[v1,0/4] LoongArch: Add Loongson-2K0500 BMC support

Message

Binbin Zhou Dec. 30, 2024, 9:31 a.m. UTC

Hi all:

This patch set introduces the Loongson-2K0500 BMC.

It is a PCIe device present on servers similar to the Loongson-3C6000.
And it is a multifunctional device (MFD), such as display as a sub-function
of it.

For IPMI, according to the existing design, we use software simulation to
implement the KCS interface registers: Stauts/Command/Data_Out/Data_In.

Also since both host side and BMC side read and write kcs status, we use
fifo pointer to ensure data consistency.

For the display, based on simpledrm, the resolution is read from a fixed
position in the BMC since the hardware does not support auto-detection
of the resolution. Of course, we will try to support multiple
resolutions later, through a vbios-like approach.

Especially, for the BMC reset function, since the display will be
disconnected when BMC reset, we made a special treatment of re-push.

Based on this, I will present it in four patches:
patch-1: BMC device PCI resource allocation.
patch-2: IPMI implementation
patch-3: display, based on simpledrm
patch-4: BMC reboot support

Thanks.

Binbin Zhou (4):
  mfd: ls2kbmc: Introduce Loongson-2K BMC MFD Core driver
  ipmi: Add Loongson-2K BMC support
  drm/ls2kbmc: Add support for Loongson-2K BMC display
  drm/ls2kbmc: Add Loongson-2K BMC reset function support

 drivers/char/ipmi/Makefile       |   1 +
 drivers/char/ipmi/ipmi_si.h      |   8 +
 drivers/char/ipmi/ipmi_si_intf.c |   3 +
 drivers/char/ipmi/ipmi_si_ls2k.c | 250 +++++++++
 drivers/gpu/drm/tiny/Kconfig     |  18 +
 drivers/gpu/drm/tiny/Makefile    |   1 +
 drivers/gpu/drm/tiny/ls2kbmc.c   | 918 +++++++++++++++++++++++++++++++
 drivers/mfd/Kconfig              |  15 +
 drivers/mfd/Makefile             |   2 +
 drivers/mfd/ls2kbmc-mfd.c        | 145 +++++
 10 files changed, 1361 insertions(+)
 create mode 100644 drivers/char/ipmi/ipmi_si_ls2k.c
 create mode 100644 drivers/gpu/drm/tiny/ls2kbmc.c
 create mode 100644 drivers/mfd/ls2kbmc-mfd.c