From 735f7d2fedf57380214221be7bed7f62d729e262 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 17 Nov 2011 17:59:47 -0800 Subject: [SCSI] libsas: fix domain_device leak Arrange for the deallocation of a struct domain_device object when it no longer has: 1/ any children 2/ references by any scsi_targets 3/ references by a lldd The comment about domain_device lifetime in Documentation/scsi/libsas.txt is stale as it appears mainline never had a version of a struct domain_device that was registered as a kobject. We now manage domain_device reference counts on behalf of external agents. Reviewed-by: Jack Wang Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_internal.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 14e21b5fb8ba..0d43408196f9 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -76,6 +76,8 @@ struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy); void sas_hae_reset(struct work_struct *work); +void sas_free_device(struct kref *kref); + #ifdef CONFIG_SCSI_SAS_HOST_SMP extern int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req, struct request *rsp); @@ -161,4 +163,21 @@ static inline void sas_add_parent_port(struct domain_device *dev, int phy_id) sas_port_add_phy(ex->parent_port, ex_phy->phy); } +static inline struct domain_device *sas_alloc_device(void) +{ + struct domain_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL); + + if (dev) { + INIT_LIST_HEAD(&dev->siblings); + INIT_LIST_HEAD(&dev->dev_list_node); + kref_init(&dev->kref); + } + return dev; +} + +static inline void sas_put_device(struct domain_device *dev) +{ + kref_put(&dev->kref, sas_free_device); +} + #endif /* _SAS_INTERNAL_H_ */ -- cgit v1.2.3-59-g8ed1b From b15ebe0b5d0b95aeb1d84cae3649df1e0e065e9b Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 17 Nov 2011 17:59:49 -0800 Subject: [SCSI] libsas: replace event locks with atomic bitops The locks only served to make sure the pending event bitmask was updated consistently. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_discover.c | 10 +++------- drivers/scsi/libsas/sas_event.c | 8 +++----- drivers/scsi/libsas/sas_init.c | 3 +-- drivers/scsi/libsas/sas_internal.h | 32 +++++++------------------------- drivers/scsi/libsas/sas_phy.c | 12 ++++-------- drivers/scsi/libsas/sas_port.c | 15 +++++---------- include/scsi/libsas.h | 3 --- 7 files changed, 23 insertions(+), 60 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index dc52b1fa218e..ed041189e764 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -295,8 +295,7 @@ static void sas_discover_domain(struct work_struct *work) container_of(work, struct sas_discovery_event, work); struct asd_sas_port *port = ev->port; - sas_begin_event(DISCE_DISCOVER_DOMAIN, &port->disc.disc_event_lock, - &port->disc.pending); + clear_bit(DISCE_DISCOVER_DOMAIN, &port->disc.pending); if (port->port_dev) return; @@ -355,8 +354,7 @@ static void sas_revalidate_domain(struct work_struct *work) container_of(work, struct sas_discovery_event, work); struct asd_sas_port *port = ev->port; - sas_begin_event(DISCE_REVALIDATE_DOMAIN, &port->disc.disc_event_lock, - &port->disc.pending); + clear_bit(DISCE_REVALIDATE_DOMAIN, &port->disc.pending); SAS_DPRINTK("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id, task_pid_nr(current)); @@ -379,8 +377,7 @@ int sas_discover_event(struct asd_sas_port *port, enum discover_event ev) BUG_ON(ev >= DISC_NUM_EVENTS); - sas_queue_event(ev, &disc->disc_event_lock, &disc->pending, - &disc->disc_work[ev].work, port->ha); + sas_queue_event(ev, &disc->pending, &disc->disc_work[ev].work, port->ha); return 0; } @@ -400,7 +397,6 @@ void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *port) [DISCE_REVALIDATE_DOMAIN] = sas_revalidate_domain, }; - spin_lock_init(&disc->disc_event_lock); disc->pending = 0; for (i = 0; i < DISC_NUM_EVENTS; i++) { INIT_WORK(&disc->disc_work[i].work, sas_event_fns[i]); diff --git a/drivers/scsi/libsas/sas_event.c b/drivers/scsi/libsas/sas_event.c index 9db30fb5caf2..9c084bc09bbd 100644 --- a/drivers/scsi/libsas/sas_event.c +++ b/drivers/scsi/libsas/sas_event.c @@ -30,7 +30,7 @@ static void notify_ha_event(struct sas_ha_struct *sas_ha, enum ha_event event) { BUG_ON(event >= HA_NUM_EVENTS); - sas_queue_event(event, &sas_ha->event_lock, &sas_ha->pending, + sas_queue_event(event, &sas_ha->pending, &sas_ha->ha_events[event].work, sas_ha); } @@ -40,7 +40,7 @@ static void notify_port_event(struct asd_sas_phy *phy, enum port_event event) BUG_ON(event >= PORT_NUM_EVENTS); - sas_queue_event(event, &ha->event_lock, &phy->port_events_pending, + sas_queue_event(event, &phy->port_events_pending, &phy->port_events[event].work, ha); } @@ -50,7 +50,7 @@ static void notify_phy_event(struct asd_sas_phy *phy, enum phy_event event) BUG_ON(event >= PHY_NUM_EVENTS); - sas_queue_event(event, &ha->event_lock, &phy->phy_events_pending, + sas_queue_event(event, &phy->phy_events_pending, &phy->phy_events[event].work, ha); } @@ -62,8 +62,6 @@ int sas_init_events(struct sas_ha_struct *sas_ha) int i; - spin_lock_init(&sas_ha->event_lock); - for (i = 0; i < HA_NUM_EVENTS; i++) { INIT_WORK(&sas_ha->ha_events[i].work, sas_ha_event_fns[i]); sas_ha->ha_events[i].ha = sas_ha; diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index d81c3b1989f7..a435876f1f77 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -97,8 +97,7 @@ void sas_hae_reset(struct work_struct *work) container_of(work, struct sas_ha_event, work); struct sas_ha_struct *ha = ev->ha; - sas_begin_event(HAE_RESET, &ha->event_lock, - &ha->pending); + clear_bit(HAE_RESET, &ha->pending); } int sas_register_ha(struct sas_ha_struct *sas_ha) diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 0d43408196f9..7fe4eded2866 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -92,36 +92,18 @@ static inline int sas_smp_host_handler(struct Scsi_Host *shost, } #endif -static inline void sas_queue_event(int event, spinlock_t *lock, - unsigned long *pending, +static inline void sas_queue_event(int event, unsigned long *pending, struct work_struct *work, struct sas_ha_struct *sas_ha) { - unsigned long flags; + if (!test_and_set_bit(event, pending)) { + unsigned long flags; - spin_lock_irqsave(lock, flags); - if (test_bit(event, pending)) { - spin_unlock_irqrestore(lock, flags); - return; + 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); } - __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, diff --git a/drivers/scsi/libsas/sas_phy.c b/drivers/scsi/libsas/sas_phy.c index e0f5018e9071..dcfd4a9105c5 100644 --- a/drivers/scsi/libsas/sas_phy.c +++ b/drivers/scsi/libsas/sas_phy.c @@ -36,8 +36,7 @@ static void sas_phye_loss_of_signal(struct work_struct *work) container_of(work, struct asd_sas_event, work); struct asd_sas_phy *phy = ev->phy; - sas_begin_event(PHYE_LOSS_OF_SIGNAL, &phy->ha->event_lock, - &phy->phy_events_pending); + clear_bit(PHYE_LOSS_OF_SIGNAL, &phy->phy_events_pending); phy->error = 0; sas_deform_port(phy, 1); } @@ -48,8 +47,7 @@ static void sas_phye_oob_done(struct work_struct *work) container_of(work, struct asd_sas_event, work); struct asd_sas_phy *phy = ev->phy; - sas_begin_event(PHYE_OOB_DONE, &phy->ha->event_lock, - &phy->phy_events_pending); + clear_bit(PHYE_OOB_DONE, &phy->phy_events_pending); phy->error = 0; } @@ -63,8 +61,7 @@ static void sas_phye_oob_error(struct work_struct *work) 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); + clear_bit(PHYE_OOB_ERROR, &phy->phy_events_pending); sas_deform_port(phy, 1); @@ -95,8 +92,7 @@ static void sas_phye_spinup_hold(struct work_struct *work) 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); + clear_bit(PHYE_SPINUP_HOLD, &phy->phy_events_pending); phy->error = 0; i->dft->lldd_control_phy(phy, PHY_FUNC_RELEASE_SPINUP_HOLD, NULL); diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c index 42fd1f25b664..a47c7a75327b 100644 --- a/drivers/scsi/libsas/sas_port.c +++ b/drivers/scsi/libsas/sas_port.c @@ -213,8 +213,7 @@ void sas_porte_bytes_dmaed(struct work_struct *work) 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); + clear_bit(PORTE_BYTES_DMAED, &phy->port_events_pending); sas_form_port(phy); } @@ -227,8 +226,7 @@ void sas_porte_broadcast_rcvd(struct work_struct *work) unsigned long flags; u32 prim; - sas_begin_event(PORTE_BROADCAST_RCVD, &phy->ha->event_lock, - &phy->port_events_pending); + clear_bit(PORTE_BROADCAST_RCVD, &phy->port_events_pending); spin_lock_irqsave(&phy->sas_prim_lock, flags); prim = phy->sas_prim; @@ -244,8 +242,7 @@ void sas_porte_link_reset_err(struct work_struct *work) 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); + clear_bit(PORTE_LINK_RESET_ERR, &phy->port_events_pending); sas_deform_port(phy, 1); } @@ -256,8 +253,7 @@ void sas_porte_timer_event(struct work_struct *work) 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); + clear_bit(PORTE_TIMER_EVENT, &phy->port_events_pending); sas_deform_port(phy, 1); } @@ -268,8 +264,7 @@ void sas_porte_hard_reset(struct work_struct *work) 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); + clear_bit(PORTE_HARD_RESET, &phy->port_events_pending); sas_deform_port(phy, 1); } diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 7ecb5c1c0851..de63a664b5e5 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -215,7 +215,6 @@ struct sas_discovery_event { }; struct sas_discovery { - spinlock_t disc_event_lock; struct sas_discovery_event disc_work[DISC_NUM_EVENTS]; unsigned long pending; u8 fanout_sas_addr[8]; @@ -272,7 +271,6 @@ struct asd_sas_event { */ struct asd_sas_phy { /* private: */ - /* protected by ha->event_lock */ struct asd_sas_event port_events[PORT_NUM_EVENTS]; struct asd_sas_event phy_events[PHY_NUM_EVENTS]; @@ -337,7 +335,6 @@ enum sas_ha_state { struct sas_ha_struct { /* private: */ - spinlock_t event_lock; struct sas_ha_event ha_events[HA_NUM_EVENTS]; unsigned long pending; -- cgit v1.2.3-59-g8ed1b From f8daa6e6d83f60a721752cb53433bfdc1503b45f Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Mon, 19 Dec 2011 17:02:25 -0800 Subject: [SCSI] libsas: convert ha->state to flags In preparation for adding new states (SAS_HA_DRAINING, SAS_HA_FROZEN), convert ha->state into a set of flags. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_init.c | 4 ++-- drivers/scsi/libsas/sas_internal.h | 2 +- include/scsi/libsas.h | 3 +-- 3 files changed, 4 insertions(+), 5 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index a435876f1f77..da244e68fe6f 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -112,7 +112,7 @@ int sas_register_ha(struct sas_ha_struct *sas_ha) else if (sas_ha->lldd_queue_size == -1) sas_ha->lldd_queue_size = 128; /* Sanity */ - sas_ha->state = SAS_HA_REGISTERED; + set_bit(SAS_HA_REGISTERED, &sas_ha->state); spin_lock_init(&sas_ha->state_lock); error = sas_register_phys(sas_ha); @@ -160,7 +160,7 @@ int sas_unregister_ha(struct sas_ha_struct *sas_ha) /* Set the state to unregistered to avoid further * events to be queued */ spin_lock_irqsave(&sas_ha->state_lock, flags); - sas_ha->state = SAS_HA_UNREGISTERED; + clear_bit(SAS_HA_REGISTERED, &sas_ha->state); spin_unlock_irqrestore(&sas_ha->state_lock, flags); scsi_flush_work(sas_ha->core.shost); diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 7fe4eded2866..1fd84b3f091f 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -100,7 +100,7 @@ static inline void sas_queue_event(int event, unsigned long *pending, unsigned long flags; spin_lock_irqsave(&sas_ha->state_lock, flags); - if (sas_ha->state != SAS_HA_UNREGISTERED) + if (test_bit(SAS_HA_REGISTERED, &sas_ha->state)) scsi_queue_work(sas_ha->core.shost, work); spin_unlock_irqrestore(&sas_ha->state_lock, flags); } diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index de63a664b5e5..8e402d5a0640 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -330,7 +330,6 @@ struct sas_ha_event { enum sas_ha_state { SAS_HA_REGISTERED, - SAS_HA_UNREGISTERED }; struct sas_ha_struct { @@ -338,7 +337,7 @@ struct sas_ha_struct { struct sas_ha_event ha_events[HA_NUM_EVENTS]; unsigned long pending; - enum sas_ha_state state; + unsigned long state; spinlock_t state_lock; struct scsi_core core; -- cgit v1.2.3-59-g8ed1b From b1124cd3ec97406c767b90bf7e93ecd2d2915592 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Mon, 19 Dec 2011 16:42:34 -0800 Subject: [SCSI] libsas: introduce sas_drain_work() When an lldd invokes ->notify_port_event() it can trigger a chain of libsas events to: 1/ form the port and find the direct attached device 2/ if the attached device is an expander perform domain discovery A call to flush_workqueue() will only flush the initial port formation work. Currently libsas users need to call scsi_flush_work() up to the max depth of chain (which will grow from 2 to 3 when ata discovery is moved to its own discovery event). Instead of open coding multiple calls switch to use drain_workqueue() to flush sas work. drain_workqueue() does not handle new work submitted during the drain so libsas needs a bit of infrastructure to hold off unchained work submissions while a drain is in flight. A lldd ->notify() event is considered 'unchained' while a sas_discover_event() is 'chained'. As Tejun notes: "For now, I think it would be best to add private wrapper in libsas to support deferring unchained work items while draining." Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/aic94xx/aic94xx_init.c | 2 +- drivers/scsi/isci/host.c | 8 ++---- drivers/scsi/libsas/sas_discover.c | 21 +++++++++++++- drivers/scsi/libsas/sas_event.c | 55 +++++++++++++++++++++++++++++++++++++ drivers/scsi/libsas/sas_init.c | 9 ++++-- drivers/scsi/libsas/sas_internal.h | 14 ---------- drivers/scsi/mvsas/mv_sas.c | 2 +- drivers/scsi/pm8001/pm8001_sas.c | 4 ++- include/scsi/libsas.h | 4 +++ 9 files changed, 93 insertions(+), 26 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/aic94xx/aic94xx_init.c b/drivers/scsi/aic94xx/aic94xx_init.c index 8db4e727628a..2b3717f6d22c 100644 --- a/drivers/scsi/aic94xx/aic94xx_init.c +++ b/drivers/scsi/aic94xx/aic94xx_init.c @@ -971,7 +971,7 @@ static int asd_scan_finished(struct Scsi_Host *shost, unsigned long time) if (time < HZ) return 0; /* Wait for discovery to finish */ - scsi_flush_work(shost); + sas_drain_work(SHOST_TO_SAS_HA(shost)); return 1; } diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c index 508aa8ce25b4..e3cf3832c5b6 100644 --- a/drivers/scsi/isci/host.c +++ b/drivers/scsi/isci/host.c @@ -650,15 +650,13 @@ static void isci_host_start_complete(struct isci_host *ihost, enum sci_status co int isci_host_scan_finished(struct Scsi_Host *shost, unsigned long time) { - struct isci_host *ihost = SHOST_TO_SAS_HA(shost)->lldd_ha; + struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); + struct isci_host *ihost = ha->lldd_ha; if (test_bit(IHOST_START_PENDING, &ihost->flags)) return 0; - /* todo: use sas_flush_discovery once it is upstream */ - scsi_flush_work(shost); - - scsi_flush_work(shost); + sas_drain_work(ha); dev_dbg(&ihost->pdev->dev, "%s: ihost->status = %d, time = %ld\n", diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index ed041189e764..32e011766046 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -367,6 +367,25 @@ static void sas_revalidate_domain(struct work_struct *work) /* ---------- Events ---------- */ +static void sas_chain_work(struct sas_ha_struct *ha, struct work_struct *work) +{ + /* chained work is not subject to SA_HA_DRAINING or SAS_HA_REGISTERED */ + scsi_queue_work(ha->core.shost, work); +} + +static void sas_chain_event(int event, unsigned long *pending, + struct work_struct *work, + struct sas_ha_struct *ha) +{ + if (!test_and_set_bit(event, pending)) { + unsigned long flags; + + spin_lock_irqsave(&ha->state_lock, flags); + sas_chain_work(ha, work); + spin_unlock_irqrestore(&ha->state_lock, flags); + } +} + int sas_discover_event(struct asd_sas_port *port, enum discover_event ev) { struct sas_discovery *disc; @@ -377,7 +396,7 @@ int sas_discover_event(struct asd_sas_port *port, enum discover_event ev) BUG_ON(ev >= DISC_NUM_EVENTS); - sas_queue_event(ev, &disc->pending, &disc->disc_work[ev].work, port->ha); + sas_chain_event(ev, &disc->pending, &disc->disc_work[ev].work, port->ha); return 0; } diff --git a/drivers/scsi/libsas/sas_event.c b/drivers/scsi/libsas/sas_event.c index 9c084bc09bbd..e5035aa4c2a6 100644 --- a/drivers/scsi/libsas/sas_event.c +++ b/drivers/scsi/libsas/sas_event.c @@ -22,10 +22,65 @@ * */ +#include #include #include "sas_internal.h" #include "sas_dump.h" +static void sas_queue_work(struct sas_ha_struct *ha, struct work_struct *work) +{ + if (!test_bit(SAS_HA_REGISTERED, &ha->state)) + return; + + if (test_bit(SAS_HA_DRAINING, &ha->state)) + list_add(&work->entry, &ha->defer_q); + else + scsi_queue_work(ha->core.shost, work); +} + +static void sas_queue_event(int event, unsigned long *pending, + struct work_struct *work, + struct sas_ha_struct *ha) +{ + if (!test_and_set_bit(event, pending)) { + unsigned long flags; + + spin_lock_irqsave(&ha->state_lock, flags); + sas_queue_work(ha, work); + spin_unlock_irqrestore(&ha->state_lock, flags); + } +} + +int sas_drain_work(struct sas_ha_struct *ha) +{ + struct workqueue_struct *wq = ha->core.shost->work_q; + struct work_struct *w, *_w; + int err; + + err = mutex_lock_interruptible(&ha->drain_mutex); + if (err) + return err; + + set_bit(SAS_HA_DRAINING, &ha->state); + /* flush submitters */ + spin_lock_irq(&ha->state_lock); + spin_unlock_irq(&ha->state_lock); + + drain_workqueue(wq); + + spin_lock_irq(&ha->state_lock); + clear_bit(SAS_HA_DRAINING, &ha->state); + list_for_each_entry_safe(w, _w, &ha->defer_q, entry) { + list_del_init(&w->entry); + sas_queue_work(ha, w); + } + spin_unlock_irq(&ha->state_lock); + mutex_unlock(&ha->drain_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(sas_drain_work); + static void notify_ha_event(struct sas_ha_struct *sas_ha, enum ha_event event) { BUG_ON(event >= HA_NUM_EVENTS); diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index da244e68fe6f..572b943d7603 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -114,6 +114,8 @@ int sas_register_ha(struct sas_ha_struct *sas_ha) set_bit(SAS_HA_REGISTERED, &sas_ha->state); spin_lock_init(&sas_ha->state_lock); + mutex_init(&sas_ha->drain_mutex); + INIT_LIST_HEAD(&sas_ha->defer_q); error = sas_register_phys(sas_ha); if (error) { @@ -157,12 +159,13 @@ int sas_unregister_ha(struct sas_ha_struct *sas_ha) { unsigned long flags; - /* Set the state to unregistered to avoid further - * events to be queued */ + /* Set the state to unregistered to avoid further unchained + * events to be queued + */ spin_lock_irqsave(&sas_ha->state_lock, flags); clear_bit(SAS_HA_REGISTERED, &sas_ha->state); spin_unlock_irqrestore(&sas_ha->state_lock, flags); - scsi_flush_work(sas_ha->core.shost); + sas_drain_work(sas_ha); sas_unregister_ports(sas_ha); diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 1fd84b3f091f..948ea64cc2eb 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -92,20 +92,6 @@ static inline int sas_smp_host_handler(struct Scsi_Host *shost, } #endif -static inline void sas_queue_event(int event, unsigned long *pending, - struct work_struct *work, - struct sas_ha_struct *sas_ha) -{ - if (!test_and_set_bit(event, pending)) { - unsigned long flags; - - spin_lock_irqsave(&sas_ha->state_lock, flags); - if (test_bit(SAS_HA_REGISTERED, &sas_ha->state)) - scsi_queue_work(sas_ha->core.shost, work); - spin_unlock_irqrestore(&sas_ha->state_lock, flags); - } -} - static inline void sas_fill_in_rphy(struct domain_device *dev, struct sas_rphy *rphy) { diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index a4884a57cf79..b118e632bc7d 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -308,7 +308,7 @@ int mvs_scan_finished(struct Scsi_Host *shost, unsigned long time) if (mvs_prv->scan_finished == 0) return 0; - scsi_flush_work(shost); + sas_drain_work(sha); return 1; } diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index 9589fc941a8b..50837933a1e5 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -256,12 +256,14 @@ void pm8001_scan_start(struct Scsi_Host *shost) int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time) { + struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); + /* give the phy enabling interrupt event time to come in (1s * is empirically about all it takes) */ if (time < HZ) return 0; /* Wait for discovery to finish */ - scsi_flush_work(shost); + sas_drain_work(ha); return 1; } diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 8e402d5a0640..42900fa95a03 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -330,6 +330,7 @@ struct sas_ha_event { enum sas_ha_state { SAS_HA_REGISTERED, + SAS_HA_DRAINING, }; struct sas_ha_struct { @@ -337,6 +338,8 @@ struct sas_ha_struct { struct sas_ha_event ha_events[HA_NUM_EVENTS]; unsigned long pending; + struct list_head defer_q; /* work queued while draining */ + struct mutex drain_mutex; unsigned long state; spinlock_t state_lock; @@ -657,6 +660,7 @@ int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd); extern void sas_target_destroy(struct scsi_target *); extern int sas_slave_alloc(struct scsi_device *); extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg); +extern int sas_drain_work(struct sas_ha_struct *ha); extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, struct request *req); -- cgit v1.2.3-59-g8ed1b From 87c8331fcf72e501c3a3c0cdc5c9391ec72f7cf2 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 17 Nov 2011 17:59:51 -0800 Subject: [SCSI] libsas: prevent domain rediscovery competing with ata error handling libata error handling provides for a timeout for link recovery. libsas must not rescan for previously known devices in this interval otherwise it may remove a device that is simply waiting for its link to recover. Let libata-eh make the determination of when the link is stable and prevent libsas (host workqueue) from taking action while this determination is pending. Using a mutex (ha->disco_mutex) to flush and disable revalidation while eh is running requires any discovery action that may block on eh be moved to its own context outside the lock. Probing ATA devices explicitly waits on ata-eh and the cache-flush-io issued during device removal may also pend awaiting eh completion. Essentially any rphy add/remove activity needs to run outside the lock. This adds two new cleanup states for sas_unregister_domain_devices() 'allocated-but-not-probed', and 'flagged-for-destruction'. In the 'allocated-but-not-probed' state dev->rphy points to a rphy that is known to have not been through a sas_rphy_add() event. At domain teardown check if this device is still pending probe and cleanup accordingly. Similarly if a device has already been queued for removal then sas_unregister_domain_devices has nothing to do. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_ata.c | 55 ++++++++++++++++++++++++++++++--- drivers/scsi/libsas/sas_discover.c | 63 ++++++++++++++++++++++++++++++++++---- drivers/scsi/libsas/sas_event.c | 26 ++++++++++++++++ drivers/scsi/libsas/sas_expander.c | 5 ++- drivers/scsi/libsas/sas_init.c | 2 ++ drivers/scsi/libsas/sas_internal.h | 3 ++ drivers/scsi/libsas/sas_port.c | 2 ++ drivers/scsi/scsi_transport_sas.c | 18 +++++++++-- include/scsi/libsas.h | 12 ++++++-- include/scsi/sas_ata.h | 5 +++ include/scsi/scsi_transport_sas.h | 1 + 11 files changed, 174 insertions(+), 18 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 2fc5a3961ca6..4b6365c6410f 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -758,6 +758,35 @@ static int sas_discover_sata_pm(struct domain_device *dev) return -ENODEV; } +void sas_probe_sata(struct work_struct *work) +{ + struct domain_device *dev, *n; + struct sas_discovery_event *ev = + container_of(work, struct sas_discovery_event, work); + struct asd_sas_port *port = ev->port; + + clear_bit(DISCE_PROBE, &port->disc.pending); + + list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { + int err; + + spin_lock_irq(&port->dev_list_lock); + list_add_tail(&dev->dev_list_node, &port->dev_list); + spin_unlock_irq(&port->dev_list_lock); + + err = sas_rphy_add(dev->rphy); + + if (err) { + SAS_DPRINTK("%s: for %s device %16llx returned %d\n", + __func__, dev->parent ? "exp-attached" : + "direct-attached", + SAS_ADDR(dev->sas_addr), err); + sas_unregister_dev(port, dev); + } else + list_del_init(&dev->disco_list_node); + } +} + /** * sas_discover_sata -- discover an STP/SATA domain device * @dev: pointer to struct domain_device of interest @@ -794,10 +823,15 @@ int sas_discover_sata(struct domain_device *dev) break; } sas_notify_lldd_dev_gone(dev); - if (!res) { - sas_notify_lldd_dev_found(dev); - res = sas_rphy_add(dev->rphy); - } + + if (res) + return res; + + res = sas_notify_lldd_dev_found(dev); + if (res) + return res; + + sas_discover_event(dev->port, DISCE_PROBE); return res; } @@ -805,6 +839,17 @@ int sas_discover_sata(struct domain_device *dev) void sas_ata_strategy_handler(struct Scsi_Host *shost) { struct scsi_device *sdev; + struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); + + /* it's ok to defer revalidation events during ata eh, these + * disks are in one of three states: + * 1/ present for initial domain discovery, and these + * resets will cause bcn flutters + * 2/ hot removed, we'll discover that after eh fails + * 3/ hot added after initial discovery, lost the race, and need + * to catch the next train. + */ + sas_disable_revalidation(sas_ha); shost_for_each_device(sdev, shost) { struct domain_device *ddev = sdev_to_domain_dev(sdev); @@ -816,6 +861,8 @@ void sas_ata_strategy_handler(struct Scsi_Host *shost) ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler"); ata_scsi_port_error_handler(shost, ap); } + + sas_enable_revalidation(sas_ha); } int sas_ata_timed_out(struct scsi_cmnd *cmd, struct sas_task *task, diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index 32e011766046..7e8fdcb202b7 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -148,9 +148,14 @@ static int sas_get_port_device(struct asd_sas_port *port) port->disc.max_level = 0; dev->rphy = rphy; - spin_lock_irq(&port->dev_list_lock); - list_add_tail(&dev->dev_list_node, &port->dev_list); - spin_unlock_irq(&port->dev_list_lock); + + if (dev_is_sata(dev)) + list_add_tail(&dev->disco_list_node, &port->disco_list); + else { + spin_lock_irq(&port->dev_list_lock); + list_add_tail(&dev->dev_list_node, &port->dev_list); + spin_unlock_irq(&port->dev_list_lock); + } return 0; } @@ -255,14 +260,43 @@ static void sas_unregister_common_dev(struct asd_sas_port *port, struct domain_d sas_put_device(dev); } -void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev) +static void sas_destruct_devices(struct work_struct *work) { - if (dev->rphy) { + struct domain_device *dev, *n; + struct sas_discovery_event *ev = + container_of(work, struct sas_discovery_event, work); + struct asd_sas_port *port = ev->port; + + clear_bit(DISCE_DESTRUCT, &port->disc.pending); + + list_for_each_entry_safe(dev, n, &port->destroy_list, disco_list_node) { + list_del_init(&dev->disco_list_node); + sas_remove_children(&dev->rphy->dev); sas_rphy_delete(dev->rphy); dev->rphy = NULL; + sas_unregister_common_dev(port, dev); + + sas_put_device(dev); + } +} + +void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev) +{ + if (!test_bit(SAS_DEV_DESTROY, &dev->state) && + !list_empty(&dev->disco_list_node)) { + /* this rphy never saw sas_rphy_add */ + list_del_init(&dev->disco_list_node); + sas_rphy_free(dev->rphy); + dev->rphy = NULL; + sas_unregister_common_dev(port, dev); + } + + if (dev->rphy && !test_and_set_bit(SAS_DEV_DESTROY, &dev->state)) { + sas_rphy_unlink(dev->rphy); + list_move_tail(&dev->disco_list_node, &port->destroy_list); + sas_discover_event(dev->port, DISCE_DESTRUCT); } - sas_unregister_common_dev(port, dev); } void sas_unregister_domain_devices(struct asd_sas_port *port) @@ -271,6 +305,8 @@ void sas_unregister_domain_devices(struct asd_sas_port *port) list_for_each_entry_safe_reverse(dev, n, &port->dev_list, dev_list_node) sas_unregister_dev(port, dev); + list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) + sas_unregister_dev(port, dev); port->port->rphy = NULL; @@ -335,6 +371,7 @@ static void sas_discover_domain(struct work_struct *work) sas_rphy_free(dev->rphy); dev->rphy = NULL; + list_del_init(&dev->disco_list_node); spin_lock_irq(&port->dev_list_lock); list_del_init(&dev->dev_list_node); spin_unlock_irq(&port->dev_list_lock); @@ -353,16 +390,28 @@ static void sas_revalidate_domain(struct work_struct *work) struct sas_discovery_event *ev = container_of(work, struct sas_discovery_event, work); struct asd_sas_port *port = ev->port; + struct sas_ha_struct *ha = port->ha; + + /* prevent revalidation from finding sata links in recovery */ + mutex_lock(&ha->disco_mutex); + if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) { + SAS_DPRINTK("REVALIDATION DEFERRED on port %d, pid:%d\n", + port->id, task_pid_nr(current)); + goto out; + } clear_bit(DISCE_REVALIDATE_DOMAIN, &port->disc.pending); SAS_DPRINTK("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id, task_pid_nr(current)); + if (port->port_dev) res = sas_ex_revalidate_domain(port->port_dev); SAS_DPRINTK("done REVALIDATING DOMAIN on port %d, pid:%d, res 0x%x\n", port->id, task_pid_nr(current), res); + out: + mutex_unlock(&ha->disco_mutex); } /* ---------- Events ---------- */ @@ -414,6 +463,8 @@ void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *port) static const work_func_t sas_event_fns[DISC_NUM_EVENTS] = { [DISCE_DISCOVER_DOMAIN] = sas_discover_domain, [DISCE_REVALIDATE_DOMAIN] = sas_revalidate_domain, + [DISCE_PROBE] = sas_probe_sata, + [DISCE_DESTRUCT] = sas_destruct_devices, }; disc->pending = 0; diff --git a/drivers/scsi/libsas/sas_event.c b/drivers/scsi/libsas/sas_event.c index e5035aa4c2a6..933d757499b5 100644 --- a/drivers/scsi/libsas/sas_event.c +++ b/drivers/scsi/libsas/sas_event.c @@ -81,6 +81,32 @@ int sas_drain_work(struct sas_ha_struct *ha) } EXPORT_SYMBOL_GPL(sas_drain_work); +void sas_disable_revalidation(struct sas_ha_struct *ha) +{ + mutex_lock(&ha->disco_mutex); + set_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state); + mutex_unlock(&ha->disco_mutex); +} + +void sas_enable_revalidation(struct sas_ha_struct *ha) +{ + int i; + + mutex_lock(&ha->disco_mutex); + clear_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state); + for (i = 0; i < ha->num_phys; i++) { + struct asd_sas_port *port = ha->sas_port[i]; + const int ev = DISCE_REVALIDATE_DOMAIN; + struct sas_discovery *d = &port->disc; + + if (!test_and_clear_bit(ev, &d->pending)) + continue; + + sas_queue_event(ev, &d->pending, &d->disc_work[ev].work, ha); + } + mutex_unlock(&ha->disco_mutex); +} + static void notify_ha_event(struct sas_ha_struct *sas_ha, enum ha_event event) { BUG_ON(event >= HA_NUM_EVENTS); diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index f33d0c9911c4..e45b259dac4c 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -704,9 +704,7 @@ static struct domain_device *sas_ex_discover_end_dev( child->rphy = rphy; - spin_lock_irq(&parent->port->dev_list_lock); - list_add_tail(&child->dev_list_node, &parent->port->dev_list); - spin_unlock_irq(&parent->port->dev_list_lock); + list_add_tail(&child->disco_list_node, &parent->port->disco_list); res = sas_discover_sata(child); if (res) { @@ -756,6 +754,7 @@ static struct domain_device *sas_ex_discover_end_dev( sas_rphy_free(child->rphy); child->rphy = NULL; + list_del(&child->disco_list_node); spin_lock_irq(&parent->port->dev_list_lock); list_del(&child->dev_list_node); spin_unlock_irq(&parent->port->dev_list_lock); diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index 572b943d7603..52cd11d76664 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -104,6 +104,7 @@ int sas_register_ha(struct sas_ha_struct *sas_ha) { int error = 0; + mutex_init(&sas_ha->disco_mutex); spin_lock_init(&sas_ha->phy_port_lock); sas_hash_addr(sas_ha->hashed_sas_addr, sas_ha->sas_addr); @@ -168,6 +169,7 @@ int sas_unregister_ha(struct sas_ha_struct *sas_ha) sas_drain_work(sas_ha); sas_unregister_ports(sas_ha); + sas_drain_work(sas_ha); if (sas_ha->lldd_max_execute_num > 1) { sas_shutdown_queue(sas_ha); diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 948ea64cc2eb..ebe9b81ddef5 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -56,6 +56,8 @@ 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_disable_revalidation(struct sas_ha_struct *ha); +void sas_enable_revalidation(struct sas_ha_struct *ha); void sas_deform_port(struct asd_sas_phy *phy, int gone); @@ -138,6 +140,7 @@ static inline struct domain_device *sas_alloc_device(void) if (dev) { INIT_LIST_HEAD(&dev->siblings); INIT_LIST_HEAD(&dev->dev_list_node); + INIT_LIST_HEAD(&dev->disco_list_node); kref_init(&dev->kref); } return dev; diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c index d88e55f9732b..2980bde4e34a 100644 --- a/drivers/scsi/libsas/sas_port.c +++ b/drivers/scsi/libsas/sas_port.c @@ -277,6 +277,8 @@ static void sas_init_port(struct asd_sas_port *port, memset(port, 0, sizeof(*port)); port->id = i; INIT_LIST_HEAD(&port->dev_list); + INIT_LIST_HEAD(&port->disco_list); + INIT_LIST_HEAD(&port->destroy_list); spin_lock_init(&port->phy_list_lock); INIT_LIST_HEAD(&port->phy_list); port->ha = sas_ha; diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index 9d9330ae4213..9421bae8af1a 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -1602,6 +1602,20 @@ sas_rphy_delete(struct sas_rphy *rphy) } EXPORT_SYMBOL(sas_rphy_delete); +/** + * sas_rphy_unlink - unlink SAS remote PHY + * @rphy: SAS remote phy to unlink from its parent port + * + * Removes port reference to an rphy + */ +void sas_rphy_unlink(struct sas_rphy *rphy) +{ + struct sas_port *parent = dev_to_sas_port(rphy->dev.parent); + + parent->rphy = NULL; +} +EXPORT_SYMBOL(sas_rphy_unlink); + /** * sas_rphy_remove - remove SAS remote PHY * @rphy: SAS remote phy to remove @@ -1612,7 +1626,6 @@ void sas_rphy_remove(struct sas_rphy *rphy) { struct device *dev = &rphy->dev; - struct sas_port *parent = dev_to_sas_port(dev->parent); switch (rphy->identify.device_type) { case SAS_END_DEVICE: @@ -1626,10 +1639,9 @@ sas_rphy_remove(struct sas_rphy *rphy) break; } + sas_rphy_unlink(rphy); transport_remove_device(dev); device_del(dev); - - parent->rphy = NULL; } EXPORT_SYMBOL(sas_rphy_remove); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index d792b13cfcf5..bd6e89ece2ab 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -86,7 +86,9 @@ enum discover_event { DISCE_DISCOVER_DOMAIN = 0U, DISCE_REVALIDATE_DOMAIN = 1, DISCE_PORT_GONE = 2, - DISC_NUM_EVENTS = 3, + DISCE_PROBE = 3, + DISCE_DESTRUCT = 4, + DISC_NUM_EVENTS = 5, }; /* ---------- Expander Devices ---------- */ @@ -175,6 +177,7 @@ struct sata_device { enum { SAS_DEV_GONE, + SAS_DEV_DESTROY, }; struct domain_device { @@ -191,6 +194,7 @@ struct domain_device { struct asd_sas_port *port; /* shortcut to root of the tree */ struct list_head dev_list_node; + struct list_head disco_list_node; /* awaiting probe or destruct */ enum sas_protocol iproto; enum sas_protocol tproto; @@ -226,7 +230,6 @@ struct sas_discovery { int max_level; }; - /* The port struct is Class:RW, driver:RO */ struct asd_sas_port { /* private: */ @@ -236,6 +239,8 @@ struct asd_sas_port { struct domain_device *port_dev; spinlock_t dev_list_lock; struct list_head dev_list; + struct list_head disco_list; + struct list_head destroy_list; enum sas_linkrate linkrate; struct sas_phy *phy; @@ -334,6 +339,7 @@ struct sas_ha_event { enum sas_ha_state { SAS_HA_REGISTERED, SAS_HA_DRAINING, + SAS_HA_ATA_EH_ACTIVE, }; struct sas_ha_struct { @@ -346,6 +352,8 @@ struct sas_ha_struct { unsigned long state; spinlock_t state_lock; + struct mutex disco_mutex; + struct scsi_core core; /* public: */ diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h index 7d5013f8653d..557fc9a8559b 100644 --- a/include/scsi/sas_ata.h +++ b/include/scsi/sas_ata.h @@ -45,6 +45,7 @@ int sas_ata_timed_out(struct scsi_cmnd *cmd, struct sas_task *task, enum blk_eh_timer_return *rtn); int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q); +void sas_probe_sata(struct work_struct *work); #else @@ -78,6 +79,10 @@ static inline int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, return 0; } +static inline void sas_probe_sata(struct work_struct *work) +{ +} + #endif #endif /* _SAS_ATA_H_ */ diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index ffeebc34a4f7..6d14daac7589 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -194,6 +194,7 @@ void sas_rphy_free(struct sas_rphy *); extern int sas_rphy_add(struct sas_rphy *); extern void sas_rphy_remove(struct sas_rphy *); extern void sas_rphy_delete(struct sas_rphy *); +extern void sas_rphy_unlink(struct sas_rphy *); extern int scsi_is_sas_rphy(const struct device *); struct sas_port *sas_port_alloc(struct device *, int); -- cgit v1.2.3-59-g8ed1b From 9095a64a9aead653df320e3a6fc70835c15d46e4 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Mon, 28 Nov 2011 11:29:20 -0800 Subject: [SCSI] libsas: fix timeout vs completion race Until we have told the lldd to forget a task a timed out operation can return from the hardware at any time. Since completion frees the task we need to make sure that no tasks run their normal completion handler once eh has decided to manage the task. Similar to ata_scsi_cmd_error_handler() freeze completions to let eh judge the outcome of the race. Task collector mode is problematic because it presents a situation where a task can be timed out and aborted before the lldd has even seen it. For this case we need to guarantee that a task that an lldd has been told to forget does not get queued after the lldd says "never seen it". With sas_scsi_timed_out we achieve this with the ->task_queue_flush mutex, rather than adding more time. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_ata.c | 35 +++++------- drivers/scsi/libsas/sas_internal.h | 1 + drivers/scsi/libsas/sas_scsi_host.c | 104 ++++++++++++++++++------------------ include/scsi/libsas.h | 3 ++ include/scsi/sas_ata.h | 8 --- 5 files changed, 68 insertions(+), 83 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 903bb441b9f9..4c2a1402373c 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -93,21 +93,30 @@ static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts) static void sas_ata_task_done(struct sas_task *task) { struct ata_queued_cmd *qc = task->uldd_task; - struct domain_device *dev; + struct domain_device *dev = task->dev; struct task_status_struct *stat = &task->task_status; struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; - struct sas_ha_struct *sas_ha; + struct sas_ha_struct *sas_ha = dev->port->ha; enum ata_completion_errors ac; unsigned long flags; struct ata_link *link; struct ata_port *ap; + spin_lock_irqsave(&dev->done_lock, flags); + if (test_bit(SAS_HA_FROZEN, &sas_ha->state)) + task = NULL; + else if (qc && qc->scsicmd) + ASSIGN_SAS_TASK(qc->scsicmd, NULL); + spin_unlock_irqrestore(&dev->done_lock, flags); + + /* check if libsas-eh got to the task before us */ + if (unlikely(!task)) + return; + if (!qc) goto qc_already_gone; ap = qc->ap; - dev = ap->private_data; - sas_ha = dev->port->ha; link = &ap->link; spin_lock_irqsave(ap->lock, flags); @@ -156,8 +165,6 @@ static void sas_ata_task_done(struct sas_task *task) } qc->lldd_task = NULL; - if (qc->scsicmd) - ASSIGN_SAS_TASK(qc->scsicmd, NULL); ata_qc_complete(qc); spin_unlock_irqrestore(ap->lock, flags); @@ -633,22 +640,6 @@ void sas_ata_strategy_handler(struct Scsi_Host *shost) sas_enable_revalidation(sas_ha); } -int sas_ata_timed_out(struct scsi_cmnd *cmd, struct sas_task *task, - enum blk_eh_timer_return *rtn) -{ - struct domain_device *ddev = cmd_to_domain_dev(cmd); - - if (!dev_is_sata(ddev) || task) - return 0; - - /* we're a sata device with no task, so this must be a libata - * eh timeout. Ideally should hook into libata timeout - * handling, but there's no point, it just wants to activate - * the eh thread */ - *rtn = BLK_EH_NOT_HANDLED; - return 1; -} - int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q) { diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index ebe9b81ddef5..662ffcba99d2 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -142,6 +142,7 @@ static inline struct domain_device *sas_alloc_device(void) INIT_LIST_HEAD(&dev->dev_list_node); INIT_LIST_HEAD(&dev->disco_list_node); kref_init(&dev->kref); + spin_lock_init(&dev->done_lock); } return dev; } diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 50db8f971a06..0e3fdba7b510 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -119,9 +119,19 @@ static void sas_end_task(struct scsi_cmnd *sc, struct sas_task *task) static void sas_scsi_task_done(struct sas_task *task) { struct scsi_cmnd *sc = task->uldd_task; + struct domain_device *dev = task->dev; + struct sas_ha_struct *ha = dev->port->ha; + unsigned long flags; + + spin_lock_irqsave(&dev->done_lock, flags); + if (test_bit(SAS_HA_FROZEN, &ha->state)) + task = NULL; + else + ASSIGN_SAS_TASK(sc, NULL); + spin_unlock_irqrestore(&dev->done_lock, flags); - if (unlikely(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { - /* Aborted tasks will be completed by the error handler */ + if (unlikely(!task)) { + /* task will be completed by the error handler */ SAS_DPRINTK("task done but aborted\n"); return; } @@ -133,7 +143,6 @@ static void sas_scsi_task_done(struct sas_task *task) return; } - ASSIGN_SAS_TASK(sc, NULL); sas_end_task(sc, task); sc->scsi_done(sc); } @@ -298,6 +307,7 @@ enum task_disposition { TASK_IS_DONE, TASK_IS_ABORTED, TASK_IS_AT_LU, + TASK_IS_NOT_AT_HA, TASK_IS_NOT_AT_LU, TASK_ABORT_FAILED, }; @@ -314,19 +324,18 @@ static enum task_disposition sas_scsi_find_task(struct sas_task *task) struct scsi_core *core = &ha->core; struct sas_task *t, *n; + mutex_lock(&core->task_queue_flush); spin_lock_irqsave(&core->task_queue_lock, flags); - list_for_each_entry_safe(t, n, &core->task_queue, list) { + list_for_each_entry_safe(t, n, &core->task_queue, list) if (task == t) { list_del_init(&t->list); - spin_unlock_irqrestore(&core->task_queue_lock, - flags); - SAS_DPRINTK("%s: task 0x%p aborted from " - "task_queue\n", - __func__, task); - return TASK_IS_ABORTED; + break; } - } spin_unlock_irqrestore(&core->task_queue_lock, flags); + mutex_unlock(&core->task_queue_flush); + + if (task == t) + return TASK_IS_NOT_AT_HA; } for (i = 0; i < 5; i++) { @@ -499,8 +508,7 @@ try_bus_reset: } static int sas_eh_handle_sas_errors(struct Scsi_Host *shost, - struct list_head *work_q, - struct list_head *done_q) + struct list_head *work_q) { struct scsi_cmnd *cmd, *n; enum task_disposition res = TASK_IS_DONE; @@ -511,7 +519,16 @@ static int sas_eh_handle_sas_errors(struct Scsi_Host *shost, Again: list_for_each_entry_safe(cmd, n, work_q, eh_entry) { - struct sas_task *task = TO_SAS_TASK(cmd); + struct domain_device *dev = cmd_to_domain_dev(cmd); + struct sas_task *task; + + spin_lock_irqsave(&dev->done_lock, flags); + /* by this point the lldd has either observed + * SAS_HA_FROZEN and is leaving the task alone, or has + * won the race with eh and decided to complete it + */ + task = TO_SAS_TASK(cmd); + spin_unlock_irqrestore(&dev->done_lock, flags); if (!task) continue; @@ -534,6 +551,14 @@ Again: cmd->eh_eflags = 0; switch (res) { + case TASK_IS_NOT_AT_HA: + SAS_DPRINTK("%s: task 0x%p is not at ha: %s\n", + __func__, task, + cmd->retries ? "retry" : "aborted"); + if (cmd->retries) + cmd->retries--; + sas_eh_finish_cmd(cmd); + continue; case TASK_IS_DONE: SAS_DPRINTK("%s: task 0x%p is done\n", __func__, task); @@ -635,7 +660,8 @@ void sas_scsi_recover_host(struct Scsi_Host *shost) * Deal with commands that still have SAS tasks (i.e. they didn't * complete via the normal sas_task completion mechanism) */ - if (sas_eh_handle_sas_errors(shost, &eh_work_q, &ha->eh_done_q)) + set_bit(SAS_HA_FROZEN, &ha->state); + if (sas_eh_handle_sas_errors(shost, &eh_work_q)) goto out; /* @@ -649,6 +675,10 @@ void sas_scsi_recover_host(struct Scsi_Host *shost) scsi_eh_ready_devs(shost, &eh_work_q, &ha->eh_done_q); out: + clear_bit(SAS_HA_FROZEN, &ha->state); + if (ha->lldd_max_execute_num > 1) + wake_up_process(ha->core.queue_thread); + /* now link into libata eh --- if we have any ata devices */ sas_ata_strategy_handler(shost); @@ -660,43 +690,7 @@ out: enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd) { - struct sas_task *task = TO_SAS_TASK(cmd); - unsigned long flags; - enum blk_eh_timer_return rtn; - - if (sas_ata_timed_out(cmd, task, &rtn)) - return rtn; - - if (!task) { - cmd->request->timeout /= 2; - SAS_DPRINTK("command 0x%p, task 0x%p, gone: %s\n", - cmd, task, (cmd->request->timeout ? - "BLK_EH_RESET_TIMER" : "BLK_EH_NOT_HANDLED")); - if (!cmd->request->timeout) - return BLK_EH_NOT_HANDLED; - return BLK_EH_RESET_TIMER; - } - - spin_lock_irqsave(&task->task_state_lock, flags); - BUG_ON(task->task_state_flags & SAS_TASK_STATE_ABORTED); - if (task->task_state_flags & SAS_TASK_STATE_DONE) { - spin_unlock_irqrestore(&task->task_state_lock, flags); - SAS_DPRINTK("command 0x%p, task 0x%p, timed out: " - "BLK_EH_HANDLED\n", cmd, task); - return BLK_EH_HANDLED; - } - if (!(task->task_state_flags & SAS_TASK_AT_INITIATOR)) { - spin_unlock_irqrestore(&task->task_state_lock, flags); - SAS_DPRINTK("command 0x%p, task 0x%p, not at initiator: " - "BLK_EH_RESET_TIMER\n", - cmd, task); - return BLK_EH_RESET_TIMER; - } - task->task_state_flags |= SAS_TASK_STATE_ABORTED; - spin_unlock_irqrestore(&task->task_state_lock, flags); - - SAS_DPRINTK("command 0x%p, task 0x%p, timed out: BLK_EH_NOT_HANDLED\n", - cmd, task); + scmd_printk(KERN_DEBUG, cmd, "command %p timed out\n", cmd); return BLK_EH_NOT_HANDLED; } @@ -861,9 +855,11 @@ static void sas_queue(struct sas_ha_struct *sas_ha) int res; struct sas_internal *i = to_sas_internal(core->shost->transportt); + mutex_lock(&core->task_queue_flush); spin_lock_irqsave(&core->task_queue_lock, flags); while (!kthread_should_stop() && - !list_empty(&core->task_queue)) { + !list_empty(&core->task_queue) && + !test_bit(SAS_HA_FROZEN, &sas_ha->state)) { can_queue = sas_ha->lldd_queue_size - core->task_queue_size; if (can_queue >= 0) { @@ -899,6 +895,7 @@ static void sas_queue(struct sas_ha_struct *sas_ha) } } spin_unlock_irqrestore(&core->task_queue_lock, flags); + mutex_unlock(&core->task_queue_flush); } /** @@ -925,6 +922,7 @@ int sas_init_queue(struct sas_ha_struct *sas_ha) struct scsi_core *core = &sas_ha->core; spin_lock_init(&core->task_queue_lock); + mutex_init(&core->task_queue_flush); core->task_queue_size = 0; INIT_LIST_HEAD(&core->task_queue); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 071041b290d6..aa7192ff4355 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -178,6 +178,7 @@ enum { }; struct domain_device { + spinlock_t done_lock; enum sas_dev_type dev_type; enum sas_linkrate linkrate; @@ -321,6 +322,7 @@ struct asd_sas_phy { struct scsi_core { struct Scsi_Host *shost; + struct mutex task_queue_flush; spinlock_t task_queue_lock; struct list_head task_queue; int task_queue_size; @@ -337,6 +339,7 @@ enum sas_ha_state { SAS_HA_REGISTERED, SAS_HA_DRAINING, SAS_HA_ATA_EH_ACTIVE, + SAS_HA_FROZEN, }; struct sas_ha_struct { diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h index 557fc9a8559b..9f7a23d1146d 100644 --- a/include/scsi/sas_ata.h +++ b/include/scsi/sas_ata.h @@ -41,8 +41,6 @@ int sas_ata_init_host_and_port(struct domain_device *found_dev, void sas_ata_task_abort(struct sas_task *task); void sas_ata_strategy_handler(struct Scsi_Host *shost); -int sas_ata_timed_out(struct scsi_cmnd *cmd, struct sas_task *task, - enum blk_eh_timer_return *rtn); int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q); void sas_probe_sata(struct work_struct *work); @@ -67,12 +65,6 @@ static inline void sas_ata_strategy_handler(struct Scsi_Host *shost) { } -static inline int sas_ata_timed_out(struct scsi_cmnd *cmd, - struct sas_task *task, - enum blk_eh_timer_return *rtn) -{ - return 0; -} static inline int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q) { -- cgit v1.2.3-59-g8ed1b From 0b3e09da1350397f3f8b6fd839ab455b0b587451 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 20 Dec 2011 01:03:48 -0800 Subject: [SCSI] libsas: perform sas-transport resets in shost->workq context Extend the sas transport class to allow transport users to attach extra data to a sas_phy (->hostdata). Use this area in libsas to move resets to workq context in preparation for scheduling ata device resets through libata-eh. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_event.c | 2 +- drivers/scsi/libsas/sas_init.c | 59 +++++++++++++++++++++++++++++++++++++- drivers/scsi/libsas/sas_internal.h | 10 +++++++ drivers/scsi/scsi_transport_sas.c | 18 +++++++++++- include/scsi/scsi_transport_sas.h | 5 +++- 5 files changed, 90 insertions(+), 4 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_event.c b/drivers/scsi/libsas/sas_event.c index 933d757499b5..dbfaceeea0f7 100644 --- a/drivers/scsi/libsas/sas_event.c +++ b/drivers/scsi/libsas/sas_event.c @@ -27,7 +27,7 @@ #include "sas_internal.h" #include "sas_dump.h" -static void sas_queue_work(struct sas_ha_struct *ha, struct work_struct *work) +void sas_queue_work(struct sas_ha_struct *ha, struct work_struct *work) { if (!test_bit(SAS_HA_REGISTERED, &ha->state)) return; diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index e17fe35af30c..cb65adf4ab16 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -290,9 +290,66 @@ int sas_set_phy_speed(struct sas_phy *phy, return ret; } +static void sas_phy_release(struct sas_phy *phy) +{ + kfree(phy->hostdata); + phy->hostdata = NULL; +} + +static void phy_reset_work(struct work_struct *work) +{ + struct sas_phy_data *d = container_of(work, typeof(*d), reset_work); + + d->reset_result = sas_phy_reset(d->phy, d->hard_reset); +} + +static int sas_phy_setup(struct sas_phy *phy) +{ + struct sas_phy_data *d = kzalloc(sizeof(*d), GFP_KERNEL); + + if (!d) + return -ENOMEM; + + mutex_init(&d->event_lock); + INIT_WORK(&d->reset_work, phy_reset_work); + d->phy = phy; + phy->hostdata = d; + + return 0; +} + +static int queue_phy_reset(struct sas_phy *phy, int hard_reset) +{ + struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); + struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); + struct sas_phy_data *d = phy->hostdata; + int rc; + + if (!d) + return -ENOMEM; + + /* libsas workqueue coordinates ata-eh reset with discovery */ + mutex_lock(&d->event_lock); + d->reset_result = 0; + d->hard_reset = hard_reset; + + spin_lock_irq(&ha->state_lock); + sas_queue_work(ha, &d->reset_work); + spin_unlock_irq(&ha->state_lock); + + rc = sas_drain_work(ha); + if (rc == 0) + rc = d->reset_result; + mutex_unlock(&d->event_lock); + + return rc; +} + static struct sas_function_template sft = { .phy_enable = sas_phy_enable, - .phy_reset = sas_phy_reset, + .phy_reset = queue_phy_reset, + .phy_setup = sas_phy_setup, + .phy_release = sas_phy_release, .set_phy_speed = sas_set_phy_speed, .get_linkerrors = sas_get_linkerrors, .smp_handler = sas_smp_handler, diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 662ffcba99d2..9ba65e0c6f91 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -38,6 +38,15 @@ #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) +struct sas_phy_data { + /* let reset be performed in sas_queue_work() context */ + struct sas_phy *phy; + struct mutex event_lock; + int hard_reset; + int reset_result; + struct work_struct reset_work; +}; + void sas_scsi_recover_host(struct Scsi_Host *shost); int sas_show_class(enum sas_class class, char *buf); @@ -66,6 +75,7 @@ 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); +void sas_queue_work(struct sas_ha_struct *ha, struct work_struct *work); int sas_notify_lldd_dev_found(struct domain_device *); void sas_notify_lldd_dev_gone(struct domain_device *); diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index 9421bae8af1a..ab3bd0b5ffd9 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -652,9 +652,21 @@ sas_phy_linkerror_attr(running_disparity_error_count); sas_phy_linkerror_attr(loss_of_dword_sync_count); sas_phy_linkerror_attr(phy_reset_problem_count); +static int sas_phy_setup(struct transport_container *tc, struct device *dev, + struct device *cdev) +{ + struct sas_phy *phy = dev_to_phy(dev); + struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); + struct sas_internal *i = to_sas_internal(shost->transportt); + + if (i->f->phy_setup) + i->f->phy_setup(phy); + + return 0; +} static DECLARE_TRANSPORT_CLASS(sas_phy_class, - "sas_phy", NULL, NULL, NULL); + "sas_phy", sas_phy_setup, NULL, NULL); static int sas_phy_match(struct attribute_container *cont, struct device *dev) { @@ -678,7 +690,11 @@ static int sas_phy_match(struct attribute_container *cont, struct device *dev) static void sas_phy_release(struct device *dev) { struct sas_phy *phy = dev_to_phy(dev); + struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); + struct sas_internal *i = to_sas_internal(shost->transportt); + if (i->f->phy_release) + i->f->phy_release(phy); put_device(dev->parent); kfree(phy); } diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index 6d14daac7589..42817facaeda 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -75,7 +75,8 @@ struct sas_phy { /* for the list of phys belonging to a port */ struct list_head port_siblings; - struct work_struct reset_work; + /* available to the lldd */ + void *hostdata; }; #define dev_to_phy(d) \ @@ -169,6 +170,8 @@ struct sas_function_template { int (*get_bay_identifier)(struct sas_rphy *); int (*phy_reset)(struct sas_phy *, int); int (*phy_enable)(struct sas_phy *, int); + int (*phy_setup)(struct sas_phy *); + void (*phy_release)(struct sas_phy *); int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *); int (*smp_handler)(struct Scsi_Host *, struct sas_rphy *, struct request *); }; -- cgit v1.2.3-59-g8ed1b From 81c757bc696284f39f07766f0c2ca67af64ce9bd Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Fri, 2 Dec 2011 16:07:01 -0800 Subject: [SCSI] libsas: execute transport link resets with libata-eh via host workqueue Link resets leave ata affiliations intact, so arrange for libsas to make an effort to avoid dropping the device due to a slow-to-recover link. Towards this end carry out reset in the host workqueue so that it can check for ata devices and kick the reset request to libata. Hard resets, in contrast, bypass libata since they are meant for associating an ata device with another initiator in the domain (tears down affiliations). Need to add a new transport_sas_phy_reset() since the current sas_phy_reset() is a utility function to libsas lldds. They are not prepared for it to loop back into eh. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/ata/libata-eh.c | 1 + drivers/ata/libata.h | 1 - drivers/scsi/libsas/sas_ata.c | 11 ++++++++ drivers/scsi/libsas/sas_expander.c | 2 +- drivers/scsi/libsas/sas_init.c | 56 +++++++++++++++++++++++++++++++++++++- drivers/scsi/libsas/sas_internal.h | 1 + include/linux/libata.h | 1 + include/scsi/sas_ata.h | 4 +++ 8 files changed, 74 insertions(+), 3 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index a9b282038000..c61316e9d2f7 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -863,6 +863,7 @@ void ata_port_wait_eh(struct ata_port *ap) goto retry; } } +EXPORT_SYMBOL_GPL(ata_port_wait_eh); static int ata_eh_nr_in_flight(struct ata_port *ap) { diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 814486d35c44..1fab235ee516 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -151,7 +151,6 @@ extern void ata_eh_acquire(struct ata_port *ap); extern void ata_eh_release(struct ata_port *ap); extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd); extern void ata_scsi_error(struct Scsi_Host *host); -extern void ata_port_wait_eh(struct ata_port *ap); extern void ata_eh_fastdrain_timerfn(unsigned long arg); extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc); extern void ata_dev_disable(struct ata_device *dev); diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 48cadf88c399..03930a04a679 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -698,3 +698,14 @@ void sas_ata_schedule_reset(struct domain_device *dev) ata_port_schedule_eh(ap); spin_unlock_irqrestore(ap->lock, flags); } + +void sas_ata_wait_eh(struct domain_device *dev) +{ + struct ata_port *ap; + + if (!dev_is_sata(dev)) + return; + + ap = dev->sata_dev.ap; + ata_port_wait_eh(ap); +} diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index f4894b0f537b..d3c1a29b8a2a 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -228,7 +228,7 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id, } /* check if we have an existing attached ata device on this expander phy */ -static struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id) +struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id) { struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id]; struct domain_device *dev; diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index cb65adf4ab16..a15fb861daba 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -28,6 +28,7 @@ #include #include #include +#include #include #include #include @@ -195,6 +196,59 @@ static int sas_get_linkerrors(struct sas_phy *phy) return sas_smp_get_phy_events(phy); } +/** + * transport_sas_phy_reset - reset a phy and permit libata to manage the link + * + * phy reset request via sysfs in host workqueue context so we know we + * can block on eh and safely traverse the domain_device topology + */ +static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset) +{ + int ret; + enum phy_func reset_type; + + if (hard_reset) + reset_type = PHY_FUNC_HARD_RESET; + else + reset_type = PHY_FUNC_LINK_RESET; + + if (scsi_is_sas_phy_local(phy)) { + struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); + struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); + struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number]; + struct sas_internal *i = + to_sas_internal(sas_ha->core.shost->transportt); + struct domain_device *dev = NULL; + + if (asd_phy->port) + dev = asd_phy->port->port_dev; + + /* validate that dev has been probed */ + if (dev) + dev = sas_find_dev_by_rphy(dev->rphy); + + if (dev && dev_is_sata(dev) && !hard_reset) { + sas_ata_schedule_reset(dev); + sas_ata_wait_eh(dev); + ret = 0; + } else + ret = i->dft->lldd_control_phy(asd_phy, reset_type, NULL); + } else { + struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); + struct domain_device *ddev = sas_find_dev_by_rphy(rphy); + struct domain_device *ata_dev = sas_ex_to_ata(ddev, phy->number); + + if (ata_dev && !hard_reset) { + sas_ata_schedule_reset(ata_dev); + sas_ata_wait_eh(ata_dev); + ret = 0; + } else + ret = sas_smp_phy_control(ddev, phy->number, reset_type, NULL); + } + + return ret; +} + int sas_phy_enable(struct sas_phy *phy, int enable) { int ret; @@ -300,7 +354,7 @@ static void phy_reset_work(struct work_struct *work) { struct sas_phy_data *d = container_of(work, typeof(*d), reset_work); - d->reset_result = sas_phy_reset(d->phy, d->hard_reset); + d->reset_result = transport_sas_phy_reset(d->phy, d->hard_reset); } static int sas_phy_setup(struct sas_phy *phy) diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 9ba65e0c6f91..ae9698d9d857 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -85,6 +85,7 @@ int sas_smp_phy_control(struct domain_device *dev, int phy_id, int sas_smp_get_phy_events(struct sas_phy *phy); struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy); +struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id); void sas_hae_reset(struct work_struct *work); diff --git a/include/linux/libata.h b/include/linux/libata.h index cafc09a64fe4..aa4270477563 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1147,6 +1147,7 @@ static inline int ata_acpi_cbl_80wire(struct ata_port *ap, * EH - drivers/ata/libata-eh.c */ extern void ata_port_schedule_eh(struct ata_port *ap); +extern void ata_port_wait_eh(struct ata_port *ap); extern int ata_link_abort(struct ata_link *link); extern int ata_port_abort(struct ata_port *ap); extern int ata_port_freeze(struct ata_port *ap); diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h index c0bcd30eec56..da3f37727387 100644 --- a/include/scsi/sas_ata.h +++ b/include/scsi/sas_ata.h @@ -45,6 +45,7 @@ int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q); void sas_probe_sata(struct work_struct *work); void sas_ata_schedule_reset(struct domain_device *dev); +void sas_ata_wait_eh(struct domain_device *dev); #else @@ -79,6 +80,9 @@ static inline void sas_ata_schedule_reset(struct domain_device *dev) { } +static inline void sas_ata_wait_eh(struct domain_device *dev) +{ +} #endif #endif /* _SAS_ATA_H_ */ -- cgit v1.2.3-59-g8ed1b From 2a559f4ba443265b4c58925b48296f1cf81b49f9 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Sun, 4 Dec 2011 00:06:57 -0800 Subject: [SCSI] libsas: sas_phy_enable via transport_sas_phy_reset Execute the link-reset triggered by sas_phy_enable via transport_sas_phy_reset so that it can be managed by libata. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_init.c | 57 +++++++++++++++++++++++++++++++------ drivers/scsi/libsas/sas_internal.h | 3 ++ drivers/scsi/libsas/sas_scsi_host.c | 1 - include/scsi/libsas.h | 1 - 4 files changed, 52 insertions(+), 10 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index a15fb861daba..53ae893e8b0b 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -249,15 +249,15 @@ static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset) return ret; } -int sas_phy_enable(struct sas_phy *phy, int enable) +static int sas_phy_enable(struct sas_phy *phy, int enable) { int ret; - enum phy_func command; + enum phy_func cmd; if (enable) - command = PHY_FUNC_LINK_RESET; + cmd = PHY_FUNC_LINK_RESET; else - command = PHY_FUNC_DISABLE; + cmd = PHY_FUNC_DISABLE; if (scsi_is_sas_phy_local(phy)) { struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); @@ -266,15 +266,21 @@ int sas_phy_enable(struct sas_phy *phy, int enable) struct sas_internal *i = to_sas_internal(sas_ha->core.shost->transportt); - if (!enable) { + if (enable) + ret = transport_sas_phy_reset(phy, 0); + else { sas_phy_disconnected(asd_phy); sas_ha->notify_phy_event(asd_phy, PHYE_LOSS_OF_SIGNAL); + ret = i->dft->lldd_control_phy(asd_phy, cmd, NULL); } - ret = i->dft->lldd_control_phy(asd_phy, command, NULL); } else { struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); struct domain_device *ddev = sas_find_dev_by_rphy(rphy); - ret = sas_smp_phy_control(ddev, phy->number, command, NULL); + + if (enable) + ret = transport_sas_phy_reset(phy, 0); + else + ret = sas_smp_phy_control(ddev, phy->number, cmd, NULL); } return ret; } @@ -357,6 +363,13 @@ static void phy_reset_work(struct work_struct *work) d->reset_result = transport_sas_phy_reset(d->phy, d->hard_reset); } +static void phy_enable_work(struct work_struct *work) +{ + struct sas_phy_data *d = container_of(work, typeof(*d), enable_work); + + d->enable_result = sas_phy_enable(d->phy, d->enable); +} + static int sas_phy_setup(struct sas_phy *phy) { struct sas_phy_data *d = kzalloc(sizeof(*d), GFP_KERNEL); @@ -366,6 +379,7 @@ static int sas_phy_setup(struct sas_phy *phy) mutex_init(&d->event_lock); INIT_WORK(&d->reset_work, phy_reset_work); + INIT_WORK(&d->enable_work, phy_enable_work); d->phy = phy; phy->hostdata = d; @@ -399,8 +413,35 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset) return rc; } +static int queue_phy_enable(struct sas_phy *phy, int enable) +{ + struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); + struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); + struct sas_phy_data *d = phy->hostdata; + int rc; + + if (!d) + return -ENOMEM; + + /* libsas workqueue coordinates ata-eh reset with discovery */ + mutex_lock(&d->event_lock); + d->enable_result = 0; + d->enable = enable; + + spin_lock_irq(&ha->state_lock); + sas_queue_work(ha, &d->enable_work); + spin_unlock_irq(&ha->state_lock); + + rc = sas_drain_work(ha); + if (rc == 0) + rc = d->enable_result; + mutex_unlock(&d->event_lock); + + return rc; +} + static struct sas_function_template sft = { - .phy_enable = sas_phy_enable, + .phy_enable = queue_phy_enable, .phy_reset = queue_phy_reset, .phy_setup = sas_phy_setup, .phy_release = sas_phy_release, diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index ae9698d9d857..9e960b2d535a 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -45,6 +45,9 @@ struct sas_phy_data { int hard_reset; int reset_result; struct work_struct reset_work; + int enable; + int enable_result; + struct work_struct enable_work; }; void sas_scsi_recover_host(struct Scsi_Host *shost); diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index af71a6d0edae..5cc44fddfe95 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -1077,7 +1077,6 @@ EXPORT_SYMBOL_GPL(sas_change_queue_type); EXPORT_SYMBOL_GPL(sas_bios_param); EXPORT_SYMBOL_GPL(sas_task_abort); EXPORT_SYMBOL_GPL(sas_phy_reset); -EXPORT_SYMBOL_GPL(sas_phy_enable); EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler); EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler); EXPORT_SYMBOL_GPL(sas_slave_alloc); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 6b80310e08af..f388ba536128 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -634,7 +634,6 @@ extern int sas_unregister_ha(struct sas_ha_struct *); int sas_set_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates); -int sas_phy_enable(struct sas_phy *phy, int enabled); int sas_phy_reset(struct sas_phy *phy, int hard_reset); int sas_queue_up(struct sas_task *task); extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *); -- cgit v1.2.3-59-g8ed1b From 36a399473902a57218dc493c5a814708a56b73ab Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 17 Nov 2011 17:59:54 -0800 Subject: [SCSI] libsas: poll for ata device readiness after reset Use ata_wait_after_reset() to poll for link recovery after a reset. This combined with sas_ha->eh_mutex prevents expander rediscovery from probing phys in an intermediate state. Local discovery does not have a mechanism to filter link status changes during this timeout, so it remains the responsibility of lldds to prevent premature port teardown. Although once all lldd's support ->lldd_ata_check_ready() that could be used as a gate to local port teardown. The signature fis is re-transmitted when the link comes back so we should be revalidating the ata device class, but that is left to a future patch. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_ata.c | 104 ++++++++++++++++++++++++++----------- drivers/scsi/libsas/sas_expander.c | 10 ++-- drivers/scsi/libsas/sas_internal.h | 3 +- include/scsi/libsas.h | 1 + 4 files changed, 83 insertions(+), 35 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 4beca66728b4..5fdb63ad94b7 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -272,39 +272,84 @@ static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) return true; } -static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, - unsigned long deadline) +static struct sas_internal *dev_to_sas_internal(struct domain_device *dev) +{ + return to_sas_internal(dev->port->ha->core.shost->transportt); +} + +static int smp_ata_check_ready(struct ata_link *link) { + int res; + u8 addr[8]; struct ata_port *ap = link->ap; struct domain_device *dev = ap->private_data; - struct sas_internal *i = - to_sas_internal(dev->port->ha->core.shost->transportt); - int res = TMF_RESP_FUNC_FAILED; - int ret = 0; + struct domain_device *ex_dev = dev->parent; + struct sas_phy *phy = sas_find_local_phy(dev); - if (i->dft->lldd_I_T_nexus_reset) - res = i->dft->lldd_I_T_nexus_reset(dev); + res = sas_get_phy_attached_sas_addr(ex_dev, phy->number, addr); + /* break the wait early if the expander is unreachable, + * otherwise keep polling + */ + if (res == -ECOMM) + return res; + if (res != SMP_RESP_FUNC_ACC || SAS_ADDR(addr) == 0) + return 0; + else + return 1; +} - if (res != TMF_RESP_FUNC_COMPLETE) { - SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __func__); - ret = -EAGAIN; +static int local_ata_check_ready(struct ata_link *link) +{ + struct ata_port *ap = link->ap; + struct domain_device *dev = ap->private_data; + struct sas_internal *i = dev_to_sas_internal(dev); + + if (i->dft->lldd_ata_check_ready) + return i->dft->lldd_ata_check_ready(dev); + else { + /* lldd's that don't implement 'ready' checking get the + * old default behavior of not coordinating reset + * recovery with libata + */ + return 1; } +} +static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + int ret = 0, res; + struct ata_port *ap = link->ap; + int (*check_ready)(struct ata_link *link); + struct domain_device *dev = ap->private_data; + struct sas_phy *phy = sas_find_local_phy(dev); + struct sas_internal *i = dev_to_sas_internal(dev); + + res = i->dft->lldd_I_T_nexus_reset(dev); + + if (res != TMF_RESP_FUNC_COMPLETE) + SAS_DPRINTK("%s: Unable to reset ata device?\n", __func__); + + if (scsi_is_sas_phy_local(phy)) + check_ready = local_ata_check_ready; + else + check_ready = smp_ata_check_ready; + + ret = ata_wait_after_reset(link, deadline, check_ready); + if (ret && ret != -EAGAIN) + ata_link_err(link, "COMRESET failed (errno=%d)\n", ret); + + /* XXX: if the class changes during the reset the upper layer + * should be informed, if the device has gone away we assume + * libsas will eventually delete it + */ switch (dev->sata_dev.command_set) { - case ATA_COMMAND_SET: - SAS_DPRINTK("%s: Found ATA device.\n", __func__); - *class = ATA_DEV_ATA; - break; - case ATAPI_COMMAND_SET: - SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); - *class = ATA_DEV_ATAPI; - break; - default: - SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", - __func__, - dev->sata_dev.command_set); - *class = ATA_DEV_UNKNOWN; - break; + case ATA_COMMAND_SET: + *class = ATA_DEV_ATA; + break; + case ATAPI_COMMAND_SET: + *class = ATA_DEV_ATAPI; + break; } ap->cbl = ATA_CBL_SATA; @@ -316,8 +361,7 @@ static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class, { struct ata_port *ap = link->ap; struct domain_device *dev = ap->private_data; - struct sas_internal *i = - to_sas_internal(dev->port->ha->core.shost->transportt); + struct sas_internal *i = dev_to_sas_internal(dev); int res = TMF_RESP_FUNC_FAILED; int ret = 0; @@ -355,8 +399,7 @@ static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class, */ static void sas_ata_internal_abort(struct sas_task *task) { - struct sas_internal *si = - to_sas_internal(task->dev->port->ha->core.shost->transportt); + struct sas_internal *si = dev_to_sas_internal(task->dev); unsigned long flags; int res; @@ -425,8 +468,7 @@ static void sas_ata_post_internal(struct ata_queued_cmd *qc) static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev) { struct domain_device *dev = ap->private_data; - struct sas_internal *i = - to_sas_internal(dev->port->ha->core.shost->transportt); + struct sas_internal *i = dev_to_sas_internal(dev); if (i->dft->lldd_ata_set_dmamode) i->dft->lldd_ata_set_dmamode(dev); diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 7c59f97c0287..32e417e6c2f7 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -125,7 +125,11 @@ static int smp_execute_task(struct domain_device *dev, void *req, int req_size, task->task_status.stat == SAS_DATA_OVERRUN) { res = -EMSGSIZE; break; - } else { + } + if (task->task_status.resp == SAS_TASK_UNDELIVERED && + task->task_status.stat == SAS_DEVICE_UNKNOWN) + break; + else { SAS_DPRINTK("%s: task to dev %016llx response: 0x%x " "status 0x%x\n", __func__, SAS_ADDR(dev->sas_addr), @@ -1648,8 +1652,8 @@ static int sas_get_phy_change_count(struct domain_device *dev, return res; } -static int sas_get_phy_attached_sas_addr(struct domain_device *dev, - int phy_id, u8 *attached_sas_addr) +int sas_get_phy_attached_sas_addr(struct domain_device *dev, int phy_id, + u8 *attached_sas_addr) { int res; struct smp_resp *disc_resp; diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 9e960b2d535a..a9a3bb94c1bc 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -89,7 +89,8 @@ int sas_smp_get_phy_events(struct sas_phy *phy); struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy); struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id); - +int sas_get_phy_attached_sas_addr(struct domain_device *dev, int phy_id, + u8 *attached_sas_addr); void sas_hae_reset(struct work_struct *work); void sas_free_device(struct kref *kref); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 18704a2e4f07..2079b18467a1 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -615,6 +615,7 @@ struct sas_domain_function_template { int (*lldd_clear_task_set)(struct domain_device *, u8 *lun); int (*lldd_I_T_nexus_reset)(struct domain_device *); int (*lldd_ata_soft_reset)(struct domain_device *); + int (*lldd_ata_check_ready)(struct domain_device *); void (*lldd_ata_set_dmamode)(struct domain_device *); int (*lldd_lu_reset)(struct domain_device *, u8 *lun); int (*lldd_query_task)(struct sas_task *); -- cgit v1.2.3-59-g8ed1b From f41a0c441c3fe43e79ebeb75584dbb5bfa83e5cd Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Wed, 21 Dec 2011 21:33:17 -0800 Subject: [SCSI] libsas: fix sas_find_local_phy(), take phy references In the direct-attached case this routine returns the phy on which this device was first discovered. Which is broken if we want to support wide-targets, as this phy reference can become stale even though the port is still active. In the expander-attached case this routine tries to lookup the phy by scanning the attached sas addresses of the parent expander, and BUG_ONs if it can't find it. However since eh and the libsas workqueue run independently we can still be attempting device recovery via eh after libsas has recorded the device as detached. This is even easier to hit now that eh is blocked while device domain rediscovery takes place, and that libata is fed more timed out commands increasing the chances that it will try to recover the ata device. Arrange for dev->phy to always point to a last known good phy, it may be stale after the port is torn down, but it will catch up for wide port reconfigurations, and never be NULL. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/aic94xx/aic94xx_tmf.c | 9 ++++++--- drivers/scsi/isci/task.c | 9 +++++---- drivers/scsi/libsas/sas_ata.c | 7 +++++-- drivers/scsi/libsas/sas_discover.c | 24 +++++++++++++++++++++++ drivers/scsi/libsas/sas_expander.c | 5 ++++- drivers/scsi/libsas/sas_internal.h | 1 + drivers/scsi/libsas/sas_port.c | 7 +++---- drivers/scsi/libsas/sas_scsi_host.c | 38 ++++++++++++++++++------------------- drivers/scsi/mvsas/mv_sas.c | 3 ++- drivers/scsi/pm8001/pm8001_sas.c | 19 ++++++++++++------- drivers/scsi/scsi_transport_sas.c | 23 ++++++++++++++++++++++ include/scsi/libsas.h | 9 +++++++-- include/scsi/scsi_transport_sas.h | 6 ++++++ 13 files changed, 116 insertions(+), 44 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/aic94xx/aic94xx_tmf.c b/drivers/scsi/aic94xx/aic94xx_tmf.c index 0add73bdf2a4..50b914ffab94 100644 --- a/drivers/scsi/aic94xx/aic94xx_tmf.c +++ b/drivers/scsi/aic94xx/aic94xx_tmf.c @@ -181,7 +181,7 @@ static int asd_clear_nexus_I_T(struct domain_device *dev, int asd_I_T_nexus_reset(struct domain_device *dev) { int res, tmp_res, i; - struct sas_phy *phy = sas_find_local_phy(dev); + struct sas_phy *phy = sas_get_local_phy(dev); /* Standard mandates link reset for ATA (type 0) and * hard reset for SSP (type 1) */ int reset_type = (dev->dev_type == SATA_DEV || @@ -201,7 +201,7 @@ int asd_I_T_nexus_reset(struct domain_device *dev) for (i = 0 ; i < 3; i++) { tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME); if (tmp_res == TC_RESUME) - return res; + goto out; msleep(500); } @@ -211,7 +211,10 @@ int asd_I_T_nexus_reset(struct domain_device *dev) dev_printk(KERN_ERR, &phy->dev, "Failed to resume nexus after reset 0x%x\n", tmp_res); - return TMF_RESP_FUNC_FAILED; + res = TMF_RESP_FUNC_FAILED; + out: + sas_put_local_phy(phy); + return res; } static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun) diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c index 4bd88ef83cdf..b96e6044eda9 100644 --- a/drivers/scsi/isci/task.c +++ b/drivers/scsi/isci/task.c @@ -1332,7 +1332,7 @@ isci_task_request_complete(struct isci_host *ihost, static int isci_reset_device(struct isci_host *ihost, struct isci_remote_device *idev) { - struct sas_phy *phy = sas_find_local_phy(idev->domain_dev); + struct sas_phy *phy = sas_get_local_phy(idev->domain_dev); enum sci_status status; unsigned long flags; int rc; @@ -1347,8 +1347,8 @@ static int isci_reset_device(struct isci_host *ihost, dev_dbg(&ihost->pdev->dev, "%s: sci_remote_device_reset(%p) returned %d!\n", __func__, idev, status); - - return TMF_RESP_FUNC_FAILED; + rc = TMF_RESP_FUNC_FAILED; + goto out; } spin_unlock_irqrestore(&ihost->scic_lock, flags); @@ -1369,7 +1369,8 @@ static int isci_reset_device(struct isci_host *ihost, } dev_dbg(&ihost->pdev->dev, "%s: idev %p complete.\n", __func__, idev); - + out: + sas_put_local_phy(phy); return rc; } diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 5fdb63ad94b7..92f7e78a096c 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -284,9 +284,10 @@ static int smp_ata_check_ready(struct ata_link *link) struct ata_port *ap = link->ap; struct domain_device *dev = ap->private_data; struct domain_device *ex_dev = dev->parent; - struct sas_phy *phy = sas_find_local_phy(dev); + struct sas_phy *phy = sas_get_local_phy(dev); res = sas_get_phy_attached_sas_addr(ex_dev, phy->number, addr); + sas_put_local_phy(phy); /* break the wait early if the expander is unreachable, * otherwise keep polling */ @@ -319,10 +320,10 @@ static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, unsigned long deadline) { int ret = 0, res; + struct sas_phy *phy; struct ata_port *ap = link->ap; int (*check_ready)(struct ata_link *link); struct domain_device *dev = ap->private_data; - struct sas_phy *phy = sas_find_local_phy(dev); struct sas_internal *i = dev_to_sas_internal(dev); res = i->dft->lldd_I_T_nexus_reset(dev); @@ -330,10 +331,12 @@ static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, if (res != TMF_RESP_FUNC_COMPLETE) SAS_DPRINTK("%s: Unable to reset ata device?\n", __func__); + phy = sas_get_local_phy(dev); if (scsi_is_sas_phy_local(phy)) check_ready = local_ata_check_ready; else check_ready = smp_ata_check_ready; + sas_put_local_phy(phy); ret = ata_wait_after_reset(link, deadline, check_ready); if (ret && ret != -EAGAIN) diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index c56cc6400819..789b50861bb9 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -147,6 +147,7 @@ static int sas_get_port_device(struct asd_sas_port *port) memset(port->disc.eeds_a, 0, SAS_ADDR_SIZE); memset(port->disc.eeds_b, 0, SAS_ADDR_SIZE); port->disc.max_level = 0; + sas_device_set_phy(dev, port->port); dev->rphy = rphy; @@ -234,6 +235,9 @@ void sas_free_device(struct kref *kref) if (dev->parent) sas_put_device(dev->parent); + sas_port_put_phy(dev->phy); + dev->phy = NULL; + /* remove the phys and ports, everything else should be gone */ if (dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV) kfree(dev->ex_dev.ex_phy); @@ -308,6 +312,26 @@ void sas_unregister_domain_devices(struct asd_sas_port *port) } +void sas_device_set_phy(struct domain_device *dev, struct sas_port *port) +{ + struct sas_ha_struct *ha; + struct sas_phy *new_phy; + + if (!dev) + return; + + ha = dev->port->ha; + new_phy = sas_port_get_phy(port); + + /* pin and record last seen phy */ + spin_lock_irq(&ha->phy_port_lock); + if (new_phy) { + sas_port_put_phy(dev->phy); + dev->phy = new_phy; + } + spin_unlock_irq(&ha->phy_port_lock); +} + /* ---------- Discovery and Revalidation ---------- */ /** diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 6fb1f3afd1e0..68a80a00f73f 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -723,6 +723,7 @@ static struct domain_device *sas_ex_discover_end_dev( } } sas_ex_get_linkrate(parent, child, phy); + sas_device_set_phy(child, phy->port); #ifdef CONFIG_SCSI_SAS_ATA if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { @@ -1810,7 +1811,7 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent, { struct expander_device *ex_dev = &parent->ex_dev; struct ex_phy *phy = &ex_dev->ex_phy[phy_id]; - struct domain_device *child, *n; + struct domain_device *child, *n, *found = NULL; if (last) { list_for_each_entry_safe(child, n, &ex_dev->children, siblings) { @@ -1822,6 +1823,7 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent, sas_unregister_ex_tree(parent->port, child); else sas_unregister_dev(parent->port, child); + found = child; break; } } @@ -1830,6 +1832,7 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent, memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); if (phy->port) { sas_port_delete_phy(phy->port, phy->phy); + sas_device_set_phy(found, phy->port); if (phy->port->num_phys == 0) sas_port_delete(phy->port); phy->port = NULL; diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index a9a3bb94c1bc..c8febc71c40d 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -87,6 +87,7 @@ 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); +void sas_device_set_phy(struct domain_device *dev, struct sas_port *port); struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy); struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id); int sas_get_phy_attached_sas_addr(struct domain_device *dev, int phy_id, diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c index 2980bde4e34a..31adcd1b4191 100644 --- a/drivers/scsi/libsas/sas_port.c +++ b/drivers/scsi/libsas/sas_port.c @@ -108,9 +108,6 @@ static void sas_form_port(struct asd_sas_phy *phy) 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, @@ -175,8 +172,10 @@ void sas_deform_port(struct asd_sas_phy *phy, int gone) sas_unregister_domain_devices(port); sas_port_delete(port->port); port->port = NULL; - } else + } else { sas_port_delete_phy(port->port, phy->phy); + sas_device_set_phy(dev, port->port); + } if (si->dft->lldd_port_deformed) si->dft->lldd_port_deformed(phy); diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 5cc44fddfe95..94ef76316c31 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -439,30 +439,26 @@ static int sas_recover_I_T(struct domain_device *dev) return res; } -/* Find the sas_phy that's attached to this device */ -struct sas_phy *sas_find_local_phy(struct domain_device *dev) +/* take a reference on the last known good phy for this device */ +struct sas_phy *sas_get_local_phy(struct domain_device *dev) { - struct