d29516dd82
accesses softc after it is freed. Use a different malloc type for softc than the rest of the bus code to make it more clear when these things happen that it is the driver that's at fault, not the bus code. Suggested by: sam and/or phk (I think)
2669 lines
57 KiB
C
2669 lines
57 KiB
C
/*-
|
|
* 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
|
|
* are met:
|
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* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* 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
|
|
* 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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|
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#include "opt_bus.h"
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|
|
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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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|
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#include <machine/stdarg.h>
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|
|
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#include <vm/uma.h>
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|
|
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SYSCTL_NODE(_hw, OID_AUTO, bus, CTLFLAG_RW, NULL, NULL);
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|
|
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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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|
|
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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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|
|
|
/*
|
|
* Implementation of device.
|
|
*/
|
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struct device {
|
|
/*
|
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* A device is a kernel object. The first field must be the
|
|
* current ops table for the object.
|
|
*/
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|
KOBJ_FIELDS;
|
|
|
|
/*
|
|
* Device hierarchy.
|
|
*/
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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;
|
|
device_list_t children; /* list of subordinate devices */
|
|
|
|
/*
|
|
* Details of this device.
|
|
*/
|
|
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 */
|
|
#define DF_WILDCARD 4 /* unit was originally wildcard */
|
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#define DF_DESCMALLOCED 8 /* description was malloced */
|
|
#define DF_QUIET 16 /* don't print verbose attach message */
|
|
#define DF_DONENOMATCH 32 /* don't execute DEVICE_NOMATCH again */
|
|
#define DF_EXTERNALSOFTC 64 /* softc not allocated by us */
|
|
u_char order; /* order from device_add_child_ordered() */
|
|
u_char pad;
|
|
void *ivars;
|
|
void *softc;
|
|
};
|
|
|
|
struct device_op_desc {
|
|
unsigned int offset; /* offset in driver ops */
|
|
struct method* method; /* internal method implementation */
|
|
devop_t deflt; /* default implementation */
|
|
const char* name; /* unique name (for registration) */
|
|
};
|
|
|
|
static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");
|
|
static MALLOC_DEFINE(M_BUS_SC, "bus-sc", "Bus data structures, softc");
|
|
|
|
#ifdef BUS_DEBUG
|
|
|
|
static int bus_debug = 1;
|
|
TUNABLE_INT("bus.debug", &bus_debug);
|
|
SYSCTL_INT(_debug, OID_AUTO, bus_debug, CTLFLAG_RW, &bus_debug, 0,
|
|
"Debug bus code");
|
|
|
|
#define PDEBUG(a) if (bus_debug) {printf("%s:%d: ", __func__, __LINE__), printf a; printf("\n");}
|
|
#define DEVICENAME(d) ((d)? device_get_name(d): "no device")
|
|
#define DRIVERNAME(d) ((d)? d->name : "no driver")
|
|
#define DEVCLANAME(d) ((d)? d->name : "no devclass")
|
|
|
|
/* Produce the indenting, indent*2 spaces plus a '.' ahead of that to
