1/*
2 * Copyright (c) 2013 Johannes Berg <johannes@sipsolutions.net>
3 *
4 *  This file is free software: you may copy, redistribute and/or modify it
5 *  under the terms of the GNU General Public License as published by the
6 *  Free Software Foundation, either version 2 of the License, or (at your
7 *  option) any later version.
8 *
9 *  This file is distributed in the hope that it will be useful, but
10 *  WITHOUT ANY WARRANTY; without even the implied warranty of
11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 *  General Public License for more details.
13 *
14 *  You should have received a copy of the GNU General Public License
15 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
16 *
17 * This file incorporates work covered by the following copyright and
18 * permission notice:
19 *
20 * Copyright (c) 2012 Qualcomm Atheros, Inc.
21 *
22 * Permission to use, copy, modify, and/or distribute this software for any
23 * purpose with or without fee is hereby granted, provided that the above
24 * copyright notice and this permission notice appear in all copies.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
27 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
29 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
30 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
31 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
32 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
33 */
34
35#include <linux/pci.h>
36#include <linux/ip.h>
37#include <linux/tcp.h>
38#include <linux/netdevice.h>
39#include <linux/etherdevice.h>
40#include <linux/ethtool.h>
41#include <linux/mdio.h>
42#include <linux/interrupt.h>
43#include <asm/byteorder.h>
44
45#include "alx.h"
46#include "reg.h"
47#include "hw.h"
48
49/* The order of these strings must match the order of the fields in
50 * struct alx_hw_stats
51 * See hw.h
52 */
53static const char alx_gstrings_stats[][ETH_GSTRING_LEN] = {
54	"rx_packets",
55	"rx_bcast_packets",
56	"rx_mcast_packets",
57	"rx_pause_packets",
58	"rx_ctrl_packets",
59	"rx_fcs_errors",
60	"rx_length_errors",
61	"rx_bytes",
62	"rx_runt_packets",
63	"rx_fragments",
64	"rx_64B_or_less_packets",
65	"rx_65B_to_127B_packets",
66	"rx_128B_to_255B_packets",
67	"rx_256B_to_511B_packets",
68	"rx_512B_to_1023B_packets",
69	"rx_1024B_to_1518B_packets",
70	"rx_1519B_to_mtu_packets",
71	"rx_oversize_packets",
72	"rx_rxf_ov_drop_packets",
73	"rx_rrd_ov_drop_packets",
74	"rx_align_errors",
75	"rx_bcast_bytes",
76	"rx_mcast_bytes",
77	"rx_address_errors",
78	"tx_packets",
79	"tx_bcast_packets",
80	"tx_mcast_packets",
81	"tx_pause_packets",
82	"tx_exc_defer_packets",
83	"tx_ctrl_packets",
84	"tx_defer_packets",
85	"tx_bytes",
86	"tx_64B_or_less_packets",
87	"tx_65B_to_127B_packets",
88	"tx_128B_to_255B_packets",
89	"tx_256B_to_511B_packets",
90	"tx_512B_to_1023B_packets",
91	"tx_1024B_to_1518B_packets",
92	"tx_1519B_to_mtu_packets",
93	"tx_single_collision",
94	"tx_multiple_collisions",
95	"tx_late_collision",
96	"tx_abort_collision",
