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firmware: xilinx: add support for IOCTL and QUERY ID feature check

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Add support to check if IOCTL ID or QUERY ID is supported in firmware
or not.

Signed-off-by: Ronak Jain <ronak.jain@xilinx.com>
Link: https://lore.kernel.org/r/1649242526-17493-2-git-send-email-ronak.jain@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ronak Jain 2022-04-06 03:55:23 -07:00 committed by Greg Kroah-Hartman
parent d8a54d2e42
commit f918cfc08c
2 changed files with 72 additions and 1 deletions
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62
drivers/firmware/xilinx/zynqmp.c
View file

@ -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

11
include/linux/firmware/xlnx-zynqmp.h
View file

@ -29,6 +29,11 @@
/* SMC SIP service Call Function Identifier Prefix */
#define PM_SIP_SVC 0xC2000000
/* PM API versions */
#define PM_API_VERSION_2 2
/* ATF only commands */
#define PM_GET_TRUSTZONE_VERSION 0xa03
#define PM_SET_SUSPEND_MODE 0xa02
#define GET_CALLBACK_DATA 0xa01
@ -460,6 +465,7 @@ int zynqmp_pm_load_pdi(const u32 src, const u64 address);
int zynqmp_pm_register_notifier(const u32 node, const u32 event,
const u32 wake, const u32 enable);
int zynqmp_pm_feature(const u32 api_id);
int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id);
int zynqmp_pm_set_feature_config(enum pm_feature_config_id id, u32 value);
int zynqmp_pm_get_feature_config(enum pm_feature_config_id id, u32 *payload);
#else
@ -678,6 +684,11 @@ static inline int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id)
return -ENODEV;
}
static inline int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id)
{
return -ENODEV;
}
static inline int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id)
{
return -ENODEV;