hisi_sas_main.c 53.9 KB
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/*
 * 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"
#define DRV_NAME "hisi_sas"

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#define DEV_IS_GONE(dev) \
	((!dev) || (dev->dev_type == SAS_PHY_UNUSED))

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static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
				u8 *lun, struct hisi_sas_tmf_task *tmf);
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static int
hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
			     struct domain_device *device,
			     int abort_flag, int tag);
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static int hisi_sas_softreset_ata_disk(struct domain_device *device);
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u8 hisi_sas_get_ata_protocol(u8 cmd, int direction)
{
	switch (cmd) {
	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:
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	case ATA_CMD_ZAC_MGMT_IN:
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	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:
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	case ATA_CMD_ZAC_MGMT_OUT:
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	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);

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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;
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	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;
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	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);

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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);

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static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
{
	return device->port->ha->lldd_ha;
}

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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);

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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);

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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);
}

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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_first_zero_bit(bitmap, hisi_hba->slot_index_count);
	if (index >= hisi_hba->slot_index_count)
		return -SAS_QUEUE_FULL;
	hisi_sas_slot_index_set(hisi_hba, index);
	*slot_idx = index;
	return 0;
}

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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);
}
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void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
			     struct hisi_sas_slot *slot)
{

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	if (task) {
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		struct device *dev = hisi_hba->dev;
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		struct domain_device *device = task->dev;
		struct hisi_sas_device *sas_dev = device->lldd_dev;
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		if (!sas_protocol_ata(task->task_proto))
			if (slot->n_elem)
				dma_unmap_sg(dev, task->scatter, slot->n_elem,
					     task->data_dir);

		task->lldd_task = NULL;

		if (sas_dev)
			atomic64_dec(&sas_dev->running_req);
	}
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	if (slot->buf)
		dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
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	list_del_init(&slot->entry);
	slot->task = NULL;
	slot->port = NULL;
	hisi_sas_slot_index_free(hisi_hba, slot->idx);
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	/* slot memory is fully zeroed when it is reused */
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}
EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);

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static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
				  struct hisi_sas_slot *slot)
{
	return hisi_hba->hw->prep_smp(hisi_hba, slot);
}

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static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
				  struct hisi_sas_slot *slot, int is_tmf,
				  struct hisi_sas_tmf_task *tmf)
{
	return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
}

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static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
				  struct hisi_sas_slot *slot)
{
	return hisi_hba->hw->prep_stp(hisi_hba, slot);
}

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static int 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)
{
	return hisi_hba->hw->prep_abort(hisi_hba, slot,
			device_id, abort_flag, tag_to_abort);
}

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/*
 * This function will issue an abort TMF regardless of whether the
 * task is in the sdev or not. Then it will do the task complete
 * cleanup and callbacks.
 */
static void hisi_sas_slot_abort(struct work_struct *work)
{
	struct hisi_sas_slot *abort_slot =
		container_of(work, struct hisi_sas_slot, abort_slot);
	struct sas_task *task = abort_slot->task;
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
	struct scsi_cmnd *cmnd = task->uldd_task;
	struct hisi_sas_tmf_task tmf_task;
	struct scsi_lun lun;
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	struct device *dev = hisi_hba->dev;
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	int tag = abort_slot->idx;
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	unsigned long flags;
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	if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
		dev_err(dev, "cannot abort slot for non-ssp task\n");
		goto out;
	}

	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);

	hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
out:
	/* Do cleanup for this task */
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	spin_lock_irqsave(&hisi_hba->lock, flags);
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	hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
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	spin_unlock_irqrestore(&hisi_hba->lock, flags);
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	if (task->task_done)
		task->task_done(task);
}

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static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
		*dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
		int *pass)
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{
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	struct hisi_hba *hisi_hba = dq->hisi_hba;
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	struct domain_device *device = task->dev;
	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;
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	struct asd_sas_port *sas_port = device->port;
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	struct device *dev = hisi_hba->dev;
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	int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
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	unsigned long flags;
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	if (!sas_port) {
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		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);
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		return SAS_PHY_DOWN;
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	}

	if (DEV_IS_GONE(sas_dev)) {
		if (sas_dev)
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			dev_info(dev, "task prep: device %d not ready\n",
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				 sas_dev->device_id);
		else
			dev_info(dev, "task prep: device %016llx not ready\n",
				 SAS_ADDR(device->sas_addr));

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		return SAS_PHY_DOWN;
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	}
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	port = to_hisi_sas_port(sas_port);
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	if (port && !port->port_attached) {
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		dev_info(dev, "task prep: %s port%d not attach device\n",
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			 (dev_is_sata(device)) ?
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			 "SATA/STP" : "SAS",
			 device->port->id);

		return SAS_PHY_DOWN;
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	}

	if (!sas_protocol_ata(task->task_proto)) {
		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
		n_elem = task->num_scatter;

