/*
* Emulation of the ibm,plb-pcix PCI controller
* This is found in some 440 SoCs e.g. the 460EX.
*
* Copyright (c) 2016-2018 BALATON Zoltan
*
* Derived from ppc4xx_pci.c and pci-host/ppce500.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "hw/irq.h"
#include "hw/ppc/ppc.h"
#include "hw/ppc/ppc4xx.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_host.h"
#include "exec/address-spaces.h"
#include "trace.h"
#include "qom/object.h"
struct PLBOutMap {
uint64_t la;
uint64_t pcia;
uint32_t sa;
MemoryRegion mr;
};
struct PLBInMap {
uint64_t sa;
uint64_t la;
MemoryRegion mr;
};
#define TYPE_PPC440_PCIX_HOST_BRIDGE "ppc440-pcix-host"
OBJECT_DECLARE_SIMPLE_TYPE(PPC440PCIXState, PPC440_PCIX_HOST_BRIDGE)
#define PPC440_PCIX_NR_POMS 3
#define PPC440_PCIX_NR_PIMS 3
struct PPC440PCIXState {
PCIHostState parent_obj;
PCIDevice *dev;
struct PLBOutMap pom[PPC440_PCIX_NR_POMS];
struct PLBInMap pim[PPC440_PCIX_NR_PIMS];
uint32_t sts;
qemu_irq irq;
AddressSpace bm_as;
MemoryRegion bm;
MemoryRegion container;
MemoryRegion iomem;
MemoryRegion busmem;
};
#define PPC440_REG_BASE 0x80000
#define PPC440_REG_SIZE 0xff
#define PCIC0_CFGADDR 0x0
#define PCIC0_CFGDATA 0x4
#define PCIX0_POM0LAL 0x68
#define PCIX0_POM0LAH 0x6c
#define PCIX0_POM0SA 0x70
#define PCIX0_POM0PCIAL 0x74
#define PCIX0_POM0PCIAH 0x78
#define PCIX0_POM1LAL 0x7c
#define PCIX0_POM1LAH 0x80
#define PCIX0_POM1SA 0x84
#define PCIX0_POM1PCIAL 0x88
#define PCIX0_POM1PCIAH 0x8c
#define PCIX0_POM2SA 0x90
#define PCIX0_PIM0SAL 0x98
#define PCIX0_PIM0LAL 0x9c
#define PCIX0_PIM0LAH 0xa0
#define PCIX0_PIM1SA 0xa4
#define PCIX0_PIM1LAL 0xa8
#define PCIX0_PIM1LAH 0xac
#define PCIX0_PIM2SAL 0xb0
#define PCIX0_PIM2LAL 0xb4
#define PCIX0_PIM2LAH 0xb8
#define PCIX0_PIM0SAH 0xf8
#define PCIX0_PIM2SAH 0xfc
#define PCIX0_STS 0xe0
#define PCI_ALL_SIZE (PPC440_REG_BASE + PPC440_REG_SIZE)
static void ppc440_pcix_clear_region(MemoryRegion *parent,
MemoryRegion *mem)
{
if (memory_region_is_mapped(mem)) {
memory_region_del_subregion(parent, mem);
object_unparent(OBJECT(mem));
}
}
/* DMA mapping */
static void ppc440_pcix_update_pim(PPC440PCIXState *s, int idx)
{
MemoryRegion *mem = &s->pim[idx].mr;
char *name;
uint64_t size;
/* Before we modify anything, unmap and destroy the region */
ppc440_pcix_clear_region(&s->bm, mem);
if (!(s->pim[idx].sa & 1)) {
/* Not enabled, nothing to do */
return;
}
name = g_strdup_printf("PCI Inbound Window %d", idx);
size = ~(s->pim[idx].sa & ~7ULL) + 1;
memory_region_init_alias(mem, OBJECT(s), name, get_system_memory(),
s->pim[idx].la, size);
memory_region_add_subregion_overlap(&s->bm, 0, mem, -1);
g_free(name);
trace_ppc440_pcix_update_pim(idx, size, s->pim[idx].la);
}
/* BAR mapping */
static void ppc440_pcix_update_pom(PPC440PCIXState *s, int idx)
{
MemoryRegion *mem = &s->pom[idx].mr;
MemoryRegion *address_space_mem = get_system_memory();
