blob: a3b474bdef6c832f8ae10f03e64d7c0f9ffdcd02 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2023 Intel Corporation */
#include <linux/random.h>
#include "adf_admin.h"
#include "adf_common_drv.h"
#include "adf_heartbeat.h"
#define MAX_HB_TICKS 0xFFFFFFFF
static int adf_hb_set_timer_to_max(struct adf_accel_dev *accel_dev)
{
struct adf_hw_device_data *hw_data = accel_dev->hw_device;
accel_dev->heartbeat->hb_timer = 0;
if (hw_data->stop_timer)
hw_data->stop_timer(accel_dev);
return adf_send_admin_hb_timer(accel_dev, MAX_HB_TICKS);
}
static void adf_set_hb_counters_fail(struct adf_accel_dev *accel_dev, u32 ae,
u32 thr)
{
struct hb_cnt_pair *stats = accel_dev->heartbeat->dma.virt_addr;
struct adf_hw_device_data *hw_device = accel_dev->hw_device;
const size_t max_aes = hw_device->get_num_aes(hw_device);
const size_t hb_ctrs = hw_device->num_hb_ctrs;
size_t thr_id = ae * hb_ctrs + thr;
u16 num_rsp = stats[thr_id].resp_heartbeat_cnt;
/*
* Inject live.req != live.rsp and live.rsp == last.rsp
* to trigger the heartbeat error detection
*/
stats[thr_id].req_heartbeat_cnt++;
stats += (max_aes * hb_ctrs);
stats[thr_id].resp_heartbeat_cnt = num_rsp;
}
int adf_heartbeat_inject_error(struct adf_accel_dev *accel_dev)
{
struct adf_hw_device_data *hw_device = accel_dev->hw_device;
const size_t max_aes = hw_device->get_num_aes(hw_device);
const size_t hb_ctrs = hw_device->num_hb_ctrs;
u32 rand, rand_ae, rand_thr;
unsigned long ae_mask;
int ret;
ae_mask = hw_device->ae_mask;
do {
/* Ensure we have a valid ae */
get_random_bytes(&rand, sizeof(rand));
rand_ae = rand % max_aes;
} while (!test_bit(rand_ae, &ae_mask));
get_random_bytes(&rand, sizeof(rand));
rand_thr = rand % hb_ctrs;
/* Increase the heartbeat timer to prevent FW updating HB counters */
ret = adf_hb_set_timer_to_max(accel_dev);
if (ret)
return ret;
/* Configure worker threads to stop processing any packet */
ret = adf_disable_arb_thd(accel_dev, rand_ae, rand_thr);
if (ret)
return ret;
/* Change HB counters memory to simulate a hang */
adf_set_hb_counters_fail(accel_dev, rand_ae, rand_thr);
return 0;
}
|
