参见图14-2,这是一个典型的NVMe storage的架构图,从图中可以看出需要有admin submission queue以及completion queue, 然后创建IO submission queue 和completion queue。 3)做NVMe Controller Reset,等待Reset完成 参见图15,写偏移14寄存器的Bit0,做NVMe Controller Reset,然后轮询1C寄存器的Bit0,等待status为1,为1表...
nvme reset /dev/nvme1 重置硬盘(NVMe硬盘固件版本进行upgrade/downgrading后要进行reset后才能effective,如果不重置主控需reboot 系统) 4)OP(Over-Provisioning) nvme admin-passthru /dev/nvme0 -o 0x9 --cdw10=0xc1 --cdw11=0x2000000 --cdw12=0x0 OP to GB 1.The decimal value of LBA is (X * 10...
3)做NVMe Controller Reset,等待Reset完成 参见图15,写偏移14寄存器的Bit0,做NVMe Controller Reset,然后轮询1C寄存器的Bit0,等待status为1,为1表明盘侧NVMe reset完成,NVMe Controller Ready。 这一步完成后,主机和盘之间可以通过Admin Queue进行管理消息通信。 图15 4)初始化NVMe字符设备 参见图16-1&2,盘硬件N...
NVME_NVM_SUBSYSTEM_RESET 结构 NVME_POWER_STATE_DESC 结构 NVME_PROTECTION_INFORMATION_TYPES枚举 NVME_PRP_ENTRY联合 NVME_RESERVATION_NOTIFICATION_LOG 结构 NVME_RESERVATION_NOTIFICATION_TYPES 枚举 NVME_SCSI_NAME_STRING结构 NVME_SECURE_ERASE_SETTINGS 枚举 ...
dev_warn(ctrl->device,"resetting controller\n");returnctrl->ops->reset_ctrl(ctrl);caseNVME_IOCTL_SUBSYS_RESET:returnnvme_reset_subsystem(ctrl);caseNVME_IOCTL_RESCAN: nvme_queue_scan(ctrl);return0;default:return-ENOTTY; } } 对于ssd的读写命令,显然是要走 NVME_IOCTL_IO_CMD这一分支,该分支的...
developer:/>reset disk_nvme_feature general DANGER:You are about to reset all feature values that have been set for NVMe disks. This operation may cause the system to be abnormal. Suggestion: Before running this command, note the following: 1. Ensure that this command is run by R&D personne...
developer:/>reset disk_nvme_feature general DANGER:You are about to reset all feature values that have been set for NVMe disks. This operation may cause the system to be abnormal. Suggestion: Before running this command, note the following: 1. Ensure that this command is run by R&D personne...
nvme reset /dev/nvme1 重置硬盘(NVMe硬盘固件版本进行upgrade/downgrading后要进行reset后才能effective,如果不重置主控需reboot 系统) 4)OP(Over-Provisioning) nvme admin-passthru /dev/nvme0 -o 0x9 --cdw10=0xc1 --cdw11=0x2000000 --cdw12=0x0OP to GB1.The decimal value of LBA is (X * 1000...
IO Submission Queues和对应的IO Completion Queues用来处理IO命令,规范定义了一种IO Command Set,叫做NVM Command Set,与IO队列一起使用。系统在创建Submission Queue前必须先创建相关的Completion Queue,同时,删除Submission Queue操作也要先于相关的Completion Queue。 实际上NVMe还有另外一种模式,就是多个提交队列共享同...
NVME_STATUS_FIRMWARE_ACTIVATION_REQUIRES_NVM_SUBSYSTEM_RESET 指示固件提交命令的状态。 NVME_STATUS_FIRMWARE_ACTIVATION_REQUIRES_RESET 指示固件提交命令的以下状态: 固件提交成功,但是,固件映像的激活需要 NVM 子系统重置。 如果在 NVM 子系统重置之前发生任何其他类型的重置,控制器应继续执行当前正在执行的固件映像。