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Siva Reddy1edb9ca2014-03-25 12:10:54 -07001/* 10G controller driver for Samsung SoCs
2 *
3 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
5 *
6 * Author: Siva Reddy Kallam <siva.kallam@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14
Vipul Pandya25f72a72014-03-25 12:11:02 -070015#include <linux/clk.h>
16#include <linux/interrupt.h>
Siva Reddy1edb9ca2014-03-25 12:10:54 -070017#include <linux/kernel.h>
18#include <linux/netdevice.h>
Vipul Pandya25f72a72014-03-25 12:11:02 -070019#include <linux/net_tstamp.h>
Siva Reddy1edb9ca2014-03-25 12:10:54 -070020#include <linux/phy.h>
Vipul Pandya25f72a72014-03-25 12:11:02 -070021#include <linux/ptp_clock_kernel.h>
Siva Reddy1edb9ca2014-03-25 12:10:54 -070022
23#include "sxgbe_common.h"
Vipul Pandya25f72a72014-03-25 12:11:02 -070024#include "sxgbe_reg.h"
25#include "sxgbe_dma.h"
Siva Reddy1edb9ca2014-03-25 12:10:54 -070026
27struct sxgbe_stats {
28 char stat_string[ETH_GSTRING_LEN];
29 int sizeof_stat;
30 int stat_offset;
31};
32
33#define SXGBE_STAT(m) \
34{ \
35 #m, \
36 FIELD_SIZEOF(struct sxgbe_extra_stats, m), \
37 offsetof(struct sxgbe_priv_data, xstats.m) \
38}
39
40static const struct sxgbe_stats sxgbe_gstrings_stats[] = {
Vipul Pandya25f72a72014-03-25 12:11:02 -070041 /* TX/RX IRQ events */
42 SXGBE_STAT(tx_process_stopped_irq),
43 SXGBE_STAT(tx_ctxt_desc_err),
44 SXGBE_STAT(tx_threshold),
45 SXGBE_STAT(rx_threshold),
46 SXGBE_STAT(tx_pkt_n),
47 SXGBE_STAT(rx_pkt_n),
48 SXGBE_STAT(normal_irq_n),
49 SXGBE_STAT(tx_normal_irq_n),
50 SXGBE_STAT(rx_normal_irq_n),
51 SXGBE_STAT(napi_poll),
52 SXGBE_STAT(tx_clean),
53 SXGBE_STAT(tx_reset_ic_bit),
54 SXGBE_STAT(rx_process_stopped_irq),
55 SXGBE_STAT(rx_underflow_irq),
56
57 /* Bus access errors */
58 SXGBE_STAT(fatal_bus_error_irq),
59 SXGBE_STAT(tx_read_transfer_err),
60 SXGBE_STAT(tx_write_transfer_err),
61 SXGBE_STAT(tx_desc_access_err),
62 SXGBE_STAT(tx_buffer_access_err),
63 SXGBE_STAT(tx_data_transfer_err),
64 SXGBE_STAT(rx_read_transfer_err),
65 SXGBE_STAT(rx_write_transfer_err),
66 SXGBE_STAT(rx_desc_access_err),
67 SXGBE_STAT(rx_buffer_access_err),
68 SXGBE_STAT(rx_data_transfer_err),
69
70 /* EEE-LPI stats */
Girish K Sacc18c12014-03-25 12:10:57 -070071 SXGBE_STAT(tx_lpi_entry_n),
72 SXGBE_STAT(tx_lpi_exit_n),
73 SXGBE_STAT(rx_lpi_entry_n),
74 SXGBE_STAT(rx_lpi_exit_n),
75 SXGBE_STAT(eee_wakeup_error_n),
Vipul Pandya25f72a72014-03-25 12:11:02 -070076
77 /* RX specific */
78 /* L2 error */
79 SXGBE_STAT(rx_code_gmii_err),
80 SXGBE_STAT(rx_watchdog_err),
81 SXGBE_STAT(rx_crc_err),
