static inline int __rt_comedi_command_data_wread(void *dev, unsigned int subdev, long nchans, lsampl_t *data, RTIME until, unsigned int *cbmaskarg, int waitmode) { unsigned int cbmask, mask; long retval, kspace; if ((kspace = KSPACE(cbmaskarg))) { mask = cbmaskarg[0]; } else { rt_get_user(mask, cbmaskarg); } switch (waitmode) { case WAIT: retval = rt_comedi_wait(&cbmask); break; case WAITIF: retval = rt_comedi_wait_if(&cbmask); break; case WAITUNTIL: retval = _rt_comedi_wait_until(&cbmask, until); break; default: // useless, just to avoid compiler warnings return RTE_PERM; } if (!retval && (mask & cbmask)) { if (kspace) { cbmaskarg[0] = cbmask; } else { rt_put_user(cbmask, cbmaskarg); } return rt_comedi_command_data_read(dev, subdev, nchans, data); } return retval; }
static inline long long handle_lxrt_request (unsigned int lxsrq, long *arg, RT_TASK *task) { #define larg ((struct arg *)arg) union {unsigned long name; RT_TASK *rt_task; SEM *sem; MBX *mbx; RWL *rwl; SPL *spl; int i; void *p; long long ll; } arg0; int srq; if (likely((srq = SRQ(lxsrq)) < MAX_LXRT_FUN)) { unsigned long type; struct rt_fun_entry *funcm; /* * The next two lines of code do a lot. It makes possible to extend the use of * USP to any other real time module service in user space, both for soft and * hard real time. Concept contributed and copyrighted by: Giuseppe Renoldi * ([email protected]). */ if (unlikely(!(funcm = rt_fun_ext[INDX(lxsrq)]))) { rt_printk("BAD: null rt_fun_ext, no module for extension %d?\n", INDX(lxsrq)); return -ENOSYS; } if (!(type = funcm[srq].type)) { return ((RTAI_SYSCALL_MODE long long (*)(unsigned long, ...))funcm[srq].fun)(RTAI_FUN_ARGS); } if (unlikely(NEED_TO_RW(type))) { lxrt_fun_call_wbuf(task, funcm[srq].fun, NARG(lxsrq), arg, type); } else { lxrt_fun_call(task, funcm[srq].fun, NARG(lxsrq), arg); } return task->retval; } arg0.name = arg[0]; switch (srq) { case LXRT_GET_ADR: { arg0.p = rt_get_adr(arg0.name); return arg0.ll; } case LXRT_GET_NAME: { arg0.name = rt_get_name(arg0.p); return arg0.ll; } case LXRT_TASK_INIT: { struct arg { unsigned long name; long prio, stack_size, max_msg_size, cpus_allowed; }; arg0.rt_task = __task_init(arg0.name, larg->prio, larg->stack_size, larg->max_msg_size, larg->cpus_allowed); return arg0.ll; } case LXRT_TASK_DELETE: { arg0.i = __task_delete(arg0.rt_task ? arg0.rt_task : task); return arg0.ll; } case LXRT_SEM_INIT: { if (rt_get_adr(arg0.name)) { return 0; } if ((arg0.sem = rt_malloc(sizeof(SEM)))) { struct arg { unsigned long name; long cnt; long typ; }; lxrt_typed_sem_init(arg0.sem, larg->cnt, larg->typ); if (rt_register(larg->name, arg0.sem, IS_SEM, current)) { return arg0.ll; } else { rt_free(arg0.sem); } } return 0; } case LXRT_SEM_DELETE: { if (lxrt_sem_delete(arg0.sem)) { arg0.i = -EFAULT; return arg0.ll; } rt_free(arg0.sem); arg0.i = rt_drg_on_adr(arg0.sem); return arg0.ll; } case LXRT_MBX_INIT: { if (rt_get_adr(arg0.name)) { return 0; } if ((arg0.mbx = rt_malloc(sizeof(MBX)))) { struct arg { unsigned long name; long size; int qtype; }; if (lxrt_typed_mbx_init(arg0.mbx, larg->size, larg->qtype) < 0) { rt_free(arg0.mbx); return 0; } if (rt_register(larg->name, arg0.mbx, IS_MBX, current)) { return arg0.ll; } else { rt_free(arg0.mbx); } } return 0; } case LXRT_MBX_DELETE: { if (lxrt_mbx_delete(arg0.mbx)) { arg0.i = -EFAULT; return arg0.ll; } rt_free(arg0.mbx); arg0.i = rt_drg_on_adr(arg0.mbx); return arg0.ll; } case LXRT_RWL_INIT: { if (rt_get_adr(arg0.name)) { return 0; } if ((arg0.rwl = rt_malloc(sizeof(RWL)))) { struct arg { unsigned long name; long type; }; lxrt_typed_rwl_init(arg0.rwl, larg->type); if (rt_register(larg->name, arg0.rwl, IS_SEM, current)) { return arg0.ll; } else { rt_free(arg0.rwl); } } return 0; } case LXRT_RWL_DELETE: { if (lxrt_rwl_delete(arg0.rwl)) { arg0.i = -EFAULT; return arg0.ll; } rt_free(arg0.rwl); arg0.i = rt_drg_on_adr(arg0.rwl); return arg0.ll; } case LXRT_SPL_INIT: { if (rt_get_adr(arg0.name)) { return 0; } if ((arg0.spl = rt_malloc(sizeof(SPL)))) { struct arg { unsigned long name; }; lxrt_spl_init(arg0.spl); if (rt_register(larg->name, arg0.spl, IS_SEM, current)) { return arg0.ll; } else { rt_free(arg0.spl); } } return 0; } case LXRT_SPL_DELETE: { if (lxrt_spl_delete(arg0.spl)) { arg0.i = -EFAULT; return arg0.ll; } rt_free(arg0.spl); arg0.i = rt_drg_on_adr(arg0.spl); return arg0.ll; } case MAKE_HARD_RT: { rt_make_hard_real_time(task); return 0; if (!task || task->is_hard) { return 0; } steal_from_linux(task); return 0; } case MAKE_SOFT_RT: { rt_make_soft_real_time(task); return 0; if (!task || !task->is_hard) { return 0; } if (task->is_hard < 0) { task->is_hard = 0; } else { give_back_to_linux(task, 0); } return 0; } case PRINT_TO_SCREEN: { struct arg { char *display; long nch; }; arg0.i = rtai_print_to_screen("%s", larg->display); return arg0.ll; } case PRINTK: { struct arg { char *display; long nch; }; arg0.i = rt_printk("%s", larg->display); return arg0.ll; } case NONROOT_HRT: { #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) current->cap_effective |= ((1 << CAP_IPC_LOCK) | (1 << CAP_SYS_RAWIO) | (1 << CAP_SYS_NICE)); #else set_lxrt_perm(CAP_IPC_LOCK); set_lxrt_perm(CAP_SYS_RAWIO); set_lxrt_perm(CAP_SYS_NICE); #endif return 0; } case RT_BUDDY: { arg0.rt_task = task && current->rtai_tskext(TSKEXT1) == current ? task : NULL; return arg0.ll; } case HRT_USE_FPU: { struct arg { RT_TASK *task; long use_fpu; }; if(!larg->use_fpu) { clear_lnxtsk_uses_fpu((larg->task)->lnxtsk); } else { init_fpu((larg->task)->lnxtsk); } return 0; } case GET_USP_FLAGS: { arg0.name = arg0.rt_task->usp_flags; return arg0.ll; } case SET_USP_FLAGS: { struct arg { RT_TASK *task; unsigned long flags; }; arg0.rt_task->usp_flags = larg->flags; arg0.rt_task->force_soft = (arg0.rt_task->is_hard > 0) && (larg->flags & arg0.rt_task->usp_flags_mask & FORCE_SOFT); return 0; } case GET_USP_FLG_MSK: { arg0.name = arg0.rt_task->usp_flags_mask; return arg0.ll; } case SET_USP_FLG_MSK: { task->usp_flags_mask = arg0.name; task->force_soft = (task->is_hard > 0) && (task->usp_flags & arg0.name & FORCE_SOFT); return 0; } case FORCE_TASK_SOFT: { extern void rt_do_force_soft(RT_TASK *rt_task); struct task_struct *ltsk; if ((ltsk = find_task_by_pid(arg0.name))) { if ((arg0.rt_task = ltsk->rtai_tskext(TSKEXT0))) { if ((arg0.rt_task->force_soft = (arg0.rt_task->is_hard != 0) && FORCE_SOFT)) { rt_do_force_soft(arg0.rt_task); } return arg0.ll; } } return 0; } case IS_HARD: { arg0.i = arg0.rt_task || (arg0.rt_task = current->rtai_tskext(TSKEXT0)) ? arg0.rt_task->is_hard : 0; return arg0.ll; } case GET_EXECTIME: { struct arg { RT_TASK *task; RTIME *exectime; }; if ((larg->task)->exectime[0] && (larg->task)->exectime[1]) { larg->exectime[0] = (larg->task)->exectime[0]; larg->exectime[1] = (larg->task)->exectime[1]; larg->exectime[2] = rtai_rdtsc(); } return 0; } case GET_TIMEORIG: { struct arg { RTIME *time_orig; }; if (larg->time_orig) { RTIME time_orig[2]; rt_gettimeorig(time_orig); rt_copy_to_user(larg->time_orig, time_orig, sizeof(time_orig)); } else { rt_gettimeorig(NULL); } return 0; } case LINUX_SERVER: { struct arg { struct linux_syscalls_list syscalls; }; if (larg->syscalls.nr) { if (larg->syscalls.task->linux_syscall_server) { RT_TASK *serv; rt_get_user(serv, &larg->syscalls.serv); rt_task_masked_unblock(serv, ~RT_SCHED_READY); } larg->syscalls.task->linux_syscall_server = larg->syscalls.serv; rtai_set_linux_task_priority(current, (larg->syscalls.task)->lnxtsk->policy, (larg->syscalls.task)->lnxtsk->rt_priority); arg0.rt_task = __task_init((unsigned long)larg->syscalls.task, larg->syscalls.task->base_priority >= BASE_SOFT_PRIORITY ? larg->syscalls.task->base_priority - BASE_SOFT_PRIORITY : larg->syscalls.task->base_priority, 0, 0, 1 << larg->syscalls.task->runnable_on_cpus); larg->syscalls.task->linux_syscall_server = arg0.rt_task; arg0.rt_task->linux_syscall_server = larg->syscalls.serv; return arg0.ll; } else { if (!larg->syscalls.task) { larg->syscalls.task = RT_CURRENT; } if ((arg0.rt_task = larg->syscalls.task->linux_syscall_server)) { larg->syscalls.task->linux_syscall_server = NULL; arg0.rt_task->suspdepth = -RTE_HIGERR; rt_task_masked_unblock(arg0.rt_task, ~RT_SCHED_READY); } } return 0; } default: { rt_printk("RTAI/LXRT: Unknown srq #%d\n", srq); arg0.i = -ENOSYS; return arg0.ll; } } return 0; }