From: Christoph Hellwig <hch@infradead.org>
To: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Logan Gunthorpe <logang@deltatee.com>,
Dan Williams <dan.j.williams@intel.com>,
Stephen Bates <sbates@raithlin.com>,
Haggai Eran <haggaie@mellanox.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"linux-nvdimm@ml01.01.org" <linux-nvdimm@ml01.01.org>,
"christian.koenig@amd.com" <christian.koenig@amd.com>,
"Suravee.Suthikulpanit@amd.com" <suravee.suthikulpanit@amd.com>,
"John.Bridgman@amd.com" <john.bridgman@amd.com>,
"Alexander.Deucher@amd.com" <alexander.deucher@amd.com>,
"Linux-media@vger.kernel.org" <linux-media@vger.kernel.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
Max Gurtovoy <maxg@mellanox.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"serguei.sagalovitch@amd.com" <serguei.sagalovitch@amd.com>,
"Paul.Blinzer@amd.com" <paul.blinzer@amd.com>,
"Felix.Kuehling@amd.com" <felix.kuehling@amd.com>,
"ben.sander@amd.com" <ben.sander@amd.com>
Subject: Re: Enabling peer to peer device transactions for PCIe devices
Date: Mon, 5 Dec 2016 12:06:32 -0800 [thread overview]
Message-ID: <20161205200632.GA24497@infradead.org> (raw)
In-Reply-To: <20161205194614.GA21132@obsidianresearch.com>
On Mon, Dec 05, 2016 at 12:46:14PM -0700, Jason Gunthorpe wrote:
> In any event the allocator still needs to track which regions are in
> use and be able to hook 'free' from userspace. That does suggest it
> should be integrated into the nvme driver and not a bolt on driver..
Two totally different use cases:
- a card that exposes directly byte addressable storage as a PCI-e
bar. Thin of it as a nvdimm on a PCI-e card. That's the iopmem
case.
- the NVMe CMB which exposes a byte addressable indirection buffer for
I/O, but does not actually provide byte addressable persistent
storage. This is something that needs to be added to the NVMe driver
(and the block layer for the abstraction probably).
next prev parent reply other threads:[~2016-12-05 20:06 UTC|newest]
Thread overview: 126+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-21 20:36 Enabling peer to peer device transactions for PCIe devices Deucher, Alexander
2016-11-22 18:11 ` Dan Williams
[not found] ` <75a1f44f-c495-7d1e-7e1c-17e89555edba@amd.com>
2016-11-22 20:01 ` Dan Williams
2016-11-22 20:10 ` Daniel Vetter
2016-11-22 20:24 ` Dan Williams
2016-11-22 20:35 ` Serguei Sagalovitch
2016-11-22 21:03 ` Daniel Vetter
2016-11-22 21:21 ` Dan Williams
2016-11-22 22:21 ` Sagalovitch, Serguei
2016-11-23 7:49 ` Daniel Vetter
2016-11-23 8:51 ` Christian König
2016-11-23 19:27 ` Serguei Sagalovitch
2016-11-23 17:03 ` Dave Hansen
2016-11-23 17:13 ` Logan Gunthorpe
2016-11-23 17:27 ` Bart Van Assche
2016-11-23 18:40 ` Dan Williams
2016-11-23 19:12 ` Jason Gunthorpe
2016-11-23 19:24 ` Serguei Sagalovitch
2016-11-23 19:06 ` Serguei Sagalovitch
2016-11-23 19:05 ` Jason Gunthorpe
2016-11-23 19:14 ` Serguei Sagalovitch
2016-11-23 19:32 ` Jason Gunthorpe
[not found] ` <c2c88376-5ba7-37d1-4d3e-592383ebb00a@amd.com>
2016-11-23 20:33 ` Jason Gunthorpe
2016-11-23 21:11 ` Logan Gunthorpe
2016-11-23 21:55 ` Jason Gunthorpe
2016-11-23 22:42 ` Dan Williams
2016-11-23 23:25 ` Jason Gunthorpe
2016-11-24 9:45 ` Christian König
2016-11-24 16:26 ` Jason Gunthorpe
2016-11-24 17:00 ` Serguei Sagalovitch
2016-11-24 17:55 ` Logan Gunthorpe
2016-11-25 13:06 ` Christian König
