int
pci_init(int initSocket_fd)
{
uint16_t testDevice;
int nr_sockets = 0;
int i=0;
int j=0;
int ret = 0;
int access_flags = 0;
ownaccess = &access;
ownopen = &open;
for (i=0; i<MAX_NUM_NODES; i++ )
{
socket_bus[i] = "N-A";
for(j=1;j<MAX_NUM_PCI_DEVICES;j++)
{
FD[i][j] = -2;
}
}
/* PCI is only provided by Intel systems */
if (!cpuid_info.isIntel)
{
DEBUG_PLAIN_PRINT(DEBUGLEV_DETAIL, PCI based Uncore performance monitoring only supported on Intel systems);
return -ENODEV;
}
switch (cpuid_info.model)
{
case SANDYBRIDGE_EP:
testDevice = 0x3c44;
break;
case IVYBRIDGE_EP:
testDevice = 0x0e36;
break;
case HASWELL_EP:
testDevice = 0x2f30;
break;
default:
DEBUG_PRINT(DEBUGLEV_INFO,CPU model %s does not support PCI based Uncore performance monitoring, cpuid_info.name);
return -ENODEV;
break;
}
#ifdef LIKWID_USE_HWLOC
DEBUG_PLAIN_PRINT(DEBUGLEV_DETAIL, Using hwloc to find pci devices);
ret = hwloc_pci_init(testDevice, socket_bus, &nr_sockets);
if (ret)
{
ERROR_PLAIN_PRINT(Using hwloc to find pci devices failed);
return -ENODEV;
}
#else
DEBUG_PLAIN_PRINT(DEBUGLEV_DETAIL, Using procfs to find pci devices);
ret = proc_pci_init(testDevice, socket_bus, &nr_sockets);
if (ret)
{
ERROR_PLAIN_PRINT(Using procfs to find pci devices failed);
return -ENODEV;
}
#endif
if (accessClient_mode == ACCESSMODE_DIRECT)
{
access_flags = R_OK|W_OK;
}
else
{
access_flags = F_OK;
}
for(i=0;i<nr_sockets;i++)
{
for(j=1;j<MAX_NUM_PCI_DEVICES;j++)
{
if (pci_devices[j].path != NULL)
{
bstring filepath = bformat("%s%s%s",PCI_ROOT_PATH,
socket_bus[i],
pci_devices[j].path);
if (!ownaccess(bdata(filepath),access_flags))
{
FD[i][j] = 0;
pci_devices[j].online = 1;
if (i==0)
{
DEBUG_PRINT(DEBUGLEV_DETAIL, PCI device %s (%d) online for socket %d at path %s, pci_devices[j].name,j, i,bdata(filepath));
}
}
else
{
int
access_x86_pci_init(const int socket)
{
int ret = 0;
if (access_x86_initialized == 0)
{
uint16_t testDevice;
ownaccess = &access;
ownopen = &open;
/* PCI is only provided by Intel systems */
if (!cpuid_info.isIntel)
{
DEBUG_PLAIN_PRINT(DEBUGLEV_DETAIL, PCI based Uncore performance monitoring only supported on Intel systems);
return -ENODEV;
}
switch (cpuid_info.model)
{
case SANDYBRIDGE_EP:
testDevice = 0x3c44;
break;
case IVYBRIDGE_EP:
testDevice = 0x0e36;
break;
case HASWELL_EP:
testDevice = 0x2f30;
break;
case BROADWELL_D:
testDevice = 0x6f30;
break;
default:
DEBUG_PRINT(DEBUGLEV_INFO,CPU model %s does not support PCI based Uncore performance monitoring, cpuid_info.name);
return -ENODEV;
break;
}
if(geteuid() != 0)
{
fprintf(stderr, "WARNING\n");
fprintf(stderr, "Direct access to the PCI Cfg Adressspace is only allowed for uid root!\n");
fprintf(stderr, "This means you can use performance groups as MEM only as root in direct mode.\n");
fprintf(stderr, "Alternatively you might want to look into (sys)daemonmode.\n\n");
return -EPERM;
}
for(int i=0; i<MAX_NUM_NODES; i++)
{
for(int j=1;j<MAX_NUM_PCI_DEVICES;j++)
{
FD[i][j] = -2;
}
}
#ifdef LIKWID_USE_HWLOC
DEBUG_PLAIN_PRINT(DEBUGLEV_DETAIL, Using hwloc to find pci devices);
ret = hwloc_pci_init(testDevice, socket_bus, &nr_sockets);
if (ret)
{
ERROR_PLAIN_PRINT(Using hwloc to find pci devices failed);
return -ENODEV;
}
#else
DEBUG_PLAIN_PRINT(DEBUGLEV_DETAIL, Using procfs to find pci devices);
ret = proc_pci_init(testDevice, socket_bus, &nr_sockets);
if (ret)
{
ERROR_PLAIN_PRINT(Using procfs to find pci devices failed);
return -ENODEV;
}
#endif
}
for(int j=1;j<MAX_NUM_PCI_DEVICES;j++)
{
if ((pci_devices[j].path != NULL) && (FD[socket][j] == -2))
{
bstring filepath = bformat("%s%s%s",PCI_ROOT_PATH,
socket_bus[socket],
pci_devices[j].path);
if (!ownaccess(bdata(filepath),X_OK))
{
FD[socket][j] = 0;
pci_devices[j].online = 1;
if (access_x86_initialized == 0)
{
DEBUG_PRINT(DEBUGLEV_DETAIL, PCI device %s (%d) online for socket %d at path %s, pci_devices[j].name,j, socket,bdata(filepath));
if (!ownaccess(bdata(filepath),R_OK|W_OK))
{
ERROR_PRINT(PCI device %s (%d) online for socket %d at path %s but not accessible, pci_devices[j].name,j, socket,bdata(filepath));
}
}