MODULE_PNP_INFO(9)     FreeBSD Kernel Developer's Manual    MODULE_PNP_INFO(9)

NAME
     MODULE_PNP_INFO - register plug and play information for device matching

SYNOPSIS
     #include <sys/module.h>

     MODULE_PNP_INFO(const char *descriptor_string, bus, module, void *table,
         size_t num_entries);

DESCRIPTION
     The MODULE_PNP_INFO() macro registers a table of device-identifying data
     for use by devmatch(8).  Since it is built off module marking macros, it
     must follow a DRIVER_MODULE(9) line.

     The macro takes a descriptor_string that describes the memory layout of
     table entries.  The string is a series of members separated by semi-
     colons.  Members are identified by a type and a name.  They are encoded
     in the descriptor string by concatenating the type with a colon, followed
     by the name.  (The special type W32 represents two members.  The first
     name is encoded like any other type.  The second name is encoded by
     appending a forward slash and the second name after the first.)

     Types are one of the following:

     "U8"
          uint8_t element.

     "V8"
          Same as U8, except that the sentinel value 0xFF matches any.

     "G16"
          uint16_t element; any value greater than or equal matches.

     "L16"
          uint16_t element; any value less than or equal matches.

     "M16"
          uint16_t element; mask of which of the following fields to use.

     "U16"
          uint16_t element.

     "V16"
          Same as U16, except that the sentinel value 0xFFFF matches any.

     "U32"
          uint32_t element.

     "V32"
          Same as U32, except that the sentinel value 0xFFFFFFFF matches any.

     "W32"
          Two uint16_t values; the first named member is in the least
          significant word and the second named member is in the most
          significant word.

     "Z"  A pointer to a string to match exactly.

     "D"  A pointer to a human readable description for the device.

     "P"  A pointer that should be ignored.

     "E"  EISA PNP Identifier.

     "T"  PNP info that is true for the whole table.  The driver code checks
          for these condition pragmatically before using this table to match
          devices.  This item must come last in the list.

     The pseudo-name "#" is reserved for fields that should be ignored.  Any
     member that does not match the parent device's pnpinfo output must be
     ignored.

     The bus parameter is an unquoted word naming the parent bus of the
     driver.  For example, "pci".

     The module parameter is also an unquoted word.  It must be unique to the
     driver.  Usually the driver's name is used.

     The table parameter points to the device matching data with entries
     matching the descriptor_string.

     The num_entries parameter is the number of entries in the table, i.e.,
     `nitems(table)'.  Note that only valid entries should be included.  If
     the table contains trailing zero or bogus values, they should not be
     included in num_entries.

EXAMPLES
     Example 1: Using W32 for vendor/device pair

       The following example shows usage of W32 type when vendor/device values
       are combined into single uint32_t value:

       #include <sys/param.h>
       #include <sys/module.h>

       static struct my_pciids {
               uint32_t devid;
               const char *desc;
       } my_ids[] = {
               { 0x12345678, "Foo bar" },
               { 0x9abcdef0, "Baz fizz" },
       };

       MODULE_PNP_INFO("W32:vendor/device;D:#", pci, my_driver, my_ids,
           nitems(my_ids));

     Example 2: Using T for common vendor value

       The following example shows usage of T type when all entries in the
       table have the same vendor value:

       #include <sys/param.h>
       #include <sys/module.h>

       static struct my_pciids {
               uint16_t device;
               const char *desc;
       } my_ids[] = {
               { 0x9abc, "Foo bar" },
               { 0xdef0, "Baz fizz" },
       };

       MODULE_PNP_INFO("U16:device;D:#;T:vendor=0x1234", pci, my_driver,
           my_ids, nitems(my_ids));

BUGS
     The MODULE_PNP_INFO macro must follow DRIVER_MODULE invocations due to
     limitations in the linker.hints file format.

SEE ALSO
     devmatch(8), DRIVER_MODULE(9), module(9)

HISTORY
     The macro MODULE_PNP_INFO appeared in FreeBSD 11.0.

AUTHORS
     The PNP framework and devmatch(8) utility were written by Warner Losh
     <imp@FreeBSD.org>.

FreeBSD 13.1-RELEASE-p6          May 23, 2019          FreeBSD 13.1-RELEASE-p6