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1/*
2 * PCI Express Hot Plug Controller Driver
3 *
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2003-2004 Intel Corporation
8 *
9 * All rights reserved.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
20 * details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
27 *
28 */
29
30#include <linux/module.h>
31#include <linux/moduleparam.h>
32#include <linux/kernel.h>
33#include <linux/slab.h>
34#include <linux/types.h>
35#include <linux/pci.h>
36#include "pciehp.h"
37#include <linux/interrupt.h>
38#include <linux/time.h>
39
40/* Global variables */
41int pciehp_debug;
42int pciehp_poll_mode;
43int pciehp_poll_time;
44int pciehp_force;
45struct workqueue_struct *pciehp_wq;
46struct workqueue_struct *pciehp_ordered_wq;
47
48#define DRIVER_VERSION "0.4"
49#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
50#define DRIVER_DESC "PCI Express Hot Plug Controller Driver"
51
52MODULE_AUTHOR(DRIVER_AUTHOR);
53MODULE_DESCRIPTION(DRIVER_DESC);
54MODULE_LICENSE("GPL");
55
56module_param(pciehp_debug, bool, 0644);
57module_param(pciehp_poll_mode, bool, 0644);
58module_param(pciehp_poll_time, int, 0644);
59module_param(pciehp_force, bool, 0644);
60MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
61MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
62MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
63MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
64
65#define PCIE_MODULE_NAME "pciehp"
66
67static int set_attention_status (struct hotplug_slot *slot, u8 value);
68static int enable_slot (struct hotplug_slot *slot);
69static int disable_slot (struct hotplug_slot *slot);
70static int get_power_status (struct hotplug_slot *slot, u8 *value);
71static int get_attention_status (struct hotplug_slot *slot, u8 *value);
72static int get_latch_status (struct hotplug_slot *slot, u8 *value);
73static int get_adapter_status (struct hotplug_slot *slot, u8 *value);
74
75/**
76 * release_slot - free up the memory used by a slot
77 * @hotplug_slot: slot to free
78 */
79static void release_slot(struct hotplug_slot *hotplug_slot)
80{
81 struct slot *slot = hotplug_slot->private;
82
83 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
84 __func__, hotplug_slot_name(hotplug_slot));
85
86 kfree(hotplug_slot->ops);
87 kfree(hotplug_slot->info);
88 kfree(hotplug_slot);
89}
90
91static int init_slot(struct controller *ctrl)
92{
93 struct slot *slot = ctrl->slot;
94 struct hotplug_slot *hotplug = NULL;
95 struct hotplug_slot_info *info = NULL;
96 struct hotplug_slot_ops *ops = NULL;
97 char name[SLOT_NAME_SIZE];
98 int retval = -ENOMEM;
99
100 hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
101 if (!hotplug)
102 goto out;
103
104 info = kzalloc(sizeof(*info), GFP_KERNEL);
105 if (!info)
106 goto out;
107
108 /* Setup hotplug slot ops */
109 ops = kzalloc(sizeof(*ops), GFP_KERNEL);
110 if (!ops)
111 goto out;
112 ops->enable_slot = enable_slot;
113 ops->disable_slot = disable_slot;
114 ops->get_power_status = get_power_status;
115 ops->get_adapter_status = get_adapter_status;
116 if (MRL_SENS(ctrl))
117 ops->get_latch_status = get_latch_status;
118 if (ATTN_LED(ctrl)) {
119 ops->get_attention_status = get_attention_status;
120 ops->set_attention_status = set_attention_status;
121 }
122
123 /* register this slot with the hotplug pci core */
124 hotplug->info = info;
125 hotplug->private = slot;
126 hotplug->release = &release_slot;
127 hotplug->ops = ops;
128 slot->hotplug_slot = hotplug;
129 snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
130
131 ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
132 pci_domain_nr(ctrl->pcie->port->subordinate),
133 ctrl->pcie->port->subordinate->number, PSN(ctrl));
134 retval = pci_hp_register(hotplug,
135 ctrl->pcie->port->subordinate, 0, name);
136 if (retval)
137 ctrl_err(ctrl,
138 "pci_hp_register failed with error %d\n", retval);
139out:
140 if (retval) {
141 kfree(ops);
142 kfree(info);
143 kfree(hotplug);
144 }
145 return retval;
146}
147
148static void cleanup_slot(struct controller *ctrl)
149{
150 pci_hp_deregister(ctrl->slot->hotplug_slot);
151}
152
153/*
154 * set_attention_status - Turns the Amber LED for a slot on, off or blink
155 */
156static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
157{
158 struct slot *slot = hotplug_slot->private;
159
160 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
161 __func__, slot_name(slot));
162
163 return pciehp_set_attention_status(slot, status);
164}
165
166
167static int enable_slot(struct hotplug_slot *hotplug_slot)
168{
169 struct slot *slot = hotplug_slot->private;
170
171 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
172 __func__, slot_name(slot));
173
174 return pciehp_sysfs_enable_slot(slot);
175}
176
177
178static int disable_slot(struct hotplug_slot *hotplug_slot)
179{
180 struct slot *slot = hotplug_slot->private;
181
182 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
183 __func__, slot_name(slot));
184
185 return pciehp_sysfs_disable_slot(slot);
186}
187
188static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
189{
190 struct slot *slot = hotplug_slot->private;
191
192 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
193 __func__, slot_name(slot));
194
195 return pciehp_get_power_status(slot, value);
196}
197
198static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
199{
200 struct slot *slot = hotplug_slot->private;
201
202 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
203 __func__, slot_name(slot));
204
205 return pciehp_get_attention_status(slot, value);
206}
207
208static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
209{
210 struct slot *slot = hotplug_slot->private;
211
212 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
213 __func__, slot_name(slot));
214
215 return pciehp_get_latch_status(slot, value);
216}
217
218static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
219{
220 struct slot *slot = hotplug_slot->private;
221
222 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
223 __func__, slot_name(slot));
224
225 return pciehp_get_adapter_status(slot, value);
226}
227
228static int pciehp_probe(struct pcie_device *dev)
229{
230 int rc;
231 struct controller *ctrl;
232 struct slot *slot;
233 u8 occupied, poweron;
234
235 if (pciehp_force)
236 dev_info(&dev->device,
237 "Bypassing BIOS check for pciehp use on %s\n",
238 pci_name(dev->port));
239 else if (pciehp_acpi_slot_detection_check(dev->port))
240 goto err_out_none;
241
242 ctrl = pcie_init(dev);
243 if (!ctrl) {
244 dev_err(&dev->device, "Controller initialization failed\n");
245 goto err_out_none;
246 }
247 set_service_data(dev, ctrl);
248
249 /* Setup the slot information structures */
250 rc = init_slot(ctrl);
251 if (rc) {
252 if (rc == -EBUSY)
253 ctrl_warn(ctrl, "Slot already registered by another "
254 "hotplug driver\n");
255 else
256 ctrl_err(ctrl, "Slot initialization failed\n");
257 goto err_out_release_ctlr;
258 }
259
260 /* Enable events after we have setup the data structures */
261 rc = pcie_init_notification(ctrl);
262 if (rc) {
263 ctrl_err(ctrl, "Notification initialization failed\n");
264 goto err_out_free_ctrl_slot;
265 }
266
267 /* Check if slot is occupied */
268 slot = ctrl->slot;
269 pciehp_get_adapter_status(slot, &occupied);
270 pciehp_get_power_status(slot, &poweron);
271 if (occupied && pciehp_force)
272 pciehp_enable_slot(slot);
273 /* If empty slot's power status is on, turn power off */
274 if (!occupied && poweron && POWER_CTRL(ctrl))
275 pciehp_power_off_slot(slot);
276
277 return 0;
278
279err_out_free_ctrl_slot:
280 cleanup_slot(ctrl);
281err_out_release_ctlr:
282 pciehp_release_ctrl(ctrl);
283err_out_none:
284 return -ENODEV;
285}
286
287static void pciehp_remove(struct pcie_device *dev)
288{
289 struct controller *ctrl = get_service_data(dev);
290
291 cleanup_slot(ctrl);
292 pciehp_release_ctrl(ctrl);
293}
294
295#ifdef CONFIG_PM
296static int pciehp_suspend (struct pcie_device *dev)
297{
298 dev_info(&dev->device, "%s ENTRY\n", __func__);
299 return 0;
300}
301
302static int pciehp_resume (struct pcie_device *dev)
303{
304 dev_info(&dev->device, "%s ENTRY\n", __func__);
305 if (pciehp_force) {
306 struct controller *ctrl = get_service_data(dev);
307 struct slot *slot;
308 u8 status;
309
310 /* reinitialize the chipset's event detection logic */
311 pcie_enable_notification(ctrl);
312
313 slot = ctrl->slot;
314
315 /* Check if slot is occupied */
316 pciehp_get_adapter_status(slot, &status);
317 if (status)
318 pciehp_enable_slot(slot);
319 else
320 pciehp_disable_slot(slot);
321 }
322 return 0;
323}
324#endif /* PM */
325
326static struct pcie_port_service_driver hpdriver_portdrv = {
327 .name = PCIE_MODULE_NAME,
328 .port_type = PCIE_ANY_PORT,
329 .service = PCIE_PORT_SERVICE_HP,
330
331 .probe = pciehp_probe,
332 .remove = pciehp_remove,
333
334#ifdef CONFIG_PM
335 .suspend = pciehp_suspend,
336 .resume = pciehp_resume,
337#endif /* PM */
338};
339
340static int __init pcied_init(void)
341{
342 int retval = 0;
343
344 pciehp_wq = alloc_workqueue("pciehp", 0, 0);
345 if (!pciehp_wq)
346 return -ENOMEM;
347
348 pciehp_ordered_wq = alloc_ordered_workqueue("pciehp_ordered", 0);
349 if (!pciehp_ordered_wq) {
350 destroy_workqueue(pciehp_wq);
351 return -ENOMEM;
352 }
353
354 pciehp_firmware_init();
355 retval = pcie_port_service_register(&hpdriver_portdrv);
356 dbg("pcie_port_service_register = %d\n", retval);
357 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
358 if (retval) {
359 destroy_workqueue(pciehp_ordered_wq);
360 destroy_workqueue(pciehp_wq);
361 dbg("Failure to register service\n");
362 }
363 return retval;
364}
365
366static void __exit pcied_cleanup(void)
367{
368 dbg("unload_pciehpd()\n");
369 destroy_workqueue(pciehp_ordered_wq);
370 destroy_workqueue(pciehp_wq);
371 pcie_port_service_unregister(&hpdriver_portdrv);
372 info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
373}
374
375module_init(pcied_init);
376module_exit(pcied_cleanup);
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * PCI Express Hot Plug Controller Driver
4 *
5 * Copyright (C) 1995,2001 Compaq Computer Corporation
6 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
7 * Copyright (C) 2001 IBM Corp.
8 * Copyright (C) 2003-2004 Intel Corporation
9 *
10 * All rights reserved.
11 *
12 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
13 *
14 * Authors:
15 * Dan Zink <dan.zink@compaq.com>
16 * Greg Kroah-Hartman <greg@kroah.com>
17 * Dely Sy <dely.l.sy@intel.com>"
18 */
19
20#define pr_fmt(fmt) "pciehp: " fmt
21#define dev_fmt pr_fmt
22
23#include <linux/moduleparam.h>
24#include <linux/kernel.h>
25#include <linux/slab.h>
26#include <linux/types.h>
27#include <linux/pci.h>
28#include "pciehp.h"
29
30#include "../pci.h"
31
32/* Global variables */
33bool pciehp_poll_mode;
34int pciehp_poll_time;
35
36/*
37 * not really modular, but the easiest way to keep compat with existing
38 * bootargs behaviour is to continue using module_param here.
