[net-next PATCH v3 6/9] octeontx2-pf: Get VF stats via representor

[Geetha sowjanya <gakula@marvell.com>]

This patch add support to export VF port statistics via representor
netdev. Defines new mbox "NIX_LF_STATS" to fetch VF hw stats.

Signed-off-by: Geetha sowjanya <gakula@marvell.com>
---
 .../net/ethernet/marvell/octeontx2/af/mbox.h  | 32 ++++++++++
 .../ethernet/marvell/octeontx2/af/rvu_rep.c   | 43 +++++++++++++
 .../net/ethernet/marvell/octeontx2/nic/rep.c  | 64 +++++++++++++++++++
 .../net/ethernet/marvell/octeontx2/nic/rep.h  | 14 ++++
 4 files changed, 153 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
index 3b36da28a8f4..b7f250d218d9 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
@@ -320,6 +320,7 @@ M(NIX_MCAST_GRP_DESTROY, 0x802c, nix_mcast_grp_destroy, nix_mcast_grp_destroy_re
 M(NIX_MCAST_GRP_UPDATE, 0x802d, nix_mcast_grp_update,				\
 				nix_mcast_grp_update_req,			\
 				nix_mcast_grp_update_rsp)			\
+M(NIX_LF_STATS, 0x802e, nix_lf_stats, nix_stats_req, nix_stats_rsp)	\
 /* MCS mbox IDs (range 0xA000 - 0xBFFF) */					\
 M(MCS_ALLOC_RESOURCES,	0xa000, mcs_alloc_resources, mcs_alloc_rsrc_req,	\
 				mcs_alloc_rsrc_rsp)				\
@@ -1365,6 +1366,37 @@ struct nix_bandprof_get_hwinfo_rsp {
 	u32 policer_timeunit;
 };
 
+struct nix_stats_req {
+	struct mbox_msghdr hdr;
+	u8 reset;
+	u16 pcifunc;
+	u64 rsvd;
+};
+
+struct nix_stats_rsp {
+	struct mbox_msghdr hdr;
+	u16 pcifunc;
+	struct {
+		u64 octs;
+		u64 ucast;
+		u64 bcast;
+		u64 mcast;
+		u64 drop;
+		u64 drop_octs;
+		u64 drop_mcast;
+		u64 drop_bcast;
+		u64 err;
+		u64 rsvd[5];
+	} rx;
+	struct {
+		u64 ucast;
+		u64 bcast;
+		u64 mcast;
+		u64 drop;
+		u64 octs;
+	} tx;
+};
+
 /* NPC mbox message structs */
 
 #define NPC_MCAM_ENTRY_INVALID	0xFFFF
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c
index 9e32e214c0de..9e73568e7cee 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_rep.c
@@ -13,6 +13,49 @@
 #include "rvu.h"
 #include "rvu_reg.h"
 
+#define RVU_LF_RX_STATS(reg) \
+		rvu_read64(rvu, blkaddr, NIX_AF_LFX_RX_STATX(nixlf, reg))
+
+#define RVU_LF_TX_STATS(reg) \
+		rvu_read64(rvu, blkaddr, NIX_AF_LFX_TX_STATX(nixlf, reg))
+
+int rvu_mbox_handler_nix_lf_stats(struct rvu *rvu,
+				  struct nix_stats_req *req,
+				  struct nix_stats_rsp *rsp)
+{
+	u16 pcifunc = req->pcifunc;
+	int nixlf, blkaddr, err;
+	struct msg_req rst_req;
+	struct msg_rsp rst_rsp;
+
+	err = nix_get_nixlf(rvu, pcifunc, &nixlf, &blkaddr);
+	if (err)
+		return 0;
+
+	if (req->reset) {
+		rst_req.hdr.pcifunc = pcifunc;
+		return rvu_mbox_handler_nix_stats_rst(rvu, &rst_req, &rst_rsp);
+	}
+	rsp->rx.octs = RVU_LF_RX_STATS(RX_OCTS);
+	rsp->rx.ucast = RVU_LF_RX_STATS(RX_UCAST);
+	rsp->rx.bcast = RVU_LF_RX_STATS(RX_BCAST);
+	rsp->rx.mcast = RVU_LF_RX_STATS(RX_MCAST);
+	rsp->rx.drop = RVU_LF_RX_STATS(RX_DROP);
+	rsp->rx.err = RVU_LF_RX_STATS(RX_ERR);
+	rsp->rx.drop_octs = RVU_LF_RX_STATS(RX_DROP_OCTS);
+	rsp->rx.drop_mcast = RVU_LF_RX_STATS(RX_DRP_MCAST);
+	rsp->rx.drop_bcast = RVU_LF_RX_STATS(RX_DRP_BCAST);
+
+	rsp->tx.octs = RVU_LF_TX_STATS(TX_OCTS);
+	rsp->tx.ucast = RVU_LF_TX_STATS(TX_UCAST);
+	rsp->tx.bcast = RVU_LF_TX_STATS(TX_BCAST);
+	rsp->tx.mcast = RVU_LF_TX_STATS(TX_MCAST);
+	rsp->tx.drop = RVU_LF_TX_STATS(TX_DROP);
+
+	rsp->pcifunc = req->pcifunc;
+	return 0;
+}
+
 static int rvu_rep_get_vlan_id(struct rvu *rvu, u16 pcifunc)
 {
 	int id;
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
index 19516dae2e94..87ea493d65ae 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.c
@@ -28,6 +28,67 @@ MODULE_DESCRIPTION(DRV_STRING);
 MODULE_LICENSE("GPL");
 MODULE_DEVICE_TABLE(pci, rvu_rep_id_table);
 
