diff options
Diffstat (limited to 'drivers/scsi/isci/port.c')
| -rw-r--r-- | drivers/scsi/isci/port.c | 263 |
1 files changed, 139 insertions, 124 deletions
diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c index 7c6ac58a5c4c..5fada73b71ff 100644 --- a/drivers/scsi/isci/port.c +++ b/drivers/scsi/isci/port.c @@ -60,18 +60,29 @@ #define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000) #define SCU_DUMMY_INDEX (0xFFFF) -static void isci_port_change_state(struct isci_port *iport, enum isci_status status) +#undef C +#define C(a) (#a) +const char *port_state_name(enum sci_port_states state) { - unsigned long flags; + static const char * const strings[] = PORT_STATES; + + return strings[state]; +} +#undef C + +static struct device *sciport_to_dev(struct isci_port *iport) +{ + int i = iport->physical_port_index; + struct isci_port *table; + struct isci_host *ihost; + + if (i == SCIC_SDS_DUMMY_PORT) + i = SCI_MAX_PORTS+1; - dev_dbg(&iport->isci_host->pdev->dev, - "%s: iport = %p, state = 0x%x\n", - __func__, iport, status); + table = iport - i; + ihost = container_of(table, typeof(*ihost), ports[0]); - /* XXX pointless lock */ - spin_lock_irqsave(&iport->state_lock, flags); - iport->status = status; - spin_unlock_irqrestore(&iport->state_lock, flags); + return &ihost->pdev->dev; } static void sci_port_get_protocols(struct isci_port *iport, struct sci_phy_proto *proto) @@ -165,18 +176,12 @@ static void isci_port_link_up(struct isci_host *isci_host, struct sci_port_properties properties; unsigned long success = true; - BUG_ON(iphy->isci_port != NULL); - - iphy->isci_port = iport; - dev_dbg(&isci_host->pdev->dev, "%s: isci_port = %p\n", __func__, iport); spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags); - isci_port_change_state(iphy->isci_port, isci_starting); - sci_port_get_properties(iport, &properties); if (iphy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) { @@ -258,7 +263,6 @@ static void isci_port_link_down(struct isci_host *isci_host, __func__, isci_device); set_bit(IDEV_GONE, &isci_device->flags); } - isci_port_change_state(isci_port, isci_stopping); } } @@ -269,52 +273,10 @@ static void isci_port_link_down(struct isci_host *isci_host, isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy, PHYE_LOSS_OF_SIGNAL); - isci_phy->isci_port = NULL; - dev_dbg(&isci_host->pdev->dev, "%s: isci_port = %p - Done\n", __func__, isci_port); } - -/** - * isci_port_ready() - This function is called by the sci core when a link - * becomes ready. - * @isci_host: This parameter specifies the isci host object. - * @port: This parameter specifies the sci port with the active link. - * - */ -static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port) -{ - dev_dbg(&isci_host->pdev->dev, - "%s: isci_port = %p\n", __func__, isci_port); - - complete_all(&isci_port->start_complete); - isci_port_change_state(isci_port, isci_ready); - return; -} - -/** - * isci_port_not_ready() - This function is called by the sci core when a link - * is not ready. All remote devices on this link will be removed if they are - * in the stopping state. - * @isci_host: This parameter specifies the isci host object. - * @port: This parameter specifies the sci port with the active link. - * - */ -static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port) -{ - dev_dbg(&isci_host->pdev->dev, - "%s: isci_port = %p\n", __func__, isci_port); -} - -static void isci_port_stop_complete(struct isci_host *ihost, - struct isci_port *iport, - enum sci_status completion_status) -{ - dev_dbg(&ihost->pdev->dev, "Port stop complete\n"); -} - - static bool is_port_ready_state(enum sci_port_states state) { switch (state) { @@ -353,7 +315,9 @@ static void port_state_machine_change(struct isci_port *iport, static void