82 SXGBE_STAT(rx_gaint_pkt_err),
83 SXGBE_STAT(ip_hdr_err),
84 SXGBE_STAT(ip_payload_err),
85 SXGBE_STAT(overflow_error),
86
87 /* L2 Pkt type */
88 SXGBE_STAT(len_pkt),
89 SXGBE_STAT(mac_ctl_pkt),
90 SXGBE_STAT(dcb_ctl_pkt),
91 SXGBE_STAT(arp_pkt),
92 SXGBE_STAT(oam_pkt),
93 SXGBE_STAT(untag_okt),
94 SXGBE_STAT(other_pkt),
95 SXGBE_STAT(svlan_tag_pkt),
96 SXGBE_STAT(cvlan_tag_pkt),
97 SXGBE_STAT(dvlan_ocvlan_icvlan_pkt),
98 SXGBE_STAT(dvlan_osvlan_isvlan_pkt),
99 SXGBE_STAT(dvlan_osvlan_icvlan_pkt),
100 SXGBE_STAT(dvan_ocvlan_icvlan_pkt),
101
102 /* L3/L4 Pkt type */
103 SXGBE_STAT(not_ip_pkt),
104 SXGBE_STAT(ip4_tcp_pkt),
105 SXGBE_STAT(ip4_udp_pkt),
106 SXGBE_STAT(ip4_icmp_pkt),
107 SXGBE_STAT(ip4_unknown_pkt),
108 SXGBE_STAT(ip6_tcp_pkt),
109 SXGBE_STAT(ip6_udp_pkt),
110 SXGBE_STAT(ip6_icmp_pkt),
111 SXGBE_STAT(ip6_unknown_pkt),
112
113 /* Filter specific */
114 SXGBE_STAT(vlan_filter_match),
115 SXGBE_STAT(sa_filter_fail),
116 SXGBE_STAT(da_filter_fail),
117 SXGBE_STAT(hash_filter_pass),
118 SXGBE_STAT(l3_filter_match),
119 SXGBE_STAT(l4_filter_match),
120
121 /* RX context specific */
122 SXGBE_STAT(timestamp_dropped),
123 SXGBE_STAT(rx_msg_type_no_ptp),
124 SXGBE_STAT(rx_ptp_type_sync),
125 SXGBE_STAT(rx_ptp_type_follow_up),
126 SXGBE_STAT(rx_ptp_type_delay_req),
127 SXGBE_STAT(rx_ptp_type_delay_resp),
128 SXGBE_STAT(rx_ptp_type_pdelay_req),
129 SXGBE_STAT(rx_ptp_type_pdelay_resp),
130 SXGBE_STAT(rx_ptp_type_pdelay_follow_up),
131 SXGBE_STAT(rx_ptp_announce),
132 SXGBE_STAT(rx_ptp_mgmt),
133 SXGBE_STAT(rx_ptp_signal),
134 SXGBE_STAT(rx_ptp_resv_msg_type),
Siva Reddy1edb9ca2014-03-25 12:10:54 -0700135};
136#define SXGBE_STATS_LEN ARRAY_SIZE(sxgbe_gstrings_stats)
137
Girish K Sacc18c12014-03-25 12:10:57 -0700138static int sxgbe_get_eee(struct net_device *dev,
139 struct ethtool_eee *edata)
140{
141 struct sxgbe_priv_data *priv = netdev_priv(dev);
142
143 if (!priv->hw_cap.eee)
144 return -EOPNOTSUPP;
145
146 edata->eee_enabled = priv->eee_enabled;
147 edata->eee_active = priv->eee_active;
148 edata->tx_lpi_timer = priv->tx_lpi_timer;
149
150 return phy_ethtool_get_eee(priv->phydev, edata);
151}
152
153static int sxgbe_set_eee(struct net_device *dev,
154 struct ethtool_eee *edata)
155{
156 struct sxgbe_priv_data *priv = netdev_priv(dev);
157
158 priv->eee_enabled = edata->eee_enabled;
159
160 if (!priv->eee_enabled) {
161 sxgbe_disable_eee_mode(priv);
162 } else {
163 /* We are asking for enabling the EEE but it is safe
164 * to verify all by invoking the eee_init function.
165 * In case of failure it will return an error.
