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
65 if (!hw_data) {
66 dev_err(&GET_DEV(accel_dev),
67 "Failed to init device - hw_data not set\n");
68 return -EFAULT;
69 }
70
71 if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status)) {
72 dev_err(&GET_DEV(accel_dev), "Device not configured\n");
73 return -EFAULT;
74 }
75
76 if (adf_init_etr_data(accel_dev)) {
77 dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
78 return -EFAULT;
79 }
80
81 if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
82 dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
83 return -EFAULT;
84 }
85
86 if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
87 dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
88 return -EFAULT;
89 }
90
91 hw_data->enable_ints(accel_dev);
92
93 if (adf_ae_init(accel_dev)) {
94 dev_err(&GET_DEV(accel_dev),
95 "Failed to initialise Acceleration Engine\n");
96 return -EFAULT;
97 }
98 set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);
99
100 if (adf_ae_fw_load(accel_dev)) {
101 dev_err(&GET_DEV(accel_dev),
102 "Failed to load acceleration FW\n");
103 return -EFAULT;
104 }
105 set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
106
107 if (hw_data->alloc_irq(accel_dev)) {
108 dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
109 return -EFAULT;
110 }
111 set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
112
113 /*
114 * Subservice initialisation is divided into two stages: init and start.
115 * This is to facilitate any ordering dependencies between services
116 * prior to starting any of the accelerators.
117 */
118 list_for_each(list_itr, &service_table) {
119 service = list_entry(list_itr, struct service_hndl, list);
120 if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
121 dev_err(&GET_DEV(accel_dev),
122 "Failed to initialise service %s\n",
123 service->name);
124 return -EFAULT;
125 }
126 set_bit(accel_dev->accel_id, service->init_status);
127 }
128
129 hw_data->enable_error_correction(accel_dev);
130 hw_data->enable_vf2pf_comms(accel_dev);
131
132 return 0;
133 }
134 EXPORT_SYMBOL_GPL(adf_dev_init);
135
136 /**
137 * adf_dev_start() - Start acceleration service for the given accel device
138 * @accel_dev: Pointer to acceleration device.
139 *
140 * Function notifies all the registered services that the acceleration device
141 * is ready to be used.
142 * To be used by QAT device specific drivers.
143 *
144 * Return: 0 on success, error code otherwise.
145 */
adf_dev_start(struct adf_accel_dev * accel_dev)146 int adf_dev_start(struct adf_accel_dev *accel_dev)
147 {
148 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
149 struct service_hndl *service;
150 struct list_head *list_itr;
151
152 set_bit(ADF_STATUS_STARTING, &accel_dev->status);
153
154 if (adf_ae_start(accel_dev)) {
155 dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
156 return -EFAULT;
157 }
158 set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
159
160 if (hw_data->send_admin_init(accel_dev)) {
161 dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
162 return -EFAULT;
163 }
164
165 list_for_each(list_itr, &service_table) {
166 service = list_entry(list_itr, struct service_hndl, list);
167 if (service->event_hld(accel_dev, ADF_EVENT_START)) {
168 dev_err(&GET_DEV(accel_dev),
169 "Failed to start service %s\n",
170 service->name);
171 return -EFAULT;
172 }
173 set_bit(accel_dev->accel_id, service->start_status);
174 }
175
176 clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
177 set_bit(ADF_STATUS_STARTED, &accel_dev->status);
178
179 if (!list_empty(&accel_dev->crypto_list) &&
180 (qat_algs_register() || qat_asym_algs_register())) {
181 dev_err(&GET_DEV(accel_dev),
182 "Failed to register crypto algs\n");
183 set_bit(ADF_STATUS_STARTING, &accel_dev->status);
184 clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
185 return -EFAULT;
186 }
187 return 0;
188 }
189 EXPORT_SYMBOL_GPL(adf_dev_start);
190
191 /**
192 * adf_dev_stop() - Stop acceleration service for the given accel device
193 * @accel_dev: Pointer to acceleration device.
194 *
195 * Function notifies all the registered services that the acceleration device
196 * is shuting down.
197 * To be used by QAT device specific drivers.
