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qemu-e2k/hw/ppc/spapr_drc.c
Daniel Henrique Barboza eb7f80fd26 spapr.c: send QAPI event when memory hotunplug fails 
Recent changes allowed the pSeries machine to rollback the hotunplug
process for the DIMM when the guest kernel signals, via a
reconfiguration of the DR connector, that it's not going to release the
LMBs.

Let's also warn QAPI listerners about it. One place to do it would be
right after the unplug state is cleaned up,
spapr_clear_pending_dimm_unplug_state(). This would mean that the
function is now doing more than cleaning up the pending dimm state
though.

This patch does the following changes in spapr.c:

- send a QAPI event to inform that we experienced a failure in the
  hotunplug of the DIMM;

- rename spapr_clear_pending_dimm_unplug_state() to
  spapr_memory_unplug_rollback(). This is a better fit for what the
  function is now doing, and it makes callers care more about what the
  function goal is and less about spapr.c internals such as clearing
  the pending dimm unplug state.

Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20210302141019.153729-3-danielhb413@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2021-03-10 09:07:09 +11:00

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/*
* 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 "qapi/qmp/qnull.h"
#include "cpu.h"
#include "qemu/cutils.h"
#include "hw/ppc/spapr_drc.h"
#include "qom/object.h"
#include "migration/vmstate.h"
#include "qapi/visitor.h"
#include "qemu/error-report.h"
#include "hw/ppc/spapr.h" /* for RTAS return codes */
#include "hw/pci-host/spapr.h" /* spapr_phb_remove_pci_device_cb callback */
#include "hw/ppc/spapr_nvdimm.h"
#include "sysemu/device_tree.h"
#include "sysemu/reset.h"
#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)
SpaprDrcType spapr_drc_type(SpaprDrc *drc)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
return 1 << drck->typeshift;
}
uint32_t spapr_drc_index(SpaprDrc *drc)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(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 (drck->typeshift << DRC_INDEX_TYPE_SHIFT)
| (drc->id & DRC_INDEX_ID_MASK);
}
static void spapr_drc_release(SpaprDrc *drc)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
drck->release(drc->dev);
drc->unplug_requested = false;
timer_del(drc->unplug_timeout_timer);
g_free(drc->fdt);
drc->fdt = NULL;
drc->fdt_start_offset = 0;
object_property_del(OBJECT(drc), "device");
drc->dev = NULL;
}
static uint32_t drc_isolate_physical(SpaprDrc *drc)
{
switch (drc->state) {
case SPAPR_DRC_STATE_PHYSICAL_POWERON:
return RTAS_OUT_SUCCESS; /* Nothing to do */
case SPAPR_DRC_STATE_PHYSICAL_CONFIGURED:
break; /* see below */
case SPAPR_DRC_STATE_PHYSICAL_UNISOLATE:
return RTAS_OUT_PARAM_ERROR; /* not allowed */
default:
g_assert_not_reached();
}
drc->state = SPAPR_DRC_STATE_PHYSICAL_POWERON;
if (drc->unplug_requested) {
uint32_t drc_index = spapr_drc_index(drc);
trace_spapr_drc_set_isolation_state_finalizing(drc_index);
spapr_drc_release(drc);
}
return RTAS_OUT_SUCCESS;
}
static uint32_t drc_unisolate_physical(SpaprDrc *drc)
{
switch (drc->state) {
case SPAPR_DRC_STATE_PHYSICAL_UNISOLATE:
case SPAPR_DRC_STATE_PHYSICAL_CONFIGURED:
return RTAS_OUT_SUCCESS; /* Nothing to do */
case SPAPR_DRC_STATE_PHYSICAL_POWERON:
break; /* see below */
default:
g_assert_not_reached();
}
/* 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) {
return RTAS_OUT_NO_SUCH_INDICATOR;
}
drc->state = SPAPR_DRC_STATE_PHYSICAL_UNISOLATE;
drc->ccs_offset = drc->fdt_start_offset;
drc->ccs_depth = 0;
return RTAS_OUT_SUCCESS;
}
static uint32_t drc_isolate_logical(SpaprDrc *drc)
{
switch (drc->state) {
case SPAPR_DRC_STATE_LOGICAL_AVAILABLE:
case SPAPR_DRC_STATE_LOGICAL_UNUSABLE:
return RTAS_OUT_SUCCESS; /* Nothing to do */
case SPAPR_DRC_STATE_LOGICAL_CONFIGURED:
break; /* see below */
case SPAPR_DRC_STATE_LOGICAL_UNISOLATE:
return RTAS_OUT_PARAM_ERROR; /* not allowed */
default:
g_assert_not_reached();
}
/*
* 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 (spapr_drc_type(drc) == SPAPR_DR_CONNECTOR_TYPE_LMB
&& !drc->unplug_requested) {
return RTAS_OUT_HW_ERROR;
}
drc->state = SPAPR_DRC_STATE_LOGICAL_AVAILABLE;
return RTAS_OUT_SUCCESS;
}
static uint32_t drc_unisolate_logical(SpaprDrc *drc)
{
switch (drc->state) {
case SPAPR_DRC_STATE_LOGICAL_UNISOLATE:
case SPAPR_DRC_STATE_LOGICAL_CONFIGURED:
return RTAS_OUT_SUCCESS; /* Nothing to do */
case SPAPR_DRC_STATE_LOGICAL_AVAILABLE:
break; /* see below */
case SPAPR_DRC_STATE_LOGICAL_UNUSABLE:
return RTAS_OUT_NO_SUCH_INDICATOR; /* not allowed */
default:
g_assert_not_reached();
}
/* Move to AVAILABLE state should have ensured device was present */
g_assert(drc->dev);
drc->state = SPAPR_DRC_STATE_LOGICAL_UNISOLATE;
drc->ccs_offset = drc->fdt_start_offset;
drc->ccs_depth = 0;
return RTAS_OUT_SUCCESS;
}
static uint32_t drc_set_usable(SpaprDrc *drc)
{
switch (drc->state) {
case SPAPR_DRC_STATE_LOGICAL_AVAILABLE:
case SPAPR_DRC_STATE_LOGICAL_UNISOLATE:
case SPAPR_DRC_STATE_LOGICAL_CONFIGURED:
return RTAS_OUT_SUCCESS; /* Nothing to do */
case SPAPR_DRC_STATE_LOGICAL_UNUSABLE:
break; /* see below */
default:
g_assert_not_reached();
}
/* 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->unplug_requested) {
/* Don't allow the guest to move a device away from UNUSABLE
* state when we want to unplug it */
return RTAS_OUT_NO_SUCH_INDICATOR;
}
drc->state = SPAPR_DRC_STATE_LOGICAL_AVAILABLE;
return RTAS_OUT_SUCCESS;
}
static uint32_t drc_set_unusable(SpaprDrc *drc)
{
switch (drc->state) {
case SPAPR_DRC_STATE_LOGICAL_UNUSABLE:
return RTAS_OUT_SUCCESS; /* Nothing to do */
case SPAPR_DRC_STATE_LOGICAL_AVAILABLE:
break; /* see below */
case SPAPR_DRC_STATE_LOGICAL_UNISOLATE:
case SPAPR_DRC_STATE_LOGICAL_CONFIGURED:
return RTAS_OUT_NO_SUCH_INDICATOR; /* not allowed */
default:
g_assert_not_reached();
}
drc->state = SPAPR_DRC_STATE_LOGICAL_UNUSABLE;
if (drc->unplug_requested) {
uint32_t drc_index = spapr_drc_index(drc);
trace_spapr_drc_set_allocation_state_finalizing(drc_index);
spapr_drc_release(drc);
}
return RTAS_OUT_SUCCESS;
}
static char *spapr_drc_name(SpaprDrc *drc)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
/* 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
*/
return g_strdup_printf("%s%d", drck->drc_name_prefix, drc->id);
}
/*
* 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 SpaprDREntitySense physical_entity_sense(SpaprDrc *drc)
{
/* 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.
*/
return drc->dev ? SPAPR_DR_ENTITY_SENSE_PRESENT
: SPAPR_DR_ENTITY_SENSE_EMPTY;
}
static SpaprDREntitySense logical_entity_sense(SpaprDrc *drc)
{
switch (drc->state) {
case SPAPR_DRC_STATE_LOGICAL_UNUSABLE:
return SPAPR_DR_ENTITY_SENSE_UNUSABLE;
case SPAPR_DRC_STATE_LOGICAL_AVAILABLE:
case SPAPR_DRC_STATE_LOGICAL_UNISOLATE:
case SPAPR_DRC_STATE_LOGICAL_CONFIGURED:
g_assert(drc->dev);
return SPAPR_DR_ENTITY_SENSE_PRESENT;
default:
g_assert_not_reached();
}
}
static void prop_get_index(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
SpaprDrc *drc = SPAPR_DR_CONNECTOR(obj);
uint32_t value = spapr_drc_index(drc);
visit_type_uint32(v, name, &value, errp);
}
static void prop_get_fdt(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
SpaprDrc *drc = SPAPR_DR_CONNECTOR(obj);
QNull *null = NULL;
int fdt_offset_next, fdt_offset, fdt_depth;
void *fdt;
if (!drc->fdt) {
