blob: 996344f6c32d9514e71e8663c3a22d2bdf170df8 [file] [log] [blame]
Tomas Winkler2703d4b2013-02-06 14:06:39 +02001/*
2 *
3 * Intel Management Engine Interface (Intel MEI) Linux driver
4 * Copyright (c) 2003-2012, Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 */
Tomas Winkler2703d4b2013-02-06 14:06:39 +020016#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <linux/kernel.h>
19#include <linux/device.h>
20#include <linux/fs.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/fcntl.h>
Tomas Winkler2703d4b2013-02-06 14:06:39 +020024#include <linux/pci.h>
25#include <linux/poll.h>
Tomas Winkler2703d4b2013-02-06 14:06:39 +020026#include <linux/ioctl.h>
27#include <linux/cdev.h>
28#include <linux/sched.h>
29#include <linux/uuid.h>
30#include <linux/compat.h>
31#include <linux/jiffies.h>
32#include <linux/interrupt.h>
Tomas Winkler2703d4b2013-02-06 14:06:39 +020033
Tomeu Vizoso989561d2016-01-07 16:46:13 +010034#include <linux/pm_domain.h>
Tomas Winkler180ea052014-03-18 22:52:02 +020035#include <linux/pm_runtime.h>
36
Tomas Winkler2703d4b2013-02-06 14:06:39 +020037#include <linux/mei.h>
38
39#include "mei_dev.h"
Tomas Winkler2703d4b2013-02-06 14:06:39 +020040#include "client.h"
Tomas Winkler6e4cd272014-03-11 14:49:23 +020041#include "hw-me-regs.h"
42#include "hw-me.h"
Tomas Winkler2703d4b2013-02-06 14:06:39 +020043
Tomas Winkler2703d4b2013-02-06 14:06:39 +020044/* mei_pci_tbl - PCI Device ID Table */
Tomas Winklera05f8f82014-03-16 14:35:58 +020045static const struct pci_device_id mei_me_pci_tbl[] = {
Alexander Usyskin8d929d42014-05-13 01:30:53 +030046 {MEI_PCI_DEVICE(MEI_DEV_ID_82946GZ, mei_me_legacy_cfg)},
47 {MEI_PCI_DEVICE(MEI_DEV_ID_82G35, mei_me_legacy_cfg)},
48 {MEI_PCI_DEVICE(MEI_DEV_ID_82Q965, mei_me_legacy_cfg)},
49 {MEI_PCI_DEVICE(MEI_DEV_ID_82G965, mei_me_legacy_cfg)},
50 {MEI_PCI_DEVICE(MEI_DEV_ID_82GM965, mei_me_legacy_cfg)},
51 {MEI_PCI_DEVICE(MEI_DEV_ID_82GME965, mei_me_legacy_cfg)},
52 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q35, mei_me_legacy_cfg)},
53 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82G33, mei_me_legacy_cfg)},
54 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82Q33, mei_me_legacy_cfg)},
55 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_82X38, mei_me_legacy_cfg)},
56 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_3200, mei_me_legacy_cfg)},
57
58 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_6, mei_me_legacy_cfg)},
59 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_7, mei_me_legacy_cfg)},
60 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_8, mei_me_legacy_cfg)},
61 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_9, mei_me_legacy_cfg)},
62 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9_10, mei_me_legacy_cfg)},
63 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_1, mei_me_legacy_cfg)},
64 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_2, mei_me_legacy_cfg)},
65 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_3, mei_me_legacy_cfg)},
66 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH9M_4, mei_me_legacy_cfg)},
67 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_1, mei_me_ich_cfg)},
68 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_2, mei_me_ich_cfg)},
69 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_3, mei_me_ich_cfg)},
70 {MEI_PCI_DEVICE(MEI_DEV_ID_ICH10_4, mei_me_ich_cfg)},
71
72 {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_1, mei_me_pch_cfg)},
73 {MEI_PCI_DEVICE(MEI_DEV_ID_IBXPK_2, mei_me_pch_cfg)},
Tomas Winklerc9199512014-05-13 01:30:54 +030074 {MEI_PCI_DEVICE(MEI_DEV_ID_CPT_1, mei_me_pch_cpt_pbg_cfg)},
