Release 4.11 drivers/scsi/isci/port.h
/*
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*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* it under the terms of version 2 of the GNU General Public License as
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* in the file called LICENSE.GPL.
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _ISCI_PORT_H_
#define _ISCI_PORT_H_
#include <scsi/libsas.h>
#include "isci.h"
#include "sas.h"
#include "phy.h"
#define SCIC_SDS_DUMMY_PORT 0xFF
#define PF_NOTIFY (1 << 0)
#define PF_RESUME (1 << 1)
struct isci_phy;
struct isci_host;
enum isci_status {
isci_freed = 0x00,
isci_starting = 0x01,
isci_ready = 0x02,
isci_ready_for_io = 0x03,
isci_stopping = 0x04,
isci_stopped = 0x05,
};
/**
* struct isci_port - isci direct attached sas port object
* @ready_exit: several states constitute 'ready'. When exiting ready we
* need to take extra port-teardown actions that are
* skipped when exiting to another 'ready' state.
* @logical_port_index: software port index
* @physical_port_index: hardware port index
* @active_phy_mask: identifies phy members
* @enabled_phy_mask: phy mask for the port
* that are already part of the port
* @reserved_tag:
* @reserved_rni: reserver for port task scheduler workaround
* @started_request_count: reference count for outstanding commands
* @not_ready_reason: set during state transitions and notified
* @timer: timeout start/stop operations
*/
struct isci_port {
struct isci_host *isci_host;
struct list_head remote_dev_list;
#define IPORT_RESET_PENDING 0
unsigned long state;
enum sci_status hard_reset_status;
struct sci_base_state_machine sm;
bool ready_exit;
u8 logical_port_index;
u8 physical_port_index;
u8 active_phy_mask;
u8 enabled_phy_mask;
u8 last_active_phy;
u16 reserved_rni;
u16 reserved_tag;
u32 started_request_count;
u32 assigned_device_count;
u32 hang_detect_users;
u32 not_ready_reason;
struct isci_phy *phy_table[SCI_MAX_PHYS];
struct isci_host *owning_controller;
struct sci_timer timer;
struct scu_port_task_scheduler_registers __iomem *port_task_scheduler_registers;
/* XXX rework: only one register, no need to replicate per-port */
u32 __iomem *port_pe_configuration_register;
struct scu_viit_entry __iomem *viit_registers;
};
enum sci_port_not_ready_reason_code {
SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS,
SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED,
SCIC_PORT_NOT_READY_INVALID_PORT_CONFIGURATION,
SCIC_PORT_NOT_READY_RECONFIGURING,
SCIC_PORT_NOT_READY_REASON_CODE_MAX
};
struct sci_port_end_point_properties {
struct sci_sas_address sas_address;
struct sci_phy_proto protocols;
};
struct sci_port_properties {
u32 index;
struct sci_port_end_point_properties local;
struct sci_port_end_point_properties remote;
u32 phy_mask;
};
/**
* enum sci_port_states - port state machine states
* @SCI_PORT_STOPPED: port has successfully been stopped. In this state
* no new IO operations are permitted. This state is
* entered from the STOPPING state.
* @SCI_PORT_STOPPING: port is in the process of stopping. In this
* state no new IO operations are permitted, but
* existing IO operations are allowed to complete.
* This state is entered from the READY state.
* @SCI_PORT_READY: port is now ready. Thus, the user is able to
* perform IO operations on this port. This state is
* entered from the STARTING state.
* @SCI_PORT_SUB_WAITING: port is started and ready but has no active
* phys.
* @SCI_PORT_SUB_OPERATIONAL: port is started and ready and there is at
* least one phy operational.
* @SCI_PORT_SUB_CONFIGURING: port is started and there was an
* add/remove phy event. This state is only
* used in Automatic Port Configuration Mode
* (APC)
* @SCI_PORT_RESETTING: port is in the process of performing a hard
* reset. Thus, the user is unable to perform IO
* operations on this port. This state is entered
* from the READY state.
