[Intel-gfx] [PATCH 32/46] drm/i915: Exercise filling the top/bottom portions of the ppgtt
Chris Wilson
chris at chris-wilson.co.uk
Thu Feb 2 09:08:51 UTC 2017
Allocate objects with varying number of pages (which should hopefully
consist of a mixture of contiguous page chunks and so coalesced sg
lists) and check that the sg walkers in insert_pages cope.
v2: Check both small <-> large
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 362 ++++++++++++++++++++++++++
1 file changed, 362 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
index 5c09dc920cb8..4cd55fc0820a 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
@@ -22,8 +22,101 @@
*
*/
+#include <linux/prime_numbers.h>
+
#include "../i915_selftest.h"
+#include "mock_drm.h"
+
+static void fake_free_pages(struct drm_i915_gem_object *obj,
+ struct sg_table *pages)
+{
+ sg_free_table(pages);
+ kfree(pages);
+}
+
+static struct sg_table *
+fake_get_pages(struct drm_i915_gem_object *obj)
+{
+#define GFP (GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY)
+#define PFN_BIAS 0x1000
+ struct sg_table *pages;
+ struct scatterlist *sg;
+ typeof(obj->base.size) rem;
+
+ pages = kmalloc(sizeof(*pages), GFP);
+ if (!pages)
+ return ERR_PTR(-ENOMEM);
+
+ rem = round_up(obj->base.size, BIT(31)) >> 31;
+ if (sg_alloc_table(pages, rem, GFP)) {
+ kfree(pages);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ rem = obj->base.size;
+ for (sg = pages->sgl; sg; sg = sg_next(sg)) {
+ unsigned long len = min_t(typeof(rem), rem, BIT(31));
+
+ sg_set_page(sg, pfn_to_page(PFN_BIAS), len, 0);
+ sg_dma_address(sg) = page_to_phys(sg_page(sg));
+ sg_dma_len(sg) = len;
+
+ rem -= len;
+ }
+
+ return pages;
+#undef GFP
+}
+
+static void fake_put_pages(struct drm_i915_gem_object *obj,
+ struct sg_table *pages)
+{
+ fake_free_pages(obj, pages);
+ obj->mm.dirty = false;
+}
+
+static void fake_release(struct drm_i915_gem_object *obj)
+{
+ __i915_gem_object_unpin_pages(obj);
+}
+
+static const struct drm_i915_gem_object_ops fake_ops = {
+ .get_pages = fake_get_pages,
+ .put_pages = fake_put_pages,
+ .release = fake_release
+};
+
+static struct drm_i915_gem_object *
+fake_dma_object(struct drm_i915_private *i915, u64 size)
+{
+ struct drm_i915_gem_object *obj;
+
+ GEM_BUG_ON(!size);
+ GEM_BUG_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE));
+
+ if (overflows_type(size, obj->base.size))
+ return ERR_PTR(-E2BIG);
+
+ obj = i915_gem_object_alloc(i915);
+ if (!obj)
+ return ERR_PTR(-ENOMEM);
+
+ drm_gem_private_object_init(&i915->drm, &obj->base, size);
+ i915_gem_object_init(obj, &fake_ops);
+
+ obj->base.write_domain = I915_GEM_DOMAIN_CPU;
+ obj->base.read_domains = I915_GEM_DOMAIN_CPU;
+ obj->cache_level = I915_CACHE_NONE;
+
+ if (i915_gem_object_pin_pages(obj)) {
+ i915_gem_object_free(obj);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return obj;
+}
+
static int igt_ppgtt_alloc(void *arg)
{
struct drm_i915_private *dev_priv = arg;
@@ -87,10 +180,279 @@ static int igt_ppgtt_alloc(void *arg)
return err;
}
+static void close_object_list(struct list_head *objects,
+ struct i915_address_space *vm)
+{
+ struct drm_i915_gem_object *obj, *on;
+
+ list_for_each_entry_safe(obj, on, objects, batch_pool_link) {
+ struct i915_vma *vma;
+
