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qemu/hw/pci-host/sabre.c
Bernhard Beschow c925f40a29 hw/pci/pci: Remove multifunction parameter from pci_new_multifunction() 
There is also pci_new() which creates non-multifunction PCI devices.
Accordingly the parameter is always set to true when a multi function PCI
device is to be created.

The reason for the parameter's existence seems to be that it is used in the
internal PCI code as well which is the only location where it gets set to
false. This one usage can be resolved by factoring out an internal helper
function.

Remove this redundant, error-prone parameter.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20230304114043.121024-6-shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-07-10 18:59:32 -04:00

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/*
* QEMU Ultrasparc Sabre PCI host (PBM)
*
* Copyright (c) 2006 Fabrice Bellard
* Copyright (c) 2012,2013 Artyom Tarasenko
* Copyright (c) 2018 Mark Cave-Ayland
*
* 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 "hw/sysbus.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_host.h"
#include "hw/qdev-properties.h"
#include "hw/pci/pci_bridge.h"
#include "hw/pci/pci_bus.h"
#include "hw/irq.h"
#include "hw/pci-bridge/simba.h"
#include "hw/pci-host/sabre.h"
#include "qapi/error.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "sysemu/runstate.h"
#include "trace.h"
/*
* Chipset docs:
* PBM: "UltraSPARC IIi User's Manual",
* https://web.archive.org/web/20030403110020/http://www.sun.com/processors/manuals/805-0087.pdf
*/
#define PBM_PCI_IMR_MASK 0x7fffffff
#define PBM_PCI_IMR_ENABLED 0x80000000
#define POR (1U << 31)
#define SOFT_POR (1U << 30)
#define SOFT_XIR (1U << 29)
#define BTN_POR (1U << 28)
#define BTN_XIR (1U << 27)
#define RESET_MASK 0xf8000000
#define RESET_WCMASK 0x98000000
#define RESET_WMASK 0x60000000
#define NO_IRQ_REQUEST (MAX_IVEC + 1)
static inline void sabre_set_request(SabreState *s, unsigned int irq_num)
{
trace_sabre_set_request(irq_num);
s->irq_request = irq_num;
qemu_set_irq(s->ivec_irqs[irq_num], 1);
}
static inline void sabre_check_irqs(SabreState *s)
{
unsigned int i;
/* Previous request is not acknowledged, resubmit */
if (s->irq_request != NO_IRQ_REQUEST) {
sabre_set_request(s, s->irq_request);
return;
}
/* no request pending */
if (s->pci_irq_in == 0ULL) {
return;
}
for (i = 0; i < 32; i++) {
if (s->pci_irq_in & (1ULL << i)) {
if (s->pci_irq_map[i >> 2] & PBM_PCI_IMR_ENABLED) {
sabre_set_request(s, i);
return;
}
}
}
for (i = 32; i < 64; i++) {
if (s->pci_irq_in & (1ULL << i)) {
if (s->obio_irq_map[i - 32] & PBM_PCI_IMR_ENABLED) {
sabre_set_request(s, i);
break;
}
}
}
}
static inline void sabre_clear_request(SabreState *s, unsigned int irq_num)
{
trace_sabre_clear_request(irq_num);
qemu_set_irq(s->ivec_irqs[irq_num], 0);
s->irq_request = NO_IRQ_REQUEST;
}
static AddressSpace *sabre_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
{
IOMMUState *is = opaque;
return &is->iommu_as;
}
static void sabre_config_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
SabreState *s = opaque;
trace_sabre_config_write(addr, val);
switch (addr) {
case 0x30 ... 0x4f: /* DMA error registers */
/* XXX: not implemented yet */
break;
case 0xc00 ... 0xc3f: /* PCI interrupt control */
if (addr & 4) {
unsigned int ino = (addr & 0x3f) >> 3;
s->pci_irq_map[ino] &= PBM_PCI_IMR_MASK;
