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| Current File : //sys/dev/isci/isci_remote_device.c |
/*-
* 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.
*
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/isci/isci_remote_device.c 239743 2012-08-27 18:14:22Z jimharris $");
#include <dev/isci/isci.h>
#include <cam/cam_periph.h>
#include <cam/cam_xpt_periph.h>
#include <dev/isci/scil/scif_task_request.h>
#include <dev/isci/scil/scif_controller.h>
#include <dev/isci/scil/scif_domain.h>
#include <dev/isci/scil/scif_user_callback.h>
#include <dev/isci/scil/scic_port.h>
#include <dev/isci/scil/scic_phy.h>
/**
* @brief This callback method informs the framework user that the remote
* device is ready and capable of processing IO requests.
*
* @param[in] controller This parameter specifies the controller object
* with which this callback is associated.
* @param[in] domain This parameter specifies the domain object with
* which this callback is associated.
* @param[in] remote_device This parameter specifies the device object with
* which this callback is associated.
*
* @return none
*/
void
scif_cb_remote_device_ready(SCI_CONTROLLER_HANDLE_T controller,
SCI_DOMAIN_HANDLE_T domain, SCI_REMOTE_DEVICE_HANDLE_T remote_device)
{
struct ISCI_REMOTE_DEVICE *isci_remote_device =
sci_object_get_association(remote_device);
struct ISCI_CONTROLLER *isci_controller =
sci_object_get_association(controller);
uint32_t device_index = isci_remote_device->index;
if (isci_controller->remote_device[device_index] == NULL) {
/* This new device is now ready, so put it in the controller's
* remote device list so it is visible to CAM.
*/
isci_controller->remote_device[device_index] =
isci_remote_device;
if (isci_controller->has_been_scanned) {
/* The sim object has been scanned at least once
* already. In that case, create a CCB to instruct
* CAM to rescan this device.
* If the sim object has not been scanned, this device
* will get scanned as part of the initial scan.
*/
union ccb *ccb = xpt_alloc_ccb_nowait();
xpt_create_path(&ccb->ccb_h.path, xpt_periph,
cam_sim_path(isci_controller->sim),
isci_remote_device->index, CAM_LUN_WILDCARD);
xpt_rescan(ccb);
}
}
isci_remote_device_release_device_queue(isci_remote_device);
}
/**
* @brief This callback method informs the framework user that the remote
* device is not ready. Thus, it is incapable of processing IO
* requests.
*
* @param[in] controller This parameter specifies the controller object
* with which this callback is associated.
* @param[in] domain This parameter specifies the domain object with
* which this callback is associated.
* @param[in] remote_device This parameter specifies the device object with
* which this callback is associated.
*
* @return none
*/
void
scif_cb_remote_device_not_ready(SCI_CONTROLLER_HANDLE_T controller,
SCI_DOMAIN_HANDLE_T domain, SCI_REMOTE_DEVICE_HANDLE_T remote_device)
{
}
/**
* @brief This callback method informs the framework user that the remote
* device failed. This typically occurs shortly after the device
* has been discovered, during the configuration phase for the device.
*
* @param[in] controller This parameter specifies the controller object
* with which this callback is associated.
* @param[in] domain This parameter specifies the domain object with
* which this callback is associated.
* @param[in] remote_device This parameter specifies the device object with
* which this callback is associated.
* @param[in] status This parameter specifies the specific failure condition
* associated with this device failure.
*
* @return none
*/
void
scif_cb_remote_device_failed(SCI_CONTROLLER_HANDLE_T controller,
SCI_DOMAIN_HANDLE_T domain, SCI_REMOTE_DEVICE_HANDLE_T remote_device,
SCI_STATUS status)
{
}
void
isci_remote_device_reset(struct ISCI_REMOTE_DEVICE *remote_device,
union ccb *ccb)
{
struct ISCI_CONTROLLER *controller = remote_device->domain->controller;
struct ISCI_REQUEST *request;
struct ISCI_TASK_REQUEST *task_request;
SCI_STATUS status;
if (remote_device->is_resetting == TRUE) {
/* device is already being reset, so return immediately */
return;
}
if (sci_pool_empty(controller->request_pool)) {
/* No requests are available in our request pool. If this reset is tied
* to a CCB, ask CAM to requeue it. Otherwise, we need to put it on our
* pending device reset list, so that the reset will occur when a request
* frees up.
