summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/freescale/fman/fman_tgec.c
blob: 4b0f3a50b2939aa31fc6274235e263f1277461fb (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
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
/*
 * Copyright 2008-2015 Freescale Semiconductor Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Freescale Semiconductor nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 *
 * ALTERNATIVELY, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") as published by the Free Software
 * Foundation, either version 2 of that License or (at your option) any
 * later version.
 *
 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "fman_tgec.h"
#include "fman.h"

#include <linux/slab.h>
#include <linux/bitrev.h>
#include <linux/io.h>
#include <linux/crc32.h>

/* Transmit Inter-Packet Gap Length Register (TX_IPG_LENGTH) */
#define TGEC_TX_IPG_LENGTH_MASK	0x000003ff

/* Command and Configuration Register (COMMAND_CONFIG) */
#define CMD_CFG_NO_LEN_CHK		0x00020000
#define CMD_CFG_PAUSE_IGNORE		0x00000100
#define CMF_CFG_CRC_FWD			0x00000040
#define CMD_CFG_PROMIS_EN		0x00000010
#define CMD_CFG_RX_EN			0x00000002
#define CMD_CFG_TX_EN			0x00000001

/* Interrupt Mask Register (IMASK) */
#define TGEC_IMASK_MDIO_SCAN_EVENT	0x00010000
#define TGEC_IMASK_MDIO_CMD_CMPL	0x00008000
#define TGEC_IMASK_REM_FAULT		0x00004000
#define TGEC_IMASK_LOC_FAULT		0x00002000
#define TGEC_IMASK_TX_ECC_ER		0x00001000
#define TGEC_IMASK_TX_FIFO_UNFL	0x00000800
#define TGEC_IMASK_TX_FIFO_OVFL	0x00000400
#define TGEC_IMASK_TX_ER		0x00000200
#define TGEC_IMASK_RX_FIFO_OVFL	0x00000100
#define TGEC_IMASK_RX_ECC_ER		0x00000080
#define TGEC_IMASK_RX_JAB_FRM		0x00000040
#define TGEC_IMASK_RX_OVRSZ_FRM	0x00000020
#define TGEC_IMASK_RX_RUNT_FRM		0x00000010
#define TGEC_IMASK_RX_FRAG_FRM		0x00000008
#define TGEC_IMASK_RX_LEN_ER		0x00000004
#define TGEC_IMASK_RX_CRC_ER		0x00000002
#define TGEC_IMASK_RX_ALIGN_ER		0x00000001

/* Hashtable Control Register (HASHTABLE_CTRL) */
#define TGEC_HASH_MCAST_SHIFT		23
#define TGEC_HASH_MCAST_EN		0x00000200
#define TGEC_HASH_ADR_MSK		0x000001ff

#define DEFAULT_TX_IPG_LENGTH			12
#define DEFAULT_MAX_FRAME_LENGTH		0x600
#define DEFAULT_PAUSE_QUANT			0xf000

/* number of pattern match registers (entries) */
#define TGEC_NUM_OF_PADDRS          1

/* Group address bit indication */
#define GROUP_ADDRESS               0x0000010000000000LL

/* Hash table size (= 32 bits*8 regs) */
#define TGEC_HASH_TABLE_SIZE             512

