57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright(c) 2022 Intel Corporation. All rights reserved. */
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#include <linux/libnvdimm.h>
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#include <asm/unaligned.h>
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#include <linux/module.h>
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#include <linux/async.h>
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#include <linux/slab.h>
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#include "cxlmem.h"
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#include "cxl.h"
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static unsigned long cxl_pmem_get_security_flags(struct nvdimm *nvdimm,
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enum nvdimm_passphrase_type ptype)
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{
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struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
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struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
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struct cxl_dev_state *cxlds = cxlmd->cxlds;
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unsigned long security_flags = 0;
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u32 sec_out;
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int rc;
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rc = cxl_mbox_send_cmd(cxlds, CXL_MBOX_OP_GET_SECURITY_STATE, NULL, 0,
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&sec_out, sizeof(sec_out));
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if (rc < 0)
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return 0;
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if (ptype == NVDIMM_MASTER) {
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if (sec_out & CXL_PMEM_SEC_STATE_MASTER_PASS_SET)
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set_bit(NVDIMM_SECURITY_UNLOCKED, &security_flags);
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else
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set_bit(NVDIMM_SECURITY_DISABLED, &security_flags);
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if (sec_out & CXL_PMEM_SEC_STATE_MASTER_PLIMIT)
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set_bit(NVDIMM_SECURITY_FROZEN, &security_flags);
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return security_flags;
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}
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if (sec_out & CXL_PMEM_SEC_STATE_USER_PASS_SET) {
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if (sec_out & CXL_PMEM_SEC_STATE_FROZEN ||
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sec_out & CXL_PMEM_SEC_STATE_USER_PLIMIT)
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set_bit(NVDIMM_SECURITY_FROZEN, &security_flags);
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if (sec_out & CXL_PMEM_SEC_STATE_LOCKED)
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set_bit(NVDIMM_SECURITY_LOCKED, &security_flags);
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else
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set_bit(NVDIMM_SECURITY_UNLOCKED, &security_flags);
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} else {
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set_bit(NVDIMM_SECURITY_DISABLED, &security_flags);
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}
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return security_flags;
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}
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static const struct nvdimm_security_ops __cxl_security_ops = {
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.get_flags = cxl_pmem_get_security_flags,
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};
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const struct nvdimm_security_ops *cxl_security_ops = &__cxl_security_ops;
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