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	spin_lock_irqsave(&hisi_hba->lock, flags);
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	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);
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	if (rc) {
		spin_unlock_irqrestore(&hisi_hba->lock, flags);
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		goto err_out;
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	}
	spin_unlock_irqrestore(&hisi_hba->lock, flags);

	rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
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	if (rc)
		goto err_out_tag;

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	dlvry_queue = dq->id;
	dlvry_queue_slot = dq->wr_point;
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	slot = &hisi_hba->slot_info[slot_idx];
	memset(slot, 0, sizeof(struct hisi_sas_slot));

	slot->idx = slot_idx;
	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;
	task->lldd_task = slot;
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	INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
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	slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
				   GFP_ATOMIC, &slot->buf_dma);
	if (!slot->buf) {
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		rc = -ENOMEM;
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		goto err_out_slot_buf;
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	}
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	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
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	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);
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	switch (task->task_proto) {
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	case SAS_PROTOCOL_SMP:
		rc = hisi_sas_task_prep_smp(hisi_hba, slot);
		break;
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	case SAS_PROTOCOL_SSP:
		rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
		break;
	case SAS_PROTOCOL_SATA:
	case SAS_PROTOCOL_STP:
	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
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		rc = hisi_sas_task_prep_ata(hisi_hba, slot);
		break;
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	default:
		dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
			task->task_proto);
		rc = -EINVAL;
		break;
	}

	if (rc) {
		dev_err(dev, "task prep: rc = 0x%x\n", rc);
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		goto err_out_buf;
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	}

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	list_add_tail(&slot->entry, &sas_dev->list);
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	spin_lock_irqsave(&task->task_state_lock, flags);
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	task->task_state_flags |= SAS_TASK_AT_INITIATOR;
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	spin_unlock_irqrestore(&task->task_state_lock, flags);
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	dq->slot_prep = slot;
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	atomic64_inc(&sas_dev->running_req);
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	++(*pass);

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	return 0;
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err_out_buf:
	dma_pool_free(hisi_hba->buffer_pool, slot->buf,
		slot->buf_dma);
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err_out_slot_buf:
	/* Nothing to be done */
err_out_tag:
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	spin_lock_irqsave(&hisi_hba->lock, flags);
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	hisi_sas_slot_index_free(hisi_hba, slot_idx);
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	spin_unlock_irqrestore(&hisi_hba->lock, flags);
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err_out:
	dev_err(dev, "task prep: failed[%d]!\n", rc);
	if (!sas_protocol_ata(task->task_proto))
		if (n_elem)
			dma_unmap_sg(dev, task->scatter, n_elem,
				     task->data_dir);
prep_out:
	return rc;
}

static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
			      int 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);
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	struct device *dev = hisi_hba->dev;
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	struct domain_device *device = task->dev;
	struct hisi_sas_device *sas_dev = device->lldd_dev;
	struct hisi_sas_dq *dq = sas_dev->dq;
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	if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
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		return -EINVAL;

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	/* protect task_prep and start_delivery sequence */
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	spin_lock_irqsave(&dq->lock, flags);
	rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
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	if (rc)
		dev_err(dev, "task exec: failed[%d]!\n", rc);

	if (likely(pass))
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		hisi_hba->hw->start_delivery(dq);
	spin_unlock_irqrestore(&dq->lock, flags);
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	return rc;
}
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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;
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		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;
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	}

	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);
}

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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;
	int i;

	spin_lock(&hisi_hba->lock);
	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
		if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
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			int queue = i % hisi_hba->queue_count;
			struct hisi_sas_dq *dq = &hisi_hba->dq[queue];

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			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;
522
			sas_dev->dq = dq;
523
			INIT_LIST_HEAD(&hisi_hba->devices[i].list);
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			break;
		}
	}
	spin_unlock(&hisi_hba->lock);

	return sas_dev;
}

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;
537
	struct device *dev = hisi_hba->dev;
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539 540 541 542
	if (hisi_hba->hw->alloc_dev)
		sas_dev = hisi_hba->hw->alloc_dev(device);
	else
		sas_dev = hisi_sas_alloc_dev(device);
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	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)) {
				sas_dev->attached_phy = phy_no;
				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));
			return -EINVAL;
		}
	}

	return 0;
}

578 579 580 581 582 583 584 585 586 587 588 589 590
static 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;
}

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static void hisi_sas_scan_start(struct Scsi_Host *shost)
{
	struct hisi_hba *hisi_hba = shost_priv(shost);

595
	hisi_hba->hw->phys_init(hisi_hba);
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}

static 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;

603 604
	/* Wait for PHY up interrupt to occur */
	if (time < HZ)
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		return 0;

	sas_drain_work(sha);
	return 1;
}

611 612 613 614 615 616 617 618 619 620 621
static void hisi_sas_phyup_work(struct work_struct *work)
{
	struct hisi_sas_phy *phy =
		container_of(work, struct hisi_sas_phy, phyup_ws);
	struct hisi_hba *hisi_hba = phy->hisi_hba;
	struct asd_sas_phy *sas_phy = &phy->sas_phy;
	int phy_no = sas_phy->id;

	hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
	hisi_sas_bytes_dmaed(hisi_hba, phy_no);
}
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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;

	phy->hisi_hba = hisi_hba;
	phy->port = NULL;
	init_timer(&phy->timer);
	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;
644 645

	INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
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}

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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;
654
	struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
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	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);
}

668
static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
669
				     struct hisi_sas_slot *slot)
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{
671 672 673
	if (task) {
		unsigned long flags;
		struct task_status_struct *ts;
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675
		ts = &task->task_status;
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677 678 679 680 681 682 683 684
		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);
		task->task_state_flags |= SAS_TASK_STATE_DONE;
		spin_unlock_irqrestore(&task->task_state_lock, flags);
	}
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686
	hisi_sas_slot_task_free(hisi_hba, task, slot);
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}

689
/* hisi_hba.lock should be locked */
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static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
			struct domain_device *device)
{
693 694
	struct hisi_sas_slot *slot, *slot2;
	struct hisi_sas_device *sas_dev = device->lldd_dev;
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696 697
	list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
		hisi_sas_do_release_task(hisi_hba, slot->task, slot);
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}

700 701
static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
{
702 703
	struct hisi_sas_device *sas_dev;
	struct domain_device *device;
704 705
	int i;

706 707 708
	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
		sas_dev = &hisi_hba->devices[i];
		device = sas_dev->sas_device;
709

710 711
		if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
		    !device)
712
			continue;
713 714

		hisi_sas_release_task(hisi_hba, device);
715 716 717
	}
}

718 719 720 721 722 723 724
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);
}

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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);
729
	struct device *dev = hisi_hba->dev;
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731
	dev_info(dev, "found dev[%d:%x] is gone\n",
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		 sas_dev->device_id, sas_dev->dev_type);

734 735 736
	hisi_sas_internal_task_abort(hisi_hba, device,
				     HISI_SAS_INT_ABT_DEV, 0);

737 738
	hisi_sas_dereg_device(hisi_hba, device);

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	hisi_hba->hw->free_device(hisi_hba, sas_dev);
	device->lldd_dev = NULL;
	memset(sas_dev, 0, sizeof(*sas_dev));
	sas_dev->dev_type = SAS_PHY_UNUSED;
}
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static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
{
	return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
}

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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:
763 764
		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
		msleep(100);
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		hisi_hba->hw->phy_enable(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:
773 774
		hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
		break;
775 776 777 778 779 780
	case PHY_FUNC_GET_EVENTS:
		if (hisi_hba->hw->get_events) {
			hisi_hba->hw->get_events(hisi_hba, phy_no);
			break;
		}
		/* fallthru */
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	case PHY_FUNC_RELEASE_SPINUP_HOLD:
	default:
		return -EOPNOTSUPP;
	}
	return 0;
}
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static void hisi_sas_task_done(struct sas_task *task)
{
	if (!del_timer(&task->slow_task->timer))
		return;
	complete(&task->slow_task->completion);
}

static void hisi_sas_tmf_timedout(unsigned long data)
{
	struct sas_task *task = (struct sas_task *)data;
798 799 800 801 802 803
	unsigned long flags;

	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;
	spin_unlock_irqrestore(&task->task_state_lock, flags);
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	complete(&task->slow_task->completion);
}

#define TASK_TIMEOUT 20
#define TASK_RETRY 3
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;
816
	struct device *dev = hisi_hba->dev;
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	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;

828 829 830 831 832 833
		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);
		}
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		task->task_done = hisi_sas_task_done;

		task->slow_task->timer.data = (unsigned long) task;
		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)) {
855 856
				struct hisi_sas_slot *slot = task->lldd_task;

857
				dev_err(dev, "abort tmf: TMF task timeout\n");
858 859 860
				if (slot)
					slot->task = NULL;

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				goto ex_err;
			}
		}

		if (task->task_status.resp == SAS_TASK_COMPLETE &&
866
		     task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
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			res = TMF_RESP_FUNC_COMPLETE;
			break;
		}

871 872 873 874 875 876
		if (task->task_status.resp == SAS_TASK_COMPLETE &&
			task->task_status.stat == TMF_RESP_FUNC_SUCC) {
			res = TMF_RESP_FUNC_SUCC;
			break;
		}

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		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:
906 907
	if (retry == TASK_RETRY)
		dev_warn(dev, "abort tmf: executing internal task failed!\n");
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	sas_free_task(task);
	return res;
}

912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932
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);
933
	struct device *dev = hisi_hba->dev;
934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968
	int s = sizeof(struct host_to_dev_fis);
	unsigned long flags;

	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) {
		spin_lock_irqsave(&hisi_hba->lock, flags);
		hisi_sas_release_task(hisi_hba, device);
		spin_unlock_irqrestore(&hisi_hba->lock, flags);
	}

	return rc;
}

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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);
}

983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046
static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba,
		struct asd_sas_port *sas_port, enum sas_linkrate linkrate)
{
	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 || (device->port != sas_port))
			continue;

		hisi_hba->hw->free_device(hisi_hba, sas_dev);

