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qemu-patch-raspberry4/hw/ppc/spapr_nvdimm.c
Shivaprasad G Bhat 9f9f82dace spapr: nvdimm: Fix the persistent-memory root node name in device tree 
The FDT code is adding the pmem root node by name "persistent-memory"
which should have been "ibm,persistent-memory".

The linux fetches the device tree nodes by type and it has been working
correctly as the type is correct. If someone searches by its intended
name it would fail, so fix that.

Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Message-Id: <162204278956.219.9061511386011411578.stgit@cc493db1e665>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2021-06-03 13:22:06 +10:00

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/*
* QEMU PAPR Storage Class Memory Interfaces
*
* Copyright (c) 2019-2020, IBM Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/ppc/spapr_drc.h"
#include "hw/ppc/spapr_nvdimm.h"
#include "hw/mem/nvdimm.h"
#include "qemu/nvdimm-utils.h"
#include "hw/ppc/fdt.h"
#include "qemu/range.h"
#include "hw/ppc/spapr_numa.h"
/* DIMM health bitmap bitmap indicators. Taken from kernel's papr_scm.c */
/* SCM device is unable to persist memory contents */
#define PAPR_PMEM_UNARMED PPC_BIT(0)
/*
* The nvdimm size should be aligned to SCM block size.
* The SCM block size should be aligned to SPAPR_MEMORY_BLOCK_SIZE
* in order to have SCM regions not to overlap with dimm memory regions.
* The SCM devices can have variable block sizes. For now, fixing the
* block size to the minimum value.
*/
#define SPAPR_MINIMUM_SCM_BLOCK_SIZE SPAPR_MEMORY_BLOCK_SIZE
/* Have an explicit check for alignment */
QEMU_BUILD_BUG_ON(SPAPR_MINIMUM_SCM_BLOCK_SIZE % SPAPR_MEMORY_BLOCK_SIZE);
bool spapr_nvdimm_validate(HotplugHandler *hotplug_dev, NVDIMMDevice *nvdimm,
uint64_t size, Error **errp)
{
const MachineClass *mc = MACHINE_GET_CLASS(hotplug_dev);
const MachineState *ms = MACHINE(hotplug_dev);
g_autofree char *uuidstr = NULL;
QemuUUID uuid;
int ret;
if (!mc->nvdimm_supported) {
error_setg(errp, "NVDIMM hotplug not supported for this machine");
return false;
}
if (!ms->nvdimms_state->is_enabled) {
error_setg(errp, "nvdimm device found but 'nvdimm=off' was set");
return false;
}
if (object_property_get_int(OBJECT(nvdimm), NVDIMM_LABEL_SIZE_PROP,
&error_abort) == 0) {
error_setg(errp, "PAPR requires NVDIMM devices to have label-size set");
return false;
}
if (size % SPAPR_MINIMUM_SCM_BLOCK_SIZE) {
error_setg(errp, "PAPR requires NVDIMM memory size (excluding label)"
" to be a multiple of %" PRIu64 "MB",
SPAPR_MINIMUM_SCM_BLOCK_SIZE / MiB);
return false;
}
uuidstr = object_property_get_str(OBJECT(nvdimm), NVDIMM_UUID_PROP,
&error_abort);
ret = qemu_uuid_parse(uuidstr, &uuid);
g_assert(!ret);
if (qemu_uuid_is_null(&uuid)) {
error_setg(errp, "NVDIMM device requires the uuid to be set");
return false;
}
return true;
}
void spapr_add_nvdimm(DeviceState *dev, uint64_t slot)
{
SpaprDrc *drc;
bool hotplugged = spapr_drc_hotplugged(dev);
drc = spapr_drc_by_id(TYPE_SPAPR_DRC_PMEM, slot);
g_assert(drc);
/*
* pc_dimm_get_free_slot() provided a free slot at pre-plug. The
* corresponding DRC is thus assumed to be attachable.
