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c34369d48c
xemu/hw/pci.c
Isaku Yamahata c34369d48c pci: kill unnecessary included in pci.c 
including pci_host.h isn't needed by pci.c.
This patch kills it.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2009-12-01 17:51:58 +02:00

1457 lines
43 KiB
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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 "monitor.h"
#include "net.h"
#include "sysemu.h"
//#define DEBUG_PCI
#ifdef DEBUG_PCI
# define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
#else
# define PCI_DPRINTF(format, ...) do { } while (0)
#endif
struct PCIBus {
BusState qbus;
int devfn_min;
pci_set_irq_fn set_irq;
pci_map_irq_fn map_irq;
pci_hotplug_fn hotplug;
uint32_t config_reg; /* XXX: suppress */
void *irq_opaque;
PCIDevice *devices[256];
PCIDevice *parent_dev;
QLIST_HEAD(, PCIBus) child; /* this will be replaced by qdev later */
QLIST_ENTRY(PCIBus) sibling;/* this will be replaced by qdev later */
/* The bus IRQ state is the logical OR of the connected devices.
Keep a count of the number of devices with raised IRQs. */
int nirq;
int *irq_count;
};
static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent);
static struct BusInfo pci_bus_info = {
.name = "PCI",
.size = sizeof(PCIBus),
.print_dev = pcibus_dev_print,
.props = (Property[]) {
DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1),
DEFINE_PROP_END_OF_LIST()
}
};
static void pci_update_mappings(PCIDevice *d);
static void pci_set_irq(void *opaque, int irq_num, int level);
target_phys_addr_t pci_mem_base;
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 void pci_device_reset(PCIDevice *dev)
{
int r;
memset(dev->irq_state, 0, sizeof dev->irq_state);
dev->config[PCI_COMMAND] &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER);
dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
dev->config[PCI_INTERRUPT_LINE] = 0x0;
for (r = 0; r < PCI_NUM_REGIONS; ++r) {
if (!dev->io_regions[r].size) {
continue;
}
pci_set_long(dev->config + pci_bar(dev, r), dev->io_regions[r].type);
}
pci_update_mappings(dev);
}
static void pci_bus_reset(void *opaque)
{
PCIBus *bus = opaque;
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 void pci_host_bus_register(int domain, PCIBus *bus)
{
struct PCIHostBus *host;
host = qemu_mallocz(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;
}
void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
const char *name, int devfn_min)
{
static int nbus = 0;
qbus_create_inplace(&bus->qbus, &pci_bus_info, parent, name);
bus->devfn_min = devfn_min;
/* host bridge */
QLIST_INIT(&bus->child);
pci_host_bus_register(0, bus); /* for now only pci domain 0 is supported */
vmstate_register(nbus++, &vmstate_pcibus, bus);
qemu_register_reset(pci_bus_reset, bus);
}
PCIBus *pci_bus_new(DeviceState *parent, const char *name, int devfn_min)
{
PCIBus *bus;
bus = qemu_mallocz(sizeof(*bus));
bus->qbus.qdev_allocated = 1;
pci_bus_new_inplace(bus, parent, name, 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 = qemu_mallocz(nirq * sizeof(bus->irq_count[0]));
}
void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug)
{
bus->qbus.allow_hotplug = 1;
bus->hotplug = hotplug;
}
