From patchwork Thu Jun 22 21:40:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13289865 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 12AAFEB64DA for ; Thu, 22 Jun 2023 21:40:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231130AbjFVVkH (ORCPT ); Thu, 22 Jun 2023 17:40:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40994 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230262AbjFVVkG (ORCPT ); Thu, 22 Jun 2023 17:40:06 -0400 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FBE21FF1; Thu, 22 Jun 2023 14:40:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687470005; x=1719006005; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VReebXOV4skZQO6tXnZMZWd0m1aKAuLopzyT9MLDleI=; b=S6Et/bucu8RAYdDRjc0nOuSj7DU5pAmv2QfIwQ0p1cjUH6jNqpOo1ler NXnXoeB0/mVP6JlU1ViL0wJWuaglxKSquOyrFXiI4Jhp27czgWfgr4pC5 /VsBAK8weMEbLDqRRoabKGRdQjOvwy8rFXc7DmRS6UoMj5M55xezn7unJ m85nQ4+KgNeXLVrTppTLC67Kniwt2lmhu4/30RLAy48Va0Y2NvVo7lk8p 5vRMTsn60mnz3eEEY0suntysVSNvb5FFsu9++2vFx8MK6/GpvApVwrFyl uM4XlFhmxOGp0q5KfhtzsLP9NR0/S0tZ8Gcx5fl3XMaFwGS/AjjLBjsHf A==; X-IronPort-AV: E=McAfee;i="6600,9927,10749"; a="350383091" X-IronPort-AV: E=Sophos;i="6.01,150,1684825200"; d="scan'208";a="350383091" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2023 14:40:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10749"; a="785080721" X-IronPort-AV: E=Sophos;i="6.01,150,1684825200"; d="scan'208";a="785080721" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.53.238]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2023 14:40:04 -0700 Subject: [PATCH v4 6/6] acpi: numa: Add helper function to retrieve the performance attributes From: Dave Jiang To: linux-acpi@vger.kernel.org, linux-cxl@vger.kernel.org Cc: Jonathan Cameron , rafael@kernel.org, lenb@kernel.org, dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, lukas@wunner.de, Jonathan.Cameron@huawei.com Date: Thu, 22 Jun 2023 14:40:04 -0700 Message-ID: <168747000399.4115467.8583559086999809735.stgit@djiang5-mobl3> In-Reply-To: <168746993412.4115467.1442857478644914777.stgit@djiang5-mobl3> References: <168746993412.4115467.1442857478644914777.stgit@djiang5-mobl3> User-Agent: StGit/1.5 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org 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 --- v4: - Update device_handle to gen_port_device_handle. (Jonathan) v2: - Change strncmp to memcmp. (Jonathan) --- 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 bf3433747495..9f4ac0a39ab6 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; @@ -430,6 +431,17 @@ 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);