Unable to find /dev/nvme0

Unable to find /dev/nvme0

[Haomai Wang]

Hi,

I use a linux kernel version 3.12 based on CentOS 6.5:
# uname -a
Linux server-72 3.12.21-1.el6.x86_64 #1 SMP Thu Jun 5 22:15:05 EDT
2014 x86_64 x86_64 x86_64 GNU/Linux

I insert kernel module nvme:
# modprobe nvme
# lsmod | grep nvme
nvme                   54575  0
# modinfo nvme
filename:       /lib/modules/3.12.21-1.el6.x86_64/kernel/drivers/block/nvme.ko
version:        0.8
license:        GPL
author:         Matthew Wilcox <willy at linux.intel.com>
srcversion:     971AB1E47B949401886CC3F
alias:          pci:v*d*sv*sd*bc01sc08i02*
depends:
intree:         Y
vermagic:       3.12.21-1.el6.x86_64 SMP mod_unload modversions
parm:           nvme_major:int
parm:           use_threaded_interrupts:int

I follow the instructment from
(file:///Users/wanghaomai/Downloads/SF13_SSDL001_100.pdf) and can't
fiind:
# ls /dev/nvme*
ls: cannot access /dev/nvme*: No such file or directory

I used intel nvme p3500 for testing.

I'm very appreciated if any feedback

-- 
Best Regards,

Wheat

Unable to find /dev/nvme0

[Angelo Brito]

Hi Wang,

First things first. Have you tried a lspci commands and checked if
your device was reconized?
Also, you coould use dmesg to look for errors regarding the nvme
module. Does anything showed up?

Regards
Angelo Silva Brito.
Digital Systems Engineer - UFPE
http://about.me/angelobrito
_________________________________________________


On Fri, Sep 12, 2014@1:23 AM, Haomai Wang <haomaiwang@gmail.com> wrote:
> Hi,
>
> I use a linux kernel version 3.12 based on CentOS 6.5:
> # uname -a
> Linux server-72 3.12.21-1.el6.x86_64 #1 SMP Thu Jun 5 22:15:05 EDT
> 2014 x86_64 x86_64 x86_64 GNU/Linux
>
> I insert kernel module nvme:
> # modprobe nvme
> # lsmod | grep nvme
> nvme                   54575  0
> # modinfo nvme
> filename:       /lib/modules/3.12.21-1.el6.x86_64/kernel/drivers/block/nvme.ko
> version:        0.8
> license:        GPL
> author:         Matthew Wilcox <willy at linux.intel.com>
> srcversion:     971AB1E47B949401886CC3F
> alias:          pci:v*d*sv*sd*bc01sc08i02*
> depends:
> intree:         Y
> vermagic:       3.12.21-1.el6.x86_64 SMP mod_unload modversions
> parm:           nvme_major:int
> parm:           use_threaded_interrupts:int
>
> I follow the instructment from
> (file:///Users/wanghaomai/Downloads/SF13_SSDL001_100.pdf) and can't
> fiind:
> # ls /dev/nvme*
> ls: cannot access /dev/nvme*: No such file or directory
>
> I used intel nvme p3500 for testing.
>
> I'm very appreciated if any feedback
>
> --
> Best Regards,
>
> Wheat
>
> _______________________________________________
> Linux-nvme mailing list
> Linux-nvme at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-nvme

Unable to find /dev/nvme0

[Haomai Wang]

Thanks!

I have found the reason because of broken pcie slot :-(;

