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git://nv-tegra.nvidia.com/linux-nv-oot.git
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748fa9c699
- Renamed the directory to oak - Updated the make files to compile the source - Removed unused script ESDP-16549 Bug 3882239 Bug 3824037 Change-Id: I1dee5def85b6e25f88dff999f1051bfe62d5613b Signed-off-by: Sheetal Tigadoli <stigadoli@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2856988 Reviewed-by: Sumeet Gupta <sumeetg@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
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*
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* If you received this File from Marvell, you may opt to use, redistribute and/or
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* modify this File in accordance with the terms and conditions of the General
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* Public License Version 2, June 1991 (the "GPL License"), a copy of which is
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* available along with the File in the license.txt file or by writing to the Free
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* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
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* on the worldwide web at http://www.gnu.org/licenses/gpl.txt.
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
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* DISCLAIMED. The GPL License provides additional details about this warranty
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* disclaimer.
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*
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*/
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#include "oak_net.h"
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#include "oak_debug.h"
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#include "oak_chksum.h"
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/* Name : oak_chksum_get_config
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* Returns : netdev_features_t
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* Parameters : void
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* Description : This function provides Oak Hardware's Checksum Offload
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* capabilities
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*/
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netdev_features_t oak_chksum_get_config(void)
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{
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netdev_features_t features = OAK_CHKSUM_TYPE;
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/* Oak HW Supports L3 & L3 Checksum Offload and Freagmented frame,
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* so scatter gather need to be enabled.
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*/
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features |= NETIF_F_SG;
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return features;
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}
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/* Name : oak_chksum_get_tx_config
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* Returns : u32
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* Parameters : struct sk_buff *skb, u32 *cs_l3, u32 *cs_l4
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* Description : This function returns the Checksum Offload configuration
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* for the transmit frame.
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*/
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u32 oak_chksum_get_tx_config(struct sk_buff *skb, u32 *cs_l3,
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u32 *cs_l4)
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{
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u32 retval = 0;
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int prot;
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*cs_l3 = 0;
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*cs_l4 = 0;
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if (skb->ip_summed == CHECKSUM_PARTIAL) {
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prot = oak_net_skb_tx_protocol_type(skb);
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if (prot == L3_L4_CHKSUM) {
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*cs_l3 = 1;
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*cs_l4 = 1;
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} else if (prot == L3_CHKSUM) {
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*cs_l3 = 1;
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*cs_l4 = 0;
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} else {
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/* Setting cs_l3 & cs_l4 to zero is done in error case after
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* this function returns.
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*/
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retval = 1;
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}
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} else {
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retval = 1;
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}
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return retval;
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}
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/* Name : oak_chksum_get_rx_config
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* Returns : u32
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* Parameters : struct oak_rx_chan_t *rxc, struct oak_rxs_t *rsr
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* Description : This function returns the current receive frames
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* checksum state.
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*/
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int oak_chksum_get_rx_config(oak_rx_chan_t *rxc, oak_rxs_t *rsr)
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{
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int retval = CHECKSUM_NONE;
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if (rsr->vlan == 1)
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++rxc->stat.rx_vlan;
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if (rsr->l3_ipv4 == 1 || rsr->l3_ipv6 == 1) {
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if (rsr->l4_prot == OAK_TCP_IP_FRAME ||
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rsr->l4_prot == OAK_TCP_UDP_FRAME) {
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if (rsr->l4_chk_ok == 1) {
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rxc->stat.rx_l4p_ok++;
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retval = CHECKSUM_UNNECESSARY;
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}
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} else if (rsr->l3_ipv4 == 1 && rsr->ipv4_hdr_ok == 1) {
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/*
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* Linux documentation for CHECKSUM_PARTIAL
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* in include/linux/skbuff.h this state may occur on a packet
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* received directly from another Linux OS,
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* e.g., a virtualized Linux kernel on the same host,
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* or it may be set in the input path in GRO or remote checksum
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* offload.
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* As per the discussion with the Linux kernel netdev forum
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* setting ip_summed to PARTIAL on receive is only valid
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* for software/virtual devices, never real HW.
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* For a frame where the checksum is not verified by the HW,
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* the flag will be set as CHECKSUM_NONE such that
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* linux netdev layer verifies the same.
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*/
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rxc->stat.rx_ip4_ok++;
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}
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}
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return retval;
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}
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