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-rw-r--r--drivers/nvdimm/bus.c8
-rw-r--r--drivers/nvdimm/claim.c6
-rw-r--r--drivers/nvdimm/core.c2
-rw-r--r--drivers/nvdimm/dax_devs.c2
-rw-r--r--drivers/nvdimm/dimm_devs.c10
-rw-r--r--drivers/nvdimm/namespace_devs.c14
-rw-r--r--drivers/nvdimm/nd-core.h9
-rw-r--r--drivers/nvdimm/pfn_devs.c4
-rw-r--r--drivers/nvdimm/pmem.c40
-rw-r--r--drivers/nvdimm/pmem.h14
-rw-r--r--drivers/nvdimm/region_devs.c43
11 files changed, 107 insertions, 45 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 9730db48a01b..937fafa1886a 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -38,13 +38,13 @@ static int to_nd_device_type(struct device *dev)
{
if (is_nvdimm(dev))
return ND_DEVICE_DIMM;
- else if (is_nd_pmem(dev))
+ else if (is_memory(dev))
return ND_DEVICE_REGION_PMEM;
else if (is_nd_blk(dev))
return ND_DEVICE_REGION_BLK;
else if (is_nd_dax(dev))
return ND_DEVICE_DAX_PMEM;
- else if (is_nd_pmem(dev->parent) || is_nd_blk(dev->parent))
+ else if (is_nd_region(dev->parent))
return nd_region_to_nstype(to_nd_region(dev->parent));
return 0;
@@ -56,7 +56,7 @@ static int nvdimm_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
* Ensure that region devices always have their numa node set as
* early as possible.
*/
- if (is_nd_pmem(dev) || is_nd_blk(dev))
+ if (is_nd_region(dev))
set_dev_node(dev, to_nd_region(dev)->numa_node);
return add_uevent_var(env, "MODALIAS=" ND_DEVICE_MODALIAS_FMT,
to_nd_device_type(dev));
@@ -65,7 +65,7 @@ static int nvdimm_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
static struct module *to_bus_provider(struct device *dev)
{
/* pin bus providers while regions are enabled */
- if (is_nd_pmem(dev) || is_nd_blk(dev)) {
+ if (is_nd_region(dev)) {
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
return nvdimm_bus->nd_desc->module;
diff --git a/drivers/nvdimm/claim.c b/drivers/nvdimm/claim.c
index f8ad92b4dcd2..47770460f3d3 100644
--- a/drivers/nvdimm/claim.c
+++ b/drivers/nvdimm/claim.c
@@ -12,8 +12,8 @@
*/
#include <linux/device.h>
#include <linux/sizes.h>
-#include <linux/pmem.h>
#include "nd-core.h"
+#include "pmem.h"
#include "pfn.h"
#include "btt.h"
#include "nd.h"
@@ -300,12 +300,12 @@ static int nsio_rw_bytes(struct nd_namespace_common *ndns,
cleared /= 512;
badblocks_clear(&nsio->bb, sector, cleared);
}
- invalidate_pmem(nsio->addr + offset, size);
+ arch_invalidate_pmem(nsio->addr + offset, size);
} else
rc = -EIO;
}
- memcpy_to_pmem(nsio->addr + offset, buf, size);
+ memcpy_flushcache(nsio->addr + offset, buf, size);
nvdimm_flush(to_nd_region(ndns->dev.parent));
return rc;
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index ed0bf174d128..7cd99b1f8596 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -504,7 +504,7 @@ void nvdimm_badblocks_populate(struct nd_region *nd_region,
struct nvdimm_bus *nvdimm_bus;
struct list_head *poison_list;
- if (!is_nd_pmem(&nd_region->dev)) {
+ if (!is_memory(&nd_region->dev)) {
dev_WARN_ONCE(&nd_region->dev, 1,
"%s only valid for pmem regions\n", __func__);
return;
diff --git a/drivers/nvdimm/dax_devs.c b/drivers/nvdimm/dax_devs.c
index 59f676381ae5..1bf2bd318371 100644
--- a/drivers/nvdimm/dax_devs.c
+++ b/drivers/nvdimm/dax_devs.c