PCIBus *pci_register_bus(DeviceState *parent, const char *name,
pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
void *irq_opaque, int devfn_min, int nirq)
{
PCIBus *bus;
bus = pci_bus_new(parent, name, devfn_min);
pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq);
return bus;
}
static void pci_register_secondary_bus(PCIBus *parent,
PCIBus *bus,
PCIDevice *dev,
pci_map_irq_fn map_irq,
const char *name)
{
qbus_create_inplace(&bus->qbus, &pci_bus_info, &dev->qdev, name);
bus->map_irq = map_irq;
bus->parent_dev = dev;
QLIST_INIT(&bus->child);
QLIST_INSERT_HEAD(&parent->child, bus, sibling);
}
static void pci_unregister_secondary_bus(PCIBus *bus)
{
assert(QLIST_EMPTY(&bus->child));
QLIST_REMOVE(bus, sibling);
}
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 = qemu_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]) {
qemu_free(config);
return -EINVAL;
}
}
memcpy(s->config, config, size);
pci_update_mappings(s);
qemu_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,
};
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_INT32_ARRAY_V(irq_state, PCIDevice, PCI_NUM_PINS, 2),
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_INT32_ARRAY_V(irq_state, PCIDevice, PCI_NUM_PINS, 2),
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)
{
vmstate_save_state(f, pci_get_vmstate(s), s);
}
int pci_device_load(PCIDevice *s, QEMUFile *f)
{
return vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id);
}
static int pci_set_default_subsystem_id(PCIDevice *pci_dev)
{
uint16_t *id;
id = (void*)(&pci_dev->config[PCI_SUBVENDOR_ID]);
id[0] = cpu_to_le16(pci_default_sub_vendor_id);
id[1] = cpu_to_le16(pci_default_sub_device_id);
return 0;
}
/*
* Parse [[<domain>:]<bus>:]<slot>, return -1 on error
*/
static int pci_parse_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp)
{
const char *p;
char *e;
unsigned long val;
unsigned long dom = 0, bus = 0;
unsigned slot = 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;
}
}
if (dom > 0xffff || bus > 0xff || val > 0x1f)
return -1;
slot = val;
if (*e)
return -1;
/* Note: QEMU doesn't implement domains other than 0 */
if (!pci_find_bus(pci_find_root_bus(dom), bus))
return -1;
*domp = dom;
*busp = bus;
*slotp = slot;
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)) {
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(pci_find_root_bus(0), 0);
}
if (pci_parse_devaddr(devaddr, &dom, &bus, &slot) < 0) {
return NULL;
}
*devfnp = slot << 3;
return pci_find_bus(pci_find_root_bus(0), 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 i;
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);
for (i = PCI_CONFIG_HEADER_SIZE; i < config_size; ++i)
dev->wmask[i] = 0xff;
}
static void pci_init_wmask_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);
pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, 0xffff);
}
static void pci_config_alloc(PCIDevice *pci_dev)
{
int config_size = pci_config_size(pci_dev);
pci_dev->config = qemu_mallocz(config_size);
pci_dev->cmask = qemu_mallocz(config_size);
pci_dev->wmask = qemu_mallocz(config_size);
pci_dev->used = qemu_mallocz(config_size);
}
static void pci_config_free(PCIDevice *pci_dev)
{
qemu_free(pci_dev->config);
qemu_free(pci_dev->cmask);
qemu_free(pci_dev->wmask);
