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qemu/hw/ppc/spapr_pci.c
Paolo Bonzini c0907c9e64 hw: move PCI bridges to hw/pci-* or hw/ARCH 
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-08 18:13:14 +02:00

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/*
* QEMU sPAPR PCI host originated from Uninorth PCI host
*
* Copyright (c) 2011 Alexey Kardashevskiy, IBM Corporation.
* Copyright (C) 2011 David Gibson, 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 "hw/hw.h"
#include "hw/pci/pci.h"
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "hw/pci/pci_host.h"
#include "hw/ppc/spapr.h"
#include "hw/pci-host/spapr.h"
#include "exec/address-spaces.h"
#include <libfdt.h>
#include "trace.h"
#include "hw/pci/pci_bus.h"
/* Copied from the kernel arch/powerpc/platforms/pseries/msi.c */
#define RTAS_QUERY_FN 0
#define RTAS_CHANGE_FN 1
#define RTAS_RESET_FN 2
#define RTAS_CHANGE_MSI_FN 3
#define RTAS_CHANGE_MSIX_FN 4
/* Interrupt types to return on RTAS_CHANGE_* */
#define RTAS_TYPE_MSI 1
#define RTAS_TYPE_MSIX 2
static sPAPRPHBState *find_phb(sPAPREnvironment *spapr, uint64_t buid)
{
sPAPRPHBState *sphb;
QLIST_FOREACH(sphb, &spapr->phbs, list) {
if (sphb->buid != buid) {
continue;
}
return sphb;
}
return NULL;
}
static PCIDevice *find_dev(sPAPREnvironment *spapr, uint64_t buid,
uint32_t config_addr)
{
sPAPRPHBState *sphb = find_phb(spapr, buid);
PCIHostState *phb = PCI_HOST_BRIDGE(sphb);
BusState *bus = BUS(phb->bus);
BusChild *kid;
int devfn = (config_addr >> 8) & 0xFF;
if (!phb) {
return NULL;
}
QTAILQ_FOREACH(kid, &bus->children, sibling) {
PCIDevice *dev = (PCIDevice *)kid->child;
if (dev->devfn == devfn) {
return dev;
}
}
return NULL;
}
static uint32_t rtas_pci_cfgaddr(uint32_t arg)
{
/* This handles the encoding of extended config space addresses */
return ((arg >> 20) & 0xf00) | (arg & 0xff);
}
static void finish_read_pci_config(sPAPREnvironment *spapr, uint64_t buid,
uint32_t addr, uint32_t size,
target_ulong rets)
{
PCIDevice *pci_dev;
uint32_t val;
if ((size != 1) && (size != 2) && (size != 4)) {
/* access must be 1, 2 or 4 bytes */
rtas_st(rets, 0, -1);
return;
}
pci_dev = find_dev(spapr, buid, addr);
addr = rtas_pci_cfgaddr(addr);
if (!pci_dev || (addr % size) || (addr >= pci_config_size(pci_dev))) {
/* Access must be to a valid device, within bounds and
* naturally aligned */
rtas_st(rets, 0, -1);
return;
}
val = pci_host_config_read_common(pci_dev, addr,
pci_config_size(pci_dev), size);
rtas_st(rets, 0, 0);
rtas_st(rets, 1, val);
}
static void rtas_ibm_read_pci_config(sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
uint64_t buid;
uint32_t size, addr;
if ((nargs != 4) || (nret != 2)) {
rtas_st(rets, 0, -1);
return;
}
buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
size = rtas_ld(args, 3);
addr = rtas_ld(args, 0);
finish_read_pci_config(spapr, buid, addr, size, rets);
}
static void rtas_read_pci_config(sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
uint32_t size, addr;
if ((nargs != 2) || (nret != 2)) {
rtas_st(rets, 0, -1);
return;
}
size = rtas_ld(args, 1);
addr = rtas_ld(args, 0);
finish_read_pci_config(spapr, 0, addr, size, rets);
}
static void finish_write_pci_config(sPAPREnvironment *spapr, uint64_t buid,
uint32_t addr, uint32_t size,
uint32_t val, target_ulong rets)
{
PCIDevice *pci_dev;
if ((size != 1) && (size != 2) && (size != 4)) {
/* access must be 1, 2 or 4 bytes */
rtas_st(rets, 0, -1);
return;
}
pci_dev = find_dev(spapr, buid, addr);
addr = rtas_pci_cfgaddr(addr);
if (!pci_dev || (addr % size) || (addr >= pci_config_size(pci_dev))) {
/* Access must be to a valid device, within bounds and
* naturally aligned */
rtas_st(rets, 0, -1);
return;
}
pci_host_config_write_common(pci_dev, addr, pci_config_size(pci_dev),
val, size);
rtas_st(rets, 0, 0);
}
static void rtas_ibm_write_pci_config(sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
uint64_t buid;
uint32_t val, size, addr;
if ((nargs != 5) || (nret != 1)) {
rtas_st(rets, 0, -1);
return;
}
buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
val = rtas_ld(args, 4);
size = rtas_ld(args, 3);
addr = rtas_ld(args, 0);
finish_write_pci_config(spapr, buid, addr, size, val, rets);
}
static void rtas_write_pci_config(sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
uint32_t val, size, addr;
if ((nargs != 3) || (nret != 1)) {
rtas_st(rets, 0, -1);
return;
}
val = rtas_ld(args, 2);
size = rtas_ld(args, 1);
addr = rtas_ld(args, 0);
finish_write_pci_config(spapr, 0, addr, size, val, rets);
}
/*
* Find an entry with config_addr or returns the empty one if not found AND
* alloc_new is set.
* At the moment the msi_table entries are never released so there is
* no point to look till the end of the list if we need to find the free entry.
*/
static int spapr_msicfg_find(sPAPRPHBState *phb, uint32_t config_addr,
bool alloc_new)
{
int i;
for (i = 0; i < SPAPR_MSIX_MAX_DEVS; ++i) {
if (!phb->msi_table[i].nvec) {
break;
}
if (phb->msi_table[i].config_addr == config_addr) {
return i;
}
}
if ((i < SPAPR_MSIX_MAX_DEVS) && alloc_new) {
trace_spapr_pci_msi("Allocating new MSI config", i, config_addr);
return i;
}
return -1;
}
/*
* Set MSI/MSIX message data.
* This is required for msi_notify()/msix_notify() which
* will write at the addresses via spapr_msi_write().
*/
static void spapr_msi_setmsg(PCIDevice *pdev, hwaddr addr,
bool msix, unsigned req_num)
{
unsigned i;
MSIMessage msg = { .address = addr, .data = 0 };
if (!msix) {
msi_set_message(pdev, msg);
trace_spapr_pci_msi_setup(pdev->name, 0, msg.address);
return;
}
for (i = 0; i < req_num; ++i) {
msg.address = addr | (i << 2);
msix_set_message(pdev, i, msg);
trace_spapr_pci_msi_setup(pdev->name, i, msg.address);
}
}
static void rtas_ibm_change_msi(sPAPREnvironment *spapr,
uint32_t token, uint32_t nargs,
target_ulong args, uint32_t nret,
target_ulong rets)
{
uint32_t config_addr = rtas_ld(args, 0);
uint64_t buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
unsigned int func = rtas_ld(args, 3);
unsigned int req_num = rtas_ld(args, 4); /* 0 == remove all */
unsigned int seq_num = rtas_ld(args, 5);
unsigned int ret_intr_type;
int ndev, irq;
sPAPRPHBState *phb = NULL;
PCIDevice *pdev = NULL;
switch (func) {
case RTAS_CHANGE_MSI_FN:
case RTAS_CHANGE_FN:
ret_intr_type = RTAS_TYPE_MSI;
break;
case RTAS_CHANGE_MSIX_FN:
ret_intr_type = RTAS_TYPE_MSIX;
break;
default:
fprintf(stderr, "rtas_ibm_change_msi(%u) is not implemented\n", func);
rtas_st(rets, 0, -3); /* Parameter error */
