scsi: hisi_sas: Only process broadcast change in phy_bcast_v3_hw()

There are many BROADCAST primitives generated by the host. We are only
interested in BROADCAST (CHANGE) primitives currently, so only process
this.

We have applied this processing for v2 hw before, and it is also needed for
v3 hw.

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_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 9f1e2d03f914dd175f4187fd27040a45ee27504b..0a126a8285c64c1e70b7bd63d7f5c575e7509101 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -131,6 +131,9 @@
 #define SL_CONTROL_NOTIFY_EN_MSK       (0x1 << SL_CONTROL_NOTIFY_EN_OFF)
 #define SL_CTA_OFF             17
 #define SL_CTA_MSK             (0x1 << SL_CTA_OFF)
+#define RX_PRIMS_STATUS                        (PORT_BASE + 0x98)
+#define RX_BCAST_CHG_OFF               1
+#define RX_BCAST_CHG_MSK               (0x1 << RX_BCAST_CHG_OFF)
 #define TX_ID_DWORD0                   (PORT_BASE + 0x9c)
 #define TX_ID_DWORD1                   (PORT_BASE + 0xa0)
 #define TX_ID_DWORD2                   (PORT_BASE + 0xa4)
@@ -1256,9 +1259,12 @@ static irqreturn_t phy_bcast_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
        struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
        struct asd_sas_phy *sas_phy = &phy->sas_phy;
        struct sas_ha_struct *sas_ha = &hisi_hba->sha;
+       u32 bcast_status;
 
        hisi_sas_phy_write32(hisi_hba, phy_no, SL_RX_BCAST_CHK_MSK, 1);
-       sas_ha->notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
+       bcast_status = hisi_sas_phy_read32(hisi_hba, phy_no, RX_PRIMS_STATUS);
+       if (bcast_status & RX_BCAST_CHG_MSK)
+               sas_ha->notify_port_event(sas_phy, PORTE_BROADCAST_RCVD);
        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0,
                             CHL_INT0_SL_RX_BCST_ACK_MSK);
        hisi_sas_phy_write32(hisi_hba, phy_no, SL_RX_BCAST_CHK_MSK, 0);