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Tue, 21 Jun 2022 02:29:01 -0700 From: Nava kishore Manne To: , , , , , , , , , , , , , , , , Subject: [PATCH v2 3/3] fpga: zynqmp-fpga: Adds status interface Date: Tue, 21 Jun 2022 14:58:33 +0530 Message-ID: <20220621092833.1057408-4-nava.manne@xilinx.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220621092833.1057408-1-nava.manne@xilinx.com> References: <20220621092833.1057408-1-nava.manne@xilinx.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: dd557fa9-1cb0-4d2b-a730-08da53687df4 X-MS-TrafficTypeDiagnostic: SA2PR02MB7772:EE_ X-Microsoft-Antispam-PRVS: X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:149.199.62.198;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:xsj-pvapexch01.xlnx.xilinx.com;PTR:unknown-62-198.xilinx.com;CAT:NONE;SFS:(13230016)(4636009)(376002)(136003)(396003)(39860400002)(346002)(46966006)(40470700004)(36840700001)(83380400001)(7636003)(47076005)(426003)(1076003)(336012)(921005)(82740400003)(356005)(6666004)(40480700001)(40460700003)(186003)(36860700001)(82310400005)(7696005)(70206006)(9786002)(26005)(110136005)(316002)(6636002)(478600001)(2906002)(2616005)(41300700001)(70586007)(8676002)(5660300002)(8936002)(36756003)(102446001)(83996005)(2101003);DIR:OUT;SFP:1101; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Adds status interface for zynqmp-fpga, It's a read only interface which allows the user to get the PL status. Usage: To read the PL configuration status cat /sys/class/fpga_manager//status Signed-off-by: Nava kishore Manne --- Changes for v2: - Updated status messages handling logic as suggested by Xu Yilun. drivers/fpga/zynqmp-fpga.c | 53 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/fpga/zynqmp-fpga.c b/drivers/fpga/zynqmp-fpga.c index c60f20949c47..e194bba91d3f 100644 --- a/drivers/fpga/zynqmp-fpga.c +++ b/drivers/fpga/zynqmp-fpga.c @@ -14,6 +14,19 @@ /* Constant Definitions */ #define IXR_FPGA_DONE_MASK BIT(3) +#define READ_DMA_SIZE 256U + +/* Error Register */ +#define IXR_FPGA_ERR_CRC_ERR BIT(0) +#define IXR_FPGA_ERR_SECURITY_ERR BIT(16) + +/* Signal Status Register. For details refer ug570 */ +#define IXR_FPGA_END_OF_STARTUP BIT(4) +#define IXR_FPGA_GST_CFG_B BIT(5) +#define IXR_FPGA_INIT_B_INTERNAL BIT(11) +#define IXR_FPGA_DONE_INTERNAL_SIGNAL BIT(13) + +#define IXR_FPGA_CONFIG_STAT_OFFSET 7U /** * struct zynqmp_fpga_priv - Private data structure @@ -77,8 +90,48 @@ static enum fpga_mgr_states zynqmp_fpga_ops_state(struct fpga_manager *mgr) return FPGA_MGR_STATE_UNKNOWN; } +static ssize_t zynqmp_fpga_ops_status(struct fpga_manager *mgr, char *buf) +{ + unsigned int *kbuf, reg_val; + dma_addr_t dma_addr; + ssize_t len = 0; + int ret; + + kbuf = dma_alloc_coherent(mgr->dev.parent, READ_DMA_SIZE, + &dma_addr, GFP_KERNEL); + if (!kbuf) + return -ENOMEM; + + ret = zynqmp_pm_fpga_read(IXR_FPGA_CONFIG_STAT_OFFSET, dma_addr, + PM_FPGA_READ_CONFIG_REG, ®_val); + if (ret) { + len += sprintf(buf + len, "firmware error\n"); + goto free_dmabuf; + } + + if (reg_val & IXR_FPGA_ERR_CRC_ERR) + len += sprintf(buf + len, "reconfig CRC error\n"); + if (reg_val & IXR_FPGA_ERR_SECURITY_ERR) + len += sprintf(buf + len, "reconfig security error\n"); + if (!(reg_val & IXR_FPGA_INIT_B_INTERNAL)) + len += sprintf(buf + len, "Device Initialization error\n"); + if (!(reg_val & IXR_FPGA_DONE_INTERNAL_SIGNAL)) + len += sprintf(buf + len, "Device internal signal error\n"); + if (!(reg_val & IXR_FPGA_GST_CFG_B)) + len += sprintf(buf + len, + "All I/Os are placed in High-Z state\n"); + if (!(reg_val & IXR_FPGA_END_OF_STARTUP)) + len += sprintf(buf + len, "Device sequence error\n"); + +free_dmabuf: + dma_free_coherent(mgr->dev.parent, READ_DMA_SIZE, buf, dma_addr); + + return len; +} + static const struct fpga_manager_ops zynqmp_fpga_ops = { .state = zynqmp_fpga_ops_state, + .status = zynqmp_fpga_ops_status, .write_init = zynqmp_fpga_ops_write_init, .write = zynqmp_fpga_ops_write, }; -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel