From 95de0faf12d4a226d77ce9fbc52df83e63904c3b Mon Sep 17 00:00:00 2001
From: Somnath Kotur <somnath.kotur@broadcom.com>
Date: Mon, 12 Jul 2021 13:34:35 +0530
Subject: [PATCH] net/bnxt: handle pause storm event

FW has been modified to send a new async event when it detects
a pause storm. Register for this new event and log it upon receipt.

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt.h      |  5 +++++
 drivers/net/bnxt/bnxt_cpr.c  | 19 +++++++++++++++++++
 drivers/net/bnxt/bnxt_hwrm.c |  3 ++-
 drivers/net/bnxt/bnxt_hwrm.h |  2 ++
 4 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index 702ecac629..494a1eff37 100644
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -157,6 +157,11 @@
 #define	BNXT_DEFAULT_VNIC_CHANGE_VF_ID_SFT		\
 	HWRM_ASYNC_EVENT_CMPL_DEFAULT_VNIC_CHANGE_EVENT_DATA1_VF_ID_SFT
 
+#define BNXT_EVENT_ERROR_REPORT_TYPE(data1)				\
+	(((data1) &							\
+	  HWRM_ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_MASK)  >>\
+	 HWRM_ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_SFT)
+
 #define BNXT_HWRM_CMD_TO_FORWARD(cmd)	\
 		(bp->pf->vf_req_fwd[(cmd) / 32] |= (1 << ((cmd) % 32)))
 
diff --git a/drivers/net/bnxt/bnxt_cpr.c b/drivers/net/bnxt/bnxt_cpr.c
index 02006f6671..12230dcea4 100644
--- a/drivers/net/bnxt/bnxt_cpr.c
+++ b/drivers/net/bnxt/bnxt_cpr.c
@@ -91,6 +91,22 @@ bnxt_process_default_vnic_change(struct bnxt *bp,
 	bnxt_rep_dev_start_op(eth_dev);
 }
 
+static void bnxt_handle_event_error_report(struct bnxt *bp,
+					   uint32_t data1,
+					   uint32_t data2)
+{
+	switch (BNXT_EVENT_ERROR_REPORT_TYPE(data1)) {
+	case HWRM_ASYNC_EVENT_CMPL_ERROR_REPORT_BASE_EVENT_DATA1_ERROR_TYPE_PAUSE_STORM:
+		PMD_DRV_LOG(WARNING, "Port:%d Pause Storm detected!\n",
+			    bp->eth_dev->data->port_id);
+		break;
+	default:
+		PMD_DRV_LOG(INFO, "FW reported unknown error type data1 %d"
+			    " data2: %d\n", data1, data2);
+		break;
+	}
+}
+
 /*
  * Async event handling
  */
@@ -215,6 +231,9 @@ void bnxt_handle_async_event(struct bnxt *bp,
 		if (bp->recovery_info)
 			bnxt_hwrm_fw_echo_reply(bp, data1, data2);
 		break;
+	case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_ERROR_REPORT:
+		bnxt_handle_event_error_report(bp, data1, data2);
+		break;
 	default:
 		PMD_DRV_LOG(DEBUG, "handle_async_event id = 0x%x\n", event_id);
 		break;
diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index d583839cb0..e6c46d46de 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -1085,7 +1085,8 @@ int bnxt_hwrm_func_driver_register(struct bnxt *bp)
 		rte_cpu_to_le_32(ASYNC_CMPL_EVENT_ID_DEFAULT_VNIC_CHANGE);
 
 	req.async_event_fwd[2] |=
-		rte_cpu_to_le_32(ASYNC_CMPL_EVENT_ID_ECHO_REQUEST);
+		rte_cpu_to_le_32(ASYNC_CMPL_EVENT_ID_ECHO_REQUEST |
+				 ASYNC_CMPL_EVENT_ID_ERROR_REPORT);
 
 	rc = bnxt_hwrm_send_message(bp, &req, sizeof(req), BNXT_USE_CHIMP_MB);
 
diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index 80e3128140..b311ff59c0 100644
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -37,6 +37,8 @@ struct hwrm_func_qstats_output;
 	(1 << (HWRM_ASYNC_EVENT_CMPL_EVENT_ID_DEFAULT_VNIC_CHANGE - 32))
 #define	ASYNC_CMPL_EVENT_ID_ECHO_REQUEST	\
 	(1 << (HWRM_ASYNC_EVENT_CMPL_EVENT_ID_ECHO_REQUEST - 64))
+#define	ASYNC_CMPL_EVENT_ID_ERROR_REPORT	\
+	(1 << (HWRM_ASYNC_EVENT_CMPL_EVENT_ID_ERROR_REPORT - 64))
 
 #define HWRM_QUEUE_SERVICE_PROFILE_LOSSY \
 	HWRM_QUEUE_QPORTCFG_OUTPUT_QUEUE_ID0_SERVICE_PROFILE_LOSSY
-- 
2.20.1