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Message-ID: <20150625090554.40066.69562.stgit@dwillia2-desk3.jf.intel.com>
Date: Thu, 25 Jun 2015 05:36:17 -0400
From: Dan Williams <dan.j.williams@...el.com>
To: linux-nvdimm@...ts.01.org
Cc: boaz@...xistor.com, Neil Brown <neilb@...e.de>,
Dave Chinner <david@...morbit.com>,
Lv Zheng <lv.zheng@...el.com>,
"H. Peter Anvin" <hpa@...or.com>, mingo@...nel.org,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Robert Moore <robert.moore@...el.com>, hch@....de,
linux-acpi@...r.kernel.org, Jeff Moyer <jmoyer@...hat.com>,
Ingo Molnar <mingo@...hat.com>,
Ross Zwisler <ross.zwisler@...ux.intel.com>,
Vishal Verma <vishal.l.verma@...ux.intel.com>,
Jens Axboe <axboe@...com>,
Matthew Wilcox <matthew.r.wilcox@...el.com>,
Thomas Gleixner <tglx@...utronix.de>, axboe@...nel.dk,
toshi.kani@...com,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Greg KH <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org,
Andy Lutomirski <luto@...capital.net>,
linux-fsdevel@...r.kernel.org
Subject: [PATCH v2 00/17] libnvdimm: ->rw_bytes(), BLK, BTT, PMEM api,
and unit tests
->rw_bytes() is a byte-aligned interface for accessing persistent memory
namespaces. The primary consumer of the ->rw_bytes() interface is the
BTT library.
BTT is a library that converts a byte-accessible namespace into a disk
with atomic sector update semantics (prevents sector tearing on crash or
power loss). The sinister aspect of sector tearing is that most
applications do not know they have a atomic sector dependency. At least
today's disk's rarely ever tear sectors and if they do you almost
certainly get a CRC error on access. NVDIMMs will always tear and
always silently.
BLK is a driver for NVDIMMs that provide sliding mmio windows to access
persistent memory.
The PMEM api defines ensures writes have hit persistent media relative
to the completion of an i/o.
Changes since v1 [1]:
1/ The ->rw_bytes() interface has been removed from struct
block_device_operations and is now a common operation of NVDIMM
namespace devices. Accordingly a BTT instance is now a libnvdimm
device-model peer of a namespace rather than a stacked block device
driver. The BTT is no longer a driver in its own right, instead it is a
extension library used by a BLK or PMEM namespace. This clarifies the
device model and reduced the core implementation by a couple hundred
lines of code. (Christoph)
2/ Kill ND_MAX_REGIONS and ND_IOSTAT Kconfig options. (Christoph)
3/ Killed the access out of range check separately in PMEM, BLK, and BTT
(Christoph)
4/ Kill the central helper for blk queue properties (Christoph)
5/ Added Toshi's numa patches with a change to set the numa info at
device create time rather than driver probe time.
6/ Cherry picked the PMEM api. The wider arch cleanups in the full
pmem-api series are too large / invasive to pick up at this late date.
The keeps the pmem.c driver x86-only for one more cycle.
[1]: https://lists.01.org/pipermail/linux-nvdimm/2015-June/001246.html
Diffstat since v1:
Documentation/nvdimm/btt.txt | 24 ++-
Documentation/nvdimm/nvdimm.txt | 79 ++++----
arch/x86/Kconfig | 1 +
arch/x86/include/asm/cacheflush.h | 72 +++++++
arch/x86/include/asm/io.h | 6 +
drivers/acpi/nfit.c | 17 +-
drivers/acpi/numa.c | 50 ++++-
drivers/nvdimm/Kconfig | 56 ++----
drivers/nvdimm/Makefile | 2 +-
drivers/nvdimm/blk.c | 148 +++++++-------
drivers/nvdimm/btt.c | 166 ++++------------
drivers/nvdimm/btt_devs.c | 403 +++++++++++++++++---------------------
drivers/nvdimm/bus.c | 190 ++++--------------
drivers/nvdimm/core.c | 30 ---
drivers/nvdimm/label.c | 5 +-
