1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ACENIC_H_
3 #define _ACENIC_H_
4 #include <linux/interrupt.h>
5 
6 
7 /*
8  * Generate TX index update each time, when TX ring is closed.
9  * Normally, this is not useful, because results in more dma (and irqs
10  * without TX_COAL_INTS_ONLY).
11  */
12 #define USE_TX_COAL_NOW	 0
13 
14 /*
15  * Addressing:
16  *
17  * The Tigon uses 64-bit host addresses, regardless of their actual
18  * length, and it expects a big-endian format. For 32 bit systems the
19  * upper 32 bits of the address are simply ignored (zero), however for
20  * little endian 64 bit systems (Alpha) this looks strange with the
21  * two parts of the address word being swapped.
22  *
23  * The addresses are split in two 32 bit words for all architectures
24  * as some of them are in PCI shared memory and it is necessary to use
25  * readl/writel to access them.
26  *
27  * The addressing code is derived from Pete Wyckoff's work, but
28  * modified to deal properly with readl/writel usage.
29  */
30 
31 struct ace_regs {
32 	u32	pad0[16];	/* PCI control registers */
33 
34 	u32	HostCtrl;	/* 0x40 */
35 	u32	LocalCtrl;
36 
37 	u32	pad1[2];
38 
39 	u32	MiscCfg;	/* 0x50 */
40 
41 	u32	pad2[2];
42 
43 	u32	PciState;
44 
45 	u32	pad3[2];	/* 0x60 */
46 
47 	u32	WinBase;
48 	u32	WinData;
49 
50 	u32	pad4[12];	/* 0x70 */
51 
52 	u32	DmaWriteState;	/* 0xa0 */
53 	u32	pad5[3];
54 	u32	DmaReadState;	/* 0xb0 */
55 
56 	u32	pad6[26];
57 
58 	u32	AssistState;
59 
60 	u32	pad7[8];	/* 0x120 */
61 
62 	u32	CpuCtrl;	/* 0x140 */
63 	u32	Pc;
64 
65 	u32	pad8[3];
66 
67 	u32	SramAddr;	/* 0x154 */
68 	u32	SramData;
69 
70 	u32	pad9[49];
71 
72 	u32	MacRxState;	/* 0x220 */
73 
74 	u32	pad10[7];
75 
76 	u32	CpuBCtrl;	/* 0x240 */
77 	u32	PcB;
78 
79 	u32	pad11[3];
80 
81 	u32	SramBAddr;	/* 0x254 */
82 	u32	SramBData;
83 
84 	u32	pad12[105];
85 
86 	u32	pad13[32];	/* 0x400 */
87 	u32	Stats[32];
88 
89 	u32	Mb0Hi;		/* 0x500 */
90 	u32	Mb0Lo;
91 	u32	Mb1Hi;
92 	u32	CmdPrd;
93 	u32	Mb2Hi;
94 	u32	TxPrd;
95 	u32	Mb3Hi;
96 	u32	RxStdPrd;
97 	u32	Mb4Hi;
98 	u32	RxJumboPrd;
99 	u32	Mb5Hi;
100 	u32	RxMiniPrd;
101 	u32	Mb6Hi;
102 	u32	Mb6Lo;
103 	u32	Mb7Hi;
104 	u32	Mb7Lo;
105 	u32	Mb8Hi;
106 	u32	Mb8Lo;
107 	u32	Mb9Hi;
108 	u32	Mb9Lo;
109 	u32	MbAHi;
110 	u32	MbALo;
