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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Dec 2022 11:58:58.1167 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4164b4a9-1c52-4a53-3021-08dae4dd12e5 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: CY4PEPF0000C96D.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB8137 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221223_035909_037481_C314CCCC X-CRM114-Status: GOOD ( 14.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Adds PM API for performing Programmable Logic(PL) configuration register readback. It provides an interface to the firmware(pmufw) to readback the FPGA configuration register. Signed-off-by: Nava kishore Manne --- changes for v2: - None. Changes for v3: - Updated API and config reg read-back handling logic - Updated the commit msg to align with the changes. Changes for v4: - Fix some minor coding issues. No functional changes. - Updated Return value comments as suggested by Xu Yilun. drivers/firmware/xilinx/zynqmp.c | 33 ++++++++++++++++++++++++++++ include/linux/firmware/xlnx-zynqmp.h | 10 +++++++++ 2 files changed, 43 insertions(+) diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index ff5cabe70a2b..ca954e1119b5 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -941,6 +941,39 @@ int zynqmp_pm_fpga_get_status(u32 *value) } EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status); +/** + * zynqmp_pm_fpga_get_config_status - Get the FPGA configuration status. + * @value: Buffer to store FPGA configuration status. + * + * This function provides access to the pmufw to get the FPGA configuration + * status + * + * Return: 0 on success, a negative value on error + */ +int zynqmp_pm_fpga_get_config_status(u32 *value) +{ + u32 buf, phys_lower_addr, phys_upper_addr; + u32 ret_payload[PAYLOAD_ARG_CNT]; + int ret; + + if (!value) + return -EINVAL; + + phys_lower_addr = lower_32_bits((u64)&buf); + phys_upper_addr = upper_32_bits((u64)&buf); + + ret = zynqmp_pm_invoke_fn(PM_FPGA_READ, + XILINX_ZYNQMP_PM_FPGA_CONFIG_STAT_OFFSET, + phys_lower_addr, phys_upper_addr, + XILINX_ZYNQMP_PM_FPGA_READ_CONFIG_REG, + ret_payload); + + *value = ret_payload[1]; + + return ret; +} +EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_config_status); + /** * zynqmp_pm_pinctrl_request - Request Pin from firmware * @pin: Pin number to request diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h index 76d2b3ebad84..29e8964f4297 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -70,6 +70,10 @@ #define XILINX_ZYNQMP_PM_FPGA_FULL 0x0U #define XILINX_ZYNQMP_PM_FPGA_PARTIAL BIT(0) +/* FPGA Status Reg */ +#define XILINX_ZYNQMP_PM_FPGA_CONFIG_STAT_OFFSET 7U +#define XILINX_ZYNQMP_PM_FPGA_READ_CONFIG_REG 0U + /* * Node IDs for the Error Events. */ @@ -117,6 +121,7 @@ enum pm_api_id { PM_CLOCK_GETRATE = 42, PM_CLOCK_SETPARENT = 43, PM_CLOCK_GETPARENT = 44, + PM_FPGA_READ = 46, PM_SECURE_AES = 47, PM_FEATURE_CHECK = 63, }; @@ -505,6 +510,7 @@ int zynqmp_pm_register_sgi(u32 sgi_num, u32 reset); int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value); int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config, u32 value); +int zynqmp_pm_fpga_get_config_status(u32 *value); #else static inline int zynqmp_pm_get_api_version(u32 *version) { @@ -790,6 +796,10 @@ static inline int zynqmp_pm_set_gem_config(u32 node, return -ENODEV; } +static inline int zynqmp_pm_fpga_get_config_status(u32 *value) +{ + return -ENODEV; +} #endif #endif /* __FIRMWARE_ZYNQMP_H__ */