Release 4.7 drivers/scsi/aic94xx/aic94xx_dev.c

Directory: drivers/scsi/aic94xx
/*
 * Aic94xx SAS/SATA DDB management
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 *
 * This file is licensed under GPLv2.
 *
 * This file is part of the aic94xx driver.
 *
 * The aic94xx driver 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; version 2 of the
 * License.
 *
 * The aic94xx driver is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the aic94xx driver; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * $Id: //depot/aic94xx/aic94xx_dev.c#21 $
 */

#include "aic94xx.h"
#include "aic94xx_hwi.h"
#include "aic94xx_reg.h"
#include "aic94xx_sas.h"


#define FIND_FREE_DDB(_ha) find_first_zero_bit((_ha)->hw_prof.ddb_bitmap, \
                                               (_ha)->hw_prof.max_ddbs)

#define SET_DDB(_ddb, _ha) set_bit(_ddb, (_ha)->hw_prof.ddb_bitmap)

#define CLEAR_DDB(_ddb, _ha) clear_bit(_ddb, (_ha)->hw_prof.ddb_bitmap)



static int asd_get_ddb(struct asd_ha_struct *asd_ha)
{
	int ddb, i;

	ddb = FIND_FREE_DDB(asd_ha);
	if (ddb >= asd_ha->hw_prof.max_ddbs) {
		ddb = -ENOMEM;
		goto out;
	}
	SET_DDB(ddb, asd_ha);

	for (i = 0; i < sizeof(struct asd_ddb_ssp_smp_target_port); i+= 4)
		asd_ddbsite_write_dword(asd_ha, ddb, i, 0);
out:
	return ddb;
}

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#define INIT_CONN_TAG   offsetof(struct asd_ddb_ssp_smp_target_port, init_conn_tag)

#define DEST_SAS_ADDR   offsetof(struct asd_ddb_ssp_smp_target_port, dest_sas_addr)

#define SEND_QUEUE_HEAD offsetof(struct asd_ddb_ssp_smp_target_port, send_queue_head)

#define DDB_TYPE        offsetof(struct asd_ddb_ssp_smp_target_port, ddb_type)

#define CONN_MASK       offsetof(struct asd_ddb_ssp_smp_target_port, conn_mask)

#define DDB_TARG_FLAGS  offsetof(struct asd_ddb_ssp_smp_target_port, flags)

#define DDB_TARG_FLAGS2 offsetof(struct asd_ddb_stp_sata_target_port, flags2)

#define EXEC_QUEUE_TAIL offsetof(struct asd_ddb_ssp_smp_target_port, exec_queue_tail)

#define SEND_QUEUE_TAIL offsetof(struct asd_ddb_ssp_smp_target_port, send_queue_tail)

#define SISTER_DDB      offsetof(struct asd_ddb_ssp_smp_target_port, sister_ddb)

#define MAX_CCONN       offsetof(struct asd_ddb_ssp_smp_target_port, max_concurrent_conn)

#define NUM_CTX         offsetof(struct asd_ddb_ssp_smp_target_port, num_contexts)

#define ATA_CMD_SCBPTR  offsetof(struct asd_ddb_stp_sata_target_port, ata_cmd_scbptr)

#define SATA_TAG_ALLOC_MASK offsetof(struct asd_ddb_stp_sata_target_port, sata_tag_alloc_mask)

#define NUM_SATA_TAGS   offsetof(struct asd_ddb_stp_sata_target_port, num_sata_tags)

#define SATA_STATUS     offsetof(struct asd_ddb_stp_sata_target_port, sata_status)

#define NCQ_DATA_SCB_PTR offsetof(struct asd_ddb_stp_sata_target_port, ncq_data_scb_ptr)

#define ITNL_TIMEOUT    offsetof(struct asd_ddb_ssp_smp_target_port, itnl_timeout)



static void asd_free_ddb(struct asd_ha_struct *asd_ha, int ddb)
{
	if (!ddb || ddb >= 0xFFFF)
		return;
	asd_ddbsite_write_byte(asd_ha, ddb, DDB_TYPE, DDB_TYPE_UNUSED);
	CLEAR_DDB(ddb, asd_ha);
}

