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-rw-r--r--drivers/nvdimm/Kconfig1
-rw-r--r--drivers/nvdimm/btt_devs.c2
-rw-r--r--drivers/nvdimm/bus.c122
-rw-r--r--drivers/nvdimm/claim.c37
-rw-r--r--drivers/nvdimm/core.c51
-rw-r--r--drivers/nvdimm/dax_devs.c2
-rw-r--r--drivers/nvdimm/dimm.c2
-rw-r--r--drivers/nvdimm/dimm_devs.c19
-rw-r--r--drivers/nvdimm/namespace_devs.c17
-rw-r--r--drivers/nvdimm/nd-core.h1
-rw-r--r--drivers/nvdimm/nd.h2
-rw-r--r--drivers/nvdimm/pfn_devs.c8
-rw-r--r--drivers/nvdimm/pmem.c90
-rw-r--r--drivers/nvdimm/pmem.h7
-rw-r--r--drivers/nvdimm/region.c24
-rw-r--r--drivers/nvdimm/region_devs.c83
16 files changed, 379 insertions, 89 deletions
diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig
index 59e750183b7f..5bdd499b5f4f 100644
--- a/drivers/nvdimm/Kconfig
+++ b/drivers/nvdimm/Kconfig
@@ -20,6 +20,7 @@ if LIBNVDIMM
config BLK_DEV_PMEM
tristate "PMEM: Persistent memory block device support"
default LIBNVDIMM
+ select DAX
select ND_BTT if BTT
select ND_PFN if NVDIMM_PFN
help
diff --git a/drivers/nvdimm/btt_devs.c b/drivers/nvdimm/btt_devs.c
index 97dd2925ed6e..4b76af2b8715 100644
--- a/drivers/nvdimm/btt_devs.c
+++ b/drivers/nvdimm/btt_devs.c
@@ -314,7 +314,7 @@ int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns)
if (rc < 0) {
struct nd_btt *nd_btt = to_nd_btt(btt_dev);
- __nd_detach_ndns(btt_dev, &nd_btt->ndns);
+ nd_detach_ndns(btt_dev, &nd_btt->ndns);
put_device(btt_dev);
}
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 351bac8f6503..e9361bffe5ee 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -27,6 +27,7 @@
#include <linux/nd.h>
#include "nd-core.h"
#include "nd.h"
+#include "pfn.h"
int nvdimm_major;
static int nvdimm_bus_major;
@@ -171,6 +172,57 @@ void nvdimm_region_notify(struct nd_region *nd_region, enum nvdimm_event event)
}
EXPORT_SYMBOL_GPL(nvdimm_region_notify);
+struct clear_badblocks_context {
+ resource_size_t phys, cleared;
+};
+
+static int nvdimm_clear_badblocks_region(struct device *dev, void *data)
+{
+ struct clear_badblocks_context *ctx = data;
+ struct nd_region *nd_region;
+ resource_size_t ndr_end;
+ sector_t sector;
+
+ /* make sure device is a region */
+ if (!is_nd_pmem(dev))
+ return 0;
+
+ nd_region = to_nd_region(dev);
+ ndr_end = nd_region->ndr_start + nd_region->ndr_size - 1;
+
+ /* make sure we are in the region */
+ if (ctx->phys < nd_region->ndr_start
+ || (ctx->phys + ctx->cleared) > ndr_end)
+ return 0;
+
+ sector = (ctx->phys - nd_region->ndr_start) / 512;
+ badblocks_clear(&nd_region->bb, sector, ctx->cleared / 512);
+
+ return 0;
+}
+
+static void nvdimm_clear_badblocks_regions(struct nvdimm_bus *nvdimm_bus,
+ phys_addr_t phys, u64 cleared)
+{
+ struct clear_badblocks_context ctx = {
+ .phys = phys,
+ .cleared = cleared,
+ };
+
+ device_for_each_child(&nvdimm_bus->dev, &ctx,
+ nvdimm_clear_badblocks_region);
+}
+
+static void nvdimm_account_cleared_poison(struct nvdimm_bus *nvdimm_bus,
+ phys_addr_t phys, u64 cleared)
+{
+ if (cleared > 0)
+ nvdimm_forget_poison(nvdimm_bus, phys, cleared);
+
+ if (cleared > 0 && cleared / 512)
+ nvdimm_clear_badblocks_regions(nvdimm_bus, phys, cleared);
+}
+
long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
unsigned int len)
{
@@ -218,7 +270,8 @@ long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
if (cmd_rc < 0)
return cmd_rc;
- nvdimm_clear_from_poison_list(nvdimm_bus, phys, len);
