/*
* 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.
*/
/**
* This file contains the isci port implementation.
*
*
*/
#include <linux/workqueue.h>
#include "isci.h"
#include "scic_io_request.h"
#include "scic_phy.h"
#include "scic_sds_phy.h"
#include "scic_port.h"
#include "port.h"
#include "request.h"
#include "core/scic_sds_controller.h"
static void isci_port_change_state(struct isci_port *iport, enum isci_status status)
{
unsigned long flags;
dev_dbg(&iport->isci_host->pdev->dev,
"%s: iport = %p, state = 0x%x\n",
__func__, iport, status);
/* XXX pointless lock */
spin_lock_irqsave(&iport->state_lock, flags);
iport->status = status;
spin_unlock_irqrestore(&iport->state_lock, flags);
}
void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
{
INIT_LIST_HEAD(&iport->remote_dev_list);
INIT_LIST_HEAD(&iport->domain_dev_list);
spin_lock_init(&iport->state_lock);
init_completion(&iport->start_complete);
iport->isci_host = ihost;
isci_port_change_state(iport, isci_freed);
}
/**
* isci_port_get_state() - This function gets the status of the port object.
* @isci_port: This parameter points to the isci_port object
*
* status of the object as a isci_status enum.
*/
enum isci_status isci_port_get_state(
struct isci_port *isci_port)
{
return isci_port->status;
}
void isci_port_bc_change_received(struct isci_host *ihost,
struct scic_sds_port *sci_port,
struct scic_sds_phy *sci_phy)
{
struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n",
__func__, iphy, &iphy->sas_phy);
ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD);
scic_port_enable_broadcast_change_notification(sci_port);
}
void isci_port_link_up(struct isci_host *isci_host,
struct scic_sds_port *port,
struct scic_sds_phy *phy)
{
unsigned long flags;
struct scic_port_properties properties;
struct isci_phy *isci_phy = sci_phy_to_iphy(phy);
struct isci_port *isci_port = sci_port_to_iport(port);
unsigned long success = true;
BUG_ON(isci_phy->isci_port != NULL);
isci_phy->isci_port = isci_port;
dev_dbg(&isci_host->pdev->dev,
"%s: isci_port = %p\n",
__func__, isci_port);
spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
isci_port_change_state(isci_phy->isci_port, isci_starting);
scic_port_get_properties(port, &properties);
if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) {
u64 attached_sas_address;
isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
isci_phy->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 scic_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(&isci_phy->sas_phy.attached_sas_addr,
&attached_sas_address, sizeof(attached_sas_address));
} else if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame);
/* Copy the attached SAS address from the IAF */
memcpy(isci_phy->sas_phy.attached_sas_addr,
isci_phy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE);
} else {
dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
success = false;
}
isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
spin_unlock_irqrestore(&isci_phy->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(&isci_phy->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.
*
*/
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);
isci_remote_device_change_state(isci_device,
isci_stopping);
}
}
isci_port_change_state(isci_port, isci_stopping);
}
/* 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);
isci_phy->isci_port = NULL;
dev_dbg(&isci_host->pdev->dev,
"%s: isci_port = %p - Done\n", __func__, isci_port);
}
/**
* isci_port_deformed() - This function is called by libsas when a port becomes
* inactive.
* @phy: This parameter specifies the libsas phy with the inactive port.
*
*/
void isci_port_deformed(
struct asd_sas_phy *phy)
{
pr_debug("%s: sas_phy = %p\n", __func__, phy);
}
/**
* isci_port_formed() - This function is called by libsas when a port becomes
* active.
* @phy: This parameter specifies the libsas phy with the active port.
*
*/
void isci_port_formed(
struct asd_sas_phy *phy)
{
pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
}
/**
* isci_port_ready() - This function is called by the sci core when a link
* becomes ready.
* @isci_host: This parameter specifies the isci host object.
* @port: This parameter specifies the sci port with the active link.
*
*/
void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
{
dev_dbg(&isci_host->pdev->dev,
"%s: isci_port = %p\n", __func__, isci_port);
complete_all(&isci_port->start_complete);
isci_port_change_state(isci_port, isci_ready);
return;
}
/**
* isci_port_not_ready() - This function is called by the sci core when a link
* is not ready. All remote devices on this link will be removed if they are
* in the stopping state.
* @isci_host: This parameter specifies the isci host object.
* @port: This parameter specifies the sci port with the active link.
*
*/
void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
{
dev_dbg(&isci_host->pdev->dev,
"%s: isci_port = %p\n", __func__, isci_port);
}
/**
* 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.
*
*/
void isci_port_hard_reset_complete(struct isci_port *isci_port,
enum sci_status completion_status)
{
dev_dbg(&isci_port->isci_host->pdev->dev,
"%s: isci_port = %p, completion_status=%x\n",
__func__, isci_port, completion_status);
/* Save the status of the hard reset from the port. */
isci_port->hard_reset_status = completion_status;
complete_all(&isci_port->hard_reset_complete);
}
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);
init_completion(&iport->hard_reset_complete);
spin_lock_irqsave(&ihost->scic_lock, flags);
#define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
status = scic_port_hard_reset(&iport->sci, ISCI_PORT_RESET_TIMEOUT);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
if (status == SCI_SUCCESS) {
wait_for_completion(&iport->hard_reset_complete);
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;
} else {
ret = TMF_RESP_FUNC_FAILED;
dev_err(&ihost->pdev->dev,
"%s: iport = %p; scic_port_hard_reset call"
" failed 0x%x\n",
__func__, iport, status);
}
/* If the hard reset for the port has failed, consider this
* the same as link failures on all phys in the port.
*/
if (ret != TMF_RESP_FUNC_COMPLETE) {
dev_err(&ihost->pdev->dev,
"%s: iport = %p; hard reset failed "
"(0x%x) - sending link down to libsas for phy %p\n",
__func__, iport, iport->hard_reset_status, iphy);
isci_port_link_down(ihost, iphy, iport);
}
return ret;
}
void isci_port_stop_complete(struct scic_sds_controller *scic,
struct scic_sds_port *sci_port,
enum sci_status completion_status)
{
dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");
}
