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Diffstat (limited to 'drivers/scsi/libsas/sas_port.c')
-rw-r--r--drivers/scsi/libsas/sas_port.c183
1 files changed, 99 insertions, 84 deletions
diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c
index d3c5297c6c89..de7556070048 100644
--- a/drivers/scsi/libsas/sas_port.c
+++ b/drivers/scsi/libsas/sas_port.c
@@ -1,32 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* 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"
+#include "scsi_sas_internal.h"
static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy *phy)
{
@@ -41,10 +25,10 @@ static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy
static void sas_resume_port(struct asd_sas_phy *phy)
{
- struct domain_device *dev;
+ struct domain_device *dev, *n;
struct asd_sas_port *port = phy->port;
struct sas_ha_struct *sas_ha = phy->ha;
- struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt);
+ struct sas_internal *si = to_sas_internal(sas_ha->shost->transportt);
if (si->dft->lldd_port_formed)
si->dft->lldd_port_formed(phy);
@@ -60,16 +44,17 @@ static void sas_resume_port(struct asd_sas_phy *phy)
* 1/ presume every device came back
* 2/ force the next revalidation to check all expander phys
*/
- list_for_each_entry(dev, &port->dev_list, dev_list_node) {
+ list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) {
int i, rc;
rc = sas_notify_lldd_dev_found(dev);
if (rc) {
sas_unregister_dev(port, dev);
+ sas_destruct_devices(port);
continue;
}
- if (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE || dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
+ if (dev_is_expander(dev->dev_type)) {
dev->ex_dev.ex_change_count = -1;
for (i = 0; i < dev->ex_dev.num_phys; i++) {
struct ex_phy *phy = &dev->ex_dev.ex_phy[i];
@@ -82,8 +67,35 @@ static void sas_resume_port(struct asd_sas_phy *phy)
sas_discover_event(port, DISCE_RESUME);
}
+static void sas_form_port_add_phy(struct asd_sas_port *port,
+ struct asd_sas_phy *phy, bool wideport)
+{
+ list_add_tail(&phy->port_phy_el, &port->phy_list);
+ sas_phy_set_target(phy, port->port_dev);
+ phy->port = port;
+ port->num_phys++;
+ port->phy_mask |= (1U << phy->id);
+
+ if (wideport)
+ pr_debug("phy%d matched wide port%d\n", phy->id,
+ port->id);
+ else
+ memcpy(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE);
+
+ if (*(u64 *)port->attached_sas_addr == 0) {
+ 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);
+ }
+}
+
/**
- * sas_form_port -- add this phy to a port
+ * 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
@@ -94,13 +106,14 @@ 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 domain_device *port_dev = NULL;
struct sas_internal *si =
- to_sas_internal(sas_ha->core.shost->transportt);
+ to_sas_internal(sas_ha->shost->transportt);
unsigned long flags;
if (port) {
if (!phy_is_wideport_member(port, phy))
- sas_deform_port(phy, 0);
+ sas_deform_port(phy, false);
else if (phy->suspended) {
phy->suspended = 0;
sas_resume_port(phy);
@@ -109,9 +122,9 @@ static void sas_form_port(struct asd_sas_phy *phy)
wake_up(&sas_ha->eh_wait_q);
return;
} else {
- SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n",
- __func__, phy->id, phy->port->id,
- phy->port->num_phys);
+ pr_info("%s: phy%d belongs to port%d already(%d)!\n",
+ __func__, phy->id, phy->port->id,
+ phy->port->num_phys);
return;
}
}
@@ -124,8 +137,9 @@ static void sas_form_port(struct asd_sas_phy *phy)
if (*(u64 *) port->sas_addr &&
phy_is_wideport_member(port, phy) && port->num_phys > 0) {
/* wide port */
- SAS_DPRINTK("phy%d matched wide port%d\n", phy->id,
- port->id);
+ port_dev = port->port_dev;
+ sas_form_port_add_phy(port, phy, true);
+ spin_unlock(&port->phy_list_lock);
break;
}
spin_unlock(&port->phy_list_lock);
@@ -136,40 +150,22 @@ static void sas_form_port(struct asd_sas_phy *phy)
port = sas_ha->sas_port[i];
spin_lock(&port->phy_list_lock);
if (*(u64 *)port->sas_addr == 0
- && port->num_phys == 0) {
- memcpy(port->sas_addr, phy->sas_addr,
- SAS_ADDR_SIZE);
+ && port->num_phys == 0) {
+ port_dev = port->port_dev;
+ sas_form_port_add_phy(port, phy, false);
+ spin_unlock(&port->phy_list_lock);
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;
+ if (i >= sas_ha->num_phys) {
+ pr_err("%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);
- sas_phy_set_target(phy, port->port_dev);
- phy->port = port;
- port->num_phys++;
- port->phy_mask |= (1U << phy->id);
-
- 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) {
@@ -179,34 +175,43 @@ static void sas_form_port(struct asd_sas_phy *phy)
}
