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Message-Id: <1410629733-10105-1-git-send-email-jarkko.sakkinen@linux.intel.com> Date: Sat, 13 Sep 2014 20:35:33 +0300 From: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com> To: tpmdd-devel@...ts.sourceforge.net Cc: Peter Huewe <peterhuewe@....de>, Marcel Selhorst <tpmdd@...horst.net>, linux-kernel@...r.kernel.org, jgunthorpe@...idianresearch.com, Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com> Subject: [PATCH] tpm: merge duplicate transmit_cmd() functions Replaced transmit_cmd() functions in tpm-interface.c and tpm-sysfs.c with a single tpm_transmit_cmd() that can be used in both files. This patch is preliminary clean up work for the TPM2 support. This function is needed for implementing TPM2 versions of the in-kernel TPM utility functions. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com> --- drivers/char/tpm/tpm-interface.c | 44 ++++++++++++++++++++-------------------- drivers/char/tpm/tpm-sysfs.c | 23 ++------------------- drivers/char/tpm/tpm.h | 2 ++ 3 files changed, 26 insertions(+), 43 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 6af1700..f638f9d 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -398,8 +398,8 @@ out: #define TPM_DIGEST_SIZE 20 #define TPM_RET_CODE_IDX 6 -static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd, - int len, const char *desc) +ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd, + int len, const char *desc) { int err; @@ -448,7 +448,7 @@ 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 = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc); + rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc); if (!rc) *cap = tpm_cmd.params.getcap_out.cap; return rc; @@ -464,8 +464,8 @@ 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 = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, - "attempting to determine the timeouts"); + rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, + "attempting to determine the timeouts"); } EXPORT_SYMBOL_GPL(tpm_gen_interrupt); @@ -484,8 +484,8 @@ static int tpm_startup(struct tpm_chip *chip, __be16 startup_type) struct tpm_cmd_t start_cmd; start_cmd.header.in = tpm_startup_header; start_cmd.params.startup_in.startup_type = startup_type; - return transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE, - "attempting to start the TPM"); + return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE, + "attempting to start the TPM"); } int tpm_get_timeouts(struct tpm_chip *chip) @@ -500,7 +500,7 @@ 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 = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL); + rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL); if (rc == TPM_ERR_INVALID_POSTINIT) { /* The TPM is not started, we are the first to talk to it. @@ -513,7 +513,7 @@ 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 = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, + rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL); } if (rc) { @@ -575,8 +575,8 @@ duration: tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4); tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_DURATION; - rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, - "attempting to determine the durations"); + rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, + "attempting to determine the durations"); if (rc) return rc; @@ -631,8 +631,8 @@ static int tpm_continue_selftest(struct tpm_chip *chip) struct tpm_cmd_t cmd; cmd.header.in = continue_selftest_header; - rc = transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE, - "continue selftest"); + rc = tpm_transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE, + "continue selftest"); return rc; } @@ -672,8 +672,8 @@ 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 = transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE, - "attempting to read a pcr value"); + rc = tpm_transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE, + "attempting to read a pcr value"); if (rc == 0) memcpy(res_buf, cmd.params.pcrread_out.pcr_result, @@ -737,8 +737,8 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) 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 = transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE, - "attempting extend a PCR value"); + rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE, + "attempting extend a PCR value"); tpm_chip_put(chip); return rc; @@ -817,7 +817,7 @@ int tpm_send(u32 chip_num, void *cmd, size_t buflen) if (chip == NULL) return -ENODEV; - rc = transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd"); + rc = tpm_transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd"); tpm_chip_put(chip); return rc; @@ -938,14 +938,14 @@ 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 = transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE, - "extending dummy pcr before suspend"); + rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE, + "extending dummy pcr before suspend"); } /* now do the actual savestate */ for (try = 0; try < TPM_RETRY; try++) { cmd.header.in = savestate_header; - rc = transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL); + rc = tpm_transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL); /* * If the TPM indicates that it is too busy to respond to @@ -1022,7 +1022,7 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max) tpm_cmd.header.in = tpm_getrandom_header; tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes); - err = transmit_cmd(chip, &tpm_cmd, + err = tpm_transmit_cmd(chip, &tpm_cmd, TPM_GETRANDOM_RESULT_SIZE + num_bytes, "attempting get random"); if (err) diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c index 01730a2..8ecb052 100644 --- a/drivers/char/tpm/tpm-sysfs.c +++ b/drivers/char/tpm/tpm-sysfs.c @@ -20,25 +20,6 @@ #include <linux/device.h> #include "tpm.h" -/* XXX for now this helper is duplicated in tpm-interface.c */ -static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd, - int len, const char *desc) -{ - int err; - - len = tpm_transmit(chip, (u8 *) cmd, len); - if (len < 0) - return len; - else if (len < TPM_HEADER_SIZE) - return -EFAULT; - - err = be32_to_cpu(cmd->header.out.return_code); - if (err != 0 && desc) - dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc); - - return err; -} - #define READ_PUBEK_RESULT_SIZE 314 #define TPM_ORD_READPUBEK cpu_to_be32(124) static struct tpm_input_header tpm_readpubek_header = { @@ -58,8 +39,8 @@ static ssize_t pubek_show(struct device *dev, struct device_attribute *attr, struct tpm_chip *chip = dev_get_drvdata(dev); tpm_cmd.header.in = tpm_readpubek_header; - err = transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE, - "attempting to read the PUBEK"); + err = tpm_transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE, + "attempting to read the PUBEK"); if (err) goto out; diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index e4d0888..d893335 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -317,6 +317,8 @@ ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *); ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf, size_t bufsiz); +ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd, + int len, const char *desc); extern int tpm_get_timeouts(struct tpm_chip *); extern void tpm_gen_interrupt(struct tpm_chip *); extern int tpm_do_selftest(struct tpm_chip *); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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