lib/tpm_api.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2019 Google LLC
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <log.h>
   9 #include <tpm_api.h>
  10 #include <tpm-v1.h>
  11 #include <tpm-v2.h>
  12 #include <tpm_api.h>
  13
  14 static bool is_tpm1(struct udevice *dev)
  15 {
  16         return IS_ENABLED(CONFIG_TPM_V1) && tpm_get_version(dev) == TPM_V1;
  17 }
  18
  19 static bool is_tpm2(struct udevice *dev)
  20 {
  21         return IS_ENABLED(CONFIG_TPM_V2) && tpm_get_version(dev) == TPM_V2;
  22 }
  23
  24 u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode)
  25 {
  26         if (is_tpm1(dev)) {
  27                 return tpm1_startup(dev, mode);
  28         } else if (is_tpm2(dev)) {
  29                 enum tpm2_startup_types type;
  30
  31                 switch (mode) {
  32                 case TPM_ST_CLEAR:
  33                         type = TPM2_SU_CLEAR;
  34                         break;
  35                 case TPM_ST_STATE:
  36                         type = TPM2_SU_STATE;
  37                         break;
  38                 default:
  39                 case TPM_ST_DEACTIVATED:
  40                         return -EINVAL;
  41                 }
  42                 return tpm2_startup(dev, type);
  43         } else {
  44                 return -ENOSYS;
  45         }
  46 }
  47
  48 u32 tpm_resume(struct udevice *dev)
  49 {
  50         if (is_tpm1(dev))
  51                 return tpm1_startup(dev, TPM_ST_STATE);
  52         else if (is_tpm2(dev))
  53                 return tpm2_startup(dev, TPM2_SU_STATE);
  54         else
  55                 return -ENOSYS;
  56 }
  57
  58 u32 tpm_self_test_full(struct udevice *dev)
  59 {
  60         if (is_tpm1(dev))
  61                 return tpm1_self_test_full(dev);
  62         else if (is_tpm2(dev))
  63                 return tpm2_self_test(dev, TPMI_YES);
  64         else
  65                 return -ENOSYS;
  66 }
  67
  68 u32 tpm_continue_self_test(struct udevice *dev)
  69 {
  70         if (is_tpm1(dev))
  71                 return tpm1_continue_self_test(dev);
  72         else if (is_tpm2(dev))
  73                 return tpm2_self_test(dev, TPMI_NO);
  74         else
  75                 return -ENOSYS;
  76 }
  77
  78 u32 tpm_clear_and_reenable(struct udevice *dev)
  79 {
  80         u32 ret;
  81
  82         log_info("TPM: Clear and re-enable\n");
  83         ret = tpm_force_clear(dev);
  84         if (ret != TPM_SUCCESS) {
  85                 log_err("Can't initiate a force clear\n");
  86                 return ret;
  87         }
  88
  89         if (is_tpm1(dev)) {
  90                 ret = tpm1_physical_enable(dev);
  91                 if (ret != TPM_SUCCESS) {
  92                         log_err("TPM: Can't set enabled state\n");
  93                         return ret;
  94                 }
  95
  96                 ret = tpm1_physical_set_deactivated(dev, 0);
  97                 if (ret != TPM_SUCCESS) {
  98                         log_err("TPM: Can't set deactivated state\n");
  99                         return ret;
 100                 }
 101         }
 102
 103         return TPM_SUCCESS;
 104 }
 105
 106 u32 tpm_nv_enable_locking(struct udevice *dev)
 107 {
 108         if (is_tpm1(dev))
 109                 return tpm1_nv_define_space(dev, TPM_NV_INDEX_LOCK, 0, 0);
 110         else if (is_tpm2(dev))
 111                 return -ENOSYS;
 112         else
 113                 return -ENOSYS;
 114 }
 115
 116 u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
 117 {
 118         if (is_tpm1(dev))
 119                 return tpm1_nv_read_value(dev, index, data, count);
 120         else if (is_tpm2(dev))
 121                 return tpm2_nv_read_value(dev, index, data, count);
 122         else
 123                 return -ENOSYS;
 124 }
 125
 126 u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
 127                        u32 count)
 128 {
 129         if (is_tpm1(dev))
 130                 return tpm1_nv_write_value(dev, index, data, count);
 131         else if (is_tpm2(dev))
 132                 return tpm2_nv_write_value(dev, index, data, count);
 133         else
 134                 return -ENOSYS;
 135 }
 136
 137 u32 tpm_set_global_lock(struct udevice *dev)
 138 {
 139         return tpm_nv_write_value(dev, TPM_NV_INDEX_0, NULL, 0);
 140 }
 141
 142 u32 tpm_write_lock(struct udevice *dev, u32 index)
 143 {
 144         if (is_tpm1(dev))
 145                 return -ENOSYS;
 146         else if (is_tpm2(dev))
 147                 return tpm2_write_lock(dev, index);
 148         else
 149                 return -ENOSYS;
 150 }
 151
 152 u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
 153                    void *out_digest)
 154 {
 155         if (is_tpm1(dev))
 156                 return tpm1_extend(dev, index, in_digest, out_digest);
 157         else if (is_tpm2(dev))
 158                 return tpm2_pcr_extend(dev, index, TPM2_ALG_SHA256, in_digest,
 159                                        TPM2_DIGEST_LEN);
 160         else
 161                 return -ENOSYS;
 162 }
 163
 164 u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count)
 165 {
 166         if (is_tpm1(dev))
 167                 return tpm1_pcr_read(dev, index, data, count);
 168         else if (is_tpm2(dev))
 169                 return -ENOSYS;
 170         else
 171                 return -ENOSYS;
 172 }
 173
 174 u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence)
 175 {
 176         if (is_tpm1(dev))
 177                 return tpm1_tsc_physical_presence(dev, presence);
 178
 179         /*
 180          * Nothing to do on TPM2 for this; use platform hierarchy availability
 181          * instead.
