/drivers/scsi/libsas/sas_internal.h

  1/*
  2 * Serial Attached SCSI (SAS) class internal header file
  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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 22 * USA
 23 *
 24 */
 25
 26#ifndef _SAS_INTERNAL_H_
 27#define _SAS_INTERNAL_H_
 28
 29#include <scsi/scsi.h>
 30#include <scsi/scsi_host.h>
 31#include <scsi/scsi_transport_sas.h>
 32#include <scsi/libsas.h>
 33
 34#define sas_printk(fmt, ...) printk(KERN_NOTICE "sas: " fmt, ## __VA_ARGS__)
 35
 36#define SAS_DPRINTK(fmt, ...) printk(KERN_DEBUG "sas: " fmt, ## __VA_ARGS__)
 37
 38#define TO_SAS_TASK(_scsi_cmd)  ((void *)(_scsi_cmd)->host_scribble)
 39#define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
 40
 41void sas_scsi_recover_host(struct Scsi_Host *shost);
 42
 43int sas_show_class(enum sas_class class, char *buf);
 44int sas_show_proto(enum sas_protocol proto, char *buf);
 45int sas_show_linkrate(enum sas_linkrate linkrate, char *buf);
 46int sas_show_oob_mode(enum sas_oob_mode oob_mode, char *buf);
 47
 48int  sas_register_phys(struct sas_ha_struct *sas_ha);
 49void sas_unregister_phys(struct sas_ha_struct *sas_ha);
 50
 51int  sas_register_ports(struct sas_ha_struct *sas_ha);
 52void sas_unregister_ports(struct sas_ha_struct *sas_ha);
 53
 54enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *);
 55
 56int  sas_init_queue(struct sas_ha_struct *sas_ha);
 57int  sas_init_events(struct sas_ha_struct *sas_ha);
 58void sas_shutdown_queue(struct sas_ha_struct *sas_ha);
 59
 60void sas_deform_port(struct asd_sas_phy *phy, int gone);
 61
 62void sas_porte_bytes_dmaed(struct work_struct *work);
 63void sas_porte_broadcast_rcvd(struct work_struct *work);
 64void sas_porte_link_reset_err(struct work_struct *work);
 65void sas_porte_timer_event(struct work_struct *work);
 66void sas_porte_hard_reset(struct work_struct *work);
 67
 68int sas_notify_lldd_dev_found(struct domain_device *);
 69void sas_notify_lldd_dev_gone(struct domain_device *);
 70
 71int sas_smp_phy_control(struct domain_device *dev, int phy_id,
 72			enum phy_func phy_func, struct sas_phy_linkrates *);
 73int sas_smp_get_phy_events(struct sas_phy *phy);
 74
 75struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
 76
 77void sas_hae_reset(struct work_struct *work);
 78
 79#ifdef CONFIG_SCSI_SAS_HOST_SMP
 80extern int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
 81				struct request *rsp);
 82#else
 83static inline int sas_smp_host_handler(struct Scsi_Host *shost,
 84				       struct request *req,
 85				       struct request *rsp)
 86{
 87	shost_printk(KERN_ERR, shost,
 88		"Cannot send SMP to a sas host (not enabled in CONFIG)\n");
 89	return -EINVAL;
 90}
 91#endif
 92
 93static inline void sas_queue_event(int event, spinlock_t *lock,
 94				   unsigned long *pending,
 95				   struct work_struct *work,
 96				   struct sas_ha_struct *sas_ha)
 97{
 98	unsigned long flags;
 99
100	spin_lock_irqsave(lock, flags);
101	if (test_bit(event, pending)) {
102		spin_unlock_irqrestore(lock, flags);
103		return;
104	}
105	__set_bit(event, pending);
106	spin_unlock_irqrestore(lock, flags);
107
108	spin_lock_irqsave(&sas_ha->state_lock, flags);
109	if (sas_ha->state != SAS_HA_UNREGISTERED) {
110		scsi_queue_work(sas_ha->core.shost, work);
111	}
112	spin_unlock_irqrestore(&sas_ha->state_lock, flags);
113}
114
115static inline void sas_begin_event(int event, spinlock_t *lock,
116				   unsigned long *pending)
117{
118	unsigned long flags;
119
120	spin_lock_irqsave(lock, flags);
121	__clear_bit(event, pending);
122	spin_unlock_irqrestore(lock, flags);
123}
124
125static inline void sas_fill_in_rphy(struct domain_device *dev,
126				    struct sas_rphy *rphy)
127{
128	rphy->identify.sas_address = SAS_ADDR(dev->sas_addr);
129	rphy->identify.initiator_port_protocols = dev->iproto;
130	rphy->identify.target_port_protocols = dev->tproto;
131	switch (dev->dev_type) {
132	case SATA_DEV:
133		/* FIXME: need sata device type */
134	case SAS_END_DEV:
135		rphy->identify.device_type = SAS_END_DEVICE;
136		break;
137	case EDGE_DEV:
138		rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE;
139		break;
140	case FANOUT_DEV:
141		rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE;
142		break;
143	default:
144		rphy->identify.device_type = SAS_PHY_UNUSED;
145		break;
146	}
147}
148
149static inline void sas_add_parent_port(struct domain_device *dev, int phy_id)
150{
151	struct expander_device *ex = &dev->ex_dev;
152	struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
153
154	if (!ex->parent_port) {
155		ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
156		/* FIXME: error handling */
157		BUG_ON(!ex->parent_port);
158		BUG_ON(sas_port_add(ex->parent_port));
159		sas_port_mark_backlink(ex->parent_port);
160	}
161	sas_port_add_phy(ex->parent_port, ex_phy->phy);
162}
163
164#endif /* _SAS_INTERNAL_H_ */