drivers/net/igb/igb.h

   1 /*******************************************************************************
   2
   3   Intel(R) Gigabit Ethernet Linux driver
   4   Copyright(c) 2007-2009 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   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28
  29 /* Linux PRO/1000 Ethernet Driver main header file */
  30
  31 #ifndef _IGB_H_
  32 #define _IGB_H_
  33
  34 #include "e1000_mac.h"
  35 #include "e1000_82575.h"
  36
  37 #include <linux/clocksource.h>
  38 #include <linux/timecompare.h>
  39 #include <linux/net_tstamp.h>
  40
  41 struct igb_adapter;
  42
  43 /* ((1000000000ns / (6000ints/s * 1024ns)) << 2 = 648 */
  44 #define IGB_START_ITR 648
  45
  46 /* TX/RX descriptor defines */
  47 #define IGB_DEFAULT_TXD                  256
  48 #define IGB_MIN_TXD                       80
  49 #define IGB_MAX_TXD                     4096
  50
  51 #define IGB_DEFAULT_RXD                  256
  52 #define IGB_MIN_RXD                       80
  53 #define IGB_MAX_RXD                     4096
  54
  55 #define IGB_DEFAULT_ITR                    3 /* dynamic */
  56 #define IGB_MAX_ITR_USECS              10000
  57 #define IGB_MIN_ITR_USECS                 10
  58 #define NON_Q_VECTORS                      1
  59 #define MAX_Q_VECTORS                      8
  60
  61 /* Transmit and receive queues */
  62 #define IGB_MAX_RX_QUEUES     (adapter->vfs_allocated_count ? \
  63                                (adapter->vfs_allocated_count > 6 ? 1 : 2) : 4)
  64 #define IGB_MAX_TX_QUEUES     IGB_MAX_RX_QUEUES
  65 #define IGB_ABS_MAX_TX_QUEUES     4
  66
  67 #define IGB_MAX_VF_MC_ENTRIES              30
  68 #define IGB_MAX_VF_FUNCTIONS               8
  69 #define IGB_MAX_VFTA_ENTRIES               128
  70
  71 struct vf_data_storage {
  72         unsigned char vf_mac_addresses[ETH_ALEN];
  73         u16 vf_mc_hashes[IGB_MAX_VF_MC_ENTRIES];
  74         u16 num_vf_mc_hashes;
  75         u16 vlans_enabled;
  76         bool clear_to_send;
  77 };
  78
  79 /* RX descriptor control thresholds.
  80  * PTHRESH - MAC will consider prefetch if it has fewer than this number of
  81  *           descriptors available in its onboard memory.
  82  *           Setting this to 0 disables RX descriptor prefetch.
  83  * HTHRESH - MAC will only prefetch if there are at least this many descriptors
  84  *           available in host memory.
  85  *           If PTHRESH is 0, this should also be 0.
  86  * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
  87  *           descriptors until either it has this many to write back, or the
  88  *           ITR timer expires.
  89  */
  90 #define IGB_RX_PTHRESH                    (hw->mac.type <= e1000_82576 ? 16 : 8)
  91 #define IGB_RX_HTHRESH                     8
  92 #define IGB_RX_WTHRESH                     1
  93 #define IGB_TX_PTHRESH                     8
  94 #define IGB_TX_HTHRESH                     1
  95 #define IGB_TX_WTHRESH                     ((hw->mac.type == e1000_82576 && \
  96                                              adapter->msix_entries) ? 0 : 16)
  97
  98 /* this is the size past which hardware will drop packets when setting LPE=0 */
  99 #define MAXIMUM_ETHERNET_VLAN_SIZE 1522
 100
 101 /* Supported Rx Buffer Sizes */
 102 #define IGB_RXBUFFER_128   128    /* Used for packet split */
 103 #define IGB_RXBUFFER_1024  1024
 104 #define IGB_RXBUFFER_2048  2048
 105 #define IGB_RXBUFFER_16384 16384
 106
 107 #define MAX_STD_JUMBO_FRAME_SIZE 9234
 108
 109 /* How many Tx Descriptors do we need to call netif_wake_queue ? */
 110 #define IGB_TX_QUEUE_WAKE       16
 111 /* How many Rx Buffers do we bundle into one write to the hardware ? */
 112 #define IGB_RX_BUFFER_WRITE     16      /* Must be power of 2 */
 113
 114 #define AUTO_ALL_MODES            0
 115 #define IGB_EEPROM_APME         0x0400
 116
 117 #ifndef IGB_MASTER_SLAVE
 118 /* Switch to override PHY master/slave setting */
 119 #define IGB_MASTER_SLAVE        e1000_ms_hw_default
 120 #endif
