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; } }