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path: root/drivers/nvdimm/pmem.c
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Diffstat (limited to 'drivers/nvdimm/pmem.c')
-rw-r--r--drivers/nvdimm/pmem.c92
1 files changed, 71 insertions, 21 deletions
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index c544d466ea51..f7099adaabc0 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -28,7 +28,7 @@
#include <linux/blk-mq.h>
#include <linux/pfn_t.h>
#include <linux/slab.h>
-#include <linux/pmem.h>
+#include <linux/uio.h>
#include <linux/dax.h>
#include <linux/nd.h>
#include "pmem.h"
@@ -49,28 +49,30 @@ static struct nd_region *to_region(struct pmem_device *pmem)
return to_nd_region(to_dev(pmem)->parent);
}
-static int pmem_clear_poison(struct pmem_device *pmem, phys_addr_t offset,
- unsigned int len)
+static blk_status_t pmem_clear_poison(struct pmem_device *pmem,
+ phys_addr_t offset, unsigned int len)
{
struct device *dev = to_dev(pmem);
sector_t sector;
long cleared;
- int rc = 0;
+ blk_status_t rc = BLK_STS_OK;
sector = (offset - pmem->data_offset) / 512;
cleared = nvdimm_clear_poison(dev, pmem->phys_addr + offset, len);
if (cleared < len)
- rc = -EIO;
+ rc = BLK_STS_IOERR;
if (cleared > 0 && cleared / 512) {
cleared /= 512;
dev_dbg(dev, "%s: %#llx clear %ld sector%s\n", __func__,
(unsigned long long) sector, cleared,
cleared > 1 ? "s" : "");
badblocks_clear(&pmem->bb, sector, cleared);
+ if (pmem->bb_state)
+ sysfs_notify_dirent(pmem->bb_state);
}
- invalidate_pmem(pmem->virt_addr + offset, len);
+ arch_invalidate_pmem(pmem->virt_addr + offset, len);
return rc;
}
@@ -80,11 +82,11 @@ static void write_pmem(void *pmem_addr, struct page *page,
{
void *mem = kmap_atomic(page);
- memcpy_to_pmem(pmem_addr, mem + off, len);
+ memcpy_flushcache(pmem_addr, mem + off, len);
kunmap_atomic(mem);
}
-static int read_pmem(struct page *page, unsigned int off,
+static blk_status_t read_pmem(struct page *page, unsigned int off,
void *pmem_addr, unsigned int len)
{
int rc;
@@ -93,15 +95,15 @@ static int read_pmem(struct page *page, unsigned int off,
rc = memcpy_mcsafe(mem + off, pmem_addr, len);
kunmap_atomic(mem);
if (rc)
- return -EIO;
- return 0;
+ return BLK_STS_IOERR;
+ return BLK_STS_OK;
}
-static int pmem_do_bvec(struct pmem_device *pmem, struct page *page,
+static blk_status_t pmem_do_bvec(struct pmem_device *pmem, struct page *page,
unsigned int len, unsigned int off, bool is_write,
sector_t sector)
{
- int rc = 0;
+ blk_status_t rc = BLK_STS_OK;
bool bad_pmem = false;
phys_addr_t pmem_off = sector * 512 + pmem->data_offset;
void *pmem_addr = pmem->virt_addr + pmem_off;
@@ -111,7 +113,7 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page,
if (!is_write) {
if (unlikely(bad_pmem))
- rc = -EIO;
+ rc = BLK_STS_IOERR;
else {
rc = read_pmem(page, off, pmem_addr, len);
flush_dcache_page(page);
@@ -149,7 +151,7 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page,
static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
{
- int rc = 0;
+ blk_status_t rc = 0;
bool do_acct;
unsigned long start;
struct bio_vec bvec;
@@ -166,7 +168,7 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
bvec.bv_offset, op_is_write(bio_op(bio)),
iter.bi_sector);
if (rc) {
- bio->bi_error = rc;
+ bio->bi_status = rc;
break;
}
}
@@ -184,7 +186,7 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector,
struct page *page, bool is_write)
{
struct pmem_device *pmem = bdev->bd_queue->queuedata;
- int rc;
+ blk_status_t rc;
rc = pmem_do_bvec(pmem, page, PAGE_SIZE, 0, is_write, sector);
@@ -197,7 +199,7 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector,
if (rc == 0)
page_endio(page, is_write, 0);
- return rc;
+ return blk_status_to_errno(rc);
}
/* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */
@@ -235,8 +237,27 @@ static long pmem_dax_direct_access(struct dax_device *dax_dev,
return __pmem_direct_access(pmem, pgoff, nr_pages, kaddr, pfn);
}
+static size_t pmem_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff,
