* [PATCH 0/6] enable sysfs for lightnvm
@ 2016-06-29 14:51 Matias Bjørling
2016-06-29 14:51 ` [PATCH 1/6] nvme: refactor namespaces to support non-gendisk devices Matias Bjørling
` (5 more replies)
0 siblings, 6 replies; 10+ messages in thread
From: Matias Bjørling @ 2016-06-29 14:51 UTC (permalink / raw)
To: linux-block, linux-kernel, axboe, keith.busch, linux-nvme,
dm-devel
Cc: Matias Bjørling
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^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH 1/6] nvme: refactor namespaces to support non-gendisk devices
2016-06-29 14:51 [PATCH 0/6] enable sysfs for lightnvm Matias Bjørling
@ 2016-06-29 14:51 ` Matias Bjørling
2016-06-29 14:51 ` [PATCH 2/6] null_blk: refactor " Matias Bjørling
` (4 subsequent siblings)
5 siblings, 0 replies; 10+ messages in thread
From: Matias Bjørling @ 2016-06-29 14:51 UTC (permalink / raw)
To: linux-block, linux-kernel, axboe, keith.busch, linux-nvme,
dm-devel
Cc: Matias Bjørling
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^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH 2/6] null_blk: refactor to support non-gendisk devices
2016-06-29 14:51 [PATCH 0/6] enable sysfs for lightnvm Matias Bjørling
2016-06-29 14:51 ` [PATCH 1/6] nvme: refactor namespaces to support non-gendisk devices Matias Bjørling
@ 2016-06-29 14:51 ` Matias Bjørling
2016-06-29 14:51 ` [PATCH 3/6] blk-mq: register device instead of disk Matias Bjørling
` (3 subsequent siblings)
5 siblings, 0 replies; 10+ messages in thread
From: Matias Bjørling @ 2016-06-29 14:51 UTC (permalink / raw)
To: linux-block, linux-kernel, axboe, keith.busch, linux-nvme,
dm-devel
Cc: Matias Bjørling
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^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH 3/6] blk-mq: register device instead of disk
2016-06-29 14:51 [PATCH 0/6] enable sysfs for lightnvm Matias Bjørling
2016-06-29 14:51 ` [PATCH 1/6] nvme: refactor namespaces to support non-gendisk devices Matias Bjørling
2016-06-29 14:51 ` [PATCH 2/6] null_blk: refactor " Matias Bjørling
@ 2016-06-29 14:51 ` Matias Bjørling
2016-06-29 14:51 ` [PATCH 4/6] lightnvm: let drivers control the lifetime of nvm_dev Matias Bjørling
` (2 subsequent siblings)
5 siblings, 0 replies; 10+ messages in thread
From: Matias Bjørling @ 2016-06-29 14:51 UTC (permalink / raw)
To: linux-block, linux-kernel, axboe, keith.busch, linux-nvme,
dm-devel
Cc: Matias Bjørling
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^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH 4/6] lightnvm: let drivers control the lifetime of nvm_dev
2016-06-29 14:51 [PATCH 0/6] enable sysfs for lightnvm Matias Bjørling
` (2 preceding siblings ...)
2016-06-29 14:51 ` [PATCH 3/6] blk-mq: register device instead of disk Matias Bjørling
@ 2016-06-29 14:51 ` Matias Bjørling
2016-06-29 14:51 ` [PATCH 5/6] lightnvm: expose device geometry through sysfs Matias Bjørling
2016-06-29 14:51 ` [PATCH 6/6] lightnvm: expose gennvm target type " Matias Bjørling
5 siblings, 0 replies; 10+ messages in thread
From: Matias Bjørling @ 2016-06-29 14:51 UTC (permalink / raw)
To: linux-block, linux-kernel, axboe, keith.busch, linux-nvme,
dm-devel
Cc: Matias Bjørling
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^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH 5/6] lightnvm: expose device geometry through sysfs
2016-06-29 14:51 [PATCH 0/6] enable sysfs for lightnvm Matias Bjørling
` (3 preceding siblings ...)
