octeontx2-af: Support for VTAG strip and capture

Added support for PF/VF drivers to configure NIX to
capture and/or strip VLAN tag from ingress packets.

Signed-off-by: Vamsi Attunuru <vamsi.attunuru@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/octeontx2/af/mbox.h

@@ -156,7 +156,8 @@ M(NIX_HWCTX_DISABLE,	0x8003, hwctx_disable_req, msg_rsp)		\
 M(NIX_TXSCH_ALLOC,	0x8004, nix_txsch_alloc_req, nix_txsch_alloc_rsp) \
 M(NIX_TXSCH_FREE,	0x8005, nix_txsch_free_req, msg_rsp)		\
 M(NIX_TXSCHQ_CFG,	0x8006, nix_txschq_config, msg_rsp)		\
-M(NIX_STATS_RST,	0x8007, msg_req, msg_rsp)
+M(NIX_STATS_RST,	0x8007, msg_req, msg_rsp)			\
+M(NIX_VTAG_CFG,	0x8008, nix_vtag_config, msg_rsp)
 
 /* Messages initiated by AF (range 0xC00 - 0xDFF) */
 #define MBOX_UP_CGX_MESSAGES						\
@@ -462,4 +463,36 @@ struct nix_txschq_config {
 	u64 regval[MAX_REGS_PER_MBOX_MSG];
 };
 
+struct nix_vtag_config {
+	struct mbox_msghdr hdr;
+	u8 vtag_size;
+	/* cfg_type is '0' for tx vlan cfg
+	 * cfg_type is '1' for rx vlan cfg
+	 */
+	u8 cfg_type;
+	union {
+		/* valid when cfg_type is '0' */
+		struct {
+			/* tx vlan0 tag(C-VLAN) */
+			u64 vlan0;
+			/* tx vlan1 tag(S-VLAN) */
+			u64 vlan1;
+			/* insert tx vlan tag */
+			u8 insert_vlan :1;
+			/* insert tx double vlan tag */
+			u8 double_vlan :1;
+		} tx;
+
+		/* valid when cfg_type is '1' */
+		struct {
+			/* rx vtag type index */
+			u8 vtag_type;
+			/* rx vtag strip */
+			u8 strip_vtag :1;
+			/* rx vtag capture */
+			u8 capture_vtag :1;
+		} rx;
+	};
+};
+
 #endif /* MBOX_H */

drivers/net/ethernet/marvell/octeontx2/af/rvu.h

@@ -319,6 +319,9 @@ int rvu_mbox_handler_NIX_TXSCHQ_CFG(struct rvu *rvu,
 				    struct msg_rsp *rsp);
 int rvu_mbox_handler_NIX_STATS_RST(struct rvu *rvu, struct msg_req *req,
 				   struct msg_rsp *rsp);
+int rvu_mbox_handler_NIX_VTAG_CFG(struct rvu *rvu,
+				  struct nix_vtag_config *req,
+				  struct msg_rsp *rsp);
 
 /* NPC APIs */
 int rvu_npc_init(struct rvu *rvu);

drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c

@@ -1143,6 +1143,65 @@ int rvu_mbox_handler_NIX_TXSCHQ_CFG(struct rvu *rvu,
 	return 0;
 }
 
+static int nix_rx_vtag_cfg(struct rvu *rvu, int nixlf, int blkaddr,
+			   struct nix_vtag_config *req)
+{
+	u64 regval = 0;
+
+#define NIX_VTAGTYPE_MAX 0x8ull
+#define NIX_VTAGSIZE_MASK 0x7ull
+#define NIX_VTAGSTRIP_CAP_MASK 0x30ull
+
+	if (req->rx.vtag_type >= NIX_VTAGTYPE_MAX ||
+	    req->vtag_size > VTAGSIZE_T8)
+		return -EINVAL;
+
+	regval = rvu_read64(rvu, blkaddr,
+			    NIX_AF_LFX_RX_VTAG_TYPEX(nixlf, req->rx.vtag_type));
+
+	if (req->rx.strip_vtag && req->rx.capture_vtag)
+		regval |= BIT_ULL(4) | BIT_ULL(5);
+	else if (req->rx.strip_vtag)
+		regval |= BIT_ULL(4);
+	else
+		regval &= ~(BIT_ULL(4) | BIT_ULL(5));
+
+	regval &= ~NIX_VTAGSIZE_MASK;
+	regval |= req->vtag_size & NIX_VTAGSIZE_MASK;
+
+	rvu_write64(rvu, blkaddr,
+		    NIX_AF_LFX_RX_VTAG_TYPEX(nixlf, req->rx.vtag_type), regval);
+	return 0;
+}
+
+int rvu_mbox_handler_NIX_VTAG_CFG(struct rvu *rvu,
+				  struct nix_vtag_config *req,
+				  struct msg_rsp *rsp)
+{
+	struct rvu_hwinfo *hw = rvu->hw;
+	u16 pcifunc = req->hdr.pcifunc;
+	int blkaddr, nixlf, err;
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NIX, pcifunc);
+	if (blkaddr < 0)
+		return NIX_AF_ERR_AF_LF_INVALID;
+
+	nixlf = rvu_get_lf(rvu, &hw->block[blkaddr], pcifunc, 0);
+	if (nixlf < 0)
+		return NIX_AF_ERR_AF_LF_INVALID;
+
+	if (req->cfg_type) {
+		err = nix_rx_vtag_cfg(rvu, nixlf, blkaddr, req);
+		if (err)
+			return NIX_AF_ERR_PARAM;
+	} else {
+		/* TODO: handle tx vtag configuration */
+		return 0;
+	}
+
+	return 0;
+}
+
 static int nix_setup_mce(struct rvu *rvu, int mce, u8 op,
 			 u16 pcifunc, int next, bool eol)
 {

drivers/net/ethernet/marvell/octeontx2/af/rvu_struct.h

@@ -879,4 +879,9 @@ struct nix_lso_format {
 #endif
 };
 
+/* NIX VTAG size */
+enum nix_vtag_size {
+	VTAGSIZE_T4   = 0x0,
+	VTAGSIZE_T8   = 0x1,
+};
 #endif /* RVU_STRUCT_H */