75 {MEI_PCI_DEVICE(MEI_DEV_ID_PBG_1, mei_me_pch_cpt_pbg_cfg)},
Alexander Usyskin8d929d42014-05-13 01:30:53 +030076 {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_1, mei_me_pch_cfg)},
77 {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_2, mei_me_pch_cfg)},
78 {MEI_PCI_DEVICE(MEI_DEV_ID_PPT_3, mei_me_pch_cfg)},
Alexander Usyskinedca5ea2014-11-19 17:01:38 +020079 {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_H, mei_me_pch8_sps_cfg)},
80 {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_W, mei_me_pch8_sps_cfg)},
81 {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_LP, mei_me_pch8_cfg)},
82 {MEI_PCI_DEVICE(MEI_DEV_ID_LPT_HR, mei_me_pch8_sps_cfg)},
83 {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, mei_me_pch8_cfg)},
84 {MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, mei_me_pch8_cfg)},
Tomas Winkler2703d4b2013-02-06 14:06:39 +020085
Tomas Winkler1625c7e2015-08-02 22:20:57 +030086 {MEI_PCI_DEVICE(MEI_DEV_ID_SPT, mei_me_pch8_cfg)},
87 {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, mei_me_pch8_cfg)},
88 {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, mei_me_pch8_cfg)},
89 {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, mei_me_pch8_cfg)},
90
Tomas Winkler2703d4b2013-02-06 14:06:39 +020091 /* required last entry */
92 {0, }
93};
94
Tomas Winklerb68301e2013-03-27 16:58:29 +020095MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl);
Tomas Winkler2703d4b2013-02-06 14:06:39 +020096
Rafael J. Wysockibbd6d052014-12-04 22:43:07 +010097#ifdef CONFIG_PM
Tomas Winklere13fa902014-03-18 22:52:05 +020098static inline void mei_me_set_pm_domain(struct mei_device *dev);
99static inline void mei_me_unset_pm_domain(struct mei_device *dev);
100#else
101static inline void mei_me_set_pm_domain(struct mei_device *dev) {}
102static inline void mei_me_unset_pm_domain(struct mei_device *dev) {}
Rafael J. Wysockibbd6d052014-12-04 22:43:07 +0100103#endif /* CONFIG_PM */
Tomas Winklere13fa902014-03-18 22:52:05 +0200104
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200105/**
Alexander Usyskince231392014-09-29 16:31:50 +0300106 * mei_me_quirk_probe - probe for devices that doesn't valid ME interface
Masanari Iida393b1482013-04-05 01:05:05 +0900107 *
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200108 * @pdev: PCI device structure
Tomas Winklerc9199512014-05-13 01:30:54 +0300109 * @cfg: per generation config
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200110 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300111 * Return: true if ME Interface is valid, false otherwise
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200112 */
Tomas Winklerb68301e2013-03-27 16:58:29 +0200113static bool mei_me_quirk_probe(struct pci_dev *pdev,
Tomas Winklerc9199512014-05-13 01:30:54 +0300114 const struct mei_cfg *cfg)
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200115{
Tomas Winklerc9199512014-05-13 01:30:54 +0300116 if (cfg->quirk_probe && cfg->quirk_probe(pdev)) {
117 dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");
118 return false;
Tomas Winkler5e6533a2014-03-25 21:25:18 +0200119 }
120
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200121 return true;
122}
Tomas Winklerc9199512014-05-13 01:30:54 +0300123
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200124/**
Alexander Usyskince231392014-09-29 16:31:50 +0300125 * mei_me_probe - Device Initialization Routine
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200126 *
127 * @pdev: PCI device structure
128 * @ent: entry in kcs_pci_tbl
129 *
Alexander Usyskina8605ea2014-09-29 16:31:49 +0300130 * Return: 0 on success, <0 on failure.
