
2522 	unsigned long flags;
2523 	unsigned int start;
2524 
2525 	if (netif_running(dev)) {
2526 		spin_lock_irqsave (&tp->lock, flags);
2527 		dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2528 		RTL_W32 (RxMissed, 0);
2529 		spin_unlock_irqrestore (&tp->lock, flags);
2530 	}
2531 
2532 	netdev_stats_to_stats64(stats, &dev->stats);
2533 
2534 	do {
2535 		start = u64_stats_fetch_begin_irq(&tp->rx_stats.syncp);
2536 		stats->rx_packets = tp->rx_stats.packets;
2537 		stats->rx_bytes = tp->rx_stats.bytes;
2538 	} while (u64_stats_fetch_retry_irq(&tp->rx_stats.syncp, start));
2539 
2540 	do {
2541 		start = u64_stats_fetch_begin_irq(&tp->tx_stats.syncp);
2542 		stats->tx_packets = tp->tx_stats.packets;
2543 		stats->tx_bytes = tp->tx_stats.bytes;
2544 	} while (u64_stats_fetch_retry_irq(&tp->tx_stats.syncp, start));
2545 }
2546 
2547 /* Set or clear the multicast filter for this adaptor.
2548    This routine is not state sensitive and need not be SMP locked. */
2549 
__set_rx_mode(struct net_device * dev)2550 static void __set_rx_mode (struct net_device *dev)
2551 {
2552 	struct rtl8139_private *tp = netdev_priv(dev);
2553 	void __iomem *ioaddr = tp->mmio_addr;
2554 	u32 mc_filter[2];	/* Multicast hash filter */
2555 	int rx_mode;
2556 	u32 tmp;
2557 
2558 	netdev_dbg(dev, "rtl8139_set_rx_mode(%04x) done -- Rx config %08x\n",
2559 		   dev->flags, RTL_R32(RxConfig));
2560 
2561 	/* Note: do not reorder, GCC is clever about common statements. */
2562 	if (dev->flags & IFF_PROMISC) {
2563 		rx_mode =
2564 		    AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
2565 		    AcceptAllPhys;
2566 		mc_filter[1] = mc_filter[0] = 0xffffffff;
2567 	} else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
2568 		   (dev->flags & IFF_ALLMULTI)) {
2569 		/* Too many to filter perfectly -- accept all multicasts. */
2570 		rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
2571 		mc_filter[1] = mc_filter[0] = 0xffffffff;
2572 	} else {
2573 		struct netdev_hw_addr *ha;
2574 		rx_mode = AcceptBroadcast | AcceptMyPhys;
2575 		mc_filter[1] = mc_filter[0] = 0;
2576 		netdev_for_each_mc_addr(ha, dev) {
2577 			int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
2578 
2579 			mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
2580 			rx_mode |= AcceptMulticast;
2581 		}
2582 	}
2583 
2584 	if (dev->features & NETIF_F_RXALL)
2585 		rx_mode |= (AcceptErr | AcceptRunt);
2586 
2587 	/* We can safely update without stopping the chip. */
2588 	tmp = rtl8139_rx_config | rx_mode;
2589 	if (tp->rx_config != tmp) {
2590 		RTL_W32_F (RxConfig, tmp);
2591 		tp->rx_config = tmp;
2592 	}
2593 	RTL_W32_F (MAR0 + 0, mc_filter[0]);
2594 	RTL_W32_F (MAR0 + 4, mc_filter[1]);
2595 }
2596 
rtl8139_set_rx_mode(struct net_device * dev)2597 static void rtl8139_set_rx_mode (struct net_device *dev)
2598 {
2599 	unsigned long flags;
2600 	struct rtl8139_private *tp = netdev_priv(dev);
2601 
2602 	spin_lock_irqsave (&tp->lock, flags);
2603 	__set_rx_mode(dev);
2604 	spin_unlock_irqrestore (&tp->lock, flags);
2605 }
2606 
rtl8139_suspend(struct device * device)2607 static int __maybe_unused rtl8139_suspend(struct device *device)
2608 {
2609 	struct net_device *dev = dev_get_drvdata(device);
2610 	struct rtl8139_private *tp = netdev_priv(dev);
2611 	void __iomem *ioaddr = tp->mmio_addr;
2612 	unsigned long flags;
2613 
2614 	if (!netif_running (dev))
2615 		return 0;
2616 
2617 	netif_device_detach (dev);
2618 
2619 	spin_lock_irqsave (&tp->lock, flags);
2620 
2621 	/* Disable interrupts, stop Tx and Rx. */
2622 	RTL_W16 (IntrMask, 0);
2623 	RTL_W8 (ChipCmd, 0);
2624 
2625 	/* Update the error counts. */
2626 	dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
2627 	RTL_W32 (RxMissed, 0);
2628 
2629 	spin_unlock_irqrestore (&tp->lock, flags);
2630 
2631 	return 0;
2632 }
2633 
rtl8139_resume(struct device * device)2634 static int __maybe_unused rtl8139_resume(struct device *device)
2635 {
2636 	struct net_device *dev = dev_get_drvdata(device);
2637 
2638 	if (!netif_running (dev))
2639 		return 0;
2640 
2641 	rtl8139_init_ring (dev);
2642 	rtl8139_hw_start (dev);
2643 	netif_device_attach (dev);
2644 	return 0;
2645 }
2646 
2647 static SIMPLE_DEV_PM_OPS(rtl8139_pm_ops, rtl8139_suspend, rtl8139_resume);
2648 
2649 static struct pci_driver rtl8139_pci_driver = {
2650 	.name		= DRV_NAME,
2651 	.id_table	= rtl8139_pci_tbl,
2652 	.probe		= rtl8139_init_one,
2653 	.remove		= rtl8139_remove_one,
2654 	.driver.pm	= &rtl8139_pm_ops,
2655 };
2656 
2657 
rtl8139_init_module(void)2658 static int __init rtl8139_init_module (void)
2659 {
2660 	/* when we're a module, we always print a version message,
2661 	 * even if no 8139 board is found.
2662 	 */
2663 #ifdef MODULE
2664 	pr_info(RTL8139_DRIVER_NAME "\n");
2665 #endif
2666 
2667 	return pci_register_driver(&rtl8139_pci_driver);
2668 }
2669 
2670 
rtl8139_cleanup_module(void)2671 static void __exit rtl8139_cleanup_module (void)
2672 {
2673 	pci_unregister_driver (&rtl8139_pci_driver);
2674 }
2675 
2676 
2677 module_init(rtl8139_init_module);
2678 module_exit(rtl8139_cleanup_module);
2679