Orange Pi5 kernel

/*
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * BSD LICENSE
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <linux/completion.h>
#include <linux/irqflags.h>
#include "sas.h"
#include <scsi/libsas.h>
#include "remote_device.h"
#include "remote_node_context.h"
#include "isci.h"
#include "request.h"
#include "task.h"
#include "host.h"
 
/**
* isci_task_refuse() - complete the request to the upper layer driver in
*     the case where an I/O needs to be completed back in the submit path.
* @ihost: host on which the the request was queued
* @task: request to complete
* @response: response code for the completed task.
* @status: status code for the completed task.
*
*/
static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task,
<------><------><------>     enum service_response response,
<------><------><------>     enum exec_status status)
 
{
<------>unsigned long flags;
 
<------>/* Normal notification (task_done) */
<------>dev_dbg(&ihost->pdev->dev, "%s: task = %p, response=%d, status=%d\n",
<------><------>__func__, task, response, status);
 
<------>spin_lock_irqsave(&task->task_state_lock, flags);
 
<------>task->task_status.resp = response;
<------>task->task_status.stat = status;
 
<------>/* Normal notification (task_done) */
<------>task->task_state_flags |= SAS_TASK_STATE_DONE;
<------>task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
<------><------><------><------>    SAS_TASK_STATE_PENDING);
<------>task->lldd_task = NULL;
<------>spin_unlock_irqrestore(&task->task_state_lock, flags);
 
<------>task->task_done(task);
}
 
#define for_each_sas_task(num, task) \
<------>for (; num > 0; num--,\
<------>     task = list_entry(task->list.next, struct sas_task, list))
 
 
static inline int isci_device_io_ready(struct isci_remote_device *idev,
<------><------><------><------>       struct sas_task *task)
{
<------>return idev ? test_bit(IDEV_IO_READY, &idev->flags) ||
<------><------>      (test_bit(IDEV_IO_NCQERROR, &idev->flags) &&
<------><------>       isci_task_is_ncq_recovery(task))
<------><------>    : 0;
}
/**
 * isci_task_execute_task() - This function is one of the SAS Domain Template
 *    functions. This function is called by libsas to send a task down to
 *    hardware.
 * @task: This parameter specifies the SAS task to send.
 * @gfp_flags: This parameter specifies the context of this call.
 *
 * status, zero indicates success.
 */
int isci_task_execute_task(struct sas_task *task, gfp_t gfp_flags)
{
<------>struct isci_host *ihost = dev_to_ihost(task->dev);
<------>struct isci_remote_device *idev;
<------>unsigned long flags;
<------>enum sci_status status = SCI_FAILURE;
<------>bool io_ready;
<------>u16 tag;
 
<------>spin_lock_irqsave(&ihost->scic_lock, flags);
<------>idev = isci_lookup_device(task->dev);
<------>io_ready = isci_device_io_ready(idev, task);
<------>tag = isci_alloc_tag(ihost);
<------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
<------>dev_dbg(&ihost->pdev->dev,
<------><------>"task: %p, dev: %p idev: %p:%#lx cmd = %p\n",
<------><------>task, task->dev, idev, idev ? idev->flags : 0,
<------><------>task->uldd_task);
 
<------>if (!idev) {
<------><------>isci_task_refuse(ihost, task, SAS_TASK_UNDELIVERED,
<------><------><------><------> SAS_DEVICE_UNKNOWN);
<------>} else if (!io_ready || tag == SCI_CONTROLLER_INVALID_IO_TAG) {
<------><------>/* Indicate QUEUE_FULL so that the scsi midlayer
<------><------> * retries.
<------><------>  */
<------><------>isci_task_refuse(ihost, task, SAS_TASK_COMPLETE,
<------><------><------><------> SAS_QUEUE_FULL);
<------>} else {
<------><------>/* There is a device and it's ready for I/O. */
<------><------>spin_lock_irqsave(&task->task_state_lock, flags);
 
<------><------>if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
<------><------><------>/* The I/O was aborted. */
<------><------><------>spin_unlock_irqrestore(&task->task_state_lock, flags);
 
<------><------><------>isci_task_refuse(ihost, task,
<------><------><------><------><------> SAS_TASK_UNDELIVERED,
<------><------><------><------><------> SAM_STAT_TASK_ABORTED);
<------><------>} else {
<------><------><------>task->task_state_flags |= SAS_TASK_AT_INITIATOR;
<------><------><------>spin_unlock_irqrestore(&task->task_state_lock, flags);
 
