octeontx2-af: Reset NIXLF's Rx/Tx stats

This patch adds a new mailbox message to reset
a NIXLF's receive and transmit HW stats.
Signed-off-by: NVamsi Attunuru <vamsi.attunuru@marvell.com>
Signed-off-by: NSunil Goutham <sgoutham@marvell.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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

@@ -155,7 +155,8 @@ M(NIX_AQ_ENQ,		0x8002, nix_aq_enq_req, nix_aq_enq_rsp)		\
 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_TXSCHQ_CFG,	0x8006, nix_txschq_config, msg_rsp)		\
+M(NIX_STATS_RST,	0x8007, msg_req, msg_rsp)
 
 /* Messages initiated by AF (range 0xC00 - 0xDFF) */
 #define MBOX_UP_CGX_MESSAGES						\

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

@@ -288,4 +288,6 @@ int rvu_mbox_handler_NIX_TXSCH_FREE(struct rvu *rvu,
 int rvu_mbox_handler_NIX_TXSCHQ_CFG(struct rvu *rvu,
 				    struct nix_txschq_config *req,
 				    struct msg_rsp *rsp);
+int rvu_mbox_handler_NIX_STATS_RST(struct rvu *rvu, struct msg_req *req,
+				   struct msg_rsp *rsp);
 #endif /* RVU_H */

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

@@ -1053,6 +1053,36 @@ static int nix_setup_txschq(struct rvu *rvu, struct nix_hw *nix_hw, int blkaddr)
 	return 0;
 }
 
+int rvu_mbox_handler_NIX_STATS_RST(struct rvu *rvu, struct msg_req *req,
+				   struct msg_rsp *rsp)
+{
+	struct rvu_hwinfo *hw = rvu->hw;
+	u16 pcifunc = req->hdr.pcifunc;
+	int i, nixlf, blkaddr;
+	u64 stats;
+
+	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;
+
+	/* Get stats count supported by HW */
+	stats = rvu_read64(rvu, blkaddr, NIX_AF_CONST1);
+
+	/* Reset tx stats */
+	for (i = 0; i < ((stats >> 24) & 0xFF); i++)
+		rvu_write64(rvu, blkaddr, NIX_AF_LFX_TX_STATX(nixlf, i), 0);
+
+	/* Reset rx stats */
+	for (i = 0; i < ((stats >> 32) & 0xFF); i++)
+		rvu_write64(rvu, blkaddr, NIX_AF_LFX_RX_STATX(nixlf, i), 0);
+
+	return 0;
+}
+
 static int nix_calibrate_x2p(struct rvu *rvu, int blkaddr)
 {
 	int idx, err;