aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/tulip/tulip.h
blob: 3f69f53d7768f44e90385ce43dd9a22830ac7a97 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
/*
	drivers/net/tulip/tulip.h

	Copyright 2000,2001  The Linux Kernel Team
	Written/copyright 1994-2001 by Donald Becker.

	This software may be used and distributed according to the terms
	of the GNU General Public License, incorporated herein by reference.

	Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
	for more information on this driver, or visit the project
	Web page at http://sourceforge.net/projects/tulip/

*/

#ifndef __NET_TULIP_H__
#define __NET_TULIP_H__

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <asm/io.h>
#include <asm/irq.h>



/* undefine, or define to various debugging levels (>4 == obscene levels) */
#define TULIP_DEBUG 1

#ifdef CONFIG_TULIP_MMIO
#define TULIP_BAR	1	/* CBMA */
#else
#define TULIP_BAR	0	/* CBIO */
#endif



struct tulip_chip_table {
	char *chip_name;
	int io_size;
	int valid_intrs;	/* CSR7 interrupt enable settings */
	int flags;
	void (*media_timer) (unsigned long);
	work_func_t media_task;
};


enum tbl_flag {
	HAS_MII			= 0x0001,
	HAS_MEDIA_TABLE		= 0x0002,
	CSR12_IN_SROM		= 0x0004,
	ALWAYS_CHECK_MII	= 0x0008,
	HAS_ACPI		= 0x0010,
	MC_HASH_ONLY		= 0x0020, /* Hash-only multicast filter. */
	HAS_PNICNWAY		= 0x0080,
	HAS_NWAY		= 0x0040, /* Uses internal NWay xcvr. */
	HAS_INTR_MITIGATION	= 0x0100,
	IS_ASIX			= 0x0200,
	HAS_8023X		= 0x0400,
	COMET_MAC_ADDR		= 0x0800,
	HAS_PCI_MWI		= 0x1000,
	HAS_PHY_IRQ		= 0x2000,
	HAS_SWAPPED_SEEPROM	= 0x4000,
	NEEDS_FAKE_MEDIA_TABLE	= 0x8000,
};


/* chip types.  careful!  order is VERY IMPORTANT here, as these
 * are used throughout the driver as indices into arrays */
/* Note 21142 == 21143. */
enum chips {
	DC21040 = 0,
	DC21041 = 1,
	DC21140 = 2,
	DC21142 = 3, DC21143 = 3,
	LC82C168,
	MX98713,
	MX98715,
	MX98725,
	AX88140,
	PNIC2,
	COMET,
	COMPEX9881,
	I21145,
	DM910X,
	CONEXANT,
};


enum MediaIs {
	MediaIsFD = 1,
	MediaAlwaysFD = 2,
	MediaIsMII = 4,
	MediaIsFx = 8,
	MediaIs100 = 16
};


/* Offsets to the Command and Status Registers, "CSRs".  All accesses
   must be longword instructions and quadword aligned. */
enum tulip_offsets {
	CSR0 = 0,
	CSR1 = 0x08,
	CSR2 = 0x10,
	CSR3 = 0x18,
	CSR4 = 0x20,
	CSR5 = 0x28,
	CSR6 = 0x30,
	CSR7 = 0x38,
	CSR8 = 0x40,
	CSR9 = 0x48,
	CSR10 = 0x50,
	CSR11 = 0x58,
	CSR12 = 0x60,
	CSR13 = 0x68,
	CSR14 = 0x70,
	CSR15 = 0x78,
};

/* register offset and bits for CFDD PCI config reg */
enum pci_cfg_driver_reg {
	CFDD = 0x40,
	CFDD_Sleep = (1 << 31),
	CFDD_Snooze = (1 << 30),
};

#define RxPollInt (RxIntr|RxNoBuf|RxDied|RxJabber)

/* The bits in the CSR5 status registers, mostly interrupt sources. */
enum status_bits {
	TimerInt = 0x800,
	SystemError = 0x2000,
	TPLnkFail = 0x1000,
	TPLnkPass = 0x10,
	NormalIntr = 0x10000,
	AbnormalIntr = 0x8000,
	RxJabber = 0x200,
	RxDied = 0x100,
	RxNoBuf = 0x80,
	RxIntr = 0x40,
	TxFIFOUnderflow = 0x20,
	RxErrIntr = 0x10,
	TxJabber = 0x08,
	TxNoBuf = 0x04,
	TxDied = 0x02,
	TxIntr = 0x01,
};

