scsi: hisi_sas: add PHY set linkrate support for v1 and v2 hw

Add the function to set PHY min and max linkrate through
sysfs interface.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org>
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 8b5ecc6..c0cd505 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas.h
+++ b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -168,6 +168,9 @@ struct hisi_sas_hw {
        void (*phy_enable)(struct hisi_hba *hisi_hba, int phy_no);
        void (*phy_disable)(struct hisi_hba *hisi_hba, int phy_no);
        void (*phy_hard_reset)(struct hisi_hba *hisi_hba, int phy_no);
+       void (*phy_set_linkrate)(struct hisi_hba *hisi_hba, int phy_no,
+                       struct sas_phy_linkrates *linkrates);
+       enum sas_linkrate (*phy_get_max_linkrate)(void);
        void (*free_device)(struct hisi_hba *hisi_hba,
                            struct hisi_sas_device *dev);
        int (*get_wideport_bitmap)(struct hisi_hba *hisi_hba, int port_id);

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 18e2194..6d6f150 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -369,9 +369,14 @@ static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
                struct sas_phy *sphy = sas_phy->phy;
 
                sphy->negotiated_linkrate = sas_phy->linkrate;
-               sphy->minimum_linkrate = phy->minimum_linkrate;
                sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
-               sphy->maximum_linkrate = phy->maximum_linkrate;
+               sphy->maximum_linkrate_hw =
+                       hisi_hba->hw->phy_get_max_linkrate();
+               if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
+                       sphy->minimum_linkrate = phy->minimum_linkrate;
+
+               if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
+                       sphy->maximum_linkrate = phy->maximum_linkrate;
        }
 
        if (phy->phy_type & PORT_TYPE_SAS) {
@@ -645,6 +650,9 @@ static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
                break;
 
        case PHY_FUNC_SET_LINK_RATE:
+               hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
+               break;
+
        case PHY_FUNC_RELEASE_SPINUP_HOLD:
        default:
                return -EOPNOTSUPP;

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
index 05177fc..8a1be0b 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
@@ -843,6 +843,49 @@ static void sl_notify_v1_hw(struct hisi_hba *hisi_hba, int phy_no)
        hisi_sas_phy_write32(hisi_hba, phy_no, SL_CONTROL, sl_control);
 }
 
+static enum sas_linkrate phy_get_max_linkrate_v1_hw(void)
+{
+       return SAS_LINK_RATE_6_0_GBPS;
+}
+
+static void phy_set_linkrate_v1_hw(struct hisi_hba *hisi_hba, int phy_no,
+               struct sas_phy_linkrates *r)
+{
+       u32 prog_phy_link_rate =
+               hisi_sas_phy_read32(hisi_hba, phy_no, PROG_PHY_LINK_RATE);
+       struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
+       struct asd_sas_phy *sas_phy = &phy->sas_phy;
+       int i;
+       enum sas_linkrate min, max;
+       u32 rate_mask = 0;
+
+       if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
+               max = sas_phy->phy->maximum_linkrate;
+               min = r->minimum_linkrate;
+       } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
+               max = r->maximum_linkrate;
+               min = sas_phy->phy->minimum_linkrate;
+       } else
+               return;
+
+       sas_phy->phy->maximum_linkrate = max;
+       sas_phy->phy->minimum_linkrate = min;
+
+       min -= SAS_LINK_RATE_1_5_GBPS;
+       max -= SAS_LINK_RATE_1_5_GBPS;
+
+       for (i = 0; i <= max; i++)
+               rate_mask |= 1 << (i * 2);
+
+       prog_phy_link_rate &= ~0xff;
+       prog_phy_link_rate |= rate_mask;
+
+       hisi_sas_phy_write32(hisi_hba, phy_no, PROG_PHY_LINK_RATE,
+                       prog_phy_link_rate);
+
+       phy_hard_reset_v1_hw(hisi_hba, phy_no);
+}
+
 static int get_wideport_bitmap_v1_hw(struct hisi_hba *hisi_hba, int port_id)
 {
        int i, bitmap = 0;
@@ -1818,6 +1861,8 @@ static const struct hisi_sas_hw hisi_sas_v1_hw = {
        .phy_enable = enable_phy_v1_hw,
        .phy_disable = disable_phy_v1_hw,
        .phy_hard_reset = phy_hard_reset_v1_hw,
+       .phy_set_linkrate = phy_set_linkrate_v1_hw,
+       .phy_get_max_linkrate = phy_get_max_linkrate_v1_hw,
        .get_wideport_bitmap = get_wideport_bitmap_v1_hw,
        .max_command_entries = HISI_SAS_COMMAND_ENTRIES_V1_HW,
        .complete_hdr_size = sizeof(struct hisi_sas_complete_v1_hdr),

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index e88113a..15487f2 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -1060,6 +1060,49 @@ static void sl_notify_v2_hw(struct hisi_hba *hisi_hba, int phy_no)
        hisi_sas_phy_write32(hisi_hba, phy_no, SL_CONTROL, sl_control);
 }
 
+static enum sas_linkrate phy_get_max_linkrate_v2_hw(void)
+{
+       return SAS_LINK_RATE_12_0_GBPS;
+}
+
+static void phy_set_linkrate_v2_hw(struct hisi_hba *hisi_hba, int phy_no,
+               struct sas_phy_linkrates *r)
+{
+       u32 prog_phy_link_rate =
+               hisi_sas_phy_read32(hisi_hba, phy_no, PROG_PHY_LINK_RATE);
+       struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
+       struct asd_sas_phy *sas_phy = &phy->sas_phy;
+       int i;
+       enum sas_linkrate min, max;
+       u32 rate_mask = 0;
+
+       if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
+               max = sas_phy->phy->maximum_linkrate;
+               min = r->minimum_linkrate;
+       } else if (r->minimum_linkrate == SAS_LINK_RATE_UNKNOWN) {
+               max = r->maximum_linkrate;
+               min = sas_phy->phy->minimum_linkrate;
+       } else
+               return;
+
+       sas_phy->phy->maximum_linkrate = max;
+       sas_phy->phy->minimum_linkrate = min;
+
+       min -= SAS_LINK_RATE_1_5_GBPS;
+       max -= SAS_LINK_RATE_1_5_GBPS;
+
+       for (i = 0; i <= max; i++)
+               rate_mask |= 1 << (i * 2);
+
+       prog_phy_link_rate &= ~0xff;
+       prog_phy_link_rate |= rate_mask;
+
+       hisi_sas_phy_write32(hisi_hba, phy_no, PROG_PHY_LINK_RATE,
+                       prog_phy_link_rate);
+
+       phy_hard_reset_v2_hw(hisi_hba, phy_no);
+}
+
 static int get_wideport_bitmap_v2_hw(struct hisi_hba *hisi_hba, int port_id)
 {
        int i, bitmap = 0;
@@ -2739,6 +2782,8 @@ static const struct hisi_sas_hw hisi_sas_v2_hw = {
        .phy_enable = enable_phy_v2_hw,
        .phy_disable = disable_phy_v2_hw,
        .phy_hard_reset = phy_hard_reset_v2_hw,
+       .phy_set_linkrate = phy_set_linkrate_v2_hw,
+       .phy_get_max_linkrate = phy_get_max_linkrate_v2_hw,
        .max_command_entries = HISI_SAS_COMMAND_ENTRIES_V2_HW,
        .complete_hdr_size = sizeof(struct hisi_sas_complete_v2_hdr),
 };