diff options
Diffstat (limited to 'qemu/roms/ipxe/src/interface/linux/linux_pci.c')
| -rw-r--r-- | qemu/roms/ipxe/src/interface/linux/linux_pci.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_pci.c b/qemu/roms/ipxe/src/interface/linux/linux_pci.c deleted file mode 100644 index 0c140cb89..000000000 --- a/qemu/roms/ipxe/src/interface/linux/linux_pci.c +++ /dev/null @@ -1,189 +0,0 @@ -/* - * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; 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. - * - * This program 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 program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <stdio.h> -#include <errno.h> -#include <byteswap.h> -#include <linux_api.h> -#include <ipxe/linux.h> -#include <ipxe/pci.h> - -/** @file - * - * iPXE PCI API for Linux - * - */ - -/** - * Open PCI configuration space - * - * @v pci PCI device - * @v flags Access mode flags - * @v where Address within configuration space - * @ret fd File handle, or negative error - */ -static int linux_pci_open ( struct pci_device *pci, int flags, - unsigned long where ) { - char filename[ 22 /* "/proc/bus/pci/xx/xx.x" + NUL */ ]; - int fd; - int rc; - - /* Construct filename */ - snprintf ( filename, sizeof ( filename ), "/proc/bus/pci/%02x/%02x.%x", - PCI_BUS ( pci->busdevfn ), PCI_SLOT ( pci->busdevfn ), - PCI_FUNC ( pci->busdevfn ) ); - - /* Open file */ - fd = linux_open ( filename, flags ); - if ( fd < 0 ) { - DBGC ( pci, "PCI could not open %s: %s\n", filename, - linux_strerror ( linux_errno ) ); - rc = -ELINUX ( linux_errno ); - goto err_open; - } - - /* Seek to location */ - if ( linux_lseek ( fd, where, SEEK_SET ) < 0 ) { - DBGC ( pci, "PCI could not seek to %s offset %#02lx: %s\n", - filename, where, linux_strerror ( linux_errno ) ); - rc = -ELINUX ( linux_errno ); - goto err_seek; - } - - return fd; - - err_seek: - linux_close ( fd ); - err_open: - return rc; -} - -/** - * Read from PCI configuration space - * - * @v pci PCI device - * @v where Address within configuration space - * @v value Data buffer - * @v len Length to read - * @ret rc Return status code - */ -int linux_pci_read ( struct pci_device *pci, unsigned long where, - unsigned long *value, size_t len ) { - uint32_t tmp = 0; - int fd; - int check_len; - int rc; - - /* Return "missing device" in case of error */ - *value = -1UL; - - /* Open configuration space */ - fd = linux_pci_open ( pci, O_RDONLY, where ); - if ( fd < 0 ) { - rc = fd; - goto err_open; - } - - /* Read value */ - check_len = linux_read ( fd, &tmp, len ); - if ( check_len < 0 ) { - DBGC ( pci, "PCI could not read from " PCI_FMT " %#02lx+%#zx: " - "%s\n", PCI_ARGS ( pci ), where, len, - linux_strerror ( linux_errno ) ); - rc = -ELINUX ( linux_errno ); - goto err_read; - } - if ( ( size_t ) check_len != len ) { - DBGC ( pci, "PCI read only %#x bytes from " PCI_FMT - " %#02lx+%#zx\n", check_len, PCI_ARGS ( pci ), - where, len ); - rc = -EIO; - goto err_read; - } - - /* Return value */ - *value = le32_to_cpu ( tmp ); - - /* Success */ - rc = 0; - - err_read: - linux_close ( fd ); - err_open: - return rc; -} - -/** - * Write to PCI configuration space - * - * @v pci PCI device - * @v where Address within configuration space - * @v value Value to write - * @v len Length of value - * @ret rc Return status code - */ -int linux_pci_write ( struct pci_device *pci, unsigned long where, - unsigned long value, size_t len ) { - uint32_t tmp; - int fd; - int check_len; - int rc; - - /* Open configuration space */ - fd = linux_pci_open ( pci, O_WRONLY, where ); - if ( fd < 0 ) { - rc = fd; - goto err_open; - } - - /* Prepare value for writing */ - tmp = cpu_to_le32 ( value ); - assert ( len <= sizeof ( tmp ) ); - - /* Write value */ - check_len = linux_write ( fd, &tmp, len ); - if ( check_len < 0 ) { - DBGC ( pci, "PCI could not write to " PCI_FMT " %#02lx+%#zx: " - "%s\n", PCI_ARGS ( pci ), where, len, - linux_strerror ( linux_errno ) ); - rc = -ELINUX ( linux_errno ); - goto err_write; - } - if ( ( size_t ) check_len != len ) { - DBGC ( pci, "PCI wrote only %#x bytes to " PCI_FMT - " %#02lx+%#zx\n", check_len, PCI_ARGS ( pci ), - where, len ); - rc = -EIO; - goto err_write; - } - - /* Success */ - rc = 0; - - err_write: - linux_close ( fd ); - err_open: - return rc; -} |