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Groups > linux.kernel > #1624006
| From | Dan Williams <dan.j.williams@intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v2 31/33] libnvdimm, nfit: enable support for volatile ranges |
| Date | 2017-04-15 04:50 +0200 |
| Message-ID | <twlWH-ZQ-45@gated-at.bofh.it> (permalink) |
| References | <twlN0-WA-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Allow volatile nfit ranges to participate in all the same infrastructure
provided for persistent memory regions. A resulting resulting namespace
device will still be called "pmem", but the parent region type will be
"nd_volatile". This is in preparation for disabling the dax ->flush()
operation in the pmem driver when it is hosted on a volatile range.
Cc: Jan Kara <jack@suse.cz>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/acpi/nfit/core.c | 9 ++++++++-
drivers/nvdimm/bus.c | 10 +++++-----
drivers/nvdimm/core.c | 2 +-
drivers/nvdimm/dax_devs.c | 2 +-
drivers/nvdimm/dimm_devs.c | 2 +-
drivers/nvdimm/namespace_devs.c | 8 ++++----
drivers/nvdimm/nd-core.h | 9 +++++++++
drivers/nvdimm/pfn_devs.c | 4 ++--
drivers/nvdimm/region_devs.c | 27 ++++++++++++++-------------
9 files changed, 45 insertions(+), 28 deletions(-)
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 8b4c6212737c..6ac31846c4df 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2162,6 +2162,13 @@ static bool nfit_spa_is_virtual(struct acpi_nfit_system_address *spa)
nfit_spa_type(spa) == NFIT_SPA_PCD);
}
+static bool nfit_spa_is_volatile(struct acpi_nfit_system_address *spa)
+{
+ return (nfit_spa_type(spa) == NFIT_SPA_VDISK ||
+ nfit_spa_type(spa) == NFIT_SPA_VCD ||
+ nfit_spa_type(spa) == NFIT_SPA_VOLATILE);
+}
+
static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
struct nfit_spa *nfit_spa)
{
@@ -2236,7 +2243,7 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
ndr_desc);
if (!nfit_spa->nd_region)
rc = -ENOMEM;
- } else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE) {
+ } else if (nfit_spa_is_volatile(spa)) {
nfit_spa->nd_region = nvdimm_volatile_region_create(nvdimm_bus,
ndr_desc);
if (!nfit_spa->nd_region)
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 351bac8f6503..d4173fbdba28 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -37,13 +37,13 @@ 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;
@@ -55,7 +55,7 @@ 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));
@@ -64,7 +64,7 @@ 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;
@@ -771,7 +771,7 @@ void wait_nvdimm_bus_probe_idle(struct device *dev)
static int pmem_active(struct device *dev, void *data)
{
- if (is_nd_pmem(dev) && dev->driver)
+ if (is_memory(dev) && dev->driver)
return -EBUSY;
return 0;
}
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index 9303cfeb8bee..875ef4cecb35 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 45fa82cae87c..6a92b84c8072 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 8b721321be5b..d814e5adab5c 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -403,7 +403,7 @@ 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 2580f6655bea..4fa3c1fce6bf 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -111,7 +111,7 @@ 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;
}
@@ -786,7 +786,7 @@ 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);
@@ -1875,7 +1875,7 @@ 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);
@@ -2155,7 +2155,7 @@ 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 8623e57c2ce3..f26263cc8a36 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -63,7 +63,16 @@ 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 6c033c9a2f06..7cc77684316b 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)))
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index 5976f6c0407f..2df259010720 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -168,6 +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);
@@ -214,7 +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++) {
@@ -242,7 +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];
@@ -278,7 +283,7 @@ static ssize_t set_cookie_show(struct device *dev,
struct nd_region *nd_region = to_nd_region(dev);
struct nd_interleave_set *nd_set = nd_region->nd_set;
- if (is_nd_pmem(dev) && nd_set)
+ if (is_memory(dev) && nd_set)
/* pass, should be precluded by region_visible */;
else
return -ENXIO;
@@ -305,7 +310,7 @@ 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) {
@@ -469,10 +474,10 @@ 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 (a != &dev_attr_set_cookie.attr
@@ -483,7 +488,7 @@ 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;
@@ -535,7 +540,7 @@ 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);
@@ -553,12 +558,8 @@ 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)
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH v2 00/33] dax: introduce dax_operations Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:40 +0200
[PATCH v2 11/33] dm: add dax_device and dax_operations support Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
Re: [PATCH v2 11/33] dm: add dax_device and dax_operations support Dan Williams <dan.j.williams@intel.com> - 2017-04-15 17:20 +0200
[PATCH v2 26/33] x86, dax, libnvdimm: move wb_cache_pmem() to libnvdimm Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 13/33] ext2, ext4, xfs: retrieve dax_device for iomap operations Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 32/33] filesystem-dax: gate calls to dax_flush() on QUEUE_FLAG_WC Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 22/33] dax, pmem: introduce an optional 'flush' dax_operation Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 20/33] dm: add ->copy_from_iter() dax operation support Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 21/33] filesystem-dax: convert to dax_copy_from_iter() Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 24/33] filesystem-dax: convert to dax_flush() Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 30/33] libnvdimm, pmem: fix persistence warning Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 23/33] dm: add ->flush() dax operation support Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 15/33] filesystem-dax: convert to dax_direct_access() Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 18/33] x86, dax, pmem: remove indirection around memcpy_from_pmem() Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 29/33] uio, libnvdimm, pmem: implement cache bypass for all copy_from_iter() operations Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
Re: [PATCH v2 29/33] uio, libnvdimm, pmem: implement cache bypass for all copy_from_iter() operations Jan Kara <jack@suse.cz> - 2017-04-24 17:10 +0200
[PATCH v2 10/33] dax: introduce dax_direct_access() Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 28/33] x86, libnvdimm, dax: stop abusing __copy_user_nocache Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 25/33] x86, dax: replace clear_pmem() with open coded memset + dax_ops->flush Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 14/33] Revert "block: use DAX for partition table reads" Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 27/33] x86, libnvdimm, pmem: move arch_invalidate_pmem() to libnvdimm Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 17/33] block: remove block_device_operations ->direct_access() Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 33/33] libnvdimm, pmem: disable dax flushing when pmem is fronting a volatile region Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 16/33] block, dax: convert bdev_dax_supported() to dax_direct_access() Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 19/33] dax, pmem: introduce 'copy_from_iter' dax operation Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 12/33] dm: teach dm-targets to use a dax_device + dax_operations Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 31/33] libnvdimm, nfit: enable support for volatile ranges Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
[PATCH v2 02/33] dax: refactor dax-fs into a generic provider of 'struct dax_device' instances Dan Williams <dan.j.williams@intel.com> - 2017-04-15 04:50 +0200
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