!3198 udma: add dfx ability of dca for hns3

Merge Pull Request from: @zhaoweibo3 
 
driver inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8LNL9


CVE: NA

[Content]
This patch supports the function of querying the current DCA memory usage
status through debugfs. After the DCA function is enabled, the UDMA driver
creates a subdirectory named xxx PID for each DCA process in debug directory.
Each xxx PID directory contains the mstats and tp files. The tp file records
the memory usage of the SQ, SGE, and RQ corresponding to all TPs in the process.
The mstats file records the memory usage of the DCA memory pool.

Signed-off-by: Jiahao Zhang <zhangjiahao14@huawei.com>
 
Link:https://gitee.com/openeuler/kernel/pulls/3198

 

Reviewed-by: Chunzhi Hu <huchunzhi@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>