1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 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_accel_devices.h" 13 #include "adf_common_drv.h" 14 #include "adf_gen4_timer.h" 15 16 #define ADF_GEN4_TIMER_PERIOD_MS 200 17 18 /* This periodic update is used to trigger HB, RL & TL fw events */ 19 static void work_handler(struct work_struct *work) 20 { 21 struct adf_accel_dev *accel_dev; 22 struct adf_timer *timer_ctx; 23 u32 time_periods; 24 25 timer_ctx = container_of(to_delayed_work(work), struct adf_timer, work_ctx); 26 accel_dev = timer_ctx->accel_dev; 27 28 adf_misc_wq_queue_delayed_work(&timer_ctx->work_ctx, 29 msecs_to_jiffies(ADF_GEN4_TIMER_PERIOD_MS)); 30 31 time_periods = div_u64(ktime_ms_delta(ktime_get_real(), timer_ctx->initial_ktime), 32 ADF_GEN4_TIMER_PERIOD_MS); 33 34 if (adf_send_admin_tim_sync(accel_dev, time_periods)) 35 dev_err(&GET_DEV(accel_dev), "Failed to synchronize qat timer\n"); 36 } 37 38 int adf_gen4_timer_start(struct adf_accel_dev *accel_dev) 39 { 40 struct adf_timer *timer_ctx; 41 42 timer_ctx = kzalloc(sizeof(*timer_ctx), GFP_KERNEL); 43 if (!timer_ctx) 44 return -ENOMEM; 45 46 timer_ctx->accel_dev = accel_dev; 47 accel_dev->timer = timer_ctx; 48 timer_ctx->initial_ktime = ktime_get_real(); 49 50 INIT_DELAYED_WORK(&timer_ctx->work_ctx, work_handler); 51 adf_misc_wq_queue_delayed_work(&timer_ctx->work_ctx, 52 msecs_to_jiffies(ADF_GEN4_TIMER_PERIOD_MS)); 53 54 return 0; 55 } 56 EXPORT_SYMBOL_GPL(adf_gen4_timer_start); 57 58 void adf_gen4_timer_stop(struct adf_accel_dev *accel_dev) 59 { 60 struct adf_timer *timer_ctx = accel_dev->timer; 61 62 if (!timer_ctx) 63 return; 64 65 cancel_delayed_work_sync(&timer_ctx->work_ctx); 66 67 kfree(timer_ctx); 68 accel_dev->timer = NULL; 69 } 70 EXPORT_SYMBOL_GPL(adf_gen4_timer_stop); 71