pc: acpi-build: simplify PCI bus tree generation

it basicaly does the same as original approach,
* just without bus/notify tables tracking (less obscure)
  which is easier to follow.
* drops unnecessary loops and bitmaps,
  creating devices and notification method in the same loop.
* saves us ~100LOC

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2015-02-20 18:22:16 +00:00 committed by Michael S. Tsirkin
parent 71096d6cc5
commit b23046abe7
1 changed files with 85 additions and 189 deletions

View File

@ -112,7 +112,6 @@ typedef struct AcpiPmInfo {
typedef struct AcpiMiscInfo {
bool has_hpet;
bool has_tpm;
DECLARE_BITMAP(slot_hotplug_enable, PCI_SLOT_MAX);
const unsigned char *dsdt_code;
unsigned dsdt_size;
uint16_t pvpanic_port;
@ -591,74 +590,37 @@ static void acpi_set_pci_info(void)
}
}
static void build_pci_bus_state_init(AcpiBuildPciBusHotplugState *state,
AcpiBuildPciBusHotplugState *parent,
bool pcihp_bridge_en)
static void build_append_pcihp_notify_entry(GArray *method, int slot)
{
state->parent = parent;
state->device_table = build_alloc_array();
state->notify_table = build_alloc_array();
state->pcihp_bridge_en = pcihp_bridge_en;
GArray *ifctx;
ifctx = build_alloc_array();
build_append_byte(ifctx, 0x7B); /* AndOp */
build_append_byte(ifctx, 0x68); /* Arg0Op */
build_append_int(ifctx, 0x1U << slot);
build_append_byte(ifctx, 0x00); /* NullName */
build_append_byte(ifctx, 0x86); /* NotifyOp */
build_append_namestring(ifctx, "S%.02X", PCI_DEVFN(slot, 0));
build_append_byte(ifctx, 0x69); /* Arg1Op */
/* Pack it up */
build_package(ifctx, 0xA0 /* IfOp */);
build_append_array(method, ifctx);
build_free_array(ifctx);
}
static void build_pci_bus_state_cleanup(AcpiBuildPciBusHotplugState *state)
static void build_append_pci_bus_devices(GArray *parent_scope, PCIBus *bus,
bool pcihp_bridge_en)
{
build_free_array(state->device_table);
build_free_array(state->notify_table);
}
static void *build_pci_bus_begin(PCIBus *bus, void *parent_state)
{
AcpiBuildPciBusHotplugState *parent = parent_state;
AcpiBuildPciBusHotplugState *child = g_malloc(sizeof *child);
build_pci_bus_state_init(child, parent, parent->pcihp_bridge_en);
return child;
}
static void build_pci_bus_end(PCIBus *bus, void *bus_state)
{
AcpiBuildPciBusHotplugState *child = bus_state;
AcpiBuildPciBusHotplugState *parent = child->parent;
GArray *bus_table = build_alloc_array();
DECLARE_BITMAP(slot_hotplug_enable, PCI_SLOT_MAX);
DECLARE_BITMAP(slot_device_present, PCI_SLOT_MAX);
DECLARE_BITMAP(slot_device_system, PCI_SLOT_MAX);
DECLARE_BITMAP(slot_device_vga, PCI_SLOT_MAX);
DECLARE_BITMAP(slot_device_qxl, PCI_SLOT_MAX);
uint8_t op;
int i;
GArray *method = NULL;
QObject *bsel;
GArray *method;
bool bus_hotplug_support = false;
/*
* Skip bridge subtree creation if bridge hotplug is disabled
* to make acpi tables compatible with legacy machine types.
* Skip creation for hotplugged bridges as well.
