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Diffstat (limited to 'src/framework/include/nsfw_ring_data.h')
| -rw-r--r-- | src/framework/include/nsfw_ring_data.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/framework/include/nsfw_ring_data.h b/src/framework/include/nsfw_ring_data.h new file mode 100644 index 0000000..cafffe0 --- /dev/null +++ b/src/framework/include/nsfw_ring_data.h @@ -0,0 +1,99 @@ +/* +* +* Copyright (c) 2018 Huawei Technologies Co.,Ltd. +* Licensed under the Apache License, Version 2.0 (the "License"); +* you may not use this file except in compliance with the License. +* You may obtain a copy of the License at: +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ + +#ifndef _NSFW_RING_DATA_H_ +#define _NSFW_RING_DATA_H_ + +#include <stdint.h> +#include "types.h" + +#define VALUE_LEN 40 + +/* +Ring Data has two part; Ver&Data +val is a pointer offset base on rtp_perf_ring::Addrbase, this struct support 1TB, it's enough now; +future __int128 maybe used, this type can perfectly solve the version & address rang problem. +*/ +union RingData_U +{ + struct RingData_S + { + /* + value of data, indeed it's a pointer offset base on rtp_perf_ring::Addrbase;40bit is enough for user space addr + ver must using 24bit, so val using 40bit; a CAS now just support 64bit; in future, we may using __int128,now __int128 not support well. + */ + volatile unsigned long long val:VALUE_LEN; + /* + version of data, using 16b store version flg is more suitable for Address save, but using 16b version is too short, it's value range is [0-65535]; + between two cpu schedule time (TM-SPACE) of one process/thread, other processes/threads do N times queue oper. if N > 65535, still have a chance of ABA. + if using a 24bit save version flg, if ABA happened, 16777216 times queue oper need done in one TM-SPACE, it's impossible for today cpu. + */ + volatile unsigned long long ver:(64 - VALUE_LEN); + } data_s; + u64 data_l; +}; + +/* + this high perf Ring rely on the init value of Ring Slot; + Ring Must init using PerfRingInit, Pool Must init using PerfPoolInit + + the addrbase is base addr for all element; now we support 1024G offset; + for nstack the Ring element is from hugepage, and the addr is in stack space. + + 1. not support a ring who's element space range bigger than 1024GB + [if one element from heep, one from stack, range will bigger than 1024GB, we not support] + 2. one more thing addr from mmap is in stack + 3. rtp_perf_ring must create by rtp_perf_ring_create/rtp_perf_pool_create +*/ +struct nsfw_mem_ring +{ + u8 memtype; //shared, no shared + u8 ringflag; //scmp, scsp, mcsp,mcmp + u16 overflow_count; //reserv data + u32 size; //size of the Ring, must 2^n + u32 eltsize; //for sppool, it is the size of per buf, if is ring, eltsize is zero. + u32 mask; //mask of the Ring, used mask mod Head/Tail to get real pos, must 2^n-1 + void *Addrbase; /*Cause the Addr we support just 40b(1024G), we using a basAddr+offset to get the real addr; ring[x].data_s.val just store offset; + * not used when no shared mode + */ + volatile u32_t prodhflag; //for nshmem fork recover + volatile u32_t prodtflag; //for nshmem fork recover + volatile u32_t conshflag; //for nshmem fork recover + volatile u32_t constflag; //for nshmem fork recover + nsfw_res res_chk; + + struct + { + volatile u32 head; //Head of the Ring, used to indicat pos where to pull a val + volatile u32 tail; //for nshmem, shmem not used. + } prod; + struct + { + volatile u32 head; //for nshmem, shmem not used. + volatile u32 tail; //Tail of the Ring, used to indicat pos where to push a val + } cons; + struct timeval overflow_time; + + union RingData_U ring[0]; //Value of Ring + +}; + +#define PERFRING_ADDR_RANGE (0xFFFFFFFFFFL) +#define PERFRING_HEAD_INCRASE_MASK (0x03) + +#define PERFRING_HEAD_INCRASE_VALUE (PERFRING_HEAD_INCRASE_MASK+1) + +#endif /*_NSFW_RING_DATA_H_*/ |