From: "Alex Maftei (amaftei)" <amaftei@solarflare.com>
Date: Wed, 8 Jan 2020 16:10:59 +0000
Subject: sfc: move reset workqueue code
Patch-mainline: v5.6-rc1
Git-commit: 82c64484024af04489bb1870bd1c6b61c603ca78
References: jsc#SLE-8314

Small functions doing work that will be common, related to reset
workqueue management.

Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/sfc/Makefile     |    7 ++--
 drivers/net/ethernet/sfc/efx.c        |   22 ++++--------
 drivers/net/ethernet/sfc/efx_common.c |   58 ++++++++++++++++++++++++++++++++++
 3 files changed, 70 insertions(+), 17 deletions(-)
 create mode 100644 drivers/net/ethernet/sfc/efx_common.c

--- a/drivers/net/ethernet/sfc/Makefile
+++ b/drivers/net/ethernet/sfc/Makefile
@@ -1,7 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
-sfc-y			+= efx.o nic.o farch.o siena.o ef10.o tx.o rx.o \
+sfc-y			+= efx.o efx_common.o nic.o \
+			   farch.o siena.o ef10.o \
+			   tx.o rx.o \
 			   selftest.o ethtool.o ptp.o tx_tso.o \
-			   mcdi.o mcdi_port.o mcdi_mon.o
+			   mcdi.o mcdi_port.o \
+			   mcdi_mon.o
 sfc-$(CONFIG_SFC_MTD)	+= mtd.o
 sfc-$(CONFIG_SFC_SRIOV)	+= sriov.o siena_sriov.o ef10_sriov.o
 
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -108,12 +108,6 @@ void efx_get_udp_tunnel_type_name(u16 ty
 		snprintf(buf, buflen, "type %d", type);
 }
 
-/* Reset workqueue. If any NIC has a hardware failure then a reset will be
- * queued onto this work queue. This is not a per-nic work queue, because
- * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
- */
-static struct workqueue_struct *reset_workqueue;
-
 /* How often and how many times to poll for a reset while waiting for a
  * BIST that another function started to complete.
  */
@@ -3106,7 +3100,7 @@ void efx_schedule_reset(struct efx_nic *
 	 * reset is scheduled. So switch back to poll'd MCDI completions. */
 	efx_mcdi_mode_poll(efx);
 
-	queue_work(reset_workqueue, &efx->reset_work);
+	efx_queue_reset_work(efx);
 }
 
 /**************************************************************************
@@ -3492,7 +3486,7 @@ static void efx_pci_remove_main(struct e
 	 * are not READY.
 	 */
 	BUG_ON(efx->state == STATE_READY);
-	cancel_work_sync(&efx->reset_work);
+	efx_flush_reset_workqueue(efx);
 
 	efx_disable_interrupts(efx);
 	efx_clear_interrupt_affinity(efx);
@@ -3878,7 +3872,7 @@ static int efx_pm_thaw(struct device *de
 	rtnl_unlock();
 
 	/* Reschedule any quenched resets scheduled during efx_pm_freeze() */
-	queue_work(reset_workqueue, &efx->reset_work);
+	efx_queue_reset_work(efx);
 
 	return 0;
 
@@ -4077,11 +4071,9 @@ static int __init efx_init_module(void)
 		goto err_sriov;
 #endif
 
-	reset_workqueue = create_singlethread_workqueue("sfc_reset");
-	if (!reset_workqueue) {
-		rc = -ENOMEM;
+	rc = efx_create_reset_workqueue();
+	if (rc)
 		goto err_reset;
-	}
 
 	rc = pci_register_driver(&efx_pci_driver);
 	if (rc < 0)
@@ -4090,7 +4082,7 @@ static int __init efx_init_module(void)
 	return 0;
 
  err_pci:
-	destroy_workqueue(reset_workqueue);
+	efx_destroy_reset_workqueue();
  err_reset:
 #ifdef CONFIG_SFC_SRIOV
 	efx_fini_sriov();
@@ -4106,7 +4098,7 @@ static void __exit efx_exit_module(void)
 	printk(KERN_INFO "Solarflare NET driver unloading\n");
 
 	pci_unregister_driver(&efx_pci_driver);
-	destroy_workqueue(reset_workqueue);
+	efx_destroy_reset_workqueue();
 #ifdef CONFIG_SFC_SRIOV
 	efx_fini_sriov();
 #endif
--- /dev/null
+++ b/drivers/net/ethernet/sfc/efx_common.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2018 Solarflare Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+
+#include "net_driver.h"
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include "efx_common.h"
+#include "efx_channels.h"
+#include "efx.h"
+#include "mcdi.h"
+#include "selftest.h"
+#include "rx_common.h"
+#include "tx_common.h"
+#include "nic.h"
+#include "io.h"
+#include "mcdi_pcol.h"
+
+/* Reset workqueue. If any NIC has a hardware failure then a reset will be
+ * queued onto this work queue. This is not a per-nic work queue, because
+ * efx_reset_work() acquires the rtnl lock, so resets are naturally serialised.
+ */
+static struct workqueue_struct *reset_workqueue;
+
+int efx_create_reset_workqueue(void)
+{
+	reset_workqueue = create_singlethread_workqueue("sfc_reset");
+	if (!reset_workqueue) {
+		printk(KERN_ERR "Failed to create reset workqueue\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+void efx_queue_reset_work(struct efx_nic *efx)
+{
+	queue_work(reset_workqueue, &efx->reset_work);
+}
+
+void efx_flush_reset_workqueue(struct efx_nic *efx)
+{
+	cancel_work_sync(&efx->reset_work);
+}
+
+void efx_destroy_reset_workqueue(void)
+{
+	if (reset_workqueue) {
+		destroy_workqueue(reset_workqueue);
+		reset_workqueue = NULL;
+	}
+}