Release 4.7 drivers/scsi/hisi_sas/hisi_sas_main.c

Directory: drivers/scsi/hisi_sas
/*
 * 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"


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

static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
				u8 *lun, struct hisi_sas_tmf_task *tmf);



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

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 22 100.00% 1 100.00%
Total 22 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 29 100.00% 2 100.00%
Total 29 100.00% 2 100.00%



static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
{
	hisi_sas_slot_index_clear(hisi_hba, slot_idx);
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 29 100.00% 1 100.00%
Total 29 100.00% 1 100.00%



static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
{
	unsigned int index;
	void *bitmap = hisi_hba->slot_index_tags;

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

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 65 100.00% 1 100.00%
Total 65 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 36 100.00% 1 100.00%
Total 36 100.00% 1 100.00%



void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
			     struct hisi_sas_slot *slot)
{
	struct device *dev = &hisi_hba->pdev->dev;

	if (!slot->task)
		return;

	if (!sas_protocol_ata(task->task_proto))
		if (slot->n_elem)
			dma_unmap_sg(dev, task->scatter, slot->n_elem,
				     task->data_dir);

	if (slot->command_table)
		dma_pool_free(hisi_hba->command_table_pool,
			      slot->command_table, slot->command_table_dma);

	if (slot->status_buffer)
		dma_pool_free(hisi_hba->status_buffer_pool,
			      slot->status_buffer, slot->status_buffer_dma);

	if (slot->sge_page)
		dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
			      slot->sge_page_dma);

	list_del_init(&slot->entry);
	task->lldd_task = NULL;
	slot->task = NULL;
	slot->port = NULL;
	hisi_sas_slot_index_free(hisi_hba, slot->idx);
	memset(slot, 0, sizeof(*slot));
}
Contributors
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john garry john garry 184 100.00% 1 100.00%
Total 184 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);



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

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



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

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 40 100.00% 1 100.00%
Total 40 100.00% 1 100.00%



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

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%

/*
 * This function will issue an abort TMF regardless of whether the
 * task is in the sdev or not. Then it will do the task complete
 * cleanup and callbacks.
 */


static void hisi_sas_slot_abort(struct work_struct *work)
{
	struct hisi_sas_slot *abort_slot =
		container_of(work, struct hisi_sas_slot, abort_slot);
	struct sas_task *task = abort_slot->task;
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
	struct scsi_cmnd *cmnd = task->uldd_task;
	struct hisi_sas_tmf_task tmf_task;
	struct domain_device *device = task->dev;
	struct hisi_sas_device *sas_dev = device->lldd_dev;
	struct scsi_lun lun;
	struct device *dev = &hisi_hba->pdev->dev;
	int tag = abort_slot->idx;

	if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
		dev_err(dev, "cannot abort slot for non-ssp task\n");
		goto out;
	}

	int_to_scsilun(cmnd->device->lun, &lun);
	tmf_task.tmf = TMF_ABORT_TASK;
	tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);

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

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 203 100.00% 1 100.00%
Total 203 100.00% 1 100.00%



static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
			      int is_tmf, struct hisi_sas_tmf_task *tmf,
			      int *pass)
{
	struct domain_device *device = task->dev;
	struct hisi_sas_device *sas_dev = device->lldd_dev;
	struct hisi_sas_port *port;
	struct hisi_sas_slot *slot;
	struct hisi_sas_cmd_hdr	*cmd_hdr_base;
	struct device *dev = &hisi_hba->pdev->dev;
	int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;

	if (!device->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 0;
	}

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

		rc = SAS_PHY_DOWN;
		return rc;
	}
	port = device->port->lldd_port;
	if (port && !port->port_attached && !tmf) {
		if (sas_protocol_ata(task->task_proto)) {
			struct task_status_struct *ts = &task->task_status;

			dev_info(dev,
				 "task prep: SATA/STP port%d not attach device\n",
				 device->port->id);
			ts->resp = SAS_TASK_COMPLETE;
			ts->stat = SAS_PHY_DOWN;
			task->task_done(task);
		} else {
			struct task_status_struct *ts = &task->task_status;

			dev_info(dev,
				 "task prep: SAS port%d does not attach device\n",
				 device->port->id);
			ts->resp = SAS_TASK_UNDELIVERED;
			ts->stat = SAS_PHY_DOWN;
			task->task_done(task);
		}
		return 0;
	}

	if (!sas_protocol_ata(task->task_proto)) {
		if (task->num_scatter) {
			n_elem = dma_map_sg(dev, task->scatter,
					    task->num_scatter, task->data_dir);
			if (!n_elem) {
				rc = -ENOMEM;
				goto prep_out;
			}
		}
	} else
		n_elem = task->num_scatter;

	if (hisi_hba->hw->slot_index_alloc)
		rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
						    device);
	else
		rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
	if (rc)
		goto err_out;
	rc = hisi_hba->hw->get_free_slot(hisi_hba, &dlvry_queue,
					 &dlvry_queue_slot);
	if (rc)
		goto err_out_tag;

