linux/drivers/net/ixgb/ixgb.h
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   1/*******************************************************************************
   2
   3  Intel PRO/10GbE Linux driver
   4  Copyright(c) 1999 - 2008 Intel Corporation.
   5
   6  This program is free software; you can redistribute it and/or modify it
   7  under the terms and conditions of the GNU General Public License,
   8  version 2, as published by the Free Software Foundation.
   9
  10  This program is distributed in the hope it will be useful, but WITHOUT
  11  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  more details.
  14
  15  You should have received a copy of the GNU General Public License along with
  16  this program; if not, write to the Free Software Foundation, Inc.,
  17  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19  The full GNU General Public License is included in this distribution in
  20  the file called "COPYING".
  21
  22  Contact Information:
  23  Linux NICS <linux.nics@intel.com>
  24  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27*******************************************************************************/
  28
  29#ifndef _IXGB_H_
  30#define _IXGB_H_
  31
  32#include <linux/stddef.h>
  33#include <linux/module.h>
  34#include <linux/types.h>
  35#include <asm/byteorder.h>
  36#include <linux/init.h>
  37#include <linux/mm.h>
  38#include <linux/errno.h>
  39#include <linux/ioport.h>
  40#include <linux/pci.h>
  41#include <linux/kernel.h>
  42#include <linux/netdevice.h>
  43#include <linux/etherdevice.h>
  44#include <linux/skbuff.h>
  45#include <linux/delay.h>
  46#include <linux/timer.h>
  47#include <linux/slab.h>
  48#include <linux/vmalloc.h>
  49#include <linux/interrupt.h>
  50#include <linux/string.h>
  51#include <linux/pagemap.h>
  52#include <linux/dma-mapping.h>
  53#include <linux/bitops.h>
  54#include <asm/io.h>
  55#include <asm/irq.h>
  56#include <linux/capability.h>
  57#include <linux/in.h>
  58#include <linux/ip.h>
  59#include <linux/tcp.h>
  60#include <linux/udp.h>
  61#include <net/pkt_sched.h>
  62#include <linux/list.h>
  63#include <linux/reboot.h>
  64#include <net/checksum.h>
  65
  66#include <linux/ethtool.h>
  67#include <linux/if_vlan.h>
  68
  69#define BAR_0           0
  70#define BAR_1           1
  71#define BAR_5           5
  72
  73struct ixgb_adapter;
  74#include "ixgb_hw.h"
  75#include "ixgb_ee.h"
  76#include "ixgb_ids.h"
  77
  78#define PFX "ixgb: "
  79
  80#ifdef _DEBUG_DRIVER_
  81#define IXGB_DBG(fmt, args...) printk(KERN_DEBUG PFX fmt, ##args)
  82#else
  83#define IXGB_DBG(fmt, args...)                          \
  84do {                                                    \
  85        if (0)                                          \
  86                printk(KERN_DEBUG PFX fmt, ##args);     \
  87} while (0)
  88#endif
  89
  90/* TX/RX descriptor defines */
  91#define DEFAULT_TXD      256
  92#define MAX_TXD         4096
  93#define MIN_TXD           64
  94
  95/* hardware cannot reliably support more than 512 descriptors owned by
  96 * hardware descriptor cache otherwise an unreliable ring under heavy
  97 * receive load may result */
  98#define DEFAULT_RXD      512
  99#define MAX_RXD          512
 100#define MIN_RXD           64
 101
 102/* Supported Rx Buffer Sizes */
 103#define IXGB_RXBUFFER_2048  2048
 104#define IXGB_RXBUFFER_4096  4096
 105#define IXGB_RXBUFFER_8192  8192
 106#define IXGB_RXBUFFER_16384 16384
 107
 108/* How many Rx Buffers do we bundle into one write to the hardware ? */
 109#define IXGB_RX_BUFFER_WRITE    8       /* Must be power of 2 */
 110
 111/* wrapper around a pointer to a socket buffer,
 112 * so a DMA handle can be stored along with the buffer */
 113struct ixgb_buffer {
 114        struct sk_buff *skb;
