1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
2 /* Copyright(c) 2014 - 2020 Intel Corporation */
3
4 #include <crypto/algapi.h>
5 #include <linux/module.h>
6 #include <linux/mutex.h>
7 #include <linux/slab.h>
8 #include <linux/fs.h>
9 #include <linux/bitops.h>
10 #include <linux/pci.h>
11 #include <linux/cdev.h>
12 #include <linux/uaccess.h>
13
14 #include "adf_accel_devices.h"
15 #include "adf_common_drv.h"
16 #include "adf_cfg.h"
17 #include "adf_cfg_common.h"
18 #include "adf_cfg_user.h"
19
20 #define ADF_CFG_MAX_SECTION 512
21 #define ADF_CFG_MAX_KEY_VAL 256
22
23 #define DEVICE_NAME "qat_adf_ctl"
24
25 static DEFINE_MUTEX(adf_ctl_lock);
26 static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
27
28 static const struct file_operations adf_ctl_ops = {
29 .owner = THIS_MODULE,
30 .unlocked_ioctl = adf_ctl_ioctl,
31 .compat_ioctl = compat_ptr_ioctl,
32 };
33
34 struct adf_ctl_drv_info {
35 unsigned int major;
36 struct cdev drv_cdev;
37 struct class *drv_class;
38 };
39
40 static struct adf_ctl_drv_info adf_ctl_drv;
41
adf_chr_drv_destroy(void)42 static void adf_chr_drv_destroy(void)
43 {
44 device_destroy(adf_ctl_drv.drv_class, MKDEV(adf_ctl_drv.major, 0));
45 cdev_del(&adf_ctl_drv.drv_cdev);
46 class_destroy(adf_ctl_drv.drv_class);
47 unregister_chrdev_region(MKDEV(adf_ctl_drv.major, 0), 1);
48 }
49
adf_chr_drv_create(void)50 static int adf_chr_drv_create(void)
51 {
52 dev_t dev_id;
53 struct device *drv_device;
54
55 if (alloc_chrdev_region(&dev_id, 0, 1, DEVICE_NAME)) {
56 pr_err("QAT: unable to allocate chrdev region\n");
57 return -EFAULT;
58 }
59
60 adf_ctl_drv.drv_class = class_create(DEVICE_NAME);
61 if (IS_ERR(adf_ctl_drv.drv_class)) {
62 pr_err("QAT: class_create failed for adf_ctl\n");
63 goto err_chrdev_unreg;
64 }
65 adf_ctl_drv.major = MAJOR(dev_id);
66 cdev_init(&adf_ctl_drv.drv_cdev, &adf_ctl_ops);
67 if (cdev_add(&adf_ctl_drv.drv_cdev, dev_id, 1)) {
68 pr_err("QAT: cdev add failed\n");
69 goto err_class_destr;
70 }
71
72 drv_device = device_create(adf_ctl_drv.drv_class, NULL,
73 MKDEV(adf_ctl_drv.major, 0),
74 NULL, DEVICE_NAME);
75 if (IS_ERR(drv_device)) {
76 pr_err("QAT: failed to create device\n");
77 goto err_cdev_del;
78 }
79 return 0;
80 err_cdev_del:
81 cdev_del(&adf_ctl_drv.drv_cdev);
82 err_class_destr:
83 class_destroy(adf_ctl_drv.drv_class);
84 err_chrdev_unreg:
85 unregister_chrdev_region(dev_id, 1);
86 return -EFAULT;
87 }
88
adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data ** ctl_data,unsigned long arg)89 static int adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data **ctl_data,
90 unsigned long arg)
91 {
92 struct adf_user_cfg_ctl_data *cfg_data;
93
94 cfg_data = kzalloc(sizeof(*cfg_data), GFP_KERNEL);
95 if (!cfg_data)
96 return -ENOMEM;
97
98 /* Initialize device id to NO DEVICE as 0 is a valid device id */
99 cfg_data->device_id = ADF_CFG_NO_DEVICE;
100
101 if (copy_from_user(cfg_data, (void __user *)arg, sizeof(*cfg_data))) {
102 pr_err("QAT: failed to copy from user cfg_data.\n");
103 kfree(cfg_data);
104 return -EIO;
105 }
106
107 *ctl_data = cfg_data;
108 return 0;
109 }
110
adf_add_key_value_data(struct adf_accel_dev * accel_dev,const char * section,const struct adf_user_cfg_key_val * key_val)111 static int adf_add_key_value_data(struct adf_accel_dev *accel_dev,
112 const char *section,
