diff options
Diffstat (limited to 'libre/linux-libre/0010-drm-i915-Introduce-a-vma.kref.patch')
| -rw-r--r-- | libre/linux-libre/0010-drm-i915-Introduce-a-vma.kref.patch | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/libre/linux-libre/0010-drm-i915-Introduce-a-vma.kref.patch b/libre/linux-libre/0010-drm-i915-Introduce-a-vma.kref.patch deleted file mode 100644 index 0dfeff145..000000000 --- a/libre/linux-libre/0010-drm-i915-Introduce-a-vma.kref.patch +++ /dev/null @@ -1,252 +0,0 @@ -From f9263854415cb857cef239b6d6ae5f05066e4731 Mon Sep 17 00:00:00 2001 -From: Chris Wilson <chris@chris-wilson.co.uk> -Date: Sun, 22 Dec 2019 21:02:55 +0000 -Subject: [PATCH 10/11] drm/i915: Introduce a vma.kref - -Start introducing a kref on i915_vma in order to protect the vma unbind -(i915_gem_object_unbind) from a parallel destruction (i915_vma_parked). -Later, we will use the refcount to manage all access and turn i915_vma -into a first class container. - -Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> -Cc: Imre Deak <imre.deak@intel.com> -Acked-by: Imre Deak <imre.deak@intel.com> -Link: https://patchwork.freedesktop.org/patch/msgid/20191222210256.2066451-2-chris@chris-wilson.co.uk ---- - drivers/gpu/drm/i915/gem/i915_gem_object.c | 2 +- - .../gpu/drm/i915/gem/selftests/huge_pages.c | 3 +-- - .../drm/i915/gem/selftests/i915_gem_mman.c | 4 +-- - drivers/gpu/drm/i915/i915_gem.c | 27 +++++++------------ - drivers/gpu/drm/i915/i915_gem_gtt.c | 5 ++-- - drivers/gpu/drm/i915/i915_vma.c | 9 ++++--- - drivers/gpu/drm/i915/i915_vma.h | 25 ++++++++++++++--- - 7 files changed, 44 insertions(+), 31 deletions(-) - -diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c -index a596548c07bf..b6937469ffd3 100644 ---- a/drivers/gpu/drm/i915/gem/i915_gem_object.c -+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c -@@ -174,7 +174,7 @@ static void __i915_gem_free_objects(struct drm_i915_private *i915, - GEM_BUG_ON(vma->obj != obj); - spin_unlock(&obj->vma.lock); - -- i915_vma_destroy(vma); -+ __i915_vma_put(vma); - - spin_lock(&obj->vma.lock); - } -diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c -index 688c49a24f32..bd1e2c12de63 100644 ---- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c -+++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c -@@ -1110,8 +1110,7 @@ static int __igt_write_huge(struct intel_context *ce, - out_vma_unpin: - i915_vma_unpin(vma); - out_vma_close: -- i915_vma_destroy(vma); -- -+ __i915_vma_put(vma); - return err; - } - -diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c -index e81c2726f7fd..3d8f00d40d42 100644 ---- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c -+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c -@@ -161,7 +161,7 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj, - kunmap(p); - - out: -- i915_vma_destroy(vma); -+ __i915_vma_put(vma); - return err; - } - -@@ -255,7 +255,7 @@ static int check_partial_mappings(struct drm_i915_gem_object *obj, - if (err) - return err; - -- i915_vma_destroy(vma); -+ __i915_vma_put(vma); - - if (igt_timeout(end_time, - "%s: timed out after tiling=%d stride=%d\n", -diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c -index 83eed642cbcd..0475a0343487 100644 ---- a/drivers/gpu/drm/i915/i915_gem.c -+++ b/drivers/gpu/drm/i915/i915_gem.c -@@ -143,7 +143,6 @@ int i915_gem_object_unbind(struct drm_i915_gem_object *obj, - struct i915_vma, - obj_link))) { - struct i915_address_space *vm = vma->vm; -- bool awake = false; - - list_move_tail(&vma->obj_link, &still_in_list); - if (!i915_vma_is_bound(vma, I915_VMA_BIND_MASK)) -@@ -154,26 +153,18 @@ int i915_gem_object_unbind(struct drm_i915_gem_object *obj, - break; - - /* Prevent vma being freed by i915_vma_parked as we unbind */ -- if (intel_gt_pm_get_if_awake(vm->gt)) { -- awake = true; -- } else { -- if (i915_vma_is_closed(vma)) { -- spin_unlock(&obj->vma.lock); -- i915_vma_parked(vm->gt); -- goto err_vm; -- } -- } -- -+ vma = __i915_vma_get(vma); - spin_unlock(&obj->vma.lock); - -- ret = -EBUSY; -- if (flags & I915_GEM_OBJECT_UNBIND_ACTIVE || -- !i915_vma_is_active(vma)) -- ret = i915_vma_unbind(vma); -+ if (vma) { -+ ret = -EBUSY; -+ if (flags & I915_GEM_OBJECT_UNBIND_ACTIVE || -+ !i915_vma_is_active(vma)) -+ ret = i915_vma_unbind(vma); -+ -+ __i915_vma_put(vma); -+ } - -- if (awake) -- intel_gt_pm_put(vm->gt); --err_vm: - i915_vm_close(vm); - spin_lock(&obj->vma.lock); - } -diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c -index 44727806dfd7..dd2c20f7d4d2 100644 ---- a/drivers/gpu/drm/i915/i915_gem_gtt.c -+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c -@@ -522,7 +522,7 @@ void __i915_vm_close(struct i915_address_space *vm) - - atomic_and(~I915_VMA_PIN_MASK, &vma->flags); - WARN_ON(__i915_vma_unbind(vma)); -- i915_vma_destroy(vma); -+ __i915_vma_put(vma); - - i915_gem_object_put(obj); - } -@@ -1790,7 +1790,7 @@ static void gen6_ppgtt_cleanup(struct i915_address_space *vm) - { - struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm)); - -- i915_vma_destroy(ppgtt->vma); -+ __i915_vma_put(ppgtt->vma); - - gen6_ppgtt_free_pd(ppgtt); - free_scratch(vm); -@@ -1878,6 +1878,7 @@ static struct i915_vma *pd_vma_create(struct gen6_ppgtt *ppgtt, int size) - - i915_active_init(&vma->active, NULL, NULL); - -+ kref_init(&vma->ref); - mutex_init(&vma->pages_mutex); - vma->vm = i915_vm_get(&ggtt->vm); - vma->ops = &pd_vma_ops; -diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c -index 01c822256b39..00973017abba 100644 ---- a/drivers/gpu/drm/i915/i915_vma.c -+++ b/drivers/gpu/drm/i915/i915_vma.c -@@ -112,6 +112,7 @@ vma_create(struct drm_i915_gem_object *obj, - if (vma == NULL) - return ERR_PTR(-ENOMEM); - -+ kref_init(&vma->ref); - mutex_init(&vma->pages_mutex); - vma->vm = i915_vm_get(vm); - vma->ops = &vm->vma_ops; -@@ -978,8 +979,10 @@ void i915_vma_reopen(struct i915_vma *vma) - __i915_vma_remove_closed(vma); - } - --void i915_vma_destroy(struct i915_vma *vma) -+void i915_vma_release(struct kref *ref) - { -+ struct i915_vma *vma = container_of(ref, typeof(*vma), ref); -+ - if (drm_mm_node_allocated(&vma->node)) { - mutex_lock(&vma->vm->mutex); - atomic_and(~I915_VMA_PIN_MASK, &vma->flags); -@@ -1027,7 +1030,7 @@ void i915_vma_parked(struct intel_gt *gt) - spin_unlock_irq(>->closed_lock); - - if (obj) { -- i915_vma_destroy(vma); -+ __i915_vma_put(vma); - i915_gem_object_put(obj); - } - -@@ -1192,7 +1195,7 @@ int __i915_vma_unbind(struct i915_vma *vma) - i915_vma_detach(vma); - vma_unbind_pages(vma); - -- drm_mm_remove_node(&vma->node); /* pairs with i915_vma_destroy() */ -+ drm_mm_remove_node(&vma->node); /* pairs with i915_vma_release() */ - return 0; - } - -diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h -index 465932813bc5..ce1db908ad69 100644 ---- a/drivers/gpu/drm/i915/i915_vma.h -+++ b/drivers/gpu/drm/i915/i915_vma.h -@@ -51,14 +51,19 @@ enum i915_cache_level; - */ - struct i915_vma { - struct drm_mm_node node; -- struct drm_i915_gem_object *obj; -+ - struct i915_address_space *vm; - const struct i915_vma_ops *ops; -- struct i915_fence_reg *fence; -+ -+ struct drm_i915_gem_object *obj; - struct dma_resv *resv; /** Alias of obj->resv */ -+ - struct sg_table *pages; - void __iomem *iomap; - void *private; /* owned by creator */ -+ -+ struct i915_fence_reg *fence; -+ - u64 size; - u64 display_alignment; - struct i915_page_sizes page_sizes; -@@ -71,6 +76,7 @@ struct i915_vma { - * handles (but same file) for execbuf, i.e. the number of aliases - * that exist in the ctx->handle_vmas LUT for this vma. - */ -+ struct kref ref; - atomic_t open_count; - atomic_t flags; - /** -@@ -333,7 +339,20 @@ int __must_check i915_vma_unbind(struct i915_vma *vma); - void i915_vma_unlink_ctx(struct i915_vma *vma); - void i915_vma_close(struct i915_vma *vma); - void i915_vma_reopen(struct i915_vma *vma); --void i915_vma_destroy(struct i915_vma *vma); -+ -+static inline struct i915_vma *__i915_vma_get(struct i915_vma *vma) -+{ -+ if (kref_get_unless_zero(&vma->ref)) -+ return vma; -+ -+ return NULL; -+} -+ -+void i915_vma_release(struct kref *ref); -+static inline void __i915_vma_put(struct i915_vma *vma) -+{ -+ kref_put(&vma->ref, i915_vma_release); -+} - - #define assert_vma_held(vma) dma_resv_assert_held((vma)->resv) - --- -2.25.2 - |