diff options
Diffstat (limited to 'drivers/scsi/isci/port.c')
| -rw-r--r-- | drivers/scsi/isci/port.c | 2451 |
1 files changed, 2391 insertions, 60 deletions
diff --git a/drivers/scsi/isci/port.c b/drivers/scsi/isci/port.c index 321935d9560b..dbff28396dd8 100644 --- a/drivers/scsi/isci/port.c +++ b/drivers/scsi/isci/port.c @@ -53,11 +53,13 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#include <linux/workqueue.h> #include "isci.h" -#include "scic_port.h" #include "port.h" #include "request.h" +#include "timers.h" + +#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) { @@ -73,44 +75,87 @@ static void isci_port_change_state(struct isci_port *iport, enum isci_status sta spin_unlock_irqrestore(&iport->state_lock, flags); } -void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index) +/* + * This function will indicate which protocols are supported by this port. + * @sci_port: a handle corresponding to the SAS port for which to return the + * supported protocols. + * @protocols: This parameter specifies a pointer to a data structure + * which the core will copy the protocol values for the port from the + * transmit_identification register. + */ +static void +scic_sds_port_get_protocols(struct scic_sds_port *sci_port, + struct scic_phy_proto *protocols) { - 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); + u8 index; + + protocols->all = 0; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index] != NULL) { + scic_sds_phy_get_protocols(sci_port->phy_table[index], + protocols); + } + } } /** - * isci_port_get_state() - This function gets the status of the port object. - * @isci_port: This parameter points to the isci_port object + * This method requests a list (mask) of the phys contained in the supplied SAS + * port. + * @sci_port: a handle corresponding to the SAS port for which to return the + * phy mask. * - * status of the object as a isci_status enum. + * Return a bit mask indicating which phys are a part of this port. Each bit + * corresponds to a phy identifier (e.g. bit 0 = phy id 0). */ -enum isci_status isci_port_get_state( - struct isci_port *isci_port) +static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port) { - return isci_port->status; + u32 index; + u32 mask; + + mask = 0; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index] != NULL) { + mask |= (1 << index); + } + } + + return mask; } -void isci_port_bc_change_received(struct isci_host *ihost, - struct scic_sds_port *sci_port, - struct scic_sds_phy *sci_phy) +/** + * scic_port_get_properties() - This method simply returns the properties + * regarding the port, such as: physical index, protocols, sas address, etc. + * @port: this parameter specifies the port for which to retrieve the physical + * index. + * @properties: This parameter specifies the properties structure into which to + * copy the requested information. + * + * Indicate if the user specified a valid port. SCI_SUCCESS This value is + * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This + * value is returned if the specified port is not valid. When this value is + * returned, no data is copied to the properties output parameter. + */ +static enum sci_status scic_port_get_properties(struct scic_sds_port *port, + struct scic_port_properties *prop) { - struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); + if ((port == NULL) || + (port->logical_port_index == SCIC_SDS_DUMMY_PORT)) + return SCI_FAILURE_INVALID_PORT; - dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n", - __func__, iphy, &iphy->sas_phy); + prop->index = port->logical_port_index; + prop->phy_mask = scic_sds_port_get_phys(port); + scic_sds_port_get_sas_address(port, &prop->local.sas_address); + scic_sds_port_get_protocols(port, &prop->local.protocols); + scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address); - ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); - scic_port_enable_broadcast_change_notification(sci_port); + return SCI_SUCCESS; } -void isci_port_link_up(struct isci_host *isci_host, - struct scic_sds_port *port, - struct scic_sds_phy *phy) +static void isci_port_link_up(struct isci_host *isci_host, + struct scic_sds_port *port, + struct scic_sds_phy *phy) { unsigned long flags; struct scic_port_properties properties; @@ -184,8 +229,9 @@ void isci_port_link_up(struct isci_host *isci_host, * @port: This parameter specifies the isci port with the active link. * */ -void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy, - struct isci_port *isci_port) +static void isci_port_link_down(struct isci_host *isci_host, + struct isci_phy *isci_phy, + struct isci_port *isci_port) { struct isci_remote_device *isci_device; @@ -231,37 +277,13 @@ void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy, /** - * 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. - * - */ -void isci_port_deformed( - struct asd_sas_phy *phy) -{ - pr_debug("%s: sas_phy = %p\n", __func__, phy); -} - -/** - * 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); -} - -/** * 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. * */ -void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port) +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); @@ -279,12 +301,19 @@ void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port) * @port: This parameter specifies the sci port with the active link. * */ -void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port) +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 scic_sds_controller *scic, + struct scic_sds_port *sci_port, + enum sci_status completion_status) +{ + dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n"); +} + /** * isci_port_hard_reset_complete() - This function is called by the sci core * when the hard reset complete notification has been received. @@ -293,8 +322,8 @@ void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_por * process. * */ -void isci_port_hard_reset_complete(struct isci_port *isci_port, - enum sci_status completion_status) +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, "%s: isci_port = %p, completion_status=%x\n", @@ -306,6 +335,2293 @@ void isci_port_hard_reset_complete(struct isci_port *isci_port, complete_all(&isci_port->hard_reset_complete); } +/* This method will return a true value if the specified phy can be assigned to + * this port The following is a list of phys for each port that are allowed: - + * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method + * doesn't preclude all configurations. It merely ensures that a phy is part + * of the allowable set of phy identifiers for that port. For example, one + * could assign phy 3 to port 0 and no other phys. Please refer to + * scic_sds_port_is_phy_mask_valid() for information regarding whether the + * phy_mask for a port can be supported. bool true if this is a valid phy + * assignment for the port false if this is not a valid phy assignment for the + * port + */ +bool scic_sds_port_is_valid_phy_assignment(struct scic_sds_port *sci_port, + u32 phy_index) +{ + /* Initialize to invalid value. */ + u32 existing_phy_index = SCI_MAX_PHYS; + u32 index; + + if ((sci_port->physical_port_index == 1) && (phy_index != 1)) { + return false; + } + + if (sci_port->physical_port_index == 3 && phy_index != 3) { + return false; + } + + if ( + (sci_port->physical_port_index == 2) + && ((phy_index == 0) || (phy_index == 1)) + ) { + return false; + } + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if ((sci_port->phy_table[index] != NULL) + && (index != phy_index)) { + existing_phy_index = index; + } + } + + /* + * Ensure that all of the phys in the port are capable of + * operating at the same maximum link rate. */ + if ( + (existing_phy_index < SCI_MAX_PHYS) + && (sci_port->owning_controller->user_parameters.sds1.phys[ + phy_index].max_speed_generation != + sci_port->owning_controller->user_parameters.sds1.phys[ + existing_phy_index].max_speed_generation) + ) + return false; + + return true; +} + +/** + * + * @sci_port: This is the port object for which to determine if the phy mask + * can be supported. + * + * This method will return a true value if the port's phy mask can be supported + * by the SCU. The following is a list of valid PHY mask configurations for + * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2] + * - Port 3 - [3] This method returns a boolean indication specifying if the + * phy mask can be supported. true if this is a valid phy assignment for the + * port false if this is not a valid phy assignment for the port + */ +static bool scic_sds_port_is_phy_mask_valid( + struct scic_sds_port *sci_port, + u32 phy_mask) +{ + if (sci_port->physical_port_index == 0) { + if (((phy_mask & 0x0F) == 0x0F) + || ((phy_mask & 0x03) == 0x03) + || ((phy_mask & 0x01) == 0x01) + || (phy_mask == 0)) + return true; + } else if (sci_port->physical_port_index == 1) { + if (((phy_mask & 0x02) == 0x02) + || (phy_mask == 0)) + return true; + } else if (sci_port->physical_port_index == 2) { + if (((phy_mask & 0x0C) == 0x0C) + || ((phy_mask & 0x04) == 0x04) + || (phy_mask == 0)) + return true; + } else if (sci_port->physical_port_index == 3) { + if (((phy_mask & 0x08) == 0x08) + || (phy_mask == 0)) + return true; + } + + return false; +} + +/** + * + * @sci_port: This parameter specifies the port from which to return a + * connected phy. + * + * This method retrieves a currently active (i.e. connected) phy contained in + * the port. Currently, the lowest order phy that is connected is returned. + * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is + * returned if there are no currently active (i.e. connected to a remote end + * point) phys contained in the port. All other values specify a struct scic_sds_phy + * object that is active in the port. + */ +static struct scic_sds_phy *scic_sds_port_get_a_connected_phy( + struct scic_sds_port *sci_port + ) { + u32 index; + struct scic_sds_phy *phy; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + /* + * Ensure that the phy is both part of the port and currently + * connected to the remote end-point. */ + phy = sci_port->phy_table[index]; + if ( + (phy != NULL) + && scic_sds_port_active_phy(sci_port, phy) + ) { + return phy; + } + } + + return NULL; +} + +/** + * scic_sds_port_set_phy() - + * @out]: port The port object to which the phy assignement is being made. + * @out]: phy The phy which is being assigned to the port. + * + * This method attempts to make the assignment of the phy to the port. If + * successful the phy is assigned to the ports phy table. bool true if the phy + * assignment can be made. false if the phy assignement can not be made. This + * is a functional test that only fails if the phy is currently assigned to a + * different port. + */ +static enum sci_status scic_sds_port_set_phy( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + /* + * Check to see if we can add this phy to a port + * that means that the phy is not part of a port and that the port does + * not already have a phy assinged to the phy index. */ + if ( + (port->phy_table[phy->phy_index] == NULL) + && (scic_sds_phy_get_port(phy) == NULL) + && scic_sds_port_is_valid_phy_assignment(port, phy->phy_index) + ) { + /* + * Phy is being added in the stopped state so we are in MPC mode + * make logical port index = physical port index */ + port->logical_port_index = port->physical_port_index; + port->phy_table[phy->phy_index] = phy; + scic_sds_phy_set_port(phy, port); + + return SCI_SUCCESS; + } + + return SCI_FAILURE; +} + +/** + * scic_sds_port_clear_phy() - + * @out]: port The port from which the phy is being cleared. + * @out]: phy The phy being cleared from the port. + * + * This method will clear the phy assigned to this port. This method fails if + * this phy is not currently assinged to this port. bool true if the phy is + * removed from the port. false if this phy is not assined to this port. + */ +static enum sci_status scic_sds_port_clear_phy( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + /* Make sure that this phy is part of this port */ + if (port->phy_table[phy->phy_index] == phy && + scic_sds_phy_get_port(phy) == port) { + struct scic_sds_controller *scic = port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + + /* Yep it is assigned to this port so remove it */ + scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci); + port->phy_table[phy->phy_index] = NULL; + return SCI_SUCCESS; + } + + return SCI_FAILURE; +} + +/** + * scic_sds_port_add_phy() - + * @sci_port: This parameter specifies the port in which the phy will be added. + * @sci_phy: This parameter is the phy which is to be added to the port. + * + * This method will add a PHY to the selected port. This method returns an + * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other status + * is failre to add the phy to the port. + */ +enum sci_status scic_sds_port_add_phy( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + return sci_port->state_handlers->add_phy_handler( + sci_port, sci_phy); +} + + +/** + * scic_sds_port_remove_phy() - + * @sci_port: This parameter specifies the port in which the phy will be added. + * @sci_phy: This parameter is the phy which is to be added to the port. + * + * This method will remove the PHY from the selected PORT. This method returns + * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any other + * status is failre to add the phy to the port. + */ +enum sci_status scic_sds_port_remove_phy( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + return sci_port->state_handlers->remove_phy_handler( + sci_port, sci_phy); +} + +/** + * This method requests the SAS address for the supplied SAS port from the SCI + * implementation. + * @sci_port: a handle corresponding to the SAS port for which to return the + * SAS address. + * @sas_address: This parameter specifies a pointer to a SAS address structure + * into which the core will copy the SAS address for the port. + * + */ +void scic_sds_port_get_sas_address( + struct scic_sds_port *sci_port, + struct sci_sas_address *sas_address) +{ + u32 index; + + sas_address->high = 0; + sas_address->low = 0; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index] != NULL) { + scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address); + } + } +} + +/* + * This function requests the SAS address for the device directly attached to + * this SAS port. + * @sci_port: a handle corresponding to the SAS port for which to return the + * SAS address. + * @sas_address: This parameter specifies a pointer to a SAS address structure + * into which the core will copy the SAS address for the device directly + * attached to the port. + * + */ +void scic_sds_port_get_attached_sas_address( + struct scic_sds_port *sci_port, + struct sci_sas_address *sas_address) +{ + struct scic_sds_phy *sci_phy; + + /* + * Ensure that the phy is both part of the port and currently + * connected to the remote end-point. + */ + sci_phy = scic_sds_port_get_a_connected_phy(sci_port); + if (sci_phy) { + if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) { + scic_sds_phy_get_attached_sas_address(sci_phy, + sas_address); + } else { + scic_sds_phy_get_sas_address(sci_phy, sas_address); + sas_address->low += sci_phy->phy_index; + } + } else { + sas_address->high = 0; + sas_address->low = 0; + } +} + +/** + * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround + * + * @sci_port: logical port on which we need to create the remote node context + * @rni: remote node index for this remote node context. + * + * This routine will construct a dummy remote node context data structure + * This structure will be posted to the hardware to work around a scheduler + * error in the hardware. + */ +static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni) +{ + union scu_remote_node_context *rnc; + + rnc = &sci_port->owning_controller->remote_node_context_table[rni]; + + memset(rnc, 0, sizeof(union scu_remote_node_context)); + + rnc->ssp.remote_sas_address_hi = 0; + rnc->ssp.remote_sas_address_lo = 0; + + rnc->ssp.remote_node_index = rni; + rnc->ssp.remote_node_port_width = 1; + rnc->ssp.logical_port_index = sci_port->physical_port_index; + + rnc->ssp.nexus_loss_timer_enable = false; + rnc->ssp.check_bit = false; + rnc->ssp.is_valid = true; + rnc->ssp.is_remote_node_context = true; + rnc->ssp.function_number = 0; + rnc->ssp.arbitration_wait_time = 0; +} + +/** + * scic_sds_port_construct_dummy_task() - create dummy task for si workaround + * @sci_port The logical port on which we need to create the + * remote node context. + * context. + * @tci The remote node index for this remote node context. + * + * This routine will construct a dummy task context data structure. This + * structure will be posted to the hardwre to work around a scheduler error + * in the hardware. + * + */ +static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci) +{ + struct scu_task_context *task_context; + + task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci); + + memset(task_context, 0, sizeof(struct scu_task_context)); + + task_context->abort = 0; + task_context->priority = 0; + task_context->initiator_request = 1; + task_context->connection_rate = 1; + task_context->protocol_engine_index = 0; + task_context->logical_port_index = sci_port->physical_port_index; + task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; + task_context->task_index = scic_sds_io_tag_get_index(tci); + task_context->valid = SCU_TASK_CONTEXT_VALID; + task_context->context_type = SCU_TASK_CONTEXT_TYPE; + + task_context->remote_node_index = sci_port->reserved_rni; + task_context->command_code = 0; + + task_context->link_layer_control = 0; + task_context->do_not_dma_ssp_good_response = 1; + task_context->strict_ordering = 0; + task_context->control_frame = 0; + task_context->timeout_enable = 0; + task_context->block_guard_enable = 0; + + task_context->address_modifier = 0; + + task_context->task_phase = 0x01; +} + +static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + + if (sci_port->reserved_tci != SCU_DUMMY_INDEX) + scic_controller_free_io_tag(scic, sci_port->reserved_tci); + + if (sci_port->reserved_rni != SCU_DUMMY_INDEX) + scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes, + 1, sci_port->reserved_rni); + + sci_port->reserved_rni = SCU_DUMMY_INDEX; + sci_port->reserved_tci = SCU_DUMMY_INDEX; +} + +/** + * This method performs initialization of the supplied port. Initialization + * includes: - state machine initialization - member variable initialization + * - configuring the phy_mask + * @sci_port: + * @transport_layer_registers: + * @port_task_scheduler_registers: + * @port_configuration_regsiter: + * + * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned + * if the phy being added to the port + */ +enum sci_status scic_sds_port_initialize( + struct scic_sds_port *sci_port, + void __iomem *port_task_scheduler_registers, + void __iomem *port_configuration_regsiter, + void __iomem *viit_registers) +{ + sci_port->port_task_scheduler_registers = port_task_scheduler_registers; + sci_port->port_pe_configuration_register = port_configuration_regsiter; + sci_port->viit_registers = viit_registers; + + return SCI_SUCCESS; +} + +/** + * scic_port_hard_reset() - perform port hard reset + * @port: a handle corresponding to the SAS port to be hard reset. + * @reset_timeout: This parameter specifies the number of milliseconds in which + * the port reset operation should complete. + * + * The SCI User callback in scic_user_callbacks_t will only be called once for + * each phy in the SAS Port at completion of the hard reset sequence. Return a + * status indicating whether the hard reset started successfully. SCI_SUCCESS + * This value is returned if the hard reset operation started successfully. + */ +static enum sci_status scic_port_hard_reset(struct scic_sds_port *port, + u32 reset_timeout) +{ + return port->state_handlers->reset_handler( + port, reset_timeout); +} + +/** + * This method assigns the direct attached device ID for this port. + * + * @param[in] sci_port The port for which the direct attached device id is to + * be assigned. + * @param[in] device_id The direct attached device ID to assign to the port. + * This will be the RNi for the device + */ +void scic_sds_port_setup_transports( + struct scic_sds_port *sci_port, + u32 device_id) +{ + u8 index; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->active_phy_mask & (1 << index)) + scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id); + } +} + +/** + * + * @sci_port: This is the port on which the phy should be enabled. + * @sci_phy: This is the specific phy which to enable. + * @do_notify_user: This parameter specifies whether to inform the user (via + * scic_cb_port_link_up()) as to the fact that a new phy as become ready. + * + * This function will activate the phy in the port. + * Activation includes: - adding + * the phy to the port - enabling the Protocol Engine in the silicon. - + * notifying the user that the link is up. none + */ +static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy, + bool do_notify_user) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + + if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) + scic_sds_phy_resume(sci_phy); + + sci_port->active_phy_mask |= 1 << sci_phy->phy_index; + + scic_sds_controller_clear_invalid_phy(scic, sci_phy); + + if (do_notify_user == true) + isci_port_link_up(ihost, sci_port, sci_phy); +} + +void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy, + bool do_notify_user) +{ + struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port); + struct isci_port *iport = sci_port_to_iport(sci_port); + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); + + sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index); + + sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; + + /* Re-assign the phy back to the LP as if it were a narrow port */ + writel(sci_phy->phy_index, + &sci_port->port_pe_configuration_register[sci_phy->phy_index]); + + if (do_notify_user == true) + isci_port_link_down(ihost, iphy, iport); +} + +/** + * + * @sci_port: This is the port on which the phy should be disabled. + * @sci_phy: This is the specific phy which to disabled. + * + * This function will disable the phy and report that the phy is not valid for + * this port object. None + */ +static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + + /* + * Check to see if we have alreay reported this link as bad and if + * not go ahead and tell the SCI_USER that we have discovered an + * invalid link. + */ + if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) { + scic_sds_controller_set_invalid_phy(scic, sci_phy); + dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n"); + } +} + +/** + * scic_sds_port_general_link_up_handler - phy can be assigned to port? + * @sci_port: scic_sds_port object for which has a phy that has gone link up. + * @sci_phy: This is the struct scic_sds_phy object that has gone link up. + * @do_notify_user: This parameter specifies whether to inform the user (via + * scic_cb_port_link_up()) as to the fact that a new phy as become ready. + * + * Determine if this phy can be assigned to this + * port . If the phy is not a valid PHY for + * this port then the function will notify the user. A PHY can only be + * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in + * the same port. none + */ +static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy, + bool do_notify_user) +{ + struct sci_sas_address port_sas_address; + struct sci_sas_address phy_sas_address; + + scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address); + scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address); + + /* If the SAS address of the new phy matches the SAS address of + * other phys in the port OR this is the first phy in the port, + * then activate the phy and allow it to be used for operations + * in this port. + */ + if ((phy_sas_address.high == port_sas_address.high && + phy_sas_address.low == port_sas_address.low) || + sci_port->active_phy_mask == 0) { + struct sci_base_state_machine *sm = &sci_port->state_machine; + + scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user); + if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING) + sci_base_state_machine_change_state(sm, SCI_BASE_PORT_STATE_READY); + } else + scic_sds_port_invalid_link_up(sci_port, sci_phy); +} + + + +/** + * This method returns false if the port only has a single phy object assigned. + * If there are no phys or more than one phy then the method will return + * true. + * @sci_port: The port for which the wide port condition is to be checked. + * + * bool true Is returned if this is a wide ported port. false Is returned if + * this is a narrow port. + */ +static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port) +{ + u32 index; + u32 phy_count = 0; + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index] != NULL) { + phy_count++; + } + } + + return phy_count != 1; +} + +/** + * This method is called by the PHY object when the link is detected. if the + * port wants the PHY to continue on to the link up state then the port + * layer must return true. If the port object returns false the phy object + * must halt its attempt to go link up. + * @sci_port: The port associated with the phy object. + * @sci_phy: The phy object that is trying to go link up. + * + * true if the phy object can continue to the link up condition. true Is + * returned if this phy can continue to the ready state. false Is returned if + * can not continue on to the ready state. This notification is in place for + * wide ports and direct attached phys. Since there are no wide ported SATA + * devices this could become an invalid port configuration. + */ +bool scic_sds_port_link_detected( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) && + (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) && + scic_sds_port_is_wide(sci_port)) { + scic_sds_port_invalid_link_up(sci_port, sci_phy); + + return false; + } + + return true; +} + +/** + * This method is the entry point for the phy to inform the port that it is now + * in a ready state + * @sci_port: + * + * + */ +void scic_sds_port_link_up( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + sci_phy->is_in_link_training = false; + + sci_port->state_handlers->link_up_handler(sci_port, sci_phy); +} + +/** + * This method is the entry point for the phy to inform the port that it is no + * longer in a ready state + * @sci_port: + * + * + */ +void scic_sds_port_link_down( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + sci_port->state_handlers->link_down_handler(sci_port, sci_phy); +} + +/** + * This method is called to start an IO request on this port. + * @sci_port: + * @sci_dev: + * @sci_req: + * + * enum sci_status + */ +enum sci_status scic_sds_port_start_io( + struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + return sci_port->state_handlers->start_io_handler( + sci_port, sci_dev, sci_req); +} + +/** + * This method is called to complete an IO request to the port. + * @sci_port: + * @sci_dev: + * @sci_req: + * + * enum sci_status + */ +enum sci_status scic_sds_port_complete_io( + struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + return sci_port->state_handlers->complete_io_handler( + sci_port, sci_dev, sci_req); +} + +/** + * This method is provided to timeout requests for port operations. Mostly its + * for the port reset operation. + * + * + */ +static void scic_sds_port_timeout_handler(void *port) +{ + struct scic_sds_port *sci_port = port; + u32 current_state; + + current_state = sci_base_state_machine_get_state( + &sci_port->state_machine); + + if (current_state == SCI_BASE_PORT_STATE_RESETTING) { + /* + * if the port is still in the resetting state then the + * timeout fired before the reset completed. + */ + sci_base_state_machine_change_state( + &sci_port->state_machine, + SCI_BASE_PORT_STATE_FAILED); + } else if (current_state == SCI_BASE_PORT_STATE_STOPPED) { + /* + * if the port is stopped then the start request failed + * In this case stay in the stopped state. + */ + dev_err(sciport_to_dev(sci_port), + "%s: SCIC Port 0x%p failed to stop before tiemout.