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Subject[PATCH v4 25/32] scsi: hisi_sas: add abnormal irq handler
Date
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>
---
drivers/scsi/hisi_sas/hisi_sas.h | 2 +
drivers/scsi/hisi_sas/hisi_sas_main.c | 118 +++++++++++++++++++++++++++++++++
drivers/scsi/hisi_sas/hisi_sas_v1_hw.c | 70 +++++++++++++++++++
3 files changed, 190 insertions(+)

diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
index 999f319..e5ee3c9 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 d8af4c6..1797851 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 530e771..1723dd4 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),
};

--
1.9.1


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