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/*
* libqos PCI bindings for SPAPR
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "libqtest.h"
#include "libqos/pci-spapr.h"
#include "libqos/rtas.h"
#include "libqos/qgraph.h"
#include "hw/pci/pci_regs.h"
#include "qemu/host-utils.h"
#include "qemu/module.h"
/*
* PCI devices are always little-endian
* SPAPR by default is big-endian
* so PCI accessors need to swap data endianness
*/
static uint8_t qpci_spapr_pio_readb(QPCIBus *bus, uint32_t addr)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
return qtest_readb(bus->qts, s->pio_cpu_base + addr);
}
static void qpci_spapr_pio_writeb(QPCIBus *bus, uint32_t addr, uint8_t val)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
qtest_writeb(bus->qts, s->pio_cpu_base + addr, val);
}
static uint16_t qpci_spapr_pio_readw(QPCIBus *bus, uint32_t addr)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
return bswap16(qtest_readw(bus->qts, s->pio_cpu_base + addr));
}
static void qpci_spapr_pio_writew(QPCIBus *bus, uint32_t addr, uint16_t val)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
qtest_writew(bus->qts, s->pio_cpu_base + addr, bswap16(val));
}
static uint32_t qpci_spapr_pio_readl(QPCIBus *bus, uint32_t addr)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
return bswap32(qtest_readl(bus->qts, s->pio_cpu_base + addr));
}
static void qpci_spapr_pio_writel(QPCIBus *bus, uint32_t addr, uint32_t val)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
qtest_writel(bus->qts, s->pio_cpu_base + addr, bswap32(val));
}
static uint64_t qpci_spapr_pio_readq(QPCIBus *bus, uint32_t addr)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
return bswap64(qtest_readq(bus->qts, s->pio_cpu_base + addr));
}
static void qpci_spapr_pio_writeq(QPCIBus *bus, uint32_t addr, uint64_t val)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
qtest_writeq(bus->qts, s->pio_cpu_base + addr, bswap64(val));
}
static void qpci_spapr_memread(QPCIBus *bus, uint32_t addr,
void *buf, size_t len)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
qtest_memread(bus->qts, s->mmio32_cpu_base + addr, buf, len);
}
static void qpci_spapr_memwrite(QPCIBus *bus, uint32_t addr,
const void *buf, size_t len)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
qtest_memwrite(bus->qts, s->mmio32_cpu_base + addr, buf, len);
}
static uint8_t qpci_spapr_config_readb(QPCIBus *bus, int devfn, uint8_t offset)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
uint32_t config_addr = (devfn << 8) | offset;
return qrtas_ibm_read_pci_config(bus->qts, s->alloc, s->buid,
config_addr, 1);
}
static uint16_t qpci_spapr_config_readw(QPCIBus *bus, int devfn, uint8_t offset)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
uint32_t config_addr = (devfn << 8) | offset;
return qrtas_ibm_read_pci_config(bus->qts, s->alloc, s->buid,
config_addr, 2);
}
static uint32_t qpci_spapr_config_readl(QPCIBus *bus, int devfn, uint8_t offset)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
uint32_t config_addr = (devfn << 8) | offset;
return qrtas_ibm_read_pci_config(bus->qts, s->alloc, s->buid,
config_addr, 4);
}
static void qpci_spapr_config_writeb(QPCIBus *bus, int devfn, uint8_t offset,
uint8_t value)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
