drivers/net/ethernet/brocade/bna/bnad.h

   1 /*
   2  * Linux network driver for Brocade Converged Network Adapter.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License (GPL) Version 2 as
   6  * published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  */
  13 /*
  14  * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
  15  * All rights reserved
  16  * www.brocade.com
  17  */
  18 #ifndef __BNAD_H__
  19 #define __BNAD_H__
  20
  21 #include <linux/rtnetlink.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/ipv6.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/mutex.h>
  26 #include <linux/firmware.h>
  27 #include <linux/if_vlan.h>
  28
  29 /* Fix for IA64 */
  30 #include <asm/checksum.h>
  31 #include <net/ip6_checksum.h>
  32
  33 #include <net/ip.h>
  34 #include <net/tcp.h>
  35
  36 #include "bna.h"
  37
  38 #define BNAD_TXQ_DEPTH          2048
  39 #define BNAD_RXQ_DEPTH          2048
  40
  41 #define BNAD_MAX_TX             1
  42 #define BNAD_MAX_TXQ_PER_TX     8       /* 8 priority queues */
  43 #define BNAD_TXQ_NUM            1
  44
  45 #define BNAD_MAX_RX             1
  46 #define BNAD_MAX_RXP_PER_RX     16
  47 #define BNAD_MAX_RXQ_PER_RXP    2
  48
  49 /*
  50  * Control structure pointed to ccb->ctrl, which
  51  * determines the NAPI / LRO behavior CCB
  52  * There is 1:1 corres. between ccb & ctrl
  53  */
  54 struct bnad_rx_ctrl {
  55         struct bna_ccb *ccb;
  56         struct bnad *bnad;
  57         unsigned long  flags;
  58         struct napi_struct      napi;
  59         u64             rx_intr_ctr;
  60         u64             rx_poll_ctr;
  61         u64             rx_schedule;
  62         u64             rx_keep_poll;
  63         u64             rx_complete;
  64 };
  65
  66 #define BNAD_RXMODE_PROMISC_DEFAULT     BNA_RXMODE_PROMISC
  67
  68 /*
  69  * GLOBAL #defines (CONSTANTS)
  70  */
  71 #define BNAD_NAME                       "bna"
  72 #define BNAD_NAME_LEN                   64
  73
  74 #define BNAD_VERSION                    "3.0.2.2"
  75
  76 #define BNAD_MAILBOX_MSIX_INDEX         0
  77 #define BNAD_MAILBOX_MSIX_VECTORS       1
  78 #define BNAD_INTX_TX_IB_BITMASK         0x1
  79 #define BNAD_INTX_RX_IB_BITMASK         0x2
  80
  81 #define BNAD_STATS_TIMER_FREQ           1000    /* in msecs */
  82 #define BNAD_DIM_TIMER_FREQ             1000    /* in msecs */
  83
  84 #define BNAD_IOCETH_TIMEOUT          10000
  85
  86 #define BNAD_MAX_Q_DEPTH                0x10000
  87 #define BNAD_MIN_Q_DEPTH                0x200
  88
  89 #define BNAD_MAX_RXQ_DEPTH              (BNAD_MAX_Q_DEPTH / bnad_rxqs_per_cq)
  90 /* keeping MAX TX and RX Q depth equal */
  91 #define BNAD_MAX_TXQ_DEPTH              BNAD_MAX_RXQ_DEPTH
  92
  93 #define BNAD_JUMBO_MTU                  9000
  94
  95 #define BNAD_NETIF_WAKE_THRESHOLD       8
  96
  97 #define BNAD_RXQ_REFILL_THRESHOLD_SHIFT 3
  98
  99 /* Bit positions for tcb->flags */
 100 #define BNAD_TXQ_FREE_SENT              0
 101 #define BNAD_TXQ_TX_STARTED             1
 102
 103 /* Bit positions for rcb->flags */
 104 #define BNAD_RXQ_REFILL                 0
 105 #define BNAD_RXQ_STARTED                1
 106 #define BNAD_RXQ_POST_OK                2
 107
 108 /* Resource limits */
 109 #define BNAD_NUM_TXQ                    (bnad->num_tx * bnad->num_txq_per_tx)
 110 #define BNAD_NUM_RXP                    (bnad->num_rx * bnad->num_rxp_per_rx)
 111
 112 /*
 113  * DATA STRUCTURES
 114  */
 115
 116 /* enums */
 117 enum bnad_intr_source {
 118         BNAD_INTR_TX            = 1,
 119         BNAD_INTR_RX            = 2
 120 };
 121
 122 enum bnad_link_state {
 123         BNAD_LS_DOWN            = 0,
 124         BNAD_LS_UP              = 1
 125 };
 126
 127 struct bnad_completion {
 128         struct completion       ioc_comp;
 129         struct completion       ucast_comp;
 130         struct completion       mcast_comp;
 131         struct completion       tx_comp;
 132         struct completion       rx_comp;
 133         struct completion       stats_comp;
 134         struct completion       enet_comp;
 135         struct completion       mtu_comp;
 136
 137         u8                      ioc_comp_status;
 138         u8                      ucast_comp_status;
 139         u8                      mcast_comp_status;
 140         u8                      tx_comp_status;
