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authorDan Williams <dan.j.williams@intel.com>2016-10-07 16:46:24 -0700
committerDan Williams <dan.j.williams@intel.com>2016-10-07 16:46:24 -0700
commit178d6f4be8bf42b298bedf8ea2a00754100e0c4e (patch)
treea71865455adc31082a4ad21a942286520a7b5da1 /drivers/nvdimm
parentdb58028ee4e360430de8e3b48f657dc798ee6591 (diff)
parent98a29c39dc689298d2f834f40102cba752eb49c0 (diff)
Merge branch 'for-4.9/libnvdimm' into libnvdimm-for-next
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/bus.c2
-rw-r--r--drivers/nvdimm/core.c73
-rw-r--r--drivers/nvdimm/dimm.c11
-rw-r--r--drivers/nvdimm/dimm_devs.c226
-rw-r--r--drivers/nvdimm/label.c192
-rw-r--r--drivers/nvdimm/namespace_devs.c792
-rw-r--r--drivers/nvdimm/nd-core.h24
-rw-r--r--drivers/nvdimm/nd.h29
-rw-r--r--drivers/nvdimm/pmem.c28
-rw-r--r--drivers/nvdimm/region_devs.c58
10 files changed, 1035 insertions, 400 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 935866fe5ec2..a8b6949a8778 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -217,6 +217,8 @@ long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
return rc;
if (cmd_rc < 0)
return cmd_rc;
+
+ nvdimm_clear_from_poison_list(nvdimm_bus, phys, len);
return clear_err.cleared;
}
EXPORT_SYMBOL_GPL(nvdimm_clear_poison);
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index 4d7bbd2df5c0..7ceba08774b6 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -547,11 +547,12 @@ void nvdimm_badblocks_populate(struct nd_region *nd_region,
}
EXPORT_SYMBOL_GPL(nvdimm_badblocks_populate);
-static int add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
+static int add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length,
+ gfp_t flags)
{
struct nd_poison *pl;
- pl = kzalloc(sizeof(*pl), GFP_KERNEL);
+ pl = kzalloc(sizeof(*pl), flags);
if (!pl)
return -ENOMEM;
@@ -567,7 +568,7 @@ static int bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
struct nd_poison *pl;
if (list_empty(&nvdimm_bus->poison_list))
- return add_poison(nvdimm_bus, addr, length);
+ return add_poison(nvdimm_bus, addr, length, GFP_KERNEL);
/*
* There is a chance this is a duplicate, check for those first.
@@ -587,7 +588,7 @@ static int bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
* as any overlapping ranges will get resolved when the list is consumed
* and converted to badblocks
*/
- return add_poison(nvdimm_bus, addr, length);
+ return add_poison(nvdimm_bus, addr, length, GFP_KERNEL);
}
int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
@@ -602,6 +603,70 @@ int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
}
EXPORT_SYMBOL_GPL(nvdimm_bus_add_poison);
+void nvdimm_clear_from_poison_list(struct nvdimm_bus *nvdimm_bus,
+ phys_addr_t start, unsigned int len)
+{
+ struct list_head *poison_list = &nvdimm_bus->poison_list;
+ u64 clr_end = start + len - 1;
+ struct nd_poison *pl, *next;
+
+ nvdimm_bus_lock(&nvdimm_bus->dev);
+ WARN_ON_ONCE(list_empty(poison_list));
+
+ /*
+ * [start, clr_end] is the poison interval being cleared.
+ * [pl->start, pl_end] is the poison_list entry we're comparing
+ * the above interval against. The poison list entry may need
+ * to be modified (update either start or length), deleted, or
+ * split into two based on the overlap characteristics
+ */
+
+ list_for_each_entry_safe(pl, next, poison_list, list) {
+ u64 pl_end = pl->start + pl->length - 1;
+
+ /* Skip intervals with no intersection */
+ if (pl_end < start)
+ continue;
+ if (pl->start > clr_end)
+ continue;
+ /* Delete completely overlapped poison entries */
+ if ((pl->start >= start) && (pl_end <= clr_end)) {
+ list_del(&pl->list);
+ kfree(pl);
+ continue;
+ }
+ /* Adjust start point of partially cleared entries */
+ if ((start <= pl->start) && (clr_end > pl->start)) {
+ pl->length -= clr_end - pl->start + 1;
+ pl->start = clr_end + 1;
+ continue;
+ }
+ /* Adjust pl->length for partial clearing at the tail end */
+ if ((pl->start < start) && (pl_end <= clr_end)) {
+ /* pl->start remains the same */
+ pl->length = start - pl->start;
+ continue;
+ }
+ /*
+ * If clearing in the middle of an entry, we split it into
+ * two by modifying the current entry to represent one half of
+ * the split, and adding a new entry for the second half.
+ */
+ if ((pl->start < start) && (pl_end > clr_end)) {
+ u64 new_start = clr_end + 1;
+ u64 new_len = pl_end - new_start + 1;
+
+ /* Add new entry covering the right half */
+ add_poison(nvdimm_bus, new_start, new_len, GFP_NOIO);
+ /* Adjust this entry to cover the left half */
+ pl->length = start - pl->start;
+ continue;
+ }
+ }
+ nvdimm_bus_unlock(&nvdimm_bus->dev);
+}
+EXPORT_SYMBOL_GPL(nvdimm_clear_from_poison_list);
+
#ifdef CONFIG_BLK_DEV_INTEGRITY
int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
{
diff --git a/drivers/nvdimm/dimm.c b/drivers/nvdimm/dimm.c
index 71d12bb67339..619834e144d1 100644
--- a/drivers/nvdimm/dimm.c
+++ b/drivers/nvdimm/dimm.c
@@ -26,6 +26,14 @@ static int nvdimm_probe(struct device *dev)
struct nvdimm_drvdata *ndd;
int rc;
+ rc = nvdimm_check_config_data(dev);
+ if (rc) {
+ /* not required for non-aliased nvdimm, ex. NVDIMM-N */
+ if (rc == -ENOTTY)
+ rc = 0;
+ return rc;
+ }
+
ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
if (!ndd)
return -ENOMEM;
@@ -72,6 +80,9 @@ static int nvdimm_remove(struct device *dev)
{
struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
+ if (!ndd)
+ return 0;
+
nvdimm_bus_lock(dev);
dev_set_drvdata(dev, NULL);
nvdimm_bus_unlock(dev);
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index d9bba5edd8dc..d614493ad5ac 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -28,28 +28,30 @@ static DEFINE_IDA(dimm_ida);
* Retrieve bus and dimm handle and return if this bus supports
* get_config_data commands
*/
-static int __validate_dimm(struct nvdimm_drvdata *ndd)
+int nvdimm_check_config_data(struct device *dev)
{
- struct nvdimm *nvdimm;
-
- if (!ndd)
- return -EINVAL;
-
- nvdimm = to_nvdimm(ndd->dev);
+ struct nvdimm *nvdimm = to_nvdimm(dev);
- if (!nvdimm->cmd_mask)
- return -ENXIO;
- if (!test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask))
- return -ENXIO;
+ if (!nvdimm->cmd_mask ||
+ !test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask)) {
+ if (nvdimm->flags & NDD_ALIASING)
+ return -ENXIO;
+ else
+ return -ENOTTY;
+ }
return 0;
}
static int validate_dimm(struct nvdimm_drvdata *ndd)
{
- int rc = __validate_dimm(ndd);
+ int rc;
- if (rc && ndd)
+ if (!ndd)
+ return -EINVAL;
+
+ rc = nvdimm_check_config_data(ndd->dev);
+ if (rc)
dev_dbg(ndd->dev, "%pf: %s error: %d\n",
__builtin_return_address(0), __func__, rc);
return rc;
@@ -263,6 +265,12 @@ const char *nvdimm_name(struct nvdimm *nvdimm)
}
EXPORT_SYMBOL_GPL(nvdimm_name);
+struct kobject *nvdimm_kobj(struct nvdimm *nvdimm)
+{
+ return &nvdimm->dev.kobj;
+}
+EXPORT_SYMBOL_GPL(nvdimm_kobj);
+
unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm)
{
return nvdimm->cmd_mask;
@@ -378,40 +386,166 @@ struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
}
EXPORT_SYMBOL_GPL(nvdimm_create);
+int alias_dpa_busy(struct device *dev, void *data)
+{
+ resource_size_t map_end, blk_start, new, busy;
+ struct blk_alloc_info *info = data;
+ struct nd_mapping *nd_mapping;
+ struct nd_region *nd_region;
+ struct nvdimm_drvdata *ndd;
+ struct resource *res;
+ int i;
+
+ if (!is_nd_pmem(dev))
+ return 0;
+
+ nd_region = to_nd_region(dev);
+ for (i = 0; i < nd_region->ndr_mappings; i++) {
+ nd_mapping = &nd_region->mapping[i];
+ if (nd_mapping->nvdimm == info->nd_mapping->nvdimm)
+ break;
+ }
+
+ if (i >= nd_region->ndr_mappings)
+ return 0;
+
+ ndd = to_ndd(nd_mapping);
+ map_end = nd_mapping->start + nd_mapping->size - 1;
+ blk_start = nd_mapping->start;
+
+ /*
+ * In the allocation case ->res is set to free space that we are
+ * looking to validate against PMEM aliasing collision rules
+ * (i.e. BLK is allocated after all aliased PMEM).
+ */
+ if (info->res) {
+ if (info->res->start >= nd_mapping->start
+ && info->res->start < map_end)
+ /* pass */;
+ else
+ return 0;
+ }
+
+ retry:
+ /*
+ * Find the free dpa from the end of the last pmem allocation to
+ * the end of the interleave-set mapping that is not already
+ * covered by a blk allocation.
