drivers/net/ethernet/intel/igbvf/igbvf.h

   1 /*******************************************************************************
   2
   3   Intel(R) 82576 Virtual Function Linux driver
   4   Copyright(c) 2009 - 2012 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 #include <linux/if_vlan.h>
  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                    488 /* ~8000 ints/sec */
  47 #define IGBVF_4K_ITR                       980
  48 #define IGBVF_20K_ITR                      196
  49 #define IGBVF_70K_ITR                       56
  50
  51 enum latency_range {
  52         lowest_latency = 0,
  53         low_latency = 1,
  54         bulk_latency = 2,
  55         latency_invalid = 255
  56 };
  57
  58
  59 /* Interrupt modes, as used by the IntMode parameter */
  60 #define IGBVF_INT_MODE_LEGACY           0
  61 #define IGBVF_INT_MODE_MSI              1
  62 #define IGBVF_INT_MODE_MSIX             2
  63
  64 /* Tx/Rx descriptor defines */
  65 #define IGBVF_DEFAULT_TXD               256
  66 #define IGBVF_MAX_TXD                   4096
  67 #define IGBVF_MIN_TXD                   80
  68
  69 #define IGBVF_DEFAULT_RXD               256
  70 #define IGBVF_MAX_RXD                   4096
  71 #define IGBVF_MIN_RXD                   80
  72
  73 #define IGBVF_MIN_ITR_USECS             10 /* 100000 irq/sec */
  74 #define IGBVF_MAX_ITR_USECS             10000 /* 100    irq/sec */
  75
  76 /* RX descriptor control thresholds.
  77  * PTHRESH - MAC will consider prefetch if it has fewer than this number of
  78  *           descriptors available in its onboard memory.
  79  *           Setting this to 0 disables RX descriptor prefetch.
  80  * HTHRESH - MAC will only prefetch if there are at least this many descriptors
  81  *           available in host memory.
  82  *           If PTHRESH is 0, this should also be 0.
  83  * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
  84  *           descriptors until either it has this many to write back, or the
  85  *           ITR timer expires.
  86  */
  87 #define IGBVF_RX_PTHRESH                16
  88 #define IGBVF_RX_HTHRESH                8
  89 #define IGBVF_RX_WTHRESH                1
  90
  91 /* this is the size past which hardware will drop packets when setting LPE=0 */
  92 #define MAXIMUM_ETHERNET_VLAN_SIZE      1522
  93
  94 #define IGBVF_FC_PAUSE_TIME             0x0680 /* 858 usec */
  95
  96 /* How many Tx Descriptors do we need to call netif_wake_queue ? */
  97 #define IGBVF_TX_QUEUE_WAKE             32
  98 /* How many Rx Buffers do we bundle into one write to the hardware ? */
  99 #define IGBVF_RX_BUFFER_WRITE           16 /* Must be power of 2 */
 100
 101 #define AUTO_ALL_MODES                  0
 102 #define IGBVF_EEPROM_APME               0x0400
 103
 104 #define IGBVF_MNG_VLAN_NONE             (-1)
 105
 106 /* Number of packet split data buffers (not including the header buffer) */
 107 #define PS_PAGE_BUFFERS                 (MAX_PS_BUFFERS - 1)
 108
 109 enum igbvf_boards {
 110         board_vf,
 111         board_i350_vf,
 112 };
 113
 114 struct igbvf_queue_stats {
 115         u64 packets;
 116         u64 bytes;
 117 };
 118
 119 /*
 120  * wrappers around a pointer to a socket buffer,
 121  * so a DMA handle can be stored along with the buffer
 122  */
 123 struct igbvf_buffer {
 124         dma_addr_t dma;
 125         struct sk_buff *skb;
 126         union {
 127                 /* Tx */
 128                 struct {
 129                         unsigned long time_stamp;
 130                         union e1000_adv_tx_desc *next_to_watch;
 131                         u16 length;
 132                         u16 mapped_as_page;
 133                 };
 134                 /* Rx */
 135                 struct {
 136                         struct page *page;
 137                         u64 page_dma;
 138                         unsigned int page_offset;
 139                 };
 140         };
 141 };
 142
 143 union igbvf_desc {
 144         union e1000_adv_rx_desc rx_desc;
 145         union e1000_adv_tx_desc tx_desc;
 146         struct e1000_adv_tx_context_desc tx_context_desc;
 147 };
 148
 149 struct igbvf_ring {
 150         struct igbvf_adapter *adapter;  /* backlink */
 151         union igbvf_desc *desc;         /* pointer to ring memory  */
 152         dma_addr_t dma;                 /* phys address of ring    */
 153         unsigned int size;              /* length of ring in bytes */
 154         unsigned int count;             /* number of desc. in ring */
 155
 156         u16 next_to_use;
 157         u16 next_to_clean;
 158
 159         u16 head;
 160         u16 tail;
 161
 162         /* array of buffer information structs */
 163         struct igbvf_buffer *buffer_info;
 164         struct napi_struct napi;
 165
 166         char name[IFNAMSIZ + 5];
 167         u32 eims_value;
 168         u32 itr_val;
 169         enum latency_range itr_range;
 170         u16 itr_register;
 171         int set_itr;
 172