+ nvdimm_account_cleared_poison(nvdimm_bus, phys, clear_err.cleared);
+
return clear_err.cleared;
}
EXPORT_SYMBOL_GPL(nvdimm_clear_poison);
@@ -286,6 +339,7 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
init_waitqueue_head(&nvdimm_bus->probe_wait);
nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL);
mutex_init(&nvdimm_bus->reconfig_mutex);
+ spin_lock_init(&nvdimm_bus->poison_lock);
if (nvdimm_bus->id < 0) {
kfree(nvdimm_bus);
return NULL;
@@ -354,9 +408,9 @@ static int nd_bus_remove(struct device *dev)
nd_synchronize();
device_for_each_child(&nvdimm_bus->dev, NULL, child_unregister);
- nvdimm_bus_lock(&nvdimm_bus->dev);
+ spin_lock(&nvdimm_bus->poison_lock);
free_poison_list(&nvdimm_bus->poison_list);
- nvdimm_bus_unlock(&nvdimm_bus->dev);
+ spin_unlock(&nvdimm_bus->poison_lock);
nvdimm_bus_destroy_ndctl(nvdimm_bus);
@@ -769,16 +823,55 @@ void wait_nvdimm_bus_probe_idle(struct device *dev)
} while (true);
}
-static int pmem_active(struct device *dev, void *data)
+static int nd_pmem_forget_poison_check(struct device *dev, void *data)
{
- if (is_nd_pmem(dev) && dev->driver)
+ struct nd_cmd_clear_error *clear_err =
+ (struct nd_cmd_clear_error *)data;
+ struct nd_btt *nd_btt = is_nd_btt(dev) ? to_nd_btt(dev) : NULL;
+ struct nd_pfn *nd_pfn = is_nd_pfn(dev) ? to_nd_pfn(dev) : NULL;
+ struct nd_dax *nd_dax = is_nd_dax(dev) ? to_nd_dax(dev) : NULL;
+ struct nd_namespace_common *ndns = NULL;
+ struct nd_namespace_io *nsio;
+ resource_size_t offset = 0, end_trunc = 0, start, end, pstart, pend;
+
+ if (nd_dax || !dev->driver)
+ return 0;
+
+ start = clear_err->address;
+ end = clear_err->address + clear_err->cleared - 1;
+
+ if (nd_btt || nd_pfn || nd_dax) {
+ if (nd_btt)
+ ndns = nd_btt->ndns;
+ else if (nd_pfn)
+ ndns = nd_pfn->ndns;
+ else if (nd_dax)
+ ndns = nd_dax->nd_pfn.ndns;
+
+ if (!ndns)
+ return 0;
+ } else
+ ndns = to_ndns(dev);
+
+ nsio = to_nd_namespace_io(&ndns->dev);
+ pstart = nsio->res.start + offset;
+ pend = nsio->res.end - end_trunc;
+
+ if ((pstart >= start) && (pend <= end))
return -EBUSY;
+
return 0;
+
+}
+
+static int nd_ns_forget_poison_check(struct device *dev, void *data)
+{
+ return device_for_each_child(dev, data, nd_pmem_forget_poison_check);
}
/* set_config requires an idle interleave set */
static int nd_cmd_clear_to_send(struct nvdimm_bus *nvdimm_bus,
- struct nvdimm *nvdimm, unsigned int cmd)
+ struct nvdimm *nvdimm, unsigned int cmd, void *data)
{
struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
@@ -792,8 +885,8 @@ static int nd_cmd_clear_to_send(struct nvdimm_bus *nvdimm_bus,
/* require clear error to go through the pmem driver */
if (!nvdimm && cmd == ND_CMD_CLEAR_ERROR)
- return device_for_each_child(&nvdimm_bus->dev, NULL,
- pmem_active);
+ return device_for_each_child(&nvdimm_bus->dev, data,
+ nd_ns_forget_poison_check);
if (!nvdimm || cmd != ND_CMD_SET_CONFIG_DATA)
return 0;
@@ -820,7 +913,7 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
const char *cmd_name, *dimm_name;
unsigned long cmd_mask;
void *buf;
- int rc, i;
+ int rc, i, cmd_rc;
if (nvdimm) {
desc = nd_cmd_dimm_desc(cmd);
@@ -927,13 +1020,20 @@ static int __nd_ioctl(struct nvdimm_bus *nvdimm_bus, struct nvdimm *nvdimm,
}
nvdimm_bus_lock(&nvdimm_bus->dev);
- rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, cmd);
+ rc = nd_cmd_clear_to_send(nvdimm_bus, nvdimm, cmd, buf);
if (rc)
goto out_unlock;
- rc = nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, NULL);
