hisi_sas_main.c 79.5 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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static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
				void *funcdata);
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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);
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u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
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{
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	switch (fis->command) {
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	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:
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		return HISI_SAS_SATA_PROTOCOL_FPDMA;
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	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:
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		return HISI_SAS_SATA_PROTOCOL_PIO;
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	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;
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	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;
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	case ATA_CMD_SET_MAX:
		switch (fis->features) {
		case ATA_SET_MAX_PASSWD:
		case ATA_SET_MAX_LOCK:
			return HISI_SAS_SATA_PROTOCOL_PIO;
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		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;
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		}
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	default:
	{
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		if (direction == DMA_NONE)
			return HISI_SAS_SATA_PROTOCOL_NONDATA;
		return HISI_SAS_SATA_PROTOCOL_PIO;
	}
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	}
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}
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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/*
 * 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);

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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)
{
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	unsigned long flags;

	if (hisi_hba->hw->slot_index_alloc || (slot_idx >=
	    hisi_hba->hw->max_command_entries - HISI_SAS_RESERVED_IPTT_CNT)) {
		spin_lock_irqsave(&hisi_hba->lock, flags);
		hisi_sas_slot_index_clear(hisi_hba, slot_idx);
		spin_unlock_irqrestore(&hisi_hba->lock, flags);
	}
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}

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);
}

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static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
				     struct scsi_cmnd *scsi_cmnd)
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{
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	int index;
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	void *bitmap = hisi_hba->slot_index_tags;
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	unsigned long flags;
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	if (scsi_cmnd)
		return scsi_cmnd->request->tag;

	spin_lock_irqsave(&hisi_hba->lock, flags);
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	index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
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				   hisi_hba->last_slot_index + 1);
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	if (index >= hisi_hba->slot_index_count) {
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		index = find_next_zero_bit(bitmap,
				hisi_hba->slot_index_count,
				hisi_hba->hw->max_command_entries -
				HISI_SAS_RESERVED_IPTT_CNT);
		if (index >= hisi_hba->slot_index_count) {
			spin_unlock_irqrestore(&hisi_hba->lock, flags);
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			return -SAS_QUEUE_FULL;
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		}
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	}
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	hisi_sas_slot_index_set(hisi_hba, index);
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	hisi_hba->last_slot_index = index;
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	spin_unlock_irqrestore(&hisi_hba->lock, flags);
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	return index;
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}

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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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	struct hisi_sas_dq *dq = &hisi_hba->dq[slot->dlvry_queue];
	unsigned long flags;
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	if (task) {
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		struct device *dev = hisi_hba->dev;
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		if (!task->lldd_task)
			return;

		task->lldd_task = NULL;

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		if (!sas_protocol_ata(task->task_proto))
			if (slot->n_elem)
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				dma_unmap_sg(dev, task->scatter,
					     task->num_scatter,
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					     task->data_dir);
	}
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	spin_lock_irqsave(&dq->lock, flags);
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	list_del_init(&slot->entry);
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	spin_unlock_irqrestore(&dq->lock, flags);
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	memset(slot, 0, offsetof(struct hisi_sas_slot, buf));

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	hisi_sas_slot_index_free(hisi_hba, slot->idx);
}
EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);

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

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static void hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
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				  struct hisi_sas_slot *slot)
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{
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	hisi_hba->hw->prep_ssp(hisi_hba, slot);
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}

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

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static void hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
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		struct hisi_sas_slot *slot,
		int device_id, int abort_flag, int tag_to_abort)
{
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	hisi_hba->hw->prep_abort(hisi_hba, slot,
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			device_id, abort_flag, tag_to_abort);
}

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static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
			       struct sas_task *task, int n_elem,
			       int n_elem_req, int n_elem_resp)
{
	struct device *dev = hisi_hba->dev;

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

static int hisi_sas_dma_map(struct hisi_hba *hisi_hba,
			    struct sas_task *task, int *n_elem,
			    int *n_elem_req, int *n_elem_resp)
{
	struct device *dev = hisi_hba->dev;
	int rc;

	if (sas_protocol_ata(task->task_proto)) {
		*n_elem = task->num_scatter;
	} else {
		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;
			}
		}
	}

	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;
	}
	return 0;

err_out_dma_unmap:
	/* It would be better to call dma_unmap_sg() here, but it's messy */
	hisi_sas_dma_unmap(hisi_hba, task, *n_elem,
			   *n_elem_req, *n_elem_resp);
prep_out:
	return rc;
}

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static int hisi_sas_task_prep(struct sas_task *task,
			      struct hisi_sas_dq **dq_pointer,
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			      bool is_tmf, struct hisi_sas_tmf_task *tmf,
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			      int *pass)
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{
	struct domain_device *device = task->dev;
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	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
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	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, rc, slot_idx;
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	int n_elem = 0, n_elem_req = 0, n_elem_resp = 0;
	struct hisi_sas_dq *dq;
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	unsigned long flags;
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	int wr_q_index;
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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 -ECOMM;
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	}
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	*dq_pointer = dq = sas_dev->dq;

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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);

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		return -ECOMM;
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	}

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	rc = hisi_sas_dma_map(hisi_hba, task, &n_elem,
			      &n_elem_req, &n_elem_resp);
	if (rc < 0)
		goto prep_out;
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	if (hisi_hba->hw->slot_index_alloc)
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		rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
	else {
		struct scsi_cmnd *scsi_cmnd = NULL;

		if (task->uldd_task) {
			struct ata_queued_cmd *qc;

			if (dev_is_sata(device)) {
				qc = task->uldd_task;
				scsi_cmnd = qc->scsicmd;
			} else {
				scsi_cmnd = task->uldd_task;
			}
		}
		rc  = hisi_sas_slot_index_alloc(hisi_hba, scsi_cmnd);
	}
	if (rc < 0)
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		goto err_out_dma_unmap;
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	slot_idx = rc;
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	slot = &hisi_hba->slot_info[slot_idx];

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	spin_lock_irqsave(&dq->lock, flags);
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	wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
	if (wr_q_index < 0) {
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		spin_unlock_irqrestore(&dq->lock, flags);
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		rc = -EAGAIN;
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		goto err_out_tag;
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	}

	list_add_tail(&slot->delivery, &dq->list);
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	list_add_tail(&slot->entry, &sas_dev->list);
	spin_unlock_irqrestore(&dq->lock, flags);
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	dlvry_queue = dq->id;
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	dlvry_queue_slot = wr_q_index;
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	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;
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	slot->tmf = tmf;
	slot->is_internal = is_tmf;
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	task->lldd_task = slot;

	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:
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		hisi_sas_task_prep_smp(hisi_hba, slot);
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		break;
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	case SAS_PROTOCOL_SSP:
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		hisi_sas_task_prep_ssp(hisi_hba, slot);
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		break;
	case SAS_PROTOCOL_SATA:
	case SAS_PROTOCOL_STP:
	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
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		hisi_sas_task_prep_ata(hisi_hba, slot);
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		break;
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	default:
		dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
			task->task_proto);
		break;
	}

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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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	++(*pass);
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	WRITE_ONCE(slot->ready, 1);
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	return 0;
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err_out_tag:
	hisi_sas_slot_index_free(hisi_hba, slot_idx);
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err_out_dma_unmap:
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	hisi_sas_dma_unmap(hisi_hba, task, n_elem,
			   n_elem_req, n_elem_resp);
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prep_out:
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	dev_err(dev, "task prep: failed[%d]!\n", rc);
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	return rc;
}

static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
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			      bool is_tmf, struct hisi_sas_tmf_task *tmf)
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{
	u32 rc;
	u32 pass = 0;
	unsigned long flags;
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	struct hisi_hba *hisi_hba;
	struct device *dev;
	struct domain_device *device = task->dev;
	struct asd_sas_port *sas_port = device->port;
530
	struct hisi_sas_dq *dq = NULL;
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531

532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548
	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;
	}

	hisi_hba = dev_to_hisi_hba(device);
	dev = hisi_hba->dev;

549 550 551 552 553 554 555
	if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) {
		if (in_softirq())
			return -EINVAL;

		down(&hisi_hba->sem);
		up(&hisi_hba->sem);
	}
556

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557
	/* protect task_prep and start_delivery sequence */
558
	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);

