enum sci_status sci_remote_node_context_suspend(struct sci_remote_node_context *sci_rnc,
u32 suspend_type,
scics_sds_remote_node_context_callback cb_fn,
void *cb_p)
{
enum scis_sds_remote_node_context_states state;
state = sci_rnc->sm.current_state_id;
if (state != SCI_RNC_READY) {
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: invalid state %d\n", __func__, state);
return SCI_FAILURE_INVALID_STATE;
}
sci_rnc->user_callback = cb_fn;
sci_rnc->user_cookie = cb_p;
sci_rnc->suspension_code = suspend_type;
if (suspend_type == SCI_SOFTWARE_SUSPENSION) {
sci_remote_device_post_request(rnc_to_dev(sci_rnc),
SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX);
}
sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION);
return SCI_SUCCESS;
}
static void sci_remote_node_context_validate_context_buffer(struct sci_remote_node_context *sci_rnc)
{
union scu_remote_node_context *rnc_buffer;
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
struct domain_device *dev = idev->domain_dev;
struct isci_host *ihost = idev->owning_port->owning_controller;
rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index);
rnc_buffer->ssp.is_valid = true;
if (dev_is_sata(dev) && dev->parent) {
sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_96);
} else {
sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_32);
if (!dev->parent)
sci_port_setup_transports(idev->owning_port,
sci_rnc->remote_node_index);
}
}
static void sci_remote_node_context_invalidate_context_buffer(struct sci_remote_node_context *sci_rnc)
{
union scu_remote_node_context *rnc_buffer;
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
struct isci_host *ihost = idev->owning_port->owning_controller;
rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index);
rnc_buffer->ssp.is_valid = false;
sci_remote_device_post_request(rnc_to_dev(sci_rnc),
SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE);
}
static void sci_remote_node_context_validate_context_buffer(struct sci_remote_node_context *sci_rnc)
{
union scu_remote_node_context *rnc_buffer;
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
struct domain_device *dev = idev->domain_dev;
struct isci_host *ihost = idev->owning_port->owning_controller;
rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index);
rnc_buffer->ssp.is_valid = true;
if (!idev->is_direct_attached &&
(dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))) {
sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_96);
} else {
sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_32);
if (idev->is_direct_attached)
sci_port_setup_transports(idev->owning_port,
sci_rnc->remote_node_index);
}
}
static void sci_remote_node_context_resuming_state_enter(struct sci_base_state_machine *sm)
{
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
struct isci_remote_device *idev;
struct domain_device *dev;
idev = rnc_to_dev(rnc);
dev = idev->domain_dev;
if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) &&
idev->is_direct_attached)
sci_port_setup_transports(idev->owning_port,
rnc->remote_node_index);
sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME);
}
static void sci_remote_node_context_resuming_state_enter(struct sci_base_state_machine *sm)
{
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
struct isci_remote_device *idev;
struct domain_device *dev;
idev = rnc_to_dev(rnc);
dev = idev->domain_dev;
/*
* For direct attached SATA devices we need to clear the TLCR
* NCQ to TCi tag mapping on the phy and in cases where we
* resume because of a target reset we also need to update
* the STPTLDARNI register with the RNi of the device
*/
if (dev_is_sata(dev) && !dev->parent)
sci_port_setup_transports(idev->owning_port, rnc->remote_node_index);
sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME);
}
enum sci_status sci_remote_node_context_suspend(
struct sci_remote_node_context *sci_rnc,
enum sci_remote_node_suspension_reasons suspend_reason,
u32 suspend_type)
{
enum scis_sds_remote_node_context_states state
= sci_rnc->sm.current_state_id;
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
enum sci_status status = SCI_FAILURE_INVALID_STATE;
enum sci_remote_node_context_destination_state dest_param =
RNC_DEST_UNSPECIFIED;
dev_dbg(scirdev_to_dev(idev),
"%s: current state %s, current suspend_type %x dest state %d,"
" arg suspend_reason %d, arg suspend_type %x",
__func__, rnc_state_name(state), sci_rnc->suspend_type,
sci_rnc->destination_state, suspend_reason,
suspend_type);
/* Disable automatic state continuations if explicitly suspending. */
if ((suspend_reason == SCI_HW_SUSPEND) ||
(sci_rnc->destination_state == RNC_DEST_FINAL))
dest_param = sci_rnc->destination_state;
switch (state) {
case SCI_RNC_READY:
break;
case SCI_RNC_INVALIDATING:
if (sci_rnc->destination_state == RNC_DEST_FINAL) {
dev_warn(scirdev_to_dev(idev),
"%s: already destroying %p\n",
__func__, sci_rnc);
return SCI_FAILURE_INVALID_STATE;
}
/* Fall through and handle like SCI_RNC_POSTING */
case SCI_RNC_RESUMING:
/* Fall through and handle like SCI_RNC_POSTING */
case SCI_RNC_POSTING:
/* Set the destination state to AWAIT - this signals the
* entry into the SCI_RNC_READY state that a suspension
* needs to be done immediately.
*/
if (sci_rnc->destination_state != RNC_DEST_FINAL)
sci_rnc->destination_state = RNC_DEST_SUSPENDED;
sci_rnc->suspend_type = suspend_type;
sci_rnc->suspend_reason = suspend_reason;
return SCI_SUCCESS;
case SCI_RNC_TX_SUSPENDED:
if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX)
status = SCI_SUCCESS;
break;
case SCI_RNC_TX_RX_SUSPENDED:
if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX)
status = SCI_SUCCESS;
break;
case SCI_RNC_AWAIT_SUSPENSION:
if ((sci_rnc->suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX)
|| (suspend_type == sci_rnc->suspend_type))
return SCI_SUCCESS;
break;
default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: invalid state %s\n", __func__,
rnc_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
sci_rnc->destination_state = dest_param;
sci_rnc->suspend_type = suspend_type;
sci_rnc->suspend_reason = suspend_reason;
if (status == SCI_SUCCESS) { /* Already in the destination state? */
struct isci_host *ihost = idev->owning_port->owning_controller;
wake_up_all(&ihost->eventq); /* Let observers look. */
return SCI_SUCCESS;
}
if ((suspend_reason == SCI_SW_SUSPEND_NORMAL) ||
(suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT)) {
if (suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT)
isci_dev_set_hang_detection_timeout(idev, 0x00000001);
sci_remote_device_post_request(
idev, SCI_SOFTWARE_SUSPEND_CMD);
}
if (state != SCI_RNC_AWAIT_SUSPENSION)
sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION);
return SCI_SUCCESS;
}