summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/broadcom/genet/bcmgenet.h
blob: 4a8fc03d82fd4676731f6fb93c89d22c799fc64c (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
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2014-2017 Broadcom
 */

#ifndef __BCMGENET_H__
#define __BCMGENET_H__

#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/spinlock.h>
#include <linux/clk.h>
#include <linux/mii.h>
#include <linux/if_vlan.h>
#include <linux/phy.h>
#include <linux/dim.h>

/* total number of Buffer Descriptors, same for Rx/Tx */
#define TOTAL_DESC				256

/* which ring is descriptor based */
#define DESC_INDEX				16

/* Body(1500) + EH_SIZE(14) + VLANTAG(4) + BRCMTAG(6) + FCS(4) = 1528.
 * 1536 is multiple of 256 bytes
 */
#define ENET_BRCM_TAG_LEN	6
#define ENET_PAD		8
#define ENET_MAX_MTU_SIZE	(ETH_DATA_LEN + ETH_HLEN + VLAN_HLEN + \
				 ENET_BRCM_TAG_LEN + ETH_FCS_LEN + ENET_PAD)
#define DMA_MAX_BURST_LENGTH    0x10

/* misc. configuration */
#define CLEAR_ALL_HFB			0xFF
#define DMA_FC_THRESH_HI		(TOTAL_DESC >> 4)
#define DMA_FC_THRESH_LO		5

/* 64B receive/transmit status block */
struct status_64 {
	u32	length_status;		/* length and peripheral status */
	u32	ext_status;		/* Extended status*/
	u32	rx_csum;		/* partial rx checksum */
	u32	unused1[9];		/* unused */
	u32	tx_csum_info;		/* Tx checksum info. */
	u32	unused2[3];		/* unused */
};

/* Rx status bits */
#define STATUS_RX_EXT_MASK		0x1FFFFF
#define STATUS_RX_CSUM_MASK		0xFFFF
#define STATUS_RX_CSUM_OK		0x10000
#define STATUS_RX_CSUM_FR		0x20000
#define STATUS_RX_PROTO_TCP		0
#define STATUS_RX_PROTO_UDP		1
#define STATUS_RX_PROTO_ICMP		2
#define STATUS_RX_PROTO_OTHER		3
#define STATUS_RX_PROTO_MASK		3
#define STATUS_RX_PROTO_SHIFT		18
#define STATUS_FILTER_INDEX_MASK	0xFFFF
/* Tx status bits */
#define STATUS_TX_CSUM_START_MASK	0X7FFF
#define STATUS_TX_CSUM_START_SHIFT	16
#define STATUS_TX_CSUM_PROTO_UDP	0x8000
#define STATUS_TX_CSUM_OFFSET_MASK	0x7FFF
#define STATUS_TX_CSUM_LV		0x80000000

/* DMA Descriptor */
#define DMA_DESC_LENGTH_STATUS	0x00	/* in bytes of data in buffer */
#define DMA_DESC_ADDRESS_LO	0x04	/* lower bits of PA */
#define DMA_DESC_ADDRESS_HI	0x08	/* upper 32 bits of PA, GENETv4+ */

/* Rx/Tx common counter group */
struct bcmgenet_pkt_counters {
	u32	cnt_64;		/* RO Received/Transmited 64 bytes packet */
	u32	cnt_127;	/* RO Rx/Tx 127 bytes packet */
	u32	cnt_255;	/* RO Rx/Tx 65-255 bytes packet */
	u32	cnt_511;	/* RO Rx/Tx 256-511 bytes packet */
	u32	cnt_1023;	/* RO Rx/Tx 512-1023 bytes packet */
	u32	cnt_1518;	/* RO Rx/Tx 1024-1518 bytes packet */
	u32	cnt_mgv;	/* RO Rx/Tx 1519-1522 good VLAN packet */
	u32	cnt_2047;	/* RO Rx/Tx 1522-2047 bytes packet*/
	u32	cnt_4095;	/* RO Rx/Tx 2048-4095 bytes packet*/
	u32	cnt_9216;	/* RO Rx/Tx 4096-9216 bytes packet*/
};