562 563
	if (likely(pass)) {
		spin_lock_irqsave(&dq->lock, flags);
564
		hisi_hba->hw->start_delivery(dq);
565 566
		spin_unlock_irqrestore(&dq->lock, flags);
	}
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567 568 569

	return rc;
}
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570

571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587
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;
588 589 590 591 592 593 594
		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;
595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611
	}

	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;
616
	unsigned long flags;
617 618
	int last = hisi_hba->last_dev_id;
	int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
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619 620
	int i;

621
	spin_lock_irqsave(&hisi_hba->lock, flags);
622
	for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
J
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623
		if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
624 625 626
			int queue = i % hisi_hba->queue_count;
			struct hisi_sas_dq *dq = &hisi_hba->dq[queue];

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627 628 629 630 631
			hisi_hba->devices[i].device_id = i;
			sas_dev = &hisi_hba->devices[i];
			sas_dev->dev_type = device->dev_type;
			sas_dev->hisi_hba = hisi_hba;
			sas_dev->sas_device = device;
632
			sas_dev->dq = dq;
633
			INIT_LIST_HEAD(&hisi_hba->devices[i].list);
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634 635
			break;
		}
636
		i++;
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637
	}
638
	hisi_hba->last_dev_id = i;
639
	spin_unlock_irqrestore(&hisi_hba->lock, flags);
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640 641 642 643

	return sas_dev;
}

644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679
#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;
}

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680 681 682 683 684
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;
685
	struct device *dev = hisi_hba->dev;
686
	int rc;
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687

688 689 690 691
	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) ==
709
				SAS_ADDR(device->sas_addr))
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710 711 712 713 714 715 716 717
				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));
718 719
			rc = -EINVAL;
			goto err_out;
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720 721 722
		}
	}

723 724 725
	dev_info(dev, "dev[%d:%x] found\n",
		sas_dev->device_id, sas_dev->dev_type);

726 727 728
	rc = hisi_sas_init_device(device);
	if (rc)
		goto err_out;
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729
	return 0;
730 731 732 733

err_out:
	hisi_sas_dev_gone(device);
	return rc;
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734 735
}

736
int hisi_sas_slave_configure(struct scsi_device *sdev)
737 738 739 740 741 742 743 744 745 746 747
{
	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;
}
748
EXPORT_SYMBOL_GPL(hisi_sas_slave_configure);
749

750
void hisi_sas_scan_start(struct Scsi_Host *shost)
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{
	struct hisi_hba *hisi_hba = shost_priv(shost);

754
	hisi_hba->hw->phys_init(hisi_hba);
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755
}
756
EXPORT_SYMBOL_GPL(hisi_sas_scan_start);
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757

758
int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
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{
	struct hisi_hba *hisi_hba = shost_priv(shost);
	struct sas_ha_struct *sha = &hisi_hba->sha;

763 764
	/* Wait for PHY up interrupt to occur */
	if (time < HZ)
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		return 0;

	sas_drain_work(sha);
	return 1;
}
770
EXPORT_SYMBOL_GPL(hisi_sas_scan_finished);
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772 773 774
static void hisi_sas_phyup_work(struct work_struct *work)
{
	struct hisi_sas_phy *phy =
775
		container_of(work, typeof(*phy), works[HISI_PHYE_PHY_UP]);
776 777 778 779
	struct hisi_hba *hisi_hba = phy->hisi_hba;
	struct asd_sas_phy *sas_phy = &phy->sas_phy;
	int phy_no = sas_phy->id;

780 781
	if (phy->identify.target_port_protocols == SAS_PROTOCOL_SSP)
		hisi_hba->hw->sl_notify_ssp(hisi_hba, phy_no);
782 783
	hisi_sas_bytes_dmaed(hisi_hba, phy_no);
}
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785 786 787 788 789 790 791 792 793
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);
}

794 795
static const work_func_t hisi_sas_phye_fns[HISI_PHYES_NUM] = {
	[HISI_PHYE_PHY_UP] = hisi_sas_phyup_work,
796
	[HISI_PHYE_LINK_RESET] = hisi_sas_linkreset_work,
797 798 799 800 801 802 803 804 805 806 807 808 809 810
};

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);

811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834
static void hisi_sas_wait_phyup_timedout(struct timer_list *t)
{
	struct hisi_sas_phy *phy = from_timer(phy, t, timer);
	struct hisi_hba *hisi_hba = phy->hisi_hba;
	struct device *dev = hisi_hba->dev;
	int phy_no = phy->sas_phy.id;

	dev_warn(dev, "phy%d wait phyup timeout, issuing link reset\n", phy_no);
	hisi_sas_notify_phy_event(phy, HISI_PHYE_LINK_RESET);
}

void hisi_sas_phy_oob_ready(struct hisi_hba *hisi_hba, int phy_no)
{
	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
	struct device *dev = hisi_hba->dev;

	if (!timer_pending(&phy->timer)) {
		dev_dbg(dev, "phy%d OOB ready\n", phy_no);
		phy->timer.expires = jiffies + HISI_SAS_WAIT_PHYUP_TIMEOUT * HZ;
		add_timer(&phy->timer);
	}
}
EXPORT_SYMBOL_GPL(hisi_sas_phy_oob_ready);

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835 836 837 838
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;
839
	int i;
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840 841 842

	phy->hisi_hba = hisi_hba;
	phy->port = NULL;
843 844
	phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
	phy->maximum_linkrate = hisi_hba->hw->phy_get_max_linkrate();
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845 846 847 848 849 850 851 852 853 854 855 856 857
	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;
858

859 860
	for (i = 0; i < HISI_PHYES_NUM; i++)
		INIT_WORK(&phy->works[i], hisi_sas_phye_fns[i]);
861 862

	spin_lock_init(&phy->lock);
863 864

	timer_setup(&phy->timer, hisi_sas_wait_phyup_timedout, 0);
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865 866
}

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867 868 869 870 871 872
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;
873
	struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
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874 875 876 877 878 879 880 881 882 883 884 885 886
	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);
}

887
static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
888
				     struct hisi_sas_slot *slot)
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889
{
890 891 892
	if (task) {
		unsigned long flags;
		struct task_status_struct *ts;
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893

894
		ts = &task->task_status;
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895

896 897 898 899 900 901 902 903
		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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904

905
	hisi_sas_slot_task_free(hisi_hba, task, slot);
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906 907 908 909 910
}

static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
			struct domain_device *device)
{
911 912
	struct hisi_sas_slot *slot, *slot2;
	struct hisi_sas_device *sas_dev = device->lldd_dev;
J
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913

914 915
	list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
		hisi_sas_do_release_task(hisi_hba, slot->task, slot);
J
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916 917
}

918
void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
919
{
920 921
	struct hisi_sas_device *sas_dev;
	struct domain_device *device;
922 923
	int i;

924 925 926
	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
		sas_dev = &hisi_hba->devices[i];
		device = sas_dev->sas_device;
927

928 929
		if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
		    !device)
930
			continue;
931 932

		hisi_sas_release_task(hisi_hba, device);
933 934
	}
}
935
EXPORT_SYMBOL_GPL(hisi_sas_release_tasks);
936

937 938 939 940 941 942 943
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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944 945 946 947
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);
948
	struct device *dev = hisi_hba->dev;
J
John Garry 已提交
949

950
	dev_info(dev, "dev[%d:%x] is gone\n",
J
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951 952
		 sas_dev->device_id, sas_dev->dev_type);

953 954
	if (!test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags)) {
		hisi_sas_internal_task_abort(hisi_hba, device,
955 956
				     HISI_SAS_INT_ABT_DEV, 0);

957 958
		hisi_sas_dereg_device(hisi_hba, device);

959
		down(&hisi_hba->sem);
960
		hisi_hba->hw->clear_itct(hisi_hba, sas_dev);
961
		up(&hisi_hba->sem);
962 963
		device->lldd_dev = NULL;
	}
964

965 966
	if (hisi_hba->hw->free_device)
		hisi_hba->hw->free_device(sas_dev);
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967 968
	sas_dev->dev_type = SAS_PHY_UNUSED;
}
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969 970 971 972 973 974

static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
{
	return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
}

975
static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
976 977 978 979 980 981 982 983
			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;

984 985 986
	if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
		return -EINVAL;

987 988 989 990 991 992 993
	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
994
		return -EINVAL;
995 996 997 998

	_r.maximum_linkrate = max;
	_r.minimum_linkrate = min;

999 1000 1001
	sas_phy->phy->maximum_linkrate = max;
	sas_phy->phy->minimum_linkrate = min;

