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From f18c355c95b64d442e4f0cee4e44f6ef2b3d8905 Mon Sep 17 00:00:00 2001
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From: Jonathan Toppins <jtoppins@redhat.com>
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Date: Wed, 2 Oct 2019 18:23:04 -0400
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Subject: [PATCH 49/96] [netdrv] bnxt_en: Add hardware GRO setup function for
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57500 chips
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Message-id: <8e748026e423be248e251a6fb5aa5c7dc5814864.1570027456.git.jtoppins@redhat.com>
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Patchwork-id: 276466
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O-Subject: [RHEL-8.2 PATCH 42/78] bnxt_en: Add hardware GRO setup function for 57500 chips.
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Bugzilla: 1724766
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RH-Acked-by: John Linville <linville@redhat.com>
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RH-Acked-by: Jarod Wilson <jarod@redhat.com>
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Add a more optimized hardware GRO function to setup the SKB on 57500
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chips. Some workaround code is no longer needed on 57500 chips and
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the pseudo checksum is also calculated in hardware, so no need to
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do the software pseudo checksum in the driver.
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Signed-off-by: Michael Chan <michael.chan@broadcom.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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(cherry picked from commit 67912c366d4bb0a9d108459e7c845cc7ba83f76f)
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Bugzilla: 1724766
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Build Info: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=23809532
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Tested: build, boot, basic ping
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Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
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Signed-off-by: Bruno Meneguele <bmeneg@redhat.com>
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---
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drivers/net/ethernet/broadcom/bnxt/bnxt.c | 33 ++++++++++++++++++++++++++++++-
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1 file changed, 32 insertions(+), 1 deletion(-)
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Index: src/drivers/net/ethernet/broadcom/bnxt/bnxt.c
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===================================================================
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--- src.orig/drivers/net/ethernet/broadcom/bnxt/bnxt.c 2020-02-06 16:23:16.749503615 +0100
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+++ src/drivers/net/ethernet/broadcom/bnxt/bnxt.c 2020-02-06 16:23:16.886502357 +0100
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@@ -1361,6 +1361,35 @@
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return skb;
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}
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+static struct sk_buff *bnxt_gro_func_5750x(struct bnxt_tpa_info *tpa_info,
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+ int payload_off, int tcp_ts,
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+ struct sk_buff *skb)
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+{
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+#ifdef CONFIG_INET
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+ u16 outer_ip_off, inner_ip_off, inner_mac_off;
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+ u32 hdr_info = tpa_info->hdr_info;
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+ int iphdr_len, nw_off;
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+
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+ inner_ip_off = BNXT_TPA_INNER_L3_OFF(hdr_info);
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+ inner_mac_off = BNXT_TPA_INNER_L2_OFF(hdr_info);
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+ outer_ip_off = BNXT_TPA_OUTER_L3_OFF(hdr_info);
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+
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+ nw_off = inner_ip_off - ETH_HLEN;
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+ skb_set_network_header(skb, nw_off);
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+ iphdr_len = (tpa_info->flags2 & RX_TPA_START_CMP_FLAGS2_IP_TYPE) ?
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+ sizeof(struct ipv6hdr) : sizeof(struct iphdr);
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+ skb_set_transport_header(skb, nw_off + iphdr_len);
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+
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+ if (inner_mac_off) { /* tunnel */
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+ __be16 proto = *((__be16 *)(skb->data + outer_ip_off -
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+ ETH_HLEN - 2));
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+
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+ bnxt_gro_tunnel(skb, proto);
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+ }
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+#endif
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+ return skb;
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+}
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+
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#define BNXT_IPV4_HDR_SIZE (sizeof(struct iphdr) + sizeof(struct tcphdr))
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#define BNXT_IPV6_HDR_SIZE (sizeof(struct ipv6hdr) + sizeof(struct tcphdr))
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@@ -10920,8 +10949,10 @@
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#endif
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if (BNXT_SUPPORTS_TPA(bp)) {
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bp->gro_func = bnxt_gro_func_5730x;
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- if (BNXT_CHIP_P4_PLUS(bp))
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+ if (BNXT_CHIP_P4(bp))
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bp->gro_func = bnxt_gro_func_5731x;
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+ else if (BNXT_CHIP_P5(bp))
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+ bp->gro_func = bnxt_gro_func_5750x;
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}
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if (!BNXT_CHIP_P4_PLUS(bp))
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bp->flags |= BNXT_FLAG_DOUBLE_DB;
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