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Message-Id: <5db171353261e2b20ebc78855057792a5a633699.1474485474.git.shuahkh@osg.samsung.com>
Date: Wed, 21 Sep 2016 13:47:30 -0600
From: Shuah Khan <shuahkh@....samsung.com>
To: corbet@....net, tomas.winkler@...el.com, tglx@...utronix.de,
clemens@...isch.de, wim@...ana.be, linux@...ck-us.net,
davem@...emloft.net, geert@...ux-m68k.org,
akpm@...ux-foundation.org, gregkh@...uxfoundation.org,
kvalo@...eaurora.org, mchehab@...nel.org, ghackmann@...gle.com,
ben@...adent.org.uk, maheshkhanwalkar@...il.com
Cc: Shuah Khan <shuahkh@....samsung.com>, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org
Subject: [PATCH v2 1/4] samples: move misc-devices/mei example code from Documentation
Move misc-devices/mei examples to samples/mei and remove it from
Documentation Makefile. Delete misc-devices/Makefile.
Create a new Makefile to build samples/mei. It can be built from top
level directory or from mei directory:
Run make -C samples/mei or cd samples/mei; make
Acked-by: Jonathan Corbet <corbet@....net>
Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
---
Documentation/Makefile | 2 +-
Documentation/misc-devices/Makefile | 1 -
Documentation/misc-devices/mei/.gitignore | 1 -
Documentation/misc-devices/mei/Makefile | 5 -
Documentation/misc-devices/mei/TODO | 2 -
Documentation/misc-devices/mei/mei-amt-version.c | 479 -----------------------
MAINTAINERS | 1 +
samples/mei/.gitignore | 1 +
samples/mei/Makefile | 9 +
samples/mei/TODO | 2 +
samples/mei/mei-amt-version.c | 479 +++++++++++++++++++++++
11 files changed, 493 insertions(+), 489 deletions(-)
delete mode 100644 Documentation/misc-devices/Makefile
delete mode 100644 Documentation/misc-devices/mei/.gitignore
delete mode 100644 Documentation/misc-devices/mei/Makefile
delete mode 100644 Documentation/misc-devices/mei/TODO
delete mode 100644 Documentation/misc-devices/mei/mei-amt-version.c
create mode 100644 samples/mei/.gitignore
create mode 100644 samples/mei/Makefile
create mode 100644 samples/mei/TODO
create mode 100644 samples/mei/mei-amt-version.c
diff --git a/Documentation/Makefile b/Documentation/Makefile
index 80b5bdc..3c2a207 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -1,2 +1,2 @@
subdir-y := accounting auxdisplay blackfin \
- laptops misc-devices pcmcia timers watchdog
+ laptops pcmcia timers watchdog
diff --git a/Documentation/misc-devices/Makefile b/Documentation/misc-devices/Makefile
deleted file mode 100644
index e2b7aa4..0000000
--- a/Documentation/misc-devices/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-subdir-y := mei
diff --git a/Documentation/misc-devices/mei/.gitignore b/Documentation/misc-devices/mei/.gitignore
deleted file mode 100644
index f356b81..0000000
--- a/Documentation/misc-devices/mei/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-mei-amt-version
diff --git a/Documentation/misc-devices/mei/Makefile b/Documentation/misc-devices/mei/Makefile
deleted file mode 100644
index d758047..0000000
--- a/Documentation/misc-devices/mei/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-# List of programs to build
-hostprogs-y := mei-amt-version
-HOSTCFLAGS_mei-amt-version.o += -I$(objtree)/usr/include
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
diff --git a/Documentation/misc-devices/mei/TODO b/Documentation/misc-devices/mei/TODO
deleted file mode 100644
index 6b3625d..0000000
--- a/Documentation/misc-devices/mei/TODO
+++ /dev/null
@@ -1,2 +0,0 @@
-TODO:
- - Cleanup and split the timer function
diff --git a/Documentation/misc-devices/mei/mei-amt-version.c b/Documentation/misc-devices/mei/mei-amt-version.c
deleted file mode 100644
index 57d0d87..0000000
--- a/Documentation/misc-devices/mei/mei-amt-version.c
+++ /dev/null
@@ -1,479 +0,0 @@
-/******************************************************************************
- * Intel Management Engine Interface (Intel MEI) Linux driver
- * Intel MEI Interface Header
- *
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2012 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
- * USA
- *
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * Contact Information:
- * Intel Corporation.
