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_NAME_BE              OC_NAME "(be3)"
  42 #define OC_NAME_LANCER          OC_NAME "(Lancer)"
  43 #define DRV_DESC                "ServerEngines BladeEngine 10Gbps NIC Driver"
  44
  45 #define BE_VENDOR_ID            0x19a2
  46 #define EMULEX_VENDOR_ID        0x10df
  47 #define BE_DEVICE_ID1           0x211
  48 #define BE_DEVICE_ID2           0x221
  49 #define OC_DEVICE_ID1           0x700   /* Device Id for BE2 cards */
  50 #define OC_DEVICE_ID2           0x710   /* Device Id for BE3 cards */
  51 #define OC_DEVICE_ID3           0xe220  /* Device id for Lancer cards */
  52
  53 static inline char *nic_name(struct pci_dev *pdev)
  54 {
  55         switch (pdev->device) {
  56         case OC_DEVICE_ID1:
  57                 return OC_NAME;
  58         case OC_DEVICE_ID2:
  59                 return OC_NAME_BE;
  60         case OC_DEVICE_ID3:
  61                 return OC_NAME_LANCER;
  62         case BE_DEVICE_ID2:
  63                 return BE3_NAME;
  64         default:
  65                 return BE_NAME;
  66         }
  67 }
  68
  69 /* Number of bytes of an RX frame that are copied to skb->data */
  70 #define BE_HDR_LEN              64
  71 #define BE_MAX_JUMBO_FRAME_SIZE 9018
  72 #define BE_MIN_MTU              256
  73
  74 #define BE_NUM_VLANS_SUPPORTED  64
  75 #define BE_MAX_EQD              96
  76 #define BE_MAX_TX_FRAG_COUNT    30
  77
  78 #define EVNT_Q_LEN              1024
  79 #define TX_Q_LEN                2048
  80 #define TX_CQ_LEN               1024
  81 #define RX_Q_LEN                1024    /* Does not support any other value */
  82 #define RX_CQ_LEN               1024
  83 #define MCC_Q_LEN               128     /* total size not to exceed 8 pages */
  84 #define MCC_CQ_LEN              256
  85
  86 #define MAX_RSS_QS              4       /* BE limit is 4 queues/port */
  87 #define BE_MAX_MSIX_VECTORS     (MAX_RSS_QS + 1 + 1)/* RSS qs + 1 def Rx + Tx */
  88 #define BE_NAPI_WEIGHT          64
  89 #define MAX_RX_POST             BE_NAPI_WEIGHT /* Frags posted at a time */
  90 #define RX_FRAGS_REFILL_WM      (RX_Q_LEN - MAX_RX_POST)
  91
  92 #define FW_VER_LEN              32
  93
  94 #define BE_MAX_VF               32
  95
  96 struct be_dma_mem {
  97         void *va;
  98         dma_addr_t dma;
  99         u32 size;
 100 };
 101
 102 struct be_queue_info {
 103         struct be_dma_mem dma_mem;
 104         u16 len;
 105         u16 entry_size; /* Size of an element in the queue */
 106         u16 id;
 107         u16 tail, head;
 108         bool created;
 109         atomic_t used;  /* Number of valid elements in the queue */
 110 };
 111
 112 static inline u32 MODULO(u16 val, u16 limit)
 113 {
 114         BUG_ON(limit & (limit - 1));
 115         return val & (limit - 1);
 116 }
 117
 118 static inline void index_adv(u16 *index, u16 val, u16 limit)
 119 {
 120         *index = MODULO((*index + val), limit);
 121 }
 122
 123 static inline void index_inc(u16 *index, u16 limit)
 124 {
 125         *index = MODULO((*index + 1), limit);
 126 }
 127
 128 static inline void *queue_head_node(struct be_queue_info *q)
 129 {
 130         return q->dma_mem.va + q->head * q->entry_size;
 131 }
 132
 133 static inline void *queue_tail_node(struct be_queue_info *q)
 134 {
 135         return q->dma_mem.va + q->tail * q->entry_size;
 136 }
 137
 138 static inline void queue_head_inc(struct be_queue_info *q)
 139 {
 140         index_inc(&q->head, q->len);
 141 }
 142
 143 static inline void queue_tail_inc(struct be_queue_info *q)
 144 {
 145         index_inc(&q->tail, q->len);
 146 }
 147
 148 struct be_eq_obj {
 149         struct be_queue_info q;
 150         char desc[32];
 151
 152         /* Adaptive interrupt coalescing (AIC) info */
 153         bool enable_aic;
 154         u16 min_eqd;            /* in usecs */
 155         u16 max_eqd;            /* in usecs */
