// SPDX-License-Identifier: GPL-2.0
/*
* Driver for HiSilicon PCIe tune and trace device
*
* Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
* Author: Yicong Yang <yangyicong@hisilicon.com>
*/
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/cpuhotplug.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/sysfs.h>
#include <linux/vmalloc.h>
#include "hisi_ptt.h"
/* Dynamic CPU hotplug state used by PTT */
static enum cpuhp_state hisi_ptt_pmu_online;
static bool hisi_ptt_wait_tuning_finish(struct hisi_ptt *hisi_ptt)
{
u32 val;
return !readl_poll_timeout(hisi_ptt->iobase + HISI_PTT_TUNING_INT_STAT,
val, !(val & HISI_PTT_TUNING_INT_STAT_MASK),
HISI_PTT_WAIT_POLL_INTERVAL_US,
HISI_PTT_WAIT_TUNE_TIMEOUT_US);
}
static ssize_t hisi_ptt_tune_attr_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct hisi_ptt *hisi_ptt = to_hisi_ptt(dev_get_drvdata(dev));
struct dev_ext_attribute *ext_attr;
struct hisi_ptt_tune_desc *desc;
u32 reg;
u16 val;
ext_attr = container_of(attr, struct dev_ext_attribute, attr);
desc = ext_attr->var;
mutex_lock(&hisi_ptt->tune_lock);
reg = readl(hisi_ptt->iobase + HISI_PTT_TUNING_CTRL);
reg &= ~(HISI_PTT_TUNING_CTRL_CODE | HISI_PTT_TUNING_CTRL_SUB);
reg |= FIELD_PREP(HISI_PTT_TUNING_CTRL_CODE | HISI_PTT_TUNING_CTRL_SUB,
desc->event_code);
writel(reg, hisi_ptt->iobase + HISI_PTT_TUNING_CTRL);
