1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (c) 2003-2022, Intel Corporation. All rights reserved.
13 #include <linux/dma-mapping.h>
24 #include "hw-me-regs.h"
25 #include "hw-me.h"
27 /* mei_pci_tbl - PCI Device ID Table */
148 	struct pci_dev *pdev = to_pci_dev(dev->parent);  in mei_me_read_fws()
154  * mei_me_quirk_probe - probe for devices that doesn't valid ME interface
164 	if (cfg->quirk_probe && cfg->quirk_probe(pdev)) {  in mei_me_quirk_probe()
165 		dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n");  in mei_me_quirk_probe()
173  * mei_me_probe - Device Initialization Routine
188 	cfg = mei_me_get_cfg(ent->driver_data);  in mei_me_probe()
190 		return -ENODEV;  in mei_me_probe()
193 		return -ENODEV;  in mei_me_probe()
198 		dev_err(&pdev->dev, "failed to enable pci device.\n");  in mei_me_probe()
206 		dev_err(&pdev->dev, "failed to get pci regions.\n");  in mei_me_probe()
210 	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));  in mei_me_probe()
212 		dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");  in mei_me_probe()
217 	dev = mei_me_dev_init(&pdev->dev, cfg, false);  in mei_me_probe()
219 		err = -ENOMEM;  in mei_me_probe()
223 	hw->mem_addr = pcim_iomap_table(pdev)[0];  in mei_me_probe()
224 	hw->read_fws = mei_me_read_fws;  in mei_me_probe()
226 	err = mei_register(dev, &pdev->dev);  in mei_me_probe()
232 	hw->irq = pdev->irq;  in mei_me_probe()
237 	err = request_threaded_irq(pdev->irq,  in mei_me_probe()
242 		dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",  in mei_me_probe()
243 		       pdev->irq);  in mei_me_probe()
248 		dev_err(&pdev->dev, "init hw failure.\n");  in mei_me_probe()
249 		err = -ENODEV;  in mei_me_probe()
253 	pm_runtime_set_autosuspend_delay(&pdev->dev, MEI_ME_RPM_TIMEOUT);  in mei_me_probe()
254 	pm_runtime_use_autosuspend(&pdev->dev);  in mei_me_probe()
262 	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);  in mei_me_probe()
269 	 * To get around the PCI device native runtime pm,  in mei_me_probe()
270 	 * ME uses runtime pm domain handlers which take precedence  in mei_me_probe()
271 	 * over the driver's pm handlers.  in mei_me_probe()
276 		pm_runtime_put_noidle(&pdev->dev);  in mei_me_probe()
277 		if (hw->d0i3_supported)  in mei_me_probe()
278 			pm_runtime_allow(&pdev->dev);  in mei_me_probe()
281 	dev_dbg(&pdev->dev, "initialization successful.\n");  in mei_me_probe()
288 	free_irq(pdev->irq, dev);  in mei_me_probe()
291 	dev_err(&pdev->dev, "initialization failed.\n");  in mei_me_probe()
296  * mei_me_shutdown - Device Removal Routine
308 	dev_dbg(&pdev->dev, "shutdown\n");  in mei_me_shutdown()
314 	free_irq(pdev->irq, dev);  in mei_me_shutdown()
318  * mei_me_remove - Device Removal Routine
330 		pm_runtime_get_noresume(&pdev->dev);  in mei_me_remove()
332 	dev_dbg(&pdev->dev, "stop\n");  in mei_me_remove()
339 	free_irq(pdev->irq, dev);  in mei_me_remove()
356 	dev_dbg(&pdev->dev, "suspend\n");  in mei_me_pci_suspend()
362 	free_irq(pdev->irq, dev);  in mei_me_pci_suspend()
380 	err = request_threaded_irq(pdev->irq,  in mei_me_pci_resume()
386 		dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",  in mei_me_pci_resume()
387 				pdev->irq);  in mei_me_pci_resume()
393 		free_irq(pdev->irq, dev);  in mei_me_pci_resume()
398 	schedule_delayed_work(&dev->timer_work, HZ);  in mei_me_pci_resume()
424 	return -EBUSY;  in mei_me_pm_runtime_idle()
434 	mutex_lock(&dev->device_lock);  in mei_me_pm_runtime_suspend()
439 		ret = -EAGAIN;  in mei_me_pm_runtime_suspend()
441 	mutex_unlock(&dev->device_lock);  in mei_me_pm_runtime_suspend()
445 	if (ret && ret != -EAGAIN)  in mei_me_pm_runtime_suspend()
446 		schedule_work(&dev->reset_work);  in mei_me_pm_runtime_suspend()
458 	mutex_lock(&dev->device_lock);  in mei_me_pm_runtime_resume()
462 	mutex_unlock(&dev->device_lock);  in mei_me_pm_runtime_resume()
467 		schedule_work(&dev->reset_work);  in mei_me_pm_runtime_resume()
473  * mei_me_set_pm_domain - fill and set pm domain structure for device
479 	struct pci_dev *pdev  = to_pci_dev(dev->parent);  in mei_me_set_pm_domain()
481 	if (pdev->dev.bus && pdev->dev.bus->pm) {  in mei_me_set_pm_domain()
482 		dev->pg_domain.ops = *pdev->dev.bus->pm;  in mei_me_set_pm_domain()
484 		dev->pg_domain.ops.runtime_suspend = mei_me_pm_runtime_suspend;  in mei_me_set_pm_domain()
485 		dev->pg_domain.ops.runtime_resume = mei_me_pm_runtime_resume;  in mei_me_set_pm_domain()
486 		dev->pg_domain.ops.runtime_idle = mei_me_pm_runtime_idle;  in mei_me_set_pm_domain()
488 		dev_pm_domain_set(&pdev->dev, &dev->pg_domain);  in mei_me_set_pm_domain()
493  * mei_me_unset_pm_domain - clean pm domain structure for device
499 	/* stop using pm callbacks if any */  in mei_me_unset_pm_domain()
500 	dev_pm_domain_set(dev->parent, NULL);  in mei_me_unset_pm_domain()
527 	.driver.pm = MEI_ME_PM_OPS,