bnxt_en: Refactor the software ring counters.

We currently have 3 software ring counters, rx_l4_csum_errors,
rx_buf_errors, and missed_irqs.  The 1st two are RX counters and the
last one is a common counter.  Organize them into 2 structures
bnxt_rx_sw_stats and bnxt_cmn_sw_stats.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Michael Chan

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

@@ -1766,7 +1766,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 
 		rc = -EIO;
 		if (rx_err & RX_CMPL_ERRORS_BUFFER_ERROR_MASK) {
-			bnapi->cp_ring.rx_buf_errors++;
+			bnapi->cp_ring.sw_stats.rx.rx_buf_errors++;
 			if (!(bp->flags & BNXT_FLAG_CHIP_P5)) {
 				netdev_warn(bp->dev, "RX buffer error %x\n",
 					    rx_err);
@@ -1849,7 +1849,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 	} else {
 		if (rxcmp1->rx_cmp_cfa_code_errors_v2 & RX_CMP_L4_CS_ERR_BITS) {
 			if (dev->features & NETIF_F_RXCSUM)
-				bnapi->cp_ring.rx_l4_csum_errors++;
+				bnapi->cp_ring.sw_stats.rx.rx_l4_csum_errors++;
 		}
 	}
 
@@ -10285,7 +10285,7 @@ static void bnxt_chk_missed_irq(struct bnxt *bp)
 			bnxt_dbg_hwrm_ring_info_get(bp,
 				DBG_RING_INFO_GET_REQ_RING_TYPE_L2_CMPL,
 				fw_ring_id, &val[0], &val[1]);
-			cpr->missed_irqs++;
+			cpr->sw_stats.cmn.missed_irqs++;
 		}
 	}
 }

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

@@ -910,6 +910,20 @@ struct bnxt_rx_ring_info {
 	struct page_pool	*page_pool;
 };
 
+struct bnxt_rx_sw_stats {
+	u64			rx_l4_csum_errors;
+	u64			rx_buf_errors;
+};
+
+struct bnxt_cmn_sw_stats {
+	u64			missed_irqs;
+};
+
+struct bnxt_sw_stats {
+	struct bnxt_rx_sw_stats rx;
+	struct bnxt_cmn_sw_stats cmn;
+};
+
 struct bnxt_cp_ring_info {
 	struct bnxt_napi	*bnapi;
 	u32			cp_raw_cons;
@@ -937,9 +951,8 @@ struct bnxt_cp_ring_info {
 	struct ctx_hw_stats	*hw_stats;
 	dma_addr_t		hw_stats_map;
 	u32			hw_stats_ctx_id;
-	u64			rx_l4_csum_errors;
-	u64			rx_buf_errors;
-	u64			missed_irqs;
+
+	struct bnxt_sw_stats	sw_stats;
 
 	struct bnxt_ring_struct	cp_ring_struct;
 

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

@@ -171,9 +171,12 @@ static const char * const bnxt_ring_tpa2_stats_str[] = {
 	"rx_tpa_errors",
 };
 
-static const char * const bnxt_ring_sw_stats_str[] = {
+static const char * const bnxt_rx_sw_stats_str[] = {
 	"rx_l4_csum_errors",
 	"rx_buf_errors",
+};
+
+static const char * const bnxt_cmn_sw_stats_str[] = {
 	"missed_irqs",
 };
 
@@ -485,7 +488,8 @@ static int bnxt_get_num_ring_stats(struct bnxt *bp)
 	int num_stats;
 
 	num_stats = ARRAY_SIZE(bnxt_ring_stats_str) +
-		    ARRAY_SIZE(bnxt_ring_sw_stats_str) +
+		    ARRAY_SIZE(bnxt_rx_sw_stats_str) +
+		    ARRAY_SIZE(bnxt_cmn_sw_stats_str) +
 		    bnxt_get_num_tpa_ring_stats(bp);
 	return num_stats * bp->cp_nr_rings;
 }
@@ -548,13 +552,19 @@ static void bnxt_get_ethtool_stats(struct net_device *dev,
 		struct bnxt_napi *bnapi = bp->bnapi[i];
 		struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring;
 		__le64 *hw_stats = (__le64 *)cpr->hw_stats;
+		u64 *sw;
 		int k;
 
 		for (k = 0; k < stat_fields; j++, k++)
 			buf[j] = le64_to_cpu(hw_stats[k]);
-		buf[j++] = cpr->rx_l4_csum_errors;
-		buf[j++] = cpr->rx_buf_errors;
-		buf[j++] = cpr->missed_irqs;
+
+		sw = (u64 *)&cpr->sw_stats.rx;
+		for (k = 0; k < ARRAY_SIZE(bnxt_rx_sw_stats_str); j++, k++)
+			buf[j] = sw[k];
+
+		sw = (u64 *)&cpr->sw_stats.cmn;
+		for (k = 0; k < ARRAY_SIZE(bnxt_cmn_sw_stats_str); j++, k++)
+			buf[j] = sw[k];
 
 		bnxt_sw_func_stats[RX_TOTAL_DISCARDS].counter +=
 			le64_to_cpu(cpr->hw_stats->rx_discard_pkts);
@@ -653,10 +663,16 @@ static void bnxt_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
 				buf += ETH_GSTRING_LEN;
 			}
 skip_tpa_stats:
-			num_str = ARRAY_SIZE(bnxt_ring_sw_stats_str);
+			num_str = ARRAY_SIZE(bnxt_rx_sw_stats_str);
+			for (j = 0; j < num_str; j++) {
+				sprintf(buf, "[%d]: %s", i,
+					bnxt_rx_sw_stats_str[j]);
+				buf += ETH_GSTRING_LEN;
+			}
+			num_str = ARRAY_SIZE(bnxt_cmn_sw_stats_str);
 			for (j = 0; j < num_str; j++) {
 				sprintf(buf, "[%d]: %s", i,
-					bnxt_ring_sw_stats_str[j]);
+					bnxt_cmn_sw_stats_str[j]);
 				buf += ETH_GSTRING_LEN;
 			}
 		}