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1// SPDX-License-Identifier: GPL-2.0+
2/* Framework for configuring and reading PHY devices
3 * Based on code in sungem_phy.c and gianfar_phy.c
4 *
5 * Author: Andy Fleming
6 *
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 * Copyright (c) 2006, 2007 Maciej W. Rozycki
9 */
10
11#include <linux/kernel.h>
12#include <linux/string.h>
13#include <linux/errno.h>
14#include <linux/unistd.h>
15#include <linux/interrupt.h>
16#include <linux/delay.h>
17#include <linux/netdevice.h>
18#include <linux/netlink.h>
19#include <linux/etherdevice.h>
20#include <linux/skbuff.h>
21#include <linux/mm.h>
22#include <linux/module.h>
23#include <linux/mii.h>
24#include <linux/ethtool.h>
25#include <linux/ethtool_netlink.h>
26#include <linux/phy.h>
27#include <linux/phy_led_triggers.h>
28#include <linux/sfp.h>
29#include <linux/workqueue.h>
30#include <linux/mdio.h>
31#include <linux/io.h>
32#include <linux/uaccess.h>
33#include <linux/atomic.h>
34#include <linux/suspend.h>
35#include <net/netlink.h>
36#include <net/genetlink.h>
37#include <net/sock.h>
38
39#define PHY_STATE_TIME HZ
40
41#define PHY_STATE_STR(_state) \
42 case PHY_##_state: \
43 return __stringify(_state); \
44
45static const char *phy_state_to_str(enum phy_state st)
46{
47 switch (st) {
48 PHY_STATE_STR(DOWN)
49 PHY_STATE_STR(READY)
50 PHY_STATE_STR(UP)
51 PHY_STATE_STR(RUNNING)
52 PHY_STATE_STR(NOLINK)
53 PHY_STATE_STR(CABLETEST)
54 PHY_STATE_STR(HALTED)
55 PHY_STATE_STR(ERROR)
56 }
57
58 return NULL;
59}
60
61static void phy_process_state_change(struct phy_device *phydev,
62 enum phy_state old_state)
63{
64 if (old_state != phydev->state) {
65 phydev_dbg(phydev, "PHY state change %s -> %s\n",
66 phy_state_to_str(old_state),
67 phy_state_to_str(phydev->state));
68 if (phydev->drv && phydev->drv->link_change_notify)
69 phydev->drv->link_change_notify(phydev);
70 }
71}
72
73static void phy_link_up(struct phy_device *phydev)
74{
75 phydev->phy_link_change(phydev, true);
76 phy_led_trigger_change_speed(phydev);
77}
78
79static void phy_link_down(struct phy_device *phydev)
80{
81 phydev->phy_link_change(phydev, false);
82 phy_led_trigger_change_speed(phydev);
83 WRITE_ONCE(phydev->link_down_events, phydev->link_down_events + 1);
84}
85
86static const char *phy_pause_str(struct phy_device *phydev)
87{
88 bool local_pause, local_asym_pause;
89
90 if (phydev->autoneg == AUTONEG_DISABLE)
91 goto no_pause;
92
93 local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
94 phydev->advertising);
95 local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
96 phydev->advertising);
97
98 if (local_pause && phydev->pause)
99 return "rx/tx";
100
101 if (local_asym_pause && phydev->asym_pause) {
102 if (local_pause)
103 return "rx";
104 if (phydev->pause)
105 return "tx";
106 }
107
108no_pause:
109 return "off";
110}
111
112/**
113 * phy_print_status - Convenience function to print out the current phy status
114 * @phydev: the phy_device struct
115 */
116void phy_print_status(struct phy_device *phydev)
117{
118 if (phydev->link) {
119 netdev_info(phydev->attached_dev,
120 "Link is Up - %s/%s %s- flow control %s\n",
121 phy_speed_to_str(phydev->speed),
122 phy_duplex_to_str(phydev->duplex),
123 phydev->downshifted_rate ? "(downshifted) " : "",
124 phy_pause_str(phydev));
125 } else {
126 netdev_info(phydev->attached_dev, "Link is Down\n");
127 }
128}
129EXPORT_SYMBOL(phy_print_status);
130
131/**
132 * phy_get_rate_matching - determine if rate matching is supported
133 * @phydev: The phy device to return rate matching for
134 * @iface: The interface mode to use
135 *
136 * This determines the type of rate matching (if any) that @phy supports
137 * using @iface. @iface may be %PHY_INTERFACE_MODE_NA to determine if any
138 * interface supports rate matching.
139 *
140 * Return: The type of rate matching @phy supports for @iface, or
141 * %RATE_MATCH_NONE.
142 */
143int phy_get_rate_matching(struct phy_device *phydev,
144 phy_interface_t iface)
145{
146 int ret = RATE_MATCH_NONE;
147
148 if (phydev->drv->get_rate_matching) {
149 mutex_lock(&phydev->lock);
150 ret = phydev->drv->get_rate_matching(phydev, iface);
151 mutex_unlock(&phydev->lock);
152 }
153
154 return ret;
155}
156EXPORT_SYMBOL_GPL(phy_get_rate_matching);
157
158/**
159 * phy_config_interrupt - configure the PHY device for the requested interrupts
160 * @phydev: the phy_device struct
161 * @interrupts: interrupt flags to configure for this @phydev
162 *
163 * Returns 0 on success or < 0 on error.
164 */
165static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
166{
167 phydev->interrupts = interrupts ? 1 : 0;
168 if (phydev->drv->config_intr)
169 return phydev->drv->config_intr(phydev);
170
171 return 0;
172}
173
174/**
175 * phy_restart_aneg - restart auto-negotiation
176 * @phydev: target phy_device struct
177 *
178 * Restart the autonegotiation on @phydev. Returns >= 0 on success or
179 * negative errno on error.
180 */
181int phy_restart_aneg(struct phy_device *phydev)
182{
183 int ret;
184
185 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
186 ret = genphy_c45_restart_aneg(phydev);
187 else
188 ret = genphy_restart_aneg(phydev);
189
190 return ret;
191}
192EXPORT_SYMBOL_GPL(phy_restart_aneg);
193
194/**
195 * phy_aneg_done - return auto-negotiation status
196 * @phydev: target phy_device struct
197 *
198 * Description: Return the auto-negotiation status from this @phydev
199 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
200 * is still pending.
201 */
202int phy_aneg_done(struct phy_device *phydev)
203{
204 if (phydev->drv && phydev->drv->aneg_done)
205 return phydev->drv->aneg_done(phydev);
206 else if (phydev->is_c45)
207 return genphy_c45_aneg_done(phydev);
208 else
209 return genphy_aneg_done(phydev);
210}
211EXPORT_SYMBOL(phy_aneg_done);
212
213/**
214 * phy_find_valid - find a PHY setting that matches the requested parameters
215 * @speed: desired speed
216 * @duplex: desired duplex
217 * @supported: mask of supported link modes
218 *
219 * Locate a supported phy setting that is, in priority order:
220 * - an exact match for the specified speed and duplex mode
221 * - a match for the specified speed, or slower speed
222 * - the slowest supported speed
223 * Returns the matched phy_setting entry, or %NULL if no supported phy
224 * settings were found.
225 */
226static const struct phy_setting *
227phy_find_valid(int speed, int duplex, unsigned long *supported)
228{
229 return phy_lookup_setting(speed, duplex, supported, false);
230}
231
232/**
233 * phy_supported_speeds - return all speeds currently supported by a phy device
234 * @phy: The phy device to return supported speeds of.
235 * @speeds: buffer to store supported speeds in.
236 * @size: size of speeds buffer.
237 *
238 * Description: Returns the number of supported speeds, and fills the speeds
239 * buffer with the supported speeds. If speeds buffer is too small to contain
240 * all currently supported speeds, will return as many speeds as can fit.
241 */
242unsigned int phy_supported_speeds(struct phy_device *phy,
243 unsigned int *speeds,
244 unsigned int size)
245{
246 return phy_speeds(speeds, size, phy->supported);
247}
248
249/**
250 * phy_check_valid - check if there is a valid PHY setting which matches
251 * speed, duplex, and feature mask
252 * @speed: speed to match
253 * @duplex: duplex to match
254 * @features: A mask of the valid settings
255 *
256 * Description: Returns true if there is a valid setting, false otherwise.
257 */
258bool phy_check_valid(int speed, int duplex, unsigned long *features)
259{
260 return !!phy_lookup_setting(speed, duplex, features, true);
261}
262EXPORT_SYMBOL(phy_check_valid);
263
264/**
265 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
266 * @phydev: the target phy_device struct
267 *
268 * Description: Make sure the PHY is set to supported speeds and
269 * duplexes. Drop down by one in this order: 1000/FULL,
270 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
271 */
272static void phy_sanitize_settings(struct phy_device *phydev)
273{
274 const struct phy_setting *setting;
275
276 setting = phy_find_valid(phydev->speed, phydev->duplex,
277 phydev->supported);
278 if (setting) {
279 phydev->speed = setting->speed;
280 phydev->duplex = setting->duplex;
281 } else {
282 /* We failed to find anything (no supported speeds?) */
283 phydev->speed = SPEED_UNKNOWN;
284 phydev->duplex = DUPLEX_UNKNOWN;
285 }
286}
287
288void phy_ethtool_ksettings_get(struct phy_device *phydev,
289 struct ethtool_link_ksettings *cmd)
290{
291 mutex_lock(&phydev->lock);
292 linkmode_copy(cmd->link_modes.supported, phydev->supported);
293 linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
294 linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
295
296 cmd->base.speed = phydev->speed;
297 cmd->base.duplex = phydev->duplex;
298 cmd->base.master_slave_cfg = phydev->master_slave_get;
299 cmd->base.master_slave_state = phydev->master_slave_state;
300 cmd->base.rate_matching = phydev->rate_matching;
301 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
302 cmd->base.port = PORT_BNC;
303 else
304 cmd->base.port = phydev->port;
305 cmd->base.transceiver = phy_is_internal(phydev) ?
306 XCVR_INTERNAL : XCVR_EXTERNAL;
307 cmd->base.phy_address = phydev->mdio.addr;
308 cmd->base.autoneg = phydev->autoneg;
309 cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
310 cmd->base.eth_tp_mdix = phydev->mdix;
311 mutex_unlock(&phydev->lock);
312}
313EXPORT_SYMBOL(phy_ethtool_ksettings_get);
314
315/**
316 * phy_mii_ioctl - generic PHY MII ioctl interface
317 * @phydev: the phy_device struct
318 * @ifr: &struct ifreq for socket ioctl's
319 * @cmd: ioctl cmd to execute
320 *
321 * Note that this function is currently incompatible with the
322 * PHYCONTROL layer. It changes registers without regard to
323 * current state. Use at own risk.
