文件:ixgbe_main.c (linux-4.6\drivers\net\ethernet\intel\ixgbe) 4、PCI设备申请存储资源 pci_request_selected_regions 文件:同上 5、申请成总线主DMA模式 pci_set_master,文件同上 6、一般情况下,都是在设备驱动的Probe函数中,完成PCI设备驱动的初始化,以及作为字符设备,块设备,或者网络设备的注册与初始化功能。
虽然调用request_irq()是这里描述的最后一步,但这通常只是初始化设备的另一个中间步骤。 这一步通常可以推迟到设备打开以供使用时。 所有IRQ线的中断处理程序应使用IRQF_SHARED标志注册,并使用devid将IRQ映射到设备(请记住,所有PCI IRQ线都可以共享)。 request_irq()将使用中断号关联中断处理程序和设备句柄。 从历...
目前(2.6.19),驱动程序只能在调用pci_enable_device()后确定MMIO和IO端口资源的可用性。 pci_request_region()的通用风格是request_mem_region()(用于MMIO范围)和request_region()(用于IO端口范围)。对于那些不被 "正常 "PCI BAR描述的地址资源,使用这些方法。也请看下面的pci_request_selected_regions()。 设置...
注册IRQ处理程序(request_irq())初始化non-PCI(即LAN/SCSI/等芯⽚部分)启⽤DMA /处理引擎 当使⽤设备完成时，可能需要卸载模块，驱动程序需要采取以下步骤:禁⽌设备产⽣irq 释放IRQ (free_irq())停⽌所有DMA活动 释放DMA缓冲区(包括流式DMA和⼀致性DMA)从其他⼦系统注销(例如scsi或netdev)释放...
int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask, const char *name) { int request_mask = ((1 << 6) - 1) & ~mask; int rc; rc = pci_request_selected_regions(pdev, request_mask, name); if (rc) return rc; rc = pcim_iomap_regions(pdev, mask, name); if ...
MBregionsofthePCIeaddressspace.Themoduleoccupiesonly32MBoftheAvalon-MMaddressspace,andonlyneedsa25-bitwideaddressbus,leavingspaceforotherAvalon-MMslaves.®SendFeedbackMultiChannelDMAIntelFPGAIPforPCIExpress*DesignExampleUserGuide332.DesignExampleDetailedDescription...
P_REQ is asserted by the bridge to request access to the primary PCI bus as an initiator. Primary system error. Output pulsed from the bridge when enabled through the command register (offset 04h, see Section 4.3) indicating a system error has occurred. The bridge need O not be the ...
For Memory mapped access in single-byte regions, the OXmPCI954 compares the asserted byte-enable with the selected byte-lane in LCC[4:3] and completes the operation if a match occurs, otherwise the access will complete normally on the PCI bus, but it will have no effect on either the ...
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Our brake shim is a thin layer of accessories attached to the back of the brake pads selected through bench tests, mainly for shock absorption and noise reduction. The brake pad material of each vehicle type is different, so the composite material...