+ rc = nd_desc->ndctl(nd_desc, nvdimm, cmd, buf, buf_len, &cmd_rc);
if (rc < 0)
goto out_unlock;
+
+ if (!nvdimm && cmd == ND_CMD_CLEAR_ERROR && cmd_rc >= 0) {
+ struct nd_cmd_clear_error *clear_err = buf;
+
+ nvdimm_account_cleared_poison(nvdimm_bus, clear_err->address,
+ clear_err->cleared);
+ }
nvdimm_bus_unlock(&nvdimm_bus->dev);
if (copy_to_user(p, buf, buf_len))
diff --git a/drivers/nvdimm/claim.c b/drivers/nvdimm/claim.c
index ca6d572c48fc..93d128da1c92 100644
--- a/drivers/nvdimm/claim.c
+++ b/drivers/nvdimm/claim.c
@@ -21,8 +21,13 @@
void __nd_detach_ndns(struct device *dev, struct nd_namespace_common **_ndns)
{
struct nd_namespace_common *ndns = *_ndns;
+ struct nvdimm_bus *nvdimm_bus;
- lockdep_assert_held(&ndns->dev.mutex);
+ if (!ndns)
+ return;
+
+ nvdimm_bus = walk_to_nvdimm_bus(&ndns->dev);
+ lockdep_assert_held(&nvdimm_bus->reconfig_mutex);
dev_WARN_ONCE(dev, ndns->claim != dev, "%s: invalid claim\n", __func__);
ndns->claim = NULL;
*_ndns = NULL;
@@ -37,18 +42,20 @@ void nd_detach_ndns(struct device *dev,
if (!ndns)
return;
get_device(&ndns->dev);
- device_lock(&ndns->dev);
+ nvdimm_bus_lock(&ndns->dev);
__nd_detach_ndns(dev, _ndns);
- device_unlock(&ndns->dev);
+ nvdimm_bus_unlock(&ndns->dev);
put_device(&ndns->dev);
}
bool __nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach,
struct nd_namespace_common **_ndns)
{
+ struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&attach->dev);
+
if (attach->claim)
return false;
- lockdep_assert_held(&attach->dev.mutex);
+ lockdep_assert_held(&nvdimm_bus->reconfig_mutex);
dev_WARN_ONCE(dev, *_ndns, "%s: invalid claim\n", __func__);
attach->claim = dev;
*_ndns = attach;
@@ -61,9 +68,9 @@ bool nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach,
{
bool claimed;
- device_lock(&attach->dev);
+ nvdimm_bus_lock(&attach->dev);
claimed = __nd_attach_ndns(dev, attach, _ndns);
- device_unlock(&attach->dev);
+ nvdimm_bus_unlock(&attach->dev);
return claimed;
}
@@ -114,7 +121,7 @@ static void nd_detach_and_reset(struct device *dev,
struct nd_namespace_common **_ndns)
{
/* detach the namespace and destroy / reset the device */
- nd_detach_ndns(dev, _ndns);
+ __nd_detach_ndns(dev, _ndns);
if (is_idle(dev, *_ndns)) {
nd_device_unregister(dev, ND_ASYNC);
} else if (is_nd_btt(dev)) {
@@ -184,7 +191,7 @@ ssize_t nd_namespace_store(struct device *dev,
}
WARN_ON_ONCE(!is_nvdimm_bus_locked(dev));
- if (!nd_attach_ndns(dev, ndns, _ndns)) {
+ if (!__nd_attach_ndns(dev, ndns, _ndns)) {
dev_dbg(dev, "%s already claimed\n",
dev_name(&ndns->dev));
len = -EBUSY;
@@ -239,22 +246,24 @@ static int nsio_rw_bytes(struct nd_namespace_common *ndns,
if (rw == READ) {
if (unlikely(is_bad_pmem(&nsio->bb, sector, sz_align)))
return -EIO;
- return memcpy_from_pmem(buf, nsio->addr + offset, size);
+ return memcpy_mcsafe(buf, nsio->addr + offset, size);
}
if (unlikely(is_bad_pmem(&nsio->bb, sector, sz_align))) {
/*
* FIXME: nsio_rw_bytes() may be called from atomic
- * context in the btt case and nvdimm_clear_poison()
- * takes a sleeping lock. Until the locking can be
- * reworked this capability requires that the namespace
- * is not claimed by btt.
+ * context in the btt case and the ACPI DSM path for
+ * clearing the error takes sleeping locks and allocates
+ * memory. An explicit error clearing path, and support
+ * for tracking badblocks in BTT metadata is needed to
+ * work around this collision.
