/* * pcidump.c --  a tool to decode /proc/pcidata * * Tested with 2.0 on the x86 * Tested with 2.1.43 in the x86 * */#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <fcntl.h>#include <errno.h>#include <sys/types.h>#include <sys/stat.h>#include <linux/pci.h>#include <asm/page.h>#include <linux/version.h>/* * Refuse to compile under versions older than 1.99.4 */#define VERSION_CODE(vers,rel,seq) ( ((vers)<<16) | ((rel)<<8) | (seq) )#if LINUX_VERSION_CODE < VERSION_CODE(1,99,4)#  error "This module needs Linux 1.99.4 or newer"#else/* A structure to declare how data is decoded */struct pcidump_info {    int offset; /* the data item to retrieve */    unsigned long bitmask;    int bool; /* true or false */    char *string;};#define ONEBYTE 0xFF#define TWOBYTES 0xFFFF#define FOURBYTES 0xFFFFFFFFstruct pcidump_info dumpinfo[] = {    {0,                    0,                       0, "\tCompulsory registers:\n"},    {PCI_VENDOR_ID,        TWOBYTES,                0, "Vendor id: %04x\n"},    {PCI_DEVICE_ID,        TWOBYTES,                0, "Device id: %04x\n"},    {PCI_COMMAND,          PCI_COMMAND_IO,          1, "I/O space enabled: %c\n"},    {PCI_COMMAND,          PCI_COMMAND_MEMORY,      1, "Memory enabled: %c\n"},    {PCI_COMMAND,          PCI_COMMAND_MASTER,      1, "Master enabled: %c\n"},    {PCI_COMMAND,          PCI_COMMAND_SPECIAL,     1, "Special command enabled: %c\n"},    {PCI_COMMAND,          PCI_COMMAND_INVALIDATE,  1, "Write-invalidate enabled: %c\n"},    {PCI_COMMAND,          PCI_COMMAND_VGA_PALETTE, 1, "Palette-snoop enabled: %c\n"},    {PCI_COMMAND,          PCI_COMMAND_PARITY,      1, "Parity enabled: %c\n"},    {PCI_COMMAND,          PCI_COMMAND_WAIT,        1, "Wait-cycle enabled: %c\n"},    {PCI_COMMAND,          PCI_COMMAND_SERR,        1, "System-error enabled: %c\n"},    {PCI_COMMAND,          PCI_COMMAND_FAST_BACK,   1, "Fast-back-to-back enabled: %c\n"},    {PCI_STATUS,           PCI_STATUS_66MHZ,        1, "Can do 66MHz: %c\n"},    {PCI_STATUS,           PCI_STATUS_UDF,          1, "Supports User Defined Features: %c\n"},    {PCI_STATUS,           PCI_STATUS_FAST_BACK,    1, "Fast-back-to-back capable: %c\n"},    {PCI_STATUS,           PCI_STATUS_PARITY,        1, "Data Parity Reported: %c\n"},    {PCI_STATUS,           PCI_STATUS_DEVSEL_MASK,    0, "Device Select Timing bits are %x\n"},    {PCI_STATUS,           PCI_STATUS_SIG_TARGET_ABORT,1, "Signalled abort as target: %c\n"},    {PCI_STATUS,           PCI_STATUS_REC_TARGET_ABORT, 1, "Received abort from target: %c\n"},    {PCI_STATUS,           PCI_STATUS_REC_MASTER_ABORT, 1, "Aborted transaction as master: %c\n"},    {PCI_STATUS,           PCI_STATUS_SIG_SYSTEM_ERROR, 1, "Did send a system error: %c\n"},    {PCI_STATUS,           PCI_STATUS_DETECTED_PARITY, 1, "Detected a parity error: %c\n"},    {PCI_REVISION_ID,      ONEBYTE,                   0, "Revision id (decimal): %i\n"},    {PCI_CLASS_PROG,       ONEBYTE,                  0, "Programmer Interface: %02x\n"},    {PCI_CLASS_DEVICE,     TWOBYTES,                0, "Class of device: %04x\n"},    {PCI_HEADER_TYPE,      0x7f,                    0, "Header type: %02x\n"},    {PCI_HEADER_TYPE,      0x80,                    1, "Multi function device: %c\n"},    {0,                    0,                       0, "\tOptional registers:\n"},    {PCI_CACHE_LINE_SIZE,  ONEBYTE,                 0, "Cache line size (decimal): %i\n"},    {PCI_LATENCY_TIMER,    ONEBYTE,                 0, "Latency timer (decimal): %i\n"},    {PCI_BIST,             PCI_BIST_CAPABLE,        1, "Is Built-In-Self-Test available: %c\n"},    {PCI_BIST,             PCI_BIST_CODE_MASK,      1, "Did Built-In-Self-Test fail: %c\n"},    {PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_MEM_MASK,  0, "Base Address 