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_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 200 18 19 /* This periodic update is used to trigger HB, RL & TL fw events */ 20 static 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 39 int 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 } 57 EXPORT_SYMBOL_GPL(adf_gen4_timer_start); 58 59 void 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 } 71 EXPORT_SYMBOL_GPL(adf_gen4_timer_stop); 72