 156         u16 cur_eqd;            /* in usecs */
 157         u8  msix_vec_idx;
 158
 159         struct napi_struct napi;
 160 };
 161
 162 struct be_mcc_obj {
 163         struct be_queue_info q;
 164         struct be_queue_info cq;
 165         bool rearm_cq;
 166 };
 167
 168 struct be_tx_stats {
 169         u32 be_tx_reqs;         /* number of TX requests initiated */
 170         u32 be_tx_stops;        /* number of times TX Q was stopped */
 171         u32 be_tx_wrbs;         /* number of tx WRBs used */
 172         u32 be_tx_events;       /* number of tx completion events  */
 173         u32 be_tx_compl;        /* number of tx completion entries processed */
 174         ulong be_tx_jiffies;
 175         u64 be_tx_bytes;
 176         u64 be_tx_bytes_prev;
 177         u64 be_tx_pkts;
 178         u32 be_tx_rate;
 179 };
 180
 181 struct be_tx_obj {
 182         struct be_queue_info q;
 183         struct be_queue_info cq;
 184         /* Remember the skbs that were transmitted */
 185         struct sk_buff *sent_skb_list[TX_Q_LEN];
 186 };
 187
 188 /* Struct to remember the pages posted for rx frags */
 189 struct be_rx_page_info {
 190         struct page *page;
 191         DEFINE_DMA_UNMAP_ADDR(bus);
 192         u16 page_offset;
 193         bool last_page_user;
 194 };
 195
 196 struct be_rx_stats {
 197         u32 rx_post_fail;/* number of ethrx buffer alloc failures */
 198         u32 rx_polls;   /* number of times NAPI called poll function */
 199         u32 rx_events;  /* number of ucast rx completion events  */
 200         u32 rx_compl;   /* number of rx completion entries processed */
 201         ulong rx_jiffies;
 202         u64 rx_bytes;
 203         u64 rx_bytes_prev;
 204         u64 rx_pkts;
 205         u32 rx_rate;
 206         u32 rx_mcast_pkts;
 207         u32 rxcp_err;   /* Num rx completion entries w/ err set. */
 208         ulong rx_fps_jiffies;   /* jiffies at last FPS calc */
 209         u32 rx_frags;
 210         u32 prev_rx_frags;
 211         u32 rx_fps;             /* Rx frags per second */
 212 };
 213
 214 struct be_rx_obj {
 215         struct be_adapter *adapter;
 216         struct be_queue_info q;
 217         struct be_queue_info cq;
 218         struct be_rx_page_info page_info_tbl[RX_Q_LEN];
 219         struct be_eq_obj rx_eq;
 220         struct be_rx_stats stats;
 221         u8 rss_id;
 222         bool rx_post_starved;   /* Zero rx frags have been posted to BE */
 223         u16 last_frag_index;
 224         u16 rsvd;
 225         u32 cache_line_barrier[15];
 226 };
 227
 228 struct be_vf_cfg {
 229         unsigned char vf_mac_addr[ETH_ALEN];
 230         u32 vf_if_handle;
 231         u32 vf_pmac_id;
 232         u16 vf_vlan_tag;
 233         u32 vf_tx_rate;
 234 };
 235
 236 #define BE_INVALID_PMAC_ID              0xffffffff
 237 struct be_adapter {
 238         struct pci_dev *pdev;
 239         struct net_device *netdev;
 240
 241         u8 __iomem *csr;
 242         u8 __iomem *db;         /* Door Bell */
 243         u8 __iomem *pcicfg;     /* PCI config space */
 244
 245         struct mutex mbox_lock; /* For serializing mbox cmds to BE card */
 246         struct be_dma_mem mbox_mem;
 247         /* Mbox mem is adjusted to align to 16 bytes. The allocated addr
 248          * is stored for freeing purpose */
 249         struct be_dma_mem mbox_mem_alloced;
 250
 251         struct be_mcc_obj mcc_obj;
 252         spinlock_t mcc_lock;    /* For serializing mcc cmds to BE card */
 253         spinlock_t mcc_cq_lock;
 254
 255         struct msix_entry msix_entries[BE_MAX_MSIX_VECTORS];
 256         bool msix_enabled;
 257         bool isr_registered;
 258
 259         /* TX Rings */
 260         struct be_eq_obj tx_eq;
 261         struct be_tx_obj tx_obj;
 262         struct be_tx_stats tx_stats;
 263
 264         u32 cache_line_break[8];
 265
 266         /* Rx rings */
