4 General. 4.1 Architecture. T10/ revision 4

Transcription

1 T0/ revision 4 Date: 9/3/04 To: T0 Committee (SCSI) From: George Penokie (IBM/Tivoli) Subject: SAS UML Corrections 4 General 4. Architecture 4.. Architecture overview. SAS UML Corrections 24

2 T0/ revision 4 Figure 6 shows the class diagram for a SAS domain, showing the relationships between SAS domain, SCSI domain, service delivery subsystem, expander device, expander port, SAS device, SCSI device, SAS port, SCSI port, and phy classes. Relationships to ATA classes (e.g., ATA domain) are not shown in figure 6. SCSI domain SAS domain Service delivery subsystem..* SCSI device SCSI device name..* SCSI port SCSI port identifier Note: See SAM-3 for more details on SCSI domain, SCSI device, and SCSI port...* SAS device..* 0..* SAS port [] Attached [] Expander device [] Expander port Attached []..28 Phy..* (device scope) [] SAS Address SAS Address SMP Port Target [] Initiator [0..] Manages Figure 6 SAS domain class diagram 4..2 Physical links and phys Figure 7 expands the phy class showing the relationships between the following classes: a) phy; b) SAS phy; c) SAS phy; 25 SAS UML Corrections

3 d) SAS initiator phy; e) SAS target phy; f) SSP phy; g) STP phy; h) SMP phy; and i) expander phy. SATA phys are also referenced in this standard but are defined by SATA (see ATA/ATAPI-7 V3). Phy Type = virtual, physical T0/ revision 4 SAS phy Expander phy SAS target phy Protocol = SSP, STP, SMP STP phy Role = initiator, target SAS initiator phy Protocol = SSP, STP, SMP SSP phy Role = initiator, target Figure 7 Phy classes SMP phy Role = initiator, target Figure 8 shows the objects that are instances of the: a) SAS phy class (i.e., SSP initiator phy, SSP target phy, virtual SSP target phy, virtual SSP initiator phy, STP initiator phy, STP target phy, virtual STP target phy, virtual STP initiator phy, SMP initiator phy, SMP target phy, virtual SMP target phy, and virtual SMP virtual initiator phy); and b) expander phy class (i.e., expander phy and virtual expander phy). The objects of the SAS phy class shown in figure 8 are only valid and unchangeable during a connection. A different object may be used on a different connection. SAS UML Corrections 26

4 T0/ revision 4 Valid objects for the expander phy class Expander phy : Expander phy Virtual expander phy : Expander phy Type = Virtual Valid objects for the SAS phy class SSP initiator phy : SAS phy Role = initiator Protocol = SSP STP initiator phy : SAS phy Role = initiator Protocol = STP SMP initiator phy : SAS phy Role = initiator Protocol = SMP SSP target phy : SAS phy Role = target Protocol = SSP STP target phy : SAS phy Role = target Protocol = STP SMP target phy : SAS phy Role = target Protocol = SMP Virtual SMP initiator phy : SAS phy Type = virtual Role = initiator Protocol = SMP Virtual SMP target phy : SAS phy Type = virtual Role = target Protocol = SMP Virtual STP initiator phy : SAS phy Type = virtual Role = initiator Protocol = STP Virtual STP target phy : SAS phy Type = virtual Role = target Protocol = STP Virtual SSP initiator phy : SAS phy Type = virtual Role = initiator Protocol = SSP Virtual SSP target phy : SAS phy Type = virtual Role = target Protocol = SSP 4..3 Ports (narrow ports and wide ports) Figure 8 Phy objects 27 SAS UML Corrections

5 T0/ revision 4 Figure 9 expands the port class and expander class to show the relationships between the following classes: a) port; b) expander device; c) expander port; d) SAS port; e) SAS target port; f) SAS initiator port; g) STP port; h) SSP port; and i) SMP port. Port Expander Device [] SAS addess SAS addess Expander port SAS port [] Attached [] SAS target port Protocol[] = SSP, STP, SMP SAS initiator port Protocol[] = SSP, STP, SMP {There shall be at least one target attribute or one initiator attribute per phy contained within each instance of a port} STP port Target[0..28] Initiator[0..28] Connection() SMP port Target[0..28] Initiator[0..28] Connection() SSP port Target[0..] Initiator[0..] Connection() SMP port Target[] Initiator[0..] {There shall be at least one target attribute or one initiator attribute within each instance of the SSP port} {The number of connection operation requests shall be no greater than the number of phys contained within the port for each instance of a port} Figure 9 Port classes Figure 0 shows the objects that are instances of the: a) SAS target port class (i.e., SSP target port, STP target port, SMP target port); SAS UML Corrections 28

