[deliverable/linux.git] / drivers / scsi / libsas / sas_ata.c

/*
 * Support for SATA devices on Serial Attached SCSI (SAS) controllers
 *
 * Copyright (C) 2006 IBM Corporation
 *
 * Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
 *
 * 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

#include <scsi/sas_ata.h>
#include "sas_internal.h"
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_sas.h>
#include "../scsi_sas_internal.h"

static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
{
	/* Cheesy attempt to translate SAS errors into ATA.  Hah! */

	/* transport error */
	if (ts->resp == SAS_TASK_UNDELIVERED)
		return AC_ERR_ATA_BUS;

	/* ts->resp == SAS_TASK_COMPLETE */
	/* task delivered, what happened afterwards? */
	switch (ts->stat) {
		case SAS_DEV_NO_RESPONSE:
			return AC_ERR_TIMEOUT;

		case SAS_INTERRUPTED:
		case SAS_PHY_DOWN:
		case SAS_NAK_R_ERR:
			return AC_ERR_ATA_BUS;


		case SAS_DATA_UNDERRUN:
			/*
			 * Some programs that use the taskfile interface
			 * (smartctl in particular) can cause underrun
			 * problems.  Ignore these errors, perhaps at our
			 * peril.
			 */
			return 0;

		case SAS_DATA_OVERRUN:
		case SAS_QUEUE_FULL:
		case SAS_DEVICE_UNKNOWN:
		case SAS_SG_ERR:
			return AC_ERR_INVALID;

		case SAM_CHECK_COND:
		case SAS_OPEN_TO:
		case SAS_OPEN_REJECT:
			SAS_DPRINTK("%s: Saw error %d.  What to do?\n",
				    __FUNCTION__, ts->stat);
			return AC_ERR_OTHER;

		case SAS_ABORTED_TASK:
			return AC_ERR_DEV;

		case SAS_PROTO_RESPONSE:
			/* This means the ending_fis has the error
			 * value; return 0 here to collect it */
			return 0;
		default:
			return 0;
	}
}

static void sas_ata_task_done(struct sas_task *task)
{
	struct ata_queued_cmd *qc = task->uldd_task;
	struct domain_device *dev;
	struct task_status_struct *stat = &task->task_status;
	struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
	enum ata_completion_errors ac;
	unsigned long flags;

	if (!qc)
		goto qc_already_gone;

	dev = qc->ap->private_data;

	spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
	if (stat->stat == SAS_PROTO_RESPONSE) {
		ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
		qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
		dev->sata_dev.sstatus = resp->sstatus;
		dev->sata_dev.serror = resp->serror;
		dev->sata_dev.scontrol = resp->scontrol;
	} else if (stat->stat != SAM_STAT_GOOD) {
		ac = sas_to_ata_err(stat);
		if (ac) {
			SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__,
				    stat->stat);
			/* We saw a SAS error. Send a vague error. */
			qc->err_mask = ac;
			dev->sata_dev.tf.feature = 0x04; /* status err */
			dev->sata_dev.tf.command = ATA_ERR;
		}
	}

	qc->lldd_task = NULL;
	ata_qc_complete(qc);
	spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);

qc_already_gone:
	list_del_init(&task->list);
	sas_free_task(task);
}

static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
{
	int res;
	struct sas_task *task;
	struct domain_device *dev = qc->ap->private_data;
	struct sas_ha_struct *sas_ha = dev->port->ha;
	struct Scsi_Host *host = sas_ha->core.shost;
	struct sas_internal *i = to_sas_internal(host->transportt);
	struct scatterlist *sg;
	unsigned int num = 0;
	unsigned int xfer = 0;

	task = sas_alloc_task(GFP_ATOMIC);
	if (!task)
		return AC_ERR_SYSTEM;
	task->dev = dev;
	task->task_proto = SAS_PROTOCOL_STP;
	task->task_done = sas_ata_task_done;