s->pci_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK;
if ((s->irq_request == ino) && !(val & ~PBM_PCI_IMR_MASK)) {
sabre_clear_request(s, ino);
}
sabre_check_irqs(s);
}
break;
case 0x1000 ... 0x107f: /* OBIO interrupt control */
if (addr & 4) {
unsigned int ino = ((addr & 0xff) >> 3);
s->obio_irq_map[ino] &= PBM_PCI_IMR_MASK;
s->obio_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK;
if ((s->irq_request == (ino | 0x20))
&& !(val & ~PBM_PCI_IMR_MASK)) {
sabre_clear_request(s, ino | 0x20);
}
sabre_check_irqs(s);
}
break;
case 0x1400 ... 0x14ff: /* PCI interrupt clear */
if (addr & 4) {
unsigned int ino = (addr & 0xff) >> 5;
if ((s->irq_request / 4) == ino) {
sabre_clear_request(s, s->irq_request);
sabre_check_irqs(s);
}
}
break;
case 0x1800 ... 0x1860: /* OBIO interrupt clear */
if (addr & 4) {
unsigned int ino = ((addr & 0xff) >> 3) | 0x20;
if (s->irq_request == ino) {
sabre_clear_request(s, ino);
sabre_check_irqs(s);
}
}
break;
case 0x2000 ... 0x202f: /* PCI control */
s->pci_control[(addr & 0x3f) >> 2] = val;
break;
case 0xf020 ... 0xf027: /* Reset control */
if (addr & 4) {
val &= RESET_MASK;
s->reset_control &= ~(val & RESET_WCMASK);
s->reset_control |= val & RESET_WMASK;
if (val & SOFT_POR) {
s->nr_resets = 0;
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
} else if (val & SOFT_XIR) {
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
}
}
break;
case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */
case 0xa400 ... 0xa67f: /* IOMMU diagnostics */
case 0xa800 ... 0xa80f: /* Interrupt diagnostics */
case 0xf000 ... 0xf01f: /* FFB config, memory control */
/* we don't care */
default:
break;
}
}
static uint64_t sabre_config_read(void *opaque,
hwaddr addr, unsigned size)
{
SabreState *s = opaque;
uint32_t val = 0;
switch (addr) {
case 0x30 ... 0x4f: /* DMA error registers */
/* XXX: not implemented yet */
break;
case 0xc00 ... 0xc3f: /* PCI interrupt control */
if (addr & 4) {
val = s->pci_irq_map[(addr & 0x3f) >> 3];
}
break;
case 0x1000 ... 0x107f: /* OBIO interrupt control */
if (addr & 4) {
val = s->obio_irq_map[(addr & 0xff) >> 3];
}
break;
case 0x1080 ... 0x108f: /* PCI bus error */
if (addr & 4) {
val = s->pci_err_irq_map[(addr & 0xf) >> 3];
}
break;
case 0x2000 ... 0x202f: /* PCI control */
val = s->pci_control[(addr & 0x3f) >> 2];
break;
case 0xf020 ... 0xf027: /* Reset control */
if (addr & 4) {
val = s->reset_control;
}
break;
case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */
case 0xa400 ... 0xa67f: /* IOMMU diagnostics */
case 0xa800 ... 0xa80f: /* Interrupt diagnostics */
case 0xf000 ... 0xf01f: /* FFB config, memory control */
/* we don't care */
default:
break;
}
trace_sabre_config_read(addr, val);
return val;
}
static const MemoryRegionOps sabre_config_ops = {
.read = sabre_config_read,
.write = sabre_config_write,
.endianness = DEVICE_BIG_ENDIAN,
};
static void sabre_pci_config_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
SabreState *s = opaque;
PCIHostState *phb = PCI_HOST_BRIDGE(s);
trace_sabre_pci_config_write(addr, val);
pci_data_write(phb->bus, addr, val, size);
}
static uint64_t sabre_pci_config_read(void *opaque, hwaddr addr,
unsigned size)
{
uint32_t ret;
SabreState *s = opaque;
PCIHostState *phb = PCI_HOST_BRIDGE(s);
ret = pci_data_read(phb->bus, addr, size);
trace_sabre_pci_config_read(addr, ret);
return ret;
}
