34 static void set_slot_off(struct controller *ctrl)  in set_slot_off()  argument
40 	if (POWER_CTRL(ctrl)) {  in set_slot_off()
41 		pciehp_power_off_slot(ctrl);  in set_slot_off()
51 	pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in set_slot_off()
62 static int board_added(struct controller *ctrl)  in board_added()  argument
65 	struct pci_bus *parent = ctrl->pcie->port->subordinate;  in board_added()
67 	if (POWER_CTRL(ctrl)) {  in board_added()
69 		retval = pciehp_power_on_slot(ctrl);  in board_added()
74 	pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK,  in board_added()
78 	retval = pciehp_check_link_status(ctrl);  in board_added()
83 	if (ctrl->power_fault_detected || pciehp_query_power_fault(ctrl)) {  in board_added()
84 		ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl));  in board_added()
89 	retval = pciehp_configure_device(ctrl);  in board_added()
92 			ctrl_err(ctrl, "Cannot add device at %04x:%02x:00\n",  in board_added()
98 	pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON,  in board_added()
103 	set_slot_off(ctrl);  in board_added()
112 static void remove_board(struct controller *ctrl, bool safe_removal)  in remove_board()  argument
114 	pciehp_unconfigure_device(ctrl, safe_removal);  in remove_board()
116 	if (POWER_CTRL(ctrl)) {  in remove_board()
117 		pciehp_power_off_slot(ctrl);  in remove_board()
128 			   &ctrl->pending_events);  in remove_board()
131 	pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in remove_board()
135 	pcie_reset_lbms(ctrl->pcie->port);  in remove_board()
138 static int pciehp_enable_slot(struct controller *ctrl);
139 static int pciehp_disable_slot(struct controller *ctrl, bool safe_removal);
141 void pciehp_request(struct controller *ctrl, int action)  in pciehp_request()  argument
143 	atomic_or(action, &ctrl->pending_events);  in pciehp_request()
145 		irq_wake_thread(ctrl->pcie->irq, ctrl);  in pciehp_request()
150 	struct controller *ctrl = container_of(work, struct controller,  in pciehp_queue_pushbutton_work()  local
153 	mutex_lock(&ctrl->state_lock);  in pciehp_queue_pushbutton_work()
154 	switch (ctrl->state) {  in pciehp_queue_pushbutton_work()
156 		pciehp_request(ctrl, DISABLE_SLOT);  in pciehp_queue_pushbutton_work()
159 		pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC);  in pciehp_queue_pushbutton_work()
164 	mutex_unlock(&ctrl->state_lock);  in pciehp_queue_pushbutton_work()
167 void pciehp_handle_button_press(struct controller *ctrl)  in pciehp_handle_button_press()  argument
169 	mutex_lock(&ctrl->state_lock);  in pciehp_handle_button_press()
170 	switch (ctrl->state) {  in pciehp_handle_button_press()
173 		if (ctrl->state == ON_STATE) {  in pciehp_handle_button_press()
174 			ctrl->state = BLINKINGOFF_STATE;  in pciehp_handle_button_press()
175 			ctrl_info(ctrl, "Slot(%s): Button press: will power off in 5 sec\n",  in pciehp_handle_button_press()
176 				  slot_name(ctrl));  in pciehp_handle_button_press()
178 			ctrl->state = BLINKINGON_STATE;  in pciehp_handle_button_press()
179 			ctrl_info(ctrl, "Slot(%s): Button press: will power on in 5 sec\n",  in pciehp_handle_button_press()
180 				  slot_name(ctrl));  in pciehp_handle_button_press()
183 		pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK,  in pciehp_handle_button_press()
185 		schedule_delayed_work(&ctrl->button_work, 5 * HZ);  in pciehp_handle_button_press()
194 		cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_button_press()
195 		if (ctrl->state == BLINKINGOFF_STATE) {  in pciehp_handle_button_press()
196 			ctrl->state = ON_STATE;  in pciehp_handle_button_press()
197 			pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON,  in pciehp_handle_button_press()
199 			ctrl_info(ctrl, "Slot(%s): Button press: canceling request to power off\n",  in pciehp_handle_button_press()
200 				  slot_name(ctrl));  in pciehp_handle_button_press()
202 			ctrl->state = OFF_STATE;  in pciehp_handle_button_press()
203 			pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in pciehp_handle_button_press()
205 			ctrl_info(ctrl, "Slot(%s): Button press: canceling request to power on\n",  in pciehp_handle_button_press()
206 				  slot_name(ctrl));  in pciehp_handle_button_press()
210 		ctrl_err(ctrl, "Slot(%s): Button press: ignoring invalid state %#x\n",  in pciehp_handle_button_press()
211 			 slot_name(ctrl), ctrl->state);  in pciehp_handle_button_press()
