| /* |
| * 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 */ |
| #include "trace.h" |
| |
| #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); |
| |
| trace_spapr_drc_set_isolation_state(get_index(drc), state); |
| |
| if (state == SPAPR_DR_ISOLATION_STATE_UNISOLATED) { |
| /* cannot unisolate a non-existent 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; |
| } |
| } |
| |
| /* |
| * Fail any requests to ISOLATE the LMB DRC if this LMB doesn't |
| * belong to a DIMM device that is marked for removal. |
| * |
| * Currently the guest userspace tool drmgr that drives the memory |
| * hotplug/unplug will just try to remove a set of 'removable' LMBs |
| * in response to a hot unplug request that is based on drc-count. |
| * If the LMB being removed doesn't belong to a DIMM device that is |
| * actually being unplugged, fail the isolation request here. |
| */ |
| if (drc->type == SPAPR_DR_CONNECTOR_TYPE_LMB) { |
| if ((state == SPAPR_DR_ISOLATION_STATE_ISOLATED) && |
| !drc->awaiting_release) { |
| return RTAS_OUT_HW_ERROR; |
| } |
| } |
| |
| 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) { |
| trace_spapr_drc_set_isolation_state_finalizing(get_index(drc)); |
| drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, |
| drc->detach_cb_opaque, NULL); |
| } else { |
| trace_spapr_drc_set_isolation_state_deferring(get_index(drc)); |
| } |
| } |
| drc->configured = false; |
| } |
| |
| return RTAS_OUT_SUCCESS; |
| } |
| |
| static uint32_t set_indicator_state(sPAPRDRConnector *drc, |
| sPAPRDRIndicatorState state) |
| { |
| trace_spapr_drc_set_indicator_state(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); |
| |
| trace_spapr_drc_set_allocation_state(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->awaiting_release && drc->awaiting_allocation) { |
| /* kernel is acknowledging a previous hotplug event |
| * while we are already removing it. |
| * it's safe to ignore awaiting_allocation here since we know the |
| * situation is predicated on the guest either already having done |
| * so (boot-time hotplug), or never being able to acquire in the |
| * first place (hotplug followed by immediate unplug). |
| */ |
| drc->awaiting_allocation_skippable = true; |
| 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) { |
| trace_spapr_drc_set_allocation_state_finalizing(get_index(drc)); |
| drck->detach(drc, DEVICE(drc->dev), drc->detach_cb, |
| drc->detach_cb_opaque, NULL); |
| } else if (drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_USABLE) { |
| drc->awaiting_allocation = false; |
| } |
| } |
| 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) |
| { |
| trace_spapr_drc_set_configured(get_index(drc)); |
| |
| if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_UNISOLATED) { |
| /* guest should be not configuring an isolated device */ |
| trace_spapr_drc_set_configured_skipping(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; |
| } |
| } |
| |
| trace_spapr_drc_entity_sense(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_type_null(v, NULL, errp); |
| 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_check_struct(v, &err); |
| visit_end_struct(v, NULL); |
| 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, NULL, 0, &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_check_list(v, &err); |
| visit_end_list(v, NULL); |
| if (err) { |
| error_propagate(errp, err); |
| return; |
| } |
| 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) |
| { |
| trace_spapr_drc_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; |
| |
| if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI) { |
| drc->awaiting_allocation = true; |
| } |
| |
| 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) |
| { |
| trace_spapr_drc_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) { |
| trace_spapr_drc_awaiting_isolated(get_index(drc)); |
| drc->awaiting_release = true; |
| return; |
| } |
| |
| if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI && |
| drc->allocation_state != SPAPR_DR_ALLOCATION_STATE_UNUSABLE) { |
| trace_spapr_drc_awaiting_unusable(get_index(drc)); |
| drc->awaiting_release = true; |
| return; |
| } |
| |
| if (drc->awaiting_allocation) { |
| if (!drc->awaiting_allocation_skippable) { |
| drc->awaiting_release = true; |
| trace_spapr_drc_awaiting_allocation(get_index(drc)); |
| 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; |
| drc->awaiting_allocation_skippable = 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; |
| |
| trace_spapr_drc_reset(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; |
| |
| trace_spapr_drc_realize(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)); |
| trace_spapr_drc_realize_child(drck->get_index(drc), 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); |
| trace_spapr_drc_realize_complete(drck->get_index(drc)); |
| } |
| |
| 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; |
| |
| trace_spapr_drc_unrealize(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->user_creatable = false; |
| } |
| |
| 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) { |
| error_report("Couldn't create ibm,drc-indexes property"); |
| 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) { |
| error_report("Couldn't finalize ibm,drc-power-domains property"); |
| goto out; |
| } |
| |
| ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-names", |
| drc_names->str, drc_names->len); |
| if (ret) { |
| error_report("Couldn't finalize ibm,drc-names property"); |
| goto out; |
| } |
| |
| ret = fdt_setprop(fdt, fdt_offset, "ibm,drc-types", |
| drc_types->str, drc_types->len); |
| if (ret) { |
| error_report("Couldn't finalize ibm,drc-types property"); |
| 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; |
| } |