qemu_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,
PCIConfigReadFunc *config_read,
PCIConfigWriteFunc *config_write,
uint8_t header_type)
{
if (devfn < 0) {
for(devfn = bus->devfn_min ; devfn < 256; devfn += 8) {
if (!bus->devices[devfn])
goto found;
}
hw_error("PCI: no devfn available for %s, all in use\n", name);
found: ;
} else if (bus->devices[devfn]) {
hw_error("PCI: devfn %d not available for %s, in use by %s\n", devfn,
name, bus->devices[devfn]->name);
}
pci_dev->bus = bus;
pci_dev->devfn = devfn;
pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
memset(pci_dev->irq_state, 0, sizeof(pci_dev->irq_state));
pci_config_alloc(pci_dev);
header_type &= ~PCI_HEADER_TYPE_MULTI_FUNCTION;
if (header_type == PCI_HEADER_TYPE_NORMAL) {
pci_set_default_subsystem_id(pci_dev);
}
pci_init_cmask(pci_dev);
pci_init_wmask(pci_dev);
if (header_type == PCI_HEADER_TYPE_BRIDGE) {
pci_init_wmask_bridge(pci_dev);
}
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;
}
PCIDevice *pci_register_device(PCIBus *bus, const char *name,
int instance_size, int devfn,
PCIConfigReadFunc *config_read,
PCIConfigWriteFunc *config_write)
{
PCIDevice *pci_dev;
pci_dev = qemu_mallocz(instance_size);
pci_dev = do_pci_register_device(pci_dev, bus, name, devfn,
config_read, config_write,
PCI_HEADER_TYPE_NORMAL);
return pci_dev;
}
static target_phys_addr_t pci_to_cpu_addr(target_phys_addr_t addr)
{
return addr + pci_mem_base;
}
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;
if (r->type == PCI_BASE_ADDRESS_SPACE_IO) {
isa_unassign_ioport(r->addr, r->filtered_size);
} else {
cpu_register_physical_memory(pci_to_cpu_addr(r->addr),
r->filtered_size,
IO_MEM_UNASSIGNED);
}
}
}
static int pci_unregister_device(DeviceState *dev)
{
PCIDevice *pci_dev = DO_UPCAST(PCIDevice, qdev, dev);
PCIDeviceInfo *info = DO_UPCAST(PCIDeviceInfo, qdev, dev->info);
int ret = 0;
if (info->exit)
ret = info->exit(pci_dev);
if (ret)
return ret;
pci_unregister_io_regions(pci_dev);
qemu_free_irqs(pci_dev->irq);
pci_dev->bus->devices[pci_dev->devfn] = NULL;
pci_config_free(pci_dev);
return 0;
}
void pci_register_bar(PCIDevice *pci_dev, int region_num,
pcibus_t size, int type,
PCIMapIORegionFunc *map_func)
{
PCIIORegion *r;
uint32_t addr;
pcibus_t wmask;
if ((unsigned int)region_num >= PCI_NUM_REGIONS)
return;
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->filtered_size = size;
r->type = type;
r->map_func = map_func;
wmask = ~(size - 1);
addr = pci_bar(pci_dev, region_num);
if (region_num == PCI_ROM_SLOT) {
/* ROM enable bit is writeable */
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);
}
}
static uint32_t pci_config_get_io_base(PCIDevice *d,
uint32_t base, uint32_t base_upper16)
{
uint32_t val;
val = ((uint32_t)d->config[base] & PCI_IO_RANGE_MASK) << 8;
if (d->config[base] & PCI_IO_RANGE_TYPE_32) {
val |= (uint32_t)pci_get_word(d->config + PCI_IO_BASE_UPPER16) << 16;
}
return val;
}
static uint64_t pci_config_get_memory_base(PCIDevice *d, uint32_t base)
{
return ((uint64_t)pci_get_word(d->config + base) & PCI_MEMORY_RANGE_MASK)
<< 16;
}
static uint64_t pci_config_get_pref_base(PCIDevice *d,
uint32_t base, uint32_t upper)
{
uint64_t val;
val = ((uint64_t)pci_get_word(d->config + base) &
