26 #ifndef _COBALT_RTDM_DRIVER_H
27 #define _COBALT_RTDM_DRIVER_H
29 #include <asm/atomic.h>
30 #include <linux/list.h>
31 #include <linux/module.h>
32 #include <linux/cdev.h>
33 #include <linux/wait.h>
34 #include <linux/notifier.h>
35 #include <xenomai/version.h>
36 #include <cobalt/kernel/heap.h>
37 #include <cobalt/kernel/sched.h>
38 #include <cobalt/kernel/intr.h>
39 #include <cobalt/kernel/synch.h>
40 #include <cobalt/kernel/select.h>
41 #include <cobalt/kernel/clock.h>
42 #include <cobalt/kernel/apc.h>
43 #include <cobalt/kernel/init.h>
44 #include <cobalt/kernel/ancillaries.h>
45 #include <cobalt/kernel/tree.h>
47 #include <rtdm/rtdm.h>
50 #include <cobalt/kernel/assert.h>
51 #include <trace/events/cobalt-rtdm.h>
53 #include <asm-generic/xenomai/pci_ids.h>
55 #include <asm/xenomai/syscall.h>
58 typedef struct xnselector rtdm_selector_t;
73 #define RTDM_EXCLUSIVE 0x0001
80 #define RTDM_FIXED_MINOR 0x0002
83 #define RTDM_NAMED_DEVICE 0x0010
87 #define RTDM_PROTOCOL_DEVICE 0x0020
90 #define RTDM_DEVICE_TYPE_MASK 0x00F0
93 #define RTDM_SECURE_DEVICE 0x80000000
144 static inline struct rtdm_dev_context *rtdm_fd_to_context(
struct rtdm_fd *fd)
188 return rtdm_fd_owner(fd) != &__xnsys_global_ppd;
201 return rtdm_fd_to_context(fd)->
device;
212 struct rtdm_profile_info {
224 struct module *owner;
281 struct notifier_block nb_statechange;
285 #define RTDM_CLASS_MAGIC 0x8284636c
305 #define RTDM_PROFILE_INFO(__name, __id, __subid, __version) \
307 .name = ( # __name ), \
308 .class_id = (__id), \
309 .subclass_id = (__subid), \
310 .version = (__version), \
311 .magic = ~RTDM_CLASS_MAGIC, \
312 .owner = THIS_MODULE, \
369 wait_queue_head_t putwq;
386 return xnclock_read_realtime(&nkclock);
391 return xnclock_read_monotonic(&nkclock);
436 #define cobalt_atomic_enter(context) \
438 xnlock_get_irqsave(&nklock, (context)); \
454 #define cobalt_atomic_leave(context) \
456 __xnsched_unlock(); \
457 xnlock_put_irqrestore(&nklock, (context)); \
489 #define RTDM_EXECUTE_ATOMICALLY(code_block) \
491 <ENTER_ATOMIC_SECTION> \
493 <LEAVE_ATOMIC_SECTION> \
496 static inline __attribute__((deprecated)) void
497 rtdm_execute_atomically(
void) { }
499 #define RTDM_EXECUTE_ATOMICALLY(code_block) \
503 rtdm_execute_atomically(); \
504 xnlock_get_irqsave(&nklock, __rtdm_s); \
507 __xnsched_unlock(); \
508 xnlock_put_irqrestore(&nklock, __rtdm_s); \
522 #define RTDM_LOCK_UNLOCKED(__name) IPIPE_SPIN_LOCK_UNLOCKED
524 #define DEFINE_RTDM_LOCK(__name) \
525 rtdm_lock_t __name = RTDM_LOCK_UNLOCKED(__name)
542 spin_lock_init(lock);
