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xemu/hw/pci-host/pnv_phb3_pbcq.c
Cédric Le Goater 23a782eb66 ppc/pnv: change the PowerNV machine devices to be non user creatable 
The PowerNV machine emulates an OpenPOWER system and the PowerNV chip
devices are models of the internal logic of the POWER processor. They
can not be instantiated by the user on the QEMU command line.

The PHB3/PHB4 devices could be an exception in the future after some
rework on how the device tree is built. For the moment, exclude them
also.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20200129113720.7404-1-clg@kaod.org>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2020-02-02 14:07:57 +11:00

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/*
* QEMU PowerPC PowerNV (POWER8) PHB3 model
*
* Copyright (c) 2014-2020, IBM Corporation.
*
* This code is licensed under the GPL version 2 or later. See the
* COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "qemu/log.h"
#include "target/ppc/cpu.h"
#include "hw/ppc/fdt.h"
#include "hw/pci-host/pnv_phb3_regs.h"
#include "hw/pci-host/pnv_phb3.h"
#include "hw/ppc/pnv.h"
#include "hw/ppc/pnv_xscom.h"
#include "hw/pci/pci_bridge.h"
#include "hw/pci/pci_bus.h"
#include <libfdt.h>
#define phb3_pbcq_error(pbcq, fmt, ...) \
qemu_log_mask(LOG_GUEST_ERROR, "phb3_pbcq[%d:%d]: " fmt "\n", \
(pbcq)->phb->chip_id, (pbcq)->phb->phb_id, ## __VA_ARGS__)
static uint64_t pnv_pbcq_nest_xscom_read(void *opaque, hwaddr addr,
unsigned size)
{
PnvPBCQState *pbcq = PNV_PBCQ(opaque);
uint32_t offset = addr >> 3;
return pbcq->nest_regs[offset];
}
static uint64_t pnv_pbcq_pci_xscom_read(void *opaque, hwaddr addr,
unsigned size)
{
PnvPBCQState *pbcq = PNV_PBCQ(opaque);
uint32_t offset = addr >> 3;
return pbcq->pci_regs[offset];
}
static uint64_t pnv_pbcq_spci_xscom_read(void *opaque, hwaddr addr,
unsigned size)
{
PnvPBCQState *pbcq = PNV_PBCQ(opaque);
uint32_t offset = addr >> 3;
if (offset == PBCQ_SPCI_ASB_DATA) {
return pnv_phb3_reg_read(pbcq->phb,
pbcq->spci_regs[PBCQ_SPCI_ASB_ADDR], 8);
}
return pbcq->spci_regs[offset];
}
static void pnv_pbcq_update_map(PnvPBCQState *pbcq)
{
uint64_t bar_en = pbcq->nest_regs[PBCQ_NEST_BAR_EN];
uint64_t bar, mask, size;
/*
* NOTE: This will really not work well if those are remapped
* after the PHB has created its sub regions. We could do better
* if we had a way to resize regions but we don't really care
* that much in practice as the stuff below really only happens
* once early during boot
*/
/* Handle unmaps */
if (memory_region_is_mapped(&pbcq->mmbar0) &&
!(bar_en & PBCQ_NEST_BAR_EN_MMIO0)) {
