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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright(c) 2009 - 2018 Intel Corporation. */
   3
   4 /* Linux PRO/1000 Ethernet Driver main header file */
   5
   6 #ifndef _IGBVF_H_
   7 #define _IGBVF_H_
   8
   9 #include <linux/types.h>
  10 #include <linux/timer.h>
  11 #include <linux/io.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/if_vlan.h>
  14
  15 #include "vf.h"
  16
  17 /* Forward declarations */
  18 struct igbvf_info;
  19 struct igbvf_adapter;
  20
  21 /* Interrupt defines */
  22 #define IGBVF_START_ITR         488 /* ~8000 ints/sec */
  23 #define IGBVF_4K_ITR            980
  24 #define IGBVF_20K_ITR           196
  25 #define IGBVF_70K_ITR           56
  26
  27 enum latency_range {
  28         lowest_latency = 0,
  29         low_latency = 1,
  30         bulk_latency = 2,
  31         latency_invalid = 255
  32 };
  33
  34 /* Interrupt modes, as used by the IntMode parameter */
  35 #define IGBVF_INT_MODE_LEGACY   0
  36 #define IGBVF_INT_MODE_MSI      1
  37 #define IGBVF_INT_MODE_MSIX     2
  38
  39 /* Tx/Rx descriptor defines */
  40 #define IGBVF_DEFAULT_TXD       256
  41 #define IGBVF_MAX_TXD           4096
  42 #define IGBVF_MIN_TXD           80
  43
  44 #define IGBVF_DEFAULT_RXD       256
  45 #define IGBVF_MAX_RXD           4096
  46 #define IGBVF_MIN_RXD           80
  47
  48 #define IGBVF_MIN_ITR_USECS     10 /* 100000 irq/sec */
  49 #define IGBVF_MAX_ITR_USECS     10000 /* 100    irq/sec */
  50
  51 /* RX descriptor control thresholds.
  52  * PTHRESH - MAC will consider prefetch if it has fewer than this number of
  53  *         descriptors available in its onboard memory.
  54  *         Setting this to 0 disables RX descriptor prefetch.
  55  * HTHRESH - MAC will only prefetch if there are at least this many descriptors
  56  *         available in host memory.
  57  *         If PTHRESH is 0, this should also be 0.
  58  * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
  59  *         descriptors until either it has this many to write back, or the
  60  *         ITR timer expires.
  61  */
  62 #define IGBVF_RX_PTHRESH        16
  63 #define IGBVF_RX_HTHRESH        8
  64 #define IGBVF_RX_WTHRESH        1
  65
  66 /* this is the size past which hardware will drop packets when setting LPE=0 */
  67 #define MAXIMUM_ETHERNET_VLAN_SIZE      1522
  68
  69 #define IGBVF_FC_PAUSE_TIME     0x0680 /* 858 usec */
  70
  71 /* How many Tx Descriptors do we need to call netif_wake_queue ? */
  72 #define IGBVF_TX_QUEUE_WAKE     32
  73 /* How many Rx Buffers do we bundle into one write to the hardware ? */
  74 #define IGBVF_RX_BUFFER_WRITE   16 /* Must be power of 2 */
  75
  76 #define AUTO_ALL_MODES          0
  77 #define IGBVF_EEPROM_APME       0x0400
  78
  79 #define IGBVF_MNG_VLAN_NONE     (-1)
  80
  81 #define IGBVF_MAX_MAC_FILTERS   3
  82
  83 /* Number of packet split data buffers (not including the header buffer) */
  84 #define PS_PAGE_BUFFERS         (MAX_PS_BUFFERS - 1)
  85
  86 enum igbvf_boards {
  87         board_vf,
  88         board_i350_vf,
  89 };
  90
  91 struct igbvf_queue_stats {
  92         u64 packets;
  93         u64 bytes;
  94 };
  95
  96 /* wrappers around a pointer to a socket buffer,
  97  * so a DMA handle can be stored along with the buffer
  98  */
  99 struct igbvf_buffer {
 100         dma_addr_t dma;
 101         struct sk_buff *skb;
 102         union {
 103                 /* Tx */
 104                 struct {
 105                         unsigned long time_stamp;
 106                         union e1000_adv_tx_desc *next_to_watch;
 107                         u16 length;
 108                         u16 mapped_as_page;
 109                 };
 110                 /* Rx */
 111                 struct {
 112                         struct page *page;
 113                         u64 page_dma;
 114                         unsigned int page_offset;
 115                 };
 116         };
 117 };
 118
 119 union igbvf_desc {
 120         union e1000_adv_rx_desc rx_desc;
 121         union e1000_adv_tx_desc tx_desc;
 122         struct e1000_adv_tx_context_desc tx_context_desc;
 123 };
 124
 125 struct igbvf_ring {
 126         struct igbvf_adapter *adapter;  /* backlink */
 127         union igbvf_desc *desc; /* pointer to ring memory  */
 128         dma_addr_t dma;         /* phys address of ring    */
 129         unsigned int size;      /* length of ring in bytes */
 130         unsigned int count;     /* number of desc. in ring */
 131
 132         u16 next_to_use;
 133         u16 next_to_clean;
 134
 135         u16 head;
 136         u16 tail;
 137
 138         /* array of buffer information structs */
 139         struct igbvf_buffer *buffer_info;
 140         struct napi_struct napi;
 141
 142         char name[IFNAMSIZ + 5];
 143         u32 eims_value;
 144         u32 itr_val;
 145         enum latency_range itr_range;
