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qemu/hw/pci.c
David Gibson 5fa45de562 iommu: Allow PCI to use IOMMU infrastructure 
This patch adds some hooks to let PCI devices and busses use the new IOMMU
infrastructure.  When IOMMU support is enabled, each PCI device now
contains a DMAContext * which is used by the pci_dma_*() wrapper functions.

By default, the contexts are initialized to NULL, assuming no IOMMU.
However the platform or host bridge code which sets up the PCI bus can use
pci_setup_iommu() to set a function which will determine the correct
DMAContext for a given PCI device.

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-06-27 16:33:26 -05:00

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/*
* QEMU PCI bus manager
*
* Copyright (c) 2004 Fabrice Bellard
*
* 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.h"
#include "pci.h"
#include "pci_bridge.h"
#include "pci_internals.h"
#include "monitor.h"
#include "net.h"
#include "sysemu.h"
#include "loader.h"
#include "range.h"
#include "qmp-commands.h"
#include "msi.h"
#include "msix.h"
//#define DEBUG_PCI
#ifdef DEBUG_PCI
# define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
#else
# define PCI_DPRINTF(format, ...) do { } while (0)
#endif
static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent);
static char *pcibus_get_dev_path(DeviceState *dev);
static char *pcibus_get_fw_dev_path(DeviceState *dev);
static int pcibus_reset(BusState *qbus);
static Property pci_props[] = {
DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1),
DEFINE_PROP_STRING("romfile", PCIDevice, romfile),
DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1),
DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present,
QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false),
DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present,
QEMU_PCI_CAP_SERR_BITNR, true),
DEFINE_PROP_END_OF_LIST()
};
static void pci_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *k = BUS_CLASS(klass);
k->print_dev = pcibus_dev_print;
k->get_dev_path = pcibus_get_dev_path;
k->get_fw_dev_path = pcibus_get_fw_dev_path;
k->reset = pcibus_reset;
}
static const TypeInfo pci_bus_info = {
.name = TYPE_PCI_BUS,
.parent = TYPE_BUS,
.instance_size = sizeof(PCIBus),
.class_init = pci_bus_class_init,
};
static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num);
static void pci_update_mappings(PCIDevice *d);
static void pci_set_irq(void *opaque, int irq_num, int level);
static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom);
static void pci_del_option_rom(PCIDevice *pdev);
static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET;
static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU;
struct PCIHostBus {
int domain;
struct PCIBus *bus;
QLIST_ENTRY(PCIHostBus) next;
};
static QLIST_HEAD(, PCIHostBus) host_buses;
static const VMStateDescription vmstate_pcibus = {
.name = "PCIBUS",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_INT32_EQUAL(nirq, PCIBus),
VMSTATE_VARRAY_INT32(irq_count, PCIBus, nirq, 0, vmstate_info_int32, int32_t),
VMSTATE_END_OF_LIST()
}
};
static int pci_bar(PCIDevice *d, int reg)
{
uint8_t type;
if (reg != PCI_ROM_SLOT)
return PCI_BASE_ADDRESS_0 + reg * 4;
type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
}
static inline int pci_irq_state(PCIDevice *d, int irq_num)
{
return (d->irq_state >> irq_num) & 0x1;
}
static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level)
{
d->irq_state &= ~(0x1 << irq_num);
d->irq_state |= level << irq_num;
}
static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change)
{
PCIBus *bus;
for (;;) {
bus = pci_dev->bus;
irq_num = bus->map_irq(pci_dev, irq_num);
if (bus->set_irq)
break;
pci_dev = bus->parent_dev;
}
bus->irq_count[irq_num] += change;
bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
}
int pci_bus_get_irq_level(PCIBus *bus, int irq_num)
{
assert(irq_num >= 0);
assert(irq_num < bus->nirq);
return !!bus->irq_count[irq_num];
}
/* Update interrupt status bit in config space on interrupt
* state change. */
static void pci_update_irq_status(PCIDevice *dev)
{
if (dev->irq_state) {
dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT;
} else {
dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
}
}
void pci_device_deassert_intx(PCIDevice *dev)
{
int i;
for (i = 0; i < PCI_NUM_PINS; ++i) {
qemu_set_irq(dev->irq[i], 0);
}
}
/*
* This function is called on #RST and FLR.
* FLR if PCI_EXP_DEVCTL_BCR_FLR is set
*/
void pci_device_reset(PCIDevice *dev)
{
int r;
qdev_reset_all(&dev->qdev);
dev->irq_state = 0;
pci_update_irq_status(dev);
pci_device_deassert_intx(dev);
/* Clear all writable bits */
pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
pci_get_word(dev->wmask + PCI_COMMAND) |
pci_get_word(dev->w1cmask + PCI_COMMAND));
pci_word_test_and_clear_mask(dev->config + PCI_STATUS,
pci_get_word(dev->wmask + PCI_STATUS) |
pci_get_word(dev->w1cmask + PCI_STATUS));
dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
dev->config[PCI_INTERRUPT_LINE] = 0x0;
for (r = 0; r < PCI_NUM_REGIONS; ++r) {
PCIIORegion *region = &dev->io_regions[r];
if (!region->size) {
continue;
}
if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) &&
region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
pci_set_quad(dev->config + pci_bar(dev, r), region->type);
} else {
pci_set_long(dev->config + pci_bar(dev, r), region->type);
}
}
pci_update_mappings(dev);
msi_reset(dev);
msix_reset(dev);
}
/*
* Trigger pci bus reset under a given bus.
* To be called on RST# assert.
*/
void pci_bus_reset(PCIBus *bus)
{
int i;
for (i = 0; i < bus->nirq; i++) {
bus->irq_count[i] = 0;
}
for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
if (bus->devices[i]) {
pci_device_reset(bus->devices[i]);
}
}
}
static int pcibus_reset(BusState *qbus)
{
pci_bus_reset(DO_UPCAST(PCIBus, qbus, qbus));
/* topology traverse is done by pci_bus_reset().
