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b=F+rh+5iJYM7vm5UHCkMaQ5VDLSlt8J7iKk6V4O4qXiJY9cl+OAiMoCpq5WCpwNH0675jZobS/EJKetoONglxOhg5YDhO9ZBUwVk1OUX9KEUdug4mljFwKqM/R0s7N6MZgOk4DUJt6A/00ers9S8NFn0dKkyUsjuTvo0vj+PSHFk= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=valinux.co.jp; Received: from OS3P286MB0979.JPNP286.PROD.OUTLOOK.COM (2603:1096:604:10d::7) by OS7P286MB7183.JPNP286.PROD.OUTLOOK.COM (2603:1096:604:456::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9253.13; Thu, 23 Oct 2025 07:19:35 +0000 Received: from OS3P286MB0979.JPNP286.PROD.OUTLOOK.COM ([fe80::80f1:db56:4a11:3f7a]) by OS3P286MB0979.JPNP286.PROD.OUTLOOK.COM ([fe80::80f1:db56:4a11:3f7a%5]) with mapi id 15.20.9253.011; Thu, 23 Oct 2025 07:19:34 +0000 From: Koichiro Den To: ntb@lists.linux.dev, linux-pci@vger.kernel.org, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org 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, Frank.Li@nxp.com, fancer.lancer@gmail.com, arnd@arndb.de, pstanner@redhat.com, elfring@users.sourceforge.net Subject: [RFC PATCH 10/25] NTB/msi: Support offsetted partial memory window for MSI Date: Thu, 23 Oct 2025 16:19:01 +0900 Message-ID: <20251023071916.901355-11-den@valinux.co.jp> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20251023071916.901355-1-den@valinux.co.jp> References: <20251023071916.901355-1-den@valinux.co.jp> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: TYCP286CA0290.JPNP286.PROD.OUTLOOK.COM (2603:1096:400:3c8::7) To OS3P286MB0979.JPNP286.PROD.OUTLOOK.COM (2603:1096:604:10d::7) 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: OS3P286MB0979:EE_|OS7P286MB7183:EE_ X-MS-Office365-Filtering-Correlation-Id: 1e7c99c7-dde8-4feb-7633-08de120484ad X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|7416014|1800799024|10070799003; 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charset="utf-8" The NTB API functions ntb_mw_set_trans() and ntb_mw_get_align() now support non-zero MW offsets. Update ntb/msi to make use of this capability by propagating the alignment offset when setting up a MW translation for MSI. Signed-off-by: Koichiro Den --- drivers/ntb/msi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/ntb/msi.c b/drivers/ntb/msi.c index 8875bcbf2ea4..4dc134cf404f 100644 --- a/drivers/ntb/msi.c +++ b/drivers/ntb/msi.c @@ -97,7 +97,7 @@ int ntb_msi_setup_mws(struct ntb_dev *ntb) struct msi_desc *desc; u64 addr; int peer, peer_widx; - resource_size_t addr_align, size_align, size_max; + resource_size_t addr_align, size_align, size_max, offset; resource_size_t mw_size =3D SZ_32K; resource_size_t mw_min_size =3D mw_size; int i; @@ -132,7 +132,7 @@ int ntb_msi_setup_mws(struct ntb_dev *ntb) } =20 ret =3D ntb_mw_get_align(ntb, peer, peer_widx, NULL, - &size_align, &size_max, NULL); + &size_align, &size_max, &offset); if (ret) goto error_out; =20 @@ -142,7 +142,7 @@ int ntb_msi_setup_mws(struct ntb_dev *ntb) mw_min_size =3D mw_size; =20 ret =3D ntb_mw_set_trans(ntb, peer, peer_widx, - addr, mw_size, 0); + addr, mw_size, offset); if (ret) goto error_out; } --=20 2.48.1