aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/mvebu/patches-4.4/143-net-mvneta-add-EEE-support.patch
blob: b9043561d0711a4244fa5bcbad826ff0866712e8 (plain)
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
178
179
180
181
182
From b7dacf514e41d6efff0ccc170f660cc6dc2aeae2 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Tue, 29 Sep 2015 15:17:39 +0100
Subject: [PATCH 731/744] net: mvneta: add EEE support

Add EEE support to mvneta.  This allows us to enable the low power idle
support at MAC level if there is a PHY attached through phylink which
supports LPI.  The appropriate ethtool support is provided to allow the
feature to be controlled, including ethtool statistics for EEE wakeup
errors.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/net/ethernet/marvell/mvneta.c | 87 +++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)

--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -243,6 +243,12 @@
 #define MVNETA_TXQ_TOKEN_SIZE_REG(q)             (0x3e40 + ((q) << 2))
 #define      MVNETA_TXQ_TOKEN_SIZE_MAX           0x7fffffff
 
+#define MVNETA_LPI_CTRL_0                        0x2cc0
+#define MVNETA_LPI_CTRL_1                        0x2cc4
+#define      MVNETA_LPI_REQUEST_ENABLE           BIT(0)
+#define MVNETA_LPI_CTRL_2                        0x2cc8
+#define MVNETA_LPI_STATUS                        0x2ccc
+
 #define MVNETA_CAUSE_TXQ_SENT_DESC_ALL_MASK	 0xff
 
 /* Descriptor ring Macros */
@@ -316,6 +322,11 @@
 #define MVNETA_RX_GET_BM_POOL_ID(rxd) \
 	(((rxd)->status & MVNETA_RXD_BM_POOL_MASK) >> MVNETA_RXD_BM_POOL_SHIFT)
 
+enum {
+	ETHTOOL_STAT_EEE_WAKEUP,
+	ETHTOOL_MAX_STATS,
+};
+
 struct mvneta_statistic {
 	unsigned short offset;
 	unsigned short type;
@@ -324,6 +335,7 @@ struct mvneta_statistic {
 
 #define T_REG_32	32
 #define T_REG_64	64
+#define T_SW		1
 
 static const struct mvneta_statistic mvneta_statistics[] = {
 	{ 0x3000, T_REG_64, "good_octets_received", },
@@ -358,6 +370,7 @@ static const struct mvneta_statistic mvn
 	{ 0x304c, T_REG_32, "broadcast_frames_sent", },
 	{ 0x3054, T_REG_32, "fc_sent", },
 	{ 0x300c, T_REG_32, "internal_mac_transmit_err", },
+	{ ETHTOOL_STAT_EEE_WAKEUP, T_SW, "eee_wakeup_errors", },
 };
 
 struct mvneta_pcpu_stats {
@@ -413,6 +426,10 @@ struct mvneta_port {
 	struct mvneta_bm_pool *pool_short;
 	int bm_win_id;
 
+	bool eee_enabled;
+	bool eee_active;
+	bool tx_lpi_enabled;
+
 	u64 ethtool_stats[ARRAY_SIZE(mvneta_statistics)];
 
 	u32 indir[MVNETA_RSS_LU_TABLE_SIZE];
@@ -3276,6 +3293,18 @@ static void mvneta_mac_config(struct net
 		mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, new_an);
 }
 
+static void mvneta_set_eee(struct mvneta_port *pp, bool enable)
+{
+	u32 lpi_ctl1;
+
+	lpi_ctl1 = mvreg_read(pp, MVNETA_LPI_CTRL_1);
+	if (enable)
+		lpi_ctl1 |= MVNETA_LPI_REQUEST_ENABLE;
+	else
+		lpi_ctl1 &= ~MVNETA_LPI_REQUEST_ENABLE;
+	mvreg_write(pp, MVNETA_LPI_CTRL_1, lpi_ctl1);
+}
+
 static void mvneta_mac_link_down(struct net_device *ndev, unsigned int mode)
 {
 	struct mvneta_port *pp = netdev_priv(ndev);
@@ -3289,6 +3318,9 @@ static void mvneta_mac_link_down(struct
 		val |= MVNETA_GMAC_FORCE_LINK_DOWN;
 		mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val);
 	}
+
+	pp->eee_active = false;
+	mvneta_set_eee(pp, false);
 }
 
