[deliverable/linux.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(void *data)
{
	struct asd_sas_phy *phy = data;

	sas_begin_event(PHYE_LOSS_OF_SIGNAL, &phy->ha->event_lock,
			&phy->phy_events_pending);
	phy->error = 0;
	sas_deform_port(phy);
}

static void sas_phye_oob_done(void *data)
{
	struct asd_sas_phy *phy = data;

	sas_begin_event(PHYE_OOB_DONE, &phy->ha->event_lock,
			&phy->phy_events_pending);
	phy->error = 0;
}

static void sas_phye_oob_error(void *data)
{
	struct asd_sas_phy *phy = data;
	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_begin_event(PHYE_OOB_ERROR, &phy->ha->event_lock,
			&phy->phy_events_pending);

	sas_deform_port(phy);

	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);
			break;
		case 3:
		default:
			phy->error = 0;
			phy->enabled = 0;
			i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE);
			break;
		}
	}
}

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

	sas_begin_event(PHYE_SPINUP_HOLD, &phy->ha->event_lock,
			&phy->phy_events_pending);

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

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

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

	static void (*sas_phy_event_fns[PHY_NUM_EVENTS])(void *) = {
		[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,
	};

	static void (*sas_port_event_fns[PORT_NUM_EVENTS])(void *) = {
		[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_WORK(&phy->port_events[k], sas_port_event_fns[k],
				  phy);

		for (k = 0; k < PHY_NUM_EVENTS; k++)
			INIT_WORK(&phy->phy_events[k], sas_phy_event_fns[k],
				  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_1_5_GBPS;
		phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
		phy->phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
		phy->phy->maximum_linkrate = SAS_LINK_RATE_3_0_GBPS;
		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
	33	static void sas_phye_loss_of_signal(void *data)
	34	{
	35	struct asd_sas_phy *phy = data;
	36
	37	sas_begin_event(PHYE_LOSS_OF_SIGNAL, &phy->ha->event_lock,
	38	&phy->phy_events_pending);
	39	phy->error = 0;
	40	sas_deform_port(phy);
	41	}
	42
	43	static void sas_phye_oob_done(void *data)
	44	{
	45	struct asd_sas_phy *phy = data;
	46
	47	sas_begin_event(PHYE_OOB_DONE, &phy->ha->event_lock,
	48	&phy->phy_events_pending);
	49	phy->error = 0;
	50	}
	51
	52	static void sas_phye_oob_error(void *data)
	53	{
	54	struct asd_sas_phy *phy = data;
	55	struct sas_ha_struct *sas_ha = phy->ha;
	56	struct asd_sas_port *port = phy->port;
	57	struct sas_internal *i =
	58	to_sas_internal(sas_ha->core.shost->transportt);
	59
	60	sas_begin_event(PHYE_OOB_ERROR, &phy->ha->event_lock,
	61	&phy->phy_events_pending);
	62
	63	sas_deform_port(phy);
	64
65	if (!port && phy->enabled && i->dft->lldd_control_phy) {
66	phy->error++;
67	switch (phy->error) {
68	case 1:
69	case 2:
70	i->dft->lldd_control_phy(phy, PHY_FUNC_HARD_RESET);
71	break;
72	case 3:
73	default:
74	phy->error = 0;
75	phy->enabled = 0;
76	i->dft->lldd_control_phy(phy, PHY_FUNC_DISABLE);
77	break;
78	}
79	}
80	}
81
82	static void sas_phye_spinup_hold(void *data)
83	{
84	struct asd_sas_phy *phy = data;
85	struct sas_ha_struct *sas_ha = phy->ha;
86	struct sas_internal *i =
87	to_sas_internal(sas_ha->core.shost->transportt);
88
89	sas_begin_event(PHYE_SPINUP_HOLD, &phy->ha->event_lock,
90	&phy->phy_events_pending);
91
92	phy->error = 0;
93	i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD);
94	}
95
96	/* ---------- Phy class registration ---------- */
97
98	int sas_register_phys(struct sas_ha_struct *sas_ha)
99	{
100	int i;
101
102	static void (sas_phy_event_fns[PHY_NUM_EVENTS])(void ) = {
103	[PHYE_LOSS_OF_SIGNAL] = sas_phye_loss_of_signal,
104	[PHYE_OOB_DONE] = sas_phye_oob_done,
105	[PHYE_OOB_ERROR] = sas_phye_oob_error,
106	[PHYE_SPINUP_HOLD] = sas_phye_spinup_hold,
107	};
108
109	static void (sas_port_event_fns[PORT_NUM_EVENTS])(void ) = {
110	[PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed,
111	[PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd,
112	[PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err,
113	[PORTE_TIMER_EVENT] = sas_porte_timer_event,
114	[PORTE_HARD_RESET] = sas_porte_hard_reset,
115	};
116
117	/* Now register the phys. */
118	for (i = 0; i < sas_ha->num_phys; i++) {
119	int k;
120	struct asd_sas_phy *phy = sas_ha->sas_phy[i];
121
122	phy->error = 0;
123	INIT_LIST_HEAD(&phy->port_phy_el);
124	for (k = 0; k < PORT_NUM_EVENTS; k++)
125	INIT_WORK(&phy->port_events[k], sas_port_event_fns[k],
126	phy);
127
128	for (k = 0; k < PHY_NUM_EVENTS; k++)
129	INIT_WORK(&phy->phy_events[k], sas_phy_event_fns[k],
130	phy);
131	phy->port = NULL;
132	phy->ha = sas_ha;
133	spin_lock_init(&phy->frame_rcvd_lock);
134	spin_lock_init(&phy->sas_prim_lock);
135	phy->frame_rcvd_size = 0;
136
137	phy->phy = sas_phy_alloc(&sas_ha->core.shost->shost_gendev,
138	i);
139	if (!phy->phy)
140	return -ENOMEM;
141
142	phy->phy->identify.initiator_port_protocols =
143	phy->iproto;
144	phy->phy->identify.target_port_protocols = phy->tproto;
145	phy->phy->identify.sas_address = SAS_ADDR(sas_ha->sas_addr);
146	phy->phy->identify.phy_identifier = i;
147	phy->phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
148	phy->phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
149	phy->phy->minimum_linkrate = SAS_LINK_RATE_1_5_GBPS;
150	phy->phy->maximum_linkrate = SAS_LINK_RATE_3_0_GBPS;
151	phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
152
153	sas_phy_add(phy->phy);
154	}
155
156	return 0;
157	}