drivers/net/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
  28 /* Fix for IA64 */
  29 #include <asm/checksum.h>
  30 #include <net/ip6_checksum.h>
  31
  32 #include <net/ip.h>
  33 #include <net/tcp.h>
  34
  35 #include "bna.h"
  36
  37 #define BNAD_TXQ_DEPTH          2048
  38 #define BNAD_RXQ_DEPTH          2048
  39
  40 #define BNAD_MAX_TXS            1
  41 #define BNAD_MAX_TXQ_PER_TX     8       /* 8 priority queues */
  42 #define BNAD_TXQ_NUM            1
  43
  44 #define BNAD_MAX_RXS            1
  45 #define BNAD_MAX_RXPS_PER_RX    16
  46
  47 /*
  48  * Control structure pointed to ccb->ctrl, which
  49  * determines the NAPI / LRO behavior CCB
  50  * There is 1:1 corres. between ccb & ctrl
  51  */
  52 struct bnad_rx_ctrl {
  53         struct bna_ccb *ccb;
  54         unsigned long  flags;
  55         struct napi_struct      napi;
  56 };
  57
  58 #define BNAD_RXMODE_PROMISC_DEFAULT     BNA_RXMODE_PROMISC
  59
  60 #define BNAD_GET_TX_ID(_skb)    (0)
  61
  62 /*
  63  * GLOBAL #defines (CONSTANTS)
  64  */
  65 #define BNAD_NAME                       "bna"
  66 #define BNAD_NAME_LEN                   64
  67
  68 #define BNAD_VERSION                    "2.3.2.3"
  69
  70 #define BNAD_MAILBOX_MSIX_VECTORS       1
  71
  72 #define BNAD_STATS_TIMER_FREQ           1000    /* in msecs */
  73 #define BNAD_DIM_TIMER_FREQ             1000    /* in msecs */
  74
  75 #define BNAD_MAX_Q_DEPTH                0x10000
  76 #define BNAD_MIN_Q_DEPTH                0x200
  77
  78 #define BNAD_JUMBO_MTU                  9000
  79
  80 #define BNAD_NETIF_WAKE_THRESHOLD       8
  81
  82 #define BNAD_RXQ_REFILL_THRESHOLD_SHIFT 3
  83
  84 /* Bit positions for tcb->flags */
  85 #define BNAD_TXQ_FREE_SENT              0
  86 #define BNAD_TXQ_TX_STARTED             1
  87
  88 /* Bit positions for rcb->flags */
  89 #define BNAD_RXQ_REFILL                 0
  90 #define BNAD_RXQ_STARTED                1
  91
  92 /*
  93  * DATA STRUCTURES
  94  */
  95
  96 /* enums */
  97 enum bnad_intr_source {
  98         BNAD_INTR_TX            = 1,
  99         BNAD_INTR_RX            = 2
 100 };
 101
 102 enum bnad_link_state {
 103         BNAD_LS_DOWN            = 0,
 104         BNAD_LS_UP              = 1
 105 };
 106
 107 struct bnad_completion {
 108         struct completion       ioc_comp;
 109         struct completion       ucast_comp;
 110         struct completion       mcast_comp;
 111         struct completion       tx_comp;
 112         struct completion       rx_comp;
 113         struct completion       stats_comp;
 114         struct completion       port_comp;
 115
 116         u8                      ioc_comp_status;
 117         u8                      ucast_comp_status;
 118         u8                      mcast_comp_status;
 119         u8                      tx_comp_status;
 120         u8                      rx_comp_status;
 121         u8                      stats_comp_status;
 122         u8                      port_comp_status;
 123 };
 124
 125 /* Tx Rx Control Stats */
 126 struct bnad_drv_stats {
 127         u64             netif_queue_stop;
 128         u64             netif_queue_wakeup;
 129         u64             netif_queue_stopped;
 130         u64             tso4;
 131         u64             tso6;
