1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 10G controller driver for Samsung SoCs
3 *
4 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com
6 *
7 * Author: Siva Reddy Kallam <siva.kallam@samsung.com>
8 */
9
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12 #include <linux/clk.h>
13 #include <linux/interrupt.h>
14 #include <linux/kernel.h>
15 #include <linux/netdevice.h>
16 #include <linux/net_tstamp.h>
17 #include <linux/phy.h>
18 #include <linux/ptp_clock_kernel.h>
19
20 #include "sxgbe_common.h"
21 #include "sxgbe_reg.h"
22 #include "sxgbe_dma.h"
23
24 struct sxgbe_stats {
25 char stat_string[ETH_GSTRING_LEN];
26 int sizeof_stat;
27 int stat_offset;
28 };
29
30 #define SXGBE_STAT(m) \
31 { \
32 #m, \
33 sizeof_field(struct sxgbe_extra_stats, m), \
34 offsetof(struct sxgbe_priv_data, xstats.m) \
35 }
36
37 static const struct sxgbe_stats sxgbe_gstrings_stats[] = {
38 /* TX/RX IRQ events */
39 SXGBE_STAT(tx_process_stopped_irq),
40 SXGBE_STAT(tx_ctxt_desc_err),
41 SXGBE_STAT(tx_threshold),
42 SXGBE_STAT(rx_threshold),
43 SXGBE_STAT(tx_pkt_n),
44 SXGBE_STAT(rx_pkt_n),
45 SXGBE_STAT(normal_irq_n),
46 SXGBE_STAT(tx_normal_irq_n),
47 SXGBE_STAT(rx_normal_irq_n),
48 SXGBE_STAT(napi_poll),
49 SXGBE_STAT(tx_clean),
50 SXGBE_STAT(tx_reset_ic_bit),
51 SXGBE_STAT(rx_process_stopped_irq),
52 SXGBE_STAT(rx_underflow_irq),
53
54 /* Bus access errors */
55 SXGBE_STAT(fatal_bus_error_irq),
56 SXGBE_STAT(tx_read_transfer_err),
57 SXGBE_STAT(tx_write_transfer_err),
58 SXGBE_STAT(tx_desc_access_err),
59 SXGBE_STAT(tx_buffer_access_err),
60 SXGBE_STAT(tx_data_transfer_err),
61 SXGBE_STAT(rx_read_transfer_err),
62 SXGBE_STAT(rx_write_transfer_err),
63 SXGBE_STAT(rx_desc_access_err),
64 SXGBE_STAT(rx_buffer_access_err),
65 SXGBE_STAT(rx_data_transfer_err),
66
67 /* EEE-LPI stats */
68 SXGBE_STAT(tx_lpi_entry_n),
69 SXGBE_STAT(tx_lpi_exit_n),
70 SXGBE_STAT(rx_lpi_entry_n),
71 SXGBE_STAT(rx_lpi_exit_n),
72 SXGBE_STAT(eee_wakeup_error_n),
73
74 /* RX specific */
75 /* L2 error */
76 SXGBE_STAT(rx_code_gmii_err),
77 SXGBE_STAT(rx_watchdog_err),
78 SXGBE_STAT(rx_crc_err),
79 SXGBE_STAT(rx_gaint_pkt_err),
80 SXGBE_STAT(ip_hdr_err),
81 SXGBE_STAT(ip_payload_err),
82 SXGBE_STAT(overflow_error),
83
84 /* L2 Pkt type */
85 SXGBE_STAT(len_pkt),
86 SXGBE_STAT(mac_ctl_pkt),
87 SXGBE_STAT(dcb_ctl_pkt),
88 SXGBE_STAT(arp_pkt),