- * linux-mei@...ux.intel.com
- * http://www.intel.com
- *
- * BSD LICENSE
- *
- * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *****************************************************************************/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <unistd.h>
-#include <errno.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <bits/wordsize.h>
-#include <linux/mei.h>
-
-/*****************************************************************************
- * Intel Management Engine Interface
- *****************************************************************************/
-
-#define mei_msg(_me, fmt, ARGS...) do { \
- if (_me->verbose) \
- fprintf(stderr, fmt, ##ARGS); \
-} while (0)
-
-#define mei_err(_me, fmt, ARGS...) do { \
- fprintf(stderr, "Error: " fmt, ##ARGS); \
-} while (0)
-
-struct mei {
- uuid_le guid;
- bool initialized;
- bool verbose;
- unsigned int buf_size;
- unsigned char prot_ver;
- int fd;
-};
-
-static void mei_deinit(struct mei *cl)
-{
- if (cl->fd != -1)
- close(cl->fd);
- cl->fd = -1;
- cl->buf_size = 0;
- cl->prot_ver = 0;
- cl->initialized = false;
-}
-
-static bool mei_init(struct mei *me, const uuid_le *guid,
- unsigned char req_protocol_version, bool verbose)
-{
- int result;
- struct mei_client *cl;
- struct mei_connect_client_data data;
-
- me->verbose = verbose;
-
- me->fd = open("/dev/mei", O_RDWR);
- if (me->fd == -1) {
- mei_err(me, "Cannot establish a handle to the Intel MEI driver\n");
- goto err;
- }
- memcpy(&me->guid, guid, sizeof(*guid));
- memset(&data, 0, sizeof(data));
- me->initialized = true;
-
- memcpy(&data.in_client_uuid, &me->guid, sizeof(me->guid));
- result = ioctl(me->fd, IOCTL_MEI_CONNECT_CLIENT, &data);
- if (result) {
- mei_err(me, "IOCTL_MEI_CONNECT_CLIENT receive message. err=%d\n", result);
- goto err;
- }
- cl = &data.out_client_properties;
- mei_msg(me, "max_message_length %d\n", cl->max_msg_length);
- mei_msg(me, "protocol_version %d\n", cl->protocol_version);
-
- if ((req_protocol_version > 0) &&
- (cl->protocol_version != req_protocol_version)) {
- mei_err(me, "Intel MEI protocol version not supported\n");
- goto err;
- }
-
- me->buf_size = cl->max_msg_length;
- me->prot_ver = cl->protocol_version;
-
- return true;
-err:
- mei_deinit(me);
- return false;
-}
-
-static ssize_t mei_recv_msg(struct mei *me, unsigned char *buffer,
- ssize_t len, unsigned long timeout)
-{
- ssize_t rc;
-
- mei_msg(me, "call read length = %zd\n", len);
-
- rc = read(me->fd, buffer, len);
- if (rc < 0) {
- mei_err(me, "read failed with status %zd %s\n",
- rc, strerror(errno));
- mei_deinit(me);
- } else {
- mei_msg(me, "read succeeded with result %zd\n", rc);
- }
- return rc;
-}
-
-static ssize_t mei_send_msg(struct mei *me, const unsigned char *buffer,
- ssize_t len, unsigned long timeout)
-{
- struct timeval tv;
- ssize_t written;
- ssize_t rc;
- fd_set set;
-
- tv.tv_sec = timeout / 1000;
- tv.tv_usec = (timeout % 1000) * 1000000;
-
- mei_msg(me, "call write length = %zd\n", len);
-
- written = write(me->fd, buffer, len);
- if (written < 0) {
- rc = -errno;
- mei_err(me, "write failed with status %zd %s\n",
- written, strerror(errno));
- goto out;
- }
-
- FD_ZERO(&set);
- FD_SET(me->fd, &set);
- rc = select(me->fd + 1 , &set, NULL, NULL, &tv);