 267         struct be_rx_obj rx_obj[MAX_RSS_QS + 1]; /* one default non-rss Q */
 268         u32 num_rx_qs;
 269         u32 big_page_size;      /* Compounded page size shared by rx wrbs */
 270
 271         u8 msix_vec_next_idx;
 272
 273         struct vlan_group *vlan_grp;
 274         u16 vlans_added;
 275         u16 max_vlans;  /* Number of vlans supported */
 276         u8 vlan_tag[VLAN_N_VID];
 277         u8 vlan_prio_bmap;      /* Available Priority BitMap */
 278         u16 recommended_prio;   /* Recommended Priority */
 279         struct be_dma_mem mc_cmd_mem;
 280
 281         struct be_dma_mem stats_cmd;
 282         /* Work queue used to perform periodic tasks like getting statistics */
 283         struct delayed_work work;
 284
 285         /* Ethtool knobs and info */
 286         bool rx_csum;           /* BE card must perform rx-checksumming */
 287         char fw_ver[FW_VER_LEN];
 288         u32 if_handle;          /* Used to configure filtering */
 289         u32 pmac_id;            /* MAC addr handle used by BE card */
 290
 291         bool eeh_err;
 292         bool link_up;
 293         u32 port_num;
 294         bool promiscuous;
 295         bool wol;
 296         u32 function_mode;
 297         u32 function_caps;
 298         u32 rx_fc;              /* Rx flow control */
 299         u32 tx_fc;              /* Tx flow control */
 300         bool ue_detected;
 301         bool stats_ioctl_sent;
 302         int link_speed;
 303         u8 port_type;
 304         u8 transceiver;
 305         u8 autoneg;
 306         u8 generation;          /* BladeEngine ASIC generation */
 307         u32 flash_status;
 308         struct completion flash_compl;
 309
 310         bool sriov_enabled;
 311         struct be_vf_cfg vf_cfg[BE_MAX_VF];
 312         u8 is_virtfn;
 313         u32 sli_family;
 314 };
 315
 316 #define be_physfn(adapter) (!adapter->is_virtfn)
 317
 318 /* BladeEngine Generation numbers */
 319 #define BE_GEN2 2
 320 #define BE_GEN3 3
 321
 322 #define lancer_chip(adapter)            (adapter->pdev->device == OC_DEVICE_ID3)
 323
 324 extern const struct ethtool_ops be_ethtool_ops;
 325
 326 #define tx_stats(adapter)               (&adapter->tx_stats)
 327 #define rx_stats(rxo)                   (&rxo->stats)
 328
 329 #define BE_SET_NETDEV_OPS(netdev, ops)  (netdev->netdev_ops = ops)
 330
 331 #define for_all_rx_queues(adapter, rxo, i)                              \
 332         for (i = 0, rxo = &adapter->rx_obj[i]; i < adapter->num_rx_qs;  \
 333                 i++, rxo++)
 334
 335 /* Just skip the first default non-rss queue */
 336 #define for_all_rss_queues(adapter, rxo, i)                             \
 337         for (i = 0, rxo = &adapter->rx_obj[i+1]; i < (adapter->num_rx_qs - 1);\
 338                 i++, rxo++)
 339
 340 #define PAGE_SHIFT_4K           12
 341 #define PAGE_SIZE_4K            (1 << PAGE_SHIFT_4K)
 342
 343 /* Returns number of pages spanned by the data starting at the given addr */
 344 #define PAGES_4K_SPANNED(_address, size)                                \
 345                 ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) +     \
 346                         (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K))
 347
 348 /* Byte offset into the page corresponding to given address */
 349 #define OFFSET_IN_PAGE(addr)                                            \
 350                  ((size_t)(addr) & (PAGE_SIZE_4K-1))
 351
 352 /* Returns bit offset within a DWORD of a bitfield */
 353 #define AMAP_BIT_OFFSET(_struct, field)                                 \
 354                 (((size_t)&(((_struct *)0)->field))%32)
 355
 356 /* Returns the bit mask of the field that is NOT shifted into location. */
 357 static inline u32 amap_mask(u32 bitsize)
 358 {
 359         return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1);
 360 }
 361
 362 static inline void