324 */
325int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
326{
327 struct mii_ioctl_data *mii_data = if_mii(ifr);
328 struct kernel_hwtstamp_config kernel_cfg;
329 struct netlink_ext_ack extack = {};
330 u16 val = mii_data->val_in;
331 bool change_autoneg = false;
332 struct hwtstamp_config cfg;
333 int prtad, devad;
334 int ret;
335
336 switch (cmd) {
337 case SIOCGMIIPHY:
338 mii_data->phy_id = phydev->mdio.addr;
339 fallthrough;
340
341 case SIOCGMIIREG:
342 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
343 prtad = mdio_phy_id_prtad(mii_data->phy_id);
344 devad = mdio_phy_id_devad(mii_data->phy_id);
345 mii_data->val_out = mdiobus_c45_read(
346 phydev->mdio.bus, prtad, devad,
347 mii_data->reg_num);
348 } else {
349 mii_data->val_out = mdiobus_read(
350 phydev->mdio.bus, mii_data->phy_id,
351 mii_data->reg_num);
352 }
353 return 0;
354
355 case SIOCSMIIREG:
356 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
357 prtad = mdio_phy_id_prtad(mii_data->phy_id);
358 devad = mdio_phy_id_devad(mii_data->phy_id);
359 } else {
360 prtad = mii_data->phy_id;
361 devad = mii_data->reg_num;
362 }
363 if (prtad == phydev->mdio.addr) {
364 switch (devad) {
365 case MII_BMCR:
366 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
367 if (phydev->autoneg == AUTONEG_ENABLE)
368 change_autoneg = true;
369 phydev->autoneg = AUTONEG_DISABLE;
370 if (val & BMCR_FULLDPLX)
371 phydev->duplex = DUPLEX_FULL;
372 else
373 phydev->duplex = DUPLEX_HALF;
374 if (val & BMCR_SPEED1000)
375 phydev->speed = SPEED_1000;
376 else if (val & BMCR_SPEED100)
377 phydev->speed = SPEED_100;
378 else phydev->speed = SPEED_10;
379 } else {
380 if (phydev->autoneg == AUTONEG_DISABLE)
381 change_autoneg = true;
382 phydev->autoneg = AUTONEG_ENABLE;
383 }
384 break;
385 case MII_ADVERTISE:
386 mii_adv_mod_linkmode_adv_t(phydev->advertising,
387 val);
388 change_autoneg = true;
389 break;
390 case MII_CTRL1000:
391 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
392 val);
393 change_autoneg = true;
394 break;
395 default:
396 /* do nothing */
397 break;
398 }
399 }
400
401 if (mdio_phy_id_is_c45(mii_data->phy_id))
402 mdiobus_c45_write(phydev->mdio.bus, prtad, devad,
403 mii_data->reg_num, val);
404 else
405 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
406
407 if (prtad == phydev->mdio.addr &&
408 devad == MII_BMCR &&
409 val & BMCR_RESET)
410 return phy_init_hw(phydev);
411
412 if (change_autoneg)
413 return phy_start_aneg(phydev);
414
415 return 0;
416
417 case SIOCSHWTSTAMP:
418 if (phydev->mii_ts && phydev->mii_ts->hwtstamp) {
419 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
420 return -EFAULT;
421
422 hwtstamp_config_to_kernel(&kernel_cfg, &cfg);
423 ret = phydev->mii_ts->hwtstamp(phydev->mii_ts, &kernel_cfg, &extack);
424 if (ret)
425 return ret;
426
427 hwtstamp_config_from_kernel(&cfg, &kernel_cfg);
428 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)))
429 return -EFAULT;
430
431 return 0;
432 }
433 fallthrough;
434
435 default:
436 return -EOPNOTSUPP;
437 }
438}
439EXPORT_SYMBOL(phy_mii_ioctl);
440
441/**
442 * phy_do_ioctl - generic ndo_eth_ioctl implementation
443 * @dev: the net_device struct
444 * @ifr: &struct ifreq for socket ioctl's
445 * @cmd: ioctl cmd to execute
446 */
447int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
448{
449 if (!dev->phydev)
450 return -ENODEV;
451
452 return phy_mii_ioctl(dev->phydev, ifr, cmd);
453}
454EXPORT_SYMBOL(phy_do_ioctl);
455
456/**
457 * phy_do_ioctl_running - generic ndo_eth_ioctl implementation but test first
458 *
459 * @dev: the net_device struct
460 * @ifr: &struct ifreq for socket ioctl's
461 * @cmd: ioctl cmd to execute
462 *
463 * Same as phy_do_ioctl, but ensures that net_device is running before
464 * handling the ioctl.
465 */
466int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
467{
468 if (!netif_running(dev))
469 return -ENODEV;
470
471 return phy_do_ioctl(dev, ifr, cmd);
472}
473EXPORT_SYMBOL(phy_do_ioctl_running);
474
475/**
476 * __phy_hwtstamp_get - Get hardware timestamping configuration from PHY
477 *
478 * @phydev: the PHY device structure
479 * @config: structure holding the timestamping configuration
480 *
481 * Query the PHY device for its current hardware timestamping configuration.
482 */
483int __phy_hwtstamp_get(struct phy_device *phydev,
484 struct kernel_hwtstamp_config *config)
485{
486 if (!phydev)
487 return -ENODEV;
488
489 return -EOPNOTSUPP;
490}
491
492/**
493 * __phy_hwtstamp_set - Modify PHY hardware timestamping configuration
494 *
495 * @phydev: the PHY device structure
496 * @config: structure holding the timestamping configuration
497 * @extack: netlink extended ack structure, for error reporting
498 */
499int __phy_hwtstamp_set(struct phy_device *phydev,
500 struct kernel_hwtstamp_config *config,
501 struct netlink_ext_ack *extack)
502{
503 if (!phydev)
504 return -ENODEV;
505
506 if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
507 return phydev->mii_ts->hwtstamp(phydev->mii_ts, config, extack);
508
509 return -EOPNOTSUPP;
510}
511
512/**
513 * phy_queue_state_machine - Trigger the state machine to run soon
514 *
515 * @phydev: the phy_device struct
516 * @jiffies: Run the state machine after these jiffies
517 */
518void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
519{
520 mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
521 jiffies);
522}
523EXPORT_SYMBOL(phy_queue_state_machine);
524
525/**
526 * phy_trigger_machine - Trigger the state machine to run now
527 *
528 * @phydev: the phy_device struct
529 */
530void phy_trigger_machine(struct phy_device *phydev)
531{
532 phy_queue_state_machine(phydev, 0);
533}
534EXPORT_SYMBOL(phy_trigger_machine);
535
536static void phy_abort_cable_test(struct phy_device *phydev)
537{
538 int err;
539
540 ethnl_cable_test_finished(phydev);
541
542 err = phy_init_hw(phydev);
543 if (err)
544 phydev_err(phydev, "Error while aborting cable test");
545}
546
547/**
548 * phy_ethtool_get_strings - Get the statistic counter names
549 *
550 * @phydev: the phy_device struct
551 * @data: Where to put the strings
552 */
553int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
554{
555 if (!phydev->drv)
556 return -EIO;
557
558 mutex_lock(&phydev->lock);
559 phydev->drv->get_strings(phydev, data);
560 mutex_unlock(&phydev->lock);
561
562 return 0;
563}
564EXPORT_SYMBOL(phy_ethtool_get_strings);
565
566/**
567 * phy_ethtool_get_sset_count - Get the number of statistic counters
568 *
569 * @phydev: the phy_device struct
570 */
571int phy_ethtool_get_sset_count(struct phy_device *phydev)
572{
573 int ret;
574
575 if (!phydev->drv)
576 return -EIO;
577
578 if (phydev->drv->get_sset_count &&
579 phydev->drv->get_strings &&
580 phydev->drv->get_stats) {
581 mutex_lock(&phydev->lock);
582 ret = phydev->drv->get_sset_count(phydev);
583 mutex_unlock(&phydev->lock);
584
585 return ret;
586 }
587
588 return -EOPNOTSUPP;
589}
590EXPORT_SYMBOL(phy_ethtool_get_sset_count);
591
592/**
593 * phy_ethtool_get_stats - Get the statistic counters
594 *
595 * @phydev: the phy_device struct
596 * @stats: What counters to get
597 * @data: Where to store the counters
598 */
599int phy_ethtool_get_stats(struct phy_device *phydev,
600 struct ethtool_stats *stats, u64 *data)
601{
602 if (!phydev->drv)
603 return -EIO;
604
605 mutex_lock(&phydev->lock);
606 phydev->drv->get_stats(phydev, stats, data);
607 mutex_unlock(&phydev->lock);
608
609 return 0;
610}
611EXPORT_SYMBOL(phy_ethtool_get_stats);
612
613/**
614 * phy_ethtool_get_plca_cfg - Get PLCA RS configuration
615 * @phydev: the phy_device struct
616 * @plca_cfg: where to store the retrieved configuration
617 *
618 * Retrieve the PLCA configuration from the PHY. Return 0 on success or a
619 * negative value if an error occurred.
620 */
621int phy_ethtool_get_plca_cfg(struct phy_device *phydev,
622 struct phy_plca_cfg *plca_cfg)
623{
624 int ret;
625
626 if (!phydev->drv) {
627 ret = -EIO;
628 goto out;
629 }
630
631 if (!phydev->drv->get_plca_cfg) {
632 ret = -EOPNOTSUPP;
633 goto out;
634 }
635
636 mutex_lock(&phydev->lock);
637 ret = phydev->drv->get_plca_cfg(phydev, plca_cfg);
638
639 mutex_unlock(&phydev->lock);
640out:
641 return ret;
642}
643
644/**
645 * plca_check_valid - Check PLCA configuration before enabling
646 * @phydev: the phy_device struct
647 * @plca_cfg: current PLCA configuration
648 * @extack: extack for reporting useful error messages
649 *
650 * Checks whether the PLCA and PHY configuration are consistent and it is safe
651 * to enable PLCA. Returns 0 on success or a negative value if the PLCA or PHY
652 * configuration is not consistent.
653 */
654static int plca_check_valid(struct phy_device *phydev,
655 const struct phy_plca_cfg *plca_cfg,
656 struct netlink_ext_ack *extack)
657{
658 int ret = 0;
659
660 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT,
661 phydev->advertising)) {
662 ret = -EOPNOTSUPP;
663 NL_SET_ERR_MSG(extack,
664 "Point to Multi-Point mode is not enabled");
665 } else if (plca_cfg->node_id >= 255) {
666 NL_SET_ERR_MSG(extack, "PLCA node ID is not set");
667 ret = -EINVAL;
668 }
669
670 return ret;
671}
672
673/**
674 * phy_ethtool_set_plca_cfg - Set PLCA RS configuration
675 * @phydev: the phy_device struct
676 * @plca_cfg: new PLCA configuration to apply
677 * @extack: extack for reporting useful error messages
678 *
679 * Sets the PLCA configuration in the PHY. Return 0 on success or a
680 * negative value if an error occurred.
681 */
682int phy_ethtool_set_plca_cfg(struct phy_device *phydev,
683 const struct phy_plca_cfg *plca_cfg,
684 struct netlink_ext_ack *extack)
685{
686 struct phy_plca_cfg *curr_plca_cfg;
687 int ret;
688
689 if (!phydev->drv) {
690 ret = -EIO;
691 goto out;
692 }
693
694 if (!phydev->drv->set_plca_cfg ||
695 !phydev->drv->get_plca_cfg) {
696 ret = -EOPNOTSUPP;
697 goto out;
698 }
699
700 curr_plca_cfg = kmalloc(sizeof(*curr_plca_cfg), GFP_KERNEL);
701 if (!curr_plca_cfg) {
702 ret = -ENOMEM;
703 goto out;
704 }
705
706 mutex_lock(&phydev->lock);
707
708 ret = phydev->drv->get_plca_cfg(phydev, curr_plca_cfg);
709 if (ret)
710 goto out_drv;
711
712 if (curr_plca_cfg->enabled < 0 && plca_cfg->enabled >= 0) {
713 NL_SET_ERR_MSG(extack,
714 "PHY does not support changing the PLCA 'enable' attribute");
715 ret = -EINVAL;
716 goto out_drv;
717 }
718
719 if (curr_plca_cfg->node_id < 0 && plca_cfg->node_id >= 0) {
720 NL_SET_ERR_MSG(extack,
721 "PHY does not support changing the PLCA 'local node ID' attribute");
722 ret = -EINVAL;
723 goto out_drv;
724 }
725
726 if (curr_plca_cfg->node_cnt < 0 && plca_cfg->node_cnt >= 0) {
727 NL_SET_ERR_MSG(extack,
728 "PHY does not support changing the PLCA 'node count' attribute");
729 ret = -EINVAL;
730 goto out_drv;
731 }
732
733 if (curr_plca_cfg->to_tmr < 0 && plca_cfg->to_tmr >= 0) {
734 NL_SET_ERR_MSG(extack,
735 "PHY does not support changing the PLCA 'TO timer' attribute");
736 ret = -EINVAL;
737 goto out_drv;
738 }
739
740 if (curr_plca_cfg->burst_cnt < 0 && plca_cfg->burst_cnt >= 0) {
741 NL_SET_ERR_MSG(extack,
742 "PHY does not support changing the PLCA 'burst count' attribute");
743 ret = -EINVAL;
744 goto out_drv;
745 }
746
747 if (curr_plca_cfg->burst_tmr < 0 && plca_cfg->burst_tmr >= 0) {
748 NL_SET_ERR_MSG(extack,
749 "PHY does not support changing the PLCA 'burst timer' attribute");
750 ret = -EINVAL;
751 goto out_drv;
752 }
753
754 // if enabling PLCA, perform a few sanity checks
755 if (plca_cfg->enabled > 0) {
756 // allow setting node_id concurrently with enabled
757 if (plca_cfg->node_id >= 0)
758 curr_plca_cfg->node_id = plca_cfg->node_id;
759
760 ret = plca_check_valid(phydev, curr_plca_cfg, extack);
761 if (ret)
762 goto out_drv;
763 }
764
765 ret = phydev->drv->set_plca_cfg(phydev, plca_cfg);
766
767out_drv:
768 kfree(curr_plca_cfg);
769 mutex_unlock(&phydev->lock);
770out:
771 return ret;
772}
773
774/**
775 * phy_ethtool_get_plca_status - Get PLCA RS status information
776 * @phydev: the phy_device struct
777 * @plca_st: where to store the retrieved status information
778 *
779 * Retrieve the PLCA status information from the PHY. Return 0 on success or a
780 * negative value if an error occurred.
