diff options
Diffstat (limited to 'drivers/nvdimm/pmem.c')
| -rw-r--r-- | drivers/nvdimm/pmem.c | 90 |
1 files changed, 64 insertions, 26 deletions
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index fbc640bf06b0..c544d466ea51 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -29,6 +29,7 @@ #include <linux/pfn_t.h> #include <linux/slab.h> #include <linux/pmem.h> +#include <linux/dax.h> #include <linux/nd.h> #include "pmem.h" #include "pfn.h" @@ -89,7 +90,7 @@ static int read_pmem(struct page *page, unsigned int off, int rc; void *mem = kmap_atomic(page); - rc = memcpy_from_pmem(mem + off, pmem_addr, len); + rc = memcpy_mcsafe(mem + off, pmem_addr, len); kunmap_atomic(mem); if (rc) return -EIO; @@ -200,13 +201,13 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, } /* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */ -__weak long pmem_direct_access(struct block_device *bdev, sector_t sector, - void **kaddr, pfn_t *pfn, long size) +__weak long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, + long nr_pages, void **kaddr, pfn_t *pfn) { - struct pmem_device *pmem = bdev->bd_queue->queuedata; - resource_size_t offset = sector * 512 + pmem->data_offset; + resource_size_t offset = PFN_PHYS(pgoff) + pmem->data_offset; - if (unlikely(is_bad_pmem(&pmem->bb, sector, size))) + if (unlikely(is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512, + PFN_PHYS(nr_pages)))) return -EIO; *kaddr = pmem->virt_addr + offset; *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); @@ -216,17 +217,28 @@ __weak long pmem_direct_access(struct block_device *bdev, sector_t sector, * requested range. */ if (unlikely(pmem->bb.count)) - return size; - return pmem->size - pmem->pfn_pad - offset; + return nr_pages; + return PHYS_PFN(pmem->size - pmem->pfn_pad - offset); } static const struct block_device_operations pmem_fops = { .owner = THIS_MODULE, .rw_page = pmem_rw_page, - .direct_access = pmem_direct_access, .revalidate_disk = nvdimm_revalidate_disk, }; +static long pmem_dax_direct_access(struct dax_device *dax_dev, + pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) +{ + struct pmem_device *pmem = dax_get_private(dax_dev); + + return __pmem_direct_access(pmem, pgoff, nr_pages, kaddr, pfn); +} + +static const struct dax_operations pmem_dax_ops = { + .direct_access = pmem_dax_direct_access, +}; + static void pmem_release_queue(void *q) { blk_cleanup_queue(q); @@ -237,10 +249,14 @@ static void pmem_freeze_queue(void *q) blk_freeze_queue_start(q); } -static void pmem_release_disk(void *disk) +static void pmem_release_disk(void *__pmem) { - del_gendisk(disk); - put_disk(disk); + struct pmem_device *pmem = __pmem; + + kill_dax(pmem->dax_dev); + put_dax(pmem->dax_dev); + del_gendisk(pmem->disk); + put_disk(pmem->disk); } static int pmem_attach_disk(struct device *dev, @@ -251,6 +267,7 @@ static int pmem_attach_disk(struct device *dev, struct vmem_altmap __altmap, *altmap = NULL; 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; @@ -334,6 +351,7 @@ static int pmem_attach_disk(struct device *dev, disk = alloc_disk_node(0, nid); if (!disk) return -ENOMEM; + pmem->disk = disk; disk->fops = &pmem_fops; disk->queue = q; @@ -345,9 +363,16 @@ static int pmem_attach_disk(struct device *dev, return -ENOMEM; nvdimm_badblocks_populate(nd_region, &pmem->bb, res); disk->bb = &pmem->bb; - device_add_disk(dev, disk); - if (devm_add_action_or_reset(dev, pmem_release_disk, disk)) + dax_dev = alloc_dax(pmem, disk->disk_name, &pmem_dax_ops); + if (!dax_dev) { + put_disk(disk); + return -ENOMEM; + } + pmem->dax_dev = dax_dev; + + device_add_disk(dev, disk); + if (devm_add_action_or_reset(dev, pmem_release_disk, pmem)) return -ENOMEM; revalidate_disk(disk); @@ -397,12 +422,12 @@ static void nd_pmem_shutdown(struct device *dev) static void nd_pmem_notify(struct device *dev, enum nvdimm_event event) { - struct pmem_device *pmem = dev_get_drvdata(dev); - struct nd_region *nd_region = to_region(pmem); + struct nd_region *nd_region; resource_size_t offset = 0, end_trunc = 0; struct nd_namespace_common *ndns; struct nd_namespace_io *nsio; struct resource res; + struct badblocks *bb; if (event != NVDIMM_REVALIDATE_POISON) return; @@ -411,20 +436,33 @@ static void nd_pmem_notify(struct device *dev, enum nvdimm_event event) struct nd_btt *nd_btt = to_nd_btt(dev); ndns = nd_btt->ndns; - } else if (is_nd_pfn(dev)) { - struct nd_pfn *nd_pfn = to_nd_pfn(dev); - struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb; + nd_region = to_nd_region(ndns->dev.parent); + nsio = to_nd_namespace_io(&ndns->dev); + bb = &nsio->bb; + } else { + struct pmem_device *pmem = dev_get_drvdata(dev); - ndns = nd_pfn->ndns; - offset = pmem->data_offset + __le32_to_cpu(pfn_sb->start_pad); - end_trunc = __le32_to_cpu(pfn_sb->end_trunc); - } else - ndns = to_ndns(dev); + nd_region = to_region(pmem); + bb = &pmem->bb; + + if (is_nd_pfn(dev)) { + struct nd_pfn *nd_pfn = to_nd_pfn(dev); + struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb; + + ndns = nd_pfn->ndns; + offset = pmem->data_offset + + __le32_to_cpu(pfn_sb->start_pad); + end_trunc = __le32_to_cpu(pfn_sb->end_trunc); + } else { + ndns = to_ndns(dev); + } + + nsio = to_nd_namespace_io(&ndns->dev); + } - nsio = to_nd_namespace_io(&ndns->dev); res.start = nsio->res.start + offset; res.end = nsio->res.end - end_trunc; - nvdimm_badblocks_populate(nd_region, &pmem->bb, &res); + nvdimm_badblocks_populate(nd_region, bb, &res); } MODULE_ALIAS("pmem"); |