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
97 #define RTDM_MAX_MINOR 256
147 static inline struct rtdm_dev_context *rtdm_fd_to_context(
struct rtdm_fd *fd)
191 return rtdm_fd_owner(fd) != &cobalt_kernel_ppd;
204 return rtdm_fd_to_context(fd)->
device;
215 struct rtdm_profile_info {
227 struct module *owner;
284 struct notifier_block nb_statechange;
289 #define RTDM_CLASS_MAGIC 0x8284636c
309 #define RTDM_PROFILE_INFO(__name, __id, __subid, __version) \
311 .name = ( # __name ), \
312 .class_id = (__id), \
313 .subclass_id = (__subid), \
314 .version = (__version), \
315 .magic = ~RTDM_CLASS_MAGIC, \
316 .owner = THIS_MODULE, \
373 wait_queue_head_t putwq;
390 return xnclock_read_realtime(&nkclock);
395 return xnclock_read_monotonic(&nkclock);
440 #define cobalt_atomic_enter(__context) \
442 xnlock_get_irqsave(&nklock, (__context)); \
458 #define cobalt_atomic_leave(__context) \
461 xnlock_put_irqrestore(&nklock, (__context)); \
493 #define RTDM_EXECUTE_ATOMICALLY(code_block) \
495 <ENTER_ATOMIC_SECTION> \
497 <LEAVE_ATOMIC_SECTION> \
500 static inline __attribute__((deprecated)) void
501 rtdm_execute_atomically(
void) { }
503 #define RTDM_EXECUTE_ATOMICALLY(code_block) \
507 rtdm_execute_atomically(); \
508 xnlock_get_irqsave(&nklock, __rtdm_s); \
512 xnlock_put_irqrestore(&nklock, __rtdm_s); \
526 #define RTDM_LOCK_UNLOCKED(__name) IPIPE_SPIN_LOCK_UNLOCKED
528 #define DEFINE_RTDM_LOCK(__name) \
529 rtdm_lock_t __name = RTDM_LOCK_UNLOCKED(__name)
546 spin_lock_init(lock);
558 XENO_BUG_ON(COBALT, !
spltest());
584 #define rtdm_lock_get_irqsave(__lock, __context) \
585 ((__context) = __rtdm_lock_get_irqsave(__lock))
587 static inline rtdm_lockctx_t __rtdm_lock_get_irqsave(rtdm_lock_t *lock)
589 rtdm_lockctx_t context;
591 context = ipipe_test_and_stall_head();
611 ipipe_restore_head(context);
621 #define rtdm_lock_irqsave(__context) \
631 #define rtdm_lock_irqrestore(__context) \
638 struct rtdm_waitqueue {
641 typedef struct rtdm_waitqueue rtdm_waitqueue_t;
643 #define RTDM_WAITQUEUE_INITIALIZER(__name) { \
644 .wait = XNSYNCH_WAITQUEUE_INITIALIZER((__name).wait), \
647 #define DEFINE_RTDM_WAITQUEUE(__name) \
648 struct rtdm_waitqueue __name = RTDM_WAITQUEUE_INITIALIZER(__name)
650 #define DEFINE_RTDM_WAITQUEUE_ONSTACK(__name) \
651 DEFINE_RTDM_WAITQUEUE(__name)
655 *wq = (
struct rtdm_waitqueue)RTDM_WAITQUEUE_INITIALIZER(*wq);
663 static inline int __rtdm_dowait(
struct rtdm_waitqueue *wq,
678 static inline int __rtdm_timedwait(
struct rtdm_waitqueue *wq,
681 if (toseq && timeout > 0)
682 return __rtdm_dowait(wq, *toseq, XN_ABSOLUTE);
684 return __rtdm_dowait(wq, timeout, XN_RELATIVE);
687 #define rtdm_timedwait_condition_locked(__wq, __cond, __timeout, __toseq) \
690 while (__ret == 0 && !(__cond)) \
691 __ret = __rtdm_timedwait(__wq, __timeout, __toseq); \
695 #define rtdm_wait_condition_locked(__wq, __cond) \
698 while (__ret == 0 && !(__cond)) \
699 __ret = __rtdm_dowait(__wq, \