781 */
782int phy_ethtool_get_plca_status(struct phy_device *phydev,
783 struct phy_plca_status *plca_st)
784{
785 int ret;
786
787 if (!phydev->drv) {
788 ret = -EIO;
789 goto out;
790 }
791
792 if (!phydev->drv->get_plca_status) {
793 ret = -EOPNOTSUPP;
794 goto out;
795 }
796
797 mutex_lock(&phydev->lock);
798 ret = phydev->drv->get_plca_status(phydev, plca_st);
799
800 mutex_unlock(&phydev->lock);
801out:
802 return ret;
803}
804
805/**
806 * phy_start_cable_test - Start a cable test
807 *
808 * @phydev: the phy_device struct
809 * @extack: extack for reporting useful error messages
810 */
811int phy_start_cable_test(struct phy_device *phydev,
812 struct netlink_ext_ack *extack)
813{
814 struct net_device *dev = phydev->attached_dev;
815 int err = -ENOMEM;
816
817 if (!(phydev->drv &&
818 phydev->drv->cable_test_start &&
819 phydev->drv->cable_test_get_status)) {
820 NL_SET_ERR_MSG(extack,
821 "PHY driver does not support cable testing");
822 return -EOPNOTSUPP;
823 }
824
825 mutex_lock(&phydev->lock);
826 if (phydev->state == PHY_CABLETEST) {
827 NL_SET_ERR_MSG(extack,
828 "PHY already performing a test");
829 err = -EBUSY;
830 goto out;
831 }
832
833 if (phydev->state < PHY_UP ||
834 phydev->state > PHY_CABLETEST) {
835 NL_SET_ERR_MSG(extack,
836 "PHY not configured. Try setting interface up");
837 err = -EBUSY;
838 goto out;
839 }
840
841 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
842 if (err)
843 goto out;
844
845 /* Mark the carrier down until the test is complete */
846 phy_link_down(phydev);
847
848 netif_testing_on(dev);
849 err = phydev->drv->cable_test_start(phydev);
850 if (err) {
851 netif_testing_off(dev);
852 phy_link_up(phydev);
853 goto out_free;
854 }
855
856 phydev->state = PHY_CABLETEST;
857
858 if (phy_polling_mode(phydev))
859 phy_trigger_machine(phydev);
860
861 mutex_unlock(&phydev->lock);
862
863 return 0;
864
865out_free:
866 ethnl_cable_test_free(phydev);
867out:
868 mutex_unlock(&phydev->lock);
869
870 return err;
871}
872EXPORT_SYMBOL(phy_start_cable_test);
873
874/**
875 * phy_start_cable_test_tdr - Start a raw TDR cable test
876 *
877 * @phydev: the phy_device struct
878 * @extack: extack for reporting useful error messages
879 * @config: Configuration of the test to run
880 */
881int phy_start_cable_test_tdr(struct phy_device *phydev,
882 struct netlink_ext_ack *extack,
883 const struct phy_tdr_config *config)
884{
885 struct net_device *dev = phydev->attached_dev;
886 int err = -ENOMEM;
887
888 if (!(phydev->drv &&
889 phydev->drv->cable_test_tdr_start &&
890 phydev->drv->cable_test_get_status)) {
891 NL_SET_ERR_MSG(extack,
892 "PHY driver does not support cable test TDR");
893 return -EOPNOTSUPP;
894 }
895
896 mutex_lock(&phydev->lock);
897 if (phydev->state == PHY_CABLETEST) {
898 NL_SET_ERR_MSG(extack,
899 "PHY already performing a test");
900 err = -EBUSY;
901 goto out;
902 }
903
904 if (phydev->state < PHY_UP ||
905 phydev->state > PHY_CABLETEST) {
906 NL_SET_ERR_MSG(extack,
907 "PHY not configured. Try setting interface up");
908 err = -EBUSY;
909 goto out;
910 }
911
912 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
913 if (err)
914 goto out;
915
916 /* Mark the carrier down until the test is complete */
917 phy_link_down(phydev);
918
919 netif_testing_on(dev);
920 err = phydev->drv->cable_test_tdr_start(phydev, config);
921 if (err) {
922 netif_testing_off(dev);
923 phy_link_up(phydev);
924 goto out_free;
925 }
926
927 phydev->state = PHY_CABLETEST;
928
929 if (phy_polling_mode(phydev))
930 phy_trigger_machine(phydev);
931
932 mutex_unlock(&phydev->lock);
933
934 return 0;
935
936out_free:
937 ethnl_cable_test_free(phydev);
938out:
939 mutex_unlock(&phydev->lock);
940
941 return err;
942}
943EXPORT_SYMBOL(phy_start_cable_test_tdr);
944
945int phy_config_aneg(struct phy_device *phydev)
946{
947 if (phydev->drv->config_aneg)
948 return phydev->drv->config_aneg(phydev);
949
950 /* Clause 45 PHYs that don't implement Clause 22 registers are not
951 * allowed to call genphy_config_aneg()
952 */
953 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
954 return genphy_c45_config_aneg(phydev);
955
956 return genphy_config_aneg(phydev);
957}
958EXPORT_SYMBOL(phy_config_aneg);
959
960/**
961 * phy_check_link_status - check link status and set state accordingly
962 * @phydev: the phy_device struct
963 *
964 * Description: Check for link and whether autoneg was triggered / is running
965 * and set state accordingly
966 */
967static int phy_check_link_status(struct phy_device *phydev)
968{
969 int err;
970
971 lockdep_assert_held(&phydev->lock);
972
973 /* Keep previous state if loopback is enabled because some PHYs
974 * report that Link is Down when loopback is enabled.
975 */
976 if (phydev->loopback_enabled)
977 return 0;
978
979 err = phy_read_status(phydev);
980 if (err)
981 return err;
982
983 if (phydev->link && phydev->state != PHY_RUNNING) {
984 phy_check_downshift(phydev);
985 phydev->state = PHY_RUNNING;
986 err = genphy_c45_eee_is_active(phydev,
987 NULL, NULL, NULL);
988 if (err <= 0)
989 phydev->enable_tx_lpi = false;
990 else
991 phydev->enable_tx_lpi = phydev->eee_cfg.tx_lpi_enabled;
992
993 phy_link_up(phydev);
994 } else if (!phydev->link && phydev->state != PHY_NOLINK) {
995 phydev->state = PHY_NOLINK;
996 phydev->enable_tx_lpi = false;
997 phy_link_down(phydev);
998 }
999
1000 return 0;
1001}
1002
1003/**
1004 * _phy_start_aneg - start auto-negotiation for this PHY device
1005 * @phydev: the phy_device struct
1006 *
1007 * Description: Sanitizes the settings (if we're not autonegotiating
1008 * them), and then calls the driver's config_aneg function.
1009 * If the PHYCONTROL Layer is operating, we change the state to
1010 * reflect the beginning of Auto-negotiation or forcing.
1011 */
1012int _phy_start_aneg(struct phy_device *phydev)
1013{
1014 int err;
1015
1016 lockdep_assert_held(&phydev->lock);
1017
1018 if (!phydev->drv)
1019 return -EIO;
1020
1021 if (AUTONEG_DISABLE == phydev->autoneg)
1022 phy_sanitize_settings(phydev);
1023
1024 err = phy_config_aneg(phydev);
1025 if (err < 0)
1026 return err;
1027
1028 if (phy_is_started(phydev))
1029 err = phy_check_link_status(phydev);
1030
1031 return err;
1032}
1033EXPORT_SYMBOL(_phy_start_aneg);
1034
1035/**
1036 * phy_start_aneg - start auto-negotiation for this PHY device
1037 * @phydev: the phy_device struct
1038 *
1039 * Description: Sanitizes the settings (if we're not autonegotiating
1040 * them), and then calls the driver's config_aneg function.
1041 * If the PHYCONTROL Layer is operating, we change the state to
1042 * reflect the beginning of Auto-negotiation or forcing.
1043 */
1044int phy_start_aneg(struct phy_device *phydev)
1045{
1046 int err;
1047
1048 mutex_lock(&phydev->lock);
1049 err = _phy_start_aneg(phydev);
1050 mutex_unlock(&phydev->lock);
1051
1052 return err;
1053}
1054EXPORT_SYMBOL(phy_start_aneg);
1055
1056static int phy_poll_aneg_done(struct phy_device *phydev)
1057{
1058 unsigned int retries = 100;
1059 int ret;
1060
1061 do {
1062 msleep(100);
1063 ret = phy_aneg_done(phydev);
1064 } while (!ret && --retries);
1065
1066 if (!ret)
1067 return -ETIMEDOUT;
1068
1069 return ret < 0 ? ret : 0;
1070}
1071
1072int phy_ethtool_ksettings_set(struct phy_device *phydev,
1073 const struct ethtool_link_ksettings *cmd)
1074{
1075 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
1076 u8 autoneg = cmd->base.autoneg;
1077 u8 duplex = cmd->base.duplex;
1078 u32 speed = cmd->base.speed;
1079
1080 if (cmd->base.phy_address != phydev->mdio.addr)
1081 return -EINVAL;
1082
1083 linkmode_copy(advertising, cmd->link_modes.advertising);
1084
1085 /* We make sure that we don't pass unsupported values in to the PHY */
1086 linkmode_and(advertising, advertising, phydev->supported);
1087
1088 /* Verify the settings we care about. */
1089 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
1090 return -EINVAL;
1091
1092 if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
1093 return -EINVAL;
1094
1095 if (autoneg == AUTONEG_DISABLE &&
1096 ((speed != SPEED_1000 &&
1097 speed != SPEED_100 &&
1098 speed != SPEED_10) ||
1099 (duplex != DUPLEX_HALF &&
1100 duplex != DUPLEX_FULL)))
1101 return -EINVAL;
1102
1103 mutex_lock(&phydev->lock);
1104 phydev->autoneg = autoneg;
1105
1106 if (autoneg == AUTONEG_DISABLE) {
1107 phydev->speed = speed;
1108 phydev->duplex = duplex;
1109 }
1110
1111 linkmode_copy(phydev->advertising, advertising);
1112
1113 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
1114 phydev->advertising, autoneg == AUTONEG_ENABLE);
1115
1116 phydev->master_slave_set = cmd->base.master_slave_cfg;
1117 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
1118
1119 /* Restart the PHY */
1120 if (phy_is_started(phydev)) {
1121 phydev->state = PHY_UP;
1122 phy_trigger_machine(phydev);
1123 } else {
1124 _phy_start_aneg(phydev);
1125 }
1126
1127 mutex_unlock(&phydev->lock);
1128 return 0;
1129}
1130EXPORT_SYMBOL(phy_ethtool_ksettings_set);
1131
1132/**
1133 * phy_speed_down - set speed to lowest speed supported by both link partners
1134 * @phydev: the phy_device struct
1135 * @sync: perform action synchronously
1136 *
1137 * Description: Typically used to save energy when waiting for a WoL packet
1138 *
1139 * WARNING: Setting sync to false may cause the system being unable to suspend
1140 * in case the PHY generates an interrupt when finishing the autonegotiation.
