17  * Note, the TPM chip is not interrupt driven (only polling)
44  * @chip:    TPM chip to use.
47  * The function returns the maximum amount of time the chip could take
52 unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)  in tpm_calc_ordinal_duration()  argument
54 	if (chip->flags & TPM_CHIP_FLAG_TPM2)  in tpm_calc_ordinal_duration()
57 		return tpm1_calc_ordinal_duration(chip, ordinal);  in tpm_calc_ordinal_duration()
61 static void tpm_chip_cancel(struct tpm_chip *chip)  in tpm_chip_cancel()  argument
63 	if (!chip->ops->cancel)  in tpm_chip_cancel()
66 	chip->ops->cancel(chip);  in tpm_chip_cancel()
69 static u8 tpm_chip_status(struct tpm_chip *chip)  in tpm_chip_status()  argument
71 	if (!chip->ops->status)  in tpm_chip_status()
74 	return chip->ops->status(chip);  in tpm_chip_status()
77 static bool tpm_chip_req_canceled(struct tpm_chip *chip, u8 status)  in tpm_chip_req_canceled()  argument
79 	if (!chip->ops->req_canceled)  in tpm_chip_req_canceled()
82 	return chip->ops->req_canceled(chip, status);  in tpm_chip_req_canceled()
85 static bool tpm_transmit_completed(u8 status, struct tpm_chip *chip)  in tpm_transmit_completed()  argument
87 	u8 status_masked = status & chip->ops->req_complete_mask;  in tpm_transmit_completed()
89 	return status_masked == chip->ops->req_complete_val;  in tpm_transmit_completed()
92 static ssize_t tpm_try_transmit(struct tpm_chip *chip, void *buf, size_t bufsiz)  in tpm_try_transmit()  argument
111 		dev_err(&chip->dev,  in tpm_try_transmit()
116 	rc = chip->ops->send(chip, buf, bufsiz, count);  in tpm_try_transmit()
119 			dev_err(&chip->dev,  in tpm_try_transmit()
128 	if (chip->flags & TPM_CHIP_FLAG_SYNC) {  in tpm_try_transmit()
139 		dev_warn(&chip->dev,  in tpm_try_transmit()
144 	if (chip->flags & TPM_CHIP_FLAG_IRQ)  in tpm_try_transmit()
147 	stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);  in tpm_try_transmit()
149 		u8 status = tpm_chip_status(chip);  in tpm_try_transmit()
150 		if (tpm_transmit_completed(status, chip))  in tpm_try_transmit()
153 		if (tpm_chip_req_canceled(chip, status)) {  in tpm_try_transmit()
154 			dev_err(&chip->dev, "Operation Canceled\n");  in tpm_try_transmit()
166 	if (tpm_transmit_completed(tpm_chip_status(chip), chip))  in tpm_try_transmit()
169 	tpm_chip_cancel(chip);  in tpm_try_transmit()
170 	dev_err(&chip->dev, "Operation Timed out\n");  in tpm_try_transmit()
174 	len = chip->ops->recv(chip, buf, bufsiz);  in tpm_try_transmit()
177 		dev_err(&chip->dev, "tpm_transmit: tpm_recv: error %d\n", rc);  in tpm_try_transmit()
189  * @chip:	a TPM chip to use
204 ssize_t tpm_transmit(struct tpm_chip *chip, u8 *buf, size_t bufsiz)  in tpm_transmit()  argument
224 		ret = tpm_try_transmit(chip, buf, bufsiz);  in tpm_transmit()
239 				dev_err(&chip->dev, "in retry loop\n");  in tpm_transmit()
241 				dev_err(&chip->dev,  in tpm_transmit()
254  * @chip:			a TPM chip to use
264 ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf,  in tpm_transmit_cmd()  argument
271 	len = tpm_transmit(chip, buf->data, PAGE_SIZE);  in tpm_transmit_cmd()
278 		dev_err(&chip->dev, "A TPM error (%d) occurred %s\n", err,  in tpm_transmit_cmd()
291 int tpm_get_timeouts(struct tpm_chip *chip)  in tpm_get_timeouts()  argument
293 	if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)  in tpm_get_timeouts()
296 	if (chip->flags & TPM_CHIP_FLAG_TPM2)  in tpm_get_timeouts()
297 		return tpm2_get_timeouts(chip);  in tpm_get_timeouts()
299 		return tpm1_get_timeouts(chip);  in tpm_get_timeouts()
304  * tpm_is_tpm2 - do we a have a TPM2 chip?
305  * @chip:	a &struct tpm_chip instance, %NULL for the default chip
308  * 1 if we have a TPM2 chip.
309  * 0 if we don't have a TPM2 chip.
