drivers/net/ethernet/cavium/thunder/nic.h

   1 /*
   2  * Copyright (C) 2015 Cavium, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License
   6  * as published by the Free Software Foundation.
   7  */
   8
   9 #ifndef NIC_H
  10 #define NIC_H
  11
  12 #include <linux/netdevice.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/pci.h>
  15 #include "thunder_bgx.h"
  16
  17 /* PCI device IDs */
  18 #define PCI_DEVICE_ID_THUNDER_NIC_PF            0xA01E
  19 #define PCI_DEVICE_ID_THUNDER_PASS1_NIC_VF      0x0011
  20 #define PCI_DEVICE_ID_THUNDER_NIC_VF            0xA034
  21 #define PCI_DEVICE_ID_THUNDER_BGX               0xA026
  22
  23 /* PCI BAR nos */
  24 #define PCI_CFG_REG_BAR_NUM             0
  25 #define PCI_MSIX_REG_BAR_NUM            4
  26
  27 /* NIC SRIOV VF count */
  28 #define MAX_NUM_VFS_SUPPORTED           128
  29 #define DEFAULT_NUM_VF_ENABLED          8
  30
  31 #define NIC_TNS_BYPASS_MODE             0
  32 #define NIC_TNS_MODE                    1
  33
  34 /* NIC priv flags */
  35 #define NIC_SRIOV_ENABLED               BIT(0)
  36
  37 /* Min/Max packet size */
  38 #define NIC_HW_MIN_FRS                  64
  39 #define NIC_HW_MAX_FRS                  9200 /* 9216 max packet including FCS */
  40
  41 /* Max pkinds */
  42 #define NIC_MAX_PKIND                   16
  43
  44 /* Rx Channels */
  45 /* Receive channel configuration in TNS bypass mode
  46  * Below is configuration in TNS bypass mode
  47  * BGX0-LMAC0-CHAN0 - VNIC CHAN0
  48  * BGX0-LMAC1-CHAN0 - VNIC CHAN16
  49  * ...
  50  * BGX1-LMAC0-CHAN0 - VNIC CHAN128
  51  * ...
  52  * BGX1-LMAC3-CHAN0 - VNIC CHAN174
  53  */
  54 #define NIC_INTF_COUNT                  2  /* Interfaces btw VNIC and TNS/BGX */
  55 #define NIC_CHANS_PER_INF               128
  56 #define NIC_MAX_CHANS                   (NIC_INTF_COUNT * NIC_CHANS_PER_INF)
  57 #define NIC_CPI_COUNT                   2048 /* No of channel parse indices */
  58
  59 /* TNS bypass mode: 1-1 mapping between VNIC and BGX:LMAC */
  60 #define NIC_MAX_BGX                     MAX_BGX_PER_CN88XX
  61 #define NIC_CPI_PER_BGX                 (NIC_CPI_COUNT / NIC_MAX_BGX)
  62 #define NIC_MAX_CPI_PER_LMAC            64 /* Max when CPI_ALG is IP diffserv */
  63 #define NIC_RSSI_PER_BGX                (NIC_RSSI_COUNT / NIC_MAX_BGX)
  64
  65 /* Tx scheduling */
  66 #define NIC_MAX_TL4                     1024
  67 #define NIC_MAX_TL4_SHAPERS             256 /* 1 shaper for 4 TL4s */
  68 #define NIC_MAX_TL3                     256
  69 #define NIC_MAX_TL3_SHAPERS             64  /* 1 shaper for 4 TL3s */
  70 #define NIC_MAX_TL2                     64
  71 #define NIC_MAX_TL2_SHAPERS             2  /* 1 shaper for 32 TL2s */
  72 #define NIC_MAX_TL1                     2