/* RSV, Receive Status Vector */
struct bcmgenet_rx_counters {
	struct  bcmgenet_pkt_counters pkt_cnt;
	u32	pkt;		/* RO (0x428) Received pkt count*/
	u32	bytes;		/* RO Received byte count */
	u32	mca;		/* RO # of Received multicast pkt */
	u32	bca;		/* RO # of Receive broadcast pkt */
	u32	fcs;		/* RO # of Received FCS error  */
	u32	cf;		/* RO # of Received control frame pkt*/
	u32	pf;		/* RO # of Received pause frame pkt */
	u32	uo;		/* RO # of unknown op code pkt */
	u32	aln;		/* RO # of alignment error count */
	u32	flr;		/* RO # of frame length out of range count */
	u32	cde;		/* RO # of code error pkt */
	u32	fcr;		/* RO # of carrier sense error pkt */
	u32	ovr;		/* RO # of oversize pkt*/
	u32	jbr;		/* RO # of jabber count */
	u32	mtue;		/* RO # of MTU error pkt*/
	u32	pok;		/* RO # of Received good pkt */
	u32	uc;		/* RO # of unicast pkt */
	u32	ppp;		/* RO # of PPP pkt */
	u32	rcrc;		/* RO (0x470),# of CRC match pkt */
};

/* TSV, Transmit Status Vector */
struct bcmgenet_tx_counters {
	struct bcmgenet_pkt_counters pkt_cnt;
	u32	pkts;		/* RO (0x4a8) Transmited pkt */
	u32	mca;		/* RO # of xmited multicast pkt */
	u32	bca;		/* RO # of xmited broadcast pkt */
	u32	pf;		/* RO # of xmited pause frame count */
	u32	cf;		/* RO # of xmited control frame count */
	u32	fcs;		/* RO # of xmited FCS error count */
	u32	ovr;		/* RO # of xmited oversize pkt */
	u32	drf;		/* RO # of xmited deferral pkt */
	u32	edf;		/* RO # of xmited Excessive deferral pkt*/
	u32	scl;		/* RO # of xmited single collision pkt */
	u32	mcl;		/* RO # of xmited multiple collision pkt*/
	u32	lcl;		/* RO # of xmited late collision pkt */
	u32	ecl;		/* RO # of xmited excessive collision pkt*/
	u32	frg;		/* RO # of xmited fragments pkt*/
	u32	ncl;		/* RO # of xmited total collision count */
	u32	jbr;		/* RO # of xmited jabber count*/
	u32	bytes;		/* RO # of xmited byte count */
	u32	pok;		/* RO # of xmited good pkt */
	u32	uc;		/* RO (0x0x4f0)# of xmited unitcast pkt */
};

struct bcmgenet_mib_counters {
	struct bcmgenet_rx_counters rx;
	struct bcmgenet_tx_counters tx;
	u32	rx_runt_cnt;
	u32	rx_runt_fcs;
	u32	rx_runt_fcs_align;
	u32	rx_runt_bytes;
	u32	rbuf_ovflow_cnt;
	u32	rbuf_err_cnt;
	u32	mdf_err_cnt;
	u32	alloc_rx_buff_failed;
	u32	rx_dma_failed;
	u32	tx_dma_failed;
};

#define UMAC_HD_BKP_CTRL		0x004
#define	 HD_FC_EN			(1 << 0)
#define  HD_FC_BKOFF_OK			(1 << 1)
#define  IPG_CONFIG_RX_SHIFT		2
#define  IPG_CONFIG_RX_MASK		0x1F

