[PATCH RFC 0/1] Imagination Technologies PowerVR DRM driver

[Sarah Walker <sarah.walker@imgtec.com>]

This patch adds the initial DRM driver for Imagination Technologies PowerVR
GPUs, starting with those based on our Rogue architecture. It's worth pointing
out that this is a new driver, written from the ground up, rather than a
refactored version of our existing downstream driver (pvrsrvkm).

This new DRM driver supports:
- GEM shmem allocations
- dma-buf / PRIME
- Per-context (device node open) userspace managed virtual address space
- Implicit sync / reservation objects
- DRM sync objects
- Power management suspend / resume
- Render job submission
- Compute job submission
- META firmware processor
- MIPS firmware processor
- Basic GPU hang recovery

Still to do:
- Transfer job submission (needed for Vulkan)
- No-op job submission (needed for Vulkan)
- Support RISC-V firmware processor
- GPU hang detection
- Handling for running out of parameter buffer space
- DVFS

Currently our main focus is on our GX6250, AXE-1-16M and BXS-4-64 GPUs. Testing
so far has been done using an Acer Chromebook R13 (GX6250 GPU) and a TI SK-AM62
board (AXE-1-16M GPU). Firmware for the GX6250 and AXE-1-16M can be found here:
https://gitlab.freedesktop.org/frankbinns/linux-firmware/-/tree/powervr

A Vulkan driver that works with our downstream kernel driver has already been
merged into Mesa [1][2]. Support for this new DRM driver is being maintained in
a draft merge request [3], with the branch located here:
https://gitlab.freedesktop.org/frankbinns/mesa/-/tree/powervr-winsys

The Vulkan driver is progressing towards Vulkan 1.0. We've got several APIs left
to implement and a bunch that are queued up. We've mainly been running the
Sascha Willems 'triangle' example to verify that we've not regressed anything,
along with the 'pipelines' example and a simple compute example. We've not yet
done a full conformance run, so I don't have any numbers to share just yet.

The code in this patch, along with some of its history, can also be found here:
https://gitlab.freedesktop.org/frankbinns/powervr/-/tree/powervr-next

Sending this out now as it felt like a good point to get some feedback.

[1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15243
[2] https://gitlab.freedesktop.org/mesa/mesa/-/tree/main/src/imagination/vulkan
[3] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15507

Sarah Walker (1):
  drm/imagination: Add initial Imagination Technologies PowerVR driver

