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-rw-r--r--hw/pci-hotplug.c4
-rw-r--r--hw/pci.c132
-rw-r--r--hw/pci.h8
3 files changed, 108 insertions, 36 deletions
diff --git a/hw/pci-hotplug.c b/hw/pci-hotplug.c
index cea840993e..a254498143 100644
--- a/hw/pci-hotplug.c
+++ b/hw/pci-hotplug.c
@@ -113,7 +113,7 @@ void drive_hot_add(Monitor *mon, const QDict *qdict)
if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
goto err;
}
- dev = pci_find_device(pci_bus, slot, 0);
+ dev = pci_find_device(pci_find_host_bus(0), pci_bus, slot, 0);
if (!dev) {
monitor_printf(mon, "no pci device with address %s\n", pci_addr);
goto err;
@@ -257,7 +257,7 @@ void pci_device_hot_remove(Monitor *mon, const char *pci_addr)
return;
}
- d = pci_find_device(bus, slot, 0);
+ d = pci_find_device(pci_find_host_bus(0), bus, slot, 0);
if (!d) {
monitor_printf(mon, "slot %d empty\n", slot);
return;
diff --git a/hw/pci.c b/hw/pci.c
index a75d981929..3e5780a466 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -44,7 +44,10 @@ struct PCIBus {
void *irq_opaque;
PCIDevice *devices[256];
PCIDevice *parent_dev;
- PCIBus *next;
+
+ 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;
@@ -69,7 +72,13 @@ 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;
+
+struct PCIHostBus {
+ int domain;
+ struct PCIBus *bus;
+ QLIST_ENTRY(PCIHostBus) next;
+};
+static QLIST_HEAD(, PCIHostBus) host_buses;
static const VMStateDescription vmstate_pcibus = {
.name = "PCIBUS",
@@ -127,6 +136,28 @@ static void pci_bus_reset(void *opaque)
}
}
+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_host_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)
{
@@ -134,8 +165,11 @@ void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
qbus_create_inplace(&bus->qbus, &pci_bus_info, parent, name);
bus->devfn_min = devfn_min;
- bus->next = first_bus;
- first_bus = bus;
+
+ /* 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);
}
@@ -177,7 +211,8 @@ PCIBus *pci_register_bus(DeviceState *parent, const char *name,
return bus;
}
-static void pci_register_secondary_bus(PCIBus *bus,
+static void pci_register_secondary_bus(PCIBus *parent,
+ PCIBus *bus,
PCIDevice *dev,
pci_map_irq_fn map_irq,
const char *name)
@@ -185,8 +220,15 @@ static void pci_register_secondary_bus(PCIBus *bus,
qbus_create_inplace(&bus->qbus, &pci_bus_info, &dev->qdev, name);
bus->map_irq = map_irq;
bus->parent_dev = dev;
- bus->next = dev->bus->next;
- dev->bus->next = bus;
+
+ 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)
@@ -196,6 +238,13 @@ int pci_bus_num(PCIBus *s)
return s->parent_dev->config[PCI_SECONDARY_BUS];
}
+static uint8_t pci_sub_bus(PCIBus *s)
+{
+ if (!s->parent_dev)
+ return 255; /* pci host bridge */
+ return s->parent_dev->config[PCI_SUBORDINATE_BUS];
+}
+
static int get_pci_config_device(QEMUFile *f, void *pv, size_t size)
{
PCIDevice *s = container_of(pv, PCIDevice, config);
@@ -301,7 +350,7 @@ static int pci_parse_devaddr(const char *addr, int *domp, int *busp, unsigned *s
return -1;
/* Note: QEMU doesn't implement domains other than 0 */
- if (dom != 0 || pci_find_bus(bus) == NULL)
+ if (!pci_find_bus(pci_find_host_bus(dom), bus))
return -1;
*domp = dom;
@@ -331,7 +380,7 @@ PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
if (!devaddr) {
*devfnp = -1;
- return pci_find_bus(0);
+ return pci_find_bus(pci_find_host_bus(0), 0);
}
if (pci_parse_devaddr(devaddr, &dom, &bus, &slot) < 0) {
@@ -339,7 +388,7 @@ PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
}
*devfnp = slot << 3;
- return pci_find_bus(bus);
+ return pci_find_bus(pci_find_host_bus(0), bus);
}
static void pci_init_cmask(PCIDevice *dev)
@@ -625,8 +674,7 @@ void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
addr, val, len);
#endif
bus_num = (addr >> 16) & 0xff;
- while (s && pci_bus_num(s) != bus_num)
- s = s->next;
+ s = pci_find_bus(s, bus_num);
if (!s)
return;
pci_dev = s->devices[(addr >> 8) & 0xff];
@@ -646,8 +694,7 @@ uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
uint32_t val;
bus_num = (addr >> 16) & 0xff;
