motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 00:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

pci: pcie host and mmcfg support.

Browse source 
This patch adds common routines for pcie host bridge and pcie mmcfg.
This will be used by q35 based chipset emulation.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Isaku Yamahata 2009-10-30 21:21:18 +09:00 • committed by Anthony Liguori
parent 9cae69bd8d
commit a9f4994611
6 changed files with 349 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

86
hw/pci.c
View file

@ -23,6 +23,7 @@
*/
#include "hw.h"
#include "pci.h"
#include "pci_host.h"
#include "monitor.h"
#include "net.h"
#include "sysemu.h"
@ -248,18 +249,24 @@ static uint8_t pci_sub_bus(PCIBus *s)
static int get_pci_config_device(QEMUFile *f, void *pv, size_t size)
{
PCIDevice *s = container_of(pv, PCIDevice, config);
uint8_t config[PCI_CONFIG_SPACE_SIZE];
uint8_t *config;
int i;
assert(size == sizeof config);
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])
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, sizeof config);
}
}
memcpy(s->config, config, size);
pci_update_mappings(s);
qemu_free(config);
return 0;
}
@ -267,6 +274,7 @@ static int get_pci_config_device(QEMUFile *f, void *pv, size_t size)
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);
}
@ -283,21 +291,42 @@ const VMStateDescription vmstate_pci_device = {
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_INT32_LE(version_id, PCIDevice),
VMSTATE_SINGLE(config, PCIDevice, 0, vmstate_info_pci_config,
typeof_field(PCIDevice,config)),
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, &vmstate_pci_device, s);
vmstate_save_state(f, pci_get_vmstate(s), s);
}
int pci_device_load(PCIDevice *s, QEMUFile *f)
{
return vmstate_load_state(f, &vmstate_pci_device, s, s->version_id);
return vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id);
}
static int pci_set_default_subsystem_id(PCIDevice *pci_dev)
@ -406,14 +435,34 @@ static void pci_init_cmask(PCIDevice *dev)
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 < PCI_CONFIG_SPACE_SIZE; ++i)
for (i = PCI_CONFIG_HEADER_SIZE; i < config_size; ++i)
dev->wmask[i] = 0xff;
}
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,
@ -434,6 +483,7 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *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);
pci_set_default_subsystem_id(pci_dev);
pci_init_cmask(pci_dev);
pci_init_wmask(pci_dev);
@ -501,6 +551,7 @@ static int pci_unregister_device(DeviceState *dev)
qemu_free_irqs(pci_dev->irq);
pci_dev->bus->devices[pci_dev->devfn] = NULL;
pci_config_free(pci_dev);
return 0;
}
@ -641,7 +692,7 @@ uint32_t pci_default_read_config(PCIDevice *d,
{
uint32_t val = 0;
assert(len == 1 || len == 2 || len == 4);
len = MIN(len, PCI_CONFIG_SPACE_SIZE - address);
len = MIN(len, pci_config_size(d) - address);
memcpy(&val, d->config + address, len);
return le32_to_cpu(val);
}
@ -650,10 +701,11 @@ void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
{
uint8_t orig[PCI_CONFIG_SPACE_SIZE];
int i;
uint32_t config_size = pci_config_size(d);
/* 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) {
for(i = 0; i < l && addr < config_size; val >>= 8, ++i, ++addr) {
uint8_t wmask = d->wmask[addr];
d->config[addr] = (d->config[addr] & ~wmask) | (val & wmask);
}
@ -1001,6 +1053,11 @@ static int pci_qdev_init(DeviceState *qdev, DeviceInfo *base)
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,
@ -1057,9 +1114,10 @@ PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *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 < PCI_CONFIG_SPACE_SIZE; ++i)
for (i = PCI_CONFIG_HEADER_SIZE; i < config_size; ++i)
if (pdev->used[i])
offset = i + 1;
else if (i - offset + 1 == size)