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>

diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
index 60bd652..9400824 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas.h
+++ b/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;
 };

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index fafb3f1..369ef7e 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/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: