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1771 lines
52 KiB
1771 lines
52 KiB
/* |
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* This file is provided under a dual BSD/GPLv2 license. When using or |
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* redistributing this file, you may do so under either license. |
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* |
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* GPL LICENSE SUMMARY |
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* |
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of version 2 of the GNU General Public License as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
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* The full GNU General Public License is included in this distribution |
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* in the file called LICENSE.GPL. |
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* |
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* BSD LICENSE |
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* |
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Intel Corporation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#include "isci.h" |
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#include "port.h" |
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#include "request.h" |
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#define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000) |
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#define SCU_DUMMY_INDEX (0xFFFF) |
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|
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#undef C |
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#define C(a) (#a) |
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const char *port_state_name(enum sci_port_states state) |
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{ |
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static const char * const strings[] = PORT_STATES; |
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return strings[state]; |
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} |
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#undef C |
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static struct device *sciport_to_dev(struct isci_port *iport) |
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{ |
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int i = iport->physical_port_index; |
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struct isci_port *table; |
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struct isci_host *ihost; |
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|
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if (i == SCIC_SDS_DUMMY_PORT) |
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i = SCI_MAX_PORTS+1; |
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table = iport - i; |
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ihost = container_of(table, typeof(*ihost), ports[0]); |
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return &ihost->pdev->dev; |
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} |
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|
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static void sci_port_get_protocols(struct isci_port *iport, struct sci_phy_proto *proto) |
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{ |
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u8 index; |
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proto->all = 0; |
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for (index = 0; index < SCI_MAX_PHYS; index++) { |
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struct isci_phy *iphy = iport->phy_table[index]; |
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|
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if (!iphy) |
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continue; |
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sci_phy_get_protocols(iphy, proto); |
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} |
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} |
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static u32 sci_port_get_phys(struct isci_port *iport) |
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{ |
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u32 index; |
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u32 mask; |
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mask = 0; |
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for (index = 0; index < SCI_MAX_PHYS; index++) |
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if (iport->phy_table[index]) |
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mask |= (1 << index); |
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return mask; |
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} |
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|
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/** |
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* sci_port_get_properties() - This method simply returns the properties |
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* regarding the port, such as: physical index, protocols, sas address, etc. |
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* @port: this parameter specifies the port for which to retrieve the physical |
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* index. |
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* @properties: This parameter specifies the properties structure into which to |
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* copy the requested information. |
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* |
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* Indicate if the user specified a valid port. SCI_SUCCESS This value is |
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* returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This |
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* value is returned if the specified port is not valid. When this value is |
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* returned, no data is copied to the properties output parameter. |
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*/ |
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enum sci_status sci_port_get_properties(struct isci_port *iport, |
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struct sci_port_properties *prop) |
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{ |
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if (!iport || iport->logical_port_index == SCIC_SDS_DUMMY_PORT) |
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return SCI_FAILURE_INVALID_PORT; |
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prop->index = iport->logical_port_index; |
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prop->phy_mask = sci_port_get_phys(iport); |
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sci_port_get_sas_address(iport, &prop->local.sas_address); |
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sci_port_get_protocols(iport, &prop->local.protocols); |
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sci_port_get_attached_sas_address(iport, &prop->remote.sas_address); |
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return SCI_SUCCESS; |
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} |
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static void sci_port_bcn_enable(struct isci_port *iport) |
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{ |
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struct isci_phy *iphy; |
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u32 val; |
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int i; |
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for (i = 0; i < ARRAY_SIZE(iport->phy_table); i++) { |
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iphy = iport->phy_table[i]; |
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if (!iphy) |
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continue; |
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val = readl(&iphy->link_layer_registers->link_layer_control); |
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/* clear the bit by writing 1. */ |
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writel(val, &iphy->link_layer_registers->link_layer_control); |
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} |
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} |
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static void isci_port_bc_change_received(struct isci_host *ihost, |
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struct isci_port *iport, |
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struct isci_phy *iphy) |
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{ |
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dev_dbg(&ihost->pdev->dev, |
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"%s: isci_phy = %p, sas_phy = %p\n", |
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__func__, iphy, &iphy->sas_phy); |
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sas_notify_port_event(&iphy->sas_phy, |
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PORTE_BROADCAST_RCVD, GFP_ATOMIC); |
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sci_port_bcn_enable(iport); |