|
|
* prevent syslog from deleting initial spaces
|
|
*/
|
|
#define indentprintf(p) do { int iJ; printf("."); for (iJ=0; iJ<indent; iJ++) printf(" "); printf p ; } while (0)
|
|
|
|
static void print_device_short(device_t dev, int indent);
|
|
static void print_device(device_t dev, int indent);
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|
void print_device_tree_short(device_t dev, int indent);
|
|
void print_device_tree(device_t dev, int indent);
|
|
static void print_driver_short(driver_t *driver, int indent);
|
|
static void print_driver(driver_t *driver, int indent);
|
|
static void print_driver_list(driver_list_t drivers, int indent);
|
|
static void print_devclass_short(devclass_t dc, int indent);
|
|
static void print_devclass(devclass_t dc, int indent);
|
|
void print_devclass_list_short(void);
|
|
void print_devclass_list(void);
|
|
|
|
#else
|
|
/* Make the compiler ignore the function calls */
|
|
#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 */
|
|
|
|
#define print_device_short(d,i) /* nop */
|
|
#define print_device(d,i) /* nop */
|
|
#define print_device_tree_short(d,i) /* nop */
|
|
#define print_device_tree(d,i) /* nop */
|
|
#define print_driver_short(d,i) /* nop */
|
|
#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 */
|
|
#define print_devclass_list() /* nop */
|
|
#endif
|
|
|
|
/*
|
|
* /dev/devctl implementation
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|
*/
|
|
|
|
/*
|
|
* This design allows only one reader for /dev/devctl. This is not desirable
|
|
* 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
|
|
* 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;
|
|
static d_close_t devclose;
|
|
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,
|
|
.d_read = devread,
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|
.d_ioctl = devioctl,
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|
.d_poll = devpoll,
|
|
.d_name = "devctl",
|
|
.d_maj = CDEV_MAJOR,
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|
};
|
|
|
|
struct dev_event_info
|
|
{
|
|
char *dei_data;
|
|
TAILQ_ENTRY(dev_event_info) dei_link;
|
|
};
|
|
|
|
TAILQ_HEAD(devq, dev_event_info);
|
|
|
|
static struct dev_softc
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|
{
|
|
int inuse;
|
|
int nonblock;
|
|
struct mtx mtx;
|
|
struct cv cv;
|
|
struct selinfo sel;
|
|
struct devq devq;
|
|
struct proc *async_proc;
|
|
} devsoftc;
|
|
|
|
static dev_t devctl_dev;
|
|
|
|
static void
|
|
devinit(void)
|
|
{
|
|
devctl_dev = make_dev(&dev_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
|
|
"devctl");
|
|
mtx_init(&devsoftc.mtx, "dev mtx", "devd", MTX_DEF);
|
|
cv_init(&devsoftc.cv, "dev cv");
|
|
TAILQ_INIT(&devsoftc.devq);
|
|
}
|
|
|
|
static int
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devopen(dev_t dev, int oflags, int devtype, d_thread_t *td)
|
|
{
|
|
if (devsoftc.inuse)
|
|
return (EBUSY);
|
|
/* move to init */
|
|
devsoftc.inuse = 1;
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|
devsoftc.nonblock = 0;
|
|
devsoftc.async_proc = NULL;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
devclose(dev_t dev, int fflag, int devtype, d_thread_t *td)
|
|
{
|
|
devsoftc.inuse = 0;
|
|
mtx_lock(&devsoftc.mtx);
|
|
cv_broadcast(&devsoftc.cv);
|
|
mtx_unlock(&devsoftc.mtx);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The read channel for this device is used to report changes to
|
|
* userland in realtime. We are required to free the data as well as
|
|
* the n1 object because we allocate them separately. Also note that
|
|
* we return one record at a time. If you try to read this device a
|
|
* character at a time, you will loose the rest of the data. Listening
|
|
* programs are expected to cope.
|
|
*/
|
|
static int
|
|
devread(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