111 	u32	MbBHi;
112 	u32	MbBLo;
113 	u32	MbCHi;
114 	u32	MbCLo;
115 	u32	MbDHi;
116 	u32	MbDLo;
117 	u32	MbEHi;
118 	u32	MbELo;
119 	u32	MbFHi;
120 	u32	MbFLo;
121 
122 	u32	pad14[32];
123 
124 	u32	MacAddrHi;	/* 0x600 */
125 	u32	MacAddrLo;
126 	u32	InfoPtrHi;
127 	u32	InfoPtrLo;
128 	u32	MultiCastHi;	/* 0x610 */
129 	u32	MultiCastLo;
130 	u32	ModeStat;
131 	u32	DmaReadCfg;
132 	u32	DmaWriteCfg;	/* 0x620 */
133 	u32	TxBufRat;
134 	u32	EvtCsm;
135 	u32	CmdCsm;
136 	u32	TuneRxCoalTicks;/* 0x630 */
137 	u32	TuneTxCoalTicks;
138 	u32	TuneStatTicks;
139 	u32	TuneMaxTxDesc;
140 	u32	TuneMaxRxDesc;	/* 0x640 */
141 	u32	TuneTrace;
142 	u32	TuneLink;
143 	u32	TuneFastLink;
144 	u32	TracePtr;	/* 0x650 */
145 	u32	TraceStrt;
146 	u32	TraceLen;
147 	u32	IfIdx;
148 	u32	IfMtu;		/* 0x660 */
149 	u32	MaskInt;
150 	u32	GigLnkState;
151 	u32	FastLnkState;
152 	u32	pad16[4];	/* 0x670 */
153 	u32	RxRetCsm;	/* 0x680 */
154 
155 	u32	pad17[31];
156 
157 	u32	CmdRng[64];	/* 0x700 */
158 	u32	Window[0x200];
159 };
160 
161 
162 typedef struct {
163 	u32 addrhi;
164 	u32 addrlo;
165 } aceaddr;
166 
167 
168 #define ACE_WINDOW_SIZE	0x800
169 
170 #define ACE_JUMBO_MTU 9000
171 #define ACE_STD_MTU 1500
172 
173 #define ACE_TRACE_SIZE 0x8000
174 
175 /*
176  * Host control register bits.
177  */
178 
179 #define IN_INT		0x01
180 #define CLR_INT		0x02
181 #define HW_RESET	0x08
182 #define BYTE_SWAP	0x10
183 #define WORD_SWAP	0x20
184 #define MASK_INTS	0x40
185 
186 /*
187  * Local control register bits.
188  */
189 
190 #define EEPROM_DATA_IN		0x800000
191 #define EEPROM_DATA_OUT		0x400000
192 #define EEPROM_WRITE_ENABLE	0x200000
193 #define EEPROM_CLK_OUT		0x100000
194 
195 #define EEPROM_BASE		0xa0000000
196 
197 #define EEPROM_WRITE_SELECT	0xa0
198 #define EEPROM_READ_SELECT	0xa1
199 
200 #define SRAM_BANK_512K		0x200
201 
202 
203 /*
204  * udelay() values for when clocking the eeprom
205  */
206 #define ACE_SHORT_DELAY		2
207 #define ACE_LONG_DELAY		4
208 
209 
210 /*
211  * Misc Config bits
212  */
213 
214 #define SYNC_SRAM_TIMING	0x100000
215 
216 
217 /*
218  * CPU state bits.
219  */
220 
221 #define CPU_RESET		0x01
222 #define CPU_TRACE		0x02
223 #define CPU_PROM_FAILED		0x10
224 #define CPU_HALT		0x00010000
225 #define CPU_HALTED		0xffff0000
226 
227 
228 /*
229  * PCI State bits.
