1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2012-2014 Intel Corporation
10  * Maintained by: <tpmdd-devel@lists.sourceforge.net>
55 	return scnprintf(buf, PAGE_SIZE, "%s\n", chip->ppi_version);  in tpm_show_ppi_version()
61 	ssize_t size = -EINVAL;  in tpm_show_ppi_request()
67 	if (strcmp(chip->ppi_version, "1.2") < 0)  in tpm_show_ppi_request()
70 	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETREQ,  in tpm_show_ppi_request()
73 		return -ENXIO;  in tpm_show_ppi_request()
81 	if (obj->package.count == 3 &&  in tpm_show_ppi_request()
82 	    obj->package.elements[0].type == ACPI_TYPE_INTEGER &&  in tpm_show_ppi_request()
83 	    obj->package.elements[1].type == ACPI_TYPE_INTEGER &&  in tpm_show_ppi_request()
84 	    obj->package.elements[2].type == ACPI_TYPE_INTEGER) {  in tpm_show_ppi_request()
85 		if (obj->package.elements[0].integer.value)  in tpm_show_ppi_request()
86 			size = -EFAULT;  in tpm_show_ppi_request()
88 			req = obj->package.elements[1].integer.value;  in tpm_show_ppi_request()
91 				    "%llu %llu\n", req,  in tpm_show_ppi_request()
92 				    obj->package.elements[2].integer.value);  in tpm_show_ppi_request()
95 						"%llu\n", req);  in tpm_show_ppi_request()
97 	} else if (obj->package.count == 2 &&  in tpm_show_ppi_request()
98 	    obj->package.elements[0].type == ACPI_TYPE_INTEGER &&  in tpm_show_ppi_request()
99 	    obj->package.elements[1].type == ACPI_TYPE_INTEGER) {  in tpm_show_ppi_request()
100 		if (obj->package.elements[0].integer.value)  in tpm_show_ppi_request()
101 			size = -EFAULT;  in tpm_show_ppi_request()
103 			size = scnprintf(buf, PAGE_SIZE, "%llu\n",  in tpm_show_ppi_request()
104 				 obj->package.elements[1].integer.value);  in tpm_show_ppi_request()
125 	 * the function to submit TPM operation request to pre-os environment  in tpm_store_ppi_request()
129 	if (acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_guid,  in tpm_store_ppi_request()
135 	 * accept buffer/string/integer type, but some BIOS accept buffer/  in tpm_store_ppi_request()
139 	if (strcmp(chip->ppi_version, "1.3") == 0) {  in tpm_store_ppi_request()
140 		if (sscanf(buf, "%llu %llu", &tmp[0].integer.value,  in tpm_store_ppi_request()
141 			   &tmp[1].integer.value) != 2)  in tpm_store_ppi_request()
146 	} else if (strcmp(chip->ppi_version, "1.2") < 0) {  in tpm_store_ppi_request()
148 			return -EINVAL;  in tpm_store_ppi_request()
156 		if (sscanf(buf, "%llu", &tmp[0].integer.value) != 1)  in tpm_store_ppi_request()
157 			return -EINVAL;  in tpm_store_ppi_request()
160 	obj = tpm_eval_dsm(chip->acpi_dev_handle, func, ACPI_TYPE_INTEGER,  in tpm_store_ppi_request()
163 		return -ENXIO;  in tpm_store_ppi_request()
165 		ret = obj->integer.value;  in tpm_store_ppi_request()
172 	return (ret == 1) ? -EPERM : -EFAULT;  in tpm_store_ppi_request()
193 		"OS Vendor-specific",  in tpm_show_ppi_transition_action()
199 	 * (e.g. Capella with PPI 1.0) need integer/string/buffer type, so for  in tpm_show_ppi_transition_action()
202 	if (strcmp(chip->ppi_version, "1.2") < 0)  in tpm_show_ppi_transition_action()
204 	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETACT,  in tpm_show_ppi_transition_action()
207 		return -ENXIO;  in tpm_show_ppi_transition_action()
209 		ret = obj->integer.value;  in tpm_show_ppi_transition_action()
213 	if (ret < ARRAY_SIZE(info) - 1)  in tpm_show_ppi_transition_action()
214 		status = scnprintf(buf, PAGE_SIZE, "%d: %s\n", ret, info[ret]);  in tpm_show_ppi_transition_action()
216 		status = scnprintf(buf, PAGE_SIZE, "%d: %s\n", ret,  in tpm_show_ppi_transition_action()
217 				   info[ARRAY_SIZE(info)-1]);  in tpm_show_ppi_transition_action()
225 	acpi_status status = -EINVAL;  in tpm_show_ppi_response()
230 	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETRSP,  in tpm_show_ppi_response()
233 		return -ENXIO;  in tpm_show_ppi_response()
240 	 * the second integer is not 0, the response makes sense.  in tpm_show_ppi_response()
242 	ret_obj = obj->package.elements;  in tpm_show_ppi_response()
243 	if (obj->package.count < 3 ||  in tpm_show_ppi_response()
249 	if (ret_obj[0].integer.value) {  in tpm_show_ppi_response()
250 		status = -EFAULT;  in tpm_show_ppi_response()
254 	req = ret_obj[1].integer.value;  in tpm_show_ppi_response()
255 	res = ret_obj[2].integer.value;  in tpm_show_ppi_response()
258 			status = scnprintf(buf, PAGE_SIZE, "%llu %s\n", req,  in tpm_show_ppi_response()
261 			status = scnprintf(buf, PAGE_SIZE, "%llu %s\n", req,  in tpm_show_ppi_response()
264 			status = scnprintf(buf, PAGE_SIZE, "%llu %s\n", req,  in tpm_show_ppi_response()
267 			status = scnprintf(buf, PAGE_SIZE, "%llu %llu: %s\n",  in tpm_show_ppi_response()
270 			status = scnprintf(buf, PAGE_SIZE, "%llu %llu: %s\n",  in tpm_show_ppi_response()
273 		status = scnprintf(buf, PAGE_SIZE, "%llu: %s\n",  in tpm_show_ppi_response()
301 		return -EPERM;  in show_ppi_operations()
303 	tmp.integer.type = ACPI_TYPE_INTEGER;  in show_ppi_operations()
305 		tmp.integer.value = i;  in show_ppi_operations()
310 			return -ENOMEM;  in show_ppi_operations()
312 			ret = obj->integer.value;  in show_ppi_operations()
317 			str += scnprintf(str, PAGE_SIZE, "%d %d: %s\n",  in show_ppi_operations()
321 	return str - buf;  in show_ppi_operations()
330 	return show_ppi_operations(chip->acpi_dev_handle, buf, 0,  in tpm_show_ppi_tcg_operations()
340 	return show_ppi_operations(chip->acpi_dev_handle, buf, PPI_VS_REQ_START,  in tpm_show_ppi_vs_operations()
370 	if (!chip->acpi_dev_handle)  in tpm_add_ppi()
373 	if (!acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_guid,  in tpm_add_ppi()
378 	obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, &tpm_ppi_guid,  in tpm_add_ppi()
383 		strscpy(chip->ppi_version, obj->string.pointer,  in tpm_add_ppi()
384 			sizeof(chip->ppi_version));  in tpm_add_ppi()
388 	chip->groups[chip->groups_cnt++] = &ppi_attr_grp;  in tpm_add_ppi()