cgminer分析

Driver-cpu.c

ipollo_detect 函数里创建线程调用nminer_main,nminer_main中进行了硬件信息初始化，hash board的初始化

，然后进入while循环中接收来自cgminer发过来的消息，在nminer_proc_msg中处理消息（目前没有做任何处理动作，只是回一些序列号，哈希板的数目，芯片数目等信息）。

cgminer和nminer通过环形消息缓冲器（MCP  buffer）去进行通信。

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uint32_t id; char fw_ver[16]; uint8_t mac[8]; /* 6 Bytes */ char sn[32 - 6]; char model[32]; char hwtype[32]; char swtype[32]; uint32_t hboard_cnt; /* Max 8 hboards */ uint32_t hboard_chip_cnt[8]; } __attribute__((__packed__)) MCP_RESP_DETECT_T;

　　

 

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void *nminer_main(void *arg) {     nmlog_set_level(NMLOG_INFO);     nmlog_info("NMiner: task started");     (void)arg;       /* Initialize Hardware */     if (hwinfo_read() != 0) {         nmlog_fatal("Failed to read hardware infomation!");         while (1) {         };         return NULL;     }     hwinfo_show();       /* Detect and check hash-boards and chips */     init_miner();       if (mcp_init() != 0) {         nmlog_fatal("NMiner: MCP init failed, quit!");         while (1) {         };         return NULL;     }       /* endless loop */     while (1) {         /* Proess Message from cgminer */         nminer_proc_msg();           /* Update Info */     }       return NULL; }   #else int main(int argc, char *argv[]) {     nmlog_trace("Hello %s!", "world");     nmlog_debug("Hello %s!", "world");     nmlog_info("Hello %s!", "world");     nmlog_warn("Hello %s!", "world");     nmlog_fatal("Hello %s!", "world");       return 0; } #endif

 

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static void nminer_proc_msg(void) {     switch (mcp_sniff(MCP_CG2NM)) {     case MCP_PKG_NO:         break;     case MCP_CMD_DETECT: {         MCP_CMD_DETECT_T detect;         MCP_RESP_DETECT_T resp;         if (mcp_recv(MCP_NM2CG, (uint8_t *)&detect, sizeof(detect)) != 0) {             nmlog_error("NMiner: MCP receive detect cmd failed");             break;         }         nmlog_info("NMiner: CmdDetect id: 0x%x", detect.id);         resp.id = time(NULL);         // fw_ver         memset(resp.fw_ver, 0, MEMBER_SIZE(MCP_RESP_DETECT_T, fw_ver));         strncpy(resp.fw_ver, fwinfo_ver(), MEMBER_SIZE(MCP_RESP_DETECT_T, fw_ver) - 1);         // mac         *(uint64_t *)(resp.mac) = *(uint64_t *)hwinfo_mac();         // sn         memset(resp.sn, 0, MEMBER_SIZE(MCP_RESP_DETECT_T, sn));         strncpy(resp.sn, hwinfo_sn(), MEMBER_SIZE(MCP_RESP_DETECT_T, sn) - 1);         // model         memset(resp.model, 0, MEMBER_SIZE(MCP_RESP_DETECT_T, model));         strncpy(resp.model, hwinfo_model(), MEMBER_SIZE(MCP_RESP_DETECT_T, model) - 1);         // hwtype         memset(resp.hwtype, 0, MEMBER_SIZE(MCP_RESP_DETECT_T, hwtype));         strncpy(resp.hwtype, hwinfo_hwtype(), MEMBER_SIZE(MCP_RESP_DETECT_T, hwtype) - 1);         // swtype         memset(resp.swtype, 0, MEMBER_SIZE(MCP_RESP_DETECT_T, swtype));         strncpy(resp.swtype, hwinfo_swtype(), MEMBER_SIZE(MCP_RESP_DETECT_T, swtype) - 1);         // hboard_cnt         resp.hboard_cnt = HBOARD_CNT_MAX;         // hboard_chip_cnt         memset(resp.hboard_chip_cnt, 0, sizeof(uint32_t) * ARRAY_SIZE(resp.hboard_chip_cnt));         for (int i = 0; i < (int)resp.hboard_cnt; i++)             resp.hboard_chip_cnt[i] = HBOARD_CHIP_CNT;         if (mcp_resp_detect(&resp) != 0) {             nmlog_error("NMiner: MCP respone detect failed");             break;         }         break;     }     default:         nmlog_error("NMiner: Undefined package received.");         break;     }       return; }

 

 

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1	mcp_sniff去抓取MCP消息类型：MCP_PKG_NO、MCP_CMD_DETECT（命令）、MCP_RESP_DETECT（响应）

 

 

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/* Sniff MCP message type */ MCP_PKG_TYPE_T mcp_sniff(MCP_CHAN_T chan) {     MCP_HEADER_T header;     uint32_t crc;     int recv_ret = mcp_recv_raw(chan, (uint8_t *)&header, sizeof(header));       if (recv_ret == 0) {         return 0;     } else if (recv_ret < 0) {         mcplog_error("NMiner: MCP receive header failed, clear buffer now.");         goto RECV_ERR;     }       crc = crc32(0, (uint8_t *)&(header.ver), sizeof(MCP_HEADER_T) - MEMBER_SIZE(MCP_HEADER_T, crc));     if (crc != header.crc) { /* Receieve wrong header, clear MQ */         mcplog_error("MCP: Wrong header! read: %08x, calc: %08x", header.crc, crc);         goto RECV_ERR;     }     if (header.ver != MCPROTO_VER) {         mcplog_fatal("MCP: header version mismatch!");         goto RECV_ERR;     }       return header.type;   RECV_ERR:     mcp_chan_clear(chan);     return -1; }