[PATCH v10 0/8] TPM 2.0 support

[Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>]

This patch set enables TPM2 protocol and provides drivers for FIFO and
CRB interfaces. This patch set does not export any sysfs attributes for
TPM 2.0 because existing sysfs attributes have three non-trivial issues:

- They are associated with the platform device instead of character
  device.
- They are are not trivial key-value pairs but contain text that is
  not easily parsed by a computer.
- Raciness as described in
  http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/

v2:
- Improved struct tpm_chip life-cycle by taking advantage of devres
  API.
- Refined sysfs attributes as simple key-values thereby not repeating
  mistakes in TPM1 sysfs attributes.
- Documented functions in tpm-chip.c and tpm2-cmd.c.
- Documented sysfs attributes.

v3:
- Lots of fixes in calling order in device drivers (thanks to Jason
  Gunthorpe for pointing these out!).
- Attach sysfs attributes to the misc device because it represents
  TPM device to the user space.

v4:
- Disable sysfs attibutes for TPM 2.0 for until we can sort out the 
  best approach for them.
- Fixed all the style issues found with checkpatch.pl.

v5:
- missing EXPORT_SYMBOL_GPL()
- own class for TPM devices used for TPM 2.0 devices and onwards.

v6:
- Non-racy initialization for sysfs attributes using struct device's
  groups field.
- The class 'tpm' is used now for all TPM devices. For the first device
  node major MISC_MAJOR and minor TPM_MINOR is used in order to retain
  backwards compatability.

v7:
- Release device number and free struct tpm_chip memory inside
  tpm_dev_release callback.
- Moved code from tpm-interface.c and tpm_dev.c to tpm-chip.c.

v8:
- Cleaned up unneeded cast from tpm_transmit_cmd().
- Cleaned up redundant PPI_VERSION_LEN constant from tpm_ppi.c.
- Fixed tpm_tis to use tpm2_calc_ordinal_duration() for TPM2 devices.
- tpm_crb: in crb_recv, check that count can hold the TPM header at
  minimum.
- tpm_crb: add enumerations for bit flags in start and cancel fields
  of the control area.
- tpm_crb: use ioremap() for command and response buffer because
  they might be anywhere.
- tpm_crb: use IO access functions for reading ioremapped buffers
  because using direct pointers is not portable.
- tpm_crb: only apply ACPI start if start method reported by the
  TPM2 ACPI table allows it.
- In tpm2_pcr_read() just calculate index and bit and get rid of
  hacky loop.
- Do not add sysfs attributes for TPM 2.0 devices.

v9:
- Fixed compilation issues in v8 (sorry for not using the correct
  tree).
- Just do "return tpm_chip_register();" instead of copying return
  value to a variable.
- Removed unused tpm2_startup().
- In the CRB driver ACPI TPM2 table could contain platform specific
  and therefore inequality test does not work. Fixed in this patch
  set.

v10:
- Fixed coccicheck and sparse errors and other reported style errors.
- Fixed build errors without CONFIG_ACPI.
- Fixed build error with CONFIG_OF.
- Added TPM_CHIP_FLAG_REGISTERED to mark successful tpm_chip_register().
  It is checked in the beginning of tpm_chip_unregister(), which is 
  called even when "attach" callback for a device fails because "detach"
  callback is always called.
- Added TPM_CHIP_FLAG_PPI to mark successful PPI interface lookup because 
  in older TPM chips version string might be non-existent.
- Check TPM version from the 4th byte of STS register after requesting 
  the locality because otherwise the read will return bogus data.
- Some TPM chips just give 0xff as the 4th byte so using that for detecting
  TPM family is unstable. Instead I chose the approach of using idempotent 
  TPM 2.x command to detect such case.

Jarkko Sakkinen (8):
  tpm: merge duplicate transmit_cmd() functions
  tpm: two-phase chip management functions
  tpm: fix raciness of PPI interface lookup
  tpm: rename chip->dev to chip->pdev
  tpm: device class for tpm
  tpm: TPM 2.0 baseline support
  tpm: TPM 2.0 CRB Interface
  tpm: TPM 2.0 FIFO Interface

 Documentation/ABI/stable/sysfs-class-tpm |  22 +-
 drivers/char/tpm/Kconfig                 |   9 +
 drivers/char/tpm/Makefile                |   3 +-
 drivers/char/tpm/tpm-chip.c              | 256 +++++++++++++
 drivers/char/tpm/tpm-dev.c               |  42 +--
 drivers/char/tpm/tpm-interface.c         | 263 +++++--------
 drivers/char/tpm/tpm-sysfs.c             |  29 +-
 drivers/char/tpm/tpm.h                   | 118 +++++-
 drivers/char/tpm/tpm2-cmd.c              | 617 +++++++++++++++++++++++++++++++
 drivers/char/tpm/tpm_atmel.c             |  25 +-
 drivers/char/tpm/tpm_crb.c               | 354 ++++++++++++++++++
 drivers/char/tpm/tpm_i2c_atmel.c         |  55 +--
 drivers/char/tpm/tpm_i2c_infineon.c      |  43 +--
 drivers/char/tpm/tpm_i2c_nuvoton.c       |  71 ++--
 drivers/char/tpm/tpm_i2c_stm_st33.c      |  32 +-
 drivers/char/tpm/tpm_ibmvtpm.c           |  17 +-
 drivers/char/tpm/tpm_infineon.c          |  51 +--
 drivers/char/tpm/tpm_nsc.c               |  34 +-
 drivers/char/tpm/tpm_ppi.c               | 141 ++++---
 drivers/char/tpm/tpm_tis.c               | 224 ++++++-----
 drivers/char/tpm/xen-tpmfront.c          |  14 +-
 21 files changed, 1820 insertions(+), 600 deletions(-)
 create mode 100644 drivers/char/tpm/tpm-chip.c
 create mode 100644 drivers/char/tpm/tpm2-cmd.c
 create mode 100644 drivers/char/tpm/tpm_crb.c

-- 
2.1.0