- if (rc > 0 && FD_ISSET(me->fd, &set)) {
- mei_msg(me, "write success\n");
- } else if (rc == 0) {
- mei_err(me, "write failed on timeout with status\n");
- goto out;
- } else { /* rc < 0 */
- mei_err(me, "write failed on select with status %zd\n", rc);
- goto out;
- }
-
- rc = written;
-out:
- if (rc < 0)
- mei_deinit(me);
-
- return rc;
-}
-
-/***************************************************************************
- * Intel Advanced Management Technology ME Client
- ***************************************************************************/
-
-#define AMT_MAJOR_VERSION 1
-#define AMT_MINOR_VERSION 1
-
-#define AMT_STATUS_SUCCESS 0x0
-#define AMT_STATUS_INTERNAL_ERROR 0x1
-#define AMT_STATUS_NOT_READY 0x2
-#define AMT_STATUS_INVALID_AMT_MODE 0x3
-#define AMT_STATUS_INVALID_MESSAGE_LENGTH 0x4
-
-#define AMT_STATUS_HOST_IF_EMPTY_RESPONSE 0x4000
-#define AMT_STATUS_SDK_RESOURCES 0x1004
-
-
-#define AMT_BIOS_VERSION_LEN 65
-#define AMT_VERSIONS_NUMBER 50
-#define AMT_UNICODE_STRING_LEN 20
-
-struct amt_unicode_string {
- uint16_t length;
- char string[AMT_UNICODE_STRING_LEN];
-} __attribute__((packed));
-
-struct amt_version_type {
- struct amt_unicode_string description;
- struct amt_unicode_string version;
-} __attribute__((packed));
-
-struct amt_version {
- uint8_t major;
- uint8_t minor;
-} __attribute__((packed));
-
-struct amt_code_versions {
- uint8_t bios[AMT_BIOS_VERSION_LEN];
- uint32_t count;
- struct amt_version_type versions[AMT_VERSIONS_NUMBER];
-} __attribute__((packed));
-
-/***************************************************************************
- * Intel Advanced Management Technology Host Interface
- ***************************************************************************/
-
-struct amt_host_if_msg_header {
- struct amt_version version;
- uint16_t _reserved;
- uint32_t command;
- uint32_t length;
-} __attribute__((packed));
-
-struct amt_host_if_resp_header {
- struct amt_host_if_msg_header header;
- uint32_t status;
- unsigned char data[0];
-} __attribute__((packed));
-
-const uuid_le MEI_IAMTHIF = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, \
- 0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c);
-
-#define AMT_HOST_IF_CODE_VERSIONS_REQUEST 0x0400001A
-#define AMT_HOST_IF_CODE_VERSIONS_RESPONSE 0x0480001A
-
-const struct amt_host_if_msg_header CODE_VERSION_REQ = {
- .version = {AMT_MAJOR_VERSION, AMT_MINOR_VERSION},
- ._reserved = 0,
- .command = AMT_HOST_IF_CODE_VERSIONS_REQUEST,
- .length = 0
-};
-
-
-struct amt_host_if {
- struct mei mei_cl;
- unsigned long send_timeout;
- bool initialized;
-};
-
-
-static bool amt_host_if_init(struct amt_host_if *acmd,
- unsigned long send_timeout, bool verbose)
-{
- acmd->send_timeout = (send_timeout) ? send_timeout : 20000;
- acmd->initialized = mei_init(&acmd->mei_cl, &MEI_IAMTHIF, 0, verbose);
- return acmd->initialized;
-}
-
-static void amt_host_if_deinit(struct amt_host_if *acmd)
-{
- mei_deinit(&acmd->mei_cl);
- acmd->initialized = false;
-}
-
-static uint32_t amt_verify_code_versions(const struct amt_host_if_resp_header *resp)
-{
- uint32_t status = AMT_STATUS_SUCCESS;
- struct amt_code_versions *code_ver;
- size_t code_ver_len;
- uint32_t ver_type_cnt;
- uint32_t len;
