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_keee * edata)135 static int sxgbe_get_eee(struct net_device *dev,
136 struct ethtool_keee *edata)
137 {
138 struct sxgbe_priv_data *priv = netdev_priv(dev);
139
140 if (!priv->hw_cap.eee)
141 return -EOPNOTSUPP;
142
143 edata->tx_lpi_timer = priv->tx_lpi_timer;
144
145 return phy_ethtool_get_eee(dev->phydev, edata);
146 }
147
sxgbe_set_eee(struct net_device * dev,struct ethtool_keee * edata)148 static int sxgbe_set_eee(struct net_device *dev,
149 struct ethtool_keee *edata)
150 {
151 struct sxgbe_priv_data *priv = netdev_priv(dev);
152
153 priv->eee_enabled = edata->eee_enabled;
154
155 if (!priv->eee_enabled) {
156 sxgbe_disable_eee_mode(priv);
157 } else {
158 /* We are asking for enabling the EEE but it is safe
159 * to verify all by invoking the eee_init function.
160 * In case of failure it will return an error.
161 */
162 priv->eee_enabled = sxgbe_eee_init(priv);
163 if (!priv->eee_enabled)
164 return -EOPNOTSUPP;
165
166 /* Do not change tx_lpi_timer in case of failure */
167 priv->tx_lpi_timer = edata->tx_lpi_timer;
168 }
169
170 return phy_ethtool_set_eee(dev->phydev, edata);
171 }
172
sxgbe_getdrvinfo(struct net_device * dev,struct ethtool_drvinfo * info)173 static void sxgbe_getdrvinfo(struct net_device *dev,
174 struct ethtool_drvinfo *info)
175 {
176 strscpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
177 strscpy(info->version, DRV_VERSION, sizeof(info->version));
178 }
179
sxgbe_getmsglevel(struct net_device * dev)180 static u32 sxgbe_getmsglevel(struct net_device *dev)
181 {
182 struct sxgbe_priv_data *priv = netdev_priv(dev);
183 return priv->msg_enable;
184 }
185
sxgbe_setmsglevel(struct net_device * dev,u32 level)186 static void sxgbe_setmsglevel(struct net_device *dev, u32 level)
187 {
188 struct sxgbe_priv_data *priv = netdev_priv(dev);
189 priv->msg_enable = level;
190 }
191
sxgbe_get_strings(struct net_device * dev,u32 stringset,u8 * data)192 static void sxgbe_get_strings(struct net_device *dev, u32 stringset, u8 *data)
193 {
194 int i;
195 u8 *p = data;
196
197 switch (stringset) {
198 case ETH_SS_STATS:
199 for (i = 0; i < SXGBE_STATS_LEN; i++) {
200 memcpy(p, sxgbe_gstrings_stats[i].stat_string,
201 ETH_GSTRING_LEN);
202 p += ETH_GSTRING_LEN;
203 }
204 break;
205 default:
206 WARN_ON(1);
207 break;
208 }
209 }
210
sxgbe_get_sset_count(struct net_device * netdev,int sset)211 static int sxgbe_get_sset_count(struct net_device *netdev, int sset)
212 {
213 int len;
214
215 switch (sset) {
216 case ETH_SS_STATS:
217 len = SXGBE_STATS_LEN;
218 return len;
219 default:
220 return -EINVAL;
221 }
222 }
223
sxgbe_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * dummy,u64 * data)224 static void sxgbe_get_ethtool_stats(struct net_device *dev,
225 struct ethtool_stats *dummy, u64 *data)
226 {
227 struct sxgbe_priv_data *priv = netdev_priv(dev);
228 int i;
229 char *p;
230
231 if (priv->eee_enabled) {
232 int val = phy_get_eee_err(dev->phydev);
233
234 if (val)
235 priv->xstats.eee_wakeup_error_n = val;
236 }
237
238 for (i = 0; i < SXGBE_STATS_LEN; i++) {
239 p = (char *)priv + sxgbe_gstrings_stats[i].stat_offset;
240 data[i] = (sxgbe_gstrings_stats[i].sizeof_stat == sizeof(u64))
241 ? (*(u64 *)p) : (*(u32 *)p);
242 }
243 }
244
sxgbe_get_channels(struct net_device * dev,struct ethtool_channels * channel)245 static void sxgbe_get_channels(struct net_device *dev,
246 struct ethtool_channels *channel)
247 {
248 channel->max_rx = SXGBE_MAX_RX_CHANNELS;
249 channel->max_tx = SXGBE_MAX_TX_CHANNELS;
250 channel->rx_count = SXGBE_RX_QUEUES;
251 channel->tx_count = SXGBE_TX_QUEUES;
252 }
253
sxgbe_riwt2usec(u32 riwt,struct sxgbe_priv_data * priv)254 static u32 sxgbe_riwt2usec(u32 riwt, struct sxgbe_priv_data *priv)
255 {
256 unsigned long clk = clk_get_rate(priv->sxgbe_clk);
257
258 if (!clk)
259 return 0;
260
261 return (riwt * 256) / (clk / 1000000);
262 }
263
sxgbe_usec2riwt(u32 usec,struct sxgbe_priv_data * priv)264 static u32 sxgbe_usec2riwt(u32 usec, struct sxgbe_priv_data *priv)
265 {
266 unsigned long clk = clk_get_rate(priv->sxgbe_clk);
267
268 if (!clk)
269 return 0;
270
271 return (usec * (clk / 1000000)) / 256;
272 }
273
sxgbe_get_coalesce(struct net_device * dev,struct ethtool_coalesce * ec,struct kernel_ethtool_coalesce * kernel_coal,struct netlink_ext_ack * extack)274 static int sxgbe_get_coalesce(struct net_device *dev,
275 struct ethtool_coalesce *ec,
276 struct kernel_ethtool_coalesce *kernel_coal,
277 struct netlink_ext_ack *extack)
278 {
279 struct sxgbe_priv_data *priv = netdev_priv(dev);
280
281 if (priv->use_riwt)
282 ec->rx_coalesce_usecs = sxgbe_riwt2usec(priv->rx_riwt, priv);
283
284 return 0;
285 }
286
sxgbe_set_coalesce(struct net_device * dev,struct ethtool_coalesce * ec,struct kernel_ethtool_coalesce * kernel_coal,struct netlink_ext_ack * extack)287 static int sxgbe_set_coalesce(struct net_device *dev,
288 struct ethtool_coalesce *ec,
289 struct kernel_ethtool_coalesce *kernel_coal,
290 struct netlink_ext_ack *extack)
291 {
292 struct sxgbe_priv_data *priv = netdev_priv(dev);
293 unsigned int rx_riwt;
294
295 if (!ec->rx_coalesce_usecs)
296 return -EINVAL;
297
298 rx_riwt = sxgbe_usec2riwt(ec->rx_coalesce_usecs, priv);
299
300 if ((rx_riwt > SXGBE_MAX_DMA_RIWT) || (rx_riwt < SXGBE_MIN_DMA_RIWT))
301 return -EINVAL;
302 else if (!priv->use_riwt)
303 return -EOPNOTSUPP;
304
305 priv->rx_riwt = rx_riwt;
306 priv->hw->dma->rx_watchdog(priv->ioaddr, priv->rx_riwt);
307
308 return 0;
309 }
310
sxgbe_get_rss_hash_opts(struct sxgbe_priv_data * priv,struct ethtool_rxnfc * cmd)311 static int sxgbe_get_rss_hash_opts(struct sxgbe_priv_data *priv,
