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linux/drivers/scsi/libsas/sas_internal.h
Jens Axboe 242f9dcb8b block: unify request timeout handling 
Right now SCSI and others do their own command timeout handling.
Move those bits to the block layer.

Instead of having a timer per command, we try to be a bit more clever
and simply have one per-queue. This avoids the overhead of having to
tear down and setup a timer for each command, so it will result in a lot
less timer fiddling.

Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09 08:56:13 +02:00

168 lines
5.1 KiB
C
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/*
* Serial Attached SCSI (SAS) class internal header file
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
#ifndef _SAS_INTERNAL_H_
#define _SAS_INTERNAL_H_
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_sas.h>
#include <scsi/libsas.h>
#define sas_printk(fmt, ...) printk(KERN_NOTICE "sas: " fmt, ## __VA_ARGS__)
#ifdef SAS_DEBUG
#define SAS_DPRINTK(fmt, ...) printk(KERN_NOTICE "sas: " fmt, ## __VA_ARGS__)
#else
#define SAS_DPRINTK(fmt, ...)
#endif
#define TO_SAS_TASK(_scsi_cmd) ((void *)(_scsi_cmd)->host_scribble)
#define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
void sas_scsi_recover_host(struct Scsi_Host *shost);
int sas_show_class(enum sas_class class, char *buf);
int sas_show_proto(enum sas_protocol proto, char *buf);
int sas_show_linkrate(enum sas_linkrate linkrate, char *buf);
int sas_show_oob_mode(enum sas_oob_mode oob_mode, char *buf);
int sas_register_phys(struct sas_ha_struct *sas_ha);
void sas_unregister_phys(struct sas_ha_struct *sas_ha);
int sas_register_ports(struct sas_ha_struct *sas_ha);
void sas_unregister_ports(struct sas_ha_struct *sas_ha);
enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *);
int sas_init_queue(struct sas_ha_struct *sas_ha);
int sas_init_events(struct sas_ha_struct *sas_ha);
void sas_shutdown_queue(struct sas_ha_struct *sas_ha);
void sas_deform_port(struct asd_sas_phy *phy);
void sas_porte_bytes_dmaed(struct work_struct *work);
void sas_porte_broadcast_rcvd(struct work_struct *work);
void sas_porte_link_reset_err(struct work_struct *work);
void sas_porte_timer_event(struct work_struct *work);
void sas_porte_hard_reset(struct work_struct *work);
int sas_notify_lldd_dev_found(struct domain_device *);
void sas_notify_lldd_dev_gone(struct domain_device *);
int sas_smp_phy_control(struct domain_device *dev, int phy_id,
enum phy_func phy_func, struct sas_phy_linkrates *);
int sas_smp_get_phy_events(struct sas_phy *phy);
struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
void sas_hae_reset(struct work_struct *work);
#ifdef CONFIG_SCSI_SAS_HOST_SMP
extern int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
struct request *rsp);
#else
static inline int sas_smp_host_handler(struct Scsi_Host *shost,
struct request *req,
struct request *rsp)
{
shost_printk(KERN_ERR, shost,
"Cannot send SMP to a sas host (not enabled in CONFIG)\n");
return -EINVAL;
}
#endif
static inline void sas_queue_event(int event, spinlock_t *lock,
unsigned long *pending,
struct work_struct *work,
struct sas_ha_struct *sas_ha)
{
unsigned long flags;
spin_lock_irqsave(lock, flags);
if (test_bit(event, pending)) {
spin_unlock_irqrestore(lock, flags);
return;
}
__set_bit(event, pending);
spin_unlock_irqrestore(lock, flags);
spin_lock_irqsave(&sas_ha->state_lock, flags);
if (sas_ha->state != SAS_HA_UNREGISTERED) {
scsi_queue_work(sas_ha->core.shost, work);
}
spin_unlock_irqrestore(&sas_ha->state_lock, flags);
}
static inline void sas_begin_event(int event, spinlock_t *lock,
unsigned long *pending)
{
unsigned long flags;
spin_lock_irqsave(lock, flags);
__clear_bit(event, pending);
spin_unlock_irqrestore(lock, flags);
}
static inline void sas_fill_in_rphy(struct domain_device *dev,
struct sas_rphy *rphy)
{
rphy->identify.sas_address = SAS_ADDR(dev->sas_addr);
rphy->identify.initiator_port_protocols = dev->iproto;
rphy->identify.target_port_protocols = dev->tproto;
switch (dev->dev_type) {
case SATA_DEV:
/* FIXME: need sata device type */
case SAS_END_DEV:
rphy->identify.device_type = SAS_END_DEVICE;
break;
case EDGE_DEV:
rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE;
break;
case FANOUT_DEV:
rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE;
break;
default:
rphy->identify.device_type = SAS_PHY_UNUSED;
break;
}
}
static inline void sas_add_parent_port(struct domain_device *dev, int phy_id)
{
struct expander_device *ex = &dev->ex_dev;
struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
if (!ex->parent_port) {
ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
/* FIXME: error handling */
BUG_ON(!ex->parent_port);
BUG_ON(sas_port_add(ex->parent_port));
sas_port_mark_backlink(ex->parent_port);
}
sas_port_add_phy(ex->parent_port, ex_phy->phy);
}
#endif /* _SAS_INTERNAL_H_ */
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