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From: Dan Williams <dan.j.williams@intel.com>
To: Andrew Donnellan <ajd@linux.ibm.com>
Cc: "Oscar Salvador" <osalvador@suse.com>,
	"Michal Hocko" <mhocko@suse.com>,
	"David Hildenbrand" <david@redhat.com>,
	"Alexey Kardashevskiy" <aik@ozlabs.ru>,
	"Mahesh Salgaonkar" <mahesh@linux.vnet.ibm.com>,
	"Wei Yang" <richard.weiyang@gmail.com>,
	"Masahiro Yamada" <yamada.masahiro@socionext.com>,
	"Paul Mackerras" <paulus@samba.org>,
	"Ira Weiny" <ira.weiny@intel.com>,
	"Dave Jiang" <dave.jiang@intel.com>,
	linux-nvdimm <linux-nvdimm@lists.01.org>,
	"Vishal Verma" <vishal.l.verma@intel.com>,
	"Krzysztof Kozlowski" <krzk@kernel.org>,
	alastair@d-silva.org,
	"Pavel Tatashin" <pasha.tatashin@soleen.com>,
	"Arnd Bergmann" <arnd@arndb.de>, "Greg Kurz" <groug@kaod.org>,
	"Nicholas Piggin" <npiggin@gmail.com>, "Qian Cai" <cai@lca.pw>,
	"Cédric Le Goater" <clg@kaod.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Hari Bathini" <hbathini@linux.ibm.com>,
	"David Gibson" <david@gibson.dropbear.id.au>,
	"Alastair D\'Silva" <alastair@au1.ibm.com>,
	"Linux MM" <linux-mm@kvack.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Frederic Barrat" <fbarrat@linux.ibm.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH 08/10] nvdimm: Add driver for OpenCAPI Storage Class Memory
Date: Mon, 18 Nov 2019 16:04:07 -0800
Message-ID: <CAPcyv4hDxeJo-i9FG=JBhaK3awjm3cN_MNvdO_7Z=9bJT9wsGw@mail.gmail.com> (raw)
In-Reply-To: <02374c9a-39fb-5693-3d9c-aa7e7674a6c1@linux.ibm.com>

On Mon, Nov 18, 2019 at 3:48 PM Andrew Donnellan <ajd@linux.ibm.com> wrote:
>
> On 15/11/19 3:35 am, Dan Williams wrote:
> >> Have you discussed with the directory owner if it's ok to split the
> >> driver over several files?
> >
> > My thought is to establish drivers/opencapi/ and move this and the
> > existing drivers/misc/ocxl/ bits there.
>
> Is there any other justification for this we can think of apart from not
> wanting to put this driver in the nvdimm directory? OpenCAPI drivers
> aren't really a category of driver unto themselves.

The concern is less about adding to drivers/nvdimm/ and more about the
proper location to house opencapi specific transport and enumeration
details. The organization I'm looking for is to group platform
transport and enumeration code together similar to how drivers/pci/
exists independent of all pci drivers that use that common core. For
libnvdimm the enumeration is platform specific and calls into the
nvdimm core. This is why the x86 platform persistent memory bus driver
lives under drivers/acpi/nfit/ instead of drivers/nvdimm/. The nfit
driver is an ACPI extension that translates ACPI details into
libnvdimm core objects.

The usage of "ocxl" in the source leads me to think part of this
driver belongs in a directory that has other opencapi specific
considerations.

  reply index

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-25  4:46 [PATCH 00/10] Add support for OpenCAPI SCM devices Alastair D'Silva
2019-10-25  4:46 ` [PATCH 01/10] memory_hotplug: Add a bounds check to __add_pages Alastair D'Silva
2019-10-25  4:46 ` [PATCH 02/10] nvdimm: remove prototypes for nonexistent functions Alastair D'Silva
2019-10-27 23:41   ` Andrew Donnellan
2019-11-07 17:56   ` Frederic Barrat
2019-11-15  4:30   ` Dan Williams
2019-10-25  4:46 ` [PATCH 03/10] powerpc: Add OPAL calls for LPC memory alloc/release Alastair D'Silva
2019-11-07 17:57   ` Frederic Barrat
2019-10-25  4:46 ` [PATCH 04/10] powerpc: Map & release OpenCAPI LPC memory Alastair D'Silva
2019-10-27 21:24   ` kbuild test robot
2019-10-27 21:59   ` kbuild test robot
2019-10-28  2:34   ` kbuild test robot
2019-10-29  1:49   ` Andrew Donnellan
2019-10-29  2:44     ` Alastair D'Silva
2019-10-29  2:47       ` Andrew Donnellan
2019-11-07 17:59   ` Frederic Barrat
2019-11-11  9:34   ` Aneesh Kumar K.V
2019-10-25  4:47 ` [PATCH 05/10] ocxl: Tally up the LPC memory on a link & allow it to be mapped Alastair D'Silva
2019-11-07 18:02   ` Frederic Barrat
2019-10-25  4:47 ` [PATCH 06/10] ocxl: Add functions to map/unmap LPC memory Alastair D'Silva
2019-11-07 18:05   ` Frederic Barrat
2019-10-25  4:47 ` [PATCH 07/10] ocxl: Save the device serial number in ocxl_fn Alastair D'Silva
2019-11-06  3:10   ` Andrew Donnellan
2019-11-07 18:18   ` Frederic Barrat
2019-10-25  4:47 ` [PATCH 08/10] nvdimm: Add driver for OpenCAPI Storage Class Memory Alastair D'Silva
2019-10-27 22:19   ` kbuild test robot
2019-10-27 22:53   ` kbuild test robot
2019-10-28  1:12   ` [RFC PATCH] nvdimm: scm_get() can be static kbuild test robot
2019-11-11 11:14   ` [PATCH 08/10] nvdimm: Add driver for OpenCAPI Storage Class Memory Aneesh Kumar K.V
2019-11-12  5:37     ` Dan Williams
2019-11-12  5:41       ` Dan Williams
2019-11-14 13:41   ` Frederic Barrat
2019-11-14 16:35     ` Dan Williams
2019-11-18 23:47       ` Andrew Donnellan
2019-11-19  0:04         ` Dan Williams [this message]
2019-11-19  2:48         ` Alastair D'Silva
2019-11-19  3:26           ` Andrew Donnellan
2019-11-19  4:41             ` Dan Williams
2019-11-18 23:01     ` Alastair D'Silva
2019-10-25  4:47 ` [PATCH 09/10] powerpc: Enable OpenCAPI Storage Class Memory driver on bare metal Alastair D'Silva
2019-10-28  2:43   ` Oliver O'Halloran
2019-11-08  7:10   ` Frederic Barrat
2019-11-11  9:46   ` Aneesh Kumar K.V
2019-10-25  4:47 ` [PATCH 10/10] ocxl: Conditionally bind SCM devices to the generic OCXL driver Alastair D'Silva
2019-10-26  6:43   ` Christoph Hellwig
2019-11-06  3:46   ` Andrew Donnellan
2019-11-07 18:08   ` Frederic Barrat
2019-11-08  0:37     ` Alastair D'Silva
2019-10-25  7:57 ` [PATCH 00/10] Add support for OpenCAPI SCM devices Geert Uytterhoeven

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