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From: Akinobu Mita <akinobu.mita@gmail.com>
To: "Heitke, Kenneth" <kenneth.heitke@intel.com>
Cc: linux-nvme@lists.infradead.org,
	LKML <linux-kernel@vger.kernel.org>, Jens Axboe <axboe@fb.com>,
	Sagi Grimberg <sagi@grimberg.me>,
	Keith Busch <keith.busch@intel.com>,
	Minwoo Im <minwoo.im.dev@gmail.com>,
	Johannes Berg <johannes@sipsolutions.net>,
	Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v2 4/7] nvme.h: add telemetry log page definisions
Date: Thu, 9 May 2019 00:42:20 +0900	[thread overview]
Message-ID: <CAC5umyjDn579iu4V1pXhKJ_PUQdNgY3LBZWgWgqQw_ZoNd88FQ@mail.gmail.com> (raw)
In-Reply-To: <81c0d1bd-c117-3fcb-959b-4507504021dd@intel.com>

2019年5月8日(水) 2:28 Heitke, Kenneth <kenneth.heitke@intel.com>:
>
>
>
> On 5/7/2019 10:58 AM, Akinobu Mita wrote:
> > Copy telemetry log page definisions from nvme-cli.
> >
> > 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>
> > Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
> > ---
> > * v2
> > - New patch in this version.
> >
> >   include/linux/nvme.h | 23 +++++++++++++++++++++++
> >   1 file changed, 23 insertions(+)
> >
> > diff --git a/include/linux/nvme.h b/include/linux/nvme.h
> > index c40720c..5217fe4 100644
> > --- a/include/linux/nvme.h
> > +++ b/include/linux/nvme.h
> > @@ -396,6 +396,28 @@ enum {
> >       NVME_NIDT_UUID          = 0x03,
> >   };
> >
> > +/* Derived from 1.3a Figure 101: Get Log Page – Telemetry Host
> > + * -Initiated Log (Log Identifier 07h)
> > + */
> > +struct nvme_telemetry_log_page_hdr {
> > +     __u8    lpi; /* Log page identifier */
> > +     __u8    rsvd[4];
> > +     __u8    iee_oui[3];
> > +     __le16  dalb1; /* Data area 1 last block */
> > +     __le16  dalb2; /* Data area 2 last block */
> > +     __le16  dalb3; /* Data area 3 last block */
> > +     __u8    rsvd1[368]; /* TODO verify */
>
> Remove the TODO

OK.

> > +     __u8    ctrlavail; /* Controller initiated data avail?*/
> > +     __u8    ctrldgn; /* Controller initiated telemetry Data Gen # */
> > +     __u8    rsnident[128];
> > +     /* We'll have to double fetch so we can get the header,
> > +      * parse dalb1->3 determine how much size we need for the
> > +      * log then alloc below. Or just do a secondary non-struct
> > +      * allocation.
> > +      */
>
> This comment isn't necessary. You usually can't read the entire
> telemetry log at once and the header is a fixed size. You would likely
> just read the header followed by reads of the different data areas.

This comment is derived from nvme-cli.  So firstly, I'll send a patch
for nvme-cli.  If the changes are accepted, I'll update this comment, too.

> > +     __u8    telemetry_dataarea[0];
> > +};
> > +
> >   struct nvme_smart_log {
> >       __u8                    critical_warning;
> >       __u8                    temperature[2];
> > @@ -832,6 +854,7 @@ enum {
> >       NVME_LOG_FW_SLOT        = 0x03,
> >       NVME_LOG_CHANGED_NS     = 0x04,
> >       NVME_LOG_CMD_EFFECTS    = 0x05,
> > +     NVME_LOG_TELEMETRY_CTRL = 0x08,
> >       NVME_LOG_ANA            = 0x0c,
> >       NVME_LOG_DISC           = 0x70,
> >       NVME_LOG_RESERVATION    = 0x80,
> >

  reply	other threads:[~2019-05-08 15:42 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-07 16:58 [PATCH v2 0/7] nvme-pci: support device coredump Akinobu Mita
2019-05-07 16:58 ` [PATCH v2 1/7] devcoredump: use memory_read_from_buffer Akinobu Mita
2019-05-07 16:58 ` [PATCH v2 2/7] devcoredump: fix typo in comment Akinobu Mita
2019-05-07 16:58 ` [PATCH v2 3/7] devcoredump: allow to create several coredump files in one device Akinobu Mita
2019-05-07 17:35   ` Heitke, Kenneth
2019-05-08 15:40     ` Akinobu Mita
2019-05-07 16:58 ` [PATCH v2 4/7] nvme.h: add telemetry log page definisions Akinobu Mita
2019-05-07 17:28   ` Heitke, Kenneth
2019-05-08 15:42     ` Akinobu Mita [this message]
2019-05-07 17:52   ` Heitke, Kenneth
2019-05-08 15:54     ` Akinobu Mita
2019-05-07 16:58 ` [PATCH v2 5/7] nvme: add facility to check log page attributes Akinobu Mita
2019-05-07 16:58 ` [PATCH v2 6/7] nvme-pci: add device coredump support Akinobu Mita
2019-05-07 17:07   ` Keith Busch
2019-05-07 17:44   ` Heitke, Kenneth
2019-05-07 20:31   ` Heitke, Kenneth
2019-05-07 21:22     ` Keith Busch
2019-05-08 15:56       ` Akinobu Mita
     [not found]   ` <CGME20190507171318epcas5p129bb73b39447d62a7d266ed461687488@epcms2p3>
2019-05-08  0:25     ` Minwoo Im
2019-05-08 16:02       ` Akinobu Mita
2019-05-07 16:58 ` [PATCH v2 7/7] nvme-pci: trigger device coredump on command timeout Akinobu Mita
2019-05-07 17:43 ` [PATCH v2 0/7] nvme-pci: support device coredump Heitke, Kenneth

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