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