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200131 */
Tomas Winklerb68301e2013-03-27 16:58:29 +0200132static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200133{
Alexander Usyskin8d929d42014-05-13 01:30:53 +0300134 const struct mei_cfg *cfg = (struct mei_cfg *)(ent->driver_data);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200135 struct mei_device *dev;
Tomas Winkler52c34562013-02-06 14:06:40 +0200136 struct mei_me_hw *hw;
Alexander Usyskin1fa55b42015-08-02 22:20:52 +0300137 unsigned int irqflags;
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200138 int err;
139
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200140
Tomas Winklerc9199512014-05-13 01:30:54 +0300141 if (!mei_me_quirk_probe(pdev, cfg))
142 return -ENODEV;
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200143
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200144 /* enable pci dev */
145 err = pci_enable_device(pdev);
146 if (err) {
147 dev_err(&pdev->dev, "failed to enable pci device.\n");
148 goto end;
149 }
150 /* set PCI host mastering */
151 pci_set_master(pdev);
152 /* pci request regions for mei driver */
153 err = pci_request_regions(pdev, KBUILD_MODNAME);
154 if (err) {
155 dev_err(&pdev->dev, "failed to get pci regions.\n");
156 goto disable_device;
157 }
Tomas Winkler3ecfb162013-12-17 15:56:57 +0200158
159 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) ||
160 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
161
162 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
163 if (err)
164 err = dma_set_coherent_mask(&pdev->dev,
165 DMA_BIT_MASK(32));
166 }
167 if (err) {
168 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
169 goto release_regions;
170 }
171
172
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200173 /* allocates and initializes the mei dev structure */
Alexander Usyskin8d929d42014-05-13 01:30:53 +0300174 dev = mei_me_dev_init(pdev, cfg);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200175 if (!dev) {
176 err = -ENOMEM;
177 goto release_regions;
178 }
Tomas Winkler52c34562013-02-06 14:06:40 +0200179 hw = to_me_hw(dev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200180 /* mapping IO device memory */
Tomas Winkler52c34562013-02-06 14:06:40 +0200181 hw->mem_addr = pci_iomap(pdev, 0, 0);
182 if (!hw->mem_addr) {
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200183 dev_err(&pdev->dev, "mapping I/O device memory failure.\n");
184 err = -ENOMEM;
185 goto free_device;
186 }
187 pci_enable_msi(pdev);
188
189 /* request and enable interrupt */
Alexander Usyskin1fa55b42015-08-02 22:20:52 +0300190 irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
191
192 err = request_threaded_irq(pdev->irq,
Tomas Winkler06ecd642013-02-06 14:06:42 +0200193 mei_me_irq_quick_handler,
194 mei_me_irq_thread_handler,
Alexander Usyskin1fa55b42015-08-02 22:20:52 +0300195 irqflags, KBUILD_MODNAME, dev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200196 if (err) {
197 dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
198 pdev->irq);
199 goto disable_msi;
200 }
201
Tomas Winklerc4d589b2013-03-27 16:58:28 +0200202 if (mei_start(dev)) {
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200203 dev_err(&pdev->dev, "init hw failure.\n");
204 err = -ENODEV;
205 goto release_irq;
206 }
207
Tomas Winkler180ea052014-03-18 22:52:02 +0200208 pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT);
209 pm_runtime_use_autosuspend(&pdev->dev);
210
Alexander Usyskinf3d8e872014-06-23 15:10:35 +0300211 err = mei_register(dev, &pdev->dev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200212 if (err)
Alexander Usyskin1f7e4892016-02-07 23:35:20 +0200213 goto stop;
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200214
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200215 pci_set_drvdata(pdev, dev);
216
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200217 schedule_delayed_work(&dev->timer_work, HZ);
218
Tomas Winklere13fa902014-03-18 22:52:05 +0200219 /*
220 * For not wake-able HW runtime pm framework
221 * can't be used on pci device level.
222 * Use domain runtime pm callbacks instead.
