854c31980e
Certain VM guest types (VMware, Xen) do not support MSI, so pci_alloc_msix() always fails. isci(4) was not properly detecting the allocation failure, and would try to proceed with MSIx resource initialization rather than reverting to INTx. Reported and tested by: Bradley W. Dutton (brad-fbsd-stable@duttonbros.com) MFC after: 3 days Sponsored by: Intel
240 lines
7.5 KiB
C
240 lines
7.5 KiB
C
/*-
|
|
* 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);
|
|
}
|
|
}
|