pt = stash->pt[0];
__i915_gem_object_pin_pages(pt->base);
- i915_gem_object_make_unshrinkable(pt->base);
fill32_px(pt, vm->scratch[0]->encode);
{
struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(i915_vm_to_ppgtt(vm));
- __i915_vma_put(ppgtt->vma);
-
gen6_ppgtt_free_pd(ppgtt);
free_scratch(vm);
mutex_destroy(&ppgtt->flush);
- mutex_destroy(&ppgtt->pin_mutex);
free_pd(&ppgtt->base.vm, ppgtt->base.pd);
}
-static int pd_vma_set_pages(struct i915_vma *vma)
-{
- vma->pages = ERR_PTR(-ENODEV);
- return 0;
-}
-
-static void pd_vma_clear_pages(struct i915_vma *vma)
-{
- GEM_BUG_ON(!vma->pages);
-
- vma->pages = NULL;
-}
-
static void pd_vma_bind(struct i915_address_space *vm,
struct i915_vm_pt_stash *stash,
struct i915_vma *vma,
}
static const struct i915_vma_ops pd_vma_ops = {
- .set_pages = pd_vma_set_pages,
- .clear_pages = pd_vma_clear_pages,
.bind_vma = pd_vma_bind,
.unbind_vma = pd_vma_unbind,
};
-static struct i915_vma *pd_vma_create(struct gen6_ppgtt *ppgtt, int size)
-{
- struct i915_ggtt *ggtt = ppgtt->base.vm.gt->ggtt;
- struct i915_vma *vma;
-
- GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));
- GEM_BUG_ON(size > ggtt->vm.total);
-
- vma = i915_vma_alloc();
- if (!vma)
- return ERR_PTR(-ENOMEM);
-
- i915_active_init(&vma->active, NULL, NULL, 0);
-
- kref_init(&vma->ref);
- mutex_init(&vma->pages_mutex);
- vma->vm = i915_vm_get(&ggtt->vm);
- vma->ops = &pd_vma_ops;
- vma->private = ppgtt;
-
- vma->size = size;
- vma->fence_size = size;
- atomic_set(&vma->flags, I915_VMA_GGTT);
- vma->ggtt_view.type = I915_GGTT_VIEW_ROTATED; /* prevent fencing */
-
- INIT_LIST_HEAD(&vma->obj_link);
- INIT_LIST_HEAD(&vma->closed_link);
-
- return vma;
-}
-
int gen6_ppgtt_pin(struct i915_ppgtt *base, struct i915_gem_ww_ctx *ww)
{
struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
if (atomic_add_unless(&ppgtt->pin_count, 1, 0))
return 0;
- if (mutex_lock_interruptible(&ppgtt->pin_mutex))
- return -EINTR;
+ /* grab the ppgtt resv to pin the object */
+ err = i915_vm_lock_objects(&ppgtt->base.vm, ww);
+ if (err)
+ return err;
/*
* PPGTT PDEs reside in the GGTT and consists of 512 entries. The
* allocator works in address space sizes, so it's multiplied by page
* size. We allocate at the top of the GTT to avoid fragmentation.