	if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
	    qc->tf.command == ATA_CMD_FPDMA_READ) {
		/* Need to zero out the tag libata assigned us */
		qc->tf.nsect = 0;
	}

	ata_tf_to_fis(&qc->tf, (u8*)&task->ata_task.fis, 0);
	task->uldd_task = qc;
	if (is_atapi_taskfile(&qc->tf)) {
		memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
		task->total_xfer_len = qc->nbytes + qc->pad_len;
		task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem;
	} else {
		ata_for_each_sg(sg, qc) {
			num++;
			xfer += sg->length;
		}

		task->total_xfer_len = xfer;
		task->num_scatter = num;
	}

	task->data_dir = qc->dma_dir;
	task->scatter = qc->__sg;
	task->ata_task.retry_count = 1;
	task->task_state_flags = SAS_TASK_STATE_PENDING;
	qc->lldd_task = task;

	switch (qc->tf.protocol) {
	case ATA_PROT_NCQ:
		task->ata_task.use_ncq = 1;
		/* fall through */
	case ATA_PROT_ATAPI_DMA:
	case ATA_PROT_DMA:
		task->ata_task.dma_xfer = 1;
		break;
	}

	if (sas_ha->lldd_max_execute_num < 2)
		res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
	else
		res = sas_queue_up(task);

	/* Examine */
	if (res) {
		SAS_DPRINTK("lldd_execute_task returned: %d\n", res);

		sas_free_task(task);
		return AC_ERR_SYSTEM;
	}

	return 0;
}

static u8 sas_ata_check_status(struct ata_port *ap)
{
	struct domain_device *dev = ap->private_data;
	return dev->sata_dev.tf.command;
}

static void sas_ata_phy_reset(struct ata_port *ap)
{
	struct domain_device *dev = ap->private_data;
	struct sas_internal *i =
		to_sas_internal(dev->port->ha->core.shost->transportt);
	int res = 0;

	if (i->dft->lldd_I_T_nexus_reset)
		res = i->dft->lldd_I_T_nexus_reset(dev);

	if (res)
		SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__);

	switch (dev->sata_dev.command_set) {
		case ATA_COMMAND_SET:
			SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
			ap->device[0].class = ATA_DEV_ATA;
			break;
		case ATAPI_COMMAND_SET:
			SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
			ap->device[0].class = ATA_DEV_ATAPI;
			break;
		default:
			SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
				    __FUNCTION__,
				    dev->sata_dev.command_set);
			ap->device[0].class = ATA_DEV_ATA;
			break;
	}

	ap->cbl = ATA_CBL_SATA;
}

static void sas_ata_post_internal(struct ata_queued_cmd *qc)
{
	if (qc->flags & ATA_QCFLAG_FAILED)
		qc->err_mask |= AC_ERR_OTHER;

	if (qc->err_mask) {
		/*
		 * Find the sas_task and kill it.  By this point,
		 * libata has decided to kill the qc, so we needn't
		 * bother with sas_ata_task_done.  But we still
		 * ought to abort the task.
		 */
		struct sas_task *task = qc->lldd_task;
		struct domain_device *dev = qc->ap->private_data;

		qc->lldd_task = NULL;
		if (task) {
			task->uldd_task = NULL;
			__sas_task_abort(task);
		}

		sas_phy_reset(dev->port->phy, 1);
	}
}

static void sas_ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
{
	struct domain_device *dev = ap->private_data;
	memcpy(tf, &dev->sata_dev.tf, sizeof (*tf));
}

static void sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
			      u32 val)
{
	struct domain_device *dev = ap->private_data;

	SAS_DPRINTK("STUB %s\n", __FUNCTION__);
	switch (sc_reg_in) {
		case SCR_STATUS:
			dev->sata_dev.sstatus = val;
			break;
		case SCR_CONTROL:
			dev->sata_dev.scontrol = val;
			break;
		case SCR_ERROR:
			dev->sata_dev.serror = val;
			break;
		case SCR_ACTIVE:
			dev->sata_dev.ap->sactive = val;
			break;
	}
}

static u32 sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
{
	struct domain_device *dev = ap->private_data;