214 	mutex_unlock(&ctrl->state_lock);  in pciehp_handle_button_press()
217 void pciehp_handle_disable_request(struct controller *ctrl)  in pciehp_handle_disable_request()  argument
219 	mutex_lock(&ctrl->state_lock);  in pciehp_handle_disable_request()
220 	switch (ctrl->state) {  in pciehp_handle_disable_request()
223 		cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_disable_request()
226 	ctrl->state = POWEROFF_STATE;  in pciehp_handle_disable_request()
227 	mutex_unlock(&ctrl->state_lock);  in pciehp_handle_disable_request()
229 	ctrl->request_result = pciehp_disable_slot(ctrl, SAFE_REMOVAL);  in pciehp_handle_disable_request()
232 void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events)  in pciehp_handle_presence_or_link_change()  argument
240 	mutex_lock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
241 	switch (ctrl->state) {  in pciehp_handle_presence_or_link_change()
243 		cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_presence_or_link_change()
246 		ctrl->state = POWEROFF_STATE;  in pciehp_handle_presence_or_link_change()
247 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
249 			ctrl_info(ctrl, "Slot(%s): Link Down\n",  in pciehp_handle_presence_or_link_change()
250 				  slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
251 			trace_pci_hp_event(pci_name(ctrl->pcie->port),  in pciehp_handle_presence_or_link_change()
252 					   slot_name(ctrl),  in pciehp_handle_presence_or_link_change()
256 			ctrl_info(ctrl, "Slot(%s): Card not present\n",  in pciehp_handle_presence_or_link_change()
257 				  slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
258 			trace_pci_hp_event(pci_name(ctrl->pcie->port),  in pciehp_handle_presence_or_link_change()
259 					   slot_name(ctrl),  in pciehp_handle_presence_or_link_change()
262 		pciehp_disable_slot(ctrl, SURPRISE_REMOVAL);  in pciehp_handle_presence_or_link_change()
265 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
270 	mutex_lock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
271 	present = pciehp_card_present(ctrl);  in pciehp_handle_presence_or_link_change()
272 	link_active = pciehp_check_link_active(ctrl);  in pciehp_handle_presence_or_link_change()
274 		if (ctrl->state == BLINKINGON_STATE) {  in pciehp_handle_presence_or_link_change()
275 			ctrl->state = OFF_STATE;  in pciehp_handle_presence_or_link_change()
276 			cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_presence_or_link_change()
277 			pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in pciehp_handle_presence_or_link_change()
279 			ctrl_info(ctrl, "Slot(%s): Card not present\n",  in pciehp_handle_presence_or_link_change()
280 				  slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
281 			trace_pci_hp_event(pci_name(ctrl->pcie->port),  in pciehp_handle_presence_or_link_change()
282 					   slot_name(ctrl),  in pciehp_handle_presence_or_link_change()
285 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
289 	switch (ctrl->state) {  in pciehp_handle_presence_or_link_change()
291 		cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_presence_or_link_change()
294 		ctrl->state = POWERON_STATE;  in pciehp_handle_presence_or_link_change()
295 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
297 			ctrl_info(ctrl, "Slot(%s): Card present\n",  in pciehp_handle_presence_or_link_change()
298 				  slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
299 			trace_pci_hp_event(pci_name(ctrl->pcie->port),  in pciehp_handle_presence_or_link_change()
300 					   slot_name(ctrl),  in pciehp_handle_presence_or_link_change()
304 			ctrl_info(ctrl, "Slot(%s): Link Up\n", slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
305 			trace_pci_hp_event(pci_name(ctrl->pcie->port),  in pciehp_handle_presence_or_link_change()
306 					   slot_name(ctrl),  in pciehp_handle_presence_or_link_change()
309 		ctrl->request_result = pciehp_enable_slot(ctrl);  in pciehp_handle_presence_or_link_change()
312 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
317 static int __pciehp_enable_slot(struct controller *ctrl)  in __pciehp_enable_slot()  argument
321 	if (MRL_SENS(ctrl)) {  in __pciehp_enable_slot()
322 		pciehp_get_latch_status(ctrl, &getstatus);  in __pciehp_enable_slot()
324 			ctrl_info(ctrl, "Slot(%s): Latch open\n",  in __pciehp_enable_slot()
325 				  slot_name(ctrl));  in __pciehp_enable_slot()
