From nobody Mon Dec 1 22:38:29 2025 Received: from TYVP286CU001.outbound.protection.outlook.com (mail-japaneastazon11011006.outbound.protection.outlook.com [52.101.125.6]) (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 9889B310764; Sat, 29 Nov 2025 16:04:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.125.6 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764432276; cv=fail; b=tYogkBCv0BGLjbGoEVxOOdy+AahORf0DCFmEz9CJgUZ+FD5zfDbaWcOmjQ8KYemTQ8t2Kq1SXsp1oTY9l5CiX16OS+w2SpQO6TG5ErlNHqSF/qF5IFi1L4nzzTPdCmm4Kan+iCwFahJUIcJjJ1Q9Dk0TeBYDJqxn4ZbIf7nm1ws= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764432276; c=relaxed/simple; bh=pr1fB3gT71rFk68aacz99rD9zAZF/fmO8OLC6RMRMRc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=FVINHNeztMW+wXycLt/U9toBs8WkFJto7jOUvMMbJ2lBQQCZKUeEqEJgtR2C/QSHC5Onx28CKXs17Q7avPWzMOOA52EvlUALABNYba5kzagLH7+L6TWiubgX+gSflZf/sNB3xJTloLR7TFotEPfoaxqnuMUY/EPu/ST8Y30Igoo= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=valinux.co.jp; spf=pass smtp.mailfrom=valinux.co.jp; dkim=pass (1024-bit key) header.d=valinux.co.jp header.i=@valinux.co.jp header.b=Gf6SfG9a; arc=fail smtp.client-ip=52.101.125.6 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=valinux.co.jp Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=valinux.co.jp Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=valinux.co.jp header.i=@valinux.co.jp header.b="Gf6SfG9a" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=kBSvU6xFlxVtUECK6zH/sz3agHQ07b5WswuBUV9LOI18kmkYHudUTlaaIm7G9b0FowsbOHRgtcjf74fsgWsB3G+D7REj2pWmvgMONEdR6TdE3rNR9z9YxXU5ZSrFx0PCw/hTI7CQ4y6lnMP3Kw/5RyWNdJnA3RO/OVuykMOv3AXmFPzoBMMlLXG/B6Hh9hM0nfEfChb78jrM+6F936STDBuZcoAsM/p9Lu0YsM9oaLmbwEi+FihkZloW5/hpgIXoCFPEcGuQO3jPZUbqCfi4OiBcQZs8qAcsVZlEBC6QBrn4DaPNzue9m/U9DEDEWAW9CWaDk3Xck1EXzcyx5QGv8A== 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=saJKa+sCGbwpGbPaP2pGUN1WWDGqCQYoONNRfXTw1/0=; b=V2WZAKXu7cRz6/c6IM6X1e55QDk5mjbLtsC6m1VlBjmTN4CdiCDK78S5cMKxB49BgMRWUmu0B5GooBeuagwmxYk9HGO0zesXv4KlPBx9zNY3yrid60lPw3mH4AGEzXBZUY4hjiVEZsgaPuBcKIOQoKj6qn5bq3gi2vNtNSzWdJ8ZfZz4yKYhkSt9x04bZc9wjHKG3UcEqp4ffbstDn4HhdT5V1SHsExjT9aHb/R+DrPRc/69nUcIQosPHSEwdVhetmy5twg8a5G1+LsruKeb+Ab3oWm0nACBc6EnT26ALcRvFVxSxFmKb9MY24SuMU52C4Qs5xBf4EtsIjaAlHvDzg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=valinux.co.jp; dmarc=pass action=none header.from=valinux.co.jp; dkim=pass