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util: two new pci util functions

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pciDeviceGetVirtualFunctionInfo returns pf netdevice name and virtual
function index for a given vf. This is just a wrapper around existing functions
to return vf's pf and vf_index with one api call

pciConfigAddressToSysfsfile returns the sysfile pci device link
from a 'struct pci_config_address'

Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
This commit is contained in:
Roopa Prabhu 2012-03-05 17:12:23 -08:00 committed by Laine Stump
parent cf90342be0
commit b8b702734c
3 changed files with 64 additions and 0 deletions
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2
src/libvirt_private.syms
View File

@ -864,6 +864,7 @@ virNWFilterVarValueGetSimple;
# pci.h
pciConfigAddressToSysfsFile;
pciDettachDevice;
pciDeviceFileIterate;
pciDeviceGetManaged;
@ -872,6 +873,7 @@ pciDeviceGetRemoveSlot;
pciDeviceGetReprobe;
pciDeviceGetUnbindFromStub;
pciDeviceGetUsedBy;
pciDeviceGetVirtualFunctionInfo;
pciDeviceIsAssignable;
pciDeviceIsVirtualFunction;
pciDeviceListAdd;

55
src/util/pci.c
View File

@ -2081,6 +2081,20 @@ pciSysfsFile(char *pciDeviceName, char **pci_sysfs_device_link)
return 0;
}
int
pciConfigAddressToSysfsFile(struct pci_config_address *dev,
char **pci_sysfs_device_link)
{
if (virAsprintf(pci_sysfs_device_link,
PCI_SYSFS "devices/%04x:%02x:%02x.%x", dev->domain,
dev->bus, dev->slot, dev->function) < 0) {
virReportOOMError();
return -1;
}
return 0;
}
/*
* Returns the network device name of a pci device
*/
@ -2123,6 +2137,38 @@ out:
return ret;
}
int
pciDeviceGetVirtualFunctionInfo(const char *vf_sysfs_device_path,
char **pfname, int *vf_index)
{
struct pci_config_address *pf_config_address = NULL;
char *pf_sysfs_device_path = NULL;
int ret = -1;
if (pciGetPhysicalFunction(vf_sysfs_device_path, &pf_config_address) < 0)
return ret;
if (pciConfigAddressToSysfsFile(pf_config_address,
&pf_sysfs_device_path) < 0) {
VIR_FREE(pf_config_address);
return ret;
}
if (pciGetVirtualFunctionIndex(pf_sysfs_device_path, vf_sysfs_device_path,
vf_index) < 0)
goto cleanup;
ret = pciDeviceNetName(pf_sysfs_device_path, pfname);
cleanup:
VIR_FREE(pf_config_address);
VIR_FREE(pf_sysfs_device_path);
return ret;
}
#else
int
pciGetPhysicalFunction(const char *vf_sysfs_path ATTRIBUTE_UNUSED,
@ -2170,4 +2216,13 @@ pciDeviceNetName(char *device_link_sysfs_path ATTRIBUTE_UNUSED,
"supported on non-linux platforms"));
return -1;
}
int
pciDeviceGetVirtualFunctionInfo(const char *vf_sysfs_device_path ATTRIBUTE_UNUSED,
char **pfname, int *vf_index ATTRIBUTE_UNUSED)
{
pciReportError(VIR_ERR_INTERNAL_ERROR, _("pciDeviceGetVirtualFunctionInfo "
"is not supported on non-linux platforms"));
return -1;
}
#endif /* __linux__ */

7
src/util/pci.h
View File

@ -111,6 +111,9 @@ int pciGetVirtualFunctionIndex(const char *pf_sysfs_device_link,
const char *vf_sysfs_device_link,
int *vf_index);
int pciConfigAddressToSysfsFile(struct pci_config_address *dev,
char **pci_sysfs_device_link);
int pciDeviceNetName(char *device_link_sysfs_path, char **netname);
int pciSysfsFile(char *pciDeviceName, char **pci_sysfs_device_link)
@ -122,4 +125,8 @@ int pciGetDeviceAddrString(unsigned domain,
unsigned function,
char **pciConfigAddr)
ATTRIBUTE_NONNULL(5) ATTRIBUTE_RETURN_CHECK;
int pciDeviceGetVirtualFunctionInfo(const char *vf_sysfs_device_path,
char **pfname, int *vf_index);
#endif /* __VIR_PCI_H__ */