| /* |
| * This file is provided under a dual BSD/GPLv2 license. When using or |
| * redistributing this file, you may do so under either license. |
| * |
| * GPL LICENSE SUMMARY |
| * |
| * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| * The full GNU General Public License is included in this distribution |
| * in the file called LICENSE.GPL. |
| * |
| * BSD LICENSE |
| * |
| * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Intel Corporation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "isci.h" |
| #include "port.h" |
| #include "request.h" |
| |
| #define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000) |
| #define SCU_DUMMY_INDEX (0xFFFF) |
| |
| #undef C |
| #define C(a) (#a) |
| const char *port_state_name(enum sci_port_states state) |
| { |
| 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; |
| |
| table = iport - i; |
| ihost = container_of(table, typeof(*ihost), ports[0]); |
| |
| return &ihost->pdev->dev; |
| } |
| |
| static void sci_port_get_protocols(struct isci_port *iport, struct sci_phy_proto *proto) |
| { |
| u8 index; |
| |
| proto->all = 0; |
| for (index = 0; index < SCI_MAX_PHYS; index++) { |
| struct isci_phy *iphy = iport->phy_table[index]; |
| |
| if (!iphy) |
| continue; |
| sci_phy_get_protocols(iphy, proto); |
| } |
| } |
| |
| static u32 sci_port_get_phys(struct isci_port *iport) |
| { |
| u32 index; |
| u32 mask; |
| |
| mask = 0; |
| for (index = 0; index < SCI_MAX_PHYS; index++) |
| if (iport->phy_table[index]) |
| mask |= (1 << index); |
| |
| return mask; |
| } |
| |
| /** |
| * sci_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. |
| */ |
| enum sci_status sci_port_get_properties(struct isci_port *iport, |
| struct sci_port_properties *prop) |
| { |
| if (!iport || iport->logical_port_index == SCIC_SDS_DUMMY_PORT) |
| return SCI_FAILURE_INVALID_PORT; |
| |
| prop->index = iport->logical_port_index; |
| prop->phy_mask = sci_port_get_phys(iport); |
| sci_port_get_sas_address(iport, &prop->local.sas_address); |
| sci_port_get_protocols(iport, &prop->local.protocols); |
| sci_port_get_attached_sas_address(iport, &prop->remote.sas_address); |
| |
| return SCI_SUCCESS; |
| } |
| |
| static void sci_port_bcn_enable(struct isci_port *iport) |
| { |
| struct isci_phy *iphy; |
| u32 val; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(iport->phy_table); i++) { |
| iphy = iport->phy_table[i]; |
| if (!iphy) |
| continue; |
| val = readl(&iphy->link_layer_registers->link_layer_control); |
| /* clear the bit by writing 1. */ |
| writel(val, &iphy->link_layer_registers->link_layer_control); |
| } |
| } |
| |
| static void isci_port_bc_change_received(struct isci_host *ihost, |
| struct isci_port *iport, |
| struct isci_phy *iphy) |
| { |
| dev_dbg(&ihost->pdev->dev, |
| "%s: isci_phy = %p, sas_phy = %p\n", |
| __func__, iphy, &iphy->sas_phy); |
| |
| ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); |
| sci_port_bcn_enable(iport); |
| } |
| |
| static void isci_port_link_up(struct isci_host *isci_host, |
| struct isci_port *iport, |
| struct isci_phy *iphy) |
| { |
| unsigned long flags; |
| struct sci_port_properties properties; |
| unsigned long success = true; |
| |
| dev_dbg(&isci_host->pdev->dev, |
| "%s: isci_port = %p\n", |
| __func__, iport); |
| |
| spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags); |
| |
| sci_port_get_properties(iport, &properties); |
| |
| if (iphy->protocol == SAS_PROTOCOL_SATA) { |
| u64 attached_sas_address; |
| |
| iphy->sas_phy.oob_mode = SATA_OOB_MODE; |
| iphy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis); |
| |
| /* |
| * For direct-attached SATA devices, the SCI core will |
| * automagically assign a SAS address to the end device |
| * for the purpose of creating a port. This SAS address |
| * will not be the same as assigned to the PHY and needs |
| * to be obtained from struct sci_port_properties properties. |
| */ |
| attached_sas_address = properties.remote.sas_address.high; |
| attached_sas_address <<= 32; |
| attached_sas_address |= properties.remote.sas_address.low; |
| swab64s(&attached_sas_address); |
| |
| memcpy(&iphy->sas_phy.attached_sas_addr, |
| &attached_sas_address, sizeof(attached_sas_address)); |
| } else if (iphy->protocol == SAS_PROTOCOL_SSP) { |
| iphy->sas_phy.oob_mode = SAS_OOB_MODE; |
| iphy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame); |
| |
| /* Copy the attached SAS address from the IAF */ |
| memcpy(iphy->sas_phy.attached_sas_addr, |
| iphy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE); |
| } else { |
| dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__); |
| success = false; |
| } |
| |
| iphy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(iphy); |
| |
| spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags); |
| |
| /* Notify libsas that we have an address frame, if indeed |
| * we've found an SSP, SMP, or STP target */ |
| if (success) |
| isci_host->sas_ha.notify_port_event(&iphy->sas_phy, |
| PORTE_BYTES_DMAED); |
| } |
| |
| |
| /** |
| * isci_port_link_down() - This function is called by the sci core when a link |
| * becomes inactive. |
| * @isci_host: This parameter specifies the isci host object. |
| * @phy: This parameter specifies the isci phy with the active link. |
| * @port: This parameter specifies the isci port with the active link. |
