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bus: Add ACPI locator support
Add support for printing ACPI paths. This is a bit of a degenerate case for this interface since it's always just the device handle if the device has one. But it is illustrtive of how to do this for a few nodes in the tree. Sponsored by: Netflix Reviewed by: jhb Differential Revision: https://reviews.freebsd.org/D32748
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@ -187,6 +187,8 @@ static int acpi_child_location_method(device_t acdev, device_t child,
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struct sbuf *sb);
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static int acpi_child_pnpinfo_method(device_t acdev, device_t child,
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struct sbuf *sb);
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static int acpi_get_device_path(device_t bus, device_t child,
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const char *locator, struct sbuf *sb);
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static void acpi_enable_pcie(void);
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static void acpi_hint_device_unit(device_t acdev, device_t child,
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const char *name, int *unitp);
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@ -226,6 +228,7 @@ static device_method_t acpi_methods[] = {
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DEVMETHOD(bus_get_cpus, acpi_get_cpus),
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DEVMETHOD(bus_get_domain, acpi_get_domain),
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DEVMETHOD(bus_get_property, acpi_bus_get_prop),
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DEVMETHOD(bus_get_device_path, acpi_get_device_path),
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/* ACPI bus */
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DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
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@ -928,6 +931,37 @@ acpi_child_pnpinfo_method(device_t cbdev, device_t child, struct sbuf *sb)
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return (acpi_pnpinfo(dinfo->ad_handle, sb));
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}
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/*
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* Note: the check for ACPI locator may be reduntant. However, this routine is
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* suitable for both busses whose only locator is ACPI and as a building block
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* for busses that have multiple locators to cope with.
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*/
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int
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acpi_get_acpi_device_path(device_t bus, device_t child, const char *locator, struct sbuf *sb)
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{
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if (strcmp(locator, BUS_LOCATOR_ACPI) == 0) {
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ACPI_HANDLE *handle = acpi_get_handle(child);
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if (handle != NULL)
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sbuf_printf(sb, "%s", acpi_name(handle));
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return (0);
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}
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return (bus_generic_get_device_path(bus, child, locator, sb));
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}
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static int
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acpi_get_device_path(device_t bus, device_t child, const char *locator, struct sbuf *sb)
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{
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struct acpi_device *dinfo = device_get_ivars(child);
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if (strcmp(locator, BUS_LOCATOR_ACPI) == 0)
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return (acpi_get_acpi_device_path(bus, child, locator, sb));
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/* For the rest, punt to the default handler */
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return (bus_generic_get_device_path(bus, child, locator, sb));
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}
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/*
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* Handle device deletion.
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*/
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@ -81,6 +81,8 @@ static int acpi_pci_attach(device_t dev);
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static void acpi_pci_child_deleted(device_t dev, device_t child);
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static int acpi_pci_child_location_method(device_t cbdev,
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device_t child, struct sbuf *sb);
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static int acpi_pci_get_device_path(device_t cbdev,
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device_t child, const char *locator, struct sbuf *sb);
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static int acpi_pci_detach(device_t dev);
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static int acpi_pci_probe(device_t dev);
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static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
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@ -105,6 +107,7 @@ static device_method_t acpi_pci_methods[] = {
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DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar),
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DEVMETHOD(bus_child_deleted, acpi_pci_child_deleted),
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DEVMETHOD(bus_child_location, acpi_pci_child_location_method),
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DEVMETHOD(bus_get_device_path, acpi_pci_get_device_path),
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DEVMETHOD(bus_get_cpus, acpi_get_cpus),
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DEVMETHOD(bus_get_dma_tag, acpi_pci_get_dma_tag),
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DEVMETHOD(bus_get_domain, acpi_get_domain),
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@ -196,6 +199,17 @@ acpi_pci_child_location_method(device_t cbdev, device_t child, struct sbuf *sb)
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return (0);
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}
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static int
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acpi_pci_get_device_path(device_t bus, device_t child, const char *locator, struct sbuf *sb)
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{
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if (strcmp(locator, BUS_LOCATOR_ACPI) == 0)
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return (acpi_get_acpi_device_path(bus, child, locator, sb));
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/* For the rest, punt to the default handler */
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return (bus_generic_get_device_path(bus, child, locator, sb));
