fm10k: Add service task to handle delayed events

This patch adds support for the service task.  The service task takes care
of all processes that cannot be done in interrupt context such as resets,
stats updates, TC prio updates, and checking for hung or detached devices.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/fm10k/fm10k.h

@@ -239,8 +239,21 @@ struct fm10k_intfc {
 	/* TX */
 	struct fm10k_ring *tx_ring[MAX_QUEUES] ____cacheline_aligned_in_smp;
 
+	u64 restart_queue;
+	u64 tx_busy;
+	u64 tx_csum_errors;
+	u64 alloc_failed;
+	u64 rx_csum_errors;
+	u64 rx_errors;
+
+	u64 tx_bytes_nic;
+	u64 tx_packets_nic;
+	u64 rx_bytes_nic;
+	u64 rx_packets_nic;
+	u64 rx_drops_nic;
 	u64 rx_overrun_pf;
 	u64 rx_overrun_vf;
+	u32 tx_timeout_count;
 
 	/* RX */
 	struct fm10k_ring *rx_ring[MAX_QUEUES];
@@ -257,6 +270,13 @@ struct fm10k_intfc {
 	u16 msg_enable;
 	u16 tx_ring_count;
 	u16 rx_ring_count;
+	struct timer_list service_timer;
+	struct work_struct service_task;
+	unsigned long next_stats_update;
+	unsigned long next_tx_hang_check;
+	unsigned long last_reset;
+	unsigned long link_down_event;
+	bool host_ready;
 
 	u32 reta[FM10K_RETA_SIZE];
 	u32 rssrk[FM10K_RSSRK_SIZE];
@@ -280,6 +300,8 @@ struct fm10k_intfc {
 enum fm10k_state_t {
 	__FM10K_RESETTING,
 	__FM10K_DOWN,
+	__FM10K_SERVICE_SCHED,
+	__FM10K_SERVICE_DISABLE,
 	__FM10K_MBX_LOCK,
 	__FM10K_LINK_DOWN,
 };
@@ -379,6 +401,9 @@ int fm10k_register_pci_driver(void);
 void fm10k_unregister_pci_driver(void);
 void fm10k_up(struct fm10k_intfc *interface);
 void fm10k_down(struct fm10k_intfc *interface);
+void fm10k_update_stats(struct fm10k_intfc *interface);
+void fm10k_service_event_schedule(struct fm10k_intfc *interface);
+void fm10k_update_rx_drop_en(struct fm10k_intfc *interface);
 
 /* Netdev */
 struct net_device *fm10k_alloc_netdev(void);