C++ rman_release_resource函数代码示例

static int
obio_release_resource(device_t dev, device_t child, int type,
    int rid, struct resource *r)
{
	struct resource_list *rl;
	struct resource_list_entry *rle;

	rl = obio_get_resource_list(dev, child);
	if (rl == NULL)
		return (EINVAL);
	rle = resource_list_find(rl, type, rid);
	if (rle == NULL)
		return (EINVAL);
	rman_release_resource(r);
	rle->res = NULL;

	return (0);
}

static int
chipc_release_resource(device_t dev, device_t child, int type, int rid,
    struct resource *r)
{
	struct chipc_softc		*sc;
	struct chipc_region		*cr;
	struct rman			*rm;
	struct resource_list_entry	*rle;
	int			 	 error;

	sc = device_get_softc(dev);

	/* Handled by parent bus? */
	rm = chipc_get_rman(sc, type);
	if (rm == NULL || !rman_is_region_manager(r, rm)) {
		return (bus_generic_rl_release_resource(dev, child, type, rid,
		    r));
	}

	/* Locate the mapping region */
	cr = chipc_find_region(sc, rman_get_start(r), rman_get_end(r));
	if (cr == NULL)
		return (EINVAL);

	/* Deactivate resources */
	if (rman_get_flags(r) & RF_ACTIVE) {
		error = BUS_DEACTIVATE_RESOURCE(dev, child, type, rid, r);
		if (error)
			return (error);
	}

	if ((error = rman_release_resource(r)))
		return (error);

	/* Drop allocation reference */
	chipc_release_region(sc, cr, RF_ALLOCATED);

	/* Clear reference from the resource list entry if exists */
	rle = resource_list_find(BUS_GET_RESOURCE_LIST(dev, child), type, rid);
	if (rle != NULL)
		rle->res = NULL;

	return (0);
}

static struct resource *
obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
    u_long start, u_long end, u_long count, u_int flags)
{
	struct resource *rv;
	struct rman *rm;
	bus_space_handle_t bh = 0;
	struct obio_softc *sc = device_get_softc(bus);

	switch (type) {
	case SYS_RES_IRQ:
		rm = &sc->oba_irq_rman;
		break;
	case SYS_RES_MEMORY:
		return (NULL);
	case SYS_RES_IOPORT:
		rm = &sc->oba_rman;
		bh = sc->oba_addr;
		start = bh;
		break;
	default:
		return (NULL);
	}


	rv = rman_reserve_resource(rm, start, end, count, flags, child);
	if (rv == NULL) 
		return (NULL);
	if (type == SYS_RES_IRQ)
		return (rv);
	rman_set_rid(rv, *rid);
	rman_set_bustag(rv, mips_bus_space_generic);
	rman_set_bushandle(rv, bh);
	
	if (0) {
		if (bus_activate_resource(child, type, *rid, rv)) {
			rman_release_resource(rv);
			return (NULL);
		}
	}
	return (rv);

}

static int
ofwbus_release_resource(device_t bus, device_t child, int type,
    int rid, struct resource *r)
{
	struct resource_list_entry *rle;
	int error;

	/* Clean resource list entry */
	rle = resource_list_find(BUS_GET_RESOURCE_LIST(bus, child), type, rid);
	if (rle != NULL)
		rle->res = NULL;

	if ((rman_get_flags(r) & RF_ACTIVE) != 0) {
		error = bus_deactivate_resource(child, type, rid, r);
		if (error)
			return (error);
	}
	return (rman_release_resource(r));
}

static int
cbb_pci_release_resource(device_t bus, device_t child, int type, int rid,
    struct resource *r)
{
	struct cbb_softc *sc;
	int error;

	sc = device_get_softc(bus);
	if (type == PCI_RES_BUS) {
		if (!rman_is_region_manager(r, &sc->bus.rman))
			return (EINVAL);
		if (rman_get_flags(r) & RF_ACTIVE) {
			error = bus_deactivate_resource(child, type, rid, r);
			if (error)
				return (error);
		}
		return (rman_release_resource(r));
	}
	return (cbb_release_resource(bus, child, type, rid, r));
}

