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Commit 14db81de authored by Manish Chopra's avatar Manish Chopra Committed by David S. Miller
Browse files

qede: Add fastpath support for tunneling 



This patch enables netdev tunneling features and adds
TX/RX fastpath support for tunneling in driver.

Signed-off-by: default avatarManish Chopra <manish.chopra@qlogic.com>
Signed-off-by: default avatarYuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: default avatarAriel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f7985869

drivers/net/ethernet/qlogic/qede/qede.h

+1 −0
Original line number Diff line number Diff line
@@ -290,6 +290,7 @@ struct qede_fastpath { 


#define QEDE_CSUM_ERROR			BIT(0)

#define QEDE_CSUM_UNNECESSARY		BIT(1)

#define QEDE_TUNN_CSUM_UNNECESSARY	BIT(2)



#define QEDE_SP_RX_MODE			1

#define QEDE_SP_VXLAN_PORT_CONFIG	2

drivers/net/ethernet/qlogic/qede/qede_main.c

+91 −10
Original line number Diff line number Diff line
@@ -315,6 +315,9 @@ static u32 qede_xmit_type(struct qede_dev *edev, 
	    (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))

		*ipv6_ext = 1;



	if (skb->encapsulation)

		rc |= XMIT_ENC;



	if (skb_is_gso(skb))

		rc |= XMIT_LSO;
@@ -376,6 +379,16 @@ static int map_frag_to_bd(struct qede_dev *edev, 
	return 0;

}



static u16 qede_get_skb_hlen(struct sk_buff *skb, bool is_encap_pkt)

{

	if (is_encap_pkt)

		return (skb_inner_transport_header(skb) +

			inner_tcp_hdrlen(skb) - skb->data);

	else

		return (skb_transport_header(skb) +

			tcp_hdrlen(skb) - skb->data);

}



/* +2 for 1st BD for headers and 2nd BD for headlen (if required) */

#if ((MAX_SKB_FRAGS + 2) > ETH_TX_MAX_BDS_PER_NON_LSO_PACKET)

static bool qede_pkt_req_lin(struct qede_dev *edev, struct sk_buff *skb,
@@ -386,8 +399,7 @@ static bool qede_pkt_req_lin(struct qede_dev *edev, struct sk_buff *skb, 
	if (xmit_type & XMIT_LSO) {

		int hlen;



		hlen = skb_transport_header(skb) +

		       tcp_hdrlen(skb) - skb->data;

		hlen = qede_get_skb_hlen(skb, xmit_type & XMIT_ENC);



		/* linear payload would require its own BD */

		if (skb_headlen(skb) > hlen)
@@ -495,7 +507,18 @@ netdev_tx_t qede_start_xmit(struct sk_buff *skb, 
		first_bd->data.bd_flags.bitfields |=

			1 << ETH_TX_1ST_BD_FLAGS_L4_CSUM_SHIFT;



		if (xmit_type & XMIT_ENC) {

			first_bd->data.bd_flags.bitfields |=

				1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT;

		} else {

			/* In cases when OS doesn't indicate for inner offloads

			 * when packet is tunnelled, we need to override the HW

			 * tunnel configuration so that packets are treated as

			 * regular non tunnelled packets and no inner offloads

			 * are done by the hardware.

			 */

			first_bd->data.bitfields |= cpu_to_le16(temp);

		}



		/* If the packet is IPv6 with extension header, indicate that

		 * to FW and pass few params, since the device cracker doesn't
@@ -511,10 +534,15 @@ netdev_tx_t qede_start_xmit(struct sk_buff *skb, 
		third_bd->data.lso_mss =

			cpu_to_le16(skb_shinfo(skb)->gso_size);



		if (unlikely(xmit_type & XMIT_ENC)) {

			first_bd->data.bd_flags.bitfields |=

				1 << ETH_TX_1ST_BD_FLAGS_TUNN_IP_CSUM_SHIFT;

			hlen = qede_get_skb_hlen(skb, true);

