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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 DM6NAM11FT051.mail.protection.outlook.com (10.13.172.243) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5632.12 via Frontend Transport; Tue, 20 Sep 2022 05:52:08 +0000 Received: from SATLEXMB04.amd.com (10.181.40.145) 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 15.1.2375.28; Tue, 20 Sep 2022 00:52:06 -0500 Received: from xhdswatia40.xilinx.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2375.28 via Frontend Transport; Tue, 20 Sep 2022 00:52:01 -0500 From: Sarath Babu Naidu Gaddam To: , , , , CC: , , , , , , , , , , Subject: [RFC V3 PATCH 4/8] dmaengine: xilinx_dma: Increase AXI DMA transaction segment count Date: Tue, 20 Sep 2022 11:21:15 +0530 Message-ID: <20220920055119.12634-5-sarath.babu.naidu.gaddam@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220920055119.12634-1-sarath.babu.naidu.gaddam@amd.com> References: <20220920055119.12634-1-sarath.babu.naidu.gaddam@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT051:EE_|MW4PR12MB7215:EE_ X-MS-Office365-Filtering-Correlation-Id: 24cd9928-706f-4372-9bea-08da9acc4184 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Sep 2022 05:52:08.8468 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 24cd9928-706f-4372-9bea-08da9acc4184 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: DM6NAM11FT051.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB7215 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Radhey Shyam Pandey Increase AXI DMA transaction segments count to ensure that even in high load we always get a free segment in prepare descriptor for a DMA_SLAVE transaction. Signed-off-by: Radhey Shyam Pandey Signed-off-by: Sarath Babu Naidu Gaddam --- Changes in V3 and V2: - None --- drivers/dma/xilinx/xilinx_dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dm= a.c index 12b1281b19bf..8c6065cbda79 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -178,7 +178,7 @@ #define XILINX_DMA_BD_SOP BIT(27) #define XILINX_DMA_BD_EOP BIT(26) #define XILINX_DMA_COALESCE_MAX 255 -#define XILINX_DMA_NUM_DESCS 255 +#define XILINX_DMA_NUM_DESCS 512 #define XILINX_DMA_NUM_APP_WORDS 5 =20 /* AXI CDMA Specific Registers/Offsets */ --=20 2.25.1