hisi_sas: add v2 SATA interrupt handler

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index 5af20690835b23e2edb93af43bdfe374203f5639..c4a887ca48da3e3338d645fdcdbdc4ff04cb04b1 100644 (file)
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -861,6 +861,86 @@ static irqreturn_t int_chnl_int_v2_hw(int irq_no, void *p)
        return IRQ_HANDLED;
 }
 
+static irqreturn_t sata_int_v2_hw(int irq_no, void *p)
+{
+       struct hisi_sas_phy *phy = p;
+       struct hisi_hba *hisi_hba = phy->hisi_hba;
+       struct asd_sas_phy *sas_phy = &phy->sas_phy;
+       struct device *dev = &hisi_hba->pdev->dev;
+       struct  hisi_sas_initial_fis *initial_fis;
+       struct dev_to_host_fis *fis;
+       u32 ent_tmp, ent_msk, ent_int, port_id, link_rate, hard_phy_linkrate;
+       irqreturn_t res = IRQ_HANDLED;
+       u8 attached_sas_addr[SAS_ADDR_SIZE] = {0};
+       int phy_no;
+
+       phy_no = sas_phy->id;
+       initial_fis = &hisi_hba->initial_fis[phy_no];
+       fis = &initial_fis->fis;
+
+       ent_msk = hisi_sas_read32(hisi_hba, ENT_INT_SRC_MSK1);
+       hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK1, ent_msk | 1 << phy_no);
+
+       ent_int = hisi_sas_read32(hisi_hba, ENT_INT_SRC1);
+       ent_tmp = ent_int;
+       ent_int >>= ENT_INT_SRC1_D2H_FIS_CH1_OFF * (phy_no % 4);
+       if ((ent_int & ENT_INT_SRC1_D2H_FIS_CH0_MSK) == 0) {
+               dev_warn(dev, "sata int: phy%d did not receive FIS\n", phy_no);
+               hisi_sas_write32(hisi_hba, ENT_INT_SRC1, ent_tmp);
+               hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK1, ent_msk);
+               res = IRQ_NONE;
+               goto end;
+       }
+
+       if (unlikely(phy_no == 8)) {
+               u32 port_state = hisi_sas_read32(hisi_hba, PORT_STATE);
+
+               port_id = (port_state & PORT_STATE_PHY8_PORT_NUM_MSK) >>
+                         PORT_STATE_PHY8_PORT_NUM_OFF;
+               link_rate = (port_state & PORT_STATE_PHY8_CONN_RATE_MSK) >>
+                           PORT_STATE_PHY8_CONN_RATE_OFF;
+       } else {
+               port_id = hisi_sas_read32(hisi_hba, PHY_PORT_NUM_MA);
+               port_id = (port_id >> (4 * phy_no)) & 0xf;
+               link_rate = hisi_sas_read32(hisi_hba, PHY_CONN_RATE);
+               link_rate = (link_rate >> (phy_no * 4)) & 0xf;
+       }
+
+       if (port_id == 0xf) {
+               dev_err(dev, "sata int: phy%d invalid portid\n", phy_no);
+               res = IRQ_NONE;
+               goto end;
+       }
+
+       sas_phy->linkrate = link_rate;
+       hard_phy_linkrate = hisi_sas_phy_read32(hisi_hba, phy_no,
+                                               HARD_PHY_LINKRATE);
+       phy->maximum_linkrate = hard_phy_linkrate & 0xf;
+       phy->minimum_linkrate = (hard_phy_linkrate >> 4) & 0xf;
+
+       sas_phy->oob_mode = SATA_OOB_MODE;
+       /* Make up some unique SAS address */
+       attached_sas_addr[0] = 0x50;
+       attached_sas_addr[7] = phy_no;
+       memcpy(sas_phy->attached_sas_addr, attached_sas_addr, SAS_ADDR_SIZE);
+       memcpy(sas_phy->frame_rcvd, fis, sizeof(struct dev_to_host_fis));
+       dev_info(dev, "sata int phyup: phy%d link_rate=%d\n", phy_no, link_rate);
+       phy->phy_type &= ~(PORT_TYPE_SAS | PORT_TYPE_SATA);
+       phy->port_id = port_id;
+       phy->phy_type |= PORT_TYPE_SATA;
+       phy->phy_attached = 1;
+       phy->identify.device_type = SAS_SATA_DEV;
+       phy->frame_rcvd_size = sizeof(struct dev_to_host_fis);
+       phy->identify.target_port_protocols = SAS_PROTOCOL_SATA;
+       queue_work(hisi_hba->wq, &phy->phyup_ws);
+
+end:
+       hisi_sas_write32(hisi_hba, ENT_INT_SRC1, ent_tmp);
+       hisi_sas_write32(hisi_hba, ENT_INT_SRC_MSK1, ent_msk);
+
+       return res;
+}
+
 static irq_handler_t phy_interrupts[HISI_SAS_PHY_INT_NR] = {
        int_phy_updown_v2_hw,
        int_chnl_int_v2_hw,
@@ -900,6 +980,26 @@ static int interrupt_init_v2_hw(struct hisi_hba *hisi_hba)
                }
        }
 
+       for (i = 0; i < hisi_hba->n_phy; i++) {
+               struct hisi_sas_phy *phy = &hisi_hba->phy[i];
+               int idx = i + 72; /* First SATA interrupt is irq72 */
+
+               irq = irq_map[idx];
+               if (!irq) {
+                       dev_err(dev, "irq init: fail map phy interrupt %d\n",
+                               idx);
+                       return -ENOENT;
+               }
+
+               rc = devm_request_irq(dev, irq, sata_int_v2_hw, 0,
+                                     DRV_NAME " sata", phy);
+               if (rc) {
+                       dev_err(dev, "irq init: could not request "
+                               "sata interrupt %d, rc=%d\n",
+                               irq, rc);
+                       return -ENOENT;
+               }
+       }
        return 0;
 }