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Diffstat (limited to 'drivers/gpu/drm/i915/selftests/i915_gem_evict.c')
-rw-r--r--drivers/gpu/drm/i915/selftests/i915_gem_evict.c569
1 files changed, 569 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_evict.c b/drivers/gpu/drm/i915/selftests/i915_gem_evict.c
new file mode 100644
index 000000000..37068542a
--- /dev/null
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_evict.c
@@ -0,0 +1,569 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "gem/i915_gem_internal.h"
+#include "gem/i915_gem_pm.h"
+#include "gem/selftests/igt_gem_utils.h"
+#include "gem/selftests/mock_context.h"
+#include "gt/intel_gt.h"
+
+#include "i915_selftest.h"
+
+#include "igt_flush_test.h"
+#include "lib_sw_fence.h"
+#include "mock_drm.h"
+#include "mock_gem_device.h"
+
+static void quirk_add(struct drm_i915_gem_object *obj,
+ struct list_head *objects)
+{
+ /* quirk is only for live tiled objects, use it to declare ownership */
+ GEM_BUG_ON(i915_gem_object_has_tiling_quirk(obj));
+ i915_gem_object_set_tiling_quirk(obj);
+ list_add(&obj->st_link, objects);
+}
+
+static int populate_ggtt(struct i915_ggtt *ggtt, struct list_head *objects)
+{
+ struct drm_i915_gem_object *obj;
+ unsigned long count;
+
+ count = 0;
+ do {
+ struct i915_vma *vma;
+
+ obj = i915_gem_object_create_internal(ggtt->vm.i915,
+ I915_GTT_PAGE_SIZE);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
+ if (IS_ERR(vma)) {
+ i915_gem_object_put(obj);
+ if (vma == ERR_PTR(-ENOSPC))
+ break;
+
+ return PTR_ERR(vma);
+ }
+
+ quirk_add(obj, objects);
+ count++;
+ } while (1);
+ pr_debug("Filled GGTT with %lu pages [%llu total]\n",
+ count, ggtt->vm.total / PAGE_SIZE);
+
+ if (list_empty(&ggtt->vm.bound_list)) {
+ pr_err("No objects on the GGTT inactive list!\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void unpin_ggtt(struct i915_ggtt *ggtt)
+{
+ struct i915_vma *vma;
+
+ list_for_each_entry(vma, &ggtt->vm.bound_list, vm_link)
+ if (i915_gem_object_has_tiling_quirk(vma->obj))
+ i915_vma_unpin(vma);
+}
+
+static void cleanup_objects(struct i915_ggtt *ggtt, struct list_head *list)
+{
+ struct drm_i915_gem_object *obj, *on;
+
+ list_for_each_entry_safe(obj, on, list, st_link) {
+ GEM_BUG_ON(!i915_gem_object_has_tiling_quirk(obj));
+ i915_gem_object_set_tiling_quirk(obj);
+ i915_gem_object_put(obj);
+ }
+
+ i915_gem_drain_freed_objects(ggtt->vm.i915);
+}
+
+static int igt_evict_something(void *arg)
+{
+ struct intel_gt *gt = arg;
+ struct i915_ggtt *ggtt = gt->ggtt;
+ LIST_HEAD(objects);
+ int err;
+
+ /* Fill the GGTT with pinned objects and try to evict one. */
+
+ err = populate_ggtt(ggtt, &objects);
+ if (err)
+ goto cleanup;
+
+ /* Everything is pinned, nothing should happen */
+ mutex_lock(&ggtt->vm.mutex);
+ err = i915_gem_evict_something(&ggtt->vm, NULL,
+ I915_GTT_PAGE_SIZE, 0, 0,
+ 0, U64_MAX,
+ 0);
+ mutex_unlock(&ggtt->vm.mutex);
+ if (err != -ENOSPC) {
+ pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
+ err);
+ goto cleanup;
+ }
+
+ unpin_ggtt(ggtt);
+
+ /* Everything is unpinned, we should be able to evict something */
+ mutex_lock(&ggtt->vm.mutex);
+ err = i915_gem_evict_something(&ggtt->vm, NULL,
+ I915_GTT_PAGE_SIZE, 0, 0,
+ 0, U64_MAX,
+ 0);
+ mutex_unlock(&ggtt->vm.mutex);
+ if (err) {
+ pr_err("i915_gem_evict_something failed on a full GGTT with err=%d\n",
+ err);
+ goto cleanup;
+ }
+
+cleanup:
+ cleanup_objects(ggtt, &objects);
+ return err;
+}
+
+static int igt_overcommit(void *arg)
+{
+ struct intel_gt *gt = arg;
+ struct i915_ggtt *ggtt = gt->ggtt;
+ struct drm_i915_gem_object *obj;
+ struct i915_vma *vma;
+ LIST_HEAD(objects);
+ int err;
+
+ /* Fill the GGTT with pinned objects and then try to pin one more.
