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Message-Id: <20230829121132.414335-5-lukma@denx.de>
Date: Tue, 29 Aug 2023 14:11:32 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Tristram.Ha@...rochip.com, Eric Dumazet <edumazet@...gle.com>,
davem@...emloft.net, Woojung Huh <woojung.huh@...rochip.com>,
Vladimir Oltean <olteanv@...il.com>
Cc: Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, UNGLinuxDriver@...rochip.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
Lukasz Majewski <lukma@...x.de>
Subject: [PATCH 4/4] net: dsa: hsr: Provide generic HSR ksz_hsr_{join|leave} functions
This patch provides the common KSZ (i.e. Microchip) DSA code with support
for HSR aware devices.
To be more specific - generic ksz_hsr_{join|leave} functions are provided,
now only supporting KSZ9477 IC.
Signed-off-by: Lukasz Majewski <lukma@...x.de>
---
drivers/net/dsa/microchip/ksz_common.c | 69 ++++++++++++++++++++++++++
1 file changed, 69 insertions(+)
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 6c0623f88654..d53ca28583cb 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -16,6 +16,7 @@
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
#include <linux/if_vlan.h>
+#include <linux/if_hsr.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/of_mdio.h>
@@ -3407,6 +3408,72 @@ static int ksz_setup_tc(struct dsa_switch *ds, int port,
}
}
+static int ksz_hsr_join(struct dsa_switch *ds, int port, struct net_device *hsr)
+{
+ struct dsa_port *partner = NULL, *dp;
+ struct ksz_device *dev = ds->priv;
+ enum hsr_version ver;
+ int ret;
+
+ ret = hsr_get_version(hsr, &ver);
+ if (ret)
+ return ret;
+
+ switch (dev->chip_id) {
+ case KSZ9477_CHIP_ID:
+ if (ver == PRP_V1)
+ return -EOPNOTSUPP;
+ }
+
+ /* We can't enable redundancy on the switch until both
+ * redundant ports have signed up.
+ */
+ dsa_hsr_foreach_port(dp, ds, hsr) {
+ if (dp->index != port) {
+ partner = dp;
+ break;
+ }
+ }
+
+ if (!partner)
+ return 0;
+
+ switch (dev->chip_id) {
+ case KSZ9477_CHIP_ID:
+ return ksz9477_hsr_join(ds, port, hsr, partner);
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int ksz_hsr_leave(struct dsa_switch *ds, int port,
+ struct net_device *hsr)
+{
+ struct dsa_port *partner = NULL, *dp;
+ struct ksz_device *dev = ds->priv;
+
+ dsa_hsr_foreach_port(dp, ds, hsr) {
+ if (dp->index != port) {
+ partner = dp;
+ break;
+ }
+ }
+
+ if (!partner)
+ return 0;
+
+ switch (dev->chip_id) {
+ case KSZ9477_CHIP_ID:
+ return ksz9477_hsr_leave(ds, port, hsr, partner);
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
static const struct dsa_switch_ops ksz_switch_ops = {
.get_tag_protocol = ksz_get_tag_protocol,
.connect_tag_protocol = ksz_connect_tag_protocol,
@@ -3426,6 +3493,8 @@ static const struct dsa_switch_ops ksz_switch_ops = {
.get_sset_count = ksz_sset_count,
.port_bridge_join = ksz_port_bridge_join,
.port_bridge_leave = ksz_port_bridge_leave,
+ .port_hsr_join = ksz_hsr_join,
+ .port_hsr_leave = ksz_hsr_leave,
.port_stp_state_set = ksz_port_stp_state_set,
.port_pre_bridge_flags = ksz_port_pre_bridge_flags,
.port_bridge_flags = ksz_port_bridge_flags,
--
2.20.1
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