From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============4709030342133503482==" MIME-Version: 1.0 From: Al Stone Subject: [Devel] [PATCH] ACPICA: acpidump -- provide initial implementation for Linux Date: Fri, 31 May 2013 18:20:45 -0600 Message-ID: <51A93E5D.8010104@redhat.com> List-ID: To: devel@acpica.org --===============4709030342133503482== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable source/os_specific/service_layer/oslinuxtbl.c: provide implementations for AcpiOsGetTableByName and AcpiOsGetTableByIndex. With these two routines implemented, one can now run a Linux version of acpidump and dump tables by name, or by index. An implementation for dumping tables by address has not been provided. Signed-off-by: Al Stone --- source/os_specific/service_layers/oslinuxtbl.c | 415 = ++++++++++++++++++------- 1 file changed, 304 insertions(+), 111 deletions(-) diff --git a/source/os_specific/service_layers/oslinuxtbl.c = b/source/os_specific/service_layers/oslinuxtbl.c index f539693..4005e0d 100644 --- a/source/os_specific/service_layers/oslinuxtbl.c +++ b/source/os_specific/service_layers/oslinuxtbl.c @@ -4,123 +4,295 @@ * = ***************************************************************************= **/ -/*************************************************************************= ***** - * - * 1. Copyright Notice - * - * Some or all of this work - Copyright (c) 1999 - 2013, Intel Corp. +/* + * Copyright (C) 2000 - 2013, Intel Corp. * All rights reserved. * - * 2. License - * - * 2.1. This is your license from Intel Corp. under its intellectual = property - * rights. You may have additional license terms from the party that = provided - * you this software, covering your right to use that party's intellectual - * property rights. - * - * 2.2. Intel grants, free of charge, to any person ("Licensee") = obtaining a - * copy of the source code appearing in this file ("Covered Code") an - * irrevocable, perpetual, worldwide license under Intel's copyrights = in the - * base code distributed originally by Intel ("Original Intel Code") to = copy, - * make derivatives, distribute, use and display any portion of the Covered - * Code in any form, with the right to sublicense such rights; and - * - * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent - * license (with the right to sublicense), under only those claims of Intel - * patents that are infringed by the Original Intel Code, to make, use, = sell, - * offer to sell, and import the Covered Code and derivative works thereof - * solely to the minimum extent necessary to exercise the above copyright - * license, and in no event shall the patent license extend to any = additions - * to or modifications of the Original Intel Code. No other license or = right - * is granted directly or by implication, estoppel or otherwise; - * - * The above copyright and patent license is granted only if the following - * conditions are met: - * - * 3. Conditions - * - * 3.1. Redistribution of Source with Rights to Further Distribute Source. - * Redistribution of source code of any substantial portion of the Covered - * Code or modification with rights to further distribute source must = include - * the above Copyright Notice, the above License, this list of Conditions, - * and the following Disclaimer and Export Compliance provision. In = addition, - * Licensee must cause all Covered Code to which Licensee contributes to - * contain a file documenting the changes Licensee made to create that = Covered - * Code and the date of any change. Licensee must include in that file the - * documentation of any changes made by any predecessor Licensee. Licensee - * must include a prominent statement that the modification is derived, - * directly or indirectly, from Original Intel Code. - * - * 3.2. Redistribution of Source with no Rights to Further Distribute = Source. - * Redistribution of source code of any substantial portion of the Covered - * Code or modification without rights to further distribute source must - * include the following Disclaimer and Export Compliance provision in the - * documentation and/or other materials provided with distribution. In - * addition, Licensee may not authorize further sublicense of source of any - * portion of the Covered Code, and must include terms to the effect = that the - * license from Licensee to its licensee is limited to the intellectual - * property embodied in the software Licensee provides to its licensee, and - * not to intellectual property embodied in modifications its licensee may - * make. - * - * 3.3. Redistribution of Executable. Redistribution in executable form = of any - * substantial portion of the Covered Code or modification must = reproduce the - * above Copyright Notice, and the following Disclaimer and Export = Compliance - * provision