1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright IBM Corp. 2018
6 #define KMSG_COMPONENT "qeth"
7 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
9 #include <linux/ethtool.h>
10 #include "qeth_core.h"
13 #define QETH_TXQ_STAT(_name, _stat) { \
15 .offset = offsetof(struct qeth_out_q_stats, _stat) \
18 #define QETH_CARD_STAT(_name, _stat) { \
20 .offset = offsetof(struct qeth_card_stats, _stat) \
24 char name[ETH_GSTRING_LEN];
28 static const struct qeth_stats txq_stats[] = {
29 QETH_TXQ_STAT("IO buffers", bufs),
30 QETH_TXQ_STAT("IO buffer elements", buf_elements),
31 QETH_TXQ_STAT("packed IO buffers", bufs_pack),
32 QETH_TXQ_STAT("skbs", tx_packets),
33 QETH_TXQ_STAT("packed skbs", skbs_pack),
34 QETH_TXQ_STAT("SG skbs", skbs_sg),
35 QETH_TXQ_STAT("HW csum skbs", skbs_csum),
36 QETH_TXQ_STAT("TSO skbs", skbs_tso),
37 QETH_TXQ_STAT("linearized skbs", skbs_linearized),
38 QETH_TXQ_STAT("linearized+error skbs", skbs_linearized_fail),
39 QETH_TXQ_STAT("TSO bytes", tso_bytes),
40 QETH_TXQ_STAT("Packing mode switches", packing_mode_switch),
41 QETH_TXQ_STAT("Queue stopped", stopped),
42 QETH_TXQ_STAT("Doorbell", doorbell),
43 QETH_TXQ_STAT("IRQ for frames", coal_frames),
44 QETH_TXQ_STAT("Completion IRQ", completion_irq),
45 QETH_TXQ_STAT("Completion yield", completion_yield),
46 QETH_TXQ_STAT("Completion timer", completion_timer),
49 static const struct qeth_stats card_stats[] = {
50 QETH_CARD_STAT("rx0 IO buffers", rx_bufs),
51 QETH_CARD_STAT("rx0 HW csum skbs", rx_skb_csum),
52 QETH_CARD_STAT("rx0 SG skbs", rx_sg_skbs),
53 QETH_CARD_STAT("rx0 SG page frags", rx_sg_frags),
54 QETH_CARD_STAT("rx0 SG page allocs", rx_sg_alloc_page),
55 QETH_CARD_STAT("rx0 dropped, no memory", rx_dropped_nomem),
56 QETH_CARD_STAT("rx0 dropped, bad format", rx_dropped_notsupp),
57 QETH_CARD_STAT("rx0 dropped, runt", rx_dropped_runt),
60 #define TXQ_STATS_LEN ARRAY_SIZE(txq_stats)
61 #define CARD_STATS_LEN ARRAY_SIZE(card_stats)
63 static void qeth_add_stat_data(u64 **dst, void *src,
64 const struct qeth_stats stats[],
70 for (i = 0; i < size; i++) {
71 stat = (char *)src + stats[i].offset;
77 static void qeth_add_stat_strings(u8 **data, const char *prefix,
78 const struct qeth_stats stats[],
83 for (i = 0; i < size; i++) {
84 snprintf(*data, ETH_GSTRING_LEN, "%s%s", prefix, stats[i].name);
85 *data += ETH_GSTRING_LEN;
89 static int qeth_get_sset_count(struct net_device *dev, int stringset)
91 struct qeth_card *card = dev->ml_priv;
95 return CARD_STATS_LEN +
96 card->qdio.no_out_queues * TXQ_STATS_LEN;
102 static void qeth_get_ethtool_stats(struct net_device *dev,
103 struct ethtool_stats *stats, u64 *data)
105 struct qeth_card *card = dev->ml_priv;
108 qeth_add_stat_data(&data, &card->stats, card_stats, CARD_STATS_LEN);
109 for (i = 0; i < card->qdio.no_out_queues; i++)
110 qeth_add_stat_data(&data, &card->qdio.out_qs[i]->stats,
111 txq_stats, TXQ_STATS_LEN);
114 static void __qeth_set_coalesce(struct net_device *dev,
115 struct qeth_qdio_out_q *queue,
116 struct ethtool_coalesce *coal)
118 WRITE_ONCE(queue->coalesce_usecs, coal->tx_coalesce_usecs);
119 WRITE_ONCE(queue->max_coalesced_frames, coal->tx_max_coalesced_frames);
121 if (coal->tx_coalesce_usecs &&
122 netif_running(dev) &&
123 !qeth_out_queue_is_empty(queue))
124 qeth_tx_arm_timer(queue, coal->tx_coalesce_usecs);
127 static int qeth_set_coalesce(struct net_device *dev,
128 struct ethtool_coalesce *coal)
130 struct qeth_card *card = dev->ml_priv;
131 struct qeth_qdio_out_q *queue;
137 if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
140 qeth_for_each_output_queue(card, queue, i)
141 __qeth_set_coalesce(dev, queue, coal);
146 static void qeth_get_ringparam(struct net_device *dev,
147 struct ethtool_ringparam *param)
149 struct qeth_card *card = dev->ml_priv;
151 param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
152 param->rx_mini_max_pending = 0;
153 param->rx_jumbo_max_pending = 0;
154 param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
156 param->rx_pending = card->qdio.in_buf_pool.buf_count;
157 param->rx_mini_pending = 0;
158 param->rx_jumbo_pending = 0;
159 param->tx_pending = QDIO_MAX_BUFFERS_PER_Q;
162 static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
164 struct qeth_card *card = dev->ml_priv;
165 char prefix[ETH_GSTRING_LEN] = "";
170 qeth_add_stat_strings(&data, prefix, card_stats,
172 for (i = 0; i < card->qdio.no_out_queues; i++) {
173 snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
174 qeth_add_stat_strings(&data, prefix, txq_stats,
184 static void qeth_get_drvinfo(struct net_device *dev,
185 struct ethtool_drvinfo *info)
187 struct qeth_card *card = dev->ml_priv;
189 strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
190 sizeof(info->driver));
191 strlcpy(info->fw_version, card->info.mcl_level,
192 sizeof(info->fw_version));
193 snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
194 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
197 static void qeth_get_channels(struct net_device *dev,
198 struct ethtool_channels *channels)
200 struct qeth_card *card = dev->ml_priv;
202 channels->max_rx = dev->num_rx_queues;
203 channels->max_tx = card->qdio.no_out_queues;
204 channels->max_other = 0;
205 channels->max_combined = 0;
206 channels->rx_count = dev->real_num_rx_queues;
207 channels->tx_count = dev->real_num_tx_queues;
208 channels->other_count = 0;
209 channels->combined_count = 0;
212 static int qeth_set_channels(struct net_device *dev,
213 struct ethtool_channels *channels)
215 struct qeth_priv *priv = netdev_priv(dev);
216 struct qeth_card *card = dev->ml_priv;
219 if (channels->rx_count == 0 || channels->tx_count == 0)
221 if (channels->tx_count > card->qdio.no_out_queues)
224 /* Prio-queueing needs all TX queues: */
225 if (qeth_uses_tx_prio_queueing(card))
229 if (channels->tx_count < QETH_IQD_MIN_TXQ)
232 /* Reject downgrade while running. It could push displaced
233 * ucast flows onto txq0, which is reserved for mcast.
235 if (netif_running(dev) &&
236 channels->tx_count < dev->real_num_tx_queues)
240 rc = qeth_set_real_num_tx_queues(card, channels->tx_count);
242 priv->tx_wanted_queues = channels->tx_count;
247 static int qeth_get_ts_info(struct net_device *dev,
248 struct ethtool_ts_info *info)
250 struct qeth_card *card = dev->ml_priv;
255 return ethtool_op_get_ts_info(dev, info);
258 static int qeth_get_tunable(struct net_device *dev,
259 const struct ethtool_tunable *tuna, void *data)
261 struct qeth_priv *priv = netdev_priv(dev);
264 case ETHTOOL_RX_COPYBREAK:
265 *(u32 *)data = priv->rx_copybreak;
272 static int qeth_set_tunable(struct net_device *dev,
273 const struct ethtool_tunable *tuna,
276 struct qeth_priv *priv = netdev_priv(dev);
279 case ETHTOOL_RX_COPYBREAK:
280 WRITE_ONCE(priv->rx_copybreak, *(u32 *)data);
287 static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
288 struct ethtool_coalesce *coal)
290 struct qeth_card *card = dev->ml_priv;
291 struct qeth_qdio_out_q *queue;
296 if (__queue >= card->qdio.no_out_queues)
299 queue = card->qdio.out_qs[__queue];
301 coal->tx_coalesce_usecs = queue->coalesce_usecs;
302 coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
306 static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
307 struct ethtool_coalesce *coal)
309 struct qeth_card *card = dev->ml_priv;
314 if (queue >= card->qdio.no_out_queues)
317 if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
320 __qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal);
324 /* Helper function to fill 'advertising' and 'supported' which are the same. */
325 /* Autoneg and full-duplex are supported and advertised unconditionally. */
326 /* Always advertise and support all speeds up to specified, and only one */
327 /* specified port type. */
328 static void qeth_set_ethtool_link_modes(struct ethtool_link_ksettings *cmd,
329 enum qeth_link_mode link_mode)
331 ethtool_link_ksettings_zero_link_mode(cmd, supported);
