20 lines
693 B
C
20 lines
693 B
C
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diff --git a/sys/dev/bhnd/bhndb/bhndb_pcivar.h b/sys/dev/bhnd/bhndb/bhndb_pcivar.h
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index ed749518..7b473fa6 100644
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--- a/sys/dev/bhnd/bhndb/bhndb_pcivar.h
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+++ b/sys/dev/bhnd/bhndb/bhndb_pcivar.h
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@@ -70,6 +70,14 @@ enum {
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* interrupt flags via the SIBA_CFG0_INTVEC register.
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*/
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BHNDB_PCI_QUIRK_SIBA_INTVEC = (1<<1),
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+
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+ /**
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+ * The PCI/PCIe bridge must not use MSI; instead, fall back to legacy
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+ * INTx line interrupts. Required on some systems (e.g. NVIDIA MCP89
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+ * based Apple MacBook Air) where MSI messages from the Broadcom
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+ * PCIe-G1 endpoint are never delivered, causing device timeouts.
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+ */
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+ BHNDB_PCI_QUIRK_NO_MSI = (1<<2),
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};
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/** bhndb_pci quirk table entry */
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