| * |
| */ |
| 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; |
| |
| dev_dbg(&isci_host->pdev->dev, |
| "%s: isci_port = %p\n", __func__, isci_port); |
| |
| if (isci_port) { |
| |
| /* check to see if this is the last phy on this port. */ |
| if (isci_phy->sas_phy.port && |
| isci_phy->sas_phy.port->num_phys == 1) { |
| /* change the state for all devices on this port. The |
| * next task sent to this device will be returned as |
| * SAS_TASK_UNDELIVERED, and the scsi mid layer will |
| * remove the target |
| */ |
| list_for_each_entry(isci_device, |
| &isci_port->remote_dev_list, |
| node) { |
| dev_dbg(&isci_host->pdev->dev, |
| "%s: isci_device = %p\n", |
| __func__, isci_device); |
| set_bit(IDEV_GONE, &isci_device->flags); |
| } |
| } |
| } |
| |
| /* Notify libsas of the borken link, this will trigger calls to our |
| * isci_port_deformed and isci_dev_gone functions. |
| */ |
| sas_phy_disconnected(&isci_phy->sas_phy); |
| isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy, |
| PHYE_LOSS_OF_SIGNAL); |
| |
| dev_dbg(&isci_host->pdev->dev, |
| "%s: isci_port = %p - Done\n", __func__, isci_port); |
| } |
| |
| static bool is_port_ready_state(enum sci_port_states state) |
| { |
| switch (state) { |
| case SCI_PORT_READY: |
| case SCI_PORT_SUB_WAITING: |
| case SCI_PORT_SUB_OPERATIONAL: |
| case SCI_PORT_SUB_CONFIGURING: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| /* flag dummy rnc hanling when exiting a ready state */ |
| static void port_state_machine_change(struct isci_port *iport, |
| enum sci_port_states state) |
| { |
| struct sci_base_state_machine *sm = &iport->sm; |
| enum sci_port_states old_state = sm->current_state_id; |
| |
| if (is_port_ready_state(old_state) && !is_port_ready_state(state)) |
| iport->ready_exit = true; |
| |
| sci_change_state(sm, state); |
| iport->ready_exit = false; |
| } |
| |
| /** |
| * isci_port_hard_reset_complete() - This function is called by the sci core |
| * when the hard reset complete notification has been received. |
| * @port: This parameter specifies the sci port with the active link. |
| * @completion_status: This parameter specifies the core status for the reset |
| * process. |
| * |
| */ |
| static void isci_port_hard_reset_complete(struct isci_port *isci_port, |
| enum sci_status completion_status) |
| { |
| 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); |
| |
| /* Save the status of the hard reset from the port. */ |
| isci_port->hard_reset_status = completion_status; |
| |
| if (completion_status != SCI_SUCCESS) { |
| |
| /* 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(ihost, iphy, isci_port); |
| } |
| /* Advance the port state so that link state changes will be |
| * noticed. |
| */ |
| port_state_machine_change(isci_port, SCI_PORT_SUB_WAITING); |
| |
| } |
| 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 |
| * 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 |
| * sci_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 sci_port_is_valid_phy_assignment(struct isci_port *iport, u32 phy_index) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| struct sci_user_parameters *user = &ihost->user_parameters; |
| |
| /* Initialize to invalid value. */ |
| u32 existing_phy_index = SCI_MAX_PHYS; |
| u32 index; |
| |
| if ((iport->physical_port_index == 1) && (phy_index != 1)) |
| return false; |
| |
| if (iport->physical_port_index == 3 && phy_index != 3) |
| return false; |
| |
| if (iport->physical_port_index == 2 && |
| (phy_index == 0 || phy_index == 1)) |
| return false; |
| |
| for (index = 0; index < SCI_MAX_PHYS; index++) |
| if (iport->phy_table[index] && 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 && |
| user->phys[phy_index].max_speed_generation != |
| user->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 sci_port_is_phy_mask_valid( |
| struct isci_port *iport, |
| u32 phy_mask) |
| { |
| if (iport->physical_port_index == 0) { |
| if (((phy_mask & 0x0F) == 0x0F) |
| || ((phy_mask & 0x03) == 0x03) |
| || ((phy_mask & 0x01) == 0x01) |
| || (phy_mask == 0)) |
| return true; |
| } else if (iport->physical_port_index == 1) { |
| if (((phy_mask & 0x02) == 0x02) |
| || (phy_mask == 0)) |
| return true; |
| } else if (iport->physical_port_index == 2) { |
| if (((phy_mask & 0x0C) == 0x0C) |
| || ((phy_mask & 0x04) == 0x04) |
| || (phy_mask == 0)) |
| return true; |
| } else if (iport->physical_port_index == 3) { |
| if (((phy_mask & 0x08) == 0x08) |
| || (phy_mask == 0)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* |
| * 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 sci_phy |
| * object that is active in the port. |
| */ |
| static struct isci_phy *sci_port_get_a_connected_phy(struct isci_port *iport) |
| { |
| u32 index; |
| struct isci_phy *iphy; |
| |
| 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. |
| */ |
| iphy = iport->phy_table[index]; |
| if (iphy && sci_port_active_phy(iport, iphy)) |
| return iphy; |
| } |
| |
| return NULL; |
| } |
| |
| static enum sci_status sci_port_set_phy(struct isci_port *iport, struct isci_phy *iphy) |
| { |
| /* 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 (!iport->phy_table[iphy->phy_index] && |
| !phy_get_non_dummy_port(iphy) && |
| sci_port_is_valid_phy_assignment(iport, iphy->phy_index)) { |
