From: Maarten Lankhorst maarten.lankhorst@linux.intel.com
We need to take the obj lock to pin pages, so wait until the callers have done so, before making the object unshrinkable.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com Cc: Thomas Hellström thomas.hellstrom@linux.intel.com --- .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 2 + .../gpu/drm/i915/gem/i915_gem_object_blt.c | 6 +++ .../gpu/drm/i915/gt/intel_gt_buffer_pool.c | 47 +++++++++---------- .../gpu/drm/i915/gt/intel_gt_buffer_pool.h | 5 ++ .../drm/i915/gt/intel_gt_buffer_pool_types.h | 1 + 5 files changed, 35 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index f5ea49e244ca..91f0c3fd9a4b 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -1343,6 +1343,7 @@ static int __reloc_gpu_alloc(struct i915_execbuffer *eb, err = PTR_ERR(cmd); goto err_pool; } + intel_gt_buffer_pool_mark_used(pool);
batch = i915_vma_instance(pool->obj, vma->vm, NULL); if (IS_ERR(batch)) { @@ -2635,6 +2636,7 @@ static int eb_parse(struct i915_execbuffer *eb) err = PTR_ERR(shadow); goto err; } + intel_gt_buffer_pool_mark_used(pool); i915_gem_object_set_readonly(shadow->obj); shadow->private = pool;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c index aee7ad3cc3c6..e0b873c3f46a 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c @@ -54,6 +54,9 @@ struct i915_vma *intel_emit_vma_fill_blt(struct intel_context *ce, if (unlikely(err)) goto out_put;
+ /* we pinned the pool, mark it as such */ + intel_gt_buffer_pool_mark_used(pool); + cmd = i915_gem_object_pin_map(pool->obj, I915_MAP_WC); if (IS_ERR(cmd)) { err = PTR_ERR(cmd); @@ -276,6 +279,9 @@ struct i915_vma *intel_emit_vma_copy_blt(struct intel_context *ce, if (unlikely(err)) goto out_put;
+ /* we pinned the pool, mark it as such */ + intel_gt_buffer_pool_mark_used(pool); + cmd = i915_gem_object_pin_map(pool->obj, I915_MAP_WC); if (IS_ERR(cmd)) { err = PTR_ERR(cmd); diff --git a/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool.c b/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool.c index 104cb30e8c13..030759305196 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool.c +++ b/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool.c @@ -98,28 +98,6 @@ static void pool_free_work(struct work_struct *wrk) round_jiffies_up_relative(HZ)); }
-static int pool_active(struct i915_active *ref) -{ - struct intel_gt_buffer_pool_node *node = - container_of(ref, typeof(*node), active); - struct dma_resv *resv = node->obj->base.resv; - int err; - - if (dma_resv_trylock(resv)) { - dma_resv_add_excl_fence(resv, NULL); - dma_resv_unlock(resv); - } - - err = i915_gem_object_pin_pages(node->obj); - if (err) - return err; - - /* Hide this pinned object from the shrinker until retired */ - i915_gem_object_make_unshrinkable(node->obj); - - return 0; -} - __i915_active_call static void pool_retire(struct i915_active *ref) { @@ -129,10 +107,13 @@ static void pool_retire(struct i915_active *ref) struct list_head *list = bucket_for_size(pool, node->obj->base.size); unsigned long flags;
- i915_gem_object_unpin_pages(node->obj); + if (node->pinned) { + i915_gem_object_unpin_pages(node->obj);
- /* Return this object to the shrinker pool */ - i915_gem_object_make_purgeable(node->obj); + /* Return this object to the shrinker pool */ + i915_gem_object_make_purgeable(node->obj); + node->pinned = false; + }
GEM_BUG_ON(node->age); spin_lock_irqsave(&pool->lock, flags); @@ -144,6 +125,19 @@ static void pool_retire(struct i915_active *ref) round_jiffies_up_relative(HZ)); }
+void intel_gt_buffer_pool_mark_used(struct intel_gt_buffer_pool_node *node) +{ + assert_object_held(node->obj); + + if (node->pinned) + return; + + __i915_gem_object_pin_pages(node->obj); + /* Hide this pinned object from the shrinker until retired */ + i915_gem_object_make_unshrinkable(node->obj); + node->pinned = true; +} + static struct intel_gt_buffer_pool_node * node_create(struct intel_gt_buffer_pool *pool, size_t sz) { @@ -158,7 +152,8 @@ node_create(struct intel_gt_buffer_pool *pool, size_t sz)
node->age = 0; node->pool = pool; - i915_active_init(&node->active, pool_active, pool_retire); + node->pinned = false; + i915_active_init(&node->active, NULL, pool_retire);
obj = i915_gem_object_create_internal(gt->i915, sz); if (IS_ERR(obj)) { diff --git a/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool.h b/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool.h index 42cbac003e8a..9878ce9a07ab 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool.h @@ -17,10 +17,15 @@ struct i915_request; struct intel_gt_buffer_pool_node * intel_gt_get_buffer_pool(struct intel_gt *gt, size_t size);
+void intel_gt_buffer_pool_mark_used(struct intel_gt_buffer_pool_node *node); + static inline int intel_gt_buffer_pool_mark_active(struct intel_gt_buffer_pool_node *node, struct i915_request *rq) { + /* did we call mark_used? */ + GEM_WARN_ON(!node->pinned); + return i915_active_add_request(&node->active, rq); }
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool_types.h b/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool_types.h index bcf1658c9633..0401825e829d 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool_types.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_buffer_pool_types.h @@ -31,6 +31,7 @@ struct intel_gt_buffer_pool_node { struct rcu_head rcu; }; unsigned long age; + bool pinned; };
#endif /* INTEL_GT_BUFFER_POOL_TYPES_H */