/* bit mask for CSR5 TX/RX process state */
#define CSR5_TS	0x00700000
#define CSR5_RS	0x000e0000

enum tulip_mode_bits {
	TxThreshold		= (1 << 22),
	FullDuplex		= (1 << 9),
	TxOn			= 0x2000,
	AcceptBroadcast		= 0x0100,
	AcceptAllMulticast	= 0x0080,
	AcceptAllPhys		= 0x0040,
	AcceptRunt		= 0x0008,
	RxOn			= 0x0002,
	RxTx			= (TxOn | RxOn),
};


enum tulip_busconfig_bits {
	MWI			= (1 << 24),
	MRL			= (1 << 23),
	MRM			= (1 << 21),
	CALShift		= 14,
	BurstLenShift		= 8,
};


/* The Tulip Rx and Tx buffer descriptors. */
struct tulip_rx_desc {
	__le32 status;
	__le32 length;
	__le32 buffer1;
	__le32 buffer2;
};


struct tulip_tx_desc {
	__le32 status;
	__le32 length;
	__le32 buffer1;
	__le32 buffer2;		/* We use only buffer 1.  */
};


enum desc_status_bits {
	DescOwned    = 0x80000000,
	DescWholePkt = 0x60000000,
	DescEndPkt   = 0x40000000,
	DescStartPkt = 0x20000000,
	DescEndRing  = 0x02000000,
	DescUseLink  = 0x01000000,
	RxDescFatalErr = 0x008000,
	RxWholePkt   = 0x00000300,
};


enum t21143_csr6_bits {
	csr6_sc = (1<<31),
	csr6_ra = (1<<30),
	csr6_ign_dest_msb = (1<<26),
	csr6_mbo = (1<<25),
	csr6_scr = (1<<24),  /* scramble mode flag: can't be set */
	csr6_pcs = (1<<23),  /* Enables PCS functions (symbol mode requires csr6_ps be set) default is set */
	csr6_ttm = (1<<22),  /* Transmit Threshold Mode, set for 10baseT, 0 for 100BaseTX */
	csr6_sf = (1<<21),   /* Store and forward. If set ignores TR bits */
	csr6_hbd = (1<<19),  /* Heart beat disable. Disables SQE function in 10baseT */
	csr6_ps = (1<<18),   /* Port Select. 0 (defualt) = 10baseT, 1 = 100baseTX: can't be set */
	csr6_ca = (1<<17),   /* Collision Offset Enable. If set uses special algorithm in low collision situations */
	csr6_trh = (1<<15),  /* Transmit Threshold high bit */
	csr6_trl = (1<<14),  /* Transmit Threshold low bit */

	/***************************************************************
	 * This table shows transmit threshold values based on media   *
	 * and these two registers (from PNIC1 & 2 docs) Note: this is *
	 * all meaningless if sf is set.                               *
	 ***************************************************************/

	/***********************************
	 * (trh,trl) * 100BaseTX * 10BaseT *
	 ***********************************
	 *   (0,0)   *     128   *    72   *
	 *   (0,1)   *     256   *    96   *
	 *   (1,0)   *     512   *   128   *
	 *   (1,1)   *    1024   *   160   *
	 ***********************************/

	csr6_fc = (1<<12),   /* Forces a collision in next transmission (for testing in loopback mode) */
	csr6_om_int_loop = (1<<10), /* internal (FIFO) loopback flag */
	csr6_om_ext_loop = (1<<11), /* external (PMD) loopback flag */
	/* set both and you get (PHY) loopback */
	csr6_fd = (1<<9),    /* Full duplex mode, disables hearbeat, no loopback */
	csr6_pm = (1<<7),    /* Pass All Multicast */
	csr6_pr = (1<<6),    /* Promiscuous mode */
	csr6_sb = (1<<5),    /* Start(1)/Stop(0) backoff counter */
	csr6_if = (1<<4),    /* Inverse Filtering, rejects only addresses in address table: can't be set */
	csr6_pb = (1<<3),    /* Pass Bad Frames, (1) causes even bad frames to be passed on */
	csr6_ho = (1<<2),    /* Hash-only filtering mode: can't be set */
	csr6_hp = (1<<0),    /* Hash/Perfect Receive Filtering Mode: can't be set */

	csr6_mask_capture = (csr6_sc | csr6_ca),
	csr6_mask_defstate = (csr6_mask_capture | csr6_mbo),
	csr6_mask_hdcap = (csr6_mask_defstate | csr6_hbd | csr6_ps),
	csr6_mask_hdcaptt = (csr6_mask_hdcap  | csr6_trh | csr6_trl),
	csr6_mask_fullcap = (csr6_mask_hdcaptt | csr6_fd),
	csr6_mask_fullpromisc = (csr6_pr | csr6_pm),
	csr6_mask_filters = (csr6_hp | csr6_ho | csr6_if),
	csr6_mask_100bt = (csr6_scr | csr6_pcs | csr6_hbd),
};