	slot = &hisi_hba->slot_info[slot_idx];
	memset(slot, 0, sizeof(struct hisi_sas_slot));

	slot->idx = slot_idx;
	slot->n_elem = n_elem;
	slot->dlvry_queue = dlvry_queue;
	slot->dlvry_queue_slot = dlvry_queue_slot;
	cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
	slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
	slot->task = task;
	slot->port = port;
	task->lldd_task = slot;
	INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);

	slot->status_buffer = dma_pool_alloc(hisi_hba->status_buffer_pool,
					     GFP_ATOMIC,
					     &slot->status_buffer_dma);
	if (!slot->status_buffer) {
		rc = -ENOMEM;
		goto err_out_slot_buf;
	}
	memset(slot->status_buffer, 0, HISI_SAS_STATUS_BUF_SZ);

	slot->command_table = dma_pool_alloc(hisi_hba->command_table_pool,
					     GFP_ATOMIC,
					     &slot->command_table_dma);
	if (!slot->command_table) {
		rc = -ENOMEM;
		goto err_out_status_buf;
	}
	memset(slot->command_table, 0, HISI_SAS_COMMAND_TABLE_SZ);
	memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));

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

	if (rc) {
		dev_err(dev, "task prep: rc = 0x%x\n", rc);
		if (slot->sge_page)
			goto err_out_sge;
		goto err_out_command_table;
	}

	list_add_tail(&slot->entry, &port->list);
	spin_lock(&task->task_state_lock);
	task->task_state_flags |= SAS_TASK_AT_INITIATOR;
	spin_unlock(&task->task_state_lock);

	hisi_hba->slot_prep = slot;

	sas_dev->running_req++;
	++(*pass);

	return 0;

err_out_sge:
	dma_pool_free(hisi_hba->sge_page_pool, slot->sge_page,
		slot->sge_page_dma);
err_out_command_table:
	dma_pool_free(hisi_hba->command_table_pool, slot->command_table,
		slot->command_table_dma);
err_out_status_buf:
	dma_pool_free(hisi_hba->status_buffer_pool, slot->status_buffer,
		slot->status_buffer_dma);
err_out_slot_buf:
	/* Nothing to be done */
err_out_tag:
	hisi_sas_slot_index_free(hisi_hba, slot_idx);
err_out:
	dev_err(dev, "task prep: failed[%d]!\n", rc);
	if (!sas_protocol_ata(task->task_proto))
		if (n_elem)
			dma_unmap_sg(dev, task->scatter, n_elem,
				     task->data_dir);
prep_out:
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 885 98.33% 6 85.71%
dan carpenter dan carpenter 15 1.67% 1 14.29%
Total 900 100.00% 7 100.00%



static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
			      int is_tmf, struct hisi_sas_tmf_task *tmf)
{
	u32 rc;
	u32 pass = 0;
	unsigned long flags;
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
	struct device *dev = &hisi_hba->pdev->dev;

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

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

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 127 100.00% 2 100.00%
Total 127 100.00% 2 100.00%



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 = phy->minimum_linkrate;
		sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
		sphy->maximum_linkrate = phy->maximum_linkrate;
	}

	if (phy->phy_type & PORT_TYPE_SAS) {
		struct sas_identify_frame *id;

		id = (struct sas_identify_frame *)phy->frame_rcvd;
		id->dev_type = phy->identify.device_type;
		id->initiator_bits = SAS_PROTOCOL_ALL;
		id->target_bits = phy->identify.target_port_protocols;
	} else if (phy->phy_type & PORT_TYPE_SATA) {
		/*Nothing*/
	}

	sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
	sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 194 100.00% 1 100.00%
Total 194 100.00% 1 100.00%



static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
{
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
	struct hisi_sas_device *sas_dev = NULL;
	int i;

	spin_lock(&hisi_hba->lock);
	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
		if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
			hisi_hba->devices[i].device_id = i;
			sas_dev = &hisi_hba->devices[i];
			sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
			sas_dev->dev_type = device->dev_type;
			sas_dev->hisi_hba = hisi_hba;
			sas_dev->sas_device = device;
			break;
		}
	}
	spin_unlock(&hisi_hba->lock);

	return sas_dev;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 130 100.00% 1 100.00%
Total 130 100.00% 1 100.00%



static int hisi_sas_dev_found(struct domain_device *device)
{
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
	struct domain_device *parent_dev = device->parent;
	struct hisi_sas_device *sas_dev;
	struct device *dev = &hisi_hba->pdev->dev;

	if (hisi_hba->hw->alloc_dev)
		sas_dev = hisi_hba->hw->alloc_dev(device);
	else
		sas_dev = hisi_sas_alloc_dev(device);
	if (!sas_dev) {
		dev_err(dev, "fail alloc dev: max support %d devices\n",
			HISI_SAS_MAX_DEVICES);
		return -EINVAL;
	}

