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Disable MSI if the linux,pcie-nomsi flag is present

This commit is contained in:
jmcneill 2021-08-10 15:31:38 +00:00
parent dd1a555973
commit 86f8722c1d
1 changed files with 11 additions and 3 deletions
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14
sys/arch/arm/acpi/acpipchb.c
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@ -1,4 +1,4 @@
/* $NetBSD: acpipchb.c,v 1.27 2021/08/07 21:27:53 jmcneill Exp $ */
/* $NetBSD: acpipchb.c,v 1.28 2021/08/10 15:31:38 jmcneill Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpipchb.c,v 1.27 2021/08/07 21:27:53 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: acpipchb.c,v 1.28 2021/08/10 15:31:38 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -123,7 +123,7 @@ acpipchb_attach(device_t parent, device_t self, void *aux)
struct acpipchb_softc * const sc = device_private(self);
struct acpi_attach_args *aa = aux;
struct pcibus_attach_args pba;
ACPI_INTEGER seg;
ACPI_INTEGER seg, nomsi;
ACPI_STATUS rv;
uint16_t bus_start;
@ -148,6 +148,11 @@ acpipchb_attach(device_t parent, device_t self, void *aux)
seg = 0;
}
if (ACPI_FAILURE(acpi_dsd_integer(sc->sc_handle, "linux,pcie-nomsi",
&nomsi))) {
nomsi = 0;
}
aprint_naive("\n");
aprint_normal(": PCI Express Host Bridge\n");
@ -156,6 +161,9 @@ acpipchb_attach(device_t parent, device_t self, void *aux)
memset(&pba, 0, sizeof(pba));
pba.pba_flags = aa->aa_pciflags &
~(PCI_FLAGS_MEM_OKAY | PCI_FLAGS_IO_OKAY);
if (nomsi) {
pba.pba_flags &= ~(PCI_FLAGS_MSI_OKAY | PCI_FLAGS_MSIX_OKAY);
}
pba.pba_memt = 0;
pba.pba_iot = 0;
pba.pba_dmat = aa->aa_dmat;