223 */
224 if (!pci_dev_run_wake(pdev))
225 mei_me_set_pm_domain(dev);
226
Tomas Winkler180ea052014-03-18 22:52:02 +0200227 if (mei_pg_is_enabled(dev))
228 pm_runtime_put_noidle(&pdev->dev);
229
Alexander Usyskinc4e87b52013-10-21 22:05:42 +0300230 dev_dbg(&pdev->dev, "initialization successful.\n");
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200231
232 return 0;
233
Alexander Usyskin1f7e4892016-02-07 23:35:20 +0200234stop:
235 mei_stop(dev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200236release_irq:
Tomas Winklerdc844b02013-11-11 13:26:06 +0200237 mei_cancel_work(dev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200238 mei_disable_interrupts(dev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200239 free_irq(pdev->irq, dev);
240disable_msi:
241 pci_disable_msi(pdev);
Tomas Winkler52c34562013-02-06 14:06:40 +0200242 pci_iounmap(pdev, hw->mem_addr);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200243free_device:
244 kfree(dev);
245release_regions:
246 pci_release_regions(pdev);
247disable_device:
248 pci_disable_device(pdev);
249end:
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200250 dev_err(&pdev->dev, "initialization failed.\n");
251 return err;
252}
253
254/**
Alexander Usyskince231392014-09-29 16:31:50 +0300255 * mei_me_remove - Device Removal Routine
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200256 *
257 * @pdev: PCI device structure
258 *
259 * mei_remove is called by the PCI subsystem to alert the driver
260 * that it should release a PCI device.
261 */
Tomas Winklerb68301e2013-03-27 16:58:29 +0200262static void mei_me_remove(struct pci_dev *pdev)
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200263{
264 struct mei_device *dev;
Tomas Winkler52c34562013-02-06 14:06:40 +0200265 struct mei_me_hw *hw;
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200266
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200267 dev = pci_get_drvdata(pdev);
268 if (!dev)
269 return;
270
Tomas Winkler180ea052014-03-18 22:52:02 +0200271 if (mei_pg_is_enabled(dev))
272 pm_runtime_get_noresume(&pdev->dev);
273
Tomas Winkler52c34562013-02-06 14:06:40 +0200274 hw = to_me_hw(dev);
275
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200276
Paul Bolleed6f7ac2013-10-17 13:52:10 +0300277 dev_dbg(&pdev->dev, "stop\n");
Tomas Winkler7cb035d2013-03-10 13:56:08 +0200278 mei_stop(dev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200279
Tomas Winklere13fa902014-03-18 22:52:05 +0200280 if (!pci_dev_run_wake(pdev))
281 mei_me_unset_pm_domain(dev);
282
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200283 /* disable interrupts */
284 mei_disable_interrupts(dev);
285
286 free_irq(pdev->irq, dev);
287 pci_disable_msi(pdev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200288
Tomas Winkler52c34562013-02-06 14:06:40 +0200289 if (hw->mem_addr)
290 pci_iounmap(pdev, hw->mem_addr);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200291
Tomas Winkler30e53bb2013-04-05 22:10:34 +0300292 mei_deregister(dev);
293
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200294 kfree(dev);
295
296 pci_release_regions(pdev);
297 pci_disable_device(pdev);
298
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200299
300}
Alexander Usyskin16833252014-02-18 14:31:08 +0200301#ifdef CONFIG_PM_SLEEP
Tomas Winklerb68301e2013-03-27 16:58:29 +0200302static int mei_me_pci_suspend(struct device *device)
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200303{
304 struct pci_dev *pdev = to_pci_dev(device);