+ */
+ busy = 0;
+ for_each_dpa_resource(ndd, res) {
+ if ((res->start >= blk_start && res->start < map_end)
+ || (res->end >= blk_start
+ && res->end <= map_end)) {
+ if (strncmp(res->name, "pmem", 4) == 0) {
+ new = max(blk_start, min(map_end + 1,
+ res->end + 1));
+ if (new != blk_start) {
+ blk_start = new;
+ goto retry;
+ }
+ } else
+ busy += min(map_end, res->end)
+ - max(nd_mapping->start, res->start) + 1;
+ } else if (nd_mapping->start > res->start
+ && map_end < res->end) {
+ /* total eclipse of the PMEM region mapping */
+ busy += nd_mapping->size;
+ break;
+ }
+ }
+
+ /* update the free space range with the probed blk_start */
+ if (info->res && blk_start > info->res->start) {
+ info->res->start = max(info->res->start, blk_start);
+ if (info->res->start > info->res->end)
+ info->res->end = info->res->start - 1;
+ return 1;
+ }
+
+ info->available -= blk_start - nd_mapping->start + busy;
+
+ return 0;
+}
+
+static int blk_dpa_busy(struct device *dev, void *data)
+{
+ struct blk_alloc_info *info = data;
+ struct nd_mapping *nd_mapping;
+ struct nd_region *nd_region;
+ resource_size_t map_end;
+ int i;
+
+ if (!is_nd_pmem(dev))
+ return 0;
+
+ nd_region = to_nd_region(dev);
+ for (i = 0; i < nd_region->ndr_mappings; i++) {
+ nd_mapping = &nd_region->mapping[i];
+ if (nd_mapping->nvdimm == info->nd_mapping->nvdimm)
+ break;
+ }
+
+ if (i >= nd_region->ndr_mappings)
+ return 0;
+
+ map_end = nd_mapping->start + nd_mapping->size - 1;
+ if (info->res->start >= nd_mapping->start
+ && info->res->start < map_end) {
+ if (info->res->end <= map_end) {
+ info->busy = 0;
+ return 1;
+ } else {
+ info->busy -= info->res->end - map_end;
+ return 0;
+ }
+ } else if (info->res->end >= nd_mapping->start
+ && info->res->end <= map_end) {
+ info->busy -= nd_mapping->start - info->res->start;
+ return 0;
+ } else {
+ info->busy -= nd_mapping->size;
+ return 0;
+ }
+}
+
/**
* nd_blk_available_dpa - account the unused dpa of BLK region
* @nd_mapping: container of dpa-resource-root + labels
*
- * Unlike PMEM, BLK namespaces can occupy discontiguous DPA ranges.
+ * Unlike PMEM, BLK namespaces can occupy discontiguous DPA ranges, but
+ * we arrange for them to never start at an lower dpa than the last
+ * PMEM allocation in an aliased region.
*/
-resource_size_t nd_blk_available_dpa(struct nd_mapping *nd_mapping)
+resource_size_t nd_blk_available_dpa(struct nd_region *nd_region)
{
+ struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
+ struct nd_mapping *nd_mapping = &nd_region->mapping[0];
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
- resource_size_t map_end, busy = 0, available;
+ struct blk_alloc_info info = {
+ .nd_mapping = nd_mapping,
+ .available = nd_mapping->size,
+ .res = NULL,
+ };
struct resource *res;
if (!ndd)
return 0;
- map_end = nd_mapping->start + nd_mapping->size - 1;
- for_each_dpa_resource(ndd, res)
- if (res->start >= nd_mapping->start && res->start < map_end) {
- resource_size_t end = min(map_end, res->end);
+ device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy);
- busy += end - res->start + 1;
- } else if (res->end >= nd_mapping->start
- && res->end <= map_end) {
- busy += res->end - nd_mapping->start;
- } else if (nd_mapping->start > res->start
- && nd_mapping->start < res->end) {
- /* total eclipse of the BLK region mapping */
- busy += nd_mapping->size;
- }
+ /* now account for busy blk allocations in unaliased dpa */
+ for_each_dpa_resource(ndd, res) {
+ if (strncmp(res->name, "blk", 3) != 0)
+ continue;
- available = map_end - nd_mapping->start + 1;
- if (busy < available)
- return available - busy;
- return 0;
+ info.res = res;
+ info.busy = resource_size(res);
+ device_for_each_child(&nvdimm_bus->dev, &info, blk_dpa_busy);
+ info.available -= info.busy;
+ }
+
+ return info.available;
}
/**
@@ -443,21 +577,16 @@ resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
map_start = nd_mapping->start;
map_end = map_start + nd_mapping->size - 1;
blk_start = max(map_start, map_end + 1 - *overlap);
- for_each_dpa_resource(ndd, res)
+ for_each_dpa_resource(ndd, res) {
if (res->start >= map_start && res->start < map_end) {
if (strncmp(res->name, "blk", 3) == 0)
- blk_start = min(blk_start, res->start);
- else if (res->start != map_start) {
+ blk_start = min(blk_start,
+ max(map_start, res->start));
+ else if (res->end > map_end) {
reason = "misaligned to iset";
goto err;
- } else {
- if (busy) {
- reason = "duplicate overlapping PMEM reservations?";
- goto err;
- }
+ } else
busy += resource_size(res);
- continue;
- }
} else if (res->end >= map_start && res->end <= map_end) {
if (strncmp(res->name, "blk", 3) == 0) {
/*
@@ -466,15 +595,14 @@ resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
* be used for BLK.
*/
blk_start = map_start;
- } else {
- reason = "misaligned to iset";
- goto err;
- }
+ } else
+ busy += resource_size(res);
} else if (map_start > res->start && map_start < res->end) {
/* total eclipse of the mapping */
busy += nd_mapping->size;
blk_start = map_start;
}
+ }
*overlap = map_end + 1 - blk_start;
available = blk_start - map_start;
@@ -483,10 +611,6 @@ resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
return 0;
err:
- /*
- * Something is wrong, PMEM must align with the start of the
- * interleave set, and there can only be one allocation per set.
- */
nd_dbg_dpa(nd_region, ndd, res, "%s\n", reason);
return 0;
}
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 96526dcfdd37..fac7cabe8f56 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -494,11 +494,13 @@ static int __pmem_label_update(struct nd_region *nd_region,
struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm,
int pos)
{
- u64 cookie = nd_region_interleave_set_cookie(nd_region), rawsize;
+ u64 cookie = nd_region_interleave_set_cookie(nd_region);
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
- struct nd_namespace_label *victim_label;
+ struct nd_label_ent *label_ent, *victim = NULL;
struct nd_namespace_label *nd_label;
struct nd_namespace_index *nsindex;
+ struct nd_label_id label_id;
+ struct resource *res;
unsigned long *free;
u32 nslot, slot;
size_t offset;
@@ -507,6 +509,16 @@ static int __pmem_label_update(struct nd_region *nd_region,
if (!preamble_next(ndd, &nsindex, &free, &nslot))
return -ENXIO;
+ nd_label_gen_id(&label_id, nspm->uuid, 0);
+ for_each_dpa_resource(ndd, res)
+ if (strcmp(res->name, label_id.id) == 0)
+ break;
+
+ if (!res) {
+ WARN_ON_ONCE(1);
+ return -ENXIO;
+ }
+
/* allocate and write the label to the staging (next) index */
slot = nd_label_alloc_slot(ndd);
if (slot == UINT_MAX)
@@ -522,11 +534,10 @@ static int __pmem_label_update(struct nd_region *nd_region,
nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings);
nd_label->position = __cpu_to_le16(pos);
nd_label->isetcookie = __cpu_to_le64(cookie);
- rawsize = div_u64(resource_size(&nspm->nsio.res),
- nd_region->ndr_mappings);
- nd_label->rawsize = __cpu_to_le64(rawsize);
- nd_label->dpa = __cpu_to_le64(nd_mapping->start);
+ nd_label->rawsize = __cpu_to_le64(resource_size(res));
+ nd_label->dpa = __cpu_to_le64(res->start);
nd_label->slot = __cpu_to_le32(slot);
+ nd_dbg_dpa(nd_region, ndd, res, "%s\n", __func__);
/* update label */
offset = nd_label_offset(ndd, nd_label);
@@ -536,38 +547,43 @@ static int __pmem_label_update(struct nd_region *nd_region,
return rc;
/* Garbage collect the previous label */
- victim_label = nd_mapping->labels[0];
- if (victim_label) {
- slot = to_slot(ndd, victim_label);
- nd_label_free_slot(ndd, slot);
+ mutex_lock(&nd_mapping->lock);
+ list_for_each_entry(label_ent, &nd_mapping->labels, list) {
+ if (!label_ent->label)
+ continue;
+ if (memcmp(nspm->uuid, label_ent->label->uuid,
+ NSLABEL_UUID_LEN) != 0)
+ continue;
+ victim = label_ent;
+ list_move_tail(&victim->list, &nd_mapping->labels);
+ break;
+ }
+ if (victim) {
dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot);
+ slot = to_slot(ndd, victim->label);
+ nd_label_free_slot(ndd, slot);
+ victim->label = NULL;
}
/* update index */
rc = nd_label_write_index(ndd, ndd->ns_next,
nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0);
- if (rc < 0)
- return rc;
-
- nd_mapping->labels[0] = nd_label;
-
- return 0;
-}
-
-static void del_label(struct nd_mapping *nd_mapping, int l)
-{
- struct nd_namespace_label *next_label, *nd_label;
- struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
- unsigned int slot;
- int j;
-
- nd_label = nd_mapping->labels[l];
- slot = to_slot(ndd, nd_label);
- dev_vdbg(ndd->dev, "%s: clear: %d\n", __func__, slot);
+ if (rc == 0) {
+ list_for_each_entry(label_ent, &nd_mapping->labels, list)
+ if (!label_ent->label) {
+ label_ent->label = nd_label;
+ nd_label = NULL;
+ break;
+ }
+ dev_WARN_ONCE(&nspm->nsio.common.dev, nd_label,
+ "failed to track label: %d\n",
+ to_slot(ndd, nd_label));
+ if (nd_label)
+ rc = -ENXIO;
+ }
+ mutex_unlock(&nd_mapping->lock);
- for (j = l; (next_label = nd_mapping->labels[j + 1]); j++)
- nd_mapping->labels[j] = next_label;
- nd_mapping->labels[j] = NULL;
+ return rc;
}
static bool is_old_resource(struct resource *res, struct resource **list, int n)
@@ -607,14 +623,16 @@ static int __blk_label_update(struct nd_region *nd_region,
struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk,
int num_labels)
{
- int i, l, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO;
