summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
blob: 531294f4978bc42bbb0e3cb0177b1312a33bef61 (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
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/*
 * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
 * stmmac TC Handling (HW only)
 */

#include <net/pkt_cls.h>
#include <net/tc_act/tc_gact.h>
#include "common.h"
#include "dwmac4.h"
#include "dwmac5.h"
#include "stmmac.h"

static void tc_fill_all_pass_entry(struct stmmac_tc_entry *entry)
{
	memset(entry, 0, sizeof(*entry));
	entry->in_use = true;
	entry->is_last = true;
	entry->is_frag = false;
	entry->prio = ~0x0;
	entry->handle = 0;
	entry->val.match_data = 0x0;
	entry->val.match_en = 0x0;
	entry->val.af = 1;
	entry->val.dma_ch_no = 0x0;
}

static struct stmmac_tc_entry *tc_find_entry(struct stmmac_priv *priv,
					     struct tc_cls_u32_offload *cls,
					     bool free)
{
	struct stmmac_tc_entry *entry, *first = NULL, *dup = NULL;
	u32 loc = cls->knode.handle;
	int i;

	for (i = 0; i < priv->tc_entries_max; i++) {
		entry = &priv->tc_entries[i];
		if (!entry->in_use && !first && free)
			first = entry;
		if (entry->handle == loc && !free)
			dup = entry;
	}

	if (dup)
		return dup;
	if (first) {
		first->handle = loc;
		first->in_use = true;

		/* Reset HW values */
		memset(&first->val, 0, sizeof(first->val));
	}

	return first;
}

static int tc_fill_actions(struct stmmac_tc_entry *entry,
			   struct stmmac_tc_entry *frag,
			   struct tc_cls_u32_offload *cls)
{
	struct stmmac_tc_entry *action_entry = entry;
	const struct tc_action *act;
	struct tcf_exts *exts;
	int i;

	exts = cls->knode.exts;
	if (!tcf_exts_has_actions(exts))
		return -EINVAL;
	if (frag)
		action_entry = frag;

	tcf_exts_for_each_action(i, act, exts) {
		/* Accept */
		if (is_tcf_gact_ok(act)) {
			action_entry->val.af = 1;
			break;
		}
		/* Drop */
		if (is_tcf_gact_shot(act)) {
			action_entry->val.rf = 1;
			break;
		}

		/* Unsupported */
		return -EINVAL;
	}

	return 0;
}

static int tc_fill_entry(struct stmmac_priv *priv,
			 struct tc_cls_u32_offload *cls)
{
	struct stmmac_tc_entry *entry, *frag = NULL;
	struct tc_u32_sel *sel = cls->knode.sel;
	u32 off, data, mask, real_off, rem;
	u32 prio = cls->common.prio;
	int ret;

	/* Only 1 match per entry */
	if (sel->nkeys <= 0 || sel->nkeys > 1)
		return -EINVAL;

	off = sel->keys[0].off << sel->offshift;
	data = sel->keys[0].val;
	mask = sel->keys[0].mask;

	switch (ntohs(cls->common.protocol)) {
	case ETH_P_ALL:
		break;
	case ETH_P_IP:
		off += ETH_HLEN;
		break;
	default:
		return -EINVAL;
	}

	if (off > priv->tc_off_max)
		return -EINVAL;

	real_off = off / 4;
	rem = off % 4;

	entry = tc_find_entry(priv, cls, true);
	if (!entry)
		return -EINVAL;

	if (rem) {
		frag = tc_find_entry(priv, cls, true);
		if (!frag) {
			ret = -EINVAL;
			goto err_unuse;
		}

		entry->frag_ptr = frag;
		entry->val.match_en = (mask << (rem * 8)) &
			GENMASK(31, rem * 8);
		entry->val.match_data = (data << (rem * 8)) &
			GENMASK(31, rem * 8);
		entry->val.frame_offset = real_off;
		entry->prio = prio;

		frag->val.match_en = (mask >> (rem * 8)) &
			GENMASK(rem * 8 - 1, 0);
		frag->val.match_data = (data >> (rem * 8)) &
			GENMASK(rem * 8 - 1, 0);
		frag->val.frame_offset = real_off + 1;
		frag->prio = prio;
		frag->is_frag = true;
	} else {
		entry->frag_ptr = NULL;
		entry->val.match_en = mask;
		entry->val.match_data = data;
		entry->val.frame_offset = real_off;
		entry->prio = prio;
	}

	ret = tc_fill_actions(entry, frag, cls);
	if (ret)
		goto err_unuse;

	return 0;

err_unuse:
	if (frag)
		frag->in_use = false;
	entry->in_use = false;
	return ret;
}

static void tc_unfill_entry(struct stmmac_priv *priv,
			    struct tc_cls_u32_offload *cls)
{
	struct stmmac_tc_entry *entry;

	entry = tc_find_entry(priv, cls, false);
	if (!entry)
		return;

	entry->in_use = false;
	if (entry->frag_ptr) {
		entry = entry->frag_ptr;
		entry->is_frag = false;
		entry->in_use = false;
	}
}

static int tc_config_knode(struct stmmac_priv *priv,
			   struct tc_cls_u32_offload *cls)
{
	int ret;

	ret = tc_fill_entry(priv, cls);
	if (ret)
		return ret;

	ret = stmmac_rxp_config(priv, priv->hw->pcsr, priv->tc_entries,
			priv->tc_entries_max);
	if (ret)
		goto err_unfill;

	return 0;

err_unfill:
	tc_unfill_entry(priv, cls);
	return ret;
}

static int tc_delete_knode(struct stmmac_priv *priv,
			   struct tc_cls_u32_offload *cls)
{
	int ret;