domain_device *pdev = dev->parent; - struct ex_phy *exphy = NULL; - int i; + struct sas_ha_struct *ha = dev->port->ha; + struct sas_phy *phy; + unsigned long flags; - /* Directly attached device */ - if (!pdev) - return dev->port->phy; + /* a published domain device always has a valid phy, it may be + * stale, but it is never NULL + */ + BUG_ON(!dev->phy); - /* Otherwise look in the expander */ - for (i = 0; i < pdev->ex_dev.num_phys; i++) - if (!memcmp(dev->sas_addr, - pdev->ex_dev.ex_phy[i].attached_sas_addr, - SAS_ADDR_SIZE)) { - exphy = &pdev->ex_dev.ex_phy[i]; - break; - } + spin_lock_irqsave(&ha->phy_port_lock, flags); + phy = dev->phy; + get_device(&phy->dev); + spin_unlock_irqrestore(&ha->phy_port_lock, flags); - BUG_ON(!exphy); - return exphy->phy; + return phy; } -EXPORT_SYMBOL_GPL(sas_find_local_phy); +EXPORT_SYMBOL_GPL(sas_get_local_phy); /* Attempt to send a LUN reset message to a device */ int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) @@ -489,7 +485,7 @@ int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd) { struct domain_device *dev = cmd_to_domain_dev(cmd); - struct sas_phy *phy = sas_find_local_phy(dev); + struct sas_phy *phy = sas_get_local_phy(dev); int res; res = sas_phy_reset(phy, 1); @@ -497,6 +493,8 @@ int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd) SAS_DPRINTK("Bus reset of %s failed 0x%x\n", kobject_name(&phy->dev.kobj), res); + sas_put_local_phy(phy); + if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) return SUCCESS; diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index cd882230591f..b68a65390f0d 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -1474,10 +1474,11 @@ static int mvs_debug_issue_ssp_tmf(struct domain_device *dev, static int mvs_debug_I_T_nexus_reset(struct domain_device *dev) { int rc; - struct sas_phy *phy = sas_find_local_phy(dev); + struct sas_phy *phy = sas_get_local_phy(dev); int reset_type = (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1; rc = sas_phy_reset(phy, reset_type); + sas_put_local_phy(phy); msleep(2000); return rc; } diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index 310860e37d98..3b11edd4a50c 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -967,12 +967,14 @@ int pm8001_I_T_nexus_reset(struct domain_device *dev) pm8001_dev = dev->lldd_dev; pm8001_ha = pm8001_find_ha_by_dev(dev); - phy = sas_find_local_phy(dev); + phy = sas_get_local_phy(dev); if (dev_is_sata(dev)) { DECLARE_COMPLETION_ONSTACK(completion_setstate); - if (scsi_is_sas_phy_local(phy)) - return 0; + if (scsi_is_sas_phy_local(phy)) { + rc = 0; + goto out; + } rc = sas_phy_reset(phy, 1); msleep(2000); rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , @@ -981,12 +983,14 @@ int pm8001_I_T_nexus_reset(struct domain_device *dev) rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha, pm8001_dev, 0x01); wait_for_completion(&completion_setstate); - } else{ - rc = sas_phy_reset(phy, 1); - msleep(2000); + } else { + rc = sas_phy_reset(phy, 1); + msleep(2000); } PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n", pm8001_dev->device_id, rc)); + out: + sas_put_local_phy(phy); return rc; } @@ -998,10 +1002,11 @@ int pm8001_lu_reset(struct domain_device *dev, u8 *lun) struct pm8001_device *pm8001_dev = dev->lldd_dev; struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev); if (dev_is_sata(dev)) { - struct sas_phy *phy = sas_find_local_phy(dev); + struct sas_phy *phy = sas_get_local_phy(dev); rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev , dev, 1, 0); rc = sas_phy_reset(phy, 1); + sas_put_local_phy(phy); rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha, pm8001_dev, 0x01); msleep(2000); diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index ab3bd0b5ffd9..7d69a25d2004 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -1059,6 +1059,29 @@ int scsi_is_sas_port(const struct device *dev) } EXPORT_SYMBOL(scsi_is_sas_port); +/** + * sas_port_get_phy - try to take a reference on a port member + * @port: port to check + */ +struct sas_phy *sas_port_get_phy(struct sas_port *port) +{ + struct sas_phy *phy; + + mutex_lock(&port->phy_list_mutex); + if (list_empty(&port->phy_list)) + phy = NULL; + else { + struct list_head *ent = port->phy_list.next; + + phy = list_entry(ent, typeof(*phy), port_siblings); + get_device(&phy->dev); + } + mutex_unlock(&port->phy_list_mutex); + + return phy; +} +EXPORT_SYMBOL(sas_port_get_phy); + /** * sas_port_add_phy - add another phy to a port to form a wide port * @port: port to add the phy to diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 2079b18467a1..55bab8633807 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -192,6 +192,7 @@ struct domain_device { struct domain_device *parent; struct list_head siblings; /* devices on the same level */ struct asd_sas_port *port; /* shortcut to root of the tree */ + struct sas_phy *phy; struct list_head dev_list_node; struct list_head disco_list_node; /* awaiting probe or destruct */ @@ -243,7 +244,6 @@ struct asd_sas_port { struct list_head destroy_list; enum sas_linkrate linkrate; - struct sas_phy *phy; struct work_struct work; /* public: */ @@ -429,6 +429,11 @@ static inline unsigned int to_sas_gpio_od(int device, int bit) return 3 * device + bit; } +static inline void sas_put_local_phy(struct sas_phy *phy) +{ + put_device(&phy->dev); +} + #ifdef CONFIG_SCSI_SAS_HOST_SMP int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count); #else @@ -684,7 +689,7 @@ extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, extern void sas_ssp_task_response(struct device *dev, struct sas_task *task, struct ssp_response_iu *iu); -struct sas_phy *sas_find_local_phy(struct domain_device *dev); +struct sas_phy *sas_get_local_phy(struct domain_device *dev); int sas_request_addr(struct Scsi_Host *shost, u8 *addr); diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index 42817facaeda..98b3a20a0102 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -209,6 +209,12 @@ void sas_port_add_phy(struct sas_port *, struct sas_phy *); void sas_port_delete_phy(struct sas_port *, struct sas_phy *); void sas_port_mark_backlink(struct sas_port *); int scsi_is_sas_port(const struct device *); +struct sas_phy *sas_port_get_phy(struct sas_port *port); +static inline void sas_port_put_phy(struct sas_phy *phy) +{ + if (phy) + put_device(&phy->dev); +} extern struct scsi_transport_template * sas_attach_transport(struct sas_function_template *); -- cgit v1.2.3-59-g8ed1b From ab5266335ba1a43461443f9823276a2b44dd1ba7 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Wed, 11 Jan 2012 13:13:44 -0800 Subject: [SCSI] libsas: route local link resets through ata-eh Similar to the conversion of the transport-class reset we want bsg initiated resets to be managed by libata. Reported-by: Jacek Danecki Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_host_smp.c | 11 +++++++++- drivers/scsi/libsas/sas_init.c | 45 ++++++++++++++++++++++---------------- drivers/scsi/libsas/sas_internal.h | 1 + 3 files changed, 37 insertions(+), 20 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_host_smp.c b/drivers/scsi/libsas/sas_host_smp.c index bb8f49269a68..e921e5321764 100644 --- a/drivers/scsi/libsas/sas_host_smp.c +++ b/drivers/scsi/libsas/sas_host_smp.c @@ -187,11 +187,14 @@ static void sas_phy_control(struct sas_ha_struct *sas_ha, u8 phy_id, struct sas_internal *i = to_sas_internal(sas_ha->core.shost->transportt); struct sas_phy_linkrates rates; + struct asd_sas_phy *asd_phy; if (phy_id >= sas_ha->num_phys) { resp_data[2] = SMP_RESP_NO_PHY; return; } + + asd_phy = sas_ha->sas_phy[phy_id]; switch (phy_op) { case PHY_FUNC_NOP: case PHY_FUNC_LINK_RESET: @@ -210,7 +213,13 @@ static void sas_phy_control(struct sas_ha_struct *sas_ha, u8 phy_id, rates.minimum_linkrate = min; rates.maximum_linkrate = max; - if (i->dft->lldd_control_phy(sas_ha->sas_phy[phy_id], phy_op, &rates)) + /* filter reset requests through libata eh */ + if (phy_op == PHY_FUNC_LINK_RESET && sas_try_ata_reset(asd_phy) == 0) { + resp_data[2] = SMP_RESP_FUNC_ACC; + return; + } + + if (i->dft->lldd_control_phy(asd_phy, phy_op, &rates)) resp_data[2] = SMP_RESP_FUNC_FAILED; else resp_data[2] = SMP_RESP_FUNC_ACC; diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index cf1b532b0e76..dc93e1181469 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -196,6 +196,27 @@ static int sas_get_linkerrors(struct sas_phy *phy) return sas_smp_get_phy_events(phy); } +int sas_try_ata_reset(struct asd_sas_phy *asd_phy) +{ + struct domain_device *dev = NULL; + + /* try to route user requested link resets through libata */ + if (asd_phy->port) + dev = asd_phy->port->port_dev; + + /* validate that dev has been probed */ + if (dev) + dev = sas_find_dev_by_rphy(dev->rphy); + + if (dev && dev_is_sata(dev)) { + sas_ata_schedule_reset(dev); + sas_ata_wait_eh(dev); + return 0; + } + + return -ENODEV; +} + /** * transport_sas_phy_reset - reset a phy and permit libata to manage the link * @@ -204,7 +225,6 @@ static int sas_get_linkerrors(struct sas_phy *phy) */ static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset) { - int ret; enum phy_func reset_type; if (hard_reset) @@ -218,21 +238,10 @@ static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset) struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number]; struct sas_internal *i = to_sas_internal(sas_ha->core.shost->transportt); - struct domain_device *dev = NULL; - - if (asd_phy->port) - dev = asd_phy->port->port_dev; - - /* validate that dev has been probed */ - if (dev) - dev = sas_find_dev_by_rphy(dev->rphy); - if (dev && dev_is_sata(dev) && !hard_reset) { - sas_ata_schedule_reset(dev); - sas_ata_wait_eh(dev); - ret = 0; - } else - ret = i->dft->lldd_control_phy(asd_phy, reset_type, NULL); + if (!hard_reset && sas_try_ata_reset(asd_phy) == 0) + return 0; + return i->dft->lldd_control_phy(asd_phy, reset_type, NULL); } else { struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent); struct domain_device *ddev = sas_find_dev_by_rphy(rphy); @@ -241,12 +250,10 @@ static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset) if (ata_dev && !hard_reset) { sas_ata_schedule_reset(ata_dev); sas_ata_wait_eh(ata_dev); - ret = 0; + return 0; } else - ret = sas_smp_phy_control(ddev, phy->number, reset_type, NULL); + return sas_smp_phy_control(ddev, phy->number, reset_type, NULL); } - - return ret; } static int sas_phy_enable(struct sas_phy *phy, int enable) diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index c8febc71c40d..4157f6e1eda2 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -92,6 +92,7 @@ struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy); struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id); int sas_get_phy_attached_sas_addr(struct domain_device *dev, int phy_id, u8 *attached_sas_addr); +int sas_try_ata_reset(struct asd_sas_phy *phy); void sas_hae_reset(struct work_struct *work); void sas_free_device(struct kref *kref); -- cgit v1.2.3-59-g8ed1b From 5d7f6d1071eadd020edb2cf366d358e0f6d0a0f9 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 12 Jan 2012 11:47:24 -0800 Subject: [SCSI] libsas: fix sas_unregister_ports vs sas_drain_work We need to hold drain_mutex across the unregistration as port down events queue device removal as chained events, so we need to make sure no other drainers are active. [ 1118.673968] WARNING: at kernel/workqueue.c:996 __queue_work+0x11a/0x326() [ 1118.681982] Hardware name: S2600CP [ 1118.686193] Modules linked in: isci(-) libsas scsi_transport_sas nls_utf8 ipv6 uinput sg iTCO_wdt iTCO_vendor_support i2c_i801 i2c_core ioatdma dca sd_mod sr_mod cdrom ahci libahci libata [last unloaded: scsi_transport_sas] [ 1118.709893] Pid: 6831, comm: rmmod Not tainted 3.2.0-isci+ #1 [ 1118.716727] Call Trace: [ 1118.719867] [] warn_slowpath_common+0x85/0x9d [ 1118.727000] [] warn_slowpath_null+0x1a/0x1c [ 1118.733942] [] __queue_work+0x11a/0x326 [ 1118.740481] [] queue_work_on+0x1b/0x22 [ 1118.746925] [] queue_work+0x37/0x3e [ 1118.753105] [] ? sas_discover_event+0x55/0x82 [libsas] [ 1118.761094] [] scsi_queue_work+0x42/0x44 [ 1118.767717] [] sas_discover_event+0x69/0x82 [libsas] [ 1118.775509] [] sas_unregister_dev+0xc3/0xcc [libsas] [ 1118.783319] [] sas_unregister_domain_devices+0x4a/0xc8 [libsas] [ 1118.792731] [] sas_deform_port+0x60/0x1a6 [libsas] [ 1118.800339] [] sas_unregister_ports+0x33/0x44 [libsas] [ 1118.808342] [] sas_unregister_ha+0x41/0x6b [libsas] [ 1118.816055] [] isci_unregister+0x22/0x4d [isci] [ 1118.823384] [] isci_pci_remove+0x2e/0x60 [isci] Reported-by: Jacek Danecki Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_event.c | 19 +++++++++++++------ drivers/scsi/libsas/sas_init.c | 18 +++++++++++------- drivers/scsi/libsas/sas_internal.h | 1 + 3 files changed, 25 insertions(+), 13 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_event.c b/drivers/scsi/libsas/sas_event.c index dbfaceeea0f7..16639bbae629 100644 --- a/drivers/scsi/libsas/sas_event.c +++ b/drivers/scsi/libsas/sas_event.c @@ -51,15 +51,11 @@ static void sas_queue_event(int event, unsigned long *pending, } } -int sas_drain_work(struct sas_ha_struct *ha) + +void __sas_drain_work(struct sas_ha_struct *ha) { struct workqueue_struct *wq = ha->core.shost->work_q; struct work_struct *w, *_w; - int err; - - err = mutex_lock_interruptible(&ha->drain_mutex); - if (err) - return err; set_bit(SAS_HA_DRAINING, &ha->state); /* flush submitters */ @@ -75,6 +71,17 @@ int sas_drain_work(struct sas_ha_struct *ha) sas_queue_work(ha, w); } spin_unlock_irq(&ha->state_lock); +} + +int sas_drain_work(struct sas_ha_struct *ha) +{ + int err; + + err = mutex_lock_interruptible(&ha->drain_mutex); + if (err) + return err; + if (test_bit(SAS_HA_REGISTERED, &ha->state)) + __sas_drain_work(ha); mutex_unlock(&ha->drain_mutex); return 0; diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index dc93e1181469..09c14ca3fbd5 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -160,18 +160,22 @@ Undo_phys: int sas_unregister_ha(struct sas_ha_struct *sas_ha) { - unsigned long flags; - /* Set the state to unregistered to avoid further unchained - * events to be queued + * events to be queued, and flush any in-progress drainers */ - spin_lock_irqsave(&sas_ha->state_lock, flags); + mutex_lock(&sas_ha->drain_mutex); + spin_lock_irq(&sas_ha->state_lock); clear_bit(SAS_HA_REGISTERED, &sas_ha->state); - spin_unlock_irqrestore(&sas_ha->state_lock, flags); - sas_drain_work(sas_ha); + spin_unlock_irq(&sas_ha->state_lock); + __sas_drain_work(sas_ha); + mutex_unlock(&sas_ha->drain_mutex); sas_unregister_ports(sas_ha); - sas_drain_work(sas_ha); + + /* flush unregistration work */ + mutex_lock(&sas_ha->drain_mutex); + __sas_drain_work(sas_ha); + mutex_unlock(&sas_ha->drain_mutex); if (sas_ha->lldd_max_execute_num > 1) { sas_shutdown_queue(sas_ha); diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 4157f6e1eda2..7818c4673c3a 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -70,6 +70,7 @@ int sas_init_events(struct sas_ha_struct *sas_ha); void sas_shutdown_queue(struct sas_ha_struct *sas_ha); void sas_disable_revalidation(struct sas_ha_struct *ha); void sas_enable_revalidation(struct sas_ha_struct *ha); +void __sas_drain_work(struct sas_ha_struct *ha); void sas_deform_port(struct asd_sas_phy *phy, int gone); -- cgit v1.2.3-59-g8ed1b From 354cf82980e2449e71fdaa3c6f170357ebd65467 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 12 Jan 2012 17:57:35 -0800 Subject: [SCSI] libsas: let libata recover links that fail to transmit initial sig-fis libsas fails to discover all sata devices in the domain. If a device fails negotiation and does not transmit a signature fis the link needs recovery. libata already understands how to manage slow to come up links, so treat these conditions as ata device attach events for the purposes of creating an ata_port. This allows libata to manage retrying link bring up. Rediscovery is modified to be careful about checking changes in dev_type. It looks like libsas leaks old devices if the sas address changes, but that's a fix for another patch. Acked-by: Jack Wang Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_ata.c | 71 +++++++++++++-- drivers/scsi/libsas/sas_discover.c | 1 + drivers/scsi/libsas/sas_expander.c | 178 +++++++++++++++++++++---------------- drivers/scsi/libsas/sas_internal.h | 6 +- include/scsi/sas.h | 4 +- include/scsi/sas_ata.h | 8 +- 6 files changed, 179 insertions(+), 89 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index ba1ebfe991d7..25008a42412f 