diff options
Diffstat (limited to 'qemu/hw/ppc/spapr_drc.c')
| -rw-r--r-- | qemu/hw/ppc/spapr_drc.c | 843 |
1 files changed, 0 insertions, 843 deletions
diff --git a/qemu/hw/ppc/spapr_drc.c b/qemu/hw/ppc/spapr_drc.c deleted file mode 100644 index 1f5f1d790..000000000 --- a/qemu/hw/ppc/spapr_drc.c +++ /dev/null @@ -1,843 +0,0 @@ -/* - * QEMU SPAPR Dynamic Reconfiguration Connector Implementation - * - * Copyright IBM Corp. 2014 - * - * Authors: - * Michael Roth <mdroth@linux.vnet.ibm.com> - * - * This work is licensed under the terms of the GNU GPL, version 2 or later. - * See the COPYING file in the top-level directory. - */ - -#include "qemu/osdep.h" -#include "qapi/error.h" -#include "cpu.h" -#include "qemu/cutils.h" -#include "hw/ppc/spapr_drc.h" -#include "qom/object.h" -#include "hw/qdev.h" -#include "qapi/visitor.h" -#include "qemu/error-report.h" -#include "hw/ppc/spapr.h" /* for RTAS return codes */ - -/* #define DEBUG_SPAPR_DRC */ - -#ifdef DEBUG_SPAPR_DRC -#define DPRINTF(fmt, ...) \ - do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) -#define DPRINTFN(fmt, ...) \ - do { DPRINTF(fmt, ## __VA_ARGS__); fprintf(stderr, "\n"); } while (0) -#else -#define DPRINTF(fmt, ...) \ - do { } while (0) -#define DPRINTFN(fmt, ...) \ - do { } while (0) -#endif - -#define DRC_CONTAINER_PATH "/dr-connector" -#define DRC_INDEX_TYPE_SHIFT 28 -#define DRC_INDEX_ID_MASK ((1ULL << DRC_INDEX_TYPE_SHIFT) - 1) - -static sPAPRDRConnectorTypeShift get_type_shift(sPAPRDRConnectorType type) -{ - uint32_t shift = 0; - - /* make sure this isn't SPAPR_DR_CONNECTOR_TYPE_ANY, or some - * other wonky value. - */ - g_assert(is_power_of_2(type)); - - while (type != (1 << shift)) { - shift++; - } - return shift; -} - -static uint32_t get_index(sPAPRDRConnector *drc) -{ - /* no set format for a drc index: it only needs to be globally - * unique. this is how we encode the DRC type on bare-metal - * however, so might as well do that here - */ - return (get_type_shift(drc->type) << DRC_INDEX_TYPE_SHIFT) | - (drc->id & DRC_INDEX_ID_MASK); -} - -static uint32_t set_isolation_state(sPAPRDRConnector *drc, - sPAPRDRIsolationState state) -{ - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - - DPRINTFN("drc: %x, set_isolation_state: %x", get_index(drc), state); - - if (state == SPAPR_DR_ISOLATION_STATE_UNISOLATED) { - /* cannot unisolate a non-existant resource, and, or resources - * which are in an 'UNUSABLE' allocation state. (PAPR 2.7, 13.5.3.5) - */ - if (!drc->dev || - drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { - return RTAS_OUT_NO_SUCH_INDICATOR; - } - } - - drc->isolation_state = state; - - if (drc->isolation_state == SPAPR_DR_ISOLATION_STATE_ISOLATED) { - /* if we're awaiting release, but still in an unconfigured state, - * it's likely the guest is still in the process of configuring - * the device and is transitioning the devices to an ISOLATED - * state as a part of that process. so we only complete the - * removal when this transition happens for a device in a - * configured state, as suggested by the state diagram from - * PAPR+ 2.7, 13.4 - */ - if (drc->awaiting_release) { - if (drc->configured) { - DPRINTFN("finalizing device removal"); - drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, - drc->detach_cb_opaque, NULL); - } else { - DPRINTFN("deferring device removal on unconfigured device\n"); - } - } - drc->configured = false; - } - - return RTAS_OUT_SUCCESS; -} - -static uint32_t set_indicator_state(sPAPRDRConnector *drc, - sPAPRDRIndicatorState state) -{ - DPRINTFN("drc: %x, set_indicator_state: %x", get_index(drc), state); - drc->indicator_state = state; - return RTAS_OUT_SUCCESS; -} - -static uint32_t