113 const struct adf_user_cfg_key_val *key_val)
114 {
115 if (key_val->type == ADF_HEX) {
116 long *ptr = (long *)key_val->val;
117 long val = *ptr;
118
119 if (adf_cfg_add_key_value_param(accel_dev, section,
120 key_val->key, (void *)val,
121 key_val->type)) {
122 dev_err(&GET_DEV(accel_dev),
123 "failed to add hex keyvalue.\n");
124 return -EFAULT;
125 }
126 } else {
127 if (adf_cfg_add_key_value_param(accel_dev, section,
128 key_val->key, key_val->val,
129 key_val->type)) {
130 dev_err(&GET_DEV(accel_dev),
131 "failed to add keyvalue.\n");
132 return -EFAULT;
133 }
134 }
135 return 0;
136 }
137
adf_copy_key_value_data(struct adf_accel_dev * accel_dev,struct adf_user_cfg_ctl_data * ctl_data)138 static int adf_copy_key_value_data(struct adf_accel_dev *accel_dev,
139 struct adf_user_cfg_ctl_data *ctl_data)
140 {
141 struct adf_user_cfg_key_val key_val;
142 struct adf_user_cfg_key_val *params_head;
143 struct adf_user_cfg_section section, *section_head;
144 int i, j;
145
146 section_head = ctl_data->config_section;
147
148 for (i = 0; section_head && i < ADF_CFG_MAX_SECTION; i++) {
149 if (copy_from_user(§ion, (void __user *)section_head,
150 sizeof(*section_head))) {
151 dev_err(&GET_DEV(accel_dev),
152 "failed to copy section info\n");
153 goto out_err;
154 }
155
156 if (adf_cfg_section_add(accel_dev, section.name)) {
157 dev_err(&GET_DEV(accel_dev),
158 "failed to add section.\n");
159 goto out_err;
160 }
161
162 params_head = section.params;
163
164 for (j = 0; params_head && j < ADF_CFG_MAX_KEY_VAL; j++) {
165 if (copy_from_user(&key_val, (void __user *)params_head,
166 sizeof(key_val))) {
167 dev_err(&GET_DEV(accel_dev),
168 "Failed to copy keyvalue.\n");
169 goto out_err;
170 }
171 if (adf_add_key_value_data(accel_dev, section.name,
172 &key_val)) {
173 goto out_err;
174 }
175 params_head = key_val.next;
176 }
177 section_head = section.next;
178 }
179 return 0;
180 out_err:
181 adf_cfg_del_all(accel_dev);
182 return -EFAULT;
183 }
184
adf_ctl_ioctl_dev_config(struct file * fp,unsigned int cmd,unsigned long arg)185 static int adf_ctl_ioctl_dev_config(struct file *fp, unsigned int cmd,
186 unsigned long arg)
187 {
188 int ret;
189 struct adf_user_cfg_ctl_data *ctl_data;
190 struct adf_accel_dev *accel_dev;
191
192 ret = adf_ctl_alloc_resources(&ctl_data, arg);
193 if (ret)
194 return ret;
195
196 accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
197 if (!accel_dev) {
198 ret = -EFAULT;
199 goto out;
200 }
201
202 if (adf_dev_started(accel_dev)) {
203 ret = -EFAULT;
204 goto out;
205 }
206
207 if (adf_copy_key_value_data(accel_dev, ctl_data)) {
208 ret = -EFAULT;
209 goto out;
210 }
211 set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
212 out:
213 kfree(ctl_data);
214 return ret;
215 }
216
adf_ctl_is_device_in_use(int id)217 static int adf_ctl_is_device_in_use(int id)
218 {
219 struct adf_accel_dev *dev;
220
221 list_for_each_entry(dev, adf_devmgr_get_head(), list) {
222 if (id == dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
223 if (adf_devmgr_in_reset(dev) || adf_dev_in_use(dev)) {
224 dev_info(&GET_DEV(dev),
225 "device qat_dev%d is busy\n",
226 dev->accel_id);
227 return -EBUSY;
228 }
229 }
230 }
231 return 0;
232 }
233
adf_ctl_stop_devices(u32 id)234 static void adf_ctl_stop_devices(u32 id)
235 {
236 struct adf_accel_dev *accel_dev;