/* The sabre host has an IRQ line for each IRQ line of each slot. */
static int pci_sabre_map_irq(PCIDevice *pci_dev, int irq_num)
{
/* Return the irq as swizzled by the PBM */
return irq_num;
}
static int pci_simbaA_map_irq(PCIDevice *pci_dev, int irq_num)
{
/* The on-board devices have fixed (legacy) OBIO intnos */
switch (PCI_SLOT(pci_dev->devfn)) {
case 1:
/* Onboard NIC */
return OBIO_NIC_IRQ;
case 3:
/* Onboard IDE */
return OBIO_HDD_IRQ;
default:
/* Normal intno, fall through */
break;
}
return ((PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f;
}
static int pci_simbaB_map_irq(PCIDevice *pci_dev, int irq_num)
{
return (0x10 + (PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f;
}
static void pci_sabre_set_irq(void *opaque, int irq_num, int level)
{
SabreState *s = opaque;
trace_sabre_pci_set_irq(irq_num, level);
/* PCI IRQ map onto the first 32 INO. */
if (irq_num < 32) {
if (level) {
s->pci_irq_in |= 1ULL << irq_num;
if (s->pci_irq_map[irq_num >> 2] & PBM_PCI_IMR_ENABLED) {
sabre_set_request(s, irq_num);
}
} else {
s->pci_irq_in &= ~(1ULL << irq_num);
}
} else {
/* OBIO IRQ map onto the next 32 INO. */
if (level) {
trace_sabre_pci_set_obio_irq(irq_num, level);
s->pci_irq_in |= 1ULL << irq_num;
if ((s->irq_request == NO_IRQ_REQUEST)
&& (s->obio_irq_map[irq_num - 32] & PBM_PCI_IMR_ENABLED)) {
sabre_set_request(s, irq_num);
}
} else {
s->pci_irq_in &= ~(1ULL << irq_num);
}
}
}
static void sabre_reset(DeviceState *d)
{
SabreState *s = SABRE(d);
PCIDevice *pci_dev;
unsigned int i;
uint16_t cmd;
for (i = 0; i < 8; i++) {
s->pci_irq_map[i] &= PBM_PCI_IMR_MASK;
}
for (i = 0; i < 32; i++) {
s->obio_irq_map[i] &= PBM_PCI_IMR_MASK;
}
s->irq_request = NO_IRQ_REQUEST;
s->pci_irq_in = 0ULL;
if (s->nr_resets++ == 0) {
/* Power on reset */
s->reset_control = POR;
}
/* As this is the busA PCI bridge which contains the on-board devices
* attached to the ebus, ensure that we initially allow IO transactions
* so that we get the early serial console until OpenBIOS can properly
* configure the PCI bridge itself */
pci_dev = PCI_DEVICE(s->bridgeA);
cmd = pci_get_word(pci_dev->config + PCI_COMMAND);
pci_set_word(pci_dev->config + PCI_COMMAND, cmd | PCI_COMMAND_IO);
pci_bridge_update_mappings(PCI_BRIDGE(pci_dev));
}
static const MemoryRegionOps pci_config_ops = {
.read = sabre_pci_config_read,
.write = sabre_pci_config_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void sabre_realize(DeviceState *dev, Error **errp)
{
SabreState *s = SABRE(dev);
PCIHostState *phb = PCI_HOST_BRIDGE(dev);
PCIDevice *pci_dev;
memory_region_init(&s->pci_mmio, OBJECT(s), "pci-mmio", 0x100000000ULL);
memory_region_add_subregion(get_system_memory(), s->mem_base,
&s->pci_mmio);
phb->bus = pci_register_root_bus(dev, "pci",
pci_sabre_set_irq, pci_sabre_map_irq, s,
&s->pci_mmio,
&s->pci_ioport,
0, 0x40, TYPE_PCI_BUS);
pci_create_simple(phb->bus, 0, TYPE_SABRE_PCI_DEVICE);
/* IOMMU */
memory_region_add_subregion_overlap(&s->sabre_config, 0x200,
sysbus_mmio_get_region(SYS_BUS_DEVICE(s->iommu), 0), 1);
pci_setup_iommu(phb->bus, sabre_pci_dma_iommu, s->iommu);
/* APB secondary busses */
pci_dev = pci_new_multifunction(PCI_DEVFN(1, 0), TYPE_SIMBA_PCI_BRIDGE);
s->bridgeB = PCI_BRIDGE(pci_dev);
pci_bridge_map_irq(s->bridgeB, "pciB", pci_simbaB_map_irq);
pci_realize_and_unref(pci_dev, phb->bus, &error_fatal);
pci_dev = pci_new_multifunction(PCI_DEVFN(1, 1), TYPE_SIMBA_PCI_BRIDGE);
