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-rw-r--r--tools/testing/nvdimm/test/iomap.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
new file mode 100644
index 0000000000..ea956082e6
--- /dev/null
+++ b/tools/testing/nvdimm/test/iomap.c
@@ -0,0 +1,410 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
+ */
+#include <linux/memremap.h>
+#include <linux/rculist.h>
+#include <linux/export.h>
+#include <linux/ioport.h>
+#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"
+
+static LIST_HEAD(iomap_head);
+
+static struct iomap_ops {
+ nfit_test_lookup_fn nfit_test_lookup;
+ nfit_test_evaluate_dsm_fn evaluate_dsm;
+ struct list_head list;
+} iomap_ops = {
+ .list = LIST_HEAD_INIT(iomap_ops.list),
+};
+
+void nfit_test_setup(nfit_test_lookup_fn lookup,
+ nfit_test_evaluate_dsm_fn evaluate)
+{
+ iomap_ops.nfit_test_lookup = lookup;
+ iomap_ops.evaluate_dsm = evaluate;
+ list_add_rcu(&iomap_ops.list, &iomap_head);
+}
+EXPORT_SYMBOL(nfit_test_setup);
+
+void nfit_test_teardown(void)
+{
+ list_del_rcu(&iomap_ops.list);
+ synchronize_rcu();
+}
+EXPORT_SYMBOL(nfit_test_teardown);
+
+static struct nfit_test_resource *__get_nfit_res(resource_size_t resource)
+{
+ struct iomap_ops *ops;
+
+ ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
+ if (ops)
+ return ops->nfit_test_lookup(resource);
+ return NULL;
+}
+
+struct nfit_test_resource *get_nfit_res(resource_size_t resource)
+{
+ struct nfit_test_resource *res;
+
+ rcu_read_lock();
+ res = __get_nfit_res(resource);
+ rcu_read_unlock();
+
+ return res;
+}
+EXPORT_SYMBOL(get_nfit_res);
+
+#define __nfit_test_ioremap(offset, size, fallback_fn) ({ \
+ struct nfit_test_resource *nfit_res = get_nfit_res(offset); \
+ nfit_res ? \
+ (void __iomem *) nfit_res->buf + (offset) \
+ - nfit_res->res.start \
+ : \
+ fallback_fn((offset), (size)) ; \
+})
+
+void __iomem *__wrap_devm_ioremap(struct device *dev,
+ resource_size_t offset, unsigned long size)
+{
+ struct nfit_test_resource *nfit_res = get_nfit_res(offset);
+
+ if (nfit_res)
+ return (void __iomem *) nfit_res->buf + offset
+ - nfit_res->res.start;
+ return devm_ioremap(dev, offset, size);
+}
+EXPORT_SYMBOL(__wrap_devm_ioremap);
+
+void *__wrap_devm_memremap(struct device *dev, resource_size_t offset,
+ size_t size, unsigned long flags)
+{
+ struct nfit_test_resource *nfit_res = get_nfit_res(offset);
+
+ if (nfit_res)
+ return nfit_res->buf + offset - nfit_res->res.start;
+ return devm_memremap(dev, offset, size, flags);
+}
+EXPORT_SYMBOL(__wrap_devm_memremap);
+
+static void nfit_test_kill(void *_pgmap)
+{
+ struct dev_pagemap *pgmap = _pgmap;
+
+ WARN_ON(!pgmap);
+
+ percpu_ref_kill(&pgmap->ref);
+
+ wait_for_completion(&pgmap->done);
+ percpu_ref_exit(&pgmap->ref);
+}
+
+static void dev_pagemap_percpu_release(struct percpu_ref *ref)
+{
+ struct dev_pagemap *pgmap = container_of(ref, struct dev_pagemap, ref);
+
+ complete(&pgmap->done);
+}
+
+void *__wrap_devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
+{
+ int error;
+ resource_size_t offset = pgmap->range.start;
+ struct nfit_test_resource *nfit_res = get_nfit_res(offset);
+
+ if (!nfit_res)
+ return devm_memremap_pages(dev, pgmap);
+
+ init_completion(&pgmap->done);
+ error = percpu_ref_init(&pgmap->ref, dev_pagemap_percpu_release, 0,
