octeontx2-af: Support to retrieve CGX LMAC stats

This patch adds support for a RVU PF/VF driver to retrieve
it's mapped CGX LMAC Rx and Tx stats from AF via mbox.
New mailbox msg is added is added.
Signed-off-by: Christina Jacob <cjacob@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/cgx.c

@@ -119,6 +119,28 @@ void *cgx_get_pdata(int cgx_id)
 }
 EXPORT_SYMBOL(cgx_get_pdata);
 
+int cgx_get_rx_stats(void *cgxd, int lmac_id, int idx, u64 *rx_stat)
+{
+	struct cgx *cgx = cgxd;
+
+	if (!cgx || lmac_id >= cgx->lmac_count)
+		return -ENODEV;
+	*rx_stat =  cgx_read(cgx, lmac_id, CGXX_CMRX_RX_STAT0 + (idx * 8));
+	return 0;
+}
+EXPORT_SYMBOL(cgx_get_rx_stats);
+
+int cgx_get_tx_stats(void *cgxd, int lmac_id, int idx, u64 *tx_stat)
+{
+	struct cgx *cgx = cgxd;
+
+	if (!cgx || lmac_id >= cgx->lmac_count)
+		return -ENODEV;
+	*tx_stat = cgx_read(cgx, lmac_id, CGXX_CMRX_TX_STAT0 + (idx * 8));
+	return 0;
+}
+EXPORT_SYMBOL(cgx_get_tx_stats);
+
 int cgx_lmac_rx_tx_enable(void *cgxd, int lmac_id, bool enable)
 {
 	struct cgx *cgx = cgxd;

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

@@ -32,7 +32,9 @@
 #define  FW_CGX_INT				BIT_ULL(1)
 #define CGXX_CMRX_INT_ENA_W1S		0x058
 #define CGXX_CMRX_RX_ID_MAP		0x060
+#define CGXX_CMRX_RX_STAT0		0x070
 #define CGXX_CMRX_RX_LMACS		0x128
+#define CGXX_CMRX_TX_STAT0		0x700
 #define CGXX_SCRATCH0_REG		0x1050
 #define CGXX_SCRATCH1_REG		0x1058
 #define CGX_CONST			0x2000
@@ -66,5 +68,7 @@ int cgx_get_cgx_cnt(void);
 int cgx_get_lmac_cnt(void *cgxd);
 void *cgx_get_pdata(int cgx_id);
 int cgx_lmac_evh_register(struct cgx_event_cb *cb, void *cgxd, int lmac_id);
+int cgx_get_tx_stats(void *cgxd, int lmac_id, int idx, u64 *tx_stat);
+int cgx_get_rx_stats(void *cgxd, int lmac_id, int idx, u64 *rx_stat);
 int cgx_lmac_rx_tx_enable(void *cgxd, int lmac_id, bool enable);
 #endif /* CGX_H */

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

@@ -126,6 +126,7 @@ M(MSIX_OFFSET,		0x004, msg_req, msix_offset_rsp)		\
 /* CGX mbox IDs (range 0x200 - 0x3FF) */				\
 M(CGX_START_RXTX,	0x200, msg_req, msg_rsp)			\
 M(CGX_STOP_RXTX,	0x201, msg_req, msg_rsp)			\
+M(CGX_STATS,		0x202, msg_req, cgx_stats_rsp)			\
 /* NPA mbox IDs (range 0x400 - 0x5FF) */				\
 /* SSO/SSOW mbox IDs (range 0x600 - 0x7FF) */				\
 /* TIM mbox IDs (range 0x800 - 0x9FF) */				\
@@ -210,4 +211,14 @@ struct msix_offset_rsp {
 	u16  cptlf_msixoff[MAX_RVU_BLKLF_CNT];
 };
 
+/* CGX mbox message formats */
+
+struct cgx_stats_rsp {
+	struct mbox_msghdr hdr;
+#define CGX_RX_STATS_COUNT	13
+#define CGX_TX_STATS_COUNT	18
+	u64 rx_stats[CGX_RX_STATS_COUNT];
+	u64 tx_stats[CGX_TX_STATS_COUNT];
+};
+
 #endif /* MBOX_H */

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

@@ -171,4 +171,6 @@ int rvu_mbox_handler_CGX_START_RXTX(struct rvu *rvu, struct msg_req *req,
 				    struct msg_rsp *rsp);
 int rvu_mbox_handler_CGX_STOP_RXTX(struct rvu *rvu, struct msg_req *req,
 				   struct msg_rsp *rsp);
+int rvu_mbox_handler_CGX_STATS(struct rvu *rvu, struct msg_req *req,
+			       struct cgx_stats_rsp *rsp);
 #endif /* RVU_H */

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

@@ -224,3 +224,40 @@ int rvu_mbox_handler_CGX_STOP_RXTX(struct rvu *rvu, struct msg_req *req,
 	rvu_cgx_config_rxtx(rvu, req->hdr.pcifunc, false);
 	return 0;
 }
+
+int rvu_mbox_handler_CGX_STATS(struct rvu *rvu, struct msg_req *req,
+			       struct cgx_stats_rsp *rsp)
+{
+	int pf = rvu_get_pf(req->hdr.pcifunc);
+	int stat = 0, err = 0;
+	u64 tx_stat, rx_stat;
+	u8 cgx_idx, lmac;
+	void *cgxd;
+
+	if ((req->hdr.pcifunc & RVU_PFVF_FUNC_MASK) ||
+	    !is_pf_cgxmapped(rvu, pf))
+		return -ENODEV;
+
+	rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_idx, &lmac);
+	cgxd = rvu_cgx_pdata(cgx_idx, rvu);
+
+	/* Rx stats */
+	while (stat < CGX_RX_STATS_COUNT) {
+		err = cgx_get_rx_stats(cgxd, lmac, stat, &rx_stat);
+		if (err)
+			return err;
+		rsp->rx_stats[stat] = rx_stat;
+		stat++;
+	}
+
+	/* Tx stats */
+	stat = 0;
+	while (stat < CGX_TX_STATS_COUNT) {
+		err = cgx_get_tx_stats(cgxd, lmac, stat, &tx_stat);
+		if (err)
+			return err;
+		rsp->tx_stats[stat] = tx_stat;
+		stat++;
+	}
+	return 0;
+}