332 lines
9.7 KiB
C
332 lines
9.7 KiB
C
/*
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* Dimm device for Memory Hotplug
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*
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* Copyright ProfitBricks GmbH 2012
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* Copyright (C) 2014 Red Hat Inc
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>
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*/
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#include "qemu/osdep.h"
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#include "hw/mem/pc-dimm.h"
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#include "hw/mem/nvdimm.h"
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#include "hw/mem/memory-device.h"
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#include "qapi/error.h"
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#include "qapi/visitor.h"
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#include "sysemu/numa.h"
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#include "trace.h"
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typedef struct pc_dimms_capacity {
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uint64_t size;
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Error **errp;
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} pc_dimms_capacity;
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void pc_dimm_memory_plug(DeviceState *dev, MachineState *machine,
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uint64_t align, Error **errp)
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{
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int slot;
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PCDIMMDevice *dimm = PC_DIMM(dev);
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PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
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MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm);
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Error *local_err = NULL;
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MemoryRegion *mr;
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uint64_t addr;
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mr = ddc->get_memory_region(dimm, &local_err);
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if (local_err) {
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goto out;
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}
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addr = object_property_get_uint(OBJECT(dimm),
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PC_DIMM_ADDR_PROP, &local_err);
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if (local_err) {
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goto out;
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}
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addr = memory_device_get_free_addr(machine, !addr ? NULL : &addr, align,
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memory_region_size(mr), &local_err);
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if (local_err) {
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goto out;
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}
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object_property_set_uint(OBJECT(dev), addr, PC_DIMM_ADDR_PROP, &local_err);
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if (local_err) {
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goto out;
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}
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trace_mhp_pc_dimm_assigned_address(addr);
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slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, &local_err);
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if (local_err) {
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goto out;
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}
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slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot,
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machine->ram_slots, &local_err);
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if (local_err) {
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goto out;
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}
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object_property_set_int(OBJECT(dev), slot, PC_DIMM_SLOT_PROP, &local_err);
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if (local_err) {
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goto out;
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}
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trace_mhp_pc_dimm_assigned_slot(slot);
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memory_device_plug_region(machine, mr, addr);
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vmstate_register_ram(vmstate_mr, dev);
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out:
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error_propagate(errp, local_err);
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}
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void pc_dimm_memory_unplug(DeviceState *dev, MachineState *machine)
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{
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PCDIMMDevice *dimm = PC_DIMM(dev);
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PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
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MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm);
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MemoryRegion *mr = ddc->get_memory_region(dimm, &error_abort);
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memory_device_unplug_region(machine, mr);
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vmstate_unregister_ram(vmstate_mr, dev);
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}
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static int pc_dimm_slot2bitmap(Object *obj, void *opaque)
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{
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unsigned long *bitmap = opaque;
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if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
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DeviceState *dev = DEVICE(obj);
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if (dev->realized) { /* count only realized DIMMs */
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PCDIMMDevice *d = PC_DIMM(obj);
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set_bit(d->slot, bitmap);
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}
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}
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object_child_foreach(obj, pc_dimm_slot2bitmap, opaque);
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return 0;
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}
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int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp)
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{
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unsigned long *bitmap;
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int slot = 0;
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if (max_slots <= 0) {
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error_setg(errp, "no slots where allocated, please specify "
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"the 'slots' option");
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return slot;
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}
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bitmap = bitmap_new(max_slots);
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object_child_foreach(qdev_get_machine(), pc_dimm_slot2bitmap, bitmap);
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/* check if requested slot is not occupied */
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if (hint) {
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if (*hint >= max_slots) {
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error_setg(errp, "invalid slot# %d, should be less than %d",
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*hint, max_slots);
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} else if (!test_bit(*hint, bitmap)) {
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slot = *hint;
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} else {
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error_setg(errp, "slot %d is busy", *hint);
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}
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goto out;
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}
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/* search for free slot */
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slot = find_first_zero_bit(bitmap, max_slots);
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if (slot == max_slots) {
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error_setg(errp, "no free slots available");
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}
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out:
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g_free(bitmap);
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return slot;
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}
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static Property pc_dimm_properties[] = {
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DEFINE_PROP_UINT64(PC_DIMM_ADDR_PROP, PCDIMMDevice, addr, 0),
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DEFINE_PROP_UINT32(PC_DIMM_NODE_PROP, PCDIMMDevice, node, 0),
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DEFINE_PROP_INT32(PC_DIMM_SLOT_PROP, PCDIMMDevice, slot,
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PC_DIMM_UNASSIGNED_SLOT),
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DEFINE_PROP_LINK(PC_DIMM_MEMDEV_PROP, PCDIMMDevice, hostmem,
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TYPE_MEMORY_BACKEND, HostMemoryBackend *),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void pc_dimm_get_size(Object *obj, Visitor *v, const char *name,
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void *opaque, Error **errp)
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{
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uint64_t value;
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MemoryRegion *mr;
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PCDIMMDevice *dimm = PC_DIMM(obj);
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PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(obj);