700 XN_INFINITE, XN_RELATIVE); \
704 #define rtdm_timedwait_condition(__wq, __cond, __timeout, __toseq) \
708 xnlock_get_irqsave(&nklock, __s); \
709 __ret = rtdm_timedwait_condition_locked(__wq, __cond, \
710 __timeout, __toseq); \
711 xnlock_put_irqrestore(&nklock, __s); \
715 #define rtdm_timedwait(__wq, __timeout, __toseq) \
716 __rtdm_timedwait(__wq, __timeout, __toseq)
718 #define rtdm_timedwait_locked(__wq, __timeout, __toseq) \
719 rtdm_timedwait(__wq, __timeout, __toseq)
721 #define rtdm_wait_condition(__wq, __cond) \
725 xnlock_get_irqsave(&nklock, __s); \
726 __ret = rtdm_wait_condition_locked(__wq, __cond); \
727 xnlock_put_irqrestore(&nklock, __s); \
731 #define rtdm_wait(__wq) \
732 __rtdm_dowait(__wq, XN_INFINITE, XN_RELATIVE)
734 #define rtdm_wait_locked(__wq) rtdm_wait(__wq)
736 #define rtdm_waitqueue_lock(__wq, __context) cobalt_atomic_enter(__context)
738 #define rtdm_waitqueue_unlock(__wq, __context) cobalt_atomic_leave(__context)
740 #define rtdm_waitqueue_signal(__wq) \
742 struct xnthread *__waiter; \
743 __waiter = xnsynch_wakeup_one_sleeper(&(__wq)->wait); \
748 #define __rtdm_waitqueue_flush(__wq, __reason) \
751 __ret = xnsynch_flush(&(__wq)->wait, __reason); \
753 __ret == XNSYNCH_RESCHED; \
756 #define rtdm_waitqueue_broadcast(__wq) \
757 __rtdm_waitqueue_flush(__wq, 0)
759 #define rtdm_waitqueue_flush(__wq) \
760 __rtdm_waitqueue_flush(__wq, XNBREAK)
762 #define rtdm_waitqueue_wakeup(__wq, __waiter) \
764 xnsynch_wakeup_this_sleeper(&(__wq)->wait, __waiter); \
768 #define rtdm_for_each_waiter(__pos, __wq) \
769 xnsynch_for_each_sleeper(__pos, &(__wq)->wait)
771 #define rtdm_for_each_waiter_safe(__pos, __tmp, __wq) \
772 xnsynch_for_each_sleeper_safe(__pos, __tmp, &(__wq)->wait)
784 typedef struct xnintr rtdm_irq_t;
792 #define RTDM_IRQTYPE_SHARED XN_IRQTYPE_SHARED
795 #define RTDM_IRQTYPE_EDGE XN_IRQTYPE_EDGE
813 #define RTDM_IRQ_NONE XN_IRQ_NONE
815 #define RTDM_IRQ_HANDLED XN_IRQ_HANDLED
817 #define RTDM_IRQ_DISABLE XN_IRQ_DISABLE
831 #define rtdm_irq_get_arg(irq_handle, type) ((type *)irq_handle->cookie)
836 const char *device_name,
void *arg);
841 if (!XENO_ASSERT(COBALT, xnsched_root_p()))
867 typedef struct rtdm_nrtsig rtdm_nrtsig_t;
892 nrt_sig->handler = handler;
898 nrt_sig->handler = NULL;
912 typedef struct xntimer rtdm_timer_t;
941 #define rtdm_timer_init(timer, handler, name) \
943 xntimer_init((timer), &nkclock, handler, \
944 NULL, XNTIMER_IGRAVITY); \
945 xntimer_set_name((timer), (name)); \
964 return xntimer_start(timer, expiry, interval, (xntmode_t)mode);
979 typedef struct xnthread rtdm_task_t;
992 #define RTDM_TASK_LOWEST_PRIORITY 0
993 #define RTDM_TASK_HIGHEST_PRIORITY 99
1000 #define RTDM_TASK_RAISE_PRIORITY (+1)
1001 #define RTDM_TASK_LOWER_PRIORITY (-1)
1009 int __rtdm_task_sleep(xnticks_t timeout, xntmode_t mode);
1026 static inline void __deprecated rtdm_task_join_nrt(rtdm_task_t *task,
1027 unsigned int poll_delay)