+ int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_namespace_label *nd_label;
+ struct nd_label_ent *label_ent, *e;
struct nd_namespace_index *nsindex;
unsigned long *free, *victim_map = NULL;
struct resource *res, **old_res_list;
struct nd_label_id label_id;
u8 uuid[NSLABEL_UUID_LEN];
+ LIST_HEAD(list);
u32 nslot, slot;
if (!preamble_next(ndd, &nsindex, &free, &nslot))
@@ -736,15 +754,22 @@ static int __blk_label_update(struct nd_region *nd_region,
* entries in nd_mapping->labels
*/
nlabel = 0;
- for_each_label(l, nd_label, nd_mapping->labels) {
+ mutex_lock(&nd_mapping->lock);
+ list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
+ nd_label = label_ent->label;
+ if (!nd_label)
+ continue;
nlabel++;
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
if (memcmp(uuid, nsblk->uuid, NSLABEL_UUID_LEN) != 0)
continue;
nlabel--;
- del_label(nd_mapping, l);
- l--; /* retry with the new label at this index */
+ list_move(&label_ent->list, &list);
+ label_ent->label = NULL;
}
+ list_splice_tail_init(&list, &nd_mapping->labels);
+ mutex_unlock(&nd_mapping->lock);
+
if (nlabel + nsblk->num_resources > num_labels) {
/*
* Bug, we can't end up with more resources than
@@ -755,6 +780,15 @@ static int __blk_label_update(struct nd_region *nd_region,
goto out;
}
+ mutex_lock(&nd_mapping->lock);
+ label_ent = list_first_entry_or_null(&nd_mapping->labels,
+ typeof(*label_ent), list);
+ if (!label_ent) {
+ WARN_ON(1);
+ mutex_unlock(&nd_mapping->lock);
+ rc = -ENXIO;
+ goto out;
+ }
for_each_clear_bit_le(slot, free, nslot) {
nd_label = nd_label_base(ndd) + slot;
memcpy(uuid, nd_label->uuid, NSLABEL_UUID_LEN);
@@ -762,11 +796,19 @@ static int __blk_label_update(struct nd_region *nd_region,
continue;
res = to_resource(ndd, nd_label);
res->flags &= ~DPA_RESOURCE_ADJUSTED;
- dev_vdbg(&nsblk->common.dev, "assign label[%d] slot: %d\n",
- l, slot);
- nd_mapping->labels[l++] = nd_label;
+ dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot);
+ list_for_each_entry_from(label_ent, &nd_mapping->labels, list) {
+ if (label_ent->label)
+ continue;
+ label_ent->label = nd_label;
+ nd_label = NULL;
+ break;
+ }
+ if (nd_label)
+ dev_WARN(&nsblk->common.dev,
+ "failed to track label slot%d\n", slot);
}
- nd_mapping->labels[l] = NULL;
+ mutex_unlock(&nd_mapping->lock);
out:
kfree(old_res_list);
@@ -788,32 +830,28 @@ static int __blk_label_update(struct nd_region *nd_region,
static int init_labels(struct nd_mapping *nd_mapping, int num_labels)
{
- int i, l, old_num_labels = 0;
+ int i, old_num_labels = 0;
+ struct nd_label_ent *label_ent;
struct nd_namespace_index *nsindex;
- struct nd_namespace_label *nd_label;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
- size_t size = (num_labels + 1) * sizeof(struct nd_namespace_label *);
- for_each_label(l, nd_label, nd_mapping->labels)
+ mutex_lock(&nd_mapping->lock);
+ list_for_each_entry(label_ent, &nd_mapping->labels, list)
old_num_labels++;
+ mutex_unlock(&nd_mapping->lock);
/*
* We need to preserve all the old labels for the mapping so
* they can be garbage collected after writing the new labels.
*/
- if (num_labels > old_num_labels) {
- struct nd_namespace_label **labels;
-
- labels = krealloc(nd_mapping->labels, size, GFP_KERNEL);
- if (!labels)
+ for (i = old_num_labels; i < num_labels; i++) {
+ label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL);
+ if (!label_ent)
return -ENOMEM;
- nd_mapping->labels = labels;
+ mutex_lock(&nd_mapping->lock);
+ list_add_tail(&label_ent->list, &nd_mapping->labels);
+ mutex_unlock(&nd_mapping->lock);
}
- if (!nd_mapping->labels)
- return -ENOMEM;
-
- for (i = old_num_labels; i <= num_labels; i++)
- nd_mapping->labels[i] = NULL;
if (ndd->ns_current == -1 || ndd->ns_next == -1)
/* pass */;
@@ -837,42 +875,45 @@ static int init_labels(struct nd_mapping *nd_mapping, int num_labels)
static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid)
{
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
- struct nd_namespace_label *nd_label;
+ struct nd_label_ent *label_ent, *e;
struct nd_namespace_index *nsindex;
u8 label_uuid[NSLABEL_UUID_LEN];
- int l, num_freed = 0;
unsigned long *free;
+ LIST_HEAD(list);
u32 nslot, slot;
+ int active = 0;
if (!uuid)
return 0;
/* no index || no labels == nothing to delete */
- if (!preamble_next(ndd, &nsindex, &free, &nslot)
- || !nd_mapping->labels)
+ if (!preamble_next(ndd, &nsindex, &free, &nslot))
return 0;
- for_each_label(l, nd_label, nd_mapping->labels) {
+ mutex_lock(&nd_mapping->lock);
+ list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
+ struct nd_namespace_label *nd_label = label_ent->label;
+
+ if (!nd_label)
+ continue;
+ active++;
memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
if (memcmp(label_uuid, uuid, NSLABEL_UUID_LEN) != 0)
continue;
+ active--;
slot = to_slot(ndd, nd_label);
nd_label_free_slot(ndd, slot);
dev_dbg(ndd->dev, "%s: free: %d\n", __func__, slot);
- del_label(nd_mapping, l);
- num_freed++;
- l--; /* retry with new label at this index */
+ list_move_tail(&label_ent->list, &list);
+ label_ent->label = NULL;
}
+ list_splice_tail_init(&list, &nd_mapping->labels);
- if (num_freed > l) {
- /*
- * num_freed will only ever be > l when we delete the last
- * label
- */
- kfree(nd_mapping->labels);
- nd_mapping->labels = NULL;
- dev_dbg(ndd->dev, "%s: no more labels\n", __func__);
+ if (active == 0) {
+ nd_mapping_free_labels(nd_mapping);
+ dev_dbg(ndd->dev, "%s: no more active labels\n", __func__);
}
+ mutex_unlock(&nd_mapping->lock);
return nd_label_write_index(ndd, ndd->ns_next,
nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0);
@@ -885,7 +926,9 @@ int nd_pmem_namespace_label_update(struct nd_region *nd_region,
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
- int rc;
+ struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+ struct resource *res;
+ int rc, count = 0;
if (size == 0) {
rc = del_labels(nd_mapping, nspm->uuid);
@@ -894,7 +937,12 @@ int nd_pmem_namespace_label_update(struct nd_region *nd_region,
continue;
}
- rc = init_labels(nd_mapping, 1);
+ for_each_dpa_resource(ndd, res)
+ if (strncmp(res->name, "pmem", 3) == 0)
+ count++;
+ WARN_ON_ONCE(!count);
+
+ rc = init_labels(nd_mapping, count);
if (rc < 0)
return rc;
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index c5e3196c45b0..3509cff68ef9 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -12,8 +12,10 @@
*/
#include <linux/module.h>
#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 "nd.h"
@@ -28,7 +30,10 @@ static void namespace_io_release(struct device *dev)
static void namespace_pmem_release(struct device *dev)
{
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
+ struct nd_region *nd_region = to_nd_region(dev->parent);
+ if (nspm->id >= 0)
+ ida_simple_remove(&nd_region->ns_ida, nspm->id);
kfree(nspm->alt_name);
kfree(nspm->uuid);
kfree(nspm);
@@ -62,17 +67,17 @@ static struct device_type namespace_blk_device_type = {
.release = namespace_blk_release,
};
-static bool is_namespace_pmem(struct device *dev)
+static bool is_namespace_pmem(const struct device *dev)
{
return dev ? dev->type == &namespace_pmem_device_type : false;
}
-static bool is_namespace_blk(struct device *dev)
+static bool is_namespace_blk(const struct device *dev)
{
return dev ? dev->type == &namespace_blk_device_type : false;
}
-static bool is_namespace_io(struct device *dev)
+static bool is_namespace_io(const struct device *dev)
{
return dev ? dev->type == &namespace_io_device_type : false;
}
@@ -168,7 +173,21 @@ const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
suffix = "s";
if (is_namespace_pmem(&ndns->dev) || is_namespace_io(&ndns->dev)) {
- sprintf(name, "pmem%d%s", nd_region->id, suffix ? suffix : "");
+ int nsidx = 0;
+
+ if (is_namespace_pmem(&ndns->dev)) {
+ struct nd_namespace_pmem *nspm;
+
+ nspm = to_nd_namespace_pmem(&ndns->dev);
+ nsidx = nspm->id;
+ }
+
+ if (nsidx)
+ sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx,
+ suffix ? suffix : "");
+ else
+ sprintf(name, "pmem%d%s", nd_region->id,
+ suffix ? suffix : "");
} else if (is_namespace_blk(&ndns->dev)) {
struct nd_namespace_blk *nsblk;
@@ -294,7 +313,7 @@ static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk)
if (strcmp(res->name, label_id.id) != 0)
continue;
/*
- * Resources with unacknoweldged adjustments indicate a
+ * Resources with unacknowledged adjustments indicate a
* failure to update labels
*/
if (res->flags & DPA_RESOURCE_ADJUSTED)
@@ -510,19 +529,68 @@ static resource_size_t init_dpa_allocation(struct nd_label_id *label_id,
return rc ? n : 0;
}
-static bool space_valid(bool is_pmem, bool is_reserve,
- struct nd_label_id *label_id, struct resource *res)
+
+/**
+ * space_valid() - validate free dpa space against constraints
+ * @nd_region: hosting region of the free space
+ * @ndd: dimm device data for debug
+ * @label_id: namespace id to allocate space
+ * @prev: potential allocation that precedes free space
+ * @next: allocation that follows the given free space range
+ * @exist: first allocation with same id in the mapping
+ * @n: range that must satisfied for pmem allocations
+ * @valid: free space range to validate
+ *
+ * BLK-space is valid as long as it does not precede a PMEM
+ * allocation in a given region. PMEM-space must be contiguous
+ * and adjacent to an existing existing allocation (if one
+ * exists). If reserving PMEM any space is valid.
+ */
+static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd,
+ struct nd_label_id *label_id, struct resource *prev,
+ struct resource *next, struct resource *exist,
+ resource_size_t n, struct resource *valid)
{
- /*
- * For BLK-space any space is valid, for PMEM-space, it must be
- * contiguous with an existing allocation unless we are
- * reserving pmem.
- */
- if (is_reserve || !is_pmem)
- return true;
- if (!res || strcmp(res->name, label_id->id) == 0)
- return true;
- return false;
+ bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0;
+ bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
+
+ if (valid->start >= valid->end)
+ goto invalid;
+
+ if (is_reserve)
+ return;
+
+ if (!is_pmem) {
+ struct nd_mapping *nd_mapping = &nd_region->mapping[0];
+ struct nvdimm_bus *nvdimm_bus;
+ struct blk_alloc_info info = {
+ .nd_mapping = nd_mapping,
+ .available = nd_mapping->size,
+ .res = valid,
+ };
+
+ WARN_ON(!is_nd_blk(&nd_region->dev));
+ nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
+ device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy);
+ return;
+ }
+
+ /* allocation needs to be contiguous, so this is all or nothing */
+ if (resource_size(valid) < n)
+ goto invalid;
+
+ /* we've got all the space we need and no existing allocation */
+ if (!exist)
+ return;
+
+ /* allocation needs to be contiguous with the existing namespace */
+ if (valid->start == exist->end + 1
+ || valid->end == exist->start - 1)
+ return;
+
+ invalid:
+ /* truncate @valid size to 0 */
+ valid->end = valid->start - 1;
}
enum alloc_loc {
@@ -534,18 +602,24 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
resource_size_t n)
{
resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1;
- bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0;
bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+ struct resource *res, *exist = NULL, valid;
const resource_size_t to_allocate = n;
- struct resource *res;
int first;
+ for_each_dpa_resource(ndd, res)
+ if (strcmp(label_id->id, res->name) == 0)
+ exist = res;
+
+ valid.start = nd_mapping->start;
+ valid.end = mapping_end;
+ valid.name = "free space";
retry:
first = 0;
for_each_dpa_resource(ndd, res) {
- resource_size_t allocate, available = 0, free_start, free_end;
struct resource *next = res->sibling, *new_res = NULL;
+ resource_size_t allocate, available = 0;
enum alloc_loc loc = ALLOC_ERR;
const char *action;
int rc = 0;
@@ -558,32 +632,35 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
/* space at the beginning of the mapping */
if (!first++ && res->start > nd_mapping->start) {
- free_start = nd_mapping->start;
- available = res->start - free_start;
- if (space_valid(is_pmem, is_reserve, label_id, NULL))
+ valid.start = nd_mapping->start;
+ valid.end = res->start - 1;
+ space_valid(nd_region, ndd, label_id, NULL, next, exist,
+ to_allocate, &valid);
+ available = resource_size(&valid);
+ if (available)
loc = ALLOC_BEFORE;
}
/* space between allocations */
if (!loc && next) {
- free_start = res->start + resource_size(res);
- free_end = min(mapping_end, next->start - 1);
- if (space_valid(is_pmem, is_reserve, label_id, res)
- && free_start < free_end) {
- available = free_end + 1 - free_start;
+ valid.start = res->start + resource_size(res);
+ valid.end = min(mapping_end, next->start - 1);
+ space_valid(nd_region, ndd, label_id, res, next, exist,
+ to_allocate, &valid);
+ available = resource_size(&valid);
+ if (available)
loc = ALLOC_MID;
- }
}
/* space at the end of the mapping */
if (!loc && !next) {
- free_start = res->start + resource_size(res);
- free_end = mapping_end;
- if (space_valid(is_pmem, is_reserve, label_id, res)
- && free_start < free_end) {
- available = free_end + 1 - free_start;
+ valid.start = res->start + resource_size(res);
+ valid.end = mapping_end;
+ space_valid(nd_region, ndd, label_id, res, next, exist,
+ to_allocate, &valid);
+ available = resource_size(&valid);
+ if (available)
loc = ALLOC_AFTER;
- }
}
if (!loc || !available)
@@ -593,8 +670,6 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
case ALLOC_BEFORE:
if (strcmp(res->name, label_id->id) == 0) {
/* adjust current resource up */
- if (is_pmem && !is_reserve)
- return n;
rc = adjust_resource(res, res->start - allocate,
resource_size(res) + allocate);
action = "cur grow up";
@@ -604,8 +679,6 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
case ALLOC_MID:
if (strcmp(next->name, label_id->id) == 0) {
/* adjust next resource up */
- if (is_pmem && !is_reserve)
- return n;
rc = adjust_resource(next, next->start
- allocate, resource_size(next)
+ allocate);
@@ -629,12 +702,10 @@ static resource_size_t scan_allocate(struct nd_region *nd_region,
if (strcmp(action, "allocate") == 0) {
/* BLK allocate bottom up */
if (!is_pmem)
- free_start += available - allocate;
- else if (!is_reserve && free_start != nd_mapping->start)
- return n;
+ valid.start += available - allocate;
new_res = nvdimm_allocate_dpa(ndd, label_id,
- free_start, allocate);
+ valid.start, allocate);
if (!new_res)
rc = -EBUSY;
} else if (strcmp(action, "grow down") == 0) {
@@ -832,13 +903,45 @@ static int grow_dpa_allocation(struct nd_region *nd_region,
return 0;
}
-static void nd_namespace_pmem_set_size(struct nd_region *nd_region,
+static void nd_namespace_pmem_set_resource(struct nd_region *nd_region,
struct nd_namespace_pmem *nspm, resource_size_t size)
{
struct resource *res = &nspm->nsio.res;
+ resource_size_t offset = 0;
- res->start = nd_region->ndr_start;
- res->end = nd_region->ndr_start + size - 1;
+ if (size && !nspm->uuid) {
+ WARN_ON_ONCE(1);
+ size = 0;
+ }
+
+ if (size && nspm->uuid) {
+ struct nd_mapping *nd_mapping = &nd_region->mapping[0];
+ struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+ struct nd_label_id label_id;
+ struct resource *res;
+
+ if (!ndd) {
+ size = 0;
+ goto out;
+ }
+
+ nd_label_gen_id(&label_id, nspm->uuid, 0);
+
+ /* calculate a spa offset from the dpa allocation offset */
+ for_each_dpa_resource(ndd, res)
+ if (strcmp(res->name, label_id.id) == 0) {
+ offset = (res->start - nd_mapping->start)
+ * nd_region->ndr_mappings;
+ goto out;
+ }
+
+ WARN_ON_ONCE(1);
+ size = 0;
+ }
+
+ out:
+ res->start = nd_region->ndr_start + offset;
+ res->end = res->start + size - 1;
}
static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where)
@@ -929,7 +1032,7 @@ static ssize_t __size_store(struct device *dev, unsigned long long val)
if (is_namespace_pmem(dev)) {
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
- nd_namespace_pmem_set_size(nd_region, nspm,
+ nd_namespace_pmem_set_resource(nd_region, nspm,
val * nd_region->ndr_mappings);
} else if (is_namespace_blk(dev)) {
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
@@ -1031,22 +1134,27 @@ static ssize_t size_show(struct device *dev,
}
static DEVICE_ATTR(size, S_IRUGO, size_show, size_store);
-static ssize_t uuid_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static u8 *namespace_to_uuid(struct device *dev)
{
- u8 *uuid;
-
if (is_namespace_pmem(dev)) {
struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
- uuid = nspm->uuid;
+ return nspm->uuid;
} else if (is_namespace_blk(dev)) {
struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
- uuid = nsblk->uuid;
+ return nsblk->uuid;
} else
- return -ENXIO;
+ return ERR_PTR(-ENXIO);
+}
+static ssize_t uuid_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ u8 *uuid = namespace_to_uuid(dev);
+
+ if (IS_ERR(uuid))
+ return PTR_ERR(uuid);
if (uuid)
return sprintf(buf, "%pUb\n", uuid);
return sprintf(buf, "\n");
@@ -1089,7 +1197,7 @@ static int namespace_update_uuid(struct nd_region *nd_region,
*
* FIXME: can we delete uuid with zero dpa allocated?