237
238 list_for_each_entry(accel_dev, adf_devmgr_get_head(), list) {
239 if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
240 if (!adf_dev_started(accel_dev))
241 continue;
242
243 /* First stop all VFs */
244 if (!accel_dev->is_vf)
245 continue;
246
247 adf_dev_down(accel_dev, false);
248 }
249 }
250
251 list_for_each_entry(accel_dev, adf_devmgr_get_head(), list) {
252 if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
253 if (!adf_dev_started(accel_dev))
254 continue;
255
256 adf_dev_down(accel_dev, false);
257 }
258 }
259 }
260
adf_ctl_ioctl_dev_stop(struct file * fp,unsigned int cmd,unsigned long arg)261 static int adf_ctl_ioctl_dev_stop(struct file *fp, unsigned int cmd,
262 unsigned long arg)
263 {
264 int ret;
265 struct adf_user_cfg_ctl_data *ctl_data;
266
267 ret = adf_ctl_alloc_resources(&ctl_data, arg);
268 if (ret)
269 return ret;
270
271 if (adf_devmgr_verify_id(ctl_data->device_id)) {
272 pr_err("QAT: Device %d not found\n", ctl_data->device_id);
273 ret = -ENODEV;
274 goto out;
275 }
276
277 ret = adf_ctl_is_device_in_use(ctl_data->device_id);
278 if (ret)
279 goto out;
280
281 if (ctl_data->device_id == ADF_CFG_ALL_DEVICES)
282 pr_info("QAT: Stopping all acceleration devices.\n");
283 else
284 pr_info("QAT: Stopping acceleration device qat_dev%d.\n",
285 ctl_data->device_id);
286
287 adf_ctl_stop_devices(ctl_data->device_id);
288
289 out:
290 kfree(ctl_data);
291 return ret;
292 }
293
adf_ctl_ioctl_dev_start(struct file * fp,unsigned int cmd,unsigned long arg)294 static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
295 unsigned long arg)
296 {
297 int ret;
298 struct adf_user_cfg_ctl_data *ctl_data;
299 struct adf_accel_dev *accel_dev;
300
301 ret = adf_ctl_alloc_resources(&ctl_data, arg);
302 if (ret)
303 return ret;
304
305 ret = -ENODEV;
306 accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
307 if (!accel_dev)
308 goto out;
309
310 dev_info(&GET_DEV(accel_dev),
311 "Starting acceleration device qat_dev%d.\n",
312 ctl_data->device_id);
313
314 ret = adf_dev_up(accel_dev, false);
315
316 if (ret) {
317 dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
318 ctl_data->device_id);
319 adf_dev_down(accel_dev, false);
320 }
321 out:
322 kfree(ctl_data);
323 return ret;
324 }
325
adf_ctl_ioctl_get_num_devices(struct file * fp,unsigned int cmd,unsigned long arg)326 static int adf_ctl_ioctl_get_num_devices(struct file *fp, unsigned int cmd,
327 unsigned long arg)
328 {
329 u32 num_devices = 0;
330
331 adf_devmgr_get_num_dev(&num_devices);
332 if (copy_to_user((void __user *)arg, &num_devices, sizeof(num_devices)))
333 return -EFAULT;
334
335 return 0;
336 }
337
adf_ctl_ioctl_get_status(struct file * fp,unsigned int cmd,unsigned long arg)338 static int adf_ctl_ioctl_get_status(struct file *fp, unsigned int cmd,
339 unsigned long arg)
340 {
341 struct adf_hw_device_data *hw_data;
342 struct adf_dev_status_info dev_info;
343 struct adf_accel_dev *accel_dev;
344
345 if (copy_from_user(&dev_info, (void __user *)arg,
346 sizeof(struct adf_dev_status_info))) {
347 pr_err("QAT: failed to copy from user.\n");
348 return -EFAULT;
349 }
350
351 accel_dev = adf_devmgr_get_dev_by_id(dev_info.accel_id);
352 if (!accel_dev)
353 return -ENODEV;
354
355 hw_data = accel_dev->hw_device;
356 dev_info.state = adf_dev_started(accel_dev) ? DEV_UP : DEV_DOWN;
