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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.c116
1 files changed, 69 insertions, 47 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index c50637db3a8a..e3f2915ca4be 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -328,8 +328,8 @@ EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration);
/*
* Internal kernel interface to transmit TPM commands
*/
-ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
- size_t bufsiz)
+ssize_t tpm_transmit(struct tpm_chip *chip, const u8 *buf, size_t bufsiz,
+ unsigned int flags)
{
ssize_t rc;
u32 count, ordinal;
@@ -343,16 +343,17 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
if (count == 0)
return -ENODATA;
if (count > bufsiz) {
- dev_err(chip->pdev,
+ dev_err(&chip->dev,
"invalid count value %x %zx\n", count, bufsiz);
return -E2BIG;
}
- mutex_lock(&chip->tpm_mutex);
+ if (!(flags & TPM_TRANSMIT_UNLOCKED))
+ mutex_lock(&chip->tpm_mutex);
rc = chip->ops->send(chip, (u8 *) buf, count);
if (rc < 0) {
- dev_err(chip->pdev,
+ dev_err(&chip->dev,
"tpm_transmit: tpm_send: error %zd\n", rc);
goto out;
}
@@ -371,7 +372,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
goto out_recv;
if (chip->ops->req_canceled(chip, status)) {
- dev_err(chip->pdev, "Operation Canceled\n");
+ dev_err(&chip->dev, "Operation Canceled\n");
rc = -ECANCELED;
goto out;
}
@@ -381,30 +382,31 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
} while (time_before(jiffies, stop));
chip->ops->cancel(chip);
- dev_err(chip->pdev, "Operation Timed out\n");
+ dev_err(&chip->dev, "Operation Timed out\n");
rc = -ETIME;
goto out;
out_recv:
rc = chip->ops->recv(chip, (u8 *) buf, bufsiz);
if (rc < 0)
- dev_err(chip->pdev,
+ dev_err(&chip->dev,
"tpm_transmit: tpm_recv: error %zd\n", rc);
out:
- mutex_unlock(&chip->tpm_mutex);
+ if (!(flags & TPM_TRANSMIT_UNLOCKED))
+ mutex_unlock(&chip->tpm_mutex);
return rc;
}
#define TPM_DIGEST_SIZE 20
#define TPM_RET_CODE_IDX 6
-ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd,
- int len, const char *desc)
+ssize_t tpm_transmit_cmd(struct tpm_chip *chip, const void *cmd,
+ int len, unsigned int flags, const char *desc)
{
- struct tpm_output_header *header;
+ const struct tpm_output_header *header;
int err;
- len = tpm_transmit(chip, (u8 *) cmd, len);
+ len = tpm_transmit(chip, (const u8 *)cmd, len, flags);
if (len < 0)
return len;
else if (len < TPM_HEADER_SIZE)
@@ -413,8 +415,9 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd,
header = cmd;
err = be32_to_cpu(header->return_code);
- if (err != 0 && desc)
- dev_err(chip->pdev, "A TPM error (%d) occurred %s\n", err,
+ if (err != 0 && err != TPM_ERR_DISABLED && err != TPM_ERR_DEACTIVATED
+ && desc)
+ dev_err(&chip->dev, "A TPM error (%d) occurred %s\n", err,
desc);
return err;
@@ -452,7 +455,8 @@ ssize_t tpm_getcap(struct device *dev, __be32 subcap_id, cap_t *cap,
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = subcap_id;
}
- rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc);
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
+ desc);
if (!rc)
*cap = tpm_cmd.params.getcap_out.cap;
return rc;
@@ -468,7 +472,7 @@ void tpm_gen_interrupt(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
- rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
"attempting to determine the timeouts");
}
EXPORT_SYMBOL_GPL(tpm_gen_interrupt);
@@ -489,7 +493,7 @@ static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
start_cmd.header.in = tpm_startup_header;
start_cmd.params.startup_in.startup_type = startup_type;
- return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
+ return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
"attempting to start the TPM");
}
@@ -505,12 +509,13 @@ int tpm_get_timeouts(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
- rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
+ NULL);
if (rc == TPM_ERR_INVALID_POSTINIT) {
/* The TPM is not started, we are the first to talk to it.
