aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/samsung/sxgbe/sxgbe_desc.c
blob: e896dbbd2e156514eaf1d83ed8e132fbc3d88e37 (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
/* 10G controller driver for Samsung SoCs
 *
 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com
 *
 * Author: Siva Reddy Kallam <siva.kallam@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/bitops.h>
#include <linux/export.h>
#include <linux/io.h>
#include <linux/netdevice.h>
#include <linux/phy.h>

#include "sxgbe_common.h"
#include "sxgbe_dma.h"
#include "sxgbe_desc.h"

/* DMA TX descriptor ring initialization */
static void sxgbe_init_tx_desc(struct sxgbe_tx_norm_desc *p)
{
	p->tdes23.tx_rd_des23.own_bit = 0;
}

static void sxgbe_tx_desc_enable_tse(struct sxgbe_tx_norm_desc *p, u8 is_tse,
				     u32 total_hdr_len, u32 tcp_hdr_len,
				     u32 tcp_payload_len)
{
	p->tdes23.tx_rd_des23.tse_bit = is_tse;
	p->tdes23.tx_rd_des23.buf1_size = total_hdr_len;
	p->tdes23.tx_rd_des23.tcp_hdr_len = tcp_hdr_len / 4;
	p->tdes23.tx_rd_des23.tx_pkt_len.tcp_payload_len  = tcp_payload_len;
}

/* Assign buffer lengths for descriptor */
static void sxgbe_prepare_tx_desc(struct sxgbe_tx_norm_desc *p, u8 is_fd,
				  int buf1_len, int pkt_len, int cksum)
{
	p->tdes23.tx_rd_des23.first_desc = is_fd;
	p->tdes23.tx_rd_des23.buf1_size = buf1_len;

	p->tdes23.tx_rd_des23.tx_pkt_len.cksum_pktlen.total_pkt_len = pkt_len;

	if (cksum)
		p->tdes23.tx_rd_des23.tx_pkt_len.cksum_pktlen.cksum_ctl = cic_full;
}

/* Set VLAN control information */
static void sxgbe_tx_vlanctl_desc(struct sxgbe_tx_norm_desc *p, int vlan_ctl)
{
	p->tdes23.tx_rd_des23.vlan_tag_ctl = vlan_ctl;
}

/* Set the owner of Normal descriptor */
static void sxgbe_set_tx_owner(struct sxgbe_tx_norm_desc *p)
{
	p->tdes23.tx_rd_des23.own_bit = 1;
}

/* Get the owner of Normal descriptor */
static int sxgbe_get_tx_owner(struct sxgbe_tx_norm_desc *p)
{
	return p->tdes23.tx_rd_des23.own_bit;
}

/* Invoked by the xmit function to close the tx descriptor */
static void sxgbe_close_tx_desc(struct sxgbe_tx_norm_desc *p)
{
	p->tdes23.tx_rd_des23.last_desc = 1;
	p->tdes23.tx_rd_des23.int_on_com = 1;
}

/* Clean the tx descriptor as soon as the tx irq is received */
static void sxgbe_release_tx_desc(struct sxgbe_tx_norm_desc *p)
{
	memset(p, 0, sizeof(*p));
}

/* Clear interrupt on tx frame completion. When this bit is
 * set an interrupt happens as soon as the frame is transmitted
 */
static void sxgbe_clear_tx_ic(struct sxgbe_tx_norm_desc *p)
{
	p->tdes23.tx_rd_des23.int_on_com = 0;
}

/* Last tx segment reports the transmit status */
static int sxgbe_get_tx_ls(struct sxgbe_tx_norm_desc *p)
{
	return p->tdes23.tx_rd_des23.last_desc;
}

/* Get the buffer size from the descriptor */
static int sxgbe_get_tx_len(struct sxgbe_tx_norm_desc *p)
{
	return p->tdes23.tx_rd_des23.buf1_size;
}

/* Set tx timestamp enable bit */
static void sxgbe_tx_enable_tstamp(struct sxgbe_tx_norm_desc *p)
{
	p->tdes23.tx_rd_des23.timestmp_enable = 1;
}

