summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/intel/i40e/i40e_dcb_nl.c
blob: 871831a535d05a73fea023f341e6d41666364e61 (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
/*******************************************************************************
 *
 * Intel Ethernet Controller XL710 Family Linux Driver
 * Copyright(c) 2013 - 2014 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, see <http://www.gnu.org/licenses/>.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 ******************************************************************************/

#ifdef CONFIG_I40E_DCB
#include "i40e.h"
#include <net/dcbnl.h>

/**
 * i40e_get_pfc_delay - retrieve PFC Link Delay
 * @hw: pointer to hardware struct
 * @delay: holds the PFC Link delay value
 *
 * Returns PFC Link Delay from the PRTDCB_GENC.PFCLDA
 **/
static void i40e_get_pfc_delay(struct i40e_hw *hw, u16 *delay)
{
	u32 val;

	val = rd32(hw, I40E_PRTDCB_GENC);
	*delay = (u16)(val & I40E_PRTDCB_GENC_PFCLDA_MASK >>
		       I40E_PRTDCB_GENC_PFCLDA_SHIFT);
}

/**
 * i40e_dcbnl_ieee_getets - retrieve local IEEE ETS configuration
 * @netdev: the corresponding netdev
 * @ets: structure to hold the ETS information
 *
 * Returns local IEEE ETS configuration
 **/
static int i40e_dcbnl_ieee_getets(struct net_device *dev,
				  struct ieee_ets *ets)
{
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
	struct i40e_dcbx_config *dcbxcfg;
	struct i40e_hw *hw = &pf->hw;

	if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
		return -EINVAL;

	dcbxcfg = &hw->local_dcbx_config;
	ets->willing = dcbxcfg->etscfg.willing;
	ets->ets_cap = dcbxcfg->etscfg.maxtcs;
	ets->cbs = dcbxcfg->etscfg.cbs;
	memcpy(ets->tc_tx_bw, dcbxcfg->etscfg.tcbwtable,
		sizeof(ets->tc_tx_bw));
	memcpy(ets->tc_rx_bw, dcbxcfg->etscfg.tcbwtable,
		sizeof(ets->tc_rx_bw));
	memcpy(ets->tc_tsa, dcbxcfg->etscfg.tsatable,
		sizeof(ets->tc_tsa));
	memcpy(ets->prio_tc, dcbxcfg->etscfg.prioritytable,
		sizeof(ets->prio_tc));
	memcpy(ets->tc_reco_bw, dcbxcfg->etsrec.tcbwtable,
		sizeof(ets->tc_reco_bw));
	memcpy(ets->tc_reco_tsa, dcbxcfg->etsrec.tsatable,
		sizeof(ets->tc_reco_tsa));
	memcpy(ets->reco_prio_tc, dcbxcfg->etscfg.prioritytable,
		sizeof(ets->reco_prio_tc));

	return 0;
}

/**
 * i40e_dcbnl_ieee_getpfc - retrieve local IEEE PFC configuration
 * @netdev: the corresponding netdev
 * @ets: structure to hold the PFC information
 *
 * Returns local IEEE PFC configuration
 **/
static int i40e_dcbnl_ieee_getpfc(struct net_device *dev,
				  struct ieee_pfc *pfc)
{
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
	struct i40e_dcbx_config *dcbxcfg;
	struct i40e_hw *hw = &pf->hw;
	int i;

	if (!(pf->dcbx_cap & DCB_CAP_DCBX_VER_IEEE))
		return -EINVAL;

	dcbxcfg = &hw->local_dcbx_config;
	pfc->pfc_cap = dcbxcfg->pfc.pfccap;
	pfc->pfc_en = dcbxcfg->pfc.pfcenable;
	pfc->mbc = dcbxcfg->pfc.mbc;
	i40e_get_pfc_delay(hw, &pfc->delay);

	/* Get Requests/Indicatiosn */
	for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
		pfc->requests[i] = pf->stats.priority_xoff_tx[i];
		pfc->indications[i] = pf->stats.priority_xoff_rx[i];
	}

	return 0;
}

/**
 * i40e_dcbnl_getdcbx - retrieve current DCBx capability
 * @netdev: the corresponding netdev
 *
 * Returns DCBx capability features
 **/
static u8 i40e_dcbnl_getdcbx(struct net_device *dev)
{
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);

	return pf->dcbx_cap;
}

/**
 * i40e_dcbnl_get_perm_hw_addr - MAC address used by DCBx
 * @netdev: the corresponding netdev
 *
 * Returns the SAN MAC address used for LLDP exchange
 **/
static void i40e_dcbnl_get_perm_hw_addr(struct net_device *dev,
					u8 *perm_addr)
{
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
	int i, j;

	memset(perm_addr, 0xff, MAX_ADDR_LEN);

	for (i = 0; i < dev->addr_len; i++)
		perm_addr[i] = pf->hw.mac.perm_addr[i];

	for (j = 0; j < dev->addr_len; j++, i++)
		perm_addr[i] = pf->hw.mac.san_addr[j];
}

static const struct dcbnl_rtnl_ops dcbnl_ops = {
	.ieee_getets	= i40e_dcbnl_ieee_getets,
	.ieee_getpfc	= i40e_dcbnl_ieee_getpfc,
	.getdcbx	= i40e_dcbnl_getdcbx,
	.getpermhwaddr  = i40e_dcbnl_get_perm_hw_addr,
};

