7c00e355a2
and/or INTR_FAST. This belongs elsehwere and perhaps under bootverbose; I'm committing it for now as it's uesful to know which drivers have been converted and which have not.
2657 lines
57 KiB
C
2657 lines
57 KiB
C
/*-
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* Copyright (c) 1997,1998 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_bus.h"
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/filio.h>
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#include <sys/lock.h>
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#include <sys/kernel.h>
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#include <sys/kobj.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/poll.h>
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#include <sys/proc.h>
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#include <sys/condvar.h>
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#include <sys/queue.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <sys/selinfo.h>
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#include <sys/signalvar.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/uio.h>
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#include <sys/bus.h>
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#include <machine/stdarg.h>
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#include <vm/uma.h>
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SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL);
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/*
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* Used to attach drivers to devclasses.
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*/
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typedef struct driverlink *driverlink_t;
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struct driverlink {
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driver_t *driver;
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TAILQ_ENTRY(driverlink) link; /* list of drivers in devclass */
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};
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/*
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* Forward declarations
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*/
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typedef TAILQ_HEAD(devclass_list, devclass) devclass_list_t;
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typedef TAILQ_HEAD(driver_list, driverlink) driver_list_t;
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typedef TAILQ_HEAD(device_list, device) device_list_t;
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struct devclass {
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TAILQ_ENTRY(devclass) link;
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driver_list_t drivers; /* bus devclasses store drivers for bus */
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char *name;
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device_t *devices; /* array of devices indexed by unit */
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int maxunit; /* size of devices array */
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};
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/*
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* Implementation of device.
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*/
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struct device {
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/*
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* A device is a kernel object. The first field must be the
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* current ops table for the object.
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*/
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KOBJ_FIELDS;
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/*
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* Device hierarchy.
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*/
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TAILQ_ENTRY(device) link; /* list of devices in parent */
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TAILQ_ENTRY(device) devlink; /* global device list membership */
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device_t parent;
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device_list_t children; /* list of subordinate devices */
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/*
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* Details of this device.
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*/
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driver_t *driver;
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devclass_t devclass; /* device class which we are in */
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int unit;
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char* nameunit; /* name+unit e.g. foodev0 */
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char* desc; /* driver specific description */
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int busy; /* count of calls to device_busy() */
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device_state_t state;
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u_int32_t devflags; /* api level flags for device_get_flags() */
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u_short flags;
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#define DF_ENABLED 1 /* device should be probed/attached */
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#define DF_FIXEDCLASS 2 /* devclass specified at create time */
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#define DF_WILDCARD 4 /* unit was originally wildcard */
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#define DF_DESCMALLOCED 8 /* description was malloced */
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#define DF_QUIET 16 /* don't print verbose attach message */
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#define DF_DONENOMATCH 32 /* don't execute DEVICE_NOMATCH again */
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#define DF_EXTERNALSOFTC 64 /* softc not allocated by us */
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u_char order; /* order from device_add_child_ordered() */
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u_char pad;
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void *ivars;
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void *softc;
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};
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struct device_op_desc {
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unsigned int offset; /* offset in driver ops */
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struct method* method; /* internal method implementation */
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devop_t deflt; /* default implementation */
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const char* name; /* unique name (for registration) */
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};
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static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");
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#ifdef BUS_DEBUG
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static int bus_debug = 1;
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TUNABLE_INT("bus.debug", &bus_debug);
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SYSCTL_INT(_debug, OID_AUTO, bus_debug, CTLFLAG_RW, &bus_debug, 0,
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"Debug bus code");
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#define PDEBUG(a) if (bus_debug) {printf("%s:%d: ", __func__, __LINE__), printf a; printf("\n");}
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#define DEVICENAME(d) ((d)? device_get_name(d): "no device")
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#define DRIVERNAME(d) ((d)? d->name : "no driver")
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#define DEVCLANAME(d) ((d)? d->name : "no devclass")
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/* Produce the indenting, indent*2 spaces plus a '.' ahead of that to
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* prevent syslog from deleting initial spaces
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*/
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#define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while (0)
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static void print_device_short(device_t dev, int indent);
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static void print_device(device_t dev, int indent);
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void print_device_tree_short(device_t dev, int indent);
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void print_device_tree(device_t dev, int indent);
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static void print_driver_short(driver_t *driver, int indent);
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static void print_driver(driver_t *driver, int indent);
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static void print_driver_list(driver_list_t drivers, int indent);
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static void print_devclass_short(devclass_t dc, int indent);
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static void print_devclass(devclass_t dc, int indent);
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void print_devclass_list_short(void);
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void print_devclass_list(void);
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#else
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/* Make the compiler ignore the function calls */
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#define PDEBUG(a) /* nop */
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#define DEVICENAME(d) /* nop */
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#define DRIVERNAME(d) /* nop */
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#define DEVCLANAME(d) /* nop */
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#define print_device_short(d,i) /* nop */
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#define print_device(d,i) /* nop */
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#define print_device_tree_short(d,i) /* nop */
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#define print_device_tree(d,i) /* nop */
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#define print_driver_short(d,i) /* nop */
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#define print_driver(d,i) /* nop */
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#define print_driver_list(d,i) /* nop */
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#define print_devclass_short(d,i) /* nop */
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#define print_devclass(d,i) /* nop */
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#define print_devclass_list_short() /* nop */
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#define print_devclass_list() /* nop */
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#endif
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/*
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* /dev/devctl implementation
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*/
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/*
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* This design allows only one reader for /dev/devctl. This is not desirable
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* in the long run, but will get a lot of hair out of this implementation.
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* Maybe we should make this device a clonable device.
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*
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* Also note: we specifically do not attach a device to the device_t tree
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* to avoid potential chicken and egg problems. One could argue that all
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* of this belongs to the root node. One could also further argue that the
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* sysctl interface that we have not might more properly be an ioctl
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* interface, but at this stage of the game, I'm not inclined to rock that
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* boat.
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*
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* I'm also not sure that the SIGIO support is done correctly or not, as
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* I copied it from a driver that had SIGIO support that likely hasn't been
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* tested since 3.4 or 2.2.8!
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*/
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static int sysctl_devctl_disable(SYSCTL_HANDLER_ARGS);
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static int devctl_disable = 0;
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TUNABLE_INT("hw.bus.devctl_disable", &devctl_disable);
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SYSCTL_PROC(_hw_bus, OID_AUTO, devctl_disable,
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CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_devctl_disable,
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"I", "devctl disable");
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static d_open_t devopen;
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static d_close_t devclose;
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static d_read_t devread;
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static d_ioctl_t devioctl;
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static d_poll_t devpoll;
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#define CDEV_MAJOR 173
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static struct cdevsw dev_cdevsw = {
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.d_open = devopen,
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.d_close = devclose,
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.d_read = devread,
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.d_ioctl = devioctl,
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.d_poll = devpoll,
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.d_name = "devctl",
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.d_maj = CDEV_MAJOR,
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};
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struct dev_event_info
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{
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char *dei_data;
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TAILQ_ENTRY(dev_event_info) dei_link;
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};
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TAILQ_HEAD(devq, dev_event_info);
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static struct dev_softc
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{
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int inuse;
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int nonblock;
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struct mtx mtx;
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struct cv cv;
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struct selinfo sel;
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struct devq devq;
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struct proc *async_proc;
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} devsoftc;
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static dev_t devctl_dev;
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static void
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devinit(void)
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{
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devctl_dev = make_dev(&dev_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
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"devctl");
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mtx_init(&devsoftc.mtx, "dev mtx", "devd", MTX_DEF);
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cv_init(&devsoftc.cv, "dev cv");
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TAILQ_INIT(&devsoftc.devq);
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}
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static int
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devopen(dev_t dev, int oflags, int devtype, d_thread_t *td)
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{
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if (devsoftc.inuse)
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return (EBUSY);
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/* move to init */
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devsoftc.inuse = 1;
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devsoftc.nonblock = 0;
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devsoftc.async_proc = NULL;
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return (0);
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}
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static int
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devclose(dev_t dev, int fflag, int devtype, d_thread_t *td)
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{
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devsoftc.inuse = 0;
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mtx_lock(&devsoftc.mtx);
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cv_broadcast(&devsoftc.cv);
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mtx_unlock(&devsoftc.mtx);
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return (0);
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}
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/*
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* The read channel for this device is used to report changes to
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* userland in realtime. We are required to free the data as well as
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* the n1 object because we allocate them separately. Also note that
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* we return one record at a time. If you try to read this device a
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* character at a time, you will loose the rest of the data. Listening
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* programs are expected to cope.
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*/
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static int
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devread(dev_t dev, struct uio *uio, int ioflag)
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{
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struct dev_event_info *n1;
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int rv;
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mtx_lock(&devsoftc.mtx);
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while (TAILQ_EMPTY(&devsoftc.devq)) {
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if (devsoftc.nonblock) {
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mtx_unlock(&devsoftc.mtx);
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return (EAGAIN);
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}
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rv = cv_wait_sig(&devsoftc.cv, &devsoftc.mtx);
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if (rv) {
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/*
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* Need to translate ERESTART to EINTR here? -- jake
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*/
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mtx_unlock(&devsoftc.mtx);
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return (rv);
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}
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}
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n1 = TAILQ_FIRST(&devsoftc.devq);
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TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
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mtx_unlock(&devsoftc.mtx);
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rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio);
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free(n1->dei_data, M_BUS);
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free(n1, M_BUS);
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return (rv);
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}
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static int
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devioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, d_thread_t *td)
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{
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switch (cmd) {
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case FIONBIO:
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if (*(int*)data)
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devsoftc.nonblock = 1;
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else
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devsoftc.nonblock = 0;
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return (0);
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case FIOASYNC:
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if (*(int*)data)
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devsoftc.async_proc = td->td_proc;
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else
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devsoftc.async_proc = NULL;
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return (0);
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/* (un)Support for other fcntl() calls. */
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case FIOCLEX:
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case FIONCLEX:
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case FIONREAD:
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case FIOSETOWN:
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case FIOGETOWN:
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default:
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break;
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}
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return (ENOTTY);
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}
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static int
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devpoll(dev_t dev, int events, d_thread_t *td)
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{
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int revents = 0;
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mtx_lock(&devsoftc.mtx);
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if (events & (POLLIN | POLLRDNORM)) {
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if (!TAILQ_EMPTY(&devsoftc.devq))
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revents = events & (POLLIN | POLLRDNORM);
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else
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selrecord(td, &devsoftc.sel);
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}
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mtx_unlock(&devsoftc.mtx);
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return (revents);
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}
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/*
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* Common routine that tries to make sending messages as easy as possible.