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} |
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static void isci_port_link_up(struct isci_host *isci_host, |
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struct isci_port *iport, |
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struct isci_phy *iphy) |
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{ |
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unsigned long flags; |
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struct sci_port_properties properties; |
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unsigned long success = true; |
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dev_dbg(&isci_host->pdev->dev, |
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"%s: isci_port = %p\n", |
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__func__, iport); |
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spin_lock_irqsave(&iphy->sas_phy.frame_rcvd_lock, flags); |
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sci_port_get_properties(iport, &properties); |
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if (iphy->protocol == SAS_PROTOCOL_SATA) { |
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u64 attached_sas_address; |
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iphy->sas_phy.oob_mode = SATA_OOB_MODE; |
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iphy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis); |
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/* |
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* For direct-attached SATA devices, the SCI core will |
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* automagically assign a SAS address to the end device |
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* for the purpose of creating a port. This SAS address |
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* will not be the same as assigned to the PHY and needs |
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* to be obtained from struct sci_port_properties properties. |
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*/ |
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attached_sas_address = properties.remote.sas_address.high; |
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attached_sas_address <<= 32; |
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attached_sas_address |= properties.remote.sas_address.low; |
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swab64s(&attached_sas_address); |
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memcpy(&iphy->sas_phy.attached_sas_addr, |
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&attached_sas_address, sizeof(attached_sas_address)); |
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} else if (iphy->protocol == SAS_PROTOCOL_SSP) { |
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iphy->sas_phy.oob_mode = SAS_OOB_MODE; |
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iphy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame); |
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|
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/* Copy the attached SAS address from the IAF */ |
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memcpy(iphy->sas_phy.attached_sas_addr, |
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iphy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE); |
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} else { |
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dev_err(&isci_host->pdev->dev, "%s: unknown target\n", __func__); |
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success = false; |
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} |
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iphy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(iphy); |
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spin_unlock_irqrestore(&iphy->sas_phy.frame_rcvd_lock, flags); |
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|
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/* Notify libsas that we have an address frame, if indeed |
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* we've found an SSP, SMP, or STP target */ |
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if (success) |
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sas_notify_port_event(&iphy->sas_phy, |
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PORTE_BYTES_DMAED, GFP_ATOMIC); |
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} |
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/** |
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* isci_port_link_down() - This function is called by the sci core when a link |
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* becomes inactive. |
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* @isci_host: This parameter specifies the isci host object. |
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* @phy: This parameter specifies the isci phy with the active link. |
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* @port: This parameter specifies the isci port with the active link. |
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* |
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*/ |
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static void isci_port_link_down(struct isci_host *isci_host, |
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struct isci_phy *isci_phy, |
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struct isci_port *isci_port) |
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{ |
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struct isci_remote_device *isci_device; |
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dev_dbg(&isci_host->pdev->dev, |
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"%s: isci_port = %p\n", __func__, isci_port); |
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if (isci_port) { |
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|
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/* check to see if this is the last phy on this port. */ |
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if (isci_phy->sas_phy.port && |
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isci_phy->sas_phy.port->num_phys == 1) { |
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/* change the state for all devices on this port. The |
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* next task sent to this device will be returned as |
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* SAS_TASK_UNDELIVERED, and the scsi mid layer will |
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* remove the target |
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*/ |
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list_for_each_entry(isci_device, |
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&isci_port->remote_dev_list, |
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node) { |
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dev_dbg(&isci_host->pdev->dev, |
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"%s: isci_device = %p\n", |
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__func__, isci_device); |
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set_bit(IDEV_GONE, &isci_device->flags); |
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} |
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} |
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} |
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/* Notify libsas of the borken link, this will trigger calls to our |
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* isci_port_deformed and isci_dev_gone functions. |
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*/ |
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sas_phy_disconnected(&isci_phy->sas_phy); |
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sas_notify_phy_event(&isci_phy->sas_phy, |
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PHYE_LOSS_OF_SIGNAL, GFP_ATOMIC); |
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dev_dbg(&isci_host->pdev->dev, |
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"%s: isci_port = %p - Done\n", __func__, isci_port); |
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} |
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static bool is_port_ready_state(enum sci_port_states state) |
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{ |
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switch (state) { |
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case SCI_PORT_READY: |
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case SCI_PORT_SUB_WAITING: |
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case SCI_PORT_SUB_OPERATIONAL: |
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case SCI_PORT_SUB_CONFIGURING: |
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return true; |
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default: |
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return false; |
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} |
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} |
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/* flag dummy rnc hanling when exiting a ready state */ |
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static void port_state_machine_change(struct isci_port *iport, |
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enum sci_port_states state) |