On Fri, Sep 12, 2014@3:12 PM, Angelo Brito <asb@cin.ufpe.br> wrote:
> Hi Wang,
>
> First things first. Have you tried a lspci commands and checked if
> your device was reconized?
> Also, you coould use dmesg to look for errors regarding the nvme
> module. Does anything showed up?
>
> Regards
> Angelo Silva Brito.
> Digital Systems Engineer - UFPE
> http://about.me/angelobrito
> _________________________________________________
>
>
> On Fri, Sep 12, 2014@1:23 AM, Haomai Wang <haomaiwang@gmail.com> wrote:
>> Hi,
>>
>> I use a linux kernel version 3.12 based on CentOS 6.5:
>> # uname -a
>> Linux server-72 3.12.21-1.el6.x86_64 #1 SMP Thu Jun 5 22:15:05 EDT
>> 2014 x86_64 x86_64 x86_64 GNU/Linux
>>
>> I insert kernel module nvme:
>> # modprobe nvme
>> # lsmod | grep nvme
>> nvme                   54575  0
>> # modinfo nvme
>> filename:       /lib/modules/3.12.21-1.el6.x86_64/kernel/drivers/block/nvme.ko
>> version:        0.8
>> license:        GPL
>> author:         Matthew Wilcox <willy at linux.intel.com>
>> srcversion:     971AB1E47B949401886CC3F
>> alias:          pci:v*d*sv*sd*bc01sc08i02*
>> depends:
>> intree:         Y
>> vermagic:       3.12.21-1.el6.x86_64 SMP mod_unload modversions
>> parm:           nvme_major:int
>> parm:           use_threaded_interrupts:int
>>
>> I follow the instructment from
>> (file:///Users/wanghaomai/Downloads/SF13_SSDL001_100.pdf) and can't
>> fiind:
>> # ls /dev/nvme*
>> ls: cannot access /dev/nvme*: No such file or directory
>>
>> I used intel nvme p3500 for testing.
>>
>> I'm very appreciated if any feedback
>>
>> --
>> Best Regards,
>>
>> Wheat
>>
>> _______________________________________________
>> Linux-nvme mailing list
>> Linux-nvme at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-nvme



-- 
Best Regards,

Wheat

Unable to find /dev/nvme0

[Angelo Brito]

Hi Wang,

I don't know any NVMe API. If there is an API for this driver the guys
from the nvme list can comment about it.
I have been working with NVMe driver, to do so I included the nvme.h
from kernel headers from usr/src/kernel/linux/include folders and
calling drivers functions directly.
Also, all UNIX programs like cp, mkfs, rm, mkdir, ls and all others,
are compatible with the driver.

Regards,
Angelo Silva Brito.
Graduate in Engenharia da Computa??o - UFPE
http://about.me/angelobrito
_________________________________________________


On Fri, Sep 12, 2014@4:39 AM, Haomai Wang <haomaiwang@gmail.com> wrote:
> Another question: where can I found the NVME API example program?
> nvme-user repo seemed too poor.
>
> On Fri, Sep 12, 2014@3:31 PM, Haomai Wang <haomaiwang@gmail.com> wrote:
>> Thanks!
>>
>> I have found the reason because of broken pcie slot :-(;
>>
>> On Fri, Sep 12, 2014@3:12 PM, Angelo Brito <asb@cin.ufpe.br> wrote:
>>> Hi Wang,
>>>
>>> First things first. Have you tried a lspci commands and checked if
>>> your device was reconized?
>>> Also, you coould use dmesg to look for errors regarding the nvme
>>> module. Does anything showed up?
>>>
>>> Regards
>>> Angelo Silva Brito.
>>> Digital Systems Engineer - UFPE
>>> http://about.me/angelobrito
>>> _________________________________________________
>>>
>>>
>>> On Fri, Sep 12, 2014@1:23 AM, Haomai Wang <haomaiwang@gmail.com> wrote:
>>>> Hi,
>>>>
>>>> I use a linux kernel version 3.12 based on CentOS 6.5:
>>>> # uname -a
>>>> Linux server-72 3.12.21-1.el6.x86_64 #1 SMP Thu Jun 5 22:15:05 EDT
>>>> 2014 x86_64 x86_64 x86_64 GNU/Linux
>>>>
>>>> I insert kernel module nvme:
>>>> # modprobe nvme
>>>> # lsmod | grep nvme
>>>> nvme                   54575  0
>>>> # modinfo nvme
>>>> filename:       /lib/modules/3.12.21-1.el6.x86_64/kernel/drivers/block/nvme.ko
>>>> version:        0.8
>>>> license:        GPL
>>>> author:         Matthew Wilcox <willy at linux.intel.com>
>>>> srcversion:     971AB1E47B949401886CC3F
>>>> alias:          pci:v*d*sv*sd*bc01sc08i02*
>>>> depends:
>>>> intree:         Y
>>>> vermagic:       3.12.21-1.el6.x86_64 SMP mod_unload modversions
>>>> parm:           nvme_major:int
>>>> parm:           use_threaded_interrupts:int
>>>>
>>>> I follow the instructment from
>>>> (file:///Users/wanghaomai/Downloads/SF13_SSDL001_100.pdf) and can't
>>>> fiind:
>>>> # ls /dev/nvme*
>>>> ls: cannot access /dev/nvme*: No such file or directory
>>>>
>>>> I used intel nvme p3500 for testing.
>>>>
>>>> I'm very appreciated if any feedback
>>>>
>>>> --
>>>> Best Regards,
>>>>
>>>> Wheat
>>>>
>>>> _______________________________________________
>>>> Linux-nvme mailing list
>>>> Linux-nvme at lists.infradead.org
>>>> http://lists.infradead.org/mailman/listinfo/linux-nvme
>>
>>
>>
>> --
>> Best Regards,
>>
>> Wheat
>
>
>
> --
> Best Regards,
>
> Wheat