1002 1003 1004 1005
	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);
1006 1007

	return 0;
1008 1009
}

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1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
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:
1023 1024
		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
		msleep(100);
1025
		hisi_hba->hw->phy_start(hisi_hba, phy_no);
J
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1026 1027 1028 1029 1030 1031 1032
		break;

	case PHY_FUNC_DISABLE:
		hisi_hba->hw->phy_disable(hisi_hba, phy_no);
		break;

	case PHY_FUNC_SET_LINK_RATE:
1033
		return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
1034 1035 1036 1037 1038 1039
	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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1040 1041 1042 1043 1044 1045
	case PHY_FUNC_RELEASE_SPINUP_HOLD:
	default:
		return -EOPNOTSUPP;
	}
	return 0;
}
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1046

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1047 1048
static void hisi_sas_task_done(struct sas_task *task)
{
1049
	del_timer(&task->slow_task->timer);
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1050 1051 1052
	complete(&task->slow_task->completion);
}

1053
static void hisi_sas_tmf_timedout(struct timer_list *t)
J
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1054
{
1055 1056
	struct sas_task_slow *slow = from_timer(slow, t, timer);
	struct sas_task *task = slow->task;
1057
	unsigned long flags;
1058
	bool is_completed = true;
1059 1060

	spin_lock_irqsave(&task->task_state_lock, flags);
1061
	if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
1062
		task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1063 1064
		is_completed = false;
	}
1065
	spin_unlock_irqrestore(&task->task_state_lock, flags);
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1066

1067 1068
	if (!is_completed)
		complete(&task->slow_task->completion);
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1069 1070 1071 1072
}

#define TASK_TIMEOUT 20
#define TASK_RETRY 3
1073
#define INTERNAL_ABORT_TIMEOUT 6
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1074 1075 1076 1077 1078 1079
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;
1080
	struct device *dev = hisi_hba->dev;
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1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091
	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;

1092 1093 1094 1095 1096 1097
		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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1098 1099
		task->task_done = hisi_sas_task_done;

1100
		task->slow_task->timer.function = hisi_sas_tmf_timedout;
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1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
		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)) {
1118 1119
				struct hisi_sas_slot *slot = task->lldd_task;

1120
				dev_err(dev, "abort tmf: TMF task timeout and not done\n");
1121
				if (slot) {
1122 1123
					struct hisi_sas_cq *cq =
					       &hisi_hba->cq[slot->dlvry_queue];
1124 1125 1126 1127 1128
					/*
					 * flush tasklet to avoid free'ing task
					 * before using task in IO completion
					 */
					tasklet_kill(&cq->tasklet);
1129
					slot->task = NULL;
1130
				}
1131

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1132
				goto ex_err;
1133 1134
			} else
				dev_err(dev, "abort tmf: TMF task timeout\n");
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1135 1136 1137
		}

		if (task->task_status.resp == SAS_TASK_COMPLETE &&
1138
		     task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
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1139 1140 1141 1142
			res = TMF_RESP_FUNC_COMPLETE;
			break;
		}

1143 1144 1145 1146 1147 1148
		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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1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177
		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:
1178 1179
	if (retry == TASK_RETRY)
		dev_warn(dev, "abort tmf: executing internal task failed!\n");
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1180 1181 1182 1183
	sas_free_task(task);
	return res;
}

1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204
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);
1205
	struct device *dev = hisi_hba->dev;
1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
	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");
	}

1231
	if (rc == TMF_RESP_FUNC_COMPLETE)
1232 1233 1234 1235 1236
		hisi_sas_release_task(hisi_hba, device);

	return rc;
}

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1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250
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);
}

1251
static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba)
1252
{
1253
	u32 state = hisi_hba->hw->get_phys_state(hisi_hba);
1254 1255 1256
	int i;

	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
1257 1258 1259 1260 1261 1262 1263
		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;

1264
		if ((sas_dev->dev_type == SAS_PHY_UNUSED)
1265
				|| !device || !device->port)
1266 1267
			continue;

1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
		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;
1279

1280 1281 1282
			/* Update linkrate of directly attached device. */
			if (!device->parent)
				device->linkrate = phy->sas_phy.linkrate;
1283

1284 1285 1286
			hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
		} else
			port->id = 0xff;
1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306
	}
}

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 */
1307 1308
		if (state & BIT(phy_no)) {
			if (do_port_check && sas_port && sas_port->port_dev) {
1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323
				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);

	}
}

1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340
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);
	}
}

1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415
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;
			}
		}
	}
}

1416
void hisi_sas_controller_reset_prepare(struct hisi_hba *hisi_hba)
1417
{
1418
	struct Scsi_Host *shost = hisi_hba->shost;
1419

1420
	down(&hisi_hba->sem);
1421
	hisi_hba->phy_state = hisi_hba->hw->get_phys_state(hisi_hba);
1422

1423
	scsi_block_requests(shost);
1424 1425
	hisi_hba->hw->wait_cmds_complete_timeout(hisi_hba, 100, 5000);

1426 1427 1428
	if (timer_pending(&hisi_hba->timer))
		del_timer_sync(&hisi_hba->timer);

1429
	set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1430 1431 1432 1433 1434 1435 1436
}
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;
1437 1438 1439 1440

	/* Init and wait for PHYs to come up and all libsas event finished. */
	hisi_hba->hw->phys_init(hisi_hba);
	msleep(1000);
1441
	hisi_sas_refresh_port_id(hisi_hba);
1442
	clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
1443
	up(&hisi_hba->sem);
1444 1445 1446

	if (hisi_hba->reject_stp_links_msk)
		hisi_sas_terminate_stp_reject(hisi_hba);
1447
	hisi_sas_reset_init_all_devices(hisi_hba);
1448
	scsi_unblock_requests(shost);
1449
	clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
1450 1451

	state = hisi_hba->hw->get_phys_state(hisi_hba);
1452 1453 1454 1455 1456 1457 1458 1459 1460 1461
	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;

1462
	if (hisi_sas_debugfs_enable && hisi_hba->debugfs_itct)
1463 1464
		queue_work(hisi_hba->wq, &hisi_hba->debugfs_work);

1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484
	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);
1485
	dev_info(dev, "controller reset complete\n");
1486

1487
	return 0;
1488 1489
}

J
John Garry 已提交
1490 1491 1492 1493 1494 1495
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;
1496 1497
	struct hisi_hba *hisi_hba;
	struct device *dev;
J
John Garry 已提交
1498 1499 1500
	int rc = TMF_RESP_FUNC_FAILED;
	unsigned long flags;

1501
	if (!sas_dev)
J
John Garry 已提交
1502
		return TMF_RESP_FUNC_FAILED;
1503 1504 1505

	hisi_hba = dev_to_hisi_hba(task->dev);
	dev = hisi_hba->dev;
J
John Garry 已提交
1506

1507
	spin_lock_irqsave(&task->task_state_lock, flags);
J
John Garry 已提交
1508
	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519
		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);
		}
1520
		spin_unlock_irqrestore(&task->task_state_lock, flags);
J
John Garry 已提交
1521 1522 1523
		rc = TMF_RESP_FUNC_COMPLETE;
		goto out;
	}
1524 1525
	task->task_state_flags |= SAS_TASK_STATE_ABORTED;
	spin_unlock_irqrestore(&task->task_state_lock, flags);
J
John Garry 已提交
1526 1527 1528 1529

	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;
1530
		u16 tag = slot->idx;
1531
		int rc2;
J
John Garry 已提交
1532 1533 1534

		int_to_scsilun(cmnd->device->lun, &lun);
		tmf_task.tmf = TMF_ABORT_TASK;
1535
		tmf_task.tag_of_task_to_be_managed = tag;
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John Garry 已提交
1536 1537 1538 1539

		rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
						  &tmf_task);

1540 1541
		rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
						   HISI_SAS_INT_ABT_CMD, tag);
1542 1543 1544 1545 1546
		if (rc2 < 0) {
			dev_err(dev, "abort task: internal abort (%d)\n", rc2);
			return TMF_RESP_FUNC_FAILED;
		}

