linux-kernel - RE: [PATCH v3 1/2] acpi/nfit: Update nfit driver to comply with ACPI 6.1

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Date:   Tue, 19 Jun 2018 14:31:28 +0000
From:   "Elliott, Robert (Persistent Memory)" <elliott@....com>
To:     'Dan Williams' <dan.j.williams@...el.com>
CC:     "Kani, Toshi" <toshi.kani@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        "Moore, Robert" <robert.moore@...el.com>,
        "Li, Juston" <juston.li@...el.com>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: RE: [PATCH v3 1/2] acpi/nfit: Update nfit driver to comply with ACPI
 6.1



> -----Original Message-----
> From: Dan Williams [mailto:dan.j.williams@...el.com]
> Sent: Monday, June 18, 2018 4:47 PM
> To: Elliott, Robert (Persistent Memory) <elliott@....com>
> Cc: Kani, Toshi <toshi.kani@....com>; linux-kernel@...r.kernel.org; linux-
> nvdimm@...ts.01.org; Moore, Robert <robert.moore@...el.com>; Li, Juston
> <juston.li@...el.com>; rjw@...ysocki.net; linux-acpi@...r.kernel.org
> Subject: Re: [PATCH v3 1/2] acpi/nfit: Update nfit driver to comply with
> ACPI 6.1


> Let's take something simple like Vendor ID. What is the Vendor ID for
> these DIMMs and what does Linux print in sysfs?

Here are some examples (kernel 4.17):

$ cd /sys/bus/nd/devices/nmem0/nfit
$ grep -s . *
device:0x314e
dsm_mask:0x3c76
family:1
flags:smart_notify
format:0x0101
formats:1
handle:0x1
id:802c-0f-1612-122f8255	[SPD bytes 320-328, in that order left-to-right]
phys_id:0x16
rev_id:0x3100
serial:0x122f8255
subsystem_device:0x3141
subsystem_rev_id:0x0100
subsystem_vendor:0x8034	[Cypress Semiconductor]
vendor:0x802c		[Micron]

$ cd /sys/bus/nd/devices/nmem1/nfit
$ grep -s . *
device:0x314e
dsm_mask:0x3c76
family:1
flags:smart_notify
format:0x0101
formats:1
handle:0x2
id:802c-0f-1612-122f7f5e
phys_id:0x15
rev_id:0x3100
serial:0x122f7f5e
subsystem_device:0x3141
subsystem_rev_id:0x0100
subsystem_vendor:0x8034
vendor:0x802c

Some corresponding information for those NVDIMM-Ns as reported by dmidecode:

Handle 0x00A8, DMI type 237, 9 bytes
OEM-specific Type
        Header and Data:
                ED 09 A8 00 16 00 01 02 03
        Strings:
                Micron		[Module manufacturer]
                18ASF1G72XF12G1Y11AA	[Module part number]
                122F8255	[Module serial number]

Handle 0x00A7, DMI type 237, 9 bytes
OEM-specific Type
        Header and Data:
                ED 09 A7 00 15 00 01 02 03
        Strings:
                Micron
                18ASF1G72XF12G1Y11AA
                122F7F5E