Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2467 insertions, 0 deletions

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
new file mode 100644
index 000000000..de4f41bce
--- /dev/null
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -0,0 +1,2467 @@
+/*
+ * Copyright (c) 2015 Linaro Ltd.
+ * Copyright (c) 2015 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include "hisi_sas.h"
+#include "../libsas/sas_internal.h"
+#define DRV_NAME "hisi_sas"
+
+#define DEV_IS_GONE(dev) \
+	((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
+
+static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
+				u8 *lun, struct hisi_sas_tmf_task *tmf);
+static int
+hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
+			     struct domain_device *device,
+			     int abort_flag, int tag);
+static int hisi_sas_softreset_ata_disk(struct domain_device *device);
+static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
+				void *funcdata);
+static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
+				  struct domain_device *device);
+static void hisi_sas_dev_gone(struct domain_device *device);
+
+u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
+{
+	switch (fis->command) {
+	case ATA_CMD_FPDMA_WRITE:
+	case ATA_CMD_FPDMA_READ:
+	case ATA_CMD_FPDMA_RECV:
+	case ATA_CMD_FPDMA_SEND:
+	case ATA_CMD_NCQ_NON_DATA:
+		return HISI_SAS_SATA_PROTOCOL_FPDMA;
+
+	case ATA_CMD_DOWNLOAD_MICRO:
+	case ATA_CMD_ID_ATA:
+	case ATA_CMD_PMP_READ:
+	case ATA_CMD_READ_LOG_EXT:
+	case ATA_CMD_PIO_READ:
+	case ATA_CMD_PIO_READ_EXT:
+	case ATA_CMD_PMP_WRITE:
+	case ATA_CMD_WRITE_LOG_EXT:
+	case ATA_CMD_PIO_WRITE:
+	case ATA_CMD_PIO_WRITE_EXT:
+		return HISI_SAS_SATA_PROTOCOL_PIO;
+
+	case ATA_CMD_DSM:
+	case ATA_CMD_DOWNLOAD_MICRO_DMA:
+	case ATA_CMD_PMP_READ_DMA:
+	case ATA_CMD_PMP_WRITE_DMA:
+	case ATA_CMD_READ:
+	case ATA_CMD_READ_EXT:
+	case ATA_CMD_READ_LOG_DMA_EXT:
+	case ATA_CMD_READ_STREAM_DMA_EXT:
+	case ATA_CMD_TRUSTED_RCV_DMA:
+	case ATA_CMD_TRUSTED_SND_DMA:
+	case ATA_CMD_WRITE:
+	case ATA_CMD_WRITE_EXT:
+	case ATA_CMD_WRITE_FUA_EXT:
+	case ATA_CMD_WRITE_QUEUED:
+	case ATA_CMD_WRITE_LOG_DMA_EXT:
+	case ATA_CMD_WRITE_STREAM_DMA_EXT:
+	case ATA_CMD_ZAC_MGMT_IN:
+		return HISI_SAS_SATA_PROTOCOL_DMA;
+
+	case ATA_CMD_CHK_POWER:
+	case ATA_CMD_DEV_RESET:
+	case ATA_CMD_EDD:
+	case ATA_CMD_FLUSH:
+	case ATA_CMD_FLUSH_EXT:
+	case ATA_CMD_VERIFY:
+	case ATA_CMD_VERIFY_EXT:
+	case ATA_CMD_SET_FEATURES:
+	case ATA_CMD_STANDBY:
+	case ATA_CMD_STANDBYNOW1:
+	case ATA_CMD_ZAC_MGMT_OUT:
+		return HISI_SAS_SATA_PROTOCOL_NONDATA;
+
+	case ATA_CMD_SET_MAX:
+		switch (fis->features) {
+		case ATA_SET_MAX_PASSWD:
+		case ATA_SET_MAX_LOCK:
+			return HISI_SAS_SATA_PROTOCOL_PIO;
+
+		case ATA_SET_MAX_PASSWD_DMA:
+		case ATA_SET_MAX_UNLOCK_DMA:
+			return HISI_SAS_SATA_PROTOCOL_DMA;
+
+		default:
+			return HISI_SAS_SATA_PROTOCOL_NONDATA;
+		}
+
+	default:
+	{
+		if (direction == DMA_NONE)
+			return HISI_SAS_SATA_PROTOCOL_NONDATA;
+		return HISI_SAS_SATA_PROTOCOL_PIO;
+	}
+	}
+}
+EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
+
+void hisi_sas_sata_done(struct sas_task *task,
+			    struct hisi_sas_slot *slot)
+{
+	struct task_status_struct *ts = &task->task_status;
+	struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
+	struct hisi_sas_status_buffer *status_buf =
+			hisi_sas_status_buf_addr_mem(slot);
+	u8 *iu = &status_buf->iu[0];
+	struct dev_to_host_fis *d2h =  (struct dev_to_host_fis *)iu;
+
+	resp->frame_len = sizeof(struct dev_to_host_fis);
+	memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
+
+	ts->buf_valid_size = sizeof(*resp);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
+
+int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
+{
+	struct ata_queued_cmd *qc = task->uldd_task;
+
+	if (qc) {
+		if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
+			qc->tf.command == ATA_CMD_FPDMA_READ) {
+			*tag = qc->tag;
+			return 1;
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
+
+/*
+ * This function assumes linkrate mask fits in 8 bits, which it
+ * does for all HW versions supported.
+ */
+u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max)
+{
+	u16 rate = 0;
+	int i;
+
+	max -= SAS_LINK_RATE_1_5_GBPS;
+	for (i = 0; i <= max; i++)
+		rate |= 1 << (i * 2);
+	return rate;
+}
+EXPORT_SYMBOL_GPL(hisi_sas_get_prog_phy_linkrate_mask);
+
+static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
+{
+	return device->port->ha->lldd_ha;
+}
+
+struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
+{
+	return container_of(sas_port, struct hisi_sas_port, sas_port);
+}
+EXPORT_SYMBOL_GPL(to_hisi_sas_port);
+
+void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
+{
+	int phy_no;
+
+	for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
+		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
+
+static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
+{
+	void *bitmap = hisi_hba->slot_index_tags;
+
+	clear_bit(slot_idx, bitmap);
+}
+
+static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
+{
+	hisi_sas_slot_index_clear(hisi_hba, slot_idx);
+}
+
+static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
+{
+	void *bitmap = hisi_hba->slot_index_tags;
+
+	set_bit(slot_idx, bitmap);
+}
+
+static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
+{
+	unsigned int index;
+	void *bitmap = hisi_hba->slot_index_tags;
+
+	index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
+			hisi_hba->last_slot_index + 1);
+	if (index >= hisi_hba->slot_index_count) {
+		index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
+					   0);
+		if (index >= hisi_hba->slot_index_count)
+			return -SAS_QUEUE_FULL;
+	}
+	hisi_sas_slot_index_set(hisi_hba, index);
+	*slot_idx = index;
+	hisi_hba->last_slot_index = index;
+
+	return 0;
+}
+
+static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
+{
+	int i;
+
+	for (i = 0; i < hisi_hba->slot_index_count; ++i)
+		hisi_sas_slot_index_clear(hisi_hba, i);
+}
+
+void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
+			     struct hisi_sas_slot *slot)
+{
+	struct hisi_sas_dq *dq = &hisi_hba->dq[slot->dlvry_queue];
+	unsigned long flags;
+
+	if (task) {
+		struct device *dev = hisi_hba->dev;
+
+		if (!task->lldd_task)
+			return;
+
+		task->lldd_task = NULL;
+
+		if (!sas_protocol_ata(task->task_proto))
+			if (slot->n_elem)
+				dma_unmap_sg(dev, task->scatter,
+					     task->num_scatter,
+					     task->data_dir);
+	}
+
+
+	spin_lock_irqsave(&dq->lock, flags);
+	list_del_init(&slot->entry);
+	spin_unlock_irqrestore(&dq->lock, flags);
+
+	memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
+
+	spin_lock_irqsave(&hisi_hba->lock, flags);
+	hisi_sas_slot_index_free(hisi_hba, slot->idx);
+	spin_unlock_irqrestore(&hisi_hba->lock, flags);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
+
+static void hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
+				  struct hisi_sas_slot *slot)
+{
+	hisi_hba->hw->prep_smp(hisi_hba, slot);
+}
+
+static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
+				  struct hisi_sas_slot *slot)
+{
+	hisi_hba->hw->prep_ssp(hisi_hba, slot);
+}
+
+static void hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
+				  struct hisi_sas_slot *slot)
+{
+	hisi_hba->hw->prep_stp(hisi_hba, slot);
+}
+
+static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
+		struct hisi_sas_slot *slot,
+		int device_id, int abort_flag, int tag_to_abort)
+{
+	hisi_hba->hw->prep_abort(hisi_hba, slot,
+			device_id, abort_flag, tag_to_abort);
+}
+
+static int hisi_sas_task_prep(struct sas_task *task,
+			      struct hisi_sas_dq **dq_pointer,
+			      bool is_tmf, struct hisi_sas_tmf_task *tmf,
+			      int *pass)
+{
+	struct domain_device *device = task->dev;
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+	struct hisi_sas_device *sas_dev = device->lldd_dev;
+	struct hisi_sas_port *port;
+	struct hisi_sas_slot *slot;
+	struct hisi_sas_cmd_hdr	*cmd_hdr_base;
+	struct asd_sas_port *sas_port = device->port;
+	struct device *dev = hisi_hba->dev;
+	int dlvry_queue_slot, dlvry_queue, rc, slot_idx;
+	int n_elem = 0, n_elem_req = 0, n_elem_resp = 0;
+	struct hisi_sas_dq *dq;
+	unsigned long flags;
+	int wr_q_index;
+
+	if (!sas_port) {
+		struct task_status_struct *ts = &task->task_status;
+
+		ts->resp = SAS_TASK_UNDELIVERED;
+		ts->stat = SAS_PHY_DOWN;
+		/*
+		 * libsas will use dev->port, should
+		 * not call task_done for sata
+		 */
+		if (device->dev_type != SAS_SATA_DEV)
+			task->task_done(task);
+		return -ECOMM;
+	}
+
+	if (DEV_IS_GONE(sas_dev)) {
+		if (sas_dev)
+			dev_info(dev, "task prep: device %d not ready\n",
+				 sas_dev->device_id);
+		else
+			dev_info(dev, "task prep: device %016llx not ready\n",
+				 SAS_ADDR(device->sas_addr));
+
+		return -ECOMM;
+	}
+
+	*dq_pointer = dq = sas_dev->dq;
+
+	port = to_hisi_sas_port(sas_port);
+	if (port && !port->port_attached) {
+		dev_info(dev, "task prep: %s port%d not attach device\n",
+			 (dev_is_sata(device)) ?
