diff options
| author | Jiri Pirko <jiri@nvidia.com> | 2023-09-13 22:49:39 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-09-17 12:50:20 +0200 |
| commit | 5f18426928800c59fb0f9bc8fb0c182bb6f5ee24 (patch) | |
| tree | 686549a480eaf87f4eae934ca2a2890163bd9cf4 /drivers/dpll | |
| parent | dpll: netlink: Add DPLL framework base functions (diff) | |
| download | linux-5f18426928800c59fb0f9bc8fb0c182bb6f5ee24.tar.xz linux-5f18426928800c59fb0f9bc8fb0c182bb6f5ee24.zip | |
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 <jiri@nvidia.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/dpll')
| -rw-r--r-- | drivers/dpll/dpll_netlink.c | 16 |
1 files changed, 14 insertions, 2 deletions
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 @@ -48,6 +48,18 @@ dpll_msg_add_dev_parent_handle(struct sk_buff *msg, u32 id) } /** + * 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 * @pin: pin pointer @@ -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, |