drivers/nvdimm/namespace_devs.c | 252 +++++++++++++++++++-----
drivers/nvdimm/nd-core.h | 47 +----
drivers/nvdimm/nd.h | 51 +++--
drivers/nvdimm/pmem.c | 185 ++++++++---------
drivers/nvdimm/region.c | 85 +-------
drivers/nvdimm/region_devs.c | 182 +++++++++++++----
include/linux/acpi.h | 5 +
include/linux/blkdev.h | 44 -----
include/linux/compiler.h | 2 +
include/linux/libnvdimm.h | 2 +
include/linux/nd.h | 63 +++++-
include/linux/pmem.h | 153 +++++++++++++++
include/uapi/linux/ndctl.h | 2 -
lib/Kconfig | 3 +
tools/testing/nvdimm/Kbuild | 2 +-
tools/testing/nvdimm/test/nfit.c | 1 +
31 files changed, 1272 insertions(+), 1056 deletions(-)
create mode 100644 include/linux/pmem.h
---
Dan Williams (8):
libnvdimm: infrastructure for btt devices
tools/testing/nvdimm: libnvdimm unit test infrastructure
libnvdimm: Non-Volatile Devices
libnvdimm, pmem: fix up max_hw_sectors
pmem: make_request cleanups
libnvdimm: enable iostat
pmem: flag pmem block devices as non-rotational
libnvdimm, nfit: handle unarmed dimms, mark namespaces read-only
Ross Zwisler (2):
libnvdimm, nfit, nd_blk: driver for BLK-mode access persistent memory
arch, x86: pmem api for ensuring durability of persistent memory updates
Toshi Kani (3):
acpi: Add acpi_map_pxm_to_online_node()
libnvdimm: Set numa_node to NVDIMM devices
libnvdimm: Add sysfs numa_node to NVDIMM devices
Vishal Verma (4):
nd_btt: atomic sector updates
fs/block_dev.c: skip rw_page if bdev has integrity
libnvdimm, btt: add support for blk integrity
libnvdimm, blk: add support for blk integrity
Documentation/nvdimm/btt.txt | 283 ++++++
Documentation/nvdimm/nvdimm.txt | 808 ++++++++++++++++++
MAINTAINERS | 39 +
arch/x86/Kconfig | 1
arch/x86/include/asm/cacheflush.h | 72 ++
arch/x86/include/asm/io.h | 6
drivers/acpi/nfit.c | 498 +++++++++++
drivers/acpi/nfit.h | 58 +
drivers/acpi/numa.c | 50 +
drivers/nvdimm/Kconfig | 42 +
drivers/nvdimm/Makefile | 7
drivers/nvdimm/blk.c | 384 +++++++++
drivers/nvdimm/btt.c | 1479 +++++++++++++++++++++++++++++++++
drivers/nvdimm/btt.h | 185 ++++
drivers/nvdimm/btt_devs.c | 426 ++++++++++
drivers/nvdimm/bus.c | 60 +
drivers/nvdimm/core.c | 69 ++
drivers/nvdimm/dimm_devs.c | 9
drivers/nvdimm/label.c | 5
drivers/nvdimm/namespace_devs.c | 295 ++++++-
drivers/nvdimm/nd-core.h | 5
drivers/nvdimm/nd.h | 86 ++
drivers/nvdimm/pmem.c | 181 ++--
drivers/nvdimm/region.c | 28 +
drivers/nvdimm/region_devs.c | 238 +++++
fs/block_dev.c | 4
include/linux/acpi.h | 5
include/linux/compiler.h | 2
include/linux/libnvdimm.h | 32 +
include/linux/nd.h | 63 +
include/linux/pmem.h | 153 +++
lib/Kconfig | 3
tools/testing/nvdimm/Kbuild | 40 +
tools/testing/nvdimm/Makefile | 7
tools/testing/nvdimm/config_check.c | 15
tools/testing/nvdimm/test/Kbuild | 8
tools/testing/nvdimm/test/iomap.c | 151 +++
tools/testing/nvdimm/test/nfit.c | 1116 +++++++++++++++++++++++++
tools/testing/nvdimm/test/nfit_test.h | 29 +
39 files changed, 6759 insertions(+), 183 deletions(-)
create mode 100644 Documentation/nvdimm/btt.txt
create mode 100644 Documentation/nvdimm/nvdimm.txt
create mode 100644 drivers/nvdimm/blk.c
create mode 100644 drivers/nvdimm/btt.c
create mode 100644 drivers/nvdimm/btt.h
create mode 100644 drivers/nvdimm/btt_devs.c
create mode 100644 include/linux/pmem.h
create mode 100644 tools/testing/nvdimm/Kbuild
create mode 100644 tools/testing/nvdimm/Makefile
create mode 100644 tools/testing/nvdimm/config_check.c
create mode 100644 tools/testing/nvdimm/test/Kbuild
create mode 100644 tools/testing/nvdimm/test/iomap.c
create mode 100644 tools/testing/nvdimm/test/nfit.c
create mode 100644 tools/testing/nvdimm/test/nfit_test.h
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