![Harvey Harrison](/assets/img/avatar_default.png)
[jejb: fixed up a ton of missed conversions. All of you are on notice this has happened, driver trees will now need to be rebased] Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: SCSI List <linux-scsi@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
293 lines
7.6 KiB
C
293 lines
7.6 KiB
C
/*
|
|
* Serial Attached SCSI (SAS) Port 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_transport.h>
|
|
#include <scsi/scsi_transport_sas.h>
|
|
#include "../scsi_sas_internal.h"
|
|
|
|
/**
|
|
* sas_form_port -- add this phy to a port
|
|
* @phy: the phy of interest
|
|
*
|
|
* This function adds this phy to an existing port, thus creating a wide
|
|
* port, or it creates a port and adds the phy to the port.
|
|
*/
|
|
static void sas_form_port(struct asd_sas_phy *phy)
|
|
{
|
|
int i;
|
|
struct sas_ha_struct *sas_ha = phy->ha;
|
|
struct asd_sas_port *port = phy->port;
|
|
struct sas_internal *si =
|
|
to_sas_internal(sas_ha->core.shost->transportt);
|
|
unsigned long flags;
|
|
|
|
if (port) {
|
|
if (memcmp(port->attached_sas_addr, phy->attached_sas_addr,
|
|
SAS_ADDR_SIZE) != 0)
|
|
sas_deform_port(phy);
|
|
else {
|
|
SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n",
|
|
__func__, phy->id, phy->port->id,
|
|
phy->port->num_phys);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* find a port */
|
|
spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
|
|
for (i = 0; i < sas_ha->num_phys; i++) {
|
|
port = sas_ha->sas_port[i];
|
|
spin_lock(&port->phy_list_lock);
|
|
if (*(u64 *) port->sas_addr &&
|
|
memcmp(port->attached_sas_addr,
|
|
phy->attached_sas_addr, SAS_ADDR_SIZE) == 0 &&
|
|
port->num_phys > 0) {
|
|
/* wide port */
|
|
SAS_DPRINTK("phy%d matched wide port%d\n", phy->id,
|
|
port->id);
|
|
break;
|
|
} else if (*(u64 *) port->sas_addr == 0 && port->num_phys==0) {
|
|
memcpy(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE);
|
|
break;
|
|
}
|
|
spin_unlock(&port->phy_list_lock);
|
|
}
|
|
|
|
if (i >= sas_ha->num_phys) {
|
|
printk(KERN_NOTICE "%s: couldn't find a free port, bug?\n",
|
|
__func__);
|
|
spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
|
|
return;
|
|
}
|
|
|
|
/* add the phy to the port */
|
|
list_add_tail(&phy->port_phy_el, &port->phy_list);
|
|
phy->port = port;
|
|
port->num_phys++;
|
|
port->phy_mask |= (1U << phy->id);
|
|
|
|
if (!port->phy)
|
|
port->phy = phy->phy;
|
|
|
|
if (*(u64 *)port->attached_sas_addr == 0) {
|
|
port->class = phy->class;
|
|
memcpy(port->attached_sas_addr, phy->attached_sas_addr,
|
|
SAS_ADDR_SIZE);
|
|
port->iproto = phy->iproto;
|
|
port->tproto = phy->tproto;
|
|
port->oob_mode = phy->oob_mode;
|
|
port->linkrate = phy->linkrate;
|
|
} else
|
|
port->linkrate = max(port->linkrate, phy->linkrate);
|
|
spin_unlock(&port->phy_list_lock);
|
|
spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
|
|
|
|
if (!port->port) {
|
|
port->port = sas_port_alloc(phy->phy->dev.parent, port->id);
|
|
BUG_ON(!port->port);
|
|
sas_port_add(port->port);
|
|
}
|
|
sas_port_add_phy(port->port, phy->phy);
|
|
|
|
SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n",
|
|
phy->phy->dev.bus_id,port->port->dev.bus_id,
|
|
port->phy_mask,
|
|
SAS_ADDR(port->attached_sas_addr));
|
|
|
|
if (port->port_dev)
|
|
port->port_dev->pathways = port->num_phys;
|
|
|
|
/* Tell the LLDD about this port formation. */
|
|
if (si->dft->lldd_port_formed)
|
|
si->dft->lldd_port_formed(phy);
|
|
|
|
sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN);
|
|
}
|
|
|
|
/**
|
|
* sas_deform_port -- remove this phy from the port it belongs to
|
|
* @phy: the phy of interest
|
|
*
|
|
* This is called when the physical link to the other phy has been
|
|
* lost (on this phy), in Event thread context. We cannot delay here.