set_allocation_state(sPAPRDRConnector *drc, - sPAPRDRAllocationState state) -{ - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - - DPRINTFN("drc: %x, set_allocation_state: %x", get_index(drc), state); - - if (state == SPAPR_DR_ALLOCATION_STATE_USABLE) { - /* if there's no resource/device associated with the DRC, there's - * no way for us to put it in an allocation state consistent with - * being 'USABLE'. PAPR 2.7, 13.5.3.4 documents that this should - * result in an RTAS return code of -3 / "no such indicator" - */ - if (!drc->dev) { - return RTAS_OUT_NO_SUCH_INDICATOR; - } - } - - if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI) { - drc->allocation_state = state; - if (drc->awaiting_release && - drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { - DPRINTFN("finalizing device removal"); - drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, - drc->detach_cb_opaque, NULL); - } - } - return RTAS_OUT_SUCCESS; -} - -static uint32_t get_type(sPAPRDRConnector *drc) -{ - return drc->type; -} - -static const char *get_name(sPAPRDRConnector *drc) -{ - return drc->name; -} - -static const void *get_fdt(sPAPRDRConnector *drc, int *fdt_start_offset) -{ - if (fdt_start_offset) { - *fdt_start_offset = drc->fdt_start_offset; - } - return drc->fdt; -} - -static void set_configured(sPAPRDRConnector *drc) -{ - DPRINTFN("drc: %x, set_configured", get_index(drc)); - - if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_UNISOLATED) { - /* guest should be not configuring an isolated device */ - DPRINTFN("drc: %x, set_configured: skipping isolated device", - get_index(drc)); - return; - } - drc->configured = true; -} - -/* has the guest been notified of device attachment? */ -static void set_signalled(sPAPRDRConnector *drc) -{ - drc->signalled = true; -} - -/* - * dr-entity-sense sensor value - * returned via get-sensor-state RTAS calls - * as expected by state diagram in PAPR+ 2.7, 13.4 - * based on the current allocation/indicator/power states - * for the DR connector. - */ -static uint32_t entity_sense(sPAPRDRConnector *drc, sPAPRDREntitySense *state) -{ - if (drc->dev) { - if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && - drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { - /* for logical DR, we return a state of UNUSABLE - * iff the allocation state UNUSABLE. - * Otherwise, report the state as USABLE/PRESENT, - * as we would for PCI. - */ - *state = SPAPR_DR_ENTITY_SENSE_UNUSABLE; - } else { - /* this assumes all PCI devices are assigned to - * a 'live insertion' power domain, where QEMU - * manages power state automatically as opposed - * to the guest. present, non-PCI resources are - * unaffected by power state. - */ - *state = SPAPR_DR_ENTITY_SENSE_PRESENT; - } - } else { - if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { - /* PCI devices, and only PCI devices, use EMPTY - * in cases where we'd otherwise use UNUSABLE - */ - *state = SPAPR_DR_ENTITY_SENSE_EMPTY; - } else { - *state = SPAPR_DR_ENTITY_SENSE_UNUSABLE; - } - } - - DPRINTFN("drc: %x, entity_sense: %x", get_index(drc), state); - return RTAS_OUT_SUCCESS; -} - -static void prop_get_index(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - uint32_t value = (uint32_t)drck->get_index(drc); - visit_type_uint32(v, name, &value, errp); -} - -static void prop_get_type(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - uint32_t value = (uint32_t)drck->get_type(drc); - visit_type_uint32(v, name, &value, errp); -} - -static char *prop_get_name(Object *obj, Error **errp) -{ - sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - return g_strdup(drck->get_name(drc)); -} - -static void prop_get_entity_sense(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - uint32_t