linux-kernel - [PATCH v4 5/8] staging: qlge: support force_coredump option for devlink health dump

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Message-Id: <20210123104613.38359-6-coiby.xu@gmail.com>
Date:   Sat, 23 Jan 2021 18:46:10 +0800
From:   Coiby Xu <coiby.xu@...il.com>
To:     devel@...verdev.osuosl.org
Cc:     Benjamin Poirier <benjamin.poirier@...il.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Shung-Hsi Yu <shung-hsi.yu@...e.com>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        GR-Linux-NIC-Dev@...vell.com, Manish Chopra <manishc@...vell.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        netdev@...r.kernel.org (open list:QLOGIC QLGE 10Gb ETHERNET DRIVER),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4 5/8] staging: qlge: support force_coredump option for devlink health dump

With force_coredump module parameter set, devlink health dump will
reset the MPI RISC first which takes 5 secs to be finished.

Note that only NIC function that owns the firmware can do the
force_dumping. Otherwise devlink will receive an EPERM error.

Signed-off-by: Coiby Xu <coiby.xu@...il.com>
---
 drivers/staging/qlge/qlge_devlink.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/staging/qlge/qlge_devlink.c b/drivers/staging/qlge/qlge_devlink.c
index bf7d75ed5eae..c6ef5163e241 100644
--- a/drivers/staging/qlge/qlge_devlink.c
+++ b/drivers/staging/qlge/qlge_devlink.c
@@ -56,10 +56,23 @@ static int qlge_reporter_coredump(struct devlink_health_reporter *reporter,
 
 	struct qlge_adapter *qdev = devlink_health_reporter_priv(reporter);
 	struct qlge_mpi_coredump *dump;
+	wait_queue_head_t wait;
 
 	if (!netif_running(qdev->ndev))
 		return 0;
 
+	if (test_bit(QL_FRC_COREDUMP, &qdev->flags)) {
+		if (qlge_own_firmware(qdev)) {
+			qlge_queue_fw_error(qdev);
+			init_waitqueue_head(&wait);
+			wait_event_timeout(wait, 0, 5 * HZ);
+		} else {
+			netif_err(qdev, ifup, qdev->ndev,
+				  "Force Coredump failed because this NIC function doesn't own the firmware\n");
+			return -EPERM;
+		}
+	}
+
 	dump = kvmalloc(sizeof(*dump), GFP_KERNEL);
 	if (!dump)
 		return -ENOMEM;
-- 
2.29.2