s->bridgeA = PCI_BRIDGE(pci_dev);
pci_bridge_map_irq(s->bridgeA, "pciA", pci_simbaA_map_irq);
pci_realize_and_unref(pci_dev, phb->bus, &error_fatal);
}
static void sabre_init(Object *obj)
{
SabreState *s = SABRE(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
unsigned int i;
for (i = 0; i < 8; i++) {
s->pci_irq_map[i] = (0x1f << 6) | (i << 2);
}
for (i = 0; i < 2; i++) {
s->pci_err_irq_map[i] = (0x1f << 6) | 0x30;
}
for (i = 0; i < 32; i++) {
s->obio_irq_map[i] = ((0x1f << 6) | 0x20) + i;
}
qdev_init_gpio_in_named(DEVICE(s), pci_sabre_set_irq, "pbm-irq", MAX_IVEC);
qdev_init_gpio_out_named(DEVICE(s), s->ivec_irqs, "ivec-irq", MAX_IVEC);
s->irq_request = NO_IRQ_REQUEST;
s->pci_irq_in = 0ULL;
/* IOMMU */
object_property_add_link(obj, "iommu", TYPE_SUN4U_IOMMU,
(Object **) &s->iommu,
qdev_prop_allow_set_link_before_realize,
0);
/* sabre_config */
memory_region_init_io(&s->sabre_config, OBJECT(s), &sabre_config_ops, s,
"sabre-config", 0x10000);
/* at region 0 */
sysbus_init_mmio(sbd, &s->sabre_config);
memory_region_init_io(&s->pci_config, OBJECT(s), &pci_config_ops, s,
"sabre-pci-config", 0x1000000);
/* at region 1 */
sysbus_init_mmio(sbd, &s->pci_config);
/* pci_ioport */
memory_region_init(&s->pci_ioport, OBJECT(s), "sabre-pci-ioport",
0x1000000);
/* at region 2 */
sysbus_init_mmio(sbd, &s->pci_ioport);
}
static void sabre_pci_realize(PCIDevice *d, Error **errp)
{
pci_set_word(d->config + PCI_COMMAND,
PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
pci_set_word(d->config + PCI_STATUS,
PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ |
PCI_STATUS_DEVSEL_MEDIUM);
}
static void sabre_pci_class_init(ObjectClass *klass, void *data)
{
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
k->realize = sabre_pci_realize;
k->vendor_id = PCI_VENDOR_ID_SUN;
k->device_id = PCI_DEVICE_ID_SUN_SABRE;
k->class_id = PCI_CLASS_BRIDGE_HOST;
/*
* PCI-facing part of the host bridge, not usable without the
* host-facing part, which can't be device_add'ed, yet.
*/
dc->user_creatable = false;
}
static const TypeInfo sabre_pci_info = {
.name = TYPE_SABRE_PCI_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(SabrePCIState),
.class_init = sabre_pci_class_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static char *sabre_ofw_unit_address(const SysBusDevice *dev)
{
SabreState *s = SABRE(dev);
return g_strdup_printf("%x,%x",
(uint32_t)((s->special_base >> 32) & 0xffffffff),
(uint32_t)(s->special_base & 0xffffffff));
}
static Property sabre_properties[] = {
DEFINE_PROP_UINT64("special-base", SabreState, special_base, 0),
DEFINE_PROP_UINT64("mem-base", SabreState, mem_base, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void sabre_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
dc->realize = sabre_realize;
dc->reset = sabre_reset;
device_class_set_props(dc, sabre_properties);
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->fw_name = "pci";
sbc->explicit_ofw_unit_address = sabre_ofw_unit_address;
}
static const TypeInfo sabre_info = {
.name = TYPE_SABRE,
.parent = TYPE_PCI_HOST_BRIDGE,
.instance_size = sizeof(SabreState),
.instance_init = sabre_init,
.class_init = sabre_class_init,
};
static void sabre_register_types(void)
{
type_register_static(&sabre_info);
type_register_static(&sabre_pci_info);
}
type_init(sabre_register_types)
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