tools/testing/nvdimm: support for sub-dividing a pmem region
Update nfit_test to handle multiple sub-allocations within a given pmem region. The mock resource now tracks and un-tracks sub-ranges as they are requested and released (either explicitly or via devm callback). Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Родитель
8a5f50d3b7
Коммит
bd4cd745b3
|
@ -74,7 +74,7 @@ void __iomem *__nfit_test_ioremap(resource_size_t offset, unsigned long size,
|
|||
|
||||
if (nfit_res)
|
||||
return (void __iomem *) nfit_res->buf + offset
|
||||
- nfit_res->res->start;
|
||||
- nfit_res->res.start;
|
||||
return fallback_fn(offset, size);
|
||||
}
|
||||
|
||||
|
@ -85,7 +85,7 @@ void __iomem *__wrap_devm_ioremap_nocache(struct device *dev,
|
|||
|
||||
if (nfit_res)
|
||||
return (void __iomem *) nfit_res->buf + offset
|
||||
- nfit_res->res->start;
|
||||
- nfit_res->res.start;
|
||||
return devm_ioremap_nocache(dev, offset, size);
|
||||
}
|
||||
EXPORT_SYMBOL(__wrap_devm_ioremap_nocache);
|
||||
|
@ -96,7 +96,7 @@ void *__wrap_devm_memremap(struct device *dev, resource_size_t offset,
|
|||
struct nfit_test_resource *nfit_res = get_nfit_res(offset);
|
||||
|
||||
if (nfit_res)
|
||||
return nfit_res->buf + offset - nfit_res->res->start;
|
||||
return nfit_res->buf + offset - nfit_res->res.start;
|
||||
return devm_memremap(dev, offset, size, flags);
|
||||
}
|
||||
EXPORT_SYMBOL(__wrap_devm_memremap);
|
||||
|
@ -108,7 +108,7 @@ void *__wrap_devm_memremap_pages(struct device *dev, struct resource *res,
|
|||
struct nfit_test_resource *nfit_res = get_nfit_res(offset);
|
||||
|
||||
if (nfit_res)
|
||||
return nfit_res->buf + offset - nfit_res->res->start;
|
||||
return nfit_res->buf + offset - nfit_res->res.start;
|
||||
return devm_memremap_pages(dev, res, ref, altmap);
|
||||
}
|
||||
EXPORT_SYMBOL(__wrap_devm_memremap_pages);
|
||||
|
@ -129,7 +129,7 @@ void *__wrap_memremap(resource_size_t offset, size_t size,
|
|||
struct nfit_test_resource *nfit_res = get_nfit_res(offset);
|
||||
|
||||
if (nfit_res)
|
||||
return nfit_res->buf + offset - nfit_res->res->start;
|
||||
return nfit_res->buf + offset - nfit_res->res.start;
|
||||
return memremap(offset, size, flags);
|
||||
}
|
||||
EXPORT_SYMBOL(__wrap_memremap);
|
||||
|
@ -175,6 +175,63 @@ void __wrap_memunmap(void *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)
|
||||
|
@ -184,21 +241,57 @@ static struct resource *nfit_test_request_region(struct device *dev,
|
|||
if (parent == &iomem_resource) {
|
||||
nfit_res = get_nfit_res(start);
|
||||
if (nfit_res) {
|
||||
struct resource *res = nfit_res->res + 1;
|
||||
struct nfit_test_request *req;
|
||||
struct resource *res = NULL;
|
||||
|
||||
if (start + n > nfit_res->res->start
|
||||
+ resource_size(nfit_res->res)) {
|
||||
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);
|
||||
&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;
|
||||
}
|
||||
|
@ -242,29 +335,10 @@ struct resource *__wrap___devm_request_region(struct device *dev,
|
|||
}
|
||||
EXPORT_SYMBOL(__wrap___devm_request_region);
|
||||
|
||||
static bool nfit_test_release_region(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 resource *res = nfit_res->res + 1;
|
||||
|
||||
if (start != res->start || resource_size(res) != n)
|
||||
pr_info("%s: start: %llx n: %llx mismatch: %pr\n",
|
||||
__func__, start, n, res);
|
||||
else
|
||||
memset(res, 0, sizeof(*res));
|
||||
return true;
|
||||
}
|
||||
}
|
||||
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))
