797 lines
26 KiB
C
797 lines
26 KiB
C
/*
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* QEMU SPAPR Dynamic Reconfiguration Connector Implementation
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*
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* Copyright IBM Corp. 2014
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*
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* Authors:
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* Michael Roth <mdroth@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "hw/ppc/spapr_drc.h"
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#include "qom/object.h"
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#include "hw/qdev.h"
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#include "qapi/visitor.h"
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#include "qemu/error-report.h"
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#include "hw/ppc/spapr.h" /* for RTAS return codes */
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/* #define DEBUG_SPAPR_DRC */
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#ifdef DEBUG_SPAPR_DRC
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
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#define DPRINTFN(fmt, ...) \
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do { DPRINTF(fmt, ## __VA_ARGS__); fprintf(stderr, "\n"); } while (0)
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0)
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#define DPRINTFN(fmt, ...) \
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do { } while (0)
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#endif
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#define DRC_CONTAINER_PATH "/dr-connector"
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#define DRC_INDEX_TYPE_SHIFT 28
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#define DRC_INDEX_ID_MASK ((1ULL << DRC_INDEX_TYPE_SHIFT) - 1)
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static sPAPRDRConnectorTypeShift get_type_shift(sPAPRDRConnectorType type)
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{
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uint32_t shift = 0;
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/* make sure this isn't SPAPR_DR_CONNECTOR_TYPE_ANY, or some
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* other wonky value.
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*/
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g_assert(is_power_of_2(type));
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while (type != (1 << shift)) {
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shift++;
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}
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return shift;
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}
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static uint32_t get_index(sPAPRDRConnector *drc)
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{
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/* no set format for a drc index: it only needs to be globally
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* unique. this is how we encode the DRC type on bare-metal
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* however, so might as well do that here
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*/
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return (get_type_shift(drc->type) << DRC_INDEX_TYPE_SHIFT) |
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(drc->id & DRC_INDEX_ID_MASK);
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}
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static uint32_t set_isolation_state(sPAPRDRConnector *drc,
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sPAPRDRIsolationState state)
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{
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sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
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DPRINTFN("drc: %x, set_isolation_state: %x", get_index(drc), state);
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if (state == SPAPR_DR_ISOLATION_STATE_UNISOLATED) {
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/* cannot unisolate a non-existant resource, and, or resources
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* which are in an 'UNUSABLE' allocation state. (PAPR 2.7, 13.5.3.5)
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*/
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if (!drc->dev ||
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drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) {
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return RTAS_OUT_NO_SUCH_INDICATOR;
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}
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}
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drc->isolation_state = state;
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if (drc->isolation_state == SPAPR_DR_ISOLATION_STATE_ISOLATED) {
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/* if we're awaiting release, but still in an unconfigured state,
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* it's likely the guest is still in the process of configuring
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* the device and is transitioning the devices to an ISOLATED
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* state as a part of that process. so we only complete the
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* removal when this transition happens for a device in a
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* configured state, as suggested by the state diagram from
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* PAPR+ 2.7, 13.4
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*/
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if (drc->awaiting_release) {
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if (drc->configured) {
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DPRINTFN("finalizing device removal");
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drck->detach(drc, DEVICE(drc->dev), drc->detach_cb,
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drc->detach_cb_opaque, NULL);
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} else {
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DPRINTFN("deferring device removal on unconfigured device\n");
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}
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}
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drc->configured = false;
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}
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return RTAS_OUT_SUCCESS;
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}
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static uint32_t set_indicator_state(sPAPRDRConnector *drc,
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sPAPRDRIndicatorState state)
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{
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DPRINTFN("drc: %x, set_indicator_state: %x", get_index(drc), state);
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drc->indicator_state = state;
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return RTAS_OUT_SUCCESS;
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}
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static uint32_t set_allocation_state(sPAPRDRConnector *drc,
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sPAPRDRAllocationState state)
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{
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sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
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DPRINTFN("drc: %x, set_allocation_state: %x", get_index(drc), state);
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if (state == SPAPR_DR_ALLOCATION_STATE_USABLE) {
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/* if there's no resource/device associated with the DRC, there's
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* no way for us to put it in an allocation state consistent with
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* being 'USABLE'. PAPR 2.7, 13.5.3.4 documents that this should
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* result in an RTAS return code of -3 / "no such indicator"
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*/
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if (!drc->dev) {
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return RTAS_OUT_NO_SUCH_INDICATOR;
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}
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}
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if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI) {
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drc->allocation_state = state;
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if (drc->awaiting_release &&
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drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) {
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DPRINTFN("finalizing device removal");
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drck->detach(drc, DEVICE(drc->dev), drc->detach_cb,
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drc->detach_cb_opaque, NULL);
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}
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}
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return RTAS_OUT_SUCCESS;
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}
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static uint32_t get_type(sPAPRDRConnector *drc)
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{
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return drc->type;
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}
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static const char *get_name(sPAPRDRConnector *drc)
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{
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return drc->name;
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}
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static const void *get_fdt(sPAPRDRConnector *drc, int *fdt_start_offset)
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{
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if (fdt_start_offset) {
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*fdt_start_offset = drc->fdt_start_offset;
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}
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return drc->fdt;
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}
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static void set_configured(sPAPRDRConnector *drc)
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{
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DPRINTFN("drc: %x, set_configured", get_index(drc));
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if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_UNISOLATED) {
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/* guest should be not configuring an isolated device */
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DPRINTFN("drc: %x, set_configured: skipping isolated device",
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get_index(drc));
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return;
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}
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drc->configured = true;
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}
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/*
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* dr-entity-sense sensor value
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* returned via get-sensor-state RTAS calls
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* as expected by state diagram in PAPR+ 2.7, 13.4
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* based on the current allocation/indicator/power states
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* for the DR connector.
