drivers/net/ixgbe/ixgbe.h

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2007 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 _IXGBE_H_
  30 #define _IXGBE_H_
  31
  32 #include <linux/types.h>
  33 #include <linux/pci.h>
  34 #include <linux/netdevice.h>
  35
  36 #include "ixgbe_type.h"
  37 #include "ixgbe_common.h"
  38
  39
  40 #define IXGBE_ERR(args...) printk(KERN_ERR "ixgbe: " args)
  41
  42 #define PFX "ixgbe: "
  43 #define DPRINTK(nlevel, klevel, fmt, args...) \
  44         ((void)((NETIF_MSG_##nlevel & adapter->msg_enable) && \
  45         printk(KERN_##klevel PFX "%s: %s: " fmt, adapter->netdev->name, \
  46                 __FUNCTION__ , ## args)))
  47
  48 /* TX/RX descriptor defines */
  49 #define IXGBE_DEFAULT_TXD                  1024
  50 #define IXGBE_MAX_TXD                      4096
  51 #define IXGBE_MIN_TXD                        64
  52
  53 #define IXGBE_DEFAULT_RXD                  1024
  54 #define IXGBE_MAX_RXD                      4096
  55 #define IXGBE_MIN_RXD                        64
  56
  57 #define IXGBE_DEFAULT_RXQ                          1
  58 #define IXGBE_MAX_RXQ                              1
  59 #define IXGBE_MIN_RXQ                              1
  60
  61 #define IXGBE_DEFAULT_ITR_RX_USECS          125  /*   8k irqs/sec */
  62 #define IXGBE_DEFAULT_ITR_TX_USECS          250  /*   4k irqs/sec */
  63 #define IXGBE_MIN_ITR_USECS                 100  /* 500k irqs/sec */
  64 #define IXGBE_MAX_ITR_USECS               10000  /* 100  irqs/sec */
  65
  66 /* flow control */
  67 #define IXGBE_DEFAULT_FCRTL             0x10000
  68 #define IXGBE_MIN_FCRTL                       0
  69 #define IXGBE_MAX_FCRTL                 0x7FF80
  70 #define IXGBE_DEFAULT_FCRTH             0x20000
  71 #define IXGBE_MIN_FCRTH                       0
  72 #define IXGBE_MAX_FCRTH                 0x7FFF0
  73 #define IXGBE_DEFAULT_FCPAUSE            0x6800  /* may be too long */
  74 #define IXGBE_MIN_FCPAUSE                     0
  75 #define IXGBE_MAX_FCPAUSE                0xFFFF
  76
  77 /* Supported Rx Buffer Sizes */
  78 #define IXGBE_RXBUFFER_64    64     /* Used for packet split */
  79 #define IXGBE_RXBUFFER_128   128    /* Used for packet split */
  80 #define IXGBE_RXBUFFER_256   256    /* Used for packet split */
  81 #define IXGBE_RXBUFFER_2048  2048
  82
  83 #define IXGBE_RX_HDR_SIZE IXGBE_RXBUFFER_256
  84
  85 #define MAXIMUM_ETHERNET_VLAN_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
  86
  87 /* How many Tx Descriptors do we need to call netif_wake_queue? */
  88 #define IXGBE_TX_QUEUE_WAKE 16
  89
  90 /* How many Rx Buffers do we bundle into one write to the hardware ? */
  91 #define IXGBE_RX_BUFFER_WRITE   16      /* Must be power of 2 */
  92
  93 #define IXGBE_TX_FLAGS_CSUM             (u32)(1)
  94 #define IXGBE_TX_FLAGS_VLAN             (u32)(1 << 1)
  95 #define IXGBE_TX_FLAGS_TSO              (u32)(1 << 2)
  96 #define IXGBE_TX_FLAGS_IPV4             (u32)(1 << 3)
  97 #define IXGBE_TX_FLAGS_VLAN_MASK        0xffff0000
  98 #define IXGBE_TX_FLAGS_VLAN_SHIFT       16
  99
 100 /* wrapper around a pointer to a socket buffer,
 101  * so a DMA handle can be stored along with the buffer */
 102 struct ixgbe_tx_buffer {
 103         struct sk_buff *skb;
 104         dma_addr_t dma;
 105         unsigned long time_stamp;
 106         u16 length;
 107         u16 next_to_watch;
 108 };
 109
 110 struct ixgbe_rx_buffer {
 111         struct sk_buff *skb;
 112         dma_addr_t dma;
 113         struct page *page;
 114         dma_addr_t page_dma;
 115 };
 116
 117 struct ixgbe_queue_stats {
 118         u64 packets;
 119         u64 bytes;
 120 };
 121
 122 struct ixgbe_ring {
 123         struct ixgbe_adapter *adapter;  /* backlink */
 124         void *desc;                     /* descriptor ring memory */
 125         dma_addr_t dma;                 /* phys. address of descriptor ring */
 126         unsigned int size;              /* length in bytes */
 127         unsigned int count;             /* amount of descriptors */
 128         unsigned int next_to_use;
 129         unsigned int next_to_clean;
 130
 131         union {
 132                 struct ixgbe_tx_buffer *tx_buffer_info;
 133                 struct ixgbe_rx_buffer *rx_buffer_info;
 134         };
 135
 136         u16 head;
 137         u16 tail;
 138
 139         /* To protect race between sender and clean_tx_irq */
 140         spinlock_t tx_lock;
 141
 142         struct ixgbe_queue_stats stats;
 143
 144         u32 eims_value;
 145         u16 itr_register;
 146
 147         char name[IFNAMSIZ + 5];
 148         u16 work_limit;                /* max work per interrupt */
 149 };
 150
 151 /* Helper macros to switch between ints/sec and what the register uses.