/* tGEC memory map */
struct tgec_regs {
	u32 tgec_id;		/* 0x000 Controller ID */
	u32 reserved001[1];	/* 0x004 */
	u32 command_config;	/* 0x008 Control and configuration */
	u32 mac_addr_0;		/* 0x00c Lower 32 bits of the MAC adr */
	u32 mac_addr_1;		/* 0x010 Upper 16 bits of the MAC adr */
	u32 maxfrm;		/* 0x014 Maximum frame length */
	u32 pause_quant;	/* 0x018 Pause quanta */
	u32 rx_fifo_sections;	/* 0x01c  */
	u32 tx_fifo_sections;	/* 0x020  */
	u32 rx_fifo_almost_f_e;	/* 0x024  */
	u32 tx_fifo_almost_f_e;	/* 0x028  */
	u32 hashtable_ctrl;	/* 0x02c Hash table control */
	u32 mdio_cfg_status;	/* 0x030  */
	u32 mdio_command;	/* 0x034  */
	u32 mdio_data;		/* 0x038  */
	u32 mdio_regaddr;	/* 0x03c  */
	u32 status;		/* 0x040  */
	u32 tx_ipg_len;		/* 0x044 Transmitter inter-packet-gap */
	u32 mac_addr_2;		/* 0x048 Lower 32 bits of 2nd MAC adr */
	u32 mac_addr_3;		/* 0x04c Upper 16 bits of 2nd MAC adr */
	u32 rx_fifo_ptr_rd;	/* 0x050  */
	u32 rx_fifo_ptr_wr;	/* 0x054  */
	u32 tx_fifo_ptr_rd;	/* 0x058  */
	u32 tx_fifo_ptr_wr;	/* 0x05c  */
	u32 imask;		/* 0x060 Interrupt mask */
	u32 ievent;		/* 0x064 Interrupt event */
	u32 udp_port;		/* 0x068 Defines a UDP Port number */
	u32 type_1588v2;	/* 0x06c Type field for 1588v2 */
	u32 reserved070[4];	/* 0x070 */
	/* 10Ge Statistics Counter */
	u32 tfrm_u;		/* 80 aFramesTransmittedOK */
	u32 tfrm_l;		/* 84 aFramesTransmittedOK */
	u32 rfrm_u;		/* 88 aFramesReceivedOK */
	u32 rfrm_l;		/* 8c aFramesReceivedOK */
	u32 rfcs_u;		/* 90 aFrameCheckSequenceErrors */
	u32 rfcs_l;		/* 94 aFrameCheckSequenceErrors */
	u32 raln_u;		/* 98 aAlignmentErrors */
	u32 raln_l;		/* 9c aAlignmentErrors */
	u32 txpf_u;		/* A0 aPAUSEMACCtrlFramesTransmitted */
	u32 txpf_l;		/* A4 aPAUSEMACCtrlFramesTransmitted */
	u32 rxpf_u;		/* A8 aPAUSEMACCtrlFramesReceived */
	u32 rxpf_l;		/* Ac aPAUSEMACCtrlFramesReceived */
	u32 rlong_u;		/* B0 aFrameTooLongErrors */
	u32 rlong_l;		/* B4 aFrameTooLongErrors */
	u32 rflr_u;		/* B8 aInRangeLengthErrors */
	u32 rflr_l;		/* Bc aInRangeLengthErrors */
	u32 tvlan_u;		/* C0 VLANTransmittedOK */
	u32 tvlan_l;		/* C4 VLANTransmittedOK */
	u32 rvlan_u;		/* C8 VLANReceivedOK */
	u32 rvlan_l;		/* Cc VLANReceivedOK */
	u32 toct_u;		/* D0 if_out_octets */
	u32 toct_l;		/* D4 if_out_octets */
	u32 roct_u;		/* D8 if_in_octets */
	u32 roct_l;		/* Dc if_in_octets */
	u32 ruca_u;		/* E0 if_in_ucast_pkts */
	u32 ruca_l;		/* E4 if_in_ucast_pkts */
	u32 rmca_u;		/* E8 ifInMulticastPkts */
	u32 rmca_l;		/* Ec ifInMulticastPkts */
	u32 rbca_u;		/* F0 ifInBroadcastPkts */
	u32 rbca_l;		/* F4 ifInBroadcastPkts */
	u32 terr_u;		/* F8 if_out_errors */
	u32 terr_l;		/* Fc if_out_errors */
	u32 reserved100[2];	/* 100-108 */
	u32 tuca_u;		/* 108 if_out_ucast_pkts */
	u32 tuca_l;		/* 10c if_out_ucast_pkts */
	u32 tmca_u;		/* 110 ifOutMulticastPkts */
	u32 tmca_l;		/* 114 ifOutMulticastPkts */
	u32 tbca_u;		/* 118 ifOutBroadcastPkts */
	u32 tbca_l;		/* 11c ifOutBroadcastPkts */
	u32 rdrp_u;		/* 120 etherStatsDropEvents */
	u32 rdrp_l;		/* 124 etherStatsDropEvents */
	u32 reoct_u;		/* 128 etherStatsOctets */
	u32 reoct_l;		/* 12c etherStatsOctets */
	u32 rpkt_u;		/* 130 etherStatsPkts */
	u32 rpkt_l;		/* 134 etherStatsPkts */
	u32 trund_u;		/* 138 etherStatsUndersizePkts */
	u32 trund_l;		/* 13c etherStatsUndersizePkts */
	u32 r64_u;		/* 140 etherStatsPkts64Octets */
	u32 r64_l;		/* 144 etherStatsPkts64Octets */
	u32 r127_u;		/* 148 etherStatsPkts65to127Octets */
	u32 r127_l;		/* 14c etherStatsPkts65to127Octets */
	u32 r255_u;		/* 150 etherStatsPkts128to255Octets */
	u32 r255_l;		/* 154 etherStatsPkts128to255Octets */
	u32 r511_u;		/* 158 etherStatsPkts256to511Octets */
	u32 r511_l;		/* 15c etherStatsPkts256to511Octets */
	u32 r1023_u;		/* 160 etherStatsPkts512to1023Octets */
	u32 r1023_l;		/* 164 etherStatsPkts512to1023Octets */
	u32 r1518_u;		/* 168 etherStatsPkts1024to1518Octets */
	u32 r1518_l;		/* 16c etherStatsPkts1024to1518Octets */
	u32 r1519x_u;		/* 170 etherStatsPkts1519toX */
	u32 r1519x_l;		/* 174 etherStatsPkts1519toX */
	u32 trovr_u;		/* 178 etherStatsOversizePkts */
	u32 trovr_l;		/* 17c etherStatsOversizePkts */
	u32 trjbr_u;		/* 180 etherStatsJabbers */
	u32 trjbr_l;		/* 184 etherStatsJabbers */
	u32 trfrg_u;		/* 188 etherStatsFragments */
	u32 trfrg_l;		/* 18C etherStatsFragments */
	u32 rerr_u;		/* 190 if_in_errors */
	u32 rerr_l;		/* 194 if_in_errors */
};

