isci: fixup SAS iaf protocols data structure

[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / isci / core / scic_sds_phy.h

/*
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#ifndef _SCIC_SDS_PHY_H_
#define _SCIC_SDS_PHY_H_

#include "intel_sas.h"
#include "scic_phy.h"
#include "scu_registers.h"
#include "sci_base_state_machine.h"
#include <scsi/libsas.h>

struct scic_sds_port;
/**
 *
 *
 * This is the timeout value for the SATA phy to wait for a SIGNATURE FIS
 * before restarting the starting state machine.  Technically, the old parallel
 * ATA specification required up to 30 seconds for a device to issue its
 * signature FIS as a result of a soft reset.  Now we see that devices respond
 * generally within 15 seconds, but we'll use 25 for now.
 */
#define SCIC_SDS_SIGNATURE_FIS_TIMEOUT    25000

/**
 *
 *
 * This is the timeout for the SATA OOB/SN because the hardware does not
 * recognize a hot plug after OOB signal but before the SN signals.  We need to
 * make sure after a hotplug timeout if we have not received the speed event
 * notification from the hardware that we restart the hardware OOB state
 * machine.
 */
#define SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT  250

enum scic_sds_phy_states {
        /**
         * Simply the initial state for the base domain state machine.
         */
        SCI_BASE_PHY_STATE_INITIAL,

        /**
         * This state indicates that the phy has successfully been stopped.
         * In this state no new IO operations are permitted on this phy.
         * This state is entered from the INITIAL state.
         * This state is entered from the STARTING state.
         * This state is entered from the READY state.
         * This state is entered from the RESETTING state.
         */
        SCI_BASE_PHY_STATE_STOPPED,

        /**
         * This state indicates that the phy is in the process of becomming
         * ready.  In this state no new IO operations are permitted on this phy.
         * This state is entered from the STOPPED state.
         * This state is entered from the READY state.
         * This state is entered from the RESETTING state.
         */
        SCI_BASE_PHY_STATE_STARTING,

        /**
         * This state indicates the the phy is now ready.  Thus, the user
         * is able to perform IO operations utilizing this phy as long as it
         * is currently part of a valid port.
         * This state is entered from the STARTING state.
         */
        SCI_BASE_PHY_STATE_READY,

        /**
         * This state indicates that the phy is in the process of being reset.
         * In this state no new IO operations are permitted on this phy.
         * This state is entered from the READY state.
         */
        SCI_BASE_PHY_STATE_RESETTING,

        /**
         * Simply the final state for the base phy state machine.
         */
        SCI_BASE_PHY_STATE_FINAL,
};


/**
 * enum scic_sds_phy_starting_substates -
 *
 *
 */
enum scic_sds_phy_starting_substates {
        /**
         * Initial state
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL,

        /**
         * Wait state for the hardware OSSP event type notification
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN,

        /**
         * Wait state for the PHY speed notification
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN,

        /**
         * Wait state for the IAF Unsolicited frame notification
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF,

        /**
         * Wait state for the request to consume power
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER,

        /**
         * Wait state for request to consume power
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER,

        /**
         * Wait state for the SATA PHY notification
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN,

        /**
         * Wait for the SATA PHY speed notification
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN,

        /**
         * Wait state for the SIGNATURE FIS unsolicited frame notification
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF,

        /**
         * Exit state for this state machine
         */
        SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL,
};

struct scic_sds_port;
struct scic_sds_controller;

/**
 * This enumeration provides a named phy type for the state machine
 *
 *
 */
enum scic_sds_phy_protocol {
        /**
         * This is an unknown phy type since there is either nothing on the other
         * end or we have not detected the phy type as yet.
         */
        SCIC_SDS_PHY_PROTOCOL_UNKNOWN,

        /**
         * This is a SAS PHY
         */
        SCIC_SDS_PHY_PROTOCOL_SAS,

        /**
         * This is a SATA PHY
         */
        SCIC_SDS_PHY_PROTOCOL_SATA,

        SCIC_SDS_MAX_PHY_PROTOCOLS
};

struct isci_phy;
/**
 * struct scic_sds_phy - This structure  contains or references all of the data
 *    necessary to represent the core phy object and SCU harware protocol
 *    engine.
 *
 *
 */
struct scic_sds_phy {
        /**
         * This field depicts the peer object for the phy.
         */
        struct isci_phy *iphy;

        /**
         * This field contains the information for the base phy state machine.
         */
        struct sci_base_state_machine state_machine;

        /**
         * This field specifies the port object that owns/contains this phy.
         */
        struct scic_sds_port *owning_port;

        /**
         * This field indicates whether the phy supports 1.5 Gb/s, 3.0 Gb/s,
         * or 6.0 Gb/s operation.
         */
        enum sas_linkrate max_negotiated_speed;

        /**
         * This member specifies the protocol being utilized on this phy.  This
         * field contains a legitamite value once the PHY has link trained with
         * a remote phy.
         */
        enum scic_sds_phy_protocol protocol;

        /**
         * This field specifies the index with which this phy is associated (0-3).
         */
        u8 phy_index;

        /**
         * This member indicates if this particular PHY has received a BCN while
         * it had no port assignement.  This BCN will be reported once the phy is
         * assigned to a port.
         */
        bool bcn_received_while_port_unassigned;

