1# 2# Copyright (c) 1998 Doug Rabson 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24# SUCH DAMAGE. 25# 26# $FreeBSD: src/sys/kern/bus_if.m,v 1.16 1999/10/12 21:35:50 dfr Exp $ 27# $DragonFly: src/sys/kern/bus_if.m,v 1.11 2006/10/25 20:56:02 dillon Exp $ 28# 29 30#include <sys/bus.h> 31 32INTERFACE bus; 33 34# 35# Default implementations of some methods. 36# 37CODE { 38 static struct resource * 39 null_alloc_resource(device_t dev, device_t child, 40 int type, int *rid, 41 u_long start, u_long end, 42 u_long count, u_int flags, int cpuid) 43 { 44 return 0; 45 } 46}; 47 48# 49# This is called from system code which prints out a description of a 50# device. It should describe the attachment that the child has with 51# the parent. See bus_generic_print_child.9 for more information. 52# This method returns the number of characters output. 53# 54METHOD int print_child { 55 device_t dev; 56 device_t child; 57} DEFAULT bus_generic_print_child; 58 59# 60# Called for each child device that 61# did not succeed in probing for a 62# driver. 63# 64METHOD void probe_nomatch { 65 device_t dev; 66 device_t child; 67}; 68 69# 70# These two methods manage a bus specific set of instance variables of 71# a child device. The intention is that each different type of bus 72# defines a set of appropriate instance variables (such as ports and 73# irqs for ISA bus etc.) 74# 75# This information could be given to the child device as a struct but 76# that makes it hard for a bus to add or remove variables without 77# forcing an edit and recompile for all drivers which may not be 78# possible for vendor supplied binary drivers. 79 80# 81# Read an instance variable. Return 0 on success. 82# 83METHOD int read_ivar { 84 device_t dev; 85 device_t child; 86 int index; 87 uintptr_t *result; 88}; 89 90# 91# Write an instance variable. Return 0 on success. 92# 93METHOD int write_ivar { 94 device_t dev; 95 device_t child; 96 int index; 97 uintptr_t value; 98}; 99 100# 101# Called after the child's DEVICE_DETACH method to allow the parent 102# to reclaim any resources allocated on behalf of the child. 103# 104METHOD void child_detached { 105 device_t dev; 106 device_t child; 107}; 108 109# 110# Called when a new driver is added to the devclass which owns this 111# bus. The generic implementation of this method attempts to probe and 112# attach any un-matched children of the bus. 113# 114METHOD void driver_added { 115 device_t dev; 116 driver_t *driver; 117} DEFAULT bus_generic_driver_added; 118 119# 120# For busses which use drivers supporting DEVICE_IDENTIFY to 121# enumerate their devices, these methods are used to create new 122# device instances. If place is non-NULL, the new device will be 123# added after the last existing child with the same order. 124# 125# bus is an entity which may iterate up through the bus heirarchy 126# while parent is the parent device under which the child should be 127# added. 128# 129METHOD device_t add_child { 130 device_t bus; 131 device_t parent; 132 int order; 133 const char *name; 134 int unit; 135}; 136 137# 138# Allocate a system resource attached to `dev' on behalf of `child'. 139# The types are defined in <sys/bus_resource.h>; the meaning of the 140# resource-ID field varies from bus to bus (but *rid == 0 is always 141# valid if the resource type is). start and end reflect the allowable 142# range, and should be passed as `0UL' and `~0UL', respectively, if 143# the client has no range restriction. count is the number of consecutive 144# indices in the resource required. flags is a set of sharing flags 145# as defined in <sys/rman.h>. 146# 147# Returns a resource or a null pointer on failure. The caller is 148# responsible for calling rman_activate_resource() when it actually 149# uses the resource. 150# 151METHOD struct resource * alloc_resource { 152 device_t dev; 153 device_t child; 154 int type; 155 int *rid; 156 u_long start; 157 u_long end; 158 u_long count; 159 u_int flags; 160 int cpuid; 161} DEFAULT null_alloc_resource; 162 163METHOD int activate_resource { 164 device_t dev; 165 device_t child; 166 int type; 167 int rid; 168 struct resource *r; 169}; 170 171METHOD int deactivate_resource { 172 device_t dev; 173 device_t child; 174 int type; 175 int rid; 176 struct resource *r; 177}; 178 179# 180# Free a resource allocated by the preceding method. The `rid' value 181# must be the same as the one returned by BUS_ALLOC_RESOURCE (which 182# is not necessarily the same as the one the client passed). 