struct tgec_cfg {
	bool pause_ignore;
	bool promiscuous_mode_enable;
	u16 max_frame_length;
	u16 pause_quant;
	u32 tx_ipg_length;
};

struct fman_mac {
	/* Pointer to the memory mapped registers. */
	struct tgec_regs __iomem *regs;
	/* MAC address of device; */
	u64 addr;
	u16 max_speed;
	void *dev_id; /* device cookie used by the exception cbs */
	fman_mac_exception_cb *exception_cb;
	fman_mac_exception_cb *event_cb;
	/* pointer to driver's global address hash table  */
	struct eth_hash_t *multicast_addr_hash;
	/* pointer to driver's individual address hash table  */
	struct eth_hash_t *unicast_addr_hash;
	u8 mac_id;
	u32 exceptions;
	struct tgec_cfg *cfg;
	void *fm;
	struct fman_rev_info fm_rev_info;
};

static void set_mac_address(struct tgec_regs __iomem *regs, u8 *adr)
{
	u32 tmp0, tmp1;

	tmp0 = (u32)(adr[0] | adr[1] << 8 | adr[2] << 16 | adr[3] << 24);
	tmp1 = (u32)(adr[4] | adr[5] << 8);
	iowrite32be(tmp0, &regs->mac_addr_0);
	iowrite32be(tmp1, &regs->mac_addr_1);
}

