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Date: Fri, 23 Feb 2018 17:20:32 -0800
From: Vinicius Costa Gomes <vinicius.gomes@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: Vinicius Costa Gomes <vinicius.gomes@...el.com>,
jeffrey.t.kirsher@...el.com, netdev@...r.kernel.org,
jesus.sanchez-palencia@...el.com
Subject: [next-queue PATCH 4/8] igb: Add support for MAC address filters specifying source addresses
Makes it possible to direct packets to queues based on their source
address. Documents the expected usage of the 'flags' parameter.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@...el.com>
---
drivers/net/ethernet/intel/igb/e1000_defines.h | 1 +
drivers/net/ethernet/intel/igb/igb.h | 1 +
drivers/net/ethernet/intel/igb/igb_main.c | 35 +++++++++++++++++++-------
3 files changed, 28 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/intel/igb/e1000_defines.h b/drivers/net/ethernet/intel/igb/e1000_defines.h
index 573bf177fd08..c6f552de30dd 100644
--- a/drivers/net/ethernet/intel/igb/e1000_defines.h
+++ b/drivers/net/ethernet/intel/igb/e1000_defines.h
@@ -490,6 +490,7 @@
* manageability enabled, allowing us room for 15 multicast addresses.
*/
#define E1000_RAH_AV 0x80000000 /* Receive descriptor valid */
+#define E1000_RAH_ASEL_SRC_ADDR 0x00010000
#define E1000_RAH_QSEL_ENABLE 0x10000000
#define E1000_RAL_MAC_ADDR_LEN 4
#define E1000_RAH_MAC_ADDR_LEN 2
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 1c6b8d9176a8..d5cd5f6708d9 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -472,6 +472,7 @@ struct igb_mac_addr {
#define IGB_MAC_STATE_DEFAULT 0x1
#define IGB_MAC_STATE_IN_USE 0x2
+#define IGB_MAC_STATE_SRC_ADDR 0x4
/* board specific private data structure */
struct igb_adapter {
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 543aa99892eb..db66b697fe3b 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -6837,8 +6837,13 @@ static void igb_set_default_mac_filter(struct igb_adapter *adapter)
igb_rar_set_index(adapter, 0);
}
+/* 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 IGB_MAC_STATE_SRC_ADDR can be used.
+ */
static int igb_add_mac_filter(struct igb_adapter *adapter, const u8 *addr,
- const u8 queue)
+ const u8 queue, const u8 flags)
{
struct e1000_hw *hw = &adapter->hw;
int rar_entries = hw->mac.rar_entry_count -
@@ -6858,7 +6863,7 @@ static int igb_add_mac_filter(struct igb_adapter *adapter, const u8 *addr,
ether_addr_copy(adapter->mac_table[i].addr, addr);
adapter->mac_table[i].queue = queue;
- adapter->mac_table[i].state |= IGB_MAC_STATE_IN_USE;
+ adapter->mac_table[i].state |= (IGB_MAC_STATE_IN_USE | flags);
igb_rar_set_index(adapter, i);
return i;
@@ -6867,8 +6872,14 @@ static int igb_add_mac_filter(struct igb_adapter *adapter, const u8 *addr,
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
+ * IGB_MAC_STATE_SRC_ADDR can be used.
+ */
static int igb_del_mac_filter(struct igb_adapter *adapter, const u8 *addr,
- const u8 queue)
+ const u8 queue, const u8 flags)
{
struct e1000_hw *hw = &adapter->hw;
int rar_entries = hw->mac.rar_entry_count -
@@ -6883,14 +6894,15 @@ static int igb_del_mac_filter(struct igb_adapter *adapter, const u8 *addr,
* for the VF MAC addresses.
*/
for (i = 0; i < rar_entries; i++) {
- if (!(adapter->mac_table[i].state & IGB_MAC_STATE_IN_USE))
+ if (!(adapter->mac_table[i].state &
+ (IGB_MAC_STATE_IN_USE | flags)))
continue;
if (adapter->mac_table[i].queue != queue)
continue;
if (!ether_addr_equal(adapter->mac_table[i].addr, addr))
continue;
- adapter->mac_table[i].state &= ~IGB_MAC_STATE_IN_USE;
+ adapter->mac_table[i].state &= ~(IGB_MAC_STATE_IN_USE | flags);
memset(adapter->mac_table[i].addr, 0, ETH_ALEN);
adapter->mac_table[i].queue = 0;
@@ -6906,7 +6918,8 @@ static int igb_uc_sync(struct net_device *netdev, const unsigned char *addr)
struct igb_adapter *adapter = netdev_priv(netdev);
int ret;
- ret = igb_add_mac_filter(adapter, addr, adapter->vfs_allocated_count);
+ ret = igb_add_mac_filter(adapter, addr,
+ adapter->vfs_allocated_count, 0);
return min_t(int, ret, 0);
}
@@ -6915,7 +6928,7 @@ static int igb_uc_unsync(struct net_device *netdev, const unsigned char *addr)
{
struct igb_adapter *adapter = netdev_priv(netdev);
- igb_del_mac_filter(adapter, addr, adapter->vfs_allocated_count);
+ igb_del_mac_filter(adapter, addr, adapter->vfs_allocated_count, 0);
return 0;
}
@@ -6937,7 +6950,8 @@ static int igb_set_vf_mac_filter(struct igb_adapter *adapter, const int vf,
if (entry->vf == vf) {
entry->vf = -1;
entry->free = true;
- igb_del_mac_filter(adapter, entry->vf_mac, vf);
+ igb_del_mac_filter(adapter,
+ entry->vf_mac, vf, 0);
}
}
break;
@@ -6968,7 +6982,7 @@ static int igb_set_vf_mac_filter(struct igb_adapter *adapter, const int vf,
entry->vf = vf;
ether_addr_copy(entry->vf_mac, addr);
- ret = igb_add_mac_filter(adapter, addr, vf);
+ ret = igb_add_mac_filter(adapter, addr, vf, 0);
ret = min_t(int, ret, 0);
} else {
ret = -ENOSPC;
@@ -8743,6 +8757,9 @@ static void igb_rar_set_index(struct igb_adapter *adapter, u32 index)
if (is_valid_ether_addr(addr))
rar_high |= E1000_RAH_AV;
+ if (adapter->mac_table[index].state & IGB_MAC_STATE_SRC_ADDR)
+ rar_high |= E1000_RAH_ASEL_SRC_ADDR;
+
switch (hw->mac.type) {
case e1000_82575:
case e1000_i210:
--
2.16.2
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