site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Dkim-signature: a=rsa-sha256; t=1563560850; x=1564165650; s=mail; d=lynxstudio.com; c=relaxed/relaxed; v=1; bh=eQtL1gl8zly7GY98rmBACL6HgqtYE3puZxG9mD61XSI=; h=From:Subject:Date:Message-ID:To:MIME-Version:Content-Type; b=O23/NSwPfEh/NOvqm8ZOOiweNVc35ujyofOMKK35I4cQJtjYGjD6h++9RKorwP1Xd2jB2ifXDm7YEETJ1W2l0FQTQ67s95fJ3dZITmoBFV5iFU+MVMSOx//iN/4OJlgzCSib5vW5FdDNgg8X8SDAmGHbYU4Bpef1FUOStx7it70= Organization: Lynx Studio Technology, Inc. Thread-index: AdU+XzmujePD4sboRZ27ApAMlSRhyw== Hello, I am trying to implement PCIe pause on our kExt and cannot figure out how to test if it is working properly. I have added IOPCIPauseCompatible to our info.plist and System Info shows "Pause Compatible: Yes" for our kExt. Following the example from IOService.cpp, I have added: static const IOPMPowerState powerStatesV2[kNumberOfPowerStates] = { // verison, capabilityFlags, outputPowerCharacter, inputPowerRequirement { kIOPMPowerStateVersion2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { kIOPMPowerStateVersion2, 0, kIOPMSoftSleep, kIOPMSoftSleep, 0, 1, 0, 0, 0, 0, 0, 0 }, { kIOPMPowerStateVersion2, kIOPMPowerOn, kIOPMPowerOn, kIOPMPowerOn, 0, 3, 0, 0, 0, 0, 0, 0 }, { kIOPMPowerStateVersion2, kIOPMConfigRetained, kIOPMConfigRetained, kIOPMConfigRetained, 0, 2, 0, 0, 0, 0, 0, 0 } }; static const IOPMPowerState powerStatesV1[kNumberOfPowerStates-1] = { // verison, capabilityFlags, outputPowerCharacter, inputPowerRequirement { kIOPMPowerStateVersion1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { kIOPMPowerStateVersion1, 0, kIOPMSoftSleep, kIOPMSoftSleep, 0, 1, 0, 0, 0, 0, 0, 0 }, { kIOPMPowerStateVersion1, kIOPMPowerOn, kIOPMPowerOn, kIOPMPowerOn, 0, 3, 0, 0, 0, 0, 0, 0 }, }; PMinit(); if (kIOReturnSuccess != registerPowerDriver( this, (IOPMPowerState *)powerStatesV2, kIOPCIDevicePowerStateCount )) { IOLog( "registerPowerDriver V2 failed!\n" ); if( kIOReturnSuccess != registerPowerDriver( this, (IOPMPowerState *)powerStatesV1, kIOPCIDevicePowerStateCount-1 ) ) { IOLog( "registerPowerDriver V1 failed!\n" ); } } pIOServiceProvider->joinPMtree( this ); and here is the code just to see if it is working: ///////////////////////////////////////////////////////////////// IOReturn LynxAudioDevice::setPowerState( unsigned long whichState, IOService * whatDevice ) ///////////////////////////////////////////////////////////////// { IOLog("setPowerState( %lu )\n", whichState ); return IOAudioDevice::setPowerState( whichState, whatDevice ); // also tried returning IOPMAckImplied with no difference } I have added the pci flags to the boot-args with: sudo nvram boot-args="pci=0x200" which should mean every PCIe device that is added/removed will generate a new setPowerState call to put the device into pause mode. When I load the driver is see: setPowerState( 2 ) setPowerState( 1 ) which doesn't seem to correspond to the powerStatesV2 table passed into registerPowerDriver. I never see another setPowerState call no matter what PCIe devices are added or removed. Does anyone have any experience with PCIe pause? What am I missing to get this working so I can actually test this? Thank you, David A. Hoatson _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.... This email sent to site_archiver@lists.apple.com