\n", + __func__, + sci_port); + } else if (current_state == SCI_BASE_PORT_STATE_STOPPING) { + /* + * if the port is still stopping then the stop has not + * completed + */ + isci_port_stop_complete( + scic_sds_port_get_controller(sci_port), + sci_port, + SCI_FAILURE_TIMEOUT); + } else { + /* + * The port is in the ready state and we have a timer + * reporting a timeout this should not happen. + */ + dev_err(sciport_to_dev(sci_port), + "%s: SCIC Port 0x%p is processing a timeout operation " + "in state %d.\n", + __func__, + sci_port, + current_state); + } +} + +/* --------------------------------------------------------------------------- */ + +/** + * This function updates the hardwares VIIT entry for this port. + * + * + */ +static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port) +{ + struct sci_sas_address sas_address; + + scic_sds_port_get_sas_address(sci_port, &sas_address); + + writel(sas_address.high, + &sci_port->viit_registers->initiator_sas_address_hi); + writel(sas_address.low, + &sci_port->viit_registers->initiator_sas_address_lo); + + /* This value get cleared just in case its not already cleared */ + writel(0, &sci_port->viit_registers->reserved); + + /* We are required to update the status register last */ + writel(SCU_VIIT_ENTRY_ID_VIIT | + SCU_VIIT_IPPT_INITIATOR | + ((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) | + SCU_VIIT_STATUS_ALL_VALID, + &sci_port->viit_registers->status); +} + +/** + * This method returns the maximum allowed speed for data transfers on this + * port. This maximum allowed speed evaluates to the maximum speed of the + * slowest phy in the port. + * @sci_port: This parameter specifies the port for which to retrieve the + * maximum allowed speed. + * + * This method returns the maximum negotiated speed of the slowest phy in the + * port. + */ +enum sas_linkrate scic_sds_port_get_max_allowed_speed( + struct scic_sds_port *sci_port) +{ + u16 index; + enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS; + struct scic_sds_phy *phy = NULL; + + /* + * Loop through all of the phys in this port and find the phy with the + * lowest maximum link rate. */ + for (index = 0; index < SCI_MAX_PHYS; index++) { + phy = sci_port->phy_table[index]; + if ( + (phy != NULL) + && (scic_sds_port_active_phy(sci_port, phy) == true) + && (phy->max_negotiated_speed < max_allowed_speed) + ) + max_allowed_speed = phy->max_negotiated_speed; + } + + return max_allowed_speed; +} + +static void scic_port_enable_broadcast_change_notification(struct scic_sds_port *port) +{ + struct scic_sds_phy *phy; + u32 register_value; + u8 index; + + /* Loop through all of the phys to enable BCN. */ + for (index = 0; index < SCI_MAX_PHYS; index++) { + phy = port->phy_table[index]; + if (phy != NULL) { + register_value = + readl(&phy->link_layer_registers->link_layer_control); + + /* clear the bit by writing 1. */ + writel(register_value, + &phy->link_layer_registers->link_layer_control); + } + } +} + +/* + * **************************************************************************** + * * READY SUBSTATE HANDLERS + * **************************************************************************** */ + +/* + * This method is the general ready state stop handler for the struct scic_sds_port + * object. This function will transition the ready substate machine to its + * final state. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_ready_substate_stop_handler( + struct scic_sds_port *port) +{ + sci_base_state_machine_change_state( + &port->state_machine, + SCI_BASE_PORT_STATE_STOPPING + ); + + return SCI_SUCCESS; +} + +/* + * This method is the general ready substate complete io handler for the + * struct scic_sds_port object. This function decrments the outstanding request count + * for this port object. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_ready_substate_complete_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + scic_sds_port_decrement_request_count(port); + + return SCI_SUCCESS; +} + +static enum sci_status scic_sds_port_ready_substate_add_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + enum sci_status status; + + status = scic_sds_port_set_phy(port, phy); + + if (status == SCI_SUCCESS) { + scic_sds_port_general_link_up_handler(port, phy, true); + + port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; + + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING + ); + } + + return status; +} + + +static enum sci_status scic_sds_port_ready_substate_remove_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + enum sci_status status; + + status = scic_sds_port_clear_phy(port, phy); + + if (status == SCI_SUCCESS) { + scic_sds_port_deactivate_phy(port, phy, true); + + port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; + + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING + ); + } + + return status; +} + +/* + * **************************************************************************** + * * READY SUBSTATE WAITING HANDLERS + * **************************************************************************** */ + +/** + * + * @sci_port: This is the struct scic_sds_port object that which has a phy that has + * gone link up. + * @sci_phy: This is the struct scic_sds_phy object that has gone link up. + * + * This method is the ready waiting substate link up handler for the + * struct scic_sds_port object. This methos will report the link up condition for + * this port and will transition to the ready operational substate. none + */ +static void scic_sds_port_ready_waiting_substate_link_up_handler( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + /* + * Since this is the first phy going link up for the port we can just enable + * it and continue. */ + scic_sds_port_activate_phy(sci_port, sci_phy, true); + + sci_base_state_machine_change_state( + &sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL + ); +} + +/* + * This method is the ready waiting substate start io handler for the + * struct scic_sds_port object. The port object can not accept new requests so the + * request is failed. enum sci_status SCI_FAILURE_INVALID_STATE + */ +static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + return SCI_FAILURE_INVALID_STATE; +} + +/* + * **************************************************************************** + * * READY SUBSTATE OPERATIONAL HANDLERS + * **************************************************************************** */ + +/* + * This method will casue the port to reset. enum sci_status SCI_SUCCESS + */ +static enum +sci_status scic_sds_port_ready_operational_substate_reset_handler( + struct scic_sds_port *port, + u32 timeout) +{ + enum sci_status status = SCI_FAILURE_INVALID_PHY; + u32 phy_index; + struct scic_sds_phy *selected_phy = NULL; + + + /* Select a phy on which we can send the hard reset request. */ + for (phy_index = 0; + (phy_index < SCI_MAX_PHYS) && (selected_phy == NULL); + phy_index++) { + selected_phy = port->phy_table[phy_index]; + + if ((selected_phy != NULL) && + !scic_sds_port_active_phy(port, selected_phy)) { + /* + * We found a phy but it is not ready select + * different phy + */ + selected_phy = NULL; + } + } + + /* If we have a phy then go ahead and start the reset procedure */ + if (selected_phy != NULL) { + status = scic_sds_phy_reset(selected_phy); + + if (status == SCI_SUCCESS) { + isci_timer_start(port->timer_handle, timeout); + port->not_ready_reason = + SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED; + + sci_base_state_machine_change_state( + &port->state_machine, + SCI_BASE_PORT_STATE_RESETTING); + } + } + + return status; +} + +/** + * scic_sds_port_ready_operational_substate_link_up_handler() - + * @sci_port: This is the struct scic_sds_port object that which has a phy that has + * gone link up. + * @sci_phy: This is the struct scic_sds_phy object that has gone link up. + * + * This method is the ready operational substate link up handler for the + * struct scic_sds_port object. This function notifies the SCI User that the phy has + * gone link up. none + */ +static void scic_sds_port_ready_operational_substate_link_up_handler( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); +} + +/** + * scic_sds_port_ready_operational_substate_link_down_handler() - + * @sci_port: This is the struct scic_sds_port object that which has a phy that has + * gone link down. + * @sci_phy: This is the struct scic_sds_phy object that has gone link down. + * + * This method is the ready operational substate link down handler for the + * struct scic_sds_port object. This function notifies the SCI User that the phy has + * gone link down and if this is the last phy in the port the port will change + * state to the ready waiting substate. none + */ +static void scic_sds_port_ready_operational_substate_link_down_handler( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + scic_sds_port_deactivate_phy(sci_port, sci_phy, true); + + /* + * If there are no active phys left in the port, then transition + * the port to the WAITING state until such time as a phy goes + * link up. */ + if (sci_port->active_phy_mask == 0) + sci_base_state_machine_change_state(&sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_WAITING); +} + +/* + * This method is the ready operational substate start io handler for the + * struct scic_sds_port object. This function incremetns the outstanding request + * count for this port object. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + port->started_request_count++; + return SCI_SUCCESS; +} + +/* + * **************************************************************************** + * * READY SUBSTATE OPERATIONAL HANDLERS + * **************************************************************************** */ + +/* + * This is the default method for a port add phy request. It will report a + * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE + */ +static enum sci_status scic_sds_port_ready_configuring_substate_add_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + enum sci_status status; + + status = scic_sds_port_set_phy(port, phy); + + if (status == SCI_SUCCESS) { + scic_sds_port_general_link_up_handler(port, phy, true); + + /* + * Re-enter the configuring state since this may be the last phy in + * the port. */ + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING + ); + } + + return status; +} + +/* + * This is the default method for a port remove phy request. It will report a + * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE + */ +static enum sci_status scic_sds_port_ready_configuring_substate_remove_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + enum sci_status status; + + status = scic_sds_port_clear_phy(port, phy); + + if (status == SCI_SUCCESS) { + scic_sds_port_deactivate_phy(port, phy, true); + + /* + * Re-enter the configuring state since this may be the last phy in + * the port. */ + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING + ); + } + + return status; +} + +/** + * scic_sds_port_ready_configuring_substate_complete_io_handler() - + * @port: This is the port that is being requested to complete the io request. + * @device: This is the device on which the io is completing. + * + * This method will decrement the outstanding request count for this port. If + * the request count goes to 0 then the port can be reprogrammed with its new + * phy data. + */ +static enum sci_status +scic_sds_port_ready_configuring_substate_complete_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + scic_sds_port_decrement_request_count(port); + + if (port->started_request_count == 0) { + sci_base_state_machine_change_state( + &port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL + ); + } + + return SCI_SUCCESS; +} + +static enum sci_status default_port_handler(struct scic_sds_port *sci_port, + const char *func) +{ + dev_warn(sciport_to_dev(sci_port), + "%s: in wrong state: %d\n", func, + sci_base_state_machine_get_state(&sci_port->state_machine)); + return SCI_FAILURE_INVALID_STATE; +} + +static enum sci_status +scic_sds_port_default_start_handler(struct scic_sds_port *sci_port) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_stop_handler(struct scic_sds_port *sci_port) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_destruct_handler(struct scic_sds_port *sci_port) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_reset_handler(struct scic_sds_port *sci_port, + u32 timeout) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_add_phy_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *base_phy) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status +scic_sds_port_default_remove_phy_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *base_phy) +{ + return default_port_handler(sci_port, __func__); +} + +/* + * This is the default method for a port unsolicited frame request. It will + * report a warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE Is it even + * possible to receive an unsolicited frame directed to a port object? It + * seems possible if we implementing virtual functions but until then? + */ +static enum sci_status +scic_sds_port_default_frame_handler(struct scic_sds_port *sci_port, + u32 frame_index) +{ + struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port); + + default_port_handler(sci_port, __func__); + scic_sds_controller_release_frame(scic, frame_index); + + return SCI_FAILURE_INVALID_STATE; +} + +static enum sci_status scic_sds_port_default_event_handler(struct scic_sds_port *sci_port, + u32 event_code) +{ + return default_port_handler(sci_port, __func__); +} + +static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + default_port_handler(sci_port, __func__); +} + +static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + default_port_handler(sci_port, __func__); +} + +static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + return default_port_handler(sci_port, __func__); +} + +static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port, + struct scic_sds_remote_device *sci_dev, + struct scic_sds_request *sci_req) +{ + return default_port_handler(sci_port, __func__); +} + + + +static struct scic_sds_port_state_handler +scic_sds_port_ready_substate_handler_table[SCIC_SDS_PORT_READY_MAX_SUBSTATES] = { + { + /* SCIC_SDS_PORT_READY_SUBSTATE_WAITING */ + scic_sds_port_default_start_handler, + scic_sds_port_ready_substate_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_ready_substate_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_ready_waiting_substate_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_ready_waiting_substate_start_io_handler, + scic_sds_port_ready_substate_complete_io_handler, + }, + + { + /* SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL */ + scic_sds_port_default_start_handler, + scic_sds_port_ready_substate_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_ready_operational_substate_reset_handler, + scic_sds_port_ready_substate_add_phy_handler, + scic_sds_port_ready_substate_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_ready_operational_substate_link_up_handler, + scic_sds_port_ready_operational_substate_link_down_handler, + scic_sds_port_ready_operational_substate_start_io_handler, + scic_sds_port_ready_substate_complete_io_handler, + }, + + { + /* SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING */ + scic_sds_port_default_start_handler, + scic_sds_port_ready_substate_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_ready_configuring_substate_add_phy_handler, + scic_sds_port_ready_configuring_substate_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_ready_configuring_substate_complete_io_handler + } +}; + +/** + * scic_sds_port_set_ready_state_handlers() - + * + * This macro sets the port ready substate handlers. + */ +#define scic_sds_port_set_ready_state_handlers(port, state_id) \ + scic_sds_port_set_state_handlers(\ + port, &scic_sds_port_ready_substate_handler_table[(state_id)] \ + ) + +/* + * ****************************************************************************** + * * PORT STATE PRIVATE METHODS + * ****************************************************************************** */ + +/** + * + * @sci_port: This is the struct scic_sds_port object to suspend. + * + * This method will susped the port task scheduler for this port object. none + */ +static void +scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port) +{ + u32 pts_control_value; + + pts_control_value = readl(&port->port_task_scheduler_registers->control); + pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND); + writel(pts_control_value, &port->port_task_scheduler_registers->control); +} + +/** + * scic_sds_port_post_dummy_request() - post dummy/workaround request + * @sci_port: port to post task + * + * Prevent the hardware scheduler from posting new requests to the front + * of the scheduler queue causing a starvation problem for currently + * ongoing requests. + * + */ +static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port) +{ + u32 command; + struct scu_task_context *task_context; + struct scic_sds_controller *scic = sci_port->owning_controller; + u16 tci = sci_port->reserved_tci; + + task_context = scic_sds_controller_get_task_context_buffer(scic, tci); + + task_context->abort = 0; + + command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | + sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | + tci; + + scic_sds_controller_post_request(scic, command); +} + +/** + * This routine will abort the dummy request. This