166 */
167 priv->eee_enabled = sxgbe_eee_init(priv);
168 if (!priv->eee_enabled)
169 return -EOPNOTSUPP;
170
171 /* Do not change tx_lpi_timer in case of failure */
172 priv->tx_lpi_timer = edata->tx_lpi_timer;
173 }
174
175 return phy_ethtool_set_eee(priv->phydev, edata);
176}
177
Vipul Pandya25f72a72014-03-25 12:11:02 -0700178static void sxgbe_getdrvinfo(struct net_device *dev,
179 struct ethtool_drvinfo *info)
180{
181 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
182 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
183}
184
185static int sxgbe_getsettings(struct net_device *dev,
186 struct ethtool_cmd *cmd)
187{
188 struct sxgbe_priv_data *priv = netdev_priv(dev);
189
190 if (priv->phydev)
191 return phy_ethtool_gset(priv->phydev, cmd);
192
193 return -EOPNOTSUPP;
194}
195
196static int sxgbe_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
197{
198 struct sxgbe_priv_data *priv = netdev_priv(dev);
199
200 if (priv->phydev)
201 return phy_ethtool_sset(priv->phydev, cmd);
202
203 return -EOPNOTSUPP;
204}
205
206static u32 sxgbe_getmsglevel(struct net_device *dev)
207{
208 struct sxgbe_priv_data *priv = netdev_priv(dev);
209 return priv->msg_enable;
210}
211
212static void sxgbe_setmsglevel(struct net_device *dev, u32 level)
213{
214 struct sxgbe_priv_data *priv = netdev_priv(dev);
215 priv->msg_enable = level;
216}
217
218static void sxgbe_get_strings(struct net_device *dev, u32 stringset, u8 *data)
219{
220 int i;
221 u8 *p = data;
222
223 switch (stringset) {
224 case ETH_SS_STATS:
225 for (i = 0; i < SXGBE_STATS_LEN; i++) {
226 memcpy(p, sxgbe_gstrings_stats[i].stat_string,
227 ETH_GSTRING_LEN);
228 p += ETH_GSTRING_LEN;
229 }
230 break;
231 default:
232 WARN_ON(1);
233 break;
234 }
235}
236
237static int sxgbe_get_sset_count(struct net_device *netdev, int sset)
238{
239 int len;
240
241 switch (sset) {
242 case ETH_SS_STATS:
243 len = SXGBE_STATS_LEN;
244 return len;
245 default:
246 return -EINVAL;
247 }
248}
249
250static void sxgbe_get_ethtool_stats(struct net_device *dev,
251 struct ethtool_stats *dummy, u64 *data)
252{
253 struct sxgbe_priv_data *priv = netdev_priv(dev);
254 int i;
255 char *p;
256
257 if (priv->eee_enabled) {
258 int val = phy_get_eee_err(priv->phydev);
259
260 if (val)
261 priv->xstats.eee_wakeup_error_n = val;
262 }
263
264 for (i = 0; i < SXGBE_STATS_LEN; i++) {
265 p = (char *)priv + sxgbe_gstrings_stats[i].stat_offset;
266 data[i] = (sxgbe_gstrings_stats[i].sizeof_stat == sizeof(u64))
267 ? (*(u64 *)p) : (*(u32 *)p);
268 }
269}
270
271static void sxgbe_get_channels(struct net_device *dev,
272 struct ethtool_channels *channel)
273{
274 channel->max_rx = SXGBE_MAX_RX_CHANNELS;
275 channel->max_tx = SXGBE_MAX_TX_CHANNELS;
276 channel->rx_count = SXGBE_RX_QUEUES;
277 channel->tx_count = SXGBE_TX_QUEUES;
278}
279
280static u32 sxgbe_riwt2usec(u32 riwt, struct sxgbe_priv_data *priv)
281{
282 unsigned long clk = clk_get_rate(priv->sxgbe_clk);
283
284 if (!clk)
285 return 0;
286
287 return (riwt * 256) / (clk / 1000000);
288}
289
290static u32 sxgbe_usec2riwt(u32 usec, struct sxgbe_priv_data *priv)
291{