312 int tpm_is_tpm2(struct tpm_chip *chip)  in tpm_is_tpm2()  argument
316 	if (!chip)  in tpm_is_tpm2()
319 	rc = tpm_try_get_ops(chip);  in tpm_is_tpm2()
323 	rc = (chip->flags & TPM_CHIP_FLAG_TPM2) != 0;  in tpm_is_tpm2()
325 	tpm_put_ops(chip);  in tpm_is_tpm2()
333  * @chip:	a &struct tpm_chip instance, %NULL for the default chip
339 int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx,  in tpm_pcr_read()  argument
344 	if (!chip)  in tpm_pcr_read()
347 	rc = tpm_try_get_ops(chip);  in tpm_pcr_read()
351 	if (chip->flags & TPM_CHIP_FLAG_TPM2)  in tpm_pcr_read()
352 		rc = tpm2_pcr_read(chip, pcr_idx, digest, NULL);  in tpm_pcr_read()
354 		rc = tpm1_pcr_read(chip, pcr_idx, digest->digest);  in tpm_pcr_read()
356 	tpm_put_ops(chip);  in tpm_pcr_read()
363  * @chip:	a &struct tpm_chip instance, %NULL for the default chip
368  * order of the banks in chip->allocated_banks.
372 int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,  in tpm_pcr_extend()  argument
378 	if (!chip)  in tpm_pcr_extend()
381 	rc = tpm_try_get_ops(chip);  in tpm_pcr_extend()
385 	for (i = 0; i < chip->nr_allocated_banks; i++) {  in tpm_pcr_extend()
386 		if (digests[i].alg_id != chip->allocated_banks[i].alg_id) {  in tpm_pcr_extend()
392 	if (chip->flags & TPM_CHIP_FLAG_TPM2) {  in tpm_pcr_extend()
393 		rc = tpm2_pcr_extend(chip, pcr_idx, digests);  in tpm_pcr_extend()
397 	rc = tpm1_pcr_extend(chip, pcr_idx, digests[0].digest,  in tpm_pcr_extend()
401 	tpm_put_ops(chip);  in tpm_pcr_extend()
406 int tpm_auto_startup(struct tpm_chip *chip)  in tpm_auto_startup()  argument
410 	if (!(chip->ops->flags & TPM_OPS_AUTO_STARTUP))  in tpm_auto_startup()
413 	if (chip->flags & TPM_CHIP_FLAG_TPM2)  in tpm_auto_startup()
414 		rc = tpm2_auto_startup(chip);  in tpm_auto_startup()
416 		rc = tpm1_auto_startup(chip);  in tpm_auto_startup()
427 	struct tpm_chip *chip = dev_get_drvdata(dev);  in tpm_pm_suspend()  local
430 	if (!chip)  in tpm_pm_suspend()
433 	rc = tpm_try_get_ops(chip);  in tpm_pm_suspend()
436 		chip->flags |= TPM_CHIP_FLAG_SUSPENDED;  in tpm_pm_suspend()
440 	if (chip->flags & TPM_CHIP_FLAG_ALWAYS_POWERED)  in tpm_pm_suspend()
443 	if ((chip->flags & TPM_CHIP_FLAG_FIRMWARE_POWER_MANAGED) &&  in tpm_pm_suspend()
447 	if (chip->flags & TPM_CHIP_FLAG_TPM2) {  in tpm_pm_suspend()
448 		tpm2_end_auth_session(chip);  in tpm_pm_suspend()
449 		tpm2_shutdown(chip, TPM2_SU_STATE);  in tpm_pm_suspend()
453 	rc = tpm1_pm_suspend(chip, tpm_suspend_pcr);  in tpm_pm_suspend()
456 	chip->flags |= TPM_CHIP_FLAG_SUSPENDED;  in tpm_pm_suspend()
457 	tpm_put_ops(chip);  in tpm_pm_suspend()
472 	struct tpm_chip *chip = dev_get_drvdata(dev);  in tpm_pm_resume()  local
474 	if (chip == NULL)  in tpm_pm_resume()
477 	chip->flags &= ~TPM_CHIP_FLAG_SUSPENDED;  in tpm_pm_resume()
481 	 * activate before the chip has been fully resumed.  in tpm_pm_resume()
491  * @chip:	a &struct tpm_chip instance, %NULL for the default chip
497 int tpm_get_random(struct tpm_chip *chip, u8 *out, size_t max)  in tpm_get_random()  argument
504 	if (!chip)  in tpm_get_random()
507 	rc = tpm_try_get_ops(chip);  in tpm_get_random()
511 	if (chip->flags & TPM_CHIP_FLAG_TPM2)  in tpm_get_random()
512 		rc = tpm2_get_random(chip, out, max);  in tpm_get_random()
514 		rc = tpm1_get_random(chip, out, max);  in tpm_get_random()
516 	tpm_put_ops(chip);  in tpm_get_random()