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* We allocate memory for the data, copy strings into that, but do not
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* free it unless there's an error. The dequeue part of the driver should
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* free the data. We don't send data when the device is disabled. We do
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* send data, even when we have no listeners, because we wish to avoid
|
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* races relating to startup and restart of listening applications.
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*/
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static void
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devaddq(const char *type, const char *what, device_t dev)
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{
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struct dev_event_info *n1 = NULL;
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struct proc *p;
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char *data = NULL;
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char *loc;
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const char *parstr;
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|
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if (devctl_disable)
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return;
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n1 = malloc(sizeof(*n1), M_BUS, M_NOWAIT);
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if (n1 == NULL)
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goto bad;
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data = malloc(1024, M_BUS, M_NOWAIT);
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if (data == NULL)
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goto bad;
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loc = malloc(1024, M_BUS, M_NOWAIT);
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if (loc == NULL)
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goto bad;
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*loc = '\0';
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bus_child_location_str(dev, loc, 1024);
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if (device_get_parent(dev) == NULL)
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parstr = "."; /* Or '/' ? */
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else
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parstr = device_get_nameunit(device_get_parent(dev));
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snprintf(data, 1024, "%s%s at %s on %s\n", type, what, loc, parstr);
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free(loc, M_BUS);
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n1->dei_data = data;
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|
mtx_lock(&devsoftc.mtx);
|
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TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link);
|
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cv_broadcast(&devsoftc.cv);
|
|
mtx_unlock(&devsoftc.mtx);
|
|
selwakeup(&devsoftc.sel);
|
|
p = devsoftc.async_proc;
|
|
if (p != NULL) {
|
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PROC_LOCK(p);
|
|
psignal(p, SIGIO);
|
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PROC_UNLOCK(p);
|
|
}
|
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return;
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bad:;
|
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free(data, M_BUS);
|
|
free(n1, M_BUS);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* A device was added to the tree. We are called just after it successfully
|
|
* attaches (that is, probe and attach success for this device). No call
|
|
* is made if a device is merely parented into the tree. See devnomatch
|
|
* if probe fails. If attach fails, no notification is sent (but maybe
|
|
* we should have a different message for this).
|
|
*/
|
|
static void
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devadded(device_t dev)
|
|
{
|
|
devaddq("+", device_get_nameunit(dev), dev);
|
|
}
|
|
|
|
/*
|
|
* A device was removed from the tree. We are called just before this
|
|
* happens.
|
|
*/
|
|
static void
|
|
devremoved(device_t dev)
|
|
{
|
|
devaddq("-", device_get_nameunit(dev), dev);
|
|
}
|
|
|
|
/*
|
|
* Called when there's no match for this device. This is only called
|
|
* the first time that no match happens, so we don't keep getitng this
|
|
* message. Should that prove to be undesirable, we can change it.
|
|
* This is called when all drivers that can attach to a given bus
|
|
* decline to accept this device. Other errrors may not be detected.
|
|
*/
|
|
static void
|
|
devnomatch(device_t dev)
|
|
{
|
|
char *pnp = NULL;
|
|
|
|
pnp = malloc(1024, M_BUS, M_NOWAIT);
|
|
if (pnp == NULL)
|
|
return;
|
|
*pnp = '\0';
|
|
bus_child_pnpinfo_str(dev, pnp, 1024);
|
|
devaddq("?", pnp, dev);
|
|
free(pnp, M_BUS);
|
|
return;
|
|
}
|
|
|
|
static int
|
|
sysctl_devctl_disable(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct dev_event_info *n1;
|
|
int dis, error;
|
|
|
|
dis = devctl_disable;
|
|
error = sysctl_handle_int(oidp, &dis, 0, req);
|
|
if (error || !req->newptr)
|
|
return (error);
|
|
mtx_lock(&devsoftc.mtx);
|
|
devctl_disable = dis;
|
|
if (dis) {
|
|
while (!TAILQ_EMPTY(&devsoftc.devq)) {
|
|
n1 = TAILQ_FIRST(&devsoftc.devq);
|
|
TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
|
|
free(n1->dei_data, M_BUS);
|
|
free(n1, M_BUS);
|
|
}
|
|
}
|
|
mtx_unlock(&devsoftc.mtx);
|
|
return (0);
|
|
}
|
|
|
|
/* End of /dev/devctl code */
|
|
|
|
TAILQ_HEAD(,device) bus_data_devices;
|
|
static int bus_data_generation = 1;
|
|
|
|
kobj_method_t null_methods[] = {
|
|
{ 0, 0 }
|
|
};
|
|
|
|
DEFINE_CLASS(null, null_methods, 0);
|
|
|
|
/*
|
|
* Devclass implementation
|
|
*/
|
|
|
|
static devclass_list_t devclasses = TAILQ_HEAD_INITIALIZER(devclasses);
|
|
|
|
static devclass_t
|
|
devclass_find_internal(const char *classname, int create)
|
|
{
|
|
devclass_t dc;
|
|
|
|
PDEBUG(("looking for %s", classname));
|
|
if (!classname)
|
|
return (NULL);
|
|
|
|
TAILQ_FOREACH(dc, &devclasses, link) {
|
|
if (!strcmp(dc->name, classname))
|
|
return (dc);
|
|
}
|
|
|
|
PDEBUG(("%s not found%s", classname, (create? ", creating": "")));
|
|
if (create) {
|
|
dc = malloc(sizeof(struct devclass) + strlen(classname) + 1,
|
|
M_BUS, M_NOWAIT|M_ZERO);
|
|
if (!dc)
|
|
return (NULL);
|
|
dc->name = (char*) (dc + 1);
|
|
strcpy(dc->name, classname);
|
|
TAILQ_INIT(&dc->drivers);
|
|
TAILQ_INSERT_TAIL(&devclasses, dc, link);
|
|
|
|
bus_data_generation_update();
|
|
}
|
|
|
|
return (dc);
|
|
}
|
|
|
|
devclass_t
|
|
devclass_create(const char *classname)
|
|
{
|
|
return (devclass_find_internal(classname, TRUE));
|
|
}
|
|
|
|
devclass_t
|
|
devclass_find(const char *classname)
|
|
{
|
|
return (devclass_find_internal(classname, FALSE));
|
|
}
|
|
|
|
int
|
|
devclass_add_driver(devclass_t dc, driver_t *driver)
|
|
{
|
|
driverlink_t dl;
|
|
int i;
|
|
|
|
PDEBUG(("%s", DRIVERNAME(driver)));
|
|
|
|
dl = malloc(sizeof *dl, M_BUS, M_NOWAIT|M_ZERO);
|
|
if (!dl)
|
|
return (ENOMEM);
|
|
|
|
/*
|
|
* Compile the driver's methods. Also increase the reference count
|
|
* so that the class doesn't get freed when the last instance
|
|
* goes. This means we can safely use static methods and avoids a
|
|
* double-free in devclass_delete_driver.
|
|
*/
|
|
kobj_class_compile((kobj_class_t) driver);
|
|
|
|
/*
|
|
* Make sure the devclass which the driver is implementing exists.
|
|
*/
|
|
devclass_find_internal(driver->name, TRUE);
|
|
|
|
dl->driver = driver;
|
|
TAILQ_INSERT_TAIL(&dc->drivers, dl, link);
|
|
driver->refs++;
|
|
|
|
/*
|
|
* Call BUS_DRIVER_ADDED for any existing busses in this class.
|
|
*/
|
|
for (i = 0; i < dc->maxunit; i++)
|
|
if (dc->devices[i])
|
|
BUS_DRIVER_ADDED(dc->devices[i], driver);
|
|
|
|
bus_data_generation_update();
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
devclass_delete_driver(devclass_t busclass, driver_t *driver)
|
|
{
|
|
devclass_t dc = devclass_find(driver->name);
|
|
driverlink_t dl;
|
|
device_t dev;
|
|
int i;
|
|
int error;
|
|
|
|
PDEBUG(("%s from devclass %s", driver->name, DEVCLANAME(busclass)));
|
|
|
|
if (!dc)
|
|
return (0);
|
|
|
|
/*
|
|
* Find the link structure in the bus' list of drivers.
|
|
*/
|
|
TAILQ_FOREACH(dl, &busclass->drivers, link) {
|
|
if (dl->driver == driver)
|
|
break;
|
|
}
|
|
|
|
if (!dl) {
|
|
PDEBUG(("%s not found in %s list", driver->name,
|
|
busclass->name));
|
|
return (ENOENT);
|
|
}
|
|
|
|
/*
|
|
* Disassociate from any devices. We iterate through all the
|
|
* devices in the devclass of the driver and detach any which are
|
|
* using the driver and which have a parent in the devclass which
|
|
* we are deleting from.
|
|
*
|
|
* Note that since a driver can be in multiple devclasses, we
|
|
* should not detach devices which are not children of devices in
|
|
* the affected devclass.
