Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 605f81aa authored by Michal Kazior's avatar Michal Kazior Committed by Kalle Valo
Browse files

ath10k: implement rx checksum offloading 



HW supports L3/L4 rx checksum offloading.

This should reduce CPU load and improve
performance on slow host machines.

Signed-off-by: default avatarMichal Kazior <michal.kazior@tieto.com>
Signed-off-by: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent 8865bee4

drivers/net/wireless/ath/ath10k/htt_rx.c

+40 −0
Original line number Diff line number Diff line
@@ -804,6 +804,37 @@ static bool ath10k_htt_rx_has_fcs_err(struct sk_buff *skb) 
	return false;

}



static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)

{

	struct htt_rx_desc *rxd;

	u32 flags, info;

	bool is_ip4, is_ip6;

	bool is_tcp, is_udp;

	bool ip_csum_ok, tcpudp_csum_ok;



	rxd = (void *)skb->data - sizeof(*rxd);

	flags = __le32_to_cpu(rxd->attention.flags);

	info = __le32_to_cpu(rxd->msdu_start.info1);



	is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);

	is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);

	is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);

	is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);

	ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);

	tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);



	if (!is_ip4 && !is_ip6)

		return CHECKSUM_NONE;

	if (!is_tcp && !is_udp)

		return CHECKSUM_NONE;

	if (!ip_csum_ok)

		return CHECKSUM_NONE;

	if (!tcpudp_csum_ok)

		return CHECKSUM_NONE;



	return CHECKSUM_UNNECESSARY;

}



static void ath10k_htt_rx_handler(struct ath10k_htt *htt,

				  struct htt_rx_indication *rx)

{
@@ -815,6 +846,7 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt, 
	u8 *fw_desc;

	int i, j;

	int ret;

	int ip_summed;



	memset(&info, 0, sizeof(info));
@@ -889,6 +921,11 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt, 
				continue;

			}



			/* The skb is not yet processed and it may be

			 * reallocated. Since the offload is in the original

			 * skb extract the checksum now and assign it later */

			ip_summed = ath10k_htt_rx_get_csum_state(msdu_head);



			info.skb     = msdu_head;

			info.fcs_err = ath10k_htt_rx_has_fcs_err(msdu_head);

			info.signal  = ATH10K_DEFAULT_NOISE_FLOOR;
@@ -914,6 +951,8 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt, 
			if (ath10k_htt_rx_hdr_is_amsdu((void *)info.skb->data))

				ath10k_dbg(ATH10K_DBG_HTT, "htt mpdu is amsdu\n");



			info.skb->ip_summed = ip_summed;



			ath10k_dbg_dump(ATH10K_DBG_HTT_DUMP, NULL, "htt mpdu: ",

					info.skb->data, info.skb->len);

			ath10k_process_rx(htt->ar, &info);
@@ -980,6 +1019,7 @@ static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt, 
	info.status = HTT_RX_IND_MPDU_STATUS_OK;

	info.encrypt_type = MS(__le32_to_cpu(rxd->mpdu_start.info0),

				RX_MPDU_START_INFO0_ENCRYPT_TYPE);

	info.skb->ip_summed = ath10k_htt_rx_get_csum_state(info.skb);



	if (tkip_mic_err) {

		ath10k_warn("tkip mic error\n");