Module Name: src
Committed By: skrll
Date: Tue Sep 6 11:55:07 UTC 2022
Modified Files:
src/sys/arch/arm/fdt: pcihost_fdt.c pcihost_fdtvar.h
Log Message:
pcihost: Track MSI/MSI-X interrupt handlers.
Track the MSI/MSI-X interrupt handlers so that fdtbus_intr_disestablish
doesn't get called for them.
This avoids a KASSERT firing when using 'drvctl -d' on a pci device that
uses MSI/MSI-X interrupts.
To generate a diff of this commit:
cvs rdiff -u -r1.30 -r1.31 src/sys/arch/arm/fdt/pcihost_fdt.c
cvs rdiff -u -r1.4 -r1.5 src/sys/arch/arm/fdt/pcihost_fdtvar.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/arm/fdt/pcihost_fdt.c
diff -u src/sys/arch/arm/fdt/pcihost_fdt.c:1.30 src/sys/arch/arm/fdt/pcihost_fdt.c:1.31
--- src/sys/arch/arm/fdt/pcihost_fdt.c:1.30 Sun Sep 4 16:01:25 2022
+++ src/sys/arch/arm/fdt/pcihost_fdt.c Tue Sep 6 11:55:07 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: pcihost_fdt.c,v 1.30 2022/09/04 16:01:25 skrll Exp $ */
+/* $NetBSD: pcihost_fdt.c,v 1.31 2022/09/06 11:55:07 skrll Exp $ */
/*-
* Copyright (c) 2018 Jared D. McNeill <jmcne...@invisible.ca>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pcihost_fdt.c,v 1.30 2022/09/04 16:01:25 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pcihost_fdt.c,v 1.31 2022/09/06 11:55:07 skrll Exp $");
#include <sys/param.h>
@@ -101,6 +101,12 @@ static const struct device_compatible_en
DEVICE_COMPAT_EOL
};
+struct pcihost_msi_handler {
+ LIST_ENTRY(pcihost_msi_handler) pmh_next;
+ void *pmh_ih;
+};
+
+
static int
pcihost_match(device_t parent, cfdata_t cf, void *aux)
{
@@ -178,6 +184,8 @@ pcihost_init2(struct pcihost_softc *sc)
if (of_getprop_uint32(sc->sc_phandle, "linux,pci-domain", &sc->sc_seg))
sc->sc_seg = pcihost_segment++;
+ mutex_init(&sc->sc_msi_handlers_mutex, MUTEX_DEFAULT, IPL_NONE);
+
if (pcihost_config(sc) != 0)
return;
@@ -601,18 +609,30 @@ pcihost_intr_setattr(void *v, pci_intr_h
}
static void *
-pcihost_intr_establish(void *v, pci_intr_handle_t ih, int ipl,
+pcihost_intr_establish(void *v, pci_intr_handle_t pih, int ipl,
int (*callback)(void *), void *arg, const char *xname)
{
struct pcihost_softc *sc = v;
- const int flags = (ih & ARM_PCI_INTR_MPSAFE) ? FDT_INTR_MPSAFE : 0;
+ const int flags = (pih & ARM_PCI_INTR_MPSAFE) ? FDT_INTR_MPSAFE : 0;
const u_int *specifier;
int ihandle;
- if ((ih & (ARM_PCI_INTR_MSI | ARM_PCI_INTR_MSIX)) != 0)
- return arm_pci_msi_intr_establish(&sc->sc_pc, ih, ipl, callback, arg, xname);
+ if ((pih & (ARM_PCI_INTR_MSI | ARM_PCI_INTR_MSIX)) != 0) {
+ void *ih = arm_pci_msi_intr_establish(&sc->sc_pc, pih, ipl,
+ callback, arg, xname);
+
+ if (ih) {
+ struct pcihost_msi_handler * const pmh =
+ kmem_alloc(sizeof(*pmh), KM_SLEEP);
+ pmh->pmh_ih = ih;
+ mutex_enter(&sc->sc_msi_handlers_mutex);
+ LIST_INSERT_HEAD(&sc->sc_msi_handlers, pmh, pmh_next);
+ mutex_exit(&sc->sc_msi_handlers_mutex);
+ }
+ return ih;
+ }
- specifier = pcihost_find_intr(sc, ih & ARM_PCI_INTR_IRQ, &ihandle);
+ specifier = pcihost_find_intr(sc, pih & ARM_PCI_INTR_IRQ, &ihandle);
if (specifier == NULL)
return NULL;
@@ -625,6 +645,18 @@ pcihost_intr_disestablish(void *v, void
{
struct pcihost_softc *sc = v;
+ mutex_enter(&sc->sc_msi_handlers_mutex);
+ struct pcihost_msi_handler *pmh;
+ LIST_FOREACH(pmh, &sc->sc_msi_handlers, pmh_next) {
+ if (pmh->pmh_ih == vih) {
+ LIST_REMOVE(pmh, pmh_next);
+ mutex_exit(&sc->sc_msi_handlers_mutex);
+ kmem_free(pmh, sizeof(*pmh));
+ return;
+ }
+ }
+ mutex_exit(&sc->sc_msi_handlers_mutex);
+
fdtbus_intr_disestablish(sc->sc_phandle, vih);
}
Index: src/sys/arch/arm/fdt/pcihost_fdtvar.h
diff -u src/sys/arch/arm/fdt/pcihost_fdtvar.h:1.4 src/sys/arch/arm/fdt/pcihost_fdtvar.h:1.5
--- src/sys/arch/arm/fdt/pcihost_fdtvar.h:1.4 Mon Sep 6 14:03:17 2021
+++ src/sys/arch/arm/fdt/pcihost_fdtvar.h Tue Sep 6 11:55:07 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: pcihost_fdtvar.h,v 1.4 2021/09/06 14:03:17 jmcneill Exp $ */
+/* $NetBSD: pcihost_fdtvar.h,v 1.5 2022/09/06 11:55:07 skrll Exp $ */
/*-
* Copyright (c) 2018 Jared D. McNeill <jmcne...@invisible.ca>
@@ -47,6 +47,8 @@ enum pcihost_type {
PCIHOST_ECAM,
};
+struct pcihost_msi_handlers;
+
struct pcih_bus_space {
struct bus_space bst;
@@ -85,6 +87,10 @@ struct pcihost_softc {
const u_int *sc_pci_ranges;
u_int sc_pci_ranges_cells;
+
+ kmutex_t sc_msi_handlers_mutex;
+ LIST_HEAD(, pcihost_msi_handler)
+ sc_msi_handlers;
};
void pcihost_init2(struct pcihost_softc *);