  73
  74 /* TNS bypass mode */
  75 #define NIC_TL2_PER_BGX                 32
  76 #define NIC_TL4_PER_BGX                 (NIC_MAX_TL4 / NIC_MAX_BGX)
  77 #define NIC_TL4_PER_LMAC                (NIC_MAX_TL4 / NIC_CHANS_PER_INF)
  78
  79 /* NIC VF Interrupts */
  80 #define NICVF_INTR_CQ                   0
  81 #define NICVF_INTR_SQ                   1
  82 #define NICVF_INTR_RBDR                 2
  83 #define NICVF_INTR_PKT_DROP             3
  84 #define NICVF_INTR_TCP_TIMER            4
  85 #define NICVF_INTR_MBOX                 5
  86 #define NICVF_INTR_QS_ERR               6
  87
  88 #define NICVF_INTR_CQ_SHIFT             0
  89 #define NICVF_INTR_SQ_SHIFT             8
  90 #define NICVF_INTR_RBDR_SHIFT           16
  91 #define NICVF_INTR_PKT_DROP_SHIFT       20
  92 #define NICVF_INTR_TCP_TIMER_SHIFT      21
  93 #define NICVF_INTR_MBOX_SHIFT           22
  94 #define NICVF_INTR_QS_ERR_SHIFT         23
  95
  96 #define NICVF_INTR_CQ_MASK              (0xFF << NICVF_INTR_CQ_SHIFT)
  97 #define NICVF_INTR_SQ_MASK              (0xFF << NICVF_INTR_SQ_SHIFT)
  98 #define NICVF_INTR_RBDR_MASK            (0x03 << NICVF_INTR_RBDR_SHIFT)
  99 #define NICVF_INTR_PKT_DROP_MASK        BIT(NICVF_INTR_PKT_DROP_SHIFT)
 100 #define NICVF_INTR_TCP_TIMER_MASK       BIT(NICVF_INTR_TCP_TIMER_SHIFT)
 101 #define NICVF_INTR_MBOX_MASK            BIT(NICVF_INTR_MBOX_SHIFT)
 102 #define NICVF_INTR_QS_ERR_MASK          BIT(NICVF_INTR_QS_ERR_SHIFT)
 103
 104 /* MSI-X interrupts */
 105 #define NIC_PF_MSIX_VECTORS             10
 106 #define NIC_VF_MSIX_VECTORS             20
 107
 108 #define NIC_PF_INTR_ID_ECC0_SBE         0
 109 #define NIC_PF_INTR_ID_ECC0_DBE         1
 110 #define NIC_PF_INTR_ID_ECC1_SBE         2
 111 #define NIC_PF_INTR_ID_ECC1_DBE         3
 112 #define NIC_PF_INTR_ID_ECC2_SBE         4
 113 #define NIC_PF_INTR_ID_ECC2_DBE         5
 114 #define NIC_PF_INTR_ID_ECC3_SBE         6
 115 #define NIC_PF_INTR_ID_ECC3_DBE         7
 116 #define NIC_PF_INTR_ID_MBOX0            8
 117 #define NIC_PF_INTR_ID_MBOX1            9
 118
 119 /* Global timer for CQ timer thresh interrupts
 120  * Calculated for SCLK of 700Mhz
 121  * value written should be a 1/16th of what is expected
 122  *
 123  * 1 tick per 0.05usec = value of 2.2
 124  * This 10% would be covered in CQ timer thresh value
 125  */
 126 #define NICPF_CLK_PER_INT_TICK          2
 127
 128 /* Time to wait before we decide that a SQ is stuck.
 129  *
 130  * Since both pkt rx and tx notifications are done with same CQ,
 131  * when packets are being received at very high rate (eg: L2 forwarding)
 132  * then freeing transmitted skbs will be delayed and watchdog
 133  * will kick in, resetting interface. Hence keeping this value high.