in the documentation and/or other materials provided with the - * distribution. - * - * 3.4. Intel retains all right, title, and interest in and to the Original - * Intel Code. - * - * 3.5. Neither the name Intel nor any other trademark owned or = controlled by - * Intel shall be used in advertising or otherwise to promote the sale, = use or - * other dealings in products derived from or relating to the Covered Code - * without prior written authorization from Intel. - * - * 4. Disclaimer and Export Compliance - * - * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED - * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE - * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, - * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY - * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY - * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A - * PARTICULAR PURPOSE. - * - * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS = LICENSEES - * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF = USE OR - * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY = INDIRECT, - * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, = UNDER ANY - * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER = INTEL - * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS - * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY - * LIMITED REMEDY. - * - * 4.3. Licensee shall not export, either directly or indirectly, any = of this - * software or system incorporating such software without first = obtaining any - * required license or other approval from the U. S. Department of = Commerce or - * any other agency or department of the United States Government. In the - * event Licensee exports any such software from the United States or - * re-exports any such software from a foreign destination, Licensee shall - * ensure that the distribution and export/re-export of the software is in - * compliance with all laws, regulations, orders, or other restrictions = of the - * U.S. Export Administration Regulations. Licensee agrees that neither = it nor - * any of its subsidiaries will export/re-export any technical data, = process, - * software, or service, directly or indirectly, to any country for = which the - * United States government or any agency thereof requires an export = license, - * other governmental approval, or letter of assurance, without first = obtaining - * such license, approval or letter. - * - = ***************************************************************************= **/ + * Linux implementation (vs original module skeleton): + * Copyright (c) 2013, Al Stone + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products = derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * 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 MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. + */ #include "acpi.h" +#include #include #include +#include +#include +#include +#include #define _COMPONENT ACPI_OS_SERVICES ACPI_MODULE_NAME ("oslinuxtbl") +/* + * Linux specific code + * + * Read in all the tables we can find and put them in a nice table at + * startup so we don't have to keep doing searches for each table. + * + */ + +#define ACPI_OS_MAX_TABLE_INDEX 128 +#define MAX_SIG 5 +#define MAX_PATH 256 +#define MAX_BUF (128*1024) /* no table bigger than 128 KiB? */ +#define TABLE_HEADER 256 + +static int tables_found =3D 0; + +typedef struct table_info { + char *filename; + char signature[MAX_SIG]; + int instance; /* only for some tables */ + int dynamic; + ACPI_PHYSICAL_ADDRESS address; + int size; + unsigned char *data; +} TABLE_INFO; + +static TABLE_INFO acpi_tables[ACPI_OS_MAX_TABLE_INDEX]; +static int next_index =3D 0; + +/*************************************************************************= ***** + * + * FUNCTION: read_table + * + * PARAMETERS: fullpath - absolute path to /sys ACPI table + * + * RETURN: If the table can be read, returns 0; returns non-zero + * otherwise. + * + * DESCRIPTION: Read in the contents of an ACPI table as stored in + * /sys/firmware/acpi. Fill in the contents of an entry + * in acpi_tables with the size and data of the table. + * + = ***************************************************************************= **/ + +static int +read_table( + char *fullpath) +{ + static unsigned char buf[MAX_BUF]; + FILE *fd; + int result; + int cnt; + unsigned char *up; + + result =3D 1; + + /* read the table once to figure out it's size, then put it in a = buffer */ + memset(buf, 0, MAX_BUF); + fd =3D fopen(fullpath, "r"); + if (fd) + { + cnt =3D fread(buf, MAX_BUF, 1, fd); + if (feof(fd)) + { + cnt =3D ftell(fd); + up =3D (unsigned char *)malloc(cnt); + if (up) + { + memcpy(up, buf, cnt); + acpi_tables[next_index].size =3D cnt; + acpi_tables[next_index].data =3D up; + memcpy(acpi_tables[next_index].signature, up, 