/* get tx timestamp status */
static int sxgbe_get_tx_timestamp_status(struct sxgbe_tx_norm_desc *p)
{
	return p->tdes23.tx_rd_des23.timestmp_enable;
}

/* TX Context Descripto Specific */
static void sxgbe_tx_ctxt_desc_set_ctxt(struct sxgbe_tx_ctxt_desc *p)
{
	p->ctxt_bit = 1;
}

/* Set the owner of TX context descriptor */
static void sxgbe_tx_ctxt_desc_set_owner(struct sxgbe_tx_ctxt_desc *p)
{
	p->own_bit = 1;
}

/* Get the owner of TX context descriptor */
static int sxgbe_tx_ctxt_desc_get_owner(struct sxgbe_tx_ctxt_desc *p)
{
	return p->own_bit;
}

/* Set TX mss in TX context Descriptor */
static void sxgbe_tx_ctxt_desc_set_mss(struct sxgbe_tx_ctxt_desc *p, u16 mss)
{
	p->maxseg_size = mss;
}

/* Get TX mss from TX context Descriptor */
static int sxgbe_tx_ctxt_desc_get_mss(struct sxgbe_tx_ctxt_desc *p)
{
	return p->maxseg_size;
}

/* Set TX tcmssv in TX context Descriptor */
static void sxgbe_tx_ctxt_desc_set_tcmssv(struct sxgbe_tx_ctxt_desc *p)
{
	p->tcmssv = 1;
}

/* Reset TX ostc in TX context Descriptor */
static void sxgbe_tx_ctxt_desc_reset_ostc(struct sxgbe_tx_ctxt_desc *p)
{
	p->ostc = 0;
}

/* Set IVLAN information */
static void sxgbe_tx_ctxt_desc_set_ivlantag(struct sxgbe_tx_ctxt_desc *p,
					    int is_ivlanvalid, int ivlan_tag,
					    int ivlan_ctl)
{
	if (is_ivlanvalid) {
		p->ivlan_tag_valid = is_ivlanvalid;
		p->ivlan_tag = ivlan_tag;
		p->ivlan_tag_ctl = ivlan_ctl;
	}
}

/* Return IVLAN Tag */
static int sxgbe_tx_ctxt_desc_get_ivlantag(struct sxgbe_tx_ctxt_desc *p)
{
	return p->ivlan_tag;
}

/* Set VLAN Tag */
static void sxgbe_tx_ctxt_desc_set_vlantag(struct sxgbe_tx_ctxt_desc *p,
					   int is_vlanvalid, int vlan_tag)
{
	if (is_vlanvalid) {
		p->vltag_valid = is_vlanvalid;
		p->vlan_tag = vlan_tag;
	}
}

/* Return VLAN Tag */
static int sxgbe_tx_ctxt_desc_get_vlantag(struct sxgbe_tx_ctxt_desc *p)
{
	return p->vlan_tag;
}

/* Set Time stamp */
static void sxgbe_tx_ctxt_desc_set_tstamp(struct sxgbe_tx_ctxt_desc *p,
					  u8 ostc_enable, u64 tstamp)
{
	if (ostc_enable) {
		p->ostc = ostc_enable;
		p->tstamp_lo = (u32) tstamp;
		p->tstamp_hi = (u32) (tstamp>>32);
	}
}
/* Close TX context descriptor */
static void sxgbe_tx_ctxt_desc_close(struct sxgbe_tx_ctxt_desc *p)
{
	p->own_bit = 1;
}

/* WB status of context descriptor */
static int sxgbe_tx_ctxt_desc_get_cde(struct sxgbe_tx_ctxt_desc *p)
{
	return p->ctxt_desc_err;
}

/* DMA RX descriptor ring initialization */
static void sxgbe_init_rx_desc(struct sxgbe_rx_norm_desc *p, int disable_rx_ic,
			       int mode, int end)
{
	p->rdes23.rx_rd_des23.own_bit = 1;
	if (disable_rx_ic)
		p->rdes23.rx_rd_des23.int_on_com = disable_rx_ic;
}

