diff options
| author | Giuseppe Cavallaro <peppe.cavallaro@st.com> | 2016-02-29 16:27:31 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-02 22:21:31 +0300 |
| commit | 553e2ab3130e9c3d234bee0c80a2a1e5057c8f9a (patch) | |
| tree | dd5dba3def9765fea5f314e97023e17dae1bf08f /drivers/net/ethernet/stmicro/stmmac/ring_mode.c | |
| parent | e3ad57c96715df2989ce6c18e58faf2913b305cb (diff) | |
| download | linux-553e2ab3130e9c3d234bee0c80a2a1e5057c8f9a.tar.xz | |
stmmac: add length field to dma data
Currently, the code pulls out the length field when
unmapping a buffer directly from the descriptor. This will result
in an uncached read to a dma_alloc_coherent() region. There is no
need to do this, so this patch simply puts the value directly into
a data structure which will hit the cache.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/ring_mode.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/ring_mode.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/ring_mode.c b/drivers/net/ethernet/stmicro/stmmac/ring_mode.c index 4358a87fbc6e..cfc2f24ba08b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/ring_mode.c +++ b/drivers/net/ethernet/stmicro/stmmac/ring_mode.c @@ -56,6 +56,8 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum) return -1; priv->tx_skbuff_dma[entry].buf = desc->des2; + priv->tx_skbuff_dma[entry].len = bmax; + desc->des3 = desc->des2 + BUF_SIZE_4KiB; priv->hw->desc->prepare_tx_desc(desc, 1, bmax, csum, STMMAC_RING_MODE); @@ -73,6 +75,8 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum) if (dma_mapping_error(priv->device, desc->des2)) return -1; priv->tx_skbuff_dma[entry].buf = desc->des2; + priv->tx_skbuff_dma[entry].len = len; + desc->des3 = desc->des2 + BUF_SIZE_4KiB; priv->hw->desc->prepare_tx_desc(desc, 0, len, csum, STMMAC_RING_MODE); @@ -84,6 +88,7 @@ static int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum) if (dma_mapping_error(priv->device, desc->des2)) return -1; priv->tx_skbuff_dma[entry].buf = desc->des2; + priv->tx_skbuff_dma[entry].len = nopaged_len; desc->des3 = desc->des2 + BUF_SIZE_4KiB; priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len, csum, STMMAC_RING_MODE); |