projects/linux·blob master · refs

206 lines · 6.0 KiB

1// SPDX-License-Identifier: GPL-2.0-only
2/* Copyright(c) 2022 Intel Corporation. All rights reserved. */
3#include <linux/libnvdimm.h>
4#include <linux/unaligned.h>
5#include <linux/module.h>
6#include <linux/async.h>
7#include <linux/slab.h>
8#include <linux/memregion.h>
9#include "cxlmem.h"
10#include "cxl.h"
11
12static unsigned long cxl_pmem_get_security_flags(struct nvdimm *nvdimm,
13 enum nvdimm_passphrase_type ptype)
14{
15 struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
16 struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
17 struct cxl_mailbox *cxl_mbox = &cxlmd->cxlds->cxl_mbox;
18 struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
19 unsigned long security_flags = 0;
20 struct cxl_get_security_output {
21 __le32 flags;
22 } out;
23 struct cxl_mbox_cmd mbox_cmd;
24 u32 sec_out;
25 int rc;
26
27 mbox_cmd = (struct cxl_mbox_cmd) {
28 .opcode = CXL_MBOX_OP_GET_SECURITY_STATE,
29 .size_out = sizeof(out),
30 .payload_out = &out,
31 };
32
33 rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
34 if (rc < 0)
35 return 0;
36
37 sec_out = le32_to_cpu(out.flags);
38 /* cache security state */
39 mds->security.state = sec_out;
40
41 if (ptype == NVDIMM_MASTER) {
42 if (sec_out & CXL_PMEM_SEC_STATE_MASTER_PASS_SET)
43 set_bit(NVDIMM_SECURITY_UNLOCKED, &security_flags);
44 else
45 set_bit(NVDIMM_SECURITY_DISABLED, &security_flags);
46 if (sec_out & CXL_PMEM_SEC_STATE_MASTER_PLIMIT)
47 set_bit(NVDIMM_SECURITY_FROZEN, &security_flags);
48 return security_flags;
49 }
50
51 if (sec_out & CXL_PMEM_SEC_STATE_USER_PASS_SET) {
52 if (sec_out & CXL_PMEM_SEC_STATE_FROZEN ||
53 sec_out & CXL_PMEM_SEC_STATE_USER_PLIMIT)
54 set_bit(NVDIMM_SECURITY_FROZEN, &security_flags);
55
56 if (sec_out & CXL_PMEM_SEC_STATE_LOCKED)
57 set_bit(NVDIMM_SECURITY_LOCKED, &security_flags);
58 else
59 set_bit(NVDIMM_SECURITY_UNLOCKED, &security_flags);
60 } else {
61 set_bit(NVDIMM_SECURITY_DISABLED, &security_flags);
62 }
63
64 return security_flags;
65}
66
67static int cxl_pmem_security_change_key(struct nvdimm *nvdimm,
68 const struct nvdimm_key_data *old_data,
69 const struct nvdimm_key_data *new_data,
70 enum nvdimm_passphrase_type ptype)
71{
72 struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
73 struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
74 struct cxl_mailbox *cxl_mbox = &cxlmd->cxlds->cxl_mbox;
75 struct cxl_mbox_cmd mbox_cmd;
76 struct cxl_set_pass set_pass;
77
78 set_pass = (struct cxl_set_pass) {
79 .type = ptype == NVDIMM_MASTER ? CXL_PMEM_SEC_PASS_MASTER :
80 CXL_PMEM_SEC_PASS_USER,
81 };
82 memcpy(set_pass.old_pass, old_data->data, NVDIMM_PASSPHRASE_LEN);
83 memcpy(set_pass.new_pass, new_data->data, NVDIMM_PASSPHRASE_LEN);
84
85 mbox_cmd = (struct cxl_mbox_cmd) {
86 .opcode = CXL_MBOX_OP_SET_PASSPHRASE,
87 .size_in = sizeof(set_pass),
88 .payload_in = &set_pass,
89 };
90
91 return cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
92}
93
94static int __cxl_pmem_security_disable(struct nvdimm *nvdimm,
95 const struct nvdimm_key_data *key_data,
96 enum nvdimm_passphrase_type ptype)
97{
98 struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
99 struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
100 struct cxl_mailbox *cxl_mbox = &cxlmd->cxlds->cxl_mbox;
101 struct cxl_disable_pass dis_pass;