	SAS_DPRINTK("STUB %s\n", __FUNCTION__);
	switch (sc_reg_in) {
		case SCR_STATUS:
			return dev->sata_dev.sstatus;
		case SCR_CONTROL:
			return dev->sata_dev.scontrol;
		case SCR_ERROR:
			return dev->sata_dev.serror;
		case SCR_ACTIVE:
			return dev->sata_dev.ap->sactive;
		default:
			return 0xffffffffU;
	}
}

static struct ata_port_operations sas_sata_ops = {
	.port_disable		= ata_port_disable,
	.check_status		= sas_ata_check_status,
	.check_altstatus	= sas_ata_check_status,
	.dev_select		= ata_noop_dev_select,
	.phy_reset		= sas_ata_phy_reset,
	.post_internal_cmd	= sas_ata_post_internal,
	.tf_read		= sas_ata_tf_read,
	.qc_prep		= ata_noop_qc_prep,
	.qc_issue		= sas_ata_qc_issue,
	.port_start		= ata_sas_port_start,
	.port_stop		= ata_sas_port_stop,
	.scr_read		= sas_ata_scr_read,
	.scr_write		= sas_ata_scr_write
};

static struct ata_port_info sata_port_info = {
	.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET |
		ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ,
	.pio_mask = 0x1f, /* PIO0-4 */
	.mwdma_mask = 0x07, /* MWDMA0-2 */
	.udma_mask = ATA_UDMA6,
	.port_ops = &sas_sata_ops
};

int sas_ata_init_host_and_port(struct domain_device *found_dev,
			       struct scsi_target *starget)
{
	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
	struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
	struct ata_port *ap;

	ata_host_init(&found_dev->sata_dev.ata_host,
		      &ha->pcidev->dev,
		      sata_port_info.flags,
		      &sas_sata_ops);
	ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
				&sata_port_info,
				shost);
	if (!ap) {
		SAS_DPRINTK("ata_sas_port_alloc failed.\n");
		return -ENODEV;
	}

	ap->private_data = found_dev;
	ap->cbl = ATA_CBL_SATA;
	ap->scsi_host = shost;
	found_dev->sata_dev.ap = ap;