+ vma = i915_vma_instance(obj, vm, NULL);
+ if (!IS_ERR(vma))
+ i915_vma_close(vma);
+
+ list_del(&obj->batch_pool_link);
+ i915_gem_object_put(obj);
+ }
+}
+
+static int fill_hole(struct drm_i915_private *i915,
+ struct i915_address_space *vm,
+ u64 hole_start, u64 hole_end,
+ unsigned long end_time)
+{
+#define FLAGS (PIN_USER | PIN_OFFSET_FIXED)
+ const u64 hole_size = hole_end - hole_start;
+ struct drm_i915_gem_object *obj;
+ const unsigned long max_pages =
+ min_t(u64, ULONG_MAX - 1, hole_size/2 >> PAGE_SHIFT);
+ const unsigned long max_step = max(int_sqrt(max_pages), 2UL);
+ unsigned long npages, prime;
+ struct i915_vma *vma;
+ LIST_HEAD(objects);
+ int err;
+
+ /* Try binding many VMA working inwards from either edge */
+
+ for_each_prime_number_from(prime, 2, max_step) {
+ for (npages = 1; npages <= max_pages; npages *= prime) {
+ const u64 full_size = npages << PAGE_SHIFT;
+ const struct {
+ const char *name;
+ u64 offset;
+ int step;
+ } phases[] = {
+ { "top-down", hole_end, -1, },
+ { "bottom-up", hole_start, 1, },
+ { }
+ }, *p;
+
+ obj = fake_dma_object(i915, full_size);
+ if (IS_ERR(obj))
+ break;
+
+ list_add(&obj->batch_pool_link, &objects);
+
+ /* Align differing sized objects against the edges, and
+ * check we don't walk off into the void when binding
+ * them into the GTT.
+ */
+ for (p = phases; p->name; p++) {
+ u64 offset;
+
+ offset = p->offset;
+ list_for_each_entry(obj, &objects, batch_pool_link) {
+ vma = i915_vma_instance(obj, vm, NULL);
+ if (IS_ERR(vma))
+ continue;
+
+ if (p->step < 0) {
+ if (offset < hole_start + obj->base.size)
+ break;
+ offset -= obj->base.size;
+ }
+
+ err = i915_vma_pin(vma, 0, 0, offset | FLAGS);
+ if (err) {
+ pr_err("%s(%s) pin (forward) failed with err=%d on size=%lu pages (prime=%lu), offset=%llx\n",
+ __func__, p->name, err, npages, prime, offset);
+ goto err;
+ }
+
+ if (!drm_mm_node_allocated(&vma->node) ||
+ i915_vma_misplaced(vma, 0, 0, offset | FLAGS)) {
+ pr_err("%s(%s) (forward) insert failed: vma.node=%llx + %llx [allocated? %d], expected offset %llx\n",
+ __func__, p->name, vma->node.start, vma->node.size, drm_mm_node_allocated(&vma->node),
+ offset);
+ err = -EINVAL;
+ goto err;
+ }
+
+ i915_vma_unpin(vma);
+
+ if (p->step > 0) {
+ if (offset + obj->base.size > hole_end)
+ break;
+ offset += obj->base.size;
+ }
+ }
+
+ offset = p->offset;
+ list_for_each_entry(obj, &objects, batch_pool_link) {
+ vma = i915_vma_instance(obj, vm, NULL);
+ if (IS_ERR(vma))
+ continue;
+
+ if (p->step < 0) {
+ if (offset < hole_start + obj->base.size)
+ break;
+ offset -= obj->base.size;
+ }
+
+ if (!drm_mm_node_allocated(&vma->node) ||
+ i915_vma_misplaced(vma, 0, 0, offset | FLAGS)) {
+ pr_err("%s(%s) (forward) moved vma.node=%llx + %llx, expected offset %llx\n",
+ __func__, p->name, vma->node.start, vma->node.size,
+ offset);
+ err = -EINVAL;
+ goto err;
+ }
+
+ err = i915_vma_unbind(vma);
+ if (err) {
+ pr_err("%s(%s) (forward) unbind of vma.node=%llx + %llx failed with err=%d\n",
+ __func__, p->name, vma->node.start, vma->node.size,
+ err);
+ goto err;
+ }
+
+ if (p->step > 0) {
+ if (offset + obj->base.size > hole_end)
+ break;
+ offset += obj->base.size;
+ }
+ }
+
+ offset = p->offset;
+ list_for_each_entry_reverse(obj, &objects, batch_pool_link) {