230  */
231 
232 #define DMA_READ_MAX_4		0x04
233 #define DMA_READ_MAX_16		0x08
234 #define DMA_READ_MAX_32		0x0c
235 #define DMA_READ_MAX_64		0x10
236 #define DMA_READ_MAX_128	0x14
237 #define DMA_READ_MAX_256	0x18
238 #define DMA_READ_MAX_1K		0x1c
239 #define DMA_WRITE_MAX_4		0x20
240 #define DMA_WRITE_MAX_16	0x40
241 #define DMA_WRITE_MAX_32	0x60
242 #define DMA_WRITE_MAX_64	0x80
243 #define DMA_WRITE_MAX_128	0xa0
244 #define DMA_WRITE_MAX_256	0xc0
245 #define DMA_WRITE_MAX_1K	0xe0
246 #define DMA_READ_WRITE_MASK	0xfc
247 #define MEM_READ_MULTIPLE	0x00020000
248 #define PCI_66MHZ		0x00080000
249 #define PCI_32BIT		0x00100000
250 #define DMA_WRITE_ALL_ALIGN	0x00800000
251 #define READ_CMD_MEM		0x06000000
252 #define WRITE_CMD_MEM		0x70000000
253 
254 
255 /*
256  * Mode status
257  */
258 
259 #define ACE_BYTE_SWAP_BD	0x02
260 #define ACE_WORD_SWAP_BD	0x04		/* not actually used */
261 #define ACE_WARN		0x08
262 #define ACE_BYTE_SWAP_DMA	0x10
263 #define ACE_NO_JUMBO_FRAG	0x200
264 #define ACE_FATAL		0x40000000
265 
266 
267 /*
268  * DMA config
269  */
270 
271 #define DMA_THRESH_1W		0x10
272 #define DMA_THRESH_2W		0x20
273 #define DMA_THRESH_4W		0x40
274 #define DMA_THRESH_8W		0x80
275 #define DMA_THRESH_16W		0x100
276 #define DMA_THRESH_32W		0x0	/* not described in doc, but exists. */
277 
278 
279 /*
280  * Tuning parameters
281  */
282 
283 #define TICKS_PER_SEC		1000000
284 
285 
286 /*
287  * Link bits
288  */
289 
290 #define LNK_PREF		0x00008000
291 #define LNK_10MB		0x00010000
292 #define LNK_100MB		0x00020000
293 #define LNK_1000MB		0x00040000
294 #define LNK_FULL_DUPLEX		0x00080000
295 #define LNK_HALF_DUPLEX		0x00100000
296 #define LNK_TX_FLOW_CTL_Y	0x00200000
297 #define LNK_NEG_ADVANCED	0x00400000
298 #define LNK_RX_FLOW_CTL_Y	0x00800000
299 #define LNK_NIC			0x01000000
300 #define LNK_JAM			0x02000000
301 #define LNK_JUMBO		0x04000000
302 #define LNK_ALTEON		0x08000000
303 #define LNK_NEG_FCTL		0x10000000
304 #define LNK_NEGOTIATE		0x20000000
305 #define LNK_ENABLE		0x40000000
306 #define LNK_UP			0x80000000
307 
308 
309 /*
310  * Event definitions
311  */
312 
313 #define EVT_RING_ENTRIES	256
314 #define EVT_RING_SIZE	(EVT_RING_ENTRIES * sizeof(struct event))
315 
316 struct event {
317 #ifdef __LITTLE_ENDIAN_BITFIELD
318 	u32	idx:12;
319 	u32	code:12;
320 	u32	evt:8;
321 #else
322 	u32	evt:8;
323 	u32	code:12;
324 	u32	idx:12;
325 #endif
326 	u32     pad;
327 };
328 
329 
330 /*
331  * Events
332  */
333 
334 #define E_FW_RUNNING		0x01
335 #define E_STATS_UPDATED		0x04
336 
337 #define E_STATS_UPDATE		0x04
338 
339 #define E_LNK_STATE		0x06
340 #define E_C_LINK_UP		0x01
341 #define E_C_LINK_DOWN		0x02
342 #define E_C_LINK_10_100		0x03
343 
344 #define E_ERROR			0x07
345 #define E_C_ERR_INVAL_CMD	0x01
346 #define E_C_ERR_UNIMP_CMD	0x02