*/
if (IS_ALIGNED(offset, 512) && IS_ALIGNED(size, 512)
&& (!ndns->claim || !is_nd_btt(ndns->claim))) {
long cleared;
- cleared = nvdimm_clear_poison(&ndns->dev, offset, size);
+ cleared = nvdimm_clear_poison(&ndns->dev,
+ nsio->res.start + offset, size);
if (cleared < size)
rc = -EIO;
if (cleared > 0 && cleared / 512) {
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index 9303cfeb8bee..2dee908e4bae 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -518,6 +518,15 @@ void nvdimm_badblocks_populate(struct nd_region *nd_region,
}
EXPORT_SYMBOL_GPL(nvdimm_badblocks_populate);
+static void append_poison_entry(struct nvdimm_bus *nvdimm_bus,
+ struct nd_poison *pl, u64 addr, u64 length)
+{
+ lockdep_assert_held(&nvdimm_bus->poison_lock);
+ pl->start = addr;
+ pl->length = length;
+ list_add_tail(&pl->list, &nvdimm_bus->poison_list);
+}
+
static int add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length,
gfp_t flags)
{
@@ -527,19 +536,24 @@ static int add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length,
if (!pl)
return -ENOMEM;
- pl->start = addr;
- pl->length = length;
- list_add_tail(&pl->list, &nvdimm_bus->poison_list);
-
+ append_poison_entry(nvdimm_bus, pl, addr, length);
return 0;
}
static int bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
{
- struct nd_poison *pl;
+ struct nd_poison *pl, *pl_new;
- if (list_empty(&nvdimm_bus->poison_list))
- return add_poison(nvdimm_bus, addr, length, GFP_KERNEL);
+ spin_unlock(&nvdimm_bus->poison_lock);
+ pl_new = kzalloc(sizeof(*pl_new), GFP_KERNEL);
+ spin_lock(&nvdimm_bus->poison_lock);
+
+ if (list_empty(&nvdimm_bus->poison_list)) {
+ if (!pl_new)
+ return -ENOMEM;
+ append_poison_entry(nvdimm_bus, pl_new, addr, length);
+ return 0;
+ }
/*
* There is a chance this is a duplicate, check for those first.
@@ -551,6 +565,7 @@ static int bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
/* If length has changed, update this list entry */
if (pl->length != length)
pl->length = length;
+ kfree(pl_new);
return 0;
}
@@ -559,29 +574,33 @@ 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, GFP_KERNEL);
+ if (!pl_new)
+ return -ENOMEM;
+ append_poison_entry(nvdimm_bus, pl_new, addr, length);
+
+ return 0;
}
int nvdimm_bus_add_poison(struct nvdimm_bus *nvdimm_bus, u64 addr, u64 length)
{
int rc;
- nvdimm_bus_lock(&nvdimm_bus->dev);
+ spin_lock(&nvdimm_bus->poison_lock);
rc = bus_add_poison(nvdimm_bus, addr, length);
- nvdimm_bus_unlock(&nvdimm_bus->dev);
+ spin_unlock(&nvdimm_bus->poison_lock);
return rc;
}
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)
+void nvdimm_forget_poison(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);
+ spin_lock(&nvdimm_bus->poison_lock);
WARN_ON_ONCE(list_empty(poison_list));
/*
@@ -628,15 +647,15 @@ void nvdimm_clear_from_poison_list(struct nvdimm_bus *nvdimm_bus,
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);
+ add_poison(nvdimm_bus, new_start, new_len, GFP_NOWAIT);
/* Adjust this entry to cover the left half */
pl->length = start - pl->start;
continue;
}
}
- nvdimm_bus_unlock(&nvdimm_bus->dev);
+ spin_unlock(&nvdimm_bus->poison_lock);
}
-EXPORT_SYMBOL_GPL(nvdimm_clear_from_poison_list);
+EXPORT_SYMBOL_GPL(nvdimm_forget_poison);
#ifdef CONFIG_BLK_DEV_INTEGRITY
int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
diff --git a/drivers/nvdimm/dax_devs.c b/drivers/nvdimm/dax_devs.c
index 45fa82cae87c..c1b6556aea6e 100644
--- a/drivers/nvdimm/dax_devs.c
+++ b/drivers/nvdimm/dax_devs.c
@@ -124,7 +124,7 @@ int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns)
dev_dbg(dev, "%s: dax: %s\n", __func__,
rc == 0 ? dev_name(dax_dev) : "<none>");
if (rc < 0) {
- __nd_detach_ndns(dax_dev, &nd_pfn->ndns);
+ nd_detach_ndns(dax_dev, &nd_pfn->ndns);
put_device(dax_dev);
} else
__nd_device_register(dax_dev);
diff --git a/drivers/nvdimm/dimm.c b/drivers/nvdimm/dimm.c
index ee0b412827bf..e0f0e3ce1a32 100644
--- a/drivers/nvdimm/dimm.c
+++ b/drivers/nvdimm/dimm.c
@@ -49,6 +49,8 @@ static int nvdimm_probe(struct device *dev)
kref_init(&ndd->kref);
rc = nvdimm_init_nsarea(ndd);
+ if (rc == -EACCES)
+ nvdimm_set_locked(dev);
if (rc)
goto err;
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index 8b721321be5b..fac1e9fbd11d 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -34,7 +34,7 @@ int nvdimm_check_config_data(struct device *dev)
