Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752913AbbDRT3i (ORCPT ); Sat, 18 Apr 2015 15:29:38 -0400 Received: from mail-wg0-f51.google.com ([74.125.82.51]:34201 "EHLO mail-wg0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752493AbbDRT3e (ORCPT ); Sat, 18 Apr 2015 15:29:34 -0400 MIME-Version: 1.0 In-Reply-To: <20150418013256.25237.96403.stgit@dwillia2-desk3.amr.corp.intel.com> References: <20150418013256.25237.96403.stgit@dwillia2-desk3.amr.corp.intel.com> Date: Sat, 18 Apr 2015 12:29:33 -0700 Message-ID: Subject: Re: [PATCH 00/21] ND: NFIT-Defined / NVDIMM Subsystem From: Dan Williams To: "linux-nvdimm@lists.01.org" Cc: Boaz Harrosh , Vishal Verma , Neil Brown , Greg KH , "Rafael J. Wysocki" , Dave Chinner , Robert Moore , Andy Lutomirski , Jens Axboe , linux-acpi@vger.kernel.org, Jeff Moyer , Nicholas Moulin , "H. Peter Anvin" , Ross Zwisler , Christoph Hellwig , Ingo Molnar , "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2339 Lines: 46 On Fri, Apr 17, 2015 at 6:35 PM, Dan Williams wrote: > Since 2010 Intel has included non-volatile memory support on a few > storage-focused platforms with a feature named ADR (Asynchronous DRAM > Refresh). These platforms were mostly targeted at custom applications > and never enjoyed standard discovery mechanisms for platform firmware > to advertise non-volatile memory capabilities. This now changes with > the publication of version 6 of the ACPI specification [1] and its > inclusion of a new table for describing platform memory capabilities. > The NVDIMM Firmware Interface Table (NFIT), along with new EFI and E820 > memory types, enumerates persistent memory ranges, memory-mapped-I/O > apertures, physical memory devices (DIMMs), and their associated > properties. > > The ND-subsystem wraps a Linux device driver model around the objects > and address boundaries defined in the specification and introduces 3 new > drivers. > > nd_pmem: NFIT enabled version of the existing 'pmem' driver [2] > nd_blk: mmio aperture method for accessing persistent storage > nd_btt: give persistent memory disk semantics (atomic sector update) > > See the documentation in patch2 for more details, and there is > supplemental documentation on pmem.io [4]. Please review, and > patches welcome... > > For kicking the tires, this release is accompanied by a userspace > management library 'ndctl' that includes unit tests (make check) for all > of the kernel ABIs. The nfit_test.ko module can be used to explore a > sample NFIT topology. > > [1]: http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf > [2]: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/log/?h=x86/pmem > [3]: https://github.com/pmem/ndctl > [4]: http://pmem.io/documents/ nd.git and ndctl.git trees are now up to date. I'll aim to keep nd.git non-rebasing, but what eventually goes upstream is likely to be a re-flowed patch set. ndctl.git won't rebase. nd.git: git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git nd ndctl.git: https://github.com/pmem/ndctl.git -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/