/* Get RX own bit */
static int sxgbe_get_rx_owner(struct sxgbe_rx_norm_desc *p)
{
	return p->rdes23.rx_rd_des23.own_bit;
}

/* Set RX own bit */
static void sxgbe_set_rx_owner(struct sxgbe_rx_norm_desc *p)
{
	p->rdes23.rx_rd_des23.own_bit = 1;
}

/* Get the receive frame size */
static int sxgbe_get_rx_frame_len(struct sxgbe_rx_norm_desc *p)
{
	return p->rdes23.rx_wb_des23.pkt_len;
}

/* Return first Descriptor status */
static int sxgbe_get_rx_fd_status(struct sxgbe_rx_norm_desc *p)
{
	return p->rdes23.rx_wb_des23.first_desc;
}

/* Return Last Descriptor status */
static int sxgbe_get_rx_ld_status(struct sxgbe_rx_norm_desc *p)
{
	return p->rdes23.rx_wb_des23.last_desc;
}


/* Return the RX status looking at the WB fields */
static int sxgbe_rx_wbstatus(struct sxgbe_rx_norm_desc *p,
			     struct sxgbe_extra_stats *x, int *checksum)
{
	int status = 0;

	*checksum = CHECKSUM_UNNECESSARY;
	if (p->rdes23.rx_wb_des23.err_summary) {
		switch (p->rdes23.rx_wb_des23.err_l2_type) {
		case RX_GMII_ERR:
			status = -EINVAL;
			x->rx_code_gmii_err++;
			break;
		case RX_WATCHDOG_ERR:
			status = -EINVAL;
			x->rx_watchdog_err++;
			break;
		case RX_CRC_ERR:
			status = -EINVAL;
			x->rx_crc_err++;
			break;
		case RX_GAINT_ERR:
			status = -EINVAL;
			x->rx_gaint_pkt_err++;
			break;
		case RX_IP_HDR_ERR:
			*checksum = CHECKSUM_NONE;
			x->ip_hdr_err++;
			break;
		case RX_PAYLOAD_ERR:
			*checksum = CHECKSUM_NONE;
			x->ip_payload_err++;
			break;
		case RX_OVERFLOW_ERR:
			status = -EINVAL;
			x->overflow_error++;
			break;
		default:
			pr_err("Invalid Error type\n");
			break;
		}
	} else {
		switch (p->rdes23.rx_wb_des23.err_l2_type) {
		case RX_LEN_PKT:
			x->len_pkt++;
			break;
		case RX_MACCTL_PKT:
			x->mac_ctl_pkt++;
			break;
		case RX_DCBCTL_PKT:
			x->dcb_ctl_pkt++;
			break;
		case RX_ARP_PKT:
			x->arp_pkt++;
			break;
		case RX_OAM_PKT:
			x->oam_pkt++;
			break;
		case RX_UNTAG_PKT:
			x->untag_okt++;
			break;
		case RX_OTHER_PKT:
			x->other_pkt++;
			break;
		case RX_SVLAN_PKT:
			x->svlan_tag_pkt++;
			break;
		case RX_CVLAN_PKT:
			x->cvlan_tag_pkt++;
			break;
		case RX_DVLAN_OCVLAN_ICVLAN_PKT:
			x->dvlan_ocvlan_icvlan_pkt++;
			break;
		case RX_DVLAN_OSVLAN_ISVLAN_PKT:
			x->dvlan_osvlan_isvlan_pkt++;
			break;
		case RX_DVLAN_OSVLAN_ICVLAN_PKT:
			x->dvlan_osvlan_icvlan_pkt++;
			break;
		case RX_DVLAN_OCVLAN_ISVLAN_PKT:
			x->dvlan_ocvlan_icvlan_pkt++;
			break;
		default:
			pr_err("Invalid L2 Packet type\n");
			break;
		}
	}