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*/
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static uint32_t entity_sense(sPAPRDRConnector *drc, sPAPRDREntitySense *state)
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{
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if (drc->dev) {
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if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI &&
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drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_UNUSABLE) {
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/* for logical DR, we return a state of UNUSABLE
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* iff the allocation state UNUSABLE.
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* Otherwise, report the state as USABLE/PRESENT,
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* as we would for PCI.
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*/
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*state = SPAPR_DR_ENTITY_SENSE_UNUSABLE;
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} else {
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/* this assumes all PCI devices are assigned to
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* a 'live insertion' power domain, where QEMU
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* manages power state automatically as opposed
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* to the guest. present, non-PCI resources are
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* unaffected by power state.
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*/
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*state = SPAPR_DR_ENTITY_SENSE_PRESENT;
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}
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} else {
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if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) {
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/* PCI devices, and only PCI devices, use EMPTY
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* in cases where we'd otherwise use UNUSABLE
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*/
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*state = SPAPR_DR_ENTITY_SENSE_EMPTY;
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} else {
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*state = SPAPR_DR_ENTITY_SENSE_UNUSABLE;
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}
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}
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DPRINTFN("drc: %x, entity_sense: %x", get_index(drc), state);
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return RTAS_OUT_SUCCESS;
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}
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static void prop_get_index(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj);
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sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
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uint32_t value = (uint32_t)drck->get_index(drc);
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visit_type_uint32(v, name, &value, errp);
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}
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static void prop_get_type(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj);
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sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
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uint32_t value = (uint32_t)drck->get_type(drc);
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visit_type_uint32(v, name, &value, errp);
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}
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static char *prop_get_name(Object *obj, Error **errp)
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{
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sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj);
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sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
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return g_strdup(drck->get_name(drc));
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}
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static void prop_get_entity_sense(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj);
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sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
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uint32_t value;
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drck->entity_sense(drc, &value);
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visit_type_uint32(v, name, &value, errp);
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}
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static void prop_get_fdt(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj);
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Error *err = NULL;
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int fdt_offset_next, fdt_offset, fdt_depth;
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void *fdt;
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if (!drc->fdt) {
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visit_start_struct(v, name, NULL, 0, &err);
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if (!err) {
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visit_end_struct(v, &err);
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}
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error_propagate(errp, err);
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return;
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}
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fdt = drc->fdt;
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fdt_offset = drc->fdt_start_offset;
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fdt_depth = 0;
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do {
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const char *name = NULL;
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const struct fdt_property *prop = NULL;
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int prop_len = 0, name_len = 0;
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uint32_t tag;
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tag = fdt_next_tag(fdt, fdt_offset, &fdt_offset_next);
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switch (tag) {
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case FDT_BEGIN_NODE:
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fdt_depth++;
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name = fdt_get_name(fdt, fdt_offset, &name_len);
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visit_start_struct(v, name, NULL, 0, &err);
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if (err) {
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error_propagate(errp, err);
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return;
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}
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break;
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case FDT_END_NODE:
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/* shouldn't ever see an FDT_END_NODE before FDT_BEGIN_NODE */
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g_assert(fdt_depth > 0);
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visit_end_struct(v, &err);
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if (err) {
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error_propagate(errp, err);
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return;
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}
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fdt_depth--;
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break;
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case FDT_PROP: {
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int i;
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prop = fdt_get_property_by_offset(fdt, fdt_offset, &prop_len);
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name = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
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visit_start_list(v, name, &err);
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if (err) {
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error_propagate(errp, err);
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return;
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}
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for (i = 0; i < prop_len; i++) {
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visit_type_uint8(v, NULL, (uint8_t *)&prop->data[i], &err);
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if (err) {
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error_propagate(errp, err);
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return;
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}
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}
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visit_end_list(v);
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break;
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}
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default:
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error_setg(&error_abort, "device FDT in unexpected state: %d", tag);
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}
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fdt_offset = fdt_offset_next;
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} while (fdt_depth != 0);
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}
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static void attach(sPAPRDRConnector *drc, DeviceState *d, void *fdt,
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int fdt_start_offset, bool coldplug, Error **errp)
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{
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DPRINTFN("drc: %x, attach", get_index(drc));
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if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) {
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error_setg(errp, "an attached device is still awaiting release");
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return;
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}
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if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) {
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g_assert(drc->allocation_state == SPAPR_DR_ALLOCATION_STATE_USABLE);
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}
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g_assert(fdt || coldplug);
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/* NOTE: setting initial isolation state to UNISOLATED means we can't
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* detach unless guest has a userspace/kernel that moves this state
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* back to ISOLATED in response to an unplug event, or this is done
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* manually by the admin prior. if we force things while the guest
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* may be accessing the device, we can easily crash the guest, so we
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* we defer completion of removal in such cases to the reset() hook.