332 ethtool_link_ksettings_zero_link_mode(cmd, advertising);
333 ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
335 ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
336 ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
338 switch (cmd->base.port) {
340 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
341 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
343 switch (cmd->base.speed) {
345 ethtool_link_ksettings_add_link_mode(cmd, supported,
347 ethtool_link_ksettings_add_link_mode(cmd, advertising,
351 ethtool_link_ksettings_add_link_mode(cmd, supported,
353 ethtool_link_ksettings_add_link_mode(cmd, advertising,
355 ethtool_link_ksettings_add_link_mode(cmd, supported,
357 ethtool_link_ksettings_add_link_mode(cmd, advertising,
361 ethtool_link_ksettings_add_link_mode(cmd, supported,
363 ethtool_link_ksettings_add_link_mode(cmd, advertising,
365 ethtool_link_ksettings_add_link_mode(cmd, supported,
367 ethtool_link_ksettings_add_link_mode(cmd, advertising,
371 ethtool_link_ksettings_add_link_mode(cmd, supported,
373 ethtool_link_ksettings_add_link_mode(cmd, advertising,
375 ethtool_link_ksettings_add_link_mode(cmd, supported,
377 ethtool_link_ksettings_add_link_mode(cmd, advertising,
386 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
387 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
389 switch (cmd->base.speed) {
391 ethtool_link_ksettings_add_link_mode(cmd, supported,
393 ethtool_link_ksettings_add_link_mode(cmd, advertising,
397 if (link_mode == QETH_LINK_MODE_FIBRE_LONG) {
398 ethtool_link_ksettings_add_link_mode(cmd, supported,
400 ethtool_link_ksettings_add_link_mode(cmd, advertising,
402 } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) {
403 ethtool_link_ksettings_add_link_mode(cmd, supported,
405 ethtool_link_ksettings_add_link_mode(cmd, advertising,
410 ethtool_link_ksettings_add_link_mode(cmd, supported,
412 ethtool_link_ksettings_add_link_mode(cmd, advertising,
425 static int qeth_get_link_ksettings(struct net_device *netdev,
426 struct ethtool_link_ksettings *cmd)
428 struct qeth_card *card = netdev->ml_priv;
429 struct qeth_link_info link_info;
431 cmd->base.speed = card->info.link_info.speed;
432 cmd->base.duplex = card->info.link_info.duplex;
433 cmd->base.port = card->info.link_info.port;
434 cmd->base.autoneg = AUTONEG_ENABLE;
435 cmd->base.phy_address = 0;
436 cmd->base.mdio_support = 0;
437 cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
438 cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
440 /* Check if we can obtain more accurate information. */
441 if (!qeth_query_card_info(card, &link_info)) {
442 if (link_info.speed != SPEED_UNKNOWN)
443 cmd->base.speed = link_info.speed;
444 if (link_info.duplex != DUPLEX_UNKNOWN)
445 cmd->base.duplex = link_info.duplex;
446 if (link_info.port != PORT_OTHER)
447 cmd->base.port = link_info.port;
450 qeth_set_ethtool_link_modes(cmd, card->info.link_info.link_mode);
455 const struct ethtool_ops qeth_ethtool_ops = {
456 .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
457 ETHTOOL_COALESCE_TX_MAX_FRAMES,
458 .get_link = ethtool_op_get_link,
459 .set_coalesce = qeth_set_coalesce,
460 .get_ringparam = qeth_get_ringparam,
461 .get_strings = qeth_get_strings,
462 .get_ethtool_stats = qeth_get_ethtool_stats,
463 .get_sset_count = qeth_get_sset_count,
464 .get_drvinfo = qeth_get_drvinfo,
465 .get_channels = qeth_get_channels,
466 .set_channels = qeth_set_channels,
467 .get_ts_info = qeth_get_ts_info,
468 .get_tunable = qeth_get_tunable,
469 .set_tunable = qeth_set_tunable,
470 .get_per_queue_coalesce = qeth_get_per_queue_coalesce,
471 .set_per_queue_coalesce = qeth_set_per_queue_coalesce,
472 .get_link_ksettings = qeth_get_link_ksettings,
475 const struct ethtool_ops qeth_osn_ethtool_ops = {
476 .get_strings = qeth_get_strings,
477 .get_ethtool_stats = qeth_get_ethtool_stats,
478 .get_sset_count = qeth_get_sset_count,
479 .get_drvinfo = qeth_get_drvinfo,