1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sun, 12 Feb 2017 17:27:17 +0100
Subject: [PATCH] phy: provide a hook for link up/link down events
Sometimes, we need to do additional work between the PHY coming up and
marking the carrier present - for example, we may need to wait for the
PHY to MAC link to finish negotiation. This changes phylib to provide
a notification function pointer which avoids the built-in
netif_carrier_on() and netif_carrier_off() functions.
Standard ->adjust_link functionality is provided by hooking a helper
into the new ->phy_link_change method.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -991,6 +991,16 @@ void phy_start(struct phy_device *phydev
}
EXPORT_SYMBOL(phy_start);
+static void phy_link_up(struct phy_device *phydev)
+{
+ phydev->phy_link_change(phydev, true, true);
+}
+
+static void phy_link_down(struct phy_device *phydev, bool do_carrier)
+{
+ phydev->phy_link_change(phydev, false, do_carrier);
+}
+
/**
* phy_state_machine - Handle the state machine
* @work: work_struct that describes the work to be done
@@ -1032,8 +1042,7 @@ void phy_state_machine(struct work_struc
/* If the link is down, give up on negotiation for now */
if (!phydev->link) {
phydev->state = PHY_NOLINK;
- netif_carrier_off(phydev->attached_dev);
- phydev->adjust_link(phydev->attached_dev);
+ phy_link_down(phydev, true);
break;
}
@@ -1045,9 +1054,7 @@ void phy_state_machine(struct work_struc
/* If AN is done, we're running */
if (err > 0) {
phydev->state = PHY_RUNNING;
- netif_carrier_on(phydev->attached_dev);
- phydev->adjust_link(phydev->attached_dev);
-
+ phy_link_up(phydev);
} else if (0 == phydev->link_timeout--)
needs_aneg = true;
break;
@@ -1072,8 +1079,7 @@ void phy_state_machine(struct work_struc
}
}
phydev->state = PHY_RUNNING;
- netif_carrier_on(phydev->attached_dev);
- phydev->adjust_link(phydev->attached_dev);
+ phy_link_up(phydev);
}
break;
case PHY_FORCING:
@@ -1083,13 +1089,12 @@ void phy_state_machine(struct work_struc
if (phydev->link) {
phydev->state = PHY_RUNNING;
- netif_carrier_on(phydev->attached_dev);
+ phy_link_up(phydev);
} else {
if (0 == phydev->link_timeout--)
needs_aneg = true;
+ phy_link_down(phydev, false);
}
-
- phydev->adjust_link(phydev->attached_dev);
break;
case PHY_RUNNING:
/* Only register a CHANGE if we are polling and link changed
@@ -1121,14 +1126,12 @@ void phy_state_machine(struct work_struc
if (phydev->link) {
phydev->state = PHY_RUNNING;
- netif_carrier_on(phydev->attached_dev);
+ phy_link_up(phydev);
} else {
phydev->state = PHY_NOLINK;
- netif_carrier_off(phydev->attached_dev);
+ phy_link_down(phydev, true);
}
- phydev->adjust_link(phydev->attached_dev);
-
if (phy_interrupt_is_valid(phydev))
err = phy_config_interrupt(phydev,
PHY_INTERRUPT_ENABLED);
@@ -1136,8 +1139,7 @@ void phy_state_machine(struct work_struc
case PHY_HALTED:
if (phydev->link) {
phydev->link = 0;
- netif_carrier_off(phydev->attached_dev);
- phydev->adjust_link(phydev->attached_dev);
+ phy_link_down(phydev, true);
do_suspend = true;
}
break;
@@ -1157,11 +1159,11 @@ void phy_state_machine(struct work_struc
if (phydev->link) {
phydev->state = PHY_RUNNING;
- netif_carrier_on(phydev->attached_dev);
+ phy_link_up(phydev);
} else {
phydev->state = PHY_NOLINK;
+ phy_link_down(phydev, false);
}
- phydev->adjust_link(phydev->attached_dev);
} else {
phydev->state = PHY_AN;
phydev->link_timeout = PHY_AN_TIMEOUT;
@@ -1173,11 +1175,11 @@ void phy_state_machine(struct work_struc
if (phydev->link) {
phydev->state = PHY_RUNNING;
- netif_carrier_on(phydev->attached_dev);
+ phy_link_up(phydev);
} else {
phydev->state = PHY_NOLINK;
+ phy_link_down(phydev, false);
}
- phydev->adjust_link(phydev->attached_dev);
}
break;
}
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -645,6 +645,19 @@ struct phy_device *phy_find_first(struct
}
EXPORT_SYMBOL(phy_find_first);
+static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier)
+{
+ struct net_device *netdev = phydev->attached_dev;
+
+ if (do_carrier) {
+ if (up)
+ netif_carrier_on(netdev);
+ else
+ netif_carrier_off(netdev);
+ }
+ phydev->adjust_link(netdev);
+}
+
/**
* phy_prepare_link - prepares the PHY layer to monitor link status
* @phydev: target phy_device struct
@@ -910,6 +923,7 @@ int phy_attach_direct(struct net_device
goto error;
}
+ phydev->phy_link_change = phy_link_change;
phydev->attached_dev = dev;
dev->phydev = phydev;
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -429,6 +429,7 @@ struct phy_device {
u8 mdix;
+ void (*phy_link_change)(struct phy_device *, bool up, bool do_carrier);
void (*adjust_link)(struct net_device *dev);
};
#define to_phy_device(d) container_of(to_mdio_device(d), \
|