if (!nvdimm->cmd_mask ||
!test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask)) {
- if (nvdimm->flags & NDD_ALIASING)
+ if (test_bit(NDD_ALIASING, &nvdimm->flags))
return -ENXIO;
else
return -ENOTTY;
@@ -67,6 +67,7 @@ int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd)
struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(ndd->dev);
struct nvdimm_bus_descriptor *nd_desc;
int rc = validate_dimm(ndd);
+ int cmd_rc = 0;
if (rc)
return rc;
@@ -76,8 +77,11 @@ int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd)
memset(cmd, 0, sizeof(*cmd));
nd_desc = nvdimm_bus->nd_desc;
- return nd_desc->ndctl(nd_desc, to_nvdimm(ndd->dev),
- ND_CMD_GET_CONFIG_SIZE, cmd, sizeof(*cmd), NULL);
+ rc = nd_desc->ndctl(nd_desc, to_nvdimm(ndd->dev),
+ ND_CMD_GET_CONFIG_SIZE, cmd, sizeof(*cmd), &cmd_rc);
+ if (rc < 0)
+ return rc;
+ return cmd_rc;
}
int nvdimm_init_config_data(struct nvdimm_drvdata *ndd)
@@ -188,7 +192,14 @@ void nvdimm_set_aliasing(struct device *dev)
{
struct nvdimm *nvdimm = to_nvdimm(dev);
- nvdimm->flags |= NDD_ALIASING;
+ set_bit(NDD_ALIASING, &nvdimm->flags);
+}
+
+void nvdimm_set_locked(struct device *dev)
+{
+ struct nvdimm *nvdimm = to_nvdimm(dev);
+
+ set_bit(NDD_LOCKED, &nvdimm->flags);
}
static void nvdimm_release(struct device *dev)
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 1b481a5fb966..2f9dfbd2dbec 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -2236,14 +2236,21 @@ static int init_active_labels(struct nd_region *nd_region)
int count, j;
/*
- * If the dimm is disabled then prevent the region from
- * being activated if it aliases DPA.
+ * If the dimm is disabled then we may need to prevent
+ * the region from being activated.
*/
if (!ndd) {
- if ((nvdimm->flags & NDD_ALIASING) == 0)
+ if (test_bit(NDD_LOCKED, &nvdimm->flags))
+ /* fail, label data may be unreadable */;
+ else if (test_bit(NDD_ALIASING, &nvdimm->flags))
+ /* fail, labels needed to disambiguate dpa */;
+ else
return 0;
- dev_dbg(&nd_region->dev, "%s: is disabled, failing probe\n",
- dev_name(&nd_mapping->nvdimm->dev));
+
+ dev_err(&nd_region->dev, "%s: is %s, failing probe\n",
+ dev_name(&nd_mapping->nvdimm->dev),
+ test_bit(NDD_LOCKED, &nvdimm->flags)
+ ? "locked" : "disabled");
return -ENXIO;
}
nd_mapping->ndd = ndd;
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index 8623e57c2ce3..4c4bd209e725 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -32,6 +32,7 @@ struct nvdimm_bus {
struct list_head poison_list;
struct list_head mapping_list;
struct mutex reconfig_mutex;
+ spinlock_t poison_lock;
};
struct nvdimm {
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 2a99c83aa19f..77d032192bf7 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -154,6 +154,7 @@ struct nd_region {
u64 ndr_start;
int id, num_lanes, ro, numa_node;
void *provider_data;
+ struct badblocks bb;
struct nd_interleave_set *nd_set;
struct nd_percpu_lane __percpu *lane;
struct nd_mapping mapping[0];
@@ -239,6 +240,7 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
unsigned int len);
void nvdimm_set_aliasing(struct device *dev);
+void nvdimm_set_locked(struct device *dev);
struct nd_btt *to_nd_btt(struct device *dev);
struct nd_gen_sb {
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index 6c033c9a2f06..335c8175410b 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -484,7 +484,7 @@ int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns)
dev_dbg(dev, "%s: pfn: %s\n", __func__,
rc == 0 ? dev_name(pfn_dev) : "<none>");
if (rc < 0) {
- __nd_detach_ndns(pfn_dev, &nd_pfn->ndns);
+ nd_detach_ndns(pfn_dev, &nd_pfn->ndns);
put_device(pfn_dev);
} else
__nd_device_register(pfn_dev);
@@ -538,7 +538,8 @@ static struct vmem_altmap *__nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
nd_pfn->npfns = le64_to_cpu(pfn_sb->npfns);
altmap = NULL;
} else if (nd_pfn->mode == PFN_MODE_PMEM) {
- nd_pfn->npfns = (resource_size(res) - offset) / PAGE_SIZE;
+ nd_pfn->npfns = PFN_SECTION_ALIGN_UP((resource_size(res)
+ - offset) / PAGE_SIZE);
if (le64_to_cpu(nd_pfn->pfn_sb->npfns) > nd_pfn->npfns)
dev_info(&nd_pfn->dev,
"number of pfns truncated from %lld to %ld\n",
@@ -625,7 +626,8 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
*/
start += start_pad;
