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_siena_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_siena_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_siena_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,struct kernel_ethtool_coalesce * kernel_coal,struct netlink_ext_ack * extack)99 static int efx_ethtool_get_coalesce(struct net_device *net_dev,
100 struct ethtool_coalesce *coalesce,
101 struct kernel_ethtool_coalesce *kernel_coal,
102 struct netlink_ext_ack *extack)
103 {
104 struct efx_nic *efx = netdev_priv(net_dev);
105 unsigned int tx_usecs, rx_usecs;
106 bool rx_adaptive;
107
108 efx_siena_get_irq_moderation(efx, &tx_usecs, &rx_usecs, &rx_adaptive);
109
110 coalesce->tx_coalesce_usecs = tx_usecs;
111 coalesce->tx_coalesce_usecs_irq = tx_usecs;
112 coalesce->rx_coalesce_usecs = rx_usecs;
113 coalesce->rx_coalesce_usecs_irq = rx_usecs;
114 coalesce->use_adaptive_rx_coalesce = rx_adaptive;
115
116 return 0;
117 }
118
efx_ethtool_set_coalesce(struct net_device * net_dev,struct ethtool_coalesce * coalesce,struct kernel_ethtool_coalesce * kernel_coal,struct netlink_ext_ack * extack)119 static int efx_ethtool_set_coalesce(struct net_device *net_dev,
120 struct ethtool_coalesce *coalesce,
121 struct kernel_ethtool_coalesce *kernel_coal,
122 struct netlink_ext_ack *extack)
123 {
124 struct efx_nic *efx = netdev_priv(net_dev);
125 struct efx_channel *channel;
126 unsigned int tx_usecs, rx_usecs;
127 bool adaptive, rx_may_override_tx;
128 int rc;
129
130 efx_siena_get_irq_moderation(efx, &tx_usecs, &rx_usecs, &adaptive);
131
132 if (coalesce->rx_coalesce_usecs != rx_usecs)
133 rx_usecs = coalesce->rx_coalesce_usecs;
134 else
135 rx_usecs = coalesce->rx_coalesce_usecs_irq;
136
137 adaptive = coalesce->use_adaptive_rx_coalesce;
138
139 /* If channels are shared, TX IRQ moderation can be quietly
140 * overridden unless it is changed from its old value.
141 */
142 rx_may_override_tx = (coalesce->tx_coalesce_usecs == tx_usecs &&
143 coalesce->tx_coalesce_usecs_irq == tx_usecs);
144 if (coalesce->tx_coalesce_usecs != tx_usecs)
145 tx_usecs = coalesce->tx_coalesce_usecs;
146 else
147 tx_usecs = coalesce->tx_coalesce_usecs_irq;
148
149 rc = efx_siena_init_irq_moderation(efx, tx_usecs, rx_usecs, adaptive,
150 rx_may_override_tx);
151 if (rc != 0)
152 return rc;
153
154 efx_for_each_channel(channel, efx)
155 efx->type->push_irq_moderation(channel);
156
157 return 0;
158 }
159
160 static void
efx_ethtool_get_ringparam(struct net_device * net_dev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)161 efx_ethtool_get_ringparam(struct net_device *net_dev,
162 struct ethtool_ringparam *ring,
163 struct kernel_ethtool_ringparam *kernel_ring,
164 struct netlink_ext_ack *extack)
165 {
166 struct efx_nic *efx = netdev_priv(net_dev);
167
168 ring->rx_max_pending = EFX_MAX_DMAQ_SIZE;
169 ring->tx_max_pending = EFX_TXQ_MAX_ENT(efx);
170 ring->rx_pending = efx->rxq_entries;
171 ring->tx_pending = efx->txq_entries;
172 }
173
174 static int
efx_ethtool_set_ringparam(struct net_device * net_dev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)175 efx_ethtool_set_ringparam(struct net_device *net_dev,
176 struct ethtool_ringparam *ring,
177 struct kernel_ethtool_ringparam *kernel_ring,
178 struct netlink_ext_ack *extack)
179 {
180 struct efx_nic *efx = netdev_priv(net_dev);
181 u32 txq_entries;
182
183 if (ring->rx_mini_pending || ring->rx_jumbo_pending ||
184 ring->rx_pending > EFX_MAX_DMAQ_SIZE ||
185 ring->tx_pending > EFX_TXQ_MAX_ENT(efx))
186 return -EINVAL;
187
188 if (ring->rx_pending < EFX_RXQ_MIN_ENT) {
189 netif_err(efx, drv, efx->net_dev,
190 "RX queues cannot be smaller than %u\n",
191 EFX_RXQ_MIN_ENT);
192 return -EINVAL;
193 }
194
195 txq_entries = max(ring->tx_pending, EFX_TXQ_MIN_ENT(efx));
196 if (txq_entries != ring->tx_pending)
197 netif_warn(efx, drv, efx->net_dev,
198 "increasing TX queue size to minimum of %u\n",
199 txq_entries);
200
201 return efx_siena_realloc_channels(efx, ring->rx_pending, txq_entries);
202 }
203
efx_ethtool_get_wol(struct net_device * net_dev,struct ethtool_wolinfo * wol)204 static void efx_ethtool_get_wol(struct net_device *net_dev,
205 struct ethtool_wolinfo *wol)
206 {
207 struct efx_nic *efx = netdev_priv(net_dev);
208 return efx->type->get_wol(efx, wol);
209 }
210
211
efx_ethtool_set_wol(struct net_device * net_dev,struct ethtool_wolinfo * wol)212 static int efx_ethtool_set_wol(struct net_device *net_dev,
213 struct ethtool_wolinfo *wol)
214 {
215 struct efx_nic *efx = netdev_priv(net_dev);
216 return efx->type->set_wol(efx, wol->wolopts);
217 }
218
efx_ethtool_get_fec_stats(struct net_device * net_dev,struct ethtool_fec_stats * fec_stats)219 static void efx_ethtool_get_fec_stats(struct net_device *net_dev,
220 struct ethtool_fec_stats *fec_stats)
221 {
222 struct efx_nic *efx = netdev_priv(net_dev);
223
224 if (efx->type->get_fec_stats)
225 efx->type->get_fec_stats(efx, fec_stats);
226 }
227
efx_ethtool_get_ts_info(struct net_device * net_dev,struct kernel_ethtool_ts_info * ts_info)228 static int efx_ethtool_get_ts_info(struct net_device *net_dev,
229 struct kernel_ethtool_ts_info *ts_info)
230 {
231 struct efx_nic *efx = netdev_priv(net_dev);
232
233 efx_siena_ptp_get_ts_info(efx, ts_info);
234 return 0;
235 }
236
237 const struct ethtool_ops efx_siena_ethtool_ops = {
238 .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
239 ETHTOOL_COALESCE_USECS_IRQ |
240 ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
241 .get_drvinfo = efx_siena_ethtool_get_drvinfo,
242 .get_regs_len = efx_ethtool_get_regs_len,
243 .get_regs = efx_ethtool_get_regs,
244 .get_msglevel = efx_siena_ethtool_get_msglevel,
245 .set_msglevel = efx_siena_ethtool_set_msglevel,
246 .get_link = ethtool_op_get_link,
247 .get_coalesce = efx_ethtool_get_coalesce,
248 .set_coalesce = efx_ethtool_set_coalesce,
249 .get_ringparam = efx_ethtool_get_ringparam,
250 .set_ringparam = efx_ethtool_set_ringparam,
251 .get_pauseparam = efx_siena_ethtool_get_pauseparam,
252 .set_pauseparam = efx_siena_ethtool_set_pauseparam,
253 .get_sset_count = efx_siena_ethtool_get_sset_count,
254 .self_test = efx_siena_ethtool_self_test,
255 .get_strings = efx_siena_ethtool_get_strings,
256 .set_phys_id = efx_ethtool_phys_id,
257 .get_ethtool_stats = efx_siena_ethtool_get_stats,
258 .get_wol = efx_ethtool_get_wol,
259 .set_wol = efx_ethtool_set_wol,
260 .reset = efx_siena_ethtool_reset,
261 .get_rxnfc = efx_siena_ethtool_get_rxnfc,
262 .set_rxnfc = efx_siena_ethtool_set_rxnfc,
263 .get_rxfh_indir_size = efx_siena_ethtool_get_rxfh_indir_size,
264 .get_rxfh_key_size = efx_siena_ethtool_get_rxfh_key_size,
265 .get_rxfh = efx_siena_ethtool_get_rxfh,
266 .set_rxfh = efx_siena_ethtool_set_rxfh,
267 .get_ts_info = efx_ethtool_get_ts_info,
268 .get_module_info = efx_siena_ethtool_get_module_info,
269 .get_module_eeprom = efx_siena_ethtool_get_module_eeprom,
270 .get_link_ksettings = efx_siena_ethtool_get_link_ksettings,
271 .set_link_ksettings = efx_siena_ethtool_set_link_ksettings,
272 .get_fec_stats = efx_ethtool_get_fec_stats,
273 .get_fecparam = efx_siena_ethtool_get_fecparam,
274 .set_fecparam = efx_siena_ethtool_set_fecparam,
275 };
276