header.d=valinux.co.jp; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=valinux.co.jp; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=saJKa+sCGbwpGbPaP2pGUN1WWDGqCQYoONNRfXTw1/0=; b=Gf6SfG9a5br1Ls8tHnUzHJmGVuUzsznQfjh/17TC/RfSXwwek8YitRKEtNM2zrTVu0jKq+Z3xnMlJaWvt7fDeVkbpFq4Oxfo1kDx47Q7doEBna02Y94tYXBaANH1t8zDBOXNw6nXeRXkZLCEOCNHftSFVfow/risWfmyUeHhUYY= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=valinux.co.jp; Received: from TYWP286MB2697.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:24c::11) by TYCP286MB2050.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:15e::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9366.17; Sat, 29 Nov 2025 16:04:28 +0000 Received: from TYWP286MB2697.JPNP286.PROD.OUTLOOK.COM ([fe80::fb7e:f4ed:a580:9d03]) by TYWP286MB2697.JPNP286.PROD.OUTLOOK.COM ([fe80::fb7e:f4ed:a580:9d03%5]) with mapi id 15.20.9366.012; Sat, 29 Nov 2025 16:04:28 +0000 From: Koichiro Den To: ntb@lists.linux.dev, linux-pci@vger.kernel.org, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, Frank.Li@nxp.com Cc: mani@kernel.org, kwilczynski@kernel.org, kishon@kernel.org, bhelgaas@google.com, corbet@lwn.net, vkoul@kernel.org, jdmason@kudzu.us, dave.jiang@intel.com, allenbh@gmail.com, Basavaraj.Natikar@amd.com, Shyam-sundar.S-k@amd.com, kurt.schwemmer@microsemi.com, logang@deltatee.com, jingoohan1@gmail.com, lpieralisi@kernel.org, robh@kernel.org, jbrunet@baylibre.com, fancer.lancer@gmail.com, arnd@arndb.de, pstanner@redhat.com, elfring@users.sourceforge.net Subject: [RFC PATCH v2 10/27] NTB: core: Add .get_pci_epc() to ntb_dev_ops Date: Sun, 30 Nov 2025 01:03:48 +0900 Message-ID: <20251129160405.2568284-11-den@valinux.co.jp> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20251129160405.2568284-1-den@valinux.co.jp> References: <20251129160405.2568284-1-den@valinux.co.jp> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: TYCP286CA0061.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:31a::13) To TYWP286MB2697.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:24c::11) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: TYWP286MB2697:EE_|TYCP286MB2050:EE_ X-MS-Office365-Filtering-Correlation-Id: 422237bc-f226-4f67-92c3-08de2f60f973 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|366016|1800799024|10070799003; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?5XKU0vgvB7I6Pune+XwNqFnmltXFK1LMfL4xK4OJatvGWT4dD0qmJhVLDZft?= =?us-ascii?Q?1ez4iX7HZOD3mKDulpuAle3vv7VM/U9SvJq5H751sMUfAtJym5Z/q7lUqWhJ?= =?us-ascii?Q?soxZbmqfe3O4O72+HpbjaBv0SLwsBcTY5gEsNdk1M2E4A03sWah098nzO2fv?