| /* Phy is being added in the stopped state so we are in MPC mode |
| * make logical port index = physical port index |
| */ |
| iport->logical_port_index = iport->physical_port_index; |
| iport->phy_table[iphy->phy_index] = iphy; |
| sci_phy_set_port(iphy, iport); |
| |
| return SCI_SUCCESS; |
| } |
| |
| return SCI_FAILURE; |
| } |
| |
| static enum sci_status sci_port_clear_phy(struct isci_port *iport, struct isci_phy *iphy) |
| { |
| /* Make sure that this phy is part of this port */ |
| if (iport->phy_table[iphy->phy_index] == iphy && |
| phy_get_non_dummy_port(iphy) == iport) { |
| struct isci_host *ihost = iport->owning_controller; |
| |
| /* Yep it is assigned to this port so remove it */ |
| sci_phy_set_port(iphy, &ihost->ports[SCI_MAX_PORTS]); |
| iport->phy_table[iphy->phy_index] = NULL; |
| return SCI_SUCCESS; |
| } |
| |
| return SCI_FAILURE; |
| } |
| |
| void sci_port_get_sas_address(struct isci_port *iport, struct sci_sas_address *sas) |
| { |
| u32 index; |
| |
| sas->high = 0; |
| sas->low = 0; |
| for (index = 0; index < SCI_MAX_PHYS; index++) |
| if (iport->phy_table[index]) |
| sci_phy_get_sas_address(iport->phy_table[index], sas); |
| } |
| |
| void sci_port_get_attached_sas_address(struct isci_port *iport, struct sci_sas_address *sas) |
| { |
| struct isci_phy *iphy; |
| |
| /* |
| * Ensure that the phy is both part of the port and currently |
| * connected to the remote end-point. |
| */ |
| iphy = sci_port_get_a_connected_phy(iport); |
| if (iphy) { |
| if (iphy->protocol != SAS_PROTOCOL_SATA) { |
| sci_phy_get_attached_sas_address(iphy, sas); |
| } else { |
| sci_phy_get_sas_address(iphy, sas); |
| sas->low += iphy->phy_index; |
| } |
| } else { |
| sas->high = 0; |
| sas->low = 0; |
| } |
| } |
| |
| /** |
| * sci_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 sci_port_construct_dummy_rnc(struct isci_port *iport, u16 rni) |
| { |
| union scu_remote_node_context *rnc; |
| |
| rnc = &iport->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 = iport->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; |
| } |
| |
| /* |
| * 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 sci_port_construct_dummy_task(struct isci_port *iport, u16 tag) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| struct scu_task_context *task_context; |
| |
| task_context = &ihost->task_context_table[ISCI_TAG_TCI(tag)]; |
| memset(task_context, 0, sizeof(struct scu_task_context)); |
| |
| task_context->initiator_request = 1; |
| task_context->connection_rate = 1; |
| task_context->logical_port_index = iport->physical_port_index; |
| task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; |
| task_context->task_index = ISCI_TAG_TCI(tag); |
| task_context->valid = SCU_TASK_CONTEXT_VALID; |
| task_context->context_type = SCU_TASK_CONTEXT_TYPE; |
| task_context->remote_node_index = iport->reserved_rni; |
| task_context->do_not_dma_ssp_good_response = 1; |
| task_context->task_phase = 0x01; |
| } |
| |
| static void sci_port_destroy_dummy_resources(struct isci_port *iport) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| |
| if (iport->reserved_tag != SCI_CONTROLLER_INVALID_IO_TAG) |
| isci_free_tag(ihost, iport->reserved_tag); |
| |
| if (iport->reserved_rni != SCU_DUMMY_INDEX) |
| sci_remote_node_table_release_remote_node_index(&ihost->available_remote_nodes, |
| 1, iport->reserved_rni); |
| |
| iport->reserved_rni = SCU_DUMMY_INDEX; |
| iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG; |
| } |
| |
| void sci_port_setup_transports(struct isci_port *iport, u32 device_id) |
| { |
| u8 index; |
| |
| for (index = 0; index < SCI_MAX_PHYS; index++) { |
| if (iport->active_phy_mask & (1 << index)) |
| sci_phy_setup_transport(iport->phy_table[index], device_id); |
| } |
| } |
| |
| static void sci_port_resume_phy(struct isci_port *iport, struct isci_phy *iphy) |
| { |
| sci_phy_resume(iphy); |
| iport->enabled_phy_mask |= 1 << iphy->phy_index; |
| } |
| |
| static void sci_port_activate_phy(struct isci_port *iport, |
| struct isci_phy *iphy, |
| u8 flags) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| |
| if (iphy->protocol != SAS_PROTOCOL_SATA && (flags & PF_RESUME)) |
| sci_phy_resume(iphy); |
| |
| iport->active_phy_mask |= 1 << iphy->phy_index; |
| |
| sci_controller_clear_invalid_phy(ihost, iphy); |
| |
| if (flags & PF_NOTIFY) |
| isci_port_link_up(ihost, iport, iphy); |
| } |
| |
| void sci_port_deactivate_phy(struct isci_port *iport, struct isci_phy *iphy, |
| bool do_notify_user) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| |
| iport->active_phy_mask &= ~(1 << iphy->phy_index); |
| iport->enabled_phy_mask &= ~(1 << iphy->phy_index); |
| if (!iport->active_phy_mask) |
| iport->last_active_phy = iphy->phy_index; |
| |
| iphy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; |
| |
| /* Re-assign the phy back to the LP as if it were a narrow port for APC |
| * mode. For MPC mode, the phy will remain in the port. |
| */ |
| if (iport->owning_controller->oem_parameters.controller.mode_type == |
| SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE) |
| writel(iphy->phy_index, |
| &iport->port_pe_configuration_register[iphy->phy_index]); |
| |
| if (do_notify_user == true) |
| isci_port_link_down(ihost, iphy, iport); |
| } |
| |
