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Message-Id: <20231016141256.2011861-6-o.rempel@pengutronix.de>
Date: Mon, 16 Oct 2023 16:12:52 +0200
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: "David S. Miller" <davem@...emloft.net>,
Andrew Lunn <andrew@...n.ch>,
Eric Dumazet <edumazet@...gle.com>,
Florian Fainelli <f.fainelli@...il.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Vladimir Oltean <olteanv@...il.com>,
Woojung Huh <woojung.huh@...rochip.com>,
Arun Ramadoss <arun.ramadoss@...rochip.com>,
Conor Dooley <conor+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Rob Herring <robh+dt@...nel.org>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>,
kernel@...gutronix.de,
linux-kernel@...r.kernel.org,
netdev@...r.kernel.org,
UNGLinuxDriver@...rochip.com,
"Russell King (Oracle)" <linux@...linux.org.uk>,
devicetree@...r.kernel.org
Subject: [PATCH net-next v4 5/9] net: dsa: microchip: ksz9477: Add Wake on Magic Packet support
Introduce Wake on Magic Packet (WoL) functionality to the ksz9477
driver.
Major changes include:
1. Extending the `ksz9477_handle_wake_reason` function to identify Magic
Packet wake events alongside existing wake reasons.
2. Updating the `ksz9477_get_wol` and `ksz9477_set_wol` functions to
handle WAKE_MAGIC alongside the existing WAKE_PHY option, and to
program the switch's MAC address register accordingly when Magic
Packet wake-up is enabled. This change will prevent WAKE_MAGIC
activation if the related port has a different MAC address compared
to a MAC address already used by HSR or an already active WAKE_MAGIC
on another port.
3. Adding a restriction in `ksz_port_set_mac_address` to prevent MAC
address changes on ports with active Wake on Magic Packet, as the
switch's MAC address register is utilized for this feature.
Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
drivers/net/dsa/microchip/ksz9477.c | 17 ++++++++++++++---
drivers/net/dsa/microchip/ksz_common.c | 13 +++++++++++--
drivers/net/dsa/microchip/ksz_common.h | 2 ++
3 files changed, 27 insertions(+), 5 deletions(-)
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 8b512b55bfe5..1f8b37b510b0 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -81,7 +81,8 @@ static int ksz9477_handle_wake_reason(struct ksz_device *dev, int port)
if (!pme_status)
return 0;
- dev_dbg(dev->dev, "Wake event on port %d due to: %s %s\n", port,
+ dev_dbg(dev->dev, "Wake event on port %d due to: %s %s %s\n", port,
+ pme_status & PME_WOL_MAGICPKT ? "\"Magic Packet\"" : "",
pme_status & PME_WOL_LINKUP ? "\"Link Up\"" : "",
pme_status & PME_WOL_ENERGY ? "\"Enery detect\"" : "");
@@ -111,12 +112,14 @@ void ksz9477_get_wol(struct ksz_device *dev, int port,
if (!(pme_conf & PME_ENABLE))
return;
- wol->supported = WAKE_PHY;
+ wol->supported = WAKE_PHY | WAKE_MAGIC;
ret = ksz_pread8(dev, port, REG_PORT_PME_CTRL, &pme_ctrl);
if (ret)
return;
+ if (pme_ctrl & PME_WOL_MAGICPKT)
+ wol->wolopts |= WAKE_MAGIC;
if (pme_ctrl & (PME_WOL_LINKUP | PME_WOL_ENERGY))
wol->wolopts |= WAKE_PHY;
}
@@ -141,7 +144,7 @@ int ksz9477_set_wol(struct ksz_device *dev, int port,
u8 pme_conf, pme_ctrl = 0;
int ret;
- if (wol->wolopts & ~WAKE_PHY)
+ if (wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
return -EINVAL;
ret = ksz_read8(dev, REG_SW_PME_CTRL, &pme_conf);
@@ -155,6 +158,14 @@ int ksz9477_set_wol(struct ksz_device *dev, int port,
if (ret)
return ret;
+ if (wol->wolopts & WAKE_MAGIC) {
+ ret = ksz_switch_macaddr_get(dev->ds, port, NULL);
+ if (ret)
+ return ret;
+
+ pme_ctrl |= PME_WOL_MAGICPKT;
+ }
+
if (wol->wolopts & WAKE_PHY)
pme_ctrl |= PME_WOL_LINKUP | PME_WOL_ENERGY;
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 3f7c86e545a7..4601aaca5179 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -3569,6 +3569,7 @@ static int ksz_port_set_mac_address(struct dsa_switch *ds, int port,
const unsigned char *addr)
{
struct dsa_port *dp = dsa_to_port(ds, port);
+ struct ethtool_wolinfo wol;
if (dp->hsr_dev) {
dev_err(ds->dev,
@@ -3577,6 +3578,14 @@ static int ksz_port_set_mac_address(struct dsa_switch *ds, int port,
return -EBUSY;
}
+ ksz_get_wol(ds, dp->index, &wol);
+ if (wol.wolopts & WAKE_MAGIC) {
+ dev_err(ds->dev,
+ "Cannot change MAC address on port %d with active Wake on Magic Packet\n",
+ port);
+ return -EBUSY;
+ }
+
return 0;
}
@@ -3587,8 +3596,8 @@ static int ksz_port_set_mac_address(struct dsa_switch *ds, int port,
* the same. The user ports' MAC addresses must not change while they have
* ownership of the switch MAC address.
*/
-static int ksz_switch_macaddr_get(struct dsa_switch *ds, int port,
- struct netlink_ext_ack *extack)
+int ksz_switch_macaddr_get(struct dsa_switch *ds, int port,
+ struct netlink_ext_ack *extack)
{
struct net_device *slave = dsa_to_port(ds, port)->slave;
const unsigned char *addr = slave->dev_addr;
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index a7394175fcf6..2ad49c5f1df4 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -396,6 +396,8 @@ void ksz_port_stp_state_set(struct dsa_switch *ds, int port, u8 state);
bool ksz_get_gbit(struct ksz_device *dev, int port);
phy_interface_t ksz_get_xmii(struct ksz_device *dev, int port, bool gbit);
extern const struct ksz_chip_data ksz_switch_chips[];
+int ksz_switch_macaddr_get(struct dsa_switch *ds, int port,
+ struct netlink_ext_ack *extack);
/* Common register access functions */
static inline struct regmap *ksz_regmap_8(struct ksz_device *dev)
--
2.39.2
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