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{ |
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struct sci_base_state_machine *sm = &iport->sm; |
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enum sci_port_states old_state = sm->current_state_id; |
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if (is_port_ready_state(old_state) && !is_port_ready_state(state)) |
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iport->ready_exit = true; |
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sci_change_state(sm, state); |
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iport->ready_exit = false; |
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} |
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/** |
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* isci_port_hard_reset_complete() - This function is called by the sci core |
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* when the hard reset complete notification has been received. |
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* @port: This parameter specifies the sci port with the active link. |
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* @completion_status: This parameter specifies the core status for the reset |
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* process. |
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* |
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*/ |
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static void isci_port_hard_reset_complete(struct isci_port *isci_port, |
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enum sci_status completion_status) |
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{ |
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struct isci_host *ihost = isci_port->owning_controller; |
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dev_dbg(&ihost->pdev->dev, |
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"%s: isci_port = %p, completion_status=%x\n", |
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__func__, isci_port, completion_status); |
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/* Save the status of the hard reset from the port. */ |
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isci_port->hard_reset_status = completion_status; |
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if (completion_status != SCI_SUCCESS) { |
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/* The reset failed. The port state is now SCI_PORT_FAILED. */ |
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if (isci_port->active_phy_mask == 0) { |
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int phy_idx = isci_port->last_active_phy; |
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struct isci_phy *iphy = &ihost->phys[phy_idx]; |
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|
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/* Generate the link down now to the host, since it |
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* was intercepted by the hard reset state machine when |
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* it really happened. |
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*/ |
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isci_port_link_down(ihost, iphy, isci_port); |
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} |
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/* Advance the port state so that link state changes will be |
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* noticed. |
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*/ |
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port_state_machine_change(isci_port, SCI_PORT_SUB_WAITING); |
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} |
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clear_bit(IPORT_RESET_PENDING, &isci_port->state); |
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wake_up(&ihost->eventq); |
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} |
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/* This method will return a true value if the specified phy can be assigned to |
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* this port The following is a list of phys for each port that are allowed: - |
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* Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method |
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* doesn't preclude all configurations. It merely ensures that a phy is part |
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* of the allowable set of phy identifiers for that port. For example, one |
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* could assign phy 3 to port 0 and no other phys. Please refer to |
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* sci_port_is_phy_mask_valid() for information regarding whether the |
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* phy_mask for a port can be supported. bool true if this is a valid phy |
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* assignment for the port false if this is not a valid phy assignment for the |
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* port |
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*/ |
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bool sci_port_is_valid_phy_assignment(struct isci_port *iport, u32 phy_index) |
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{ |
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struct isci_host *ihost = iport->owning_controller; |
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struct sci_user_parameters *user = &ihost->user_parameters; |
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|
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/* Initialize to invalid value. */ |
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u32 existing_phy_index = SCI_MAX_PHYS; |
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u32 index; |
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if ((iport->physical_port_index == 1) && (phy_index != 1)) |
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return false; |
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if (iport->physical_port_index == 3 && phy_index != 3) |
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return false; |
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if (iport->physical_port_index == 2 && |
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(phy_index == 0 || phy_index == 1)) |
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return false; |
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for (index = 0; index < SCI_MAX_PHYS; index++) |
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if (iport->phy_table[index] && index != phy_index) |
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existing_phy_index = index; |
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|
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/* Ensure that all of the phys in the port are capable of |
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* operating at the same maximum link rate. |
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*/ |
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if (existing_phy_index < SCI_MAX_PHYS && |
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user->phys[phy_index].max_speed_generation != |
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user->phys[existing_phy_index].max_speed_generation) |
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return false; |
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|
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return true; |
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} |
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|
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/** |
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* |
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* @sci_port: This is the port object for which to determine if the phy mask |
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* can be supported. |
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* |
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* This method will return a true value if the port's phy mask can be supported |
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* by the SCU. The following is a list of valid PHY mask configurations for |
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* each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2] |
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* - Port 3 - [3] This method returns a boolean indication specifying if the |
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* phy mask can be supported. true if this is a valid phy assignment for the |
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* port false if this is not a valid phy assignment for the port |
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*/ |
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static bool sci_port_is_phy_mask_valid( |
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struct isci_port *iport, |
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u32 phy_mask) |
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{ |
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if (iport->physical_port_index == 0) { |