|
|
*/
|
|
for (i = 0; i < dc->maxunit; i++) {
|
|
if (dc->devices[i]) {
|
|
dev = dc->devices[i];
|
|
if (dev->driver == driver && dev->parent &&
|
|
dev->parent->devclass == busclass) {
|
|
if ((error = device_detach(dev)) != 0)
|
|
return (error);
|
|
device_set_driver(dev, NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
TAILQ_REMOVE(&busclass->drivers, dl, link);
|
|
free(dl, M_BUS);
|
|
|
|
driver->refs--;
|
|
if (driver->refs == 0)
|
|
kobj_class_free((kobj_class_t) driver);
|
|
|
|
bus_data_generation_update();
|
|
return (0);
|
|
}
|
|
|
|
static driverlink_t
|
|
devclass_find_driver_internal(devclass_t dc, const char *classname)
|
|
{
|
|
driverlink_t dl;
|
|
|
|
PDEBUG(("%s in devclass %s", classname, DEVCLANAME(dc)));
|
|
|
|
TAILQ_FOREACH(dl, &dc->drivers, link) {
|
|
if (!strcmp(dl->driver->name, classname))
|
|
return (dl);
|
|
}
|
|
|
|
PDEBUG(("not found"));
|
|
return (NULL);
|
|
}
|
|
|
|
driver_t *
|
|
devclass_find_driver(devclass_t dc, const char *classname)
|
|
{
|
|
driverlink_t dl;
|
|
|
|
dl = devclass_find_driver_internal(dc, classname);
|
|
if (dl)
|
|
return (dl->driver);
|
|
return (NULL);
|
|
}
|
|
|
|
const char *
|
|
devclass_get_name(devclass_t dc)
|
|
{
|
|
return (dc->name);
|
|
}
|
|
|
|
device_t
|
|
devclass_get_device(devclass_t dc, int unit)
|
|
{
|
|
if (dc == NULL || unit < 0 || unit >= dc->maxunit)
|
|
return (NULL);
|
|
return (dc->devices[unit]);
|
|
}
|
|
|
|
void *
|
|
devclass_get_softc(devclass_t dc, int unit)
|
|
{
|
|
device_t dev;
|
|
|
|
dev = devclass_get_device(dc, unit);
|
|
if (!dev)
|
|
return (NULL);
|
|
|
|
return (device_get_softc(dev));
|
|
}
|
|
|
|
int
|
|
devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp)
|
|
{
|
|
int i;
|
|
int count;
|
|
device_t *list;
|
|
|
|
count = 0;
|
|
for (i = 0; i < dc->maxunit; i++)
|
|
if (dc->devices[i])
|
|
count++;
|
|
|
|
list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT|M_ZERO);
|
|
if (!list)
|
|
return (ENOMEM);
|
|
|
|
count = 0;
|
|
for (i = 0; i < dc->maxunit; i++) {
|
|
if (dc->devices[i]) {
|
|
list[count] = dc->devices[i];
|
|
count++;
|
|
}
|
|
}
|
|
|
|
*devlistp = list;
|
|
*devcountp = count;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
devclass_get_maxunit(devclass_t dc)
|
|
{
|
|
return (dc->maxunit);
|
|
}
|
|
|
|
int
|
|
devclass_find_free_unit(devclass_t dc, int unit)
|
|
{
|
|
if (dc == NULL)
|
|
return (unit);
|
|
while (unit < dc->maxunit && dc->devices[unit] != NULL)
|
|
unit++;
|
|
return (unit);
|
|
}
|
|
|
|
static int
|
|
devclass_alloc_unit(devclass_t dc, int *unitp)
|
|
{
|
|
int unit = *unitp;
|
|
|
|
PDEBUG(("unit %d in devclass %s", unit, DEVCLANAME(dc)));
|
|
|
|
/* If we were given a wired unit number, check for existing device */
|
|
/* XXX imp XXX */
|
|
if (unit != -1) {
|
|
if (unit >= 0 && unit < dc->maxunit &&
|
|
dc->devices[unit] != NULL) {
|
|
if (bootverbose)
|
|
printf("%s: %s%d already exists; skipping it\n",
|
|
dc->name, dc->name, *unitp);
|
|
return (EEXIST);
|
|
}
|
|
} else {
|
|
/* Unwired device, find the next available slot for it */
|
|
unit = 0;
|
|
while (unit < dc->maxunit && dc->devices[unit] != NULL)
|
|
unit++;
|
|
}
|
|
|
|
/*
|
|
* We've selected a unit beyond the length of the table, so let's
|
|
* extend the table to make room for all units up to and including
|
|
* this one.
|
|
*/
|
|
if (unit >= dc->maxunit) {
|
|
device_t *newlist;
|
|
int newsize;
|
|
|
|
newsize = roundup((unit + 1), MINALLOCSIZE / sizeof(device_t));
|
|
newlist = malloc(sizeof(device_t) * newsize, M_BUS, M_NOWAIT);
|
|
if (!newlist)
|
|
return (ENOMEM);
|
|
bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit);
|
|
bzero(newlist + dc->maxunit,
|
|
sizeof(device_t) * (newsize - dc->maxunit));
|
|
if (dc->devices)
|
|
free(dc->devices, M_BUS);
|
|
dc->devices = newlist;
|
|
dc->maxunit = newsize;
|
|
}
|
|
PDEBUG(("now: unit %d in devclass %s", unit, DEVCLANAME(dc)));
|
|
|
|
*unitp = unit;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
devclass_add_device(devclass_t dc, device_t dev)
|
|
{
|
|
int buflen, error;
|
|
|
|
PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
|
|
|
|
buflen = snprintf(NULL, 0, "%s%d$", dc->name, dev->unit);
|
|
if (buflen < 0)
|
|
return (ENOMEM);
|
|
dev->nameunit = malloc(buflen, M_BUS, M_NOWAIT|M_ZERO);
|
|
if (!dev->nameunit)
|
|
return (ENOMEM);
|
|
|
|
if ((error = devclass_alloc_unit(dc, &dev->unit)) != 0) {
|
|
free(dev->nameunit, M_BUS);
|
|
dev->nameunit = NULL;
|
|
return (error);
|
|
}
|
|
dc->devices[dev->unit] = dev;
|
|
dev->devclass = dc;
|
|
snprintf(dev->nameunit, buflen, "%s%d", dc->name, dev->unit);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
devclass_delete_device(devclass_t dc, device_t dev)
|
|
{
|
|
if (!dc || !dev)
|
|
return (0);
|
|
|
|
PDEBUG(("%s in devclass %s", DEVICENAME(dev), DEVCLANAME(dc)));
|
|
|
|
if (dev->devclass != dc || dc->devices[dev->unit] != dev)
|
|
panic("devclass_delete_device: inconsistent device class");
|
|
dc->devices[dev->unit] = NULL;
|
|
if (dev->flags & DF_WILDCARD)
|
|
dev->unit = -1;
|
|
dev->devclass = NULL;
|
|
free(dev->nameunit, M_BUS);
|
|
dev->nameunit = NULL;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_t
|
|
make_device(device_t parent, const char *name, int unit)
|
|
{
|
|
device_t dev;
|
|
devclass_t dc;
|
|
|
|
PDEBUG(("%s at %s as unit %d", name, DEVICENAME(parent), unit));
|
|
|
|
if (name) {
|
|
dc = devclass_find_internal(name, TRUE);
|
|
if (!dc) {
|
|
printf("make_device: can't find device class %s\n",
|
|
name);
|
|
return (NULL);
|
|
}
|
|
} else {
|
|
dc = NULL;
|
|
}
|
|
|
|
dev = malloc(sizeof(struct device), M_BUS, M_NOWAIT|M_ZERO);
|
|
if (!dev)
|
|
return (NULL);
|
|
|
|
dev->parent = parent;
|
|
TAILQ_INIT(&dev->children);
|
|
kobj_init((kobj_t) dev, &null_class);
|
|
dev->driver = NULL;
|
|
dev->devclass = NULL;
|
|
dev->unit = unit;
|
|
dev->nameunit = NULL;
|
|
dev->desc = NULL;
|
|
dev->busy = 0;
|
|
dev->devflags = 0;
|
|
dev->flags = DF_ENABLED;
|
|
dev->order = 0;
|
|
if (unit == -1)
|
|
dev->flags |= DF_WILDCARD;
|
|
if (name) {
|
|
dev->flags |= DF_FIXEDCLASS;
|
|
if (devclass_add_device(dc, dev)) {
|
|
kobj_delete((kobj_t) dev, M_BUS);
|
|
return (NULL);
|
|
}
|
|
}
|
|
dev->ivars = NULL;
|
|
dev->softc = NULL;
|
|
|
|
dev->state = DS_NOTPRESENT;
|
|
|
|
TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink);
|
|
bus_data_generation_update();
|
|
|
|
return (dev);
|
|
}
|
|
|
|
static int
|
|
device_print_child(device_t dev, device_t child)
|
|
{
|
|
int retval = 0;
|
|
|
|
if (device_is_alive(child))
|
|
retval += BUS_PRINT_CHILD(dev, child);
|
|
else
|
|
retval += device_printf(child, " not found\n");
|
|
|
|
return (retval);
|
|
}
|
|
|
|
device_t
|
|
device_add_child(device_t dev, const char *name, int unit)
|
|
{
|
|
return (device_add_child_ordered(dev, 0, name, unit));
|
|
}
|
|
|
|
device_t
|
|
device_add_child_ordered(device_t dev, int order, const char *name, int unit)
|
|
{
|
|
device_t child;
|
|
device_t place;
|
|
|
|
PDEBUG(("%s at %s with order %d as unit %d",
|
|
name, DEVICENAME(dev), order, unit));
|
|
|
|
child = make_device(dev, name, unit);
|
|
if (child == NULL)
|
|
return (child);
|
|
child->order = order;
|
|
|
|
TAILQ_FOREACH(place, &dev->children, link) {
|
|
if (place->order > order)
|
|
break;
|
|
}
|
|
|
|
if (place) {
|
|
/*
|
|
* The device 'place' is the first device whose order is
|
|
* greater than the new child.
|
|
*/
|
|
TAILQ_INSERT_BEFORE(place, child, link);
|
|
} else {
|
|
/*
|
|
* The new child's order is greater or equal to the order of
|
|
* any existing device. Add the child to the tail of the list.
|
|
*/
|
|
TAILQ_INSERT_TAIL(&dev->children, child, link);
|
|
}
|
|
|
|
bus_data_generation_update();
|
|
return (child);
|
|
}
|
|
|
|
int
|
|
device_delete_child(device_t dev, device_t child)
|
|
{
|
|
int error;
|
|
device_t grandchild;
|
|
|
|
PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev)));
|
|
|
|
/* remove children first */
|
|
while ( (grandchild = TAILQ_FIRST(&child->children)) ) {
|
|
error = device_delete_child(child, grandchild);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
if ((error = device_detach(child)) != 0)
|
|
return (error);
|
|
if (child->devclass)
|
|
devclass_delete_device(child->devclass, child);
|
|
TAILQ_REMOVE(&dev->children, child, link);
|
|
TAILQ_REMOVE(&bus_data_devices, child, devlink);
|
|
device_set_desc(child, NULL);
|
|
kobj_delete((kobj_t) child, M_BUS);
|
|
|
|
bus_data_generation_update();
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Find only devices attached to this bus.
