pcie passthrough

This paper mainly through the WindRiver tool graphical view PCIe device, to understand the space structure of PCIE devices. This article mainly refers to the "PCI Express Architecture Guide" and the Netizen blog: Click to open the link.I. The space structure of PCIE equipmentPCIe devices have three separate physical address spaces: device memory space (memory), I

About PCIe non-transparent bridge cache consistencyThe PCIe non-transparent bridge provides two mechanisms for migrating data from local node to remote node, respectively, based on address mapping and embeddedDma. For remote nodes, the CPU may not be aware when it accepts data, so cache consistency needs to be ensured;On the local node, when the data is transferred to its own memory via DMA, the CPU is not

Platform: x86 saiyang e3400 Kernel version: Linux 3.2.1 #11 SMP sun Nov 2 13:27:52 CST 2014 i686 i686 i386 GNU/Linux Function: enumerate the following PCIe devices, where 8111 is the PCIE-PCI bridge, the uplink port is the PCIe port, and the downlink port is the PCI port. . 0 0604: 10b5: 8111 (Rev 21)0:04. 0 0680: 10b5: 86e1 (Rev aa) The source code is as follow

: · One is a software-initiated data request (for example, by a read function call), and the other is the hardware that asynchronously passes data to the system. For data acquisition equipment, even if there is no process to read the data, but also write constantly, waiting for the process to call, so the driver should maintain a ring buffer, when the read call can always return to the user space needed data. 7. How to initiate an interrupt request to the CPU in

PCIe Nic schematic, with Act (flash) configured with led0 pins, and link 1000 m configured with led3 100000000001000 = 0x4008 // LZM: 2011/8/6/*PCIe Nic schematic, with Act (flash) configured with led0 pins, and link 1000 m configured with led3 100000000001000 = 0x4008*/Static void rtl8168_customized_leds (struct rtl8168_private * TP){Void _ iomem * ioaddr = TP-> mmio_addr;Printk ("----- _ lin

, configuration mechanism #1 is the only option to access the PCI configuration space. The RW software can read the mcfg base address: Figure 1 At the same time, we can also see the value of b0d2f0's register: Figure 2 then, based on the base address f8000000 and b0d2f0, according to The PCIe cofigration space address specification, we can get the address f8010000. We can read it through Dumphys to change the physical address value: The value read in

Many of the available NIC drivers have actually been installed during the installation of Gnu/linux, but this one:Realtek PCIe GBE Family ControllerBut not the driver.And my desktop: the HP HP Pro 3380 MT is just using this NIC. Because there is no network, and centos6.x did not pre-installed gcc,g++ compilation environment, really toss a long time.The following summarizes the installation process:installation of a CentOS system1 Create an image file

In this paper, we mainly introduce the loading and unloading process of a typical kmdf driver with the TraceView.exe tool. The related theory mainly comes from "Win7 Device driver Program development" book. For the use of TraceView.exe, please refer to my previous blog: Click to open the link.First, start and load orderIn section 7.2 of Win7 device driver development, "enumeration and startup of devices", it is mentioned that in order to prepare the device, Kmdf invokes the driver's callback rou

The speed of each PCIe standard is as follows: Version Release Date Original data transmission bandwidth Valid bandwidth Single lane bandwidth Total Bandwidth (x16) Pcie1.x 2003 2.5gt/s 2 Gbps 250 MB/S 8 Gb/s Pcie2.x 2007 5.0gt/s 4 Gbps 500 MB/S 16 Gb/s Pcie3.0 2010 8.0gt/s 8 Gbps 1 Gb/s 32 Gb/s After compa

Tags: htm embedded detail Linux SYN Stat management cache. NetHTTP://BLOG.CSDN.NET/LIKEPING/ARTICLE/DETAILS/42235111 DMA management under LinuxHTTP://BLOG.CSDN.NET/SKYFLYING2012/ARTICLE/DETAILS/48023447 Cache and memory consistency.Http://www.360doc.com/content/16/0510/07/478627_557742072.shtmlHTTP://LYL19.BLOG.163.COM/BLOG/STATIC/1942720552013310103745840/DMA Memeryhttp://blog.csdn.net/cywosp/article/details/8767327 SYN SynchronizationEmbedded development hi3519---The

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