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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 <net/netlink.h>
35#include <net/genetlink.h>
36#include <net/sock.h>
37
38#define PHY_STATE_TIME HZ
39
40#define PHY_STATE_STR(_state) \
41 case PHY_##_state: \
42 return __stringify(_state); \
43
44static const char *phy_state_to_str(enum phy_state st)
45{
46 switch (st) {
47 PHY_STATE_STR(DOWN)
48 PHY_STATE_STR(READY)
49 PHY_STATE_STR(UP)
50 PHY_STATE_STR(RUNNING)
51 PHY_STATE_STR(NOLINK)
52 PHY_STATE_STR(CABLETEST)
53 PHY_STATE_STR(HALTED)
54 }
55
56 return NULL;
57}
58
59static void phy_link_up(struct phy_device *phydev)
60{
61 phydev->phy_link_change(phydev, true);
62 phy_led_trigger_change_speed(phydev);
63}
64
65static void phy_link_down(struct phy_device *phydev)
66{
67 phydev->phy_link_change(phydev, false);
68 phy_led_trigger_change_speed(phydev);
69}
70
71static const char *phy_pause_str(struct phy_device *phydev)
72{
73 bool local_pause, local_asym_pause;
74
75 if (phydev->autoneg == AUTONEG_DISABLE)
76 goto no_pause;
77
78 local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
79 phydev->advertising);
80 local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
81 phydev->advertising);
82
83 if (local_pause && phydev->pause)
84 return "rx/tx";
85
86 if (local_asym_pause && phydev->asym_pause) {
87 if (local_pause)
88 return "rx";
89 if (phydev->pause)
90 return "tx";
91 }
92
93no_pause:
94 return "off";
95}
96
97/**
98 * phy_print_status - Convenience function to print out the current phy status
99 * @phydev: the phy_device struct
100 */
101void phy_print_status(struct phy_device *phydev)
102{
103 if (phydev->link) {
104 netdev_info(phydev->attached_dev,
105 "Link is Up - %s/%s %s- flow control %s\n",
106 phy_speed_to_str(phydev->speed),
107 phy_duplex_to_str(phydev->duplex),
108 phydev->downshifted_rate ? "(downshifted) " : "",
109 phy_pause_str(phydev));
110 } else {
111 netdev_info(phydev->attached_dev, "Link is Down\n");
112 }
113}
114EXPORT_SYMBOL(phy_print_status);
115
116/**
117 * phy_config_interrupt - configure the PHY device for the requested interrupts
118 * @phydev: the phy_device struct
119 * @interrupts: interrupt flags to configure for this @phydev
120 *
121 * Returns 0 on success or < 0 on error.
122 */
123static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
124{
125 phydev->interrupts = interrupts ? 1 : 0;
126 if (phydev->drv->config_intr)
127 return phydev->drv->config_intr(phydev);
128
129 return 0;
130}
131
132/**
133 * phy_restart_aneg - restart auto-negotiation
134 * @phydev: target phy_device struct
135 *
136 * Restart the autonegotiation on @phydev. Returns >= 0 on success or
137 * negative errno on error.
138 */
139int phy_restart_aneg(struct phy_device *phydev)
140{
141 int ret;
142
143 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
144 ret = genphy_c45_restart_aneg(phydev);
145 else
146 ret = genphy_restart_aneg(phydev);
147
148 return ret;
149}
150EXPORT_SYMBOL_GPL(phy_restart_aneg);
151
152/**
153 * phy_aneg_done - return auto-negotiation status
154 * @phydev: target phy_device struct
155 *
156 * Description: Return the auto-negotiation status from this @phydev
157 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
158 * is still pending.
159 */
160int phy_aneg_done(struct phy_device *phydev)
161{
162 if (phydev->drv && phydev->drv->aneg_done)
163 return phydev->drv->aneg_done(phydev);
164 else if (phydev->is_c45)
165 return genphy_c45_aneg_done(phydev);
166 else
167 return genphy_aneg_done(phydev);
168}
169EXPORT_SYMBOL(phy_aneg_done);
170
171/**
172 * phy_find_valid - find a PHY setting that matches the requested parameters
173 * @speed: desired speed
174 * @duplex: desired duplex
175 * @supported: mask of supported link modes
176 *
177 * Locate a supported phy setting that is, in priority order:
178 * - an exact match for the specified speed and duplex mode
179 * - a match for the specified speed, or slower speed
180 * - the slowest supported speed
181 * Returns the matched phy_setting entry, or %NULL if no supported phy
182 * settings were found.
183 */
184static const struct phy_setting *
185phy_find_valid(int speed, int duplex, unsigned long *supported)
186{
187 return phy_lookup_setting(speed, duplex, supported, false);
188}
189
190/**
191 * phy_supported_speeds - return all speeds currently supported by a phy device
192 * @phy: The phy device to return supported speeds of.
193 * @speeds: buffer to store supported speeds in.
194 * @size: size of speeds buffer.
195 *
196 * Description: Returns the number of supported speeds, and fills the speeds
197 * buffer with the supported speeds. If speeds buffer is too small to contain
198 * all currently supported speeds, will return as many speeds as can fit.
