From: Ido Schimmel <idosch@mellanox.com>
Date: Sat, 3 Dec 2016 15:45:02 +0000 (+0100)
Subject: rocker: Create an ordered workqueue for FIB offload
X-Git-Tag: v4.10-rc1~202^2~92^2~5
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=c1bb279cfa9d079bdee35402f5d13210f25f5c80;p=linux.git

rocker: Create an ordered workqueue for FIB offload

As explained in the previous commits, we need to process FIB entries
addition / deletion events in FIFO order or otherwise we can have a
mismatch between the kernel's FIB table and the device's.

Create an ordered workqueue for rocker to which these work items will be
submitted to.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/rocker/rocker.h b/drivers/net/ethernet/rocker/rocker.h
index 2eb9b49569d5..ee9675db5bf9 100644
--- a/drivers/net/ethernet/rocker/rocker.h
+++ b/drivers/net/ethernet/rocker/rocker.h
@@ -72,6 +72,7 @@ struct rocker {
 	struct rocker_dma_ring_info event_ring;
 	struct notifier_block fib_nb;
 	struct rocker_world_ops *wops;
+	struct workqueue_struct *rocker_owq;
 	void *wpriv;
 };
 
diff --git a/drivers/net/ethernet/rocker/rocker_main.c b/drivers/net/ethernet/rocker/rocker_main.c
index 67df4cf93362..424be969da3f 100644
--- a/drivers/net/ethernet/rocker/rocker_main.c
+++ b/drivers/net/ethernet/rocker/rocker_main.c
@@ -28,6 +28,7 @@
 #include <linux/if_bridge.h>
 #include <linux/bitops.h>
 #include <linux/ctype.h>
+#include <linux/workqueue.h>
 #include <net/switchdev.h>
 #include <net/rtnetlink.h>
 #include <net/netevent.h>
@@ -2754,6 +2755,13 @@ static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto err_request_event_irq;
 	}
 
+	rocker->rocker_owq = alloc_ordered_workqueue(rocker_driver_name,
+						     WQ_MEM_RECLAIM);
+	if (!rocker->rocker_owq) {
+		err = -ENOMEM;
+		goto err_alloc_ordered_workqueue;
+	}
+
 	rocker->hw.id = rocker_read64(rocker, SWITCH_ID);
 
 	err = rocker_probe_ports(rocker);
@@ -2771,6 +2779,8 @@ static int rocker_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	return 0;
 
 err_probe_ports:
+	destroy_workqueue(rocker->rocker_owq);
+err_alloc_ordered_workqueue:
 	free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
 err_request_event_irq:
 	free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
@@ -2799,6 +2809,7 @@ static void rocker_remove(struct pci_dev *pdev)
 	unregister_fib_notifier(&rocker->fib_nb);
 	rocker_write32(rocker, CONTROL, ROCKER_CONTROL_RESET);
 	rocker_remove_ports(rocker);
+	destroy_workqueue(rocker->rocker_owq);
 	free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_EVENT), rocker);
 	free_irq(rocker_msix_vector(rocker, ROCKER_MSIX_VEC_CMD), rocker);
 	rocker_dma_rings_fini(rocker);