memory_region_del_subregion(get_system_memory(), &pbcq->mmbar0);
}
if (memory_region_is_mapped(&pbcq->mmbar1) &&
!(bar_en & PBCQ_NEST_BAR_EN_MMIO1)) {
memory_region_del_subregion(get_system_memory(), &pbcq->mmbar1);
}
if (memory_region_is_mapped(&pbcq->phbbar) &&
!(bar_en & PBCQ_NEST_BAR_EN_PHB)) {
memory_region_del_subregion(get_system_memory(), &pbcq->phbbar);
}
/* Update PHB */
pnv_phb3_update_regions(pbcq->phb);
/* Handle maps */
if (!memory_region_is_mapped(&pbcq->mmbar0) &&
(bar_en & PBCQ_NEST_BAR_EN_MMIO0)) {
bar = pbcq->nest_regs[PBCQ_NEST_MMIO_BAR0] >> 14;
mask = pbcq->nest_regs[PBCQ_NEST_MMIO_MASK0];
size = ((~mask) >> 14) + 1;
memory_region_init(&pbcq->mmbar0, OBJECT(pbcq), "pbcq-mmio0", size);
memory_region_add_subregion(get_system_memory(), bar, &pbcq->mmbar0);
pbcq->mmio0_base = bar;
pbcq->mmio0_size = size;
}
if (!memory_region_is_mapped(&pbcq->mmbar1) &&
(bar_en & PBCQ_NEST_BAR_EN_MMIO1)) {
bar = pbcq->nest_regs[PBCQ_NEST_MMIO_BAR1] >> 14;
mask = pbcq->nest_regs[PBCQ_NEST_MMIO_MASK1];
size = ((~mask) >> 14) + 1;
memory_region_init(&pbcq->mmbar1, OBJECT(pbcq), "pbcq-mmio1", size);
memory_region_add_subregion(get_system_memory(), bar, &pbcq->mmbar1);
pbcq->mmio1_base = bar;
pbcq->mmio1_size = size;
}
if (!memory_region_is_mapped(&pbcq->phbbar)
&& (bar_en & PBCQ_NEST_BAR_EN_PHB)) {
bar = pbcq->nest_regs[PBCQ_NEST_PHB_BAR] >> 14;
size = 0x1000;
memory_region_init(&pbcq->phbbar, OBJECT(pbcq), "pbcq-phb", size);
memory_region_add_subregion(get_system_memory(), bar, &pbcq->phbbar);
}
/* Update PHB */
pnv_phb3_update_regions(pbcq->phb);
}
static void pnv_pbcq_nest_xscom_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PnvPBCQState *pbcq = PNV_PBCQ(opaque);
uint32_t reg = addr >> 3;
switch (reg) {
case PBCQ_NEST_MMIO_BAR0:
case PBCQ_NEST_MMIO_BAR1:
case PBCQ_NEST_MMIO_MASK0:
case PBCQ_NEST_MMIO_MASK1:
if (pbcq->nest_regs[PBCQ_NEST_BAR_EN] &
(PBCQ_NEST_BAR_EN_MMIO0 |
PBCQ_NEST_BAR_EN_MMIO1)) {
phb3_pbcq_error(pbcq, "Changing enabled BAR unsupported");
}
pbcq->nest_regs[reg] = val & 0xffffffffc0000000ull;
break;
case PBCQ_NEST_PHB_BAR:
if (pbcq->nest_regs[PBCQ_NEST_BAR_EN] & PBCQ_NEST_BAR_EN_PHB) {
phb3_pbcq_error(pbcq, "Changing enabled BAR unsupported");
}
pbcq->nest_regs[reg] = val & 0xfffffffffc000000ull;
break;
case PBCQ_NEST_BAR_EN:
pbcq->nest_regs[reg] = val & 0xf800000000000000ull;
pnv_pbcq_update_map(pbcq);
pnv_phb3_remap_irqs(pbcq->phb);
break;
case PBCQ_NEST_IRSN_COMPARE:
case PBCQ_NEST_IRSN_MASK:
pbcq->nest_regs[reg] = val & PBCQ_NEST_IRSN_COMP;
pnv_phb3_remap_irqs(pbcq->phb);
break;
case PBCQ_NEST_LSI_SRC_ID:
pbcq->nest_regs[reg] = val & PBCQ_NEST_LSI_SRC;
pnv_phb3_remap_irqs(pbcq->phb);
