diff mbox series

[net-next,3/4] sfc: only use fixed-id if the skb asks for it

Message ID 0b94b8de-13e6-50e6-b103-0a0efb80e70a@solarflare.com
State Accepted
Delegated to: Netdev Driver Reviewers
Headers show
Series sfc: EF100 TSO enhancements | expand

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Context Check Description
jkicinski/cover_letter success Link
jkicinski/fixes_present success Link
jkicinski/patch_count success Link
jkicinski/tree_selection success Clearly marked for net-next
jkicinski/subject_prefix success Link
jkicinski/source_inline success Was 0 now: 0
jkicinski/verify_signedoff success Link
jkicinski/module_param success Was 0 now: 0
jkicinski/build_32bit fail Errors and warnings before: 4 this patch: 4
jkicinski/kdoc success Errors and warnings before: 0 this patch: 0
jkicinski/verify_fixes success Link
jkicinski/checkpatch fail Link
jkicinski/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
jkicinski/header_inline success Link
jkicinski/stable success Stable not CCed

Commit Message

Edward Cree Oct. 28, 2020, 8:43 p.m. UTC 
AIUI, the NETIF_F_TSO_MANGLEID flag is a signal to the stack that a
 driver may _need_ to mangle IDs in order to do TSO, and conversely
 a signal from the stack that the driver is permitted to do so.
Since we support both fixed and incrementing IPIDs, we should rely
 on the SKB_GSO_FIXEDID flag on a per-skb basis, rather than using
 the MANGLEID feature to make all TSOs fixed-id.
Includes other minor cleanups of ef100_make_tso_desc() coding style.

Signed-off-by: Edward Cree <ecree@solarflare.com>
---
 drivers/net/ethernet/sfc/ef100_nic.c |  2 +-
 drivers/net/ethernet/sfc/ef100_tx.c  | 13 +++++++------
 2 files changed, 8 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c
index bf92cdc60cda..8a187a16ac89 100644
--- a/drivers/net/ethernet/sfc/ef100_nic.c
+++ b/drivers/net/ethernet/sfc/ef100_nic.c
@@ -694,7 +694,7 @@  static unsigned int ef100_check_caps(const struct efx_nic *efx,
 #define EF100_OFFLOAD_FEATURES	(NETIF_F_HW_CSUM | NETIF_F_RXCSUM |	\
 	NETIF_F_HIGHDMA | NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_NTUPLE | \
 	NETIF_F_RXHASH | NETIF_F_RXFCS | NETIF_F_TSO_ECN | NETIF_F_RXALL | \
-	NETIF_F_TSO_MANGLEID | NETIF_F_HW_VLAN_CTAG_TX)
+	NETIF_F_HW_VLAN_CTAG_TX)
 
 const struct efx_nic_type ef100_pf_nic_type = {
 	.revision = EFX_REV_EF100,
diff --git a/drivers/net/ethernet/sfc/ef100_tx.c b/drivers/net/ethernet/sfc/ef100_tx.c
index d267b12bdaa0..ad0ad9bad423 100644
--- a/drivers/net/ethernet/sfc/ef100_tx.c
+++ b/drivers/net/ethernet/sfc/ef100_tx.c
@@ -187,21 +187,22 @@  static void ef100_make_tso_desc(struct efx_nic *efx,
 				struct efx_tx_buffer *buffer, efx_oword_t *txd,
 				unsigned int segment_count)
 {
-	u32 mangleid = (efx->net_dev->features & NETIF_F_TSO_MANGLEID) ||
-		skb_shinfo(skb)->gso_type & SKB_GSO_TCP_FIXEDID ?
-		ESE_GZ_TX_DESC_IP4_ID_NO_OP :
-		ESE_GZ_TX_DESC_IP4_ID_INC_MOD16;
-	u16 vlan_enable =  efx->net_dev->features & NETIF_F_HW_VLAN_CTAG_TX ?
-		skb_vlan_tag_present(skb) : 0;
 	bool gso_partial = skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL;
 	unsigned int len, ip_offset, tcp_offset, payload_segs;
+	u32 mangleid = ESE_GZ_TX_DESC_IP4_ID_INC_MOD16;
 	unsigned int outer_ip_offset, outer_l4_offset;
 	u16 vlan_tci = skb_vlan_tag_get(skb);
 	u32 mss = skb_shinfo(skb)->gso_size;
 	bool encap = skb->encapsulation;
+	u16 vlan_enable = 0;
 	struct tcphdr *tcp;
 	u32 paylen;
 
+	if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_FIXEDID)
+		mangleid = ESE_GZ_TX_DESC_IP4_ID_NO_OP;
+	if (efx->net_dev->features & NETIF_F_HW_VLAN_CTAG_TX)
+		vlan_enable = skb_vlan_tag_present(skb);
+
 	len = skb->len - buffer->len;
 	/* We use 1 for the TSO descriptor and 1 for the header */
 	payload_segs = segment_count - 2;