Thread (13 messages) 13 messages, 2 authors, 2016-06-14

[PATCH net-next 07/11] bnxt_en: Refactor bnxt_gro_skb().

From: Michael Chan <michael.chan@broadcom.com>
Date: 2016-06-13 06:25:58
Subsystem: broadcom bnxt_en 50 gigabit ethernet driver, networking drivers, the rest · Maintainers: Michael Chan, Pavan Chebbi, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds

Newer chips require different logic to handle GRO packets.  So refactor
the code so that we can call different functions depending on the chip.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 52 ++++++++++++++++++++-----------
 drivers/net/ethernet/broadcom/bnxt/bnxt.h |  3 ++
 2 files changed, 36 insertions(+), 19 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 0fd27b0..4e3b9f5 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -945,29 +945,15 @@ static void bnxt_abort_tpa(struct bnxt *bp, struct bnxt_napi *bnapi,
 #define BNXT_IPV4_HDR_SIZE	(sizeof(struct iphdr) + sizeof(struct tcphdr))
 #define BNXT_IPV6_HDR_SIZE	(sizeof(struct ipv6hdr) + sizeof(struct tcphdr))
 
-static inline struct sk_buff *bnxt_gro_skb(struct bnxt_tpa_info *tpa_info,
-					   struct rx_tpa_end_cmp *tpa_end,
-					   struct rx_tpa_end_cmp_ext *tpa_end1,
+static struct sk_buff *bnxt_gro_func_5730x(struct bnxt_tpa_info *tpa_info,
+					   int payload_off, int tcp_ts,
 					   struct sk_buff *skb)
 {
 #ifdef CONFIG_INET
 	struct tcphdr *th;
-	int payload_off, tcp_opt_len = 0;
-	int len, nw_off;
-	u16 segs;
-
-	segs = TPA_END_TPA_SEGS(tpa_end);
-	if (segs == 1)
-		return skb;
+	int len, nw_off, tcp_opt_len;
 
-	NAPI_GRO_CB(skb)->count = segs;
-	skb_shinfo(skb)->gso_size =
-		le32_to_cpu(tpa_end1->rx_tpa_end_cmp_seg_len);
-	skb_shinfo(skb)->gso_type = tpa_info->gso_type;
-	payload_off = (le32_to_cpu(tpa_end->rx_tpa_end_cmp_misc_v1) &
-		       RX_TPA_END_CMP_PAYLOAD_OFFSET) >>
-		      RX_TPA_END_CMP_PAYLOAD_OFFSET_SHIFT;
-	if (TPA_END_GRO_TS(tpa_end))
+	if (tcp_ts)
 		tcp_opt_len = 12;
 
 	if (tpa_info->gso_type == SKB_GSO_TCPV4) {
@@ -1024,6 +1010,32 @@ static inline struct sk_buff *bnxt_gro_skb(struct bnxt_tpa_info *tpa_info,
 	return skb;
 }
 
+static inline struct sk_buff *bnxt_gro_skb(struct bnxt *bp,
+					   struct bnxt_tpa_info *tpa_info,
+					   struct rx_tpa_end_cmp *tpa_end,
+					   struct rx_tpa_end_cmp_ext *tpa_end1,
+					   struct sk_buff *skb)
+{
+#ifdef CONFIG_INET
+	int payload_off;
+	u16 segs;
+
+	segs = TPA_END_TPA_SEGS(tpa_end);
+	if (segs == 1)
+		return skb;
+
+	NAPI_GRO_CB(skb)->count = segs;
+	skb_shinfo(skb)->gso_size =
+		le32_to_cpu(tpa_end1->rx_tpa_end_cmp_seg_len);
+	skb_shinfo(skb)->gso_type = tpa_info->gso_type;
+	payload_off = (le32_to_cpu(tpa_end->rx_tpa_end_cmp_misc_v1) &
+		       RX_TPA_END_CMP_PAYLOAD_OFFSET) >>
+		      RX_TPA_END_CMP_PAYLOAD_OFFSET_SHIFT;
+	skb = bp->gro_func(tpa_info, payload_off, TPA_END_GRO_TS(tpa_end), skb);
+#endif
+	return skb;
+}
+
 static inline struct sk_buff *bnxt_tpa_end(struct bnxt *bp,
 					   struct bnxt_napi *bnapi,
 					   u32 *raw_cons,
@@ -1134,7 +1146,7 @@ static inline struct sk_buff *bnxt_tpa_end(struct bnxt *bp,
 	}
 
 	if (TPA_END_GRO(tpa_end))
-		skb = bnxt_gro_skb(tpa_info, tpa_end, tpa_end1, skb);
+		skb = bnxt_gro_skb(bp, tpa_info, tpa_end, tpa_end1, skb);
 
 	return skb;
 }
@@ -6420,6 +6432,8 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (rc)
 		goto init_err;
 
+	bp->gro_func = bnxt_gro_func_5730x;
+
 	rc = bnxt_hwrm_func_drv_rgtr(bp);
 	if (rc)
 		goto init_err;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index b754be6..d62f4c2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -953,6 +953,9 @@ struct bnxt {
 	struct bnxt_rx_ring_info	*rx_ring;
 	struct bnxt_tx_ring_info	*tx_ring;
 
+	struct sk_buff *	(*gro_func)(struct bnxt_tpa_info *, int, int,
+					    struct sk_buff *);
+
 	u32			rx_buf_size;
 	u32			rx_buf_use_size;	/* useable size */
 	u32			rx_ring_size;
-- 
1.8.3.1
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help