[Intel-gfx] [PATCH 26/28] drm/i915: Remove assert_object_held_shared

Maarten Lankhorst
2021-10-21T10:37:45Z

This duck tape workaround is no longer required, unbind and destroy are
fixed to take the obj->resv mutex before destroying and obj->mm.lock has
been removed, always requiring obj->resv as well.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_object.c | 4 ++--
drivers/gpu/drm/i915/gem/i915_gem_object.h | 14 --------------
drivers/gpu/drm/i915/gem/i915_gem_pages.c | 12 ++++++------
drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 2 +-
drivers/gpu/drm/i915/i915_vma.c | 6 +++---
5 files changed, 12 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index d549f34829d0..a4fb76b7841d 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -548,7 +548,7 @@ bool i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj)
#ifdef CONFIG_LOCKDEP
if (IS_DGFX(to_i915(obj->base.dev)) &&
i915_gem_object_evictable((void __force *)obj))
- assert_object_held_shared(obj);
+ assert_object_held(obj);
#endif
return obj->mem_flags & I915_BO_FLAG_STRUCT_PAGE;
}
@@ -567,7 +567,7 @@ bool i915_gem_object_has_iomem(const struct drm_i915_gem_object *obj)
#ifdef CONFIG_LOCKDEP
if (IS_DGFX(to_i915(obj->base.dev)) &&
i915_gem_object_evictable((void __force *)obj))
- assert_object_held_shared(obj);
+ assert_object_held(obj);
#endif
return obj->mem_flags & I915_BO_FLAG_IOMEM;
}
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
index accd8fad0ed7..ef4f2568d46a 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
@@ -158,20 +158,6 @@ i915_gem_object_put(struct drm_i915_gem_object *obj)

#define assert_object_held(obj) dma_resv_assert_held((obj)->base.resv)

-/*
- * If more than one potential simultaneous locker, assert held.
- */
-static inline void assert_object_held_shared(const struct drm_i915_gem_object *obj)
-{
- /*
- * Note mm list lookup is protected by
- * kref_get_unless_zero().
- */
- if (IS_ENABLED(CONFIG_LOCKDEP) &&
- kref_read(&obj->base.refcount) > 0)
- assert_object_held(obj);
-}
-
static inline int __i915_gem_object_lock(struct drm_i915_gem_object *obj,
struct i915_gem_ww_ctx *ww,
bool intr)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
index 8eb1c3a6fc9c..dbd226b0ea49 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
@@ -19,7 +19,7 @@ void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
bool shrinkable;
int i;

- assert_object_held_shared(obj);
+ assert_object_held(obj);

if (i915_gem_object_is_volatile(obj))
obj->mm.madv = I915_MADV_DONTNEED;
@@ -94,7 +94,7 @@ int ____i915_gem_object_get_pages(struct drm_i915_gem_object *obj)
struct drm_i915_private *i915 = to_i915(obj->base.dev);
int err;

- assert_object_held_shared(obj);
+ assert_object_held(obj);

if (unlikely(obj->mm.madv != I915_MADV_WILLNEED)) {
drm_dbg(&i915->drm,
@@ -121,7 +121,7 @@ int __i915_gem_object_get_pages(struct drm_i915_gem_object *obj)

assert_object_held(obj);

- assert_object_held_shared(obj);
+ assert_object_held(obj);

if (unlikely(!i915_gem_object_has_pages(obj))) {
GEM_BUG_ON(i915_gem_object_has_pinned_pages(obj));
@@ -168,7 +168,7 @@ void i915_gem_object_truncate(struct drm_i915_gem_object *obj)
/* Try to discard unwanted pages */
void i915_gem_object_writeback(struct drm_i915_gem_object *obj)
{
- assert_object_held_shared(obj);
+ assert_object_held(obj);
GEM_BUG_ON(i915_gem_object_has_pages(obj));

if (obj->ops->writeback)
@@ -199,7 +199,7 @@ __i915_gem_object_unset_pages(struct drm_i915_gem_object *obj)
{
struct sg_table *pages;

- assert_object_held_shared(obj);
+ assert_object_held(obj);

pages = fetch_and_zero(&obj->mm.pages);
if (IS_ERR_OR_NULL(pages))
@@ -229,7 +229,7 @@ int __i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
return -EBUSY;

/* May be called by shrinker from within get_pages() (on another bo) */
- assert_object_held_shared(obj);
+ assert_object_held(obj);

i915_gem_object_release_mmap_offset(obj);

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
index 3173c9f9a040..a315c010f635 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
@@ -109,7 +109,7 @@ static void i915_gem_object_userptr_drop_ref(struct drm_i915_gem_object *obj)
{
struct page **pvec = NULL;

- assert_object_held_shared(obj);
+ assert_object_held(obj);

if (!--obj->userptr.page_ref) {
pvec = obj->userptr.pvec;
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 982bb8b739d3..8131dbf89048 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -1633,7 +1633,7 @@ int _i915_vma_move_to_active(struct i915_vma *vma,
void __i915_vma_evict(struct i915_vma *vma)
{
GEM_BUG_ON(i915_vma_is_pinned(vma));
- assert_object_held_shared(vma->obj);
+ assert_object_held(vma->obj);

if (i915_vma_is_map_and_fenceable(vma)) {
/* Force a pagefault for domain tracking on next user access */
@@ -1679,7 +1679,7 @@ int __i915_vma_unbind(struct i915_vma *vma)
int ret;

lockdep_assert_held(&vma->vm->mutex);
- assert_object_held_shared(vma->obj);
+ assert_object_held(vma->obj);

if (!drm_mm_node_allocated(&vma->node))
return 0;
@@ -1711,7 +1711,7 @@ int i915_vma_unbind(struct i915_vma *vma)
intel_wakeref_t wakeref = 0;
int err;

- assert_object_held_shared(vma->obj);
+ assert_object_held(vma->obj);

/* Optimistic wait before taking the mutex */
err = i915_vma_sync(vma);
--
2.33.0