 152  * And yes, it's the same math going both ways.
 153  */
 154 #define EITR_INTS_PER_SEC_TO_REG(_eitr) \
 155         ((_eitr) ? (1000000000 / ((_eitr) * 256)) : 0)
 156 #define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
 157
 158 #define IXGBE_DESC_UNUSED(R) \
 159         ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
 160         (R)->next_to_clean - (R)->next_to_use - 1)
 161
 162 #define IXGBE_RX_DESC_ADV(R, i)     \
 163         (&(((union ixgbe_adv_rx_desc *)((R).desc))[i]))
 164 #define IXGBE_TX_DESC_ADV(R, i)     \
 165         (&(((union ixgbe_adv_tx_desc *)((R).desc))[i]))
 166 #define IXGBE_TX_CTXTDESC_ADV(R, i)         \
 167         (&(((struct ixgbe_adv_tx_context_desc *)((R).desc))[i]))
 168
 169 #define IXGBE_MAX_JUMBO_FRAME_SIZE        16128
 170
 171 /* board specific private data structure */
 172 struct ixgbe_adapter {
 173         struct timer_list watchdog_timer;
 174         struct vlan_group *vlgrp;
 175         u16 bd_number;
 176         u16 rx_buf_len;
 177         atomic_t irq_sem;
 178         struct work_struct reset_task;
 179
 180         /* TX */
 181         struct ixgbe_ring *tx_ring;     /* One per active queue */
 182         struct napi_struct napi;
 183         u64 restart_queue;
 184         u64 lsc_int;
 185         u64 hw_tso_ctxt;
 186         u64 hw_tso6_ctxt;
 187         u32 tx_timeout_count;
 188         bool detect_tx_hung;
 189
 190         /* RX */
 191         struct ixgbe_ring *rx_ring;     /* One per active queue */
 192         u64 hw_csum_tx_good;
 193         u64 hw_csum_rx_error;
 194         u64 hw_csum_rx_good;
 195         u64 non_eop_descs;
 196         int num_tx_queues;
 197         int num_rx_queues;
 198         struct msix_entry *msix_entries;
 199
 200         u64 rx_hdr_split;
 201         u32 alloc_rx_page_failed;
 202         u32 alloc_rx_buff_failed;
 203
 204         u32 flags;
 205 #define IXGBE_FLAG_RX_CSUM_ENABLED              (u32)(1)
 206 #define IXGBE_FLAG_MSI_ENABLED                  (u32)(1 << 1)
 207 #define IXGBE_FLAG_MSIX_ENABLED                 (u32)(1 << 2)
 208 #define IXGBE_FLAG_RX_PS_ENABLED                (u32)(1 << 3)
 209 #define IXGBE_FLAG_IN_NETPOLL                   (u32)(1 << 4)
 210
 211         /* Interrupt Throttle Rate */
 212         u32 rx_eitr;
 213         u32 tx_eitr;
 214
 215         /* OS defined structs */
 216         struct net_device *netdev;
 217         struct pci_dev *pdev;
 218         struct net_device_stats net_stats;
 219
 220         /* structs defined in ixgbe_hw.h */
 221         struct ixgbe_hw hw;
 222         u16 msg_enable;
 223         struct ixgbe_hw_stats stats;
 224         char lsc_name[IFNAMSIZ + 5];
 225
 226         unsigned long state;
 227         u64 tx_busy;
 228 };
 229
 230 enum ixbge_state_t {
 231         __IXGBE_TESTING,
 232         __IXGBE_RESETTING,
 233         __IXGBE_DOWN
 234 };
 235
 236 enum ixgbe_boards {
 237         board_82598,
 238 };
 239
 240 extern struct ixgbe_info ixgbe_82598_info;
 241
 242 extern char ixgbe_driver_name[];
 243 extern const char ixgbe_driver_version[];
 244
 245 extern int ixgbe_up(struct ixgbe_adapter *adapter);
 246 extern void ixgbe_down(struct ixgbe_adapter *adapter);
 247 extern void ixgbe_reset(struct ixgbe_adapter *adapter);
 248 extern void ixgbe_update_stats(struct ixgbe_adapter *adapter);
 249 extern void ixgbe_set_ethtool_ops(struct net_device *netdev);
 250 extern int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
 251                                     struct ixgbe_ring *rxdr);
 252 extern int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
 253                                     struct ixgbe_ring *txdr);
 254
 255 #endif /* _IXGBE_H_ */