1034 union xnsched_policy_param param = { .rt = { .prio = priority } };
1045 if (start_date == 0)
1046 start_date = XN_INFINITE;
1066 if (!XENO_ASSERT(COBALT, !xnsched_unblockable_p()))
1073 return __rtdm_task_sleep(delay, XN_RELATIVE);
1082 return __rtdm_task_sleep(wakeup_date, (xntmode_t)mode);
1088 return __rtdm_task_sleep(wakeup_time, XN_REALTIME);
1091 #define rtdm_task_busy_wait(__condition, __spin_ns, __sleep_ns) \
1094 nanosecs_abs_t __end; \
1097 __end = rtdm_clock_read_monotonic() + __spin_ns; \
1101 if (rtdm_clock_read_monotonic() >= __end) \
1104 __ret = rtdm_task_sleep(__sleep_ns); \
1116 typedef struct rtdm_event {
1117 struct xnsynch synch_base;
1118 DECLARE_XNSELECT(select_block);
1121 #define RTDM_EVENT_PENDING XNSYNCH_SPARE1
1128 rtdm_toseq_t *timeout_seq);
1139 typedef struct rtdm_sem {
1140 unsigned long value;
1141 struct xnsynch synch_base;
1142 DECLARE_XNSELECT(select_block);
1150 rtdm_toseq_t *timeout_seq);
1157 typedef struct rtdm_mutex {
1158 struct xnsynch synch_base;
1165 rtdm_toseq_t *timeout_seq);
1171 #define rtdm_printk(format, ...) printk(format, ##__VA_ARGS__)
1173 struct rtdm_ratelimit_state {
1182 int rtdm_ratelimit(
struct rtdm_ratelimit_state *rs,
const char *func);
1184 #define DEFINE_RTDM_RATELIMIT_STATE(name, interval_init, burst_init) \
1185 struct rtdm_ratelimit_state name = { \
1186 .lock = RTDM_LOCK_UNLOCKED((name).lock), \
1187 .interval = interval_init, \
1188 .burst = burst_init, \
1192 #define DEF_RTDM_RATELIMIT_INTERVAL 5000000000LL
1193 #define DEF_RTDM_RATELIMIT_BURST 10
1195 #define rtdm_printk_ratelimited(fmt, ...) ({ \
1196 static DEFINE_RTDM_RATELIMIT_STATE(_rs, \
1197 DEF_RTDM_RATELIMIT_INTERVAL, \
1198 DEF_RTDM_RATELIMIT_BURST); \
1200 if (rtdm_ratelimit(&_rs, __func__)) \
1201 printk(fmt, ##__VA_ARGS__); \
1207 return xnmalloc(size);
1216 void *src_addr,
size_t len,
1217 int prot,
void **pptr,
1218 struct vm_operations_struct *vm_ops,
1219 void *vm_private_data);
1222 phys_addr_t src_addr,
size_t len,
1223 int prot,
void **pptr,
1224 struct vm_operations_struct *vm_ops,
1225 void *vm_private_data);
1236 const void __user *ptr,
size_t size)
1238 return access_rok(ptr, size);
1242 const void __user *ptr,
size_t size)
1244 return access_wok(ptr, size);
1248 void *dst,
const void __user *src,
1251 return __xn_copy_from_user(dst, src, size) ? -EFAULT : 0;
1255 void *dst,
const void __user *src,
1258 return cobalt_copy_from_user(dst, src, size);
1262 void __user *dst,
const void *src,
1265 return __xn_copy_to_user(dst, src, size) ? -EFAULT : 0;
1269 void __user *dst,
const void *src,
1272 return cobalt_copy_to_user(dst, src, size);
1277 const char __user *src,
size_t count)
1279 return cobalt_strncpy_from_user(dst, src, count);
1284 if (!XENO_ASSERT(COBALT, !xnsched_interrupt_p()))
1288 return !xnsched_root_p();
1295 return (ipipe_current_domain != ipipe_root_domain);
void(* rtdm_task_proc_t)(void *arg)
Real-time task procedure.
