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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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1
tools/testing/nvdimm/Kbuild
View File

@@ -7,6 +7,7 @@ ldflags-y += --wrap=ioremap_nocache
ldflags-y += --wrap=iounmap
ldflags-y += --wrap=memunmap
ldflags-y += --wrap=__devm_request_region
ldflags-y += --wrap=__devm_release_region
ldflags-y += --wrap=__request_region
ldflags-y += --wrap=__release_region
ldflags-y += --wrap=devm_memremap_pages

27
tools/testing/nvdimm/test/iomap.c
View File

@@ -239,13 +239,11 @@ struct resource *__wrap___devm_request_region(struct device *dev,
}
EXPORT_SYMBOL(__wrap___devm_request_region);
void __wrap___release_region(struct resource *parent, resource_size_t start,
resource_size_t n)
static bool nfit_test_release_region(struct resource *parent,
resource_size_t start, resource_size_t n)
{
struct nfit_test_resource *nfit_res;
if (parent == &iomem_resource) {
nfit_res = get_nfit_res(start);
struct nfit_test_resource *nfit_res = get_nfit_res(start);
if (nfit_res) {
struct resource *res = nfit_res->res + 1;
@@ -254,11 +252,26 @@ void __wrap___release_region(struct resource *parent, resource_size_t start,
__func__, start, n, res);
else
memset(res, 0, sizeof(*res));
return;
return true;
}
}
__release_region(parent, start, n);
return false;
}
void __wrap___release_region(struct resource *parent, resource_size_t start,
resource_size_t n)
{
if (!nfit_test_release_region(parent, start, n))
__release_region(parent, start, n);
}
EXPORT_SYMBOL(__wrap___release_region);
void __wrap___devm_release_region(struct device *dev, struct resource *parent,
resource_size_t start, resource_size_t n)
{
if (!nfit_test_release_region(parent, start, n))
__devm_release_region(dev, parent, start, n);
}
EXPORT_SYMBOL(__wrap___devm_release_region);
MODULE_LICENSE("GPL v2");