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path: root/drivers/pci/hotplug
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Diffstat (limited to 'drivers/pci/hotplug')
-rw-r--r--drivers/pci/hotplug/acpiphp.h13
-rw-r--r--drivers/pci/hotplug/acpiphp_glue.c124
2 files changed, 14 insertions, 123 deletions
diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index b3ead7ad7b31..b70ac00a117e 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -79,7 +79,6 @@ struct acpiphp_bridge {
/* Ejectable PCI-to-PCI bridge (PCI bridge and PCI function) */
struct acpiphp_func *func;
- int type;
int nr_slots;
u32 flags;
@@ -146,10 +145,6 @@ struct acpiphp_attention_info
/* PCI bus bridge HID */
#define ACPI_PCI_HOST_HID "PNP0A03"
-/* PCI BRIDGE type */
-#define BRIDGE_TYPE_HOST 0
-#define BRIDGE_TYPE_P2P 1
-
/* ACPI _STA method value (ignore bit 4; battery present) */
#define ACPI_STA_PRESENT (0x00000001)
#define ACPI_STA_ENABLED (0x00000002)
@@ -158,13 +153,7 @@ struct acpiphp_attention_info
#define ACPI_STA_ALL (0x0000000f)
/* bridge flags */
-#define BRIDGE_HAS_STA (0x00000001)
-#define BRIDGE_HAS_EJ0 (0x00000002)
-#define BRIDGE_HAS_HPP (0x00000004)
-#define BRIDGE_HAS_PS0 (0x00000010)
-#define BRIDGE_HAS_PS1 (0x00000020)
-#define BRIDGE_HAS_PS2 (0x00000040)
-#define BRIDGE_HAS_PS3 (0x00000080)
+#define BRIDGE_HAS_EJ0 (0x00000001)
/* slot flags */
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index acb7af220310..4681d2c9b1dd 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -325,8 +325,8 @@ static void init_bridge_misc(struct acpiphp_bridge *bridge)
return;
}
- /* install notify handler */
- if (bridge->type != BRIDGE_TYPE_HOST) {
+ /* install notify handler for P2P bridges */
+ if (!pci_is_root_bus(bridge->pci_bus)) {
if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) {
status = acpi_remove_notify_handler(bridge->func->handle,
ACPI_SYSTEM_NOTIFY,
@@ -369,27 +369,12 @@ static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle
static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge)
{
acpi_handle dummy_handle;
+ struct acpiphp_func *func;
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)))
+ "_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 */
@@ -412,7 +397,6 @@ static void add_host_bridge(struct acpi_pci_root *root)
if (bridge == NULL)
return;
- bridge->type = BRIDGE_TYPE_HOST;
bridge->handle = handle;
bridge->pci_bus = root->bus;
@@ -432,7 +416,6 @@ static void add_p2p_bridge(acpi_handle *handle)
return;
}
- bridge->type = BRIDGE_TYPE_P2P;
bridge->handle = handle;
config_p2p_bridge_flags(bridge);
@@ -543,7 +526,7 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
acpi_status status;
acpi_handle handle = bridge->handle;
- if (bridge->type != BRIDGE_TYPE_HOST) {
+ if (!pci_is_root_bus(bridge->pci_bus)) {
status = acpi_remove_notify_handler(handle,
ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_bridge);
@@ -551,8 +534,7 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
err("failed to remove notify handler\n");
}
- if ((bridge->type != BRIDGE_TYPE_HOST) &&
- ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) {
+ if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) {
status = acpi_install_notify_handler(bridge->func->handle,
ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_func,
@@ -1122,64 +1104,11 @@ static void acpiphp_sanitize_bus(struct pci_bus *bus)
}
}
-/* Program resources in newly inserted bridge */
-static int acpiphp_configure_p2p_bridge(acpi_handle handle)
-{
- struct pci_dev *pdev = acpi_get_pci_dev(handle);
- struct pci_bus *bus = pdev->subordinate;
-
- pci_dev_put(pdev);
-
- pci_bus_size_bridges(bus);
- pci_bus_assign_resources(bus);
- acpiphp_sanitize_bus(bus);
- acpiphp_set_hpp_values(bus);
- pci_enable_bridges(bus);
- return 0;
-}
-
-static void handle_p2p_bridge_insertion(acpi_handle handle, u32 type)
-{