|
|
*/
|
|
device_t
|
|
device_find_child(device_t dev, const char *classname, int unit)
|
|
{
|
|
devclass_t dc;
|
|
device_t child;
|
|
|
|
dc = devclass_find(classname);
|
|
if (!dc)
|
|
return (NULL);
|
|
|
|
child = devclass_get_device(dc, unit);
|
|
if (child && child->parent == dev)
|
|
return (child);
|
|
return (NULL);
|
|
}
|
|
|
|
static driverlink_t
|
|
first_matching_driver(devclass_t dc, device_t dev)
|
|
{
|
|
if (dev->devclass)
|
|
return (devclass_find_driver_internal(dc, dev->devclass->name));
|
|
return (TAILQ_FIRST(&dc->drivers));
|
|
}
|
|
|
|
static driverlink_t
|
|
next_matching_driver(devclass_t dc, device_t dev, driverlink_t last)
|
|
{
|
|
if (dev->devclass) {
|
|
driverlink_t dl;
|
|
for (dl = TAILQ_NEXT(last, link); dl; dl = TAILQ_NEXT(dl, link))
|
|
if (!strcmp(dev->devclass->name, dl->driver->name))
|
|
return (dl);
|
|
return (NULL);
|
|
}
|
|
return (TAILQ_NEXT(last, link));
|
|
}
|
|
|
|
static int
|
|
device_probe_child(device_t dev, device_t child)
|
|
{
|
|
devclass_t dc;
|
|
driverlink_t best = 0;
|
|
driverlink_t dl;
|
|
int result, pri = 0;
|
|
int hasclass = (child->devclass != 0);
|
|
|
|
dc = dev->devclass;
|
|
if (!dc)
|
|
panic("device_probe_child: parent device has no devclass");
|
|
|
|
if (child->state == DS_ALIVE)
|
|
return (0);
|
|
|
|
for (dl = first_matching_driver(dc, child);
|
|
dl;
|
|
dl = next_matching_driver(dc, child, dl)) {
|
|
PDEBUG(("Trying %s", DRIVERNAME(dl->driver)));
|
|
device_set_driver(child, dl->driver);
|
|
if (!hasclass)
|
|
device_set_devclass(child, dl->driver->name);
|
|
result = DEVICE_PROBE(child);
|
|
if (!hasclass)
|
|
device_set_devclass(child, 0);
|
|
|
|
/*
|
|
* If the driver returns SUCCESS, there can be no higher match
|
|
* for this device.
|
|
*/
|
|
if (result == 0) {
|
|
best = dl;
|
|
pri = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* The driver returned an error so it certainly doesn't match.
|
|
*/
|
|
if (result > 0) {
|
|
device_set_driver(child, 0);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* A priority lower than SUCCESS, remember the best matching
|
|
* driver. Initialise the value of pri for the first match.
|
|
*/
|
|
if (best == 0 || result > pri) {
|
|
best = dl;
|
|
pri = result;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we found a driver, change state and initialise the devclass.
|
|
*/
|
|
if (best) {
|
|
if (!child->devclass)
|
|
device_set_devclass(child, best->driver->name);
|
|
device_set_driver(child, best->driver);
|
|
if (pri < 0) {
|
|
/*
|
|
* A bit bogus. Call the probe method again to make
|
|
* sure that we have the right description.
|
|
*/
|
|
DEVICE_PROBE(child);
|
|
}
|
|
child->state = DS_ALIVE;
|
|
|
|
bus_data_generation_update();
|
|
return (0);
|
|
}
|
|
|
|
return (ENXIO);
|
|
}
|
|
|
|
device_t
|
|
device_get_parent(device_t dev)
|
|
{
|
|
return (dev->parent);
|
|
}
|
|
|
|
int
|
|
device_get_children(device_t dev, device_t **devlistp, int *devcountp)
|
|
{
|
|
int count;
|
|
device_t child;
|
|
device_t *list;
|
|
|
|
count = 0;
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
count++;
|
|
}
|
|
|
|
list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT|M_ZERO);
|
|
if (!list)
|
|
return (ENOMEM);
|
|
|
|
count = 0;
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
list[count] = child;
|
|
count++;
|
|
}
|
|
|
|
*devlistp = list;
|
|
*devcountp = count;
|
|
|
|
return (0);
|
|
}
|
|
|
|
driver_t *
|
|
device_get_driver(device_t dev)
|
|
{
|
|
return (dev->driver);
|
|
}
|
|
|
|
devclass_t
|
|
device_get_devclass(device_t dev)
|
|
{
|
|
return (dev->devclass);
|
|
}
|
|
|
|
const char *
|
|
device_get_name(device_t dev)
|
|
{
|
|
if (dev != NULL && dev->devclass)
|
|
return (devclass_get_name(dev->devclass));
|
|
return (NULL);
|
|
}
|
|
|
|
const char *
|
|
device_get_nameunit(device_t dev)
|
|
{
|
|
return (dev->nameunit);
|
|
}
|
|
|
|
int
|
|
device_get_unit(device_t dev)
|
|
{
|
|
return (dev->unit);
|
|
}
|
|
|
|
const char *
|
|
device_get_desc(device_t dev)
|
|
{
|
|
return (dev->desc);
|
|
}
|
|
|
|
u_int32_t
|
|
device_get_flags(device_t dev)
|
|
{
|
|
return (dev->devflags);
|
|
}
|
|
|
|
int
|
|
device_print_prettyname(device_t dev)
|
|
{
|
|
const char *name = device_get_name(dev);
|
|
|
|
if (name == 0)
|
|
return (printf("unknown: "));
|
|
return (printf("%s%d: ", name, device_get_unit(dev)));
|
|
}
|
|
|
|
int
|
|
device_printf(device_t dev, const char * fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int retval;
|
|
|
|
retval = device_print_prettyname(dev);
|
|
va_start(ap, fmt);
|
|
retval += vprintf(fmt, ap);
|
|
va_end(ap);
|
|
return (retval);
|
|
}
|
|
|
|
static void
|
|
device_set_desc_internal(device_t dev, const char* desc, int copy)
|
|
{
|
|
if (dev->desc && (dev->flags & DF_DESCMALLOCED)) {
|
|
free(dev->desc, M_BUS);
|
|
dev->flags &= ~DF_DESCMALLOCED;
|
|
dev->desc = NULL;
|
|
}
|
|
|
|
if (copy && desc) {
|
|
dev->desc = malloc(strlen(desc) + 1, M_BUS, M_NOWAIT);
|
|
if (dev->desc) {
|
|
strcpy(dev->desc, desc);
|
|
dev->flags |= DF_DESCMALLOCED;
|
|
}
|
|
} else {
|
|
/* Avoid a -Wcast-qual warning */
|
|
dev->desc = (char *)(uintptr_t) desc;
|
|
}
|
|
|
|
bus_data_generation_update();
|
|
}
|
|
|
|
void
|
|
device_set_desc(device_t dev, const char* desc)
|
|
{
|
|
device_set_desc_internal(dev, desc, FALSE);
|
|
}
|
|
|
|
void
|
|
device_set_desc_copy(device_t dev, const char* desc)
|
|
{
|
|
device_set_desc_internal(dev, desc, TRUE);
|
|
}
|
|
|
|
void
|
|
device_set_flags(device_t dev, u_int32_t flags)
|
|
{
|
|
dev->devflags = flags;
|
|
}
|
|
|
|
void *
|
|
device_get_softc(device_t dev)
|
|
{
|
|
return (dev->softc);
|
|
}
|
|
|
|
void
|
|
device_set_softc(device_t dev, void *softc)
|
|
{
|
|
if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC))
|
|
free(dev->softc, M_BUS);
|
|
dev->softc = softc;
|
|
if (dev->softc)
|
|
dev->flags |= DF_EXTERNALSOFTC;
|
|
else
|
|
dev->flags &= ~DF_EXTERNALSOFTC;
|
|
}
|
|
|
|
void *
|
|
device_get_ivars(device_t dev)
|
|
{
|
|
|
|
KASSERT(dev != NULL, ("device_get_ivars(NULL, ...)"));
|
|
return (dev->ivars);
|
|
}
|
|
|
|
void
|
|
device_set_ivars(device_t dev, void * ivars)
|
|
{
|
|
|
|
KASSERT(dev != NULL, ("device_set_ivars(NULL, ...)"));
|
|
dev->ivars = ivars;
|
|
}
|
|
|
|
device_state_t
|
|
device_get_state(device_t dev)
|
|
{
|
|
return (dev->state);
|
|
}
|
|
|
|
void
|
|
device_enable(device_t dev)
|
|
{
|
|
dev->flags |= DF_ENABLED;
|
|
}
|
|
|
|
void
|
|
device_disable(device_t dev)
|
|
{
|
|
dev->flags &= ~DF_ENABLED;
|
|
}
|
|
|
|
void
|
|
device_busy(device_t dev)
|
|
{
|
|
if (dev->state < DS_ATTACHED)
|
|
panic("device_busy: called for unattached device");
|
|
if (dev->busy == 0 && dev->parent)
|
|
device_busy(dev->parent);
|
|
dev->busy++;
|
|
dev->state = DS_BUSY;
|
|
}
|
|
|
|
void
|
|
device_unbusy(device_t dev)
|
|
{
|
|
if (dev->state != DS_BUSY)
|
|
panic("device_unbusy: called for non-busy device");
|
|
dev->busy--;
|
|
if (dev->busy == 0) {
|
|
if (dev->parent)
|
|
device_unbusy(dev->parent);
|
|
dev->state = DS_ATTACHED;
|
|
}
|
|
}
|
|
|
|
void
|
|
device_quiet(device_t dev)
|
|
{
|
|
dev->flags |= DF_QUIET;
|
|
}
|
|
|
|
void
|
|
device_verbose(device_t dev)
|
|
{
|