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static void asd_set_ddb_type(struct domain_device *dev)
{
	struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
	int ddb = (int) (unsigned long) dev->lldd_dev;

	if (dev->dev_type == SAS_SATA_PM_PORT)
		asd_ddbsite_write_byte(asd_ha,ddb, DDB_TYPE, DDB_TYPE_PM_PORT);
	else if (dev->tproto)
		asd_ddbsite_write_byte(asd_ha,ddb, DDB_TYPE, DDB_TYPE_TARGET);
	else
		asd_ddbsite_write_byte(asd_ha,ddb,DDB_TYPE,DDB_TYPE_INITIATOR);
}

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static int asd_init_sata_tag_ddb(struct domain_device *dev)
{
	struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
	int ddb, i;

	ddb = asd_get_ddb(asd_ha);
	if (ddb < 0)
		return ddb;

	for (i = 0; i < sizeof(struct asd_ddb_sata_tag); i += 2)
		asd_ddbsite_write_word(asd_ha, ddb, i, 0xFFFF);

	asd_ddbsite_write_word(asd_ha, (int) (unsigned long) dev->lldd_dev,
			       SISTER_DDB, ddb);
	return 0;
}

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void asd_set_dmamode(struct domain_device *dev)
{
	struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
	struct ata_device *ata_dev = sas_to_ata_dev(dev);
	int ddb = (int) (unsigned long) dev->lldd_dev;
	u32 qdepth = 0;

	if (dev->dev_type == SAS_SATA_DEV || dev->dev_type == SAS_SATA_PM_PORT) {
		if (ata_id_has_ncq(ata_dev->id))
			qdepth = ata_id_queue_depth(ata_dev->id);
		asd_ddbsite_write_dword(asd_ha, ddb, SATA_TAG_ALLOC_MASK,
					(1ULL<<qdepth)-1);
		asd_ddbsite_write_byte(asd_ha, ddb, NUM_SATA_TAGS, qdepth);
	}

	if (qdepth > 0)
		if (asd_init_sata_tag_ddb(dev) != 0) {
			unsigned long flags;

			spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
			ata_dev->flags |= ATA_DFLAG_NCQ_OFF;
			spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
		}
}

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Total 167 100.00% 4 100.00%



static int asd_init_sata(struct domain_device *dev)
{
	struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
	int ddb = (int) (unsigned long) dev->lldd_dev;

	asd_ddbsite_write_word(asd_ha, ddb, ATA_CMD_SCBPTR, 0xFFFF);
	if (dev->dev_type == SAS_SATA_DEV || dev->dev_type == SAS_SATA_PM ||
	    dev->dev_type == SAS_SATA_PM_PORT) {
		struct dev_to_host_fis *fis = (struct dev_to_host_fis *)
			dev->frame_rcvd;
		asd_ddbsite_write_byte(asd_ha, ddb, SATA_STATUS, fis->status);
	}
	asd_ddbsite_write_word(asd_ha, ddb, NCQ_DATA_SCB_PTR, 0xFFFF);

	return 0;
}

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static int asd_init_target_ddb(struct domain_device *dev)
{
	int ddb, i;
	struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
	u8 flags = 0;

	ddb = asd_get_ddb(asd_ha);
	if (ddb < 0)
		return ddb;

	dev->lldd_dev = (void *) (unsigned long) ddb;