		/* Update linkrate of directly attached device. */
		if (!device->parent)
			device->linkrate = linkrate;

		hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
	}
}

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;
		struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
		bool do_port_check = !!(_sas_port != sas_port);

		if (!sas_phy->phy->enabled)
			continue;

		/* Report PHY state change to libsas */
		if (state & (1 << phy_no)) {
			if (do_port_check && sas_port) {
				struct domain_device *dev = sas_port->port_dev;

				_sas_port = sas_port;
				port->id = phy->port_id;
				hisi_sas_refresh_port_id(hisi_hba,
						sas_port, sas_phy->linkrate);

				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);

	}

	drain_workqueue(hisi_hba->shost->work_q);
}

1047 1048
static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
{
1049 1050 1051 1052 1053
	struct sas_ha_struct *sas_ha = &hisi_hba->sha;
	struct device *dev = hisi_hba->dev;
	struct Scsi_Host *shost = hisi_hba->shost;
	u32 old_state, state;
	unsigned long flags;
1054 1055 1056 1057 1058
	int rc;

	if (!hisi_hba->hw->soft_reset)
		return -1;

1059 1060
	if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
		return -1;
1061

1062 1063
	dev_dbg(dev, "controller resetting...\n");
	old_state = hisi_hba->hw->get_phys_state(hisi_hba);
1064

1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088
	scsi_block_requests(shost);
	set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
	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);
		goto out;
	}
	spin_lock_irqsave(&hisi_hba->lock, flags);
	hisi_sas_release_tasks(hisi_hba);
	spin_unlock_irqrestore(&hisi_hba->lock, flags);

	sas_ha->notify_ha_event(sas_ha, HAE_RESET);
	clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);

	/* Init and wait for PHYs to come up and all libsas event finished. */
	hisi_hba->hw->phys_init(hisi_hba);
	msleep(1000);
	drain_workqueue(hisi_hba->wq);
	drain_workqueue(shost->work_q);

	state = hisi_hba->hw->get_phys_state(hisi_hba);
	hisi_sas_rescan_topology(hisi_hba, old_state, state);
	dev_dbg(dev, "controller reset complete\n");
1089 1090

out:
1091
	scsi_unblock_requests(shost);
1092
	clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1093

1094 1095 1096
	return rc;
}

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John Garry 已提交
1097 1098 1099 1100 1101 1102 1103
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 = dev_to_hisi_hba(task->dev);
1104
	struct device *dev = hisi_hba->dev;
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John Garry 已提交
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
	int rc = TMF_RESP_FUNC_FAILED;
	unsigned long flags;

	if (!sas_dev) {
		dev_warn(dev, "Device has been removed\n");
		return TMF_RESP_FUNC_FAILED;
	}

	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
		rc = TMF_RESP_FUNC_COMPLETE;
		goto out;
	}

	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;
1123
		int rc2;
J
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1124 1125 1126 1127 1128 1129 1130 1131

		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);

1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
		rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
						   HISI_SAS_INT_ABT_CMD, tag);
		/*
		 * 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) {
J
John Garry 已提交
1142 1143
			if (task->lldd_task) {
				spin_lock_irqsave(&hisi_hba->lock, flags);
1144
				hisi_sas_do_release_task(hisi_hba, task, slot);
J
John Garry 已提交
1145 1146 1147 1148 1149 1150
				spin_unlock_irqrestore(&hisi_hba->lock, flags);
			}
		}
	} else if (task->task_proto & SAS_PROTOCOL_SATA ||
		task->task_proto & SAS_PROTOCOL_STP) {
		if (task->dev->dev_type == SAS_SATA_DEV) {
1151 1152
			hisi_sas_internal_task_abort(hisi_hba, device,
						     HISI_SAS_INT_ABT_DEV, 0);
1153
			hisi_sas_dereg_device(hisi_hba, device);
1154
			rc = hisi_sas_softreset_ata_disk(device);
J
John Garry 已提交
1155
		}
1156
	} else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1157 1158 1159
		/* SMP */
		struct hisi_sas_slot *slot = task->lldd_task;
		u32 tag = slot->idx;
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John Garry 已提交
1160

1161 1162 1163 1164 1165 1166 1167
		rc = hisi_sas_internal_task_abort(hisi_hba, device,
			     HISI_SAS_INT_ABT_CMD, tag);
		if (rc == TMF_RESP_FUNC_FAILED) {
			spin_lock_irqsave(&hisi_hba->lock, flags);
			hisi_sas_do_release_task(hisi_hba, task, slot);
			spin_unlock_irqrestore(&hisi_hba->lock, flags);
		}
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1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219
	}

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_sas_tmf_task tmf_task;
	int rc = TMF_RESP_FUNC_FAILED;

	tmf_task.tmf = TMF_ABORT_TASK_SET;
	rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);

	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 *phy = sas_get_local_phy(device);
	int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
			(device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
	rc = sas_phy_reset(phy, reset_type);
	sas_put_local_phy(phy);
	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);
	unsigned long flags;
	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;