size = resource_size(&nsio->res);
- npfns = (size - start_pad - end_trunc - SZ_8K) / SZ_4K;
+ npfns = PFN_SECTION_ALIGN_UP((size - start_pad - end_trunc - SZ_8K)
+ / PAGE_SIZE);
if (nd_pfn->mode == PFN_MODE_PMEM) {
/*
* vmemmap_populate_hugepages() allocates the memmap array in
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index fbc640bf06b0..c544d466ea51 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -29,6 +29,7 @@
#include <linux/pfn_t.h>
#include <linux/slab.h>
#include <linux/pmem.h>
+#include <linux/dax.h>
#include <linux/nd.h>
#include "pmem.h"
#include "pfn.h"
@@ -89,7 +90,7 @@ static int read_pmem(struct page *page, unsigned int off,
int rc;
void *mem = kmap_atomic(page);
- rc = memcpy_from_pmem(mem + off, pmem_addr, len);
+ rc = memcpy_mcsafe(mem + off, pmem_addr, len);
kunmap_atomic(mem);
if (rc)
return -EIO;
@@ -200,13 +201,13 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector,
}
/* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */
-__weak long pmem_direct_access(struct block_device *bdev, sector_t sector,
- void **kaddr, pfn_t *pfn, long size)
+__weak long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
+ long nr_pages, void **kaddr, pfn_t *pfn)
{
- struct pmem_device *pmem = bdev->bd_queue->queuedata;
- resource_size_t offset = sector * 512 + pmem->data_offset;
+ resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset;
- if (unlikely(is_bad_pmem(&pmem->bb, sector, size)))
+ if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512,
+ PFN_PHYS(nr_pages))))
return -EIO;
*kaddr = pmem->virt_addr + offset;
*pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags);
@@ -216,17 +217,28 @@ __weak long pmem_direct_access(struct block_device *bdev, sector_t sector,
* requested range.
*/
if (unlikely(pmem->bb.count))
- return size;
- return pmem->size - pmem->pfn_pad - offset;
+ return nr_pages;
+ return PHYS_PFN(pmem->size - pmem->pfn_pad - offset);
}
static const struct block_device_operations pmem_fops = {
.owner = THIS_MODULE,
.rw_page = pmem_rw_page,
- .direct_access = pmem_direct_access,
.revalidate_disk = nvdimm_revalidate_disk,
};
+static long pmem_dax_direct_access(struct dax_device *dax_dev,
+ pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn)
+{
+ struct pmem_device *pmem = dax_get_private(dax_dev);
+
+ return __pmem_direct_access(pmem, pgoff, nr_pages, kaddr, pfn);
+}
+
+static const struct dax_operations pmem_dax_ops = {
+ .direct_access = pmem_dax_direct_access,
+};
+
static void pmem_release_queue(void *q)
{
blk_cleanup_queue(q);
@@ -237,10 +249,14 @@ static void pmem_freeze_queue(void *q)
blk_freeze_queue_start(q);
}
-static void pmem_release_disk(void *disk)
+static void pmem_release_disk(void *__pmem)
{
- del_gendisk(disk);
- put_disk(disk);
+ struct pmem_device *pmem = __pmem;
+
+ kill_dax(pmem->dax_dev);
+ put_dax(pmem->dax_dev);
+ del_gendisk(pmem->disk);
+ put_disk(pmem->disk);
}
static int pmem_attach_disk(struct device *dev,
@@ -251,6 +267,7 @@ static int pmem_attach_disk(struct device *dev,
struct vmem_altmap __altmap, *altmap = NULL;
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;
@@ -334,6 +351,7 @@ static int pmem_attach_disk(struct device *dev,
disk = alloc_disk_node(0, nid);
if (!disk)
return -ENOMEM;
+ pmem->disk = disk;
disk->fops = &pmem_fops;
disk->queue = q;
@@ -345,9 +363,16 @@ static int pmem_attach_disk(struct device *dev,
return -ENOMEM;
nvdimm_badblocks_populate(nd_region, &pmem->bb, res);
disk->bb = &pmem->bb;
- device_add_disk(dev, disk);
- if (devm_add_action_or_reset(dev, pmem_release_disk, disk))
+ dax_dev = alloc_dax(pmem, disk->disk_name, &pmem_dax_ops);
+ if (!dax_dev) {
+ put_disk(disk);
+ return -ENOMEM;
+ }
+ pmem->dax_dev = dax_dev;
+
+ device_add_disk(dev, disk);
+ if (devm_add_action_or_reset(dev, pmem_release_disk, pmem))
return -ENOMEM;
revalidate_disk(disk);
@@ -397,12 +422,12 @@ static void nd_pmem_shutdown(struct device *dev)
static void nd_pmem_notify(struct device *dev, enum nvdimm_event event)
{
- struct pmem_device *pmem = dev_get_drvdata(dev);
- struct nd_region *nd_region = to_region(pmem);
+ struct nd_region *nd_region;
resource_size_t offset = 0, end_trunc = 0;
struct nd_namespace_common *ndns;
struct nd_namespace_io *nsio;
struct resource res;
+ struct badblocks *bb;
if (event != NVDIMM_REVALIDATE_POISON)
return;
@@ -411,20 +436,33 @@ static void nd_pmem_notify(struct device *dev, enum nvdimm_event event)
struct nd_btt *nd_btt = to_nd_btt(dev);
ndns = nd_btt->ndns;
- } else if (is_nd_pfn(dev)) {
- struct nd_pfn *nd_pfn = to_nd_pfn(dev);
- struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
+ nd_region = to_nd_region(ndns->dev.parent);
+ nsio = to_nd_namespace_io(&ndns->dev);
+ bb = &nsio->bb;
+ } else {
+ struct pmem_device *pmem = dev_get_drvdata(dev);
- ndns = nd_pfn->ndns;
- offset = pmem->data_offset + __le32_to_cpu(pfn_sb->start_pad);
- end_trunc = __le32_to_cpu(pfn_sb->end_trunc);
- } else
- ndns = to_ndns(dev);
+ nd_region = to_region(pmem);
+ bb = &pmem->bb;
+
+ if (is_nd_pfn(dev)) {
+ struct nd_pfn *nd_pfn = to_nd_pfn(dev);
+ struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
+
+ ndns = nd_pfn->ndns;
+ offset = pmem->data_offset +
+ __le32_to_cpu(pfn_sb->start_pad);
+ end_trunc = __le32_to_cpu(pfn_sb->end_trunc);
+ } else {
+ ndns = to_ndns(dev);
+ }
+
+ nsio = to_nd_namespace_io(&ndns->dev);
+ }
- nsio = to_nd_namespace_io(&ndns->dev);
res.start = nsio->res.start + offset;
res.end = nsio->res.end - end_trunc;
- nvdimm_badblocks_populate(nd_region, &pmem->bb, &res);
+ nvdimm_badblocks_populate(nd_region, bb, &res);
}
MODULE_ALIAS("pmem");
diff --git a/drivers/nvdimm/pmem.h b/drivers/nvdimm/pmem.h
index b4ee4f71b4a1..7f4dbd72a90a 100644
--- a/drivers/nvdimm/pmem.h
+++ b/drivers/nvdimm/pmem.h
@@ -5,8 +5,6 @@
#include <linux/pfn_t.h>
#include <linux/fs.h>
-long pmem_direct_access(struct block_device *bdev, sector_t sector,
- void **kaddr, pfn_t *pfn, long size);
/* this definition is in it's own header for tools/testing/nvdimm to consume */
struct pmem_device {
/* One contiguous memory region per device */
@@ -20,5 +18,10 @@ struct pmem_device {
/* trim size when namespace capacity has been section aligned */
u32 pfn_pad;
struct badblocks bb;
+ struct dax_device *dax_dev;
+ struct gendisk *disk;
};
+
+long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
+ long nr_pages, void **kaddr, pfn_t *pfn);
#endif /* __NVDIMM_PMEM_H__ */
diff --git a/drivers/nvdimm/region.c b/drivers/nvdimm/region.c
index 8f241772ec0b..869a886c292e 100644
--- a/drivers/nvdimm/region.c
+++ b/drivers/nvdimm/region.c
@@ -14,6 +14,7 @@
#include <linux/module.h>
#include <linux/device.h>
#include <linux/nd.h>
+#include "nd-core.h"
#include "nd.h"
static int nd_region_probe(struct device *dev)
@@ -52,6 +53,17 @@ static int nd_region_probe(struct device *dev)
if (rc && err && rc == err)
return -ENODEV;
+ if (is_nd_pmem(&nd_region->dev)) {
+ struct resource ndr_res;
+
+ if (devm_init_badblocks(dev, &nd_region->bb))
+ return -ENODEV;
+ ndr_res.start = nd_region->ndr_start;
+ ndr_res.end = nd_region->ndr_start + nd_region->ndr_size - 1;
+ nvdimm_badblocks_populate(nd_region,
+ &nd_region->bb, &ndr_res);
+ }
+
nd_region->btt_seed = nd_btt_create(nd_region);
nd_region->pfn_seed = nd_pfn_create(nd_region);
nd_region->dax_seed = nd_dax_create(nd_region);
@@ -104,6 +116,18 @@ static int child_notify(struct device *dev, void *data)
static void nd_region_notify(struct device *dev, enum nvdimm_event event)
{
+ if (event == NVDIMM_REVALIDATE_POISON) {
+ struct nd_region *nd_region = to_nd_region(dev);
+ struct resource res;
+
+ if (is_nd_pmem(&nd_region->dev)) {
+ res.start = nd_region->ndr_start;
+ res.end = nd_region->ndr_start +
+ nd_region->ndr_size - 1;
+ nvdimm_badblocks_populate(nd_region,
+ &nd_region->bb, &res);
+ }
+ }
device_for_each_child(dev, &event, child_notify);
}
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index b7cb5066d961..b550edf2571f 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -222,7 +222,7 @@ int nd_region_to_nstype(struct nd_region *nd_region)
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
struct nvdimm *nvdimm = nd_mapping->nvdimm;
- if (nvdimm->flags & NDD_ALIASING)
+ if (test_bit(NDD_ALIASING, &nvdimm->flags))
alias++;
}
if (alias)
@@ -255,6 +255,35 @@ static ssize_t size_show(struct device *dev,
}
static DEVICE_ATTR_RO(size);
+static ssize_t deep_flush_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nd_region *nd_region = to_nd_region(dev);
+
+ /*
+ * NOTE: in the nvdimm_has_flush() error case this attribute is
+ * not visible.
