@@ -90,6 +90,11 @@ enum nvme_quirks {
* Set MEDIUM priority on SQ creation
*/
NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7),
+
+ /*
+ * Do not disable nvme when suspending(s2idle)
+ */
+ NVME_QUIRK_NO_DISABLE = (1 << 8),
};
/*
@@ -30,6 +30,7 @@
#include <linux/types.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/sed-opal.h>
+#include <linux/suspend.h>
#include "nvme.h"
@@ -2662,8 +2663,11 @@ static int nvme_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct nvme_dev *ndev = pci_get_drvdata(pdev);
+ struct nvme_ctrl *ctrl = &ndev->ctrl;
+
+ if (!(pm_suspend_via_s2idle() && (ctrl->quirks & NVME_QUIRK_NO_DISABLE)))
+ nvme_dev_disable(ndev, true);
- nvme_dev_disable(ndev, true);
return 0;
}
@@ -2767,6 +2771,8 @@ static const struct pci_device_id nvme_id_table[] = {
.driver_data = NVME_QUIRK_LIGHTNVM, },
{ PCI_DEVICE(0x1d1d, 0x2601), /* CNEX Granby */
.driver_data = NVME_QUIRK_LIGHTNVM, },
+ { PCI_VDEVICE(SK_HYNIX, 0x1527), /* Sk Hynix */
+ .driver_data = NVME_QUIRK_NO_DISABLE, },
{ PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) },
{ PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) },
{ PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2003) },
BugLink: https://bugs.launchpad.net/bugs/1801875 Call nvme_dev_disable() function leads to the power consumption goes up to 2.2 Watt during suspend-to-idle, and from SK hynix FE, they suggest us to use its own APST feature to do the power management during s2idle. After D3 is diabled and nvme_dev_disable() is not called while suspending, the power consumption drops to 0.77 Watt during s2idle. Signed-off-by: AceLan Kao <acelan.kao@canonical.com> --- drivers/nvme/host/nvme.h | 5 +++++ drivers/nvme/host/pci.c | 8 +++++++- 2 files changed, 12 insertions(+), 1 deletion(-)