linux-kernel - [PATCH v3 22/23] scsi: hisi_sas: add v3 code to fill some more hw function pointers

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Message-ID: <1496241195-217678-23-git-send-email-john.garry@huawei.com>
Date:   Wed, 31 May 2017 22:33:14 +0800
From:   John Garry <john.garry@...wei.com>
To:     <jejb@...ux.vnet.ibm.com>, <martin.petersen@...cle.com>
CC:     <john.garry2@...l.dcu.ie>, <linuxarm@...wei.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <arnd@...db.de>, Xiang Chen <chenxiang66@...ilicon.com>,
        John Garry <john.garry@...wei.com>
Subject: [PATCH v3 22/23] scsi: hisi_sas: add v3 code to fill some more hw function pointers

From: Xiang Chen <chenxiang66@...ilicon.com>

Add code to fill the interface of phy_hard_reset, phy_get_max_linkrate,
and phy enable/disable.

Signed-off-by: John Garry <john.garry@...wei.com>
Signed-off-by: Xiang Chen <chenxiang66@...ilicon.com>
---
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 40 +++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 3203221..17f9ac9 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -195,6 +195,8 @@
 #define TXID_AUTO				(PORT_BASE + 0xb8)
 #define CT3_OFF		1
 #define CT3_MSK		(0x1 << CT3_OFF)
+#define TX_HARDRST_OFF          2
+#define TX_HARDRST_MSK          (0x1 << TX_HARDRST_OFF)
 #define RX_IDAF_DWORD0			(PORT_BASE + 0xc4)
 #define RXOP_CHECK_CFG_H		(PORT_BASE + 0xfc)
 #define SAS_SSP_CON_TIMER_CFG		(PORT_BASE + 0x134)
@@ -648,6 +650,14 @@ static void enable_phy_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
 	hisi_sas_phy_write32(hisi_hba, phy_no, PHY_CFG, cfg);
 }
 
+static void disable_phy_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
+{
+	u32 cfg = hisi_sas_phy_read32(hisi_hba, phy_no, PHY_CFG);
+
+	cfg &= ~PHY_CFG_ENA_MSK;
+	hisi_sas_phy_write32(hisi_hba, phy_no, PHY_CFG, cfg);
+}
+
 static void start_phy_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
 {
 	config_id_frame_v3_hw(hisi_hba, phy_no);
@@ -655,6 +665,11 @@ static void start_phy_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
 	enable_phy_v3_hw(hisi_hba, phy_no);
 }
 
+static void stop_phy_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
+{
+	disable_phy_v3_hw(hisi_hba, phy_no);
+}
+
 static void start_phys_v3_hw(struct hisi_hba *hisi_hba)
 {
 	int i;
@@ -663,6 +678,26 @@ static void start_phys_v3_hw(struct hisi_hba *hisi_hba)
 		start_phy_v3_hw(hisi_hba, i);
 }
 
+static void phy_hard_reset_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
+{
+	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
+	u32 txid_auto;
+
+	stop_phy_v3_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_v3_hw(hisi_hba, phy_no);
+}
+
+enum sas_linkrate phy_get_max_linkrate_v3_hw(void)
+{
+	return SAS_LINK_RATE_12_0_GBPS;
+}
+
 static void phys_init_v3_hw(struct hisi_hba *hisi_hba)
 {
 	start_phys_v3_hw(hisi_hba);
@@ -1977,6 +2012,10 @@ static int hisi_sas_v3_init(struct hisi_hba *hisi_hba)
 	.start_delivery = start_delivery_v3_hw,
 	.slot_complete = slot_complete_v3_hw,
 	.phys_init = phys_init_v3_hw,
+	.phy_enable = enable_phy_v3_hw,
+	.phy_disable = disable_phy_v3_hw,
+	.phy_hard_reset = phy_hard_reset_v3_hw,
+	.phy_get_max_linkrate = phy_get_max_linkrate_v3_hw,
 };
 
 static struct Scsi_Host *
@@ -2141,7 +2180,6 @@ static void hisi_sas_v3_remove(struct pci_dev *pdev)
 	pci_disable_device(pdev);
 }
 
-
 enum {
 	/* instances of the controller */
 	hip08,
-- 
1.9.1