break;
default:
phb3_pbcq_error(pbcq, "%s @0x%"HWADDR_PRIx"=%"PRIx64, __func__,
addr, val);
}
}
static void pnv_pbcq_pci_xscom_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PnvPBCQState *pbcq = PNV_PBCQ(opaque);
uint32_t reg = addr >> 3;
switch (reg) {
case PBCQ_PCI_BAR2:
pbcq->pci_regs[reg] = val & 0xfffffffffc000000ull;
pnv_pbcq_update_map(pbcq);
default:
phb3_pbcq_error(pbcq, "%s @0x%"HWADDR_PRIx"=%"PRIx64, __func__,
addr, val);
}
}
static void pnv_pbcq_spci_xscom_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PnvPBCQState *pbcq = PNV_PBCQ(opaque);
uint32_t reg = addr >> 3;
switch (reg) {
case PBCQ_SPCI_ASB_ADDR:
pbcq->spci_regs[reg] = val & 0xfff;
break;
case PBCQ_SPCI_ASB_STATUS:
pbcq->spci_regs[reg] &= ~val;
break;
case PBCQ_SPCI_ASB_DATA:
pnv_phb3_reg_write(pbcq->phb, pbcq->spci_regs[PBCQ_SPCI_ASB_ADDR],
val, 8);
break;
case PBCQ_SPCI_AIB_CAPP_EN:
case PBCQ_SPCI_CAPP_SEC_TMR:
break;
default:
phb3_pbcq_error(pbcq, "%s @0x%"HWADDR_PRIx"=%"PRIx64, __func__,
addr, val);
}
}
static const MemoryRegionOps pnv_pbcq_nest_xscom_ops = {
.read = pnv_pbcq_nest_xscom_read,
.write = pnv_pbcq_nest_xscom_write,
.valid.min_access_size = 8,
.valid.max_access_size = 8,
.impl.min_access_size = 8,
.impl.max_access_size = 8,
.endianness = DEVICE_BIG_ENDIAN,
};
static const MemoryRegionOps pnv_pbcq_pci_xscom_ops = {
.read = pnv_pbcq_pci_xscom_read,
.write = pnv_pbcq_pci_xscom_write,
.valid.min_access_size = 8,
.valid.max_access_size = 8,
.impl.min_access_size = 8,
.impl.max_access_size = 8,
.endianness = DEVICE_BIG_ENDIAN,
};
static const MemoryRegionOps pnv_pbcq_spci_xscom_ops = {
.read = pnv_pbcq_spci_xscom_read,
.write = pnv_pbcq_spci_xscom_write,
.valid.min_access_size = 8,
.valid.max_access_size = 8,
.impl.min_access_size = 8,
.impl.max_access_size = 8,
.endianness = DEVICE_BIG_ENDIAN,
};
static void pnv_pbcq_default_bars(PnvPBCQState *pbcq)
{
uint64_t mm0, mm1, reg;
PnvPHB3 *phb = pbcq->phb;
mm0 = 0x3d00000000000ull + 0x4000000000ull * phb->chip_id +
0x1000000000ull * phb->phb_id;
mm1 = 0x3ff8000000000ull + 0x0200000000ull * phb->chip_id +
0x0080000000ull * phb->phb_id;
reg = 0x3fffe40000000ull + 0x0000400000ull * phb->chip_id +
0x0000100000ull * phb->phb_id;
pbcq->nest_regs[PBCQ_NEST_MMIO_BAR0] = mm0 << 14;
pbcq->nest_regs[PBCQ_NEST_MMIO_BAR1] = mm1 << 14;
pbcq->nest_regs[PBCQ_NEST_PHB_BAR] = reg << 14;
pbcq->nest_regs[PBCQ_NEST_MMIO_MASK0] = 0x3fff000000000ull << 14;
pbcq->nest_regs[PBCQ_NEST_MMIO_MASK1] = 0x3ffff80000000ull << 14;
pbcq->pci_regs[PBCQ_PCI_BAR2] = reg << 14;
}
static void pnv_pbcq_realize(DeviceState *dev, Error **errp)
{
PnvPBCQState *pbcq = PNV_PBCQ(dev);