|
|
*/
|
|
void sas_deform_port(struct asd_sas_phy *phy)
|
|
{
|
|
struct sas_ha_struct *sas_ha = phy->ha;
|
|
struct asd_sas_port *port = phy->port;
|
|
struct sas_internal *si =
|
|
to_sas_internal(sas_ha->core.shost->transportt);
|
|
unsigned long flags;
|
|
|
|
if (!port)
|
|
return; /* done by a phy event */
|
|
|
|
if (port->port_dev)
|
|
port->port_dev->pathways--;
|
|
|
|
if (port->num_phys == 1) {
|
|
sas_unregister_domain_devices(port);
|
|
sas_port_delete(port->port);
|
|
port->port = NULL;
|
|
} else
|
|
sas_port_delete_phy(port->port, phy->phy);
|
|
|
|
|
|
if (si->dft->lldd_port_deformed)
|
|
si->dft->lldd_port_deformed(phy);
|
|
|
|
spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
|
|
spin_lock(&port->phy_list_lock);
|
|
|
|
list_del_init(&phy->port_phy_el);
|
|
phy->port = NULL;
|
|
port->num_phys--;
|
|
port->phy_mask &= ~(1U << phy->id);
|
|
|
|
if (port->num_phys == 0) {
|
|
INIT_LIST_HEAD(&port->phy_list);
|
|
memset(port->sas_addr, 0, SAS_ADDR_SIZE);
|
|
memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE);
|
|
port->class = 0;
|
|
port->iproto = 0;
|
|
port->tproto = 0;
|
|
port->oob_mode = 0;
|
|
port->phy_mask = 0;
|
|
}
|
|
spin_unlock(&port->phy_list_lock);
|
|
spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
|
|
|
|
return;
|
|
}
|
|
|
|
/* ---------- SAS port events ---------- */
|
|
|
|
void sas_porte_bytes_dmaed(struct work_struct *work)
|
|
{
|
|
struct asd_sas_event *ev =
|
|
container_of(work, struct asd_sas_event, work);
|
|
struct asd_sas_phy *phy = ev->phy;
|
|
|
|
sas_begin_event(PORTE_BYTES_DMAED, &phy->ha->event_lock,
|
|
&phy->port_events_pending);
|
|
|
|
sas_form_port(phy);
|
|
}
|
|
|
|
void sas_porte_broadcast_rcvd(struct work_struct *work)
|
|
{
|
|
struct asd_sas_event *ev =
|
|
container_of(work, struct asd_sas_event, work);
|
|
struct asd_sas_phy *phy = ev->phy;
|
|
unsigned long flags;
|
|
u32 prim;
|
|
|
|
sas_begin_event(PORTE_BROADCAST_RCVD, &phy->ha->event_lock,
|
|
&phy->port_events_pending);
|
|
|
|
spin_lock_irqsave(&phy->sas_prim_lock, flags);
|
|
prim = phy->sas_prim;
|
|
spin_unlock_irqrestore(&phy->sas_prim_lock, flags);
|
|
|
|
SAS_DPRINTK("broadcast received: %d\n", prim);
|
|
sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);
|
|
}
|
|
|
|
void sas_porte_link_reset_err(struct work_struct *work)
|
|
{
|
|
struct asd_sas_event *ev =
|
|
container_of(work, struct asd_sas_event, work);
|
|
struct asd_sas_phy *phy = ev->phy;
|
|
|
|
sas_begin_event(PORTE_LINK_RESET_ERR, &phy->ha->event_lock,
|
|
&phy->port_events_pending);
|
|
|
|
sas_deform_port(phy);
|
|
}
|
|
|
|
void sas_porte_timer_event(struct work_struct *work)
|
|
{
|
|
struct asd_sas_event *ev =
|
|
container_of(work, struct asd_sas_event, work);
|
|
struct asd_sas_phy *phy = ev->phy;
|
|
|
|
sas_begin_event(PORTE_TIMER_EVENT, &phy->ha->event_lock,
|
|
&phy->port_events_pending);
|
|
|
|
sas_deform_port(phy);
|
|
}
|
|
|
|
void sas_porte_hard_reset(struct work_struct *work)
|
|
{
|
|
struct asd_sas_event *ev =
|
|
container_of(work, struct asd_sas_event, work);
|
|
struct asd_sas_phy *phy = ev->phy;
|
|
|
|
sas_begin_event(PORTE_HARD_RESET, &phy->ha->event_lock,
|
|
&phy->port_events_pending);
|
|
|
|
sas_deform_port(phy);
|
|
}
|
|
|
|
/* ---------- SAS port registration ---------- */
|
|
|
|
static void sas_init_port(struct asd_sas_port *port,
|
|
struct sas_ha_struct *sas_ha, int i)
|
|
{
|
|
memset(port, 0, sizeof(*port));
|
|
port->id = i;
|
|
INIT_LIST_HEAD(&port->dev_list);
|
|
spin_lock_init(&port->phy_list_lock);
|
|
INIT_LIST_HEAD(&port->phy_list);
|
|
port->ha = sas_ha;
|
|
|
|
spin_lock_init(&port->dev_list_lock);
|
|
}
|
|
|
|
int sas_register_ports(struct sas_ha_struct *sas_ha)
|
|
{
|
|
int i;
|
|
|
|
/* initialize the ports and discovery */
|
|
for (i = 0; i < sas_ha->num_phys; i++) {
|
|
struct asd_sas_port *port = sas_ha->sas_port[i];
|
|
|
|
sas_init_port(port, sas_ha, i);
|
|
sas_init_disc(&port->disc, port);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void sas_unregister_ports(struct sas_ha_struct *sas_ha)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sas_ha->num_phys; i++)
|
|
if (sas_ha->sas_phy[i]->port)
|
|
sas_deform_port(sas_ha->sas_phy[i]);
|
|
|
|
}
|