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*/
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if (drc->type == SPAPR_DR_CONNECTOR_TYPE_PCI) {
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drc->isolation_state = SPAPR_DR_ISOLATION_STATE_UNISOLATED;
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}
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drc->indicator_state = SPAPR_DR_INDICATOR_STATE_ACTIVE;
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drc->dev = d;
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drc->fdt = fdt;
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drc->fdt_start_offset = fdt_start_offset;
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drc->configured = coldplug;
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object_property_add_link(OBJECT(drc), "device",
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object_get_typename(OBJECT(drc->dev)),
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(Object **)(&drc->dev),
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NULL, 0, NULL);
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}
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static void detach(sPAPRDRConnector *drc, DeviceState *d,
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spapr_drc_detach_cb *detach_cb,
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void *detach_cb_opaque, Error **errp)
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{
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DPRINTFN("drc: %x, detach", get_index(drc));
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drc->detach_cb = detach_cb;
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drc->detach_cb_opaque = detach_cb_opaque;
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if (drc->isolation_state != SPAPR_DR_ISOLATION_STATE_ISOLATED) {
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DPRINTFN("awaiting transition to isolated state before removal");
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drc->awaiting_release = true;
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return;
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}
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if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI &&
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drc->allocation_state != SPAPR_DR_ALLOCATION_STATE_UNUSABLE) {
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DPRINTFN("awaiting transition to unusable state before removal");
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drc->awaiting_release = true;
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return;
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}
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drc->indicator_state = SPAPR_DR_INDICATOR_STATE_INACTIVE;
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if (drc->detach_cb) {
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drc->detach_cb(drc->dev, drc->detach_cb_opaque);
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}
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drc->awaiting_release = false;
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g_free(drc->fdt);
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drc->fdt = NULL;
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drc->fdt_start_offset = 0;
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object_property_del(OBJECT(drc), "device", NULL);
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drc->dev = NULL;
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drc->detach_cb = NULL;
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drc->detach_cb_opaque = NULL;
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}
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static bool release_pending(sPAPRDRConnector *drc)
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{
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return drc->awaiting_release;
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}
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static void reset(DeviceState *d)
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{
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sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d);
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sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
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DPRINTFN("drc reset: %x", drck->get_index(drc));
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/* immediately upon reset we can safely assume DRCs whose devices
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* are pending removal can be safely removed, and that they will
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* subsequently be left in an ISOLATED state. move the DRC to this
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* state in these cases (which will in turn complete any pending
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* device removals)
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*/
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if (drc->awaiting_release) {
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drck->set_isolation_state(drc, SPAPR_DR_ISOLATION_STATE_ISOLATED);
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/* generally this should also finalize the removal, but if the device
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* hasn't yet been configured we normally defer removal under the
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* assumption that this transition is taking place as part of device
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* configuration. so check if we're still waiting after this, and
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* force removal if we are
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*/
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if (drc->awaiting_release) {
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drck->detach(drc, DEVICE(drc->dev), drc->detach_cb,
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drc->detach_cb_opaque, NULL);
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}
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/* non-PCI devices may be awaiting a transition to UNUSABLE */
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if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI &&
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drc->awaiting_release) {
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drck->set_allocation_state(drc, SPAPR_DR_ALLOCATION_STATE_UNUSABLE);
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}
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}
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}
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static void realize(DeviceState *d, Error **errp)
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{
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sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(d);
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sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
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Object *root_container;
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char link_name[256];
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gchar *child_name;
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Error *err = NULL;
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DPRINTFN("drc realize: %x", drck->get_index(drc));
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/* NOTE: we do this as part of realize/unrealize due to the fact
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* that the guest will communicate with the DRC via RTAS calls
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* referencing the global DRC index. By unlinking the DRC
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* from DRC_CONTAINER_PATH/<drc_index> we effectively make it
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* inaccessible by the guest, since lookups rely on this path
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* existing in the composition tree
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*/
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root_container = container_get(object_get_root(), DRC_CONTAINER_PATH);
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snprintf(link_name, sizeof(link_name), "%x", drck->get_index(drc));
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child_name = object_get_canonical_path_component(OBJECT(drc));
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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;
|
|
/*
|
|
* 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;
|
|
}
|