path: root/drivers/scsi/isci/core/scic_phy.h

/*
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 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
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 * General Public License for more details.
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 * in the file called LICENSE.GPL.
 *
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#ifndef _SCIC_PHY_H_
#define _SCIC_PHY_H_

/**
 * This file contains all of the interface methods that can be called by an
 *    SCIC user on a phy (SAS or SATA) object.
 *
 *
 */


#include <scsi/sas.h>
#include <scsi/libsas.h>
#include "sci_status.h"
#include "intel_sas.h"

struct scic_sds_phy;
struct scic_sds_port;


enum sas_linkrate sci_phy_linkrate(struct scic_sds_phy *sci_phy);

/**
 * struct scic_phy_properties - This structure defines the properties common to
 *    all phys that can be retrieved.
 *
 *
 */
struct scic_phy_properties {
	/**
	 * This field specifies the port that currently contains the
	 * supplied phy.  This field may be set to NULL
	 * if the phy is not currently contained in a port.
	 */
	struct scic_sds_port *owning_port;

	/**
	 * This field specifies the link rate at which the phy is
	 * currently operating.
	 */
	enum sas_linkrate negotiated_link_rate;

	/**
	 * This field indicates the protocols supported by the phy.
	 */
	struct sci_sas_identify_address_frame_protocols protocols;

	/**
	 * This field specifies the index of the phy in relation to other
	 * phys within the controller.  This index is zero relative.
	 */
	u8 index;

};

/**
 * struct scic_sas_phy_properties - This structure defines the properties,
 *    specific to a SAS phy, that can be retrieved.
 *
 *
 */
struct scic_sas_phy_properties {
	/**
	 * This field delineates the Identify Address Frame received
	 * from the remote end point.
	 */
	struct sas_identify_frame rcvd_iaf;

	/**
	 * This field delineates the Phy capabilities structure received
	 * from the remote end point.
	 */
	struct sas_capabilities received_capabilities;

};

/**
 * struct scic_sata_phy_properties - This structure defines the properties,
 *    specific to a SATA phy, that can be retrieved.
 *
 *
 */
struct scic_sata_phy_properties {
	/**
	 * This field delineates the signature FIS received from the
	 * attached target.
	 */
	struct dev_to_host_fis signature_fis;

	/**
	 * This field specifies to the user if a port selector is connected
	 * on the specified phy.
	 */
	bool is_port_selector_present;

};

/**
 * enum scic_phy_counter_id - This enumeration depicts the various pieces of
 *    optional information that can be retrieved for a specific phy.
 *
 *
 */
enum scic_phy_counter_id {
	/**
	 * This PHY information field tracks the number of frames received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME,

	/**
	 * This PHY information field tracks the number of frames transmitted.
	 */
	SCIC_PHY_COUNTER_TRANSMITTED_FRAME,

	/**
	 * This PHY information field tracks the number of DWORDs received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME_WORD,

	/**
	 * This PHY information field tracks the number of DWORDs transmitted.
	 */
	SCIC_PHY_COUNTER_TRANSMITTED_FRAME_DWORD,

	/**
	 * This PHY information field tracks the number of times DWORD
	 * synchronization was lost.
	 */
	SCIC_PHY_COUNTER_LOSS_OF_SYNC_ERROR,

	/**
	 * This PHY information field tracks the number of received DWORDs with
	 * running disparity errors.
	 */
	SCIC_PHY_COUNTER_RECEIVED_DISPARITY_ERROR,

	/**
	 * This PHY information field tracks the number of received frames with a
	 * CRC error (not including short or truncated frames).
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME_CRC_ERROR,

	/**
	 * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT)
	 * primitives received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_DONE_ACK_NAK_TIMEOUT,

	/**
	 * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT)
	 * primitives transmitted.
	 */
	SCIC_PHY_COUNTER_TRANSMITTED_DONE_ACK_NAK_TIMEOUT,

	/**
	 * This PHY information field tracks the number of times the inactivity
	 * timer for connections on the phy has been utilized.
	 */
	SCIC_PHY_COUNTER_INACTIVITY_TIMER_EXPIRED,

	/**
	 * This PHY information field tracks the number of DONE (CREDIT TIMEOUT)
	 * primitives received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_DONE_CREDIT_TIMEOUT,

	/**
	 * This PHY information field tracks the number of DONE (CREDIT TIMEOUT)
	 * primitives transmitted.
	 */
	SCIC_PHY_COUNTER_TRANSMITTED_DONE_CREDIT_TIMEOUT,

	/**
	 * This PHY information field tracks the number of CREDIT BLOCKED
	 * primitives received.
	 * @note Depending on remote device implementation, credit blocks
	 *       may occur regularly.
	 */
	SCIC_PHY_COUNTER_RECEIVED_CREDIT_BLOCKED,

	/**
	 * This PHY information field contains the number of short frames
	 * received.  A short frame is simply a frame smaller then what is
	 * allowed by either the SAS or SATA specification.
	 */
	SCIC_PHY_COUNTER_RECEIVED_SHORT_FRAME,

	/**
	 * This PHY information field contains the number of frames received after
	 * credit has been exhausted.
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME_WITHOUT_CREDIT,

	/**
	 * This PHY information field contains the number of frames received after
	 * a DONE has been received.
	 */
	SCIC_PHY_COUNTER_RECEIVED_FRAME_AFTER_DONE,

	/**
	 * This PHY information field contains the number of times the phy
	 * failed to achieve DWORD synchronization during speed negotiation.
	 */
	SCIC_PHY_COUNTER_SN_DWORD_SYNC_ERROR
};


/**
 * scic_sas_phy_get_properties() - This method will enable the user to retrieve
 *    information specific to a SAS phy, such as: the received identify address
 *    frame, received phy capabilities, etc.
 * @phy: this parameter specifies the phy for which to retrieve properties.
 * @properties: This parameter specifies the properties structure into which to
 *    copy the requested information.
 *
 * This method returns an indication as to whether the SAS phy properties were
 * successfully retrieved. SCI_SUCCESS This value is returned if the SAS
 * properties are successfully retrieved. SCI_FAILURE This value is returned if
 * the SAS properties are not successfully retrieved (e.g. It's not a SAS Phy).
 */
enum sci_status scic_sas_phy_get_properties(
	struct scic_sds_phy *phy,
	struct scic_sas_phy_properties *properties);

/**
 * scic_sata_phy_get_properties() - This method will enable the user to
 *    retrieve information specific to a SATA phy, such as: the received
 *    signature FIS, if a port selector is present, etc.
 * @phy: this parameter specifies the phy for which to retrieve properties.
 * @properties: This parameter specifies the properties structure into which to
 *    copy the requested information.
 *
 * This method returns an indication as to whether the SATA phy properties were
 * successfully retrieved. SCI_SUCCESS This value is returned if the SATA
 * properties are successfully retrieved. SCI_FAILURE This value is returned if
 * the SATA properties are not successfully retrieved (e.g. It's not a SATA
 * Phy).
 */
enum sci_status scic_sata_phy_get_properties(
	struct scic_sds_phy *phy,
	struct scic_sata_phy_properties *properties);







#endif  /* _SCIC_PHY_H_ */