#define UMAC_CMD			0x008
#define  CMD_TX_EN			(1 << 0)
#define  CMD_RX_EN			(1 << 1)
#define  UMAC_SPEED_10			0
#define  UMAC_SPEED_100			1
#define  UMAC_SPEED_1000		2
#define  UMAC_SPEED_2500		3
#define  CMD_SPEED_SHIFT		2
#define  CMD_SPEED_MASK			3
#define  CMD_PROMISC			(1 << 4)
#define  CMD_PAD_EN			(1 << 5)
#define  CMD_CRC_FWD			(1 << 6)
#define  CMD_PAUSE_FWD			(1 << 7)
#define  CMD_RX_PAUSE_IGNORE		(1 << 8)
#define  CMD_TX_ADDR_INS		(1 << 9)
#define  CMD_HD_EN			(1 << 10)
#define  CMD_SW_RESET			(1 << 13)
#define  CMD_LCL_LOOP_EN		(1 << 15)
#define  CMD_AUTO_CONFIG		(1 << 22)
#define  CMD_CNTL_FRM_EN		(1 << 23)
#define  CMD_NO_LEN_CHK			(1 << 24)
#define  CMD_RMT_LOOP_EN		(1 << 25)
#define  CMD_PRBL_EN			(1 << 27)
#define  CMD_TX_PAUSE_IGNORE		(1 << 28)
#define  CMD_TX_RX_EN			(1 << 29)
#define  CMD_RUNT_FILTER_DIS		(1 << 30)

#define UMAC_MAC0			0x00C
#define UMAC_MAC1			0x010
#define UMAC_MAX_FRAME_LEN		0x014

#define UMAC_MODE			0x44
#define  MODE_LINK_STATUS		(1 << 5)

#define UMAC_EEE_CTRL			0x064
#define  EN_LPI_RX_PAUSE		(1 << 0)
#define  EN_LPI_TX_PFC			(1 << 1)
#define  EN_LPI_TX_PAUSE		(1 << 2)
#define  EEE_EN				(1 << 3)
#define  RX_FIFO_CHECK			(1 << 4)
#define  EEE_TX_CLK_DIS			(1 << 5)
#define  DIS_EEE_10M			(1 << 6)
#define  LP_IDLE_PREDICTION_MODE	(1 << 7)

#define UMAC_EEE_LPI_TIMER		0x068
#define UMAC_EEE_WAKE_TIMER		0x06C
#define UMAC_EEE_REF_COUNT		0x070
#define  EEE_REFERENCE_COUNT_MASK	0xffff

#define UMAC_TX_FLUSH			0x334

#define UMAC_MIB_START			0x400

#define UMAC_MDIO_CMD			0x614
#define  MDIO_START_BUSY		(1 << 29)
#define  MDIO_READ_FAIL			(1 << 28)
#define  MDIO_RD			(2 << 26)
#define  MDIO_WR			(1 << 26)
#define  MDIO_PMD_SHIFT			21
#define  MDIO_PMD_MASK			0x1F
#define  MDIO_REG_SHIFT			16
#define  MDIO_REG_MASK			0x1F

#define UMAC_RBUF_OVFL_CNT_V1		0x61C
#define RBUF_OVFL_CNT_V2		0x80
#define RBUF_OVFL_CNT_V3PLUS		0x94

#define UMAC_MPD_CTRL			0x620
#define  MPD_EN				(1 << 0)
#define  MPD_PW_EN			(1 << 27)
#define  MPD_MSEQ_LEN_SHIFT		16
#define  MPD_MSEQ_LEN_MASK		0xFF

#define UMAC_MPD_PW_MS			0x624
#define UMAC_MPD_PW_LS			0x628
#define UMAC_RBUF_ERR_CNT_V1		0x634
#define RBUF_ERR_CNT_V2			0x84
#define RBUF_ERR_CNT_V3PLUS		0x98
#define UMAC_MDF_ERR_CNT		0x638
#define UMAC_MDF_CTRL			0x650
#define UMAC_MDF_ADDR			0x654
#define UMAC_MIB_CTRL			0x580
#define  MIB_RESET_RX			(1 << 0)
#define  MIB_RESET_RUNT			(1 << 1)
#define  MIB_RESET_TX			(1 << 2)

#define RBUF_CTRL			0x00
#define  RBUF_64B_EN			(1 << 0)
#define  RBUF_ALIGN_2B			(1 << 1)
#define  RBUF_BAD_DIS			(1 << 2)

#define RBUF_STATUS			0x0C
#define  RBUF_STATUS_WOL		(1 << 0)
#define  RBUF_STATUS_MPD_INTR_ACTIVE	(1 << 1)
#define  RBUF_STATUS_ACPI_INTR_ACTIVE	(1 << 2)

