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[v11,0/4] dd Loongson Security Engine chip driver

Message ID 20250619025138.2854-1-zhaoqunqin@loongson.cn
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Series dd Loongson Security Engine chip driver | expand

Message

Qunqin Zhao June 19, 2025, 2:51 a.m. UTC 
The Loongson Security Engine chip supports RNG, SM2, SM3 and SM4
accelerator engines. Each engine have its own DMA buffer provided
by the controller. The kernel cannot directly send commands to the
engine and must first send them to the controller, which will
forward them to the corresponding engine. Based on these engines,
TPM2 have been implemented in the chip, then let's treat TPM2 itself
as an engine.

v11: Put all updates to the MAINTAINERS in one patch
     crypto: statically initialize rng_devices.lock, use this lock in
             loongson_rng_probe().

v10: mfd: Cleanned up coding style.
     crypto: Unlimited tfm
     tpm: Added error check

v9: Moved the base driver back to drivers/mfd. Cleanned up coding style.

v8: Like Lee said, the base driver goes beyond MFD scope. Since these
    are all encryption related drivers and SM2, SM3, and SM4 drivers
    will be added to the crypto subsystem in the future, the base driver
    need to be changed when adding these drivers. Therefore, it may be
    more appropriate to place the base driver within the crypto
    subsystem.

    Removed complete callback in all driver. Removed the concepts of
    "channel", "msg" and "request" as they may be confusing. Used the
    concepts of "egnine" and "command" may be better.

v7: Addressed Huacai's comments.

v6: mfd :MFD_LS6000SE -> MFD_LOONGSON_SE,  ls6000se.c -> loongson-se.c

    crypto :CRYPTO_DEV_LS6000SE_RNG -> CRYPTO_DEV_LOONGSON_RNG,
    ls6000se-rng.c ->loongson-rng.c

    tpm: TCG_LSSE -> TCG_LOONGSON, tpm_lsse.c ->tpm_loongson.c

v5: mfd: Registered "ls6000se-rng" device in mfd driver
    tpm: Prefix all with tpm_loongson instead of tpm_lsse.
         Replace all "ls6000se" with "loongson"

v4: tpm: Removed MODULE_AUTHOR fields.
         Prefix all with tpm_lsse instead of tpm.

v3: Put the updates to the MAINTAINERS in a separate patch.
    tpm: Added reminder about Loongson security engine to git log.

v2: Removed misc driver. Added tpm driver.

Qunqin Zhao (4):
  mfd: Add support for Loongson Security Engine chip controller
  crypto: loongson - add Loongson RNG driver support
  tpm: Add a driver for Loongson TPM device
  MAINTAINERS: Add entry for Loongson Security Engine drivers

 MAINTAINERS                            |   9 +
 drivers/char/tpm/Kconfig               |   9 +
 drivers/char/tpm/Makefile              |   1 +
 drivers/char/tpm/tpm_loongson.c        |  84 ++++++++
 drivers/crypto/Kconfig                 |   1 +
 drivers/crypto/Makefile                |   1 +
 drivers/crypto/loongson/Kconfig        |   5 +
 drivers/crypto/loongson/Makefile       |   1 +
 drivers/crypto/loongson/loongson-rng.c | 209 ++++++++++++++++++++
 drivers/mfd/Kconfig                    |  11 ++
 drivers/mfd/Makefile                   |   2 +
 drivers/mfd/loongson-se.c              | 253 +++++++++++++++++++++++++
 include/linux/mfd/loongson-se.h        |  53 ++++++
 13 files changed, 639 insertions(+)
 create mode 100644 drivers/char/tpm/tpm_loongson.c
 create mode 100644 drivers/crypto/loongson/Kconfig
 create mode 100644 drivers/crypto/loongson/Makefile
 create mode 100644 drivers/crypto/loongson/loongson-rng.c
 create mode 100644 drivers/mfd/loongson-se.c
 create mode 100644 include/linux/mfd/loongson-se.h


base-commit: 52da431bf03b5506203bca27fe14a97895c80faf