		} else {

			first_bd->data.bd_flags.bitfields |=

				1 << ETH_TX_1ST_BD_FLAGS_IP_CSUM_SHIFT;

		hlen = skb_transport_header(skb) +

		       tcp_hdrlen(skb) - skb->data;

			hlen = qede_get_skb_hlen(skb, false);

		}



		/* @@@TBD - if will not be removed need to check */

		third_bd->data.bitfields |=
@@ -848,6 +876,9 @@ static void qede_set_skb_csum(struct sk_buff *skb, u8 csum_flag) 


	if (csum_flag & QEDE_CSUM_UNNECESSARY)

		skb->ip_summed = CHECKSUM_UNNECESSARY;



	if (csum_flag & QEDE_TUNN_CSUM_UNNECESSARY)

		skb->csum_level = 1;

}



static inline void qede_skb_receive(struct qede_dev *edev,
@@ -1137,13 +1168,47 @@ static void qede_tpa_end(struct qede_dev *edev, 
	tpa_info->skb = NULL;

}



static u8 qede_check_csum(u16 flag)

static bool qede_tunn_exist(u16 flag)

{

	return !!(flag & (PARSING_AND_ERR_FLAGS_TUNNELEXIST_MASK <<

			  PARSING_AND_ERR_FLAGS_TUNNELEXIST_SHIFT));

}



static u8 qede_check_tunn_csum(u16 flag)

{

	u16 csum_flag = 0;

	u8 tcsum = 0;



	if (flag & (PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_MASK <<

		    PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMWASCALCULATED_SHIFT))

		csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_MASK <<

			     PARSING_AND_ERR_FLAGS_TUNNELL4CHKSMERROR_SHIFT;



	if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK <<

		    PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) {

		csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK <<

			     PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT;

		tcsum = QEDE_TUNN_CSUM_UNNECESSARY;

	}



	csum_flag |= PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_MASK <<

		     PARSING_AND_ERR_FLAGS_TUNNELIPHDRERROR_SHIFT |

		     PARSING_AND_ERR_FLAGS_IPHDRERROR_MASK <<

		     PARSING_AND_ERR_FLAGS_IPHDRERROR_SHIFT;



	if (csum_flag & flag)

		return QEDE_CSUM_ERROR;



	return QEDE_CSUM_UNNECESSARY | tcsum;

}



static u8 qede_check_notunn_csum(u16 flag)

{

	u16 csum_flag = 0;

	u8 csum = 0;



	if ((PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK <<

	     PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT) & flag) {

	if (flag & (PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_MASK <<

		    PARSING_AND_ERR_FLAGS_L4CHKSMWASCALCULATED_SHIFT)) {

		csum_flag |= PARSING_AND_ERR_FLAGS_L4CHKSMERROR_MASK <<

			     PARSING_AND_ERR_FLAGS_L4CHKSMERROR_SHIFT;

		csum = QEDE_CSUM_UNNECESSARY;
@@ -1158,6 +1223,14 @@ static u8 qede_check_csum(u16 flag) 
	return csum;

}



static u8 qede_check_csum(u16 flag)

{

	if (!qede_tunn_exist(flag))

		return qede_check_notunn_csum(flag);

	else

		return qede_check_tunn_csum(flag);

}



static int qede_rx_int(struct qede_fastpath *fp, int budget)

{

	struct qede_dev *edev = fp->edev;
@@ -1987,6 +2060,14 @@ static void qede_init_ndev(struct qede_dev *edev) 
		      NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |

		      NETIF_F_TSO | NETIF_F_TSO6;



	/* Encap features*/

	hw_features |= NETIF_F_GSO_GRE | NETIF_F_GSO_UDP_TUNNEL |

		       NETIF_F_TSO_ECN;

	ndev->hw_enc_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |

				NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO_ECN |

				NETIF_F_TSO6 | NETIF_F_GSO_GRE |

				NETIF_F_GSO_UDP_TUNNEL | NETIF_F_RXCSUM;



	ndev->vlan_features = hw_features | NETIF_F_RXHASH | NETIF_F_RXCSUM |

			      NETIF_F_HIGHDMA;

	ndev->features = hw_features | NETIF_F_RXHASH | NETIF_F_RXCSUM |