+static void rvu_rep_get_stats(struct work_struct *work)
+{
+	struct delayed_work *del_work = to_delayed_work(work);
+	struct nix_stats_req *req;
+	struct nix_stats_rsp *rsp;
+	struct rep_stats *stats;
+	struct otx2_nic *priv;
+	struct rep_dev *rep;
+	int err;
+
+	rep = container_of(del_work, struct rep_dev, stats_wrk);
+	priv = rep->mdev;
+
+	mutex_lock(&priv->mbox.lock);
+	req = otx2_mbox_alloc_msg_nix_lf_stats(&priv->mbox);
+	if (!req) {
+		mutex_unlock(&priv->mbox.lock);
+		return;
+	}
+	req->pcifunc = rep->pcifunc;
+	err = otx2_sync_mbox_msg_busy_poll(&priv->mbox);
+	if (err)
+		goto exit;
+
+	rsp = (struct nix_stats_rsp *)
+	      otx2_mbox_get_rsp(&priv->mbox.mbox, 0, &req->hdr);
+
+	if (IS_ERR(rsp)) {
+		err = PTR_ERR(rsp);
+		goto exit;
+	}
+
+	stats = &rep->stats;
+	stats->rx_bytes = rsp->rx.octs;
+	stats->rx_frames = rsp->rx.ucast + rsp->rx.bcast +
+			    rsp->rx.mcast;
+	stats->rx_drops = rsp->rx.drop;
+	stats->rx_mcast_frames = rsp->rx.mcast;
+	stats->tx_bytes = rsp->tx.octs;
+	stats->tx_frames = rsp->tx.ucast + rsp->tx.bcast + rsp->tx.mcast;
+	stats->tx_drops = rsp->tx.drop;
+exit:
+	mutex_unlock(&priv->mbox.lock);
+}
+
+static void rvu_rep_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
+{
+	struct rep_dev *rep = netdev_priv(dev);
+
+	stats->rx_packets = rep->stats.rx_frames;
+	stats->rx_bytes = rep->stats.rx_bytes;
+	stats->rx_dropped = rep->stats.rx_drops;
+	stats->multicast = rep->stats.rx_mcast_frames;
+
+	stats->tx_packets = rep->stats.tx_frames;
+	stats->tx_bytes = rep->stats.tx_bytes;
+	stats->tx_dropped = rep->stats.tx_drops;
+
+	schedule_delayed_work(&rep->stats_wrk, msecs_to_jiffies(100));
+}
+
 static int rvu_eswitch_config(struct otx2_nic *priv, u8 ena)
 {
 	struct esw_cfg_req *req;
@@ -87,6 +148,7 @@ static const struct net_device_ops rvu_rep_netdev_ops = {
 	.ndo_open		= rvu_rep_open,
 	.ndo_stop		= rvu_rep_stop,
 	.ndo_start_xmit		= rvu_rep_xmit,
+	.ndo_get_stats64	= rvu_rep_get_stats64,
 };
 
 static int rvu_rep_napi_init(struct otx2_nic *priv, struct netlink_ext_ack *extack)
@@ -226,6 +288,8 @@ int rvu_rep_create(struct otx2_nic *priv, struct netlink_ext_ack *extack)
 			NL_SET_ERR_MSG_MOD(extack, "PFVF reprentator registration failed\n");
 			goto exit;
 		}
+
+		INIT_DELAYED_WORK(&rep->stats_wrk, rvu_rep_get_stats);
 	}
 	err = rvu_rep_napi_init(priv, extack);
 	if (err)
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/rep.h b/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
index c04874c4d4c6..5d39bf636655 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/rep.h
@@ -17,9 +17,23 @@
 #define PCI_DEVID_RVU_REP	0xA0E0
 
 #define RVU_MAX_REP	OTX2_MAX_CQ_CNT
+
+struct rep_stats {
+	u64 rx_bytes;
+	u64 rx_frames;
+	u64 rx_drops;
+	u64 rx_mcast_frames;
+
+	u64 tx_bytes;
+	u64 tx_frames;
+	u64 tx_drops;
+};
+
 struct rep_dev {
 	struct otx2_nic *mdev;
 	struct net_device *netdev;
+	struct rep_stats stats;
+	struct delayed_work stats_wrk;
 	u16 rep_id;
 	u16 pcifunc;
 };
-- 
2.25.1