bnxt_en: Add extended port statistics support

Gather periodic extended port statistics, if the device is PF and
link is up.
Signed-off-by: NVasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -3059,12 +3059,21 @@ static void bnxt_free_stats(struct bnxt *bp)
 	u32 size, i;
 	struct pci_dev *pdev = bp->pdev;
 
+	bp->flags &= ~BNXT_FLAG_PORT_STATS;
+	bp->flags &= ~BNXT_FLAG_PORT_STATS_EXT;
+
 	if (bp->hw_rx_port_stats) {
 		dma_free_coherent(&pdev->dev, bp->hw_port_stats_size,
 				  bp->hw_rx_port_stats,
 				  bp->hw_rx_port_stats_map);
 		bp->hw_rx_port_stats = NULL;
-		bp->flags &= ~BNXT_FLAG_PORT_STATS;
+	}
+
+	if (bp->hw_rx_port_stats_ext) {
+		dma_free_coherent(&pdev->dev, sizeof(struct rx_port_stats_ext),
+				  bp->hw_rx_port_stats_ext,
+				  bp->hw_rx_port_stats_ext_map);
+		bp->hw_rx_port_stats_ext = NULL;
 	}
 
 	if (!bp->bnapi)
@@ -3120,6 +3129,21 @@ static int bnxt_alloc_stats(struct bnxt *bp)
 		bp->hw_tx_port_stats_map = bp->hw_rx_port_stats_map +
 					   sizeof(struct rx_port_stats) + 512;
 		bp->flags |= BNXT_FLAG_PORT_STATS;
+
+		/* Display extended statistics only if FW supports it */
+		if (bp->hwrm_spec_code < 0x10804 ||
+		    bp->hwrm_spec_code == 0x10900)
+			return 0;
+
+		bp->hw_rx_port_stats_ext =
+			dma_zalloc_coherent(&pdev->dev,
+					    sizeof(struct rx_port_stats_ext),
+					    &bp->hw_rx_port_stats_ext_map,
+					    GFP_KERNEL);
+		if (!bp->hw_rx_port_stats_ext)
+			return 0;
+
+		bp->flags |= BNXT_FLAG_PORT_STATS_EXT;
 	}
 	return 0;
 }
@@ -5340,6 +5364,21 @@ static int bnxt_hwrm_port_qstats(struct bnxt *bp)
 	return rc;
 }
 
+static int bnxt_hwrm_port_qstats_ext(struct bnxt *bp)
+{
+	struct hwrm_port_qstats_ext_input req = {0};
+	struct bnxt_pf_info *pf = &bp->pf;
+
+	if (!(bp->flags & BNXT_FLAG_PORT_STATS_EXT))
+		return 0;
+
+	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_PORT_QSTATS_EXT, -1, -1);
+	req.port_id = cpu_to_le16(pf->port_id);
+	req.rx_stat_size = cpu_to_le16(sizeof(struct rx_port_stats_ext));
+	req.rx_stat_host_addr = cpu_to_le64(bp->hw_rx_port_stats_ext_map);
+	return hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+}
+
 static void bnxt_hwrm_free_tunnel_ports(struct bnxt *bp)
 {
 	if (bp->vxlan_port_cnt) {
@@ -7491,8 +7530,10 @@ static void bnxt_sp_task(struct work_struct *work)
 		bnxt_hwrm_tunnel_dst_port_free(
 			bp, TUNNEL_DST_PORT_FREE_REQ_TUNNEL_TYPE_GENEVE);
 	}
-	if (test_and_clear_bit(BNXT_PERIODIC_STATS_SP_EVENT, &bp->sp_event))
+	if (test_and_clear_bit(BNXT_PERIODIC_STATS_SP_EVENT, &bp->sp_event)) {
 		bnxt_hwrm_port_qstats(bp);
+		bnxt_hwrm_port_qstats_ext(bp);
+	}
 
 	if (test_and_clear_bit(BNXT_LINK_CHNG_SP_EVENT, &bp->sp_event)) {
 		int rc;

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -1154,6 +1154,7 @@ struct bnxt {
 	#define BNXT_FLAG_DIM		0x2000000
 	#define BNXT_FLAG_ROCE_MIRROR_CAP	0x4000000
 	#define BNXT_FLAG_NEW_RM	0x8000000
+	#define BNXT_FLAG_PORT_STATS_EXT	0x10000000
 