/**
 * i40e_dcbnl_set_all - set all the apps and ieee data from DCBx config
 * @vsi: the corresponding vsi
 *
 * Set up all the IEEE APPs in the DCBNL App Table and generate event for
 * other settings
 **/
void i40e_dcbnl_set_all(struct i40e_vsi *vsi)
{
	struct net_device *dev = vsi->netdev;
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);
	struct i40e_dcbx_config *dcbxcfg;
	struct i40e_hw *hw = &pf->hw;
	struct dcb_app sapp;
	u8 prio, tc_map;
	int i;

	/* DCB not enabled */
	if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
		return;

	dcbxcfg = &hw->local_dcbx_config;

	/* Set up all the App TLVs if DCBx is negotiated */
	for (i = 0; i < dcbxcfg->numapps; i++) {
		prio = dcbxcfg->app[i].priority;
		tc_map = (1 << dcbxcfg->etscfg.prioritytable[prio]);

		/* Add APP only if the TC is enabled for this VSI */
		if (tc_map & vsi->tc_config.enabled_tc) {
			sapp.selector = dcbxcfg->app[i].selector;
			sapp.protocol = dcbxcfg->app[i].protocolid;
			sapp.priority = prio;
			dcb_ieee_setapp(dev, &sapp);
		}
	}

	/* Notify user-space of the changes */
	dcbnl_ieee_notify(dev, RTM_SETDCB, DCB_CMD_IEEE_SET, 0, 0);
}

/**
 * i40e_dcbnl_vsi_del_app - Delete APP for given VSI
 * @vsi: the corresponding vsi
 * @app: APP to delete
 *
 * Delete given APP from the DCBNL APP table for given
 * VSI
 **/
static int i40e_dcbnl_vsi_del_app(struct i40e_vsi *vsi,
				  struct i40e_ieee_app_priority_table *app)
{
	struct net_device *dev = vsi->netdev;
	struct dcb_app sapp;

	if (!dev)
		return -EINVAL;

	sapp.selector = app->selector;
	sapp.protocol = app->protocolid;
	sapp.priority = app->priority;
	return dcb_ieee_delapp(dev, &sapp);
}

/**
 * i40e_dcbnl_del_app - Delete APP on all VSIs
 * @pf: the corresponding pf
 * @app: APP to delete
 *
 * Delete given APP from all the VSIs for given PF
 **/
static void i40e_dcbnl_del_app(struct i40e_pf *pf,
			      struct i40e_ieee_app_priority_table *app)
{
	int v, err;
	for (v = 0; v < pf->num_alloc_vsi; v++) {
		if (pf->vsi[v] && pf->vsi[v]->netdev) {
			err = i40e_dcbnl_vsi_del_app(pf->vsi[v], app);
			if (err)
				dev_info(&pf->pdev->dev, "%s: Failed deleting app for VSI seid=%d err=%d sel=%d proto=0x%x prio=%d\n",
					 __func__, pf->vsi[v]->seid,
					 err, app->selector,
					 app->protocolid, app->priority);
		}
	}
}

/**
 * i40e_dcbnl_find_app - Search APP in given DCB config
 * @cfg: DCBX configuration data
 * @app: APP to search for
 *
 * Find given APP in the DCB configuration
 **/
static bool i40e_dcbnl_find_app(struct i40e_dcbx_config *cfg,
				struct i40e_ieee_app_priority_table *app)
{
	int i;

	for (i = 0; i < cfg->numapps; i++) {
		if (app->selector == cfg->app[i].selector &&
		    app->protocolid == cfg->app[i].protocolid &&
		    app->priority == cfg->app[i].priority)
			return true;
	}

	return false;
}

/**
 * i40e_dcbnl_flush_apps - Delete all removed APPs
 * @pf: the corresponding pf
 * @new_cfg: new DCBX configuration data
 *
 * Find and delete all APPs that are not present in the passed
 * DCB configuration
 **/
void i40e_dcbnl_flush_apps(struct i40e_pf *pf,
			   struct i40e_dcbx_config *new_cfg)
{
	struct i40e_ieee_app_priority_table app;
	struct i40e_dcbx_config *dcbxcfg;
	struct i40e_hw *hw = &pf->hw;
	int i;

	dcbxcfg = &hw->local_dcbx_config;
	for (i = 0; i < dcbxcfg->numapps; i++) {
		app = dcbxcfg->app[i];
		/* The APP is not available anymore delete it */
		if (!i40e_dcbnl_find_app(new_cfg, &app))
			i40e_dcbnl_del_app(pf, &app);
	}
}

/**
 * i40e_dcbnl_setup - DCBNL setup
 * @vsi: the corresponding vsi
 *
 * Set up DCBNL ops and initial APP TLVs
 **/
void i40e_dcbnl_setup(struct i40e_vsi *vsi)
{
	struct net_device *dev = vsi->netdev;
	struct i40e_pf *pf = i40e_netdev_to_pf(dev);

	/* DCB not enabled */
	if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
		return;

	/* Do not setup DCB NL ops for MFP mode */
	if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
		dev->dcbnl_ops = &dcbnl_ops;

	/* Set initial IEEE DCB settings */
	i40e_dcbnl_set_all(vsi);
}
#endif /* CONFIG_I40E_DCB */