= =?us-ascii?Q?XDZ4jQDbRTIpVExt20m5Hl4YdcZIP0bOoSaV2RKXCsXDViOyXGGY3UWKBULz?= =?us-ascii?Q?OqGLyC7mm2jHNAQqrTWaqv4k/OzeyqJvAl1q+8HLZYo+bsZ/teBu/nxZZvAI?= =?us-ascii?Q?Itp8KE3bj52O5pcrcmj2AAjuwKYz0AUqQ9HY5CU4YmBHKbm1xmD2Z4Zr697q?= =?us-ascii?Q?N1xQoJD/GdkIpBiQlf2ThUNwdb10cp4/9Zb6NV4LXeXtLdUAWzerAdoPZaNL?= =?us-ascii?Q?yNn8Gvyosyb2eyTPTPIwEGJgZZ3zKoXH6XuL2jwanPzO5YeEUH8RtwTRDevd?= =?us-ascii?Q?pdnfrGdNjkx1xCigQRqvTLAMjdxHXFmQEZBskAZEWpLdXNdqqNAuqzCfIS/D?= =?us-ascii?Q?PorPVSwo+Tx94AT+Z5ZPUUnkEezNr3otQJezl5tSUJQFFu0JNmbcx7KkiSwQ?= =?us-ascii?Q?C/uwv9TLxbXwzH5AASRO0vTS3Fdf1bfxIdOPS9kmoMUhdAx+9WTDgji0w9ju?= =?us-ascii?Q?el2pH03beGCAPtvfmO13DS5VEe/flKPY7OXVzGxnQRIWLuxzk+0Aql1TzyNg?= =?us-ascii?Q?yVjpwy5sR+ms7ucaUtVUP5fglZG49bmvDF9bznTODX/NIMnSMm11WnJR2jUf?= =?us-ascii?Q?G2qRG3juEXgXI+Cqo7OboZluLUtQO5EvO6tr67xNqnrWqb7VnAL90qKvynmi?= =?us-ascii?Q?fYBsYe+25I1PZgIG+9iBJeN46w1GRPfdTXSWzmkVoRiOoAaKZ0P/2Fuz6NOo?= =?us-ascii?Q?1uR/lsbUU/ywGuYXSgwST5KjT858Onavwb3r06PQtd4wamJJ4os9WxBVmXU8?= =?us-ascii?Q?oE8eceym/DWxrqZBtUTIP2YGeViSd3IniVIgLU1hITOtK1kbxdgs4cwPkAXA?= =?us-ascii?Q?yHhWUGz4JxrOlbkv0sfKL7AH5bwNHC+Xi0yXSLvVAn/Mffog6v7y20NisxAy?= =?us-ascii?Q?nkFOS7hbcWOlID5RDqVZbUMQP0kzkCSQa9xuHYJIRr55wH30fbp0gJpGQwPx?= =?us-ascii?Q?2C+SC8WjbieNbPgT7vvIawfkMep86FkkBDNbP837oy9aSOIQ53poHGAM0/u+?= =?us-ascii?Q?XhBl8IPVyCodwZvpIUjfHzvy5fDSzhbDJn/IGiEI1tBvH3DDvxFYsZz1PN5j?= =?us-ascii?Q?oiL/n+3Zy0o4RTN7dSKAmTCAw0aODcHJ3+9hXZ2E8d0pOrrfllPs6QCFJSFU?= =?us-ascii?Q?XmLz+zvg8lIchXwPvXUYN8fjMPy01H55bBJ4IH+BEbNyRzXoKHEJu16ePc+z?= =?us-ascii?Q?81pABd1oHX+yMbhKvCBEqYxREFWaQKF7Y8x9s5CR12tOiM7ACfSulv0fDtZF?= =?us-ascii?Q?Z8K+3keju6TBvdVdvB/UAINEc762yUm7?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:TYWP286MB2697.JPNP286.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230040)(7416014)(376014)(366016)(1800799024)(10070799003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?Bnns60zK9lwXFleY2XFOZbFlsv7Auvou/HkLrJdxZxdRDR6fQsHhcguebvFQ?= =?us-ascii?Q?Dx/Ju8s0o80tOLaENbPlW62P7ZYxZqTM9zyZoM7joX0Nr8zzDfKiJmBUViGz?= =?us-ascii?Q?+sniM7Do3M7mnexY0lKxkCWYl1LzuKZQ06VxDG/VCuwbVHNXQDEYw7gibigk?= =?us-ascii?Q?M1Bx0YOJ3TasFOKFv8DkL3dKHjLW5GR0GsxObyv0z+Y8GcKJFrqUlRVACMTf?= =?us-ascii?Q?bGzkl4hYGmHyHp4y+mCmWr1AN5RH39PhNtKti1gughDoD2USKngKoxc0gVbI?= =?us-ascii?Q?czIgONUHvgHf/G+VautMi9x1tXsrsSbxOHNgE+VmrbiN835spWlX9EaFjkS3?= =?us-ascii?Q?ieVNKkFW/KMmYCIdYnWmIx/urEG0g2bZjg6KrfRbCLj+kNUxfv5vypW9NhD+?