 134  */
 135 #define NICVF_TX_TIMEOUT                (50 * HZ)
 136
 137 struct nicvf_cq_poll {
 138         u8      cq_idx;         /* Completion queue index */
 139         struct  napi_struct napi;
 140 };
 141
 142 #define NIC_RSSI_COUNT                  4096 /* Total no of RSS indices */
 143 #define NIC_MAX_RSS_HASH_BITS           8
 144 #define NIC_MAX_RSS_IDR_TBL_SIZE        (1 << NIC_MAX_RSS_HASH_BITS)
 145 #define RSS_HASH_KEY_SIZE               5 /* 320 bit key */
 146
 147 struct nicvf_rss_info {
 148         bool enable;
 149 #define RSS_L2_EXTENDED_HASH_ENA        BIT(0)
 150 #define RSS_IP_HASH_ENA                 BIT(1)
 151 #define RSS_TCP_HASH_ENA                BIT(2)
 152 #define RSS_TCP_SYN_DIS                 BIT(3)
 153 #define RSS_UDP_HASH_ENA                BIT(4)
 154 #define RSS_L4_EXTENDED_HASH_ENA        BIT(5)
 155 #define RSS_ROCE_ENA                    BIT(6)
 156 #define RSS_L3_BI_DIRECTION_ENA         BIT(7)
 157 #define RSS_L4_BI_DIRECTION_ENA         BIT(8)
 158         u64 cfg;
 159         u8  hash_bits;
 160         u16 rss_size;
 161         u8  ind_tbl[NIC_MAX_RSS_IDR_TBL_SIZE];
 162         u64 key[RSS_HASH_KEY_SIZE];
 163 } ____cacheline_aligned_in_smp;
 164
 165 enum rx_stats_reg_offset {
 166         RX_OCTS = 0x0,
 167         RX_UCAST = 0x1,
 168         RX_BCAST = 0x2,
 169         RX_MCAST = 0x3,
 170         RX_RED = 0x4,
 171         RX_RED_OCTS = 0x5,
 172         RX_ORUN = 0x6,
 173         RX_ORUN_OCTS = 0x7,
 174         RX_FCS = 0x8,
 175         RX_L2ERR = 0x9,
 176         RX_DRP_BCAST = 0xa,
 177         RX_DRP_MCAST = 0xb,
 178         RX_DRP_L3BCAST = 0xc,
 179         RX_DRP_L3MCAST = 0xd,
 180         RX_STATS_ENUM_LAST,
 181 };
 182
 183 enum tx_stats_reg_offset {
 184         TX_OCTS = 0x0,
 185         TX_UCAST = 0x1,
 186         TX_BCAST = 0x2,
 187         TX_MCAST = 0x3,
 188         TX_DROP = 0x4,
 189         TX_STATS_ENUM_LAST,
 190 };
 191
 192 struct nicvf_hw_stats {
 193         u64 rx_bytes_ok;
 194         u64 rx_ucast_frames_ok;
 195         u64 rx_bcast_frames_ok;
 196         u64 rx_mcast_frames_ok;
 197         u64 rx_fcs_errors;
 198         u64 rx_l2_errors;
 199         u64 rx_drop_red;
 200         u64 rx_drop_red_bytes;
 201         u64 rx_drop_overrun;
 202         u64 rx_drop_overrun_bytes;
 203         u64 rx_drop_bcast;
 204         u64 rx_drop_mcast;
 205         u64 rx_drop_l3_bcast;
 206         u64 rx_drop_l3_mcast;
 207         u64 tx_bytes_ok;
 208         u64 tx_ucast_frames_ok;
 209         u64 tx_bcast_frames_ok;
 210         u64 tx_mcast_frames_ok;
 211         u64 tx_drops;
 212 };
 213
 214 struct nicvf_drv_stats {
 215         /* Rx */
 216         u64 rx_frames_ok;
 217         u64 rx_frames_64;
 218         u64 rx_frames_127;
 219         u64 rx_frames_255;
 220         u64 rx_frames_511;
 221         u64 rx_frames_1023;
 222         u64 rx_frames_1518;
 223         u64 rx_frames_jumbo;
 224         u64 rx_drops;
 225         /* Tx */
 226         u64 tx_frames_ok;
 227         u64 tx_drops;
 228         u64 tx_tso;
 229         u64 txq_stop;
 230         u64 txq_wake;
 231 };
 232
 233 struct nicvf {
 234         struct net_device       *netdev;
 235         struct pci_dev          *pdev;
 236         u8                      vf_id;
 237         u8                      node;
 238         u8                      tns_mode;
 239         u16                     mtu;
 240         struct queue_set        *qs;
 241         void __iomem            *reg_base;
 242         bool                    link_up;