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mr = ddc->get_memory_region(dimm, errp);
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if (!mr) {
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return;
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}
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value = memory_region_size(mr);
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visit_type_uint64(v, name, &value, errp);
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}
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static void pc_dimm_init(Object *obj)
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{
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object_property_add(obj, PC_DIMM_SIZE_PROP, "uint64", pc_dimm_get_size,
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NULL, NULL, NULL, &error_abort);
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}
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static void pc_dimm_realize(DeviceState *dev, Error **errp)
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{
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PCDIMMDevice *dimm = PC_DIMM(dev);
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PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
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if (!dimm->hostmem) {
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error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
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return;
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} else if (host_memory_backend_is_mapped(dimm->hostmem)) {
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char *path = object_get_canonical_path_component(OBJECT(dimm->hostmem));
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error_setg(errp, "can't use already busy memdev: %s", path);
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g_free(path);
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return;
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}
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if (((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) ||
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(!nb_numa_nodes && dimm->node)) {
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error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %"
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PRIu32 "' which exceeds the number of numa nodes: %d",
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dimm->node, nb_numa_nodes ? nb_numa_nodes : 1);
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return;
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}
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if (ddc->realize) {
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ddc->realize(dimm, errp);
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}
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host_memory_backend_set_mapped(dimm->hostmem, true);
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}
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static void pc_dimm_unrealize(DeviceState *dev, Error **errp)
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{
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PCDIMMDevice *dimm = PC_DIMM(dev);
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host_memory_backend_set_mapped(dimm->hostmem, false);
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}
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static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm, Error **errp)
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{
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if (!dimm->hostmem) {
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error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set");
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return NULL;
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}
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return host_memory_backend_get_memory(dimm->hostmem, errp);
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}
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static MemoryRegion *pc_dimm_get_vmstate_memory_region(PCDIMMDevice *dimm)
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{
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return host_memory_backend_get_memory(dimm->hostmem, &error_abort);
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}
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static uint64_t pc_dimm_md_get_addr(const MemoryDeviceState *md)
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{
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const PCDIMMDevice *dimm = PC_DIMM(md);
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return dimm->addr;
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}
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static uint64_t pc_dimm_md_get_region_size(const MemoryDeviceState *md)
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{
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/* dropping const here is fine as we don't touch the memory region */
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PCDIMMDevice *dimm = PC_DIMM(md);
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const PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(md);
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MemoryRegion *mr;
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mr = ddc->get_memory_region(dimm, &error_abort);
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if (!mr) {
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return 0;
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}
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return memory_region_size(mr);
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}
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static void pc_dimm_md_fill_device_info(const MemoryDeviceState *md,
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MemoryDeviceInfo *info)
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{
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PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1);
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const DeviceClass *dc = DEVICE_GET_CLASS(md);
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const PCDIMMDevice *dimm = PC_DIMM(md);
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const DeviceState *dev = DEVICE(md);
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if (dev->id) {
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di->has_id = true;
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di->id = g_strdup(dev->id);
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}
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di->hotplugged = dev->hotplugged;
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di->hotpluggable = dc->hotpluggable;
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di->addr = dimm->addr;
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di->slot = dimm->slot;
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di->node = dimm->node;
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di->size = object_property_get_uint(OBJECT(dimm), PC_DIMM_SIZE_PROP,
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NULL);
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di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem));
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if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) {
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info->u.nvdimm.data = di;
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info->type = MEMORY_DEVICE_INFO_KIND_NVDIMM;
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} else {
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info->u.dimm.data = di;
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info->type = MEMORY_DEVICE_INFO_KIND_DIMM;
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}
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}
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static void pc_dimm_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
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MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
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dc->realize = pc_dimm_realize;
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dc->unrealize = pc_dimm_unrealize;
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dc->props = pc_dimm_properties;
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dc->desc = "DIMM memory module";
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ddc->get_memory_region = pc_dimm_get_memory_region;
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ddc->get_vmstate_memory_region = pc_dimm_get_vmstate_memory_region;
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mdc->get_addr = pc_dimm_md_get_addr;
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/* for a dimm plugged_size == region_size */
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mdc->get_plugged_size = pc_dimm_md_get_region_size;
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mdc->get_region_size = pc_dimm_md_get_region_size;
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mdc->fill_device_info = pc_dimm_md_fill_device_info;
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}
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static TypeInfo pc_dimm_info = {
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.name = TYPE_PC_DIMM,
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.parent = TYPE_DEVICE,
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.instance_size = sizeof(PCDIMMDevice),
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.instance_init = pc_dimm_init,
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.class_init = pc_dimm_class_init,
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.class_size = sizeof(PCDIMMDeviceClass),
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.interfaces = (InterfaceInfo[]) {
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{ TYPE_MEMORY_DEVICE },
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{ }
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},
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};
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static void pc_dimm_register_types(void)
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{
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type_register_static(&pc_dimm_info);
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}
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type_init(pc_dimm_register_types)
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