static int
thunder_pem_release_resource(device_t dev, device_t child, int type, int rid,
    struct resource *res)
{
	device_t parent_dev;
#if defined(NEW_PCIB) && defined(PCI_RES_BUS)
	struct thunder_pem_softc *sc = device_get_softc(dev);

	if (type == PCI_RES_BUS)
		return (pci_domain_release_bus(sc->id, child, rid, res));
#endif
	/* Find parent device. On ThunderX we know an exact path. */
	parent_dev = device_get_parent(device_get_parent(dev));

	if ((type != SYS_RES_MEMORY) && (type != SYS_RES_IOPORT))
		return (BUS_RELEASE_RESOURCE(parent_dev, child,
		    type, rid, res));

	return (rman_release_resource(res));
}

static struct resource *
gpiobus_alloc_resource(device_t bus, device_t child, int type, int *rid,
    u_long start, u_long end, u_long count, u_int flags)
{
	struct gpiobus_softc *sc;
	struct resource *rv;
	struct resource_list *rl;
	struct resource_list_entry *rle;
	int isdefault;

	if (type != SYS_RES_IRQ)
		return (NULL);
	isdefault = (start == 0UL && end == ~0UL && count == 1);
	rle = NULL;
	if (isdefault) {
		rl = BUS_GET_RESOURCE_LIST(bus, child);
		if (rl == NULL)
			return (NULL);
		rle = resource_list_find(rl, type, *rid);
		if (rle == NULL)
			return (NULL);
		if (rle->res != NULL)
			panic("%s: resource entry is busy", __func__);
		start = rle->start;
		count = rle->count;
		end = rle->end;
	}
	sc = device_get_softc(bus);
	rv = rman_reserve_resource(&sc->sc_intr_rman, start, end, count, flags,
	    child);
	if (rv == NULL)
		return (NULL);
	rman_set_rid(rv, *rid);
	if ((flags & RF_ACTIVE) != 0 &&
	    bus_activate_resource(child, type, *rid, rv) != 0) {
		rman_release_resource(rv);
		return (NULL);
	}

	return (rv);
}

/*
 * Allocate resources at the behalf of a child. This only handles interrupts,
 * since i/o resources are usually set up by the firmware, and thus need not
 * be handled here.
 */
static struct resource *
nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
                     u_long start, u_long end, u_long count, u_int flags)
{
    struct	nexus_softc *sc = device_get_softc(bus);
    struct	resource *rv;
    struct	rman *rm;
    int needactivate = flags & RF_ACTIVE;

    flags &= ~RF_ACTIVE;

    switch (type) {
    case SYS_RES_IRQ:
        rm = &sc->sc_intr_rman;
        break;
    case SYS_RES_MEMORY:
        rm = &sc->sc_mem_rman;
        break;
    default:
        return (NULL);
    }

    rv = rman_reserve_resource(rm, start, end, count, flags, child);
    if (rv == NULL)
        return (NULL);
    if (type == SYS_RES_MEMORY) {
        rman_set_bustag(rv, &nexus_bustag);
        rman_set_bushandle(rv, rman_get_start(rv));
    }

    if (needactivate) {
        if (bus_activate_resource(child, type, *rid, rv)) {
            rman_release_resource(rv);
            return (NULL);
        }
    }

    return (rv);
}

int
pci_host_generic_core_release_resource(device_t dev, device_t child, int type,
    int rid, struct resource *res)
{
	struct generic_pcie_core_softc *sc;
	struct rman *rm;

	sc = device_get_softc(dev);

