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Date: Thu, 19 Jan 2017 00:32:50 +0800 From: John Garry <john.garry@...wei.com> To: <jejb@...ux.vnet.ibm.com>, <martin.petersen@...cle.com> CC: <linuxarm@...wei.com>, <zhangfei.gao@...aro.org>, <xuwei5@...ilicon.com>, <john.garry2@...l.dcu.ie>, <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Xiang Chen <chenxiang66@...ilicon.com>, "John Garry" <john.garry@...wei.com> Subject: [PATCH 4/7] scsi: hisi_sas: modify hard reset for directed-attached disk From: Xiang Chen <chenxiang66@...ilicon.com> Correctly set registers in v2 for root PHY hardreset for directly attached disk. Signed-off-by: Xiang Chen <chenxiang66@...ilicon.com> Signed-off-by: John Garry <john.garry@...wei.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 452e329..7519772 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) @@ -1075,7 +1077,15 @@ 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); } -- 1.9.1
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