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pci_get_subsys(9) [centos man page]

PCI_GET_SUBSYS(9)						Hardware Interfaces						 PCI_GET_SUBSYS(9)

NAME
pci_get_subsys - begin or continue searching for a PCI device by vendor/subvendor/device/subdevice id SYNOPSIS
struct pci_dev * pci_get_subsys(unsigned int vendor, unsigned int device, unsigned int ss_vendor, unsigned int ss_device, struct pci_dev * from); ARGUMENTS
vendor PCI vendor id to match, or PCI_ANY_ID to match all vendor ids device PCI device id to match, or PCI_ANY_ID to match all device ids ss_vendor PCI subsystem vendor id to match, or PCI_ANY_ID to match all vendor ids ss_device PCI subsystem device id to match, or PCI_ANY_ID to match all device ids from Previous PCI device found in search, or NULL for new search. DESCRIPTION
Iterates through the list of known PCI devices. If a PCI device is found with a matching vendor, device, ss_vendor and ss_device, a pointer to its device structure is returned, and the reference count to the device is incremented. Otherwise, NULL is returned. A new search is initiated by passing NULL as the from argument. Otherwise if from is not NULL, searches continue from next device on the global list. The reference count for from is always decremented if it is not NULL. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 PCI_GET_SUBSYS(9)

Check Out this Related Man Page

PCI(3)							   BSD Library Functions Manual 						    PCI(3)

NAME
pci -- library interface for PCI bus access LIBRARY
PCI Bus Access Library (libpci, -lpci) SYNOPSIS
#include <pci.h> int pcibus_conf_read(int pcifd, u_int bus, u_int dev, u_int func, u_int reg, pcireg_t *valp); int pcibus_conf_write(int pcifd, u_int bus, u_int dev, u_int func, u_int reg, pcireg_t val); int pcidev_conf_read(int devfd, u_int reg, pcireg_t *valp); int pcidev_conf_write(int devfd, u_int reg, pcireg_t val); char * pci_findvendor(pcireg_t id_reg); void pci_devinfo(pcireg_t id_reg, pcireg_t class_reg, char *devinfo, size_t len); void pci_conf_print(int pcifd, u_int bus, u_int dev, u_int func); DESCRIPTION
The pci library provides support for accessing the PCI bus by user programs. These functions are available in the libpci library. Programs should be linked with -lpci. CONFIGURATION SPACE FUNCTIONS
The following functions are used to access PCI configuration space: pcibus_conf_read() Access the PCI configuration register reg on the device located at bus, dev, func, and place the result in *valp. pcifd must be an open file descriptor to a PCI bus within the target PCI domain. pcibus_conf_write() Write the value specified by val into the PCI configuration register reg on the device located at bus, dev, func. pcifd must be an open file descriptor to a PCI bus within the target PCI domain. pcidev_conf_read() Access the PCI configuration register reg on the device associated with the open file descriptor devfd and place the result in *valp. pcidev_conf_write() Write the value specified by val into the PCI configuration register reg on the device associated with the open file descriptor devfd. MISCELLANEOUS FUNCTIONS
The following miscellaneous functions are available: pci_findvendor() Return an ASCII description of the PCI vendor in the PCI ID register id_reg. pci_devinfo() Return an ASCII description of the PCI vendor, PCI product, and PCI class specified by the PCI ID register id_reg and PCI class ID reg- ister class_reg. The description is placed into the buffer pointed to by devinfo; the size of that buffer is specified in len. pci_conf_print() Print the PCI configuration information for the device located at bus, dev, func. pcifd must be an open file descriptor to a PCI bus within the target PCI domain. RETURN VALUES
The pcibus_conf_read(), pcibus_conf_write(), pcidev_conf_read(), and pcidev_conf_write() functions return 0 on success and -1 on failure. The pci_findvendor() function returns NULL if the PCI vendor description cannot be found. SEE ALSO
pci(4) HISTORY
The pcibus_conf_read(), pcibus_conf_write(), pcidev_conf_read(), pcidev_conf_write(), pci_findvendor(), pci_devinfo(), and pci_conf_print() functions first appeared in NetBSD 1.6. BSD
April 24, 2004 BSD

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