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Merge branch 'for-4.7/dax' into libnvdimm-for-next

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This commit is contained in:
Dan Williams
2016-05-21 12:33:04 -07:00
parent 1b982baf75 03dca343af
commit 36092ee8ba
26 changed files with 935 additions and 143 deletions
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40
drivers/nvdimm/pfn_devs.c
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@@ -54,25 +54,6 @@ struct nd_pfn *to_nd_pfn(struct device *dev)
}
EXPORT_SYMBOL(to_nd_pfn);
static struct nd_pfn *to_nd_pfn_safe(struct device *dev)
{
/*
* pfn device attributes are re-used by dax device instances, so we
* need to be careful to correct device-to-nd_pfn conversion.
*/
if (is_nd_pfn(dev))
return to_nd_pfn(dev);
if (is_nd_dax(dev)) {
struct nd_dax *nd_dax = to_nd_dax(dev);
return &nd_dax->nd_pfn;
}
WARN_ON(1);
return NULL;
}
static ssize_t mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -360,7 +341,7 @@ struct device *nd_pfn_create(struct nd_region *nd_region)
return dev;
}
int nd_pfn_validate(struct nd_pfn *nd_pfn)
int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
{
u64 checksum, offset;
struct nd_namespace_io *nsio;
@@ -377,7 +358,7 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn)
if (nvdimm_read_bytes(ndns, SZ_4K, pfn_sb, sizeof(*pfn_sb)))
return -ENXIO;
if (memcmp(pfn_sb->signature, PFN_SIG, PFN_SIG_LEN) != 0)
if (memcmp(pfn_sb->signature, sig, PFN_SIG_LEN) != 0)
return -ENODEV;
checksum = le64_to_cpu(pfn_sb->checksum);
@@ -416,6 +397,8 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn)
return -ENODEV;
}
if (nd_pfn->align == 0)
nd_pfn->align = le32_to_cpu(pfn_sb->align);
if (nd_pfn->align > nvdimm_namespace_capacity(ndns)) {
dev_err(&nd_pfn->dev, "alignment: %lx exceeds capacity %llx\n",
nd_pfn->align, nvdimm_namespace_capacity(ndns));
@@ -436,8 +419,8 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn)
return -EBUSY;
}
nd_pfn->align = le32_to_cpu(pfn_sb->align);
if (!is_power_of_2(offset) || offset < PAGE_SIZE) {
if ((nd_pfn->align && !IS_ALIGNED(offset, nd_pfn->align))
|| !IS_ALIGNED(offset, PAGE_SIZE)) {
dev_err(&nd_pfn->dev, "bad offset: %#llx dax disabled\n",
offset);
return -ENXIO;
@@ -467,7 +450,7 @@ int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns)
pfn_sb = devm_kzalloc(dev, sizeof(*pfn_sb), GFP_KERNEL);
nd_pfn = to_nd_pfn(pfn_dev);
nd_pfn->pfn_sb = pfn_sb;
rc = nd_pfn_validate(nd_pfn);
rc = nd_pfn_validate(nd_pfn, PFN_SIG);
dev_dbg(dev, "%s: pfn: %s\n", __func__,
rc == 0 ? dev_name(pfn_dev) : "<none>");
if (rc < 0) {
@@ -552,6 +535,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
struct nd_pfn_sb *pfn_sb;
unsigned long npfns;
phys_addr_t offset;
const char *sig;
u64 checksum;
int rc;
@@ -560,7 +544,11 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
return -ENOMEM;
nd_pfn->pfn_sb = pfn_sb;
rc = nd_pfn_validate(nd_pfn);
if (is_nd_dax(&nd_pfn->dev))
sig = DAX_SIG;
else
sig = PFN_SIG;
rc = nd_pfn_validate(nd_pfn, sig);
if (rc != -ENODEV)
return rc;
@@ -635,7 +623,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
pfn_sb->mode = cpu_to_le32(nd_pfn->mode);
pfn_sb->dataoff = cpu_to_le64(offset);
pfn_sb->npfns = cpu_to_le64(npfns);
memcpy(pfn_sb->signature, PFN_SIG, PFN_SIG_LEN);
memcpy(pfn_sb->signature, sig, PFN_SIG_LEN);
memcpy(pfn_sb->uuid, nd_pfn->uuid, 16);
memcpy(pfn_sb->parent_uuid, nd_dev_to_uuid(&ndns->dev), 16);
pfn_sb->version_major = cpu_to_le16(1);