@@ -89,7 +89,7 @@ struct device *nd_dax_create(struct nd_region *nd_region)
struct device *dev = NULL;
struct nd_dax *nd_dax;
- if (!is_nd_pmem(&nd_region->dev))
+ if (!is_memory(&nd_region->dev))
return NULL;
nd_dax = nd_dax_alloc(nd_region);
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index 9852a3355509..f0d1b7e5de01 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -20,6 +20,7 @@
#include <linux/mm.h>
#include "nd-core.h"
#include "label.h"
+#include "pmem.h"
#include "nd.h"
static DEFINE_IDA(dimm_ida);
@@ -235,6 +236,13 @@ struct nvdimm *nd_blk_region_to_dimm(struct nd_blk_region *ndbr)
}
EXPORT_SYMBOL_GPL(nd_blk_region_to_dimm);
+unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr)
+{
+ /* pmem mapping properties are private to libnvdimm */
+ return ARCH_MEMREMAP_PMEM;
+}
+EXPORT_SYMBOL_GPL(nd_blk_memremap_flags);
+
struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping)
{
struct nvdimm *nvdimm = nd_mapping->nvdimm;
@@ -411,7 +419,7 @@ int alias_dpa_busy(struct device *dev, void *data)
struct resource *res;
int i;
- if (!is_nd_pmem(dev))
+ if (!is_memory(dev))
return 0;
nd_region = to_nd_region(dev);
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index c96e31330213..5f1c6756e57c 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -14,10 +14,10 @@
#include <linux/device.h>
#include <linux/sort.h>
#include <linux/slab.h>
-#include <linux/pmem.h>
#include <linux/list.h>
#include <linux/nd.h>
#include "nd-core.h"
+#include "pmem.h"
#include "nd.h"
static void namespace_io_release(struct device *dev)
@@ -112,7 +112,7 @@ static int is_uuid_busy(struct device *dev, void *data)
static int is_namespace_uuid_busy(struct device *dev, void *data)
{
- if (is_nd_pmem(dev) || is_nd_blk(dev))
+ if (is_nd_region(dev))
return device_for_each_child(dev, data, is_uuid_busy);
return 0;
}
@@ -155,11 +155,7 @@ bool pmem_should_map_pages(struct device *dev)
IORES_DESC_NONE) == REGION_MIXED)
return false;
-#ifdef ARCH_MEMREMAP_PMEM
return ARCH_MEMREMAP_PMEM == MEMREMAP_WB;
-#else
- return false;
-#endif
}
EXPORT_SYMBOL(pmem_should_map_pages);
@@ -810,7 +806,7 @@ static int __reserve_free_pmem(struct device *dev, void *data)
struct nd_label_id label_id;
int i;
- if (!is_nd_pmem(dev))
+ if (!is_memory(dev))
return 0;
nd_region = to_nd_region(dev);
@@ -2057,7 +2053,7 @@ static struct device *nd_namespace_pmem_create(struct nd_region *nd_region)
struct resource *res;
struct device *dev;
- if (!is_nd_pmem(&nd_region->dev))
+ if (!is_memory(&nd_region->dev))
return NULL;
nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
@@ -2360,7 +2356,7 @@ static struct device **scan_labels(struct nd_region *nd_region)
}
dev->parent = &nd_region->dev;
devs[count++] = dev;
- } else if (is_nd_pmem(&nd_region->dev)) {
+ } else if (is_memory(&nd_region->dev)) {
/* clean unselected labels */
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct list_head *l, *e;
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index 4c4bd209e725..86bc19ae30da 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -64,7 +64,16 @@ struct blk_alloc_info {
bool is_nvdimm(struct device *dev);
bool is_nd_pmem(struct device *dev);
+bool is_nd_volatile(struct device *dev);
