release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/net/benet/be.h

   1 /*
   2  * Copyright (C) 2005 - 2010 ServerEngines
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation.  The full GNU General
   8  * Public License is included in this distribution in the file called COPYING.
   9  *
  10  * Contact Information:
  11  * linux-drivers@serverengines.com
  12  *
  13  * ServerEngines
  14  * 209 N. Fair Oaks Ave
  15  * Sunnyvale, CA 94085
  16  */
  17
  18 #ifndef BE_H
  19 #define BE_H
  20
  21 #include <linux/pci.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/version.h>
  24 #include <linux/delay.h>
  25 #include <net/tcp.h>
  26 #include <net/ip.h>
  27 #include <net/ipv6.h>
  28 #include <linux/if_vlan.h>
  29 #include <linux/workqueue.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/firmware.h>
  32 #include <linux/slab.h>
  33
  34 #include "be_hw.h"
  35
  36 #define DRV_VER                 "2.103.175u"
  37 #define DRV_NAME                "be2net"
  38 #define BE_NAME                 "ServerEngines BladeEngine2 10Gbps NIC"
  39 #define BE3_NAME                "ServerEngines BladeEngine3 10Gbps NIC"
  40 #define OC_NAME                 "Emulex OneConnect 10Gbps NIC"
  41 #define OC_NAME1                "Emulex OneConnect 10Gbps NIC (be3)"
  42 #define DRV_DESC                "ServerEngines BladeEngine 10Gbps NIC Driver"
  43
  44 #define BE_VENDOR_ID            0x19a2
  45 #define BE_DEVICE_ID1           0x211
  46 #define BE_DEVICE_ID2           0x221
  47 #define OC_DEVICE_ID1           0x700
  48 #define OC_DEVICE_ID2           0x710
  49
  50 static inline char *nic_name(struct pci_dev *pdev)
  51 {
  52         switch (pdev->device) {
  53         case OC_DEVICE_ID1:
  54                 return OC_NAME;
  55         case OC_DEVICE_ID2:
  56                 return OC_NAME1;
  57         case BE_DEVICE_ID2:
  58                 return BE3_NAME;
  59         default:
  60                 return BE_NAME;
  61         }
  62 }
  63
  64 /* Number of bytes of an RX frame that are copied to skb->data */
  65 #define BE_HDR_LEN              64
  66 #define BE_MAX_JUMBO_FRAME_SIZE 9018
  67 #define BE_MIN_MTU              256
  68
  69 #define BE_NUM_VLANS_SUPPORTED  64
  70 #define BE_MAX_EQD              96
  71 #define BE_MAX_TX_FRAG_COUNT    30
  72
  73 #define EVNT_Q_LEN              1024
  74 #define TX_Q_LEN                2048
  75 #define TX_CQ_LEN               1024
  76 #define RX_Q_LEN                1024    /* Does not support any other value */
  77 #define RX_CQ_LEN               1024
  78 #define MCC_Q_LEN               128     /* total size not to exceed 8 pages */
  79 #define MCC_CQ_LEN              256
  80
  81 #define BE_NAPI_WEIGHT          64
  82 #define MAX_RX_POST             BE_NAPI_WEIGHT /* Frags posted at a time */
  83 #define RX_FRAGS_REFILL_WM      (RX_Q_LEN - MAX_RX_POST)
  84
  85 #define FW_VER_LEN              32
  86
  87 #define BE_MAX_VF               32
  88
  89 struct be_dma_mem {
  90         void *va;
  91         dma_addr_t dma;
  92         u32 size;
  93 };
  94
  95 struct be_queue_info {
  96         struct be_dma_mem dma_mem;
  97         u16 len;
  98         u16 entry_size; /* Size of an element in the queue */
  99         u16 id;
 100         u16 tail, head;
 101         bool created;
 102         atomic_t used;  /* Number of valid elements in the queue */
 103 };
 104
 105 static inline u32 MODULO(u16 val, u16 limit)
 106 {
 107         BUG_ON(limit & (limit - 1));
 108         return val & (limit - 1);
 109 }
 110
 111 static inline void index_adv(u16 *index, u16 val, u16 limit)
 112 {
 113         *index = MODULO((*index + val), limit);
 114 }
 115
 116 static inline void index_inc(u16 *index, u16 limit)
 117 {
