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Message-ID: <146698273882.40036.13111380618579073873.stgit@dwillia2-desk3.amr.corp.intel.com>
Date: Sun, 26 Jun 2016 16:12:18 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: linux-nvdimm@...ts.01.org
Cc: ross.zwisler@...ux.intel.com, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] tools/testing/nvdimm: replace CONFIG_DMA_CMA dependency
with vmalloc()
DMA_CMA is incompatible with SWIOTLB used in enterprise distro
configurations. Switch to vmalloc() allocations for all resources.
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
tools/testing/nvdimm/Kbuild | 2 ++
tools/testing/nvdimm/pmem-dax.c | 22 +++++++++++++----
tools/testing/nvdimm/test/iomap.c | 16 ++++++++++++
tools/testing/nvdimm/test/nfit.c | 48 +++++--------------------------------
4 files changed, 41 insertions(+), 47 deletions(-)
diff --git a/tools/testing/nvdimm/Kbuild b/tools/testing/nvdimm/Kbuild
index 4adfa9cdf26f..62d5ac3c988e 100644
--- a/tools/testing/nvdimm/Kbuild
+++ b/tools/testing/nvdimm/Kbuild
@@ -11,6 +11,8 @@ ldflags-y += --wrap=__devm_release_region
ldflags-y += --wrap=__request_region
ldflags-y += --wrap=__release_region
ldflags-y += --wrap=devm_memremap_pages
+ldflags-y += --wrap=insert_resource
+ldflags-y += --wrap=remove_resource
DRIVERS := ../../../drivers
NVDIMM_SRC := $(DRIVERS)/nvdimm
diff --git a/tools/testing/nvdimm/pmem-dax.c b/tools/testing/nvdimm/pmem-dax.c
index fdba77f2bb06..1e0218ce6a8b 100644
--- a/tools/testing/nvdimm/pmem-dax.c
+++ b/tools/testing/nvdimm/pmem-dax.c
@@ -21,14 +21,26 @@ long pmem_direct_access(struct block_device *bdev, sector_t sector,
struct pmem_device *pmem = bdev->bd_queue->queuedata;
resource_size_t offset = sector * 512 + pmem->data_offset;
- /* disable DAX for nfit_test pmem devices */
- if (get_nfit_res(pmem->phys_addr + offset)) {
- dev_info_once(pmem->bb.dev, "dax is disabled for nfit_test\n");
+ if (unlikely(is_bad_pmem(&pmem->bb, sector, size)))
return -EIO;
+
+ /*
+ * Limit dax to a single page at a time given vmalloc()-backed
+ * in the nfit_test case.
+ */
+ if (get_nfit_res(pmem->phys_addr + offset)) {
+ struct page *page;
+
+ *kaddr = pmem->virt_addr + offset;
+ page = vmalloc_to_page(pmem->virt_addr + offset);
+ *pfn = page_to_pfn_t(page);
+ dev_dbg_ratelimited(disk_to_dev(bdev->bd_disk)->parent,
+ "%s: sector: %#llx pfn: %#lx\n", __func__,
+ (unsigned long long) sector, page_to_pfn(page));
+
+ return PAGE_SIZE;
}
- if (unlikely(is_bad_pmem(&pmem->bb, sector, size)))
- return -EIO;
*kaddr = pmem->virt_addr + offset;
*pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags);
diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
index 9966f093b4ff..804705f0f3a1 100644
--- a/tools/testing/nvdimm/test/iomap.c
+++ b/tools/testing/nvdimm/test/iomap.c
@@ -230,6 +230,22 @@ struct resource *__wrap___request_region(struct resource *parent,
}
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)
diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index c919866853a0..4fdd139f6e6c 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -470,11 +470,7 @@ static void release_nfit_res(void *data)
list_del(&nfit_res->list);
spin_unlock(&nfit_test_lock);
- if (is_vmalloc_addr(nfit_res->buf))
- vfree(nfit_res->buf);
- else
- dma_free_coherent(nfit_res->dev, resource_size(res),
- nfit_res->buf, res->start);
+ vfree(nfit_res->buf);
kfree(res);
kfree(nfit_res);
}
@@ -507,9 +503,7 @@ static void *__test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma,
return nfit_res->buf;
err:
- if (buf && !is_vmalloc_addr(buf))
- dma_free_coherent(dev, size, buf, *dma);
- else if (buf)
+ if (buf)
vfree(buf);
kfree(res);
kfree(nfit_res);
@@ -524,15 +518,6 @@ static void *test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma)
return __test_alloc(t, size, dma, buf);
}
-static void *test_alloc_coherent(struct nfit_test *t, size_t size,
- dma_addr_t *dma)
-{
- struct device *dev = &t->pdev.dev;
- void *buf = dma_alloc_coherent(dev, size, dma, GFP_KERNEL);
-
- return __test_alloc(t, size, dma, buf);
-}
-
static struct nfit_test_resource *nfit_test_lookup(resource_size_t addr)
{
int i;
@@ -592,15 +577,15 @@ static int nfit_test0_alloc(struct nfit_test *t)
return -ENOMEM;
t->nfit_size = nfit_size;
- t->spa_set[0] = test_alloc_coherent(t, SPA0_SIZE, &t->spa_set_dma[0]);
+ t->spa_set[0] = test_alloc(t, SPA0_SIZE, &t->spa_set_dma[0]);
if (!t->spa_set[0])
return -ENOMEM;
- t->spa_set[1] = test_alloc_coherent(t, SPA1_SIZE, &t->spa_set_dma[1]);
+ t->spa_set[1] = test_alloc(t, SPA1_SIZE, &t->spa_set_dma[1]);
if (!t->spa_set[1])
return -ENOMEM;
- t->spa_set[2] = test_alloc_coherent(t, SPA0_SIZE, &t->spa_set_dma[2]);
+ t->spa_set[2] = test_alloc(t, SPA0_SIZE, &t->spa_set_dma[2]);
if (!t->spa_set[2])
return -ENOMEM;
@@ -639,7 +624,7 @@ static int nfit_test1_alloc(struct nfit_test *t)
return -ENOMEM;
t->nfit_size = nfit_size;
- t->spa_set[0] = test_alloc_coherent(t, SPA2_SIZE, &t->spa_set_dma[0]);
+ t->spa_set[0] = test_alloc(t, SPA2_SIZE, &t->spa_set_dma[0]);
if (!t->spa_set[0])
return -ENOMEM;
@@ -1523,12 +1508,6 @@ static struct platform_driver nfit_test_driver = {
.id_table = nfit_test_id,
};
-#ifdef CONFIG_CMA_SIZE_MBYTES
-#define CMA_SIZE_MBYTES CONFIG_CMA_SIZE_MBYTES
-#else
-#define CMA_SIZE_MBYTES 0
-#endif
-
static __init int nfit_test_init(void)
{
int rc, i;
@@ -1538,7 +1517,6 @@ static __init int nfit_test_init(void)
for (i = 0; i < NUM_NFITS; i++) {
struct nfit_test *nfit_test;
struct platform_device *pdev;
- static int once;
nfit_test = kzalloc(sizeof(*nfit_test), GFP_KERNEL);
if (!nfit_test) {
@@ -1577,20 +1555,6 @@ static __init int nfit_test_init(void)
goto err_register;
instances[i] = nfit_test;
-
- if (!once++) {
- dma_addr_t dma;
- void *buf;
-
- buf = dma_alloc_coherent(&pdev->dev, SZ_128M, &dma,
- GFP_KERNEL);
- if (!buf) {
- rc = -ENOMEM;
- dev_warn(&pdev->dev, "need 128M of free cma\n");
- goto err_register;
- }
- dma_free_coherent(&pdev->dev, SZ_128M, buf, dma);
- }
}
rc = platform_driver_register(&nfit_test_driver);
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