1547 1548 1549 1550 1551 1552 1553 1554
		/*
		 * 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) {
1555
			if (task->lldd_task)
1556
				hisi_sas_do_release_task(hisi_hba, task, slot);
J
John Garry 已提交
1557 1558 1559 1560
		}
	} else if (task->task_proto & SAS_PROTOCOL_SATA ||
		task->task_proto & SAS_PROTOCOL_STP) {
		if (task->dev->dev_type == SAS_SATA_DEV) {
1561 1562 1563 1564 1565 1566
			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;
			}
1567
			hisi_sas_dereg_device(hisi_hba, device);
1568
			rc = hisi_sas_softreset_ata_disk(device);
J
John Garry 已提交
1569
		}
1570
	} else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
1571 1572 1573
		/* SMP */
		struct hisi_sas_slot *slot = task->lldd_task;
		u32 tag = slot->idx;
1574
		struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];
J
John Garry 已提交
1575

1576 1577
		rc = hisi_sas_internal_task_abort(hisi_hba, device,
			     HISI_SAS_INT_ABT_CMD, tag);
1578
		if (((rc < 0) || (rc == TMF_RESP_FUNC_FAILED)) &&
1579 1580 1581 1582 1583 1584 1585 1586
					task->lldd_task) {
			/*
			 * flush tasklet to avoid free'ing task
			 * before using task in IO completion
			 */
			tasklet_kill(&cq->tasklet);
			slot->task = NULL;
		}
J
John Garry 已提交
1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
	}

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)
{
1597 1598
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
	struct device *dev = hisi_hba->dev;
J
John Garry 已提交
1599 1600
	struct hisi_sas_tmf_task tmf_task;
	int rc = TMF_RESP_FUNC_FAILED;
1601 1602 1603 1604 1605 1606 1607 1608

	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);
J
John Garry 已提交
1609 1610 1611 1612

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

1613
	if (rc == TMF_RESP_FUNC_COMPLETE)
1614 1615
		hisi_sas_release_task(hisi_hba, device);

J
John Garry 已提交
1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631
	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)
{
1632
	struct sas_phy *local_phy = sas_get_local_phy(device);
J
John Garry 已提交
1633 1634
	int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
			(device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664
	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);

J
John Garry 已提交
1665 1666 1667 1668 1669 1670
	return rc;
}

static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
{
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
1671
	struct device *dev = hisi_hba->dev;
J
John Garry 已提交
1672 1673
	int rc = TMF_RESP_FUNC_FAILED;

1674
	rc = hisi_sas_internal_task_abort(hisi_hba, device,
1675
					HISI_SAS_INT_ABT_DEV, 0);
1676 1677 1678 1679
	if (rc < 0) {
		dev_err(dev, "I_T nexus reset: internal abort (%d)\n", rc);
		return TMF_RESP_FUNC_FAILED;
	}
1680 1681
	hisi_sas_dereg_device(hisi_hba, device);

J
John Garry 已提交
1682 1683
	rc = hisi_sas_debug_I_T_nexus_reset(device);

1684
	if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
1685
		hisi_sas_release_task(hisi_hba, device);
1686

1687
	return rc;
J
John Garry 已提交
1688 1689 1690 1691 1692 1693
}

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);
1694
	struct device *dev = hisi_hba->dev;
J
John Garry 已提交
1695 1696
	int rc = TMF_RESP_FUNC_FAILED;

1697 1698 1699 1700 1701 1702
	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);
1703 1704
		if (rc < 0) {
			dev_err(dev, "lu_reset: internal abort failed\n");
1705
			goto out;
1706
		}
1707
		hisi_sas_dereg_device(hisi_hba, device);
J
John Garry 已提交
1708

1709 1710 1711 1712
		phy = sas_get_local_phy(device);

		rc = sas_phy_reset(phy, 1);

1713
		if (rc == 0)
1714 1715 1716 1717 1718
			hisi_sas_release_task(hisi_hba, device);
		sas_put_local_phy(phy);
	} else {
		struct hisi_sas_tmf_task tmf_task = { .tmf =  TMF_LU_RESET };

1719 1720 1721 1722 1723 1724 1725 1726
		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);

1727
		rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
1728
		if (rc == TMF_RESP_FUNC_COMPLETE)
1729 1730 1731
			hisi_sas_release_task(hisi_hba, device);
	}
out:
1732
	if (rc != TMF_RESP_FUNC_COMPLETE)
1733
		dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
1734
			     sas_dev->device_id, rc);
J
John Garry 已提交
1735 1736 1737
	return rc;
}

1738 1739 1740
static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
{
	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
1741
	struct device *dev = hisi_hba->dev;
1742
	HISI_SAS_DECLARE_RST_WORK_ON_STACK(r);
1743
	int rc, i;
1744

1745 1746
	queue_work(hisi_hba->wq, &r.work);
	wait_for_completion(r.completion);
1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764
	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);
1765

1766
	return TMF_RESP_FUNC_COMPLETE;
1767 1768
}

J
John Garry 已提交
1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782
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;
1783
		tmf_task.tag_of_task_to_be_managed = tag;
J
John Garry 已提交
1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794

		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;
1795 1796 1797
		default:
			rc = TMF_RESP_FUNC_FAILED;
			break;
J
John Garry 已提交
1798 1799 1800 1801 1802
		}
	}
	return rc;
}

1803
static int
1804
hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
1805 1806 1807 1808 1809
				  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;
1810
	struct device *dev = hisi_hba->dev;
1811 1812
	struct hisi_sas_port *port;
	struct hisi_sas_slot *slot;
1813
	struct asd_sas_port *sas_port = device->port;
1814
	struct hisi_sas_cmd_hdr *cmd_hdr_base;
1815
	struct hisi_sas_dq *dq = sas_dev->dq;
1816
	int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
1817 1818
	unsigned long flags, flags_dq = 0;
	int wr_q_index;
1819

1820
	if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
1821 1822
		return -EINVAL;

1823 1824 1825
	if (!device->port)
		return -1;

1826
	port = to_hisi_sas_port(sas_port);
1827 1828

	/* simply get a slot and send abort command */
1829 1830
	rc = hisi_sas_slot_index_alloc(hisi_hba, NULL);
	if (rc < 0)
1831
		goto err_out;
1832

1833
	slot_idx = rc;
1834
	slot = &hisi_hba->slot_info[slot_idx];
1835

1836
	spin_lock_irqsave(&dq->lock, flags_dq);
1837 1838
	wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq);
	if (wr_q_index < 0) {
1839
		spin_unlock_irqrestore(&dq->lock, flags_dq);
1840
		rc = -EAGAIN;
1841
		goto err_out_tag;
1842
	}
1843 1844
	list_add_tail(&slot->delivery, &dq->list);
	spin_unlock_irqrestore(&dq->lock, flags_dq);
1845

1846
	dlvry_queue = dq->id;
1847
	dlvry_queue_slot = wr_q_index;
1848

1849 1850 1851 1852 1853 1854 1855
	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;
1856
	slot->is_internal = true;
1857 1858 1859
	task->lldd_task = slot;

	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
1860 1861
	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);
1862

1863
	hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
1864 1865
				      abort_flag, task_tag);

1866
	spin_lock_irqsave(&task->task_state_lock, flags);
1867
	task->task_state_flags |= SAS_TASK_AT_INITIATOR;
1868
	spin_unlock_irqrestore(&task->task_state_lock, flags);
1869
	WRITE_ONCE(slot->ready, 1);
1870
	/* send abort command to the chip */
1871 1872
	spin_lock_irqsave(&dq->lock, flags);
	list_add_tail(&slot->entry, &sas_dev->list);
1873
	hisi_hba->hw->start_delivery(dq);
1874
	spin_unlock_irqrestore(&dq->lock, flags);
1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901

	return 0;

err_out_tag:
	hisi_sas_slot_index_free(hisi_hba, slot_idx);
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;
1902
	struct device *dev = hisi_hba->dev;
1903 1904
	int res;

1905 1906 1907 1908 1909 1910
	/*
	 * 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.
	 */
1911
	if (!hisi_hba->hw->prep_abort)
1912
		return TMF_RESP_FUNC_FAILED;
1913 1914 1915 1916 1917 1918 1919 1920

	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;
1921
	task->slow_task->timer.function = hisi_sas_tmf_timedout;
1922
	task->slow_task->timer.expires = jiffies + INTERNAL_ABORT_TIMEOUT*HZ;
1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935
	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;

1936 1937 1938 1939
	/* 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;
1940 1941

			if (slot) {
1942 1943
				struct hisi_sas_cq *cq =
					&hisi_hba->cq[slot->dlvry_queue];
1944 1945 1946 1947 1948
				/*
				 * flush tasklet to avoid free'ing task
				 * before using task in IO completion
				 */
				tasklet_kill(&cq->tasklet);
1949
				slot->task = NULL;
1950
			}
1951
			dev_err(dev, "internal task abort: timeout and not done.\n");
1952

