From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from NAM04-MW2-obe.outbound.protection.outlook.com (mail-mw2nam04on2061.outbound.protection.outlook.com [40.107.101.61]) (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 9C1B027E7EF; Wed, 14 May 2025 13:28:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.101.61 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747229305; cv=fail; b=PzyEKi0v8R83Vd+rsjdOXN+FMukwUCFDTu+6tZTFjRgU99ceWCxNiLaCJJfKxs0MrrP6lmfSbzUhvFnmvr5uW0dFOEaG7qd2A7XvUGREXz82edZkWjHLAhSdGqWQh10bTntKAwdx3lzypMoxAkz2ik+ng7RePizcUsaTHY2Kipg= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747229305; c=relaxed/simple; bh=tFkraHrTeDcX8jukOfcmoJHLxyVqTX2Crs8knJ16g8Y=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=HNzsrHWJE4MCZyrZiEZJku0ibghXX+IKFpLr71Tu5uInrLtzch/3wgELqvjca5g6AN9TjQ5hCENvaFIReB7wEAHA7wplRxF33K3q36Sap6Ttlw2A7OxxRgxwMLtcJyCYehhKEzds5VUylR4CgLc4RCLVnFOJ/r1YOuTgtLtSknc= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=aXfRzDtV; arc=fail smtp.client-ip=40.107.101.61 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="aXfRzDtV" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=lVBrfkfYuXTu56A2oV1ykB3IrZ9j3rzefWK8ydcpWD5m2fp/EKAoDljZiX0JA+q29f2PzbY9gm4K08cSRaR7mCNzUL0rU3vG1OIfwJ+r9Ma334WJXmi5MjNpxMNuifhaesDkH5+udJTqw1rUWhnK5yEFpczjGf1TWWDciku6YCVVuG7AZ9kvzd9m7iGD9riAgUSk2w/hzmRVsKndthrvUr2KKhrmAPbbzc/Uc36KA0mqy//XjqSbLVpppNIFDJXRySEIX7DpKySNWj/tSPx2OC19oI+hBpThyziTe02W7x6YmTQCXZauQOxOzH5Y9U7F3mHXYut8VcmYF3lLK7/lBA== 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=R7S6YReqPTYpf+o2BRl1ax5G+FuTtmiar2P7yDfiMIA=; b=ReoAIFcXFGdCLOmxkis8jB33tjXrDvBW25J15mijqcC2EUZzj7zhi26WFLoAvIF4D1oayscot3E2WRhVInzKxcadKqjNhjfG84mhjgY65d8wb9rjP47VMPHhgiFpqc6YeqZbfKwdi3GWlaTKQdiRbapZI22T6M4gtXVNRnF6xoV6Ojxt5Ryjkc+PK7di1eZTbSOGOSOPIGtKA4wxIjb7L44zqnDrlI/bgd7F1TLoeXD0fzU6OrVaqGY4elcQ8ri2u0C8FG0+r7SOmn0QrD8lP0Wc2ItGQW4uNchAmnK09EcOW8dxn4m1b3x+0ql2Ojmji3ihzPzNpMXazY2CgdpL4Q== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=vger.kernel.org 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=R7S6YReqPTYpf+o2BRl1ax5G+FuTtmiar2P7yDfiMIA=; b=aXfRzDtV2B2QEyUopWHbNB3YZQFdOvRL8iB7imrZBSF+s7y6WIqGXLAx9RS5pRW1z2pw5EuKB1aVLqnrvyiSpO6kKAo+bgIS9qrTTtmtYFmV9hcHjee64OZEMowoeVlvq1QyV/KUeakwzbMG+YVj7F99xNf6OJScSidRD6z4UpY= Received: from CH2PR20CA0024.namprd20.prod.outlook.com (2603:10b6:610:58::34) by PH7PR12MB7987.namprd12.prod.outlook.com (2603:10b6:510:27c::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8722.29; Wed, 14 May 2025 13:28:21 +0000 Received: from CH1PEPF0000AD81.namprd04.prod.outlook.com (2603:10b6:610:58:cafe::8) by CH2PR20CA0024.outlook.office365.com (2603:10b6:610:58::34) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.8699.33 via Frontend Transport; Wed, 14 May 2025 13:28:20 +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 CH1PEPF0000AD81.mail.protection.outlook.com (10.167.244.89) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8722.18 via Frontend Transport; Wed, 14 May 2025 13:28:20 +0000 Received: from SATLEXMB06.amd.com (10.181.40.147) 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; Wed, 14 May 2025 08:28:19 -0500 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB06.amd.com (10.181.40.147) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Wed, 14 May 2025 08:28:19 -0500 Received: from xcbalucerop40x.xilinx.