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tpm: Make chip->{status,cancel,req_canceled} opt

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tpm_ftpm_tee does not require chip->status, chip->cancel and
chip->req_canceled. Make them optional.

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@opinsys.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
This commit is contained in:
Jarkko Sakkinen 2025-03-26 17:55:49 +02:00 • committed by Jarkko Sakkinen
parent 372f97a24a
commit 980a573621
2 changed files with 27 additions and 23 deletions
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30
drivers/char/tpm/tpm-interface.c
View file

@ -58,6 +58,30 @@ unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
}
EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration);
static void tpm_chip_cancel(struct tpm_chip *chip)
{
if (!chip->ops->cancel)
return;
chip->ops->cancel(chip);
}
static u8 tpm_chip_status(struct tpm_chip *chip)
{
if (!chip->ops->status)
return 0;
return chip->ops->status(chip);
}
static bool tpm_chip_req_canceled(struct tpm_chip *chip, u8 status)
{
if (!chip->ops->req_canceled)
return false;
return chip->ops->req_canceled(chip, status);
}
static ssize_t tpm_try_transmit(struct tpm_chip *chip, void *buf, size_t bufsiz)
{
struct tpm_header *header = buf;
@ -104,12 +128,12 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, void *buf, size_t bufsiz)
stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
do {
u8 status = chip->ops->status(chip);
u8 status = tpm_chip_status(chip);
if ((status & chip->ops->req_complete_mask) ==
chip->ops->req_complete_val)
goto out_recv;
if (chip->ops->req_canceled(chip, status)) {
if (tpm_chip_req_canceled(chip, status)) {
dev_err(&chip->dev, "Operation Canceled\n");
return -ECANCELED;
}
@ -118,7 +142,7 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, void *buf, size_t bufsiz)
rmb();
} while (time_before(jiffies, stop));
chip->ops->cancel(chip);
tpm_chip_cancel(chip);
dev_err(&chip->dev, "Operation Timed out\n");
return -ETIME;

20
drivers/char/tpm/tpm_ftpm_tee.c
View file

@ -164,30 +164,10 @@ static int ftpm_tee_tpm_op_send(struct tpm_chip *chip, u8 *buf, size_t len)
return 0;
}
static void ftpm_tee_tpm_op_cancel(struct tpm_chip *chip)
{
/* not supported */
}
static u8 ftpm_tee_tpm_op_status(struct tpm_chip *chip)
{
return 0;
}
static bool ftpm_tee_tpm_req_canceled(struct tpm_chip *chip, u8 status)
{
return false;
}
static const struct tpm_class_ops ftpm_tee_tpm_ops = {
.flags = TPM_OPS_AUTO_STARTUP,
.recv = ftpm_tee_tpm_op_recv,
.send = ftpm_tee_tpm_op_send,
.cancel = ftpm_tee_tpm_op_cancel,
.status = ftpm_tee_tpm_op_status,
.req_complete_mask = 0,
.req_complete_val = 0,
.req_canceled = ftpm_tee_tpm_req_canceled,
};
/*