bool is_nd_blk(struct device *dev);
+static inline bool is_nd_region(struct device *dev)
+{
+ return is_nd_pmem(dev) || is_nd_blk(dev) || is_nd_volatile(dev);
+}
+static inline bool is_memory(struct device *dev)
+{
+ return is_nd_pmem(dev) || is_nd_volatile(dev);
+}
struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev);
int __init nvdimm_bus_init(void);
void nvdimm_bus_exit(void);
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index 5e4041276d6f..5fcb6f5b22a2 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -331,7 +331,7 @@ struct device *nd_pfn_create(struct nd_region *nd_region)
struct nd_pfn *nd_pfn;
struct device *dev;
- if (!is_nd_pmem(&nd_region->dev))
+ if (!is_memory(&nd_region->dev))
return NULL;
nd_pfn = nd_pfn_alloc(nd_region);
@@ -354,7 +354,7 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
if (!pfn_sb || !ndns)
return -ENODEV;
- if (!is_nd_pmem(nd_pfn->dev.parent))
+ if (!is_memory(nd_pfn->dev.parent))
return -ENODEV;
if (nvdimm_read_bytes(ndns, SZ_4K, pfn_sb, sizeof(*pfn_sb), 0))
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 4a9cffc14512..e0f6d83c5a6e 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -28,7 +28,7 @@
#include <linux/blk-mq.h>
#include <linux/pfn_t.h>
#include <linux/slab.h>
-#include <linux/pmem.h>
+#include <linux/uio.h>
#include <linux/dax.h>
#include <linux/nd.h>
#include "pmem.h"
@@ -72,7 +72,7 @@ static int pmem_clear_poison(struct pmem_device *pmem, phys_addr_t offset,
sysfs_notify_dirent(pmem->bb_state);
}
- invalidate_pmem(pmem->virt_addr + offset, len);
+ arch_invalidate_pmem(pmem->virt_addr + offset, len);
return rc;
}
@@ -82,7 +82,7 @@ static void write_pmem(void *pmem_addr, struct page *page,
{
void *mem = kmap_atomic(page);
- memcpy_to_pmem(pmem_addr, mem + off, len);
+ memcpy_flushcache(pmem_addr, mem + off, len);
kunmap_atomic(mem);
}
@@ -237,8 +237,27 @@ static long pmem_dax_direct_access(struct dax_device *dax_dev,
return __pmem_direct_access(pmem, pgoff, nr_pages, kaddr, pfn);
}
+static size_t pmem_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff,
+ void *addr, size_t bytes, struct iov_iter *i)
+{
+ return copy_from_iter_flushcache(addr, bytes, i);
+}
+
+static void pmem_dax_flush(struct dax_device *dax_dev, pgoff_t pgoff,
+ void *addr, size_t size)
+{
+ arch_wb_cache_pmem(addr, size);
+}
+
static const struct dax_operations pmem_dax_ops = {
.direct_access = pmem_dax_direct_access,
+ .copy_from_iter = pmem_copy_from_iter,
+ .flush = pmem_dax_flush,
+};
+
+static const struct attribute_group *pmem_attribute_groups[] = {
+ &dax_attribute_group,
+ NULL,
};
static void pmem_release_queue(void *q)
@@ -267,14 +286,15 @@ static int pmem_attach_disk(struct device *dev,
struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
struct nd_region *nd_region = to_nd_region(dev->parent);
struct vmem_altmap __altmap, *altmap = NULL;
+ int nid = dev_to_node(dev), fua, wbc;
struct resource *res = &nsio->res;
struct nd_pfn *nd_pfn = NULL;
struct dax_device *dax_dev;
- int nid = dev_to_node(dev);
struct nd_pfn_sb *pfn_sb;
struct pmem_device *pmem;
struct resource pfn_res;
struct request_queue *q;
+ struct device *gendev;
struct gendisk *disk;
void *addr;
