diff options
| author | Giuseppe Cavallaro <peppe.cavallaro@st.com> | 2016-02-29 16:27:30 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-02 22:21:31 +0300 |
| commit | e3ad57c96715df2989ce6c18e58faf2913b305cb (patch) | |
| tree | 716a8f7f1662876b3006888c251fff7afc2e0896 /drivers/net/ethernet/stmicro/stmmac/stmmac.h | |
| parent | 293e4365a1adb1d3747dcb7d12a52950e0e232a2 (diff) | |
| download | linux-e3ad57c96715df2989ce6c18e58faf2913b305cb.tar.xz | |
stmmac: review RX/TX ring management
This patch is to rework the ring management now optimized.
The indexes into the ring buffer are always incremented, and
the entry is accessed via doing a modulo to find the "real"
position in the ring.
It is inefficient, modulo is an expensive operation.
The formula [(entry + 1) & (size - 1)] is now adopted on
a ring that is power-of-2 in size.
Then, the number of elements cannot be set by command line but
it is fixed.
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/stmmac.h')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 1f3b33a6c6a8..7ae7c6430a3f 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -54,7 +54,6 @@ struct stmmac_priv { struct sk_buff **tx_skbuff; unsigned int cur_tx; unsigned int dirty_tx; - unsigned int dma_tx_size; u32 tx_count_frames; u32 tx_coal_frames; u32 tx_coal_timer; @@ -71,7 +70,6 @@ struct stmmac_priv { struct sk_buff **rx_skbuff; unsigned int cur_rx; unsigned int dirty_rx; - unsigned int dma_rx_size; unsigned int dma_buf_sz; u32 rx_riwt; int hwts_rx_en; |