bnx2x: Renaming the "reset_task" to "sp_rtnl_task"

Renaming the "reset_task" to a more general purpose name,
 "sp_rtnl_task", as it is already used for another purpose
 other than reset which is parity recovery, and since I
 plan to add a third operation for this task, updating the
 priority to traffic class and traffic class to transmission
 queues mappings after dcbx negotiation takes place.
 Signed-off-by: Ariel Elior <ariele@broadcom.com>
 Signed-off-by: Eilon Greenstein <eilong@broadcom.com>

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 45 insertions, 21 deletions

diff --git a/drivers/net/bnx2x/bnx2x.h b/drivers/net/bnx2x/bnx2x.h
index 0d4b98126241..16dc2c9df8b7 100644
--- a/drivers/net/bnx2x/bnx2x.h
+++ b/drivers/net/bnx2x/bnx2x.h
@@ -1046,6 +1046,12 @@ struct bnx2x_fw_stats_data {
         struct per_queue_stats  queue_stats[1];
 };
 
+/* Public slow path states */
+enum {
+        BNX2X_SP_RTNL_TX_TIMEOUT,
+};
+
+
 struct bnx2x {
         /* Fields used in the tx and intr/napi performance paths
          * are grouped together in the beginning of the structure
@@ -1159,7 +1165,7 @@ struct bnx2x {
         int                     mrrs;
 
         struct delayed_work     sp_task;
-        struct delayed_work     reset_task;
+        struct delayed_work     sp_rtnl_task;
 
         struct delayed_work     period_task;
         struct timer_list       timer;
@@ -1403,6 +1409,9 @@ struct bnx2x {
 
         unsigned long                           sp_state;
 
+        /* operation indication for the sp_rtnl task */
+        unsigned long                           sp_rtnl_state;
+
         /* DCBX Negotation results */
         struct dcbx_features                    dcbx_local_feat;
         u32                                     dcbx_error;
diff --git a/drivers/net/bnx2x/bnx2x_cmn.c b/drivers/net/bnx2x/bnx2x_cmn.c
index bb7556016f41..8763625b09d0 100644
--- a/drivers/net/bnx2x/bnx2x_cmn.c
+++ b/drivers/net/bnx2x/bnx2x_cmn.c
@@ -3233,8 +3233,13 @@ void bnx2x_tx_timeout(struct net_device *dev)
         if (!bp->panic)
                 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->reset_task, 0);
+        schedule_delayed_work(&bp->sp_rtnl_task, 0);
 }
 
 int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c
index 5b4a8f34b13c..53f4ec3d1d9e 100644
--- a/drivers/net/bnx2x/bnx2x_main.c
+++ b/drivers/net/bnx2x/bnx2x_main.c
@@ -4020,7 +4020,7 @@ static void bnx2x_attn_int_deasserted(struct bnx2x *bp, u32 deasserted)
         if (bnx2x_chk_parity_attn(bp, &global, true)) {
 #ifndef BNX2X_STOP_ON_ERROR
                 bp->recovery_state = BNX2X_RECOVERY_INIT;
-                schedule_delayed_work(&bp->reset_task, 0);
+                schedule_delayed_work(&bp->sp_rtnl_task, 0);
                 /* Disable HW interrupts */
                 bnx2x_int_disable(bp);
                 /* In case of parity errors don't handle attentions so that
@@ -7963,7 +7963,7 @@ static void bnx2x_parity_recover(struct bnx2x *bp)
                                         /* Wait until all other functions get
                                          * down.
                                          */
-                                        schedule_delayed_work(&bp->reset_task,
+                                        schedule_delayed_work(&bp->sp_rtnl_task,
                                                                 HZ/10);
                                         return;
                                 } else {
@@ -8000,7 +8000,7 @@ static void bnx2x_parity_recover(struct bnx2x *bp)
                                                 break;
                                         }
 