2016-06-29 14:51 ` [PATCH 4/6] lightnvm: let drivers control the lifetime of nvm_dev Matias Bjørling
@ 2016-06-29 14:51 ` Matias Bjørling
2016-06-30 20:01 ` J Freyensee
2016-06-29 14:51 ` [PATCH 6/6] lightnvm: expose gennvm target type " Matias Bjørling
5 siblings, 1 reply; 10+ messages in thread
From: Matias Bjørling @ 2016-06-29 14:51 UTC (permalink / raw)
To: linux-block, linux-kernel, axboe, keith.busch, linux-nvme,
dm-devel
Cc: Simon A. F. Lund, Matias Bjørling
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^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH 5/6] lightnvm: expose device geometry through sysfs
2016-06-29 14:51 ` [PATCH 5/6] lightnvm: expose device geometry through sysfs Matias Bjørling
@ 2016-06-30 20:01 ` J Freyensee
2016-07-01 7:20 ` Matias Bjørling
0 siblings, 1 reply; 10+ messages in thread
From: J Freyensee @ 2016-06-30 20:01 UTC (permalink / raw)
To: Matias Bjørling, linux-block, linux-kernel, axboe,
keith.busch, linux-nvme, dm-devel
Cc: Simon A. F. Lund
On Wed, 2016-06-29 at 16:51 +0200, Matias Bjørling wrote:
> From: "Simon A. F. Lund" <slund@cnexlabs.com>
>
> For a host to access an Open-Channel SSD, it has to know its
> geometry,
> so that it writes and reads at the appropriate device bounds.
>
> Currently, the geometry information is kept within the kernel, and
> not
> exported to user-space for consumption. This patch exposes the
> configuration through sysfs and enables user-space libraries, such as
> liblightnvm, to use the sysfs implementation to get the geometry of
> an
> Open-Channel SSD.
>
> The sysfs entries are stored within the device hierarchy, and can be
> found using the "lightnvm" device type.
>
> An example configuration looks like this:
>
> /sys/class/nvme/
> └── nvme0n1
> ├── capabilities: 3
> ├── device_mode: 1
> ├── channel_parallelism: 0
> ├── erase_max: 1000000
> ├── erase_typ: 1000000
> ├── flash_media_type: 0
> ├── media_capabilities: 0x00000001
> ├── media_type: 0
> ├── multiplane: 0x00010101
> ├── num_blocks: 1022
> ├── num_channels: 1
> ├── num_luns: 4
> ├── num_pages: 64
> ├── num_planes: 1
> ├── page_size: 4096
> ├── prog_max: 100000
> ├── prog_typ: 100000
> ├── read_max: 10000
> ├── read_typ: 10000
> ├── sector_oob_size: 0
> ├── sector_size: 4096
> ├── media_manager: gennvm
> ├── ppa_format: 0x380830082808001010102008
> ├── vendor_opcode: 0
> └── version: 1
>
That is an awful lot of new things to add under nvme0n1-type sysfs
entries when there is already a decent amount of stuff under it.
Any chance these new things could be stuck under a separate sysfs
directory under each nvmeXnY device? If these things are mainly
beneficial to LightNVM, it will be easier for a LightNVM newbie to
find, recognize, and consider all the important things in an Open
Channel SSD solution if it's under a separate directory. And for
current SSD solutions that don't seem to need these things exposed in
sysfs for operation, it will make what is directly under nvmeXnY
directories less cluttered.
Thanks,
Jay
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 5/6] lightnvm: expose device geometry through sysfs
2016-06-30 20:01 ` J Freyensee
@ 2016-07-01 7:20 ` Matias Bjørling
0 siblings, 0 replies; 10+ messages in thread
From: Matias Bjørling @ 2016-07-01 7:20 UTC (permalink / raw)
To: J Freyensee, linux-block, linux-kernel, axboe, keith.busch,
linux-nvme, dm-devel
Cc: Simon A. F. Lund
On 06/30/2016 10:01 PM, J Freyensee wrote:
> On Wed, 2016-06-29 at 16:51 +0200, Matias Bjørling wrote:
>> From: "Simon A. F. Lund" <slund@cnexlabs.com>
>>
>> For a host to access an Open-Channel SSD, it has to know its
>> geometry,
>> so that it writes and reads at the appropriate device bounds.