static void set_dflts(struct tgec_cfg *cfg)
{
	cfg->promiscuous_mode_enable = false;
	cfg->pause_ignore = false;
	cfg->tx_ipg_length = DEFAULT_TX_IPG_LENGTH;
	cfg->max_frame_length = DEFAULT_MAX_FRAME_LENGTH;
	cfg->pause_quant = DEFAULT_PAUSE_QUANT;
}

static int init(struct tgec_regs __iomem *regs, struct tgec_cfg *cfg,
		u32 exception_mask)
{
	u32 tmp;

	/* Config */
	tmp = CMF_CFG_CRC_FWD;
	if (cfg->promiscuous_mode_enable)
		tmp |= CMD_CFG_PROMIS_EN;
	if (cfg->pause_ignore)
		tmp |= CMD_CFG_PAUSE_IGNORE;
	/* Payload length check disable */
	tmp |= CMD_CFG_NO_LEN_CHK;
	iowrite32be(tmp, &regs->command_config);

	/* Max Frame Length */
	iowrite32be((u32)cfg->max_frame_length, &regs->maxfrm);
	/* Pause Time */
	iowrite32be(cfg->pause_quant, &regs->pause_quant);

	/* clear all pending events and set-up interrupts */
	iowrite32be(0xffffffff, &regs->ievent);
	iowrite32be(ioread32be(&regs->imask) | exception_mask, &regs->imask);

	return 0;
}

static int check_init_parameters(struct fman_mac *tgec)
{
	if (tgec->max_speed < SPEED_10000) {
		pr_err("10G MAC driver only support 10G speed\n");
		return -EINVAL;
	}
	if (tgec->addr == 0) {
		pr_err("Ethernet 10G MAC Must have valid MAC Address\n");
		return -EINVAL;
	}
	if (!tgec->exception_cb) {
		pr_err("uninitialized exception_cb\n");
		return -EINVAL;
	}
	if (!tgec->event_cb) {
		pr_err("uninitialized event_cb\n");
		return -EINVAL;
	}

	return 0;
}

static int get_exception_flag(enum fman_mac_exceptions exception)
{
	u32 bit_mask;

	switch (exception) {
	case FM_MAC_EX_10G_MDIO_SCAN_EVENT:
		bit_mask = TGEC_IMASK_MDIO_SCAN_EVENT;
		break;
	case FM_MAC_EX_10G_MDIO_CMD_CMPL:
		bit_mask = TGEC_IMASK_MDIO_CMD_CMPL;
		break;
	case FM_MAC_EX_10G_REM_FAULT:
		bit_mask = TGEC_IMASK_REM_FAULT;
		break;
	case FM_MAC_EX_10G_LOC_FAULT:
		bit_mask = TGEC_IMASK_LOC_FAULT;
		break;
	case FM_MAC_EX_10G_TX_ECC_ER:
		bit_mask = TGEC_IMASK_TX_ECC_ER;
		break;
	case FM_MAC_EX_10G_TX_FIFO_UNFL:
		bit_mask = TGEC_IMASK_TX_FIFO_UNFL;
		break;
	case FM_MAC_EX_10G_TX_FIFO_OVFL:
		bit_mask = TGEC_IMASK_TX_FIFO_OVFL;
		break;
	case FM_MAC_EX_10G_TX_ER:
		bit_mask = TGEC_IMASK_TX_ER;
		break;
	case FM_MAC_EX_10G_RX_FIFO_OVFL:
		bit_mask = TGEC_IMASK_RX_FIFO_OVFL;
		break;
	case FM_MAC_EX_10G_RX_ECC_ER:
		bit_mask = TGEC_IMASK_RX_ECC_ER;
		break;
	case FM_MAC_EX_10G_RX_JAB_FRM:
		bit_mask = TGEC_IMASK_RX_JAB_FRM;
		break;
	case FM_MAC_EX_10G_RX_OVRSZ_FRM:
		bit_mask = TGEC_IMASK_RX_OVRSZ_FRM;
		break;
	case FM_MAC_EX_10G_RX_RUNT_FRM:
		bit_mask = TGEC_IMASK_RX_RUNT_FRM;
		break;
	case FM_MAC_EX_10G_RX_FRAG_FRM:
		bit_mask = TGEC_IMASK_RX_FRAG_FRM;
		break;
	case FM_MAC_EX_10G_RX_LEN_ER:
		bit_mask = TGEC_IMASK_RX_LEN_ER;
		break;
	case FM_MAC_EX_10G_RX_CRC_ER:
		bit_mask = TGEC_IMASK_RX_CRC_ER;
		break;
	case FM_MAC_EX_10G_RX_ALIGN_ER:
		bit_mask = TGEC_IMASK_RX_ALIGN_ER;
		break;
	default:
		bit_mask = 0;
		break;
	}