347 #define E_C_ERR_BAD_CFG		0x03
348 
349 #define E_MCAST_LIST		0x08
350 #define E_C_MCAST_ADDR_ADD	0x01
351 #define E_C_MCAST_ADDR_DEL	0x02
352 
353 #define E_RESET_JUMBO_RNG	0x09
354 
355 
356 /*
357  * Commands
358  */
359 
360 #define CMD_RING_ENTRIES	64
361 
362 struct cmd {
363 #ifdef __LITTLE_ENDIAN_BITFIELD
364 	u32	idx:12;
365 	u32	code:12;
366 	u32	evt:8;
367 #else
368 	u32	evt:8;
369 	u32	code:12;
370 	u32	idx:12;
371 #endif
372 };
373 
374 
375 #define C_HOST_STATE		0x01
376 #define C_C_STACK_UP		0x01
377 #define C_C_STACK_DOWN		0x02
378 
379 #define C_FDR_FILTERING		0x02
380 #define C_C_FDR_FILT_ENABLE	0x01
381 #define C_C_FDR_FILT_DISABLE	0x02
382 
383 #define C_SET_RX_PRD_IDX	0x03
384 #define C_UPDATE_STATS		0x04
385 #define C_RESET_JUMBO_RNG	0x05
386 #define C_ADD_MULTICAST_ADDR	0x08
387 #define C_DEL_MULTICAST_ADDR	0x09
388 
389 #define C_SET_PROMISC_MODE	0x0a
390 #define C_C_PROMISC_ENABLE	0x01
391 #define C_C_PROMISC_DISABLE	0x02
392 
393 #define C_LNK_NEGOTIATION	0x0b
394 #define C_C_NEGOTIATE_BOTH	0x00
395 #define C_C_NEGOTIATE_GIG	0x01
396 #define C_C_NEGOTIATE_10_100	0x02
397 
398 #define C_SET_MAC_ADDR		0x0c
399 #define C_CLEAR_PROFILE		0x0d
400 
401 #define C_SET_MULTICAST_MODE	0x0e
402 #define C_C_MCAST_ENABLE	0x01
403 #define C_C_MCAST_DISABLE	0x02
404 
405 #define C_CLEAR_STATS		0x0f
406 #define C_SET_RX_JUMBO_PRD_IDX	0x10
407 #define C_REFRESH_STATS		0x11
408 
409 
410 /*
411  * Descriptor flags
412  */
413 #define BD_FLG_TCP_UDP_SUM	0x01
414 #define BD_FLG_IP_SUM		0x02
415 #define BD_FLG_END		0x04
416 #define BD_FLG_MORE		0x08
417 #define BD_FLG_JUMBO		0x10
418 #define BD_FLG_UCAST		0x20
419 #define BD_FLG_MCAST		0x40
420 #define BD_FLG_BCAST		0x60
421 #define BD_FLG_TYP_MASK		0x60
422 #define BD_FLG_IP_FRAG		0x80
423 #define BD_FLG_IP_FRAG_END	0x100
424 #define BD_FLG_VLAN_TAG		0x200
425 #define BD_FLG_FRAME_ERROR	0x400
426 #define BD_FLG_COAL_NOW		0x800
427 #define BD_FLG_MINI		0x1000
428 
429 
430 /*
431  * Ring Control block flags
432  */
433 #define RCB_FLG_TCP_UDP_SUM	0x01
434 #define RCB_FLG_IP_SUM		0x02
435 #define RCB_FLG_NO_PSEUDO_HDR	0x08
436 #define RCB_FLG_VLAN_ASSIST	0x10
437 #define RCB_FLG_COAL_INT_ONLY	0x20
438 #define RCB_FLG_TX_HOST_RING	0x40
439 #define RCB_FLG_IEEE_SNAP_SUM	0x80
440 #define RCB_FLG_EXT_RX_BD	0x100
441 #define RCB_FLG_RNG_DISABLE	0x200
442 
443 
444 /*
445  * TX ring - maximum TX ring entries for Tigon I's is 128
446  */
447 #define MAX_TX_RING_ENTRIES	256
448 #define TIGON_I_TX_RING_ENTRIES	128
449 #define TX_RING_SIZE		(MAX_TX_RING_ENTRIES * sizeof(struct tx_desc))
450 #define TX_RING_BASE		0x3800
451 
452 struct tx_desc{
453         aceaddr	addr;
454 	u32	flagsize;
455 #if 0
456 /*
457  * This is in PCI shared mem and must be accessed with readl/writel
458  * real layout is:
459  */
