Hi! > As many of you will be aware, we've been working on infrastructure for > user-mode PCI and other drivers. The first step is to be able to > handle interrupts from user space. Subsequent patches add > infrastructure for setting up DMA for PCI devices. > > The user-level interrupt code doesn't depend on the other patches, and > is probably the most mature of this patchset.
Okay, I like it; it means way easier PCI driver development. But... how do you handle shared PCI interrupts? > This patch adds a new file to /proc/irq/<nnn>/ called irq. Suitably > privileged processes can open this file. Reading the file returns the > number of interrupts (if any) that have occurred since the last read. > If the file is opened in blocking mode, reading it blocks until > an interrupt occurs. poll(2) and select(2) work as one would expect, to > allow interrupts to be one of many events to wait for. > (If you didn't like the file, one could have a special system call to > return the file descriptor). This should go into Documentation/ somewhere. Pavel -- People were complaining that M$ turns users into beta-testers... ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl! - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/