diff options
Diffstat (limited to 'drivers/acpi/nfit/intel.c')
-rw-r--r-- | drivers/acpi/nfit/intel.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/acpi/nfit/intel.c b/drivers/acpi/nfit/intel.c new file mode 100644 index 000000000000..fd7a8f6d2c20 --- /dev/null +++ b/drivers/acpi/nfit/intel.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2018 Intel Corporation. All rights reserved. */ +#include <linux/libnvdimm.h> +#include <linux/ndctl.h> +#include <linux/acpi.h> +#include "intel.h" +#include "nfit.h" + +static enum nvdimm_security_state intel_security_state(struct nvdimm *nvdimm) +{ + struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); + struct { + struct nd_cmd_pkg pkg; + struct nd_intel_get_security_state cmd; + } nd_cmd = { + .pkg = { + .nd_command = NVDIMM_INTEL_GET_SECURITY_STATE, + .nd_family = NVDIMM_FAMILY_INTEL, + .nd_size_out = + sizeof(struct nd_intel_get_security_state), + .nd_fw_size = + sizeof(struct nd_intel_get_security_state), + }, + }; + int rc; + + if (!test_bit(NVDIMM_INTEL_GET_SECURITY_STATE, &nfit_mem->dsm_mask)) + return -ENXIO; + + rc = nvdimm_ctl(nvdimm, ND_CMD_CALL, &nd_cmd, sizeof(nd_cmd), NULL); + if (rc < 0) + return rc; + if (nd_cmd.cmd.status) + return -EIO; + + /* check and see if security is enabled and locked */ + if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_UNSUPPORTED) + return -ENXIO; + else if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_ENABLED) { + if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_LOCKED) + return NVDIMM_SECURITY_LOCKED; + else if (nd_cmd.cmd.state & ND_INTEL_SEC_STATE_FROZEN || + nd_cmd.cmd.state & ND_INTEL_SEC_STATE_PLIMIT) + return NVDIMM_SECURITY_FROZEN; + else + return NVDIMM_SECURITY_UNLOCKED; + } + return NVDIMM_SECURITY_DISABLED; +} + +static const struct nvdimm_security_ops __intel_security_ops = { + .state = intel_security_state, +}; +const struct nvdimm_security_ops *intel_security_ops = &__intel_security_ops; |