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Date: Thu, 08 Jun 2017 22:09:06 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: linux-nvdimm@...ts.01.org
Cc: linux-acpi@...r.kernel.org,
Ross Zwisler <ross.zwisler@...ux.intel.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 3/9] libnvdimm,
label: honor the lba size specified in v1.2 labels
Previously we only honored the lba size for blk-aperture mode
namespaces. For pmem namespaces the lba size was just assumed to be 512.
With the new v1.2 label definition and compatibility with other
operating environments, the ->lbasize property is now respected for pmem
namespaces.
Cc: Ross Zwisler <ross.zwisler@...ux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
drivers/nvdimm/namespace_devs.c | 65 ++++++++++++++++++++++++++++++++-------
drivers/nvdimm/nd.h | 1 +
drivers/nvdimm/pmem.c | 1 +
include/linux/nd.h | 2 +
4 files changed, 57 insertions(+), 12 deletions(-)
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 51f304fe8a52..e034b003a5e2 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -163,6 +163,29 @@ bool pmem_should_map_pages(struct device *dev)
}
EXPORT_SYMBOL(pmem_should_map_pages);
+unsigned int pmem_sector_size(struct nd_namespace_common *ndns)
+{
+ if (is_namespace_pmem(&ndns->dev)) {
+ struct nd_namespace_pmem *nspm;
+
+ nspm = to_nd_namespace_pmem(&ndns->dev);
+ if (nspm->lbasize == 0 || nspm->lbasize == 512)
+ /* default */;
+ else if (nspm->lbasize == 4096)
+ return 4096;
+ else
+ dev_WARN(&ndns->dev, "unsupported sector size: %ld\n",
+ nspm->lbasize);
+ }
+
+ /*
+ * There is no namespace label (is_namespace_io()), or the label
+ * indicates the default sector size.
+ */
+ return 512;
+}
+EXPORT_SYMBOL(pmem_sector_size);
+
const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
char *name)
{
@@ -1283,28 +1306,49 @@ static ssize_t resource_show(struct device *dev,
}
static DEVICE_ATTR_RO(resource);
-static const unsigned long ns_lbasize_supported[] = { 512, 520, 528,
+static const unsigned long blk_lbasize_supported[] = { 512, 520, 528,
4096, 4104, 4160, 4224, 0 };
+static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 };
+
static ssize_t sector_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
+ if (is_namespace_blk(dev)) {
+ struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
- if (!is_namespace_blk(dev))
- return -ENXIO;
+ return nd_sector_size_show(nsblk->lbasize,
+ blk_lbasize_supported, buf);
+ }
- return nd_sector_size_show(nsblk->lbasize, ns_lbasize_supported, buf);
+ if (is_namespace_pmem(dev)) {
+ struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
+
+ return nd_sector_size_show(nspm->lbasize,
+ pmem_lbasize_supported, buf);
+ }
+ return -ENXIO;
}
static ssize_t sector_size_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t len)
{
- struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
struct nd_region *nd_region = to_nd_region(dev->parent);
+ const unsigned long *supported;
+ unsigned long *lbasize;
ssize_t rc = 0;
- if (!is_namespace_blk(dev))
+ if (is_namespace_blk(dev)) {
+ struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev);
+
+ lbasize = &nsblk->lbasize;
+ supported = blk_lbasize_supported;
+ } else if (is_namespace_pmem(dev)) {
+ struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
+
+ lbasize = &nspm->lbasize;
+ supported = pmem_lbasize_supported;
+ } else
return -ENXIO;
device_lock(dev);
@@ -1312,8 +1356,7 @@ static ssize_t sector_size_store(struct device *dev,
if (to_ndns(dev)->claim)
rc = -EBUSY;
if (rc >= 0)
- rc = nd_sector_size_store(dev, buf, &nsblk->lbasize,
- ns_lbasize_supported);
+ rc = nd_sector_size_store(dev, buf, lbasize, supported);
if (rc >= 0)
rc = nd_namespace_label_update(nd_region, dev);
dev_dbg(dev, "%s: result: %zd %s: %s%s", __func__,
@@ -1458,9 +1501,6 @@ static umode_t namespace_visible(struct kobject *kobj,
if (a == &dev_attr_size.attr)
return 0644;
- if (is_namespace_pmem(dev) && a == &dev_attr_sector_size.attr)
- return 0;
-
return a->mode;
}
@@ -1795,6 +1835,7 @@ struct device *create_namespace_pmem(struct nd_region *nd_region,
NSLABEL_NAME_LEN, GFP_KERNEL);
nspm->uuid = kmemdup((void __force *) label0->uuid,
NSLABEL_UUID_LEN, GFP_KERNEL);
+ nspm->lbasize = __le64_to_cpu(label0->lbasize);
}
if (!nspm->alt_name || !nspm->uuid) {
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index ad4e518940c9..17cecb38dfc9 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -356,6 +356,7 @@ int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt);
const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
char *name);
+unsigned int pmem_sector_size(struct nd_namespace_common *ndns);
void nvdimm_badblocks_populate(struct nd_region *nd_region,
struct badblocks *bb, const struct resource *res);
#if IS_ENABLED(CONFIG_ND_CLAIM)
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index c544d466ea51..5c45e178bd4a 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -342,6 +342,7 @@ static int pmem_attach_disk(struct device *dev,
blk_queue_write_cache(q, true, true);
blk_queue_make_request(q, pmem_make_request);
blk_queue_physical_block_size(q, PAGE_SIZE);
+ blk_queue_logical_block_size(q, pmem_sector_size(ndns));
blk_queue_max_hw_sectors(q, UINT_MAX);
blk_queue_bounce_limit(q, BLK_BOUNCE_ANY);
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
diff --git a/include/linux/nd.h b/include/linux/nd.h
index 194b8e002ea7..d8f5023b49ae 100644
--- a/include/linux/nd.h
+++ b/include/linux/nd.h
@@ -75,12 +75,14 @@ struct nd_namespace_io {
/**
* struct nd_namespace_pmem - namespace device for dimm-backed interleaved memory
* @nsio: device and system physical address range to drive
+ * @lbasize: logical sector size for the namespace in block-device-mode
* @alt_name: namespace name supplied in the dimm label
* @uuid: namespace name supplied in the dimm label
* @id: ida allocated id
*/
struct nd_namespace_pmem {
struct nd_namespace_io nsio;
+ unsigned long lbasize;
char *alt_name;
u8 *uuid;
int id;
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