 243         u8                      duplex;
 244         u32                     speed;
 245         struct page             *rb_page;
 246         u32                     rb_page_offset;
 247         bool                    rb_alloc_fail;
 248         bool                    rb_work_scheduled;
 249         struct delayed_work     rbdr_work;
 250         struct tasklet_struct   rbdr_task;
 251         struct tasklet_struct   qs_err_task;
 252         struct tasklet_struct   cq_task;
 253         struct nicvf_cq_poll    *napi[8];
 254         struct nicvf_rss_info   rss_info;
 255         u8                      cpi_alg;
 256         /* Interrupt coalescing settings */
 257         u32                     cq_coalesce_usecs;
 258
 259         u32                     msg_enable;
 260         struct nicvf_hw_stats   stats;
 261         struct nicvf_drv_stats  drv_stats;
 262         struct bgx_stats        bgx_stats;
 263         struct work_struct      reset_task;
 264
 265         /* MSI-X  */
 266         bool                    msix_enabled;
 267         u8                      num_vec;
 268         struct msix_entry       msix_entries[NIC_VF_MSIX_VECTORS];
 269         char                    irq_name[NIC_VF_MSIX_VECTORS][20];
 270         bool                    irq_allocated[NIC_VF_MSIX_VECTORS];
 271
 272         bool                    pf_ready_to_rcv_msg;
 273         bool                    pf_acked;
 274         bool                    pf_nacked;
 275         bool                    bgx_stats_acked;
 276         bool                    set_mac_pending;
 277 } ____cacheline_aligned_in_smp;
 278
 279 /* PF <--> VF Mailbox communication
 280  * Eight 64bit registers are shared between PF and VF.
 281  * Separate set for each VF.
 282  * Writing '1' into last register mbx7 means end of message.
 283  */
 284
 285 /* PF <--> VF mailbox communication */
 286 #define NIC_PF_VF_MAILBOX_SIZE          2
 287 #define NIC_MBOX_MSG_TIMEOUT            2000 /* ms */
 288
 289 /* Mailbox message types */
 290 #define NIC_MBOX_MSG_READY              0x01    /* Is PF ready to rcv msgs */
 291 #define NIC_MBOX_MSG_ACK                0x02    /* ACK the message received */
 292 #define NIC_MBOX_MSG_NACK               0x03    /* NACK the message received */
 293 #define NIC_MBOX_MSG_QS_CFG             0x04    /* Configure Qset */
 294 #define NIC_MBOX_MSG_RQ_CFG             0x05    /* Configure receive queue */
 295 #define NIC_MBOX_MSG_SQ_CFG             0x06    /* Configure Send queue */
 296 #define NIC_MBOX_MSG_RQ_DROP_CFG        0x07    /* Configure receive queue */
 297 #define NIC_MBOX_MSG_SET_MAC            0x08    /* Add MAC ID to DMAC filter */
 298 #define NIC_MBOX_MSG_SET_MAX_FRS        0x09    /* Set max frame size */
 299 #define NIC_MBOX_MSG_CPI_CFG            0x0A    /* Config CPI, RSSI */
 300 #define NIC_MBOX_MSG_RSS_SIZE           0x0B    /* Get RSS indir_tbl size */
 301 #define NIC_MBOX_MSG_RSS_CFG            0x0C    /* Config RSS table */
 302 #define NIC_MBOX_MSG_RSS_CFG_CONT       0x0D    /* RSS config continuation */
 303 #define NIC_MBOX_MSG_RQ_BP_CFG          0x0E    /* RQ backpressure config */
 304 #define NIC_MBOX_MSG_RQ_SW_SYNC         0x0F    /* Flush inflight pkts to RQ */
 305 #define NIC_MBOX_MSG_BGX_STATS          0x10    /* Get stats from BGX */
 306 #define NIC_MBOX_MSG_BGX_LINK_CHANGE    0x11    /* BGX:LMAC link status */
 307 #define NIC_MBOX_MSG_CFG_DONE           0x12    /* VF configuration done */
