[https][tls][crypto] Intel QAT卡初涉

硬件加密卡，硬件加解密卡。

用于把加密解密，数据压缩等，从CPU卸载到加速卡上。

所有文档汇总：https://01.org/intel-quickassist-technology

性能调优手册：https://01.org/sites/default/files/downloads//330687qatperformanceoptimizationguiderev007us.pdf

三种编程模型：interrupt mode， polling mode，epoll mode

intel推荐polling mode

简单的一些管理方法，备忘

[root@tong ~]# lspci |grep QAT
05:00.0 Co-processor: Intel Corporation DH895XCC Series QAT
[root@tong ~]# ls /sys/kernel/debug/qat_dh895xcc_0000\:05\:00.0/
cnv_errors  dev_cfg  fw_counters  heartbeat  heartbeat_failed  heartbeat_sent  transport  version
[root@tong ~]# cat /sys/kernel/debug/qat_dh895xcc_0000\:05\:00.0/fw_counters 
+------------------------------------------------+
| FW Statistics for Qat Device                   |
+------------------------------------------------+
| Firmware Requests [AE  0]:            27465873 |
| Firmware Responses[AE  0]:            27465873 |
+------------------------------------------------+
... ...

更多

https://github.com/intel/asynch_mode_nginx