+ * We expect it to fail.
+ */
+
+ err = populate_ggtt(ggtt, &objects);
+ if (err)
+ goto cleanup;
+
+ obj = i915_gem_object_create_internal(gt->i915, I915_GTT_PAGE_SIZE);
+ if (IS_ERR(obj)) {
+ err = PTR_ERR(obj);
+ goto cleanup;
+ }
+
+ quirk_add(obj, &objects);
+
+ vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
+ if (vma != ERR_PTR(-ENOSPC)) {
+ pr_err("Failed to evict+insert, i915_gem_object_ggtt_pin returned err=%d\n", (int)PTR_ERR_OR_ZERO(vma));
+ err = -EINVAL;
+ goto cleanup;
+ }
+
+cleanup:
+ cleanup_objects(ggtt, &objects);
+ return err;
+}
+
+static int igt_evict_for_vma(void *arg)
+{
+ struct intel_gt *gt = arg;
+ struct i915_ggtt *ggtt = gt->ggtt;
+ struct drm_mm_node target = {
+ .start = 0,
+ .size = 4096,
+ };
+ LIST_HEAD(objects);
+ int err;
+
+ /* Fill the GGTT with pinned objects and try to evict a range. */
+
+ err = populate_ggtt(ggtt, &objects);
+ if (err)
+ goto cleanup;
+
+ /* Everything is pinned, nothing should happen */
+ mutex_lock(&ggtt->vm.mutex);
+ err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
+ mutex_unlock(&ggtt->vm.mutex);
+ if (err != -ENOSPC) {
+ pr_err("i915_gem_evict_for_node on a full GGTT returned err=%d\n",
+ err);
+ goto cleanup;
+ }
+
+ unpin_ggtt(ggtt);
+
+ /* Everything is unpinned, we should be able to evict the node */
+ mutex_lock(&ggtt->vm.mutex);
+ err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
+ mutex_unlock(&ggtt->vm.mutex);
+ if (err) {
+ pr_err("i915_gem_evict_for_node returned err=%d\n",
+ err);
+ goto cleanup;
+ }
+
+cleanup:
+ cleanup_objects(ggtt, &objects);
+ return err;
+}
+
+static void mock_color_adjust(const struct drm_mm_node *node,
+ unsigned long color,
+ u64 *start,
+ u64 *end)
+{
+}
+
+static int igt_evict_for_cache_color(void *arg)
+{
+ struct intel_gt *gt = arg;
+ struct i915_ggtt *ggtt = gt->ggtt;
+ const unsigned long flags = PIN_OFFSET_FIXED;
+ struct drm_mm_node target = {
+ .start = I915_GTT_PAGE_SIZE * 2,
+ .size = I915_GTT_PAGE_SIZE,
+ .color = I915_CACHE_LLC,
+ };
+ struct drm_i915_gem_object *obj;
+ struct i915_vma *vma;
+ LIST_HEAD(objects);
+ int err;
+
+ /*
+ * Currently the use of color_adjust for the GGTT is limited to cache
+ * coloring and guard pages, and so the presence of mm.color_adjust for
+ * the GGTT is assumed to be i915_ggtt_color_adjust, hence using a mock
+ * color adjust will work just fine for our purposes.
+ */
+ ggtt->vm.mm.color_adjust = mock_color_adjust;
+ GEM_BUG_ON(!i915_vm_has_cache_coloring(&ggtt->vm));
+
+ obj = i915_gem_object_create_internal(gt->i915, I915_GTT_PAGE_SIZE);
+ if (IS_ERR(obj)) {
+ err = PTR_ERR(obj);
+ goto cleanup;
+ }
+ i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
+ quirk_add(obj, &objects);
+
+ vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
+ I915_GTT_PAGE_SIZE | flags);
+ if (IS_ERR(vma)) {
+ pr_err("[0]i915_gem_object_ggtt_pin failed\n");
+ err = PTR_ERR(vma);
+ goto cleanup;
+ }
+
+ obj = i915_gem_object_create_internal(gt->i915, I915_GTT_PAGE_SIZE);
+ if (IS_ERR(obj)) {
+ err = PTR_ERR(obj);
+ goto cleanup;
+ }
+ i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
+ quirk_add(obj, &objects);
+
+ /* Neighbouring; same colour - should fit */
+ vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
+ (I915_GTT_PAGE_SIZE * 2) | flags);
+ if (IS_ERR(vma)) {
+ pr_err("[1]i915_gem_object_ggtt_pin failed\n");
+ err = PTR_ERR(vma);
+ goto cleanup;
+ }
+
+ i915_vma_unpin(vma);
+
+ /* Remove just the second vma */
+ mutex_lock(&ggtt->vm.mutex);
+ err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
+ mutex_unlock(&ggtt->vm.mutex);
+ if (err) {
+ pr_err("[0]i915_gem_evict_for_node returned err=%d\n", err);
+ goto cleanup;
+ }
+
+ /* Attempt to remove the first *pinned* vma, by removing the (empty)
+ * neighbour -- this should fail.