199 */
200unsigned int phy_supported_speeds(struct phy_device *phy,
201 unsigned int *speeds,
202 unsigned int size)
203{
204 return phy_speeds(speeds, size, phy->supported);
205}
206
207/**
208 * phy_check_valid - check if there is a valid PHY setting which matches
209 * speed, duplex, and feature mask
210 * @speed: speed to match
211 * @duplex: duplex to match
212 * @features: A mask of the valid settings
213 *
214 * Description: Returns true if there is a valid setting, false otherwise.
215 */
216static inline bool phy_check_valid(int speed, int duplex,
217 unsigned long *features)
218{
219 return !!phy_lookup_setting(speed, duplex, features, true);
220}
221
222/**
223 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
224 * @phydev: the target phy_device struct
225 *
226 * Description: Make sure the PHY is set to supported speeds and
227 * duplexes. Drop down by one in this order: 1000/FULL,
228 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
229 */
230static void phy_sanitize_settings(struct phy_device *phydev)
231{
232 const struct phy_setting *setting;
233
234 setting = phy_find_valid(phydev->speed, phydev->duplex,
235 phydev->supported);
236 if (setting) {
237 phydev->speed = setting->speed;
238 phydev->duplex = setting->duplex;
239 } else {
240 /* We failed to find anything (no supported speeds?) */
241 phydev->speed = SPEED_UNKNOWN;
242 phydev->duplex = DUPLEX_UNKNOWN;
243 }
244}
245
246int phy_ethtool_ksettings_set(struct phy_device *phydev,
247 const struct ethtool_link_ksettings *cmd)
248{
249 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
250 u8 autoneg = cmd->base.autoneg;
251 u8 duplex = cmd->base.duplex;
252 u32 speed = cmd->base.speed;
253
254 if (cmd->base.phy_address != phydev->mdio.addr)
255 return -EINVAL;
256
257 linkmode_copy(advertising, cmd->link_modes.advertising);
258
259 /* We make sure that we don't pass unsupported values in to the PHY */
260 linkmode_and(advertising, advertising, phydev->supported);
261
262 /* Verify the settings we care about. */
263 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
264 return -EINVAL;
265
266 if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
267 return -EINVAL;
268
269 if (autoneg == AUTONEG_DISABLE &&
270 ((speed != SPEED_1000 &&
271 speed != SPEED_100 &&
272 speed != SPEED_10) ||
273 (duplex != DUPLEX_HALF &&
274 duplex != DUPLEX_FULL)))
275 return -EINVAL;
276
277 phydev->autoneg = autoneg;
278
279 if (autoneg == AUTONEG_DISABLE) {
280 phydev->speed = speed;
281 phydev->duplex = duplex;
282 }
283
284 linkmode_copy(phydev->advertising, advertising);
285
286 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
287 phydev->advertising, autoneg == AUTONEG_ENABLE);
288
289 phydev->master_slave_set = cmd->base.master_slave_cfg;
290 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
291
292 /* Restart the PHY */
293 phy_start_aneg(phydev);
294
295 return 0;
296}
297EXPORT_SYMBOL(phy_ethtool_ksettings_set);
298
299void phy_ethtool_ksettings_get(struct phy_device *phydev,
300 struct ethtool_link_ksettings *cmd)
301{
302 linkmode_copy(cmd->link_modes.supported, phydev->supported);
303 linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
304 linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
305
306 cmd->base.speed = phydev->speed;
307 cmd->base.duplex = phydev->duplex;
308 cmd->base.master_slave_cfg = phydev->master_slave_get;
309 cmd->base.master_slave_state = phydev->master_slave_state;
310 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
311 cmd->base.port = PORT_BNC;
312 else
313 cmd->base.port = phydev->port;
314 cmd->base.transceiver = phy_is_internal(phydev) ?
315 XCVR_INTERNAL : XCVR_EXTERNAL;
316 cmd->base.phy_address = phydev->mdio.addr;
317 cmd->base.autoneg = phydev->autoneg;
318 cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
319 cmd->base.eth_tp_mdix = phydev->mdix;
320}
321EXPORT_SYMBOL(phy_ethtool_ksettings_get);
322
323/**
324 * phy_mii_ioctl - generic PHY MII ioctl interface
325 * @phydev: the phy_device struct
326 * @ifr: &struct ifreq for socket ioctl's
327 * @cmd: ioctl cmd to execute
328 *
329 * Note that this function is currently incompatible with the
330 * PHYCONTROL layer. It changes registers without regard to
331 * current state. Use at own risk.
332 */
333int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
334{
335 struct mii_ioctl_data *mii_data = if_mii(ifr);
336 u16 val = mii_data->val_in;
337 bool change_autoneg = false;
338 int prtad, devad;
339
340 switch (cmd) {
341 case SIOCGMIIPHY:
342 mii_data->phy_id = phydev->mdio.addr;
343 fallthrough;
344
345 case SIOCGMIIREG:
346 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
347 prtad = mdio_phy_id_prtad(mii_data->phy_id);
348 devad = mdio_phy_id_devad(mii_data->phy_id);
349 devad = mdiobus_c45_addr(devad, mii_data->reg_num);
350 } else {
351 prtad = mii_data->phy_id;
352 devad = mii_data->reg_num;
353 }
354 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
355 devad);
356 return 0;
357
358 case SIOCSMIIREG:
359 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
360 prtad = mdio_phy_id_prtad(mii_data->phy_id);
361 devad = mdio_phy_id_devad(mii_data->phy_id);
362 devad = mdiobus_c45_addr(devad, mii_data->reg_num);
363 } else {
364 prtad = mii_data->phy_id;
365 devad = mii_data->reg_num;
366 }
367 if (prtad == phydev->mdio.addr) {
368 switch (devad) {
369 case MII_BMCR:
370 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
371 if (phydev->autoneg == AUTONEG_ENABLE)
372 change_autoneg = true;
373 phydev->autoneg = AUTONEG_DISABLE;
374 if (val & BMCR_FULLDPLX)
375 phydev->duplex = DUPLEX_FULL;
376 else
377 phydev->duplex = DUPLEX_HALF;
378 if (val & BMCR_SPEED1000)
379 phydev->speed = SPEED_1000;
380 else if (val & BMCR_SPEED100)
381 phydev->speed = SPEED_100;
382 else phydev->speed = SPEED_10;
383 } else {
384 if (phydev->autoneg == AUTONEG_DISABLE)
385 change_autoneg = true;
386 phydev->autoneg = AUTONEG_ENABLE;
387 }
388 break;
389 case MII_ADVERTISE:
390 mii_adv_mod_linkmode_adv_t(phydev->advertising,
391 val);
392 change_autoneg = true;
393 break;
394 case MII_CTRL1000:
395 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
396 val);
397 change_autoneg = true;
398 break;
399 default:
400 /* do nothing */
401 break;
402 }
403 }
404
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 return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
420 fallthrough;
421
422 default:
423 return -EOPNOTSUPP;
424 }
425}
426EXPORT_SYMBOL(phy_mii_ioctl);
427
428/**
429 * phy_do_ioctl - generic ndo_do_ioctl implementation
430 * @dev: the net_device struct
431 * @ifr: &struct ifreq for socket ioctl's
432 * @cmd: ioctl cmd to execute
433 */
434int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
435{
436 if (!dev->phydev)
437 return -ENODEV;
438
439 return phy_mii_ioctl(dev->phydev, ifr, cmd);
440}
441EXPORT_SYMBOL(phy_do_ioctl);
442
443/**
444 * phy_do_ioctl_running - generic ndo_do_ioctl implementation but test first
445 *
446 * @dev: the net_device struct
447 * @ifr: &struct ifreq for socket ioctl's
448 * @cmd: ioctl cmd to execute
449 *
450 * Same as phy_do_ioctl, but ensures that net_device is running before
451 * handling the ioctl.
452 */
453int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
454{
455 if (!netif_running(dev))
456 return -ENODEV;
457
458 return phy_do_ioctl(dev, ifr, cmd);
459}
460EXPORT_SYMBOL(phy_do_ioctl_running);
461
462/**
463 * phy_queue_state_machine - Trigger the state machine to run soon
464 *
465 * @phydev: the phy_device struct
466 * @jiffies: Run the state machine after these jiffies
467 */
468void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
469{
470 mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
471 jiffies);
472}
473EXPORT_SYMBOL(phy_queue_state_machine);
474
475/**
476 * phy_trigger_machine - Trigger the state machine to run now
477 *
478 * @phydev: the phy_device struct
479 */
480void phy_trigger_machine(struct phy_device *phydev)
481{
482 phy_queue_state_machine(phydev, 0);
483}
484EXPORT_SYMBOL(phy_trigger_machine);
485
486static void phy_abort_cable_test(struct phy_device *phydev)
487{
488 int err;
489
490 ethnl_cable_test_finished(phydev);
491
492 err = phy_init_hw(phydev);
493 if (err)
494 phydev_err(phydev, "Error while aborting cable test");
495}
496
497/**
498 * phy_ethtool_get_strings - Get the statistic counter names
499 *
500 * @phydev: the phy_device struct
501 * @data: Where to put the strings
502 */
503int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
504{
505 if (!phydev->drv)
506 return -EIO;
507
508 mutex_lock(&phydev->lock);
509 phydev->drv->get_strings(phydev, data);
510 mutex_unlock(&phydev->lock);
511
512 return 0;
513}
514EXPORT_SYMBOL(phy_ethtool_get_strings);
515
516/**
517 * phy_ethtool_get_sset_count - Get the number of statistic counters
518 *
519 * @phydev: the phy_device struct
520 */
521int phy_ethtool_get_sset_count(struct phy_device *phydev)
522{
523 int ret;
524
525 if (!phydev->drv)
526 return -EIO;
527
528 if (phydev->drv->get_sset_count &&
529 phydev->drv->get_strings &&
530 phydev->drv->get_stats) {
531 mutex_lock(&phydev->lock);
532 ret = phydev->drv->get_sset_count(phydev);
533 mutex_unlock(&phydev->lock);
534
535 return ret;
536 }
537
538 return -EOPNOTSUPP;
539}
540EXPORT_SYMBOL(phy_ethtool_get_sset_count);
541
542/**
543 * phy_ethtool_get_stats - Get the statistic counters
544 *
545 * @phydev: the phy_device struct
546 * @stats: What counters to get
547 * @data: Where to store the counters
548 */
549int phy_ethtool_get_stats(struct phy_device *phydev,
550 struct ethtool_stats *stats, u64 *data)
551{
552 if (!phydev->drv)
553 return -EIO;
554
555 mutex_lock(&phydev->lock);
556 phydev->drv->get_stats(phydev, stats, data);
557 mutex_unlock(&phydev->lock);
558
559 return 0;
560}
561EXPORT_SYMBOL(phy_ethtool_get_stats);
562
563/**
564 * phy_start_cable_test - Start a cable test
565 *
566 * @phydev: the phy_device struct
567 * @extack: extack for reporting useful error messages
568 */
569int phy_start_cable_test(struct phy_device *phydev,
570 struct netlink_ext_ack *extack)
571{
572 struct net_device *dev = phydev->attached_dev;
573 int err = -ENOMEM;
574
575 if (!(phydev->drv &&
576 phydev->drv->cable_test_start &&
577 phydev->drv->cable_test_get_status)) {
578 NL_SET_ERR_MSG(extack,
579 "PHY driver does not support cable testing");
580 return -EOPNOTSUPP;
581 }
582
583 mutex_lock(&phydev->lock);
584 if (phydev->state == PHY_CABLETEST) {
585 NL_SET_ERR_MSG(extack,
586 "PHY already performing a test");
587 err = -EBUSY;
588 goto out;
589 }
590
591 if (phydev->state < PHY_UP ||
592 phydev->state > PHY_CABLETEST) {
593 NL_SET_ERR_MSG(extack,
594 "PHY not configured. Try setting interface up");
595 err = -EBUSY;
596 goto out;
597 }
598
599 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
600 if (err)
601 goto out;
602
603 /* Mark the carrier down until the test is complete */
604 phy_link_down(phydev);
605
606 netif_testing_on(dev);
607 err = phydev->drv->cable_test_start(phydev);
608 if (err) {
609 netif_testing_off(dev);
610 phy_link_up(phydev);
611 goto out_free;
612 }
613
614 phydev->state = PHY_CABLETEST;
615
616 if (phy_polling_mode(phydev))
617 phy_trigger_machine(phydev);
618
619 mutex_unlock(&phydev->lock);
620
621 return 0;
622
623out_free:
624 ethnl_cable_test_free(phydev);
625out:
626 mutex_unlock(&phydev->lock);
627
628 return err;
629}
630EXPORT_SYMBOL(phy_start_cable_test);
631
632/**
633 * phy_start_cable_test_tdr - Start a raw TDR cable test
634 *
635 * @phydev: the phy_device struct
636 * @extack: extack for reporting useful error messages
637 * @config: Configuration of the test to run
638 */
639int phy_start_cable_test_tdr(struct phy_device *phydev,
640 struct netlink_ext_ack *extack,
641 const struct phy_tdr_config *config)
642{
643 struct net_device *dev = phydev->attached_dev;
644 int err = -ENOMEM;
645
646 if (!(phydev->drv &&
647 phydev->drv->cable_test_tdr_start &&
648 phydev->drv->cable_test_get_status)) {
649 NL_SET_ERR_MSG(extack,
650 "PHY driver does not support cable test TDR");
651 return -EOPNOTSUPP;
652 }
653
654 mutex_lock(&phydev->lock);
655 if (phydev->state == PHY_CABLETEST) {
656 NL_SET_ERR_MSG(extack,
657 "PHY already performing a test");
658 err = -EBUSY;
659 goto out;
660 }
661
662 if (phydev->state < PHY_UP ||
663 phydev->state > PHY_CABLETEST) {
664 NL_SET_ERR_MSG(extack,
665 "PHY not configured. Try setting interface up");
666 err = -EBUSY;
667 goto out;
668 }
669
670 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
671 if (err)
672 goto out;
673
674 /* Mark the carrier down until the test is complete */
675 phy_link_down(phydev);
676
677 netif_testing_on(dev);
678 err = phydev->drv->cable_test_tdr_start(phydev, config);
679 if (err) {
680 netif_testing_off(dev);
681 phy_link_up(phydev);
682 goto out_free;
683 }
684
685 phydev->state = PHY_CABLETEST;
686
687 if (phy_polling_mode(phydev))
688 phy_trigger_machine(phydev);
689
690 mutex_unlock(&phydev->lock);
691
692 return 0;
693
694out_free:
695 ethnl_cable_test_free(phydev);
696out:
697 mutex_unlock(&phydev->lock);
698
699 return err;
700}
701EXPORT_SYMBOL(phy_start_cable_test_tdr);
702
703int phy_config_aneg(struct phy_device *phydev)
704{
705 if (phydev->drv->config_aneg)
706 return phydev->drv->config_aneg(phydev);
707
708 /* Clause 45 PHYs that don't implement Clause 22 registers are not
709 * allowed to call genphy_config_aneg()
710 */
711 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
712 return genphy_c45_config_aneg(phydev);
713
714 return genphy_config_aneg(phydev);
715}
716EXPORT_SYMBOL(phy_config_aneg);
717
718/**
719 * phy_check_link_status - check link status and set state accordingly
720 * @phydev: the phy_device struct
721 *
722 * Description: Check for link and whether autoneg was triggered / is running
723 * and set state accordingly
724 */
725static int phy_check_link_status(struct phy_device *phydev)
726{
727 int err;
728
729 lockdep_assert_held(&phydev->lock);
730
731 /* Keep previous state if loopback is enabled because some PHYs
732 * report that Link is Down when loopback is enabled.