*/
- if (nd_mapping->labels)
+ if (list_empty(&nd_mapping->labels))
return -EBUSY;
}
@@ -1491,14 +1599,19 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
- struct nd_namespace_label *nd_label;
+ struct nd_label_ent *label_ent;
bool found_uuid = false;
- int l;
- for_each_label(l, nd_label, nd_mapping->labels) {
- u64 isetcookie = __le64_to_cpu(nd_label->isetcookie);
- u16 position = __le16_to_cpu(nd_label->position);
- u16 nlabel = __le16_to_cpu(nd_label->nlabel);
+ list_for_each_entry(label_ent, &nd_mapping->labels, list) {
+ struct nd_namespace_label *nd_label = label_ent->label;
+ u16 position, nlabel;
+ u64 isetcookie;
+
+ if (!nd_label)
+ continue;
+ isetcookie = __le64_to_cpu(nd_label->isetcookie);
+ position = __le16_to_cpu(nd_label->position);
+ nlabel = __le16_to_cpu(nd_label->nlabel);
if (isetcookie != cookie)
continue;
@@ -1528,7 +1641,6 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
{
- struct nd_namespace_label *select = NULL;
int i;
if (!pmem_id)
@@ -1536,90 +1648,106 @@ static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
- struct nd_namespace_label *nd_label;
+ struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+ struct nd_namespace_label *nd_label = NULL;
u64 hw_start, hw_end, pmem_start, pmem_end;
- int l;
+ struct nd_label_ent *label_ent;
- for_each_label(l, nd_label, nd_mapping->labels)
+ WARN_ON(!mutex_is_locked(&nd_mapping->lock));
+ list_for_each_entry(label_ent, &nd_mapping->labels, list) {
+ nd_label = label_ent->label;
+ if (!nd_label)
+ continue;
if (memcmp(nd_label->uuid, pmem_id, NSLABEL_UUID_LEN) == 0)
break;
+ nd_label = NULL;
+ }
if (!nd_label) {
WARN_ON(1);
return -EINVAL;
}
- select = nd_label;
/*
* Check that this label is compliant with the dpa
* range published in NFIT
*/
hw_start = nd_mapping->start;
hw_end = hw_start + nd_mapping->size;
- pmem_start = __le64_to_cpu(select->dpa);
- pmem_end = pmem_start + __le64_to_cpu(select->rawsize);
- if (pmem_start == hw_start && pmem_end <= hw_end)
+ pmem_start = __le64_to_cpu(nd_label->dpa);
+ pmem_end = pmem_start + __le64_to_cpu(nd_label->rawsize);
+ if (pmem_start >= hw_start && pmem_start < hw_end
+ && pmem_end <= hw_end && pmem_end > hw_start)
/* pass */;
- else
+ else {
+ dev_dbg(&nd_region->dev, "%s invalid label for %pUb\n",
+ dev_name(ndd->dev), nd_label->uuid);
return -EINVAL;
+ }
- nd_mapping->labels[0] = select;
- nd_mapping->labels[1] = NULL;
+ /* move recently validated label to the front of the list */
+ list_move(&label_ent->list, &nd_mapping->labels);
}
return 0;
}
/**
- * find_pmem_label_set - validate interleave set labelling, retrieve label0
+ * create_namespace_pmem - validate interleave set labelling, retrieve label0
* @nd_region: region with mappings to validate
+ * @nspm: target namespace to create
+ * @nd_label: target pmem namespace label to evaluate
*/
-static int find_pmem_label_set(struct nd_region *nd_region,
- struct nd_namespace_pmem *nspm)
+struct device *create_namespace_pmem(struct nd_region *nd_region,
+ struct nd_namespace_label *nd_label)
{
u64 cookie = nd_region_interleave_set_cookie(nd_region);
- struct nd_namespace_label *nd_label;
- u8 select_id[NSLABEL_UUID_LEN];
+ struct nd_label_ent *label_ent;
+ struct nd_namespace_pmem *nspm;
+ struct nd_mapping *nd_mapping;
resource_size_t size = 0;
- u8 *pmem_id = NULL;
- int rc = -ENODEV, l;
+ struct resource *res;
+ struct device *dev;
+ int rc = 0;
u16 i;
- if (cookie == 0)
- return -ENXIO;
+ if (cookie == 0) {
+ dev_dbg(&nd_region->dev, "invalid interleave-set-cookie\n");
+ return ERR_PTR(-ENXIO);
+ }
- /*
- * Find a complete set of labels by uuid. By definition we can start
- * with any mapping as the reference label
- */
- for_each_label(l, nd_label, nd_region->mapping[0].labels) {
- u64 isetcookie = __le64_to_cpu(nd_label->isetcookie);
+ if (__le64_to_cpu(nd_label->isetcookie) != cookie) {
+ dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n",
+ nd_label->uuid);
+ return ERR_PTR(-EAGAIN);
+ }
- if (isetcookie != cookie)
- continue;
+ nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
+ if (!nspm)
+ return ERR_PTR(-ENOMEM);
- for (i = 0; nd_region->ndr_mappings; i++)
- if (!has_uuid_at_pos(nd_region, nd_label->uuid,
- cookie, i))
- break;
- if (i < nd_region->ndr_mappings) {
- /*
- * Give up if we don't find an instance of a
- * uuid at each position (from 0 to
- * nd_region->ndr_mappings - 1), or if we find a
- * dimm with two instances of the same uuid.
- */
- rc = -EINVAL;
- goto err;
- } else if (pmem_id) {
- /*
- * If there is more than one valid uuid set, we
- * need userspace to clean this up.
- */
- rc = -EBUSY;
- goto err;
- }
- memcpy(select_id, nd_label->uuid, NSLABEL_UUID_LEN);
- pmem_id = select_id;
+ nspm->id = -1;
+ dev = &nspm->nsio.common.dev;
+ dev->type = &namespace_pmem_device_type;
+ dev->parent = &nd_region->dev;
+ res = &nspm->nsio.res;
+ res->name = dev_name(&nd_region->dev);
+ res->flags = IORESOURCE_MEM;
+
+ for (i = 0; i < nd_region->ndr_mappings; i++)
+ if (!has_uuid_at_pos(nd_region, nd_label->uuid, cookie, i))
+ break;
+ if (i < nd_region->ndr_mappings) {
+ struct nvdimm_drvdata *ndd = to_ndd(&nd_region->mapping[i]);
+
+ /*
+ * Give up if we don't find an instance of a uuid at each
+ * position (from 0 to nd_region->ndr_mappings - 1), or if we
+ * find a dimm with two instances of the same uuid.
+ */
+ dev_err(&nd_region->dev, "%s missing label for %pUb\n",
+ dev_name(ndd->dev), nd_label->uuid);
+ rc = -EINVAL;
+ goto err;
}
/*
@@ -1630,14 +1758,23 @@ static int find_pmem_label_set(struct nd_region *nd_region,
* the dimm being enabled (i.e. nd_label_reserve_dpa()
* succeeded).
