08/28/2024, 07:24 AM UTC
理解PCIe 6.0中14-bit标签的必要性Understanding the Need for 14-bit Tags in PCIe 6.0
➀ PCIe TLP中的标签是特定非发布请求的标识符,确保请求和完成之间的一致性。 ➁ 随着PCIe速度的提升,标签大小从8位增加到14位,以优化性能。 ➂ PCIe 6.0要求在更高速度下运行的功能必须具备特定的标签大小能力。 ➃ 详细介绍了标签大小的配置寄存器,14位标签在设备3扩展能力结构中有独特的设置。 ➄ 标签大小启用组合决定了最大标签大小和允许的标签值范围。➀ Tags in PCIe TLPs are identifiers for non-posted requests, ensuring consistency between requests and completions. ➁ As PCIe speeds increase, tag size has expanded from 8-bit to 14-bit to optimize performance. ➂ PCIe 6.0 mandates specific tag size capabilities for functions operating at higher speeds. ➃ Configuration registers for tag sizes are detailed, with 14-bit tags having unique settings in the Device 3 Extended Capability Structure. ➄ Combinations of tag size enablement determine the maximum tag size and permissible tag value ranges.
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