- uint32_t i;
-
- code_ver = (struct amt_code_versions *)resp->data;
- /* length - sizeof(status) */
- code_ver_len = resp->header.length - sizeof(uint32_t);
- ver_type_cnt = code_ver_len -
- sizeof(code_ver->bios) -
- sizeof(code_ver->count);
- if (code_ver->count != ver_type_cnt / sizeof(struct amt_version_type)) {
- status = AMT_STATUS_INTERNAL_ERROR;
- goto out;
- }
-
- for (i = 0; i < code_ver->count; i++) {
- len = code_ver->versions[i].description.length;
-
- if (len > AMT_UNICODE_STRING_LEN) {
- status = AMT_STATUS_INTERNAL_ERROR;
- goto out;
- }
-
- len = code_ver->versions[i].version.length;
- if (code_ver->versions[i].version.string[len] != '\0' ||
- len != strlen(code_ver->versions[i].version.string)) {
- status = AMT_STATUS_INTERNAL_ERROR;
- goto out;
- }
- }
-out:
- return status;
-}
-
-static uint32_t amt_verify_response_header(uint32_t command,
- const struct amt_host_if_msg_header *resp_hdr,
- uint32_t response_size)
-{
- if (response_size < sizeof(struct amt_host_if_resp_header)) {
- return AMT_STATUS_INTERNAL_ERROR;
- } else if (response_size != (resp_hdr->length +
- sizeof(struct amt_host_if_msg_header))) {
- return AMT_STATUS_INTERNAL_ERROR;
- } else if (resp_hdr->command != command) {
- return AMT_STATUS_INTERNAL_ERROR;
- } else if (resp_hdr->_reserved != 0) {
- return AMT_STATUS_INTERNAL_ERROR;
- } else if (resp_hdr->version.major != AMT_MAJOR_VERSION ||
- resp_hdr->version.minor < AMT_MINOR_VERSION) {
- return AMT_STATUS_INTERNAL_ERROR;
- }
- return AMT_STATUS_SUCCESS;
-}
-
-static uint32_t amt_host_if_call(struct amt_host_if *acmd,
- const unsigned char *command, ssize_t command_sz,
- uint8_t **read_buf, uint32_t rcmd,
- unsigned int expected_sz)
-{
- uint32_t in_buf_sz;
- uint32_t out_buf_sz;
- ssize_t written;
- uint32_t status;
- struct amt_host_if_resp_header *msg_hdr;
-
- in_buf_sz = acmd->mei_cl.buf_size;
- *read_buf = (uint8_t *)malloc(sizeof(uint8_t) * in_buf_sz);
- if (*read_buf == NULL)
- return AMT_STATUS_SDK_RESOURCES;
- memset(*read_buf, 0, in_buf_sz);
- msg_hdr = (struct amt_host_if_resp_header *)*read_buf;
-
- written = mei_send_msg(&acmd->mei_cl,
- command, command_sz, acmd->send_timeout);
- if (written != command_sz)
- return AMT_STATUS_INTERNAL_ERROR;
-
- out_buf_sz = mei_recv_msg(&acmd->mei_cl, *read_buf, in_buf_sz, 2000);
- if (out_buf_sz <= 0)
- return AMT_STATUS_HOST_IF_EMPTY_RESPONSE;
-
- status = msg_hdr->status;
- if (status != AMT_STATUS_SUCCESS)
- return status;
-
- status = amt_verify_response_header(rcmd,
- &msg_hdr->header, out_buf_sz);
- if (status != AMT_STATUS_SUCCESS)
- return status;
-
- if (expected_sz && expected_sz != out_buf_sz)
- return AMT_STATUS_INTERNAL_ERROR;
-
- return AMT_STATUS_SUCCESS;
-}
-
-
-static uint32_t amt_get_code_versions(struct amt_host_if *cmd,
- struct amt_code_versions *versions)
-{
- struct amt_host_if_resp_header *response = NULL;
- uint32_t status;
-
- status = amt_host_if_call(cmd,
- (const unsigned char *)&CODE_VERSION_REQ,
- sizeof(CODE_VERSION_REQ),
- (uint8_t **)&response,
- AMT_HOST_IF_CODE_VERSIONS_RESPONSE, 0);
-
- if (status != AMT_STATUS_SUCCESS)
- goto out;
-
- status = amt_verify_code_versions(response);
- if (status != AMT_STATUS_SUCCESS)
- goto out;
-
