diff options
| author | Giuseppe CAVALLARO <peppe.cavallaro@st.com> | 2013-03-26 04:43:06 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-26 12:53:36 -0400 |
| commit | c24602ef86649376e9d71ea808cd877e414d340b (patch) | |
| tree | 3bf58e08f64c7a01b191eab5927886ccce77045c /drivers/net/ethernet/stmicro/stmmac/stmmac.h | |
| parent | 4a7d666a7202744af32d4da31fb52857b7d86850 (diff) | |
stmmac: support extend descriptors
This patch is to support the extend descriptors available
in the chips newer than the 3.50.
In case of the extend descriptors cannot be supported,
at runtime, the driver will continue to work using the old style.
In detail, this support extends the main descriptor structure
adding new descriptors: 4, 5, 6, 7. The desc4 gives us extra
information about the received ethernet payload when it is
carrying PTP packets or TCP/UDP/ICMP over IP packets.
The descriptors 6 and 7 are used for saving HW L/H timestamps (PTP).
V2: this new version removes the Koption added in the first implementation
because all the checks now to verify if the extended descriptors are
actually supported happen at probe time.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@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 | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index e5f2f333616b..9637d3e86af9 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -34,7 +34,8 @@ struct stmmac_priv { /* Frequently used values are kept adjacent for cache effect */ - struct dma_desc *dma_tx ____cacheline_aligned; + struct dma_desc *dma_tx ____cacheline_aligned; /* Basic TX desc */ + struct dma_extended_desc *dma_etx; /* Extended TX descriptor */ dma_addr_t dma_tx_phy; struct sk_buff **tx_skbuff; unsigned int cur_tx; @@ -42,7 +43,8 @@ struct stmmac_priv { unsigned int dma_tx_size; int tx_coalesce; - struct dma_desc *dma_rx ; + struct dma_desc *dma_rx; /* Basic RX descriptor */ + struct dma_extended_desc *dma_erx; /* Extended RX descriptor */ unsigned int cur_rx; unsigned int dirty_rx; struct sk_buff **rx_skbuff; @@ -94,6 +96,7 @@ struct stmmac_priv { int use_riwt; u32 rx_riwt; unsigned int mode; + int extend_desc; }; extern int phyaddr; |