39 */
40module_param(pciehp_poll_mode, bool, 0644);
41module_param(pciehp_poll_time, int, 0644);
42MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
43MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
44
45static int set_attention_status(struct hotplug_slot *slot, u8 value);
46static int get_power_status(struct hotplug_slot *slot, u8 *value);
47static int get_latch_status(struct hotplug_slot *slot, u8 *value);
48static int get_adapter_status(struct hotplug_slot *slot, u8 *value);
49
50static int init_slot(struct controller *ctrl)
51{
52 struct hotplug_slot_ops *ops;
53 char name[SLOT_NAME_SIZE];
54 int retval;
55
56 /* Setup hotplug slot ops */
57 ops = kzalloc(sizeof(*ops), GFP_KERNEL);
58 if (!ops)
59 return -ENOMEM;
60
61 ops->enable_slot = pciehp_sysfs_enable_slot;
62 ops->disable_slot = pciehp_sysfs_disable_slot;
63 ops->get_power_status = get_power_status;
64 ops->get_adapter_status = get_adapter_status;
65 ops->reset_slot = pciehp_reset_slot;
66 if (MRL_SENS(ctrl))
67 ops->get_latch_status = get_latch_status;
68 if (ATTN_LED(ctrl)) {
69 ops->get_attention_status = pciehp_get_attention_status;
70 ops->set_attention_status = set_attention_status;
71 } else if (ctrl->pcie->port->hotplug_user_indicators) {
72 ops->get_attention_status = pciehp_get_raw_indicator_status;
73 ops->set_attention_status = pciehp_set_raw_indicator_status;
74 }
75
76 /* register this slot with the hotplug pci core */
77 ctrl->hotplug_slot.ops = ops;
78 snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
79
80 retval = pci_hp_initialize(&ctrl->hotplug_slot,
81 ctrl->pcie->port->subordinate, 0, name);
82 if (retval) {
83 ctrl_err(ctrl, "pci_hp_initialize failed: error %d\n", retval);
84 kfree(ops);
85 }
86 return retval;
87}
88
89static void cleanup_slot(struct controller *ctrl)
90{
91 struct hotplug_slot *hotplug_slot = &ctrl->hotplug_slot;
92
93 pci_hp_destroy(hotplug_slot);
94 kfree(hotplug_slot->ops);
95}
96
97/*
98 * set_attention_status - Turns the Attention Indicator on, off or blinking
99 */
100static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
101{
102 struct controller *ctrl = to_ctrl(hotplug_slot);
103 struct pci_dev *pdev = ctrl->pcie->port;
104
105 if (status)
106 status <<= PCI_EXP_SLTCTL_ATTN_IND_SHIFT;
107 else
108 status = PCI_EXP_SLTCTL_ATTN_IND_OFF;
109
110 pci_config_pm_runtime_get(pdev);
111 pciehp_set_indicators(ctrl, INDICATOR_NOOP, status);
112 pci_config_pm_runtime_put(pdev);
113 return 0;
114}
115
116static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
117{
118 struct controller *ctrl = to_ctrl(hotplug_slot);
119 struct pci_dev *pdev = ctrl->pcie->port;
120
121 pci_config_pm_runtime_get(pdev);
122 pciehp_get_power_status(ctrl, value);
123 pci_config_pm_runtime_put(pdev);
124 return 0;
125}
126
127static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
128{
129 struct controller *ctrl = to_ctrl(hotplug_slot);
130 struct pci_dev *pdev = ctrl->pcie->port;
131
132 pci_config_pm_runtime_get(pdev);
133 pciehp_get_latch_status(ctrl, value);
134 pci_config_pm_runtime_put(pdev);
135 return 0;
136}
137
138static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
139{
140 struct controller *ctrl = to_ctrl(hotplug_slot);
141 struct pci_dev *pdev = ctrl->pcie->port;
142 int ret;
143
144 pci_config_pm_runtime_get(pdev);
145 ret = pciehp_card_present_or_link_active(ctrl);
146 pci_config_pm_runtime_put(pdev);
147 if (ret < 0)
148 return ret;
149
150 *value = ret;
151 return 0;
152}
153
154/**
155 * pciehp_check_presence() - synthesize event if presence has changed
156 * @ctrl: controller to check
157 *
158 * On probe and resume, an explicit presence check is necessary to bring up an
159 * occupied slot or bring down an unoccupied slot. This can't be triggered by
160 * events in the Slot Status register, they may be stale and are therefore
161 * cleared. Secondly, sending an interrupt for "events that occur while
162 * interrupt generation is disabled [when] interrupt generation is subsequently
163 * enabled" is optional per PCIe r4.0, sec 6.7.3.4.