- memcpy(versions, response->data, sizeof(struct amt_code_versions));
-out:
- if (response != NULL)
- free(response);
-
- return status;
-}
-
-/************************** end of amt_host_if_command ***********************/
-int main(int argc, char **argv)
-{
- struct amt_code_versions ver;
- struct amt_host_if acmd;
- unsigned int i;
- uint32_t status;
- int ret;
- bool verbose;
-
- verbose = (argc > 1 && strcmp(argv[1], "-v") == 0);
-
- if (!amt_host_if_init(&acmd, 5000, verbose)) {
- ret = 1;
- goto out;
- }
-
- status = amt_get_code_versions(&acmd, &ver);
-
- amt_host_if_deinit(&acmd);
-
- switch (status) {
- case AMT_STATUS_HOST_IF_EMPTY_RESPONSE:
- printf("Intel AMT: DISABLED\n");
- ret = 0;
- break;
- case AMT_STATUS_SUCCESS:
- printf("Intel AMT: ENABLED\n");
- for (i = 0; i < ver.count; i++) {
- printf("%s:\t%s\n", ver.versions[i].description.string,
- ver.versions[i].version.string);
- }
- ret = 0;
- break;
- default:
- printf("An error has occurred\n");
- ret = 1;
- break;
- }
-
-out:
- return ret;
-}
diff --git a/MAINTAINERS b/MAINTAINERS
index a5e1270..afd3577 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6261,6 +6261,7 @@ F: include/linux/mei_cl_bus.h
F: drivers/misc/mei/*
F: drivers/watchdog/mei_wdt.c
F: Documentation/misc-devices/mei/*
+F: samples/mei/*
INTEL MIC DRIVERS (mic)
M: Sudeep Dutt <sudeep.dutt@...el.com>
diff --git a/samples/mei/.gitignore b/samples/mei/.gitignore
new file mode 100644
index 0000000..f356b81
--- /dev/null
+++ b/samples/mei/.gitignore
@@ -0,0 +1 @@
+mei-amt-version
diff --git a/samples/mei/Makefile b/samples/mei/Makefile
new file mode 100644
index 0000000..7aac216
--- /dev/null
+++ b/samples/mei/Makefile
@@ -0,0 +1,9 @@
+CC := $(CROSS_COMPILE)gcc
+CFLAGS := -I../../usr/include
+
+PROGS := mei-amt-version
+
+all: $(PROGS)
+
+clean:
+ rm -fr $(PROGS)
diff --git a/samples/mei/TODO b/samples/mei/TODO
new file mode 100644
index 0000000..6b3625d
--- /dev/null
+++ b/samples/mei/TODO
@@ -0,0 +1,2 @@
+TODO:
+ - Cleanup and split the timer function
diff --git a/samples/mei/mei-amt-version.c b/samples/mei/mei-amt-version.c
new file mode 100644
index 0000000..57d0d87
--- /dev/null
+++ b/samples/mei/mei-amt-version.c
@@ -0,0 +1,479 @@
+/******************************************************************************
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Intel MEI Interface Header
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ * Intel Corporation.
+ * linux-mei@...ux.intel.com
+ * http://www.intel.com
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <bits/wordsize.h>
+#include <linux/mei.h>
+
+/*****************************************************************************
+ * Intel Management Engine Interface
+ *****************************************************************************/
+
+#define mei_msg(_me, fmt, ARGS...) do { \
+ if (_me->verbose) \
+ fprintf(stderr, fmt, ##ARGS); \
+} while (0)
+
+#define mei_err(_me, fmt, ARGS...) do { \
+ fprintf(stderr, "Error: " fmt, ##ARGS); \
+} while (0)
+
+struct mei {
+ uuid_le guid;
+ bool initialized;
+ bool verbose;
+ unsigned int buf_size;
+ unsigned char prot_ver;
+ int fd;
+};
+
+static void mei_deinit(struct mei *cl)
+{
+ if (cl->fd != -1)
+ close(cl->fd);
+ cl->fd = -1;
+ cl->buf_size = 0;
