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| author | Deepak SIKRI <deepak.sikri@st.com> | 2012-04-04 04:33:21 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-04-04 18:39:23 -0400 |
| commit | 38912bdbde5f39aa00dfc6228ef580ff79b46bd3 (patch) | |
| tree | edd34f950438e75d8b47a71c832830e934117b77 /drivers/net/ethernet/stmicro/stmmac/enh_desc.c | |
| parent | 55f9a4d6facb35198ddb88a8fe21ca2ee753af7a (diff) | |
| download | linux-38912bdbde5f39aa00dfc6228ef580ff79b46bd3.tar.gz linux-38912bdbde5f39aa00dfc6228ef580ff79b46bd3.tar.xz | |
stmmac: sanitize the rx coe and add the type-1 csum (v2)
This patch sanities the RX coe and adds the Type-1 Rx checksum offload engine (COE).
So the RX COE can be passed through the platform but can be fixed
at run-time in case of the core has the HW capability register.
Also to support the Type-1 Rx COE the driver must append the
HW checksum at the end of payload in case the Rx checksum
engine was used to offload the HW checksum.
This v2 version also fixes the IPC that has to be enabled and verified.
Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Hacked-by: Giuseppe Cavallaro <peppe.cavallaro@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 | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c index ad1b627f8ec2..2fc8ef95f97a 100644 --- a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c +++ b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c @@ -22,6 +22,7 @@ Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> *******************************************************************************/ +#include <linux/stmmac.h> #include "common.h" #include "descs_com.h" @@ -309,9 +310,17 @@ static void enh_desc_close_tx_desc(struct dma_desc *p) p->des01.etx.interrupt = 1; } -static int enh_desc_get_rx_frame_len(struct dma_desc *p) +static int enh_desc_get_rx_frame_len(struct dma_desc *p, int rx_coe_type) { - return p->des01.erx.frame_length; + /* The type-1 checksum offload engines append the checksum at + * the end of frame and the two bytes of checksum are added in + * the length. + * Adjust for that in the framelen for type-1 checksum offload + * engines. */ + if (rx_coe_type == STMMAC_RX_COE_TYPE1) + return p->des01.erx.frame_length - 2; + else + return p->des01.erx.frame_length; } const struct stmmac_desc_ops enh_desc_ops = { |