6 T0/ revision 4 b) SAS initiator port class (i.e., SSP initiator port, STP initiator port, SMP initiator port); c) STP port class (i.e., STP initiator port, STP target port, STP port); d) SMP port class (i.e., SMP initiator port, SMP target port, SMP port); e) SSP port class (i.e., SSP initiator port, SSP target port, SSP port); f) expander device SMP port class (i.e., SMP target port, SMP port); and g) expander port class (i.e., expander port). The objects of the SAS port class are shown in figure 0. A different object may be used on a different connection. Valid objects for the SAS target port class SSP target port : SAS target port Attached Protocol = SSP STP target port : SAS target port Attached Protocol = STP SMP target port : SAS target port Attached Protocol = SMP Valid objects for the SAS initiator port class SSP initiator port : SAS initiator port Attached Protocol = SSP STP initiator port : SAS initiator port Attached Protocol = STP SMP initiator port : SAS initiator port Attached Protocol = SMP Valid objects for the expander device SMP port class SMP target port : SMP port Target SMP port : SMP port Target Initiator Valid object for the expander port class Expander port : Expander port Attached Examples of valid objects for the STP port class STP target port : STP port Attached Target = x Target = y STP initiator port : STP port Attached Initiator STP port : STP port Attached Target = x Target = y Initiator = z Examples of valid objects for the SMP port class SMP target port : SMP port Attached Target SMP initiator port : SMP port Attached Initiator = x Initiator = y SMP port : SMP port Attached Target = a Target = b Initiator = c Initiator = d Valid objects for the SSP port class SSP target port : SSP port Attached Target SSP initiator port : SSP port Attached Initiator SSP port : SSP port Attached Initiator Target Figure 0 Port objects 29 SAS UML Corrections

7 T0/ revision SAS devices 4..5 Expander devices (edge expander devices and fanout expander devices) Figure shows the expander device classes. Expander device Edge expander device..28 Edge expander device set attaches to Fanout expander device attaches to 0.. {one or the other but not both} Figure Expander device classes 4..6 Service delivery subsystem Domains 4..8 Expander device topologies Expander device topology overview Edge expander device set Expander device topologies Pathways SAS UML Corrections 30

8 T0/ revision Connections 4.2 Names and identifiers 4.2. Names and identifiers overview es Hashed Device names Port names Port identifiers s 3 SAS UML Corrections

9 T0/ revision State machines 4.3. State machine overview Figure 2 shows the state machines for SAS devices, their relationships to each other and to the SAS device, SAS port, and SAS phy. SAS device SCSI application layer (SA) ATA application layer (AA) Management application layer (MA) SAS port SSP transport layer (ST) STP transport layer (TT) SMP transport layer (MT) Port layer (PL) SAS phy SSP link layer (SSP) STP link layer (STP) SAS Port Control (PC) SAS Port Control (PC) SMP link layer (SMP) Link layer (SL) Phy layer (SP) One or more SAS phys (with matching number of TTs and MTs) per SAS port One or more SAS ports per SAS device Figure 2 State machines for SAS devices SAS UML Corrections 32

10 T0/ revision 4 Figure 3 shows the state machines for expander devices, their relationships to each other and to the expander device, expander port, and expander phy. Expander function state machines are not defined in this standard, but the interface to the expander function is defined in Expander device External expander port External expander phy Expander link layer (XL) External expander port External expander phy Expander link layer (XL) Phy layer (SP) Expander function Phy layer (SP) One or more expander phys per expander port One or more expander phys per expander port One or more expander ports per expander device One or more expander ports per expander device Figure 3 State machines for expander devices Annex I contains a list of messages between state machines Transmit data path 33 SAS UML Corrections

11 T0/ revision State machines and SAS device, SAS port, and SAS phy objects Figure 4 shows which state machines are contained within the SAS device, SAS port, and SAS phy classes. SAS device..* Application layer SA_PC state machine[] state machine[0..*] SAS port The definition of the state machine attribute is outside the scope of this standard. Transport layer TT state machine[0..28] ST state machine[0..] = ST_I, ST_T MT state machine[0..28] = MT_IP, MT_IT..* Port layer OC state machine[] PM state machine[0..28] {At least one state machine attribute shall be present in each instance of the transport layer class.} SAS phy Link layer SL state machine[0..] SL_IR state machine[0..] SSP state machine[0..] STP state machine[0..] SMP state machine[0..] Phy layer SP state machine[] SP_DWS state machine[] {In each instance of the link layer class at least one of the SSP state machine, STP state machine, or SMP state machine attributes shall be present.} Figure 4 State machine and SAS device, SAS port, and SAS phy classes SAS UML Corrections 34

12 T0/ revision 4 Figure 5 shows which state machines are contained within the expander device, expander port, and expander phy classes. Expander device Expander function expander connection manager[] expander connection router[] broadcast primitive processor[] The definition of state machines relating to the expander connection manager, expander connection router, and broadcast primitive processor attributes are outside the scope of this standard. 2..* Expander port..* Expander phy Expander Link layer SL_IR state machine[] XL state machine[] Phy layer SP state machine[] SP_DWS state machine[] Figure 5 State machine and expander device, expander port, and expander phy classes 35 SAS UML Corrections