drivers/net/igbvf/igbvf.h

   1 /*******************************************************************************
   2
   3   Intel(R) 82576 Virtual Function Linux driver
   4   Copyright(c) 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 /* Linux PRO/1000 Ethernet Driver main header file */
  29
  30 #ifndef _IGBVF_H_
  31 #define _IGBVF_H_
  32
  33 #include <linux/types.h>
  34 #include <linux/timer.h>
  35 #include <linux/io.h>
  36 #include <linux/netdevice.h>
  37
  38
  39 #include "vf.h"
  40
  41 /* Forward declarations */
  42 struct igbvf_info;
  43 struct igbvf_adapter;
  44
  45 /* Interrupt defines */
  46 #define IGBVF_START_ITR                 648 /* ~6000 ints/sec */
  47
  48 /* Interrupt modes, as used by the IntMode parameter */
  49 #define IGBVF_INT_MODE_LEGACY           0
  50 #define IGBVF_INT_MODE_MSI              1
  51 #define IGBVF_INT_MODE_MSIX             2
  52
  53 /* Tx/Rx descriptor defines */
  54 #define IGBVF_DEFAULT_TXD               256
  55 #define IGBVF_MAX_TXD                   4096
  56 #define IGBVF_MIN_TXD                   80
  57
  58 #define IGBVF_DEFAULT_RXD               256
  59 #define IGBVF_MAX_RXD                   4096
  60 #define IGBVF_MIN_RXD                   80
  61
  62 #define IGBVF_MIN_ITR_USECS             10 /* 100000 irq/sec */
  63 #define IGBVF_MAX_ITR_USECS             10000 /* 100    irq/sec */
  64
  65 /* RX descriptor control thresholds.
  66  * PTHRESH - MAC will consider prefetch if it has fewer than this number of
  67  *           descriptors available in its onboard memory.
  68  *           Setting this to 0 disables RX descriptor prefetch.
  69  * HTHRESH - MAC will only prefetch if there are at least this many descriptors
  70  *           available in host memory.
  71  *           If PTHRESH is 0, this should also be 0.
  72  * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
  73  *           descriptors until either it has this many to write back, or the
  74  *           ITR timer expires.
  75  */
  76 #define IGBVF_RX_PTHRESH                16
  77 #define IGBVF_RX_HTHRESH                8
  78 #define IGBVF_RX_WTHRESH                1
  79
  80 /* this is the size past which hardware will drop packets when setting LPE=0 */
  81 #define MAXIMUM_ETHERNET_VLAN_SIZE      1522
  82
  83 #define IGBVF_FC_PAUSE_TIME             0x0680 /* 858 usec */
  84
  85 /* How many Tx Descriptors do we need to call netif_wake_queue ? */
  86 #define IGBVF_TX_QUEUE_WAKE             32
  87 /* How many Rx Buffers do we bundle into one write to the hardware ? */
  88 #define IGBVF_RX_BUFFER_WRITE           16 /* Must be power of 2 */
  89
  90 #define AUTO_ALL_MODES                  0
  91 #define IGBVF_EEPROM_APME               0x0400
  92
  93 #define IGBVF_MNG_VLAN_NONE             (-1)
  94
  95 /* Number of packet split data buffers (not including the header buffer) */
  96 #define PS_PAGE_BUFFERS                 (MAX_PS_BUFFERS - 1)
  97
  98 enum igbvf_boards {
  99         board_vf,
 100 };
 101
 102 struct igbvf_queue_stats {
 103         u64 packets;
 104         u64 bytes;
 105 };
 106
 107 /*
 108  * wrappers around a pointer to a socket buffer,
 109  * so a DMA handle can be stored along with the buffer
 110  */
 111 struct igbvf_buffer {
 112         dma_addr_t dma;
 113         struct sk_buff *skb;
 114         union {
 115                 /* Tx */
 116                 struct {
 117                         unsigned long time_stamp;
 118                         u16 length;
 119                         u16 next_to_watch;
 120                 };
 121                 /* Rx */
 122                 struct {
 123                         struct page *page;
 124                         u64 page_dma;
 125                         unsigned int page_offset;
 126                 };
 127         };
 128 };
 129
 130 union igbvf_desc {
 131         union e1000_adv_rx_desc rx_desc;
 132         union e1000_adv_tx_desc tx_desc;
 133         struct e1000_adv_tx_context_desc tx_context_desc;
 134 };
 135
 136 struct igbvf_ring {
 137         struct igbvf_adapter *adapter;  /* backlink */
 138         union igbvf_desc *desc;         /* pointer to ring memory  */
 139         dma_addr_t dma;                 /* phys address of ring    */
 140         unsigned int size;              /* length of ring in bytes */
 141         unsigned int count;             /* number of desc. in ring */
 142
 143         u16 next_to_use;
 144         u16 next_to_clean;
 145
 146         u16 head;
 147         u16 tail;
 148
 149         /* array of buffer information structs */
 150         struct igbvf_buffer *buffer_info;
 151         struct napi_struct napi;
 152
 153         char name[IFNAMSIZ + 5];
 154         u32 eims_value;
 155         u32 itr_val;
 156         u16 itr_register;
 157         int set_itr;
 158
 159         struct sk_buff *rx_skb_top;
 160
 161         struct igbvf_queue_stats stats;
 162 };
 163
 164 /* board specific private data structure */
 165 struct igbvf_adapter {