+ cl->prot_ver = 0;
+ cl->initialized = false;
+}
+
+static bool mei_init(struct mei *me, const uuid_le *guid,
+ unsigned char req_protocol_version, bool verbose)
+{
+ int result;
+ struct mei_client *cl;
+ struct mei_connect_client_data data;
+
+ me->verbose = verbose;
+
+ me->fd = open("/dev/mei", O_RDWR);
+ if (me->fd == -1) {
+ mei_err(me, "Cannot establish a handle to the Intel MEI driver\n");
+ goto err;
+ }
+ memcpy(&me->guid, guid, sizeof(*guid));
+ memset(&data, 0, sizeof(data));
+ me->initialized = true;
+
+ memcpy(&data.in_client_uuid, &me->guid, sizeof(me->guid));
+ result = ioctl(me->fd, IOCTL_MEI_CONNECT_CLIENT, &data);
+ if (result) {
+ mei_err(me, "IOCTL_MEI_CONNECT_CLIENT receive message. err=%d\n", result);
+ goto err;
+ }
+ cl = &data.out_client_properties;
+ mei_msg(me, "max_message_length %d\n", cl->max_msg_length);
+ mei_msg(me, "protocol_version %d\n", cl->protocol_version);
+
+ if ((req_protocol_version > 0) &&
+ (cl->protocol_version != req_protocol_version)) {
+ mei_err(me, "Intel MEI protocol version not supported\n");
+ goto err;
+ }
+
+ me->buf_size = cl->max_msg_length;
+ me->prot_ver = cl->protocol_version;
+
+ return true;
+err:
+ mei_deinit(me);
+ return false;
+}
+
+static ssize_t mei_recv_msg(struct mei *me, unsigned char *buffer,
+ ssize_t len, unsigned long timeout)
+{
+ ssize_t rc;
+
+ mei_msg(me, "call read length = %zd\n", len);
+
+ rc = read(me->fd, buffer, len);
+ if (rc < 0) {
+ mei_err(me, "read failed with status %zd %s\n",
+ rc, strerror(errno));
+ mei_deinit(me);
+ } else {
+ mei_msg(me, "read succeeded with result %zd\n", rc);
+ }
+ return rc;
+}
+
+static ssize_t mei_send_msg(struct mei *me, const unsigned char *buffer,
+ ssize_t len, unsigned long timeout)
+{
+ struct timeval tv;
+ ssize_t written;
+ ssize_t rc;
+ fd_set set;
+
+ tv.tv_sec = timeout / 1000;
+ tv.tv_usec = (timeout % 1000) * 1000000;
+
+ mei_msg(me, "call write length = %zd\n", len);
+
+ written = write(me->fd, buffer, len);
+ if (written < 0) {
+ rc = -errno;
+ mei_err(me, "write failed with status %zd %s\n",
+ written, strerror(errno));
+ goto out;
+ }
+
+ FD_ZERO(&set);
+ FD_SET(me->fd, &set);
+ rc = select(me->fd + 1 , &set, NULL, NULL, &tv);
+ if (rc > 0 && FD_ISSET(me->fd, &set)) {
+ mei_msg(me, "write success\n");
+ } else if (rc == 0) {
+ mei_err(me, "write failed on timeout with status\n");
+ goto out;
+ } else { /* rc < 0 */
+ mei_err(me, "write failed on select with status %zd\n", rc);
+ goto out;
+ }
+
+ rc = written;
+out:
+ if (rc < 0)
+ mei_deinit(me);
+
+ return rc;
+}
+
+/***************************************************************************
+ * Intel Advanced Management Technology ME Client
+ ***************************************************************************/
+
+#define AMT_MAJOR_VERSION 1
+#define AMT_MINOR_VERSION 1
+
+#define AMT_STATUS_SUCCESS 0x0
+#define AMT_STATUS_INTERNAL_ERROR 0x1
+#define AMT_STATUS_NOT_READY 0x2
+#define AMT_STATUS_INVALID_AMT_MODE 0x3
+#define AMT_STATUS_INVALID_MESSAGE_LENGTH 0x4
+
+#define AMT_STATUS_HOST_IF_EMPTY_RESPONSE 0x4000
+#define AMT_STATUS_SDK_RESOURCES 0x1004
+
+
+#define AMT_BIOS_VERSION_LEN 65
+#define AMT_VERSIONS_NUMBER 50
+#define AMT_UNICODE_STRING_LEN 20
+
+struct amt_unicode_string {
