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path: root/drivers/pci/hotplug/acpiphp_glue.c
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Diffstat (limited to 'drivers/pci/hotplug/acpiphp_glue.c')
-rw-r--r--drivers/pci/hotplug/acpiphp_glue.c126
1 files changed, 117 insertions, 9 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index fadd264b64c..631efce3a6c 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -319,6 +319,13 @@ static void init_bridge_misc(struct acpiphp_bridge *bridge)
/* install notify handler */
if (bridge->type != BRIDGE_TYPE_HOST) {
+ if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) {
+ status = acpi_remove_notify_handler(bridge->func->handle,
+ ACPI_SYSTEM_NOTIFY,
+ handle_hotplug_event_func);
+ if (ACPI_FAILURE(status))
+ err("failed to remove notify handler\n");
+ }
status = acpi_install_notify_handler(bridge->handle,
ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_bridge,
@@ -331,6 +338,66 @@ static void init_bridge_misc(struct acpiphp_bridge *bridge)
}
+/* find acpiphp_func from acpiphp_bridge */
+static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle)
+{
+ struct list_head *node, *l;
+ struct acpiphp_bridge *bridge;
+ struct acpiphp_slot *slot;
+ struct acpiphp_func *func;
+
+ list_for_each(node, &bridge_list) {
+ bridge = list_entry(node, struct acpiphp_bridge, list);
+ for (slot = bridge->slots; slot; slot = slot->next) {
+ list_for_each(l, &slot->funcs) {
+ func = list_entry(l, struct acpiphp_func,
+ sibling);
+ if (func->handle == handle)
+ return func;
+ }
+ }
+ }
+
+ return NULL;
+}
+
+
+static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge)
+{
+ acpi_handle dummy_handle;
+
+ if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
+ "_STA", &dummy_handle)))
+ bridge->flags |= BRIDGE_HAS_STA;
+
+ if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
+ "_EJ0", &dummy_handle)))
+ bridge->flags |= BRIDGE_HAS_EJ0;
+
+ if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
+ "_PS0", &dummy_handle)))
+ bridge->flags |= BRIDGE_HAS_PS0;
+
+ if (ACPI_SUCCESS(acpi_get_handle(bridge->handle,
+ "_PS3", &dummy_handle)))
+ bridge->flags |= BRIDGE_HAS_PS3;
+
+ /* is this ejectable p2p bridge? */
+ if (bridge->flags & BRIDGE_HAS_EJ0) {
+ struct acpiphp_func *func;
+
+ dbg("found ejectable p2p bridge\n");
+
+ /* make link between PCI bridge and PCI function */
+ func = acpiphp_bridge_handle_to_function(bridge->handle);
+ if (!func)
+ return;
+ bridge->func = func;
+ func->bridge = bridge;
+ }
+}
+
+
/* allocate and initialize host bridge data structure */
static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus)
{
@@ -364,6 +431,7 @@ static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev)
bridge->type = BRIDGE_TYPE_P2P;
bridge->handle = handle;
+ config_p2p_bridge_flags(bridge);
bridge->pci_dev = pci_dev_get(pci_dev);
bridge->pci_bus = pci_dev->subordinate;
@@ -423,7 +491,7 @@ find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
find_p2p_bridge, dev->subordinate, NULL);
if (ACPI_FAILURE(status))
- warn("find_p2p_bridge faied (error code = 0x%x)\n", status);
+ warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
out:
pci_dev_put(dev);
@@ -486,7 +554,7 @@ static int add_bridge(acpi_handle handle)
find_p2p_bridge, pci_bus, NULL);
if (ACPI_FAILURE(status))
- warn("find_p2p_bridge faied (error code = 0x%x)\n",status);
+ warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
return 0;
}
@@ -516,6 +584,16 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
if (ACPI_FAILURE(status))
err("failed to remove notify handler\n");
+ if ((bridge->type != BRIDGE_TYPE_HOST) &&
+ ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) {
+ status = acpi_install_notify_handler(bridge->func->handle,
+ ACPI_SYSTEM_NOTIFY,
+ handle_hotplug_event_func,
+ bridge->func);
+ if (ACPI_FAILURE(status))
+ err("failed to install interrupt notify handler\n");
+ }
+
slot = bridge->slots;
while (slot) {
struct acpiphp_slot *next = slot->next;
@@ -549,6 +627,11 @@ cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
{
struct acpiphp_bridge *bridge;
+ /* cleanup p2p bridges under this P2P bridge
+ in a depth-first manner */
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
+ cleanup_p2p_bridge, NULL, NULL);
+
if (!(bridge = acpiphp_handle_to_bridge(handle)))
return AE_OK;
cleanup_bridge(bridge);
@@ -559,15 +642,14 @@ static void remove_bridge(acpi_handle handle)
{
struct acpiphp_bridge *bridge;
+ /* cleanup p2p bridges under this host bridge
+ in a depth-first manner */
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
+ (u32)1, cleanup_p2p_bridge, NULL, NULL);
+
bridge = acpiphp_handle_to_bridge(handle);
- if (bridge) {
+ if (bridge)
cleanup_bridge(bridge);
- } else {
- /* clean-up p2p bridges under this host bridge */
- acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
- ACPI_UINT32_MAX, cleanup_p2p_bridge,
- NULL, NULL);
- }
}
static struct pci_dev * get_apic_pci_info(acpi_handle handle)
@@ -881,6 +963,7 @@ static int enable_device(struct acpiphp_slot *slot)
struct acpiphp_func *func;
int retval = 0;
int num, max, pass;
+ acpi_status status;
if (slot->flags & SLOT_ENABLED)
goto err_exit;
@@ -933,6 +1016,17 @@ static int enable_device(struct acpiphp_slot *slot)
func = list_entry(l, struct acpiphp_func, sibling);
func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device,
func->function));
+ if (!func->pci_dev)
+ continue;
+
+ if (func->pci_dev->hdr_type != PCI_HEADER_TYPE_BRIDGE &&
+ func->pci_dev->hdr_type != PCI_HEADER_TYPE_CARDBUS)
+ continue;
+
+ status = find_p2p_bridge(func->handle, (u32)1, bus, NULL);
+ if (ACPI_FAILURE(status))
+ warn("find_p2p_bridge failed (error code = 0x%x)\n",
+ status);
}
slot->flags |= SLOT_ENABLED;
@@ -958,6 +1052,13 @@ static int disable_device(struct acpiphp_slot *slot)
list_for_each (l, &slot->funcs) {
func = list_entry(l, struct acpiphp_func, sibling);
+ if (func->bridge) {
+ /* cleanup p2p bridges under this P2P bridge */
+ cleanup_p2p_bridge(func->bridge->handle,
+ (u32)1, NULL, NULL);
+ func->bridge = NULL;
+ }
+
acpiphp_bus_trim(func->handle);
/* try to remove anyway.
* acpiphp_bus_add might have been failed */
@@ -1292,6 +1393,13 @@ static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *cont
case ACPI_NOTIFY_EJECT_REQUEST:
/* request device eject */
dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname);
+ if ((bridge->type != BRIDGE_TYPE_HOST) &&
+ (bridge->flags & BRIDGE_HAS_EJ0)) {
+ struct acpiphp_slot *slot;
+ slot = bridge->func->slot;
+ if (!acpiphp_disable_slot(slot))
+ acpiphp_eject_slot(slot);
+ }
break;
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-20 13:57:45 +0000