51 int tpm_try_get_ops(struct tpm_chip *chip)  in tpm_try_get_ops()  argument
55 	get_device(&chip->dev);  in tpm_try_get_ops()
57 	down_read(&chip->ops_sem);  in tpm_try_get_ops()
58 	if (!chip->ops)  in tpm_try_get_ops()
63 	up_read(&chip->ops_sem);  in tpm_try_get_ops()
64 	put_device(&chip->dev);  in tpm_try_get_ops()
76 void tpm_put_ops(struct tpm_chip *chip)  in tpm_put_ops()  argument
78 	up_read(&chip->ops_sem);  in tpm_put_ops()
79 	put_device(&chip->dev);  in tpm_put_ops()
88 	struct tpm_chip *chip, *res = NULL;  in tpm_default_chip()  local
96 		chip = idr_get_next(&dev_nums_idr, &chip_num);  in tpm_default_chip()
97 		if (chip) {  in tpm_default_chip()
98 			get_device(&chip->dev);  in tpm_default_chip()
99 			res = chip;  in tpm_default_chip()
125 struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip)  in tpm_find_get_ops()  argument
129 	if (chip) {  in tpm_find_get_ops()
130 		if (!tpm_try_get_ops(chip))  in tpm_find_get_ops()
131 			return chip;  in tpm_find_get_ops()
135 	chip = tpm_default_chip();  in tpm_find_get_ops()
136 	if (!chip)  in tpm_find_get_ops()
138 	rc = tpm_try_get_ops(chip);  in tpm_find_get_ops()
140 	put_device(&chip->dev);  in tpm_find_get_ops()
143 	return chip;  in tpm_find_get_ops()
154 	struct tpm_chip *chip = container_of(dev, struct tpm_chip, dev);  in tpm_dev_release()  local
157 	idr_remove(&dev_nums_idr, chip->dev_num);  in tpm_dev_release()
160 	kfree(chip->log.bios_event_log);  in tpm_dev_release()
161 	kfree(chip->work_space.context_buf);  in tpm_dev_release()
162 	kfree(chip->work_space.session_buf);  in tpm_dev_release()
163 	kfree(chip);  in tpm_dev_release()
168 	struct tpm_chip *chip = container_of(dev, struct tpm_chip, devs);  in tpm_devs_release()  local
171 	put_device(&chip->dev);  in tpm_devs_release()
188 	struct tpm_chip *chip = container_of(dev, struct tpm_chip, dev);  in tpm_class_shutdown()  local
190 	if (chip->flags & TPM_CHIP_FLAG_TPM2) {  in tpm_class_shutdown()
191 		down_write(&chip->ops_sem);  in tpm_class_shutdown()
192 		tpm2_shutdown(chip, TPM2_SU_CLEAR);  in tpm_class_shutdown()
193 		chip->ops = NULL;  in tpm_class_shutdown()
194 		up_write(&chip->ops_sem);  in tpm_class_shutdown()
213 	struct tpm_chip *chip;  in tpm_chip_alloc()  local
216 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);  in tpm_chip_alloc()
217 	if (chip == NULL)  in tpm_chip_alloc()
220 	mutex_init(&chip->tpm_mutex);  in tpm_chip_alloc()
221 	init_rwsem(&chip->ops_sem);  in tpm_chip_alloc()
223 	chip->ops = ops;  in tpm_chip_alloc()
230 		kfree(chip);  in tpm_chip_alloc()
233 	chip->dev_num = rc;  in tpm_chip_alloc()
235 	device_initialize(&chip->dev);  in tpm_chip_alloc()
236 	device_initialize(&chip->devs);  in tpm_chip_alloc()
238 	chip->dev.class = tpm_class;  in tpm_chip_alloc()
239 	chip->dev.class->shutdown_pre = tpm_class_shutdown;  in tpm_chip_alloc()
240 	chip->dev.release = tpm_dev_release;  in tpm_chip_alloc()
241 	chip->dev.parent = pdev;  in tpm_chip_alloc()
242 	chip->dev.groups = chip->groups;  in tpm_chip_alloc()
244 	chip->devs.parent = pdev;  in tpm_chip_alloc()
245 	chip->devs.class = tpmrm_class;  in tpm_chip_alloc()
246 	chip->devs.release = tpm_devs_release;  in tpm_chip_alloc()
252 	if (chip->flags & TPM_CHIP_FLAG_TPM2)  in tpm_chip_alloc()
253 		get_device(&chip->dev);  in tpm_chip_alloc()
255 	if (chip->dev_num == 0)  in tpm_chip_alloc()
256 		chip->dev.devt = MKDEV(MISC_MAJOR, TPM_MINOR);  in tpm_chip_alloc()
258 		chip->dev.devt = MKDEV(MAJOR(tpm_devt), chip->dev_num);  in tpm_chip_alloc()
260 	chip->devs.devt =  in tpm_chip_alloc()
261 		MKDEV(MAJOR(tpm_devt), chip->dev_num + TPM_NUM_DEVICES);  in tpm_chip_alloc()
263 	rc = dev_set_name(&chip->dev, "tpm%d", chip->dev_num);  in tpm_chip_alloc()
266 	rc = dev_set_name(&chip->devs, "tpmrm%d", chip->dev_num);  in tpm_chip_alloc()
271 		chip->flags |= TPM_CHIP_FLAG_VIRTUAL;  in tpm_chip_alloc()
273 	cdev_init(&chip->cdev, &tpm_fops);  in tpm_chip_alloc()
274 	cdev_init(&chip->cdevs, &tpmrm_fops);  in tpm_chip_alloc()
275 	chip->cdev.owner = THIS_MODULE;  in tpm_chip_alloc()
276 	chip->cdevs.owner = THIS_MODULE;  in tpm_chip_alloc()
278 	chip->work_space.context_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);  in tpm_chip_alloc()
279 	if (!chip->work_space.context_buf) {  in tpm_chip_alloc()
283 	chip->work_space.session_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);  in tpm_chip_alloc()
284 	if (!chip->work_space.session_buf) {  in tpm_chip_alloc()
289 	chip->locality = -1;  in tpm_chip_alloc()
290 	return chip;  in tpm_chip_alloc()
293 	put_device(&chip->devs);  in tpm_chip_alloc()
294 	put_device(&chip->dev);  in tpm_chip_alloc()
309 	struct tpm_chip *chip;  in tpmm_chip_alloc()  local
312 	chip = tpm_chip_alloc(pdev, ops);  in tpmm_chip_alloc()
313 	if (IS_ERR(chip))  in tpmm_chip_alloc()
314 		return chip;  in tpmm_chip_alloc()
318 				      &chip->dev);  in tpmm_chip_alloc()
322 	dev_set_drvdata(pdev, chip);  in tpmm_chip_alloc()
324 	return chip;  in tpmm_chip_alloc()
328 static int tpm_add_char_device(struct tpm_chip *chip)  in tpm_add_char_device()  argument
332 	rc = cdev_device_add(&chip->cdev, &chip->dev);  in tpm_add_char_device()
334 		dev_err(&chip->dev,  in tpm_add_char_device()
336 			dev_name(&chip->dev), MAJOR(chip->dev.devt),  in tpm_add_char_device()
337 			MINOR(chip->dev.devt), rc);  in tpm_add_char_device()
341 	if (chip->flags & TPM_CHIP_FLAG_TPM2) {  in tpm_add_char_device()
342 		rc = cdev_device_add(&chip->cdevs, &chip->devs);  in tpm_add_char_device()
344 			dev_err(&chip->devs,  in tpm_add_char_device()
346 				dev_name(&chip->devs), MAJOR(chip->devs.devt),  in tpm_add_char_device()
347 				MINOR(chip->devs.devt), rc);  in tpm_add_char_device()
354 	idr_replace(&dev_nums_idr, chip, chip->dev_num);  in tpm_add_char_device()
360 static void tpm_del_char_device(struct tpm_chip *chip)  in tpm_del_char_device()  argument
362 	cdev_device_del(&chip->cdev, &chip->dev);  in tpm_del_char_device()
366 	idr_replace(&dev_nums_idr, NULL, chip->dev_num);  in tpm_del_char_device()
370 	down_write(&chip->ops_sem);  in tpm_del_char_device()
371 	if (chip->flags & TPM_CHIP_FLAG_TPM2)  in tpm_del_char_device()
