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b=Zl8ZHSrtnWTCv3frQtt4GLSpLhk4sudYTn7PeFu7/osjJlyt/iIl/U+Ali0+vcgn4HqpWTiY6DiSDgnI5JyrG1MQoSc8Y3hS7Jrc31P2t40r8GPlItNCJBNpiaIL41SQ1QNJv75F3Iu3vUCPHrw7hF9cQIZL+JSu8+WlPWJIHNU= 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 07:19:33 +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 07:19:33 +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 09/25] NTB: ntb_transport: Support offsetted partial memory windows Date: Thu, 23 Oct 2025 16:19:00 +0900 Message-ID: <20251023071916.901355-10-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: TY4P301CA0044.JPNP301.PROD.OUTLOOK.COM (2603:1096:405:36b::8) 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: 1cff626e-c1c2-4b3e-dd6e-08de120483b6 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_transport to make use of this capability by propagating the offset when setting up MW translations. Signed-off-by: Koichiro Den --- drivers/ntb/ntb_transport.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index 4bb1a64c1090..3f3bc991e667 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -877,13 +877,14 @@ static int ntb_set_mw(struct ntb_transport_ctx *nt, i= nt num_mw, size_t xlat_size, buff_size; resource_size_t xlat_align; resource_size_t xlat_align_size; + resource_size_t offset; int rc; =20 if (!size) return -EINVAL; =20 rc =3D ntb_mw_get_align(nt->ndev, PIDX, num_mw, &xlat_align, - &xlat_align_size, NULL, NULL); + &xlat_align_size, NULL, &offset); if (rc) return rc; =20 @@ -918,7 +919,7 @@ static int ntb_set_mw(struct ntb_transport_ctx *nt, int= num_mw, =20 /* Notify HW the memory location of the receive buffer */ rc =3D ntb_mw_set_trans(nt->ndev, PIDX, num_mw, mw->dma_addr, - mw->xlat_size, 0); + mw->xlat_size, offset); if (rc) { dev_err(&pdev->dev, "Unable to set mw%d translation", num_mw); ntb_free_mw(nt, num_mw); --=20 2.48.1