554 XENO_BUGON(COBALT, !
spltest());
581 static inline rtdm_lockctx_t __rtdm_lock_get_irqsave(rtdm_lock_t *lock)
583 rtdm_lockctx_t context;
585 context = ipipe_test_and_stall_head();
591 #define rtdm_lock_get_irqsave(__lock, __context) \
592 ((__context) = __rtdm_lock_get_irqsave(__lock))
607 ipipe_restore_head(context);
617 #define rtdm_lock_irqsave(context) \
627 #define rtdm_lock_irqrestore(context) \
634 struct rtdm_waitqueue {
637 typedef struct rtdm_waitqueue rtdm_waitqueue_t;
639 #define RTDM_WAITQUEUE_INITIALIZER(__name) { \
640 .wait = XNSYNCH_WAITQUEUE_INITIALIZER((__name).wait), \
643 #define DEFINE_RTDM_WAITQUEUE(__name) \
644 struct rtdm_waitqueue __name = RTDM_WAITQUEUE_INITIALIZER(__name)
646 #define DEFINE_RTDM_WAITQUEUE_ONSTACK(__name) \
647 DEFINE_RTDM_WAITQUEUE(__name)
651 *wq = (
struct rtdm_waitqueue)RTDM_WAITQUEUE_INITIALIZER(*wq);
656 xnsynch_destroy(&wq->wait);
659 static inline int __rtdm_timedwait(
struct rtdm_waitqueue *wq,
662 if (toseq && timeout > 0)
668 #define rtdm_timedwait_condition_locked(__wq, __cond, __timeout, __toseq) \
671 while (__ret == 0 && !(__cond)) \
672 __ret = __rtdm_timedwait(__wq, __timeout, __toseq); \
676 #define rtdm_wait_condition_locked(__wq, __cond) \
679 while (__ret == 0 && !(__cond)) \
680 __ret = xnsynch_sleep_on(&(__wq)->wait, \
681 XN_INFINITE, XN_RELATIVE); \
685 #define rtdm_timedwait_condition(__wq, __cond, __timeout, __toseq) \
689 xnlock_get_irqsave(&nklock, __s); \
690 __ret = rtdm_timedwait_condition_locked(__wq, __cond, \
691 __timeout, __toseq); \
692 xnlock_put_irqrestore(&nklock, __s); \
696 #define rtdm_timedwait(__wq, __timeout, __toseq) \
697 __rtdm_timedwait(__wq, __timeout, __toseq)
699 #define rtdm_timedwait_locked(__wq, __timeout, __toseq) \
700 rtdm_timedwait(__wq, __timeout, __toseq)
702 #define rtdm_wait_condition(__wq, __cond) \
706 xnlock_get_irqsave(&nklock, __s); \
707 __ret = rtdm_wait_condition_locked(__wq, __cond); \
708 xnlock_put_irqrestore(&nklock, __s); \
712 #define rtdm_wait(__wq) \
713 xnsynch_sleep_on(&(__wq)->wait, XN_INFINITE, XN_RELATIVE)
715 #define rtdm_wait_locked(__wq) rtdm_wait(__wq)
717 #define rtdm_waitqueue_lock(__wq, __context) cobalt_atomic_enter(__context)
719 #define rtdm_waitqueue_unlock(__wq, __context) cobalt_atomic_leave(__context)
721 #define rtdm_waitqueue_signal(__wq) \
723 struct xnthread *__waiter; \
724 __waiter = xnsynch_wakeup_one_sleeper(&(__wq)->wait); \
729 #define __rtdm_waitqueue_flush(__wq, __reason) \
732 __ret = xnsynch_flush(&(__wq)->wait, __reason); \
734 __ret == XNSYNCH_RESCHED; \
737 #define rtdm_waitqueue_broadcast(__wq) \
738 __rtdm_waitqueue_flush(__wq, 0)
740 #define rtdm_waitqueue_flush(__wq) \
741 __rtdm_waitqueue_flush(__wq, XNBREAK)
743 #define rtdm_waitqueue_wakeup(__wq, __waiter) \
745 xnsynch_wakeup_this_sleeper(&(__wq)->wait, __waiter); \
749 #define rtdm_for_each_waiter(__pos, __wq) \
750 xnsynch_for_each_sleeper(__pos, &(__wq)->wait)
752 #define rtdm_for_each_waiter_safe(__pos, __tmp, __wq) \
753 xnsynch_for_each_sleeper_safe(__pos, __tmp, &(__wq)->wait)
765 typedef struct xnintr rtdm_irq_t;
773 #define RTDM_IRQTYPE_SHARED XN_IRQTYPE_SHARED
776 #define RTDM_IRQTYPE_EDGE XN_IRQTYPE_EDGE
794 #define RTDM_IRQ_NONE XN_IRQ_NONE
796 #define RTDM_IRQ_HANDLED XN_IRQ_HANDLED
798 #define RTDM_IRQ_DISABLE XN_IRQ_DISABLE
812 #define rtdm_irq_get_arg(irq_handle, type) ((type *)irq_handle->cookie)
817 const char *device_name,
void *arg);
822 if (!XENO_ASSERT(COBALT, xnsched_root_p()))
848 typedef struct rtdm_nrtsig rtdm_nrtsig_t;
873 nrt_sig->handler = handler;
879 nrt_sig->handler = NULL;
893 typedef struct xntimer rtdm_timer_t;
