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16eaedf266
qemu/hw/pci.c
Gerd Hoffmann 16eaedf266 qdev/pci: misc fixes. 
* fix secondary bus setup.
 * use base->name instead of "FIXME" for device name.
   Yes, the device name is redundant.  Only for drivers converted
   to qdev already though.  Once all drivers are converted we can
   and should kill it.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2009-07-09 13:07:03 +01:00

1038 lines
29 KiB
C
Raw Blame History

/*
* 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
struct PCIBus {
BusState qbus;
int bus_num;
int devfn_min;
pci_set_irq_fn set_irq;
pci_map_irq_fn map_irq;
uint32_t config_reg; /* XXX: suppress */
/* low level pic */
SetIRQFunc *low_set_irq;
qemu_irq *irq_opaque;
PCIDevice *devices[256];
PCIDevice *parent_dev;
PCIBus *next;
/* 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,
};
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;
static PCIBus *first_bus;
static void pcibus_save(QEMUFile *f, void *opaque)
{
PCIBus *bus = (PCIBus *)opaque;
int i;
qemu_put_be32(f, bus->nirq);
for (i = 0; i < bus->nirq; i++)
qemu_put_be32(f, bus->irq_count[i]);
}
static int pcibus_load(QEMUFile *f, void *opaque, int version_id)
{
PCIBus *bus = (PCIBus *)opaque;
int i, nirq;
if (version_id != 1)
return -EINVAL;
nirq = qemu_get_be32(f);
if (bus->nirq != nirq) {
fprintf(stderr, "pcibus_load: nirq mismatch: src=%d dst=%d\n",
nirq, bus->nirq);
return -EINVAL;
}
for (i = 0; i < nirq; i++)
bus->irq_count[i] = qemu_get_be32(f);
return 0;
}
static void pci_bus_reset(void *opaque)
{
PCIBus *bus = (PCIBus *)opaque;
int i;
for (i = 0; i < bus->nirq; i++) {
bus->irq_count[i] = 0;
}
for (i = 0; i < 256; i++) {
if (bus->devices[i])
memset(bus->devices[i]->irq_state, 0,
sizeof(bus->devices[i]->irq_state));
}
}
PCIBus *pci_register_bus(DeviceState *parent, const char *name,
pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
qemu_irq *pic, int devfn_min, int nirq)
{
PCIBus *bus;
static int nbus = 0;
bus = FROM_QBUS(PCIBus, qbus_create(&pci_bus_info, parent, name));
bus->set_irq = set_irq;
bus->map_irq = map_irq;
bus->irq_opaque = pic;
bus->devfn_min = devfn_min;
bus->nirq = nirq;
bus->irq_count = qemu_malloc(nirq * sizeof(bus->irq_count[0]));
bus->next = first_bus;
first_bus = bus;
register_savevm("PCIBUS", nbus++, 1, pcibus_save, pcibus_load, bus);
qemu_register_reset(pci_bus_reset, bus);
return bus;
}
static PCIBus *pci_register_secondary_bus(PCIDevice *dev, pci_map_irq_fn map_irq)
{
PCIBus *bus;
bus = FROM_QBUS(PCIBus, qbus_create(&pci_bus_info, &dev->qdev, NULL));
bus->map_irq = map_irq;
bus->parent_dev = dev;
bus->next = dev->bus->next;
dev->bus->next = bus;
return bus;
}
int pci_bus_num(PCIBus *s)
{
return s->bus_num;
}
void pci_device_save(PCIDevice *s, QEMUFile *f)
{
int i;
qemu_put_be32(f, 2); /* PCI device version */
qemu_put_buffer(f, s->config, 256);
for (i = 0; i < 4; i++)
qemu_put_be32(f, s->irq_state[i]);
}
int pci_device_load(PCIDevice *s, QEMUFile *f)
{
uint8_t config[PCI_CONFIG_SPACE_SIZE];
uint32_t version_id;
int i;
version_id = qemu_get_be32(f);
if (version_id > 2)
return -EINVAL;
qemu_get_buffer(f, config, sizeof config);
for (i = 0; i < sizeof config; ++i)
if ((config[i] ^ s->config[i]) & s->cmask[i] & ~s->wmask[i])
return -EINVAL;
memcpy(s->config, config, sizeof config);
pci_update_mappings(s);
if (version_id >= 2)
for (i = 0; i < 4; i ++)
s->irq_state[i] = qemu_get_be32(f);
return 0;
}
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 (dom != 0 || pci_find_bus(bus) == NULL)
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;
}
static PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
{
int dom, bus;
unsigned slot;
if (!devaddr) {
*devfnp = -1;
return pci_find_bus(0);
