mirror of
https://github.com/torvalds/linux.git
synced 2026-09-24 06:24:02 +02:00
48ad55cda0
Implement IOCTL interface for SB-TSI driver to enable userspace access to TSI register read/write operations through the AMD Advanced Platform Management Link (APML) protocol. Add an ioctl command (SBTSI_IOCTL_REG_XFER_CMD) that accepts a register address, data byte, and direction flag. The mutex is taken on the ioctl path here; the hwmon path is placed under the same lock in the next patch, which completes serialization between the hwmon and ioctl paths. Reviewed-by: Akshay Gupta <Akshay.Gupta@amd.com> Signed-off-by: Prathima <Prathima.Lk@amd.com> Link: https://patch.msgid.link/20260710111642.850022-7-Akshay.Gupta@amd.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
30 lines
799 B
C
30 lines
799 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* AMD SBTSI core driver private definitions.
|
|
*
|
|
* Copyright (C) 2026 Advanced Micro Devices, Inc.
|
|
*/
|
|
|
|
#ifndef _LINUX_TSI_CORE_H_
|
|
#define _LINUX_TSI_CORE_H_
|
|
|
|
#include <linux/cache.h>
|
|
#include <linux/misc/tsi.h>
|
|
|
|
/**
|
|
* struct sbtsi_i3c_priv - per-device state for I3C SBTSI (includes DMA-safe buffers)
|
|
* @data: public device state exposed via dev_set_drvdata()
|
|
* @tx: outgoing I3C bytes (DMA_TO_DEVICE); [0] register address, [1] value
|
|
* @rx: incoming I3C data byte (DMA_FROM_DEVICE)
|
|
*/
|
|
struct sbtsi_i3c_priv {
|
|
struct sbtsi_data data;
|
|
u8 tx[2];
|
|
u8 rx __aligned(ARCH_DMA_MINALIGN);
|
|
};
|
|
|
|
int create_misc_tsi_device(struct sbtsi_data *data, struct device *dev);
|
|
|
|
void sbtsi_data_release(struct kref *kref);
|
|
#endif /* _LINUX_TSI_CORE_H_ */
|