net: txgbe: Support the FDIR rules assigned to VFs

When SR-IOV is enabled, the FDIR rule is supported to filter packets to
VFs. The action queue id is calculated as an absolute id.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/BE7EA355FDDAAA97+20250523080438.27968-2-jiawenwu@trustnetic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Jiawen Wu

drivers/net/ethernet/wangxun/txgbe/txgbe_ethtool.c

@@ -367,12 +367,19 @@ static int txgbe_add_ethtool_fdir_entry(struct txgbe *txgbe,
 		queue = TXGBE_RDB_FDIR_DROP_QUEUE;
 	} else {
 		u32 ring = ethtool_get_flow_spec_ring(fsp->ring_cookie);
+		u8 vf = ethtool_get_flow_spec_ring_vf(fsp->ring_cookie);
 
-		if (ring >= wx->num_rx_queues)
+		if (!vf && ring >= wx->num_rx_queues)
+			return -EINVAL;
+		else if (vf && (vf > wx->num_vfs ||
+				ring >= wx->num_rx_queues_per_pool))
 			return -EINVAL;
 
 		/* Map the ring onto the absolute queue index */
-		queue = wx->rx_ring[ring]->reg_idx;
+		if (!vf)
+			queue = wx->rx_ring[ring]->reg_idx;
+		else
+			queue = ((vf - 1) * wx->num_rx_queues_per_pool) + ring;
 	}
 
 	/* Don't allow indexes to exist outside of available space */

drivers/net/ethernet/wangxun/txgbe/txgbe_fdir.c

@@ -307,6 +307,7 @@ void txgbe_atr(struct wx_ring *ring, struct wx_tx_buffer *first, u8 ptype)
 int txgbe_fdir_set_input_mask(struct wx *wx, union txgbe_atr_input *input_mask)
 {
 	u32 fdirm = 0, fdirtcpm = 0, flex = 0;
+	int index, offset;
 
 	/* Program the relevant mask registers. If src/dst_port or src/dst_addr
 	 * are zero, then assume a full mask for that field.  Also assume that
@@ -352,23 +353,25 @@ int txgbe_fdir_set_input_mask(struct wx *wx, union txgbe_atr_input *input_mask)
 	/* Now mask VM pool and destination IPv6 - bits 5 and 2 */
 	wr32(wx, TXGBE_RDB_FDIR_OTHER_MSK, fdirm);
 
-	flex = rd32(wx, TXGBE_RDB_FDIR_FLEX_CFG(0));
-	flex &= ~TXGBE_RDB_FDIR_FLEX_CFG_FIELD0;
+	index = VMDQ_P(0) / 4;
+	offset = VMDQ_P(0) % 4;
+	flex = rd32(wx, TXGBE_RDB_FDIR_FLEX_CFG(index));
+	flex &= ~(TXGBE_RDB_FDIR_FLEX_CFG_FIELD0 << (offset * 8));
 	flex |= (TXGBE_RDB_FDIR_FLEX_CFG_BASE_MAC |
-		 TXGBE_RDB_FDIR_FLEX_CFG_OFST(0x6));
+		 TXGBE_RDB_FDIR_FLEX_CFG_OFST(0x6)) << (offset * 8);
 
 	switch ((__force u16)input_mask->formatted.flex_bytes & 0xFFFF) {
 	case 0x0000:
 		/* Mask Flex Bytes */
-		flex |= TXGBE_RDB_FDIR_FLEX_CFG_MSK;
+		flex |= TXGBE_RDB_FDIR_FLEX_CFG_MSK << (offset * 8);
 		break;
 	case 0xFFFF:
 		break;
 	default:
 		wx_err(wx, "Error on flexible byte mask\n");
 		return -EINVAL;
 	}
-	wr32(wx, TXGBE_RDB_FDIR_FLEX_CFG(0), flex);
+	wr32(wx, TXGBE_RDB_FDIR_FLEX_CFG(index), flex);
 
 	/* store the TCP/UDP port masks, bit reversed from port layout */
 	fdirtcpm = ntohs(input_mask->formatted.dst_port);
@@ -516,14 +519,16 @@ static void txgbe_fdir_enable(struct wx *wx, u32 fdirctrl)
 static void txgbe_init_fdir_signature(struct wx *wx)
 {
 	u32 fdirctrl = TXGBE_FDIR_PBALLOC_64K;
+	int index = VMDQ_P(0) / 4;
+	int offset = VMDQ_P(0) % 4;
 	u32 flex = 0;
 
-	flex = rd32(wx, TXGBE_RDB_FDIR_FLEX_CFG(0));
-	flex &= ~TXGBE_RDB_FDIR_FLEX_CFG_FIELD0;
+	flex = rd32(wx, TXGBE_RDB_FDIR_FLEX_CFG(index));
+	flex &= ~(TXGBE_RDB_FDIR_FLEX_CFG_FIELD0 << (offset * 8));
 
 	flex |= (TXGBE_RDB_FDIR_FLEX_CFG_BASE_MAC |
-		 TXGBE_RDB_FDIR_FLEX_CFG_OFST(0x6));
-	wr32(wx, TXGBE_RDB_FDIR_FLEX_CFG(0), flex);
+		 TXGBE_RDB_FDIR_FLEX_CFG_OFST(0x6)) << (offset * 8);
+	wr32(wx, TXGBE_RDB_FDIR_FLEX_CFG(index), flex);
 
 	/* Continue setup of fdirctrl register bits:
 	 *  Move the flexible bytes to use the ethertype - shift 6 words

drivers/net/ethernet/wangxun/txgbe/txgbe_type.h

@@ -287,7 +287,7 @@ struct txgbe_fdir_filter {
 	struct hlist_node fdir_node;
 	union txgbe_atr_input filter;
 	u16 sw_idx;
-	u16 action;
+	u64 action;
 };
 
 /* TX/RX descriptor defines */