patch 'net/txgbe: fix FDIR input mask' has been queued to stable release 24.11.4

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 24.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/26/25. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/e00d3be49ba945ff2b74bf983a08a8a5dc5c5deb

Thanks.

Kevin

---
>From e00d3be49ba945ff2b74bf983a08a8a5dc5c5deb Mon Sep 17 00:00:00 2001
From: Jiawen Wu <jiawenwu at trustnetic.com>
Date: Mon, 27 Oct 2025 11:15:38 +0800
Subject: [PATCH] net/txgbe: fix FDIR input mask

[ upstream commit a2d4de27109033d5061da44aed919bf46cfd7ca9 ]

Fix FDIR mask settings to comply with the hardware configuration. And
mask out the spec field instead of manually setting it to 0.

There are some requirements of mask in hardware:
1) IPv4 mask should be little-endian.
2) Ipv6 source address mask has only 16 bits, one bit of mask
   corresponds to one byte of spec.
3) IPv6 dest address is only supported to perfect match the low 8 bits,
   so it is not taken into account for support in the driver.

Fixes: ea230dda16ad ("net/txgbe: configure flow director filter")

Signed-off-by: Jiawen Wu <jiawenwu at trustnetic.com>
---
 drivers/net/txgbe/txgbe_fdir.c | 49 +++++++++++++++++++++++++++++-----
 drivers/net/txgbe/txgbe_flow.c |  8 ++----
 2 files changed, 45 insertions(+), 12 deletions(-)

diff --git a/drivers/net/txgbe/txgbe_fdir.c b/drivers/net/txgbe/txgbe_fdir.c
index 8d181db33f..6b83a7379d 100644
--- a/drivers/net/txgbe/txgbe_fdir.c
+++ b/drivers/net/txgbe/txgbe_fdir.c
@@ -166,4 +166,13 @@ configure_fdir_flags(const struct rte_eth_fdir_conf *conf,
 }
 
+static inline uint16_t
+txgbe_reverse_fdir_bitmasks(uint16_t mask)
+{
+	mask = ((mask & 0x5555) << 1) | ((mask & 0xAAAA) >> 1);
+	mask = ((mask & 0x3333) << 2) | ((mask & 0xCCCC) >> 2);
+	mask = ((mask & 0x0F0F) << 4) | ((mask & 0xF0F0) >> 4);
+	return ((mask & 0x00FF) << 8) | ((mask & 0xFF00) >> 8);
+}
+
 int
 txgbe_fdir_set_input_mask(struct rte_eth_dev *dev)
@@ -207,13 +216,13 @@ txgbe_fdir_set_input_mask(struct rte_eth_dev *dev)
 	wr32(hw, TXGBE_FDIRSCTPMSK, ~fdirtcpm);
 
-	/* Store source and destination IPv4 masks (big-endian) */
-	wr32(hw, TXGBE_FDIRSIP4MSK, ~info->mask.src_ipv4_mask);
-	wr32(hw, TXGBE_FDIRDIP4MSK, ~info->mask.dst_ipv4_mask);
+	/* Store source and destination IPv4 masks (little-endian) */
+	wr32(hw, TXGBE_FDIRSIP4MSK, rte_be_to_cpu_32(~info->mask.src_ipv4_mask));
+	wr32(hw, TXGBE_FDIRDIP4MSK, rte_be_to_cpu_32(~info->mask.dst_ipv4_mask));
 
 	/*
 	 * Store source and destination IPv6 masks (bit reversed)
 	 */
-	fdiripv6m = TXGBE_FDIRIP6MSK_DST(info->mask.dst_ipv6_mask) |
-		    TXGBE_FDIRIP6MSK_SRC(info->mask.src_ipv6_mask);
+	fdiripv6m = txgbe_reverse_fdir_bitmasks(info->mask.dst_ipv6_mask) << 16;
+	fdiripv6m |= txgbe_reverse_fdir_bitmasks(info->mask.src_ipv6_mask);
 	wr32(hw, TXGBE_FDIRIP6MSK, ~fdiripv6m);
 
@@ -637,6 +646,12 @@ fdir_write_perfect_filter(struct txgbe_hw *hw,
 	fdircmd |= TXGBE_FDIRPICMD_POOL(input->vm_pool);
 
-	if (input->flow_type & TXGBE_ATR_L3TYPE_IPV6)
+	if (input->flow_type & TXGBE_ATR_L3TYPE_IPV6) {
+		/* use SIP4 to store LS Dword of the Source iPv6 address */
+		wr32(hw, TXGBE_FDIRPISIP4, be_to_le32(input->src_ip[3]));
+		wr32(hw, TXGBE_FDIRPISIP6(0), be_to_le32(input->src_ip[2]));
+		wr32(hw, TXGBE_FDIRPISIP6(1), be_to_le32(input->src_ip[1]));
+		wr32(hw, TXGBE_FDIRPISIP6(2), be_to_le32(input->src_ip[0]));
 		fdircmd |= TXGBE_FDIRPICMD_IP6;
+	}
 	wr32(hw, TXGBE_FDIRPICMD, fdircmd);
 
@@ -784,4 +799,24 @@ txgbe_remove_fdir_filter(struct txgbe_hw_fdir_info *fdir_info,
 }
 
+static void
+txgbe_fdir_mask_input(struct txgbe_hw_fdir_mask *mask,
+		      struct txgbe_atr_input *input)
+{
+	int i;
+
+	if (input->flow_type & TXGBE_ATR_L3TYPE_IPV6) {
+		for (i = 0; i < 16; i++) {
+			if (!(mask->src_ipv6_mask & (1 << i)))
+				input->src_ip[i / 4] &= ~(0xFF << ((i % 4) * 8));
+		}
+	} else {
+		input->src_ip[0] &= mask->src_ipv4_mask;
+		input->dst_ip[0] &= mask->dst_ipv4_mask;
+	}
+
+	input->src_port &= mask->src_port_mask;
+	input->dst_port &= mask->dst_port_mask;
+}
+
 int
 txgbe_fdir_filter_program(struct rte_eth_dev *dev,
@@ -806,4 +841,6 @@ txgbe_fdir_filter_program(struct rte_eth_dev *dev,
 		is_perfect = TRUE;
 
+	txgbe_fdir_mask_input(&info->mask, &rule->input);
+
 	if (is_perfect) {
 		fdirhash = atr_compute_perfect_hash(&rule->input,
diff --git a/drivers/net/txgbe/txgbe_flow.c b/drivers/net/txgbe/txgbe_flow.c
index a820081dce..cb8004e48c 100644
--- a/drivers/net/txgbe/txgbe_flow.c
+++ b/drivers/net/txgbe/txgbe_flow.c
@@ -1850,7 +1850,5 @@ txgbe_parse_fdir_filter_normal(struct rte_eth_dev *dev __rte_unused,
 			/* check dst addr mask */
 			for (j = 0; j < 16; j++) {
-				if (ipv6_mask->hdr.dst_addr.a[j] == UINT8_MAX) {
-					rule->mask.dst_ipv6_mask |= 1 << j;
-				} else if (ipv6_mask->hdr.dst_addr.a[j] != 0) {
+				if (ipv6_mask->hdr.dst_addr.a[j] != 0) {
 					memset(rule, 0, sizeof(struct txgbe_fdir_rule));
 					rte_flow_error_set(error, EINVAL,
@@ -2613,7 +2611,5 @@ txgbe_parse_fdir_filter_tunnel(const struct rte_flow_attr *attr,
 			/* check dst addr mask */
 			for (j = 0; j < 16; j++) {
-				if (ipv6_mask->hdr.dst_addr.a[j] == UINT8_MAX) {
-					rule->mask.dst_ipv6_mask |= 1 << j;
-				} else if (ipv6_mask->hdr.dst_addr.a[j] != 0) {
+				if (ipv6_mask->hdr.dst_addr.a[j] != 0) {
 					memset(rule, 0, sizeof(struct txgbe_fdir_rule));
 					rte_flow_error_set(error, EINVAL,
-- 
2.51.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2025-11-21 11:05:10.689113764 +0000
+++ 0035-net-txgbe-fix-FDIR-input-mask.patch	2025-11-21 11:05:09.427201016 +0000
@@ -1 +1 @@
-From a2d4de27109033d5061da44aed919bf46cfd7ca9 Mon Sep 17 00:00:00 2001
+From e00d3be49ba945ff2b74bf983a08a8a5dc5c5deb Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit a2d4de27109033d5061da44aed919bf46cfd7ca9 ]
+
@@ -17 +18,0 @@
-Cc: stable at dpdk.org
@@ -109 +110 @@
-index 095c84823f..d3113b6fc8 100644
+index a820081dce..cb8004e48c 100644