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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 */
41bool pciehp_debug;
42bool pciehp_poll_mode;
43int pciehp_poll_time;
44bool pciehp_force;
45struct workqueue_struct *pciehp_wq;
46
47#define DRIVER_VERSION "0.4"
48#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
49#define DRIVER_DESC "PCI Express Hot Plug Controller Driver"
50
51MODULE_AUTHOR(DRIVER_AUTHOR);
52MODULE_DESCRIPTION(DRIVER_DESC);
53MODULE_LICENSE("GPL");
54
55module_param(pciehp_debug, bool, 0644);
56module_param(pciehp_poll_mode, bool, 0644);
57module_param(pciehp_poll_time, int, 0644);
58module_param(pciehp_force, bool, 0644);
59MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
60MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
61MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
62MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
63
64#define PCIE_MODULE_NAME "pciehp"
65
66static int set_attention_status (struct hotplug_slot *slot, u8 value);
67static int enable_slot (struct hotplug_slot *slot);
68static int disable_slot (struct hotplug_slot *slot);
69static int get_power_status (struct hotplug_slot *slot, u8 *value);
70static int get_attention_status (struct hotplug_slot *slot, u8 *value);
71static int get_latch_status (struct hotplug_slot *slot, u8 *value);
72static int get_adapter_status (struct hotplug_slot *slot, u8 *value);
73
74/**
75 * release_slot - free up the memory used by a slot
76 * @hotplug_slot: slot to free
77 */
78static void release_slot(struct hotplug_slot *hotplug_slot)
79{
80 struct slot *slot = hotplug_slot->private;
81
82 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
83 __func__, hotplug_slot_name(hotplug_slot));
84
85 kfree(hotplug_slot->ops);
86 kfree(hotplug_slot->info);
87 kfree(hotplug_slot);
88}
89
90static int init_slot(struct controller *ctrl)
91{
92 struct slot *slot = ctrl->slot;
93 struct hotplug_slot *hotplug = NULL;
94 struct hotplug_slot_info *info = NULL;
95 struct hotplug_slot_ops *ops = NULL;
96 char name[SLOT_NAME_SIZE];
97 int retval = -ENOMEM;
98
99 hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
100 if (!hotplug)
101 goto out;
102
103 info = kzalloc(sizeof(*info), GFP_KERNEL);
104 if (!info)
105 goto out;
106
107 /* Setup hotplug slot ops */
108 ops = kzalloc(sizeof(*ops), GFP_KERNEL);
109 if (!ops)
110 goto out;
111 ops->enable_slot = enable_slot;
112 ops->disable_slot = disable_slot;
113 ops->get_power_status = get_power_status;
114 ops->get_adapter_status = get_adapter_status;
115 if (MRL_SENS(ctrl))
116 ops->get_latch_status = get_latch_status;
117 if (ATTN_LED(ctrl)) {
118 ops->get_attention_status = get_attention_status;
119 ops->set_attention_status = set_attention_status;
120 }
121
122 /* register this slot with the hotplug pci core */
123 hotplug->info = info;
124 hotplug->private = slot;
125 hotplug->release = &release_slot;
126 hotplug->ops = ops;
127 slot->hotplug_slot = hotplug;
128 snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
129
130 ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
131 pci_domain_nr(ctrl->pcie->port->subordinate),
132 ctrl->pcie->port->subordinate->number, PSN(ctrl));
133 retval = pci_hp_register(hotplug,
134 ctrl->pcie->port->subordinate, 0, name);
135 if (retval)
136 ctrl_err(ctrl,
137 "pci_hp_register failed with error %d\n", retval);
138out:
139 if (retval) {
140 kfree(ops);
141 kfree(info);
142 kfree(hotplug);
143 }
144 return retval;
145}
146
147static void cleanup_slot(struct controller *ctrl)
148{
149 pci_hp_deregister(ctrl->slot->hotplug_slot);
150}
151
152/*
153 * set_attention_status - Turns the Amber LED for a slot on, off or blink
154 */
