From f918cfc08c1755b9e54cd6effc923fa809045cf4 Mon Sep 17 00:00:00 2001 From: Ronak Jain Date: Wed, 6 Apr 2022 03:55:23 -0700 Subject: firmware: xilinx: add support for IOCTL and QUERY ID feature check Add support to check if IOCTL ID or QUERY ID is supported in firmware or not. Signed-off-by: Ronak Jain Link: https://lore.kernel.org/r/1649242526-17493-2-git-send-email-ronak.jain@xilinx.com Signed-off-by: Greg Kroah-Hartman --- drivers/firmware/xilinx/zynqmp.c | 62 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 61 insertions(+), 1 deletion(-) (limited to 'drivers/firmware/xilinx') diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index f21ece56695e..41ca41697790 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -36,8 +36,16 @@ /* BOOT_PIN_CTRL_MASK- out_val[11:8], out_en[3:0] */ #define CRL_APB_BOOTPIN_CTRL_MASK 0xF0FU +/* IOCTL/QUERY feature payload size */ +#define FEATURE_PAYLOAD_SIZE 2 + +/* Firmware feature check version mask */ +#define FIRMWARE_VERSION_MASK GENMASK(15, 0) + static bool feature_check_enabled; static DEFINE_HASHTABLE(pm_api_features_map, PM_API_FEATURE_CHECK_MAX_ORDER); +static u32 ioctl_features[FEATURE_PAYLOAD_SIZE]; +static u32 query_features[FEATURE_PAYLOAD_SIZE]; static struct platform_device *em_dev; @@ -168,7 +176,8 @@ static noinline int do_fw_call_hvc(u64 arg0, u64 arg1, u64 arg2, } /** - * zynqmp_pm_feature() - Check weather given feature is supported or not + * zynqmp_pm_feature() - Check whether given feature is supported or not and + * store supported IOCTL/QUERY ID mask * @api_id: API ID to check * * Return: Returns status, either success or error+reason @@ -208,10 +217,61 @@ int zynqmp_pm_feature(const u32 api_id) feature_data->feature_status = ret; hash_add(pm_api_features_map, &feature_data->hentry, api_id); + if (api_id == PM_IOCTL) + /* Store supported IOCTL IDs mask */ + memcpy(ioctl_features, &ret_payload[2], FEATURE_PAYLOAD_SIZE * 4); + else if (api_id == PM_QUERY_DATA) + /* Store supported QUERY IDs mask */ + memcpy(query_features, &ret_payload[2], FEATURE_PAYLOAD_SIZE * 4); + return ret; } EXPORT_SYMBOL_GPL(zynqmp_pm_feature); +/** + * zynqmp_pm_is_function_supported() - Check whether given IOCTL/QUERY function + * is supported or not + * @api_id: PM_IOCTL or PM_QUERY_DATA + * @id: IOCTL or QUERY function IDs + * + * Return: Returns status, either success or error+reason + */ +int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id) +{ + int ret; + u32 *bit_mask; + + /* Input arguments validation */ + if (id >= 64 || (api_id != PM_IOCTL && api_id != PM_QUERY_DATA)) + return -EINVAL; + + /* Check feature check API version */ + ret = zynqmp_pm_feature(PM_FEATURE_CHECK); + if (ret < 0) + return ret; + + /* Check if feature check version 2 is supported or not */ + if ((ret & FIRMWARE_VERSION_MASK) == PM_API_VERSION_2) { + /* + * Call feature check for IOCTL/QUERY API to get IOCTL ID or + * QUERY ID feature status. + */ + ret = zynqmp_pm_feature(api_id); + if (ret < 0) + return ret; + + bit_mask = (api_id == PM_IOCTL) ? ioctl_features : query_features; + + if ((bit_mask[(id / 32)] & BIT((id % 32))) == 0U) + return -EOPNOTSUPP; + } else { + return -ENODATA; + } + + return 0; +} +EXPORT_SYMBOL_GPL(zynqmp_pm_is_function_supported); + /** * zynqmp_pm_invoke_fn() - Invoke the system-level platform management layer * caller function depending on the configuration -- cgit v1.2.3