*/
if (ccb == NULL)
sci_fast_list_insert_tail(
&controller->pending_device_reset_list,
&remote_device->pending_device_reset_element);
else {
ccb->ccb_h.status &= ~CAM_STATUS_MASK;
ccb->ccb_h.status |= CAM_REQUEUE_REQ;
xpt_done(ccb);
}
return;
}
isci_log_message(0, "ISCI",
"Sending reset to device on controller %d domain %d CAM index %d\n",
controller->index, remote_device->domain->index,
remote_device->index
);
sci_pool_get(controller->request_pool, request);
task_request = (struct ISCI_TASK_REQUEST *)request;
task_request->parent.remote_device_handle = remote_device->sci_object;
task_request->ccb = ccb;
remote_device->is_resetting = TRUE;
status = (SCI_STATUS) scif_task_request_construct(
controller->scif_controller_handle, remote_device->sci_object,
SCI_CONTROLLER_INVALID_IO_TAG, (void *)task_request,
(void *)((char*)task_request + sizeof(struct ISCI_TASK_REQUEST)),
&task_request->sci_object);
if (status != SCI_SUCCESS) {
isci_task_request_complete(controller->scif_controller_handle,
remote_device->sci_object, task_request->sci_object,
(SCI_TASK_STATUS)status);
return;
}
status = (SCI_STATUS)scif_controller_start_task(
controller->scif_controller_handle, remote_device->sci_object,
task_request->sci_object, SCI_CONTROLLER_INVALID_IO_TAG);
if (status != SCI_SUCCESS) {
isci_task_request_complete(
controller->scif_controller_handle,
remote_device->sci_object, task_request->sci_object,
(SCI_TASK_STATUS)status);
return;
}
}
uint32_t
isci_remote_device_get_bitrate(struct ISCI_REMOTE_DEVICE *remote_device)
{
struct ISCI_DOMAIN *domain = remote_device->domain;
struct ISCI_CONTROLLER *controller = domain->controller;
SCI_PORT_HANDLE_T port_handle;
SCIC_PORT_PROPERTIES_T port_properties;
uint8_t phy_index;
SCI_PHY_HANDLE_T phy_handle;
SCIC_PHY_PROPERTIES_T phy_properties;
/* get a handle to the port associated with this remote device's
* domain
*/
port_handle = scif_domain_get_scic_port_handle(domain->sci_object);
scic_port_get_properties(port_handle, &port_properties);
/* get the lowest numbered phy in the port */
phy_index = 0;
while ((port_properties.phy_mask != 0) &&
!(port_properties.phy_mask & 0x1)) {
phy_index++;
port_properties.phy_mask >>= 1;
}
/* get the properties for the lowest numbered phy */
scic_controller_get_phy_handle(
scif_controller_get_scic_handle(controller->scif_controller_handle),
phy_index, &phy_handle);
scic_phy_get_properties(phy_handle, &phy_properties);
switch (phy_properties.negotiated_link_rate) {
case SCI_SAS_150_GB:
return (150000);
case SCI_SAS_300_GB:
return (300000);
case SCI_SAS_600_GB:
return (600000);
default:
return (0);
}
}
void
isci_remote_device_freeze_lun_queue(struct ISCI_REMOTE_DEVICE *remote_device,
lun_id_t lun)
{
if (!(remote_device->frozen_lun_mask & (1 << lun))) {
struct cam_path *path;
xpt_create_path(&path, xpt_periph,
cam_sim_path(remote_device->domain->controller->sim),
remote_device->index, lun);
xpt_freeze_devq(path, 1);
xpt_free_path(path);
remote_device->frozen_lun_mask |= (1 << lun);
}
}
void
isci_remote_device_release_lun_queue(struct ISCI_REMOTE_DEVICE *remote_device,
lun_id_t lun)
{
if (remote_device->frozen_lun_mask & (1 << lun)) {
struct cam_path *path;
remote_device->frozen_lun_mask &= ~(1 << lun);
xpt_create_path(&path, xpt_periph,
cam_sim_path(remote_device->domain->controller->sim),
remote_device->index, lun);
xpt_release_devq(path, 1, TRUE);
xpt_free_path(path);
}
}
void
isci_remote_device_release_device_queue(
struct ISCI_REMOTE_DEVICE *device)
{
if (TAILQ_EMPTY(&device->queued_ccbs)) {
lun_id_t lun;
for (lun = 0; lun < ISCI_MAX_LUN; lun++)
isci_remote_device_release_lun_queue(device, lun);
} else {
/*
* We cannot unfreeze the devq, because there are still
* CCBs in our internal queue that need to be processed
* first. Mark this device, and the controller, so that
* the first CCB in this device's internal queue will be
* resubmitted after the current completion context
* unwinds.
*/
device->release_queued_ccb = TRUE;
device->domain->controller->release_queued_ccbs = TRUE;
isci_log_message(1, "ISCI", "schedule %p for release\n",
device);
}
}