From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 9964445665; Sat, 20 Jul 2024 18:51:33 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 55CD140656; Sat, 20 Jul 2024 18:51:10 +0200 (CEST) Received: from NAM12-BN8-obe.outbound.protection.outlook.com (mail-bn8nam12on2052.outbound.protection.outlook.com [40.107.237.52]) by mails.dpdk.org (Postfix) with ESMTP id CBF2340A7A for ; Sat, 20 Jul 2024 18:51:08 +0200 (CEST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=o1IXzc7Nm7MDxSCDfmKv2tmIG7QoWwyQnY9Ec4EEi8XMJx4/zIkgI0JycPHn1CNjTuwW5V4vJOE9BBwjHXWnl5HbprIFn+cc0Vx+Aw8H5uRz2K9QFBpcnSdPRk+MhWLjchaMeHrPYHg+bzTbUXpgGHTjDjRJEbrxTpxo0qPI8KhkmFxnUaHN4xUIg4F/PTKMCOzM79k5yd3xiiMbMBLt4jiNi3OvCnmWo34LISf9Ng3xJJX0fnR0emut8KAiiQbh1AUzYpd74s9UUT49hWbIXA/hB/o5zYfQAuGL9IEHgMTZkfC76XRa1kRCCjPmBCAcP7ijnuN6jEMxaNNgdP5YSQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=dQ+ntb2krZ2WjQOnmg5A8H8ymMd9iZihCBBwVvrcxbo=; b=KIkykm2Ie3iVLdXie9ryKPPyRaJqOsbdmIRkDXeA8taw7T/AfvmXlrAcwXFYB4Y+ihE3QsGdjL0KiXvPZpedjyje/qrDGVZL/IqGBE7NW4oFynh3sBZ+KOMqXByeQdr3yMPXodbWuykvZcs1AMaRm0r/tJ+hHzIopRf0ZDUS7YYw4/IZBTZH60pBwTD3TUm10r0OdjN5+fKVh+AlAt2T8VAjEKRMTCdeAwj1bvzNXjlz9rj7vzKKbEmbQc/ZfpCLz/+q4caqKZWDKZrzheJ2XsGPhXpllYFKRWagDjNRa87eU0/QZ1Grs97FPXd2YDfXnWmNUafTgEWpbP2SkD9whw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=intel.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=dQ+ntb2krZ2WjQOnmg5A8H8ymMd9iZihCBBwVvrcxbo=; b=Lw8G9R+j3qOJ8G36spui5NTmQF5CuoBpA3DzKHe6RDOXYsgtPx9cdE9PMGyX+wl2tjvw6rkuw+qWeC+OiNfoU+lNFKXPck5OxiNq27+yXWNqUWgwj6sHi5bqGVQYoXkyJOANVdI6F1dBwDSu7vWHUGRMkU5JSevysFhti5r9kno= Received: from BL1P221CA0025.NAMP221.PROD.OUTLOOK.COM (2603:10b6:208:2c5::13) by CH2PR12MB4232.namprd12.prod.outlook.com (2603:10b6:610:a4::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7784.19; Sat, 20 Jul 2024 16:51:06 +0000 Received: from BL6PEPF0001AB58.namprd02.prod.outlook.com (2603:10b6:208:2c5:cafe::fa) by BL1P221CA0025.outlook.office365.com (2603:10b6:208:2c5::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7784.15 via Frontend Transport; Sat, 20 Jul 2024 16:51:06 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by BL6PEPF0001AB58.mail.protection.outlook.com (10.167.241.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7784.11 via Frontend Transport; Sat, 20 Jul 2024 16:51:05 +0000 Received: from jfw9ny3-os.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Sat, 20 Jul 2024 11:51:03 -0500 From: Sivaprasad Tummala To: , , , , , , CC: Subject: [PATCH v1 4/4] power/amd_uncore: uncore power management support for AMD EPYC processors Date: Sat, 20 Jul 2024 16:50:29 +0000 Message-ID: <20240720165030.246294-5-sivaprasad.tummala@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240720165030.246294-1-sivaprasad.tummala@amd.com> References: <20240220153326.6236-1-sivaprasad.tummala@amd.com> <20240720165030.246294-1-sivaprasad.tummala@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF0001AB58:EE_|CH2PR12MB4232:EE_ X-MS-Office365-Filtering-Correlation-Id: 2c7780da-ca55-44a3-4686-08dca8dc25cb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|1800799024|376014|82310400026|36860700013; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Q1cfUcFRVJwVReedaZfzsr6TVSt5ln1HmbETsE9JtQmlg95SHRHn827qqYIj?= =?us-ascii?Q?FCsK7dgDkHeLAuG8Oh4QRGEw+LU7+Ckqq7fuoBL/d2pYqfk9AuZDS2KKZJgO?= =?us-ascii?Q?y2JbFXC+BspVvuG9spOOr4vT17J61P1QYomOR/nKyJw6qgo1J85JCLoUl0uQ?= =?us-ascii?Q?tzb8aUFCwamluS2usrr/KksyN1f4rTwYeJNi5oW2Vsb6tKWI9Xfil56Tbb03?