#define RBUF_CHK_CTRL			0x14
#define  RBUF_RXCHK_EN			(1 << 0)
#define  RBUF_SKIP_FCS			(1 << 4)

#define RBUF_ENERGY_CTRL		0x9c
#define  RBUF_EEE_EN			(1 << 0)
#define  RBUF_PM_EN			(1 << 1)

#define RBUF_TBUF_SIZE_CTRL		0xb4

#define RBUF_HFB_CTRL_V1		0x38
#define  RBUF_HFB_FILTER_EN_SHIFT	16
#define  RBUF_HFB_FILTER_EN_MASK	0xffff0000
#define  RBUF_HFB_EN			(1 << 0)
#define  RBUF_HFB_256B			(1 << 1)
#define  RBUF_ACPI_EN			(1 << 2)

#define RBUF_HFB_LEN_V1			0x3C
#define  RBUF_FLTR_LEN_MASK		0xFF
#define  RBUF_FLTR_LEN_SHIFT		8

#define TBUF_CTRL			0x00
#define TBUF_BP_MC			0x0C
#define TBUF_ENERGY_CTRL		0x14
#define  TBUF_EEE_EN			(1 << 0)
#define  TBUF_PM_EN			(1 << 1)

#define TBUF_CTRL_V1			0x80
#define TBUF_BP_MC_V1			0xA0

#define HFB_CTRL			0x00
#define HFB_FLT_ENABLE_V3PLUS		0x04
#define HFB_FLT_LEN_V2			0x04
#define HFB_FLT_LEN_V3PLUS		0x1C

/* uniMac intrl2 registers */
#define INTRL2_CPU_STAT			0x00
#define INTRL2_CPU_SET			0x04
#define INTRL2_CPU_CLEAR		0x08
#define INTRL2_CPU_MASK_STATUS		0x0C
#define INTRL2_CPU_MASK_SET		0x10
#define INTRL2_CPU_MASK_CLEAR		0x14

/* INTRL2 instance 0 definitions */
#define UMAC_IRQ_SCB			(1 << 0)
#define UMAC_IRQ_EPHY			(1 << 1)
#define UMAC_IRQ_PHY_DET_R		(1 << 2)
#define UMAC_IRQ_PHY_DET_F		(1 << 3)
#define UMAC_IRQ_LINK_UP		(1 << 4)
#define UMAC_IRQ_LINK_DOWN		(1 << 5)
#define UMAC_IRQ_LINK_EVENT		(UMAC_IRQ_LINK_UP | UMAC_IRQ_LINK_DOWN)
#define UMAC_IRQ_UMAC			(1 << 6)
#define UMAC_IRQ_UMAC_TSV		(1 << 7)
#define UMAC_IRQ_TBUF_UNDERRUN		(1 << 8)
#define UMAC_IRQ_RBUF_OVERFLOW		(1 << 9)
#define UMAC_IRQ_HFB_SM			(1 << 10)
#define UMAC_IRQ_HFB_MM			(1 << 11)
#define UMAC_IRQ_MPD_R			(1 << 12)
#define UMAC_IRQ_RXDMA_MBDONE		(1 << 13)
#define UMAC_IRQ_RXDMA_PDONE		(1 << 14)
#define UMAC_IRQ_RXDMA_BDONE		(1 << 15)
#define UMAC_IRQ_RXDMA_DONE		UMAC_IRQ_RXDMA_MBDONE
#define UMAC_IRQ_TXDMA_MBDONE		(1 << 16)
#define UMAC_IRQ_TXDMA_PDONE		(1 << 17)
#define UMAC_IRQ_TXDMA_BDONE		(1 << 18)
#define UMAC_IRQ_TXDMA_DONE		UMAC_IRQ_TXDMA_MBDONE

/* Only valid for GENETv3+ */
#define UMAC_IRQ_MDIO_DONE		(1 << 23)
#define UMAC_IRQ_MDIO_ERROR		(1 << 24)

/* INTRL2 instance 1 definitions */
#define UMAC_IRQ1_TX_INTR_MASK		0xFFFF
#define UMAC_IRQ1_RX_INTR_MASK		0xFFFF
#define UMAC_IRQ1_RX_INTR_SHIFT		16

