/* Thunderbolt GUID for WAKE_SUPPORTED: 6c501103-c189-4296-ba72-9bf5a26ebe5d */
GUID_INIT(0x6c501103, 0xc189, 0x4296,
0xba, 0x72, 0x9b, 0xf5, 0xa2, 0x6e, 0xbe, 0x5d),
+ /* Storage device needs D3 GUID: 5025030f-842f-4ab4-a561-99a5189762d0 */
+ GUID_INIT(0x5025030f, 0x842f, 0x4ab4,
+ 0xa5, 0x61, 0x99, 0xa5, 0x18, 0x97, 0x62, 0xd0),
};
/* ACPI _DSD data subnodes GUID: dbb8e3e6-5886-4ba6-8795-1319f52a966b */
* Copyright (c) 2011-2014, Intel Corporation.
*/
+#include <linux/acpi.h>
#include <linux/aer.h>
#include <linux/async.h>
#include <linux/blkdev.h>
module_param_cb(poll_queues, &io_queue_count_ops, &poll_queues, 0644);
MODULE_PARM_DESC(poll_queues, "Number of queues to use for polled IO.");
+static bool noacpi;
+module_param(noacpi, bool, 0444);
+MODULE_PARM_DESC(noacpi, "disable acpi bios quirks");
+
struct nvme_dev;
struct nvme_queue;
return 0;
}
+#ifdef CONFIG_ACPI
+static bool nvme_acpi_storage_d3(struct pci_dev *dev)
+{
+ struct acpi_device *adev;
+ struct pci_dev *root;
+ acpi_handle handle;
+ acpi_status status;
+ u8 val;
+
+ /*
+ * Look for _DSD property specifying that the storage device on the port
+ * must use D3 to support deep platform power savings during
+ * suspend-to-idle.
+ */
+ root = pcie_find_root_port(dev);
+ if (!root)
+ return false;
+
+ adev = ACPI_COMPANION(&root->dev);
+ if (!adev)
+ return false;
+
+ /*
+ * The property is defined in the PXSX device for South complex ports
+ * and in the PEGP device for North complex ports.
+ */
+ status = acpi_get_handle(adev->handle, "PXSX", &handle);
+ if (ACPI_FAILURE(status)) {
+ status = acpi_get_handle(adev->handle, "PEGP", &handle);
+ if (ACPI_FAILURE(status))
+ return false;
+ }
+
+ if (acpi_bus_get_device(handle, &adev))
+ return false;
+
+ if (fwnode_property_read_u8(acpi_fwnode_handle(adev), "StorageD3Enable",
+ &val))
+ return false;
+ return val == 1;
+}
+#else
+static inline bool nvme_acpi_storage_d3(struct pci_dev *dev)
+{
+ return false;
+}
+#endif /* CONFIG_ACPI */
+
static void nvme_async_probe(void *data, async_cookie_t cookie)
{
struct nvme_dev *dev = data;
quirks |= check_vendor_combination_bug(pdev);
+ if (!noacpi && nvme_acpi_storage_d3(pdev)) {
+ /*
+ * Some systems use a bios work around to ask for D3 on
+ * platforms that support kernel managed suspend.
+ */
+ dev_info(&pdev->dev,
+ "platform quirk: setting simple suspend\n");
+ quirks |= NVME_QUIRK_SIMPLE_SUSPEND;
+ }
+
/*
* Double check that our mempool alloc size will cover the biggest
* command we support.