From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2F079390C94 for ; Thu, 11 Jun 2026 23:44:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781221466; cv=none; b=OEdYprTB7yJjnT6/UUcCdaE54+5YfygI/EkkU9v/SKIy02fnDi3LK6ItQAt0oc5cIduSWoVMjt9KLxGIrJuQ3IIU+jOJlH8klCyhpfEweIqAAaQdz4byILwQSFKZUskCGDaKqYYjtlnoYtxlIvuBeBEY28356q6FkGlR7VP1pjg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781221466; c=relaxed/simple; bh=1GI55Cb0t5lclXRTsxudgMeQWA4kF5umry+3m2izdV0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ThcaC4DPBYxwE8A8CvGKLxUobZeFgjhBAaryttUpgZz6ncpamCdwFxf8JWI/+R5yjLC0trlTjQv/+qG4R/AuVUH3VoLAdq4hvYklUKB7WIfvbqfItg0HUhvtDSWRvWHdPa2oIC/6xVWQZkLVgH8wLgEZI9zlO6KWyL0+lrhrwVc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B7F71F00A3F; Thu, 11 Jun 2026 23:44:17 +0000 (UTC) From: Dave Jiang To: linux-cxl@vger.kernel.org Cc: djbw@kernel.org, dave@stgolabs.net, jic23@kernel.org, alison.schofield@intel.com, vishal.l.verma@intel.com Subject: [PATCH v5 4/6] cxl/test: Add hierarchy enumeration support for type2 device Date: Thu, 11 Jun 2026 16:44:07 -0700 Message-ID: <20260611234409.256765-5-dave.jiang@intel.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260611234409.256765-1-dave.jiang@intel.com> References: <20260611234409.256765-1-dave.jiang@intel.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add enumeration of type2 device hierarchy in cxl-test. The type2 device is setup to be directly attached to a root port instead of rp -> switch -> device that type3 hierarchy is setup.. Signed-off-by: Dave Jiang --- v5: - Reverse device teardown (sashiko) - Don't put device on platform device add. (sashiko) --- tools/testing/cxl/test/cxl.c | 238 ++++++++++++++++++++++++++++------- 1 file changed, 192 insertions(+), 46 deletions(-) diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c index 71b6203d2fcf..635d26993018 100644 --- a/tools/testing/cxl/test/cxl.c +++ b/tools/testing/cxl/test/cxl.c @@ -28,6 +28,7 @@ static bool type2_test; #define NR_CXL_SWITCH_PORTS 2 #define NR_CXL_PORT_DECODERS 8 #define NR_BRIDGES (NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST + NR_CXL_RCH) +#define NR_CXL_TYPE2_ACCEL 1 #define MOCK_AUTO_REGION_SIZE_DEFAULT SZ_512M static int mock_auto_region_size = MOCK_AUTO_REGION_SIZE_DEFAULT; @@ -1734,19 +1735,93 @@ static void cxl_single_topo_exit(void) } } +static void cxl_type3_mem_exit(void) +{ + struct platform_device *pdev; + int i; + + for (i = ARRAY_SIZE(cxl_rcd) - 1; i >= 0; i--) { + pdev = cxl_rcd[i]; + if (!pdev) + continue; + platform_device_unregister(cxl_rcd[i]); + } + + for (i = ARRAY_SIZE(cxl_mem_single) - 1; i >= 0; i--) { + pdev = cxl_mem_single[i]; + if (!pdev) + continue; + platform_device_unregister(cxl_mem_single[i]); + } + + for (i = ARRAY_SIZE(cxl_mem) - 1; i >= 0; i--) { + pdev = cxl_mem[i]; + if (!pdev) + continue; + platform_device_unregister(pdev); + } +} + +static void cxl_type2_mem_exit(void) +{ + for (int i = NR_CXL_TYPE2_ACCEL - 1; i >= 0; i--) { + struct platform_device *pdev = cxl_mem[i]; + + if (!pdev) + continue; + platform_device_unregister(pdev); + } +} + static void cxl_mem_exit(void) { - int i; - - for (i = ARRAY_SIZE(cxl_rcd) - 1; i >= 0; i--) - platform_device_unregister(cxl_rcd[i]); - for (i = ARRAY_SIZE(cxl_mem_single) - 1; i >= 0; i--) - platform_device_unregister(cxl_mem_single[i]); - for (i = ARRAY_SIZE(cxl_mem) - 1; i >= 0; i--) - platform_device_unregister(cxl_mem[i]); + if (type2_test) { + cxl_type2_mem_exit(); + return; + } + + cxl_type3_mem_exit(); +} + +static int cxl_type2_mem_init(void) +{ + int i, rc; + + for (i = 0; i < NR_CXL_TYPE2_ACCEL; i++) { + struct platform_device *dport = cxl_root_port[i]; + struct platform_device *pdev; + + pdev = platform_device_alloc("cxl_type2_accel", i); + if (!pdev) { + rc = -ENOMEM; + goto err_mem; + } + pdev->dev.parent = &dport->dev; + set_dev_node(&pdev->dev, i % 2); + + rc = platform_device_add(pdev); + if (rc) { + rc = -ENOMEM; + platform_device_put(pdev); + goto err_mem; + } + cxl_mem[i] = pdev; + } + + return 0; + +err_mem: + for (i = NR_CXL_TYPE2_ACCEL - 1; i >= 0; i--) { + struct platform_device *pdev = cxl_mem[i]; + + if (!pdev) + continue; + platform_device_unregister(pdev); + } + return