cxgb4: Free completed tx skbs promptly

Description of problem:
The NIC card is not reporting back to the driver the transmitted skbs,
so they get stuck in the TX ring causing issues with reference
counters in other kernel components.

Developed a new Automatic Egress Queue Update firmware facility to slowly tick
through Egress Queues and send back any outstanding CIDX Updates which are
laying around.

Based on original work by Casey Leedom <leedom@chelsio.com>

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index b0bba32d69d5dfd51eb56cfa6a6e9d5d63f5fe62..d22d728d4e5cb748321d9c86c4ad473a814d0831 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -2303,7 +2303,8 @@ int t4_sge_alloc_eth_txq(struct adapter *adap, struct sge_eth_txq *txq,
                            FW_EQ_ETH_CMD_PFN(adap->fn) | FW_EQ_ETH_CMD_VFN(0));
        c.alloc_to_len16 = htonl(FW_EQ_ETH_CMD_ALLOC |
                                 FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c));
-       c.viid_pkd = htonl(FW_EQ_ETH_CMD_VIID(pi->viid));
+       c.viid_pkd = htonl(FW_EQ_ETH_CMD_AUTOEQUEQE |
+                          FW_EQ_ETH_CMD_VIID(pi->viid));
        c.fetchszm_to_iqid = htonl(FW_EQ_ETH_CMD_HOSTFCMODE(2) |
                                   FW_EQ_ETH_CMD_PCIECHN(pi->tx_chan) |
                                   FW_EQ_ETH_CMD_FETCHRO(1) |

diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
index 0549170d7e2ed2b60f68322b4ef44887471bbc52..5f2729ebadbe14c4d6c1e56fcc29d078380db437 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
@@ -1227,6 +1227,7 @@ struct fw_eq_eth_cmd {
 #define FW_EQ_ETH_CMD_CIDXFTHRESH(x) ((x) << 16)
 #define FW_EQ_ETH_CMD_EQSIZE(x) ((x) << 0)
 
+#define FW_EQ_ETH_CMD_AUTOEQUEQE (1U << 30)
 #define FW_EQ_ETH_CMD_VIID(x) ((x) << 16)
 
 struct fw_eq_ctrl_cmd {

diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
index bdfa80ca5e317cee72c925a4112bdeaaf2551799..a5fb9493dee826563561072185d85ccc46513337 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/sge.c
@@ -2250,7 +2250,8 @@ int t4vf_sge_alloc_eth_txq(struct adapter *adapter, struct sge_eth_txq *txq,
        cmd.alloc_to_len16 = cpu_to_be32(FW_EQ_ETH_CMD_ALLOC |
                                         FW_EQ_ETH_CMD_EQSTART |
                                         FW_LEN16(cmd));
-       cmd.viid_pkd = cpu_to_be32(FW_EQ_ETH_CMD_VIID(pi->viid));
+       cmd.viid_pkd = cpu_to_be32(FW_EQ_ETH_CMD_AUTOEQUEQE |
+                                  FW_EQ_ETH_CMD_VIID(pi->viid));
        cmd.fetchszm_to_iqid =
                cpu_to_be32(FW_EQ_ETH_CMD_HOSTFCMODE(SGE_HOSTFCMODE_STPG) |
                            FW_EQ_ETH_CMD_PCIECHN(pi->port_id) |