/*- * BSD LICENSE * * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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 COPYRIGHT HOLDERS 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 COPYRIGHT * OWNER 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. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include void isci_interrupt_legacy_handler(void *arg); void isci_interrupt_msix_handler(void *arg); static int isci_interrupt_setup_legacy(struct isci_softc *isci) { struct ISCI_INTERRUPT_INFO *interrupt_info = &isci->interrupt_info[0]; isci->num_interrupts = 1; scic_controller_get_handler_methods(SCIC_LEGACY_LINE_INTERRUPT_TYPE, 0, &isci->handlers[0]); interrupt_info->handlers = &isci->handlers[0]; interrupt_info->rid = 0; interrupt_info->interrupt_target_handle = (void *)isci; interrupt_info->res = bus_alloc_resource_any(isci->device, SYS_RES_IRQ, &interrupt_info->rid, RF_SHAREABLE|RF_ACTIVE); if (interrupt_info->res == NULL) { isci_log_message(0, "ISCI", "bus_alloc_resource failed\n"); return (-1); } interrupt_info->tag = NULL; if (bus_setup_intr(isci->device, interrupt_info->res, INTR_TYPE_CAM | INTR_MPSAFE, NULL, isci_interrupt_legacy_handler, interrupt_info, &interrupt_info->tag)) { isci_log_message(0, "ISCI", "bus_setup_intr failed\n"); return (-1); } return (0); } static int isci_interrupt_setup_msix(struct isci_softc *isci) { uint32_t controller_index; scic_controller_get_handler_methods(SCIC_MSIX_INTERRUPT_TYPE, SCI_MAX_MSIX_MESSAGES_PER_CONTROLLER, &isci->handlers[0]); for (controller_index = 0; controller_index < isci->controller_count; controller_index++) { uint32_t msix_index; uint8_t base_index = controller_index * SCI_MAX_MSIX_MESSAGES_PER_CONTROLLER; for (msix_index = 0; msix_index < SCI_MAX_MSIX_MESSAGES_PER_CONTROLLER; msix_index++) { struct ISCI_INTERRUPT_INFO *info = &isci->interrupt_info[base_index+msix_index]; info->handlers = &isci->handlers[msix_index]; info->interrupt_target_handle = &isci->controllers[controller_index]; info->rid = base_index+msix_index+1; info->res = bus_alloc_resource_any(isci->device, SYS_RES_IRQ, &info->rid, RF_ACTIVE); if (info->res == NULL) { isci_log_message(0, "ISCI", "bus_alloc_resource failed\n"); return (-1); } info->tag = NULL; if (bus_setup_intr(isci->device, info->res, INTR_TYPE_CAM | INTR_MPSAFE, NULL, isci_interrupt_msix_handler, info, &info->tag)) { isci_log_message(0, "ISCI", "bus_setup_intr failed\n"); return (-1); } } } return (0); } void isci_interrupt_setup(struct isci_softc *isci) { uint8_t max_msix_messages = SCI_MAX_MSIX_MESSAGES_PER_CONTROLLER * isci->controller_count; BOOL use_msix = FALSE; uint32_t force_legacy_interrupts = 0; TUNABLE_INT_FETCH("hw.isci.force_legacy_interrupts", &force_legacy_interrupts); if (!force_legacy_interrupts && pci_msix_count(isci->device) >= max_msix_messages) { isci->num_interrupts = max_msix_messages; pci_alloc_msix(isci->device, &isci->num_interrupts); if (isci->num_interrupts == max_msix_messages) use_msix = TRUE; } if (use_msix == TRUE) isci_interrupt_setup_msix(isci); else isci_interrupt_setup_legacy(isci); } void isci_interrupt_legacy_handler(void *arg) { struct ISCI_INTERRUPT_INFO *interrupt_info = (struct ISCI_INTERRUPT_INFO *)arg; struct isci_softc *isci = (struct isci_softc *)interrupt_info->interrupt_target_handle; SCIC_CONTROLLER_INTERRUPT_HANDLER interrupt_handler; SCIC_CONTROLLER_COMPLETION_HANDLER completion_handler; int index; interrupt_handler = interrupt_info->handlers->interrupt_handler; completion_handler = interrupt_info->handlers->completion_handler; for (index = 0; index < isci->controller_count; index++) { struct ISCI_CONTROLLER *controller = &isci->controllers[index]; /* If controller_count > 0, we will get interrupts here for * controller 0 before controller 1 has even started. So * we need to make sure we don't call the completion handler * for a non-started controller. */ if (controller->is_started == TRUE) { SCI_CONTROLLER_HANDLE_T scic_controller_handle = scif_controller_get_scic_handle( controller->scif_controller_handle); if (interrupt_handler(scic_controller_handle)) { mtx_lock(&controller->lock); completion_handler(scic_controller_handle); mtx_unlock(&controller->lock); } } } } void isci_interrupt_msix_handler(void *arg) { struct ISCI_INTERRUPT_INFO *interrupt_info = (struct ISCI_INTERRUPT_INFO *)arg; struct ISCI_CONTROLLER *controller = (struct ISCI_CONTROLLER *)interrupt_info->interrupt_target_handle; SCIC_CONTROLLER_INTERRUPT_HANDLER interrupt_handler; SCIC_CONTROLLER_COMPLETION_HANDLER completion_handler; interrupt_handler = interrupt_info->handlers->interrupt_handler; completion_handler = interrupt_info->handlers->completion_handler; SCI_CONTROLLER_HANDLE_T scic_controller_handle; scic_controller_handle = scif_controller_get_scic_handle( controller->scif_controller_handle); if (interrupt_handler(scic_controller_handle)) { mtx_lock(&controller->lock); completion_handler(scic_controller_handle); mtx_unlock(&controller->lock); } } void isci_interrupt_poll_handler(struct ISCI_CONTROLLER *controller) { SCI_CONTROLLER_HANDLE_T scic_controller = scif_controller_get_scic_handle(controller->scif_controller_handle); SCIC_CONTROLLER_HANDLER_METHODS_T handlers; scic_controller_get_handler_methods(SCIC_NO_INTERRUPTS, 0x0, &handlers); if(handlers.interrupt_handler(scic_controller) == TRUE) { /* Do not acquire controller lock in this path. xpt * poll routine will get called with this lock already * held, so we can't acquire it again here. Other users * of this function must acquire the lock explicitly * before calling this handler. */ handlers.completion_handler(scic_controller); } }