	/* L3/L4 Pkt type */
	switch (p->rdes23.rx_wb_des23.layer34_pkt_type) {
	case RX_NOT_IP_PKT:
		x->not_ip_pkt++;
		break;
	case RX_IPV4_TCP_PKT:
		x->ip4_tcp_pkt++;
		break;
	case RX_IPV4_UDP_PKT:
		x->ip4_udp_pkt++;
		break;
	case RX_IPV4_ICMP_PKT:
		x->ip4_icmp_pkt++;
		break;
	case RX_IPV4_UNKNOWN_PKT:
		x->ip4_unknown_pkt++;
		break;
	case RX_IPV6_TCP_PKT:
		x->ip6_tcp_pkt++;
		break;
	case RX_IPV6_UDP_PKT:
		x->ip6_udp_pkt++;
		break;
	case RX_IPV6_ICMP_PKT:
		x->ip6_icmp_pkt++;
		break;
	case RX_IPV6_UNKNOWN_PKT:
		x->ip6_unknown_pkt++;
		break;
	default:
		pr_err("Invalid L3/L4 Packet type\n");
		break;
	}

	/* Filter */
	if (p->rdes23.rx_wb_des23.vlan_filter_match)
		x->vlan_filter_match++;

	if (p->rdes23.rx_wb_des23.sa_filter_fail) {
		status = -EINVAL;
		x->sa_filter_fail++;
	}
	if (p->rdes23.rx_wb_des23.da_filter_fail) {
		status = -EINVAL;
		x->da_filter_fail++;
	}
	if (p->rdes23.rx_wb_des23.hash_filter_pass)
		x->hash_filter_pass++;

	if (p->rdes23.rx_wb_des23.l3_filter_match)
		x->l3_filter_match++;

	if (p->rdes23.rx_wb_des23.l4_filter_match)
		x->l4_filter_match++;

	return status;
}

/* Get own bit of context descriptor */
static int sxgbe_get_rx_ctxt_owner(struct sxgbe_rx_ctxt_desc *p)
{
	return p->own_bit;
}

/* Set own bit for context descriptor */
static void sxgbe_set_ctxt_rx_owner(struct sxgbe_rx_ctxt_desc *p)
{
	p->own_bit = 1;
}


/* Return the reception status looking at Context control information */
static void sxgbe_rx_ctxt_wbstatus(struct sxgbe_rx_ctxt_desc *p,
				   struct sxgbe_extra_stats *x)
{
	if (p->tstamp_dropped)
		x->timestamp_dropped++;

	/* ptp */
	if (p->ptp_msgtype == RX_NO_PTP)
		x->rx_msg_type_no_ptp++;
	else if (p->ptp_msgtype == RX_PTP_SYNC)
		x->rx_ptp_type_sync++;
	else if (p->ptp_msgtype == RX_PTP_FOLLOW_UP)
		x->rx_ptp_type_follow_up++;
	else if (p->ptp_msgtype == RX_PTP_DELAY_REQ)
		x->rx_ptp_type_delay_req++;
	else if (p->ptp_msgtype == RX_PTP_DELAY_RESP)
		x->rx_ptp_type_delay_resp++;
	else if (p->ptp_msgtype == RX_PTP_PDELAY_REQ)
		x->rx_ptp_type_pdelay_req++;
	else if (p->ptp_msgtype == RX_PTP_PDELAY_RESP)
		x->rx_ptp_type_pdelay_resp++;
	else if (p->ptp_msgtype == RX_PTP_PDELAY_FOLLOW_UP)
		x->rx_ptp_type_pdelay_follow_up++;
	else if (p->ptp_msgtype == RX_PTP_ANNOUNCE)
		x->rx_ptp_announce++;
	else if (p->ptp_msgtype == RX_PTP_MGMT)
		x->rx_ptp_mgmt++;
	else if (p->ptp_msgtype == RX_PTP_SIGNAL)
		x->rx_ptp_signal++;
	else if (p->ptp_msgtype == RX_PTP_RESV_MSG)
		x->rx_ptp_resv_msg_type++;
}