1141 * This interrupt may wake up the system immediately after suspend.
1142 * Therefore use sync = false only if you're sure it's safe with the respective
1143 * network chip.
1144 */
1145int phy_speed_down(struct phy_device *phydev, bool sync)
1146{
1147 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
1148 int ret = 0;
1149
1150 mutex_lock(&phydev->lock);
1151
1152 if (phydev->autoneg != AUTONEG_ENABLE)
1153 goto out;
1154
1155 linkmode_copy(adv_tmp, phydev->advertising);
1156
1157 ret = phy_speed_down_core(phydev);
1158 if (ret)
1159 goto out;
1160
1161 linkmode_copy(phydev->adv_old, adv_tmp);
1162
1163 if (linkmode_equal(phydev->advertising, adv_tmp)) {
1164 ret = 0;
1165 goto out;
1166 }
1167
1168 ret = phy_config_aneg(phydev);
1169 if (ret)
1170 goto out;
1171
1172 ret = sync ? phy_poll_aneg_done(phydev) : 0;
1173out:
1174 mutex_unlock(&phydev->lock);
1175
1176 return ret;
1177}
1178EXPORT_SYMBOL_GPL(phy_speed_down);
1179
1180/**
1181 * phy_speed_up - (re)set advertised speeds to all supported speeds
1182 * @phydev: the phy_device struct
1183 *
1184 * Description: Used to revert the effect of phy_speed_down
1185 */
1186int phy_speed_up(struct phy_device *phydev)
1187{
1188 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
1189 int ret = 0;
1190
1191 mutex_lock(&phydev->lock);
1192
1193 if (phydev->autoneg != AUTONEG_ENABLE)
1194 goto out;
1195
1196 if (linkmode_empty(phydev->adv_old))
1197 goto out;
1198
1199 linkmode_copy(adv_tmp, phydev->advertising);
1200 linkmode_copy(phydev->advertising, phydev->adv_old);
1201 linkmode_zero(phydev->adv_old);
1202
1203 if (linkmode_equal(phydev->advertising, adv_tmp))
1204 goto out;
1205
1206 ret = phy_config_aneg(phydev);
1207out:
1208 mutex_unlock(&phydev->lock);
1209
1210 return ret;
1211}
1212EXPORT_SYMBOL_GPL(phy_speed_up);
1213
1214/**
1215 * phy_start_machine - start PHY state machine tracking
1216 * @phydev: the phy_device struct
1217 *
1218 * Description: The PHY infrastructure can run a state machine
1219 * which tracks whether the PHY is starting up, negotiating,
1220 * etc. This function starts the delayed workqueue which tracks
1221 * the state of the PHY. If you want to maintain your own state machine,
1222 * do not call this function.
1223 */
1224void phy_start_machine(struct phy_device *phydev)
1225{
1226 phy_trigger_machine(phydev);
1227}
1228EXPORT_SYMBOL_GPL(phy_start_machine);
1229
1230/**
1231 * phy_stop_machine - stop the PHY state machine tracking
1232 * @phydev: target phy_device struct
1233 *
1234 * Description: Stops the state machine delayed workqueue, sets the
1235 * state to UP (unless it wasn't up yet). This function must be
1236 * called BEFORE phy_detach.
1237 */
1238void phy_stop_machine(struct phy_device *phydev)
1239{
1240 cancel_delayed_work_sync(&phydev->state_queue);
1241
1242 mutex_lock(&phydev->lock);
1243 if (phy_is_started(phydev))
1244 phydev->state = PHY_UP;
1245 mutex_unlock(&phydev->lock);
1246}
1247
1248static void phy_process_error(struct phy_device *phydev)
1249{
1250 /* phydev->lock must be held for the state change to be safe */
1251 if (!mutex_is_locked(&phydev->lock))
1252 phydev_err(phydev, "PHY-device data unsafe context\n");
1253
1254 phydev->state = PHY_ERROR;
1255
1256 phy_trigger_machine(phydev);
1257}
1258
1259static void phy_error_precise(struct phy_device *phydev,
1260 const void *func, int err)
1261{
1262 WARN(1, "%pS: returned: %d\n", func, err);
1263 phy_process_error(phydev);
1264}
1265
1266/**
1267 * phy_error - enter ERROR state for this PHY device
1268 * @phydev: target phy_device struct
1269 *
1270 * Moves the PHY to the ERROR state in response to a read
1271 * or write error, and tells the controller the link is down.
1272 * Must be called with phydev->lock held.
1273 */
1274void phy_error(struct phy_device *phydev)
1275{
1276 WARN_ON(1);
1277 phy_process_error(phydev);
1278}
1279EXPORT_SYMBOL(phy_error);
1280
1281/**
1282 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
1283 * @phydev: target phy_device struct
1284 */
1285int phy_disable_interrupts(struct phy_device *phydev)
1286{
1287 /* Disable PHY interrupts */
1288 return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
1289}
1290
1291/**
1292 * phy_interrupt - PHY interrupt handler
1293 * @irq: interrupt line
1294 * @phy_dat: phy_device pointer
1295 *
1296 * Description: Handle PHY interrupt
1297 */
1298static irqreturn_t phy_interrupt(int irq, void *phy_dat)
1299{
1300 struct phy_device *phydev = phy_dat;
1301 irqreturn_t ret;
1302
1303 /* Wakeup interrupts may occur during a system sleep transition.
1304 * Postpone handling until the PHY has resumed.
1305 */
1306 if (IS_ENABLED(CONFIG_PM_SLEEP) && phydev->irq_suspended) {
1307 struct net_device *netdev = phydev->attached_dev;
1308
1309 if (netdev) {
1310 struct device *parent = netdev->dev.parent;
1311
1312 if (netdev->wol_enabled)
1313 pm_system_wakeup();
1314 else if (device_may_wakeup(&netdev->dev))
1315 pm_wakeup_dev_event(&netdev->dev, 0, true);
1316 else if (parent && device_may_wakeup(parent))
1317 pm_wakeup_dev_event(parent, 0, true);
1318 }
1319
1320 phydev->irq_rerun = 1;
1321 disable_irq_nosync(irq);
1322 return IRQ_HANDLED;
1323 }
1324
1325 mutex_lock(&phydev->lock);
1326 ret = phydev->drv->handle_interrupt(phydev);
1327 mutex_unlock(&phydev->lock);
1328
1329 return ret;
1330}
1331
1332/**
1333 * phy_enable_interrupts - Enable the interrupts from the PHY side
1334 * @phydev: target phy_device struct
1335 */
1336static int phy_enable_interrupts(struct phy_device *phydev)
1337{
1338 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
1339}
1340
1341/**
1342 * phy_request_interrupt - request and enable interrupt for a PHY device
1343 * @phydev: target phy_device struct
1344 *
1345 * Description: Request and enable the interrupt for the given PHY.
1346 * If this fails, then we set irq to PHY_POLL.
1347 * This should only be called with a valid IRQ number.
1348 */
1349void phy_request_interrupt(struct phy_device *phydev)
1350{
1351 int err;
1352
1353 err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
1354 IRQF_ONESHOT | IRQF_SHARED,
1355 phydev_name(phydev), phydev);
1356 if (err) {
1357 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
1358 err, phydev->irq);
1359 phydev->irq = PHY_POLL;
1360 } else {
1361 if (phy_enable_interrupts(phydev)) {
1362 phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
1363 phy_free_interrupt(phydev);
1364 phydev->irq = PHY_POLL;
1365 }
1366 }
1367}
1368EXPORT_SYMBOL(phy_request_interrupt);
1369
1370/**
1371 * phy_free_interrupt - disable and free interrupt for a PHY device
1372 * @phydev: target phy_device struct
1373 *
1374 * Description: Disable and free the interrupt for the given PHY.
1375 * This should only be called with a valid IRQ number.
1376 */
1377void phy_free_interrupt(struct phy_device *phydev)
1378{
1379 phy_disable_interrupts(phydev);
1380 free_irq(phydev->irq, phydev);
1381}
1382EXPORT_SYMBOL(phy_free_interrupt);
1383
1384enum phy_state_work {
1385 PHY_STATE_WORK_NONE,
1386 PHY_STATE_WORK_ANEG,
1387 PHY_STATE_WORK_SUSPEND,
1388};
1389
1390static enum phy_state_work _phy_state_machine(struct phy_device *phydev)
1391{
1392 enum phy_state_work state_work = PHY_STATE_WORK_NONE;
1393 struct net_device *dev = phydev->attached_dev;
1394 enum phy_state old_state = phydev->state;
1395 const void *func = NULL;
1396 bool finished = false;
1397 int err = 0;
1398
1399 switch (phydev->state) {
1400 case PHY_DOWN:
1401 case PHY_READY:
1402 break;
1403 case PHY_UP:
1404 state_work = PHY_STATE_WORK_ANEG;
1405 break;
1406 case PHY_NOLINK:
1407 case PHY_RUNNING:
1408 err = phy_check_link_status(phydev);
1409 func = &phy_check_link_status;
1410 break;
1411 case PHY_CABLETEST:
1412 err = phydev->drv->cable_test_get_status(phydev, &finished);
1413 if (err) {
1414 phy_abort_cable_test(phydev);
1415 netif_testing_off(dev);
1416 state_work = PHY_STATE_WORK_ANEG;
1417 phydev->state = PHY_UP;
1418 break;
1419 }
1420
1421 if (finished) {
1422 ethnl_cable_test_finished(phydev);
1423 netif_testing_off(dev);
1424 state_work = PHY_STATE_WORK_ANEG;
1425 phydev->state = PHY_UP;
1426 }
1427 break;
1428 case PHY_HALTED:
1429 case PHY_ERROR:
1430 if (phydev->link) {
1431 phydev->link = 0;
1432 phy_link_down(phydev);
1433 }
1434 state_work = PHY_STATE_WORK_SUSPEND;
1435 break;
1436 }
1437
1438 if (state_work == PHY_STATE_WORK_ANEG) {
1439 err = _phy_start_aneg(phydev);
1440 func = &_phy_start_aneg;
1441 }
1442
1443 if (err == -ENODEV)
1444 return state_work;
1445
1446 if (err < 0)
1447 phy_error_precise(phydev, func, err);
1448
1449 phy_process_state_change(phydev, old_state);
1450
1451 /* Only re-schedule a PHY state machine change if we are polling the
1452 * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving
1453 * between states from phy_mac_interrupt().
1454 *
1455 * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1456 * state machine would be pointless and possibly error prone when
1457 * called from phy_disconnect() synchronously.