= =?us-ascii?Q?KwZ8rxv+n0awJxgGY74ilVL2hNFnZ5Wyk8v2WsYrWvg+IB6rY66dQGGeO9yF?= =?us-ascii?Q?Gyrvv9DSIHN1ojd+t5HAlwNB5RtaePwhb6wVvIREHhSBGZJQj/bvQBUYpau4?= =?us-ascii?Q?lbWYmQkqGnBgJKoqedzTj3E0ls670u2bTOcSvTwX7syBGdRFXC11piT+NFcc?= =?us-ascii?Q?i7ZxiTPVRCH5ijA6rh+5BonPfEDtE4dIYJ2q4ak0+/2ePH4HOtFtaG4kMlpS?= =?us-ascii?Q?+ZTLipySrdeDaHgSMUJb7U4Wsxuz7yVBgnK2ACxwIuXbkvp/x/25fUvUa2Cf?= =?us-ascii?Q?/tHWkye8WYJKGCgVDLFAb0drrCgIXMrPob+h7z6gxsusjzUjb8/6vsYu58oX?= =?us-ascii?Q?G/2+fKvb95kFVsXa3IntlPoJk+dt5V+30lIAm3D6p78GhLzCdq9MS3vjhnJe?= =?us-ascii?Q?rf/viSnOfYTZKQxS3FDUcAKahrk7/2QNKTga/xi0Q32E3G8G0TZlHDl1PGte?= =?us-ascii?Q?bJttnkN9vMueeoIYssq6uY8NESM6d3oDXkS3Phl5+rCPEMbozm1dcOcpkkKz?= =?us-ascii?Q?NbKb3wQmRX3+mjLVbqvitxWJXkYrzJ8pH0vvPrUad0I75PjgZpEnFNufiUCT?= =?us-ascii?Q?g2Ue0H8Ii2ABgHl0myTnZ1r3AaKUme6jIGH0EWsVM+LOsanmDMQfOaa0YMze?= =?us-ascii?Q?YWF0T7aX8Z7SMx63hc6wnf0l90+dE3pYnR82OcemtTkJJ/xPS6T75Y9ujiqO?= =?us-ascii?Q?Ww443T2jB5lU7msO5/TWuEflwUKwwwNimwncTvL/lLT5eQKDCZwMpjWxMnlz?= =?us-ascii?Q?xl1UimI7JYpDPnzA/uqlJypw599l52+geHE6PFQuAKEQ+TmpRUGiQMarIQ93?= =?us-ascii?Q?a2tbpYUT9/WnDCiOCu/KayPBAG6/MyAWRVD5/qguyfpKoiOUcJyGFNBoUGmB?= =?us-ascii?Q?+rOovWC1Z7skoprFa83czEX1Lkq84xGPG9DEC3M3hyH3GJm8xWr0yCfbsqFy?= =?us-ascii?Q?dLdNUcDoMGR0+yKwyKssWKNx2sk26A7qhZ/Ng3Hs+bMR+8rprvBvg8Z+1Uln?= =?us-ascii?Q?jk0jVGXa4xR+sqUpCDvtvx3mLRZzYuvBRzw/DYyys/xJfhXWRpcK9xO4VB82?= =?us-ascii?Q?nGpydNZYg/KPxRWNHjdHtfQBVb9L4ZtqqpnFS2qdFSORZ3488GvE/A5DCgJm?= =?us-ascii?Q?2HoegtMsBmKm8rnrUQ0mJRsIfONlHTUivGNBsPgCYB6eFwUMvAIJHp5CCQeW?= =?us-ascii?Q?i8W0Vf5OZdDOoTmmUKtuTDY=3D?= X-OriginatorOrg: valinux.co.jp X-MS-Exchange-CrossTenant-Network-Message-Id: 422237bc-f226-4f67-92c3-08de2f60f973 X-MS-Exchange-CrossTenant-AuthSource: TYWP286MB2697.JPNP286.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Nov 2025 16:04:28.2502 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 7a57bee8-f73d-4c5f-a4f7-d72c91c8c111 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: gSBCKUYcUyQDG3ZMBoHgRfMBk1CcvGrt8ckbdDklliyc0Eoxnb1/ofOlrV9ZrDDoKXj6fJjNfD9DWGPC/NA1Pw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: TYCP286MB2050 Content-Type: text/plain; charset="utf-8" Add an optional get_pci_epc() callback to retrieve the underlying pci_epc device associated with the NTB implementation. Signed-off-by: Koichiro Den --- drivers/ntb/hw/epf/ntb_hw_epf.c | 11 +---------- include/linux/ntb.h | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+), 10 deletions(-) diff --git a/drivers/ntb/hw/epf/ntb_hw_epf.c b/drivers/ntb/hw/epf/ntb_hw_ep= f.c index a3ec411bfe49..d55ce6b0fad4 100644 --- a/drivers/ntb/hw/epf/ntb_hw_epf.c +++ b/drivers/ntb/hw/epf/ntb_hw_epf.