Linux中的pci_map_single函数是用来映射单个PCI设备的内存空间到CPU的地址空间中。在Linux系统中,PCI设备是一种常见的外部设备接口,通过PCI总线连接到主机系统,用于扩展计算机的功能。 在Linux内核中,为了访问PCI设备的内存空间,需要将该内存空间映射到主机系统的内存空间中。这样一来,主机系统就可以通过CPU来访问PCI设备...
在系统中有 N 个编码器,可能并不处于同一地理位置;有 M 个解码器,可能并不处于同一地理位置,且 ...
busaddr = pci_map_page(pci_dev, page, offset, len, direction); How is this preferable to: pci_map_single( pci_dev, buffer, len, direction); ? pci_map_single can't handle highmem pages (because they don't have a kernel virtual address) but doesn't virt_to_page suffer from the s...
udp等) netstat -anlp | grep 8003 取文件最后一列求平均值 awk '{a+=$NF;b++}END{prin...
pci_unmap_single(hwdev, phys, size, direction); phys =pci_map_single(hwdev, ptr, size, direction);/* *FIXME:If we get 0 again, we should keep this page, * map another, then free the 0 page. */}returnphys; } 开发者ID:12019,项目名称:kernel_zte_u880,代码行数:23,代码来源:ipath...
Re: [PATCH] x86_64: change _map_single to static in pci_ga... Yinghai LuRe: [PATCH] x86_64: change _map_single to static in p... Andi Kleen Re: [PATCH] x86_64: change _map_single to static ... Yinghai Lu Re: [PATCH] x86_64: change _map_single to sta... Muli Ben-...