+			 "SATA/STP" : "SAS",
+			 device->port->id);
+
+		return -ECOMM;
+	}
+
+	if (!sas_protocol_ata(task->task_proto)) {
+		unsigned int req_len, resp_len;
+
+		if (task->num_scatter) {
+			n_elem = dma_map_sg(dev, task->scatter,
+					    task->num_scatter, task->data_dir);
+			if (!n_elem) {
+				rc = -ENOMEM;
+				goto prep_out;
+			}
+		} else if (task->task_proto & SAS_PROTOCOL_SMP) {
+			n_elem_req = dma_map_sg(dev, &task->smp_task.smp_req,
+						1, DMA_TO_DEVICE);
+			if (!n_elem_req) {
+				rc = -ENOMEM;
+				goto prep_out;
+			}
+			req_len = sg_dma_len(&task->smp_task.smp_req);
+			if (req_len & 0x3) {
+				rc = -EINVAL;
+				goto err_out_dma_unmap;
+			}
+			n_elem_resp = dma_map_sg(dev, &task->smp_task.smp_resp,
+						 1, DMA_FROM_DEVICE);
+			if (!n_elem_resp) {
+				rc = -ENOMEM;
+				goto err_out_dma_unmap;
+			}
+			resp_len = sg_dma_len(&task->smp_task.smp_resp);
+			if (resp_len & 0x3) {
+				rc = -EINVAL;
+				goto err_out_dma_unmap;
+			}
+		}
+	} else
+		n_elem = task->num_scatter;
+
+	if (n_elem > HISI_SAS_SGE_PAGE_CNT) {
+		dev_err(dev, "task prep: n_elem(%d) > HISI_SAS_SGE_PAGE_CNT",
+			n_elem);
+		rc = -EINVAL;
+		goto err_out_dma_unmap;
+	}
+
+	spin_lock_irqsave(&hisi_hba->lock, flags);
+	if (hisi_hba->hw->slot_index_alloc)
+		rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
+						    device);
+	else
+		rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
+	spin_unlock_irqrestore(&hisi_hba->lock, flags);
+	if (rc)
+		goto err_out_dma_unmap;
+
+	slot = &hisi_hba->slot_info[slot_idx];
+
+	spin_lock_irqsave(&dq->lock, flags);
+	wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
+	if (wr_q_index < 0) {
+		spin_unlock_irqrestore(&dq->lock, flags);
+		rc = -EAGAIN;
+		goto err_out_tag;
+	}
+
+	list_add_tail(&slot->delivery, &dq->list);
+	list_add_tail(&slot->entry, &sas_dev->list);
+	spin_unlock_irqrestore(&dq->lock, flags);
+
+	dlvry_queue = dq->id;
+	dlvry_queue_slot = wr_q_index;
+
+	slot->n_elem = n_elem;
+	slot->dlvry_queue = dlvry_queue;
+	slot->dlvry_queue_slot = dlvry_queue_slot;
+	cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
+	slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
+	slot->task = task;
+	slot->port = port;
+	slot->tmf = tmf;
+	slot->is_internal = is_tmf;
+	task->lldd_task = slot;
+
+	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
+	memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
+	memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
+
+	switch (task->task_proto) {
+	case SAS_PROTOCOL_SMP:
+		hisi_sas_task_prep_smp(hisi_hba, slot);
+		break;
+	case SAS_PROTOCOL_SSP:
+		hisi_sas_task_prep_ssp(hisi_hba, slot);
+		break;
+	case SAS_PROTOCOL_SATA:
+	case SAS_PROTOCOL_STP:
+	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
+		hisi_sas_task_prep_ata(hisi_hba, slot);
+		break;
+	default:
+		dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
+			task->task_proto);
+		break;
+	}
+
+	spin_lock_irqsave(&task->task_state_lock, flags);
+	task->task_state_flags |= SAS_TASK_AT_INITIATOR;
+	spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+	++(*pass);
+	WRITE_ONCE(slot->ready, 1);
+
+	return 0;
+
+err_out_tag:
+	spin_lock_irqsave(&hisi_hba->lock, flags);
+	hisi_sas_slot_index_free(hisi_hba, slot_idx);
+	spin_unlock_irqrestore(&hisi_hba->lock, flags);
+err_out_dma_unmap:
+	if (!sas_protocol_ata(task->task_proto)) {
+		if (task->num_scatter) {
+			dma_unmap_sg(dev, task->scatter, task->num_scatter,
+			     task->data_dir);
+		} else if (task->task_proto & SAS_PROTOCOL_SMP) {
+			if (n_elem_req)
+				dma_unmap_sg(dev, &task->smp_task.smp_req,
+					     1, DMA_TO_DEVICE);
+			if (n_elem_resp)
+				dma_unmap_sg(dev, &task->smp_task.smp_resp,
+					     1, DMA_FROM_DEVICE);
+		}
+	}
+prep_out:
+	dev_err(dev, "task prep: failed[%d]!\n", rc);
+	return rc;
+}
+
+static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
+			      bool is_tmf, struct hisi_sas_tmf_task *tmf)
+{
+	u32 rc;
+	u32 pass = 0;
+	unsigned long flags;
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
+	struct device *dev = hisi_hba->dev;
+	struct hisi_sas_dq *dq = NULL;
+
+	if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
+		/*
+		 * For IOs from upper layer, it may already disable preempt
+		 * in the IO path, if disable preempt again in down(),
+		 * function schedule() will report schedule_bug(), so check
+		 * preemptible() before goto down().