}
if (pci_parse_devaddr(devaddr, &dom, &bus, &slot) < 0) {
return NULL;
}
*devfnp = slot << 3;
return pci_find_bus(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;
dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff;
dev->wmask[PCI_INTERRUPT_LINE] = 0xff;
dev->wmask[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MEMORY
| PCI_COMMAND_MASTER;
for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_SIZE; ++i)
dev->wmask[i] = 0xff;
}
/* -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)
{
if (devfn < 0) {
for(devfn = bus->devfn_min ; devfn < 256; devfn += 8) {
if (!bus->devices[devfn])
goto found;
}
return NULL;
found: ;
} else if (bus->devices[devfn]) {
return NULL;
}
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_set_default_subsystem_id(pci_dev);
pci_init_cmask(pci_dev);
pci_init_wmask(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, 4);
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);
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 == -1)
continue;
if (r->type == PCI_ADDRESS_SPACE_IO) {
isa_unassign_ioport(r->addr, r->size);
} else {
cpu_register_physical_memory(pci_to_cpu_addr(r->addr),
r->size,
IO_MEM_UNASSIGNED);
}
}
}
int pci_unregister_device(PCIDevice *pci_dev)
{
int ret = 0;
if (pci_dev->unregister)
ret = pci_dev->unregister(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;
qdev_free(&pci_dev->qdev);
return 0;
}
void pci_register_bar(PCIDevice *pci_dev, int region_num,
uint32_t size, int type,
PCIMapIORegionFunc *map_func)
{
PCIIORegion *r;
uint32_t addr;
uint32_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%x\n", type, size);
exit(1);
}
r = &pci_dev->io_regions[region_num];
r->addr = -1;
r->size = size;
r->type = type;
r->map_func = map_func;
wmask = ~(size - 1);
if (region_num == PCI_ROM_SLOT) {
addr = 0x30;
/* ROM enable bit is writeable */
wmask |= 1;
} else {
addr = 0x10 + region_num * 4;
}
*(uint32_t *)(pci_dev->config + addr) = cpu_to_le32(type);
*(uint32_t *)(pci_dev->wmask + addr) = cpu_to_le32(wmask);
*(uint32_t *)(pci_dev->cmask + addr) = 0xffffffff;
}
static void pci_update_mappings(PCIDevice *d)
{
PCIIORegion *r;
int cmd, i;
uint32_t last_addr, new_addr, config_ofs;
cmd = le16_to_cpu(*(uint16_t *)(d->config + PCI_COMMAND));
for(i = 0; i < PCI_NUM_REGIONS; i++) {
r = &d->io_regions[i];
if (i == PCI_ROM_SLOT) {
config_ofs = 0x30;
} else {
config_ofs = 0x10 + i * 4;
}
if (r->size != 0) {
if (r->type & PCI_ADDRESS_SPACE_IO) {
if (cmd & PCI_COMMAND_IO) {
new_addr = le32_to_cpu(*(uint32_t *)(d->config +
config_ofs));
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 = -1;
}
} else {
new_addr = -1;
}
} else {
if (cmd & PCI_COMMAND_MEMORY) {
new_addr = le32_to_cpu(*(uint32_t *)(d->config +
config_ofs));
/* the ROM slot has a specific enable bit */
if (i == PCI_ROM_SLOT && !(new_addr & 1))
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 == -1) {
new_addr = -1;
}
} else {
no_mem_map:
new_addr = -1;
}
}
/* now do the real mapping */
if (new_addr != r->addr) {
if (r->addr != -1) {
if (r->type & PCI_ADDRESS_SPACE_IO) {
int class;
/* NOTE: specific hack for IDE in PC case:
only one byte must be mapped. */
class = d->config[0x0a] | (d->config[0x0b] << 8);
if (class == 0x0101 && r->size == 4) {
isa_unassign_ioport(r->addr + 2, 1);
} else {
isa_unassign_ioport(r->addr, r->size);
}
} else {
cpu_register_physical_memory(pci_to_cpu_addr(r->addr),
r->size,
IO_MEM_UNASSIGNED);
qemu_unregister_coalesced_mmio(r->addr, r->size);
}
}
r->addr = new_addr;
if (r->addr != -1) {
r->map_func(d, i, r->addr, r->size, r->type);
}
}
}
}
}
uint32_t pci_default_read_config(PCIDevice *d,
uint32_t address, int len)
{
uint32_t val;
switch(len) {
default:
case 4:
if (address <= 0xfc) {