Tell qbus/qdev walker not to traverse the tree */
return 1;
}
static void pci_host_bus_register(int domain, PCIBus *bus)
{
struct PCIHostBus *host;
host = g_malloc0(sizeof(*host));
host->domain = domain;
host->bus = bus;
QLIST_INSERT_HEAD(&host_buses, host, next);
}
PCIBus *pci_find_root_bus(int domain)
{
struct PCIHostBus *host;
QLIST_FOREACH(host, &host_buses, next) {
if (host->domain == domain) {
return host->bus;
}
}
return NULL;
}
int pci_find_domain(const PCIBus *bus)
{
PCIDevice *d;
struct PCIHostBus *host;
/* obtain root bus */
while ((d = bus->parent_dev) != NULL) {
bus = d->bus;
}
QLIST_FOREACH(host, &host_buses, next) {
if (host->bus == bus) {
return host->domain;
}
}
abort(); /* should not be reached */
return -1;
}
void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
const char *name,
MemoryRegion *address_space_mem,
MemoryRegion *address_space_io,
uint8_t devfn_min)
{
qbus_create_inplace(&bus->qbus, TYPE_PCI_BUS, parent, name);
assert(PCI_FUNC(devfn_min) == 0);
bus->devfn_min = devfn_min;
bus->address_space_mem = address_space_mem;
bus->address_space_io = address_space_io;
/* host bridge */
QLIST_INIT(&bus->child);
pci_host_bus_register(0, bus); /* for now only pci domain 0 is supported */
vmstate_register(NULL, -1, &vmstate_pcibus, bus);
}
PCIBus *pci_bus_new(DeviceState *parent, const char *name,
MemoryRegion *address_space_mem,
MemoryRegion *address_space_io,
uint8_t devfn_min)
{
PCIBus *bus;
bus = g_malloc0(sizeof(*bus));
bus->qbus.glib_allocated = true;
pci_bus_new_inplace(bus, parent, name, address_space_mem,
address_space_io, devfn_min);
return bus;
}
void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *irq_opaque, int nirq)
{
bus->set_irq = set_irq;
bus->map_irq = map_irq;
bus->irq_opaque = irq_opaque;
bus->nirq = nirq;
bus->irq_count = g_malloc0(nirq * sizeof(bus->irq_count[0]));
}
void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *qdev)
{
bus->qbus.allow_hotplug = 1;
bus->hotplug = hotplug;
bus->hotplug_qdev = qdev;
}
PCIBus *pci_register_bus(DeviceState *parent, const char *name,
pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *irq_opaque,
MemoryRegion *address_space_mem,
MemoryRegion *address_space_io,
uint8_t devfn_min, int nirq)
{
PCIBus *bus;
bus = pci_bus_new(parent, name, address_space_mem,
address_space_io, devfn_min);
pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq);
return bus;
}
int pci_bus_num(PCIBus *s)
{
if (!s->parent_dev)
return 0; /* pci host bridge */
return s->parent_dev->config[PCI_SECONDARY_BUS];
}
static int get_pci_config_device(QEMUFile *f, void *pv, size_t size)
{
PCIDevice *s = container_of(pv, PCIDevice, config);
uint8_t *config;
int i;
assert(size == pci_config_size(s));
config = g_malloc(size);
qemu_get_buffer(f, config, size);
for (i = 0; i < size; ++i) {
if ((config[i] ^ s->config[i]) &
s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) {
g_free(config);
return -EINVAL;
}
}
memcpy(s->config, config, size);
pci_update_mappings(s);
g_free(config);
return 0;
}
/* just put buffer */
static void put_pci_config_device(QEMUFile *f, void *pv, size_t size)
{
const uint8_t **v = pv;
assert(size == pci_config_size(container_of(pv, PCIDevice, config)));
qemu_put_buffer(f, *v, size);
}
static VMStateInfo vmstate_info_pci_config = {
.name = "pci config",
.get = get_pci_config_device,
.put = put_pci_config_device,
};
static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size)
{
PCIDevice *s = container_of(pv, PCIDevice, irq_state);
uint32_t irq_state[PCI_NUM_PINS];
int i;
for (i = 0; i < PCI_NUM_PINS; ++i) {
irq_state[i] = qemu_get_be32(f);
if (irq_state[i] != 0x1 && irq_state[i] != 0) {
fprintf(stderr, "irq state %d: must be 0 or 1.\n",
irq_state[i]);
return -EINVAL;
}
}
for (i = 0; i < PCI_NUM_PINS; ++i) {
pci_set_irq_state(s, i, irq_state[i]);
}
return 0;
}
static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size)
{
int i;
PCIDevice *s = container_of(pv, PCIDevice, irq_state);
for (i = 0; i < PCI_NUM_PINS; ++i) {
qemu_put_be32(f, pci_irq_state(s, i));
}
}
static VMStateInfo vmstate_info_pci_irq_state = {
.name = "pci irq state",
.get = get_pci_irq_state,
.put = put_pci_irq_state,
};
const VMStateDescription vmstate_pci_device = {
.name = "PCIDevice",
.version_id = 2,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_INT32_LE(version_id, PCIDevice),
VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
vmstate_info_pci_config,
PCI_CONFIG_SPACE_SIZE),
VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
vmstate_info_pci_irq_state,
PCI_NUM_PINS * sizeof(int32_t)),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_pcie_device = {
.name = "PCIDevice",
.version_id = 2,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_INT32_LE(version_id, PCIDevice),
VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
vmstate_info_pci_config,
PCIE_CONFIG_SPACE_SIZE),
VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
vmstate_info_pci_irq_state,
PCI_NUM_PINS * sizeof(int32_t)),
VMSTATE_END_OF_LIST()
}
};
static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s)
{
return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device;
}
void pci_device_save(PCIDevice *s, QEMUFile *f)
{
/* Clear interrupt status bit: it is implicit
* in irq_state which we are saving.
* This makes us compatible with old devices
* which never set or clear this bit. */
s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
vmstate_save_state(f, pci_get_vmstate(s), s);
/* Restore the interrupt status bit. */
pci_update_irq_status(s);
}
int pci_device_load(PCIDevice *s, QEMUFile *f)
{
int ret;
ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id);
/* Restore the interrupt status bit. */
pci_update_irq_status(s);
return ret;
}
static void pci_set_default_subsystem_id(PCIDevice *pci_dev)
{
pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
pci_default_sub_vendor_id);
pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
pci_default_sub_device_id);
}
/*
* Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
* [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
*/
static int pci_parse_devaddr(const char *addr, int *domp, int *busp,
unsigned int *slotp, unsigned int *funcp)
{
const char *p;
char *e;
unsigned long val;
unsigned long dom = 0, bus = 0;
unsigned int slot = 0;
unsigned int func = 0;
p = addr;
val = strtoul(p, &e, 16);
if (e == p)
return -1;
if (*e == ':') {
bus = val;
p = e + 1;
val = strtoul(p, &e, 16);
if (e == p)
return -1;
if (*e == ':') {
dom = bus;
bus = val;
p = e + 1;
val = strtoul(p, &e, 16);
if (e == p)
return -1;
}
}
slot = val;
if (funcp != NULL) {
if (*e != '.')
return -1;
p = e + 1;
val = strtoul(p, &e, 16);
if (e == p)
return -1;
func = val;
}
/* if funcp == NULL func is 0 */
if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7)
return -1;
if (*e)
return -1;
*domp = dom;
*busp = bus;
*slotp = slot;
if (funcp != NULL)
*funcp = func;
return 0;
}
int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
unsigned *slotp)
{
/* strip legacy tag */
if (!strncmp(addr, "pci_addr=", 9)) {
addr += 9;
}
if (pci_parse_devaddr(addr, domp, busp, slotp, NULL)) {
monitor_printf(mon, "Invalid pci address\n");
return -1;
}
return 0;
}
PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
{
int dom, bus;
unsigned slot;
if (!devaddr) {
*devfnp = -1;
return pci_find_bus_nr(pci_find_root_bus(0), 0);
}
if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) {
return NULL;
}
*devfnp = PCI_DEVFN(slot, 0);
return pci_find_bus_nr(pci_find_root_bus(dom), bus);
}
static void pci_init_cmask(PCIDevice *dev)
{
pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff);
pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff);
dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST;
dev->cmask[PCI_REVISION_ID] = 0xff;
dev->cmask[PCI_CLASS_PROG] = 0xff;
pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff);
dev->cmask[PCI_HEADER_TYPE] = 0xff;
dev->cmask[PCI_CAPABILITY_LIST] = 0xff;
}
static void pci_init_wmask(PCIDevice *dev)
{
int config_size = pci_config_size(dev);
dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff;
dev->wmask[PCI_INTERRUPT_LINE] = 0xff;
pci_set_word(dev->wmask + PCI_COMMAND,
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
PCI_COMMAND_INTX_DISABLE);
if (dev->cap_present & QEMU_PCI_CAP_SERR) {
pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR);
}
memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff,
config_size - PCI_CONFIG_HEADER_SIZE);
}
static void pci_init_w1cmask(PCIDevice *dev)
{
/*
* Note: It's okay to set w1cmask even for readonly bits as
* long as their value is hardwired to 0.
*/
pci_set_word(dev->w1cmask + PCI_STATUS,
PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY);
}
static void pci_init_mask_bridge(PCIDevice *d)
{
/* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and
PCI_SEC_LETENCY_TIMER */
memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4);
/* base and limit */
d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff;
d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff;
pci_set_word(d->wmask + PCI_MEMORY_BASE,
PCI_MEMORY_RANGE_MASK & 0xffff);
pci_set_word(d->wmask + PCI_MEMORY_LIMIT,
PCI_MEMORY_RANGE_MASK & 0xffff);
pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE,
PCI_PREF_RANGE_MASK & 0xffff);
pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT,
PCI_PREF_RANGE_MASK & 0xffff);
/* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */
memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8);
/* Supported memory and i/o types */
d->config[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_16;
d->config[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_16;
pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE,
PCI_PREF_RANGE_TYPE_64);
pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT,
PCI_PREF_RANGE_TYPE_64);
/* TODO: add this define to pci_regs.h in linux and then in qemu. */
#define PCI_BRIDGE_CTL_VGA_16BIT 0x10 /* VGA 16-bit decode */
#define PCI_BRIDGE_CTL_DISCARD 0x100 /* Primary discard timer */
#define PCI_BRIDGE_CTL_SEC_DISCARD 0x200 /* Secondary discard timer */
#define PCI_BRIDGE_CTL_DISCARD_STATUS 0x400 /* Discard timer status */
#define PCI_BRIDGE_CTL_DISCARD_SERR 0x800 /* Discard timer SERR# enable */
pci_set_word(d->wmask + PCI_BRIDGE_CONTROL,
PCI_BRIDGE_CTL_PARITY |
PCI_BRIDGE_CTL_SERR |
PCI_BRIDGE_CTL_ISA |
PCI_BRIDGE_CTL_VGA |
PCI_BRIDGE_CTL_VGA_16BIT |
PCI_BRIDGE_CTL_MASTER_ABORT |
PCI_BRIDGE_CTL_BUS_RESET |
PCI_BRIDGE_CTL_FAST_BACK |
PCI_BRIDGE_CTL_DISCARD |
PCI_BRIDGE_CTL_SEC_DISCARD |
PCI_BRIDGE_CTL_DISCARD_SERR);
/* Below does not do anything as we never set this bit, put here for
* completeness. */
pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL,
PCI_BRIDGE_CTL_DISCARD_STATUS);
d->cmask[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_MASK;
d->cmask[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_MASK;
pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_BASE,
PCI_PREF_RANGE_TYPE_MASK);
pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_LIMIT,
PCI_PREF_RANGE_TYPE_MASK);
}
static int pci_init_multifunction(PCIBus *bus, PCIDevice *dev)
{
uint8_t slot = PCI_SLOT(dev->devfn);
uint8_t func;
if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
}
/*
* multifunction bit is interpreted in two ways as follows.
* - all functions must set the bit to 1.
* Example: Intel X53
* - function 0 must set the bit, but the rest function (> 0)
* is allowed to leave the bit to 0.
* Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10,
*
* So OS (at least Linux) checks the bit of only function 0,
* and doesn't see the bit of function > 0.
*
* The below check allows both interpretation.
*/
if (PCI_FUNC(dev->devfn)) {
PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)];
if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) {
/* function 0 should set multifunction bit */
error_report("PCI: single function device can't be populated "
"in function %x.%x", slot, PCI_FUNC(dev->devfn));
return -1;
}
return 0;
}
if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
return 0;
}
/* function 0 indicates single function, so function > 0 must be NULL */
for (func = 1; func < PCI_FUNC_MAX; ++func) {
if (bus->devices[PCI_DEVFN(slot, func)]) {
error_report("PCI: %x.0 indicates single function, "
"but %x.%x is already populated.",
slot, slot, func);
return -1;
}
}
return 0;
}
static void pci_config_alloc(PCIDevice *pci_dev)
{
int config_size = pci_config_size(pci_dev);
pci_dev->config = g_malloc0(config_size);
pci_dev->cmask = g_malloc0(config_size);
pci_dev->wmask = g_malloc0(config_size);
pci_dev->w1cmask = g_malloc0(config_size);
pci_dev->used = g_malloc0(config_size);
}
static void pci_config_free(PCIDevice *pci_dev)
{
g_free(pci_dev->config);
g_free(pci_dev->cmask);
g_free(pci_dev->wmask);
g_free(pci_dev->w1cmask);
g_free(pci_dev->used);
}
/* -1 for devfn means auto assign */
static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
const char *name, int devfn)
{
PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
PCIConfigReadFunc *config_read = pc->config_read;
PCIConfigWriteFunc *config_write = pc->config_write;
if (devfn < 0) {
