u-boot.git/include/tpm-common.h, branch v2020.01

tpm: Export tpm_clear_and_reenable()

2018-12-05T13:01:34+00:00

This function is intended to be exported but is not. Add it to the header
file.

Signed-off-by: Simon Glass

tpm: Remove use of build-time TPM versions

2018-12-05T13:01:34+00:00

There is only one place in the code which assumes at build-time that we
are using either a v1 or a v2 TPM. Fix this up and add a new function to
return the version of a TPM.

Supported TPM versions (v1 and v2) can be enabled independently and it is
possible to use both versions at once. This is useful for sandbox when
running tests.

Signed-off-by: Simon Glass

tpm: Convert to use a device parameter

2018-11-29T16:30:06+00:00

At present many TPM calls assume there is only one TPM in the system and
look up this TPM themselves. This is inconsistent with driver model, which
expects all driver methods to have a device parameter. Update the code to
correct this.

Signed-off-by: Simon Glass

tpm: Export the open/close functions

2018-11-29T16:30:06+00:00

At present these functions are not accessible outside the TPM library, but
in some cases we need to call them. Export them in the header file and add
a define for the SHA1 digest size.

Also adjust tpm_open() to call tpm_close() first so that the TPM is in a
known state before opening (e.g. by a previous phase of U-Boot).

Signed-off-by: Simon Glass

tpm: Add a constant for the minimum supported digest size

2018-11-29T16:30:06+00:00

When SHA1 is used we need 20 bytes for the digest size. Add a constant so
that clients can make use of this, e.g. to allocate local buffers.

Signed-off-by: Simon Glass

tpm: allow TPM v1 and v2 to be compiled at the same time

2018-07-28T15:57:38+00:00

While there is probably no reason to do so in a real life situation, it
will allow to compile test both stacks with the same sandbox defconfig.

As we cannot define two 'tpm' commands at the same time, the command for
TPM v1 is still called 'tpm' and the one for TPM v2 'tpm2'. While this
is the exact command name that must be written into eg. test files, any
user already using the TPM v2 stack can continue to do so by just writing
'tpm' because as long as TPM v1 support is not compiled, U-Boot prompt
will search for the closest command named after 'tpm'.

The command set can also be changed at runtime (not supported yet, but
ready to be), but as one can compile only either one stack or the other,
there is still one spot in the code where conditionals are used: to
retrieve the v1 or v2 command set.

Signed-off-by: Miquel Raynal 
Reviewed-by: Simon Glass 
[trini: In sandbox_tpm2_fill_buf() use NULL not \0 to ensure NULL
terminated string due to LLVM warning]
Signed-off-by: Tom Rini

tpm: fix typo in kernel doc

2018-07-28T15:55:31+00:00

The udevice given to the open() function of course must be opened,
not closed.

Signed-off-by: Miquel Raynal 
Reviewed-by: Simon Glass

tpm: prepare support for TPMv2.x commands

2018-05-26T00:12:55+00:00

Choice between v1 and v2 compliant functions is done with the
configuration.

Create the various files that will receive TPMv2-only code on the same
scheme as for the TPMv1 code.

Signed-off-by: Miquel Raynal 
Reviewed-by: Simon Glass 
Reviewed-by: Tom Rini

tpm: add missing parameter in private data structure description

2018-05-26T00:12:55+00:00

Both parameters 'duration_ms' and 'retry_time_ms' of the tpm_chip_priv
structure are documented is the comment above the declaration but 'buf'
was forgotten. Add the missing description.

Signed-off-by: Miquel Raynal 
Reviewed-by: Tom Rini 
Reviewed-by: Simon Glass

tpm: disociate TPMv1.x specific and generic code

2018-05-26T00:12:55+00:00

There are no changes in this commit but a new organization of the code
as follow.

* cmd/ directory:
        > move existing code from cmd/tpm.c in cmd/tpm-common.c
	> move specific code in cmd/tpm-v1.c
	> create a specific header file with generic definitions for
	  commands only called cmd/tpm-user-utils.h

* lib/ directory:
        > move existing code from lib/tpm.c in lib/tpm-common.c
	> move specific code in lib/tpm-v1.c
	> create a specific header file with generic definitions for
	  the library itself called lib/tpm-utils.h

* include/ directory:
        > move existing code from include/tpm.h in include/tpm-common.h
	> move specific code in include/tpm-v1.h

Code designated as 'common' is compiled if TPM are used. Code designated
as 'specific' is compiled only if the right specification has been
selected.

All files include tpm-common.h.
Files in cmd/ include tpm-user-utils.h.
Files in lib/ include tpm-utils.h.
Depending on the specification, files may include either (not both)
tpm-v1.h or tpm-v2.h.

Signed-off-by: Miquel Raynal 
Reviewed-by: Tom Rini 
[trini: Fix a few more cases of tpm.h -> tpm-v1.h, some Kconfig logic]
Signed-off-by: Tom Rini