- struct acpi_device *device;
-
- if ((type != ACPI_NOTIFY_BUS_CHECK) &&
- (type != ACPI_NOTIFY_DEVICE_CHECK)) {
- err("unexpected notification type %d\n", type);
- return;
- }
-
- if (acpi_bus_scan(handle)) {
- err("cannot add bridge to acpi list\n");
- return;
- }
- if (acpi_bus_get_device(handle, &device)) {
- err("ACPI device object missing\n");
- return;
- }
- if (!acpiphp_configure_p2p_bridge(handle))
- add_p2p_bridge(handle);
- else
- err("cannot configure and start bridge\n");
-
-}
-
/*
* ACPI event handlers
*/
static acpi_status
-count_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
-{
- int *count = (int *)context;
- struct acpiphp_bridge *bridge;
-
- bridge = acpiphp_handle_to_bridge(handle);
- if (bridge)
- (*count)++;
- return AE_OK ;
-}
-
-static acpi_status
check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv)
{
struct acpiphp_bridge *bridge;
@@ -1203,8 +1132,6 @@ static void _handle_hotplug_event_bridge(struct work_struct *work)
char objname[64];
struct acpi_buffer buffer = { .length = sizeof(objname),
.pointer = objname };
- struct acpi_device *device;
- int num_sub_bridges = 0;
struct acpi_hp_work *hp_work;
acpi_handle handle;
u32 type;
@@ -1212,23 +1139,7 @@ static void _handle_hotplug_event_bridge(struct work_struct *work)
hp_work = container_of(work, struct acpi_hp_work, work);
handle = hp_work->handle;
type = hp_work->type;
-
- if (acpi_bus_get_device(handle, &device)) {
- /* This bridge must have just been physically inserted */
- handle_p2p_bridge_insertion(handle, type);
- goto out;
- }
-
- bridge = acpiphp_handle_to_bridge(handle);
- if (type == ACPI_NOTIFY_BUS_CHECK) {
- acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, ACPI_UINT32_MAX,
- count_sub_bridges, NULL, &num_sub_bridges, NULL);
- }
-
- if (!bridge && !num_sub_bridges) {
- err("cannot get bridge info\n");
- goto out;
- }
+ bridge = (struct acpiphp_bridge *)hp_work->context;
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
@@ -1236,14 +1147,10 @@ static void _handle_hotplug_event_bridge(struct work_struct *work)
case ACPI_NOTIFY_BUS_CHECK:
/* bus re-enumerate */
dbg("%s: Bus check notify on %s\n", __func__, objname);
- if (bridge) {
- dbg("%s: re-enumerating slots under %s\n",
- __func__, objname);
- acpiphp_check_bridge(bridge);
- }
- if (num_sub_bridges)
- acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
- ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL, NULL);
+ dbg("%s: re-enumerating slots under %s\n", __func__, objname);
+ acpiphp_check_bridge(bridge);
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
+ ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL, NULL);
break;
case ACPI_NOTIFY_DEVICE_CHECK:
@@ -1260,8 +1167,7 @@ static void _handle_hotplug_event_bridge(struct work_struct *work)
case ACPI_NOTIFY_EJECT_REQUEST:
/* request device eject */
dbg("%s: Device eject notify on %s\n", __func__, objname);
- if ((bridge->type != BRIDGE_TYPE_HOST) &&
- (bridge->flags & BRIDGE_HAS_EJ0)) {
+ if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) {
struct acpiphp_slot *slot;
slot = bridge->func->slot;
if (!acpiphp_disable_slot(slot))
@@ -1289,7 +1195,6 @@ static void _handle_hotplug_event_bridge(struct work_struct *work)
break;
}
-out:
kfree(hp_work); /* allocated in handle_hotplug_event_bridge */
}
@@ -1324,17 +1229,14 @@ static void _handle_hotplug_event_func(struct work_struct *work)
struct acpi_hp_work *hp_work;
acpi_handle handle;
u32 type;
- void *context;
hp_work = container_of(work, struct acpi_hp_work, work);
handle = hp_work->handle;
type = hp_work->type;
- context = hp_work->context;
+ func = (struct acpiphp_func *)hp_work->context;
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
- func = (struct acpiphp_func *)context;
-
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
/* bus re-enumerate */
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-26 07:44:57 +0300