1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
2 /* Copyright(c) 2014 - 2020 Intel Corporation */
3 #include <linux/mutex.h>
4 #include <linux/list.h>
5 #include <linux/bitops.h>
6 #include <linux/delay.h>
7 #include "adf_accel_devices.h"
8 #include "adf_cfg.h"
9 #include "adf_common_drv.h"
10
11 static LIST_HEAD(service_table);
12 static DEFINE_MUTEX(service_lock);
13
adf_service_add(struct service_hndl * service)14 static void adf_service_add(struct service_hndl *service)
15 {
16 mutex_lock(&service_lock);
17 list_add(&service->list, &service_table);
18 mutex_unlock(&service_lock);
19 }
20
adf_service_register(struct service_hndl * service)21 int adf_service_register(struct service_hndl *service)
22 {
23 memset(service->init_status, 0, sizeof(service->init_status));
24 memset(service->start_status, 0, sizeof(service->start_status));
25 adf_service_add(service);
26 return 0;
27 }
28
adf_service_remove(struct service_hndl * service)29 static void adf_service_remove(struct service_hndl *service)
30 {
31 mutex_lock(&service_lock);
32 list_del(&service->list);
33 mutex_unlock(&service_lock);
34 }
35
adf_service_unregister(struct service_hndl * service)36 int adf_service_unregister(struct service_hndl *service)
37 {
38 int i;
39
40 for (i = 0; i < ARRAY_SIZE(service->init_status); i++) {
41 if (service->init_status[i] || service->start_status[i]) {
42 pr_err("QAT: Could not remove active service\n");
43 return -EFAULT;
44 }
45 }
46 adf_service_remove(service);
47 return 0;
48 }
49
50 /**
51 * adf_dev_init() - Init data structures and services for the given accel device
52 * @accel_dev: Pointer to acceleration device.
53 *
54 * Initialize the ring data structures and the admin comms and arbitration
55 * services.
56 *
57 * Return: 0 on success, error code otherwise.
58 */
adf_dev_init(struct adf_accel_dev * accel_dev)59 int adf_dev_init(struct adf_accel_dev *accel_dev)
60 {
61 struct service_hndl *service;
62 struct list_head *list_itr;
63 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
64 int ret;
65
66 if (!hw_data) {
67 dev_err(&GET_DEV(accel_dev),
68 "Failed to init device - hw_data not set\n");
69 return -EFAULT;
70 }
71
72 if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status)) {
73 dev_err(&GET_DEV(accel_dev), "Device not configured\n");
74 return -EFAULT;
75 }
76
77 if (adf_init_etr_data(accel_dev)) {
78 dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
79 return -EFAULT;
80 }
81
82 if (hw_data->init_device && hw_data->init_device(accel_dev)) {
83 dev_err(&GET_DEV(accel_dev), "Failed to initialize device\n");
84 return -EFAULT;
85 }
86
87 if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
88 dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
89 return -EFAULT;
90 }
91
92 if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
93 dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
94 return -EFAULT;
95 }
96
97 if (adf_ae_init(accel_dev)) {
98 dev_err(&GET_DEV(accel_dev),
99 "Failed to initialise Acceleration Engine\n");
100 return -EFAULT;
101 }
102 set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);
103
104 if (adf_ae_fw_load(accel_dev)) {
105 dev_err(&GET_DEV(accel_dev),
106 "Failed to load acceleration FW\n");
107 return -EFAULT;
108 }
109 set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
110
111 if (hw_data->alloc_irq(accel_dev)) {
112 dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
113 return -EFAULT;
114 }
115 set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
116
117 hw_data->enable_ints(accel_dev);
118 hw_data->enable_error_correction(accel_dev);
119
120 ret = hw_data->enable_pfvf_comms(accel_dev);
121 if (ret)
122 return ret;
123
124 /*
125 * Subservice initialisation is divided into two stages: init and start.
126 * This is to facilitate any ordering dependencies between services
127 * prior to starting any of the accelerators.
128 */
129 list_for_each(list_itr, &service_table) {
130 service = list_entry(list_itr, struct service_hndl, list);
131 if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
132 dev_err(&GET_DEV(accel_dev),
133 "Failed to initialise service %s\n",
134 service->name);
135 return -EFAULT;
136 }
137 set_bit(accel_dev->accel_id, service->init_status);
138 }
139
140 return 0;
141 }
142 EXPORT_SYMBOL_GPL(adf_dev_init);
143
144 /**
145 * adf_dev_start() - Start acceleration service for the given accel device
146 * @accel_dev: Pointer to acceleration device.
147 *
148 * Function notifies all the registered services that the acceleration device
149 * is ready to be used.
150 * To be used by QAT device specific drivers.
151 *
152 * Return: 0 on success, error code otherwise.