| static void sci_port_invalid_link_up(struct isci_port *iport, struct isci_phy *iphy) |
| { |
| struct isci_host *ihost = iport->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 ((ihost->invalid_phy_mask & (1 << iphy->phy_index)) == 0) { |
| ihost->invalid_phy_mask |= 1 << iphy->phy_index; |
| dev_warn(&ihost->pdev->dev, "Invalid link up!\n"); |
| } |
| } |
| |
| /** |
| * sci_port_general_link_up_handler - phy can be assigned to port? |
| * @sci_port: sci_port object for which has a phy that has gone link up. |
| * @sci_phy: This is the struct isci_phy object that has gone link up. |
| * @flags: PF_RESUME, PF_NOTIFY to sci_port_activate_phy |
| * |
| * 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. |
| */ |
| static void sci_port_general_link_up_handler(struct isci_port *iport, |
| struct isci_phy *iphy, |
| u8 flags) |
| { |
| struct sci_sas_address port_sas_address; |
| struct sci_sas_address phy_sas_address; |
| |
| sci_port_get_attached_sas_address(iport, &port_sas_address); |
| sci_phy_get_attached_sas_address(iphy, &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) || |
| iport->active_phy_mask == 0) { |
| struct sci_base_state_machine *sm = &iport->sm; |
| |
| sci_port_activate_phy(iport, iphy, flags); |
| if (sm->current_state_id == SCI_PORT_RESETTING) |
| port_state_machine_change(iport, SCI_PORT_READY); |
| } else |
| sci_port_invalid_link_up(iport, iphy); |
| } |
| |
| |
| |
| /** |
| * 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 sci_port_is_wide(struct isci_port *iport) |
| { |
| u32 index; |
| u32 phy_count = 0; |
| |
| for (index = 0; index < SCI_MAX_PHYS; index++) { |
| if (iport->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 sci_port_link_detected(struct isci_port *iport, struct isci_phy *iphy) |
| { |
| if ((iport->logical_port_index != SCIC_SDS_DUMMY_PORT) && |
| (iphy->protocol == SAS_PROTOCOL_SATA)) { |
| if (sci_port_is_wide(iport)) { |
| sci_port_invalid_link_up(iport, iphy); |
| return false; |
| } else { |
| struct isci_host *ihost = iport->owning_controller; |
| struct isci_port *dst_port = &(ihost->ports[iphy->phy_index]); |
| writel(iphy->phy_index, |
| &dst_port->port_pe_configuration_register[iphy->phy_index]); |
| } |
| } |
| |
| return true; |
| } |
| |
| static void port_timeout(unsigned long data) |
| { |
| struct sci_timer *tmr = (struct sci_timer *)data; |
| struct isci_port *iport = container_of(tmr, typeof(*iport), timer); |
| struct isci_host *ihost = iport->owning_controller; |
| unsigned long flags; |
| u32 current_state; |
| |
| spin_lock_irqsave(&ihost->scic_lock, flags); |
| |
| if (tmr->cancel) |
| goto done; |
| |
| current_state = iport->sm.current_state_id; |
| |
| if (current_state == SCI_PORT_RESETTING) { |
| /* if the port is still in the resetting state then the timeout |
| * fired before the reset completed. |
| */ |
| port_state_machine_change(iport, SCI_PORT_FAILED); |
| } else if (current_state == SCI_PORT_STOPPED) { |
| /* if the port is stopped then the start request failed In this |
| * case stay in the stopped state. |
| */ |
| dev_err(sciport_to_dev(iport), |
| "%s: SCIC Port 0x%p failed to stop before tiemout.\n", |
| __func__, |
| iport); |
| } else if (current_state == SCI_PORT_STOPPING) { |
| 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. |
| */ |
| dev_err(sciport_to_dev(iport), |
| "%s: SCIC Port 0x%p is processing a timeout operation " |
| "in state %d.\n", __func__, iport, current_state); |
| } |
| |
| done: |
| spin_unlock_irqrestore(&ihost->scic_lock, flags); |
| } |
| |
| /* --------------------------------------------------------------------------- */ |
| |
| /** |
| * This function updates the hardwares VIIT entry for this port. |
| * |
| * |
| */ |
| static void sci_port_update_viit_entry(struct isci_port *iport) |
| { |
| struct sci_sas_address sas_address; |
| |
| sci_port_get_sas_address(iport, &sas_address); |
| |
| writel(sas_address.high, |
| &iport->viit_registers->initiator_sas_address_hi); |
| writel(sas_address.low, |
| &iport->viit_registers->initiator_sas_address_lo); |
| |
| /* This value get cleared just in case its not already cleared */ |
| writel(0, &iport->viit_registers->reserved); |
| |
| /* We are required to update the status register last */ |
| writel(SCU_VIIT_ENTRY_ID_VIIT | |
| SCU_VIIT_IPPT_INITIATOR | |
| ((1 << iport->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) | |
| SCU_VIIT_STATUS_ALL_VALID, |
| &iport->viit_registers->status); |
| } |
| |
| enum sas_linkrate sci_port_get_max_allowed_speed(struct isci_port *iport) |
| { |
| u16 index; |
| struct isci_phy *iphy; |
| enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS; |
| |
| /* |
| * 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++) { |
| iphy = iport->phy_table[index]; |
| if (iphy && sci_port_active_phy(iport, iphy) && |
| iphy->max_negotiated_speed < max_allowed_speed) |
| max_allowed_speed = iphy->max_negotiated_speed; |
| } |
| |
| return max_allowed_speed; |
| } |
| |
| static void sci_port_suspend_port_task_scheduler(struct isci_port *iport) |
| { |
| u32 pts_control_value; |
| |
| pts_control_value = readl(&iport->port_task_scheduler_registers->control); |
| pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND); |
| writel(pts_control_value, &iport->port_task_scheduler_registers->control); |
| } |
| |
| /** |