 drivers/gpu/drm/Kconfig                       |    2 +
 drivers/gpu/drm/Makefile                      |    1 +
 drivers/gpu/drm/imagination/Kconfig           |   11 +
 drivers/gpu/drm/imagination/Makefile          |   37 +
 drivers/gpu/drm/imagination/pvr_ccb.c         |  348 +
 drivers/gpu/drm/imagination/pvr_ccb.h         |   50 +
 drivers/gpu/drm/imagination/pvr_cccb.c        |  326 +
 drivers/gpu/drm/imagination/pvr_cccb.h        |  103 +
 drivers/gpu/drm/imagination/pvr_context.c     |  607 ++
 drivers/gpu/drm/imagination/pvr_context.h     |  176 +
 drivers/gpu/drm/imagination/pvr_debugfs.c     |   53 +
 drivers/gpu/drm/imagination/pvr_debugfs.h     |   29 +
 drivers/gpu/drm/imagination/pvr_device.c      |  759 ++
 drivers/gpu/drm/imagination/pvr_device.h      |  721 ++
 drivers/gpu/drm/imagination/pvr_device_info.c |  207 +
 drivers/gpu/drm/imagination/pvr_device_info.h |  125 +
 drivers/gpu/drm/imagination/pvr_drv.c         | 1118 +++
 drivers/gpu/drm/imagination/pvr_drv.h         |   19 +
 drivers/gpu/drm/imagination/pvr_fence.c       |  446 ++
 drivers/gpu/drm/imagination/pvr_fence.h       |  168 +
 drivers/gpu/drm/imagination/pvr_free_list.c   |  407 ++
 drivers/gpu/drm/imagination/pvr_free_list.h   |  142 +
 drivers/gpu/drm/imagination/pvr_fw.c          | 1028 +++
 drivers/gpu/drm/imagination/pvr_fw.h          |  329 +
 drivers/gpu/drm/imagination/pvr_fw_info.h     |  106 +
 drivers/gpu/drm/imagination/pvr_fw_meta.c     |  597 ++
 drivers/gpu/drm/imagination/pvr_fw_meta.h     |   14 +
 drivers/gpu/drm/imagination/pvr_fw_mips.c     |  276 +
 drivers/gpu/drm/imagination/pvr_fw_mips.h     |   38 +
 .../gpu/drm/imagination/pvr_fw_startstop.c    |  279 +
 .../gpu/drm/imagination/pvr_fw_startstop.h    |   13 +
 drivers/gpu/drm/imagination/pvr_fw_trace.c    |  505 ++
 drivers/gpu/drm/imagination/pvr_fw_trace.h    |   78 +
 drivers/gpu/drm/imagination/pvr_gem.c         | 1082 +++
 drivers/gpu/drm/imagination/pvr_gem.h         |  374 +
 drivers/gpu/drm/imagination/pvr_hwrt.c        |  548 ++
 drivers/gpu/drm/imagination/pvr_hwrt.h        |  165 +
 drivers/gpu/drm/imagination/pvr_job.c         | 1208 ++++
 drivers/gpu/drm/imagination/pvr_job.h         |   34 +
 drivers/gpu/drm/imagination/pvr_object.c      |  221 +
 drivers/gpu/drm/imagination/pvr_object.h      |   60 +
 drivers/gpu/drm/imagination/pvr_params.c      |  147 +
 drivers/gpu/drm/imagination/pvr_params.h      |   72 +
 drivers/gpu/drm/imagination/pvr_power.c       |  196 +
 drivers/gpu/drm/imagination/pvr_power.h       |   37 +
 .../gpu/drm/imagination/pvr_rogue_cr_defs.h   | 6193 +++++++++++++++++
 .../imagination/pvr_rogue_cr_defs_client.h    |  160 +
 drivers/gpu/drm/imagination/pvr_rogue_defs.h  |  179 +
 drivers/gpu/drm/imagination/pvr_rogue_fwif.h  | 2271 ++++++
 .../drm/imagination/pvr_rogue_fwif_check.h    |  491 ++
 .../drm/imagination/pvr_rogue_fwif_client.h   |  243 +
 .../imagination/pvr_rogue_fwif_client_check.h |  104 +
 .../drm/imagination/pvr_rogue_fwif_common.h   |   60 +
 .../pvr_rogue_fwif_resetframework.h           |   29 +
 .../gpu/drm/imagination/pvr_rogue_fwif_sf.h   |  890 +++
 .../drm/imagination/pvr_rogue_fwif_shared.h   |  258 +
 .../imagination/pvr_rogue_fwif_shared_check.h |  107 +
 .../drm/imagination/pvr_rogue_fwif_stream.h   |   69 +
 .../drm/imagination/pvr_rogue_heap_config.h   |  108 +
 drivers/gpu/drm/imagination/pvr_rogue_meta.h  |  356 +
 drivers/gpu/drm/imagination/pvr_rogue_mips.h  |  335 +
 .../drm/imagination/pvr_rogue_mips_check.h    |   56 +
 .../gpu/drm/imagination/pvr_rogue_mmu_defs.h  |  136 +
 drivers/gpu/drm/imagination/pvr_stream.c      |  303 +
 drivers/gpu/drm/imagination/pvr_stream.h      |   72 +
 drivers/gpu/drm/imagination/pvr_stream_defs.c |  231 +
 drivers/gpu/drm/imagination/pvr_stream_defs.h |   13 +
 drivers/gpu/drm/imagination/pvr_vendor.h      |   77 +
 drivers/gpu/drm/imagination/pvr_vm.c          | 4155 +++++++++++
 drivers/gpu/drm/imagination/pvr_vm.h          |  130 +
 drivers/gpu/drm/imagination/pvr_vm_mips.c     |  223 +
 drivers/gpu/drm/imagination/pvr_vm_mips.h     |   22 +
 .../gpu/drm/imagination/vendor/pvr_mt8173.c   |  121 +
 include/uapi/drm/pvr_drm.h                    | 1172 ++++
 74 files changed, 31826 insertions(+)
 create mode 100644 drivers/gpu/drm/imagination/Kconfig
 create mode 100644 drivers/gpu/drm/imagination/Makefile
 create mode 100644 drivers/gpu/drm/imagination/pvr_ccb.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_ccb.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_cccb.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_cccb.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_context.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_context.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_debugfs.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_debugfs.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_device.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_device.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_device_info.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_device_info.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_drv.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_drv.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_fence.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_fence.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_free_list.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_free_list.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw_info.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw_meta.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw_meta.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw_mips.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw_mips.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw_startstop.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw_startstop.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw_trace.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_fw_trace.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_gem.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_gem.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_hwrt.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_hwrt.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_job.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_job.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_object.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_object.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_params.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_params.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_power.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_power.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_cr_defs.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_cr_defs_client.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_defs.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif_check.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif_client.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif_client_check.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif_common.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif_resetframework.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif_sf.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif_shared.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif_shared_check.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_fwif_stream.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_heap_config.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_meta.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_mips.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_mips_check.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_rogue_mmu_defs.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_stream.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_stream.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_stream_defs.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_stream_defs.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_vendor.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_vm.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_vm.h
 create mode 100644 drivers/gpu/drm/imagination/pvr_vm_mips.c
 create mode 100644 drivers/gpu/drm/imagination/pvr_vm_mips.h
 create mode 100644 drivers/gpu/drm/imagination/vendor/pvr_mt8173.c
 create mode 100644 include/uapi/drm/pvr_drm.h

-- 
2.25.1