	return 0;
}
Commit	Line	Data
338ec570 DW	1	/*
	2	* Support for SATA devices on Serial Attached SCSI (SAS) controllers
	3	*
	4	* Copyright (C) 2006 IBM Corporation
	5	*
	6	* Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of the
	11	* License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
	21	* USA
	22	*/
	23
	24	#include <scsi/sas_ata.h>
	25	#include "sas_internal.h"
	26	#include <scsi/scsi_host.h>
	27	#include <scsi/scsi_device.h>
	28	#include <scsi/scsi_tcq.h>
	29	#include <scsi/scsi.h>
	30	#include <scsi/scsi_transport.h>
	31	#include <scsi/scsi_transport_sas.h>
	32	#include "../scsi_sas_internal.h"
	33
	34	static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
	35	{
	36	/* Cheesy attempt to translate SAS errors into ATA. Hah! */
	37
	38	/* transport error */
	39	if (ts->resp == SAS_TASK_UNDELIVERED)
	40	return AC_ERR_ATA_BUS;
	41
	42	/* ts->resp == SAS_TASK_COMPLETE */
	43	/* task delivered, what happened afterwards? */
	44	switch (ts->stat) {
	45	case SAS_DEV_NO_RESPONSE:
	46	return AC_ERR_TIMEOUT;
	47
	48	case SAS_INTERRUPTED:
	49	case SAS_PHY_DOWN:
	50	case SAS_NAK_R_ERR:
	51	return AC_ERR_ATA_BUS;
	52
	53
	54	case SAS_DATA_UNDERRUN:
	55	/*
	56	* Some programs that use the taskfile interface
	57	* (smartctl in particular) can cause underrun
	58	* problems. Ignore these errors, perhaps at our
	59	* peril.
	60	*/
	61	return 0;
	62
	63	case SAS_DATA_OVERRUN:
	64	case SAS_QUEUE_FULL:
65	case SAS_DEVICE_UNKNOWN:
66	case SAS_SG_ERR:
67	return AC_ERR_INVALID;
68
69	case SAM_CHECK_COND:
70	case SAS_OPEN_TO:
71	case SAS_OPEN_REJECT:
72	SAS_DPRINTK("%s: Saw error %d. What to do?\n",
73	__FUNCTION__, ts->stat);
74	return AC_ERR_OTHER;
75
76	case SAS_ABORTED_TASK:
77	return AC_ERR_DEV;
78
79	case SAS_PROTO_RESPONSE:
80	/* This means the ending_fis has the error
81	* value; return 0 here to collect it */
82	return 0;
83	default:
84	return 0;
85	}
86	}
87
88	static void sas_ata_task_done(struct sas_task *task)
89	{
90	struct ata_queued_cmd *qc = task->uldd_task;
1c50dc83	91	struct domain_device *dev;
338ec570 DW	92	struct task_status_struct *stat = &task->task_status;
	93	struct ata_task_resp resp = (struct ata_task_resp )stat->buf;
	94	enum ata_completion_errors ac;
3eb7a51a	95	unsigned long flags;
338ec570	96
1c50dc83 DW	97	if (!qc)
	98	goto qc_already_gone;
	99
	100	dev = qc->ap->private_data;
	101
3eb7a51a	102	spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
338ec570 DW	103	if (stat->stat == SAS_PROTO_RESPONSE) {
	104	ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
	105	qc->err_mask \|= ac_err_mask(dev->sata_dev.tf.command);
	106	dev->sata_dev.sstatus = resp->sstatus;
	107	dev->sata_dev.serror = resp->serror;
	108	dev->sata_dev.scontrol = resp->scontrol;
338ec570 DW	109	} else if (stat->stat != SAM_STAT_GOOD) {
	110	ac = sas_to_ata_err(stat);
	111	if (ac) {
	112	SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__,
	113	stat->stat);
	114	/* We saw a SAS error. Send a vague error. */
	115	qc->err_mask = ac;
	116	dev->sata_dev.tf.feature = 0x04; /* status err */
	117	dev->sata_dev.tf.command = ATA_ERR;
	118	}
	119	}
	120
1c50dc83	121	qc->lldd_task = NULL;
338ec570	122	ata_qc_complete(qc);
3eb7a51a DW	123	spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
3eb7a51a DW	124
1c50dc83	125	qc_already_gone:
338ec570 DW	126	list_del_init(&task->list);
	127	sas_free_task(task);
	128	}
	129