+		 */
+		if (!preemptible())
+			return -EINVAL;
+
+		down(&hisi_hba->sem);
+		up(&hisi_hba->sem);
+	}
+
+	/* protect task_prep and start_delivery sequence */
+	rc = hisi_sas_task_prep(task, &dq, is_tmf, tmf, &pass);
+	if (rc)
+		dev_err(dev, "task exec: failed[%d]!\n", rc);
+
+	if (likely(pass)) {
+		spin_lock_irqsave(&dq->lock, flags);
+		hisi_hba->hw->start_delivery(dq);
+		spin_unlock_irqrestore(&dq->lock, flags);
+	}
+
+	return rc;
+}
+
+static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
+{
+	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;
+
+	if (!phy->phy_attached)
+		return;
+
+	sas_ha = &hisi_hba->sha;
+	sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
+
+	if (sas_phy->phy) {
+		struct sas_phy *sphy = sas_phy->phy;
+
+		sphy->negotiated_linkrate = sas_phy->linkrate;
+		sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
+		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) {
+		struct sas_identify_frame *id;
+
+		id = (struct sas_identify_frame *)phy->frame_rcvd;
+		id->dev_type = phy->identify.device_type;
+		id->initiator_bits = SAS_PROTOCOL_ALL;
+		id->target_bits = phy->identify.target_port_protocols;
+	} else if (phy->phy_type & PORT_TYPE_SATA) {
+		/*Nothing*/
+	}
+
+	sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
+	sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
+}
+
+static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
+{
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+	struct hisi_sas_device *sas_dev = NULL;
+	unsigned long flags;
+	int last = hisi_hba->last_dev_id;
+	int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
+	int i;
+
+	spin_lock_irqsave(&hisi_hba->lock, flags);
+	for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
+		if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
+			int queue = i % hisi_hba->queue_count;
+			struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
+
+			hisi_hba->devices[i].device_id = i;
+			sas_dev = &hisi_hba->devices[i];
+			sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
+			sas_dev->dev_type = device->dev_type;
+			sas_dev->hisi_hba = hisi_hba;
+			sas_dev->sas_device = device;
+			sas_dev->dq = dq;
+			INIT_LIST_HEAD(&hisi_hba->devices[i].list);
+			break;
+		}
+		i++;
+	}
+	hisi_hba->last_dev_id = i;
+	spin_unlock_irqrestore(&hisi_hba->lock, flags);
+
+	return sas_dev;
+}
+
+#define HISI_SAS_SRST_ATA_DISK_CNT 3
+static int hisi_sas_init_device(struct domain_device *device)
+{
+	int rc = TMF_RESP_FUNC_COMPLETE;
+	struct scsi_lun lun;
+	struct hisi_sas_tmf_task tmf_task;
+	int retry = HISI_SAS_SRST_ATA_DISK_CNT;
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+
+	switch (device->dev_type) {
+	case SAS_END_DEVICE:
+		int_to_scsilun(0, &lun);
+
+		tmf_task.tmf = TMF_CLEAR_TASK_SET;
+		rc = hisi_sas_debug_issue_ssp_tmf(device, lun.scsi_lun,
+						  &tmf_task);
+		if (rc == TMF_RESP_FUNC_COMPLETE)
+			hisi_sas_release_task(hisi_hba, device);
+		break;
+	case SAS_SATA_DEV:
+	case SAS_SATA_PM:
+	case SAS_SATA_PM_PORT:
+	case SAS_SATA_PENDING:
+		while (retry-- > 0) {
+			rc = hisi_sas_softreset_ata_disk(device);
+			if (!rc)
+				break;
+		}
+		break;
+	default:
+		break;
+	}
+
+	return rc;
+}
+
+static int hisi_sas_dev_found(struct domain_device *device)
+{
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+	struct domain_device *parent_dev = device->parent;
+	struct hisi_sas_device *sas_dev;
+	struct device *dev = hisi_hba->dev;
+	int rc;
+
+	if (hisi_hba->hw->alloc_dev)
+		sas_dev = hisi_hba->hw->alloc_dev(device);
+	else
+		sas_dev = hisi_sas_alloc_dev(device);
+	if (!sas_dev) {
+		dev_err(dev, "fail alloc dev: max support %d devices\n",
+			HISI_SAS_MAX_DEVICES);
+		return -EINVAL;
+	}
+
+	device->lldd_dev = sas_dev;
+	hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
+
+	if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
+		int phy_no;
+		u8 phy_num = parent_dev->ex_dev.num_phys;
+		struct ex_phy *phy;
+
+		for (phy_no = 0; phy_no < phy_num; phy_no++) {
+			phy = &parent_dev->ex_dev.ex_phy[phy_no];
+			if (SAS_ADDR(phy->attached_sas_addr) ==
+				SAS_ADDR(device->sas_addr))
+				break;
+		}
+
+		if (phy_no == phy_num) {
+			dev_info(dev, "dev found: no attached "
+				 "dev:%016llx at ex:%016llx\n",
+				 SAS_ADDR(device->sas_addr),
+				 SAS_ADDR(parent_dev->sas_addr));
+			rc = -EINVAL;
+			goto err_out;
+		}
+	}
+
+	dev_info(dev, "dev[%d:%x] found\n",
+		sas_dev->device_id, sas_dev->dev_type);
+
+	rc = hisi_sas_init_device(device);
+	if (rc)
+		goto err_out;
+	return 0;
+
+err_out:
+	hisi_sas_dev_gone(device);
+	return rc;
+}
+
+int hisi_sas_slave_configure(struct scsi_device *sdev)
+{
+	struct domain_device *dev = sdev_to_domain_dev(sdev);
+	int ret = sas_slave_configure(sdev);
+
+	if (ret)
+		return ret;
+	if (!dev_is_sata(dev))
+		sas_change_queue_depth(sdev, 64);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
+
+void hisi_sas_scan_start(struct Scsi_Host *shost)
+{
+	struct hisi_hba *hisi_hba = shost_priv(shost);
+
+	hisi_hba->hw->phys_init(hisi_hba);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
+
+int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
+{
+	struct hisi_hba *hisi_hba = shost_priv(shost);
+	struct sas_ha_struct *sha = &hisi_hba->sha;
+
+	/* Wait for PHY up interrupt to occur */
+	if (time < HZ)
+		return 0;
+
+	sas_drain_work(sha);
+	return 1;
+}
+EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
+
+static void hisi_sas_phyup_work(struct work_struct *work)
+{
+	struct hisi_sas_phy *phy =
+		container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
+	struct hisi_hba *hisi_hba = phy->hisi_hba;
+	struct asd_sas_phy *sas_phy = &phy->sas_phy;
+	int phy_no = sas_phy->id;
+
+	if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
+		hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
+	hisi_sas_bytes_dmaed(hisi_hba, phy_no);
+}
+
+static void hisi_sas_linkreset_work(struct work_struct *work)
+{
+	struct hisi_sas_phy *phy =
+		container_of(work, typeof(*phy), works[HISI_PHYE_LINK_RESET]);
+	struct asd_sas_phy *sas_phy = &phy->sas_phy;
+
+	hisi_sas_control_phy(sas_phy, PHY_FUNC_LINK_RESET, NULL);
+}
+
+static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
+	[HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
+	[HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
+};
+
+bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
+				enum hisi_sas_phy_event event)
+{
+	struct hisi_hba *hisi_hba = phy->hisi_hba;
+
+	if (WARN_ON(event >= HISI_PHYES_NUM))
+		return false;
+
+	return queue_work(hisi_hba->wq, &phy->works[event]);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_notify_phy_event);
+
+static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
+{
+	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
+	struct asd_sas_phy *sas_phy = &phy->sas_phy;
+	int i;
+
+	phy->hisi_hba = hisi_hba;
+	phy->port = NULL;
+	phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
+	phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
+	sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
+	sas_phy->class = SAS;
+	sas_phy->iproto = SAS_PROTOCOL_ALL;
+	sas_phy->tproto = 0;
+	sas_phy->type = PHY_TYPE_PHYSICAL;
+	sas_phy->role = PHY_ROLE_INITIATOR;
+	sas_phy->oob_mode = OOB_NOT_CONNECTED;
+	sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
+	sas_phy->id = phy_no;
+	sas_phy->sas_addr = &hisi_hba->sas_addr[0];
+	sas_phy->frame_rcvd = &phy->frame_rcvd[0];
+	sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
+	sas_phy->lldd_phy = phy;
+
+	for (i = 0; i < HISI_PHYES_NUM; i++)
+		INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
+
+	spin_lock_init(&phy->lock);
+}
+
+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;
+	unsigned long flags;
+
+	if (!sas_port)
+		return;
+
+	port = to_hisi_sas_port(sas_port);
+	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, struct sas_task *task,
+				     struct hisi_sas_slot *slot)
+{
+	if (task) {
+		unsigned long flags;
+		struct task_status_struct *ts;
+
+		ts = &task->task_status;
+
+		ts->resp = SAS_TASK_COMPLETE;
+		ts->stat = SAS_ABORTED_TASK;
+		spin_lock_irqsave(&task->task_state_lock, flags);
+		task->task_state_flags &=
+			~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
+		if (!slot->is_internal && task->task_proto != SAS_PROTOCOL_SMP)
+			task->task_state_flags |= SAS_TASK_STATE_DONE;
+		spin_unlock_irqrestore(&task->task_state_lock, flags);
+	}
+
+	hisi_sas_slot_task_free(hisi_hba, task, slot);
+}
+
+static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
+			struct domain_device *device)
+{
+	struct hisi_sas_slot *slot, *slot2;
+	struct hisi_sas_device *sas_dev = device->lldd_dev;
+
+	list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
+		hisi_sas_do_release_task(hisi_hba, slot->task, slot);
+}
+
+void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
+{
+	struct hisi_sas_device *sas_dev;
+	struct domain_device *device;
+	int i;
+
+	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
+		sas_dev = &hisi_hba->devices[i];
+		device = sas_dev->sas_device;
+
+		if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
+		    !device)
+			continue;
+
+		hisi_sas_release_task(hisi_hba, device);
+	}
+}
+EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
+
+static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
+				struct domain_device *device)
+{
+	if (hisi_hba->hw->dereg_device)
+		hisi_hba->hw->dereg_device(hisi_hba, device);
+}
+
+static void hisi_sas_dev_gone(struct domain_device *device)
+{
+	struct hisi_sas_device *sas_dev = device->lldd_dev;
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+	struct device *dev = hisi_hba->dev;
+
+	dev_info(dev, "dev[%d:%x] is gone\n",
+		 sas_dev->device_id, sas_dev->dev_type);
+
+	if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
+		hisi_sas_internal_task_abort(hisi_hba, device,
+				     HISI_SAS_INT_ABT_DEV, 0);
+
+		hisi_sas_dereg_device(hisi_hba, device);
+
+		down(&hisi_hba->sem);
+		hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
+		up(&hisi_hba->sem);
+		device->lldd_dev = NULL;
+	}
+
+	if (hisi_hba->hw->free_device)
+		hisi_hba->hw->free_device(sas_dev);
+	sas_dev->dev_type = SAS_PHY_UNUSED;
+}
+
+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 int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
+			struct sas_phy_linkrates *r)
+{
+	struct sas_phy_linkrates _r;
+
+	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
+	struct asd_sas_phy *sas_phy = &phy->sas_phy;
+	enum sas_linkrate min, max;
+
+	if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
+		return -EINVAL;
+
+	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 -EINVAL;
+
+	_r.maximum_linkrate = max;
+	_r.minimum_linkrate = min;
+
+	sas_phy->phy->maximum_linkrate = max;
+	sas_phy->phy->minimum_linkrate = min;
+
+	hisi_hba->hw->phy_disable(hisi_hba, phy_no);
+	msleep(100);
+	hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
+	hisi_hba->hw->phy_start(hisi_hba, phy_no);
+
+	return 0;
+}
+
+static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
+				void *funcdata)
+{
+	struct sas_ha_struct *sas_ha = sas_phy->ha;
+	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
+	int phy_no = sas_phy->id;
+
+	switch (func) {
+	case PHY_FUNC_HARD_RESET:
+		hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
+		break;
+
+	case PHY_FUNC_LINK_RESET:
+		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
+		msleep(100);
+		hisi_hba->hw->phy_start(hisi_hba, phy_no);
+		break;
+
+	case PHY_FUNC_DISABLE:
+		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
+		break;
+
+	case PHY_FUNC_SET_LINK_RATE:
+		return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
+	case PHY_FUNC_GET_EVENTS:
+		if (hisi_hba->hw->get_events) {
+			hisi_hba->hw->get_events(hisi_hba, phy_no);
+			break;
+		}
+		/* fallthru */
+	case PHY_FUNC_RELEASE_SPINUP_HOLD:
+	default:
+		return -EOPNOTSUPP;
+	}
+	return 0;
+}
+
+static void hisi_sas_task_done(struct sas_task *task)
+{
+	del_timer(&task->slow_task->timer);
+	complete(&task->slow_task->completion);
+}
+
+static void hisi_sas_tmf_timedout(struct timer_list *t)
+{
+	struct sas_task_slow *slow = from_timer(slow, t, timer);
+	struct sas_task *task = slow->task;
+	unsigned long flags;
+	bool is_completed = true;
+
+	spin_lock_irqsave(&task->task_state_lock, flags);
+	if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
+		task->task_state_flags |= SAS_TASK_STATE_ABORTED;
+		is_completed = false;
+	}
+	spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+	if (!is_completed)
+		complete(&task->slow_task->completion);
+}
+
+#define TASK_TIMEOUT 20
+#define TASK_RETRY 3
+#define INTERNAL_ABORT_TIMEOUT 6
+static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
+					   void *parameter, u32 para_len,
+					   struct hisi_sas_tmf_task *tmf)
+{
+	struct hisi_sas_device *sas_dev = device->lldd_dev;
+	struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
+	struct device *dev = hisi_hba->dev;
+	struct sas_task *task;
+	int res, retry;
+
+	for (retry = 0; retry < TASK_RETRY; retry++) {
+		task = sas_alloc_slow_task(GFP_KERNEL);
+		if (!task)
+			return -ENOMEM;
+
+		task->dev = device;
+		task->task_proto = device->tproto;
+
+		if (dev_is_sata(device)) {
+			task->ata_task.device_control_reg_update = 1;
+			memcpy(&task->ata_task.fis, parameter, para_len);
+		} else {
+			memcpy(&task->ssp_task, parameter, para_len);
+		}
+		task->task_done = hisi_sas_task_done;
+
+		task->slow_task->timer.function = hisi_sas_tmf_timedout;
+		task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
+		add_timer(&task->slow_task->timer);
+
+		res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
+
+		if (res) {
+			del_timer(&task->slow_task->timer);
+			dev_err(dev, "abort tmf: executing internal task failed: %d\n",
+				res);
+			goto ex_err;
+		}
+
+		wait_for_completion(&task->slow_task->completion);
+		res = TMF_RESP_FUNC_FAILED;
+		/* Even TMF timed out, return direct. */
+		if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
+			if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
+				struct hisi_sas_slot *slot = task->lldd_task;
+
+				dev_err(dev, "abort tmf: TMF task timeout and not done\n");
+				if (slot) {
+					struct hisi_sas_cq *cq =
+					       &hisi_hba->cq[slot->dlvry_queue];
+					/*
+					 * flush tasklet to avoid free'ing task
+					 * before using task in IO completion
+					 */
+					tasklet_kill(&cq->tasklet);
+					slot->task = NULL;
+				}
+
+				goto ex_err;
+			} else
+				dev_err(dev, "abort tmf: TMF task timeout\n");
+		}
+
+		if (task->task_status.resp == SAS_TASK_COMPLETE &&
+		     task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
+			res = TMF_RESP_FUNC_COMPLETE;
+			break;
+		}
+
+		if (task->task_status.resp == SAS_TASK_COMPLETE &&
+			task->task_status.stat == TMF_RESP_FUNC_SUCC) {
+			res = TMF_RESP_FUNC_SUCC;
+			break;
+		}
+
+		if (task->task_status.resp == SAS_TASK_COMPLETE &&
+		      task->task_status.stat == SAS_DATA_UNDERRUN) {
+			/* no error, but return the number of bytes of
+			 * underrun
+			 */
+			dev_warn(dev, "abort tmf: task to dev %016llx "
+				 "resp: 0x%x sts 0x%x underrun\n",
+				 SAS_ADDR(device->sas_addr),
+				 task->task_status.resp,
+				 task->task_status.stat);
+			res = task->task_status.residual;
+			break;
+		}
+
+		if (task->task_status.resp == SAS_TASK_COMPLETE &&
+			task->task_status.stat == SAS_DATA_OVERRUN) {
+			dev_warn(dev, "abort tmf: blocked task error\n");
+			res = -EMSGSIZE;
+			break;
+		}
+
+		dev_warn(dev, "abort tmf: task to dev "
+			 "%016llx resp: 0x%x status 0x%x\n",
+			 SAS_ADDR(device->sas_addr), task->task_status.resp,
+			 task->task_status.stat);
+		sas_free_task(task);
+		task = NULL;
+	}
+ex_err:
+	if (retry == TASK_RETRY)
+		dev_warn(dev, "abort tmf: executing internal task failed!\n");
+	sas_free_task(task);
+	return res;
+}
+
+static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
+		bool reset, int pmp, u8 *fis)
+{
+	struct ata_taskfile tf;
+
+	ata_tf_init(dev, &tf);
+	if (reset)
+		tf.ctl |= ATA_SRST;
+	else
+		tf.ctl &= ~ATA_SRST;
+	tf.command = ATA_CMD_DEV_RESET;
+	ata_tf_to_fis(&tf, pmp, 0, fis);
+}
+
+static int hisi_sas_softreset_ata_disk(struct domain_device *device)
+{
+	u8 fis[20] = {0};
+	struct ata_port *ap = device->sata_dev.ap;
+	struct ata_link *link;
+	int rc = TMF_RESP_FUNC_FAILED;
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+	struct device *dev = hisi_hba->dev;
+	int s = sizeof(struct host_to_dev_fis);
+
+	ata_for_each_link(link, ap, EDGE) {
+		int pmp = sata_srst_pmp(link);
+
+		hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
+		rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
+		if (rc != TMF_RESP_FUNC_COMPLETE)
+			break;
+	}
+
+	if (rc == TMF_RESP_FUNC_COMPLETE) {
+		ata_for_each_link(link, ap, EDGE) {
+			int pmp = sata_srst_pmp(link);
+
+			hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
+			rc = hisi_sas_exec_internal_tmf_task(device, fis,
+							     s, NULL);
+			if (rc != TMF_RESP_FUNC_COMPLETE)
+				dev_err(dev, "ata disk de-reset failed\n");
+		}
+	} else {
+		dev_err(dev, "ata disk reset failed\n");
+	}
+
+	if (rc == TMF_RESP_FUNC_COMPLETE)
+		hisi_sas_release_task(hisi_hba, device);
+
+	return rc;
+}
+
+static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
+				u8 *lun, struct hisi_sas_tmf_task *tmf)
+{
+	struct sas_ssp_task ssp_task;
+