 182          */
 183         else if (is_tpm2(dev))
 184                 return 0;
 185         else
 186                 return -ENOSYS;
 187 }
 188
 189 u32 tpm_finalise_physical_presence(struct udevice *dev)
 190 {
 191         if (is_tpm1(dev))
 192                 return tpm1_finalise_physical_presence(dev);
 193
 194         /* Nothing needs to be done with tpm2 */
 195         else if (is_tpm2(dev))
 196                 return 0;
 197         else
 198                 return -ENOSYS;
 199 }
 200
 201 u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count)
 202 {
 203         if (is_tpm1(dev))
 204                 return tpm1_read_pubek(dev, data, count);
 205         else if (is_tpm2(dev))
 206                 return -ENOSYS; /* not implemented yet */
 207         else
 208                 return -ENOSYS;
 209 }
 210
 211 u32 tpm_force_clear(struct udevice *dev)
 212 {
 213         if (is_tpm1(dev))
 214                 return tpm1_force_clear(dev);
 215         else if (is_tpm2(dev))
 216                 return tpm2_clear(dev, TPM2_RH_PLATFORM, NULL, 0);
 217         else
 218                 return -ENOSYS;
 219 }
 220
 221 u32 tpm_physical_enable(struct udevice *dev)
 222 {
 223         if (is_tpm1(dev))
 224                 return tpm1_physical_enable(dev);
 225
 226         /* Nothing needs to be done with tpm2 */
 227         else if (is_tpm2(dev))
 228                 return 0;
 229         else
 230                 return -ENOSYS;
 231 }
 232
 233 u32 tpm_physical_disable(struct udevice *dev)
 234 {
 235         if (is_tpm1(dev))
 236                 return tpm1_physical_disable(dev);
 237
 238         /* Nothing needs to be done with tpm2 */
 239         else if (is_tpm2(dev))
 240                 return 0;
 241         else
 242                 return -ENOSYS;
 243 }
 244
 245 u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state)
 246 {
 247         if (is_tpm1(dev))
 248                 return tpm1_physical_set_deactivated(dev, state);
 249         /* Nothing needs to be done with tpm2 */
 250         else if (is_tpm2(dev))
 251                 return 0;
 252         else
 253                 return -ENOSYS;
 254 }
 255
 256 u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
 257                        void *cap, size_t count)
 258 {
 259         if (is_tpm1(dev))
 260                 return tpm1_get_capability(dev, cap_area, sub_cap, cap, count);
 261         else if (is_tpm2(dev))
 262                 return tpm2_get_capability(dev, cap_area, sub_cap, cap, count);
 263         else
 264                 return -ENOSYS;
 265 }
 266
 267 u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm)
 268 {
 269         if (is_tpm1(dev))
 270                 return tpm1_get_permissions(dev, index, perm);
 271         else if (is_tpm2(dev))
 272                 return -ENOSYS; /* not implemented yet */
 273         else
 274                 return -ENOSYS;
 275 }
 276
 277 u32 tpm_get_random(struct udevice *dev, void *data, u32 count)
 278 {
 279         if (is_tpm1(dev))
 280                 return tpm1_get_random(dev, data, count);
 281         else if (is_tpm2(dev))
 282                 return -ENOSYS; /* not implemented yet */
 283         else
 284                 return -ENOSYS;
 285 }