Execute a startup command. */
- dev_info(chip->pdev, "Issuing TPM_STARTUP");
+ dev_info(&chip->dev, "Issuing TPM_STARTUP");
if (tpm_startup(chip, TPM_ST_CLEAR))
return rc;
@@ -519,10 +524,10 @@ int tpm_get_timeouts(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
- NULL);
+ 0, NULL);
}
if (rc) {
- dev_err(chip->pdev,
+ dev_err(&chip->dev,
"A TPM error (%zd) occurred attempting to determine the timeouts\n",
rc);
goto duration;
@@ -561,7 +566,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
/* Report adjusted timeouts */
if (chip->vendor.timeout_adjusted) {
- dev_info(chip->pdev,
+ dev_info(&chip->dev,
HW_ERR "Adjusting reported timeouts: A %lu->%luus B %lu->%luus C %lu->%luus D %lu->%luus\n",
old_timeout[0], new_timeout[0],
old_timeout[1], new_timeout[1],
@@ -580,7 +585,7 @@ duration:
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_DURATION;
- rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
"attempting to determine the durations");
if (rc)
return rc;
@@ -608,7 +613,7 @@ duration:
chip->vendor.duration[TPM_MEDIUM] *= 1000;
chip->vendor.duration[TPM_LONG] *= 1000;
chip->vendor.duration_adjusted = true;
- dev_info(chip->pdev, "Adjusting TPM timeout parameters.");
+ dev_info(&chip->dev, "Adjusting TPM timeout parameters.");
}
return 0;
}
@@ -636,7 +641,7 @@ static int tpm_continue_selftest(struct tpm_chip *chip)
struct tpm_cmd_t cmd;
cmd.header.in = continue_selftest_header;
- rc = tpm_transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE,
+ rc = tpm_transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE, 0,
"continue selftest");
return rc;
}
@@ -656,7 +661,7 @@ int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
cmd.header.in = pcrread_header;
cmd.params.pcrread_in.pcr_idx = cpu_to_be32(pcr_idx);
- rc = tpm_transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE,
+ rc = tpm_transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE, 0,
"attempting to read a pcr value");
if (rc == 0)
@@ -683,7 +688,7 @@ int tpm_is_tpm2(u32 chip_num)
rc = (chip->flags & TPM_CHIP_FLAG_TPM2) != 0;
- tpm_chip_put(chip);
+ tpm_put_ops(chip);
return rc;
}
@@ -712,7 +717,7 @@ int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf)
rc = tpm2_pcr_read(chip, pcr_idx, res_buf);
else
rc = tpm_pcr_read_dev(chip, pcr_idx, res_buf);
- tpm_chip_put(chip);
+ tpm_put_ops(chip);
return rc;
}
EXPORT_SYMBOL_GPL(tpm_pcr_read);
@@ -747,17 +752,17 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
if (chip->flags & TPM_CHIP_FLAG_TPM2) {
rc = tpm2_pcr_extend(chip, pcr_idx, hash);
- tpm_chip_put(chip);
+ tpm_put_ops(chip);
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, &cmd, EXTEND_PCR_RESULT_SIZE,
+ rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE, 0,
"attempting extend a PCR value");
- tpm_chip_put(chip);
+ tpm_put_ops(chip);
return rc;
}
EXPORT_SYMBOL_GPL(tpm_pcr_extend);
@@ -783,6 +788,10 @@ int tpm_do_selftest(struct tpm_chip *chip)
loops = jiffies_to_msecs(duration) / delay_msec;
rc = tpm_continue_selftest(chip);
+ if (rc == TPM_ERR_INVALID_POSTINIT) {
+ chip->flags |= TPM_CHIP_FLAG_ALWAYS_POWERED;
+ dev_info(&chip->dev, "TPM not ready (%d)\n", rc);
+ }
/* This may fail if there was no TPM driver during a suspend/resume
* cycle; some may return 10 (BAD_ORDINAL), others 28 (FAILEDSELFTEST)
*/
@@ -793,12 +802,14 @@ int tpm_do_selftest(struct tpm_chip *chip)
/* Attempt to read a PCR value */
cmd.header.in = pcrread_header;
cmd.params.pcrread_in.pcr_idx = cpu_to_be32(0);
- rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE);
+ rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE, 0);
/* Some buggy TPMs will not respond to tpm_tis_ready() for
* around 300ms while the self test is ongoing, keep trying
* until the self test duration expires. */
