#include <acpi/acpi_drivers.h>
#include <acpi/apei.h>
+#include "internal.h"
+
#define PREFIX "ACPI: "
#define _COMPONENT ACPI_PCI_COMPONENT
.ids = root_device_ids,
.attach = acpi_pci_root_add,
.detach = acpi_pci_root_remove,
+ .hotplug = {
+ .ignore = true,
+ },
};
static DEFINE_MUTEX(osc_lock);
return AE_OK;
}
+struct pci_osc_bit_struct {
+ u32 bit;
+ char *desc;
+};
+
+static struct pci_osc_bit_struct pci_osc_support_bit[] = {
+ { OSC_PCI_EXT_CONFIG_SUPPORT, "ExtendedConfig" },
+ { OSC_PCI_ASPM_SUPPORT, "ASPM" },
+ { OSC_PCI_CLOCK_PM_SUPPORT, "ClockPM" },
+ { OSC_PCI_SEGMENT_GROUPS_SUPPORT, "Segments" },
+ { OSC_PCI_MSI_SUPPORT, "MSI" },
+};
+
+static struct pci_osc_bit_struct pci_osc_control_bit[] = {
+ { OSC_PCI_EXPRESS_NATIVE_HP_CONTROL, "PCIeHotplug" },
+ { OSC_PCI_SHPC_NATIVE_HP_CONTROL, "SHPCHotplug" },
+ { OSC_PCI_EXPRESS_PME_CONTROL, "PME" },
+ { OSC_PCI_EXPRESS_AER_CONTROL, "AER" },
+ { OSC_PCI_EXPRESS_CAPABILITY_CONTROL, "PCIeCapability" },
+};
+
+static void decode_osc_bits(struct acpi_pci_root *root, char *msg, u32 word,
+ struct pci_osc_bit_struct *table, int size)
+{
+ char buf[80];
+ int i, len = 0;
+ struct pci_osc_bit_struct *entry;
+
+ buf[0] = '\0';
+ for (i = 0, entry = table; i < size; i++, entry++)
+ if (word & entry->bit)
+ len += snprintf(buf + len, sizeof(buf) - len, "%s%s",
+ len ? " " : "", entry->desc);
+
+ dev_info(&root->device->dev, "_OSC: %s [%s]\n", msg, buf);
+}
+
+static void decode_osc_support(struct acpi_pci_root *root, char *msg, u32 word)
+{
+ decode_osc_bits(root, msg, word, pci_osc_support_bit,
+ ARRAY_SIZE(pci_osc_support_bit));
+}
+
+static void decode_osc_control(struct acpi_pci_root *root, char *msg, u32 word)
+{
+ decode_osc_bits(root, msg, word, pci_osc_control_bit,
+ ARRAY_SIZE(pci_osc_control_bit));
+}
+
static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766";
static acpi_status acpi_pci_run_osc(acpi_handle handle,
goto out;
if (ctrl == *mask)
break;
+ decode_osc_control(root, "platform does not support",
+ ctrl & ~(*mask));
ctrl = *mask;
}
if ((ctrl & req) != req) {
+ decode_osc_control(root, "not requesting control; platform does not support",
+ req & ~(ctrl));
status = AE_SUPPORT;
goto out;
}
static void negotiate_os_control(struct acpi_pci_root *root, int *no_aspm,
int *clear_aspm)
{
- u32 support, base_support, control;
+ u32 support, control, requested;
acpi_status status;
struct acpi_device *device = root->device;
acpi_handle handle = device->handle;
* All supported architectures that use ACPI have support for
* PCI domains, so we indicate this in _OSC support capabilities.
*/
- support = base_support = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
- acpi_pci_osc_support(root, support);
-
+ support = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
if (pci_ext_cfg_avail())
support |= OSC_PCI_EXT_CONFIG_SUPPORT;
- if (pcie_aspm_support_enabled()) {
+ if (pcie_aspm_support_enabled())
support |= OSC_PCI_ASPM_SUPPORT | OSC_PCI_CLOCK_PM_SUPPORT;
- }
if (pci_msi_enabled())
support |= OSC_PCI_MSI_SUPPORT;
- if (support != base_support) {
- status = acpi_pci_osc_support(root, support);
- if (ACPI_FAILURE(status)) {
- dev_info(&device->dev, "ACPI _OSC support "
- "notification failed, disabling PCIe ASPM\n");
- *no_aspm = 1;
- support = base_support;
- }
+
+ decode_osc_support(root, "OS supports", support);
+ status = acpi_pci_osc_support(root, support);
+ if (ACPI_FAILURE(status)) {
+ dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n",
+ acpi_format_exception(status));
+ *no_aspm = 1;
+ return;
}
- if (!pcie_ports_disabled
- && (support & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) {
- control = OSC_PCI_EXPRESS_CAPABILITY_CONTROL
- | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL
- | OSC_PCI_EXPRESS_PME_CONTROL;
-
- if (pci_aer_available()) {
- if (aer_acpi_firmware_first())
- dev_dbg(&device->dev,
- "PCIe errors handled by BIOS.\n");
- else
- control |= OSC_PCI_EXPRESS_AER_CONTROL;
- }
+ if (pcie_ports_disabled) {
+ dev_info(&device->dev, "PCIe port services disabled; not requesting _OSC control\n");
+ return;
+ }
+
+ if ((support & ACPI_PCIE_REQ_SUPPORT) != ACPI_PCIE_REQ_SUPPORT) {
+ decode_osc_support(root, "not requesting OS control; OS requires",
+ ACPI_PCIE_REQ_SUPPORT);
+ return;
+ }
- dev_info(&device->dev,
- "Requesting ACPI _OSC control (0x%02x)\n", control);
+ control = OSC_PCI_EXPRESS_CAPABILITY_CONTROL
+ | OSC_PCI_EXPRESS_NATIVE_HP_CONTROL
+ | OSC_PCI_EXPRESS_PME_CONTROL;
- status = acpi_pci_osc_control_set(handle, &control,
- OSC_PCI_EXPRESS_CAPABILITY_CONTROL);
- if (ACPI_SUCCESS(status)) {
- dev_info(&device->dev,
- "ACPI _OSC control (0x%02x) granted\n",
- control);
- if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
- /*
- * We have ASPM control, but the FADT indicates
- * that it's unsupported. Clear it.
