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
25static DEFINE_MUTEX(adf_ctl_lock);
26static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
27
28static 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
34static const struct class adf_ctl_class = {
35 .name = DEVICE_NAME,
36};
37
38struct adf_ctl_drv_info {
39 unsigned int major;
40 struct cdev drv_cdev;
41};
42
43static struct adf_ctl_drv_info adf_ctl_drv;
44
45static void adf_chr_drv_destroy(void)
46{
47 device_destroy(cls: &adf_ctl_class, MKDEV(adf_ctl_drv.major, 0));
48 cdev_del(&adf_ctl_drv.drv_cdev);
49 class_unregister(class: &adf_ctl_class);
50 unregister_chrdev_region(MKDEV(adf_ctl_drv.major, 0), 1);
51}
52
53static int adf_chr_drv_create(void)
54{
55 dev_t dev_id;
56 struct device *drv_device;
57 int ret;
58
59 if (alloc_chrdev_region(&dev_id, 0, 1, DEVICE_NAME)) {
60 pr_err("QAT: unable to allocate chrdev region\n");
61 return -EFAULT;
62 }
63
64 ret = class_register(class: &adf_ctl_class);
65 if (ret)
66 goto err_chrdev_unreg;
67
68 adf_ctl_drv.major = MAJOR(dev_id);
69 cdev_init(&adf_ctl_drv.drv_cdev, &adf_ctl_ops);
70 if (cdev_add(&adf_ctl_drv.drv_cdev, dev_id, 1)) {
71 pr_err("QAT: cdev add failed\n");
72 goto err_class_destr;
73 }
74
75 drv_device = device_create(cls: &adf_ctl_class, NULL,
76 MKDEV(adf_ctl_drv.major, 0),
77 NULL, DEVICE_NAME);
78 if (IS_ERR(ptr: drv_device)) {
79 pr_err("QAT: failed to create device\n");
80 goto err_cdev_del;
81 }
82 return 0;
83err_cdev_del:
84 cdev_del(&adf_ctl_drv.drv_cdev);
85err_class_destr:
86 class_unregister(class: &adf_ctl_class);
87err_chrdev_unreg:
88 unregister_chrdev_region(dev_id, 1);
89 return -EFAULT;
90}
91
92static int adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data **ctl_data,
93 unsigned long arg)
94{
95 struct adf_user_cfg_ctl_data *cfg_data;
96
97 cfg_data = kzalloc(sizeof(*cfg_data), GFP_KERNEL);
98 if (!cfg_data)
99 return -ENOMEM;
100
101 /* Initialize device id to NO DEVICE as 0 is a valid device id */
102 cfg_data->device_id = ADF_CFG_NO_DEVICE;
103
104 if (copy_from_user(to: cfg_data, from: (void __user *)arg, n: sizeof(*cfg_data))) {
105 pr_err("QAT: failed to copy from user cfg_data.\n");
106 kfree(objp: cfg_data);
107 return -EIO;
108 }
109
110 *ctl_data = cfg_data;
111 return 0;
112}
113
114static int adf_add_key_value_data(struct adf_accel_dev *accel_dev,
115 const char *section,
116 const struct adf_user_cfg_key_val *key_val)
117{
118 if (key_val->type == ADF_HEX) {
119 long *ptr = (long *)key_val->val;
120 long val = *ptr;
121
122 if (adf_cfg_add_key_value_param(accel_dev, section_name: section,
123 key: key_val->key, val: (void *)val,
124 type: key_val->type)) {
125 dev_err(&GET_DEV(accel_dev),
126 "failed to add hex keyvalue.\n");
127 return -EFAULT;
128 }
129 } else {
130 if (adf_cfg_add_key_value_param(accel_dev, section_name: section,
131 key: key_val->key, val: key_val->val,
132 type: key_val->type)) {
133 dev_err(&GET_DEV(accel_dev),
134 "failed to add keyvalue.\n");