312 struct ethtool_rxnfc *cmd)
313 {
314 cmd->data = 0;
315
316 /* Report default options for RSS on sxgbe */
317 switch (cmd->flow_type) {
318 case TCP_V4_FLOW:
319 case UDP_V4_FLOW:
320 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
321 fallthrough;
322 case SCTP_V4_FLOW:
323 case AH_ESP_V4_FLOW:
324 case AH_V4_FLOW:
325 case ESP_V4_FLOW:
326 case IPV4_FLOW:
327 cmd->data |= RXH_IP_SRC | RXH_IP_DST;
328 break;
329 case TCP_V6_FLOW:
330 case UDP_V6_FLOW:
331 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
332 fallthrough;
333 case SCTP_V6_FLOW:
334 case AH_ESP_V6_FLOW:
335 case AH_V6_FLOW:
336 case ESP_V6_FLOW:
337 case IPV6_FLOW:
338 cmd->data |= RXH_IP_SRC | RXH_IP_DST;
339 break;
340 default:
341 return -EINVAL;
342 }
343
344 return 0;
345 }
346
sxgbe_get_rxnfc(struct net_device * dev,struct ethtool_rxnfc * cmd,u32 * rule_locs)347 static int sxgbe_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
348 u32 *rule_locs)
349 {
350 struct sxgbe_priv_data *priv = netdev_priv(dev);
351 int ret = -EOPNOTSUPP;
352
353 switch (cmd->cmd) {
354 case ETHTOOL_GRXFH:
355 ret = sxgbe_get_rss_hash_opts(priv, cmd);
356 break;
357 default:
358 break;
359 }
360
361 return ret;
362 }
363
sxgbe_set_rss_hash_opt(struct sxgbe_priv_data * priv,struct ethtool_rxnfc * cmd)364 static int sxgbe_set_rss_hash_opt(struct sxgbe_priv_data *priv,
365 struct ethtool_rxnfc *cmd)
366 {
367 u32 reg_val = 0;
368
369 /* RSS does not support anything other than hashing
370 * to queues on src and dst IPs and ports
371 */
372 if (cmd->data & ~(RXH_IP_SRC | RXH_IP_DST |
373 RXH_L4_B_0_1 | RXH_L4_B_2_3))
374 return -EINVAL;
375
376 switch (cmd->flow_type) {
377 case TCP_V4_FLOW:
378 case TCP_V6_FLOW:
379 if (!(cmd->data & RXH_IP_SRC) ||
380 !(cmd->data & RXH_IP_DST) ||
381 !(cmd->data & RXH_L4_B_0_1) ||
382 !(cmd->data & RXH_L4_B_2_3))
383 return -EINVAL;
384 reg_val = SXGBE_CORE_RSS_CTL_TCP4TE;
385 break;
386 case UDP_V4_FLOW:
387 case UDP_V6_FLOW:
388 if (!(cmd->data & RXH_IP_SRC) ||
389 !(cmd->data & RXH_IP_DST) ||
390 !(cmd->data & RXH_L4_B_0_1) ||
391 !(cmd->data & RXH_L4_B_2_3))
392 return -EINVAL;
393 reg_val = SXGBE_CORE_RSS_CTL_UDP4TE;
394 break;
395 case SCTP_V4_FLOW:
396 case AH_ESP_V4_FLOW:
397 case AH_V4_FLOW:
398 case ESP_V4_FLOW:
399 case AH_ESP_V6_FLOW:
400 case AH_V6_FLOW:
401 case ESP_V6_FLOW:
402 case SCTP_V6_FLOW:
403 case IPV4_FLOW:
404 case IPV6_FLOW:
405 if (!(cmd->data & RXH_IP_SRC) ||
406 !(cmd->data & RXH_IP_DST) ||
407 (cmd->data & RXH_L4_B_0_1) ||
408 (cmd->data & RXH_L4_B_2_3))
409 return -EINVAL;
410 reg_val = SXGBE_CORE_RSS_CTL_IP2TE;
411 break;
412 default:
413 return -EINVAL;
414 }
415
416 /* Read SXGBE RSS control register and update */
417 reg_val |= readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