1458 */
1459 if (phy_polling_mode(phydev) && phy_is_started(phydev))
1460 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1461
1462 return state_work;
1463}
1464
1465/* unlocked part of the PHY state machine */
1466static void _phy_state_machine_post_work(struct phy_device *phydev,
1467 enum phy_state_work state_work)
1468{
1469 if (state_work == PHY_STATE_WORK_SUSPEND)
1470 phy_suspend(phydev);
1471}
1472
1473/**
1474 * phy_state_machine - Handle the state machine
1475 * @work: work_struct that describes the work to be done
1476 */
1477void phy_state_machine(struct work_struct *work)
1478{
1479 struct delayed_work *dwork = to_delayed_work(work);
1480 struct phy_device *phydev =
1481 container_of(dwork, struct phy_device, state_queue);
1482 enum phy_state_work state_work;
1483
1484 mutex_lock(&phydev->lock);
1485 state_work = _phy_state_machine(phydev);
1486 mutex_unlock(&phydev->lock);
1487
1488 _phy_state_machine_post_work(phydev, state_work);
1489}
1490
1491/**
1492 * phy_stop - Bring down the PHY link, and stop checking the status
1493 * @phydev: target phy_device struct
1494 */
1495void phy_stop(struct phy_device *phydev)
1496{
1497 struct net_device *dev = phydev->attached_dev;
1498 enum phy_state_work state_work;
1499 enum phy_state old_state;
1500
1501 if (!phy_is_started(phydev) && phydev->state != PHY_DOWN &&
1502 phydev->state != PHY_ERROR) {
1503 WARN(1, "called from state %s\n",
1504 phy_state_to_str(phydev->state));
1505 return;
1506 }
1507
1508 mutex_lock(&phydev->lock);
1509 old_state = phydev->state;
1510
1511 if (phydev->state == PHY_CABLETEST) {
1512 phy_abort_cable_test(phydev);
1513 netif_testing_off(dev);
1514 }
1515
1516 if (phydev->sfp_bus)
1517 sfp_upstream_stop(phydev->sfp_bus);
1518
1519 phydev->state = PHY_HALTED;
1520 phy_process_state_change(phydev, old_state);
1521
1522 state_work = _phy_state_machine(phydev);
1523 mutex_unlock(&phydev->lock);
1524
1525 _phy_state_machine_post_work(phydev, state_work);
1526 phy_stop_machine(phydev);
1527
1528 /* Cannot call flush_scheduled_work() here as desired because
1529 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
1530 * will not reenable interrupts.
1531 */
1532}
1533EXPORT_SYMBOL(phy_stop);
1534
1535/**
1536 * phy_start - start or restart a PHY device
1537 * @phydev: target phy_device struct
1538 *
1539 * Description: Indicates the attached device's readiness to
1540 * handle PHY-related work. Used during startup to start the
1541 * PHY, and after a call to phy_stop() to resume operation.
1542 * Also used to indicate the MDIO bus has cleared an error
1543 * condition.
1544 */
1545void phy_start(struct phy_device *phydev)
1546{
1547 mutex_lock(&phydev->lock);
1548
1549 if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
1550 WARN(1, "called from state %s\n",
1551 phy_state_to_str(phydev->state));
1552 goto out;
1553 }
1554
1555 if (phydev->sfp_bus)
1556 sfp_upstream_start(phydev->sfp_bus);
1557
1558 /* if phy was suspended, bring the physical link up again */
1559 __phy_resume(phydev);
1560
1561 phydev->state = PHY_UP;
1562
1563 phy_start_machine(phydev);
1564out:
1565 mutex_unlock(&phydev->lock);
1566}
1567EXPORT_SYMBOL(phy_start);
1568
1569/**
1570 * phy_mac_interrupt - MAC says the link has changed
1571 * @phydev: phy_device struct with changed link
1572 *
1573 * The MAC layer is able to indicate there has been a change in the PHY link
1574 * status. Trigger the state machine and work a work queue.
1575 */
1576void phy_mac_interrupt(struct phy_device *phydev)
1577{
1578 /* Trigger a state machine change */
1579 phy_trigger_machine(phydev);
1580}
1581EXPORT_SYMBOL(phy_mac_interrupt);
1582
1583/**
1584 * phy_init_eee - init and check the EEE feature
1585 * @phydev: target phy_device struct
1586 * @clk_stop_enable: PHY may stop the clock during LPI
1587 *
1588 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1589 * is supported by looking at the MMD registers 3.20 and 7.60/61
1590 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1591 * bit if required.
1592 */
1593int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1594{
1595 int ret;
1596
1597 if (!phydev->drv)
1598 return -EIO;
1599
1600 ret = genphy_c45_eee_is_active(phydev, NULL, NULL, NULL);
1601 if (ret < 0)
1602 return ret;
1603 if (!ret)
1604 return -EPROTONOSUPPORT;
1605
1606 if (clk_stop_enable)
1607 /* Configure the PHY to stop receiving xMII
1608 * clock while it is signaling LPI.
1609 */
1610 ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1611 MDIO_PCS_CTRL1_CLKSTOP_EN);
1612
1613 return ret < 0 ? ret : 0;
1614}
1615EXPORT_SYMBOL(phy_init_eee);
1616
1617/**
1618 * phy_get_eee_err - report the EEE wake error count
1619 * @phydev: target phy_device struct
1620 *
1621 * Description: it is to report the number of time where the PHY
1622 * failed to complete its normal wake sequence.
1623 */
1624int phy_get_eee_err(struct phy_device *phydev)
1625{
1626 int ret;
1627
1628 if (!phydev->drv)
1629 return -EIO;
1630
1631 mutex_lock(&phydev->lock);
1632 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1633 mutex_unlock(&phydev->lock);
1634
1635 return ret;
1636}
1637EXPORT_SYMBOL(phy_get_eee_err);
1638
1639/**
1640 * phy_ethtool_get_eee - get EEE supported and status
1641 * @phydev: target phy_device struct
1642 * @data: ethtool_keee data
1643 *
1644 * Description: reports the Supported/Advertisement/LP Advertisement
1645 * capabilities, etc.
1646 */
1647int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_keee *data)
1648{
1649 int ret;
1650
1651 if (!phydev->drv)
1652 return -EIO;
1653
1654 mutex_lock(&phydev->lock);
1655 ret = genphy_c45_ethtool_get_eee(phydev, data);
1656 eeecfg_to_eee(data, &phydev->eee_cfg);
1657 mutex_unlock(&phydev->lock);
1658
1659 return ret;
1660}
1661EXPORT_SYMBOL(phy_ethtool_get_eee);
1662
1663/**
1664 * phy_ethtool_set_eee_noneg - Adjusts MAC LPI configuration without PHY
1665 * renegotiation
1666 * @phydev: pointer to the target PHY device structure
1667 * @data: pointer to the ethtool_keee structure containing the new EEE settings
1668 *
1669 * This function updates the Energy Efficient Ethernet (EEE) configuration
1670 * for cases where only the MAC's Low Power Idle (LPI) configuration changes,
1671 * without triggering PHY renegotiation. It ensures that the MAC is properly
1672 * informed of the new LPI settings by cycling the link down and up, which
1673 * is necessary for the MAC to adopt the new configuration. This adjustment
1674 * is done only if there is a change in the tx_lpi_enabled or tx_lpi_timer
1675 * configuration.
1676 */
1677static void phy_ethtool_set_eee_noneg(struct phy_device *phydev,
1678 struct ethtool_keee *data)
1679{
1680 if (phydev->eee_cfg.tx_lpi_enabled != data->tx_lpi_enabled ||
1681 phydev->eee_cfg.tx_lpi_timer != data->tx_lpi_timer) {
1682 eee_to_eeecfg(&phydev->eee_cfg, data);
1683 phydev->enable_tx_lpi = eeecfg_mac_can_tx_lpi(&phydev->eee_cfg);
1684 if (phydev->link) {
1685 phydev->link = false;
1686 phy_link_down(phydev);
1687 phydev->link = true;
1688 phy_link_up(phydev);
1689 }
1690 }
1691}
1692
1693/**
1694 * phy_ethtool_set_eee - set EEE supported and status
1695 * @phydev: target phy_device struct
1696 * @data: ethtool_keee data
1697 *
1698 * Description: it is to program the Advertisement EEE register.
1699 */
1700int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_keee *data)
1701{
1702 int ret;
1703
1704 if (!phydev->drv)
1705 return -EIO;
1706
1707 mutex_lock(&phydev->lock);
1708 ret = genphy_c45_ethtool_set_eee(phydev, data);
1709 if (ret >= 0) {
1710 if (ret == 0)
1711 phy_ethtool_set_eee_noneg(phydev, data);
1712 eee_to_eeecfg(&phydev->eee_cfg, data);
1713 }
1714 mutex_unlock(&phydev->lock);
1715
1716 return ret < 0 ? ret : 0;
1717}
1718EXPORT_SYMBOL(phy_ethtool_set_eee);
1719
1720/**
1721 * phy_ethtool_set_wol - Configure Wake On LAN
1722 *
1723 * @phydev: target phy_device struct
1724 * @wol: Configuration requested
1725 */
1726int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1727{
1728 int ret;
1729
1730 if (phydev->drv && phydev->drv->set_wol) {
1731 mutex_lock(&phydev->lock);
1732 ret = phydev->drv->set_wol(phydev, wol);
1733 mutex_unlock(&phydev->lock);
1734
1735 return ret;
1736 }
1737
1738 return -EOPNOTSUPP;
1739}
1740EXPORT_SYMBOL(phy_ethtool_set_wol);
1741
1742/**
1743 * phy_ethtool_get_wol - Get the current Wake On LAN configuration
1744 *
1745 * @phydev: target phy_device struct
1746 * @wol: Store the current configuration here
1747 */
1748void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1749{
1750 if (phydev->drv && phydev->drv->get_wol) {
1751 mutex_lock(&phydev->lock);
1752 phydev->drv->get_wol(phydev, wol);
1753 mutex_unlock(&phydev->lock);
1754 }
1755}
1756EXPORT_SYMBOL(phy_ethtool_get_wol);
1757
1758int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1759 struct ethtool_link_ksettings *cmd)
1760{
1761 struct phy_device *phydev = ndev->phydev;
1762
1763 if (!phydev)
1764 return -ENODEV;
1765
1766 phy_ethtool_ksettings_get(phydev, cmd);
1767
1768 return 0;
1769}
1770EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1771
1772int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1773 const struct ethtool_link_ksettings *cmd)
1774{
1775 struct phy_device *phydev = ndev->phydev;
1776
1777 if (!phydev)
1778 return -ENODEV;
1779
1780 return phy_ethtool_ksettings_set(phydev, cmd);
1781}
1782EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1783
1784/**
1785 * phy_ethtool_nway_reset - Restart auto negotiation
1786 * @ndev: Network device to restart autoneg for
1787 */
1788int phy_ethtool_nway_reset(struct net_device *ndev)
1789{
1790 struct phy_device *phydev = ndev->phydev;
1791 int ret;
1792
1793 if (!phydev)
1794 return -ENODEV;
1795
1796 if (!phydev->drv)
1797 return -EIO;
1798
1799 mutex_lock(&phydev->lock);
1800 ret = phy_restart_aneg(phydev);
1801 mutex_unlock(&phydev->lock);
1802
1803 return ret;
1804}
1805EXPORT_SYMBOL(phy_ethtool_nway_reset);
1// SPDX-License-Identifier: GPL-2.0+
2/* Framework for configuring and reading PHY devices
3 * Based on code in sungem_phy.c and gianfar_phy.c
4 *
5 * Author: Andy Fleming
6 *
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 * Copyright (c) 2006, 2007 Maciej W. Rozycki
9 */
10
11#include <linux/kernel.h>
12#include <linux/string.h>
13#include <linux/errno.h>
14#include <linux/unistd.h>
15#include <linux/interrupt.h>
16#include <linux/delay.h>
17#include <linux/netdevice.h>
18#include <linux/etherdevice.h>
19#include <linux/skbuff.h>
20#include <linux/mm.h>
21#include <linux/module.h>
22#include <linux/mii.h>
23#include <linux/ethtool.h>
24#include <linux/phy.h>
25#include <linux/phy_led_triggers.h>
26#include <linux/workqueue.h>
27#include <linux/mdio.h>
28#include <linux/io.h>
29#include <linux/uaccess.h>
30#include <linux/atomic.h>
31
32#define PHY_STATE_TIME HZ
33
34#define PHY_STATE_STR(_state) \
35 case PHY_##_state: \
36 return __stringify(_state); \
37
38static const char *phy_state_to_str(enum phy_state st)
39{
40 switch (st) {
41 PHY_STATE_STR(DOWN)
42 PHY_STATE_STR(READY)
43 PHY_STATE_STR(UP)
44 PHY_STATE_STR(RUNNING)
45 PHY_STATE_STR(NOLINK)
46 PHY_STATE_STR(HALTED)
47 }
48
49 return NULL;
50}
51
52static void phy_link_up(struct phy_device *phydev)
53{
54 phydev->phy_link_change(phydev, true, true);
55 phy_led_trigger_change_speed(phydev);
56}
57
58static void phy_link_down(struct phy_device *phydev, bool do_carrier)
59{
60 phydev->phy_link_change(phydev, false, do_carrier);
61 phy_led_trigger_change_speed(phydev);
62}
63
64static const char *phy_pause_str(struct phy_device *phydev)
65{
66 bool local_pause, local_asym_pause;
67
68 if (phydev->autoneg == AUTONEG_DISABLE)
69 goto no_pause;
70
71 local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
72 phydev->advertising);
73 local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
74 phydev->advertising);
75
76 if (local_pause && phydev->pause)
77 return "rx/tx";
78
79 if (local_asym_pause && phydev->asym_pause) {
80 if (local_pause)
81 return "rx";
82 if (phydev->pause)
83 return "tx";
84 }
85
86no_pause:
87 return "off";
88}
89
90/**
91 * phy_print_status - Convenience function to print out the current phy status
92 * @phydev: the phy_device struct
93 */
94void phy_print_status(struct phy_device *phydev)
95{
96 if (phydev->link) {
97 netdev_info(phydev->attached_dev,
98 "Link is Up - %s/%s - flow control %s\n",
99 phy_speed_to_str(phydev->speed),
100 phy_duplex_to_str(phydev->duplex),
101 phy_pause_str(phydev));
102 } else {
103 netdev_info(phydev->attached_dev, "Link is Down\n");
104 }
105}
106EXPORT_SYMBOL(phy_print_status);
107
108/**
109 * phy_clear_interrupt - Ack the phy device's interrupt
110 * @phydev: the phy_device struct
111 *
112 * If the @phydev driver has an ack_interrupt function, call it to
113 * ack and clear the phy device's interrupt.