|
dev->flags &= ~DF_QUIET;
|
|
}
|
|
|
|
int
|
|
device_is_quiet(device_t dev)
|
|
{
|
|
return ((dev->flags & DF_QUIET) != 0);
|
|
}
|
|
|
|
int
|
|
device_is_enabled(device_t dev)
|
|
{
|
|
return ((dev->flags & DF_ENABLED) != 0);
|
|
}
|
|
|
|
int
|
|
device_is_alive(device_t dev)
|
|
{
|
|
return (dev->state >= DS_ALIVE);
|
|
}
|
|
|
|
int
|
|
device_is_attached(device_t dev)
|
|
{
|
|
return (dev->state >= DS_ATTACHED);
|
|
}
|
|
|
|
int
|
|
device_set_devclass(device_t dev, const char *classname)
|
|
{
|
|
devclass_t dc;
|
|
int error;
|
|
|
|
if (!classname) {
|
|
if (dev->devclass)
|
|
devclass_delete_device(dev->devclass, dev);
|
|
return (0);
|
|
}
|
|
|
|
if (dev->devclass) {
|
|
printf("device_set_devclass: device class already set\n");
|
|
return (EINVAL);
|
|
}
|
|
|
|
dc = devclass_find_internal(classname, TRUE);
|
|
if (!dc)
|
|
return (ENOMEM);
|
|
|
|
error = devclass_add_device(dc, dev);
|
|
|
|
bus_data_generation_update();
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
device_set_driver(device_t dev, driver_t *driver)
|
|
{
|
|
if (dev->state >= DS_ATTACHED)
|
|
return (EBUSY);
|
|
|
|
if (dev->driver == driver)
|
|
return (0);
|
|
|
|
if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) {
|
|
free(dev->softc, M_BUS);
|
|
dev->softc = NULL;
|
|
}
|
|
kobj_delete((kobj_t) dev, 0);
|
|
dev->driver = driver;
|
|
if (driver) {
|
|
kobj_init((kobj_t) dev, (kobj_class_t) driver);
|
|
if (!(dev->flags & DF_EXTERNALSOFTC) && driver->size > 0) {
|
|
dev->softc = malloc(driver->size, M_BUS,
|
|
M_NOWAIT | M_ZERO);
|
|
if (!dev->softc) {
|
|
kobj_delete((kobj_t) dev, 0);
|
|
kobj_init((kobj_t) dev, &null_class);
|
|
dev->driver = NULL;
|
|
return (ENOMEM);
|
|
}
|
|
}
|
|
} else {
|
|
kobj_init((kobj_t) dev, &null_class);
|
|
}
|
|
|
|
bus_data_generation_update();
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
device_probe_and_attach(device_t dev)
|
|
{
|
|
device_t bus = dev->parent;
|
|
int error = 0;
|
|
int hasclass = (dev->devclass != 0);
|
|
|
|
if (dev->state >= DS_ALIVE)
|
|
return (0);
|
|
|
|
if (dev->flags & DF_ENABLED) {
|
|
error = device_probe_child(bus, dev);
|
|
if (!error) {
|
|
if (!device_is_quiet(dev))
|
|
device_print_child(bus, dev);
|
|
error = DEVICE_ATTACH(dev);
|
|
if (!error) {
|
|
dev->state = DS_ATTACHED;
|
|
devadded(dev);
|
|
} else {
|
|
printf("device_probe_and_attach: %s%d attach returned %d\n",
|
|
dev->driver->name, dev->unit, error);
|
|
/* Unset the class; set in device_probe_child */
|
|
if (!hasclass)
|
|
device_set_devclass(dev, 0);
|
|
device_set_driver(dev, NULL);
|
|
dev->state = DS_NOTPRESENT;
|
|
}
|
|
} else {
|
|
if (!(dev->flags & DF_DONENOMATCH)) {
|
|
BUS_PROBE_NOMATCH(bus, dev);
|
|
devnomatch(dev);
|
|
dev->flags |= DF_DONENOMATCH;
|
|
}
|
|
}
|
|
} else {
|
|
if (bootverbose) {
|
|
device_print_prettyname(dev);
|
|
printf("not probed (disabled)\n");
|
|
}
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
device_detach(device_t dev)
|
|
{
|
|
int error;
|
|
|
|
PDEBUG(("%s", DEVICENAME(dev)));
|
|
if (dev->state == DS_BUSY)
|
|
return (EBUSY);
|
|
if (dev->state != DS_ATTACHED)
|
|
return (0);
|
|
|
|
if ((error = DEVICE_DETACH(dev)) != 0)
|
|
return (error);
|
|
devremoved(dev);
|
|
device_printf(dev, "detached\n");
|
|
if (dev->parent)
|
|
BUS_CHILD_DETACHED(dev->parent, dev);
|
|
|
|
if (!(dev->flags & DF_FIXEDCLASS))
|
|
devclass_delete_device(dev->devclass, dev);
|
|
|
|
dev->state = DS_NOTPRESENT;
|
|
device_set_driver(dev, NULL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
device_shutdown(device_t dev)
|
|
{
|
|
if (dev->state < DS_ATTACHED)
|
|
return (0);
|
|
return (DEVICE_SHUTDOWN(dev));
|
|
}
|
|
|
|
int
|
|
device_set_unit(device_t dev, int unit)
|
|
{
|
|
devclass_t dc;
|
|
int err;
|
|
|
|
dc = device_get_devclass(dev);
|
|
if (unit < dc->maxunit && dc->devices[unit])
|
|
return (EBUSY);
|
|
err = devclass_delete_device(dc, dev);
|
|
if (err)
|
|
return (err);
|
|
dev->unit = unit;
|
|
err = devclass_add_device(dc, dev);
|
|
if (err)
|
|
return (err);
|
|
|
|
bus_data_generation_update();
|
|
return (0);
|
|
}
|
|
|
|
/*======================================*/
|
|
/*
|
|
* Some useful method implementations to make life easier for bus drivers.
|
|
*/
|
|
|
|
void
|
|
resource_list_init(struct resource_list *rl)
|
|
{
|
|
SLIST_INIT(rl);
|
|
}
|
|
|
|
void
|
|
resource_list_free(struct resource_list *rl)
|
|
{
|
|
struct resource_list_entry *rle;
|
|
|
|
while ((rle = SLIST_FIRST(rl)) != NULL) {
|
|
if (rle->res)
|
|
panic("resource_list_free: resource entry is busy");
|
|
SLIST_REMOVE_HEAD(rl, link);
|
|
free(rle, M_BUS);
|
|
}
|
|
}
|
|
|
|
int
|
|
resource_list_add_next(struct resource_list *rl, int type, u_long start,
|
|
u_long end, u_long count)
|
|
{
|
|
int rid;
|
|
|
|
rid = 0;
|
|
while (resource_list_find(rl, type, rid) != NULL)
|
|
rid++;
|
|
resource_list_add(rl, type, rid, start, end, count);
|
|
return (rid);
|
|
}
|
|
|
|
void
|
|
resource_list_add(struct resource_list *rl, int type, int rid,
|
|
u_long start, u_long end, u_long count)
|
|
{
|
|
struct resource_list_entry *rle;
|
|
|
|
rle = resource_list_find(rl, type, rid);
|
|
if (!rle) {
|
|
rle = malloc(sizeof(struct resource_list_entry), M_BUS,
|
|
M_NOWAIT);
|
|
if (!rle)
|
|
panic("resource_list_add: can't record entry");
|
|
SLIST_INSERT_HEAD(rl, rle, link);
|
|
rle->type = type;
|
|
rle->rid = rid;
|
|
rle->res = NULL;
|
|
}
|
|
|
|
if (rle->res)
|
|
panic("resource_list_add: resource entry is busy");
|
|
|
|
rle->start = start;
|
|
rle->end = end;
|
|
rle->count = count;
|
|
}
|
|
|
|
struct resource_list_entry *
|
|
resource_list_find(struct resource_list *rl, int type, int rid)
|
|
{
|
|
struct resource_list_entry *rle;
|
|
|
|
SLIST_FOREACH(rle, rl, link) {
|
|
if (rle->type == type && rle->rid == rid)
|
|
return (rle);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
void
|
|
resource_list_delete(struct resource_list *rl, int type, int rid)
|
|
{
|
|
struct resource_list_entry *rle = resource_list_find(rl, type, rid);
|
|
|
|
if (rle) {
|
|
if (rle->res != NULL)
|
|
panic("resource_list_delete: resource has not been released");
|
|
SLIST_REMOVE(rl, rle, resource_list_entry, link);
|
|
free(rle, M_BUS);
|
|
}
|
|
}
|
|
|
|
struct resource *
|
|
resource_list_alloc(struct resource_list *rl, device_t bus, device_t child,
|
|
int type, int *rid, u_long start, u_long end, u_long count, u_int flags)
|
|
{
|
|
struct resource_list_entry *rle = 0;
|
|
int passthrough = (device_get_parent(child) != bus);
|
|
int isdefault = (start == 0UL && end == ~0UL);
|
|
|
|
if (passthrough) {
|
|
return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
|
|
type, rid, start, end, count, flags));
|
|
}
|
|
|
|
rle = resource_list_find(rl, type, *rid);
|
|
|
|
if (!rle)
|
|
return (NULL); /* no resource of that type/rid */
|
|
|
|
if (rle->res)
|
|
panic("resource_list_alloc: resource entry is busy");
|
|
|
|
if (isdefault) {
|
|
start = rle->start;
|
|
count = ulmax(count, rle->count);
|
|
end = ulmax(rle->end, start + count - 1);
|
|
}
|
|
|
|
rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
|
|
type, rid, start, end, count, flags);
|
|
|
|
/*
|
|
* Record the new range.