for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices);
devfn += PCI_FUNC_MAX) {
if (!bus->devices[devfn])
goto found;
}
error_report("PCI: no slot/function available for %s, all in use", name);
return NULL;
found: ;
} else if (bus->devices[devfn]) {
error_report("PCI: slot %d function %d not available for %s, in use by %s",
PCI_SLOT(devfn), PCI_FUNC(devfn), name, bus->devices[devfn]->name);
return NULL;
}
pci_dev->bus = bus;
if (bus->dma_context_fn) {
pci_dev->dma = bus->dma_context_fn(bus, bus->dma_context_opaque, devfn);
}
pci_dev->devfn = devfn;
pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
pci_dev->irq_state = 0;
pci_config_alloc(pci_dev);
pci_config_set_vendor_id(pci_dev->config, pc->vendor_id);
pci_config_set_device_id(pci_dev->config, pc->device_id);
pci_config_set_revision(pci_dev->config, pc->revision);
pci_config_set_class(pci_dev->config, pc->class_id);
if (!pc->is_bridge) {
if (pc->subsystem_vendor_id || pc->subsystem_id) {
pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
pc->subsystem_vendor_id);
pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
pc->subsystem_id);
} else {
pci_set_default_subsystem_id(pci_dev);
}
} else {
/* subsystem_vendor_id/subsystem_id are only for header type 0 */
assert(!pc->subsystem_vendor_id);
assert(!pc->subsystem_id);
}
pci_init_cmask(pci_dev);
pci_init_wmask(pci_dev);
pci_init_w1cmask(pci_dev);
if (pc->is_bridge) {
pci_init_mask_bridge(pci_dev);
}
if (pci_init_multifunction(bus, pci_dev)) {
pci_config_free(pci_dev);
return NULL;
}
if (!config_read)
config_read = pci_default_read_config;
if (!config_write)
config_write = pci_default_write_config;
pci_dev->config_read = config_read;
pci_dev->config_write = config_write;
bus->devices[devfn] = pci_dev;
pci_dev->irq = qemu_allocate_irqs(pci_set_irq, pci_dev, PCI_NUM_PINS);
pci_dev->version_id = 2; /* Current pci device vmstate version */
return pci_dev;
}
static void do_pci_unregister_device(PCIDevice *pci_dev)
{
qemu_free_irqs(pci_dev->irq);
pci_dev->bus->devices[pci_dev->devfn] = NULL;
pci_config_free(pci_dev);
}
static void pci_unregister_io_regions(PCIDevice *pci_dev)
{
PCIIORegion *r;
int i;
for(i = 0; i < PCI_NUM_REGIONS; i++) {
r = &pci_dev->io_regions[i];
if (!r->size || r->addr == PCI_BAR_UNMAPPED)
continue;
memory_region_del_subregion(r->address_space, r->memory);
}
}
static int pci_unregister_device(DeviceState *dev)
{
PCIDevice *pci_dev = PCI_DEVICE(dev);
PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
int ret = 0;
if (pc->exit)
ret = pc->exit(pci_dev);
if (ret)
return ret;
pci_unregister_io_regions(pci_dev);
pci_del_option_rom(pci_dev);
do_pci_unregister_device(pci_dev);
return 0;
}
void pci_register_bar(PCIDevice *pci_dev, int region_num,
uint8_t type, MemoryRegion *memory)
{
PCIIORegion *r;
uint32_t addr;
uint64_t wmask;
pcibus_t size = memory_region_size(memory);
assert(region_num >= 0);
assert(region_num < PCI_NUM_REGIONS);
if (size & (size-1)) {
fprintf(stderr, "ERROR: PCI region size must be pow2 "
"type=0x%x, size=0x%"FMT_PCIBUS"\n", type, size);
exit(1);
}
r = &pci_dev->io_regions[region_num];
r->addr = PCI_BAR_UNMAPPED;
r->size = size;
r->type = type;
r->memory = NULL;
wmask = ~(size - 1);
addr = pci_bar(pci_dev, region_num);
if (region_num == PCI_ROM_SLOT) {
/* ROM enable bit is writable */
wmask |= PCI_ROM_ADDRESS_ENABLE;
}
pci_set_long(pci_dev->config + addr, type);
if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) &&
r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
pci_set_quad(pci_dev->wmask + addr, wmask);
pci_set_quad(pci_dev->cmask + addr, ~0ULL);
} else {
pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff);
pci_set_long(pci_dev->cmask + addr, 0xffffffff);
}
pci_dev->io_regions[region_num].memory = memory;
pci_dev->io_regions[region_num].address_space
= type & PCI_BASE_ADDRESS_SPACE_IO
? pci_dev->bus->address_space_io
: pci_dev->bus->address_space_mem;
}
pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num)
{
return pci_dev->io_regions[region_num].addr;
}
static pcibus_t pci_bar_address(PCIDevice *d,
int reg, uint8_t type, pcibus_t size)
{
pcibus_t new_addr, last_addr;
int bar = pci_bar(d, reg);
uint16_t cmd = pci_get_word(d->config + PCI_COMMAND);
if (type & PCI_BASE_ADDRESS_SPACE_IO) {
if (!(cmd & PCI_COMMAND_IO)) {
return PCI_BAR_UNMAPPED;
}
new_addr = pci_get_long(d->config + bar) & ~(size - 1);
last_addr = new_addr + size - 1;
/* NOTE: we have only 64K ioports on PC */
if (last_addr <= new_addr || new_addr == 0 || last_addr > UINT16_MAX) {
return PCI_BAR_UNMAPPED;
}
return new_addr;
}
if (!(cmd & PCI_COMMAND_MEMORY)) {
return PCI_BAR_UNMAPPED;
}
if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
new_addr = pci_get_quad(d->config + bar);
} else {
new_addr = pci_get_long(d->config + bar);
}
/* the ROM slot has a specific enable bit */
if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) {
return PCI_BAR_UNMAPPED;
}
new_addr &= ~(size - 1);
last_addr = new_addr + size - 1;
/* NOTE: we do not support wrapping */
/* XXX: as we cannot support really dynamic
mappings, we handle specific values as invalid
mappings. */
if (last_addr <= new_addr || new_addr == 0 ||
last_addr == PCI_BAR_UNMAPPED) {
return PCI_BAR_UNMAPPED;
}
/* Now pcibus_t is 64bit.
* Check if 32 bit BAR wraps around explicitly.
* Without this, PC ide doesn't work well.
* TODO: remove this work around.
*/
if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) {
return PCI_BAR_UNMAPPED;
}
/*
* OS is allowed to set BAR beyond its addressable
* bits. For example, 32 bit OS can set 64bit bar
* to >4G. Check it. TODO: we might need to support
* it in the future for e.g. PAE.
*/
if (last_addr >= TARGET_PHYS_ADDR_MAX) {
return PCI_BAR_UNMAPPED;
}
return new_addr;
}
static void pci_update_mappings(PCIDevice *d)
{
PCIIORegion *r;
int i;
pcibus_t new_addr;
for(i = 0; i < PCI_NUM_REGIONS; i++) {
r = &d->io_regions[i];
/* this region isn't registered */
if (!r->size)
continue;
new_addr = pci_bar_address(d, i, r->type, r->size);
/* This bar isn't changed */
if (new_addr == r->addr)
continue;
/* now do the real mapping */
if (r->addr != PCI_BAR_UNMAPPED) {
memory_region_del_subregion(r->address_space, r->memory);
}
r->addr = new_addr;
if (r->addr != PCI_BAR_UNMAPPED) {
memory_region_add_subregion_overlap(r->address_space,
r->addr, r->memory, 1);
}
}
}
static inline int pci_irq_disabled(PCIDevice *d)
{
return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE;
}
/* Called after interrupt disabled field update in config space,
* assert/deassert interrupts if necessary.