|
||||
if (!nfit_test_release_region(NULL, parent, start, n))
|
||||
__release_region(parent, start, n);
|
||||
}
|
||||
EXPORT_SYMBOL(__wrap___release_region);
|
||||
|
@ -272,7 +346,7 @@ 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))
|
||||
if (!nfit_test_release_region(dev, parent, start, n))
|
||||
__devm_release_region(dev, parent, start, n);
|
||||
}
|
||||
EXPORT_SYMBOL(__wrap___devm_release_region);
|
||||
|
|
|
@ -478,14 +478,12 @@ static struct nfit_test *instances[NUM_NFITS];
|
|||
static void release_nfit_res(void *data)
|
||||
{
|
||||
struct nfit_test_resource *nfit_res = data;
|
||||
struct resource *res = nfit_res->res;
|
||||
|
||||
spin_lock(&nfit_test_lock);
|
||||
list_del(&nfit_res->list);
|
||||
spin_unlock(&nfit_test_lock);
|
||||
|
||||
vfree(nfit_res->buf);
|
||||
kfree(res);
|
||||
kfree(nfit_res);
|
||||
}
|
||||
|
||||
|
@ -493,12 +491,11 @@ static void *__test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma,
|
|||
void *buf)
|
||||
{
|
||||
struct device *dev = &t->pdev.dev;
|
||||
struct resource *res = kzalloc(sizeof(*res) * 2, GFP_KERNEL);
|
||||
struct nfit_test_resource *nfit_res = kzalloc(sizeof(*nfit_res),
|
||||
GFP_KERNEL);
|
||||
int rc;
|
||||
|
||||
if (!res || !buf || !nfit_res)
|
||||
if (!buf || !nfit_res)
|
||||
goto err;
|
||||
rc = devm_add_action(dev, release_nfit_res, nfit_res);
|
||||
if (rc)
|
||||
|
@ -507,10 +504,11 @@ static void *__test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma,
|
|||
memset(buf, 0, size);
|
||||
nfit_res->dev = dev;
|
||||
nfit_res->buf = buf;
|
||||
nfit_res->res = res;
|
||||
res->start = *dma;
|
||||
res->end = *dma + size - 1;
|
||||
res->name = "NFIT";
|
||||
nfit_res->res.start = *dma;
|
||||
nfit_res->res.end = *dma + size - 1;
|
||||
nfit_res->res.name = "NFIT";
|
||||
spin_lock_init(&nfit_res->lock);
|
||||
INIT_LIST_HEAD(&nfit_res->requests);
|
||||
spin_lock(&nfit_test_lock);
|
||||
list_add(&nfit_res->list, &t->resources);
|
||||
spin_unlock(&nfit_test_lock);
|
||||
|
@ -519,7 +517,6 @@ static void *__test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma,
|
|||
err:
|
||||
if (buf)
|
||||
vfree(buf);
|
||||
kfree(res);
|
||||
kfree(nfit_res);
|
||||
return NULL;
|
||||
}
|
||||
|
@ -544,13 +541,13 @@ static struct nfit_test_resource *nfit_test_lookup(resource_size_t addr)
|
|||
continue;
|
||||
spin_lock(&nfit_test_lock);
|
||||
list_for_each_entry(n, &t->resources, list) {
|
||||
if (addr >= n->res->start && (addr < n->res->start
|
||||
+ resource_size(n->res))) {
|
||||
if (addr >= n->res.start && (addr < n->res.start
|
||||
+ resource_size(&n->res))) {
|
||||
nfit_res = n;
|
||||
break;
|
||||
} else if (addr >= (unsigned long) n->buf
|
||||
&& (addr < (unsigned long) n->buf
|
||||
+ resource_size(n->res))) {
|
||||
+ resource_size(&n->res))) {
|
||||
nfit_res = n;
|
||||
break;
|
||||
}
|
||||
|
|
|
@ -13,11 +13,21 @@
|
|||
#ifndef __NFIT_TEST_H__
|
||||
#define __NFIT_TEST_H__
|
||||
#include <linux/list.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/spinlock_types.h>
|
||||
|
||||
struct nfit_test_request {
|
||||
struct list_head list;
|
||||
struct resource res;
|
||||
};
|
||||
|
||||
struct nfit_test_resource {
|
||||
struct list_head requests;
|
||||
struct list_head list;
|
||||
struct resource *res;
|
||||
struct resource res;
|
||||
struct device *dev;
|
||||
spinlock_t lock;
|
||||
int req_count;
|
||||
void *buf;
|
||||
};
|
||||
|
||||
|
|
Загрузка…
Ссылка в новой задаче