scsi: hisi_sas: Add v2 hw force PHY function for internal ATA command

This patch adds a force PHY function for internal ATA command for v2 hw.

Because there is an SoC bug in v2 hw, and need send an IO through each PHY
of a port to work around a bug which occurs after a controller reset.

This force PHY function will be used in the later patch.
Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hisi_sas/hisi_sas.h

@@ -180,6 +180,8 @@ struct hisi_sas_device {
 };
 
 struct hisi_sas_tmf_task {
+	int force_phy;
+	int phy_id;
 	u8 tmf;
 	u16 tag_of_task_to_be_managed;
 };

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

@@ -296,6 +296,10 @@
 #define CMD_HDR_RESP_REPORT_MSK		(0x1 << CMD_HDR_RESP_REPORT_OFF)
 #define CMD_HDR_TLR_CTRL_OFF		6
 #define CMD_HDR_TLR_CTRL_MSK		(0x3 << CMD_HDR_TLR_CTRL_OFF)
+#define CMD_HDR_PHY_ID_OFF		8
+#define CMD_HDR_PHY_ID_MSK		(0x1ff << CMD_HDR_PHY_ID_OFF)
+#define CMD_HDR_FORCE_PHY_OFF		17
+#define CMD_HDR_FORCE_PHY_MSK		(0x1 << CMD_HDR_FORCE_PHY_OFF)
 #define CMD_HDR_PORT_OFF		18
 #define CMD_HDR_PORT_MSK		(0xf << CMD_HDR_PORT_OFF)
 #define CMD_HDR_PRIORITY_OFF		27
@@ -2512,6 +2516,7 @@ static void prep_ata_v2_hw(struct hisi_hba *hisi_hba,
 	struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr;
 	struct asd_sas_port *sas_port = device->port;
 	struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
+	struct hisi_sas_tmf_task *tmf = slot->tmf;
 	u8 *buf_cmd;
 	int has_data = 0, hdr_tag = 0;
 	u32 dw1 = 0, dw2 = 0;
@@ -2524,6 +2529,12 @@ static void prep_ata_v2_hw(struct hisi_hba *hisi_hba,
 	else
 		hdr->dw0 |= cpu_to_le32(4 << CMD_HDR_CMD_OFF);
 
+	if (tmf && tmf->force_phy) {
+		hdr->dw0 |= CMD_HDR_FORCE_PHY_MSK;
+		hdr->dw0 |= cpu_to_le32((1 << tmf->phy_id)
+				<< CMD_HDR_PHY_ID_OFF);
+	}
+
 	/* dw1 */
 	switch (task->data_dir) {
 	case DMA_TO_DEVICE: