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libnvdimm, nfit: move flush hint mapping to region-device driver-data

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In preparation for triggering flushes of a DIMM's writes-posted-queue
(WPQ) via the pmem driver move mapping of flush hint addresses to the
region driver.  Since this uses devm_nvdimm_memremap() the flush
addresses will remain mapped while any region to which the dimm belongs
is active.

We need to communicate more information to the nvdimm core to facilitate
this mapping, namely each dimm object now carries an array of flush hint
address resources.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2016-06-07 17:00:04 -07:00
parent a8a6d2e04c
commit e5ae3b252c
8 changed files with 119 additions and 18 deletions
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16
drivers/nvdimm/region.c
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@@ -20,7 +20,7 @@ static int nd_region_probe(struct device *dev)
{
int err, rc;
static unsigned long once;
struct nd_region_namespaces *num_ns;
struct nd_region_data *ndrd;
struct nd_region *nd_region = to_nd_region(dev);
if (nd_region->num_lanes > num_online_cpus()
@@ -33,21 +33,21 @@ static int nd_region_probe(struct device *dev)
nd_region->num_lanes);
}
rc = nd_region_activate(nd_region);
if (rc)
return rc;
rc = nd_blk_region_init(nd_region);
if (rc)
return rc;
rc = nd_region_register_namespaces(nd_region, &err);
num_ns = devm_kzalloc(dev, sizeof(*num_ns), GFP_KERNEL);
if (!num_ns)
return -ENOMEM;
if (rc < 0)
return rc;
num_ns->active = rc;
num_ns->count = rc + err;
dev_set_drvdata(dev, num_ns);
ndrd = dev_get_drvdata(dev);
ndrd->ns_active = rc;
ndrd->ns_count = rc + err;
if (rc && err && rc == err)
return -ENODEV;