460 #if __LITTLE_ENDIAN
461 	u16	flags;
462 	u16	size;
463 	u16	vlan;
464 	u16	reserved;
465 #else
466 	u16	size;
467 	u16	flags;
468 	u16	reserved;
469 	u16	vlan;
470 #endif
471 #endif
472 	u32	vlanres;
473 };
474 
475 
476 #define RX_STD_RING_ENTRIES	512
477 #define RX_STD_RING_SIZE	(RX_STD_RING_ENTRIES * sizeof(struct rx_desc))
478 
479 #define RX_JUMBO_RING_ENTRIES	256
480 #define RX_JUMBO_RING_SIZE	(RX_JUMBO_RING_ENTRIES *sizeof(struct rx_desc))
481 
482 #define RX_MINI_RING_ENTRIES	1024
483 #define RX_MINI_RING_SIZE	(RX_MINI_RING_ENTRIES *sizeof(struct rx_desc))
484 
485 #define RX_RETURN_RING_ENTRIES	2048
486 #define RX_RETURN_RING_SIZE	(RX_MAX_RETURN_RING_ENTRIES * \
487 				 sizeof(struct rx_desc))
488 
489 struct rx_desc{
490 	aceaddr	addr;
491 #ifdef __LITTLE_ENDIAN
492 	u16	size;
493 	u16	idx;
494 #else
495 	u16	idx;
496 	u16	size;
497 #endif
498 #ifdef __LITTLE_ENDIAN
499 	u16	flags;
500 	u16	type;
501 #else
502 	u16	type;
503 	u16	flags;
504 #endif
505 #ifdef __LITTLE_ENDIAN
506 	u16	tcp_udp_csum;
507 	u16	ip_csum;
508 #else
509 	u16	ip_csum;
510 	u16	tcp_udp_csum;
511 #endif
512 #ifdef __LITTLE_ENDIAN
513 	u16	vlan;
514 	u16	err_flags;
515 #else
516 	u16	err_flags;
517 	u16	vlan;
518 #endif
519 	u32	reserved;
520 	u32	opague;
521 };
522 
523 
524 /*
525  * This struct is shared with the NIC firmware.
526  */
527 struct ring_ctrl {
528 	aceaddr	rngptr;
529 #ifdef __LITTLE_ENDIAN
530 	u16	flags;
531 	u16	max_len;
532 #else
533 	u16	max_len;
534 	u16	flags;
535 #endif
536 	u32	pad;
537 };
538 
539 
540 struct ace_mac_stats {
541 	u32 excess_colls;
542 	u32 coll_1;
543 	u32 coll_2;
544 	u32 coll_3;
545 	u32 coll_4;
546 	u32 coll_5;
547 	u32 coll_6;
548 	u32 coll_7;
549 	u32 coll_8;
550 	u32 coll_9;
551 	u32 coll_10;
552 	u32 coll_11;
553 	u32 coll_12;
554 	u32 coll_13;
555 	u32 coll_14;
556 	u32 coll_15;
557 	u32 late_coll;
558 	u32 defers;
559 	u32 crc_err;
560 	u32 underrun;
561 	u32 crs_err;
562 	u32 pad[3];
563 	u32 drop_ula;
564 	u32 drop_mc;
565 	u32 drop_fc;
566 	u32 drop_space;
567 	u32 coll;
568 	u32 kept_bc;
569 	u32 kept_mc;
570 	u32 kept_uc;
571 };
572 
573 
574 struct ace_info {
575 	union {
576 		u32 stats[256];
577 	} s;
578 	struct ring_ctrl	evt_ctrl;
579 	struct ring_ctrl	cmd_ctrl;
580 	struct ring_ctrl	tx_ctrl;
581 	struct ring_ctrl	rx_std_ctrl;
582 	struct ring_ctrl	rx_jumbo_ctrl;
583 	struct ring_ctrl	rx_mini_ctrl;
584 	struct ring_ctrl	rx_return_ctrl;
585 	aceaddr	evt_prd_ptr;
586 	aceaddr	rx_ret_prd_ptr;
587 	aceaddr	tx_csm_ptr;
588 	aceaddr	stats2_ptr;
589 };
590 
591 
592 struct ring_info {
593 	struct sk_buff		*skb;
594 	DEFINE_DMA_UNMAP_ADDR(mapping);
595 };
596 
597 
598 /*
599  * Funny... As soon as we add maplen on alpha, it starts to work
600  * much slower. Hmm... is it because struct does not fit to one cacheline?
