Starting with MTL, media functionality has moved into a new, second GT
at the hardware level. This new GT, referred to as "standalone media"
in the spec, has its own GuC, power management/forcewake, etc. The
general non-engine GT registers for standalone media start at 0x380000,
but otherwise use the same MMIO offsets as the primary GT.
Standalone media has a lot of similarity to the remote tiles
present on platforms like xehpsdv and pvc, and our i915 implementation
can share much of the general "multi GT" infrastructure between the two
types of platforms. However there are a few notable differences
we must deal with:
- The 0x380000 offset only applies to the non-engine GT registers
(which the specs refer to as "GSI" registers). The engine registers
remain at their usual locations (e.g., 0x1C0000 for VCS0).
- Unlike platforms with remote tiles, all interrupt handling for
standalone media still happens via the primary GT.
v2:
- Added new patches to ensure each GT, not just the primary, is
handled properly during various init/suspend/resume/teardown flows.
- Simplified GSI offset handling and split it into its own patch.
- Correct gt->irq_lock assignment for media GT.
- Fix jump target for intel_root_gt_init_early() errors.
Cc: Radhakrishna Sripada <radhakrishna.sripada@xxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Cc: Aravind Iddamsetty <aravind.iddamsetty@xxxxxxxxx>
Matt Roper (12):
drm/i915: Move locking and unclaimed check into
mmio_debug_{suspend,resume}
drm/i915: Only hook up uncore->debug for primary uncore
drm/i915: Use managed allocations for extra uncore objects
drm/i915: Prepare more multi-GT initialization
drm/i915: Rename and expose common GT early init routine
drm/i915: Use a DRM-managed action to release the PCI bridge device
drm/i915: Initialize MMIO access for each GT
drm/i915: Handle each GT on init/release and suspend/resume
drm/i915/uncore: Add GSI offset to uncore
drm/i915/xelpmp: Expose media as another GT
drm/i915/mtl: Use primary GT's irq lock for media GT
drm/i915/mtl: Hook up interrupts for standalone media
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 10 +-
drivers/gpu/drm/i915/gt/intel_gt.c | 96 ++++++++++++----
drivers/gpu/drm/i915/gt/intel_gt.h | 4 +-
drivers/gpu/drm/i915/gt/intel_gt_irq.c | 35 ++++--
drivers/gpu/drm/i915/gt/intel_gt_pm_irq.c | 8 +-
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 10 ++
drivers/gpu/drm/i915/gt/intel_gt_types.h | 5 +-
drivers/gpu/drm/i915/gt/intel_rps.c | 26 ++---
drivers/gpu/drm/i915/gt/intel_sa_media.c | 47 ++++++++
drivers/gpu/drm/i915/gt/intel_sa_media.h | 15 +++
drivers/gpu/drm/i915/gt/uc/intel_guc.c | 24 ++--
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 4 +-
drivers/gpu/drm/i915/gt/uc/intel_uc.c | 4 +-
drivers/gpu/drm/i915/i915_driver.c | 105 ++++++++++++------
drivers/gpu/drm/i915/i915_drv.h | 5 +
drivers/gpu/drm/i915/i915_irq.c | 4 +-
drivers/gpu/drm/i915/i915_pci.c | 15 +++
drivers/gpu/drm/i915/intel_device_info.h | 19 ++++
drivers/gpu/drm/i915/intel_uncore.c | 83 +++++++++-----
drivers/gpu/drm/i915/intel_uncore.h | 28 ++++-
drivers/gpu/drm/i915/pxp/intel_pxp.c | 4 +-
drivers/gpu/drm/i915/pxp/intel_pxp_irq.c | 14 +--
drivers/gpu/drm/i915/pxp/intel_pxp_session.c | 4 +-
.../gpu/drm/i915/selftests/mock_gem_device.c | 1 +
25 files changed, 424 insertions(+), 147 deletions(-)
create mode 100644 drivers/gpu/drm/i915/gt/intel_sa_media.c
create mode 100644 drivers/gpu/drm/i915/gt/intel_sa_media.h
--
2.37.2