+	if (!(device->tproto & SAS_PROTOCOL_SSP))
+		return TMF_RESP_FUNC_ESUPP;
+
+	memcpy(ssp_task.LUN, lun, 8);
+
+	return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
+				sizeof(ssp_task), tmf);
+}
+
+static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
+{
+	u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
+	int i;
+
+	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
+		struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
+		struct domain_device *device = sas_dev->sas_device;
+		struct asd_sas_port *sas_port;
+		struct hisi_sas_port *port;
+		struct hisi_sas_phy *phy = NULL;
+		struct asd_sas_phy *sas_phy;
+
+		if ((sas_dev->dev_type == SAS_PHY_UNUSED)
+				|| !device || !device->port)
+			continue;
+
+		sas_port = device->port;
+		port = to_hisi_sas_port(sas_port);
+
+		list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el)
+			if (state & BIT(sas_phy->id)) {
+				phy = sas_phy->lldd_phy;
+				break;
+			}
+
+		if (phy) {
+			port->id = phy->port_id;
+
+			/* Update linkrate of directly attached device. */
+			if (!device->parent)
+				device->linkrate = phy->sas_phy.linkrate;
+
+			hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
+		} else
+			port->id = 0xff;
+	}
+}
+
+static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
+			      u32 state)
+{
+	struct sas_ha_struct *sas_ha = &hisi_hba->sha;
+	struct asd_sas_port *_sas_port = NULL;
+	int phy_no;
+
+	for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
+		struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
+		struct asd_sas_phy *sas_phy = &phy->sas_phy;
+		struct asd_sas_port *sas_port = sas_phy->port;
+		bool do_port_check = !!(_sas_port != sas_port);
+
+		if (!sas_phy->phy->enabled)
+			continue;
+
+		/* Report PHY state change to libsas */
+		if (state & BIT(phy_no)) {
+			if (do_port_check && sas_port && sas_port->port_dev) {
+				struct domain_device *dev = sas_port->port_dev;
+
+				_sas_port = sas_port;
+
+				if (DEV_IS_EXPANDER(dev->dev_type))
+					sas_ha->notify_port_event(sas_phy,
+							PORTE_BROADCAST_RCVD);
+			}
+		} else if (old_state & (1 << phy_no))
+			/* PHY down but was up before */
+			hisi_sas_phy_down(hisi_hba, phy_no, 0);
+
+	}
+}
+
+static void hisi_sas_reset_init_all_devices(struct hisi_hba *hisi_hba)
+{
+	struct hisi_sas_device *sas_dev;
+	struct domain_device *device;
+	int i;
+
+	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
+		sas_dev = &hisi_hba->devices[i];
+		device = sas_dev->sas_device;
+
+		if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
+			continue;
+
+		hisi_sas_init_device(device);
+	}
+}
+
+static void hisi_sas_send_ata_reset_each_phy(struct hisi_hba *hisi_hba,
+					     struct asd_sas_port *sas_port,
+					     struct domain_device *device)
+{
+	struct hisi_sas_tmf_task tmf_task = { .force_phy = 1 };
+	struct ata_port *ap = device->sata_dev.ap;
+	struct device *dev = hisi_hba->dev;
+	int s = sizeof(struct host_to_dev_fis);
+	int rc = TMF_RESP_FUNC_FAILED;
+	struct asd_sas_phy *sas_phy;
+	struct ata_link *link;
+	u8 fis[20] = {0};
+	u32 state;
+
+	state = hisi_hba->hw->get_phys_state(hisi_hba);
+	list_for_each_entry(sas_phy, &sas_port->phy_list, port_phy_el) {
+		if (!(state & BIT(sas_phy->id)))
+			continue;
+
+		ata_for_each_link(link, ap, EDGE) {
+			int pmp = sata_srst_pmp(link);
+
+			tmf_task.phy_id = sas_phy->id;
+			hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
+			rc = hisi_sas_exec_internal_tmf_task(device, fis, s,
+							     &tmf_task);
+			if (rc != TMF_RESP_FUNC_COMPLETE) {
+				dev_err(dev, "phy%d ata reset failed rc=%d\n",
+					sas_phy->id, rc);
+				break;
+			}
+		}
+	}
+}
+
+static void hisi_sas_terminate_stp_reject(struct hisi_hba *hisi_hba)
+{
+	struct device *dev = hisi_hba->dev;
+	int port_no, rc, i;
+
+	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
+		struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
+		struct domain_device *device = sas_dev->sas_device;
+
+		if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device)
+			continue;
+
+		rc = hisi_sas_internal_task_abort(hisi_hba, device,
+						  HISI_SAS_INT_ABT_DEV, 0);
+		if (rc < 0)
+			dev_err(dev, "STP reject: abort dev failed %d\n", rc);
+	}
+
+	for (port_no = 0; port_no < hisi_hba->n_phy; port_no++) {
+		struct hisi_sas_port *port = &hisi_hba->port[port_no];
+		struct asd_sas_port *sas_port = &port->sas_port;
+		struct domain_device *port_dev = sas_port->port_dev;
+		struct domain_device *device;
+
+		if (!port_dev || !DEV_IS_EXPANDER(port_dev->dev_type))
+			continue;
+
+		/* Try to find a SATA device */
+		list_for_each_entry(device, &sas_port->dev_list,
+				    dev_list_node) {
+			if (dev_is_sata(device)) {
+				hisi_sas_send_ata_reset_each_phy(hisi_hba,
+								 sas_port,
+								 device);
+				break;
+			}
+		}
+	}
+}
+
+void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
+{
+	struct Scsi_Host *shost = hisi_hba->shost;
+
+	down(&hisi_hba->sem);
+	hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
+
+	scsi_block_requests(shost);
+	hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);
+
+	if (timer_pending(&hisi_hba->timer))
+		del_timer_sync(&hisi_hba->timer);
+
+	set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_prepare);
+
+void hisi_sas_controller_reset_done(struct hisi_hba *hisi_hba)
+{
+	struct Scsi_Host *shost = hisi_hba->shost;
+	u32 state;
+
+	/* Init and wait for PHYs to come up and all libsas event finished. */
+	hisi_hba->hw->phys_init(hisi_hba);
+	msleep(1000);
+	hisi_sas_refresh_port_id(hisi_hba);
+	clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
+	up(&hisi_hba->sem);
+
+	if (hisi_hba->reject_stp_links_msk)
+		hisi_sas_terminate_stp_reject(hisi_hba);
+	hisi_sas_reset_init_all_devices(hisi_hba);
+	scsi_unblock_requests(shost);
+	clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
+
+	state = hisi_hba->hw->get_phys_state(hisi_hba);
+	hisi_sas_rescan_topology(hisi_hba, hisi_hba->phy_state, state);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_controller_reset_done);
+
+static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
+{
+	struct device *dev = hisi_hba->dev;
+	struct Scsi_Host *shost = hisi_hba->shost;
+	int rc;
+
+	if (!hisi_hba->hw->soft_reset)
+		return -1;
+
+	if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
+		return -1;
+
+	dev_info(dev, "controller resetting...\n");
+	hisi_sas_controller_reset_prepare(hisi_hba);
+
+	rc = hisi_hba->hw->soft_reset(hisi_hba);
+	if (rc) {
+		dev_warn(dev, "controller reset failed (%d)\n", rc);
+		clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
+		up(&hisi_hba->sem);
+		scsi_unblock_requests(shost);
+		clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
+		return rc;
+	}
+
+	hisi_sas_controller_reset_done(hisi_hba);
+	dev_info(dev, "controller reset complete\n");
+
+	return 0;
+}
+
+static int hisi_sas_abort_task(struct sas_task *task)
+{
+	struct scsi_lun lun;
+	struct hisi_sas_tmf_task tmf_task;
+	struct domain_device *device = task->dev;
+	struct hisi_sas_device *sas_dev = device->lldd_dev;
+	struct hisi_hba *hisi_hba;
+	struct device *dev;
+	int rc = TMF_RESP_FUNC_FAILED;
+	unsigned long flags;
+
+	if (!sas_dev)
+		return TMF_RESP_FUNC_FAILED;
+
+	hisi_hba = dev_to_hisi_hba(task->dev);
+	dev = hisi_hba->dev;
+
+	spin_lock_irqsave(&task->task_state_lock, flags);
+	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
+		struct hisi_sas_slot *slot = task->lldd_task;
+		struct hisi_sas_cq *cq;
+
+		if (slot) {
+			/*
+			 * flush tasklet to avoid free'ing task
+			 * before using task in IO completion
+			 */
+			cq = &hisi_hba->cq[slot->dlvry_queue];
+			tasklet_kill(&cq->tasklet);
+		}
+		spin_unlock_irqrestore(&task->task_state_lock, flags);
+		rc = TMF_RESP_FUNC_COMPLETE;
+		goto out;
+	}
+	task->task_state_flags |= SAS_TASK_STATE_ABORTED;
+	spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+	sas_dev->dev_status = HISI_SAS_DEV_EH;
+	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
+		struct scsi_cmnd *cmnd = task->uldd_task;
+		struct hisi_sas_slot *slot = task->lldd_task;
+		u32 tag = slot->idx;
+		int rc2;
+
+		int_to_scsilun(cmnd->device->lun, &lun);
+		tmf_task.tmf = TMF_ABORT_TASK;
+		tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
+
+		rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
+						  &tmf_task);
+
+		rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
+						   HISI_SAS_INT_ABT_CMD, tag);
+		if (rc2 < 0) {
+			dev_err(dev, "abort task: internal abort (%d)\n", rc2);
+			return TMF_RESP_FUNC_FAILED;
+		}
+
+		/*
+		 * If the TMF finds that the IO is not in the device and also
+		 * the internal abort does not succeed, then it is safe to
+		 * free the slot.
