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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
|
// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2014 - 2020 Intel Corporation */
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/completion.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_pfvf_pf_msg.h"
struct adf_fatal_error_data {
struct adf_accel_dev *accel_dev;
struct work_struct work;
};
static struct workqueue_struct *device_reset_wq;
static struct workqueue_struct *device_sriov_wq;
static pci_ers_result_t adf_error_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
dev_info(&pdev->dev, "Acceleration driver hardware error detected.\n");
if (!accel_dev) {
dev_err(&pdev->dev, "Can't find acceleration device\n");
return PCI_ERS_RESULT_DISCONNECT;
}
if (state == pci_channel_io_perm_failure) {
dev_err(&pdev->dev, "Can't recover from device error\n");
return PCI_ERS_RESULT_DISCONNECT;
}
set_bit(ADF_STATUS_RESTARTING, &accel_dev->status);
if (accel_dev->hw_device->exit_arb) {
dev_dbg(&pdev->dev, "Disabling arbitration\n");
accel_dev->hw_device->exit_arb(accel_dev);
}
adf_error_notifier(accel_dev);
adf_pf2vf_notify_fatal_error(accel_dev);
adf_dev_restarting_notify(accel_dev);
adf_pf2vf_notify_restarting(accel_dev);
adf_pf2vf_wait_for_restarting_complete(accel_dev);
pci_clear_master(pdev);
adf_dev_down(accel_dev, false);
return PCI_ERS_RESULT_NEED_RESET;
}
/* reset dev data */
struct adf_reset_dev_data {
int mode;
struct adf_accel_dev *accel_dev;
struct completion compl;
struct work_struct reset_work;
};
/* sriov dev data */
struct adf_sriov_dev_data {
struct adf_accel_dev *accel_dev;
struct completion compl;
struct work_struct sriov_work;
};
void adf_reset_sbr(struct adf_accel_dev *accel_dev)
{
struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
struct pci_dev *parent = pdev->bus->self;
u16 bridge_ctl = 0;
if (!parent)
parent = pdev;
if (!pci_wait_for_pending_transaction(pdev))
dev_info(&GET_DEV(accel_dev),
"Transaction still in progress. Proceeding\n");
dev_info(&GET_DEV(accel_dev), "Secondary bus reset\n");
pci_read_config_word(parent, PCI_BRIDGE_CONTROL, &bridge_ctl);
bridge_ctl |= PCI_BRIDGE_CTL_BUS_RESET;
pci_write_config_word(parent, PCI_BRIDGE_CONTROL, bridge_ctl);
msleep(100);
bridge_ctl &= ~PCI_BRIDGE_CTL_BUS_RESET;
pci_write_config_word(parent, PCI_BRIDGE_CONTROL, bridge_ctl);
msleep(100);
}
EXPORT_SYMBOL_GPL(adf_reset_sbr);
void adf_reset_flr(struct adf_accel_dev *accel_dev)
{
pcie_flr(accel_to_pci_dev(accel_dev));
}
EXPORT_SYMBOL_GPL(adf_reset_flr);
void adf_dev_restore(struct adf_accel_dev *accel_dev)
{
struct adf_hw_device_data *hw_device = accel_dev->hw_device;
struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
if (hw_device->reset_device) {
dev_info(&GET_DEV(accel_dev), "Resetting device qat_dev%d\n",
accel_dev->accel_id);
hw_device->reset_device(accel_dev);
pci_restore_state(pdev);
pci_save_state(pdev);
}
}
static void adf_device_sriov_worker(struct work_struct *work)
{
struct adf_sriov_dev_data *sriov_data =
container_of(work, struct adf_sriov_dev_data, sriov_work);
adf_reenable_sriov(sriov_data->accel_dev);
complete(&sriov_data->compl);
}
static void adf_device_reset_worker(struct work_struct *work)
{
struct adf_reset_dev_data *reset_data =
container_of(work, struct adf_reset_dev_data, reset_work);
struct adf_accel_dev *accel_dev = reset_data->accel_dev;
unsigned long wait_jiffies = msecs_to_jiffies(10000);
struct adf_sriov_dev_data sriov_data;
adf_dev_restarting_notify(accel_dev);
if (adf_dev_restart(accel_dev)) {
/* The device hanged and we can't restart it so stop here */
dev_err(&GET_DEV(accel_dev), "Restart device failed\n");
if (reset_data->mode == ADF_DEV_RESET_ASYNC)
kfree(reset_data);
WARN(1, "QAT: device restart failed. Device is unusable\n");
return;
}
sriov_data.accel_dev = accel_dev;
init_completion(&sriov_data.compl);
INIT_WORK(&sriov_data.sriov_work, adf_device_sriov_worker);