	asd_ddbsite_write_byte(asd_ha, ddb, 0, DDB_TP_CONN_TYPE);
	asd_ddbsite_write_byte(asd_ha, ddb, 1, 0);
	asd_ddbsite_write_word(asd_ha, ddb, INIT_CONN_TAG, 0xFFFF);
	for (i = 0; i < SAS_ADDR_SIZE; i++)
		asd_ddbsite_write_byte(asd_ha, ddb, DEST_SAS_ADDR+i,
				       dev->sas_addr[i]);
	asd_ddbsite_write_word(asd_ha, ddb, SEND_QUEUE_HEAD, 0xFFFF);
	asd_set_ddb_type(dev);
	asd_ddbsite_write_byte(asd_ha, ddb, CONN_MASK, dev->port->phy_mask);
	if (dev->port->oob_mode != SATA_OOB_MODE) {
		flags |= OPEN_REQUIRED;
		if ((dev->dev_type == SAS_SATA_DEV) ||
		    (dev->tproto & SAS_PROTOCOL_STP)) {
			struct smp_resp *rps_resp = &dev->sata_dev.rps_resp;
			if (rps_resp->frame_type == SMP_RESPONSE &&
			    rps_resp->function == SMP_REPORT_PHY_SATA &&
			    rps_resp->result == SMP_RESP_FUNC_ACC) {
				if (rps_resp->rps.affil_valid)
					flags |= STP_AFFIL_POL;
				if (rps_resp->rps.affil_supp)
					flags |= SUPPORTS_AFFIL;
			}
		} else {
			flags |= CONCURRENT_CONN_SUPP;
			if (!dev->parent &&
			    (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
			     dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE))
				asd_ddbsite_write_byte(asd_ha, ddb, MAX_CCONN,
						       4);
			else
				asd_ddbsite_write_byte(asd_ha, ddb, MAX_CCONN,
						       dev->pathways);
			asd_ddbsite_write_byte(asd_ha, ddb, NUM_CTX, 1);
		}
	}
	if (dev->dev_type == SAS_SATA_PM)
		flags |= SATA_MULTIPORT;
	asd_ddbsite_write_byte(asd_ha, ddb, DDB_TARG_FLAGS, flags);

	flags = 0;
	if (dev->tproto & SAS_PROTOCOL_STP)
		flags |= STP_CL_POL_NO_TX;
	asd_ddbsite_write_byte(asd_ha, ddb, DDB_TARG_FLAGS2, flags);

	asd_ddbsite_write_word(asd_ha, ddb, EXEC_QUEUE_TAIL, 0xFFFF);
	asd_ddbsite_write_word(asd_ha, ddb, SEND_QUEUE_TAIL, 0xFFFF);
	asd_ddbsite_write_word(asd_ha, ddb, SISTER_DDB, 0xFFFF);

	if (dev->dev_type == SAS_SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
		i = asd_init_sata(dev);
		if (i < 0) {
			asd_free_ddb(asd_ha, ddb);
			return i;
		}
	}

	if (dev->dev_type == SAS_END_DEVICE) {
		struct sas_end_device *rdev = rphy_to_end_device(dev->rphy);
		if (rdev->I_T_nexus_loss_timeout > 0)
			asd_ddbsite_write_word(asd_ha, ddb, ITNL_TIMEOUT,
					       min(rdev->I_T_nexus_loss_timeout,
						   (u16)ITNL_TIMEOUT_CONST));
		else
			asd_ddbsite_write_word(asd_ha, ddb, ITNL_TIMEOUT,
					       (u16)ITNL_TIMEOUT_CONST);
	}
	return 0;
}

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static int asd_init_sata_pm_table_ddb(struct domain_device *dev)
{
	struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
	int ddb, i;

	ddb = asd_get_ddb(asd_ha);
	if (ddb < 0)
		return ddb;

	for (i = 0; i < 32; i += 2)
		asd_ddbsite_write_word(asd_ha, ddb, i, 0xFFFF);

	asd_ddbsite_write_word(asd_ha, (int) (unsigned long) dev->lldd_dev,
			       SISTER_DDB, ddb);

	return 0;
}

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#define PM_PORT_FLAGS offsetof(struct asd_ddb_sata_pm_port, pm_port_flags)

#define PARENT_DDB    offsetof(struct asd_ddb_sata_pm_port, parent_ddb)