 115        dma_addr_t dma;
 116        unsigned long time_stamp;
 117        u16 length;
 118        u16 next_to_watch;
 119        u16 mapped_as_page;
 120};
 121
 122struct ixgb_desc_ring {
 123        /* pointer to the descriptor ring memory */
 124        void *desc;
 125        /* physical address of the descriptor ring */
 126        dma_addr_t dma;
 127        /* length of descriptor ring in bytes */
 128        unsigned int size;
 129        /* number of descriptors in the ring */
 130        unsigned int count;
 131        /* next descriptor to associate a buffer with */
 132        unsigned int next_to_use;
 133        /* next descriptor to check for DD status bit */
 134        unsigned int next_to_clean;
 135        /* array of buffer information structs */
 136        struct ixgb_buffer *buffer_info;
 137};
 138
 139#define IXGB_DESC_UNUSED(R) \
 140        ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
 141        (R)->next_to_clean - (R)->next_to_use - 1)
 142
 143#define IXGB_GET_DESC(R, i, type)       (&(((struct type *)((R).desc))[i]))
 144#define IXGB_RX_DESC(R, i)              IXGB_GET_DESC(R, i, ixgb_rx_desc)
 145#define IXGB_TX_DESC(R, i)              IXGB_GET_DESC(R, i, ixgb_tx_desc)
 146#define IXGB_CONTEXT_DESC(R, i) IXGB_GET_DESC(R, i, ixgb_context_desc)
 147
 148/* board specific private data structure */
 149
 150struct ixgb_adapter {
 151        struct timer_list watchdog_timer;
 152        struct vlan_group *vlgrp;
 153        u32 bd_number;
 154        u32 rx_buffer_len;
 155        u32 part_num;
 156        u16 link_speed;
 157        u16 link_duplex;
 158        struct work_struct tx_timeout_task;
 159
 160        struct timer_list blink_timer;
 161        unsigned long led_status;
 162
 163        /* TX */
 164        struct ixgb_desc_ring tx_ring ____cacheline_aligned_in_smp;
 165        unsigned int restart_queue;
 166        unsigned long timeo_start;
 167        u32 tx_cmd_type;
 168        u64 hw_csum_tx_good;
 169        u64 hw_csum_tx_error;
 170        u32 tx_int_delay;
 171        u32 tx_timeout_count;
 172        bool tx_int_delay_enable;
 173        bool detect_tx_hung;
 174
 175        /* RX */
 176        struct ixgb_desc_ring rx_ring;
 177        u64 hw_csum_rx_error;
 178        u64 hw_csum_rx_good;
 179        u32 rx_int_delay;
 180        bool rx_csum;
 181
 182        /* OS defined structs */
 183        struct napi_struct napi;
 184        struct net_device *netdev;
 185        struct pci_dev *pdev;
 186
 187        /* structs defined in ixgb_hw.h */
 188        struct ixgb_hw hw;
 189        u16 msg_enable;
 190        struct ixgb_hw_stats stats;
 191        u32 alloc_rx_buff_failed;
 192        bool have_msi;
 193        unsigned long flags;
 194};
 195
 196enum ixgb_state_t {
 197        /* TBD
 198        __IXGB_TESTING,
 199        __IXGB_RESETTING,
 200        */
 201        __IXGB_DOWN
 202};
 203
 204/* Exported from other modules */
 205extern void ixgb_check_options(struct ixgb_adapter *adapter);
 206extern void ixgb_set_ethtool_ops(struct net_device *netdev);
 207extern char ixgb_driver_name[];
 208extern const char ixgb_driver_version[];
 209
 210extern int ixgb_up(struct ixgb_adapter *adapter);
 211extern void ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog);
 212extern void ixgb_reset(struct ixgb_adapter *adapter);
 213extern int ixgb_setup_rx_resources(struct ixgb_adapter *adapter);
 214extern int ixgb_setup_tx_resources(struct ixgb_adapter *adapter);
 215extern void ixgb_free_rx_resources(struct ixgb_adapter *adapter);
 216extern void ixgb_free_tx_resources(struct ixgb_adapter *adapter);
 217extern void ixgb_update_stats(struct ixgb_adapter *adapter);
 218
 219
 220#endif /* _IXGB_H_ */
 221
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