 363 amap_set(void *ptr, u32 dw_offset, u32 mask, u32 offset, u32 value)
 364 {
 365         u32 *dw = (u32 *) ptr + dw_offset;
 366         *dw &= ~(mask << offset);
 367         *dw |= (mask & value) << offset;
 368 }
 369
 370 #define AMAP_SET_BITS(_struct, field, ptr, val)                         \
 371                 amap_set(ptr,                                           \
 372                         offsetof(_struct, field)/32,                    \
 373                         amap_mask(sizeof(((_struct *)0)->field)),       \
 374                         AMAP_BIT_OFFSET(_struct, field),                \
 375                         val)
 376
 377 static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset)
 378 {
 379         u32 *dw = (u32 *) ptr;
 380         return mask & (*(dw + dw_offset) >> offset);
 381 }
 382
 383 #define AMAP_GET_BITS(_struct, field, ptr)                              \
 384                 amap_get(ptr,                                           \
 385                         offsetof(_struct, field)/32,                    \
 386                         amap_mask(sizeof(((_struct *)0)->field)),       \
 387                         AMAP_BIT_OFFSET(_struct, field))
 388
 389 #define be_dws_cpu_to_le(wrb, len)      swap_dws(wrb, len)
 390 #define be_dws_le_to_cpu(wrb, len)      swap_dws(wrb, len)
 391 static inline void swap_dws(void *wrb, int len)
 392 {
 393 #ifdef __BIG_ENDIAN
 394         u32 *dw = wrb;
 395         BUG_ON(len % 4);
 396         do {
 397                 *dw = cpu_to_le32(*dw);
 398                 dw++;
 399                 len -= 4;
 400         } while (len);
 401 #endif                          /* __BIG_ENDIAN */
 402 }
 403
 404 static inline u8 is_tcp_pkt(struct sk_buff *skb)
 405 {
 406         u8 val = 0;
 407
 408         if (ip_hdr(skb)->version == 4)
 409                 val = (ip_hdr(skb)->protocol == IPPROTO_TCP);
 410         else if (ip_hdr(skb)->version == 6)
 411                 val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP);
 412
 413         return val;
 414 }
 415
 416 static inline u8 is_udp_pkt(struct sk_buff *skb)
 417 {
 418         u8 val = 0;
 419
 420         if (ip_hdr(skb)->version == 4)
 421                 val = (ip_hdr(skb)->protocol == IPPROTO_UDP);
 422         else if (ip_hdr(skb)->version == 6)
 423                 val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP);
 424
 425         return val;
 426 }
 427
 428 static inline void be_check_sriov_fn_type(struct be_adapter *adapter)
 429 {
 430         u8 data;
 431         u32 sli_intf;
 432
 433         if (lancer_chip(adapter)) {
 434                 pci_read_config_dword(adapter->pdev, SLI_INTF_REG_OFFSET,
 435                                                                 &sli_intf);
 436                 adapter->is_virtfn = (sli_intf & SLI_INTF_FT_MASK) ? 1 : 0;
 437         } else {
 438                 pci_write_config_byte(adapter->pdev, 0xFE, 0xAA);
 439                 pci_read_config_byte(adapter->pdev, 0xFE, &data);
 440                 adapter->is_virtfn = (data != 0xAA);
 441         }
 442 }
 443
 444 static inline void be_vf_eth_addr_generate(struct be_adapter *adapter, u8 *mac)
 445 {
 446         u32 addr;
 447
 448         addr = jhash(adapter->netdev->dev_addr, ETH_ALEN, 0);
 449
 450         mac[5] = (u8)(addr & 0xFF);
 451         mac[4] = (u8)((addr >> 8) & 0xFF);
 452         mac[3] = (u8)((addr >> 16) & 0xFF);
 453         mac[2] = 0xC9;
 454         mac[1] = 0x00;
 455         mac[0] = 0x00;
 456 }
 457
 458 extern void be_cq_notify(struct be_adapter *adapter, u16 qid, bool arm,
 459                 u16 num_popped);
 460 extern void be_link_status_update(struct be_adapter *adapter, bool link_up);
 461 extern void netdev_stats_update(struct be_adapter *adapter);
 462 extern int be_load_fw(struct be_adapter *adapter, u8 *func);
 463 #endif                          /* BE_H */