isci_port_hard_reset_complete(struct isci_port *isci_port, enum sci_status completion_status) { - dev_dbg(&isci_port->isci_host->pdev->dev, + struct isci_host *ihost = isci_port->owning_controller; + + dev_dbg(&ihost->pdev->dev, "%s: isci_port = %p, completion_status=%x\n", __func__, isci_port, completion_status); @@ -364,23 +328,24 @@ static void isci_port_hard_reset_complete(struct isci_port *isci_port, /* The reset failed. The port state is now SCI_PORT_FAILED. */ if (isci_port->active_phy_mask == 0) { + int phy_idx = isci_port->last_active_phy; + struct isci_phy *iphy = &ihost->phys[phy_idx]; /* Generate the link down now to the host, since it * was intercepted by the hard reset state machine when * it really happened. */ - isci_port_link_down(isci_port->isci_host, - &isci_port->isci_host->phys[ - isci_port->last_active_phy], - isci_port); + isci_port_link_down(ihost, iphy, isci_port); } /* Advance the port state so that link state changes will be - * noticed. - */ + * noticed. + */ port_state_machine_change(isci_port, SCI_PORT_SUB_WAITING); } - complete_all(&isci_port->hard_reset_complete); + clear_bit(IPORT_RESET_PENDING, &isci_port->state); + wake_up(&ihost->eventq); + } /* This method will return a true value if the specified phy can be assigned to @@ -835,10 +800,9 @@ static void port_timeout(unsigned long data) __func__, iport); } else if (current_state == SCI_PORT_STOPPING) { - /* if the port is still stopping then the stop has not completed */ - isci_port_stop_complete(iport->owning_controller, - iport, - SCI_FAILURE_TIMEOUT); + dev_dbg(sciport_to_dev(iport), + "%s: port%d: stop complete timeout\n", + __func__, iport->physical_port_index); } else { /* The port is in the ready state and we have a timer * reporting a timeout this should not happen. @@ -1003,7 +967,8 @@ static void sci_port_ready_substate_operational_enter(struct sci_base_state_mach struct isci_port *iport = container_of(sm, typeof(*iport), sm); struct isci_host *ihost = iport->owning_controller; - isci_port_ready(ihost, iport); + dev_dbg(&ihost->pdev->dev, "%s: port%d ready\n", + __func__, iport->physical_port_index); for (index = 0; index < SCI_MAX_PHYS; index++) { if (iport->phy_table[index]) { @@ -1069,7 +1034,8 @@ static void sci_port_ready_substate_operational_exit(struct sci_base_state_machi */ sci_port_abort_dummy_request(iport); - isci_port_not_ready(ihost, iport); + dev_dbg(&ihost->pdev->dev, "%s: port%d !ready\n", + __func__, iport->physical_port_index); if (iport->ready_exit) sci_port_invalidate_dummy_remote_node(iport); @@ -1081,7 +1047,8 @@ static void sci_port_ready_substate_configuring_enter(struct sci_base_state_mach struct isci_host *ihost = iport->owning_controller; if (iport->active_phy_mask == 0) { - isci_port_not_ready(ihost, iport); + dev_dbg(&ihost->pdev->dev, "%s: port%d !ready\n", + __func__, iport->physical_port_index); port_state_machine_change(iport, SCI_PORT_SUB_WAITING); } else @@ -1097,8 +1064,8 @@ enum sci_status sci_port_start(struct isci_port *iport) state = iport->sm.current_state_id; if (state != SCI_PORT_STOPPED) { - dev_warn(sciport_to_dev(iport), - "%s: in wrong state: %d\n", __func__, state); + dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", + __func__, port_state_name(state)); return SCI_FAILURE_INVALID_STATE; } @@ -1172,8 +1139,8 @@ enum sci_status sci_port_stop(struct isci_port *iport) SCI_PORT_STOPPING); return SCI_SUCCESS; default: - dev_warn(sciport_to_dev(iport), - "%s: in wrong state: %d\n", __func__, state); + dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", + __func__, port_state_name(state)); return SCI_FAILURE_INVALID_STATE; } } @@ -1187,8 +1154,8 @@ static enum sci_status sci_port_hard_reset(struct isci_port *iport, u32 timeout) state = iport->sm.current_state_id; if (state != SCI_PORT_SUB_OPERATIONAL) { - dev_warn(sciport_to_dev(iport), - "%s: in wrong state: %d\n", __func__, state); + dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", + __func__, port_state_name(state)); return SCI_FAILURE_INVALID_STATE; } @@ -1282,8 +1249,8 @@ enum sci_status sci_port_add_phy(struct isci_port *iport, SCI_PORT_SUB_CONFIGURING); return SCI_SUCCESS; default: - dev_warn(sciport_to_dev(iport), - "%s: in wrong state: %d\n", __func__, state); + dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", + __func__, port_state_name(state)); return SCI_FAILURE_INVALID_STATE; } } @@ -1332,8 +1299,8 @@ enum sci_status sci_port_remove_phy(struct isci_port *iport, SCI_PORT_SUB_CONFIGURING); return SCI_SUCCESS; default: - dev_warn(sciport_to_dev(iport), - "%s: in wrong state: %d\n", __func__, state); + dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", + __func__, port_state_name(state)); return SCI_FAILURE_INVALID_STATE; } } @@ -1375,8 +1342,8 @@ enum sci_status sci_port_link_up(struct isci_port *iport, sci_port_general_link_up_handler(iport, iphy, PF_RESUME); return SCI_SUCCESS; default: - dev_warn(sciport_to_dev(iport), - "%s: in wrong state: %d\n", __func__, state); + dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", + __func__, port_state_name(state)); return SCI_FAILURE_INVALID_STATE; } } @@ -1405,8 +1372,8 @@ enum sci_status sci_port_link_down(struct isci_port *iport, sci_port_deactivate_phy(iport, iphy, false); return SCI_SUCCESS; default: - dev_warn(sciport_to_dev(iport), - "%s: in wrong state: %d\n", __func__, state); + dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", + __func__, port_state_name(state)); return SCI_FAILURE_INVALID_STATE; } } @@ -1425,8 +1392,8 @@ enum sci_status sci_port_start_io(struct isci_port *iport, iport->started_request_count++; return SCI_SUCCESS; default: - dev_warn(sciport_to_dev(iport), - "%s: in wrong state: %d\n", __func__, state); + dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", + __func__, port_state_name(state)); return SCI_FAILURE_INVALID_STATE; } } @@ -1440,8 +1407,8 @@ enum sci_status sci_port_complete_io(struct isci_port *iport, state = iport->sm.current_state_id; switch (state) { case SCI_PORT_STOPPED: - dev_warn(sciport_to_dev(iport), - "%s: in wrong state: %d\n", __func__, state); + dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", + __func__, port_state_name(state)); return SCI_FAILURE_INVALID_STATE; case SCI_PORT_STOPPING: sci_port_decrement_request_count(iport); @@ -1547,7 +1514,8 @@ static void sci_port_ready_state_enter(struct sci_base_state_machine *sm) if (prev_state == SCI_PORT_RESETTING) isci_port_hard_reset_complete(iport, SCI_SUCCESS); else - isci_port_not_ready(ihost, iport); + dev_dbg(&ihost->pdev->dev, "%s: port%d !ready\n", + __func__, iport->physical_port_index); /* Post and suspend the dummy remote node context for this port. */ sci_port_post_dummy_remote_node(iport); @@ -1644,22 +1612,7 @@ void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index) { INIT_LIST_HEAD(&iport->remote_dev_list); INIT_LIST_HEAD(&iport->domain_dev_list); - spin_lock_init(&iport->state_lock); - init_completion(&iport->start_complete); iport->isci_host = ihost; - isci_port_change_state(iport, isci_freed); -} - -/** - * isci_port_get_state() - This function gets the status of the port object. - * @isci_port: This parameter points to the isci_port object - * - * status of the object as a isci_status enum. - */ -enum isci_status isci_port_get_state( - struct isci_port *isci_port) -{ - return isci_port->status; } void sci_port_broadcast_change_received(struct isci_port *iport, struct isci_phy *iphy) @@ -1670,6 +1623,11 @@ void sci_port_broadcast_change_received(struct isci_port *iport, struct isci_phy isci_port_bc_change_received(ihost, iport, iphy); } +static void wait_port_reset(struct isci_host *ihost, struct isci_port *iport) +{ + wait_event(ihost->eventq, !test_bit(IPORT_RESET_PENDING, &iport->state)); +} + int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport, struct isci_phy *iphy) { @@ -1680,9 +1638,8 @@ int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *ipor dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n", __func__, iport); - init_completion(&iport->hard_reset_complete); - spin_lock_irqsave(&ihost->scic_lock, flags); + set_bit(IPORT_RESET_PENDING, &iport->state); #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT status = sci_port_hard_reset(iport, ISCI_PORT_RESET_TIMEOUT); @@ -1690,7 +1647,7 @@ int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *ipor spin_unlock_irqrestore(&ihost->scic_lock, flags); if (status == SCI_SUCCESS) { - wait_for_completion(&iport->hard_reset_complete); + wait_port_reset(ihost, iport); dev_dbg(&ihost->pdev->dev, "%s: iport = %p; hard reset completion\n", @@ -1704,6 +1661,8 @@ int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *ipor __func__, iport, iport->hard_reset_status); } } else { + clear_bit(IPORT_RESET_PENDING, &iport->state); + wake_up(&ihost->eventq); ret = TMF_RESP_FUNC_FAILED; dev_err(&ihost->pdev->dev, @@ -1726,24 +1685,80 @@ int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *ipor return ret; } -/** - * isci_port_deformed() - This function is called by libsas when a port becomes - * inactive. - * @phy: This parameter specifies the libsas phy with the inactive port. - * - */ +int isci_ata_check_ready(struct domain_device *dev) +{ + struct isci_port *iport = dev->port->lldd_port; + struct isci_host *ihost = dev_to_ihost(dev); + struct isci_remote_device *idev; + unsigned long flags; + int rc = 0; + + spin_lock_irqsave(&ihost->scic_lock, flags); + idev = isci_lookup_device(dev); + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + if (!idev) + goto out; + + if (test_bit(IPORT_RESET_PENDING, &iport->state)) + goto out; + + rc = !!iport->active_phy_mask; + out: + isci_put_device(idev); + + return rc; +} + void isci_port_deformed(struct asd_sas_phy *phy) { - pr_debug("%s: sas_phy = %p\n", __func__, phy); + struct isci_host *ihost = phy->ha->lldd_ha; + struct isci_port *iport = phy->port->lldd_port; + unsigned long flags; + int i; + + /* we got a port notification on a port that was subsequently + * torn down and libsas is just now catching up + */ + if (!iport) + return; + + spin_lock_irqsave(&ihost->scic_lock, flags); + for (i = 0; i < SCI_MAX_PHYS; i++) { + if (iport->active_phy_mask & 1 << i) + break; + } + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + if (i >= SCI_MAX_PHYS) + dev_dbg(&ihost->pdev->dev, "%s: port: %ld\n", + __func__, (long) (iport - &ihost->ports[0])); } -/** - * isci_port_formed() - This function is called by libsas when a port becomes - * active. - * @phy: This parameter specifies the libsas phy with the active port. - * - */ void isci_port_formed(struct asd_sas_phy *phy) { - pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port); + struct isci_host *ihost = phy->ha->lldd_ha; + struct isci_phy *iphy = to_iphy(phy); + struct asd_sas_port *port = phy->port; + struct isci_port *iport; + unsigned long flags; + int i; + + /* initial ports are formed as the driver is still initializing, + * wait for that process to complete + */ + wait_for_start(ihost); + + spin_lock_irqsave(&ihost->scic_lock, flags); + for (i = 0; i < SCI_MAX_PORTS; i++) { + iport = &ihost->ports[i]; + if (iport->active_phy_mask & 1 << iphy->phy_index) + break; + } + spin_unlock_irqrestore(&ihost->scic_lock, flags); + + if (i >= SCI_MAX_PORTS) + iport = NULL; + + port->lldd_port = iport; } |