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libnvdimm, pmem, pfn: make pmem_rw_bytes generic and refactor pfn setup

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In preparation for providing an alternative (to block device) access
mechanism to persistent memory, convert pmem_rw_bytes() to
nsio_rw_bytes().  This allows ->rw_bytes() functionality without
requiring a 'struct pmem_device' to be instantiated.

In other words, when ->rw_bytes() is in use i/o is driven through
'struct nd_namespace_io', otherwise it is driven through 'struct
pmem_device' and the block layer.  This consolidates the disjoint calls
to devm_exit_badblocks() and devm_memunmap() into a common
devm_nsio_disable() and cleans up the init path to use a unified
pmem_attach_disk() implementation.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2016-03-22 00:22:16 -07:00
parent 947df02d25
commit 200c79da82
9 changed files with 211 additions and 173 deletions
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4
drivers/nvdimm/btt_devs.c
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@@ -273,8 +273,7 @@ static int __nd_btt_probe(struct nd_btt *nd_btt,
return 0;
}
int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns,
void *drvdata)
int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns)
{
int rc;
struct device *btt_dev;
@@ -289,7 +288,6 @@ int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns,
nvdimm_bus_unlock(&ndns->dev);
if (!btt_dev)
return -ENOMEM;
dev_set_drvdata(btt_dev, drvdata);
btt_sb = devm_kzalloc(dev, sizeof(*btt_sb), GFP_KERNEL);
rc = __nd_btt_probe(to_nd_btt(btt_dev), ndns, btt_sb);
dev_dbg(dev, "%s: btt: %s\n", __func__,