be2net: enable IFACE filters only after creating RXQs

HW issues were observed on Lancer adapters if IFACE filters
(flags, mac addrs etc) are enabled *before* creating RXQs.  This patch
changes the driver design by enabling filters in be_open() --
instead of be_setup() -- after RXQs are created and buffers posted.
Two new wrapper functions, be_enable_if_filters() and
be_disable_if_filters() are introduced to enable/disable IFACE filters in
be_open()/be_close() respectively. In be_setup() the IFACE is now created
only with the RSS flag.

Signed-off-by: Kalesh AP <kalesh.purayil@avagotech.com>
Signed-off-by: Sathya Perla <sathya.perla@avagotech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.h b/drivers/net/ethernet/emulex/benet/be_cmds.h
index 2716e6f..00e3a6b 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_cmds.h
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.h
@@ -620,6 +620,11 @@ enum be_if_flags {
                                         BE_IF_FLAGS_VLAN_PROMISCUOUS |\
                                         BE_IF_FLAGS_MCAST_PROMISCUOUS)
 
+#define BE_IF_EN_FLAGS (BE_IF_FLAGS_BROADCAST | BE_IF_FLAGS_PASS_L3L4_ERRORS |\
+                       BE_IF_FLAGS_MULTICAST | BE_IF_FLAGS_UNTAGGED)
+
+#define BE_IF_ALL_FILT_FLAGS   (BE_IF_EN_FLAGS | BE_IF_FLAGS_ALL_PROMISCUOUS)
+
 /* An RX interface is an object with one or more MAC addresses and
  * filtering capabilities. */
 struct be_cmd_req_if_create {

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 6f64242..7730f21 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -273,6 +273,10 @@ static int be_mac_addr_set(struct net_device *netdev, void *p)
        if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
                return 0;
 
+       /* if device is not running, copy MAC to netdev->dev_addr */
+       if (!netif_running(netdev))
+               goto done;
+
        /* The PMAC_ADD cmd may fail if the VF doesn't have FILTMGMT
         * privilege or if PF did not provision the new MAC address.
         * On BE3, this cmd will always fail if the VF doesn't have the
@@ -307,9 +311,9 @@ static int be_mac_addr_set(struct net_device *netdev, void *p)
                status = -EPERM;
                goto err;
        }
-
-       memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
-       dev_info(dev, "MAC address changed to %pM\n", mac);
+done:
+       ether_addr_copy(netdev->dev_addr, addr->sa_data);
+       dev_info(dev, "MAC address changed to %pM\n", addr->sa_data);
        return 0;
 err:
        dev_warn(dev, "MAC address change to %pM failed\n", addr->sa_data);
@@ -3361,6 +3365,33 @@ 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_clear_uc_list(adapter);
+
+       /* The IFACE flags are enabled in the open path and cleared
+        * in the close path. When a VF gets detached from the host and
+        * assigned to a VM the following happens:
+        *      - VF's IFACE flags get cleared in the detach path
+        *      - IFACE create is issued by the VF in the attach path
+        * Due to a bug in the BE3/Skyhawk-R FW
+        * (Lancer FW doesn't have the bug), the IFACE capability flags
+        * specified along with the IFACE create cmd issued by a VF are not
+        * honoured by FW.  As a consequence, if a *new* driver
+        * (that enables/disables IFACE flags in open/close)
+        * is loaded in the host and an *old* driver is * used by a VM/VF,
+        * the IFACE gets created *without* the needed flags.
+        * To avoid this, disable RX-filter flags only for Lancer.
+        */
+       if (lancer_chip(adapter)) {
+               be_cmd_rx_filter(adapter, BE_IF_ALL_FILT_FLAGS, OFF);
+               adapter->if_flags &= ~BE_IF_ALL_FILT_FLAGS;
+       }
+}
+
 static int be_close(struct net_device *netdev)
 {
        struct be_adapter *adapter = netdev_priv(netdev);
@@ -3373,6 +3404,8 @@ static int be_close(struct net_device *netdev)
        if (!(adapter->flags & BE_FLAGS_SETUP_DONE))
                return 0;
 
+       be_disable_if_filters(adapter);
+
        be_roce_dev_close(adapter);
 
        if (adapter->flags & BE_FLAGS_NAPI_ENABLED) {
@@ -3392,7 +3425,6 @@ static int be_close(struct net_device *netdev)
        be_tx_compl_clean(adapter);
 
        be_rx_qs_destroy(adapter);
-       be_clear_uc_list(adapter);
 
        for_all_evt_queues(adapter, eqo, i) {
                if (msix_enabled(adapter))
@@ -3477,6 +3509,31 @@ static int be_rx_qs_create(struct be_adapter *adapter)
        return 0;
 }
 
+static int be_enable_if_filters(struct be_adapter *adapter)
+{
+       int status;
+
+       status = be_cmd_rx_filter(adapter, BE_IF_EN_FLAGS, ON);
+       if (status)
+               return status;
+
+       /* 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);
+               if (status)
+                       return status;
+       }
+
+       if (adapter->vlans_added)
+               be_vid_config(adapter);
+
+       be_set_rx_mode(adapter->netdev);
+
+       return 0;
+}
+
 static int be_open(struct net_device *netdev)
 {
        struct be_adapter *adapter = netdev_priv(netdev);
@@ -3490,6 +3547,10 @@ static int be_open(struct net_device *netdev)
        if (status)
                goto err;
 