	device->lldd_dev = sas_dev;
	hisi_hba->hw->setup_itct(hisi_hba, sas_dev);

	if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
		int phy_no;
		u8 phy_num = parent_dev->ex_dev.num_phys;
		struct ex_phy *phy;

		for (phy_no = 0; phy_no < phy_num; phy_no++) {
			phy = &parent_dev->ex_dev.ex_phy[phy_no];
			if (SAS_ADDR(phy->attached_sas_addr) ==
				SAS_ADDR(device->sas_addr)) {
				sas_dev->attached_phy = phy_no;
				break;
			}
		}

		if (phy_no == phy_num) {
			dev_info(dev, "dev found: no attached "
				 "dev:%016llx at ex:%016llx\n",
				 SAS_ADDR(device->sas_addr),
				 SAS_ADDR(parent_dev->sas_addr));
			return -EINVAL;
		}
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 230 100.00% 2 100.00%
Total 230 100.00% 2 100.00%



static int hisi_sas_slave_configure(struct scsi_device *sdev)
{
	struct domain_device *dev = sdev_to_domain_dev(sdev);
	int ret = sas_slave_configure(sdev);

	if (ret)
		return ret;
	if (!dev_is_sata(dev))
		sas_change_queue_depth(sdev, 64);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 54 100.00% 1 100.00%
Total 54 100.00% 1 100.00%



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

	for (i = 0; i < hisi_hba->n_phy; ++i)
		hisi_sas_bytes_dmaed(hisi_hba, i);

	hisi_hba->scan_finished = 1;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 52 100.00% 1 100.00%
Total 52 100.00% 1 100.00%



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

	if (hisi_hba->scan_finished == 0)
		return 0;

	sas_drain_work(sha);
	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 54 100.00% 1 100.00%
Total 54 100.00% 1 100.00%



static void hisi_sas_phyup_work(struct work_struct *work)
{
	struct hisi_sas_phy *phy =
		container_of(work, struct hisi_sas_phy, phyup_ws);
	struct hisi_hba *hisi_hba = phy->hisi_hba;
	struct asd_sas_phy *sas_phy = &phy->sas_phy;
	int phy_no = sas_phy->id;

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

Contributors
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john garry john garry 71 100.00% 1 100.00%
Total 71 100.00% 1 100.00%



static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
{
	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
	struct asd_sas_phy *sas_phy = &phy->sas_phy;

	phy->hisi_hba = hisi_hba;
	phy->port = NULL;
	init_timer(&phy->timer);
	sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
	sas_phy->class = SAS;
	sas_phy->iproto = SAS_PROTOCOL_ALL;
	sas_phy->tproto = 0;
	sas_phy->type = PHY_TYPE_PHYSICAL;
	sas_phy->role = PHY_ROLE_INITIATOR;
	sas_phy->oob_mode = OOB_NOT_CONNECTED;
	sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
	sas_phy->id = phy_no;
	sas_phy->sas_addr = &hisi_hba->sas_addr[0];
	sas_phy->frame_rcvd = &phy->frame_rcvd[0];
	sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
	sas_phy->lldd_phy = phy;

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

Contributors
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john garry john garry 176 100.00% 2 100.00%
Total 176 100.00% 2 100.00%



static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
{
	struct sas_ha_struct *sas_ha = sas_phy->ha;
	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
	struct hisi_sas_phy *phy = sas_phy->lldd_phy;
	struct asd_sas_port *sas_port = sas_phy->port;
	struct hisi_sas_port *port = &hisi_hba->port[sas_phy->id];
	unsigned long flags;

	if (!sas_port)
		return;

	spin_lock_irqsave(&hisi_hba->lock, flags);
	port->port_attached = 1;
	port->id = phy->port_id;
	phy->port = port;
	sas_port->lldd_port = port;
	spin_unlock_irqrestore(&hisi_hba->lock, flags);
}

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john garry john garry 118 100.00% 1 100.00%
Total 118 100.00% 1 100.00%



static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, int phy_no,
				     struct domain_device *device)
{
	struct hisi_sas_phy *phy;
	struct hisi_sas_port *port;
	struct hisi_sas_slot *slot, *slot2;
	struct device *dev = &hisi_hba->pdev->dev;

	phy = &hisi_hba->phy[phy_no];
	port = phy->port;
	if (!port)
		return;

	list_for_each_entry_safe(slot, slot2, &port->list, entry) {
		struct sas_task *task;

		task = slot->task;
		if (device && task->dev != device)
			continue;

		dev_info(dev, "Release slot [%d:%d], task [%p]:\n",
			 slot->dlvry_queue, slot->dlvry_queue_slot, task);
		hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
	}
}

Contributors
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john garry john garry 135 100.00% 1 100.00%
Total 135 100.00% 1 100.00%



static void hisi_sas_port_notify_deformed(struct asd_sas_phy *sas_phy)
{
	struct domain_device *device;
	struct hisi_sas_phy *phy = sas_phy->lldd_phy;
	struct asd_sas_port *sas_port = sas_phy->port;

	list_for_each_entry(device, &sas_port->dev_list, dev_list_node)
		hisi_sas_do_release_task(phy->hisi_hba, sas_phy->id, device);
}

Contributors
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john garry john garry 55 100.00% 1 100.00%
Total 55 100.00% 1 100.00%



static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
			struct domain_device *device)
{
	struct asd_sas_port *port = device->port;
	struct asd_sas_phy *sas_phy;

	list_for_each_entry(sas_phy, &port->phy_list, port_phy_el)
		hisi_sas_do_release_task(hisi_hba, sas_phy->id, device);
}

Contributors
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john garry john garry 49 100.00% 1 100.00%
Total 49 100.00% 1 100.00%



static void hisi_sas_dev_gone(struct domain_device *device)
{
	struct hisi_sas_device *sas_dev = device->lldd_dev;
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
	struct device *dev = &hisi_hba->pdev->dev;
	u64 dev_id = sas_dev->device_id;

	dev_info(dev, "found dev[%lld:%x] is gone\n",
		 sas_dev->device_id, sas_dev->dev_type);

	hisi_hba->hw->free_device(hisi_hba, sas_dev);
	device->lldd_dev = NULL;
	memset(sas_dev, 0, sizeof(*sas_dev));
	sas_dev->device_id = dev_id;
	sas_dev->dev_type = SAS_PHY_UNUSED;
	sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
}

Contributors
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john garry john garry 112 100.00% 1 100.00%
Total 112 100.00% 1 100.00%



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

Contributors
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john garry john garry 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
				void *funcdata)
{
	struct sas_ha_struct *sas_ha = sas_phy->ha;
	struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
	int phy_no = sas_phy->id;

	switch (func) {
	case PHY_FUNC_HARD_RESET:
		hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
		break;

	case PHY_FUNC_LINK_RESET:
		hisi_hba->hw->phy_enable(hisi_hba, phy_no);
		hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
		break;

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

	case PHY_FUNC_SET_LINK_RATE:
	case PHY_FUNC_RELEASE_SPINUP_HOLD:
	default:
		return -EOPNOTSUPP;
	}
	return 0;
}

Contributors
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john garry john garry 120 100.00% 1 100.00%
Total 120 100.00% 1 100.00%



static void hisi_sas_task_done(struct sas_task *task)
{
	if (!del_timer(&task->slow_task->timer))
		return;
	complete(&task->slow_task->completion);
}

Contributors
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john garry john garry 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%



static void hisi_sas_tmf_timedout(unsigned long data)
{
	struct sas_task *task = (struct sas_task *)data;

	task->task_state_flags |= SAS_TASK_STATE_ABORTED;
	complete(&task->slow_task->completion);
}

Contributors
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john garry john garry 38 100.00% 1 100.00%
Total 38 100.00% 1 100.00%


#define TASK_TIMEOUT 20

#define TASK_RETRY 3


static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
					   void *parameter, u32 para_len,
					   struct hisi_sas_tmf_task *tmf)
{
	struct hisi_sas_device *sas_dev = device->lldd_dev;
	struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
	struct device *dev = &hisi_hba->pdev->dev;
	struct sas_task *task;
	int res, retry;

	for (retry = 0; retry < TASK_RETRY; retry++) {
		task = sas_alloc_slow_task(GFP_KERNEL);
		if (!task)
			return -ENOMEM;

		task->dev = device;
		task->task_proto = device->tproto;

		memcpy(&task->ssp_task, parameter, para_len);
		task->task_done = hisi_sas_task_done;

		task->slow_task->timer.data = (unsigned long) task;
		task->slow_task->timer.function = hisi_sas_tmf_timedout;
		task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
		add_timer(&task->slow_task->timer);

		res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);

		if (res) {
			del_timer(&task->slow_task->timer);
			dev_err(dev, "abort tmf: executing internal task failed: %d\n",
				res);
			goto ex_err;
		}

		wait_for_completion(&task->slow_task->completion);
		res = TMF_RESP_FUNC_FAILED;
		/* Even TMF timed out, return direct. */
		if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
			if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
				dev_err(dev, "abort tmf: TMF task[%d] timeout\n",
					tmf->tag_of_task_to_be_managed);
				if (task->lldd_task) {
					struct hisi_sas_slot *slot =
						task->lldd_task;

					hisi_sas_slot_task_free(hisi_hba,
								task, slot);
				}

				goto ex_err;
			}
		}

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

		if (task->task_status.resp == SAS_TASK_COMPLETE &&
		      task->task_status.stat == 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:
	WARN_ON(retry == TASK_RETRY);
	sas_free_task(task);
	return res;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 463 100.00% 2 100.00%
Total 463 100.00% 2 100.00%



