June 2006 - Darwin-kernel - lists.apple.com

Re: open ("/dev/tty.xxxx"...) for my driver crashes the system
by Pavan Chebbi 28 Jun '06

28 Jun '06

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Re: Again sending my question
by Terry Lambert 27 Jun '06

27 Jun '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Here is the source code for Apple's mouse driver: -- Terry This is my question: I have looked into the IOHIDFamily and IOUSBFamily code. Regards Amy _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/tlambert%40apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… USB doesn't quite work the way you seem to think it does, and IOHIDFamily drivers don't handle interrupts directly, themselves; they end up dispatched as events to the specific class driver. <http://darwinsource.opendarwin.org/10.4.6.ppc/IOHIDFamily-172.8/IOHIDFamily… > On Jun 27, 2006, at 3:51 AM, Amy wrote: Few days back I asked this question in darwin-driver and darwin-kernel list, but no one has replied. I was thinking that may be some one else has asked this question earlier, so people find this question as mere repetition. I searched the complete list, but of no use. May I know the reason why nobody has replied to this question, as I desperately waiting some one to answer this. I tried my best to know the follow of mouse click interrupt. Just for the understanding purpose, I want to write a mouse driver, where I can receive the mouse click interrupt. What I think is, there should be some IOInterruptEventSource within these family code which is receving the events and then it should give it to mouse driver. Now if extend my mouse driver from IOUSBHIDDriver, how it will receive those mouse click events for processing. Also I couldn't understand how the IOHIDFamily and IOUSBFamily is handling the interrupts. There is one event source callback doKickEventConsumer in IOHIDSystem, but the implementation of this callback doesn't tell any thing about how the events are propragated. Also there are IOInterruptEventSource in classes IOHIKeyBoardMapper and in USB controller class.But again how the events are given to the driver is not clear. It would be great if there is any detailed documentation for these families. This email sent to tlambert(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: Enable/Disable CPU via CLI
by Ken Mankoff 27 Jun '06

27 Jun '06

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Enable/Disable CPU via CLI
by Ken Mankoff 27 Jun '06

27 Jun '06

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Re: open ("/dev/tty.xxxx"...) for my driver crashes the system
by Garth Cummings 27 Jun '06

27 Jun '06

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Re: kextunload problem
by Herb Petschauer 27 Jun '06

27 Jun '06

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Re: kextunload problem
by Mark Stow 27 Jun '06

27 Jun '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com From: "Herb Petschauer" <bogvardi(a)gmail.com> To: "Mark Stow" <markstow(a)hotmail.com> CC: Darwin-kernel(a)lists.apple.com Subject: Re: kextunload problem Date: Tue, 27 Jun 2006 07:37:40 -0700 Ok, top posting it is... :-) A simple solution, does your free() method call super::free()? That's my mistake 9 times of out 10. See also this thread: < http://lists.apple.com/archives/darwin-drivers/2006/May/msg00091.html> hth, -H. Herb, thanks. I have some more info - The system log tells me there is one instance of my class which is why it can't unload. It doesn't make any difference if the firewire device is plugged in or not. I tried overriding retain() and release(), and in both cases when kextunload fails or succeeds, release() seems to be called once more than retain(). I also noticed that if I delete the driver from system/library/extensions and reboot, so it's not loaded on boot, and then copy it back and kextload it, kextunload will succeed. If someone is over-retaining (and it seems to need to happen on bootup) wouldn't I see a difference in the retain() release() counts when unload fails? _________________________________________________________________ Windows Live Messenger has arrived. Click here to download it for free! http://imagine-msn.com/messenger/launch80/?locale=en-gb _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… thanks again - sorry - I've not posted anything before! my free() calls super::free(). In an effort to find out why it's not unloading, all the life cycle functions just call super (and IOLog for some diags). any ideas why logging out and back in again would cure this kextunload fail issue? Look at the OSObject.cpp code, I think the retain count is set to "1" in the constructor, so I would expect the release() calls to go one beyond the retain() calls. On 27/06/06, Mark Stow <markstow(a)hotmail.com> wrote: >From: "Herb Petschauer" < bogvardi(a)gmail.com> >To: "Mark Stow" <markstow(a)hotmail.com> >CC: Darwin-kernel(a)lists.apple.com >Subject: Re: kextunload problem >Date: Mon, 26 Jun 2006 09:18:45 -0700 > >On 26/06/06, Mark Stow <markstow(a)hotmail.com > wrote: >> >>Hi - I'm having some difficulties with kextunload. >>I am working on a firewire device driver which derives from IOService. >>The >>problem seems to be that free() never gets called. However, if I log out, >>then log back in again, everything works fine - ie free() is called, and >>the >>driver unloads correctly. >>I have stripped the code down to a bare minimum of just the life cycle >>functions, which in turn just call into IOService. I see init(), attach() >>and start() being called, and then on unload stop() detach() but not >>free(). >> Any help/ideas would be appreciated! >> >> >> > >Check your system.log, there's probably a message telling you why your kext >won't unload (e.g. Couldn't unload kext (name) because there are x >instances >of <some class>). free() doesn't get called until the last release() >(retain/release must balance) so I suspect someone is over-retaining(). Is >your Firewire drive unplugged when you try and unload the kext? The >/dev/disk nodes are usually left created until you unplug the device. Just >a thought... > >-H. _________________________________________________________________ The new MSN Search Toolbar now includes Desktop search! http://join.msn.com/toolbar/overview This email sent to site_archiver(a)lists.apple.com

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Re: Again sending my question
by Herb Petschauer 27 Jun '06

27 Jun '06

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Re: kextunload problem
by Herb Petschauer 27 Jun '06

27 Jun '06

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Again sending my question
by Amy 27 Jun '06

27 Jun '06

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