922 #define rtdm_timer_init(timer, handler, name) \
924 xntimer_init((timer), &nkclock, handler, \
925 NULL, XNTIMER_IGRAVITY); \
926 xntimer_set_name((timer), (name)); \
945 return xntimer_start(timer, expiry, interval, (xntmode_t)mode);
960 typedef struct xnthread rtdm_task_t;
973 #define RTDM_TASK_LOWEST_PRIORITY 0
974 #define RTDM_TASK_HIGHEST_PRIORITY 99
981 #define RTDM_TASK_RAISE_PRIORITY (+1)
982 #define RTDM_TASK_LOWER_PRIORITY (-1)
990 int __rtdm_task_sleep(xnticks_t timeout, xntmode_t mode);
1007 static inline void __deprecated rtdm_task_join_nrt(rtdm_task_t *task,
1008 unsigned int poll_delay)
1015 union xnsched_policy_param param = { .rt = { .prio = priority } };
1044 if (!XENO_ASSERT(COBALT, !xnsched_unblockable_p()))
1051 return __rtdm_task_sleep(delay, XN_RELATIVE);
1060 return __rtdm_task_sleep(wakeup_date, (xntmode_t)mode);
1066 return __rtdm_task_sleep(wakeup_time, XN_REALTIME);
1069 #define rtdm_task_busy_wait(__condition, __spin_ns, __sleep_ns) \
1072 nanosecs_abs_t __end; \
1075 __end = rtdm_clock_read_monotonic() + __spin_ns; \
1079 if (rtdm_clock_read_monotonic() >= __end) \
1082 __ret = rtdm_task_sleep(__sleep_ns); \
1094 typedef struct rtdm_event {
1095 struct xnsynch synch_base;
1096 DECLARE_XNSELECT(select_block);
1099 #define RTDM_EVENT_PENDING XNSYNCH_SPARE1
1106 rtdm_toseq_t *timeout_seq);
1117 typedef struct rtdm_sem {
1118 unsigned long value;
1119 struct xnsynch synch_base;
1120 DECLARE_XNSELECT(select_block);
1128 rtdm_toseq_t *timeout_seq);
1135 typedef struct rtdm_mutex {
1136 struct xnsynch synch_base;
1143 rtdm_toseq_t *timeout_seq);
1149 #define rtdm_printk(format, ...) printk(format, ##__VA_ARGS__)
1151 struct rtdm_ratelimit_state {
1160 int rtdm_ratelimit(
struct rtdm_ratelimit_state *rs,
const char *func);
1162 #define DEFINE_RTDM_RATELIMIT_STATE(name, interval_init, burst_init) \
1163 struct rtdm_ratelimit_state name = { \
1164 .lock = RTDM_LOCK_UNLOCKED((name).lock), \
1165 .interval = interval_init, \
1166 .burst = burst_init, \
1170 #define DEF_RTDM_RATELIMIT_INTERVAL 5000000000LL
1171 #define DEF_RTDM_RATELIMIT_BURST 10
1173 #define rtdm_printk_ratelimited(fmt, ...) ({ \
1174 static DEFINE_RTDM_RATELIMIT_STATE(_rs, \
1175 DEF_RTDM_RATELIMIT_INTERVAL, \
1176 DEF_RTDM_RATELIMIT_BURST); \
1178 if (rtdm_ratelimit(&_rs, __func__)) \
1179 printk(fmt, ##__VA_ARGS__); \
1185 return xnmalloc(size);
1194 void *src_addr,
size_t len,
1195 int prot,
void **pptr,
1196 struct vm_operations_struct *vm_ops,
1197 void *vm_private_data);
1200 phys_addr_t src_addr,
size_t len,
1201 int prot,
void **pptr,
1202 struct vm_operations_struct *vm_ops,
1203 void *vm_private_data);
1214 const void __user *ptr,
size_t size)
1216 return access_rok(ptr, size);
1220 const void __user *ptr,
size_t size)
1222 return access_wok(ptr, size);
1226 void *dst,
const void __user *src,
1229 return __xn_copy_from_user(dst, src, size) ? -EFAULT : 0;
1233 void *dst,
const void __user *src,
1236 return (!access_rok(src, size) ||
1237 __xn_copy_from_user(dst, src, size)) ? -EFAULT : 0;
1241 void __user *dst,
const void *src,
1244 return __xn_copy_to_user(dst, src, size) ? -EFAULT : 0;
1248 void __user *dst,
const void *src,
1251 return (!access_wok(dst, size) ||
1252 __xn_copy_to_user(dst, src, size)) ? -EFAULT : 0;
1257 const char __user *src,
size_t count)
1259 if (unlikely(!access_rok(src, 1)))
1261 return __xn_strncpy_from_user(dst, src, count);
1266 if (!XENO_ASSERT(COBALT, !xnsched_interrupt_p()))
1270 return !xnsched_root_p();
1277 return (ipipe_current_domain != ipipe_root_domain);
static void rtdm_lock_put_irqrestore(rtdm_lock_t *lock, rtdm_lockctx_t context)
Release lock and restore preemption state.