<------><------><------>/* build and send the request. */
<------><------><------>status = isci_request_execute(ihost, idev, task, tag);
 
<------><------><------>if (status != SCI_SUCCESS) {
<------><------><------><------>spin_lock_irqsave(&task->task_state_lock, flags);
<------><------><------><------>/* Did not really start this command. */
<------><------><------><------>task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
<------><------><------><------>spin_unlock_irqrestore(&task->task_state_lock, flags);
 
<------><------><------><------>if (test_bit(IDEV_GONE, &idev->flags)) {
<------><------><------><------><------>/* Indicate that the device
<------><------><------><------><------> * is gone.
<------><------><------><------><------> */
<------><------><------><------><------>isci_task_refuse(ihost, task,
<------><------><------><------><------><------>SAS_TASK_UNDELIVERED,
<------><------><------><------><------><------>SAS_DEVICE_UNKNOWN);
<------><------><------><------>} else {
<------><------><------><------><------>/* Indicate QUEUE_FULL so that
<------><------><------><------><------> * the scsi midlayer retries.
<------><------><------><------><------> * If the request failed for
<------><------><------><------><------> * remote device reasons, it
<------><------><------><------><------> * gets returned as
<------><------><------><------><------> * SAS_TASK_UNDELIVERED next
<------><------><------><------><------> * time through.
<------><------><------><------><------> */
<------><------><------><------><------>isci_task_refuse(ihost, task,
<------><------><------><------><------><------>SAS_TASK_COMPLETE,
<------><------><------><------><------><------>SAS_QUEUE_FULL);
<------><------><------><------>}
<------><------><------>}
<------><------>}
<------>}
 
<------>if (status != SCI_SUCCESS && tag != SCI_CONTROLLER_INVALID_IO_TAG) {
<------><------>spin_lock_irqsave(&ihost->scic_lock, flags);
<------><------>/* command never hit the device, so just free
<------><------> * the tci and skip the sequence increment
<------><------> */
<------><------>isci_tci_free(ihost, ISCI_TAG_TCI(tag));
<------><------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
<------>}
 
<------>isci_put_device(idev);
<------>return 0;
}
 
static struct isci_request *isci_task_request_build(struct isci_host *ihost,
<------><------><------><------><------><------>    struct isci_remote_device *idev,
<------><------><------><------><------><------>    u16 tag, struct isci_tmf *isci_tmf)
{
<------>enum sci_status status = SCI_FAILURE;
<------>struct isci_request *ireq = NULL;
<------>struct domain_device *dev;
 
<------>dev_dbg(&ihost->pdev->dev,
<------><------>"%s: isci_tmf = %p\n", __func__, isci_tmf);
 
<------>dev = idev->domain_dev;
 
<------>/* do common allocation and init of request object. */
<------>ireq = isci_tmf_request_from_tag(ihost, isci_tmf, tag);
<------>if (!ireq)
<------><------>return NULL;
 
<------>/* let the core do it's construct. */
<------>status = sci_task_request_construct(ihost, idev, tag,
<------><------><------><------><------>     ireq);
 
<------>if (status != SCI_SUCCESS) {
<------><------>dev_warn(&ihost->pdev->dev,
<------><------><------> "%s: sci_task_request_construct failed - "
<------><------><------> "status = 0x%x\n",
<------><------><------> __func__,
<------><------><------> status);
<------><------>return NULL;
<------>}
 
<------>/* XXX convert to get this from task->tproto like other drivers */
<------>if (dev->dev_type == SAS_END_DEVICE) {
<------><------>isci_tmf->proto = SAS_PROTOCOL_SSP;
<------><------>status = sci_task_request_construct_ssp(ireq);
<------><------>if (status != SCI_SUCCESS)
<------><------><------>return NULL;
<------>}
 
<------>return ireq;
}
 
static int isci_task_execute_tmf(struct isci_host *ihost,
<------><------><------><------> struct isci_remote_device *idev,
<------><------><------><------> struct isci_tmf *tmf, unsigned long timeout_ms)
{
<------>DECLARE_COMPLETION_ONSTACK(completion);
<------>enum sci_status status = SCI_FAILURE;
<------>struct isci_request *ireq;
<------>int ret = TMF_RESP_FUNC_FAILED;
<------>unsigned long flags;
<------>unsigned long timeleft;
<------>u16 tag;
 