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if (((phy_mask & 0x0F) == 0x0F) |
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|| ((phy_mask & 0x03) == 0x03) |
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|| ((phy_mask & 0x01) == 0x01) |
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|| (phy_mask == 0)) |
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return true; |
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} else if (iport->physical_port_index == 1) { |
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if (((phy_mask & 0x02) == 0x02) |
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|| (phy_mask == 0)) |
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return true; |
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} else if (iport->physical_port_index == 2) { |
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if (((phy_mask & 0x0C) == 0x0C) |
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|| ((phy_mask & 0x04) == 0x04) |
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|| (phy_mask == 0)) |
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return true; |
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} else if (iport->physical_port_index == 3) { |
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if (((phy_mask & 0x08) == 0x08) |
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|| (phy_mask == 0)) |
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return true; |
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} |
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|
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return false; |
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} |
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|
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/* |
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* This method retrieves a currently active (i.e. connected) phy contained in |
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* the port. Currently, the lowest order phy that is connected is returned. |
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* This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is |
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* returned if there are no currently active (i.e. connected to a remote end |
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* point) phys contained in the port. All other values specify a struct sci_phy |
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* object that is active in the port. |
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*/ |
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static struct isci_phy *sci_port_get_a_connected_phy(struct isci_port *iport) |
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{ |
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u32 index; |
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struct isci_phy *iphy; |
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|
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for (index = 0; index < SCI_MAX_PHYS; index++) { |
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/* Ensure that the phy is both part of the port and currently |
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* connected to the remote end-point. |
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*/ |
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iphy = iport->phy_table[index]; |
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if (iphy && sci_port_active_phy(iport, iphy)) |
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return iphy; |
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} |
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|
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return NULL; |
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} |
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|
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static enum sci_status sci_port_set_phy(struct isci_port *iport, struct isci_phy *iphy) |
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{ |
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/* Check to see if we can add this phy to a port |
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* that means that the phy is not part of a port and that the port does |
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* not already have a phy assinged to the phy index. |
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*/ |
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if (!iport->phy_table[iphy->phy_index] && |
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!phy_get_non_dummy_port(iphy) && |
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sci_port_is_valid_phy_assignment(iport, iphy->phy_index)) { |
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/* Phy is being added in the stopped state so we are in MPC mode |
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* make logical port index = physical port index |
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*/ |
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iport->logical_port_index = iport->physical_port_index; |
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iport->phy_table[iphy->phy_index] = iphy; |
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sci_phy_set_port(iphy, iport); |
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|
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return SCI_SUCCESS; |
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} |
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|
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return SCI_FAILURE; |
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} |
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|
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static enum sci_status sci_port_clear_phy(struct isci_port *iport, struct isci_phy *iphy) |
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{ |
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/* Make sure that this phy is part of this port */ |
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if (iport->phy_table[iphy->phy_index] == iphy && |
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phy_get_non_dummy_port(iphy) == iport) { |
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struct isci_host *ihost = iport->owning_controller; |
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|
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/* Yep it is assigned to this port so remove it */ |
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sci_phy_set_port(iphy, &ihost->ports[SCI_MAX_PORTS]); |
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iport->phy_table[iphy->phy_index] = NULL; |
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return SCI_SUCCESS; |
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} |
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|
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return SCI_FAILURE; |
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} |
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|
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void sci_port_get_sas_address(struct isci_port *iport, struct sci_sas_address *sas) |
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{ |
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u32 index; |
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|
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sas->high = 0; |
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sas->low = 0; |
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for (index = 0; index < SCI_MAX_PHYS; index++) |
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if (iport->phy_table[index]) |
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sci_phy_get_sas_address(iport->phy_table[index], sas); |
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} |
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|
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void sci_port_get_attached_sas_address(struct isci_port *iport, struct sci_sas_address *sas) |
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{ |
|
struct isci_phy *iphy; |
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|
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/* |
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* Ensure that the phy is both part of the port and currently |
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* connected to the remote end-point. |
|
*/ |
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iphy = sci_port_get_a_connected_phy(iport); |
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if (iphy) { |
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if (iphy->protocol != SAS_PROTOCOL_SATA) { |
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sci_phy_get_attached_sas_address(iphy, sas); |
|
} else { |
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sci_phy_get_sas_address(iphy, sas); |
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sas->low += iphy->phy_index; |
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} |
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} 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(struct timer_list *t) |
|
{ |
|
struct sci_timer *tmr = from_timer(tmr, t, timer); |
|
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 timeout.\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; |
|
}
|
|
|