 121
 122 #define IGB_MNG_VLAN_NONE -1
 123
 124 /* wrapper around a pointer to a socket buffer,
 125  * so a DMA handle can be stored along with the buffer */
 126 struct igb_buffer {
 127         struct sk_buff *skb;
 128         dma_addr_t dma;
 129         union {
 130                 /* TX */
 131                 struct {
 132                         unsigned long time_stamp;
 133                         u16 length;
 134                         u16 next_to_watch;
 135                 };
 136                 /* RX */
 137                 struct {
 138                         struct page *page;
 139                         u64 page_dma;
 140                         unsigned int page_offset;
 141                 };
 142         };
 143 };
 144
 145 struct igb_tx_queue_stats {
 146         u64 packets;
 147         u64 bytes;
 148         u64 restart_queue;
 149 };
 150
 151 struct igb_rx_queue_stats {
 152         u64 packets;
 153         u64 bytes;
 154         u64 drops;
 155         u64 csum_err;
 156         u64 alloc_failed;
 157 };
 158
 159 struct igb_q_vector {
 160         struct igb_adapter *adapter; /* backlink */
 161         struct igb_ring *rx_ring;
 162         struct igb_ring *tx_ring;
 163         struct napi_struct napi;
 164
 165         u32 eims_value;
 166         u16 cpu;
 167
 168         u16 itr_val;
 169         u8 set_itr;
 170         u8 itr_shift;
 171         void __iomem *itr_register;
 172
 173         char name[IFNAMSIZ + 9];
 174 };
 175
 176 struct igb_ring {
 177         struct igb_q_vector *q_vector; /* backlink to q_vector */
 178         void *desc;                    /* descriptor ring memory */
 179         struct pci_dev *pdev;          /* pci device for dma mapping */
 180         dma_addr_t dma;                /* phys address of the ring */
 181         unsigned int size;             /* length of desc. ring in bytes */
 182         unsigned int count;            /* number of desc. in the ring */
 183         u16 next_to_use;
 184         u16 next_to_clean;
 185         void __iomem *head;
 186         void __iomem *tail;
 187         struct igb_buffer *buffer_info; /* array of buffer info structs */
 188
 189         u8 queue_index;
 190         u8 reg_idx;
 191
 192         unsigned int total_bytes;
 193         unsigned int total_packets;
 194
 195         union {
 196                 /* TX */
 197                 struct {
 198                         struct igb_tx_queue_stats tx_stats;
 199                         bool detect_tx_hung;
 200                 };
 201                 /* RX */
 202                 struct {
 203                         struct igb_rx_queue_stats rx_stats;
 204                         u32 rx_buffer_len;
 205                 };
 206         };
 207 };
 208
 209 #define E1000_RX_DESC_ADV(R, i)     \
 210         (&(((union e1000_adv_rx_desc *)((R).desc))[i]))
 211 #define E1000_TX_DESC_ADV(R, i)     \
 212         (&(((union e1000_adv_tx_desc *)((R).desc))[i]))
 213 #define E1000_TX_CTXTDESC_ADV(R, i)         \
 214         (&(((struct e1000_adv_tx_context_desc *)((R).desc))[i]))
 215
 216 /* board specific private data structure */
 217
 218 struct igb_adapter {
 219         struct timer_list watchdog_timer;
 220         struct timer_list phy_info_timer;
 221         struct vlan_group *vlgrp;
 222         u16 mng_vlan_id;
 223         u32 bd_number;
 224         u32 wol;
 225         u32 en_mng_pt;
 226         u16 link_speed;
 227         u16 link_duplex;
 228         unsigned int total_tx_bytes;
 229         unsigned int total_tx_packets;
 230         unsigned int total_rx_bytes;
 231         unsigned int total_rx_packets;
 232         /* Interrupt Throttle Rate */
 233         u32 itr;
 234         u32 itr_setting;
 235         u16 tx_itr;
 236         u16 rx_itr;
 237
 238         struct work_struct reset_task;
 239         struct work_struct watchdog_task;
 240         bool fc_autoneg;
 241         u8  tx_timeout_factor;
 242         struct timer_list blink_timer;