* Gets original interrupt disable bit value (before update). */
static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled)
{
int i, disabled = pci_irq_disabled(d);
if (disabled == was_irq_disabled)
return;
for (i = 0; i < PCI_NUM_PINS; ++i) {
int state = pci_irq_state(d, i);
pci_change_irq_level(d, i, disabled ? -state : state);
}
}
uint32_t pci_default_read_config(PCIDevice *d,
uint32_t address, int len)
{
uint32_t val = 0;
memcpy(&val, d->config + address, len);
return le32_to_cpu(val);
}
void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
{
int i, was_irq_disabled = pci_irq_disabled(d);
for (i = 0; i < l; val >>= 8, ++i) {
uint8_t wmask = d->wmask[addr + i];
uint8_t w1cmask = d->w1cmask[addr + i];
assert(!(wmask & w1cmask));
d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask);
d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */
}
if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) ||
ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) ||
ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) ||
range_covers_byte(addr, l, PCI_COMMAND))
pci_update_mappings(d);
if (range_covers_byte(addr, l, PCI_COMMAND))
pci_update_irq_disabled(d, was_irq_disabled);
msi_write_config(d, addr, val, l);
msix_write_config(d, addr, val, l);
}
/***********************************************************/
/* generic PCI irq support */
/* 0 <= irq_num <= 3. level must be 0 or 1 */
static void pci_set_irq(void *opaque, int irq_num, int level)
{
PCIDevice *pci_dev = opaque;
int change;
change = level - pci_irq_state(pci_dev, irq_num);
if (!change)
return;
pci_set_irq_state(pci_dev, irq_num, level);
pci_update_irq_status(pci_dev);
if (pci_irq_disabled(pci_dev))
return;
pci_change_irq_level(pci_dev, irq_num, change);
}
/***********************************************************/
/* monitor info on PCI */
typedef struct {
uint16_t class;
const char *desc;
const char *fw_name;
uint16_t fw_ign_bits;
} pci_class_desc;
static const pci_class_desc pci_class_descriptions[] =
{
{ 0x0001, "VGA controller", "display"},
{ 0x0100, "SCSI controller", "scsi"},
{ 0x0101, "IDE controller", "ide"},
{ 0x0102, "Floppy controller", "fdc"},
{ 0x0103, "IPI controller", "ipi"},
{ 0x0104, "RAID controller", "raid"},
{ 0x0106, "SATA controller"},
{ 0x0107, "SAS controller"},
{ 0x0180, "Storage controller"},
{ 0x0200, "Ethernet controller", "ethernet"},
{ 0x0201, "Token Ring controller", "token-ring"},
{ 0x0202, "FDDI controller", "fddi"},
{ 0x0203, "ATM controller", "atm"},
{ 0x0280, "Network controller"},
{ 0x0300, "VGA controller", "display", 0x00ff},
{ 0x0301, "XGA controller"},
{ 0x0302, "3D controller"},
{ 0x0380, "Display controller"},
{ 0x0400, "Video controller", "video"},
{ 0x0401, "Audio controller", "sound"},
{ 0x0402, "Phone"},
{ 0x0403, "Audio controller", "sound"},
{ 0x0480, "Multimedia controller"},
{ 0x0500, "RAM controller", "memory"},
{ 0x0501, "Flash controller", "flash"},
{ 0x0580, "Memory controller"},
{ 0x0600, "Host bridge", "host"},
{ 0x0601, "ISA bridge", "isa"},
{ 0x0602, "EISA bridge", "eisa"},
{ 0x0603, "MC bridge", "mca"},
{ 0x0604, "PCI bridge", "pci"},
{ 0x0605, "PCMCIA bridge", "pcmcia"},
{ 0x0606, "NUBUS bridge", "nubus"},
{ 0x0607, "CARDBUS bridge", "cardbus"},
{ 0x0608, "RACEWAY bridge"},
{ 0x0680, "Bridge"},
{ 0x0700, "Serial port", "serial"},
{ 0x0701, "Parallel port", "parallel"},
{ 0x0800, "Interrupt controller", "interrupt-controller"},
{ 0x0801, "DMA controller", "dma-controller"},
{ 0x0802, "Timer", "timer"},
{ 0x0803, "RTC", "rtc"},
{ 0x0900, "Keyboard", "keyboard"},
{ 0x0901, "Pen", "pen"},
{ 0x0902, "Mouse", "mouse"},
{ 0x0A00, "Dock station", "dock", 0x00ff},
{ 0x0B00, "i386 cpu", "cpu", 0x00ff},
{ 0x0c00, "Fireware contorller", "fireware"},
{ 0x0c01, "Access bus controller", "access-bus"},
{ 0x0c02, "SSA controller", "ssa"},
{ 0x0c03, "USB controller", "usb"},
{ 0x0c04, "Fibre channel controller", "fibre-channel"},
{ 0, NULL}
};
static void pci_for_each_device_under_bus(PCIBus *bus,
void (*fn)(PCIBus *b, PCIDevice *d,
void *opaque),
void *opaque)
{
PCIDevice *d;
int devfn;
for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
d = bus->devices[devfn];
if (d) {
fn(bus, d, opaque);
}
}
}
void pci_for_each_device(PCIBus *bus, int bus_num,
void (*fn)(PCIBus *b, PCIDevice *d, void *opaque),
void *opaque)
{
bus = pci_find_bus_nr(bus, bus_num);
if (bus) {
pci_for_each_device_under_bus(bus, fn, opaque);
}
}
static const pci_class_desc *get_class_desc(int class)
{
const pci_class_desc *desc;
desc = pci_class_descriptions;
while (desc->desc && class != desc->class) {
desc++;
}
return desc;
}
static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num);
static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev)
{
PciMemoryRegionList *head = NULL, *cur_item = NULL;
int i;
for (i = 0; i < PCI_NUM_REGIONS; i++) {
const PCIIORegion *r = &dev->io_regions[i];
PciMemoryRegionList *region;
if (!r->size) {
continue;
}
region = g_malloc0(sizeof(*region));
region->value = g_malloc0(sizeof(*region->value));
if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
region->value->type = g_strdup("io");
} else {
region->value->type = g_strdup("memory");
region->value->has_prefetch = true;
region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH);
region->value->has_mem_type_64 = true;
region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64);
}
region->value->bar = i;
region->value->address = r->addr;
region->value->size = r->size;
/* XXX: waiting for the qapi to support GSList */
if (!cur_item) {
head = cur_item = region;
} else {
cur_item->next = region;
cur_item = region;
}
}
return head;
}
static PciBridgeInfo *qmp_query_pci_bridge(PCIDevice *dev, PCIBus *bus,
int bus_num)
{
PciBridgeInfo *info;
info = g_malloc0(sizeof(*info));
info->bus.number = dev->config[PCI_PRIMARY_BUS];
info->bus.secondary = dev->config[PCI_SECONDARY_BUS];
info->bus.subordinate = dev->config[PCI_SUBORDINATE_BUS];
info->bus.io_range = g_malloc0(sizeof(*info->bus.io_range));
info->bus.io_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO);
info->bus.io_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO);
info->bus.memory_range = g_malloc0(sizeof(*info->bus.memory_range));
info->bus.memory_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
info->bus.memory_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
info->bus.prefetchable_range = g_malloc0(sizeof(*info->bus.prefetchable_range));
info->bus.prefetchable_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
info->bus.prefetchable_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
if (dev->config[PCI_SECONDARY_BUS] != 0) {
PCIBus *child_bus = pci_find_bus_nr(bus, dev->config[PCI_SECONDARY_BUS]);
if (child_bus) {
info->has_devices = true;
info->devices = qmp_query_pci_devices(child_bus, dev->config[PCI_SECONDARY_BUS]);
}
}
return info;
}
static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus,
int bus_num)
{
const pci_class_desc *desc;
PciDeviceInfo *info;
uint8_t type;
int class;
info = g_malloc0(sizeof(*info));
info->bus = bus_num;
info->slot = PCI_SLOT(dev->devfn);
info->function = PCI_FUNC(dev->devfn);
class = pci_get_word(dev->config + PCI_CLASS_DEVICE);
info->class_info.class = class;
desc = get_class_desc(class);
if (desc->desc) {
info->class_info.has_desc = true;
info->class_info.desc = g_strdup(desc->desc);
}
info->id.vendor = pci_get_word(dev->config + PCI_VENDOR_ID);
info->id.device = pci_get_word(dev->config + PCI_DEVICE_ID);
info->regions = qmp_query_pci_regions(dev);
info->qdev_id = g_strdup(dev->qdev.id ? dev->qdev.id : "");
if (dev->config[PCI_INTERRUPT_PIN] != 0) {
info->has_irq = true;
info->irq = dev->config[PCI_INTERRUPT_LINE];
}
type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
if (type == PCI_HEADER_TYPE_BRIDGE) {
info->has_pci_bridge = true;
info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num);
}
return info;
}
static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num)
{
PciDeviceInfoList *info, *head = NULL, *cur_item = NULL;
PCIDevice *dev;
int devfn;
for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
dev = bus->devices[devfn];
if (dev) {
info = g_malloc0(sizeof(*info));
info->value = qmp_query_pci_device(dev, bus, bus_num);
/* XXX: waiting for the qapi to support GSList */
if (!cur_item) {
head = cur_item = info;
} else {
cur_item->next = info;
cur_item = info;
}
}
}
return head;
}
static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num)
{
PciInfo *info = NULL;
bus = pci_find_bus_nr(bus, bus_num);
if (bus) {
info = g_malloc0(sizeof(*info));
info->bus = bus_num;
info->devices = qmp_query_pci_devices(bus, bus_num);
}
return info;
}
PciInfoList *qmp_query_pci(Error **errp)
{
PciInfoList *info, *head = NULL, *cur_item = NULL;
struct PCIHostBus *host;
QLIST_FOREACH(host, &host_buses, next) {
info = g_malloc0(sizeof(*info));
info->value = qmp_query_pci_bus(host->bus, 0);
/* XXX: waiting for the qapi to support GSList */
if (!cur_item) {
head = cur_item = info;
} else {
cur_item->next = info;
cur_item = info;
}
}
return head;
}
static const char * const pci_nic_models[] = {
"ne2k_pci",
"i82551",
"i82557b",
"i82559er",
"rtl8139",
"e1000",
"pcnet",
"virtio",
NULL
};
static const char * const pci_nic_names[] = {
"ne2k_pci",
"i82551",
"i82557b",
"i82559er",
"rtl8139",
"e1000",
"pcnet",
"virtio-net-pci",
NULL
};
/* Initialize a PCI NIC. */
/* FIXME callers should check for failure, but don't */
PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
const char *default_devaddr)
{
const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr;
PCIBus *bus;
int devfn;
PCIDevice *pci_dev;
DeviceState *dev;
int i;
i = qemu_find_nic_model(nd, pci_nic_models, default_model);
if (i < 0)
return NULL;
bus = pci_get_bus_devfn(&devfn, devaddr);
if (!bus) {
error_report("Invalid PCI device address %s for device %s",
devaddr, pci_nic_names[i]);
return NULL;
}
pci_dev = pci_create(bus, devfn, pci_nic_names[i]);
dev = &pci_dev->qdev;
qdev_set_nic_properties(dev, nd);
if (qdev_init(dev) < 0)
return NULL;
return pci_dev;
}
PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
const char *default_devaddr)
{
PCIDevice *res;
if (qemu_show_nic_models(nd->model, pci_nic_models))
exit(0);
res = pci_nic_init(nd, default_model, default_devaddr);
if (!res)
exit(1);
return res;
}
/* Whether a given bus number is in range of the secondary
* bus of the given bridge device. */
static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num)
{
return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) &
PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ &&
dev->config[PCI_SECONDARY_BUS] < bus_num &&
bus_num <= dev->config[PCI_SUBORDINATE_BUS];
}
static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num)
{
PCIBus *sec;
if (!bus) {
return NULL;
}
if (pci_bus_num(bus) == bus_num) {
return bus;
}
/* Consider all bus numbers in range for the host pci bridge. */
if (bus->parent_dev &&
!pci_secondary_bus_in_range(bus->parent_dev, bus_num)) {
return NULL;
}
/* try child bus */
for (; bus; bus = sec) {
QLIST_FOREACH(sec, &bus->child, sibling) {
assert(sec->parent_dev);
if (sec->parent_dev->config[PCI_SECONDARY_BUS] == bus_num) {
return sec;
}
if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) {
break;
}
}
}
return NULL;
}
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
{
bus = pci_find_bus_nr(bus, bus_num);
if (!bus)
return NULL;
return bus->devices[devfn];
}
static int pci_qdev_init(DeviceState *qdev)
{
PCIDevice *pci_dev = (PCIDevice *)qdev;
PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev);
PCIBus *bus;
int rc;
bool is_default_rom;
/* initialize cap_present for pci_is_express() and pci_config_size() */
if (pc->is_express) {
pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
}
bus = FROM_QBUS(PCIBus, qdev_get_parent_bus(qdev));
pci_dev = do_pci_register_device(pci_dev, bus,
object_get_typename(OBJECT(qdev)),
pci_dev->devfn);
if (pci_dev == NULL)
return -1;
if (qdev->hotplugged && pc->no_hotplug) {
qerror_report(QERR_DEVICE_NO_HOTPLUG, object_get_typename(OBJECT(pci_dev)));
do_pci_unregister_device(pci_dev);
return -1;
}
if (pc->init) {
rc = pc->init(pci_dev);
if (rc != 0) {
do_pci_unregister_device(pci_dev);
return rc;
}
}
/* rom loading */
is_default_rom = false;
if (pci_dev->romfile == NULL && pc->romfile != NULL) {
pci_dev->romfile = g_strdup(pc->romfile);
is_default_rom = true;
}
pci_add_option_rom(pci_dev, is_default_rom);
if (bus->hotplug) {
/* Let buses differentiate between hotplug and when device is
* enabled during qemu machine creation. */
rc = bus->hotplug(bus->hotplug_qdev, pci_dev,
qdev->hotplugged ? PCI_HOTPLUG_ENABLED:
PCI_COLDPLUG_ENABLED);
if (rc != 0) {
int r = pci_unregister_device(&pci_dev->qdev);
assert(!r);
return rc;
}
}
return 0;
}
static int pci_unplug_device(DeviceState *qdev)
{
PCIDevice *dev = PCI_DEVICE(qdev);
PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
if (pc->no_hotplug) {
qerror_report(QERR_DEVICE_NO_HOTPLUG, object_get_typename(OBJECT(dev)));
return -1;
}
return dev->bus->hotplug(dev->bus->hotplug_qdev, dev,
PCI_HOTPLUG_DISABLED);
}
PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction,
const char *name)
{
DeviceState *dev;
dev = qdev_create(&bus->qbus, name);
qdev_prop_set_int32(dev, "addr", devfn);
qdev_prop_set_bit(dev, "multifunction", multifunction);
return PCI_DEVICE(dev);
}
PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn,
bool multifunction,
const char *name)
{
PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name);
qdev_init_nofail(&dev->qdev);
return dev;
}
PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name)
{
return pci_create_multifunction(bus, devfn, false, name);
}
PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name)
{
return pci_create_simple_multifunction(bus, devfn, false, name);
}
static int pci_find_space(PCIDevice *pdev, uint8_t size)
{
int config_size = pci_config_size(pdev);
int offset = PCI_CONFIG_HEADER_SIZE;
int i;
for (i = PCI_CONFIG_HEADER_SIZE; i < config_size; ++i)
if (pdev->used[i])
offset = i + 1;
else if (i - offset + 1 == size)
return offset;
return 0;
}
static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id,
uint8_t *prev_p)
{
uint8_t next, prev;
if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST))
return 0;
for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
prev = next + PCI_CAP_LIST_NEXT)
if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id)
break;
if (prev_p)
*prev_p = prev;
return next;
}
static uint8_t pci_find_capability_at_offset(PCIDevice *pdev, uint8_t offset)
{
uint8_t next, prev, found = 0;
if (!(pdev->used[offset])) {
return 0;
}
assert(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST);
for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
prev = next + PCI_CAP_LIST_NEXT) {
if (next <= offset && next > found) {
found = next;
}
}
return found;
}
/* Patch the PCI vendor and device ids in a PCI rom image if necessary.
This is needed for an option rom which is used for more than one device. */
static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size)
{
uint16_t vendor_id;
uint16_t device_id;
uint16_t rom_vendor_id;
uint16_t rom_device_id;
uint16_t rom_magic;
uint16_t pcir_offset;
uint8_t checksum;
/* Words in rom data are little endian (like in PCI configuration),
so they can be read / written with pci_get_word / pci_set_word. */
/* Only a valid rom will be patched. */
rom_magic = pci_get_word(ptr);
if (rom_magic != 0xaa55) {
PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic);
return;
}
pcir_offset = pci_get_word(ptr + 0x18);
if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) {
PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset);
return;
}
vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
rom_vendor_id = pci_get_word(ptr + pcir_offset + 4);
rom_device_id = pci_get_word(ptr + pcir_offset + 6);
PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile,
vendor_id, device_id, rom_vendor_id, rom_device_id);
checksum = ptr[6];
if (vendor_id != rom_vendor_id) {
/* Patch vendor id and checksum (at offset 6 for etherboot roms). */
checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8);
checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8);
PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
ptr[6] = checksum;
pci_set_word(ptr + pcir_offset + 4, vendor_id);
}
if (device_id != rom_device_id) {
/* Patch device id and checksum (at offset 6 for etherboot roms). */
checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8);
checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8);
PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
ptr[6] = checksum;
pci_set_word(ptr + pcir_offset + 6, device_id);
}
}
/* Add an option rom for the device */
static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom)
{
int size;
char *path;
void *ptr;
char name[32];
const VMStateDescription *vmsd;
if (!pdev->romfile)
return 0;
if (strlen(pdev->romfile) == 0)
return 0;
if (!pdev->rom_bar) {
/*
* Load rom via fw_cfg instead of creating a rom bar,
* for 0.11 compatibility.
*/
int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
if (class == 0x0300) {
rom_add_vga(pdev->romfile);
} else {
rom_add_option(pdev->romfile, -1);
}
return 0;
}
path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile);
if (path == NULL) {
path = g_strdup(pdev->romfile);
}
size = get_image_size(path);
if (size < 0) {
error_report("%s: failed to find romfile \"%s\"",
__FUNCTION__, pdev->romfile);
g_free(path);
return -1;
}
if (size & (size - 1)) {
size = 1 << qemu_fls(size);
}
vmsd = qdev_get_vmsd(DEVICE(pdev));
if (vmsd) {
snprintf(name, sizeof(name), "%s.rom", vmsd->name);
} else {
snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev)));
}
pdev->has_rom = true;
memory_region_init_ram(&pdev->rom, name, size);
vmstate_register_ram(&pdev->rom, &pdev->qdev);
ptr = memory_region_get_ram_ptr(&pdev->rom);
load_image(path, ptr);
g_free(path);
if (is_default_rom) {
/* Only the default rom images will be patched (if needed). */
pci_patch_ids(pdev, ptr, size);
}
qemu_put_ram_ptr(ptr);
pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom);
return 0;
}
static void pci_del_option_rom(PCIDevice *pdev)
{
if (!pdev->has_rom)
return;
vmstate_unregister_ram(&pdev->rom, &pdev->qdev);
memory_region_destroy(&pdev->rom);
pdev->has_rom = false;
}
/*
* if !offset
* Reserve space and add capability to the linked list in pci config space
*
* if offset = 0,
* Find and reserve space and add capability to the linked list
* in pci config space */
int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
uint8_t offset, uint8_t size)
{
uint8_t *config;
int i, overlapping_cap;
if (!offset) {
offset = pci_find_space(pdev, size);
if (!offset) {
return -ENOSPC;
}
} else {
/* Verify that capabilities don't overlap. Note: device assignment
* depends on this check to verify that the device is not broken.
* Should never trigger for emulated devices, but it's helpful
* for debugging these. */
for (i = offset; i < offset + size; i++) {
overlapping_cap = pci_find_capability_at_offset(pdev, i);
if (overlapping_cap) {
fprintf(stderr, "ERROR: %04x:%02x:%02x.%x "
"Attempt to add PCI capability %x at offset "
"%x overlaps existing capability %x at offset %x\n",
pci_find_domain(pdev->bus), pci_bus_num(pdev->bus),
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
cap_id, offset, overlapping_cap, i);
return -EINVAL;
}
}
}
config = pdev->config + offset;
config[PCI_CAP_LIST_ID] = cap_id;
config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST];
pdev->config[PCI_CAPABILITY_LIST] = offset;
pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
memset(pdev->used + offset, 0xFF, size);
/* Make capability read-only by default */
memset(pdev->wmask + offset, 0, size);
/* Check capability by default */
memset(pdev->cmask + offset, 0xFF, size);
return offset;
}
/* Unlink capability from the pci config space. */
void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size)
{
uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev);
if (!offset)
return;
pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT];
/* Make capability writable again */
memset(pdev->wmask + offset, 0xff, size);
memset(pdev->w1cmask + offset, 0, size);
/* Clear cmask as device-specific registers can't be checked */
memset(pdev->cmask + offset, 0, size);
memset(pdev->used + offset, 0, size);
if (!pdev->config[PCI_CAPABILITY_LIST])
pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST;
}
uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id)
{
return pci_find_capability_list(pdev, cap_id, NULL);
}
static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent)
{
PCIDevice *d = (PCIDevice *)dev;
const pci_class_desc *desc;
char ctxt[64];
PCIIORegion *r;
int i, class;
class = pci_get_word(d->config + PCI_CLASS_DEVICE);
desc = pci_class_descriptions;
while (desc->desc && class != desc->class)
desc++;
if (desc->desc) {
snprintf(ctxt, sizeof(ctxt), "%s", desc->desc);
} else {
snprintf(ctxt, sizeof(ctxt), "Class %04x", class);
}
monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, "
"pci id %04x:%04x (sub %04x:%04x)\n",
indent, "", ctxt, pci_bus_num(d->bus),
PCI_SLOT(d->devfn), PCI_FUNC(d->devfn),
pci_get_word(d->config + PCI_VENDOR_ID),
pci_get_word(d->config + PCI_DEVICE_ID),
pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID),
pci_get_word(d->config + PCI_SUBSYSTEM_ID));
for (i = 0; i < PCI_NUM_REGIONS; i++) {
r = &d->io_regions[i];
if (!r->size)
continue;
monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS
" [0x%"FMT_PCIBUS"]\n",
indent, "",
i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem",
r->addr, r->addr + r->size - 1);
}
}
static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len)
{
PCIDevice *d = (PCIDevice *)dev;
const char *name = NULL;
const pci_class_desc *desc = pci_class_descriptions;
int class = pci_get_word(d->config + PCI_CLASS_DEVICE);
while (desc->desc &&
(class & ~desc->fw_ign_bits) !=
(desc->class & ~desc->fw_ign_bits)) {
desc++;
}
if (desc->desc) {
name = desc->fw_name;
}
if (name) {
pstrcpy(buf, len, name);
} else {
snprintf(buf, len, "pci%04x,%04x",
pci_get_word(d->config + PCI_VENDOR_ID),
pci_get_word(d->config + PCI_DEVICE_ID));
}
return buf;
}
static char *pcibus_get_fw_dev_path(DeviceState *dev)
{
PCIDevice *d = (PCIDevice *)dev;
char path[50], name[33];
int off;
off = snprintf(path, sizeof(path), "%s@%x",
pci_dev_fw_name(dev, name, sizeof name),
PCI_SLOT(d->devfn));
if (PCI_FUNC(d->devfn))
snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn));
return strdup(path);
}
static char *pcibus_get_dev_path(DeviceState *dev)
{
PCIDevice *d = container_of(dev, PCIDevice, qdev);
PCIDevice *t;
int slot_depth;
/* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function.
* 00 is added here to make this format compatible with
* domain:Bus:Slot.Func for systems without nested PCI bridges.
* Slot.Function list specifies the slot and function numbers for all
* devices on the path from root to the specific device. */
char domain[] = "DDDD:00";
char slot[] = ":SS.F";
int domain_len = sizeof domain - 1 /* For '\0' */;
int slot_len = sizeof slot - 1 /* For '\0' */;
int path_len;
char *path, *p;
int s;
/* Calculate # of slots on path between device and root. */;
slot_depth = 0;
for (t = d; t; t = t->bus->parent_dev) {
++slot_depth;
}
path_len = domain_len + slot_len * slot_depth;
/* Allocate memory, fill in the terminating null byte. */
path = g_malloc(path_len + 1 /* For '\0' */);
path[path_len] = '\0';
/* First field is the domain. */
s = snprintf(domain, sizeof domain, "%04x:00", pci_find_domain(d->bus));
assert(s == domain_len);
memcpy(path, domain, domain_len);
/* Fill in slot numbers. We walk up from device to root, so need to print
* them in the reverse order, last to first. */
p = path + path_len;
for (t = d; t; t = t->bus->parent_dev) {
p -= slot_len;
s = snprintf(slot, sizeof slot, ":%02x.%x",
PCI_SLOT(t->devfn), PCI_FUNC(t->devfn));
assert(s == slot_len);
memcpy(p, slot, slot_len);
}
return path;
}
static int pci_qdev_find_recursive(PCIBus *bus,
const char *id, PCIDevice **pdev)
{
DeviceState *qdev = qdev_find_recursive(&bus->qbus, id);
if (!qdev) {
return -ENODEV;
}
/* roughly check if given qdev is pci device */
if (object_dynamic_cast(OBJECT(qdev), TYPE_PCI_DEVICE)) {
*pdev = PCI_DEVICE(qdev);
return 0;
}
return -EINVAL;
}
int pci_qdev_find_device(const char *id, PCIDevice **pdev)
{
struct PCIHostBus *host;
int rc = -ENODEV;
QLIST_FOREACH(host, &host_buses, next) {
int tmp = pci_qdev_find_recursive(host->bus, id, pdev);
if (!tmp) {
rc = 0;
break;
}
if (tmp != -ENODEV) {
rc = tmp;
}
}
return rc;
}
MemoryRegion *pci_address_space(PCIDevice *dev)
{
return dev->bus->address_space_mem;
}
MemoryRegion *pci_address_space_io(PCIDevice *dev)
{
return dev->bus->address_space_io;
}
static void pci_device_class_init(ObjectClass *klass, void *data)
{
DeviceClass *k = DEVICE_CLASS(klass);
k->init = pci_qdev_init;
k->unplug = pci_unplug_device;
k->exit = pci_unregister_device;
k->bus_type = TYPE_PCI_BUS;
k->props = pci_props;
}
void pci_setup_iommu(PCIBus *bus, PCIDMAContextFunc fn, void *opaque)
{
bus->dma_context_fn = fn;
bus->dma_context_opaque = opaque;
}
static TypeInfo pci_device_type_info = {
.name = TYPE_PCI_DEVICE,
.parent = TYPE_DEVICE,
.instance_size = sizeof(PCIDevice),
.abstract = true,
.class_size = sizeof(PCIDeviceClass),
.class_init = pci_device_class_init,
};
static void pci_register_types(void)
{
type_register_static(&pci_bus_info);
type_register_static(&pci_device_type_info);
}
type_init(pci_register_types)
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