 308 #define NIC_MBOX_MSG_SHUTDOWN           0x13    /* VF is being shutdown */
 309
 310 struct nic_cfg_msg {
 311         u8    msg;
 312         u8    vf_id;
 313         u8    tns_mode;
 314         u8    node_id;
 315         u8    mac_addr[ETH_ALEN];
 316 };
 317
 318 /* Qset configuration */
 319 struct qs_cfg_msg {
 320         u8    msg;
 321         u8    num;
 322         u64   cfg;
 323 };
 324
 325 /* Receive queue configuration */
 326 struct rq_cfg_msg {
 327         u8    msg;
 328         u8    qs_num;
 329         u8    rq_num;
 330         u64   cfg;
 331 };
 332
 333 /* Send queue configuration */
 334 struct sq_cfg_msg {
 335         u8    msg;
 336         u8    qs_num;
 337         u8    sq_num;
 338         u64   cfg;
 339 };
 340
 341 /* Set VF's MAC address */
 342 struct set_mac_msg {
 343         u8    msg;
 344         u8    vf_id;
 345         u8    mac_addr[ETH_ALEN];
 346 };
 347
 348 /* Set Maximum frame size */
 349 struct set_frs_msg {
 350         u8    msg;
 351         u8    vf_id;
 352         u16   max_frs;
 353 };
 354
 355 /* Set CPI algorithm type */
 356 struct cpi_cfg_msg {
 357         u8    msg;
 358         u8    vf_id;
 359         u8    rq_cnt;
 360         u8    cpi_alg;
 361 };
 362
 363 /* Get RSS table size */
 364 struct rss_sz_msg {
 365         u8    msg;
 366         u8    vf_id;
 367         u16   ind_tbl_size;
 368 };
 369
 370 /* Set RSS configuration */
 371 struct rss_cfg_msg {
 372         u8    msg;
 373         u8    vf_id;
 374         u8    hash_bits;
 375         u8    tbl_len;
 376         u8    tbl_offset;
 377 #define RSS_IND_TBL_LEN_PER_MBX_MSG     8
 378         u8    ind_tbl[RSS_IND_TBL_LEN_PER_MBX_MSG];
 379 };
 380
 381 struct bgx_stats_msg {
 382         u8    msg;
 383         u8    vf_id;
 384         u8    rx;
 385         u8    idx;
 386         u64   stats;
 387 };
 388
 389 /* Physical interface link status */
 390 struct bgx_link_status {
 391         u8    msg;
 392         u8    link_up;
 393         u8    duplex;
 394         u32   speed;
 395 };
 396
 397 /* 128 bit shared memory between PF and each VF */
 398 union nic_mbx {
 399         struct { u8 msg; }      msg;
 400         struct nic_cfg_msg      nic_cfg;
 401         struct qs_cfg_msg       qs;
 402         struct rq_cfg_msg       rq;
 403         struct sq_cfg_msg       sq;
 404         struct set_mac_msg      mac;
 405         struct set_frs_msg      frs;
 406         struct cpi_cfg_msg      cpi_cfg;
 407         struct rss_sz_msg       rss_size;
 408         struct rss_cfg_msg      rss_cfg;
 409         struct bgx_stats_msg    bgx_stats;
 410         struct bgx_link_status  link_status;
 411 };
 412
 413 #define NIC_NODE_ID_MASK        0x03
 414 #define NIC_NODE_ID_SHIFT       44
 415
 416 static inline int nic_get_node_id(struct pci_dev *pdev)
 417 {
 418         u64 addr = pci_resource_start(pdev, PCI_CFG_REG_BAR_NUM);
 419         return ((addr >> NIC_NODE_ID_SHIFT) & NIC_NODE_ID_MASK);
 420 }
 421
 422 int nicvf_set_real_num_queues(struct net_device *netdev,
 423                               int tx_queues, int rx_queues);
 424 int nicvf_open(struct net_device *netdev);
 425 int nicvf_stop(struct net_device *netdev);
 426 int nicvf_send_msg_to_pf(struct nicvf *vf, union nic_mbx *mbx);
 427 void nicvf_config_rss(struct nicvf *nic);
 428 void nicvf_set_rss_key(struct nicvf *nic);
 429 void nicvf_set_ethtool_ops(struct net_device *netdev);
 430 void nicvf_update_stats(struct nicvf *nic);
 431 void nicvf_update_lmac_stats(struct nicvf *nic);
 432
 433 #endif /* NIC_H */