return;
}
/* Fins sPAPRPHBState */
phb = find_phb(spapr, buid);
if (phb) {
pdev = find_dev(spapr, buid, config_addr);
}
if (!phb || !pdev) {
rtas_st(rets, 0, -3); /* Parameter error */
return;
}
/* Releasing MSIs */
if (!req_num) {
ndev = spapr_msicfg_find(phb, config_addr, false);
if (ndev < 0) {
trace_spapr_pci_msi("MSI has not been enabled", -1, config_addr);
rtas_st(rets, 0, -1); /* Hardware error */
return;
}
trace_spapr_pci_msi("Released MSIs", ndev, config_addr);
rtas_st(rets, 0, 0);
rtas_st(rets, 1, 0);
return;
}
/* Enabling MSI */
/* Find a device number in the map to add or reuse the existing one */
ndev = spapr_msicfg_find(phb, config_addr, true);
if (ndev >= SPAPR_MSIX_MAX_DEVS || ndev < 0) {
fprintf(stderr, "No free entry for a new MSI device\n");
rtas_st(rets, 0, -1); /* Hardware error */
return;
}
trace_spapr_pci_msi("Configuring MSI", ndev, config_addr);
/* Check if there is an old config and MSI number has not changed */
if (phb->msi_table[ndev].nvec && (req_num != phb->msi_table[ndev].nvec)) {
/* Unexpected behaviour */
fprintf(stderr, "Cannot reuse MSI config for device#%d", ndev);
rtas_st(rets, 0, -1); /* Hardware error */
return;
}
/* There is no cached config, allocate MSIs */
if (!phb->msi_table[ndev].nvec) {
irq = spapr_allocate_irq_block(req_num, false);
if (irq < 0) {
fprintf(stderr, "Cannot allocate MSIs for device#%d", ndev);
rtas_st(rets, 0, -1); /* Hardware error */
return;
}
phb->msi_table[ndev].irq = irq;
phb->msi_table[ndev].nvec = req_num;
phb->msi_table[ndev].config_addr = config_addr;
}
/* Setup MSI/MSIX vectors in the device (via cfgspace or MSIX BAR) */
spapr_msi_setmsg(pdev, phb->msi_win_addr | (ndev << 16),
ret_intr_type == RTAS_TYPE_MSIX, req_num);
rtas_st(rets, 0, 0);
rtas_st(rets, 1, req_num);
rtas_st(rets, 2, ++seq_num);
rtas_st(rets, 3, ret_intr_type);
trace_spapr_pci_rtas_ibm_change_msi(func, req_num);
}
static void rtas_ibm_query_interrupt_source_number(sPAPREnvironment *spapr,
uint32_t token,
uint32_t nargs,
target_ulong args,
uint32_t nret,
target_ulong rets)
{
uint32_t config_addr = rtas_ld(args, 0);
uint64_t buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
unsigned int intr_src_num = -1, ioa_intr_num = rtas_ld(args, 3);
int ndev;
sPAPRPHBState *phb = NULL;
/* Fins sPAPRPHBState */
phb = find_phb(spapr, buid);
if (!phb) {
rtas_st(rets, 0, -3); /* Parameter error */
return;
}
/* Find device descriptor and start IRQ */
ndev = spapr_msicfg_find(phb, config_addr, false);
if (ndev < 0) {
trace_spapr_pci_msi("MSI has not been enabled", -1, config_addr);
rtas_st(rets, 0, -1); /* Hardware error */
return;
}
intr_src_num = phb->msi_table[ndev].irq + ioa_intr_num;
trace_spapr_pci_rtas_ibm_query_interrupt_source_number(ioa_intr_num,
intr_src_num);
rtas_st(rets, 0, 0);
rtas_st(rets, 1, intr_src_num);
rtas_st(rets, 2, 1);/* 0 == level; 1 == edge */
}
static int pci_spapr_swizzle(int slot, int pin)
{
return (slot + pin) % PCI_NUM_PINS;
}
static int pci_spapr_map_irq(PCIDevice *pci_dev, int irq_num)
{
/*
* Here we need to convert pci_dev + irq_num to some unique value
* which is less than number of IRQs on the specific bus (4). We
* use standard PCI swizzling, that is (slot number + pin number)
* % 4.
