hisi_sas: Add abnormal irq handler

Add abnormal irq handler. This handler is concerned with phy down event.
Also add port formed and port deformed handlers.

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

3 files changed, 190 insertions, 0 deletions

diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
index 999f31955bee..e5ee3c90f7b5 100644
--- a/drivers/scsi/hisi_sas/hisi_sas.h
+++ b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -136,6 +136,7 @@ struct hisi_sas_hw {
                              struct hisi_sas_slot *slot, int abort);
         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);
         int complete_hdr_size;
 };
 
@@ -330,6 +331,7 @@ extern int hisi_sas_probe(struct platform_device *pdev,
                           const struct hisi_sas_hw *ops);
 extern int hisi_sas_remove(struct platform_device *pdev);
 
+extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy);
 extern void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba,
                                     struct sas_task *task,
                                     struct hisi_sas_slot *slot);
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index d8af4c64cd51..17978510c4f2 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -431,6 +431,72 @@ static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
         INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
 }
 
+static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
+{
+        struct sas_ha_struct *sas_ha = sas_phy->ha;
+        struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
+        struct hisi_sas_phy *phy = sas_phy->lldd_phy;
+        struct asd_sas_port *sas_port = sas_phy->port;
+        struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id];
+        unsigned long flags;
+
+        if (!sas_port)
+                return;
+
+        spin_lock_irqsave(&hisi_hba->lock, flags);
+        port->port_attached = 1;
+        port->id = phy->port_id;
+        phy->port = port;
+        sas_port->lldd_port = port;
+        spin_unlock_irqrestore(&hisi_hba->lock, flags);
+}
+
+static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no,
+                                     struct domain_device *device)
+{
+        struct hisi_sas_phy *phy;
+        struct hisi_sas_port *port;
+        struct hisi_sas_slot *slot, *slot2;
+        struct device *dev = &hisi_hba->pdev->dev;
+
+        phy = &hisi_hba->phy[phy_no];
+        port = phy->port;
+        if (!port)
+                return;
+
+        list_for_each_entry_safe(slot, slot2, &port->list, entry) {
+                struct sas_task *task;
+
+                task = slot->task;
+                if (device && task->dev != device)
+                        continue;
+
+                dev_info(dev, "Release slot [%d:%d], task [%p]:\n",
+                         slot->dlvry_queue, slot->dlvry_queue_slot, task);
+                hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
+        }
+}
+
+static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy)
+{
+        struct domain_device *device;
+        struct hisi_sas_phy *phy = sas_phy->lldd_phy;
+        struct asd_sas_port *sas_port = sas_phy->port;
+
+        list_for_each_entry(device, &sas_port->dev_list, dev_list_node)
+                hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device);
+}
+
+static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
+                        struct domain_device *device)
+{
+        struct asd_sas_port *port = device->port;
+        struct asd_sas_phy *sas_phy;
+
+        list_for_each_entry(sas_phy, &port->phy_list, port_phy_el)
+                hisi_sas_do_release_task(hisi_hba, sas_phy->id, device);
+}
+
 static void hisi_sas_dev_gone(struct domain_device *device)
 {
         struct hisi_sas_device *sas_dev = device->lldd_dev;
@@ -454,6 +520,56 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
         return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
 }
 
+
+static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
+{
+        hisi_sas_port_notify_formed(sas_phy);
+}
+
+static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
+{
+        hisi_sas_port_notify_deformed(sas_phy);
+}
+
+static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
+{
+        phy->phy_attached = 0;
+        phy->phy_type = 0;
+        phy->port = NULL;
+}
+
+void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
+{
+        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;
+
+        if (rdy) {
+                /* Phy down but ready */
+                hisi_sas_bytes_dmaed(hisi_hba, phy_no);
+                hisi_sas_port_notify_formed(sas_phy);
+        } else {
+                struct hisi_sas_port *port  = phy->port;
+
+                /* Phy down and not ready */
+                sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
+                sas_phy_disconnected(sas_phy);
+
+                if (port) {
+                        if (phy->phy_type & PORT_TYPE_SAS) {
+                                int port_id = port->id;
+
+                                if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
+                                                                       port_id))
+                                        port->port_attached = 0;
+                        } else if (phy->phy_type & PORT_TYPE_SATA)
+                                port->port_attached = 0;
+                }
+                hisi_sas_phy_disconnected(phy);
+        }
+}
+EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
+
 static struct scsi_transport_template *hisi_sas_stt;
 
 static struct scsi_host_template hisi_sas_sht = {
@@ -479,6 +595,8 @@ static struct sas_domain_function_template hisi_sas_transport_ops = {
         .lldd_dev_found         = hisi_sas_dev_found,
         .lldd_dev_gone          = hisi_sas_dev_gone,
         .lldd_execute_task      = hisi_sas_queue_command,
+        .lldd_port_formed       = hisi_sas_port_formed,
+        .lldd_port_deformed     = hisi_sas_port_deformed,
 };
 
