From: AceLan Kao <acelan.kao@canonical.com>
To: Keith Busch <keith.busch@intel.com>, Jens Axboe <axboe@fb.com>,
Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
Bjorn Helgaas <bhelgaas@google.com>,
linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org
Subject: [PATCH v2 2/2] nvme: add quirk to not call disable function when suspending
Date: Tue, 6 Nov 2018 15:12:14 +0800 [thread overview]
Message-ID: <20181106071214.12745-2-acelan.kao@canonical.com> (raw)
In-Reply-To: <20181106071214.12745-1-acelan.kao@canonical.com>
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.
V2:
- replace PCI_DEVICE with PCI_VDEVICE
- replace 0x1c5c with SK_HYNIX
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(-)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index cee79cb388af..35d260a4cf46 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -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),
};
/*
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index c33bb201b884..13a2d6b2d047 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -31,6 +31,7 @@
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/sed-opal.h>
#include <linux/pci-p2pdma.h>
+#include <linux/suspend.h>
#include "nvme.h"
@@ -2612,8 +2613,11 @@ 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;
}
@@ -2716,6 +2720,8 @@ 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) },
--
2.17.1
next prev parent reply other threads:[~2018-11-06 7:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-06 7:12 [PATCH v2 1/2] pci: prevent sk hynix nvme from entering D3 AceLan Kao
2018-11-06 7:12 ` AceLan Kao [this message]
2018-11-09 0:21 ` Bjorn Helgaas
2018-11-15 7:16 ` Kai Heng Feng
2018-11-15 14:58 ` Bjorn Helgaas
2018-11-15 17:30 ` Bjorn Helgaas
2018-11-16 7:49 ` Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181106071214.12745-2-acelan.kao@canonical.com \
--to=acelan.kao@canonical.com \
--cc=axboe@fb.com \
--cc=bhelgaas@google.com \
--cc=hch@lst.de \
--cc=keith.busch@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nvme@lists.infradead.org \
--cc=linux-pci@vger.kernel.org \
--cc=sagi@grimberg.me \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).