- while (s && pci_bus_num(s) != bus_num)
- s= s->next;
+ s = pci_find_bus(s, bus_num);
if (!s)
goto fail;
pci_dev = s->devices[(addr >> 8) & 0xff];
@@ -753,7 +800,7 @@ static const pci_class_desc pci_class_descriptions[] =
{ 0, NULL}
};
-static void pci_info_device(PCIDevice *d)
+static void pci_info_device(PCIBus *bus, PCIDevice *d)
{
Monitor *mon = cur_mon;
int i, class;
@@ -808,30 +855,32 @@ static void pci_info_device(PCIDevice *d)
}
monitor_printf(mon, " id \"%s\"\n", d->qdev.id ? d->qdev.id : "");
if (class == 0x0604 && d->config[0x19] != 0) {
- pci_for_each_device(d->config[0x19], pci_info_device);
+ pci_for_each_device(bus, d->config[0x19], pci_info_device);
}
}
-void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d))
+void pci_for_each_device(PCIBus *bus, int bus_num,
+ void (*fn)(PCIBus *b, PCIDevice *d))
{
- PCIBus *bus = first_bus;
PCIDevice *d;
int devfn;
- while (bus && pci_bus_num(bus) != bus_num)
- bus = bus->next;
+ bus = pci_find_bus(bus, bus_num);
if (bus) {
for(devfn = 0; devfn < 256; devfn++) {
d = bus->devices[devfn];
if (d)
- fn(d);
+ fn(bus, d);
}
}
}
void pci_info(Monitor *mon)
{
- pci_for_each_device(0, pci_info_device);
+ 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[] = {
@@ -918,19 +967,30 @@ static void pci_bridge_write_config(PCIDevice *d,
pci_default_write_config(d, address, val, len);
}
-PCIBus *pci_find_bus(int bus_num)
+PCIBus *pci_find_bus(PCIBus *bus, int bus_num)
{
- PCIBus *bus = first_bus;
+ PCIBus *sec;
- while (bus && pci_bus_num(bus) != bus_num)
- bus = bus->next;
+ if (!bus)
+ return NULL;
- return bus;
+ if (pci_bus_num(bus) == bus_num) {
+ return bus;
+ }
+
+ /* try child bus */
+ QLIST_FOREACH(sec, &bus->child, sibling) {
+ if (pci_bus_num(sec) <= bus_num && bus_num <= pci_sub_bus(sec)) {
+ return pci_find_bus(sec, bus_num);
+ }
+ }
+
+ return NULL;
}
-PCIDevice *pci_find_device(int bus_num, int slot, int function)
+PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function)
{
- PCIBus *bus = pci_find_bus(bus_num);
+ bus = pci_find_bus(bus, bus_num);
if (!bus)
return NULL;
@@ -973,6 +1033,14 @@ static int pci_bridge_initfn(PCIDevice *dev)
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)
{
@@ -985,7 +1053,7 @@ PCIBus *pci_bridge_init(PCIBus *bus, int devfn, uint16_t vid, uint16_t did,
qdev_init_nofail(&dev->qdev);
s = DO_UPCAST(PCIBridge, dev, dev);
- pci_register_secondary_bus(&s->bus, &s->dev, map_irq, name);
+ pci_register_secondary_bus(bus, &s->bus, &s->dev, map_irq, name);
return &s->bus;
}
@@ -1148,7 +1216,8 @@ static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent)
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),
+ 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),
@@ -1169,6 +1238,7 @@ 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),
diff --git a/hw/pci.h b/hw/pci.h
index e83faf598d..b16f8f8985 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -118,6 +118,7 @@ typedef struct PCIIORegion {
#define PCI_BASE_ADDRESS_MEM_PREFETCH 0x08 /* prefetchable? */
#define PCI_PRIMARY_BUS 0x18 /* Primary bus number */
#define PCI_SECONDARY_BUS 0x19 /* Secondary bus number */
+#define PCI_SUBORDINATE_BUS 0x1a /* Highest bus number behind the bridge */
#define PCI_SEC_STATUS 0x1e /* Secondary status register, only bit 14 used */
#define PCI_SUBSYSTEM_VENDOR_ID 0x2c /* 16 bits */
#define PCI_SUBSYSTEM_ID 0x2e /* 16 bits */
@@ -267,9 +268,10 @@ PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len);
uint32_t pci_data_read(void *opaque, uint32_t addr, int len);
int pci_bus_num(PCIBus *s);
-void pci_for_each_device(int bus_num, void (*fn)(PCIDevice *d));
-PCIBus *pci_find_bus(int bus_num);
-PCIDevice *pci_find_device(int bus_num, int slot, int function);
+void pci_for_each_device(PCIBus *bus, int bus_num, void (*fn)(PCIBus *bus, PCIDevice *d));
+PCIBus *pci_find_host_bus(int domain);
+PCIBus *pci_find_bus(PCIBus *bus, int bus_num);
+PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function);
PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-15 04:15:58 +0000