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drm/i915: Add mock exercise for i915_gem_gtt_reserve 

i915_gem_gtt_reserve should put the node exactly as requested in the
GTT, evicting as required.

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/20170213171558.20942-42-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2017-02-13 17:15:53 +00:00
parent f40a7b7558
commit e619cd0d22
2 changed files with 196 additions and 0 deletions
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195
drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
View File

@ -29,6 +29,7 @@
#include "i915_random.h"
#include "mock_drm.h"
#include "mock_gem_device.h"
static void fake_free_pages(struct drm_i915_gem_object *obj,
struct sg_table *pages)
@ -901,6 +902,200 @@ static int igt_ggtt_lowlevel(void *arg)
return exercise_ggtt(arg, lowlevel_hole);
}
static void track_vma_bind(struct i915_vma *vma)
{
struct drm_i915_gem_object *obj = vma->obj;
obj->bind_count++; /* track for eviction later */
__i915_gem_object_pin_pages(obj);
vma->pages = obj->mm.pages;
list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
}
static int igt_gtt_reserve(void *arg)
{
struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj, *on;
LIST_HEAD(objects);
u64 total;
int err;
/* i915_gem_gtt_reserve() tries to reserve the precise range
* for the node, and evicts if it has to. So our test checks that
* it can give us the requsted space and prevent overlaps.
*/
/* Start by filling the GGTT */
for (total = 0;
total + 2*I915_GTT_PAGE_SIZE <= i915->ggtt.base.total;
total += 2*I915_GTT_PAGE_SIZE) {
struct i915_vma *vma;
obj = i915_gem_object_create_internal(i915, 2*PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto out;
}
err = i915_gem_object_pin_pages(obj);
if (err) {
i915_gem_object_put(obj);
goto out;
}
list_add(&obj->st_link, &objects);
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
err = i915_gem_gtt_reserve(&i915->ggtt.base, &vma->node,
obj->base.size,
total,
obj->cache_level,
0);
if (err) {
pr_err("i915_gem_gtt_reserve (pass 1) failed at %llu/%llu with err=%d\n",
total, i915->ggtt.base.total, err);
goto out;
}
track_vma_bind(vma);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
if (vma->node.start != total ||
vma->node.size != 2*I915_GTT_PAGE_SIZE) {
pr_err("i915_gem_gtt_reserve (pass 1) placement failed, found (%llx + %llx), expected (%llx + %lx)\n",
vma->node.start, vma->node.size,
total, 2*I915_GTT_PAGE_SIZE);
err = -EINVAL;
goto out;
}
}
/* Now we start forcing evictions */
for (total = I915_GTT_PAGE_SIZE;
total + 2*I915_GTT_PAGE_SIZE <= i915->ggtt.base.total;
total += 2*I915_GTT_PAGE_SIZE) {
struct i915_vma *vma;
obj = i915_gem_object_create_internal(i915, 2*PAGE_SIZE);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto out;
}
err = i915_gem_object_pin_pages(obj);
if (err) {
i915_gem_object_put(obj);
goto out;
}
list_add(&obj->st_link, &objects);
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
err = i915_gem_gtt_reserve(&i915->ggtt.base, &vma->node,
obj->base.size,
total,
obj->cache_level,
0);
if (err) {
pr_err("i915_gem_gtt_reserve (pass 2) failed at %llu/%llu with err=%d\n",
total, i915->ggtt.base.total, err);
goto out;
}
track_vma_bind(vma);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
if (vma->node.start != total ||
vma->node.size != 2*I915_GTT_PAGE_SIZE) {
pr_err("i915_gem_gtt_reserve (pass 2) placement failed, found (%llx + %llx), expected (%llx + %lx)\n",
vma->node.start, vma->node.size,
total, 2*I915_GTT_PAGE_SIZE);
err = -EINVAL;
goto out;
}
}
/* And then try at random */
list_for_each_entry_safe(obj, on, &objects, st_link) {
struct i915_vma *vma;
u64 offset;
vma = i915_vma_instance(obj, &i915->ggtt.base, NULL);
if (IS_ERR(vma)) {
err = PTR_ERR(vma);
goto out;
}
err = i915_vma_unbind(vma);
if (err) {
pr_err("i915_vma_unbind failed with err=%d!\n", err);
goto out;
}
offset = random_offset(0, i915->ggtt.base.total,
2*I915_GTT_PAGE_SIZE,
I915_GTT_MIN_ALIGNMENT);
err = i915_gem_gtt_reserve(&i915->ggtt.base, &vma->node,
obj->base.size,
offset,
obj->cache_level,
0);
if (err) {
pr_err("i915_gem_gtt_reserve (pass 3) failed at %llu/%llu with err=%d\n",
total, i915->ggtt.base.total, err);
goto out;
}
track_vma_bind(vma);
GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
if (vma->node.start != offset ||
vma->node.size != 2*I915_GTT_PAGE_SIZE) {
pr_err("i915_gem_gtt_reserve (pass 3) placement failed, found (%llx + %llx), expected (%llx + %lx)\n",
vma->node.start, vma->node.size,
offset, 2*I915_GTT_PAGE_SIZE);
err = -EINVAL;
goto out;
}
}
out:
list_for_each_entry_safe(obj, on, &objects, st_link) {
i915_gem_object_unpin_pages(obj);
i915_gem_object_put(obj);
}
return err;
}
int i915_gem_gtt_mock_selftests(void)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_gtt_reserve),
};
struct drm_i915_private *i915;
int err;
i915 = mock_gem_device();
if (!i915)
return -ENOMEM;
mutex_lock(&i915->drm.struct_mutex);
err = i915_subtests(tests, i915);
mutex_unlock(&i915->drm.struct_mutex);
drm_dev_unref(&i915->drm);
return err;
}
int i915_gem_gtt_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {

1
drivers/gpu/drm/i915/selftests/i915_mock_selftests.h
View File

@ -17,3 +17,4 @@ selftest(objects, i915_gem_object_mock_selftests)
selftest(dmabuf, i915_gem_dmabuf_mock_selftests)
selftest(vma, i915_vma_mock_selftests)
selftest(evict, i915_gem_evict_mock_selftests)
selftest(gtt, i915_gem_gtt_mock_selftests)