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From: Hans J. Koch on 21 Apr 2010 06:40 On Wed, Apr 21, 2010 at 12:38:49PM +0300, Michael S. Tsirkin wrote: > > > + j++; > > + } > > + } > > + for (i = 0, j = 0; i < PCI_STD_RESOURCE_END && > > + j < MAX_UIO_PORT_REGIONS; i++) { > > + if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { > > + name = kmalloc(8, GFP_KERNEL); > > + if (name == NULL) > > + break; > > + sprintf(name, "iobar%d", i); > > + info->port[j].name = name; > > + info->port[j].start = pci_resource_start(pdev, i); > > + info->port[j].size = pci_resource_len(pdev, i); > > + info->port[j].porttype = UIO_PORT_X86; > > + j++; > > At least on x86, I think io bar can not be mmapped. That's right. porttype == UIO_PORT_X86 is only there for information purposes. Userspace then knows that it cannot map this but has to use things like inb(), outb() and friends after getting access rights with ioperm()/iopl(). "start" and "size" gives userspace the information needed to do this. Thanks, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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