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-rw-r--r--drivers/nvdimm/bus.c19
-rw-r--r--drivers/nvdimm/e820.c41
-rw-r--r--drivers/nvdimm/pfn_devs.c2
-rw-r--r--drivers/nvdimm/pmem.c46
-rw-r--r--drivers/nvdimm/region_devs.c3
5 files changed, 73 insertions, 38 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index a64023690cad..27902a8799b1 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -100,6 +100,9 @@ static int nvdimm_bus_probe(struct device *dev)
if (!try_module_get(provider))
return -ENXIO;
+ dev_dbg(&nvdimm_bus->dev, "START: %s.probe(%s)\n",
+ dev->driver->name, dev_name(dev));
+
nvdimm_bus_probe_start(nvdimm_bus);
rc = nd_drv->probe(dev);
if (rc == 0)
@@ -108,7 +111,7 @@ static int nvdimm_bus_probe(struct device *dev)
nd_region_disable(nvdimm_bus, dev);
nvdimm_bus_probe_end(nvdimm_bus);
- dev_dbg(&nvdimm_bus->dev, "%s.probe(%s) = %d\n", dev->driver->name,
+ dev_dbg(&nvdimm_bus->dev, "END: %s.probe(%s) = %d\n", dev->driver->name,
dev_name(dev), rc);
if (rc != 0)
@@ -566,14 +569,18 @@ int nvdimm_revalidate_disk(struct gendisk *disk)
{
struct device *dev = disk_to_dev(disk)->parent;
struct nd_region *nd_region = to_nd_region(dev->parent);
- const char *pol = nd_region->ro ? "only" : "write";
+ int disk_ro = get_disk_ro(disk);
- if (nd_region->ro == get_disk_ro(disk))
+ /*
+ * Upgrade to read-only if the region is read-only preserve as
+ * read-only if the disk is already read-only.
+ */
+ if (disk_ro || nd_region->ro == disk_ro)
return 0;
- dev_info(dev, "%s read-%s, marking %s read-%s\n",
- dev_name(&nd_region->dev), pol, disk->disk_name, pol);
- set_disk_ro(disk, nd_region->ro);
+ dev_info(dev, "%s read-only, marking %s read-only\n",
+ dev_name(&nd_region->dev), disk->disk_name);
+ set_disk_ro(disk, 1);
return 0;
diff --git a/drivers/nvdimm/e820.c b/drivers/nvdimm/e820.c
index 6f9a6ffd7cde..521eaf53a52a 100644
--- a/drivers/nvdimm/e820.c
+++ b/drivers/nvdimm/e820.c
@@ -38,12 +38,27 @@ static int e820_range_to_nid(resource_size_t addr)
}
#endif
+static int e820_register_one(struct resource *res, void *data)
+{
+ struct nd_region_desc ndr_desc;
+ struct nvdimm_bus *nvdimm_bus = data;
+
+ memset(&ndr_desc, 0, sizeof(ndr_desc));
+ ndr_desc.res = res;
+ ndr_desc.attr_groups = e820_pmem_region_attribute_groups;
+ ndr_desc.numa_node = e820_range_to_nid(res->start);
+ set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);
+ if (!nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc))
+ return -ENXIO;
+ return 0;
+}
+
static int e820_pmem_probe(struct platform_device *pdev)
{
static struct nvdimm_bus_descriptor nd_desc;
struct device *dev = &pdev->dev;
struct nvdimm_bus *nvdimm_bus;
- struct resource *p;
+ int rc = -ENXIO;
nd_desc.attr_groups = e820_pmem_attribute_groups;
nd_desc.provider_name = "e820";
@@ -53,27 +68,15 @@ static int e820_pmem_probe(struct platform_device *pdev)
goto err;
platform_set_drvdata(pdev, nvdimm_bus);
- for (p = iomem_resource.child; p ; p = p->sibling) {
- struct nd_region_desc ndr_desc;
-
- if (p->desc != IORES_DESC_PERSISTENT_MEMORY_LEGACY)
- continue;
-
- memset(&ndr_desc, 0, sizeof(ndr_desc));
- ndr_desc.res = p;
- ndr_desc.attr_groups = e820_pmem_region_attribute_groups;
- ndr_desc.numa_node = e820_range_to_nid(p->start);
- set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);
- if (!nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc))
- goto err;
- }
-
+ rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY,
+ IORESOURCE_MEM, 0, -1, nvdimm_bus, e820_register_one);
+ if (rc)
+ goto err;
return 0;
-
- err:
+err:
nvdimm_bus_unregister(nvdimm_bus);
dev_err(dev, "failed to register legacy persistent memory ranges\n");
- return -ENXIO;
+ return rc;
}
static struct platform_driver e820_pmem_driver = {
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index 30b08791597d..3f7ad5bc443e 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -561,8 +561,6 @@ static int __nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap)
res->start += start_pad;
res->end -= end_trunc;
- pgmap->type = MEMORY_DEVICE_HOST;
-
if (nd_pfn->mode == PFN_MODE_RAM) {
if (offset < SZ_8K)
return -EINVAL;