292 unsigned long clk = clk_get_rate(priv->sxgbe_clk);
293
294 if (!clk)
295 return 0;
296
297 return (usec * (clk / 1000000)) / 256;
298}
299
300static int sxgbe_get_coalesce(struct net_device *dev,
301 struct ethtool_coalesce *ec)
302{
303 struct sxgbe_priv_data *priv = netdev_priv(dev);
304
305 if (priv->use_riwt)
306 ec->rx_coalesce_usecs = sxgbe_riwt2usec(priv->rx_riwt, priv);
307
308 return 0;
309}
310
311static int sxgbe_set_coalesce(struct net_device *dev,
312 struct ethtool_coalesce *ec)
313{
314 struct sxgbe_priv_data *priv = netdev_priv(dev);
315 unsigned int rx_riwt;
316
317 if (!ec->rx_coalesce_usecs)
318 return -EINVAL;
319
320 rx_riwt = sxgbe_usec2riwt(ec->rx_coalesce_usecs, priv);
321
322 if ((rx_riwt > SXGBE_MAX_DMA_RIWT) || (rx_riwt < SXGBE_MIN_DMA_RIWT))
323 return -EINVAL;
324 else if (!priv->use_riwt)
325 return -EOPNOTSUPP;
326
327 priv->rx_riwt = rx_riwt;
328 priv->hw->dma->rx_watchdog(priv->ioaddr, priv->rx_riwt);
329
330 return 0;
331}
332
333static int sxgbe_get_rss_hash_opts(struct sxgbe_priv_data *priv,
334 struct ethtool_rxnfc *cmd)
335{
336 cmd->data = 0;
337
338 /* Report default options for RSS on sxgbe */
339 switch (cmd->flow_type) {
340 case TCP_V4_FLOW:
341 case UDP_V4_FLOW:
342 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
343 case SCTP_V4_FLOW:
344 case AH_ESP_V4_FLOW:
345 case AH_V4_FLOW:
346 case ESP_V4_FLOW:
347 case IPV4_FLOW:
348 cmd->data |= RXH_IP_SRC | RXH_IP_DST;
349 break;
350 case TCP_V6_FLOW:
351 case UDP_V6_FLOW:
352 cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
353 case SCTP_V6_FLOW:
354 case AH_ESP_V6_FLOW:
355 case AH_V6_FLOW:
356 case ESP_V6_FLOW:
357 case IPV6_FLOW:
358 cmd->data |= RXH_IP_SRC | RXH_IP_DST;
359 break;
360 default:
361 return -EINVAL;
362 }
363
364 return 0;
365}
366
367static int sxgbe_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
368 u32 *rule_locs)
369{
370 struct sxgbe_priv_data *priv = netdev_priv(dev);
371 int ret = -EOPNOTSUPP;
372
373 switch (cmd->cmd) {
374 case ETHTOOL_GRXFH:
375 ret = sxgbe_get_rss_hash_opts(priv, cmd);
376 break;
377 default:
378 break;
379 }
380
381 return ret;
382}
383
384static int sxgbe_set_rss_hash_opt(struct sxgbe_priv_data *priv,
385 struct ethtool_rxnfc *cmd)
386{
387 u32 reg_val = 0;
388
389 /* RSS does not support anything other than hashing
390 * to queues on src and dst IPs and ports
391 */
392 if (cmd->data & ~(RXH_IP_SRC | RXH_IP_DST |
393 RXH_L4_B_0_1 | RXH_L4_B_2_3))
394 return -EINVAL;
395
396 switch (cmd->flow_type) {
397 case TCP_V4_FLOW:
398 case TCP_V6_FLOW:
399 if (!(cmd->data & RXH_IP_SRC) ||
400 !(cmd->data & RXH_IP_DST) ||
401 !(cmd->data & RXH_L4_B_0_1) ||
402 !(cmd->data & RXH_L4_B_2_3))
403 return -EINVAL;
404 reg_val = SXGBE_CORE_RSS_CTL_TCP4TE;
405 break;
406 case UDP_V4_FLOW:
407 case UDP_V6_FLOW:
408 if (!(cmd->data & RXH_IP_SRC) ||
409 !(cmd->data & RXH_IP_DST) ||
410 !(cmd->data & RXH_L4_B_0_1) ||
411 !(cmd->data & RXH_L4_B_2_3))
412 return -EINVAL;
413 reg_val = SXGBE_CORE_RSS_CTL_UDP4TE;
414 break;
415 case SCTP_V4_FLOW:
416 case AH_ESP_V4_FLOW:
417 case AH_V4_FLOW:
418 case ESP_V4_FLOW:
419 case AH_ESP_V6_FLOW:
420 case AH_V6_FLOW:
421 case ESP_V6_FLOW:
422 case SCTP_V6_FLOW:
423 case IPV4_FLOW:
424 case IPV6_FLOW:
425 if (!(cmd->data & RXH_IP_SRC) ||
426 !(cmd->data & RXH_IP_DST) ||
427 (cmd->data & RXH_L4_B_0_1) ||
428 (cmd->data & RXH_L4_B_2_3))
429 return -EINVAL;
430 reg_val = SXGBE_CORE_RSS_CTL_IP2TE;
431 break;
432 default:
433 return -EINVAL;
434 }
435
436 /* Read SXGBE RSS control register and update */
437 reg_val |= readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
438 writel(reg_val, priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
439 readl(priv->ioaddr + SXGBE_CORE_RSS_CTL_REG);
440
441 return 0;
442}
443
444static int sxgbe_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
445{
446 struct sxgbe_priv_data *priv = netdev_priv(dev);
447 int ret = -EOPNOTSUPP;
448
449 switch (cmd->cmd) {
450 case ETHTOOL_SRXFH:
451 ret = sxgbe_set_rss_hash_opt(priv, cmd);
452 break;
453 default:
454 break;
455 }
456
457 return ret;
458}
459
460static void sxgbe_get_regs(struct net_device *dev,
461 struct ethtool_regs *regs, void *space)
462{
463 struct sxgbe_priv_data *priv = netdev_priv(dev);
464 u32 *reg_space = (u32 *)space;
465 int reg_offset;
466 int reg_ix = 0;
467 void __iomem *ioaddr = priv->ioaddr;
468
469 memset(reg_space, 0x0, REG_SPACE_SIZE);
470
471 /* MAC registers */
472 for (reg_offset = START_MAC_REG_OFFSET;
473 reg_offset <= MAX_MAC_REG_OFFSET; reg_offset += 4) {
474 reg_space[reg_ix] = readl(ioaddr + reg_offset);
475 reg_ix++;
476 }
477
478 /* MTL registers */
479 for (reg_offset = START_MTL_REG_OFFSET;
480 reg_offset <= MAX_MTL_REG_OFFSET; reg_offset += 4) {
481 reg_space[reg_ix] = readl(ioaddr + reg_offset);
482 reg_ix++;
483 }
484
485 /* DMA registers */
486 for (reg_offset = START_DMA_REG_OFFSET;
487 reg_offset <= MAX_DMA_REG_OFFSET; reg_offset += 4) {
488 reg_space[reg_ix] = readl(ioaddr + reg_offset);
489 reg_ix++;
490 }
491
492 BUG_ON(reg_ix * 4 > REG_SPACE_SIZE);
493}
494
495static int sxgbe_get_regs_len(struct net_device *dev)
496{
497 return REG_SPACE_SIZE;
498}
499
Siva Reddy1edb9ca2014-03-25 12:10:54 -0700500static const struct ethtool_ops sxgbe_ethtool_ops = {
Vipul Pandya25f72a72014-03-25 12:11:02 -0700501 .get_drvinfo = sxgbe_getdrvinfo,
502 .get_settings = sxgbe_getsettings,
503 .set_settings = sxgbe_setsettings,
504 .get_msglevel = sxgbe_getmsglevel,
505 .set_msglevel = sxgbe_setmsglevel,
506 .get_link = ethtool_op_get_link,
507 .get_strings = sxgbe_get_strings,
508 .get_ethtool_stats = sxgbe_get_ethtool_stats,
509 .get_sset_count = sxgbe_get_sset_count,
510 .get_channels = sxgbe_get_channels,
511 .get_coalesce = sxgbe_get_coalesce,
512 .set_coalesce = sxgbe_set_coalesce,
513 .get_rxnfc = sxgbe_get_rxnfc,
514 .set_rxnfc = sxgbe_set_rxnfc,
515 .get_regs = sxgbe_get_regs,
516 .get_regs_len = sxgbe_get_regs_len,
Girish K Sacc18c12014-03-25 12:10:57 -0700517 .get_eee = sxgbe_get_eee,
518 .set_eee = sxgbe_set_eee,
Siva Reddy1edb9ca2014-03-25 12:10:54 -0700519};
520
521void sxgbe_set_ethtool_ops(struct net_device *netdev)
522{
Wilfried Klaebe7ad24ea2014-05-11 00:12:32 +0000523 netdev->ethtool_ops = &sxgbe_ethtool_ops;
Siva Reddy1edb9ca2014-03-25 12:10:54 -0700524}