	/* Set entry and fragments as not used */
	tc_unfill_entry(priv, cls);

	ret = stmmac_rxp_config(priv, priv->hw->pcsr, priv->tc_entries,
			priv->tc_entries_max);
	if (ret)
		return ret;

	return 0;
}

static int tc_setup_cls_u32(struct stmmac_priv *priv,
			    struct tc_cls_u32_offload *cls)
{
	switch (cls->command) {
	case TC_CLSU32_REPLACE_KNODE:
		tc_unfill_entry(priv, cls);
		/* Fall through */
	case TC_CLSU32_NEW_KNODE:
		return tc_config_knode(priv, cls);
	case TC_CLSU32_DELETE_KNODE:
		return tc_delete_knode(priv, cls);
	default:
		return -EOPNOTSUPP;
	}
}

static int tc_init(struct stmmac_priv *priv)
{
	struct dma_features *dma_cap = &priv->dma_cap;
	unsigned int count;

	if (!dma_cap->frpsel)
		return -EINVAL;

	switch (dma_cap->frpbs) {
	case 0x0:
		priv->tc_off_max = 64;
		break;
	case 0x1:
		priv->tc_off_max = 128;
		break;
	case 0x2:
		priv->tc_off_max = 256;
		break;
	default:
		return -EINVAL;
	}

	switch (dma_cap->frpes) {
	case 0x0:
		count = 64;
		break;
	case 0x1:
		count = 128;
		break;
	case 0x2:
		count = 256;
		break;
	default:
		return -EINVAL;
	}

	/* Reserve one last filter which lets all pass */
	priv->tc_entries_max = count;
	priv->tc_entries = devm_kcalloc(priv->device,
			count, sizeof(*priv->tc_entries), GFP_KERNEL);
	if (!priv->tc_entries)
		return -ENOMEM;

	tc_fill_all_pass_entry(&priv->tc_entries[count - 1]);

	dev_info(priv->device, "Enabling HW TC (entries=%d, max_off=%d)\n",
			priv->tc_entries_max, priv->tc_off_max);
	return 0;
}

static int tc_setup_cbs(struct stmmac_priv *priv,
			struct tc_cbs_qopt_offload *qopt)
{
	u32 tx_queues_count = priv->plat->tx_queues_to_use;
	u32 queue = qopt->queue;
	u32 ptr, speed_div;
	u32 mode_to_use;
	u64 value;
	int ret;

	/* Queue 0 is not AVB capable */
	if (queue <= 0 || queue >= tx_queues_count)
		return -EINVAL;
	if (priv->speed != SPEED_100 && priv->speed != SPEED_1000)
		return -EOPNOTSUPP;

	mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use;
	if (mode_to_use == MTL_QUEUE_DCB && qopt->enable) {
		ret = stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_AVB);
		if (ret)
			return ret;

		priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
	} else if (!qopt->enable) {
		return stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_DCB);
	}

	/* Port Transmit Rate and Speed Divider */
	ptr = (priv->speed == SPEED_100) ? 4 : 8;
	speed_div = (priv->speed == SPEED_100) ? 100000 : 1000000;

	/* Final adjustments for HW */
	value = div_s64(qopt->idleslope * 1024ll * ptr, speed_div);
	priv->plat->tx_queues_cfg[queue].idle_slope = value & GENMASK(31, 0);

	value = div_s64(-qopt->sendslope * 1024ll * ptr, speed_div);
	priv->plat->tx_queues_cfg[queue].send_slope = value & GENMASK(31, 0);

	value = qopt->hicredit * 1024ll * 8;
	priv->plat->tx_queues_cfg[queue].high_credit = value & GENMASK(31, 0);

	value = qopt->locredit * 1024ll * 8;
	priv->plat->tx_queues_cfg[queue].low_credit = value & GENMASK(31, 0);

	ret = stmmac_config_cbs(priv, priv->hw,
				priv->plat->tx_queues_cfg[queue].send_slope,
				priv->plat->tx_queues_cfg[queue].idle_slope,
				priv->plat->tx_queues_cfg[queue].high_credit,
				priv->plat->tx_queues_cfg[queue].low_credit,
				queue);
	if (ret)
		return ret;

	dev_info(priv->device, "CBS queue %d: send %d, idle %d, hi %d, lo %d\n",
			queue, qopt->sendslope, qopt->idleslope,
			qopt->hicredit, qopt->locredit);
	return 0;
}

const struct stmmac_tc_ops dwmac510_tc_ops = {
	.init = tc_init,
	.setup_cls_u32 = tc_setup_cls_u32,
	.setup_cbs = tc_setup_cbs,
};