/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <dev/isci/isci.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/isci/scil/scif_controller.h>
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;
if (pci_alloc_msix(isci->device, &isci->num_interrupts) == 0 &&
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);
if (controller->release_queued_ccbs == TRUE)
isci_controller_release_queued_ccbs(
controller);
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);
/*
* isci_controller_release_queued_ccb() is a relatively
* expensive routine, so we don't call it until the controller
* level flag is set to TRUE.
*/
if (controller->release_queued_ccbs == TRUE)
isci_controller_release_queued_ccbs(controller);
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);
}
}
