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d8cba25d TS |
1 | /* |
2 | This file is provided under a dual BSD/GPLv2 license. When using or | |
3 | redistributing this file, you may do so under either license. | |
4 | ||
5 | GPL LICENSE SUMMARY | |
6 | Copyright(c) 2014 Intel Corporation. | |
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of version 2 of the GNU General Public License as | |
9 | published by the Free Software Foundation. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | General Public License for more details. | |
15 | ||
16 | Contact Information: | |
17 | qat-linux@intel.com | |
18 | ||
19 | BSD LICENSE | |
20 | Copyright(c) 2014 Intel Corporation. | |
21 | Redistribution and use in source and binary forms, with or without | |
22 | modification, are permitted provided that the following conditions | |
23 | are met: | |
24 | ||
25 | * Redistributions of source code must retain the above copyright | |
26 | notice, this list of conditions and the following disclaimer. | |
27 | * Redistributions in binary form must reproduce the above copyright | |
28 | notice, this list of conditions and the following disclaimer in | |
29 | the documentation and/or other materials provided with the | |
30 | distribution. | |
31 | * Neither the name of Intel Corporation nor the names of its | |
32 | contributors may be used to endorse or promote products derived | |
33 | from this software without specific prior written permission. | |
34 | ||
35 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
36 | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
37 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
38 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
39 | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
40 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
41 | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
42 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
43 | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
44 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
45 | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
46 | */ | |
47 | #include <linux/module.h> | |
48 | #include <linux/mutex.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/fs.h> | |
51 | #include <linux/bitops.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/cdev.h> | |
54 | #include <linux/uaccess.h> | |
5d26a105 | 55 | #include <linux/crypto.h> |
d8cba25d TS |
56 | |
57 | #include "adf_accel_devices.h" | |
58 | #include "adf_common_drv.h" | |
59 | #include "adf_cfg.h" | |
60 | #include "adf_cfg_common.h" | |
61 | #include "adf_cfg_user.h" | |
62 | ||
63 | #define DEVICE_NAME "qat_adf_ctl" | |
64 | ||
65 | static DEFINE_MUTEX(adf_ctl_lock); | |
66 | static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg); | |
67 | ||
68 | static const struct file_operations adf_ctl_ops = { | |
69 | .owner = THIS_MODULE, | |
70 | .unlocked_ioctl = adf_ctl_ioctl, | |
71 | .compat_ioctl = adf_ctl_ioctl, | |
72 | }; | |
73 | ||
74 | struct adf_ctl_drv_info { | |
75 | unsigned int major; | |
76 | struct cdev drv_cdev; | |
77 | struct class *drv_class; | |
78 | }; | |
79 | ||
80 | static struct adf_ctl_drv_info adt_ctl_drv; | |
81 | ||
82 | static void adf_chr_drv_destroy(void) | |
83 | { | |
84 | device_destroy(adt_ctl_drv.drv_class, MKDEV(adt_ctl_drv.major, 0)); | |