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 via Frontend Transport; Wed, 14 May 2025 08:28:18 -0500 From: To: , , , , , , , , CC: Alejandro Lucero , Zhi Wang , "Jonathan Cameron" , Ben Cheatham Subject: [PATCH v16 16/22] cxl/region: Factor out interleave ways setup Date: Wed, 14 May 2025 14:27:37 +0100 Message-ID: <20250514132743.523469-17-alejandro.lucero-palau@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250514132743.523469-1-alejandro.lucero-palau@amd.com> References: <20250514132743.523469-1-alejandro.lucero-palau@amd.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000AD81:EE_|PH7PR12MB7987:EE_ X-MS-Office365-Filtering-Correlation-Id: 07f04fed-0f3e-46b3-549d-08dd92eb31a7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?lIyR+gdIWjl5wWFqi+I+8I1okJhx7Jfub7e1oNZ4o3yCSTn6K+PNkaugrOt4?= =?us-ascii?Q?GolGmqXAXhpj8R8MvBZW6pzhcz9k1oUUoFjJO6dJz5Xld7sRWawRGAOzC+rZ?= =?us-ascii?Q?LzYczeJH7ZW/bg+VBVesAe0bNHHCAEUmKzmBueCzBGogcR9dmExXqGUOv7mX?= =?us-ascii?Q?M2XePakXGE8qArKHEulhNvq0LZAIvE0pGYNjOSXrf3eWifJe5TWMT3CmI5og?= =?us-ascii?Q?Px5d/7c7YpNyyQOJTGElRh88dKvGkc2CVSTsCw9jp44yoW7y2xENr346T4b/?= =?us-ascii?Q?qFO6KNAaVhjjhtCztF4TNsqBUnmALgKcthjwKI2wKoYQqymJm1txEJy8YiiI?= =?us-ascii?Q?mDTah5liKk9SduPCZnTp7yVO95sEIG4yp/q81iXrDzS88UoSDGmqr1K52l5s?= =?us-ascii?Q?3H/5TUG6k8oWgXKMd5E4qlCk4bdFE4e+sR7HtXqcgVQ7p2vF8Eojq3BJ4YvY?= =?us-ascii?Q?xTZj7T/1UZZqs0ts4ozAsU2tihIIlK4av4lUQWA4Tj++6LJ05oLOjdy+wgnU?= =?us-ascii?Q?4mau1VAGDa63ELWhhzbDfQrZFtixdHedFGee2bMYTZQrCHe7L0c4gjQLarCz?= =?us-ascii?Q?RXWTJTzUqgWznbOwX5J7MiRhgUf6SsWY3cSiTz+0DU9Gac+ztcTW3xduR1Qe?= =?us-ascii?Q?DcdVu4Do9mBmngU+7/N/4Nf+eNxqPvQikOUO4I09w5Hxl7i7t0D7GbQ1Pwfn?= =?us-ascii?Q?ZshYE0Jw6cx2Bd2Ay2SdAJpeKQRwYjtoJODPn13xWCF88YTwKogcVxBFoCEd?= =?us-ascii?Q?hQCYZGcHm+zIJ3CQYkhXDnbT/CpiVJzCu/5EcQ+XZzbhYMoSMLEQkEVAZ0bI?= =?us-ascii?Q?ns2osSYkYSjueSoIA/mhFi/FD9/PtgFNpZ8eEzQI0FTOq+c/0rW3Pj74jrgB?= =?us-ascii?Q?OUEKA0Ibp6O1R0etyAgPbm+C4k99aO5016k+Sbdyan8qFZ5vwekwpGtFtkh9?= =?us-ascii?Q?Xpb3rwjgD7MkU7cbEOqexPv73zLGLQ8Nl9J0NwD5e10v3yDof3eKvAcBNS6r?= =?us-ascii?Q?v4jYD8hUpHMW9BwUmPJvvE37bYMpCQDuOtEU8GsIQuszU09JwZOwIC3u4blg?= =?us-ascii?Q?kzuwmcRJGP5B3ZhAFb2HDyhnZi/2UpVDmPrb/G1R24pJqje8D8vrIKqv4T1y?= =?us-ascii?Q?JeANF7p1tZDNRSA9x+5AHRt4NBiqC59/QL8fj70474Ok9pwtLmCfbakpLSZF?= =?us-ascii?Q?XShzKb6T9FCA5k0XM+AGrfaOU9kwwHVgkPGidv0Uo4CGeKAZc7uRKCd5bSKa?= =?us-ascii?Q?aG4KBn+98zKLPfCYwjtf9N6mDR+PEXDXhnnzSS/CuQKkoCwFpgj/acGDGUi9?= =?us-ascii?Q?xjdZ9zocJfo4C2RjstQZimjHtLo1xulaq1CLjoGjW2ucrVfuoUMVLKhJnAEm?= =?us-ascii?Q?ByjoDjh/gcA6KGpZnh5NiYt58j81Ku5Zfxhba4LPc1EqeXE2X78W/P+PUGEX?