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drm/i915: Fill different pages of the GTT 

Exercise filling different pages of the GTT

v2: Walk all holes until we timeout

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-30-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2017-02-13 17:15:41 +00:00
parent 62c981cfe7
commit 6e32ab3d47
1 changed files with 93 additions and 0 deletions
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93
drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
View File

@ -409,6 +409,87 @@ err:
return err;
}
static int walk_hole(struct drm_i915_private *i915,
struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
const u64 hole_size = hole_end - hole_start;
const unsigned long max_pages =
min_t(u64, ULONG_MAX - 1, hole_size >> PAGE_SHIFT);
unsigned long flags;
u64 size;
/* Try binding a single VMA in different positions within the hole */
flags = PIN_OFFSET_FIXED | PIN_USER;
if (i915_is_ggtt(vm))
flags |= PIN_GLOBAL;
for_each_prime_number_from(size, 1, max_pages) {
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
u64 addr;
int err = 0;
obj = fake_dma_object(i915, size << PAGE_SHIFT);
if (IS_ERR(obj))
break;
vma = i915_vma_instance(obj, vm, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto err;
}
for (addr = hole_start;
addr + obj->base.size < hole_end;
addr += obj->base.size) {
err = i915_vma_pin(vma, 0, 0, addr | flags);
if (err) {
pr_err("%s bind failed at %llx + %llx [hole %llx- %llx] with err=%d\n",
__func__, addr, vma->size,
hole_start, hole_end, err);
goto err;
}
i915_vma_unpin(vma);
if (!drm_mm_node_allocated(&vma->node) ||
i915_vma_misplaced(vma, 0, 0, addr | flags)) {
pr_err("%s incorrect at %llx + %llx\n",
__func__, addr, vma->size);
err = -EINVAL;
goto err;
}
err = i915_vma_unbind(vma);
if (err) {
pr_err("%s unbind failed at %llx + %llx with err=%d\n",
__func__, addr, vma->size, err);
goto err;
}
GEM_BUG_ON(drm_mm_node_allocated(&vma->node));
if (igt_timeout(end_time,
"%s timed out at %llx\n",
__func__, addr)) {
err = -EINTR;
goto err;
}
}
err:
if (!i915_vma_is_ggtt(vma))
i915_vma_close(vma);
i915_gem_object_put(obj);
if (err)
return err;
}
return 0;
}
static int exercise_ppgtt(struct drm_i915_private *dev_priv,
int (*func)(struct drm_i915_private *i915,
struct i915_address_space *vm,
@ -452,6 +533,11 @@ static int igt_ppgtt_fill(void *arg)
return exercise_ppgtt(arg, fill_hole);
}
static int igt_ppgtt_walk(void *arg)
{
return exercise_ppgtt(arg, walk_hole);
}
static int sort_holes(void *priv, struct list_head *A, struct list_head *B)
{
struct drm_mm_node *a = list_entry(A, typeof(*a), hole_stack);
@ -506,11 +592,18 @@ static int igt_ggtt_fill(void *arg)
return exercise_ggtt(arg, fill_hole);
}
static int igt_ggtt_walk(void *arg)
{
return exercise_ggtt(arg, walk_hole);
}
int i915_gem_gtt_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_ppgtt_alloc),
SUBTEST(igt_ppgtt_walk),
SUBTEST(igt_ppgtt_fill),
SUBTEST(igt_ggtt_walk),
SUBTEST(igt_ggtt_fill),
};