bus_if.m revision 112588
136973Sdfr# 236973Sdfr# Copyright (c) 1998 Doug Rabson 336973Sdfr# All rights reserved. 436973Sdfr# 536973Sdfr# Redistribution and use in source and binary forms, with or without 636973Sdfr# modification, are permitted provided that the following conditions 736973Sdfr# are met: 836973Sdfr# 1. Redistributions of source code must retain the above copyright 936973Sdfr# notice, this list of conditions and the following disclaimer. 1036973Sdfr# 2. Redistributions in binary form must reproduce the above copyright 1136973Sdfr# notice, this list of conditions and the following disclaimer in the 1236973Sdfr# documentation and/or other materials provided with the distribution. 1336973Sdfr# 1436973Sdfr# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1536973Sdfr# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1636973Sdfr# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1736973Sdfr# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1836973Sdfr# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1936973Sdfr# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2036973Sdfr# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2136973Sdfr# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2236973Sdfr# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2336973Sdfr# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2436973Sdfr# SUCH DAMAGE. 2536973Sdfr# 2650477Speter# $FreeBSD: head/sys/kern/bus_if.m 112588 2003-03-25 04:32:52Z mdodd $ 2736973Sdfr# 2836973Sdfr 2959093Sdfr#include <sys/bus.h> 3059093Sdfr 3141017SnsouchINTERFACE bus; 3236973Sdfr 3336973Sdfr# 3446913Sdfr# Default implementations of some methods. 3546913Sdfr# 3646913SdfrCODE { 3746913Sdfr static struct resource * 3846913Sdfr null_alloc_resource(device_t dev, device_t child, 39100421Simp int type, int *rid, u_long start, u_long end, 40100421Simp u_long count, u_int flags) 4146913Sdfr { 42100421Simp return (0); 4346913Sdfr } 4446913Sdfr}; 4546913Sdfr 4646913Sdfr# 4736973Sdfr# This is called from system code which prints out a description of a 4836973Sdfr# device. It should describe the attachment that the child has with 4936973Sdfr# the parent. For instance the TurboLaser bus prints which node the 5049195Smdodd# device is attached to. See bus_generic_print_child.9 for more 5149195Smdodd# information. 5249195Smdodd# This method returns the number of characters output. 5336973Sdfr# 5449195SmdoddMETHOD int print_child { 5536973Sdfr device_t dev; 5636973Sdfr device_t child; 57112588Smdodd} DEFAULT bus_generic_print_child; 5836973Sdfr 5948754Sdfr# 6048754Sdfr# Called for each child device that 6148754Sdfr# did not succeed in probing for a 6248754Sdfr# driver. 6348754Sdfr# 6448754SdfrMETHOD void probe_nomatch { 6548754Sdfr device_t dev; 6648754Sdfr device_t child; 6748754Sdfr}; 6848754Sdfr 6936973Sdfr# 7036973Sdfr# These two methods manage a bus specific set of instance variables of 7136973Sdfr# a child device. The intention is that each different type of bus 7236973Sdfr# defines a set of appropriate instance variables (such as ports and 7336973Sdfr# irqs for ISA bus etc.) 7436973Sdfr# 7536973Sdfr# This information could be given to the child device as a struct but 7636973Sdfr# that makes it hard for a bus to add or remove variables without 7736973Sdfr# forcing an edit and recompile for all drivers which may not be 7836973Sdfr# possible for vendor supplied binary drivers. 7936973Sdfr 8036973Sdfr# 8136973Sdfr# Read an instance variable. Return 0 on success. 8236973Sdfr# 8336973SdfrMETHOD int read_ivar { 8495201Smarkm device_t _dev; 8595201Smarkm device_t _child; 8695201Smarkm int _indx; 8795201Smarkm uintptr_t *_result; 8836973Sdfr}; 8936973Sdfr 9036973Sdfr# 9136973Sdfr# Write an instance variable. Return 0 on success. 9236973Sdfr# 9336973SdfrMETHOD int write_ivar { 9495201Smarkm device_t _dev; 9595201Smarkm device_t _child; 9695201Smarkm int _indx; 9795201Smarkm uintptr_t _value; 9836973Sdfr}; 9936973Sdfr 10036973Sdfr# 10145107Sdfr# Called after the child's DEVICE_DETACH method to allow the parent 10245107Sdfr# to reclaim any resources allocated on behalf of the child. 10345107Sdfr# 10445107SdfrMETHOD void child_detached { 10595201Smarkm device_t _dev; 10695201Smarkm device_t _child; 10745107Sdfr}; 10845107Sdfr 10945107Sdfr# 11045720Speter# Called when a new driver is added to the devclass which owns this 11145720Speter# bus. The generic implementation of this method attempts to probe and 11245720Speter# attach any un-matched children of the bus. 11345720Speter# 11445720SpeterMETHOD void driver_added { 11595201Smarkm device_t _dev; 11695201Smarkm driver_t *_driver; 11752045Simp} DEFAULT bus_generic_driver_added; 11845720Speter 11945720Speter# 12047178Sdfr# For busses which use use drivers supporting DEVICE_IDENTIFY to 12147178Sdfr# enumerate their devices, these methods are used to create new 12247178Sdfr# device instances. If place is non-NULL, the new device will be 12347578Sdfr# added after the last existing child with the same order. 12447178Sdfr# 12547178SdfrMETHOD device_t add_child { 12695201Smarkm device_t _dev; 12795201Smarkm int _order; 12895201Smarkm const char *_name; 12995201Smarkm int _unit; 13047178Sdfr}; 13147178Sdfr 13247178Sdfr# 13341153Swollman# Allocate a system resource attached to `dev' on behalf of `child'. 13441153Swollman# The types are defined in <machine/resource.h>; the meaning of the 13541153Swollman# resource-ID field varies from bus to bus (but *rid == 0 is always 13641153Swollman# valid if the resource type is). start and end reflect the allowable 13741153Swollman# range, and should be passed as `0UL' and `~0UL', respectively, if 13841153Swollman# the client has no range restriction. count is the number of consecutive 13941153Swollman# indices in the resource required. flags is a set of sharing flags 14041153Swollman# as defined in <sys/rman.h>. 14136973Sdfr# 14241153Swollman# Returns a resource or a null pointer on failure. The caller is 14341153Swollman# responsible for calling rman_activate_resource() when it actually 14441153Swollman# uses the resource. 14541153Swollman# 14641153SwollmanMETHOD struct resource * alloc_resource { 14795201Smarkm device_t _dev; 14895201Smarkm device_t _child; 14995201Smarkm int _type; 15095201Smarkm int *_rid; 15195201Smarkm u_long _start; 15295201Smarkm u_long _end; 15395201Smarkm u_long _count; 15495201Smarkm u_int _flags; 15546913Sdfr} DEFAULT null_alloc_resource; 15637592Sdfr 15741153SwollmanMETHOD int activate_resource { 15895201Smarkm device_t _dev; 15995201Smarkm device_t _child; 16095201Smarkm int _type; 16195201Smarkm int _rid; 16295201Smarkm struct resource *_r; 16341153Swollman}; 16441153Swollman 16541153SwollmanMETHOD int deactivate_resource { 16695201Smarkm device_t _dev; 16795201Smarkm device_t _child; 16895201Smarkm int _type; 16995201Smarkm int _rid; 17095201Smarkm struct resource *_r; 17141153Swollman}; 17241153Swollman 17339344Sdfr# 17441153Swollman# Free a resource allocated by the preceding method. The `rid' value 17541153Swollman# must be the same as the one returned by BUS_ALLOC_RESOURCE (which 17641153Swollman# is not necessarily the same as the one the client passed). 17739344Sdfr# 17841153SwollmanMETHOD int release_resource { 17995201Smarkm device_t _dev; 18095201Smarkm device_t _child; 18195201Smarkm int _type; 18295201Smarkm int _rid; 18395201Smarkm struct resource *_res; 18437592Sdfr}; 18541153Swollman 18641153SwollmanMETHOD int setup_intr { 18795201Smarkm device_t _dev; 18895201Smarkm device_t _child; 18995201Smarkm struct resource *_irq; 19095201Smarkm int _flags; 19195201Smarkm driver_intr_t *_intr; 19295201Smarkm void *_arg; 19395201Smarkm void **_cookiep; 19441153Swollman}; 19541153Swollman 19641153SwollmanMETHOD int teardown_intr { 19795201Smarkm device_t _dev; 19895201Smarkm device_t _child; 19995201Smarkm struct resource *_irq; 20095201Smarkm void *_cookie; 20141153Swollman}; 20252174Sdfr 20352174Sdfr# 20452174Sdfr# Set the range used for a particular resource. Return EINVAL if 20552174Sdfr# the type or rid are out of range. 20652174Sdfr# 20752174SdfrMETHOD int set_resource { 20895201Smarkm device_t _dev; 20995201Smarkm device_t _child; 21095201Smarkm int _type; 21195201Smarkm int _rid; 21295201Smarkm u_long _start; 21395201Smarkm u_long _count; 21452174Sdfr}; 21552174Sdfr 21652174Sdfr# 21752174Sdfr# Get the range for a resource. Return ENOENT if the type or rid are 21852174Sdfr# out of range or have not been set. 21952174Sdfr# 22052174SdfrMETHOD int get_resource { 22195201Smarkm device_t _dev; 22295201Smarkm device_t _child; 22395201Smarkm int _type; 22495201Smarkm int _rid; 22595201Smarkm u_long *_startp; 22695201Smarkm u_long *_countp; 22752174Sdfr}; 22852174Sdfr 22952174Sdfr# 23052174Sdfr# Delete a resource. 23152174Sdfr# 23252174SdfrMETHOD void delete_resource { 23395201Smarkm device_t _dev; 23495201Smarkm device_t _child; 23595201Smarkm int _type; 23695201Smarkm int _rid; 23752174Sdfr}; 23867278Smdodd 23967278Smdodd# 24067278Smdodd# Return a struct resource_list. 24167278Smdodd# 24269294SmdoddMETHOD struct resource_list * get_resource_list { 24395201Smarkm device_t _dev; 24495201Smarkm device_t _child; 24567278Smdodd} DEFAULT bus_generic_get_resource_list; 246100421Simp 247100421Simp# 248100421Simp# Is the hardware described by _child still attached to the system? 249100421Simp# 250103209Simp# This method should return 0 if the device is not present. It should 251103209Simp# return -1 if it is present. Any errors in determining should be 252103209Simp# returned as a normal errno value. Client drivers are to assume that 253103209Simp# the device is present, even if there is an error determining if it is 254103209Simp# there. Busses are to try to avoid returning errors, but newcard will return 255103209Simp# an error if the device fails to implement this method. 256103209Simp# 257100421SimpMETHOD int child_present { 258100421Simp device_t _dev; 259100421Simp device_t _child; 260100421Simp} DEFAULT bus_generic_child_present; 261104597Simp 262104597Simp# 263104597Simp# Returns the pnp info for this device. Return it as a string. If the 264104597Simp# string is insufficient for the storage, then return EOVERFLOW. 265104597Simp# 266104597SimpMETHOD int child_pnpinfo_str { 267104597Simp device_t _dev; 268104597Simp device_t _child; 269104597Simp char *_buf; 270104597Simp size_t _buflen; 271104597Simp}; 272104597Simp 273104597Simp# 274104597Simp# Returns the location for this device. Return it as a string. If the 275104597Simp# string is insufficient for the storage, then return EOVERFLOW. 276104597Simp# 277104597SimpMETHOD int child_location_str { 278104597Simp device_t _dev; 279104597Simp device_t _child; 280104597Simp char *_buf; 281104597Simp size_t _buflen; 282104597Simp}; 283