1953
			res = -EIO;
1954
			goto exit;
1955 1956
		} else
			dev_err(dev, "internal task abort: timeout.\n");
1957 1958
	}

1959 1960 1961 1962 1963 1964
	if (task->task_status.resp == SAS_TASK_COMPLETE &&
		task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
		res = TMF_RESP_FUNC_COMPLETE;
		goto exit;
	}

1965 1966 1967 1968 1969 1970
	if (task->task_status.resp == SAS_TASK_COMPLETE &&
		task->task_status.stat == TMF_RESP_FUNC_SUCC) {
		res = TMF_RESP_FUNC_SUCC;
		goto exit;
	}

1971
exit:
1972
	dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
1973 1974 1975 1976 1977 1978 1979 1980 1981 1982
		"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
1983 1984 1985 1986 1987
static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
{
	hisi_sas_port_notify_formed(sas_phy);
}

1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
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);
}

J
John Garry 已提交
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
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;
2012
	struct device *dev = hisi_hba->dev;
J
John Garry 已提交
2013 2014 2015 2016 2017 2018 2019 2020

	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;

2021 2022
		if (test_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags) ||
		    phy->in_reset) {
2023 2024 2025
			dev_info(dev, "ignore flutter phy%d down\n", phy_no);
			return;
		}
J
John Garry 已提交
2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044
		/* 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);

2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055
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);
2056

2057 2058
struct scsi_transport_template *hisi_sas_stt;
EXPORT_SYMBOL_GPL(hisi_sas_stt);
2059 2060

static struct sas_domain_function_template hisi_sas_transport_ops = {
J
John Garry 已提交
2061 2062
	.lldd_dev_found		= hisi_sas_dev_found,
	.lldd_dev_gone		= hisi_sas_dev_gone,
J
John Garry 已提交
2063
	.lldd_execute_task	= hisi_sas_queue_command,
J
John Garry 已提交
2064
	.lldd_control_phy	= hisi_sas_control_phy,
J
John Garry 已提交
2065 2066 2067 2068 2069 2070
	.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,
2071
	.lldd_clear_nexus_ha	= hisi_sas_clear_nexus_ha,
J
John Garry 已提交
2072
	.lldd_port_formed	= hisi_sas_port_formed,
2073
	.lldd_write_gpio	= hisi_sas_write_gpio,
2074 2075
};

2076 2077
void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
{
J
John Garry 已提交
2078 2079
	int i, s, j, max_command_entries = hisi_hba->hw->max_command_entries;
	struct hisi_sas_breakpoint *sata_breakpoint = hisi_hba->sata_breakpoint;
2080 2081 2082 2083

	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];
J
John Garry 已提交
2084 2085 2086 2087 2088
		struct hisi_sas_cmd_hdr *cmd_hdr = hisi_hba->cmd_hdr[i];

		s = sizeof(struct hisi_sas_cmd_hdr);
		for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
			memset(&cmd_hdr[j], 0, s);
2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105

		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);

J
John Garry 已提交
2106 2107 2108
	s = sizeof(struct hisi_sas_sata_breakpoint);
	for (j = 0; j < HISI_SAS_MAX_ITCT_ENTRIES; j++)
		memset(&sata_breakpoint[j], 0, s);
2109 2110 2111
}
EXPORT_SYMBOL_GPL(hisi_sas_init_mem);

2112
int hisi_sas_alloc(struct hisi_hba *hisi_hba)
2113
{
2114
	struct device *dev = hisi_hba->dev;
2115 2116 2117
	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;
2118

2119
	sema_init(&hisi_hba->sem, 1);
J
John Garry 已提交
2120
	spin_lock_init(&hisi_hba->lock);
J
John Garry 已提交
2121 2122 2123 2124 2125 2126
	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
2127 2128 2129 2130 2131
	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;
	}

2132
	for (i = 0; i < hisi_hba->queue_count; i++) {
2133
		struct hisi_sas_cq *cq = &hisi_hba->cq[i];
2134
		struct hisi_sas_dq *dq = &hisi_hba->dq[i];
2135 2136 2137 2138 2139

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

2140
		/* Delivery queue structure */
2141
		spin_lock_init(&dq->lock);
2142
		INIT_LIST_HEAD(&dq->list);
2143 2144 2145
		dq->id = i;
		dq->hisi_hba = hisi_hba;

2146 2147
		/* Delivery queue */
		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2148 2149 2150
		hisi_hba->cmd_hdr[i] = dmam_alloc_coherent(dev, s,
						&hisi_hba->cmd_hdr_dma[i],
						GFP_KERNEL);
2151 2152 2153 2154 2155
		if (!hisi_hba->cmd_hdr[i])
			goto err_out;

		/* Completion queue */
		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
2156 2157 2158
		hisi_hba->complete_hdr[i] = dmam_alloc_coherent(dev, s,
						&hisi_hba->complete_hdr_dma[i],
						GFP_KERNEL);
2159 2160 2161 2162 2163
		if (!hisi_hba->complete_hdr[i])
			goto err_out;
	}

	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
2164
	hisi_hba->itct = dmam_alloc_coherent(dev, s, &hisi_hba->itct_dma,
J
John Garry 已提交
2165
					     GFP_KERNEL | __GFP_ZERO);
2166 2167 2168
	if (!hisi_hba->itct)
		goto err_out;

2169
	hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
2170 2171 2172 2173 2174
					   sizeof(struct hisi_sas_slot),
					   GFP_KERNEL);
	if (!hisi_hba->slot_info)
		goto err_out;

2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203
	/* 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);
		}
	}

2204
	s = max_command_entries * sizeof(struct hisi_sas_iost);
2205 2206
	hisi_hba->iost = dmam_alloc_coherent(dev, s, &hisi_hba->iost_dma,
					     GFP_KERNEL);
2207 2208 2209
	if (!hisi_hba->iost)
		goto err_out;

2210
	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
2211 2212 2213
	hisi_hba->breakpoint = dmam_alloc_coherent(dev, s,
						   &hisi_hba->breakpoint_dma,
						   GFP_KERNEL);
2214 2215 2216
	if (!hisi_hba->breakpoint)
		goto err_out;

2217
	hisi_hba->slot_index_count = max_command_entries;
2218
	s = hisi_hba->slot_index_count / BITS_PER_BYTE;
J
John Garry 已提交
2219 2220 2221 2222
	hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
	if (!hisi_hba->slot_index_tags)
		goto err_out;

2223
	s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
2224 2225 2226
	hisi_hba->initial_fis = dmam_alloc_coherent(dev, s,
						    &hisi_hba->initial_fis_dma,
						    GFP_KERNEL);
2227 2228 2229
	if (!hisi_hba->initial_fis)
		goto err_out;

2230
	s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
2231 2232 2233
	hisi_hba->sata_breakpoint = dmam_alloc_coherent(dev, s,
					&hisi_hba->sata_breakpoint_dma,
					GFP_KERNEL);
2234 2235
	if (!hisi_hba->sata_breakpoint)
		goto err_out;
2236
	hisi_sas_init_mem(hisi_hba);
2237

J
John Garry 已提交
2238
	hisi_sas_slot_index_init(hisi_hba);
2239 2240
	hisi_hba->last_slot_index = hisi_hba->hw->max_command_entries -
		HISI_SAS_RESERVED_IPTT_CNT;
J
John Garry 已提交
2241

J
John Garry 已提交
2242 2243 2244 2245 2246 2247
	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;
	}

2248 2249 2250 2251
	return 0;
err_out:
	return -ENOMEM;
}
2252
EXPORT_SYMBOL_GPL(hisi_sas_alloc);
2253

2254
void hisi_sas_free(struct hisi_hba *hisi_hba)
J
John Garry 已提交
2255
{
J
John Garry 已提交
2256 2257
	if (hisi_hba->wq)
		destroy_workqueue(hisi_hba->wq);
J
John Garry 已提交
2258
}
2259
EXPORT_SYMBOL_GPL(hisi_sas_free);
2260

2261
void hisi_sas_rst_work_handler(struct work_struct *work)
2262 2263 2264 2265 2266 2267
{
	struct hisi_hba *hisi_hba =
		container_of(work, struct hisi_hba, rst_work);

	hisi_sas_controller_reset(hisi_hba);
}
2268
EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
2269