85 | cdev_del(&adt_ctl_drv.drv_cdev); | |
86 | class_destroy(adt_ctl_drv.drv_class); | |
87 | unregister_chrdev_region(MKDEV(adt_ctl_drv.major, 0), 1); | |
88 | } | |
89 | ||
90 | static int adf_chr_drv_create(void) | |
91 | { | |
92 | dev_t dev_id; | |
93 | struct device *drv_device; | |
94 | ||
95 | if (alloc_chrdev_region(&dev_id, 0, 1, DEVICE_NAME)) { | |
96 | pr_err("QAT: unable to allocate chrdev region\n"); | |
97 | return -EFAULT; | |
98 | } | |
99 | ||
100 | adt_ctl_drv.drv_class = class_create(THIS_MODULE, DEVICE_NAME); | |
101 | if (IS_ERR(adt_ctl_drv.drv_class)) { | |
102 | pr_err("QAT: class_create failed for adf_ctl\n"); | |
103 | goto err_chrdev_unreg; | |
104 | } | |
105 | adt_ctl_drv.major = MAJOR(dev_id); | |
106 | cdev_init(&adt_ctl_drv.drv_cdev, &adf_ctl_ops); | |
107 | if (cdev_add(&adt_ctl_drv.drv_cdev, dev_id, 1)) { | |
108 | pr_err("QAT: cdev add failed\n"); | |
109 | goto err_class_destr; | |
110 | } | |
111 | ||
112 | drv_device = device_create(adt_ctl_drv.drv_class, NULL, | |
113 | MKDEV(adt_ctl_drv.major, 0), | |
114 | NULL, DEVICE_NAME); | |
65fafbe9 | 115 | if (IS_ERR(drv_device)) { |
d8cba25d TS |
116 | pr_err("QAT: failed to create device\n"); |
117 | goto err_cdev_del; | |
118 | } | |
119 | return 0; | |
120 | err_cdev_del: | |
121 | cdev_del(&adt_ctl_drv.drv_cdev); | |
122 | err_class_destr: | |
123 | class_destroy(adt_ctl_drv.drv_class); | |
124 | err_chrdev_unreg: | |
125 | unregister_chrdev_region(dev_id, 1); | |
126 | return -EFAULT; | |
127 | } | |
128 | ||
129 | static int adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data **ctl_data, | |
130 | unsigned long arg) | |
131 | { | |
132 | struct adf_user_cfg_ctl_data *cfg_data; | |
133 | ||
134 | cfg_data = kzalloc(sizeof(*cfg_data), GFP_KERNEL); | |
135 | if (!cfg_data) | |
136 | return -ENOMEM; | |
137 | ||
138 | /* Initialize device id to NO DEVICE as 0 is a valid device id */ | |
139 | cfg_data->device_id = ADF_CFG_NO_DEVICE; | |
140 | ||
141 | if (copy_from_user(cfg_data, (void __user *)arg, sizeof(*cfg_data))) { | |
142 | pr_err("QAT: failed to copy from user cfg_data.\n"); | |
143 | kfree(cfg_data); | |
144 | return -EIO; | |
145 | } | |
146 | ||
147 | *ctl_data = cfg_data; | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static int adf_add_key_value_data(struct adf_accel_dev *accel_dev, | |
152 | const char *section, | |
153 | const struct adf_user_cfg_key_val *key_val) | |
154 | { | |
155 | if (key_val->type == ADF_HEX) { | |
156 | long *ptr = (long *)key_val->val; | |
157 | long val = *ptr; | |
158 | ||
159 | if (adf_cfg_add_key_value_param(accel_dev, section, | |
160 | key_val->key, (void *)val, | |
161 | key_val->type)) { | |
162 | pr_err("QAT: failed to add keyvalue.\n"); | |
163 | return -EFAULT; | |
164 | } | |
165 | } else { | |
166 | if (adf_cfg_add_key_value_param(accel_dev, section, | |
167 | key_val->key, key_val->val, | |
168 | key_val->type)) { | |
169 | pr_err("QAT: failed to add keyvalue.\n"); | |
170 | return -EFAULT; | |
171 | } | |
172 | } | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static int adf_copy_key_value_data(struct adf_accel_dev *accel_dev, | |
177 | struct adf_user_cfg_ctl_data *ctl_data) | |
178 | { | |
179 | struct adf_user_cfg_key_val key_val; | |
