From a0e374525def2ef18a078523e1faefb5ce2b05e5 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 30 Jan 2020 12:06:18 -0800 Subject: libnvdimm/region: Introduce NDD_LABELING The NDD_ALIASING flag is used to indicate where pmem capacity might alias with blk capacity and require labeling. It is also used to indicate whether the DIMM supports labeling. Separate this latter capability into its own flag so that the NDD_ALIASING flag is scoped to true aliased configurations. To my knowledge aliased configurations only exist in the ACPI spec, there are no known platforms that ship this support in production. This clarity allows namespace-capacity alignment constraints around interleave-ways to be relaxed. Cc: Vishal Verma Cc: Oliver O'Halloran Reviewed-by: Jeff Moyer Reviewed-by: Aneesh Kumar K.V Link: https://lore.kernel.org/r/158041477856.3889308.4212605617834097674.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams --- drivers/nvdimm/dimm.c | 2 +- drivers/nvdimm/dimm_devs.c | 9 +++++---- drivers/nvdimm/namespace_devs.c | 2 +- drivers/nvdimm/nd.h | 2 +- drivers/nvdimm/region_devs.c | 10 +++++----- 5 files changed, 13 insertions(+), 12 deletions(-) (limited to 'drivers/nvdimm') diff --git a/drivers/nvdimm/dimm.c b/drivers/nvdimm/dimm.c index 64776ed15bb3..7d4ddc4d9322 100644 --- a/drivers/nvdimm/dimm.c +++ b/drivers/nvdimm/dimm.c @@ -99,7 +99,7 @@ static int nvdimm_probe(struct device *dev) if (ndd->ns_current >= 0) { rc = nd_label_reserve_dpa(ndd); if (rc == 0) - nvdimm_set_aliasing(dev); + nvdimm_set_labeling(dev); } nvdimm_bus_unlock(dev); diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index 94ea6dba6b4f..39a61a514746 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -32,7 +32,7 @@ int nvdimm_check_config_data(struct device *dev) if (!nvdimm->cmd_mask || !test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask)) { - if (test_bit(NDD_ALIASING, &nvdimm->flags)) + if (test_bit(NDD_LABELING, &nvdimm->flags)) return -ENXIO; else return -ENOTTY; @@ -173,11 +173,11 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, return rc; } -void nvdimm_set_aliasing(struct device *dev) +void nvdimm_set_labeling(struct device *dev) { struct nvdimm *nvdimm = to_nvdimm(dev); - set_bit(NDD_ALIASING, &nvdimm->flags); + set_bit(NDD_LABELING, &nvdimm->flags); } void nvdimm_set_locked(struct device *dev) @@ -312,8 +312,9 @@ static ssize_t flags_show(struct device *dev, { struct nvdimm *nvdimm = to_nvdimm(dev); - return sprintf(buf, "%s%s\n", + return sprintf(buf, "%s%s%s\n", test_bit(NDD_ALIASING, &nvdimm->flags) ? "alias " : "", + test_bit(NDD_LABELING, &nvdimm->flags) ? "label " : "", test_bit(NDD_LOCKED, &nvdimm->flags) ? "lock " : ""); } static DEVICE_ATTR_RO(flags); diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 77e211c7d94d..01f6c22f0d1a 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -2538,7 +2538,7 @@ static int init_active_labels(struct nd_region *nd_region) if (!ndd) { if (test_bit(NDD_LOCKED, &nvdimm->flags)) /* fail, label data may be unreadable */; - else if (test_bit(NDD_ALIASING, &nvdimm->flags)) + else if (test_bit(NDD_LABELING, &nvdimm->flags)) /* fail, labels needed to disambiguate dpa */; else return 0; diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index c9f6a5b5253a..ca39abe29c7c 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -252,7 +252,7 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, void *buf, size_t len); long nvdimm_clear_poison(struct device *dev, phys_addr_t phys, unsigned int len); -void nvdimm_set_aliasing(struct device *dev); +void nvdimm_set_labeling(struct device *dev); void nvdimm_set_locked(struct device *dev); void nvdimm_clear_locked(struct device *dev); int nvdimm_security_setup_events(struct device *dev); diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index a19e535830d9..a5fc6e4c56ff 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -195,16 +195,16 @@ EXPORT_SYMBOL_GPL(nd_blk_region_set_provider_data); int nd_region_to_nstype(struct nd_region *nd_region) { if (is_memory(&nd_region->dev)) { - u16 i, alias; + u16 i, label; - for (i = 0, alias = 0; i < nd_region->ndr_mappings; i++) { + for (i = 0, label = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; struct nvdimm *nvdimm = nd_mapping->nvdimm; - if (test_bit(NDD_ALIASING, &nvdimm->flags)) - alias++; + if (test_bit(NDD_LABELING, &nvdimm->flags)) + label++; } - if (alias) + if (label) return ND_DEVICE_NAMESPACE_PMEM; else return ND_DEVICE_NAMESPACE_IO; -- cgit v1.2.3