xhci(4): map MSI-X

[Patrick Wildt]

Hi,

I noticed that on Qemu with arm64 we're falling back to legacy
interrupts with xhci(4) on PCI.  Turns out that the virtual xHCI
does not support MSI, but it does support MSI-X.  By having xhci(4)
map MSI-X as well I can use that on Qemu.

My x395, which so far used MSI, is still working fine with this:

-xhci0 at pci6 dev 0 function 3 "AMD 17h/1xh xHCI" rev 0x00: msi, xHCI 1.10
+xhci0 at pci6 dev 0 function 3 "AMD 17h/1xh xHCI" rev 0x00: msix, xHCI 1.10
-xhci1 at pci6 dev 0 function 4 "AMD 17h/1xh xHCI" rev 0x00: msi, xHCI 1.10
+xhci1 at pci6 dev 0 function 4 "AMD 17h/1xh xHCI" rev 0x00: msix, xHCI 1.10

ok?

Patrick

diff --git a/sys/dev/pci/xhci_pci.c b/sys/dev/pci/xhci_pci.c
index 88bdf66dbd74..52d0bc1b6761 100644
--- a/sys/dev/pci/xhci_pci.c
+++ b/sys/dev/pci/xhci_pci.c
@@ -158,7 +158,8 @@ xhci_pci_attach(struct device *parent, struct device *self, 
void *aux)
        }
 
        /* Map and establish the interrupt. */
-       if (pci_intr_map_msi(pa, &ih) != 0 && pci_intr_map(pa, &ih) != 0) {
+       if (pci_intr_map_msix(pa, 0, &ih) != 0 &&
+           pci_intr_map_msi(pa, &ih) != 0 && pci_intr_map(pa, &ih) != 0) {
                printf(": couldn't map interrupt\n");
                goto unmap_ret;
        }