queue_work(device_sriov_wq, &sriov_data.sriov_work);
if (wait_for_completion_timeout(&sriov_data.compl, wait_jiffies))
adf_pf2vf_notify_restarted(accel_dev);
adf_dev_restarted_notify(accel_dev);
clear_bit(ADF_STATUS_RESTARTING, &accel_dev->status);
/* The dev is back alive. Notify the caller if in sync mode */
if (reset_data->mode == ADF_DEV_RESET_SYNC)
complete(&reset_data->compl);
else
kfree(reset_data);
}
static int adf_dev_aer_schedule_reset(struct adf_accel_dev *accel_dev,
enum adf_dev_reset_mode mode)
{
struct adf_reset_dev_data *reset_data;
if (!adf_dev_started(accel_dev) ||
test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
return 0;
set_bit(ADF_STATUS_RESTARTING, &accel_dev->status);
reset_data = kzalloc(sizeof(*reset_data), GFP_KERNEL);
if (!reset_data)
return -ENOMEM;
reset_data->accel_dev = accel_dev;
init_completion(&reset_data->compl);
reset_data->mode = mode;
INIT_WORK(&reset_data->reset_work, adf_device_reset_worker);
queue_work(device_reset_wq, &reset_data->reset_work);
/* If in sync mode wait for the result */
if (mode == ADF_DEV_RESET_SYNC) {
int ret = 0;
/* Maximum device reset time is 10 seconds */
unsigned long wait_jiffies = msecs_to_jiffies(10000);
unsigned long timeout = wait_for_completion_timeout(
&reset_data->compl, wait_jiffies);
if (!timeout) {
dev_err(&GET_DEV(accel_dev),
"Reset device timeout expired\n");
ret = -EFAULT;
}
kfree(reset_data);
return ret;
}
return 0;
}
static pci_ers_result_t adf_slot_reset(struct pci_dev *pdev)
{
struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
int res = 0;
if (!accel_dev) {
pr_err("QAT: Can't find acceleration device\n");
return PCI_ERS_RESULT_DISCONNECT;
}
if (!pdev->is_busmaster)
pci_set_master(pdev);
pci_restore_state(pdev);
pci_save_state(pdev);
res = adf_dev_up(accel_dev, false);
if (res && res != -EALREADY)
return PCI_ERS_RESULT_DISCONNECT;
adf_reenable_sriov(accel_dev);
adf_pf2vf_notify_restarted(accel_dev);
adf_dev_restarted_notify(accel_dev);
clear_bit(ADF_STATUS_RESTARTING, &accel_dev->status);
return PCI_ERS_RESULT_RECOVERED;
}
static void adf_resume(struct pci_dev *pdev)
{
dev_info(&pdev->dev, "Acceleration driver reset completed\n");
dev_info(&pdev->dev, "Device is up and running\n");
}
const struct pci_error_handlers adf_err_handler = {
.error_detected = adf_error_detected,
.slot_reset = adf_slot_reset,
.resume = adf_resume,
};
EXPORT_SYMBOL_GPL(adf_err_handler);
int adf_dev_autoreset(struct adf_accel_dev *accel_dev)
{
if (accel_dev->autoreset_on_error)
return adf_dev_aer_schedule_reset(accel_dev, ADF_DEV_RESET_ASYNC);
return 0;
}
static void adf_notify_fatal_error_worker(struct work_struct *work)
{
struct adf_fatal_error_data *wq_data =
container_of(work, struct adf_fatal_error_data, work);
struct adf_accel_dev *accel_dev = wq_data->accel_dev;
struct adf_hw_device_data *hw_device = accel_dev->hw_device;
adf_error_notifier(accel_dev);
if (!accel_dev->is_vf) {
/* Disable arbitration to stop processing of new requests */
if (accel_dev->autoreset_on_error && hw_device->exit_arb)
hw_device->exit_arb(accel_dev);
if (accel_dev->pf.vf_info)
adf_pf2vf_notify_fatal_error(accel_dev);
adf_dev_autoreset(accel_dev);
}
kfree(wq_data);
}
int adf_notify_fatal_error(struct adf_accel_dev *accel_dev)
{
struct adf_fatal_error_data *wq_data;
wq_data = kzalloc(sizeof(*wq_data), GFP_ATOMIC);
if (!wq_data)
return -ENOMEM;
wq_data->accel_dev = accel_dev;
INIT_WORK(&wq_data->work, adf_notify_fatal_error_worker);
adf_misc_wq_queue_work(&wq_data->work);
return 0;
}
int adf_init_aer(void)
{
device_reset_wq = alloc_workqueue("qat_device_reset_wq",
WQ_MEM_RECLAIM, 0);
if (!device_reset_wq)
return -EFAULT;
device_sriov_wq = alloc_workqueue("qat_device_sriov_wq", 0, 0);
if (!device_sriov_wq)
return -EFAULT;
return 0;
}
void adf_exit_aer(void)
{
if (device_reset_wq)
destroy_workqueue(device_reset_wq);
device_reset_wq = NULL;
if (device_sriov_wq)
destroy_workqueue(device_sriov_wq);
device_sriov_wq = NULL;
}
|
