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Date: Wed, 21 Sep 2016 21:00:54 +0000
From: "Winkler, Tomas" <tomas.winkler@...el.com>
To: Shuah Khan <shuahkh@....samsung.com>,
"corbet@....net" <corbet@....net>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"clemens@...isch.de" <clemens@...isch.de>,
"wim@...ana.be" <wim@...ana.be>,
"linux@...ck-us.net" <linux@...ck-us.net>,
"davem@...emloft.net" <davem@...emloft.net>,
"geert@...ux-m68k.org" <geert@...ux-m68k.org>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"kvalo@...eaurora.org" <kvalo@...eaurora.org>,
"mchehab@...nel.org" <mchehab@...nel.org>,
"ghackmann@...gle.com" <ghackmann@...gle.com>,
"ben@...adent.org.uk" <ben@...adent.org.uk>,
"maheshkhanwalkar@...il.com" <maheshkhanwalkar@...il.com>
CC: "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>
Subject: RE: [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>
Acked-by: Tomas Winkler <tomas.winkler@...el.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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