visit_type_null(v, NULL, &null, errp);
qobject_unref(null);
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;
bool ok;
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);
if (!visit_start_struct(v, name, NULL, 0, errp)) {
return;
}
break;
case FDT_END_NODE:
/* shouldn't ever see an FDT_END_NODE before FDT_BEGIN_NODE */
g_assert(fdt_depth > 0);
ok = visit_check_struct(v, errp);
visit_end_struct(v, NULL);
if (!ok) {
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));
if (!visit_start_list(v, name, NULL, 0, errp)) {
return;
}
for (i = 0; i < prop_len; i++) {
if (!visit_type_uint8(v, NULL, (uint8_t *)&prop->data[i],
errp)) {
return;
}
}
ok = visit_check_list(v, errp);
visit_end_list(v, NULL);
if (!ok) {
return;
}
break;
}
default:
error_report("device FDT in unexpected state: %d", tag);
abort();
}
fdt_offset = fdt_offset_next;
} while (fdt_depth != 0);
}
static void spapr_drc_start_unplug_timeout_timer(SpaprDrc *drc)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
if (drck->unplug_timeout_seconds != 0) {
timer_mod(drc->unplug_timeout_timer,
qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
drck->unplug_timeout_seconds * 1000);
}
}
void spapr_drc_attach(SpaprDrc *drc, DeviceState *d)
{
trace_spapr_drc_attach(spapr_drc_index(drc));
g_assert(!drc->dev);
g_assert((drc->state == SPAPR_DRC_STATE_LOGICAL_UNUSABLE)
|| (drc->state == SPAPR_DRC_STATE_PHYSICAL_POWERON));
drc->dev = d;
object_property_add_link(OBJECT(drc), "device",
object_get_typename(OBJECT(drc->dev)),
(Object **)(&drc->dev),
NULL, 0);
}
void spapr_drc_unplug_request(SpaprDrc *drc)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
trace_spapr_drc_unplug_request(spapr_drc_index(drc));
g_assert(drc->dev);
drc->unplug_requested = true;
spapr_drc_start_unplug_timeout_timer(drc);
if (drc->state != drck->empty_state) {
trace_spapr_drc_awaiting_quiesce(spapr_drc_index(drc));
return;
}
spapr_drc_release(drc);
}
int spapr_drc_unplug_timeout_remaining_sec(SpaprDrc *drc)
{
if (drc->unplug_requested) {
return timer_deadline_ms(drc->unplug_timeout_timer) / 1000;
}
return 0;
}
bool spapr_drc_reset(SpaprDrc *drc)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
bool unplug_completed = false;
trace_spapr_drc_reset(spapr_drc_index(drc));
/* immediately upon reset we can safely assume DRCs whose devices
* are pending removal can be safely removed.
*/
if (drc->unplug_requested) {
spapr_drc_release(drc);
unplug_completed = true;
}
if (drc->dev) {
/* A device present at reset is ready to go, same as coldplugged */
drc->state = drck->ready_state;
/*
* Ensure that we are able to send the FDT fragment again
* via configure-connector call if the guest requests.
*/
drc->ccs_offset = drc->fdt_start_offset;
drc->ccs_depth = 0;
} else {
drc->state = drck->empty_state;
drc->ccs_offset = -1;
drc->ccs_depth = -1;
}
return unplug_completed;
}
static bool spapr_drc_unplug_requested_needed(void *opaque)
{
return spapr_drc_unplug_requested(opaque);
}
static const VMStateDescription vmstate_spapr_drc_unplug_requested = {
.name = "spapr_drc/unplug_requested",
.version_id = 1,
.minimum_version_id = 1,
.needed = spapr_drc_unplug_requested_needed,
.fields = (VMStateField []) {
VMSTATE_BOOL(unplug_requested, SpaprDrc),
VMSTATE_END_OF_LIST()
}
};
static bool spapr_drc_needed(void *opaque)
{
SpaprDrc *drc = opaque;
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
/*
* If no dev is plugged in there is no need to migrate the DRC state
* nor to reset the DRC at CAS.
*/
if (!drc->dev) {
return false;
}
/*
* We need to reset the DRC at CAS or to migrate the DRC state if it's
* not equal to the expected long-term state, which is the same as the
* coldplugged initial state, or if an unplug request is pending.
