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#ifndef _LINUX_CPUSET_H
#define _LINUX_CPUSET_H
/*
 *  cpuset interface
 *
 *  Copyright (C) 2003 BULL SA
 *  Copyright (C) 2004-2006 Silicon Graphics, Inc.
 *
 */

#include <linux/sched.h>
#include <linux/cpumask.h>
#include <linux/nodemask.h>
#include <linux/cgroup.h>
#include <linux/mm.h>

#ifdef CONFIG_CPUSETS

extern int number_of_cpusets;	/* How many cpusets are defined in system? */

extern int cpuset_init(void);
extern void cpuset_init_smp(void);
extern void cpuset_update_active_cpus(void);
extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
extern int cpuset_cpus_allowed_fallback(struct task_struct *p);
extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
#define cpuset_current_mems_allowed (current->mems_allowed)
void cpuset_init_current_mems_allowed(void);
int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);

extern int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask);
extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask);

static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
{
	return number_of_cpusets <= 1 ||
		__cpuset_node_allowed_softwall(node, gfp_mask);
}

static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
{
	return number_of_cpusets <= 1 ||
		__cpuset_node_allowed_hardwall(node, gfp_mask);
}

static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
{
	return cpuset_node_allowed_softwall(zone_to_nid(z), gfp_mask);
}

static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
{
	return cpuset_node_allowed_hardwall(zone_to_nid(z), gfp_mask);
}

extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
					  const struct task_struct *tsk2);

#define cpuset_memory_pressure_bump() 				\
	do {							\
		if (cpuset_memory_pressure_enabled)		\
			__cpuset_memory_pressure_bump();	\
	} while (0)
extern int cpuset_memory_pressure_enabled;
extern void __cpuset_memory_pressure_bump(void);

extern const struct file_operations proc_cpuset_operations;
struct seq_file;
extern void cpuset_task_status_allowed(struct seq_file *m,
					struct task_struct *task);

extern int cpuset_mem_spread_node(void);
extern int cpuset_slab_spread_node(void);

static inline int cpuset_do_page_mem_spread(void)
{
	return current->flags & PF_SPREAD_PAGE;
}

static inline int cpuset_do_slab_mem_spread(void)
{
	return current->flags & PF_SPREAD_SLAB;
}

extern int current_cpuset_is_being_rebound(void);

extern void rebuild_sched_domains(void);

extern void cpuset_print_task_mems_allowed(struct task_struct *p);

/*
 * reading current mems_allowed and mempolicy in the fastpath must protected
 * by get_mems_allowed()
 */
static inline void get_mems_allowed(void)
{
	current->mems_allowed_change_disable++;

	/*
	 * ensure that reading mems_allowed and mempolicy happens after the
	 * update of ->mems_allowed_change_disable.
	 *
	 * the write-side task finds ->mems_allowed_change_disable is not 0,
	 * and knows the read-side task is reading mems_allowed or mempolicy,
	 * so it will clear old bits lazily.
	 */
	smp_mb();
}

static inline void put_mems_allowed(void)
{
	/*
	 * ensure that reading mems_allowed and mempolicy before reducing
	 * mems_allowed_change_disable.
	 *
	 * the write-side task will know that the read-side task is still
	 * reading mems_allowed or mempolicy, don't clears old bits in the
	 * nodemask.
	 */
	smp_mb();
	--ACCESS_ONCE(current->mems_allowed_change_disable);
}

static inline void set_mems_allowed(nodemask_t nodemask)
{
	task_lock(current);
	current->mems_allowed = nodemask;
	task_unlock(current);
}

#else /* !CONFIG_CPUSETS */

static inline int cpuset_init(void) { return 0; }
static inline void cpuset_init_smp(void) {}

static inline void cpuset_update_active_cpus(void)
{
	partition_sched_domains(1, NULL, NULL);
}

static inline void cpuset_cpus_allowed(struct task_struct *p,
				       struct cpumask *mask)
{
	cpumask_copy(mask, cpu_possible_mask);
}

static inline int cpuset_cpus_allowed_fallback(struct task_struct *p)
{
	do_set_cpus_allowed(p, cpu_possible_mask);
	return cpumask_any(cpu_active_mask);
}

static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
{
	return node_possible_map;
}