+ void *addr, size_t bytes, struct iov_iter *i)
+{
+ return copy_from_iter_flushcache(addr, bytes, i);
+}
+
+static void pmem_dax_flush(struct dax_device *dax_dev, pgoff_t pgoff,
+ void *addr, size_t size)
+{
+ arch_wb_cache_pmem(addr, size);
+}
+
static const struct dax_operations pmem_dax_ops = {
.direct_access = pmem_dax_direct_access,
+ .copy_from_iter = pmem_copy_from_iter,
+ .flush = pmem_dax_flush,
+};
+
+static const struct attribute_group *pmem_attribute_groups[] = {
+ &dax_attribute_group,
+ NULL,
};
static void pmem_release_queue(void *q)
@@ -265,14 +286,15 @@ static int pmem_attach_disk(struct device *dev,
struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
struct nd_region *nd_region = to_nd_region(dev->parent);
struct vmem_altmap __altmap, *altmap = NULL;
+ int nid = dev_to_node(dev), fua, wbc;
struct resource *res = &nsio->res;
struct nd_pfn *nd_pfn = NULL;
struct dax_device *dax_dev;
- int nid = dev_to_node(dev);
struct nd_pfn_sb *pfn_sb;
struct pmem_device *pmem;
struct resource pfn_res;
struct request_queue *q;
+ struct device *gendev;
struct gendisk *disk;
void *addr;
@@ -294,8 +316,12 @@ static int pmem_attach_disk(struct device *dev,
dev_set_drvdata(dev, pmem);
pmem->phys_addr = res->start;
pmem->size = resource_size(res);
- if (nvdimm_has_flush(nd_region) < 0)
+ fua = nvdimm_has_flush(nd_region);
+ if (!IS_ENABLED(CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE) || fua < 0) {
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))) {
@@ -339,11 +365,11 @@ static int pmem_attach_disk(struct device *dev,
return PTR_ERR(addr);
pmem->virt_addr = addr;
- blk_queue_write_cache(q, true, true);
+ blk_queue_write_cache(q, wbc, 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));
blk_queue_max_hw_sectors(q, UINT_MAX);
- blk_queue_bounce_limit(q, BLK_BOUNCE_ANY);
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
queue_flag_set_unlocked(QUEUE_FLAG_DAX, q);
q->queuedata = pmem;
@@ -369,14 +395,23 @@ static int pmem_attach_disk(struct device *dev,
put_disk(disk);
return -ENOMEM;
}
+ dax_write_cache(dax_dev, wbc);
pmem->dax_dev = dax_dev;
+ gendev = disk_to_dev(disk);
+ gendev->groups = pmem_attribute_groups;
+
device_add_disk(dev, disk);
if (devm_add_action_or_reset(dev, pmem_release_disk, pmem))
return -ENOMEM;
revalidate_disk(disk);
+ pmem->bb_state = sysfs_get_dirent(disk_to_dev(disk)->kobj.sd,
+ "badblocks");
+ if (!pmem->bb_state)
+ dev_warn(dev, "'badblocks' notification disabled\n");
+
return 0;
}
@@ -408,8 +443,18 @@ static int nd_pmem_probe(struct device *dev)
static int nd_pmem_remove(struct device *dev)
{
+ struct pmem_device *pmem = dev_get_drvdata(dev);
+
if (is_nd_btt(dev))
nvdimm_namespace_detach_btt(to_nd_btt(dev));
+ else {
+ /*
+ * Note, this assumes device_lock() context to not race
+ * nd_pmem_notify()
+ */
+ sysfs_put(pmem->bb_state);
+ pmem->bb_state = NULL;
+ }
nvdimm_flush(to_nd_region(dev->parent));
return 0;
@@ -428,6 +473,7 @@ static void nd_pmem_notify(struct device *dev, enum nvdimm_event event)
struct nd_namespace_io *nsio;
struct resource res;
struct badblocks *bb;
+ struct kernfs_node *bb_state;
if (event != NVDIMM_REVALIDATE_POISON)
return;
@@ -439,11 +485,13 @@ static void nd_pmem_notify(struct device *dev, enum nvdimm_event event)
nd_region = to_nd_region(ndns->dev.parent);
nsio = to_nd_namespace_io(&ndns->dev);
bb = &nsio->bb;
+ bb_state = NULL;
} else {
struct pmem_device *pmem = dev_get_drvdata(dev);
nd_region = to_region(pmem);
bb = &pmem->bb;
+ bb_state = pmem->bb_state;
if (is_nd_pfn(dev)) {
struct nd_pfn *nd_pfn = to_nd_pfn(dev);
@@ -463,6 +511,8 @@ static void nd_pmem_notify(struct device *dev, enum nvdimm_event event)
res.start = nsio->res.start + offset;
res.end = nsio->res.end - end_trunc;
nvdimm_badblocks_populate(nd_region, bb, &res);
+ if (bb_state)
+ sysfs_notify_dirent(bb_state);
}
MODULE_ALIAS("pmem");
generated by cgit v1.2.3 (git 2.39.0) at 2025-03-04 02:17:26 +0300