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isci: fix controller stop
1/ notify waiters when controller stop completes (fixes 10 second stall unloading the driver) 2/ make sure phy stop is after port and device stop Cc: Richard Boyd <richard.g.boyd@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
parent
abec912d71
commit
eb608c3cb3
@ -1046,7 +1046,7 @@ void isci_host_scan_start(struct Scsi_Host *shost)
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spin_unlock_irq(&ihost->scic_lock);
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}
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static void isci_host_stop_complete(struct isci_host *ihost, enum sci_status completion_status)
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static void isci_host_stop_complete(struct isci_host *ihost)
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{
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sci_controller_disable_interrupts(ihost);
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clear_bit(IHOST_STOP_PENDING, &ihost->flags);
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@ -1232,7 +1232,7 @@ static enum sci_status sci_controller_reset(struct isci_host *ihost)
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switch (ihost->sm.current_state_id) {
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case SCIC_RESET:
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case SCIC_READY:
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case SCIC_STOPPED:
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case SCIC_STOPPING:
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case SCIC_FAILED:
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/*
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* The reset operation is not a graceful cleanup, just
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@ -1247,6 +1247,44 @@ static enum sci_status sci_controller_reset(struct isci_host *ihost)
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}
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}
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static enum sci_status sci_controller_stop_phys(struct isci_host *ihost)
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{
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u32 index;
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enum sci_status status;
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enum sci_status phy_status;
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status = SCI_SUCCESS;
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for (index = 0; index < SCI_MAX_PHYS; index++) {
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phy_status = sci_phy_stop(&ihost->phys[index]);
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if (phy_status != SCI_SUCCESS &&
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phy_status != SCI_FAILURE_INVALID_STATE) {
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status = SCI_FAILURE;
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dev_warn(&ihost->pdev->dev,
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"%s: Controller stop operation failed to stop "
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"phy %d because of status %d.\n",
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__func__,
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ihost->phys[index].phy_index, phy_status);
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}
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}
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return status;
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}
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/**
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* isci_host_deinit - shutdown frame reception and dma
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* @ihost: host to take down
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*
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* This is called in either the driver shutdown or the suspend path. In
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* the shutdown case libsas went through port teardown and normal device
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* removal (i.e. physical links stayed up to service scsi_device removal
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* commands). In the suspend case we disable the hardware without
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* notifying libsas of the link down events since we want libsas to
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* remember the domain across the suspend/resume cycle
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*/
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void isci_host_deinit(struct isci_host *ihost)
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{
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int i;
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@ -1255,16 +1293,6 @@ void isci_host_deinit(struct isci_host *ihost)
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for (i = 0; i < isci_gpio_count(ihost); i++)
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writel(SGPIO_HW_CONTROL, &ihost->scu_registers->peg0.sgpio.output_data_select[i]);
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for (i = 0; i < SCI_MAX_PORTS; i++) {
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struct isci_port *iport = &ihost->ports[i];
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struct isci_remote_device *idev, *d;
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list_for_each_entry_safe(idev, d, &iport->remote_dev_list, node) {
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if (test_bit(IDEV_ALLOCATED, &idev->flags))
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isci_remote_device_stop(ihost, idev);
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}
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}
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set_bit(IHOST_STOP_PENDING, &ihost->flags);
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spin_lock_irq(&ihost->scic_lock);
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@ -1273,6 +1301,13 @@ void isci_host_deinit(struct isci_host *ihost)
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wait_for_stop(ihost);
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/* phy stop is after controller stop to allow port and device to
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* go idle before shutting down the phys, but the expectation is
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* that i/o has been shut off well before we reach this
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* function.