198 *
199 * Return: void
200 */
adf_dev_stop(struct adf_accel_dev * accel_dev)201 void adf_dev_stop(struct adf_accel_dev *accel_dev)
202 {
203 struct service_hndl *service;
204 struct list_head *list_itr;
205 bool wait = false;
206 int ret;
207
208 if (!adf_dev_started(accel_dev) &&
209 !test_bit(ADF_STATUS_STARTING, &accel_dev->status))
210 return;
211
212 clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
213 clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
214
215 if (!list_empty(&accel_dev->crypto_list)) {
216 qat_algs_unregister();
217 qat_asym_algs_unregister();
218 }
219
220 list_for_each(list_itr, &service_table) {
221 service = list_entry(list_itr, struct service_hndl, list);
222 if (!test_bit(accel_dev->accel_id, service->start_status))
223 continue;
224 ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
225 if (!ret) {
226 clear_bit(accel_dev->accel_id, service->start_status);
227 } else if (ret == -EAGAIN) {
228 wait = true;
229 clear_bit(accel_dev->accel_id, service->start_status);
230 }
231 }
232
233 if (wait)
234 msleep(100);
235
236 if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
237 if (adf_ae_stop(accel_dev))
238 dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
239 else
240 clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
241 }
242 }
243 EXPORT_SYMBOL_GPL(adf_dev_stop);
244
245 /**
246 * adf_dev_shutdown() - shutdown acceleration services and data strucutures
247 * @accel_dev: Pointer to acceleration device
248 *
249 * Cleanup the ring data structures and the admin comms and arbitration
250 * services.
251 */
adf_dev_shutdown(struct adf_accel_dev * accel_dev)252 void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
253 {
254 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
255 struct service_hndl *service;
256 struct list_head *list_itr;
257
258 if (!hw_data) {
259 dev_err(&GET_DEV(accel_dev),
260 "QAT: Failed to shutdown device - hw_data not set\n");
261 return;
262 }
263
264 if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
265 adf_ae_fw_release(accel_dev);
266 clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
267 }
268
269 if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
270 if (adf_ae_shutdown(accel_dev))
271 dev_err(&GET_DEV(accel_dev),
272 "Failed to shutdown Accel Engine\n");
273 else
274 clear_bit(ADF_STATUS_AE_INITIALISED,
275 &accel_dev->status);
276 }
277
278 list_for_each(list_itr, &service_table) {
279 service = list_entry(list_itr, struct service_hndl, list);
280 if (!test_bit(accel_dev->accel_id, service->init_status))
281 continue;
282 if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
283 dev_err(&GET_DEV(accel_dev),
284 "Failed to shutdown service %s\n",
285 service->name);
286 else
287 clear_bit(accel_dev->accel_id, service->init_status);
288 }
289
290 hw_data->disable_iov(accel_dev);
291
292 if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
293 hw_data->free_irq(accel_dev);
294 clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
295 }
296
297 /* Delete configuration only if not restarting */
298 if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
299 adf_cfg_del_all(accel_dev);
300
301 if (hw_data->exit_arb)
302 hw_data->exit_arb(accel_dev);
303
304 if (hw_data->exit_admin_comms)
305 hw_data->exit_admin_comms(accel_dev);
306
307 adf_cleanup_etr_data(accel_dev);
308 adf_dev_restore(accel_dev);
309 }
310 EXPORT_SYMBOL_GPL(adf_dev_shutdown);
311
adf_dev_restarting_notify(struct adf_accel_dev * accel_dev)312 int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
313 {
314 struct service_hndl *service;
315 struct list_head *list_itr;
316
317 list_for_each(list_itr, &service_table) {
318 service = list_entry(list_itr, struct service_hndl, list);
319 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
320 dev_err(&GET_DEV(accel_dev),
321 "Failed to restart service %s.\n",
322 service->name);
323 }
324 return 0;
325 }
326
adf_dev_restarted_notify(struct adf_accel_dev * accel_dev)327 int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
328 {
329 struct service_hndl *service;
330 struct list_head *list_itr;
331
332 list_for_each(list_itr, &service_table) {
333 service = list_entry(list_itr, struct service_hndl, list);
334 if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
335 dev_err(&GET_DEV(accel_dev),
336 "Failed to restart service %s.\n",
337 service->name);
338 }
339 return 0;
340 }
341