<------>spin_lock_irqsave(&ihost->scic_lock, flags);
<------>tag = isci_alloc_tag(ihost);
<------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
<------>if (tag == SCI_CONTROLLER_INVALID_IO_TAG)
<------><------>return ret;
 
<------>/* sanity check, return TMF_RESP_FUNC_FAILED
<------> * if the device is not there and ready.
<------> */
<------>if (!idev ||
<------>    (!test_bit(IDEV_IO_READY, &idev->flags) &&
<------>     !test_bit(IDEV_IO_NCQERROR, &idev->flags))) {
<------><------>dev_dbg(&ihost->pdev->dev,
<------><------><------>"%s: idev = %p not ready (%#lx)\n",
<------><------><------>__func__,
<------><------><------>idev, idev ? idev->flags : 0);
<------><------>goto err_tci;
<------>} else
<------><------>dev_dbg(&ihost->pdev->dev,
<------><------><------>"%s: idev = %p\n",
<------><------><------>__func__, idev);
 
<------>/* Assign the pointer to the TMF's completion kernel wait structure. */
<------>tmf->complete = &completion;
<------>tmf->status = SCI_FAILURE_TIMEOUT;
 
<------>ireq = isci_task_request_build(ihost, idev, tag, tmf);
<------>if (!ireq)
<------><------>goto err_tci;
 
<------>spin_lock_irqsave(&ihost->scic_lock, flags);
 
<------>/* start the TMF io. */
<------>status = sci_controller_start_task(ihost, idev, ireq);
 
<------>if (status != SCI_SUCCESS) {
<------><------>dev_dbg(&ihost->pdev->dev,
<------><------><------> "%s: start_io failed - status = 0x%x, request = %p\n",
<------><------><------> __func__,
<------><------><------> status,
<------><------><------> ireq);
<------><------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
<------><------>goto err_tci;
<------>}
<------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
<------>/* The RNC must be unsuspended before the TMF can get a response. */
<------>isci_remote_device_resume_from_abort(ihost, idev);
 
<------>/* Wait for the TMF to complete, or a timeout. */
<------>timeleft = wait_for_completion_timeout(&completion,
<------><------><------><------><------>       msecs_to_jiffies(timeout_ms));
 
<------>if (timeleft == 0) {
<------><------>/* The TMF did not complete - this could be because
<------><------> * of an unplug.  Terminate the TMF request now.
<------><------> */
<------><------>isci_remote_device_suspend_terminate(ihost, idev, ireq);
<------>}
 
<------>isci_print_tmf(ihost, tmf);
 
<------>if (tmf->status == SCI_SUCCESS)
<------><------>ret =  TMF_RESP_FUNC_COMPLETE;
<------>else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) {
<------><------>dev_dbg(&ihost->pdev->dev,
<------><------><------>"%s: tmf.status == "
<------><------><------>"SCI_FAILURE_IO_RESPONSE_VALID\n",
<------><------><------>__func__);
<------><------>ret =  TMF_RESP_FUNC_COMPLETE;
<------>}
<------>/* Else - leave the default "failed" status alone. */
 
<------>dev_dbg(&ihost->pdev->dev,
<------><------>"%s: completed request = %p\n",
<------><------>__func__,
<------><------>ireq);
 
<------>return ret;
 
 err_tci:
<------>spin_lock_irqsave(&ihost->scic_lock, flags);
<------>isci_tci_free(ihost, ISCI_TAG_TCI(tag));
<------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
<------>return ret;
}
 
static void isci_task_build_tmf(struct isci_tmf *tmf,
<------><------><------><------>enum isci_tmf_function_codes code)
{
<------>memset(tmf, 0, sizeof(*tmf));
<------>tmf->tmf_code = code;
}
 
static void isci_task_build_abort_task_tmf(struct isci_tmf *tmf,
<------><------><------><------><------>   enum isci_tmf_function_codes code,
<------><------><------><------><------>   struct isci_request *old_request)
{
<------>isci_task_build_tmf(tmf, code);
<------>tmf->io_tag = old_request->io_tag;
}
 
/**
 * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain
 *    Template functions.
 * @lun: This parameter specifies the lun to be reset.
 *
 * status, zero indicates success.
 */
static int isci_task_send_lu_reset_sas(
<------>struct isci_host *isci_host,
<------>struct isci_remote_device *isci_device,
<------>u8 *lun)
{
<------>struct isci_tmf tmf;
<------>int ret = TMF_RESP_FUNC_FAILED;
 
