Lines Matching full:ctrl
48 static inline struct pci_dev *ctrl_dev(struct controller *ctrl) in ctrl_dev() argument
50 return ctrl->pcie->port; in ctrl_dev()
57 static inline int pciehp_request_irq(struct controller *ctrl) in pciehp_request_irq() argument
59 int retval, irq = ctrl->pcie->irq; in pciehp_request_irq()
62 ctrl->poll_thread = kthread_run(&pciehp_poll, ctrl, in pciehp_request_irq()
64 slot_name(ctrl)); in pciehp_request_irq()
65 return PTR_ERR_OR_ZERO(ctrl->poll_thread); in pciehp_request_irq()
70 IRQF_SHARED, "pciehp", ctrl); in pciehp_request_irq()
72 ctrl_err(ctrl, "Cannot get irq %d for the hotplug controller\n", in pciehp_request_irq()
77 static inline void pciehp_free_irq(struct controller *ctrl) in pciehp_free_irq() argument
80 kthread_stop(ctrl->poll_thread); in pciehp_free_irq()
82 free_irq(ctrl->pcie->irq, ctrl); in pciehp_free_irq()
85 static int pcie_poll_cmd(struct controller *ctrl, int timeout) in pcie_poll_cmd() argument
87 struct pci_dev *pdev = ctrl_dev(ctrl); in pcie_poll_cmd()
93 ctrl_info(ctrl, "%s: no response from device\n", in pcie_poll_cmd()
109 static void pcie_wait_cmd(struct controller *ctrl) in pcie_wait_cmd() argument
113 unsigned long cmd_timeout = ctrl->cmd_started + duration; in pcie_wait_cmd()
121 if (NO_CMD_CMPL(ctrl)) in pcie_wait_cmd()
124 if (!ctrl->cmd_busy) in pcie_wait_cmd()
137 if (ctrl->slot_ctrl & PCI_EXP_SLTCTL_HPIE && in pcie_wait_cmd()
138 ctrl->slot_ctrl & PCI_EXP_SLTCTL_CCIE) in pcie_wait_cmd()
139 rc = wait_event_timeout(ctrl->queue, !ctrl->cmd_busy, timeout); in pcie_wait_cmd()
141 rc = pcie_poll_cmd(ctrl, jiffies_to_msecs(timeout)); in pcie_wait_cmd()
144 ctrl_info(ctrl, "Timeout on hotplug command %#06x (issued %u msec ago)\n", in pcie_wait_cmd()
145 ctrl->slot_ctrl, in pcie_wait_cmd()
146 jiffies_to_msecs(jiffies - ctrl->cmd_started)); in pcie_wait_cmd()
154 static void pcie_do_write_cmd(struct controller *ctrl, u16 cmd, in pcie_do_write_cmd() argument
157 struct pci_dev *pdev = ctrl_dev(ctrl); in pcie_do_write_cmd()
160 mutex_lock(&ctrl->ctrl_lock); in pcie_do_write_cmd()
165 pcie_wait_cmd(ctrl); in pcie_do_write_cmd()
169 ctrl_info(ctrl, "%s: no response from device\n", __func__); in pcie_do_write_cmd()
176 ctrl->cmd_busy = 1; in pcie_do_write_cmd()
178 ctrl->slot_ctrl = slot_ctrl; in pcie_do_write_cmd()
180 ctrl->cmd_started = jiffies; in pcie_do_write_cmd()
191 ctrl->cmd_busy = 0; in pcie_do_write_cmd()
198 pcie_wait_cmd(ctrl); in pcie_do_write_cmd()
201 mutex_unlock(&ctrl->ctrl_lock); in pcie_do_write_cmd()
206 * @ctrl: controller to which the command is issued
210 static void pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask) in pcie_write_cmd() argument
212 pcie_do_write_cmd(ctrl, cmd, mask, true); in pcie_write_cmd()
216 static void pcie_write_cmd_nowait(struct controller *ctrl, u16 cmd, u16 mask) in pcie_write_cmd_nowait() argument
218 pcie_do_write_cmd(ctrl, cmd, mask, false); in pcie_write_cmd_nowait()
223 * @ctrl: PCIe hotplug controller
232 int pciehp_check_link_active(struct controller *ctrl) in pciehp_check_link_active() argument
234 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_check_link_active()
243 ctrl_dbg(ctrl, "%s: lnk_status = %x\n", __func__, lnk_status); in pciehp_check_link_active()
288 int pciehp_check_link_status(struct controller *ctrl) in pciehp_check_link_status() argument
290 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_check_link_status()
295 ctrl_info(ctrl, "Slot(%s): No link\n", slot_name(ctrl)); in pciehp_check_link_status()
299 if (ctrl->inband_presence_disabled) in pciehp_check_link_status()
302 found = pci_bus_check_dev(ctrl->pcie->port->subordinate, in pciehp_check_link_status()
308 &ctrl->pending_events); in pciehp_check_link_status()
311 ctrl_dbg(ctrl, "%s: lnk_status = %x\n", __func__, lnk_status); in pciehp_check_link_status()
314 ctrl_info(ctrl, "Slot(%s): Cannot train link: status %#06x\n", in pciehp_check_link_status()
315 slot_name(ctrl), lnk_status); in pciehp_check_link_status()