rc; } -static int cxl_mem_init(void) +static int cxl_type3_mem_init(void) { int i, rc; @@ -1755,8 +1830,10 @@ static int cxl_mem_init(void) struct platform_device *pdev; pdev = platform_device_alloc("cxl_mem", i); - if (!pdev) + if (!pdev) { + rc = -ENOMEM; goto err_mem; + } pdev->dev.parent = &dport->dev; set_dev_node(&pdev->dev, i % 2); @@ -1770,8 +1847,10 @@ static int cxl_mem_init(void) struct platform_device *pdev; pdev = platform_device_alloc("cxl_mem", NR_MEM_MULTI + i); - if (!pdev) + if (!pdev) { + rc = -ENOMEM; goto err_single; + } pdev->dev.parent = &dport->dev; set_dev_node(&pdev->dev, i % 2); @@ -1786,8 +1865,10 @@ static int cxl_mem_init(void) struct platform_device *pdev; pdev = platform_device_alloc("cxl_rcd", idx); - if (!pdev) + if (!pdev) { + rc = -ENOMEM; goto err_rcd; + } pdev->dev.parent = &rch->dev; set_dev_node(&pdev->dev, i % 2); @@ -1810,6 +1891,13 @@ static int cxl_mem_init(void) return rc; } +static int cxl_mem_init(void) +{ + if (type2_test) + return cxl_type2_mem_init(); + return cxl_type3_mem_init(); +} + static ssize_t decoder_reset_preserve_registry_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -2049,6 +2137,92 @@ static int cxl_switches_populate(void) return 0; } +static void cxl_type2_topo_exit(void) +{ + cxl_rootports_remove(); + host_bridges_remove(); +} + +static int cxl_type2_topo_init(void) +{ + int rc; + + rc = host_bridges_populate(); + if (rc) + return rc; + + rc = cxl_rootports_populate(); + if (rc) { + host_bridges_remove(); + return rc; + } + + return 0; +} + +static void cxl_type3_topo_exit(void) +{ + cxl_rch_topo_exit(); + cxl_single_topo_exit(); + cxl_switches_remove(); + cxl_rootports_remove(); + host_bridges_remove(); +} + +static int cxl_type3_topo_init(void) +{ + int rc; + + rc = host_bridges_populate(); + if (rc) + return rc; + + rc = cxl_rootports_populate(); + if (rc) + goto err_host_bridges; + + rc = cxl_switches_populate(); + if (rc) + goto err_root_ports; + + rc = cxl_single_topo_init(); + if (rc) + goto err_switches; + + rc = cxl_rch_topo_init(); + if (rc) + goto err_single; + + return 0; + +err_single: + cxl_single_topo_exit(); +err_switches: + cxl_switches_remove(); +err_root_ports: + cxl_rootports_remove(); +err_host_bridges: + host_bridges_remove(); + return rc; +} + +static void cxl_topo_exit(void) +{ + if (type2_test) { + cxl_type2_topo_exit(); + return; + } + + cxl_type3_topo_exit(); +} + +static int cxl_topo_init(void) +{ + if (type2_test) + return cxl_type2_topo_init(); + return cxl_type3_topo_init(); +} + static __init int cxl_test_init(void) { struct range mappable; @@ -2092,29 +2266,13 @@ static __init int cxl_test_init(void) if (rc) goto err_populate; - rc = host_bridges_populate(); + rc = cxl_topo_init(); if (rc) goto err_populate; - rc = cxl_rootports_populate(); - if (rc) - goto err_host_bridges; - - rc = cxl_switches_populate(); - if (rc) - goto err_root_ports; - - rc = cxl_single_topo_init(); - if (rc) - goto err_switches; - - rc = cxl_rch_topo_init(); - if (rc) - goto err_single; - cxl_acpi = platform_device_alloc("cxl_acpi", 0); if (!cxl_acpi) - goto err_rch; + goto err_topo; mock_companion(&acpi0017_mock, &cxl_acpi->dev); acpi0017_mock.dev.bus = &platform_bus_type; @@ -2122,7 +2280,7 @@ static __init int cxl_test_init(void) rc = cxl_mock_platform_device_add(cxl_acpi, NULL); if (rc) - goto err_rch; + goto err_topo; rc = cxl_mem_init(); if (rc) @@ -2138,16 +2296,8 @@ static __init int cxl_test_init(void) cxl_mem_exit(); err_root: platform_device_put(cxl_acpi); -err_rch: - cxl_rch_topo_exit(); -err_single: - cxl_single_topo_exit(); -err_switches: - cxl_switches_remove(); -err_root_ports: - cxl_rootports_remove(); -err_host_bridges: - host_bridges_remove(); +err_topo: + cxl_topo_exit(); err_populate: depopulate_all_mock_resources(); err_gen_pool_add: @@ -2173,11 +2323,7 @@ static __exit void cxl_test_exit(void) hmem_test_exit(); cxl_mem_exit(); platform_device_unregister(cxl_acpi); - cxl_rch_topo_exit(); - cxl_single_topo_exit(); - cxl_switches_remove(); - cxl_rootports_remove(); - host_bridges_remove(); + cxl_topo_exit(); depopulate_all_mock_resources(); gen_pool_destroy(cxl_mock_pool); unregister_cxl_mock_ops(&cxl_mock_ops); -- 2.54.0