From 5f18426928800c59fb0f9bc8fb0c182bb6f5ee24 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 13 Sep 2023 21:49:39 +0100 Subject: netdev: expose DPLL pin handle for netdevice In case netdevice represents a SyncE port, the user needs to understand the connection between netdevice and associated DPLL pin. There might me multiple netdevices pointing to the same pin, in case of VF/SF implementation. Add a IFLA Netlink attribute to nest the DPLL pin handle, similar to how it is implemented for devlink port. Add a struct dpll_pin pointer to netdev and protect access to it by RTNL. Expose netdev_dpll_pin_set() and netdev_dpll_pin_clear() helpers to the drivers so they can set/clear the DPLL pin relationship to netdev. Note that during the lifetime of struct dpll_pin the pin handle does not change. Therefore it is save to access it lockless. It is drivers responsibility to call netdev_dpll_pin_clear() before dpll_pin_put(). Signed-off-by: Jiri Pirko Signed-off-by: Arkadiusz Kubalewski Signed-off-by: Vadim Fedorenko Signed-off-by: David S. Miller --- drivers/dpll/dpll_netlink.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'drivers/dpll') diff --git a/drivers/dpll/dpll_netlink.c b/drivers/dpll/dpll_netlink.c index 9464a6865977..764437a0661b 100644 --- a/drivers/dpll/dpll_netlink.c +++ b/drivers/dpll/dpll_netlink.c @@ -47,6 +47,18 @@ dpll_msg_add_dev_parent_handle(struct sk_buff *msg, u32 id) return 0; } +/** + * dpll_msg_pin_handle_size - get size of pin handle attribute for given pin + * @pin: pin pointer + * + * Return: byte size of pin handle attribute for given pin. + */ +size_t dpll_msg_pin_handle_size(struct dpll_pin *pin) +{ + return pin ? nla_total_size(4) : 0; /* DPLL_A_PIN_ID */ +} +EXPORT_SYMBOL_GPL(dpll_msg_pin_handle_size); + /** * dpll_msg_add_pin_handle - attach pin handle attribute to a given message * @msg: pointer to sk_buff message to attach a pin handle @@ -56,8 +68,7 @@ dpll_msg_add_dev_parent_handle(struct sk_buff *msg, u32 id) * * 0 - success * * -EMSGSIZE - no space in message to attach pin handle */ -static int -dpll_msg_add_pin_handle(struct sk_buff *msg, struct dpll_pin *pin) +int dpll_msg_add_pin_handle(struct sk_buff *msg, struct dpll_pin *pin) { if (!pin) return 0; @@ -65,6 +76,7 @@ dpll_msg_add_pin_handle(struct sk_buff *msg, struct dpll_pin *pin) return -EMSGSIZE; return 0; } +EXPORT_SYMBOL_GPL(dpll_msg_add_pin_handle); static int dpll_msg_add_mode(struct sk_buff *msg, struct dpll_device *dpll, -- cgit v1.2.3-58-ga151