#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
static inline void cpuset_init_current_mems_allowed(void) {}

static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
{
	return 1;
}

static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
{
	return 1;
}

static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
{
	return 1;
}

static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
{
	return 1;
}

static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
{
	return 1;
}

static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
						 const struct task_struct *tsk2)
{
	return 1;
}

static inline void cpuset_memory_pressure_bump(void) {}

static inline void cpuset_task_status_allowed(struct seq_file *m,
						struct task_struct *task)
{
}

static inline int cpuset_mem_spread_node(void)
{
	return 0;
}

static inline int cpuset_slab_spread_node(void)
{
	return 0;
}

static inline int cpuset_do_page_mem_spread(void)
{
	return 0;
}

static inline int cpuset_do_slab_mem_spread(void)
{
	return 0;
}

static inline int current_cpuset_is_being_rebound(void)
{
	return 0;
}

static inline void rebuild_sched_domains(void)
{
	partition_sched_domains(1, NULL, NULL);
}

static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
{
}

static inline void set_mems_allowed(nodemask_t nodemask)
{
}

static inline void get_mems_allowed(void)
{
}

static inline void put_mems_allowed(void)
{
}

#endif /* !CONFIG_CPUSETS */

#endif /* _LINUX_CPUSET_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-21 00:51:10 -0400
event handler (callback) */ int uwb_notifs_deregister(struct uwb_rc *rc, struct uwb_notifs_handler *entry) { if (mutex_lock_interruptible(&rc->notifs_chain.mutex)) return -ERESTARTSYS; list_del(&entry->list_node); mutex_unlock(&rc->notifs_chain.mutex); return 0; } EXPORT_SYMBOL_GPL(uwb_notifs_deregister); /* * Notify all event handlers of a given event on @rc * * We are called with a valid reference to the device, or NULL if the * event is not for a particular event (e.g., a BG join event). */ void uwb_notify(struct uwb_rc *rc, struct uwb_dev *uwb_dev, enum uwb_notifs event) { struct uwb_notifs_handler *handler; if (mutex_lock_interruptible(&rc->notifs_chain.mutex)) return; if (!list_empty(&rc->notifs_chain.list)) { list_for_each_entry(handler, &rc->notifs_chain.list, list_node) { handler->cb(handler->data, uwb_dev, event); } } mutex_unlock(&rc->notifs_chain.mutex); } /* * Release the backing device of a uwb_dev that has been dynamically allocated. */ static void uwb_dev_sys_release(struct device *dev) { struct uwb_dev *uwb_dev = to_uwb_dev(dev); uwb_bce_put(uwb_dev->bce); memset(uwb_dev, 0x69, sizeof(*uwb_dev)); kfree(uwb_dev); } /* * Initialize a UWB device instance * * Alloc, zero and call this function. */ void uwb_dev_init(struct uwb_dev *uwb_dev) { mutex_init(&uwb_dev->mutex); device_initialize(&uwb_dev->dev); uwb_dev->dev.release = uwb_dev_sys_release; uwb_dev_addr_init(&uwb_dev->dev_addr); uwb_mac_addr_init(&uwb_dev->mac_addr); bitmap_fill(uwb_dev->streams, UWB_NUM_GLOBAL_STREAMS); } static ssize_t uwb_dev_EUI_48_show(struct device *dev, struct device_attribute *attr, char *buf) { struct uwb_dev *uwb_dev = to_uwb_dev(dev); char addr[UWB_ADDR_STRSIZE]; uwb_mac_addr_print(addr, sizeof(addr), &uwb_dev->mac_addr); return sprintf(buf, "%s\n", addr); } static DEVICE_ATTR(EUI_48, S_IRUGO, uwb_dev_EUI_48_show, NULL); static ssize_t uwb_dev_DevAddr_show(struct device *dev, struct device_attribute *attr, char *buf) { struct uwb_dev *uwb_dev = to_uwb_dev(dev); char addr[UWB_ADDR_STRSIZE]; uwb_dev_addr_print(addr, sizeof(addr), &uwb_dev->dev_addr); return sprintf(buf, "%s\n", addr); } static DEVICE_ATTR(DevAddr, S_IRUGO, uwb_dev_DevAddr_show, NULL); /* * Show the BPST of this device. * * Calculated from the receive time of the device's beacon and it's * slot number. */ static ssize_t uwb_dev_BPST_show(struct device *dev, struct device_attribute *attr, char *buf) { struct uwb_dev *uwb_dev = to_uwb_dev(dev); struct uwb_beca_e *bce; struct uwb_beacon_frame *bf; u16 