Date: Wed, 07 Jun 2006 19:52:47 +0300 From: Andriy Gapon <avg@icyb.net.ua> To: freebsd-hackers@freebsd.org Subject: working with PCI config registers (extensively) Message-ID: <4487045F.4000301@icyb.net.ua>
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I am writing a driver for some PCI hardware that does not have any IO ports or IO memory (and thus does not have any useful BARs), but rather it is controlled and communicated with by writes and reads of certain vendor-specific PCI configuration registers. I see that I can use pci_read_config() and pci_write_config() to do this, but I am not sure if there are any caveats that I should be aware of, any precautions that I should take and any conventions/rules that I should follow. To explain my question - I am concerned about PCI configuration space resources ownership, concurrency, etc. Basically things that should not matter in practice :-) -- Andriy Gaponhelp
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