From 0edef7e46c24b86dc51e6ba7e22c3070ced7328c Mon Sep 17 00:00:00 2001
From: Xiang Chen <chenxiang66@hisilicon.com>
Date: Fri, 20 Jan 2017 20:45:21 +0800
Subject: [PATCH] scsi: hisi_sas: modify hard reset for directed-attached disk
Correctly set registers in v2 for root PHY hardreset for directly
attached disk.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index 93fcedaa583ff..2e776b70be8fd 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -207,6 +207,8 @@
#define TXID_AUTO (PORT_BASE + 0xb8)
#define TXID_AUTO_CT3_OFF 1
#define TXID_AUTO_CT3_MSK (0x1 << TXID_AUTO_CT3_OFF)
+#define TX_HARDRST_OFF 2
+#define TX_HARDRST_MSK (0x1 << TX_HARDRST_OFF)
#define RX_IDAF_DWORD0 (PORT_BASE + 0xc4)
#define RX_IDAF_DWORD1 (PORT_BASE + 0xc8)
#define RX_IDAF_DWORD2 (PORT_BASE + 0xcc)
@@ -1078,7 +1080,15 @@ static void stop_phy_v2_hw(struct hisi_hba *hisi_hba, int phy_no)
static void phy_hard_reset_v2_hw(struct hisi_hba *hisi_hba, int phy_no)
{
+ struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
+ u32 txid_auto;
+
stop_phy_v2_hw(hisi_hba, phy_no);
+ if (phy->identify.device_type == SAS_END_DEVICE) {
+ txid_auto = hisi_sas_phy_read32(hisi_hba, phy_no, TXID_AUTO);
+ hisi_sas_phy_write32(hisi_hba, phy_no, TXID_AUTO,
+ txid_auto | TX_HARDRST_MSK);
+ }
msleep(100);
start_phy_v2_hw(hisi_hba, phy_no);
}
--
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