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tegra: hwpm: Linux: IOCTL for Credit Programming

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- Add IOCTL infra for Credit programming in Linux based
OSs.

Bug 4571175

Signed-off-by: vasukis <vasukis@nvidia.com>
Change-Id: I1a5ff5aefcf8da6ad85507d71c0a9bd3b7f31f6d
Reviewed-on: https://git-master.nvidia.com/r/c/linux-hwpm/+/3136565
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Seema Khowala <seemaj@nvidia.com>
This commit is contained in:
vasukis
2024-05-13 19:00:50 +00:00
committed by mobile promotions
parent b5f2672134
commit 5d80b2edb5
4 changed files with 107 additions and 3 deletions
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21
drivers/tegra/hwpm/os/linux/ioctl.c
View File

@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2021-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-FileCopyrightText: Copyright (c) 2021-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -247,6 +247,21 @@ static int tegra_hwpm_update_get_put_ioctl(struct tegra_soc_hwpm *hwpm,
return tegra_hwpm_update_mem_bytes(hwpm, update_get_put);
}
static int tegra_hwpm_credit_program_ioctl(struct tegra_soc_hwpm *hwpm,
struct tegra_soc_hwpm_exec_credit_program *credit_info)
{
tegra_hwpm_fn(hwpm, " ");
if (!hwpm->bind_completed) {
tegra_hwpm_err(hwpm,
"The Credit Programming can be called only"
" after completion of BIND IOCTL");
return -EPERM;
}
return tegra_hwpm_credit_program(hwpm, credit_info);
}
static long tegra_hwpm_ioctl(struct file *file,
unsigned int cmd,
unsigned long arg)
@@ -337,6 +352,10 @@ static long tegra_hwpm_ioctl(struct file *file,
ret = tegra_hwpm_update_get_put_ioctl(hwpm,
(struct tegra_soc_hwpm_update_get_put *)buf);
break;
case TEGRA_CTRL_CMD_SOC_HWPM_CREDIT_PROGRAM:
ret = tegra_hwpm_credit_program_ioctl(hwpm,
(struct tegra_soc_hwpm_exec_credit_program *)buf);
break;
default:
tegra_hwpm_err(hwpm, "Unknown IOCTL command");
ret = -ENOTTY;

31
drivers/tegra/hwpm/os/linux/regops_utils.c
View File

@@ -21,6 +21,7 @@
#include <tegra_hwpm_log.h>
#include <tegra_hwpm_common.h>
#include <tegra_hwpm_static_analysis.h>
#include <os/linux/driver.h>
#include <os/linux/regops_utils.h>
static int tegra_hwpm_exec_reg_ops(struct tegra_soc_hwpm *hwpm,
@@ -228,3 +229,33 @@ int tegra_hwpm_exec_regops(struct tegra_soc_hwpm *hwpm,
return 0;
}
int tegra_hwpm_credit_program(struct tegra_soc_hwpm *hwpm,
struct tegra_soc_hwpm_exec_credit_program *credit_prog)
{
int idx = 0, ret = 0;
struct tegra_soc_hwpm_credits_info *creditInfo = NULL;
tegra_hwpm_fn(hwpm, " ");
/* Check if credit_programming is defined for this chip*/
if (hwpm->active_chip->credit_program == NULL) {
tegra_hwpm_err(hwpm, "Credit programming not defined");
return -EINVAL;
}
for (idx = 0; idx <= credit_prog->num_entries; idx++) {
//Extract the credit_info pointer for a given Credit packet.
//This contains the num_credits param
//which has to be updated in chip specific HALs.
creditInfo = &(credit_prog->credit_info[idx]);
/* Call chip specific credit programming API */
ret = hwpm->active_chip->credit_program(
hwpm, &(creditInfo->num_credits),
creditInfo->cblock_idx, credit_prog->pma_channel_idx,
credit_prog->credit_cmd);
}
return ret;
}

