[Intel-gfx] [PATCH v3 7/7] drm/i915/guc: handle interrupts from media GuC
Daniele Ceraolo Spurio
daniele.ceraolospurio at intel.com
Sat Oct 22 00:10:08 UTC 2022
The render and media GuCs share the same interrupt enable register, so
we can no longer disable interrupts when we disable communication for
one of the GuCs as this would impact the other GuC. Instead, we keep the
interrupts always enabled in HW and use a variable in the GuC structure
to determine if we want to service the received interrupts or not.
v2: use MTL_ prefix for reg definition (Matt)
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: John Harrison <John.C.Harrison at Intel.com>
Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
---
drivers/gpu/drm/i915/gt/intel_gt_irq.c | 21 ++++++++++++++----
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 2 ++
drivers/gpu/drm/i915/gt/uc/intel_guc.c | 29 ++++++++++++++-----------
drivers/gpu/drm/i915/gt/uc/intel_guc.h | 5 ++++-
drivers/gpu/drm/i915/gt/uc/intel_uc.c | 8 +++++--
5 files changed, 45 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_irq.c b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
index f26882fdc24c..f6805088c0eb 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_irq.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
@@ -17,6 +17,9 @@
static void guc_irq_handler(struct intel_guc *guc, u16 iir)
{
+ if (unlikely(!guc->interrupts.enabled))
+ return;
+
if (iir & GUC_INTR_GUC2HOST)
intel_guc_to_host_event_handler(guc);
}
@@ -249,6 +252,7 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
{
struct intel_uncore *uncore = gt->uncore;
u32 irqs = GT_RENDER_USER_INTERRUPT;
+ u32 guc_mask = intel_uc_wants_guc(>->uc) ? GUC_INTR_GUC2HOST : 0;
const u32 gsc_mask = GSC_IRQ_INTF(0) | GSC_IRQ_INTF(1);
u32 dmask;
u32 smask;
@@ -299,6 +303,19 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
if (HAS_HECI_GSC(gt->i915))
intel_uncore_write(uncore, GEN11_GUNIT_CSME_INTR_MASK, ~gsc_mask);
+ if (guc_mask) {
+ /* the enable bit is common for both GTs but the masks are separate */
+ u32 mask = gt->type == GT_MEDIA ?
+ REG_FIELD_PREP(ENGINE0_MASK, guc_mask) :
+ REG_FIELD_PREP(ENGINE1_MASK, guc_mask);
+
+ intel_uncore_write(uncore, GEN11_GUC_SG_INTR_ENABLE,
+ REG_FIELD_PREP(ENGINE1_MASK, guc_mask));
+
+ /* we might not be the first GT to write this reg */
+ intel_uncore_rmw(uncore, MTL_GUC_MGUC_INTR_MASK, mask, 0);
+ }
+
/*
* RPS interrupts will get enabled/disabled on demand when RPS itself
* is enabled/disabled.
@@ -307,10 +324,6 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
gt->pm_imr = ~gt->pm_ier;
intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_MASK, ~0);
-
- /* Same thing for GuC interrupts */
- intel_uncore_write(uncore, GEN11_GUC_SG_INTR_ENABLE, 0);
- intel_uncore_write(uncore, GEN11_GUC_SG_INTR_MASK, ~0);
}
void gen5_gt_irq_handler(struct intel_gt *gt, u32 gt_iir)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 36d95b79022c..868eaf3f37da 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -1548,6 +1548,7 @@
#define GEN11_CSME (31)
#define GEN11_GUNIT (28)
#define GEN11_GUC (25)
+#define MTL_MGUC (24)
#define GEN11_WDPERF (20)
#define GEN11_KCR (19)
#define GEN11_GTPM (16)
@@ -1602,6 +1603,7 @@
#define GEN11_VECS0_VECS1_INTR_MASK _MMIO(0x1900d0)
#define GEN12_VECS2_VECS3_INTR_MASK _MMIO(0x1900d4)
#define GEN11_GUC_SG_INTR_MASK _MMIO(0x1900e8)
+#define MTL_GUC_MGUC_INTR_MASK _MMIO(0x1900e8) /* MTL+ */
#define GEN11_GPM_WGBOXPERF_INTR_MASK _MMIO(0x1900ec)
#define GEN11_CRYPTO_RSVD_INTR_MASK _MMIO(0x1900f0)
#define GEN11_GUNIT_CSME_INTR_MASK _MMIO(0x1900f4)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
index b3600be61a9a..09f2a673aa19 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
@@ -98,6 +98,8 @@ static void gen9_enable_guc_interrupts(struct intel_guc *guc)
gt->pm_guc_events);
gen6_gt_pm_enable_irq(gt, gt->pm_guc_events);
spin_unlock_irq(gt->irq_lock);
+
+ guc->interrupts.enabled = true;
}
static void gen9_disable_guc_interrupts(struct intel_guc *guc)
@@ -105,6 +107,7 @@ static void gen9_disable_guc_interrupts(struct intel_guc *guc)
struct intel_gt *gt = guc_to_gt(guc);
assert_rpm_wakelock_held(>->i915->runtime_pm);
+ guc->interrupts.enabled = false;
spin_lock_irq(gt->irq_lock);
@@ -116,39 +119,39 @@ static void gen9_disable_guc_interrupts(struct intel_guc *guc)
gen9_reset_guc_interrupts(guc);
}
+static bool __gen11_reset_guc_interrupts(struct intel_gt *gt)
+{
+ u32 irq = gt->type == GT_MEDIA ? MTL_MGUC : GEN11_GUC;
+
+ lockdep_assert_held(gt->irq_lock);
+ return gen11_gt_reset_one_iir(gt, 0, irq);
+}
+
static void gen11_reset_guc_interrupts(struct intel_guc *guc)
{
struct intel_gt *gt = guc_to_gt(guc);
spin_lock_irq(gt->irq_lock);
- gen11_gt_reset_one_iir(gt, 0, GEN11_GUC);
+ __gen11_reset_guc_interrupts(gt);
spin_unlock_irq(gt->irq_lock);
}
static void gen11_enable_guc_interrupts(struct intel_guc *guc)
{
struct intel_gt *gt = guc_to_gt(guc);
- u32 events = REG_FIELD_PREP(ENGINE1_MASK, GUC_INTR_GUC2HOST);
spin_lock_irq(gt->irq_lock);
- WARN_ON_ONCE(gen11_gt_reset_one_iir(gt, 0, GEN11_GUC));
- intel_uncore_write(gt->uncore,
- GEN11_GUC_SG_INTR_ENABLE, events);
- intel_uncore_write(gt->uncore,
- GEN11_GUC_SG_INTR_MASK, ~events);
+ __gen11_reset_guc_interrupts(gt);
spin_unlock_irq(gt->irq_lock);
+
+ guc->interrupts.enabled = true;
}
static void gen11_disable_guc_interrupts(struct intel_guc *guc)
{
struct intel_gt *gt = guc_to_gt(guc);
- spin_lock_irq(gt->irq_lock);
-
- intel_uncore_write(gt->uncore, GEN11_GUC_SG_INTR_MASK, ~0);
- intel_uncore_write(gt->uncore, GEN11_GUC_SG_INTR_ENABLE, 0);
-
- spin_unlock_irq(gt->irq_lock);
+ guc->interrupts.enabled = false;
intel_synchronize_irq(gt->i915);
gen11_reset_guc_interrupts(guc);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index 804133df1ac9..061d55de3a94 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -78,6 +78,7 @@ struct intel_guc {
/** @interrupts: pointers to GuC interrupt-managing functions. */
struct {
+ bool enabled;
void (*reset)(struct intel_guc *guc);
void (*enable)(struct intel_guc *guc);
void (*disable)(struct intel_guc *guc);
@@ -316,9 +317,11 @@ static inline int intel_guc_send_busy_loop(struct intel_guc *guc,
return err;
}
+/* Only call this from the interrupt handler code */
static inline void intel_guc_to_host_event_handler(struct intel_guc *guc)
{
- intel_guc_ct_event_handler(&guc->ct);
+ if (guc->interrupts.enabled)
+ intel_guc_ct_event_handler(&guc->ct);
}
/* GuC addresses above GUC_GGTT_TOP also don't map through the GTT */
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index 4cd8a787f9e5..1d28286e6f06 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -636,8 +636,10 @@ void intel_uc_runtime_suspend(struct intel_uc *uc)
{
struct intel_guc *guc = &uc->guc;
- if (!intel_guc_is_ready(guc))
+ if (!intel_guc_is_ready(guc)) {
+ guc->interrupts.enabled = false;
return;
+ }
/*
* Wait for any outstanding CTB before tearing down communication /w the
@@ -657,8 +659,10 @@ void intel_uc_suspend(struct intel_uc *uc)
intel_wakeref_t wakeref;
int err;
- if (!intel_guc_is_ready(guc))
+ if (!intel_guc_is_ready(guc)) {
+ guc->interrupts.enabled = false;
return;
+ }
with_intel_runtime_pm(&uc_to_gt(uc)->i915->runtime_pm, wakeref) {
err = intel_guc_suspend(guc);
--
2.37.3
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