<------>dev_dbg(&isci_host->pdev->dev,
<------><------>"%s: isci_host = %p, isci_device = %p\n",
<------><------>__func__, isci_host, isci_device);
<------>/* Send the LUN reset to the target.  By the time the call returns,
<------> * the TMF has fully exected in the target (in which case the return
<------> * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or
<------> * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED").
<------> */
<------>isci_task_build_tmf(&tmf, isci_tmf_ssp_lun_reset);
 
<------>#define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */
<------>ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, ISCI_LU_RESET_TIMEOUT_MS);
 
<------>if (ret == TMF_RESP_FUNC_COMPLETE)
<------><------>dev_dbg(&isci_host->pdev->dev,
<------><------><------>"%s: %p: TMF_LU_RESET passed\n",
<------><------><------>__func__, isci_device);
<------>else
<------><------>dev_dbg(&isci_host->pdev->dev,
<------><------><------>"%s: %p: TMF_LU_RESET failed (%x)\n",
<------><------><------>__func__, isci_device, ret);
 
<------>return ret;
}
 
int isci_task_lu_reset(struct domain_device *dev, u8 *lun)
{
<------>struct isci_host *ihost = dev_to_ihost(dev);
<------>struct isci_remote_device *idev;
<------>unsigned long flags;
<------>int ret = TMF_RESP_FUNC_COMPLETE;
 
<------>spin_lock_irqsave(&ihost->scic_lock, flags);
<------>idev = isci_get_device(dev->lldd_dev);
<------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
<------>dev_dbg(&ihost->pdev->dev,
<------><------>"%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
<------><------>__func__, dev, ihost, idev);
 
<------>if (!idev) {
<------><------>/* If the device is gone, escalate to I_T_Nexus_Reset. */
<------><------>dev_dbg(&ihost->pdev->dev, "%s: No dev\n", __func__);
 
<------><------>ret = TMF_RESP_FUNC_FAILED;
<------><------>goto out;
<------>}
 
<------>/* Suspend the RNC, kill all TCs */
<------>if (isci_remote_device_suspend_terminate(ihost, idev, NULL)
<------>    != SCI_SUCCESS) {
<------><------>/* The suspend/terminate only fails if isci_get_device fails */
<------><------>ret = TMF_RESP_FUNC_FAILED;
<------><------>goto out;
<------>}
<------>/* All pending I/Os have been terminated and cleaned up. */
<------>if (!test_bit(IDEV_GONE, &idev->flags)) {
<------><------>if (dev_is_sata(dev))
<------><------><------>sas_ata_schedule_reset(dev);
<------><------>else
<------><------><------>/* Send the task management part of the reset. */
<------><------><------>ret = isci_task_send_lu_reset_sas(ihost, idev, lun);
<------>}
 out:
<------>isci_put_device(idev);
<------>return ret;
}
 
 
/*	 int (*lldd_clear_nexus_port)(struct asd_sas_port *); */
int isci_task_clear_nexus_port(struct asd_sas_port *port)
{
<------>return TMF_RESP_FUNC_FAILED;
}
 
 
 
int isci_task_clear_nexus_ha(struct sas_ha_struct *ha)
{
<------>return TMF_RESP_FUNC_FAILED;
}
 
/* Task Management Functions. Must be called from process context.	 */
 
/**
 * isci_task_abort_task() - This function is one of the SAS Domain Template
 *    functions. This function is called by libsas to abort a specified task.
 * @task: This parameter specifies the SAS task to abort.
 *
 * status, zero indicates success.
 */
int isci_task_abort_task(struct sas_task *task)
{
<------>struct isci_host *ihost = dev_to_ihost(task->dev);
<------>DECLARE_COMPLETION_ONSTACK(aborted_io_completion);
<------>struct isci_request       *old_request = NULL;
<------>struct isci_remote_device *idev = NULL;
<------>struct isci_tmf           tmf;
<------>int                       ret = TMF_RESP_FUNC_FAILED;
<------>unsigned long             flags;
<------>int                       target_done_already = 0;
 