180 | struct adf_user_cfg_key_val *params_head; | |
181 | struct adf_user_cfg_section section, *section_head; | |
182 | ||
183 | section_head = ctl_data->config_section; | |
184 | ||
185 | while (section_head) { | |
186 | if (copy_from_user(§ion, (void __user *)section_head, | |
187 | sizeof(*section_head))) { | |
188 | pr_err("QAT: failed to copy section info\n"); | |
189 | goto out_err; | |
190 | } | |
191 | ||
192 | if (adf_cfg_section_add(accel_dev, section.name)) { | |
193 | pr_err("QAT: failed to add section.\n"); | |
194 | goto out_err; | |
195 | } | |
196 | ||
197 | params_head = section_head->params; | |
198 | ||
199 | while (params_head) { | |
200 | if (copy_from_user(&key_val, (void __user *)params_head, | |
201 | sizeof(key_val))) { | |
202 | pr_err("QAT: Failed to copy keyvalue.\n"); | |
203 | goto out_err; | |
204 | } | |
205 | if (adf_add_key_value_data(accel_dev, section.name, | |
206 | &key_val)) { | |
207 | goto out_err; | |
208 | } | |
209 | params_head = key_val.next; | |
210 | } | |
211 | section_head = section.next; | |
212 | } | |
213 | return 0; | |
214 | out_err: | |
215 | adf_cfg_del_all(accel_dev); | |
216 | return -EFAULT; | |
217 | } | |
218 | ||
219 | static int adf_ctl_ioctl_dev_config(struct file *fp, unsigned int cmd, | |
220 | unsigned long arg) | |
221 | { | |
222 | int ret; | |
223 | struct adf_user_cfg_ctl_data *ctl_data; | |
224 | struct adf_accel_dev *accel_dev; | |
225 | ||
226 | ret = adf_ctl_alloc_resources(&ctl_data, arg); | |
227 | if (ret) | |
228 | return ret; | |
229 | ||
230 | accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id); | |
231 | if (!accel_dev) { | |
232 | ret = -EFAULT; | |
233 | goto out; | |
234 | } | |
235 | ||
236 | if (adf_dev_started(accel_dev)) { | |
237 | ret = -EFAULT; | |
238 | goto out; | |
239 | } | |
240 | ||
241 | if (adf_copy_key_value_data(accel_dev, ctl_data)) { | |
242 | ret = -EFAULT; | |
243 | goto out; | |
244 | } | |
245 | set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status); | |
246 | out: | |
247 | kfree(ctl_data); | |
248 | return ret; | |
249 | } | |
250 | ||
251 | static int adf_ctl_is_device_in_use(int id) | |
252 | { | |
253 | struct list_head *itr, *head = adf_devmgr_get_head(); | |
254 | ||
255 | list_for_each(itr, head) { | |
256 | struct adf_accel_dev *dev = | |
257 | list_entry(itr, struct adf_accel_dev, list); | |
258 | ||
259 | if (id == dev->accel_id || id == ADF_CFG_ALL_DEVICES) { | |
260 | if (adf_devmgr_in_reset(dev) || adf_dev_in_use(dev)) { | |
261 | pr_info("QAT: device qat_dev%d is busy\n", | |
262 | dev->accel_id); | |
263 | return -EBUSY; | |
264 | } | |
265 | } | |
266 | } | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static int adf_ctl_stop_devices(uint32_t id) | |
271 | { | |
272 | struct list_head *itr, *head = adf_devmgr_get_head(); | |
273 | int ret = 0; | |
274 | ||
275 | list_for_each(itr, head) { | |
276 | struct adf_accel_dev *accel_dev = | |
277 | list_entry(itr, struct adf_accel_dev, list); | |
278 | if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) { | |
279 | if (!adf_dev_started(accel_dev)) | |
280 | continue; | |
281 | ||
282 | if (adf_dev_stop(accel_dev)) { | |
283 | pr_err("QAT: Failed to stop qat_dev%d\n", id); | |
284 | ret = -EFAULT; | |
285 | } | |
286 | } | |
287 | } | |
288 | return ret; | |
289 | } | |
290 | ||