 173         struct sk_buff *rx_skb_top;
 174
 175         struct igbvf_queue_stats stats;
 176 };
 177
 178 /* board specific private data structure */
 179 struct igbvf_adapter {
 180         struct timer_list watchdog_timer;
 181         struct timer_list blink_timer;
 182
 183         struct work_struct reset_task;
 184         struct work_struct watchdog_task;
 185
 186         const struct igbvf_info *ei;
 187
 188         unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 189         u32 bd_number;
 190         u32 rx_buffer_len;
 191         u32 polling_interval;
 192         u16 mng_vlan_id;
 193         u16 link_speed;
 194         u16 link_duplex;
 195
 196         spinlock_t tx_queue_lock; /* prevent concurrent tail updates */
 197
 198         /* track device up/down/testing state */
 199         unsigned long state;
 200
 201         /* Interrupt Throttle Rate */
 202         u32 requested_itr; /* ints/sec or adaptive */
 203         u32 current_itr; /* Actual ITR register value, not ints/sec */
 204
 205         /*
 206          * Tx
 207          */
 208         struct igbvf_ring *tx_ring /* One per active queue */
 209         ____cacheline_aligned_in_smp;
 210
 211         unsigned int restart_queue;
 212         u32 txd_cmd;
 213
 214         u32 tx_int_delay;
 215         u32 tx_abs_int_delay;
 216
 217         unsigned int total_tx_bytes;
 218         unsigned int total_tx_packets;
 219         unsigned int total_rx_bytes;
 220         unsigned int total_rx_packets;
 221
 222         /* Tx stats */
 223         u32 tx_timeout_count;
 224         u32 tx_fifo_head;
 225         u32 tx_head_addr;
 226         u32 tx_fifo_size;
 227         u32 tx_dma_failed;
 228
 229         /*
 230          * Rx
 231          */
 232         struct igbvf_ring *rx_ring;
 233
 234         u32 rx_int_delay;
 235         u32 rx_abs_int_delay;
 236
 237         /* Rx stats */
 238         u64 hw_csum_err;
 239         u64 hw_csum_good;
 240         u64 rx_hdr_split;
 241         u32 alloc_rx_buff_failed;
 242         u32 rx_dma_failed;
 243
 244         unsigned int rx_ps_hdr_size;
 245         u32 max_frame_size;
 246         u32 min_frame_size;
 247
 248         /* OS defined structs */
 249         struct net_device *netdev;
 250         struct pci_dev *pdev;
 251         struct net_device_stats net_stats;
 252         spinlock_t stats_lock;      /* prevent concurrent stats updates */
 253
 254         /* structs defined in e1000_hw.h */
 255         struct e1000_hw hw;
 256
 257         /* The VF counters don't clear on read so we have to get a base
 258          * count on driver start up and always subtract that base on
 259          * on the first update, thus the flag..
 260          */
 261         struct e1000_vf_stats stats;
 262         u64 zero_base;
 263
 264         struct igbvf_ring test_tx_ring;
 265         struct igbvf_ring test_rx_ring;
 266         u32 test_icr;
 267
 268         u32 msg_enable;
 269         struct msix_entry *msix_entries;
 270         int int_mode;
 271         u32 eims_enable_mask;
 272         u32 eims_other;
 273         u32 int_counter0;
 274         u32 int_counter1;
 275
 276         u32 eeprom_wol;
 277         u32 wol;
 278         u32 pba;
 279
 280         bool fc_autoneg;
 281
 282         unsigned long led_status;
 283
 284         unsigned int flags;
 285         unsigned long last_reset;
 286 };
 287
 288 struct igbvf_info {
 289         enum e1000_mac_type     mac;
 290         unsigned int            flags;
 291         u32                     pba;
 292         void                    (*init_ops)(struct e1000_hw *);
 293         s32                     (*get_variants)(struct igbvf_adapter *);
 294 };
 295
 296 /* hardware capability, feature, and workaround flags */
 297 #define IGBVF_FLAG_RX_CSUM_DISABLED             (1 << 0)
 298 #define IGBVF_FLAG_RX_LB_VLAN_BSWAP             (1 << 1)
 299 #define IGBVF_RX_DESC_ADV(R, i)     \
 300         (&((((R).desc))[i].rx_desc))
 301 #define IGBVF_TX_DESC_ADV(R, i)     \
 302         (&((((R).desc))[i].tx_desc))
 303 #define IGBVF_TX_CTXTDESC_ADV(R, i) \
 304         (&((((R).desc))[i].tx_context_desc))
 305
 306 enum igbvf_state_t {
 307         __IGBVF_TESTING,
 308         __IGBVF_RESETTING,
 309         __IGBVF_DOWN
 310 };
 311
 312 extern char igbvf_driver_name[];
 313 extern const char igbvf_driver_version[];
 314
 315 void igbvf_check_options(struct igbvf_adapter *);
 316 void igbvf_set_ethtool_ops(struct net_device *);
 317
 318 int igbvf_up(struct igbvf_adapter *);
 319 void igbvf_down(struct igbvf_adapter *);
 320 void igbvf_reinit_locked(struct igbvf_adapter *);
 321 int igbvf_setup_rx_resources(struct igbvf_adapter *, struct igbvf_ring *);
 322 int igbvf_setup_tx_resources(struct igbvf_adapter *, struct igbvf_ring *);
 323 void igbvf_free_rx_resources(struct igbvf_ring *);
 324 void igbvf_free_tx_resources(struct igbvf_ring *);
 325 void igbvf_update_stats(struct igbvf_adapter *);
 326
 327 extern unsigned int copybreak;
 328
 329 #endif /* _IGBVF_H_ */