Hi, all
When the fiber tranceiver is plugged/unplugged from the nic, there is no
any notifier to indicate this event now.
This event sometimes is needed by the userspace tools or kernel.
So,
Is there any interrupt to indicate this event?
If no interrupt, is there any method to notify this event to the netdev
notifier chain?
I made a new patch to send the notifier when the fiber tranceiver is
plugged/unplugged.
This patch is based on the function ixgbe_sfp_detection_subtask.
When the fiber tranceiver is plugged/unplugged, the value in the register
is changed, then
NETDEV_FIBER_TRANCEIVER_UNPLUG/NETDEV_FIBER_TRANCEIVER_PLUG notifier is
sent.
This patch can work well with the following steps:
1. boot the host
2. ip link set eth0 up
3. unplug the fiber tranceiver
4. a message NETDEV_FIBER_TRANCEIVER_UNPLUG is sent
5. plug the fiber tranceiver
6. a notifier NETDEV_FIBER_TRANCEIVER_PLUG is sent
Please comment on it.
On Tue, Jun 14, 2016 at 9:43 PM, <zyjzyj2...@gmail.com> wrote:
> From: Zhu Yanjun <zyjzyj2...@gmail.com>
>
> When the fiber tranceiver is plugged/unplugged, a netdev notifier is
> sent. The userspace tools or kernel can receive this notifier.
>
> Signed-off-by: Zhu Yanjun <zyjzyj2...@gmail.com>
> ---
> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 26
> ++++++++++++++++++++++++-
> drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 3 +++
> include/linux/netdevice.h | 2 ++
> 3 files changed, 30 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> index cb19cbc..df0eed3 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> @@ -5635,6 +5635,8 @@ static int ixgbe_sw_init(struct ixgbe_adapter
> *adapter)
> hw->revision_id = pdev->revision;
> hw->subsystem_vendor_id = pdev->subsystem_vendor;
> hw->subsystem_device_id = pdev->subsystem_device;
> + hw->last_tranceiver_status = IXGBE_NOT_IMPLEMENTED;
> + hw->tranceiver_polltime = 0;
>
> /* Set common capability flags and settings */
> rss = min_t(int, ixgbe_max_rss_indices(adapter),
> num_online_cpus());
> @@ -7067,7 +7069,25 @@ static void ixgbe_watchdog_subtask(struct
> ixgbe_adapter *adapter)
> static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
> {
> struct ixgbe_hw *hw = &adapter->hw;
> - s32 err;
> + s32 err, status;
> +
> + if ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
> + time_after(jiffies, hw->tranceiver_polltime)) {
> + u8 identifier;
> +
> + status = hw->phy.ops.read_i2c_eeprom(hw,
> + 0x0,
> + &identifier);
> + if ((status != hw->last_tranceiver_status) && status) {
> + hw->phy.sfp_type = ixgbe_sfp_type_not_present;
> + rtnl_lock();
> +
> call_netdevice_notifiers(NETDEV_FIBER_TRANCEIVER_UNPLUG,
> + adapter->netdev);
> + rtnl_unlock();
> + }
> + hw->last_tranceiver_status = status;
> + hw->tranceiver_polltime = jiffies + 3 * HZ;
> + }
>
> /* If crosstalk fix enabled verify the SFP+ cage is full */
> if (adapter->need_crosstalk_fix) {
> @@ -7130,6 +7150,10 @@ static void ixgbe_sfp_detection_subtask(struct
> ixgbe_adapter *adapter)
> adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
> e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
>
> + rtnl_lock();
> + call_netdevice_notifiers(NETDEV_FIBER_TRANCEIVER_PLUG,
> adapter->netdev);
> + rtnl_unlock();
> +
> sfp_out:
> clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
>
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> index da3d835..0dde95c 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
> @@ -3525,6 +3525,8 @@ struct ixgbe_hw {
> bool force_full_reset;
> bool allow_unsupported_sfp;
> bool wol_enabled;
> + s32 last_tranceiver_status;
> + unsigned long tranceiver_polltime;
> };
>
> struct ixgbe_info {
> @@ -3574,6 +3576,7 @@ struct ixgbe_info {
> #define IXGBE_ERR_FDIR_CMD_INCOMPLETE -38
> #define IXGBE_ERR_FW_RESP_INVALID -39
> #define IXGBE_ERR_TOKEN_RETRY -40
> +#define IXGBE_ERR_TRANCEIVER_NOT_PRESENT -41
> #define IXGBE_NOT_IMPLEMENTED 0x7FFFFFFF
>
> #define IXGBE_FUSES0_GROUP(_i) (0x11158 + ((_i) * 4))
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index d101e4d..693ba92 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -2253,6 +2253,8 @@ struct netdev_lag_lower_state_info {
> #define NETDEV_CHANGELOWERSTATE 0x001B
> #define NETDEV_OFFLOAD_PUSH_VXLAN 0x001C
> #define NETDEV_OFFLOAD_PUSH_GENEVE 0x001D
> +#define NETDEV_FIBER_TRANCEIVER_PLUG 0x001E
> +#define NETDEV_FIBER_TRANCEIVER_UNPLUG 0x001F
>
> int register_netdevice_notifier(struct notifier_block *nb);
> int unregister_netdevice_notifier(struct notifier_block *nb);
> --
> 1.7.9.5
>
>
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