+ uint16_t length;
+ char string[AMT_UNICODE_STRING_LEN];
+} __attribute__((packed));
+
+struct amt_version_type {
+ struct amt_unicode_string description;
+ struct amt_unicode_string version;
+} __attribute__((packed));
+
+struct amt_version {
+ uint8_t major;
+ uint8_t minor;
+} __attribute__((packed));
+
+struct amt_code_versions {
+ uint8_t bios[AMT_BIOS_VERSION_LEN];
+ uint32_t count;
+ struct amt_version_type versions[AMT_VERSIONS_NUMBER];
+} __attribute__((packed));
+
+/***************************************************************************
+ * Intel Advanced Management Technology Host Interface
+ ***************************************************************************/
+
+struct amt_host_if_msg_header {
+ struct amt_version version;
+ uint16_t _reserved;
+ uint32_t command;
+ uint32_t length;
+} __attribute__((packed));
+
+struct amt_host_if_resp_header {
+ struct amt_host_if_msg_header header;
+ uint32_t status;
+ unsigned char data[0];
+} __attribute__((packed));
+
+const uuid_le MEI_IAMTHIF = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, \
+ 0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c);
+
+#define AMT_HOST_IF_CODE_VERSIONS_REQUEST 0x0400001A
+#define AMT_HOST_IF_CODE_VERSIONS_RESPONSE 0x0480001A
+
+const struct amt_host_if_msg_header CODE_VERSION_REQ = {
+ .version = {AMT_MAJOR_VERSION, AMT_MINOR_VERSION},
+ ._reserved = 0,
+ .command = AMT_HOST_IF_CODE_VERSIONS_REQUEST,
+ .length = 0
+};
+
+
+struct amt_host_if {
+ struct mei mei_cl;
+ unsigned long send_timeout;
+ bool initialized;
+};
+
+
+static bool amt_host_if_init(struct amt_host_if *acmd,
+ unsigned long send_timeout, bool verbose)
+{
+ acmd->send_timeout = (send_timeout) ? send_timeout : 20000;
+ acmd->initialized = mei_init(&acmd->mei_cl, &MEI_IAMTHIF, 0, verbose);
+ return acmd->initialized;
+}
+
+static void amt_host_if_deinit(struct amt_host_if *acmd)
+{
+ mei_deinit(&acmd->mei_cl);
+ acmd->initialized = false;
+}
+
+static uint32_t amt_verify_code_versions(const struct amt_host_if_resp_header *resp)
+{
+ uint32_t status = AMT_STATUS_SUCCESS;
+ struct amt_code_versions *code_ver;
+ size_t code_ver_len;
+ uint32_t ver_type_cnt;
+ uint32_t len;
+ uint32_t i;
+
+ code_ver = (struct amt_code_versions *)resp->data;
+ /* length - sizeof(status) */
+ code_ver_len = resp->header.length - sizeof(uint32_t);
+ ver_type_cnt = code_ver_len -
+ sizeof(code_ver->bios) -
+ sizeof(code_ver->count);
+ if (code_ver->count != ver_type_cnt / sizeof(struct amt_version_type)) {
+ status = AMT_STATUS_INTERNAL_ERROR;
+ goto out;
+ }
+
+ for (i = 0; i < code_ver->count; i++) {
+ len = code_ver->versions[i].description.length;
+
+ if (len > AMT_UNICODE_STRING_LEN) {
+ status = AMT_STATUS_INTERNAL_ERROR;
+ goto out;
+ }
+
+ len = code_ver->versions[i].version.length;
+ if (code_ver->versions[i].version.string[len] != '\0' ||
+ len != strlen(code_ver->versions[i].version.string)) {
+ status = AMT_STATUS_INTERNAL_ERROR;
+ goto out;
+ }
+ }
+out:
+ return status;
+}
+
+static uint32_t amt_verify_response_header(uint32_t command,
+ const struct amt_host_if_msg_header *resp_hdr,
+ uint32_t response_size)
+{
+ if (response_size < sizeof(struct amt_host_if_resp_header)) {
+ return AMT_STATUS_INTERNAL_ERROR;