+ */
+ target.color = I915_CACHE_L3_LLC;
+
+ mutex_lock(&ggtt->vm.mutex);
+ err = i915_gem_evict_for_node(&ggtt->vm, NULL, &target, 0);
+ mutex_unlock(&ggtt->vm.mutex);
+ if (!err) {
+ pr_err("[1]i915_gem_evict_for_node returned err=%d\n", err);
+ err = -EINVAL;
+ goto cleanup;
+ }
+
+ err = 0;
+
+cleanup:
+ unpin_ggtt(ggtt);
+ cleanup_objects(ggtt, &objects);
+ ggtt->vm.mm.color_adjust = NULL;
+ return err;
+}
+
+static int igt_evict_vm(void *arg)
+{
+ struct intel_gt *gt = arg;
+ struct i915_ggtt *ggtt = gt->ggtt;
+ struct i915_gem_ww_ctx ww;
+ LIST_HEAD(objects);
+ int err;
+
+ /* Fill the GGTT with pinned objects and try to evict everything. */
+
+ err = populate_ggtt(ggtt, &objects);
+ if (err)
+ goto cleanup;
+
+ /* Everything is pinned, nothing should happen */
+ mutex_lock(&ggtt->vm.mutex);
+ err = i915_gem_evict_vm(&ggtt->vm, NULL, NULL);
+ mutex_unlock(&ggtt->vm.mutex);
+ if (err) {
+ pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
+ err);
+ goto cleanup;
+ }
+
+ unpin_ggtt(ggtt);
+
+ for_i915_gem_ww(&ww, err, false) {
+ mutex_lock(&ggtt->vm.mutex);
+ err = i915_gem_evict_vm(&ggtt->vm, &ww, NULL);
+ mutex_unlock(&ggtt->vm.mutex);
+ }
+
+ if (err) {
+ pr_err("i915_gem_evict_vm on a full GGTT returned err=%d]\n",
+ err);
+ goto cleanup;
+ }
+
+cleanup:
+ cleanup_objects(ggtt, &objects);
+ return err;
+}
+
+static int igt_evict_contexts(void *arg)
+{
+ const u64 PRETEND_GGTT_SIZE = 16ull << 20;
+ struct intel_gt *gt = arg;
+ struct i915_ggtt *ggtt = gt->ggtt;
+ struct drm_i915_private *i915 = gt->i915;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+ struct reserved {
+ struct drm_mm_node node;
+ struct reserved *next;
+ } *reserved = NULL;
+ intel_wakeref_t wakeref;
+ struct drm_mm_node hole;
+ unsigned long count;
+ int err;
+
+ /*
+ * The purpose of this test is to verify that we will trigger an
+ * eviction in the GGTT when constructing a request that requires
+ * additional space in the GGTT for pinning the context. This space
+ * is not directly tied to the request so reclaiming it requires
+ * extra work.
+ *
+ * As such this test is only meaningful for full-ppgtt environments
+ * where the GTT space of the request is separate from the GGTT
+ * allocation required to build the request.
