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authorSasha Neftin <sasha.neftin@intel.com>2019-09-25 11:58:53 +0300
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2019-10-21 10:22:13 -0700
commit7f839684c5c42f1d36ee0eb21ba751c7b51fa928 (patch)
tree9143fe3efa9532128c08a98b4355bfa24534fb70 /drivers/net/ethernet/intel/igc/igc_main.c
parentf15bb6dde738cc8fa00c24fb89b5456ea3342879 (diff)
downloadlwn-7f839684c5c42f1d36ee0eb21ba751c7b51fa928.tar.gz
lwn-7f839684c5c42f1d36ee0eb21ba751c7b51fa928.zip
igc: Add set_rx_mode support
Add multicast addresses list to the MTA table. Implement basic Rx mode support. Add option for IPv6 address settings. Signed-off-by: Sasha Neftin <sasha.neftin@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igc/igc_main.c')
-rw-r--r--drivers/net/ethernet/intel/igc/igc_main.c181
1 files changed, 181 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 69e70b297e85..7d2f479b57cf 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -795,6 +795,44 @@ static int igc_set_mac(struct net_device *netdev, void *p)
return 0;
}
+/**
+ * igc_write_mc_addr_list - write multicast addresses to MTA
+ * @netdev: network interface device structure
+ *
+ * Writes multicast address list to the MTA hash table.
+ * Returns: -ENOMEM on failure
+ * 0 on no addresses written
+ * X on writing X addresses to MTA
+ **/
+static int igc_write_mc_addr_list(struct net_device *netdev)
+{
+ struct igc_adapter *adapter = netdev_priv(netdev);
+ struct igc_hw *hw = &adapter->hw;
+ struct netdev_hw_addr *ha;
+ u8 *mta_list;
+ int i;
+
+ if (netdev_mc_empty(netdev)) {
+ /* nothing to program, so clear mc list */
+ igc_update_mc_addr_list(hw, NULL, 0);
+ return 0;
+ }
+
+ mta_list = kcalloc(netdev_mc_count(netdev), 6, GFP_ATOMIC);
+ if (!mta_list)
+ return -ENOMEM;
+
+ /* The shared function expects a packed array of only addresses. */
+ i = 0;
+ netdev_for_each_mc_addr(ha, netdev)
+ memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
+
+ igc_update_mc_addr_list(hw, mta_list, i);
+ kfree(mta_list);
+
+ return netdev_mc_count(netdev);
+}
+
static void igc_tx_ctxtdesc(struct igc_ring *tx_ring,
struct igc_tx_buffer *first,
u32 vlan_macip_lens, u32 type_tucmd,
@@ -2518,6 +2556,110 @@ int igc_del_mac_steering_filter(struct igc_adapter *adapter,
IGC_MAC_STATE_QUEUE_STEERING | flags);
}
+/* Add a MAC filter for 'addr' directing matching traffic to 'queue',
+ * 'flags' is used to indicate what kind of match is made, match is by
+ * default for the destination address, if matching by source address
+ * is desired the flag IGC_MAC_STATE_SRC_ADDR can be used.
+ */
+static int igc_add_mac_filter(struct igc_adapter *adapter,
+ const u8 *addr, const u8 queue)
+{
+ struct igc_hw *hw = &adapter->hw;
+ int rar_entries = hw->mac.rar_entry_count;
+ int i;
+
+ if (is_zero_ether_addr(addr))
+ return -EINVAL;
+
+ /* Search for the first empty entry in the MAC table.
+ * Do not touch entries at the end of the table reserved for the VF MAC
+ * addresses.
+ */
+ for (i = 0; i < rar_entries; i++) {
+ if (!igc_mac_entry_can_be_used(&adapter->mac_table[i],
+ addr, 0))
+ continue;
+
+ ether_addr_copy(adapter->mac_table[i].addr, addr);
+ adapter->mac_table[i].queue = queue;
+ adapter->mac_table[i].state |= IGC_MAC_STATE_IN_USE;
+
+ igc_rar_set_index(adapter, i);
+ return i;
+ }
+
+ return -ENOSPC;
+}
+
+/* Remove a MAC filter for 'addr' directing matching traffic to
+ * 'queue', 'flags' is used to indicate what kind of match need to be
+ * removed, match is by default for the destination address, if
+ * matching by source address is to be removed the flag
+ * IGC_MAC_STATE_SRC_ADDR can be used.