| * sci_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 sci_port_post_dummy_request(struct isci_port *iport) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| u16 tag = iport->reserved_tag; |
| struct scu_task_context *tc; |
| u32 command; |
| |
| tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)]; |
| tc->abort = 0; |
| |
| command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | |
| iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | |
| ISCI_TAG_TCI(tag); |
| |
| sci_controller_post_request(ihost, 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 sci_port_abort_dummy_request(struct isci_port *iport) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| u16 tag = iport->reserved_tag; |
| struct scu_task_context *tc; |
| u32 command; |
| |
| tc = &ihost->task_context_table[ISCI_TAG_TCI(tag)]; |
| tc->abort = 1; |
| |
| command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT | |
| iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | |
| ISCI_TAG_TCI(tag); |
| |
| sci_controller_post_request(ihost, command); |
| } |
| |
| /** |
| * |
| * @sci_port: This is the struct isci_port object to resume. |
| * |
| * This method will resume the port task scheduler for this port object. none |
| */ |
| static void |
| sci_port_resume_port_task_scheduler(struct isci_port *iport) |
| { |
| u32 pts_control_value; |
| |
| pts_control_value = readl(&iport->port_task_scheduler_registers->control); |
| pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND); |
| writel(pts_control_value, &iport->port_task_scheduler_registers->control); |
| } |
| |
| static void sci_port_ready_substate_waiting_enter(struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| |
| sci_port_suspend_port_task_scheduler(iport); |
| |
| iport->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS; |
| |
| if (iport->active_phy_mask != 0) { |
| /* At least one of the phys on the port is ready */ |
| port_state_machine_change(iport, |
| SCI_PORT_SUB_OPERATIONAL); |
| } |
| } |
| |
| static void scic_sds_port_ready_substate_waiting_exit( |
| struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| sci_port_resume_port_task_scheduler(iport); |
| } |
| |
| static void sci_port_ready_substate_operational_enter(struct sci_base_state_machine *sm) |
| { |
| u32 index; |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| struct isci_host *ihost = iport->owning_controller; |
| |
| 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]) { |
| writel(iport->physical_port_index, |
| &iport->port_pe_configuration_register[ |
| iport->phy_table[index]->phy_index]); |
| if (((iport->active_phy_mask^iport->enabled_phy_mask) & (1 << index)) != 0) |
| sci_port_resume_phy(iport, iport->phy_table[index]); |
| } |
| } |
| |
| sci_port_update_viit_entry(iport); |
| |
| /* |
| * Post the dummy task for the port so the hardware can schedule |
| * io correctly |
| */ |
| sci_port_post_dummy_request(iport); |
| } |
| |
| static void sci_port_invalidate_dummy_remote_node(struct isci_port *iport) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| u8 phys_index = iport->physical_port_index; |
| union scu_remote_node_context *rnc; |
| u16 rni = iport->reserved_rni; |
| u32 command; |
| |
| rnc = &ihost->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(&ihost->smu_registers->interrupt_status); /* flush */ |
| udelay(10); |
| |
| command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE | |
| phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; |
| |
| sci_controller_post_request(ihost, command); |
| } |
| |
| /** |
| * |
| * @object: This is the object which is cast to a struct isci_port object. |
| * |
| * This method will perform the actions required by the struct isci_port on |
| * exiting the SCI_PORT_SUB_OPERATIONAL. This function reports |
| * the port not ready and suspends the port task scheduler. none |
| */ |
| static void sci_port_ready_substate_operational_exit(struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| struct isci_host *ihost = iport->owning_controller; |
| |
| /* |
| * 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. |
| */ |
| sci_port_abort_dummy_request(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); |
| } |
| |
| static void sci_port_ready_substate_configuring_enter(struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| struct isci_host *ihost = iport->owning_controller; |
| |
| if (iport->active_phy_mask == 0) { |
| 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 |
| port_state_machine_change(iport, SCI_PORT_SUB_OPERATIONAL); |
| } |
| |
| enum sci_status sci_port_start(struct isci_port *iport) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| enum sci_status status = SCI_SUCCESS; |
| enum sci_port_states state; |
| u32 phy_mask; |
| |
| state = iport->sm.current_state_id; |
| if (state != SCI_PORT_STOPPED) { |
| dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", |
| __func__, port_state_name(state)); |
| return SCI_FAILURE_INVALID_STATE; |
| } |
| |
| if (iport->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; |
| } |
| |
| if (iport->reserved_rni == SCU_DUMMY_INDEX) { |
| u16 rni = sci_remote_node_table_allocate_remote_node( |
| &ihost->available_remote_nodes, 1); |
| |
| if (rni != SCU_DUMMY_INDEX) |
| sci_port_construct_dummy_rnc(iport, rni); |
| else |
