33 static void set_slot_off(struct controller *ctrl)  in set_slot_off()  argument
39 	if (POWER_CTRL(ctrl)) {  in set_slot_off()
40 		pciehp_power_off_slot(ctrl);  in set_slot_off()
50 	pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in set_slot_off()
56  * @ctrl: PCIe hotplug controller where board is added
61 static int board_added(struct controller *ctrl)  in board_added()  argument
64 	struct pci_bus *parent = ctrl->pcie->port->subordinate;  in board_added()
66 	if (POWER_CTRL(ctrl)) {  in board_added()
68 		retval = pciehp_power_on_slot(ctrl);  in board_added()
73 	pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK,  in board_added()
77 	retval = pciehp_check_link_status(ctrl);  in board_added()
82 	if (ctrl->power_fault_detected || pciehp_query_power_fault(ctrl)) {  in board_added()
83 		ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl));  in board_added()
88 	retval = pciehp_configure_device(ctrl);  in board_added()
91 			ctrl_err(ctrl, "Cannot add device at %04x:%02x:00\n",  in board_added()
97 	pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON,  in board_added()
102 	set_slot_off(ctrl);  in board_added()
108  * @ctrl: PCIe hotplug controller where board is being removed
111 static void remove_board(struct controller *ctrl, bool safe_removal)  in remove_board()  argument
113 	pciehp_unconfigure_device(ctrl, safe_removal);  in remove_board()
115 	if (POWER_CTRL(ctrl)) {  in remove_board()
116 		pciehp_power_off_slot(ctrl);  in remove_board()
127 			   &ctrl->pending_events);  in remove_board()
130 	pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in remove_board()
134 	pcie_reset_lbms_count(ctrl->pcie->port);  in remove_board()
137 static int pciehp_enable_slot(struct controller *ctrl);
138 static int pciehp_disable_slot(struct controller *ctrl, bool safe_removal);
140 void pciehp_request(struct controller *ctrl, int action)  in pciehp_request()  argument
142 	atomic_or(action, &ctrl->pending_events);  in pciehp_request()
144 		irq_wake_thread(ctrl->pcie->irq, ctrl);  in pciehp_request()
149 	struct controller *ctrl = container_of(work, struct controller,  in pciehp_queue_pushbutton_work()  local
152 	mutex_lock(&ctrl->state_lock);  in pciehp_queue_pushbutton_work()
153 	switch (ctrl->state) {  in pciehp_queue_pushbutton_work()
155 		pciehp_request(ctrl, DISABLE_SLOT);  in pciehp_queue_pushbutton_work()
158 		pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC);  in pciehp_queue_pushbutton_work()
163 	mutex_unlock(&ctrl->state_lock);  in pciehp_queue_pushbutton_work()
166 void pciehp_handle_button_press(struct controller *ctrl)  in pciehp_handle_button_press()  argument
168 	mutex_lock(&ctrl->state_lock);  in pciehp_handle_button_press()
169 	switch (ctrl->state) {  in pciehp_handle_button_press()
172 		if (ctrl->state == ON_STATE) {  in pciehp_handle_button_press()
173 			ctrl->state = BLINKINGOFF_STATE;  in pciehp_handle_button_press()
174 			ctrl_info(ctrl, "Slot(%s): Button press: will power off in 5 sec\n",  in pciehp_handle_button_press()
175 				  slot_name(ctrl));  in pciehp_handle_button_press()
177 			ctrl->state = BLINKINGON_STATE;  in pciehp_handle_button_press()
178 			ctrl_info(ctrl, "Slot(%s): Button press: will power on in 5 sec\n",  in pciehp_handle_button_press()
179 				  slot_name(ctrl));  in pciehp_handle_button_press()
182 		pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_BLINK,  in pciehp_handle_button_press()
184 		schedule_delayed_work(&ctrl->button_work, 5 * HZ);  in pciehp_handle_button_press()
193 		cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_button_press()
194 		if (ctrl->state == BLINKINGOFF_STATE) {  in pciehp_handle_button_press()
195 			ctrl->state = ON_STATE;  in pciehp_handle_button_press()
196 			pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_ON,  in pciehp_handle_button_press()
198 			ctrl_info(ctrl, "Slot(%s): Button press: canceling request to power off\n",  in pciehp_handle_button_press()
199 				  slot_name(ctrl));  in pciehp_handle_button_press()
201 			ctrl->state = OFF_STATE;  in pciehp_handle_button_press()
202 			pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in pciehp_handle_button_press()