114 *
115 * Returns 0 on success or < 0 on error.
116 */
117static int phy_clear_interrupt(struct phy_device *phydev)
118{
119 if (phydev->drv->ack_interrupt)
120 return phydev->drv->ack_interrupt(phydev);
121
122 return 0;
123}
124
125/**
126 * phy_config_interrupt - configure the PHY device for the requested interrupts
127 * @phydev: the phy_device struct
128 * @interrupts: interrupt flags to configure for this @phydev
129 *
130 * Returns 0 on success or < 0 on error.
131 */
132static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
133{
134 phydev->interrupts = interrupts ? 1 : 0;
135 if (phydev->drv->config_intr)
136 return phydev->drv->config_intr(phydev);
137
138 return 0;
139}
140
141/**
142 * phy_restart_aneg - restart auto-negotiation
143 * @phydev: target phy_device struct
144 *
145 * Restart the autonegotiation on @phydev. Returns >= 0 on success or
146 * negative errno on error.
147 */
148int phy_restart_aneg(struct phy_device *phydev)
149{
150 int ret;
151
152 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
153 ret = genphy_c45_restart_aneg(phydev);
154 else
155 ret = genphy_restart_aneg(phydev);
156
157 return ret;
158}
159EXPORT_SYMBOL_GPL(phy_restart_aneg);
160
161/**
162 * phy_aneg_done - return auto-negotiation status
163 * @phydev: target phy_device struct
164 *
165 * Description: Return the auto-negotiation status from this @phydev
166 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
167 * is still pending.
168 */
169int phy_aneg_done(struct phy_device *phydev)
170{
171 if (phydev->drv && phydev->drv->aneg_done)
172 return phydev->drv->aneg_done(phydev);
173 else if (phydev->is_c45)
174 return genphy_c45_aneg_done(phydev);
175 else
176 return genphy_aneg_done(phydev);
177}
178EXPORT_SYMBOL(phy_aneg_done);
179
180/**
181 * phy_find_valid - find a PHY setting that matches the requested parameters
182 * @speed: desired speed
183 * @duplex: desired duplex
184 * @supported: mask of supported link modes
185 *
186 * Locate a supported phy setting that is, in priority order:
187 * - an exact match for the specified speed and duplex mode
188 * - a match for the specified speed, or slower speed
189 * - the slowest supported speed
190 * Returns the matched phy_setting entry, or %NULL if no supported phy
191 * settings were found.
192 */
193static const struct phy_setting *
194phy_find_valid(int speed, int duplex, unsigned long *supported)
195{
196 return phy_lookup_setting(speed, duplex, supported, false);
197}
198
199/**
200 * phy_supported_speeds - return all speeds currently supported by a phy device
201 * @phy: The phy device to return supported speeds of.
202 * @speeds: buffer to store supported speeds in.
203 * @size: size of speeds buffer.
204 *
205 * Description: Returns the number of supported speeds, and fills the speeds
206 * buffer with the supported speeds. If speeds buffer is too small to contain
207 * all currently supported speeds, will return as many speeds as can fit.
208 */
209unsigned int phy_supported_speeds(struct phy_device *phy,
210 unsigned int *speeds,
211 unsigned int size)
212{
213 return phy_speeds(speeds, size, phy->supported);
214}
215
216/**
217 * phy_check_valid - check if there is a valid PHY setting which matches
218 * speed, duplex, and feature mask
219 * @speed: speed to match
220 * @duplex: duplex to match
221 * @features: A mask of the valid settings
222 *
223 * Description: Returns true if there is a valid setting, false otherwise.
224 */
225static inline bool phy_check_valid(int speed, int duplex,
226 unsigned long *features)
227{
228 return !!phy_lookup_setting(speed, duplex, features, true);
229}
230
231/**
232 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
233 * @phydev: the target phy_device struct
234 *
235 * Description: Make sure the PHY is set to supported speeds and
236 * duplexes. Drop down by one in this order: 1000/FULL,
237 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
238 */
239static void phy_sanitize_settings(struct phy_device *phydev)
240{
241 const struct phy_setting *setting;
242
243 setting = phy_find_valid(phydev->speed, phydev->duplex,
244 phydev->supported);
245 if (setting) {
246 phydev->speed = setting->speed;
247 phydev->duplex = setting->duplex;
248 } else {
249 /* We failed to find anything (no supported speeds?) */
250 phydev->speed = SPEED_UNKNOWN;
251 phydev->duplex = DUPLEX_UNKNOWN;
252 }
253}
254
255/**
256 * phy_ethtool_sset - generic ethtool sset function, handles all the details
257 * @phydev: target phy_device struct
258 * @cmd: ethtool_cmd
259 *
260 * A few notes about parameter checking:
261 *
262 * - We don't set port or transceiver, so we don't care what they
263 * were set to.
264 * - phy_start_aneg() will make sure forced settings are sane, and
265 * choose the next best ones from the ones selected, so we don't
266 * care if ethtool tries to give us bad values.
267 */
268int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
269{
270 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
271 u32 speed = ethtool_cmd_speed(cmd);
272
273 if (cmd->phy_address != phydev->mdio.addr)
274 return -EINVAL;
275
276 /* We make sure that we don't pass unsupported values in to the PHY */
277 ethtool_convert_legacy_u32_to_link_mode(advertising, cmd->advertising);
278 linkmode_and(advertising, advertising, phydev->supported);
279
280 /* Verify the settings we care about. */
281 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
282 return -EINVAL;
283
284 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
285 return -EINVAL;
286
287 if (cmd->autoneg == AUTONEG_DISABLE &&
288 ((speed != SPEED_1000 &&
289 speed != SPEED_100 &&
290 speed != SPEED_10) ||
291 (cmd->duplex != DUPLEX_HALF &&
292 cmd->duplex != DUPLEX_FULL)))
293 return -EINVAL;
294
295 phydev->autoneg = cmd->autoneg;
296
297 phydev->speed = speed;
298
299 linkmode_copy(phydev->advertising, advertising);
300
301 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
302 phydev->advertising, AUTONEG_ENABLE == cmd->autoneg);
303
304 phydev->duplex = cmd->duplex;
305
306 phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
307
308 /* Restart the PHY */
309 phy_start_aneg(phydev);
310
311 return 0;
312}
313EXPORT_SYMBOL(phy_ethtool_sset);
314
315int phy_ethtool_ksettings_set(struct phy_device *phydev,
316 const struct ethtool_link_ksettings *cmd)
317{
318 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
319 u8 autoneg = cmd->base.autoneg;
320 u8 duplex = cmd->base.duplex;
321 u32 speed = cmd->base.speed;
322
323 if (cmd->base.phy_address != phydev->mdio.addr)
324 return -EINVAL;
325
326 linkmode_copy(advertising, cmd->link_modes.advertising);
327
328 /* We make sure that we don't pass unsupported values in to the PHY */
329 linkmode_and(advertising, advertising, phydev->supported);
330
331 /* Verify the settings we care about. */
332 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
333 return -EINVAL;
334
335 if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
336 return -EINVAL;
337
338 if (autoneg == AUTONEG_DISABLE &&
339 ((speed != SPEED_1000 &&
340 speed != SPEED_100 &&
341 speed != SPEED_10) ||
342 (duplex != DUPLEX_HALF &&
343 duplex != DUPLEX_FULL)))
344 return -EINVAL;
345
346 phydev->autoneg = autoneg;
347
348 phydev->speed = speed;
349
350 linkmode_copy(phydev->advertising, advertising);
351
352 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
353 phydev->advertising, autoneg == AUTONEG_ENABLE);
354
355 phydev->duplex = duplex;
356
357 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
358
359 /* Restart the PHY */
360 phy_start_aneg(phydev);
361
362 return 0;
363}
364EXPORT_SYMBOL(phy_ethtool_ksettings_set);
365
366void phy_ethtool_ksettings_get(struct phy_device *phydev,
367 struct ethtool_link_ksettings *cmd)
368{
369 linkmode_copy(cmd->link_modes.supported, phydev->supported);
370 linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
371 linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
372
373 cmd->base.speed = phydev->speed;
374 cmd->base.duplex = phydev->duplex;
375 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
376 cmd->base.port = PORT_BNC;
377 else
378 cmd->base.port = PORT_MII;
379 cmd->base.transceiver = phy_is_internal(phydev) ?
380 XCVR_INTERNAL : XCVR_EXTERNAL;
381 cmd->base.phy_address = phydev->mdio.addr;
382 cmd->base.autoneg = phydev->autoneg;
383 cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
384 cmd->base.eth_tp_mdix = phydev->mdix;
385}
386EXPORT_SYMBOL(phy_ethtool_ksettings_get);
387
388/**
389 * phy_mii_ioctl - generic PHY MII ioctl interface
390 * @phydev: the phy_device struct
391 * @ifr: &struct ifreq for socket ioctl's
392 * @cmd: ioctl cmd to execute
393 *
394 * Note that this function is currently incompatible with the
395 * PHYCONTROL layer. It changes registers without regard to
396 * current state. Use at own risk.
