[linux-2.6-block.git] / drivers / scsi / libsas / sas_phy.c

/*
 * Serial Attached SCSI (SAS) Phy class
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 *
 * This file is licensed under GPLv2.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

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

/* ---------- Phy events ---------- */

static void sas_phye_loss_of_signal(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;

	clear_bit(PHYE_LOSS_OF_SIGNAL, &phy->phy_events_pending);
	phy->error = 0;
	sas_deform_port(phy, 1);
}

static void sas_phye_oob_done(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;

	clear_bit(PHYE_OOB_DONE, &phy->phy_events_pending);
	phy->error = 0;
}

static void sas_phye_oob_error(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;
	struct sas_ha_struct *sas_ha = phy->ha;
	struct asd_sas_port *port = phy->port;
	struct sas_internal *i =
		to_sas_internal(sas_ha->core.shost->transportt);

	clear_bit(PHYE_OOB_ERROR, &phy->phy_events_pending);

	sas_deform_port(phy, 1);

	if (!port && phy->enabled && i->dft->lldd_control_phy) {
		phy->error++;
		switch (phy->error) {
		case 1:
		case 2:
			i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET,
						 NULL);
			break;
		case 3:
		default:
			phy->error = 0;
			phy->enabled = 0;
			i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
			break;
		}
	}
}

static void sas_phye_spinup_hold(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;
	struct sas_ha_struct *sas_ha = phy->ha;
	struct sas_internal *i =
		to_sas_internal(sas_ha->core.shost->transportt);

	clear_bit(PHYE_SPINUP_HOLD, &phy->phy_events_pending);

	phy->error = 0;
	i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL);
}

static void sas_phye_resume_timeout(struct work_struct *work)
{
	struct asd_sas_event *ev = to_asd_sas_event(work);
	struct asd_sas_phy *phy = ev->phy;

	clear_bit(PHYE_RESUME_TIMEOUT, &phy->phy_events_pending);

	/* phew, lldd got the phy back in the nick of time */
	if (!phy->suspended) {
		dev_info(&phy->phy->dev, "resume timeout cancelled\n");
		return;
	}

	phy->error = 0;
	phy->suspended = 0;
	sas_deform_port(phy, 1);
}


/* ---------- Phy class registration ---------- */

int sas_register_phys(struct sas_ha_struct *sas_ha)
{
	int i;

	static const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = {
		[PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal,
		[PHYE_OOB_DONE] = sas_phye_oob_done,
		[PHYE_OOB_ERROR] = sas_phye_oob_error,
		[PHYE_SPINUP_HOLD] = sas_phye_spinup_hold,
		[PHYE_RESUME_TIMEOUT] = sas_phye_resume_timeout,

	};

	static const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = {
		[PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed,
		[PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd,
		[PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err,
		[PORTE_TIMER_EVENT] = sas_porte_timer_event,
		[PORTE_HARD_RESET] = sas_porte_hard_reset,
	};

	/* Now register the phys. */
	for (i = 0; i < sas_ha->num_phys; i++) {
		int k;
		struct asd_sas_phy *phy = sas_ha->sas_phy[i];

		phy->error = 0;
		INIT_LIST_HEAD(&phy->port_phy_el);
		for (k = 0; k < PORT_NUM_EVENTS; k++) {
			INIT_SAS_WORK(&phy->port_events[k].work, sas_port_event_fns[k]);
			phy->port_events[k].phy = phy;
		}

		for (k = 0; k < PHY_NUM_EVENTS; k++) {
			INIT_SAS_WORK(&phy->phy_events[k].work, sas_phy_event_fns[k]);
			phy->phy_events[k].phy = phy;
		}

		phy->port = NULL;
		phy->ha = sas_ha;
		spin_lock_init(&phy->frame_rcvd_lock);
		spin_lock_init(&phy->sas_prim_lock);
		phy->frame_rcvd_size = 0;

		phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev, i);
		if (!phy->phy)
			return -ENOMEM;

		phy->phy->identify.initiator_port_protocols =
			phy->iproto;
		phy->phy->identify.target_port_protocols = phy->tproto;
		phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr);
		phy->phy->identify.phy_identifier = i;
		phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
		phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
		phy->phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
		phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
		phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;