2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280
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);

2281
int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
J
John Garry 已提交
2282
{
2283 2284 2285
	struct device *dev = hisi_hba->dev;
	struct platform_device *pdev = hisi_hba->platform_dev;
	struct device_node *np = pdev ? pdev->dev.of_node : NULL;
2286
	struct clk *refclk;
J
John Garry 已提交
2287

2288
	if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
2289 2290 2291 2292
					  SAS_ADDR_SIZE)) {
		dev_err(dev, "could not get property sas-addr\n");
		return -ENOENT;
	}
J
John Garry 已提交
2293

2294
	if (np) {
2295 2296 2297 2298
		/*
		 * These properties are only required for platform device-based
		 * controller with DT firmware.
		 */
2299 2300
		hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
					"hisilicon,sas-syscon");
2301 2302 2303 2304
		if (IS_ERR(hisi_hba->ctrl)) {
			dev_err(dev, "could not get syscon\n");
			return -ENOENT;
		}
J
John Garry 已提交
2305

2306
		if (device_property_read_u32(dev, "ctrl-reset-reg",
2307 2308 2309 2310 2311
					     &hisi_hba->ctrl_reset_reg)) {
			dev_err(dev,
				"could not get property ctrl-reset-reg\n");
			return -ENOENT;
		}
J
John Garry 已提交
2312

2313
		if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
2314 2315 2316 2317 2318
					     &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
2319

2320
		if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
2321 2322 2323 2324 2325
					     &hisi_hba->ctrl_clock_ena_reg)) {
			dev_err(dev,
				"could not get property ctrl-clock-ena-reg\n");
			return -ENOENT;
		}
2326 2327
	}

2328
	refclk = devm_clk_get(dev, NULL);
2329
	if (IS_ERR(refclk))
2330
		dev_dbg(dev, "no ref clk property\n");
2331 2332 2333
	else
		hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;

2334 2335 2336 2337
	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
2338

2339
	if (device_property_read_u32(dev, "queue-count",
2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356
				     &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;

2357
	shost = scsi_host_alloc(hw->sht, sizeof(*hisi_hba));
2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370
	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;

2371
	timer_setup(&hisi_hba->timer, NULL, 0);
2372 2373

	if (hisi_sas_get_fw_info(hisi_hba) < 0)
J
John Garry 已提交
2374 2375
		goto err_out;

2376 2377 2378 2379 2380 2381
	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
2382 2383 2384 2385 2386
	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;

2387 2388 2389 2390 2391 2392 2393
	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;
	}

2394
	if (hisi_sas_alloc(hisi_hba)) {
J
John Garry 已提交
2395
		hisi_sas_free(hisi_hba);
2396
		goto err_out;
J
John Garry 已提交
2397
	}
2398

J
John Garry 已提交
2399 2400
	return shost;
err_out:
2401
	scsi_host_put(shost);
J
John Garry 已提交
2402 2403 2404 2405 2406
	dev_err(dev, "shost alloc failed\n");
	return NULL;
}

int hisi_sas_probe(struct platform_device *pdev,
2407
		   const struct hisi_sas_hw *hw)
J
John Garry 已提交
2408 2409 2410 2411 2412 2413 2414 2415 2416 2417
{
	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);
2418 2419
	if (!shost)
		return -ENOMEM;
J
John Garry 已提交
2420 2421 2422 2423

	sha = SHOST_TO_SAS_HA(shost);
	hisi_hba = shost_priv(shost);
	platform_set_drvdata(pdev, sha);
J
John Garry 已提交
2424

J
John Garry 已提交
2425 2426 2427 2428
	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);
2429 2430 2431 2432
	if (!arr_phy || !arr_port) {
		rc = -ENOMEM;
		goto err_out_ha;
	}
J
John Garry 已提交
2433 2434 2435 2436 2437 2438 2439 2440 2441 2442

	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;
2443 2444 2445 2446 2447 2448 2449 2450 2451
	if (hisi_hba->hw->slot_index_alloc) {
		shost->can_queue = hisi_hba->hw->max_command_entries;
		shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
	} else {
		shost->can_queue = hisi_hba->hw->max_command_entries -
			HISI_SAS_RESERVED_IPTT_CNT;
		shost->cmd_per_lun = hisi_hba->hw->max_command_entries -
			HISI_SAS_RESERVED_IPTT_CNT;
	}
J
John Garry 已提交
2452 2453

	sha->sas_ha_name = DRV_NAME;
2454
	sha->dev = hisi_hba->dev;
J
John Garry 已提交
2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472
	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;

2473 2474 2475 2476
	rc = hisi_hba->hw->hw_init(hisi_hba);
	if (rc)
		goto err_out_register_ha;

J
John Garry 已提交
2477 2478 2479 2480 2481 2482 2483
	scsi_scan_host(shost);

	return 0;

err_out_register_ha:
	scsi_remove_host(shost);
err_out_ha:
2484
	hisi_sas_free(hisi_hba);
2485
	scsi_host_put(shost);
J
John Garry 已提交
2486 2487 2488 2489
	return rc;
}
EXPORT_SYMBOL_GPL(hisi_sas_probe);

2490 2491
struct dentry *hisi_sas_debugfs_dir;

2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504
static void hisi_sas_debugfs_snapshot_cq_reg(struct hisi_hba *hisi_hba)
{
	int queue_entry_size = hisi_hba->hw->complete_hdr_size;
	int i;

	for (i = 0; i < hisi_hba->queue_count; i++)
		memcpy(hisi_hba->debugfs_complete_hdr[i],
		       hisi_hba->complete_hdr[i],
		       HISI_SAS_QUEUE_SLOTS * queue_entry_size);
}

static void hisi_sas_debugfs_snapshot_dq_reg(struct hisi_hba *hisi_hba)
{
2505
	int queue_entry_size = sizeof(struct hisi_sas_cmd_hdr);
2506 2507
	int i;

J
John Garry 已提交
2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518
	for (i = 0; i < hisi_hba->queue_count; i++) {
		struct hisi_sas_cmd_hdr	*debugfs_cmd_hdr, *cmd_hdr;
		int j;

		debugfs_cmd_hdr = hisi_hba->debugfs_cmd_hdr[i];
		cmd_hdr = hisi_hba->cmd_hdr[i];

		for (j = 0; j < HISI_SAS_QUEUE_SLOTS; j++)
			memcpy(&debugfs_cmd_hdr[j], &cmd_hdr[j],
			       queue_entry_size);
	}
2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578
}

static void hisi_sas_debugfs_snapshot_port_reg(struct hisi_hba *hisi_hba)
{
	const struct hisi_sas_debugfs_reg *port =
		hisi_hba->hw->debugfs_reg_port;
	int i, phy_cnt;
	u32 offset;
	u32 *databuf;

	for (phy_cnt = 0; phy_cnt < hisi_hba->n_phy; phy_cnt++) {
		databuf = (u32 *)hisi_hba->debugfs_port_reg[phy_cnt];
		for (i = 0; i < port->count; i++, databuf++) {
			offset = port->base_off + 4 * i;
			*databuf = port->read_port_reg(hisi_hba, phy_cnt,
						       offset);
		}
	}
}

static void hisi_sas_debugfs_snapshot_global_reg(struct hisi_hba *hisi_hba)
{
	u32 *databuf = (u32 *)hisi_hba->debugfs_global_reg;
	const struct hisi_sas_debugfs_reg *global =
		hisi_hba->hw->debugfs_reg_global;
	int i;

	for (i = 0; i < global->count; i++, databuf++)
		*databuf = global->read_global_reg(hisi_hba, 4 * i);
}

static void hisi_sas_debugfs_snapshot_itct_reg(struct hisi_hba *hisi_hba)
{
	void *databuf = hisi_hba->debugfs_itct;
	struct hisi_sas_itct *itct;
	int i;

	itct = hisi_hba->itct;

	for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, itct++) {
		memcpy(databuf, itct, sizeof(struct hisi_sas_itct));
		databuf += sizeof(struct hisi_sas_itct);
	}
}

static void hisi_sas_debugfs_snapshot_iost_reg(struct hisi_hba *hisi_hba)
{
	int max_command_entries = hisi_hba->hw->max_command_entries;
	void *databuf = hisi_hba->debugfs_iost;
	struct hisi_sas_iost *iost;
	int i;

	iost = hisi_hba->iost;

	for (i = 0; i < max_command_entries; i++, iost++) {
		memcpy(databuf, iost, sizeof(struct hisi_sas_iost));
		databuf += sizeof(struct hisi_sas_iost);
	}
}