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*/
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sci_controller_stop_phys(ihost);
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/* disable sgpio: where the above wait should give time for the
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* enclosure to sample the gpios going inactive
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*/
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@ -1476,32 +1511,6 @@ static void sci_controller_ready_state_exit(struct sci_base_state_machine *sm)
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sci_controller_set_interrupt_coalescence(ihost, 0, 0);
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}
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static enum sci_status sci_controller_stop_phys(struct isci_host *ihost)
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{
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u32 index;
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enum sci_status status;
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enum sci_status phy_status;
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status = SCI_SUCCESS;
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for (index = 0; index < SCI_MAX_PHYS; index++) {
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phy_status = sci_phy_stop(&ihost->phys[index]);
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if (phy_status != SCI_SUCCESS &&
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phy_status != SCI_FAILURE_INVALID_STATE) {
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status = SCI_FAILURE;
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dev_warn(&ihost->pdev->dev,
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"%s: Controller stop operation failed to stop "
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"phy %d because of status %d.\n",
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__func__,
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ihost->phys[index].phy_index, phy_status);
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}
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}
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return status;
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}
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static enum sci_status sci_controller_stop_ports(struct isci_host *ihost)
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{
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u32 index;
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@ -1561,10 +1570,11 @@ static void sci_controller_stopping_state_enter(struct sci_base_state_machine *s
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{
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struct isci_host *ihost = container_of(sm, typeof(*ihost), sm);
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/* Stop all of the components for this controller */
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sci_controller_stop_phys(ihost);
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sci_controller_stop_ports(ihost);
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sci_controller_stop_devices(ihost);
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sci_controller_stop_ports(ihost);
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if (!sci_controller_has_remote_devices_stopping(ihost))
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isci_host_stop_complete(ihost);
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}
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static void sci_controller_stopping_state_exit(struct sci_base_state_machine *sm)
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@ -1621,7 +1631,6 @@ static const struct sci_base_state sci_controller_state_table[] = {
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.enter_state = sci_controller_stopping_state_enter,
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.exit_state = sci_controller_stopping_state_exit,
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},
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[SCIC_STOPPED] = {},
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[SCIC_FAILED] = {}
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};
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@ -1641,7 +1650,7 @@ static void controller_timeout(unsigned long data)
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sci_controller_transition_to_ready(ihost, SCI_FAILURE_TIMEOUT);
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else if (sm->current_state_id == SCIC_STOPPING) {
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sci_change_state(sm, SCIC_FAILED);
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isci_host_stop_complete(ihost, SCI_FAILURE_TIMEOUT);
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isci_host_stop_complete(ihost);
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} else /* / @todo Now what do we want to do in this case? */
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dev_err(&ihost->pdev->dev,
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"%s: Controller timer fired when controller was not "
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@ -2452,7 +2461,7 @@ void sci_controller_link_down(struct isci_host *ihost, struct isci_port *iport,
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}
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}
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static bool sci_controller_has_remote_devices_stopping(struct isci_host *ihost)
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bool sci_controller_has_remote_devices_stopping(struct isci_host *ihost)
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{
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u32 index;
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@ -2478,7 +2487,7 @@ void sci_controller_remote_device_stopped(struct isci_host *ihost,
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}
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if (!sci_controller_has_remote_devices_stopping(ihost))
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sci_change_state(&ihost->sm, SCIC_STOPPED);
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isci_host_stop_complete(ihost);
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}
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void sci_controller_post_request(struct isci_host *ihost, u32 request)
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@ -276,13 +276,6 @@ enum sci_controller_states {
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*/
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SCIC_STOPPING,
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/**
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* This state indicates that the controller has successfully been stopped.
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* In this state no new IO operations are permitted.
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* This state is entered from the STOPPING state.
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*/
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SCIC_STOPPED,
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/**
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* This state indicates that the controller could not successfully be
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* initialized. In this state no new IO operations are permitted.
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@ -479,6 +472,7 @@ int isci_host_init(struct isci_host *);
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void isci_host_completion_routine(unsigned long data);
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void isci_host_deinit(struct isci_host *);
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void sci_controller_disable_interrupts(struct isci_host *ihost);
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bool sci_controller_has_remote_devices_stopping(struct isci_host *ihost);
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enum sci_status sci_controller_start_io(
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struct isci_host *ihost,
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