illumos: manual page: tuple.9s

TUPLE(9S) Data Structures for Drivers TUPLE(9S)

NAME

tuple - card information structure (CIS) access structure

SYNOPSIS

#include <sys/pccard.h>

INTERFACE LEVEL

illumos DDI Specific (illumos DDI)

DESCRIPTION

The tuple_t structure is the basic data structure provided by card
services to manage PC card information. A PC card provides identification
and configuration information through its card information structure
(CIS). A PC card driver accesses a PC card's CIS through various card
services functions.

The CIS information allows PC cards to be self-identifying: the CIS
provides information to the system so that it can identify the proper PC
card driver for the PC card, and provides configuration information so
that the driver can allocate appropriate resources to configure the PC
card for proper operation in the system.

The CIS information is contained on the PC card in a linked list of tuple
data structures called a CIS chain. Each tuple has a one-byte type and a
one-byte link, an offset to the next tuple in the list. A PC card can
have one or more CIS chains.

A multi-function PC card that complies with the PC Card 95 MultiFunction
Metaformat specification will have one or more global CIS chains that
collectively are referred to as the global CIS. These PC Cards will also
have one or more per-function CIS chains. Each per-function collection of
CIS chains is referred to as a function-specific CIS.

To examine a PC card's CIS, first a PC card driver must locate the
desired tuple by calling csx_GetFirstTuple(9F). Once the first tuple is
located, subsequent tuples may be located by calling
csx_GetNextTuple(9F). See csx_GetFirstTuple(9F). The linked list of
tuples may be inspected one by one, or the driver may narrow the search
by requesting only tuples of a particular type.

Once a tuple has been located, the PC card driver may inspect the tuple
data. The most convenient way to do this for standard tuples is by
calling one of the number of tuple-parsing utility functions; for custom
tuples, the driver may get access to the raw tuple data by calling
csx_GetTupleData(9F).

illumos PC card drivers do not need to be concerned with which CIS chain
a tuple appears in. On a multi-function PC card, the client will get the
tuples from the global CIS followed by the tuples in the function-
specific CIS. The caller will not get any tuples from a function-specific
CIS that does not belong to the caller's function.

STRUCTURE MEMBERS

The structure members of tuple_t are:

uint32_t Socket; /* socket number */
uint32_t Attributes; /* tuple attributes */
cisdata_t DesiredTuple; /* tuple to search for */
cisdata_t TupleOffset; /* tuple data offset */
cisdata_t TupleDataMax; /* max tuple data size */
cisdata_t TupleDataLen; /* actual tuple data length */
cisdata_t TupleData[CIS_MAX_TUPLE_DATA_LEN];
/* body tuple data */
cisdata_t TupleCode; /* tuple type code */
cisdata_t TupleLink; /* tuple link */

The fields are defined as follows:

Socket
Not used in illumos, but for portability with other card
services implementations, it should be set to the
logical socket number.

Attributes
This field is bit-mapped. The following bits are
defined:

TUPLE_RETURN_LINK

Return link tuples if set.

TUPLE_RETURN_IGNORED_TUPLES

Return ignored tuples if set. Ignored tuples are
those tuples in a multi-function PC card's global
CIS chain that are duplicates of the same tuples in
a function-specific CIS chain.

TUPLE_RETURN_NAME

Return tuple name string using the
csx_ParseTuple(9F) function if set.

DesiredTuple
This field is the requested tuple type code to be
returned when calling csx_GetFirstTuple(9F) or
csx_GetNextTuple(9F). RETURN_FIRST_TUPLE is used to
return the first tuple regardless of tuple type.
RETURN_NEXT_TUPLE is used to return the next tuple
regardless of tuple type.

TupleOffset
This field allows partial tuple information to be
retrieved, starting at the specified offset within the
tuple. This field must only be set before calling
csx_GetTupleData(9F).

TupleDataMax
This field is the size of the tuple data buffer that
card services uses to return raw tuple data from
csx_GetTupleData(9F). It can be larger than the number
of bytes in the tuple data body. Card services ignores
any value placed here by the client.

TupleDataLen
This field is the actual size of the tuple data body. It
represents the number of tuple data body bytes returned
by csx_GetTupleData(9F).

TupleData
This field is an array of bytes containing the raw tuple
data body contents returned by csx_GetTupleData(9F).

TupleCode
This field is the tuple type code and is returned by
csx_GetFirstTuple(9F) or csx_GetNextTuple(9F) when a
tuple matching the DesiredTuple field is returned.

TupleLink
This field is the tuple link, the offset to the next
tuple, and is returned by csx_GetFirstTuple(9F) or
csx_GetNextTuple(9F) when a tuple matching the
DesiredTuple field is returned.

NAME

SYNOPSIS

INTERFACE LEVEL

DESCRIPTION

STRUCTURE MEMBERS

SEE ALSO