        /**
         * This field indicates if this PHY is currently in the process of
         * link training (i.e. it has started OOB, but has yet to perform
         * IAF exchange/Signature FIS reception).
         */
        bool is_in_link_training;

        /**
         * This field contains a reference to the timer utilized in detecting
         * when a signature FIS timeout has occurred.  The signature FIS is the
         * first FIS sent by an attached SATA device after OOB/SN.
         */
        void *sata_timeout_timer;

        const struct scic_sds_phy_state_handler *state_handlers;

        struct sci_base_state_machine starting_substate_machine;

        /**
         * This field is the pointer to the transport layer register for the SCU
         * hardware.
         */
        struct scu_transport_layer_registers __iomem *transport_layer_registers;

        /**
         * This field points to the link layer register set within the SCU.
         */
        struct scu_link_layer_registers __iomem *link_layer_registers;

};

typedef enum sci_status (*scic_sds_phy_handler_t)(struct scic_sds_phy *);
typedef enum sci_status (*scic_sds_phy_event_handler_t)(struct scic_sds_phy *, u32);
typedef enum sci_status (*scic_sds_phy_frame_handler_t)(struct scic_sds_phy *, u32);
typedef enum sci_status (*scic_sds_phy_power_handler_t)(struct scic_sds_phy *);

/**
 * struct scic_sds_phy_state_handler -
 *
 *
 */
struct scic_sds_phy_state_handler {
        /**
         * The start_handler specifies the method invoked when there is an
         * attempt to start a phy.
         */
        scic_sds_phy_handler_t start_handler;

        /**
         * The stop_handler specifies the method invoked when there is an
         * attempt to stop a phy.
         */
        scic_sds_phy_handler_t stop_handler;

        /**
         * The reset_handler specifies the method invoked when there is an
         * attempt to reset a phy.
         */
        scic_sds_phy_handler_t reset_handler;

        /**
         * The destruct_handler specifies the method invoked when attempting to
         * destruct a phy.
         */
        scic_sds_phy_handler_t destruct_handler;

        /**
         * The state handler for unsolicited frames received from the SCU hardware.
         */
        scic_sds_phy_frame_handler_t frame_handler;

        /**
         * The state handler for events received from the SCU hardware.
         */
        scic_sds_phy_event_handler_t event_handler;

        /**
         * The state handler for staggered spinup.
         */
        scic_sds_phy_power_handler_t consume_power_handler;

};

/**
 * scic_sds_phy_get_index() -
 *
 * This macro returns the phy index for the specified phy
 */
#define scic_sds_phy_get_index(phy) \
        ((phy)->phy_index)

/**
 * scic_sds_phy_get_controller() - This macro returns the controller for this
 *    phy
 *
 *
 */
#define scic_sds_phy_get_controller(phy) \
        (scic_sds_port_get_controller((phy)->owning_port))

/**
 * scic_sds_phy_set_state_handlers() - This macro sets the state handlers for
 *    this phy object
 *
 *
 */
#define scic_sds_phy_set_state_handlers(phy, handlers) \
        ((phy)->state_handlers = (handlers))

/**
 * scic_sds_phy_set_base_state_handlers() -
 *
 * This macro set the base state handlers for the phy object.
 */
#define scic_sds_phy_set_base_state_handlers(phy, state_id) \
        scic_sds_phy_set_state_handlers(\
                (phy), \
                &scic_sds_phy_state_handler_table[(state_id)] \
                )

void scic_sds_phy_construct(
        struct scic_sds_phy *this_phy,
        struct scic_sds_port *owning_port,
        u8 phy_index);

struct scic_sds_port *scic_sds_phy_get_port(
        struct scic_sds_phy *this_phy);

void scic_sds_phy_set_port(
        struct scic_sds_phy *this_phy,
        struct scic_sds_port *owning_port);

enum sci_status scic_sds_phy_initialize(
        struct scic_sds_phy *this_phy,
        struct scu_transport_layer_registers __iomem *transport_layer_registers,
        struct scu_link_layer_registers __iomem *link_layer_registers);

enum sci_status scic_sds_phy_start(
        struct scic_sds_phy *this_phy);

enum sci_status scic_sds_phy_stop(
        struct scic_sds_phy *this_phy);

enum sci_status scic_sds_phy_reset(
        struct scic_sds_phy *this_phy);

void scic_sds_phy_resume(
        struct scic_sds_phy *this_phy);

void scic_sds_phy_setup_transport(
        struct scic_sds_phy *this_phy,
        u32 device_id);

enum sci_status scic_sds_phy_event_handler(
        struct scic_sds_phy *this_phy,
        u32 event_code);

enum sci_status scic_sds_phy_frame_handler(
        struct scic_sds_phy *this_phy,
        u32 frame_index);

enum sci_status scic_sds_phy_consume_power_handler(
        struct scic_sds_phy *this_phy);

void scic_sds_phy_get_sas_address(
        struct scic_sds_phy *this_phy,
        struct sci_sas_address *sas_address);

void scic_sds_phy_get_attached_sas_address(
        struct scic_sds_phy *this_phy,
        struct sci_sas_address *sas_address);

void scic_sds_phy_get_protocols(
        struct scic_sds_phy *sci_phy,
        struct scic_phy_proto *protocols);

#endif /* _SCIC_SDS_PHY_H_ */