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nvdimm: Simple namespace support

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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@intel.com>
Discussed with:	kib
MFC after:	1 week
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D18736
This commit is contained in:
Ben Widawsky 2019-02-22 19:54:28 +00:00
parent ad30b2f267
commit 8ebb6dddb5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=344476
4 changed files with 109 additions and 0 deletions
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2
sys/dev/nvdimm/nvdimm.c
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@ -462,6 +462,7 @@ nvdimm_root_create_spas(struct nvdimm_root_dev *dev, ACPI_TABLE_NFIT *nfitbl)
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);

97
sys/dev/nvdimm/nvdimm_ns.c Normal file
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@ -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);
}
}

9
sys/dev/nvdimm/nvdimm_var.h
View File

@ -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_SYSTEM_ADDRESS *nfitaddr,
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__ */

1
sys/modules/nvdimm/Makefile
View File

@ -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