*/
return drc->state != drck->ready_state ||
spapr_drc_unplug_requested(drc);
}
static int spapr_drc_post_load(void *opaque, int version_id)
{
SpaprDrc *drc = opaque;
if (drc->unplug_requested) {
spapr_drc_start_unplug_timeout_timer(drc);
}
return 0;
}
static const VMStateDescription vmstate_spapr_drc = {
.name = "spapr_drc",
.version_id = 1,
.minimum_version_id = 1,
.needed = spapr_drc_needed,
.post_load = spapr_drc_post_load,
.fields = (VMStateField []) {
VMSTATE_UINT32(state, SpaprDrc),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * []) {
&vmstate_spapr_drc_unplug_requested,
NULL
}
};
static void drc_unplug_timeout_cb(void *opaque)
{
SpaprDrc *drc = opaque;
if (drc->unplug_requested) {
drc->unplug_requested = false;
}
}
static void drc_realize(DeviceState *d, Error **errp)
{
SpaprDrc *drc = SPAPR_DR_CONNECTOR(d);
Object *root_container;
gchar *link_name;
const char *child_name;
trace_spapr_drc_realize(spapr_drc_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);
link_name = g_strdup_printf("%x", spapr_drc_index(drc));
child_name = object_get_canonical_path_component(OBJECT(drc));
trace_spapr_drc_realize_child(spapr_drc_index(drc), child_name);
object_property_add_alias(root_container, link_name,
drc->owner, child_name);
g_free(link_name);
drc->unplug_timeout_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
drc_unplug_timeout_cb,
drc);
vmstate_register(VMSTATE_IF(drc), spapr_drc_index(drc), &vmstate_spapr_drc,
drc);
trace_spapr_drc_realize_complete(spapr_drc_index(drc));
}
static void drc_unrealize(DeviceState *d)
{
SpaprDrc *drc = SPAPR_DR_CONNECTOR(d);
Object *root_container;
gchar *name;
trace_spapr_drc_unrealize(spapr_drc_index(drc));
vmstate_unregister(VMSTATE_IF(drc), &vmstate_spapr_drc, drc);
root_container = container_get(object_get_root(), DRC_CONTAINER_PATH);
name = g_strdup_printf("%x", spapr_drc_index(drc));
object_property_del(root_container, name);
g_free(name);
timer_free(drc->unplug_timeout_timer);
}
SpaprDrc *spapr_dr_connector_new(Object *owner, const char *type,
uint32_t id)
{
SpaprDrc *drc = SPAPR_DR_CONNECTOR(object_new(type));
char *prop_name;
drc->id = id;
drc->owner = owner;
prop_name = g_strdup_printf("dr-connector[%"PRIu32"]",
spapr_drc_index(drc));
object_property_add_child(owner, prop_name, OBJECT(drc));
object_unref(OBJECT(drc));
qdev_realize(DEVICE(drc), NULL, NULL);
g_free(prop_name);
return drc;
}
static void spapr_dr_connector_instance_init(Object *obj)
{
SpaprDrc *drc = SPAPR_DR_CONNECTOR(obj);
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
object_property_add_uint32_ptr(obj, "id", &drc->id, OBJ_PROP_FLAG_READ);
object_property_add(obj, "index", "uint32", prop_get_index,
NULL, NULL, NULL);
object_property_add(obj, "fdt", "struct", prop_get_fdt,
NULL, NULL, NULL);
drc->state = drck->empty_state;
}
static void spapr_dr_connector_class_init(ObjectClass *k, void *data)
{
DeviceClass *dk = DEVICE_CLASS(k);
dk->realize = drc_realize;
dk->unrealize = drc_unrealize;
/*
* Reason: DR connector needs to be wired to either the machine or to a
* PHB in spapr_dr_connector_new().
*/
dk->user_creatable = false;
}
static bool drc_physical_needed(void *opaque)
{
SpaprDrcPhysical *drcp = (SpaprDrcPhysical *)opaque;
SpaprDrc *drc = SPAPR_DR_CONNECTOR(drcp);
if ((drc->dev && (drcp->dr_indicator == SPAPR_DR_INDICATOR_ACTIVE))
|| (!drc->dev && (drcp->dr_indicator == SPAPR_DR_INDICATOR_INACTIVE))) {
return false;
}
return true;
}
static const VMStateDescription vmstate_spapr_drc_physical = {
.name = "spapr_drc/physical",
.version_id = 1,
.minimum_version_id = 1,
.needed = drc_physical_needed,
.fields = (VMStateField []) {
VMSTATE_UINT32(dr_indicator, SpaprDrcPhysical),
VMSTATE_END_OF_LIST()
}
};
static void drc_physical_reset(void *opaque)
{
SpaprDrc *drc = SPAPR_DR_CONNECTOR(opaque);
SpaprDrcPhysical *drcp = SPAPR_DRC_PHYSICAL(drc);
if (drc->dev) {
drcp->dr_indicator = SPAPR_DR_INDICATOR_ACTIVE;
} else {
drcp->dr_indicator = SPAPR_DR_INDICATOR_INACTIVE;
}
}
static void realize_physical(DeviceState *d, Error **errp)
{
SpaprDrcPhysical *drcp = SPAPR_DRC_PHYSICAL(d);
Error *local_err = NULL;
drc_realize(d, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
vmstate_register(VMSTATE_IF(drcp),
spapr_drc_index(SPAPR_DR_CONNECTOR(drcp)),
&vmstate_spapr_drc_physical, drcp);
qemu_register_reset(drc_physical_reset, drcp);
}
static void unrealize_physical(DeviceState *d)
{
SpaprDrcPhysical *drcp = SPAPR_DRC_PHYSICAL(d);
drc_unrealize(d);
vmstate_unregister(VMSTATE_IF(drcp), &vmstate_spapr_drc_physical, drcp);
qemu_unregister_reset(drc_physical_reset, drcp);
}
static void spapr_drc_physical_class_init(ObjectClass *k, void *data)
{
DeviceClass *dk = DEVICE_CLASS(k);
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
dk->realize = realize_physical;
dk->unrealize = unrealize_physical;
drck->dr_entity_sense = physical_entity_sense;
drck->isolate = drc_isolate_physical;
drck->unisolate = drc_unisolate_physical;
drck->ready_state = SPAPR_DRC_STATE_PHYSICAL_CONFIGURED;
drck->empty_state = SPAPR_DRC_STATE_PHYSICAL_POWERON;
}
static void spapr_drc_logical_class_init(ObjectClass *k, void *data)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
drck->dr_entity_sense = logical_entity_sense;
drck->isolate = drc_isolate_logical;
drck->unisolate = drc_unisolate_logical;
drck->ready_state = SPAPR_DRC_STATE_LOGICAL_CONFIGURED;
drck->empty_state = SPAPR_DRC_STATE_LOGICAL_UNUSABLE;
}
static void spapr_drc_cpu_class_init(ObjectClass *k, void *data)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
drck->typeshift = SPAPR_DR_CONNECTOR_TYPE_SHIFT_CPU;
drck->typename = "CPU";
drck->drc_name_prefix = "CPU ";
drck->release = spapr_core_release;
drck->dt_populate = spapr_core_dt_populate;
drck->unplug_timeout_seconds = 15;
}
static void spapr_drc_pci_class_init(ObjectClass *k, void *data)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
drck->typeshift = SPAPR_DR_CONNECTOR_TYPE_SHIFT_PCI;
drck->typename = "28";
drck->drc_name_prefix = "C";
drck->release = spapr_phb_remove_pci_device_cb;
drck->dt_populate = spapr_pci_dt_populate;
}
static void spapr_drc_lmb_class_init(ObjectClass *k, void *data)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
drck->typeshift = SPAPR_DR_CONNECTOR_TYPE_SHIFT_LMB;
drck->typename = "MEM";
drck->drc_name_prefix = "LMB ";
drck->release = spapr_lmb_release;
drck->dt_populate = spapr_lmb_dt_populate;
}
static void spapr_drc_phb_class_init(ObjectClass *k, void *data)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
drck->typeshift = SPAPR_DR_CONNECTOR_TYPE_SHIFT_PHB;
drck->typename = "PHB";
drck->drc_name_prefix = "PHB ";
drck->release = spapr_phb_release;
drck->dt_populate = spapr_phb_dt_populate;
}
static void spapr_drc_pmem_class_init(ObjectClass *k, void *data)
{
SpaprDrcClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
drck->typeshift = SPAPR_DR_CONNECTOR_TYPE_SHIFT_PMEM;
drck->typename = "PMEM";
drck->drc_name_prefix = "PMEM ";
drck->release = NULL;
drck->dt_populate = spapr_pmem_dt_populate;
}
static const TypeInfo spapr_dr_connector_info = {
.name = TYPE_SPAPR_DR_CONNECTOR,
.parent = TYPE_DEVICE,
.instance_size = sizeof(SpaprDrc),
.instance_init = spapr_dr_connector_instance_init,
.class_size = sizeof(SpaprDrcClass),
.class_init = spapr_dr_connector_class_init,
.abstract = true,
};
static const TypeInfo spapr_drc_physical_info = {
.name = TYPE_SPAPR_DRC_PHYSICAL,
.parent = TYPE_SPAPR_DR_CONNECTOR,
.instance_size = sizeof(SpaprDrcPhysical),
.class_init = spapr_drc_physical_class_init,
.abstract = true,
};
static const TypeInfo spapr_drc_logical_info = {
.name = TYPE_SPAPR_DRC_LOGICAL,
.parent = TYPE_SPAPR_DR_CONNECTOR,
.class_init = spapr_drc_logical_class_init,
.abstract = true,
};
static const TypeInfo spapr_drc_cpu_info = {
.name = TYPE_SPAPR_DRC_CPU,
.parent = TYPE_SPAPR_DRC_LOGICAL,
.class_init = spapr_drc_cpu_class_init,
};
static const TypeInfo spapr_drc_pci_info = {
.name = TYPE_SPAPR_DRC_PCI,
.parent = TYPE_SPAPR_DRC_PHYSICAL,
.class_init = spapr_drc_pci_class_init,
};
static const TypeInfo spapr_drc_lmb_info = {
.name = TYPE_SPAPR_DRC_LMB,
.parent = TYPE_SPAPR_DRC_LOGICAL,
.class_init = spapr_drc_lmb_class_init,
};
static const TypeInfo spapr_drc_phb_info = {
.name = TYPE_SPAPR_DRC_PHB,
.parent = TYPE_SPAPR_DRC_LOGICAL,
.instance_size = sizeof(SpaprDrc),
.class_init = spapr_drc_phb_class_init,
};
static const TypeInfo spapr_drc_pmem_info = {
.name = TYPE_SPAPR_DRC_PMEM,
.parent = TYPE_SPAPR_DRC_LOGICAL,
.class_init = spapr_drc_pmem_class_init,
};
/* helper functions for external users */
SpaprDrc *spapr_drc_by_index(uint32_t index)
{
Object *obj;
gchar *name;
name = g_strdup_printf("%s/%x", DRC_CONTAINER_PATH, index);
obj = object_resolve_path(name, NULL);
g_free(name);
return !obj ? NULL : SPAPR_DR_CONNECTOR(obj);
}
SpaprDrc *spapr_drc_by_id(const char *type, uint32_t id)
{
SpaprDrcClass *drck
= SPAPR_DR_CONNECTOR_CLASS(object_class_by_name(type));
return spapr_drc_by_index(drck->typeshift << DRC_INDEX_TYPE_SHIFT
| (id & DRC_INDEX_ID_MASK));
}
/**
* spapr_dt_drc
*
* @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 SpaprDrcType 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_dt_drc(void *fdt, int 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;
/*
* This should really be only called once per node since it overwrites
* the OF properties if they already exist.