bpst; bce = uwb_dev->bce; mutex_lock(&bce->mutex); bf = (struct uwb_beacon_frame *)bce->be->BeaconInfo; bpst = bce->be->wBPSTOffset - (u16)(bf->Beacon_Slot_Number * UWB_BEACON_SLOT_LENGTH_US); mutex_unlock(&bce->mutex); return sprintf(buf, "%d\n", bpst); } static DEVICE_ATTR(BPST, S_IRUGO, uwb_dev_BPST_show, NULL); /* * Show the IEs a device is beaconing * * We need to access the beacon cache, so we just lock it really * quick, print the IEs and unlock. * * We have a reference on the cache entry, so that should be * quite safe. */ static ssize_t uwb_dev_IEs_show(struct device *dev, struct device_attribute *attr, char *buf) { struct uwb_dev *uwb_dev = to_uwb_dev(dev); return uwb_bce_print_IEs(uwb_dev, uwb_dev->bce, buf, PAGE_SIZE); } static DEVICE_ATTR(IEs, S_IRUGO | S_IWUSR, uwb_dev_IEs_show, NULL); static ssize_t uwb_dev_LQE_show(struct device *dev, struct device_attribute *attr, char *buf) { struct uwb_dev *uwb_dev = to_uwb_dev(dev); struct uwb_beca_e *bce = uwb_dev->bce; size_t result; mutex_lock(&bce->mutex); result = stats_show(&uwb_dev->bce->lqe_stats, buf); mutex_unlock(&bce->mutex); return result; } static ssize_t uwb_dev_LQE_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct uwb_dev *uwb_dev = to_uwb_dev(dev); struct uwb_beca_e *bce = uwb_dev->bce; ssize_t result; mutex_lock(&bce->mutex); result = stats_store(&uwb_dev->bce->lqe_stats, buf, size); mutex_unlock(&bce->mutex); return result; } static DEVICE_ATTR(LQE, S_IRUGO | S_IWUSR, uwb_dev_LQE_show, uwb_dev_LQE_store); static ssize_t uwb_dev_RSSI_show(struct device *dev, struct device_attribute *attr, char *buf) { struct uwb_dev *uwb_dev = to_uwb_dev(dev); struct uwb_beca_e *bce = uwb_dev->bce; size_t result; mutex_lock(&bce->mutex); result = stats_show(&uwb_dev->bce->rssi_stats, buf); mutex_unlock(&bce->mutex); return result; } static ssize_t uwb_dev_RSSI_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct uwb_dev *uwb_dev = to_uwb_dev(dev); struct uwb_beca_e *bce = uwb_dev->bce; ssize_t result; mutex_lock(&bce->mutex); result = stats_store(&uwb_dev->bce->rssi_stats, buf, size); mutex_unlock(&bce->mutex); return result; } static DEVICE_ATTR(RSSI, S_IRUGO | S_IWUSR, uwb_dev_RSSI_show, uwb_dev_RSSI_store); static struct attribute *dev_attrs[] = { &dev_attr_EUI_48.attr, &dev_attr_DevAddr.attr, &dev_attr_BPST.attr, &dev_attr_IEs.attr, &dev_attr_LQE.attr, &dev_attr_RSSI.attr, NULL, }; static struct attribute_group dev_attr_group = { .attrs = dev_attrs, }; static const struct attribute_group *groups[] = { &dev_attr_group, NULL, }; /** * Device SYSFS registration * * */ static int __uwb_dev_sys_add(struct uwb_dev *uwb_dev, struct device *parent_dev) { struct device *dev; dev = &uwb_dev->dev; /* Device sysfs files are only useful for neighbor devices not local radio controllers. */ if (&uwb_dev->rc->uwb_dev != uwb_dev) dev->groups = groups; dev->parent = parent_dev; dev_set_drvdata(dev, uwb_dev); return device_add(dev); } static void __uwb_dev_sys_rm(struct uwb_dev *uwb_dev) { dev_set_drvdata(&uwb_dev->dev, NULL); device_del(&uwb_dev->dev); } /** * Register and initialize a new UWB device * * Did you call uwb_dev_init() on it? * * @parent_rc: is the parent radio controller who has the link to the * device. When registering the UWB device that is a UWB * Radio Controller, we point back to it. * * If registering the device that is part of a radio, caller has set * rc->uwb_dev->dev. Otherwise it is to be left NULL--a new one will * be allocated. */ int uwb_dev_add(struct uwb_dev *uwb_dev, struct device *parent_dev, struct uwb_rc *parent_rc) { int result; struct device *dev; BUG_ON(uwb_dev == NULL); BUG_ON(parent_dev == NULL); BUG_ON(parent_rc == NULL); mutex_lock(&uwb_dev->mutex); dev = &uwb_dev->dev; uwb_dev->rc = parent_rc; result = __uwb_dev_sys_add(uwb_dev, parent_dev); if (result < 0) printk(KERN_ERR "UWB: unable to register dev %s with sysfs: %d\n", dev_name(dev), result); mutex_unlock(&uwb_dev->mutex); return result; } void uwb_dev_rm(struct uwb_dev *uwb_dev) { mutex_lock(&uwb_dev->mutex); __uwb_dev_sys_rm(uwb_dev); mutex_unlock(&uwb_dev->mutex); } static int __uwb_dev_try_get(struct device *dev, void *__target_uwb_dev) { struct uwb_dev *target_uwb_dev = __target_uwb_dev; struct uwb_dev *uwb_dev = to_uwb_dev(dev); if (uwb_dev == target_uwb_dev) { uwb_dev_get(uwb_dev); return 1; } else return 0; } /** * Given a UWB device descriptor, validate and refcount it * * @returns NULL if the device does not exist or is quiescing; the ptr to * it otherwise. */ struct uwb_dev *uwb_dev_try_get(struct uwb_rc *rc, struct uwb_dev *uwb_dev) { if (uwb_dev_for_each(rc, __uwb_dev_try_get, uwb_dev)) return uwb_dev; else return NULL; } EXPORT_SYMBOL_GPL(uwb_dev_try_get); /** * Remove a device from the system [grunt for other functions] */ int __uwb_dev_offair(struct uwb_dev *uwb_dev, struct uwb_rc *rc) { struct device *dev = &uwb_dev->dev; char macbuf[UWB_ADDR_STRSIZE], devbuf[UWB_ADDR_STRSIZE]; uwb_mac_addr_print(macbuf, sizeof(macbuf), &uwb_dev->mac_addr); uwb_dev_addr_print(devbuf, sizeof(devbuf), &uwb_dev->dev_addr); dev_info(dev, "uwb device (mac %s dev %s) disconnected from %s %s\n", macbuf, devbuf, rc ? rc->uwb_dev.dev.parent->bus->name : "n/a", rc ? dev_name(rc->uwb_dev.dev.parent) : ""); uwb_dev_rm(uwb_dev); list_del(&uwb_dev->bce->node); uwb_bce_put(uwb_dev->bce); uwb_dev_put(uwb_dev); /* for the creation in _onair() */ return 0; } /** * A device went off the air, clean up after it! * * This is called by the UWB Daemon (through the beacon purge function * uwb_bcn_cache_purge) when it is detected that a device has been in * radio silence for a while. * * If this device is actually a local radio controller we don't need * to go through the offair process, as it is not registered as that. * * NOTE: uwb_bcn_cache.mutex is held! */ void uwbd_dev_offair(struct uwb_beca_e *bce) { struct uwb_dev *uwb_dev; uwb_dev = bce->uwb_dev; if (uwb_dev) { uwb_notify(uwb_dev->rc, uwb_dev, UWB_NOTIF_OFFAIR); __uwb_dev_offair(uwb_dev, uwb_dev->rc); } } /** * A device went on the air, start it up! * * This is called by the UWB Daemon when it is detected that a device * has popped up in the radio range of the radio controller. * * It will just create the freaking device, register the beacon and * stuff and yatla, done. * * * NOTE: uwb_beca.mutex is held, bce->mutex is held */ void uwbd_dev_onair(struct uwb_rc *rc, struct uwb_beca_e *bce) { int result; struct device *dev = &rc->uwb_dev.dev; struct uwb_dev *uwb_dev; char macbuf[UWB_ADDR_STRSIZE], devbuf[UWB_ADDR_STRSIZE]; uwb_mac_addr_print(macbuf, sizeof(macbuf), bce->mac_addr); uwb_dev_addr_print(devbuf, sizeof(devbuf), &bce->dev_addr); uwb_dev = kzalloc(sizeof(struct uwb_dev), GFP_KERNEL); if (uwb_dev == NULL) { dev_err(dev, "new device %s: Cannot allocate memory\n", macbuf); return; } uwb_dev_init(uwb_dev); /* This sets refcnt to one, we own it */ uwb_dev->mac_addr = *bce->mac_addr; uwb_dev->dev_addr = bce->dev_addr; dev_set_name(&uwb_dev->dev, macbuf); result = uwb_dev_add(uwb_dev, &rc->uwb_dev.dev, rc); if (result < 0) { dev_err(dev, "new device %s: cannot instantiate device\n", macbuf); goto error_dev_add; } /* plug the beacon cache */ bce->uwb_dev = uwb_dev; uwb_dev->bce = bce; uwb_bce_get(bce); /* released in uwb_dev_sys_release() */ dev_info(dev, "uwb device (mac %s dev %s) connected to %s %s\n", macbuf, devbuf, rc->uwb_dev.dev.parent->bus->name, dev_name(rc->uwb_dev.dev.parent)); uwb_notify(rc, uwb_dev, UWB_NOTIF_ONAIR); return; error_dev_add: kfree(uwb_dev); return; } /** * Iterate over the list of UWB devices, calling a @function on each * * See docs for bus_for_each().... * * @rc: radio controller for the devices. * @function: function to call. * @priv: data to pass to @function. * @returns: 0 if no invocation of function() returned a value * different to zero. That value otherwise. */ int uwb_dev_for_each(struct uwb_rc *rc, uwb_dev_for_each_f function, void *priv) { return device_for_each_child(&rc->uwb_dev.dev, priv, function); } EXPORT_SYMBOL_GPL(uwb_dev_for_each);
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-21 00:51:10 -0400