601  * So, split tx_ring_info.
602  */
603 struct tx_ring_info {
604 	struct sk_buff		*skb;
605 	DEFINE_DMA_UNMAP_ADDR(mapping);
606 	DEFINE_DMA_UNMAP_LEN(maplen);
607 };
608 
609 
610 /*
611  * struct ace_skb holding the rings of skb's. This is an awful lot of
612  * pointers, but I don't see any other smart mode to do this in an
613  * efficient manner ;-(
614  */
615 struct ace_skb
616 {
617 	struct tx_ring_info	tx_skbuff[MAX_TX_RING_ENTRIES];
618 	struct ring_info	rx_std_skbuff[RX_STD_RING_ENTRIES];
619 	struct ring_info	rx_mini_skbuff[RX_MINI_RING_ENTRIES];
620 	struct ring_info	rx_jumbo_skbuff[RX_JUMBO_RING_ENTRIES];
621 };
622 
623 
624 /*
625  * Struct private for the AceNIC.
626  *
627  * Elements are grouped so variables used by the tx handling goes
628  * together, and will go into the same cache lines etc. in order to
629  * avoid cache line contention between the rx and tx handling on SMP.
630  *
631  * Frequently accessed variables are put at the beginning of the
632  * struct to help the compiler generate better/shorter code.
633  */
634 struct ace_private
635 {
636 	struct net_device	*ndev;		/* backpointer */
637 	struct ace_info		*info;
638 	struct ace_regs	__iomem	*regs;		/* register base */
639 	struct ace_skb		*skb;
640 	dma_addr_t		info_dma;	/* 32/64 bit */
641 
642 	int			version, link;
643 	int			promisc, mcast_all;
644 
645 	/*
646 	 * TX elements
647 	 */
648 	struct tx_desc		*tx_ring;
649 	u32			tx_prd;
650 	volatile u32		tx_ret_csm;
651 	int			tx_ring_entries;
652 
653 	/*
654 	 * RX elements
655 	 */
656 	unsigned long		std_refill_busy
657 				__attribute__ ((aligned (SMP_CACHE_BYTES)));
658 	unsigned long		mini_refill_busy, jumbo_refill_busy;
659 	atomic_t		cur_rx_bufs;
660 	atomic_t		cur_mini_bufs;
661 	atomic_t		cur_jumbo_bufs;
662 	u32			rx_std_skbprd, rx_mini_skbprd, rx_jumbo_skbprd;
663 	u32			cur_rx;
664 
665 	struct rx_desc		*rx_std_ring;
666 	struct rx_desc		*rx_jumbo_ring;
667 	struct rx_desc		*rx_mini_ring;
668 	struct rx_desc		*rx_return_ring;
669 
670 	int			tasklet_pending, jumbo;
671 	struct tasklet_struct	ace_tasklet;
672 
673 	struct event		*evt_ring;
674 
675 	volatile u32		*evt_prd, *rx_ret_prd, *tx_csm;
676 
677 	dma_addr_t		tx_ring_dma;	/* 32/64 bit */
678 	dma_addr_t		rx_ring_base_dma;
679 	dma_addr_t		evt_ring_dma;
680 	dma_addr_t		evt_prd_dma, rx_ret_prd_dma, tx_csm_dma;
681 
682 	unsigned char		*trace_buf;
683 	struct pci_dev		*pdev;
684 	struct net_device	*next;
685 	volatile int		fw_running;
686 	int			board_idx;
687 	u16			pci_command;
688 	u8			pci_latency;
689 	const char		*name;
690 #ifdef INDEX_DEBUG
691 	spinlock_t		debug_lock
692 				__attribute__ ((aligned (SMP_CACHE_BYTES)));
693 	u32			last_tx, last_std_rx, last_mini_rx;
694 #endif
695 	int			pci_using_dac;
696 	u8			firmware_major;
697 	u8			firmware_minor;
698 	u8			firmware_fix;
699 	u32			firmware_start;
700 };
701 
702 
703 #define TX_RESERVED	MAX_SKB_FRAGS
704 
705 static inline int tx_space (struct ace_private *ap, u32 csm, u32 prd)
706 {