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}
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/*
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* PCI power manangement
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*/
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@ -495,6 +495,8 @@ acpi_get_verbose(struct acpi_softc *sc)
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char *acpi_name(ACPI_HANDLE handle);
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int acpi_avoid(ACPI_HANDLE handle);
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int acpi_disabled(char *subsys);
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int acpi_get_acpi_device_path(device_t bus, device_t child,
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const char *locator, struct sbuf *sb);
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int acpi_machdep_init(device_t dev);
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void acpi_install_wakeup_handler(struct acpi_softc *sc);
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int acpi_sleep_machdep(struct acpi_softc *sc, int state);
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@ -764,6 +764,7 @@ static device_method_t acpi_iicbus_methods[] = {
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DEVMETHOD(bus_write_ivar, acpi_iicbus_write_ivar),
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DEVMETHOD(bus_child_location, acpi_iicbus_child_location),
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DEVMETHOD(bus_child_pnpinfo, acpi_iicbus_child_pnpinfo),
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DEVMETHOD(bus_get_device_path, acpi_get_acpi_device_path),
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DEVMETHOD_END,
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};
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@ -265,6 +265,7 @@ static device_method_t nvdimm_acpi_methods[] = {
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DEVMETHOD(bus_read_ivar, nvdimm_root_read_ivar),
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DEVMETHOD(bus_write_ivar, nvdimm_root_write_ivar),
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DEVMETHOD(bus_child_location, nvdimm_root_child_location),
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DEVMETHOD(bus_get_device_path, acpi_get_acpi_device_path),
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DEVMETHOD_END
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};
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@ -553,11 +553,22 @@ acpi_uhub_child_location(device_t parent, device_t child, struct sbuf *sb)
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return (0);
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}
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static int
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acpi_uhub_get_device_path(device_t bus, device_t child, const char *locator, struct sbuf *sb)
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{
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if (strcmp(locator, BUS_LOCATOR_ACPI) == 0)
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return (acpi_get_acpi_device_path(bus, child, locator, sb));
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/* For the rest, punt to the default handler */
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return (bus_generic_get_device_path(bus, child, locator, sb));
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}
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static device_method_t acpi_uhub_methods[] = {
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DEVMETHOD(device_probe, acpi_uhub_probe),
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DEVMETHOD(device_attach, acpi_uhub_attach),
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DEVMETHOD(device_detach, acpi_uhub_detach),
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DEVMETHOD(bus_child_location, acpi_uhub_child_location),
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DEVMETHOD(bus_get_device_path, acpi_uhub_get_device_path),
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DEVMETHOD(bus_read_ivar, acpi_uhub_read_ivar),
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DEVMETHOD_END
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@ -569,6 +580,7 @@ static device_method_t acpi_uhub_root_methods[] = {
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DEVMETHOD(device_detach, acpi_uhub_detach),
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DEVMETHOD(bus_read_ivar, acpi_uhub_read_ivar),
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DEVMETHOD(bus_child_location, acpi_uhub_child_location),
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DEVMETHOD(bus_get_device_path, acpi_uhub_get_device_path),
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DEVMETHOD_END
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};
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@ -4645,9 +4645,19 @@ bus_generic_get_device_path(device_t bus, device_t child, const char *locator,
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int rv = 0;
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device_t parent;
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/*
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* We don't recurse on ACPI since either we know the handle for the
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* device or we don't. And if we're in the generic routine, we don't
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* have a ACPI override. All other locators build up a path by having
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* their parents create a path and then adding the path element for this
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* node. That's why we recurse with parent, bus rather than the typical
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* parent, child: each spot in the tree is independent of what our child
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* will do with this path.
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*/
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parent = device_get_parent(bus);
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if (parent != NULL)
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if (parent != NULL && strcmp(locator, BUS_LOCATOR_ACPI) != 0) {
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rv = BUS_GET_DEVICE_PATH(parent, bus, locator, sb);
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}
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if (strcmp(locator, BUS_LOCATOR_FREEBSD) == 0) {
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if (rv == 0) {
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sbuf_printf(sb, "/%s", device_get_nameunit(child));
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@ -737,6 +737,7 @@ void bus_data_generation_update(void);
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#define BUS_PASS_ORDER_LATE 7
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#define BUS_PASS_ORDER_LAST 9
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#define BUS_LOCATOR_ACPI "ACPI"
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#define BUS_LOCATOR_FREEBSD "FreeBSD"
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extern int bus_current_pass;
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