[dpdk-dev] 82599 TX IP checksum offloading

chen_lp chen_lp at neusoft.com
Mon Nov 25 07:23:23 CET 2013


Hi,
I want NIC to calculate ip checksum on dpdk-1.5.0,

I have set:
static const struct rte_eth_txconf tx_conf = {
	.tx_thresh = {
		.pthresh = TX_PTHRESH,
		.hthresh = TX_HTHRESH,
		.wthresh = TX_WTHRESH,
	},
	.tx_free_thresh = 0, 
	.tx_rs_thresh = 0, 
	.txq_flags = 0,    
};
this struct is used by int rte_eth_tx_queue_setup(uint8_t port_id, uint16_t tx_queue_id,
				  uint16_t nb_tx_desc, unsigned int socket_id,
				  const struct rte_eth_txconf **tx_conf*);

when constructing the pkt will been sending:
 
mbuf->ol_flags|=(PKT_TX_IP_CKSUM|PKT_RX_IPV4_HDR);                                                                    |~                        
mbuf->pkt.vlan_macip.f.l2_len = sizeof(struct ether_hdr);                                                             |~                        
mbuf->pkt.vlan_macip.f.l3_len = sizeof(struct ipv4_hdr); 


but the NIC not calculate ip checksum,did anyone tell me what's wrong whith it?
by the way,I create multi-queue for tx and rx.


Thanks,
chen_lp

---------------------------------------------------------------------------------------------------
Confidentiality Notice: The information contained in this e-mail and any accompanying attachment(s) 
is intended only for the use of the intended recipient and may be confidential and/or privileged of 
Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader of this communication is 
not the intended recipient, unauthorized use, forwarding, printing,  storing, disclosure or copying 
is strictly prohibited, and may be unlawful.If you have received this communication in error,please 
immediately notify the sender by return e-mail, and delete the original message and all copies from 
your system. Thank you. 
---------------------------------------------------------------------------------------------------


More information about the dev mailing list