|
|
*/
|
|
if (rle->res) {
|
|
rle->start = rman_get_start(rle->res);
|
|
rle->end = rman_get_end(rle->res);
|
|
rle->count = count;
|
|
}
|
|
|
|
return (rle->res);
|
|
}
|
|
|
|
int
|
|
resource_list_release(struct resource_list *rl, device_t bus, device_t child,
|
|
int type, int rid, struct resource *res)
|
|
{
|
|
struct resource_list_entry *rle = 0;
|
|
int passthrough = (device_get_parent(child) != bus);
|
|
int error;
|
|
|
|
if (passthrough) {
|
|
return (BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
|
|
type, rid, res));
|
|
}
|
|
|
|
rle = resource_list_find(rl, type, rid);
|
|
|
|
if (!rle)
|
|
panic("resource_list_release: can't find resource");
|
|
if (!rle->res)
|
|
panic("resource_list_release: resource entry is not busy");
|
|
|
|
error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
|
|
type, rid, res);
|
|
if (error)
|
|
return (error);
|
|
|
|
rle->res = NULL;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
resource_list_print_type(struct resource_list *rl, const char *name, int type,
|
|
const char *format)
|
|
{
|
|
struct resource_list_entry *rle;
|
|
int printed, retval;
|
|
|
|
printed = 0;
|
|
retval = 0;
|
|
/* Yes, this is kinda cheating */
|
|
SLIST_FOREACH(rle, rl, link) {
|
|
if (rle->type == type) {
|
|
if (printed == 0)
|
|
retval += printf(" %s ", name);
|
|
else
|
|
retval += printf(",");
|
|
printed++;
|
|
retval += printf(format, rle->start);
|
|
if (rle->count > 1) {
|
|
retval += printf("-");
|
|
retval += printf(format, rle->start +
|
|
rle->count - 1);
|
|
}
|
|
}
|
|
}
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* Call DEVICE_IDENTIFY for each driver.
|
|
*/
|
|
int
|
|
bus_generic_probe(device_t dev)
|
|
{
|
|
devclass_t dc = dev->devclass;
|
|
driverlink_t dl;
|
|
|
|
TAILQ_FOREACH(dl, &dc->drivers, link) {
|
|
DEVICE_IDENTIFY(dl->driver, dev);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bus_generic_attach(device_t dev)
|
|
{
|
|
device_t child;
|
|
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
device_probe_and_attach(child);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bus_generic_detach(device_t dev)
|
|
{
|
|
device_t child;
|
|
int error;
|
|
|
|
if (dev->state != DS_ATTACHED)
|
|
return (EBUSY);
|
|
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
if ((error = device_detach(child)) != 0)
|
|
return (error);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bus_generic_shutdown(device_t dev)
|
|
{
|
|
device_t child;
|
|
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
device_shutdown(child);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bus_generic_suspend(device_t dev)
|
|
{
|
|
int error;
|
|
device_t child, child2;
|
|
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
error = DEVICE_SUSPEND(child);
|
|
if (error) {
|
|
for (child2 = TAILQ_FIRST(&dev->children);
|
|
child2 && child2 != child;
|
|
child2 = TAILQ_NEXT(child2, link))
|
|
DEVICE_RESUME(child2);
|
|
return (error);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bus_generic_resume(device_t dev)
|
|
{
|
|
device_t child;
|
|
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
DEVICE_RESUME(child);
|
|
/* if resume fails, there's nothing we can usefully do... */
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bus_print_child_header (device_t dev, device_t child)
|
|
{
|
|
int retval = 0;
|
|
|
|
if (device_get_desc(child)) {
|
|
retval += device_printf(child, "<%s>", device_get_desc(child));
|
|
} else {
|
|
retval += printf("%s", device_get_nameunit(child));
|
|
}
|
|
|
|
return (retval);
|
|
}
|
|
|
|
int
|
|
bus_print_child_footer (device_t dev, device_t child)
|
|
{
|
|
return (printf(" on %s\n", device_get_nameunit(dev)));
|
|
}
|
|
|
|
int
|
|
bus_generic_print_child(device_t dev, device_t child)
|
|
{
|
|
int retval = 0;
|
|
|
|
retval += bus_print_child_header(dev, child);
|
|
retval += bus_print_child_footer(dev, child);
|
|
|
|
return (retval);
|
|
}
|
|
|
|
int
|
|
bus_generic_read_ivar(device_t dev, device_t child, int index,
|
|
uintptr_t * result)
|
|
{
|
|
return (ENOENT);
|
|
}
|
|
|
|
int
|
|
bus_generic_write_ivar(device_t dev, device_t child, int index,
|
|
uintptr_t value)
|
|
{
|
|
return (ENOENT);
|
|
}
|
|
|
|
struct resource_list *
|
|
bus_generic_get_resource_list (device_t dev, device_t child)
|
|
{
|
|
return (NULL);
|
|
}
|
|
|
|
void
|
|
bus_generic_driver_added(device_t dev, driver_t *driver)
|
|
{
|
|
device_t child;
|
|
|
|
DEVICE_IDENTIFY(driver, dev);
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
if (child->state == DS_NOTPRESENT)
|
|
device_probe_and_attach(child);
|
|
}
|
|
}
|
|
|
|
int
|
|
bus_generic_setup_intr(device_t dev, device_t child, struct resource *irq,
|
|
int flags, driver_intr_t *intr, void *arg, void **cookiep)
|
|
{
|
|
/* Propagate up the bus hierarchy until someone handles it. */
|
|
if (dev->parent)
|
|
return (BUS_SETUP_INTR(dev->parent, child, irq, flags,
|
|
intr, arg, cookiep));
|
|
return (EINVAL);
|
|
}
|
|
|
|
int
|
|
bus_generic_teardown_intr(device_t dev, device_t child, struct resource *irq,
|
|
void *cookie)
|
|
{
|
|
/* Propagate up the bus hierarchy until someone handles it. */
|
|
if (dev->parent)
|
|
return (BUS_TEARDOWN_INTR(dev->parent, child, irq, cookie));
|
|
return (EINVAL);
|
|
}
|
|
|
|
struct resource *
|
|
bus_generic_alloc_resource(device_t dev, device_t child, int type, int *rid,
|
|
u_long start, u_long end, u_long count, u_int flags)
|
|
{
|
|
/* Propagate up the bus hierarchy until someone handles it. */
|
|
if (dev->parent)
|
|
return (BUS_ALLOC_RESOURCE(dev->parent, child, type, rid,
|
|
start, end, count, flags));
|
|
return (NULL);
|
|
}
|
|
|
|
int
|
|
bus_generic_release_resource(device_t dev, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
/* Propagate up the bus hierarchy until someone handles it. */
|
|
if (dev->parent)
|
|
return (BUS_RELEASE_RESOURCE(dev->parent, child, type, rid,
|
|
r));
|
|
return (EINVAL);
|
|
}
|
|
|
|
int
|
|
bus_generic_activate_resource(device_t dev, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
/* Propagate up the bus hierarchy until someone handles it. */
|
|
if (dev->parent)
|
|
return (BUS_ACTIVATE_RESOURCE(dev->parent, child, type, rid,
|
|
r));
|
|
return (EINVAL);
|
|
}
|
|
|
|
int
|
|
bus_generic_deactivate_resource(device_t dev, device_t child, int type,
|
|
int rid, struct resource *r)
|
|
{
|
|
/* Propagate up the bus hierarchy until someone handles it. */
|
|
if (dev->parent)
|
|
return (BUS_DEACTIVATE_RESOURCE(dev->parent, child, type, rid,
|
|
r));
|
|
return (EINVAL);
|
|
}
|
|
|
|
int
|
|
bus_generic_rl_get_resource (device_t dev, device_t child, int type, int rid,
|
|
u_long *startp, u_long *countp)
|
|
{
|
|
struct resource_list * rl = NULL;
|
|
struct resource_list_entry * rle = NULL;
|
|
|
|
rl = BUS_GET_RESOURCE_LIST(dev, child);
|
|
if (!rl)
|
|
return (EINVAL);
|
|
|
|
rle = resource_list_find(rl, type, rid);
|
|
if (!rle)
|
|
return (ENOENT);
|
|
|
|
if (startp)
|
|
*startp = rle->start;
|
|
if (countp)
|
|
*countp = rle->count;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bus_generic_rl_set_resource (device_t dev, device_t child, int type, int rid,
|
|
u_long start, u_long count)
|
|
{
|
|
struct resource_list * rl = NULL;
|
|
|
|
rl = BUS_GET_RESOURCE_LIST(dev, child);
|
|
if (!rl)
|
|
return (EINVAL);
|
|
|
|
resource_list_add(rl, type, rid, start, (start + count - 1), count);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
bus_generic_rl_delete_resource (device_t dev, device_t child, int type, int rid)
|
|
{
|
|
struct resource_list * rl = NULL;
|
|
|
|
rl = BUS_GET_RESOURCE_LIST(dev, child);
|
|
if (!rl)
|
|
return;
|
|
|
|
resource_list_delete(rl, type, rid);
|
|
|
|
return;
|
|
}
|
|
|
|
int
|
|
bus_generic_rl_release_resource (device_t dev, device_t child, int type,
|
|
int rid, struct resource *r)
|
|
{
|
|
struct resource_list * rl = NULL;
|
|
|
|
rl = BUS_GET_RESOURCE_LIST(dev, child);
|
|
if (!rl)
|
|
return (EINVAL);
|
|
|
|
return (resource_list_release(rl, dev, child, type, rid, r));
|
|
}
|
|
|
|
struct resource *
|
|
bus_generic_rl_alloc_resource (device_t dev, device_t child, int type,
|
|
int *rid, u_long start, u_long end, u_long count, u_int flags)
|
|
{
|
|
struct resource_list * rl = NULL;
|
|
|
|
rl = BUS_GET_RESOURCE_LIST(dev, child);
|
|
if (!rl)
|
|
return (NULL);
|
|
|
|
return (resource_list_alloc(rl, dev, child, type, rid,
|
|
start, end, count, flags));
|
|
}
|
|
|
|
int
|
|
bus_generic_child_present(device_t bus, device_t child)
|
|
{
|
|
return (BUS_CHILD_PRESENT(device_get_parent(bus), bus));
|
|
}
|
|
|
|
/*
|
|
* Some convenience functions to make it easier for drivers to use the
|
|
* resource-management functions. All these really do is hide the
|
|
* indirection through the parent's method table, making for slightly
|
|
* less-wordy code. In the future, it might make sense for this code
|
|
* to maintain some sort of a list of resources allocated by each device.
