3da2a91a57
reset device task request from the driver. If the drive fails to respond with a signature FIS, the driver would previously get into an endless retry loop, stalling all I/O to the drive and keeping user processes stranded. Instead, fail the i/o and invalidate the device if the task management command times out. This is controllable with the sysctl and tunable hw.isci.fail_on_task_timeout dev.isci.0.fail_on_task_timeout The default for these is 1. Reviewed by: jimharris Obtained from: Netflix, Inc. MFC after: 2 days
287 lines
8.5 KiB
C
287 lines
8.5 KiB
C
/*-
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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 <sys/sysctl.h>
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#include <dev/isci/scil/scif_controller.h>
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#include <dev/isci/scil/scic_phy.h>
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static int
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isci_sysctl_coalesce_timeout(SYSCTL_HANDLER_ARGS)
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{
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struct isci_softc *isci = (struct isci_softc *)arg1;
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int error = sysctl_handle_int(oidp, &isci->coalesce_timeout, 0, req);
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int i;
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if (error)
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return (error);
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for (i = 0; i < isci->controller_count; i++)
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scif_controller_set_interrupt_coalescence(
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isci->controllers[i].scif_controller_handle,
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isci->coalesce_number, isci->coalesce_timeout);
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return (0);
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}
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static int
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isci_sysctl_coalesce_number(SYSCTL_HANDLER_ARGS)
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{
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struct isci_softc *isci = (struct isci_softc *)arg1;
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int error = sysctl_handle_int(oidp, &isci->coalesce_number, 0, req);
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int i;
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if (error)
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return (error);
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for (i = 0; i < isci->controller_count; i++)
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scif_controller_set_interrupt_coalescence(
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isci->controllers[i].scif_controller_handle,
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isci->coalesce_number, isci->coalesce_timeout);
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return (0);
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}
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static void
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isci_sysctl_reset_remote_devices(struct ISCI_CONTROLLER *controller,
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uint32_t remote_devices_to_be_reset)
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{
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uint32_t i = 0;
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while (remote_devices_to_be_reset != 0) {
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if (remote_devices_to_be_reset & 0x1) {
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struct ISCI_REMOTE_DEVICE *remote_device =
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controller->remote_device[i];
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if (remote_device != NULL) {
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mtx_lock(&controller->lock);
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isci_remote_device_reset(remote_device, NULL);
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mtx_unlock(&controller->lock);
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}
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}
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remote_devices_to_be_reset >>= 1;
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i++;
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}
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}
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static int
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isci_sysctl_reset_remote_device_on_controller0(SYSCTL_HANDLER_ARGS)
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{
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struct isci_softc *isci = (struct isci_softc *)arg1;
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uint32_t remote_devices_to_be_reset = 0;
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struct ISCI_CONTROLLER *controller = &isci->controllers[0];
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int error = sysctl_handle_int(oidp, &remote_devices_to_be_reset, 0, req);
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if (error || remote_devices_to_be_reset == 0)
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return (error);
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isci_sysctl_reset_remote_devices(controller, remote_devices_to_be_reset);
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return (0);
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}
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static int
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isci_sysctl_reset_remote_device_on_controller1(SYSCTL_HANDLER_ARGS)
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{
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struct isci_softc *isci = (struct isci_softc *)arg1;
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uint32_t remote_devices_to_be_reset = 0;
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struct ISCI_CONTROLLER *controller = &isci->controllers[1];
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int error =
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sysctl_handle_int(oidp, &remote_devices_to_be_reset, 0, req);
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if (error || remote_devices_to_be_reset == 0)
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return (error);
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isci_sysctl_reset_remote_devices(controller,
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remote_devices_to_be_reset);
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return (0);
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}
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static void
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isci_sysctl_stop(struct ISCI_CONTROLLER *controller, uint32_t phy_to_be_stopped)
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{
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SCI_PHY_HANDLE_T phy_handle = NULL;
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scic_controller_get_phy_handle(
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scif_controller_get_scic_handle(controller->scif_controller_handle),
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phy_to_be_stopped, &phy_handle);
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scic_phy_stop(phy_handle);
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}
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static int
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isci_sysctl_stop_phy(SYSCTL_HANDLER_ARGS)
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{
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struct isci_softc *isci = (struct isci_softc *)arg1;
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uint32_t phy_to_be_stopped = 0xff;
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uint32_t controller_index, phy_index;
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int error = sysctl_handle_int(oidp, &phy_to_be_stopped, 0, req);
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controller_index = phy_to_be_stopped / SCI_MAX_PHYS;