97	"tx_underrun",
98	"tx_trd_eop",
99	"tx_length_errors",
100	"tx_trunc_packets",
101	"tx_bcast_bytes",
102	"tx_mcast_bytes",
103	"tx_update",
104};
105
106#define ALX_NUM_STATS ARRAY_SIZE(alx_gstrings_stats)
107
108
109static u32 alx_get_supported_speeds(struct alx_hw *hw)
110{
111	u32 supported = SUPPORTED_10baseT_Half |
112			SUPPORTED_10baseT_Full |
113			SUPPORTED_100baseT_Half |
114			SUPPORTED_100baseT_Full;
115
116	if (alx_hw_giga(hw))
117		supported |= SUPPORTED_1000baseT_Full;
118
119	BUILD_BUG_ON(SUPPORTED_10baseT_Half != ADVERTISED_10baseT_Half);
120	BUILD_BUG_ON(SUPPORTED_10baseT_Full != ADVERTISED_10baseT_Full);
121	BUILD_BUG_ON(SUPPORTED_100baseT_Half != ADVERTISED_100baseT_Half);
122	BUILD_BUG_ON(SUPPORTED_100baseT_Full != ADVERTISED_100baseT_Full);
123	BUILD_BUG_ON(SUPPORTED_1000baseT_Full != ADVERTISED_1000baseT_Full);
124
125	return supported;
126}
127
128static int alx_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
129{
130	struct alx_priv *alx = netdev_priv(netdev);
131	struct alx_hw *hw = &alx->hw;
132
133	ecmd->supported = SUPPORTED_Autoneg |
134			  SUPPORTED_TP |
135			  SUPPORTED_Pause |
136			  SUPPORTED_Asym_Pause;
137	if (alx_hw_giga(hw))
138		ecmd->supported |= SUPPORTED_1000baseT_Full;
139	ecmd->supported |= alx_get_supported_speeds(hw);
140
141	ecmd->advertising = ADVERTISED_TP;
142	if (hw->adv_cfg & ADVERTISED_Autoneg)
143		ecmd->advertising |= hw->adv_cfg;
144
145	ecmd->port = PORT_TP;
146	ecmd->phy_address = 0;
147
148	if (hw->adv_cfg & ADVERTISED_Autoneg)
149		ecmd->autoneg = AUTONEG_ENABLE;
150	else
151		ecmd->autoneg = AUTONEG_DISABLE;
152	ecmd->transceiver = XCVR_INTERNAL;
153
154	if (hw->flowctrl & ALX_FC_ANEG && hw->adv_cfg & ADVERTISED_Autoneg) {
155		if (hw->flowctrl & ALX_FC_RX) {
156			ecmd->advertising |= ADVERTISED_Pause;
157
158			if (!(hw->flowctrl & ALX_FC_TX))
159				ecmd->advertising |= ADVERTISED_Asym_Pause;
160		} else if (hw->flowctrl & ALX_FC_TX) {
161			ecmd->advertising |= ADVERTISED_Asym_Pause;
162		}
163	}
164
165	ethtool_cmd_speed_set(ecmd, hw->link_speed);
166	ecmd->duplex = hw->duplex;
167
168	return 0;
169}
170
171static int alx_set_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
172{
173	struct alx_priv *alx = netdev_priv(netdev);
174	struct alx_hw *hw = &alx->hw;
175	u32 adv_cfg;
176
177	ASSERT_RTNL();
178
179	if (ecmd->autoneg == AUTONEG_ENABLE) {
180		if (ecmd->advertising & ~alx_get_supported_speeds(hw))
181			return -EINVAL;
182		adv_cfg = ecmd->advertising | ADVERTISED_Autoneg;
183	} else {
184		adv_cfg = alx_speed_to_ethadv(ethtool_cmd_speed(ecmd),
185					      ecmd->duplex);
186
187		if (!adv_cfg || adv_cfg == ADVERTISED_1000baseT_Full)
188			return -EINVAL;
189	}
190
191	hw->adv_cfg = adv_cfg;
192	return alx_setup_speed_duplex(hw, adv_cfg, hw->flowctrl);
193}
194
195static void alx_get_pauseparam(struct net_device *netdev,
196			       struct ethtool_pauseparam *pause)
197{
198	struct alx_priv *alx = netdev_priv(netdev);
199	struct alx_hw *hw = &alx->hw;