value; - - drck->entity_sense(drc, &value); - visit_type_uint32(v, name, &value, errp); -} - -static void prop_get_fdt(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); - Error *err = NULL; - int fdt_offset_next, fdt_offset, fdt_depth; - void *fdt; - - if (!drc->fdt) { - visit_start_struct(v, name, NULL, 0, &err); - if (!err) { - visit_end_struct(v, &err); - } - error_propagate(errp, err); - return; - } - - fdt = drc->fdt; - fdt_offset = drc->fdt_start_offset; - fdt_depth = 0; - - do { - const char *name = NULL; - const struct fdt_property *prop = NULL; - int prop_len = 0, name_len = 0; - uint32_t tag; - - tag = fdt_next_tag(fdt, fdt_offset, &fdt_offset_next); - switch (tag) { - case FDT_BEGIN_NODE: - fdt_depth++; - name = fdt_get_name(fdt, fdt_offset, &name_len); - visit_start_struct(v, name, NULL, 0, &err); - if (err) { - error_propagate(errp, err); - return; - } - break; - case FDT_END_NODE: - /* shouldn't ever see an FDT_END_NODE before FDT_BEGIN_NODE */ - g_assert(fdt_depth > 0); - visit_end_struct(v, &err); - if (err) { - error_propagate(errp, err); - return; - } - fdt_depth--; - break; - case FDT_PROP: { - int i; - prop = fdt_get_property_by_offset(fdt, fdt_offset, &prop_len); - name = fdt_string(fdt, fdt32_to_cpu(prop->nameoff)); - visit_start_list(v, name, &err); - if (err) { - error_propagate(errp, err); - return; - } - for (i = 0; i < prop_len; i++) { - visit_type_uint8(v, NULL, (uint8_t *)&prop->data[i], &err); - if (err) { - error_propagate(errp, err); - return; - } - } - visit_end_list(v); - break; - } - default: - error_setg(&error_abort, "device FDT in unexpected state: %d", tag); - } - fdt_offset = fdt_offset_next; - } while (fdt_depth != 0); -} - -static void attach(sPAPRDRConnector *drc, DeviceState *d, void *fdt, - int fdt_start_offset, bool coldplug, Error **errp) -{ - DPRINTFN("drc: %x, attach", get_index(drc)); - - if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) { - error_setg(errp, "an attached device is still awaiting release"); - return; - } - if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { - g_assert(drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_USABLE); - } - g_assert(fdt || coldplug); - - /* NOTE: setting initial isolation state to UNISOLATED means we can't - * detach unless guest has a userspace/kernel that moves this state - * back to ISOLATED in response to an unplug event, or this is done - * manually by the admin prior. if we force things while the guest - * may be accessing the device, we can easily crash the guest, so we - * we defer completion of removal in such cases to the reset() hook. - */ - if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { - drc->isolation_state = SPAPR_DR_ISOLATION_STATE_UNISOLATED; - } - drc->indicator_state = SPAPR_DR_INDICATOR_STATE_ACTIVE; - - drc->dev = d; - drc->fdt = fdt; - drc->fdt_start_offset = fdt_start_offset; - drc->configured = coldplug; - /* 'logical' DR resources such as memory/cpus are in some cases treated - * as a pool of resources from which the guest is free to choose from - * based on only a count. for resources that can be assigned in this - * fashion, we must assume the resource is signalled immediately - * since a single hotplug request might make an arbitrary number of - * such attached resources available to the guest, as opposed to - * 'physical' DR resources such as PCI where each device/resource is - * signalled individually. - */ - drc->signalled = (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI) - ? true : coldplug; - - object_property_add_link(OBJECT(drc), "device", - object_get_typename(OBJECT(drc->dev)), - (Object **)(&drc->dev), - NULL, 0, NULL); -} - -static void detach(sPAPRDRConnector *drc, DeviceState *d, - spapr_drc_detach_cb *detach_cb, - void *detach_cb_opaque, Error **errp) -{ - DPRINTFN("drc: %x, detach", get_index(drc)); - - drc->detach_cb = detach_cb; - drc->detach_cb_opaque = detach_cb_opaque; - - /* if we've signalled device presence to the guest, or if the guest - * has gone ahead and configured the device (via manually-executed - * device add via drmgr in guest, namely), we need to wait - * for the guest to quiesce the device before completing detach. - * Otherwise, we can assume the guest hasn't seen it and complete the - * detach immediately. Note that there is a small race window - * just before, or during, configuration, which is this context - * refers mainly to fetching the device tree via RTAS. - * During this window the device access will be arbitrated by - * associated DRC, which will simply fail the RTAS calls as invalid. - * This is recoverable within guest and current implementations of - * drmgr should be able to cope. - */ - if (!drc->signalled && !drc->configured) { - /* if the guest hasn't seen the device we can't rely on it to - * set it back to an isolated state via RTAS, so do it here manually - */ - drc->isolation_state = SPAPR_DR_ISOLATION_STATE_ISOLATED; - } - - if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) { - DPRINTFN("awaiting transition to isolated state before removal"); - drc->awaiting_release = true; - return; - } - - if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && - drc->allocation_state != SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { - DPRINTFN("awaiting transition to unusable state before removal"); - drc->awaiting_release = true; - return; - } - - drc->indicator_state = SPAPR_DR_INDICATOR_STATE_INACTIVE; - - if (drc->detach_cb) { - drc->detach_cb(drc->dev, drc->detach_cb_opaque); - } - - drc->awaiting_release = false; - g_free(drc->fdt); - drc->fdt = NULL; - drc->fdt_start_offset = 0; - object_property_del(OBJECT(drc), "device", NULL); - drc->dev = NULL; - drc->detach_cb = NULL; - drc->detach_cb_opaque = NULL; -} - -static bool release_pending(sPAPRDRConnector *drc) -{ - return drc->awaiting_release; -} - -static void reset(DeviceState *d) -{ - sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - sPAPRDREntitySense state; - - DPRINTFN("drc reset: %x", drck->get_index(drc)); - /* immediately upon reset we can safely assume DRCs whose devices - * are pending removal can be safely removed, and that they will - * subsequently be left in an ISOLATED state. move the DRC to this - * state in these cases (which will in turn complete any pending - * device removals) - */ - if (drc->awaiting_release) { - drck->set_isolation_state(drc, SPAPR_DR_ISOLATION_STATE_ISOLATED); - /* generally this should also finalize the removal, but if the device - * hasn't yet been configured we normally defer removal under the - * assumption that this transition is taking place as part of device - * configuration. so check if we're still waiting after this, and - * force removal if we are - */ - if (drc->awaiting_release) { - drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, - drc->detach_cb_opaque, NULL); - } - - /* non-PCI devices may be awaiting a transition to UNUSABLE */ - if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && - drc->awaiting_release) { - drck->set_allocation_state(drc, SPAPR_DR_ALLOCATION_STATE_UNUSABLE); - } - } - - drck->entity_sense(drc, &state); - if (state == SPAPR_DR_ENTITY_SENSE_PRESENT) { - drck->set_signalled(drc); - } -} - -static void realize(DeviceState *d, Error **errp) -{ - sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - Object *root_container; - char