Hello Alexey, On 01/19/2015 03:22 PM, Alexey Ishchuk wrote: > Add s390_pci_mmio_write.2 manual page for the new PCI MMIO memory access > s390_pci_mmio_write () and s390_pci_mmio_read () system calls added for > the s390 platform. I've applied this patch. I made a few tweaks to the text, and hopefully I did not inject any errors. Could you please check the version below. One question: do I understand correctly that mmio_addr is a physical address? Maybe we should say mention that in the page. Cheers, Michael .\" Copyright (c) IBM Corp. 2015 .\" Author: Alexey Ishchuk <aishchuk@xxxxxxxxxxxxxxxxxx> .\" .\" %%%LICENSE_START(GPLv2+_DOC_FULL) .\" This is free documentation; you can redistribute it and/or .\" modify it under the terms of the GNU General Public License as .\" published by the Free Software Foundation; either version 2 of .\" the License, or (at your option) any later version. .\" .\" The GNU General Public License's references to "object code" .\" and "executables" are to be interpreted as the output of any .\" document formatting or typesetting system, including .\" intermediate and printed output. .\" .\" This manual is distributed in the hope that it will be useful, .\" but WITHOUT ANY WARRANTY; without even the implied warranty of .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the .\" GNU General Public License for more details. .\" .\" You should have received a copy of the GNU General Public .\" License along with this manual; if not, see .\" <http://www.gnu.org/licenses/>. .\" %%%LICENSE_END .\" .TH S390_PCI_MMIO_WRITE 2 2015-01-15 "Linux Programmer's Manual" .SH NAME s390_pci_mmio_write, s390_pci_mmio_read \- transfer data to/from PCI MMIO memory page .SH SYNOPSIS .nf .B #include <asm/unistd.h> .BI "int s390_pci_mmio_write(unsigned long " mmio_addr ", .BI " void *" user_buffer ", size_t " length "); .br .BI "int s390_pci_mmio_read(unsigned long " mmio_addr ", .BI " void *" user_buffer ", size_t " length "); .fi .SH DESCRIPTION The .BR s390_pci_mmio_write () system call writes .IR length bytes of data from the user-space buffer .IR user_buffer to the PCI MMIO memory location specified by .IR mmio_addr . The .BR s390_pci_mmio_read () system call reads .I length bytes of data from the PCI MMIO memory location specified by .IR mmio_addr to the user-space buffer .IR user_buffer . These system calls must be used instead of the simple assignment or data-transfer operations that are used to access the PCI MMIO memory areas mapped to user space on the Linux System z platform. The address specified by .IR mmio_addr must belong to a PCI MMIO memory page mapping in the caller's address space, and the data being written or read must not cross a page boundary. The .IR length value cannot be greater than the system page size. .SH RETURN VALUE On success, .BR s390_pci_mmio_write () and .BR s390_pci_mmio_read () return 0. On error, \-1 is returned and .IR errno is set to one of the error codes listed below. .SH ERRORS .TP .B EFAULT The address in .I mmio_addr is invalid. .TP .B EFAULT .IR user_buffer does not point to a valid location in the caller's address space. .TP .B EINVAL Invalid .I length argument. .TP .B ENODEV PCI support is not enabled. .TP .B ENOMEM Insufficient memory. .SH VERSIONS These system calls are available since Linux 3.19. .SH CONFORMING TO This Linux-specific system call is available only on the s390 architecture. The required PCI support is available beginning with System z EC12. .SH NOTES Glibc does not provide a wrapper for this system call, use .BR syscall (2) to call it. .SH SEE ALSO .BR syscall (2) -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