+ */
+ if (!HAS_FULL_PPGTT(i915))
+ return 0;
+
+ wakeref = intel_runtime_pm_get(&i915->runtime_pm);
+
+ /* Reserve a block so that we know we have enough to fit a few rq */
+ memset(&hole, 0, sizeof(hole));
+ mutex_lock(&ggtt->vm.mutex);
+ err = i915_gem_gtt_insert(&ggtt->vm, NULL, &hole,
+ PRETEND_GGTT_SIZE, 0, I915_COLOR_UNEVICTABLE,
+ 0, ggtt->vm.total,
+ PIN_NOEVICT);
+ if (err)
+ goto out_locked;
+
+ /* Make the GGTT appear small by filling it with unevictable nodes */
+ count = 0;
+ do {
+ struct reserved *r;
+
+ mutex_unlock(&ggtt->vm.mutex);
+ r = kcalloc(1, sizeof(*r), GFP_KERNEL);
+ mutex_lock(&ggtt->vm.mutex);
+ if (!r) {
+ err = -ENOMEM;
+ goto out_locked;
+ }
+
+ if (i915_gem_gtt_insert(&ggtt->vm, NULL, &r->node,
+ 1ul << 20, 0, I915_COLOR_UNEVICTABLE,
+ 0, ggtt->vm.total,
+ PIN_NOEVICT)) {
+ kfree(r);
+ break;
+ }
+
+ r->next = reserved;
+ reserved = r;
+
+ count++;
+ } while (1);
+ drm_mm_remove_node(&hole);
+ mutex_unlock(&ggtt->vm.mutex);
+ pr_info("Filled GGTT with %lu 1MiB nodes\n", count);
+
+ /* Overfill the GGTT with context objects and so try to evict one. */
+ for_each_engine(engine, gt, id) {
+ struct i915_sw_fence fence;
+ struct i915_request *last = NULL;
+
+ count = 0;
+ onstack_fence_init(&fence);
+ do {
+ struct intel_context *ce;
+ struct i915_request *rq;
+
+ ce = intel_context_create(engine);
+ if (IS_ERR(ce))
+ break;
+
+ /* We will need some GGTT space for the rq's context */
+ igt_evict_ctl.fail_if_busy = true;
+ rq = intel_context_create_request(ce);
+ igt_evict_ctl.fail_if_busy = false;
+ intel_context_put(ce);
+
+ if (IS_ERR(rq)) {
+ /* When full, fail_if_busy will trigger EBUSY */
+ if (PTR_ERR(rq) != -EBUSY) {
+ pr_err("Unexpected error from request alloc (on %s): %d\n",
+ engine->name,
+ (int)PTR_ERR(rq));
+ err = PTR_ERR(rq);
+ }
+ break;
+ }
+
+ /* Keep every request/ctx pinned until we are full */
+ err = i915_sw_fence_await_sw_fence_gfp(&rq->submit,
+ &fence,
+ GFP_KERNEL);
+ if (err < 0)
+ break;
+
+ i915_request_add(rq);
+ count++;
+ if (last)
+ i915_request_put(last);
+ last = i915_request_get(rq);
+ err = 0;
+ } while(1);
+ onstack_fence_fini(&fence);
+ pr_info("Submitted %lu contexts/requests on %s\n",
+ count, engine->name);
+ if (err)
+ break;
+ if (last) {
+ if (i915_request_wait(last, 0, HZ) < 0) {
+ err = -EIO;
+ i915_request_put(last);
+ pr_err("Failed waiting for last request (on %s)",
+ engine->name);
+ break;
+ }
+ i915_request_put(last);
+ }
+ err = intel_gt_wait_for_idle(engine->gt, HZ * 3);
+ if (err) {
+ pr_err("Failed to idle GT (on %s)", engine->name);
+ break;
+ }
+ }
+
+ mutex_lock(&ggtt->vm.mutex);
+out_locked:
+ if (igt_flush_test(i915))
+ err = -EIO;
+ while (reserved) {
+ struct reserved *next = reserved->next;
+
+ drm_mm_remove_node(&reserved->node);
+ kfree(reserved);
+
+ reserved = next;
+ }
+ if (drm_mm_node_allocated(&hole))
+ drm_mm_remove_node(&hole);
+ mutex_unlock(&ggtt->vm.mutex);
+ intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+
+ return err;
+}
+
+int i915_gem_evict_mock_selftests(void)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(igt_evict_something),
+ SUBTEST(igt_evict_for_vma),
+ SUBTEST(igt_evict_for_cache_color),
+ SUBTEST(igt_evict_vm),
+ SUBTEST(igt_overcommit),
+ };
+ struct drm_i915_private *i915;
+ intel_wakeref_t wakeref;
+ int err = 0;
+
+ i915 = mock_gem_device();
+ if (!i915)
+ return -ENOMEM;
+
+ with_intel_runtime_pm(&i915->runtime_pm, wakeref)
+ err = i915_subtests(tests, to_gt(i915));
+
+ mock_destroy_device(i915);
+ return err;
+}
+
+int i915_gem_evict_live_selftests(struct drm_i915_private *i915)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(igt_evict_contexts),
+ };
+
+ if (intel_gt_is_wedged(to_gt(i915)))
+ return 0;
+
+ return intel_gt_live_subtests(tests, to_gt(i915));
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 02:01:29 +0000