*/
g_assert(!fdt_get_property(fdt, offset, "ibm,drc-indexes", NULL));
/* 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;
SpaprDrc *drc;
SpaprDrcClass *drck;
char *drc_name = NULL;
uint32_t drc_index, drc_power_domain;
if (!strstart(prop->type, "link<", NULL)) {
continue;
}
obj = object_property_get_link(root_container, prop->name,
&error_abort);
drc = SPAPR_DR_CONNECTOR(obj);
drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
if (owner && (drc->owner != owner)) {
continue;
}
if ((spapr_drc_type(drc) & drc_type_mask) == 0) {
continue;
}
drc_count++;
/* ibm,drc-indexes */
drc_index = cpu_to_be32(spapr_drc_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_name = spapr_drc_name(drc);
drc_names = g_string_append(drc_names, drc_name);
drc_names = g_string_insert_len(drc_names, -1, "\0", 1);
g_free(drc_name);
/* ibm,drc-types */
drc_types = g_string_append(drc_types, drck->typename);
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, 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, 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, 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, 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;
}
void spapr_drc_reset_all(SpaprMachineState *spapr)
{
Object *drc_container;
ObjectProperty *prop;
ObjectPropertyIterator iter;
drc_container = container_get(object_get_root(), DRC_CONTAINER_PATH);
restart:
object_property_iter_init(&iter, drc_container);
while ((prop = object_property_iter_next(&iter))) {
SpaprDrc *drc;
if (!strstart(prop->type, "link<", NULL)) {
continue;
}
drc = SPAPR_DR_CONNECTOR(object_property_get_link(drc_container,
prop->name,
&error_abort));
/*
* This will complete any pending plug/unplug requests.
* In case of a unplugged PHB or PCI bridge, this will
* cause some DRCs to be destroyed and thus potentially
* invalidate the iterator.
*/
if (spapr_drc_reset(drc)) {
goto restart;
}
}
}
/*
* RTAS calls
*/
static uint32_t rtas_set_isolation_state(uint32_t idx, uint32_t state)
{
SpaprDrc *drc = spapr_drc_by_index(idx);
SpaprDrcClass *drck;
if (!drc) {
return RTAS_OUT_NO_SUCH_INDICATOR;
}
trace_spapr_drc_set_isolation_state(spapr_drc_index(drc), state);
drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
switch (state) {
case SPAPR_DR_ISOLATION_STATE_ISOLATED:
return drck->isolate(drc);
case SPAPR_DR_ISOLATION_STATE_UNISOLATED:
return drck->unisolate(drc);
default:
return RTAS_OUT_PARAM_ERROR;
}
}
static uint32_t rtas_set_allocation_state(uint32_t idx, uint32_t state)
{
SpaprDrc *drc = spapr_drc_by_index(idx);
if (!drc || !object_dynamic_cast(OBJECT(drc), TYPE_SPAPR_DRC_LOGICAL)) {
return RTAS_OUT_NO_SUCH_INDICATOR;
}
trace_spapr_drc_set_allocation_state(spapr_drc_index(drc), state);
switch (state) {
case SPAPR_DR_ALLOCATION_STATE_USABLE:
return drc_set_usable(drc);
case SPAPR_DR_ALLOCATION_STATE_UNUSABLE:
return drc_set_unusable(drc);
default:
return RTAS_OUT_PARAM_ERROR;
}
}
static uint32_t rtas_set_dr_indicator(uint32_t idx, uint32_t state)
{
SpaprDrc *drc = spapr_drc_by_index(idx);
if (!drc || !object_dynamic_cast(OBJECT(drc), TYPE_SPAPR_DRC_PHYSICAL)) {
return RTAS_OUT_NO_SUCH_INDICATOR;
}
if ((state != SPAPR_DR_INDICATOR_INACTIVE)
&& (state != SPAPR_DR_INDICATOR_ACTIVE)
&& (state != SPAPR_DR_INDICATOR_IDENTIFY)
&& (state != SPAPR_DR_INDICATOR_ACTION)) {
return RTAS_OUT_PARAM_ERROR; /* bad state parameter */
