From patchwork Mon Jan 24 00:32:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 12721251 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) (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 CB0CC2C80 for ; Mon, 24 Jan 2022 00:32:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1642984322; x=1674520322; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=kp9uk5c4GYS1zV8Q6+FmnuOJN0Vv5kVNinHqiy3TRc0=; b=G6GonUeEg0vJNNrT4upL/RH+8i7VC3BskUVoK4eSVNEnSp4PpoOyTK5l e9OtNORhsHFB04LXRKygp8tBZKQCmQdm9EJ3ykCBPML52S/OLTgVMnwTJ QPTd0YIWBhaQVlvJQRHLjcuhv9IOxsevRoUeYys6G7HHzdByyz8gULWti 62ZAt1UZHLDNn0U1nYTtl6owAQ43rNktusHhkwjFe6glEuFQSrblXTaSR 5UJf9ZSjIys8V6kuMySGpltCnDH92PZreYaNwkf6T3qyAlYhJPs1l3MjN vzq9urux+8WC12HPfFlLszYZxzVQqrdtQzhQeaTo6MCi3xeDJxZEkOTCj g==; X-IronPort-AV: E=McAfee;i="6200,9189,10236"; a="270368600" X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="270368600" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Jan 2022 16:32:02 -0800 X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="534000340" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.25]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Jan 2022 16:32:01 -0800 Subject: [PATCH v3 38/40] tools/testing/cxl: Mock one level of switches From: Dan Williams To: linux-cxl@vger.kernel.org Cc: linux-pci@vger.kernel.org, nvdimm@lists.linux.dev Date: Sun, 23 Jan 2022 16:32:01 -0800 Message-ID: <164298432189.3018233.13142151550113000967.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <164298411792.3018233.7493009997525360044.stgit@dwillia2-desk3.amr.corp.intel.com> References: <164298411792.3018233.7493009997525360044.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.18-3-g996c Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The CXL port enumeration process adds intermediate CXL ports that are discovered between "root" CXL ports enumerated by 'cxl_acpi' and endpoints enumerated by 'cxl_pci + cxl_mem'. Test the dynamic discovery of intermediate switch ports in a CXL topology. Signed-off-by: Dan Williams --- tools/testing/cxl/test/cxl.c | 138 ++++++++++++++++++++++++++++++------------ 1 file changed, 97 insertions(+), 41 deletions(-) diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c index 7e4a0b1ee436..ea88fabc3198 100644 --- a/tools/testing/cxl/test/cxl.c +++ b/tools/testing/cxl/test/cxl.c @@ -11,14 +11,21 @@ #include #include "mock.h" -#define NR_CXL_HOST_BRIDGES 4 +#define NR_CXL_HOST_BRIDGES 2 #define NR_CXL_ROOT_PORTS 2 +#define NR_CXL_SWITCH_PORTS 2 static struct platform_device *cxl_acpi; static struct platform_device *cxl_host_bridge[NR_CXL_HOST_BRIDGES]; static struct platform_device *cxl_root_port[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS]; -struct platform_device *cxl_mem[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS]; +static struct platform_device + *cxl_switch_uport[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS]; +static struct platform_device + *cxl_switch_dport[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS * + NR_CXL_SWITCH_PORTS]; +struct platform_device + *cxl_mem[NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS * NR_CXL_SWITCH_PORTS]; static struct acpi_device acpi0017_mock; static struct acpi_device host_bridge[NR_CXL_HOST_BRIDGES] = { @@ -28,12 +35,6 @@ static struct acpi_device host_bridge[NR_CXL_HOST_BRIDGES] = { [1] = { .handle = &host_bridge[1], }, - [2] = { - .handle = &host_bridge[2], - }, - [3] = { - .handle = &host_bridge[3], - }, }; static bool is_mock_dev(struct device *dev) @@ -71,7 +72,7 @@ static struct { } cfmws0; struct { struct acpi_cedt_cfmws cfmws; - u32 target[4]; + u32 target[2]; } cfmws1; struct { struct acpi_cedt_cfmws cfmws; @@ -79,7 +80,7 @@ static struct { } cfmws2; struct { struct acpi_cedt_cfmws cfmws; - u32 target[4]; + u32 target[2]; } cfmws3; } __packed mock_cedt = { .cedt = { @@ -105,22 +106,6 @@ static struct { .uid = 1, .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20, }, - .chbs[2] = { - .header = { - .type = ACPI_CEDT_TYPE_CHBS, - .length = sizeof(mock_cedt.chbs[0]), - }, - .uid = 2, - .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20, - }, - .chbs[3] = { - .header = { - .type = ACPI_CEDT_TYPE_CHBS, - .length = sizeof(mock_cedt.chbs[0]), - }, - .uid = 3, - .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20, - }, .cfmws0 = { .cfmws = { .header = { @@ -142,14 +127,14 @@ static struct { .type = ACPI_CEDT_TYPE_CFMWS, .length = sizeof(mock_cedt.cfmws1), }, - .interleave_ways = 2, + .interleave_ways = 1, .granularity = 4, .