164 */
165static void pciehp_check_presence(struct controller *ctrl)
166{
167 int occupied;
168
169 down_read(&ctrl->reset_lock);
170 mutex_lock(&ctrl->state_lock);
171
172 occupied = pciehp_card_present_or_link_active(ctrl);
173 if ((occupied > 0 && (ctrl->state == OFF_STATE ||
174 ctrl->state == BLINKINGON_STATE)) ||
175 (!occupied && (ctrl->state == ON_STATE ||
176 ctrl->state == BLINKINGOFF_STATE)))
177 pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC);
178
179 mutex_unlock(&ctrl->state_lock);
180 up_read(&ctrl->reset_lock);
181}
182
183static int pciehp_probe(struct pcie_device *dev)
184{
185 int rc;
186 struct controller *ctrl;
187
188 /* If this is not a "hotplug" service, we have no business here. */
189 if (dev->service != PCIE_PORT_SERVICE_HP)
190 return -ENODEV;
191
192 if (!dev->port->subordinate) {
193 /* Can happen if we run out of bus numbers during probe */
194 pci_err(dev->port,
195 "Hotplug bridge without secondary bus, ignoring\n");
196 return -ENODEV;
197 }
198
199 ctrl = pcie_init(dev);
200 if (!ctrl) {
201 pci_err(dev->port, "Controller initialization failed\n");
202 return -ENODEV;
203 }
204 set_service_data(dev, ctrl);
205
206 /* Setup the slot information structures */
207 rc = init_slot(ctrl);
208 if (rc) {
209 if (rc == -EBUSY)
210 ctrl_warn(ctrl, "Slot already registered by another hotplug driver\n");
211 else
212 ctrl_err(ctrl, "Slot initialization failed (%d)\n", rc);
213 goto err_out_release_ctlr;
214 }
215
216 /* Enable events after we have setup the data structures */
217 rc = pcie_init_notification(ctrl);
218 if (rc) {
219 ctrl_err(ctrl, "Notification initialization failed (%d)\n", rc);
220 goto err_out_free_ctrl_slot;
221 }
222
223 /* Publish to user space */
224 rc = pci_hp_add(&ctrl->hotplug_slot);
225 if (rc) {
226 ctrl_err(ctrl, "Publication to user space failed (%d)\n", rc);
227 goto err_out_shutdown_notification;
228 }
229
230 pciehp_check_presence(ctrl);
231
232 return 0;
233
234err_out_shutdown_notification:
235 pcie_shutdown_notification(ctrl);
236err_out_free_ctrl_slot:
237 cleanup_slot(ctrl);
238err_out_release_ctlr:
239 pciehp_release_ctrl(ctrl);
240 return -ENODEV;
241}
242
243static void pciehp_remove(struct pcie_device *dev)
244{
245 struct controller *ctrl = get_service_data(dev);
246
247 pci_hp_del(&ctrl->hotplug_slot);
248 pcie_shutdown_notification(ctrl);
249 cleanup_slot(ctrl);
250 pciehp_release_ctrl(ctrl);
251}
252
253#ifdef CONFIG_PM
254static bool pme_is_native(struct pcie_device *dev)
255{
256 const struct pci_host_bridge *host;
257
258 host = pci_find_host_bridge(dev->port->bus);
259 return pcie_ports_native || host->native_pme;
260}
261
262static void pciehp_disable_interrupt(struct pcie_device *dev)
263{
264 /*
265 * Disable hotplug interrupt so that it does not trigger
266 * immediately when the downstream link goes down.