}
trace_spapr_drc_set_dr_indicator(idx, state);
SPAPR_DRC_PHYSICAL(drc)->dr_indicator = state;
return RTAS_OUT_SUCCESS;
}
static void rtas_set_indicator(PowerPCCPU *cpu, SpaprMachineState *spapr,
uint32_t token,
uint32_t nargs, target_ulong args,
uint32_t nret, target_ulong rets)
{
uint32_t type, idx, state;
uint32_t ret = RTAS_OUT_SUCCESS;
if (nargs != 3 || nret != 1) {
ret = RTAS_OUT_PARAM_ERROR;
goto out;
}
type = rtas_ld(args, 0);
idx = rtas_ld(args, 1);
state = rtas_ld(args, 2);
switch (type) {
case RTAS_SENSOR_TYPE_ISOLATION_STATE:
ret = rtas_set_isolation_state(idx, state);
break;
case RTAS_SENSOR_TYPE_DR:
ret = rtas_set_dr_indicator(idx, state);
break;
case RTAS_SENSOR_TYPE_ALLOCATION_STATE:
ret = rtas_set_allocation_state(idx, state);
break;
default:
ret = RTAS_OUT_NOT_SUPPORTED;
}
out:
rtas_st(rets, 0, ret);
}
static void rtas_get_sensor_state(PowerPCCPU *cpu, SpaprMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
uint32_t sensor_type;
uint32_t sensor_index;
uint32_t sensor_state = 0;
SpaprDrc *drc;
SpaprDrcClass *drck;
uint32_t ret = RTAS_OUT_SUCCESS;
if (nargs != 2 || nret != 2) {
ret = RTAS_OUT_PARAM_ERROR;
goto out;
}
sensor_type = rtas_ld(args, 0);
sensor_index = rtas_ld(args, 1);
if (sensor_type != RTAS_SENSOR_TYPE_ENTITY_SENSE) {
/* currently only DR-related sensors are implemented */
trace_spapr_rtas_get_sensor_state_not_supported(sensor_index,
sensor_type);
ret = RTAS_OUT_NOT_SUPPORTED;
goto out;
}
drc = spapr_drc_by_index(sensor_index);
if (!drc) {
trace_spapr_rtas_get_sensor_state_invalid(sensor_index);
ret = RTAS_OUT_PARAM_ERROR;
goto out;
}
drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
sensor_state = drck->dr_entity_sense(drc);
out:
rtas_st(rets, 0, ret);
rtas_st(rets, 1, sensor_state);
}
/* configure-connector work area offsets, int32_t units for field
* indexes, bytes for field offset/len values.
*
* as documented by PAPR+ v2.7, 13.5.3.5
*/
#define CC_IDX_NODE_NAME_OFFSET 2
#define CC_IDX_PROP_NAME_OFFSET 2
#define CC_IDX_PROP_LEN 3
#define CC_IDX_PROP_DATA_OFFSET 4
#define CC_VAL_DATA_OFFSET ((CC_IDX_PROP_DATA_OFFSET + 1) * 4)
#define CC_WA_LEN 4096
static void configure_connector_st(target_ulong addr, target_ulong offset,
const void *buf, size_t len)
{
cpu_physical_memory_write(ppc64_phys_to_real(addr + offset),
buf, MIN(len, CC_WA_LEN - offset));
}
static void rtas_ibm_configure_connector(PowerPCCPU *cpu,
SpaprMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
uint64_t wa_addr;
uint64_t wa_offset;
uint32_t drc_index;
SpaprDrc *drc;
SpaprDrcClass *drck;
SpaprDRCCResponse resp = SPAPR_DR_CC_RESPONSE_CONTINUE;
int rc;
if (nargs != 2 || nret != 1) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
wa_addr = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 0);
drc_index = rtas_ld(wa_addr, 0);
drc = spapr_drc_by_index(drc_index);
if (!drc) {
trace_spapr_rtas_ibm_configure_connector_invalid(drc_index);
rc = RTAS_OUT_PARAM_ERROR;
goto out;
}
if ((drc->state != SPAPR_DRC_STATE_LOGICAL_UNISOLATE)
&& (drc->state != SPAPR_DRC_STATE_PHYSICAL_UNISOLATE)
&& (drc->state != SPAPR_DRC_STATE_LOGICAL_CONFIGURED)
&& (drc->state != SPAPR_DRC_STATE_PHYSICAL_CONFIGURED)) {
/*
* Need to unisolate the device before configuring
* or it should already be in configured state to
* allow configure-connector be called repeatedly.
