35  *                                  Implemented IP/TCP/UDP checksum task offloading
1077 /* IP checksum error flag */  in rtl8139_do_receive()
1926 /* IP checksum offload flag */  in rtl8139_cplus_transmit_one()
2072             /* Large enough for Ethernet and IP headers? */  in rtl8139_cplus_transmit_one()
2077             /* ip packet header */  in rtl8139_cplus_transmit_one()
2078             struct ip_header *ip = NULL;  in rtl8139_cplus_transmit_one()  local
2092             DPRINTF("+++ C+ mode has IP packet\n");  in rtl8139_cplus_transmit_one()
2102             ip = (struct ip_header*)eth_payload_data;  in rtl8139_cplus_transmit_one()
2104             if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) {  in rtl8139_cplus_transmit_one()
2105                 DPRINTF("+++ C+ mode packet has bad IP version %d "  in rtl8139_cplus_transmit_one()
2106                     "expected %d\n", IP_HEADER_VERSION(ip),  in rtl8139_cplus_transmit_one()
2111             hlen = IP_HDR_GET_LEN(ip);  in rtl8139_cplus_transmit_one()
2116             ip_protocol = ip->ip_p;  in rtl8139_cplus_transmit_one()
2118             ip_data_len = be16_to_cpu(ip->ip_len);  in rtl8139_cplus_transmit_one()
2126                 DPRINTF("+++ C+ mode need IP checksum\n");  in rtl8139_cplus_transmit_one()
2128                 ip->ip_sum = 0;  in rtl8139_cplus_transmit_one()
2129                 ip->ip_sum = ip_checksum(ip, hlen);  in rtl8139_cplus_transmit_one()
2130                 DPRINTF("+++ C+ mode IP header len=%d checksum=%04x\n",  in rtl8139_cplus_transmit_one()
2131                     hlen, ip->ip_sum);  in rtl8139_cplus_transmit_one()
2147                 DPRINTF("+++ C+ mode offloaded task TSO IP data %d "  in rtl8139_cplus_transmit_one()
2153                 /* maximum IP header length is 60 bytes */  in rtl8139_cplus_transmit_one()
2156                 /* save IP header template; data area is used in tcp checksum calculation */  in rtl8139_cplus_transmit_one()
2175                 DPRINTF("+++ C+ mode TSO IP data len %d TCP hlen %d TCP "  in rtl8139_cplus_transmit_one()
2178                 /* note the cycle below overwrites IP header data,  in rtl8139_cplus_transmit_one()
2198                     /* copy IP source and destination fields */  in rtl8139_cplus_transmit_one()
2230                     /* restore IP header */  in rtl8139_cplus_transmit_one()
2233                     /* set IP data length and recalculate IP checksum */  in rtl8139_cplus_transmit_one()
2234                     ip->ip_len = cpu_to_be16(hlen + tcp_hlen + chunk_size);  in rtl8139_cplus_transmit_one()
2236                     /* increment IP id for subsequent frames */  in rtl8139_cplus_transmit_one()
2237 …                  ip->ip_id = cpu_to_be16(tcp_send_offset/large_send_mss + be16_to_cpu(ip->ip_id));  in rtl8139_cplus_transmit_one()
2239                     ip->ip_sum = 0;  in rtl8139_cplus_transmit_one()
2240                     ip->ip_sum = ip_checksum(eth_payload_data, hlen);  in rtl8139_cplus_transmit_one()
2241                     DPRINTF("+++ C+ mode TSO IP header len=%d "  in rtl8139_cplus_transmit_one()
2242                         "checksum=%04x\n", hlen, ip->ip_sum);  in rtl8139_cplus_transmit_one()
2262                 /* maximum IP header length is 60 bytes */  in rtl8139_cplus_transmit_one()
2270                 /* copy IP source and destination fields */  in rtl8139_cplus_transmit_one()
2314                 /* restore IP header */  in rtl8139_cplus_transmit_one()