netdev - [PATCH net-next 6/6] bnxt_en: Log if an invalid signal detected on TSIO pin

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Message-Id: <1627495905-17396-7-git-send-email-michael.chan@broadcom.com>
Date:   Wed, 28 Jul 2021 14:11:45 -0400
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, kuba@...nel.org, gospo@...adcom.com,
        richardcochran@...il.com, pavan.chebbi@...adcom.com,
        edwin.peer@...adcom.com
Subject: [PATCH net-next 6/6] bnxt_en: Log if an invalid signal detected on TSIO pin

From: Pavan Chebbi <pavan.chebbi@...adcom.com>

FW can report to driver via ASYNC event if it encountered an
invalid signal on any TSIO PIN. Driver will log this event
for the user to take corrective action.

Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
Reviewed-by: Arvind Susarla <arvind.susarla@...adcom.com>
Reviewed-by: Edwin Peer <edwin.peer@...adcom.com>
Signed-off-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 18 ++++++++++++++++++
 drivers/net/ethernet/broadcom/bnxt/bnxt.h | 10 ++++++++++
 2 files changed, 28 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index f3b606bccfb0..4fe87c214c77 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -278,6 +278,7 @@ static const u16 bnxt_async_events_arr[] = {
 	ASYNC_EVENT_CMPL_EVENT_ID_RING_MONITOR_MSG,
 	ASYNC_EVENT_CMPL_EVENT_ID_ECHO_REQUEST,
 	ASYNC_EVENT_CMPL_EVENT_ID_PPS_TIMESTAMP,
+	ASYNC_EVENT_CMPL_EVENT_ID_ERROR_REPORT,
 };
 
 static struct workqueue_struct *bnxt_pf_wq;
@@ -2043,6 +2044,19 @@ static u16 bnxt_agg_ring_id_to_grp_idx(struct bnxt *bp, u16 ring_id)
 	return INVALID_HW_RING_ID;
 }
 
+static void bnxt_event_error_report(struct bnxt *bp, u32 data1, u32 data2)
+{
+	switch (BNXT_EVENT_ERROR_REPORT_TYPE(data1)) {
+	case ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_INVALID_SIGNAL:
+		netdev_err(bp->dev, "1PPS: Received invalid signal on pin%lu from the external source. Please fix the signal and reconfigure the pin\n",
+			   BNXT_EVENT_INVALID_SIGNAL_DATA(data2));
+		break;
+	default:
+		netdev_err(bp->dev, "FW reported unknown error type\n");
+		break;
+	}
+}
+
 #define BNXT_GET_EVENT_PORT(data)	\
 	((data) &			\
 	 ASYNC_EVENT_CMPL_PORT_CONN_NOT_ALLOWED_EVENT_DATA1_PORT_ID_MASK)
@@ -2207,6 +2221,10 @@ static int bnxt_async_event_process(struct bnxt *bp,
 		bnxt_ptp_pps_event(bp, data1, data2);
 		goto async_event_process_exit;
 	}
+	case ASYNC_EVENT_CMPL_EVENT_ID_ERROR_REPORT: {
+		bnxt_event_error_report(bp, data1, data2);
+		goto async_event_process_exit;
+	}
 	default:
 		goto async_event_process_exit;
 	}
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index aa733f1b235a..e379c48c1df9 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -496,6 +496,16 @@ struct rx_tpa_end_cmp_ext {
 	!!((data1) &							\
 	   ASYNC_EVENT_CMPL_ERROR_RECOVERY_EVENT_DATA1_FLAGS_RECOVERY_ENABLED)
 
+#define BNXT_EVENT_ERROR_REPORT_TYPE(data1)				\
+	(((data1) &							\
+	  ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_MASK) >>\
+	 ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_SFT)
+
+#define BNXT_EVENT_INVALID_SIGNAL_DATA(data2)				\
+	(((data2) &							\
+	  ASYNC_EVENT_CMPL_ERROR_REPORT_INVALID_SIGNAL_EVENT_DATA2_PIN_ID_MASK) >>\
+	 ASYNC_EVENT_CMPL_ERROR_REPORT_INVALID_SIGNAL_EVENT_DATA2_PIN_ID_SFT)
+
 struct nqe_cn {
 	__le16	type;
 	#define NQ_CN_TYPE_MASK           0x3fUL
-- 
2.18.1


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