|
|
*/
|
|
struct resource *
|
|
bus_alloc_resource(device_t dev, int type, int *rid, u_long start, u_long end,
|
|
u_long count, u_int flags)
|
|
{
|
|
if (dev->parent == 0)
|
|
return (0);
|
|
return (BUS_ALLOC_RESOURCE(dev->parent, dev, type, rid, start, end,
|
|
count, flags));
|
|
}
|
|
|
|
int
|
|
bus_activate_resource(device_t dev, int type, int rid, struct resource *r)
|
|
{
|
|
if (dev->parent == 0)
|
|
return (EINVAL);
|
|
return (BUS_ACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
|
|
}
|
|
|
|
int
|
|
bus_deactivate_resource(device_t dev, int type, int rid, struct resource *r)
|
|
{
|
|
if (dev->parent == 0)
|
|
return (EINVAL);
|
|
return (BUS_DEACTIVATE_RESOURCE(dev->parent, dev, type, rid, r));
|
|
}
|
|
|
|
int
|
|
bus_release_resource(device_t dev, int type, int rid, struct resource *r)
|
|
{
|
|
if (dev->parent == 0)
|
|
return (EINVAL);
|
|
return (BUS_RELEASE_RESOURCE(dev->parent, dev, type, rid, r));
|
|
}
|
|
|
|
int
|
|
bus_setup_intr(device_t dev, struct resource *r, int flags,
|
|
driver_intr_t handler, void *arg, void **cookiep)
|
|
{
|
|
int error;
|
|
|
|
if (dev->parent != 0) {
|
|
error = BUS_SETUP_INTR(dev->parent, dev, r, flags,
|
|
handler, arg, cookiep);
|
|
if (error == 0) {
|
|
if (flags & INTR_MPSAFE)
|
|
device_printf(dev, "[MPSAFE]\n");
|
|
if (flags & INTR_FAST)
|
|
device_printf(dev, "[FAST]\n");
|
|
}
|
|
} else
|
|
error = EINVAL;
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
bus_teardown_intr(device_t dev, struct resource *r, void *cookie)
|
|
{
|
|
if (dev->parent == 0)
|
|
return (EINVAL);
|
|
return (BUS_TEARDOWN_INTR(dev->parent, dev, r, cookie));
|
|
}
|
|
|
|
int
|
|
bus_set_resource(device_t dev, int type, int rid,
|
|
u_long start, u_long count)
|
|
{
|
|
return (BUS_SET_RESOURCE(device_get_parent(dev), dev, type, rid,
|
|
start, count));
|
|
}
|
|
|
|
int
|
|
bus_get_resource(device_t dev, int type, int rid,
|
|
u_long *startp, u_long *countp)
|
|
{
|
|
return (BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
|
|
startp, countp));
|
|
}
|
|
|
|
u_long
|
|
bus_get_resource_start(device_t dev, int type, int rid)
|
|
{
|
|
u_long start, count;
|
|
int error;
|
|
|
|
error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
|
|
&start, &count);
|
|
if (error)
|
|
return (0);
|
|
return (start);
|
|
}
|
|
|
|
u_long
|
|
bus_get_resource_count(device_t dev, int type, int rid)
|
|
{
|
|
u_long start, count;
|
|
int error;
|
|
|
|
error = BUS_GET_RESOURCE(device_get_parent(dev), dev, type, rid,
|
|
&start, &count);
|
|
if (error)
|
|
return (0);
|
|
return (count);
|
|
}
|
|
|
|
void
|
|
bus_delete_resource(device_t dev, int type, int rid)
|
|
{
|
|
BUS_DELETE_RESOURCE(device_get_parent(dev), dev, type, rid);
|
|
}
|
|
|
|
int
|
|
bus_child_present(device_t child)
|
|
{
|
|
return (BUS_CHILD_PRESENT(device_get_parent(child), child));
|
|
}
|
|
|
|
int
|
|
bus_child_pnpinfo_str(device_t child, char *buf, size_t buflen)
|
|
{
|
|
device_t parent;
|
|
|
|
parent = device_get_parent(child);
|
|
if (parent == NULL) {
|
|
*buf = '\0';
|
|
return (0);
|
|
}
|
|
return (BUS_CHILD_PNPINFO_STR(parent, child, buf, buflen));
|
|
}
|
|
|
|
int
|
|
bus_child_location_str(device_t child, char *buf, size_t buflen)
|
|
{
|
|
device_t parent;
|
|
|
|
parent = device_get_parent(child);
|
|
if (parent == NULL) {
|
|
*buf = '\0';
|
|
return (0);
|
|
}
|
|
return (BUS_CHILD_LOCATION_STR(parent, child, buf, buflen));
|
|
}
|
|
|
|
static int
|
|
root_print_child(device_t dev, device_t child)
|
|
{
|
|
int retval = 0;
|
|
|
|
retval += bus_print_child_header(dev, child);
|
|
retval += printf("\n");
|
|
|
|
return (retval);
|
|
}
|
|
|
|
static int
|
|
root_setup_intr(device_t dev, device_t child, driver_intr_t *intr, void *arg,
|
|
void **cookiep)
|
|
{
|
|
/*
|
|
* If an interrupt mapping gets to here something bad has happened.
|
|
*/
|
|
panic("root_setup_intr");
|
|
}
|
|
|
|
/*
|
|
* If we get here, assume that the device is permanant and really is
|
|
* present in the system. Removable bus drivers are expected to intercept
|
|
* this call long before it gets here. We return -1 so that drivers that
|
|
* really care can check vs -1 or some ERRNO returned higher in the food
|
|
* chain.
|
|
*/
|
|
static int
|
|
root_child_present(device_t dev, device_t child)
|
|
{
|
|
return (-1);
|
|
}
|
|
|
|
static kobj_method_t root_methods[] = {
|
|
/* Device interface */
|
|
KOBJMETHOD(device_shutdown, bus_generic_shutdown),
|
|
KOBJMETHOD(device_suspend, bus_generic_suspend),
|
|
KOBJMETHOD(device_resume, bus_generic_resume),
|
|
|
|
/* Bus interface */
|
|
KOBJMETHOD(bus_print_child, root_print_child),
|
|
KOBJMETHOD(bus_read_ivar, bus_generic_read_ivar),
|
|
KOBJMETHOD(bus_write_ivar, bus_generic_write_ivar),
|
|
KOBJMETHOD(bus_setup_intr, root_setup_intr),
|
|
KOBJMETHOD(bus_child_present, root_child_present),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t root_driver = {
|
|
"root",
|
|
root_methods,
|
|
1, /* no softc */
|
|
};
|
|
|
|
device_t root_bus;
|
|
devclass_t root_devclass;
|
|
|
|
static int
|
|
root_bus_module_handler(module_t mod, int what, void* arg)
|
|
{
|
|
switch (what) {
|
|
case MOD_LOAD:
|
|
TAILQ_INIT(&bus_data_devices);
|
|
kobj_class_compile((kobj_class_t) &root_driver);
|
|
root_bus = make_device(NULL, "root", 0);
|
|
root_bus->desc = "System root bus";
|
|
kobj_init((kobj_t) root_bus, (kobj_class_t) &root_driver);
|
|
root_bus->driver = &root_driver;
|
|
root_bus->state = DS_ATTACHED;
|
|
root_devclass = devclass_find_internal("root", FALSE);
|
|
devinit();
|
|
return (0);
|
|
|
|
case MOD_SHUTDOWN:
|
|
device_shutdown(root_bus);
|
|
return (0);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static moduledata_t root_bus_mod = {
|
|
"rootbus",
|
|
root_bus_module_handler,
|
|
0
|
|
};
|
|
DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
|
|
|
|
void
|
|
root_bus_configure(void)
|
|
{
|
|
device_t dev;
|
|
|
|
PDEBUG(("."));
|
|
|
|
TAILQ_FOREACH(dev, &root_bus->children, link) {
|
|
device_probe_and_attach(dev);
|
|
}
|
|
}
|
|
|
|
int
|
|
driver_module_handler(module_t mod, int what, void *arg)
|
|
{
|
|
int error, i;
|
|
struct driver_module_data *dmd;
|
|
devclass_t bus_devclass;
|
|
|
|
dmd = (struct driver_module_data *)arg;
|
|
bus_devclass = devclass_find_internal(dmd->dmd_busname, TRUE);
|
|
error = 0;
|
|
|
|
switch (what) {
|
|
case MOD_LOAD:
|
|
if (dmd->dmd_chainevh)
|
|
error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
|
|
|
|
for (i = 0; !error && i < dmd->dmd_ndrivers; i++) {
|
|
PDEBUG(("Loading module: driver %s on bus %s",
|
|
DRIVERNAME(dmd->dmd_drivers[i]), dmd->dmd_busname));
|
|
error = devclass_add_driver(bus_devclass,
|
|
dmd->dmd_drivers[i]);
|
|
}
|
|
if (error)
|
|
break;
|
|
|
|
/*
|
|
* The drivers loaded in this way are assumed to all
|
|
* implement the same devclass.
|
|
*/
|
|
*dmd->dmd_devclass =
|
|
devclass_find_internal(dmd->dmd_drivers[0]->name, TRUE);
|
|
break;
|
|
|
|
case MOD_UNLOAD:
|
|
for (i = 0; !error && i < dmd->dmd_ndrivers; i++) {
|
|
PDEBUG(("Unloading module: driver %s from bus %s",
|
|
DRIVERNAME(dmd->dmd_drivers[i]),
|
|
dmd->dmd_busname));
|
|
error = devclass_delete_driver(bus_devclass,
|
|
dmd->dmd_drivers[i]);
|
|
}
|
|
|
|
if (!error && dmd->dmd_chainevh)
|
|
error = dmd->dmd_chainevh(mod,what,dmd->dmd_chainarg);
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
#ifdef BUS_DEBUG
|
|
|
|
/* the _short versions avoid iteration by not calling anything that prints
|
|
* more than oneliners. I love oneliners.