 146         u16 itr_register;
 147         int set_itr;
 148
 149         struct sk_buff *rx_skb_top;
 150
 151         struct igbvf_queue_stats stats;
 152 };
 153
 154 /* board specific private data structure */
 155 struct igbvf_adapter {
 156         struct timer_list watchdog_timer;
 157         struct timer_list blink_timer;
 158
 159         struct work_struct reset_task;
 160         struct work_struct watchdog_task;
 161
 162         const struct igbvf_info *ei;
 163
 164         unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 165         u32 bd_number;
 166         u32 rx_buffer_len;
 167         u32 polling_interval;
 168         u16 mng_vlan_id;
 169         u16 link_speed;
 170         u16 link_duplex;
 171
 172         spinlock_t tx_queue_lock; /* prevent concurrent tail updates */
 173
 174         /* track device up/down/testing state */
 175         unsigned long state;
 176
 177         /* Interrupt Throttle Rate */
 178         u32 requested_itr; /* ints/sec or adaptive */
 179         u32 current_itr; /* Actual ITR register value, not ints/sec */
 180
 181         /* Tx */
 182         struct igbvf_ring *tx_ring /* One per active queue */
 183         ____cacheline_aligned_in_smp;
 184
 185         unsigned int restart_queue;
 186         u32 txd_cmd;
 187
 188         u32 tx_int_delay;
 189         u32 tx_abs_int_delay;
 190
 191         unsigned int total_tx_bytes;
 192         unsigned int total_tx_packets;
 193         unsigned int total_rx_bytes;
 194         unsigned int total_rx_packets;
 195
 196         /* Tx stats */
 197         u32 tx_timeout_count;
 198         u32 tx_fifo_head;
 199         u32 tx_head_addr;
 200         u32 tx_fifo_size;
 201         u32 tx_dma_failed;
 202
 203         /* Rx */
 204         struct igbvf_ring *rx_ring;
 205
 206         u32 rx_int_delay;
 207         u32 rx_abs_int_delay;
 208
 209         /* Rx stats */
 210         u64 hw_csum_err;
 211         u64 hw_csum_good;
 212         u64 rx_hdr_split;
 213         u32 alloc_rx_buff_failed;
 214         u32 rx_dma_failed;
 215
 216         unsigned int rx_ps_hdr_size;
 217         u32 max_frame_size;
 218         u32 min_frame_size;
 219
 220         /* OS defined structs */
 221         struct net_device *netdev;
 222         struct pci_dev *pdev;
 223         spinlock_t stats_lock; /* prevent concurrent stats updates */
 224
 225         /* structs defined in e1000_hw.h */
 226         struct e1000_hw hw;
 227
 228         /* The VF counters don't clear on read so we have to get a base
 229          * count on driver start up and always subtract that base on
 230          * on the first update, thus the flag..
 231          */
 232         struct e1000_vf_stats stats;
 233         u64 zero_base;
 234
 235         struct igbvf_ring test_tx_ring;
 236         struct igbvf_ring test_rx_ring;
 237         u32 test_icr;
 238
 239         u32 msg_enable;
 240         struct msix_entry *msix_entries;
 241         int int_mode;
 242         u32 eims_enable_mask;
 243         u32 eims_other;
 244         u32 int_counter0;
 245         u32 int_counter1;
 246
 247         u32 eeprom_wol;
 248         u32 wol;
 249         u32 pba;
 250
 251         bool fc_autoneg;
 252
 253         unsigned long led_status;
 254
 255         unsigned int flags;
 256         unsigned long last_reset;
 257 };
 258
 259 struct igbvf_info {
 260         enum e1000_mac_type     mac;
 261         unsigned int            flags;
 262         u32                     pba;
 263         void                    (*init_ops)(struct e1000_hw *);
 264         s32                     (*get_variants)(struct igbvf_adapter *);
 265 };
 266
 267 /* hardware capability, feature, and workaround flags */
 268 #define IGBVF_FLAG_RX_CSUM_DISABLED     BIT(0)
 269 #define IGBVF_FLAG_RX_LB_VLAN_BSWAP     BIT(1)
 270 #define IGBVF_RX_DESC_ADV(R, i)     \
 271         (&((((R).desc))[i].rx_desc))
 272 #define IGBVF_TX_DESC_ADV(R, i)     \
 273         (&((((R).desc))[i].tx_desc))
 274 #define IGBVF_TX_CTXTDESC_ADV(R, i) \
 275         (&((((R).desc))[i].tx_context_desc))
 276
 277 enum igbvf_state_t {
 278         __IGBVF_TESTING,
 279         __IGBVF_RESETTING,
 280         __IGBVF_DOWN
 281 };
 282
 283 extern char igbvf_driver_name[];
 284
 285 void igbvf_check_options(struct igbvf_adapter *);
 286 void igbvf_set_ethtool_ops(struct net_device *);
 287
 288 int igbvf_up(struct igbvf_adapter *);
 289 void igbvf_down(struct igbvf_adapter *);
 290 void igbvf_reinit_locked(struct igbvf_adapter *);
 291 int igbvf_setup_rx_resources(struct igbvf_adapter *, struct igbvf_ring *);
 292 int igbvf_setup_tx_resources(struct igbvf_adapter *, struct igbvf_ring *);
 293 void igbvf_free_rx_resources(struct igbvf_ring *);
 294 void igbvf_free_tx_resources(struct igbvf_ring *);
 295 void igbvf_update_stats(struct igbvf_adapter *);
 296
 297 extern unsigned int copybreak;
 298
 299 #endif /* _IGBVF_H_ */