will alow the hardware to + * power down parts of the silicon to save power. + * + * @sci_port: The port on which the task must be aborted. + * + */ +static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + u16 tci = sci_port->reserved_tci; + struct scu_task_context *tc; + u32 command; + + tc = scic_sds_controller_get_task_context_buffer(scic, tci); + + tc->abort = 1; + + command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT | + sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | + tci; + + scic_sds_controller_post_request(scic, command); +} + +/** + * + * @sci_port: This is the struct scic_sds_port object to resume. + * + * This method will resume the port task scheduler for this port object. none + */ +static void +scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port) +{ + u32 pts_control_value; + + pts_control_value = readl(&port->port_task_scheduler_registers->control); + pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND); + writel(pts_control_value, &port->port_task_scheduler_registers->control); +} + +/* + * ****************************************************************************** + * * PORT READY SUBSTATE METHODS + * ****************************************************************************** */ + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the + * port for any ready phys. If there is at least one phy in a ready state then + * the port transitions to the ready operational substate. none + */ +static void scic_sds_port_ready_substate_waiting_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_set_ready_state_handlers( + sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING + ); + + scic_sds_port_suspend_port_task_scheduler(sci_port); + + sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS; + + if (sci_port->active_phy_mask != 0) { + /* At least one of the phys on the port is ready */ + sci_base_state_machine_change_state( + &sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL + ); + } +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This function will perform the actions required by the struct scic_sds_port + * on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets + * the state handlers for the port object, notifies the SCI User that the port + * is ready, and resumes port operations. none + */ +static void scic_sds_port_ready_substate_operational_enter(void *object) +{ + u32 index; + struct scic_sds_port *sci_port = object; + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_port *iport = sci_port_to_iport(sci_port); + + scic_sds_port_set_ready_state_handlers( + sci_port, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); + + isci_port_ready(ihost, iport); + + for (index = 0; index < SCI_MAX_PHYS; index++) { + if (sci_port->phy_table[index]) { + writel(sci_port->physical_port_index, + &sci_port->port_pe_configuration_register[ + sci_port->phy_table[index]->phy_index]); + } + } + + scic_sds_port_update_viit_entry(sci_port); + + scic_sds_port_resume_port_task_scheduler(sci_port); + + /* + * Post the dummy task for the port so the hardware can schedule + * io correctly + */ + scic_sds_port_post_dummy_request(sci_port); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports + * the port not ready and suspends the port task scheduler. none + */ +static void scic_sds_port_ready_substate_operational_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_port *iport = sci_port_to_iport(sci_port); + + /* + * Kill the dummy task for this port if it has not yet posted + * the hardware will treat this as a NOP and just return abort + * complete. + */ + scic_sds_port_abort_dummy_request(sci_port); + + isci_port_not_ready(ihost, iport); +} + +/* + * ****************************************************************************** + * * PORT READY CONFIGURING METHODS + * ****************************************************************************** */ + +/** + * scic_sds_port_ready_substate_configuring_enter() - + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports + * the port not ready and suspends the port task scheduler. none + */ +static void scic_sds_port_ready_substate_configuring_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_port *iport = sci_port_to_iport(sci_port); + + scic_sds_port_set_ready_state_handlers( + sci_port, + SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); + + if (sci_port->active_phy_mask == 0) { + isci_port_not_ready(ihost, iport); + + sci_base_state_machine_change_state( + &sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_WAITING); + } else if (sci_port->started_request_count == 0) + sci_base_state_machine_change_state( + &sci_port->ready_substate_machine, + SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); +} + +static void scic_sds_port_ready_substate_configuring_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_suspend_port_task_scheduler(sci_port); +} + +/* --------------------------------------------------------------------------- */ + +static const struct sci_base_state scic_sds_port_ready_substate_table[] = { + [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = { + .enter_state = scic_sds_port_ready_substate_waiting_enter, + }, + [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = { + .enter_state = scic_sds_port_ready_substate_operational_enter, + .exit_state = scic_sds_port_ready_substate_operational_exit + }, + [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = { + .enter_state = scic_sds_port_ready_substate_configuring_enter, + .exit_state = scic_sds_port_ready_substate_configuring_exit + }, +}; + +/** + * + * @port: This is the struct scic_sds_port object on which the io request count will + * be decremented. + * @device: This is the struct scic_sds_remote_device object to which the io request + * is being directed. This parameter is not required to complete this + * operation. + * @io_request: This is the request that is being completed on this port + * object. This parameter is not required to complete this operation. + * + * This is a general complete io request handler for the struct scic_sds_port object. + * enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_general_complete_io_handler( + struct scic_sds_port *port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + scic_sds_port_decrement_request_count(port); + + return SCI_SUCCESS; +} + +/** + * scic_sds_port_stopped_state_start_handler() - stop a port from "started" + * + * @port: This is the struct scic_sds_port object which is cast into a + * struct scic_sds_port object. + * + * This function takes the struct scic_sds_port from a stopped state and + * attempts to start it. To start a port it must have no assiged devices and + * it must have at least one phy assigned to it. If those conditions are + * met then the port can transition to the ready state. + * enum sci_status + * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION + * This struct scic_sds_port object could not be started because the port + * configuration is not valid. + * SCI_SUCCESS + * the start request is successful and the struct scic_sds_port object + * has transitioned to the SCI_BASE_PORT_STATE_READY. + */ +static enum sci_status +scic_sds_port_stopped_state_start_handler(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + enum sci_status status = SCI_SUCCESS; + u32 phy_mask; + + if (sci_port->assigned_device_count > 0) { + /* + * @todo This is a start failure operation because + * there are still devices assigned to this port. + * There must be no devices assigned to a port on a + * start operation. + */ + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + + sci_port->timer_handle = + isci_timer_create(ihost, + sci_port, + scic_sds_port_timeout_handler); + + if (!sci_port->timer_handle) + return SCI_FAILURE_INSUFFICIENT_RESOURCES; + + if (sci_port->reserved_rni == SCU_DUMMY_INDEX) { + u16 rni = scic_sds_remote_node_table_allocate_remote_node( + &scic->available_remote_nodes, 1); + + if (rni != SCU_DUMMY_INDEX) + scic_sds_port_construct_dummy_rnc(sci_port, rni); + else + status = SCI_FAILURE_INSUFFICIENT_RESOURCES; + sci_port->reserved_rni = rni; + } + + if (sci_port->reserved_tci == SCU_DUMMY_INDEX) { + /* Allocate a TCI and remove the sequence nibble */ + u16 tci = scic_controller_allocate_io_tag(scic); + + if (tci != SCU_DUMMY_INDEX) + scic_sds_port_construct_dummy_task(sci_port, tci); + else + status = SCI_FAILURE_INSUFFICIENT_RESOURCES; + sci_port->reserved_tci = tci; + } + + if (status == SCI_SUCCESS) { + phy_mask = scic_sds_port_get_phys(sci_port); + + /* + * There are one or more phys assigned to this port. Make sure + * the port's phy mask is in fact legal and supported by the + * silicon. + */ + if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) { + sci_base_state_machine_change_state( + &sci_port->state_machine, + SCI_BASE_PORT_STATE_READY); + + return SCI_SUCCESS; + } else + status = SCI_FAILURE; + } + + if (status != SCI_SUCCESS) + scic_sds_port_destroy_dummy_resources(sci_port); + + return status; +} + +/* + * This method takes the struct scic_sds_port that is in a stopped state and handles a + * stop request. This function takes no action. enum sci_status SCI_SUCCESS the + * stop request is successful as the struct scic_sds_port object is already stopped. + */ +static enum sci_status scic_sds_port_stopped_state_stop_handler( + struct scic_sds_port *port) +{ + /* We are already stopped so there is nothing to do here */ + return SCI_SUCCESS; +} + +/* + * This method takes the struct scic_sds_port that is in a stopped state and handles + * the destruct request. The stopped state is the only state in which the + * struct scic_sds_port can be destroyed. This function causes the port object to + * transition to the SCI_BASE_PORT_STATE_FINAL. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_stopped_state_destruct_handler( + struct scic_sds_port *port) +{ + sci_base_state_machine_stop(&port->state_machine); + + return SCI_SUCCESS; +} + +/* + * This method takes the struct scic_sds_port that is in a stopped state and handles + * the add phy request. In MPC mode the only time a phy can be added to a port + * is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status + * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not + * be added to the port. SCI_SUCCESS if the phy is added to the port. + */ +static enum sci_status scic_sds_port_stopped_state_add_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + struct sci_sas_address port_sas_address; + + /* Read the port assigned SAS Address if there is one */ + scic_sds_port_get_sas_address(port, &port_sas_address); + + if (port_sas_address.high != 0 && port_sas_address.low != 0) { + struct sci_sas_address phy_sas_address; + + /* + * Make sure that the PHY SAS Address matches the SAS Address + * for this port. */ + scic_sds_phy_get_sas_address(phy, &phy_sas_address); + + if ( + (port_sas_address.high != phy_sas_address.high) + || (port_sas_address.low != phy_sas_address.low) + ) { + return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; + } + } + + return scic_sds_port_set_phy(port, phy); +} + +/* + * This method takes the struct scic_sds_port that is in a stopped state and handles + * the remove phy request. In MPC mode the only time a phy can be removed from + * a port is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status + * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not + * be added to the port. SCI_SUCCESS if the phy is added to the port. + */ +static enum sci_status scic_sds_port_stopped_state_remove_phy_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + return scic_sds_port_clear_phy(port, phy); +} + +/* + * **************************************************************************** + * * READY STATE HANDLERS + * **************************************************************************** */ + +/* + * **************************************************************************** + * * RESETTING STATE HANDLERS + * **************************************************************************** */ + +/* + * **************************************************************************** + * * STOPPING STATE HANDLERS + * **************************************************************************** */ + +/* + * This method takes the struct scic_sds_port that is in a stopping state and handles + * the complete io request. Should the request count reach 0 then the port + * object will transition to the stopped state. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_stopping_state_complete_io_handler( + struct scic_sds_port *sci_port, + struct scic_sds_remote_device *device, + struct scic_sds_request *io_request) +{ + scic_sds_port_decrement_request_count(sci_port); + + if (sci_port->started_request_count == 0) { + sci_base_state_machine_change_state(&sci_port->state_machine, + SCI_BASE_PORT_STATE_STOPPED); + } + + return SCI_SUCCESS; +} + +/* + * **************************************************************************** + * * RESETTING STATE HANDLERS + * **************************************************************************** */ + +/** + * + * @port: This is the port object which is being requested to stop. + * + * This method will stop a failed port. This causes a transition to the + * stopping state. enum sci_status SCI_SUCCESS + */ +static enum sci_status scic_sds_port_reset_state_stop_handler( + struct scic_sds_port *port) +{ + sci_base_state_machine_change_state( + &port->state_machine, + SCI_BASE_PORT_STATE_STOPPING + ); + + return SCI_SUCCESS; +} + +/* + * This method will transition a failed port to its ready state. The port + * failed because a hard reset request timed out but at some time later one or + * more phys in the port became ready. enum sci_status SCI_SUCCESS + */ +static void scic_sds_port_reset_state_link_up_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + /* + * / @todo We should make sure that the phy that has gone link up is the same + * / one on which we sent the reset. It is possible that the phy on + * / which we sent the reset is not the one that has gone link up and we + * / want to make sure that phy being reset comes back. Consider the + * / case where a reset is sent but before the hardware processes the + * / reset it get a link up on the port because of a hot plug event. + * / because of the reset request this phy will go link down almost + * / immediately. */ + + /* + * In the resetting state we don't notify the user regarding + * link up and link down notifications. */ + scic_sds_port_general_link_up_handler(port, phy, false); +} + +/* + * This method process link down notifications that occur during a port reset + * operation. Link downs can occur during the reset operation. enum sci_status + * SCI_SUCCESS + */ +static void scic_sds_port_reset_state_link_down_handler( + struct scic_sds_port *port, + struct scic_sds_phy *phy) +{ + /* + * In the resetting state we don't notify the user regarding + * link up and link down notifications. */ + scic_sds_port_deactivate_phy(port, phy, false); +} + +static struct scic_sds_port_state_handler +scic_sds_port_state_handler_table[SCI_BASE_PORT_MAX_STATES] = +{ + /* SCI_BASE_PORT_STATE_STOPPED */ + { + scic_sds_port_stopped_state_start_handler, + scic_sds_port_stopped_state_stop_handler, + scic_sds_port_stopped_state_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_stopped_state_add_phy_handler, + scic_sds_port_stopped_state_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_default_complete_io_handler + }, + /* SCI_BASE_PORT_STATE_STOPPING */ + { + scic_sds_port_default_start_handler, + scic_sds_port_default_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_default_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_stopping_state_complete_io_handler + }, + /* SCI_BASE_PORT_STATE_READY */ + { + scic_sds_port_default_start_handler, + scic_sds_port_default_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_default_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_general_complete_io_handler + }, + /* SCI_BASE_PORT_STATE_RESETTING */ + { + scic_sds_port_default_start_handler, + scic_sds_port_reset_state_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_default_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_reset_state_link_up_handler, + scic_sds_port_reset_state_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_general_complete_io_handler + }, + /* SCI_BASE_PORT_STATE_FAILED */ + { + scic_sds_port_default_start_handler, + scic_sds_port_default_stop_handler, + scic_sds_port_default_destruct_handler, + scic_sds_port_default_reset_handler, + scic_sds_port_default_add_phy_handler, + scic_sds_port_default_remove_phy_handler, + scic_sds_port_default_frame_handler, + scic_sds_port_default_event_handler, + scic_sds_port_default_link_up_handler, + scic_sds_port_default_link_down_handler, + scic_sds_port_default_start_io_handler, + scic_sds_port_general_complete_io_handler + } +}; + +/* + * ****************************************************************************** + * * PORT STATE PRIVATE METHODS + * ****************************************************************************** */ + +/** + * + * @sci_port: This is the port object which to suspend. + * + * This method will enable the SCU Port Task Scheduler for this port object but + * will leave the port task scheduler in a suspended state. none + */ +static void +scic_sds_port_enable_port_task_scheduler(struct scic_sds_port *port) +{ + u32 pts_control_value; + + pts_control_value = readl(&port->port_task_scheduler_registers->control); + pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND); + writel(pts_control_value, &port->port_task_scheduler_registers->control); +} + +/** + * + * @sci_port: This is the port object which to resume. + * + * This method will disable the SCU port task scheduler for this port object. + * none + */ +static void +scic_sds_port_disable_port_task_scheduler(struct scic_sds_port *port) +{ + u32 pts_control_value; + + pts_control_value = readl(&port->port_task_scheduler_registers->control); + pts_control_value &= + ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND)); + writel(pts_control_value, &port->port_task_scheduler_registers->control); +} + +static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + u8 phys_index = sci_port->physical_port_index; + union scu_remote_node_context *rnc; + u16 rni = sci_port->reserved_rni; + u32 command; + + rnc = &scic->remote_node_context_table[rni]; + rnc->ssp.is_valid = true; + + command = SCU_CONTEXT_COMMAND_POST_RNC_32 | + phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; + + scic_sds_controller_post_request(scic, command); + + /* ensure hardware has seen the post rnc command and give it + * ample time to act before sending the suspend + */ + readl(&scic->smu_registers->interrupt_status); /* flush */ + udelay(10); + + command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX | + phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; + + scic_sds_controller_post_request(scic, command); +} + +static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + u8 phys_index = sci_port->physical_port_index; + union scu_remote_node_context *rnc; + u16 rni = sci_port->reserved_rni; + u32 command; + + rnc = &scic->remote_node_context_table[rni]; + + rnc->ssp.is_valid = false; + + /* ensure the preceding tc abort request has reached the + * controller and give it ample time to act before posting the rnc + * invalidate + */ + readl(&scic->smu_registers->interrupt_status); /* flush */ + udelay(10); + + command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE | + phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; + + scic_sds_controller_post_request(scic, command); +} + +/* + * ****************************************************************************** + * * PORT STATE METHODS + * ****************************************************************************** */ + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped + * state handlers for the struct scic_sds_port object and disables the port task + * scheduler in the hardware. none + */ +static void scic_sds_port_stopped_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_set_base_state_handlers( + sci_port, SCI_BASE_PORT_STATE_STOPPED + ); + + if ( + SCI_BASE_PORT_STATE_STOPPING + == sci_port->state_machine.previous_state_id + ) { + /* + * If we enter this state becasuse of a request to stop + * the port then we want to disable the hardwares port + * task scheduler. */ + scic_sds_port_disable_port_task_scheduler(sci_port); + } +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware + * port task scheduler. none + */ +static void scic_sds_port_stopped_state_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + /* Enable and suspend the port task scheduler */ + scic_sds_port_enable_port_task_scheduler(sci_port); +} + +/** + * scic_sds_port_ready_state_enter - + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state + * handlers for the struct scic_sds_port object, reports the port object as + * not ready and starts the ready substate machine. none + */ +static void scic_sds_port_ready_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + struct isci_port *iport = sci_port_to_iport(sci_port); + u32 prev_state; + + /* Put the ready state handlers in place though they will not be there long */ + scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY); + + prev_state = sci_port->state_machine.previous_state_id; + if (prev_state == SCI_BASE_PORT_STATE_RESETTING) + isci_port_hard_reset_complete(iport, SCI_SUCCESS); + else + isci_port_not_ready(ihost, iport); + + /* Post and suspend the dummy remote node context for this port. */ + scic_sds_port_post_dummy_remote_node(sci_port); + + /* Start the ready substate machine */ + sci_base_state_machine_start(&sci_port->ready_substate_machine); +} + +static void scic_sds_port_ready_state_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + sci_base_state_machine_stop(&sci_port->ready_substate_machine); + scic_sds_port_invalidate_dummy_remote_node(sci_port); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting + * state handlers for the struct scic_sds_port object. none + */ +static void scic_sds_port_resetting_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_set_base_state_handlers( + sci_port, SCI_BASE_PORT_STATE_RESETTING + ); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This function will perform the actions required by the + * struct scic_sds_port on + * exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none + */ +static inline void scic_sds_port_resetting_state_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + isci_timer_stop(sci_port->timer_handle); +} + +/** + * + * @object: This is the void object which is cast to a + * struct scic_sds_port object. + * + * This method will perform the actions required by the struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping + * state handlers for the struct scic_sds_port object. none + */ +static void scic_sds_port_stopping_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + + scic_sds_port_set_base_state_handlers( + sci_port, SCI_BASE_PORT_STATE_STOPPING + ); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This function will perform the actions required by the + * struct scic_sds_port on + * exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none + */ +static inline void +scic_sds_port_stopping_state_exit(void *object) +{ + struct scic_sds_port *sci_port = object; + + isci_timer_stop(sci_port->timer_handle); + + scic_sds_port_destroy_dummy_resources(sci_port); +} + +/** + * + * @object: This is the object which is cast to a struct scic_sds_port object. + * + * This function will perform the actions required by the + * struct scic_sds_port on + * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping + * state handlers for the struct scic_sds_port object. none + */ +static void scic_sds_port_failed_state_enter(void *object) +{ + struct scic_sds_port *sci_port = object; + struct isci_port *iport = sci_port_to_iport(sci_port); + + scic_sds_port_set_base_state_handlers(sci_port, + SCI_BASE_PORT_STATE_FAILED); + + isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); +} + +/* --------------------------------------------------------------------------- */ + +static const struct sci_base_state scic_sds_port_state_table[] = { + [SCI_BASE_PORT_STATE_STOPPED] = { + .enter_state = scic_sds_port_stopped_state_enter, + .exit_state = scic_sds_port_stopped_state_exit + }, + [SCI_BASE_PORT_STATE_STOPPING] = { + .enter_state = scic_sds_port_stopping_state_enter, + .exit_state = scic_sds_port_stopping_state_exit + }, + [SCI_BASE_PORT_STATE_READY] = { + .enter_state = scic_sds_port_ready_state_enter, + .exit_state = scic_sds_port_ready_state_exit + }, + [SCI_BASE_PORT_STATE_RESETTING] = { + .enter_state = scic_sds_port_resetting_state_enter, + .exit_state = scic_sds_port_resetting_state_exit + }, + [SCI_BASE_PORT_STATE_FAILED] = { + .enter_state = scic_sds_port_failed_state_enter, + } +}; + +void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index, + struct scic_sds_controller *scic) +{ + sci_base_state_machine_construct(&sci_port->state_machine, + sci_port, + scic_sds_port_state_table, + SCI_BASE_PORT_STATE_STOPPED); + + sci_base_state_machine_start(&sci_port->state_machine); + + sci_base_state_machine_construct(&sci_port->ready_substate_machine, + sci_port, + scic_sds_port_ready_substate_table, + SCIC_SDS_PORT_READY_SUBSTATE_WAITING); + + sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT; + sci_port->physical_port_index = index; + sci_port->active_phy_mask = 0; + + sci_port->owning_controller = scic; + + sci_port->started_request_count = 0; + sci_port->assigned_device_count = 0; + + sci_port->reserved_rni = SCU_DUMMY_INDEX; + sci_port->reserved_tci = SCU_DUMMY_INDEX; + + sci_port->timer_handle = NULL; + sci_port->port_task_scheduler_registers = NULL; + + for (index = 0; index < SCI_MAX_PHYS; index++) + sci_port->phy_table[index] = NULL; +} + +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; +} + +static void isci_port_bc_change_received(struct isci_host *ihost, + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); + + dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n", + __func__, iphy, &iphy->sas_phy); + + ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); + scic_port_enable_broadcast_change_notification(sci_port); +} + +void scic_sds_port_broadcast_change_received( + struct scic_sds_port *sci_port, + struct scic_sds_phy *sci_phy) +{ + struct scic_sds_controller *scic = sci_port->owning_controller; + struct isci_host *ihost = scic_to_ihost(scic); + + /* notify the user. */ + isci_port_bc_change_received(ihost, sci_port, sci_phy); +} + int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport, struct isci_phy *iphy) { @@ -359,9 +2675,24 @@ int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *ipor return ret; } -void isci_port_stop_complete(struct scic_sds_controller *scic, - struct scic_sds_port *sci_port, - enum sci_status completion_status) +/** + * 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. + * + */ +void isci_port_deformed(struct asd_sas_phy *phy) { - dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n"); + pr_debug("%s: sas_phy = %p\n", __func__, phy); +} + +/** + * 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); } |