>>
>> Currently, the geometry information is kept within the kernel, and
>> not
>> exported to user-space for consumption. This patch exposes the
>> configuration through sysfs and enables user-space libraries, such as
>> liblightnvm, to use the sysfs implementation to get the geometry of
>> an
>> Open-Channel SSD.
>>
>> The sysfs entries are stored within the device hierarchy, and can be
>> found using the "lightnvm" device type.
>>
>> An example configuration looks like this:
>>
>> /sys/class/nvme/
>> └── nvme0n1
>> ├── capabilities: 3
>> ├── device_mode: 1
>> ├── channel_parallelism: 0
>> ├── erase_max: 1000000
>> ├── erase_typ: 1000000
>> ├── flash_media_type: 0
>> ├── media_capabilities: 0x00000001
>> ├── media_type: 0
>> ├── multiplane: 0x00010101
>> ├── num_blocks: 1022
>> ├── num_channels: 1
>> ├── num_luns: 4
>> ├── num_pages: 64
>> ├── num_planes: 1
>> ├── page_size: 4096
>> ├── prog_max: 100000
>> ├── prog_typ: 100000
>> ├── read_max: 10000
>> ├── read_typ: 10000
>> ├── sector_oob_size: 0
>> ├── sector_size: 4096
>> ├── media_manager: gennvm
>> ├── ppa_format: 0x380830082808001010102008
>> ├── vendor_opcode: 0
>> └── version: 1
>>
>
> That is an awful lot of new things to add under nvme0n1-type sysfs
> entries when there is already a decent amount of stuff under it.
>
You are right. These are rightfully placed under /lightnvm in the sysfs
path. The description is wrong, will update it. Thanks Jay.
> Any chance these new things could be stuck under a separate sysfs
> directory under each nvmeXnY device? If these things are mainly
> beneficial to LightNVM, it will be easier for a LightNVM newbie to
> find, recognize, and consider all the important things in an Open
> Channel SSD solution if it's under a separate directory. And for
> current SSD solutions that don't seem to need these things exposed in
> sysfs for operation, it will make what is directly under nvmeXnY
> directories less cluttered.
>
> Thanks,
> Jay
>
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH 6/6] lightnvm: expose gennvm target type through sysfs
2016-06-29 14:51 [PATCH 0/6] enable sysfs for lightnvm Matias Bjørling
` (4 preceding siblings ...)
2016-06-29 14:51 ` [PATCH 5/6] lightnvm: expose device geometry through sysfs Matias Bjørling
@ 2016-06-29 14:51 ` Matias Bjørling
5 siblings, 0 replies; 10+ messages in thread
From: Matias Bjørling @ 2016-06-29 14:51 UTC (permalink / raw)
To: linux-block, linux-kernel, axboe, keith.busch, linux-nvme,
dm-devel
Cc: Simon A. F. Lund, Matias Bjørling
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^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH 0/6] sysfs support for LightNVM
@ 2016-06-10 12:20 Matias Bjørling
2016-06-10 12:20 ` [PATCH 2/6] null_blk: refactor to support non-gendisk devices Matias Bjørling
0 siblings, 1 reply; 10+ messages in thread
From: Matias Bjørling @ 2016-06-10 12:20 UTC (permalink / raw)
To: linux-block, linux-kernel, axboe, keith.busch, linux-nvme
Cc: Matias Bjørling
Hi Jens and Keith,
If the patches look good to you, would you pick them up through your
tree?
The common way to expose a storage device is to export it through the
gendisk structure, which takes care of handling the visibility lifetime
of the device to user-space and carries device driver and block layer
specific sysfs entries.