PCI_PREF_RANGE_MASK) << 16;
val |= (uint64_t)pci_get_long(d->config + upper) << 32;
return val;
}
static pcibus_t pci_bridge_get_base(PCIDevice *bridge, uint8_t type)
{
pcibus_t base;
if (type & PCI_BASE_ADDRESS_SPACE_IO) {
base = pci_config_get_io_base(bridge,
PCI_IO_BASE, PCI_IO_BASE_UPPER16);
} else {
if (type & PCI_BASE_ADDRESS_MEM_PREFETCH) {
base = pci_config_get_pref_base(
bridge, PCI_PREF_MEMORY_BASE, PCI_PREF_BASE_UPPER32);
} else {
base = pci_config_get_memory_base(bridge, PCI_MEMORY_BASE);
}
}
return base;
}
static pcibus_t pci_bridge_get_limit(PCIDevice *bridge, uint8_t type)
{
pcibus_t limit;
if (type & PCI_BASE_ADDRESS_SPACE_IO) {
limit = pci_config_get_io_base(bridge,
PCI_IO_LIMIT, PCI_IO_LIMIT_UPPER16);
limit |= 0xfff; /* PCI bridge spec 3.2.5.6. */
} else {
if (type & PCI_BASE_ADDRESS_MEM_PREFETCH) {
limit = pci_config_get_pref_base(
bridge, PCI_PREF_MEMORY_LIMIT, PCI_PREF_LIMIT_UPPER32);
} else {
limit = pci_config_get_memory_base(bridge, PCI_MEMORY_LIMIT);
}
limit |= 0xfffff; /* PCI bridge spec 3.2.5.{1, 8}. */
}
return limit;
}
static void pci_bridge_filter(PCIDevice *d, pcibus_t *addr, pcibus_t *size,
uint8_t type)
{
pcibus_t base = *addr;
pcibus_t limit = *addr + *size - 1;
PCIDevice *br;
for (br = d->bus->parent_dev; br; br = br->bus->parent_dev) {
uint16_t cmd = pci_get_word(d->config + PCI_COMMAND);
if (type & PCI_BASE_ADDRESS_SPACE_IO) {
if (!(cmd & PCI_COMMAND_IO)) {
goto no_map;
}
} else {
if (!(cmd & PCI_COMMAND_MEMORY)) {
goto no_map;
}
}
base = MAX(base, pci_bridge_get_base(br, type));
limit = MIN(limit, pci_bridge_get_limit(br, type));
}
if (base > limit) {
no_map:
*addr = PCI_BAR_UNMAPPED;
*size = 0;
} else {
*addr = base;
*size = limit - base + 1;
}
}
static void pci_update_mappings(PCIDevice *d)
{
PCIIORegion *r;
int cmd, i;
pcibus_t last_addr, new_addr;
pcibus_t filtered_size;
cmd = pci_get_word(d->config + PCI_COMMAND);
for(i = 0; i < PCI_NUM_REGIONS; i++) {
r = &d->io_regions[i];
/* this region isn't registered */
if (r->size == 0)
continue;
if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
if (cmd & PCI_COMMAND_IO) {
new_addr = pci_get_long(d->config + pci_bar(d, i));
new_addr = new_addr & ~(r->size - 1);
last_addr = new_addr + r->size - 1;
/* NOTE: we have only 64K ioports on PC */
if (last_addr <= new_addr || new_addr == 0 ||
last_addr >= 0x10000) {
new_addr = PCI_BAR_UNMAPPED;
}
} else {
new_addr = PCI_BAR_UNMAPPED;
}
} else {
if (cmd & PCI_COMMAND_MEMORY) {
if (r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
new_addr = pci_get_quad(d->config + pci_bar(d, i));
} else {
new_addr = pci_get_long(d->config + pci_bar(d, i));
}
/* the ROM slot has a specific enable bit */
if (i == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE))
goto no_mem_map;
new_addr = new_addr & ~(r->size - 1);
last_addr = new_addr + r->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 ||
/* Now pcibus_t is 64bit.
* Check if 32 bit BAR wrap around explicitly.
* Without this, PC ide doesn't work well.
* TODO: remove this work around.
*/
(!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) &&
last_addr >= UINT32_MAX) ||
/*
* OS is allowed to set BAR beyond its addressable
* bits. For example, 32 bit OS can set 64bit bar
* to >4G. Check it.
