diff options
| author | Fabrice Gasnier <fabrice.gasnier@st.com> | 2016-02-29 14:27:34 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-02 14:21:32 -0500 |
| commit | c1fa3212be5503d802a5c4c451dd4e673fdc603a (patch) | |
| tree | df0200388853f5d98b595c1ed34e82565d89666d /drivers/net/ethernet/stmicro/stmmac/enh_desc.c | |
| parent | 96951366ce8546662de56f58a3885b94326f9670 (diff) | |
stmmac: merge get_rx_owner into rx_status routine.
The RDES0 register can be read several times while doing RX of a
packet.
This patch slightly improves RX path performance by reading rdes0
once for two operation: check rx owner, get rx status bits.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-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/enh_desc.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/enh_desc.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c index 716b80740b58..1a2fce988548 100644 --- a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c +++ b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c @@ -186,6 +186,9 @@ static int enh_desc_get_rx_status(void *data, struct stmmac_extra_stats *x, unsigned int rdes0 = p->des0; int ret = good_frame; + if (unlikely(rdes0 & RDES0_OWN)) + return dma_own; + if (unlikely(rdes0 & RDES0_ERROR_SUMMARY)) { if (unlikely(rdes0 & RDES0_DESCRIPTOR_ERROR)) { x->rx_desc++; @@ -272,11 +275,6 @@ static int enh_desc_get_tx_owner(struct dma_desc *p) return (p->des0 & ETDES0_OWN) >> 31; } -static int enh_desc_get_rx_owner(struct dma_desc *p) -{ - return (p->des0 & RDES0_OWN) >> 31; -} - static void enh_desc_set_tx_owner(struct dma_desc *p) { p->des0 |= ETDES0_OWN; @@ -402,7 +400,6 @@ const struct stmmac_desc_ops enh_desc_ops = { .init_rx_desc = enh_desc_init_rx_desc, .init_tx_desc = enh_desc_init_tx_desc, .get_tx_owner = enh_desc_get_tx_owner, - .get_rx_owner = enh_desc_get_rx_owner, .release_tx_desc = enh_desc_release_tx_desc, .prepare_tx_desc = enh_desc_prepare_tx_desc, .clear_tx_ic = enh_desc_clear_tx_ic, |