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drm/i915: Remove the vma from the drm_mm if binding fails 

As we track whether a vma has been inserted into the drm_mm using the
vma->flags, if we fail to bind the vma into the GTT we do not update
those bits and will attempt to reinsert the vma into the drm_mm on
future passes. To prevent that, we want to unwind i915_vma_insert() if
we fail in our attempt to bind.

Fixes: 59bfa1248e ("drm/i915: Start passing around i915_vma from execbuffer")
Testcase: igt/drv_selftest/live_gtt
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: <stable@vger.kernel.org> # v4.9+
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170227122654.27651-3-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2017-02-27 12:26:54 +00:00
parent 2f7399af94
commit 31c7effa39
1 changed files with 37 additions and 20 deletions
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57
drivers/gpu/drm/i915/i915_vma.c
View File

@ -509,10 +509,36 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
return ret;
}
static void
i915_vma_remove(struct i915_vma *vma)
{
struct drm_i915_gem_object *obj = vma->obj;
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
drm_mm_remove_node(&vma->node);
list_move_tail(&vma->vm_link, &vma->vm->unbound_list);
/* Since the unbound list is global, only move to that list if
* no more VMAs exist.
*/
if (--obj->bind_count == 0)
list_move_tail(&obj->global_link,
&to_i915(obj->base.dev)->mm.unbound_list);
/* And finally now the object is completely decoupled from this vma,
* we can drop its hold on the backing storage and allow it to be
* reaped by the shrinker.
*/
i915_gem_object_unpin_pages(obj);
GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count);
}
int __i915_vma_do_pin(struct i915_vma *vma,
u64 size, u64 alignment, u64 flags)
{
unsigned int bound = vma->flags;
const unsigned int bound = vma->flags;
int ret;
lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
@ -521,18 +547,18 @@ int __i915_vma_do_pin(struct i915_vma *vma,
if (WARN_ON(bound & I915_VMA_PIN_OVERFLOW)) {
ret = -EBUSY;
goto err;
goto err_unpin;
}
if ((bound & I915_VMA_BIND_MASK) == 0) {
ret = i915_vma_insert(vma, size, alignment, flags);
if (ret)
goto err;
goto err_unpin;
}
ret = i915_vma_bind(vma, vma->obj->cache_level, flags);
if (ret)
goto err;
goto err_remove;
if ((bound ^ vma->flags) & I915_VMA_GLOBAL_BIND)
__i915_vma_set_map_and_fenceable(vma);
@ -541,7 +567,12 @@ int __i915_vma_do_pin(struct i915_vma *vma,
GEM_BUG_ON(i915_vma_misplaced(vma, size, alignment, flags));
return 0;
err:
err_remove:
if ((bound & I915_VMA_BIND_MASK) == 0) {
GEM_BUG_ON(vma->pages);
i915_vma_remove(vma);
}
err_unpin:
__i915_vma_unpin(vma);
return ret;
}
@ -654,9 +685,6 @@ int i915_vma_unbind(struct i915_vma *vma)
}
vma->flags &= ~(I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND);
drm_mm_remove_node(&vma->node);
list_move_tail(&vma->vm_link, &vma->vm->unbound_list);
if (vma->pages != obj->mm.pages) {
GEM_BUG_ON(!vma->pages);
sg_free_table(vma->pages);
@ -664,18 +692,7 @@ int i915_vma_unbind(struct i915_vma *vma)
}
vma->pages = NULL;
/* Since the unbound list is global, only move to that list if
* no more VMAs exist. */
if (--obj->bind_count == 0)
list_move_tail(&obj->global_link,
&to_i915(obj->base.dev)->mm.unbound_list);
/* And finally now the object is completely decoupled from this vma,
* we can drop its hold on the backing storage and allow it to be
* reaped by the shrinker.
*/
i915_gem_object_unpin_pages(obj);
GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count);
i915_vma_remove(vma);
destroy:
if (unlikely(i915_vma_is_closed(vma)))