+ vma = i915_vma_instance(obj, vm, NULL);
+ if (IS_ERR(vma))
+ continue;
+
+ if (p->step < 0) {
+ if (offset < hole_start + obj->base.size)
+ break;
+ offset -= obj->base.size;
+ }
+
+ err = i915_vma_pin(vma, 0, 0, offset | FLAGS);
+ if (err) {
+ pr_err("%s(%s) pin (backward) failed with err=%d on size=%lu pages (prime=%lu), offset=%llx\n",
+ __func__, p->name, err, npages, prime, offset);
+ goto err;
+ }
+
+ if (!drm_mm_node_allocated(&vma->node) ||
+ i915_vma_misplaced(vma, 0, 0, offset | FLAGS)) {
+ pr_err("%s(%s) (backward) insert failed: vma.node=%llx + %llx [allocated? %d], expected offset %llx\n",
+ __func__, p->name, vma->node.start, vma->node.size, drm_mm_node_allocated(&vma->node),
+ offset);
+ err = -EINVAL;
+ goto err;
+ }
+
+ i915_vma_unpin(vma);
+
+ if (p->step > 0) {
+ if (offset + obj->base.size > hole_end)
+ break;
+ offset += obj->base.size;
+ }
+ }
+
+ offset = p->offset;
+ list_for_each_entry_reverse(obj, &objects, batch_pool_link) {
+ vma = i915_vma_instance(obj, vm, NULL);
+ if (IS_ERR(vma))
+ continue;
+
+ if (p->step < 0) {
+ if (offset < hole_start + obj->base.size)
+ break;
+ offset -= obj->base.size;
+ }
+
+ if (!drm_mm_node_allocated(&vma->node) ||
+ i915_vma_misplaced(vma, 0, 0, offset | FLAGS)) {
+ pr_err("%s(%s) (backward) moved vma.node=%llx + %llx [allocated? %d], expected offset %llx\n",
+ __func__, p->name, vma->node.start, vma->node.size, drm_mm_node_allocated(&vma->node),
+ offset);
+ err = -EINVAL;
+ goto err;
+ }
+
+ err = i915_vma_unbind(vma);
+ if (err) {
+ pr_err("%s(%s) (backward) unbind of vma.node=%llx + %llx failed with err=%d\n",
+ __func__, p->name, vma->node.start, vma->node.size,
+ err);
+ goto err;
+ }
+
+ if (p->step > 0) {
+ if (offset + obj->base.size > hole_end)
+ break;
+ offset += obj->base.size;
+ }
+ }
+ }
+
+ if (igt_timeout(end_time, "%s timed out (npages=%lu, prime=%lu)\n",
+ __func__, npages, prime)) {
+ err = -EINTR;
+ goto err;
+ }
+ }
+
+ close_object_list(&objects, vm);
+ }
+
+ return 0;
+
+err:
+ close_object_list(&objects, vm);
+ return err;
+#undef FLAGS
+}
+
+static int exercise_ppgtt(struct drm_i915_private *dev_priv,
+ int (*func)(struct drm_i915_private *i915,
+ struct i915_address_space *vm,
+ u64 hole_start, u64 hole_end,
+ unsigned long end_time))
+{
+ struct drm_file *file;
+ struct i915_hw_ppgtt *ppgtt;
+ IGT_TIMEOUT(end_time);
+ int err;
+
+ if (!USES_FULL_PPGTT(dev_priv))
+ return 0;
+
+ file = mock_file(dev_priv);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+
+ mutex_lock(&dev_priv->drm.struct_mutex);
+ ppgtt = i915_ppgtt_create(dev_priv, file->driver_priv, "mock");
+ if (IS_ERR(ppgtt)) {
+ err = PTR_ERR(ppgtt);
+ goto out_unlock;
+ }
+ GEM_BUG_ON(offset_in_page(ppgtt->base.total));
+
+ err = func(dev_priv, &ppgtt->base, 0, ppgtt->base.total, end_time);
+
+ i915_ppgtt_close(&ppgtt->base);
+ i915_ppgtt_put(ppgtt);
+out_unlock:
+ mutex_unlock(&dev_priv->drm.struct_mutex);
+
+ mock_file_free(dev_priv, file);
+ return err;
+}
+
+static int igt_ppgtt_fill(void *arg)
+{
+ return exercise_ppgtt(arg, fill_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_fill),
};
return i915_subtests(tests, i915);
--
2.11.0
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