+ GFP_KERNEL);
+ if (error)
+ return ERR_PTR(error);
+
+ error = devm_add_action_or_reset(dev, nfit_test_kill, pgmap);
+ if (error)
+ return ERR_PTR(error);
+ return nfit_res->buf + offset - nfit_res->res.start;
+}
+EXPORT_SYMBOL_GPL(__wrap_devm_memremap_pages);
+
+pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
+{
+ struct nfit_test_resource *nfit_res = get_nfit_res(addr);
+
+ if (nfit_res)
+ flags &= ~PFN_MAP;
+ return phys_to_pfn_t(addr, flags);
+}
+EXPORT_SYMBOL(__wrap_phys_to_pfn_t);
+
+void *__wrap_memremap(resource_size_t offset, size_t size,
+ unsigned long flags)
+{
+ struct nfit_test_resource *nfit_res = get_nfit_res(offset);
+
+ if (nfit_res)
+ return nfit_res->buf + offset - nfit_res->res.start;
+ return memremap(offset, size, flags);
+}
+EXPORT_SYMBOL(__wrap_memremap);
+
+void __wrap_devm_memunmap(struct device *dev, void *addr)
+{
+ struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
+
+ if (nfit_res)
+ return;
+ return devm_memunmap(dev, addr);
+}
+EXPORT_SYMBOL(__wrap_devm_memunmap);
+
+void __iomem *__wrap_ioremap(resource_size_t offset, unsigned long size)
+{
+ return __nfit_test_ioremap(offset, size, ioremap);
+}
+EXPORT_SYMBOL(__wrap_ioremap);
+
+void __iomem *__wrap_ioremap_wc(resource_size_t offset, unsigned long size)
+{
+ return __nfit_test_ioremap(offset, size, ioremap_wc);
+}
+EXPORT_SYMBOL(__wrap_ioremap_wc);
+
+void __wrap_iounmap(volatile void __iomem *addr)
+{
+ struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
+ if (nfit_res)
+ return;
+ return iounmap(addr);
+}
+EXPORT_SYMBOL(__wrap_iounmap);
+
+void __wrap_memunmap(void *addr)
+{
+ struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
+
+ if (nfit_res)
+ return;
+ return memunmap(addr);
+}
+EXPORT_SYMBOL(__wrap_memunmap);
+
+static bool nfit_test_release_region(struct device *dev,
+ struct resource *parent, resource_size_t start,
+ resource_size_t n);
+
+static void nfit_devres_release(struct device *dev, void *data)
+{
+ struct resource *res = *((struct resource **) data);
+
+ WARN_ON(!nfit_test_release_region(NULL, &iomem_resource, res->start,
+ resource_size(res)));
+}
+
+static int match(struct device *dev, void *__res, void *match_data)
+{
+ struct resource *res = *((struct resource **) __res);
+ resource_size_t start = *((resource_size_t *) match_data);
+
+ return res->start == start;
+}
+
+static bool nfit_test_release_region(struct device *dev,
+ struct resource *parent, resource_size_t start,
+ resource_size_t n)
+{
+ if (parent == &iomem_resource) {
+ struct nfit_test_resource *nfit_res = get_nfit_res(start);
+
+ if (nfit_res) {
+ struct nfit_test_request *req;
+ struct resource *res = NULL;
+
+ if (dev) {
+ devres_release(dev, nfit_devres_release, match,
+ &start);
+ return true;
+ }
+
+ spin_lock(&nfit_res->lock);
+ list_for_each_entry(req, &nfit_res->requests, list)
+ if (req->res.start == start) {
+ res = &req->res;
+ list_del(&req->list);
+ break;
+ }
+ spin_unlock(&nfit_res->lock);
+
+ WARN(!res || resource_size(res) != n,
+ "%s: start: %llx n: %llx mismatch: %pr\n",
+ __func__, start, n, res);
+ if (res)
+ kfree(req);
+ return true;
+ }
+ }
+ return false;
+}
+
+static struct resource *nfit_test_request_region(struct device *dev,
+ struct resource *parent, resource_size_t start,
