[PATCH v11 07/10] drm/ttm/tests: Add test cases dependent on fence signaling
Karolina Stolarek
karolina.stolarek at intel.com
Wed Apr 17 13:03:20 UTC 2024
Add test cases that check how the state of dma fences in BO's
reservation object influence the ttm_bo_validation() flow. Do similar
tests for resource manager's move fence.
Signed-off-by: Karolina Stolarek <karolina.stolarek at intel.com>
Reviewed-by: Somalapuram, Amaranath <asomalap at amd.com>
Tested-by: Somalapuram, Amaranath <asomalap at amd.com>
---
.../gpu/drm/ttm/tests/ttm_bo_validate_test.c | 305 ++++++++++++++++++
1 file changed, 305 insertions(+)
diff --git a/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c b/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c
index 4e93076cf36c..27ab09aa8311 100644
--- a/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c
+++ b/drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c
@@ -2,6 +2,8 @@
/*
* Copyright © 2023 Intel Corporation
*/
+#include <linux/delay.h>
+#include <linux/kthread.h>
#include <drm/ttm/ttm_resource.h>
#include <drm/ttm/ttm_placement.h>
@@ -13,11 +15,14 @@
#define BO_SIZE SZ_4K
#define MANAGER_SIZE SZ_1M
+static struct spinlock fence_lock;
+
struct ttm_bo_validate_test_case {
const char *description;
enum ttm_bo_type bo_type;
uint32_t mem_type;
bool with_ttm;
+ bool no_gpu_wait;
};
static struct ttm_placement *ttm_placement_kunit_init(struct kunit *test,
@@ -35,6 +40,43 @@ static struct ttm_placement *ttm_placement_kunit_init(struct kunit *test,
return placement;
}
+static const char *fence_name(struct dma_fence *f)
+{
+ return "ttm-bo-validate-fence";
+}
+
+static const struct dma_fence_ops fence_ops = {
+ .get_driver_name = fence_name,
+ .get_timeline_name = fence_name,
+};
+
+static struct dma_fence *alloc_mock_fence(struct kunit *test)
+{
+ struct dma_fence *fence;
+
+ fence = kunit_kzalloc(test, sizeof(*fence), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, fence);
+
+ dma_fence_init(fence, &fence_ops, &fence_lock, 0, 0);
+
+ return fence;
+}
+
+static void dma_resv_kunit_active_fence_init(struct kunit *test,
+ struct dma_resv *resv,
+ enum dma_resv_usage usage)
+{
+ struct dma_fence *fence;
+
+ fence = alloc_mock_fence(test);
+ dma_fence_enable_sw_signaling(fence);
+
+ dma_resv_lock(resv, NULL);
+ dma_resv_reserve_fences(resv, 1);
+ dma_resv_add_fence(resv, fence, usage);
+ dma_resv_unlock(resv);
+}
+
static void ttm_bo_validate_case_desc(const struct ttm_bo_validate_test_case *t,
char *desc)
{
@@ -460,6 +502,262 @@ static void ttm_bo_validate_multihop(struct kunit *test)
ttm_mock_manager_fini(priv->ttm_dev, tmp_mem);
}
+static const struct ttm_bo_validate_test_case ttm_bo_no_placement_cases[] = {
+ {
+ .description = "Buffer object in system domain, no page vector",
+ },
+ {
+ .description = "Buffer object in system domain with an existing page vector",