89 SXGBE_STAT(oam_pkt),
90 SXGBE_STAT(untag_okt),
91 SXGBE_STAT(other_pkt),
92 SXGBE_STAT(svlan_tag_pkt),
93 SXGBE_STAT(cvlan_tag_pkt),
94 SXGBE_STAT(dvlan_ocvlan_icvlan_pkt),
95 SXGBE_STAT(dvlan_osvlan_isvlan_pkt),
96 SXGBE_STAT(dvlan_osvlan_icvlan_pkt),
97 SXGBE_STAT(dvan_ocvlan_icvlan_pkt),
98
99 /* L3/L4 Pkt type */
100 SXGBE_STAT(not_ip_pkt),
101 SXGBE_STAT(ip4_tcp_pkt),
102 SXGBE_STAT(ip4_udp_pkt),
103 SXGBE_STAT(ip4_icmp_pkt),
104 SXGBE_STAT(ip4_unknown_pkt),
105 SXGBE_STAT(ip6_tcp_pkt),
106 SXGBE_STAT(ip6_udp_pkt),
107 SXGBE_STAT(ip6_icmp_pkt),
108 SXGBE_STAT(ip6_unknown_pkt),
109
110 /* Filter specific */
111 SXGBE_STAT(vlan_filter_match),
112 SXGBE_STAT(sa_filter_fail),
113 SXGBE_STAT(da_filter_fail),
114 SXGBE_STAT(hash_filter_pass),
115 SXGBE_STAT(l3_filter_match),
116 SXGBE_STAT(l4_filter_match),
117
118 /* RX context specific */
119 SXGBE_STAT(timestamp_dropped),
120 SXGBE_STAT(rx_msg_type_no_ptp),
121 SXGBE_STAT(rx_ptp_type_sync),
122 SXGBE_STAT(rx_ptp_type_follow_up),
123 SXGBE_STAT(rx_ptp_type_delay_req),
124 SXGBE_STAT(rx_ptp_type_delay_resp),
125 SXGBE_STAT(rx_ptp_type_pdelay_req),
126 SXGBE_STAT(rx_ptp_type_pdelay_resp),
127 SXGBE_STAT(rx_ptp_type_pdelay_follow_up),
128 SXGBE_STAT(rx_ptp_announce),
129 SXGBE_STAT(rx_ptp_mgmt),
130 SXGBE_STAT(rx_ptp_signal),
131 SXGBE_STAT(rx_ptp_resv_msg_type),
132 };
133 #define SXGBE_STATS_LEN ARRAY_SIZE(sxgbe_gstrings_stats)
134
sxgbe_get_eee(struct net_device * dev,struct ethtool_eee * edata)135 static int sxgbe_get_eee(struct net_device *dev,
136 struct ethtool_eee *edata)
137 {
138 struct sxgbe_priv_data *priv = netdev_priv(dev);
139
140 if (!priv->hw_cap.eee)
141 return -EOPNOTSUPP;
142
143 edata->eee_enabled = priv->eee_enabled;
144 edata->eee_active = priv->eee_active;
145 edata->tx_lpi_timer = priv->tx_lpi_timer;
146
147 return phy_ethtool_get_eee(dev->phydev, edata);
148 }
149
sxgbe_set_eee(struct net_device * dev,struct ethtool_eee * edata)150 static int sxgbe_set_eee(struct net_device *dev,
151 struct ethtool_eee *edata)
152 {
153 struct sxgbe_priv_data *priv = netdev_priv(dev);
154
155 priv->eee_enabled = edata->eee_enabled;
156
157 if (!priv->eee_enabled) {
158 sxgbe_disable_eee_mode(priv);
159 } else {
160 /* We are asking for enabling the EEE but it is safe
161 * to verify all by invoking the eee_init function.
162 * In case of failure it will return an error.