/* Register block offsets */
#define GENET_SYS_OFF			0x0000
#define GENET_GR_BRIDGE_OFF		0x0040
#define GENET_EXT_OFF			0x0080
#define GENET_INTRL2_0_OFF		0x0200
#define GENET_INTRL2_1_OFF		0x0240
#define GENET_RBUF_OFF			0x0300
#define GENET_UMAC_OFF			0x0800

/* SYS block offsets and register definitions */
#define SYS_REV_CTRL			0x00
#define SYS_PORT_CTRL			0x04
#define  PORT_MODE_INT_EPHY		0
#define  PORT_MODE_INT_GPHY		1
#define  PORT_MODE_EXT_EPHY		2
#define  PORT_MODE_EXT_GPHY		3
#define  PORT_MODE_EXT_RVMII_25		(4 | BIT(4))
#define  PORT_MODE_EXT_RVMII_50		4
#define  LED_ACT_SOURCE_MAC		(1 << 9)

#define SYS_RBUF_FLUSH_CTRL		0x08
#define SYS_TBUF_FLUSH_CTRL		0x0C
#define RBUF_FLUSH_CTRL_V1		0x04

/* Ext block register offsets and definitions */
#define EXT_EXT_PWR_MGMT		0x00
#define  EXT_PWR_DOWN_BIAS		(1 << 0)
#define  EXT_PWR_DOWN_DLL		(1 << 1)
#define  EXT_PWR_DOWN_PHY		(1 << 2)
#define  EXT_PWR_DN_EN_LD		(1 << 3)
#define  EXT_ENERGY_DET			(1 << 4)
#define  EXT_IDDQ_FROM_PHY		(1 << 5)
#define  EXT_IDDQ_GLBL_PWR		(1 << 7)
#define  EXT_PHY_RESET			(1 << 8)
#define  EXT_ENERGY_DET_MASK		(1 << 12)
#define  EXT_PWR_DOWN_PHY_TX		(1 << 16)
#define  EXT_PWR_DOWN_PHY_RX		(1 << 17)
#define  EXT_PWR_DOWN_PHY_SD		(1 << 18)
#define  EXT_PWR_DOWN_PHY_RD		(1 << 19)
#define  EXT_PWR_DOWN_PHY_EN		(1 << 20)

#define EXT_RGMII_OOB_CTRL		0x0C
#define  RGMII_LINK			(1 << 4)
#define  OOB_DISABLE			(1 << 5)
#define  RGMII_MODE_EN			(1 << 6)
#define  ID_MODE_DIS			(1 << 16)

#define EXT_GPHY_CTRL			0x1C
#define  EXT_CFG_IDDQ_BIAS		(1 << 0)
#define  EXT_CFG_PWR_DOWN		(1 << 1)
#define  EXT_CK25_DIS			(1 << 4)
#define  EXT_GPHY_RESET			(1 << 5)

/* DMA rings size */
#define DMA_RING_SIZE			(0x40)
#define DMA_RINGS_SIZE			(DMA_RING_SIZE * (DESC_INDEX + 1))

/* DMA registers common definitions */
#define DMA_RW_POINTER_MASK		0x1FF
#define DMA_P_INDEX_DISCARD_CNT_MASK	0xFFFF
#define DMA_P_INDEX_DISCARD_CNT_SHIFT	16
#define DMA_BUFFER_DONE_CNT_MASK	0xFFFF
#define DMA_BUFFER_DONE_CNT_SHIFT	16
#define DMA_P_INDEX_MASK		0xFFFF
#define DMA_C_INDEX_MASK		0xFFFF

/* DMA ring size register */
#define DMA_RING_SIZE_MASK		0xFFFF
#define DMA_RING_SIZE_SHIFT		16
#define DMA_RING_BUFFER_SIZE_MASK	0xFFFF

/* DMA interrupt threshold register */
#define DMA_INTR_THRESHOLD_MASK		0x01FF

/* DMA XON/XOFF register */
#define DMA_XON_THREHOLD_MASK		0xFFFF
#define DMA_XOFF_THRESHOLD_MASK		0xFFFF
#define DMA_XOFF_THRESHOLD_SHIFT	16