/* Keep the ring sizes a power of two for efficiency.
   Making the Tx ring too large decreases the effectiveness of channel
   bonding and packet priority.
   There are no ill effects from too-large receive rings. */

#define TX_RING_SIZE	32
#define RX_RING_SIZE	128
#define MEDIA_MASK     31

#define PKT_BUF_SZ		1536	/* Size of each temporary Rx buffer. */

#define TULIP_MIN_CACHE_LINE	8	/* in units of 32-bit words */

#if defined(__sparc__) || defined(__hppa__)
/* The UltraSparc PCI controllers will disconnect at every 64-byte
 * crossing anyways so it makes no sense to tell Tulip to burst
 * any more than that.
 */
#define TULIP_MAX_CACHE_LINE	16	/* in units of 32-bit words */
#else
#define TULIP_MAX_CACHE_LINE	32	/* in units of 32-bit words */
#endif


/* Ring-wrap flag in length field, use for last ring entry.
	0x01000000 means chain on buffer2 address,
	0x02000000 means use the ring start address in CSR2/3.
   Note: Some work-alike chips do not function correctly in chained mode.
   The ASIX chip works only in chained mode.
   Thus we indicates ring mode, but always write the 'next' field for
   chained mode as well.
*/
#define DESC_RING_WRAP 0x02000000


#define EEPROM_SIZE 512 	/* 2 << EEPROM_ADDRLEN */


#define RUN_AT(x) (jiffies + (x))

#if defined(__i386__)			/* AKA get_unaligned() */
#define get_u16(ptr) (*(u16 *)(ptr))
#else
#define get_u16(ptr) (((u8*)(ptr))[0] + (((u8*)(ptr))[1]<<8))
#endif

struct medialeaf {
	u8 type;
	u8 media;
	unsigned char *leafdata;
};


struct mediatable {
	u16 defaultmedia;
	u8 leafcount;
	u8 csr12dir;		/* General purpose pin directions. */
	unsigned has_mii:1;
	unsigned has_nonmii:1;
	unsigned has_reset:6;
	u32 csr15dir;
	u32 csr15val;		/* 21143 NWay setting. */
	struct medialeaf mleaf[0];
};


struct mediainfo {
	struct mediainfo *next;
	int info_type;
	int index;
	unsigned char *info;
};

struct ring_info {
	struct sk_buff	*skb;
	dma_addr_t	mapping;
};


struct tulip_private {
	const char *product_name;
	struct net_device *next_module;
	struct tulip_rx_desc *rx_ring;
	struct tulip_tx_desc *tx_ring;
	dma_addr_t rx_ring_dma;
	dma_addr_t tx_ring_dma;
	/* The saved address of a sent-in-place packet/buffer, for skfree(). */
	struct ring_info tx_buffers[TX_RING_SIZE];
	/* The addresses of receive-in-place skbuffs. */
	struct ring_info rx_buffers[RX_RING_SIZE];
	u16 setup_frame[96];	/* Pseudo-Tx frame to init address table. */
	int chip_id;
	int revision;
	int flags;
	struct napi_struct napi;
	struct net_device_stats stats;
	struct timer_list timer;	/* Media selection timer. */
	struct timer_list oom_timer;    /* Out of memory timer. */
	u32 mc_filter[2];
	spinlock_t lock;
	spinlock_t mii_lock;
	unsigned int cur_rx, cur_tx;	/* The next free ring entry */
	unsigned int dirty_rx, dirty_tx;	/* The ring entries to be free()ed. */

#ifdef 	CONFIG_TULIP_NAPI_HW_MITIGATION
        int mit_on;
#endif
	unsigned int full_duplex:1;	/* Full-duplex operation requested. */
	unsigned int full_duplex_lock:1;
	unsigned int fake_addr:1;	/* Multiport board faked address. */
	unsigned int default_port:4;	/* Last dev->if_port value. */
	unsigned int media2:4;	/* Secondary monitored media port. */
	unsigned int medialock:1;	/* Don't sense media type. */
	unsigned int mediasense:1;	/* Media sensing in progress. */
	unsigned int nway:1, nwayset:1;		/* 21143 internal NWay. */
	unsigned int timeout_recovery:1;
	unsigned int csr0;	/* CSR0 setting. */
	unsigned int csr6;	/* Current CSR6 control settings. */
	unsigned char eeprom[EEPROM_SIZE];	/* Serial EEPROM contents. */
	void (*link_change) (struct net_device * dev, int csr5);
	u16 sym_advertise, mii_advertise; /* NWay capabilities advertised.  */
	u16 lpar;		/* 21143 Link partner ability. */
	u16 advertising[4];
	signed char phys[4], mii_cnt;	/* MII device addresses. */
	struct mediatable *mtable;
	int cur_index;		/* Current media index. */
	int saved_if_port;
	struct pci_dev *pdev;
	int ttimer;
	int susp_rx;
	unsigned long nir;
	void __iomem *base_addr;
	int csr12_shadow;
	int pad0;		/* Used for 8-byte alignment */
	struct work_struct media_work;
	struct net_device *dev;
};


