From patchwork Thu Oct 12 18:54:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13419635 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 69A2E2AB39 for ; Thu, 12 Oct 2023 18:54:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="B73vk/AI" Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 424A083 for ; Thu, 12 Oct 2023 11:54:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697136891; x=1728672891; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=jD3m7dUC7fN+KYxFKM0m9H0ocrjLWb3YoBEfn1rj+Vc=; b=B73vk/AI2ktGfym2Pm9vzYOe/cpRHu9bn7rEla6M8D5wkfiSis26fkhE 4O/44DWrE2LZqrrkj1vtQ6MiHl2yJsiQ6vqmhXpxIshdyYqSPPY5ljyND QTRx7EQoC9R345uq0bi3zQNDuDeKEhkUfurQATpuBoJErpgMJ46kBfRid lmB8xCfXr32UegFBbjQLD0baMGShlZBGvIjBHy6UxgAQn/WQO+Km9k2kW AzxbdS1qFs4i4aWFNsemJWi0/12tQGgLdOx0MUMEKsIM0d4ookn8G9Y2/ aDsq4oqF+vfuOZTiCveyuJZYjvWcMfHHrC5IR50mR0aqh4MBaUhGd5S8c w==; X-IronPort-AV: E=McAfee;i="6600,9927,10861"; a="388880243" X-IronPort-AV: E=Sophos;i="6.03,219,1694761200"; d="scan'208";a="388880243" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2023 11:54:38 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10861"; a="870711307" X-IronPort-AV: E=Sophos;i="6.03,219,1694761200"; d="scan'208";a="870711307" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.15.16]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2023 11:54:37 -0700 Subject: [PATCH v11 11/22] acpi: numa: Add helper function to retrieve the performance attributes From: Dave Jiang To: linux-cxl@vger.kernel.org Cc: Jonathan Cameron , "Rafael J. Wysocki" , dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, Jonathan.Cameron@huawei.com, dave@stgolabs.net Date: Thu, 12 Oct 2023 11:54:37 -0700 Message-ID: <169713687744.2205276.17806838881616683926.stgit@djiang5-mobl3> In-Reply-To: <169713674328.2205276.10184241477215488339.stgit@djiang5-mobl3> References: <169713674328.2205276.10184241477215488339.stgit@djiang5-mobl3> User-Agent: StGit/1.5 Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Add helper to retrieve the performance attributes based on the device handle. The helper function is exported so the CXL driver can use that to acquire the performance data between the CPU and the CXL host bridge. Reviewed-by: Jonathan Cameron Signed-off-by: Dave Jiang Acked-by: Rafael J. Wysocki --- drivers/acpi/numa/hmat.c | 35 +++++++++++++++++++++++++++++++++++ include/linux/acpi.h | 12 ++++++++++++ 2 files changed, 47 insertions(+) diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c index aabd89c79e26..e3a29ddacbca 100644 --- a/drivers/acpi/numa/hmat.c +++ b/drivers/acpi/numa/hmat.c @@ -107,6 +107,41 @@ static struct memory_target *find_mem_target(unsigned int mem_pxm) return NULL; } +static struct memory_target *acpi_find_genport_target(u8 *device_handle) +{ + struct memory_target *target; + + list_for_each_entry(target, &targets, node) { + if (!memcmp(target->gen_port_device_handle, device_handle, + ACPI_SRAT_DEVICE_HANDLE_SIZE)) + return target; + } + + return NULL; +} + +/** + * acpi_get_genport_coordinates - Retrieve the access coordinates for a generic port + * @device_handle: Device handle string (ACPI or PCI) to match up to the gen port + * @coord: The access coordinates written back out for the generic port + * + * Return: 0 on success. Errno on failure. + */ +int acpi_get_genport_coordinates(u8 *device_handle, + struct access_coordinate *coord) +{ + struct memory_target *target; + + target = acpi_find_genport_target(device_handle); + if (!target) + return -ENOENT; + + *coord = target->coord[NODE_ACCESS_CLASS_GENPORT_SINK]; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(acpi_get_genport_coordinates, CXL); + static __init void alloc_memory_initiator(unsigned int cpu_pxm) { struct memory_initiator *initiator; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 0d334975c0c9..7ffe054befa2 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -16,6 +16,7 @@ #include #include #include +#include struct irq_domain; struct irq_domain_ops; @@ -419,6 +420,17 @@ extern int acpi_blacklisted(void); extern void acpi_osi_setup(char *str); extern bool acpi_osi_is_win8(void); +#ifdef CONFIG_ACPI_HMAT +int acpi_get_genport_coordinates(u8 *device_handle, + struct access_coordinate *coord); +#else +static inline int acpi_get_genport_coordinates(u8 *device_handle, + struct access_coordinate *coord) +{ + return -EOPNOTSUPP; +} +#endif + #ifdef CONFIG_ACPI_NUMA int acpi_map_pxm_to_node(int pxm); int acpi_get_node(acpi_handle handle);