-                                        schedule_delayed_work(&bp->reset_task,
+                                        schedule_delayed_work(&bp->sp_rtnl_task,
                                                                 HZ/10);
                                         return;
 
@@ -8011,7 +8011,8 @@ static void bnx2x_parity_recover(struct bnx2x *bp)
                                          */
                                         if (bnx2x_reset_is_global(bp)) {
                                                 schedule_delayed_work(
-                                                        &bp->reset_task, HZ/10);
+                                                        &bp->sp_rtnl_task,
+                                                        HZ/10);
                                                 return;
                                         }
 
@@ -8035,30 +8036,39 @@ static void bnx2x_parity_recover(struct bnx2x *bp)
 /* bnx2x_nic_unload() flushes the bnx2x_wq, thus reset task is
  * scheduled on a general queue in order to prevent a dead lock.
  */
-static void bnx2x_reset_task(struct work_struct *work)
+static void bnx2x_sp_rtnl_task(struct work_struct *work)
 {
-        struct bnx2x *bp = container_of(work, struct bnx2x, reset_task.work);
-
-#ifdef BNX2X_STOP_ON_ERROR
-        BNX2X_ERR("reset task called but STOP_ON_ERROR defined"
-                  " so reset not done to allow debug dump,\n"
-         KERN_ERR " you will need to reboot when done\n");
-        return;
-#endif
+        struct bnx2x *bp = container_of(work, struct bnx2x, sp_rtnl_task.work);
 
         rtnl_lock();
 
         if (!netif_running(bp->dev))
-                goto reset_task_exit;
+                goto sp_rtnl_exit;
+
+        /* if stop on error is defined no recovery flows should be executed */
+#ifdef BNX2X_STOP_ON_ERROR
+        BNX2X_ERR("recovery flow called but STOP_ON_ERROR defined "
+                  "so reset not done to allow debug dump,\n"
+                  "you will need to reboot when done\n");
+        goto sp_rtnl_exit;
+#endif
 
-        if (unlikely(bp->recovery_state != BNX2X_RECOVERY_DONE))
+        if (unlikely(bp->recovery_state != BNX2X_RECOVERY_DONE)) {
+                /*
+                 * Clear TX_TIMEOUT bit as we are going to reset the function
+                 * anyway.
+                 */
+                smp_mb__before_clear_bit();
+                clear_bit(BNX2X_SP_RTNL_TX_TIMEOUT, &bp->sp_rtnl_state);
+                smp_mb__after_clear_bit();
                 bnx2x_parity_recover(bp);
-        else {
+        } else if (test_and_clear_bit(BNX2X_SP_RTNL_TX_TIMEOUT,
+                                    &bp->sp_rtnl_state)){
                 bnx2x_nic_unload(bp, UNLOAD_NORMAL);
                 bnx2x_nic_load(bp, LOAD_NORMAL);
         }
 
-reset_task_exit:
+sp_rtnl_exit:
         rtnl_unlock();
 }
 
@@ -9291,7 +9301,7 @@ static int __devinit bnx2x_init_bp(struct bnx2x *bp)
 #endif
 
         INIT_DELAYED_WORK(&bp->sp_task, bnx2x_sp_task);
-        INIT_DELAYED_WORK(&bp->reset_task, bnx2x_reset_task);
+        INIT_DELAYED_WORK(&bp->sp_rtnl_task, bnx2x_sp_rtnl_task);
         INIT_DELAYED_WORK(&bp->period_task, bnx2x_period_task);
         rc = bnx2x_get_hwinfo(bp);
         if (rc)
@@ -10342,7 +10352,7 @@ static void __devexit bnx2x_remove_one(struct pci_dev *pdev)
         bnx2x_set_power_state(bp, PCI_D3hot);
 
         /* Make sure RESET task is not scheduled before continuing */
-        cancel_delayed_work_sync(&bp->reset_task);
+        cancel_delayed_work_sync(&bp->sp_rtnl_task);
 
         if (bp->regview)
                 iounmap(bp->regview);