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XHCI: Implement support for MSI-X.

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Works in QEMU, at least.
This commit is contained in:
Augustin Cavalier
2023-05-24 15:42:59 -04:00
parent 5dcae7c6b8
commit 769b4ee4aa
1 changed files with 9 additions and 1 deletions
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src/add-ons/kernel/busses/usb/xhci.cpp
+9 -1
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@@ -501,7 +501,15 @@ XHCI::XHCI(pci_info *info, pci_device_module_info* pci, pci_device* device, Sta
// Find the right interrupt vector, using MSIs if available.
fIRQ = fPCIInfo->u.h0.interrupt_line;
if (fPci->get_msi_count(fDevice) >= 1) {
if (fPci->get_msix_count(fDevice) >= 1) {
uint8 msiVector = 0;
if (fPci->configure_msix(fDevice, 1, &msiVector) == B_OK
&& fPci->enable_msix(fDevice) == B_OK) {
TRACE_ALWAYS("using MSI-X\n");
fIRQ = msiVector;
fUseMSI = true;
}
} else if (fPci->get_msi_count(fDevice) >= 1) {
uint8 msiVector = 0;
if (fPci->configure_msi(fDevice, 1, &msiVector) == B_OK
&& fPci->enable_msi(fDevice) == B_OK) {