*/
if (bus->parent_dev && (!child->pcihp_bridge_en ||
DEVICE(bus->parent_dev)->hotplugged)) {
build_free_array(bus_table);
build_pci_bus_state_cleanup(child);
g_free(child);
return;
}
PCIBus *sec;
int i;
if (bus->parent_dev) {
op = 0x82; /* DeviceOp */
build_append_namestring(bus_table, "S%.02X",
bus->parent_dev->devfn);
build_append_byte(bus_table, 0x08); /* NameOp */
build_append_namestring(bus_table, "_SUN");
build_append_int(bus_table, PCI_SLOT(bus->parent_dev->devfn));
build_append_byte(bus_table, 0x08); /* NameOp */
build_append_namestring(bus_table, "_ADR");
build_append_int(bus_table, (PCI_SLOT(bus->parent_dev->devfn) << 16) |
PCI_FUNC(bus->parent_dev->devfn));
build_append_namestring(bus_table, "S%.02X_", bus->parent_dev->devfn);
} else {
op = 0x10; /* ScopeOp */;
build_append_namestring(bus_table, "PCI0");
}
@ -667,29 +629,28 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
build_append_byte(bus_table, 0x08); /* NameOp */
build_append_namestring(bus_table, "BSEL");
build_append_int(bus_table, qint_get_int(qobject_to_qint(bsel)));
memset(slot_hotplug_enable, 0xff, sizeof slot_hotplug_enable);
} else {
/* No bsel - no slots are hot-pluggable */
memset(slot_hotplug_enable, 0x00, sizeof slot_hotplug_enable);
method = build_alloc_method("DVNT", 2);
}
memset(slot_device_present, 0x00, sizeof slot_device_present);
memset(slot_device_system, 0x00, sizeof slot_device_present);
memset(slot_device_vga, 0x00, sizeof slot_device_vga);
memset(slot_device_qxl, 0x00, sizeof slot_device_qxl);
for (i = 0; i < ARRAY_SIZE(bus->devices); i += PCI_FUNC_MAX) {
DeviceClass *dc;
PCIDeviceClass *pc;
PCIDevice *pdev = bus->devices[i];
int slot = PCI_SLOT(i);
bool hotplug_enabled_dev;
bool bridge_in_acpi;
if (!pdev) {
if (bsel) { /* add hotplug slots for non present devices */
void *pcihp = acpi_data_push(bus_table, ACPI_PCIHP_SIZEOF);
memcpy(pcihp, ACPI_PCIHP_AML, ACPI_PCIHP_SIZEOF);
patch_pcihp(slot, pcihp);
build_append_pcihp_notify_entry(method, slot);
}
continue;
}
set_bit(slot, slot_device_present);
pc = PCI_DEVICE_GET_CLASS(pdev);
dc = DEVICE_GET_CLASS(pdev);
@ -698,142 +659,83 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
* In this case they aren't themselves hot-pluggable.
* Hotplugged bridges *are* hot-pluggable.
*/
bridge_in_acpi = pc->is_bridge && child->pcihp_bridge_en &&
!DEVICE(pdev)->hotplugged;
bridge_in_acpi = pc->is_bridge && pcihp_bridge_en &&
!DEVICE(pdev)->hotplugged;
if (pc->class_id == PCI_CLASS_BRIDGE_ISA || bridge_in_acpi) {
set_bit(slot, slot_device_system);
hotplug_enabled_dev = bsel && dc->hotpluggable && !bridge_in_acpi;
if (pc->class_id == PCI_CLASS_BRIDGE_ISA) {
continue;
}
if (pc->class_id == PCI_CLASS_DISPLAY_VGA) {
set_bit(slot, slot_device_vga);
if (object_dynamic_cast(OBJECT(pdev), "qxl-vga")) {
set_bit(slot, slot_device_qxl);
void *pcihp = acpi_data_push(bus_table,
ACPI_PCIQXL_SIZEOF);
memcpy(pcihp, ACPI_PCIQXL_AML, ACPI_PCIQXL_SIZEOF);
patch_pciqxl(slot, pcihp);
} else {
void *pcihp = acpi_data_push(bus_table,
ACPI_PCIVGA_SIZEOF);
memcpy(pcihp, ACPI_PCIVGA_AML, ACPI_PCIVGA_SIZEOF);
patch_pcivga(slot, pcihp);
}
}
} else if (hotplug_enabled_dev) {
void *pcihp = acpi_data_push(bus_table, ACPI_PCIHP_SIZEOF);
if (!dc->hotpluggable || bridge_in_acpi) {
clear_bit(slot, slot_hotplug_enable);
}
}
/* Append Device object for each slot */
for (i = 0; i < PCI_SLOT_MAX; i++) {
bool can_eject = test_bit(i, slot_hotplug_enable);
bool present = test_bit(i, slot_device_present);
bool vga = test_bit(i, slot_device_vga);
bool qxl = test_bit(i, slot_device_qxl);
bool system = test_bit(i, slot_device_system);
if (can_eject) {
void *pcihp = acpi_data_push(bus_table,
ACPI_PCIHP_SIZEOF);
memcpy(pcihp, ACPI_PCIHP_AML, ACPI_PCIHP_SIZEOF);
patch_pcihp(i, pcihp);
bus_hotplug_support = true;
} else if (qxl) {
void *pcihp = acpi_data_push(bus_table,
ACPI_PCIQXL_SIZEOF);
memcpy(pcihp, ACPI_PCIQXL_AML, ACPI_PCIQXL_SIZEOF);
patch_pciqxl(i, pcihp);
} else if (vga) {
void *pcihp = acpi_data_push(bus_table,
ACPI_PCIVGA_SIZEOF);
memcpy(pcihp, ACPI_PCIVGA_AML, ACPI_PCIVGA_SIZEOF);
patch_pcivga(i, pcihp);
} else if (system) {
/* Nothing to do: system devices are in DSDT or in SSDT above. */
} else if (present) {
void *pcihp = acpi_data_push(bus_table,
ACPI_PCINOHP_SIZEOF);
patch_pcihp(slot, pcihp);
build_append_pcihp_notify_entry(method, slot);
} else if (bridge_in_acpi) {
PCIBus *sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
void *pcihp = acpi_data_push(bus_table, ACPI_PCINOHP_SIZEOF);
memcpy(pcihp, ACPI_PCINOHP_AML, ACPI_PCINOHP_SIZEOF);
patch_pcinohp(i, pcihp);
patch_pcinohp(slot, pcihp);
build_append_pci_bus_devices(bus_table, sec_bus, pcihp_bridge_en);
} else { /* non hotpluggable present devices */
void *pcihp = acpi_data_push(bus_table, ACPI_PCINOHP_SIZEOF);
memcpy(pcihp, ACPI_PCINOHP_AML, ACPI_PCINOHP_SIZEOF);
patch_pcinohp(slot, pcihp);
}
}
if (bsel) {
method = build_alloc_method("DVNT", 2);
for (i = 0; i < PCI_SLOT_MAX; i++) {
GArray *notify;
uint8_t op;
if (!test_bit(i, slot_hotplug_enable)) {
continue;
}
notify = build_alloc_array();
op = 0xA0; /* IfOp */
build_append_byte(notify, 0x7B); /* AndOp */
build_append_byte(notify, 0x68); /* Arg0Op */
build_append_int(notify, 0x1U << i);
build_append_byte(notify, 0x00); /* NullName */
build_append_byte(notify, 0x86); /* NotifyOp */
build_append_namestring(notify, "S%.02X", PCI_DEVFN(i, 0));
build_append_byte(notify, 0x69); /* Arg1Op */
/* Pack it up */
build_package(notify, op);
build_append_array(method, notify);
build_free_array(notify);
}
build_append_and_cleanup_method(bus_table, method);
}
/* Append PCNT method to notify about events on local and child buses.