|
|
*/
|
|
|
|
static void
|
|
print_device_short(device_t dev, int indent)
|
|
{
|
|
if (!dev)
|
|
return;
|
|
|
|
indentprintf(("device %d: <%s> %sparent,%schildren,%s%s%s%s,%sivars,%ssoftc,busy=%d\n",
|
|
dev->unit, dev->desc,
|
|
(dev->parent? "":"no "),
|
|
(TAILQ_EMPTY(&dev->children)? "no ":""),
|
|
(dev->flags&DF_ENABLED? "enabled,":"disabled,"),
|
|
(dev->flags&DF_FIXEDCLASS? "fixed,":""),
|
|
(dev->flags&DF_WILDCARD? "wildcard,":""),
|
|
(dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
|
|
(dev->ivars? "":"no "),
|
|
(dev->softc? "":"no "),
|
|
dev->busy));
|
|
}
|
|
|
|
static void
|
|
print_device(device_t dev, int indent)
|
|
{
|
|
if (!dev)
|
|
return;
|
|
|
|
print_device_short(dev, indent);
|
|
|
|
indentprintf(("Parent:\n"));
|
|
print_device_short(dev->parent, indent+1);
|
|
indentprintf(("Driver:\n"));
|
|
print_driver_short(dev->driver, indent+1);
|
|
indentprintf(("Devclass:\n"));
|
|
print_devclass_short(dev->devclass, indent+1);
|
|
}
|
|
|
|
void
|
|
print_device_tree_short(device_t dev, int indent)
|
|
/* print the device and all its children (indented) */
|
|
{
|
|
device_t child;
|
|
|
|
if (!dev)
|
|
return;
|
|
|
|
print_device_short(dev, indent);
|
|
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
print_device_tree_short(child, indent+1);
|
|
}
|
|
}
|
|
|
|
void
|
|
print_device_tree(device_t dev, int indent)
|
|
/* print the device and all its children (indented) */
|
|
{
|
|
device_t child;
|
|
|
|
if (!dev)
|
|
return;
|
|
|
|
print_device(dev, indent);
|
|
|
|
TAILQ_FOREACH(child, &dev->children, link) {
|
|
print_device_tree(child, indent+1);
|
|
}
|
|
}
|
|
|
|
static void
|
|
print_driver_short(driver_t *driver, int indent)
|
|
{
|
|
if (!driver)
|
|
return;
|
|
|
|
indentprintf(("driver %s: softc size = %zd\n",
|
|
driver->name, driver->size));
|
|
}
|
|
|
|
static void
|
|
print_driver(driver_t *driver, int indent)
|
|
{
|
|
if (!driver)
|
|
return;
|
|
|
|
print_driver_short(driver, indent);
|
|
}
|
|
|
|
|
|
static void
|
|
print_driver_list(driver_list_t drivers, int indent)
|
|
{
|
|
driverlink_t driver;
|
|
|
|
TAILQ_FOREACH(driver, &drivers, link) {
|
|
print_driver(driver->driver, indent);
|
|
}
|
|
}
|
|
|
|
static void
|
|
print_devclass_short(devclass_t dc, int indent)
|
|
{
|
|
if ( !dc )
|
|
return;
|
|
|
|
indentprintf(("devclass %s: max units = %d\n", dc->name, dc->maxunit));
|
|
}
|
|
|
|
static void
|
|
print_devclass(devclass_t dc, int indent)
|
|
{
|
|
int i;
|
|
|
|
if ( !dc )
|
|
return;
|
|
|
|
print_devclass_short(dc, indent);
|
|
indentprintf(("Drivers:\n"));
|
|
print_driver_list(dc->drivers, indent+1);
|
|
|
|
indentprintf(("Devices:\n"));
|
|
for (i = 0; i < dc->maxunit; i++)
|
|
if (dc->devices[i])
|
|
print_device(dc->devices[i], indent+1);
|
|
}
|
|
|
|
void
|
|
print_devclass_list_short(void)
|
|
{
|
|
devclass_t dc;
|
|
|
|
printf("Short listing of devclasses, drivers & devices:\n");
|
|
TAILQ_FOREACH(dc, &devclasses, link) {
|
|
print_devclass_short(dc, 0);
|
|
}
|
|
}
|
|
|
|
void
|
|
print_devclass_list(void)
|
|
{
|
|
devclass_t dc;
|
|
|
|
printf("Full listing of devclasses, drivers & devices:\n");
|
|
TAILQ_FOREACH(dc, &devclasses, link) {
|
|
print_devclass(dc, 0);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* User-space access to the device tree.
|
|
*
|
|
* We implement a small set of nodes:
|
|
*
|
|
* hw.bus Single integer read method to obtain the
|
|
* current generation count.
|
|
* hw.bus.devices Reads the entire device tree in flat space.
|
|
* hw.bus.rman Resource manager interface
|
|
*
|
|
* We might like to add the ability to scan devclasses and/or drivers to
|
|
* determine what else is currently loaded/available.
|
|
*/
|
|
|
|
static int
|
|
sysctl_bus(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct u_businfo ubus;
|
|
|
|
ubus.ub_version = BUS_USER_VERSION;
|
|
ubus.ub_generation = bus_data_generation;
|
|
|
|
return (SYSCTL_OUT(req, &ubus, sizeof(ubus)));
|
|
}
|
|
SYSCTL_NODE(_hw_bus, OID_AUTO, info, CTLFLAG_RW, sysctl_bus,
|
|
"bus-related data");
|
|
|
|
static int
|
|
sysctl_devices(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int *name = (int *)arg1;
|
|
u_int namelen = arg2;
|
|
int index;
|
|
struct device *dev;
|
|
struct u_device udev; /* XXX this is a bit big */
|
|
int error;
|
|
|
|
if (namelen != 2)
|
|
return (EINVAL);
|
|
|
|
if (bus_data_generation_check(name[0]))
|
|
return (EINVAL);
|
|
|
|
index = name[1];
|
|
|
|
/*
|
|
* Scan the list of devices, looking for the requested index.
|
|
*/
|
|
TAILQ_FOREACH(dev, &bus_data_devices, devlink) {
|
|
if (index-- == 0)
|
|
break;
|
|
}
|
|
if (dev == NULL)
|
|
return (ENOENT);
|
|
|
|
/*
|
|
* Populate the return array.
|
|
*/
|
|
udev.dv_handle = (uintptr_t)dev;
|
|
udev.dv_parent = (uintptr_t)dev->parent;
|
|
if (dev->nameunit == NULL)
|
|
udev.dv_name[0] = '\0';
|
|
else
|
|
strlcpy(udev.dv_name, dev->nameunit, sizeof(udev.dv_name));
|
|
|
|
if (dev->desc == NULL)
|
|
udev.dv_desc[0] = '\0';
|
|
else
|
|
strlcpy(udev.dv_desc, dev->desc, sizeof(udev.dv_desc));
|
|
if (dev->driver == NULL || dev->driver->name == NULL)
|
|
udev.dv_drivername[0] = '\0';
|
|
else
|
|
strlcpy(udev.dv_drivername, dev->driver->name,
|
|
sizeof(udev.dv_drivername));
|
|
udev.dv_pnpinfo[0] = '\0';
|
|
udev.dv_location[0] = '\0';
|
|
bus_child_pnpinfo_str(dev, udev.dv_pnpinfo, sizeof(udev.dv_pnpinfo));
|
|
bus_child_location_str(dev, udev.dv_location, sizeof(udev.dv_location));
|
|
udev.dv_devflags = dev->devflags;
|
|
udev.dv_flags = dev->flags;
|
|
udev.dv_state = dev->state;
|
|
error = SYSCTL_OUT(req, &udev, sizeof(udev));
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_NODE(_hw_bus, OID_AUTO, devices, CTLFLAG_RD, sysctl_devices,
|
|
"system device tree");
|
|
|
|
/*
|
|
* Sysctl interface for scanning the resource lists.
|
|
*
|
|
* We take two input parameters; the index into the list of resource
|
|
* managers, and the resource offset into the list.
|
|
*/
|
|
static int
|
|
sysctl_rman(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int *name = (int *)arg1;
|
|
u_int namelen = arg2;
|
|
int rman_idx, res_idx;
|
|
struct rman *rm;
|
|
struct resource *res;
|
|
struct u_rman urm;
|
|
struct u_resource ures;
|
|
int error;
|
|
|
|
if (namelen != 3)
|
|
return (EINVAL);
|
|
|
|
if (bus_data_generation_check(name[0]))
|
|
return (EINVAL);
|
|
rman_idx = name[1];
|
|
res_idx = name[2];
|
|
|
|
/*
|
|
* Find the indexed resource manager
|
|
*/
|
|
TAILQ_FOREACH(rm, &rman_head, rm_link) {
|
|
if (rman_idx-- == 0)
|
|
break;
|
|
}
|
|
if (rm == NULL)
|
|
return (ENOENT);
|
|
|
|
/*
|
|
* If the resource index is -1, we want details on the
|
|
* resource manager.
|
|
*/
|
|
if (res_idx == -1) {
|
|
urm.rm_handle = (uintptr_t)rm;
|
|
strlcpy(urm.rm_descr, rm->rm_descr, RM_TEXTLEN);
|
|
urm.rm_start = rm->rm_start;
|
|
urm.rm_size = rm->rm_end - rm->rm_start + 1;
|
|
urm.rm_type = rm->rm_type;
|
|
|
|
error = SYSCTL_OUT(req, &urm, sizeof(urm));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Find the indexed resource and return it.
|
|
*/
|
|
TAILQ_FOREACH(res, &rm->rm_list, r_link) {
|
|
if (res_idx-- == 0) {
|
|
ures.r_handle = (uintptr_t)res;
|
|
ures.r_parent = (uintptr_t)res->r_rm;
|
|
ures.r_device = (uintptr_t)res->r_dev;
|
|
if (res->r_dev != NULL) {
|
|
if (device_get_name(res->r_dev) != NULL) {
|
|
snprintf(ures.r_devname, RM_TEXTLEN,
|
|
"%s%d",
|
|
device_get_name(res->r_dev),
|
|
device_get_unit(res->r_dev));
|
|
} else {
|
|
strlcpy(ures.r_devname, "nomatch",
|
|
RM_TEXTLEN);
|
|
}
|
|
} else {
|
|
ures.r_devname[0] = '\0';
|
|
}
|
|
ures.r_start = res->r_start;
|
|
ures.r_size = res->r_end - res->r_start + 1;
|
|
ures.r_flags = res->r_flags;
|
|
|
|
error = SYSCTL_OUT(req, &ures, sizeof(ures));
|
|
return (error);
|
|
}
|
|
}
|
|
return (ENOENT);
|
|
}
|
|
|
|
SYSCTL_NODE(_hw_bus, OID_AUTO, rman, CTLFLAG_RD, sysctl_rman,
|
|
"kernel resource manager");
|
|
|
|
int
|
|
bus_data_generation_check(int generation)
|
|
{
|
|
if (generation != bus_data_generation)
|
|
return (1);
|
|
|
|
/* XXX generate optimised lists here? */
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
bus_data_generation_update(void)
|
|
{
|
|
bus_data_generation++;
|
|
}
|