 static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
index 530e77152bc6..1723dd453e06 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
@@ -810,6 +810,18 @@ 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 int get_wideport_bitmap_v1_hw(struct hisi_hba *hisi_hba, int port_id)
+{
+        int i, bitmap = 0;
+        u32 phy_port_num_ma = hisi_sas_read32(hisi_hba, PHY_PORT_NUM_MA);
+
+        for (i = 0; i < hisi_hba->n_phy; i++)
+                if (((phy_port_num_ma >> (i * 4)) & 0xf) == port_id)
+                        bitmap |= 1 << i;
+
+        return bitmap;
+}
+
 /**
  * This function allocates across all queues to load balance.
  * Slots are allocated from queues in a round-robin fashion.
@@ -1321,6 +1333,61 @@ end:
         return res;
 }
 
+static irqreturn_t int_abnormal_v1_hw(int irq, void *p)
+{
+        struct hisi_sas_phy *phy = p;
+        struct hisi_hba *hisi_hba = phy->hisi_hba;
+        struct device *dev = &hisi_hba->pdev->dev;
+        struct asd_sas_phy *sas_phy = &phy->sas_phy;
+        u32 irq_value, irq_mask_old;
+        int phy_no = sas_phy->id;
+
+        /* mask_int0 */
+        irq_mask_old = hisi_sas_phy_read32(hisi_hba, phy_no, CHL_INT0_MSK);
+        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0_MSK, 0x3fffff);
+
+        /* read int0 */
+        irq_value = hisi_sas_phy_read32(hisi_hba, phy_no, CHL_INT0);
+
+        if (irq_value & CHL_INT0_PHYCTRL_NOTRDY_MSK) {
+                u32 phy_state = hisi_sas_read32(hisi_hba, PHY_STATE);
+
+                hisi_sas_phy_down(hisi_hba, phy_no,
+                                  (phy_state & 1 << phy_no) ? 1 : 0);
+        }
+
+        if (irq_value & CHL_INT0_ID_TIMEOUT_MSK)
+                dev_dbg(dev, "abnormal: ID_TIMEOUT phy%d identify timeout\n",
+                        phy_no);
+
+        if (irq_value & CHL_INT0_DWS_LOST_MSK)
+                dev_dbg(dev, "abnormal: DWS_LOST phy%d dws lost\n", phy_no);
+
+        if (irq_value & CHL_INT0_SN_FAIL_NGR_MSK)
+                dev_dbg(dev, "abnormal: SN_FAIL_NGR phy%d sn fail ngr\n",
+                        phy_no);
+
+        if (irq_value & CHL_INT0_SL_IDAF_FAIL_MSK ||
+                irq_value & CHL_INT0_SL_OPAF_FAIL_MSK)
+                dev_dbg(dev, "abnormal: SL_ID/OPAF_FAIL phy%d check adr frm err\n",
+                        phy_no);
+
+        if (irq_value & CHL_INT0_SL_PS_FAIL_OFF)
+                dev_dbg(dev, "abnormal: SL_PS_FAIL phy%d fail\n", phy_no);
+
+        /* write to zero */
+        hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0, irq_value);
+
+        if (irq_value & CHL_INT0_PHYCTRL_NOTRDY_MSK)
+                hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0_MSK,
+                                0x3fffff & ~CHL_INT0_MSK_PHYCTRL_NOTRDY_MSK);
+        else
+                hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0_MSK,
+                                irq_mask_old);
+
+        return IRQ_HANDLED;
+}
+
 static irqreturn_t cq_interrupt_v1_hw(int irq, void *p)
 {
         struct hisi_sas_cq *cq = p;
@@ -1372,11 +1439,13 @@ static irqreturn_t cq_interrupt_v1_hw(int irq, void *p)
 
 static const char phy_int_names[HISI_SAS_PHY_INT_NR][32] = {
         {"Phy Up"},
+        {"Abnormal"},
 };
 
 static const char cq_int_name[32] = "cq";
 static irq_handler_t phy_interrupts[HISI_SAS_PHY_INT_NR] = {
         int_phyup_v1_hw,
+        int_abnormal_v1_hw
 };
 
 static int interrupt_init_v1_hw(struct hisi_hba *hisi_hba)
@@ -1499,6 +1568,7 @@ static const struct hisi_sas_hw hisi_sas_v1_hw = {
         .get_free_slot = get_free_slot_v1_hw,
         .start_delivery = start_delivery_v1_hw,
         .slot_complete = slot_complete_v1_hw,
+        .get_wideport_bitmap = get_wideport_bitmap_v1_hw,
         .complete_hdr_size = sizeof(struct hisi_sas_complete_v1_hdr),
 };