Differential D46605 Diff 145039 sys/kern/subr_bus.c

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sys/kern/subr_bus.c

Show First 20 Lines • Show All 99 Lines • ▼ Show 20 Lines	struct devclass {
int maxunit; /* size of devices array */		int maxunit; /* size of devices array */
int flags;		int flags;
#define DC_HAS_CHILDREN 1		#define DC_HAS_CHILDREN 1

struct sysctl_ctx_list sysctl_ctx;		struct sysctl_ctx_list sysctl_ctx;
struct sysctl_oid *sysctl_tree;		struct sysctl_oid *sysctl_tree;
};		};

		struct device_prop_elm {
		const char *name;
		void *val;
		void *dtr_ctx;
		device_prop_dtr_t dtr;
		LIST_ENTRY(device_prop_elm) link;
		};

		static void device_destroy_props(device_t dev);

/**		/**
* @brief Implementation of _device.		* @brief Implementation of _device.
*		*
* The structure is named "_device" instead of "device" to avoid type confusion		* The structure is named "_device" instead of "device" to avoid type confusion
* caused by other subsystems defining a (struct device).		* caused by other subsystems defining a (struct device).
*/		*/
struct _device {		struct _device {
/*		/*
Show All 20 Lines	struct _device {
char* desc; /*< driver specific description /		char* desc; /*< driver specific description /
u_int busy; /*< count of calls to device_busy() /		u_int busy; /*< count of calls to device_busy() /
device_state_t state; /*< current device state /		device_state_t state; /*< current device state /
uint32_t devflags; /*< api level flags for device_get_flags() /		uint32_t devflags; /*< api level flags for device_get_flags() /
u_int flags; /*< internal device flags /		u_int flags; /*< internal device flags /
u_int order; /*< order from device_add_child_ordered() /		u_int order; /*< order from device_add_child_ordered() /
void ivars; /< instance variables /		void ivars; /< instance variables /
void softc; /< current driver's variables /		void softc; /< current driver's variables /
		LIST_HEAD(, device_prop_elm) props;

struct sysctl_ctx_list sysctl_ctx; /*< state for sysctl variables /		struct sysctl_ctx_list sysctl_ctx; /*< state for sysctl variables /
struct sysctl_oid sysctl_tree; /< state for sysctl variables /		struct sysctl_oid sysctl_tree; /< state for sysctl variables /
};		};

static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");		static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");
static MALLOC_DEFINE(M_BUS_SC, "bus-sc", "Bus data structures, softc");		static MALLOC_DEFINE(M_BUS_SC, "bus-sc", "Bus data structures, softc");

▲ Show 20 Lines • Show All 1,192 Lines • ▼ Show 20 Lines	if (devclass_add_device(dc, dev)) {
kobj_delete((kobj_t) dev, M_BUS);		kobj_delete((kobj_t) dev, M_BUS);
return (NULL);		return (NULL);
}		}
}		}
if (parent != NULL && device_has_quiet_children(parent))		if (parent != NULL && device_has_quiet_children(parent))
dev->flags \|= DF_QUIET \| DF_QUIET_CHILDREN;		dev->flags \|= DF_QUIET \| DF_QUIET_CHILDREN;
dev->ivars = NULL;		dev->ivars = NULL;
dev->softc = NULL;		dev->softc = NULL;
		LIST_INIT(&dev->props);

dev->state = DS_NOTPRESENT;		dev->state = DS_NOTPRESENT;

TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink);		TAILQ_INSERT_TAIL(&bus_data_devices, dev, devlink);
bus_data_generation_update();		bus_data_generation_update();

return (dev);		return (dev);
}		}
▲ Show 20 Lines • Show All 126 Lines • ▼ Show 20 Lines	device_delete_child(device_t dev, device_t child)

/* Delete any grandchildren left after detach. */		/* Delete any grandchildren left after detach. */
while ((grandchild = TAILQ_FIRST(&child->children)) != NULL) {		while ((grandchild = TAILQ_FIRST(&child->children)) != NULL) {
error = device_delete_child(child, grandchild);		error = device_delete_child(child, grandchild);
if (error)		if (error)
return (error);		return (error);
}		}

		device_destroy_props(dev);
if (child->devclass)		if (child->devclass)
devclass_delete_device(child->devclass, child);		devclass_delete_device(child->devclass, child);
if (child->parent)		if (child->parent)
BUS_CHILD_DELETED(dev, child);		BUS_CHILD_DELETED(dev, child);
TAILQ_REMOVE(&dev->children, child, link);		TAILQ_REMOVE(&dev->children, child, link);
TAILQ_REMOVE(&bus_data_devices, child, devlink);		TAILQ_REMOVE(&bus_data_devices, child, devlink);
kobj_delete((kobj_t) child, M_BUS);		kobj_delete((kobj_t) child, M_BUS);