@@ -296,8 +316,12 @@ static int pmem_attach_disk(struct device *dev,
dev_set_drvdata(dev, pmem);
pmem->phys_addr = res->start;
pmem->size = resource_size(res);
- if (nvdimm_has_flush(nd_region) < 0)
+ fua = nvdimm_has_flush(nd_region);
+ if (!IS_ENABLED(CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE) || fua < 0) {
dev_warn(dev, "unable to guarantee persistence of writes\n");
+ fua = 0;
+ }
+ wbc = nvdimm_has_cache(nd_region);
if (!devm_request_mem_region(dev, res->start, resource_size(res),
dev_name(&ndns->dev))) {
@@ -341,7 +365,7 @@ static int pmem_attach_disk(struct device *dev,
return PTR_ERR(addr);
pmem->virt_addr = addr;
- blk_queue_write_cache(q, true, true);
+ blk_queue_write_cache(q, wbc, fua);
blk_queue_make_request(q, pmem_make_request);
blk_queue_physical_block_size(q, PAGE_SIZE);
blk_queue_logical_block_size(q, pmem_sector_size(ndns));
@@ -372,8 +396,12 @@ static int pmem_attach_disk(struct device *dev,
put_disk(disk);
return -ENOMEM;
}
+ dax_write_cache(dax_dev, wbc);
pmem->dax_dev = dax_dev;
+ gendev = disk_to_dev(disk);
+ gendev->groups = pmem_attribute_groups;
+
device_add_disk(dev, disk);
if (devm_add_action_or_reset(dev, pmem_release_disk, pmem))
return -ENOMEM;
diff --git a/drivers/nvdimm/pmem.h b/drivers/nvdimm/pmem.h
index c5917f040fa7..5434321cad67 100644
--- a/drivers/nvdimm/pmem.h
+++ b/drivers/nvdimm/pmem.h
@@ -5,6 +5,20 @@
#include <linux/pfn_t.h>
#include <linux/fs.h>
+#ifdef CONFIG_ARCH_HAS_PMEM_API
+#define ARCH_MEMREMAP_PMEM MEMREMAP_WB
+void arch_wb_cache_pmem(void *addr, size_t size);
+void arch_invalidate_pmem(void *addr, size_t size);
+#else
+#define ARCH_MEMREMAP_PMEM MEMREMAP_WT
+static inline void arch_wb_cache_pmem(void *addr, size_t size)
+{
+}
+static inline void arch_invalidate_pmem(void *addr, size_t size)
+{
+}
+#endif
+
/* this definition is in it's own header for tools/testing/nvdimm to consume */
struct pmem_device {
/* One contiguous memory region per device */
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index ab141f8b5140..5954cfbea3fc 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -15,7 +15,6 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/hash.h>
-#include <linux/pmem.h>
#include <linux/sort.h>
#include <linux/io.h>
#include <linux/nd.h>
@@ -169,6 +168,11 @@ bool is_nd_blk(struct device *dev)
return dev ? dev->type == &nd_blk_device_type : false;
}
+bool is_nd_volatile(struct device *dev)
+{
+ return dev ? dev->type == &nd_volatile_device_type : false;
+}
+
struct nd_region *to_nd_region(struct device *dev)
{
struct nd_region *nd_region = container_of(dev, struct nd_region, dev);
@@ -215,7 +219,7 @@ EXPORT_SYMBOL_GPL(nd_blk_region_set_provider_data);
*/
int nd_region_to_nstype(struct nd_region *nd_region)
{
- if (is_nd_pmem(&nd_region->dev)) {
+ if (is_memory(&nd_region->dev)) {
u16 i, alias;
for (i = 0, alias = 0; i < nd_region->ndr_mappings; i++) {
@@ -243,7 +247,7 @@ static ssize_t size_show(struct device *dev,
struct nd_region *nd_region = to_nd_region(dev);
unsigned long long size = 0;
- if (is_nd_pmem(dev)) {
+ if (is_memory(dev)) {
size = nd_region->ndr_size;
} else if (nd_region->ndr_mappings == 1) {
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
