[PATCH 4/5] drm/i915/gt: Reset all pinned contexts at __engine_unpark()
Thomas Hellström
thomas.hellstrom at linux.intel.com
Wed Sep 1 19:27:35 UTC 2021
Don't just reset the kernel context but include all other pinned contexts
as well. Currently this affects the migrate pinned contexts.
At the same time introduce an object flag I915_BO_ALLOC_PM_VOLATILE to
indicate that a lmem object doesn't need backup at suspend time, mark the
context images and rings with this flag, and make sure they aren't backed
up on suspend.
Signed-off-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_object_types.h | 16 +++++++++-------
drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c | 3 +++
drivers/gpu/drm/i915/gt/intel_context_types.h | 8 ++++++++
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 4 ++++
drivers/gpu/drm/i915/gt/intel_engine_pm.c | 9 +++++++++
drivers/gpu/drm/i915/gt/intel_engine_types.h | 7 +++++++
drivers/gpu/drm/i915/gt/intel_lrc.c | 3 ++-
drivers/gpu/drm/i915/gt/intel_ring.c | 3 ++-
drivers/gpu/drm/i915/gt/mock_engine.c | 1 +
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 10 +++++++---
10 files changed, 52 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
index 734cc8e16481..c415f28fe7a9 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
@@ -288,16 +288,18 @@ struct drm_i915_gem_object {
I915_SELFTEST_DECLARE(struct list_head st_link);
unsigned long flags;
-#define I915_BO_ALLOC_CONTIGUOUS BIT(0)
-#define I915_BO_ALLOC_VOLATILE BIT(1)
-#define I915_BO_ALLOC_CPU_CLEAR BIT(2)
-#define I915_BO_ALLOC_USER BIT(3)
+#define I915_BO_ALLOC_CONTIGUOUS BIT(0)
+#define I915_BO_ALLOC_VOLATILE BIT(1)
+#define I915_BO_ALLOC_CPU_CLEAR BIT(2)
+#define I915_BO_ALLOC_USER BIT(3)
+#define I915_BO_ALLOC_PM_VOLATILE BIT(4)
#define I915_BO_ALLOC_FLAGS (I915_BO_ALLOC_CONTIGUOUS | \
I915_BO_ALLOC_VOLATILE | \
I915_BO_ALLOC_CPU_CLEAR | \
- I915_BO_ALLOC_USER)
-#define I915_BO_READONLY BIT(4)
-#define I915_TILING_QUIRK_BIT 5 /* unknown swizzling; do not release! */
+ I915_BO_ALLOC_USER | \
+ I915_BO_ALLOC_PM_VOLATILE)
+#define I915_BO_READONLY BIT(5)
+#define I915_TILING_QUIRK_BIT 6 /* unknown swizzling; do not release! */
/**
* @mem_flags - Mutable placement-related flags
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c
index 0801124ed85a..066647435ec1 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c
@@ -39,6 +39,9 @@ static int i915_ttm_backup(struct i915_gem_apply_to_region *apply,
if (i915_gem_object_evictable(obj))
return ttm_bo_validate(bo, i915_ttm_sys_placement(), &ctx);
+ if (obj->flags & I915_BO_ALLOC_PM_VOLATILE)
+ return 0;
+
sys_region = i915->mm.regions[INTEL_REGION_SMEM];
backup = i915_gem_object_create_region(sys_region,
obj->base.size,
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index e54351a170e2..a63631ea0ec4 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -152,6 +152,14 @@ struct intel_context {
/** sseu: Control eu/slice partitioning */
struct intel_sseu sseu;
+ /**
+ * pinned_contexts_link: List link for the engine's pinned contexts.
+ * This is only used if this is a perma-pinned kernel context and
+ * the list is assumed to only be manipulated during driver load
+ * or unload time so no mutex protection currently.