PnvPHB3 *phb;
char name[32];
assert(pbcq->phb);
phb = pbcq->phb;
/* TODO: Fix OPAL to do that: establish default BAR values */
pnv_pbcq_default_bars(pbcq);
/* Initialize the XSCOM region for the PBCQ registers */
snprintf(name, sizeof(name), "xscom-pbcq-nest-%d.%d",
phb->chip_id, phb->phb_id);
pnv_xscom_region_init(&pbcq->xscom_nest_regs, OBJECT(dev),
&pnv_pbcq_nest_xscom_ops, pbcq, name,
PNV_XSCOM_PBCQ_NEST_SIZE);
snprintf(name, sizeof(name), "xscom-pbcq-pci-%d.%d",
phb->chip_id, phb->phb_id);
pnv_xscom_region_init(&pbcq->xscom_pci_regs, OBJECT(dev),
&pnv_pbcq_pci_xscom_ops, pbcq, name,
PNV_XSCOM_PBCQ_PCI_SIZE);
snprintf(name, sizeof(name), "xscom-pbcq-spci-%d.%d",
phb->chip_id, phb->phb_id);
pnv_xscom_region_init(&pbcq->xscom_spci_regs, OBJECT(dev),
&pnv_pbcq_spci_xscom_ops, pbcq, name,
PNV_XSCOM_PBCQ_SPCI_SIZE);
}
static int pnv_pbcq_dt_xscom(PnvXScomInterface *dev, void *fdt,
int xscom_offset)
{
const char compat[] = "ibm,power8-pbcq";
PnvPHB3 *phb = PNV_PBCQ(dev)->phb;
char *name;
int offset;
uint32_t lpc_pcba = PNV_XSCOM_PBCQ_NEST_BASE + 0x400 * phb->phb_id;
uint32_t reg[] = {
cpu_to_be32(lpc_pcba),
cpu_to_be32(PNV_XSCOM_PBCQ_NEST_SIZE),
cpu_to_be32(PNV_XSCOM_PBCQ_PCI_BASE + 0x400 * phb->phb_id),
cpu_to_be32(PNV_XSCOM_PBCQ_PCI_SIZE),
cpu_to_be32(PNV_XSCOM_PBCQ_SPCI_BASE + 0x040 * phb->phb_id),
cpu_to_be32(PNV_XSCOM_PBCQ_SPCI_SIZE)
};
name = g_strdup_printf("pbcq@%x", lpc_pcba);
offset = fdt_add_subnode(fdt, xscom_offset, name);
_FDT(offset);
g_free(name);
_FDT((fdt_setprop(fdt, offset, "reg", reg, sizeof(reg))));
_FDT((fdt_setprop_cell(fdt, offset, "ibm,phb-index", phb->phb_id)));
_FDT((fdt_setprop_cell(fdt, offset, "ibm,chip-id", phb->chip_id)));
_FDT((fdt_setprop(fdt, offset, "compatible", compat,
sizeof(compat))));
return 0;
}
static void phb3_pbcq_instance_init(Object *obj)
{
PnvPBCQState *pbcq = PNV_PBCQ(obj);
object_property_add_link(obj, "phb", TYPE_PNV_PHB3,
(Object **)&pbcq->phb,
object_property_allow_set_link,
OBJ_PROP_LINK_STRONG,
&error_abort);
}
static void pnv_pbcq_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
xdc->dt_xscom = pnv_pbcq_dt_xscom;
dc->realize = pnv_pbcq_realize;
dc->user_creatable = false;
}
static const TypeInfo pnv_pbcq_type_info = {
.name = TYPE_PNV_PBCQ,
.parent = TYPE_DEVICE,
.instance_size = sizeof(PnvPBCQState),
.instance_init = phb3_pbcq_instance_init,
.class_init = pnv_pbcq_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_PNV_XSCOM_INTERFACE },
{ }
}
};
static void pnv_pbcq_register_types(void)
{
type_register_static(&pnv_pbcq_type_info);
}
type_init(pnv_pbcq_register_types)
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