uint32_t config_addr = (devfn << 8) | offset;
qrtas_ibm_write_pci_config(bus->qts, s->alloc, s->buid,
config_addr, 1, value);
}
static void qpci_spapr_config_writew(QPCIBus *bus, int devfn, uint8_t offset,
uint16_t value)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
uint32_t config_addr = (devfn << 8) | offset;
qrtas_ibm_write_pci_config(bus->qts, s->alloc, s->buid,
config_addr, 2, value);
}
static void qpci_spapr_config_writel(QPCIBus *bus, int devfn, uint8_t offset,
uint32_t value)
{
QPCIBusSPAPR *s = container_of(bus, QPCIBusSPAPR, bus);
uint32_t config_addr = (devfn << 8) | offset;
qrtas_ibm_write_pci_config(bus->qts, s->alloc, s->buid,
config_addr, 4, value);
}
#define SPAPR_PCI_BASE (1ULL << 45)
#define SPAPR_PCI_MMIO32_WIN_SIZE 0x80000000 /* 2 GiB */
#define SPAPR_PCI_IO_WIN_SIZE 0x10000
static void *qpci_spapr_get_driver(void *obj, const char *interface)
{
QPCIBusSPAPR *qpci = obj;
if (!g_strcmp0(interface, "pci-bus")) {
return &qpci->bus;
}
fprintf(stderr, "%s not present in pci-bus-spapr", interface);
g_assert_not_reached();
}
void qpci_init_spapr(QPCIBusSPAPR *qpci, QTestState *qts,
QGuestAllocator *alloc)
{
assert(qts);
/* tests cannot use spapr, needs to be fixed first */
qpci->bus.has_buggy_msi = true;
qpci->alloc = alloc;
qpci->bus.pio_readb = qpci_spapr_pio_readb;
qpci->bus.pio_readw = qpci_spapr_pio_readw;
qpci->bus.pio_readl = qpci_spapr_pio_readl;
qpci->bus.pio_readq = qpci_spapr_pio_readq;
qpci->bus.pio_writeb = qpci_spapr_pio_writeb;
qpci->bus.pio_writew = qpci_spapr_pio_writew;
qpci->bus.pio_writel = qpci_spapr_pio_writel;
qpci->bus.pio_writeq = qpci_spapr_pio_writeq;
qpci->bus.memread = qpci_spapr_memread;
qpci->bus.memwrite = qpci_spapr_memwrite;
qpci->bus.config_readb = qpci_spapr_config_readb;
qpci->bus.config_readw = qpci_spapr_config_readw;
qpci->bus.config_readl = qpci_spapr_config_readl;
qpci->bus.config_writeb = qpci_spapr_config_writeb;
qpci->bus.config_writew = qpci_spapr_config_writew;
qpci->bus.config_writel = qpci_spapr_config_writel;
/* FIXME: We assume the default location of the PHB for now.
* Ideally we'd parse the device tree deposited in the guest to
* get the window locations */
qpci->buid = 0x800000020000000ULL;
qpci->pio_cpu_base = SPAPR_PCI_BASE;
qpci->pio.pci_base = 0;
qpci->pio.size = SPAPR_PCI_IO_WIN_SIZE;
/* 32-bit portion of the MMIO window is at PCI address 2..4 GiB */
qpci->mmio32_cpu_base = SPAPR_PCI_BASE;
qpci->mmio32.pci_base = SPAPR_PCI_MMIO32_WIN_SIZE;
qpci->mmio32.size = SPAPR_PCI_MMIO32_WIN_SIZE;
qpci->bus.qts = qts;
qpci->bus.pio_alloc_ptr = 0xc000;
qpci->bus.mmio_alloc_ptr = qpci->mmio32.pci_base;
qpci->bus.mmio_limit = qpci->mmio32.pci_base + qpci->mmio32.size;
qpci->obj.get_driver = qpci_spapr_get_driver;
}
QPCIBus *qpci_new_spapr(QTestState *qts, QGuestAllocator *alloc)
{
QPCIBusSPAPR *qpci = g_new0(QPCIBusSPAPR, 1);
qpci_init_spapr(qpci, qts, alloc);
return &qpci->bus;
}
void qpci_free_spapr(QPCIBus *bus)
{
QPCIBusSPAPR *s;
if (!bus) {
return;
}
s = container_of(bus, QPCIBusSPAPR, bus);
g_free(s);
}
static void qpci_spapr_register_nodes(void)
{
qos_node_create_driver("pci-bus-spapr", NULL);
qos_node_produces("pci-bus-spapr", "pci-bus");
}
libqos_init(qpci_spapr_register_nodes);
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