2579
static const char *
2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605
hisi_sas_debugfs_to_reg_name(int off, int base_off,
			     const struct hisi_sas_debugfs_reg_lu *lu)
{
	for (; lu->name; lu++) {
		if (off == lu->off - base_off)
			return lu->name;
	}

	return NULL;
}

static void hisi_sas_debugfs_print_reg(u32 *regs_val, const void *ptr,
				       struct seq_file *s)
{
	const struct hisi_sas_debugfs_reg *reg = ptr;
	int i;

	for (i = 0; i < reg->count; i++) {
		int off = i * 4;
		const char *name;

		name = hisi_sas_debugfs_to_reg_name(off, reg->base_off,
						    reg->lu);

		if (name)
			seq_printf(s, "0x%08x 0x%08x %s\n", off,
2606
				   regs_val[i], name);
2607 2608
		else
			seq_printf(s, "0x%08x 0x%08x\n", off,
2609
				   regs_val[i]);
2610 2611 2612 2613 2614 2615 2616 2617 2618
	}
}

static int hisi_sas_debugfs_global_show(struct seq_file *s, void *p)
{
	struct hisi_hba *hisi_hba = s->private;
	const struct hisi_sas_hw *hw = hisi_hba->hw;
	const struct hisi_sas_debugfs_reg *reg_global = hw->debugfs_reg_global;

2619
	hisi_sas_debugfs_print_reg(hisi_hba->debugfs_global_reg,
2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638
				   reg_global, s);

	return 0;
}

static int hisi_sas_debugfs_global_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, hisi_sas_debugfs_global_show,
			   inode->i_private);
}

static const struct file_operations hisi_sas_debugfs_global_fops = {
	.open = hisi_sas_debugfs_global_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.owner = THIS_MODULE,
};

2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664
static int hisi_sas_debugfs_port_show(struct seq_file *s, void *p)
{
	struct hisi_sas_phy *phy = s->private;
	struct hisi_hba *hisi_hba = phy->hisi_hba;
	const struct hisi_sas_hw *hw = hisi_hba->hw;
	const struct hisi_sas_debugfs_reg *reg_port = hw->debugfs_reg_port;
	u32 *databuf = hisi_hba->debugfs_port_reg[phy->sas_phy.id];

	hisi_sas_debugfs_print_reg(databuf, reg_port, s);

	return 0;
}

static int hisi_sas_debugfs_port_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, hisi_sas_debugfs_port_show, inode->i_private);
}

static const struct file_operations hisi_sas_debugfs_port_fops = {
	.open = hisi_sas_debugfs_port_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.owner = THIS_MODULE,
};

2665
static int hisi_sas_show_row_64(struct seq_file *s, int index,
2666
				int sz, __le64 *ptr)
2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682
{
	int i;

	/* completion header size not fixed per HW version */
	seq_printf(s, "index %04d:\n\t", index);
	for (i = 1; i <= sz / 8; i++, ptr++) {
		seq_printf(s, " 0x%016llx", le64_to_cpu(*ptr));
		if (!(i % 2))
			seq_puts(s, "\n\t");
	}

	seq_puts(s, "\n");

	return 0;
}

2683
static int hisi_sas_show_row_32(struct seq_file *s, int index,
2684
				int sz, __le32 *ptr)
2685 2686 2687 2688 2689 2690
{
	int i;

	/* completion header size not fixed per HW version */
	seq_printf(s, "index %04d:\n\t", index);
	for (i = 1; i <= sz / 4; i++, ptr++) {
2691
		seq_printf(s, " 0x%08x", le32_to_cpu(*ptr));
2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704
		if (!(i % 4))
			seq_puts(s, "\n\t");
	}
	seq_puts(s, "\n");

	return 0;
}

static int hisi_sas_cq_show_slot(struct seq_file *s, int slot, void *cq_ptr)
{
	struct hisi_sas_cq *cq = cq_ptr;
	struct hisi_hba *hisi_hba = cq->hisi_hba;
	void *complete_queue = hisi_hba->debugfs_complete_hdr[cq->id];
2705
	__le32 *complete_hdr = complete_queue +
2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738
			(hisi_hba->hw->complete_hdr_size * slot);

	return hisi_sas_show_row_32(s, slot,
				hisi_hba->hw->complete_hdr_size,
				complete_hdr);
}

static int hisi_sas_debugfs_cq_show(struct seq_file *s, void *p)
{
	struct hisi_sas_cq *cq = s->private;
	int slot, ret;

	for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
		ret = hisi_sas_cq_show_slot(s, slot, cq);
		if (ret)
			return ret;
	}
	return 0;
}

static int hisi_sas_debugfs_cq_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, hisi_sas_debugfs_cq_show, inode->i_private);
}

static const struct file_operations hisi_sas_debugfs_cq_fops = {
	.open = hisi_sas_debugfs_cq_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.owner = THIS_MODULE,
};

2739 2740 2741 2742 2743
static int hisi_sas_dq_show_slot(struct seq_file *s, int slot, void *dq_ptr)
{
	struct hisi_sas_dq *dq = dq_ptr;
	struct hisi_hba *hisi_hba = dq->hisi_hba;
	void *cmd_queue = hisi_hba->debugfs_cmd_hdr[dq->id];
2744 2745
	__le32 *cmd_hdr = cmd_queue +
		sizeof(struct hisi_sas_cmd_hdr) * slot;
2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775

	return hisi_sas_show_row_32(s, slot, sizeof(struct hisi_sas_cmd_hdr),
				    cmd_hdr);
}

static int hisi_sas_debugfs_dq_show(struct seq_file *s, void *p)
{
	int slot, ret;

	for (slot = 0; slot < HISI_SAS_QUEUE_SLOTS; slot++) {
		ret = hisi_sas_dq_show_slot(s, slot, s->private);
		if (ret)
			return ret;
	}
	return 0;
}

static int hisi_sas_debugfs_dq_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, hisi_sas_debugfs_dq_show, inode->i_private);
}

static const struct file_operations hisi_sas_debugfs_dq_fops = {
	.open = hisi_sas_debugfs_dq_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.owner = THIS_MODULE,
};

2776 2777 2778 2779 2780
static int hisi_sas_debugfs_iost_show(struct seq_file *s, void *p)
{
	struct hisi_hba *hisi_hba = s->private;
	struct hisi_sas_iost *debugfs_iost = hisi_hba->debugfs_iost;
	int i, ret, max_command_entries = hisi_hba->hw->max_command_entries;
2781
	__le64 *iost = &debugfs_iost->qw0;
2782 2783 2784

	for (i = 0; i < max_command_entries; i++, debugfs_iost++) {
		ret = hisi_sas_show_row_64(s, i, sizeof(*debugfs_iost),
2785
					   iost);
2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805
		if (ret)
			return ret;
	}

	return 0;
}

static int hisi_sas_debugfs_iost_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, hisi_sas_debugfs_iost_show, inode->i_private);
}

static const struct file_operations hisi_sas_debugfs_iost_fops = {
	.open = hisi_sas_debugfs_iost_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.owner = THIS_MODULE,
};

2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835
static int hisi_sas_debugfs_itct_show(struct seq_file *s, void *p)
{
	int i, ret;
	struct hisi_hba *hisi_hba = s->private;
	struct hisi_sas_itct *debugfs_itct = hisi_hba->debugfs_itct;
	__le64 *itct = &debugfs_itct->qw0;

	for (i = 0; i < HISI_SAS_MAX_ITCT_ENTRIES; i++, debugfs_itct++) {
		ret = hisi_sas_show_row_64(s, i, sizeof(*debugfs_itct),
					   itct);
		if (ret)
			return ret;
	}

	return 0;
}

static int hisi_sas_debugfs_itct_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, hisi_sas_debugfs_itct_show, inode->i_private);
}

static const struct file_operations hisi_sas_debugfs_itct_fops = {
	.open = hisi_sas_debugfs_itct_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.owner = THIS_MODULE,
};

2836 2837 2838
static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
{
	struct dentry *dump_dentry;
2839 2840 2841
	struct dentry *dentry;
	char name[256];
	int p;
2842
	int c;
2843
	int d;
2844 2845 2846 2847