*/
last_addr >= TARGET_PHYS_ADDR_MAX) {
new_addr = PCI_BAR_UNMAPPED;
}
} else {
no_mem_map:
new_addr = PCI_BAR_UNMAPPED;
}
}
/* bridge filtering */
filtered_size = r->size;
if (new_addr != PCI_BAR_UNMAPPED) {
pci_bridge_filter(d, &new_addr, &filtered_size, r->type);
}
/* This bar isn't changed */
if (new_addr == r->addr && filtered_size == r->filtered_size)
continue;
/* now do the real mapping */
if (r->addr != PCI_BAR_UNMAPPED) {
if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
int class;
/* NOTE: specific hack for IDE in PC case:
only one byte must be mapped. */
class = pci_get_word(d->config + PCI_CLASS_DEVICE);
if (class == 0x0101 && r->size == 4) {
isa_unassign_ioport(r->addr + 2, 1);
} else {
isa_unassign_ioport(r->addr, r->filtered_size);
}
} else {
cpu_register_physical_memory(pci_to_cpu_addr(r->addr),
r->filtered_size,
IO_MEM_UNASSIGNED);
qemu_unregister_coalesced_mmio(r->addr, r->filtered_size);
}
}
r->addr = new_addr;
r->filtered_size = filtered_size;
if (r->addr != PCI_BAR_UNMAPPED) {
/*
* TODO: currently almost all the map funcions assumes
* filtered_size == size and addr & ~(size - 1) == addr.
* However with bridge filtering, they aren't always true.
* Teach them such cases, such that filtered_size < size and
* addr & (size - 1) != 0.
*/
r->map_func(d, i, r->addr, r->filtered_size, r->type);
}
}
}
uint32_t pci_default_read_config(PCIDevice *d,
uint32_t address, int len)
{
uint32_t val = 0;
assert(len == 1 || len == 2 || len == 4);
len = MIN(len, pci_config_size(d) - address);
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;
uint32_t config_size = pci_config_size(d);
for (i = 0; i < l && addr + i < config_size; val >>= 8, ++i) {
uint8_t wmask = d->wmask[addr + i];
d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask);
}
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);
}
/***********************************************************/
/* 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;
PCIBus *bus;
int change;
change = level - pci_dev->irq_state[irq_num];
if (!change)
return;
pci_dev->irq_state[irq_num] = level;
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);
}
/***********************************************************/
/* monitor info on PCI */
typedef struct {
uint16_t class;
const char *desc;
} pci_class_desc;
static const pci_class_desc pci_class_descriptions[] =
{
{ 0x0100, "SCSI controller"},
{ 0x0101, "IDE controller"},
{ 0x0102, "Floppy controller"},
{ 0x0103, "IPI controller"},
{ 0x0104, "RAID controller"},
{ 0x0106, "SATA controller"},
{ 0x0107, "SAS controller"},
{ 0x0180, "Storage controller"},
{ 0x0200, "Ethernet controller"},
{ 0x0201, "Token Ring controller"},
{ 0x0202, "FDDI controller"},
{ 0x0203, "ATM controller"},
{ 0x0280, "Network controller"},
{ 0x0300, "VGA controller"},