		sas_phy_add(phy->phy);
	}

	return 0;
}
Commit	Line	Data
2908d778 JB	1	/*
	2	* Serial Attached SCSI (SAS) Phy class
	3	*
	4	* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
	5	* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
	6	*
	7	* This file is licensed under GPLv2.
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License as
	11	* published by the Free Software Foundation; either version 2 of the
	12	* License, or (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	22	*
	23	*/
	24
	25	#include "sas_internal.h"
	26	#include <scsi/scsi_host.h>
	27	#include <scsi/scsi_transport.h>
	28	#include <scsi/scsi_transport_sas.h>
	29	#include "../scsi_sas_internal.h"
	30
	31	/* ---------- Phy events ---------- */
	32
c4028958	33	static void sas_phye_loss_of_signal(struct work_struct *work)
2908d778	34	{
22b9153f	35	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	36	struct asd_sas_phy *phy = ev->phy;
2908d778	37
b15ebe0b	38	clear_bit(PHYE_LOSS_OF_SIGNAL, &phy->phy_events_pending);
2908d778	39	phy->error = 0;
90f1e10d	40	sas_deform_port(phy, 1);
2908d778 JB	41	}
2908d778 JB	42
c4028958	43	static void sas_phye_oob_done(struct work_struct *work)
2908d778	44	{
22b9153f	45	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	46	struct asd_sas_phy *phy = ev->phy;
2908d778	47
b15ebe0b	48	clear_bit(PHYE_OOB_DONE, &phy->phy_events_pending);
2908d778 JB	49	phy->error = 0;
	50	}
	51
c4028958	52	static void sas_phye_oob_error(struct work_struct *work)
2908d778	53	{
22b9153f	54	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	55	struct asd_sas_phy *phy = ev->phy;
2908d778 JB	56	struct sas_ha_struct *sas_ha = phy->ha;
	57	struct asd_sas_port *port = phy->port;
	58	struct sas_internal *i =
	59	to_sas_internal(sas_ha->core.shost->transportt);
	60
b15ebe0b	61	clear_bit(PHYE_OOB_ERROR, &phy->phy_events_pending);
2908d778	62
90f1e10d	63	sas_deform_port(phy, 1);
2908d778 JB	64
	65	if (!port && phy->enabled && i->dft->lldd_control_phy) {
	66	phy->error++;
	67	switch (phy->error) {
	68	case 1:
	69	case 2:
a01e70e5 JB	70	i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET,
a01e70e5 JB	71	NULL);
2908d778 JB	72	break;
	73	case 3:
	74	default:
	75	phy->error = 0;
	76	phy->enabled = 0;
a01e70e5	77	i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
2908d778 JB	78	break;
	79	}
	80	}
	81	}
	82
c4028958	83	static void sas_phye_spinup_hold(struct work_struct *work)
2908d778	84	{
22b9153f	85	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	86	struct asd_sas_phy *phy = ev->phy;
2908d778 JB	87	struct sas_ha_struct *sas_ha = phy->ha;
	88	struct sas_internal *i =
	89	to_sas_internal(sas_ha->core.shost->transportt);
	90
b15ebe0b	91	clear_bit(PHYE_SPINUP_HOLD, &phy->phy_events_pending);
2908d778 JB	92
2908d778 JB	93	phy->error = 0;
a01e70e5	94	i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL);
2908d778 JB	95	}
2908d778 JB	96
303694ee DW	97	static void sas_phye_resume_timeout(struct work_struct *work)
	98	{
	99	struct asd_sas_event *ev = to_asd_sas_event(work);
	100	struct asd_sas_phy *phy = ev->phy;
	101
	102	clear_bit(PHYE_RESUME_TIMEOUT, &phy->phy_events_pending);
	103
	104	/* phew, lldd got the phy back in the nick of time */
	105	if (!phy->suspended) {
	106	dev_info(&phy->phy->dev, "resume timeout cancelled\n");
	107	return;
	108	}
	109
	110	phy->error = 0;
	111	phy->suspended = 0;
	112	sas_deform_port(phy, 1);
	113	}
	114
	115
2908d778 JB	116	/* ---------- Phy class registration ---------- */
	117
	118	int sas_register_phys(struct sas_ha_struct *sas_ha)
	119	{
	120	int i;
	121
c4028958	122	static const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = {
2908d778 JB	123	[PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal,
	124	[PHYE_OOB_DONE] = sas_phye_oob_done,
	125	[PHYE_OOB_ERROR] = sas_phye_oob_error,
	126	[PHYE_SPINUP_HOLD] = sas_phye_spinup_hold,
303694ee DW	127	[PHYE_RESUME_TIMEOUT] = sas_phye_resume_timeout,
303694ee DW	128
2908d778 JB	129	};
2908d778 JB	130
c4028958	131	static const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = {
2908d778 JB	132	[PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed,
	133	[PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd,
	134	[PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err,
	135	[PORTE_TIMER_EVENT] = sas_porte_timer_event,
	136	[PORTE_HARD_RESET] = sas_porte_hard_reset,
	137	};
	138
	139	/* Now register the phys. */
	140	for (i = 0; i < sas_ha->num_phys; i++) {
	141	int k;
	142	struct asd_sas_phy *phy = sas_ha->sas_phy[i];
	143
	144	phy->error = 0;
	145	INIT_LIST_HEAD(&phy->port_phy_el);
c4028958	146	for (k = 0; k < PORT_NUM_EVENTS; k++) {
22b9153f	147	INIT_SAS_WORK(&phy->port_events[k].work, sas_port_event_fns[k]);
c4028958 DH	148	phy->port_events[k].phy = phy;
	149	}
	150
	151	for (k = 0; k < PHY_NUM_EVENTS; k++) {
22b9153f	152	INIT_SAS_WORK(&phy->phy_events[k].work, sas_phy_event_fns[k]);
c4028958 DH	153	phy->phy_events[k].phy = phy;
c4028958 DH	154	}
2908d778	155
2908d778 JB	156	phy->port = NULL;
	157	phy->ha = sas_ha;
	158	spin_lock_init(&phy->frame_rcvd_lock);
	159	spin_lock_init(&phy->sas_prim_lock);
	160	phy->frame_rcvd_size = 0;
	161
22b9153f	162	phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev, i);
2908d778 JB	163	if (!phy->phy)
	164	return -ENOMEM;
	165
	166	phy->phy->identify.initiator_port_protocols =
	167	phy->iproto;
	168	phy->phy->identify.target_port_protocols = phy->tproto;
	169	phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr);
	170	phy->phy->identify.phy_identifier = i;
a01e70e5 JB	171	phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	172	phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	173	phy->phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
	174	phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
2908d778 JB	175	phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
	176
	177	sas_phy_add(phy->phy);
	178	}
	179
	180	return 0;
	181	}