707 	return (csm - prd - 1) & (ACE_TX_RING_ENTRIES(ap) - 1);
708 }
709 
710 #define tx_free(ap) 		tx_space((ap)->tx_ret_csm, (ap)->tx_prd, ap)
711 #define tx_ring_full(ap, csm, prd)	(tx_space(ap, csm, prd) <= TX_RESERVED)
712 
713 static inline void set_aceaddr(aceaddr *aa, dma_addr_t addr)
714 {
715 	u64 baddr = (u64) addr;
716 	aa->addrlo = baddr & 0xffffffff;
717 	aa->addrhi = baddr >> 32;
718 	wmb();
719 }
720 
721 
722 static inline void ace_set_txprd(struct ace_regs __iomem *regs,
723 				 struct ace_private *ap, u32 value)
724 {
725 #ifdef INDEX_DEBUG
726 	unsigned long flags;
727 	spin_lock_irqsave(&ap->debug_lock, flags);
728 	writel(value, &regs->TxPrd);
729 	if (value == ap->last_tx)
730 		printk(KERN_ERR "AceNIC RACE ALERT! writing identical value "
731 		       "to tx producer (%i)\n", value);
732 	ap->last_tx = value;
733 	spin_unlock_irqrestore(&ap->debug_lock, flags);
734 #else
735 	writel(value, &regs->TxPrd);
736 #endif
737 	wmb();
738 }
739 
740 
741 static inline void ace_mask_irq(struct net_device *dev)
742 {
743 	struct ace_private *ap = netdev_priv(dev);
744 	struct ace_regs __iomem *regs = ap->regs;
745 
746 	if (ACE_IS_TIGON_I(ap))
747 		writel(1, &regs->MaskInt);
748 	else
749 		writel(readl(&regs->HostCtrl) | MASK_INTS, &regs->HostCtrl);
750 
751 	ace_sync_irq(dev->irq);
752 }
753 
754 
755 static inline void ace_unmask_irq(struct net_device *dev)
756 {
757 	struct ace_private *ap = netdev_priv(dev);
758 	struct ace_regs __iomem *regs = ap->regs;
759 
760 	if (ACE_IS_TIGON_I(ap))
761 		writel(0, &regs->MaskInt);
762 	else
763 		writel(readl(&regs->HostCtrl) & ~MASK_INTS, &regs->HostCtrl);
764 }
765 
766 
767 /*
768  * Prototypes
769  */
770 static int ace_init(struct net_device *dev);
771 static void ace_load_std_rx_ring(struct net_device *dev, int nr_bufs);
772 static void ace_load_mini_rx_ring(struct net_device *dev, int nr_bufs);
773 static void ace_load_jumbo_rx_ring(struct net_device *dev, int nr_bufs);
774 static irqreturn_t ace_interrupt(int irq, void *dev_id);
775 static int ace_load_firmware(struct net_device *dev);
776 static int ace_open(struct net_device *dev);
777 static netdev_tx_t ace_start_xmit(struct sk_buff *skb,
778 				  struct net_device *dev);
779 static int ace_close(struct net_device *dev);
780 static void ace_tasklet(struct tasklet_struct *t);
781 static void ace_dump_trace(struct ace_private *ap);
782 static void ace_set_multicast_list(struct net_device *dev);
783 static int ace_change_mtu(struct net_device *dev, int new_mtu);
784 static int ace_set_mac_addr(struct net_device *dev, void *p);
785 static void ace_set_rxtx_parms(struct net_device *dev, int jumbo);
786 static int ace_allocate_descriptors(struct net_device *dev);
787 static void ace_free_descriptors(struct net_device *dev);
788 static void ace_init_cleanup(struct net_device *dev);
789 static struct net_device_stats *ace_get_stats(struct net_device *dev);
790 static int read_eeprom_byte(struct net_device *dev, unsigned long offset);
791 
792 #endif /* _ACENIC_H_ */
793