267 */
268 if (pme_is_native(dev))
269 pcie_disable_interrupt(get_service_data(dev));
270}
271
272#ifdef CONFIG_PM_SLEEP
273static int pciehp_suspend(struct pcie_device *dev)
274{
275 /*
276 * If the port is already runtime suspended we can keep it that
277 * way.
278 */
279 if (dev_pm_skip_suspend(&dev->port->dev))
280 return 0;
281
282 pciehp_disable_interrupt(dev);
283 return 0;
284}
285
286static int pciehp_resume_noirq(struct pcie_device *dev)
287{
288 struct controller *ctrl = get_service_data(dev);
289
290 /* pci_restore_state() just wrote to the Slot Control register */
291 ctrl->cmd_started = jiffies;
292 ctrl->cmd_busy = true;
293
294 /* clear spurious events from rediscovery of inserted card */
295 if (ctrl->state == ON_STATE || ctrl->state == BLINKINGOFF_STATE)
296 pcie_clear_hotplug_events(ctrl);
297
298 return 0;
299}
300#endif
301
302static int pciehp_resume(struct pcie_device *dev)
303{
304 struct controller *ctrl = get_service_data(dev);
305
306 if (pme_is_native(dev))
307 pcie_enable_interrupt(ctrl);
308
309 pciehp_check_presence(ctrl);
310
311 return 0;
312}
313
314static int pciehp_runtime_suspend(struct pcie_device *dev)
315{
316 pciehp_disable_interrupt(dev);
317 return 0;
318}
319
320static int pciehp_runtime_resume(struct pcie_device *dev)
321{
322 struct controller *ctrl = get_service_data(dev);
323
324 /* pci_restore_state() just wrote to the Slot Control register */
325 ctrl->cmd_started = jiffies;
326 ctrl->cmd_busy = true;
327
328 /* clear spurious events from rediscovery of inserted card */
329 if ((ctrl->state == ON_STATE || ctrl->state == BLINKINGOFF_STATE) &&
330 pme_is_native(dev))
331 pcie_clear_hotplug_events(ctrl);
332
333 return pciehp_resume(dev);
334}
335#endif /* PM */
336
337static struct pcie_port_service_driver hpdriver_portdrv = {
338 .name = "pciehp",
339 .port_type = PCIE_ANY_PORT,
340 .service = PCIE_PORT_SERVICE_HP,
341
342 .probe = pciehp_probe,
343 .remove = pciehp_remove,
344
345#ifdef CONFIG_PM
346#ifdef CONFIG_PM_SLEEP
347 .suspend = pciehp_suspend,
348 .resume_noirq = pciehp_resume_noirq,
349 .resume = pciehp_resume,
350#endif
351 .runtime_suspend = pciehp_runtime_suspend,
352 .runtime_resume = pciehp_runtime_resume,
353#endif /* PM */
354};
355
356int __init pcie_hp_init(void)
357{
358 int retval = 0;
359
360 retval = pcie_port_service_register(&hpdriver_portdrv);
361 pr_debug("pcie_port_service_register = %d\n", retval);
362 if (retval)
363 pr_debug("Failure to register service\n");
364
365 return retval;
366}