319 pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status); in pciehp_check_link_status()
322 ctrl_info(ctrl, "Slot(%s): No device found\n", in pciehp_check_link_status()
323 slot_name(ctrl)); in pciehp_check_link_status()
330 static int __pciehp_link_set(struct controller *ctrl, bool enable) in __pciehp_link_set() argument
332 struct pci_dev *pdev = ctrl_dev(ctrl); in __pciehp_link_set()
343 ctrl_dbg(ctrl, "%s: lnk_ctrl = %x\n", __func__, lnk_ctrl); in __pciehp_link_set()
347 static int pciehp_link_enable(struct controller *ctrl) in pciehp_link_enable() argument
349 return __pciehp_link_set(ctrl, true); in pciehp_link_enable()
355 struct controller *ctrl = to_ctrl(hotplug_slot); in pciehp_get_raw_indicator_status() local
356 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_get_raw_indicator_status()
368 struct controller *ctrl = to_ctrl(hotplug_slot); in pciehp_get_attention_status() local
369 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_get_attention_status()
375 ctrl_dbg(ctrl, "%s: SLOTCTRL %x, value read %x\n", __func__, in pciehp_get_attention_status()
376 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_ctrl); in pciehp_get_attention_status()
396 void pciehp_get_power_status(struct controller *ctrl, u8 *status) in pciehp_get_power_status() argument
398 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_get_power_status()
402 ctrl_dbg(ctrl, "%s: SLOTCTRL %x value read %x\n", __func__, in pciehp_get_power_status()
403 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_ctrl); in pciehp_get_power_status()
418 void pciehp_get_latch_status(struct controller *ctrl, u8 *status) in pciehp_get_latch_status() argument
420 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_get_latch_status()
429 * @ctrl: PCIe hotplug controller
439 int pciehp_card_present(struct controller *ctrl) in pciehp_card_present() argument
441 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_card_present()
454 * @ctrl: PCIe hotplug controller
464 int pciehp_card_present_or_link_active(struct controller *ctrl) in pciehp_card_present_or_link_active() argument
468 ret = pciehp_card_present(ctrl); in pciehp_card_present_or_link_active()
472 return pciehp_check_link_active(ctrl); in pciehp_card_present_or_link_active()
475 int pciehp_query_power_fault(struct controller *ctrl) in pciehp_query_power_fault() argument
477 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_query_power_fault()
487 struct controller *ctrl = to_ctrl(hotplug_slot); in pciehp_set_raw_indicator_status() local
488 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_set_raw_indicator_status()
491 pcie_write_cmd_nowait(ctrl, status << 6, in pciehp_set_raw_indicator_status()
499 * @ctrl: PCIe hotplug controller
512 void pciehp_set_indicators(struct controller *ctrl, int pwr, int attn) in pciehp_set_indicators() argument
516 if (PWR_LED(ctrl) && pwr != INDICATOR_NOOP) { in pciehp_set_indicators()
521 if (ATTN_LED(ctrl) && attn != INDICATOR_NOOP) { in pciehp_set_indicators()
527 pcie_write_cmd_nowait(ctrl, cmd, mask); in pciehp_set_indicators()
528 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, in pciehp_set_indicators()
529 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, cmd); in pciehp_set_indicators()
533 int pciehp_power_on_slot(struct controller *ctrl) in pciehp_power_on_slot() argument
535 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_power_on_slot()
544 ctrl->power_fault_detected = 0; in pciehp_power_on_slot()
546 pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_ON, PCI_EXP_SLTCTL_PCC); in pciehp_power_on_slot()
547 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, in pciehp_power_on_slot()
548 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, in pciehp_power_on_slot()
551 retval = pciehp_link_enable(ctrl); in pciehp_power_on_slot()
553 ctrl_err(ctrl, "%s: Can not enable the link!\n", __func__); in pciehp_power_on_slot()
558 void pciehp_power_off_slot(struct controller *ctrl) in pciehp_power_off_slot() argument