/* DMA flow period register */
#define DMA_FLOW_PERIOD_MASK		0xFFFF
#define DMA_MAX_PKT_SIZE_MASK		0xFFFF
#define DMA_MAX_PKT_SIZE_SHIFT		16


/* DMA control register */
#define DMA_EN				(1 << 0)
#define DMA_RING_BUF_EN_SHIFT		0x01
#define DMA_RING_BUF_EN_MASK		0xFFFF
#define DMA_TSB_SWAP_EN			(1 << 20)

/* DMA status register */
#define DMA_DISABLED			(1 << 0)
#define DMA_DESC_RAM_INIT_BUSY		(1 << 1)

/* DMA SCB burst size register */
#define DMA_SCB_BURST_SIZE_MASK		0x1F

/* DMA activity vector register */
#define DMA_ACTIVITY_VECTOR_MASK	0x1FFFF

/* DMA backpressure mask register */
#define DMA_BACKPRESSURE_MASK		0x1FFFF
#define DMA_PFC_ENABLE			(1 << 31)

/* DMA backpressure status register */
#define DMA_BACKPRESSURE_STATUS_MASK	0x1FFFF

/* DMA override register */
#define DMA_LITTLE_ENDIAN_MODE		(1 << 0)
#define DMA_REGISTER_MODE		(1 << 1)

/* DMA timeout register */
#define DMA_TIMEOUT_MASK		0xFFFF
#define DMA_TIMEOUT_VAL			5000	/* micro seconds */

/* TDMA rate limiting control register */
#define DMA_RATE_LIMIT_EN_MASK		0xFFFF

/* TDMA arbitration control register */
#define DMA_ARBITER_MODE_MASK		0x03
#define DMA_RING_BUF_PRIORITY_MASK	0x1F
#define DMA_RING_BUF_PRIORITY_SHIFT	5
#define DMA_PRIO_REG_INDEX(q)		((q) / 6)
#define DMA_PRIO_REG_SHIFT(q)		(((q) % 6) * DMA_RING_BUF_PRIORITY_SHIFT)
#define DMA_RATE_ADJ_MASK		0xFF

/* Tx/Rx Dma Descriptor common bits*/
#define DMA_BUFLENGTH_MASK		0x0fff
#define DMA_BUFLENGTH_SHIFT		16
#define DMA_OWN				0x8000
#define DMA_EOP				0x4000
#define DMA_SOP				0x2000
#define DMA_WRAP			0x1000
/* Tx specific Dma descriptor bits */
#define DMA_TX_UNDERRUN			0x0200
#define DMA_TX_APPEND_CRC		0x0040
#define DMA_TX_OW_CRC			0x0020
#define DMA_TX_DO_CSUM			0x0010
#define DMA_TX_QTAG_SHIFT		7

/* Rx Specific Dma descriptor bits */
#define DMA_RX_CHK_V3PLUS		0x8000
#define DMA_RX_CHK_V12			0x1000
#define DMA_RX_BRDCAST			0x0040
#define DMA_RX_MULT			0x0020
#define DMA_RX_LG			0x0010
#define DMA_RX_NO			0x0008
#define DMA_RX_RXER			0x0004
#define DMA_RX_CRC_ERROR		0x0002
#define DMA_RX_OV			0x0001
#define DMA_RX_FI_MASK			0x001F
#define DMA_RX_FI_SHIFT			0x0007
#define DMA_DESC_ALLOC_MASK		0x00FF

#define DMA_ARBITER_RR			0x00
#define DMA_ARBITER_WRR			0x01
#define DMA_ARBITER_SP			0x02

struct enet_cb {
	struct sk_buff      *skb;
	void __iomem *bd_addr;
	DEFINE_DMA_UNMAP_ADDR(dma_addr);
	DEFINE_DMA_UNMAP_LEN(dma_len);
};

/* power management mode */
enum bcmgenet_power_mode {
	GENET_POWER_CABLE_SENSE = 0,
	GENET_POWER_PASSIVE,
	GENET_POWER_WOL_MAGIC,
};

struct bcmgenet_priv;

