From: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
While i915 does not use GuC doorbells, the firmware requires that some
initialisation is done.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 9 +++++++++
drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h | 2 +-
drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h | 5 +++++
3 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
index b2f05139de05..75fcce64fc57 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c
@@ -119,6 +119,7 @@ static void guc_mapping_table_init(struct intel_gt *gt,
static void __guc_ads_init(struct intel_guc *guc)
{
struct intel_gt *gt = guc_to_gt(guc);
+ struct drm_i915_private *i915 = gt->i915;
struct __guc_ads_blob *blob = guc->ads_blob;
const u32 skipped_size = LRC_PPHWSP_SZ * PAGE_SIZE + LR_HW_CONTEXT_SIZE;
u32 base;
@@ -158,6 +159,14 @@ static void __guc_ads_init(struct intel_guc *guc)
blob->system_info.vebox_enable_mask = VEBOX_MASK(gt);
blob->system_info.vdbox_sfc_support_mask = gt->info.vdbox_sfc_access;
+ if (INTEL_GEN(i915) >= 12 && !IS_DGFX(i915)) {
+ u32 distdbreg = intel_uncore_read(gt->uncore,
+ GEN12_DIST_DBS_POPULATED);
+ blob->system_info.num_of_doorbells_per_sqidi =
+ ((distdbreg >> GEN12_DOORBELLS_PER_SQIDI_SHIFT) &
+ GEN12_DOORBELLS_PER_SQIDI) + 1;
+ }
+
guc_mapping_table_init(guc_to_gt(guc), &blob->system_info);
base = intel_guc_ggtt_offset(guc, guc->ads_vma);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
index 0cd4a7f7f4cb..3492fb0d5dec 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
@@ -383,7 +383,7 @@ struct guc_gt_system_info {
u32 vdbox_enable_mask;
u32 vdbox_sfc_support_mask;
u32 vebox_enable_mask;
- u32 reserved1;
+ u32 num_of_doorbells_per_sqidi;
u8 mapping_table[GUC_MAX_ENGINE_CLASSES][GUC_MAX_INSTANCES_PER_CLASS];
u32 reserved2[8];
} __packed;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h
index 1949346e714e..b37fc2ffaef2 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h
@@ -118,6 +118,11 @@ struct guc_doorbell_info {
#define GEN8_DRB_VALID (1<<0)
#define GEN8_DRBREGU(x) _MMIO(0x1000 + (x) * 8 + 4)
+#define GEN12_DIST_DBS_POPULATED _MMIO(0xd08)
+#define GEN12_DOORBELLS_PER_SQIDI_SHIFT 16
+#define GEN12_DOORBELLS_PER_SQIDI (0xff)
+#define GEN12_SQIDIS_DOORBELL_EXIST (0xffff)
+
#define DE_GUCRMR _MMIO(0x44054)
#define GUC_BCS_RCS_IER _MMIO(0xC550)
--
2.25.1
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