> On Sat, 15 Oct 2016 12:37:55 +0000 > Bharat Kumar Gogada <bharat.kumar.gogada@xxxxxxxxxx> wrote: > > Hi Bharat, > > > Can anyone tell why MSI interrupts are limited to maximum 32 > > interrupts, even though we have 16bit message data register ? > > That's the very definition of the original PCI MSI: Up to 32 consecutive interrupts > per function, and a single doorbell address. > MSI-X lifts that restriction and offers up to 2048 interrupts that do not have to > be contiguous can target individual doorbells. Assuming your MSI controller > advertises MSI-X support and that your devices do support it as well, you'll be > able to enjoy those. > Thanks Marc, so then only 5 bits of message data register will be used, so what is the purpose rest of the bits ? > > > > Regards, > > Bharat > > > > > > This email and any attachments are intended for the sole use of the > > named recipient(s) and contain(s) confidential information that may be > > proprietary, privileged or copyrighted under applicable law. If you > > are not the intended recipient, do not read, copy, or forward this > > email message or any attachments. Delete this email message and any > > attachments immediately. > > > > Please fix your email not to carry such disclaimer (or use a private email address > if you can't work around your company policy). Posting confidential information > on a public mailing list feels a bit silly. > > Thanks, > > M. > -- > Without deviation from the norm, progress is not possible. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