 118         *index = MODULO((*index + 1), limit);
 119 }
 120
 121 static inline void *queue_head_node(struct be_queue_info *q)
 122 {
 123         return q->dma_mem.va + q->head * q->entry_size;
 124 }
 125
 126 static inline void *queue_tail_node(struct be_queue_info *q)
 127 {
 128         return q->dma_mem.va + q->tail * q->entry_size;
 129 }
 130
 131 static inline void queue_head_inc(struct be_queue_info *q)
 132 {
 133         index_inc(&q->head, q->len);
 134 }
 135
 136 static inline void queue_tail_inc(struct be_queue_info *q)
 137 {
 138         index_inc(&q->tail, q->len);
 139 }
 140
 141 struct be_eq_obj {
 142         struct be_queue_info q;
 143         char desc[32];
 144
 145         /* Adaptive interrupt coalescing (AIC) info */
 146         bool enable_aic;
 147         u16 min_eqd;            /* in usecs */
 148         u16 max_eqd;            /* in usecs */
 149         u16 cur_eqd;            /* in usecs */
 150
 151         struct napi_struct napi;
 152 };
 153
 154 struct be_mcc_obj {
 155         struct be_queue_info q;
 156         struct be_queue_info cq;
 157         bool rearm_cq;
 158 };
 159
 160 struct be_drvr_stats {
 161         u32 be_tx_reqs;         /* number of TX requests initiated */
 162         u32 be_tx_stops;        /* number of times TX Q was stopped */
 163         u32 be_fwd_reqs;        /* number of send reqs through forwarding i/f */
 164         u32 be_tx_wrbs;         /* number of tx WRBs used */
 165         u32 be_tx_events;       /* number of tx completion events  */
 166         u32 be_tx_compl;        /* number of tx completion entries processed */
 167         ulong be_tx_jiffies;
 168         u64 be_tx_bytes;
 169         u64 be_tx_bytes_prev;
 170         u64 be_tx_pkts;
 171         u32 be_tx_rate;
 172
 173         u32 cache_barrier[16];
 174
 175         u32 be_ethrx_post_fail;/* number of ethrx buffer alloc failures */
 176         u32 be_rx_polls;        /* number of times NAPI called poll function */
 177         u32 be_rx_events;       /* number of ucast rx completion events  */
 178         u32 be_rx_compl;        /* number of rx completion entries processed */
 179         ulong be_rx_jiffies;
 180         u64 be_rx_bytes;
 181         u64 be_rx_bytes_prev;
 182         u64 be_rx_pkts;
 183         u32 be_rx_rate;
 184         u32 be_rx_mcast_pkt;
 185         /* number of non ether type II frames dropped where
 186          * frame len > length field of Mac Hdr */
 187         u32 be_802_3_dropped_frames;
 188         /* number of non ether type II frames malformed where
 189          * in frame len < length field of Mac Hdr */
 190         u32 be_802_3_malformed_frames;
 191         u32 be_rxcp_err;        /* Num rx completion entries w/ err set. */
 192         ulong rx_fps_jiffies;   /* jiffies at last FPS calc */
 193         u32 be_rx_frags;
 194         u32 be_prev_rx_frags;
 195         u32 be_rx_fps;          /* Rx frags per second */
 196 };
 197
 198 struct be_stats_obj {
 199         struct be_drvr_stats drvr_stats;
 200         struct be_dma_mem cmd;
 201 };
 202
 203 struct be_tx_obj {
 204         struct be_queue_info q;
 205         struct be_queue_info cq;
 206         /* Remember the skbs that were transmitted */
 207         struct sk_buff *sent_skb_list[TX_Q_LEN];
 208 };
 209
 210 /* Struct to remember the pages posted for rx frags */
 211 struct be_rx_page_info {
 212         struct page *page;
 213         DEFINE_DMA_UNMAP_ADDR(bus);
 214         u16 page_offset;
 215         bool last_page_user;
 216 };
 217
 218 struct be_rx_obj {
 219         struct be_queue_info q;
 220         struct be_queue_info cq;
 221         struct be_rx_page_info page_info_tbl[RX_Q_LEN];
 222 };
 223
 224 struct be_vf_cfg {
 225         unsigned char vf_mac_addr[ETH_ALEN];