if (rc == -ETIME) {
- dev_info(chip->pdev, HW_ERR "TPM command timed out during continue self test");
+ dev_info(
+ &chip->dev, HW_ERR
+ "TPM command timed out during continue self test");
msleep(delay_msec);
continue;
}
@@ -808,7 +819,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
rc = be32_to_cpu(cmd.header.out.return_code);
if (rc == TPM_ERR_DISABLED || rc == TPM_ERR_DEACTIVATED) {
- dev_info(chip->pdev,
+ dev_info(&chip->dev,
"TPM is disabled/deactivated (0x%X)\n", rc);
/* TPM is disabled and/or deactivated; driver can
* proceed and TPM does handle commands for
@@ -834,9 +845,9 @@ int tpm_send(u32 chip_num, void *cmd, size_t buflen)
if (chip == NULL)
return -ENODEV;
- rc = tpm_transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd");
+ rc = tpm_transmit_cmd(chip, cmd, buflen, 0, "attempting tpm_cmd");
- tpm_chip_put(chip);
+ tpm_put_ops(chip);
return rc;
}
EXPORT_SYMBOL_GPL(tpm_send);
@@ -925,6 +936,9 @@ int tpm_pm_suspend(struct device *dev)
if (chip == NULL)
return -ENODEV;
+ if (chip->flags & TPM_CHIP_FLAG_ALWAYS_POWERED)
+ return 0;
+
if (chip->flags & TPM_CHIP_FLAG_TPM2) {
tpm2_shutdown(chip, TPM2_SU_STATE);
return 0;
@@ -936,14 +950,15 @@ int tpm_pm_suspend(struct device *dev)
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, &cmd, EXTEND_PCR_RESULT_SIZE,
+ rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE, 0,
"extending dummy pcr before suspend");
}
/* now do the actual savestate */
for (try = 0; try < TPM_RETRY; try++) {
cmd.header.in = savestate_header;
- rc = tpm_transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL);
+ rc = tpm_transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, 0,
+ NULL);
/*
* If the TPM indicates that it is too busy to respond to
@@ -961,10 +976,10 @@ int tpm_pm_suspend(struct device *dev)
}
if (rc)
- dev_err(chip->pdev,
+ dev_err(&chip->dev,
"Error (%d) sending savestate before suspend\n", rc);
else if (try > 0)
- dev_warn(chip->pdev, "TPM savestate took %dms\n",
+ dev_warn(&chip->dev, "TPM savestate took %dms\n",
try * TPM_TIMEOUT_RETRY);
return rc;
@@ -1018,7 +1033,7 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
if (chip->flags & TPM_CHIP_FLAG_TPM2) {
err = tpm2_get_random(chip, out, max);
- tpm_chip_put(chip);
+ tpm_put_ops(chip);
return err;
}
@@ -1027,12 +1042,17 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes);
err = tpm_transmit_cmd(chip, &tpm_cmd,
- TPM_GETRANDOM_RESULT_SIZE + num_bytes,
- "attempting get random");
+ TPM_GETRANDOM_RESULT_SIZE + num_bytes,
+ 0, "attempting get random");
if (err)
break;
recd = be32_to_cpu(tpm_cmd.params.getrandom_out.rng_data_len);
+ if (recd > num_bytes) {
+ total = -EFAULT;
+ break;
+ }
+
memcpy(dest, tpm_cmd.params.getrandom_out.rng_data, recd);
dest += recd;
@@ -1040,7 +1060,7 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
num_bytes -= recd;
} while (retries-- && total < max);
- tpm_chip_put(chip);
+ tpm_put_ops(chip);
return total ? total : -EIO;
}
EXPORT_SYMBOL_GPL(tpm_get_random);
@@ -1066,7 +1086,7 @@ int tpm_seal_trusted(u32 chip_num, struct trusted_key_payload *payload,
rc = tpm2_seal_trusted(chip, payload, options);
- tpm_chip_put(chip);
+ tpm_put_ops(chip);
return rc;
}
EXPORT_SYMBOL_GPL(tpm_seal_trusted);
@@ -1092,7 +1112,8 @@ int tpm_unseal_trusted(u32 chip_num, struct trusted_key_payload *payload,
rc = tpm2_unseal_trusted(chip, payload, options);
- tpm_chip_put(chip);
+ tpm_put_ops(chip);
+
return rc;
}
EXPORT_SYMBOL_GPL(tpm_unseal_trusted);
@@ -1119,6 +1140,7 @@ static int __init tpm_init(void)
static void __exit tpm_exit(void)
{
+ idr_destroy(&dev_nums_idr);
class_destroy(tpm_class);
unregister_chrdev_region(tpm_devt, TPM_NUM_DEVICES);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-10 19:04:25 +0000