*/
- err = 0;
- if (!atomic_read(&ppgtt->pin_count))
+ if (!atomic_read(&ppgtt->pin_count)) {
err = i915_ggtt_pin(ppgtt->vma, ww, GEN6_PD_ALIGN, PIN_HIGH);
+
+ GEM_BUG_ON(ppgtt->vma->fence);
+ clear_bit(I915_VMA_CAN_FENCE_BIT, __i915_vma_flags(ppgtt->vma));
+ }
if (!err)
atomic_inc(&ppgtt->pin_count);
- mutex_unlock(&ppgtt->pin_mutex);
return err;
}
-void gen6_ppgtt_unpin(struct i915_ppgtt *base)
+static int pd_dummy_obj_get_pages(struct drm_i915_gem_object *obj)
{
- struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
+ obj->mm.pages = ZERO_SIZE_PTR;
+ return 0;
+}
- GEM_BUG_ON(!atomic_read(&ppgtt->pin_count));
- if (atomic_dec_and_test(&ppgtt->pin_count))
- i915_vma_unpin(ppgtt->vma);
+static void pd_dummy_obj_put_pages(struct drm_i915_gem_object *obj,
+ struct sg_table *pages)
+{
}
-void gen6_ppgtt_unpin_all(struct i915_ppgtt *base)
+static const struct drm_i915_gem_object_ops pd_dummy_obj_ops = {
+ .name = "pd_dummy_obj",
+ .get_pages = pd_dummy_obj_get_pages,
+ .put_pages = pd_dummy_obj_put_pages,
+};
+
+static struct i915_page_directory *
+gen6_alloc_top_pd(struct gen6_ppgtt *ppgtt)
{
- struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
+ struct i915_ggtt * const ggtt = ppgtt->base.vm.gt->ggtt;
+ struct i915_page_directory *pd;
+ int err;
- if (!atomic_read(&ppgtt->pin_count))
- return;
+ pd = __alloc_pd(I915_PDES);
+ if (unlikely(!pd))
+ return ERR_PTR(-ENOMEM);
- i915_vma_unpin(ppgtt->vma);
- atomic_set(&ppgtt->pin_count, 0);
+ pd->pt.base = __i915_gem_object_create_internal(ppgtt->base.vm.gt->i915,
+ &pd_dummy_obj_ops,
+ I915_PDES * SZ_4K);
+ if (IS_ERR(pd->pt.base)) {
+ err = PTR_ERR(pd->pt.base);
+ pd->pt.base = NULL;
+ goto err_pd;
+ }
+
+ pd->pt.base->base.resv = i915_vm_resv_get(&ppgtt->base.vm);
+ pd->pt.base->shares_resv_from = &ppgtt->base.vm;
+
+ ppgtt->vma = i915_vma_instance(pd->pt.base, &ggtt->vm, NULL);
+ if (IS_ERR(ppgtt->vma)) {
+ err = PTR_ERR(ppgtt->vma);
+ ppgtt->vma = NULL;
+ goto err_pd;
+ }
+
+ /* The dummy object we create is special, override ops.. */
+ ppgtt->vma->ops = &pd_vma_ops;
+ ppgtt->vma->private = ppgtt;
+ return pd;
+
+err_pd:
+ free_pd(&ppgtt->base.vm, pd);
+ return ERR_PTR(err);
+}
+
+void gen6_ppgtt_unpin(struct i915_ppgtt *base)
+{
+ struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
+
+ GEM_BUG_ON(!atomic_read(&ppgtt->pin_count));
+ if (atomic_dec_and_test(&ppgtt->pin_count))
+ i915_vma_unpin(ppgtt->vma);
}
struct i915_ppgtt *gen6_ppgtt_create(struct intel_gt *gt)
return ERR_PTR(-ENOMEM);
mutex_init(&ppgtt->flush);
- mutex_init(&ppgtt->pin_mutex);
ppgtt_init(&ppgtt->base, gt, 0);
ppgtt->base.vm.pd_shift = ilog2(SZ_4K * SZ_4K / sizeof(gen6_pte_t));
ppgtt->base.vm.cleanup = gen6_ppgtt_cleanup;
ppgtt->base.vm.alloc_pt_dma = alloc_pt_dma;
+ ppgtt->base.vm.alloc_scratch_dma = alloc_pt_dma;
ppgtt->base.vm.pte_encode = ggtt->vm.pte_encode;
- ppgtt->base.pd = __alloc_pd(I915_PDES);
- if (!ppgtt->base.pd) {
- err = -ENOMEM;
- goto err_free;
- }
-
err = gen6_ppgtt_init_scratch(ppgtt);
if (err)
- goto err_pd;
+ goto err_free;
- ppgtt->vma = pd_vma_create(ppgtt, GEN6_PD_SIZE);
- if (IS_ERR(ppgtt->vma)) {
- err = PTR_ERR(ppgtt->vma);
+ ppgtt->base.pd = gen6_alloc_top_pd(ppgtt);
+ if (IS_ERR(ppgtt->base.pd)) {
+ err = PTR_ERR(ppgtt->base.pd);
goto err_scratch;
}
err_scratch:
free_scratch(&ppgtt->base.vm);
-err_pd:
- free_pd(&ppgtt->base.vm, ppgtt->base.pd);
err_free:
- mutex_destroy(&ppgtt->pin_mutex);
kfree(ppgtt);
return ERR_PTR(err);
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff