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path: root/drivers/char/tpm/tpm-interface.c
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Diffstat (limited to 'drivers/char/tpm/tpm-interface.c')
-rw-r--r--drivers/char/tpm/tpm-interface.c118
1 files changed, 65 insertions, 53 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 158c1db83f05..d2b4df6d9894 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -416,7 +416,8 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space,
/* Store the decision as chip->locality will be changed. */
need_locality = chip->locality == -1;
- if (need_locality && chip->ops->request_locality) {
+ if (!(flags & TPM_TRANSMIT_RAW) &&
+ need_locality && chip->ops->request_locality) {
rc = chip->ops->request_locality(chip, 0);
if (rc < 0)
goto out_no_locality;
@@ -429,8 +430,9 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space,
rc = chip->ops->send(chip, (u8 *) buf, count);
if (rc < 0) {
- dev_err(&chip->dev,
- "tpm_transmit: tpm_send: error %d\n", rc);
+ if (rc != -EPIPE)
+ dev_err(&chip->dev,
+ "%s: tpm_send: error %d\n", __func__, rc);
goto out;
}
@@ -536,59 +538,62 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
return 0;
}
+EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
#define TPM_DIGEST_SIZE 20
#define TPM_RET_CODE_IDX 6
#define TPM_INTERNAL_RESULT_SIZE 200
-#define TPM_ORD_GET_CAP cpu_to_be32(101)
-#define TPM_ORD_GET_RANDOM cpu_to_be32(70)
+#define TPM_ORD_GET_CAP 101
+#define TPM_ORD_GET_RANDOM 70
static const struct tpm_input_header tpm_getcap_header = {
- .tag = TPM_TAG_RQU_COMMAND,
+ .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
.length = cpu_to_be32(22),
- .ordinal = TPM_ORD_GET_CAP
+ .ordinal = cpu_to_be32(TPM_ORD_GET_CAP)
};
ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
const char *desc, size_t min_cap_length)
{
- struct tpm_cmd_t tpm_cmd;
+ struct tpm_buf buf;
int rc;
- tpm_cmd.header.in = tpm_getcap_header;
+ rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_GET_CAP);
+ if (rc)
+ return rc;
+
if (subcap_id == TPM_CAP_VERSION_1_1 ||
subcap_id == TPM_CAP_VERSION_1_2) {
- tpm_cmd.params.getcap_in.cap = cpu_to_be32(subcap_id);
- /*subcap field not necessary */
- tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(0);
- tpm_cmd.header.in.length -= cpu_to_be32(sizeof(__be32));
+ tpm_buf_append_u32(&buf, subcap_id);
+ tpm_buf_append_u32(&buf, 0);
} else {
if (subcap_id == TPM_CAP_FLAG_PERM ||
subcap_id == TPM_CAP_FLAG_VOL)
- tpm_cmd.params.getcap_in.cap =
- cpu_to_be32(TPM_CAP_FLAG);
+ tpm_buf_append_u32(&buf, TPM_CAP_FLAG);
else
- tpm_cmd.params.getcap_in.cap =
- cpu_to_be32(TPM_CAP_PROP);
- tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
- tpm_cmd.params.getcap_in.subcap = cpu_to_be32(subcap_id);
+ tpm_buf_append_u32(&buf, TPM_CAP_PROP);
+
+ tpm_buf_append_u32(&buf, 4);
+ tpm_buf_append_u32(&buf, subcap_id);
}
- rc = tpm_transmit_cmd(chip, NULL, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE,
min_cap_length, 0, desc);
if (!rc)
- *cap = tpm_cmd.params.getcap_out.cap;
+ *cap = *(cap_t *)&buf.data[TPM_HEADER_SIZE + 4];
+
+ tpm_buf_destroy(&buf);
return rc;
}
EXPORT_SYMBOL_GPL(tpm_getcap);
-#define TPM_ORD_STARTUP cpu_to_be32(153)
+#define TPM_ORD_STARTUP 153
#define TPM_ST_CLEAR cpu_to_be16(1)
#define TPM_ST_STATE cpu_to_be16(2)
#define TPM_ST_DEACTIVATED cpu_to_be16(3)
static const struct tpm_input_header tpm_startup_header = {
- .tag = TPM_TAG_RQU_COMMAND,
+ .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
.length = cpu_to_be32(12),
- .ordinal = TPM_ORD_STARTUP
+ .ordinal = cpu_to_be32(TPM_ORD_STARTUP)
};
static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
@@ -737,7 +742,7 @@ EXPORT_SYMBOL_GPL(tpm_get_timeouts);
#define CONTINUE_SELFTEST_RESULT_SIZE 10
static const struct tpm_input_header continue_selftest_header = {
- .tag = TPM_TAG_RQU_COMMAND,
+ .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
.length = cpu_to_be32(10),
.ordinal = cpu_to_be32(TPM_ORD_CONTINUE_SELFTEST),
};
@@ -760,13 +765,13 @@ static int tpm_continue_selftest(struct tpm_chip *chip)
return rc;
}
-#define TPM_ORDINAL_PCRREAD cpu_to_be32(21)
+#define TPM_ORDINAL_PCRREAD 21
#define READ_PCR_RESULT_SIZE 30
#define READ_PCR_RESULT_BODY_SIZE 20
static const struct tpm_input_header pcrread_header = {
- .tag = TPM_TAG_RQU_COMMAND,
+ .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
.length = cpu_to_be32(14),
- .ordinal = TPM_ORDINAL_PCRREAD
+ .ordinal = cpu_to_be32(TPM_ORDINAL_PCRREAD)
};
int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
@@ -838,15 +843,34 @@ int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf)
}
EXPORT_SYMBOL_GPL(tpm_pcr_read);
-#define TPM_ORD_PCR_EXTEND cpu_to_be32(20)
+#define TPM_ORD_PCR_EXTEND 20
#define EXTEND_PCR_RESULT_SIZE 34
#define EXTEND_PCR_RESULT_BODY_SIZE 20
static const struct tpm_input_header pcrextend_header = {
- .tag = TPM_TAG_RQU_COMMAND,
+ .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
.length = cpu_to_be32(34),
- .ordinal = TPM_ORD_PCR_EXTEND
+ .ordinal = cpu_to_be32(TPM_ORD_PCR_EXTEND)
};
+static int tpm1_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash,
+ char *log_msg)
+{
+ struct tpm_buf buf;
+ int rc;
+
+ rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_PCR_EXTEND);
+ if (rc)
+ return rc;
+
+ tpm_buf_append_u32(&buf, pcr_idx);
+ tpm_buf_append(&buf, hash, TPM_DIGEST_SIZE);
+
+ rc = tpm_transmit_cmd(chip, NULL, buf.data, EXTEND_PCR_RESULT_SIZE,
+ EXTEND_PCR_RESULT_BODY_SIZE, 0, log_msg);
+ tpm_buf_destroy(&buf);
+ return rc;
+}
+
/**
* tpm_pcr_extend - extend pcr value with hash
* @chip_num: tpm idx # or AN&
@@ -859,7 +883,6 @@ static const struct tpm_input_header pcrextend_header = {
*/
int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
{
- struct tpm_cmd_t cmd;
int rc;
struct tpm_chip *chip;
struct tpm2_digest digest_list[ARRAY_SIZE(chip->active_banks)];
@@ -885,13 +908,8 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
return rc;
}
- cmd.header.in = pcrextend_header;
- cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx);
- memcpy(cmd.params.pcrextend_in.hash, hash, TPM_DIGEST_SIZE);
- rc = tpm_transmit_cmd(chip, NULL, &cmd, EXTEND_PCR_RESULT_SIZE,
- EXTEND_PCR_RESULT_BODY_SIZE, 0,
- "attempting extend a PCR value");
-
+ rc = tpm1_pcr_extend(chip, pcr_idx, hash,
+ "attempting extend a PCR value");
tpm_put_ops(chip);
return rc;
}
@@ -1060,13 +1078,13 @@ again:
}
EXPORT_SYMBOL_GPL(wait_for_tpm_stat);
-#define TPM_ORD_SAVESTATE cpu_to_be32(152)
+#define TPM_ORD_SAVESTATE 152
#define SAVESTATE_RESULT_SIZE 10
static const struct tpm_input_header savestate_header = {
- .tag = TPM_TAG_RQU_COMMAND,
+ .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
.length = cpu_to_be32(10),
- .ordinal = TPM_ORD_SAVESTATE
+ .ordinal = cpu_to_be32(TPM_ORD_SAVESTATE)
};
/*
@@ -1090,15 +1108,9 @@ int tpm_pm_suspend(struct device *dev)
}
/* for buggy tpm, flush pcrs with extend to selected dummy */
- if (tpm_suspend_pcr) {
- cmd.header.in = pcrextend_header;
- cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(tpm_suspend_pcr);
- memcpy(cmd.params.pcrextend_in.hash, dummy_hash,
- TPM_DIGEST_SIZE);
- rc = tpm_transmit_cmd(chip, NULL, &cmd, EXTEND_PCR_RESULT_SIZE,
- EXTEND_PCR_RESULT_BODY_SIZE, 0,
- "extending dummy pcr before suspend");
- }
+ if (tpm_suspend_pcr)
+ rc = tpm1_pcr_extend(chip, tpm_suspend_pcr, dummy_hash,
+ "extending dummy pcr before suspend");
/* now do the actual savestate */
for (try = 0; try < TPM_RETRY; try++) {
@@ -1149,9 +1161,9 @@ EXPORT_SYMBOL_GPL(tpm_pm_resume);
#define TPM_GETRANDOM_RESULT_SIZE 18
static const struct tpm_input_header tpm_getrandom_header = {
- .tag = TPM_TAG_RQU_COMMAND,
+ .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
.length = cpu_to_be32(14),
- .ordinal = TPM_ORD_GET_RANDOM
+ .ordinal = cpu_to_be32(TPM_ORD_GET_RANDOM)
};
/**