val = le32_to_cpu(*(uint32_t *)(d->config + address));
break;
}
/* fall through */
case 2:
if (address <= 0xfe) {
val = le16_to_cpu(*(uint16_t *)(d->config + address));
break;
}
/* fall through */
case 1:
val = d->config[address];
break;
}
return val;
}
void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
{
uint8_t orig[PCI_CONFIG_SPACE_SIZE];
int i;
/* not efficient, but simple */
memcpy(orig, d->config, PCI_CONFIG_SPACE_SIZE);
for(i = 0; i < l && addr < PCI_CONFIG_SPACE_SIZE; val >>= 8, ++i, ++addr) {
uint8_t wmask = d->wmask[addr];
d->config[addr] = (d->config[addr] & ~wmask) | (val & wmask);
}
if (memcmp(orig + PCI_BASE_ADDRESS_0, d->config + PCI_BASE_ADDRESS_0, 24)
|| ((orig[PCI_COMMAND] ^ d->config[PCI_COMMAND])
& (PCI_COMMAND_MEMORY | PCI_COMMAND_IO)))
pci_update_mappings(d);
}
void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
{
PCIBus *s = opaque;
PCIDevice *pci_dev;
int config_addr, bus_num;
#if defined(DEBUG_PCI) && 0
printf("pci_data_write: addr=%08x val=%08x len=%d\n",
addr, val, len);
#endif
bus_num = (addr >> 16) & 0xff;
while (s && s->bus_num != bus_num)
s = s->next;
if (!s)
return;
pci_dev = s->devices[(addr >> 8) & 0xff];
if (!pci_dev)
return;
config_addr = addr & 0xff;
#if defined(DEBUG_PCI)
printf("pci_config_write: %s: addr=%02x val=%08x len=%d\n",
pci_dev->name, config_addr, val, len);
#endif
pci_dev->config_write(pci_dev, config_addr, val, len);
}
uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
{
PCIBus *s = opaque;
PCIDevice *pci_dev;
int config_addr, bus_num;
uint32_t val;
bus_num = (addr >> 16) & 0xff;
while (s && s->bus_num != bus_num)
s= s->next;
if (!s)
goto fail;
pci_dev = s->devices[(addr >> 8) & 0xff];
if (!pci_dev) {
fail:
switch(len) {
case 1:
val = 0xff;
break;
case 2:
val = 0xffff;
break;
default:
case 4:
val = 0xffffffff;
break;
}
goto the_end;
}
config_addr = addr & 0xff;
val = pci_dev->config_read(pci_dev, config_addr, len);
#if defined(DEBUG_PCI)
printf("pci_config_read: %s: addr=%02x val=%08x len=%d\n",
pci_dev->name, config_addr, val, len);
#endif
the_end:
#if defined(DEBUG_PCI) && 0
printf("pci_data_read: addr=%08x val=%08x len=%d\n",
addr, val, len);
#endif
return val;
}
/***********************************************************/
/* 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 = (PCIDevice *)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(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",
d->bus->bus_num, d->devfn >> 3, d->devfn & 7);
class = le16_to_cpu(*((uint16_t *)(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",
le16_to_cpu(*((uint16_t *)(d->config + PCI_VENDOR_ID))),
le16_to_cpu(*((uint16_t *)(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) {
monitor_printf(mon, " BUS %d.\n", d->config[0x19]);
}
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_ADDRESS_SPACE_IO) {
monitor_printf(mon, "I/O at 0x%04x [0x%04x].\n",
r->addr, r->addr + r->size - 1);
} else {
monitor_printf(mon, "32 bit memory at 0x%08x [0x%08x].\n",
r->addr, r->addr + r->size - 1);
}
}
}
if (class == 0x0604 && d->config[0x19] != 0) {
pci_for_each_device(d->config[0x19], pci_info_device);
}
}
void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d))
{
PCIBus *bus = first_bus;
PCIDevice *d;
int devfn;
while (bus && bus->bus_num != bus_num)
bus = bus->next;
if (bus) {
for(devfn = 0; devfn < 256; devfn++) {
d = bus->devices[devfn];
if (d)
fn(d);
}
}
}
void pci_info(Monitor *mon)
{
pci_for_each_device(0, pci_info_device);
}
PCIDevice *pci_create(const char *name, const char *devaddr)
{
PCIBus *bus;
int devfn;
DeviceState *dev;
bus = pci_get_bus_devfn(&devfn, devaddr);
if (!bus) {
fprintf(stderr, "Invalid PCI device address %s for device %s\n",
devaddr, name);
exit(1);
}
dev = qdev_create(&bus->qbus, name);
