1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2013 - 2019 Intel Corporation. */
3
4#include "fm10k.h"
5
6/**
7 * fm10k_dcbnl_ieee_getets - get the ETS configuration for the device
8 * @dev: netdev interface for the device
9 * @ets: ETS structure to push configuration to
10 **/
11static int fm10k_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
12{
13	int i;
14
15	/* we support 8 TCs in all modes */
16	ets->ets_cap = IEEE_8021QAZ_MAX_TCS;
17	ets->cbs = 0;
18
19	/* we only support strict priority and cannot do traffic shaping */
20	memset(ets->tc_tx_bw, 0, sizeof(ets->tc_tx_bw));
21	memset(ets->tc_rx_bw, 0, sizeof(ets->tc_rx_bw));
22	memset(ets->tc_tsa, IEEE_8021QAZ_TSA_STRICT, sizeof(ets->tc_tsa));
23
24	/* populate the prio map based on the netdev */
25	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
26		ets->prio_tc[i] = netdev_get_prio_tc_map(dev, i);
27
28	return 0;
29}
30
31/**
32 * fm10k_dcbnl_ieee_setets - set the ETS configuration for the device
33 * @dev: netdev interface for the device
34 * @ets: ETS structure to pull configuration from
35 **/
36static int fm10k_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
37{
38	u8 num_tc = 0;
39	int i;
40
41	/* verify type and determine num_tcs needed */
42	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
43		if (ets->tc_tx_bw[i] || ets->tc_rx_bw[i])
44			return -EINVAL;
45		if (ets->tc_tsa[i] != IEEE_8021QAZ_TSA_STRICT)
46			return -EINVAL;
47		if (ets->prio_tc[i] > num_tc)
48			num_tc = ets->prio_tc[i];
49	}
50
51	/* if requested TC is greater than 0 then num_tcs is max + 1 */
52	if (num_tc)
53		num_tc++;
54
55	if (num_tc > IEEE_8021QAZ_MAX_TCS)
56		return -EINVAL;
57
58	/* update TC hardware mapping if necessary */
59	if (num_tc != netdev_get_num_tc(dev)) {
60		int err = fm10k_setup_tc(dev, num_tc);
61		if (err)
62			return err;
63	}
64
65	/* update priority mapping */
66	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
67		netdev_set_prio_tc_map(dev, i, ets->prio_tc[i]);
68
69	return 0;
70}
71
72/**
73 * fm10k_dcbnl_ieee_getpfc - get the PFC configuration for the device
74 * @dev: netdev interface for the device
75 * @pfc: PFC structure to push configuration to
76 **/
77static int fm10k_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
78{
79	struct fm10k_intfc *interface = netdev_priv(dev);
80
81	/* record flow control max count and state of TCs */
82	pfc->pfc_cap = IEEE_8021QAZ_MAX_TCS;
83	pfc->pfc_en = interface->pfc_en;
84
85	return 0;
86}
87
88/**
89 * fm10k_dcbnl_ieee_setpfc - set the PFC configuration for the device
90 * @dev: netdev interface for the device
91 * @pfc: PFC structure to pull configuration from
92 **/
93static int fm10k_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
94{
95	struct fm10k_intfc *interface = netdev_priv(dev);
96
97	/* record PFC configuration to interface */
98	interface->pfc_en = pfc->pfc_en;
99
100	/* if we are running update the drop_en state for all queues */
101	if (netif_running(dev))
102		fm10k_update_rx_drop_en(interface);
103
104	return 0;
105}
106
107/**
108 * fm10k_dcbnl_ieee_getdcbx - get the DCBX configuration for the device
109 * @dev: netdev interface for the device
110 *
111 * Returns that we support only IEEE DCB for this interface
112 **/
113static u8 fm10k_dcbnl_getdcbx(struct net_device __always_unused *dev)
114{
115	return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
116}
117
118/**
119 * fm10k_dcbnl_ieee_setdcbx - get the DCBX configuration for the device
120 * @dev: netdev interface for the device
121 * @mode: new mode for this device
122 *
123 * Returns error on attempt to enable anything but IEEE DCB for this interface
124 **/
125static u8 fm10k_dcbnl_setdcbx(struct net_device __always_unused *dev, u8 mode)
126{
127	return (mode != (DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE)) ? 1 : 0;
128}
129
130static const struct dcbnl_rtnl_ops fm10k_dcbnl_ops = {
131	.ieee_getets	= fm10k_dcbnl_ieee_getets,
132	.ieee_setets	= fm10k_dcbnl_ieee_setets,
133	.ieee_getpfc	= fm10k_dcbnl_ieee_getpfc,
134	.ieee_setpfc	= fm10k_dcbnl_ieee_setpfc,
135
136	.getdcbx	= fm10k_dcbnl_getdcbx,
137	.setdcbx	= fm10k_dcbnl_setdcbx,
138};
139
140/**
141 * fm10k_dcbnl_set_ops - Configures dcbnl ops pointer for netdev
142 * @dev: netdev interface for the device
143 *
144 * Enables PF for DCB by assigning DCBNL ops pointer.
145 **/
146void fm10k_dcbnl_set_ops(struct net_device *dev)
147{
148	struct fm10k_intfc *interface = netdev_priv(dev);
149	struct fm10k_hw *hw = &interface->hw;
150
151	if (hw->mac.type == fm10k_mac_pf)
152		dev->dcbnl_ops = &fm10k_dcbnl_ops;
153}
154