#if defined(NEW_PCIB) && defined(PCI_RES_BUS)
	if (type == PCI_RES_BUS) {
		return (pci_domain_release_bus(sc->ecam, child, rid, res));
	}
#endif

	rm = generic_pcie_rman(sc, type);
	if (rm != NULL) {
		KASSERT(rman_is_region_manager(res, rm), ("rman mismatch"));
		rman_release_resource(res);
	}

	return (bus_generic_release_resource(dev, child, type, rid, res));
}

static struct resource *
apb_alloc_resource(device_t bus, device_t child, int type, int *rid,
    rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
{
	struct apb_softc		*sc = device_get_softc(bus);
	struct apb_ivar			*ivar = device_get_ivars(child);
	struct resource			*rv;
	struct resource_list_entry	*rle;
	struct rman			*rm;
	int				 isdefault, needactivate, passthrough;

	isdefault = (RMAN_IS_DEFAULT_RANGE(start, end));
	needactivate = flags & RF_ACTIVE;
	/*
	 * Pass memory requests to nexus device
	 */
	passthrough = (device_get_parent(child) != bus);
	rle = NULL;

	dprintf("%s: entry (%p, %p, %d, %d, %p, %p, %jd, %d)\n",
	    __func__, bus, child, type, *rid, (void *)(intptr_t)start,
	    (void *)(intptr_t)end, count, flags);

	if (passthrough)
		return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type,
		    rid, start, end, count, flags));

	/*
	 * If this is an allocation of the "default" range for a given RID,
	 * and we know what the resources for this device are (ie. they aren't
	 * maintained by a child bus), then work out the start/end values.
	 */

	if (isdefault) {
		rle = resource_list_find(&ivar->resources, type, *rid);
		if (rle == NULL) {
			return (NULL);
		}

		if (rle->res != NULL) {
			panic("%s: resource entry is busy", __func__);
		}
		start = rle->start;
		end = rle->end;
		count = rle->count;

		dprintf("%s: default resource (%p, %p, %ld)\n",
		    __func__, (void *)(intptr_t)start,
		    (void *)(intptr_t)end, count);
	}

	switch (type) {
	case SYS_RES_IRQ:
		rm = &sc->apb_irq_rman;
		break;
	case SYS_RES_MEMORY:
		rm = &sc->apb_mem_rman;
		break;
	default:
		printf("%s: unknown resource type %d\n", __func__, type);
		return (0);
	}

	rv = rman_reserve_resource(rm, start, end, count, flags, child);
	if (rv == 0) {
		printf("%s: could not reserve resource\n", __func__);
		return (0);
	}

	rman_set_rid(rv, *rid);

	if (needactivate) {
		if (bus_activate_resource(child, type, *rid, rv)) {
			printf("%s: could not activate resource\n", __func__);
			rman_release_resource(rv);
			return (0);
		}
	}

	return (rv);
}

static struct resource *
thunder_pem_alloc_resource(device_t dev, device_t child, int type, int *rid,
    rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
{
	struct thunder_pem_softc *sc = device_get_softc(dev);
	struct rman *rm = NULL;
	struct resource *res;
	device_t parent_dev;

#if defined(NEW_PCIB) && defined(PCI_RES_BUS)
	if (type == PCI_RES_BUS)
		return (pci_domain_alloc_bus(sc->id, child, rid, start,  end,
		    count, flags));
#endif
	rm = thunder_pem_rman(sc, type);
	if (rm == NULL) {
		/* Find parent device. On ThunderX we know an exact path. */
		parent_dev = device_get_parent(device_get_parent(dev));
		return (BUS_ALLOC_RESOURCE(parent_dev, dev, type, rid, start,
		    end, count, flags));
	}


	if (!RMAN_IS_DEFAULT_RANGE(start, end)) {
		/*
		 * We might get PHYS addresses here inherited from EFI.
		 * Convert to PCI if necessary.
		 */
		if (range_addr_is_phys(sc->ranges, start, count)) {
			start = range_addr_phys_to_pci(sc->ranges, start);
			end = start + count - 1;
		}