*/
spapr_drc_attach(drc, dev);
if (hotplugged) {
spapr_hotplug_req_add_by_index(drc);
}
}
static int spapr_dt_nvdimm(SpaprMachineState *spapr, void *fdt,
int parent_offset, NVDIMMDevice *nvdimm)
{
int child_offset;
char *buf;
SpaprDrc *drc;
uint32_t drc_idx;
uint32_t node = object_property_get_uint(OBJECT(nvdimm), PC_DIMM_NODE_PROP,
&error_abort);
uint64_t slot = object_property_get_uint(OBJECT(nvdimm), PC_DIMM_SLOT_PROP,
&error_abort);
uint64_t lsize = nvdimm->label_size;
uint64_t size = object_property_get_int(OBJECT(nvdimm), PC_DIMM_SIZE_PROP,
NULL);
drc = spapr_drc_by_id(TYPE_SPAPR_DRC_PMEM, slot);
g_assert(drc);
drc_idx = spapr_drc_index(drc);
buf = g_strdup_printf("ibm,pmemory@%x", drc_idx);
child_offset = fdt_add_subnode(fdt, parent_offset, buf);
g_free(buf);
_FDT(child_offset);
_FDT((fdt_setprop_cell(fdt, child_offset, "reg", drc_idx)));
_FDT((fdt_setprop_string(fdt, child_offset, "compatible", "ibm,pmemory")));
_FDT((fdt_setprop_string(fdt, child_offset, "device_type", "ibm,pmemory")));
spapr_numa_write_associativity_dt(spapr, fdt, child_offset, node);
buf = qemu_uuid_unparse_strdup(&nvdimm->uuid);
_FDT((fdt_setprop_string(fdt, child_offset, "ibm,unit-guid", buf)));
g_free(buf);
_FDT((fdt_setprop_cell(fdt, child_offset, "ibm,my-drc-index", drc_idx)));
_FDT((fdt_setprop_u64(fdt, child_offset, "ibm,block-size",
SPAPR_MINIMUM_SCM_BLOCK_SIZE)));
_FDT((fdt_setprop_u64(fdt, child_offset, "ibm,number-of-blocks",
size / SPAPR_MINIMUM_SCM_BLOCK_SIZE)));
_FDT((fdt_setprop_cell(fdt, child_offset, "ibm,metadata-size", lsize)));
_FDT((fdt_setprop_string(fdt, child_offset, "ibm,pmem-application",
"operating-system")));
_FDT(fdt_setprop(fdt, child_offset, "ibm,cache-flush-required", NULL, 0));
return child_offset;
}
int spapr_pmem_dt_populate(SpaprDrc *drc, SpaprMachineState *spapr,
void *fdt, int *fdt_start_offset, Error **errp)
{
NVDIMMDevice *nvdimm = NVDIMM(drc->dev);
*fdt_start_offset = spapr_dt_nvdimm(spapr, fdt, 0, nvdimm);
return 0;
}
void spapr_dt_persistent_memory(SpaprMachineState *spapr, void *fdt)
{
int offset = fdt_subnode_offset(fdt, 0, "ibm,persistent-memory");
GSList *iter, *nvdimms = nvdimm_get_device_list();
if (offset < 0) {
offset = fdt_add_subnode(fdt, 0, "ibm,persistent-memory");
_FDT(offset);
_FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 0x1)));
_FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0x0)));
_FDT((fdt_setprop_string(fdt, offset, "device_type",
"ibm,persistent-memory")));
}
/* Create DT entries for cold plugged NVDIMM devices */
for (iter = nvdimms; iter; iter = iter->next) {
NVDIMMDevice *nvdimm = iter->data;
spapr_dt_nvdimm(spapr, fdt, offset, nvdimm);
}
g_slist_free(nvdimms);
return;
}
static target_ulong h_scm_read_metadata(PowerPCCPU *cpu,
SpaprMachineState *spapr,
target_ulong opcode,
target_ulong *args)
{
uint32_t drc_index = args[0];
uint64_t offset = args[1];
uint64_t len = args[2];
SpaprDrc *drc = spapr_drc_by_index(drc_index);
NVDIMMDevice *nvdimm;
NVDIMMClass *ddc;
uint64_t data = 0;
uint8_t buf[8] = { 0 };
if (!drc || !drc->dev ||
spapr_drc_type(drc) != SPAPR_DR_CONNECTOR_TYPE_PMEM) {
return H_PARAMETER;
}
if (len != 1 && len != 2 &&
len != 4 && len != 8) {
return H_P3;
}
nvdimm = NVDIMM(drc->dev);
if ((offset + len < offset) ||
(nvdimm->label_size < len + offset)) {
return H_P2;
}
ddc = NVDIMM_GET_CLASS(nvdimm);
ddc->read_label_data(nvdimm, buf, len, offset);
switch (len) {
case 1:
data = ldub_p(buf);
break;
case 2:
data = lduw_be_p(buf);
break;
case 4:
data = ldl_be_p(buf);
break;
case 8:
data = ldq_be_p(buf);
break;
default:
g_assert_not_reached();
}
args[0] = data;
return H_SUCCESS;
}
static target_ulong h_scm_write_metadata(PowerPCCPU *cpu,
SpaprMachineState *spapr,
target_ulong opcode,
target_ulong *args)
{
uint32_t drc_index = args[0];
uint64_t offset = args[1];
uint64_t data = args[2];
uint64_t len = args[3];
SpaprDrc *drc = spapr_drc_by_index(drc_index);
NVDIMMDevice *nvdimm;
NVDIMMClass *ddc;
uint8_t buf[8] = { 0 };
if (!drc || !drc->dev ||
spapr_drc_type(drc) != SPAPR_DR_CONNECTOR_TYPE_PMEM) {
return H_PARAMETER;
}
if (len != 1 && len != 2 &&
len != 4 && len != 8) {
return H_P4;
}
nvdimm = NVDIMM(drc->dev);
if ((offset + len < offset) ||
(nvdimm->label_size < len + offset)) {
return H_P2;
}
switch (len) {
case 1:
if (data & 0xffffffffffffff00) {
return H_P2;
}
stb_p(buf, data);
break;
case 2:
if (data & 0xffffffffffff0000) {
return H_P2;
}
stw_be_p(buf, data);
break;
case 4:
if (data & 0xffffffff00000000) {
return H_P2;
}
stl_be_p(buf, data);
break;
case 8:
stq_be_p(buf, data);
break;
default:
g_assert_not_reached();
}
ddc = NVDIMM_GET_CLASS(nvdimm);
ddc->write_label_data(nvdimm, buf, len, offset);
return H_SUCCESS;
}
static target_ulong h_scm_bind_mem(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
uint32_t drc_index = args[0];
uint64_t starting_idx = args[1];
uint64_t no_of_scm_blocks_to_bind = args[2];
uint64_t target_logical_mem_addr = args[3];
uint64_t continue_token = args[4];
uint64_t size;
uint64_t total_no_of_scm_blocks;
SpaprDrc *drc = spapr_drc_by_index(drc_index);
hwaddr addr;
NVDIMMDevice *nvdimm;
if (!drc || !drc->dev ||
spapr_drc_type(drc) != SPAPR_DR_CONNECTOR_TYPE_PMEM) {
return H_PARAMETER;
}
/*
* Currently continue token should be zero qemu has already bound
* everything and this hcall doesnt return H_BUSY.
*/
if (continue_token > 0) {
return H_P5;
}
/* Currently qemu assigns the address. */
if (target_logical_mem_addr != 0xffffffffffffffff) {
return H_OVERLAP;
}
nvdimm = NVDIMM(drc->dev);
size = object_property_get_uint(OBJECT(nvdimm),
PC_DIMM_SIZE_PROP, &error_abort);
total_no_of_scm_blocks = size / SPAPR_MINIMUM_SCM_BLOCK_SIZE;
if (starting_idx > total_no_of_scm_blocks) {
return H_P2;
}
if (((starting_idx + no_of_scm_blocks_to_bind) < starting_idx) ||
((starting_idx + no_of_scm_blocks_to_bind) > total_no_of_scm_blocks)) {
return H_P3;
}
addr = object_property_get_uint(OBJECT(nvdimm),
PC_DIMM_ADDR_PROP, &error_abort);
addr += starting_idx * SPAPR_MINIMUM_SCM_BLOCK_SIZE;
/* Already bound, Return target logical address in R5 */
args[1] = addr;
args[2] = no_of_scm_blocks_to_bind;
return H_SUCCESS;
}
static target_ulong h_scm_unbind_mem(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
uint32_t drc_index = args[0];
uint64_t starting_scm_logical_addr = args[1];
uint64_t no_of_scm_blocks_to_unbind = args[2];
uint64_t continue_token = args[3];
uint64_t size_to_unbind;
Range blockrange = range_empty;
Range nvdimmrange = range_empty;
SpaprDrc *drc = spapr_drc_by_index(drc_index);
NVDIMMDevice *nvdimm;
uint64_t size, addr;
if (!drc || !drc->dev ||
spapr_drc_type(drc) != SPAPR_DR_CONNECTOR_TYPE_PMEM) {
return H_PARAMETER;
}
/* continue_token should be zero as this hcall doesn't return H_BUSY. */
if (continue_token > 0) {
return H_P4;
}
/* Check if starting_scm_logical_addr is block aligned */