struct eeprom_fixup {
	char *name;
	unsigned char addr0;
	unsigned char addr1;
	unsigned char addr2;
	u16 newtable[32];	/* Max length below. */
};


/* 21142.c */
extern u16 t21142_csr14[];
void t21142_media_task(struct work_struct *work);
void t21142_start_nway(struct net_device *dev);
void t21142_lnk_change(struct net_device *dev, int csr5);


/* PNIC2.c */
void pnic2_lnk_change(struct net_device *dev, int csr5);
void pnic2_timer(unsigned long data);
void pnic2_start_nway(struct net_device *dev);
void pnic2_lnk_change(struct net_device *dev, int csr5);

/* eeprom.c */
void tulip_parse_eeprom(struct net_device *dev);
int tulip_read_eeprom(struct net_device *dev, int location, int addr_len);

/* interrupt.c */
extern unsigned int tulip_max_interrupt_work;
extern int tulip_rx_copybreak;
irqreturn_t tulip_interrupt(int irq, void *dev_instance);
int tulip_refill_rx(struct net_device *dev);
#ifdef CONFIG_TULIP_NAPI
int tulip_poll(struct napi_struct *napi, int budget);
#endif


/* media.c */
int tulip_mdio_read(struct net_device *dev, int phy_id, int location);
void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int value);
void tulip_select_media(struct net_device *dev, int startup);
int tulip_check_duplex(struct net_device *dev);
void tulip_find_mii (struct net_device *dev, int board_idx);

/* pnic.c */
void pnic_do_nway(struct net_device *dev);
void pnic_lnk_change(struct net_device *dev, int csr5);
void pnic_timer(unsigned long data);

/* timer.c */
void tulip_media_task(struct work_struct *work);
void mxic_timer(unsigned long data);
void comet_timer(unsigned long data);

/* tulip_core.c */
extern int tulip_debug;
extern const char * const medianame[];
extern const char tulip_media_cap[];
extern struct tulip_chip_table tulip_tbl[];
void oom_timer(unsigned long data);
extern u8 t21040_csr13[];

static inline void tulip_start_rxtx(struct tulip_private *tp)
{
	void __iomem *ioaddr = tp->base_addr;
	iowrite32(tp->csr6 | RxTx, ioaddr + CSR6);
	barrier();
	(void) ioread32(ioaddr + CSR6); /* mmio sync */
}

static inline void tulip_stop_rxtx(struct tulip_private *tp)
{
	void __iomem *ioaddr = tp->base_addr;
	u32 csr6 = ioread32(ioaddr + CSR6);

	if (csr6 & RxTx) {
		unsigned i=1300/10;
		iowrite32(csr6 & ~RxTx, ioaddr + CSR6);
		barrier();
		/* wait until in-flight frame completes.
		 * Max time @ 10BT: 1500*8b/10Mbps == 1200us (+ 100us margin)
		 * Typically expect this loop to end in < 50 us on 100BT.
		 */
		while (--i && (ioread32(ioaddr + CSR5) & (CSR5_TS|CSR5_RS)))
			udelay(10);

		if (!i)
			printk(KERN_DEBUG "%s: tulip_stop_rxtx() failed"
					" (CSR5 0x%x CSR6 0x%x)\n",
					pci_name(tp->pdev),
					ioread32(ioaddr + CSR5),
					ioread32(ioaddr + CSR6));
	}
}

static inline void tulip_restart_rxtx(struct tulip_private *tp)
{
	tulip_stop_rxtx(tp);
	udelay(5);
	tulip_start_rxtx(tp);
}

static inline void tulip_tx_timeout_complete(struct tulip_private *tp, void __iomem *ioaddr)
{
	/* Stop and restart the chip's Tx processes. */
	tulip_restart_rxtx(tp);
	/* Trigger an immediate transmit demand. */
	iowrite32(0, ioaddr + CSR1);

	tp->stats.tx_errors++;
}

#endif /* __NET_TULIP_H__ */