1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
2 /* Copyright(c) 2014 - 2020 Intel Corporation */
3 #include <linux/module.h>
4 #include <linux/mutex.h>
5 #include <linux/slab.h>
6 #include <linux/fs.h>
7 #include <linux/bitops.h>
8 #include <linux/pci.h>
9 #include <linux/cdev.h>
10 #include <linux/uaccess.h>
11 #include <linux/crypto.h>
12
13 #include "adf_accel_devices.h"
14 #include "adf_common_drv.h"
15 #include "adf_cfg.h"
16 #include "adf_cfg_common.h"
17 #include "adf_cfg_user.h"
18
19 #define ADF_CFG_MAX_SECTION 512
20 #define ADF_CFG_MAX_KEY_VAL 256
21
22 #define DEVICE_NAME "qat_adf_ctl"
23
24 static DEFINE_MUTEX(adf_ctl_lock);
25 static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
26
27 static const struct file_operations adf_ctl_ops = {
28 .owner = THIS_MODULE,
29 .unlocked_ioctl = adf_ctl_ioctl,
30 .compat_ioctl = compat_ptr_ioctl,
31 };
32
33 struct adf_ctl_drv_info {
34 unsigned int major;
35 struct cdev drv_cdev;
36 struct class *drv_class;
37 };
38
39 static struct adf_ctl_drv_info adf_ctl_drv;
40
adf_chr_drv_destroy(void)41 static void adf_chr_drv_destroy(void)
42 {
43 device_destroy(adf_ctl_drv.drv_class, MKDEV(adf_ctl_drv.major, 0));
44 cdev_del(&adf_ctl_drv.drv_cdev);
45 class_destroy(adf_ctl_drv.drv_class);
46 unregister_chrdev_region(MKDEV(adf_ctl_drv.major, 0), 1);
47 }
48
adf_chr_drv_create(void)49 static int adf_chr_drv_create(void)
50 {
51 dev_t dev_id;
52 struct device *drv_device;
53
54 if (alloc_chrdev_region(&dev_id, 0, 1, DEVICE_NAME)) {
55 pr_err("QAT: unable to allocate chrdev region\n");
56 return -EFAULT;
57 }
58
59 adf_ctl_drv.drv_class = class_create(THIS_MODULE, DEVICE_NAME);
60 if (IS_ERR(adf_ctl_drv.drv_class)) {
61 pr_err("QAT: class_create failed for adf_ctl\n");
62 goto err_chrdev_unreg;
63 }
64 adf_ctl_drv.major = MAJOR(dev_id);
65 cdev_init(&adf_ctl_drv.drv_cdev, &adf_ctl_ops);
66 if (cdev_add(&adf_ctl_drv.drv_cdev, dev_id, 1)) {
67 pr_err("QAT: cdev add failed\n");
68 goto err_class_destr;
69 }
70
71 drv_device = device_create(adf_ctl_drv.drv_class, NULL,
72 MKDEV(adf_ctl_drv.major, 0),
73 NULL, DEVICE_NAME);
74 if (IS_ERR(drv_device)) {
75 pr_err("QAT: failed to create device\n");
76 goto err_cdev_del;
77 }
78 return 0;
79 err_cdev_del:
80 cdev_del(&adf_ctl_drv.drv_cdev);
81 err_class_destr:
82 class_destroy(adf_ctl_drv.drv_class);
83 err_chrdev_unreg:
84 unregister_chrdev_region(dev_id, 1);
85 return -EFAULT;
86 }
87
adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data ** ctl_data,unsigned long arg)88 static int adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data **ctl_data,
89 unsigned long arg)
90 {
91 struct adf_user_cfg_ctl_data *cfg_data;
92
93 cfg_data = kzalloc(sizeof(*cfg_data), GFP_KERNEL);
94 if (!cfg_data)
95 return -ENOMEM;
96
97 /* Initialize device id to NO DEVICE as 0 is a valid device id */
98 cfg_data->device_id = ADF_CFG_NO_DEVICE;
99
100 if (copy_from_user(cfg_data, (void __user *)arg, sizeof(*cfg_data))) {
101 pr_err("QAT: failed to copy from user cfg_data.\n");
102 kfree(cfg_data);
103 return -EIO;
104 }
105
106 *ctl_data = cfg_data;
107 return 0;
108 }
109
adf_add_key_value_data(struct adf_accel_dev * accel_dev,const char * section,const struct adf_user_cfg_key_val * key_val)110 static int adf_add_key_value_data(struct adf_accel_dev *accel_dev,
111 const char *section,
112 const struct adf_user_cfg_key_val *key_val)
