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linux/drivers/scsi/isci/phy.h

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/*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* 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
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _ISCI_PHY_H_
#define _ISCI_PHY_H_
#include <scsi/sas.h>
#include <scsi/libsas.h>
#include "state_machine.h"
#include "sas.h"
/* 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_protocol {
SCIC_SDS_PHY_PROTOCOL_UNKNOWN,
SCIC_SDS_PHY_PROTOCOL_SAS,
SCIC_SDS_PHY_PROTOCOL_SATA,
SCIC_SDS_MAX_PHY_PROTOCOLS
};
/**
* 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 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;
/**
* 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;
};
struct isci_phy {
struct scic_sds_phy sci;
struct asd_sas_phy sas_phy;
struct isci_port *isci_port;
u8 sas_addr[SAS_ADDR_SIZE];
union {
struct sas_identify_frame iaf;
struct dev_to_host_fis fis;
} frame_rcvd;
};
static inline struct isci_phy *to_isci_phy(struct asd_sas_phy *sas_phy)
{
struct isci_phy *iphy = container_of(sas_phy, typeof(*iphy), sas_phy);
return iphy;
}
static inline struct isci_phy *sci_phy_to_iphy(struct scic_sds_phy *sci_phy)
{
struct isci_phy *iphy = container_of(sci_phy, typeof(*iphy), sci);
return iphy;
}
struct scic_phy_cap {
union {
struct {
/*
* The SAS specification indicates the start bit shall
* always be set to
* 1. This implementation will have the start bit set
* to 0 if the PHY CAPABILITIES were either not
* received or speed negotiation failed.
*/
u8 start:1;
u8 tx_ssc_type:1;
u8 res1:2;
u8 req_logical_linkrate:4;
u32 gen1_no_ssc:1;
u32 gen1_ssc:1;
u32 gen2_no_ssc:1;
u32 gen2_ssc:1;
u32 gen3_no_ssc:1;
u32 gen3_ssc:1;
u32 res2:17;
u32 parity:1;
};
u32 all;
};
} __packed;
/* this data structure reflects the link layer transmit identification reg */
struct scic_phy_proto {
union {
struct {
u16 _r_a:1;
u16 smp_iport:1;
u16 stp_iport:1;
u16 ssp_iport:1;
u16 _r_b:4;
u16 _r_c:1;
u16 smp_tport:1;
u16 stp_tport:1;
u16 ssp_tport:1;
u16 _r_d:4;
};
u16 all;
};
} __packed;
/**
* 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 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 scic_phy_cap rcvd_cap;
};
/**
* 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
};
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,
/**
* 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,
/**
* 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,
};
/**
* 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))
void scic_sds_phy_construct(
struct scic_sds_phy *this_phy,
struct scic_sds_port *owning_port,
u8 phy_index);
struct scic_sds_port *phy_get_non_dummy_port(struct scic_sds_phy *sci_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);
struct scic_phy_proto;
void scic_sds_phy_get_protocols(
struct scic_sds_phy *sci_phy,
struct scic_phy_proto *protocols);
enum sas_linkrate sci_phy_linkrate(struct scic_sds_phy *sci_phy);
struct isci_host;
void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index);
int isci_phy_control(struct asd_sas_phy *phy, enum phy_func func, void *buf);
#endif /* !defined(_ISCI_PHY_H_) */
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