0: %08x\n"},    {PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_SPACE,      1, "Base Address 0 Is I/O: %c\n"},    {PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_MEM_TYPE_64, 1, "Base Address 0 is 64-bits: %c\n"},    {PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_MEM_TYPE_1M,  1, "Base Address 0 is below-1M: %c\n"},    {PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_MEM_PREFETCH, 1, "Base Address 0 is prefetchable: %c\n"},    {PCI_BASE_ADDRESS_1, PCI_BASE_ADDRESS_MEM_MASK,     0, "Base Address 1: %08x\n"},    {PCI_BASE_ADDRESS_1, PCI_BASE_ADDRESS_SPACE,        1, "Base Address 1 Is I/O: %c\n"},    {PCI_BASE_ADDRESS_1, PCI_BASE_ADDRESS_MEM_TYPE_64,  1, "Base Address 1 is 64-bits: %c\n"},    {PCI_BASE_ADDRESS_1, PCI_BASE_ADDRESS_MEM_TYPE_1M,  1, "Base Address 1 is below-1M: %c\n"},    {PCI_BASE_ADDRESS_1, PCI_BASE_ADDRESS_MEM_PREFETCH, 1, "Base Address 1 is prefetchable: %c\n"},#if 0#define PCI_BASE_ADDRESS_2      0x18    /* 32 bits */#define PCI_BASE_ADDRESS_3      0x1c    /* 32 bits */#define PCI_BASE_ADDRESS_4      0x20    /* 32 bits */#define PCI_BASE_ADDRESS_5      0x24    /* 32 bits */#define PCI_CARDBUS_CIS         0x28#endif    {PCI_SUBSYSTEM_ID,        TWOBYTES,                0, "Subsystem id: %04x\n"},    {PCI_SUBSYSTEM_VENDOR_ID, TWOBYTES,                0, "Subsystem vendor: %04x\n"},    {PCI_ROM_ADDRESS,         ~0x7FF,                  0, "Rom address: %08x\n"},    {PCI_ROM_ADDRESS,         PCI_ROM_ADDRESS_ENABLE,  1, "Rom is enabled: %c\n"},    {PCI_INTERRUPT_PIN,       ONEBYTE,                 1, "Does generate interrupts: %c\n"},    {PCI_INTERRUPT_LINE,      ONEBYTE,                 0, "Interrupt line (decimal): %i\n"},    {PCI_INTERRUPT_PIN,       ONEBYTE,                 0, "Interrupt pin (decimal): %i\n"},    {PCI_MIN_GNT,             ONEBYTE,                 0, "Min bus grant time (decimal): %i\n"},    {PCI_MAX_LAT,             ONEBYTE,                 0, "Max bus latency acceptable (decimal): %i\n"},    {0x00,                 0,                       0, NULL}};unsigned char buffer[PAGE_SIZE];int main(int argc, char **argv){    int fd=0, len;    char *fname="/proc/pcidata";        unsigned char *curr, *end;    if (argc!=2) {        fprintf(stderr,"%s: Usage: \"%s <filename>\"\n"                "\tfilename should embed binary pci configuration data\n"                "\tif filename is missing, stdin is used\n",                argv[0],argv[0]);        exit(1);    }    if (argc>1) {        fd=open(argv[1],O_RDONLY);        if (fd<0) {            fprintf(stderr,"%s: %s: %s\n",argv[0],argv[1],strerror(errno));            exit(1);        }    }    switch (len=read(fd,buffer,PAGE_SIZE)) {      case 0:        fprintf(stderr,"%s: /proc/pcidata: no data\n",argv[0]);        exit(1);      case -1:        fprintf(stderr,"%s: /proc/pcidata: %s\n",argv[0],strerror(errno));        exit(1);      default: break;    }    if (len < 256) {        buffer[len]='\0';        fprintf(stderr," %s: /dev/pcidata: %s\n",argv[0],buffer);        exit(1);    }    if (len % 256) {        fprintf(stderr," %s: /dev/pcidata: incorrect data size: %i\n",argv[0],len);        exit(1);    }    for (end=buffer+len, curr=buffer; curr<end; curr+=256) {        struct pcidump_info *ptr;        unsigned int datum;        for (ptr = dumpinfo; ptr->string; ptr++) {            /*             * Perform a little-endian read of the item             */            datum = curr[ptr->offset]                | (curr[ptr->offset+1]<<8)                    | (curr[ptr->offset+2]<<16)                        | (curr[ptr->offset+3]<<24);            datum &= ptr->bitmask;            printf(ptr->string, ptr->bool ? (datum ? 'y' : 'n') : datum);        }        printf("\n");    }    return 0;}#endif /* version 1.99.4 or newer */