+ .with_ttm = true,
+ },
+};
+
+KUNIT_ARRAY_PARAM(ttm_bo_no_placement, ttm_bo_no_placement_cases,
+ ttm_bo_validate_case_desc);
+
+static void ttm_bo_validate_no_placement_signaled(struct kunit *test)
+{
+ const struct ttm_bo_validate_test_case *params = test->param_value;
+ enum ttm_bo_type bo_type = ttm_bo_type_device;
+ struct ttm_test_devices *priv = test->priv;
+ uint32_t size = ALIGN(BO_SIZE, PAGE_SIZE);
+ struct ttm_operation_ctx ctx = { };
+ uint32_t mem_type = TTM_PL_SYSTEM;
+ struct ttm_resource_manager *man;
+ struct ttm_placement *placement;
+ struct ttm_buffer_object *bo;
+ struct ttm_place *place;
+ struct ttm_tt *old_tt;
+ uint32_t flags;
+ int err;
+
+ place = ttm_place_kunit_init(test, mem_type, 0);
+ man = ttm_manager_type(priv->ttm_dev, mem_type);
+
+ bo = ttm_bo_kunit_init(test, test->priv, size);
+ bo->type = bo_type;
+
+ if (params->with_ttm) {
+ old_tt = priv->ttm_dev->funcs->ttm_tt_create(bo, 0);
+ ttm_pool_alloc(&priv->ttm_dev->pool, old_tt, &ctx);
+ bo->ttm = old_tt;
+ }
+
+ err = ttm_resource_alloc(bo, place, &bo->resource);
+ KUNIT_EXPECT_EQ(test, err, 0);
+ KUNIT_ASSERT_EQ(test, man->usage, size);
+
+ placement = kunit_kzalloc(test, sizeof(*placement), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, placement);
+
+ ttm_bo_reserve(bo, false, false, NULL);
+ err = ttm_bo_validate(bo, placement, &ctx);
+ ttm_bo_unreserve(bo);
+
+ KUNIT_EXPECT_EQ(test, err, 0);
+ KUNIT_ASSERT_EQ(test, man->usage, 0);
+ KUNIT_ASSERT_NOT_NULL(test, bo->ttm);
+ KUNIT_EXPECT_EQ(test, ctx.bytes_moved, 0);
+
+ if (params->with_ttm) {
+ flags = bo->ttm->page_flags;
+
+ KUNIT_ASSERT_PTR_EQ(test, bo->ttm, old_tt);
+ KUNIT_ASSERT_FALSE(test, flags & TTM_TT_FLAG_PRIV_POPULATED);
+ KUNIT_ASSERT_TRUE(test, flags & TTM_TT_FLAG_ZERO_ALLOC);
+ }
+
+ ttm_bo_put(bo);
+}
+
+static int threaded_dma_resv_signal(void *arg)
+{
+ struct ttm_buffer_object *bo = arg;
+ struct dma_resv *resv = bo->base.resv;
+ struct dma_resv_iter cursor;
+ struct dma_fence *fence;
+
+ dma_resv_iter_begin(&cursor, resv, DMA_RESV_USAGE_BOOKKEEP);
+ dma_resv_for_each_fence_unlocked(&cursor, fence) {
+ dma_fence_signal(fence);
+ }
+ dma_resv_iter_end(&cursor);
+
+ return 0;
+}
+
+static void ttm_bo_validate_no_placement_not_signaled(struct kunit *test)
+{
+ const struct ttm_bo_validate_test_case *params = test->param_value;
+ enum dma_resv_usage usage = DMA_RESV_USAGE_BOOKKEEP;
+ uint32_t size = ALIGN(BO_SIZE, PAGE_SIZE);
+ struct ttm_operation_ctx ctx = { };
+ uint32_t mem_type = TTM_PL_SYSTEM;
+ struct ttm_placement *placement;
+ struct ttm_buffer_object *bo;
+ struct task_struct *task;
+ struct ttm_place *place;
+ int err;
+
+ place = ttm_place_kunit_init(test, mem_type, 0);
+
+ bo = ttm_bo_kunit_init(test, test->priv, size);
+ bo->type = params->bo_type;
+
+ err = ttm_resource_alloc(bo, place, &bo->resource);
