1 // SPDX-License-Identifier: GPL-2.0-only
2 /****************************************************************************
3 * Driver for Solarflare network controllers and boards
4 * Copyright 2005-2006 Fen Systems Ltd.
5 * Copyright 2006-2013 Solarflare Communications Inc.
6 */
7
8 #include <linux/netdevice.h>
9 #include <linux/ethtool.h>
10 #include <linux/rtnetlink.h>
11 #include <linux/in.h>
12 #include "net_driver.h"
13 #include "workarounds.h"
14 #include "selftest.h"
15 #include "efx.h"
16 #include "efx_channels.h"
17 #include "rx_common.h"
18 #include "tx_common.h"
19 #include "ethtool_common.h"
20 #include "filter.h"
21 #include "nic.h"
22
23 #define EFX_ETHTOOL_EEPROM_MAGIC 0xEFAB
24
25 /**************************************************************************
26 *
27 * Ethtool operations
28 *
29 **************************************************************************
30 */
31
32 /* Identify device by flashing LEDs */
efx_ethtool_phys_id(struct net_device * net_dev,enum ethtool_phys_id_state state)33 static int efx_ethtool_phys_id(struct net_device *net_dev,
34 enum ethtool_phys_id_state state)
35 {
36 struct efx_nic *efx = netdev_priv(net_dev);
37 enum efx_led_mode mode = EFX_LED_DEFAULT;
38
39 switch (state) {
40 case ETHTOOL_ID_ON:
41 mode = EFX_LED_ON;
42 break;
43 case ETHTOOL_ID_OFF:
44 mode = EFX_LED_OFF;
45 break;
46 case ETHTOOL_ID_INACTIVE:
47 mode = EFX_LED_DEFAULT;
48 break;
49 case ETHTOOL_ID_ACTIVE:
50 return 1; /* cycle on/off once per second */
51 }
52
53 return efx_mcdi_set_id_led(efx, mode);
54 }
55
efx_ethtool_get_regs_len(struct net_device * net_dev)56 static int efx_ethtool_get_regs_len(struct net_device *net_dev)
57 {
58 return efx_nic_get_regs_len(netdev_priv(net_dev));
59 }
60
efx_ethtool_get_regs(struct net_device * net_dev,struct ethtool_regs * regs,void * buf)61 static void efx_ethtool_get_regs(struct net_device *net_dev,
62 struct ethtool_regs *regs, void *buf)
63 {
64 struct efx_nic *efx = netdev_priv(net_dev);
65
66 regs->version = efx->type->revision;
67 efx_nic_get_regs(efx, buf);
68 }
69
70 /*
71 * Each channel has a single IRQ and moderation timer, started by any
72 * completion (or other event). Unless the module parameter
73 * separate_tx_channels is set, IRQs and moderation are therefore
74 * shared between RX and TX completions. In this case, when RX IRQ
75 * moderation is explicitly changed then TX IRQ moderation is
76 * automatically changed too, but otherwise we fail if the two values
77 * are requested to be different.
78 *
79 * The hardware does not support a limit on the number of completions
80 * before an IRQ, so we do not use the max_frames fields. We should
81 * report and require that max_frames == (usecs != 0), but this would
82 * invalidate existing user documentation.
83 *
84 * The hardware does not have distinct settings for interrupt
85 * moderation while the previous IRQ is being handled, so we should
86 * not use the 'irq' fields. However, an earlier developer
87 * misunderstood the meaning of the 'irq' fields and the driver did
88 * not support the standard fields. To avoid invalidating existing
89 * user documentation, we report and accept changes through either the
90 * standard or 'irq' fields. If both are changed at the same time, we
91 * prefer the standard field.
92 *
93 * We implement adaptive IRQ moderation, but use a different algorithm
94 * from that assumed in the definition of struct ethtool_coalesce.
95 * Therefore we do not use any of the adaptive moderation parameters
96 * in it.
97 */
98
efx_ethtool_get_coalesce(struct net_device * net_dev,struct ethtool_coalesce * coalesce)99 static int efx_ethtool_get_coalesce(struct net_device *net_dev,
100 struct ethtool_coalesce *coalesce)
101 {
102 struct efx_nic *efx = netdev_priv(net_dev);
103 unsigned int tx_usecs, rx_usecs;
104 bool rx_adaptive;
105
106 efx_get_irq_moderation(efx, &tx_usecs, &rx_usecs, &rx_adaptive);
107
108 coalesce->tx_coalesce_usecs = tx_usecs;
109 coalesce->tx_coalesce_usecs_irq = tx_usecs;
110 coalesce->rx_coalesce_usecs = rx_usecs;
111 coalesce->rx_coalesce_usecs_irq = rx_usecs;
112 coalesce->use_adaptive_rx_coalesce = rx_adaptive;
113
114 return 0;
115 }
116
efx_ethtool_set_coalesce(struct net_device * net_dev,struct ethtool_coalesce * coalesce)117 static int efx_ethtool_set_coalesce(struct net_device *net_dev,
118 struct ethtool_coalesce *coalesce)
119 {
120 struct efx_nic *efx = netdev_priv(net_dev);
121 struct efx_channel *channel;
122 unsigned int tx_usecs, rx_usecs;
123 bool adaptive, rx_may_override_tx;
124 int rc;
125
126 efx_get_irq_moderation(efx, &tx_usecs, &rx_usecs, &adaptive);
127
128 if (coalesce->rx_coalesce_usecs != rx_usecs)
129 rx_usecs = coalesce->rx_coalesce_usecs;
130 else
131 rx_usecs = coalesce->rx_coalesce_usecs_irq;
132
133 adaptive = coalesce->use_adaptive_rx_coalesce;
134
135 /* If channels are shared, TX IRQ moderation can be quietly
136 * overridden unless it is changed from its old value.
137 */
138 rx_may_override_tx = (coalesce->tx_coalesce_usecs == tx_usecs &&
139 coalesce->tx_coalesce_usecs_irq == tx_usecs);
140 if (coalesce->tx_coalesce_usecs != tx_usecs)
141 tx_usecs = coalesce->tx_coalesce_usecs;
142 else
143 tx_usecs = coalesce->tx_coalesce_usecs_irq;
144
145 rc = efx_init_irq_moderation(efx, tx_usecs, rx_usecs, adaptive,
146 rx_may_override_tx);
147 if (rc != 0)
148 return rc;
149
150 efx_for_each_channel(channel, efx)
151 efx->type->push_irq_moderation(channel);
152
153 return 0;
154 }
155
efx_ethtool_get_ringparam(struct net_device * net_dev,struct ethtool_ringparam * ring)156 static void efx_ethtool_get_ringparam(struct net_device *net_dev,
157 struct ethtool_ringparam *ring)
158 {
159 struct efx_nic *efx = netdev_priv(net_dev);
160
161 ring->rx_max_pending = EFX_MAX_DMAQ_SIZE;
162 ring->tx_max_pending = EFX_TXQ_MAX_ENT(efx);
163 ring->rx_pending = efx->rxq_entries;
164 ring->tx_pending = efx->txq_entries;
165 }
166
efx_ethtool_set_ringparam(struct net_device * net_dev,struct ethtool_ringparam * ring)167 static int efx_ethtool_set_ringparam(struct net_device *net_dev,
168 struct ethtool_ringparam *ring)
169 {
170 struct efx_nic *efx = netdev_priv(net_dev);
171 u32 txq_entries;
172
173 if (ring->rx_mini_pending || ring->rx_jumbo_pending ||
174 ring->rx_pending > EFX_MAX_DMAQ_SIZE ||
175 ring->tx_pending > EFX_TXQ_MAX_ENT(efx))
176 return -EINVAL;
177
178 if (ring->rx_pending < EFX_RXQ_MIN_ENT) {
179 netif_err(efx, drv, efx->net_dev,
180 "RX queues cannot be smaller than %u\n",
181 EFX_RXQ_MIN_ENT);
182 return -EINVAL;
183 }
184
185 txq_entries = max(ring->tx_pending, EFX_TXQ_MIN_ENT(efx));
186 if (txq_entries != ring->tx_pending)
187 netif_warn(efx, drv, efx->net_dev,
188 "increasing TX queue size to minimum of %u\n",
189 txq_entries);
190
191 return efx_realloc_channels(efx, ring->rx_pending, txq_entries);