 132         u64             tso_err;
 133         u64             tcpcsum_offload;
 134         u64             udpcsum_offload;
 135         u64             csum_help;
 136         u64             csum_help_err;
 137
 138         u64             hw_stats_updates;
 139         u64             netif_rx_schedule;
 140         u64             netif_rx_complete;
 141         u64             netif_rx_dropped;
 142
 143         u64             link_toggle;
 144         u64             cee_up;
 145
 146         u64             rxp_info_alloc_failed;
 147         u64             mbox_intr_disabled;
 148         u64             mbox_intr_enabled;
 149         u64             tx_unmap_q_alloc_failed;
 150         u64             rx_unmap_q_alloc_failed;
 151
 152         u64             rxbuf_alloc_failed;
 153 };
 154
 155 /* Complete driver stats */
 156 struct bnad_stats {
 157         struct bnad_drv_stats drv_stats;
 158         struct bna_stats *bna_stats;
 159 };
 160
 161 /* Tx / Rx Resources */
 162 struct bnad_tx_res_info {
 163         struct bna_res_info res_info[BNA_TX_RES_T_MAX];
 164 };
 165
 166 struct bnad_rx_res_info {
 167         struct bna_res_info res_info[BNA_RX_RES_T_MAX];
 168 };
 169
 170 struct bnad_tx_info {
 171         struct bna_tx *tx; /* 1:1 between tx_info & tx */
 172         struct bna_tcb *tcb[BNAD_MAX_TXQ_PER_TX];
 173 } ____cacheline_aligned;
 174
 175 struct bnad_rx_info {
 176         struct bna_rx *rx; /* 1:1 between rx_info & rx */
 177
 178         struct bnad_rx_ctrl rx_ctrl[BNAD_MAX_RXPS_PER_RX];
 179 } ____cacheline_aligned;
 180
 181 /* Unmap queues for Tx / Rx cleanup */
 182 struct bnad_skb_unmap {
 183         struct sk_buff          *skb;
 184         DEFINE_DMA_UNMAP_ADDR(dma_addr);
 185 };
 186
 187 struct bnad_unmap_q {
 188         u32             producer_index;
 189         u32             consumer_index;
 190         u32             q_depth;
 191         /* This should be the last one */
 192         struct bnad_skb_unmap unmap_array[1];
 193 };
 194
 195 /* Bit mask values for bnad->cfg_flags */
 196 #define BNAD_CF_DIM_ENABLED             0x01    /* DIM */
 197 #define BNAD_CF_PROMISC                 0x02
 198 #define BNAD_CF_ALLMULTI                0x04
 199 #define BNAD_CF_MSIX                    0x08    /* If in MSIx mode */
 200
 201 /* Defines for run_flags bit-mask */
 202 /* Set, tested & cleared using xxx_bit() functions */
 203 /* Values indicated bit positions */
 204 #define BNAD_RF_CEE_RUNNING             1
 205 #define BNAD_RF_MBOX_IRQ_DISABLED       2
 206 #define BNAD_RF_RX_STARTED              3
 207 #define BNAD_RF_DIM_TIMER_RUNNING       4
 208 #define BNAD_RF_STATS_TIMER_RUNNING     5
 209 #define BNAD_RF_TX_SHUTDOWN_DELAYED     6
 210 #define BNAD_RF_RX_SHUTDOWN_DELAYED     7
 211
 212 struct bnad {
 213         struct net_device       *netdev;
 214
 215         /* Data path */
 216         struct bnad_tx_info tx_info[BNAD_MAX_TXS];
 217         struct bnad_rx_info rx_info[BNAD_MAX_RXS];
 218
 219         struct vlan_group       *vlan_grp;
 220         /*
 221          * These q numbers are global only because
 222          * they are used to calculate MSIx vectors.
 223          * Actually the exact # of queues are per Tx/Rx
 224          * object.