+		 * Note: if the internal abort succeeds then the slot
+		 * will have already been completed
+		 */
+		if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
+			if (task->lldd_task)
+				hisi_sas_do_release_task(hisi_hba, task, slot);
+		}
+	} else if (task->task_proto & SAS_PROTOCOL_SATA ||
+		task->task_proto & SAS_PROTOCOL_STP) {
+		if (task->dev->dev_type == SAS_SATA_DEV) {
+			rc = hisi_sas_internal_task_abort(hisi_hba, device,
+						HISI_SAS_INT_ABT_DEV, 0);
+			if (rc < 0) {
+				dev_err(dev, "abort task: internal abort failed\n");
+				goto out;
+			}
+			hisi_sas_dereg_device(hisi_hba, device);
+			rc = hisi_sas_softreset_ata_disk(device);
+		}
+	} else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
+		/* SMP */
+		struct hisi_sas_slot *slot = task->lldd_task;
+		u32 tag = slot->idx;
+		struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
+
+		rc = hisi_sas_internal_task_abort(hisi_hba, device,
+			     HISI_SAS_INT_ABT_CMD, tag);
+		if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
+					task->lldd_task) {
+			/*
+			 * flush tasklet to avoid free'ing task
+			 * before using task in IO completion
+			 */
+			tasklet_kill(&cq->tasklet);
+			slot->task = NULL;
+		}
+	}
+
+out:
+	if (rc != TMF_RESP_FUNC_COMPLETE)
+		dev_notice(dev, "abort task: rc=%d\n", rc);
+	return rc;
+}
+
+static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
+{
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+	struct device *dev = hisi_hba->dev;
+	struct hisi_sas_tmf_task tmf_task;
+	int rc = TMF_RESP_FUNC_FAILED;
+
+	rc = hisi_sas_internal_task_abort(hisi_hba, device,
+					HISI_SAS_INT_ABT_DEV, 0);
+	if (rc < 0) {
+		dev_err(dev, "abort task set: internal abort rc=%d\n", rc);
+		return TMF_RESP_FUNC_FAILED;
+	}
+	hisi_sas_dereg_device(hisi_hba, device);
+
+	tmf_task.tmf = TMF_ABORT_TASK_SET;
+	rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
+
+	if (rc == TMF_RESP_FUNC_COMPLETE)
+		hisi_sas_release_task(hisi_hba, device);
+
+	return rc;
+}
+
+static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
+{
+	int rc = TMF_RESP_FUNC_FAILED;
+	struct hisi_sas_tmf_task tmf_task;
+
+	tmf_task.tmf = TMF_CLEAR_ACA;
+	rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
+
+	return rc;
+}
+
+static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
+{
+	struct sas_phy *local_phy = sas_get_local_phy(device);
+	int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
+			(device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+	struct sas_ha_struct *sas_ha = &hisi_hba->sha;
+	struct asd_sas_phy *sas_phy = sas_ha->sas_phy[local_phy->number];
+	struct hisi_sas_phy *phy = container_of(sas_phy,
+			struct hisi_sas_phy, sas_phy);
+	DECLARE_COMPLETION_ONSTACK(phyreset);
+
+	if (scsi_is_sas_phy_local(local_phy)) {
+		phy->in_reset = 1;
+		phy->reset_completion = &phyreset;
+	}
+
+	rc = sas_phy_reset(local_phy, reset_type);
+	sas_put_local_phy(local_phy);
+
+	if (scsi_is_sas_phy_local(local_phy)) {
+		int ret = wait_for_completion_timeout(&phyreset, 2 * HZ);
+		unsigned long flags;
+
+		spin_lock_irqsave(&phy->lock, flags);
+		phy->reset_completion = NULL;
+		phy->in_reset = 0;
+		spin_unlock_irqrestore(&phy->lock, flags);
+
+		/* report PHY down if timed out */
+		if (!ret)
+			hisi_sas_phy_down(hisi_hba, sas_phy->id, 0);
+	} else
+		msleep(2000);
+
+	return rc;
+}
+
+static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
+{
+	struct hisi_sas_device *sas_dev = device->lldd_dev;
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+	struct device *dev = hisi_hba->dev;
+	int rc = TMF_RESP_FUNC_FAILED;
+
+	if (sas_dev->dev_status != HISI_SAS_DEV_EH)
+		return TMF_RESP_FUNC_FAILED;
+	sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
+
+	rc = hisi_sas_internal_task_abort(hisi_hba, device,
+					HISI_SAS_INT_ABT_DEV, 0);
+	if (rc < 0) {
+		dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
+		return TMF_RESP_FUNC_FAILED;
+	}
+	hisi_sas_dereg_device(hisi_hba, device);
+
+	rc = hisi_sas_debug_I_T_nexus_reset(device);
+
+	if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
+		hisi_sas_release_task(hisi_hba, device);
+
+	return rc;
+}
+
+static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
+{
+	struct hisi_sas_device *sas_dev = device->lldd_dev;
+	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
+	struct device *dev = hisi_hba->dev;
+	int rc = TMF_RESP_FUNC_FAILED;
+
+	sas_dev->dev_status = HISI_SAS_DEV_EH;
+	if (dev_is_sata(device)) {
+		struct sas_phy *phy;
+
+		/* Clear internal IO and then hardreset */
+		rc = hisi_sas_internal_task_abort(hisi_hba, device,
+						  HISI_SAS_INT_ABT_DEV, 0);
+		if (rc < 0) {
+			dev_err(dev, "lu_reset: internal abort failed\n");
+			goto out;
+		}
+		hisi_sas_dereg_device(hisi_hba, device);
+
+		phy = sas_get_local_phy(device);
+
+		rc = sas_phy_reset(phy, 1);
+
+		if (rc == 0)
+			hisi_sas_release_task(hisi_hba, device);
+		sas_put_local_phy(phy);
+	} else {
+		struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };
+
+		rc = hisi_sas_internal_task_abort(hisi_hba, device,
+						HISI_SAS_INT_ABT_DEV, 0);
+		if (rc < 0) {
+			dev_err(dev, "lu_reset: internal abort failed\n");
+			goto out;
+		}
+		hisi_sas_dereg_device(hisi_hba, device);
+
+		rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
+		if (rc == TMF_RESP_FUNC_COMPLETE)
+			hisi_sas_release_task(hisi_hba, device);
+	}
+out:
+	if (rc != TMF_RESP_FUNC_COMPLETE)
+		dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
+			     sas_dev->device_id, rc);
+	return rc;
+}
+
+static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
+{
+	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
+	struct device *dev = hisi_hba->dev;
+	HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
+	int rc, i;
+
+	queue_work(hisi_hba->wq, &r.work);
+	wait_for_completion(r.completion);
+	if (!r.done)
+		return TMF_RESP_FUNC_FAILED;
+
+	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
+		struct hisi_sas_device *sas_dev = &hisi_hba->devices[i];
+		struct domain_device *device = sas_dev->sas_device;
+
+		if ((sas_dev->dev_type == SAS_PHY_UNUSED) || !device ||
+		    DEV_IS_EXPANDER(device->dev_type))
+			continue;
+
+		rc = hisi_sas_debug_I_T_nexus_reset(device);
+		if (rc != TMF_RESP_FUNC_COMPLETE)
+			dev_info(dev, "clear nexus ha: for device[%d] rc=%d\n",
+				 sas_dev->device_id, rc);
+	}
+
+	hisi_sas_release_tasks(hisi_hba);
+
+	return TMF_RESP_FUNC_COMPLETE;
+}
+
+static int hisi_sas_query_task(struct sas_task *task)
+{
+	struct scsi_lun lun;
+	struct hisi_sas_tmf_task tmf_task;
+	int rc = TMF_RESP_FUNC_FAILED;
+
+	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
+		struct scsi_cmnd *cmnd = task->uldd_task;
+		struct domain_device *device = task->dev;
+		struct hisi_sas_slot *slot = task->lldd_task;
+		u32 tag = slot->idx;
+
+		int_to_scsilun(cmnd->device->lun, &lun);
+		tmf_task.tmf = TMF_QUERY_TASK;
+		tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
+
+		rc = hisi_sas_debug_issue_ssp_tmf(device,
+						  lun.scsi_lun,
+						  &tmf_task);
+		switch (rc) {
+		/* The task is still in Lun, release it then */
+		case TMF_RESP_FUNC_SUCC:
+		/* The task is not in Lun or failed, reset the phy */
+		case TMF_RESP_FUNC_FAILED:
+		case TMF_RESP_FUNC_COMPLETE:
+			break;
+		default:
+			rc = TMF_RESP_FUNC_FAILED;
+			break;
+		}
+	}
+	return rc;
+}
+
+static int
+hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
+				  struct sas_task *task, int abort_flag,
+				  int task_tag)
+{
+	struct domain_device *device = task->dev;
+	struct hisi_sas_device *sas_dev = device->lldd_dev;
+	struct device *dev = hisi_hba->dev;
+	struct hisi_sas_port *port;
+	struct hisi_sas_slot *slot;
+	struct asd_sas_port *sas_port = device->port;
+	struct hisi_sas_cmd_hdr *cmd_hdr_base;
+	struct hisi_sas_dq *dq = sas_dev->dq;
+	int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
+	unsigned long flags, flags_dq = 0;
+	int wr_q_index;
+
+	if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
+		return -EINVAL;
+
+	if (!device->port)
+		return -1;
+
+	port = to_hisi_sas_port(sas_port);
+
+	/* simply get a slot and send abort command */
+	spin_lock_irqsave(&hisi_hba->lock, flags);
+	rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
+	if (rc) {
+		spin_unlock_irqrestore(&hisi_hba->lock, flags);
+		goto err_out;
+	}
+	spin_unlock_irqrestore(&hisi_hba->lock, flags);
+
+	slot = &hisi_hba->slot_info[slot_idx];
+
+	spin_lock_irqsave(&dq->lock, flags_dq);
+	wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
+	if (wr_q_index < 0) {
+		spin_unlock_irqrestore(&dq->lock, flags_dq);
+		rc = -EAGAIN;
+		goto err_out_tag;
+	}
+	list_add_tail(&slot->delivery, &dq->list);
+	spin_unlock_irqrestore(&dq->lock, flags_dq);
+
+	dlvry_queue = dq->id;
+	dlvry_queue_slot = wr_q_index;
+
+	slot->n_elem = n_elem;
+	slot->dlvry_queue = dlvry_queue;
+	slot->dlvry_queue_slot = dlvry_queue_slot;
+	cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
+	slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
+	slot->task = task;
+	slot->port = port;
+	slot->is_internal = true;
+	task->lldd_task = slot;
+
+	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
+	memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
+	memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
+
+	hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
+				      abort_flag, task_tag);
+
+	spin_lock_irqsave(&task->task_state_lock, flags);
+	task->task_state_flags |= SAS_TASK_AT_INITIATOR;
+	spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+	WRITE_ONCE(slot->ready, 1);
+	/* send abort command to the chip */
+	spin_lock_irqsave(&dq->lock, flags);
+	list_add_tail(&slot->entry, &sas_dev->list);
+	hisi_hba->hw->start_delivery(dq);
+	spin_unlock_irqrestore(&dq->lock, flags);
+
+	return 0;
+
+err_out_tag:
+	spin_lock_irqsave(&hisi_hba->lock, flags);
+	hisi_sas_slot_index_free(hisi_hba, slot_idx);
+	spin_unlock_irqrestore(&hisi_hba->lock, flags);
+err_out:
+	dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
+
+	return rc;
+}
+
+/**
+ * hisi_sas_internal_task_abort -- execute an internal
+ * abort command for single IO command or a device
+ * @hisi_hba: host controller struct
+ * @device: domain device
+ * @abort_flag: mode of operation, device or single IO
+ * @tag: tag of IO to be aborted (only relevant to single
+ *       IO mode)
+ */
+static int
+hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
+			     struct domain_device *device,
+			     int abort_flag, int tag)
+{
+	struct sas_task *task;
+	struct hisi_sas_device *sas_dev = device->lldd_dev;
+	struct device *dev = hisi_hba->dev;
+	int res;
+
+	/*
+	 * The interface is not realized means this HW don't support internal
+	 * abort, or don't need to do internal abort. Then here, we return
+	 * TMF_RESP_FUNC_FAILED and let other steps go on, which depends that
+	 * the internal abort has been executed and returned CQ.
