[0/2] Remove cxl and cxlflash drivers

Message

Andrew Donnellan Dec. 10, 2024, 7:27 a.m. UTC

This series removes the cxl and cxlflash drivers for IBM CAPI devices.

CAPI devices have been out of production for some time, and we're not
aware of any remaining users who are likely to want a modern kernel.
There's almost certainly some remaining driver bugs and we don't have much
hardware available to properly test the drivers any more. Removing these
drivers will also mean we can get rid of a non-trivial amount of support
code in arch/powerpc.

Thanks to everyone who's worked on these drivers over the last decade.

This series applies on top of [0].

[0] https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=436003&state=*

Andrew Donnellan (2):
  cxlflash: Remove driver
  cxl: Remove driver

 .../ABI/{obsolete => removed}/sysfs-class-cxl |   55 +-
 Documentation/arch/powerpc/cxl.rst            |  469 --
 Documentation/arch/powerpc/cxlflash.rst       |  433 --
 Documentation/arch/powerpc/index.rst          |    2 -
 .../userspace-api/ioctl/ioctl-number.rst      |    4 +-
 MAINTAINERS                                   |   21 -
 arch/powerpc/configs/skiroot_defconfig        |    1 -
 arch/powerpc/include/asm/copro.h              |    6 -
 arch/powerpc/include/asm/device.h             |    3 -
 arch/powerpc/include/asm/pnv-pci.h            |   17 -
 arch/powerpc/mm/book3s64/hash_native.c        |   13 +-
 arch/powerpc/mm/book3s64/hash_utils.c         |   10 +-
 arch/powerpc/mm/book3s64/pgtable.c            |    1 -
 arch/powerpc/mm/book3s64/slice.c              |    6 +-
 arch/powerpc/mm/copro_fault.c                 |   12 -
 arch/powerpc/platforms/powernv/Makefile       |    1 -
 arch/powerpc/platforms/powernv/pci-cxl.c      |  153 -
 arch/powerpc/platforms/powernv/pci-ioda.c     |   43 -
 arch/powerpc/platforms/powernv/pci.c          |   61 -
 arch/powerpc/platforms/powernv/pci.h          |    2 -
 drivers/misc/Kconfig                          |    1 -
 drivers/misc/Makefile                         |    1 -
 drivers/misc/cxl/Kconfig                      |   28 -
 drivers/misc/cxl/Makefile                     |   14 -
 drivers/misc/cxl/api.c                        |  532 ---
 drivers/misc/cxl/base.c                       |  126 -
 drivers/misc/cxl/context.c                    |  362 --
 drivers/misc/cxl/cxl.h                        | 1135 -----
 drivers/misc/cxl/cxllib.c                     |  271 --
 drivers/misc/cxl/debugfs.c                    |  134 -
 drivers/misc/cxl/fault.c                      |  341 --
 drivers/misc/cxl/file.c                       |  699 ---
 drivers/misc/cxl/flash.c                      |  538 ---
 drivers/misc/cxl/guest.c                      | 1208 -----
 drivers/misc/cxl/hcalls.c                     |  643 ---
 drivers/misc/cxl/hcalls.h                     |  200 -
 drivers/misc/cxl/irq.c                        |  450 --
 drivers/misc/cxl/main.c                       |  383 --
 drivers/misc/cxl/native.c                     | 1592 -------
 drivers/misc/cxl/of.c                         |  346 --
 drivers/misc/cxl/pci.c                        | 2103 ---------
 drivers/misc/cxl/sysfs.c                      |  771 ----
 drivers/misc/cxl/trace.c                      |    9 -
 drivers/misc/cxl/trace.h                      |  691 ---
 drivers/misc/cxl/vphb.c                       |  309 --
 drivers/scsi/Kconfig                          |    1 -
 drivers/scsi/Makefile                         |    1 -
