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authorDan Williams <dan.j.williams@intel.com>2019-11-07 04:43:31 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-11-07 17:44:29 +0300
commit33dd70752cd76f4d883a165a674f13121a4155ed (patch)
treefd7d361649e73adafe59ade9db9429a1be4e0516 /drivers/nvdimm
parent199c8471761273b7e287914cee968ddf21dfbfe0 (diff)
downloadlinux-33dd70752cd76f4d883a165a674f13121a4155ed.tar.xz
lib: Uplevel the pmem "region" ida to a global allocator
In preparation for handling platform differentiated memory types beyond persistent memory, uplevel the "region" identifier to a global number space. This enables a device-dax instance to be registered to any memory type with guaranteed unique names. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/Kconfig1
-rw-r--r--drivers/nvdimm/core.c1
-rw-r--r--drivers/nvdimm/nd-core.h1
-rw-r--r--drivers/nvdimm/region_devs.c13
4 files changed, 5 insertions, 11 deletions
diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig
index 36af7af6b7cf..b7d1eb38b27d 100644
--- a/drivers/nvdimm/Kconfig
+++ b/drivers/nvdimm/Kconfig
@@ -4,6 +4,7 @@ menuconfig LIBNVDIMM
depends on PHYS_ADDR_T_64BIT
depends on HAS_IOMEM
depends on BLK_DEV
+ select MEMREGION
help
Generic support for non-volatile memory devices including
ACPI-6-NFIT defined resources. On platforms that define an
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index 9204f1e9fd14..e592c4964674 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -455,7 +455,6 @@ static __exit void libnvdimm_exit(void)
nd_region_exit();
nvdimm_exit();
nvdimm_bus_exit();
- nd_region_devs_exit();
nvdimm_devs_exit();
}
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index 25fa121104d0..aa059439fca0 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -114,7 +114,6 @@ struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev);
int __init nvdimm_bus_init(void);
void nvdimm_bus_exit(void);
void nvdimm_devs_exit(void);
-void nd_region_devs_exit(void);
struct nd_region;
void nd_region_advance_seeds(struct nd_region *nd_region, struct device *dev);
void nd_region_create_ns_seed(struct nd_region *nd_region);
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index ef423ba1a711..fbf34cf688f4 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -3,6 +3,7 @@
* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
*/
#include <linux/scatterlist.h>
+#include <linux/memregion.h>
#include <linux/highmem.h>
#include <linux/sched.h>
#include <linux/slab.h>
@@ -19,7 +20,6 @@
*/
#include <linux/io-64-nonatomic-hi-lo.h>
-static DEFINE_IDA(region_ida);
static DEFINE_PER_CPU(int, flush_idx);
static int nvdimm_map_flush(struct device *dev, struct nvdimm *nvdimm, int dimm,
@@ -133,7 +133,7 @@ static void nd_region_release(struct device *dev)
put_device(&nvdimm->dev);
}
free_percpu(nd_region->lane);
- ida_simple_remove(&region_ida, nd_region->id);
+ memregion_free(nd_region->id);
if (is_nd_blk(dev))
kfree(to_nd_blk_region(dev));
else
@@ -985,7 +985,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
if (!region_buf)
return NULL;
- nd_region->id = ida_simple_get(&region_ida, 0, 0, GFP_KERNEL);
+ nd_region->id = memregion_alloc(GFP_KERNEL);
if (nd_region->id < 0)
goto err_id;
@@ -1044,7 +1044,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
return nd_region;
err_percpu:
- ida_simple_remove(&region_ida, nd_region->id);
+ memregion_free(nd_region->id);
err_id:
kfree(region_buf);
return NULL;
@@ -1216,8 +1216,3 @@ int nd_region_conflict(struct nd_region *nd_region, resource_size_t start,
return device_for_each_child(&nvdimm_bus->dev, &ctx, region_conflict);
}
-
-void __exit nd_region_devs_exit(void)
-{
- ida_destroy(&region_ida);
-}