xe/oa: Fix query mode of operation for OAR/OAC

This is a set of squashed commits to facilitate smooth applying to
stable. Each commit message is retained for reference.

1) Allow a GGTT mapped batch to be submitted to user exec queue

For a OA use case, one of the HW registers needs to be modified by
submitting an MI_LOAD_REGISTER_IMM command to the users exec queue, so
that the register is modified in the user's hardware context. In order
to do this a batch that is mapped in GGTT, needs to be submitted to the
user exec queue. Since all user submissions use q->vm and hence PPGTT,
add some plumbing to enable submission of batches mapped in GGTT.

v2: ggtt is zero-initialized, so no need to set it false (Matt Brost)

2) xe/oa: Use MI_LOAD_REGISTER_IMMEDIATE to enable OAR/OAC

To enable OAR/OAC, a bit in RING_CONTEXT_CONTROL needs to be set.
Setting this bit cause the context image size to change and if not done
correct, can cause undesired hangs.

Current code uses a separate exec_queue to modify this bit and is
error-prone. As per HW recommendation, submit MI_LOAD_REGISTER_IMM to
the target hardware context to modify the relevant bit.

In v2 version, an attempt to submit everything to the user-queue was
made, but it failed the unprivileged-single-ctx-counters test. It
appears that the OACTXCONTROL must be modified from a remote context.

In v3 version, all context specific register configurations were moved
to use LOAD_REGISTER_IMMEDIATE and that seems to work well. This is a
cleaner way, since we can now submit all configuration to user
exec_queue and the fence handling is simplified.

v2:
(Matt)
- set job->ggtt to true if create job is successful
- unlock vm on job error

(Ashutosh)
- don't wait on job submission
- use kernel exec queue where possible

v3:
(Ashutosh)
- Fix checkpatch issues
- Remove extra spaces/new-lines
- Add Fixes: and Cc: tags
- Reset context control bit when OA stream is closed
- Submit all config via MI_LOAD_REGISTER_IMMEDIATE

(Umesh)
- Update commit message for v3 experiment
- Squash patches for easier port to stable

v4:
(Ashutosh)
- No need to pass q to xe_oa_submit_bb
- Do not support exec queues with width > 1
- Fix disabling of CTX_CTRL_OAC_CONTEXT_ENABLE

v5:
(Ashutosh)
- Drop reg_lri related comments
- Use XE_OA_SUBMIT_NO_DEPS in xe_oa_load_with_lri

Fixes: 8135f1c09dd2 ("drm/xe/oa: Don't reset OAC_CONTEXT_ENABLE on OA stream close")
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com> # commit 1
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241220171919.571528-2-umesh.nerlige.ramappa@intel.com
(cherry picked from commit 55039832f98c7e05f1cf9e0d8c12b2490abd0f16)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

0 files changed, 0 insertions, 0 deletions