1220 1221 1222 1223
	hisi_sas_internal_task_abort(hisi_hba, device,
					HISI_SAS_INT_ABT_DEV, 0);
	hisi_sas_dereg_device(hisi_hba, device);

J
John Garry 已提交
1224 1225
	rc = hisi_sas_debug_I_T_nexus_reset(device);

1226 1227 1228 1229 1230 1231
	if (rc == TMF_RESP_FUNC_COMPLETE) {
		spin_lock_irqsave(&hisi_hba->lock, flags);
		hisi_sas_release_task(hisi_hba, device);
		spin_unlock_irqrestore(&hisi_hba->lock, flags);
	}
	return rc;
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John Garry 已提交
1232 1233 1234 1235 1236 1237
}

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);
1238
	struct device *dev = hisi_hba->dev;
J
John Garry 已提交
1239 1240 1241 1242
	unsigned long flags;
	int rc = TMF_RESP_FUNC_FAILED;

	sas_dev->dev_status = HISI_SAS_DEV_EH;
1243 1244 1245 1246 1247 1248 1249 1250
	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 == TMF_RESP_FUNC_FAILED)
			goto out;
1251
		hisi_sas_dereg_device(hisi_hba, device);
J
John Garry 已提交
1252

1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273
		phy = sas_get_local_phy(device);

		rc = sas_phy_reset(phy, 1);

		if (rc == 0) {
			spin_lock_irqsave(&hisi_hba->lock, flags);
			hisi_sas_release_task(hisi_hba, device);
			spin_unlock_irqrestore(&hisi_hba->lock, flags);
		}
		sas_put_local_phy(phy);
	} else {
		struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };

		rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
		if (rc == TMF_RESP_FUNC_COMPLETE) {
			spin_lock_irqsave(&hisi_hba->lock, flags);
			hisi_sas_release_task(hisi_hba, device);
			spin_unlock_irqrestore(&hisi_hba->lock, flags);
		}
	}
out:
1274
	if (rc != TMF_RESP_FUNC_COMPLETE)
1275
		dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1276
			     sas_dev->device_id, rc);
J
John Garry 已提交
1277 1278 1279
	return rc;
}

1280 1281 1282 1283 1284 1285 1286
static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
{
	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;

	return hisi_sas_controller_reset(hisi_hba);
}

J
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1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312
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;
1313 1314 1315
		default:
			rc = TMF_RESP_FUNC_FAILED;
			break;
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John Garry 已提交
1316 1317 1318 1319 1320
		}
	}
	return rc;
}

1321
static int
1322
hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1323 1324 1325 1326 1327
				  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;
1328
	struct device *dev = hisi_hba->dev;
1329 1330
	struct hisi_sas_port *port;
	struct hisi_sas_slot *slot;
1331
	struct asd_sas_port *sas_port = device->port;
1332
	struct hisi_sas_cmd_hdr *cmd_hdr_base;
1333
	struct hisi_sas_dq *dq = sas_dev->dq;
1334
	int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1335
	unsigned long flags, flags_dq;
1336

1337
	if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1338 1339
		return -EINVAL;

1340 1341 1342
	if (!device->port)
		return -1;

1343
	port = to_hisi_sas_port(sas_port);
1344 1345

	/* simply get a slot and send abort command */
1346
	spin_lock_irqsave(&hisi_hba->lock, flags);
1347
	rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
1348 1349
	if (rc) {
		spin_unlock_irqrestore(&hisi_hba->lock, flags);
1350
		goto err_out;
1351 1352 1353 1354 1355
	}
	spin_unlock_irqrestore(&hisi_hba->lock, flags);

	spin_lock_irqsave(&dq->lock, flags_dq);
	rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
1356 1357 1358
	if (rc)
		goto err_out_tag;

1359 1360 1361
	dlvry_queue = dq->id;
	dlvry_queue_slot = dq->wr_point;

1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374
	slot = &hisi_hba->slot_info[slot_idx];
	memset(slot, 0, sizeof(struct hisi_sas_slot));

	slot->idx = slot_idx;
	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;
	task->lldd_task = slot;

1375 1376 1377 1378 1379 1380 1381
	slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
			GFP_ATOMIC, &slot->buf_dma);
	if (!slot->buf) {
		rc = -ENOMEM;
		goto err_out_tag;
	}

1382
	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1383 1384
	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);
1385 1386 1387 1388

	rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
				      abort_flag, task_tag);
	if (rc)
1389
		goto err_out_buf;
1390

1391 1392

	list_add_tail(&slot->entry, &sas_dev->list);
1393
	spin_lock_irqsave(&task->task_state_lock, flags);
1394
	task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1395
	spin_unlock_irqrestore(&task->task_state_lock, flags);
1396

1397
	dq->slot_prep = slot;
1398

1399 1400
	atomic64_inc(&sas_dev->running_req);

1401 1402 1403
	/* send abort command to the chip */
	hisi_hba->hw->start_delivery(dq);
	spin_unlock_irqrestore(&dq->lock, flags_dq);
1404 1405 1406

	return 0;