sas_port_add_phy(port->port, phy->phy);
- SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n",
- dev_name(&phy->phy->dev), dev_name(&port->port->dev),
- port->phy_mask,
- SAS_ADDR(port->attached_sas_addr));
+ pr_debug("%s added to %s, phy_mask:0x%x (%016llx)\n",
+ dev_name(&phy->phy->dev), dev_name(&port->port->dev),
+ port->phy_mask,
+ SAS_ADDR(port->attached_sas_addr));
- if (port->port_dev)
- port->port_dev->pathways = port->num_phys;
+ if (port_dev)
+ 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);
+ /* Only insert a revalidate event after initial discovery */
+ if (port_dev && dev_is_expander(port_dev->dev_type)) {
+ struct expander_device *ex_dev = &port_dev->ex_dev;
+
+ ex_dev->ex_change_count = -1;
+ sas_discover_event(port, DISCE_REVALIDATE_DOMAIN);
+ }
+ flush_workqueue(sas_ha->disco_q);
}
/**
- * sas_deform_port -- remove this phy from the port it belongs to
+ * sas_deform_port - remove this phy from the port it belongs to
* @phy: the phy of interest
+ * @gone: whether or not the PHY is gone
*
* 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, int gone)
+void sas_deform_port(struct asd_sas_phy *phy, bool gone)
{
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);
+ to_sas_internal(sas_ha->shost->transportt);
struct domain_device *dev;
unsigned long flags;
@@ -219,6 +224,7 @@ void sas_deform_port(struct asd_sas_phy *phy, int gone)
if (port->num_phys == 1) {
sas_unregister_domain_devices(port, gone);
+ sas_destruct_devices(port);
sas_port_delete(port->port);
port->port = NULL;
} else {
@@ -242,7 +248,6 @@ void sas_deform_port(struct asd_sas_phy *phy, int gone)
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;
@@ -251,6 +256,15 @@ void sas_deform_port(struct asd_sas_phy *phy, int gone)
spin_unlock(&port->phy_list_lock);
spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
+ /* Only insert revalidate event if the port still has members */
+ if (port->port && dev && dev_is_expander(dev->dev_type)) {
+ struct expander_device *ex_dev = &dev->ex_dev;
+
+ ex_dev->ex_change_count = -1;
+ sas_discover_event(port, DISCE_REVALIDATE_DOMAIN);
+ }
+ flush_workqueue(sas_ha->disco_q);
+
return;
}
@@ -261,8 +275,6 @@ void sas_porte_bytes_dmaed(struct work_struct *work)
struct asd_sas_event *ev = to_asd_sas_event(work);
struct asd_sas_phy *phy = ev->phy;
- clear_bit(PORTE_BYTES_DMAED, &phy->port_events_pending);
-
sas_form_port(phy);
}
@@ -273,14 +285,15 @@ void sas_porte_broadcast_rcvd(struct work_struct *work)
unsigned long flags;
u32 prim;
- clear_bit(PORTE_BROADCAST_RCVD, &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);
+ pr_debug("broadcast received: %d\n", prim);
sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);
+
+ if (phy->port)
+ flush_workqueue(phy->port->ha->disco_q);
}
void sas_porte_link_reset_err(struct work_struct *work)
@@ -288,9 +301,7 @@ void sas_porte_link_reset_err(struct work_struct *work)
struct asd_sas_event *ev = to_asd_sas_event(work);
struct asd_sas_phy *phy = ev->phy;
- clear_bit(PORTE_LINK_RESET_ERR, &phy->port_events_pending);
-
- sas_deform_port(phy, 1);
+ sas_deform_port(phy, true);
}
void sas_porte_timer_event(struct work_struct *work)
@@ -298,9 +309,7 @@ void sas_porte_timer_event(struct work_struct *work)
struct asd_sas_event *ev = to_asd_sas_event(work);
struct asd_sas_phy *phy = ev->phy;
- clear_bit(PORTE_TIMER_EVENT, &phy->port_events_pending);
-
- sas_deform_port(phy, 1);
+ sas_deform_port(phy, true);
}
void sas_porte_hard_reset(struct work_struct *work)
@@ -308,9 +317,7 @@ void sas_porte_hard_reset(struct work_struct *work)
struct asd_sas_event *ev = to_asd_sas_event(work);
struct asd_sas_phy *phy = ev->phy;
- clear_bit(PORTE_HARD_RESET, &phy->port_events_pending);
-
- sas_deform_port(phy, 1);
+ sas_deform_port(phy, true);
}
/* ---------- SAS port registration ---------- */
@@ -323,6 +330,7 @@ static void sas_init_port(struct asd_sas_port *port,
INIT_LIST_HEAD(&port->dev_list);
INIT_LIST_HEAD(&port->disco_list);
INIT_LIST_HEAD(&port->destroy_list);
+ INIT_LIST_HEAD(&port->sas_port_del_list);
spin_lock_init(&port->phy_list_lock);
INIT_LIST_HEAD(&port->phy_list);
port->ha = sas_ha;
@@ -350,6 +358,13 @@ void sas_unregister_ports(struct sas_ha_struct *sas_ha)
for (i = 0; i < sas_ha->num_phys; i++)
if (sas_ha->sas_phy[i]->port)
- sas_deform_port(sas_ha->sas_phy[i], 0);
-
+ sas_deform_port(sas_ha->sas_phy[i], false);
}
+
+const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = {
+ [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,
+};
generated by cgit (git 2.34.1) at 2025-12-25 01:41:52 +0000