 226         u32 vf_if_handle;
 227         u32 vf_pmac_id;
 228         u16 vf_vlan_tag;
 229         u32 vf_tx_rate;
 230 };
 231
 232 #define BE_NUM_MSIX_VECTORS             2       /* 1 each for Tx and Rx */
 233 #define BE_INVALID_PMAC_ID              0xffffffff
 234 struct be_adapter {
 235         struct pci_dev *pdev;
 236         struct net_device *netdev;
 237
 238         u8 __iomem *csr;
 239         u8 __iomem *db;         /* Door Bell */
 240         u8 __iomem *pcicfg;     /* PCI config space */
 241
 242         spinlock_t mbox_lock;   /* For serializing mbox cmds to BE card */
 243         struct be_dma_mem mbox_mem;
 244         /* Mbox mem is adjusted to align to 16 bytes. The allocated addr
 245          * is stored for freeing purpose */
 246         struct be_dma_mem mbox_mem_alloced;
 247
 248         struct be_mcc_obj mcc_obj;
 249         spinlock_t mcc_lock;    /* For serializing mcc cmds to BE card */
 250         spinlock_t mcc_cq_lock;
 251
 252         struct msix_entry msix_entries[BE_NUM_MSIX_VECTORS];
 253         bool msix_enabled;
 254         bool isr_registered;
 255
 256         /* TX Rings */
 257         struct be_eq_obj tx_eq;
 258         struct be_tx_obj tx_obj;
 259
 260         u32 cache_line_break[8];
 261
 262         /* Rx rings */
 263         struct be_eq_obj rx_eq;
 264         struct be_rx_obj rx_obj;
 265         u32 big_page_size;      /* Compounded page size shared by rx wrbs */
 266         bool rx_post_starved;   /* Zero rx frags have been posted to BE */
 267
 268         struct vlan_group *vlan_grp;
 269         u16 vlans_added;
 270         u16 max_vlans;  /* Number of vlans supported */
 271         u8 vlan_tag[VLAN_GROUP_ARRAY_LEN];
 272         struct be_dma_mem mc_cmd_mem;
 273
 274         struct be_stats_obj stats;
 275         /* Work queue used to perform periodic tasks like getting statistics */
 276         struct delayed_work work;
 277
 278         /* Ethtool knobs and info */
 279         bool rx_csum;           /* BE card must perform rx-checksumming */
 280         char fw_ver[FW_VER_LEN];
 281         u32 if_handle;          /* Used to configure filtering */
 282         u32 pmac_id;            /* MAC addr handle used by BE card */
 283
 284         bool eeh_err;
 285         bool link_up;
 286         u32 port_num;
 287         bool promiscuous;
 288         bool wol;
 289         u32 function_mode;
 290         u32 rx_fc;              /* Rx flow control */
 291         u32 tx_fc;              /* Tx flow control */
 292         bool ue_detected;
 293         bool stats_ioctl_sent;
 294         int link_speed;
 295         u8 port_type;
 296         u8 transceiver;
 297         u8 autoneg;
 298         u8 generation;          /* BladeEngine ASIC generation */
 299         u32 flash_status;
 300         struct completion flash_compl;
 301
 302         bool sriov_enabled;
 303         struct be_vf_cfg vf_cfg[BE_MAX_VF];
 304         u8 base_eq_id;
 305         u8 is_virtfn;
 306 };
 307
 308 #define be_physfn(adapter) (!adapter->is_virtfn)
 309
 310 /* BladeEngine Generation numbers */
 311 #define BE_GEN2 2
 312 #define BE_GEN3 3
 313
 314 extern const struct ethtool_ops be_ethtool_ops;
 315
 316 #define drvr_stats(adapter)             (&adapter->stats.drvr_stats)
 317
 318 #define BE_SET_NETDEV_OPS(netdev, ops)  (netdev->netdev_ops = ops)
 319
 320 #define PAGE_SHIFT_4K           12
 321 #define PAGE_SIZE_4K            (1 << PAGE_SHIFT_4K)
 322
 323 /* Returns number of pages spanned by the data starting at the given addr */
 324 #define PAGES_4K_SPANNED(_address, size)                                \
 325                 ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) +     \
 326                         (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K))