7
drivers/tegra/hwpm/os/linux/regops_utils.h
View File

@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2022-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-FileCopyrightText: Copyright (c) 2022-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -19,8 +19,11 @@
struct tegra_soc_hwpm;
struct tegra_soc_hwpm_exec_reg_ops;
struct tegra_soc_hwpm_exec_credit_program;
int tegra_hwpm_exec_regops(struct tegra_soc_hwpm *hwpm,
struct tegra_soc_hwpm_exec_reg_ops *exec_reg_ops);
int tegra_hwpm_credit_program(struct tegra_soc_hwpm *hwpm,
struct tegra_soc_hwpm_exec_credit_program *credit_prog);
#endif /* TEGRA_HWPM_OS_LINUX_REGOPS_UTILS_H */

51
include/uapi/linux/tegra-soc-hwpm-uapi.h
View File

@@ -166,6 +166,45 @@ struct tegra_soc_hwpm_reserve_resource {
enum tegra_soc_hwpm_resource resource;
};
/* Enum for Credit programming states */
enum tegra_soc_hwpm_credit_cmd {
TEGRA_SOC_HWPM_CMD_SET_HS_CREDITS,
TEGRA_SOC_HWPM_CMD_GET_HS_CREDITS,
TEGRA_SOC_HWPM_CMD_GET_TOTAL_HS_CREDITS,
TEGRA_SOC_HWPM_CMD_GET_CHIPLET_HS_CREDITS_POOL,
TEGRA_SOC_HWPM_CMD_GET_HS_CREDITS_MAPPING
};
struct tegra_soc_hwpm_credits_info {
/*
* Input
*/
__u8 cblock_idx; /* Cblock ID */
/*
* Input/Output
*/
__u32 num_credits; /* Number of credits per chiplet */
};
#define TEGRA_SOC_HWPM_MAX_CREDIT_INFO_ENTRIES 8
/* TEGRA_CTRL_CMD_SOC_HWPM_CREDIT_PROGRAM */
struct tegra_soc_hwpm_exec_credit_program {
/*
* Inputs
*/
__u16 credit_cmd; /* enum tegra_soc_hwpm_credit_cmd */
__u8 pma_channel_idx; /* For multi-channel support */
__u8 num_entries;
struct tegra_soc_hwpm_credits_info credit_info[TEGRA_SOC_HWPM_MAX_CREDIT_INFO_ENTRIES];
/*
* Output
*/
__u8 status_info; /* Return the status. To be used for future use*/
};
/* TEGRA_CTRL_CMD_SOC_HWPM_ALLOC_PMA_STREAM IOCTL */
struct tegra_soc_hwpm_alloc_pma_stream {
/*
@@ -324,6 +363,7 @@ enum tegra_soc_hwpm_ioctl_num {
TEGRA_SOC_HWPM_IOCTL_QUERY_ALLOWLIST,
TEGRA_SOC_HWPM_IOCTL_EXEC_REG_OPS,
TEGRA_SOC_HWPM_IOCTL_UPDATE_GET_PUT,
TEGRA_SOC_HWPM_IOCTL_CREDIT_PROGRAM,
TERGA_SOC_HWPM_NUM_IOCTLS
};
@@ -428,6 +468,17 @@ enum tegra_soc_hwpm_ioctl_num {
TEGRA_SOC_HWPM_IOCTL_UPDATE_GET_PUT, \
struct tegra_soc_hwpm_update_get_put)
/*
* IOCTl for initiating Credit Programming
*
* This IOCTL executes read-write access to SECURE REGISTERS
*
*/
#define TEGRA_CTRL_CMD_SOC_HWPM_CREDIT_PROGRAM \
_IOWR(TEGRA_SOC_HWPM_IOC_MAGIC, \
TEGRA_SOC_HWPM_IOCTL_CREDIT_PROGRAM, \
struct tegra_soc_hwpm_exec_credit_program)
#define TEGRA_SOC_HWPM_MAX_ARG_SIZE \
sizeof(struct tegra_soc_hwpm_exec_reg_ops)