+	 */
+	if (!hisi_hba->hw->prep_abort)
+		return TMF_RESP_FUNC_FAILED;
+
+	task = sas_alloc_slow_task(GFP_KERNEL);
+	if (!task)
+		return -ENOMEM;
+
+	task->dev = device;
+	task->task_proto = device->tproto;
+	task->task_done = hisi_sas_task_done;
+	task->slow_task->timer.function = hisi_sas_tmf_timedout;
+	task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT*HZ;
+	add_timer(&task->slow_task->timer);
+
+	res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
+						task, abort_flag, tag);
+	if (res) {
+		del_timer(&task->slow_task->timer);
+		dev_err(dev, "internal task abort: executing internal task failed: %d\n",
+			res);
+		goto exit;
+	}
+	wait_for_completion(&task->slow_task->completion);
+	res = TMF_RESP_FUNC_FAILED;
+
+	/* Internal abort timed out */
+	if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
+		if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
+			struct hisi_sas_slot *slot = task->lldd_task;
+
+			if (slot) {
+				struct hisi_sas_cq *cq =
+					&hisi_hba->cq[slot->dlvry_queue];
+				/*
+				 * flush tasklet to avoid free'ing task
+				 * before using task in IO completion
+				 */
+				tasklet_kill(&cq->tasklet);
+				slot->task = NULL;
+			}
+			dev_err(dev, "internal task abort: timeout and not done.\n");
+			res = -EIO;
+			goto exit;
+		} else
+			dev_err(dev, "internal task abort: timeout.\n");
+	}
+
+	if (task->task_status.resp == SAS_TASK_COMPLETE &&
+		task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
+		res = TMF_RESP_FUNC_COMPLETE;
+		goto exit;
+	}
+
+	if (task->task_status.resp == SAS_TASK_COMPLETE &&
+		task->task_status.stat == TMF_RESP_FUNC_SUCC) {
+		res = TMF_RESP_FUNC_SUCC;
+		goto exit;
+	}
+
+exit:
+	dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
+		"resp: 0x%x sts 0x%x\n",
+		SAS_ADDR(device->sas_addr),
+		task,
+		task->task_status.resp, /* 0 is complete, -1 is undelivered */
+		task->task_status.stat);
+	sas_free_task(task);
+
+	return res;
+}
+
+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)
+{
+}
+
+static int hisi_sas_write_gpio(struct sas_ha_struct *sha, u8 reg_type,
+			u8 reg_index, u8 reg_count, u8 *write_data)
+{
+	struct hisi_hba *hisi_hba = sha->lldd_ha;
+
+	if (!hisi_hba->hw->write_gpio)
+		return -EOPNOTSUPP;
+
+	return hisi_hba->hw->write_gpio(hisi_hba, reg_type,
+				reg_index, reg_count, write_data);
+}
+
+static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
+{
+	struct asd_sas_phy *sas_phy = &phy->sas_phy;
+	struct sas_phy *sphy = sas_phy->phy;
+	struct sas_phy_data *d = sphy->hostdata;
+
+	phy->phy_attached = 0;
+	phy->phy_type = 0;
+	phy->port = NULL;
+
+	if (d->enable)
+		sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
+	else
+		sphy->negotiated_linkrate = SAS_PHY_DISABLED;
+}
+
+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;
+	struct device *dev = hisi_hba->dev;
+
+	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;
+
+		if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
+		    phy->in_reset) {
+			dev_info(dev, "ignore flutter phy%d down\n", phy_no);
+			return;
+		}
+		/* 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);
+
+void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
+{
+	int i;
+
+	for (i = 0; i < hisi_hba->queue_count; i++) {
+		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
+
+		tasklet_kill(&cq->tasklet);
+	}
+}
+EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
+
+struct scsi_transport_template *hisi_sas_stt;
+EXPORT_SYMBOL_GPL(hisi_sas_stt);
+
+struct device_attribute *host_attrs[] = {
+	&dev_attr_phy_event_threshold,
+	NULL,
+};
+EXPORT_SYMBOL_GPL(host_attrs);
+
+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_control_phy	= hisi_sas_control_phy,
+	.lldd_abort_task	= hisi_sas_abort_task,
+	.lldd_abort_task_set	= hisi_sas_abort_task_set,
+	.lldd_clear_aca		= hisi_sas_clear_aca,
+	.lldd_I_T_nexus_reset	= hisi_sas_I_T_nexus_reset,
+	.lldd_lu_reset		= hisi_sas_lu_reset,
+	.lldd_query_task	= hisi_sas_query_task,
+	.lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
+	.lldd_port_formed	= hisi_sas_port_formed,
+	.lldd_port_deformed = hisi_sas_port_deformed,
+	.lldd_write_gpio = hisi_sas_write_gpio,
+};
+
+void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
+{
+	int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
+
+	for (i = 0; i < hisi_hba->queue_count; i++) {
+		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
+		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
+
+		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
+		memset(hisi_hba->cmd_hdr[i], 0, s);
+		dq->wr_point = 0;
+
+		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
+		memset(hisi_hba->complete_hdr[i], 0, s);
+		cq->rd_point = 0;
+	}
+
+	s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
+	memset(hisi_hba->initial_fis, 0, s);
+
+	s = max_command_entries * sizeof(struct hisi_sas_iost);
+	memset(hisi_hba->iost, 0, s);
+
+	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
+	memset(hisi_hba->breakpoint, 0, s);
+
+	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
+	memset(hisi_hba->sata_breakpoint, 0, s);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
+
+int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
+{
+	struct device *dev = hisi_hba->dev;
+	int i, j, s, max_command_entries = hisi_hba->hw->max_command_entries;
+	int max_command_entries_ru, sz_slot_buf_ru;
+	int blk_cnt, slots_per_blk;
+
+	sema_init(&hisi_hba->sem, 1);
+	spin_lock_init(&hisi_hba->lock);
+	for (i = 0; i < hisi_hba->n_phy; i++) {
+		hisi_sas_phy_init(hisi_hba, i);
+		hisi_hba->port[i].port_attached = 0;
+		hisi_hba->port[i].id = -1;
+	}
+
+	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
+		hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
+		hisi_hba->devices[i].device_id = i;
+		hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
+	}
+
+	for (i = 0; i < hisi_hba->queue_count; i++) {
+		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
+		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
+
+		/* Completion queue structure */
+		cq->id = i;
+		cq->hisi_hba = hisi_hba;
+
+		/* Delivery queue structure */
+		spin_lock_init(&dq->lock);
+		INIT_LIST_HEAD(&dq->list);
+		dq->id = i;
+		dq->hisi_hba = hisi_hba;
+
+		/* Delivery queue */
+		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
+		hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
+						&hisi_hba->cmd_hdr_dma[i],
+						GFP_KERNEL);
+		if (!hisi_hba->cmd_hdr[i])
+			goto err_out;
+
+		/* Completion queue */
+		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
+		hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
+						&hisi_hba->complete_hdr_dma[i],
+						GFP_KERNEL);
+		if (!hisi_hba->complete_hdr[i])
+			goto err_out;
+	}
+
+	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
+	hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
+					     GFP_KERNEL);
+	if (!hisi_hba->itct)
+		goto err_out;
+	memset(hisi_hba->itct, 0, s);
+
+	hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
+					   sizeof(struct hisi_sas_slot),
+					   GFP_KERNEL);
+	if (!hisi_hba->slot_info)
+		goto err_out;
+
+	/* roundup to avoid overly large block size */
+	max_command_entries_ru = roundup(max_command_entries, 64);
+	sz_slot_buf_ru = roundup(sizeof(struct hisi_sas_slot_buf_table), 64);
+	s = lcm(max_command_entries_ru, sz_slot_buf_ru);
+	blk_cnt = (max_command_entries_ru * sz_slot_buf_ru) / s;
+	slots_per_blk = s / sz_slot_buf_ru;
+	for (i = 0; i < blk_cnt; i++) {
+		struct hisi_sas_slot_buf_table *buf;
+		dma_addr_t buf_dma;
+		int slot_index = i * slots_per_blk;
+
+		buf = dmam_alloc_coherent(dev, s, &buf_dma, GFP_KERNEL);
+		if (!buf)
+			goto err_out;
+		memset(buf, 0, s);
+
+		for (j = 0; j < slots_per_blk; j++, slot_index++) {
+			struct hisi_sas_slot *slot;
+
+			slot = &hisi_hba->slot_info[slot_index];
+			slot->buf = buf;
+			slot->buf_dma = buf_dma;
+			slot->idx = slot_index;
+
+			buf++;
+			buf_dma += sizeof(*buf);
+		}
+	}
+
+	s = max_command_entries * sizeof(struct hisi_sas_iost);
+	hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
+					     GFP_KERNEL);
+	if (!hisi_hba->iost)
