pci_create_slot(9) [suse man page]

PCI_CREATE_SLOT(9)						Hardware Interfaces						PCI_CREATE_SLOT(9)

NAME

       pci_create_slot - create or increment refcount for physical PCI slot

SYNOPSIS

       struct pci_slot * pci_create_slot(struct pci_bus * parent, int slot_nr, const char * name, struct hotplug_slot * hotplug);

ARGUMENTS

       parent
	   struct pci_bus of parent bridge

       slot_nr
	   PCI_SLOT(pci_dev->devfn) or -1 for placeholder

       name
	   user visible string presented in /sys/bus/pci/slots/<name>

       hotplug
	   set if caller is hotplug driver, NULL otherwise

DESCRIPTION

       PCI slots have first class attributes such as address, speed, width, and a struct pci_slot is used to manage them. This interface will
       either return a new struct pci_slot to the caller, or if the pci_slot already exists, its refcount will be incremented.

       Slots are uniquely identified by a pci_bus, slot_nr tuple.

       There are known platforms with broken firmware that assign the same name to multiple slots. Workaround these broken platforms by renaming
       the slots on behalf of the caller. If firmware assigns name N to

MULTIPLE SLOTS

       The first slot is assigned N The second slot is assigned N-1 The third slot is assigned N-2 etc.

PLACEHOLDER SLOTS

       In most cases, pci_bus, slot_nr will be sufficient to uniquely identify a slot. There is one notable exception - pSeries (rpaphp), where
       the slot_nr cannot be determined until a device is actually inserted into the slot. In this scenario, the caller may pass -1 for slot_nr.

       The following semantics are imposed when the caller passes slot_nr == -1. First, we no longer check for an existing struct pci_slot, as
       there may be many slots with slot_nr of -1. The other change in semantics is user-visible, which is the 'address' parameter presented in
       sysfs will

CONSIST SOLELY OF A DDDD

       bb tuple, where dddd is the PCI domain of the struct pci_bus and bb is the bus number. In other words, the devfn of the 'placeholder' slot
       will not be displayed.

COPYRIGHT

Kernel Hackers Manual 2.6.					     July 2010							PCI_CREATE_SLOT(9)

strmod_add(2)							System Calls Manual						     strmod_add(2)

NAME

       strmod_add - Adds STREAMS modules and drivers

SYNOPSIS

       #include <sys/stream.h> dev_t strmod_add (      dev_t devno,	 struct streamtab *streamtab,	   struct streamadm *streamadm);

PARAMETERS

       The  device  number  (cdevsw slot) to use when adding a driver.	If NODEV is supplied, the first available slot is used.  This parameter is
       ignored for modules.  A pointer to the streamtab structure that contains the entry points.  The actual streamtab structure has to be  allo-
       cated  permanently  in  the driver's data space (as specified by System V Release 3.2).	A pointer to the streamadm structure that contains
       the administration parameters for the STREAMS module or driver.	The actual streamadm structure is needed only  for  the  duration  of  the
       call.  It does not have to be allocated permanently by the caller.

DESCRIPTION

       The  strmod_add()  interface  is used to configure STREAMS modules and drivers into the kernel.	Specifically, it allows STREAMS drivers to
       add entry points in character device switch tables.  Modules are added to the STREAMS modules switch.

       When adding a driver only, strmod_add() takes a device number, which is used to determine the device switch slot for the entry  points.	 A
       STREAMS	driver	can  supply NODEV instead of a device number.  In this case, strmod_add() finds the first available device switch slot and
       returns the number actually used.  If a device switch slot is already in use or if there are no slots available, NODEV is returned.

       The streamtab parameter is a pointer to a traditional (System V Release 3.2) streamtab structure.  The structure contains pointers to entry
       points for the module's read and write queue routines.

       The streamadm points to a streamadm structure.  The streamadm structure provides additional information that is required under Tru64 UNIX.

NOTES

       The device number can be constructed from the major number through the makedev macro, which is defined in /usr/include/sys/types.h.

RETURN VALUES

       Upon successful completion, strmod_add() returns the device number associated with the device switch table.  Otherwise, it returns NODEV.

RELATED INFORMATION

       Data Structures: streamadm(4)

       Routines: strmod_del(2) delim off

																     strmod_add(2)