char *name;
uint32_t size;
/* Before we modify anything, unmap and destroy the region */
ppc440_pcix_clear_region(address_space_mem, mem);
if (!(s->pom[idx].sa & 1)) {
/* Not enabled, nothing to do */
return;
}
name = g_strdup_printf("PCI Outbound Window %d", idx);
size = ~(s->pom[idx].sa & 0xfffffffe) + 1;
if (!size) {
size = 0xffffffff;
}
memory_region_init_alias(mem, OBJECT(s), name, &s->busmem,
s->pom[idx].pcia, size);
memory_region_add_subregion(address_space_mem, s->pom[idx].la, mem);
g_free(name);
trace_ppc440_pcix_update_pom(idx, size, s->pom[idx].la, s->pom[idx].pcia);
}
static void ppc440_pcix_reg_write4(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
struct PPC440PCIXState *s = opaque;
trace_ppc440_pcix_reg_write(addr, val, size);
switch (addr) {
case PCI_VENDOR_ID ... PCI_MAX_LAT:
stl_le_p(s->dev->config + addr, val);
break;
case PCIX0_POM0LAL:
s->pom[0].la &= 0xffffffff00000000ULL;
s->pom[0].la |= val;
ppc440_pcix_update_pom(s, 0);
break;
case PCIX0_POM0LAH:
s->pom[0].la &= 0xffffffffULL;
s->pom[0].la |= val << 32;
ppc440_pcix_update_pom(s, 0);
break;
case PCIX0_POM0SA:
s->pom[0].sa = val;
ppc440_pcix_update_pom(s, 0);
break;
case PCIX0_POM0PCIAL:
s->pom[0].pcia &= 0xffffffff00000000ULL;
s->pom[0].pcia |= val;
ppc440_pcix_update_pom(s, 0);
break;
case PCIX0_POM0PCIAH:
s->pom[0].pcia &= 0xffffffffULL;
s->pom[0].pcia |= val << 32;
ppc440_pcix_update_pom(s, 0);
break;
case PCIX0_POM1LAL:
s->pom[1].la &= 0xffffffff00000000ULL;
s->pom[1].la |= val;
ppc440_pcix_update_pom(s, 1);
break;
case PCIX0_POM1LAH:
s->pom[1].la &= 0xffffffffULL;
s->pom[1].la |= val << 32;
ppc440_pcix_update_pom(s, 1);
break;
case PCIX0_POM1SA:
s->pom[1].sa = val;
ppc440_pcix_update_pom(s, 1);
break;
case PCIX0_POM1PCIAL:
s->pom[1].pcia &= 0xffffffff00000000ULL;
s->pom[1].pcia |= val;
ppc440_pcix_update_pom(s, 1);
break;
case PCIX0_POM1PCIAH:
s->pom[1].pcia &= 0xffffffffULL;
s->pom[1].pcia |= val << 32;
ppc440_pcix_update_pom(s, 1);
break;
case PCIX0_POM2SA:
s->pom[2].sa = val;
break;
case PCIX0_PIM0SAL:
s->pim[0].sa &= 0xffffffff00000000ULL;
s->pim[0].sa |= val;
ppc440_pcix_update_pim(s, 0);
break;
case PCIX0_PIM0LAL:
s->pim[0].la &= 0xffffffff00000000ULL;
s->pim[0].la |= val;
ppc440_pcix_update_pim(s, 0);
break;
case PCIX0_PIM0LAH:
s->pim[0].la &= 0xffffffffULL;
s->pim[0].la |= val << 32;
ppc440_pcix_update_pim(s, 0);
break;
case PCIX0_PIM1SA:
s->pim[1].sa = val;
ppc440_pcix_update_pim(s, 1);
break;
case PCIX0_PIM1LAL:
s->pim[1].la &= 0xffffffff00000000ULL;
s->pim[1].la |= val;
ppc440_pcix_update_pim(s, 1);
break;
case PCIX0_PIM1LAH:
s->pim[1].la &= 0xffffffffULL;
s->pim[1].la |= val << 32;
ppc440_pcix_update_pim(s, 1);
break;
case PCIX0_PIM2SAL:
s->pim[2].sa &= 0xffffffff00000000ULL;
s->pim[2].sa |= val;
ppc440_pcix_update_pim(s, 2);
break;
case PCIX0_PIM2LAL:
s->pim[2].la &= 0xffffffff00000000ULL;
s->pim[2].la |= val;
