netdev - [net-next 02/10] i40e: move I40E_FLAG_UDP_FILTER

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Message-Id: <20180326214103.18218-3-jeffrey.t.kirsher@intel.com>
Date:   Mon, 26 Mar 2018 14:40:55 -0700
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     davem@...emloft.net
Cc:     Jacob Keller <jacob.e.keller@...el.com>, netdev@...r.kernel.org,
        nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 02/10] i40e: move I40E_FLAG_UDP_FILTER_SYNC to the state field

From: Jacob Keller <jacob.e.keller@...el.com>

This flag is modified during run time, possibly even when the RTNL lock
is not held. Additionally it has a few places which should be using
test_and_set or test_and_clear atomic bit operations.

Create a new state bit __I40E_UDP_SYNC_PENDING and use it instead of the
ole I40E_FLAG_UDP_FILTER_SYNC flag.

This is part of a larger effort to remove the need for using cmpxchg64
in i40e_set_priv_flags.

Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h      |  3 ++-
 drivers/net/ethernet/intel/i40e/i40e_main.c | 10 ++++------
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 52f99142244b..f557c3c36080 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -163,6 +163,7 @@ enum i40e_state_t {
 	__I40E_PORT_SUSPENDED,
 	__I40E_VF_DISABLE,
 	__I40E_MACVLAN_SYNC_PENDING,
+	__I40E_UDP_FILTER_SYNC_PENDING,
 	/* This must be last as it determines the size of the BITMAP */
 	__I40E_STATE_SIZE__,
 };
@@ -526,7 +527,7 @@ struct i40e_pf {
 #define I40E_FLAG_FD_SB_AUTO_DISABLED		BIT_ULL(11)
 #define I40E_FLAG_FD_ATR_AUTO_DISABLED		BIT_ULL(12)
 #define I40E_FLAG_MFP_ENABLED			BIT_ULL(13)
-#define I40E_FLAG_UDP_FILTER_SYNC		BIT_ULL(14)
+/* Gap for BIT_ULL(14) */
 #define I40E_FLAG_HW_ATR_EVICT_ENABLED		BIT_ULL(15)
 #define I40E_FLAG_VEB_MODE_ENABLED		BIT_ULL(16)
 #define I40E_FLAG_VEB_STATS_ENABLED		BIT_ULL(17)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 7fc2c6d89637..3177e82059e6 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -9721,7 +9721,7 @@ static void i40e_sync_udp_filters(struct i40e_pf *pf)
 			pf->pending_udp_bitmap |= BIT_ULL(i);
 	}
 
-	pf->flags |= I40E_FLAG_UDP_FILTER_SYNC;
+	set_bit(__I40E_UDP_FILTER_SYNC_PENDING, pf->state);
 }
 
 /**
@@ -9735,11 +9735,9 @@ static void i40e_sync_udp_filters_subtask(struct i40e_pf *pf)
 	u16 port;
 	int i;
 
-	if (!(pf->flags & I40E_FLAG_UDP_FILTER_SYNC))
+	if (!test_and_clear_bit(__I40E_UDP_FILTER_SYNC_PENDING, pf->state))
 		return;
 
-	pf->flags &= ~I40E_FLAG_UDP_FILTER_SYNC;
-
 	for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
 		if (pf->pending_udp_bitmap & BIT_ULL(i)) {
 			pf->pending_udp_bitmap &= ~BIT_ULL(i);
@@ -11439,7 +11437,7 @@ static void i40e_udp_tunnel_add(struct net_device *netdev,
 	/* New port: add it and mark its index in the bitmap */
 	pf->udp_ports[next_idx].port = port;
 	pf->pending_udp_bitmap |= BIT_ULL(next_idx);
-	pf->flags |= I40E_FLAG_UDP_FILTER_SYNC;
+	set_bit(__I40E_UDP_FILTER_SYNC_PENDING, pf->state);
 }
 
 /**
@@ -11480,7 +11478,7 @@ static void i40e_udp_tunnel_del(struct net_device *netdev,
 	 */
 	pf->udp_ports[idx].port = 0;
 	pf->pending_udp_bitmap |= BIT_ULL(idx);
-	pf->flags |= I40E_FLAG_UDP_FILTER_SYNC;
+	set_bit(__I40E_UDP_FILTER_SYNC_PENDING, pf->state);
 
 	return;
 not_found:
-- 
2.14.3