{ 0x0301, "XGA controller"},
{ 0x0302, "3D controller"},
{ 0x0380, "Display controller"},
{ 0x0400, "Video controller"},
{ 0x0401, "Audio controller"},
{ 0x0402, "Phone"},
{ 0x0480, "Multimedia controller"},
{ 0x0500, "RAM controller"},
{ 0x0501, "Flash controller"},
{ 0x0580, "Memory controller"},
{ 0x0600, "Host bridge"},
{ 0x0601, "ISA bridge"},
{ 0x0602, "EISA bridge"},
{ 0x0603, "MC bridge"},
{ 0x0604, "PCI bridge"},
{ 0x0605, "PCMCIA bridge"},
{ 0x0606, "NUBUS bridge"},
{ 0x0607, "CARDBUS bridge"},
{ 0x0608, "RACEWAY bridge"},
{ 0x0680, "Bridge"},
{ 0x0c03, "USB controller"},
{ 0, NULL}
};
static void pci_info_device(PCIBus *bus, PCIDevice *d)
{
Monitor *mon = cur_mon;
int i, class;
PCIIORegion *r;
const pci_class_desc *desc;
monitor_printf(mon, " Bus %2d, device %3d, function %d:\n",
pci_bus_num(d->bus),
PCI_SLOT(d->devfn), PCI_FUNC(d->devfn));
class = pci_get_word(d->config + PCI_CLASS_DEVICE);
monitor_printf(mon, " ");
desc = pci_class_descriptions;
while (desc->desc && class != desc->class)
desc++;
if (desc->desc) {
monitor_printf(mon, "%s", desc->desc);
} else {
monitor_printf(mon, "Class %04x", class);
}
monitor_printf(mon, ": PCI device %04x:%04x\n",
pci_get_word(d->config + PCI_VENDOR_ID),
pci_get_word(d->config + PCI_DEVICE_ID));
if (d->config[PCI_INTERRUPT_PIN] != 0) {
monitor_printf(mon, " IRQ %d.\n",
d->config[PCI_INTERRUPT_LINE]);
}
if (class == 0x0604) {
uint64_t base;
uint64_t limit;
monitor_printf(mon, " BUS %d.\n", d->config[0x19]);
monitor_printf(mon, " secondary bus %d.\n",
d->config[PCI_SECONDARY_BUS]);
monitor_printf(mon, " subordinate bus %d.\n",
d->config[PCI_SUBORDINATE_BUS]);
base = pci_bridge_get_base(d, PCI_BASE_ADDRESS_SPACE_IO);
limit = pci_bridge_get_limit(d, PCI_BASE_ADDRESS_SPACE_IO);
monitor_printf(mon, " IO range [0x%04"PRIx64", 0x%04"PRIx64"]\n",
base, limit);
base = pci_bridge_get_base(d, PCI_BASE_ADDRESS_SPACE_MEMORY);
limit= pci_bridge_get_limit(d, PCI_BASE_ADDRESS_SPACE_MEMORY);
monitor_printf(mon,
" memory range [0x%08"PRIx64", 0x%08"PRIx64"]\n",
base, limit);
base = pci_bridge_get_base(d, PCI_BASE_ADDRESS_SPACE_MEMORY |
PCI_BASE_ADDRESS_MEM_PREFETCH);
limit = pci_bridge_get_limit(d, PCI_BASE_ADDRESS_SPACE_MEMORY |
PCI_BASE_ADDRESS_MEM_PREFETCH);
monitor_printf(mon, " prefetchable memory range "
"[0x%08"PRIx64", 0x%08"PRIx64"]\n", base, limit);
}
for(i = 0;i < PCI_NUM_REGIONS; i++) {
r = &d->io_regions[i];
if (r->size != 0) {
monitor_printf(mon, " BAR%d: ", i);
if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
monitor_printf(mon, "I/O at 0x%04"FMT_PCIBUS
" [0x%04"FMT_PCIBUS"].\n",
r->addr, r->addr + r->size - 1);
} else {
const char *type = r->type & PCI_BASE_ADDRESS_MEM_TYPE_64 ?
"64 bit" : "32 bit";
const char *prefetch =
r->type & PCI_BASE_ADDRESS_MEM_PREFETCH ?