*/
rc = SPAPR_DR_CC_RESPONSE_NOT_CONFIGURABLE;
goto out;
}
drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
/*
* This indicates that the kernel is reconfiguring a LMB due to
* a failed hotunplug. Rollback the DIMM unplug process.
*/
if (spapr_drc_type(drc) == SPAPR_DR_CONNECTOR_TYPE_LMB &&
drc->unplug_requested) {
spapr_memory_unplug_rollback(spapr, drc->dev);
}
if (!drc->fdt) {
void *fdt;
int fdt_size;
fdt = create_device_tree(&fdt_size);
if (drck->dt_populate(drc, spapr, fdt, &drc->fdt_start_offset,
NULL)) {
g_free(fdt);
rc = SPAPR_DR_CC_RESPONSE_ERROR;
goto out;
}
drc->fdt = fdt;
drc->ccs_offset = drc->fdt_start_offset;
drc->ccs_depth = 0;
}
do {
uint32_t tag;
const char *name;
const struct fdt_property *prop;
int fdt_offset_next, prop_len;
tag = fdt_next_tag(drc->fdt, drc->ccs_offset, &fdt_offset_next);
switch (tag) {
case FDT_BEGIN_NODE:
drc->ccs_depth++;
name = fdt_get_name(drc->fdt, drc->ccs_offset, NULL);
/* provide the name of the next OF node */
wa_offset = CC_VAL_DATA_OFFSET;
rtas_st(wa_addr, CC_IDX_NODE_NAME_OFFSET, wa_offset);
configure_connector_st(wa_addr, wa_offset, name, strlen(name) + 1);
resp = SPAPR_DR_CC_RESPONSE_NEXT_CHILD;
break;
case FDT_END_NODE:
drc->ccs_depth--;
if (drc->ccs_depth == 0) {
uint32_t drc_index = spapr_drc_index(drc);
/* done sending the device tree, move to configured state */
trace_spapr_drc_set_configured(drc_index);
drc->state = drck->ready_state;
/*
* Ensure that we are able to send the FDT fragment
* again via configure-connector call if the guest requests.
*/
drc->ccs_offset = drc->fdt_start_offset;
drc->ccs_depth = 0;
fdt_offset_next = drc->fdt_start_offset;
resp = SPAPR_DR_CC_RESPONSE_SUCCESS;
} else {
resp = SPAPR_DR_CC_RESPONSE_PREV_PARENT;
}
break;
case FDT_PROP:
prop = fdt_get_property_by_offset(drc->fdt, drc->ccs_offset,
&prop_len);
name = fdt_string(drc->fdt, fdt32_to_cpu(prop->nameoff));
/* provide the name of the next OF property */
wa_offset = CC_VAL_DATA_OFFSET;
rtas_st(wa_addr, CC_IDX_PROP_NAME_OFFSET, wa_offset);
configure_connector_st(wa_addr, wa_offset, name, strlen(name) + 1);
/* provide the length and value of the OF property. data gets
* placed immediately after NULL terminator of the OF property's
* name string
*/
wa_offset += strlen(name) + 1,
rtas_st(wa_addr, CC_IDX_PROP_LEN, prop_len);
rtas_st(wa_addr, CC_IDX_PROP_DATA_OFFSET, wa_offset);
configure_connector_st(wa_addr, wa_offset, prop->data, prop_len);
resp = SPAPR_DR_CC_RESPONSE_NEXT_PROPERTY;
break;
case FDT_END:
resp = SPAPR_DR_CC_RESPONSE_ERROR;
default:
/* keep seeking for an actionable tag */
break;
}
if (drc->ccs_offset >= 0) {
drc->ccs_offset = fdt_offset_next;
}
} while (resp == SPAPR_DR_CC_RESPONSE_CONTINUE);
rc = resp;
out:
rtas_st(rets, 0, rc);
}
static void spapr_drc_register_types(void)
{
type_register_static(&spapr_dr_connector_info);
type_register_static(&spapr_drc_physical_info);
type_register_static(&spapr_drc_logical_info);
type_register_static(&spapr_drc_cpu_info);
type_register_static(&spapr_drc_pci_info);
type_register_static(&spapr_drc_lmb_info);
type_register_static(&spapr_drc_phb_info);
type_register_static(&spapr_drc_pmem_info);
spapr_rtas_register(RTAS_SET_INDICATOR, "set-indicator",
rtas_set_indicator);
spapr_rtas_register(RTAS_GET_SENSOR_STATE, "get-sensor-state",
rtas_get_sensor_state);
spapr_rtas_register(RTAS_IBM_CONFIGURE_CONNECTOR, "ibm,configure-connector",
rtas_ibm_configure_connector);
}
type_init(spapr_drc_register_types)
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