enum sci_status sci_remote_node_context_destruct(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_INVALIDATING:
		sci_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p);
		return SCI_SUCCESS;
	case SCI_RNC_POSTING:
	case SCI_RNC_RESUMING:
	case SCI_RNC_READY:
	case SCI_RNC_TX_SUSPENDED:
	case SCI_RNC_TX_RX_SUSPENDED:
	case SCI_RNC_AWAIT_SUSPENSION:
		sci_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p);
		sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING);
		return SCI_SUCCESS;
	case SCI_RNC_INITIAL:
		dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
			 "%s: invalid state %d\n", __func__, state);
		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;
	}
}
Ejemplo n.º 2
0
enum sci_status sci_remote_node_context_destruct(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_INVALIDATING:
		sci_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p);
		return SCI_SUCCESS;
	case SCI_RNC_POSTING:
	case SCI_RNC_RESUMING:
	case SCI_RNC_READY:
	case SCI_RNC_TX_SUSPENDED:
	case SCI_RNC_TX_RX_SUSPENDED:
	case SCI_RNC_AWAIT_SUSPENSION:
		sci_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p);
		sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING);
		return SCI_SUCCESS;
	case SCI_RNC_INITIAL:
		dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
			 "%s: invalid state %d\n", __func__, state);
		/* We have decided that the destruct request on the remote node context
		 * can not fail since it is either in the initial/destroyed state or is
		 * can be destroyed.
		 */
		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;
	}
}
Ejemplo n.º 3
0
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;
}
Ejemplo n.º 4
0
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;
	}
}
Ejemplo n.º 5
0
enum sci_status sci_remote_node_context_start_task(
	struct sci_remote_node_context *sci_rnc,
	struct isci_request *ireq,
	scics_sds_remote_node_context_callback cb_fn,
	void *cb_p)
{
	enum sci_status status = sci_remote_node_context_resume(sci_rnc,
								cb_fn, cb_p);
	if (status != SCI_SUCCESS)
		dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
			"%s: resume failed: %d\n", __func__, status);
	return status;
}
Ejemplo n.º 6
0
enum sci_status sci_remote_node_context_start_io(struct sci_remote_node_context *sci_rnc,
							     struct isci_request *ireq)
{
	enum scis_sds_remote_node_context_states state;

	state = sci_rnc->sm.current_state_id;

	switch (state) {
	case SCI_RNC_READY:
		return SCI_SUCCESS;
	case SCI_RNC_TX_SUSPENDED:
	case SCI_RNC_TX_RX_SUSPENDED:
	case SCI_RNC_AWAIT_SUSPENSION:
		dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
			 "%s: invalid state %d\n", __func__, state);
		return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED;
	default:
		break;
	}
	dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
		"%s: requested to start IO while still resuming, %d\n",
		__func__, state);
	return SCI_FAILURE_INVALID_STATE;
}
Ejemplo n.º 7
0
enum sci_status sci_remote_node_context_start_task(struct sci_remote_node_context *sci_rnc,
							struct isci_request *ireq)
{
	enum scis_sds_remote_node_context_states state;

	state = sci_rnc->sm.current_state_id;
	switch (state) {
	case SCI_RNC_RESUMING:
	case SCI_RNC_READY:
	case SCI_RNC_AWAIT_SUSPENSION:
		return SCI_SUCCESS;
	case SCI_RNC_TX_SUSPENDED:
	case SCI_RNC_TX_RX_SUSPENDED:
		sci_remote_node_context_resume(sci_rnc, NULL, NULL);
		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;
	}
}
Ejemplo n.º 8
0
int sci_remote_node_context_is_safe_to_abort(
	struct sci_remote_node_context *sci_rnc)
{
	enum scis_sds_remote_node_context_states state;

	state = sci_rnc->sm.current_state_id;
	switch (state) {
	case SCI_RNC_INVALIDATING:
	case SCI_RNC_TX_RX_SUSPENDED:
		return 1;
	case SCI_RNC_POSTING:
	case SCI_RNC_RESUMING:
	case SCI_RNC_READY:
	case SCI_RNC_TX_SUSPENDED:
	case SCI_RNC_AWAIT_SUSPENSION:
	case SCI_RNC_INITIAL:
		return 0;
	default:
		dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
			 "%s: invalid state %d\n", __func__, state);
		return 0;
	}
}
Ejemplo n.º 9
0
enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_context *sci_rnc,
							   u32 event_code)
{
	enum scis_sds_remote_node_context_states state;

	state = sci_rnc->sm.current_state_id;
	switch (state) {
	case SCI_RNC_POSTING:
		switch (scu_get_event_code(event_code)) {
		case SCU_EVENT_POST_RNC_COMPLETE:
			sci_change_state(&sci_rnc->sm, SCI_RNC_READY);
			break;
		default:
			goto out;
		}
		break;
	case SCI_RNC_INVALIDATING:
		if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) {
			if (sci_rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL)
				state = SCI_RNC_INITIAL;
			else
				state = SCI_RNC_POSTING;
			sci_change_state(&sci_rnc->sm, state);
		} else {
			switch (scu_get_event_type(event_code)) {
			case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
			case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
				/* We really dont care if the hardware is going to suspend
				 * the device since it's being invalidated anyway */
				dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
					"%s: SCIC Remote Node Context 0x%p was "
					"suspeneded by hardware while being "
					"invalidated.\n", __func__, sci_rnc);
				break;
			default:
				goto out;
			}
		}
		break;
	case SCI_RNC_RESUMING:
		if (scu_get_event_code(event_code) == SCU_EVENT_POST_RCN_RELEASE) {
			sci_change_state(&sci_rnc->sm, SCI_RNC_READY);
		} else {
			switch (scu_get_event_type(event_code)) {
			case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
			case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
				/* We really dont care if the hardware is going to suspend
				 * the device since it's being resumed anyway */
				dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
					"%s: SCIC Remote Node Context 0x%p was "
					"suspeneded by hardware while being resumed.\n",
					__func__, sci_rnc);
				break;
			default:
				goto out;
			}
		}
		break;
	case SCI_RNC_READY:
		switch (scu_get_event_type(event_code)) {
		case SCU_EVENT_TL_RNC_SUSPEND_TX:
			sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED);
			sci_rnc->suspension_code = scu_get_event_specifier(event_code);
			break;
		case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
			sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
			sci_rnc->suspension_code = scu_get_event_specifier(event_code);
			break;
		default:
			goto out;
		}
		break;
	case SCI_RNC_AWAIT_SUSPENSION:
		switch (scu_get_event_type(event_code)) {
		case SCU_EVENT_TL_RNC_SUSPEND_TX:
			sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED);
			sci_rnc->suspension_code = scu_get_event_specifier(event_code);
			break;
		case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
			sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
			sci_rnc->suspension_code = scu_get_event_specifier(event_code);
			break;
		default:
			goto out;
		}
		break;
	default:
		dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
			 "%s: invalid state %d\n", __func__, state);
		return SCI_FAILURE_INVALID_STATE;
	}
	return SCI_SUCCESS;

 out:
	dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
		 "%s: code: %#x state: %d\n", __func__, event_code, state);
	return SCI_FAILURE;

}
Ejemplo n.º 10
0
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;
	}
}
Ejemplo n.º 11
0
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;
}