Commit a090fc97 authored by Xingui Yang's avatar Xingui Yang Committed by Martin K. Petersen
Browse files

scsi: hisi_sas: Change DMA setup lock timeout to 2.5s 



DMA setup lock timeout protection is added when DMA setup frames are
received. It's a function outside the protocol and used to prevent SATA
disk I/Os from being delivered for a long time. The default value is 100ms,
it's too strict and easily triggered timeout when the disk is overloaded or
faulty. Based on the average I/O latency of 300 disks, we adjust the value
to 2.5s.

Signed-off-by: default avatarXingui Yang <yangxingui@huawei.com>
Signed-off-by: default avatarYihang Li <liyihang9@huawei.com>
Signed-off-by: default avatarXiang Chen <chenxiang66@hisilicon.com>
Link: https://lore.kernel.org/r/1684118481-95908-3-git-send-email-chenxiang66@hisilicon.com


Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent b68daae9

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

+4 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 
#define SATA_INITI_D2H_STORE_ADDR_LO	0x60

#define SATA_INITI_D2H_STORE_ADDR_HI	0x64

#define CFG_MAX_TAG			0x68

#define TRANS_LOCK_ICT_TIME		0X70

#define HGC_SAS_TX_OPEN_FAIL_RETRY_CTRL	0x84

#define HGC_SAS_TXFAIL_RETRY_CTRL	0x88

#define HGC_GET_ITV_TIME		0x90
@@ -634,6 +635,8 @@ static void init_reg_v3_hw(struct hisi_hba *hisi_hba) 
	hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE,

			 (u32)((1ULL << hisi_hba->queue_count) - 1));

	hisi_sas_write32(hisi_hba, CFG_MAX_TAG, 0xfff0400);

	/* time / CLK_AHB = 2.5s / 2ns = 0x4A817C80 */

	hisi_sas_write32(hisi_hba, TRANS_LOCK_ICT_TIME, 0x4A817C80);

	hisi_sas_write32(hisi_hba, HGC_SAS_TXFAIL_RETRY_CTRL, 0x108);

	hisi_sas_write32(hisi_hba, CFG_AGING_TIME, 0x1);

	hisi_sas_write32(hisi_hba, INT_COAL_EN, 0x1);
@@ -3006,6 +3009,7 @@ static const struct hisi_sas_debugfs_reg_lu debugfs_global_reg_lu[] = { 
	HISI_SAS_DEBUGFS_REG(SATA_INITI_D2H_STORE_ADDR_LO),

	HISI_SAS_DEBUGFS_REG(SATA_INITI_D2H_STORE_ADDR_HI),

	HISI_SAS_DEBUGFS_REG(CFG_MAX_TAG),

	HISI_SAS_DEBUGFS_REG(TRANS_LOCK_ICT_TIME),

	HISI_SAS_DEBUGFS_REG(HGC_SAS_TX_OPEN_FAIL_RETRY_CTRL),

	HISI_SAS_DEBUGFS_REG(HGC_SAS_TXFAIL_RETRY_CTRL),

	HISI_SAS_DEBUGFS_REG(HGC_GET_ITV_TIME),