 drivers/scsi/cxlflash/Kconfig                 |   15 -
 drivers/scsi/cxlflash/Makefile                |    5 -
 drivers/scsi/cxlflash/backend.h               |   48 -
 drivers/scsi/cxlflash/common.h                |  340 --
 drivers/scsi/cxlflash/cxl_hw.c                |  177 -
 drivers/scsi/cxlflash/lunmgt.c                |  278 --
 drivers/scsi/cxlflash/main.c                  | 3970 -----------------
 drivers/scsi/cxlflash/main.h                  |  129 -
 drivers/scsi/cxlflash/ocxl_hw.c               | 1399 ------
 drivers/scsi/cxlflash/ocxl_hw.h               |   72 -
 drivers/scsi/cxlflash/sislite.h               |  560 ---
 drivers/scsi/cxlflash/superpipe.c             | 2218 ---------
 drivers/scsi/cxlflash/superpipe.h             |  150 -
 drivers/scsi/cxlflash/vlun.c                  | 1336 ------
 drivers/scsi/cxlflash/vlun.h                  |   82 -
 include/misc/cxl-base.h                       |   48 -
 include/misc/cxl.h                            |  265 --
 include/misc/cxllib.h                         |  129 -
 include/uapi/misc/cxl.h                       |  156 -
 include/uapi/scsi/cxlflash_ioctl.h            |  276 --
 .../filesystems/statmount/statmount_test.c    |   13 +-
 68 files changed, 49 insertions(+), 25819 deletions(-)
 rename Documentation/ABI/{obsolete => removed}/sysfs-class-cxl (87%)
 delete mode 100644 Documentation/arch/powerpc/cxl.rst
 delete mode 100644 Documentation/arch/powerpc/cxlflash.rst
 delete mode 100644 arch/powerpc/platforms/powernv/pci-cxl.c
 delete mode 100644 drivers/misc/cxl/Kconfig
 delete mode 100644 drivers/misc/cxl/Makefile
 delete mode 100644 drivers/misc/cxl/api.c
 delete mode 100644 drivers/misc/cxl/base.c
 delete mode 100644 drivers/misc/cxl/context.c
 delete mode 100644 drivers/misc/cxl/cxl.h
 delete mode 100644 drivers/misc/cxl/cxllib.c
 delete mode 100644 drivers/misc/cxl/debugfs.c
 delete mode 100644 drivers/misc/cxl/fault.c
 delete mode 100644 drivers/misc/cxl/file.c
 delete mode 100644 drivers/misc/cxl/flash.c
 delete mode 100644 drivers/misc/cxl/guest.c
 delete mode 100644 drivers/misc/cxl/hcalls.c
 delete mode 100644 drivers/misc/cxl/hcalls.h
 delete mode 100644 drivers/misc/cxl/irq.c
 delete mode 100644 drivers/misc/cxl/main.c
 delete mode 100644 drivers/misc/cxl/native.c
 delete mode 100644 drivers/misc/cxl/of.c
 delete mode 100644 drivers/misc/cxl/pci.c
 delete mode 100644 drivers/misc/cxl/sysfs.c
 delete mode 100644 drivers/misc/cxl/trace.c
 delete mode 100644 drivers/misc/cxl/trace.h
 delete mode 100644 drivers/misc/cxl/vphb.c
 delete mode 100644 drivers/scsi/cxlflash/Kconfig
 delete mode 100644 drivers/scsi/cxlflash/Makefile
 delete mode 100644 drivers/scsi/cxlflash/backend.h
 delete mode 100644 drivers/scsi/cxlflash/common.h
 delete mode 100644 drivers/scsi/cxlflash/cxl_hw.c
 delete mode 100644 drivers/scsi/cxlflash/lunmgt.c
 delete mode 100644 drivers/scsi/cxlflash/main.c
 delete mode 100644 drivers/scsi/cxlflash/main.h
 delete mode 100644 drivers/scsi/cxlflash/ocxl_hw.c
 delete mode 100644 drivers/scsi/cxlflash/ocxl_hw.h
 delete mode 100644 drivers/scsi/cxlflash/sislite.h
 delete mode 100644 drivers/scsi/cxlflash/superpipe.c
 delete mode 100644 drivers/scsi/cxlflash/superpipe.h
 delete mode 100644 drivers/scsi/cxlflash/vlun.c
 delete mode 100644 drivers/scsi/cxlflash/vlun.h
 delete mode 100644 include/misc/cxl-base.h
 delete mode 100644 include/misc/cxl.h
 delete mode 100644 include/misc/cxllib.h
 delete mode 100644 include/uapi/misc/cxl.h
 delete mode 100644 include/uapi/scsi/cxlflash_ioctl.h