= =?us-ascii?Q?JQS7ALHJHW48zh6JEMoAOXhqWTlcVM13CZI+pI1N+WuAvl1vm9eMa8DkEjKH?= =?us-ascii?Q?jvc2GHkQt9E9aGcU6dVfC8xLR2SjWYUzV+ha?= 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)(376014)(7416014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 May 2025 13:28:20.3937 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 07f04fed-0f3e-46b3-549d-08dd92eb31a7 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: CH1PEPF0000AD81.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7987 From: Alejandro Lucero Region creation based on Type3 devices is triggered from user space allowing memory combination through interleaving. In preparation for kernel driven region creation, that is Type2 drivers triggering region creation backed with its advertised CXL memory, factor out a common helper from the user-sysfs region setup for interleave ways. Signed-off-by: Alejandro Lucero Reviewed-by: Zhi Wang Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Reviewed-by: Ben Cheatham --- drivers/cxl/core/region.c | 46 +++++++++++++++++++++++---------------- 1 file changed, 27 insertions(+), 19 deletions(-) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index e13a812529ff..0f61c9e9b954 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -464,22 +464,14 @@ static ssize_t interleave_ways_show(struct device *dev, static const struct attribute_group *get_cxl_region_target_group(void); -static ssize_t interleave_ways_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) +static int set_interleave_ways(struct cxl_region *cxlr, int val) { - struct cxl_root_decoder *cxlrd = to_cxl_root_decoder(dev->parent); + struct cxl_root_decoder *cxlrd = to_cxl_root_decoder(cxlr->dev.parent); struct cxl_decoder *cxld = &cxlrd->cxlsd.cxld; - struct cxl_region *cxlr = to_cxl_region(dev); struct cxl_region_params *p = &cxlr->params; - unsigned int val, save; - int rc; + int save, rc; u8 iw; - rc = kstrtouint(buf, 0, &val); - if (rc) - return rc; - rc = ways_to_eiw(val, &iw); if (rc) return rc; @@ -494,20 +486,36 @@ static ssize_t interleave_ways_store(struct device *dev, return -EINVAL; } - rc = down_write_killable(&cxl_region_rwsem); - if (rc) - return rc; - if (p->state >= CXL_CONFIG_INTERLEAVE_ACTIVE) { - rc = -EBUSY; - goto out; - } + lockdep_assert_held_write(&cxl_region_rwsem); + if (p->state >= CXL_CONFIG_INTERLEAVE_ACTIVE) + return -EBUSY; save = p->interleave_ways; p->interleave_ways = val; rc = sysfs_update_group(&cxlr->dev.kobj, get_cxl_region_target_group()); if (rc) p->interleave_ways = save; -out: + + return rc; +} + +static ssize_t interleave_ways_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct cxl_region *cxlr = to_cxl_region(dev); + unsigned int val; + int rc; + + rc = kstrtouint(buf, 0, &val); + if (rc) + return rc; + + rc = down_write_killable(&cxl_region_rwsem); + if (rc) + return rc; + + rc = set_interleave_ways(cxlr, val); up_write(&cxl_region_rwsem); if (rc) return rc; -- 2.34.1