svn commit: r344476 - in head/sys: dev/nvdimm modules/nvdimm

Ben Widawsky bwidawsk at FreeBSD.org
Fri Feb 22 19:54:31 UTC 2019 

Author: bwidawsk
Date: Fri Feb 22 19:54:28 2019
New Revision: 344476
URL: https://svnweb.freebsd.org/changeset/base/344476

Log:
  nvdimm: Simple namespace support
  
  Add support for simple NVDIMM v1.2 namespaces from the UEFI
  version 2.7 specification. The combination of NVDIMM regions and
  labels can lead to a wide variety of namespace layouts. Here we
  support a simple subset of namespaces where each NVDIMM SPA range
  is composed of a single region per member dimm.
  
  Submitted by:	D Scott Phillips <d.scott.phillips at intel.com>
  Discussed with:	kib
  MFC after:	1 week
  Sponsored by:	Intel Corporation
  Differential Revision:	https://reviews.freebsd.org/D18736

Added:
  head/sys/dev/nvdimm/nvdimm_ns.c   (contents, props changed)
Modified:
  head/sys/dev/nvdimm/nvdimm.c
  head/sys/dev/nvdimm/nvdimm_var.h
  head/sys/modules/nvdimm/Makefile

Modified: head/sys/dev/nvdimm/nvdimm.c
==============================================================================
--- head/sys/dev/nvdimm/nvdimm.c	Fri Feb 22 19:54:24 2019	(r344475)
+++ head/sys/dev/nvdimm/nvdimm.c	Fri Feb 22 19:54:28 2019	(r344476)
@@ -462,6 +462,7 @@ nvdimm_root_create_spas(struct nvdimm_root_dev *dev, A
 			free(spa, M_NVDIMM);
 			break;
 		}
+		nvdimm_create_namespaces(spa_mapping, nfitbl);
 		SLIST_INSERT_HEAD(&dev->spas, spa_mapping, link);
 	}
 	free(spas, M_NVDIMM);
@@ -519,6 +520,7 @@ nvdimm_root_detach(device_t dev)
 
 	root = device_get_softc(dev);
 	SLIST_FOREACH_SAFE(spa, &root->spas, link, next) {
+		nvdimm_destroy_namespaces(spa);
 		nvdimm_spa_fini(spa);
 		SLIST_REMOVE_HEAD(&root->spas, link);
 		free(spa, M_NVDIMM);