357 dev_info.num_ae = hw_data->get_num_aes(hw_data);
358 dev_info.num_accel = hw_data->get_num_accels(hw_data);
359 dev_info.num_logical_accel = hw_data->num_logical_accel;
360 dev_info.banks_per_accel = hw_data->num_banks
361 / hw_data->num_logical_accel;
362 strscpy(dev_info.name, hw_data->dev_class->name, sizeof(dev_info.name));
363 dev_info.instance_id = hw_data->instance_id;
364 dev_info.type = hw_data->dev_class->type;
365 dev_info.bus = accel_to_pci_dev(accel_dev)->bus->number;
366 dev_info.dev = PCI_SLOT(accel_to_pci_dev(accel_dev)->devfn);
367 dev_info.fun = PCI_FUNC(accel_to_pci_dev(accel_dev)->devfn);
368
369 if (copy_to_user((void __user *)arg, &dev_info,
370 sizeof(struct adf_dev_status_info))) {
371 dev_err(&GET_DEV(accel_dev), "failed to copy status.\n");
372 return -EFAULT;
373 }
374 return 0;
375 }
376
adf_ctl_ioctl(struct file * fp,unsigned int cmd,unsigned long arg)377 static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
378 {
379 int ret;
380
381 if (mutex_lock_interruptible(&adf_ctl_lock))
382 return -EFAULT;
383
384 switch (cmd) {
385 case IOCTL_CONFIG_SYS_RESOURCE_PARAMETERS:
386 ret = adf_ctl_ioctl_dev_config(fp, cmd, arg);
387 break;
388
389 case IOCTL_STOP_ACCEL_DEV:
390 ret = adf_ctl_ioctl_dev_stop(fp, cmd, arg);
391 break;
392
393 case IOCTL_START_ACCEL_DEV:
394 ret = adf_ctl_ioctl_dev_start(fp, cmd, arg);
395 break;
396
397 case IOCTL_GET_NUM_DEVICES:
398 ret = adf_ctl_ioctl_get_num_devices(fp, cmd, arg);
399 break;
400
401 case IOCTL_STATUS_ACCEL_DEV:
402 ret = adf_ctl_ioctl_get_status(fp, cmd, arg);
403 break;
404 default:
405 pr_err_ratelimited("QAT: Invalid ioctl %d\n", cmd);
406 ret = -EFAULT;
407 break;
408 }
409 mutex_unlock(&adf_ctl_lock);
410 return ret;
411 }
412
adf_register_ctl_device_driver(void)413 static int __init adf_register_ctl_device_driver(void)
414 {
415 if (adf_chr_drv_create())
416 goto err_chr_dev;
417
418 if (adf_init_misc_wq())
419 goto err_misc_wq;
420
421 if (adf_init_aer())
422 goto err_aer;
423
424 if (adf_init_pf_wq())
425 goto err_pf_wq;
426
427 if (adf_init_vf_wq())
428 goto err_vf_wq;
429
430 if (qat_crypto_register())
431 goto err_crypto_register;
432
433 if (qat_compression_register())
434 goto err_compression_register;
435
436 return 0;
437
438 err_compression_register:
439 qat_crypto_unregister();
440 err_crypto_register:
441 adf_exit_vf_wq();
442 err_vf_wq:
443 adf_exit_pf_wq();
444 err_pf_wq:
445 adf_exit_aer();
446 err_aer:
447 adf_exit_misc_wq();
448 err_misc_wq:
449 adf_chr_drv_destroy();
450 err_chr_dev:
451 mutex_destroy(&adf_ctl_lock);
452 return -EFAULT;
453 }
454
adf_unregister_ctl_device_driver(void)455 static void __exit adf_unregister_ctl_device_driver(void)
456 {
457 adf_chr_drv_destroy();
458 adf_exit_misc_wq();
459 adf_exit_aer();
460 adf_exit_vf_wq();
461 adf_exit_pf_wq();
462 qat_crypto_unregister();
463 qat_compression_unregister();
464 adf_clean_vf_map(false);
465 mutex_destroy(&adf_ctl_lock);
466 }
467
468 module_init(adf_register_ctl_device_driver);
469 module_exit(adf_unregister_ctl_device_driver);
470 MODULE_LICENSE("Dual BSD/GPL");
471 MODULE_AUTHOR("Intel");
472 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
473 MODULE_ALIAS_CRYPTO("intel_qat");
474 MODULE_VERSION(ADF_DRV_VERSION);
475 MODULE_IMPORT_NS(CRYPTO_INTERNAL);
476