+ */
+static int igc_del_mac_filter(struct igc_adapter *adapter,
+ const u8 *addr, const u8 queue)
+{
+ struct igc_hw *hw = &adapter->hw;
+ int rar_entries = hw->mac.rar_entry_count;
+ int i;
+
+ if (is_zero_ether_addr(addr))
+ return -EINVAL;
+
+ /* Search for matching entry in the MAC table based on given address
+ * and queue. Do not touch entries at the end of the table reserved
+ * for the VF MAC addresses.
+ */
+ for (i = 0; i < rar_entries; i++) {
+ if (!(adapter->mac_table[i].state & IGC_MAC_STATE_IN_USE))
+ continue;
+ if (adapter->mac_table[i].state != 0)
+ continue;
+ if (adapter->mac_table[i].queue != queue)
+ continue;
+ if (!ether_addr_equal(adapter->mac_table[i].addr, addr))
+ continue;
+
+ /* When a filter for the default address is "deleted",
+ * we return it to its initial configuration
+ */
+ if (adapter->mac_table[i].state & IGC_MAC_STATE_DEFAULT) {
+ adapter->mac_table[i].state =
+ IGC_MAC_STATE_DEFAULT | IGC_MAC_STATE_IN_USE;
+ adapter->mac_table[i].queue = 0;
+ } else {
+ adapter->mac_table[i].state = 0;
+ adapter->mac_table[i].queue = 0;
+ memset(adapter->mac_table[i].addr, 0, ETH_ALEN);
+ }
+
+ igc_rar_set_index(adapter, i);
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+static int igc_uc_sync(struct net_device *netdev, const unsigned char *addr)
+{
+ struct igc_adapter *adapter = netdev_priv(netdev);
+ int ret;
+
+ ret = igc_add_mac_filter(adapter, addr, adapter->num_rx_queues);
+
+ return min_t(int, ret, 0);
+}
+
+static int igc_uc_unsync(struct net_device *netdev, const unsigned char *addr)
+{
+ struct igc_adapter *adapter = netdev_priv(netdev);
+
+ igc_del_mac_filter(adapter, addr, adapter->num_rx_queues);
+
+ return 0;
+}
+
/**
* igc_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
* @netdev: network interface device structure
@@ -2529,6 +2671,44 @@ int igc_del_mac_steering_filter(struct igc_adapter *adapter,
*/
static void igc_set_rx_mode(struct net_device *netdev)
{
+ struct igc_adapter *adapter = netdev_priv(netdev);
+ struct igc_hw *hw = &adapter->hw;
+ u32 rctl = 0, rlpml = MAX_JUMBO_FRAME_SIZE;
+ int count;
+
+ /* Check for Promiscuous and All Multicast modes */
+ if (netdev->flags & IFF_PROMISC) {
+ rctl |= IGC_RCTL_UPE | IGC_RCTL_MPE;
+ } else {
+ if (netdev->flags & IFF_ALLMULTI) {
+ rctl |= IGC_RCTL_MPE;
+ } else {
+ /* Write addresses to the MTA, if the attempt fails
+ * then we should just turn on promiscuous mode so
+ * that we can at least receive multicast traffic
+ */
+ count = igc_write_mc_addr_list(netdev);
+ if (count < 0)
+ rctl |= IGC_RCTL_MPE;
+ }
+ }
+
+ /* Write addresses to available RAR registers, if there is not
+ * sufficient space to store all the addresses then enable
+ * unicast promiscuous mode
+ */
+ if (__dev_uc_sync(netdev, igc_uc_sync, igc_uc_unsync))
+ rctl |= IGC_RCTL_UPE;
+
+ /* update state of unicast and multicast */
+ rctl |= rd32(IGC_RCTL) & ~(IGC_RCTL_UPE | IGC_RCTL_MPE);
+ wr32(IGC_RCTL, rctl);
+
+#if (PAGE_SIZE < 8192)
+ if (adapter->max_frame_size <= IGC_MAX_FRAME_BUILD_SKB)
+ rlpml = IGC_MAX_FRAME_BUILD_SKB;
+#endif
+ wr32(IGC_RLPML, rlpml);
}
/**
@@ -3982,6 +4162,7 @@ static const struct net_device_ops igc_netdev_ops = {
.ndo_open = igc_open,
.ndo_stop = igc_close,
.ndo_start_xmit = igc_xmit_frame,
+ .ndo_set_rx_mode = igc_set_rx_mode,
.ndo_set_mac_address = igc_set_mac,
.ndo_change_mtu = igc_change_mtu,
.ndo_get_stats = igc_get_stats,