372 		tpm2_shutdown(chip, TPM2_SU_CLEAR);  in tpm_del_char_device()
373 	chip->ops = NULL;  in tpm_del_char_device()
374 	up_write(&chip->ops_sem);  in tpm_del_char_device()
377 static void tpm_del_legacy_sysfs(struct tpm_chip *chip)  in tpm_del_legacy_sysfs()  argument
381 	if (chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL))  in tpm_del_legacy_sysfs()
384 	sysfs_remove_link(&chip->dev.parent->kobj, "ppi");  in tpm_del_legacy_sysfs()
386 	for (i = chip->groups[0]->attrs; *i != NULL; ++i)  in tpm_del_legacy_sysfs()
387 		sysfs_remove_link(&chip->dev.parent->kobj, (*i)->name);  in tpm_del_legacy_sysfs()
394 static int tpm_add_legacy_sysfs(struct tpm_chip *chip)  in tpm_add_legacy_sysfs()  argument
399 	if (chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL))  in tpm_add_legacy_sysfs()
403 		    &chip->dev.parent->kobj, &chip->dev.kobj, "ppi");  in tpm_add_legacy_sysfs()
408 	for (i = chip->groups[0]->attrs; *i != NULL; ++i) {  in tpm_add_legacy_sysfs()
410 		    &chip->dev.parent->kobj, &chip->dev.kobj, (*i)->name);  in tpm_add_legacy_sysfs()
412 			tpm_del_legacy_sysfs(chip);  in tpm_add_legacy_sysfs()
422 	struct tpm_chip *chip = container_of(rng, struct tpm_chip, hwrng);  in tpm_hwrng_read()  local
424 	return tpm_get_random(chip, data, max);  in tpm_hwrng_read()
427 static int tpm_add_hwrng(struct tpm_chip *chip)  in tpm_add_hwrng()  argument
432 	snprintf(chip->hwrng_name, sizeof(chip->hwrng_name),  in tpm_add_hwrng()
433 		 "tpm-rng-%d", chip->dev_num);  in tpm_add_hwrng()
434 	chip->hwrng.name = chip->hwrng_name;  in tpm_add_hwrng()
435 	chip->hwrng.read = tpm_hwrng_read;  in tpm_add_hwrng()
436 	return hwrng_register(&chip->hwrng);  in tpm_add_hwrng()
450 int tpm_chip_register(struct tpm_chip *chip)  in tpm_chip_register()  argument
454 	if (chip->ops->flags & TPM_OPS_AUTO_STARTUP) {  in tpm_chip_register()
455 		if (chip->flags & TPM_CHIP_FLAG_TPM2)  in tpm_chip_register()
456 			rc = tpm2_auto_startup(chip);  in tpm_chip_register()
458 			rc = tpm1_auto_startup(chip);  in tpm_chip_register()
463 	tpm_sysfs_add_device(chip);  in tpm_chip_register()
465 	rc = tpm_bios_log_setup(chip);  in tpm_chip_register()
469 	tpm_add_ppi(chip);  in tpm_chip_register()
471 	rc = tpm_add_hwrng(chip);  in tpm_chip_register()
475 	rc = tpm_add_char_device(chip);  in tpm_chip_register()
479 	rc = tpm_add_legacy_sysfs(chip);  in tpm_chip_register()
481 		tpm_chip_unregister(chip);  in tpm_chip_register()
489 		hwrng_unregister(&chip->hwrng);  in tpm_chip_register()
491 	tpm_bios_log_teardown(chip);  in tpm_chip_register()
510 void tpm_chip_unregister(struct tpm_chip *chip)  in tpm_chip_unregister()  argument
512 	tpm_del_legacy_sysfs(chip);  in tpm_chip_unregister()
514 		hwrng_unregister(&chip->hwrng);  in tpm_chip_unregister()
515 	tpm_bios_log_teardown(chip);  in tpm_chip_unregister()
516 	if (chip->flags & TPM_CHIP_FLAG_TPM2)  in tpm_chip_unregister()
517 		cdev_device_del(&chip->cdevs, &chip->devs);  in tpm_chip_unregister()
518 	tpm_del_char_device(chip);  in tpm_chip_unregister()