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include =20 @@ -49,16 +50,6 @@ =20 #define NTB_EPF_COMMAND_TIMEOUT 1000 /* 1 Sec */ =20 -enum pci_barno { - NO_BAR =3D -1, - BAR_0, - BAR_1, - BAR_2, - BAR_3, - BAR_4, - BAR_5, -}; - enum epf_ntb_bar { BAR_CONFIG, BAR_PEER_SPAD, diff --git a/include/linux/ntb.h b/include/linux/ntb.h index d7ce5d2e60d0..04dc9a4d6b85 100644 --- a/include/linux/ntb.h +++ b/include/linux/ntb.h @@ -64,6 +64,7 @@ struct ntb_client; struct ntb_dev; struct ntb_msi; struct pci_dev; +struct pci_epc; =20 /** * enum ntb_topo - NTB connection topology @@ -256,6 +257,7 @@ static inline int ntb_ctx_ops_is_valid(const struct ntb= _ctx_ops *ops) * @msg_clear_mask: See ntb_msg_clear_mask(). * @msg_read: See ntb_msg_read(). * @peer_msg_write: See ntb_peer_msg_write(). + * @get_pci_epc: See ntb_get_pci_epc(). */ struct ntb_dev_ops { int (*port_number)(struct ntb_dev *ntb); @@ -331,6 +333,7 @@ struct ntb_dev_ops { int (*msg_clear_mask)(struct ntb_dev *ntb, u64 mask_bits); u32 (*msg_read)(struct ntb_dev *ntb, int *pidx, int midx); int (*peer_msg_write)(struct ntb_dev *ntb, int pidx, int midx, u32 msg); + struct pci_epc *(*get_pci_epc)(struct ntb_dev *ntb); }; =20 static inline int ntb_dev_ops_is_valid(const struct ntb_dev_ops *ops) @@ -393,6 +396,9 @@ static inline int ntb_dev_ops_is_valid(const struct ntb= _dev_ops *ops) /* !ops->msg_clear_mask =3D=3D !ops->msg_count && */ !ops->msg_read =3D=3D !ops->msg_count && !ops->peer_msg_write =3D=3D !ops->msg_count && + + /* Miscellaneous optional callbacks */ + /* ops->get_pci_epc && */ 1; } =20 @@ -1567,6 +1573,21 @@ static inline int ntb_peer_msg_write(struct ntb_dev = *ntb, int pidx, int midx, return ntb->ops->peer_msg_write(ntb, pidx, midx, msg); } =20 +/** + * ntb_get_pci_epc() - get backing PCI endpoint controller if possible. + * @ntb: NTB device context. + * + * Get the backing PCI endpoint controller representation. + * + * Return: A pointer to the pci_epc instance if available. or %NULL if not. + */ +static inline struct pci_epc __maybe_unused *ntb_get_pci_epc(struct ntb_de= v *ntb) +{ + if (!ntb->ops->get_pci_epc) + return NULL; + return ntb->ops->get_pci_epc(ntb); +} + /** * ntb_peer_resource_idx() - get a resource index for a given peer idx * @ntb: NTB device context. --=20 2.48.1