	130	static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
	131	{
35a7f2f6	132	int res;
338ec570 DW	133	struct sas_task *task;
	134	struct domain_device *dev = qc->ap->private_data;
	135	struct sas_ha_struct *sas_ha = dev->port->ha;
	136	struct Scsi_Host *host = sas_ha->core.shost;
	137	struct sas_internal *i = to_sas_internal(host->transportt);
	138	struct scatterlist *sg;
	139	unsigned int num = 0;
	140	unsigned int xfer = 0;
	141
	142	task = sas_alloc_task(GFP_ATOMIC);
	143	if (!task)
35a7f2f6	144	return AC_ERR_SYSTEM;
338ec570 DW	145	task->dev = dev;
	146	task->task_proto = SAS_PROTOCOL_STP;
	147	task->task_done = sas_ata_task_done;
	148
	149	if (qc->tf.command == ATA_CMD_FPDMA_WRITE \|\|
	150	qc->tf.command == ATA_CMD_FPDMA_READ) {
	151	/* Need to zero out the tag libata assigned us */
	152	qc->tf.nsect = 0;
	153	}
	154
	155	ata_tf_to_fis(&qc->tf, (u8*)&task->ata_task.fis, 0);
	156	task->uldd_task = qc;
	157	if (is_atapi_taskfile(&qc->tf)) {
	158	memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
	159	task->total_xfer_len = qc->nbytes + qc->pad_len;
	160	task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem;
	161	} else {
	162	ata_for_each_sg(sg, qc) {
	163	num++;
	164	xfer += sg->length;
	165	}
	166
	167	task->total_xfer_len = xfer;
	168	task->num_scatter = num;
	169	}
	170
	171	task->data_dir = qc->dma_dir;
	172	task->scatter = qc->__sg;
	173	task->ata_task.retry_count = 1;
	174	task->task_state_flags = SAS_TASK_STATE_PENDING;
1c50dc83	175	qc->lldd_task = task;
338ec570 DW	176
	177	switch (qc->tf.protocol) {
	178	case ATA_PROT_NCQ:
	179	task->ata_task.use_ncq = 1;
	180	/* fall through */
	181	case ATA_PROT_ATAPI_DMA:
	182	case ATA_PROT_DMA:
	183	task->ata_task.dma_xfer = 1;
	184	break;
	185	}
	186
	187	if (sas_ha->lldd_max_execute_num < 2)
	188	res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
	189	else
	190	res = sas_queue_up(task);
	191
	192	/* Examine */
	193	if (res) {
	194	SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
	195
	196	sas_free_task(task);
35a7f2f6	197	return AC_ERR_SYSTEM;
338ec570 DW	198	}
338ec570 DW	199
35a7f2f6	200	return 0;
338ec570 DW	201	}
	202
	203	static u8 sas_ata_check_status(struct ata_port *ap)
	204	{
	205	struct domain_device *dev = ap->private_data;
	206	return dev->sata_dev.tf.command;
	207	}
	208
	209	static void sas_ata_phy_reset(struct ata_port *ap)
	210	{
	211	struct domain_device *dev = ap->private_data;
	212	struct sas_internal *i =
	213	to_sas_internal(dev->port->ha->core.shost->transportt);
	214	int res = 0;
	215
	216	if (i->dft->lldd_I_T_nexus_reset)
	217	res = i->dft->lldd_I_T_nexus_reset(dev);
	218
	219	if (res)
	220	SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__);
	221
	222	switch (dev->sata_dev.command_set) {
	223	case ATA_COMMAND_SET:
	224	SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
	225	ap->device[0].class = ATA_DEV_ATA;
	226	break;
	227	case ATAPI_COMMAND_SET:
	228	SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
	229	ap->device[0].class = ATA_DEV_ATAPI;
	230	break;
	231	default:
	232	SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
	233	__FUNCTION__,
	234	dev->sata_dev.command_set);
	235	ap->device[0].class = ATA_DEV_ATA;
	236	break;
	237	}
	238
	239	ap->cbl = ATA_CBL_SATA;
	240	}
	241
	242	static void sas_ata_post_internal(struct ata_queued_cmd *qc)
	243	{
	244	if (qc->flags & ATA_QCFLAG_FAILED)