Definition: driver.h:603
void rtdm_mutex_destroy(rtdm_mutex_t *mutex)
Destroy a mutex.
Definition: drvlib.c:1166
struct rtdm_fd_ops ops
I/O operation handlers.
Definition: driver.h:264
void rtdm_task_busy_sleep(nanosecs_rel_t delay)
Busy-wait a specified amount of time.
Definition: drvlib.c:387
int rtdm_nrtsig_init(rtdm_nrtsig_t *nrt_sig, rtdm_nrtsig_handler_t handler, void *arg)
Register a non-real-time signal handler.
int socket_type
Protocol device identification: socket type (SOCK_xxx)
Definition: driver.h:262
void xnintr_enable(struct xnintr *intr)
Enable an interrupt line.
Definition: intr.c:889
void rtdm_mutex_unlock(rtdm_mutex_t *mutex)
Release a mutex.
Definition: drvlib.c:1184
void xnintr_detach(struct xnintr *intr)
Detach an interrupt descriptor.
Definition: intr.c:863
Select ouput buffer availability events.
Definition: driver.h:113
void(* rtdm_timer_handler_t)(rtdm_timer_t *timer)
Timer handler.
Definition: driver.h:900
ipipe_spinlock_t rtdm_lock_t
Lock variable.
Definition: driver.h:528
void xnthread_cancel(struct xnthread *thread)
Cancel a thread.
Definition: thread.c:1468
#define XNCANCELD
Cancellation request is pending.
Definition: thread.h:72
int rtdm_rw_user_ok(struct rtdm_fd *fd, const void __user *ptr, size_t size)
Check if read/write access to user-space memory block is safe.
int rtdm_munmap(void *ptr, size_t len)
Unmap a user memory range.
Definition: drvlib.c:2000
int rtdm_task_sleep_abs(nanosecs_abs_t wakeup_time, enum rtdm_timer_mode mode)
Sleep until a specified absolute time.
static void * rtdm_fd_to_private(struct rtdm_fd *fd)
Locate the driver private area associated to a device context structure.
Definition: driver.h:158
static void rtdm_lock_put(rtdm_lock_t *lock)
Release lock without preemption restoration.
Definition: driver.h:566
int64_t nanosecs_rel_t
RTDM type for representing relative intervals.
Definition: rtdm.h:49
struct rtdm_profile_info profile_info
Class profile information.
Definition: driver.h:251
Adjustable timer with absolute timeout.
Definition: driver.h:915
void rtdm_timer_stop_in_handler(rtdm_timer_t *timer)
Stop a timer from inside a timer handler.
RTDM file operation descriptor.
Definition: fd.h:243
int(* start)(struct rtdm_driver *drv)
Handler called upon transition to COBALT_STATE_WARMUP.
Definition: driver.h:234
char dev_private[0]
Begin of driver defined context data structure.
Definition: driver.h:141
int rtdm_ratelimit(struct rtdm_ratelimit_state *rs, const char *func)
Enforces a rate limit.
Definition: drvlib.c:2022
void xnintr_disable(struct xnintr *intr)
Disable an interrupt line.
Definition: intr.c:920
size_t context_size
Size of driver defined appendix to struct rtdm_dev_context.
