isci: uplevel phy infrastructure
Merge core/scic_sds_phy.[ch] into phy.[ch]
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/phy.h b/drivers/scsi/isci/phy.h
index 3a95adb..093fd47 100644
--- a/drivers/scsi/isci/phy.h
+++ b/drivers/scsi/isci/phy.h
@@ -57,7 +57,105 @@
#include <scsi/sas.h>
#include <scsi/libsas.h>
-#include "scic_sds_phy.h"
+#include "state_machine.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;
+
+ 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;
+
+};
+
struct isci_phy {
struct scic_sds_phy sci;
@@ -85,6 +183,480 @@
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,
+
+ /**
+ * 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,
+};
+
+
+
+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 {
+ /**
+ * 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);
+
+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);