560 pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_OFF, PCI_EXP_SLTCTL_PCC); in pciehp_power_off_slot()
561 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, in pciehp_power_off_slot()
562 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, in pciehp_power_off_slot()
566 static void pciehp_ignore_dpc_link_change(struct controller *ctrl, in pciehp_ignore_dpc_link_change() argument
574 atomic_and(~PCI_EXP_SLTSTA_DLLSC, &ctrl->pending_events); in pciehp_ignore_dpc_link_change()
578 ctrl_info(ctrl, "Slot(%s): Link Down/Up ignored (recovered by DPC)\n", in pciehp_ignore_dpc_link_change()
579 slot_name(ctrl)); in pciehp_ignore_dpc_link_change()
586 down_read_nested(&ctrl->reset_lock, ctrl->depth); in pciehp_ignore_dpc_link_change()
587 if (!pciehp_check_link_active(ctrl)) in pciehp_ignore_dpc_link_change()
588 pciehp_request(ctrl, PCI_EXP_SLTSTA_DLLSC); in pciehp_ignore_dpc_link_change()
589 up_read(&ctrl->reset_lock); in pciehp_ignore_dpc_link_change()
594 struct controller *ctrl = (struct controller *)dev_id; in pciehp_isr() local
595 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_isr()
604 (!(ctrl->slot_ctrl & PCI_EXP_SLTCTL_HPIE) && !pciehp_poll_mode)) in pciehp_isr()
617 atomic_or(RERUN_ISR, &ctrl->pending_events); in pciehp_isr()
625 ctrl_info(ctrl, "%s: no response from device\n", __func__); in pciehp_isr()
643 if (ctrl->power_fault_detected) in pciehp_isr()
646 ctrl->power_fault_detected = true; in pciehp_isr()
668 ctrl_dbg(ctrl, "pending interrupts %#06x from Slot Status\n", events); in pciehp_isr()
677 ctrl->cmd_busy = 0; in pciehp_isr()
679 wake_up(&ctrl->queue); in pciehp_isr()
688 ctrl_dbg(ctrl, "ignoring hotplug event %#06x\n", events); in pciehp_isr()
693 atomic_or(events, &ctrl->pending_events); in pciehp_isr()
699 struct controller *ctrl = (struct controller *)dev_id; in pciehp_ist() local
700 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_ist()
704 ctrl->ist_running = true; in pciehp_ist()
708 if (atomic_fetch_and(~RERUN_ISR, &ctrl->pending_events) & RERUN_ISR) { in pciehp_ist()
716 events = atomic_xchg(&ctrl->pending_events, 0); in pciehp_ist()
724 ctrl_info(ctrl, "Slot(%s): Attention button pressed\n", in pciehp_ist()
725 slot_name(ctrl)); in pciehp_ist()
726 pciehp_handle_button_press(ctrl); in pciehp_ist()
731 ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl)); in pciehp_ist()
732 pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF, in pciehp_ist()
741 ctrl->state == ON_STATE) { in pciehp_ist()
743 pciehp_ignore_dpc_link_change(ctrl, pdev, irq); in pciehp_ist()
750 down_read_nested(&ctrl->reset_lock, ctrl->depth); in pciehp_ist()
752 pciehp_handle_disable_request(ctrl); in pciehp_ist()
754 pciehp_handle_presence_or_link_change(ctrl, events); in pciehp_ist()
755 up_read(&ctrl->reset_lock); in pciehp_ist()
760 ctrl->ist_running = false; in pciehp_ist()
761 wake_up(&ctrl->requester); in pciehp_ist()
767 struct controller *ctrl = data; in pciehp_poll() local
773 while (pciehp_isr(IRQ_NOTCONNECTED, ctrl) == IRQ_WAKE_THREAD || in pciehp_poll()
774 atomic_read(&ctrl->pending_events)) in pciehp_poll()
775 pciehp_ist(IRQ_NOTCONNECTED, ctrl); in pciehp_poll()
786 static void pcie_enable_notification(struct controller *ctrl) in pcie_enable_notification() argument
807 if (ATTN_BUTTN(ctrl)) in pcie_enable_notification()
819 pcie_write_cmd_nowait(ctrl, cmd, mask); in pcie_enable_notification()
820 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, in pcie_enable_notification()
821 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, cmd); in pcie_enable_notification()
824 static void pcie_disable_notification(struct controller *ctrl) in pcie_disable_notification() argument
832 pcie_write_cmd(ctrl, 0, mask); in pcie_disable_notification()
833 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, in pcie_disable_notification()
834 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, 0); in pcie_disable_notification()