153 */
adf_dev_start(struct adf_accel_dev * accel_dev)154 int adf_dev_start(struct adf_accel_dev *accel_dev)
155 {
156 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
157 struct service_hndl *service;
158 struct list_head *list_itr;
159
160 set_bit(ADF_STATUS_STARTING, &accel_dev->status);
161
162 if (adf_ae_start(accel_dev)) {
163 dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
164 return -EFAULT;
165 }
166 set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
167
168 if (hw_data->send_admin_init(accel_dev)) {
169 dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
170 return -EFAULT;
171 }
172
173 /* Set ssm watch dog timer */
174 if (hw_data->set_ssm_wdtimer)
175 hw_data->set_ssm_wdtimer(accel_dev);
176
177 list_for_each(list_itr, &service_table) {
178 service = list_entry(list_itr, struct service_hndl, list);
179 if (service->event_hld(accel_dev, ADF_EVENT_START)) {
180 dev_err(&GET_DEV(accel_dev),
181 "Failed to start service %s\n",
182 service->name);
183 return -EFAULT;
184 }
185 set_bit(accel_dev->accel_id, service->start_status);
186 }
187
188 clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
189 set_bit(ADF_STATUS_STARTED, &accel_dev->status);
190
191 if (!list_empty(&accel_dev->crypto_list) &&
192 (qat_algs_register() || qat_asym_algs_register())) {
193 dev_err(&GET_DEV(accel_dev),
194 "Failed to register crypto algs\n");
195 set_bit(ADF_STATUS_STARTING, &accel_dev->status);
196 clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
197 return -EFAULT;
198 }
199 return 0;
200 }
201 EXPORT_SYMBOL_GPL(adf_dev_start);
202
203 /**
204 * adf_dev_stop() - Stop acceleration service for the given accel device
205 * @accel_dev: Pointer to acceleration device.
206 *
207 * Function notifies all the registered services that the acceleration device
208 * is shuting down.
209 * To be used by QAT device specific drivers.
210 *
211 * Return: void
212 */
adf_dev_stop(struct adf_accel_dev * accel_dev)213 void adf_dev_stop(struct adf_accel_dev *accel_dev)
214 {
215 struct service_hndl *service;
216 struct list_head *list_itr;
217 bool wait = false;
218 int ret;
219
220 if (!adf_dev_started(accel_dev) &&
221 !test_bit(ADF_STATUS_STARTING, &accel_dev->status))
222 return;
223
224 clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
225 clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
226
227 if (!list_empty(&accel_dev->crypto_list)) {
228 qat_algs_unregister();
229 qat_asym_algs_unregister();
230 }
231
232 list_for_each(list_itr, &service_table) {
233 service = list_entry(list_itr, struct service_hndl, list);
234 if (!test_bit(accel_dev->accel_id, service->start_status))
235 continue;
236 ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
237 if (!ret) {
238 clear_bit(accel_dev->accel_id, service->start_status);
239 } else if (ret == -EAGAIN) {
240 wait = true;
241 clear_bit(accel_dev->accel_id, service->start_status);
242 }
243 }
244
245 if (wait)
246 msleep(100);
247
248 if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
249 if (adf_ae_stop(accel_dev))
250 dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
251 else
252 clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
253 }
254 }
255 EXPORT_SYMBOL_GPL(adf_dev_stop);
256
257 /**
258 * adf_dev_shutdown() - shutdown acceleration services and data strucutures
259 * @accel_dev: Pointer to acceleration device
260 *
261 * Cleanup the ring data structures and the admin comms and arbitration
262 * services.
263 */
adf_dev_shutdown(struct adf_accel_dev * accel_dev)264 void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
265 {
266 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
267 struct service_hndl *service;
268 struct list_head *list_itr;
269
270 if (!hw_data) {
271 dev_err(&GET_DEV(accel_dev),
272 "QAT: Failed to shutdown device - hw_data not set\n");
273 return;
274 }
275
276 if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
277 adf_ae_fw_release(accel_dev);
278 clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
279 }
280
281 if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
282 if (adf_ae_shutdown(accel_dev))
283 dev_err(&GET_DEV(accel_dev),
284 "Failed to shutdown Accel Engine\n");
285 else
286 clear_bit(ADF_STATUS_AE_INITIALISED,
287 &accel_dev->status);
288 }
289
290 list_for_each(list_itr, &service_table) {
291 service = list_entry(list_itr, struct service_hndl, list);
292 if (!test_bit(accel_dev->accel_id, service->init_status))
293 continue;
294 if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
295 dev_err(&GET_DEV(accel_dev),
296 "Failed to shutdown service %s\n",
297 service->name);
298 else
299 clear_bit(accel_dev->accel_id, service->init_status);
300 }
301
302 hw_data->disable_iov(accel_dev);
303
304 if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
305 hw_data->free_irq(accel_dev);
306 clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
307 }
308
309 /* Delete configuration only if not restarting */
310 if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
311 adf_cfg_del_all(accel_dev);
312
313 if (hw_data->exit_arb)
314 hw_data->exit_arb(accel_dev);
315
316 if (hw_data->exit_admin_comms)
317 hw_data->exit_admin_comms(accel_dev);
318
319 adf_cleanup_etr_data(accel_dev);
320 adf_dev_restore(accel_dev);
321 }
322 EXPORT_SYMBOL_GPL(adf_dev_shutdown);
323
adf_dev_restarting_notify(struct adf_accel_dev * accel_dev)324 int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
325 {
326 struct service_hndl *service;
327 struct list_head *list_itr;
328
329 list_for_each(list_itr, &service_table) {
330 service = list_entry(list_itr, struct service_hndl, list);
331 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
332 dev_err(&GET_DEV(accel_dev),
333 "Failed to restart service %s.\n",
334 service->name);
335 }
336 return 0;
337 }
338
adf_dev_restarted_notify(struct adf_accel_dev * accel_dev)339 int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
340 {
341 struct service_hndl *service;
342 struct list_head *list_itr;
343
344 list_for_each(list_itr, &service_table) {
345 service = list_entry(list_itr, struct service_hndl, list);
346 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
347 dev_err(&GET_DEV(accel_dev),
348 "Failed to restart service %s.\n",
349 service->name);
350 }
351 return 0;
352 }
353