Unable to find /dev/nvme0

[Keith Busch]

On Fri, 12 Sep 2014, Angelo Brito wrote:
> I don't know any NVMe API. If there is an API for this driver the guys
> from the nvme list can comment about it.
> I have been working with NVMe driver, to do so I included the nvme.h
> from kernel headers from usr/src/kernel/linux/include folders and
> calling drivers functions directly.
>
> On Fri, Sep 12, 2014@4:39 AM, Haomai Wang <haomaiwang@gmail.com> wrote:
>> Another question: where can I found the NVME API example program?
>> nvme-user repo seemed too poor.

I'm having a hard time parsing this conversation into something that
makes sense. Are you asking for an example user space program that makes
use of the linux nvme driver's uapi? I don't think you'll find a simpler
example than those in the nvme user repo. Or perhaps you can suggest
what you think it's lacking?

Unable to find /dev/nvme0

[Angelo Brito]

Hi Keith.

I am already doing user space programs that makes use of the driver's uapi.
Wang asked about an API. I tried to explain that he can use the uapi
and use UNIX commands.
Sorry for the confused reply.

Regards,
Angelo Silva Brito.
Graduate in Engenharia da Computa??o - UFPE
http://about.me/angelobrito
_________________________________________________


On Fri, Sep 12, 2014@11:56 AM, Keith Busch <keith.busch@intel.com> wrote:
>
> On Fri, 12 Sep 2014, Angelo Brito wrote:
>>
>> I don't know any NVMe API. If there is an API for this driver the guys
>> from the nvme list can comment about it.
>> I have been working with NVMe driver, to do so I included the nvme.h
>> from kernel headers from usr/src/kernel/linux/include folders and
>> calling drivers functions directly.
>>
>> On Fri, Sep 12, 2014@4:39 AM, Haomai Wang <haomaiwang@gmail.com> wrote:
>>>
>>> Another question: where can I found the NVME API example program?
>>> nvme-user repo seemed too poor.
>
>
> I'm having a hard time parsing this conversation into something that
> makes sense. Are you asking for an example user space program that makes
> use of the linux nvme driver's uapi? I don't think you'll find a simpler
> example than those in the nvme user repo. Or perhaps you can suggest
> what you think it's lacking?

Unable to find /dev/nvme0

[Haomai Wang]

Thanks to all!

I misunderstood with NVMe driver. I have got it!

On Sat, Sep 13, 2014@12:53 AM, Angelo Brito <asb@cin.ufpe.br> wrote:
> Hi Keith.
>
> I am already doing user space programs that makes use of the driver's uapi.
> Wang asked about an API. I tried to explain that he can use the uapi
> and use UNIX commands.
> Sorry for the confused reply.
>
> Regards,
> Angelo Silva Brito.
> Graduate in Engenharia da Computa??o - UFPE
> http://about.me/angelobrito
> _________________________________________________
>
>
> On Fri, Sep 12, 2014@11:56 AM, Keith Busch <keith.busch@intel.com> wrote:
>>
>> On Fri, 12 Sep 2014, Angelo Brito wrote:
>>>
>>> I don't know any NVMe API. If there is an API for this driver the guys
>>> from the nvme list can comment about it.
>>> I have been working with NVMe driver, to do so I included the nvme.h
>>> from kernel headers from usr/src/kernel/linux/include folders and
>>> calling drivers functions directly.
>>>
>>> On Fri, Sep 12, 2014@4:39 AM, Haomai Wang <haomaiwang@gmail.com> wrote:
>>>>
>>>> Another question: where can I found the NVME API example program?
>>>> nvme-user repo seemed too poor.
>>
>>
>> I'm having a hard time parsing this conversation into something that
>> makes sense. Are you asking for an example user space program that makes
>> use of the linux nvme driver's uapi? I don't think you'll find a simpler
>> example than those in the nvme user repo. Or perhaps you can suggest
>> what you think it's lacking?



-- 
Best Regards,

Wheat