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Date: Tue, 23 Aug 2016 14:54:17 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: linux-nvdimm@...ts.01.org
Cc: Vishal Verma <vishal.l.verma@...el.com>,
linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: [PATCH 1/3] 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@...el.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
drivers/acpi/nfit/core.c | 25 ++++++++++++++-----------
drivers/acpi/nfit/nfit.h | 1 +
tools/testing/nvdimm/Kbuild | 1 +
tools/testing/nvdimm/test/iomap.c | 17 +++++++++++++++++
tools/testing/nvdimm/test/nfit.c | 21 +++++++++++++++------
5 files changed, 48 insertions(+), 17 deletions(-)
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 4a363bed89b3..8120e8218f93 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -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[] = {
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
index 51d23f130d86..52370347fb0e 100644
--- a/drivers/acpi/nfit/nfit.h
+++ b/drivers/acpi/nfit/nfit.h
@@ -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__ */
diff --git a/tools/testing/nvdimm/Kbuild b/tools/testing/nvdimm/Kbuild
index ad6dd0543019..582db95127ed 100644
--- a/tools/testing/nvdimm/Kbuild
+++ b/tools/testing/nvdimm/Kbuild
@@ -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
diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
index c29f8dca9e67..dae5b9b6d186 100644
--- a/tools/testing/nvdimm/test/iomap.c
+++ b/tools/testing/nvdimm/test/iomap.c
@@ -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");
diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index dd48f421844c..8d79c75d3cae 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -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;
}
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