sugar/linux
1
0
Fork 0
Code Activity

firmware: xilinx: Add debugfs support for PM_GET_NODE_STATUS

Browse Source 
Add new debug interface to support PM_GET_NODE_STATUS to get the node
information like requirements and usage.

The debugfs firmware driver interface is only meant for testing and
debugging EEMI APIs. Hence, it is by-default disabled in production
systems.

Signed-off-by: Madhav Bhatt <madhav.bhatt@amd.com>
Link: https://lore.kernel.org/r/20250417094543.3873507-1-madhav.bhatt@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
This commit is contained in:
Madhav Bhatt
2025-04-17 02:45:43 -07:00
committed by Michal Simek
parent 8f5ae30d69
commit 548fe51740
3 changed files with 64 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/firmware/xilinx/zynqmp-debug.c
View File

@@ -3,6 +3,7 @@
* Xilinx Zynq MPSoC Firmware layer for debugfs APIs
*
* Copyright (C) 2014-2018 Xilinx, Inc.
* Copyright (C) 2022 - 2025 Advanced Micro Devices, Inc.
*
* Michal Simek <michal.simek@amd.com>
* Davorin Mista <davorin.mista@aggios.com>
@@ -38,6 +39,7 @@ static struct pm_api_info pm_api_list[] = {
PM_API(PM_RELEASE_NODE),
PM_API(PM_SET_REQUIREMENT),
PM_API(PM_GET_API_VERSION),
PM_API(PM_GET_NODE_STATUS),
PM_API(PM_REGISTER_NOTIFIER),
PM_API(PM_RESET_ASSERT),
PM_API(PM_RESET_GET_STATUS),
@@ -167,6 +169,17 @@ static int process_api_request(u32 pm_id, u64 *pm_api_arg, u32 *pm_api_ret)
pm_api_arg[3] ? pm_api_arg[3] :
ZYNQMP_PM_REQUEST_ACK_BLOCKING);
break;
case PM_GET_NODE_STATUS:
ret = zynqmp_pm_get_node_status(pm_api_arg[0],
&pm_api_ret[0],
&pm_api_ret[1],
&pm_api_ret[2]);
if (!ret)
sprintf(debugfs_buf,
"GET_NODE_STATUS:\n\tNodeId: %llu\n\tStatus: %u\n\tRequirements: %u\n\tUsage: %u\n",
pm_api_arg[0], pm_api_ret[0],
pm_api_ret[1], pm_api_ret[2]);
break;
case PM_REGISTER_NOTIFIER:
ret = zynqmp_pm_register_notifier(pm_api_arg[0],
pm_api_arg[1] ?

41
drivers/firmware/xilinx/zynqmp.c
View File

@@ -3,7 +3,7 @@
* Xilinx Zynq MPSoC Firmware layer
*
* Copyright (C) 2014-2022 Xilinx, Inc.
* Copyright (C) 2022 - 2024, Advanced Micro Devices, Inc.
* Copyright (C) 2022 - 2025 Advanced Micro Devices, Inc.
*
* Michal Simek <michal.simek@amd.com>
* Davorin Mista <davorin.mista@aggios.com>
@@ -1413,6 +1413,45 @@ int zynqmp_pm_set_tcm_config(u32 node_id, enum rpu_tcm_comb tcm_mode)
}
EXPORT_SYMBOL_GPL(zynqmp_pm_set_tcm_config);
/**
* zynqmp_pm_get_node_status - PM call to request a node's current power state
* @node: ID of the component or sub-system in question
* @status: Current operating state of the requested node
* @requirements: Current requirements asserted on the node,
* used for slave nodes only.
* @usage: Usage information, used for slave nodes only:
* PM_USAGE_NO_MASTER - No master is currently using
* the node
* PM_USAGE_CURRENT_MASTER - Only requesting master is
* currently using the node
* PM_USAGE_OTHER_MASTER - Only other masters are
* currently using the node
* PM_USAGE_BOTH_MASTERS - Both the current and at least
* one other master is currently
* using the node
*
* Return: Returns status, either success or error+reason
*/
int zynqmp_pm_get_node_status(const u32 node, u32 *const status,
u32 *const requirements, u32 *const usage)
{
u32 ret_payload[PAYLOAD_ARG_CNT];
int ret;
if (!status || !requirements || !usage)
return -EINVAL;
ret = zynqmp_pm_invoke_fn(PM_GET_NODE_STATUS, ret_payload, 1, node);
if (ret_payload[0] == XST_PM_SUCCESS) {
*status = ret_payload[1];
*requirements = ret_payload[2];
*usage = ret_payload[3];
}
return ret;
}
EXPORT_SYMBOL_GPL(zynqmp_pm_get_node_status);
/**
* zynqmp_pm_force_pwrdwn - PM call to request for another PU or subsystem to
* be powered down forcefully

12
include/linux/firmware/xlnx-zynqmp.h
View File

@@ -3,7 +3,7 @@
* Xilinx Zynq MPSoC Firmware layer
*
* Copyright (C) 2014-2021 Xilinx
* Copyright (C) 2022 - 2024, Advanced Micro Devices, Inc.
* Copyright (C) 2022 - 2025 Advanced Micro Devices, Inc.
*
* Michal Simek <michal.simek@amd.com>
* Davorin Mista <davorin.mista@aggios.com>
@@ -164,6 +164,7 @@ enum pm_api_cb_id {
enum pm_api_id {
PM_API_FEATURES = 0,
PM_GET_API_VERSION = 1,
PM_GET_NODE_STATUS = 3,
PM_REGISTER_NOTIFIER = 5,
PM_FORCE_POWERDOWN = 8,
PM_REQUEST_WAKEUP = 10,
@@ -629,6 +630,8 @@ int zynqmp_pm_request_wake(const u32 node,
int zynqmp_pm_get_rpu_mode(u32 node_id, enum rpu_oper_mode *rpu_mode);
int zynqmp_pm_set_rpu_mode(u32 node_id, enum rpu_oper_mode rpu_mode);
int zynqmp_pm_set_tcm_config(u32 node_id, enum rpu_tcm_comb tcm_mode);
int zynqmp_pm_get_node_status(const u32 node, u32 *const status,
u32 *const requirements, u32 *const usage);
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);
@@ -931,6 +934,13 @@ static inline int zynqmp_pm_set_tcm_config(u32 node_id, enum rpu_tcm_comb tcm_mo
return -ENODEV;
}
static inline int zynqmp_pm_get_node_status(const u32 node, u32 *const status,
u32 *const requirements,
u32 *const usage)
{
return -ENODEV;
}
static inline int zynqmp_pm_set_sd_config(u32 node,
enum pm_sd_config_type config,
u32 value)