1 // SPDX-License-Identifier: GPL-2.0-only
8  * Maintained by: <tpmdd-devel@lists.sourceforge.net>
31 	chip->timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);  in tpm2_get_timeouts()
32 	chip->timeout_b = msecs_to_jiffies(TPM2_TIMEOUT_B);  in tpm2_get_timeouts()
33 	chip->timeout_c = msecs_to_jiffies(TPM2_TIMEOUT_C);  in tpm2_get_timeouts()
34 	chip->timeout_d = msecs_to_jiffies(TPM2_TIMEOUT_D);  in tpm2_get_timeouts()
35 	chip->flags |= TPM_CHIP_FLAG_HAVE_TIMEOUTS;  in tpm2_get_timeouts()
53 	{TPM2_CC_VERIFY_SIGNATURE, 30000},
59 	{TPM2_CC_CREATE_PRIMARY, 30000},
60 	{TPM2_CC_CREATE, 30000},
61 	{TPM2_CC_CREATE_LOADED, 30000},
65  * tpm2_calc_ordinal_duration() - Calculate the maximum command duration
94  * tpm2_pcr_read() - read a PCR value
114 		return -EINVAL;  in tpm2_pcr_read()
117 		for (i = 0; i < chip->nr_allocated_banks &&  in tpm2_pcr_read()
118 		     chip->allocated_banks[i].alg_id != digest->alg_id; i++)  in tpm2_pcr_read()
121 		if (i == chip->nr_allocated_banks)  in tpm2_pcr_read()
122 			return -EINVAL;  in tpm2_pcr_read()
124 		expected_digest_size = chip->allocated_banks[i].digest_size;  in tpm2_pcr_read()
134 	tpm_buf_append_u16(&buf, digest->alg_id);  in tpm2_pcr_read()
144 	digest_size = be16_to_cpu(out->digest_size);  in tpm2_pcr_read()
145 	if (digest_size > sizeof(digest->digest) ||  in tpm2_pcr_read()
147 		rc = -EINVAL;  in tpm2_pcr_read()
154 	memcpy(digest->digest, out->digest, digest_size);  in tpm2_pcr_read()
161  * tpm2_pcr_extend() - extend a PCR value
197 	tpm_buf_append_u32(&buf, chip->nr_allocated_banks);  in tpm2_pcr_extend()
199 	for (i = 0; i < chip->nr_allocated_banks; i++) {  in tpm2_pcr_extend()
202 			       chip->allocated_banks[i].digest_size);  in tpm2_pcr_extend()
222  * tpm2_get_random() - get random bytes from the TPM RNG
230  *   -errno otherwise (positive TPM return codes are masked to -EIO)
246 		return -EINVAL;  in tpm2_get_random()
272 				err = -EIO;  in tpm2_get_random()
279 		if (be16_to_cpu(head->tag) == TPM2_ST_SESSIONS)  in tpm2_get_random()
283 		recd = min_t(u32, be16_to_cpu(out->size), num_bytes);  in tpm2_get_random()
288 			err = -EFAULT;  in tpm2_get_random()
291 		memcpy(dest_ptr, out->buffer, recd);  in tpm2_get_random()
295 		num_bytes -= recd;  in tpm2_get_random()
296 	} while (retries-- && total < max);  in tpm2_get_random()
300 	return total ? total : -EIO;  in tpm2_get_random()
308  * tpm2_flush_context() - execute a TPM2_FlushContext command
319 		dev_warn(&chip->dev, "0x%08x was not flushed, out of memory\n",  in tpm2_flush_context()
340  * tpm2_get_tpm_pt() - get value of a TPM_CAP_TPM_PROPERTIES type property
348  *   -errno or a TPM return code otherwise
373 		if (be32_to_cpu(out->property_cnt) > 0)  in tpm2_get_tpm_pt()
374 			*value = be32_to_cpu(out->value);  in tpm2_get_tpm_pt()
376 			rc = -ENODATA;  in tpm2_get_tpm_pt()
384  * tpm2_shutdown() - send a TPM shutdown command