" prefetchable" : "";
monitor_printf(mon, "%s%s memory at 0x%08"FMT_PCIBUS
" [0x%08"FMT_PCIBUS"].\n",
type, prefetch,
r->addr, r->addr + r->size - 1);
}
}
}
monitor_printf(mon, " id \"%s\"\n", d->qdev.id ? d->qdev.id : "");
if (class == 0x0604 && d->config[0x19] != 0) {
pci_for_each_device(bus, d->config[0x19], pci_info_device);
}
}
static void pci_for_each_device_under_bus(PCIBus *bus,
void (*fn)(PCIBus *b, PCIDevice *d))
{
PCIDevice *d;
int devfn;
for(devfn = 0; devfn < 256; devfn++) {
d = bus->devices[devfn];
if (d)
fn(bus, d);
}
}
void pci_for_each_device(PCIBus *bus, int bus_num,
void (*fn)(PCIBus *b, PCIDevice *d))
{
bus = pci_find_bus(bus, bus_num);
if (bus) {
pci_for_each_device_under_bus(bus, fn);
}
}
void pci_info(Monitor *mon)
{
struct PCIHostBus *host;
QLIST_FOREACH(host, &host_buses, next) {
pci_for_each_device(host->bus, 0, pci_info_device);
}
}
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) {
qemu_error("Invalid PCI device address %s for device %s\n",
devaddr, pci_nic_names[i]);
return NULL;
}
pci_dev = pci_create(bus, devfn, pci_nic_names[i]);
dev = &pci_dev->qdev;
if (nd->name)
dev->id = qemu_strdup(nd->name);
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;
}
typedef struct {
PCIDevice dev;
PCIBus bus;
uint32_t vid;
uint32_t did;
} PCIBridge;
static void pci_bridge_update_mappings_fn(PCIBus *b, PCIDevice *d)
{
pci_update_mappings(d);
}
static void pci_bridge_update_mappings(PCIBus *b)
{
PCIBus *child;
pci_for_each_device_under_bus(b, pci_bridge_update_mappings_fn);
QLIST_FOREACH(child, &b->child, sibling) {
pci_bridge_update_mappings(child);
}
}
static void pci_bridge_write_config(PCIDevice *d,
uint32_t address, uint32_t val, int len)
{
pci_default_write_config(d, address, val, len);
if (/* io base/limit */
ranges_overlap(address, len, PCI_IO_BASE, 2) ||
/* memory base/limit, prefetchable base/limit and
io base/limit upper 16 */
ranges_overlap(address, len, PCI_MEMORY_BASE, 20)) {
pci_bridge_update_mappings(d->bus);
}
}
PCIBus *pci_find_bus(PCIBus *bus, int bus_num)
{
PCIBus *sec;
if (!bus)
return NULL;
if (pci_bus_num(bus) == bus_num) {
return bus;
}
/* try child bus */
QLIST_FOREACH(sec, &bus->child, sibling) {
if (!bus->parent_dev /* pci host bridge */
|| (pci_bus_num(sec) <= bus_num &&
bus->parent_dev->config[PCI_SUBORDINATE_BUS])) {
return pci_find_bus(sec, bus_num);
}
}
return NULL;
}
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function)
{
bus = pci_find_bus(bus, bus_num);
if (!bus)
return NULL;
return bus->devices[PCI_DEVFN(slot, function)];
}
static int pci_bridge_initfn(PCIDevice *dev)
{
PCIBridge *s = DO_UPCAST(PCIBridge, dev, dev);
pci_config_set_vendor_id(s->dev.config, s->vid);
pci_config_set_device_id(s->dev.config, s->did);
/* TODO: intial value
* command register:
* According to PCI bridge spec, after reset
* bus master bit is off
* memory space enable bit is off
* According to manual (805-1251.pdf).(See abp_pbi.c for its links.)
* the reset value should be zero unless the boot pin is tied high
* (which is tru) and thus it should be PCI_COMMAND_MEMORY.
*
* For now, don't touch the value.
* Later command register will be set to zero and apb_pci.c will
* override the value.
* Same for latency timer, and multi function bit of header type.