135 return -EFAULT;
136 }
137 }
138 return 0;
139}
140
141static int adf_copy_key_value_data(struct adf_accel_dev *accel_dev,
142 struct adf_user_cfg_ctl_data *ctl_data)
143{
144 struct adf_user_cfg_key_val key_val;
145 struct adf_user_cfg_key_val *params_head;
146 struct adf_user_cfg_section section, *section_head;
147 int i, j;
148
149 section_head = ctl_data->config_section;
150
151 for (i = 0; section_head && i < ADF_CFG_MAX_SECTION; i++) {
152 if (copy_from_user(to: &section, from: (void __user *)section_head,
153 n: sizeof(*section_head))) {
154 dev_err(&GET_DEV(accel_dev),
155 "failed to copy section info\n");
156 goto out_err;
157 }
158
159 if (adf_cfg_section_add(accel_dev, name: section.name)) {
160 dev_err(&GET_DEV(accel_dev),
161 "failed to add section.\n");
162 goto out_err;
163 }
164
165 params_head = section.params;
166
167 for (j = 0; params_head && j < ADF_CFG_MAX_KEY_VAL; j++) {
168 if (copy_from_user(to: &key_val, from: (void __user *)params_head,
169 n: sizeof(key_val))) {
170 dev_err(&GET_DEV(accel_dev),
171 "Failed to copy keyvalue.\n");
172 goto out_err;
173 }
174 if (adf_add_key_value_data(accel_dev, section: section.name,
175 key_val: &key_val)) {
176 goto out_err;
177 }
178 params_head = key_val.next;
179 }
180 section_head = section.next;
181 }
182 return 0;
183out_err:
184 adf_cfg_del_all(accel_dev);
185 return -EFAULT;
186}
187
188static int adf_ctl_ioctl_dev_config(struct file *fp, unsigned int cmd,
189 unsigned long arg)
190{
191 int ret;
192 struct adf_user_cfg_ctl_data *ctl_data;
193 struct adf_accel_dev *accel_dev;
194
195 ret = adf_ctl_alloc_resources(ctl_data: &ctl_data, arg);
196 if (ret)
197 return ret;
198
199 accel_dev = adf_devmgr_get_dev_by_id(id: ctl_data->device_id);
200 if (!accel_dev) {
201 ret = -EFAULT;
202 goto out;
203 }
204
205 if (adf_dev_started(accel_dev)) {
206 ret = -EFAULT;
207 goto out;
208 }
209
210 if (adf_copy_key_value_data(accel_dev, ctl_data)) {
211 ret = -EFAULT;
212 goto out;
213 }
214 set_bit(ADF_STATUS_CONFIGURED, addr: &accel_dev->status);
215out:
216 kfree(objp: ctl_data);
217 return ret;
218}
219
220static int adf_ctl_is_device_in_use(int id)
221{
222 struct adf_accel_dev *dev;
223
224 list_for_each_entry(dev, adf_devmgr_get_head(), list) {
225 if (id == dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
226 if (adf_devmgr_in_reset(accel_dev: dev) || adf_dev_in_use(accel_dev: dev)) {
227 dev_info(&GET_DEV(dev),
228 "device qat_dev%d is busy\n",
229 dev->accel_id);
230 return -EBUSY;
231 }
232 }
233 }
234 return 0;
235}
236
237static void adf_ctl_stop_devices(u32 id)
238{
239 struct adf_accel_dev *accel_dev;
240
241 list_for_each_entry(accel_dev, adf_devmgr_get_head(), list) {
242 if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
243 if (!adf_dev_started(accel_dev))
244 continue;
245
246 /* First stop all VFs */
247 if (!accel_dev->is_vf)
248 continue;
249
250 adf_dev_down(accel_dev);
251 }
252 }
253
254 list_for_each_entry(accel_dev, adf_devmgr_get_head(), list) {
255 if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) {
256 if (!adf_dev_started(accel_dev))
257 continue;
258
259 adf_dev_down(accel_dev);
260 }
261 }
262}
263
264static int adf_ctl_ioctl_dev_stop(struct file *fp, unsigned int cmd,
265 unsigned long arg)
266{
267 int ret;
268 struct adf_user_cfg_ctl_data *ctl_data;
269
270 ret = adf_ctl_alloc_resources(ctl_data: &ctl_data, arg);
271 if (ret)
272 return ret;
273
274 if (adf_devmgr_verify_id(id: ctl_data->device_id)) {
275 pr_err("QAT: Device %d not found\n", ctl_data->device_id);
276 ret = -ENODEV;
277 goto out;
278 }
279
280 ret = adf_ctl_is_device_in_use(id: ctl_data->device_id);
281 if (ret)
282 goto out;
283
284 if (ctl_data->device_id == ADF_CFG_ALL_DEVICES)
285 pr_info("QAT: Stopping all acceleration devices.\n");
286 else
287 pr_info("QAT: Stopping acceleration device qat_dev%d.\n",
288 ctl_data->device_id);
289
290 adf_ctl_stop_devices(id: ctl_data->device_id);
291
292out:
293 kfree(objp: ctl_data);
294 return ret;
295}
296
297static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd,
298 unsigned long arg)
299{
300 int ret;
301 struct adf_user_cfg_ctl_data *ctl_data;
302 struct adf_accel_dev *accel_dev;
303
304 ret = adf_ctl_alloc_resources(ctl_data: &ctl_data, arg);
305 if (ret)
306 return ret;
307
308 ret = -ENODEV;
309 accel_dev = adf_devmgr_get_dev_by_id(id: ctl_data->device_id);
310 if (!accel_dev)
311 goto out;
312
313 dev_info(&GET_DEV(accel_dev),
314 "Starting acceleration device qat_dev%d.\n",
315 ctl_data->device_id);
316
317 ret = adf_dev_up(accel_dev, init_config: false);
318
319 if (ret) {
320 dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n",
321 ctl_data->device_id);
322 adf_dev_down(accel_dev);
323 }
324out:
325 kfree(objp: ctl_data);
326 return ret;
327}
328
329static int adf_ctl_ioctl_get_num_devices(struct file *fp, unsigned int cmd,
330 unsigned long arg)
331{
332 u32 num_devices = 0;
333
334 adf_devmgr_get_num_dev(num: &num_devices);
335 if (copy_to_user(to: (void __user *)arg, from: &num_devices, n: sizeof(num_devices)))
336 return -EFAULT;
337
338 return 0;
339}
340
341static int adf_ctl_ioctl_get_status(struct file *fp, unsigned int cmd,
342 unsigned long arg)
343{
344 struct adf_hw_device_data *hw_data;
345 struct adf_dev_status_info dev_info;
346 struct adf_accel_dev *accel_dev;
347
348 if (copy_from_user(to: &dev_info, from: (void __user *)arg,
349 n: sizeof(struct adf_dev_status_info))) {
350 pr_err("QAT: failed to copy from user.\n");
351 return -EFAULT;
352 }
353
354 accel_dev = adf_devmgr_get_dev_by_id(id: dev_info.accel_id);
355 if (!accel_dev)
356 return -ENODEV;
357
358 hw_data = accel_dev->hw_device;
359 dev_info.state = adf_dev_started(accel_dev) ? DEV_UP : DEV_DOWN;
360 dev_info.num_ae = hw_data->get_num_aes(hw_data);
361 dev_info.num_accel = hw_data->get_num_accels(hw_data);
362 dev_info.num_logical_accel = hw_data->num_logical_accel;
363 dev_info.banks_per_accel = hw_data->num_banks
364 / hw_data->num_logical_accel;