 243         unsigned long led_status;
 244
 245         /* TX */
 246         struct igb_ring *tx_ring;      /* One per active queue */
 247         unsigned long tx_queue_len;
 248         u32 txd_cmd;
 249         u32 gotc;
 250         u64 gotc_old;
 251         u64 tpt_old;
 252         u64 colc_old;
 253         u32 tx_timeout_count;
 254
 255         /* RX */
 256         struct igb_ring *rx_ring;      /* One per active queue */
 257         int num_tx_queues;
 258         int num_rx_queues;
 259
 260         u32 gorc;
 261         u64 gorc_old;
 262         u32 max_frame_size;
 263         u32 min_frame_size;
 264
 265         /* OS defined structs */
 266         struct net_device *netdev;
 267         struct pci_dev *pdev;
 268         struct cyclecounter cycles;
 269         struct timecounter clock;
 270         struct timecompare compare;
 271         struct hwtstamp_config hwtstamp_config;
 272
 273         /* structs defined in e1000_hw.h */
 274         struct e1000_hw hw;
 275         struct e1000_hw_stats stats;
 276         struct e1000_phy_info phy_info;
 277         struct e1000_phy_stats phy_stats;
 278
 279         u32 test_icr;
 280         struct igb_ring test_tx_ring;
 281         struct igb_ring test_rx_ring;
 282
 283         int msg_enable;
 284
 285         unsigned int num_q_vectors;
 286         struct igb_q_vector *q_vector[MAX_Q_VECTORS];
 287         struct msix_entry *msix_entries;
 288         u32 eims_enable_mask;
 289         u32 eims_other;
 290
 291         /* to not mess up cache alignment, always add to the bottom */
 292         unsigned long state;
 293         unsigned int flags;
 294         u32 eeprom_wol;
 295
 296         struct igb_ring *multi_tx_table[IGB_ABS_MAX_TX_QUEUES];
 297         unsigned int tx_ring_count;
 298         unsigned int rx_ring_count;
 299         unsigned int vfs_allocated_count;
 300         struct vf_data_storage *vf_data;
 301 };
 302
 303 #define IGB_FLAG_HAS_MSI           (1 << 0)
 304 #define IGB_FLAG_DCA_ENABLED       (1 << 1)
 305 #define IGB_FLAG_QUAD_PORT_A       (1 << 2)
 306 #define IGB_FLAG_NEED_CTX_IDX      (1 << 3)
 307 #define IGB_FLAG_RX_CSUM_DISABLED  (1 << 4)
 308
 309 enum e1000_state_t {
 310         __IGB_TESTING,
 311         __IGB_RESETTING,
 312         __IGB_DOWN
 313 };
 314
 315 enum igb_boards {
 316         board_82575,
 317 };
 318
 319 extern char igb_driver_name[];
 320 extern char igb_driver_version[];
 321
 322 extern char *igb_get_hw_dev_name(struct e1000_hw *hw);
 323 extern int igb_up(struct igb_adapter *);
 324 extern void igb_down(struct igb_adapter *);
 325 extern void igb_reinit_locked(struct igb_adapter *);
 326 extern void igb_reset(struct igb_adapter *);
 327 extern int igb_set_spd_dplx(struct igb_adapter *, u16);
 328 extern int igb_setup_tx_resources(struct igb_ring *);
 329 extern int igb_setup_rx_resources(struct igb_ring *);
 330 extern void igb_free_tx_resources(struct igb_ring *);
 331 extern void igb_free_rx_resources(struct igb_ring *);
 332 extern void igb_update_stats(struct igb_adapter *);
 333 extern void igb_set_ethtool_ops(struct net_device *);
 334
 335 static inline s32 igb_reset_phy(struct e1000_hw *hw)
 336 {
 337         if (hw->phy.ops.reset)
 338                 return hw->phy.ops.reset(hw);
 339
 340         return 0;
 341 }
 342
 343 static inline s32 igb_read_phy_reg(struct e1000_hw *hw, u32 offset, u16 *data)
 344 {
 345         if (hw->phy.ops.read_reg)
 346                 return hw->phy.ops.read_reg(hw, offset, data);
 347
 348         return 0;
 349 }
 350
 351 static inline s32 igb_write_phy_reg(struct e1000_hw *hw, u32 offset, u16 data)
 352 {
 353         if (hw->phy.ops.write_reg)
 354                 return hw->phy.ops.write_reg(hw, offset, data);
 355
 356         return 0;
 357 }
 358
 359 static inline s32 igb_get_phy_info(struct e1000_hw *hw)
 360 {
 361         if (hw->phy.ops.get_phy_info)
 362                 return hw->phy.ops.get_phy_info(hw);
 363
 364         return 0;
 365 }
 366
 367 #endif /* _IGB_H_ */