183# 184METHOD int release_resource { 185 device_t dev; 186 device_t child; 187 int type; 188 int rid; 189 struct resource *res; 190}; 191 192METHOD int setup_intr { 193 device_t dev; 194 device_t child; 195 struct resource *irq; 196 int flags; 197 driver_intr_t *intr; 198 void *arg; 199 void **cookiep; 200 lwkt_serialize_t serializer; 201 const char *desc; 202}; 203 204METHOD int teardown_intr { 205 device_t dev; 206 device_t child; 207 struct resource *irq; 208 void *cookie; 209}; 210 211# Enable or disable an interrupt. The device is generally expected to do 212# the physical enablement and disablement. The bus code must flag the 213# condition so it does not call the handler from a scheduled interrupt thread, 214# since the hard interrupt might be disabled after the interrupt thread 215# has been scheduled but before it runs. 216# 217# The disable function returns an indication as to whether the handler 218# is currently running (i.e. the disablement is racing the execution of 219# the interrupt handler). 0 is returned if it isn't, non-zero if it is. 220# 221# The disablement function does NOT interlock against a running handler, it 222# simply prevents future handler calls from being made. 223# 224METHOD void enable_intr { 225 device_t dev; 226 device_t child; 227 void *cookie; 228} DEFAULT bus_generic_enable_intr; 229 230METHOD int disable_intr { 231 device_t dev; 232 device_t child; 233 void *cookie; 234} DEFAULT bus_generic_disable_intr; 235 236# 237# Set the range used for a particular resource. Return EINVAL if 238# the type or rid are out of range. 239# 240METHOD int set_resource { 241 device_t dev; 242 device_t child; 243 int type; 244 int rid; 245 u_long start; 246 u_long count; 247 int cpuid; 248}; 249 250# 251# Get the range for a resource. Return ENOENT if the type or rid are 252# out of range or have not been set. 253# 254METHOD int get_resource { 255 device_t dev; 256 device_t child; 257 int type; 258 int rid; 259 u_long *startp; 260 u_long *countp; 261}; 262 263# 264# Delete a resource. 265# 266METHOD void delete_resource { 267 device_t dev; 268 device_t child; 269 int type; 270 int rid; 271}; 272 273# 274# Return a struct resource_list. 275# 276METHOD struct resource_list * get_resource_list { 277 device_t _dev; 278 device_t _child; 279} DEFAULT bus_generic_get_resource_list; 280 281# 282# Is the hardware described by _child still attached to the system? 283# 284# This method should return 0 if the device is not present. It should 285# return -1 if it is present. Any errors in determining should be 286# returned as a normal errno value. Client drivers are to assume that 287# the device is present, even if there is an error determining if it is 288# there. Busses are to try to avoid returning errors, but newcard will return 289# an error if the device fails to implement this method. 290# 291METHOD int child_present { 292 device_t _dev; 293 device_t _child; 294} DEFAULT bus_generic_child_present; 295 296# 297# Returns the pnp info for this device. Return it as a string. If the 298# string is insufficient for the storage, then return EOVERFLOW. 299# 300METHOD int child_pnpinfo_str { 301 device_t _dev; 302 device_t _child; 303 char *_buf; 304 size_t _buflen; 305}; 306 307# 308# Returns the location for this device. Return it as a string. If the 309# string is insufficient for the storage, then return EOVERFLOW. 310# 311METHOD int child_location_str { 312 device_t _dev; 313 device_t _child; 314 char *_buf; 315 size_t _buflen; 316}; 317 318# 319# Allow (bus) drivers to specify the trigger mode and polarity of the 320# specified interrupt. 321# 322METHOD int config_intr { 323 device_t _dev; 324 device_t _child; 325 int _irq; 326 enum intr_trigger _trig; 327 enum intr_polarity _pol; 328} DEFAULT bus_generic_config_intr; 329 330