link_name[256]; - gchar *child_name; - Error *err = NULL; - - DPRINTFN("drc realize: %x", drck->get_index(drc)); - /* NOTE: we do this as part of realize/unrealize due to the fact - * that the guest will communicate with the DRC via RTAS calls - * referencing the global DRC index. By unlinking the DRC - * from DRC_CONTAINER_PATH/<drc_index> we effectively make it - * inaccessible by the guest, since lookups rely on this path - * existing in the composition tree - */ - root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); - snprintf(link_name, sizeof(link_name), "%x", drck->get_index(drc)); - child_name = object_get_canonical_path_component(OBJECT(drc)); - DPRINTFN("drc child name: %s", child_name); - object_property_add_alias(root_container, link_name, - drc->owner, child_name, &err); - if (err) { - error_report_err(err); - object_unref(OBJECT(drc)); - } - g_free(child_name); - DPRINTFN("drc realize complete"); -} - -static void unrealize(DeviceState *d, Error **errp) -{ - sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d); - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - Object *root_container; - char name[256]; - Error *err = NULL; - - DPRINTFN("drc unrealize: %x", drck->get_index(drc)); - root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); - snprintf(name, sizeof(name), "%x", drck->get_index(drc)); - object_property_del(root_container, name, &err); - if (err) { - error_report_err(err); - object_unref(OBJECT(drc)); - } -} - -sPAPRDRConnector *spapr_dr_connector_new(Object *owner, - sPAPRDRConnectorType type, - uint32_t id) -{ - sPAPRDRConnector *drc = - SPAPR_DR_CONNECTOR(object_new(TYPE_SPAPR_DR_CONNECTOR)); - char *prop_name; - - g_assert(type); - - drc->type = type; - drc->id = id; - drc->owner = owner; - prop_name = g_strdup_printf("dr-connector[%"PRIu32"]", get_index(drc)); - object_property_add_child(owner, prop_name, OBJECT(drc), NULL); - object_property_set_bool(OBJECT(drc), true, "realized", NULL); - g_free(prop_name); - - /* human-readable name for a DRC to encode into the DT - * description. this is mainly only used within a guest in place - * of the unique DRC index. - * - * in the case of VIO/PCI devices, it corresponds to a - * "location code" that maps a logical device/function (DRC index) - * to a physical (or virtual in the case of VIO) location in the - * system by chaining together the "location label" for each - * encapsulating component. - * - * since this is more to do with diagnosing physical hardware - * issues than guest compatibility, we choose location codes/DRC - * names that adhere to the documented format, but avoid encoding - * the entire topology information into the label/code, instead - * just using the location codes based on the labels for the - * endpoints (VIO/PCI adaptor connectors), which is basically - * just "C" followed by an integer ID. - * - * DRC names as documented by PAPR+ v2.7, 13.5.2.4 - * location codes as documented by PAPR+ v2.7, 12.3.1.5 - */ - switch (drc->type) { - case SPAPR_DR_CONNECTOR_TYPE_CPU: - drc->name = g_strdup_printf("CPU %d", id); - break; - case SPAPR_DR_CONNECTOR_TYPE_PHB: - drc->name = g_strdup_printf("PHB %d", id); - break; - case SPAPR_DR_CONNECTOR_TYPE_VIO: - case SPAPR_DR_CONNECTOR_TYPE_PCI: - drc->name = g_strdup_printf("C%d", id); - break; - case SPAPR_DR_CONNECTOR_TYPE_LMB: - drc->name = g_strdup_printf("LMB %d", id); - break; - default: - g_assert(false); - } - - /* PCI slot always start in a USABLE state, and stay there */ - if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) { - drc->allocation_state = SPAPR_DR_ALLOCATION_STATE_USABLE; - } - - return drc; -} - -static void spapr_dr_connector_instance_init(Object *obj) -{ - sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj); - - object_property_add_uint32_ptr(obj, "isolation-state", - &drc->isolation_state, NULL); - object_property_add_uint32_ptr(obj, "indicator-state", - &drc->indicator_state, NULL); - object_property_add_uint32_ptr(obj, "allocation-state", - &drc->allocation_state, NULL); - object_property_add_uint32_ptr(obj, "id", &drc->id, NULL); - object_property_add(obj, "index", "uint32", prop_get_index, - NULL, NULL, NULL, NULL); - object_property_add(obj, "connector_type", "uint32", prop_get_type, - NULL, NULL, NULL, NULL); - object_property_add_str(obj, "name", prop_get_name, NULL, NULL); - object_property_add(obj, "entity-sense", "uint32", prop_get_entity_sense, - NULL, NULL, NULL, NULL); - object_property_add(obj, "fdt", "struct", prop_get_fdt, - NULL, NULL, NULL, NULL); -} - -static void spapr_dr_connector_class_init(ObjectClass *k, void *data) -{ - DeviceClass *dk = DEVICE_CLASS(k); - sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_CLASS(k); - - dk->reset = reset; - dk->realize = realize; - dk->unrealize = unrealize; - drck->set_isolation_state = set_isolation_state; - drck->set_indicator_state = set_indicator_state; - drck->set_allocation_state = set_allocation_state; - drck->get_index = get_index; - drck->get_type = get_type; - drck->get_name = get_name; - drck->get_fdt = get_fdt; - drck->set_configured = set_configured; - drck->entity_sense = entity_sense; - drck->attach = attach; - drck->detach = detach; - drck->release_pending = release_pending; - drck->set_signalled = set_signalled; - /* - * Reason: it crashes FIXME find and document the real reason - */ - dk->cannot_instantiate_with_device_add_yet = true; -} - -static const TypeInfo spapr_dr_connector_info = { - .name = TYPE_SPAPR_DR_CONNECTOR, - .parent = TYPE_DEVICE, - .instance_size = sizeof(sPAPRDRConnector), - .instance_init = spapr_dr_connector_instance_init, - .class_size = sizeof(sPAPRDRConnectorClass), - .class_init = spapr_dr_connector_class_init, -}; - -static void spapr_drc_register_types(void) -{ - type_register_static(&spapr_dr_connector_info); -} - -type_init(spapr_drc_register_types) - -/* helper functions for external users */ - -sPAPRDRConnector *spapr_dr_connector_by_index(uint32_t index) -{ - Object *obj; - char name[256]; - - snprintf(name, sizeof(name), "%s/%x", DRC_CONTAINER_PATH, index); - obj = object_resolve_path(name, NULL); - - return !obj ? NULL : SPAPR_DR_CONNECTOR(obj); -} - -sPAPRDRConnector *spapr_dr_connector_by_id(sPAPRDRConnectorType type, - uint32_t id) -{ - return spapr_dr_connector_by_index( - (get_type_shift(type) << DRC_INDEX_TYPE_SHIFT) | - (id & DRC_INDEX_ID_MASK)); -} - -/* generate a string the describes the DRC to encode into the - * device tree. - * - * as documented by PAPR+ v2.7, 13.5.2.6 and C.6.1 - */ -static const char *spapr_drc_get_type_str(sPAPRDRConnectorType type) -{ - switch (type) { - case SPAPR_DR_CONNECTOR_TYPE_CPU: - return "CPU"; - case SPAPR_DR_CONNECTOR_TYPE_PHB: - return "PHB"; - case SPAPR_DR_CONNECTOR_TYPE_VIO: - return "SLOT"; - case SPAPR_DR_CONNECTOR_TYPE_PCI: - return "28"; - case SPAPR_DR_CONNECTOR_TYPE_LMB: - return "MEM"; - default: - g_assert(false); - } - - return NULL; -} - -/** - * spapr_drc_populate_dt - * - * @fdt: libfdt device tree - * @path: path in the DT to generate properties - * @owner: parent Object/DeviceState for which to generate DRC - * descriptions for - * @drc_type_mask: mask of sPAPRDRConnectorType values corresponding - * to the types of DRCs to generate entries for - * - * generate OF properties to describe DRC topology/indices to guests - * - * as documented in PAPR+ v2.1, 13.5.2 - */ -int spapr_drc_populate_dt(void *fdt, int fdt_offset, Object *owner, - uint32_t drc_type_mask) -{ - Object *root_container; - ObjectProperty *prop; - ObjectPropertyIterator iter; - uint32_t drc_count = 0; - GArray *drc_indexes, *drc_power_domains; - GString *drc_names, *drc_types; - int ret; - - /* the first entry of each properties is a 32-bit integer encoding - * the number of elements in the array. we won't know this until - * we complete the iteration through all the matching DRCs, but - * reserve the space now and set the offsets accordingly so we - * can fill them in later. - */ - drc_indexes = g_array_new(false, true, sizeof(uint32_t)); - drc_indexes = g_array_set_size(drc_indexes, 1); - drc_power_domains = g_array_new(false, true, sizeof(uint32_t)); - drc_power_domains = g_array_set_size(drc_power_domains, 1); - drc_names = g_string_set_size(g_string_new(NULL), sizeof(uint32_t)); - drc_types = g_string_set_size(g_string_new(NULL), sizeof(uint32_t)); - - /* aliases for all DRConnector objects will be rooted in QOM - * composition tree at DRC_CONTAINER_PATH - */ - root_container = container_get(object_get_root(), DRC_CONTAINER_PATH); - - object_property_iter_init(&iter, root_container); - while ((prop = object_property_iter_next(&iter))) { - Object *obj; - sPAPRDRConnector *drc; - sPAPRDRConnectorClass *drck; - uint32_t drc_index, drc_power_domain; - - if (!strstart(prop->type, "link<", NULL)) { - continue; - } - - obj = object_property_get_link(root_container, prop->name, NULL); - drc = SPAPR_DR_CONNECTOR(obj); - drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - - if (owner && (drc->owner != owner)) { - continue; - } - - if ((drc->type & drc_type_mask) == 0) { - continue; - } - - drc_count++; - - /* ibm,drc-indexes */ - drc_index = cpu_to_be32(drck->get_index(drc)); - g_array_append_val(drc_indexes, drc_index); - - /* ibm,drc-power-domains */ - drc_power_domain = cpu_to_be32(-1); - g_array_append_val(drc_power_domains, drc_power_domain); - - /* ibm,drc-names */ - drc_names = g_string_append(drc_names, drck->get_name(drc)); - drc_names = g_string_insert_len(drc_names, -1, "\0", 1); - - /* ibm,drc-types */ - drc_types = g_string_append(drc_types, - spapr_drc_get_type_str(drc->type)); - drc_types = g_string_insert_len(drc_types, -1, "\0", 1); - } - - /* now write the drc count into the space we reserved at the - * beginning of the arrays previously - */ - *(uint32_t *)drc_indexes->data = cpu_to_be32(drc_count); - *(uint32_t *)drc_power_domains->data = cpu_to_be32(drc_count); - *(uint32_t *)drc_names->str = cpu_to_be32(drc_count); - *(uint32_t *)drc_types->str = cpu_to_be32(drc_count); - - ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-indexes", - drc_indexes->data, - drc_indexes->len * sizeof(uint32_t)); - if (ret) { - fprintf(stderr, "Couldn't create ibm,drc-indexes property\n"); - goto out; - } - - ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-power-domains", - drc_power_domains->data, - drc_power_domains->len * sizeof(uint32_t)); - if (ret) { - fprintf(stderr, "Couldn't finalize ibm,drc-power-domains property\n"); - goto out; - } - - ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-names", - drc_names->str, drc_names->len); - if (ret) { - fprintf(stderr, "Couldn't finalize ibm,drc-names property\n"); - goto out; - } - - ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-types", - drc_types->str, drc_types->len); - if (ret) { - fprintf(stderr, "Couldn't finalize ibm,drc-types property\n"); - goto out; - } - -out: - g_array_free(drc_indexes, true); - g_array_free(drc_power_domains, true); - g_string_free(drc_names, true); - g_string_free(drc_types, true); - - return ret; -} |