Definition: driver.h:258
int rtdm_timer_start(rtdm_timer_t *timer, nanosecs_abs_t expiry, nanosecs_rel_t interval, enum rtdm_timer_mode mode)
Start a timer.
Definition: drvlib.c:460
int rtdm_dev_register(struct rtdm_device *device)
Register a RTDM device.
Definition: device.c:357
void rtdm_task_join(rtdm_task_t *task)
Wait on a real-time task to terminate.
Definition: drvlib.c:364
Select exceptional events.
Definition: driver.h:116
int rtdm_sem_select(rtdm_sem_t *sem, rtdm_selector_t *selector, enum rtdm_selecttype type, unsigned int fd_index)
Bind a selector to a semaphore.
Definition: drvlib.c:1104
void * device_data
Driver definable device data.
Definition: driver.h:325
static struct rtdm_device * rtdm_fd_device(struct rtdm_fd *fd)
Locate a device structure from a file descriptor.
Definition: driver.h:199
int rtdm_strncpy_from_user(struct rtdm_fd *fd, char *dst, const char __user *src, size_t count)
Copy user-space string to specified buffer.
void * rtdm_malloc(size_t size)
Allocate memory block.
int rtdm_task_sleep(nanosecs_rel_t delay)
Sleep a specified amount of time.
int rtdm_irq_request(rtdm_irq_t *irq_handle, unsigned int irq_no, rtdm_irq_handler_t handler, unsigned long flags, const char *device_name, void *arg)
Register an interrupt handler.
Definition: drvlib.c:1329
void rtdm_timer_destroy(rtdm_timer_t *timer)
Destroy a timer.
Definition: drvlib.c:430
int rtdm_event_wait(rtdm_event_t *event)
Wait on event occurrence.
Definition: drvlib.c:730
int rtdm_mutex_lock(rtdm_mutex_t *mutex)
Request a mutex.
Definition: drvlib.c:1214
void rtdm_event_pulse(rtdm_event_t *event)
Signal an event occurrence to currently listening waiters.
Definition: drvlib.c:670
Monotonic timer with absolute timeout.
Definition: driver.h:912
void rtdm_toseq_init(rtdm_toseq_t *timeout_seq, nanosecs_rel_t timeout)
Initialise a timeout sequence.
Definition: drvlib.c:600
int rtdm_sem_timeddown(rtdm_sem_t *sem, nanosecs_rel_t timeout, rtdm_toseq_t *timeout_seq)
Decrement a semaphore with timeout.
Definition: drvlib.c:1003
rtdm_task_t * rtdm_task_current(void)
Get current real-time task.
void rtdm_nrtsig_pend(rtdm_nrtsig_t *nrt_sig)
Trigger non-real-time signal.
Definition: drvlib.c:1475
static struct xnthread * xnthread_current(void)
Retrieve the current Cobalt core TCB.
Definition: thread.h:352
int rtdm_irq_enable(rtdm_irq_t *irq_handle)
Enable interrupt line.
static bool rtdm_fd_is_user(struct rtdm_fd *fd)
Tell whether the passed file descriptor belongs to an application.
Definition: driver.h:186
#define spltest()
Test hard interrupt state on the local processor.
Definition: lock.h:64
void rtdm_waitqueue_destroy(struct rtdm_waitqueue *wq)
Deletes a RTDM wait queue.
const char * label
Device label template for composing the device name.
Definition: driver.h:337
RTDM state management handlers.
Definition: driver.h:232
int rtdm_event_select(rtdm_event_t *event, rtdm_selector_t *selector, enum rtdm_selecttype type, unsigned int fd_index)
Bind a selector to an event.
Definition: drvlib.c:871
int xnthread_wait_period(unsigned long *overruns_r)
Wait for the next periodic release point.
Definition: thread.c:1335
uint64_t nanosecs_abs_t
RTDM type for representing absolute dates.
Definition: rtdm.h:43
int rtdm_copy_from_user(struct rtdm_fd *fd, void *dst, const void __user *src, size_t size)
Copy user-space memory block to specified buffer.
void rtdm_dev_unregister(struct rtdm_device *device)
Unregister a RTDM device.
Definition: device.c:476
void rtdm_timer_stop(rtdm_timer_t *timer)
Stop a timer.
