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 */
work_handler(struct work_struct * work)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
adf_gen4_timer_start(struct adf_accel_dev * accel_dev)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
adf_gen4_timer_stop(struct adf_accel_dev * accel_dev)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