<------>/* Get the isci_request reference from the task.  Note that
<------> * this check does not depend on the pending request list
<------> * in the device, because tasks driving resets may land here
<------> * after completion in the core.
<------> */
<------>spin_lock_irqsave(&ihost->scic_lock, flags);
<------>spin_lock(&task->task_state_lock);
 
<------>old_request = task->lldd_task;
 
<------>/* If task is already done, the request isn't valid */
<------>if (!(task->task_state_flags & SAS_TASK_STATE_DONE) &&
<------>    (task->task_state_flags & SAS_TASK_AT_INITIATOR) &&
<------>    old_request) {
<------><------>idev = isci_get_device(task->dev->lldd_dev);
<------><------>target_done_already = test_bit(IREQ_COMPLETE_IN_TARGET,
<------><------><------><------><------>       &old_request->flags);
<------>}
<------>spin_unlock(&task->task_state_lock);
<------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
<------>dev_warn(&ihost->pdev->dev,
<------><------> "%s: dev = %p (%s%s), task = %p, old_request == %p\n",
<------><------> __func__, idev,
<------><------> (dev_is_sata(task->dev) ? "STP/SATA"
<------><------><------><------><------> : ((dev_is_expander(task->dev->dev_type))
<------><------><------><------><------><------>? "SMP"
<------><------><------><------><------><------>: "SSP")),
<------><------> ((idev) ? ((test_bit(IDEV_GONE, &idev->flags))
<------><------><------>   ? " IDEV_GONE"
<------><------><------>   : "")
<------><------><------> : " <NULL>"),
<------><------> task, old_request);
 
<------>/* Device reset conditions signalled in task_state_flags are the
<------> * responsbility of libsas to observe at the start of the error
<------> * handler thread.
<------> */
<------>if (!idev || !old_request) {
<------><------>/* The request has already completed and there
<------><------>* is nothing to do here other than to set the task
<------><------>* done bit, and indicate that the task abort function
<------><------>* was successful.
<------><------>*/
<------><------>spin_lock_irqsave(&task->task_state_lock, flags);
<------><------>task->task_state_flags |= SAS_TASK_STATE_DONE;
<------><------>task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
<------><------><------><------><------>    SAS_TASK_STATE_PENDING);
<------><------>spin_unlock_irqrestore(&task->task_state_lock, flags);
 
<------><------>ret = TMF_RESP_FUNC_COMPLETE;
 
<------><------>dev_warn(&ihost->pdev->dev,
<------><------><------> "%s: abort task not needed for %p\n",
<------><------><------> __func__, task);
<------><------>goto out;
<------>}
<------>/* Suspend the RNC, kill the TC */
<------>if (isci_remote_device_suspend_terminate(ihost, idev, old_request)
<------>    != SCI_SUCCESS) {
<------><------>dev_warn(&ihost->pdev->dev,
<------><------><------> "%s: isci_remote_device_reset_terminate(dev=%p, "
<------><------><------><------> "req=%p, task=%p) failed\n",
<------><------><------> __func__, idev, old_request, task);
<------><------>ret = TMF_RESP_FUNC_FAILED;
<------><------>goto out;
<------>}
<------>spin_lock_irqsave(&ihost->scic_lock, flags);
 
<------>if (task->task_proto == SAS_PROTOCOL_SMP ||
<------>    sas_protocol_ata(task->task_proto) ||
<------>    target_done_already ||
<------>    test_bit(IDEV_GONE, &idev->flags)) {
 
<------><------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
<------><------>/* No task to send, so explicitly resume the device here */
<------><------>isci_remote_device_resume_from_abort(ihost, idev);
 
<------><------>dev_warn(&ihost->pdev->dev,
<------><------><------> "%s: %s request"
<------><------><------><------> " or complete_in_target (%d), "
<------><------><------><------> "or IDEV_GONE (%d), thus no TMF\n",
<------><------><------> __func__,
<------><------><------> ((task->task_proto == SAS_PROTOCOL_SMP)
<------><------><------>  ? "SMP"
<------><------><------>  : (sas_protocol_ata(task->task_proto)
<------><------><------><------>? "SATA/STP"
<------><------><------><------>: "<other>")
<------><------><------>  ),
<------><------><------> test_bit(IREQ_COMPLETE_IN_TARGET,
<------><------><------><------>  &old_request->flags),
<------><------><------> test_bit(IDEV_GONE, &idev->flags));
 
