[PATCH net-next 2/3] net: phy: broadcom: Add support for WAKE_FILTER

[Florian Fainelli <florian.fainelli@broadcom.com>]

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Since the PHY is capable of matching any arbitrary Ethernet MAC
destination as a programmable wake-up pattern, add support for doing
that using the WAKE_FILTER and ethtool::rxnfc API. For instance, in
order to wake-up from the Ethernet MAC address corresponding to the IPv4
multicast IP address of 224.0.0.1, one could do:

ethtool -N eth0 flow-type ether dst 01:00:5e:00:00:fb loc 0 action -2
ethtool -n eth0
Total 1 rules

Filter: 0
        Flow Type: Raw Ethernet
        Src MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF
        Dest MAC addr: 01:00:5E:00:00:FB mask: 00:00:00:00:00:00
        Ethertype: 0x0 mask: 0xFFFF
        Action: Wake-on-LAN
ethtool -s eth0 wol f

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
 drivers/net/phy/bcm-phy-lib.c | 147 +++++++++++++++++++++++++++++++++-
 drivers/net/phy/bcm-phy-lib.h |   6 ++
 drivers/net/phy/broadcom.c    |  15 ++++
 3 files changed, 167 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/bcm-phy-lib.c b/drivers/net/phy/bcm-phy-lib.c
index 5603d0a9ce96..546c21ce9775 100644
--- a/drivers/net/phy/bcm-phy-lib.c
+++ b/drivers/net/phy/bcm-phy-lib.c
@@ -822,7 +822,8 @@ EXPORT_SYMBOL_GPL(bcm_phy_cable_test_get_status_rdb);
 					 WAKE_MCAST | \
 					 WAKE_BCAST | \
 					 WAKE_MAGIC | \
-					 WAKE_MAGICSECURE)
+					 WAKE_MAGICSECURE | \
+					 WAKE_FILTER)
 
 int bcm_phy_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
 {
@@ -876,6 +877,12 @@ int bcm_phy_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
 	ctl &= ~BCM54XX_WOL_DIR_PKT_EN;
 	ctl &= ~(BCM54XX_WOL_SECKEY_OPT_MASK << BCM54XX_WOL_SECKEY_OPT_SHIFT);
 
+	/* For WAKE_FILTER, we have already programmed the desired MAC DA
+	 * and associated mask by the time we get there.
+	 */
+	if (wol->wolopts & WAKE_FILTER)
+		goto program_ctl;
+
 	/* When using WAKE_MAGIC, we program the magic pattern filter to match
 	 * the device's MAC address and we accept any MAC DA in the Ethernet
 	 * frame.
@@ -930,6 +937,7 @@ int bcm_phy_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
 			return ret;
 	}
 
+program_ctl:
 	if (wol->wolopts & WAKE_MAGICSECURE) {
 		ctl |= BCM54XX_WOL_SECKEY_OPT_6B <<
 		       BCM54XX_WOL_SECKEY_OPT_SHIFT;
@@ -1034,6 +1042,143 @@ irqreturn_t bcm_phy_wol_isr(int irq, void *dev_id)
 }
 EXPORT_SYMBOL_GPL(bcm_phy_wol_isr);
 