155static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
156{
157 struct slot *slot = hotplug_slot->private;
158
159 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
160 __func__, slot_name(slot));
161
162 return pciehp_set_attention_status(slot, status);
163}
164
165
166static int enable_slot(struct hotplug_slot *hotplug_slot)
167{
168 struct slot *slot = hotplug_slot->private;
169
170 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
171 __func__, slot_name(slot));
172
173 return pciehp_sysfs_enable_slot(slot);
174}
175
176
177static int disable_slot(struct hotplug_slot *hotplug_slot)
178{
179 struct slot *slot = hotplug_slot->private;
180
181 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
182 __func__, slot_name(slot));
183
184 return pciehp_sysfs_disable_slot(slot);
185}
186
187static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
188{
189 struct slot *slot = hotplug_slot->private;
190
191 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
192 __func__, slot_name(slot));
193
194 return pciehp_get_power_status(slot, value);
195}
196
197static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
198{
199 struct slot *slot = hotplug_slot->private;
200
201 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
202 __func__, slot_name(slot));
203
204 return pciehp_get_attention_status(slot, value);
205}
206
207static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
208{
209 struct slot *slot = hotplug_slot->private;
210
211 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
212 __func__, slot_name(slot));
213
214 return pciehp_get_latch_status(slot, value);
215}
216
217static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
218{
219 struct slot *slot = hotplug_slot->private;
220
221 ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
222 __func__, slot_name(slot));
223
224 return pciehp_get_adapter_status(slot, value);
225}
226
227static int pciehp_probe(struct pcie_device *dev)
228{
229 int rc;
230 struct controller *ctrl;
231 struct slot *slot;
232 u8 occupied, poweron;
233
234 if (pciehp_force)
235 dev_info(&dev->device,
236 "Bypassing BIOS check for pciehp use on %s\n",
237 pci_name(dev->port));
238 else if (pciehp_acpi_slot_detection_check(dev->port))
239 goto err_out_none;
240
241 ctrl = pcie_init(dev);
242 if (!ctrl) {
243 dev_err(&dev->device, "Controller initialization failed\n");
244 goto err_out_none;
245 }
246 set_service_data(dev, ctrl);
247
248 /* Setup the slot information structures */
249 rc = init_slot(ctrl);
250 if (rc) {
251 if (rc == -EBUSY)
252 ctrl_warn(ctrl, "Slot already registered by another "
253 "hotplug driver\n");
254 else
255 ctrl_err(ctrl, "Slot initialization failed\n");
256 goto err_out_release_ctlr;
257 }
258
259 /* Enable events after we have setup the data structures */
260 rc = pcie_init_notification(ctrl);
261 if (rc) {
262 ctrl_err(ctrl, "Notification initialization failed\n");
263 goto err_out_free_ctrl_slot;
264 }
265
266 /* Check if slot is occupied */
267 slot = ctrl->slot;
268 pciehp_get_adapter_status(slot, &occupied);
269 pciehp_get_power_status(slot, &poweron);
270 if (occupied && pciehp_force)
271 pciehp_enable_slot(slot);
272 /* If empty slot's power status is on, turn power off */
273 if (!occupied && poweron && POWER_CTRL(ctrl))
274 pciehp_power_off_slot(slot);
275
276 return 0;
277
278err_out_free_ctrl_slot:
279 cleanup_slot(ctrl);
280err_out_release_ctlr:
281 pciehp_release_ctrl(ctrl);
282err_out_none:
283 return -ENODEV;
284}
285
286static void pciehp_remove(struct pcie_device *dev)
287{
288 struct controller *ctrl = get_service_data(dev);
289
290 cleanup_slot(ctrl);
291 pciehp_release_ctrl(ctrl);
292}
293
294#ifdef CONFIG_PM
295static int pciehp_suspend (struct pcie_device *dev)
