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1// SPDX-License-Identifier: GPL-2.0-only2/* Copyright(c) 2023 Intel Corporation */3 4#include <linux/container_of.h>5#include <linux/dev_printk.h>6#include <linux/export.h>7#include <linux/jiffies.h>8#include <linux/ktime.h>9#include <linux/slab.h>10#include <linux/workqueue.h>11 12#include "adf_admin.h"13#include "adf_accel_devices.h"14#include "adf_common_drv.h"15#include "adf_gen4_timer.h"16 17#define ADF_GEN4_TIMER_PERIOD_MS 20018 19/* This periodic update is used to trigger HB, RL & TL fw events */20static void work_handler(struct work_struct *work)21{22 struct adf_accel_dev *accel_dev;23 struct adf_timer *timer_ctx;24 u32 time_periods;25 26 timer_ctx = container_of(to_delayed_work(work), struct adf_timer, work_ctx);27 accel_dev = timer_ctx->accel_dev;28 29 adf_misc_wq_queue_delayed_work(&timer_ctx->work_ctx,30 msecs_to_jiffies(ADF_GEN4_TIMER_PERIOD_MS));31 32 time_periods = div_u64(ktime_ms_delta(ktime_get_real(), timer_ctx->initial_ktime),33 ADF_GEN4_TIMER_PERIOD_MS);34 35 if (adf_send_admin_tim_sync(accel_dev, time_periods))36 dev_err(&GET_DEV(accel_dev), "Failed to synchronize qat timer\n");37}38 39int adf_gen4_timer_start(struct adf_accel_dev *accel_dev)40{41 struct adf_timer *timer_ctx;42 43 timer_ctx = kzalloc(sizeof(*timer_ctx), GFP_KERNEL);44 if (!timer_ctx)45 return -ENOMEM;46 47 timer_ctx->accel_dev = accel_dev;48 accel_dev->timer = timer_ctx;49 timer_ctx->initial_ktime = ktime_get_real();50 51 INIT_DELAYED_WORK(&timer_ctx->work_ctx, work_handler);52 adf_misc_wq_queue_delayed_work(&timer_ctx->work_ctx,53 msecs_to_jiffies(ADF_GEN4_TIMER_PERIOD_MS));54 55 return 0;56}57EXPORT_SYMBOL_GPL(adf_gen4_timer_start);58 59void adf_gen4_timer_stop(struct adf_accel_dev *accel_dev)60{61 struct adf_timer *timer_ctx = accel_dev->timer;62 63 if (!timer_ctx)64 return;65 66 cancel_delayed_work_sync(&timer_ctx->work_ctx);67 68 kfree(timer_ctx);69 accel_dev->timer = NULL;70}71EXPORT_SYMBOL_GPL(adf_gen4_timer_stop);72