Date: Thu, 4 Apr 2002 11:02:25 -0800 (PST) From: Matthew Jacob <mjacob@feral.com> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: freebsd-current@freebsd.org Subject: Re: BUS_SPACE_MAXSIZE & isp driver. Message-ID: <Pine.BSF.4.21.0204041058010.78599-100000@beppo> In-Reply-To: <15532.39941.670795.769478@grasshopper.cs.duke.edu>
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Actually, I suppose if you change: #define ISP_NSEG ((MAXPHYS/PAGE_SIZE) + 1) to #define ISP_NSEG ((BUS_SPACE_MAXSIZE/PAGE_SIZE) + 1) this will probably be more correct. I think this is probably what I should be using anyway. BTW- this was more of a 'hackers' or 'scsi' issue. I *used* to, btw, put a massively large number for segments- basically the max *should* be the number of segments I can stick in a single Request Queue (2 or 3) command plus all the continuation entries possible (5 or 7 per continuation entries, for FreeBSD ~250 or so- MMV depending on current state)- that'd be on the order of ~1800 segments. After getting burned by some surprises in the sparc64 implementation, I decided to restrict it to paramaters that were compile time invariants for each platform. I guess I picked the wrong parameter :-). -matt On Thu, 4 Apr 2002, Andrew Gallatin wrote: > > I just booted a recent current (or rather attempted to) and saw this > when attempting to mount root from a qlogic card on my miata: > > > bus_dmamap_load: Too many segs! buf_len = 0x2000 > spec_getpages:(da0a) I/O read failure: (error=22) bp > 0xfffffe0004087ae8 vp 0xfffffe000ae90000 > size: 98304, resid: 98304, a_count: 98304, valid: 0x0 > nread: 0, reqpage: 7, pindex: 59, pcount: 12 > vm_fault: pager read error, pid 1 (init) > > <... more of same ...> > > The only way I could get the system to boot was to increase > BUS_SPACE_MAXSIZE to 128K to match MAXPHYS. I don't know why they > don't match in the first place (they don't match on x86 either, so the > driver will probably puke there too.) > > #define BUS_SPACE_MAXSIZE (128 * 1024) > > Does anybody know why BUS_SPACE_MAXSIZE != MAXPHYS on some platforms? > > Thanks, > > Drew > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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