163 */
164 priv->eee_enabled = sxgbe_eee_init(priv);
165 if (!priv->eee_enabled)
166 return -EOPNOTSUPP;
167
168 /* Do not change tx_lpi_timer in case of failure */
169 priv->tx_lpi_timer = edata->tx_lpi_timer;
170 }
171
172 return phy_ethtool_set_eee(dev->phydev, edata);
173 }
174
sxgbe_getdrvinfo(struct net_device * dev,struct ethtool_drvinfo * info)175 static void sxgbe_getdrvinfo(struct net_device *dev,
176 struct ethtool_drvinfo *info)
177 {
178 strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
179 strscpy(info->version, DRV_VERSION, sizeof(info->version));
180 }
181
sxgbe_getmsglevel(struct net_device * dev)182 static u32 sxgbe_getmsglevel(struct net_device *dev)
183 {
184 struct sxgbe_priv_data *priv = netdev_priv(dev);
185 return priv->msg_enable;
186 }
187
sxgbe_setmsglevel(struct net_device * dev,u32 level)188 static void sxgbe_setmsglevel(struct net_device *dev, u32 level)
189 {
190 struct sxgbe_priv_data *priv = netdev_priv(dev);
191 priv->msg_enable = level;
192 }
193
sxgbe_get_strings(struct net_device * dev,u32 stringset,u8 * data)194 static void sxgbe_get_strings(struct net_device *dev, u32 stringset, u8 *data)
195 {
196 int i;
197 u8 *p = data;
198
199 switch (stringset) {
200 case ETH_SS_STATS:
201 for (i = 0; i < SXGBE_STATS_LEN; i++) {
202 memcpy(p, sxgbe_gstrings_stats[i].stat_string,
203 ETH_GSTRING_LEN);
204 p += ETH_GSTRING_LEN;
205 }
206 break;
207 default:
208 WARN_ON(1);
209 break;
210 }
211 }
212
sxgbe_get_sset_count(struct net_device * netdev,int sset)213 static int sxgbe_get_sset_count(struct net_device *netdev, int sset)
214 {
215 int len;
216
217 switch (sset) {
218 case ETH_SS_STATS:
219 len = SXGBE_STATS_LEN;
220 return len;
221 default:
222 return -EINVAL;
223 }
224 }
225
sxgbe_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * dummy,u64 * data)226 static void sxgbe_get_ethtool_stats(struct net_device *dev,
227 struct ethtool_stats *dummy, u64 *data)
228 {
229 struct sxgbe_priv_data *priv = netdev_priv(dev);
230 int i;
231 char *p;
232
233 if (priv->eee_enabled) {
234 int val = phy_get_eee_err(dev->phydev);
235
236 if (val)
237 priv->xstats.eee_wakeup_error_n = val;
238 }
239
240 for (i = 0; i < SXGBE_STATS_LEN; i++) {
241 p = (char *)priv + sxgbe_gstrings_stats[i].stat_offset;
242 data[i] = (sxgbe_gstrings_stats[i].sizeof_stat == sizeof(u64))
243 ? (*(u64 *)p) : (*(u32 *)p);
244 }
245 }
246
sxgbe_get_channels(struct net_device * dev,struct ethtool_channels * channel)247 static void sxgbe_get_channels(struct net_device *dev,
248 struct ethtool_channels *channel)
249 {
250 channel->max_rx = SXGBE_MAX_RX_CHANNELS;
251 channel->max_tx = SXGBE_MAX_TX_CHANNELS;
252 channel->rx_count = SXGBE_RX_QUEUES;
253 channel->tx_count = SXGBE_TX_QUEUES;
254 }
255
sxgbe_riwt2usec(u32 riwt,struct sxgbe_priv_data * priv)256 static u32 sxgbe_riwt2usec(u32 riwt, struct sxgbe_priv_data *priv)
257 {
258 unsigned long clk = clk_get_rate(priv->sxgbe_clk);
259
260 if (!clk)
261 return 0;
262
263 return (riwt * 256) / (clk / 1000000);
264 }
265
sxgbe_usec2riwt(u32 usec,struct sxgbe_priv_data * priv)266 static u32 sxgbe_usec2riwt(u32 usec, struct sxgbe_priv_data *priv)
267 {
268 unsigned long clk = clk_get_rate(priv->sxgbe_clk);
269
270 if (!clk)
271 return 0;
272
273 return (usec * (clk / 1000000)) / 256;
274 }
275
sxgbe_get_coalesce(struct net_device * dev,struct ethtool_coalesce * ec,struct kernel_ethtool_coalesce * kernel_coal,struct netlink_ext_ack * extack)276 static int sxgbe_get_coalesce(struct net_device *dev,
