linux-pci.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Ben Widawsky <ben.widawsky@intel.com>
To: David Rientjes <rientjes@google.com>
Cc: linux-cxl@vger.kernel.org,
	Dan Williams <dan.j.williams@intel.com>,
	linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-nvdimm@lists.01.org, linux-pci@vger.kernel.org,
	Bjorn Helgaas <helgaas@kernel.org>,
	Chris Browy <cbrowy@avery-design.com>,
	Christoph Hellwig <hch@infradead.org>,
	Ira Weiny <ira.weiny@intel.com>, Jon Masters <jcm@jonmasters.org>,
	Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	Rafael Wysocki <rafael.j.wysocki@intel.com>,
	Randy Dunlap <rdunlap@infradead.org>,
	Vishal Verma <vishal.l.verma@intel.com>,
	daniel.lll@alibaba-inc.com,
	"John Groves (jgroves)" <jgroves@micron.com>,
	"Kelley, Sean V" <sean.v.kelley@intel.com>
Subject: Re: [PATCH 05/14] cxl/mem: Register CXL memX devices
Date: Mon, 1 Feb 2021 09:10:51 -0800	[thread overview]
Message-ID: <20210201171051.m3cbr3udczxwghqh@intel.com> (raw)
In-Reply-To: <ecd93422-b272-2b76-1ec-cf6af744ae@google.com>

On 21-01-30 15:52:01, David Rientjes wrote:
> On Fri, 29 Jan 2021, Ben Widawsky wrote:
> 
> > diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl
> > new file mode 100644
> > index 000000000000..fe7b87eba988
> > --- /dev/null
> > +++ b/Documentation/ABI/testing/sysfs-bus-cxl
> > @@ -0,0 +1,26 @@
> > +What:		/sys/bus/cxl/devices/memX/firmware_version
> > +Date:		December, 2020
> > +KernelVersion:	v5.12
> > +Contact:	linux-cxl@vger.kernel.org
> > +Description:
> > +		(RO) "FW Revision" string as reported by the Identify
> > +		Memory Device Output Payload in the CXL-2.0
> > +		specification.
> > +
> > +What:		/sys/bus/cxl/devices/memX/ram/size
> > +Date:		December, 2020
> > +KernelVersion:	v5.12
> > +Contact:	linux-cxl@vger.kernel.org
> > +Description:
> > +		(RO) "Volatile Only Capacity" as reported by the
> > +		Identify Memory Device Output Payload in the CXL-2.0
> > +		specification.
> > +
> > +What:		/sys/bus/cxl/devices/memX/pmem/size
> > +Date:		December, 2020
> > +KernelVersion:	v5.12
> > +Contact:	linux-cxl@vger.kernel.org
> > +Description:
> > +		(RO) "Persistent Only Capacity" as reported by the
> > +		Identify Memory Device Output Payload in the CXL-2.0
> > +		specification.
> 
> Aren't volatile and persistent capacities expressed in multiples of 256MB?

As of the spec today, volatile and persistent capacities are required to be
in multiples of 256MB, however, future specs may not have such a requirement and
I think keeping sysfs ABI easily forward portable makes sense.

  reply	other threads:[~2021-02-01 17:11 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-30  0:24 [PATCH 00/14] CXL 2.0 Support Ben Widawsky
2021-01-30  0:24 ` [PATCH 01/14] cxl/mem: Introduce a driver for CXL-2.0-Type-3 endpoints Ben Widawsky
2021-01-30 23:51   ` David Rientjes
2021-02-01 17:21   ` Jonathan Cameron
2021-02-01 17:34   ` Konrad Rzeszutek Wilk
2021-02-02 17:58     ` Christoph Hellwig
2021-02-02 18:00   ` Christoph Hellwig
2021-01-30  0:24 ` [PATCH 02/14] cxl/mem: Map memory device registers Ben Widawsky
2021-01-30 23:51   ` David Rientjes
2021-02-01 16:46     ` Ben Widawsky
2021-02-01 18:19       ` Jonathan Cameron
2021-02-01 17:36   ` Konrad Rzeszutek Wilk
2021-02-02 18:04   ` Christoph Hellwig
2021-02-02 18:31     ` Ben Widawsky
2021-02-03 17:12       ` Christoph Hellwig
2021-01-30  0:24 ` [PATCH 03/14] cxl/mem: Find device capabilities Ben Widawsky
2021-01-30 23:51   ` David Rientjes
2021-02-01 16:53     ` Ben Widawsky
2021-02-01 21:51       ` David Rientjes
2021-02-01 21:58         ` Ben Widawsky
2021-02-01 22:23           ` David Rientjes
2021-02-01 22:28             ` Ben Widawsky
2021-02-01 22:33               ` Ben Widawsky
2021-02-01 22:45                 ` David Rientjes
2021-02-01 22:50                   ` Ben Widawsky
2021-02-01 23:09                     ` David Rientjes
2021-02-01 23:17                       ` Ben Widawsky
2021-02-01 23:58                         ` David Rientjes
2021-02-02  0:11                           ` Ben Widawsky
2021-02-02  0:14                             ` Dan Williams
2021-02-02  1:09                               ` David Rientjes
2021-02-01 22:02         ` Dan Williams
2021-02-01 17:41   ` Konrad Rzeszutek Wilk
2021-02-01 17:50     ` Ben Widawsky
2021-02-01 18:08       ` Konrad Rzeszutek Wilk
2021-02-02 18:10   ` Christoph Hellwig
2021-02-02 18:24     ` Ben Widawsky
2021-02-03 17:15       ` Christoph Hellwig
2021-02-03 17:23         ` Ben Widawsky
2021-02-03 21:23           ` Dan Williams
2021-02-04  7:16             ` Christoph Hellwig
2021-02-04 15:29               ` Ben Widawsky
2021-01-30  0:24 ` [PATCH 04/14] cxl/mem: Implement polled mode mailbox Ben Widawsky
2021-01-30 23:51   ` David Rientjes
2021-02-01 20:00     ` Dan Williams
2021-02-02 22:57       ` Ben Widawsky
2021-02-02 23:54         ` Dan Williams
2021-02-03  0:54           ` Ben Widawsky
2021-02-02 22:50     ` Ben Widawsky
2021-02-01 17:54   ` Konrad Rzeszutek Wilk
2021-02-01 19:13     ` Ben Widawsky
2021-02-01 19:28       ` Dan Williams
     [not found]         ` <SN6PR08MB46052FE9BC20A747CACD8F50D1B39@SN6PR08MB4605.namprd08.prod.outlook.com>
2021-02-04 22:24           ` [EXT] " Ben Widawsky
2021-01-30  0:24 ` [PATCH 05/14] cxl/mem: Register CXL memX devices Ben Widawsky
2021-01-30  0:31   ` Dan Williams
2021-01-30 23:52   ` David Rientjes
2021-02-01 17:10     ` Ben Widawsky [this message]
2021-02-01 21:53       ` David Rientjes
2021-02-01 21:55         ` Dan Williams
2021-02-02 18:13   ` Christoph Hellwig
2021-01-30  0:24 ` [PATCH 06/14] cxl/mem: Add basic IOCTL interface Ben Widawsky
2021-02-02 18:15   ` Christoph Hellwig
2021-02-02 18:33     ` Ben Widawsky
2021-01-30  0:24 ` [PATCH 07/14] cxl/mem: Add send command Ben Widawsky
2021-02-01 18:15   ` Konrad Rzeszutek Wilk
2021-02-02 23:08     ` Ben Widawsky
2021-01-30  0:24 ` [PATCH 08/14] taint: add taint for direct hardware access Ben Widawsky
2021-02-01 18:18   ` Konrad Rzeszutek Wilk
2021-02-01 18:34     ` Ben Widawsky
2021-02-01 19:01       ` Dan Williams
2021-02-02  2:49         ` Konrad Rzeszutek Wilk
2021-02-02 17:46           ` Dan Williams
2021-02-08 22:00   ` Dan Williams
2021-02-08 22:09     ` Kees Cook
2021-02-08 23:05       ` Ben Widawsky
2021-02-08 23:36       ` Dan Williams
2021-02-09  1:03         ` Dan Williams
2021-02-09  3:36           ` Ben Widawsky
2021-01-30  0:24 ` [PATCH 09/14] cxl/mem: Add a "RAW" send command Ben Widawsky
2021-02-01 18:24   ` Konrad Rzeszutek Wilk
2021-02-01 19:27     ` Ben Widawsky
2021-02-01 19:34       ` Konrad Rzeszutek Wilk
2021-02-01 21:20         ` Dan Williams
2021-01-30  0:24 ` [PATCH 10/14] cxl/mem: Create concept of enabled commands Ben Widawsky
2021-01-30  0:24 ` [PATCH 11/14] cxl/mem: Use CEL for enabling commands Ben Widawsky
2021-01-30  0:24 ` [PATCH 12/14] cxl/mem: Add set of informational commands Ben Widawsky
2021-01-30  0:24 ` [PATCH 13/14] cxl/mem: Add limited Get Log command (0401h) Ben Widawsky
2021-02-01 18:28   ` Konrad Rzeszutek Wilk
2021-02-02 23:51     ` Ben Widawsky
2021-02-02 23:57       ` Dan Williams
2021-02-03 17:16         ` Ben Widawsky
2021-02-03 18:14           ` Konrad Rzeszutek Wilk
2021-02-03 20:31             ` Dan Williams
2021-02-04 18:55               ` Ben Widawsky
2021-02-04 21:01                 ` Dan Williams
2021-01-30  0:24 ` [PATCH 14/14] MAINTAINERS: Add maintainers of the CXL driver Ben Widawsky

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210201171051.m3cbr3udczxwghqh@intel.com \
    --to=ben.widawsky@intel.com \
    --cc=Jonathan.Cameron@huawei.com \
    --cc=cbrowy@avery-design.com \
    --cc=dan.j.williams@intel.com \
    --cc=daniel.lll@alibaba-inc.com \
    --cc=hch@infradead.org \
    --cc=helgaas@kernel.org \
    --cc=ira.weiny@intel.com \
    --cc=jcm@jonmasters.org \
    --cc=jgroves@micron.com \
    --cc=linux-acpi@vger.kernel.org \
    --cc=linux-cxl@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-nvdimm@lists.01.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=rafael.j.wysocki@intel.com \
    --cc=rdunlap@infradead.org \
    --cc=rientjes@google.com \
    --cc=sean.v.kelley@intel.com \
    --cc=vishal.l.verma@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).