From d752d0536c979068084e0c60ff506c07e1cf613e Mon Sep 17 00:00:00 2001
From: Michael Chan <michael.chan@broadcom.com>
Date: Mon, 27 Jul 2020 05:40:41 -0400
Subject: [PATCH] bnxt_en: Retrieve hardware counter masks from firmware if
 available.

Newer firmware has a new call HWRM_FUNC_QSTATS_EXT to retrieve the
masks of all ring counters.  Make this call when supported to
initialize the hardware masks of all ring counters.  If the call
is not available, assume 48-bit ring counter masks on P5 chips.

Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 64 +++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index b676d78e5c14..58792fddf510 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -3750,6 +3750,69 @@ static int bnxt_alloc_stats_mem(struct bnxt *bp, struct bnxt_stats_mem *stats,
 	return -ENOMEM;
 }
 
+static void bnxt_fill_masks(u64 *mask_arr, u64 mask, int count)
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		mask_arr[i] = mask;
+}
+
+static void bnxt_copy_hw_masks(u64 *mask_arr, __le64 *hw_mask_arr, int count)
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		mask_arr[i] = le64_to_cpu(hw_mask_arr[i]);
+}
+
+static int bnxt_hwrm_func_qstat_ext(struct bnxt *bp,
+				    struct bnxt_stats_mem *stats)
+{
+	struct hwrm_func_qstats_ext_output *resp = bp->hwrm_cmd_resp_addr;
+	struct hwrm_func_qstats_ext_input req = {0};
+	__le64 *hw_masks;
+	int rc;
+
+	if (!(bp->fw_cap & BNXT_FW_CAP_EXT_HW_STATS_SUPPORTED) ||
+	    !(bp->flags & BNXT_FLAG_CHIP_P5))
+		return -EOPNOTSUPP;
+
+	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_QSTATS_EXT, -1, -1);
+	req.flags = FUNC_QSTATS_EXT_REQ_FLAGS_COUNTER_MASK;
+	mutex_lock(&bp->hwrm_cmd_lock);
+	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+	if (rc)
+		goto qstat_exit;
+
+	hw_masks = &resp->rx_ucast_pkts;
+	bnxt_copy_hw_masks(stats->hw_masks, hw_masks, stats->len / 8);
+
+qstat_exit:
+	mutex_unlock(&bp->hwrm_cmd_lock);
+	return rc;
+}
+
+static void bnxt_init_stats(struct bnxt *bp)
+{
+	struct bnxt_napi *bnapi = bp->bnapi[0];
+	struct bnxt_cp_ring_info *cpr;
+	struct bnxt_stats_mem *stats;
+	u64 mask;
+	int rc;
+
+	cpr = &bnapi->cp_ring;
+	stats = &cpr->stats;
+	rc = bnxt_hwrm_func_qstat_ext(bp, stats);
+	if (rc) {
+		if (bp->flags & BNXT_FLAG_CHIP_P5)
+			mask = (1ULL << 48) - 1;
+		else
+			mask = -1ULL;
+		bnxt_fill_masks(stats->hw_masks, mask, stats->len / 8);
+	}
+}
+
 static void bnxt_free_port_stats(struct bnxt *bp)
 {
 	bp->flags &= ~BNXT_FLAG_PORT_STATS;
@@ -4037,6 +4100,7 @@ static int bnxt_alloc_mem(struct bnxt *bp, bool irq_re_init)
 		rc = bnxt_alloc_stats(bp);
 		if (rc)
 			goto alloc_mem_err;
+		bnxt_init_stats(bp);
 
 		rc = bnxt_alloc_ntp_fltrs(bp);
 		if (rc)