113 {
114 if (key_val->type == ADF_HEX) {
115 long *ptr = (long *)key_val->val;
116 long val = *ptr;
117
118 if (adf_cfg_add_key_value_param(accel_dev, section,
119 key_val->key, (void *)val,
120 key_val->type)) {
121 dev_err(&GET_DEV(accel_dev),
122 "failed to add hex keyvalue.\n");
123 return -EFAULT;
124 }
125 } else {
126 if (adf_cfg_add_key_value_param(accel_dev, section,
127 key_val->key, key_val->val,
128 key_val->type)) {
129 dev_err(&GET_DEV(accel_dev),
130 "failed to add keyvalue.\n");
131 return -EFAULT;
132 }
133 }
134 return 0;
135 }
136
adf_copy_key_value_data(struct adf_accel_dev * accel_dev,struct adf_user_cfg_ctl_data * ctl_data)137 static int adf_copy_key_value_data(struct adf_accel_dev *accel_dev,
138 struct adf_user_cfg_ctl_data *ctl_data)
139 {
140 struct adf_user_cfg_key_val key_val;
141 struct adf_user_cfg_key_val *params_head;
142 struct adf_user_cfg_section section, *section_head;
143 int i, j;
144
145 section_head = ctl_data->config_section;
146
147 for (i = 0; section_head && i < ADF_CFG_MAX_SECTION; i++) {
148 if (copy_from_user(§ion, (void __user *)section_head,
149 sizeof(*section_head))) {
150 dev_err(&GET_DEV(accel_dev),
151 "failed to copy section info\n");
152 goto out_err;
153 }
154
155 if (adf_cfg_section_add(accel_dev, section.name)) {
156 dev_err(&GET_DEV(accel_dev),
157 "failed to add section.\n");
158 goto out_err;
159 }
160
161 params_head = section.params;
162
163 for (j = 0; params_head && j < ADF_CFG_MAX_KEY_VAL; j++) {
164 if (copy_from_user(&key_val, (void __user *)params_head,
165 sizeof(key_val))) {
166 dev_err(&GET_DEV(accel_dev),
167 "Failed to copy keyvalue.\n");
168 goto out_err;
169 }
170 if (adf_add_key_value_data(accel_dev, section.name,
171 &key_val)) {
172 goto out_err;
173 }
174 params_head = key_val.next;
175 }
176 section_head = section.next;
177 }
178 return 0;
179 out_err:
180 adf_cfg_del_all(accel_dev);
181 return -EFAULT;
182 }
183
adf_ctl_ioctl_dev_config(struct file * fp,unsigned int cmd,unsigned long arg)184 static int adf_ctl_ioctl_dev_config(struct file *fp, unsigned int cmd,
185 unsigned long arg)
186 {
187 int ret;
188 struct adf_user_cfg_ctl_data *ctl_data;
189 struct adf_accel_dev *accel_dev;
190
191 ret = adf_ctl_alloc_resources(&ctl_data, arg);
192 if (ret)
193 return ret;
194
195 accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
196 if (!accel_dev) {
197 ret = -EFAULT;
198 goto out;
199 }
200
201 if (adf_dev_started(accel_dev)) {
202 ret = -EFAULT;
203 goto out;
204 }
205
206 if (adf_copy_key_value_data(accel_dev, ctl_data)) {
207 ret = -EFAULT;
208 goto out;
209 }
210 set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status);
211 out:
212 kfree(ctl_data);
213 return ret;
214 }
215
adf_ctl_is_device_in_use(int id)216 static int adf_ctl_is_device_in_use(int id)
217 {
218 struct adf_accel_dev *dev;
219
220 list_for_each_entry(dev, adf_devmgr_get_head(), list) {
221 if (id == dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
222 if (adf_devmgr_in_reset(dev) || adf_dev_in_use(dev)) {
223 dev_info(&GET_DEV(dev),
224 "device qat_dev%d is busy\n",
225 dev->accel_id);
226 return -EBUSY;
227 }
228 }
229 }
230 return 0;
231 }
232
adf_ctl_stop_devices(u32 id)233 static void adf_ctl_stop_devices(u32 id)
234 {
235 struct adf_accel_dev *accel_dev;
236
237 list_for_each_entry(accel_dev, adf_devmgr_get_head(), list) {