733 */
734 if (phydev->loopback_enabled)
735 return 0;
736
737 err = phy_read_status(phydev);
738 if (err)
739 return err;
740
741 if (phydev->link && phydev->state != PHY_RUNNING) {
742 phy_check_downshift(phydev);
743 phydev->state = PHY_RUNNING;
744 phy_link_up(phydev);
745 } else if (!phydev->link && phydev->state != PHY_NOLINK) {
746 phydev->state = PHY_NOLINK;
747 phy_link_down(phydev);
748 }
749
750 return 0;
751}
752
753/**
754 * phy_start_aneg - start auto-negotiation for this PHY device
755 * @phydev: the phy_device struct
756 *
757 * Description: Sanitizes the settings (if we're not autonegotiating
758 * them), and then calls the driver's config_aneg function.
759 * If the PHYCONTROL Layer is operating, we change the state to
760 * reflect the beginning of Auto-negotiation or forcing.
761 */
762int phy_start_aneg(struct phy_device *phydev)
763{
764 int err;
765
766 if (!phydev->drv)
767 return -EIO;
768
769 mutex_lock(&phydev->lock);
770
771 if (AUTONEG_DISABLE == phydev->autoneg)
772 phy_sanitize_settings(phydev);
773
774 err = phy_config_aneg(phydev);
775 if (err < 0)
776 goto out_unlock;
777
778 if (phy_is_started(phydev))
779 err = phy_check_link_status(phydev);
780out_unlock:
781 mutex_unlock(&phydev->lock);
782
783 return err;
784}
785EXPORT_SYMBOL(phy_start_aneg);
786
787static int phy_poll_aneg_done(struct phy_device *phydev)
788{
789 unsigned int retries = 100;
790 int ret;
791
792 do {
793 msleep(100);
794 ret = phy_aneg_done(phydev);
795 } while (!ret && --retries);
796
797 if (!ret)
798 return -ETIMEDOUT;
799
800 return ret < 0 ? ret : 0;
801}
802
803/**
804 * phy_speed_down - set speed to lowest speed supported by both link partners
805 * @phydev: the phy_device struct
806 * @sync: perform action synchronously
807 *
808 * Description: Typically used to save energy when waiting for a WoL packet
809 *
810 * WARNING: Setting sync to false may cause the system being unable to suspend
811 * in case the PHY generates an interrupt when finishing the autonegotiation.
812 * This interrupt may wake up the system immediately after suspend.
813 * Therefore use sync = false only if you're sure it's safe with the respective
814 * network chip.
815 */
816int phy_speed_down(struct phy_device *phydev, bool sync)
817{
818 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
819 int ret;
820
821 if (phydev->autoneg != AUTONEG_ENABLE)
822 return 0;
823
824 linkmode_copy(adv_tmp, phydev->advertising);
825
826 ret = phy_speed_down_core(phydev);
827 if (ret)
828 return ret;
829
830 linkmode_copy(phydev->adv_old, adv_tmp);
831
832 if (linkmode_equal(phydev->advertising, adv_tmp))
833 return 0;
834
835 ret = phy_config_aneg(phydev);
836 if (ret)
837 return ret;
838
839 return sync ? phy_poll_aneg_done(phydev) : 0;
840}
841EXPORT_SYMBOL_GPL(phy_speed_down);
842
843/**
844 * phy_speed_up - (re)set advertised speeds to all supported speeds
845 * @phydev: the phy_device struct
846 *
847 * Description: Used to revert the effect of phy_speed_down
848 */
849int phy_speed_up(struct phy_device *phydev)
850{
851 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
852
853 if (phydev->autoneg != AUTONEG_ENABLE)
854 return 0;
855
856 if (linkmode_empty(phydev->adv_old))
857 return 0;
858
859 linkmode_copy(adv_tmp, phydev->advertising);
860 linkmode_copy(phydev->advertising, phydev->adv_old);
861 linkmode_zero(phydev->adv_old);
862
863 if (linkmode_equal(phydev->advertising, adv_tmp))
864 return 0;
865
866 return phy_config_aneg(phydev);
867}
868EXPORT_SYMBOL_GPL(phy_speed_up);
869
870/**
871 * phy_start_machine - start PHY state machine tracking
872 * @phydev: the phy_device struct
873 *
874 * Description: The PHY infrastructure can run a state machine
875 * which tracks whether the PHY is starting up, negotiating,
876 * etc. This function starts the delayed workqueue which tracks
877 * the state of the PHY. If you want to maintain your own state machine,
878 * do not call this function.
879 */
880void phy_start_machine(struct phy_device *phydev)
881{
882 phy_trigger_machine(phydev);
883}
884EXPORT_SYMBOL_GPL(phy_start_machine);
885
886/**
887 * phy_stop_machine - stop the PHY state machine tracking
888 * @phydev: target phy_device struct
889 *
890 * Description: Stops the state machine delayed workqueue, sets the
891 * state to UP (unless it wasn't up yet). This function must be
892 * called BEFORE phy_detach.
893 */
894void phy_stop_machine(struct phy_device *phydev)
895{
896 cancel_delayed_work_sync(&phydev->state_queue);
897
898 mutex_lock(&phydev->lock);
899 if (phy_is_started(phydev))
900 phydev->state = PHY_UP;
901 mutex_unlock(&phydev->lock);
902}
903
904/**
905 * phy_error - enter HALTED state for this PHY device
906 * @phydev: target phy_device struct
907 *
908 * Moves the PHY to the HALTED state in response to a read
909 * or write error, and tells the controller the link is down.
910 * Must not be called from interrupt context, or while the
911 * phydev->lock is held.
912 */
913void phy_error(struct phy_device *phydev)
914{
915 WARN_ON(1);
916
917 mutex_lock(&phydev->lock);
918 phydev->state = PHY_HALTED;
919 mutex_unlock(&phydev->lock);
920
921 phy_trigger_machine(phydev);
922}
923EXPORT_SYMBOL(phy_error);
924
925/**
926 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
927 * @phydev: target phy_device struct
928 */
929int phy_disable_interrupts(struct phy_device *phydev)
930{
931 /* Disable PHY interrupts */
932 return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
933}
934
935/**
936 * phy_interrupt - PHY interrupt handler
937 * @irq: interrupt line
938 * @phy_dat: phy_device pointer
939 *
940 * Description: Handle PHY interrupt
941 */
942static irqreturn_t phy_interrupt(int irq, void *phy_dat)
943{
944 struct phy_device *phydev = phy_dat;
945 struct phy_driver *drv = phydev->drv;
946
947 return drv->handle_interrupt(phydev);
948}
949
950/**
951 * phy_enable_interrupts - Enable the interrupts from the PHY side
952 * @phydev: target phy_device struct
953 */
954static int phy_enable_interrupts(struct phy_device *phydev)
955{
956 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
957}
958
959/**
960 * phy_request_interrupt - request and enable interrupt for a PHY device
961 * @phydev: target phy_device struct
962 *
963 * Description: Request and enable the interrupt for the given PHY.
964 * If this fails, then we set irq to PHY_POLL.
965 * This should only be called with a valid IRQ number.
966 */
967void phy_request_interrupt(struct phy_device *phydev)
968{
969 int err;
970
971 err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
972 IRQF_ONESHOT | IRQF_SHARED,
973 phydev_name(phydev), phydev);
974 if (err) {
975 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
976 err, phydev->irq);
977 phydev->irq = PHY_POLL;
978 } else {
979 if (phy_enable_interrupts(phydev)) {
980 phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
981 phy_free_interrupt(phydev);
982 phydev->irq = PHY_POLL;
983 }
984 }
985}
986EXPORT_SYMBOL(phy_request_interrupt);
987
988/**
989 * phy_free_interrupt - disable and free interrupt for a PHY device
990 * @phydev: target phy_device struct
991 *
992 * Description: Disable and free the interrupt for the given PHY.
993 * This should only be called with a valid IRQ number.
994 */
995void phy_free_interrupt(struct phy_device *phydev)
996{
997 phy_disable_interrupts(phydev);
998 free_irq(phydev->irq, phydev);
999}
1000EXPORT_SYMBOL(phy_free_interrupt);
1001
1002/**
1003 * phy_stop - Bring down the PHY link, and stop checking the status
1004 * @phydev: target phy_device struct
1005 */
1006void phy_stop(struct phy_device *phydev)
1007{
1008 struct net_device *dev = phydev->attached_dev;
1009
1010 if (!phy_is_started(phydev) && phydev->state != PHY_DOWN) {
1011 WARN(1, "called from state %s\n",
1012 phy_state_to_str(phydev->state));
1013 return;
1014 }
1015
1016 mutex_lock(&phydev->lock);
1017
1018 if (phydev->state == PHY_CABLETEST) {
1019 phy_abort_cable_test(phydev);
1020 netif_testing_off(dev);
1021 }
1022
1023 if (phydev->sfp_bus)
1024 sfp_upstream_stop(phydev->sfp_bus);
1025
1026 phydev->state = PHY_HALTED;
1027
1028 mutex_unlock(&phydev->lock);
1029
1030 phy_state_machine(&phydev->state_queue.work);
1031 phy_stop_machine(phydev);
1032
1033 /* Cannot call flush_scheduled_work() here as desired because
1034 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
1035 * will not reenable interrupts.
1036 */
1037}
1038EXPORT_SYMBOL(phy_stop);
1039
1040/**
1041 * phy_start - start or restart a PHY device
1042 * @phydev: target phy_device struct
1043 *
1044 * Description: Indicates the attached device's readiness to
1045 * handle PHY-related work. Used during startup to start the
1046 * PHY, and after a call to phy_stop() to resume operation.
1047 * Also used to indicate the MDIO bus has cleared an error
1048 * condition.