	}

	if (bootverbose) {
		device_printf(dev,
		    "thunder_pem_alloc_resource: start=%#lx, end=%#lx, count=%#lx\n",
		    start, end, count);
	}

	res = rman_reserve_resource(rm, start, end, count, flags, child);
	if (res == NULL)
		goto fail;

	rman_set_rid(res, *rid);

	if (flags & RF_ACTIVE)
		if (bus_activate_resource(child, type, *rid, res)) {
			rman_release_resource(res);
			goto fail;
		}

	return (res);

fail:
	if (bootverbose) {
		device_printf(dev, "%s FAIL: type=%d, rid=%d, "
		    "start=%016lx, end=%016lx, count=%016lx, flags=%x\n",
		    __func__, type, *rid, start, end, count, flags);
	}

	return (NULL);
}

static struct resource *
fdtbus_alloc_resource(device_t bus, device_t child, int type, int *rid,
    u_long start, u_long end, u_long count, u_int flags)
{
	struct fdtbus_softc *sc;
	struct resource *res;
	struct rman *rm;
	struct fdtbus_devinfo *di;
	struct resource_list_entry *rle;
	int needactivate;

	/*
	 * Request for the default allocation with a given rid: use resource
	 * list stored in the local device info.
	 */
	if ((start == 0UL) && (end == ~0UL)) {
		if ((di = device_get_ivars(child)) == NULL)
			return (NULL);

		if (type == SYS_RES_IOPORT)
			type = SYS_RES_MEMORY;

		rle = resource_list_find(&di->di_res, type, *rid);
		if (rle == NULL) {
			device_printf(bus, "no default resources for "
			    "rid = %d, type = %d\n", *rid, type);
			return (NULL);
		}
		start = rle->start;
		end = rle->end;
		count = rle->count;
	}

	sc = device_get_softc(bus);

	needactivate = flags & RF_ACTIVE;
	flags &= ~RF_ACTIVE;

	switch (type) {
	case SYS_RES_IRQ:
		rm = &sc->sc_irq;
		break;

	case SYS_RES_IOPORT:
	case SYS_RES_MEMORY:
		rm = &sc->sc_mem;
		break;

	default:
		return (NULL);
	}

	res = rman_reserve_resource(rm, start, end, count, flags, child);
	if (res == NULL) {
		device_printf(bus, "failed to reserve resource %#lx - %#lx "
		    "(%#lx)\n", start, end, count);
		return (NULL);
	}

	rman_set_rid(res, *rid);

	if (type == SYS_RES_IOPORT || type == SYS_RES_MEMORY) {
		/* XXX endianess should be set based on SOC node */
		rman_set_bustag(res, fdtbus_bs_tag);
		rman_set_bushandle(res, rman_get_start(res));
	}

	if (needactivate)
		if (bus_activate_resource(child, type, *rid, res)) {
			device_printf(child, "resource activation failed\n");
			rman_release_resource(res);
			return (NULL);
		}

	return (res);
}

int
pci_release_resource(device_t bus, device_t child, int type, int rid,
		       struct resource *r)
{
	return (rman_release_resource(r));
}

static struct resource *
obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
    u_long start, u_long end, u_long count, u_int flags)
{
	struct obio_softc		*sc = device_get_softc(bus);
	struct obio_ivar		*ivar = device_get_ivars(child);
	struct resource			*rv;
	struct resource_list_entry	*rle;
	struct rman			*rm;
	int				 isdefault, needactivate, passthrough;

	isdefault = (start == 0UL && end == ~0UL);
	needactivate = flags & RF_ACTIVE;
	passthrough = (device_get_parent(child) != bus);
	rle = NULL;

	if (passthrough)
		return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type,
		    rid, start, end, count, flags));