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);
}

Contributors
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john garry john garry 65 100.00% 1 100.00%
Total 65 100.00% 1 100.00%



static int hisi_sas_abort_task(struct sas_task *task)
{
	struct scsi_lun lun;
	struct hisi_sas_tmf_task tmf_task;
	struct domain_device *device = task->dev;
	struct hisi_sas_device *sas_dev = device->lldd_dev;
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
	struct device *dev = &hisi_hba->pdev->dev;
	int rc = TMF_RESP_FUNC_FAILED;
	unsigned long flags;

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

	spin_lock_irqsave(&task->task_state_lock, flags);
	if (task->task_state_flags & SAS_TASK_STATE_DONE) {
		spin_unlock_irqrestore(&task->task_state_lock, flags);
		rc = TMF_RESP_FUNC_COMPLETE;
		goto out;
	}

	spin_unlock_irqrestore(&task->task_state_lock, flags);
	sas_dev->dev_status = HISI_SAS_DEV_EH;
	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
		struct scsi_cmnd *cmnd = task->uldd_task;
		struct hisi_sas_slot *slot = task->lldd_task;
		u32 tag = slot->idx;

		int_to_scsilun(cmnd->device->lun, &lun);
		tmf_task.tmf = TMF_ABORT_TASK;
		tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);

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

		/* if successful, clear the task and callback forwards.*/
		if (rc == TMF_RESP_FUNC_COMPLETE) {
			if (task->lldd_task) {
				struct hisi_sas_slot *slot;

				slot = &hisi_hba->slot_info
					[tmf_task.tag_of_task_to_be_managed];
				spin_lock_irqsave(&hisi_hba->lock, flags);
				hisi_hba->hw->slot_complete(hisi_hba, slot, 1);
				spin_unlock_irqrestore(&hisi_hba->lock, flags);
			}
		}

	} else if (task->task_proto & SAS_PROTOCOL_SATA ||
		task->task_proto & SAS_PROTOCOL_STP) {
		if (task->dev->dev_type == SAS_SATA_DEV) {
			struct hisi_slot_info *slot = task->lldd_task;

			dev_notice(dev, "abort task: hba=%p task=%p slot=%p\n",
				   hisi_hba, task, slot);
			task->task_state_flags |= SAS_TASK_STATE_ABORTED;
			rc = TMF_RESP_FUNC_COMPLETE;
			goto out;
		}

	}

out:
	if (rc != TMF_RESP_FUNC_COMPLETE)
		dev_notice(dev, "abort task: rc=%d\n", rc);
	return rc;
}

Contributors
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john garry john garry 373 100.00% 1 100.00%
Total 373 100.00% 1 100.00%



static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
{
	struct hisi_sas_tmf_task tmf_task;
	int rc = TMF_RESP_FUNC_FAILED;

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

	return rc;
}

Contributors
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john garry john garry 45 100.00% 1 100.00%
Total 45 100.00% 1 100.00%



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;
}

Contributors
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john garry john garry 45 100.00% 1 100.00%
Total 45 100.00% 1 100.00%



static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
{
	struct sas_phy *phy = sas_get_local_phy(device);
	int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
			(device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
	rc = sas_phy_reset(phy, reset_type);
	sas_put_local_phy(phy);
	msleep(2000);
	return rc;
}

Contributors
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john garry john garry 68 100.00% 1 100.00%
Total 68 100.00% 1 100.00%



static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
{
	struct hisi_sas_device *sas_dev = device->lldd_dev;
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
	unsigned long flags;
	int rc = TMF_RESP_FUNC_FAILED;

	if (sas_dev->dev_status != HISI_SAS_DEV_EH)
		return TMF_RESP_FUNC_FAILED;
	sas_dev->dev_status = HISI_SAS_DEV_NORMAL;

	rc = hisi_sas_debug_I_T_nexus_reset(device);

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

	return 0;
}

Contributors
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john garry john garry 93 100.00% 1 100.00%
Total 93 100.00% 1 100.00%



static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
{
	struct hisi_sas_tmf_task tmf_task;
	struct hisi_sas_device *sas_dev = device->lldd_dev;
	struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
	struct device *dev = &hisi_hba->pdev->dev;
	unsigned long flags;
	int rc = TMF_RESP_FUNC_FAILED;

	tmf_task.tmf = TMF_LU_RESET;
	sas_dev->dev_status = HISI_SAS_DEV_EH;
	rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
	if (rc == TMF_RESP_FUNC_COMPLETE) {
		spin_lock_irqsave(&hisi_hba->lock, flags);
		hisi_sas_release_task(hisi_hba, device);
		spin_unlock_irqrestore(&hisi_hba->lock, flags);
	}

