drivers/net/ixgb/ixgb.h

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

  Intel PRO/10GbE Linux driver
  Copyright(c) 1999 - 2008 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 <linux.nics@intel.com>
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

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

#ifndef _IXGB_H_
#define _IXGB_H_

#include <linux/stddef.h>
#include <linux/module.h>
#include <linux/types.h>
#include <asm/byteorder.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/pagemap.h>
#include <linux/dma-mapping.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <linux/capability.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <net/pkt_sched.h>
#include <linux/list.h>
#include <linux/reboot.h>
#include <net/checksum.h>

#include <linux/ethtool.h>
#include <linux/if_vlan.h>

#define BAR_0		0
#define BAR_1		1
#define BAR_5		5

struct ixgb_adapter;
#include "ixgb_hw.h"
#include "ixgb_ee.h"
#include "ixgb_ids.h"

#define PFX "ixgb: "

#ifdef _DEBUG_DRIVER_
#define IXGB_DBG(fmt, args...) printk(KERN_DEBUG PFX fmt, ##args)
#else
#define IXGB_DBG(fmt, args...)				\
do {							\
	if (0)						\
		printk(KERN_DEBUG PFX fmt, ##args);	\
} while (0)
#endif

/* TX/RX descriptor defines */
#define DEFAULT_TXD      256
#define MAX_TXD         4096
#define MIN_TXD           64

/* hardware cannot reliably support more than 512 descriptors owned by
 * hardware descriptor cache otherwise an unreliable ring under heavy
 * receive load may result */
#define DEFAULT_RXD      512
#define MAX_RXD          512
#define MIN_RXD           64

/* Supported Rx Buffer Sizes */
#define IXGB_RXBUFFER_2048  2048
#define IXGB_RXBUFFER_4096  4096
#define IXGB_RXBUFFER_8192  8192
#define IXGB_RXBUFFER_16384 16384

/* How many Rx Buffers do we bundle into one write to the hardware ? */
#define IXGB_RX_BUFFER_WRITE	8	/* Must be power of 2 */

/* wrapper around a pointer to a socket buffer,
 * so a DMA handle can be stored along with the buffer */
struct ixgb_buffer {
	struct sk_buff *skb;
	dma_addr_t dma;
	unsigned long time_stamp;
	u16 length;
	u16 next_to_watch;
	u16 mapped_as_page;
};

struct ixgb_desc_ring {
	/* pointer to the descriptor ring memory */
	void *desc;
	/* physical address of the descriptor ring */
	dma_addr_t dma;
	/* length of descriptor ring in bytes */
	unsigned int size;
	/* number of descriptors in the ring */
	unsigned int count;
	/* next descriptor to associate a buffer with */
	unsigned int next_to_use;
	/* next descriptor to check for DD status bit */
	unsigned int next_to_clean;
	/* array of buffer information structs */
	struct ixgb_buffer *buffer_info;
};

#define IXGB_DESC_UNUSED(R) \
	((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
	(R)->next_to_clean - (R)->next_to_use - 1)

#define IXGB_GET_DESC(R, i, type)	(&(((struct type *)((R).desc))[i]))
#define IXGB_RX_DESC(R, i)		IXGB_GET_DESC(R, i, ixgb_rx_desc)
#define IXGB_TX_DESC(R, i)		IXGB_GET_DESC(R, i, ixgb_tx_desc)
#define IXGB_CONTEXT_DESC(R, i)	IXGB_GET_DESC(R, i, ixgb_context_desc)

/* board specific private data structure */

struct ixgb_adapter {
	struct timer_list watchdog_timer;
	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
	u32 bd_number;
	u32 rx_buffer_len;
	u32 part_num;
	u16 link_speed;
	u16 link_duplex;
	struct work_struct tx_timeout_task;

	/* TX */
	struct ixgb_desc_ring tx_ring ____cacheline_aligned_in_smp;
	unsigned int restart_queue;
	unsigned long timeo_start;
	u32 tx_cmd_type;
	u64 hw_csum_tx_good;
	u64 hw_csum_tx_error;
	u32 tx_int_delay;
	u32 tx_timeout_count;
	bool tx_int_delay_enable;
	bool detect_tx_hung;

	/* RX */
	struct ixgb_desc_ring rx_ring;
	u64 hw_csum_rx_error;
	u64 hw_csum_rx_good;
	u32 rx_int_delay;
	bool rx_csum;

	/* OS defined structs */
	struct napi_struct napi;
	struct net_device *netdev;
	struct pci_dev *pdev;

	/* structs defined in ixgb_hw.h */
	struct ixgb_hw hw;
	u16 msg_enable;
	struct ixgb_hw_stats stats;
	u32 alloc_rx_buff_failed;
	bool have_msi;
	unsigned long flags;
};

enum ixgb_state_t {
	/* TBD
	__IXGB_TESTING,
	__IXGB_RESETTING,
	*/
	__IXGB_DOWN
};

/* Exported from other modules */
extern void ixgb_check_options(struct ixgb_adapter *adapter);
extern void ixgb_set_ethtool_ops(struct net_device *netdev);
extern char ixgb_driver_name[];
extern const char ixgb_driver_version[];

extern int ixgb_up(struct ixgb_adapter *adapter);
extern void ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog);
extern void ixgb_reset(struct ixgb_adapter *adapter);
extern int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
extern int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
extern void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
extern void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
extern void ixgb_update_stats(struct ixgb_adapter *adapter);


#endif /* _IXGB_H_ */