+ KUNIT_EXPECT_EQ(test, err, 0);
+
+ placement = kunit_kzalloc(test, sizeof(*placement), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, placement);
+
+ /* Create an active fence to simulate a non-idle resv object */
+ spin_lock_init(&fence_lock);
+ dma_resv_kunit_active_fence_init(test, bo->base.resv, usage);
+
+ task = kthread_create(threaded_dma_resv_signal, bo, "dma-resv-signal");
+ if (IS_ERR(task))
+ KUNIT_FAIL(test, "Couldn't create dma resv signal task\n");
+
+ wake_up_process(task);
+ ttm_bo_reserve(bo, false, false, NULL);
+ err = ttm_bo_validate(bo, placement, &ctx);
+ ttm_bo_unreserve(bo);
+
+ KUNIT_EXPECT_EQ(test, err, 0);
+ KUNIT_ASSERT_NOT_NULL(test, bo->ttm);
+ KUNIT_ASSERT_NULL(test, bo->resource);
+ KUNIT_ASSERT_NULL(test, bo->bulk_move);
+ KUNIT_EXPECT_EQ(test, ctx.bytes_moved, 0);
+
+ if (bo->type != ttm_bo_type_sg)
+ KUNIT_ASSERT_PTR_EQ(test, bo->base.resv, &bo->base._resv);
+
+ /* Make sure we have an idle object at this point */
+ dma_resv_wait_timeout(bo->base.resv, usage, false, MAX_SCHEDULE_TIMEOUT);
+
+ ttm_bo_put(bo);
+}
+
+static void ttm_bo_validate_move_fence_signaled(struct kunit *test)
+{
+ enum ttm_bo_type bo_type = ttm_bo_type_device;
+ struct ttm_test_devices *priv = test->priv;
+ uint32_t size = ALIGN(BO_SIZE, PAGE_SIZE);
+ struct ttm_operation_ctx ctx = { };
+ uint32_t mem_type = TTM_PL_SYSTEM;
+ struct ttm_resource_manager *man;
+ struct ttm_placement *placement;
+ struct ttm_buffer_object *bo;
+ struct ttm_place *place;
+ int err;
+
+ man = ttm_manager_type(priv->ttm_dev, mem_type);
+ man->move = dma_fence_get_stub();
+
+ bo = ttm_bo_kunit_init(test, test->priv, size);
+ bo->type = bo_type;
+
+ place = ttm_place_kunit_init(test, mem_type, 0);
+ placement = ttm_placement_kunit_init(test, place, 1);
+
+ ttm_bo_reserve(bo, false, false, NULL);
+ err = ttm_bo_validate(bo, placement, &ctx);
+ ttm_bo_unreserve(bo);
+
+ KUNIT_EXPECT_EQ(test, err, 0);
+ KUNIT_EXPECT_EQ(test, bo->resource->mem_type, mem_type);
+ KUNIT_EXPECT_EQ(test, ctx.bytes_moved, size);
+
+ ttm_bo_put(bo);
+ dma_fence_put(man->move);
+}
+
+static const struct ttm_bo_validate_test_case ttm_bo_validate_wait_cases[] = {
+ {
+ .description = "Waits for GPU",
+ .no_gpu_wait = false,
+ },
+ {
+ .description = "Tries to lock straight away",
+ .no_gpu_wait = true,
+ },
+};
+
+KUNIT_ARRAY_PARAM(ttm_bo_validate_wait, ttm_bo_validate_wait_cases,
+ ttm_bo_validate_case_desc);
+
+static int threaded_fence_signal(void *arg)
+{
+ struct dma_fence *fence = arg;
+
+ msleep(20);
+
+ return dma_fence_signal(fence);
+}
+
+static void ttm_bo_validate_move_fence_not_signaled(struct kunit *test)
+{
+ const struct ttm_bo_validate_test_case *params = test->param_value;
+ struct ttm_operation_ctx ctx_init = { },
+ ctx_val = { .no_wait_gpu = params->no_gpu_wait };
+ uint32_t fst_mem = TTM_PL_VRAM, snd_mem = TTM_PL_VRAM + 1;