277 struct ethtool_coalesce *ec,
278 struct kernel_ethtool_coalesce *kernel_coal,
279 struct netlink_ext_ack *extack)
280 {
281 struct sxgbe_priv_data *priv = netdev_priv(dev);
282
283 if (priv->use_riwt)
284 ec->rx_coalesce_usecs = sxgbe_riwt2usec(priv->rx_riwt, priv);
285
286 return 0;
287 }
288
sxgbe_set_coalesce(struct net_device * dev,struct ethtool_coalesce * ec,struct kernel_ethtool_coalesce * kernel_coal,struct netlink_ext_ack * extack)289 static int sxgbe_set_coalesce(struct net_device *dev,
290 struct ethtool_coalesce *ec,
291 struct kernel_ethtool_coalesce *kernel_coal,
292 struct netlink_ext_ack *extack)
293 {
294 struct sxgbe_priv_data *priv = netdev_priv(dev);
295 unsigned int rx_riwt;
296
297 if (!ec->rx_coalesce_usecs)
298 return -EINVAL;
299
300 rx_riwt = sxgbe_usec2riwt(ec->rx_coalesce_usecs, priv);
301
302 if ((rx_riwt > SXGBE_MAX_DMA_RIWT) || (rx_riwt < SXGBE_MIN_DMA_RIWT))
303 return -EINVAL;
304 else if (!priv->use_riwt)
305 return -EOPNOTSUPP;
306
307 priv->rx_riwt = rx_riwt;
308 priv->hw->dma->rx_watchdog(priv->ioaddr, priv->rx_riwt);
309
310 return 0;
311 }
312
sxgbe_get_rss_hash_opts(struct sxgbe_priv_data * priv,struct ethtool_rxnfc * cmd)313 static int sxgbe_get_rss_hash_opts(struct sxgbe_priv_data *priv,
314 struct ethtool_rxnfc *cmd)
315 {
316 cmd->data = 0;
317
318 /* Report default options for RSS on sxgbe */
319 switch (cmd->flow_type) {
320 case TCP_V4_FLOW:
321 case UDP_V4_FLOW:
322 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
323 fallthrough;
324 case SCTP_V4_FLOW:
325 case AH_ESP_V4_FLOW:
326 case AH_V4_FLOW:
327 case ESP_V4_FLOW:
328 case IPV4_FLOW:
329 cmd->data |= RXH_IP_SRC | RXH_IP_DST;
330 break;
331 case TCP_V6_FLOW:
332 case UDP_V6_FLOW:
333 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
334 fallthrough;
335 case SCTP_V6_FLOW:
336 case AH_ESP_V6_FLOW:
337 case AH_V6_FLOW:
338 case ESP_V6_FLOW:
339 case IPV6_FLOW:
340 cmd->data |= RXH_IP_SRC | RXH_IP_DST;
341 break;
342 default:
343 return -EINVAL;
344 }
345
346 return 0;
347 }
348
sxgbe_get_rxnfc(struct net_device * dev,struct ethtool_rxnfc * cmd,u32 * rule_locs)349 static int sxgbe_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
350 u32 *rule_locs)
351 {
352 struct sxgbe_priv_data *priv = netdev_priv(dev);
353 int ret = -EOPNOTSUPP;
354
355 switch (cmd->cmd) {
356 case ETHTOOL_GRXFH:
357 ret = sxgbe_get_rss_hash_opts(priv, cmd);
358 break;
359 default:
360 break;
361 }
362
363 return ret;
364 }
365
sxgbe_set_rss_hash_opt(struct sxgbe_priv_data * priv,struct ethtool_rxnfc * cmd)366 static int sxgbe_set_rss_hash_opt(struct sxgbe_priv_data *priv,
367 struct ethtool_rxnfc *cmd)
368 {
369 u32 reg_val = 0;
370
371 /* RSS does not support anything other than hashing
372 * to queues on src and dst IPs and ports
373 */
374 if (cmd->data & ~(RXH_IP_SRC | RXH_IP_DST |
375 RXH_L4_B_0_1 | RXH_L4_B_2_3))
376 return -EINVAL;
377
378 switch (cmd->flow_type) {
379 case TCP_V4_FLOW:
380 case TCP_V6_FLOW:
381 if (!(cmd->data & RXH_IP_SRC) ||
382 !(cmd->data & RXH_IP_DST) ||
383 !(cmd->data & RXH_L4_B_0_1) ||
384 !(cmd->data & RXH_L4_B_2_3))
385 return -EINVAL;
386 reg_val = SXGBE_CORE_RSS_CTL_TCP4TE;
387 break;
388 case UDP_V4_FLOW:
389 case UDP_V6_FLOW:
390 if (!(cmd->data & RXH_IP_SRC) ||
391 !(cmd->data & RXH_IP_DST) ||
392 !(cmd->data & RXH_L4_B_0_1) ||
393 !(cmd->data & RXH_L4_B_2_3))
394 return -EINVAL;
