kcompat.c

82546千兆网卡驱动程序,支持该系列所有芯片

/*******************************************************************************

  Intel PRO/1000 Linux driver
  Copyright(c) 1999 - 2006 Intel Corporation.
  
  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.
  
  This program is distributed in the hope 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 St - Fifth Floor, Boston, MA 02110-1301 USA.
  
  The full GNU General Public License is included in this distribution in
  the file called "COPYING".
  
  Contact Information:
  Linux NICS <[e-mail]>
  e1000-devel Mailing List <[e-mail]>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

#include "kcompat.h"

/*****************************************************************************/
/* 2.4.13 => 2.4.3 */
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,4,13) )

/**************************************/
/* PCI DMA MAPPING */

#if defined(CONFIG_HIGHMEM)

#ifndef PCI_DRAM_OFFSET
#define PCI_DRAM_OFFSET 0
#endif

u64 _kc_pci_map_page(struct pci_dev *dev, struct page *page, unsigned long offset, size_t size, int direction)
{
	return (((u64)(page - mem_map) << PAGE_SHIFT) + offset + PCI_DRAM_OFFSET);
}

#else /* CONFIG_HIGHMEM */

u64 _kc_pci_map_page(struct pci_dev *dev, struct page *page, unsigned long offset, size_t size, int direction)
{
	return pci_map_single(dev, (void *)page_address(page) + offset, size, direction);
}

#endif /* CONFIG_HIGHMEM */

void _kc_pci_unmap_page(struct pci_dev *dev, u64 dma_addr, size_t size, int direction)
{
	return pci_unmap_single(dev, dma_addr, size, direction);
}

#endif /* 2.4.13 => 2.4.3 */


/*****************************************************************************/
/* 2.4.3 => 2.4.0 */
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,4,3) )

/**************************************/
/* PCI DRIVER API */

int _kc_pci_set_dma_mask(struct pci_dev *dev, dma_addr_t mask)
{
	if (!pci_dma_supported(dev, mask))
		return -EIO;
	dev->dma_mask = mask;
	return 0;
}

int _kc_pci_request_regions(struct pci_dev *dev, char *res_name)
{
	int i;

	for (i = 0; i < 6; i++) {
		if (pci_resource_len(dev, i) == 0)
			continue;

		if (pci_resource_flags(dev, i) & IORESOURCE_IO) {
			if (!request_region(pci_resource_start(dev, i), pci_resource_len(dev, i), res_name)) {
				pci_release_regions(dev);
				return -EBUSY;
			}
		} else if (pci_resource_flags(dev, i) & IORESOURCE_MEM) {
			if (!request_mem_region(pci_resource_start(dev, i), pci_resource_len(dev, i), res_name)) {
				pci_release_regions(dev);
				return -EBUSY;
			}
		}
	}
	return 0;
}

void _kc_pci_release_regions(struct pci_dev *dev)
{
	int i;

	for (i = 0; i < 6; i++) {
		if (pci_resource_len(dev, i) == 0)
			continue;

		if (pci_resource_flags(dev, i) & IORESOURCE_IO)
			release_region(pci_resource_start(dev, i), pci_resource_len(dev, i));

		else if (pci_resource_flags(dev, i) & IORESOURCE_MEM)
			release_mem_region(pci_resource_start(dev, i), pci_resource_len(dev, i));
	}
}

/**************************************/
/* NETWORK DRIVER API */

struct net_device * _kc_alloc_etherdev(int sizeof_priv)
{
	struct net_device *dev;
	int alloc_size;

	alloc_size = sizeof (*dev) + sizeof_priv + IFNAMSIZ + 31;

	dev = kmalloc(alloc_size, GFP_KERNEL);

	if (!dev) return NULL;

	memset(dev, 0, alloc_size);

	if (sizeof_priv)
		dev->priv = (void *) (((unsigned long)(dev + 1) + 31) & ~31);

	dev->name[0] = '\0';

	ether_setup(dev);

	return dev;
}

int _kc_is_valid_ether_addr(u8 *addr)
{
	const char zaddr[6] = {0,};

	return !(addr[0]&1) && memcmp( addr, zaddr, 6);
}

#endif /* 2.4.3 => 2.4.0 */


/*****************************************************************************/
/* 2.4.6 => 2.4.3 */
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,4,6) )

int _kc_pci_set_power_state(struct pci_dev *dev, int state)
{ return 0; }
int _kc_pci_save_state(struct pci_dev *dev, u32 *buffer)
{ return 0; }
int _kc_pci_restore_state(struct pci_dev *pdev, u32 *buffer)
{ return 0; }
int _kc_pci_enable_wake(struct pci_dev *pdev, u32 state, int enable)
{ return 0; }

#endif /* 2.4.6 => 2.4.3 */

/*****************************************************************************/
/* 2.6.0 => 2.4.6 */
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) )
void _kc_skb_fill_page_desc(struct sk_buff *skb, int i, struct page *page, int off, int size)
{
	skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
	frag->page = page;
	frag->page_offset = off;
	frag->size = size;
	skb_shinfo(skb)->nr_frags = i + 1;
}
#endif /* 2.6.0 => 2.4.6 */

#if ( LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,17) )
struct sk_buff *_kc_netdev_alloc_skb(struct net_device *dev,
                                     unsigned int length)
{
	/* 16 == NET_PAD_SKB */
	struct sk_buff *skb;
	skb = alloc_skb(length + 16, GFP_ATOMIC);
	if (likely(skb != NULL))
		skb_reserve(skb, 16);
	return skb;
}
#endif /* <= 2.6.17 */