238 if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
239 if (!adf_dev_started(accel_dev))
240 continue;
241
242 /* First stop all VFs */
243 if (!accel_dev->is_vf)
244 continue;
245
246 adf_dev_stop(accel_dev);
247 adf_dev_shutdown(accel_dev);
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_stop(accel_dev);
257 adf_dev_shutdown(accel_dev);
258 }
259 }
260 }
261
adf_ctl_ioctl_dev_stop(struct file * fp,unsigned int cmd,unsigned long arg)262 static int adf_ctl_ioctl_dev_stop(struct file *fp, unsigned int cmd,
263 unsigned long arg)
264 {
265 int ret;
266 struct adf_user_cfg_ctl_data *ctl_data;
267
268 ret = adf_ctl_alloc_resources(&ctl_data, arg);
269 if (ret)
270 return ret;
271
272 if (adf_devmgr_verify_id(ctl_data->device_id)) {
273 pr_err("QAT: Device %d not found\n", ctl_data->device_id);
274 ret = -ENODEV;
275 goto out;
276 }
277
278 ret = adf_ctl_is_device_in_use(ctl_data->device_id);
279 if (ret)
280 goto out;
281
282 if (ctl_data->device_id == ADF_CFG_ALL_DEVICES)
283 pr_info("QAT: Stopping all acceleration devices.\n");
284 else
285 pr_info("QAT: Stopping acceleration device qat_dev%d.\n",
286 ctl_data->device_id);
287
288 adf_ctl_stop_devices(ctl_data->device_id);
289
290 out:
291 kfree(ctl_data);
292 return ret;
293 }
294
adf_ctl_ioctl_dev_start(struct file * fp,unsigned int cmd,unsigned long arg)295 static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
296 unsigned long arg)
297 {
298 int ret;
299 struct adf_user_cfg_ctl_data *ctl_data;
300 struct adf_accel_dev *accel_dev;
301
302 ret = adf_ctl_alloc_resources(&ctl_data, arg);
303 if (ret)
304 return ret;
305
306 ret = -ENODEV;
307 accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id);
308 if (!accel_dev)
309 goto out;
310
311 if (!adf_dev_started(accel_dev)) {
312 dev_info(&GET_DEV(accel_dev),
313 "Starting acceleration device qat_dev%d.\n",
314 ctl_data->device_id);
315 ret = adf_dev_init(accel_dev);
316 if (!ret)
317 ret = adf_dev_start(accel_dev);
318 } else {
319 dev_info(&GET_DEV(accel_dev),
320 "Acceleration device qat_dev%d already started.\n",
321 ctl_data->device_id);
322 }
323 if (ret) {
324 dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
325 ctl_data->device_id);
326 adf_dev_stop(accel_dev);
327 adf_dev_shutdown(accel_dev);
328 }
329 out:
330 kfree(ctl_data);
331 return ret;
332 }
333
adf_ctl_ioctl_get_num_devices(struct file * fp,unsigned int cmd,unsigned long arg)334 static int adf_ctl_ioctl_get_num_devices(struct file *fp, unsigned int cmd,
335 unsigned long arg)
336 {
337 u32 num_devices = 0;
338
339 adf_devmgr_get_num_dev(&num_devices);
340 if (copy_to_user((void __user *)arg, &num_devices, sizeof(num_devices)))
341 return -EFAULT;
342
343 return 0;
344 }
345
adf_ctl_ioctl_get_status(struct file * fp,unsigned int cmd,unsigned long arg)346 static int adf_ctl_ioctl_get_status(struct file *fp, unsigned int cmd,
347 unsigned long arg)
348 {
349 struct adf_hw_device_data *hw_data;
350 struct adf_dev_status_info dev_info;
351 struct adf_accel_dev *accel_dev;
352
353 if (copy_from_user(&dev_info, (void __user *)arg,
354 sizeof(struct adf_dev_status_info))) {
355 pr_err("QAT: failed to copy from user.\n");
356 return -EFAULT;
357 }
358
359 accel_dev = adf_devmgr_get_dev_by_id(dev_info.accel_id);
360 if (!accel_dev)
361 return -ENODEV;
362
363 hw_data = accel_dev->hw_device;
