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Commit 979fccfb authored by Dan Williams's avatar Dan Williams
Browse files

libnvdimm, pfn: enable pfn sysfs interface unit testing 



The unit test infrastructure uses CMA and real memory to emulate nvdimm
resources.  The call to devm_memremap_pages() can simply be mocked in
the same manner as memremap and we mock phys_to_pfn_t() to clear PFN_MAP
since these resources are not registered with in the pgmap_radix.

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 2dc43331

tools/testing/nvdimm/Kbuild

+2 −0
Original line number Original line Diff line number Diff line
@@ -9,6 +9,8 @@ ldflags-y += --wrap=memunmap 
ldflags-y += --wrap=__devm_request_region

ldflags-y += --wrap=__devm_request_region

ldflags-y += --wrap=__request_region

ldflags-y += --wrap=__request_region

ldflags-y += --wrap=__release_region

ldflags-y += --wrap=__release_region

ldflags-y += --wrap=devm_memremap_pages

ldflags-y += --wrap=phys_to_pfn_t





DRIVERS := ../../../drivers

DRIVERS := ../../../drivers

NVDIMM_SRC := $(DRIVERS)/nvdimm

NVDIMM_SRC := $(DRIVERS)/nvdimm

tools/testing/nvdimm/test/iomap.c

+48 −0
Original line number Original line Diff line number Diff line
@@ -94,6 +94,54 @@ void *__wrap_devm_memremap(struct device *dev, resource_size_t offset, 
}

}

EXPORT_SYMBOL(__wrap_devm_memremap);

EXPORT_SYMBOL(__wrap_devm_memremap);





#ifdef __HAVE_ARCH_PTE_DEVMAP

#include <linux/memremap.h>

#include <linux/pfn_t.h>



void *__wrap_devm_memremap_pages(struct device *dev, struct resource *res,

		struct percpu_ref *ref, struct vmem_altmap *altmap)

{

	resource_size_t offset = res->start;

	struct nfit_test_resource *nfit_res;



	rcu_read_lock();

	nfit_res = get_nfit_res(offset);

	rcu_read_unlock();

	if (nfit_res)

		return nfit_res->buf + offset - nfit_res->res->start;

	return devm_memremap_pages(dev, res, ref, altmap);

}

EXPORT_SYMBOL(__wrap_devm_memremap_pages);



pfn_t __wrap_phys_to_pfn_t(dma_addr_t addr, unsigned long flags)

{

	struct nfit_test_resource *nfit_res;



	rcu_read_lock();

	nfit_res = get_nfit_res(addr);

	rcu_read_unlock();

	if (nfit_res)

		flags &= ~PFN_MAP;

        return phys_to_pfn_t(addr, flags);

}

EXPORT_SYMBOL(__wrap_phys_to_pfn_t);

#else

/* to be removed post 4.5-rc1 */

void *__wrap_devm_memremap_pages(struct device *dev, struct resource *res)

{

	resource_size_t offset = res->start;

	struct nfit_test_resource *nfit_res;



	rcu_read_lock();

	nfit_res = get_nfit_res(offset);

	rcu_read_unlock();

	if (nfit_res)

		return nfit_res->buf + offset - nfit_res->res->start;

	return devm_memremap_pages(dev, res);

}

EXPORT_SYMBOL(__wrap_devm_memremap_pages);

#endif



void *__wrap_memremap(resource_size_t offset, size_t size,

void *__wrap_memremap(resource_size_t offset, size_t size,

		unsigned long flags)

		unsigned long flags)

{

{