Some of our upcoming platforms, including the Xe_HP SDV, support a "multi-tile" design. A multi-tile platform is effectively a platform with multiple GT instances and local memory regions, all behind a single PCI device. From an i915 perspective, this translates to multiple intel_gt structures per drm_i915_private. This series provides the initial refactoring to support multiple independent GTs per card, but further work (especially related to local memory) will be required to fully enable a multi-tile platform.
Note that the presence of multiple GTs is largely transparent to userspace. A multi-tile platform will advertise a larger list of engines to userspace, but the concept of "tile" is not something userspace has to worry about directly. There will be some uapi implications later due to the devices having multiple local memory regions, but that aspect of multi-tile is not covered by this patch series and will show up in future work.
v2: - Include some additional tile setup refactoring that got missed in v1.
v3: - Fix GEM_BUG_ON() assertion on pre-gen9 platforms; the assertion was only meant for multi-tile platforms and will always fail on old platforms that have a BAR0 smaller than 16MB. - Rename some of the gt/tile initialization functions. (Lucas/Jani) - Move top-level tile memory init to i915_drv.c since it isn't directly related to the GT. (Lucas) - Squash per-gt cleanup into the patch that introduces the per-gt setup. - Fix handling of display and GSE interrupts (our current multi-tile platforms don't have display, but we can't count on that being true in the future).
Daniele Ceraolo Spurio (2): drm/i915: split general MMIO setup from per-GT uncore init drm/i915: Initial support for per-tile uncore
Matt Roper (1): drm/i915: Restructure probe to handle multi-tile platforms
Michal Wajdeczko (1): drm/i915/guc: Update CT debug macro for multi-tile
Michał Winiarski (1): drm/i915: Store backpointer to GT in uncore
Paulo Zanoni (3): drm/i915: rework some irq functions to take intel_gt as argument drm/i915/xehp: Determine which tile raised an interrupt drm/i915/xehp: Make IRQ reset and postinstall multi-tile aware
Tvrtko Ursulin (2): drm/i915: Prepare for multiple gts drm/i915/xehpsdv: Initialize multi-tiles
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 2 +- drivers/gpu/drm/i915/gt/intel_gt.c | 177 +++++++++++++++++- drivers/gpu/drm/i915/gt/intel_gt.h | 11 ++ drivers/gpu/drm/i915/gt/intel_gt_pm.c | 9 +- drivers/gpu/drm/i915/gt/intel_gt_types.h | 10 + drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 6 +- drivers/gpu/drm/i915/i915_debugfs.c | 5 +- drivers/gpu/drm/i915/i915_drv.c | 102 ++++++++-- drivers/gpu/drm/i915/i915_drv.h | 9 + drivers/gpu/drm/i915/i915_irq.c | 77 +++++--- drivers/gpu/drm/i915/i915_pci.c | 40 +++- drivers/gpu/drm/i915/i915_reg.h | 4 + drivers/gpu/drm/i915/intel_device_info.h | 15 ++ drivers/gpu/drm/i915/intel_memory_region.h | 3 + drivers/gpu/drm/i915/intel_uncore.c | 36 ++-- drivers/gpu/drm/i915/intel_uncore.h | 6 +- .../gpu/drm/i915/selftests/mock_gem_device.c | 3 +- drivers/gpu/drm/i915/selftests/mock_uncore.c | 2 +- 18 files changed, 423 insertions(+), 94 deletions(-)