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 sysfs_emit(buf, "%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()
90 				size = sysfs_emit(buf, "%llu %llu\n", req,  in tpm_show_ppi_request()
91 						  obj->package.elements[2].integer.value);  in tpm_show_ppi_request()
93 				size = sysfs_emit(buf, "%llu\n", req);  in tpm_show_ppi_request()
95 	} else if (obj->package.count == 2 &&  in tpm_show_ppi_request()
96 	    obj->package.elements[0].type == ACPI_TYPE_INTEGER &&  in tpm_show_ppi_request()
97 	    obj->package.elements[1].type == ACPI_TYPE_INTEGER) {  in tpm_show_ppi_request()
98 		if (obj->package.elements[0].integer.value)  in tpm_show_ppi_request()
99 			size = -EFAULT;  in tpm_show_ppi_request()
101 			size = sysfs_emit(buf, "%llu\n",  in tpm_show_ppi_request()
102 					  obj->package.elements[1].integer.value);  in tpm_show_ppi_request()
123 	 * the function to submit TPM operation request to pre-os environment  in tpm_store_ppi_request()
127 	if (acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_guid,  in tpm_store_ppi_request()
133 	 * accept buffer/string/integer type, but some BIOS accept buffer/  in tpm_store_ppi_request()
137 	if (strcmp(chip->ppi_version, "1.3") == 0) {  in tpm_store_ppi_request()
138 		if (sscanf(buf, "%llu %llu", &tmp[0].integer.value,  in tpm_store_ppi_request()
139 			   &tmp[1].integer.value) != 2)  in tpm_store_ppi_request()
144 	} else if (strcmp(chip->ppi_version, "1.2") < 0) {  in tpm_store_ppi_request()
146 			return -EINVAL;  in tpm_store_ppi_request()
154 		if (sscanf(buf, "%llu", &tmp[0].integer.value) != 1)  in tpm_store_ppi_request()
155 			return -EINVAL;  in tpm_store_ppi_request()
158 	obj = tpm_eval_dsm(chip->acpi_dev_handle, func, ACPI_TYPE_INTEGER,  in tpm_store_ppi_request()
161 		return -ENXIO;  in tpm_store_ppi_request()
163 		ret = obj->integer.value;  in tpm_store_ppi_request()
170 	return (ret == 1) ? -EPERM : -EFAULT;  in tpm_store_ppi_request()
191 		"OS Vendor-specific",  in tpm_show_ppi_transition_action()
197 	 * (e.g. Capella with PPI 1.0) need integer/string/buffer type, so for  in tpm_show_ppi_transition_action()
200 	if (strcmp(chip->ppi_version, "1.2") < 0)  in tpm_show_ppi_transition_action()
202 	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETACT,  in tpm_show_ppi_transition_action()
205 		return -ENXIO;  in tpm_show_ppi_transition_action()
207 		ret = obj->integer.value;  in tpm_show_ppi_transition_action()
211 	if (ret < ARRAY_SIZE(info) - 1)  in tpm_show_ppi_transition_action()
212 		status = sysfs_emit(buf, "%d: %s\n", ret, info[ret]);  in tpm_show_ppi_transition_action()
214 		status = sysfs_emit(buf, "%d: %s\n", ret,  in tpm_show_ppi_transition_action()
215 				    info[ARRAY_SIZE(info) - 1]);  in tpm_show_ppi_transition_action()
223 	acpi_status status = -EINVAL;  in tpm_show_ppi_response()
228 	obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETRSP,  in tpm_show_ppi_response()
231 		return -ENXIO;  in tpm_show_ppi_response()
238 	 * the second integer is not 0, the response makes sense.  in tpm_show_ppi_response()
240 	ret_obj = obj->package.elements;  in tpm_show_ppi_response()
241 	if (obj->package.count < 3 ||  in tpm_show_ppi_response()
247 	if (ret_obj[0].integer.value) {  in tpm_show_ppi_response()
248 		status = -EFAULT;  in tpm_show_ppi_response()
252 	req = ret_obj[1].integer.value;  in tpm_show_ppi_response()
253 	res = ret_obj[2].integer.value;  in tpm_show_ppi_response()
256 			status = sysfs_emit(buf, "%llu %s\n", req,  in tpm_show_ppi_response()
259 			status = sysfs_emit(buf, "%llu %s\n", req,  in tpm_show_ppi_response()
262 			status = sysfs_emit(buf, "%llu %s\n", req,  in tpm_show_ppi_response()
265 			status = sysfs_emit(buf, "%llu %llu: %s\n",  in tpm_show_ppi_response()
268 			status = sysfs_emit(buf, "%llu %llu: %s\n",  in tpm_show_ppi_response()
271 		status = sysfs_emit(buf, "%llu: %s\n",  in tpm_show_ppi_response()
299 		return -EPERM;  in show_ppi_operations()
301 	tmp.integer.type = ACPI_TYPE_INTEGER;  in show_ppi_operations()
303 		tmp.integer.value = i;  in show_ppi_operations()
308 			return -ENOMEM;  in show_ppi_operations()
310 			ret = obj->integer.value;  in show_ppi_operations()
315 			len += sysfs_emit_at(buf, len, "%d %d: %s\n",  in show_ppi_operations()
328 	return show_ppi_operations(chip->acpi_dev_handle, buf, 0,  in tpm_show_ppi_tcg_operations()
338 	return show_ppi_operations(chip->acpi_dev_handle, buf, PPI_VS_REQ_START,  in tpm_show_ppi_vs_operations()
368 	if (!chip->acpi_dev_handle)  in tpm_add_ppi()
371 	if (!acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_guid,  in tpm_add_ppi()
376 	obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, &tpm_ppi_guid,  in tpm_add_ppi()
381 		strscpy(chip->ppi_version, obj->string.pointer,  in tpm_add_ppi()
382 			sizeof(chip->ppi_version));  in tpm_add_ppi()
386 	chip->groups[chip->groups_cnt++] = &ppi_attr_grp;  in tpm_add_ppi()