ppc440_pcix_update_pim(s, 2);
break;
case PCIX0_PIM2LAH:
s->pim[2].la &= 0xffffffffULL;
s->pim[2].la |= val << 32;
ppc440_pcix_update_pim(s, 2);
break;
case PCIX0_STS:
s->sts = val;
break;
case PCIX0_PIM0SAH:
s->pim[0].sa &= 0xffffffffULL;
s->pim[0].sa |= val << 32;
ppc440_pcix_update_pim(s, 0);
break;
case PCIX0_PIM2SAH:
s->pim[2].sa &= 0xffffffffULL;
s->pim[2].sa |= val << 32;
ppc440_pcix_update_pim(s, 2);
break;
default:
qemu_log_mask(LOG_UNIMP,
"%s: unhandled PCI internal register 0x%"HWADDR_PRIx"\n",
__func__, addr);
break;
}
}
static uint64_t ppc440_pcix_reg_read4(void *opaque, hwaddr addr,
unsigned size)
{
struct PPC440PCIXState *s = opaque;
uint32_t val;
switch (addr) {
case PCI_VENDOR_ID ... PCI_MAX_LAT:
val = ldl_le_p(s->dev->config + addr);
break;
case PCIX0_POM0LAL:
val = s->pom[0].la;
break;
case PCIX0_POM0LAH:
val = s->pom[0].la >> 32;
break;
case PCIX0_POM0SA:
val = s->pom[0].sa;
break;
case PCIX0_POM0PCIAL:
val = s->pom[0].pcia;
break;
case PCIX0_POM0PCIAH:
val = s->pom[0].pcia >> 32;
break;
case PCIX0_POM1LAL:
val = s->pom[1].la;
break;
case PCIX0_POM1LAH:
val = s->pom[1].la >> 32;
break;
case PCIX0_POM1SA:
val = s->pom[1].sa;
break;
case PCIX0_POM1PCIAL:
val = s->pom[1].pcia;
break;
case PCIX0_POM1PCIAH:
val = s->pom[1].pcia >> 32;
break;
case PCIX0_POM2SA:
val = s->pom[2].sa;
break;
case PCIX0_PIM0SAL:
val = s->pim[0].sa;
break;
case PCIX0_PIM0LAL:
val = s->pim[0].la;
break;
case PCIX0_PIM0LAH:
val = s->pim[0].la >> 32;
break;
case PCIX0_PIM1SA:
val = s->pim[1].sa;
break;
case PCIX0_PIM1LAL:
val = s->pim[1].la;
break;
case PCIX0_PIM1LAH:
val = s->pim[1].la >> 32;
break;
case PCIX0_PIM2SAL:
val = s->pim[2].sa;
break;
case PCIX0_PIM2LAL:
val = s->pim[2].la;
break;
case PCIX0_PIM2LAH:
val = s->pim[2].la >> 32;
break;
case PCIX0_STS:
val = s->sts;
break;
case PCIX0_PIM0SAH:
val = s->pim[0].sa >> 32;
break;
case PCIX0_PIM2SAH:
val = s->pim[2].sa >> 32;
break;
default:
qemu_log_mask(LOG_UNIMP,
"%s: invalid PCI internal register 0x%" HWADDR_PRIx "\n",
__func__, addr);
val = 0;
}
trace_ppc440_pcix_reg_read(addr, val);
return val;
}
static const MemoryRegionOps pci_reg_ops = {
.read = ppc440_pcix_reg_read4,
.write = ppc440_pcix_reg_write4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void ppc440_pcix_reset(DeviceState *dev)
{
struct PPC440PCIXState *s = PPC440_PCIX_HOST_BRIDGE(dev);
int i;
for (i = 0; i < PPC440_PCIX_NR_POMS; i++) {
ppc440_pcix_clear_region(get_system_memory(), &s->pom[i].mr);
}
for (i = 0; i < PPC440_PCIX_NR_PIMS; i++) {
ppc440_pcix_clear_region(&s->bm, &s->pim[i].mr);
}
memset(s->pom, 0, sizeof(s->pom));
memset(s->pim, 0, sizeof(s->pim));
for (i = 0; i < PPC440_PCIX_NR_PIMS; i++) {
s->pim[i].sa = 0xffffffff00000000ULL;
}
s->sts = 0;
}
/*
* All four IRQ[ABCD] pins from all slots are tied to a single board
* IRQ, so our mapping function here maps everything to IRQ 0.
