netdev - [PATCH v2 net-next 09/11] net: qed: introduce critical fan failure handler

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Date:   Thu, 14 May 2020 12:57:25 +0300
From:   Igor Russkikh <irusskikh@...vell.com>
To:     <netdev@...r.kernel.org>
CC:     "David S . Miller" <davem@...emloft.net>,
        Ariel Elior <aelior@...vell.com>,
        Michal Kalderon <mkalderon@...vell.com>,
        Denis Bolotin <dbolotin@...vell.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Igor Russkikh <irusskikh@...vell.com>,
        Ariel Elior <ariel.elior@...vell.com>,
        "Michal Kalderon" <michal.kalderon@...vell.com>
Subject: [PATCH v2 net-next 09/11] net: qed: introduce critical fan failure handler

Fan failure is sent by firmware, driver reacts on this error with
newly introduced notification path. It will collect dump and shut down
the device to prevent physical breakage

Signed-off-by: Ariel Elior <ariel.elior@...vell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@...vell.com>
Signed-off-by: Igor Russkikh <irusskikh@...vell.com>
---
 drivers/net/ethernet/qlogic/qed/qed_hsi.h |  2 +-
 drivers/net/ethernet/qlogic/qed/qed_mcp.c | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_hsi.h b/drivers/net/ethernet/qlogic/qed/qed_hsi.h
index 21d53b00c2e6..ab042b835797 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_hsi.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_hsi.h
@@ -12761,7 +12761,7 @@ enum MFW_DRV_MSG_TYPE {
 	MFW_DRV_MSG_GET_FCOE_STATS,
 	MFW_DRV_MSG_GET_ISCSI_STATS,
 	MFW_DRV_MSG_GET_RDMA_STATS,
-	MFW_DRV_MSG_BW_UPDATE10,
+	MFW_DRV_MSG_FAILURE_DETECTED,
 	MFW_DRV_MSG_TRANSCEIVER_STATE_CHANGE,
 	MFW_DRV_MSG_BW_UPDATE11,
 	MFW_DRV_MSG_RESERVED,
diff --git a/drivers/net/ethernet/qlogic/qed/qed_mcp.c b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
index 62be13d49dd8..0058e804efc3 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_mcp.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
@@ -1706,6 +1706,17 @@ static void qed_mcp_update_stag(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 		    &resp, &param);
 }
 
+static void qed_mcp_handle_fan_failure(struct qed_hwfn *p_hwfn,
+				       struct qed_ptt *p_ptt)
+{
+	/* A single notification should be sent to upper driver in CMT mode */
+	if (p_hwfn != QED_LEADING_HWFN(p_hwfn->cdev))
+		return;
+
+	qed_hw_err_notify(p_hwfn, p_ptt, QED_HW_ERR_FAN_FAIL,
+			  "Fan failure was detected on the network interface card and it's going to be shut down.\n");
+}
+
 void qed_mcp_read_ufp_config(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 {
 	struct public_func shmem_info;
@@ -1852,6 +1863,9 @@ int qed_mcp_handle_events(struct qed_hwfn *p_hwfn,
 		case MFW_DRV_MSG_S_TAG_UPDATE:
 			qed_mcp_update_stag(p_hwfn, p_ptt);
 			break;
+		case MFW_DRV_MSG_FAILURE_DETECTED:
+			qed_mcp_handle_fan_failure(p_hwfn, p_ptt);
+			break;
 		case MFW_DRV_MSG_GET_TLV_REQ:
 			qed_mfw_tlv_req(p_hwfn);
 			break;
-- 
2.17.1