▲ Show 20 Lines • Show All 4,506 Lines • ▼ Show 20 Lines	if (sb != NULL) {
}		}
sbuf_delete(sb);		sbuf_delete(sb);
}		}
}		}
if (error != 0 \|\| res == NULL \|\| res->dln_path == NULL)		if (error != 0 \|\| res == NULL \|\| res->dln_path == NULL)
return (false);		return (false);

return (strcmp(res->dln_path, cp) == 0);		return (strcmp(res->dln_path, cp) == 0);
		}

		static struct device_prop_elm *
		device_prop_find(device_t dev, const char *name)
		{
		struct device_prop_elm *e;

		bus_topo_assert();

		LIST_FOREACH(e, &dev->props, link) {
		if (strcmp(name, e->name) == 0)
		return (e);
		}
		return (NULL);
		}

		int
		device_set_prop(device_t dev, const char name, void val,
		device_prop_dtr_t dtr, void *dtr_ctx)
		{
		struct device_prop_elm e, e1;

		bus_topo_assert();

		e = device_prop_find(dev, name);
		if (e != NULL)
		goto found;

		e1 = malloc(sizeof(*e), M_BUS, M_WAITOK);
		e = device_prop_find(dev, name);
		if (e != NULL) {
		free(e1, M_BUS);
		goto found;
		}

		e1->name = name;
		e1->val = val;
		e1->dtr = dtr;
		e1->dtr_ctx = dtr_ctx;
		LIST_INSERT_HEAD(&dev->props, e1, link);
		return (0);

		found:
		LIST_REMOVE(e, link);
		if (e->dtr != NULL)
		e->dtr(dev, name, e->val, e->dtr_ctx);
		e->val = val;
		e->dtr = dtr;
		e->dtr_ctx = dtr_ctx;
		LIST_INSERT_HEAD(&dev->props, e, link);
		return (EEXIST);
		}

		int
		device_get_prop(device_t dev, const char name, void *valp)
		{
		struct device_prop_elm *e;

		bus_topo_assert();

		e = device_prop_find(dev, name);
		if (e == NULL)
		return (ENOENT);
		*valp = e->val;
		return (0);
		}

		int
		device_clear_prop(device_t dev, const char *name)
		{
		struct device_prop_elm *e;

		bus_topo_assert();

		e = device_prop_find(dev, name);
		if (e == NULL)
		return (ENOENT);
		LIST_REMOVE(e, link);
		if (e->dtr != NULL)
		e->dtr(dev, e->name, e->val, e->dtr_ctx);
		free(e, M_BUS);
		return (0);
		}

		static void
		device_destroy_props(device_t dev)
		{
		struct device_prop_elm *e;

		bus_topo_assert();

		while ((e = LIST_FIRST(&dev->props)) != NULL) {
		LIST_REMOVE_HEAD(&dev->props, link);
		if (e->dtr != NULL)
		e->dtr(dev, e->name, e->val, e->dtr_ctx);
		free(e, M_BUS);
		}
		}

		void
		device_clear_prop_alldev(const char *name)
		{
		device_t dev;

		TAILQ_FOREACH(dev, &bus_data_devices, devlink) {
		device_clear_prop(dev, name);
		}
}		}

/*		/*
* APIs to manage deprecation and obsolescence.		* APIs to manage deprecation and obsolescence.
*/		*/
static int obsolete_panic = 0;		static int obsolete_panic = 0;
SYSCTL_INT(_debug, OID_AUTO, obsolete_panic, CTLFLAG_RWTUN, &obsolete_panic, 0,		SYSCTL_INT(_debug, OID_AUTO, obsolete_panic, CTLFLAG_RWTUN, &obsolete_panic, 0,
"Panic when obsolete features are used (0 = never, 1 = if obsolete, "		"Panic when obsolete features are used (0 = never, 1 = if obsolete, "
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