diff options
Diffstat (limited to 'sys/dev/acpica/Osd/OsdSchedule.c')
-rw-r--r-- | sys/dev/acpica/Osd/OsdSchedule.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/sys/dev/acpica/Osd/OsdSchedule.c b/sys/dev/acpica/Osd/OsdSchedule.c new file mode 100644 index 000000000000..70717d5d6502 --- /dev/null +++ b/sys/dev/acpica/Osd/OsdSchedule.c @@ -0,0 +1,275 @@ +/*- + * Copyright (c) 2000 Michael Smith + * Copyright (c) 2000 BSDi + * Copyright (c) 2007-2009 Jung-uk Kim <jkim@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * 6.3 : Scheduling services + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_acpi.h" +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/interrupt.h> +#include <sys/kernel.h> +#include <sys/kthread.h> +#include <sys/malloc.h> +#include <sys/proc.h> +#include <sys/taskqueue.h> + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> + +#include <dev/acpica/acpivar.h> + +#define _COMPONENT ACPI_OS_SERVICES +ACPI_MODULE_NAME("SCHEDULE") + +/* + * Allow the user to tune the maximum number of tasks we may enqueue. + */ +static int acpi_max_tasks = ACPI_MAX_TASKS; +TUNABLE_INT("debug.acpi.max_tasks", &acpi_max_tasks); + +/* + * Allow the user to tune the number of task threads we start. It seems + * some systems have problems with increased parallelism. + */ +static int acpi_max_threads = ACPI_MAX_THREADS; +TUNABLE_INT("debug.acpi.max_threads", &acpi_max_threads); + +MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task"); + +struct acpi_task_ctx { + struct task at_task; + ACPI_OSD_EXEC_CALLBACK at_function; + void *at_context; + int at_flag; +#define ACPI_TASK_FREE 0 +#define ACPI_TASK_USED 1 +#define ACPI_TASK_ENQUEUED 2 +}; + +struct taskqueue *acpi_taskq; +static struct acpi_task_ctx *acpi_tasks; +static int acpi_task_count; +static int acpi_taskq_started; + +/* + * Preallocate some memory for tasks early enough. + * malloc(9) cannot be used with spin lock held. + */ +static void +acpi_task_init(void *arg) +{ + + acpi_tasks = malloc(sizeof(*acpi_tasks) * acpi_max_tasks, M_ACPITASK, + M_WAITOK | M_ZERO); +} + +SYSINIT(acpi_tasks, SI_SUB_DRIVERS, SI_ORDER_FIRST, acpi_task_init, NULL); + +/* + * Initialize ACPI task queue. + */ +static void +acpi_taskq_init(void *arg) +{ + int i; + + acpi_taskq = taskqueue_create_fast("acpi_task", M_NOWAIT, + &taskqueue_thread_enqueue, &acpi_taskq); + taskqueue_start_threads(&acpi_taskq, acpi_max_threads, PWAIT, "acpi_task"); + if (acpi_task_count > 0) { + if (bootverbose) + printf("AcpiOsExecute: enqueue %d pending tasks\n", + acpi_task_count); + for (i = 0; i < acpi_max_tasks; i++) + if (atomic_cmpset_int(&acpi_tasks[i].at_flag, ACPI_TASK_USED, + ACPI_TASK_USED | ACPI_TASK_ENQUEUED)) + taskqueue_enqueue(acpi_taskq, &acpi_tasks[i].at_task); + } + acpi_taskq_started = 1; +} + +SYSINIT(acpi_taskq, SI_SUB_CONFIGURE, SI_ORDER_SECOND, acpi_taskq_init, NULL); + +/* + * Bounce through this wrapper function since ACPI-CA doesn't understand + * the pending argument for its callbacks. + */ +static void +acpi_task_execute(void *context, int pending) +{ + struct acpi_task_ctx *at; + + at = (struct acpi_task_ctx *)context; + at->at_function(at->at_context); + atomic_clear_int(&at->at_flag, ACPI_TASK_USED | ACPI_TASK_ENQUEUED); + acpi_task_count--; +} + +static ACPI_STATUS +acpi_task_enqueue(int priority, ACPI_OSD_EXEC_CALLBACK Function, void *Context) +{ + struct acpi_task_ctx *at; + int i; + + for (at = NULL, i = 0; i < acpi_max_tasks; i++) + if (atomic_cmpset_int(&acpi_tasks[i].at_flag, ACPI_TASK_FREE, + ACPI_TASK_USED)) { + at = &acpi_tasks[i]; + acpi_task_count++; + break; + } + if (at == NULL) { + printf("AcpiOsExecute: failed to enqueue task, consider increasing " + "the debug.acpi.max_tasks tunable\n"); + return (AE_NO_MEMORY); + } + + TASK_INIT(&at->at_task, priority, acpi_task_execute, at); + at->at_function = Function; + at->at_context = Context; + + /* + * If the task queue is ready, enqueue it now. + */ + if (acpi_taskq_started) { + atomic_set_int(&at->at_flag, ACPI_TASK_ENQUEUED); + taskqueue_enqueue(acpi_taskq, &at->at_task); + return (AE_OK); + } + if (bootverbose) + printf("AcpiOsExecute: task queue not started\n"); + + return (AE_OK); +} + +/* + * This function may be called in interrupt context, i.e. when a GPE fires. + * We allocate and queue a task for one of our taskqueue threads to process. + */ +ACPI_STATUS +AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function, + void *Context) +{ + int pri; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + if (Function == NULL) + return_ACPI_STATUS (AE_BAD_PARAMETER); + + switch (Type) { + case OSL_GPE_HANDLER: + case OSL_NOTIFY_HANDLER: + /* + * Run GPEs and Notifies at the same priority. This allows + * Notifies that are generated by running a GPE's method (e.g., _L00) + * to not be pre-empted by a later GPE that arrives during the + * Notify handler execution. + */ + pri = 10; + break; + case OSL_GLOBAL_LOCK_HANDLER: + case OSL_EC_POLL_HANDLER: + case OSL_EC_BURST_HANDLER: + pri = 5; + break; + case OSL_DEBUGGER_THREAD: + pri = 0; + break; + default: + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + return_ACPI_STATUS (acpi_task_enqueue(pri, Function, Context)); +} + +void +AcpiOsSleep(UINT64 Milliseconds) +{ + int timo; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + timo = Milliseconds * hz / 1000; + + /* + * If requested sleep time is less than our hz resolution, use + * DELAY instead for better granularity. + */ + if (timo > 0) + pause("acpislp", timo); + else + DELAY(Milliseconds * 1000); + + return_VOID; +} + +/* + * Return the current time in 100 nanosecond units + */ +UINT64 +AcpiOsGetTimer(void) +{ + struct bintime bt; + UINT64 t; + + /* XXX During early boot there is no (decent) timer available yet. */ + if (cold) + panic("acpi: timer op not yet supported during boot"); + + binuptime(&bt); + t = ((UINT64)10000000 * (uint32_t)(bt.frac >> 32)) >> 32; + t += bt.sec * 10000000; + + return (t); +} + +void +AcpiOsStall(UINT32 Microseconds) +{ + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + DELAY(Microseconds); + return_VOID; +} + +ACPI_THREAD_ID +AcpiOsGetThreadId(void) +{ + + /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */ + + /* Returning 0 is not allowed. */ + return (curthread->td_tid); +} |