	/* If failed, fall-through I_T_Nexus reset */
	dev_err(dev, "lu_reset: for device[%llx]:rc= %d\n",
		sas_dev->device_id, rc);
	return rc;
}

Contributors
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john garry john garry 135 100.00% 1 100.00%
Total 135 100.00% 1 100.00%



static int hisi_sas_query_task(struct sas_task *task)
{
	struct scsi_lun lun;
	struct hisi_sas_tmf_task tmf_task;
	int rc = TMF_RESP_FUNC_FAILED;

	if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
		struct scsi_cmnd *cmnd = task->uldd_task;
		struct domain_device *device = task->dev;
		struct hisi_sas_slot *slot = task->lldd_task;
		u32 tag = slot->idx;

		int_to_scsilun(cmnd->device->lun, &lun);
		tmf_task.tmf = TMF_QUERY_TASK;
		tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);

		rc = hisi_sas_debug_issue_ssp_tmf(device,
						  lun.scsi_lun,
						  &tmf_task);
		switch (rc) {
		/* The task is still in Lun, release it then */
		case TMF_RESP_FUNC_SUCC:
		/* The task is not in Lun or failed, reset the phy */
		case TMF_RESP_FUNC_FAILED:
		case TMF_RESP_FUNC_COMPLETE:
			break;
		}
	}
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 134 100.00% 1 100.00%
Total 134 100.00% 1 100.00%



static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
{
	hisi_sas_port_notify_formed(sas_phy);
}

Contributors
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john garry john garry 16 100.00% 1 100.00%
Total 16 100.00% 1 100.00%



static void hisi_sas_port_deformed(struct asd_sas_phy *sas_phy)
{
	hisi_sas_port_notify_deformed(sas_phy);
}

Contributors
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john garry john garry 16 100.00% 1 100.00%
Total 16 100.00% 1 100.00%



static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
{
	phy->phy_attached = 0;
	phy->phy_type = 0;
	phy->port = NULL;
}

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john garry john garry 29 100.00% 1 100.00%
Total 29 100.00% 1 100.00%



void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
{
	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
	struct asd_sas_phy *sas_phy = &phy->sas_phy;
	struct sas_ha_struct *sas_ha = &hisi_hba->sha;

	if (rdy) {
		/* Phy down but ready */
		hisi_sas_bytes_dmaed(hisi_hba, phy_no);
		hisi_sas_port_notify_formed(sas_phy);
	} else {
		struct hisi_sas_port *port  = phy->port;

		/* Phy down and not ready */
		sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
		sas_phy_disconnected(sas_phy);

		if (port) {
			if (phy->phy_type & PORT_TYPE_SAS) {
				int port_id = port->id;

				if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
								       port_id))
					port->port_attached = 0;
			} else if (phy->phy_type & PORT_TYPE_SATA)
				port->port_attached = 0;
		}
		hisi_sas_phy_disconnected(phy);
	}
}
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john garry john garry 158 100.00% 1 100.00%
Total 158 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(hisi_sas_phy_down);


static struct scsi_transport_template *hisi_sas_stt;


static struct scsi_host_template hisi_sas_sht = {
	.module			= THIS_MODULE,
	.name			= DRV_NAME,
	.queuecommand		= sas_queuecommand,
	.target_alloc		= sas_target_alloc,
	.slave_configure	= hisi_sas_slave_configure,
	.scan_finished		= hisi_sas_scan_finished,
	.scan_start		= hisi_sas_scan_start,
	.change_queue_depth	= sas_change_queue_depth,
	.bios_param		= sas_bios_param,
	.can_queue		= 1,
	.this_id		= -1,
	.sg_tablesize		= SG_ALL,
	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,
	.use_clustering		= ENABLE_CLUSTERING,
	.eh_device_reset_handler = sas_eh_device_reset_handler,
	.eh_bus_reset_handler	= sas_eh_bus_reset_handler,
	.target_destroy		= sas_target_destroy,
	.ioctl			= sas_ioctl,
};


static struct sas_domain_function_template hisi_sas_transport_ops = {
	.lldd_dev_found		= hisi_sas_dev_found,
	.lldd_dev_gone		= hisi_sas_dev_gone,
	.lldd_execute_task	= hisi_sas_queue_command,
	.lldd_control_phy	= hisi_sas_control_phy,
	.lldd_abort_task	= hisi_sas_abort_task,
	.lldd_abort_task_set	= hisi_sas_abort_task_set,
	.lldd_clear_aca		= hisi_sas_clear_aca,
	.lldd_I_T_nexus_reset	= hisi_sas_I_T_nexus_reset,
	.lldd_lu_reset		= hisi_sas_lu_reset,
	.lldd_query_task	= hisi_sas_query_task,
	.lldd_port_formed	= hisi_sas_port_formed,
	.lldd_port_deformed	= hisi_sas_port_deformed,
};



static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
{
	struct platform_device *pdev = hisi_hba->pdev;
	struct device *dev = &pdev->dev;
	int i, s, max_command_entries = hisi_hba->hw->max_command_entries;

	spin_lock_init(&hisi_hba->lock);
	for (i = 0; i < hisi_hba->n_phy; i++) {
		hisi_sas_phy_init(hisi_hba, i);
		hisi_hba->port[i].port_attached = 0;
		hisi_hba->port[i].id = -1;
		INIT_LIST_HEAD(&hisi_hba->port[i].list);
	}

	for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
		hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
		hisi_hba->devices[i].device_id = i;
		hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
	}

	for (i = 0; i < hisi_hba->queue_count; i++) {
		struct hisi_sas_cq *cq = &hisi_hba->cq[i];

