static void EcGpeQueryHandler(void *Context) { struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context; UINT8 Data; ACPI_STATUS Status; int retry, sci_enqueued; char qxx[5]; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); KASSERT(Context != NULL, ("EcGpeQueryHandler called with NULL")); /* Serialize user access with EcSpaceHandler(). */ Status = EcLock(sc); if (ACPI_FAILURE(Status)) { device_printf(sc->ec_dev, "GpeQuery lock error: %s\n", AcpiFormatException(Status)); return; } /* * Send a query command to the EC to find out which _Qxx call it * wants to make. This command clears the SCI bit and also the * interrupt source since we are edge-triggered. To prevent the GPE * that may arise from running the query from causing another query * to be queued, we clear the pending flag only after running it. */ sci_enqueued = sc->ec_sci_pend; for (retry = 0; retry < 2; retry++) { Status = EcCommand(sc, EC_COMMAND_QUERY); if (ACPI_SUCCESS(Status)) break; if (EcCheckStatus(sc, "retr_check", EC_EVENT_INPUT_BUFFER_EMPTY) == AE_OK) continue; else break; } sc->ec_sci_pend = FALSE; if (ACPI_FAILURE(Status)) { EcUnlock(sc); device_printf(sc->ec_dev, "GPE query failed: %s\n", AcpiFormatException(Status)); return; } Data = EC_GET_DATA(sc); /* * We have to unlock before running the _Qxx method below since that * method may attempt to read/write from EC address space, causing * recursive acquisition of the lock. */ EcUnlock(sc); /* Ignore the value for "no outstanding event". (13.3.5) */ if (Data == 0) return; /* Evaluate _Qxx to respond to the controller. */ ksnprintf(qxx, sizeof(qxx), "_Q%02X", Data); AcpiUtStrupr(qxx); Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL); if (ACPI_FAILURE(Status) && Status != AE_NOT_FOUND) { device_printf(sc->ec_dev, "evaluation of query method %s failed: %s\n", qxx, AcpiFormatException(Status)); } /* Reenable runtime GPE if its execution was deferred. */ if (sci_enqueued) { Status = AcpiFinishGpe(sc->ec_gpehandle, sc->ec_gpebit); if (ACPI_FAILURE(Status)) device_printf(sc->ec_dev, "reenabling runtime GPE failed: %s\n", AcpiFormatException(Status)); } }
status_t finish_gpe(acpi_handle handle, uint32 gpeNumber) { return AcpiFinishGpe(handle, gpeNumber) == AE_OK ? B_OK : B_ERROR; }