Messages in this thread | | | Date | Wed, 3 Nov 1999 00:20:22 +0100 | From | Martin Mares <> | Subject | Re: Specifying properly the PCI driver model on all linux archite ctur es, (ioremap(), bus_to_virt() ...) |
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Hello!
> It also totally destroys Alan Cox's and other peoples statements in the past > about Linux being faster than something like UDI because it doesn't have to > go through a routine just to access the bus.
Please note that these `routines' are actually simple macros or inline functions on most architectures, hence your argument doesn't apply.
> Documentation/pci.txt does state that the old pcibios functions are > depreciated. It also includes warning about having to use the values from > struct pci_dev for ioremap(), although the description could be improved. > > In rereading it, I see that the IO-mapping.txt file does mention that you > need to use the readl/w/b and writel/w/b functions. This statement really > needs to be added to section 4 of the pci.txt file, since most of the > documentation is talking about things needed for PCI DMA masters.
I've added a reference to IO-mapping.txt to pci.txt.
> I'm really getting to dislike Linux because of this kind of stuff.
Well, probably a better attitude towards Linux is to contribute some documentation yourself :)
> It is no surprise to me that many of the drivers don't do things correctly, > considering how tough it is to determine what correct is.
Please send me names of all such drivers, I'll fix them :)
Have a nice fortnight -- Martin `MJ' Mares <mj@ucw.cz> http://atrey.karlin.mff.cuni.cz/~mj/ Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth "ADA -- A Dumb Acronym"
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