*/
- rc = select_pmem_id(nd_region, pmem_id);
+ rc = select_pmem_id(nd_region, nd_label->uuid);
if (rc)
goto err;
/* Calculate total size and populate namespace properties from label0 */
for (i = 0; i < nd_region->ndr_mappings; i++) {
- struct nd_mapping *nd_mapping = &nd_region->mapping[i];
- struct nd_namespace_label *label0 = nd_mapping->labels[0];
+ struct nd_namespace_label *label0;
+
+ nd_mapping = &nd_region->mapping[i];
+ label_ent = list_first_entry_or_null(&nd_mapping->labels,
+ typeof(*label_ent), list);
+ label0 = label_ent ? label_ent->label : 0;
+
+ if (!label0) {
+ WARN_ON(1);
+ continue;
+ }
size += __le64_to_cpu(label0->rawsize);
if (__le16_to_cpu(label0->position) != 0)
@@ -1654,10 +1791,11 @@ static int find_pmem_label_set(struct nd_region *nd_region,
goto err;
}
- nd_namespace_pmem_set_size(nd_region, nspm, size);
+ nd_namespace_pmem_set_resource(nd_region, nspm, size);
- return 0;
+ return dev;
err:
+ namespace_pmem_release(dev);
switch (rc) {
case -EINVAL:
dev_dbg(&nd_region->dev, "%s: invalid label(s)\n", __func__);
@@ -1670,55 +1808,7 @@ static int find_pmem_label_set(struct nd_region *nd_region,
__func__, rc);
break;
}
- return rc;
-}
-
-static struct device **create_namespace_pmem(struct nd_region *nd_region)
-{
- struct nd_namespace_pmem *nspm;
- struct device *dev, **devs;
- struct resource *res;
- int rc;
-
- nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
- if (!nspm)
- return NULL;
-
- dev = &nspm->nsio.common.dev;
- dev->type = &namespace_pmem_device_type;
- dev->parent = &nd_region->dev;
- res = &nspm->nsio.res;
- res->name = dev_name(&nd_region->dev);
- res->flags = IORESOURCE_MEM;
- rc = find_pmem_label_set(nd_region, nspm);
- if (rc == -ENODEV) {
- int i;
-
- /* Pass, try to permit namespace creation... */
- for (i = 0; i < nd_region->ndr_mappings; i++) {
- struct nd_mapping *nd_mapping = &nd_region->mapping[i];
-
- kfree(nd_mapping->labels);
- nd_mapping->labels = NULL;
- }
-
- /* Publish a zero-sized namespace for userspace to configure. */
- nd_namespace_pmem_set_size(nd_region, nspm, 0);
-
- rc = 0;
- } else if (rc)
- goto err;
-
- devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL);
- if (!devs)
- goto err;
-
- devs[0] = dev;
- return devs;
-
- err:
- namespace_pmem_release(&nspm->nsio.common.dev);
- return NULL;
+ return ERR_PTR(rc);
}
struct resource *nsblk_add_resource(struct nd_region *nd_region,
@@ -1770,16 +1860,58 @@ static struct device *nd_namespace_blk_create(struct nd_region *nd_region)
return &nsblk->common.dev;
}
-void nd_region_create_blk_seed(struct nd_region *nd_region)
+static struct device *nd_namespace_pmem_create(struct nd_region *nd_region)
+{
+ struct nd_namespace_pmem *nspm;
+ struct resource *res;
+ struct device *dev;
+
+ if (!is_nd_pmem(&nd_region->dev))
+ return NULL;
+
+ nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
+ if (!nspm)
+ return NULL;
+
+ dev = &nspm->nsio.common.dev;
+ dev->type = &namespace_pmem_device_type;
+ dev->parent = &nd_region->dev;
+ res = &nspm->nsio.res;
+ res->name = dev_name(&nd_region->dev);
+ res->flags = IORESOURCE_MEM;
+
+ nspm->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL);
+ if (nspm->id < 0) {
+ kfree(nspm);
+ return NULL;
+ }
+ dev_set_name(dev, "namespace%d.%d", nd_region->id, nspm->id);
+ dev->parent = &nd_region->dev;
+ dev->groups = nd_namespace_attribute_groups;
+ nd_namespace_pmem_set_resource(nd_region, nspm, 0);
+
+ return dev;
+}
+
+void nd_region_create_ns_seed(struct nd_region *nd_region)
{
WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev));
- nd_region->ns_seed = nd_namespace_blk_create(nd_region);
+
+ if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO)
+ return;
+
+ if (is_nd_blk(&nd_region->dev))
+ nd_region->ns_seed = nd_namespace_blk_create(nd_region);
+ else
+ nd_region->ns_seed = nd_namespace_pmem_create(nd_region);
+
/*
* Seed creation failures are not fatal, provisioning is simply
* disabled until memory becomes available
*/
if (!nd_region->ns_seed)
- dev_err(&nd_region->dev, "failed to create blk namespace\n");
+ dev_err(&nd_region->dev, "failed to create %s namespace\n",
+ is_nd_blk(&nd_region->dev) ? "blk" : "pmem");
else
nd_device_register(nd_region->ns_seed);
}
@@ -1820,43 +1952,137 @@ void nd_region_create_btt_seed(struct nd_region *nd_region)
dev_err(&nd_region->dev, "failed to create btt namespace\n");
}
-static struct device **create_namespace_blk(struct nd_region *nd_region)
+static int add_namespace_resource(struct nd_region *nd_region,
+ struct nd_namespace_label *nd_label, struct device **devs,
+ int count)
{
struct nd_mapping *nd_mapping = &nd_region->mapping[0];
- struct nd_namespace_label *nd_label;
- struct device *dev, **devs = NULL;
+ struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+ int i;
+
+ for (i = 0; i < count; i++) {
+ u8 *uuid = namespace_to_uuid(devs[i]);
+ struct resource *res;
+
+ if (IS_ERR_OR_NULL(uuid)) {
+ WARN_ON(1);
+ continue;
+ }
+
+ if (memcmp(uuid, nd_label->uuid, NSLABEL_UUID_LEN) != 0)
+ continue;
+ if (is_namespace_blk(devs[i])) {
+ res = nsblk_add_resource(nd_region, ndd,
+ to_nd_namespace_blk(devs[i]),
+ __le64_to_cpu(nd_label->dpa));
+ if (!res)
+ return -ENXIO;
+ nd_dbg_dpa(nd_region, ndd, res, "%d assign\n", count);
+ } else {
+ dev_err(&nd_region->dev,
+ "error: conflicting extents for uuid: %pUb\n",
+ nd_label->uuid);
+ return -ENXIO;
+ }
+ break;
+ }
+
+ return i;
+}
+
+struct device *create_namespace_blk(struct nd_region *nd_region,
+ struct nd_namespace_label *nd_label, int count)
+{
+
+ struct nd_mapping *nd_mapping = &nd_region->mapping[0];
+ struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nd_namespace_blk *nsblk;
- struct nvdimm_drvdata *ndd;
- int i, l, count = 0;
+ char *name[NSLABEL_NAME_LEN];
+ struct device *dev = NULL;
struct resource *res;
- if (nd_region->ndr_mappings == 0)
- return NULL;
+ nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
+ if (!nsblk)
+ return ERR_PTR(-ENOMEM);
+ dev = &nsblk->common.dev;
+ dev->type = &namespace_blk_device_type;
+ dev->parent = &nd_region->dev;
+ nsblk->id = -1;
+ nsblk->lbasize = __le64_to_cpu(nd_label->lbasize);
+ nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN,
+ GFP_KERNEL);
+ if (!nsblk->uuid)
+ goto blk_err;
+ memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
+ if (name[0])
+ nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN,
+ GFP_KERNEL);
+ res = nsblk_add_resource(nd_region, ndd, nsblk,
+ __le64_to_cpu(nd_label->dpa));
+ if (!res)
+ goto blk_err;
+ nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count);
+ return dev;
+ blk_err:
+ namespace_blk_release(dev);
+ return ERR_PTR(-ENXIO);
+}
+
+static int cmp_dpa(const void *a, const void *b)
+{
+ const struct device *dev_a = *(const struct device **) a;
+ const struct device *dev_b = *(const struct device **) b;
+ struct nd_namespace_blk *nsblk_a, *nsblk_b;
+ struct nd_namespace_pmem *nspm_a, *nspm_b;
+
+ if (is_namespace_io(dev_a))
+ return 0;
+
+ if (is_namespace_blk(dev_a)) {
+ nsblk_a = to_nd_namespace_blk(dev_a);
+ nsblk_b = to_nd_namespace_blk(dev_b);
+
+ return memcmp(&nsblk_a->res[0]->start, &nsblk_b->res[0]->start,
+ sizeof(resource_size_t));
+ }
+
+ nspm_a = to_nd_namespace_pmem(dev_a);
+ nspm_b = to_nd_namespace_pmem(dev_b);
+
+ return memcmp(&nspm_a->nsio.res.start, &nspm_b->nsio.res.start,
+ sizeof(resource_size_t));
+}
- ndd = to_ndd(nd_mapping);
- for_each_label(l, nd_label, nd_mapping->labels) {
- u32 flags = __le32_to_cpu(nd_label->flags);
- char *name[NSLABEL_NAME_LEN];
+static struct device **scan_labels(struct nd_region *nd_region)
+{
+ int i, count = 0;
+ struct device *dev, **devs = NULL;
+ struct nd_label_ent *label_ent, *e;
+ struct nd_mapping *nd_mapping = &nd_region->mapping[0];
+ resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1;
+
+ /* "safe" because create_namespace_pmem() might list_move() label_ent */
