IABSD.fr/xenocara/lib/libpciaccess/src/openbsd_pci.c

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• Author : matthieu
  Date : 2007-06-06 21:01:25
  Hash : 64125c3e
  Message : skeleton OpenBSD port of libpciaccess

• lib/libpciaccess/src/openbsd_pci.c

• /* $OpenBSD: openbsd_pci.c,v 1.1 2007/06/06 21:01:25 matthieu Exp $ */
  /*
   * (C) Copyright Eric Anholt 2006
   * (C) Copyright IBM Corporation 2006
   * All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * on the rights to use, copy, modify, merge, publish, distribute, sub
   * license, and/or sell copies of the Software, and to permit persons to whom
   * the Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
   * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   */
  
  /**
   * \file openbsd_pci.c
   *
   * Access the kernel PCI support using /dev/pci's ioctl and mmap interface.
   *
   * \author Eric Anholt <eric@anholt.net>
   */
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include <unistd.h>
  #include <fcntl.h>
  #include <errno.h>
  #include <sys/types.h>
  #include <sys/pciio.h>
  #include <sys/mman.h>
  
  #include "pciaccess.h"
  #include "pciaccess_private.h"
  
  /**
   * OpenBSD private pci_system structure that extends the base pci_system
   * structure.
   *
   * It is initialized once and used as a global, just as pci_system is used.
   */
  struct openbsd_pci_system {
  	struct pci_system pci_sys; /* must come first */
  	int pcidev;		/**< fd for /dev/pci */
  } *openbsd_pci_sys;
  
  /**
   * Map a memory region for a device using /dev/mem.
   *
   * \param dev          Device whose memory region is to be mapped.
   * \param region       Region, on the range [0, 5], that is to be mapped.
   * \param write_enable Map for writing (non-zero).
   *
   * \return
   * Zero on success or an \c errno value on failure.
   */
  static int
  pci_device_openbsd_map(struct pci_device *dev, unsigned int region,
      int write_enable)
  {
  }
  
  /**
   * Unmap the specified region.
   *
   * \param dev          Device whose memory region is to be unmapped.
   * \param region       Region, on the range [0, 5], that is to be unmapped.
   *
   * \return
   * Zero on success or an \c errno value on failure.
   */
  static int
  pci_device_openbsd_unmap(struct pci_device *dev, unsigned int region)
  {
  }
  
  static int
  pci_device_openbsd_read(struct pci_device *dev, void *data,
      pciaddr_t offset, pciaddr_t size, pciaddr_t *bytes_read)
  {
  }
  
  static int
  pci_device_openbsd_write(struct pci_device *dev, const void *data,
      pciaddr_t offset, pciaddr_t size, pciaddr_t *bytes_written)
  {
  }
  
  
  static int
  pci_device_openbsd_probe(struct pci_device *dev)
  {
  }
  
  static int
  pci_device_openbsd_read_rom(struct pci_device *dev, void *buffer)
  {
  }
  
  
  static void
  pci_system_openbsd_destroy(void)
  {
  	free(openbsd_pci_sys->pci_sys.devices);
  	openbsd_pci_sys = NULL;
  }
  
  static const struct pci_system_methods openbsd_pci_methods = {
  	.destroy = pci_system_openbsd_destroy,
  	.destroy_device = NULL,
  	.read_rom = pci_device_openbsd_read_rom, 
  	.probe = pci_device_openbsd_probe,
  	.map = pci_device_openbsd_map,
  	.unmap = pci_device_openbsd_unmap,
  	.read = pci_device_openbsd_read,
  	.write = pci_device_openbsd_write,
  	.fill_capabilities = pci_fill_capabilities_generic,
  };
  
  /**
   * Attempt to acces the OpenBSD PCI interface.
   */
  int
  pci_system_openbsd_create(void)
  {
  	openbsd_pci_sys = calloc(1, sizeof(struct openbsd_pci_system));
  	if (openbsd_pci_sys = NULL)
  		return ENOMEM;
  	pci_sys = &openbsd_pci_sys->pci_sys;
  	pci_sys->methods = &openbsd_pci_methods;
  	
  	return 0;
  }