netdev - [PATCH 1/1] ixgbe: add fiber tranceiver plug/unplug notifier

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Date:	Tue, 14 Jun 2016 21:43:24 +0800
From:	zyjzyj2000@...il.com
To:	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org
Cc:	Zhu Yanjun <zyjzyj2000@...il.com>
Subject: [PATCH 1/1] ixgbe: add fiber tranceiver plug/unplug notifier

From: Zhu Yanjun <zyjzyj2000@...il.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 <zyjzyj2000@...il.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