| status = SCI_FAILURE_INSUFFICIENT_RESOURCES; |
| iport->reserved_rni = rni; |
| } |
| |
| if (iport->reserved_tag == SCI_CONTROLLER_INVALID_IO_TAG) { |
| u16 tag; |
| |
| tag = isci_alloc_tag(ihost); |
| if (tag == SCI_CONTROLLER_INVALID_IO_TAG) |
| status = SCI_FAILURE_INSUFFICIENT_RESOURCES; |
| else |
| sci_port_construct_dummy_task(iport, tag); |
| iport->reserved_tag = tag; |
| } |
| |
| if (status == SCI_SUCCESS) { |
| phy_mask = sci_port_get_phys(iport); |
| |
| /* |
| * 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 (sci_port_is_phy_mask_valid(iport, phy_mask) == true) { |
| port_state_machine_change(iport, |
| SCI_PORT_READY); |
| |
| return SCI_SUCCESS; |
| } |
| status = SCI_FAILURE; |
| } |
| |
| if (status != SCI_SUCCESS) |
| sci_port_destroy_dummy_resources(iport); |
| |
| return status; |
| } |
| |
| enum sci_status sci_port_stop(struct isci_port *iport) |
| { |
| enum sci_port_states state; |
| |
| state = iport->sm.current_state_id; |
| switch (state) { |
| case SCI_PORT_STOPPED: |
| return SCI_SUCCESS; |
| case SCI_PORT_SUB_WAITING: |
| case SCI_PORT_SUB_OPERATIONAL: |
| case SCI_PORT_SUB_CONFIGURING: |
| case SCI_PORT_RESETTING: |
| port_state_machine_change(iport, |
| SCI_PORT_STOPPING); |
| return SCI_SUCCESS; |
| default: |
| dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", |
| __func__, port_state_name(state)); |
| return SCI_FAILURE_INVALID_STATE; |
| } |
| } |
| |
| static enum sci_status sci_port_hard_reset(struct isci_port *iport, u32 timeout) |
| { |
| enum sci_status status = SCI_FAILURE_INVALID_PHY; |
| struct isci_phy *iphy = NULL; |
| enum sci_port_states state; |
| u32 phy_index; |
| |
| state = iport->sm.current_state_id; |
| if (state != SCI_PORT_SUB_OPERATIONAL) { |
| dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", |
| __func__, port_state_name(state)); |
| return SCI_FAILURE_INVALID_STATE; |
| } |
| |
| /* Select a phy on which we can send the hard reset request. */ |
| for (phy_index = 0; phy_index < SCI_MAX_PHYS && !iphy; phy_index++) { |
| iphy = iport->phy_table[phy_index]; |
| if (iphy && !sci_port_active_phy(iport, iphy)) { |
| /* |
| * We found a phy but it is not ready select |
| * different phy |
| */ |
| iphy = NULL; |
| } |
| } |
| |
| /* If we have a phy then go ahead and start the reset procedure */ |
| if (!iphy) |
| return status; |
| status = sci_phy_reset(iphy); |
| |
| if (status != SCI_SUCCESS) |
| return status; |
| |
| sci_mod_timer(&iport->timer, timeout); |
| iport->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED; |
| |
| port_state_machine_change(iport, SCI_PORT_RESETTING); |
| return SCI_SUCCESS; |
| } |
| |
| /** |
| * sci_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 a failure to add the phy to the port. |
| */ |
| enum sci_status sci_port_add_phy(struct isci_port *iport, |
| struct isci_phy *iphy) |
| { |
| enum sci_status status; |
| enum sci_port_states state; |
| |
| sci_port_bcn_enable(iport); |
| |
| state = iport->sm.current_state_id; |
| switch (state) { |
| case SCI_PORT_STOPPED: { |
| struct sci_sas_address port_sas_address; |
| |
| /* Read the port assigned SAS Address if there is one */ |
| sci_port_get_sas_address(iport, &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 |
| */ |
| sci_phy_get_sas_address(iphy, &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 sci_port_set_phy(iport, iphy); |
| } |
| case SCI_PORT_SUB_WAITING: |
| case SCI_PORT_SUB_OPERATIONAL: |
| status = sci_port_set_phy(iport, iphy); |
| |
| if (status != SCI_SUCCESS) |
| return status; |
| |
| sci_port_general_link_up_handler(iport, iphy, PF_NOTIFY|PF_RESUME); |
| iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; |
| port_state_machine_change(iport, SCI_PORT_SUB_CONFIGURING); |
| |
| return status; |
| case SCI_PORT_SUB_CONFIGURING: |
| status = sci_port_set_phy(iport, iphy); |
| |
| if (status != SCI_SUCCESS) |
| return status; |
| sci_port_general_link_up_handler(iport, iphy, PF_NOTIFY); |
| |
| /* Re-enter the configuring state since this may be the last phy in |
| * the port. |
| */ |
| port_state_machine_change(iport, |
| SCI_PORT_SUB_CONFIGURING); |
| return SCI_SUCCESS; |
| default: |
| dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", |
| __func__, port_state_name(state)); |
| return SCI_FAILURE_INVALID_STATE; |
| } |
| } |
| |
| /** |
| * sci_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 a failure to add the phy to the port. |
| */ |
| enum sci_status sci_port_remove_phy(struct isci_port *iport, |
| struct isci_phy *iphy) |
| { |
| enum sci_status status; |
| enum sci_port_states state; |
| |
| state = iport->sm.current_state_id; |
| |
| switch (state) { |
| case SCI_PORT_STOPPED: |
| return sci_port_clear_phy(iport, iphy); |
| case SCI_PORT_SUB_OPERATIONAL: |
| status = sci_port_clear_phy(iport, iphy); |
| if (status != SCI_SUCCESS) |
| return status; |
| |
| sci_port_deactivate_phy(iport, iphy, true); |
| iport->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; |
| port_state_machine_change(iport, |
| SCI_PORT_SUB_CONFIGURING); |
| return SCI_SUCCESS; |
| case SCI_PORT_SUB_CONFIGURING: |
| status = sci_port_clear_phy(iport, iphy); |
| |
| if (status != SCI_SUCCESS) |
| return status; |
| sci_port_deactivate_phy(iport, iphy, true); |
| |
| /* Re-enter the configuring state since this may be the last phy in |