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

		/* Delivery queue */
		s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
		hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
					&hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
		if (!hisi_hba->cmd_hdr[i])
			goto err_out;
		memset(hisi_hba->cmd_hdr[i], 0, s);

		/* Completion queue */
		s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
		hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
				&hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
		if (!hisi_hba->complete_hdr[i])
			goto err_out;
		memset(hisi_hba->complete_hdr[i], 0, s);
	}

	s = HISI_SAS_STATUS_BUF_SZ;
	hisi_hba->status_buffer_pool = dma_pool_create("status_buffer",
						       dev, s, 16, 0);
	if (!hisi_hba->status_buffer_pool)
		goto err_out;

	s = HISI_SAS_COMMAND_TABLE_SZ;
	hisi_hba->command_table_pool = dma_pool_create("command_table",
						       dev, s, 16, 0);
	if (!hisi_hba->command_table_pool)
		goto err_out;

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

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

	hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
					   sizeof(struct hisi_sas_slot),
					   GFP_KERNEL);
	if (!hisi_hba->slot_info)
		goto err_out;

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

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

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

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

	hisi_hba->slot_index_count = max_command_entries;
	s = hisi_hba->slot_index_count / sizeof(unsigned long);
	hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
	if (!hisi_hba->slot_index_tags)
		goto err_out;

	hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
				sizeof(struct hisi_sas_sge_page), 16, 0);
	if (!hisi_hba->sge_page_pool)
		goto err_out;

	s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
	hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
				&hisi_hba->initial_fis_dma, GFP_KERNEL);
	if (!hisi_hba->initial_fis)
		goto err_out;
	memset(hisi_hba->initial_fis, 0, s);

	s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
	hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
				&hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
	if (!hisi_hba->sata_breakpoint)
		goto err_out;
	memset(hisi_hba->sata_breakpoint, 0, s);

	hisi_sas_slot_index_init(hisi_hba);

	hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
	if (!hisi_hba->wq) {
		dev_err(dev, "sas_alloc: failed to create workqueue\n");
		goto err_out;
	}

	return 0;
err_out:
	return -ENOMEM;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 786 100.00% 8 100.00%
Total 786 100.00% 8 100.00%



static void hisi_sas_free(struct hisi_hba *hisi_hba)
{
	struct device *dev = &hisi_hba->pdev->dev;
	int i, s, max_command_entries = hisi_hba->hw->max_command_entries;

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

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

	dma_pool_destroy(hisi_hba->status_buffer_pool);
	dma_pool_destroy(hisi_hba->command_table_pool);
	dma_pool_destroy(hisi_hba->sge_page_pool);

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

	s = max_command_entries * sizeof(struct hisi_sas_iost);
	if (hisi_hba->iost)
		dma_free_coherent(dev, s,
				  hisi_hba->iost, hisi_hba->iost_dma);

	s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
	if (hisi_hba->breakpoint)
		dma_free_coherent(dev, s,
				  hisi_hba->breakpoint,
				  hisi_hba->breakpoint_dma);


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

	s = max_command_entries * sizeof(struct hisi_sas_breakpoint) * 2;
	if (hisi_hba->sata_breakpoint)
		dma_free_coherent(dev, s,
				  hisi_hba->sata_breakpoint,
				  hisi_hba->sata_breakpoint_dma);

	if (hisi_hba->wq)
		destroy_workqueue(hisi_hba->wq);
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 324 100.00% 3 100.00%
Total 324 100.00% 3 100.00%