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 | ACPI_CEDT_CFMWS_RESTRICT_VOLATILE, .qtg_id = 1, - .window_size = SZ_256M * 4, + .window_size = SZ_256M * 2, }, - .target = { 0, 1, 2, 3 }, + .target = { 0, 1, }, }, .cfmws2 = { .cfmws = { @@ -172,14 +157,14 @@ static struct { .type = ACPI_CEDT_TYPE_CFMWS, .length = sizeof(mock_cedt.cfmws3), }, - .interleave_ways = 2, + .interleave_ways = 1, .granularity = 4, .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 | ACPI_CEDT_CFMWS_RESTRICT_PMEM, .qtg_id = 3, - .window_size = SZ_256M * 4, + .window_size = SZ_256M * 2, }, - .target = { 0, 1, 2, 3 }, + .target = { 0, 1, }, }, }; @@ -332,6 +317,17 @@ static bool is_mock_port(struct device *dev) if (dev == &cxl_root_port[i]->dev) return true; + for (i = 0; i < ARRAY_SIZE(cxl_switch_uport); i++) + if (dev == &cxl_switch_uport[i]->dev) + return true; + + for (i = 0; i < ARRAY_SIZE(cxl_switch_dport); i++) + if (dev == &cxl_switch_dport[i]->dev) + return true; + + if (is_cxl_memdev(dev)) + return is_mock_dev(dev->parent); + return false; } @@ -372,12 +368,6 @@ static struct acpi_pci_root mock_pci_root[NR_CXL_HOST_BRIDGES] = { [1] = { .bus = &mock_pci_bus[1], }, - [2] = { - .bus = &mock_pci_bus[2], - }, - [3] = { - .bus = &mock_pci_bus[3], - }, }; static bool is_mock_bus(struct pci_bus *bus) @@ -446,6 +436,26 @@ static int mock_cxl_port_enumerate_dports(struct cxl_port *port) dev_name(&pdev->dev)); } + for (i = 0; i < ARRAY_SIZE(cxl_switch_dport); i++) { + struct platform_device *pdev = cxl_switch_dport[i]; + struct cxl_dport *dport; + + if (pdev->dev.parent != port->uport) + continue; + + dport = devm_cxl_add_dport(port, &pdev->dev, pdev->id, + CXL_RESOURCE_NONE); + + if (IS_ERR(dport)) { + dev_err(dev, "failed to add dport: %s (%ld)\n", + dev_name(&pdev->dev), PTR_ERR(dport)); + return PTR_ERR(dport); + } + + dev_dbg(dev, "add dport%d: %s\n", pdev->id, + dev_name(&pdev->dev)); + } + return 0; } @@ -574,15 +584,51 @@ static __init int cxl_test_init(void) cxl_root_port[i] = pdev; } - BUILD_BUG_ON(ARRAY_SIZE(cxl_mem) != ARRAY_SIZE(cxl_root_port)); + BUILD_BUG_ON(ARRAY_SIZE(cxl_switch_uport) != ARRAY_SIZE(cxl_root_port)); + for (i = 0; i < ARRAY_SIZE(cxl_switch_uport); i++) { + struct platform_device *root_port = cxl_root_port[i]; + struct platform_device *pdev; + + pdev = platform_device_alloc("cxl_switch_uport", i); + if (!pdev) + goto err_port; + pdev->dev.parent = &root_port->dev; + + rc = platform_device_add(pdev); + if (rc) { + platform_device_put(pdev); + goto err_uport; + } + cxl_switch_uport[i] = pdev; + } + + for (i = 0; i < ARRAY_SIZE(cxl_switch_dport); i++) { + struct platform_device *uport = + cxl_switch_uport[i % ARRAY_SIZE(cxl_switch_uport)]; + struct platform_device *pdev; + + pdev = platform_device_alloc("cxl_switch_dport", i); + if (!pdev) + goto err_port; + pdev->dev.parent = &uport->dev; + + rc = platform_device_add(pdev); + if (rc) { + platform_device_put(pdev); + goto err_dport; + } + cxl_switch_dport[i] = pdev; + } + + BUILD_BUG_ON(ARRAY_SIZE(cxl_mem) != ARRAY_SIZE(cxl_switch_dport)); for (i = 0; i < ARRAY_SIZE(cxl_mem); i++) { - struct platform_device *port = cxl_root_port[i]; + struct platform_device *dport = cxl_switch_dport[i]; struct platform_device *pdev; pdev = alloc_memdev(i); if (!pdev) goto err_mem; - pdev->dev.parent = &port->dev; + pdev->dev.parent = &dport->dev; set_dev_node(&pdev->dev, i % 2); rc = platform_device_add(pdev); @@ -611,6 +657,12 @@ static __init int cxl_test_init(void) err_mem: for (i = ARRAY_SIZE(cxl_mem) - 1; i >= 0; i--) platform_device_unregister(cxl_mem[i]); +err_dport: + for (i = ARRAY_SIZE(cxl_switch_dport) - 1; i >= 0; i--) + platform_device_unregister(cxl_switch_dport[i]); +err_uport: + for (i = ARRAY_SIZE(cxl_switch_uport) - 1; i >= 0; i--) + platform_device_unregister(cxl_switch_uport[i]); err_port: for (i = ARRAY_SIZE(cxl_root_port) - 1; i >= 0; i--) platform_device_unregister(cxl_root_port[i]); @@ -633,6 +685,10 @@ static __exit void cxl_test_exit(void) platform_device_unregister(cxl_acpi); for (i = ARRAY_SIZE(cxl_mem) - 1; i >= 0; i--) platform_device_unregister(cxl_mem[i]); + for (i = ARRAY_SIZE(cxl_switch_dport) - 1; i >= 0; i--) + platform_device_unregister(cxl_switch_dport[i]); + for (i = ARRAY_SIZE(cxl_switch_uport) - 1; i >= 0; i--) + platform_device_unregister(cxl_switch_uport[i]); for (i = ARRAY_SIZE(cxl_root_port) - 1; i >= 0; i--) platform_device_unregister(cxl_root_port[i]); for (i = ARRAY_SIZE(cxl_host_bridge) - 1; i >= 0; i--)