395 reg_val = SXGBE_CORE_RSS_CTL_UDP4TE;
396 break;
397 case SCTP_V4_FLOW:
398 case AH_ESP_V4_FLOW:
399 case AH_V4_FLOW:
400 case ESP_V4_FLOW:
401 case AH_ESP_V6_FLOW:
402 case AH_V6_FLOW:
403 case ESP_V6_FLOW:
404 case SCTP_V6_FLOW:
405 case IPV4_FLOW:
406 case IPV6_FLOW:
407 if (!(cmd->data & RXH_IP_SRC) ||
408 !(cmd->data & RXH_IP_DST) ||
409 (cmd->data & RXH_L4_B_0_1) ||
410 (cmd->data & RXH_L4_B_2_3))
411 return -EINVAL;
412 reg_val = SXGBE_CORE_RSS_CTL_IP2TE;
413 break;
414 default:
415 return -EINVAL;
416 }
417
418 /* Read SXGBE RSS control register and update */
419 reg_val |= readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
420 writel(reg_val, priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
421 readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
422
423 return 0;
424 }
425
sxgbe_set_rxnfc(struct net_device * dev,struct ethtool_rxnfc * cmd)426 static int sxgbe_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
427 {
428 struct sxgbe_priv_data *priv = netdev_priv(dev);
429 int ret = -EOPNOTSUPP;
430
431 switch (cmd->cmd) {
432 case ETHTOOL_SRXFH:
433 ret = sxgbe_set_rss_hash_opt(priv, cmd);
434 break;
435 default:
436 break;
437 }
438
439 return ret;
440 }
441
sxgbe_get_regs(struct net_device * dev,struct ethtool_regs * regs,void * space)442 static void sxgbe_get_regs(struct net_device *dev,
443 struct ethtool_regs *regs, void *space)
444 {
445 struct sxgbe_priv_data *priv = netdev_priv(dev);
446 u32 *reg_space = (u32 *)space;
447 int reg_offset;
448 int reg_ix = 0;
449 void __iomem *ioaddr = priv->ioaddr;
450
451 memset(reg_space, 0x0, REG_SPACE_SIZE);
452
453 /* MAC registers */
454 for (reg_offset = START_MAC_REG_OFFSET;
455 reg_offset <= MAX_MAC_REG_OFFSET; reg_offset += 4) {
456 reg_space[reg_ix] = readl(ioaddr + reg_offset);
457 reg_ix++;
458 }
459
460 /* MTL registers */
461 for (reg_offset = START_MTL_REG_OFFSET;
462 reg_offset <= MAX_MTL_REG_OFFSET; reg_offset += 4) {
463 reg_space[reg_ix] = readl(ioaddr + reg_offset);
464 reg_ix++;
465 }
466
467 /* DMA registers */
468 for (reg_offset = START_DMA_REG_OFFSET;
469 reg_offset <= MAX_DMA_REG_OFFSET; reg_offset += 4) {
470 reg_space[reg_ix] = readl(ioaddr + reg_offset);
471 reg_ix++;
472 }
473
474 BUG_ON(reg_ix * 4 > REG_SPACE_SIZE);
475 }
476
sxgbe_get_regs_len(struct net_device * dev)477 static int sxgbe_get_regs_len(struct net_device *dev)
478 {
479 return REG_SPACE_SIZE;
480 }
481
482 static const struct ethtool_ops sxgbe_ethtool_ops = {
483 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
484 .get_drvinfo = sxgbe_getdrvinfo,
485 .get_msglevel = sxgbe_getmsglevel,
486 .set_msglevel = sxgbe_setmsglevel,
487 .get_link = ethtool_op_get_link,
488 .get_strings = sxgbe_get_strings,
489 .get_ethtool_stats = sxgbe_get_ethtool_stats,
490 .get_sset_count = sxgbe_get_sset_count,
491 .get_channels = sxgbe_get_channels,
492 .get_coalesce = sxgbe_get_coalesce,
493 .set_coalesce = sxgbe_set_coalesce,
494 .get_rxnfc = sxgbe_get_rxnfc,
495 .set_rxnfc = sxgbe_set_rxnfc,
496 .get_regs = sxgbe_get_regs,
497 .get_regs_len = sxgbe_get_regs_len,
498 .get_eee = sxgbe_get_eee,
499 .set_eee = sxgbe_set_eee,
500 .get_link_ksettings = phy_ethtool_get_link_ksettings,
501 .set_link_ksettings = phy_ethtool_set_link_ksettings,
502 };
503
sxgbe_set_ethtool_ops(struct net_device * netdev)504 void sxgbe_set_ethtool_ops(struct net_device *netdev)
505 {
506 netdev->ethtool_ops = &sxgbe_ethtool_ops;
507 }
508