102 struct cxl_mbox_cmd mbox_cmd;
103
104 dis_pass = (struct cxl_disable_pass) {
105 .type = ptype == NVDIMM_MASTER ? CXL_PMEM_SEC_PASS_MASTER :
106 CXL_PMEM_SEC_PASS_USER,
107 };
108 memcpy(dis_pass.pass, key_data->data, NVDIMM_PASSPHRASE_LEN);
109
110 mbox_cmd = (struct cxl_mbox_cmd) {
111 .opcode = CXL_MBOX_OP_DISABLE_PASSPHRASE,
112 .size_in = sizeof(dis_pass),
113 .payload_in = &dis_pass,
114 };
115
116 return cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
117}
118
119static int cxl_pmem_security_disable(struct nvdimm *nvdimm,
120 const struct nvdimm_key_data *key_data)
121{
122 return __cxl_pmem_security_disable(nvdimm, key_data, NVDIMM_USER);
123}
124
125static int cxl_pmem_security_disable_master(struct nvdimm *nvdimm,
126 const struct nvdimm_key_data *key_data)
127{
128 return __cxl_pmem_security_disable(nvdimm, key_data, NVDIMM_MASTER);
129}
130
131static int cxl_pmem_security_freeze(struct nvdimm *nvdimm)
132{
133 struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
134 struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
135 struct cxl_mailbox *cxl_mbox = &cxlmd->cxlds->cxl_mbox;
136 struct cxl_mbox_cmd mbox_cmd = {
137 .opcode = CXL_MBOX_OP_FREEZE_SECURITY,
138 };
139
140 return cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
141}
142
143static int cxl_pmem_security_unlock(struct nvdimm *nvdimm,
144 const struct nvdimm_key_data *key_data)
145{
146 struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
147 struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
148 struct cxl_mailbox *cxl_mbox = &cxlmd->cxlds->cxl_mbox;
149 u8 pass[NVDIMM_PASSPHRASE_LEN];
150 struct cxl_mbox_cmd mbox_cmd;
151 int rc;
152
153 memcpy(pass, key_data->data, NVDIMM_PASSPHRASE_LEN);
154 mbox_cmd = (struct cxl_mbox_cmd) {
155 .opcode = CXL_MBOX_OP_UNLOCK,
156 .size_in = NVDIMM_PASSPHRASE_LEN,
157 .payload_in = pass,
158 };
159
160 rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
161 if (rc < 0)
162 return rc;
163
164 return 0;
165}
166
167static int cxl_pmem_security_passphrase_erase(struct nvdimm *nvdimm,
168 const struct nvdimm_key_data *key,
169 enum nvdimm_passphrase_type ptype)
170{
171 struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
172 struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
173 struct cxl_mailbox *cxl_mbox = &cxlmd->cxlds->cxl_mbox;
174 struct cxl_mbox_cmd mbox_cmd;
175 struct cxl_pass_erase erase;
176 int rc;
177
178 erase = (struct cxl_pass_erase) {
179 .type = ptype == NVDIMM_MASTER ? CXL_PMEM_SEC_PASS_MASTER :
180 CXL_PMEM_SEC_PASS_USER,
181 };
182 memcpy(erase.pass, key->data, NVDIMM_PASSPHRASE_LEN);
183 mbox_cmd = (struct cxl_mbox_cmd) {
184 .opcode = CXL_MBOX_OP_PASSPHRASE_SECURE_ERASE,
185 .size_in = sizeof(erase),
186 .payload_in = &erase,
187 };
188
189 rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
190 if (rc < 0)
191 return rc;
192
193 return 0;
194}
195
196static const struct nvdimm_security_ops __cxl_security_ops = {
197 .get_flags = cxl_pmem_get_security_flags,
198 .change_key = cxl_pmem_security_change_key,
199 .disable = cxl_pmem_security_disable,
200 .freeze = cxl_pmem_security_freeze,
201 .unlock = cxl_pmem_security_unlock,
202 .erase = cxl_pmem_security_passphrase_erase,
203 .disable_master = cxl_pmem_security_disable_master,
204};
205
206const struct nvdimm_security_ops *cxl_security_ops = &__cxl_security_ops;