+ */
+ return sprintf(buf, "%d\n", nvdimm_has_flush(nd_region));
+}
+
+static ssize_t deep_flush_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ bool flush;
+ int rc = strtobool(buf, &flush);
+ struct nd_region *nd_region = to_nd_region(dev);
+
+ if (rc)
+ return rc;
+ if (!flush)
+ return -EINVAL;
+ nvdimm_flush(nd_region);
+
+ return len;
+}
+static DEVICE_ATTR_RW(deep_flush);
+
static ssize_t mappings_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -448,6 +477,25 @@ static ssize_t read_only_store(struct device *dev,
}
static DEVICE_ATTR_RW(read_only);
+static ssize_t region_badblocks_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nd_region *nd_region = to_nd_region(dev);
+
+ return badblocks_show(&nd_region->bb, buf, 0);
+}
+
+static DEVICE_ATTR(badblocks, 0444, region_badblocks_show, NULL);
+
+static ssize_t resource_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nd_region *nd_region = to_nd_region(dev);
+
+ return sprintf(buf, "%#llx\n", nd_region->ndr_start);
+}
+static DEVICE_ATTR_RO(resource);
+
static struct attribute *nd_region_attributes[] = {
&dev_attr_size.attr,
&dev_attr_nstype.attr,
@@ -455,11 +503,14 @@ static struct attribute *nd_region_attributes[] = {
&dev_attr_btt_seed.attr,
&dev_attr_pfn_seed.attr,
&dev_attr_dax_seed.attr,
+ &dev_attr_deep_flush.attr,
&dev_attr_read_only.attr,
&dev_attr_set_cookie.attr,
&dev_attr_available_size.attr,
&dev_attr_namespace_seed.attr,
&dev_attr_init_namespaces.attr,
+ &dev_attr_badblocks.attr,
+ &dev_attr_resource.attr,
NULL,
};
@@ -476,6 +527,23 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n)
if (!is_nd_pmem(dev) && a == &dev_attr_dax_seed.attr)
return 0;
+ if (!is_nd_pmem(dev) && a == &dev_attr_badblocks.attr)
+ return 0;
+
+ if (!is_nd_pmem(dev) && a == &dev_attr_resource.attr)
+ return 0;
+
+ if (a == &dev_attr_deep_flush.attr) {
+ int has_flush = nvdimm_has_flush(nd_region);
+
+ if (has_flush == 1)
+ return a->mode;
+ else if (has_flush == 0)
+ return 0444;
+ else
+ return 0;
+ }
+
if (a != &dev_attr_set_cookie.attr
&& a != &dev_attr_available_size.attr)
return a->mode;
@@ -813,7 +881,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
return NULL;
}
- if (nvdimm->flags & NDD_UNARMED)
+ if (test_bit(NDD_UNARMED, &nvdimm->flags))
ro = 1;
}
@@ -968,17 +1036,20 @@ EXPORT_SYMBOL_GPL(nvdimm_flush);
*/
int nvdimm_has_flush(struct nd_region *nd_region)
{
- struct nd_region_data *ndrd = dev_get_drvdata(&nd_region->dev);
int i;
/* no nvdimm == flushing capability unknown */
if (nd_region->ndr_mappings == 0)
return -ENXIO;
- for (i = 0; i < nd_region->ndr_mappings; i++)
- /* flush hints present, flushing required */
- if (ndrd_get_flush_wpq(ndrd, i, 0))
+ for (i = 0; i < nd_region->ndr_mappings; i++) {
+ struct nd_mapping *nd_mapping = &nd_region->mapping[i];
+ struct nvdimm *nvdimm = nd_mapping->nvdimm;
+
+ /* flush hints present / available */
+ if (nvdimm->num_flush)
return 1;
+ }
/*
* The platform defines dimm devices without hints, assume
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-09 09:11:23 +0000