| * the port |
| */ |
| port_state_machine_change(iport, |
| SCI_PORT_SUB_CONFIGURING); |
| return SCI_SUCCESS; |
| default: |
| dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", |
| __func__, port_state_name(state)); |
| return SCI_FAILURE_INVALID_STATE; |
| } |
| } |
| |
| enum sci_status sci_port_link_up(struct isci_port *iport, |
| struct isci_phy *iphy) |
| { |
| enum sci_port_states state; |
| |
| state = iport->sm.current_state_id; |
| switch (state) { |
| case SCI_PORT_SUB_WAITING: |
| /* Since this is the first phy going link up for the port we |
| * can just enable it and continue |
| */ |
| sci_port_activate_phy(iport, iphy, PF_NOTIFY|PF_RESUME); |
| |
| port_state_machine_change(iport, |
| SCI_PORT_SUB_OPERATIONAL); |
| return SCI_SUCCESS; |
| case SCI_PORT_SUB_OPERATIONAL: |
| sci_port_general_link_up_handler(iport, iphy, PF_NOTIFY|PF_RESUME); |
| return SCI_SUCCESS; |
| case SCI_PORT_RESETTING: |
| /* 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. |
| */ |
| sci_port_general_link_up_handler(iport, iphy, PF_RESUME); |
| return SCI_SUCCESS; |
| default: |
| dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", |
| __func__, port_state_name(state)); |
| return SCI_FAILURE_INVALID_STATE; |
| } |
| } |
| |
| enum sci_status sci_port_link_down(struct isci_port *iport, |
| struct isci_phy *iphy) |
| { |
| enum sci_port_states state; |
| |
| state = iport->sm.current_state_id; |
| switch (state) { |
| case SCI_PORT_SUB_OPERATIONAL: |
| sci_port_deactivate_phy(iport, iphy, 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 (iport->active_phy_mask == 0) |
| port_state_machine_change(iport, |
| SCI_PORT_SUB_WAITING); |
| return SCI_SUCCESS; |
| case SCI_PORT_RESETTING: |
| /* In the resetting state we don't notify the user regarding |
| * link up and link down notifications. */ |
| sci_port_deactivate_phy(iport, iphy, false); |
| return SCI_SUCCESS; |
| default: |
| dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", |
| __func__, port_state_name(state)); |
| return SCI_FAILURE_INVALID_STATE; |
| } |
| } |
| |
| enum sci_status sci_port_start_io(struct isci_port *iport, |
| struct isci_remote_device *idev, |
| struct isci_request *ireq) |
| { |
| enum sci_port_states state; |
| |
| state = iport->sm.current_state_id; |
| switch (state) { |
| case SCI_PORT_SUB_WAITING: |
| return SCI_FAILURE_INVALID_STATE; |
| case SCI_PORT_SUB_OPERATIONAL: |
| iport->started_request_count++; |
| return SCI_SUCCESS; |
| default: |
| dev_warn(sciport_to_dev(iport), "%s: in wrong state: %s\n", |
| __func__, port_state_name(state)); |
| return SCI_FAILURE_INVALID_STATE; |
| } |
| } |
| |
| enum sci_status sci_port_complete_io(struct isci_port *iport, |
| struct isci_remote_device *idev, |
| struct isci_request *ireq) |
| { |
| enum sci_port_states state; |
| |
| state = iport->sm.current_state_id; |
| switch (state) { |
| case SCI_PORT_STOPPED: |
| 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); |
| |
| if (iport->started_request_count == 0) |
| port_state_machine_change(iport, |
| SCI_PORT_STOPPED); |
| break; |
| case SCI_PORT_READY: |
| case SCI_PORT_RESETTING: |
| case SCI_PORT_FAILED: |
| case SCI_PORT_SUB_WAITING: |
| case SCI_PORT_SUB_OPERATIONAL: |
| sci_port_decrement_request_count(iport); |
| break; |
| case SCI_PORT_SUB_CONFIGURING: |
| sci_port_decrement_request_count(iport); |
| if (iport->started_request_count == 0) { |
| port_state_machine_change(iport, |
| SCI_PORT_SUB_OPERATIONAL); |
| } |
| break; |
| } |
| return SCI_SUCCESS; |
| } |
| |
| static void sci_port_enable_port_task_scheduler(struct isci_port *iport) |
| { |
| u32 pts_control_value; |
| |
| /* enable the port task scheduler in a suspended state */ |
| pts_control_value = readl(&iport->port_task_scheduler_registers->control); |
| pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND); |
| writel(pts_control_value, &iport->port_task_scheduler_registers->control); |
| } |
| |
| static void sci_port_disable_port_task_scheduler(struct isci_port *iport) |
| { |
| u32 pts_control_value; |
| |
| pts_control_value = readl(&iport->port_task_scheduler_registers->control); |
| pts_control_value &= |
| ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND)); |
| writel(pts_control_value, &iport->port_task_scheduler_registers->control); |
| } |
| |
| static void sci_port_post_dummy_remote_node(struct isci_port *iport) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| u8 phys_index = iport->physical_port_index; |
| union scu_remote_node_context *rnc; |
| u16 rni = iport->reserved_rni; |
| u32 command; |
| |
| rnc = &ihost->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; |
| |
| sci_controller_post_request(ihost, command); |
| |
| /* ensure hardware has seen the post rnc command and give it |
| * ample time to act before sending the suspend |
| */ |
| readl(&ihost->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; |
| |
| sci_controller_post_request(ihost, command); |
| } |
| |
| static void sci_port_stopped_state_enter(struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| |
| if (iport->sm.previous_state_id == SCI_PORT_STOPPING) { |
| /* |
| * If we enter this state becasuse of a request to stop |
| * the port then we want to disable the hardwares port |
| * task scheduler. */ |