305 struct mei_device *dev = pci_get_drvdata(pdev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200306
307 if (!dev)
308 return -ENODEV;
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200309
Paul Bolleed6f7ac2013-10-17 13:52:10 +0300310 dev_dbg(&pdev->dev, "suspend\n");
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200311
Tomas Winkler7cb035d2013-03-10 13:56:08 +0200312 mei_stop(dev);
313
314 mei_disable_interrupts(dev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200315
316 free_irq(pdev->irq, dev);
317 pci_disable_msi(pdev);
318
Tomas Winkler7cb035d2013-03-10 13:56:08 +0200319 return 0;
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200320}
321
Tomas Winklerb68301e2013-03-27 16:58:29 +0200322static int mei_me_pci_resume(struct device *device)
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200323{
324 struct pci_dev *pdev = to_pci_dev(device);
325 struct mei_device *dev;
Alexander Usyskin1fa55b42015-08-02 22:20:52 +0300326 unsigned int irqflags;
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200327 int err;
328
329 dev = pci_get_drvdata(pdev);
330 if (!dev)
331 return -ENODEV;
332
333 pci_enable_msi(pdev);
334
Alexander Usyskin1fa55b42015-08-02 22:20:52 +0300335 irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
336
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200337 /* request and enable interrupt */
Alexander Usyskin1fa55b42015-08-02 22:20:52 +0300338 err = request_threaded_irq(pdev->irq,
Tomas Winkler06ecd642013-02-06 14:06:42 +0200339 mei_me_irq_quick_handler,
340 mei_me_irq_thread_handler,
Alexander Usyskin1fa55b42015-08-02 22:20:52 +0300341 irqflags, KBUILD_MODNAME, dev);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200342
343 if (err) {
344 dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",
345 pdev->irq);
346 return err;
347 }
348
Tomas Winkler33ec0822014-01-12 00:36:09 +0200349 err = mei_restart(dev);
350 if (err)
351 return err;
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200352
353 /* Start timer if stopped in suspend */
354 schedule_delayed_work(&dev->timer_work, HZ);
355
Tomas Winkler33ec0822014-01-12 00:36:09 +0200356 return 0;
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200357}
Tomas Winkler180ea052014-03-18 22:52:02 +0200358#endif /* CONFIG_PM_SLEEP */
Alexander Usyskin16833252014-02-18 14:31:08 +0200359
Rafael J. Wysockibbd6d052014-12-04 22:43:07 +0100360#ifdef CONFIG_PM
Tomas Winkler180ea052014-03-18 22:52:02 +0200361static int mei_me_pm_runtime_idle(struct device *device)
362{
363 struct pci_dev *pdev = to_pci_dev(device);
364 struct mei_device *dev;
365
366 dev_dbg(&pdev->dev, "rpm: me: runtime_idle\n");
367
368 dev = pci_get_drvdata(pdev);
369 if (!dev)
370 return -ENODEV;
371 if (mei_write_is_idle(dev))
Alexander Usyskind5d83f82014-07-17 10:53:36 +0300372 pm_runtime_autosuspend(device);
Tomas Winkler180ea052014-03-18 22:52:02 +0200373
374 return -EBUSY;
375}
376
377static int mei_me_pm_runtime_suspend(struct device *device)
378{
379 struct pci_dev *pdev = to_pci_dev(device);
380 struct mei_device *dev;
381 int ret;
382
383 dev_dbg(&pdev->dev, "rpm: me: runtime suspend\n");
384
385 dev = pci_get_drvdata(pdev);
386 if (!dev)
387 return -ENODEV;
388
389 mutex_lock(&dev->device_lock);
390
391 if (mei_write_is_idle(dev))
Alexander Usyskin2d1995f2015-02-10 10:39:34 +0200392 ret = mei_me_pg_enter_sync(dev);
Tomas Winkler180ea052014-03-18 22:52:02 +0200393 else
394 ret = -EAGAIN;
395
396 mutex_unlock(&dev->device_lock);
