[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1400518800-6111-9-git-send-email-ezequiel.garcia@free-electrons.com>
Date: Mon, 19 May 2014 13:59:59 -0300
From: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
To: <netdev@...r.kernel.org>, David Miller <davem@...emloft.net>,
Eric Dumazet <eric.dumazet@...il.com>
Cc: Willy Tarreau <w@....eu>,
Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
Gregory Clement <gregory.clement@...e-electrons.com>,
Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
Tawfik Bayouk <tawfik@...vell.com>,
Lior Amsalem <alior@...vell.com>,
Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
Subject: [PATCH 8/9] net: mv643xx_eth: Use dma_map_single() to map the skb fragments
Using dma_map_single() instead of skb_frag_dma_map() allows to unmap
all the descriptors using dma_unmap_single(). This change allows
to introduce software TSO in a less intrusive way.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
---
drivers/net/ethernet/marvell/mv643xx_eth.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index 01fde2c..8854751 100644
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -732,8 +732,10 @@ static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
skb_frag_t *this_frag;
int tx_index;
struct tx_desc *desc;
+ void *addr;
this_frag = &skb_shinfo(skb)->frags[frag];
+ addr = page_address(this_frag->page.p) + this_frag->page_offset;
tx_index = txq->tx_curr_desc++;
if (txq->tx_curr_desc == txq->tx_ring_size)
txq->tx_curr_desc = 0;
@@ -753,10 +755,8 @@ static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb)
desc->l4i_chk = 0;
desc->byte_cnt = skb_frag_size(this_frag);
- desc->buf_ptr = skb_frag_dma_map(mp->dev->dev.parent,
- this_frag, 0,
- skb_frag_size(this_frag),
- DMA_TO_DEVICE);
+ desc->buf_ptr = dma_map_single(mp->dev->dev.parent, addr,
+ desc->byte_cnt, DMA_TO_DEVICE);
}
}
@@ -927,14 +927,8 @@ static int txq_reclaim(struct tx_queue *txq, int budget, int force)
mp->dev->stats.tx_errors++;
}
- if (cmd_sts & TX_FIRST_DESC) {
- dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr,
- desc->byte_cnt, DMA_TO_DEVICE);
- } else {
- dma_unmap_page(mp->dev->dev.parent, desc->buf_ptr,
- desc->byte_cnt, DMA_TO_DEVICE);
- }
-
+ dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr,
+ desc->byte_cnt, DMA_TO_DEVICE);
dev_kfree_skb(skb);
}
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists