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authorDeepak SIKRI <deepak.sikri@st.com>2012-04-04 00:33:20 -0400
committerDavid S. Miller <davem@davemloft.net>2012-04-04 18:39:23 -0400
commit55f9a4d6facb35198ddb88a8fe21ca2ee753af7a (patch)
tree7d5117dcf6ec24bb4b501d95992d3ce25725ce4b /include/linux/stmmac.h
parentf142af2e2064546ac470e8690acbd189b3584e67 (diff)
stmmac: Define CSUM offload engine Types
This patch explicitly defines the CSUM offload engine type which need (not mandatory) to be passed from the platform code. STMMAC core supports two check sum offload engine types- Type-1 & Type-2. Also, there are STMMAC cores that do not have the check sum offload capabilities. The behaviour of Type-1 & Type-2 cores related to provision of checksum increases the packet length for Type-1 cores by 2, as the checksum is appended at the end of data packet and the same is made accountable in the DMA status. The STMMAC cores beyond Version-3.5 provide HW interface registers which allows the user to read the HW capabilities, while to support the previous cores the information related to HW capabilities has to be provided from the platform code. The Type-1 cores which do not have the HW register interface need this information. This patch also updates the driver's doc. 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 'include/linux/stmmac.h')
-rw-r--r--include/linux/stmmac.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 172b5e15df2e..a9b4d6cb96e9 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -28,6 +28,10 @@
28 28
29#include <linux/platform_device.h> 29#include <linux/platform_device.h>
30 30
31#define STMMAC_RX_COE_NONE 0
32#define STMMAC_RX_COE_TYPE1 1
33#define STMMAC_RX_COE_TYPE2 2
34
31/* Platfrom data for platform device structure's platform_data field */ 35/* Platfrom data for platform device structure's platform_data field */
32 36
33struct stmmac_mdio_bus_data { 37struct stmmac_mdio_bus_data {
@@ -49,6 +53,7 @@ struct plat_stmmacenet_data {
49 int has_gmac; 53 int has_gmac;
50 int enh_desc; 54 int enh_desc;
51 int tx_coe; 55 int tx_coe;
56 int rx_coe;
52 int bugged_jumbo; 57 int bugged_jumbo;
53 int pmt; 58 int pmt;
54 int force_sf_dma_mode; 59 int force_sf_dma_mode;