+ resource_size_t n, const char *name, int flags)
+{
+ struct nfit_test_resource *nfit_res;
+
+ if (parent == &iomem_resource) {
+ nfit_res = get_nfit_res(start);
+ if (nfit_res) {
+ struct nfit_test_request *req;
+ struct resource *res = NULL;
+
+ if (start + n > nfit_res->res.start
+ + resource_size(&nfit_res->res)) {
+ pr_debug("%s: start: %llx n: %llx overflow: %pr\n",
+ __func__, start, n,
+ &nfit_res->res);
+ return NULL;
+ }
+
+ spin_lock(&nfit_res->lock);
+ list_for_each_entry(req, &nfit_res->requests, list)
+ if (start == req->res.start) {
+ res = &req->res;
+ break;
+ }
+ spin_unlock(&nfit_res->lock);
+
+ if (res) {
+ WARN(1, "%pr already busy\n", res);
+ return NULL;
+ }
+
+ req = kzalloc(sizeof(*req), GFP_KERNEL);
+ if (!req)
+ return NULL;
+ INIT_LIST_HEAD(&req->list);
+ res = &req->res;
+
+ res->start = start;
+ res->end = start + n - 1;
+ res->name = name;
+ res->flags = resource_type(parent);
+ res->flags |= IORESOURCE_BUSY | flags;
+ spin_lock(&nfit_res->lock);
+ list_add(&req->list, &nfit_res->requests);
+ spin_unlock(&nfit_res->lock);
+
+ if (dev) {
+ struct resource **d;
+
+ d = devres_alloc(nfit_devres_release,
+ sizeof(struct resource *),
+ GFP_KERNEL);
+ if (!d)
+ return NULL;
+ *d = res;
+ devres_add(dev, d);
+ }
+
+ pr_debug("%s: %pr\n", __func__, res);
+ return res;
+ }
+ }
+ if (dev)
+ return __devm_request_region(dev, parent, start, n, name);
+ return __request_region(parent, start, n, name, flags);
+}
+
+struct resource *__wrap___request_region(struct resource *parent,
+ resource_size_t start, resource_size_t n, const char *name,
+ int flags)
+{
+ return nfit_test_request_region(NULL, parent, start, n, name, flags);
+}
+EXPORT_SYMBOL(__wrap___request_region);
+
+int __wrap_insert_resource(struct resource *parent, struct resource *res)
+{
+ if (get_nfit_res(res->start))
+ return 0;
+ return insert_resource(parent, res);
+}
+EXPORT_SYMBOL(__wrap_insert_resource);
+
+int __wrap_remove_resource(struct resource *res)
+{
+ if (get_nfit_res(res->start))
+ return 0;
+ return remove_resource(res);
+}
+EXPORT_SYMBOL(__wrap_remove_resource);
+
+struct resource *__wrap___devm_request_region(struct device *dev,
+ struct resource *parent, resource_size_t start,
+ resource_size_t n, const char *name)
+{
+ if (!dev)
+ return NULL;
+ return nfit_test_request_region(dev, parent, start, n, name, 0);
+}
+EXPORT_SYMBOL(__wrap___devm_request_region);
+
+void __wrap___release_region(struct resource *parent, resource_size_t start,
+ resource_size_t n)
+{
+ if (!nfit_test_release_region(NULL, 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(dev, parent, start, n))
+ __devm_release_region(dev, parent, start, n);
+}
+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);
+
+union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
+ u64 rev, u64 func, union acpi_object *argv4)
+{
+ union acpi_object *obj = ERR_PTR(-ENXIO);
+ struct iomap_ops *ops;
+
+ rcu_read_lock();
+ ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
+ if (ops)
+ obj = ops->evaluate_dsm(handle, guid, rev, func, argv4);
+ rcu_read_unlock();
+
+ if (IS_ERR(obj))
+ return acpi_evaluate_dsm(handle, guid, rev, func, argv4);
+ return obj;
+}
+EXPORT_SYMBOL(__wrap_acpi_evaluate_dsm);
+
+MODULE_LICENSE("GPL v2");