397 */
398int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
399{
400 struct mii_ioctl_data *mii_data = if_mii(ifr);
401 u16 val = mii_data->val_in;
402 bool change_autoneg = false;
403 int prtad, devad;
404
405 switch (cmd) {
406 case SIOCGMIIPHY:
407 mii_data->phy_id = phydev->mdio.addr;
408 /* fall through */
409
410 case SIOCGMIIREG:
411 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
412 prtad = mdio_phy_id_prtad(mii_data->phy_id);
413 devad = mdio_phy_id_devad(mii_data->phy_id);
414 devad = MII_ADDR_C45 | devad << 16 | mii_data->reg_num;
415 } else {
416 prtad = mii_data->phy_id;
417 devad = mii_data->reg_num;
418 }
419 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
420 devad);
421 return 0;
422
423 case SIOCSMIIREG:
424 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
425 prtad = mdio_phy_id_prtad(mii_data->phy_id);
426 devad = mdio_phy_id_devad(mii_data->phy_id);
427 devad = MII_ADDR_C45 | devad << 16 | mii_data->reg_num;
428 } else {
429 prtad = mii_data->phy_id;
430 devad = mii_data->reg_num;
431 }
432 if (prtad == phydev->mdio.addr) {
433 switch (devad) {
434 case MII_BMCR:
435 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
436 if (phydev->autoneg == AUTONEG_ENABLE)
437 change_autoneg = true;
438 phydev->autoneg = AUTONEG_DISABLE;
439 if (val & BMCR_FULLDPLX)
440 phydev->duplex = DUPLEX_FULL;
441 else
442 phydev->duplex = DUPLEX_HALF;
443 if (val & BMCR_SPEED1000)
444 phydev->speed = SPEED_1000;
445 else if (val & BMCR_SPEED100)
446 phydev->speed = SPEED_100;
447 else phydev->speed = SPEED_10;
448 }
449 else {
450 if (phydev->autoneg == AUTONEG_DISABLE)
451 change_autoneg = true;
452 phydev->autoneg = AUTONEG_ENABLE;
453 }
454 break;
455 case MII_ADVERTISE:
456 mii_adv_mod_linkmode_adv_t(phydev->advertising,
457 val);
458 change_autoneg = true;
459 break;
460 case MII_CTRL1000:
461 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
462 val);
463 change_autoneg = true;
464 break;
465 default:
466 /* do nothing */
467 break;
468 }
469 }
470
471 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
472
473 if (prtad == phydev->mdio.addr &&
474 devad == MII_BMCR &&
475 val & BMCR_RESET)
476 return phy_init_hw(phydev);
477
478 if (change_autoneg)
479 return phy_start_aneg(phydev);
480
481 return 0;
482
483 case SIOCSHWTSTAMP:
484 if (phydev->drv && phydev->drv->hwtstamp)
485 return phydev->drv->hwtstamp(phydev, ifr);
486 /* fall through */
487
488 default:
489 return -EOPNOTSUPP;
490 }
491}
492EXPORT_SYMBOL(phy_mii_ioctl);
493
494void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
495{
496 mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
497 jiffies);
498}
499EXPORT_SYMBOL(phy_queue_state_machine);
500
501static void phy_trigger_machine(struct phy_device *phydev)
502{
503 phy_queue_state_machine(phydev, 0);
504}
505
506static int phy_config_aneg(struct phy_device *phydev)
507{
508 if (phydev->drv->config_aneg)
509 return phydev->drv->config_aneg(phydev);
510
511 /* Clause 45 PHYs that don't implement Clause 22 registers are not
512 * allowed to call genphy_config_aneg()
513 */
514 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
515 return genphy_c45_config_aneg(phydev);
516
517 return genphy_config_aneg(phydev);
518}
519
520/**
521 * phy_check_link_status - check link status and set state accordingly
522 * @phydev: the phy_device struct
523 *
524 * Description: Check for link and whether autoneg was triggered / is running
525 * and set state accordingly
526 */
527static int phy_check_link_status(struct phy_device *phydev)
528{
529 int err;
530
531 WARN_ON(!mutex_is_locked(&phydev->lock));
532
533 /* Keep previous state if loopback is enabled because some PHYs
534 * report that Link is Down when loopback is enabled.
535 */
536 if (phydev->loopback_enabled)
537 return 0;
538
539 err = phy_read_status(phydev);
540 if (err)
541 return err;
542
543 if (phydev->link && phydev->state != PHY_RUNNING) {
544 phydev->state = PHY_RUNNING;
545 phy_link_up(phydev);
546 } else if (!phydev->link && phydev->state != PHY_NOLINK) {
547 phydev->state = PHY_NOLINK;
548 phy_link_down(phydev, true);
549 }
550
551 return 0;
552}
553
554/**
555 * phy_start_aneg - start auto-negotiation for this PHY device
556 * @phydev: the phy_device struct
557 *
558 * Description: Sanitizes the settings (if we're not autonegotiating
559 * them), and then calls the driver's config_aneg function.
560 * If the PHYCONTROL Layer is operating, we change the state to
561 * reflect the beginning of Auto-negotiation or forcing.
562 */
563int phy_start_aneg(struct phy_device *phydev)
564{
565 int err;
566
567 if (!phydev->drv)
568 return -EIO;
569
570 mutex_lock(&phydev->lock);
571
572 if (AUTONEG_DISABLE == phydev->autoneg)
573 phy_sanitize_settings(phydev);
574
575 err = phy_config_aneg(phydev);
576 if (err < 0)
577 goto out_unlock;
578
579 if (phy_is_started(phydev))
580 err = phy_check_link_status(phydev);
581out_unlock:
582 mutex_unlock(&phydev->lock);
583
584 return err;
585}
586EXPORT_SYMBOL(phy_start_aneg);
587
588static int phy_poll_aneg_done(struct phy_device *phydev)
589{
590 unsigned int retries = 100;
591 int ret;
592
593 do {
594 msleep(100);
595 ret = phy_aneg_done(phydev);
596 } while (!ret && --retries);
597
598 if (!ret)
599 return -ETIMEDOUT;
600
601 return ret < 0 ? ret : 0;
602}
603
604/**
605 * phy_speed_down - set speed to lowest speed supported by both link partners
606 * @phydev: the phy_device struct
607 * @sync: perform action synchronously
608 *
609 * Description: Typically used to save energy when waiting for a WoL packet
610 *
611 * WARNING: Setting sync to false may cause the system being unable to suspend
612 * in case the PHY generates an interrupt when finishing the autonegotiation.
613 * This interrupt may wake up the system immediately after suspend.
614 * Therefore use sync = false only if you're sure it's safe with the respective
615 * network chip.
616 */
617int phy_speed_down(struct phy_device *phydev, bool sync)
618{
619 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
620 int ret;
621
622 if (phydev->autoneg != AUTONEG_ENABLE)
623 return 0;
624
625 linkmode_copy(adv_tmp, phydev->advertising);
626
627 ret = phy_speed_down_core(phydev);
628 if (ret)
629 return ret;
630
631 linkmode_copy(phydev->adv_old, adv_tmp);
632
633 if (linkmode_equal(phydev->advertising, adv_tmp))
634 return 0;
635
636 ret = phy_config_aneg(phydev);
637 if (ret)
638 return ret;
639
640 return sync ? phy_poll_aneg_done(phydev) : 0;
641}
642EXPORT_SYMBOL_GPL(phy_speed_down);
643
644/**
645 * phy_speed_up - (re)set advertised speeds to all supported speeds
646 * @phydev: the phy_device struct
647 *
648 * Description: Used to revert the effect of phy_speed_down
649 */
650int phy_speed_up(struct phy_device *phydev)
651{
652 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
653
654 if (phydev->autoneg != AUTONEG_ENABLE)
655 return 0;
656
657 if (linkmode_empty(phydev->adv_old))
658 return 0;
659
660 linkmode_copy(adv_tmp, phydev->advertising);
661 linkmode_copy(phydev->advertising, phydev->adv_old);
662 linkmode_zero(phydev->adv_old);
663
664 if (linkmode_equal(phydev->advertising, adv_tmp))
665 return 0;
666
667 return phy_config_aneg(phydev);
668}
669EXPORT_SYMBOL_GPL(phy_speed_up);
670
671/**
672 * phy_start_machine - start PHY state machine tracking
673 * @phydev: the phy_device struct
674 *
675 * Description: The PHY infrastructure can run a state machine
676 * which tracks whether the PHY is starting up, negotiating,
677 * etc. This function starts the delayed workqueue which tracks
678 * the state of the PHY. If you want to maintain your own state machine,
679 * do not call this function.
680 */
681void phy_start_machine(struct phy_device *phydev)
682{
683 phy_trigger_machine(phydev);
684}
685EXPORT_SYMBOL_GPL(phy_start_machine);
686
687/**
688 * phy_stop_machine - stop the PHY state machine tracking
689 * @phydev: target phy_device struct
690 *
691 * Description: Stops the state machine delayed workqueue, sets the
692 * state to UP (unless it wasn't up yet). This function must be
693 * called BEFORE phy_detach.
694 */
695void phy_stop_machine(struct phy_device *phydev)
696{
697 cancel_delayed_work_sync(&phydev->state_queue);
698
699 mutex_lock(&phydev->lock);
700 if (phy_is_started(phydev))
701 phydev->state = PHY_UP;
702 mutex_unlock(&phydev->lock);
703}
704
705/**
706 * phy_error - enter HALTED state for this PHY device
707 * @phydev: target phy_device struct
708 *
709 * Moves the PHY to the HALTED state in response to a read
710 * or write error, and tells the controller the link is down.
711 * Must not be called from interrupt context, or while the
712 * phydev->lock is held.
713 */
714static void phy_error(struct phy_device *phydev)
715{
716 WARN_ON(1);
717
718 mutex_lock(&phydev->lock);
719 phydev->state = PHY_HALTED;
720 mutex_unlock(&phydev->lock);
721
722 phy_trigger_machine(phydev);
723}
724
725/**
726 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
727 * @phydev: target phy_device struct
728 */
729static int phy_disable_interrupts(struct phy_device *phydev)
730{
731 int err;
732
733 /* Disable PHY interrupts */
734 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
735 if (err)
736 return err;
737
738 /* Clear the interrupt */
739 return phy_clear_interrupt(phydev);
740}
741
742/**
743 * phy_interrupt - PHY interrupt handler
744 * @irq: interrupt line
745 * @phy_dat: phy_device pointer
746 *
747 * Description: Handle PHY interrupt
748 */
749static irqreturn_t phy_interrupt(int irq, void *phy_dat)
750{
751 struct phy_device *phydev = phy_dat;
752
753 if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev))
754 return IRQ_NONE;
755
756 if (phydev->drv->handle_interrupt) {
757 if (phydev->drv->handle_interrupt(phydev))
758 goto phy_err;
759 } else {
760 /* reschedule state queue work to run as soon as possible */
761 phy_trigger_machine(phydev);
762 }
763
764 if (phy_clear_interrupt(phydev))
765 goto phy_err;
766 return IRQ_HANDLED;
767
768phy_err:
769 phy_error(phydev);
770 return IRQ_NONE;
771}
772
773/**
774 * phy_enable_interrupts - Enable the interrupts from the PHY side
775 * @phydev: target phy_device struct
776 */
777static int phy_enable_interrupts(struct phy_device *phydev)
778{
779 int err = phy_clear_interrupt(phydev);
780
781 if (err < 0)
782 return err;
783
784 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
785}
786
787/**
788 * phy_request_interrupt - request and enable interrupt for a PHY device
789 * @phydev: target phy_device struct
790 *
791 * Description: Request and enable the interrupt for the given PHY.
792 * If this fails, then we set irq to PHY_POLL.
793 * This should only be called with a valid IRQ number.
