be2net: fix a Tx stall bug caused by a specific ipv6 packet
The ASIC could lockup in the transmit path when it tries
to insert VLAN in a specific ipv6 packet.
1) Identify the packet which can cause this.
2) Check if the firmware provides a workaround to prevent this.
3) If workaround is not present, drop the packet.
4) If the firmware provides a workaround, insert the VLAN tag in the
packet and inform the firmware to skip further VLAN insertions.
Signed-off-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.c b/drivers/net/ethernet/emulex/benet/be_cmds.c
index 3c9b4f1..ce5af9b 100644
--- a/drivers/net/ethernet/emulex/benet/be_cmds.c
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.c
@@ -263,6 +263,27 @@
}
}
+static void be_async_dbg_evt_process(struct be_adapter *adapter,
+ u32 trailer, struct be_mcc_compl *cmp)
+{
+ u8 event_type = 0;
+ struct be_async_event_qnq *evt = (struct be_async_event_qnq *) cmp;
+
+ event_type = (trailer >> ASYNC_TRAILER_EVENT_TYPE_SHIFT) &
+ ASYNC_TRAILER_EVENT_TYPE_MASK;
+
+ switch (event_type) {
+ case ASYNC_DEBUG_EVENT_TYPE_QNQ:
+ if (evt->valid)
+ adapter->qnq_vid = le16_to_cpu(evt->vlan_tag);
+ adapter->flags |= BE_FLAGS_QNQ_ASYNC_EVT_RCVD;
+ break;
+ default:
+ dev_warn(&adapter->pdev->dev, "Unknown debug event\n");
+ break;
+ }
+}
+
static inline bool is_link_state_evt(u32 trailer)
{
return ((trailer >> ASYNC_TRAILER_EVENT_CODE_SHIFT) &
@@ -277,6 +298,13 @@
ASYNC_EVENT_CODE_GRP_5);
}
+static inline bool is_dbg_evt(u32 trailer)
+{
+ return (((trailer >> ASYNC_TRAILER_EVENT_CODE_SHIFT) &
+ ASYNC_TRAILER_EVENT_CODE_MASK) ==
+ ASYNC_EVENT_CODE_QNQ);
+}
+
static struct be_mcc_compl *be_mcc_compl_get(struct be_adapter *adapter)
{
struct be_queue_info *mcc_cq = &adapter->mcc_obj.cq;
@@ -325,6 +353,9 @@
else if (is_grp5_evt(compl->flags))
be_async_grp5_evt_process(adapter,
compl->flags, compl);
+ else if (is_dbg_evt(compl->flags))
+ be_async_dbg_evt_process(adapter,
+ compl->flags, compl);
} else if (compl->flags & CQE_FLAGS_COMPLETED_MASK) {
status = be_mcc_compl_process(adapter, compl);
atomic_dec(&mcc_obj->q.used);
@@ -1022,6 +1053,7 @@
/* Subscribe to Link State and Group 5 Events(bits 1 and 5 set) */
req->async_event_bitmap[0] = cpu_to_le32(0x00000022);
+ req->async_event_bitmap[0] |= cpu_to_le32(1 << ASYNC_EVENT_CODE_QNQ);
be_dws_cpu_to_le(ctxt, sizeof(req->context));
be_cmd_page_addrs_prepare(req->pages, ARRAY_SIZE(req->pages), q_mem);