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phy_index = phy_to_be_stopped % SCI_MAX_PHYS;
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if(error || controller_index >= isci->controller_count)
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return (error);
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isci_sysctl_stop(&isci->controllers[controller_index], phy_index);
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return (0);
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}
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static void
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isci_sysctl_start(struct ISCI_CONTROLLER *controller,
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uint32_t phy_to_be_started)
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{
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SCI_PHY_HANDLE_T phy_handle = NULL;
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scic_controller_get_phy_handle(
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scif_controller_get_scic_handle(controller->scif_controller_handle),
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phy_to_be_started, &phy_handle);
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scic_phy_start(phy_handle);
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}
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static int
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isci_sysctl_start_phy(SYSCTL_HANDLER_ARGS)
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{
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struct isci_softc *isci = (struct isci_softc *)arg1;
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uint32_t phy_to_be_started = 0xff;
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uint32_t controller_index, phy_index;
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int error = sysctl_handle_int(oidp, &phy_to_be_started, 0, req);
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controller_index = phy_to_be_started / SCI_MAX_PHYS;
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phy_index = phy_to_be_started % SCI_MAX_PHYS;
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if(error || controller_index >= isci->controller_count)
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return error;
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isci_sysctl_start(&isci->controllers[controller_index], phy_index);
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return 0;
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}
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static int
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isci_sysctl_log_frozen_lun_masks(SYSCTL_HANDLER_ARGS)
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{
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struct isci_softc *isci = (struct isci_softc *)arg1;
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struct ISCI_REMOTE_DEVICE *device;
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int32_t log_frozen_devices = 0;
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int error, i, j;
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error = sysctl_handle_int(oidp, &log_frozen_devices, 0, req);
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if (error || log_frozen_devices == 0)
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return (error);
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for (i = 0; i < isci->controller_count; i++) {
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for (j = 0; j < SCI_MAX_REMOTE_DEVICES; j++) {
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device = isci->controllers[i].remote_device[j];
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if (device == NULL)
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continue;
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device_printf(isci->device,
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"controller %d device %3d frozen_lun_mask 0x%02x\n",
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i, j, device->frozen_lun_mask);
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}
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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_sysctl_fail_on_task_timeout(SYSCTL_HANDLER_ARGS)
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{
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struct isci_softc *isci = (struct isci_softc *)arg1;
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int32_t fail_on_timeout = 0;
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int error, i;
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error = sysctl_handle_int(oidp, &fail_on_timeout, 0, req);
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if (error || fail_on_timeout == 0)
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return (error);
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for (i = 0; i < isci->controller_count; i++)
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isci->controllers[i].fail_on_task_timeout = fail_on_timeout;
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return (0);
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}
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void isci_sysctl_initialize(struct isci_softc *isci)
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{
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struct sysctl_ctx_list *sysctl_ctx = device_get_sysctl_ctx(isci->device);
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struct sysctl_oid *sysctl_tree = device_get_sysctl_tree(isci->device);
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SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"coalesce_timeout", CTLTYPE_UINT | CTLFLAG_RW, isci, 0,
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isci_sysctl_coalesce_timeout, "IU",
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"Interrupt coalescing timeout (in microseconds)");
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SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"coalesce_number", CTLTYPE_UINT | CTLFLAG_RW, isci, 0,
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isci_sysctl_coalesce_number, "IU",
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"Interrupt coalescing number");
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SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"reset_remote_device_on_controller0", CTLTYPE_UINT| CTLFLAG_RW,
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isci, 0, isci_sysctl_reset_remote_device_on_controller0, "IU",
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"Reset remote device on controller 0");
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SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"reset_remote_device_on_controller1", CTLTYPE_UINT| CTLFLAG_RW,
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isci, 0, isci_sysctl_reset_remote_device_on_controller1, "IU",
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"Reset remote device on controller 1");
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SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"stop_phy", CTLTYPE_UINT| CTLFLAG_RW, isci, 0, isci_sysctl_stop_phy,
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"IU", "Stop PHY on a controller");
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SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"start_phy", CTLTYPE_UINT| CTLFLAG_RW, isci, 0,
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isci_sysctl_start_phy, "IU", "Start PHY on a controller");
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SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"log_frozen_lun_masks", CTLTYPE_UINT| CTLFLAG_RW, isci, 0,
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isci_sysctl_log_frozen_lun_masks, "IU",
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"Log frozen lun masks to kernel log");
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SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO,
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"fail_on_task_timeout", CTLTYPE_UINT | CTLFLAG_RW, isci, 0,
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isci_sysctl_fail_on_task_timeout, "IU",
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"Fail a command that has encountered a task management timeout");
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}
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