aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/ixgbe/ixgbe_dcb_82598.c
blob: 62206273d88806921669f38f4ca3a911f4df5d31 (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
/*******************************************************************************

  Intel 10 Gigabit PCI Express Linux driver
  Copyright(c) 1999 - 2009 Intel Corporation.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  Linux NICS <linux.nics@intel.com>
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

#include "ixgbe.h"
#include "ixgbe_type.h"
#include "ixgbe_dcb.h"
#include "ixgbe_dcb_82598.h"

/**
 * ixgbe_dcb_get_tc_stats_82598 - Return status data for each traffic class
 * @hw: pointer to hardware structure
 * @stats: pointer to statistics structure
 * @tc_count:  Number of elements in bwg_array.
 *
 * This function returns the status data for each of the Traffic Classes in use.
 */
s32 ixgbe_dcb_get_tc_stats_82598(struct ixgbe_hw *hw,
                                 struct ixgbe_hw_stats *stats,
                                 u8 tc_count)
{
	int tc;

	if (tc_count > MAX_TRAFFIC_CLASS)
		return DCB_ERR_PARAM;

	/* Statistics pertaining to each traffic class */
	for (tc = 0; tc < tc_count; tc++) {
		/* Transmitted Packets */
		stats->qptc[tc] += IXGBE_READ_REG(hw, IXGBE_QPTC(tc));
		/* Transmitted Bytes */
		stats->qbtc[tc] += IXGBE_READ_REG(hw, IXGBE_QBTC(tc));
		/* Received Packets */
		stats->qprc[tc] += IXGBE_READ_REG(hw, IXGBE_QPRC(tc));
		/* Received Bytes */
		stats->qbrc[tc] += IXGBE_READ_REG(hw, IXGBE_QBRC(tc));
	}

	return 0;
}

/**
 * ixgbe_dcb_get_pfc_stats_82598 - Returns CBFC status data
 * @hw: pointer to hardware structure
 * @stats: pointer to statistics structure
 * @tc_count:  Number of elements in bwg_array.
 *
 * This function returns the CBFC status data for each of the Traffic Classes.
 */
s32 ixgbe_dcb_get_pfc_stats_82598(struct ixgbe_hw *hw,
                                  struct ixgbe_hw_stats *stats,
                                  u8 tc_count)
{
	int tc;

	if (tc_count > MAX_TRAFFIC_CLASS)
		return DCB_ERR_PARAM;

	for (tc = 0; tc < tc_count; tc++) {
		/* Priority XOFF Transmitted */
		stats->pxofftxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(tc));
		/* Priority XOFF Received */
		stats->pxoffrxc[tc] += IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(tc));
	}

	return 0;
}

/**
 * ixgbe_dcb_config_packet_buffers_82598 - Configure packet buffers
 * @hw: pointer to hardware structure
 * @dcb_config: pointer to ixgbe_dcb_config structure
 *
 * Configure packet buffers for DCB mode.
 */
static s32 ixgbe_dcb_config_packet_buffers_82598(struct ixgbe_hw *hw,
						 struct ixgbe_dcb_config *dcb_config)
{
	s32 ret_val = 0;
	u32 value = IXGBE_RXPBSIZE_64KB;
	u8  i = 0;

	/* Setup Rx packet buffer sizes */
	switch (dcb_config->rx_pba_cfg) {
	case pba_80_48:
		/* Setup the first four at 80KB */
		value = IXGBE_RXPBSIZE_80KB;
		for (; i < 4; i++)
			IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);
		/* Setup the last four at 48KB...don't re-init i */
		value = IXGBE_RXPBSIZE_48KB;
		/* Fall Through */
	case pba_equal:
	default:
		for (; i < IXGBE_MAX_PACKET_BUFFERS; i++)
			IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), value);

		/* Setup Tx packet buffer sizes */
		for (i = 0; i < IXGBE_MAX_PACKET_BUFFERS; i++) {
			IXGBE_WRITE_REG(hw, IXGBE_TXPBSIZE(i),
					IXGBE_TXPBSIZE_40KB);
		}
		break;
	}

	return ret_val;
}

/**
 * ixgbe_dcb_config_rx_arbiter_82598 - Config Rx data arbiter
 * @hw: pointer to hardware structure
 * @dcb_config: pointer to ixgbe_dcb_config structure
 *
 * Configure Rx Data Arbiter and credits for each traffic class.
 */
s32 ixgbe_dcb_config_rx_arbiter_82598(struct ixgbe_hw *hw,
                                      struct ixgbe_dcb_config *dcb_config)
{
	struct tc_bw_alloc    *p;
	u32    reg           = 0;
	u32    credit_refill = 0;
	u32    credit_max    = 0;
	u8     i             = 0;

	reg = IXGBE_READ_REG(hw, IXGBE_RUPPBMR) | IXGBE_RUPPBMR_MQA;
	IXGBE_WRITE_REG(hw, IXGBE_RUPPBMR, reg);

	reg = IXGBE_READ_REG(hw, IXGBE_RMCS);
	/* Enable Arbiter */
	reg &= ~IXGBE_RMCS_ARBDIS;
	/* Enable Receive Recycle within the BWG */
	reg |= IXGBE_RMCS_RRM;
	/* Enable Deficit Fixed Priority arbitration*/
	reg |= IXGBE_RMCS_DFP;

