Roland Dreier <[EMAIL PROTECTED]> writes: > > > - In spec hardware does not require MSI to generate interrupts > > > Which leaves enabling MSI optional. > > > > Actually at least the Qlogic/Pathscale PCI Express ipath adapters > > cannot generate INTx interrupts -- they definitely do require MSI to > > operate. > > Oh yeah... when I first found out about this, I rechecked the PCI > Express spec and found that in fact legacy INTx interrupts are > optional. So the ipath adapters that require MSI do conform to the > spec.
Hmm... I find in section 6.1: > In addition to PCI INTx compatible interrupt emulation, PCI Express > requires support of MSI or MSI-X or both. Which suggests that INTx support is required. I do not find any wording that suggest the opposite. I do see it stated that it is intended to EOL support for INTx at some point. Where did you see it mentioned that INTx was optional? I do see it clearly stating that MSI is the preferred mechanism from pci express. Eric - 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/