837 void pcie_clear_hotplug_events(struct controller *ctrl) in pcie_clear_hotplug_events() argument
839 pcie_capability_write_word(ctrl_dev(ctrl), PCI_EXP_SLTSTA, in pcie_clear_hotplug_events()
843 void pcie_enable_interrupt(struct controller *ctrl) in pcie_enable_interrupt() argument
848 pcie_write_cmd(ctrl, mask, mask); in pcie_enable_interrupt()
851 void pcie_disable_interrupt(struct controller *ctrl) in pcie_disable_interrupt() argument
863 pcie_write_cmd(ctrl, 0, mask); in pcie_disable_interrupt()
876 struct controller *ctrl = to_ctrl(hotplug_slot); in pciehp_reset_slot() local
877 struct pci_dev *pdev = ctrl_dev(ctrl); in pciehp_reset_slot()
884 down_write_nested(&ctrl->reset_lock, ctrl->depth); in pciehp_reset_slot()
886 if (!ATTN_BUTTN(ctrl)) { in pciehp_reset_slot()
893 pcie_write_cmd(ctrl, 0, ctrl_mask); in pciehp_reset_slot()
894 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, in pciehp_reset_slot()
895 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, 0); in pciehp_reset_slot()
897 rc = pci_bridge_secondary_bus_reset(ctrl->pcie->port); in pciehp_reset_slot()
900 pcie_write_cmd_nowait(ctrl, ctrl_mask, ctrl_mask); in pciehp_reset_slot()
901 ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, in pciehp_reset_slot()
902 pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, ctrl_mask); in pciehp_reset_slot()
904 up_write(&ctrl->reset_lock); in pciehp_reset_slot()
908 int pcie_init_notification(struct controller *ctrl) in pcie_init_notification() argument
910 if (pciehp_request_irq(ctrl)) in pcie_init_notification()
912 pcie_enable_notification(ctrl); in pcie_init_notification()
913 ctrl->notification_enabled = 1; in pcie_init_notification()
917 void pcie_shutdown_notification(struct controller *ctrl) in pcie_shutdown_notification() argument
919 if (ctrl->notification_enabled) { in pcie_shutdown_notification()
920 pcie_disable_notification(ctrl); in pcie_shutdown_notification()
921 pciehp_free_irq(ctrl); in pcie_shutdown_notification()
922 ctrl->notification_enabled = 0; in pcie_shutdown_notification()
926 static inline void dbg_ctrl(struct controller *ctrl) in dbg_ctrl() argument
928 struct pci_dev *pdev = ctrl->pcie->port; in dbg_ctrl()
931 ctrl_dbg(ctrl, "Slot Capabilities : 0x%08x\n", ctrl->slot_cap); in dbg_ctrl()
933 ctrl_dbg(ctrl, "Slot Status : 0x%04x\n", reg16); in dbg_ctrl()
935 ctrl_dbg(ctrl, "Slot Control : 0x%04x\n", reg16); in dbg_ctrl()
956 struct controller *ctrl; in pcie_init() local
962 ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); in pcie_init()
963 if (!ctrl) in pcie_init()
966 ctrl->pcie = dev; in pcie_init()
967 ctrl->depth = pcie_hotplug_depth(dev->port); in pcie_init()
980 ctrl->slot_cap = slot_cap; in pcie_init()
981 mutex_init(&ctrl->ctrl_lock); in pcie_init()
982 mutex_init(&ctrl->state_lock); in pcie_init()
983 init_rwsem(&ctrl->reset_lock); in pcie_init()
984 init_waitqueue_head(&ctrl->requester); in pcie_init()
985 init_waitqueue_head(&ctrl->queue); in pcie_init()
986 INIT_DELAYED_WORK(&ctrl->button_work, pciehp_queue_pushbutton_work); in pcie_init()
987 dbg_ctrl(ctrl); in pcie_init()
990 ctrl->state = list_empty(&subordinate->devices) ? OFF_STATE : ON_STATE; in pcie_init()
995 pcie_write_cmd_nowait(ctrl, PCI_EXP_SLTCTL_IBPD_DISABLE, in pcie_init()
997 ctrl->inband_presence_disabled = 1; in pcie_init()
1001 ctrl->inband_presence_disabled = 1; in pcie_init()
1012 …ctrl_info(ctrl, "Slot #%d AttnBtn%c PwrCtrl%c MRL%c AttnInd%c PwrInd%c HotPlug%c Surprise%c Interl… in pcie_init()
1031 if (POWER_CTRL(ctrl)) { in pcie_init()
1032 pciehp_get_power_status(ctrl, &poweron); in pcie_init()
1033 if (!pciehp_card_present_or_link_active(ctrl) && poweron) { in pcie_init()
1034 pcie_disable_notification(ctrl); in pcie_init()
1035 pciehp_power_off_slot(ctrl); in pcie_init()
1039 return ctrl; in pcie_init()
1042 void pciehp_release_ctrl(struct controller *ctrl) in pciehp_release_ctrl() argument
1044 cancel_delayed_work_sync(&ctrl->button_work); in pciehp_release_ctrl()
1045 kfree(ctrl); in pciehp_release_ctrl()