1407 1408 1409
err_out_buf:
	dma_pool_free(hisi_hba->buffer_pool, slot->buf,
		slot->buf_dma);
1410
err_out_tag:
1411
	spin_lock_irqsave(&hisi_hba->lock, flags);
1412
	hisi_sas_slot_index_free(hisi_hba, slot_idx);
1413 1414
	spin_unlock_irqrestore(&hisi_hba->lock, flags);
	spin_unlock_irqrestore(&dq->lock, flags_dq);
1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436
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;
1437
	struct device *dev = hisi_hba->dev;
1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451
	int res;

	if (!hisi_hba->hw->prep_abort)
		return -EOPNOTSUPP;

	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.data = (unsigned long)task;
	task->slow_task->timer.function = hisi_sas_tmf_timedout;
1452
	task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
	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;

1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476
	/* 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)
				slot->task = NULL;
			dev_err(dev, "internal task abort: timeout.\n");
		}
	}

1477 1478 1479 1480 1481 1482
	if (task->task_status.resp == SAS_TASK_COMPLETE &&
		task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
		res = TMF_RESP_FUNC_COMPLETE;
		goto exit;
	}

1483 1484 1485 1486 1487 1488
	if (task->task_status.resp == SAS_TASK_COMPLETE &&
		task->task_status.stat == TMF_RESP_FUNC_SUCC) {
		res = TMF_RESP_FUNC_SUCC;
		goto exit;
	}

1489
exit:
1490
	dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1491 1492 1493 1494 1495 1496 1497 1498 1499 1500
		"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;
}

J
John Garry 已提交
1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544
static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
{
	hisi_sas_port_notify_formed(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);

1545

1546 1547
struct scsi_transport_template *hisi_sas_stt;
EXPORT_SYMBOL_GPL(hisi_sas_stt);
1548

1549
static struct scsi_host_template _hisi_sas_sht = {
J
John Garry 已提交
1550 1551 1552 1553
	.module			= THIS_MODULE,
	.name			= DRV_NAME,
	.queuecommand		= sas_queuecommand,
	.target_alloc		= sas_target_alloc,
1554
	.slave_configure	= hisi_sas_slave_configure,
J
John Garry 已提交
1555 1556
	.scan_finished		= hisi_sas_scan_finished,
	.scan_start		= hisi_sas_scan_start,
J
John Garry 已提交
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
	.change_queue_depth	= sas_change_queue_depth,
	.bios_param		= sas_bios_param,
	.can_queue		= 1,
	.this_id		= -1,
	.sg_tablesize		= SG_ALL,
	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,
	.use_clustering		= ENABLE_CLUSTERING,
	.eh_device_reset_handler = sas_eh_device_reset_handler,
	.eh_bus_reset_handler	= sas_eh_bus_reset_handler,
	.target_destroy		= sas_target_destroy,
	.ioctl			= sas_ioctl,
};
1569 1570
struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
EXPORT_SYMBOL_GPL(hisi_sas_sht);
J
John Garry 已提交
1571

1572
static struct sas_domain_function_template hisi_sas_transport_ops = {
J
John Garry 已提交
1573 1574
	.lldd_dev_found		= hisi_sas_dev_found,
	.lldd_dev_gone		= hisi_sas_dev_gone,
J
John Garry 已提交
1575
	.lldd_execute_task	= hisi_sas_queue_command,
J
John Garry 已提交
1576
	.lldd_control_phy	= hisi_sas_control_phy,
J
John Garry 已提交
1577 1578 1579 1580 1581 1582
	.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,
1583
	.lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
J
John Garry 已提交
1584
	.lldd_port_formed	= hisi_sas_port_formed,
1585 1586
};

1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617
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 = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
	memset(hisi_hba->sata_breakpoint, 0, s);
}
EXPORT_SYMBOL_GPL(hisi_sas_init_mem);

1618
int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
1619
{
1620
	struct device *dev = hisi_hba->dev;
1621
	int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
1622

J
John Garry 已提交
1623
	spin_lock_init(&hisi_hba->lock);
J
John Garry 已提交
1624 1625 1626 1627 1628 1629
	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;
	}

J
John Garry 已提交
1630 1631 1632 1633 1634 1635
	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;
	}

1636
	for (i = 0; i < hisi_hba->queue_count; i++) {
1637
		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
1638
		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
1639 1640 1641 1642 1643

		/* Completion queue structure */
		cq->id = i;
		cq->hisi_hba = hisi_hba;

1644 1645 1646 1647
		/* Delivery queue structure */
		dq->id = i;
		dq->hisi_hba = hisi_hba;

1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662
		/* Delivery queue */
		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
		hisi_hba->cmd_hdr[i] = dma_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] = dma_alloc_coherent(dev, s,
				&hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
		if (!hisi_hba->complete_hdr[i])
			goto err_out;
	}

1663 1664 1665
	s = sizeof(struct hisi_sas_slot_buf_table);
	hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
	if (!hisi_hba->buffer_pool)
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
		goto err_out;