364 dev_info.state = adf_dev_started(accel_dev) ? DEV_UP : DEV_DOWN;
365 dev_info.num_ae = hw_data->get_num_aes(hw_data);
366 dev_info.num_accel = hw_data->get_num_accels(hw_data);
367 dev_info.num_logical_accel = hw_data->num_logical_accel;
368 dev_info.banks_per_accel = hw_data->num_banks
369 / hw_data->num_logical_accel;
370 strscpy(dev_info.name, hw_data->dev_class->name, sizeof(dev_info.name));
371 dev_info.instance_id = hw_data->instance_id;
372 dev_info.type = hw_data->dev_class->type;
373 dev_info.bus = accel_to_pci_dev(accel_dev)->bus->number;
374 dev_info.dev = PCI_SLOT(accel_to_pci_dev(accel_dev)->devfn);
375 dev_info.fun = PCI_FUNC(accel_to_pci_dev(accel_dev)->devfn);
376
377 if (copy_to_user((void __user *)arg, &dev_info,
378 sizeof(struct adf_dev_status_info))) {
379 dev_err(&GET_DEV(accel_dev), "failed to copy status.\n");
380 return -EFAULT;
381 }
382 return 0;
383 }
384
adf_ctl_ioctl(struct file * fp,unsigned int cmd,unsigned long arg)385 static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
386 {
387 int ret;
388
389 if (mutex_lock_interruptible(&adf_ctl_lock))
390 return -EFAULT;
391
392 switch (cmd) {
393 case IOCTL_CONFIG_SYS_RESOURCE_PARAMETERS:
394 ret = adf_ctl_ioctl_dev_config(fp, cmd, arg);
395 break;
396
397 case IOCTL_STOP_ACCEL_DEV:
398 ret = adf_ctl_ioctl_dev_stop(fp, cmd, arg);
399 break;
400
401 case IOCTL_START_ACCEL_DEV:
402 ret = adf_ctl_ioctl_dev_start(fp, cmd, arg);
403 break;
404
405 case IOCTL_GET_NUM_DEVICES:
406 ret = adf_ctl_ioctl_get_num_devices(fp, cmd, arg);
407 break;
408
409 case IOCTL_STATUS_ACCEL_DEV:
410 ret = adf_ctl_ioctl_get_status(fp, cmd, arg);
411 break;
412 default:
413 pr_err_ratelimited("QAT: Invalid ioctl %d\n", cmd);
414 ret = -EFAULT;
415 break;
416 }
417 mutex_unlock(&adf_ctl_lock);
418 return ret;
419 }
420
adf_register_ctl_device_driver(void)421 static int __init adf_register_ctl_device_driver(void)
422 {
423 if (adf_chr_drv_create())
424 goto err_chr_dev;
425
426 if (adf_init_misc_wq())
427 goto err_misc_wq;
428
429 if (adf_init_aer())
430 goto err_aer;
431
432 if (adf_init_pf_wq())
433 goto err_pf_wq;
434
435 if (adf_init_vf_wq())
436 goto err_vf_wq;
437
438 if (qat_crypto_register())
439 goto err_crypto_register;
440
441 if (qat_compression_register())
442 goto err_compression_register;
443
444 return 0;
445
446 err_compression_register:
447 qat_crypto_unregister();
448 err_crypto_register:
449 adf_exit_vf_wq();
450 err_vf_wq:
451 adf_exit_pf_wq();
452 err_pf_wq:
453 adf_exit_aer();
454 err_aer:
455 adf_exit_misc_wq();
456 err_misc_wq:
457 adf_chr_drv_destroy();
458 err_chr_dev:
459 mutex_destroy(&adf_ctl_lock);
460 return -EFAULT;
461 }
462
adf_unregister_ctl_device_driver(void)463 static void __exit adf_unregister_ctl_device_driver(void)
464 {
465 adf_chr_drv_destroy();
466 adf_exit_misc_wq();
467 adf_exit_aer();
468 adf_exit_vf_wq();
469 adf_exit_pf_wq();
470 qat_crypto_unregister();
471 qat_compression_unregister();
472 adf_clean_vf_map(false);
473 mutex_destroy(&adf_ctl_lock);
474 }
475
476 module_init(adf_register_ctl_device_driver);
477 module_exit(adf_unregister_ctl_device_driver);
478 MODULE_LICENSE("Dual BSD/GPL");
479 MODULE_AUTHOR("Intel");
480 MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
481 MODULE_ALIAS_CRYPTO("intel_qat");
482 MODULE_VERSION(ADF_DRV_VERSION);
483 MODULE_IMPORT_NS(CRYPTO_INTERNAL);
484