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Date: Wed, 7 Sep 2016 19:57:52 +0530
From: Sriharsha Basavapatna <sriharsha.basavapatna@...adcom.com>
To: netdev@...r.kernel.org
Subject: [PATCH net-next 4/6] be2net: Avoid redundant addition of mac address in HW
From: Suresh Reddy <Suresh.Reddy@...adcom.com>
If a mac address is added to the uc_list and later the same mac address
is added via ndo_set_mac_address() or vice versa, the driver does not
detect this condition and tries to add it again. This results in a mac
address collision error when the FW rejects it.
Fix this by checking if the given mac address is present in uc_list while
setting the device mac address and vice versa. Similarly skip deletion if
the address is still in use in the other form.
Signed-off-by: Suresh Reddy <Suresh.Reddy@...adcom.com>
Signed-off-by: Sathya Perla <sathya.perla@...adcom.com>
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@...adcom.com>
---
drivers/net/ethernet/emulex/benet/be_main.c | 86 ++++++++++++++++++++++-------
1 file changed, 66 insertions(+), 20 deletions(-)
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 95d2fa3..a1c9920 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -269,6 +269,38 @@ void be_cq_notify(struct be_adapter *adapter, u16 qid, bool arm, u16 num_popped)
iowrite32(val, adapter->db + DB_CQ_OFFSET);
}
+static int be_dev_mac_add(struct be_adapter *adapter, u8 *mac)
+{
+ int i;
+
+ /* Check if mac has already been added as part of uc-list */
+ for (i = 0; i < adapter->uc_macs; i++) {
+ if (ether_addr_equal((u8 *)&adapter->uc_list[i * ETH_ALEN],
+ mac)) {
+ /* mac already added, skip addition */
+ adapter->pmac_id[0] = adapter->pmac_id[i + 1];
+ return 0;
+ }
+ }
+
+ return be_cmd_pmac_add(adapter, mac, adapter->if_handle,
+ &adapter->pmac_id[0], 0);
+}
+
+static void be_dev_mac_del(struct be_adapter *adapter, int pmac_id)
+{
+ int i;
+
+ /* Skip deletion if the programmed mac is
+ * being used in uc-list
+ */
+ for (i = 0; i < adapter->uc_macs; i++) {
+ if (adapter->pmac_id[i + 1] == pmac_id)
+ return;
+ }
+ be_cmd_pmac_del(adapter, adapter->if_handle, pmac_id, 0);
+}
+
static int be_mac_addr_set(struct net_device *netdev, void *p)
{
struct be_adapter *adapter = netdev_priv(netdev);
@@ -276,7 +308,7 @@ static int be_mac_addr_set(struct net_device *netdev, void *p)
struct sockaddr *addr = p;
int status;
u8 mac[ETH_ALEN];
- u32 old_pmac_id = adapter->pmac_id[0], curr_pmac_id = 0;
+ u32 old_pmac_id = adapter->pmac_id[0];
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
@@ -297,23 +329,22 @@ static int be_mac_addr_set(struct net_device *netdev, void *p)
* FILTMGMT privilege. This failure is OK, only if the PF programmed
* the MAC for the VF.
*/
- status = be_cmd_pmac_add(adapter, (u8 *)addr->sa_data,
- adapter->if_handle, &adapter->pmac_id[0], 0);
+ mutex_lock(&adapter->rx_filter_lock);
+ status = be_dev_mac_add(adapter, (u8 *)addr->sa_data);
if (!status) {
- curr_pmac_id = adapter->pmac_id[0];
/* Delete the old programmed MAC. This call may fail if the
* old MAC was already deleted by the PF driver.
*/
if (adapter->pmac_id[0] != old_pmac_id)
- be_cmd_pmac_del(adapter, adapter->if_handle,
- old_pmac_id, 0);
+ be_dev_mac_del(adapter, old_pmac_id);
}
+ mutex_unlock(&adapter->rx_filter_lock);
/* Decide if the new MAC is successfully activated only after
* querying the FW
*/
- status = be_cmd_get_active_mac(adapter, curr_pmac_id, mac,
+ status = be_cmd_get_active_mac(adapter, adapter->pmac_id[0], mac,
adapter->if_handle, true, 0);
if (status)
goto err;
@@ -1628,6 +1659,28 @@ static void be_clear_mc_list(struct be_adapter *adapter)
adapter->mc_count = 0;
}
+static int be_uc_mac_add(struct be_adapter *adapter, int uc_idx)
+{
+ if (ether_addr_equal((u8 *)&adapter->uc_list[uc_idx * ETH_ALEN],
+ adapter->netdev->dev_addr)) {
+ adapter->pmac_id[uc_idx + 1] = adapter->pmac_id[0];
+ return 0;
+ }
+
+ return be_cmd_pmac_add(adapter,
+ (u8 *)&adapter->uc_list[uc_idx * ETH_ALEN],
+ adapter->if_handle,
+ &adapter->pmac_id[uc_idx + 1], 0);
+}
+
+static void be_uc_mac_del(struct be_adapter *adapter, int pmac_id)
+{
+ if (pmac_id == adapter->pmac_id[0])
+ return;
+
+ be_cmd_pmac_del(adapter, adapter->if_handle, pmac_id, 0);
+}
+
static void be_set_uc_list(struct be_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
@@ -1668,13 +1721,10 @@ static void be_set_uc_list(struct be_adapter *adapter)
be_clear_uc_promisc(adapter);
for (i = 0; i < adapter->uc_macs; i++)
- be_cmd_pmac_del(adapter, adapter->if_handle,
- adapter->pmac_id[i + 1], 0);
+ be_uc_mac_del(adapter, adapter->pmac_id[i + 1]);
for (i = 0; i < curr_uc_macs; i++)
- be_cmd_pmac_add(adapter, adapter->uc_list[i].mac,
- adapter->if_handle,
- &adapter->pmac_id[i + 1], 0);
+ be_uc_mac_add(adapter, i);
adapter->uc_macs = curr_uc_macs;
adapter->update_uc_list = false;
}
@@ -1687,8 +1737,8 @@ static void be_clear_uc_list(struct be_adapter *adapter)
__dev_uc_unsync(netdev, NULL);
for (i = 0; i < adapter->uc_macs; i++)
- be_cmd_pmac_del(adapter, adapter->if_handle,
- adapter->pmac_id[i + 1], 0);
+ be_uc_mac_del(adapter, adapter->pmac_id[i + 1]);
+
adapter->uc_macs = 0;
}
@@ -3566,9 +3616,7 @@ static void be_rx_qs_destroy(struct be_adapter *adapter)
static void be_disable_if_filters(struct be_adapter *adapter)
{
- be_cmd_pmac_del(adapter, adapter->if_handle,
- adapter->pmac_id[0], 0);
-
+ be_dev_mac_del(adapter, adapter->pmac_id[0]);
be_clear_uc_list(adapter);
be_clear_mc_list(adapter);
@@ -3723,9 +3771,7 @@ static int be_enable_if_filters(struct be_adapter *adapter)
/* For BE3 VFs, the PF programs the initial MAC address */
if (!(BEx_chip(adapter) && be_virtfn(adapter))) {
- status = be_cmd_pmac_add(adapter, adapter->netdev->dev_addr,
- adapter->if_handle,
- &adapter->pmac_id[0], 0);
+ status = be_dev_mac_add(adapter, adapter->netdev->dev_addr);
if (status)
return status;
}
--
2.10.0.rc2.20.g5b18e70
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