 327
 328 /* Byte offset into the page corresponding to given address */
 329 #define OFFSET_IN_PAGE(addr)                                            \
 330                  ((size_t)(addr) & (PAGE_SIZE_4K-1))
 331
 332 /* Returns bit offset within a DWORD of a bitfield */
 333 #define AMAP_BIT_OFFSET(_struct, field)                                 \
 334                 (((size_t)&(((_struct *)0)->field))%32)
 335
 336 /* Returns the bit mask of the field that is NOT shifted into location. */
 337 static inline u32 amap_mask(u32 bitsize)
 338 {
 339         return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1);
 340 }
 341
 342 static inline void
 343 amap_set(void *ptr, u32 dw_offset, u32 mask, u32 offset, u32 value)
 344 {
 345         u32 *dw = (u32 *) ptr + dw_offset;
 346         *dw &= ~(mask << offset);
 347         *dw |= (mask & value) << offset;
 348 }
 349
 350 #define AMAP_SET_BITS(_struct, field, ptr, val)                         \
 351                 amap_set(ptr,                                           \
 352                         offsetof(_struct, field)/32,                    \
 353                         amap_mask(sizeof(((_struct *)0)->field)),       \
 354                         AMAP_BIT_OFFSET(_struct, field),                \
 355                         val)
 356
 357 static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset)
 358 {
 359         u32 *dw = (u32 *) ptr;
 360         return mask & (*(dw + dw_offset) >> offset);
 361 }
 362
 363 #define AMAP_GET_BITS(_struct, field, ptr)                              \
 364                 amap_get(ptr,                                           \
 365                         offsetof(_struct, field)/32,                    \
 366                         amap_mask(sizeof(((_struct *)0)->field)),       \
 367                         AMAP_BIT_OFFSET(_struct, field))
 368
 369 #define be_dws_cpu_to_le(wrb, len)      swap_dws(wrb, len)
 370 #define be_dws_le_to_cpu(wrb, len)      swap_dws(wrb, len)
 371 static inline void swap_dws(void *wrb, int len)
 372 {
 373 #ifdef __BIG_ENDIAN
 374         u32 *dw = wrb;
 375         BUG_ON(len % 4);
 376         do {
 377                 *dw = cpu_to_le32(*dw);
 378                 dw++;
 379                 len -= 4;
 380         } while (len);
 381 #endif                          /* __BIG_ENDIAN */
 382 }
 383
 384 static inline u8 is_tcp_pkt(struct sk_buff *skb)
 385 {
 386         u8 val = 0;
 387
 388         if (ip_hdr(skb)->version == 4)
 389                 val = (ip_hdr(skb)->protocol == IPPROTO_TCP);
 390         else if (ip_hdr(skb)->version == 6)
 391                 val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP);
 392
 393         return val;
 394 }
 395
 396 static inline u8 is_udp_pkt(struct sk_buff *skb)
 397 {
 398         u8 val = 0;
 399
 400         if (ip_hdr(skb)->version == 4)
 401                 val = (ip_hdr(skb)->protocol == IPPROTO_UDP);
 402         else if (ip_hdr(skb)->version == 6)
 403                 val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP);
 404
 405         return val;
 406 }
 407
 408 static inline void be_check_sriov_fn_type(struct be_adapter *adapter)
 409 {
 410         u8 data;
 411
 412         pci_write_config_byte(adapter->pdev, 0xFE, 0xAA);
 413         pci_read_config_byte(adapter->pdev, 0xFE, &data);
 414         adapter->is_virtfn = (data != 0xAA);
 415 }
 416
 417 extern void be_cq_notify(struct be_adapter *adapter, u16 qid, bool arm,
 418                 u16 num_popped);
 419 extern void be_link_status_update(struct be_adapter *adapter, bool link_up);
 420 extern void netdev_stats_update(struct be_adapter *adapter);
 421 extern int be_load_fw(struct be_adapter *adapter, u8 *func);
 422 #endif                          /* BE_H */