Date: Thu, 04 Apr 2002 20:20:56 -0700 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: mjacob@feral.com Cc: Terry Lambert <tlambert2@mindspring.com>, Andrew Gallatin <gallatin@cs.duke.edu>, freebsd-current@freebsd.org Subject: Re: BUS_SPACE_MAXSIZE & isp driver. Message-ID: <200204050321.g353Ku971739@aslan.scsiguy.com> In-Reply-To: Your message of "Thu, 04 Apr 2002 17:17:51 PST." <Pine.BSF.4.21.0204041715070.78599-100000@beppo>
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>BUS_SPACE_MAXSIZE seems to be related to the 'largest xfer you will be allowed >to do at one time'- which is wrong because MAXPHYS is larger. If you look at the x86 implementation, BUS_SPACE_MAXSIZE is only used in the non-GNUC case and is not referenced (I don't think) by any driver code. Even setting it to MAXPHYS is not truely correct since at some point we will have to start supporting transfer mappings that are larger than what can be mapped by a single buffer. I never realized that there was such controversy over this value... it was just put in so that I could have something for the non-GNUC case. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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