Lines Matching refs:ctrl
48 static inline struct pci_dev *ctrl_dev(struct controller *ctrl)
50 return ctrl->pcie->port;
57 static inline int pciehp_request_irq(struct controller *ctrl)
59 int retval, irq = ctrl->pcie->irq;
62 ctrl->poll_thread = kthread_run(&pciehp_poll, ctrl,
64 slot_name(ctrl));
65 return PTR_ERR_OR_ZERO(ctrl->poll_thread);
70 IRQF_SHARED, "pciehp", ctrl);
72 ctrl_err(ctrl, "Cannot get irq %d for the hotplug controller\n",
77 static inline void pciehp_free_irq(struct controller *ctrl)
80 kthread_stop(ctrl->poll_thread);
82 free_irq(ctrl->pcie->irq, ctrl);
85 static int pcie_poll_cmd(struct controller *ctrl, int timeout)
87 struct pci_dev *pdev = ctrl_dev(ctrl);
93 ctrl_info(ctrl, "%s: no response from device\n",
101 ctrl->cmd_busy = 0;
111 static void pcie_wait_cmd(struct controller *ctrl)
115 unsigned long cmd_timeout = ctrl->cmd_started + duration;
123 if (NO_CMD_CMPL(ctrl))
126 if (!ctrl->cmd_busy)
139 if (ctrl->slot_ctrl & PCI_EXP_SLTCTL_HPIE &&
140 ctrl->slot_ctrl & PCI_EXP_SLTCTL_CCIE)
141 rc = wait_event_timeout(ctrl->queue, !ctrl->cmd_busy, timeout);
143 rc = pcie_poll_cmd(ctrl, jiffies_to_msecs(timeout));
146 ctrl_info(ctrl, "Timeout on hotplug command %#06x (issued %u msec ago)\n",
147 ctrl->slot_ctrl,
148 jiffies_to_msecs(jiffies - ctrl->cmd_started));
156 static void pcie_do_write_cmd(struct controller *ctrl, u16 cmd,
159 struct pci_dev *pdev = ctrl_dev(ctrl);
162 mutex_lock(&ctrl->ctrl_lock);
167 pcie_wait_cmd(ctrl);
171 ctrl_info(ctrl, "%s: no response from device\n", __func__);
178 ctrl->cmd_busy = 1;
180 ctrl->slot_ctrl = slot_ctrl;
182 ctrl->cmd_started = jiffies;
193 ctrl->cmd_busy = 0;
200 pcie_wait_cmd(ctrl);
203 mutex_unlock(&ctrl->ctrl_lock);
208 * @ctrl: controller to which the command is issued
212 static void pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask)
214 pcie_do_write_cmd(ctrl, cmd, mask, true);
218 static void pcie_write_cmd_nowait(struct controller *ctrl, u16 cmd, u16 mask)
220 pcie_do_write_cmd(ctrl, cmd, mask, false);
225 * @ctrl: PCIe hotplug controller
234 int pciehp_check_link_active(struct controller *ctrl)
236 struct pci_dev *pdev = ctrl_dev(ctrl);
245 ctrl_dbg(ctrl, "%s: lnk_status = %x\n", __func__, lnk_status);
290 int pciehp_check_link_status(struct controller *ctrl)
292 struct pci_dev *pdev = ctrl_dev(ctrl);
297 ctrl_info(ctrl, "Slot(%s): No link\n", slot_name(ctrl));
301 if (ctrl->inband_presence_disabled)
304 found = pci_bus_check_dev(ctrl->pcie->port->subordinate,
310 &ctrl->pending_events);
313 ctrl_dbg(ctrl, "%s: lnk_status = %x\n", __func__, lnk_status);
316 ctrl_info(ctrl, "Slot(%s): Cannot train link: status %#06x\n",
317 slot_name(ctrl), lnk_status);
321 pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status);
324 ctrl_info(ctrl, "Slot(%s): No device found\n",
325 slot_name(ctrl));
332 static int __pciehp_link_set(struct controller *ctrl, bool enable)
334 struct pci_dev *pdev = ctrl_dev(ctrl);
343 static int pciehp_link_enable(struct controller *ctrl)
345 return __pciehp_link_set(ctrl, true);
351 struct controller *ctrl = to_ctrl(hotplug_slot);
352 struct pci_dev *pdev = ctrl_dev(ctrl);
364 struct controller *ctrl = to_ctrl(hotplug_slot);
365 struct pci_dev *pdev = ctrl_dev(ctrl);
371 ctrl_dbg(ctrl, "%s: SLOTCTRL %x, value read %x\n", __func__,
372 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_ctrl);
392 void pciehp_get_power_status(struct controller *ctrl, u8 *status)
394 struct pci_dev *pdev = ctrl_dev(ctrl);
398 ctrl_dbg(ctrl, "%s: SLOTCTRL %x value read %x\n", __func__,