	/* Create dump dir inside device dir */
	dump_dentry = debugfs_create_dir("dump", hisi_hba->debugfs_dir);
	hisi_hba->debugfs_dump_dentry = dump_dentry;
2848

2849 2850
	debugfs_create_file("global", 0400, dump_dentry, hisi_hba,
			    &hisi_sas_debugfs_global_fops);
2851 2852 2853 2854 2855

	/* Create port dir and files */
	dentry = debugfs_create_dir("port", dump_dentry);
	for (p = 0; p < hisi_hba->n_phy; p++) {
		snprintf(name, 256, "%d", p);
2856 2857 2858

		debugfs_create_file(name, 0400, dentry, &hisi_hba->phy[p],
				    &hisi_sas_debugfs_port_fops);
2859 2860
	}

2861 2862 2863 2864 2865
	/* Create CQ dir and files */
	dentry = debugfs_create_dir("cq", dump_dentry);
	for (c = 0; c < hisi_hba->queue_count; c++) {
		snprintf(name, 256, "%d", c);

2866 2867
		debugfs_create_file(name, 0400, dentry, &hisi_hba->cq[c],
				    &hisi_sas_debugfs_cq_fops);
2868 2869
	}

2870 2871 2872 2873 2874
	/* Create DQ dir and files */
	dentry = debugfs_create_dir("dq", dump_dentry);
	for (d = 0; d < hisi_hba->queue_count; d++) {
		snprintf(name, 256, "%d", d);

2875 2876
		debugfs_create_file(name, 0400, dentry, &hisi_hba->dq[d],
				    &hisi_sas_debugfs_dq_fops);
2877 2878
	}

2879 2880
	debugfs_create_file("iost", 0400, dump_dentry, hisi_hba,
			    &hisi_sas_debugfs_iost_fops);
2881

2882 2883 2884
	debugfs_create_file("itct", 0400, dump_dentry, hisi_hba,
			    &hisi_sas_debugfs_itct_fops);

2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908
	return;
}

static void hisi_sas_debugfs_snapshot_regs(struct hisi_hba *hisi_hba)
{
	hisi_hba->hw->snapshot_prepare(hisi_hba);

	hisi_sas_debugfs_snapshot_global_reg(hisi_hba);
	hisi_sas_debugfs_snapshot_port_reg(hisi_hba);
	hisi_sas_debugfs_snapshot_cq_reg(hisi_hba);
	hisi_sas_debugfs_snapshot_dq_reg(hisi_hba);
	hisi_sas_debugfs_snapshot_itct_reg(hisi_hba);
	hisi_sas_debugfs_snapshot_iost_reg(hisi_hba);

	hisi_sas_debugfs_create_files(hisi_hba);

	hisi_hba->hw->snapshot_restore(hisi_hba);
}

void hisi_sas_debugfs_work_handler(struct work_struct *work)
{
	struct hisi_hba *hisi_hba =
		container_of(work, struct hisi_hba, debugfs_work);

2909 2910 2911 2912
	if (hisi_hba->debugfs_snapshot)
		return;
	hisi_hba->debugfs_snapshot = true;

2913 2914 2915 2916
	hisi_sas_debugfs_snapshot_regs(hisi_hba);
}
EXPORT_SYMBOL_GPL(hisi_sas_debugfs_work_handler);

2917 2918
void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba)
{
2919
	int max_command_entries = hisi_hba->hw->max_command_entries;
2920
	struct device *dev = hisi_hba->dev;
2921 2922
	int p, i, c, d;
	size_t sz;
2923 2924 2925

	hisi_hba->debugfs_dir = debugfs_create_dir(dev_name(dev),
						   hisi_sas_debugfs_dir);
2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955

	/* Alloc buffer for global */
	sz = hisi_hba->hw->debugfs_reg_global->count * 4;
	hisi_hba->debugfs_global_reg =
		devm_kmalloc(dev, sz, GFP_KERNEL);

	if (!hisi_hba->debugfs_global_reg)
		goto fail_global;

	/* Alloc buffer for port */
	sz = hisi_hba->hw->debugfs_reg_port->count * 4;
	for (p = 0; p < hisi_hba->n_phy; p++) {
		hisi_hba->debugfs_port_reg[p] =
			devm_kmalloc(dev, sz, GFP_KERNEL);

		if (!hisi_hba->debugfs_port_reg[p])
			goto fail_port;
	}

	/* Alloc buffer for cq */
	sz = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
	for (c = 0; c < hisi_hba->queue_count; c++) {
		hisi_hba->debugfs_complete_hdr[c] =
			devm_kmalloc(dev, sz, GFP_KERNEL);

		if (!hisi_hba->debugfs_complete_hdr[c])
			goto fail_cq;
	}

	/* Alloc buffer for dq */
2956
	sz = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995
	for (d = 0; d < hisi_hba->queue_count; d++) {
		hisi_hba->debugfs_cmd_hdr[d] =
			devm_kmalloc(dev, sz, GFP_KERNEL);

		if (!hisi_hba->debugfs_cmd_hdr[d])
			goto fail_iost_dq;
	}

	/* Alloc buffer for iost */
	sz = max_command_entries * sizeof(struct hisi_sas_iost);

	hisi_hba->debugfs_iost = devm_kmalloc(dev, sz, GFP_KERNEL);
	if (!hisi_hba->debugfs_iost)
		goto fail_iost_dq;

	/* Alloc buffer for itct */
	/* New memory allocation must be locate before itct */
	sz = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);

	hisi_hba->debugfs_itct = devm_kmalloc(dev, sz, GFP_KERNEL);
	if (!hisi_hba->debugfs_itct)
		goto fail_itct;

	return;
fail_itct:
	devm_kfree(dev, hisi_hba->debugfs_iost);
fail_iost_dq:
	for (i = 0; i < d; i++)
		devm_kfree(dev, hisi_hba->debugfs_cmd_hdr[i]);
fail_cq:
	for (i = 0; i < c; i++)
		devm_kfree(dev, hisi_hba->debugfs_complete_hdr[i]);
fail_port:
	for (i = 0; i < p; i++)
		devm_kfree(dev, hisi_hba->debugfs_port_reg[i]);
	devm_kfree(dev, hisi_hba->debugfs_global_reg);
fail_global:
	debugfs_remove_recursive(hisi_hba->debugfs_dir);
	dev_dbg(dev, "failed to init debugfs!\n");
2996 2997 2998 2999 3000 3001 3002 3003 3004
}
EXPORT_SYMBOL_GPL(hisi_sas_debugfs_init);

void hisi_sas_debugfs_exit(struct hisi_hba *hisi_hba)
{
	debugfs_remove_recursive(hisi_hba->debugfs_dir);
}
EXPORT_SYMBOL_GPL(hisi_sas_debugfs_exit);

J
John Garry 已提交
3005 3006 3007 3008
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;
3009
	struct Scsi_Host *shost = sha->core.shost;
J
John Garry 已提交
3010

3011 3012 3013
	if (timer_pending(&hisi_hba->timer))
		del_timer(&hisi_hba->timer);

J
John Garry 已提交
3014 3015 3016 3017
	sas_unregister_ha(sha);
	sas_remove_host(sha->core.shost);

	hisi_sas_free(hisi_hba);
3018
	scsi_host_put(shost);
J
John Garry 已提交
3019 3020 3021 3022
	return 0;
}
EXPORT_SYMBOL_GPL(hisi_sas_remove);

3023 3024 3025 3026 3027
bool hisi_sas_debugfs_enable;
EXPORT_SYMBOL_GPL(hisi_sas_debugfs_enable);
module_param_named(debugfs_enable, hisi_sas_debugfs_enable, bool, 0444);
MODULE_PARM_DESC(hisi_sas_debugfs_enable, "Enable driver debugfs (default disabled)");

3028 3029 3030 3031 3032 3033
static __init int hisi_sas_init(void)
{
	hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
	if (!hisi_sas_stt)
		return -ENOMEM;

3034 3035 3036
	if (hisi_sas_debugfs_enable)
		hisi_sas_debugfs_dir = debugfs_create_dir("hisi_sas", NULL);

3037 3038 3039 3040 3041 3042
	return 0;
}

static __exit void hisi_sas_exit(void)
{
	sas_release_transport(hisi_sas_stt);
3043 3044

	debugfs_remove(hisi_sas_debugfs_dir);
3045 3046 3047 3048 3049 3050 3051 3052 3053
}

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);