struct dev_event_info *n1;
|
|
int rv;
|
|
|
|
mtx_lock(&devsoftc.mtx);
|
|
while (TAILQ_EMPTY(&devsoftc.devq)) {
|
|
if (devsoftc.nonblock) {
|
|
mtx_unlock(&devsoftc.mtx);
|
|
return (EAGAIN);
|
|
}
|
|
rv = cv_wait_sig(&devsoftc.cv, &devsoftc.mtx);
|
|
if (rv) {
|
|
/*
|
|
* Need to translate ERESTART to EINTR here? -- jake
|
|
*/
|
|
mtx_unlock(&devsoftc.mtx);
|
|
return (rv);
|
|
}
|
|
}
|
|
n1 = TAILQ_FIRST(&devsoftc.devq);
|
|
TAILQ_REMOVE(&devsoftc.devq, n1, dei_link);
|
|
mtx_unlock(&devsoftc.mtx);
|
|
rv = uiomove(n1->dei_data, strlen(n1->dei_data), uio);
|
|
free(n1->dei_data, M_BUS);
|
|
free(n1, M_BUS);
|
|
return (rv);
|
|
}
|
|
|
|
static int
|
|
devioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, d_thread_t *td)
|
|
{
|
|
switch (cmd) {
|
|
|
|
case FIONBIO:
|
|
if (*(int*)data)
|
|
devsoftc.nonblock = 1;
|
|
else
|
|
devsoftc.nonblock = 0;
|
|
return (0);
|
|
case FIOASYNC:
|
|
if (*(int*)data)
|
|
devsoftc.async_proc = td->td_proc;
|
|
else
|
|
devsoftc.async_proc = NULL;
|
|
return (0);
|
|
|
|
/* (un)Support for other fcntl() calls. */
|
|
case FIOCLEX:
|
|
case FIONCLEX:
|
|
case FIONREAD:
|
|
case FIOSETOWN:
|
|
case FIOGETOWN:
|
|
default:
|
|
break;
|
|
}
|
|
return (ENOTTY);
|
|
}
|
|
|
|
static int
|
|
devpoll(dev_t dev, int events, d_thread_t *td)
|
|
{
|
|
int revents = 0;
|
|
|
|
mtx_lock(&devsoftc.mtx);
|
|
if (events & (POLLIN | POLLRDNORM)) {
|
|
if (!TAILQ_EMPTY(&devsoftc.devq))
|
|
revents = events & (POLLIN | POLLRDNORM);
|
|
else
|
|
selrecord(td, &devsoftc.sel);
|
|
}
|
|
mtx_unlock(&devsoftc.mtx);
|
|
|
|
return (revents);
|
|
}
|
|
|
|
/*
|
|
* Common routine that tries to make sending messages as easy as possible.
|
|
* We allocate memory for the data, copy strings into that, but do not
|
|
* free it unless there's an error. The dequeue part of the driver should
|
|
* free the data. We don't send data when the device is disabled. We do
|
|
* send data, even when we have no listeners, because we wish to avoid
|
|
* races relating to startup and restart of listening applications.
|
|
*/
|
|
static void
|
|
devaddq(const char *type, const char *what, device_t dev)
|
|
{
|
|
struct dev_event_info *n1 = NULL;
|
|
struct proc *p;
|
|
char *data = NULL;
|
|
char *loc;
|
|
const char *parstr;
|
|
|
|
if (devctl_disable)
|
|
return;
|
|
n1 = malloc(sizeof(*n1), M_BUS, M_NOWAIT);
|
|
if (n1 == NULL)
|
|
goto bad;
|
|
data = malloc(1024, M_BUS, M_NOWAIT);
|
|
if (data == NULL)
|
|
goto bad;
|
|
loc = malloc(1024, M_BUS, M_NOWAIT);
|
|
if (loc == NULL)
|
|
goto bad;
|
|
*loc = '\0';
|
|
bus_child_location_str(dev, loc, 1024);
|
|
if (device_get_parent(dev) == NULL)
|
|
parstr = "."; /* Or '/' ? */
|
|
else
|
|
parstr = device_get_nameunit(device_get_parent(dev));
|
|
snprintf(data, 1024, "%s%s at %s on %s\n", type, what, loc, parstr);
|
|
free(loc, M_BUS);
|
|
n1->dei_data = data;
|
|
mtx_lock(&devsoftc.mtx);
|
|
TAILQ_INSERT_TAIL(&devsoftc.devq, n1, dei_link);
|
|
cv_broadcast(&devsoftc.cv);
|
|
mtx_unlock(&devsoftc.mtx);
|
|
selwakeup(&devsoftc.sel);
|
|
p = devsoftc.async_proc;
|
|
if (p != NULL) {
|
|
PROC_LOCK(p);
|
|
psignal(p, SIGIO);
|
|
PROC_UNLOCK(p);
|
|
}
|
|
return;
|
|
bad:;
|
|
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
|
|
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_SC);
|
|
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_SC);
|
|
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_SC,
|
|
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_config_intr(device_t dev, int irq, enum intr_trigger trig,
|
|
enum intr_polarity pol)
|
|
{
|
|
|
|
/* Propagate up the bus hierarchy until someone handles it. */
|
|
if (dev->parent)
|
|
return (BUS_CONFIG_INTR(dev->parent, irq, trig, pol));
|
|
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++;
|
|
}
|