/**
 * asd_init_sata_pm_port_ddb -- SATA Port Multiplier Port
 * dev: pointer to domain device
 *
 * For SATA Port Multiplier Ports we need to allocate one SATA Port
 * Multiplier Port DDB and depending on whether the target on it
 * supports SATA II NCQ, one SATA Tag DDB.
 */


static int asd_init_sata_pm_port_ddb(struct domain_device *dev)
{
	int ddb, i, parent_ddb, pmtable_ddb;
	struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
	u8  flags;

	ddb = asd_get_ddb(asd_ha);
	if (ddb < 0)
		return ddb;

	asd_set_ddb_type(dev);
	flags = (dev->sata_dev.port_no << 4) | PM_PORT_SET;
	asd_ddbsite_write_byte(asd_ha, ddb, PM_PORT_FLAGS, flags);
	asd_ddbsite_write_word(asd_ha, ddb, SISTER_DDB, 0xFFFF);
	asd_ddbsite_write_word(asd_ha, ddb, ATA_CMD_SCBPTR, 0xFFFF);
	asd_init_sata(dev);

	parent_ddb = (int) (unsigned long) dev->parent->lldd_dev;
	asd_ddbsite_write_word(asd_ha, ddb, PARENT_DDB, parent_ddb);
	pmtable_ddb = asd_ddbsite_read_word(asd_ha, parent_ddb, SISTER_DDB);
	asd_ddbsite_write_word(asd_ha, pmtable_ddb, dev->sata_dev.port_no,ddb);

	if (asd_ddbsite_read_byte(asd_ha, ddb, NUM_SATA_TAGS) > 0) {
		i = asd_init_sata_tag_ddb(dev);
		if (i < 0) {
			asd_free_ddb(asd_ha, ddb);
			return i;
		}
	}
	return 0;
}

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static int asd_init_initiator_ddb(struct domain_device *dev)
{
	return -ENODEV;
}

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/**
 * asd_init_sata_pm_ddb -- SATA Port Multiplier
 * dev: pointer to domain device
 *
 * For STP and direct-attached SATA Port Multipliers we need
 * one target port DDB entry and one SATA PM table DDB entry.
 */


static int asd_init_sata_pm_ddb(struct domain_device *dev)
{
	int res = 0;

	res = asd_init_target_ddb(dev);
	if (res)
		goto out;
	res = asd_init_sata_pm_table_ddb(dev);
	if (res)
		asd_free_ddb(dev->port->ha->lldd_ha,
			     (int) (unsigned long) dev->lldd_dev);
out:
	return res;
}

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int asd_dev_found(struct domain_device *dev)
{
	unsigned long flags;
	int res = 0;
	struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;

	spin_lock_irqsave(&asd_ha->hw_prof.ddb_lock, flags);
	switch (dev->dev_type) {
	case SAS_SATA_PM:
		res = asd_init_sata_pm_ddb(dev);
		break;
	case SAS_SATA_PM_PORT:
		res = asd_init_sata_pm_port_ddb(dev);
		break;
	default:
		if (dev->tproto)
			res = asd_init_target_ddb(dev);
		else
			res = asd_init_initiator_ddb(dev);
	}
	spin_unlock_irqrestore(&asd_ha->hw_prof.ddb_lock, flags);

	return res;
}

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Total 111 100.00% 3 100.00%



void asd_dev_gone(struct domain_device *dev)
{
	int ddb, sister_ddb;
	unsigned long flags;
	struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;

	spin_lock_irqsave(&asd_ha->hw_prof.ddb_lock, flags);
	ddb = (int) (unsigned long) dev->lldd_dev;
	sister_ddb = asd_ddbsite_read_word(asd_ha, ddb, SISTER_DDB);

	if (sister_ddb != 0xFFFF)
		asd_free_ddb(asd_ha, sister_ddb);
	asd_free_ddb(asd_ha, ddb);
	dev->lldd_dev = NULL;
	spin_unlock_irqrestore(&asd_ha->hw_prof.ddb_lock, flags);
}
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james bottomley james bottomley 78 73.58% 1 50.00%
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Total 106 100.00% 2 100.00%

Overall Contributors
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james bottomley james bottomley 1619 89.05% 2 33.33%
dan williams dan williams 126 6.93% 1 16.67%
darrick j. wong darrick j. wong 73 4.02% 3 50.00%
Total 1818 100.00% 6 100.00%
  Directory: drivers/scsi/aic94xx

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
james bottomley	james bottomley	84	100.00%	1	100.00%
	Total	84	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/scsi/aic94xx/aic94xx_dev.c

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