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master
src/drivers/net/skeleton.c
261 строка
6 KB
Michael Brown
[pci] Update drivers to use pci_ioremap()
25 сен 2020, 16:17
25 сен 2020, 16:17
eecb75b
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/* * Copyright (C) 2012 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 <stdint.h> #include <string.h> #include <unistd.h> #include <errno.h> #include <byteswap.h> #include <ipxe/netdevice.h> #include <ipxe/ethernet.h> #include <ipxe/if_ether.h> #include <ipxe/iobuf.h> #include <ipxe/malloc.h> #include <ipxe/pci.h> #include "skeleton.h" /** @file * * Skeleton network driver * */ /****************************************************************************** * * Device reset * ****************************************************************************** */ /** * Reset hardware * * @v skel Skeleton device * @ret rc Return status code */ static int skeleton_reset ( struct skeleton_nic *skel ) { DBGC ( skel, "SKELETON %p does not yet support reset\n", skel ); return -ENOTSUP; } /****************************************************************************** * * Link state * ****************************************************************************** */ /** * Check link state * * @v netdev Network device */ static void skeleton_check_link ( struct net_device *netdev ) { struct skeleton_nic *skel = netdev->priv; DBGC ( skel, "SKELETON %p does not yet support link state\n", skel ); netdev_link_err ( netdev, -ENOTSUP ); } /****************************************************************************** * * Network device interface * ****************************************************************************** */ /** * Open network device * * @v netdev Network device * @ret rc Return status code */ static int skeleton_open ( struct net_device *netdev ) { struct skeleton_nic *skel = netdev->priv; DBGC ( skel, "SKELETON %p does not yet support open\n", skel ); return -ENOTSUP; } /** * Close network device * * @v netdev Network device */ static void skeleton_close ( struct net_device *netdev ) { struct skeleton_nic *skel = netdev->priv; DBGC ( skel, "SKELETON %p does not yet support close\n", skel ); } /** * Transmit packet * * @v netdev Network device * @v iobuf I/O buffer * @ret rc Return status code */ static int skeleton_transmit ( struct net_device *netdev, struct io_buffer *iobuf ) { struct skeleton_nic *skel = netdev->priv; DBGC ( skel, "SKELETON %p does not yet support transmit\n", skel ); ( void ) iobuf; return -ENOTSUP; } /** * Poll for completed and received packets * * @v netdev Network device */ static void skeleton_poll ( struct net_device *netdev ) { struct skeleton_nic *skel = netdev->priv; /* Not yet implemented */ ( void ) skel; } /** * Enable or disable interrupts * * @v netdev Network device * @v enable Interrupts should be enabled */ static void skeleton_irq ( struct net_device *netdev, int enable ) { struct skeleton_nic *skel = netdev->priv; DBGC ( skel, "SKELETON %p does not yet support interrupts\n", skel ); ( void ) enable; } /** Skeleton network device operations */ static struct net_device_operations skeleton_operations = { .open = skeleton_open, .close = skeleton_close, .transmit = skeleton_transmit, .poll = skeleton_poll, .irq = skeleton_irq, }; /****************************************************************************** * * PCI interface * ****************************************************************************** */ /** * Probe PCI device * * @v pci PCI device * @ret rc Return status code */ static int skeleton_probe ( struct pci_device *pci ) { struct net_device *netdev; struct skeleton_nic *skel; int rc; /* Allocate and initialise net device */ netdev = alloc_etherdev ( sizeof ( *skel ) ); if ( ! netdev ) { rc = -ENOMEM; goto err_alloc; } netdev_init ( netdev, &skeleton_operations ); skel = netdev->priv; pci_set_drvdata ( pci, netdev ); netdev->dev = &pci->dev; memset ( skel, 0, sizeof ( *skel ) ); /* Fix up PCI device */ adjust_pci_device ( pci ); /* Map registers */ skel->regs = pci_ioremap ( pci, pci->membase, SKELETON_BAR_SIZE ); if ( ! skel->regs ) { rc = -ENODEV; goto err_ioremap; } /* Reset the NIC */ if ( ( rc = skeleton_reset ( skel ) ) != 0 ) goto err_reset; /* Register network device */ if ( ( rc = register_netdev ( netdev ) ) != 0 ) goto err_register_netdev; /* Set initial link state */ skeleton_check_link ( netdev ); return 0; unregister_netdev ( netdev ); err_register_netdev: skeleton_reset ( skel ); err_reset: iounmap ( skel->regs ); err_ioremap: netdev_nullify ( netdev ); netdev_put ( netdev ); err_alloc: return rc; } /** * Remove PCI device * * @v pci PCI device */ static void skeleton_remove ( struct pci_device *pci ) { struct net_device *netdev = pci_get_drvdata ( pci ); struct skeleton_nic *skel = netdev->priv; /* Unregister network device */ unregister_netdev ( netdev ); /* Reset card */ skeleton_reset ( skel ); /* Free network device */ iounmap ( skel->regs ); netdev_nullify ( netdev ); netdev_put ( netdev ); } /** Skeleton PCI device IDs */ static struct pci_device_id skeleton_nics[] = { PCI_ROM ( 0x5ce1, 0x5ce1, "skel", "Skeleton", 0 ), }; /** Skeleton PCI driver */ struct pci_driver skeleton_driver __pci_driver = { .ids = skeleton_nics, .id_count = ( sizeof ( skeleton_nics ) / sizeof ( skeleton_nics[0] ) ), .probe = skeleton_probe, .remove = skeleton_remove, };