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -278,26 +278,84 @@ static struct sas_internal *dev_to_sas_internal(struct domain_device *dev) return to_sas_internal(dev->port->ha->core.shost->transportt); } +static void sas_get_ata_command_set(struct domain_device *dev); + +int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy) +{ + if (phy->attached_tproto & SAS_PROTOCOL_STP) + dev->tproto = phy->attached_tproto; + if (phy->attached_sata_dev) + dev->tproto |= SATA_DEV; + + if (phy->attached_dev_type == SATA_PENDING) + dev->dev_type = SATA_PENDING; + else { + int res; + + dev->dev_type = SATA_DEV; + res = sas_get_report_phy_sata(dev->parent, phy->phy_id, + &dev->sata_dev.rps_resp); + if (res) { + SAS_DPRINTK("report phy sata to %016llx:0x%x returned " + "0x%x\n", SAS_ADDR(dev->parent->sas_addr), + phy->phy_id, res); + return res; + } + memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis, + sizeof(struct dev_to_host_fis)); + /* TODO switch to ata_dev_classify() */ + sas_get_ata_command_set(dev); + } + return 0; +} + +static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy) +{ + int res; + + /* we weren't pending, so successfully end the reset sequence now */ + if (dev->dev_type != SATA_PENDING) + return 1; + + /* hmmm, if this succeeds do we need to repost the domain_device to the + * lldd so it can pick up new parameters? + */ + res = sas_get_ata_info(dev, phy); + if (res) + return 0; /* retry */ + else + return 1; +} + static int smp_ata_check_ready(struct ata_link *link) { int res; - u8 addr[8]; struct ata_port *ap = link->ap; struct domain_device *dev = ap->private_data; struct domain_device *ex_dev = dev->parent; struct sas_phy *phy = sas_get_local_phy(dev); + struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number]; - res = sas_get_phy_attached_sas_addr(ex_dev, phy->number, addr); + res = sas_ex_phy_discover(ex_dev, phy->number); sas_put_local_phy(phy); + /* break the wait early if the expander is unreachable, * otherwise keep polling */ if (res == -ECOMM) return res; - if (res != SMP_RESP_FUNC_ACC || SAS_ADDR(addr) == 0) + if (res != SMP_RESP_FUNC_ACC) return 0; - else - return 1; + + switch (ex_phy->attached_dev_type) { + case SATA_PENDING: + return 0; + case SAS_END_DEV: + if (ex_phy->attached_sata_dev) + return sas_ata_clear_pending(dev, ex_phy); + default: + return -ENODEV; + } } static int local_ata_check_ready(struct ata_link *link) @@ -584,6 +642,9 @@ static void sas_get_ata_command_set(struct domain_device *dev) struct dev_to_host_fis *fis = (struct dev_to_host_fis *) dev->frame_rcvd; + if (dev->dev_type == SATA_PENDING) + return; + if ((fis->sector_count == 1 && /* ATA */ fis->lbal == 1 && fis->lbam == 0 && diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index c1ac99d25f5e..8bcfcaa7b2e1 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -48,6 +48,7 @@ void sas_init_dev(struct domain_device *dev) case SATA_DEV: case SATA_PM: case SATA_PM_PORT: + case SATA_PENDING: INIT_LIST_HEAD(&dev->sata_dev.children); break; default: diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 4b2ecd35dc5a..7e2d3c4c6171 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -183,13 +183,27 @@ static char sas_route_char(struct domain_device *dev, struct ex_phy *phy) } } -static void sas_set_ex_phy(struct domain_device *dev, int phy_id, - void *disc_resp) +static enum sas_dev_type to_dev_type(struct discover_resp *dr) { + /* This is detecting a failure to transmit initial dev to host + * FIS as described in section J.5 of sas-2 r16 + */ + if (dr->attached_dev_type == NO_DEVICE && dr->attached_sata_dev && + dr->linkrate >= SAS_LINK_RATE_1_5_GBPS) + return SATA_PENDING; + else + return dr->attached_dev_type; +} + +static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp) +{ + enum sas_dev_type dev_type; + enum sas_linkrate linkrate; + u8 sas_addr[SAS_ADDR_SIZE]; + struct smp_resp *resp = rsp; + struct discover_resp *dr = &resp->disc; struct expander_device *ex = &dev->ex_dev; struct ex_phy *phy = &ex->ex_phy[phy_id]; - struct smp_resp *resp = disc_resp; - struct discover_resp *dr = &resp->disc; struct sas_rphy *rphy = dev->rphy; bool new_phy = !phy->phy; char *type; @@ -213,8 +227,13 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id, break; } + /* check if anything important changed to squelch debug */ + dev_type = phy->attached_dev_type; + linkrate = phy->linkrate; + memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); + + phy->attached_dev_type = to_dev_type(dr); phy->phy_id = phy_id; - phy->attached_dev_type = dr->attached_dev_type; phy->linkrate = dr->linkrate; phy->attached_sata_host = dr->attached_sata_host; phy->attached_sata_dev = dr->attached_sata_dev; @@ -229,7 +248,7 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id, phy->last_da_index = -1; phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr); - phy->phy->identify.device_type = phy->attached_dev_type; + phy->phy->identify.device_type = dr->attached_dev_type; phy->phy->identify.initiator_port_protocols = phy->attached_iproto; phy->phy->identify.target_port_protocols = phy->attached_tproto; phy->phy->identify.phy_identifier = phy_id; @@ -246,6 +265,9 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id, } switch (phy->attached_dev_type) { + case SATA_PENDING: + type = "stp pending"; + break; case NO_DEVICE: type = "no device"; break; @@ -270,6 +292,16 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id, type = "unknown"; } + /* this routine is polled by libata error recovery so filter + * unimportant messages + */ + if (new_phy || phy->attached_dev_type != dev_type || + phy->linkrate != linkrate || + SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr)) + /* pass */; + else + return; + SAS_DPRINTK("ex %016llx phy%02d:%c:%X attached: %016llx (%s)\n", SAS_ADDR(dev->sas_addr), phy->phy_id, sas_route_char(dev, phy), phy->linkrate, @@ -304,50 +336,25 @@ struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id) static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req, u8 *disc_resp, int single) { - struct domain_device *ata_dev = sas_ex_to_ata(dev, single); - int i, res; + struct discover_resp *dr; + int res; disc_req[9] = single; - for (i = 1 ; i < 3; i++) { - struct discover_resp *dr; - res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, - disc_resp, DISCOVER_RESP_SIZE); - if (res) - return res; - dr = &((struct smp_resp *)disc_resp)->disc; - if (memcmp(dev->sas_addr, dr->attached_sas_addr, - SAS_ADDR_SIZE) == 0) { - sas_printk("Found loopback topology, just ignore it!\n"); - return 0; - } - - /* This is detecting a failure to transmit initial - * dev to host FIS as described in section J.5 of - * sas-2 r16 - */ - if (!(dr->attached_dev_type == 0 && - dr->attached_sata_dev)) - break; - - /* In order to generate the dev to host FIS, we send a - * link reset to the expander port. If a device was - * previously detected on this port we ask libata to - * manage the reset and link recovery. - */ - if (ata_dev) { - sas_ata_schedule_reset(ata_dev); - break; - } - sas_smp_phy_control(dev, single, PHY_FUNC_LINK_RESET, NULL); - /* Wait for the reset to trigger the negotiation */ - msleep(500); + res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE, + disc_resp, DISCOVER_RESP_SIZE); + if (res) + return res; + dr = &((struct smp_resp *)disc_resp)->disc; + if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) { + sas_printk("Found loopback topology, just ignore it!\n"); + return 0; } sas_set_ex_phy(dev, single, disc_resp); return 0; } -static int sas_ex_phy_discover(struct domain_device *dev, int single) +int sas_ex_phy_discover(struct domain_device *dev, int single) { struct expander_device *ex = &dev->ex_dev; int res = 0; @@ -652,9 +659,8 @@ int sas_smp_get_phy_events(struct sas_phy *phy) #define RPS_REQ_SIZE 16 #define RPS_RESP_SIZE 60 -static int sas_get_report_phy_sata(struct domain_device *dev, - int phy_id, - struct smp_resp *rps_resp) +int sas_get_report_phy_sata(struct domain_device *dev, int phy_id, + struct smp_resp *rps_resp) { int res; u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE); @@ -764,21 +770,9 @@ static struct domain_device *sas_ex_discover_end_dev( #ifdef CONFIG_SCSI_SAS_ATA if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) { - child->dev_type = SATA_DEV; - if (phy->attached_tproto & SAS_PROTOCOL_STP) - child->tproto = phy->attached_tproto; - if (phy->attached_sata_dev) - child->tproto |= SATA_DEV; - res = sas_get_report_phy_sata(parent, phy_id, - &child->sata_dev.rps_resp); - if (res) { - SAS_DPRINTK("report phy sata to %016llx:0x%x returned " - "0x%x\n", SAS_ADDR(parent->sas_addr), - phy_id, res); + res = sas_get_ata_info(child, phy); + if (res) goto out_free; - } - memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis, - sizeof(struct dev_to_host_fis)); rphy = sas_end_device_alloc(phy->port); if (unlikely(!rphy)) @@ -993,7 +987,8 @@ static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) if (ex_phy->attached_dev_type != SAS_END_DEV && ex_phy->attached_dev_type != FANOUT_DEV && - ex_phy->attached_dev_type != EDGE_DEV) { + ex_phy->attached_dev_type != EDGE_DEV && + ex_phy->attached_dev_type != SATA_PENDING) { SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx " "phy 0x%x\n", ex_phy->attached_dev_type, SAS_ADDR(dev->sas_addr), @@ -1019,6 +1014,7 @@ static int sas_ex_discover_dev(struct domain_device *dev, int phy_id) switch (ex_phy->attached_dev_type) { case SAS_END_DEV: + case SATA_PENDING: child = sas_ex_discover_end_dev(dev, phy_id); break; case FANOUT_DEV: @@ -1688,8 +1684,8 @@ static int sas_get_phy_change_count(struct domain_device *dev, return res; } -int sas_get_phy_attached_sas_addr(struct domain_device *dev, int phy_id, - u8 *attached_sas_addr) +static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id, + u8 *sas_addr, enum sas_dev_type *type) { int res; struct smp_resp *disc_resp; @@ -1701,10 +1697,11 @@ int sas_get_phy_attached_sas_addr(struct domain_device *dev, int phy_id, dr = &disc_resp->disc; res = sas_get_phy_discover(dev, phy_id, disc_resp); - if (!res) { - memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8); - if (dr->attached_dev_type == 0) - memset(attached_sas_addr, 0, 8); + if (res == 0) { + memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8); + *type = to_dev_type(dr); + if (*type == 0) + memset(sas_addr, 0, 8); } kfree(disc_resp); return res; @@ -1953,39 +1950,62 @@ out: return res; } +static bool dev_type_flutter(enum sas_dev_type new, enum sas_dev_type old) +{ + if (old == new) + return true; + + /* treat device directed resets as flutter, if we went + * SAS_END_DEV to SATA_PENDING the link needs recovery + */ + if ((old == SATA_PENDING && new == SAS_END_DEV) || + (old == SAS_END_DEV && new == SATA_PENDING)) + return true; + + return false; +} + static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last) { struct expander_device *ex = &dev->ex_dev; struct ex_phy *phy = &ex->ex_phy[phy_id]; - u8 attached_sas_addr[8]; + enum sas_dev_type type = NO_DEVICE; + u8 sas_addr[8]; int res; - res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr); + res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type); switch (res) { case SMP_RESP_NO_PHY: phy->phy_state = PHY_NOT_PRESENT; sas_unregister_devs_sas_addr(dev, phy_id, last); - goto out; break; + return res; case SMP_RESP_PHY_VACANT: phy->phy_state = PHY_VACANT; sas_unregister_devs_sas_addr(dev, phy_id, last); - goto out; break; + return res; case SMP_RESP_FUNC_ACC: break; } - if (SAS_ADDR(attached_sas_addr) == 0) { + if (SAS_ADDR(sas_addr) == 0) { phy->phy_state = PHY_EMPTY; sas_unregister_devs_sas_addr(dev, phy_id, last); - } else if (SAS_ADDR(attached_sas_addr) == - SAS_ADDR(phy->attached_sas_addr)) { - SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n", - SAS_ADDR(dev->sas_addr), phy_id); + return res; + } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) && + dev_type_flutter(type, phy->attached_dev_type)) { + struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id); + char *action = ""; + sas_ex_phy_discover(dev, phy_id); - } else - res = sas_discover_new(dev, phy_id); -out: - return res; + + if (ata_dev && phy->attached_dev_type == SATA_PENDING) + action = ", needs recovery"; + SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n", + SAS_ADDR(dev->sas_addr), phy_id, action); + return res; + } + + return sas_discover_new(dev, phy_id); } /** diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 7818c4673c3a..e028d7a44202 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -91,8 +91,9 @@ int sas_smp_get_phy_events(struct sas_phy *phy); void sas_device_set_phy(struct domain_device *dev, struct sas_port *port); struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy); struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id); -int sas_get_phy_attached_sas_addr(struct domain_device *dev, int phy_id, - u8 *attached_sas_addr); +int sas_ex_phy_discover(struct domain_device *dev, int single); +int sas_get_report_phy_sata(struct domain_device *dev, int phy_id, + struct smp_resp *rps_resp); int sas_try_ata_reset(struct asd_sas_phy *phy); void sas_hae_reset(struct work_struct *work); @@ -122,6 +123,7 @@ static inline void sas_fill_in_rphy(struct domain_device *dev, case SATA_DEV: /* FIXME: need sata device type */ case SAS_END_DEV: + case SATA_PENDING: rphy->identify.device_type = SAS_END_DEVICE; break; case EDGE_DEV: diff --git a/include/scsi/sas.h b/include/scsi/sas.h index 3673d685e6ad..a577a833603d 100644 --- a/include/scsi/sas.h +++ b/include/scsi/sas.h @@ -89,8 +89,7 @@ enum sas_oob_mode { SAS_OOB_MODE }; -/* See sas_discover.c if you plan on changing these. - */ +/* See sas_discover.c if you plan on changing these */ enum sas_dev_type { NO_DEVICE = 0, /* protocol */ SAS_END_DEV = 1, /* protocol */ @@ -100,6 +99,7 @@ enum sas_dev_type { SATA_DEV = 5, SATA_PM = 7, SATA_PM_PORT= 8, + SATA_PENDING = 9, }; enum sas_protocol { diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h index cb724fd010f6..0ca2f8a6bc60 100644 --- a/include/scsi/sas_ata.h +++ b/include/scsi/sas_ata.h @@ -33,9 +33,10 @@ static inline int dev_is_sata(struct domain_device *dev) { return dev->dev_type == SATA_DEV || dev->dev_type == SATA_PM || - dev->dev_type == SATA_PM_PORT; + dev->dev_type == SATA_PM_PORT || dev->dev_type == SATA_PENDING; } +int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy); int sas_ata_init_host_and_port(struct domain_device *found_dev, struct scsi_target *starget); @@ -82,6 +83,11 @@ static inline void sas_ata_schedule_reset(struct domain_device *dev) static inline void sas_ata_wait_eh(struct domain_device *dev) { } + +static inline int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy) +{ + return 0; +} #endif #endif /* _SAS_ATA_H_ */ -- cgit v1.2.3-59-g8ed1b From 9508a66f898d46e726a318469312b45e0b1d078b Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Wed, 18 Jan 2012 20:47:01 -0800 Subject: [SCSI] libsas: async ata scanning libsas ata error handling is already async but this does not help the scan case. Move initial link recovery out from under host->scan_mutex, and delay synchronization with eh until after all port probe/recovery work has been queued. Device ordering is maintained with scan order by still calling sas_rphy_add() in order of domain discovery. Since we now scan the domain list when invoking libata-eh we need to be careful to check for fully initialized ata ports. Acked-by: Jack Wang Acked-by: Jeff Garzik Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/ata/libata-core.c | 34 +++++++++-------- drivers/ata/libata-scsi.c | 13 +++++++ drivers/ata/libata.h | 1 + drivers/scsi/aic94xx/aic94xx_init.c | 1 - drivers/scsi/isci/init.c | 1 - drivers/scsi/libsas/sas_ata.c | 74 +++++++++++++++++++++++++++++++------ drivers/scsi/libsas/sas_discover.c | 22 +++++------ drivers/scsi/libsas/sas_internal.h | 9 +++++ drivers/scsi/libsas/sas_scsi_host.c | 18 --------- drivers/scsi/mvsas/mv_init.c | 1 - drivers/scsi/pm8001/pm8001_init.c | 1 - include/linux/libata.h | 1 + include/scsi/libsas.h | 1 - include/scsi/sas_ata.h | 12 +++--- 14 files changed, 123 insertions(+), 66 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index c06e0ec11556..e0bda9ff89cd 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5936,29 +5936,31 @@ void ata_host_init(struct ata_host *host, struct device *dev, host->ops = ops; } -int ata_port_probe(struct ata_port *ap) +void __ata_port_probe(struct ata_port *ap) { - int rc = 0; + struct ata_eh_info *ehi = &ap->link.eh_info; + unsigned long flags; - /* probe */ - if (ap->ops->error_handler) { - struct ata_eh_info *ehi = &ap->link.eh_info; - unsigned long flags; + /* kick EH for boot probing */ + spin_lock_irqsave(ap->lock, flags); - /* kick EH for boot probing */ - spin_lock_irqsave(ap->lock, flags); + ehi->probe_mask |= ATA_ALL_DEVICES; + ehi->action |= ATA_EH_RESET; + ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; - ehi->probe_mask |= ATA_ALL_DEVICES; - ehi->action |= ATA_EH_RESET; - ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; + ap->pflags &= ~ATA_PFLAG_INITIALIZING; + ap->pflags |= ATA_PFLAG_LOADING; + ata_port_schedule_eh(ap); - ap->pflags &= ~ATA_PFLAG_INITIALIZING; - ap->pflags |= ATA_PFLAG_LOADING; - ata_port_schedule_eh(ap); + spin_unlock_irqrestore(ap->lock, flags); +} - spin_unlock_irqrestore(ap->lock, flags); +int ata_port_probe(struct ata_port *ap) +{ + int rc = 0; - /* wait for EH to finish */ + if (ap->ops->error_handler) { + __ata_port_probe(ap); ata_port_wait_eh(ap); } else { DPRINTK("ata%u: bus probe begin\n", ap->print_id); diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 508a60bfe5c1..1ee00c8b5b04 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -3838,6 +3838,19 @@ void ata_sas_port_stop(struct ata_port *ap) } EXPORT_SYMBOL_GPL(ata_sas_port_stop); +int ata_sas_async_port_init(struct ata_port *ap) +{ + int rc = ap->ops->port_start(ap); + + if (!rc) { + ap->print_id = ata_print_id++; + __ata_port_probe(ap); + } + + return rc; +} +EXPORT_SYMBOL_GPL(ata_sas_async_port_init); + /** * ata_sas_port_init - Initialize a SATA device * @ap: SATA port to initialize diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 1fab235ee516..2e26fcaf635b 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -105,6 +105,7 @@ extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg); extern struct ata_port *ata_port_alloc(struct ata_host *host); extern const char *sata_spd_string(unsigned int spd); extern int ata_port_probe(struct ata_port *ap); +extern void __ata_port_probe(struct ata_port *ap); /* libata-acpi.c */ #ifdef CONFIG_ATA_ACPI diff --git a/drivers/scsi/aic94xx/aic94xx_init.c b/drivers/scsi/aic94xx/aic94xx_init.c index eea988a04f92..ff80552ead84 100644 --- a/drivers/scsi/aic94xx/aic94xx_init.c +++ b/drivers/scsi/aic94xx/aic94xx_init.c @@ -81,7 +81,6 @@ static struct scsi_host_template aic94xx_sht = { .