296{
297 dev_info(&dev->device, "%s ENTRY\n", __func__);
298 return 0;
299}
300
301static int pciehp_resume (struct pcie_device *dev)
302{
303 dev_info(&dev->device, "%s ENTRY\n", __func__);
304 if (pciehp_force) {
305 struct controller *ctrl = get_service_data(dev);
306 struct slot *slot;
307 u8 status;
308
309 /* reinitialize the chipset's event detection logic */
310 pcie_enable_notification(ctrl);
311
312 slot = ctrl->slot;
313
314 /* Check if slot is occupied */
315 pciehp_get_adapter_status(slot, &status);
316 if (status)
317 pciehp_enable_slot(slot);
318 else
319 pciehp_disable_slot(slot);
320 }
321 return 0;
322}
323#endif /* PM */
324
325static struct pcie_port_service_driver hpdriver_portdrv = {
326 .name = PCIE_MODULE_NAME,
327 .port_type = PCIE_ANY_PORT,
328 .service = PCIE_PORT_SERVICE_HP,
329
330 .probe = pciehp_probe,
331 .remove = pciehp_remove,
332
333#ifdef CONFIG_PM
334 .suspend = pciehp_suspend,
335 .resume = pciehp_resume,
336#endif /* PM */
337};
338
339static int __init pcied_init(void)
340{
341 int retval = 0;
342
343 pciehp_wq = alloc_workqueue("pciehp", 0, 0);
344 if (!pciehp_wq)
345 return -ENOMEM;
346
347 pciehp_firmware_init();
348 retval = pcie_port_service_register(&hpdriver_portdrv);
349 dbg("pcie_port_service_register = %d\n", retval);
350 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
351 if (retval) {
352 destroy_workqueue(pciehp_wq);
353 dbg("Failure to register service\n");
354 }
355 return retval;
356}
357
358static void __exit pcied_cleanup(void)
359{
360 dbg("unload_pciehpd()\n");
361 pcie_port_service_unregister(&hpdriver_portdrv);
362 destroy_workqueue(pciehp_wq);
363 info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
364}
365
366module_init(pcied_init);
367module_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
143 pci_config_pm_runtime_get(pdev);
144 *value = pciehp_card_present_or_link_active(ctrl);
145 pci_config_pm_runtime_put(pdev);
146 return 0;
147}
148
149/**
150 * pciehp_check_presence() - synthesize event if presence has changed
151 *
152 * On probe and resume, an explicit presence check is necessary to bring up an
153 * occupied slot or bring down an unoccupied slot. This can't be triggered by
154 * events in the Slot Status register, they may be stale and are therefore
155 * cleared. Secondly, sending an interrupt for "events that occur while
156 * interrupt generation is disabled [when] interrupt generation is subsequently
157 * enabled" is optional per PCIe r4.0, sec 6.7.3.4.
158 */
159static void pciehp_check_presence(struct controller *ctrl)
160{
161 bool occupied;
162
163 down_read(&ctrl->reset_lock);
164 mutex_lock(&ctrl->state_lock);
165
166 occupied = pciehp_card_present_or_link_active(ctrl);
167 if ((occupied && (ctrl->state == OFF_STATE ||
168 ctrl->state == BLINKINGON_STATE)) ||
169 (!occupied && (ctrl->state == ON_STATE ||
170 ctrl->state == BLINKINGOFF_STATE)))
171 pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC);
172
173 mutex_unlock(&ctrl->state_lock);
174 up_read(&ctrl->reset_lock);
175}
176
177static int pciehp_probe(struct pcie_device *dev)
178{
179 int rc;
180 struct controller *ctrl;
181
182 /* If this is not a "hotplug" service, we have no business here. */
183 if (dev->service != PCIE_PORT_SERVICE_HP)
184 return -ENODEV;
185
186 if (!dev->port->subordinate) {
187 /* Can happen if we run out of bus numbers during probe */
188 pci_err(dev->port,
189 "Hotplug bridge without secondary bus, ignoring\n");
190 return -ENODEV;
191 }
192
193 ctrl = pcie_init(dev);
194 if (!ctrl) {
195 pci_err(dev->port, "Controller initialization failed\n");
196 return -ENODEV;
197 }
198 set_service_data(dev, ctrl);
199