+ list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
+ struct nd_namespace_label *nd_label = label_ent->label;
struct device **__devs;
+ u32 flags;
- if (flags & NSLABEL_FLAG_LOCAL)
- /* pass */;
+ if (!nd_label)
+ continue;
+ flags = __le32_to_cpu(nd_label->flags);
+ if (is_nd_blk(&nd_region->dev)
+ == !!(flags & NSLABEL_FLAG_LOCAL))
+ /* pass, region matches label type */;
else
continue;
- for (i = 0; i < count; i++) {
- nsblk = to_nd_namespace_blk(devs[i]);
- if (memcmp(nsblk->uuid, nd_label->uuid,
- NSLABEL_UUID_LEN) == 0) {
- res = nsblk_add_resource(nd_region, ndd, nsblk,
- __le64_to_cpu(nd_label->dpa));
- if (!res)
- goto err;
- nd_dbg_dpa(nd_region, ndd, res, "%s assign\n",
- dev_name(&nsblk->common.dev));
- break;
- }
- }
+ /* skip labels that describe extents outside of the region */
+ if (nd_label->dpa < nd_mapping->start || nd_label->dpa > map_end)
+ continue;
+
+ i = add_namespace_resource(nd_region, nd_label, devs, count);
+ if (i < 0)
+ goto err;
if (i < count)
continue;
__devs = kcalloc(count + 2, sizeof(dev), GFP_KERNEL);
@@ -1866,67 +2092,126 @@ static struct device **create_namespace_blk(struct nd_region *nd_region)
kfree(devs);
devs = __devs;
- nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
- if (!nsblk)
- goto err;
- dev = &nsblk->common.dev;
- dev->type = &namespace_blk_device_type;
- dev->parent = &nd_region->dev;
- dev_set_name(dev, "namespace%d.%d", nd_region->id, count);
- devs[count++] = dev;
- nsblk->id = -1;
- nsblk->lbasize = __le64_to_cpu(nd_label->lbasize);
- nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN,
- GFP_KERNEL);
- if (!nsblk->uuid)
- goto err;
- memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
- if (name[0])
- nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN,
- GFP_KERNEL);
- res = nsblk_add_resource(nd_region, ndd, nsblk,
- __le64_to_cpu(nd_label->dpa));
- if (!res)
- goto err;
- nd_dbg_dpa(nd_region, ndd, res, "%s assign\n",
- dev_name(&nsblk->common.dev));
+ if (is_nd_blk(&nd_region->dev)) {
+ dev = create_namespace_blk(nd_region, nd_label, count);
+ if (IS_ERR(dev))
+ goto err;
+ devs[count++] = dev;
+ } else {
+ dev = create_namespace_pmem(nd_region, nd_label);
+ if (IS_ERR(dev)) {
+ switch (PTR_ERR(dev)) {
+ case -EAGAIN:
+ /* skip invalid labels */
+ continue;
+ case -ENODEV:
+ /* fallthrough to seed creation */
+ break;
+ default:
+ goto err;
+ }
+ } else
+ devs[count++] = dev;
+ }
}
- dev_dbg(&nd_region->dev, "%s: discovered %d blk namespace%s\n",
- __func__, count, count == 1 ? "" : "s");
+ dev_dbg(&nd_region->dev, "%s: discovered %d %s namespace%s\n",
+ __func__, count, is_nd_blk(&nd_region->dev)
+ ? "blk" : "pmem", count == 1 ? "" : "s");
if (count == 0) {
/* Publish a zero-sized namespace for userspace to configure. */
- for (i = 0; i < nd_region->ndr_mappings; i++) {
- struct nd_mapping *nd_mapping = &nd_region->mapping[i];
-
- kfree(nd_mapping->labels);
- nd_mapping->labels = NULL;
- }
+ nd_mapping_free_labels(nd_mapping);
devs = kcalloc(2, sizeof(dev), GFP_KERNEL);
if (!devs)
goto err;
- nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
- if (!nsblk)
- goto err;
- dev = &nsblk->common.dev;
- dev->type = &namespace_blk_device_type;
+ if (is_nd_blk(&nd_region->dev)) {
+ struct nd_namespace_blk *nsblk;
+
+ nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL);
+ if (!nsblk)
+ goto err;
+ dev = &nsblk->common.dev;
+ dev->type = &namespace_blk_device_type;
+ } else {
+ struct nd_namespace_pmem *nspm;
+
+ nspm = kzalloc(sizeof(*nspm), GFP_KERNEL);
+ if (!nspm)
+ goto err;
+ dev = &nspm->nsio.common.dev;
+ dev->type = &namespace_pmem_device_type;
+ nd_namespace_pmem_set_resource(nd_region, nspm, 0);
+ }
dev->parent = &nd_region->dev;
devs[count++] = dev;
+ } else if (is_nd_pmem(&nd_region->dev)) {
+ /* clean unselected labels */
+ for (i = 0; i < nd_region->ndr_mappings; i++) {
+ struct list_head *l, *e;
+ LIST_HEAD(list);
+ int j;
+
+ nd_mapping = &nd_region->mapping[i];
+ if (list_empty(&nd_mapping->labels)) {
+ WARN_ON(1);
+ continue;
+ }
+
+ j = count;
+ list_for_each_safe(l, e, &nd_mapping->labels) {
+ if (!j--)
+ break;
+ list_move_tail(l, &list);
+ }
+ nd_mapping_free_labels(nd_mapping);
+ list_splice_init(&list, &nd_mapping->labels);
+ }
}
+ if (count > 1)
+ sort(devs, count, sizeof(struct device *), cmp_dpa, NULL);
+
return devs;
-err:
- for (i = 0; i < count; i++) {
- nsblk = to_nd_namespace_blk(devs[i]);
- namespace_blk_release(&nsblk->common.dev);
- }
+ err:
+ for (i = 0; devs[i]; i++)
+ if (is_nd_blk(&nd_region->dev))
+ namespace_blk_release(devs[i]);
+ else
+ namespace_pmem_release(devs[i]);
kfree(devs);
return NULL;
}
+static struct device **create_namespaces(struct nd_region *nd_region)
+{
+ struct nd_mapping *nd_mapping = &nd_region->mapping[0];
+ struct device **devs;
+ int i;
+
+ if (nd_region->ndr_mappings == 0)
+ return NULL;
+
+ /* lock down all mappings while we scan labels */
+ for (i = 0; i < nd_region->ndr_mappings; i++) {
+ nd_mapping = &nd_region->mapping[i];
+ mutex_lock_nested(&nd_mapping->lock, i);
+ }
+
+ devs = scan_labels(nd_region);
+
+ for (i = 0; i < nd_region->ndr_mappings; i++) {
+ int reverse = nd_region->ndr_mappings - 1 - i;
+
+ nd_mapping = &nd_region->mapping[reverse];
+ mutex_unlock(&nd_mapping->lock);
+ }
+
+ return devs;
+}
+
static int init_active_labels(struct nd_region *nd_region)
{
int i;
@@ -1935,6 +2220,7 @@ static int init_active_labels(struct nd_region *nd_region)
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct nvdimm *nvdimm = nd_mapping->nvdimm;
+ struct nd_label_ent *label_ent;
int count, j;
/*
@@ -1956,16 +2242,27 @@ static int init_active_labels(struct nd_region *nd_region)
dev_dbg(ndd->dev, "%s: %d\n", __func__, count);
if (!count)
continue;
- nd_mapping->labels = kcalloc(count + 1, sizeof(void *),
- GFP_KERNEL);
- if (!nd_mapping->labels)
- return -ENOMEM;
for (j = 0; j < count; j++) {
struct nd_namespace_label *label;
+ label_ent = kzalloc(sizeof(*label_ent), GFP_KERNEL);
+ if (!label_ent)
+ break;
label = nd_label_active(ndd, j);
- nd_mapping->labels[j] = label;
+ label_ent->label = label;
+
+ mutex_lock(&nd_mapping->lock);
+ list_add_tail(&label_ent->list, &nd_mapping->labels);
+ mutex_unlock(&nd_mapping->lock);
}
+
+ if (j >= count)
+ continue;
+
+ mutex_lock(&nd_mapping->lock);
+ nd_mapping_free_labels(nd_mapping);
+ mutex_unlock(&nd_mapping->lock);
+ return -ENOMEM;
}
return 0;
@@ -1990,10 +2287,8 @@ int nd_region_register_namespaces(struct nd_region *nd_region, int *err)
devs = create_namespace_io(nd_region);
break;
case ND_DEVICE_NAMESPACE_PMEM:
- devs = create_namespace_pmem(nd_region);
- break;
case ND_DEVICE_NAMESPACE_BLK:
- devs = create_namespace_blk(nd_region);
+ devs = create_namespaces(nd_region);
break;
default:
break;
@@ -2014,6 +2309,13 @@ int nd_region_register_namespaces(struct nd_region *nd_region, int *err)
id = ida_simple_get(&nd_region->ns_ida, 0, 0,
GFP_KERNEL);
nsblk->id = id;
+ } else if (type == ND_DEVICE_NAMESPACE_PMEM) {
+ struct nd_namespace_pmem *nspm;
+
+ nspm = to_nd_namespace_pmem(dev);
+ id = ida_simple_get(&nd_region->ns_ida, 0, 0,
+ GFP_KERNEL);
+ nspm->id = id;
} else
id = i;
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index 38ce6bbbc170..8623e57c2ce3 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -44,6 +44,23 @@ struct nvdimm {
struct resource *flush_wpq;
};
+/**
+ * struct blk_alloc_info - tracking info for BLK dpa scanning
+ * @nd_mapping: blk region mapping boundaries
+ * @available: decremented in alias_dpa_busy as aliased PMEM is scanned
+ * @busy: decremented in blk_dpa_busy to account for ranges already
+ * handled by alias_dpa_busy
+ * @res: alias_dpa_busy interprets this a free space range that needs to
+ * be truncated to the valid BLK allocation starting DPA, blk_dpa_busy
+ * treats it as a busy range that needs the aliased PMEM ranges
+ * truncated.