 141         u8                      rx_comp_status;
 142         u8                      stats_comp_status;
 143         u8                      port_comp_status;
 144         u8                      mtu_comp_status;
 145 };
 146
 147 /* Tx Rx Control Stats */
 148 struct bnad_drv_stats {
 149         u64             netif_queue_stop;
 150         u64             netif_queue_wakeup;
 151         u64             netif_queue_stopped;
 152         u64             tso4;
 153         u64             tso6;
 154         u64             tso_err;
 155         u64             tcpcsum_offload;
 156         u64             udpcsum_offload;
 157         u64             csum_help;
 158         u64             tx_skb_too_short;
 159         u64             tx_skb_stopping;
 160         u64             tx_skb_max_vectors;
 161         u64             tx_skb_mss_too_long;
 162         u64             tx_skb_tso_too_short;
 163         u64             tx_skb_tso_prepare;
 164         u64             tx_skb_non_tso_too_long;
 165         u64             tx_skb_tcp_hdr;
 166         u64             tx_skb_udp_hdr;
 167         u64             tx_skb_csum_err;
 168         u64             tx_skb_headlen_too_long;
 169         u64             tx_skb_headlen_zero;
 170         u64             tx_skb_frag_zero;
 171         u64             tx_skb_len_mismatch;
 172
 173         u64             hw_stats_updates;
 174         u64             netif_rx_dropped;
 175
 176         u64             link_toggle;
 177         u64             cee_toggle;
 178
 179         u64             rxp_info_alloc_failed;
 180         u64             mbox_intr_disabled;
 181         u64             mbox_intr_enabled;
 182         u64             tx_unmap_q_alloc_failed;
 183         u64             rx_unmap_q_alloc_failed;
 184
 185         u64             rxbuf_alloc_failed;
 186 };
 187
 188 /* Complete driver stats */
 189 struct bnad_stats {
 190         struct bnad_drv_stats drv_stats;
 191         struct bna_stats *bna_stats;
 192 };
 193
 194 /* Tx / Rx Resources */
 195 struct bnad_tx_res_info {
 196         struct bna_res_info res_info[BNA_TX_RES_T_MAX];
 197 };
 198
 199 struct bnad_rx_res_info {
 200         struct bna_res_info res_info[BNA_RX_RES_T_MAX];
 201 };
 202
 203 struct bnad_tx_info {
 204         struct bna_tx *tx; /* 1:1 between tx_info & tx */
 205         struct bna_tcb *tcb[BNAD_MAX_TXQ_PER_TX];
 206         u32 tx_id;
 207 } ____cacheline_aligned;
 208
 209 struct bnad_rx_info {
 210         struct bna_rx *rx; /* 1:1 between rx_info & rx */
 211
 212         struct bnad_rx_ctrl rx_ctrl[BNAD_MAX_RXP_PER_RX];
 213         u32 rx_id;
 214 } ____cacheline_aligned;
 215
 216 /* Unmap queues for Tx / Rx cleanup */
 217 struct bnad_skb_unmap {
 218         struct sk_buff          *skb;
 219         DEFINE_DMA_UNMAP_ADDR(dma_addr);
 220 };
 221
 222 struct bnad_unmap_q {
 223         u32             producer_index;
 224         u32             consumer_index;
 225         u32             q_depth;
 226         /* This should be the last one */
 227         struct bnad_skb_unmap unmap_array[1];
 228 };
 229
 230 /* Bit mask values for bnad->cfg_flags */
 231 #define BNAD_CF_DIM_ENABLED             0x01    /* DIM */
 232 #define BNAD_CF_PROMISC                 0x02
 233 #define BNAD_CF_ALLMULTI                0x04
 234 #define BNAD_CF_MSIX                    0x08    /* If in MSIx mode */
 235
 236 /* Defines for run_flags bit-mask */
 237 /* Set, tested & cleared using xxx_bit() functions */
 238 /* Values indicated bit positions */
 239 #define BNAD_RF_CEE_RUNNING             0
 240 #define BNAD_RF_MTU_SET         1
 241 #define BNAD_RF_MBOX_IRQ_DISABLED       2
 242 #define BNAD_RF_NETDEV_REGISTERED       3
 243 #define BNAD_RF_DIM_TIMER_RUNNING       4
 244 #define BNAD_RF_STATS_TIMER_RUNNING     5
 245 #define BNAD_RF_TX_PRIO_SET             6
 246
 247
 248 /* Define for Fast Path flags */
 249 /* Defined as bit positions */
 250 #define BNAD_FP_IN_RX_PATH            0
 251
 252 struct bnad {
 253         struct net_device       *netdev;
 254
 255         /* Data path */
 256         struct bnad_tx_info tx_info[BNAD_MAX_TX];
 257         struct bnad_rx_info rx_info[BNAD_MAX_RX];
 258
 259         unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
 260         /*
 261          * These q numbers are global only because
 262          * they are used to calculate MSIx vectors.
