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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.c99
1 files changed, 39 insertions, 60 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index ad6fd6695495..3d6d4fd1e3c5 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -115,6 +115,35 @@ static const struct acpi_dock_ops acpiphp_dock_ops = {
.handler = handle_hotplug_event_func,
};
+/* Check whether the PCI device is managed by native PCIe hotplug driver */
+static bool device_is_managed_by_native_pciehp(struct pci_dev *pdev)
+{
+ u32 reg32;
+ acpi_handle tmp;
+ struct acpi_pci_root *root;
+
+ /* Check whether the PCIe port supports native PCIe hotplug */
+ if (pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, &reg32))
+ return false;
+ if (!(reg32 & PCI_EXP_SLTCAP_HPC))
+ return false;
+
+ /*
+ * Check whether native PCIe hotplug has been enabled for
+ * this PCIe hierarchy.
+ */
+ tmp = acpi_find_root_bridge_handle(pdev);
+ if (!tmp)
+ return false;
+ root = acpi_pci_find_root(tmp);
+ if (!root)
+ return false;
+ if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL))
+ return false;
+
+ return true;
+}
+
/* callback routine to register each ACPI PCI slot object */
static acpi_status
register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
@@ -142,16 +171,8 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
function = adr & 0xffff;
pdev = pbus->self;
- if (pdev && pci_is_pcie(pdev)) {
- tmp = acpi_find_root_bridge_handle(pdev);
- if (tmp) {
- struct acpi_pci_root *root = acpi_pci_find_root(tmp);
-
- if (root && (root->osc_control_set &
- OSC_PCI_EXPRESS_NATIVE_HP_CONTROL))
- return AE_OK;
- }
- }
+ if (pdev && device_is_managed_by_native_pciehp(pdev))
+ return AE_OK;
newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
if (!newfunc)
@@ -382,10 +403,10 @@ static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge)
/* allocate and initialize host bridge data structure */
-static void add_host_bridge(acpi_handle *handle)
+static void add_host_bridge(struct acpi_pci_root *root)
{
struct acpiphp_bridge *bridge;
- struct acpi_pci_root *root = acpi_pci_find_root(handle);
+ acpi_handle handle = root->device->handle;
bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
if (bridge == NULL)
@@ -468,11 +489,12 @@ find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
/* find hot-pluggable slots, and then find P2P bridge */
-static int add_bridge(acpi_handle handle)
+static int add_bridge(struct acpi_pci_root *root)
{
acpi_status status;
unsigned long long tmp;
acpi_handle dummy_handle;
+ acpi_handle handle = root->device->handle;
/* if the bridge doesn't have _STA, we assume it is always there */
status = acpi_get_handle(handle, "_STA", &dummy_handle);
@@ -490,7 +512,7 @@ static int add_bridge(acpi_handle handle)
/* check if this bridge has ejectable slots */
if (detect_ejectable_slots(handle) > 0) {
dbg("found PCI host-bus bridge with hot-pluggable slots\n");
- add_host_bridge(handle);
+ add_host_bridge(root);
}
/* search P2P bridges under this host bridge */
@@ -588,9 +610,10 @@ cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
return AE_OK;
}
-static void remove_bridge(acpi_handle handle)
+static void remove_bridge(struct acpi_pci_root *root)
{
struct acpiphp_bridge *bridge;
+ acpi_handle handle = root->device->handle;
/* cleanup p2p bridges under this host bridge
in a depth-first manner */
@@ -869,17 +892,6 @@ static int __ref enable_device(struct acpiphp_slot *slot)
return retval;
}
-static void disable_bridges(struct pci_bus *bus)
-{
- struct pci_dev *dev;
- list_for_each_entry(dev, &bus->devices, bus_list) {
- if (dev->subordinate) {
- disable_bridges(dev->subordinate);
- pci_disable_device(dev);
- }
- }
-}
-
/* return first device in slot, acquiring a reference on it */
static struct pci_dev *dev_in_slot(struct acpiphp_slot *slot)
{
@@ -931,12 +943,7 @@ static int disable_device(struct acpiphp_slot *slot)
* here.
*/
while ((pdev = dev_in_slot(slot))) {
- pci_stop_bus_device(pdev);
- if (pdev->subordinate) {
- disable_bridges(pdev->subordinate);
- pci_disable_device(pdev);
- }
- __pci_remove_bus_device(pdev);
+ pci_stop_and_remove_bus_device(pdev);
pci_dev_put(pdev);
}
@@ -1477,34 +1484,6 @@ int __init acpiphp_get_num_slots(void)
}
-#if 0
-/**
- * acpiphp_for_each_slot - call function for each slot
- * @fn: callback function
- * @data: context to be passed to callback function
- */
-static int acpiphp_for_each_slot(acpiphp_callback fn, void *data)
-{
- struct list_head *node;
- struct acpiphp_bridge *bridge;
- struct acpiphp_slot *slot;
- int retval = 0;
-
- list_for_each (node, &bridge_list) {
- bridge = (struct acpiphp_bridge *)node;
- for (slot = bridge->slots; slot; slot = slot->next) {
- retval = fn(slot, data);
- if (!retval)
- goto err_exit;
- }
- }
-
- err_exit:
- return retval;
-}
-#endif
-
-
/**
* acpiphp_enable_slot - power on slot
* @slot: ACPI PHP slot