+ struct ttm_placement *placement_init, *placement_val;
+ enum ttm_bo_type bo_type = ttm_bo_type_device;
+ struct ttm_test_devices *priv = test->priv;
+ uint32_t size = ALIGN(BO_SIZE, PAGE_SIZE);
+ struct ttm_place *init_place, places[2];
+ struct ttm_resource_manager *man;
+ struct ttm_buffer_object *bo;
+ struct task_struct *task;
+ int err;
+
+ init_place = ttm_place_kunit_init(test, TTM_PL_SYSTEM, 0);
+ placement_init = ttm_placement_kunit_init(test, init_place, 1);
+
+ bo = kunit_kzalloc(test, sizeof(*bo), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, bo);
+
+ drm_gem_private_object_init(priv->drm, &bo->base, size);
+
+ err = ttm_bo_init_reserved(priv->ttm_dev, bo, bo_type, placement_init,
+ PAGE_SIZE, &ctx_init, NULL, NULL,
+ &dummy_ttm_bo_destroy);
+ KUNIT_EXPECT_EQ(test, err, 0);
+
+ ttm_mock_manager_init(priv->ttm_dev, fst_mem, MANAGER_SIZE);
+ ttm_mock_manager_init(priv->ttm_dev, snd_mem, MANAGER_SIZE);
+
+ places[0] = (struct ttm_place){ .mem_type = fst_mem, .flags = TTM_PL_FLAG_DESIRED };
+ places[1] = (struct ttm_place){ .mem_type = snd_mem, .flags = TTM_PL_FLAG_FALLBACK };
+ placement_val = ttm_placement_kunit_init(test, places, 2);
+
+ spin_lock_init(&fence_lock);
+ man = ttm_manager_type(priv->ttm_dev, fst_mem);
+ man->move = alloc_mock_fence(test);
+
+ task = kthread_create(threaded_fence_signal, man->move, "move-fence-signal");
+ if (IS_ERR(task))
+ KUNIT_FAIL(test, "Couldn't create move fence signal task\n");
+
+ wake_up_process(task);
+ err = ttm_bo_validate(bo, placement_val, &ctx_val);
+ dma_resv_unlock(bo->base.resv);
+
+ dma_fence_wait_timeout(man->move, false, MAX_SCHEDULE_TIMEOUT);
+
+ KUNIT_EXPECT_EQ(test, err, 0);
+ KUNIT_EXPECT_EQ(test, ctx_val.bytes_moved, size);
+
+ if (params->no_gpu_wait)
+ KUNIT_EXPECT_EQ(test, bo->resource->mem_type, snd_mem);
+ else
+ KUNIT_EXPECT_EQ(test, bo->resource->mem_type, fst_mem);
+
+ ttm_bo_put(bo);
+ ttm_mock_manager_fini(priv->ttm_dev, fst_mem);
+ ttm_mock_manager_fini(priv->ttm_dev, snd_mem);
+}
+
static struct kunit_case ttm_bo_validate_test_cases[] = {
KUNIT_CASE_PARAM(ttm_bo_init_reserved_sys_man, ttm_bo_types_gen_params),
KUNIT_CASE_PARAM(ttm_bo_init_reserved_mock_man, ttm_bo_types_gen_params),
@@ -472,6 +770,13 @@ static struct kunit_case ttm_bo_validate_test_cases[] = {
KUNIT_CASE(ttm_bo_validate_pinned),
KUNIT_CASE(ttm_bo_validate_busy_placement),
KUNIT_CASE_PARAM(ttm_bo_validate_multihop, ttm_bo_types_gen_params),
+ KUNIT_CASE_PARAM(ttm_bo_validate_no_placement_signaled,
+ ttm_bo_no_placement_gen_params),
+ KUNIT_CASE_PARAM(ttm_bo_validate_no_placement_not_signaled,
+ ttm_bo_types_gen_params),
+ KUNIT_CASE(ttm_bo_validate_move_fence_signaled),
+ KUNIT_CASE_PARAM(ttm_bo_validate_move_fence_not_signaled,
+ ttm_bo_validate_wait_gen_params),
{}
};
--
2.34.1
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