Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37;
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
From:   Nava kishore Manne <nava.kishore.manne@amd.com>
To:     <mdf@kernel.org>, <hao.wu@intel.com>, <yilun.xu@intel.com>,
        <trix@redhat.com>, <sumit.semwal@linaro.org>,
        <christian.koenig@amd.com>, <linux-fpga@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <linux-media@vger.kernel.org>,
        <dri-devel@lists.freedesktop.org>, <linaro-mm-sig@lists.linaro.org>
Subject: [RFC 2/2] fpga: versal: Use the scatterlist interface
Date:   Wed, 22 Nov 2023 11:00:35 +0530
Message-ID: <20231122053035.3758124-3-nava.kishore.manne@amd.com>
In-Reply-To: <20231122053035.3758124-1-nava.kishore.manne@amd.com>
References: <20231122053035.3758124-1-nava.kishore.manne@amd.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Nov 2023 05:31:09.0590
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: c6e237e2-dc7b-424d-b4a5-08dbeb1c3b63
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: BL6PEPF0001AB4B.namprd04.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR12MB6121
X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,
        DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO,
        RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE,
        T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Tue, 21 Nov 2023 21:31:40 -0800 (PST)

Allows drivers to request the Configuration image
be loaded from dma-able continuous buffer to avoid
needless memory pressure and delays due to multiple
copies.

Signed-off-by: Nava kishore Manne <nava.kishore.manne@amd.com>
---
 drivers/fpga/versal-fpga.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/fpga/versal-fpga.c b/drivers/fpga/versal-fpga.c
index 3710e8f01be2..bf4fb4426417 100644
--- a/drivers/fpga/versal-fpga.c
+++ b/drivers/fpga/versal-fpga.c
@@ -19,6 +19,18 @@ static int versal_fpga_ops_write_init(struct fpga_manager *mgr,
 	return 0;
 }
 
+static int versal_fpga_ops_write_sg(struct fpga_manager *mgr,
+				    struct sg_table *sgt)
+{
+	dma_addr_t dma_addr;
+	int ret;
+
+	dma_addr = sg_dma_address(sgt->sgl);
+	ret = zynqmp_pm_load_pdi(PDI_SRC_DDR, dma_addr);
+
+	return ret;
+}
+
 static int versal_fpga_ops_write(struct fpga_manager *mgr,
 				 const char *buf, size_t size)
 {
@@ -40,6 +52,7 @@ static int versal_fpga_ops_write(struct fpga_manager *mgr,
 static const struct fpga_manager_ops versal_fpga_ops = {
 	.write_init = versal_fpga_ops_write_init,
 	.write = versal_fpga_ops_write,
+	.write_sg = versal_fpga_ops_write_sg,
 };
 
 static int versal_fpga_probe(struct platform_device *pdev)
-- 
2.25.1