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