*/
pci_set_word(dev->config + PCI_COMMAND,
PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
pci_set_word(dev->config + PCI_STATUS,
PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK);
pci_config_set_class(dev->config, PCI_CLASS_BRIDGE_PCI);
dev->config[PCI_LATENCY_TIMER] = 0x10;
dev->config[PCI_HEADER_TYPE] =
PCI_HEADER_TYPE_MULTI_FUNCTION | PCI_HEADER_TYPE_BRIDGE;
pci_set_word(dev->config + PCI_SEC_STATUS,
PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK);
return 0;
}
static int pci_bridge_exitfn(PCIDevice *pci_dev)
{
PCIBridge *s = DO_UPCAST(PCIBridge, dev, pci_dev);
PCIBus *bus = &s->bus;
pci_unregister_secondary_bus(bus);
return 0;
}
PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint16_t vid, uint16_t did,
pci_map_irq_fn map_irq, const char *name)
{
PCIDevice *dev;
PCIBridge *s;
dev = pci_create(bus, devfn, "pci-bridge");
qdev_prop_set_uint32(&dev->qdev, "vendorid", vid);
qdev_prop_set_uint32(&dev->qdev, "deviceid", did);
qdev_init_nofail(&dev->qdev);
s = DO_UPCAST(PCIBridge, dev, dev);
pci_register_secondary_bus(bus, &s->bus, &s->dev, map_irq, name);
return &s->bus;
}
static int pci_qdev_init(DeviceState *qdev, DeviceInfo *base)
{
PCIDevice *pci_dev = (PCIDevice *)qdev;
PCIDeviceInfo *info = container_of(base, PCIDeviceInfo, qdev);
PCIBus *bus;
int devfn, rc;
/* initialize cap_present for pci_is_express() and pci_config_size() */
if (info->is_express) {
pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
}
bus = FROM_QBUS(PCIBus, qdev_get_parent_bus(qdev));
devfn = pci_dev->devfn;
pci_dev = do_pci_register_device(pci_dev, bus, base->name, devfn,
info->config_read, info->config_write,
info->header_type);
rc = info->init(pci_dev);
if (rc != 0)
return rc;
if (qdev->hotplugged)
bus->hotplug(pci_dev, 1);
return 0;
}
static int pci_unplug_device(DeviceState *qdev)
{
PCIDevice *dev = DO_UPCAST(PCIDevice, qdev, qdev);
dev->bus->hotplug(dev, 0);
return 0;
}
void pci_qdev_register(PCIDeviceInfo *info)
{
info->qdev.init = pci_qdev_init;
info->qdev.unplug = pci_unplug_device;
info->qdev.exit = pci_unregister_device;
info->qdev.bus_info = &pci_bus_info;
qdev_register(&info->qdev);
}
void pci_qdev_register_many(PCIDeviceInfo *info)
{
while (info->qdev.name) {
pci_qdev_register(info);
info++;
}
}
PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name)
{
DeviceState *dev;
dev = qdev_create(&bus->qbus, name);
qdev_prop_set_uint32(dev, "addr", devfn);
return DO_UPCAST(PCIDevice, qdev, dev);
}
PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name)
{
PCIDevice *dev = pci_create(bus, devfn, name);
qdev_init_nofail(&dev->qdev);
return dev;
}
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;
}
/* 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 size)
{
uint8_t offset = pci_find_space(pdev, size);
uint8_t *config = pdev->config + offset;
if (!offset)
return -ENOSPC;
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 writeable again */
memset(pdev->wmask + offset, 0xff, 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;
}
/* Reserve space for capability at a known offset (to call after load). */
void pci_reserve_capability(PCIDevice *pdev, uint8_t offset, uint8_t size)
{
memset(pdev->used + offset, 0xff, size);
}
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,
d->config[PCI_SECONDARY_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 PCIDeviceInfo bridge_info = {
.qdev.name = "pci-bridge",
.qdev.size = sizeof(PCIBridge),
.init = pci_bridge_initfn,
.exit = pci_bridge_exitfn,
.config_write = pci_bridge_write_config,
.qdev.props = (Property[]) {
DEFINE_PROP_HEX32("vendorid", PCIBridge, vid, 0),
DEFINE_PROP_HEX32("deviceid", PCIBridge, did, 0),
DEFINE_PROP_END_OF_LIST(),
}
};
static void pci_register_devices(void)
{
pci_qdev_register(&bridge_info);
}
device_init(pci_register_devices)
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