Definition: driver.h:986
static void rtdm_lock_put_irqrestore(rtdm_lock_t *lock, rtdm_lockctx_t context)
Release lock and restore preemption state.
Definition: driver.h:607
void rtdm_mutex_destroy(rtdm_mutex_t *mutex)
Destroy a mutex.
Definition: drvlib.c:1177
struct rtdm_fd_ops ops
I/O operation handlers.
Definition: driver.h:267
void rtdm_task_busy_sleep(nanosecs_rel_t delay)
Busy-wait a specified amount of time.
Definition: drvlib.c:400
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:265
void xnintr_enable(struct xnintr *intr)
Enable an interrupt line.
Definition: intr.c:892
void rtdm_mutex_unlock(rtdm_mutex_t *mutex)
Release a mutex.
Definition: drvlib.c:1195
void(* rtdm_nrtsig_handler_t)(rtdm_nrtsig_t *nrt_sig, void *arg)
Non-real-time signal handler.
Definition: driver.h:878
void xnintr_detach(struct xnintr *intr)
Detach an interrupt descriptor.
Definition: intr.c:866
Select ouput buffer availability events.
Definition: driver.h:116
ipipe_spinlock_t rtdm_lock_t
Lock variable.
Definition: driver.h:532
void xnthread_cancel(struct xnthread *thread)
Cancel a thread.
Definition: thread.c:1528
#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:2017
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:161
static void rtdm_lock_put(rtdm_lock_t *lock)
Release lock without preemption restoration.
Definition: driver.h:570
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:254
Adjustable timer with absolute timeout.
Definition: driver.h:934
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(* rtdm_irq_handler_t)(rtdm_irq_t *irq_handle)
Interrupt handler.
Definition: driver.h:805
char dev_private[0]
Begin of driver defined context data structure.
Definition: driver.h:144
int rtdm_ratelimit(struct rtdm_ratelimit_state *rs, const char *func)
Enforces a rate limit.
Definition: drvlib.c:2039
void xnintr_disable(struct xnintr *intr)
Disable an interrupt line.
Definition: intr.c:923
size_t context_size
Size of driver defined appendix to struct rtdm_dev_context.
Definition: driver.h:261
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:473
int rtdm_dev_register(struct rtdm_device *device)
Register a RTDM device.
Definition: device.c:360
#define XNTIMEO
Woken up due to a timeout condition.
Definition: thread.h:66
void rtdm_task_join(rtdm_task_t *task)
Wait on a real-time task to terminate.
Definition: drvlib.c:377
int(* start)(struct rtdm_driver *drv)
Handler called upon transition to COBALT_STATE_WARMUP.
Definition: driver.h:237
Select exceptional events.
Definition: driver.h:119
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:1115
void * device_data
Driver definable device data.
Definition: driver.h:329
static struct rtdm_device * rtdm_fd_device(struct rtdm_fd *fd)
Locate a device structure from a file descriptor.
Definition: driver.h:202
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:1340
void rtdm_timer_destroy(rtdm_timer_t *timer)
Destroy a timer.
Definition: drvlib.c:443
int rtdm_event_wait(rtdm_event_t *event)
Wait on event occurrence.
Definition: drvlib.c:743
int rtdm_mutex_lock(rtdm_mutex_t *mutex)
Request a mutex.
Definition: drvlib.c:1225
void rtdm_event_pulse(rtdm_event_t *event)
Signal an event occurrence to currently listening waiters.
Definition: drvlib.c:683
#define spltest()
Test hard interrupt state on the local processor.
Definition: lock.h:64
Monotonic timer with absolute timeout.
Definition: driver.h:931
void rtdm_toseq_init(rtdm_toseq_t *timeout_seq, nanosecs_rel_t timeout)
Initialise a timeout sequence.
Definition: drvlib.c:613
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:1014
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:1488
int xnsynch_destroy(struct xnsynch *synch)
Destroy a synchronization object.
