[mirror_ubuntu-bionic-kernel.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;

	phy->in_shutdown = 0;
	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;

	phy->in_shutdown = 0;
	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);

	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);

	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;

	/* 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);
}


static void sas_phye_shutdown(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);

	if (phy->enabled) {
		int ret;

		phy->error = 0;
		phy->enabled = 0;
		ret = i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
		if (ret)
			sas_printk("lldd disable phy%02d returned %d\n",
				phy->id, ret);
	} else
		sas_printk("phy%02d is not enabled, cannot shutdown\n",
			phy->id);
}

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

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

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

		phy->error = 0;
		atomic_set(&phy->event_nr, 0);
		INIT_LIST_HEAD(&phy->port_phy_el);

		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;
}

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,
	[PHYE_SHUTDOWN] = sas_phye_shutdown,
};
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
ef84e289	38	phy->in_shutdown = 0;
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
ef84e289	48	phy->in_shutdown = 0;
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
90f1e10d	61	sas_deform_port(phy, 1);
2908d778 JB	62
	63	if (!port && phy->enabled && i->dft->lldd_control_phy) {
	64	phy->error++;
	65	switch (phy->error) {
	66	case 1:
	67	case 2:
a01e70e5 JB	68	i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET,
a01e70e5 JB	69	NULL);
2908d778 JB	70	break;
	71	case 3:
	72	default:
	73	phy->error = 0;
	74	phy->enabled = 0;
a01e70e5	75	i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
2908d778 JB	76	break;
	77	}
	78	}
	79	}
	80
c4028958	81	static void sas_phye_spinup_hold(struct work_struct *work)
2908d778	82	{
22b9153f	83	struct asd_sas_event *ev = to_asd_sas_event(work);
c4028958	84	struct asd_sas_phy *phy = ev->phy;
2908d778 JB	85	struct sas_ha_struct *sas_ha = phy->ha;
	86	struct sas_internal *i =
	87	to_sas_internal(sas_ha->core.shost->transportt);
	88
2908d778	89	phy->error = 0;
a01e70e5	90	i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL);
2908d778 JB	91	}
2908d778 JB	92
303694ee DW	93	static void sas_phye_resume_timeout(struct work_struct *work)
	94	{
	95	struct asd_sas_event *ev = to_asd_sas_event(work);
	96	struct asd_sas_phy *phy = ev->phy;
	97
303694ee DW	98	/* phew, lldd got the phy back in the nick of time */
	99	if (!phy->suspended) {
	100	dev_info(&phy->phy->dev, "resume timeout cancelled\n");
	101	return;
	102	}
	103
	104	phy->error = 0;
	105	phy->suspended = 0;
	106	sas_deform_port(phy, 1);
	107	}
	108
	109
ef84e289 JY	110	static void sas_phye_shutdown(struct work_struct *work)
	111	{
	112	struct asd_sas_event *ev = to_asd_sas_event(work);
	113	struct asd_sas_phy *phy = ev->phy;
	114	struct sas_ha_struct *sas_ha = phy->ha;
	115	struct sas_internal *i =
	116	to_sas_internal(sas_ha->core.shost->transportt);
	117
	118	if (phy->enabled) {
	119	int ret;
	120
	121	phy->error = 0;
	122	phy->enabled = 0;
	123	ret = i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE, NULL);
	124	if (ret)
	125	sas_printk("lldd disable phy%02d returned %d\n",
	126	phy->id, ret);
	127	} else
	128	sas_printk("phy%02d is not enabled, cannot shutdown\n",
	129	phy->id);
	130	}
	131
2908d778 JB	132	/* ---------- Phy class registration ---------- */
	133
	134	int sas_register_phys(struct sas_ha_struct *sas_ha)
	135	{
	136	int i;
	137
2908d778 JB	138	/* Now register the phys. */
2908d778 JB	139	for (i = 0; i < sas_ha->num_phys; i++) {
2908d778 JB	140	struct asd_sas_phy *phy = sas_ha->sas_phy[i];
	141
	142	phy->error = 0;
ef84e289	143	atomic_set(&phy->event_nr, 0);
2908d778	144	INIT_LIST_HEAD(&phy->port_phy_el);
2908d778	145
2908d778 JB	146	phy->port = NULL;
	147	phy->ha = sas_ha;
	148	spin_lock_init(&phy->frame_rcvd_lock);
	149	spin_lock_init(&phy->sas_prim_lock);
	150	phy->frame_rcvd_size = 0;
	151
22b9153f	152	phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev, i);
2908d778 JB	153	if (!phy->phy)
	154	return -ENOMEM;
	155
	156	phy->phy->identify.initiator_port_protocols =
	157	phy->iproto;
	158	phy->phy->identify.target_port_protocols = phy->tproto;
	159	phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr);
	160	phy->phy->identify.phy_identifier = i;
a01e70e5 JB	161	phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	162	phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	163	phy->phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
	164	phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
2908d778 JB	165	phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
	166
	167	sas_phy_add(phy->phy);
	168	}
	169
	170	return 0;
	171	}
6bd9033a JY	172
	173	const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = {
	174	[PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal,
	175	[PHYE_OOB_DONE] = sas_phye_oob_done,
	176	[PHYE_OOB_ERROR] = sas_phye_oob_error,
	177	[PHYE_SPINUP_HOLD] = sas_phye_spinup_hold,
	178	[PHYE_RESUME_TIMEOUT] = sas_phye_resume_timeout,
ef84e289	179	[PHYE_SHUTDOWN] = sas_phye_shutdown,
6bd9033a	180	};