204 			ctrl_info(ctrl, "Slot(%s): Button press: canceling request to power on\n",  in pciehp_handle_button_press()
205 				  slot_name(ctrl));  in pciehp_handle_button_press()
209 		ctrl_err(ctrl, "Slot(%s): Button press: ignoring invalid state %#x\n",  in pciehp_handle_button_press()
210 			 slot_name(ctrl), ctrl->state);  in pciehp_handle_button_press()
213 	mutex_unlock(&ctrl->state_lock);  in pciehp_handle_button_press()
216 void pciehp_handle_disable_request(struct controller *ctrl)  in pciehp_handle_disable_request()  argument
218 	mutex_lock(&ctrl->state_lock);  in pciehp_handle_disable_request()
219 	switch (ctrl->state) {  in pciehp_handle_disable_request()
222 		cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_disable_request()
225 	ctrl->state = POWEROFF_STATE;  in pciehp_handle_disable_request()
226 	mutex_unlock(&ctrl->state_lock);  in pciehp_handle_disable_request()
228 	ctrl->request_result = pciehp_disable_slot(ctrl, SAFE_REMOVAL);  in pciehp_handle_disable_request()
231 void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events)  in pciehp_handle_presence_or_link_change()  argument
239 	mutex_lock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
240 	switch (ctrl->state) {  in pciehp_handle_presence_or_link_change()
242 		cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_presence_or_link_change()
245 		ctrl->state = POWEROFF_STATE;  in pciehp_handle_presence_or_link_change()
246 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
248 			ctrl_info(ctrl, "Slot(%s): Link Down\n",  in pciehp_handle_presence_or_link_change()
249 				  slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
251 			ctrl_info(ctrl, "Slot(%s): Card not present\n",  in pciehp_handle_presence_or_link_change()
252 				  slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
253 		pciehp_disable_slot(ctrl, SURPRISE_REMOVAL);  in pciehp_handle_presence_or_link_change()
256 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
261 	mutex_lock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
262 	present = pciehp_card_present(ctrl);  in pciehp_handle_presence_or_link_change()
263 	link_active = pciehp_check_link_active(ctrl);  in pciehp_handle_presence_or_link_change()
265 		if (ctrl->state == BLINKINGON_STATE) {  in pciehp_handle_presence_or_link_change()
266 			ctrl->state = OFF_STATE;  in pciehp_handle_presence_or_link_change()
267 			cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_presence_or_link_change()
268 			pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in pciehp_handle_presence_or_link_change()
270 			ctrl_info(ctrl, "Slot(%s): Card not present\n",  in pciehp_handle_presence_or_link_change()
271 				  slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
273 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
277 	switch (ctrl->state) {  in pciehp_handle_presence_or_link_change()
279 		cancel_delayed_work(&ctrl->button_work);  in pciehp_handle_presence_or_link_change()
282 		ctrl->state = POWERON_STATE;  in pciehp_handle_presence_or_link_change()
283 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
285 			ctrl_info(ctrl, "Slot(%s): Card present\n",  in pciehp_handle_presence_or_link_change()
286 				  slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
288 			ctrl_info(ctrl, "Slot(%s): Link Up\n",  in pciehp_handle_presence_or_link_change()
289 				  slot_name(ctrl));  in pciehp_handle_presence_or_link_change()
290 		ctrl->request_result = pciehp_enable_slot(ctrl);  in pciehp_handle_presence_or_link_change()
293 		mutex_unlock(&ctrl->state_lock);  in pciehp_handle_presence_or_link_change()
298 static int __pciehp_enable_slot(struct controller *ctrl)  in __pciehp_enable_slot()  argument
302 	if (MRL_SENS(ctrl)) {  in __pciehp_enable_slot()
303 		pciehp_get_latch_status(ctrl, &getstatus);  in __pciehp_enable_slot()
305 			ctrl_info(ctrl, "Slot(%s): Latch open\n",  in __pciehp_enable_slot()
306 				  slot_name(ctrl));  in __pciehp_enable_slot()
311 	if (POWER_CTRL(ctrl)) {  in __pciehp_enable_slot()
312 		pciehp_get_power_status(ctrl, &getstatus);  in __pciehp_enable_slot()
314 			ctrl_info(ctrl, "Slot(%s): Already enabled\n",  in __pciehp_enable_slot()