if (!QEMU_IS_ALIGNED(starting_scm_logical_addr,
SPAPR_MINIMUM_SCM_BLOCK_SIZE)) {
return H_P2;
}
size_to_unbind = no_of_scm_blocks_to_unbind * SPAPR_MINIMUM_SCM_BLOCK_SIZE;
if (no_of_scm_blocks_to_unbind == 0 || no_of_scm_blocks_to_unbind !=
size_to_unbind / SPAPR_MINIMUM_SCM_BLOCK_SIZE) {
return H_P3;
}
nvdimm = NVDIMM(drc->dev);
size = object_property_get_int(OBJECT(nvdimm), PC_DIMM_SIZE_PROP,
&error_abort);
addr = object_property_get_int(OBJECT(nvdimm), PC_DIMM_ADDR_PROP,
&error_abort);
range_init_nofail(&nvdimmrange, addr, size);
range_init_nofail(&blockrange, starting_scm_logical_addr, size_to_unbind);
if (!range_contains_range(&nvdimmrange, &blockrange)) {
return H_P3;
}
args[1] = no_of_scm_blocks_to_unbind;
/* let unplug take care of actual unbind */
return H_SUCCESS;
}
#define H_UNBIND_SCOPE_ALL 0x1
#define H_UNBIND_SCOPE_DRC 0x2
static target_ulong h_scm_unbind_all(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
uint64_t target_scope = args[0];
uint32_t drc_index = args[1];
uint64_t continue_token = args[2];
NVDIMMDevice *nvdimm;
uint64_t size;
uint64_t no_of_scm_blocks_unbound = 0;
/* continue_token should be zero as this hcall doesn't return H_BUSY. */
if (continue_token > 0) {
return H_P4;
}
if (target_scope == H_UNBIND_SCOPE_DRC) {
SpaprDrc *drc = spapr_drc_by_index(drc_index);
if (!drc || !drc->dev ||
spapr_drc_type(drc) != SPAPR_DR_CONNECTOR_TYPE_PMEM) {
return H_P2;
}
nvdimm = NVDIMM(drc->dev);
size = object_property_get_int(OBJECT(nvdimm), PC_DIMM_SIZE_PROP,
&error_abort);
no_of_scm_blocks_unbound = size / SPAPR_MINIMUM_SCM_BLOCK_SIZE;
} else if (target_scope == H_UNBIND_SCOPE_ALL) {
GSList *list, *nvdimms;
nvdimms = nvdimm_get_device_list();
for (list = nvdimms; list; list = list->next) {
nvdimm = list->data;
size = object_property_get_int(OBJECT(nvdimm), PC_DIMM_SIZE_PROP,
&error_abort);
no_of_scm_blocks_unbound += size / SPAPR_MINIMUM_SCM_BLOCK_SIZE;
}
g_slist_free(nvdimms);
} else {
return H_PARAMETER;
}
args[1] = no_of_scm_blocks_unbound;
/* let unplug take care of actual unbind */
return H_SUCCESS;
}
static target_ulong h_scm_health(PowerPCCPU *cpu, SpaprMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
NVDIMMDevice *nvdimm;
uint64_t hbitmap = 0;
uint32_t drc_index = args[0];
SpaprDrc *drc = spapr_drc_by_index(drc_index);
const uint64_t hbitmap_mask = PAPR_PMEM_UNARMED;
/* Ensure that the drc is valid & is valid PMEM dimm and is plugged in */
if (!drc || !drc->dev ||
spapr_drc_type(drc) != SPAPR_DR_CONNECTOR_TYPE_PMEM) {
return H_PARAMETER;
}
nvdimm = NVDIMM(drc->dev);
/* Update if the nvdimm is unarmed and send its status via health bitmaps */
if (object_property_get_bool(OBJECT(nvdimm), NVDIMM_UNARMED_PROP, NULL)) {
hbitmap |= PAPR_PMEM_UNARMED;
}
/* Update the out args with health bitmap/mask */
args[0] = hbitmap;
args[1] = hbitmap_mask;
return H_SUCCESS;
}
static void spapr_scm_register_types(void)
{
/* qemu/scm specific hcalls */
spapr_register_hypercall(H_SCM_READ_METADATA, h_scm_read_metadata);
spapr_register_hypercall(H_SCM_WRITE_METADATA, h_scm_write_metadata);
spapr_register_hypercall(H_SCM_BIND_MEM, h_scm_bind_mem);
spapr_register_hypercall(H_SCM_UNBIND_MEM, h_scm_unbind_mem);
spapr_register_hypercall(H_SCM_UNBIND_ALL, h_scm_unbind_all);
spapr_register_hypercall(H_SCM_HEALTH, h_scm_health);
}
type_init(spapr_scm_register_types)
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