qdev_set_prop_int(dev, "devfn", devfn);
return (PCIDevice *)dev;
}
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. */
PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
const char *default_devaddr)
{
const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr;
PCIDevice *pci_dev;
DeviceState *dev;
int i;
qemu_check_nic_model_list(nd, pci_nic_models, default_model);
for (i = 0; pci_nic_models[i]; i++) {
if (strcmp(nd->model, pci_nic_models[i]) == 0) {
pci_dev = pci_create(pci_nic_names[i], devaddr);
dev = &pci_dev->qdev;
qdev_set_netdev(dev, nd);
qdev_init(dev);
nd->private = dev;
return pci_dev;
}
}
return NULL;
}
typedef struct {
PCIDevice dev;
PCIBus *bus;
} PCIBridge;
static void pci_bridge_write_config(PCIDevice *d,
uint32_t address, uint32_t val, int len)
{
PCIBridge *s = (PCIBridge *)d;
pci_default_write_config(d, address, val, len);
s->bus->bus_num = d->config[PCI_SECONDARY_BUS];
}
PCIBus *pci_find_bus(int bus_num)
{
PCIBus *bus = first_bus;
while (bus && bus->bus_num != bus_num)
bus = bus->next;
return bus;
}
PCIDevice *pci_find_device(int bus_num, int slot, int function)
{
PCIBus *bus = pci_find_bus(bus_num);
if (!bus)
return NULL;
return bus->devices[PCI_DEVFN(slot, function)];
}
PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint16_t vid, uint16_t did,
pci_map_irq_fn map_irq, const char *name)
{
PCIBridge *s;
s = (PCIBridge *)pci_register_device(bus, name, sizeof(PCIBridge),
devfn, NULL, pci_bridge_write_config);
pci_config_set_vendor_id(s->dev.config, vid);
pci_config_set_device_id(s->dev.config, did);
s->dev.config[0x04] = 0x06; // command = bus master, pci mem
s->dev.config[0x05] = 0x00;
s->dev.config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error
s->dev.config[0x07] = 0x00; // status = fast devsel
s->dev.config[0x08] = 0x00; // revision
s->dev.config[0x09] = 0x00; // programming i/f
pci_config_set_class(s->dev.config, PCI_CLASS_BRIDGE_PCI);
s->dev.config[0x0D] = 0x10; // latency_timer
s->dev.config[PCI_HEADER_TYPE] =
PCI_HEADER_TYPE_MULTI_FUNCTION | PCI_HEADER_TYPE_BRIDGE; // header_type
s->dev.config[0x1E] = 0xa0; // secondary status
s->bus = pci_register_secondary_bus(&s->dev, map_irq);
return s->bus;
}
static void pci_qdev_init(DeviceState *qdev, DeviceInfo *base)
{
PCIDevice *pci_dev = (PCIDevice *)qdev;
PCIDeviceInfo *info = container_of(base, PCIDeviceInfo, qdev);
PCIBus *bus;
int devfn;
bus = FROM_QBUS(PCIBus, qdev_get_parent_bus(qdev));
devfn = qdev_get_prop_int(qdev, "devfn", -1);
pci_dev = do_pci_register_device(pci_dev, bus, base->name, devfn,
info->config_read, info->config_write);
assert(pci_dev);
info->init(pci_dev);
}
void pci_qdev_register(PCIDeviceInfo *info)
{
info->qdev.init = pci_qdev_init;
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_simple(PCIBus *bus, int devfn, const char *name)
{
DeviceState *dev;
dev = qdev_create(&bus->qbus, name);
qdev_set_prop_int(dev, "devfn", devfn);
qdev_init(dev);
return (PCIDevice *)dev;
}
static int pci_find_space(PCIDevice *pdev, uint8_t size)
{
int offset = PCI_CONFIG_HEADER_SIZE;
int i;
for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_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 = le16_to_cpu(*((uint16_t *)(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->bus->bus_num, d->devfn >> 3, d->devfn & 7,
le16_to_cpu(*((uint16_t *)(d->config + PCI_VENDOR_ID))),
le16_to_cpu(*((uint16_t *)(d->config + PCI_DEVICE_ID))),
le16_to_cpu(*((uint16_t *)(d->config + PCI_SUBSYSTEM_VENDOR_ID))),
le16_to_cpu(*((uint16_t *)(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%x [0x%x]\n", indent, "",
i, r->type & PCI_ADDRESS_SPACE_IO ? "i/o" : "mem",
r->addr, r->addr + r->size - 1);
}
}
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