Added: head/sys/dev/nvdimm/nvdimm_ns.c
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/sys/dev/nvdimm/nvdimm_ns.c	Fri Feb 22 19:54:28 2019	(r344476)
@@ -0,0 +1,97 @@
+/*-
+ * Copyright (c) 2018 Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bio.h>
+#include <sys/bus.h>
+#include <sys/malloc.h>
+#include <sys/uuid.h>
+
+#include <contrib/dev/acpica/include/acpi.h>
+#include <dev/acpica/acpivar.h>
+#include <dev/nvdimm/nvdimm_var.h>
+
+int
+nvdimm_create_namespaces(struct SPA_mapping *spa, ACPI_TABLE_NFIT *nfitbl)
+{
+	ACPI_NFIT_MEMORY_MAP **regions;
+	struct nvdimm_dev *nv;
+	struct nvdimm_label_entry *e;
+	struct nvdimm_namespace *ns;
+	nfit_handle_t dimm_handle;
+	char *name;
+	int i, error, num_regions;
+
+	acpi_nfit_get_region_mappings_by_spa_range(nfitbl, spa->spa_nfit_idx,
+	    &regions, &num_regions);
+	if (num_regions == 0 || num_regions != regions[0]->InterleaveWays) {
+		free(regions, M_NVDIMM);
+		return (ENXIO);
+	}
+	dimm_handle = regions[0]->DeviceHandle;
+	nv = nvdimm_find_by_handle(dimm_handle);
+	if (nv == NULL) {
+		free(regions, M_NVDIMM);
+		return (ENXIO);
+	}
+	i = 0;
+	error = 0;
+	SLIST_FOREACH(e, &nv->labels, link) {
+		ns = malloc(sizeof(struct nvdimm_namespace), M_NVDIMM,
+		    M_WAITOK | M_ZERO);
+		ns->dev.spa_domain = spa->dev.spa_domain;
+		ns->dev.spa_phys_base = spa->dev.spa_phys_base +
+		    regions[0]->RegionOffset +
+		    num_regions *
+		    (e->label.dimm_phys_addr - regions[0]->Address);
+		ns->dev.spa_len = num_regions * e->label.raw_size;
+		ns->dev.spa_efi_mem_flags = spa->dev.spa_efi_mem_flags;
+		asprintf(&name, M_NVDIMM, "spa%dns%d", spa->spa_nfit_idx, i);
+		error = nvdimm_spa_dev_init(&ns->dev, name);
+		free(name, M_NVDIMM);
+		if (error != 0)
+			break;
+		SLIST_INSERT_HEAD(&spa->namespaces, ns, link);
+		i++;
+	}
+	free(regions, M_NVDIMM);
+	return (error);
+}
+
+void
+nvdimm_destroy_namespaces(struct SPA_mapping *spa)
+{
+	struct nvdimm_namespace *ns, *next;
+
+	SLIST_FOREACH_SAFE(ns, &spa->namespaces, link, next) {
+		SLIST_REMOVE_HEAD(&spa->namespaces, link);
+		nvdimm_spa_dev_fini(&ns->dev);
+		free(ns, M_NVDIMM);
+	}
+}

Modified: head/sys/dev/nvdimm/nvdimm_var.h
==============================================================================
--- head/sys/dev/nvdimm/nvdimm_var.h	Fri Feb 22 19:54:24 2019	(r344475)
+++ head/sys/dev/nvdimm/nvdimm_var.h	Fri Feb 22 19:54:28 2019	(r344476)
@@ -139,11 +139,18 @@ struct g_spa {
 	bool			spa_g_proc_exiting;
 };
 
+struct nvdimm_namespace {
+	SLIST_ENTRY(nvdimm_namespace) link;
+	struct SPA_mapping	*spa;
+	struct nvdimm_spa_dev	dev;
+};
+
 struct SPA_mapping {
 	SLIST_ENTRY(SPA_mapping) link;
 	enum SPA_mapping_type	spa_type;
 	int			spa_nfit_idx;
 	struct nvdimm_spa_dev	dev;
+	SLIST_HEAD(, nvdimm_namespace) namespaces;
 };
 
 MALLOC_DECLARE(M_NVDIMM);
@@ -167,5 +174,7 @@ int nvdimm_spa_init(struct SPA_mapping *spa, ACPI_NFIT
 void nvdimm_spa_fini(struct SPA_mapping *spa);
 int nvdimm_spa_dev_init(struct nvdimm_spa_dev *dev, const char *name);
 void nvdimm_spa_dev_fini(struct nvdimm_spa_dev *dev);
+int nvdimm_create_namespaces(struct SPA_mapping *spa, ACPI_TABLE_NFIT *nfitbl);
+void nvdimm_destroy_namespaces(struct SPA_mapping *spa);
 
 #endif		/* __DEV_NVDIMM_VAR_H__ */

Modified: head/sys/modules/nvdimm/Makefile
==============================================================================
--- head/sys/modules/nvdimm/Makefile	Fri Feb 22 19:54:24 2019	(r344475)
+++ head/sys/modules/nvdimm/Makefile	Fri Feb 22 19:54:28 2019	(r344476)
@@ -5,6 +5,7 @@
 KMOD=	nvdimm
 SRCS=	nvdimm.c \
 	nvdimm_nfit.c \
+	nvdimm_ns.c \
 	nvdimm_spa.c
 
 SRCS+=	acpi_if.h bus_if.h device_if.h

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