*/
return pci_spapr_swizzle(PCI_SLOT(pci_dev->devfn), irq_num);
}
static void pci_spapr_set_irq(void *opaque, int irq_num, int level)
{
/*
* Here we use the number returned by pci_spapr_map_irq to find a
* corresponding qemu_irq.
*/
sPAPRPHBState *phb = opaque;
trace_spapr_pci_lsi_set(phb->dtbusname, irq_num, phb->lsi_table[irq_num].irq);
qemu_set_irq(spapr_phb_lsi_qirq(phb, irq_num), level);
}
static uint64_t spapr_io_read(void *opaque, hwaddr addr,
unsigned size)
{
switch (size) {
case 1:
return cpu_inb(addr);
case 2:
return cpu_inw(addr);
case 4:
return cpu_inl(addr);
}
assert(0);
}
static void spapr_io_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
switch (size) {
case 1:
cpu_outb(addr, data);
return;
case 2:
cpu_outw(addr, data);
return;
case 4:
cpu_outl(addr, data);
return;
}
assert(0);
}
static const MemoryRegionOps spapr_io_ops = {
.endianness = DEVICE_LITTLE_ENDIAN,
.read = spapr_io_read,
.write = spapr_io_write
};
/*
* MSI/MSIX memory region implementation.
* The handler handles both MSI and MSIX.
* For MSI-X, the vector number is encoded as a part of the address,
* data is set to 0.
* For MSI, the vector number is encoded in least bits in data.
*/
static void spapr_msi_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
sPAPRPHBState *phb = opaque;
int ndev = addr >> 16;
int vec = ((addr & 0xFFFF) >> 2) | data;
uint32_t irq = phb->msi_table[ndev].irq + vec;
trace_spapr_pci_msi_write(addr, data, irq);
qemu_irq_pulse(xics_get_qirq(spapr->icp, irq));
}
static const MemoryRegionOps spapr_msi_ops = {
/* There is no .read as the read result is undefined by PCI spec */
.read = NULL,
.write = spapr_msi_write,
.endianness = DEVICE_LITTLE_ENDIAN
};
/*
* PHB PCI device
*/
static DMAContext *spapr_pci_dma_context_fn(PCIBus *bus, void *opaque,
int devfn)
{
sPAPRPHBState *phb = opaque;
return phb->dma;
}
static int spapr_phb_init(SysBusDevice *s)
{
sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(s);
PCIHostState *phb = PCI_HOST_BRIDGE(s);
const char *busname;
char *namebuf;
int i;
PCIBus *bus;
if (sphb->index != -1) {
hwaddr windows_base;
if ((sphb->buid != -1) || (sphb->dma_liobn != -1)
|| (sphb->mem_win_addr != -1)
|| (sphb->io_win_addr != -1)
|| (sphb->msi_win_addr != -1)) {
fprintf(stderr, "Either \"index\" or other parameters must"
" be specified for PAPR PHB, not both\n");
return -1;
}
sphb->buid = SPAPR_PCI_BASE_BUID + sphb->index;
sphb->dma_liobn = SPAPR_PCI_BASE_LIOBN + sphb->index;
windows_base = SPAPR_PCI_WINDOW_BASE
+ sphb->index * SPAPR_PCI_WINDOW_SPACING;
sphb->mem_win_addr = windows_base + SPAPR_PCI_MMIO_WIN_OFF;
sphb->io_win_addr = windows_base + SPAPR_PCI_IO_WIN_OFF;
sphb->msi_win_addr = windows_base + SPAPR_PCI_MSI_WIN_OFF;
}
if (sphb->buid == -1) {
fprintf(stderr, "BUID not specified for PHB\n");
return -1;
}
if (sphb->dma_liobn == -1) {
fprintf(stderr, "LIOBN not specified for PHB\n");
return -1;
}
if (sphb->mem_win_addr == -1) {
fprintf(stderr, "Memory window address not specified for PHB\n");
return -1;
}
if (sphb->io_win_addr == -1) {
fprintf(stderr, "IO window address not specified for PHB\n");
return -1;
}
if (sphb->msi_win_addr == -1) {
fprintf(stderr, "MSI window address not specified for PHB\n");
return -1;
}
if (find_phb(spapr, sphb->buid)) {
fprintf(stderr, "PCI host bridges must have unique BUIDs\n");
return -1;
}
sphb->dtbusname = g_strdup_printf("pci@%" PRIx64, sphb->buid);
namebuf = alloca(strlen(sphb->dtbusname) + 32);
/* Initialize memory regions */
sprintf(namebuf, "%s.mmio", sphb->dtbusname);
memory_region_init(&sphb->memspace, namebuf, INT64_MAX);
sprintf(namebuf, "%s.mmio-alias", sphb->dtbusname);
memory_region_init_alias(&sphb->memwindow, namebuf, &sphb->memspace,
SPAPR_PCI_MEM_WIN_BUS_OFFSET, sphb->mem_win_size);
memory_region_add_subregion(get_system_memory(), sphb->mem_win_addr,
&sphb->memwindow);
/* On ppc, we only have MMIO no specific IO space from the CPU
* perspective. In theory we ought to be able to embed the PCI IO
* memory region direction in the system memory space. However,
* if any of the IO BAR subregions use the old_portio mechanism,
* that won't be processed properly unless accessed from the
* system io address space. This hack to bounce things via
* system_io works around the problem until all the users of
* old_portion are updated */
sprintf(namebuf, "%s.io", sphb->dtbusname);
memory_region_init(&sphb->iospace, namebuf, SPAPR_PCI_IO_WIN_SIZE);
/* FIXME: fix to support multiple PHBs */
memory_region_add_subregion(get_system_io(), 0, &sphb->iospace);
sprintf(namebuf, "%s.io-alias", sphb->dtbusname);
memory_region_init_io(&sphb->iowindow, &spapr_io_ops, sphb,
namebuf, SPAPR_PCI_IO_WIN_SIZE);
memory_region_add_subregion(get_system_memory(), sphb->io_win_addr,
&sphb->iowindow);
/* As MSI/MSIX interrupts trigger by writing at MSI/MSIX vectors,
* we need to allocate some memory to catch those writes coming
* from msi_notify()/msix_notify() */
if (msi_supported) {
sprintf(namebuf, "%s.msi", sphb->dtbusname);
memory_region_init_io(&sphb->msiwindow, &spapr_msi_ops, sphb,
namebuf, SPAPR_MSIX_MAX_DEVS * 0x10000);
memory_region_add_subregion(get_system_memory(), sphb->msi_win_addr,
&sphb->msiwindow);
}
/*
* Selecting a busname is more complex than you'd think, due to
* interacting constraints. If the user has specified an id
* explicitly for the phb , then we want to use the qdev default
* of naming the bus based on the bridge device (so the user can
* then assign devices to it in the way they expect). For the
* first / default PCI bus (index=0) we want to use just "pci"
* because libvirt expects there to be a bus called, simply,
* "pci". Otherwise, we use the same name as in the device tree,
* since it's unique by construction, and makes the guest visible
* BUID clear.
