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到目前为止,我已成功创建保护域,发送和接收队列的完成队列.
但每当我尝试通过调用ib_create_qp来创建队列对时,它都无法创建队列对.我写的代码如下所示：
#include <linux/kernel.h> #include <linux/init.h> #include <linux/module.h> #include <linux/list.h> #include <linux/module.h> #include <linux/err.h> #include "myClient.h" struct workqueue_struct *myClient_workqueue; struct ib_sa_client myClient_sa_client; /* static void myClient_add_one(struct ib_device *devicE); static void myClient_remove_one(struct ib_device *devicE); */ struct ib_pd *mypd; struct ib_cq *myrcvcq; struct ib_cq *myClientsendcq; struct ib_qp *myClientqp; void myClient_ib_recvcompletion(struct ib_cq *cq) { printk("A user-specified callBACk that is invoked when a completion event occurs on the CQ.\n"); } void myClient_ib_sendcompletion(struct ib_cq *cq) { printk("A user-specified callBACk that is invoked when a completion event occurs on the CQ.\n"); } static void my_qp_event_handler(struct ib_event *myqpAsyncEvent,void *anyPointer) { printk(KERN_INFO "Dummy affiliated asynchronous event occured function called \n"); } static void myClient_add_one(struct ib_device *devicE) { union ib_gid tmp_gid; int ret; int hcaport = 1; int result = -ENOMEM; u16 port1Pkey; struct ib_port_attr attr; ret = ib_query_port(device,hcaport,&attr); printk("ib query port result %d \n",ret); // CreaTing the Protection Domain for RDMA mypd = ib_alloc_pd(devicE); if(IS_ERR(mypd)){ printk(KERN_INFO "Failed to allocate PD\n"); return; } else{ printk(KERN_INFO "1successfully allocated the PD\n"); pdset = true; } // CreaTing the receive completion queue for RDMA myrcvcq = ib_create_cq(device,myClient_ib_recvcompletion,NULL,myClient_recvq_size,0); if(IS_ERR(myrcvcq)){ pr_err("%s:%d error code for receive cq%d\n",__func__,__LINE__,PTR_ERR(myrcvcq)); //printk("Error creaTing QP: %d \n",PTR_ERR(myClientqp)); } else{ printk("Recieve CQ successfully created in address: %x \n",myrcvcq); } // CreaTing the send completion queue for RDMA myClientsendcq = ib_create_cq(device,myClient_ib_sendcompletion,myClient_sendq_size,0 ); if(IS_ERR(myClientsendcq)){ pr_err("%s:%d scqerror code for send cq%d\n",PTR_ERR(myClientsendcq)); //printk("Error creaTing QP: %d \n",PTR_ERR(myClientqp)); } else{ printk("1Send CQ successfully created in address: %x \n",myClientsendcq); } // CreaTing the queue pair // CreaTing the queue pair struct ib_qp_init_attr init_qpattr; memset(&init_qpattr,sizeof(init_qpattr)); init_qpattr.event_handler = myClient_qp_event_handler; init_qpattr.cap.max_send_wr = 2; init_qpattr.cap.max_recv_wr = 2; init_qpattr.cap.max_recv_sge = 1; init_qpattr.cap.max_send_sge = 1; init_qpattr.sq_sig_type = IB_SIGNAL_all_WR; init_qpattr.qp_type = IB_QPT_UD; init_qpattr.send_cq = myClientsendcq; init_qpattr.recv_cq = myrcvcq; myClientqp = ib_create_qp(mypd,&init_qpattr); if(IS_ERR(myClientqp)){ pr_err("%s:%d error code %d\n",PTR_ERR(myClientqp)); //printk("Error creaTing QP: %d \n",PTR_ERR(myClientqp)); } else{ printk(KERN_INFO "1The queue pair is successfully created \n"); qpcreated = true; } } static void myClient_remove_one(struct ib_device *devicE) { } static struct ib_client my_client = { .name = "myRDMAclient",.add = myClient_add_one,.remove = myClient_remove_one }; static int __init myRDMAclient_init(void) { int ret; ret = ib_register_client(&my_client); if(ret){ //printk(KERN_ALERT "KERN_ERR Failed to register IB client\n"); goto err_sa; } printk(KERN_ALERT "lKERN_INFO successfully registered myRDMAclient module \n"); return 0; err_sa: return ret; } module_init(myRDMAclient_init);
除了ib_create_qp(mypd,& init_qpattr)之外,所有查询都有效.无法创建队列对.