2016-11-25 16:45 ` Logan Gunthorpe
2016-11-25 17:20 ` Serguei Sagalovitch
2016-11-25 20:26 ` Felix Kuehling
2016-11-25 20:48 ` Serguei Sagalovitch
2016-11-24 0:40 ` Sagalovitch, Serguei
2016-11-24 16:24 ` Jason Gunthorpe
2016-11-24 1:25 ` Logan Gunthorpe
2016-11-24 16:42 ` Jason Gunthorpe
2016-11-24 18:11 ` Logan Gunthorpe
2016-11-25 7:58 ` Christoph Hellwig
2016-11-25 19:41 ` Jason Gunthorpe
2016-11-25 17:59 ` Serguei Sagalovitch
2016-11-25 13:22 ` Christian König
2016-11-25 17:16 ` Serguei Sagalovitch
2016-11-25 19:34 ` Jason Gunthorpe
2016-11-25 19:49 ` Serguei Sagalovitch
2016-11-25 20:19 ` Jason Gunthorpe
2016-11-25 23:41 ` Alex Deucher
2016-11-25 19:32 ` Jason Gunthorpe
2016-11-25 20:40 ` Christian König
2016-11-25 20:51 ` Felix Kuehling
2016-11-25 21:18 ` Jason Gunthorpe
2016-11-27 8:16 ` Haggai Eran
2016-11-27 14:02 ` Haggai Eran
2016-11-27 14:07 ` Christian König
2016-11-28 5:31 ` zhoucm1
2016-11-28 14:48 ` Serguei Sagalovitch
2016-11-28 18:36 ` Haggai Eran
2016-11-28 16:57 ` Jason Gunthorpe
2016-11-28 18:19 ` Haggai Eran
2016-11-28 19:02 ` Jason Gunthorpe
2016-11-30 10:45 ` Haggai Eran
2016-11-30 16:23 ` Jason Gunthorpe
2016-11-30 17:28 ` Serguei Sagalovitch
2016-12-04 7:33 ` Haggai Eran
2016-11-30 18:01 ` Logan Gunthorpe
2016-12-04 7:42 ` Haggai Eran
2016-12-04 13:06 ` Stephen Bates
2016-12-04 13:23 ` Stephen Bates
2016-12-05 17:18 ` Jason Gunthorpe
2016-12-05 17:40 ` Dan Williams
2016-12-05 18:02 ` Jason Gunthorpe
2016-12-05 18:08 ` Dan Williams
2016-12-05 18:39 ` Logan Gunthorpe
2016-12-05 18:48 ` Dan Williams
2016-12-05 19:14 ` Jason Gunthorpe
2016-12-05 19:27 ` Logan Gunthorpe
2016-12-05 19:46 ` Jason Gunthorpe
2016-12-05 19:59 ` Logan Gunthorpe
2016-12-05 20:06 ` Christoph Hellwig [this message]
2016-12-06 8:06 ` Stephen Bates
2016-12-06 16:38 ` Jason Gunthorpe
2016-12-06 16:51 ` Logan Gunthorpe
2016-12-06 17:28 ` Jason Gunthorpe
2016-12-06 21:47 ` Logan Gunthorpe
2016-12-06 22:02 ` Dan Williams
2016-12-06 17:12 ` Christoph Hellwig
2016-12-04 7:53 ` Haggai Eran
2016-11-30 17:10 ` Deucher, Alexander
2016-11-28 18:20 ` Logan Gunthorpe
2016-11-28 19:35 ` Serguei Sagalovitch
2016-11-28 21:36 ` Logan Gunthorpe
2016-11-28 21:55 ` Serguei Sagalovitch
2016-11-28 22:24 ` Jason Gunthorpe
2017-01-05 18:39 ` Jerome Glisse
2017-01-05 19:01 ` Jason Gunthorpe
2017-01-05 19:54 ` Jerome Glisse
2017-01-05 20:07 ` Jason Gunthorpe
2017-01-05 20:19 ` Jerome Glisse
2017-01-05 22:42 ` Jason Gunthorpe
2017-01-05 23:23 ` Jerome Glisse
2017-01-06 0:30 ` Jason Gunthorpe
2017-01-06 0:41 ` Serguei Sagalovitch
2017-01-06 1:58 ` Jerome Glisse
2017-01-06 16:56 ` Serguei Sagalovitch
2017-01-06 17:37 ` Jerome Glisse
2017-01-06 18:26 ` Jason Gunthorpe
2017-01-06 19:12 ` Deucher, Alexander
2017-01-06 22:10 ` Logan Gunthorpe
2017-01-12 4:54 ` Stephen Bates
2017-01-12 15:11 ` Jerome Glisse
2017-01-12 17:17 ` Jason Gunthorpe
2017-01-13 13:04 ` Christian König
2017-01-12 22:35 ` Logan Gunthorpe
2017-01-06 15:08 ` Henrique Almeida
2017-10-20 12:36 ` Ludwig Petrosyan
2017-10-20 15:48 ` Logan Gunthorpe
2017-10-22 6:13 ` Petrosyan, Ludwig
2017-10-22 17:19 ` Logan Gunthorpe
2017-10-23 16:08 ` David Laight
2017-10-23 22:04 ` Logan Gunthorpe
2017-10-24 5:58 ` Petrosyan, Ludwig
2017-10-24 14:58 ` David Laight
2017-10-26 13:28 ` Petrosyan, Ludwig
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