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index e023d6aa22b5..68940356cad3 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -164,11 +164,6 @@ static blk_status_t pmem_do_bvec(struct pmem_device *pmem, struct page *page,
return rc;
}
-/* account for REQ_FLUSH rename, replace with REQ_PREFLUSH after v4.8-rc1 */
-#ifndef REQ_FLUSH
-#define REQ_FLUSH REQ_PREFLUSH
-#endif
-
static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
{
blk_status_t rc = 0;
@@ -179,7 +174,7 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
struct pmem_device *pmem = q->queuedata;
struct nd_region *nd_region = to_region(pmem);
- if (bio->bi_opf & REQ_FLUSH)
+ if (bio->bi_opf & REQ_PREFLUSH)
nvdimm_flush(nd_region);
do_acct = nd_iostat_start(bio, &start);
@@ -264,9 +259,16 @@ static size_t pmem_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff,
return copy_from_iter_flushcache(addr, bytes, i);
}
+static size_t pmem_copy_to_iter(struct dax_device *dax_dev, pgoff_t pgoff,
+ void *addr, size_t bytes, struct iov_iter *i)
+{
+ return copy_to_iter_mcsafe(addr, bytes, i);
+}
+
static const struct dax_operations pmem_dax_ops = {
.direct_access = pmem_dax_direct_access,
.copy_from_iter = pmem_copy_from_iter,
+ .copy_to_iter = pmem_copy_to_iter,
};
static const struct attribute_group *pmem_attribute_groups[] = {
@@ -294,12 +296,33 @@ static void pmem_release_disk(void *__pmem)
put_disk(pmem->disk);
}
+static void pmem_release_pgmap_ops(void *__pgmap)
+{
+ dev_pagemap_put_ops();
+}
+
+static void fsdax_pagefree(struct page *page, void *data)
+{
+ wake_up_var(&page->_refcount);
+}
+
+static int setup_pagemap_fsdax(struct device *dev, struct dev_pagemap *pgmap)
+{
+ dev_pagemap_get_ops();
+ if (devm_add_action_or_reset(dev, pmem_release_pgmap_ops, pgmap))
+ return -ENOMEM;
+ pgmap->type = MEMORY_DEVICE_FS_DAX;
+ pgmap->page_free = fsdax_pagefree;
+
+ return 0;
+}
+
static int pmem_attach_disk(struct device *dev,
struct nd_namespace_common *ndns)
{
struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
struct nd_region *nd_region = to_nd_region(dev->parent);
- int nid = dev_to_node(dev), fua, wbc;
+ int nid = dev_to_node(dev), fua;
struct resource *res = &nsio->res;
struct resource bb_res;
struct nd_pfn *nd_pfn = NULL;
@@ -335,7 +358,6 @@ static int pmem_attach_disk(struct device *dev,
dev_warn(dev, "unable to guarantee persistence of writes\n");
fua = 0;
}
- wbc = nvdimm_has_cache(nd_region);
if (!devm_request_mem_region(dev, res->start, resource_size(res),
dev_name(&ndns->dev))) {
@@ -353,6 +375,8 @@ static int pmem_attach_disk(struct device *dev,
pmem->pfn_flags = PFN_DEV;
pmem->pgmap.ref = &q->q_usage_counter;
if (is_nd_pfn(dev)) {
+ if (setup_pagemap_fsdax(dev, &pmem->pgmap))
+ return -ENOMEM;
addr = devm_memremap_pages(dev, &pmem->pgmap);
pfn_sb = nd_pfn->pfn_sb;
pmem->data_offset = le64_to_cpu(pfn_sb->dataoff);
@@ -364,6 +388,8 @@ static int pmem_attach_disk(struct device *dev,
} else if (pmem_should_map_pages(dev)) {
memcpy(&pmem->pgmap.res, &nsio->res, sizeof(pmem->pgmap.res));
pmem->pgmap.altmap_valid = false;
+ if (setup_pagemap_fsdax(dev, &pmem->pgmap))
+ return -ENOMEM;
addr = devm_memremap_pages(dev, &pmem->pgmap);
pmem->pfn_flags |= PFN_MAP;
memcpy(&bb_res, &pmem->pgmap.res, sizeof(bb_res));
@@ -382,7 +408,7 @@ static int pmem_attach_disk(struct device *dev,
return PTR_ERR(addr);
pmem->virt_addr = addr;
- blk_queue_write_cache(q, wbc, fua);
+ blk_queue_write_cache(q, true, fua);
blk_queue_make_request(q, pmem_make_request);
blk_queue_physical_block_size(q, PAGE_SIZE);
blk_queue_logical_block_size(q, pmem_sector_size(ndns));
@@ -413,7 +439,7 @@ static int pmem_attach_disk(struct device *dev,
put_disk(disk);
return -ENOMEM;
}
- dax_write_cache(dax_dev, wbc);
+ dax_write_cache(dax_dev, nvdimm_has_cache(nd_region));
pmem->dax_dev = dax_dev;
gendev = disk_to_dev(disk);
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index a612be6f019d..ec3543b83330 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -1132,7 +1132,8 @@ EXPORT_SYMBOL_GPL(nvdimm_has_flush);
int nvdimm_has_cache(struct nd_region *nd_region)
{
- return is_nd_pmem(&nd_region->dev);
+ return is_nd_pmem(&nd_region->dev) &&
+ !test_bit(ND_REGION_PERSIST_CACHE, &nd_region->flags);
}
EXPORT_SYMBOL_GPL(nvdimm_has_cache);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 16:44:43 +0000