	/*
	 * If this is an allocation of the "default" range for a given RID,
	 * and we know what the resources for this device are (ie. they aren't
	 * maintained by a child bus), then work out the start/end values.
	 */
	if (isdefault) {
		rle = resource_list_find(&ivar->resources, type, *rid);
		if (rle == NULL)
			return (NULL);
		if (rle->res != NULL) {
			panic("%s: resource entry is busy", __func__);
		}
		start = rle->start;
		end = rle->end;
		count = rle->count;
	}

	switch (type) {
	case SYS_RES_IRQ:
		rm = &sc->oba_irq_rman;
		break;
	case SYS_RES_MEMORY:
		rm = &sc->oba_mem_rman;
		break;
	default:
		printf("%s: unknown resource type %d\n", __func__, type);
		return (0);
	}

	rv = rman_reserve_resource(rm, start, end, count, flags, child);
	if (rv == 0) {
		printf("%s: could not reserve resource\n", __func__);
		return (0);
	}

	rman_set_rid(rv, *rid);

	if (needactivate) {
		if (bus_activate_resource(child, type, *rid, rv)) {
			printf("%s: could not activate resource\n", __func__);
			rman_release_resource(rv);
			return (0);
		}
	}

	return (rv);
}

//.........这里部分代码省略.........
	struct		rman *rm;
	u_long		adjstart, adjend, adjcount;
	struct		unin_chip_devinfo *dinfo;
	struct		resource_list_entry *rle;

	sc = device_get_softc(bus);
	dinfo = device_get_ivars(child);

	needactivate = flags & RF_ACTIVE;
	flags &= ~RF_ACTIVE;

	switch (type) {
	case SYS_RES_MEMORY:
	case SYS_RES_IOPORT:
		rle = resource_list_find(&dinfo->udi_resources, SYS_RES_MEMORY,
					 *rid);
		if (rle == NULL) {
			device_printf(bus, "no rle for %s memory %d\n",
				      device_get_nameunit(child), *rid);
			return (NULL);
		}

		rle->end = rle->end - 1; /* Hack? */

		if (start < rle->start)
			adjstart = rle->start;
		else if (start > rle->end)
			adjstart = rle->end;
		else
			adjstart = start;

		if (end < rle->start)
			adjend = rle->start;
		else if (end > rle->end)
			adjend = rle->end;
		else
			adjend = end;

		adjcount = adjend - adjstart;

		rm = &sc->sc_mem_rman;
		break;

	case SYS_RES_IRQ:
		/* Check for passthrough from subattachments. */
		if (device_get_parent(child) != bus)
			return BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
						  type, rid, start, end, count,
						  flags);

		rle = resource_list_find(&dinfo->udi_resources, SYS_RES_IRQ,
		    *rid);
		if (rle == NULL) {
			if (dinfo->udi_ninterrupts >= 6) {
				device_printf(bus,
					      "%s has more than 6 interrupts\n",
					      device_get_nameunit(child));
				return (NULL);
			}
			resource_list_add(&dinfo->udi_resources, SYS_RES_IRQ,
					  dinfo->udi_ninterrupts, start, start,
					  1);

			dinfo->udi_interrupts[dinfo->udi_ninterrupts] = start;
			dinfo->udi_ninterrupts++;
		}

		return (resource_list_alloc(&dinfo->udi_resources, bus, child,
					    type, rid, start, end, count,
					    flags));
	default:
		device_printf(bus, "unknown resource request from %s\n",
			      device_get_nameunit(child));
		return (NULL);
	}

	rv = rman_reserve_resource(rm, adjstart, adjend, adjcount, flags,
				   child);
	if (rv == NULL) {
		device_printf(bus,
			      "failed to reserve resource %#lx - %#lx (%#lx)"
			      " for %s\n", adjstart, adjend, adjcount,
			      device_get_nameunit(child));
		return (NULL);
	}

	rman_set_rid(rv, *rid);

	if (needactivate) {
		if (bus_activate_resource(child, type, *rid, rv) != 0) {
                        device_printf(bus,
				      "failed to activate resource for %s\n",
				      device_get_nameunit(child));
			rman_release_resource(rv);
			return (NULL);
                }
        }

	return (rv);
}