<------><------>spin_lock_irqsave(&task->task_state_lock, flags);
<------><------>task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR |
<------><------><------><------><------>    SAS_TASK_STATE_PENDING);
<------><------>task->task_state_flags |= SAS_TASK_STATE_DONE;
<------><------>spin_unlock_irqrestore(&task->task_state_lock, flags);
 
<------><------>ret = TMF_RESP_FUNC_COMPLETE;
<------>} else {
<------><------>/* Fill in the tmf structure */
<------><------>isci_task_build_abort_task_tmf(&tmf, isci_tmf_ssp_task_abort,
<------><------><------><------><------>       old_request);
 
<------><------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
<------><------>/* Send the task management request. */
<------><------>#define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* 1/2 second timeout */
<------><------>ret = isci_task_execute_tmf(ihost, idev, &tmf,
<------><------><------><------><------>    ISCI_ABORT_TASK_TIMEOUT_MS);
<------>}
out:
<------>dev_warn(&ihost->pdev->dev,
<------><------> "%s: Done; dev = %p, task = %p , old_request == %p\n",
<------><------> __func__, idev, task, old_request);
<------>isci_put_device(idev);
<------>return ret;
}
 
/**
 * isci_task_abort_task_set() - This function is one of the SAS Domain Template
 *    functions. This is one of the Task Management functoins called by libsas,
 *    to abort all task for the given lun.
 * @d_device: This parameter specifies the domain device associated with this
 *    request.
 * @lun: This parameter specifies the lun associated with this request.
 *
 * status, zero indicates success.
 */
int isci_task_abort_task_set(
<------>struct domain_device *d_device,
<------>u8 *lun)
{
<------>return TMF_RESP_FUNC_FAILED;
}
 
 
/**
 * isci_task_clear_aca() - This function is one of the SAS Domain Template
 *    functions. This is one of the Task Management functoins called by libsas.
 * @d_device: This parameter specifies the domain device associated with this
 *    request.
 * @lun: This parameter specifies the lun	 associated with this request.
 *
 * status, zero indicates success.
 */
int isci_task_clear_aca(
<------>struct domain_device *d_device,
<------>u8 *lun)
{
<------>return TMF_RESP_FUNC_FAILED;
}
 
 
 
/**
 * isci_task_clear_task_set() - This function is one of the SAS Domain Template
 *    functions. This is one of the Task Management functoins called by libsas.
 * @d_device: This parameter specifies the domain device associated with this
 *    request.
 * @lun: This parameter specifies the lun	 associated with this request.
 *
 * status, zero indicates success.
 */
int isci_task_clear_task_set(
<------>struct domain_device *d_device,
<------>u8 *lun)
{
<------>return TMF_RESP_FUNC_FAILED;
}
 
 
/**
 * isci_task_query_task() - This function is implemented to cause libsas to
 *    correctly escalate the failed abort to a LUN or target reset (this is
 *    because sas_scsi_find_task libsas function does not correctly interpret
 *    all return codes from the abort task call).  When TMF_RESP_FUNC_SUCC is
 *    returned, libsas turns this into a LUN reset; when FUNC_FAILED is
 *    returned, libsas will turn this into a target reset
 * @task: This parameter specifies the sas task being queried.
 * @lun: This parameter specifies the lun associated with this request.
 *
 * status, zero indicates success.
 */
int isci_task_query_task(
<------>struct sas_task *task)
{
<------>/* See if there is a pending device reset for this device. */
<------>if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET)
<------><------>return TMF_RESP_FUNC_FAILED;
<------>else
<------><------>return TMF_RESP_FUNC_SUCC;
}
 
/*
 * isci_task_request_complete() - This function is called by the sci core when
 *    an task request completes.
 * @ihost: This parameter specifies the ISCI host object
 * @ireq: This parameter is the completed isci_request object.
 * @completion_status: This parameter specifies the completion status from the
 *    sci core.
 *
 * none.
 */
void
isci_task_request_complete(struct isci_host *ihost,
<------><------><------>   struct isci_request *ireq,
<------><------><------>   enum sci_task_status completion_status)
{
<------>struct isci_tmf *tmf = isci_request_access_tmf(ireq);
<------>struct completion *tmf_complete = NULL;
 
<------>dev_dbg(&ihost->pdev->dev,
<------><------>"%s: request = %p, status=%d\n",
<------><------>__func__, ireq, completion_status);
 
<------>set_bit(IREQ_COMPLETE_IN_TARGET, &ireq->flags);
 