	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
	hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
					    GFP_KERNEL);
	if (!hisi_hba->itct)
		goto err_out;

	memset(hisi_hba->itct, 0, s);

1676
	hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
1677 1678 1679 1680 1681
					   sizeof(struct hisi_sas_slot),
					   GFP_KERNEL);
	if (!hisi_hba->slot_info)
		goto err_out;

1682
	s = max_command_entries * sizeof(struct hisi_sas_iost);
1683 1684 1685 1686 1687
	hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
					    GFP_KERNEL);
	if (!hisi_hba->iost)
		goto err_out;

1688
	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
1689 1690 1691 1692 1693
	hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
				&hisi_hba->breakpoint_dma, GFP_KERNEL);
	if (!hisi_hba->breakpoint)
		goto err_out;

1694
	hisi_hba->slot_index_count = max_command_entries;
1695
	s = hisi_hba->slot_index_count / BITS_PER_BYTE;
J
John Garry 已提交
1696 1697 1698 1699
	hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
	if (!hisi_hba->slot_index_tags)
		goto err_out;

1700 1701 1702 1703 1704 1705
	s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
	hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
				&hisi_hba->initial_fis_dma, GFP_KERNEL);
	if (!hisi_hba->initial_fis)
		goto err_out;

1706
	s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
1707 1708 1709 1710
	hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
				&hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
	if (!hisi_hba->sata_breakpoint)
		goto err_out;
1711
	hisi_sas_init_mem(hisi_hba);
1712

J
John Garry 已提交
1713 1714
	hisi_sas_slot_index_init(hisi_hba);

J
John Garry 已提交
1715 1716 1717 1718 1719 1720
	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;
	}

1721 1722 1723 1724
	return 0;
err_out:
	return -ENOMEM;
}
1725
EXPORT_SYMBOL_GPL(hisi_sas_alloc);
1726

1727
void hisi_sas_free(struct hisi_hba *hisi_hba)
J
John Garry 已提交
1728
{
1729
	struct device *dev = hisi_hba->dev;
1730
	int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
J
John Garry 已提交
1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745

	for (i = 0; i < hisi_hba->queue_count; i++) {
		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
		if (hisi_hba->cmd_hdr[i])
			dma_free_coherent(dev, s,
					  hisi_hba->cmd_hdr[i],
					  hisi_hba->cmd_hdr_dma[i]);

		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
		if (hisi_hba->complete_hdr[i])
			dma_free_coherent(dev, s,
					  hisi_hba->complete_hdr[i],
					  hisi_hba->complete_hdr_dma[i]);
	}

1746
	dma_pool_destroy(hisi_hba->buffer_pool);
J
John Garry 已提交
1747 1748 1749 1750 1751 1752

	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
	if (hisi_hba->itct)
		dma_free_coherent(dev, s,
				  hisi_hba->itct, hisi_hba->itct_dma);

1753
	s = max_command_entries * sizeof(struct hisi_sas_iost);
J
John Garry 已提交
1754 1755 1756 1757
	if (hisi_hba->iost)
		dma_free_coherent(dev, s,
				  hisi_hba->iost, hisi_hba->iost_dma);

1758
	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
J
John Garry 已提交
1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770
	if (hisi_hba->breakpoint)
		dma_free_coherent(dev, s,
				  hisi_hba->breakpoint,
				  hisi_hba->breakpoint_dma);


	s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
	if (hisi_hba->initial_fis)
		dma_free_coherent(dev, s,
				  hisi_hba->initial_fis,
				  hisi_hba->initial_fis_dma);

1771
	s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
J
John Garry 已提交
1772 1773 1774 1775 1776
	if (hisi_hba->sata_breakpoint)
		dma_free_coherent(dev, s,
				  hisi_hba->sata_breakpoint,
				  hisi_hba->sata_breakpoint_dma);

J
John Garry 已提交
1777 1778
	if (hisi_hba->wq)
		destroy_workqueue(hisi_hba->wq);
J
John Garry 已提交
1779
}
1780
EXPORT_SYMBOL_GPL(hisi_sas_free);
1781

1782 1783 1784 1785 1786 1787 1788 1789
static 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);
}

1790
int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
J
John Garry 已提交
1791
{
1792 1793 1794
	struct device *dev = hisi_hba->dev;
	struct platform_device *pdev = hisi_hba->platform_dev;
	struct device_node *np = pdev ? pdev->dev.of_node : NULL;
1795
	struct clk *refclk;
J
John Garry 已提交
1796

1797
	if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
1798 1799 1800 1801
					  SAS_ADDR_SIZE)) {
		dev_err(dev, "could not get property sas-addr\n");
		return -ENOENT;
	}
J
John Garry 已提交
1802

1803
	if (np) {
1804 1805 1806 1807
		/*
		 * These properties are only required for platform device-based
		 * controller with DT firmware.
		 */
1808 1809
		hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
					"hisilicon,sas-syscon");
1810 1811 1812 1813
		if (IS_ERR(hisi_hba->ctrl)) {
			dev_err(dev, "could not get syscon\n");
			return -ENOENT;
		}
J
John Garry 已提交
1814