 static void mvneta_mac_link_up(struct net_device *ndev, unsigned int mode,
@@ -3305,6 +3337,11 @@ static void mvneta_mac_link_up(struct ne
 	}
 
 	mvneta_port_up(pp);
+
+	if (phy && pp->eee_enabled) {
+		pp->eee_active = phy_init_eee(phy, 0) >= 0;
+		mvneta_set_eee(pp, pp->eee_active && pp->tx_lpi_enabled);
+	}
 }
 
 static const struct phylink_mac_ops mvneta_phylink_ops = {
@@ -3744,6 +3781,13 @@ static void mvneta_ethtool_update_stats(
 			val64 = (u64)high << 32 | low;
 			pp->ethtool_stats[i] += val64;
 			break;
+		case T_SW:
+			switch (s->offset) {
+			case ETHTOOL_STAT_EEE_WAKEUP:
+				val = phylink_get_eee_err(pp->phylink);
+				break;
+			}
+			break;
 		}
 	}
 }
@@ -3867,6 +3911,47 @@ static int mvneta_ethtool_get_rxfh(struc
 	return 0;
 }
 
+static int mvneta_ethtool_get_eee(struct net_device *dev,
+				  struct ethtool_eee *eee)
+{
+	struct mvneta_port *pp = netdev_priv(dev);
+	u32 lpi_ctl0;
+
+	lpi_ctl0 = mvreg_read(pp, MVNETA_LPI_CTRL_0);
+
+	eee->eee_enabled = pp->eee_enabled;
+	eee->eee_active = pp->eee_active;
+	eee->tx_lpi_enabled = pp->tx_lpi_enabled;
+	eee->tx_lpi_timer = (lpi_ctl0) >> 8; // * scale;
+
+	return phylink_ethtool_get_eee(pp->phylink, eee);
+}
+
+static int mvneta_ethtool_set_eee(struct net_device *dev,
+				  struct ethtool_eee *eee)
+{
+	struct mvneta_port *pp = netdev_priv(dev);
+	u32 lpi_ctl0;
+
+	/* The Armada 37x documents do not give limits for this other than
+	 * it being an 8-bit register. */
+	if (eee->tx_lpi_enabled &&
+	    (eee->tx_lpi_timer < 0 || eee->tx_lpi_timer > 255))
+		return -EINVAL;
+
+	lpi_ctl0 = mvreg_read(pp, MVNETA_LPI_CTRL_0);
+	lpi_ctl0 &= ~(0xff << 8);
+	lpi_ctl0 |= eee->tx_lpi_timer << 8;
+	mvreg_write(pp, MVNETA_LPI_CTRL_0, lpi_ctl0);
+
+	pp->eee_enabled = eee->eee_enabled;
+	pp->tx_lpi_enabled = eee->tx_lpi_enabled;
+
+	mvneta_set_eee(pp, eee->tx_lpi_enabled && eee->eee_enabled);
+
+	return phylink_ethtool_set_eee(pp->phylink, eee);
+}
+
 static const struct net_device_ops mvneta_netdev_ops = {
 	.ndo_open            = mvneta_open,
 	.ndo_stop            = mvneta_stop,
@@ -3898,6 +3983,8 @@ const struct ethtool_ops mvneta_eth_tool
 	.get_rxnfc	= mvneta_ethtool_get_rxnfc,
 	.get_rxfh	= mvneta_ethtool_get_rxfh,
 	.set_rxfh	= mvneta_ethtool_set_rxfh,
+	.get_eee	= mvneta_ethtool_get_eee,
+	.set_eee	= mvneta_ethtool_set_eee,
 };
 
 /* Initialize hw */