Contributors: 5
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Damian Muszynski |
263 |
80.92% |
4 |
33.33% |
| Tadeusz Struk |
56 |
17.23% |
5 |
41.67% |
| Giovanni Cabiddu |
3 |
0.92% |
1 |
8.33% |
| Wojciech Ziemba |
2 |
0.62% |
1 |
8.33% |
| Shashank Gupta |
1 |
0.31% |
1 |
8.33% |
| Total |
325 |
|
12 |
|
// 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;
}