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;
	struct device_node *np = pdev->dev.of_node;

	shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
	if (!shost)
		goto err_out;
	hisi_hba = shost_priv(shost);

	hisi_hba->hw = hw;
	hisi_hba->pdev = pdev;
	hisi_hba->shost = shost;
	SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;

	init_timer(&hisi_hba->timer);

	if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
					  SAS_ADDR_SIZE))
		goto err_out;

	if (np) {
		hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
					"hisilicon,sas-syscon");
		if (IS_ERR(hisi_hba->ctrl))
			goto err_out;

		if (device_property_read_u32(dev, "ctrl-reset-reg",
					     &hisi_hba->ctrl_reset_reg))
			goto err_out;

		if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
					     &hisi_hba->ctrl_reset_sts_reg))
			goto err_out;

		if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
					     &hisi_hba->ctrl_clock_ena_reg))
			goto err_out;
	}

	if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
		goto err_out;

	if (device_property_read_u32(dev, "queue-count",
				     &hisi_hba->queue_count))
		goto err_out;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	hisi_hba->regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(hisi_hba->regs))
		goto err_out;

	if (hisi_sas_alloc(hisi_hba, shost)) {
		hisi_sas_free(hisi_hba);
		goto err_out;
	}

	return shost;
err_out:
	dev_err(dev, "shost alloc failed\n");
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 320 100.00% 6 100.00%
Total 320 100.00% 6 100.00%



static void hisi_sas_init_add(struct hisi_hba *hisi_hba)
{
	int i;

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

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 48 100.00% 1 100.00%
Total 48 100.00% 1 100.00%



int hisi_sas_probe(struct platform_device *pdev,
			 const struct hisi_sas_hw *hw)
{
	struct Scsi_Host *shost;
	struct hisi_hba *hisi_hba;
	struct device *dev = &pdev->dev;
	struct asd_sas_phy **arr_phy;
	struct asd_sas_port **arr_port;
	struct sas_ha_struct *sha;
	int rc, phy_nr, port_nr, i;

	shost = hisi_sas_shost_alloc(pdev, hw);
	if (!shost) {
		rc = -ENOMEM;
		goto err_out_ha;
	}

	sha = SHOST_TO_SAS_HA(shost);
	hisi_hba = shost_priv(shost);
	platform_set_drvdata(pdev, sha);

	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");
		rc = -EIO;
		goto err_out_ha;
	}

	phy_nr = port_nr = hisi_hba->n_phy;

	arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
	arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
	if (!arr_phy || !arr_port)
		return -ENOMEM;

	sha->sas_phy = arr_phy;
	sha->sas_port = arr_port;
	sha->core.shost = shost;
	sha->lldd_ha = hisi_hba;

	shost->transportt = hisi_sas_stt;
	shost->max_id = HISI_SAS_MAX_DEVICES;
	shost->max_lun = ~0;
	shost->max_channel = 1;
	shost->max_cmd_len = 16;
	shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
	shost->can_queue = hisi_hba->hw->max_command_entries;
	shost->cmd_per_lun = hisi_hba->hw->max_command_entries;

	sha->sas_ha_name = DRV_NAME;
	sha->dev = &hisi_hba->pdev->dev;
	sha->lldd_module = THIS_MODULE;
	sha->sas_addr = &hisi_hba->sas_addr[0];
	sha->num_phys = hisi_hba->n_phy;
	sha->core.shost = hisi_hba->shost;

	for (i = 0; i < hisi_hba->n_phy; i++) {
		sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
		sha->sas_port[i] = &hisi_hba->port[i].sas_port;
	}

	hisi_sas_init_add(hisi_hba);

	rc = hisi_hba->hw->hw_init(hisi_hba);
	if (rc)
		goto err_out_ha;

	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;

	scsi_scan_host(shost);

	return 0;

err_out_register_ha:
	scsi_remove_host(shost);
err_out_ha:
	kfree(shost);
	return rc;
}
Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 475 100.00% 5 100.00%
Total 475 100.00% 5 100.00%


EXPORT_SYMBOL_GPL(hisi_sas_probe);



int hisi_sas_remove(struct platform_device *pdev)
{
	struct sas_ha_struct *sha = platform_get_drvdata(pdev);
	struct hisi_hba *hisi_hba = sha->lldd_ha;

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

	hisi_sas_free(hisi_hba);
	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 60 100.00% 1 100.00%
Total 60 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(hisi_sas_remove);



static __init int hisi_sas_init(void)
{
	pr_info("hisi_sas: driver version %s\n", DRV_VERSION);

	hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
	if (!hisi_sas_stt)
		return -ENOMEM;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 36 100.00% 1 100.00%
Total 36 100.00% 1 100.00%



static __exit void hisi_sas_exit(void)
{
	sas_release_transport(hisi_sas_stt);
}

Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 14 100.00% 1 100.00%
Total 14 100.00% 1 100.00%


module_init(hisi_sas_init);

module_exit(hisi_sas_exit);


MODULE_VERSION(DRV_VERSION);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
MODULE_DESCRIPTION("HISILICON SAS controller driver");
MODULE_ALIAS("platform:" DRV_NAME);
Overall Contributors
Person Tokens Prop Commits CommitProp
john garry john garry 7320 99.80% 30 96.77%
dan carpenter dan carpenter 15 0.20% 1 3.23%
Total 7335 100.00% 31 100.00%
  Directory: drivers/scsi/hisi_sas

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
john garry	john garry	22	100.00%	1	100.00%
	Total	22	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/scsi/hisi_sas/hisi_sas_main.c

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