	return bit_mask;
}

static void tgec_err_exception(void *handle)
{
	struct fman_mac *tgec = (struct fman_mac *)handle;
	struct tgec_regs __iomem *regs = tgec->regs;
	u32 event;

	/* do not handle MDIO events */
	event = ioread32be(&regs->ievent) &
			   ~(TGEC_IMASK_MDIO_SCAN_EVENT |
			   TGEC_IMASK_MDIO_CMD_CMPL);

	event &= ioread32be(&regs->imask);

	iowrite32be(event, &regs->ievent);

	if (event & TGEC_IMASK_REM_FAULT)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_REM_FAULT);
	if (event & TGEC_IMASK_LOC_FAULT)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_LOC_FAULT);
	if (event & TGEC_IMASK_TX_ECC_ER)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_TX_ECC_ER);
	if (event & TGEC_IMASK_TX_FIFO_UNFL)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_TX_FIFO_UNFL);
	if (event & TGEC_IMASK_TX_FIFO_OVFL)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_TX_FIFO_OVFL);
	if (event & TGEC_IMASK_TX_ER)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_TX_ER);
	if (event & TGEC_IMASK_RX_FIFO_OVFL)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_FIFO_OVFL);
	if (event & TGEC_IMASK_RX_ECC_ER)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_ECC_ER);
	if (event & TGEC_IMASK_RX_JAB_FRM)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_JAB_FRM);
	if (event & TGEC_IMASK_RX_OVRSZ_FRM)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_OVRSZ_FRM);
	if (event & TGEC_IMASK_RX_RUNT_FRM)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_RUNT_FRM);
	if (event & TGEC_IMASK_RX_FRAG_FRM)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_FRAG_FRM);
	if (event & TGEC_IMASK_RX_LEN_ER)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_LEN_ER);
	if (event & TGEC_IMASK_RX_CRC_ER)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_CRC_ER);
	if (event & TGEC_IMASK_RX_ALIGN_ER)
		tgec->exception_cb(tgec->dev_id, FM_MAC_EX_10G_RX_ALIGN_ER);
}

static void free_init_resources(struct fman_mac *tgec)
{
	fman_unregister_intr(tgec->fm, FMAN_MOD_MAC, tgec->mac_id,
			     FMAN_INTR_TYPE_ERR);

	/* release the driver's group hash table */
	free_hash_table(tgec->multicast_addr_hash);
	tgec->multicast_addr_hash = NULL;

	/* release the driver's individual hash table */
	free_hash_table(tgec->unicast_addr_hash);
	tgec->unicast_addr_hash = NULL;
}

static bool is_init_done(struct tgec_cfg *cfg)
{
	/* Checks if tGEC driver parameters were initialized */
	if (!cfg)
		return true;

	return false;
}

int tgec_enable(struct fman_mac *tgec, enum comm_mode mode)
{
	struct tgec_regs __iomem *regs = tgec->regs;
	u32 tmp;

	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	tmp = ioread32be(&regs->command_config);
	if (mode & COMM_MODE_RX)
		tmp |= CMD_CFG_RX_EN;
	if (mode & COMM_MODE_TX)
		tmp |= CMD_CFG_TX_EN;
	iowrite32be(tmp, &regs->command_config);

	return 0;
}

int tgec_disable(struct fman_mac *tgec, enum comm_mode mode)
{
	struct tgec_regs __iomem *regs = tgec->regs;
	u32 tmp;

	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	tmp = ioread32be(&regs->command_config);
	if (mode & COMM_MODE_RX)
		tmp &= ~CMD_CFG_RX_EN;
	if (mode & COMM_MODE_TX)
		tmp &= ~CMD_CFG_TX_EN;
	iowrite32be(tmp, &regs->command_config);

	return 0;
}

int tgec_set_promiscuous(struct fman_mac *tgec, bool new_val)
{
	struct tgec_regs __iomem *regs = tgec->regs;
	u32 tmp;

	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	tmp = ioread32be(&regs->command_config);
	if (new_val)
		tmp |= CMD_CFG_PROMIS_EN;
	else
		tmp &= ~CMD_CFG_PROMIS_EN;
	iowrite32be(tmp, &regs->command_config);

	return 0;
}

int tgec_cfg_max_frame_len(struct fman_mac *tgec, u16 new_val)
{
	if (is_init_done(tgec->cfg))
		return -EINVAL;

	tgec->cfg->max_frame_length = new_val;

	return 0;
}

int tgec_set_tx_pause_frames(struct fman_mac *tgec, u8 __maybe_unused priority,
			     u16 pause_time, u16 __maybe_unused thresh_time)
{
	struct tgec_regs __iomem *regs = tgec->regs;

	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	iowrite32be((u32)pause_time, &regs->pause_quant);

	return 0;
}

int tgec_accept_rx_pause_frames(struct fman_mac *tgec, bool en)
{
	struct tgec_regs __iomem *regs = tgec->regs;
	u32 tmp;

	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	tmp = ioread32be(&regs->command_config);
	if (!en)
		tmp |= CMD_CFG_PAUSE_IGNORE;
	else
		tmp &= ~CMD_CFG_PAUSE_IGNORE;
	iowrite32be(tmp, &regs->command_config);

	return 0;
}

int tgec_modify_mac_address(struct fman_mac *tgec, enet_addr_t *p_enet_addr)
{
	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	tgec->addr = ENET_ADDR_TO_UINT64(*p_enet_addr);
	set_mac_address(tgec->regs, (u8 *)(*p_enet_addr));

	return 0;
}

int tgec_add_hash_mac_address(struct fman_mac *tgec, enet_addr_t *eth_addr)
{
	struct tgec_regs __iomem *regs = tgec->regs;
	struct eth_hash_entry *hash_entry;
	u32 crc = 0xFFFFFFFF, hash;
	u64 addr;

	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	addr = ENET_ADDR_TO_UINT64(*eth_addr);

	if (!(addr & GROUP_ADDRESS)) {
		/* Unicast addresses not supported in hash */
		pr_err("Unicast Address\n");
		return -EINVAL;
	}
	/* CRC calculation */
	crc = crc32_le(crc, (u8 *)eth_addr, ETH_ALEN);
	crc = bitrev32(crc);
	/* Take 9 MSB bits */
	hash = (crc >> TGEC_HASH_MCAST_SHIFT) & TGEC_HASH_ADR_MSK;