330 	if (POWER_CTRL(ctrl)) {  in __pciehp_enable_slot()
331 		pciehp_get_power_status(ctrl, &getstatus);  in __pciehp_enable_slot()
333 			ctrl_info(ctrl, "Slot(%s): Already enabled\n",  in __pciehp_enable_slot()
334 				  slot_name(ctrl));  in __pciehp_enable_slot()
339 	return board_added(ctrl);  in __pciehp_enable_slot()
342 static int pciehp_enable_slot(struct controller *ctrl)  in pciehp_enable_slot()  argument
346 	pm_runtime_get_sync(&ctrl->pcie->port->dev);  in pciehp_enable_slot()
347 	ret = __pciehp_enable_slot(ctrl);  in pciehp_enable_slot()
348 	if (ret && ATTN_BUTTN(ctrl))  in pciehp_enable_slot()
350 		pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in pciehp_enable_slot()
352 	pm_runtime_put(&ctrl->pcie->port->dev);  in pciehp_enable_slot()
354 	mutex_lock(&ctrl->state_lock);  in pciehp_enable_slot()
355 	ctrl->state = ret ? OFF_STATE : ON_STATE;  in pciehp_enable_slot()
356 	mutex_unlock(&ctrl->state_lock);  in pciehp_enable_slot()
361 static int __pciehp_disable_slot(struct controller *ctrl, bool safe_removal)  in __pciehp_disable_slot()  argument
365 	if (POWER_CTRL(ctrl)) {  in __pciehp_disable_slot()
366 		pciehp_get_power_status(ctrl, &getstatus);  in __pciehp_disable_slot()
368 			ctrl_info(ctrl, "Slot(%s): Already disabled\n",  in __pciehp_disable_slot()
369 				  slot_name(ctrl));  in __pciehp_disable_slot()
374 	remove_board(ctrl, safe_removal);  in __pciehp_disable_slot()
378 static int pciehp_disable_slot(struct controller *ctrl, bool safe_removal)  in pciehp_disable_slot()  argument
382 	pm_runtime_get_sync(&ctrl->pcie->port->dev);  in pciehp_disable_slot()
383 	ret = __pciehp_disable_slot(ctrl, safe_removal);  in pciehp_disable_slot()
384 	pm_runtime_put(&ctrl->pcie->port->dev);  in pciehp_disable_slot()
386 	mutex_lock(&ctrl->state_lock);  in pciehp_disable_slot()
387 	ctrl->state = OFF_STATE;  in pciehp_disable_slot()
388 	mutex_unlock(&ctrl->state_lock);  in pciehp_disable_slot()
395 	struct controller *ctrl = to_ctrl(hotplug_slot);  in pciehp_sysfs_enable_slot()  local
397 	mutex_lock(&ctrl->state_lock);  in pciehp_sysfs_enable_slot()
398 	switch (ctrl->state) {  in pciehp_sysfs_enable_slot()
401 		mutex_unlock(&ctrl->state_lock);  in pciehp_sysfs_enable_slot()
406 		ctrl->request_result = -ENODEV;  in pciehp_sysfs_enable_slot()
407 		pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC);  in pciehp_sysfs_enable_slot()
408 		wait_event(ctrl->requester,  in pciehp_sysfs_enable_slot()
409 			   !atomic_read(&ctrl->pending_events) &&  in pciehp_sysfs_enable_slot()
410 			   !ctrl->ist_running);  in pciehp_sysfs_enable_slot()
411 		return ctrl->request_result;  in pciehp_sysfs_enable_slot()
413 		ctrl_info(ctrl, "Slot(%s): Already in powering on state\n",  in pciehp_sysfs_enable_slot()
414 			  slot_name(ctrl));  in pciehp_sysfs_enable_slot()
419 		ctrl_info(ctrl, "Slot(%s): Already enabled\n",  in pciehp_sysfs_enable_slot()
420 			  slot_name(ctrl));  in pciehp_sysfs_enable_slot()
423 		ctrl_err(ctrl, "Slot(%s): Invalid state %#x\n",  in pciehp_sysfs_enable_slot()
424 			 slot_name(ctrl), ctrl->state);  in pciehp_sysfs_enable_slot()
427 	mutex_unlock(&ctrl->state_lock);  in pciehp_sysfs_enable_slot()
434 	struct controller *ctrl = to_ctrl(hotplug_slot);  in pciehp_sysfs_disable_slot()  local
436 	mutex_lock(&ctrl->state_lock);  in pciehp_sysfs_disable_slot()
437 	switch (ctrl->state) {  in pciehp_sysfs_disable_slot()
440 		mutex_unlock(&ctrl->state_lock);  in pciehp_sysfs_disable_slot()
441 		pciehp_request(ctrl, DISABLE_SLOT);  in pciehp_sysfs_disable_slot()
442 		wait_event(ctrl->requester,  in pciehp_sysfs_disable_slot()
443 			   !atomic_read(&ctrl->pending_events) &&  in pciehp_sysfs_disable_slot()
444 			   !ctrl->ist_running);  in pciehp_sysfs_disable_slot()
445 		return ctrl->request_result;  in pciehp_sysfs_disable_slot()
447 		ctrl_info(ctrl, "Slot(%s): Already in powering off state\n",  in pciehp_sysfs_disable_slot()
448 			  slot_name(ctrl));  in pciehp_sysfs_disable_slot()
453 		ctrl_info(ctrl, "Slot(%s): Already disabled\n",  in pciehp_sysfs_disable_slot()
454 			  slot_name(ctrl));  in pciehp_sysfs_disable_slot()
457 		ctrl_err(ctrl, "Slot(%s): Invalid state %#x\n",  in pciehp_sysfs_disable_slot()
458 			 slot_name(ctrl), ctrl->state);  in pciehp_sysfs_disable_slot()
461 	mutex_unlock(&ctrl->state_lock);  in pciehp_sysfs_disable_slot()