+static int bcm_phy_get_rule(struct phy_device *phydev,
+			    struct ethtool_rxnfc *nfc,
+			    int loc)
+{
+	u8 da[ETH_ALEN];
+	unsigned int i;
+	int ret;
+
+	if (loc != 0)
+		return -EINVAL;
+
+	memset(nfc, 0, sizeof(*nfc));
+	nfc->flow_type = ETHER_FLOW;
+	nfc->fs.flow_type = ETHER_FLOW;
+
+	for (i = 0; i < sizeof(da) / 2; i++) {
+		ret = bcm_phy_read_exp(phydev,
+				       BCM54XX_WOL_MPD_DATA2(2 - i));
+		if (ret < 0)
+			return ret;
+
+		da[i * 2] = ret >> 8;
+		da[i * 2 + 1] = ret & 0xff;
+	}
+	ether_addr_copy(nfc->fs.h_u.ether_spec.h_dest, da);
+
+	for (i = 0; i < sizeof(da) / 2; i++) {
+		ret = bcm_phy_read_exp(phydev,
+				       BCM54XX_WOL_MASK(2 - i));
+		if (ret < 0)
+			return ret;
+
+		da[i * 2] = ret >> 8;
+		da[i * 2 + 1] = ret & 0xff;
+	}
+	ether_addr_copy(nfc->fs.m_u.ether_spec.h_dest, da);
+
+	nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE;
+	nfc->fs.location = 0;
+
+	return 0;
+}
+
+static int bcm_phy_set_rule(struct phy_device *phydev,
+			    struct ethtool_rxnfc *nfc)
+{
+	int ret = -EOPNOTSUPP;
+	unsigned int i;
+	const u8 *da;
+
+	/* We support only matching on the MAC DA, reject anything else */
+	if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE ||
+	    nfc->fs.location != 0 ||
+	    nfc->fs.flow_type != ETHER_FLOW ||
+	    nfc->fs.h_u.ether_spec.h_proto ||
+	    !is_zero_ether_addr(nfc->fs.h_u.ether_spec.h_source) ||
+	    nfc->fs.m_u.ether_spec.h_proto ||
+	    !is_zero_ether_addr(nfc->fs.m_u.ether_spec.h_source))
+		return ret;
+
+	da = nfc->fs.h_u.ether_spec.h_dest;
+	for (i = 0; i < ETH_ALEN / 2; i++) {
+		ret = bcm_phy_write_exp(phydev,
+					BCM54XX_WOL_MPD_DATA2(2 - i),
+					da[i * 2] << 8 | da[i * 2 + 1]);
+		if (ret < 0)
+			return ret;
+	}
+
+	da = nfc->fs.m_u.ether_spec.h_dest;
+	for (i = 0; i < ETH_ALEN / 2; i++) {
+		ret = bcm_phy_write_exp(phydev,
+					BCM54XX_WOL_MASK(2 - i),
+					da[i * 2] << 8 | da[i * 2 + 1]);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+int bcm_phy_get_rxnfc(struct phy_device *phydev,
+		      struct ethtool_rxnfc *cmd, u32 *rule_locs)
+{
+	int err = 0;
+
+	switch (cmd->cmd) {
+	case ETHTOOL_GRXCLSRLCNT:
+		cmd->rule_cnt = 1;
+		cmd->data = 1 | RX_CLS_LOC_SPECIAL;
+		break;
+	case ETHTOOL_GRXCLSRULE:
+		err = bcm_phy_get_rule(phydev, cmd, cmd->fs.location);
+		break;
+	case ETHTOOL_GRXCLSRLALL:
+		rule_locs[0] = 0;
+		cmd->rule_cnt = 1;
+		cmd->data = 1;
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(bcm_phy_get_rxnfc);
+
+int bcm_phy_set_rxnfc(struct phy_device *phydev,
+		      struct ethtool_rxnfc *cmd,
+		      bool *installed)
+{
+	int err = 0;
+
+	switch (cmd->cmd) {
+	case ETHTOOL_SRXCLSRLINS:
+		err = bcm_phy_set_rule(phydev, cmd);
+		if (err)
+			return err;
+
+		*installed = true;
+		break;
+	case ETHTOOL_SRXCLSRLDEL:
+		if (cmd->fs.location != 0)
+			return err;
+
+		*installed = false;
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(bcm_phy_set_rxnfc);
+
 MODULE_DESCRIPTION("Broadcom PHY Library");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Broadcom Corporation");
diff --git a/drivers/net/phy/bcm-phy-lib.h b/drivers/net/phy/bcm-phy-lib.h
index 2f30ce0cab0e..4881ea34e99c 100644
--- a/drivers/net/phy/bcm-phy-lib.h
+++ b/drivers/net/phy/bcm-phy-lib.h
@@ -118,4 +118,10 @@ int bcm_phy_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol);
 void bcm_phy_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol);
 irqreturn_t bcm_phy_wol_isr(int irq, void *dev_id);
 
+int bcm_phy_get_rxnfc(struct phy_device *phydev,
+		      struct ethtool_rxnfc *nfc, u32 *rule_locs);
+int bcm_phy_set_rxnfc(struct phy_device *phydev,
+		      struct ethtool_rxnfc *nfc,
+		      bool *installed);
+
 #endif /* _LINUX_BCM_PHY_LIB_H */
diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c
index 822c8b01dc53..b4a8aba7d5ef 100644
--- a/drivers/net/phy/broadcom.c
+++ b/drivers/net/phy/broadcom.c
@@ -36,6 +36,7 @@ struct bcm54xx_phy_priv {
 	struct bcm_ptp_private *ptp;
 	int	wake_irq;
 	bool	wake_irq_enabled;
+	bool	wake_filter_installed;
 };
 
 static bool bcm54xx_phy_can_wakeup(struct phy_device *phydev)
@@ -860,6 +861,8 @@ static int brcm_fet_suspend(struct phy_device *phydev)
 static void bcm54xx_phy_get_wol(struct phy_device *phydev,
 				struct ethtool_wolinfo *wol)
 {
+	struct bcm54xx_phy_priv *priv = phydev->priv;
+
 	/* We cannot wake-up if we do not have a dedicated PHY interrupt line
 	 * or an out of band GPIO descriptor for wake-up. Zeroing
 	 * wol->supported allows the caller (MAC driver) to play through and
@@ -871,6 +874,8 @@ static void bcm54xx_phy_get_wol(struct phy_device *phydev,
 	}
 
 	bcm_phy_get_wol(phydev, wol);
+	if (priv->wake_filter_installed)
+		wol->wolopts |= WAKE_FILTER;
 }
 
 static int bcm54xx_phy_set_wol(struct phy_device *phydev,
@@ -893,6 +898,14 @@ static int bcm54xx_phy_set_wol(struct phy_device *phydev,
 	return 0;
 }
 
+static int bcm54xx_phy_set_rxnfc(struct phy_device *phydev,
+				 struct ethtool_rxnfc *cmd)
+{
+	struct bcm54xx_phy_priv *priv = phydev->priv;
+
+	return bcm_phy_set_rxnfc(phydev, cmd, &priv->wake_filter_installed);
+}
+
 static int bcm54xx_phy_probe(struct phy_device *phydev)
 {
 	struct bcm54xx_phy_priv *priv;
@@ -1031,6 +1044,8 @@ static struct phy_driver broadcom_drivers[] = {
 	.resume		= bcm54xx_resume,
 	.get_wol	= bcm54xx_phy_get_wol,
 	.set_wol	= bcm54xx_phy_set_wol,
+	.get_rxnfc	= bcm_phy_get_rxnfc,
+	.set_rxnfc	= bcm54xx_phy_set_rxnfc,
 }, {
 	.phy_id		= PHY_ID_BCM5461,
 	.phy_id_mask	= 0xfffffff0,
-- 
2.34.1


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