	/* Create element to be added to the driver hash table */
	hash_entry = kmalloc(sizeof(*hash_entry), GFP_KERNEL);
	if (!hash_entry)
		return -ENOMEM;
	hash_entry->addr = addr;
	INIT_LIST_HEAD(&hash_entry->node);

	list_add_tail(&hash_entry->node,
		      &tgec->multicast_addr_hash->lsts[hash]);
	iowrite32be((hash | TGEC_HASH_MCAST_EN), &regs->hashtable_ctrl);

	return 0;
}

int tgec_del_hash_mac_address(struct fman_mac *tgec, enet_addr_t *eth_addr)
{
	struct tgec_regs __iomem *regs = tgec->regs;
	struct eth_hash_entry *hash_entry = NULL;
	struct list_head *pos;
	u32 crc = 0xFFFFFFFF, hash;
	u64 addr;

	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	addr = ((*(u64 *)eth_addr) >> 16);

	/* CRC calculation */
	crc = crc32_le(crc, (u8 *)eth_addr, ETH_ALEN);
	crc = bitrev32(crc);
	/* Take 9 MSB bits */
	hash = (crc >> TGEC_HASH_MCAST_SHIFT) & TGEC_HASH_ADR_MSK;

	list_for_each(pos, &tgec->multicast_addr_hash->lsts[hash]) {
		hash_entry = ETH_HASH_ENTRY_OBJ(pos);
		if (hash_entry->addr == addr) {
			list_del_init(&hash_entry->node);
			kfree(hash_entry);
			break;
		}
	}
	if (list_empty(&tgec->multicast_addr_hash->lsts[hash]))
		iowrite32be((hash & ~TGEC_HASH_MCAST_EN),
			    &regs->hashtable_ctrl);

	return 0;
}

int tgec_get_version(struct fman_mac *tgec, u32 *mac_version)
{
	struct tgec_regs __iomem *regs = tgec->regs;

	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	*mac_version = ioread32be(&regs->tgec_id);

	return 0;
}

int tgec_set_exception(struct fman_mac *tgec,
		       enum fman_mac_exceptions exception, bool enable)
{
	struct tgec_regs __iomem *regs = tgec->regs;
	u32 bit_mask = 0;

	if (!is_init_done(tgec->cfg))
		return -EINVAL;

	bit_mask = get_exception_flag(exception);
	if (bit_mask) {
		if (enable)
			tgec->exceptions |= bit_mask;
		else
			tgec->exceptions &= ~bit_mask;
	} else {
		pr_err("Undefined exception\n");
		return -EINVAL;
	}
	if (enable)
		iowrite32be(ioread32be(&regs->imask) | bit_mask, &regs->imask);
	else
		iowrite32be(ioread32be(&regs->imask) & ~bit_mask, &regs->imask);

	return 0;
}

int tgec_init(struct fman_mac *tgec)
{
	struct tgec_cfg *cfg;
	enet_addr_t eth_addr;
	int err;

	if (is_init_done(tgec->cfg))
		return -EINVAL;

	if (DEFAULT_RESET_ON_INIT &&
	    (fman_reset_mac(tgec->fm, tgec->mac_id) != 0)) {
		pr_err("Can't reset MAC!\n");
		return -EINVAL;
	}

	err = check_init_parameters(tgec);
	if (err)
		return err;

	cfg = tgec->cfg;

	MAKE_ENET_ADDR_FROM_UINT64(tgec->addr, eth_addr);
	set_mac_address(tgec->regs, (u8 *)eth_addr);

	/* interrupts */
	/* FM_10G_REM_N_LCL_FLT_EX_10GMAC_ERRATA_SW005 Errata workaround */
	if (tgec->fm_rev_info.major <= 2)
		tgec->exceptions &= ~(TGEC_IMASK_REM_FAULT |
				      TGEC_IMASK_LOC_FAULT);

	err = init(tgec->regs, cfg, tgec->exceptions);
	if (err) {
		free_init_resources(tgec);
		pr_err("TGEC version doesn't support this i/f mode\n");
		return err;
	}