 263          * Actually the exact # of queues are per Tx/Rx
 264          * object.
 265          */
 266         u32             num_tx;
 267         u32             num_rx;
 268         u32             num_txq_per_tx;
 269         u32             num_rxp_per_rx;
 270
 271         u32             txq_depth;
 272         u32             rxq_depth;
 273
 274         u8                      tx_coalescing_timeo;
 275         u8                      rx_coalescing_timeo;
 276
 277         struct bna_rx_config rx_config[BNAD_MAX_RX];
 278         struct bna_tx_config tx_config[BNAD_MAX_TX];
 279
 280         void __iomem            *bar0;  /* BAR0 address */
 281
 282         struct bna bna;
 283
 284         u32             cfg_flags;
 285         unsigned long           run_flags;
 286
 287         struct pci_dev          *pcidev;
 288         u64             mmio_start;
 289         u64             mmio_len;
 290
 291         u32             msix_num;
 292         struct msix_entry       *msix_table;
 293
 294         struct mutex            conf_mutex;
 295         spinlock_t              bna_lock ____cacheline_aligned;
 296
 297         /* Timers */
 298         struct timer_list       ioc_timer;
 299         struct timer_list       dim_timer;
 300         struct timer_list       stats_timer;
 301
 302         /* Control path resources, memory & irq */
 303         struct bna_res_info res_info[BNA_RES_T_MAX];
 304         struct bna_res_info mod_res_info[BNA_MOD_RES_T_MAX];
 305         struct bnad_tx_res_info tx_res_info[BNAD_MAX_TX];
 306         struct bnad_rx_res_info rx_res_info[BNAD_MAX_RX];
 307
 308         struct bnad_completion bnad_completions;
 309
 310         /* Burnt in MAC address */
 311         mac_t                   perm_addr;
 312
 313         struct tasklet_struct   tx_free_tasklet;
 314
 315         /* Statistics */
 316         struct bnad_stats stats;
 317
 318         struct bnad_diag *diag;
 319
 320         char                    adapter_name[BNAD_NAME_LEN];
 321         char                    port_name[BNAD_NAME_LEN];
 322         char                    mbox_irq_name[BNAD_NAME_LEN];
 323 };
 324
 325 /*
 326  * EXTERN VARIABLES
 327  */
 328 extern struct firmware *bfi_fw;
 329 extern u32              bnad_rxqs_per_cq;
 330
 331 /*
 332  * EXTERN PROTOTYPES
 333  */
 334 extern u32 *cna_get_firmware_buf(struct pci_dev *pdev);
 335 /* Netdev entry point prototypes */
 336 extern void bnad_set_rx_mode(struct net_device *netdev);
 337 extern struct net_device_stats *bnad_get_netdev_stats(
 338                                 struct net_device *netdev);
 339 extern int bnad_mac_addr_set_locked(struct bnad *bnad, u8 *mac_addr);
 340 extern int bnad_enable_default_bcast(struct bnad *bnad);
 341 extern void bnad_restore_vlans(struct bnad *bnad, u32 rx_id);
 342 extern void bnad_set_ethtool_ops(struct net_device *netdev);
 343
 344 /* Configuration & setup */
 345 extern void bnad_tx_coalescing_timeo_set(struct bnad *bnad);
 346 extern void bnad_rx_coalescing_timeo_set(struct bnad *bnad);
 347
 348 extern int bnad_setup_rx(struct bnad *bnad, u32 rx_id);
 349 extern int bnad_setup_tx(struct bnad *bnad, u32 tx_id);
 350 extern void bnad_cleanup_tx(struct bnad *bnad, u32 tx_id);
 351 extern void bnad_cleanup_rx(struct bnad *bnad, u32 rx_id);
 352
 353 /* Timer start/stop protos */
 354 extern void bnad_dim_timer_start(struct bnad *bnad);
 355
 356 /* Statistics */
 357 extern void bnad_netdev_qstats_fill(struct bnad *bnad,
 358                 struct rtnl_link_stats64 *stats);
 359 extern void bnad_netdev_hwstats_fill(struct bnad *bnad,
 360                 struct rtnl_link_stats64 *stats);
 361
 362 /**
 363  * MACROS
 364  */
 365 /* To set & get the stats counters */
 366 #define BNAD_UPDATE_CTR(_bnad, _ctr)                            \
 367                                 (((_bnad)->stats.drv_stats._ctr)++)
 368
 369 #define BNAD_GET_CTR(_bnad, _ctr) ((_bnad)->stats.drv_stats._ctr)
 370
 371 #define bnad_enable_rx_irq_unsafe(_ccb)                 \
 372 {                                                       \
 373         if (likely(test_bit(BNAD_RXQ_STARTED, &(_ccb)->rcb[0]->flags))) {\
 374                 bna_ib_coalescing_timer_set((_ccb)->i_dbell,    \
 375                         (_ccb)->rx_coalescing_timeo);           \
 376                 bna_ib_ack((_ccb)->i_dbell, 0);                 \
 377         }                                                       \
 378 }
 379
 380 #endif /* __BNAD_H__ */