<------>if (tmf) {
<------><------>tmf->status = completion_status;
 
<------><------>if (tmf->proto == SAS_PROTOCOL_SSP) {
<------><------><------>memcpy(&tmf->resp.resp_iu,
<------><------><------>       &ireq->ssp.rsp,
<------><------><------>       SSP_RESP_IU_MAX_SIZE);
<------><------>} else if (tmf->proto == SAS_PROTOCOL_SATA) {
<------><------><------>memcpy(&tmf->resp.d2h_fis,
<------><------><------>       &ireq->stp.rsp,
<------><------><------>       sizeof(struct dev_to_host_fis));
<------><------>}
<------><------>/* PRINT_TMF( ((struct isci_tmf *)request->task)); */
<------><------>tmf_complete = tmf->complete;
<------>}
<------>sci_controller_complete_io(ihost, ireq->target_device, ireq);
<------>/* set the 'terminated' flag handle to make sure it cannot be terminated
<------> *  or completed again.
<------> */
<------>set_bit(IREQ_TERMINATED, &ireq->flags);
 
<------>if (test_and_clear_bit(IREQ_ABORT_PATH_ACTIVE, &ireq->flags))
<------><------>wake_up_all(&ihost->eventq);
 
<------>if (!test_bit(IREQ_NO_AUTO_FREE_TAG, &ireq->flags))
<------><------>isci_free_tag(ihost, ireq->io_tag);
 
<------>/* The task management part completes last. */
<------>if (tmf_complete)
<------><------>complete(tmf_complete);
}
 
static int isci_reset_device(struct isci_host *ihost,
<------><------><------>     struct domain_device *dev,
<------><------><------>     struct isci_remote_device *idev)
{
<------>int rc = TMF_RESP_FUNC_COMPLETE, reset_stat = -1;
<------>struct sas_phy *phy = sas_get_local_phy(dev);
<------>struct isci_port *iport = dev->port->lldd_port;
 
<------>dev_dbg(&ihost->pdev->dev, "%s: idev %p\n", __func__, idev);
 
<------>/* Suspend the RNC, terminate all outstanding TCs. */
<------>if (isci_remote_device_suspend_terminate(ihost, idev, NULL)
<------>    != SCI_SUCCESS) {
<------><------>rc = TMF_RESP_FUNC_FAILED;
<------><------>goto out;
<------>}
<------>/* Note that since the termination for outstanding requests succeeded,
<------> * this function will return success.  This is because the resets will
<------> * only fail if the device has been removed (ie. hotplug), and the
<------> * primary duty of this function is to cleanup tasks, so that is the
<------> * relevant status.
<------> */
<------>if (!test_bit(IDEV_GONE, &idev->flags)) {
<------><------>if (scsi_is_sas_phy_local(phy)) {
<------><------><------>struct isci_phy *iphy = &ihost->phys[phy->number];
 
<------><------><------>reset_stat = isci_port_perform_hard_reset(ihost, iport,
<------><------><------><------><------><------><------><------>  iphy);
<------><------>} else
<------><------><------>reset_stat = sas_phy_reset(phy, !dev_is_sata(dev));
<------>}
<------>/* Explicitly resume the RNC here, since there was no task sent. */
<------>isci_remote_device_resume_from_abort(ihost, idev);
 
<------>dev_dbg(&ihost->pdev->dev, "%s: idev %p complete, reset_stat=%d.\n",
<------><------>__func__, idev, reset_stat);
 out:
<------>sas_put_local_phy(phy);
<------>return rc;
}
 
int isci_task_I_T_nexus_reset(struct domain_device *dev)
{
<------>struct isci_host *ihost = dev_to_ihost(dev);
<------>struct isci_remote_device *idev;
<------>unsigned long flags;
<------>int ret;
 
<------>spin_lock_irqsave(&ihost->scic_lock, flags);
<------>idev = isci_get_device(dev->lldd_dev);
<------>spin_unlock_irqrestore(&ihost->scic_lock, flags);
 
<------>if (!idev) {
<------><------>/* XXX: need to cleanup any ireqs targeting this
<------><------> * domain_device
<------><------> */
<------><------>ret = -ENODEV;
<------><------>goto out;
<------>}
 
<------>ret = isci_reset_device(ihost, dev, idev);
 out:
<------>isci_put_device(idev);
<------>return ret;
}