4); + result =3D 0; + } + } + fclose(fd); + } + else + { + fprintf(stderr, "Cannot open %s\n", fullpath); + } + return (result); +} + +/*************************************************************************= ***** + * + * FUNCTION: get_table_info + * + * PARAMETERS: dirpath - absolute path to a /sys/firmware/acpi + * directory + * + * RETURN: Status: AE_OK if all the ACPI tables in the directory + * given by dirpath can be read in. If not, AE_LIMIT will + * be returned if there is insufficient space for the table, + * and AE_ERROR otherwise. + * + * DESCRIPTION: Given a directory path in /sys, read in each of the files + * in that directory as an ACPI table. Store any information + * gathered about the table in an acpi_tables entry. + * + = ***************************************************************************= **/ + +static ACPI_STATUS +get_table_info( + char *dirpath) +{ + ACPI_STATUS result; + void *dir; + char *fpath; + char fullpath[MAX_PATH]; + int tmp; + char *p; + struct stat buf; + + result =3D AE_ERROR; + dir =3D AcpiOsOpenDirectory(dirpath, "*", REQUEST_FILE_ONLY); + if (dir) + { + fpath =3D AcpiOsGetNextFilename(dir); + while (fpath) + { + memset(fullpath, 0, MAX_PATH); + strcpy(fullpath, dirpath); + strcat(fullpath, "/"); + strcat(fullpath, fpath); + if (next_index >=3D ACPI_OS_MAX_TABLE_INDEX) + { + result =3D AE_LIMIT; + break; + } + else + { + tmp =3D strlen(fullpath) + 1; + p =3D (char *)malloc(tmp); + if (p) + { + memset(p, 0, tmp); + acpi_tables[next_index].filename =3D p; + } + else + { + result =3D AE_LIMIT; + break; + } + strcpy(acpi_tables[next_index].filename, fullpath); + + acpi_tables[next_index].dynamic =3D 0; + + if (strlen(fpath) > 4) + { + tmp =3D strtol(&(fpath[4]), NULL, 10); + acpi_tables[next_index].instance =3D tmp; + } + + if (stat(fullpath, &buf) =3D=3D 0) + { + if (read_table(fullpath) =3D=3D 0) + { + result =3D AE_OK; + } + else + { + result =3D AE_LIMIT; + break; + } + } + + next_index++; + } + fpath =3D AcpiOsGetNextFilename(dir); + } + + AcpiOsCloseDirectory(dir); + result =3D AE_OK; + } + else + { + result =3D AE_ERROR; + } + + return (result); +} + +/*************************************************************************= ***** + * + * FUNCTION: init_table_info + * + * PARAMETERS: none + * + * RETURN: Status: AE_OK if initialization was properly done. If + * it was not, an error status indicating what occurred. + * + * DESCRIPTION: This routine is called to set up a file global structure + * (acpi_tables) that will then be used by the other + * AcpiOsGetTableBy* routines to find and print out info + * about one of the current systems ACPI tables. The + * routine is also set up so that it should only do the + * heavy initialization work once on first being called. + * + = ***************************************************************************= **/ + +static ACPI_STATUS +init_table_info( + void) +{ + ACPI_STATUS result; + + if (tables_found) + return (AE_OK); + + /* must be superuser to read the tables */ + if (getuid() !=3D 0) + { + fprintf(stderr, "Must be run as superuser\n"); + return (AE_SUPPORT); + } + + /* basic initialization */ + memset(acpi_tables, 0, ACPI_OS_MAX_TABLE_INDEX * sizeof(TABLE_INFO)); + + /* + * Look for all the files in /sys/firmware/acpi/tables and in + * /sys/firmware/acpi/tables/dynamic; each one is a table. + */ + result =3D get_table_info("/sys/firmware/acpi/tables"); + if (result =3D=3D AE_OK) + { + result =3D get_table_info("/sys/firmware/acpi/tables/dynamic"); + } + + if (result =3D=3D AE_OK) + { + tables_found =3D 1; + } + return (result); +} = /**************************************************************************= **** * @@ -170,9 +342,16 @@ AcpiOsGetTableByIndex ( ACPI_TABLE_HEADER **Table, ACPI_PHYSICAL_ADDRESS *Address) { - - fprintf (stderr, "Linux version not implemented yet\n"); - return (AE_SUPPORT); + if (init_table_info() =3D=3D AE_OK) + { + if (Index < next_index) + { + *Table =3D (ACPI_TABLE_HEADER *)acpi_tables[Index].data; + *Address =3D 0; + return (AE_OK); + } + } + return (AE_LIMIT); } @@ -203,7 +382,21 @@ AcpiOsGetTableByName ( ACPI_TABLE_HEADER **Table, ACPI_PHYSICAL_ADDRESS *Address) { + int ii; - fprintf (stderr, "Linux version not implemented yet\n"); - return (AE_SUPPORT); + if (init_table_info() =3D=3D AE_OK) + { + for (ii =3D 0; ii < next_index; ii++) + { + if ((strncmp(Signature, acpi_tables[ii].signature, 4) =3D=3D 0) && + (acpi_tables[ii].instance =3D=3D Instance)) + { + *Table =3D (ACPI_TABLE_HEADER *)acpi_tables[ii].data; + *Address =3D 0; + return (AE_OK); + } + } + return (AE_LIMIT); + } + return (AE_NOT_FOUND); } -- = 1.8.1.4 -- = ciao, al ----------------------------------- Al Stone Software Engineer Red Hat, Inc. ahs3(a)redhat.com ----------------------------------- --===============4709030342133503482==--