更新：在创建队列对之前注册了内存.但它仍然显示ib_create_qp的无效参数错误(错误代码-22)
#include <linux/kernel.h> #include <linux/init.h> #include <linux/module.h> #include <linux/list.h> #include <linux/module.h> #include <linux/err.h> #include "myClient.h" struct workqueue_struct *myClient_workqueue; struct ib_sa_client myClient_sa_client; /* static void myClient_add_one(struct ib_device *devicE); static void myClient_remove_one(struct ib_device *devicE); */ struct ib_pd *mypd; struct ib_cq *myrcvcq; struct ib_cq *myClientsendcq; struct ib_qp *myClientqp; struct ib_mr *mymr; void myClient_ib_recvcompletion(struct ib_cq *cq) { printk("A user-specified callBACk that is invoked when a completion event occurs on the CQ.\n"); } void myClient_ib_sendcompletion(struct ib_cq *cq) { printk("A user-specified callBACk that is invoked when a completion event occurs on the CQ.\n"); } static void my_qp_event_handler(struct ib_event *myqpAsyncEvent,ret); // CreaTing the Protection Domain for RDMA mypd = ib_alloc_pd(devicE); if(IS_ERR(mypd)){ printk(KERN_INFO "Failed to allocate PD\n"); return; } else{ printk(KERN_INFO "1successfully allocated the PD\n"); pdset = true; } // Registering Memory mymr = ib_get_dma_mr(mypd,IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_READ| IB_ACCESS_remote_write); if(IS_ERR(mymr)){ printk("Failed to register memory :( %d \n",PTR_ERR(mymr)); }else{ printk(KERN_INFO "successfully registered memory region :) \n"); } // End Registering Memory // CreaTing the receive completion queue for RDMA myrcvcq = ib_create_cq(device,.remove = myClient_remove_one }; static int __init myRDMAclient_init(void) { int ret; ret = ib_register_client(&my_client); if(ret){ //printk(KERN_ALERT "KERN_ERR Failed to register IB client\n"); goto err_sa; } printk(KERN_ALERT "lKERN_INFO successfully registered myRDMAclient module \n"); return 0; err_sa: return ret; } module_init(myRDMAclient_init);
根据以下评论中的讨论,我猜你在当前版本的基础上安装了Mellanox OFED驱动程序.看看Mellanox OFED内核驱动程序的3.1-1.0.3源代码,我看到他们通过添加一些字段来改变struct ib_qp_init_attr的布局.我很确定您的问题是您正在针对原始SLE 3.0.76-0.11内核头文件构建模块,因此传递给create QP函数的init_qpattr结构没有您在右侧设置的值地方.
我不知道你是如何安装新的树外驱动程序的,所以我不能确切地告诉你如何正确地构建你的模块,但你可以尝试添加像
init_qpattr.qpg_type = 0;
到你设置结构的地方. (我知道你已经将整个事情记录为零,但是这将确保你构建的标题具有结构的新qpg_type成员.我认为这是OFED添加的一个新字段,不在你原来的内核头文件,所以如果您的模块编译,那么您正在构建正确的标头)
老答案：
所以我怀疑你遇到了与创建这么小的QP相关的mlx4驱动程序中的错误(max_send_wr == max_recv_wr == 2和max_send_sge == max_recv_sge == 1).我设法找到你正在使用的3.0.76-0.11内核的源代码,不幸的是我没有看到任何明显的错误.
你可以尝试一些帮助调试的东西
>加载模块参数debug_level = 1到mlx4_core模块.使用驱动程序初始化的所有输出更新您的问题(关于“最大CQE：”的一系列行等.mlx4驱动程序中有相当多的逻辑,它依赖于fimrware在初始化期间返回的参数,并且此输出将允许我们看看那是什么.
>就此而言,值得检查一下你的HCA固件是否是最新版本 – 使用更新的固件可能会获得更好的结果(尽管驱动程序应该可以工作,但由于固件缺失,你可能会遇到未经测试的驱动程序代码中的错误触发不同代码路径的功能).
>尝试更新代码以增加这些参数.您可以尝试将max_send_sge和max_recv_sge增加到2,并将max_send_wr和max_recv_wr增加到32或128.(尝试单独增加或组合使用)
>如果你知道如何启用函数跟踪器(This LWN article很有帮助;我假设旧的SLES内核具有所有必需的功能),那么启用mlx4_ib和mlx4_core模块的跟踪,然后加载模块就会很棒.如果使用跟踪更新问题,那么我们可以查看创建QP操作失败的位置 – 例如,它是否在set_rq_size()中失败,到达set_kernel_sq_size()或在其他地方失败？
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