*/
if (s->qdev.id) {
busname = NULL;
} else if (sphb->index == 0) {
busname = "pci";
} else {
busname = sphb->dtbusname;
}
bus = pci_register_bus(DEVICE(s), busname,
pci_spapr_set_irq, pci_spapr_map_irq, sphb,
&sphb->memspace, &sphb->iospace,
PCI_DEVFN(0, 0), PCI_NUM_PINS, TYPE_PCI_BUS);
phb->bus = bus;
sphb->dma_window_start = 0;
sphb->dma_window_size = 0x40000000;
sphb->dma = spapr_tce_new_dma_context(sphb->dma_liobn, sphb->dma_window_size);
if (!sphb->dma) {
fprintf(stderr, "Unable to create TCE table for %s\n", sphb->dtbusname);
return -1;
}
pci_setup_iommu(bus, spapr_pci_dma_context_fn, sphb);
QLIST_INSERT_HEAD(&spapr->phbs, sphb, list);
/* Initialize the LSI table */
for (i = 0; i < PCI_NUM_PINS; i++) {
uint32_t irq;
irq = spapr_allocate_lsi(0);
if (!irq) {
return -1;
}
sphb->lsi_table[i].irq = irq;
}
return 0;
}
static void spapr_phb_reset(DeviceState *qdev)
{
SysBusDevice *s = SYS_BUS_DEVICE(qdev);
sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(s);
/* Reset the IOMMU state */
spapr_tce_reset(sphb->dma);
}
static Property spapr_phb_properties[] = {
DEFINE_PROP_INT32("index", sPAPRPHBState, index, -1),
DEFINE_PROP_HEX64("buid", sPAPRPHBState, buid, -1),
DEFINE_PROP_HEX32("liobn", sPAPRPHBState, dma_liobn, -1),
DEFINE_PROP_HEX64("mem_win_addr", sPAPRPHBState, mem_win_addr, -1),
DEFINE_PROP_HEX64("mem_win_size", sPAPRPHBState, mem_win_size,
SPAPR_PCI_MMIO_WIN_SIZE),
DEFINE_PROP_HEX64("io_win_addr", sPAPRPHBState, io_win_addr, -1),
DEFINE_PROP_HEX64("io_win_size", sPAPRPHBState, io_win_size,
SPAPR_PCI_IO_WIN_SIZE),
DEFINE_PROP_HEX64("msi_win_addr", sPAPRPHBState, msi_win_addr, -1),
DEFINE_PROP_END_OF_LIST(),
};
static void spapr_phb_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
sdc->init = spapr_phb_init;
dc->props = spapr_phb_properties;
dc->reset = spapr_phb_reset;
}
static const TypeInfo spapr_phb_info = {
.name = TYPE_SPAPR_PCI_HOST_BRIDGE,
.parent = TYPE_PCI_HOST_BRIDGE,
.instance_size = sizeof(sPAPRPHBState),
.class_init = spapr_phb_class_init,
};
PCIHostState *spapr_create_phb(sPAPREnvironment *spapr, int index)
{
DeviceState *dev;
dev = qdev_create(NULL, TYPE_SPAPR_PCI_HOST_BRIDGE);
qdev_prop_set_uint32(dev, "index", index);
qdev_init_nofail(dev);
return PCI_HOST_BRIDGE(dev);
}
/* Macros to operate with address in OF binding to PCI */
#define b_x(x, p, l) (((x) & ((1<<(l))-1)) << (p))
#define b_n(x) b_x((x), 31, 1) /* 0 if relocatable */
#define b_p(x) b_x((x), 30, 1) /* 1 if prefetchable */
#define b_t(x) b_x((x), 29, 1) /* 1 if the address is aliased */
#define b_ss(x) b_x((x), 24, 2) /* the space code */
#define b_bbbbbbbb(x) b_x((x), 16, 8) /* bus number */
#define b_ddddd(x) b_x((x), 11, 5) /* device number */
#define b_fff(x) b_x((x), 8, 3) /* function number */
#define b_rrrrrrrr(x) b_x((x), 0, 8) /* register number */
int spapr_populate_pci_dt(sPAPRPHBState *phb,
uint32_t xics_phandle,
void *fdt)
{
int bus_off, i, j;
char nodename[256];
uint32_t bus_range[] = { cpu_to_be32(0), cpu_to_be32(0xff) };
struct {