* The code in pci_change_irq_level() tracks the number of times
* the mapped IRQ is asserted and deasserted, so if multiple devices
* assert an IRQ at the same time the behaviour is correct.
*
* This may need further refactoring for boards that use multiple IRQ lines.
*/
static int ppc440_pcix_map_irq(PCIDevice *pci_dev, int irq_num)
{
trace_ppc440_pcix_map_irq(pci_dev->devfn, irq_num, 0);
return 0;
}
static void ppc440_pcix_set_irq(void *opaque, int irq_num, int level)
{
qemu_irq *pci_irq = opaque;
trace_ppc440_pcix_set_irq(irq_num);
if (irq_num < 0) {
error_report("%s: PCI irq %d", __func__, irq_num);
return;
}
qemu_set_irq(*pci_irq, level);
}
static AddressSpace *ppc440_pcix_set_iommu(PCIBus *b, void *opaque, int devfn)
{
PPC440PCIXState *s = opaque;
return &s->bm_as;
}
/*
* Some guests on sam460ex write all kinds of garbage here such as
* missing enable bit and low bits set and still expect this to work
* (apparently it does on real hardware because these boot there) so
* we have to override these ops here and fix it up
*/
static void pci_host_config_write(void *opaque, hwaddr addr,
uint64_t val, unsigned len)
{
PCIHostState *s = opaque;
if (addr != 0 || len != 4) {
return;
}
s->config_reg = (val & 0xfffffffcULL) | (1UL << 31);
}
static uint64_t pci_host_config_read(void *opaque, hwaddr addr,
unsigned len)
{
PCIHostState *s = opaque;
uint32_t val = s->config_reg;
return val;
}
const MemoryRegionOps ppc440_pcix_host_conf_ops = {
.read = pci_host_config_read,
.write = pci_host_config_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void ppc440_pcix_realize(DeviceState *dev, Error **errp)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
PPC440PCIXState *s;
PCIHostState *h;
h = PCI_HOST_BRIDGE(dev);
s = PPC440_PCIX_HOST_BRIDGE(dev);
sysbus_init_irq(sbd, &s->irq);
memory_region_init(&s->busmem, OBJECT(dev), "pci bus memory", UINT64_MAX);
h->bus = pci_register_root_bus(dev, NULL, ppc440_pcix_set_irq,
ppc440_pcix_map_irq, &s->irq, &s->busmem,
get_system_io(), PCI_DEVFN(0, 0), 1, TYPE_PCI_BUS);
s->dev = pci_create_simple(h->bus, PCI_DEVFN(0, 0), "ppc4xx-host-bridge");
memory_region_init(&s->bm, OBJECT(s), "bm-ppc440-pcix", UINT64_MAX);
memory_region_add_subregion(&s->bm, 0x0, &s->busmem);
address_space_init(&s->bm_as, &s->bm, "pci-bm");
pci_setup_iommu(h->bus, ppc440_pcix_set_iommu, s);
memory_region_init(&s->container, OBJECT(s), "pci-container", PCI_ALL_SIZE);
memory_region_init_io(&h->conf_mem, OBJECT(s), &ppc440_pcix_host_conf_ops,
h, "pci-conf-idx", 4);
memory_region_init_io(&h->data_mem, OBJECT(s), &pci_host_data_le_ops,
h, "pci-conf-data", 4);
memory_region_init_io(&s->iomem, OBJECT(s), &pci_reg_ops, s,
"pci.reg", PPC440_REG_SIZE);
memory_region_add_subregion(&s->container, PCIC0_CFGADDR, &h->conf_mem);
memory_region_add_subregion(&s->container, PCIC0_CFGDATA, &h->data_mem);
memory_region_add_subregion(&s->container, PPC440_REG_BASE, &s->iomem);
sysbus_init_mmio(sbd, &s->container);
}
static void ppc440_pcix_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = ppc440_pcix_realize;
dc->reset = ppc440_pcix_reset;
}
static const TypeInfo ppc440_pcix_info = {
.name = TYPE_PPC440_PCIX_HOST_BRIDGE,
.parent = TYPE_PCI_HOST_BRIDGE,
.instance_size = sizeof(PPC440PCIXState),
.class_init = ppc440_pcix_class_init,
};
static void ppc440_pcix_register_types(void)
{
type_register_static(&ppc440_pcix_info);
}
type_init(ppc440_pcix_register_types)
