This is a preparation patch for handling locked nvdimm label regions, a new concept as introduced by the latest DSM document on pmem.io [1]. A future patch will leverage nvdimm_set_locked() at DIMM probe time to flag regions that can not be enabled. There should be no functional difference resulting from this change. [1]: http://pmem.io/documents/NVDIMM_DSM_Interface_Example-V1.3.pdf Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> --- drivers/acpi/nfit/core.c | 4 ++-- drivers/nvdimm/dimm_devs.c | 11 +++++++++-- drivers/nvdimm/namespace_devs.c | 2 +- drivers/nvdimm/nd.h | 1 + drivers/nvdimm/region_devs.c | 4 ++-- include/linux/libnvdimm.h | 6 ++++-- 6 files changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index ced95a79c1a1..a26c2297c1ed 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -1512,7 +1512,7 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) } if (nfit_mem->bdw && nfit_mem->memdev_pmem) - flags |= NDD_ALIASING; + set_bit(NDD_ALIASING, &flags); /* collate flags across all memdevs for this dimm */ list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) { @@ -1527,7 +1527,7 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) mem_flags = __to_nfit_memdev(nfit_mem)->flags; if (mem_flags & ACPI_NFIT_MEM_NOT_ARMED) - flags |= NDD_UNARMED; + set_bit(NDD_UNARMED, &flags); rc = acpi_nfit_add_dimm(acpi_desc, nfit_mem, device_handle); if (rc) diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index 8b721321be5b..7d1a3dbc7d5d 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -34,7 +34,7 @@ int nvdimm_check_config_data(struct device *dev) if (!nvdimm->cmd_mask || !test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask)) { - if (nvdimm->flags & NDD_ALIASING) + if (test_bit(NDD_ALIASING, &nvdimm->flags)) return -ENXIO; else return -ENOTTY; @@ -188,7 +188,14 @@ void nvdimm_set_aliasing(struct device *dev) { struct nvdimm *nvdimm = to_nvdimm(dev); - nvdimm->flags |= NDD_ALIASING; + set_bit(NDD_ALIASING, &nvdimm->flags); +} + +void nvdimm_set_locked(struct device *dev) +{ + struct nvdimm *nvdimm = to_nvdimm(dev); + + set_bit(NDD_LOCKED, &nvdimm->flags); } static void nvdimm_release(struct device *dev) diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 1b481a5fb966..2f2d8afc684a 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -2240,7 +2240,7 @@ static int init_active_labels(struct nd_region *nd_region) * being activated if it aliases DPA. */ if (!ndd) { - if ((nvdimm->flags & NDD_ALIASING) == 0) + if (!test_bit(NDD_ALIASING, &nvdimm->flags)) return 0; dev_dbg(&nd_region->dev, "%s: is disabled, failing probe\n", dev_name(&nd_mapping->nvdimm->dev)); diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index c3b33cf655fb..77d032192bf7 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -240,6 +240,7 @@ int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, long nvdimm_clear_poison(struct device *dev, phys_addr_t phys, unsigned int len); void nvdimm_set_aliasing(struct device *dev); +void nvdimm_set_locked(struct device *dev); struct nd_btt *to_nd_btt(struct device *dev); struct nd_gen_sb { diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index 07756b2e1cd5..b550edf2571f 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -222,7 +222,7 @@ int nd_region_to_nstype(struct nd_region *nd_region) struct nd_mapping *nd_mapping = &nd_region->mapping[i]; struct nvdimm *nvdimm = nd_mapping->nvdimm; - if (nvdimm->flags & NDD_ALIASING) + if (test_bit(NDD_ALIASING, &nvdimm->flags)) alias++; } if (alias) @@ -881,7 +881,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, return NULL; } - if (nvdimm->flags & NDD_UNARMED) + if (test_bit(NDD_UNARMED, &nvdimm->flags)) ro = 1; } diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h index f07b1b14159a..6c807017128d 100644 --- a/include/linux/libnvdimm.h +++ b/include/linux/libnvdimm.h @@ -20,9 +20,11 @@ enum { /* when a dimm supports both PMEM and BLK access a label is required */ - NDD_ALIASING = 1 << 0, + NDD_ALIASING = 0, /* unarmed memory devices may not persist writes */ - NDD_UNARMED = 1 << 1, + NDD_UNARMED = 1, + /* locked memory devices should not be accessed */ + NDD_LOCKED = 2, /* need to set a limit somewhere, but yes, this is likely overkill */ ND_IOCTL_MAX_BUFLEN = SZ_4M, -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