Definition: drvlib.c:482
int xntimer_start(struct xntimer *timer, xnticks_t value, xnticks_t interval, xntmode_t mode)
Arm a timer.
Definition: timer.c:101
static void rtdm_lock_init(rtdm_lock_t *lock)
Dynamic lock initialisation.
Definition: driver.h:540
void(* rtdm_task_proc_t)(void *arg)
Real-time task procedure.
Definition: driver.h:967
int rtdm_irq_disable(rtdm_irq_t *irq_handle)
Disable interrupt line.
rtdm_selecttype
Definition: driver.h:108
int rtdm_copy_to_user(struct rtdm_fd *fd, void __user *dst, const void *src, size_t size)
Copy specified buffer to user-space memory block.
void rtdm_event_destroy(rtdm_event_t *event)
Destroy an event.
Definition: drvlib.c:651
void rtdm_sem_init(rtdm_sem_t *sem, unsigned long value)
Initialise a semaphore.
Definition: drvlib.c:912
int(* stop)(struct rtdm_driver *drv)
Handler called upon transition to COBALT_STATE_TEARDOWN.
Definition: driver.h:236
Select input data availability events.
Definition: driver.h:110
nanosecs_abs_t rtdm_clock_read(void)
Get system time.
int xnthread_set_periodic(struct xnthread *thread, xnticks_t idate, xntmode_t timeout_mode, xnticks_t period)
Make a thread periodic.
Definition: thread.c:1254
int device_flags
Device flags, see Device Flags for details.
Definition: driver.h:256
struct rtdm_driver * driver
Device driver.
Definition: driver.h:323
int rtdm_task_unblock(rtdm_task_t *task)
Activate a blocked real-time task.
struct rtdm_device * device
Set of active device operation handlers.
Definition: driver.h:138
void rtdm_event_signal(rtdm_event_t *event)
Signal an event occurrence.
Definition: drvlib.c:688
int(* rtdm_irq_handler_t)(rtdm_irq_t *irq_handle)
Interrupt handler.
Definition: driver.h:786
int xnsynch_sleep_on(struct xnsynch *synch, xnticks_t timeout, xntmode_t timeout_mode)
Sleep on an ownerless synchronization object.
Definition: synch.c:135
int rtdm_task_wait_period(void)
Wait on next real-time task period.
void rtdm_mutex_init(rtdm_mutex_t *mutex)
Initialise a mutex.
Definition: drvlib.c:1148
nanosecs_abs_t rtdm_clock_read_monotonic(void)
Get monotonic time.
int rtdm_rt_capable(struct rtdm_fd *fd)
Test if the caller is capable of running in real-time context.
Copyright © 2011 Gilles Chanteperdrix gilles.chanteperdrix@xenomai.org.
Definition: atomic.h:24
int rtdm_task_sleep_until(nanosecs_abs_t wakeup_time)
Sleep until a specified absolute time.
int rtdm_safe_copy_to_user(struct rtdm_fd *fd, void __user *dst, const void *src, size_t size)
Check if read/write access to user-space memory block is safe and copy specified buffer to it...
static void xntimer_stop(struct xntimer *timer)
Disarm a timer.
Definition: timer.h:429
int rtdm_irq_free(rtdm_irq_t *irq_handle)
Release an interrupt handler.
int xnthread_unblock(struct xnthread *thread)
Unblock a thread.
Definition: thread.c:1167
int device_count
Count of devices this driver manages.
Definition: driver.h:271
void rtdm_event_init(rtdm_event_t *event, unsigned long pending)
Initialise an event.
Definition: drvlib.c:625
void rtdm_free(void *ptr)
Release real-time memory block.
int rtdm_mmap_vmem(struct vm_area_struct *vma, void *va)
Map a virtual memory range to a virtual user area.
Definition: drvlib.c:1951
int xnthread_join(struct xnthread *thread, bool uninterruptible)
Join with a terminated thread.
Definition: thread.c:1554
int rtdm_in_rt_context(void)
Test if running in a real-time task.
int rtdm_task_should_stop(void)
Check for pending termination request.
rtdm_timer_mode
Definition: driver.h:907
int rtdm_timer_start_in_handler(rtdm_timer_t *timer, nanosecs_abs_t expiry, nanosecs_rel_t interval, enum rtdm_timer_mode mode)
Start a timer from inside a timer handler.
void rtdm_task_set_priority(rtdm_task_t *task, int priority)
Adjust real-time task priority.
void rtdm_schedule_nrt_work(struct work_struct *lostage_work)
Put a work task in Linux non real-time global workqueue from primary mode.