+ } else if (response_size != (resp_hdr->length +
+ sizeof(struct amt_host_if_msg_header))) {
+ return AMT_STATUS_INTERNAL_ERROR;
+ } else if (resp_hdr->command != command) {
+ return AMT_STATUS_INTERNAL_ERROR;
+ } else if (resp_hdr->_reserved != 0) {
+ return AMT_STATUS_INTERNAL_ERROR;
+ } else if (resp_hdr->version.major != AMT_MAJOR_VERSION ||
+ resp_hdr->version.minor < AMT_MINOR_VERSION) {
+ return AMT_STATUS_INTERNAL_ERROR;
+ }
+ return AMT_STATUS_SUCCESS;
+}
+
+static uint32_t amt_host_if_call(struct amt_host_if *acmd,
+ const unsigned char *command, ssize_t command_sz,
+ uint8_t **read_buf, uint32_t rcmd,
+ unsigned int expected_sz)
+{
+ uint32_t in_buf_sz;
+ uint32_t out_buf_sz;
+ ssize_t written;
+ uint32_t status;
+ struct amt_host_if_resp_header *msg_hdr;
+
+ in_buf_sz = acmd->mei_cl.buf_size;
+ *read_buf = (uint8_t *)malloc(sizeof(uint8_t) * in_buf_sz);
+ if (*read_buf == NULL)
+ return AMT_STATUS_SDK_RESOURCES;
+ memset(*read_buf, 0, in_buf_sz);
+ msg_hdr = (struct amt_host_if_resp_header *)*read_buf;
+
+ written = mei_send_msg(&acmd->mei_cl,
+ command, command_sz, acmd->send_timeout);
+ if (written != command_sz)
+ return AMT_STATUS_INTERNAL_ERROR;
+
+ out_buf_sz = mei_recv_msg(&acmd->mei_cl, *read_buf, in_buf_sz, 2000);
+ if (out_buf_sz <= 0)
+ return AMT_STATUS_HOST_IF_EMPTY_RESPONSE;
+
+ status = msg_hdr->status;
+ if (status != AMT_STATUS_SUCCESS)
+ return status;
+
+ status = amt_verify_response_header(rcmd,
+ &msg_hdr->header, out_buf_sz);
+ if (status != AMT_STATUS_SUCCESS)
+ return status;
+
+ if (expected_sz && expected_sz != out_buf_sz)
+ return AMT_STATUS_INTERNAL_ERROR;
+
+ return AMT_STATUS_SUCCESS;
+}
+
+
+static uint32_t amt_get_code_versions(struct amt_host_if *cmd,
+ struct amt_code_versions *versions)
+{
+ struct amt_host_if_resp_header *response = NULL;
+ uint32_t status;
+
+ status = amt_host_if_call(cmd,
+ (const unsigned char *)&CODE_VERSION_REQ,
+ sizeof(CODE_VERSION_REQ),
+ (uint8_t **)&response,
+ AMT_HOST_IF_CODE_VERSIONS_RESPONSE, 0);
+
+ if (status != AMT_STATUS_SUCCESS)
+ goto out;
+
+ status = amt_verify_code_versions(response);
+ if (status != AMT_STATUS_SUCCESS)
+ goto out;
+
+ memcpy(versions, response->data, sizeof(struct amt_code_versions));
+out:
+ if (response != NULL)
+ free(response);
+
+ return status;
+}
+
+/************************** end of amt_host_if_command ***********************/
+int main(int argc, char **argv)
+{
+ struct amt_code_versions ver;
+ struct amt_host_if acmd;
+ unsigned int i;
+ uint32_t status;
+ int ret;
+ bool verbose;
+
+ verbose = (argc > 1 && strcmp(argv[1], "-v") == 0);
+
+ if (!amt_host_if_init(&acmd, 5000, verbose)) {
+ ret = 1;
+ goto out;
+ }
+
+ status = amt_get_code_versions(&acmd, &ver);
+
+ amt_host_if_deinit(&acmd);
+
+ switch (status) {
+ case AMT_STATUS_HOST_IF_EMPTY_RESPONSE:
+ printf("Intel AMT: DISABLED\n");
+ ret = 0;
+ break;
+ case AMT_STATUS_SUCCESS:
+ printf("Intel AMT: ENABLED\n");
+ for (i = 0; i < ver.count; i++) {
+ printf("%s:\t%s\n", ver.versions[i].description.string,
+ ver.versions[i].version.string);
+ }
+ ret = 0;
+ break;
+ default:
+ printf("An error has occurred\n");
+ ret = 1;
+ break;
+ }
+
+out:
+ return ret;
+}
--
2.7.4
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