enum sci_status sci_remote_node_context_resume(struct sci_remote_node_context *sci_rnc,
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;
switch (state) {
case SCI_RNC_INITIAL:
if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
return SCI_FAILURE_INVALID_STATE;
sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
sci_remote_node_context_construct_buffer(sci_rnc);
sci_change_state(&sci_rnc->sm, SCI_RNC_POSTING);
return SCI_SUCCESS;
case SCI_RNC_POSTING:
case SCI_RNC_INVALIDATING:
case SCI_RNC_RESUMING:
if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY)
return SCI_FAILURE_INVALID_STATE;
sci_rnc->user_callback = cb_fn;
sci_rnc->user_cookie = cb_p;
return SCI_SUCCESS;
case SCI_RNC_TX_SUSPENDED: {
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
struct domain_device *dev = idev->domain_dev;
sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
/* TODO: consider adding a resume action of NONE, INVALIDATE, WRITE_TLCR */
if (dev->dev_type == SAS_END_DEV || dev_is_expander(dev))
sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING);
else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
if (idev->is_direct_attached) {
/* @todo Fix this since I am being silly in writing to the STPTLDARNI register. */
sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING);
} else {
sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING);
}
} else
return SCI_FAILURE;
return SCI_SUCCESS;
}
case SCI_RNC_TX_RX_SUSPENDED:
sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
sci_change_state(&sci_rnc->sm, SCI_RNC_RESUMING);
return SCI_FAILURE_INVALID_STATE;
case SCI_RNC_AWAIT_SUSPENSION:
sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p);
return SCI_SUCCESS;
default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: invalid state %d\n", __func__, state);
return SCI_FAILURE_INVALID_STATE;
}
}
enum sci_status sci_remote_node_context_resume(struct sci_remote_node_context *sci_rnc,
scics_sds_remote_node_context_callback cb_fn,
void *cb_p)
{
enum scis_sds_remote_node_context_states state;
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
state = sci_rnc->sm.current_state_id;
dev_dbg(scirdev_to_dev(idev),
"%s: state %s, cb_fn = %p, cb_p = %p; dest_state = %d; "
"dev resume path %s\n",
__func__, rnc_state_name(state), cb_fn, cb_p,
sci_rnc->destination_state,
test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)
? "<abort active>" : "<normal>");
switch (state) {
case SCI_RNC_INITIAL:
if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
return SCI_FAILURE_INVALID_STATE;
sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p,
RNC_DEST_READY);
if (!test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)) {
sci_remote_node_context_construct_buffer(sci_rnc);
sci_change_state(&sci_rnc->sm, SCI_RNC_POSTING);
}
return SCI_SUCCESS;
case SCI_RNC_POSTING:
case SCI_RNC_INVALIDATING:
case SCI_RNC_RESUMING:
/* We are still waiting to post when a resume was
* requested.
*/
switch (sci_rnc->destination_state) {
case RNC_DEST_SUSPENDED:
case RNC_DEST_SUSPENDED_RESUME:
/* Previously waiting to suspend after posting.
* Now continue onto resumption.
*/
sci_remote_node_context_setup_to_resume(
sci_rnc, cb_fn, cb_p,
RNC_DEST_SUSPENDED_RESUME);
break;
default:
sci_remote_node_context_setup_to_resume(
sci_rnc, cb_fn, cb_p,
RNC_DEST_READY);
break;
}
return SCI_SUCCESS;
case SCI_RNC_TX_SUSPENDED:
case SCI_RNC_TX_RX_SUSPENDED:
{
struct domain_device *dev = idev->domain_dev;
/* If this is an expander attached SATA device we must
* invalidate and repost the RNC since this is the only
* way to clear the TCi to NCQ tag mapping table for
* the RNi. All other device types we can just resume.
*/
sci_remote_node_context_setup_to_resume(
sci_rnc, cb_fn, cb_p, RNC_DEST_READY);
if (!test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)) {
if ((dev_is_sata(dev) && dev->parent) ||
(sci_rnc->destination_state == RNC_DEST_FINAL))
sci_change_state(&sci_rnc->sm,
SCI_RNC_INVALIDATING);
else
sci_change_state(&sci_rnc->sm,
SCI_RNC_RESUMING);
}
}
return SCI_SUCCESS;
case SCI_RNC_AWAIT_SUSPENSION:
sci_remote_node_context_setup_to_resume(
sci_rnc, cb_fn, cb_p, RNC_DEST_SUSPENDED_RESUME);
return SCI_SUCCESS;
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;
}
}