291 | static int adf_ctl_ioctl_dev_stop(struct file *fp, unsigned int cmd, | |
292 | unsigned long arg) | |
293 | { | |
294 | int ret; | |
295 | struct adf_user_cfg_ctl_data *ctl_data; | |
296 | ||
297 | ret = adf_ctl_alloc_resources(&ctl_data, arg); | |
298 | if (ret) | |
299 | return ret; | |
300 | ||
301 | if (adf_devmgr_verify_id(ctl_data->device_id)) { | |
302 | pr_err("QAT: Device %d not found\n", ctl_data->device_id); | |
303 | ret = -ENODEV; | |
304 | goto out; | |
305 | } | |
306 | ||
307 | ret = adf_ctl_is_device_in_use(ctl_data->device_id); | |
308 | if (ret) | |
309 | goto out; | |
310 | ||
311 | if (ctl_data->device_id == ADF_CFG_ALL_DEVICES) | |
312 | pr_info("QAT: Stopping all acceleration devices.\n"); | |
313 | else | |
314 | pr_info("QAT: Stopping acceleration device qat_dev%d.\n", | |
315 | ctl_data->device_id); | |
316 | ||
317 | ret = adf_ctl_stop_devices(ctl_data->device_id); | |
318 | if (ret) | |
319 | pr_err("QAT: failed to stop device.\n"); | |
320 | out: | |
321 | kfree(ctl_data); | |
322 | return ret; | |
323 | } | |
324 | ||
325 | static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd, | |
326 | unsigned long arg) | |
327 | { | |
328 | int ret; | |
329 | struct adf_user_cfg_ctl_data *ctl_data; | |
330 | struct adf_accel_dev *accel_dev; | |
331 | ||
332 | ret = adf_ctl_alloc_resources(&ctl_data, arg); | |
333 | if (ret) | |
334 | return ret; | |
335 | ||
336 | accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id); | |
337 | if (!accel_dev) { | |
338 | pr_err("QAT: Device %d not found\n", ctl_data->device_id); | |
339 | ret = -ENODEV; | |
340 | goto out; | |
341 | } | |
342 | ||
343 | if (!adf_dev_started(accel_dev)) { | |
344 | pr_info("QAT: Starting acceleration device qat_dev%d.\n", | |
345 | ctl_data->device_id); | |
346 | ret = adf_dev_start(accel_dev); | |
347 | } else { | |
348 | pr_info("QAT: Acceleration device qat_dev%d already started.\n", | |
349 | ctl_data->device_id); | |
350 | } | |
351 | if (ret) { | |
352 | pr_err("QAT: Failed to start qat_dev%d\n", ctl_data->device_id); | |
353 | adf_dev_stop(accel_dev); | |
354 | } | |
355 | out: | |
356 | kfree(ctl_data); | |
357 | return ret; | |
358 | } | |
359 | ||
360 | static int adf_ctl_ioctl_get_num_devices(struct file *fp, unsigned int cmd, | |
361 | unsigned long arg) | |
362 | { | |
363 | uint32_t num_devices = 0; | |
364 | ||
365 | adf_devmgr_get_num_dev(&num_devices); | |
366 | if (copy_to_user((void __user *)arg, &num_devices, sizeof(num_devices))) | |
367 | return -EFAULT; | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | static int adf_ctl_ioctl_get_status(struct file *fp, unsigned int cmd, | |
373 | unsigned long arg) | |
374 | { | |
375 | struct adf_hw_device_data *hw_data; | |
376 | struct adf_dev_status_info dev_info; | |
377 | struct adf_accel_dev *accel_dev; | |
378 | ||
379 | if (copy_from_user(&dev_info, (void __user *)arg, | |
380 | sizeof(struct adf_dev_status_info))) { | |
381 | pr_err("QAT: failed to copy from user.\n"); | |
382 | return -EFAULT; | |
383 | } | |
384 | ||
385 | accel_dev = adf_devmgr_get_dev_by_id(dev_info.accel_id); | |
386 | if (!accel_dev) { | |
387 | pr_err("QAT: Device %d not found\n", dev_info.accel_id); | |
388 | return -ENODEV; | |
389 | } | |
390 | hw_data = accel_dev->hw_device; | |
391 | dev_info.state = adf_dev_started(accel_dev) ? DEV_UP : DEV_DOWN; | |
392 | dev_info.num_ae = hw_data->get_num_aes(hw_data); | |
393 | dev_info.num_accel = hw_data->get_num_accels(hw_data); | |
394 | dev_info.num_logical_accel = hw_data->num_logical_accel; | |
395 | dev_info.banks_per_accel = hw_data->num_banks | |
396 | / hw_data->num_logical_accel; | |
397 | strlcpy(dev_info.name, hw_data->dev_class->name, sizeof(dev_info.name)); | |
398 | dev_info.instance_id = hw_data->instance_id; | |
399 | dev_info.type = hw_data->dev_class->type; | |
400 | dev_info.bus = accel_to_pci_dev(accel_dev)->bus->number; | |
401 | dev_info.dev = PCI_SLOT(accel_to_pci_dev(accel_dev)->devfn); | |
402 | dev_info.fun = PCI_FUNC(accel_to_pci_dev(accel_dev)->devfn); | |
403 | ||
404 | if (copy_to_user((void __user *)arg, &dev_info, | |
405 | sizeof(struct adf_dev_status_info))) { | |
406 | pr_err("QAT: failed to copy status.\n"); | |
407 | return -EFAULT; | |
408 | } | |
409 | return 0; | |
410 | } | |
411 | ||
412 | static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) | |
413 | { | |
414 | int ret; | |
415 | ||
416 | if (mutex_lock_interruptible(&adf_ctl_lock)) | |
417 | return -EFAULT; | |
418 | ||
419 | switch (cmd) { | |
420 | case IOCTL_CONFIG_SYS_RESOURCE_PARAMETERS: | |
421 | ret = adf_ctl_ioctl_dev_config(fp, cmd, arg); | |
422 | break; | |
423 | ||
424 | case IOCTL_STOP_ACCEL_DEV: | |
425 | ret = adf_ctl_ioctl_dev_stop(fp, cmd, arg); | |
426 | break; | |
427 | ||
428 | case IOCTL_START_ACCEL_DEV: | |
429 | ret = adf_ctl_ioctl_dev_start(fp, cmd, arg); | |
430 | break; | |
431 | ||
432 | case IOCTL_GET_NUM_DEVICES: | |
433 | ret = adf_ctl_ioctl_get_num_devices(fp, cmd, arg); | |
434 | break; | |
435 | ||
436 | case IOCTL_STATUS_ACCEL_DEV: | |
437 | ret = adf_ctl_ioctl_get_status(fp, cmd, arg); | |
438 | break; | |
439 | default: | |
1a84db56 | 440 | pr_err("QAT: Invalid ioctl\n"); |
d8cba25d TS |
441 | ret = -EFAULT; |
442 | break; | |
443 | } | |
444 | mutex_unlock(&adf_ctl_lock); | |
445 | return ret; | |
446 | } | |
447 | ||
448 | static int __init adf_register_ctl_device_driver(void) | |
449 | { | |
450 | mutex_init(&adf_ctl_lock); | |
451 | ||
452 | if (qat_algs_init()) | |
453 | goto err_algs_init; | |
454 | ||
455 | if (adf_chr_drv_create()) | |
456 | goto err_chr_dev; | |
457 | ||
458 | if (adf_init_aer()) | |
459 | goto err_aer; | |
460 | ||
461 | if (qat_crypto_register()) | |
462 | goto err_crypto_register; | |
463 | ||
464 | return 0; | |
465 | ||
466 | err_crypto_register: | |
467 | adf_exit_aer(); | |
468 | err_aer: | |
469 | adf_chr_drv_destroy(); | |
470 | err_chr_dev: | |
471 | qat_algs_exit(); | |
472 | err_algs_init: | |
473 | mutex_destroy(&adf_ctl_lock); | |
474 | return -EFAULT; | |
475 | } | |
476 | ||
477 | static void __exit adf_unregister_ctl_device_driver(void) | |
478 | { | |
479 | adf_chr_drv_destroy(); | |
480 | adf_exit_aer(); | |
481 | qat_crypto_unregister(); | |
482 | qat_algs_exit(); | |
483 | mutex_destroy(&adf_ctl_lock); | |
484 | } | |
485 | ||
486 | module_init(adf_register_ctl_device_driver); | |
487 | module_exit(adf_unregister_ctl_device_driver); | |
488 | MODULE_LICENSE("Dual BSD/GPL"); | |
489 | MODULE_AUTHOR("Intel"); | |
490 | MODULE_DESCRIPTION("Intel(R) QuickAssist Technology"); | |
5d26a105 | 491 | MODULE_ALIAS_CRYPTO("intel_qat"); |