bnx2x: (semantic) revise scheduling of sp_rtnl

This removes the various points where the driver use bit operations in order
to schedule the sp_rtnl_task from the code, adding a single utility function
that does it instead.

Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x.h

@@ -1402,7 +1402,7 @@ struct bnx2x_fw_stats_data {
 };
 
 /* Public slow path states */
-enum {
+enum sp_rtnl_flag {
 	BNX2X_SP_RTNL_SETUP_TC,
 	BNX2X_SP_RTNL_TX_TIMEOUT,
 	BNX2X_SP_RTNL_FAN_FAILURE,

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c

@@ -4773,12 +4773,8 @@ void bnx2x_tx_timeout(struct net_device *dev)
 		bnx2x_panic();
 #endif
 
-	smp_mb__before_clear_bit();
-	set_bit(BNX2X_SP_RTNL_TX_TIMEOUT, &bp->sp_rtnl_state);
-	smp_mb__after_clear_bit();
-
 	/* This allows the netif to be shutdown gracefully before resetting */
-	schedule_delayed_work(&bp->sp_rtnl_task, 0);
+	bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_TX_TIMEOUT, 0);
 }
 
 int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
@@ -4906,3 +4902,15 @@ void bnx2x_update_coalesce_sb_index(struct bnx2x *bp, u8 fw_sb_id,
 	disable = disable ? 1 : (usec ? 0 : 1);
 	storm_memset_hc_disable(bp, port, fw_sb_id, sb_index, disable);
 }
+
+void bnx2x_schedule_sp_rtnl(struct bnx2x *bp, enum sp_rtnl_flag flag,
+			    u32 verbose)
+{
+	smp_mb__before_clear_bit();
+	set_bit(flag, &bp->sp_rtnl_state);
+	smp_mb__after_clear_bit();
+	DP((BNX2X_MSG_SP | verbose), "Scheduling sp_rtnl task [Flag: %d]\n",
+	   flag);
+	schedule_delayed_work(&bp->sp_rtnl_task, 0);
+}
+EXPORT_SYMBOL(bnx2x_schedule_sp_rtnl);

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h

@@ -1324,4 +1324,7 @@ void bnx2x_fill_fw_str(struct bnx2x *bp, char *buf, size_t buf_len);
 int bnx2x_drain_tx_queues(struct bnx2x *bp);
 void bnx2x_squeeze_objects(struct bnx2x *bp);
 
+void bnx2x_schedule_sp_rtnl(struct bnx2x*, enum sp_rtnl_flag,
+			    u32 verbose);
+
 #endif /* BNX2X_CMN_H */

drivers/net/ethernet/broadcom/bnx2x/bnx2x_dcb.c

@@ -710,8 +710,7 @@ static inline void bnx2x_dcbx_update_tc_mapping(struct bnx2x *bp)
 	 * as we are handling an attention on a work queue which must be
 	 * flushed at some rtnl-locked contexts (e.g. if down)
 	 */
-	if (!test_and_set_bit(BNX2X_SP_RTNL_SETUP_TC, &bp->sp_rtnl_state))
+	bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_SETUP_TC, 0);
-		schedule_delayed_work(&bp->sp_rtnl_task, 0);
 }
 
 void bnx2x_dcbx_set_params(struct bnx2x *bp, u32 state)
@@ -764,10 +763,7 @@ void bnx2x_dcbx_set_params(struct bnx2x *bp, u32 state)
 			if (IS_MF(bp))
 				bnx2x_link_sync_notify(bp);
 
-			set_bit(BNX2X_SP_RTNL_TX_STOP, &bp->sp_rtnl_state);
+			bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_TX_STOP, 0);
-
-			schedule_delayed_work(&bp->sp_rtnl_task, 0);
-
 			return;
 		}
 	case BNX2X_DCBX_STATE_TX_PAUSED:

drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c

@@ -3908,10 +3908,7 @@ static void bnx2x_fan_failure(struct bnx2x *bp)
 	 * This is due to some boards consuming sufficient power when driver is
 	 * up to overheat if fan fails.
 	 */
-	smp_mb__before_clear_bit();
+	bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_FAN_FAILURE, 0);
-	set_bit(BNX2X_SP_RTNL_FAN_FAILURE, &bp->sp_rtnl_state);
-	smp_mb__after_clear_bit();
-	schedule_delayed_work(&bp->sp_rtnl_task, 0);
 }
 
 static void bnx2x_attn_int_deasserted0(struct bnx2x *bp, u32 attn)
@@ -5303,6 +5300,8 @@ static void bnx2x_eq_int(struct bnx2x *bp)
 					break;
 
 			} else {
+				int cmd = BNX2X_SP_RTNL_AFEX_F_UPDATE;
+
 				DP(BNX2X_MSG_SP | BNX2X_MSG_MCP,
 				   "AFEX: ramrod completed FUNCTION_UPDATE\n");
 				f_obj->complete_cmd(bp, f_obj,
@@ -5312,12 +5311,7 @@ static void bnx2x_eq_int(struct bnx2x *bp)
 				 * sp_rtnl task as all Queue SP operations
 				 * should run under rtnl_lock.
 				 */
-				smp_mb__before_clear_bit();
+				bnx2x_schedule_sp_rtnl(bp, cmd, 0);
-				set_bit(BNX2X_SP_RTNL_AFEX_F_UPDATE,
-					&bp->sp_rtnl_state);
-				smp_mb__after_clear_bit();
-
-				schedule_delayed_work(&bp->sp_rtnl_task, 0);
 			}
 
 			goto next_spqe;
@@ -12082,11 +12076,8 @@ static void bnx2x_set_rx_mode(struct net_device *dev)
 		return;
 	} else {
 		/* Schedule an SP task to handle rest of change */
-		DP(NETIF_MSG_IFUP, "Scheduling an Rx mode change\n");
+		bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_RX_MODE,
-		smp_mb__before_clear_bit();
+				       NETIF_MSG_IFUP);
-		set_bit(BNX2X_SP_RTNL_RX_MODE, &bp->sp_rtnl_state);
-		smp_mb__after_clear_bit();
-		schedule_delayed_work(&bp->sp_rtnl_task, 0);
 	}
 }
 
@@ -12119,11 +12110,8 @@ void bnx2x_set_rx_mode_inner(struct bnx2x *bp)
 			/* configuring mcast to a vf involves sleeping (when we
 			 * wait for the pf's response).
 			 */
-			smp_mb__before_clear_bit();
+			bnx2x_schedule_sp_rtnl(bp,
-			set_bit(BNX2X_SP_RTNL_VFPF_MCAST,
+					       BNX2X_SP_RTNL_VFPF_MCAST, 0);
-				&bp->sp_rtnl_state);
-			smp_mb__after_clear_bit();
-			schedule_delayed_work(&bp->sp_rtnl_task, 0);
 		}
 	}
 

drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c

@@ -983,11 +983,8 @@ op_err:
 op_done:
 	case BNX2X_VFOP_QSETUP_DONE:
 		vf->cfg_flags |= VF_CFG_VLAN;
-		smp_mb__before_clear_bit();
+		bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_HYPERVISOR_VLAN,
-		set_bit(BNX2X_SP_RTNL_HYPERVISOR_VLAN,
+				       BNX2X_MSG_IOV);
-			&bp->sp_rtnl_state);
-		smp_mb__after_clear_bit();
-		schedule_delayed_work(&bp->sp_rtnl_task, 0);
 		bnx2x_vfop_end(bp, vf, vfop);
 		return;
 	default:
@@ -3812,13 +3809,9 @@ void bnx2x_timer_sriov(struct bnx2x *bp)
 	bnx2x_sample_bulletin(bp);
 
 	/* if channel is down we need to self destruct */
-	if (bp->old_bulletin.valid_bitmap & 1 << CHANNEL_DOWN) {
+	if (bp->old_bulletin.valid_bitmap & 1 << CHANNEL_DOWN)
-		smp_mb__before_clear_bit();
+		bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_VFPF_CHANNEL_DOWN,
-		set_bit(BNX2X_SP_RTNL_VFPF_CHANNEL_DOWN,
+				       BNX2X_MSG_IOV);
-			&bp->sp_rtnl_state);
-		smp_mb__after_clear_bit();
-		schedule_delayed_work(&bp->sp_rtnl_task, 0);
-	}
 }
 
 void __iomem *bnx2x_vf_doorbells(struct bnx2x *bp)