2012-01-31 19:38:18 +00:00
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/*-
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <dev/isci/isci.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/isci/scil/scif_controller.h>
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void isci_interrupt_legacy_handler(void *arg);
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void isci_interrupt_msix_handler(void *arg);
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static int
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isci_interrupt_setup_legacy(struct isci_softc *isci)
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{
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struct ISCI_INTERRUPT_INFO *interrupt_info = &isci->interrupt_info[0];
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isci->num_interrupts = 1;
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scic_controller_get_handler_methods(SCIC_LEGACY_LINE_INTERRUPT_TYPE,
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0, &isci->handlers[0]);
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interrupt_info->handlers = &isci->handlers[0];
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interrupt_info->rid = 0;
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interrupt_info->interrupt_target_handle = (void *)isci;
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interrupt_info->res = bus_alloc_resource_any(isci->device, SYS_RES_IRQ,
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&interrupt_info->rid, RF_SHAREABLE|RF_ACTIVE);
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if (interrupt_info->res == NULL) {
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isci_log_message(0, "ISCI", "bus_alloc_resource failed\n");
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return (-1);
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}
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interrupt_info->tag = NULL;
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if (bus_setup_intr(isci->device, interrupt_info->res,
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INTR_TYPE_CAM | INTR_MPSAFE, NULL, isci_interrupt_legacy_handler,
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interrupt_info, &interrupt_info->tag)) {
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isci_log_message(0, "ISCI", "bus_setup_intr failed\n");
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return (-1);
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}
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return (0);
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}
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static int
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isci_interrupt_setup_msix(struct isci_softc *isci)
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{
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uint32_t controller_index;
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scic_controller_get_handler_methods(SCIC_MSIX_INTERRUPT_TYPE,
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SCI_MAX_MSIX_MESSAGES_PER_CONTROLLER, &isci->handlers[0]);
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for (controller_index = 0; controller_index < isci->controller_count;
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controller_index++) {
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uint32_t msix_index;
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uint8_t base_index = controller_index *
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SCI_MAX_MSIX_MESSAGES_PER_CONTROLLER;
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for (msix_index = 0; msix_index < SCI_MAX_MSIX_MESSAGES_PER_CONTROLLER;
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msix_index++) {
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struct ISCI_INTERRUPT_INFO *info =
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&isci->interrupt_info[base_index+msix_index];
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info->handlers = &isci->handlers[msix_index];
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info->interrupt_target_handle =
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&isci->controllers[controller_index];
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info->rid = base_index+msix_index+1;
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info->res = bus_alloc_resource_any(isci->device,
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SYS_RES_IRQ, &info->rid, RF_ACTIVE);
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if (info->res == NULL) {
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isci_log_message(0, "ISCI",
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"bus_alloc_resource failed\n");
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return (-1);
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}
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info->tag = NULL;
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if (bus_setup_intr(isci->device, info->res,
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INTR_TYPE_CAM | INTR_MPSAFE, NULL,
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isci_interrupt_msix_handler, info, &info->tag)) {
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isci_log_message(0, "ISCI",
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"bus_setup_intr failed\n");
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return (-1);
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}
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}
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}
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return (0);
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}
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void
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isci_interrupt_setup(struct isci_softc *isci)
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{
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uint8_t max_msix_messages = SCI_MAX_MSIX_MESSAGES_PER_CONTROLLER *
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isci->controller_count;
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BOOL use_msix = FALSE;
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uint32_t force_legacy_interrupts = 0;
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TUNABLE_INT_FETCH("hw.isci.force_legacy_interrupts",
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&force_legacy_interrupts);
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if (!force_legacy_interrupts &&
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pci_msix_count(isci->device) >= max_msix_messages) {
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isci->num_interrupts = max_msix_messages;
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pci_alloc_msix(isci->device, &isci->num_interrupts);
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if (isci->num_interrupts == max_msix_messages)
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use_msix = TRUE;
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}
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if (use_msix == TRUE)
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isci_interrupt_setup_msix(isci);
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else
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isci_interrupt_setup_legacy(isci);
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}
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void
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isci_interrupt_legacy_handler(void *arg)
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{
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struct ISCI_INTERRUPT_INFO *interrupt_info =
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(struct ISCI_INTERRUPT_INFO *)arg;
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struct isci_softc *isci =
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(struct isci_softc *)interrupt_info->interrupt_target_handle;
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SCIC_CONTROLLER_INTERRUPT_HANDLER interrupt_handler;
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SCIC_CONTROLLER_COMPLETION_HANDLER completion_handler;
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int index;
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interrupt_handler = interrupt_info->handlers->interrupt_handler;
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completion_handler = interrupt_info->handlers->completion_handler;
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for (index = 0; index < isci->controller_count; index++) {
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struct ISCI_CONTROLLER *controller = &isci->controllers[index];
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/* If controller_count > 0, we will get interrupts here for
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* controller 0 before controller 1 has even started. So
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* we need to make sure we don't call the completion handler
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* for a non-started controller.
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*/
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if (controller->is_started == TRUE) {
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SCI_CONTROLLER_HANDLE_T scic_controller_handle =
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scif_controller_get_scic_handle(
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controller->scif_controller_handle);
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if (interrupt_handler(scic_controller_handle)) {
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mtx_lock(&controller->lock);
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completion_handler(scic_controller_handle);
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2012-05-21 22:54:33 +00:00
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if (controller->release_queued_ccbs == TRUE)
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isci_controller_release_queued_ccbs(
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controller);
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2012-01-31 19:38:18 +00:00
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mtx_unlock(&controller->lock);
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}
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}
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}
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}
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void
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isci_interrupt_msix_handler(void *arg)
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{
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struct ISCI_INTERRUPT_INFO *interrupt_info =
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(struct ISCI_INTERRUPT_INFO *)arg;
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struct ISCI_CONTROLLER *controller =
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(struct ISCI_CONTROLLER *)interrupt_info->interrupt_target_handle;
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SCIC_CONTROLLER_INTERRUPT_HANDLER interrupt_handler;
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SCIC_CONTROLLER_COMPLETION_HANDLER completion_handler;
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interrupt_handler = interrupt_info->handlers->interrupt_handler;
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completion_handler = interrupt_info->handlers->completion_handler;
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SCI_CONTROLLER_HANDLE_T scic_controller_handle;
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scic_controller_handle = scif_controller_get_scic_handle(
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controller->scif_controller_handle);
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if (interrupt_handler(scic_controller_handle)) {
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mtx_lock(&controller->lock);
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completion_handler(scic_controller_handle);
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2012-05-21 22:54:33 +00:00
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/*
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* isci_controller_release_queued_ccb() is a relatively
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* expensive routine, so we don't call it until the controller
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* level flag is set to TRUE.
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*/
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if (controller->release_queued_ccbs == TRUE)
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isci_controller_release_queued_ccbs(controller);
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2012-01-31 19:38:18 +00:00
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mtx_unlock(&controller->lock);
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}
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}
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void
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isci_interrupt_poll_handler(struct ISCI_CONTROLLER *controller)
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{
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SCI_CONTROLLER_HANDLE_T scic_controller =
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scif_controller_get_scic_handle(controller->scif_controller_handle);
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SCIC_CONTROLLER_HANDLER_METHODS_T handlers;
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scic_controller_get_handler_methods(SCIC_NO_INTERRUPTS, 0x0, &handlers);
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if(handlers.interrupt_handler(scic_controller) == TRUE) {
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/* Do not acquire controller lock in this path. xpt
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* poll routine will get called with this lock already
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* held, so we can't acquire it again here. Other users
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* of this function must acquire the lock explicitly
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* before calling this handler.
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*/
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handlers.completion_handler(scic_controller);
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}
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}
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