| sci_port_disable_port_task_scheduler(iport); |
| } |
| } |
| |
| static void sci_port_stopped_state_exit(struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| |
| /* Enable and suspend the port task scheduler */ |
| sci_port_enable_port_task_scheduler(iport); |
| } |
| |
| static void sci_port_ready_state_enter(struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| struct isci_host *ihost = iport->owning_controller; |
| u32 prev_state; |
| |
| prev_state = iport->sm.previous_state_id; |
| if (prev_state == SCI_PORT_RESETTING) |
| isci_port_hard_reset_complete(iport, SCI_SUCCESS); |
| else |
| 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); |
| |
| /* Start the ready substate machine */ |
| port_state_machine_change(iport, |
| SCI_PORT_SUB_WAITING); |
| } |
| |
| static void sci_port_resetting_state_exit(struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| |
| sci_del_timer(&iport->timer); |
| } |
| |
| static void sci_port_stopping_state_exit(struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| |
| sci_del_timer(&iport->timer); |
| |
| sci_port_destroy_dummy_resources(iport); |
| } |
| |
| static void sci_port_failed_state_enter(struct sci_base_state_machine *sm) |
| { |
| struct isci_port *iport = container_of(sm, typeof(*iport), sm); |
| |
| isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); |
| } |
| |
| void sci_port_set_hang_detection_timeout(struct isci_port *iport, u32 timeout) |
| { |
| int phy_index; |
| u32 phy_mask = iport->active_phy_mask; |
| |
| if (timeout) |
| ++iport->hang_detect_users; |
| else if (iport->hang_detect_users > 1) |
| --iport->hang_detect_users; |
| else |
| iport->hang_detect_users = 0; |
| |
| if (timeout || (iport->hang_detect_users == 0)) { |
| for (phy_index = 0; phy_index < SCI_MAX_PHYS; phy_index++) { |
| if ((phy_mask >> phy_index) & 1) { |
| writel(timeout, |
| &iport->phy_table[phy_index] |
| ->link_layer_registers |
| ->link_layer_hang_detection_timeout); |
| } |
| } |
| } |
| } |
| /* --------------------------------------------------------------------------- */ |
| |
| static const struct sci_base_state sci_port_state_table[] = { |
| [SCI_PORT_STOPPED] = { |
| .enter_state = sci_port_stopped_state_enter, |
| .exit_state = sci_port_stopped_state_exit |
| }, |
| [SCI_PORT_STOPPING] = { |
| .exit_state = sci_port_stopping_state_exit |
| }, |
| [SCI_PORT_READY] = { |
| .enter_state = sci_port_ready_state_enter, |
| }, |
| [SCI_PORT_SUB_WAITING] = { |
| .enter_state = sci_port_ready_substate_waiting_enter, |
| .exit_state = scic_sds_port_ready_substate_waiting_exit, |
| }, |
| [SCI_PORT_SUB_OPERATIONAL] = { |
| .enter_state = sci_port_ready_substate_operational_enter, |
| .exit_state = sci_port_ready_substate_operational_exit |
| }, |
| [SCI_PORT_SUB_CONFIGURING] = { |
| .enter_state = sci_port_ready_substate_configuring_enter |
| }, |
| [SCI_PORT_RESETTING] = { |
| .exit_state = sci_port_resetting_state_exit |
| }, |
| [SCI_PORT_FAILED] = { |
| .enter_state = sci_port_failed_state_enter, |
| } |
| }; |
| |
| void sci_port_construct(struct isci_port *iport, u8 index, |
| struct isci_host *ihost) |
| { |
| sci_init_sm(&iport->sm, sci_port_state_table, SCI_PORT_STOPPED); |
| |
| iport->logical_port_index = SCIC_SDS_DUMMY_PORT; |
| iport->physical_port_index = index; |
| iport->active_phy_mask = 0; |
| iport->enabled_phy_mask = 0; |
| iport->last_active_phy = 0; |
| iport->ready_exit = false; |
| |
| iport->owning_controller = ihost; |
| |
| iport->started_request_count = 0; |
| iport->assigned_device_count = 0; |
| iport->hang_detect_users = 0; |
| |
| iport->reserved_rni = SCU_DUMMY_INDEX; |
| iport->reserved_tag = SCI_CONTROLLER_INVALID_IO_TAG; |
| |
| sci_init_timer(&iport->timer, port_timeout); |
| |
| iport->port_task_scheduler_registers = NULL; |
| |
| for (index = 0; index < SCI_MAX_PHYS; index++) |
| iport->phy_table[index] = NULL; |
| } |
| |
| void sci_port_broadcast_change_received(struct isci_port *iport, struct isci_phy *iphy) |
| { |
| struct isci_host *ihost = iport->owning_controller; |
| |
| /* notify the user. */ |
| 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) |
| { |
| unsigned long flags; |
| enum sci_status status; |
| int ret = TMF_RESP_FUNC_COMPLETE; |
| |
| dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n", |
| __func__, iport); |
| |
| 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); |
| |
| spin_unlock_irqrestore(&ihost->scic_lock, flags); |
| |
| if (status == SCI_SUCCESS) { |
| wait_port_reset(ihost, iport); |
| |
| dev_dbg(&ihost->pdev->dev, |
| "%s: iport = %p; hard reset completion\n", |
| __func__, iport); |
| |
| if (iport->hard_reset_status != SCI_SUCCESS) { |
| ret = TMF_RESP_FUNC_FAILED; |
| |
| dev_err(&ihost->pdev->dev, |
| "%s: iport = %p; hard reset failed (0x%x)\n", |
| __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, |
| "%s: iport = %p; sci_port_hard_reset call" |
| " failed 0x%x\n", |
| __func__, iport, status); |
| |
| } |
| return ret; |
| } |
| |
| 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) |
| { |
| 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])); |
| } |
| |
| void isci_port_formed(struct asd_sas_phy *phy) |
| { |
| 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 = NULL; |
| 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; |
| } |