+ */
+struct blk_alloc_info {
+ struct nd_mapping *nd_mapping;
+ resource_size_t available, busy;
+ struct resource *res;
+};
+
bool is_nvdimm(struct device *dev);
bool is_nd_pmem(struct device *dev);
bool is_nd_blk(struct device *dev);
@@ -54,7 +71,7 @@ void nvdimm_devs_exit(void);
void nd_region_devs_exit(void);
void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus, struct device *dev);
struct nd_region;
-void nd_region_create_blk_seed(struct nd_region *nd_region);
+void nd_region_create_ns_seed(struct nd_region *nd_region);
void nd_region_create_btt_seed(struct nd_region *nd_region);
void nd_region_create_pfn_seed(struct nd_region *nd_region);
void nd_region_create_dax_seed(struct nd_region *nd_region);
@@ -73,13 +90,14 @@ bool nd_is_uuid_unique(struct device *dev, u8 *uuid);
struct nd_region;
struct nvdimm_drvdata;
struct nd_mapping;
+void nd_mapping_free_labels(struct nd_mapping *nd_mapping);
resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
struct nd_mapping *nd_mapping, resource_size_t *overlap);
-resource_size_t nd_blk_available_dpa(struct nd_mapping *nd_mapping);
+resource_size_t nd_blk_available_dpa(struct nd_region *nd_region);
resource_size_t nd_region_available_dpa(struct nd_region *nd_region);
resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd,
struct nd_label_id *label_id);
-struct nd_mapping;
+int alias_dpa_busy(struct device *dev, void *data);
struct resource *nsblk_add_resource(struct nd_region *nd_region,
struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk,
resource_size_t start);
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 0b78a8211f4a..d3b2fca8deec 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -101,9 +101,6 @@ static inline struct nd_namespace_index *to_next_namespace_index(
(unsigned long long) (res ? resource_size(res) : 0), \
(unsigned long long) (res ? res->start : 0), ##arg)
-#define for_each_label(l, label, labels) \
- for (l = 0; (label = labels ? labels[l] : NULL); l++)
-
#define for_each_dpa_resource(ndd, res) \
for (res = (ndd)->dpa.child; res; res = res->sibling)
@@ -116,6 +113,31 @@ struct nd_percpu_lane {
spinlock_t lock;
};
+struct nd_label_ent {
+ struct list_head list;
+ struct nd_namespace_label *label;
+};
+
+enum nd_mapping_lock_class {
+ ND_MAPPING_CLASS0,
+ ND_MAPPING_UUID_SCAN,
+};
+
+struct nd_mapping {
+ struct nvdimm *nvdimm;
+ u64 start;
+ u64 size;
+ struct list_head labels;
+ struct mutex lock;
+ /*
+ * @ndd is for private use at region enable / disable time for
+ * get_ndd() + put_ndd(), all other nd_mapping to ndd
+ * conversions use to_ndd() which respects enabled state of the
+ * nvdimm.
+ */
+ struct nvdimm_drvdata *ndd;
+};
+
struct nd_region {
struct device dev;
struct ida ns_ida;
@@ -209,6 +231,7 @@ void nvdimm_exit(void);
void nd_region_exit(void);
struct nvdimm;
struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
+int nvdimm_check_config_data(struct device *dev);
int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 571a6c7ee2fc..42b3a8217073 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -66,13 +66,32 @@ static void pmem_clear_poison(struct pmem_device *pmem, phys_addr_t offset,
invalidate_pmem(pmem->virt_addr + offset, len);
}
+static void write_pmem(void *pmem_addr, struct page *page,
+ unsigned int off, unsigned int len)
+{
+ void *mem = kmap_atomic(page);
+
+ memcpy_to_pmem(pmem_addr, mem + off, len);
+ kunmap_atomic(mem);
+}
+
+static int read_pmem(struct page *page, unsigned int off,
+ void *pmem_addr, unsigned int len)
+{
+ int rc;
+ void *mem = kmap_atomic(page);
+
+ rc = memcpy_from_pmem(mem + off, pmem_addr, len);
+ kunmap_atomic(mem);
+ return rc;
+}
+
static int pmem_do_bvec(struct pmem_device *pmem, struct page *page,
unsigned int len, unsigned int off, bool is_write,
sector_t sector)
{
int rc = 0;
bool bad_pmem = false;
- void *mem = kmap_atomic(page);
phys_addr_t pmem_off = sector * 512 + pmem->data_offset;
void *pmem_addr = pmem->virt_addr + pmem_off;
@@ -83,7 +102,7 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page,
if (unlikely(bad_pmem))
rc = -EIO;
else {
- rc = memcpy_from_pmem(mem + off, pmem_addr, len);
+ rc = read_pmem(page, off, pmem_addr, len);
flush_dcache_page(page);
}
} else {
@@ -102,14 +121,13 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page,
* after clear poison.
*/
flush_dcache_page(page);
- memcpy_to_pmem(pmem_addr, mem + off, len);
+ write_pmem(pmem_addr, page, off, len);
if (unlikely(bad_pmem)) {
pmem_clear_poison(pmem, pmem_off, len);
- memcpy_to_pmem(pmem_addr, mem + off, len);
+ write_pmem(pmem_addr, page, off, len);
}
}
- kunmap_atomic(mem);
return rc;
}
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index f9d58c2b5341..6af5e629140c 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -313,9 +313,8 @@ resource_size_t nd_region_available_dpa(struct nd_region *nd_region)
blk_max_overlap = overlap;
goto retry;
}
- } else if (is_nd_blk(&nd_region->dev)) {
- available += nd_blk_available_dpa(nd_mapping);
- }
+ } else if (is_nd_blk(&nd_region->dev))
+ available += nd_blk_available_dpa(nd_region);
}
return available;
@@ -506,6 +505,17 @@ u64 nd_region_interleave_set_cookie(struct nd_region *nd_region)
return 0;
}
+void nd_mapping_free_labels(struct nd_mapping *nd_mapping)
+{
+ struct nd_label_ent *label_ent, *e;
+
+ WARN_ON(!mutex_is_locked(&nd_mapping->lock));
+ list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) {
+ list_del(&label_ent->list);
+ kfree(label_ent);
+ }
+}
+
/*
* Upon successful probe/remove, take/release a reference on the
* associated interleave set (if present), and plant new btt + namespace
@@ -526,8 +536,10 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
struct nvdimm_drvdata *ndd = nd_mapping->ndd;
struct nvdimm *nvdimm = nd_mapping->nvdimm;
- kfree(nd_mapping->labels);
- nd_mapping->labels = NULL;
+ mutex_lock(&nd_mapping->lock);
+ nd_mapping_free_labels(nd_mapping);
+ mutex_unlock(&nd_mapping->lock);
+
put_ndd(ndd);
nd_mapping->ndd = NULL;
if (ndd)
@@ -537,11 +549,12 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
if (is_nd_pmem(dev))
return;
}
- if (dev->parent && is_nd_blk(dev->parent) && probe) {
+ if (dev->parent && (is_nd_blk(dev->parent) || is_nd_pmem(dev->parent))
+ && probe) {
nd_region = to_nd_region(dev->parent);
nvdimm_bus_lock(dev);
if (nd_region->ns_seed == dev)
- nd_region_create_blk_seed(nd_region);
+ nd_region_create_ns_seed(nd_region);
nvdimm_bus_unlock(dev);
}
if (is_nd_btt(dev) && probe) {
@@ -551,23 +564,30 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus,
nvdimm_bus_lock(dev);
if (nd_region->btt_seed == dev)
nd_region_create_btt_seed(nd_region);
- if (nd_region->ns_seed == &nd_btt->ndns->dev &&
- is_nd_blk(dev->parent))
- nd_region_create_blk_seed(nd_region);
+ if (nd_region->ns_seed == &nd_btt->ndns->dev)
+ nd_region_create_ns_seed(nd_region);
nvdimm_bus_unlock(dev);
}
if (is_nd_pfn(dev) && probe) {
+ struct nd_pfn *nd_pfn = to_nd_pfn(dev);
+
nd_region = to_nd_region(dev->parent);
nvdimm_bus_lock(dev);
if (nd_region->pfn_seed == dev)
nd_region_create_pfn_seed(nd_region);
+ if (nd_region->ns_seed == &nd_pfn->ndns->dev)
+ nd_region_create_ns_seed(nd_region);
nvdimm_bus_unlock(dev);
}
if (is_nd_dax(dev) && probe) {
+ struct nd_dax *nd_dax = to_nd_dax(dev);
+
nd_region = to_nd_region(dev->parent);
nvdimm_bus_lock(dev);
if (nd_region->dax_seed == dev)
nd_region_create_dax_seed(nd_region);
+ if (nd_region->ns_seed == &nd_dax->nd_pfn.ndns->dev)
+ nd_region_create_ns_seed(nd_region);
nvdimm_bus_unlock(dev);
}
}
@@ -774,10 +794,10 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
int ro = 0;
for (i = 0; i < ndr_desc->num_mappings; i++) {
- struct nd_mapping *nd_mapping = &ndr_desc->nd_mapping[i];
- struct nvdimm *nvdimm = nd_mapping->nvdimm;
+ struct nd_mapping_desc *mapping = &ndr_desc->mapping[i];
+ struct nvdimm *nvdimm = mapping->nvdimm;
- if ((nd_mapping->start | nd_mapping->size) % SZ_4K) {
+ if ((mapping->start | mapping->size) % SZ_4K) {
dev_err(&nvdimm_bus->dev, "%s: %s mapping%d is not 4K aligned\n",
caller, dev_name(&nvdimm->dev), i);
@@ -828,11 +848,15 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
ndl->count = 0;
}
- memcpy(nd_region->mapping, ndr_desc->nd_mapping,
- sizeof(struct nd_mapping) * ndr_desc->num_mappings);
for (i = 0; i < ndr_desc->num_mappings; i++) {
- struct nd_mapping *nd_mapping = &ndr_desc->nd_mapping[i];
- struct nvdimm *nvdimm = nd_mapping->nvdimm;
+ struct nd_mapping_desc *mapping = &ndr_desc->mapping[i];
+ struct nvdimm *nvdimm = mapping->nvdimm;
+
+ nd_region->mapping[i].nvdimm = nvdimm;
+ nd_region->mapping[i].start = mapping->start;
+ nd_region->mapping[i].size = mapping->size;
+ INIT_LIST_HEAD(&nd_region->mapping[i].labels);
+ mutex_init(&nd_region->mapping[i].lock);
get_device(&nvdimm->dev);
}