uint32_t hi;
uint64_t child;
uint64_t parent;
uint64_t size;
} QEMU_PACKED ranges[] = {
{
cpu_to_be32(b_ss(1)), cpu_to_be64(0),
cpu_to_be64(phb->io_win_addr),
cpu_to_be64(memory_region_size(&phb->iospace)),
},
{
cpu_to_be32(b_ss(2)), cpu_to_be64(SPAPR_PCI_MEM_WIN_BUS_OFFSET),
cpu_to_be64(phb->mem_win_addr),
cpu_to_be64(memory_region_size(&phb->memwindow)),
},
};
uint64_t bus_reg[] = { cpu_to_be64(phb->buid), 0 };
uint32_t interrupt_map_mask[] = {
cpu_to_be32(b_ddddd(-1)|b_fff(0)), 0x0, 0x0, cpu_to_be32(-1)};
uint32_t interrupt_map[PCI_SLOT_MAX * PCI_NUM_PINS][7];
/* Start populating the FDT */
sprintf(nodename, "pci@%" PRIx64, phb->buid);
bus_off = fdt_add_subnode(fdt, 0, nodename);
if (bus_off < 0) {
return bus_off;
}
#define _FDT(exp) \
do { \
int ret = (exp); \
if (ret < 0) { \
return ret; \
} \
} while (0)
/* Write PHB properties */
_FDT(fdt_setprop_string(fdt, bus_off, "device_type", "pci"));
_FDT(fdt_setprop_string(fdt, bus_off, "compatible", "IBM,Logical_PHB"));
_FDT(fdt_setprop_cell(fdt, bus_off, "#address-cells", 0x3));
_FDT(fdt_setprop_cell(fdt, bus_off, "#size-cells", 0x2));
_FDT(fdt_setprop_cell(fdt, bus_off, "#interrupt-cells", 0x1));
_FDT(fdt_setprop(fdt, bus_off, "used-by-rtas", NULL, 0));
_FDT(fdt_setprop(fdt, bus_off, "bus-range", &bus_range, sizeof(bus_range)));
_FDT(fdt_setprop(fdt, bus_off, "ranges", &ranges, sizeof(ranges)));
_FDT(fdt_setprop(fdt, bus_off, "reg", &bus_reg, sizeof(bus_reg)));
_FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pci-config-space-type", 0x1));
/* Build the interrupt-map, this must matches what is done
* in pci_spapr_map_irq
*/
_FDT(fdt_setprop(fdt, bus_off, "interrupt-map-mask",
&interrupt_map_mask, sizeof(interrupt_map_mask)));
for (i = 0; i < PCI_SLOT_MAX; i++) {
for (j = 0; j < PCI_NUM_PINS; j++) {
uint32_t *irqmap = interrupt_map[i*PCI_NUM_PINS + j];
int lsi_num = pci_spapr_swizzle(i, j);
irqmap[0] = cpu_to_be32(b_ddddd(i)|b_fff(0));
irqmap[1] = 0;
irqmap[2] = 0;
irqmap[3] = cpu_to_be32(j+1);
irqmap[4] = cpu_to_be32(xics_phandle);
irqmap[5] = cpu_to_be32(phb->lsi_table[lsi_num].irq);
irqmap[6] = cpu_to_be32(0x8);
}
}
/* Write interrupt map */
_FDT(fdt_setprop(fdt, bus_off, "interrupt-map", &interrupt_map,
sizeof(interrupt_map)));
spapr_dma_dt(fdt, bus_off, "ibm,dma-window",
phb->dma_liobn, phb->dma_window_start,
phb->dma_window_size);
return 0;
}
void spapr_pci_rtas_init(void)
{
spapr_rtas_register("read-pci-config", rtas_read_pci_config);
spapr_rtas_register("write-pci-config", rtas_write_pci_config);
spapr_rtas_register("ibm,read-pci-config", rtas_ibm_read_pci_config);
spapr_rtas_register("ibm,write-pci-config", rtas_ibm_write_pci_config);
if (msi_supported) {
spapr_rtas_register("ibm,query-interrupt-source-number",
rtas_ibm_query_interrupt_source_number);
spapr_rtas_register("ibm,change-msi", rtas_ibm_change_msi);
}
}
static void spapr_pci_register_types(void)
{
type_register_static(&spapr_phb_info);
}
type_init(spapr_pci_register_types)
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