1049 */
1050void phy_start(struct phy_device *phydev)
1051{
1052 mutex_lock(&phydev->lock);
1053
1054 if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
1055 WARN(1, "called from state %s\n",
1056 phy_state_to_str(phydev->state));
1057 goto out;
1058 }
1059
1060 if (phydev->sfp_bus)
1061 sfp_upstream_start(phydev->sfp_bus);
1062
1063 /* if phy was suspended, bring the physical link up again */
1064 __phy_resume(phydev);
1065
1066 phydev->state = PHY_UP;
1067
1068 phy_start_machine(phydev);
1069out:
1070 mutex_unlock(&phydev->lock);
1071}
1072EXPORT_SYMBOL(phy_start);
1073
1074/**
1075 * phy_state_machine - Handle the state machine
1076 * @work: work_struct that describes the work to be done
1077 */
1078void phy_state_machine(struct work_struct *work)
1079{
1080 struct delayed_work *dwork = to_delayed_work(work);
1081 struct phy_device *phydev =
1082 container_of(dwork, struct phy_device, state_queue);
1083 struct net_device *dev = phydev->attached_dev;
1084 bool needs_aneg = false, do_suspend = false;
1085 enum phy_state old_state;
1086 bool finished = false;
1087 int err = 0;
1088
1089 mutex_lock(&phydev->lock);
1090
1091 old_state = phydev->state;
1092
1093 switch (phydev->state) {
1094 case PHY_DOWN:
1095 case PHY_READY:
1096 break;
1097 case PHY_UP:
1098 needs_aneg = true;
1099
1100 break;
1101 case PHY_NOLINK:
1102 case PHY_RUNNING:
1103 err = phy_check_link_status(phydev);
1104 break;
1105 case PHY_CABLETEST:
1106 err = phydev->drv->cable_test_get_status(phydev, &finished);
1107 if (err) {
1108 phy_abort_cable_test(phydev);
1109 netif_testing_off(dev);
1110 needs_aneg = true;
1111 phydev->state = PHY_UP;
1112 break;
1113 }
1114
1115 if (finished) {
1116 ethnl_cable_test_finished(phydev);
1117 netif_testing_off(dev);
1118 needs_aneg = true;
1119 phydev->state = PHY_UP;
1120 }
1121 break;
1122 case PHY_HALTED:
1123 if (phydev->link) {
1124 phydev->link = 0;
1125 phy_link_down(phydev);
1126 }
1127 do_suspend = true;
1128 break;
1129 }
1130
1131 mutex_unlock(&phydev->lock);
1132
1133 if (needs_aneg)
1134 err = phy_start_aneg(phydev);
1135 else if (do_suspend)
1136 phy_suspend(phydev);
1137
1138 if (err == -ENODEV)
1139 return;
1140
1141 if (err < 0)
1142 phy_error(phydev);
1143
1144 if (old_state != phydev->state) {
1145 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1146 phy_state_to_str(old_state),
1147 phy_state_to_str(phydev->state));
1148 if (phydev->drv && phydev->drv->link_change_notify)
1149 phydev->drv->link_change_notify(phydev);
1150 }
1151
1152 /* Only re-schedule a PHY state machine change if we are polling the
1153 * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving
1154 * between states from phy_mac_interrupt().
1155 *
1156 * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1157 * state machine would be pointless and possibly error prone when
1158 * called from phy_disconnect() synchronously.
1159 */
1160 mutex_lock(&phydev->lock);
1161 if (phy_polling_mode(phydev) && phy_is_started(phydev))
1162 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1163 mutex_unlock(&phydev->lock);
1164}
1165
1166/**
1167 * phy_mac_interrupt - MAC says the link has changed
1168 * @phydev: phy_device struct with changed link
1169 *
1170 * The MAC layer is able to indicate there has been a change in the PHY link
1171 * status. Trigger the state machine and work a work queue.
1172 */
1173void phy_mac_interrupt(struct phy_device *phydev)
1174{
1175 /* Trigger a state machine change */
1176 phy_trigger_machine(phydev);
1177}
1178EXPORT_SYMBOL(phy_mac_interrupt);
1179
1180static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
1181{
1182 linkmode_zero(advertising);
1183
1184 if (eee_adv & MDIO_EEE_100TX)
1185 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
1186 advertising);
1187 if (eee_adv & MDIO_EEE_1000T)
1188 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
1189 advertising);
1190 if (eee_adv & MDIO_EEE_10GT)
1191 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
1192 advertising);
1193 if (eee_adv & MDIO_EEE_1000KX)
1194 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
1195 advertising);
1196 if (eee_adv & MDIO_EEE_10GKX4)
1197 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
1198 advertising);
1199 if (eee_adv & MDIO_EEE_10GKR)
1200 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
1201 advertising);
1202}
1203
1204/**
1205 * phy_init_eee - init and check the EEE feature
1206 * @phydev: target phy_device struct
1207 * @clk_stop_enable: PHY may stop the clock during LPI
1208 *
1209 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1210 * is supported by looking at the MMD registers 3.20 and 7.60/61
1211 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1212 * bit if required.
1213 */
1214int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1215{
1216 if (!phydev->drv)
1217 return -EIO;
1218
1219 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1220 */
1221 if (phydev->duplex == DUPLEX_FULL) {
1222 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1223 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1224 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1225 int eee_lp, eee_cap, eee_adv;
1226 int status;
1227 u32 cap;
1228
1229 /* Read phy status to properly get the right settings */
1230 status = phy_read_status(phydev);
1231 if (status)
1232 return status;
1233
1234 /* First check if the EEE ability is supported */
1235 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1236 if (eee_cap <= 0)
1237 goto eee_exit_err;
1238
1239 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1240 if (!cap)
1241 goto eee_exit_err;
1242
1243 /* Check which link settings negotiated and verify it in
1244 * the EEE advertising registers.
1245 */
1246 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1247 if (eee_lp <= 0)
1248 goto eee_exit_err;
1249
1250 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1251 if (eee_adv <= 0)
1252 goto eee_exit_err;
1253
1254 mmd_eee_adv_to_linkmode(adv, eee_adv);
1255 mmd_eee_adv_to_linkmode(lp, eee_lp);
1256 linkmode_and(common, adv, lp);
1257
1258 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1259 goto eee_exit_err;
1260
1261 if (clk_stop_enable)
1262 /* Configure the PHY to stop receiving xMII
1263 * clock while it is signaling LPI.
