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author | Sathya Perla <sathya.perla@emulex.com> | 2010-12-01 01:04:17 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-12-06 12:59:08 -0800 |
commit | 6464281161e46254ac39505ad41d21dbe7d1738f (patch) | |
tree | a85efd96c46bada5c8226b2a02944295e9bec800 | |
parent | 359a972fae84242efa26b86bf09c3ac3784405ba (diff) | |
download | op-kernel-dev-6464281161e46254ac39505ad41d21dbe7d1738f.zip op-kernel-dev-6464281161e46254ac39505ad41d21dbe7d1738f.tar.gz |
be2net: Handle out of buffer completions for lancer
If Lancer chip does not have posted RX buffers, it posts an RX completion entry
with the same frag_index as the last valid completion. The Error bit is also
set. In BE, a flush completion is indicated with a zero value for num_rcvd in
the completion.
Such completions don't carry any data and are not processed.
This patch refactors code to handle both cases with the same code.
Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | drivers/net/benet/be.h | 4 | ||||
-rw-r--r-- | drivers/net/benet/be_main.c | 55 |
2 files changed, 38 insertions, 21 deletions
diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h index b61a1df..9cab323 100644 --- a/drivers/net/benet/be.h +++ b/drivers/net/benet/be.h @@ -220,7 +220,9 @@ struct be_rx_obj { struct be_rx_stats stats; u8 rss_id; bool rx_post_starved; /* Zero rx frags have been posted to BE */ - u32 cache_line_barrier[16]; + u16 last_frag_index; + u16 rsvd; + u32 cache_line_barrier[15]; }; struct be_vf_cfg { diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c index ea8cf69..0b35e4a 100644 --- a/drivers/net/benet/be_main.c +++ b/drivers/net/benet/be_main.c @@ -911,11 +911,17 @@ static void be_rx_compl_discard(struct be_adapter *adapter, rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp); num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp); - for (i = 0; i < num_rcvd; i++) { - page_info = get_rx_page_info(adapter, rxo, rxq_idx); - put_page(page_info->page); - memset(page_info, 0, sizeof(*page_info)); - index_inc(&rxq_idx, rxq->len); + /* Skip out-of-buffer compl(lancer) or flush compl(BE) */ + if (likely(rxq_idx != rxo->last_frag_index && num_rcvd != 0)) { + + rxo->last_frag_index = rxq_idx; + + for (i = 0; i < num_rcvd; i++) { + page_info = get_rx_page_info(adapter, rxo, rxq_idx); + put_page(page_info->page); + memset(page_info, 0, sizeof(*page_info)); + index_inc(&rxq_idx, rxq->len); + } } } @@ -1016,9 +1022,6 @@ static void be_rx_compl_process(struct be_adapter *adapter, u8 vtm; num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp); - /* Is it a flush compl that has no data */ - if (unlikely(num_rcvd == 0)) - return; skb = netdev_alloc_skb_ip_align(adapter->netdev, BE_HDR_LEN); if (unlikely(!skb)) { @@ -1075,10 +1078,6 @@ static void be_rx_compl_process_gro(struct be_adapter *adapter, u8 pkt_type; num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp); - /* Is it a flush compl that has no data */ - if (unlikely(num_rcvd == 0)) - return; - pkt_size = AMAP_GET_BITS(struct amap_eth_rx_compl, pktsize, rxcp); vlanf = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp); rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp); @@ -1349,7 +1348,7 @@ static void be_rx_q_clean(struct be_adapter *adapter, struct be_rx_obj *rxo) while ((rxcp = be_rx_compl_get(rxo)) != NULL) { be_rx_compl_discard(adapter, rxo, rxcp); be_rx_compl_reset(rxcp); - be_cq_notify(adapter, rx_cq->id, true, 1); + be_cq_notify(adapter, rx_cq->id, false, 1); } /* Then free posted rx buffer that were not used */ @@ -1576,6 +1575,9 @@ static int be_rx_queues_create(struct be_adapter *adapter) adapter->big_page_size = (1 << get_order(rx_frag_size)) * PAGE_SIZE; for_all_rx_queues(adapter, rxo, i) { rxo->adapter = adapter; + /* Init last_frag_index so that the frag index in the first + * completion will never match */ + rxo->last_frag_index = 0xffff; rxo->rx_eq.max_eqd = BE_MAX_EQD; rxo->rx_eq.enable_aic = true; @@ -1697,10 +1699,9 @@ static irqreturn_t be_msix_tx_mcc(int irq, void *dev) return IRQ_HANDLED; } -static inline bool do_gro(struct be_adapter *adapter, struct be_rx_obj *rxo, - struct be_eth_rx_compl *rxcp) +static inline bool do_gro(struct be_rx_obj *rxo, + struct be_eth_rx_compl *rxcp, u8 err) { - int err = AMAP_GET_BITS(struct amap_eth_rx_compl, err, rxcp); int tcp_frame = AMAP_GET_BITS(struct amap_eth_rx_compl, tcpf, rxcp); if (err) @@ -1717,6 +1718,8 @@ static int be_poll_rx(struct napi_struct *napi, int budget) struct be_queue_info *rx_cq = &rxo->cq; struct be_eth_rx_compl *rxcp; u32 work_done; + u16 frag_index, num_rcvd; + u8 err; rxo->stats.rx_polls++; for (work_done = 0; work_done < budget; work_done++) { @@ -1724,10 +1727,22 @@ static int be_poll_rx(struct napi_struct *napi, int budget) if (!rxcp) break; - if (do_gro(adapter, rxo, rxcp)) - be_rx_compl_process_gro(adapter, rxo, rxcp); - else - be_rx_compl_process(adapter, rxo, rxcp); + err = AMAP_GET_BITS(struct amap_eth_rx_compl, err, rxcp); + frag_index = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, + rxcp); + num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, + rxcp); + + /* Skip out-of-buffer compl(lancer) or flush compl(BE) */ + if (likely(frag_index != rxo->last_frag_index && + num_rcvd != 0)) { + rxo->last_frag_index = frag_index; + + if (do_gro(rxo, rxcp, err)) + be_rx_compl_process_gro(adapter, rxo, rxcp); + else + be_rx_compl_process(adapter, rxo, rxcp); + } be_rx_compl_reset(rxcp); } |