diff options
| -rw-r--r-- | hw/ppc/spapr_drc.c | 156 | ||||
| -rw-r--r-- | include/hw/ppc/spapr_drc.h | 2 |
2 files changed, 158 insertions, 0 deletions
diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c index 047c6c7393..ef985381cb 100644 --- a/hw/ppc/spapr_drc.c +++ b/hw/ppc/spapr_drc.c @@ -586,3 +586,159 @@ sPAPRDRConnector *spapr_dr_connector_by_id(sPAPRDRConnectorType type, (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; + 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); + + QTAILQ_FOREACH(prop, &root_container->properties, node) { + 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; +} diff --git a/include/hw/ppc/spapr_drc.h b/include/hw/ppc/spapr_drc.h index 34fdef97e5..60cda35ed2 100644 --- a/include/hw/ppc/spapr_drc.h +++ b/include/hw/ppc/spapr_drc.h @@ -195,5 +195,7 @@ sPAPRDRConnector *spapr_dr_connector_new(Object *owner, sPAPRDRConnector *spapr_dr_connector_by_index(uint32_t index); sPAPRDRConnector *spapr_dr_connector_by_id(sPAPRDRConnectorType type, uint32_t id); +int spapr_drc_populate_dt(void *fdt, int fdt_offset, Object *owner, + uint32_t drc_type_mask); #endif /* __HW_SPAPR_DRC_H__ */ |