+		goto err_out;
+
+	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
+	hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
+						   &hisi_hba->breakpoint_dma,
+						   GFP_KERNEL);
+	if (!hisi_hba->breakpoint)
+		goto err_out;
+
+	hisi_hba->slot_index_count = max_command_entries;
+	s = hisi_hba->slot_index_count / BITS_PER_BYTE;
+	hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
+	if (!hisi_hba->slot_index_tags)
+		goto err_out;
+
+	s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
+	hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
+						    &hisi_hba->initial_fis_dma,
+						    GFP_KERNEL);
+	if (!hisi_hba->initial_fis)
+		goto err_out;
+
+	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
+	hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
+					&hisi_hba->sata_breakpoint_dma,
+					GFP_KERNEL);
+	if (!hisi_hba->sata_breakpoint)
+		goto err_out;
+	hisi_sas_init_mem(hisi_hba);
+
+	hisi_sas_slot_index_init(hisi_hba);
+
+	hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
+	if (!hisi_hba->wq) {
+		dev_err(dev, "sas_alloc: failed to create workqueue\n");
+		goto err_out;
+	}
+
+	return 0;
+err_out:
+	return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(hisi_sas_alloc);
+
+void hisi_sas_free(struct hisi_hba *hisi_hba)
+{
+	if (hisi_hba->wq)
+		destroy_workqueue(hisi_hba->wq);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_free);
+
+void hisi_sas_rst_work_handler(struct work_struct *work)
+{
+	struct hisi_hba *hisi_hba =
+		container_of(work, struct hisi_hba, rst_work);
+
+	hisi_sas_controller_reset(hisi_hba);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
+
+void hisi_sas_sync_rst_work_handler(struct work_struct *work)
+{
+	struct hisi_sas_rst *rst =
+		container_of(work, struct hisi_sas_rst, work);
+
+	if (!hisi_sas_controller_reset(rst->hisi_hba))
+		rst->done = true;
+	complete(rst->completion);
+}
+EXPORT_SYMBOL_GPL(hisi_sas_sync_rst_work_handler);
+
+int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
+{
+	struct device *dev = hisi_hba->dev;
+	struct platform_device *pdev = hisi_hba->platform_dev;
+	struct device_node *np = pdev ? pdev->dev.of_node : NULL;
+	struct clk *refclk;
+
+	if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
+					  SAS_ADDR_SIZE)) {
+		dev_err(dev, "could not get property sas-addr\n");
+		return -ENOENT;
+	}
+
+	if (np) {
+		/*
+		 * These properties are only required for platform device-based
+		 * controller with DT firmware.
+		 */
+		hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
+					"hisilicon,sas-syscon");
+		if (IS_ERR(hisi_hba->ctrl)) {
+			dev_err(dev, "could not get syscon\n");
+			return -ENOENT;
+		}
+
+		if (device_property_read_u32(dev, "ctrl-reset-reg",
+					     &hisi_hba->ctrl_reset_reg)) {
+			dev_err(dev,
+				"could not get property ctrl-reset-reg\n");
+			return -ENOENT;
+		}
+
+		if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
+					     &hisi_hba->ctrl_reset_sts_reg)) {
+			dev_err(dev,
+				"could not get property ctrl-reset-sts-reg\n");
+			return -ENOENT;
+		}
+
+		if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
+					     &hisi_hba->ctrl_clock_ena_reg)) {
+			dev_err(dev,
+				"could not get property ctrl-clock-ena-reg\n");
+			return -ENOENT;
+		}
+	}
+
+	refclk = devm_clk_get(dev, NULL);
+	if (IS_ERR(refclk))
+		dev_dbg(dev, "no ref clk property\n");
+	else
+		hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
+
+	if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
+		dev_err(dev, "could not get property phy-count\n");
+		return -ENOENT;
+	}
+
+	if (device_property_read_u32(dev, "queue-count",
+				     &hisi_hba->queue_count)) {
+		dev_err(dev, "could not get property queue-count\n");
+		return -ENOENT;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
+
+static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
+					      const struct hisi_sas_hw *hw)
+{
+	struct resource *res;
+	struct Scsi_Host *shost;
+	struct hisi_hba *hisi_hba;
+	struct device *dev = &pdev->dev;
+
+	shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
+	if (!shost) {
+		dev_err(dev, "scsi host alloc failed\n");
+		return NULL;
+	}
+	hisi_hba = shost_priv(shost);
+
+	INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
+	hisi_hba->hw = hw;
+	hisi_hba->dev = dev;
+	hisi_hba->platform_dev = pdev;
+	hisi_hba->shost = shost;
+	SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
+
+	timer_setup(&hisi_hba->timer, NULL, 0);
+
+	if (hisi_sas_get_fw_info(hisi_hba) < 0)
+		goto err_out;
+
+	if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
+	    dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
+		dev_err(dev, "No usable DMA addressing method\n");
+		goto err_out;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	hisi_hba->regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(hisi_hba->regs))
+		goto err_out;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		hisi_hba->sgpio_regs = devm_ioremap_resource(dev, res);
+		if (IS_ERR(hisi_hba->sgpio_regs))
+			goto err_out;
+	}
+
+	if (hisi_sas_alloc(hisi_hba, shost)) {
+		hisi_sas_free(hisi_hba);
+		goto err_out;
+	}
+
+	return shost;
+err_out:
+	scsi_host_put(shost);
+	dev_err(dev, "shost alloc failed\n");
+	return NULL;
+}
+
+int hisi_sas_probe(struct platform_device *pdev,
+		   const struct hisi_sas_hw *hw)
+{
+	struct Scsi_Host *shost;
+	struct hisi_hba *hisi_hba;
+	struct device *dev = &pdev->dev;
+	struct asd_sas_phy **arr_phy;
+	struct asd_sas_port **arr_port;
+	struct sas_ha_struct *sha;
+	int rc, phy_nr, port_nr, i;
+
+	shost = hisi_sas_shost_alloc(pdev, hw);
+	if (!shost)
+		return -ENOMEM;
+
+	sha = SHOST_TO_SAS_HA(shost);
+	hisi_hba = shost_priv(shost);
+	platform_set_drvdata(pdev, sha);
+
+	phy_nr = port_nr = hisi_hba->n_phy;
+
+	arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
+	arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
+	if (!arr_phy || !arr_port) {
+		rc = -ENOMEM;
+		goto err_out_ha;
+	}
+
+	sha->sas_phy = arr_phy;
+	sha->sas_port = arr_port;
+	sha->lldd_ha = hisi_hba;
+
+	shost->transportt = hisi_sas_stt;
+	shost->max_id = HISI_SAS_MAX_DEVICES;
+	shost->max_lun = ~0;
+	shost->max_channel = 1;
+	shost->max_cmd_len = 16;
+	shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
+	shost->can_queue = hisi_hba->hw->max_command_entries;
+	shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
+
+	sha->sas_ha_name = DRV_NAME;
+	sha->dev = hisi_hba->dev;
+	sha->lldd_module = THIS_MODULE;
+	sha->sas_addr = &hisi_hba->sas_addr[0];
+	sha->num_phys = hisi_hba->n_phy;
+	sha->core.shost = hisi_hba->shost;
+
+	for (i = 0; i < hisi_hba->n_phy; i++) {
+		sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
+		sha->sas_port[i] = &hisi_hba->port[i].sas_port;
+	}
+
+	rc = scsi_add_host(shost, &pdev->dev);
+	if (rc)
+		goto err_out_ha;
+
+	rc = sas_register_ha(sha);
+	if (rc)
+		goto err_out_register_ha;
+
+	rc = hisi_hba->hw->hw_init(hisi_hba);
+	if (rc)
+		goto err_out_register_ha;
+
+	scsi_scan_host(shost);
+
+	return 0;
+
+err_out_register_ha:
+	scsi_remove_host(shost);
+err_out_ha:
+	hisi_sas_free(hisi_hba);
+	scsi_host_put(shost);
+	return rc;
+}
+EXPORT_SYMBOL_GPL(hisi_sas_probe);
+
+int hisi_sas_remove(struct platform_device *pdev)
+{
+	struct sas_ha_struct *sha = platform_get_drvdata(pdev);
+	struct hisi_hba *hisi_hba = sha->lldd_ha;
+	struct Scsi_Host *shost = sha->core.shost;
+
+	if (timer_pending(&hisi_hba->timer))
+		del_timer(&hisi_hba->timer);
+
+	sas_unregister_ha(sha);
+	sas_remove_host(sha->core.shost);
+
+	hisi_sas_free(hisi_hba);
+	scsi_host_put(shost);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(hisi_sas_remove);
+
+static __init int hisi_sas_init(void)
+{
+	hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
+	if (!hisi_sas_stt)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static __exit void hisi_sas_exit(void)
+{
+	sas_release_transport(hisi_sas_stt);
+}
+
+module_init(hisi_sas_init);
+module_exit(hisi_sas_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
+MODULE_DESCRIPTION("HISILICON SAS controller driver");
+MODULE_ALIAS("platform:" DRV_NAME);