315 				  slot_name(ctrl));  in __pciehp_enable_slot()
320 	return board_added(ctrl);  in __pciehp_enable_slot()
323 static int pciehp_enable_slot(struct controller *ctrl)  in pciehp_enable_slot()  argument
327 	pm_runtime_get_sync(&ctrl->pcie->port->dev);  in pciehp_enable_slot()
328 	ret = __pciehp_enable_slot(ctrl);  in pciehp_enable_slot()
329 	if (ret && ATTN_BUTTN(ctrl))  in pciehp_enable_slot()
331 		pciehp_set_indicators(ctrl, PCI_EXP_SLTCTL_PWR_IND_OFF,  in pciehp_enable_slot()
333 	pm_runtime_put(&ctrl->pcie->port->dev);  in pciehp_enable_slot()
335 	mutex_lock(&ctrl->state_lock);  in pciehp_enable_slot()
336 	ctrl->state = ret ? OFF_STATE : ON_STATE;  in pciehp_enable_slot()
337 	mutex_unlock(&ctrl->state_lock);  in pciehp_enable_slot()
342 static int __pciehp_disable_slot(struct controller *ctrl, bool safe_removal)  in __pciehp_disable_slot()  argument
346 	if (POWER_CTRL(ctrl)) {  in __pciehp_disable_slot()
347 		pciehp_get_power_status(ctrl, &getstatus);  in __pciehp_disable_slot()
349 			ctrl_info(ctrl, "Slot(%s): Already disabled\n",  in __pciehp_disable_slot()
350 				  slot_name(ctrl));  in __pciehp_disable_slot()
355 	remove_board(ctrl, safe_removal);  in __pciehp_disable_slot()
359 static int pciehp_disable_slot(struct controller *ctrl, bool safe_removal)  in pciehp_disable_slot()  argument
363 	pm_runtime_get_sync(&ctrl->pcie->port->dev);  in pciehp_disable_slot()
364 	ret = __pciehp_disable_slot(ctrl, safe_removal);  in pciehp_disable_slot()
365 	pm_runtime_put(&ctrl->pcie->port->dev);  in pciehp_disable_slot()
367 	mutex_lock(&ctrl->state_lock);  in pciehp_disable_slot()
368 	ctrl->state = OFF_STATE;  in pciehp_disable_slot()
369 	mutex_unlock(&ctrl->state_lock);  in pciehp_disable_slot()
376 	struct controller *ctrl = to_ctrl(hotplug_slot);  in pciehp_sysfs_enable_slot()  local
378 	mutex_lock(&ctrl->state_lock);  in pciehp_sysfs_enable_slot()
379 	switch (ctrl->state) {  in pciehp_sysfs_enable_slot()
382 		mutex_unlock(&ctrl->state_lock);  in pciehp_sysfs_enable_slot()
387 		ctrl->request_result = -ENODEV;  in pciehp_sysfs_enable_slot()
388 		pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC);  in pciehp_sysfs_enable_slot()
389 		wait_event(ctrl->requester,  in pciehp_sysfs_enable_slot()
390 			   !atomic_read(&ctrl->pending_events) &&  in pciehp_sysfs_enable_slot()
391 			   !ctrl->ist_running);  in pciehp_sysfs_enable_slot()
392 		return ctrl->request_result;  in pciehp_sysfs_enable_slot()
394 		ctrl_info(ctrl, "Slot(%s): Already in powering on state\n",  in pciehp_sysfs_enable_slot()
395 			  slot_name(ctrl));  in pciehp_sysfs_enable_slot()
400 		ctrl_info(ctrl, "Slot(%s): Already enabled\n",  in pciehp_sysfs_enable_slot()
401 			  slot_name(ctrl));  in pciehp_sysfs_enable_slot()
404 		ctrl_err(ctrl, "Slot(%s): Invalid state %#x\n",  in pciehp_sysfs_enable_slot()
405 			 slot_name(ctrl), ctrl->state);  in pciehp_sysfs_enable_slot()
408 	mutex_unlock(&ctrl->state_lock);  in pciehp_sysfs_enable_slot()
415 	struct controller *ctrl = to_ctrl(hotplug_slot);  in pciehp_sysfs_disable_slot()  local
417 	mutex_lock(&ctrl->state_lock);  in pciehp_sysfs_disable_slot()
418 	switch (ctrl->state) {  in pciehp_sysfs_disable_slot()
421 		mutex_unlock(&ctrl->state_lock);  in pciehp_sysfs_disable_slot()
422 		pciehp_request(ctrl, DISABLE_SLOT);  in pciehp_sysfs_disable_slot()
423 		wait_event(ctrl->requester,  in pciehp_sysfs_disable_slot()
424 			   !atomic_read(&ctrl->pending_events) &&  in pciehp_sysfs_disable_slot()
425 			   !ctrl->ist_running);  in pciehp_sysfs_disable_slot()
426 		return ctrl->request_result;  in pciehp_sysfs_disable_slot()
428 		ctrl_info(ctrl, "Slot(%s): Already in powering off state\n",  in pciehp_sysfs_disable_slot()
429 			  slot_name(ctrl));  in pciehp_sysfs_disable_slot()
434 		ctrl_info(ctrl, "Slot(%s): Already disabled\n",  in pciehp_sysfs_disable_slot()
435 			  slot_name(ctrl));  in pciehp_sysfs_disable_slot()
438 		ctrl_err(ctrl, "Slot(%s): Invalid state %#x\n",  in pciehp_sysfs_disable_slot()
439 			 slot_name(ctrl), ctrl->state);  in pciehp_sysfs_disable_slot()
442 	mutex_unlock(&ctrl->state_lock);  in pciehp_sysfs_disable_slot()