1/* Intel Ethernet Switch Host Interface Driver
2 * Copyright(c) 2013 - 2015 Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
11 * more details.
12 *
13 * The full GNU General Public License is included in this distribution in
14 * the file called "COPYING".
15 *
16 * Contact Information:
17 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
18 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
19 */
20
21#include "fm10k.h"
22
23#ifdef CONFIG_DCB
24/**
25 * fm10k_dcbnl_ieee_getets - get the ETS configuration for the device
26 * @dev: netdev interface for the device
27 * @ets: ETS structure to push configuration to
28 **/
29static int fm10k_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
30{
31	int i;
32
33	/* we support 8 TCs in all modes */
34	ets->ets_cap = IEEE_8021QAZ_MAX_TCS;
35	ets->cbs = 0;
36
37	/* we only support strict priority and cannot do traffic shaping */
38	memset(ets->tc_tx_bw, 0, sizeof(ets->tc_tx_bw));
39	memset(ets->tc_rx_bw, 0, sizeof(ets->tc_rx_bw));
40	memset(ets->tc_tsa, IEEE_8021QAZ_TSA_STRICT, sizeof(ets->tc_tsa));
41
42	/* populate the prio map based on the netdev */
43	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
44		ets->prio_tc[i] = netdev_get_prio_tc_map(dev, i);
45
46	return 0;
47}
48
49/**
50 * fm10k_dcbnl_ieee_setets - set the ETS configuration for the device
51 * @dev: netdev interface for the device
52 * @ets: ETS structure to pull configuration from
53 **/
54static int fm10k_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
55{
56	u8 num_tc = 0;
57	int i, err;
58
59	/* verify type and determine num_tcs needed */
60	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
61		if (ets->tc_tx_bw[i] || ets->tc_rx_bw[i])
62			return -EINVAL;
63		if (ets->tc_tsa[i] != IEEE_8021QAZ_TSA_STRICT)
64			return -EINVAL;
65		if (ets->prio_tc[i] > num_tc)
66			num_tc = ets->prio_tc[i];
67	}
68
69	/* if requested TC is greater than 0 then num_tcs is max + 1 */
70	if (num_tc)
71		num_tc++;
72
73	if (num_tc > IEEE_8021QAZ_MAX_TCS)
74		return -EINVAL;
75
76	/* update TC hardware mapping if necessary */
77	if (num_tc != netdev_get_num_tc(dev)) {
78		err = fm10k_setup_tc(dev, num_tc);
79		if (err)
80			return err;
81	}
82
83	/* update priority mapping */
84	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
85		netdev_set_prio_tc_map(dev, i, ets->prio_tc[i]);
86
87	return 0;
88}
89
90/**
91 * fm10k_dcbnl_ieee_getpfc - get the PFC configuration for the device
92 * @dev: netdev interface for the device
93 * @pfc: PFC structure to push configuration to
94 **/
95static int fm10k_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
96{
97	struct fm10k_intfc *interface = netdev_priv(dev);
98
99	/* record flow control max count and state of TCs */
100	pfc->pfc_cap = IEEE_8021QAZ_MAX_TCS;
101	pfc->pfc_en = interface->pfc_en;
102
103	return 0;
104}
105
106/**
107 * fm10k_dcbnl_ieee_setpfc - set the PFC configuration for the device
108 * @dev: netdev interface for the device
109 * @pfc: PFC structure to pull configuration from
110 **/
111static int fm10k_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
112{
113	struct fm10k_intfc *interface = netdev_priv(dev);
114
115	/* record PFC configuration to interface */
116	interface->pfc_en = pfc->pfc_en;
117
118	/* if we are running update the drop_en state for all queues */
119	if (netif_running(dev))
120		fm10k_update_rx_drop_en(interface);
121
122	return 0;
123}
124
125/**
126 * fm10k_dcbnl_ieee_getdcbx - get the DCBX configuration for the device
127 * @dev: netdev interface for the device
128 *
129 * Returns that we support only IEEE DCB for this interface
130 **/
131static u8 fm10k_dcbnl_getdcbx(struct net_device __always_unused *dev)
132{
133	return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
134}
135
136/**
137 * fm10k_dcbnl_ieee_setdcbx - get the DCBX configuration for the device
138 * @dev: netdev interface for the device
139 * @mode: new mode for this device
140 *
141 * Returns error on attempt to enable anything but IEEE DCB for this interface
142 **/
143static u8 fm10k_dcbnl_setdcbx(struct net_device __always_unused *dev, u8 mode)
144{
145	return (mode != (DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE)) ? 1 : 0;
146}
147
148static const struct dcbnl_rtnl_ops fm10k_dcbnl_ops = {
149	.ieee_getets	= fm10k_dcbnl_ieee_getets,
150	.ieee_setets	= fm10k_dcbnl_ieee_setets,
151	.ieee_getpfc	= fm10k_dcbnl_ieee_getpfc,
152	.ieee_setpfc	= fm10k_dcbnl_ieee_setpfc,
153
154	.getdcbx	= fm10k_dcbnl_getdcbx,
155	.setdcbx	= fm10k_dcbnl_setdcbx,
156};
157
158#endif /* CONFIG_DCB */
159/**
160 * fm10k_dcbnl_set_ops - Configures dcbnl ops pointer for netdev
161 * @dev: netdev interface for the device
162 *
163 * Enables PF for DCB by assigning DCBNL ops pointer.
164 **/
165void fm10k_dcbnl_set_ops(struct net_device *dev)
166{
167#ifdef CONFIG_DCB
168	struct fm10k_intfc *interface = netdev_priv(dev);
169	struct fm10k_hw *hw = &interface->hw;
170
171	if (hw->mac.type == fm10k_mac_pf)
172		dev->dcbnl_ops = &fm10k_dcbnl_ops;
173#endif /* CONFIG_DCB */
174}
175