From: Akeem G Abodunrin <[email protected]> Starting with DG2, preemption can no longer be controlled using userspace on a per-context basis. Instead, the hardware only allows us to enable or disable preemption in a global, system-wide basis. Also, we lose the ability to specify the preemption granularity (such as batch-level vs command-level vs object-level).
v2 (MattR): - Move debugfs interface to a separate patch. (Jani) v3 (MattR): - Drop the debugfs support completely for now. Cc: Matt Roper <[email protected]> Cc: Prathap Kumar Valsan <[email protected]> Cc: John Harrison <[email protected]> Cc: Joonas Lahtinen <[email protected]> Cc: Jani Nikula <[email protected]> Cc: Tvrtko Ursulin <[email protected]> Signed-off-by: Akeem G Abodunrin <[email protected]> Signed-off-by: Matt Roper <[email protected]> Reviewed-by: Anusha Srivatsa <[email protected]> --- drivers/gpu/drm/i915/gt/intel_workarounds.c | 2 +- drivers/gpu/drm/i915/i915_drv.h | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index c328d46f8095..dc0ffff6f655 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -2316,7 +2316,7 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal) FF_DOP_CLOCK_GATE_DISABLE); } - if (IS_GRAPHICS_VER(i915, 9, 12)) { + if (HAS_PERCTX_PREEMPT_CTRL(i915)) { /* FtrPerCtxtPreemptionGranularityControl:skl,bxt,kbl,cfl,cnl,icl,tgl */ wa_masked_en(wal, GEN7_FF_SLICE_CS_CHICKEN1, diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index a9aceb08fcd1..97622d3ccfc2 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1376,6 +1376,9 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915, #define HAS_GUC_DEPRIVILEGE(dev_priv) \ (INTEL_INFO(dev_priv)->has_guc_deprivilege) +#define HAS_PERCTX_PREEMPT_CTRL(i915) \ + ((GRAPHICS_VER(i915) >= 9) && GRAPHICS_VER_FULL(i915) < IP_VER(12, 55)) + static inline bool run_as_guest(void) { return !hypervisor_is_type(X86_HYPER_NATIVE); -- 2.34.1