192 }
193
efx_ethtool_get_wol(struct net_device * net_dev,struct ethtool_wolinfo * wol)194 static void efx_ethtool_get_wol(struct net_device *net_dev,
195 struct ethtool_wolinfo *wol)
196 {
197 struct efx_nic *efx = netdev_priv(net_dev);
198 return efx->type->get_wol(efx, wol);
199 }
200
201
efx_ethtool_set_wol(struct net_device * net_dev,struct ethtool_wolinfo * wol)202 static int efx_ethtool_set_wol(struct net_device *net_dev,
203 struct ethtool_wolinfo *wol)
204 {
205 struct efx_nic *efx = netdev_priv(net_dev);
206 return efx->type->set_wol(efx, wol->wolopts);
207 }
208
efx_ethtool_get_fec_stats(struct net_device * net_dev,struct ethtool_fec_stats * fec_stats)209 static void efx_ethtool_get_fec_stats(struct net_device *net_dev,
210 struct ethtool_fec_stats *fec_stats)
211 {
212 struct efx_nic *efx = netdev_priv(net_dev);
213
214 if (efx->type->get_fec_stats)
215 efx->type->get_fec_stats(efx, fec_stats);
216 }
217
efx_ethtool_get_ts_info(struct net_device * net_dev,struct ethtool_ts_info * ts_info)218 static int efx_ethtool_get_ts_info(struct net_device *net_dev,
219 struct ethtool_ts_info *ts_info)
220 {
221 struct efx_nic *efx = netdev_priv(net_dev);
222
223 /* Software capabilities */
224 ts_info->so_timestamping = (SOF_TIMESTAMPING_RX_SOFTWARE |
225 SOF_TIMESTAMPING_SOFTWARE);
226 ts_info->phc_index = -1;
227
228 efx_ptp_get_ts_info(efx, ts_info);
229 return 0;
230 }
231
232 const struct ethtool_ops efx_ethtool_ops = {
233 .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
234 ETHTOOL_COALESCE_USECS_IRQ |
235 ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
236 .get_drvinfo = efx_ethtool_get_drvinfo,
237 .get_regs_len = efx_ethtool_get_regs_len,
238 .get_regs = efx_ethtool_get_regs,
239 .get_msglevel = efx_ethtool_get_msglevel,
240 .set_msglevel = efx_ethtool_set_msglevel,
241 .get_link = ethtool_op_get_link,
242 .get_coalesce = efx_ethtool_get_coalesce,
243 .set_coalesce = efx_ethtool_set_coalesce,
244 .get_ringparam = efx_ethtool_get_ringparam,
245 .set_ringparam = efx_ethtool_set_ringparam,
246 .get_pauseparam = efx_ethtool_get_pauseparam,
247 .set_pauseparam = efx_ethtool_set_pauseparam,
248 .get_sset_count = efx_ethtool_get_sset_count,
249 .self_test = efx_ethtool_self_test,
250 .get_strings = efx_ethtool_get_strings,
251 .set_phys_id = efx_ethtool_phys_id,
252 .get_ethtool_stats = efx_ethtool_get_stats,
253 .get_wol = efx_ethtool_get_wol,
254 .set_wol = efx_ethtool_set_wol,
255 .reset = efx_ethtool_reset,
256 .get_rxnfc = efx_ethtool_get_rxnfc,
257 .set_rxnfc = efx_ethtool_set_rxnfc,
258 .get_rxfh_indir_size = efx_ethtool_get_rxfh_indir_size,
259 .get_rxfh_key_size = efx_ethtool_get_rxfh_key_size,
260 .get_rxfh = efx_ethtool_get_rxfh,
261 .set_rxfh = efx_ethtool_set_rxfh,
262 .get_rxfh_context = efx_ethtool_get_rxfh_context,
263 .set_rxfh_context = efx_ethtool_set_rxfh_context,
264 .get_ts_info = efx_ethtool_get_ts_info,
265 .get_module_info = efx_ethtool_get_module_info,
266 .get_module_eeprom = efx_ethtool_get_module_eeprom,
267 .get_link_ksettings = efx_ethtool_get_link_ksettings,
268 .set_link_ksettings = efx_ethtool_set_link_ksettings,
269 .get_fec_stats = efx_ethtool_get_fec_stats,
270 .get_fecparam = efx_ethtool_get_fecparam,
271 .set_fecparam = efx_ethtool_set_fecparam,
272 };
273