1815
		if (device_property_read_u32(dev, "ctrl-reset-reg",
1816 1817 1818 1819 1820
					     &hisi_hba->ctrl_reset_reg)) {
			dev_err(dev,
				"could not get property ctrl-reset-reg\n");
			return -ENOENT;
		}
J
John Garry 已提交
1821

1822
		if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
1823 1824 1825 1826 1827
					     &hisi_hba->ctrl_reset_sts_reg)) {
			dev_err(dev,
				"could not get property ctrl-reset-sts-reg\n");
			return -ENOENT;
		}
J
John Garry 已提交
1828

1829
		if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
1830 1831 1832 1833 1834
					     &hisi_hba->ctrl_clock_ena_reg)) {
			dev_err(dev,
				"could not get property ctrl-clock-ena-reg\n");
			return -ENOENT;
		}
1835 1836
	}

1837
	refclk = devm_clk_get(dev, NULL);
1838
	if (IS_ERR(refclk))
1839
		dev_dbg(dev, "no ref clk property\n");
1840 1841 1842
	else
		hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;

1843 1844 1845 1846
	if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
		dev_err(dev, "could not get property phy-count\n");
		return -ENOENT;
	}
J
John Garry 已提交
1847

1848
	if (device_property_read_u32(dev, "queue-count",
1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865
				     &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;

1866
	shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882
	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;

	init_timer(&hisi_hba->timer);

	if (hisi_sas_get_fw_info(hisi_hba) < 0)
J
John Garry 已提交
1883 1884
		goto err_out;

1885 1886 1887 1888 1889 1890
	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;
	}

J
John Garry 已提交
1891 1892 1893 1894 1895
	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;

J
John Garry 已提交
1896 1897
	if (hisi_sas_alloc(hisi_hba, shost)) {
		hisi_sas_free(hisi_hba);
1898
		goto err_out;
J
John Garry 已提交
1899
	}
1900

J
John Garry 已提交
1901 1902
	return shost;
err_out:
1903
	scsi_host_put(shost);
J
John Garry 已提交
1904 1905 1906 1907
	dev_err(dev, "shost alloc failed\n");
	return NULL;
}

1908
void hisi_sas_init_add(struct hisi_hba *hisi_hba)
1909 1910 1911 1912 1913 1914 1915 1916
{
	int i;

	for (i = 0; i < hisi_hba->n_phy; i++)
		memcpy(&hisi_hba->phy[i].dev_sas_addr,
		       hisi_hba->sas_addr,
		       SAS_ADDR_SIZE);
}
1917
EXPORT_SYMBOL_GPL(hisi_sas_init_add);
1918

J
John Garry 已提交
1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930
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);
1931 1932
	if (!shost)
		return -ENOMEM;
J
John Garry 已提交
1933 1934 1935 1936

	sha = SHOST_TO_SAS_HA(shost);
	hisi_hba = shost_priv(shost);
	platform_set_drvdata(pdev, sha);
J
John Garry 已提交
1937

J
John Garry 已提交
1938 1939 1940 1941
	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);
1942 1943 1944 1945
	if (!arr_phy || !arr_port) {
		rc = -ENOMEM;
		goto err_out_ha;
	}
J
John Garry 已提交
1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956

	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);
1957 1958
	shost->can_queue = hisi_hba->hw->max_command_entries;
	shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
J
John Garry 已提交
1959 1960

	sha->sas_ha_name = DRV_NAME;
1961
	sha->dev = hisi_hba->dev;
J
John Garry 已提交
1962 1963 1964 1965 1966 1967 1968 1969 1970 1971
	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;
	}

1972 1973
	hisi_sas_init_add(hisi_hba);

J
John Garry 已提交
1974 1975 1976 1977 1978 1979 1980 1981
	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;

1982 1983 1984 1985
	rc = hisi_hba->hw->hw_init(hisi_hba);
	if (rc)
		goto err_out_register_ha;

J
John Garry 已提交
1986 1987 1988 1989 1990 1991 1992
	scsi_scan_host(shost);

	return 0;

err_out_register_ha:
	scsi_remove_host(shost);
err_out_ha:
1993
	hisi_sas_free(hisi_hba);
1994
	scsi_host_put(shost);
J
John Garry 已提交
1995 1996 1997 1998
	return rc;
}
EXPORT_SYMBOL_GPL(hisi_sas_probe);

J
John Garry 已提交
1999 2000 2001 2002
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;
2003
	struct Scsi_Host *shost = sha->core.shost;
J
John Garry 已提交
2004 2005 2006 2007 2008

	sas_unregister_ha(sha);
	sas_remove_host(sha->core.shost);

	hisi_sas_free(hisi_hba);
2009
	scsi_host_put(shost);
J
John Garry 已提交
2010 2011 2012 2013
	return 0;
}
EXPORT_SYMBOL_GPL(hisi_sas_remove);

2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034
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);