For LightNVM, no gendisk is exposed, which hides these entries.
This patchset enables LightNVM to expose a subset of the gendisk entries
by implementing a new non-gendisk device that only exposes the sysfs
entries that are relevant to the device driver and LightNVM. For example
/mq and the NVMe sysfs entries.
The new non-gendisk exposes itself in place of the original gendisk.
Thus, a gendisk device exposed through /sys/class/nvme/nvme0n1, will
still be exposed through the same directory, although only with the /mq,
lightnvm, and nvme specific entries.
The LightNVM storage device can be found through sysfs by searching
for devices that has the "lightnvm" dev type.
v2:
- Updated "expose gennvm target type" to expose its own kobject, which
pblk and others can hook into.
- Fixed missing disk_name in null_blk patch on lightnvm device
Thanks,
Matias
Matias Bjørling (4):
nvme: refactor namespaces to support non-gendisk devices
null_blk: refactor to support non-gendisk devices
blk-mq: register device instead of disk
lightnvm: let drivers control the lifetime of nvm_dev
Simon A. F. Lund (2):
lightnvm: expose device geometry through sysfs
lightnvm: expose gennvm target type through sysfs
block/blk-mq-sysfs.c | 13 ++-
block/blk-sysfs.c | 4 +-
drivers/block/null_blk.c | 128 +++++++++++++++++-----------
drivers/lightnvm/Makefile | 2 +-
drivers/lightnvm/core.c | 52 +++++-------
drivers/lightnvm/gennvm.c | 112 +++++++++++++++++++++----
drivers/lightnvm/lightnvm.h | 35 ++++++++
drivers/lightnvm/sysfs.c | 195 +++++++++++++++++++++++++++++++++++++++++++
drivers/md/dm.c | 2 +-
drivers/nvme/host/core.c | 165 ++++++++++++++++++++----------------
drivers/nvme/host/lightnvm.c | 29 ++++++-
drivers/nvme/host/nvme.h | 26 ++++--
include/linux/blk-mq.h | 4 +-
include/linux/lightnvm.h | 28 +++++--
14 files changed, 597 insertions(+), 198 deletions(-)
create mode 100644 drivers/lightnvm/lightnvm.h
create mode 100644 drivers/lightnvm/sysfs.c
--
2.1.4
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH 2/6] null_blk: refactor to support non-gendisk devices
2016-06-10 12:20 [PATCH 0/6] sysfs support for LightNVM Matias Bjørling
@ 2016-06-10 12:20 ` Matias Bjørling
0 siblings, 0 replies; 10+ messages in thread
From: Matias Bjørling @ 2016-06-10 12:20 UTC (permalink / raw)
To: linux-block, linux-kernel, axboe, keith.busch, linux-nvme
Cc: Matias Bjørling
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^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2016-07-01 7:21 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-06-29 14:51 [PATCH 0/6] enable sysfs for lightnvm Matias Bjørling
2016-06-29 14:51 ` [PATCH 1/6] nvme: refactor namespaces to support non-gendisk devices Matias Bjørling
2016-06-29 14:51 ` [PATCH 2/6] null_blk: refactor " Matias Bjørling
2016-06-29 14:51 ` [PATCH 3/6] blk-mq: register device instead of disk Matias Bjørling
2016-06-29 14:51 ` [PATCH 4/6] lightnvm: let drivers control the lifetime of nvm_dev Matias Bjørling
2016-06-29 14:51 ` [PATCH 5/6] lightnvm: expose device geometry through sysfs Matias Bjørling
2016-06-30 20:01 ` J Freyensee
2016-07-01 7:20 ` Matias Bjørling
2016-06-29 14:51 ` [PATCH 6/6] lightnvm: expose gennvm target type " Matias Bjørling
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2016-06-10 12:20 [PATCH 0/6] sysfs support for LightNVM Matias Bjørling
2016-06-10 12:20 ` [PATCH 2/6] null_blk: refactor to support non-gendisk devices Matias Bjørling
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