Definition: synch.c:117
static struct xnthread * xnthread_current(void)
Retrieve the current Cobalt core TCB.
Definition: thread.h:371
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:189
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:341
RTDM state management handlers.
Definition: driver.h:235
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:882
int xnthread_wait_period(unsigned long *overruns_r)
Wait for the next periodic release point.
Definition: thread.c:1393
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:495
void rtdm_timer_stop(rtdm_timer_t *timer)
Stop a timer.
Definition: drvlib.c:495
int xntimer_start(struct xntimer *timer, xnticks_t value, xnticks_t interval, xntmode_t mode)
Arm a timer.
Definition: timer.c:113
static void rtdm_lock_init(rtdm_lock_t *lock)
Dynamic lock initialisation.
Definition: driver.h:544
int rtdm_irq_disable(rtdm_irq_t *irq_handle)
Disable interrupt line.
rtdm_selecttype
Definition: driver.h:111
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:664
int rtdm_task_wait_period(unsigned long *overruns_r)
Wait on next real-time task period.
void rtdm_sem_init(rtdm_sem_t *sem, unsigned long value)
Initialise a semaphore.
Definition: drvlib.c:923
Select input data availability events.
Definition: driver.h:113
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:1299
int device_flags
Device flags, see Device Flags for details.
Definition: driver.h:259
struct rtdm_driver * driver
Device driver.
Definition: driver.h:327
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:141
void rtdm_event_signal(rtdm_event_t *event)
Signal an event occurrence.
Definition: drvlib.c:701
int xnsynch_sleep_on(struct xnsynch *synch, xnticks_t timeout, xntmode_t timeout_mode)
Sleep on an ownerless synchronization object.
Definition: synch.c:162
void rtdm_mutex_init(rtdm_mutex_t *mutex)
Initialise a mutex.
Definition: drvlib.c:1159
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.
#define XNBREAK
Forcibly awaken from a wait state.
Definition: thread.h:68
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:465
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:1208
int device_count
Count of devices this driver manages.
Definition: driver.h:274
void rtdm_event_init(rtdm_event_t *event, unsigned long pending)
Initialise an event.
Definition: drvlib.c:638
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:1968
int xnthread_join(struct xnthread *thread, bool uninterruptible)
Join with a terminated thread.
Definition: thread.c:1657
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:926
int rtdm_task_set_period(rtdm_task_t *task, nanosecs_abs_t start_date, nanosecs_rel_t period)
Adjust real-time task period.
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:1519
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:781
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:1259
#define XNRMID
Pending on a removed resource.
Definition: thread.h:67
int protocol_family
Protocol device identification: protocol family (PF_xxx)
Definition: driver.h:263
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:1830
Device context.
Definition: driver.h:136
static int xnsched_run(void)
The rescheduling procedure.
Definition: sched.h:291
void rtdm_sem_destroy(rtdm_sem_t *sem)
Destroy a semaphore.
Definition: drvlib.c:948
void rtdm_sem_up(rtdm_sem_t *sem)
Increment a semaphore.
Definition: drvlib.c:1073
Monotonic timer with relative timeout.
Definition: driver.h:928
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:1899
#define RTDM_MAX_MINOR
Maximum number of named devices per driver.
Definition: driver.h:97
struct rtdm_sm_ops smops
State management handlers.
Definition: driver.h:269
RTDM device.
Definition: driver.h:325
void(* rtdm_timer_handler_t)(rtdm_timer_t *timer)
Timer handler.
Definition: driver.h:919
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:1943
int minor
Minor number of the device.
Definition: driver.h:356
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:1907
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:174
int rtdm_sem_down(rtdm_sem_t *sem)
Decrement a semaphore.
Definition: drvlib.c:976
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:535
void rtdm_event_clear(rtdm_event_t *event)
Clear event state.
Definition: drvlib.c:844
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:248
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:1996
int(* stop)(struct rtdm_driver *drv)
Handler called upon transition to COBALT_STATE_TEARDOWN.
Definition: driver.h:239
static void rtdm_lock_get(rtdm_lock_t *lock)
Acquire lock from non-preemptible contexts.
Definition: driver.h:556
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.