	IXGBE_WRITE_REG(hw, IXGBE_RMCS, reg);

	/* Configure traffic class credits and priority */
	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
		p = &dcb_config->tc_config[i].path[DCB_RX_CONFIG];
		credit_refill = p->data_credits_refill;
		credit_max    = p->data_credits_max;

		reg = credit_refill | (credit_max << IXGBE_RT2CR_MCL_SHIFT);

		if (p->prio_type == prio_link)
			reg |= IXGBE_RT2CR_LSP;

		IXGBE_WRITE_REG(hw, IXGBE_RT2CR(i), reg);
	}

	reg = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
	reg |= IXGBE_RDRXCTL_RDMTS_1_2;
	reg |= IXGBE_RDRXCTL_MPBEN;
	reg |= IXGBE_RDRXCTL_MCEN;
	IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, reg);

	reg = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
	/* Make sure there is enough descriptors before arbitration */
	reg &= ~IXGBE_RXCTRL_DMBYPS;
	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, reg);

	return 0;
}

/**
 * ixgbe_dcb_config_tx_desc_arbiter_82598 - Config Tx Desc. arbiter
 * @hw: pointer to hardware structure
 * @dcb_config: pointer to ixgbe_dcb_config structure
 *
 * Configure Tx Descriptor Arbiter and credits for each traffic class.
 */
s32 ixgbe_dcb_config_tx_desc_arbiter_82598(struct ixgbe_hw *hw,
                                           struct ixgbe_dcb_config *dcb_config)
{
	struct tc_bw_alloc *p;
	u32    reg, max_credits;
	u8     i;

	reg = IXGBE_READ_REG(hw, IXGBE_DPMCS);

	/* Enable arbiter */
	reg &= ~IXGBE_DPMCS_ARBDIS;
	if (!(dcb_config->round_robin_enable)) {
		/* Enable DFP and Recycle mode */
		reg |= (IXGBE_DPMCS_TDPAC | IXGBE_DPMCS_TRM);
	}
	reg |= IXGBE_DPMCS_TSOEF;
	/* Configure Max TSO packet size 34KB including payload and headers */
	reg |= (0x4 << IXGBE_DPMCS_MTSOS_SHIFT);

	IXGBE_WRITE_REG(hw, IXGBE_DPMCS, reg);

	/* Configure traffic class credits and priority */
	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
		p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG];
		max_credits = dcb_config->tc_config[i].desc_credits_max;
		reg = max_credits << IXGBE_TDTQ2TCCR_MCL_SHIFT;
		reg |= p->data_credits_refill;
		reg |= (u32)(p->bwg_id) << IXGBE_TDTQ2TCCR_BWG_SHIFT;

		if (p->prio_type == prio_group)
			reg |= IXGBE_TDTQ2TCCR_GSP;

		if (p->prio_type == prio_link)
			reg |= IXGBE_TDTQ2TCCR_LSP;

		IXGBE_WRITE_REG(hw, IXGBE_TDTQ2TCCR(i), reg);
	}

	return 0;
}

/**
 * ixgbe_dcb_config_tx_data_arbiter_82598 - Config Tx data arbiter
 * @hw: pointer to hardware structure
 * @dcb_config: pointer to ixgbe_dcb_config structure
 *
 * Configure Tx Data Arbiter and credits for each traffic class.
 */
s32 ixgbe_dcb_config_tx_data_arbiter_82598(struct ixgbe_hw *hw,
                                           struct ixgbe_dcb_config *dcb_config)
{
	struct tc_bw_alloc *p;
	u32 reg;
	u8 i;

	reg = IXGBE_READ_REG(hw, IXGBE_PDPMCS);
	/* Enable Data Plane Arbiter */
	reg &= ~IXGBE_PDPMCS_ARBDIS;
	/* Enable DFP and Transmit Recycle Mode */
	reg |= (IXGBE_PDPMCS_TPPAC | IXGBE_PDPMCS_TRM);

	IXGBE_WRITE_REG(hw, IXGBE_PDPMCS, reg);

	/* Configure traffic class credits and priority */
	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
		p = &dcb_config->tc_config[i].path[DCB_TX_CONFIG];
		reg = p->data_credits_refill;
		reg |= (u32)(p->data_credits_max) << IXGBE_TDPT2TCCR_MCL_SHIFT;
		reg |= (u32)(p->bwg_id) << IXGBE_TDPT2TCCR_BWG_SHIFT;

		if (p->prio_type == prio_group)
			reg |= IXGBE_TDPT2TCCR_GSP;

		if (p->prio_type == prio_link)
			reg |= IXGBE_TDPT2TCCR_LSP;