 	#define BNXT_FLAG_ALL_CONFIG_FEATS (BNXT_FLAG_TPA |		\
 					    BNXT_FLAG_RFS |		\
@@ -1273,8 +1274,10 @@ struct bnxt {
 
 	struct rx_port_stats	*hw_rx_port_stats;
 	struct tx_port_stats	*hw_tx_port_stats;
+	struct rx_port_stats_ext	*hw_rx_port_stats_ext;
 	dma_addr_t		hw_rx_port_stats_map;
 	dma_addr_t		hw_tx_port_stats_map;
+	dma_addr_t		hw_rx_port_stats_ext_map;
 	int			hw_port_stats_size;
 
 	u16			hwrm_max_req_len;
@@ -1385,6 +1388,9 @@ struct bnxt {
 	((offsetof(struct tx_port_stats, counter) +	\
 	  sizeof(struct rx_port_stats) + 512) / 8)
 
+#define BNXT_RX_STATS_EXT_OFFSET(counter)		\
+	(offsetof(struct rx_port_stats_ext, counter) / 8)
+
 #define I2C_DEV_ADDR_A0				0xa0
 #define I2C_DEV_ADDR_A2				0xa2
 #define SFP_EEPROM_SFF_8472_COMP_ADDR		0x5e

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

@@ -137,6 +137,9 @@ static int bnxt_set_coalesce(struct net_device *dev,
 #define BNXT_TX_STATS_ENTRY(counter)	\
 	{ BNXT_TX_STATS_OFFSET(counter), __stringify(counter) }
 
+#define BNXT_RX_STATS_EXT_ENTRY(counter)	\
+	{ BNXT_RX_STATS_EXT_OFFSET(counter), __stringify(counter) }
+
 static const struct {
 	long offset;
 	char string[ETH_GSTRING_LEN];
@@ -223,7 +226,19 @@ static const struct {
 	BNXT_TX_STATS_ENTRY(tx_stat_error),
 };
 
+static const struct {
+	long offset;
+	char string[ETH_GSTRING_LEN];
+} bnxt_port_stats_ext_arr[] = {
+	BNXT_RX_STATS_EXT_ENTRY(link_down_events),
+	BNXT_RX_STATS_EXT_ENTRY(continuous_pause_events),
+	BNXT_RX_STATS_EXT_ENTRY(resume_pause_events),
+	BNXT_RX_STATS_EXT_ENTRY(continuous_roce_pause_events),
+	BNXT_RX_STATS_EXT_ENTRY(resume_roce_pause_events),
+};
+
 #define BNXT_NUM_PORT_STATS ARRAY_SIZE(bnxt_port_stats_arr)
+#define BNXT_NUM_PORT_STATS_EXT ARRAY_SIZE(bnxt_port_stats_ext_arr)
 
 static int bnxt_get_num_stats(struct bnxt *bp)
 {
@@ -232,6 +247,9 @@ static int bnxt_get_num_stats(struct bnxt *bp)
 	if (bp->flags & BNXT_FLAG_PORT_STATS)
 		num_stats += BNXT_NUM_PORT_STATS;
 
+	if (bp->flags & BNXT_FLAG_PORT_STATS_EXT)
+		num_stats += BNXT_NUM_PORT_STATS_EXT;
+
 	return num_stats;
 }
 
@@ -279,6 +297,14 @@ static void bnxt_get_ethtool_stats(struct net_device *dev,
 					       bnxt_port_stats_arr[i].offset));
 		}
 	}
+	if (bp->flags & BNXT_FLAG_PORT_STATS_EXT) {
+		__le64 *port_stats_ext = (__le64 *)bp->hw_rx_port_stats_ext;
+
+		for (i = 0; i < BNXT_NUM_PORT_STATS_EXT; i++, j++) {
+			buf[j] = le64_to_cpu(*(port_stats_ext +
+					    bnxt_port_stats_ext_arr[i].offset));
+		}
+	}
 }
 
 static void bnxt_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
@@ -339,6 +365,12 @@ static void bnxt_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
 				buf += ETH_GSTRING_LEN;
 			}
 		}
+		if (bp->flags & BNXT_FLAG_PORT_STATS_EXT) {
+			for (i = 0; i < BNXT_NUM_PORT_STATS_EXT; i++) {
+				strcpy(buf, bnxt_port_stats_ext_arr[i].string);
+				buf += ETH_GSTRING_LEN;
+			}
+		}
 		break;
 	case ETH_SS_TEST:
 		if (bp->num_tests)