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_bus_reset_handler = sas_eh_bus_reset_handler, - .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, }; diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c index c3fe39bcacd5..c9af456e7dfe 100644 --- a/drivers/scsi/isci/init.c +++ b/drivers/scsi/isci/init.c @@ -165,7 +165,6 @@ static struct scsi_host_template isci_sht = { .sg_tablesize = SG_ALL, .max_sectors = SCSI_DEFAULT_MAX_SECTORS, .use_clustering = ENABLE_CLUSTERING, - .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = isci_host_attrs, diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index a9ec1643ee93..eb8b77c86169 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -585,11 +585,10 @@ static struct ata_port_info sata_port_info = { .port_ops = &sas_sata_ops }; -int sas_ata_init_host_and_port(struct domain_device *found_dev, - struct scsi_target *starget) +int sas_ata_init_host_and_port(struct domain_device *found_dev) { - struct Scsi_Host *shost = dev_to_shost(&starget->dev); - struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); + struct sas_ha_struct *ha = found_dev->port->ha; + struct Scsi_Host *shost = ha->core.shost; struct ata_port *ap; ata_host_init(&found_dev->sata_dev.ata_host, @@ -607,6 +606,8 @@ int sas_ata_init_host_and_port(struct domain_device *found_dev, ap->private_data = found_dev; ap->cbl = ATA_CBL_SATA; ap->scsi_host = shost; + /* publish initialized ata port */ + smp_wmb(); found_dev->sata_dev.ap = ap; return 0; @@ -683,6 +684,38 @@ static void sas_get_ata_command_set(struct domain_device *dev) dev->sata_dev.command_set = ATAPI_COMMAND_SET; } +void sas_probe_sata(struct asd_sas_port *port) +{ + struct domain_device *dev, *n; + int err; + + mutex_lock(&port->ha->disco_mutex); + list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { + if (!dev_is_sata(dev)) + continue; + + err = sas_ata_init_host_and_port(dev); + if (err) + sas_fail_probe(dev, __func__, err); + else + ata_sas_async_port_init(dev->sata_dev.ap); + } + mutex_unlock(&port->ha->disco_mutex); + + list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { + if (!dev_is_sata(dev)) + continue; + + sas_ata_wait_eh(dev); + + /* if libata could not bring the link up, don't surface + * the device + */ + if (ata_dev_disabled(sas_to_ata_dev(dev))) + sas_fail_probe(dev, __func__, -ENODEV); + } +} + /** * sas_discover_sata -- discover an STP/SATA domain device * @dev: pointer to struct domain_device of interest @@ -724,11 +757,23 @@ static void async_sas_ata_eh(void *data, async_cookie_t cookie) sas_put_device(dev); } +static bool sas_ata_dev_eh_valid(struct domain_device *dev) +{ + struct ata_port *ap; + + if (!dev_is_sata(dev)) + return false; + ap = dev->sata_dev.ap; + /* consume fully initialized ata ports */ + smp_rmb(); + return !!ap; +} + void sas_ata_strategy_handler(struct Scsi_Host *shost) { - struct scsi_device *sdev; struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); LIST_HEAD(async); + int i; /* it's ok to defer revalidation events during ata eh, these * disks are in one of three states: @@ -740,14 +785,21 @@ void sas_ata_strategy_handler(struct Scsi_Host *shost) */ sas_disable_revalidation(sas_ha); - shost_for_each_device(sdev, shost) { - struct domain_device *ddev = sdev_to_domain_dev(sdev); - - if (!dev_is_sata(ddev)) - continue; + spin_lock_irq(&sas_ha->phy_port_lock); + for (i = 0; i < sas_ha->num_phys; i++) { + struct asd_sas_port *port = sas_ha->sas_port[i]; + struct domain_device *dev; - async_schedule_domain(async_sas_ata_eh, ddev, &async); + spin_lock(&port->dev_list_lock); + list_for_each_entry(dev, &port->dev_list, dev_list_node) { + if (!sas_ata_dev_eh_valid(dev)) + continue; + async_schedule_domain(async_sas_ata_eh, dev, &async); + } + spin_unlock(&port->dev_list_lock); } + spin_unlock_irq(&sas_ha->phy_port_lock); + async_synchronize_full_domain(&async); sas_enable_revalidation(sas_ha); diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index 18fa364aa00f..0d58a8beaa3d 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -207,22 +207,22 @@ static void sas_probe_devices(struct work_struct *work) clear_bit(DISCE_PROBE, &port->disc.pending); - list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { - int err; - + /* devices must be domain members before link recovery and probe */ + list_for_each_entry(dev, &port->disco_list, disco_list_node) { spin_lock_irq(&port->dev_list_lock); list_add_tail(&dev->dev_list_node, &port->dev_list); spin_unlock_irq(&port->dev_list_lock); + } - err = sas_rphy_add(dev->rphy); + sas_probe_sata(port); - if (err) { - SAS_DPRINTK("%s: for %s device %16llx returned %d\n", - __func__, dev->parent ? "exp-attached" : - "direct-attached", - SAS_ADDR(dev->sas_addr), err); - sas_unregister_dev(port, dev); - } else + list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { + int err; + + err = sas_rphy_add(dev->rphy); + if (err) + sas_fail_probe(dev, __func__, err); + else list_del_init(&dev->disco_list_node); } } diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index e028d7a44202..d0d9bf10f79c 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -113,6 +113,15 @@ static inline int sas_smp_host_handler(struct Scsi_Host *shost, } #endif +static inline void sas_fail_probe(struct domain_device *dev, const char *func, int err) +{ + SAS_DPRINTK("%s: for %s device %16llx returned %d\n", + func, dev->parent ? "exp-attached" : + "direct-attached", + SAS_ADDR(dev->sas_addr), err); + sas_unregister_dev(dev->port, dev); +} + static inline void sas_fill_in_rphy(struct domain_device *dev, struct sas_rphy *rphy) { diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index e58ca50517d5..3701ff7e7267 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -762,17 +762,10 @@ int sas_target_alloc(struct scsi_target *starget) { struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent); struct domain_device *found_dev = sas_find_dev_by_rphy(rphy); - int res; if (!found_dev) return -ENODEV; - if (dev_is_sata(found_dev)) { - res = sas_ata_init_host_and_port(found_dev, starget); - if (res) - return res; - } - kref_get(&found_dev->kref); starget->hostdata = found_dev; return 0; @@ -1012,16 +1005,6 @@ void sas_task_abort(struct sas_task *task) } } -int sas_slave_alloc(struct scsi_device *scsi_dev) -{ - struct domain_device *dev = sdev_to_domain_dev(scsi_dev); - - if (dev_is_sata(dev)) - return ata_sas_port_init(dev->sata_dev.ap); - - return 0; -} - void sas_target_destroy(struct scsi_target *starget) { struct domain_device *found_dev = starget->hostdata; @@ -1082,6 +1065,5 @@ EXPORT_SYMBOL_GPL(sas_task_abort); EXPORT_SYMBOL_GPL(sas_phy_reset); EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler); EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler); -EXPORT_SYMBOL_GPL(sas_slave_alloc); EXPORT_SYMBOL_GPL(sas_target_destroy); EXPORT_SYMBOL_GPL(sas_ioctl); diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c index d45878b31254..cc59dff3810b 100644 --- a/drivers/scsi/mvsas/mv_init.c +++ b/drivers/scsi/mvsas/mv_init.c @@ -73,7 +73,6 @@ static struct scsi_host_template mvs_sht = { .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_bus_reset_handler = sas_eh_bus_reset_handler, - .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = mvst_host_attrs, diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c index bd165ea61919..36efaa7c3a54 100644 --- a/drivers/scsi/pm8001/pm8001_init.c +++ b/drivers/scsi/pm8001/pm8001_init.c @@ -75,7 +75,6 @@ static struct scsi_host_template pm8001_sht = { .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = sas_eh_device_reset_handler, .eh_bus_reset_handler = sas_eh_bus_reset_handler, - .slave_alloc = sas_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = pm8001_host_attrs, diff --git a/include/linux/libata.h b/include/linux/libata.h index aa4270477563..42378d637ffb 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -996,6 +996,7 @@ extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, extern void ata_sas_port_destroy(struct ata_port *); extern struct ata_port *ata_sas_port_alloc(struct ata_host *, struct ata_port_info *, struct Scsi_Host *); +extern int ata_sas_async_port_init(struct ata_port *); extern int ata_sas_port_init(struct ata_port *); extern int ata_sas_port_start(struct ata_port *ap); extern void ata_sas_port_stop(struct ata_port *ap); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 4a42be34fad0..20153d58e4e6 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -646,7 +646,6 @@ int sas_phy_reset(struct sas_phy *phy, int hard_reset); int sas_queue_up(struct sas_task *task); extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *); extern int sas_target_alloc(struct scsi_target *); -extern int sas_slave_alloc(struct scsi_device *); extern int sas_slave_configure(struct scsi_device *); extern int sas_change_queue_depth(struct scsi_device *, int new_depth, int reason); diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h index 1556eff4cc44..cdccd2eb7b6c 100644 --- a/include/scsi/sas_ata.h +++ b/include/scsi/sas_ata.h @@ -37,15 +37,14 @@ static inline int dev_is_sata(struct domain_device *dev) } int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy); -int sas_ata_init_host_and_port(struct domain_device *found_dev, - struct scsi_target *starget); - +int sas_ata_init_host_and_port(struct domain_device *found_dev); void sas_ata_task_abort(struct sas_task *task); void sas_ata_strategy_handler(struct Scsi_Host *shost); void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q); void sas_ata_schedule_reset(struct domain_device *dev); void sas_ata_wait_eh(struct domain_device *dev); +void sas_probe_sata(struct asd_sas_port *port); #else @@ -53,8 +52,7 @@ static inline int dev_is_sata(struct domain_device *dev) { return 0; } -static inline int sas_ata_init_host_and_port(struct domain_device *found_dev, - struct scsi_target *starget) +static inline int sas_ata_init_host_and_port(struct domain_device *found_dev) { return 0; } @@ -79,6 +77,10 @@ static inline void sas_ata_wait_eh(struct domain_device *dev) { } +static inline void sas_probe_sata(struct asd_sas_port *port) +{ +} + static inline int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy) { return 0; -- cgit v1.2.3-59-g8ed1b From 899fcf40f3177697ccfb029d0484cb8ec09a51ca Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Sat, 28 Jan 2012 17:24:40 -0800 Subject: [SCSI] libsas: set attached device type and target protocols for local phys Before: $ cat /sys/class/sas_phy/phy-6\:3/device_type none $ cat /sys/class/sas_phy/phy-6\:3/target_port_protocols none After: $ cat /sys/class/sas_phy/phy-6\:3/device_type end device $ cat /sys/class/sas_phy/phy-6\:3/target_port_protocols sata Also downgrade the phy_list_lock to _irq instead of _irqsave since libsas will never call sas_get_port_device with interrupts disbled. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_discover.c | 12 ++++++++---- drivers/scsi/libsas/sas_internal.h | 17 +++++++++++++++++ drivers/scsi/libsas/sas_port.c | 2 ++ 3 files changed, 27 insertions(+), 4 deletions(-) (limited to 'drivers/scsi/libsas/sas_internal.h') diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c index 0d58a8beaa3d..364679675602 100644 --- a/drivers/scsi/libsas/sas_discover.c +++ b/drivers/scsi/libsas/sas_discover.c @@ -69,7 +69,6 @@ void sas_init_dev(struct domain_device *dev) */ static int sas_get_port_device(struct asd_sas_port *port) { - unsigned long flags; struct asd_sas_phy *phy; struct sas_rphy *rphy; struct domain_device *dev; @@ -78,9 +77,9 @@ static int sas_get_port_device(struct asd_sas_port *port) if (!dev) return -ENOMEM; - spin_lock_irqsave(&port->phy_list_lock, flags); + spin_lock_irq(&port->phy_list_lock); if (list_empty(&port->phy_list)) { - spin_unlock_irqrestore(&port->phy_list_lock, flags); + spin_unlock_irq(&port->phy_list_lock); sas_put_device(dev); return -ENODEV; } @@ -89,7 +88,7 @@ static int sas_get_port_device(struct asd_sas_port *port) memcpy(dev->frame_rcvd, phy->frame_rcvd, min(sizeof(dev->frame_rcvd), (size_t)phy->frame_rcvd_size)); spin_unlock(&phy->frame_rcvd_lock); - spin_unlock_irqrestore(&port->phy_list_lock, flags); + spin_unlock_irq(&port->phy_list_lock); if (dev->frame_rcvd[0] == 0x34 && port->oob_mode == SATA_OOB_MODE) { struct dev_to_host_fis *fis = @@ -134,6 +133,11 @@ static int sas_get_port_device(struct asd_sas_port *port) sas_put_device(dev); return -ENODEV; } + + spin_lock_irq(&port->phy_list_lock); + list_for_each_entry(phy, &port->phy_list, port_phy_el) + sas_phy_set_target(phy, dev); + spin_unlock_irq(&port->phy_list_lock); rphy->identify.phy_identifier = phy->phy->identify.phy_identifier; memcpy(dev->sas_addr, port->attached_sas_addr, SAS_ADDR_SIZE); sas_fill_in_rphy(dev, rphy); diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index d0d9bf10f79c..f05c63879949 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -30,6 +30,7 @@ #include #include #include +#include #define sas_printk(fmt, ...) printk(KERN_NOTICE "sas: " fmt, ## __VA_ARGS__) @@ -147,6 +148,22 @@ static inline void sas_fill_in_rphy(struct domain_device *dev, } } +static inline void sas_phy_set_target(struct asd_sas_phy *p, struct domain_device *dev) +{ + struct sas_phy *phy = p->phy; + + if (dev) { + if (dev_is_sata(dev)) + phy->identify.device_type = SAS_END_DEVICE; + else + phy->identify.device_type = dev->dev_type; + phy->identify.target_port_protocols = dev->tproto; + } else { + phy->identify.device_type = SAS_PHY_UNUSED; + phy->identify.target_port_protocols = 0; + } +} + static inline void sas_add_parent_port(struct domain_device *dev, int phy_id) { struct expander_device *ex = &dev->ex_dev; diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c index 29f8fd335523..eb19c016d500 100644 --- a/drivers/scsi/libsas/sas_port.c +++ b/drivers/scsi/libsas/sas_port.c @@ -104,6 +104,7 @@ static void sas_form_port(struct asd_sas_phy *phy) /* 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); @@ -182,6 +183,7 @@ void sas_deform_port(struct asd_sas_phy *phy, int gone) spin_lock(&port->phy_list_lock); list_del_init(&phy->port_phy_el); + sas_phy_set_target(phy, NULL); phy->port = NULL; port->num_phys--; port->phy_mask &= ~(1U << phy->id); -- cgit v1.2.3-59-g8ed1b