 166         struct timer_list watchdog_timer;
 167         struct timer_list blink_timer;
 168
 169         struct work_struct reset_task;
 170         struct work_struct watchdog_task;
 171
 172         const struct igbvf_info *ei;
 173
 174         struct vlan_group *vlgrp;
 175         u32 bd_number;
 176         u32 rx_buffer_len;
 177         u32 polling_interval;
 178         u16 mng_vlan_id;
 179         u16 link_speed;
 180         u16 link_duplex;
 181
 182         spinlock_t tx_queue_lock; /* prevent concurrent tail updates */
 183
 184         /* track device up/down/testing state */
 185         unsigned long state;
 186
 187         /* Interrupt Throttle Rate */
 188         u32 itr;
 189         u32 itr_setting;
 190         u16 tx_itr;
 191         u16 rx_itr;
 192
 193         /*
 194          * Tx
 195          */
 196         struct igbvf_ring *tx_ring /* One per active queue */
 197         ____cacheline_aligned_in_smp;
 198
 199         unsigned long tx_queue_len;
 200         unsigned int restart_queue;
 201         u32 txd_cmd;
 202
 203         bool detect_tx_hung;
 204         u8 tx_timeout_factor;
 205
 206         u32 tx_int_delay;
 207         u32 tx_abs_int_delay;
 208
 209         unsigned int total_tx_bytes;
 210         unsigned int total_tx_packets;
 211         unsigned int total_rx_bytes;
 212         unsigned int total_rx_packets;
 213
 214         /* Tx stats */
 215         u32 tx_timeout_count;
 216         u32 tx_fifo_head;
 217         u32 tx_head_addr;
 218         u32 tx_fifo_size;
 219         u32 tx_dma_failed;
 220
 221         /*
 222          * Rx
 223          */
 224         struct igbvf_ring *rx_ring;
 225
 226         u32 rx_int_delay;
 227         u32 rx_abs_int_delay;
 228
 229         /* Rx stats */
 230         u64 hw_csum_err;
 231         u64 hw_csum_good;
 232         u64 rx_hdr_split;
 233         u32 alloc_rx_buff_failed;
 234         u32 rx_dma_failed;
 235
 236         unsigned int rx_ps_hdr_size;
 237         u32 max_frame_size;
 238         u32 min_frame_size;
 239
 240         /* OS defined structs */
 241         struct net_device *netdev;
 242         struct pci_dev *pdev;
 243         struct net_device_stats net_stats;
 244         spinlock_t stats_lock;      /* prevent concurrent stats updates */
 245
 246         /* structs defined in e1000_hw.h */
 247         struct e1000_hw hw;
 248
 249         /* The VF counters don't clear on read so we have to get a base
 250          * count on driver start up and always subtract that base on
 251          * on the first update, thus the flag..
 252          */
 253         struct e1000_vf_stats stats;
 254         u64 zero_base;
 255
 256         struct igbvf_ring test_tx_ring;
 257         struct igbvf_ring test_rx_ring;
 258         u32 test_icr;
 259
 260         u32 msg_enable;
 261         struct msix_entry *msix_entries;
 262         int int_mode;
 263         u32 eims_enable_mask;
 264         u32 eims_other;
 265         u32 int_counter0;
 266         u32 int_counter1;
 267
 268         u32 eeprom_wol;
 269         u32 wol;
 270         u32 pba;
 271
 272         bool fc_autoneg;
 273
 274         unsigned long led_status;
 275
 276         unsigned int flags;
 277 };
 278
 279 struct igbvf_info {
 280         enum e1000_mac_type     mac;
 281         unsigned int            flags;
 282         u32                     pba;
 283         void                    (*init_ops)(struct e1000_hw *);
 284         s32                     (*get_variants)(struct igbvf_adapter *);
 285 };
 286
 287 /* hardware capability, feature, and workaround flags */
 288 #define IGBVF_FLAG_RX_CSUM_DISABLED             (1 << 0)
 289
 290 #define IGBVF_RX_DESC_ADV(R, i)     \
 291         (&((((R).desc))[i].rx_desc))
 292 #define IGBVF_TX_DESC_ADV(R, i)     \
 293         (&((((R).desc))[i].tx_desc))
 294 #define IGBVF_TX_CTXTDESC_ADV(R, i) \
 295         (&((((R).desc))[i].tx_context_desc))
 296
 297 enum igbvf_state_t {
 298         __IGBVF_TESTING,
 299         __IGBVF_RESETTING,
 300         __IGBVF_DOWN
 301 };
 302
 303 enum latency_range {
 304         lowest_latency = 0,
 305         low_latency = 1,
 306         bulk_latency = 2,
 307         latency_invalid = 255
 308 };
 309
 310 extern char igbvf_driver_name[];
 311 extern const char igbvf_driver_version[];
 312
 313 extern void igbvf_check_options(struct igbvf_adapter *);
 314 extern void igbvf_set_ethtool_ops(struct net_device *);
 315
 316 extern int igbvf_up(struct igbvf_adapter *);
 317 extern void igbvf_down(struct igbvf_adapter *);
 318 extern void igbvf_reinit_locked(struct igbvf_adapter *);
 319 extern int igbvf_setup_rx_resources(struct igbvf_adapter *, struct igbvf_ring *);
 320 extern int igbvf_setup_tx_resources(struct igbvf_adapter *, struct igbvf_ring *);
 321 extern void igbvf_free_rx_resources(struct igbvf_ring *);
 322 extern void igbvf_free_tx_resources(struct igbvf_ring *);
 323 extern void igbvf_update_stats(struct igbvf_adapter *);
 324
 325 extern unsigned int copybreak;
 326
 327 #endif /* _IGBVF_H_ */