397
398 dev_dbg(&pdev->dev, "rpm: me: runtime suspend ret=%d\n", ret);
399
400 return ret;
401}
402
403static int mei_me_pm_runtime_resume(struct device *device)
404{
405 struct pci_dev *pdev = to_pci_dev(device);
406 struct mei_device *dev;
407 int ret;
408
409 dev_dbg(&pdev->dev, "rpm: me: runtime resume\n");
410
411 dev = pci_get_drvdata(pdev);
412 if (!dev)
413 return -ENODEV;
414
415 mutex_lock(&dev->device_lock);
416
Alexander Usyskin2d1995f2015-02-10 10:39:34 +0200417 ret = mei_me_pg_exit_sync(dev);
Tomas Winkler180ea052014-03-18 22:52:02 +0200418
419 mutex_unlock(&dev->device_lock);
420
421 dev_dbg(&pdev->dev, "rpm: me: runtime resume ret = %d\n", ret);
422
423 return ret;
424}
Tomas Winklere13fa902014-03-18 22:52:05 +0200425
426/**
Geert Uytterhoeven7efceb52014-09-16 22:00:47 +0200427 * mei_me_set_pm_domain - fill and set pm domain structure for device
Tomas Winklere13fa902014-03-18 22:52:05 +0200428 *
429 * @dev: mei_device
430 */
431static inline void mei_me_set_pm_domain(struct mei_device *dev)
432{
Tomas Winklerd08b8fc2014-09-29 16:31:44 +0300433 struct pci_dev *pdev = to_pci_dev(dev->dev);
Tomas Winklere13fa902014-03-18 22:52:05 +0200434
435 if (pdev->dev.bus && pdev->dev.bus->pm) {
436 dev->pg_domain.ops = *pdev->dev.bus->pm;
437
438 dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend;
439 dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume;
440 dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle;
441
Tomeu Vizoso989561d2016-01-07 16:46:13 +0100442 dev_pm_domain_set(&pdev->dev, &dev->pg_domain);
Tomas Winklere13fa902014-03-18 22:52:05 +0200443 }
444}
445
446/**
Geert Uytterhoeven7efceb52014-09-16 22:00:47 +0200447 * mei_me_unset_pm_domain - clean pm domain structure for device
Tomas Winklere13fa902014-03-18 22:52:05 +0200448 *
449 * @dev: mei_device
450 */
451static inline void mei_me_unset_pm_domain(struct mei_device *dev)
452{
453 /* stop using pm callbacks if any */
Tomeu Vizoso989561d2016-01-07 16:46:13 +0100454 dev_pm_domain_set(dev->dev, NULL);
Tomas Winklere13fa902014-03-18 22:52:05 +0200455}
Tomas Winkler180ea052014-03-18 22:52:02 +0200456
Tomas Winkler180ea052014-03-18 22:52:02 +0200457static const struct dev_pm_ops mei_me_pm_ops = {
458 SET_SYSTEM_SLEEP_PM_OPS(mei_me_pci_suspend,
459 mei_me_pci_resume)
460 SET_RUNTIME_PM_OPS(
461 mei_me_pm_runtime_suspend,
462 mei_me_pm_runtime_resume,
463 mei_me_pm_runtime_idle)
464};
465
Tomas Winklerb68301e2013-03-27 16:58:29 +0200466#define MEI_ME_PM_OPS (&mei_me_pm_ops)
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200467#else
Tomas Winklerb68301e2013-03-27 16:58:29 +0200468#define MEI_ME_PM_OPS NULL
Tomas Winkler180ea052014-03-18 22:52:02 +0200469#endif /* CONFIG_PM */
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200470/*
471 * PCI driver structure
472 */
Tomas Winklerb68301e2013-03-27 16:58:29 +0200473static struct pci_driver mei_me_driver = {
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200474 .name = KBUILD_MODNAME,
Tomas Winklerb68301e2013-03-27 16:58:29 +0200475 .id_table = mei_me_pci_tbl,
476 .probe = mei_me_probe,
477 .remove = mei_me_remove,
478 .shutdown = mei_me_remove,
479 .driver.pm = MEI_ME_PM_OPS,
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200480};
481
Tomas Winklerb68301e2013-03-27 16:58:29 +0200482module_pci_driver(mei_me_driver);
Tomas Winkler2703d4b2013-02-06 14:06:39 +0200483
484MODULE_AUTHOR("Intel Corporation");
485MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
486MODULE_LICENSE("GPL v2");