Date: Thu, 08 Nov 2007 13:41:06 +0300 From: Alexander Sabourenkov <screwdriver@lxnt.info> To: =?UTF-8?B?U8O4cmVuIFNjaG1pZHQ=?= <sos@deepcore.dk> Cc: Nathan Butcher <n-butcher@fusiongol.com>, freebsd-current@freebsd.org Subject: Re: Remaining SATA (and other) issues Message-ID: <4732E7C2.3030403@lxnt.info> In-Reply-To: <4732E37F.9020707@deepcore.dk> References: <47326FB8.50602@fusiongol.com> <4732CEE3.3070003@lxnt.info> <4732DA32.3090601@deepcore.dk> <4732E18A.6040802@lxnt.info> <4732E37F.9020707@deepcore.dk>
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Søren Schmidt wrote: > As I said ATA (as in my driver) uses this promise general purpose > register to store interrupts into, it is very much needed. > The reason is that on some promise chips the interrupts are reset on > read, so I can only read the status *once* but I need it several times. If I understand correctly you use it as a controller-local variable. > Oh yes it does look for the "stat_reg" in ata_promise_mio_status() which > does the interrupt status getting etc... It seems like I now need to understand how does ata_promise_mio_status() gets called on each interrupt. I'll leave this until I have time to read the code and test your patch too. > Good question, their docs says nothing about it actually, I suppose this > is more a programming style question than anything else, anyhow it will > only change evt behavior until the first interrupt, then I'll write the > entire reg anyways :) Well, so be it. -- ./lxnt
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