[PATCH 0/6 v4] *** Dedicated vmid per process v4 ***

[Chunming Zhou]

The current kernel implementation, which grabs the idle VMID from pool when emitting the job may:

    The back-to-back submission from one process could use different VMID.
    The submission to different queues from single process could use different VMID

It works well in most case but cannot work for the SQ thread trace capture.

The VMID for the submission that set the {SQTT}_BASE, which refers to the address of the trace buffer, is stored in shader engine.

If the profiling application have to use different VMIDs to submit IBs in its life cycle:

    Some trace is not captured since it actually uses different VMID to submit jobs.
    Some part of captured trace may come from different application since they are accidentally uses the owner’s VMID to submit jobs.

V2:
1. address Christian's comments:
	a. drop context flags for tag process, instead, add vm ioctl.
	b. change order of patches.
	c. sync waiting only when vm flush needs.

2. address Alex's comments;
	bump module version

V3:
  address Jerry and Christian's comments.
  and only reserve gfxhub vmid

v4:
  address Jerry and Christian's comments.
  fix some race condistions.

Chunming Zhou (6):
  drm/amdgpu: add vm ioctl
  drm/amdgpu: add reserved vmid field in vm struct v2
  drm/amdgpu: reserve/unreserve vmid by vm ioctl v4
  drm/amdgpu: add limitation for dedicated vm number v4
  drm/amdgpu: implement grab reserved vmid V3
  drm/amdgpu: bump module verion for reserved vmid

 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |   3 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |   1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c  | 152 ++++++++++++++++++++++++++++++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h  |   6 ++
 include/uapi/drm/amdgpu_drm.h           |  22 +++++
 5 files changed, 178 insertions(+), 6 deletions(-)

-- 
1.9.1