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| author |   Guenter Roeck <linux@roeck-us.net> | 2019-11-06 06:35:18 -0800 |
|---|---|---|
| committer |   Keith Busch <kbusch@kernel.org> | 2019-11-12 01:57:35 +0900 |
| commit | 400b6a7b13a3fd71cff087139ce45dd1e5fff444 (patch) | |
| tree | 6b7ba2adfb9a7157f523800b1831d6589f5d9214 /drivers/nvme/host/core.c | |
| parent | nvme: Fix parsing of ANA log page (diff) | |
| download | linux-dev-400b6a7b13a3fd71cff087139ce45dd1e5fff444.tar.xz linux-dev-400b6a7b13a3fd71cff087139ce45dd1e5fff444.zip | |
nvme: Add hardware monitoring support
nvme devices report temperature information in the controller information
(for limits) and in the smart log. Currently, the only means to retrieve
this information is the nvme command line interface, which requires
super-user privileges.
At the same time, it would be desirable to be able to use NVMe temperature
information for thermal control.
This patch adds support to read NVMe temperatures from the kernel using the
hwmon API and adds temperature zones for NVMe drives. The thermal subsystem
can use this information to set thermal policies, and userspace can access
it using libsensors and/or the "sensors" command.
Example output from the "sensors" command:
nvme0-pci-0100
Adapter: PCI adapter
Composite: +39.0°C (high = +85.0°C, crit = +85.0°C)
Sensor 1: +39.0°C
Sensor 2: +41.0°C
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/nvme/host/core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index b4214e54f2d2..4be64703aa47 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2760,6 +2760,9 @@ int nvme_init_identify(struct nvme_ctrl *ctrl) ctrl->oncs = le16_to_cpu(id->oncs); ctrl->mtfa = le16_to_cpu(id->mtfa); ctrl->oaes = le32_to_cpu(id->oaes); + ctrl->wctemp = le16_to_cpu(id->wctemp); + ctrl->cctemp = le16_to_cpu(id->cctemp); + atomic_set(&ctrl->abort_limit, id->acl + 1); ctrl->vwc = id->vwc; if (id->mdts) @@ -2859,6 +2862,9 @@ int nvme_init_identify(struct nvme_ctrl *ctrl) if (ret < 0) return ret; + if (!ctrl->identified) + nvme_hwmon_init(ctrl); + ctrl->identified = true; return 0; |