linux-kernel - [PATCH] nvme-pci: avoid the deepest sleep state on ZHITAI TiPro7000 SSDs

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Message-ID: <SG2PR06MB33380A046A4E047A37B1153CCBA39@SG2PR06MB3338.apcprd06.prod.outlook.com>
Date:   Sun,  5 Jun 2022 20:36:48 +0000
From:   Ning Wang <ningwang35@...look.com>
To:     kbusch@...nel.org, axboe@...com, hch@....de, sagi@...mberg.me,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Ning Wang <ningwang35@...look.com>
Subject: [PATCH] nvme-pci: avoid the deepest sleep state on ZHITAI TiPro7000 SSDs

When ZHITAI TiPro7000 SSDs entered deepest power state(ps4)
it has the same APST sleep problem as Kingston A2000.
by chance the system crashes and displays the same dmesg info:

https://bugzilla.kernel.org/show_bug.cgi?id=195039#c65

As the Archlinux wiki suggest (enlat + exlat) < 25000 is fine
and my testing shows no system crashes ever since.
Therefore disabling the deepest power state will fix the APST sleep issue.

https://wiki.archlinux.org/title/Solid_state_drive/NVMe

This is the APST data from 'nvme id-ctrl /dev/nvme1'

NVME Identify Controller:
vid       : 0x1e49
ssvid     : 0x1e49
sn        : [...]
mn        : ZHITAI TiPro7000 1TB
fr        : ZTA32F3Y
[...]
ps    0 : mp:3.50W operational enlat:5 exlat:5 rrt:0 rrl:0
          rwt:0 rwl:0 idle_power:- active_power:-
ps    1 : mp:3.30W operational enlat:50 exlat:100 rrt:1 rrl:1
          rwt:1 rwl:1 idle_power:- active_power:-
ps    2 : mp:2.80W operational enlat:50 exlat:200 rrt:2 rrl:2
          rwt:2 rwl:2 idle_power:- active_power:-
ps    3 : mp:0.1500W non-operational enlat:500 exlat:5000 rrt:3 rrl:3
          rwt:3 rwl:3 idle_power:- active_power:-
ps    4 : mp:0.0200W non-operational enlat:2000 exlat:60000 rrt:4 rrl:4
          rwt:4 rwl:4 idle_power:- active_power:-

Signed-off-by: Ning Wang <ningwang35@...look.com>
---
 drivers/nvme/host/pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 48f4f6eb877b..92afdea107dc 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -3463,6 +3463,8 @@ static const struct pci_device_id nvme_id_table[] = {
 		.driver_data = NVME_QUIRK_BOGUS_NID, },
 	{ PCI_DEVICE(0x1e4B, 0x1202),   /* MAXIO MAP1202 */
 		.driver_data = NVME_QUIRK_BOGUS_NID, },
+	{ PCI_DEVICE(0x1e49, 0x0041),   /* ZHITAI TiPro7000 NVMe SSD */
+		.driver_data = NVME_QUIRK_NO_DEEPEST_PS, },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMAZON, 0x0061),
 		.driver_data = NVME_QUIRK_DMA_ADDRESS_BITS_48, },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMAZON, 0x0065),
-- 
2.30.2