/* We support both runtime GENET detection and compile-time
 * to optimize code-paths for a given hardware
 */
enum bcmgenet_version {
	GENET_V1 = 1,
	GENET_V2,
	GENET_V3,
	GENET_V4,
	GENET_V5
};

#define GENET_IS_V1(p)	((p)->version == GENET_V1)
#define GENET_IS_V2(p)	((p)->version == GENET_V2)
#define GENET_IS_V3(p)	((p)->version == GENET_V3)
#define GENET_IS_V4(p)	((p)->version == GENET_V4)
#define GENET_IS_V5(p)	((p)->version == GENET_V5)

/* Hardware flags */
#define GENET_HAS_40BITS	(1 << 0)
#define GENET_HAS_EXT		(1 << 1)
#define GENET_HAS_MDIO_INTR	(1 << 2)
#define GENET_HAS_MOCA_LINK_DET	(1 << 3)

/* BCMGENET hardware parameters, keep this structure nicely aligned
 * since it is going to be used in hot paths
 */
struct bcmgenet_hw_params {
	u8		tx_queues;
	u8		tx_bds_per_q;
	u8		rx_queues;
	u8		rx_bds_per_q;
	u8		bp_in_en_shift;
	u32		bp_in_mask;
	u8		hfb_filter_cnt;
	u8		hfb_filter_size;
	u8		qtag_mask;
	u16		tbuf_offset;
	u32		hfb_offset;
	u32		hfb_reg_offset;
	u32		rdma_offset;
	u32		tdma_offset;
	u32		words_per_bd;
	u32		flags;
};

struct bcmgenet_skb_cb {
	struct enet_cb *first_cb;	/* First control block of SKB */
	struct enet_cb *last_cb;	/* Last control block of SKB */
	unsigned int bytes_sent;	/* bytes on the wire (no TSB) */
};

#define GENET_CB(skb)	((struct bcmgenet_skb_cb *)((skb)->cb))

struct bcmgenet_tx_ring {
	spinlock_t	lock;		/* ring lock */
	struct napi_struct napi;	/* NAPI per tx queue */
	unsigned long	packets;
	unsigned long	bytes;
	unsigned int	index;		/* ring index */
	unsigned int	queue;		/* queue index */
	struct enet_cb	*cbs;		/* tx ring buffer control block*/
	unsigned int	size;		/* size of each tx ring */
	unsigned int    clean_ptr;      /* Tx ring clean pointer */
	unsigned int	c_index;	/* last consumer index of each ring*/
	unsigned int	free_bds;	/* # of free bds for each ring */
	unsigned int	write_ptr;	/* Tx ring write pointer SW copy */
	unsigned int	prod_index;	/* Tx ring producer index SW copy */
	unsigned int	cb_ptr;		/* Tx ring initial CB ptr */
	unsigned int	end_ptr;	/* Tx ring end CB ptr */
	void (*int_enable)(struct bcmgenet_tx_ring *);
	void (*int_disable)(struct bcmgenet_tx_ring *);
	struct bcmgenet_priv *priv;
};

struct bcmgenet_net_dim {
	u16		use_dim;
	u16		event_ctr;
	unsigned long	packets;
	unsigned long	bytes;
	struct dim	dim;
};

struct bcmgenet_rx_ring {
	struct napi_struct napi;	/* Rx NAPI struct */
	unsigned long	bytes;
	unsigned long	packets;
	unsigned long	errors;
	unsigned long	dropped;
	unsigned int	index;		/* Rx ring index */
	struct enet_cb	*cbs;		/* Rx ring buffer control block */
	unsigned int	size;		/* Rx ring size */
	unsigned int	c_index;	/* Rx last consumer index */
	unsigned int	read_ptr;	/* Rx ring read pointer */
	unsigned int	cb_ptr;		/* Rx ring initial CB ptr */
	unsigned int	end_ptr;	/* Rx ring end CB ptr */
	unsigned int	old_discards;
	struct bcmgenet_net_dim dim;
	u32		rx_max_coalesced_frames;
	u32		rx_coalesce_usecs;
	void (*int_enable)(struct bcmgenet_rx_ring *);
	void (*int_disable)(struct bcmgenet_rx_ring *);
	struct bcmgenet_priv *priv;
};