399 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_ctrl);
414 void pciehp_get_latch_status(struct controller *ctrl, u8 *status)
416 struct pci_dev *pdev = ctrl_dev(ctrl);
425 * @ctrl: PCIe hotplug controller
435 int pciehp_card_present(struct controller *ctrl)
437 struct pci_dev *pdev = ctrl_dev(ctrl);
450 * @ctrl: PCIe hotplug controller
460 int pciehp_card_present_or_link_active(struct controller *ctrl)
464 ret = pciehp_card_present(ctrl);
468 return pciehp_check_link_active(ctrl);
471 int pciehp_query_power_fault(struct controller *ctrl)
473 struct pci_dev *pdev = ctrl_dev(ctrl);
483 struct controller *ctrl = to_ctrl(hotplug_slot);
484 struct pci_dev *pdev = ctrl_dev(ctrl);
487 pcie_write_cmd_nowait(ctrl, status << 6,
495 * @ctrl: PCIe hotplug controller
508 void pciehp_set_indicators(struct controller *ctrl, int pwr, int attn)
512 if (PWR_LED(ctrl) && pwr != INDICATOR_NOOP) {
517 if (ATTN_LED(ctrl) && attn != INDICATOR_NOOP) {
523 pcie_write_cmd_nowait(ctrl, cmd, mask);
524 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
525 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, cmd);
529 int pciehp_power_on_slot(struct controller *ctrl)
531 struct pci_dev *pdev = ctrl_dev(ctrl);
540 ctrl->power_fault_detected = 0;
542 pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_ON, PCI_EXP_SLTCTL_PCC);
543 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
544 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL,
547 retval = pciehp_link_enable(ctrl);
549 ctrl_err(ctrl, "%s: Can not enable the link!\n", __func__);
554 void pciehp_power_off_slot(struct controller *ctrl)
556 pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_OFF, PCI_EXP_SLTCTL_PCC);
557 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
558 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL,
562 static void pciehp_ignore_dpc_link_change(struct controller *ctrl,
570 atomic_and(~PCI_EXP_SLTSTA_DLLSC, &ctrl->pending_events);
574 ctrl_info(ctrl, "Slot(%s): Link Down/Up ignored (recovered by DPC)\n",
575 slot_name(ctrl));
582 down_read_nested(&ctrl->reset_lock, ctrl->depth);
583 if (!pciehp_check_link_active(ctrl))
584 pciehp_request(ctrl, PCI_EXP_SLTSTA_DLLSC);
585 up_read(&ctrl->reset_lock);
590 struct controller *ctrl = (struct controller *)dev_id;
591 struct pci_dev *pdev = ctrl_dev(ctrl);
600 (!(ctrl->slot_ctrl & PCI_EXP_SLTCTL_HPIE) && !pciehp_poll_mode))
613 atomic_or(RERUN_ISR, &ctrl->pending_events);
621 ctrl_info(ctrl, "%s: no response from device\n", __func__);
639 if (ctrl->power_fault_detected)
642 ctrl->power_fault_detected = true;
664 ctrl_dbg(ctrl, "pending interrupts %#06x from Slot Status\n", events);
673 ctrl->cmd_busy = 0;
675 wake_up(&ctrl->queue);
684 ctrl_dbg(ctrl, "ignoring hotplug event %#06x\n", events);
689 atomic_or(events, &ctrl->pending_events);
695 struct controller *ctrl = (struct controller *)dev_id;
696 struct pci_dev *pdev = ctrl_dev(ctrl);
700 ctrl->ist_running = true;
704 if (atomic_fetch_and(~RERUN_ISR, &ctrl->pending_events) & RERUN_ISR) {
712 events = atomic_xchg(&ctrl->pending_events, 0);
720 ctrl_info(ctrl, "Slot(%s): Attention button pressed\n",
721 slot_name(ctrl));
722 pciehp_handle_button_press(ctrl);
727 ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl));
728 pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,
737 ctrl->state == ON_STATE) {
739 pciehp_ignore_dpc_link_change(ctrl, pdev, irq);
746 down_read_nested(&ctrl->reset_lock, ctrl->depth);
748 pciehp_handle_disable_request(ctrl);
750 pciehp_handle_presence_or_link_change(ctrl, events);
751 up_read(&ctrl->reset_lock);
756 ctrl->ist_running = false;
757 wake_up(&ctrl->requester);
763 struct controller *ctrl = data;
769 while (pciehp_isr(IRQ_NOTCONNECTED, ctrl) == IRQ_WAKE_THREAD ||
770 atomic_read(&ctrl->pending_events))
771 pciehp_ist(IRQ_NOTCONNECTED, ctrl);
782 static void pcie_enable_notification(struct controller *ctrl)
803 if (ATTN_BUTTN(ctrl))
815 pcie_write_cmd_nowait(ctrl, cmd, mask);
816 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
817 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, cmd);
820 static void pcie_disable_notification(struct controller *ctrl)
828 pcie_write_cmd(ctrl, 0, mask);
829 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
830 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, 0);
833 void pcie_clear_hotplug_events(struct controller *ctrl)
835 pcie_capability_write_word(ctrl_dev(ctrl), PCI_EXP_SLTSTA,
839 void pcie_enable_interrupt(struct controller *ctrl)
844 pcie_write_cmd(ctrl, mask, mask);
847 void pcie_disable_interrupt(struct controller *ctrl)
859 pcie_write_cmd(ctrl, 0, mask);
872 struct controller *ctrl = to_ctrl(hotplug_slot);
873 struct pci_dev *pdev = ctrl_dev(ctrl);
880 down_write_nested(&ctrl->reset_lock, ctrl->depth);
882 if (!ATTN_BUTTN(ctrl)) {
889 pcie_write_cmd(ctrl, 0, ctrl_mask);
890 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
891 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, 0);
893 rc = pci_bridge_secondary_bus_reset(ctrl->pcie->port);
896 pcie_write_cmd_nowait(ctrl, ctrl_mask, ctrl_mask);
897 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
898 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, ctrl_mask);
900 up_write(&ctrl->reset_lock);
904 int pcie_init_notification(struct controller *ctrl)
906 if (pciehp_request_irq(ctrl))
908 pcie_enable_notification(ctrl);
909 ctrl->notification_enabled = 1;
913 void pcie_shutdown_notification(struct controller *ctrl)
915 if (ctrl->notification_enabled) {
916 pcie_disable_notification(ctrl);
917 pciehp_free_irq(ctrl);
918 ctrl->notification_enabled = 0;
922 static inline void dbg_ctrl(struct controller *ctrl)
924 struct pci_dev *pdev = ctrl->pcie->port;
927 ctrl_dbg(ctrl, "Slot Capabilities : 0x%08x\n", ctrl->slot_cap);
929 ctrl_dbg(ctrl, "Slot Status : 0x%04x\n", reg16);
931 ctrl_dbg(ctrl, "Slot Control : 0x%04x\n", reg16);
952 struct controller *ctrl;
958 ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
959 if (!ctrl)
962 ctrl->pcie = dev;
963 ctrl->depth = pcie_hotplug_depth(dev->port);
976 ctrl->slot_cap = slot_cap;
977 mutex_init(&ctrl->ctrl_lock);
978 mutex_init(&ctrl->state_lock);
979 init_rwsem(&ctrl->reset_lock);
980 init_waitqueue_head(&ctrl->requester);
981 init_waitqueue_head(&ctrl->queue);
982 INIT_DELAYED_WORK(&ctrl->button_work, pciehp_queue_pushbutton_work);
983 dbg_ctrl(ctrl);
986 ctrl->state = list_empty(&subordinate->devices) ? OFF_STATE : ON_STATE;
991 pcie_write_cmd_nowait(ctrl, PCI_EXP_SLTCTL_IBPD_DISABLE,
993 ctrl->inband_presence_disabled = 1;
997 ctrl->inband_presence_disabled = 1;
1008 ctrl_info(ctrl, "Slot #%d AttnBtn%c PwrCtrl%c MRL%c AttnInd%c PwrInd%c HotPlug%c Surprise%c Interlock%c NoCompl%c IbPresDis%c LLActRep%c%s\n",
1027 if (POWER_CTRL(ctrl)) {
1028 pciehp_get_power_status(ctrl, &poweron);
1029 if (!pciehp_card_present_or_link_active(ctrl) && poweron) {
1030 pcie_disable_notification(ctrl);
1031 pciehp_power_off_slot(ctrl);
1035 return ctrl;
1038 void pciehp_release_ctrl(struct controller *ctrl)
1040 cancel_delayed_work_sync(&ctrl->button_work);
1041 kfree(ctrl);