= =?us-ascii?Q?dCE222QPIjQB4qZxfHjx5vAziTTGmu8cB/RfPeLW9ECJndrrw5lqgyXPlpL0?= =?us-ascii?Q?selkX895hNVchq1JQtSo4EWTJqPJP+ANTcmg6f3R65VxwIYz8arrRY81Ias+?= =?us-ascii?Q?gybPDZNppDbwZ8NlsU76G4IylJDFMCue9kSkDRYXPPd2Sctf2PXaWlsgNYQR?= =?us-ascii?Q?geqaN6U4dyqJuxusXUX1FhJ8RwcMxqGDGhcVM6M3KMp1MPym5/jWePonK4of?= =?us-ascii?Q?0TqtPfyIzF1v1lQqAH6l0okG/V5nfoWQg7X4kp4eK2R6Yo8BJs2jRcEtqtHR?= =?us-ascii?Q?l6PxeEBnT4Q+x613JzQvSzM4uHd8wUARBSyHFzWPXljwianQ1u9pdZy3ElCc?= =?us-ascii?Q?KXe7zs2bOaCKxn+6m7aEnSBycKqxjOVTBorTgzEkHQQalELvRs0MnrvNpI2S?= =?us-ascii?Q?ZPD+kDXQIJoLPhGwfv5V8IrK2mBXkby/LhhDTF4xaW/owQJPy+W2YC7t8ffW?= =?us-ascii?Q?2playU9BXchns87WV/3jrZSBy18kbEtnqMDTviN5LVTPl8eLWFHGfVH7BbtS?= =?us-ascii?Q?K9gaPYHKuR4XKGfX+Ncw4THyZA5FOfUi/AjCZzPgiZ76/UhJeaec7eVYiXpv?= =?us-ascii?Q?P3NvPXGrpNiruaruuDwnWbYYA/Tzk8B2EjH3R/F8ea6kRMGVIjYnuhAFBNjz?= =?us-ascii?Q?yIjpmeYoECZOzNf8mjgpD6nGP9znyFYacC2NUJi1/X/w9rV2NwIvqEexvbqr?= =?us-ascii?Q?66ximUz/ef3LoTJ/4LJaqnlBJns/U2ANwjeyaoaVu2ugleC9+JJV1BanLx3X?= =?us-ascii?Q?MlgPa0UFRGaoCsZsXPk/kEyY4lEoRKLFNYJ5SrTFRMp5km23OGoQUwZb3WtY?= =?us-ascii?Q?6cYtPOgmhHA4b07QWnmr9udciRT8NBmYyvKYQFFLWvYB70ggECM3uw4385jT?= =?us-ascii?Q?I9WzXFDbTrVT+YrvnedtjnUAIhVkVOlsXcz495b3gvUwwfR8Uv58ZK/KWyDz?= =?us-ascii?Q?ITGBC4E6ly+pVV+6BV9KiwvmiVoTM7/oQQMm71EqOBvPGqW5UIszfIiHqy9H?= =?us-ascii?Q?pM9HKpORARqJwqBcnUlVwdgx80x1WmD0RdpFkGSC5jrlQ0EqgYWyKvF4WHg0?= =?us-ascii?Q?fbmhqkGU2OkTWWAlSiBSxQtafoDe7+u88bZiIqKFF+wMDRfMUtXuxhUqvZ+L?= =?us-ascii?Q?ScNhOmMSQRfEo9Vq+Rj1sTs706d1DsWKO/krgLELpKVF1YmnkGAgb3WaXJxn?= =?us-ascii?Q?//bRg2KtPbxUo7GBurgJn6Q7RQht8DIn?= X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230040)(1800799024)(376014)(82310400026)(36860700013); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jul 2024 16:51:05.9493 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2c7780da-ca55-44a3-4686-08dca8dc25cb X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF0001AB58.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4232 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org This patch introduces driver support for power management of uncore components in AMD EPYC processors. Signed-off-by: Sivaprasad Tummala --- drivers/power/amd_uncore/amd_uncore.c | 321 ++++++++++++++++++++++++++ drivers/power/amd_uncore/amd_uncore.h | 226 ++++++++++++++++++ drivers/power/amd_uncore/meson.build | 20 ++ drivers/power/meson.build | 1 + 4 files changed, 568 insertions(+) create mode 100644 drivers/power/amd_uncore/amd_uncore.c create mode 100644 drivers/power/amd_uncore/amd_uncore.h create mode 100644 drivers/power/amd_uncore/meson.build diff --git a/drivers/power/amd_uncore/amd_uncore.c b/drivers/power/amd_uncore/amd_uncore.c new file mode 100644 index 0000000000..f15eaaa307 --- /dev/null +++ b/drivers/power/amd_uncore/amd_uncore.c @@ -0,0 +1,321 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2024 Advanced Micro Devices, Inc. + */ + +#include +#include +#include + +#include + +#include "amd_uncore.h" +#include "power_common.h" +#include "e_smi/e_smi.h" + +#define MAX_UNCORE_FREQS 8 +#define MAX_NUMA_DIE 8 + +#define BUS_FREQ 1000 + +struct __rte_cache_aligned uncore_power_info { + unsigned int die; /* Core die id */ + unsigned int pkg; /* Package id */ + uint32_t freqs[MAX_UNCORE_FREQS]; /* Frequency array */ + uint32_t nb_freqs; /* Number of available freqs */ + uint32_t curr_idx; /* Freq index in freqs array */ + uint32_t max_freq; /* System max uncore freq */ + uint32_t min_freq; /* System min uncore freq */ +}; + +static struct uncore_power_info uncore_info[RTE_MAX_NUMA_NODES][MAX_NUMA_DIE]; +static int esmi_initialized; + +static int +set_uncore_freq_internal(struct uncore_power_info *ui, uint32_t idx) +{ + int ret; + + if (idx >= MAX_UNCORE_FREQS || idx >= ui->nb_freqs) { + POWER_LOG(DEBUG, "Invalid uncore frequency index %u, which " + "should be less than %u", idx, ui->nb_freqs); + return -1; + } + + ret = esmi_apb_disable(ui->pkg, idx); + if (ret != ESMI_SUCCESS) { + POWER_LOG(ERR, "DF P-state '%u' set failed for pkg %02u", + idx, ui->pkg); + return -1; + } + + POWER_DEBUG_LOG("DF P-state '%u' to be set for pkg %02u die %02u", + idx, ui->pkg, ui->die); + + /* write the minimum value first if the target freq is less than current max */ + ui->curr_idx = idx; + + return 0; +} + +/* + * Fopen the sys file for the future setting of the uncore die frequency. + */ +static int +power_init_for_setting_uncore_freq(struct uncore_power_info *ui) +{ + /* open and read all uncore sys files */ + /* Base max */ + ui->max_freq = 1800000; + ui->min_freq = 1200000; + + return 0; +} + +/* + * Get the available uncore frequencies of the specific die by reading the + * sys file. + */ +static int +power_get_available_uncore_freqs(struct uncore_power_info *ui) +{ + int ret = -1; + uint32_t i, num_uncore_freqs = 3; + uint32_t fabric_freqs[] = { + /* to be extended for probing support in future */ + 1800, + 1444, + 1200 + }; + + if (num_uncore_freqs >= MAX_UNCORE_FREQS) { + POWER_LOG(ERR, "Too many available uncore frequencies: %d", + num_uncore_freqs); + goto out; + } + + /* Generate the uncore freq bucket array. */ + for (i = 0; i < num_uncore_freqs; i++) + ui->freqs[i] = fabric_freqs[i] * BUS_FREQ; + + ui->nb_freqs = num_uncore_freqs; + + ret = 0; + + POWER_DEBUG_LOG("%d frequency(s) of pkg %02u die %02u are available", + num_uncore_freqs, ui->pkg, ui->die); + +out: + return ret; +} + +static int +check_pkg_die_values(unsigned int pkg, unsigned int die) +{ + unsigned int max_pkgs, max_dies; + max_pkgs = power_amd_uncore_get_num_pkgs(); + if (max_pkgs == 0) + return -1; + if (pkg >= max_pkgs) { + POWER_LOG(DEBUG, "Package number %02u can not exceed %u", + pkg, max_pkgs); + return -1; + } + + max_dies = power_amd_uncore_get_num_dies(pkg); + if (max_dies == 0) + return -1; + if (die >= max_dies) { + POWER_LOG(DEBUG, "Die number %02u can not exceed %u", + die, max_dies); + return -1; + } + + return 0; +} + +static void +power_amd_uncore_esmi_init(void) +{ + if (esmi_init() == ESMI_SUCCESS) + esmi_initialized = 1; +} + +int +power_amd_uncore_init(unsigned int pkg, unsigned int die) +{ + struct uncore_power_info *ui; + int ret; + + if (!esmi_initialized) { + ret = esmi_init(); + if (ret != ESMI_SUCCESS) { + POWER_LOG(DEBUG, "ESMI Not initialized, drivers not found"); + return -1; + } + } + + ret = check_pkg_die_values(pkg, die); + if (ret < 0) + return -1; + + ui = &uncore_info[pkg][die]; + ui->die = die; + ui->pkg = pkg; + + /* Init for setting uncore die frequency */ + if (power_init_for_setting_uncore_freq(ui) < 0) { + POWER_LOG(DEBUG, "Cannot init for setting uncore frequency for " + "pkg %02u die %02u", pkg, die); + return -1; + } + + /* Get the available frequencies */ + if (power_get_available_uncore_freqs(ui) < 0) { + POWER_LOG(DEBUG, "Cannot get available uncore frequencies of " + "pkg %02u die %02u", pkg, die); + return -1; + } + + return 0; +} + +int +power_amd_uncore_exit(unsigned int pkg, unsigned int die) +{ + struct uncore_power_info *ui; + + int ret = check_pkg_die_values(pkg, die); + if (ret < 0) + return -1; + + ui = &uncore_info[pkg][die]; + ui->nb_freqs = 0; + + if (esmi_initialized) { + esmi_exit(); + esmi_initialized = 0; + } + + return 0; +} + +uint32_t +power_get_amd_uncore_freq(unsigned int pkg, unsigned int die) +{ + int ret = check_pkg_die_values(pkg, die); + if (ret < 0) + return -1; + + return uncore_info[pkg][die].curr_idx; +} + +int +power_set_amd_uncore_freq(unsigned int pkg, unsigned int die, uint32_t index) +{ + int ret = check_pkg_die_values(pkg, die); + if (ret < 0) + return -1; + + return set_uncore_freq_internal(&(uncore_info[pkg][die]), index); +} + +int +power_amd_uncore_freq_max(unsigned int pkg, unsigned int die) +{ + int ret = check_pkg_die_values(pkg, die); + if (ret < 0) + return -1; + + return set_uncore_freq_internal(&(uncore_info[pkg][die]), 0); +} + + +int +power_amd_uncore_freq_min(unsigned int pkg, unsigned int die) +{ + int ret = check_pkg_die_values(pkg, die); + if (ret < 0) + return -1; + + struct uncore_power_info *ui = &uncore_info[pkg][die]; + + return set_uncore_freq_internal(&(uncore_info[pkg][die]), ui->nb_freqs - 1); +} + +int +power_amd_uncore_freqs(unsigned int pkg, unsigned int die, uint32_t *freqs, uint32_t num) +{ + struct uncore_power_info *ui; + + int ret = check_pkg_die_values(pkg, die); + if (ret < 0) + return -1; + + if (freqs == NULL) { + POWER_LOG(ERR, "NULL buffer supplied"); + return 0; + } + + ui = &uncore_info[pkg][die]; + if (num < ui->nb_freqs) { + POWER_LOG(ERR, "Buffer size is not enough"); + return 0; + } + rte_memcpy(freqs, ui->freqs, ui->nb_freqs * sizeof(uint32_t)); + + return ui->nb_freqs; +} + +int +power_amd_uncore_get_num_freqs(unsigned int pkg, unsigned int die) +{ + int ret = check_pkg_die_values(pkg, die); + if (ret < 0) + return -1; + + return uncore_info[pkg][die].nb_freqs; +} + +unsigned int +power_amd_uncore_get_num_pkgs(void) +{ + uint32_t num_pkgs = 0; + int ret; + + if (esmi_initialized) { + ret = esmi_number_of_sockets_get(&num_pkgs); + if (ret != ESMI_SUCCESS) { + POWER_LOG(ERR, "Failed to get number of sockets"); + num_pkgs = 0; + } + } + return num_pkgs; +} + +unsigned int +power_amd_uncore_get_num_dies(unsigned int pkg) +{ + if (pkg >= power_amd_uncore_get_num_pkgs()) { + POWER_LOG(ERR, "Invalid package ID"); + return 0; + } + + return 1; +} + +static struct rte_power_uncore_ops amd_uncore_ops = { + .name = "amd-hsmp", + .cb = power_amd_uncore_esmi_init, + .init = power_amd_uncore_init, + .exit = power_amd_uncore_exit, + .get_avail_freqs = power_amd_uncore_freqs, + .get_num_pkgs = power_amd_uncore_get_num_pkgs, + .get_num_dies = power_amd_uncore_get_num_dies, + .get_num_freqs = power_amd_uncore_get_num_freqs, + .get_freq = power_get_amd_uncore_freq, + .set_freq = power_set_amd_uncore_freq, + .freq_max = power_amd_uncore_freq_max, + .freq_min = power_amd_uncore_freq_min, +}; + +RTE_POWER_REGISTER_UNCORE_OPS(amd_uncore_ops); diff --git a/drivers/power/amd_uncore/amd_uncore.h b/drivers/power/amd_uncore/amd_uncore.h new file mode 100644 index 0000000000..60e0e64d27 --- /dev/null +++ b/drivers/power/amd_uncore/amd_uncore.h @@ -0,0 +1,226 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2024 Advanced Micro Devices, Inc. + */ + +#ifndef POWER_AMD_UNCORE_H +#define POWER_AMD_UNCORE_H + +/** + * @file + * RTE AMD Uncore Frequency Management + */ + +#include "rte_power.h" +#include "rte_power_uncore.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * Initialize uncore frequency management for specific die on a package. + * It will get the available frequencies and prepare to set new die frequencies. + * + * This function should NOT be called in the fast path. + * + * @param pkg + * Package number. + * Each physical CPU in a system is referred to as a package. + * @param die + * Die number. + * Each package can have several dies connected together via the uncore mesh. + * + * @return + * - 0 on success. + * - Negative on error. + */ +int +power_amd_uncore_init(unsigned int pkg, unsigned int die); + +/** + * Exit uncore frequency management on a specific die on a package. + * It will restore uncore min and* max values to previous values + * before initialization of API. + * + * This function should NOT be called in the fast path. + * + * @param pkg + * Package number. + * Each physical CPU in a system is referred to as a package. + * @param die + * Die number. + * Each package can have several dies connected together via the uncore mesh. + * + * @return + * - 0 on success. + * - Negative on error. + */ +int +power_amd_uncore_exit(unsigned int pkg, unsigned int die); + +/** + * Return the current index of available frequencies of a specific die on a package. + * It should be protected outside of this function for threadsafe. + * + * This function should NOT be called in the fast path. + * + * @param pkg + * Package number. + * Each physical CPU in a system is referred to as a package. + * @param die + * Die number. + * Each package can have several dies connected together via the uncore mesh. + * + * @return + * The current index of available frequencies. + * If error, it will return 'RTE_POWER_INVALID_FREQ_INDEX = (~0)'. + */ +uint32_t +power_get_amd_uncore_freq(unsigned int pkg, unsigned int die); + +/** + * Set minimum and maximum uncore frequency for specified die on a package + * to specified index value. + * It should be protected outside of this function for threadsafe. + * + * This function should NOT be called in the fast path. + * + * @param pkg + * Package number. + * Each physical CPU in a system is referred to as a package. + * @param die + * Die number. + * Each package can have several dies connected together via the uncore mesh. + * @param index + * The index of available frequencies. + * + * @return + * - 1 on success with frequency changed. + * - 0 on success without frequency changed. + * - Negative on error. + */ +int +power_set_amd_uncore_freq(unsigned int pkg, unsigned int die, uint32_t index); + +/** + * Set minimum and maximum uncore frequency for specified die on a package + * to maximum value according to the available frequencies. + * It should be protected outside of this function for threadsafe. + * + * This function should NOT be called in the fast path. + * + * @param pkg + * Package number. + * Each physical CPU in a system is referred to as a package. + * @param die + * Die number. + * Each package can have several dies connected together via the uncore mesh. + * + * @return + * - 1 on success with frequency changed. + * - 0 on success without frequency changed. + * - Negative on error. + */ +int +power_amd_uncore_freq_max(unsigned int pkg, unsigned int die); + +/** + * Set minimum and maximum uncore frequency for specified die on a package + * to minimum value according to the available frequencies. + * It should be protected outside of this function for threadsafe. + * + * This function should NOT be called in the fast path. + * + * @param pkg + * Package number. + * Each physical CPU in a system is referred to as a package. + * @param die + * Die number. + * Each package can have several dies connected together via the uncore mesh. + * + * @return + * - 1 on success with frequency changed. + * - 0 on success without frequency changed. + * - Negative on error. + */ +int +power_amd_uncore_freq_min(unsigned int pkg, unsigned int die); + +/** + * Return the list of available frequencies in the index array. + * + * This function should NOT be called in the fast path. + * + * @param pkg + * Package number. + * Each physical CPU in a system is referred to as a package. + * @param die + * Die number. + * Each package can have several dies connected together via the uncore mesh. + * @param freqs + * The buffer array to save the frequencies. + * @param num + * The number of frequencies to get. + * + * @return + * - The number of available index's in frequency array. + * - Negative on error. + */ +int +power_amd_uncore_freqs(unsigned int pkg, unsigned int die, + unsigned int *freqs, unsigned int num); + +/** + * Return the list length of available frequencies in the index array. + * + * This function should NOT be called in the fast path. + * + * @param pkg + * Package number. + * Each physical CPU in a system is referred to as a package. + * @param die + * Die number. + * Each package can have several dies connected together via the uncore mesh. + * + * @return + * - The number of available index's in frequency array. + * - Negative on error. + */ +int +power_amd_uncore_get_num_freqs(unsigned int pkg, unsigned int die); + +/** + * Return the number of packages (CPUs) on a system + * by parsing the uncore sysfs directory. + * + * This function should NOT be called in the fast path. + * + * @return + * - Zero on error. + * - Number of package on system on success. + */ +unsigned int +power_amd_uncore_get_num_pkgs(void); + +/** + * Return the number of dies for pakckages (CPUs) specified + * from parsing the uncore sysfs directory. + * + * This function should NOT be called in the fast path. + * + * @param pkg + * Package number. + * Each physical CPU in a system is referred to as a package. + * + * @return + * - Zero on error. + * - Number of dies for package on sucecss. + */ +unsigned int +power_amd_uncore_get_num_dies(unsigned int pkg); + +#ifdef __cplusplus +} +#endif + +#endif /* POWER_INTEL_UNCORE_H */ diff --git a/drivers/power/amd_uncore/meson.build b/drivers/power/amd_uncore/meson.build new file mode 100644 index 0000000000..ec1b741c3a --- /dev/null +++ b/drivers/power/amd_uncore/meson.build @@ -0,0 +1,20 @@ +# SPDX-License-Identifier: BSD-3-Clause +# Copyright(c) 2024 Advanced Micro Devices, Inc. + +if not is_linux + build = false + reason = 'only supported on Linux' + subdir_done() +endif + +IMB_header = '#include' +lib = cc.find_library('e_smi64', required: false) +if not lib.found() + build = false + reason = 'missing dependency, "libe_smi"' +else + ext_deps += lib +endif + +sources = files('amd_uncore.c') +deps += ['power'] diff --git a/drivers/power/meson.build b/drivers/power/meson.build index c83047af94..4ba5954e13 100644 --- a/drivers/power/meson.build +++ b/drivers/power/meson.build @@ -7,6 +7,7 @@ drivers = [ 'cppc', 'kvm_vm', 'pstate', + 'amd_uncore', 'intel_uncore' ] -- 2.34.1