- */
- *clear_aspm = 1;
- }
- } else {
+ if (pci_aer_available()) {
+ if (aer_acpi_firmware_first())
dev_info(&device->dev,
- "ACPI _OSC request failed (%s), "
- "returned control mask: 0x%02x\n",
- acpi_format_exception(status), control);
- dev_info(&device->dev,
- "ACPI _OSC control for PCIe not granted, disabling ASPM\n");
+ "PCIe AER handled by firmware\n");
+ else
+ control |= OSC_PCI_EXPRESS_AER_CONTROL;
+ }
+
+ requested = control;
+ status = acpi_pci_osc_control_set(handle, &control,
+ OSC_PCI_EXPRESS_CAPABILITY_CONTROL);
+ if (ACPI_SUCCESS(status)) {
+ decode_osc_control(root, "OS now controls", control);
+ if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
/*
- * We want to disable ASPM here, but aspm_disabled
- * needs to remain in its state from boot so that we
- * properly handle PCIe 1.1 devices. So we set this
- * flag here, to defer the action until after the ACPI
- * root scan.
+ * We have ASPM control, but the FADT indicates
+ * that it's unsupported. Clear it.
*/
- *no_aspm = 1;
+ *clear_aspm = 1;
}
} else {
- dev_info(&device->dev,
- "Unable to request _OSC control "
- "(_OSC support mask: 0x%02x)\n", support);
+ decode_osc_control(root, "OS requested", requested);
+ decode_osc_control(root, "platform willing to grant", control);
+ dev_info(&device->dev, "_OSC failed (%s); disabling ASPM\n",
+ acpi_format_exception(status));
+
+ /*
+ * We want to disable ASPM here, but aspm_disabled
+ * needs to remain in its state from boot so that we
+ * properly handle PCIe 1.1 devices. So we set this
+ * flag here, to defer the action until after the ACPI
+ * root scan.
+ */
+ *no_aspm = 1;
}
}
dev_err(&device->dev,
"Bus %04x:%02x not present in PCI namespace\n",
root->segment, (unsigned int)root->secondary.start);
+ device->driver_data = NULL;
result = -ENODEV;
goto end;
}
acpi_handle_err(handle, "cannot add bridge to acpi list\n");
}
-static void handle_root_bridge_removal(struct acpi_device *device)
-{
- acpi_status status;
- struct acpi_eject_event *ej_event;
-
- ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
- if (!ej_event) {
- /* Inform firmware the hot-remove operation has error */
- (void) acpi_evaluate_hotplug_ost(device->handle,
- ACPI_NOTIFY_EJECT_REQUEST,
- ACPI_OST_SC_NON_SPECIFIC_FAILURE,
- NULL);
- return;
- }
-
- ej_event->device = device;
- ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
-
- status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event);
- if (ACPI_FAILURE(status))
- kfree(ej_event);
-}
-
-static void _handle_hotplug_event_root(struct work_struct *work)
+static void hotplug_event_root(void *data, u32 type)
{
+ acpi_handle handle = data;
struct acpi_pci_root *root;
- struct acpi_hp_work *hp_work;
- acpi_handle handle;
- u32 type;
-
- hp_work = container_of(work, struct acpi_hp_work, work);
- handle = hp_work->handle;
- type = hp_work->type;
acpi_scan_lock_acquire();
/* request device eject */
acpi_handle_printk(KERN_DEBUG, handle,
"Device eject notify on %s\n", __func__);
- if (root)
- handle_root_bridge_removal(root->device);
- break;
+ if (!root)
+ break;
+
+ get_device(&root->device->dev);
+
+ acpi_scan_lock_release();
+
+ acpi_bus_device_eject(root->device, ACPI_NOTIFY_EJECT_REQUEST);
+ return;
default:
acpi_handle_warn(handle,
"notify_handler: unknown event type 0x%x\n",
}
acpi_scan_lock_release();
- kfree(hp_work); /* allocated in handle_hotplug_event_bridge */
}
static void handle_hotplug_event_root(acpi_handle handle, u32 type,
void *context)
{
- alloc_acpi_hp_work(handle, type, context,
- _handle_hotplug_event_root);
+ acpi_hotplug_execute(hotplug_event_root, handle, type);
}
static acpi_status __init
projects / ~andy / linux / blobdiff