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[2.34.27.228]) by smtp.gmail.com with ESMTPSA id h18-20020a05620a10b200b00765ab6d3e81sm550221qkk.122.2023.07.18.06.03.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Jul 2023 06:03:28 -0700 (PDT) From: Marco Pagani To: Moritz Fischer , Wu Hao , Xu Yilun , Tom Rix Cc: Marco Pagani , linux-kernel@vger.kernel.org, linux-fpga@vger.kernel.org Subject: [PATCH v10 2/4] fpga: add an initial KUnit suite for the FPGA Bridge Date: Tue, 18 Jul 2023 15:03:02 +0200 Message-ID: <20230718130304.87048-3-marpagan@redhat.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230718130304.87048-1-marpagan@redhat.com> References: <20230718130304.87048-1-marpagan@redhat.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org The suite tests the basic behaviors of the FPGA Bridge including the functions that operate on a list of bridges. Signed-off-by: Marco Pagani Acked-by: Xu Yilun --- drivers/fpga/tests/fpga-bridge-test.c | 175 ++++++++++++++++++++++++++ 1 file changed, 175 insertions(+) create mode 100644 drivers/fpga/tests/fpga-bridge-test.c diff --git a/drivers/fpga/tests/fpga-bridge-test.c b/drivers/fpga/tests/fpga-bridge-test.c new file mode 100644 index 000000000000..1d258002cdd7 --- /dev/null +++ b/drivers/fpga/tests/fpga-bridge-test.c @@ -0,0 +1,175 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit test for the FPGA Bridge + * + * Copyright (C) 2023 Red Hat, Inc. + * + * Author: Marco Pagani + */ + +#include +#include +#include +#include +#include + +struct bridge_stats { + bool enable; +}; + +struct bridge_ctx { + struct fpga_bridge *bridge; + struct platform_device *pdev; + struct bridge_stats stats; +}; + +static int op_enable_set(struct fpga_bridge *bridge, bool enable) +{ + struct bridge_stats *stats = bridge->priv; + + stats->enable = enable; + + return 0; +} + +/* + * Fake FPGA bridge that implements only the enable_set op to track + * the state. + */ +static const struct fpga_bridge_ops fake_bridge_ops = { + .enable_set = op_enable_set, +}; + +/** + * register_test_bridge() - Register a fake FPGA bridge for testing. + * @test: KUnit test context object. + * + * Return: Context of the newly registered FPGA bridge. + */ +static struct bridge_ctx *register_test_bridge(struct kunit *test) +{ + struct bridge_ctx *ctx; + + ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); + + ctx->pdev = platform_device_register_simple("bridge_pdev", PLATFORM_DEVID_AUTO, NULL, 0); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx->pdev); + + ctx->bridge = fpga_bridge_register(&ctx->pdev->dev, "Fake FPGA bridge", &fake_bridge_ops, + &ctx->stats); + KUNIT_ASSERT_FALSE(test, IS_ERR_OR_NULL(ctx->bridge)); + + return ctx; +} + +static void unregister_test_bridge(struct bridge_ctx *ctx) +{ + fpga_bridge_unregister(ctx->bridge); + platform_device_unregister(ctx->pdev); +} + +static void fpga_bridge_test_get(struct kunit *test) +{ + struct bridge_ctx *ctx = test->priv; + struct fpga_bridge *bridge; + + bridge = fpga_bridge_get(&ctx->pdev->dev, NULL); + KUNIT_EXPECT_PTR_EQ(test, bridge, ctx->bridge); + + bridge = fpga_bridge_get(&ctx->pdev->dev, NULL); + KUNIT_EXPECT_EQ(test, PTR_ERR(bridge), -EBUSY); + + fpga_bridge_put(ctx->bridge); +} + +static void fpga_bridge_test_toggle(struct kunit *test) +{ + struct bridge_ctx *ctx = test->priv; + int ret; + + ret = fpga_bridge_disable(ctx->bridge); + KUNIT_EXPECT_EQ(test, ret, 0); + KUNIT_EXPECT_FALSE(test, ctx->stats.enable); + + ret = fpga_bridge_enable(ctx->bridge); + KUNIT_EXPECT_EQ(test, ret, 0); + KUNIT_EXPECT_TRUE(test, ctx->stats.enable); +} + +/* Test the functions for getting and controlling a list of bridges */ +static void fpga_bridge_test_get_put_list(struct kunit *test) +{ + struct list_head bridge_list; + struct bridge_ctx *ctx_0, *ctx_1; + int ret; + + ctx_0 = test->priv; + ctx_1 = register_test_bridge(test); + + INIT_LIST_HEAD(&bridge_list); + + /* Get bridge 0 and add it to the list */ + ret = fpga_bridge_get_to_list(&ctx_0->pdev->dev, NULL, &bridge_list); + KUNIT_EXPECT_EQ(test, ret, 0); + + KUNIT_EXPECT_PTR_EQ(test, ctx_0->bridge, + list_first_entry_or_null(&bridge_list, struct fpga_bridge, node)); + + /* Get bridge 1 and add it to the list */ + ret = fpga_bridge_get_to_list(&ctx_1->pdev->dev, NULL, &bridge_list); + KUNIT_EXPECT_EQ(test, ret, 0); + + KUNIT_EXPECT_PTR_EQ(test, ctx_1->bridge, + list_first_entry_or_null(&bridge_list, struct fpga_bridge, node)); + + /* Disable an then enable both bridges from the list */ + ret = fpga_bridges_disable(&bridge_list); + KUNIT_EXPECT_EQ(test, ret, 0); + + KUNIT_EXPECT_FALSE(test, ctx_0->stats.enable); + KUNIT_EXPECT_FALSE(test, ctx_1->stats.enable); + + ret = fpga_bridges_enable(&bridge_list); + KUNIT_EXPECT_EQ(test, ret, 0); + + KUNIT_EXPECT_TRUE(test, ctx_0->stats.enable); + KUNIT_EXPECT_TRUE(test, ctx_1->stats.enable); + + /* Put and remove both bridges from the list */ + fpga_bridges_put(&bridge_list); + + KUNIT_EXPECT_TRUE(test, list_empty(&bridge_list)); + + unregister_test_bridge(ctx_1); +} + +static int fpga_bridge_test_init(struct kunit *test) +{ + test->priv = register_test_bridge(test); + + return 0; +} + +static void fpga_bridge_test_exit(struct kunit *test) +{ + unregister_test_bridge(test->priv); +} + +static struct kunit_case fpga_bridge_test_cases[] = { + KUNIT_CASE(fpga_bridge_test_get), + KUNIT_CASE(fpga_bridge_test_toggle), + KUNIT_CASE(fpga_bridge_test_get_put_list), + {} +}; + +static struct kunit_suite fpga_bridge_suite = { + .name = "fpga_bridge", + .init = fpga_bridge_test_init, + .exit = fpga_bridge_test_exit, + .test_cases = fpga_bridge_test_cases, +}; + +kunit_test_suite(fpga_bridge_suite); + +MODULE_LICENSE("GPL");