+       status = be_enable_if_filters(adapter);
+       if (status)
+               goto err;
+
        status = be_irq_register(adapter);
        if (status)
                goto err;
@@ -3686,16 +3747,6 @@ static void be_cancel_err_detection(struct be_adapter *adapter)
        }
 }
 
-static void be_mac_clear(struct be_adapter *adapter)
-{
-       if (adapter->pmac_id) {
-               be_cmd_pmac_del(adapter, adapter->if_handle,
-                               adapter->pmac_id[0], 0);
-               kfree(adapter->pmac_id);
-               adapter->pmac_id = NULL;
-       }
-}
-
 #ifdef CONFIG_BE2NET_VXLAN
 static void be_disable_vxlan_offloads(struct be_adapter *adapter)
 {
@@ -3770,8 +3821,8 @@ static int be_clear(struct be_adapter *adapter)
 #ifdef CONFIG_BE2NET_VXLAN
        be_disable_vxlan_offloads(adapter);
 #endif
-       /* delete the primary mac along with the uc-mac list */
-       be_mac_clear(adapter);
+       kfree(adapter->pmac_id);
+       adapter->pmac_id = NULL;
 
        be_cmd_if_destroy(adapter, adapter->if_handle,  0);
 
@@ -3782,25 +3833,11 @@ static int be_clear(struct be_adapter *adapter)
        return 0;
 }
 
-static int be_if_create(struct be_adapter *adapter, u32 *if_handle,
-                       u32 cap_flags, u32 vf)
-{
-       u32 en_flags;
-
-       en_flags = BE_IF_FLAGS_UNTAGGED | BE_IF_FLAGS_BROADCAST |
-                  BE_IF_FLAGS_MULTICAST | BE_IF_FLAGS_PASS_L3L4_ERRORS |
-                  BE_IF_FLAGS_RSS | BE_IF_FLAGS_DEFQ_RSS;
-
-       en_flags &= cap_flags;
-
-       return be_cmd_if_create(adapter, cap_flags, en_flags, if_handle, vf);
-}
-
 static int be_vfs_if_create(struct be_adapter *adapter)
 {
        struct be_resources res = {0};
+       u32 cap_flags, en_flags, vf;
        struct be_vf_cfg *vf_cfg;
-       u32 cap_flags, vf;
        int status;
 
        /* If a FW profile exists, then cap_flags are updated */
@@ -3821,8 +3858,12 @@ static int be_vfs_if_create(struct be_adapter *adapter)
                        }
                }
 
-               status = be_if_create(adapter, &vf_cfg->if_handle,
-                                     cap_flags, vf + 1);
+               en_flags = cap_flags & (BE_IF_FLAGS_UNTAGGED |
+                                       BE_IF_FLAGS_BROADCAST |
+                                       BE_IF_FLAGS_MULTICAST |
+                                       BE_IF_FLAGS_PASS_L3L4_ERRORS);
+               status = be_cmd_if_create(adapter, cap_flags, en_flags,
+                                         &vf_cfg->if_handle, vf + 1);
                if (status)
                        return status;
        }
@@ -4194,15 +4235,8 @@ static int be_mac_setup(struct be_adapter *adapter)
 
                memcpy(adapter->netdev->dev_addr, mac, ETH_ALEN);
                memcpy(adapter->netdev->perm_addr, mac, ETH_ALEN);
-       } else {
-               /* Maybe the HW was reset; dev_addr must be re-programmed */
-               memcpy(mac, adapter->netdev->dev_addr, ETH_ALEN);
        }
 
-       /* For BE3-R VFs, the PF programs the initial MAC address */
-       if (!(BEx_chip(adapter) && be_virtfn(adapter)))
-               be_cmd_pmac_add(adapter, mac, adapter->if_handle,
-                               &adapter->pmac_id[0], 0);
        return 0;
 }
 
@@ -4342,6 +4376,7 @@ static int be_func_init(struct be_adapter *adapter)
 static int be_setup(struct be_adapter *adapter)
 {
        struct device *dev = &adapter->pdev->dev;
+       u32 en_flags;
        int status;
 
        status = be_func_init(adapter);
@@ -4364,8 +4399,11 @@ static int be_setup(struct be_adapter *adapter)
        if (status)
                goto err;
 
-       status = be_if_create(adapter, &adapter->if_handle,
-                             be_if_cap_flags(adapter), 0);
+       /* will enable all the needed filter flags in be_open() */
+       en_flags = BE_IF_FLAGS_RSS | BE_IF_FLAGS_DEFQ_RSS;
+       en_flags = en_flags & be_if_cap_flags(adapter);
+       status = be_cmd_if_create(adapter, be_if_cap_flags(adapter), en_flags,
+                                 &adapter->if_handle, 0);
        if (status)
                goto err;
 
@@ -4391,11 +4429,6 @@ static int be_setup(struct be_adapter *adapter)
                dev_err(dev, "Please upgrade firmware to version >= 4.0\n");
        }
 
-       if (adapter->vlans_added)
-               be_vid_config(adapter);
-
-       be_set_rx_mode(adapter->netdev);
-
        status = be_cmd_set_flow_control(adapter, adapter->tx_fc,
                                         adapter->rx_fc);
        if (status)