Definition: drvlib.c:1506
void rtdm_waitqueue_init(struct rtdm_waitqueue *wq)
Initialize a RTDM wait queue.
int rtdm_event_timedwait(rtdm_event_t *event, nanosecs_rel_t timeout, rtdm_toseq_t *timeout_seq)
Wait on event occurrence with timeout.
Definition: drvlib.c:768
void rtdm_task_destroy(rtdm_task_t *task)
Destroy a real-time task.
int rtdm_mutex_timedlock(rtdm_mutex_t *mutex, nanosecs_rel_t timeout, rtdm_toseq_t *timeout_seq)
Request a mutex with timeout.
Definition: drvlib.c:1248
int protocol_family
Protocol device identification: protocol family (PF_xxx)
Definition: driver.h:260
void(* rtdm_nrtsig_handler_t)(rtdm_nrtsig_t *nrt_sig, void *arg)
Non-real-time signal handler.
Definition: driver.h:859
int rtdm_mmap_to_user(struct rtdm_fd *fd, void *src_addr, size_t len, int prot, void **pptr, struct vm_operations_struct *vm_ops, void *vm_private_data)
Map a kernel memory range into the address space of the user.
Definition: drvlib.c:1813
Device context.
Definition: driver.h:133
static int xnsched_run(void)
The rescheduling procedure.
Definition: sched.h:262
void rtdm_sem_destroy(rtdm_sem_t *sem)
Destroy a semaphore.
Definition: drvlib.c:937
void rtdm_sem_up(rtdm_sem_t *sem)
Increment a semaphore.
Definition: drvlib.c:1062
Monotonic timer with relative timeout.
Definition: driver.h:909
int rtdm_iomap_to_user(struct rtdm_fd *fd, phys_addr_t src_addr, size_t len, int prot, void **pptr, struct vm_operations_struct *vm_ops, void *vm_private_data)
Map an I/O memory range into the address space of the user.
Definition: drvlib.c:1882
int rtdm_task_set_period(rtdm_task_t *task, nanosecs_rel_t period)
Adjust real-time task period.
struct rtdm_sm_ops smops
State management handlers.
Definition: driver.h:266
RTDM device.
Definition: driver.h:321
int rtdm_mmap_kmem(struct vm_area_struct *vma, void *va)
Map a kernel logical memory range to a virtual user area.
Definition: drvlib.c:1926
int minor
Minor number of the device.
Definition: driver.h:352
int xnthread_set_schedparam(struct xnthread *thread, struct xnsched_class *sched_class, const union xnsched_policy_param *sched_param)
Change the base scheduling parameters of a thread.
Definition: thread.c:1764
static struct rtdm_fd * rtdm_private_to_fd(void *dev_private)
Locate a device file descriptor structure from its driver private area.
Definition: driver.h:171
int rtdm_sem_down(rtdm_sem_t *sem)
Decrement a semaphore.
Definition: drvlib.c:965
int rtdm_task_init(rtdm_task_t *task, const char *name, rtdm_task_proc_t task_proc, void *arg, int priority, nanosecs_rel_t period)
Initialise and start a real-time task.
Definition: drvlib.c:107
unsigned long rtdm_lockctx_t
Variable to save the context while holding a lock.
Definition: driver.h:531
void rtdm_event_clear(rtdm_event_t *event)
Clear event state.
Definition: drvlib.c:833
int rtdm_read_user_ok(struct rtdm_fd *fd, const void __user *ptr, size_t size)
Check if read access to user-space memory block is safe.
RTDM driver.
Definition: driver.h:245
int rtdm_mmap_iomem(struct vm_area_struct *vma, phys_addr_t pa)
Map an I/O memory range to a virtual user area.
Definition: drvlib.c:1979
static void rtdm_lock_get(rtdm_lock_t *lock)
Acquire lock from non-preemptible contexts.
Definition: driver.h:552
void rtdm_nrtsig_destroy(rtdm_nrtsig_t *nrt_sig)
Release a non-realtime signal handler.
int rtdm_safe_copy_from_user(struct rtdm_fd *fd, void *dst, const void __user *src, size_t size)
Check if read access to user-space memory block and copy it to specified buffer.