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From: Akinobu Mita <akinobu.mita@gmail.com>
To: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Akinobu Mita <akinobu.mita@gmail.com>,
	Johannes Berg <johannes@sipsolutions.net>,
	Keith Busch <keith.busch@intel.com>, Jens Axboe <axboe@fb.com>,
	Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
	Minwoo Im <minwoo.im.dev@gmail.com>,
	Kenneth Heitke <kenneth.heitke@intel.com>
Subject: [PATCH v3 7/7] nvme-pci: enable to trigger device coredump by hand
Date: Mon, 13 May 2019 00:54:17 +0900	[thread overview]
Message-ID: <1557676457-4195-8-git-send-email-akinobu.mita@gmail.com> (raw)
In-Reply-To: <1557676457-4195-1-git-send-email-akinobu.mita@gmail.com>

This provides a way to trigger the nvme device coredump by writing
anything to /sys/devices/.../coredump attribute.

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Minwoo Im <minwoo.im.dev@gmail.com>
Cc: Kenneth Heitke <kenneth.heitke@intel.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
* v3
- Extracted from 'add device coredump infrastructure' patch
- Avoid deadlock in .coredump callback

 drivers/nvme/host/pci.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 6522592..fad5395 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -3288,6 +3288,14 @@ static void nvme_coredump_complete(struct nvme_dev *dev)
 	nvme_coredump_clear(dev);
 }
 
+static void nvme_coredump(struct device *dev)
+{
+	struct nvme_dev *ndev = dev_get_drvdata(dev);
+
+	nvme_dev_disable(ndev, false, true);
+	nvme_reset_ctrl_sync(&ndev->ctrl);
+}
+
 #else
 
 static void nvme_coredump_init(struct nvme_dev *dev)
@@ -3302,6 +3310,10 @@ static void nvme_coredump_complete(struct nvme_dev *dev)
 {
 }
 
+static void nvme_coredump(struct device *dev)
+{
+}
+
 #endif /* CONFIG_DEV_COREDUMP */
 
 static pci_ers_result_t nvme_error_detected(struct pci_dev *pdev,
@@ -3409,6 +3421,7 @@ static struct pci_driver nvme_driver = {
 	.shutdown	= nvme_shutdown,
 	.driver		= {
 		.pm	= &nvme_dev_pm_ops,
+		.coredump = nvme_coredump,
 	},
 	.sriov_configure = pci_sriov_configure_simple,
 	.err_handler	= &nvme_err_handler,
-- 
2.7.4


  parent reply	other threads:[~2019-05-12 15:55 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-12 15:54 [PATCH v3 0/7] nvme-pci: support device coredump Akinobu Mita
2019-05-12 15:54 ` [PATCH v3 1/7] devcoredump: use memory_read_from_buffer Akinobu Mita
2019-05-13 15:28   ` Chaitanya Kulkarni
2019-05-12 15:54 ` [PATCH v3 2/7] devcoredump: fix typo in comment Akinobu Mita
2019-05-13 15:24   ` Chaitanya Kulkarni
2019-05-12 15:54 ` [PATCH v3 3/7] devcoredump: allow to create several coredump files in one device Akinobu Mita
2019-05-12 15:54 ` [PATCH v3 4/7] nvme: add basic facility to get telemetry log page Akinobu Mita
2019-05-13 15:34   ` Chaitanya Kulkarni
2019-05-14 14:04     ` Akinobu Mita
2019-05-12 15:54 ` [PATCH v3 5/7] nvme-pci: add device coredump infrastructure Akinobu Mita
2019-05-13 13:50   ` Keith Busch
2019-05-13 15:01     ` Akinobu Mita
2019-05-13 14:02   ` Christoph Hellwig
2019-05-13 15:01     ` Akinobu Mita
2019-05-12 15:54 ` [PATCH v3 6/7] nvme-pci: trigger device coredump on command timeout Akinobu Mita
2019-05-13 13:52   ` Keith Busch
2019-05-12 15:54 ` Akinobu Mita [this message]
     [not found] ` <CGME20190512155533epcas4p110edff15ebf5b2efae32e43f0f10ab59@epcms2p5>
2019-05-13  7:41   ` Minwoo Im
2019-05-13 14:59     ` Akinobu Mita
     [not found] ` <CGME20190512155540epcas4p14c15eb86b08dcd281e9a93a4fc190800@epcms2p1>
2019-05-13  7:46   ` [PATCH v3 5/7] nvme-pci: add device coredump infrastructure Minwoo Im
2019-05-13 15:23     ` Chaitanya Kulkarni
2019-05-14 14:06       ` Akinobu Mita

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