		IXGBE_WRITE_REG(hw, IXGBE_TDPT2TCCR(i), reg);
	}

	/* Enable Tx packet buffer division */
	reg = IXGBE_READ_REG(hw, IXGBE_DTXCTL);
	reg |= IXGBE_DTXCTL_ENDBUBD;
	IXGBE_WRITE_REG(hw, IXGBE_DTXCTL, reg);

	return 0;
}

/**
 * ixgbe_dcb_config_pfc_82598 - Config priority flow control
 * @hw: pointer to hardware structure
 * @dcb_config: pointer to ixgbe_dcb_config structure
 *
 * Configure Priority Flow Control for each traffic class.
 */
s32 ixgbe_dcb_config_pfc_82598(struct ixgbe_hw *hw,
                               struct ixgbe_dcb_config *dcb_config)
{
	u32 reg, rx_pba_size;
	u8  i;

	/* Enable Transmit Priority Flow Control */
	reg = IXGBE_READ_REG(hw, IXGBE_RMCS);
	reg &= ~IXGBE_RMCS_TFCE_802_3X;
	/* correct the reporting of our flow control status */
	reg |= IXGBE_RMCS_TFCE_PRIORITY;
	IXGBE_WRITE_REG(hw, IXGBE_RMCS, reg);

	/* Enable Receive Priority Flow Control */
	reg = IXGBE_READ_REG(hw, IXGBE_FCTRL);
	reg &= ~IXGBE_FCTRL_RFCE;
	reg |= IXGBE_FCTRL_RPFCE;
	IXGBE_WRITE_REG(hw, IXGBE_FCTRL, reg);

	/*
	 * Configure flow control thresholds and enable priority flow control
	 * for each traffic class.
	 */
	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
		if (dcb_config->rx_pba_cfg == pba_equal) {
			rx_pba_size = IXGBE_RXPBSIZE_64KB;
		} else {
			rx_pba_size = (i < 4) ? IXGBE_RXPBSIZE_80KB
					      : IXGBE_RXPBSIZE_48KB;
		}

		reg = ((rx_pba_size >> 5) &  0xFFF0);
		if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx ||
		    dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full)
			reg |= IXGBE_FCRTL_XONE;

		IXGBE_WRITE_REG(hw, IXGBE_FCRTL(i), reg);

		reg = ((rx_pba_size >> 2) & 0xFFF0);
		if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx ||
		    dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full)
			reg |= IXGBE_FCRTH_FCEN;

		IXGBE_WRITE_REG(hw, IXGBE_FCRTH(i), reg);
	}

	/* Configure pause time */
	for (i = 0; i < (MAX_TRAFFIC_CLASS >> 1); i++)
		IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), 0x68006800);

	/* Configure flow control refresh threshold value */
	IXGBE_WRITE_REG(hw, IXGBE_FCRTV, 0x3400);

	return 0;
}

/**
 * ixgbe_dcb_config_tc_stats_82598 - Configure traffic class statistics
 * @hw: pointer to hardware structure
 *
 * Configure queue statistics registers, all queues belonging to same traffic
 * class uses a single set of queue statistics counters.
 */
s32 ixgbe_dcb_config_tc_stats_82598(struct ixgbe_hw *hw)
{
	u32 reg = 0;
	u8  i   = 0;
	u8  j   = 0;

	/* Receive Queues stats setting -  8 queues per statistics reg */
	for (i = 0, j = 0; i < 15 && j < 8; i = i + 2, j++) {
		reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i));
		reg |= ((0x1010101) * j);
		IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
		reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i + 1));
		reg |= ((0x1010101) * j);
		IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i + 1), reg);
	}
	/* Transmit Queues stats setting -  4 queues per statistics reg */
	for (i = 0; i < 8; i++) {
		reg = IXGBE_READ_REG(hw, IXGBE_TQSMR(i));
		reg |= ((0x1010101) * i);
		IXGBE_WRITE_REG(hw, IXGBE_TQSMR(i), reg);
	}

	return 0;
}

/**
 * ixgbe_dcb_hw_config_82598 - Config and enable DCB
 * @hw: pointer to hardware structure
 * @dcb_config: pointer to ixgbe_dcb_config structure
 *
 * Configure dcb settings and enable dcb mode.
 */
s32 ixgbe_dcb_hw_config_82598(struct ixgbe_hw *hw,
                              struct ixgbe_dcb_config *dcb_config)
{
	ixgbe_dcb_config_packet_buffers_82598(hw, dcb_config);
	ixgbe_dcb_config_rx_arbiter_82598(hw, dcb_config);
	ixgbe_dcb_config_tx_desc_arbiter_82598(hw, dcb_config);
	ixgbe_dcb_config_tx_data_arbiter_82598(hw, dcb_config);
	ixgbe_dcb_config_pfc_82598(hw, dcb_config);
	ixgbe_dcb_config_tc_stats_82598(hw);

	return 0;
}