200 /* Setup the slot information structures */
201 rc = init_slot(ctrl);
202 if (rc) {
203 if (rc == -EBUSY)
204 ctrl_warn(ctrl, "Slot already registered by another hotplug driver\n");
205 else
206 ctrl_err(ctrl, "Slot initialization failed (%d)\n", rc);
207 goto err_out_release_ctlr;
208 }
209
210 /* Enable events after we have setup the data structures */
211 rc = pcie_init_notification(ctrl);
212 if (rc) {
213 ctrl_err(ctrl, "Notification initialization failed (%d)\n", rc);
214 goto err_out_free_ctrl_slot;
215 }
216
217 /* Publish to user space */
218 rc = pci_hp_add(&ctrl->hotplug_slot);
219 if (rc) {
220 ctrl_err(ctrl, "Publication to user space failed (%d)\n", rc);
221 goto err_out_shutdown_notification;
222 }
223
224 pciehp_check_presence(ctrl);
225
226 return 0;
227
228err_out_shutdown_notification:
229 pcie_shutdown_notification(ctrl);
230err_out_free_ctrl_slot:
231 cleanup_slot(ctrl);
232err_out_release_ctlr:
233 pciehp_release_ctrl(ctrl);
234 return -ENODEV;
235}
236
237static void pciehp_remove(struct pcie_device *dev)
238{
239 struct controller *ctrl = get_service_data(dev);
240
241 pci_hp_del(&ctrl->hotplug_slot);
242 pcie_shutdown_notification(ctrl);
243 cleanup_slot(ctrl);
244 pciehp_release_ctrl(ctrl);
245}
246
247#ifdef CONFIG_PM
248static bool pme_is_native(struct pcie_device *dev)
249{
250 const struct pci_host_bridge *host;
251
252 host = pci_find_host_bridge(dev->port->bus);
253 return pcie_ports_native || host->native_pme;
254}
255
256static int pciehp_suspend(struct pcie_device *dev)
257{
258 /*
259 * Disable hotplug interrupt so that it does not trigger
260 * immediately when the downstream link goes down.
261 */
262 if (pme_is_native(dev))
263 pcie_disable_interrupt(get_service_data(dev));
264
265 return 0;
266}
267
268static int pciehp_resume_noirq(struct pcie_device *dev)
269{
270 struct controller *ctrl = get_service_data(dev);
271
272 /* pci_restore_state() just wrote to the Slot Control register */
273 ctrl->cmd_started = jiffies;
274 ctrl->cmd_busy = true;
275
276 /* clear spurious events from rediscovery of inserted card */
277 if (ctrl->state == ON_STATE || ctrl->state == BLINKINGOFF_STATE)
278 pcie_clear_hotplug_events(ctrl);
279
280 return 0;
281}
282
283static int pciehp_resume(struct pcie_device *dev)
284{
285 struct controller *ctrl = get_service_data(dev);
286
287 if (pme_is_native(dev))
288 pcie_enable_interrupt(ctrl);
289
290 pciehp_check_presence(ctrl);
291
292 return 0;
293}
294
295static int pciehp_runtime_resume(struct pcie_device *dev)
296{
297 struct controller *ctrl = get_service_data(dev);
298
299 /* pci_restore_state() just wrote to the Slot Control register */
300 ctrl->cmd_started = jiffies;
301 ctrl->cmd_busy = true;
302
303 /* clear spurious events from rediscovery of inserted card */
304 if ((ctrl->state == ON_STATE || ctrl->state == BLINKINGOFF_STATE) &&
305 pme_is_native(dev))
306 pcie_clear_hotplug_events(ctrl);
307
308 return pciehp_resume(dev);
309}
310#endif /* PM */
311
312static struct pcie_port_service_driver hpdriver_portdrv = {
313 .name = "pciehp",
314 .port_type = PCIE_ANY_PORT,
315 .service = PCIE_PORT_SERVICE_HP,
316
317 .probe = pciehp_probe,
318 .remove = pciehp_remove,
319
320#ifdef CONFIG_PM
321 .suspend = pciehp_suspend,
322 .resume_noirq = pciehp_resume_noirq,
323 .resume = pciehp_resume,
324 .runtime_suspend = pciehp_suspend,
325 .runtime_resume = pciehp_runtime_resume,
326#endif /* PM */
327};
328
329int __init pcie_hp_init(void)
330{
331 int retval = 0;
332
333 retval = pcie_port_service_register(&hpdriver_portdrv);
334 pr_debug("pcie_port_service_register = %d\n", retval);
335 if (retval)
336 pr_debug("Failure to register service\n");
337
338 return retval;
339}