/* Get rx timestamp status */
static int sxgbe_get_rx_ctxt_tstamp_status(struct sxgbe_rx_ctxt_desc *p)
{
	if ((p->tstamp_hi == 0xffffffff) && (p->tstamp_lo == 0xffffffff)) {
		pr_err("Time stamp corrupted\n");
		return 0;
	}

	return p->tstamp_available;
}


static u64 sxgbe_get_rx_timestamp(struct sxgbe_rx_ctxt_desc *p)
{
	u64 ns;

	ns = p->tstamp_lo;
	ns |= ((u64)p->tstamp_hi) << 32;

	return ns;
}

static const struct sxgbe_desc_ops desc_ops = {
	.init_tx_desc			= sxgbe_init_tx_desc,
	.tx_desc_enable_tse		= sxgbe_tx_desc_enable_tse,
	.prepare_tx_desc		= sxgbe_prepare_tx_desc,
	.tx_vlanctl_desc		= sxgbe_tx_vlanctl_desc,
	.set_tx_owner			= sxgbe_set_tx_owner,
	.get_tx_owner			= sxgbe_get_tx_owner,
	.close_tx_desc			= sxgbe_close_tx_desc,
	.release_tx_desc		= sxgbe_release_tx_desc,
	.clear_tx_ic			= sxgbe_clear_tx_ic,
	.get_tx_ls			= sxgbe_get_tx_ls,
	.get_tx_len			= sxgbe_get_tx_len,
	.tx_enable_tstamp		= sxgbe_tx_enable_tstamp,
	.get_tx_timestamp_status	= sxgbe_get_tx_timestamp_status,
	.tx_ctxt_desc_set_ctxt		= sxgbe_tx_ctxt_desc_set_ctxt,
	.tx_ctxt_desc_set_owner		= sxgbe_tx_ctxt_desc_set_owner,
	.get_tx_ctxt_owner		= sxgbe_tx_ctxt_desc_get_owner,
	.tx_ctxt_desc_set_mss		= sxgbe_tx_ctxt_desc_set_mss,
	.tx_ctxt_desc_get_mss		= sxgbe_tx_ctxt_desc_get_mss,
	.tx_ctxt_desc_set_tcmssv	= sxgbe_tx_ctxt_desc_set_tcmssv,
	.tx_ctxt_desc_reset_ostc	= sxgbe_tx_ctxt_desc_reset_ostc,
	.tx_ctxt_desc_set_ivlantag	= sxgbe_tx_ctxt_desc_set_ivlantag,
	.tx_ctxt_desc_get_ivlantag	= sxgbe_tx_ctxt_desc_get_ivlantag,
	.tx_ctxt_desc_set_vlantag	= sxgbe_tx_ctxt_desc_set_vlantag,
	.tx_ctxt_desc_get_vlantag	= sxgbe_tx_ctxt_desc_get_vlantag,
	.tx_ctxt_set_tstamp		= sxgbe_tx_ctxt_desc_set_tstamp,
	.close_tx_ctxt_desc		= sxgbe_tx_ctxt_desc_close,
	.get_tx_ctxt_cde		= sxgbe_tx_ctxt_desc_get_cde,
	.init_rx_desc			= sxgbe_init_rx_desc,
	.get_rx_owner			= sxgbe_get_rx_owner,
	.set_rx_owner			= sxgbe_set_rx_owner,
	.get_rx_frame_len		= sxgbe_get_rx_frame_len,
	.get_rx_fd_status		= sxgbe_get_rx_fd_status,
	.get_rx_ld_status		= sxgbe_get_rx_ld_status,
	.rx_wbstatus			= sxgbe_rx_wbstatus,
	.get_rx_ctxt_owner		= sxgbe_get_rx_ctxt_owner,
	.set_rx_ctxt_owner		= sxgbe_set_ctxt_rx_owner,
	.rx_ctxt_wbstatus		= sxgbe_rx_ctxt_wbstatus,
	.get_rx_ctxt_tstamp_status	= sxgbe_get_rx_ctxt_tstamp_status,
	.get_timestamp			= sxgbe_get_rx_timestamp,
};

const struct sxgbe_desc_ops *sxgbe_get_desc_ops(void)
{
	return &desc_ops;
}