	/* Max Frame Length */
	err = fman_set_mac_max_frame(tgec->fm, tgec->mac_id,
				     cfg->max_frame_length);
	if (err) {
		pr_err("Setting max frame length FAILED\n");
		free_init_resources(tgec);
		return -EINVAL;
	}

	/* FM_TX_FIFO_CORRUPTION_ERRATA_10GMAC_A007 Errata workaround */
	if (tgec->fm_rev_info.major == 2) {
		struct tgec_regs __iomem *regs = tgec->regs;
		u32 tmp;

		/* restore the default tx ipg Length */
		tmp = (ioread32be(&regs->tx_ipg_len) &
		       ~TGEC_TX_IPG_LENGTH_MASK) | 12;

		iowrite32be(tmp, &regs->tx_ipg_len);
	}

	tgec->multicast_addr_hash = alloc_hash_table(TGEC_HASH_TABLE_SIZE);
	if (!tgec->multicast_addr_hash) {
		free_init_resources(tgec);
		pr_err("allocation hash table is FAILED\n");
		return -ENOMEM;
	}

	tgec->unicast_addr_hash = alloc_hash_table(TGEC_HASH_TABLE_SIZE);
	if (!tgec->unicast_addr_hash) {
		free_init_resources(tgec);
		pr_err("allocation hash table is FAILED\n");
		return -ENOMEM;
	}

	fman_register_intr(tgec->fm, FMAN_MOD_MAC, tgec->mac_id,
			   FMAN_INTR_TYPE_ERR, tgec_err_exception, tgec);

	kfree(cfg);
	tgec->cfg = NULL;

	return 0;
}

int tgec_free(struct fman_mac *tgec)
{
	free_init_resources(tgec);

	kfree(tgec->cfg);
	kfree(tgec);

	return 0;
}

struct fman_mac *tgec_config(struct fman_mac_params *params)
{
	struct fman_mac *tgec;
	struct tgec_cfg *cfg;
	void __iomem *base_addr;

	base_addr = params->base_addr;
	/* allocate memory for the UCC GETH data structure. */
	tgec = kzalloc(sizeof(*tgec), GFP_KERNEL);
	if (!tgec)
		return NULL;

	/* allocate memory for the 10G MAC driver parameters data structure. */
	cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
	if (!cfg) {
		tgec_free(tgec);
		return NULL;
	}

	/* Plant parameter structure pointer */
	tgec->cfg = cfg;

	set_dflts(cfg);

	tgec->regs = base_addr;
	tgec->addr = ENET_ADDR_TO_UINT64(params->addr);
	tgec->max_speed = params->max_speed;
	tgec->mac_id = params->mac_id;
	tgec->exceptions = (TGEC_IMASK_MDIO_SCAN_EVENT	|
			    TGEC_IMASK_REM_FAULT	|
			    TGEC_IMASK_LOC_FAULT	|
			    TGEC_IMASK_TX_ECC_ER	|
			    TGEC_IMASK_TX_FIFO_UNFL	|
			    TGEC_IMASK_TX_FIFO_OVFL	|
			    TGEC_IMASK_TX_ER		|
			    TGEC_IMASK_RX_FIFO_OVFL	|
			    TGEC_IMASK_RX_ECC_ER	|
			    TGEC_IMASK_RX_JAB_FRM	|
			    TGEC_IMASK_RX_OVRSZ_FRM	|
			    TGEC_IMASK_RX_RUNT_FRM	|
			    TGEC_IMASK_RX_FRAG_FRM	|
			    TGEC_IMASK_RX_CRC_ER	|
			    TGEC_IMASK_RX_ALIGN_ER);
	tgec->exception_cb = params->exception_cb;
	tgec->event_cb = params->event_cb;
	tgec->dev_id = params->dev_id;
	tgec->fm = params->fm;

	/* Save FMan revision */
	fman_get_revision(tgec->fm, &tgec->fm_rev_info);

	return tgec;
}
OpenPOWER on IntegriCloud