407  * tpm2_do_selftest() - ensure that all self tests have passed
445  * tpm2_probe() - probe for the TPM 2.0 protocol
454  *   -errno otherwise
472 		if (be16_to_cpu(out->tag) == TPM2_ST_NO_SESSIONS)  in tpm2_probe()
473 			chip->flags |= TPM_CHIP_FLAG_TPM2;  in tpm2_probe()
482 	struct tpm_bank_info *bank = chip->allocated_banks + bank_index;  in tpm2_init_bank_info()
483 	struct tpm_digest digest = { .alg_id = bank->alg_id };  in tpm2_init_bank_info()
493 		if (bank->alg_id != tpm2_hash_map[i].tpm_id)  in tpm2_init_bank_info()
496 		bank->digest_size = hash_digest_size[crypto_algo];  in tpm2_init_bank_info()
497 		bank->crypto_id = crypto_algo;  in tpm2_init_bank_info()
501 	bank->crypto_id = HASH_ALGO__LAST;  in tpm2_init_bank_info()
503 	return tpm2_pcr_read(chip, 0, &digest, &bank->digest_size);  in tpm2_init_bank_info()
542 	chip->allocated_banks = kcalloc(nr_possible_banks,  in tpm2_get_pcr_allocation()
543 					sizeof(*chip->allocated_banks),  in tpm2_get_pcr_allocation()
545 	if (!chip->allocated_banks) {  in tpm2_get_pcr_allocation()
546 		rc = -ENOMEM;  in tpm2_get_pcr_allocation()
559 			rc = -EFAULT;  in tpm2_get_pcr_allocation()
569 			chip->allocated_banks[nr_alloc_banks].alg_id = hash_alg;  in tpm2_get_pcr_allocation()
584 	chip->nr_allocated_banks = nr_alloc_banks;  in tpm2_get_pcr_allocation()
605 		rc = -EFAULT;  in tpm2_get_cc_attrs_tbl()
609 	chip->cc_attrs_tbl = devm_kcalloc(&chip->dev, 4, nr_commands,  in tpm2_get_cc_attrs_tbl()
611 	if (!chip->cc_attrs_tbl) {  in tpm2_get_cc_attrs_tbl()
612 		rc = -ENOMEM;  in tpm2_get_cc_attrs_tbl()
632 		rc = -EFAULT;  in tpm2_get_cc_attrs_tbl()
637 	chip->nr_commands = nr_commands;  in tpm2_get_cc_attrs_tbl()
641 		chip->cc_attrs_tbl[i] = be32_to_cpup(attrs);  in tpm2_get_cc_attrs_tbl()
642 		cc = chip->cc_attrs_tbl[i] & 0xFFFF;  in tpm2_get_cc_attrs_tbl()
645 			chip->cc_attrs_tbl[i] &=  in tpm2_get_cc_attrs_tbl()
647 			chip->cc_attrs_tbl[i] |= 1 << TPM2_CC_ATTR_CHANDLES;  in tpm2_get_cc_attrs_tbl()
655 		rc = -ENODEV;  in tpm2_get_cc_attrs_tbl()
661  * tpm2_startup - turn on the TPM
676 	dev_info(&chip->dev, "starting up the TPM manually\n");  in tpm2_startup()
690  * tpm2_auto_startup - Perform the standard automatic TPM initialization
719 	if (rc == TPM2_RC_FAILURE || (rc < 0 && rc != -ENOMEM)) {  in tpm2_auto_startup()
720 		dev_info(&chip->dev,  in tpm2_auto_startup()
722 		chip->flags |= TPM_CHIP_FLAG_FIRMWARE_UPGRADE;  in tpm2_auto_startup()
736 	if (rc == TPM2_RC_UPGRADE || rc == -ENODATA) {  in tpm2_auto_startup()
737 		dev_info(&chip->dev, "TPM in field upgrade mode, requires firmware upgrade\n");  in tpm2_auto_startup()
738 		chip->flags |= TPM_CHIP_FLAG_FIRMWARE_UPGRADE;  in tpm2_auto_startup()
743 		rc = -ENODEV;  in tpm2_auto_startup()
753 	for (i = 0; i < chip->nr_commands; i++)  in tpm2_find_cc()
754 		if (cc == (chip->cc_attrs_tbl[i] & cc_mask))  in tpm2_find_cc()
757 	return -1;  in tpm2_find_cc()