/* device context */
struct bcmgenet_priv {
	void __iomem *base;
	enum bcmgenet_version version;
	struct net_device *dev;

	/* transmit variables */
	void __iomem *tx_bds;
	struct enet_cb *tx_cbs;
	unsigned int num_tx_bds;

	struct bcmgenet_tx_ring tx_rings[DESC_INDEX + 1];

	/* receive variables */
	void __iomem *rx_bds;
	struct enet_cb *rx_cbs;
	unsigned int num_rx_bds;
	unsigned int rx_buf_len;

	struct bcmgenet_rx_ring rx_rings[DESC_INDEX + 1];

	/* other misc variables */
	struct bcmgenet_hw_params *hw_params;

	/* MDIO bus variables */
	wait_queue_head_t wq;
	bool internal_phy;
	struct device_node *phy_dn;
	struct device_node *mdio_dn;
	struct mii_bus *mii_bus;
	u16 gphy_rev;
	struct clk *clk_eee;
	bool clk_eee_enabled;

	/* PHY device variables */
	int old_link;
	int old_speed;
	int old_duplex;
	int old_pause;
	phy_interface_t phy_interface;
	int phy_addr;
	int ext_phy;

	/* Interrupt variables */
	struct work_struct bcmgenet_irq_work;
	int irq0;
	int irq1;
	int wol_irq;
	bool wol_irq_disabled;

	/* shared status */
	spinlock_t lock;
	unsigned int irq0_stat;

	/* HW descriptors/checksum variables */
	bool desc_64b_en;
	bool desc_rxchk_en;
	bool crc_fwd_en;

	unsigned int dma_rx_chk_bit;

	u32 msg_enable;

	struct clk *clk;
	struct platform_device *pdev;
	struct platform_device *mii_pdev;

	/* WOL */
	struct clk *clk_wol;
	u32 wolopts;

	struct bcmgenet_mib_counters mib;

	struct ethtool_eee eee;
};

#define GENET_IO_MACRO(name, offset)					\
static inline u32 bcmgenet_##name##_readl(struct bcmgenet_priv *priv,	\
					u32 off)			\
{									\
	/* MIPS chips strapped for BE will automagically configure the	\
	 * peripheral registers for CPU-native byte order.		\
	 */								\
	if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) \
		return __raw_readl(priv->base + offset + off);		\
	else								\
		return readl_relaxed(priv->base + offset + off);	\
}									\
static inline void bcmgenet_##name##_writel(struct bcmgenet_priv *priv,	\
					u32 val, u32 off)		\
{									\
	if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) \
		__raw_writel(val, priv->base + offset + off);		\
	else								\
		writel_relaxed(val, priv->base + offset + off);		\
}

GENET_IO_MACRO(ext, GENET_EXT_OFF);
GENET_IO_MACRO(umac, GENET_UMAC_OFF);
GENET_IO_MACRO(sys, GENET_SYS_OFF);

/* interrupt l2 registers accessors */
GENET_IO_MACRO(intrl2_0, GENET_INTRL2_0_OFF);
GENET_IO_MACRO(intrl2_1, GENET_INTRL2_1_OFF);

/* HFB register accessors  */
GENET_IO_MACRO(hfb, priv->hw_params->hfb_offset);

/* GENET v2+ HFB control and filter len helpers */
GENET_IO_MACRO(hfb_reg, priv->hw_params->hfb_reg_offset);

/* RBUF register accessors */
GENET_IO_MACRO(rbuf, GENET_RBUF_OFF);

/* MDIO routines */
int bcmgenet_mii_init(struct net_device *dev);
int bcmgenet_mii_config(struct net_device *dev, bool init);
int bcmgenet_mii_probe(struct net_device *dev);
void bcmgenet_mii_exit(struct net_device *dev);
void bcmgenet_phy_power_set(struct net_device *dev, bool enable);
void bcmgenet_mii_setup(struct net_device *dev);

/* Wake-on-LAN routines */
void bcmgenet_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol);
int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol);
int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv,
				enum bcmgenet_power_mode mode);
void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv,
			       enum bcmgenet_power_mode mode);

#endif /* __BCMGENET_H__ */