* @SCI_PORT_FAILED: port has failed a reset request. This state is
* entered when a port reset request times out. This
* state is entered from the RESETTING state.
*/
#define PORT_STATES {\
C(PORT_STOPPED),\
C(PORT_STOPPING),\
C(PORT_READY),\
C(PORT_SUB_WAITING),\
C(PORT_SUB_OPERATIONAL),\
C(PORT_SUB_CONFIGURING),\
C(PORT_RESETTING),\
C(PORT_FAILED),\
}
#undef C
#define C(a) SCI_##a
enum sci_port_states PORT_STATES;
#undef C
static inline void sci_port_decrement_request_count(struct isci_port *iport)
{
if (WARN_ONCE(iport->started_request_count == 0,
"%s: tried to decrement started_request_count past 0!?",
__func__))
/* pass */;
else
iport->started_request_count--;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dan J Williams | 35 | 100.00% | 3 | 100.00% |
| Total | 35 | 100.00% | 3 | 100.00% |
#define sci_port_active_phy(port, phy) \
(((port)->active_phy_mask & (1 << (phy)->phy_index)) != 0)
void sci_port_construct(
struct isci_port *iport,
u8 port_index,
struct isci_host *ihost);
enum sci_status sci_port_start(struct isci_port *iport);
enum sci_status sci_port_stop(struct isci_port *iport);
enum sci_status sci_port_add_phy(
struct isci_port *iport,
struct isci_phy *iphy);
enum sci_status sci_port_remove_phy(
struct isci_port *iport,
struct isci_phy *iphy);
void sci_port_setup_transports(
struct isci_port *iport,
u32 device_id);
void isci_port_bcn_enable(struct isci_host *, struct isci_port *);
void sci_port_deactivate_phy(
struct isci_port *iport,
struct isci_phy *iphy,
bool do_notify_user);
bool sci_port_link_detected(
struct isci_port *iport,
struct isci_phy *iphy);
enum sci_status sci_port_get_properties(
struct isci_port *iport,
struct sci_port_properties *prop);
enum sci_status sci_port_link_up(struct isci_port *iport,
struct isci_phy *iphy);
enum sci_status sci_port_link_down(struct isci_port *iport,
struct isci_phy *iphy);
struct isci_request;
struct isci_remote_device;
enum sci_status sci_port_start_io(
struct isci_port *iport,
struct isci_remote_device *idev,
struct isci_request *ireq);
enum sci_status sci_port_complete_io(
struct isci_port *iport,
struct isci_remote_device *idev,
struct isci_request *ireq);
enum sas_linkrate sci_port_get_max_allowed_speed(
struct isci_port *iport);
void sci_port_broadcast_change_received(
struct isci_port *iport,
struct isci_phy *iphy);
bool sci_port_is_valid_phy_assignment(
struct isci_port *iport,
u32 phy_index);
void sci_port_get_sas_address(
struct isci_port *iport,
struct sci_sas_address *sas_address);
void sci_port_get_attached_sas_address(
struct isci_port *iport,
struct sci_sas_address *sas_address);
void sci_port_set_hang_detection_timeout(
struct isci_port *isci_port,
u32 timeout);
void isci_port_formed(struct asd_sas_phy *);
void isci_port_deformed(struct asd_sas_phy *);
int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
struct isci_phy *iphy);
int isci_ata_check_ready(struct domain_device *dev);
#endif /* !defined(_ISCI_PORT_H_) */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dan J Williams | 525 | 85.23% | 17 | 58.62% |
| Jeff Skirvin | 30 | 4.87% | 3 | 10.34% |
| Piotr Sawicki | 21 | 3.41% | 4 | 13.79% |
| Bartek Nowakowski | 15 | 2.44% | 1 | 3.45% |
| Marcin Tomczak | 12 | 1.95% | 1 | 3.45% |
| Dave Jiang | 9 | 1.46% | 1 | 3.45% |
| Edmund Nadolski | 4 | 0.65% | 2 | 6.90% |
| Total | 616 | 100.00% | 29 | 100.00% |
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