@@ -309,7 +313,7 @@ static ssize_t set_cookie_show(struct device *dev,
struct nd_interleave_set *nd_set = nd_region->nd_set;
ssize_t rc = 0;
- if (is_nd_pmem(dev) && nd_set)
+ if (is_memory(dev) && nd_set)
/* pass, should be precluded by region_visible */;
else
return -ENXIO;
@@ -363,7 +367,7 @@ resource_size_t nd_region_available_dpa(struct nd_region *nd_region)
if (!ndd)
return 0;
- if (is_nd_pmem(&nd_region->dev)) {
+ if (is_memory(&nd_region->dev)) {
available += nd_pmem_available_dpa(nd_region,
nd_mapping, &overlap);
if (overlap > blk_max_overlap) {
@@ -549,10 +553,10 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n)
struct nd_interleave_set *nd_set = nd_region->nd_set;
int type = nd_region_to_nstype(nd_region);
- if (!is_nd_pmem(dev) && a == &dev_attr_pfn_seed.attr)
+ if (!is_memory(dev) && a == &dev_attr_pfn_seed.attr)
return 0;
- if (!is_nd_pmem(dev) && a == &dev_attr_dax_seed.attr)
+ if (!is_memory(dev) && a == &dev_attr_dax_seed.attr)
return 0;
if (!is_nd_pmem(dev) && a == &dev_attr_badblocks.attr)
@@ -580,7 +584,7 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n)
|| type == ND_DEVICE_NAMESPACE_BLK)
&& a == &dev_attr_available_size.attr)
return a->mode;
- else if (is_nd_pmem(dev) && nd_set)
+ else if (is_memory(dev) && nd_set)
return a->mode;
return 0;
@@ -637,7 +641,7 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
{
struct nd_region *nd_region;
- if (!probe && (is_nd_pmem(dev) || is_nd_blk(dev))) {
+ if (!probe && is_nd_region(dev)) {
int i;
nd_region = to_nd_region(dev);
@@ -655,12 +659,8 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
if (ndd)
atomic_dec(&nvdimm->busy);
}
-
- if (is_nd_pmem(dev))
- return;
}
- if (dev->parent && (is_nd_blk(dev->parent) || is_nd_pmem(dev->parent))
- && probe) {
+ if (dev->parent && is_nd_region(dev->parent) && probe) {
nd_region = to_nd_region(dev->parent);
nvdimm_bus_lock(dev);
if (nd_region->ns_seed == dev)
@@ -1048,8 +1048,8 @@ void nvdimm_flush(struct nd_region *nd_region)
* The first wmb() is needed to 'sfence' all previous writes
* such that they are architecturally visible for the platform
* buffer flush. Note that we've already arranged for pmem
- * writes to avoid the cache via arch_memcpy_to_pmem(). The
- * final wmb() ensures ordering for the NVDIMM flush write.
+ * writes to avoid the cache via memcpy_flushcache(). The final
+ * wmb() ensures ordering for the NVDIMM flush write.
*/
wmb();
for (i = 0; i < nd_region->ndr_mappings; i++)
@@ -1071,8 +1071,9 @@ int nvdimm_has_flush(struct nd_region *nd_region)
{
int i;
- /* no nvdimm == flushing capability unknown */
- if (nd_region->ndr_mappings == 0)
+ /* no nvdimm or pmem api == flushing capability unknown */
+ if (nd_region->ndr_mappings == 0
+ || !IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API))
return -ENXIO;
for (i = 0; i < nd_region->ndr_mappings; i++) {
@@ -1092,6 +1093,12 @@ int nvdimm_has_flush(struct nd_region *nd_region)
}
EXPORT_SYMBOL_GPL(nvdimm_has_flush);
+int nvdimm_has_cache(struct nd_region *nd_region)
+{
+ return is_nd_pmem(&nd_region->dev);
+}
+EXPORT_SYMBOL_GPL(nvdimm_has_cache);
+
void __exit nd_region_devs_exit(void)
{
ida_destroy(&region_ida);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 10:01:00 +0000