Lsi SAS3041E Manual de usuario descargar pdf (Pagina 19)

PCI Performance 1-5

• Contains a replay buffer that preserves a copy of the data for

retransmission in case a CRC error occurs

• Supports the PCI Express Advanced Error Reporting capabilities

• Uses a packetized and layered architecture

• Achieves a high bandwidth per pin with low overhead and low latency

• PCI Express is software compatible with PCI and PCI-X software

– Leverages existing PCI device drivers

– Supports the Memory, I/O, and Conﬁguration address spaces

– Supports memory read/write transactions, I/O read/write

transactions, and conﬁguration read/write transactions

• Provides 4 Kbytes of PCI Conﬁguration address space per device

• Supports posted and non-posted transactions

• Provides quality of service (QOS) link conﬁguration and arbitration

policies

• Supports Trafﬁc Class 0 and one virtual channel

• Supports Message Signaled Interrupts (both MSI and MSI-X) as well

as INTx interrupt signaling for legacy PCI support

• Supports end-to-end CRC (ECRC) and Advanced Error Reporting

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Lsi SAS3041E Manual de usuario Pagina 19