365 strscpy(dev_info.name, hw_data->dev_class->name, sizeof(dev_info.name));
366 dev_info.instance_id = hw_data->instance_id;
367 dev_info.type = hw_data->dev_class->type;
368 dev_info.bus = accel_to_pci_dev(accel_dev)->bus->number;
369 dev_info.dev = PCI_SLOT(accel_to_pci_dev(accel_dev)->devfn);
370 dev_info.fun = PCI_FUNC(accel_to_pci_dev(accel_dev)->devfn);
371
372 if (copy_to_user(to: (void __user *)arg, from: &dev_info,
373 n: sizeof(struct adf_dev_status_info))) {
374 dev_err(&GET_DEV(accel_dev), "failed to copy status.\n");
375 return -EFAULT;
376 }
377 return 0;
378}
379
380static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
381{
382 int ret;
383
384 if (mutex_lock_interruptible(&adf_ctl_lock))
385 return -EFAULT;
386
387 switch (cmd) {
388 case IOCTL_CONFIG_SYS_RESOURCE_PARAMETERS:
389 ret = adf_ctl_ioctl_dev_config(fp, cmd, arg);
390 break;
391
392 case IOCTL_STOP_ACCEL_DEV:
393 ret = adf_ctl_ioctl_dev_stop(fp, cmd, arg);
394 break;
395
396 case IOCTL_START_ACCEL_DEV:
397 ret = adf_ctl_ioctl_dev_start(fp, cmd, arg);
398 break;
399
400 case IOCTL_GET_NUM_DEVICES:
401 ret = adf_ctl_ioctl_get_num_devices(fp, cmd, arg);
402 break;
403
404 case IOCTL_STATUS_ACCEL_DEV:
405 ret = adf_ctl_ioctl_get_status(fp, cmd, arg);
406 break;
407 default:
408 pr_err_ratelimited("QAT: Invalid ioctl %d\n", cmd);
409 ret = -EFAULT;
410 break;
411 }
412 mutex_unlock(lock: &adf_ctl_lock);
413 return ret;
414}
415
416static int __init adf_register_ctl_device_driver(void)
417{
418 if (adf_chr_drv_create())
419 goto err_chr_dev;
420
421 if (adf_init_misc_wq())
422 goto err_misc_wq;
423
424 if (adf_init_aer())
425 goto err_aer;
426
427 if (adf_init_pf_wq())
428 goto err_pf_wq;
429
430 if (adf_init_vf_wq())
431 goto err_vf_wq;
432
433 if (qat_crypto_register())
434 goto err_crypto_register;
435
436 if (qat_compression_register())
437 goto err_compression_register;
438
439 return 0;
440
441err_compression_register:
442 qat_crypto_unregister();
443err_crypto_register:
444 adf_exit_vf_wq();
445err_vf_wq:
446 adf_exit_pf_wq();
447err_pf_wq:
448 adf_exit_aer();
449err_aer:
450 adf_exit_misc_wq();
451err_misc_wq:
452 adf_chr_drv_destroy();
453err_chr_dev:
454 mutex_destroy(lock: &adf_ctl_lock);
455 return -EFAULT;
456}
457
458static void __exit adf_unregister_ctl_device_driver(void)
459{
460 adf_chr_drv_destroy();
461 adf_exit_misc_wq();
462 adf_exit_aer();
463 adf_exit_vf_wq();
464 adf_exit_pf_wq();
465 qat_crypto_unregister();
466 qat_compression_unregister();
467 adf_clean_vf_map(false);
468 mutex_destroy(lock: &adf_ctl_lock);
469}
470
471module_init(adf_register_ctl_device_driver);
472module_exit(adf_unregister_ctl_device_driver);
473MODULE_LICENSE("Dual BSD/GPL");
474MODULE_AUTHOR("Intel");
475MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
476MODULE_ALIAS_CRYPTO("intel_qat");
477MODULE_VERSION(ADF_DRV_VERSION);
478MODULE_IMPORT_NS("CRYPTO_INTERNAL");
479

source code of linux/drivers/crypto/intel/qat/qat_common/adf_ctl_drv.c