pci

问题 I'd like to have a library that allows 'self profiling' of critical sections of Linux executables. In the same way that one can time a section using gettimeofday() or RDTSC I'd like to be able to count events such as branch misses and cache hits. There are a number of tools that do similar things (perf, PAPI, likwid) but I haven't found anything that matches what I'm looking for. Likwid comes closest, so I'm mostly looking at ways to modify it's existing Marker API. The per-core counters are

问题 In Ethernet PCI device driver if the driver allows applications to map user-space buffer to Driver virtual memory and allow the user to call MMAP on device driver file after opening it. Then how do implement MMAP in the PCI ETHERNET Network device driver? I have already looked in the dev_pci struct. There are some members that are named as they have something to do with MMAP but I could not pinpoint how to make a device driver implement MMAP. In the book Linux Device Driver, the author did

问题 In Ethernet PCI device driver if the driver allows applications to map user-space buffer to Driver virtual memory and allow the user to call MMAP on device driver file after opening it. Then how do implement MMAP in the PCI ETHERNET Network device driver? I have already looked in the dev_pci struct. There are some members that are named as they have something to do with MMAP but I could not pinpoint how to make a device driver implement MMAP. In the book Linux Device Driver, the author did

问题 In Ethernet PCI device driver if the driver allows applications to map user-space buffer to Driver virtual memory and allow the user to call MMAP on device driver file after opening it. Then how do implement MMAP in the PCI ETHERNET Network device driver? I have already looked in the dev_pci struct. There are some members that are named as they have something to do with MMAP but I could not pinpoint how to make a device driver implement MMAP. In the book Linux Device Driver, the author did

问题 I am trying to rescan PCI bus in my own kernel driver with the help of pci_rescan_bus() kernel function but I do not see it is functioning same. If I try to do same from user space by running following command, I see that rescanning happens: echo 1 > /sys/devices/pci0000:00/0000:00:14.1/rescan I am trying to re-initialize my ethernet ports which sit on PCI bus. Below is the code I am using for now: struct pci_dev *pci_eth_dev01, *pci_eth_dev02 = NULL; pci_eth_dev01 = pci_get_device(0x10ec,

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 months ago . Improve this question I'm trying to understand how PCI segment(domain) is related to multiple Host Bridges? Some people say multiple PCI domains corresponds to multiple Host Bridges, but some say it means multiple Root Bridges under a single Host Bridge. I'm confused and I don't find

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 months ago . Improve this question I'm trying to understand how PCI segment(domain) is related to multiple Host Bridges? Some people say multiple PCI domains corresponds to multiple Host Bridges, but some say it means multiple Root Bridges under a single Host Bridge. I'm confused and I don't find

问题 Does Each PCI peripheral function (from Linux Device Driver -- Book Each PCI periphel is identified by a bus number, a device number, and a function number. ) specified as a pci driver data? (Question: is net_device a driver function in pci_dev as a network function ) as assigning in net_device dev pci_dev pdev .... .... pci_set_drvdata (pdev, dev); the above code is present in Linux's RealTek Ethernet driver's pci device driver's probe function from https://github.com/torvalds/linux/blob

问题 I'm migrating my PCI driver from iokit to dext using PCIDriverkit. I download the "MyUserUSBInterfaceDriver" sample, modify compile, sign, and run. the dext can load, but there are many errors: kernel: serviceMatchesCDHash: required cdhash 3...3 in personality does not match service kernel: DK: IOUserServer(sc.knight.MyUserUSBInterfaceDriver-0x1000064ac)::exit(CDHash check failed) kernel: (above:This error Repeat 5 times) ............ ............ ............ ............ ............ ......

问题 On the driver side, pci_register_driver() is called when a driver module is loaded, or at boot time if the module is built-in. (Whenever a device/driver is added, driver/device list is looped to find a match, I get that part.) But where/when are pci devices discovered and registered with the bus? I imagine this is arch specific, and would involve BIOS on x86, such as - BIOS routine probe PCI devices and then put the results in a list some where in RAM, before loading the kernel, and each list