1264 */
1265 phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1266 MDIO_PCS_CTRL1_CLKSTOP_EN);
1267
1268 return 0; /* EEE supported */
1269 }
1270eee_exit_err:
1271 return -EPROTONOSUPPORT;
1272}
1273EXPORT_SYMBOL(phy_init_eee);
1274
1275/**
1276 * phy_get_eee_err - report the EEE wake error count
1277 * @phydev: target phy_device struct
1278 *
1279 * Description: it is to report the number of time where the PHY
1280 * failed to complete its normal wake sequence.
1281 */
1282int phy_get_eee_err(struct phy_device *phydev)
1283{
1284 if (!phydev->drv)
1285 return -EIO;
1286
1287 return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1288}
1289EXPORT_SYMBOL(phy_get_eee_err);
1290
1291/**
1292 * phy_ethtool_get_eee - get EEE supported and status
1293 * @phydev: target phy_device struct
1294 * @data: ethtool_eee data
1295 *
1296 * Description: it reportes the Supported/Advertisement/LP Advertisement
1297 * capabilities.
1298 */
1299int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1300{
1301 int val;
1302
1303 if (!phydev->drv)
1304 return -EIO;
1305
1306 /* Get Supported EEE */
1307 val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1308 if (val < 0)
1309 return val;
1310 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1311
1312 /* Get advertisement EEE */
1313 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1314 if (val < 0)
1315 return val;
1316 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1317 data->eee_enabled = !!data->advertised;
1318
1319 /* Get LP advertisement EEE */
1320 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1321 if (val < 0)
1322 return val;
1323 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1324
1325 data->eee_active = !!(data->advertised & data->lp_advertised);
1326
1327 return 0;
1328}
1329EXPORT_SYMBOL(phy_ethtool_get_eee);
1330
1331/**
1332 * phy_ethtool_set_eee - set EEE supported and status
1333 * @phydev: target phy_device struct
1334 * @data: ethtool_eee data
1335 *
1336 * Description: it is to program the Advertisement EEE register.
1337 */
1338int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1339{
1340 int cap, old_adv, adv = 0, ret;
1341
1342 if (!phydev->drv)
1343 return -EIO;
1344
1345 /* Get Supported EEE */
1346 cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1347 if (cap < 0)
1348 return cap;
1349
1350 old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1351 if (old_adv < 0)
1352 return old_adv;
1353
1354 if (data->eee_enabled) {
1355 adv = !data->advertised ? cap :
1356 ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1357 /* Mask prohibited EEE modes */
1358 adv &= ~phydev->eee_broken_modes;
1359 }
1360
1361 if (old_adv != adv) {
1362 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1363 if (ret < 0)
1364 return ret;
1365
1366 /* Restart autonegotiation so the new modes get sent to the
1367 * link partner.
1368 */
1369 if (phydev->autoneg == AUTONEG_ENABLE) {
1370 ret = phy_restart_aneg(phydev);
1371 if (ret < 0)
1372 return ret;
1373 }
1374 }
1375
1376 return 0;
1377}
1378EXPORT_SYMBOL(phy_ethtool_set_eee);
1379
1380/**
1381 * phy_ethtool_set_wol - Configure Wake On LAN
1382 *
1383 * @phydev: target phy_device struct
1384 * @wol: Configuration requested
1385 */
1386int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1387{
1388 if (phydev->drv && phydev->drv->set_wol)
1389 return phydev->drv->set_wol(phydev, wol);
1390
1391 return -EOPNOTSUPP;
1392}
1393EXPORT_SYMBOL(phy_ethtool_set_wol);
1394
1395/**
1396 * phy_ethtool_get_wol - Get the current Wake On LAN configuration
1397 *
1398 * @phydev: target phy_device struct
1399 * @wol: Store the current configuration here
1400 */
1401void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1402{
1403 if (phydev->drv && phydev->drv->get_wol)
1404 phydev->drv->get_wol(phydev, wol);
1405}
1406EXPORT_SYMBOL(phy_ethtool_get_wol);
1407
1408int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1409 struct ethtool_link_ksettings *cmd)
1410{
1411 struct phy_device *phydev = ndev->phydev;
1412
1413 if (!phydev)
1414 return -ENODEV;
1415
1416 phy_ethtool_ksettings_get(phydev, cmd);
1417
1418 return 0;
1419}
1420EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1421
1422int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1423 const struct ethtool_link_ksettings *cmd)
1424{
1425 struct phy_device *phydev = ndev->phydev;
1426
1427 if (!phydev)
1428 return -ENODEV;
1429
1430 return phy_ethtool_ksettings_set(phydev, cmd);
1431}
1432EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1433
1434/**
1435 * phy_ethtool_nway_reset - Restart auto negotiation
1436 * @ndev: Network device to restart autoneg for
1437 */
1438int phy_ethtool_nway_reset(struct net_device *ndev)
1439{
1440 struct phy_device *phydev = ndev->phydev;
1441
1442 if (!phydev)
1443 return -ENODEV;
1444
1445 if (!phydev->drv)
1446 return -EIO;
1447
1448 return phy_restart_aneg(phydev);
1449}
1450EXPORT_SYMBOL(phy_ethtool_nway_reset);