200
201	pause->autoneg = !!(hw->flowctrl & ALX_FC_ANEG &&
202			    hw->adv_cfg & ADVERTISED_Autoneg);
203	pause->tx_pause = !!(hw->flowctrl & ALX_FC_TX);
204	pause->rx_pause = !!(hw->flowctrl & ALX_FC_RX);
205}
206
207
208static int alx_set_pauseparam(struct net_device *netdev,
209			      struct ethtool_pauseparam *pause)
210{
211	struct alx_priv *alx = netdev_priv(netdev);
212	struct alx_hw *hw = &alx->hw;
213	int err = 0;
214	bool reconfig_phy = false;
215	u8 fc = 0;
216
217	if (pause->tx_pause)
218		fc |= ALX_FC_TX;
219	if (pause->rx_pause)
220		fc |= ALX_FC_RX;
221	if (pause->autoneg)
222		fc |= ALX_FC_ANEG;
223
224	ASSERT_RTNL();
225
226	/* restart auto-neg for auto-mode */
227	if (hw->adv_cfg & ADVERTISED_Autoneg) {
228		if (!((fc ^ hw->flowctrl) & ALX_FC_ANEG))
229			reconfig_phy = true;
230		if (fc & hw->flowctrl & ALX_FC_ANEG &&
231		    (fc ^ hw->flowctrl) & (ALX_FC_RX | ALX_FC_TX))
232			reconfig_phy = true;
233	}
234
235	if (reconfig_phy) {
236		err = alx_setup_speed_duplex(hw, hw->adv_cfg, fc);
237		if (err)
238			return err;
239	}
240
241	/* flow control on mac */
242	if ((fc ^ hw->flowctrl) & (ALX_FC_RX | ALX_FC_TX))
243		alx_cfg_mac_flowcontrol(hw, fc);
244
245	hw->flowctrl = fc;
246
247	return 0;
248}
249
250static u32 alx_get_msglevel(struct net_device *netdev)
251{
252	struct alx_priv *alx = netdev_priv(netdev);
253
254	return alx->msg_enable;
255}
256
257static void alx_set_msglevel(struct net_device *netdev, u32 data)
258{
259	struct alx_priv *alx = netdev_priv(netdev);
260
261	alx->msg_enable = data;
262}
263
264static void alx_get_ethtool_stats(struct net_device *netdev,
265				  struct ethtool_stats *estats, u64 *data)
266{
267	struct alx_priv *alx = netdev_priv(netdev);
268	struct alx_hw *hw = &alx->hw;
269
270	spin_lock(&alx->stats_lock);
271
272	alx_update_hw_stats(hw);
273	BUILD_BUG_ON(sizeof(hw->stats) - offsetof(struct alx_hw_stats, rx_ok) <
274		     ALX_NUM_STATS * sizeof(u64));
275	memcpy(data, &hw->stats.rx_ok, ALX_NUM_STATS * sizeof(u64));
276
277	spin_unlock(&alx->stats_lock);
278}
279
280static void alx_get_strings(struct net_device *netdev, u32 stringset, u8 *buf)
281{
282	switch (stringset) {
283	case ETH_SS_STATS:
284		memcpy(buf, &alx_gstrings_stats, sizeof(alx_gstrings_stats));
285		break;
286	default:
287		WARN_ON(1);
288		break;
289	}
290}
291
292static int alx_get_sset_count(struct net_device *netdev, int sset)
293{
294	switch (sset) {
295	case ETH_SS_STATS:
296		return ALX_NUM_STATS;
297	default:
298		return -EINVAL;
299	}
300}
301
302const struct ethtool_ops alx_ethtool_ops = {
303	.get_settings	= alx_get_settings,
304	.set_settings	= alx_set_settings,
305	.get_pauseparam	= alx_get_pauseparam,
306	.set_pauseparam	= alx_set_pauseparam,
307	.get_msglevel	= alx_get_msglevel,
308	.set_msglevel	= alx_set_msglevel,
309	.get_link	= ethtool_op_get_link,
310	.get_strings	= alx_get_strings,
311	.get_sset_count	= alx_get_sset_count,
312	.get_ethtool_stats	= alx_get_ethtool_stats,
313};
314