* Add unconditionally for root since DSDT expects it.
*/
if (bus_hotplug_support || child->notify_table->len || !bus->parent_dev) {
method = build_alloc_method("PCNT", 0);
method = build_alloc_method("PCNT", 0);
/* If bus supports hotplug select it and notify about local events */
if (bsel) {
build_append_byte(method, 0x70); /* StoreOp */
build_append_int(method, qint_get_int(qobject_to_qint(bsel)));
build_append_namestring(method, "BNUM");
build_append_namestring(method, "DVNT");
build_append_namestring(method, "PCIU");
build_append_int(method, 1); /* Device Check */
build_append_namestring(method, "DVNT");
build_append_namestring(method, "PCID");
build_append_int(method, 3); /* Eject Request */
}
/* If bus supports hotplug select it and notify about local events */
if (bsel) {
build_append_byte(method, 0x70); /* StoreOp */
build_append_int(method, qint_get_int(qobject_to_qint(bsel)));
build_append_namestring(method, "BNUM");
build_append_namestring(method, "DVNT");
build_append_namestring(method, "PCIU");
build_append_int(method, 1); /* Device Check */
build_append_namestring(method, "DVNT");
build_append_namestring(method, "PCID");
build_append_int(method, 3); /* Eject Request */
}
/* Notify about child bus events in any case */
build_append_array(method, child->notify_table);
build_append_and_cleanup_method(bus_table, method);
/* Append description of child buses */
build_append_array(bus_table, child->device_table);
/* Pack it up */
if (bus->parent_dev) {
build_extop_package(bus_table, op);
} else {
build_package(bus_table, op);
}
/* Append our bus description to parent table */
build_append_array(parent->device_table, bus_table);
/* Also tell parent how to notify us, invoking PCNT method.
* At the moment this is not needed for root as we have a single root.
*/
if (bus->parent_dev) {
build_append_namestring(parent->notify_table, "^PCNT.S%.02X",
bus->parent_dev->devfn);
/* Notify about child bus events in any case */
if (pcihp_bridge_en) {
QLIST_FOREACH(sec, &bus->child, sibling) {
build_append_namestring(method, "^S%.02X.PCNT",
sec->parent_dev->devfn);
}
}
qobject_decref(bsel);
build_append_and_cleanup_method(bus_table, method);
build_package(bus_table, 0x10); /* ScopeOp */
build_append_array(parent_scope, bus_table);
build_free_array(bus_table);
build_pci_bus_state_cleanup(child);
g_free(child);
}
static void
@ -1175,7 +1077,6 @@ build_ssdt(GArray *table_data, GArray *linker,
aml_append(sb_scope, method);
{
AcpiBuildPciBusHotplugState hotplug_state;
Object *pci_host;
PCIBus *bus = NULL;
bool ambiguous;
@ -1185,16 +1086,11 @@ build_ssdt(GArray *table_data, GArray *linker,
bus = PCI_HOST_BRIDGE(pci_host)->bus;
}
build_pci_bus_state_init(&hotplug_state, NULL, pm->pcihp_bridge_en);
if (bus) {
/* Scan all PCI buses. Generate tables to support hotplug. */
pci_for_each_bus_depth_first(bus, build_pci_bus_begin,
build_pci_bus_end, &hotplug_state);
build_append_pci_bus_devices(sb_scope->buf, bus,
pm->pcihp_bridge_en);
}
build_append_array(sb_scope->buf, hotplug_state.device_table);
build_pci_bus_state_cleanup(&hotplug_state);
}
aml_append(ssdt, sb_scope);
}