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Differential D44131 Diff 135120 sys/dev/pci/isa_pci.c

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sys/dev/pci/isa_pci.c

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#include <machine/resource.h> #include <machine/resource.h>
static int isab_pci_probe(device_t dev); static int isab_pci_probe(device_t dev);
static int isab_pci_attach(device_t dev); static int isab_pci_attach(device_t dev);
static struct resource * isab_pci_alloc_resource(device_t dev, static struct resource * isab_pci_alloc_resource(device_t dev,
device_t child, int type, int *rid, rman_res_t start, rman_res_t end, device_t child, int type, int *rid, rman_res_t start, rman_res_t end,
rman_res_t count, u_int flags); rman_res_t count, u_int flags);
static int isab_pci_release_resource(device_t dev, device_t child, static int isab_pci_release_resource(device_t dev, device_t child,
int type, int rid, struct resource *r); struct resource *r);
static device_method_t isab_methods[] = { static device_method_t isab_methods[] = {
/* Device interface */ /* Device interface */
DEVMETHOD(device_probe, isab_pci_probe), DEVMETHOD(device_probe, isab_pci_probe),
DEVMETHOD(device_attach, isab_pci_attach), DEVMETHOD(device_attach, isab_pci_attach),
DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_suspend, bus_generic_suspend),
▲ Show 20 Lines • Show All 127 Lines • ▼ Show 20 Lines case SYS_RES_IOPORT:
return (sc->isab_pci_res[bar].ip_res); return (sc->isab_pci_res[bar].ip_res);
} }
return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child, type, rid, return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child, type, rid,
start, end, count, flags)); start, end, count, flags));
} }
static int static int
isab_pci_release_resource(device_t dev, device_t child, int type, int rid, isab_pci_release_resource(device_t dev, device_t child, struct resource *r)
struct resource *r)
{ {
struct isab_pci_softc *sc; struct isab_pci_softc *sc;
int bar, error; int bar, error;
if (device_get_parent(child) != dev) if (device_get_parent(child) != dev)
return bus_generic_release_resource(dev, child, type, rid, r); return bus_generic_release_resource(dev, child, r);
switch (type) { switch (rman_get_type(r)) {
case SYS_RES_MEMORY: case SYS_RES_MEMORY:
case SYS_RES_IOPORT: case SYS_RES_IOPORT:
/* /*
* For BARs, we release the resource from the PCI bus * For BARs, we release the resource from the PCI bus
* when the last child reference goes away. * when the last child reference goes away.
*/ */
bar = PCI_RID2BAR(rid); bar = PCI_RID2BAR(rman_get_rid(r));
if (bar < 0 || bar > PCIR_MAX_BAR_0) if (bar < 0 || bar > PCIR_MAX_BAR_0)
return (EINVAL); return (EINVAL);
sc = device_get_softc(dev); sc = device_get_softc(dev);
if (sc->isab_pci_res[bar].ip_res == NULL) if (sc->isab_pci_res[bar].ip_res == NULL)
return (EINVAL); return (EINVAL);
KASSERT(sc->isab_pci_res[bar].ip_res == r, KASSERT(sc->isab_pci_res[bar].ip_res == r,
("isa_pci resource mismatch")); ("isa_pci resource mismatch"));
if (sc->isab_pci_res[bar].ip_refs > 1) { if (sc->isab_pci_res[bar].ip_refs > 1) {
sc->isab_pci_res[bar].ip_refs--; sc->isab_pci_res[bar].ip_refs--;
return (0); return (0);
} }
KASSERT(sc->isab_pci_res[bar].ip_refs > 0, KASSERT(sc->isab_pci_res[bar].ip_refs > 0,
("isa_pci resource reference count underflow")); ("isa_pci resource reference count underflow"));
error = bus_release_resource(dev, type, rid, r); error = bus_release_resource(dev, r);
if (error == 0) { if (error == 0) {
sc->isab_pci_res[bar].ip_res = NULL; sc->isab_pci_res[bar].ip_res = NULL;
sc->isab_pci_res[bar].ip_refs = 0; sc->isab_pci_res[bar].ip_refs = 0;
} }
return (error); return (error);
} }
return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child, type, return (bus_generic_release_resource(dev, child, r));
rid, r));
} }