 225          */
 226         u32             num_tx;
 227         u32             num_rx;
 228         u32             num_txq_per_tx;
 229         u32             num_rxp_per_rx;
 230
 231         u32             txq_depth;
 232         u32             rxq_depth;
 233
 234         u8                      tx_coalescing_timeo;
 235         u8                      rx_coalescing_timeo;
 236
 237         struct bna_rx_config rx_config[BNAD_MAX_RXS];
 238         struct bna_tx_config tx_config[BNAD_MAX_TXS];
 239
 240         u32             rx_csum;
 241
 242         void __iomem            *bar0;  /* BAR0 address */
 243
 244         struct bna bna;
 245
 246         u32             cfg_flags;
 247         unsigned long           run_flags;
 248
 249         struct pci_dev          *pcidev;
 250         u64             mmio_start;
 251         u64             mmio_len;
 252
 253         u32             msix_num;
 254         struct msix_entry       *msix_table;
 255
 256         struct mutex            conf_mutex;
 257         spinlock_t              bna_lock ____cacheline_aligned;
 258
 259         /* Timers */
 260         struct timer_list       ioc_timer;
 261         struct timer_list       dim_timer;
 262         struct timer_list       stats_timer;
 263
 264         /* Control path resources, memory & irq */
 265         struct bna_res_info res_info[BNA_RES_T_MAX];
 266         struct bnad_tx_res_info tx_res_info[BNAD_MAX_TXS];
 267         struct bnad_rx_res_info rx_res_info[BNAD_MAX_RXS];
 268
 269         struct bnad_completion bnad_completions;
 270
 271         /* Burnt in MAC address */
 272         mac_t                   perm_addr;
 273
 274         struct tasklet_struct   tx_free_tasklet;
 275
 276         /* Statistics */
 277         struct bnad_stats stats;
 278
 279         struct bnad_diag *diag;
 280
 281         char                    adapter_name[BNAD_NAME_LEN];
 282         char                    port_name[BNAD_NAME_LEN];
 283         char                    mbox_irq_name[BNAD_NAME_LEN];
 284 };
 285
 286 /*
 287  * EXTERN VARIABLES
 288  */
 289 extern struct firmware *bfi_fw;
 290 extern u32              bnad_rxqs_per_cq;
 291
 292 /*
 293  * EXTERN PROTOTYPES
 294  */
 295 extern u32 *cna_get_firmware_buf(struct pci_dev *pdev);
 296 /* Netdev entry point prototypes */
 297 extern void bnad_set_ethtool_ops(struct net_device *netdev);
 298
 299 /* Configuration & setup */
 300 extern void bnad_tx_coalescing_timeo_set(struct bnad *bnad);
 301 extern void bnad_rx_coalescing_timeo_set(struct bnad *bnad);
 302
 303 extern int bnad_setup_rx(struct bnad *bnad, uint rx_id);
 304 extern int bnad_setup_tx(struct bnad *bnad, uint tx_id);
 305 extern void bnad_cleanup_tx(struct bnad *bnad, uint tx_id);
 306 extern void bnad_cleanup_rx(struct bnad *bnad, uint rx_id);
 307
 308 /* Timer start/stop protos */
 309 extern void bnad_dim_timer_start(struct bnad *bnad);
 310
 311 /* Statistics */
 312 extern void bnad_netdev_qstats_fill(struct bnad *bnad,
 313                 struct rtnl_link_stats64 *stats);
 314 extern void bnad_netdev_hwstats_fill(struct bnad *bnad,
 315                 struct rtnl_link_stats64 *stats);
 316
 317 /**
 318  * MACROS
 319  */
 320 /* To set & get the stats counters */
 321 #define BNAD_UPDATE_CTR(_bnad, _ctr)                            \
 322                                 (((_bnad)->stats.drv_stats._ctr)++)
 323
 324 #define BNAD_GET_CTR(_bnad, _ctr) ((_bnad)->stats.drv_stats._ctr)
 325
 326 #define bnad_enable_rx_irq_unsafe(_ccb)                 \
 327 {                                                       \
 328         if (likely(test_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags))) {\
 329                 bna_ib_coalescing_timer_set((_ccb)->i_dbell,    \
 330                         (_ccb)->rx_coalescing_timeo);           \
 331                 bna_ib_ack((_ccb)->i_dbell, 0);                 \
 332         }                                                       \
 333 }
 334
 335 #define bnad_dim_timer_running(_bnad)                           \
 336         (((_bnad)->cfg_flags & BNAD_CF_DIM_ENABLED) &&          \
 337         (test_bit(BNAD_RF_DIM_TIMER_RUNNING, &((_bnad)->run_flags))))
 338
 339 #endif /* __BNAD_H__ */