From: Netanel Belgazal <netanel@annapurnalabs.com>
To: linux-kernel@vger.kernel.org, davem@davemloft.net,
netdev@vger.kernel.org
Cc: Netanel Belgazal <netanel@annapurnalabs.com>,
dwmw@amazon.com, zorik@annapurnalabs.com, alex@annapurnalabs.com,
saeed@annapurnalabs.com, msw@amazon.com, aliguori@amazon.com,
nafea@annapurnalabs.com
Subject: [PATCH net 12/18] net/ena: refactor skb allocation
Date: Sun, 20 Nov 2016 10:45:41 +0200 [thread overview]
Message-ID: <1479631547-29354-13-git-send-email-netanel@annapurnalabs.com> (raw)
In-Reply-To: <1479631547-29354-1-git-send-email-netanel@annapurnalabs.com>
To increase readability, refactor skb allocation to dedicated function
This change does not impact the performance since the compiler optimize
the code and elimitate the if condition.
Signed-off-by: Netanel Belgazal <netanel@annapurnalabs.com>
---
drivers/net/ethernet/amazon/ena/ena_netdev.c | 46 ++++++++++++++++------------
1 file changed, 27 insertions(+), 19 deletions(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 3bc8f43..b478c61 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -787,6 +787,28 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
return tx_pkts;
}
+static struct sk_buff *ena_alloc_skb(struct ena_ring *rx_ring, bool frags)
+{
+ struct sk_buff *skb;
+
+ if (frags)
+ skb = napi_get_frags(rx_ring->napi);
+ else
+ skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
+ rx_ring->rx_copybreak);
+
+ if (unlikely(!skb)) {
+ u64_stats_update_begin(&rx_ring->syncp);
+ rx_ring->rx_stats.skb_alloc_fail++;
+ u64_stats_update_end(&rx_ring->syncp);
+ netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
+ "Failed to allocate skb. frags: %d\n", frags);
+ return NULL;
+ }
+
+ return skb;
+}
+
static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
struct ena_com_rx_buf_info *ena_bufs,
u32 descs,
@@ -795,8 +817,7 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
struct sk_buff *skb;
struct ena_rx_buffer *rx_info =
&rx_ring->rx_buffer_info[*next_to_clean];
- u32 len;
- u32 buf = 0;
+ u32 len, buf = 0;
void *va;
len = ena_bufs[0].len;
@@ -815,16 +836,9 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
prefetch(va + NET_IP_ALIGN);
if (len <= rx_ring->rx_copybreak) {
- skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
- rx_ring->rx_copybreak);
- if (unlikely(!skb)) {
- u64_stats_update_begin(&rx_ring->syncp);
- rx_ring->rx_stats.skb_alloc_fail++;
- u64_stats_update_end(&rx_ring->syncp);
- netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
- "Failed to allocate skb\n");
+ skb = ena_alloc_skb(rx_ring, false);
+ if (unlikely(!skb))
return NULL;
- }
netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
"rx allocated small packet. len %d. data_len %d\n",
@@ -848,15 +862,9 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
return skb;
}
- skb = napi_get_frags(rx_ring->napi);
- if (unlikely(!skb)) {
- netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
- "Failed allocating skb\n");
- u64_stats_update_begin(&rx_ring->syncp);
- rx_ring->rx_stats.skb_alloc_fail++;
- u64_stats_update_end(&rx_ring->syncp);
+ skb = ena_alloc_skb(rx_ring, true);
+ if (unlikely(!skb))
return NULL;
- }
do {
dma_unmap_page(rx_ring->dev,
--
1.9.1
next prev parent reply other threads:[~2016-11-20 8:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-20 8:45 [PATCH net 00/18] Update ENA driver to version 1.1.2 Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 01/18] net/ena: remove RFS support from device feature list Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 02/18] net/ena: fix queues number calculation Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 03/18] net/ena: use napi_schedule_irqoff when possible Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 04/18] net/ena: reduce the severity of ena printouts Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 05/18] net/ena: add hardware hints capability to the driver Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 06/18] net/ena: fix ethtool RSS flow configuration Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 07/18] net/ena: refactor ena_get_stats64 to be atomic context safe Netanel Belgazal
2016-11-20 10:09 ` kbuild test robot
2016-11-20 18:59 ` Netanel Belgazal
2016-11-21 16:23 ` kbuild test robot
2016-11-20 8:45 ` [PATCH net 08/18] net/ena: change sizeof() argument to be the type pointer Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 09/18] net/ena: change condition for host attribute configuration Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 10/18] net/ena: use READ_ONCE to access completion descriptors Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 11/18] net/ena: fix potential access to freed memory during device reset Netanel Belgazal
2016-11-20 8:45 ` Netanel Belgazal [this message]
2016-11-20 8:45 ` [PATCH net 13/18] net/ena: remove redundant logic in napi callback for busy poll mode Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 14/18] net/ena: add IPv6 extended protocols to ena_admin_flow_hash_proto Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 15/18] net/ena: remove affinity hint from the driver Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 16/18] net/ena: fix error handling when probe fails Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 17/18] net/ena: fix NULL dereference when removing the driver after device reset faild Netanel Belgazal
2016-11-20 8:45 ` [PATCH net 18/18] net/ena: change driver's default timeouts and increase driver version Netanel Belgazal
2016-11-20 15:24 ` [PATCH net 00/18] Update ENA driver to version 1.1.2 David Miller
2016-11-20 18:53 ` Netanel Belgazal
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