794 */
795void phy_request_interrupt(struct phy_device *phydev)
796{
797 int err;
798
799 err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
800 IRQF_ONESHOT | IRQF_SHARED,
801 phydev_name(phydev), phydev);
802 if (err) {
803 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
804 err, phydev->irq);
805 phydev->irq = PHY_POLL;
806 } else {
807 if (phy_enable_interrupts(phydev)) {
808 phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
809 phy_free_interrupt(phydev);
810 phydev->irq = PHY_POLL;
811 }
812 }
813}
814EXPORT_SYMBOL(phy_request_interrupt);
815
816/**
817 * phy_free_interrupt - disable and free interrupt for a PHY device
818 * @phydev: target phy_device struct
819 *
820 * Description: Disable and free the interrupt for the given PHY.
821 * This should only be called with a valid IRQ number.
822 */
823void phy_free_interrupt(struct phy_device *phydev)
824{
825 phy_disable_interrupts(phydev);
826 free_irq(phydev->irq, phydev);
827}
828EXPORT_SYMBOL(phy_free_interrupt);
829
830/**
831 * phy_stop - Bring down the PHY link, and stop checking the status
832 * @phydev: target phy_device struct
833 */
834void phy_stop(struct phy_device *phydev)
835{
836 if (!phy_is_started(phydev)) {
837 WARN(1, "called from state %s\n",
838 phy_state_to_str(phydev->state));
839 return;
840 }
841
842 mutex_lock(&phydev->lock);
843
844 phydev->state = PHY_HALTED;
845
846 mutex_unlock(&phydev->lock);
847
848 phy_state_machine(&phydev->state_queue.work);
849 phy_stop_machine(phydev);
850
851 /* Cannot call flush_scheduled_work() here as desired because
852 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
853 * will not reenable interrupts.
854 */
855}
856EXPORT_SYMBOL(phy_stop);
857
858/**
859 * phy_start - start or restart a PHY device
860 * @phydev: target phy_device struct
861 *
862 * Description: Indicates the attached device's readiness to
863 * handle PHY-related work. Used during startup to start the
864 * PHY, and after a call to phy_stop() to resume operation.
865 * Also used to indicate the MDIO bus has cleared an error
866 * condition.
867 */
868void phy_start(struct phy_device *phydev)
869{
870 mutex_lock(&phydev->lock);
871
872 if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
873 WARN(1, "called from state %s\n",
874 phy_state_to_str(phydev->state));
875 goto out;
876 }
877
878 /* if phy was suspended, bring the physical link up again */
879 __phy_resume(phydev);
880
881 phydev->state = PHY_UP;
882
883 phy_start_machine(phydev);
884out:
885 mutex_unlock(&phydev->lock);
886}
887EXPORT_SYMBOL(phy_start);
888
889/**
890 * phy_state_machine - Handle the state machine
891 * @work: work_struct that describes the work to be done
892 */
893void phy_state_machine(struct work_struct *work)
894{
895 struct delayed_work *dwork = to_delayed_work(work);
896 struct phy_device *phydev =
897 container_of(dwork, struct phy_device, state_queue);
898 bool needs_aneg = false, do_suspend = false;
899 enum phy_state old_state;
900 int err = 0;
901
902 mutex_lock(&phydev->lock);
903
904 old_state = phydev->state;
905
906 switch (phydev->state) {
907 case PHY_DOWN:
908 case PHY_READY:
909 break;
910 case PHY_UP:
911 needs_aneg = true;
912
913 break;
914 case PHY_NOLINK:
915 case PHY_RUNNING:
916 err = phy_check_link_status(phydev);
917 break;
918 case PHY_HALTED:
919 if (phydev->link) {
920 phydev->link = 0;
921 phy_link_down(phydev, true);
922 }
923 do_suspend = true;
924 break;
925 }
926
927 mutex_unlock(&phydev->lock);
928
929 if (needs_aneg)
930 err = phy_start_aneg(phydev);
931 else if (do_suspend)
932 phy_suspend(phydev);
933
934 if (err < 0)
935 phy_error(phydev);
936
937 if (old_state != phydev->state) {
938 phydev_dbg(phydev, "PHY state change %s -> %s\n",
939 phy_state_to_str(old_state),
940 phy_state_to_str(phydev->state));
941 if (phydev->drv && phydev->drv->link_change_notify)
942 phydev->drv->link_change_notify(phydev);
943 }
944
945 /* Only re-schedule a PHY state machine change if we are polling the
946 * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
947 * between states from phy_mac_interrupt().
948 *
949 * In state PHY_HALTED the PHY gets suspended, so rescheduling the
950 * state machine would be pointless and possibly error prone when
951 * called from phy_disconnect() synchronously.
952 */
953 mutex_lock(&phydev->lock);
954 if (phy_polling_mode(phydev) && phy_is_started(phydev))
955 phy_queue_state_machine(phydev, PHY_STATE_TIME);
956 mutex_unlock(&phydev->lock);
957}
958
959/**
960 * phy_mac_interrupt - MAC says the link has changed
961 * @phydev: phy_device struct with changed link
962 *
963 * The MAC layer is able to indicate there has been a change in the PHY link
964 * status. Trigger the state machine and work a work queue.
965 */
966void phy_mac_interrupt(struct phy_device *phydev)
967{
968 /* Trigger a state machine change */
969 phy_trigger_machine(phydev);
970}
971EXPORT_SYMBOL(phy_mac_interrupt);
972
973static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
974{
975 linkmode_zero(advertising);
976
977 if (eee_adv & MDIO_EEE_100TX)
978 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
979 advertising);
980 if (eee_adv & MDIO_EEE_1000T)
981 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
982 advertising);
983 if (eee_adv & MDIO_EEE_10GT)
984 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
985 advertising);
986 if (eee_adv & MDIO_EEE_1000KX)
987 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
988 advertising);
989 if (eee_adv & MDIO_EEE_10GKX4)
990 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
991 advertising);
992 if (eee_adv & MDIO_EEE_10GKR)
993 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
994 advertising);
995}
996
997/**
998 * phy_init_eee - init and check the EEE feature
999 * @phydev: target phy_device struct
1000 * @clk_stop_enable: PHY may stop the clock during LPI
1001 *
1002 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1003 * is supported by looking at the MMD registers 3.20 and 7.60/61
1004 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1005 * bit if required.
1006 */
1007int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1008{
1009 if (!phydev->drv)
1010 return -EIO;
1011
1012 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1013 */
1014 if (phydev->duplex == DUPLEX_FULL) {
1015 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1016 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1017 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1018 int eee_lp, eee_cap, eee_adv;
1019 int status;
1020 u32 cap;
1021
1022 /* Read phy status to properly get the right settings */
1023 status = phy_read_status(phydev);
1024 if (status)
1025 return status;
1026
1027 /* First check if the EEE ability is supported */
1028 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1029 if (eee_cap <= 0)
1030 goto eee_exit_err;
1031
1032 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1033 if (!cap)
1034 goto eee_exit_err;
1035
1036 /* Check which link settings negotiated and verify it in
1037 * the EEE advertising registers.
1038 */
1039 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1040 if (eee_lp <= 0)
1041 goto eee_exit_err;
1042
1043 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1044 if (eee_adv <= 0)
1045 goto eee_exit_err;
1046
1047 mmd_eee_adv_to_linkmode(adv, eee_adv);
1048 mmd_eee_adv_to_linkmode(lp, eee_lp);
1049 linkmode_and(common, adv, lp);
1050
1051 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1052 goto eee_exit_err;
1053
1054 if (clk_stop_enable)
1055 /* Configure the PHY to stop receiving xMII
1056 * clock while it is signaling LPI.
1057 */
1058 phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1059 MDIO_PCS_CTRL1_CLKSTOP_EN);
1060
1061 return 0; /* EEE supported */
1062 }
1063eee_exit_err:
1064 return -EPROTONOSUPPORT;
1065}
1066EXPORT_SYMBOL(phy_init_eee);
1067
1068/**
1069 * phy_get_eee_err - report the EEE wake error count
1070 * @phydev: target phy_device struct
1071 *
1072 * Description: it is to report the number of time where the PHY
1073 * failed to complete its normal wake sequence.
1074 */
1075int phy_get_eee_err(struct phy_device *phydev)
1076{
1077 if (!phydev->drv)
1078 return -EIO;
1079
1080 return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1081}
1082EXPORT_SYMBOL(phy_get_eee_err);
1083
1084/**
1085 * phy_ethtool_get_eee - get EEE supported and status
1086 * @phydev: target phy_device struct
1087 * @data: ethtool_eee data
1088 *
1089 * Description: it reportes the Supported/Advertisement/LP Advertisement
1090 * capabilities.
1091 */
1092int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1093{
1094 int val;
1095
1096 if (!phydev->drv)
1097 return -EIO;
1098
1099 /* Get Supported EEE */
1100 val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1101 if (val < 0)
1102 return val;
1103 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1104
1105 /* Get advertisement EEE */
1106 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1107 if (val < 0)
1108 return val;
1109 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1110 data->eee_enabled = !!data->advertised;
1111
1112 /* Get LP advertisement EEE */
1113 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1114 if (val < 0)
1115 return val;
1116 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1117
1118 data->eee_active = !!(data->advertised & data->lp_advertised);
1119
1120 return 0;
1121}
1122EXPORT_SYMBOL(phy_ethtool_get_eee);
1123
1124/**
1125 * phy_ethtool_set_eee - set EEE supported and status
1126 * @phydev: target phy_device struct
1127 * @data: ethtool_eee data
1128 *
1129 * Description: it is to program the Advertisement EEE register.
1130 */
1131int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1132{
1133 int cap, old_adv, adv = 0, ret;
1134
1135 if (!phydev->drv)
1136 return -EIO;
1137
1138 /* Get Supported EEE */
1139 cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1140 if (cap < 0)
1141 return cap;
1142
1143 old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1144 if (old_adv < 0)
1145 return old_adv;
1146
1147 if (data->eee_enabled) {
1148 adv = !data->advertised ? cap :
1149 ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1150 /* Mask prohibited EEE modes */
1151 adv &= ~phydev->eee_broken_modes;
1152 }
1153
1154 if (old_adv != adv) {
1155 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1156 if (ret < 0)
1157 return ret;
1158
1159 /* Restart autonegotiation so the new modes get sent to the
1160 * link partner.
1161 */
1162 ret = phy_restart_aneg(phydev);
1163 if (ret < 0)
1164 return ret;
1165 }
1166
1167 return 0;
1168}
1169EXPORT_SYMBOL(phy_ethtool_set_eee);
1170
1171int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1172{
1173 if (phydev->drv && phydev->drv->set_wol)
1174 return phydev->drv->set_wol(phydev, wol);
1175
1176 return -EOPNOTSUPP;
1177}
1178EXPORT_SYMBOL(phy_ethtool_set_wol);
1179
1180void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1181{
1182 if (phydev->drv && phydev->drv->get_wol)
1183 phydev->drv->get_wol(phydev, wol);
1184}
1185EXPORT_SYMBOL(phy_ethtool_get_wol);
1186
1187int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1188 struct ethtool_link_ksettings *cmd)
1189{
1190 struct phy_device *phydev = ndev->phydev;
1191
1192 if (!phydev)
1193 return -ENODEV;
1194
1195 phy_ethtool_ksettings_get(phydev, cmd);
1196
1197 return 0;
1198}
1199EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1200
1201int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1202 const struct ethtool_link_ksettings *cmd)
1203{
1204 struct phy_device *phydev = ndev->phydev;
1205
1206 if (!phydev)
1207 return -ENODEV;
1208
1209 return phy_ethtool_ksettings_set(phydev, cmd);
1210}
1211EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1212
1213int phy_ethtool_nway_reset(struct net_device *ndev)
1214{
1215 struct phy_device *phydev = ndev->phydev;
1216
1217 if (!phydev)
1218 return -ENODEV;
1219
1220 if (!phydev->drv)
1221 return -EIO;
1222
1223 return phy_restart_aneg(phydev);
1224}
1225EXPORT_SYMBOL(phy_ethtool_nway_reset);