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Commit c14a868a authored by Dan Williams's avatar Dan Williams
Browse files

tools/testing/nvdimm: unit test for acpi_nfit_notify() 



We have had a couple bugs in this implementation in the past and before
we add another ->notify() implementation for nvdimm devices, lets allow
this routine to be exercised via nfit_test.

Rewrite acpi_nfit_notify() in terms of a generic struct device and
acpi_handle parameter, and then implement a mock acpi_evaluate_object()
that returns a _FIT payload.

Cc: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: default avatarVishal Verma <vishal.l.verma@intel.com>
Acked-by: default avatarRafael J. Wysocki <rafael@kernel.org>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent c09f1218

drivers/acpi/nfit/core.c

+14 −11
Original line number Diff line number Diff line
@@ -2670,11 +2670,10 @@ static int acpi_nfit_remove(struct acpi_device *adev) 
	return 0;

}



static void acpi_nfit_notify(struct acpi_device *adev, u32 event)

void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event)

{

	struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(&adev->dev);

	struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);

	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };

	struct device *dev = &adev->dev;

	union acpi_object *obj;

	acpi_status status;

	int ret;
@@ -2684,18 +2683,17 @@ static void acpi_nfit_notify(struct acpi_device *adev, u32 event) 
	if (event != NFIT_NOTIFY_UPDATE)

		return;



	device_lock(dev);

	if (!dev->driver) {

		/* dev->driver may be null if we're being removed */

		dev_dbg(dev, "%s: no driver found for dev\n", __func__);

		goto out_unlock;

		return;

	}



	if (!acpi_desc) {

		acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL);

		if (!acpi_desc)

			goto out_unlock;

		acpi_nfit_desc_init(acpi_desc, &adev->dev);

			return;

		acpi_nfit_desc_init(acpi_desc, dev);

	} else {

		/*

		 * Finish previous registration before considering new
@@ -2705,10 +2703,10 @@ static void acpi_nfit_notify(struct acpi_device *adev, u32 event) 
	}



	/* Evaluate _FIT */

	status = acpi_evaluate_object(adev->handle, "_FIT", NULL, &buf);

	status = acpi_evaluate_object(handle, "_FIT", NULL, &buf);

	if (ACPI_FAILURE(status)) {

		dev_err(dev, "failed to evaluate _FIT\n");

		goto out_unlock;

		return;

	}



	obj = buf.pointer;
@@ -2720,9 +2718,14 @@ static void acpi_nfit_notify(struct acpi_device *adev, u32 event) 
	} else

		dev_err(dev, "Invalid _FIT\n");

	kfree(buf.pointer);

}

EXPORT_SYMBOL_GPL(__acpi_nfit_notify);



 out_unlock:

	device_unlock(dev);

static void acpi_nfit_notify(struct acpi_device *adev, u32 event)

{

	device_lock(&adev->dev);

	__acpi_nfit_notify(&adev->dev, adev->handle, event);

	device_unlock(&adev->dev);

}



static const struct acpi_device_id acpi_nfit_ids[] = {

drivers/acpi/nfit/nfit.h

+1 −0
Original line number Diff line number Diff line
@@ -227,5 +227,6 @@ static inline struct acpi_nfit_desc *to_acpi_desc( 


const u8 *to_nfit_uuid(enum nfit_uuids id);

int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);

void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);

void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);

#endif /* __NFIT_H__ */

tools/testing/nvdimm/Kbuild

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ ldflags-y += --wrap=__release_region 
ldflags-y += --wrap=devm_memremap_pages

ldflags-y += --wrap=insert_resource

ldflags-y += --wrap=remove_resource

ldflags-y += --wrap=acpi_evaluate_object



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

NVDIMM_SRC := $(DRIVERS)/nvdimm

tools/testing/nvdimm/test/iomap.c

+17 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/module.h>

#include <linux/types.h>

#include <linux/pfn_t.h>

#include <linux/acpi.h>

#include <linux/io.h>

#include <linux/mm.h>

#include "nfit_test.h"
@@ -276,4 +277,20 @@ void __wrap___devm_release_region(struct device *dev, struct resource *parent, 
}

EXPORT_SYMBOL(__wrap___devm_release_region);



acpi_status __wrap_acpi_evaluate_object(acpi_handle handle, acpi_string path,

		struct acpi_object_list *p, struct acpi_buffer *buf)

{

	struct nfit_test_resource *nfit_res = get_nfit_res((long) handle);

	union acpi_object **obj;



	if (!nfit_res || strcmp(path, "_FIT") || !buf)

		return acpi_evaluate_object(handle, path, p, buf);



	obj = nfit_res->buf;

	buf->length = sizeof(union acpi_object);

	buf->pointer = *obj;

	return AE_OK;

}

EXPORT_SYMBOL(__wrap_acpi_evaluate_object);



MODULE_LICENSE("GPL v2");

tools/testing/nvdimm/test/nfit.c

+15 −6
Original line number Diff line number Diff line
@@ -154,6 +154,8 @@ struct nfit_test { 
	int (*alloc)(struct nfit_test *t);

	void (*setup)(struct nfit_test *t);

	int setup_hotplug;

	union acpi_object **_fit;

	dma_addr_t _fit_dma;

	struct ars_state {

		struct nd_cmd_ars_status *ars_status;

		unsigned long deadline;
@@ -615,6 +617,10 @@ static int nfit_test0_alloc(struct nfit_test *t) 
			return -ENOMEM;

	}



	t->_fit = test_alloc(t, sizeof(union acpi_object **), &t->_fit_dma);

	if (!t->_fit)

		return -ENOMEM;



	return ars_state_init(&t->pdev.dev, &t->ars_state);

}
@@ -1408,6 +1414,7 @@ static int nfit_test_probe(struct platform_device *pdev) 
	struct acpi_nfit_desc *acpi_desc;

	struct device *dev = &pdev->dev;

	struct nfit_test *nfit_test;

	union acpi_object *obj;

	int rc;



	nfit_test = to_nfit_test(&pdev->dev);
@@ -1475,15 +1482,17 @@ static int nfit_test_probe(struct platform_device *pdev) 
	if (nfit_test->setup != nfit_test0_setup)

		return 0;



	flush_work(&acpi_desc->work);

	nfit_test->setup_hotplug = 1;

	nfit_test->setup(nfit_test);



	rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_buf,

			nfit_test->nfit_size);

	if (rc)

		return rc;



	obj = kzalloc(sizeof(*obj), GFP_KERNEL);

	if (!obj)

		return -ENOMEM;

	obj->type = ACPI_TYPE_BUFFER;

	obj->buffer.length = nfit_test->nfit_size;

	obj->buffer.pointer = nfit_test->nfit_buf;

	*(nfit_test->_fit) = obj;

	__acpi_nfit_notify(&pdev->dev, nfit_test, 0x80);

	return 0;

}