418 writel(reg_val, priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
419 readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
420
421 return 0;
422 }
423
sxgbe_set_rxnfc(struct net_device * dev,struct ethtool_rxnfc * cmd)424 static int sxgbe_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
425 {
426 struct sxgbe_priv_data *priv = netdev_priv(dev);
427 int ret = -EOPNOTSUPP;
428
429 switch (cmd->cmd) {
430 case ETHTOOL_SRXFH:
431 ret = sxgbe_set_rss_hash_opt(priv, cmd);
432 break;
433 default:
434 break;
435 }
436
437 return ret;
438 }
439
sxgbe_get_regs(struct net_device * dev,struct ethtool_regs * regs,void * space)440 static void sxgbe_get_regs(struct net_device *dev,
441 struct ethtool_regs *regs, void *space)
442 {
443 struct sxgbe_priv_data *priv = netdev_priv(dev);
444 u32 *reg_space = (u32 *)space;
445 int reg_offset;
446 int reg_ix = 0;
447 void __iomem *ioaddr = priv->ioaddr;
448
449 memset(reg_space, 0x0, REG_SPACE_SIZE);
450
451 /* MAC registers */
452 for (reg_offset = START_MAC_REG_OFFSET;
453 reg_offset <= MAX_MAC_REG_OFFSET; reg_offset += 4) {
454 reg_space[reg_ix] = readl(ioaddr + reg_offset);
455 reg_ix++;
456 }
457
458 /* MTL registers */
459 for (reg_offset = START_MTL_REG_OFFSET;
460 reg_offset <= MAX_MTL_REG_OFFSET; reg_offset += 4) {
461 reg_space[reg_ix] = readl(ioaddr + reg_offset);
462 reg_ix++;
463 }
464
465 /* DMA registers */
466 for (reg_offset = START_DMA_REG_OFFSET;
467 reg_offset <= MAX_DMA_REG_OFFSET; reg_offset += 4) {
468 reg_space[reg_ix] = readl(ioaddr + reg_offset);
469 reg_ix++;
470 }
471
472 BUG_ON(reg_ix * 4 > REG_SPACE_SIZE);
473 }
474
sxgbe_get_regs_len(struct net_device * dev)475 static int sxgbe_get_regs_len(struct net_device *dev)
476 {
477 return REG_SPACE_SIZE;
478 }
479
480 static const struct ethtool_ops sxgbe_ethtool_ops = {
481 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
482 .get_drvinfo = sxgbe_getdrvinfo,
483 .get_msglevel = sxgbe_getmsglevel,
484 .set_msglevel = sxgbe_setmsglevel,
485 .get_link = ethtool_op_get_link,
486 .get_strings = sxgbe_get_strings,
487 .get_ethtool_stats = sxgbe_get_ethtool_stats,
488 .get_sset_count = sxgbe_get_sset_count,
489 .get_channels = sxgbe_get_channels,
490 .get_coalesce = sxgbe_get_coalesce,
491 .set_coalesce = sxgbe_set_coalesce,
492 .get_rxnfc = sxgbe_get_rxnfc,
493 .set_rxnfc = sxgbe_set_rxnfc,
494 .get_regs = sxgbe_get_regs,
495 .get_regs_len = sxgbe_get_regs_len,
496 .get_eee = sxgbe_get_eee,
497 .set_eee = sxgbe_set_eee,
498 .get_link_ksettings = phy_ethtool_get_link_ksettings,
499 .set_link_ksettings = phy_ethtool_set_link_ksettings,
500 };
501
sxgbe_set_ethtool_ops(struct net_device * netdev)502 void sxgbe_set_ethtool_ops(struct net_device *netdev)
503 {
504 netdev->ethtool_ops = &sxgbe_ethtool_ops;
505 }
506