	245	qc->err_mask \|= AC_ERR_OTHER;
	246
1c50dc83 DW	247	if (qc->err_mask) {
	248	/*
	249	* Find the sas_task and kill it. By this point,
	250	* libata has decided to kill the qc, so we needn't
	251	* bother with sas_ata_task_done. But we still
	252	* ought to abort the task.
	253	*/
	254	struct sas_task *task = qc->lldd_task;
	255	struct domain_device *dev = qc->ap->private_data;
	256
	257	qc->lldd_task = NULL;
	258	if (task) {
	259	task->uldd_task = NULL;
	260	__sas_task_abort(task);
	261	}
	262
	263	sas_phy_reset(dev->port->phy, 1);
	264	}
338ec570 DW	265	}
	266
	267	static void sas_ata_tf_read(struct ata_port ap, struct ata_taskfile tf)
	268	{
	269	struct domain_device *dev = ap->private_data;
	270	memcpy(tf, &dev->sata_dev.tf, sizeof (*tf));
	271	}
	272
	273	static void sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
	274	u32 val)
	275	{
	276	struct domain_device *dev = ap->private_data;
	277
	278	SAS_DPRINTK("STUB %s\n", __FUNCTION__);
	279	switch (sc_reg_in) {
	280	case SCR_STATUS:
	281	dev->sata_dev.sstatus = val;
	282	break;
	283	case SCR_CONTROL:
	284	dev->sata_dev.scontrol = val;
	285	break;
	286	case SCR_ERROR:
	287	dev->sata_dev.serror = val;
	288	break;
	289	case SCR_ACTIVE:
	290	dev->sata_dev.ap->sactive = val;
	291	break;
	292	}
	293	}
	294
	295	static u32 sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
	296	{
	297	struct domain_device *dev = ap->private_data;
	298
	299	SAS_DPRINTK("STUB %s\n", __FUNCTION__);
	300	switch (sc_reg_in) {
	301	case SCR_STATUS:
	302	return dev->sata_dev.sstatus;
	303	case SCR_CONTROL:
	304	return dev->sata_dev.scontrol;
	305	case SCR_ERROR:
	306	return dev->sata_dev.serror;
	307	case SCR_ACTIVE:
	308	return dev->sata_dev.ap->sactive;
	309	default:
	310	return 0xffffffffU;
	311	}
	312	}
	313
	314	static struct ata_port_operations sas_sata_ops = {
	315	.port_disable = ata_port_disable,
	316	.check_status = sas_ata_check_status,
	317	.check_altstatus = sas_ata_check_status,
	318	.dev_select = ata_noop_dev_select,
	319	.phy_reset = sas_ata_phy_reset,
	320	.post_internal_cmd = sas_ata_post_internal,
	321	.tf_read = sas_ata_tf_read,
	322	.qc_prep = ata_noop_qc_prep,
	323	.qc_issue = sas_ata_qc_issue,
	324	.port_start = ata_sas_port_start,
	325	.port_stop = ata_sas_port_stop,
	326	.scr_read = sas_ata_scr_read,
	327	.scr_write = sas_ata_scr_write
	328	};
329
330	static struct ata_port_info sata_port_info = {
331	.flags = ATA_FLAG_SATA \| ATA_FLAG_NO_LEGACY \| ATA_FLAG_SATA_RESET \|
332	ATA_FLAG_MMIO \| ATA_FLAG_PIO_DMA \| ATA_FLAG_NCQ,
333	.pio_mask = 0x1f, /* PIO0-4 */
334	.mwdma_mask = 0x07, /* MWDMA0-2 */
335	.udma_mask = ATA_UDMA6,
336	.port_ops = &sas_sata_ops
337	};
338
339	int sas_ata_init_host_and_port(struct domain_device *found_dev,
340	struct scsi_target *starget)
341	{
342	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
343	struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
344	struct ata_port *ap;
345
346	ata_host_init(&found_dev->sata_dev.ata_host,
347	&ha->pcidev->dev,
348	sata_port_info.flags,
349	&sas_sata_ops);
350	ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
351	&sata_port_info,
352	shost);
353	if (!ap) {
354	SAS_DPRINTK("ata_sas_port_alloc failed.\n");
355	return -ENODEV;
356	}
357
358	ap->private_data = found_dev;
359	ap->cbl = ATA_CBL_SATA;
360	ap->scsi_host = shost;
361	found_dev->sata_dev.ap = ap;
362
363	return 0;
364	}