+ */
+ struct list_head pinned_contexts_link;
+
u8 wa_bb_page; /* if set, page num reserved for context workarounds */
struct {
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 332efea696a5..c606a4714904 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -320,6 +320,7 @@ static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id)
BUILD_BUG_ON(BITS_PER_TYPE(engine->mask) < I915_NUM_ENGINES);
+ INIT_LIST_HEAD(&engine->pinned_contexts_list);
engine->id = id;
engine->legacy_idx = INVALID_ENGINE;
engine->mask = BIT(id);
@@ -875,6 +876,8 @@ intel_engine_create_pinned_context(struct intel_engine_cs *engine,
return ERR_PTR(err);
}
+ list_add_tail(&ce->pinned_contexts_link, &engine->pinned_contexts_list);
+
/*
* Give our perma-pinned kernel timelines a separate lockdep class,
* so that we can use them from within the normal user timelines
@@ -897,6 +900,7 @@ void intel_engine_destroy_pinned_context(struct intel_context *ce)
list_del(&ce->timeline->engine_link);
mutex_unlock(&hwsp->vm->mutex);
+ list_del(&ce->pinned_contexts_link);
intel_context_unpin(ce);
intel_context_put(ce);
}
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
index 1f07ac4e0672..3a5cbbf3e3fe 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
@@ -72,6 +72,15 @@ static int __engine_unpark(struct intel_wakeref *wf)
READ_ONCE(*ce->timeline->hwsp_seqno));
}
+ list_for_each_entry(ce, &engine->pinned_contexts_list,
+ pinned_contexts_link) {
+ if (ce == engine->kernel_context)
+ continue;
+
+ dbg_poison_ce(ce);
+ ce->ops->reset(ce);
+ }
+
if (engine->unpark)
engine->unpark(engine);
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index bfbfe53c23dd..5ae1207c363b 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -307,6 +307,13 @@ struct intel_engine_cs {
struct intel_context *kernel_context; /* pinned */
+ /**
+ * pinned_contexts_list: List of pinned contexts. This list is only
+ * assumed to be manipulated during driver load- or unload time and
+ * does therefore not have any additional protection.
+ */
+ struct list_head pinned_contexts_list;
+
intel_engine_mask_t saturated; /* submitting semaphores too late? */
struct {
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 6ba8daea2f56..3ef9eaf8c50e 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -942,7 +942,8 @@ __lrc_alloc_state(struct intel_context *ce, struct intel_engine_cs *engine)
context_size += PAGE_SIZE;
}
- obj = i915_gem_object_create_lmem(engine->i915, context_size, 0);
+ obj = i915_gem_object_create_lmem(engine->i915, context_size,
+ I915_BO_ALLOC_PM_VOLATILE);
if (IS_ERR(obj))
obj = i915_gem_object_create_shmem(engine->i915, context_size);
if (IS_ERR(obj))
diff --git a/drivers/gpu/drm/i915/gt/intel_ring.c b/drivers/gpu/drm/i915/gt/intel_ring.c
index 7c4d5158e03b..2fdd52b62092 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring.c
@@ -112,7 +112,8 @@ static struct i915_vma *create_ring_vma(struct i915_ggtt *ggtt, int size)
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
- obj = i915_gem_object_create_lmem(i915, size, I915_BO_ALLOC_VOLATILE);
+ obj = i915_gem_object_create_lmem(i915, size, I915_BO_ALLOC_VOLATILE |
+ I915_BO_ALLOC_PM_VOLATILE);
if (IS_ERR(obj) && i915_ggtt_has_aperture(ggtt))
obj = i915_gem_object_create_stolen(i915, size);
if (IS_ERR(obj))
diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
index 2c1af030310c..8a14982a9691 100644
--- a/drivers/gpu/drm/i915/gt/mock_engine.c
+++ b/drivers/gpu/drm/i915/gt/mock_engine.c
@@ -376,6 +376,7 @@ int mock_engine_init(struct intel_engine_cs *engine)
{
struct intel_context *ce;
+ INIT_LIST_HEAD(&engine->pinned_contexts_list);
engine->sched_engine = i915_sched_engine_create(ENGINE_MOCK);
if (!engine->sched_engine)
return -ENOMEM;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index 87d8dc8f51b9..55709206b95e 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -2385,9 +2385,13 @@ static inline void guc_init_lrc_mapping(struct intel_guc *guc)
* and even it did this code would be run again.
*/
- for_each_engine(engine, gt, id)
- if (engine->kernel_context)
- guc_kernel_context_pin(guc, engine->kernel_context);
+ for_each_engine(engine, gt, id) {
+ struct intel_context *ce;
+
+ list_for_each_entry(ce, &engine->pinned_contexts_list,
+ pinned_contexts_link)
+ guc_kernel_context_pin(guc, ce);
+ }
}
static void guc_release(struct intel_engine_cs *engine)
--
2.31.1
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